US20090123451A1 - Slow intraventricular delivery - Google Patents
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- US20090123451A1 US20090123451A1 US12/187,896 US18789608A US2009123451A1 US 20090123451 A1 US20090123451 A1 US 20090123451A1 US 18789608 A US18789608 A US 18789608A US 2009123451 A1 US2009123451 A1 US 2009123451A1
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- C12N2750/14141—Use of virus, viral particle or viral elements as a vector
- C12N2750/14143—Use of virus, viral particle or viral elements as a vector viral genome or elements thereof as genetic vector
Definitions
- This invention is related to delivery of agents to the brain.
- it relates to brain diagnosis, treatment, and imaging.
- lysosomal storage diseases includes over forty genetic disorders, many of which involve genetic defects in various lysosomal hydrolases. Representative lysosomal storage diseases and the associated defective enzymes are listed in Table 1.
- LSD enzyme replacement therapy
- Gaucher type 1 patients have only visceral disease and respond favorably to ERT with recombinant glucocerebrosidase (CerezymeTM, Genzyme Corp.).
- NPA Niemann-Pick disease type A
- aSM acid sphingomyelinase enzyme
- aSM converts sphingomyelin to ceramide.
- aSM also has phospholipase C activities toward 1,2-diacylglycerolphosphocholine and 1,2-diacylglycerolphosphoglycerol. The enzyme converts
- a method is provided of delivering an agent to a patient's brain.
- the agent is administered to the patient via a lateral ventricle of the brain at a rate such that the administration of a single dose consumes more than two hours.
- a method is provided of delivering an agent to a patient's brain.
- the agent is administered to the patient via a lateral ventricle of the brain at a rate such that the administration of a single dose consumes at least 50% of the turn-over time of the cerebrospinal fluid in the patient.
- a method is provided of delivering an agent to a patient's brain.
- Turn-over time of cerebrospinal fluid of the patient is estimated.
- a rate for delivery and a total delivery time of the agent via a lateral ventricle of the brain is selected based on the turn-over time.
- a pump is set to deliver the agent at said selected rate for said total delivery time.
- a method is provided of delivering an agent to a patient's brain.
- Turn-over time of cerebrospinal fluid of the patient is estimated.
- a rate and a total delivery time is selected for delivery of the agent via a lateral ventricle of the brain based on the turn-over time.
- the agent is delivered to the patient at said selected rate for said total delivery time.
- a method is provided of delivering an agent to a patient's brain.
- the agent is administered to the patient via a lateral ventricle of the brain at a rate such that the administration of a single dose continues at least until the agent is detectable in serum of the patient.
- a patient with Niemann-Pick A or B disease is treated.
- An acid sphingomyelinase is administered to the patient via intraventricular delivery to the brain in an amount sufficient to reduce sphingomyelin levels in said brain.
- kits for treating a patient with Niemann-Pick A or B disease comprises an acid sphingomyelinase, and a catheter for delivery of said acid sphingomyelinase to the patient's brain ventricles.
- kits for treating a patient with Niemann-Pick A or B disease comprises an acid sphingomyelinase and a pump for delivery of said acid sphingomyelinase to the patient's brain ventricles.
- a patient can be treated who has a lysosomal storage disease which is caused by an enzyme deficiency which leads to accumulation of the enzyme's substrate.
- the enzyme is administered to the patient via intraventricular delivery to the brain.
- the rate of administration is such that the administration of a single dose consumes more than four hours. Substrate levels in said brain are thereby reduced.
- FIG. 1 shows diagram of sections of brain that were analyzed for sphingomyelin. S1 is at the front of brain and S5 is at the back of brain.
- FIG. 2 shows that intraventricular administration of rhASM reduces SPM levels in the ASMKO mouse brain.
- FIG. 3 shows intraventricular administration of rhASM reduces SPM levels in the ASMKO liver, spleen, and lung.
- FIG. 4 shows hASM staining in the brain following intraventricular infusion.
- FIG. 5 shows that intraventricular infusion of rhASM over a 6 h period reduces SPM levels in the ASMKO mouse brain.
- FIG. 6 shows that intraventricular infusion of rhASM over a 6 h period reduces SPM levels in ASMKO liver, serum, and lung.
- FIG. 7 shows documented hASM variants and their relationship to disease or enzyme activity.
- FIG. 8 shows the ventricular system which bathes the entire brain and spinal cord with cerebrospinal fluid.
