WO2017218630A2 - Nanoparticules d'agent thérapeutique revêtues de phospholipide et procédés associés - Google Patents
Nanoparticules d'agent thérapeutique revêtues de phospholipide et procédés associés Download PDFInfo
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- WO2017218630A2 WO2017218630A2 PCT/US2017/037402 US2017037402W WO2017218630A2 WO 2017218630 A2 WO2017218630 A2 WO 2017218630A2 US 2017037402 W US2017037402 W US 2017037402W WO 2017218630 A2 WO2017218630 A2 WO 2017218630A2
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- WIPO (PCT)
- Prior art keywords
- nanoparticle
- phospholipid
- therapeutic agent
- agents
- coated
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/48—Preparations in capsules, e.g. of gelatin, of chocolate
- A61K9/50—Microcapsules having a gas, liquid or semi-solid filling; Solid microparticles or pellets surrounded by a distinct coating layer, e.g. coated microspheres, coated drug crystals
- A61K9/5005—Wall or coating material
- A61K9/5015—Organic compounds, e.g. fats, sugars
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/335—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin
- A61K31/337—Heterocyclic compounds having oxygen as the only ring hetero atom, e.g. fungichromin having four-membered rings, e.g. taxol
Definitions
- hydrophobic therapeutic agents are administered in delivery vehicles that are less than advantageous with regard to delivery properties including therapeutic agent dose and bioavailability. Furthermore, serious side effects are occasionally observed associated with the vehicle itself.
- Paclitaxel is one of the most effective chemotherapeutic drugs and is used to treat mainly breast, lung and ovarian cancers.
- Taxol ® is a paclitaxel formulation that utilizes a solvent, cremophor EL, to solubilize and deliver the essentially water-insoluble paclitaxel. Disadvantages and side effects of Taxol ® are directly associated this solvent.
- Paclitaxel has also been formulated as nanoparticles.
- Abraxane ® is a nanoparticle paclitaxel formulation having improved paclitaxel solubility (0.35-0.7 ⁇ g/mL) compared to Taxol ® and avoids the use of a harmful solvent.
- Abraxane ® is a human serum albumin-coated paclitaxel nanoparticle.
- Cynviloq ® a polymeric micelle paclitaxel formulation that uses a biocompatible chemical polymer rather that a biological polymer to stabilize the nanoparticle, is a next-generation paclitaxel product.
- the present invention provides phospholipid-coated therapeutic agent nanoparticles suitable for administration by injection, pharmaceutical compositions that include the nanoparticle, methods for treating diseases and conditions treatable by the therapeutic agents, and methods for making the nanoparticles.
- the invention provides phospholipid-coated therapeutic agent nanoparticle.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the nanoparticle is stable in aqueous delivery vehicles for administration and releases the therapeutic agent substantially instantaneously upon exposure to physiological fluid.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the nanoparticle is as stable in aqueous delivery vehicles for administration as synthetic polymeric micelles containing a therapeutic agent (Genexol-PM®, Cynviloq®) and is as effective in releasing the therapeutic agent under physiological conditions as a human- serum albumin-coated therapeutic agent (Abraxane®).
- a therapeutic agent Geneexol-PM®, Cynviloq®
- Abraxane® a human- serum albumin-coated therapeutic agent
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the phospholipid is a mono-acylphospholipid.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the phospholipid comprises a mono-acylphospholipid and a diacylphospholipid.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the phospholipid is a diacylphospholipid having a fatty acid component having from 10 to 16 carbon atoms.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the nanoparticle is substantially electronically neutral based on phospholipid composition.
- the phospholipid-coated therapeutic agent nanoparticle consists essentially of a particulate therapeutic agent coated with one or more phospholipids.
- the phospholipid-coated therapeutic agent nanoparticle consisting of a particulate therapeutic agent coated with one or more phospholipids.
- the phospholipid is a diacylphospholipid.
- Suitable diacylphospholipids include diacylphosphatidylcholines, diacylphosphatidylethanolamines, diacylphosphatidylglycerols, diacylphosphatidylserines, diacylphosphatidylinositols, and diacylphosphatidic acids, and mixtures thereof.
- the phospholipid is a phosphatidylcholine.
- the phospholipid is a phosphatidylcholine having a fatty acid component having from 10 to 22 carbons.
- the phospholipid is a phosphatidylcholine having a fatty acid component having from 10 to 12 carbons.
- the phospholipid is a mono-acylphospholipid.
- Suitable mono-acylphospholipids include lysophosphatidylcholines, lysophosphatidylethanolamines, lysophosphatidylglycerols, lysophosphatidylserines, lysophosphatidylinositols, and lysophosphatidic acids, and mixtures thereof.
- the phospholipid is a lysophosphatidylcholine.
- the phospholipid is a lysophosphatidylcholine having a fatty acid component having from 10 to 12 carbons.
- the phospholipid is a combination of a diacylphospholipid and a mono-acylphospholipid. In certain embodiments, the phospholipid is a combination of a phosphatidylcholine and a lysophosphatidylcholine. In certain embodiments that include a combination of a diacylphospholipid and a mono-acylphospholipid, the ratio of diacylphospholipid to mono-acylphospholipid is from about 90: 10 to about 60:40 weight/weight (w/w) percent. In other embodiments, the ratio of diacylphospholipid to mono-acylphospholipid of is about 80:20 w/w percent.
- the nanoparticle includes a therapeutic agent having an X log P greater than 2.0.
- Suitable therapeutic agents include analgesics/antipyretics, anesthetics, antiasthamatics, antibiotics, antidepressants, antidiabetics, antifungal agents, antihypertensive agents, anti-inflammatories, antineoplastics, antianxiety agents, immunosuppressive agents, antimigraine agents, sedatives/hypnotics, antianginal agents, antipsychotic agents, antimanic agents, antiarrhythmics, antiarthritic agents, antigout agents, anticoagulants, thrombolytic agents, antifibrinolytic agents, hemorheologic agents, antiplatelet agents, anticonvulsants, antiparkinson agents, antihistamines/antipruritics, agents useful for calcium regulation, antibacterial agents, antiviral agents, antimicrobials, anti-infectives, bronchodialators, hormones, hypoglycemic agents, hypolipidemic agents, proteins, nucleic acids, agents useful for erythropoiesis stimulation, antiulcer
- the therapeutic agent is a chemotherapeutic agent.
- Representative chemotherapeutic agents include taxanes, such as paclitaxel and derivatives thereof, and docetaxel and derivatives thereof.
- the therapeutic agent is paclitaxel.
- the therapeutic agent is in crystalline form. In other embodiments, the therapeutic agent is in amorphous form.
- the nanoparticle has an average diameter from about 30-300 nm. In other embodiments, the nanoparticle has an average diameter from about 80-200 nm.
- the invention provides a pharmaceutical composition, comprising a nanoparticle of the invention.
- the nanoparticle is in the form of a dry powder.
- the composition further includes a pharmaceutically acceptable carrier.
- the nanoparticle is stably suspended in an aqueous medium.
- the composition further comprises a particle size stabilizing agent.
- the composition is a pharmaceutical composition for injection and comprises a nanoparticle of the invention a pharmaceutically acceptable carrier.
- the invention provides a unit dosage form for treating in an individual that includes a nanoparticle of the invention and a pharmaceutically acceptable carrier.
- kits in another aspect of the invention, comprises a container that includes a nanoparticle of the invention, and a container comprising a pharmaceutically acceptable carrier for reconstituting the nanoparticle.
- the kit comprises a container that includes a nanoparticle of the invention suspended in a pharmaceutically acceptable carrier.
- the kits optionally include instructions for using the kit in treating a disease or condition.
- methods of treating a disease or condition in an individual comprise administering to an individual in need thereof an effective amount of the nanoparticle of the invention.
- the disease or condition is a proliferative disease or condition.
- the therapeutic agent is paclitaxel and the disease is a disease treatable by administering paclitaxel.
- the therapeutic agent is paclitaxel and the disease is a cancer treatable by administering paclitaxel.
- the nanoparticle is prepared by a microfluidization- solvent removal method. In another embodiment, the nanoparticle is prepared by a thin film-hydration method.
- the method for preparing a phospholipid-coated therapeutic agent nanoparticle comprises subjecting an organic phase containing a therapeutic agent dispersed therein and aqueous medium containing phospholipid to high shear conditions in a high pressure homogenizer to provide a homogenized phospholipid- coated therapeutic agent nanoparticle mixture.
- the method further comprises sterile filtering the mixture.
- subjecting the organic phase to high shear conditions comprises using a high pressure homogenizer at a pressure in the range of about 3,000 up to 30,000 psi.
- the method further comprises removing the organic phase from the mixture.
- the method further comprises removing the aqueous medium from the mixture.
- removing the aqueous medium from the mixture comprises lyophilizing the mixture to provide a nanoparticle powder.
- the method for preparing a phospholipid-coated therapeutic agent nanoparticle comprises dissolving a therapeutic agent and a phospholipid in an organic phase to provide a solution, concentrating the solution to dryness to provide a film, and hydrating the film with water to provide a aqueous suspension of phospholipid- coated therapeutic agent nanoparticles.
- the organic phase is ethanol.
- concentrating the solution to dryness comprises rotary evaporation.
- the water is deionized water.
- the method further comprises sterile filtering the aqueous suspension.
- the methods of the invention provide nanoparticles of the invention.
- FIGURE 1 is a schematic illustration comparing the evolution of formulations of paclitaxel therapy.
- FIGURE 2 schematically illustrates the chemical structures of phospholipids
- phosphatidylcholines and lyso-phosphatidylcholines useful in making representative phospholipid-coated therapeutic agent nanoparticles of the invention.
- FIGURE 3 is a graph comparing nanoparticle size and size distribution of representative phospholipid-coated therapeutic agent nanoparticles of the invention prepared by a microfluidization-solvent evaporation method.
- FIGURE 4 compares the effect of phospholipid and lyso-phospholipid ratio on nanoparticle size and therapeutic agent entrapment efficiency for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention.
- FIGURE 5 compares the effect of the number of extrusion cycles on nanoparticle size and therapeutic agent entrapment efficiency for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention prepared by a microfluidization-solvent evaporation method.
- FIGURE 6 compares particle size as a function of time for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention.
- FIGURE 8 compares electrochemical response (cyclic voltammetry: current (mA) v. applied potential (V)) for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention (PC 12: Lyso 12) prepared by microfluidization and thin film evaporation methods.
- FIGURE 9 compares dissolution of representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention in deionized water (DI), phosphate buffered saline (PBS), and human plasma (50 mg/mL human serum albumin/PBS) showing particle size (nm) as a function of paclitaxel concentration ⁇ g/mL).
- DI deionized water
- PBS phosphate buffered saline
- human plasma 50 mg/mL human serum albumin/PBS
- FIGURES 10A, 10B, and IOC compare dissolution of Abraxane® nanoparticles (10A), Genexol-PM® nanoparticles (10B), and representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention (IOC) in deionized water (water), phosphate buffered saline (PBS), serum (0.1X: 5 mg/mL HS A/PBS), serum (1.0X: 50 mg/mL HS A/PBS), simulated plasma (50 mg/mL HSA/PBS), and plasma showing particle size (nm) as a function of paclitaxel concentration ⁇ g/mL).
- PBS phosphate buffered saline
- serum 0.1X: 5 mg/mL HS A/PBS
- serum 1.0X: 50 mg/mL HS A/PBS
- simulated plasma 50 mg/mL HSA/PBS
- plasma showing particle size (nm) as a function of paclitaxel concentration
- FIGURE 11 compares paclitaxel loading (%) for representative phospholipid- coated therapeutic agent (paclitaxel) nanoparticles of the invention, PC-coated paclitaxel nanoparticle, prepared by microfluidization- solvent evaporation (Method 1) and thin film-hydration evaporation (Method 2) methods.
- FIGURE 12 compares particle size (nm) for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention, PC-coated paclitaxel nanoparticle, prepared by microfluidization- solvent evaporation (Method 1) and thin film-hydration (Method 2) methods.
- FIGURE 13 compares paclitaxel loading (%) for representative phospholipid- coated therapeutic agent (paclitaxel) nanoparticles of the invention as a function of PC carbon length (6-22) prepared by the thin film-hydration method (Method 2).
- FIGURE 14 compares paclitaxel loading (%) for representative phospholipid- coated therapeutic agent (paclitaxel) nanoparticles of the invention as a rehydration water temperature for nanoparticles prepared by the thin film-hydration method (Method 2).
- FIGURE 15 compares particle size as a function of lyoprotectant and lyoprotectant amount for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention, PC-coated paclitaxel nanoparticle manufactured by thin film-hydration method (LM-101), before lyophilization and after reconstitution.
- LM-101 thin film-hydration method
- LM-101 thin film-hydration method
- the present invention provides phospholipid-coated therapeutic agent nanoparticles suitable for administration by injection, pharmaceutical compositions that include the nanoparticle, methods for treating diseases and conditions treatable by the therapeutic agents, and methods for making the nanoparticles.
- Phospholipid-Coated Therapeutic Agent Nanoparticle suitable for administration by injection, pharmaceutical compositions that include the nanoparticle, methods for treating diseases and conditions treatable by the therapeutic agents, and methods for making the nanoparticles.
- the invention provides phospholipid-coated therapeutic agent nanoparticle.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the nanoparticle is stable in aqueous delivery vehicles for administration (e.g., vehicles for injection) and releases the therapeutic agent substantially instantaneously upon exposure to or contact with a physiological fluid.
- aqueous delivery vehicles for administration e.g., vehicles for injection
- substantially instantaneously refers to release of the therapeutic agent from the nanoparticle within about 1 second, within about 2 seconds, within about 5 seconds, within about 10 seconds, or within about 30 seconds after contact with a physiological fluid, such as blood, serum, plasma (e.g., intravenous injection).
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the nanoparticle is as stable in aqueous delivery vehicles for administration as synthetic polymeric micelles containing a therapeutic agent (Genexol-PM®, Cynviloq®) and is as effective in releasing the therapeutic agent under physiological conditions as a human- serum albumin-coated therapeutic agent (Abraxane®).
- a therapeutic agent Geneexol-PM®, Cynviloq®
- Abraxane® a human- serum albumin-coated therapeutic agent
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the phospholipid is a mono-acylphospholipid.
- the nanoparticle may include only a mono-acylphospholipid, or may further include a diacylphospholipid.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the phospholipid comprises a mono-acylphospholipid and a diacylphospholipid.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the phospholipid is a diacylphospholipid having a fatty acid component having from 10 to 16 carbon atoms.
- the nanoparticle may further include a mono-acylphospholipid.
- the phospholipid-coated therapeutic agent nanoparticle comprises a particulate therapeutic agent coated with one or more phospholipids, wherein the nanoparticle is substantially electronically neutral based on phospholipid composition.
- the phospholipid-coated therapeutic agent nanoparticle consists essentially of a particulate therapeutic agent coated with one or more phospholipids.
- the phospholipid-coated therapeutic agent nanoparticle consisting of a particulate therapeutic agent coated with one or more phospholipids.
- the invention provides a phospholipid-coated therapeutic agent nanoparticle.
- phospholipid-coated therapeutic agent nanoparticle refers to a nanoparticle comprising a therapeutic agent in particulate form coated with one or more phospholipids.
- the phospholipid coating the particulate therapeutic agent advantageously stabilizes the therapeutic agent and facilitates its effective administration.
- the phospholipid-coated therapeutic agent nanoparticle advantageously provides for the effective formulation and delivery of hydrophobic or substantially water insoluble therapeutic agents.
- Therapeutic agents advantageously formulated as nanoparticles of the invention include hydrophobic or substantially water-insoluble pharmacologically active agents (i.e., any bioactive agent having limited solubility in an aqueous or hydrophilic environment).
- the solubility in water of these agents at 20-25 °C may be less than about 5, 2, 1, 0.5, 0.2, 0.1, 0.05, 0.02, or 0.01 mg/mL.
- chemotherapeutic agents defined by their octanol/water partition coefficient X log P (Wang et al. Chem. Inf. Comput. Sci. 1997, 37, 615-621).
- the coefficient for paclitaxel is 3.0.
- therapeutic agents with X log P greater than 2.0 are excellent candidates for incorporation into the nanoparticles of the invention. This characteristic includes over half of the approved pharmaceutical agents currently employed for parenteral administration.
- hydrophobic and substantially water-insoluble and “poorly water-soluble” refer to therapeutic agents having an octanol/water partition coefficient X log P greater than 2.0, and in certain embodiments greater than 3.0, and in other embodiments greater than 4.0.
- Representative therapeutic agents include analgesics/antipyretics, anesthetics, antiasthamatics, antibiotics, antidepressants, antidiabetics, antifungal agents, antihypertensive agents, anti-inflammatories, antineoplastics, antianxiety agents, immunosuppressive agents, antimigraine agents, sedatives/hypnotics, antianginal agents, antipsychotic agents, antimanic agents, antiarrhythmics, antiarthritic agents, antigout agents, anticoagulants, thrombolytic agents, antifibrinolytic agents, hemorheologic agents, antiplatelet agents, anticonvulsants, antiparkinson agents, antihistamines/antipruritics, agents useful for calcium regulation, antibacterial agents, antiviral agents, antimicrobials, anti-infectives, bronchodialators, hormones, hypoglycemic agents, hypolipidemic agents, proteins, nucleic acids, agents useful for erythropoiesis stimulation, antiulcer/
- the therapeutic agent is an antineoplastic selected from adriamycin, cyclophosphamide, actinomycin, bleomycin, daunorubicin, doxorubicin, epirubicin, mitomycin, methotrexate, fluorouracil, carboplatin, carmustine (BCNU), methyl-CCNU, cisplatin, etoposide, teniposide, daunomycin, indomethacin, biphenyl dimethyl dicarboxylate, interferon, camptothecin and derivatives thereof, phenesterine, paclitaxel and derivatives thereof, docetaxel and derivatives thereof, epothilones and derivatives thereof, vinblastine, vincristine, tamoxifen, etoposide, or piposulfan.
- Representative antineoplastic agents include taxanes and their derivatives, such as paclitaxel.
- the therapeutic agent is an immunosuppressive agent selected from cyclosporine, azathioprine, mizoribine, or FK506 (tacrolimus).
- the therapeutic agent nanoparticle of the invention includes one or more phospholipids coating the therapeutic agent.
- phospholipid refers to a class of lipids having a hydrophobic tail (e.g., one or two) and a phosphate head group. Hydrophilicity is conferred to the phospholipid by it phosphate head group and hydrophobicity is conferred to the phospholipid by apolar groups that include long-chain saturated and unsaturated aliphatic hydrocarbon groups and such groups substituted by one or more aromatic, cycloaliphatic, or heterocyclic groups (e.g., fatty acid acyl groups).
- phospholipid refers to phosphatidic acids, phosphoglycerides, and phosphosphingolipids.
- Phosphatidic acids include a phosphate group coupled to a glycerol group, which may be mono- or diacylated.
- Phosphoglycerides include a phosphate group intermediate an organic group (e.g., choline, ethanolamine, serine, inositol) and a glycerol group, which may be mono- or diacylated.
- Phosphosphingolipids include a phosphate group intermediate an organic group (e.g., choline, ethanolamine) and a sphingosine (non-acylated) or ceramide (acylated) group.
- the phospholipids useful in the compositions and methods of the invention include their salts (e.g., sodium, ammonium).
- salts e.g., sodium, ammonium
- individual geometrical isomers cis, trans
- mixtures of isomers are included.
- Representative phospholipids include phosphatidylcholines, phosphatidylethanolamines, phosphatidylglycerols, phosphatidylserines, phosphatidylinositols, and phosphatidic acids, and their lysophosphatidyl (e.g., lysophosphatidylcholines and lysophosphatidylethanolamine) and diacyl phospholipid (e.g., diacylphosphatidylcholines, diacylphosphatidylethanolamines, diacylphosphatidylglycerols, diacylphosphatidylserines, diacylphosphatidylinositols, and diacylphosphatidic acids) counterparts.
- lysophosphatidyl e.g., lysophosphatidylcholines and lysophosphatidylethanolamine
- diacyl phospholipid e.g., diacyl
- the acyl groups of the phospholipids may be the same or different.
- the acyl groups are derived from fatty acids having Cio-C 24 carbon chains (e.g., acyl groups such as decanoyl (CIO), dodecanoyl (also known as lauroyl) (C12), tetradecanoyl (also known as myristoyl) (C14), hexadecanoyl (also known as palmitoyl) (C16), octadecanoyl (also known as stearoyl) (CI 8), oleoyl, linoleoyl, linolenoyl, arachidonoyl groups).
- CIO decanoyl
- dodecanoyl also known as lauroyl
- tetradecanoyl also known as myristoyl
- C16 hexadecanoyl
- octadecanoyl also known as stea
- diacylphosphatidylcholines include distearoylphosphatidylcholine (DSPC), dioleoylphosphatidylcholine (DOPC), dipalmitoylphosphatidylcholine (DPPC), dilinoleoylphosphatidylcholine (DLPC), palmitoyloleoylphosphatidylcholine (POPC), palmitoyllinoleoylphosphatidylcholine, stearoyllinoleoylphosphatidylcholine stearoyloleoylphosphatidylcholine, stearoylarachidoylphosphatidylcholine, didecanoylphosphatidylcholine (DDPC), didodecanoylphosphatidylcholine, dierucoylphosphatidylcholine (DEPC), d
- diacylphosphatidylethanolamines include dioleoylphosphatidylethanolamine (DOPE), dipalmitoylphosphatidylethanolamine (DPPE), distearoylphosphatidylethanolamine (DSPE), dilauroylphosphatidylethanolamine (DLPE), dimyristoylphosphatidylethanolamine (DMPE), dierucoylphosphatidylethanolamine (DEPE), didecanoylphosphatidylethanolamine, didodecanoylphosphatidylethanolamine, and palmitoyloleoylphosphatidylethanolamine (POPE).