- Agents which can be administered in this manner are any, but include diagnostic agents, imaging agents, anesthetic agents, and therapeutic agents. This mode of delivery is particularly useful for agents which cannot cross the blood-brain barrier.
- bolus intraventricular administration is not very effective, whereas slow infusion is very effective. While applicants do not wish to be bound by any particular theory of operation, it is believed that the slow infusion is effective due to the turn-over of the cerebrospinal fluid (CSF). While estimates and calculations in the literature vary, the adult human cerebrospinal fluid is believed to turn over within about 4, 5, 6, 7, or 8 hours. The turn-over rate may vary depending on the size of the individual and the volume of cerebrospinal fluid in the individual. Thus for example, children have less cerebrospinal fluid than adults and therefore have a shorter turn-over time.
- the slow infusion of the invention can be metered so that the delivery time is about equal to or greater than the turn-over time of the CSF.
- the metering can be a fixed time, for example, greater than 2, 4, 6, 8, or 10 hours, or it can be set to be a fraction of the estimated turn-over time, for example greater than 50%, 75%, 100%, 150%, 200%, 300%, or 400%.
- the CSF empties into the venous blood system.
- the delivery can be performed for a time until the delivered agent is detectable in the serum of the patient.
- One can also detect and/or measure delivered agent in other parts of the CNS such as in the spinal cord and the subarachnoid space. These, too, can be used as endpoints for delivery.
- CSF is secreted at a rate of about 430 to 600 ml/day or about 0.35 to 0.4 per minute in adults and the volume at any given moment is approximately 80 to 150 ml, with the entire volume being replaced every six to eight hours. Infants are estimated to produce 0.15 ml per minute.
- the choroid plexuses of the lateral ventricals are the largest and produce most of the CSF.
- the fluid flows through the intraventricular foramina in the third ventricle, is augmented by fluid formed in the choroid plexus of that ventricle, and passes through the cerebral aqueduct of Sylvius to the fourth ventricle.
- CSF flows from 4th ventricle to foramen of Magendie to the sub-arachnoid space that surrounds the spinal cord; CSF flows from 4th ventricle to the foramen of Lushka to the sub-arachnoid space that surrounds the brain.
- the arachnoid membrane lines the sub-arachnoid space; arachnoid villi are part of the membrane.
- Arachnoid villi are pumps that take in the CSF and return it to the venous circulation. The CSF is reabsorbed into the blood through the arachnoid villi.
- Slower-than-bolus delivery according to the invention has the advantage of delivering agents to portions of the brain that are not reached with a bolus.
- Bolus-delivered agent accumulates in the ependymal layer or in the parenchyma adjacent to the injection site.
- slow-delivered agents are found to access distal regions of the parenchyma from the injection site (widespread delivery across the anterior-to-posterior axis of the brain; in addition widespread delivery dorsally and ventrally to the ependymal layer), the third ventricle, the Aqueduct of Sylvius, the fourth ventricle, the Foramina of Lushka, the Foramina of Magendie, the spinal cord, the subarachnoid space, and the serum. From the serum, peripheral organs can also be reached.
- the CSF empties into the blood via the arachnoid villi and intracranial vascular sinuses, thereby delivering the enzymes to the visceral organs.
- the visceral organs which are often affected in Niemann-Pick disease are the lungs, spleen, kidney, and liver.
- the slow intraventricular infusion provides diminished amounts of substrate in at least these visceral organs.
- the reduction in substrate accumulated in the brain, lungs, spleen, kidney, and/or liver is dramatic. Reductions of greater that 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% can be achieved. The reduction achieved is not necessarily uniform from patient to patient or even from organ to organ within a single patient.
- Agents for delivery can be any that are known in the art for treatment and imaging of brains. Imaging agents can be radioactive, radio-opaque, fluorescent, etc. Therapeutic agents can be any that are useful for treating neurological or other brain diseases. Anesthetics can be for treating chronic or acute pain, for example lidocaine hydrochloride and morphine. Examples of therapeutic agents include the enzymes that are deficient in lysosomal storage diseases. Other possible agents for use include nucleic acid vectors, such as plasmid and viral vectors, siRNA, anti-sense RNAs, etc. Other therapeutic agents include those which increase or decrease excitation of neurons in the brain. These include agonists or antagonists of glutamate, GABA, and dopamine.