- DOPE dioleoylphosphatidylethanolamine
- DPPE dipalmitoylphosphatidylethanolamine
- DSPE distearoylphosphatidylethanolamine
- DLPE dimyristoylphosphatidylethanolamine
- DEPE dierucoylphosphatidylethanolamine
- diacylphosphatidylglycerols include dioleoyrphosphatidylglycerol (DOPG), dipalmitoylphosphatidylglycerol (DPPG), dierucoylphosphatidylglycerol (DEPG), dilauroylphosphatidylglycerol (DLPG), dimyristoylphosphatidylglycerol (DMPG), distearoyiphosphatidylglycerol (DSPG), didecanoylphosphatidylglycerol, didodecanoylphosphatidylglycerol, and palmitoyloleoylphosphatidylglycerol (POPG).
- DOPG dioleoyrphosphatidylglycerol
- DPPG dipalmitoylphosphatidylglycerol
- DEPG dierucoylphosphatidylglycerol
- DLPG dimyristoylphosphatidyl
- diacylphosphatidylserines include dilauroylphosphatidylserine (also known as didodecanoylphosphatidylserine) (DLPS), dioleoylphosphatidyl serine (DOPS), dipalmitoylphosphatidylserine (DPPS), didecanoylphosphatidylserine, and distearoylphosphatidylserine (DSPS).
- DLPS didodecanoylphosphatidylserine
- DOPS dioleoylphosphatidyl serine
- DPPS dipalmitoylphosphatidylserine
- DSPS distearoylphosphatidylserine
- diacylphosphatidic acids include dierucoylphosphatidic acid (DEPA), dilauroylphosphatidic acid (also known as didodecanoylphosphatidic acid) (DLPA), dimyristoylphosphatidic acid (DMPA), dioleoylphosphatidic acid (DOPA), dipalmitoylphosphatidic acid (DPPA), didecanoylphosphatidic acid, and distearoylphosphatidic acid (DSPA).
- DEPA dierucoylphosphatidic acid
- DLPA dilauroylphosphatidic acid
- DMPA dimyristoylphosphatidic acid
- DOPA dioleoylphosphatidic acid
- DPPA dipalmitoylphosphatidic acid
- DSPA distearoylphosphatidic acid
- Representative phospholipids include phosphosphingolipids such as ceramide phosphoryllipid, ceramide phosphorylcholine, and ceramide phosphorylethanolamine.
- the nanoparticle of the invention includes two or more different phospholipids.
- the nanoparticle includes two different phospholipids. In other embodiments, the nanoparticle includes three different phospholipids. In further embodiments, the nanoparticle includes four different phospholipids. In certain embodiments, the nanoparticle of the invention further includes (e.g., cholesterol).
- the phospholipid diacylpho spholipid include diacylphosphatidylcholines, diacylphosphatidylethanolamines, diacylphosphatidylglycerols, diacylphosphatidylserines, diacylphosphatidylinositols, and diacylphosphatidic acids.
- the diacylphospholipid (e.g., phosphatidylcholine) has a fatty acid component (acyl groups) having from 10 to 22 carbons (e.g., 10, 12, 14, 16, 18, 20, 22 carbons). In certain embodiments, the diacylphospholipid has a fatty acid component having from 10 to 20 carbons (e.g., 10, 12, 14, 16, 18, 20 carbons). In other embodiments, the diacylphospholipid has a fatty acid component having from 10 to 16 carbons (e.g., 10, 12, 14, 16 carbons). In further embodiments, the diacylphospholipid has a fatty acid component having from 10 to 14 carbons (e.g., 10, 12, 14 carbons).
- acyl groups having from 10 to 22 carbons (e.g., 10, 12, 14, 16, 18, 20, 22 carbons). In certain embodiments, the diacylphospholipid has a fatty acid component having from 10 to 20 carbons (e.g., 10, 12, 14, 16, 18, 20 carbons). In other embodiments, the diacylphospholipid has a
- the diacylphospholipid has a fatty acid component having from 10 to 12 carbons (e.g., 10, 12 carbons). In certain embodiments, the diacylphospholipid has a fatty acid component having 10 carbons. It will be appreciated that in certain of the embodiments noted above, each of the fatty acid components in the diacylphospholipid has the same number of carbons (e.g., 10, 12, 14, 16, 18, 20, 22 carbons), such as 1,2-didecanoylphosphatidylcholine, and that in other of the embodiments noted above, each of the fatty acid components in the diacylphospholipid has a different number of carbons, such as stearoyloleoylphosphatidylcholine.
- the phospholipid is a phosphatidylcholine.
- Suitable phosphatidylcholines include phosphatidylcholines having a fatty acid component (acyl groups) having from 10 to 22 carbons (e.g., 10, 12, 14, 16, 18, 20, 22 carbons).
- the phosphatidylcholine has a fatty acid component having from 10 to 20 carbons (e.g., 10, 14, 16, 18, 20 carbons).
- the phosphatidylcholine has a fatty acid component having from 10 to 16 carbons (e.g., 10, 12, 14, 16 carbons).
- the phosphatidylcholine has a fatty acid component having from 10 to 14 carbons (e.g., 10, 12, 14 carbons). In yet other embodiments, the phosphatidylcholine has a fatty acid component having from 10 to 12 carbons (e.g., 10, 12 carbons). In certain embodiments, the phosphatidylcholine has a fatty acid component having 10 carbons.
- Representative phosphatidylcholines include those illustrated in FIGURE 2 (e.g., PC-12, PC-14, PC-16, PC-18, PC-20) and PC-10 (not shown). It will be appreciated that the fatty acid component of a particular phospholipid need not be the same (i.e., diacyl with different acyl groups).
- the phospholipid is an electronically neutral phospholipid having, for example, a negatively charged phosphate group and a positively charged amine group (e.g., a phosphatidylcholine or phosphatidylethanolamine).
- the phospholipid is an electronically negative phospholipid having a negatively charged phosphate group (e.g., a phosphatidylglycerol).
- the phospholipid is a lysophospholipid.
- the lysophospholipid is a mono-acylphospholipid.
- Representative lysophospholipids include lysophosphatidylcholines, lysophosphatidylethanolamines, lysophosphatidylglycerols, lysophosphatidylserines, lysophosphatidylinositols, and lysophosphatidic acids (e.g., mono-acylphosphatidyl compounds).
- the mono-acylphospholipid in certain embodiments, the mono-acylphospholipid
- the mono-acylphospholipid has a fatty acid component (acyl group) having from 10 to 22 carbons (e.g., 10, 12, 14, 16, 18, 20, 22 carbons).
- the mono- acylphospholipid has a fatty acid component having from 10 to 20 carbons (e.g., 10, 12, 14, 16, 18, 20 carbons).
- the mono-acylphospholipid has a fatty acid component having from 10 to 16 carbons (e.g., 10, 12, 14, 16 carbons).
- the mono-acylphospholipid has a fatty acid component having from 10 to 14 carbons (e.g., 10, 12, 14 carbons).
- the mono-acylphospholipid has a fatty acid component having from 10 to 12 carbons (e.g., 10, 12 carbons).
- the mono-acylphospholipid has a fatty acid component having 10 carbons.
- the phospholipid is a lysophosphatidylcholine.
- Suitable lysophosphatidylcholines include lysophosphatidylcholines having a fatty acid component (acyl group) having from 10 to 22 carbons (e.g., 10, 12, 14, 16, 18, 20, 22 carbons).
- the phosphatidylcholine has a fatty acid component having from 10 to 20 carbons (e.g., 10, 14, 16, 18, 20 carbons).
- the lysophosphatidylcholine has a fatty acid component having from 10 to 16 carbons (e.g., 10, 12, 14, 16 carbons).
- the lysophosphatidylcholine has a fatty acid component having from 10 to 14 carbons (e.g., 10, 12, 14 carbons). In yet other embodiments, the lysophosphatidylcholine has a fatty acid component having from 10 to 12 carbons (e.g., 10, 12 carbons). In certain embodiments, the lysophosphatidylcholine has a fatty acid component having 10 carbons.
- Representative lysophosphatidylcholines include those illustrated in FIGURE 2 (e.g., lyso-PC-12, lyso-PC-14, lyso-PC-16, lyso-PC-20) and lyso-PC-10.
- the lysophospholipid is an electronically neutral lysophospholipid having, for example, a negatively charged phosphate group and a positively charged amine group (e.g., a lysophosphatidylcholine or lysophosphatidylethanolamine).
- the lysophospholipid is an electronically negative lysophospholipid having a negatively charged phosphate group (e.g., a lysophosphatidylglycerol).
- the nanoparticle of the invention includes a diacylphospholipid and a mono-acylphospholipid. In certain of these embodiments, the nanoparticle of the invention includes a phosphatidylcholine and a lysophosphatidylcholine.
- the ratio of di- to mono-acylphospholipid is from about 1:99 w/w percent to about 99: 1 w/w percent. In certain embodiments, the ratio of di- to mono-acylphospholipid (e.g., phosphatidylcholine to lysophosphatidylcholine) is about 10:90 to about 90: 10 w/w percent. In other embodiments, the ratio of di- to mono-acylphospholipid (e.g., phosphatidylcholine to lysophosphatidylcholine) is about 20:80 to about 80:20 w/w percent.
- the ratio of di- to mono-acylphospholipid is about 30:70 to about 70:30 w/w percent. In other embodiments, the ratio of di- to mono-acylphospholipid (e.g., phosphatidylcholine to lysophosphatidylcholine) is about 40:60 to about 60:40 w/w percent. In certain embodiments, the ratio of di- to mono-acylphospholipid (e.g., phosphatidylcholine to lysophosphatidylcholine) is about 50:50 w/w percent.
- the ratio of di- to mono-acylphospholipid is from about 90: 10 to about 60:40 w/w percent. In other embodiments, the ratio of di- to mono-acylphospholipid (e.g., phosphatidylcholine to lysophosphatidylcholine) is from about 90: 10 to about 70:30 w/w percent. In further embodiments, the ratio of di- to mono-acylphospholipid (e.g., phosphatidylcholine to lysophosphatidylcholine) is about 80:20 w/w percent.
- the fatty acid components of the di- and mono-acylphospholipids are the same.
- each of the di- and mono-acylphospholipids includes CIO (decanoyl) fatty acid components, each includes C12 (dodecanoyl) fatty acid components, each includes C14 (tetradecanoyl) fatty acid components, each includes C16 (hexadecanoyl) fatty acid components, or each includes C18 (dodecanoyl) fatty acid components.