- cycloserine carboxyphenylglycine, glutamic acid, dizocilpine, ketamaine, dextromethorphan, baclofen, muscinol, gabazine, saclofen, haloperidol, and methane sulfonate.
- Additional agents which can be used are anti-inflammatory agents, in particular non-steroidal anti-inflammatory agents such as indomethacin and cyclooxygenase inhibitors.
- Nucleic acids can be delivered in any desired vector. These include viral or non-viral vectors, including adenovirus vectors, adeno-associated virus vectors, retrovirus vectors, lentivirus vectors, and plasmid vectors. Exemplary types of viruses include HSV (herpes simplex virus), AAV (adeno associated virus), HIV (human immunodeficiency virus), BW (bovine immunodeficiency virus), and MLV (murine leukemia virus). Nucleic acids can be administered in any desired format that provides sufficiently efficient delivery levels, including in virus particles, in liposomes, in nanoparticles, and complexed to polymers.
- viral or non-viral vectors including adenovirus vectors, adeno-associated virus vectors, retrovirus vectors, lentivirus vectors, and plasmid vectors.
- Exemplary types of viruses include HSV (herpes simplex virus), AAV (adeno associated virus), HIV (human immunodeficiency virus), BW (b
- Adenovirus is a non-enveloped, nuclear DNA virus with a genome of about 36 kb, which has been well-characterized through studies in classical genetics and molecular biology (Hurwitz, M. S., Adenoviruses Virology, 3 rd edition, Fields et al., eds., Raven Press, New York, 1996; Hitt, M. M. et al., Adenovirus Vectors, The Development of Human Gene Therapy , Friedman, T. ed., Cold Spring Harbor Laboratory Press, New York 1999).
- the viral genes are classified into early (designated E1-E4) and late (designated L1-L5) transcriptional units, referring to the generation of two temporal classes of viral proteins.
- the demarcation of these events is viral DNA replication.
- the human adenoviruses are divided into numerous serotypes (approximately 47, numbered accordingly and classified into 6 groups: A, B, C, D, E and F), based upon properties including hemaglutination of red blood cells, oncogenicity, DNA and protein amino acid compositions and homologies, and antigenic relationships.
- Recombinant adenoviral vectors have several advantages for use as gene delivery vehicles, including tropism for both dividing and non-dividing cells, minimal pathogenic potential, ability to replicate to high titer for preparation of vector stocks, and the potential to carry large inserts (Berkner, K. L., Curr. Top. Micro. Immunol. 158:39-66, 1992; Jolly, D., Cancer Gene Therapy 1:51-64 1994).
- Adenoviral vectors with deletions of various adenoviral gene sequences such as pseudoadenoviral vectors (PAVs) and partially-deleted adenoviral (termed “DeAd”), have been designed to take advantage of the desirable features of adenovirus which render it a suitable vehicle for delivery of nucleic acids to recipient cells.
- PAVs pseudoadenoviral vectors
- DeAd partially-deleted adenoviral
- pseudoadenoviral vectors also known as ‘gutless adenovirus’ or mini-adenoviral vectors
- PAVs are adenoviral vectors derived from the genome of an adenovirus that contain minimal cis-acting nucleotide sequences required for the replication and packaging of the vector genome and which can contain one or more transgenes
- PAVs have been designed to take advantage of the desirable features of adenovirus which render it a suitable vehicle for gene delivery.
- adenoviral vectors can generally carry inserts of up to 8 kb in size by the deletion of regions which are dispensable for viral growth, maximal carrying capacity can be achieved with the use of adenoviral vectors containing deletions of most viral coding sequences, including PAVs. See U.S. Pat. No. 5,882,877 of Gregory et al.; Kochanek et al., Proc. Natl. Acad. Sci. USA 93:5731-5736, 1996; Parks et al., Proc. Natl. Acad. Sci. USA 93:13565-13570, 1996; Lieber et al., J.
- PAVs which can accommodate up to about 36 kb of foreign nucleic acid, are advantageous because the carrying capacity of the vector is optimized, while the potential for host immune responses to the vector or the generation of replication-competent viruses is reduced.
- PAV vectors contain the 5′ inverted terminal repeat (ITR) and the 3′ ITR nucleotide sequences that contain the origin of replication, and the cis-acting nucleotide sequence required for packaging of the PAV genome, and can accommodate one or more transgenes with appropriate regulatory elements, e.g. promoter, enhancers, etc.
- adenoviral vectors provide a partially-deleted adenoviral (termed “DeAd”) vector in which the majority of adenoviral early genes required for virus replication are deleted from the vector and placed within a producer cell chromosome under the control of a conditional promoter.
- the deletable adenoviral genes that are placed in the producer cell may include E1A/E1B, E2, E4 (only ORF6 and ORF6/7 need be placed into the cell), pIX and pIVa2.
- E3 may also be deleted from the vector, but since it is not required for vector production, it can be omitted from the producer cell.
- the adenoviral late genes normally under the control of the major late promoter (MLP), are present in the vector, but the MLP may be replaced by a conditional promoter.
- MLP major late promoter
- Conditional promoters suitable for use in DeAd vectors and producer cell lines include those with the following characteristics: low basal expression in the uninduced state, such that cytotoxic or cytostatic adenovirus genes are not expressed at levels harmful to the cell; and high level expression in the induced state, such that sufficient amounts of viral proteins are produced to support vector replication and assembly.
- Preferred conditional promoters suitable for use in DeAd vectors and producer cell lines include the dimerizer gene control system, based on the immunosuppressive agents FK506 and rapamycin, the ecdysone gene control system and the tetracycline gene control system.
- Also useful in the present invention may be the GeneSwitchTM technology (Valentis, Inc., Woodlands, Tex.) described in Abruzzese et al., Hum. Gene Ther. 1999 10:1499-507, the disclosure of which is hereby incorporated herein by reference.
- the partially deleted adenoviral expression system is further described in WO99/57296, the disclosure of which is hereby incorporated by reference herein.
- Adeno-associated virus is a single-stranded human DNA parvovirus whose genome has a size of 4.6 kb.
- the AAV genome contains two major genes: the rep gene, which codes for the rep proteins (Rep 76, Rep 68, Rep 52, and Rep 40) and the cap gene, which codes for AAV replication, rescue, transcription and integration, while the cap proteins form the AAV viral particle.
- AAV derives its name from its dependence on an adenovirus or other helper virus (e.g., herpesvirus) to supply essential gene products that allow AAV to undergo a productive infection, i.e., reproduce itself in the host cell.
- helper virus e.g., herpesvirus
- AAV integrates as a provirus into the host cell's chromosome, until it is rescued by superinfection of the host cell with a helper virus, usually adenovirus (Muzyczka, Curr. Top. Micor. Immunol. 158:97-127, 1992).
- ITR inverted terminal repeat
- AAV AAV for gene transfer.
- the host range of AAV is broad.
- AAV can infect both quiescent and dividing cells.
- AAV has not been associated with human disease, obviating many of the concerns that have been raised with retrovirus-derived gene transfer vectors.
- Standard approaches to the generation of recombinant rAAV vectors have required the coordination of a series of intracellular events: transfection of the host cell with an rAAV vector genome containing a transgene of interest flanked by the AAV ITR sequences, transfection of the host cell by a plasmid encoding the genes for the AAV rep and cap proteins which are required in trans, and infection of the transfected cell with a helper virus to supply the non-AAV helper functions required in trans (Muzyczka, N., Curr. Top. Micor. Immunol. 158:97-129, 1992).
- the adenoviral (or other helper virus) proteins activate transcription of the AAV rep gene, and the rep proteins then activate transcription of the AAV cap genes.
- the cap proteins then utilize the ITR sequences to package the rAAV genome into an rAAV viral particle. Therefore, the efficiency of packaging is determined, in part, by the availability of adequate amounts of the structural proteins, as well as the accessibility of any cis-acting packaging sequences required in the rAAV vector genome.
- Retrovirus vectors are a common tool for gene delivery (Miller, Nature (1992) 357:455-460). The ability of retrovirus vectors to deliver an unrearranged, single copy gene into a broad range of rodent, primate and human somatic cells makes retroviral vectors well suited for transferring genes to a cell.
- Retroviruses are RNA viruses wherein the viral genome is RNA.
- the genomic RNA is reverse transcribed into a DNA intermediate which is integrated very efficiently into the chromosomal DNA of infected cells.
- This integrated DNA intermediate is referred to as a provirus.
- Transcription of the provirus and assembly into infectious virus occurs in the presence of an appropriate helper virus or in a cell line containing appropriate sequences enabling encapsidation without coincident production of a contaminating helper virus.
- a helper virus is not required for the production of the recombinant retrovirus if the sequences for encapsidation are provided by co-transfection with appropriate vectors.