- the fatty acid components of the di- and mono-acylphospholipids are different (e.g., the diacylphospholipid includes CIO fatty acid components and the mono-acylphospholipid includes a C12 fatty acid component.
- the phospholipid and therapeutic agent in the composition can be associated in various manners.
- the phospholipid is in admixture with the therapeutic agent.
- the phospholipid encapsulates or entraps the therapeutic agent.
- the phospholipid is bound (e.g., non-covalently bound) to the therapeutic agent.
- the nanoparticles of the invention have an average or mean diameter of no greater than about any of about 1000, 900, 800, 700, 600, 500, 400, 300, 200, or 100 nm. In some embodiments, the average or mean diameter of the particles is between about 30-300 nm. In some embodiments, the average or mean diameter of the particles is between about 20-200 nm. In some embodiments, the average or mean diameter of the particles is between about 80-200 nm. In certain embodiments, the average or mean diameter of the particles is between about 30-180 nm. In some embodiments, the average or mean diameter of the particles is between about 40-160 nm. In certain embodiments, the average or mean diameter of the particles is between about 80-140 nm. In other embodiments, the average or mean diameter of the particles is between about 90-120 nm. In some embodiments, the particles are sterile-filterable.
- the nanoparticle can be electronically neutral or charged.
- the nanoparticle when the nanoparticle includes only phospholipids (e.g., di- and/or mono-acylphospholipids) that are electronically neutral (e.g., a phosphatidylcholine, lysophosphatidylcholine, phosphatidylethanolamine, and/or lyso phosphatidylethanolamine, each having a negatively charged phosphate group and a positively charged amine group), the nanoparticle is electronically neutral, at least in regard to the nanoparticle's phospholipid component.
- phospholipids e.g., di- and/or mono-acylphospholipids
- the nanoparticle is electronically neutral, at least in regard to the nanoparticle's phospholipid component.
- the nanoparticle when the nanoparticle includes a phospholipid (e.g., di- and/or mono-acylphospholipid) that is negatively charged (e.g., a phosphatidylglycerol having a negatively charged phosphate group and no corresponding positively charged group), the nanoparticle is electronically negative, at least in regard to the nanoparticle's phospholipid component.
- a phospholipid e.g., di- and/or mono-acylphospholipid
- negatively charged e.g., a phosphatidylglycerol having a negatively charged phosphate group and no corresponding positively charged group
- the nanoparticle is electronically neutral in regard to the nanoparticle's phospholipid content. In other embodiments, the nanoparticle is electronically negative (negatively charged) in regard to the nanoparticle's phospholipid content.
- the nanoparticle loaded with a therapeutic agent is electronically neutral.
- the nanoparticle has an absolute value of the zeta potential between 0 and 30 mV, between 0 and 20 mV, between 0 and 10 mV, or between 0 and 5 mV.
- Representative nanoparticles of the invention demonstrate pharmacokinetic bioequivalence to Abraxane® with large volume of distribution, low AUC, and low Cmax in comparison to solvent-based paclitaxel formulations, such as Taxol® or Tocosol®.
- Cynviloq® provides the desired pharmacokinetic bioequivalence to Abraxane®, but suffers from undesirable hypersensitivity to its excipient/polymer. This prompted the replacement of mPEG-PDLLA in Cynviloq® with naturally-occurring phospholipids.
- the invention provides a phospholipid-coated therapeutic agent nanoparticle that includes a particulate therapeutic agent coated with one or more phospholipids.
- the phospholipid nanoparticle of the invention and formulations that include the nanoparticles are advantageous for several reasons.
- the nanoparticle of the invention provides the desirable benefits of stable particle size and therapeutic agent loading.
- Representative particles of the invention have an average diameter (Z av ) between from about 20-200 nm to about 90-120 nm.
- FIGURE 3 illustrates the size and size distribution of a representative paclitaxel particle coated with a combination of di- and mono-acylphospholipids. These particles have an average diameter of about 100 nm with a polydispersity index of about 0.1.
- therapeutic agent entrapment efficiency (drug loading) and particle size are correlated and optimized for particles with di- to mono-acylphospholipid ratio from about 90: 10 to about 70:30.
- Particle size, therapeutic agent (paclitaxel) content (entrapment efficiency %), and phospholipid composition for representative nanoparticles of the invention are summarized in Table 2, Table 3, and Table 4 (FIGURE 7).
- optimized therapeutic agent entrapment efficiency is observed for nanoparticles of the invention having an average diameter from about 90-120 nm (e.g., about 100 nm), a polydispersity index of about 0.1, and having a phospholipid composition that is a combination of di- and mono-acylphospholipids in the ratio of from about 90: 10 to about 70:30 (e.g., about 80:20 didodecanoylphosphatidylcholine: didodecanoyllysophosphatidylcholine).
- the selection of phospholipids effective to provide optimized nanoparticles was made based on therapeutic agent loading, particle size and size stability, and the therapeutic agent release profile [effective release/particle dissolution under physiological conditions (plasma) and stability under administration conditions (PBS or DI)].
- the selection of phospholipids was not made based on solubility of the therapeutic agent in the phospholipid.
- Therapeutic agent (paclitaxel) loading as a function of phospholipid fatty acid component carbon number (C8-C20) is shown in FIGURE 13.
- Optimum loading was observed for phospholipids having a fatty acid component carbon number (C10-C14) (e.g., di- and monoacylphospholipids having fatty acid components having from 10 to 14 carbons, such as phosphatidylcholines and lysophosphatidylcholines).
- Advantageous size and size stability for representative nanoparticles was demonstrated as shown in FIGURES 9 and IOC (see DI and PBS traces).
- Representative nanoparticles of the invention demonstrate therapeutic agent release (particle dissolution) profiles that combine the desirable properties of clinically effective formulations: Abraxane® and Genexol-PM® (Cynviloq®).
- Abraxane® is a nanoparticle coated with human serum albumin
- Genexol-PM® is a nanoparticle in the form of a synthetic polymeric micelle.
- Abraxane® provides desirable plasma instability (drug release), but suffers from undesirable instability in delivery vehicles (e.g., PBS) (see FIGURE 10A).
- Genexol-PM® provides desirable stability in delivery vehicles and desirable instability in plasma (see FIGURE 10B).
- Representative phospholipid-coated nanoparticles of the invention advantageously demonstrate stability in delivery vehicles (aqueous vehicles for intravenous, intravesicle, and intraperitoneal administration, such as aqueous buffers (saline), dextrose solutions, and deionized water useful in solutions for injection) and desirable plasma instability for therapeutic agent release in plasma (see FIGURE IOC).
- aqueous vehicles for intravenous, intravesicle, and intraperitoneal administration such as aqueous buffers (saline), dextrose solutions, and deionized water useful in solutions for injection
- plasma instability for therapeutic agent release in plasma see FIGURE IOC
- the nanoparticles of the invention are not negatively charged.
- neither the nanoparticles nor the nanoparticle compositions of the invention include PEG-based cryoprotectants (e.g., PEG-6000).
- nanoparticles noted above are readily formulated in delivery vehicles effective for therapeutic administration. These formulations advantageously demonstrate particle size stability. Particle size stability can be an important factor for therapeutic administration of nanoparticles.
- the nanoparticles of the invention are provided as a lyophilized powder, the nanoparticles are subsequently reconstituted in an aqueous delivery vehicle prior (e.g., immediately prior) to administration to the subject. Reconstitution of nanoparticles in the aqueous vehicle, optionally followed by filtration (0.2 ⁇ ), provides a formulation that can be subject to particle size instability (e.g., particle aggregation, particle dissolution, therapeutic agent release).
- particle size of representative nanoparticles of the invention can be stabilized by suitable additives (e.g., particle size stabilizers, such as trehalose, for example, about 5% w/w trehalose).
- these formulations of the invention include a particle size stabilizer.
- Representative particle size stabilizers include buffering agents to control pH, surfactants to inhibit protein adsorption to interfaces, preservatives to prevent microbial growth, carbohydrates as bulking agents for lyophilization, polymers to increase solution viscosity, and salts or sugars to stabilize proteins and to obtain physiological tonicity and osmolality. These can be used in the formulations at concentrations from about 1-15% w/w based on the total weight of the formulation.
- the nanoparticles of the invention comprise the components described herein.
- the nanoparticles of the invention consist essentially of the components described herein, and that in these embodiments the nanoparticles do not include any additional component that would material affect the properties of the nanoparticle (e.g., therapeutic function, effect, or other pharmacokinetic properties).
- the nanoparticles of the invention consist of the components described herein, and that in these embodiments the nanoparticles do not include any additional components.
- compositions include dry and liquid compositions.
- the composition comprises a dry (e.g., lyophilized) composition.
- the composition is a liquid (e.g., aqueous) composition obtained by reconstituting or resuspending a dry composition.
- the composition is an intermediate liquid (e.g., aqueous) composition that can be dried (e.g., lyophilized).
- Dry compositions of the invention can be reconstituted, resuspended, or rehydrated to form generally a stable aqueous suspension of particles comprising the therapeutic agent and phospholipid (e.g., phospholipid-coated therapeutic agent).
- a hydrophobic therapeutic agent is "stabilized" by a phospholipid in an aqueous suspension if it remains suspended in an aqueous medium (e.g., without visible precipitation or sedimentation) for an extended period of time, such as for at least about any of 0.1, 0.2, 0.25, 0.5, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 24, 36, 48, 60, or 72 hours.
- the suspension is generally, but not necessarily, suitable for administration to a subject (e.g., human).
- the stability of the suspension is in some embodiments evaluated at room temperature (e.g., 20-25 °C) or refrigerated conditions (e.g., 4 °C). Stability can also be evaluated under accelerated testing conditions, such as at a temperature that is higher than about 40 °C.
- the composition is a liquid (e.g., aqueous) composition obtained by reconstituting or resuspending a dry composition in a biocompatible medium.
- suitable biocompatible media include, but are not limited to, water, buffered aqueous media, saline, buffered saline, optionally buffered solutions of amino acids, optionally buffered solutions of proteins, optionally buffered solutions of sugars, optionally buffered solutions of vitamins, optionally buffered solutions of synthetic polymers, lipid-containing emulsions, and the like.
- the amount of phospholipid in the composition described herein will vary depending on the therapeutic agent and other components in the composition.
- the composition comprises a phospholipid in an amount that is sufficient to stabilize the therapeutic carrier in an aqueous suspension, for example, in the form of a stable colloidal suspension (e.g., a stable suspension of nanoparticles).
- the phospholipid is in an amount that reduces the sedimentation rate of the therapeutic agent in an aqueous medium.
- the amount of the phospholipid also depends on the size and density of particles of the therapeutic agent.