- the retroviral genome and the proviral DNA have three genes: the gag, the pol, and the env, which are flanked by two long terminal repeat (LTR) sequences.
- the gag gene encodes the internal structural (matrix, capsid, and nucleocapsid) proteins; the pol gene encodes the RNA-directed DNA polymerase (reverse transcriptase) and the env gene encodes viral envelope glycoproteins.
- the 5′ and 3′ LTRs serve to promote transcription and polyadenylation of the virion RNAs.
- the LTR contains all other cis-acting sequences necessary for viral replication.
- Lentiviruses have additional genes including vit vpr, tat, rev, vpu, nef, and vpx (in HIV-1, HIV-2 and/or SIV). Adjacent to the 5′ LTR are sequences necessary for reverse transcription of the genome (the tRNA primer binding site) and for efficient encapsidation of viral RNA into particles (the Psi site). If the sequences necessary for encapsidation (or packaging of retroviral RNA into infectious virions) are missing from the viral genome, the result is a cis defect which prevents encapsidation of genomic RNA. However, the resulting mutant is still capable of directing the synthesis of all varion proteins.
- Lentiviruses are complex retroviruses which, in addition to the common retroviral genes gag, pol and env, contain other genes with regulatory or structural function. The higher complexity enables the lentivirus to modulate the life cycle thereof, as in the course of latent infection.
- a typical lentivirus is the human immunodeficiency virus (HIV), the etiologic agent of AIDS.
- HIV can infect terminally differentiated cells that rarely divide, such as lymphocytes and macrophages.
- HIV can infect primary cultures of monocyte-derived macrophages (MDM) as well as HeLa-Cd4 or T lymphoid cells arrested in the cell cycle by treatment with aphidicolin or gamma irradiation.
- Infection of cells is dependent on the active nuclear import of HIV preintegration complexes through the nuclear pores of the target cells. That occurs by the interaction of multiple, partly redundant, molecular determinants in the complex with the nuclear import machinery of the target cell.
- Identified determinants include a functional nuclear localization signal (NLS) in the gag matrix (MA) protein, the karyophilic virion-associated protein, vpr, and a C-terminal phosphotyrosine residue in the gag MA protein.
- NLS nuclear localization signal
- MA gag matrix
- vpr the karyophilic virion-associated protein
- C-terminal phosphotyrosine residue in the gag MA protein.
- aSM acid sphingomyelinase
- SEQ ID NO: 1 Although a particular amino acid sequence is shown in SEQ ID NO: 1, normal variants in the human population which retain activity can be used as well. Typically these normal variants differ by just one or two residues from the sequence shown in SEQ ID NO: 1. The variants to be used should be at least 95%, 96%, 97%, 98%, or 99% identical to SEQ ID NO: 1. Variants which are associated with disease or reduced activity should not be used. Typically the mature form of the enzyme will be delivered. This will begin with residue 47 as shown in SEQ ID NO: 1. Variants which are associated with disease are shown in FIG. 7 .
- Kits according to the present invention are assemblages of separate components. While they can be packaged in a single container, they can be subpackaged separately. Even a single container can be divided into compartments. Typically a set of instructions will accompany the kit and provide instructions for delivering the diagnostic, therapeutic, or anesthetic agents, such as lysosomal hydrolase enzymes, intraventricularly.
- the instructions may be in printed form, in electronic form, as an instructional video or DVD, on a compact disc, on a floppy disc, on the internet with an address provided in the package, or a combination of these means.
- diluents such as diluents, buffers, solvents, tape, screws, and maintenance tools
- Printed matter or other instructional materials may correlate volume of CSF, turn-over time of CSF, patient weight, patient age, delivery rate, delivery time, and/or other parameters.
- Pumps may be calibrated to deliver at specified rates based on CSF volume and/or turn-over time and/or patient age and/or patient weight.
- the populations treated by the methods of the invention include, but are not limited to, patients having or at risk for developing a neurometabolic disorder, e.g., an LSD, such as diseases listed in Table 1, particularly, if such a disease affects the CNS and visceral organs.
- a neurometabolic disorder e.g., an LSD
- the disease is type A Niemann-Pick disease. If genetic propensity for the disease has been determined, treatment may begin prenatally.
- Other diseases or conditions which may be treated include but are not limited to neurosurgical patients, stroke patients, Huntington's disease, epilepsy, Parkinson's disease, Lou Gehrig's disease, Alzheimer's disease.
- An agent such as a lysosomal hydrolase enzyme, can be incorporated into a pharmaceutical composition.
- the composition can be useful to diagnose, anesthetize, or treat, e.g., inhibit, attenuate, prevent, or ameliorate, a condition characterized by an insufficient level of a lysosomal hydrolase activity.
- the pharmaceutical composition can be administered to a subject suffering from a lysosomal hydrolase deficiency or someone who is at risk of developing said deficiency.
- the compositions should contain a an effective diagnostic, anesthetic, therapeutic or prophylactic amount of the agent, in a pharmaceutically-acceptable carrier.
- the pharmaceutical carrier can be any compatible, non-toxic substance suitable to deliver the polypeptides to the patient.
- Sterile water, alcohol, fats, and waxes may be used as the carrier.
- Pharmaceutically-acceptable adjuvants, buffering agents, dispersing agents, and the like, may also be incorporated into the pharmaceutical compositions.
- the carrier can be combined with the agent in any form suitable for administration by intraventricular injection or infusion (also possibly intravenous or intrathecal) or otherwise.
- Suitable carriers include, for example, physiological saline, bacteriostatic water, Cremophor ELTM (BASF, Parsippany, N.J.) or phosphate buffered saline (PBS), other saline solutions, dextrose solutions, glycerol solutions, water and oils emulsions such as those made with oils of petroleum, animal, vegetable, or synthetic origin (peanut oil, soybean oil, mineral oil, or sesame oil).
- An artificial CSF can be used as a carrier.
- the carrier will preferably be sterile and free of pyrogens.
- concentration of the agent in the pharmaceutical composition can vary widely, i.e., from at least about 0.01% by weight, to 0.1% by weight, to about 1% weight, to as much as 20% by weight or more.
- the composition For intraventricular administration, the composition must be sterile and should be fluid. It must be stable under the conditions of manufacture and storage and must be preserved against the contaminating action of microorganisms such as bacteria and fungi. Prevention of the action of microorganisms can be achieved by various antibacterial and antifungal agents, for example, parabens, chlorobutanol, phenol, ascorbic acid, thimerosal, and the like. In many cases, it will be preferable to include isotonic agents, for example, sugars, polyalcohols such as manitol, sorbitol, sodium chloride in the composition.
- isotonic agents for example, sugars, polyalcohols such as manitol, sorbitol, sodium chloride in the composition.
- Dosage of any agent, whether aSM or other lysosomal hydrolase enzyme, may vary somewhat from individual to individual, depending on the particular agent or enzyme and its specific in vivo activity, the route of administration, the medical condition, age, weight or sex of the patient, the patient's sensitivities to the aSM agent or components of vehicle, and other factors which the attending physician will be capable of readily taking into account. While dosages may vary depending on the disease and the patient, the enzyme is generally administered to the patient in amounts of from about 0.1 to about 1000 milligrams per 50 kg of patient per month, preferably from about 1 to about 500 milligrams per 50 kg of patient per month.
- a pump One way for delivering a slow infusion is to use a pump.
- Such pumps are commercially available, for example, from Alzet (Cupertino, Calif.) or Medtronic (Minneapolis, Minn.).
- the pump may be implantable or external.
- Another convenient way to administer the enzymes, is to use a cannula or a catheter.
- the cannula or catheter may be used for multiple administrations separated in time. Cannulae and catheters can be implanted stereotaxically. It is contemplated that multiple administrations will be used to treat the typical patient with a lysosomal storage disease.
- Catheters and pumps can be used separately or in combination. Catheters can be inserted surgically, as is known in the art. Kits can comprise an agent and a catheter and/or a pump. The pump may have settings suitable for delivery rates based on the volume of CSF in an individual.
- ASMKO mice are an accepted model of types A and B Niemann-Pick disease (Horinouchi et al. (1995) Nat. Genetics, 10:288-293; Jin et al. (2002) J. Clin. Invest., 109:1183-1191; and Otterbach (1995) Cell, 81:1053-1061).
- Niemann-Pick disease (NPD) is classified as a lysosomal storage disease and is an inherited neurometabolic disorder characterized by a genetic deficiency in acid sphingomyelinase (ASM; sphingomyelin cholinephosphohydrolase, EC 3.1.3.12).