- the phospholipid is present in an amount that is sufficient to stabilize the therapeutic agent in an aqueous suspension at a certain concentration.
- concentration of the therapeutic agent in the composition is about 0.1 to about 100 mg/ml, including, for example, any of about 0.1 to about 50 mg/ml, about 0.1 to about 20 mg/ml, about 1 to about 10 mg/ml, about 2 to about 8 mg/ml, and about 4 to about 6 mg/ml.
- the concentration of the therapeutic agent is at least about any of about 1.3 mg/ml, 1.5 mg/ml, 2 mg/ml, 3 mg/ml, 4 mg/ml, 5 mg/ml, 6 mg/ml, 7 mg/ml, 8 mg/ml, 9 mg/ml, 10 mg/ml, 15 mg/ml, 20 mg/ml, 25 mg/ml, 30 mg/ml, 40 mg/ml, and 50 mg/ml.
- the phospholipid is present in an amount that avoids use of surfactants (such as Tween 80 or Cremophor or other biocompatible polymers).
- compositions of the invention are advantageously free or substantially free of surfactants (such as Tween 80 and Cremophor) and other biocompatible polymers (e.g., serum albumins, such as human serum albumin, and synthetic polymers such as poly(alkylene oxide)-containing polymers as described in U.S. Patent No. 6,322,805).
- surfactants such as Tween 80 and Cremophor
- other biocompatible polymers e.g., serum albumins, such as human serum albumin, and synthetic polymers such as poly(alkylene oxide)-containing polymers as described in U.S. Patent No. 6,322,805).
- the composition, in liquid form comprises from about 0.1% to about 50% (w/v) (e.g., about 0.5% (w/v), about 5% (w/v), about 10% (w/v), about 15% (w/v), about 20% (w/v), about 30% (w/v), about 40% (w/v), about 50% (w/v)) of the phospholipid. In some embodiments, the composition, in liquid form, comprises about 0.5% to about 5% (w/v) of the phospholipid.
- the weight ratio of phospholipid to the therapeutic agent is such that a sufficient amount of the therapeutic agent binds to, or is transported by, the cell. While the weight ratio of phospholipid to therapeutic agent can be optimized for different phospholipid and therapeutic agent combinations, generally the weight ratio of phospholipid to therapeutic agent (w/w) is about 0.01: 1 to about 100: 1, including for example any of about 0.02: 1 to about 50: 1, about 0.05: 1 to about 20: 1, about 0.1: 1 to about 20: 1, about 1: 1 to about 18: 1, about 2: 1 to about 15: 1, about 3: 1 to about 12: 1, about 4: 1 to about 10: 1, about 5: 1 to about 9: 1, and about 9: 1.
- the phospholipid to therapeutic agent weight ratio is about any of 18: 1 or less, such as about any of 15: 1 or less, 14: 1 or less, 13: 1 or less, 12: 1 or less, 11: 1 or less, 10: 1 or less, 9: 1 or less, 8: 1 or less, 7: 1 or less, 6: 1 or less, 5: 1 or less, 4: 1 or less, and 3: 1 or less.
- the phospholipid allows the composition to be administered to a subject (e.g., human) without significant side effects.
- the phospholipid is in an amount that is effective to reduce one or more side effects of administration of the therapeutic agent to a human.
- reducing one or more side effects of administration of the therapeutic agent refers to reduction, alleviation, elimination, or avoidance of one or more undesirable effects caused by the therapeutic agent, as well as side effects caused by delivery vehicles (such as solvents that render the therapeutic suitable for injection) used to deliver the therapeutic agent.
- Such side effects include, for example, myelosuppression, neurotoxicity, hypersensitivity, inflammation, venous irritation, phlebitis, pain, skin irritation, peripheral neuropathy, neutropenic fever, anaphylactic reaction, venous thrombosis, extravasation, and combinations thereof.
- side effects are merely exemplary and other side effects, or combination of side effects, associated with various therapeutic agents can be reduced.
- compositions described herein can include other agents, excipients, or stabilizers to improve properties of the composition.
- suitable excipients and diluents include, but are not limited to, lactose, dextrose, sucrose, sorbitol, mannitol, starches, gum acacia, calcium phosphate, alginates, tragacanth, gelatin, calcium silicate, microcrystalline cellulose, polyvinylpyrrolidone, cellulose, water, saline solution, syrup, methylcellulose, methyl- and propylhydroxybenzoates, talc, magnesium stearate and mineral oil.
- the formulations can additionally include lubricating agents, wetting agents, emulsifying and suspending agents, preserving agents, sweetening agents or flavoring agents.
- emulsifying agents include tocopherol esters such as tocopheryl polyethylene glycol succinate and the like, Pluronic, emulsifiers based on polyoxyethylene compounds, Span 80 and related compounds, and other emulsifiers known in the art and approved for use in animals or human dosage forms.
- the compositions can be formulated so as to provide rapid, sustained or delayed release of the active ingredient after administration to the patient by employing procedures well known in the art.
- compositions for administration by injection include those comprising a therapeutic agent as the active ingredient in association with a surface-active agent (or wetting agent or surfactant), or in the form of an emulsion (e.g., as a water-in-oil or oil-in- water emulsion).
- a surface-active agent or wetting agent or surfactant
- emulsion e.g., as a water-in-oil or oil-in- water emulsion.
- Other ingredients can be added, for example, mannitol or other pharmaceutically acceptable vehicles, if necessary.
- the composition is suitable for administration to a human.
- the composition is suitable for administration to a mammal, such as, in the veterinary context, including domestic pets and agricultural animals.
- the following formulations and methods are merely exemplary and are in no way limiting.
- Formulations suitable for oral administration can consist of (a) liquid solutions, such as an effective amount of the compound dissolved in diluents, such as water, saline, or orange juice, (b) capsules, sachets or tablets, each containing a predetermined amount of the active ingredient, as solids or granules, (c) suspensions in an appropriate liquid, (d) suitable emulsions, and (e) powders.
- Tablet forms can include one or more of lactose, mannitol, corn starch, potato starch, microcrystalline cellulose, acacia, gelatin, colloidal silicon dioxide, croscarmellose sodium, talc, magnesium stearate, stearic acid, and other excipients, colorants, diluents, buffering agents, moistening agents, preservatives, flavoring agents, and pharmacologically compatible excipients.
- Lozenge forms can comprise the active ingredient in a flavor, usually sucrose and acacia or tragacanth, as well as pastilles comprising the active ingredient in an inert base, such as gelatin and glycerin, or sucrose and acacia, emulsions, gels, and the like containing, in addition to the active ingredient, such excipients as are known in the art.
- a flavor usually sucrose and acacia or tragacanth
- pastilles comprising the active ingredient in an inert base, such as gelatin and glycerin, or sucrose and acacia, emulsions, gels, and the like containing, in addition to the active ingredient, such excipients as are known in the art.
- Formulations suitable for parenteral administration include aqueous and non-aqueous, isotonic sterile injection solutions, which can contain anti-oxidants, buffers, bacteriostats, and solutes that render the formulation compatible with the blood of the intended recipient, and aqueous and non-aqueous sterile suspensions that can include suspending agents, solubilizers, thickening agents, stabilizers, and preservatives.
- the formulations can be presented in unit-dose or multi-dose sealed containers, such as ampules and vials, and can be stored in a freeze-dried (lyophilized) condition requiring only the addition of the sterile liquid excipient, for example, water, for injections, immediately prior to use.
- the composition is formulated to have a pH in the range of about 4.5 to about 9.0, including for example pH in the ranges of any of about 5.0 to about 8.0, about 6.5 to about 7.5, and about 6.5 to about 7.0.
- the pH of the composition is formulated to no less than about 6, including for example no less than about any of 6.5, 7, or 8 (such as about 7.5 or about 8).
- the composition can also be made to be isotonic with blood by the addition of a suitable tonicity modifier, such as glycerol.
- compositions of the invention comprise the components described herein (e.g., may include other component such as described below).
- the compositions of the invention consist essentially of the components described herein, and that in these embodiments the compositions do not include any additional component that would material affect the properties of the nanoparticle (e.g., therapeutic function, effect, or other pharmacokinetic properties).
- the compositions of the invention consist of the components described herein, and that in these embodiments the compositions do not include any additional components.
- the invention provides articles of manufacture comprising the compositions described herein in suitable packaging.
- suitable packaging for compositions described herein are known in the art, and include, for example, vials (such as sealed vials), vessels (such as sealed vessels), ampules, bottles, jars, flexible packaging (such as sealed Mylar or plastic bags), and the like. These articles of manufacture may further be sterilized and/or sealed.
- unit dosage forms comprising the compositions described herein. These unit dosage forms can be stored in a suitable packaging in single or multiple unit dosages and may also be further sterilized and sealed.
- kits comprising compositions (or unit dosages forms and/or articles of manufacture) described herein and may further comprise instruction(s) on methods of using the composition, such as uses further described herein.
- the kit of the invention comprises the packaging described above.
- the kit of the invention comprises the packaging described above and a second packaging comprising a buffer. It may further include other materials desirable from a commercial and user standpoint, including other buffers, diluents, filters, needles, syringes, and package inserts with instructions for performing any methods described herein.
- Kits may also be provided that contain sufficient dosages of the therapeutic agent as disclosed herein to provide effective treatment for an individual for an extended period, such as any of a week, 2 weeks, 3 weeks, 4 weeks, 6 weeks, 8 weeks, 3 months, 4 months, 5 months, 6 months, 7 months, 8 months, 9 months or more. Kits may also include multiple unit doses of the therapeutic agent and pharmaceutical compositions and instructions for use and packaged in quantities sufficient for storage and use in pharmacies, for example, hospital pharmacies and compounding pharmacies.
- the invention provides methods for using the phospholipid- coated therapeutic agent nanoparticles.
- the invention provides a method for treating a disease or condition that is responsive to a therapeutic agent comprising administering a composition comprising an effective amount of the phospholipid-coated therapeutic agent nanoparticle.
- a method of treating cancer in an individual comprising administering to the individual a composition comprising an effective amount of a antineoplastic therapeutic agent (such as paclitaxel) and a phospholipid protein.
- an effective amount refers to an amount of a compound or composition sufficient to treat a specified disorder, condition or disease such as ameliorate, palliate, lessen, and/or delay one or more of its symptoms.
- an effective amount comprises an amount sufficient to cause a tumor to shrink and/or to decrease the growth rate of the tumor (such as to suppress tumor growth).
- an effective amount is an amount sufficient to delay development.
- an effective amount is an amount sufficient to prevent occurrence and/or recurrence.
- An effective amount can be administered in one or more administrations.
- compositions of the invention are effective for treating proliferative diseases including cancers, restenosis, and fibrosis, among others.
- the therapeutic agent is paclitaxel
- the compositions are effective for treating diseases and conditions treatable by administering paclitaxel.
- Cancers to be treated by compositions described herein include, but are not limited to, carcinoma, lymphoma, blastoma, sarcoma, and leukemia.
- cancers that can be treated by compositions described herein include, but are not limited to, squamous cell cancer, lung cancer (including small cell lung cancer, non-small cell lung cancer, adenocarcinoma of the lung, and squamous carcinoma of the lung), cancer of the peritoneum, hepatocellular cancer, gastric or stomach cancer (including gastrointestinal cancer), pancreatic cancer, glioblastoma, cervical cancer, ovarian cancer, liver cancer, bladder cancer, hepatoma, breast cancer, colon cancer, melanoma, endometrial or uterine carcinoma, salivary gland carcinoma, kidney or renal cancer, liver cancer, prostate cancer, vulval cancer, thyroid cancer, hepatic carcinoma, head and neck cancer, colorectal cancer, rectal cancer, soft-tissue sarcoma, Kaposi's sar
- metastatic cancer that is, cancer that has metastasized from the primary tumor.
- a method of reducing cell proliferation and/or cell migration there is provided a method of treating hyperplasia.
- the cancer is lung cancer, including, for example, non-small cell lung cancer (NSCLC, such as advanced NSCLC), small cell lung cancer (SCLC, such as advanced SCLC), and advanced solid tumor malignancy in the lung.
- NSCLC non-small cell lung cancer
- SCLC small cell lung cancer
- advanced solid tumor malignancy in the lung is ovarian cancer, head and neck cancer, gastric malignancies, melanoma (including metastatic melanoma), colorectal cancer, pancreatic cancer, and solid tumors (such as advanced solid tumors).
- the cancer is any of (and in some embodiments selected from the group consisting of) breast cancer, colorectal cancer, rectal cancer, non-small cell lung cancer, non-Hodgkins lymphoma (NHL), renal cell cancer, prostate cancer, liver cancer, pancreatic cancer, soft-tissue sarcoma, Kaposi's sarcoma, carcinoid carcinoma, head and neck cancer, melanoma, ovarian cancer, mesothelioma, gliomas, glioblastomas, neuroblastomas, and multiple myeloma.
- the cancer is a solid tumor.
- the cancer is any of (in some embodiments, selected from the group consisting of) prostate cancer, colon cancer, breast cancer, head and neck cancer, pancreatic cancer, lung cancer, and ovarian cancer.
- compositions suitable for receiving these compositions depend on the nature of the therapeutic agent, as well as the disease/condition/disorder to be treated and/or prevented. Accordingly, the terms “individual” and “subject” include any of vertebrates, mammals, and humans depending on intended suitable use. In some embodiments, the individual is a mammal. In some embodiments, the individual is any one or more of human, bovine, equine, feline, canine, rodent, or primate. In some embodiments, the individual is a human.
- the invention provides a method of treating carcinoma
- the method comprises administering to the individual a composition comprising an effective amount of phospholipid-coated therapeutic agent nanoparticle.
- compositions described herein can be administered alone or in combination with other pharmaceutical agents, including poorly water soluble pharmaceutical agents.
- a taxane such as paclitaxel
- it can be co-administered with one or more other chemotherapeutic agents including, but are not limited to, carboplatin, Navelbine (vinorelbine), anthracycline (Doxil), lapatinib (GW57016), Herceptin, gemcitabine (Gemzar), capecitabine (Xeloda), alimta, cisplatin, 5-fluorouracil, epirubicin, cyclophosphamide, avastin, Velcade.
- chemotherapeutic agents including, but are not limited to, carboplatin, Navelbine (vinorelbine), anthracycline (Doxil), lapatinib (GW57016), Herceptin, gemcitabine (Gemzar), capecitabine (Xeloda), alimt
- the taxane composition is co-administered with a chemotherapeutic agent selected from the group consisting of antimetabolites (including nucleoside analogs), platinum-based agents, alkylating agents, tyrosine kinase inhibitors, anthracycline antibiotics, vinca alkloids, proteasome inhibitors, macrolides, and topoisomerase inhibitors.
- chemotherapeutic agent selected from the group consisting of antimetabolites (including nucleoside analogs), platinum-based agents, alkylating agents, tyrosine kinase inhibitors, anthracycline antibiotics, vinca alkloids, proteasome inhibitors, macrolides, and topoisomerase inhibitors.
- chemotherapeutic agent selected from the group consisting of antimetabolites (including nucleoside analogs), platinum-based agents, alkylating agents, tyrosine kinase inhibitors, anthracycline antibiotics, vinca alkloids, prote
- the dose of the composition of the invention administered to an individual will vary with the particular composition, the method of administration, and the particular disease being treated.
- the dose is sufficient to effect a desirable response, such as a therapeutic or prophylactic response against a particular disease or condition.
- the dosage of representative therapeutic agents (e.g., paclitaxel) administered can be about 1 to about 300 mg/m 2 , including for example about 10 to about 300 mg/m 2 , about 30 to about 200 mg/m 2 , and about 70 to about 150 mg/m 2 .
- the dosage of a therapeutic agent (e.g., paclitaxel) in the composition can be in the range of about 50 to about 200 mg/m 2 when given on a 3 week schedule, or about 10 to about 100 mg/m 2 when given on a weekly schedule.
- the dosage may be in the range of about 1-50 mg/m 2 .
- Dosing frequency for the compositions of the invention includes, but is not limited to, at least about any of once every three weeks, once every two weeks, once a week, twice a week, three times a week, four times a week, five times a week, six times a week, or daily.
- the interval between each administration is less than about a week, such as less than about any of 6, 5, 4, 3, 2, or 1 day.
- the interval between each administration is constant.
- the administration can be carried out daily, every two days, every three days, every four days, every five days, or weekly.
- the administration can be carried out twice daily, three times daily, or more frequent.
- compositions of the invention can be extended over an extended period of time, such as from about a month up to about three years.
- the dosing can be extended over a period of any of about 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 18, 24, 30, and 36 months.
- the interval between each administration is no more than about a week.
- compositions described herein can be administered to an individual via various routes, including, for example, intravenous, intra-arterial, intraperitoneal, intrapulmonary, oral, inhalation, intravesicular, intramuscular, intra-tracheal, subcutaneous, intraocular, intrathecal, transmucosal, and transdermal.
- the compositions are administered by any acceptable route including, but not limited to, orally, intramuscularly, transdermally, and intravenously.
- the continuous phase preferably comprises an aqueous solution of tonicity modifiers, buffered to a pH range of about 5 to about 8.5.
- the pH may also be below 7 or below 6.
- the pH of the composition is no less than about 6, including for example no less than about any of 6.5, 7, or 8 (such as about 7.5 or 8).
- the nanoparticles of this invention can be enclosed in a hard or soft capsule, can be compressed into tablets, or can be incorporated with beverages or food or otherwise incorporated into the diet.
- Capsules can be formulated by mixing the nanoparticles with an inert pharmaceutical diluent and inserting the mixture into a hard gelatin capsule of the appropriate size. If soft capsules are desired, a slurry of the nanoparticles with an acceptable vegetable oil, light petroleum or other inert oil can be encapsulated by machine into a gelatin capsule.
- the invention provides methods of reducing side effects associated with administration of a therapeutic agent to a human, comprising administering to a human a pharmaceutical composition comprising the phospholipid- coated therapeutic agent nanoparticle.
- the invention provides methods of reducing various side effects associated with administration of the therapeutic agent, including, but not limited to, myelosuppression, neurotoxicity, hypersensitivity, inflammation, venous irritation, phlebitis, pain, skin irritation, peripheral neuropathy, neutropenic fever, anaphylactic reaction, hematologic toxicity, and cerebral or neurologic toxicity, and combinations thereof.
- a method of reducing hypersensitivity reactions associated with administration of the therapeutic agent including, for example, severe skin rashes, hives, flushing, dyspnea, tachycardia, and others.
- the invention provides methods for making the phospholipid- coated therapeutic agent nanoparticles.
- the methods for the formation of nanoparticles of the invention include preparation under conditions of high shear forces (e.g., sonication, high pressure homogenization, or the like). Representative methods for forming nanoparticles under high shear force conditions are described in U.S. Patent Nos. 5,916,596; 6,506,405; and 6,537,579, incorporated herein by reference.
- the therapeutic agent is dissolved in an organic solvent to provide a solution that is combined with an aqueous phospholipid solution to provide a mixture.
- the mixture is subjected to high pressure homogenization.
- Post- homogenization to the desired level the organic solvent is removed by evaporation to provide an aqueous dispersion.
- the dispersion obtained can be further lyophilized to provide a particulate solid.
- Suitable organic solvents include solvents in which the therapeutic agent is soluble, that are miscible with aqueous solution, and that can be removed by evaporation at reasonable temperature and pressure.
- Representative useful solvents include ketones, esters, ethers, chlorinated solvents, and other solvents known in the art.
- the organic solvent can be methylene chloride or chloroform/ethanol (for example, with a ratio of 1:9, 1:8, 1:7, 1:6, 1:5, 1:4, 1:3, 1:2, 1: 1, 2:1, 3: 1, 4: 1, 5: 1, 6: 1, 7: 1, 8: 1, or 9: 1).
- compositions can also be added to the composition.
- suitable pharmaceutically acceptable excipients include solutions, emulsions, or suspensions.
- emulsion or nanoparticle formulations may also be prepared.
- An emulsion is formed by homogenization under high pressure and high shear forces. Such homogenization is conveniently carried out in a high-pressure homogenizer, typically operated at pressures in the range of about 3,000 up to 30,000 psi. Preferably, such processes are carried out at pressures in the range of about 6,000 up to 25,000 psi.
- the resulting emulsion comprises very small nanodroplets of the non-aqueous solvent containing the dissolved therapeutic agent and very small nanodroplets of the phospholipid.
- Acceptable methods of homogenization include processes imparting high shear and cavitation such as, for example, high-pressure homogenization, high shear mixers, sonication, high shear impellers and the like.
- Colloidal systems prepared in accordance with the present invention can be further converted into powder form by removal of the water (e.g., lyophilization) at a suitable temperature-time profile.
- the lyophilized product e.g., particulate powder
- the lyophilized product is readily reconstituted by addition of water, saline or buffer, without the need to use conventional cryoprotectants such as mannitol, sucrose, glycine and the like. While not required, it is of course understood that conventional cryoprotectants can be added to the pharmaceutical compositions if so desired.
- the nanoparticles are prepared by microfluidization- solvent evaporation, as described in Example 1.
- the nanoparticles are prepared by thin-film hydration, as described in Example 2. Briefly, in this method, phospholipids and paclitaxel were dissolved in ethanol and subjected to rotary evaporation until a thin film was formed and all the solvents were evaporated. The film was then hydrated using deionized (DI) water to produce paclitaxel-loaded phospholipid nanoparticles.
- DI deionized
- the methods of the invention include methods of making pharmaceutical compositions comprising combining any of the compositions described herein with a pharmaceutically acceptable excipient.
- the invention provides use of the compositions described herein in the manufacture of a medicament.
- the pharmaceutical composition thereof described herein are also intended for use in the manufacture of a medicament for use in treatment of the conditions and, in accordance with the methods, described herein.
- the present invention provides a phospholipid-coated paclitaxel nanoparticle formulation that utilizes phospholipids rather than either a natural polymer (Abraxane ® ) or a chemical polymer (Cynviloq ® ) as the next generation Abraxane ® . See FIGURE 1.
- the nanoparticles were prepared by two methods: microfludization-solvent evaporation and thin film-hydration methods.
- the formulation parameters included the type of phospholipid, phospholipid fatty acid chain length, the combination of phospholipid and lysophospholipid, the saturated-unsaturated phospholipid ratio, and the drug-phospholipid ratio.
- the process parameters such as microfludization pressure, number of microfludization cycles, and temperature of water for hydration were studied and their impact on drug loading, particle size, and physical stability were evaluated.
- the short-term stability evaluation of nanoparticles prepared with different phospholipid ratios demonstrated that 4: 1 as the optimum phospholipid-lysophospholipid ratio to achieve a loading of more than 60% paclitaxel with particle size of approximately 200 nm.
- the nanoparticle size increased with an increase of carbon chain lengths in the fatty acid, but no significant trends were observed for drug loading with changes in microfluidization pressure or number of cycles.
- the optimization of phospholipid composition, phospholipid types and process parameters led to a physically stable paclitaxel-loaded phospholipid-coated nanoparticle formulation that maintains size, charge, and integrity during storage.
- the phospholipid-coated paclitaxel (PTX) nanoparticles include biodegradable and biocompatible components such as phospholipid (PL), lyso-phospholipid (lyso-PL), and cholesterol.
- PL phospholipid
- lyso-PL lyso-phospholipid
- cholesterol cholesterol
- PTX-NPs stabilized with the PLs Two distinct PLs and lyso-PLs with different chain lengths and with significant phase transition temperature differences between the lipid in the combination were used to prepare PTX-NPs stabilized with the PLs. Molecular structures of the lipids used for the studies are shown in FIGURE 2. The physical properties of the PLs and lyso-PLs are shown in Table 1. A series of combinations of PTX and lyso-PLs were investigated to develop a stable lipid-coated NP formulation for PTX. Table 1. Physical properties of phospholipids and lyso-phospholipids used for the preparation of PTX-NPs.
- Transition temp of the phosphatidylcholine (PC) increases with increase in length of carbon chain in the PC;
- CMC of lyso-PC is much higher than that of corresponding (same carbon chain length) PC.
- microfluidization-solvent evaporation method in general produced particles of smaller size than thin-film hydration method.
- PLs or lyso-PLs alone did not produce smaller particles of size about 200 nm in either method.
- Microfluidization- solvent evaporation method in general produced particles smaller than thin-film hydration method
- Combination of PL and lyso-PL produced smaller size particle of 200-300 nm by microfluidization-evaporation method
- Phospholipids or lyso-PLs alone did not produce smaller particles of size -200 nm in either methods. Effect of carbon chain length in PC and lyso-PC on PTX loading
- the particle size and entrapment efficiency of PTX in PC and lyso-PC combination by method 1 is shown in Table 3.
- the combination of PC- 12 and lyso-PC-12 produced smallest size particles with highest loading of PTX.
- the combination of phosphatidylcholine and cholesterol had very poor entrapment efficiency of PTX.
- PTX-NPs prepared in different combinations of PLs, lyso-PLs and cholesterol by microfluidization solvent evaporation method.
- the combination phosphocholine and cholesterol had very poor entrapment efficiency of PTX.
- FIGURE 3 is the particle size distribution graph by dynamic laser light scattering for the optimized formulation of PTX-NP formulation stabilized by combination of PC- 12 and lyso-PC-12. Referring to FIGURE 3, there are very few large particles in the unfiltered formulation. The formulation was easily filterable through 0.2 ⁇ filter and the filtered NP formulation of PTX has monomodal size distribution with a polydispersity index of 0.1. The Z av of the optimized formulation was about 100 nm.
- the number of extrusion cycles used in the preparation of lipid-coated PTX-NPs can affect drug loading depending upon the number of extrusion cycles.
- the effects of the number of extrusion cycles on particle size and entrapment efficiency are shown in FIGURE 4.
- the results are shown for the drug-lipid ratio of 1:5 and the PC-12-lyso- PC-12 of 80:20.
- the size of the NPs was unchanged with increasing number of extrusion cycles. There was significant increase in the entrapment of PTX up to twelve extrusion cycles.
- FIGURE 5 The effect of PC and lyso-PC ratio on PTX loading under similar conditions of preparation is shown in FIGURE 5.
- the maximum entrapment of PTX was obtained at the ratio of PC-12:lyso-PC-12 of 4: 1.
- the particle size was smaller with increasing amount of lyso-PC-12.
- the smaller size particles at higher concentration of lyso-PC-12 could be due to micellar particles of lyso-PC-12 with no PTX loading.
- PC- 12 and lyso-PC-12 produced the smallest size PTX-NP.
- the greatest entrapment efficiency of 45% was achieved for the formulation with 12 passes.
- Addition of cholesterol in the formulation did not improve PTX loading.
- a ratio of 80:20 of PC-12:lyso-PC-12 was optimum for nanoparticle size, drug incorporation, and stability.
- the optimized formulation had a particle size about 100 nm.
- the optimized formulation is stable for 24 h at 4°C.
- paclitaxel nanoparticles formulations include Abraxane (an albumin bound nanoparticle paclitaxel) and Genexol-PM® (a polymer bound nanoparticle paclitaxel).
- Abraxane an albumin bound nanoparticle paclitaxel
- Genexol-PM® a polymer bound nanoparticle paclitaxel.
- the development of Genexol-PM® was a significant step forward in manufacturing with utilization of a one pot synthesis technique using a biodegradable di-block copolymer composed of methoxy-poly(ethylene glycol)-poly(lactide) to form nanoparticles with paclitaxel containing hydrophobic core and a hydrophilic shell (See FIGURE 1).
- the present invention provides a one-pot synthesis of paclitaxel nanoparticle formulations using phospholipids that retain the desired plasma instability of Abraxane and the phosphate buffered saline (PBS) stability of Genexol-PM®. Due to the use of naturally occurring phospholipids in the paclitaxel nanoparticles of the invention, hypersensitivity should not be an issue.
- PBS phosphate buffered saline
- Nanoparticle synthesis was conducted using two methods: Method 1, microfluidization- solvent evaporation (similar to Abraxane® method); and Method 2, thin-film hydration (one-pot method similar to Genexol-PM® method). Briefly, in Method 2, phospholipids and paclitaxel were dissolved in ethanol and subjected to rotary evaporation until a thin film was formed and all the solvents were evaporated. The film was then hydrated using deionized (DI) water to produce paclitaxel-loaded phospholipid nanoparticles. Nanoparticle size and zeta potential were measured using a Malvern ZS DLS system.
- DI deionized
- the formulations were subjected to serial filtration using 1.2 ⁇ , 0.8 ⁇ , 0.45 ⁇ , and 0.2 ⁇ syringe filters.
- the drug incorporation/loading in the phospholipid nanoparticles was measured using ELISA.
- Electrochemical properties of the formulation were measured using screen printed carbon nanotube electrodes from DropSens and a PGSTAT204 Autolab station from Metrohm. Testing for dissolution of nanoparticles in human plasma, 50 mg/mL human serum albumin (HSA) solution, PBS and DI water was performed by measuring nanoparticle size using dynamic light scattering.
- HSA human serum albumin
- short chain lipids such as PC 10 (1,2-didecanoyl- sft-glycero-3-phosphocholine), PC 12 (l,2-dilauroyl-sn-glycero-3-phosphocholine), Lyso PC 10 (l-decanoyl-2-hydroxy-sn-glycero-3-phosphocholine) and Lyso PC 12 (1-lauroyl- 2-hydroxy-sft-glycero-3-phosphocholine) produced particles with good drug loading, optimal size, and stability.
- Method 2 produced nanoparticles with higher drug loading and higher stability as compared to Method 1.
- FIGURE 8 compares electrochemical response (cyclic voltammetry: current (mA) v. applied potential (V)) for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention (PC 12: Lyso 12) prepared by microfluidization and thin film evaporation methods.
- the phospholipid nanoparticles produced using Method 2 rapidly disintegrated in human plasma showing that that these nanoparticles (FIGURE IOC) have dissolution properties similar to Abraxane® (FIGURE 10A) and Genexol-PM® (FIGURE IOC). Like Genexol-PM®, the nanoparticles remained intact in deionized water and phosphate buffered saline (PBS) solution even at very low paclitaxel concentration (1-10 ug/ml). This property allows for LM-101 to be administered as PBS -diluted solution into peritoneal cavity for treatment of ovarian cancer or distilled into the bladder for treatment of bladder cancer.
- PBS phosphate buffered saline
- FIGURE 9 compares dissolution of representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention in deionized water (DI), phosphate buffered saline (PBS), and human plasma (50 mg/mL human serum albumin/PBS) showing particle size (nm) as a function of paclitaxel concentration ⁇ g/mL).
- DI deionized water
- PBS phosphate buffered saline
- human plasma 50 mg/mL human serum albumin/PBS
- FIGURES 10A, 10B, and IOC compare dissolution of Abraxane® nanoparticles (10A), Genexol-PM® nanoparticles (10B), and representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention (IOC) in deionized water (water), phosphate buffered saline (PBS), serum (0.1X: 5 mg/mL HS A/PBS), serum (1.0X: 50 mg/mL HS A/PBS), simulated plasma (50 mg/mL HSA/PBS), and plasma showing particle size (nm) as a function of paclitaxel concentration ⁇ g/mL).
- PBS phosphate buffered saline
- serum 0.1X: 5 mg/mL HS A/PBS
- serum 1.0X: 50 mg/mL HS A/PBS
- simulated plasma 50 mg/mL HSA/PBS
- plasma showing particle size (nm) as a function of paclitaxel concentration
- Paclitaxel is one of the most effective chemotherapeutic drugs for solid tumors including breast, lung and ovarian cancers.
- Paclitaxel has been formulated as a nanoparticle formulation, Abraxane®, to improve its solubility (0.35-0.7 ⁇ g/mL) and to avoid the use of harmful solvents like cremophor EL.
- a next generation Abraxane has been reported: Cynviloq®, a polymeric micelle paclitaxel formulation that uses a chemical polymer rather than a biological polymer to stabilize the nanoparticle.
- the present invention provides the use of phospholipids rather than the Cynviloq® chemical polymer for the creation of the next generation Abraxane®.
- the effect of lipid composition on drug loading and physical stability of paclitaxel-loaded lipid-coated nanoparticle formulations was evaluated before and after lyophilization.
- the nanoparticles were prepared by microfluidization- solvent evaporation and thin-film evaporation methods.
- the formulation parameters included type of phospholipids, phospholipid fatty acid chain length, ratio of phospholipid and lysophospholipid combination, and drug-phospholipid ratio.
- the process parameters such as microfluidization pressure and number of microfluidization cycles were studied and their impact on drug loading, particle size, and physical stability were evaluated.
- the short-term stability evaluation of nanoparticles prepared with different phospholipid ratios demonstrated that 4: 1 as the optimum phospholipid-lysophospholipid ratio to achieve a loading of more than 80% paclitaxel with particle size of approximately 200 nm.
- the nanoparticle size increased with an increase of carbon chain length of the phospholipid fatty acid, but no significant trends were observed for drug loading with changes in microfluidization pressure or number of cycles.
- the stability of the formulation was evaluated at different temperatures before and after lyophilization.
- the optimization of phospholipid composition, drug-lipid ratio, process parameters, and additives for stability on lyophilization led to a physically stable paclitaxel-loaded phopholipid-coated nanoparticulate formulation that maintains size, charge, and particulate integrity during storage.
- the phospholipid-coated paclitaxel loaded nanoparticles consisted of biodegradable and biocompatible components such as phospholipid, lyso-phospholipid, and cholesterol.
- the extent of paclitaxel loading in the phospholipid-coated nanoparticles and the stability of these nanoparticles was determined to be dependent on (i) the nature, type and concentration of phospholipids, (ii) the method of preparation, and (iii) the drug-lipid interaction that is determined by the drug-lipid ratio.
- paclitaxel-phospholipid nanoparticles were prepared by two methods: microfluidization- solvent evaporation and thin-film hydration methods.
- Method 1 Microfluidization-solvent evaporation method.
- the paclitaxel- phospholipid nanoparticles (PTX-NPs) were prepared by LV1 low volume Microfluidizer® processor microfluidization.
- the organic solvent containing paclitaxel and phospholipids were added to an aqueous phase and the emulsion was run through the microfluidizer to obtain nanoemulsion.
- the solvent from the nanoemulsion was removed by rotoevaporation to obtain a nanosuspension of paclitaxel.
- Method 2 Thin-film hydration method.
- the phospholipid film was prepared by dissolving paclitaxel and phospholipids in ethanol.
- the dry film was hydrated with water for visual, microscopic, size, and loading efficiency measurements of the resulting unfiltered formulation.
- the particle size and the particle size measurements were carried out using Zetasizer Nano-ZS and the Z av hydrodynamic diameter of the samples was determined by cumulative analysis.
- the particle size and particle size distribution by intensity were measured by photon correlation spectroscopy (PCS) ) using dynamic laser light scattering (4 mW He-Ne laser with a fixed wavelength of 633 nm, 173° backscatter at 25°C) in 10 mm diameter cells.
- Lyso-PLs prepared by microfluidization-solvent evaporation (Method 1) and thin-film hydration (Method 2) methods.
- Two distinct PLs and Lyso-PLs with different chain lengths and with significant phase transition temperature differences were used in the combination to prepare paclitaxel nanoparticles (PTX-NPs) stabilized with the phospholipids.
- PTX-NPs paclitaxel nanoparticles
- FIGURE 2 The physical properties of the PLs (PC- 12 - PC-20) and Lyso-PLs (lyso-PC-12 - lyso-PC-20) are shown in Table 1 above.
- a series of combinations of PLs and Lyso-PLs were investigated to develop a stable lipid-coated nanoparticle formulation for paclitaxel.
- thin-film hydration method in general produced particles of higher loading (up to 90%) than microfluidization- solvent evaporation method.
- PLs or lyso-PLs alone did not produce smaller particles of size about 200 nm in either method.
- FIGURE 11 compares paclitaxel loading (%) for representative phospholipid- coated therapeutic agent (paclitaxel) nanoparticles of the invention, PC-coated paclitaxel nanoparticle (LM-101), prepared by microfluidization- solvent evaporation (Method 1) and thin film-hydration evaporation (Method 2) methods.
- the combination of PL and lyso-PL produced smaller size particles of about 200 nm by either method (FIGURE 12).
- FIGURE 12 compares particle size (nm) for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention, PC-coated paclitaxel nanoparticle (LM-101), prepared by microfluidization-solvent evaporation (Method 1) and thin film-hydration (Method 2) methods.
- LM-101 PC-coated paclitaxel nanoparticle
- FIGURE 13 compares paclitaxel loading (%) for representative phospholipid- coated therapeutic agent (paclitaxel) nanoparticles of the invention as a function of PC carbon length (6-22) prepared by the thin film-hydration method (Method 2).
- FIGURE 14 compares paclitaxel loading (%) for representative phospholipid- coated therapeutic agent (paclitaxel) nanoparticles of the invention as a rehydration water temperature for nanoparticles prepared by the thin film-hydration method (Method 2).
- Nanoparticle formulations synthesized using Method 1 and Method 2 had different electrochemical properties. Nanoparticles produced using Method 1 were positively charged, and nanoparticles prepared by Method 2 were negatively charged, as shown in Table 4. The differences in surface charges of the particles produced by two different methods are likely indicative of different organization of lipids. In Method 1, it may be that paclitaxel is forced into the lipid without time sufficient for the lipid to organize by rapid removal of the solvents from the nanoemulsion. Method 2 is a mild condition which is kinetically favorable. Drug-loaded particles prepared by the two methods showed almost identical, near-neutral zeta potential.
- lyoprotectants Screening of the type and amount of lyoprotectants for stabilization of nanoparticles on lyophilization.
- the protective abilities of sucrose, mannitol, PVP, and trehalose as single lyoprotectants in different amounts were evaluated. Trehalose in amounts 5-20% were found to be best in stabilizing the particles on lyophilization as shown in FIGURE 15. Trehalose was the best excipient as lyoprotectant to inhibit the growth of particles on lyophilization.
- FIGURE 15 compares particle size as a function of lyoprotectant and lyoprotectant amount for representative phospholipid-coated therapeutic agent (paclitaxel) nanoparticles of the invention, PC-coated paclitaxel nanoparticle manufactured by thin film-hydration method (LM- 101), before lyophilization and after reconstitution.
- LM- 101 thin film-hydration method
- Formulations with 5- 10% trehalose were stable for 4 hours at room temperature after reconstitution (FIGURE 16).
- LM-101 thin film-hydration method
- the term “about” and “substantially” refer to a variation of less than 10% from the object of the term.
- the PTX-phospholipid NPs were prepared by LV1 low volume Microfluidizer ® processor (Microfluidics, Massachusetts, US) microfluidization.
- the organic solvent ethanol: chloroform (9: 1)
- aqueous phase de-ionized water, DI
- the solvent from the nanoemulsion was removed by rotary evaporation to provide a nanosuspension of phospholipid-coated PTX nanoparticles in the aqueous phase.
- Nanoparticles were prepared by mixing together the organic and aqueous phase.
- Organic phase consisted of 40 mg of 12:0 PC (DLPC) l,2-dilauroyl-5n-glycero-3- phosphocholine (Avanti Polar Lipids, Inc., Alabama, US), 10 mg of 12:0 lyso PC l-lauroyl-2-hydroxy-sn-glycero-3-phosphocholine (Avanti Polar Lipids, Inc., Alabama, US) and 10 mg of paclitaxel (paclitaxel was from Tecoland Corporation, Irvine, CA (DMF No. 11909)) dissolved in 0.16 ml of ethanol: chloroform (9: 1) solvent.
- the aqueous phase consists of 1.84 ml of DI water.
- the organic and aqueous phases were initially mixed using a homogenizer (VWR® 200 Homogenizer) for 1 minute to obtain micro sized particles or microemulsion.
- the micro-sized particles were further broken down to form nanoparticles using the LV1 microfluidizer.
- the formulation was pushed through 12 passes of the microfluidizer at a process pressure of 20,000 psi.
- the formulation was the diluted to a final volume of 10 ml using DI water.
- the phospholipids used were all of research grade: 1,2-didodecanoyl-sn-glycero- 3-phosphocholine( DLPC); l,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC); l,2-dipalmitoyl-sn-glycero-3-phosphocholine(DPPC); l,2-dioleoyl-sn-glycero-3- phosphocholine(DOPC) ; 1 ,2-diarachidoyl-sn-glycero-3 -phosphocholine(DAPC) ; l-dodecanoyl-sn-glycero-3-phosphocholine(lyso-LPC); l-myristoyl-2-hydroxy-sn- glycero-3-
- a phospholipid film was prepared by dissolving PTX and phospholipids in ethanol. The dry film was hydrated with water for visual, microscopic, size and loading efficiency measurements of the resulting unfiltered formulation.
- Organic phase consisted of 40 mg of 12:0 PC (DLPC) l,2-dilauroyl-5n-glycero-3- phosphocholine (Avanti Polar Lipids, Inc., Alabama, US), 10 mg of 12:0 lyso PC l-lauroyl-2-hydroxy-sn-glycero-3-phosphocholine (Avanti Polar Lipids, Inc., Alabama, US) and 10 mg of paclitaxel (paclitaxel was from Tecoland Corporation, Irvine, CA (DMF No. 11909)) dissolved in 10 ml of ethanol.
- Aqueous phase consists of 10 ml DI water. The two phases are mixed in a 250 ml evaporator flask.
- the water bath temperature is then increased to 60 °C and residual ethanol is removed by evaporation for another 1 hour.
- 10ml DI water heated to 60 °C is then added to the flask and the film is rehydrated with continuous stirring using a magnetic stirrer for 30 minutes.
- the particle size and the particle size measurements were carried out using Zetasizer Nano-ZS (Malvern Instruments Ltd, Worcestershire, UK) and the Z av hydrodynamic diameter of the samples was determined by cumulative analysis.
- the particle size and particle size distribution by intensity were measured by photon correlation spectroscopy (PCS) using dynamic laser light scattering (4 mW He-Ne laser with a fixed wavelength of 633 nm, 173° backscatter at 25°C) in 10 mm diameter cells.
- the Z av of the particle size also known as cumulants mean, is defined as harmonic intensity average particle diameter. All measurements were done with six runs.
- Zeta potential (surface charge) determinations of the NPs in water were based on the electrophoretic mobility of the particles using folded capillary cells in automatic mode of measurement duration using Zetasizer Nano-ZS.
- the measurements were performed by the laser scattering method using Smoluchowski model (Laser Doppler Microelectrophoresis, He-Ne laser 633 nm at 25 °C). All measurements were done with six runs.
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Abstract
La présente invention concerne des nanoparticules revêtues de phospholipide contenant un agent thérapeutique, des compositions qui comprennent lesdites nanoparticules, ainsi que des procédés de production et d'utilisation desdites nanoparticules et compositions.
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