- ASM protein results in the accumulation of sphingomyelin substrate within the lysosomes of neurons and glia throughout the brain. This leads to the formation of large numbers of distended lysosomes in the perikaryon, which are a hallmark feature and the primary cellular phenotype of type A NPD. The presence of distended lysosomes correlates with the loss of normal cellular function and a progressive neurodegenerative course that leads to death of the affected individual in early childhood (The Metabolic and Molecular Bases of Inherited Diseases, eds. Scriver et al., McGraw-Hill, New York, 2001, pp. 3589-3610).
- Sphingomyelin has strong affinity for cholesterol, which results in the sequestering of large amounts of cholesterol in the lysosomes of ASMKO mice and human patients (Leventhal et al. (2001) J. Biol. Chem., 276:44976-44983; Slotte (1997) Subcell. Biochem., 28:277-293; and Viana et al. (1990) J. Med. Genet., 27:499-504.)
- Goal to determine lowest efficacious dose over a 6 h infusion period.
- Tissue samples are prepared for SPM analysis.
- ASMKO mice will be stereotaxically implanted with an indwelling guide cannula between 9 and 10 weeks of age. At 13 weeks of age mice will be infused over a 6 period with 0.025 mg of hASM. At 14 and 16 weeks of age mice will undergo cognitive testing using the Barnes maze.
- Goal to determine the distribution of hASM protein (as function of time) within the brain and spinal cord of ASMKO mice after intraventricular infusion
- mice will be stereotaxically implanted with an indwelling guide cannula between 12 and 13 weeks of age. At 14 weeks of age mice will be infused over a 6 period with 0.025 mg of hASM. Following infusion procedure mice will either be sacrificed immediately or 1 week or 2 weeks or 3 weeks later.
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US16/281,961 US11253485B2 (en) | 2006-02-09 | 2019-02-21 | Slow intraventricular delivery |
US17/572,330 US20220370348A1 (en) | 2006-02-09 | 2022-01-10 | Slow intraventricular delivery |
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PCT/US2007/003382 WO2007095056A2 (en) | 2006-02-09 | 2007-02-08 | Slow intraventricular delivery |
US12/187,896 US20090123451A1 (en) | 2006-02-09 | 2008-08-07 | Slow intraventricular delivery |
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US20110021469A1 (en) * | 2007-06-13 | 2011-01-27 | Meythaler Jay M | baclofen solution for low-volume therapeutic delivery |
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US10080783B2 (en) | 2006-01-20 | 2018-09-25 | Genzyme Corporation | Intraventricular enzyme delivery for lysosomal storage diseases |
US11103596B2 (en) | 2015-05-11 | 2021-08-31 | Ucl Business Plc | Fabry disease gene therapy |
US11253485B2 (en) | 2006-02-09 | 2022-02-22 | Genzyme Corporation | Slow intraventricular delivery |
US11260112B2 (en) | 2010-06-25 | 2022-03-01 | Shire Human Genetic Therapies, Inc. | Methods and compositions for CNS delivery of iduronate-2-sulfatase |
US11819539B2 (en) | 2017-09-22 | 2023-11-21 | The Trustees Of The University Of Pennsylvania | Gene therapy for treating Mucopolysaccharidosis type II |
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US8865182B2 (en) | 2009-07-31 | 2014-10-21 | Paxvax, Inc. | Adenoviral-based vectors |
MX2014015985A (es) | 2012-06-19 | 2015-07-21 | Univ Florida | Composiciones y metodos para tratar enfermedades. |
KR20220119187A (ko) * | 2013-05-15 | 2022-08-26 | 리젠츠 오브 더 유니버시티 오브 미네소타 | 중추 신경계로의 아데노-연관 바이러스 매개 유전자 전달 |
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US10188705B2 (en) | 2009-08-28 | 2019-01-29 | Icahn School Of Medicine At Mount Sinai | Dose escalation enzyme replacement therapy for treating acid sphingomyelinase deficiency |
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US11103596B2 (en) | 2015-05-11 | 2021-08-31 | Ucl Business Plc | Fabry disease gene therapy |
US11819539B2 (en) | 2017-09-22 | 2023-11-21 | The Trustees Of The University Of Pennsylvania | Gene therapy for treating Mucopolysaccharidosis type II |
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Owner name: GENZYME CORPORATION, MASSACHUSETTS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DODGE, JAMES;PASSINI, MARCO A.;SHIHABUDDIN, LAMYA;AND OTHERS;REEL/FRAME:022080/0680;SIGNING DATES FROM 20081020 TO 20081028 |
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STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |