WO2006050649A1 - Captopril a ciblage magnetique et liberation lente et procede pour le preparer - Google Patents
Captopril a ciblage magnetique et liberation lente et procede pour le preparer Download PDFInfo
- Publication number
- WO2006050649A1 WO2006050649A1 PCT/CN2005/001463 CN2005001463W WO2006050649A1 WO 2006050649 A1 WO2006050649 A1 WO 2006050649A1 CN 2005001463 W CN2005001463 W CN 2005001463W WO 2006050649 A1 WO2006050649 A1 WO 2006050649A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- captopril
- magnetic
- cpl
- slow
- ldhs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- A61K9/5094—Microcapsules containing magnetic carrier material, e.g. ferrite for drug targeting
-
- 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
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
- A61K31/401—Proline; Derivatives thereof, e.g. captopril
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/04—Inotropic agents, i.e. stimulants of cardiac contraction; Drugs for heart failure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/12—Antihypertensives
Definitions
- the invention relates to a magnetic targeted sustained release captopril and a preparation method thereof. Background technique
- the targeted drug delivery system targeted drug del ivery sys tem
- the administration system refers to that the drug is combined with the carrier or encapsulated by the carrier to directly locate the drug in the target region, or the drug is collected in the target region after administration, so that the target drug concentration is higher than that of the normal tissue administration system.
- Targeted administration can reduce the dosage, improve the efficacy of the drug, reduce the side effects of the drug, and enhance the specificity of the drug to the target tissue.
- the magnetic microsphere formulation is a fourth generation targeted drug delivery system.
- the dosage form is characterized in that a drug and a suitable magnetic component (such as Fe 3 0 4 ) are formulated in a drug stabilization system, and under a sufficiently strong external magnetic field, the carrier is gradually directed to the target site to enable the drug to be contained therein.
- Captopril is a first-generation angiotensin-converting enzyme (ACE) inhibitor that acts on the renin-angiotensin system to regulate the balance of blood pressure, electrolytes, and body fluids.
- ACE angiotensin-converting enzyme
- the role of improving heart function and renal function has been clinically recognized and affirmed, and has become a first-line drug for the treatment of hypertension and heart failure.
- the clinical manifestation of the drug is the dissolution of common preparations. Faster, the body elimination half-life is shorter, and the peak-to-valley concentration difference is larger. Therefore, research on captopril targeted sustained release dosage forms has been one of the hotspots, but the research on magnetic targeting captopril sustained release agents is still blank.
- the magnetic captopril sustained release dosage form of the invention Cpl-LDHs/MP (where MP is magnetic particles), the chemical formula of which is:
- M 2+ is any one of Zn 2+ , Mg 2+ , Ni 2+ , Cu 2 ⁇ Fe 2 Co 2 Ca 2+ , Mn 2+ , preferably Zn 2+ or Mg 2+
- 3+ is any one of Al 3+ , Fe 3+ , Cr 3+ , V 3 Co 3 Ga 3 Ti 3+ , and more preferably Al 3+ ;
- Cpl Cpl 2 - represents the interlayer monovalent, divalent captopril anion
- ⁇ ⁇ is an inorganic anion having a charge of ⁇ , ⁇ ⁇ — may be absent or any of CO —, N0 3 —, CI—, Br—, ⁇ , 0 ⁇ ⁇ 2 ⁇ 0 4 —
- MP is any one of magnetic substances MgFe 2 0 4 , NiFe 2 0 4 , CoFe 2 0 4 , ZnFe 2 0 4 , MnFe 2 0 4 and Fe 3 0 4 , and MgFeA, NiFeA and Fe 3 0 4 are preferable.
- the magnetic structure of the magnetic slow release agent is a shell-core type, that is, the magnetic nano-particles are coated with a layered material Cpl-LDHs having a specific saturation magnetization of 1. 0-6. 0 emu/g and a particle size distribution of 20- 200 nm.
- the magnetic sustained release agent has a mass percentage of captopril of 10-50%, preferably 20-40%; the sustained-end period can reach 0. 4 h - 13 h, and the average can reach 0. 5 h - 4 h.
- the specific preparation process of the magnetic captopril sustained release agent of the invention is as follows:
- M 2+ is any one of Zn 2+ , Mg 2 ⁇ Ni 2 ⁇ Cu 2+ , Fe 2+ , Co 2+ , Ca 2+ , Mn 2+ , preferably Zn 2+ or Mg 2 + ;
- M 3+ is any one of Al 3+ , Fe 3+ , Cr 3+ , V 3+ , Co 3+ , Ga 3+ , Ti 3+ , preferably Al 3+ ;
- MM 3+ The preferred molar ratio is 1- 4:1;
- Y, and ⁇ 2 represent any of the soluble ⁇ 2+ , ⁇ 3+ salt anions NO Cr, Br ⁇ ⁇ , H 2 P0 4 — , C0 3 2 — , Y, ⁇ 2 may be the same or different, preferably N0 3 —, Cl—, CO—;
- MP is MgFe 2 0 4 , NiFe 2 0 4 , CoFe 2 0 4 , ZnFe 2 0 s MnFe
- Step 3 Under N 2 protection, the reaction slurry in the crystallization tank is crystallized at 25-70 °C for 12-64 h, then filtered by suction, and washed with decarbonated deionized water until neutral, at 15-70. Dry at °C for 25-60 h to obtain Cpl-LDHs/MP 0
- the obtained Cpl-LDHs/MP was characterized by X-ray powder diffraction and IR. The results showed that Cpl was intercalated between the layers and interacted with the laminate through hydrogen bonding and had the crystal structure of the hydrotalcite-like material.
- the CPS was confirmed by XPS characterization.
- the LDHs are connected to the MP phase in the form of lattice oxygen; the vibrating sample magnetometer shows that Cpl-LDHs/MP has significant magnetic properties.
- Cpl-LDHs release experiment Take two 0.5 g of Cpl-LDHs/MP, placed in two Erlenmeyer flasks containing pH buffer solution (4.6 and 7.4), and then the conical flask The mixture was vortexed continuously in a water bath thermostat, and a small amount of suspension was taken at regular intervals. After the suspension was separated by centrifugation, the concentration of captopril was measured by spectrophotometry according to the Chinese Pharmacopoeia. It can be seen from Fig. 3 that the sustained release effect of Cpl-LDHs/MP is significantly affected by pH and has a certain sustained release capacity in different pH environments.
- the invention has the advantages that: the drug is magnetically supported, and the drug can be targeted to the lesion site under the guidance of external magnetic properties, the dosage is reduced, the drug efficacy is improved, the toxic side effect of the drug is reduced, and the specificity of the drug to the target tissue is enhanced. Since the hydrotalcite-like layered material can ion exchange with the phosphate anion in the intestine, and then the layer Cpl is released and released to achieve controlled release, it can be used as a sustained release matrix material. BRIEF DESCRIPTION OF THE DRAWINGS
- Figure 1 is an X-ray powder diffraction pattern of Cpl-LDHs/MP under the conditions of Example 1.
- 2 is an IR spectrum of Cp LDHs/MP under the conditions of Example 1.
- Figure 3 is a graph showing the release profile of captopril of Cpl-LDHs/MP in sulphate buffer solution (pH 4.6 and pH 7.4) under the conditions of Example 1.
- FIG. 4 is an electron micrograph of Cpl-LDHs/MP under the conditions of Example 1. DETAILED DESCRIPTION OF THE INVENTION Example 1
- the obtained slurry was crystallized at 25 °C for 48 h, filtered, washed, and vacuum dried at room temperature for 60 h to obtain a magnetic captopril sustained-release agent.
- the water used in the process is decarbonated deionized water.
- Figure 1 shows the results of powder diffraction of Cpl-LDHs/MgFe 2 0 ⁇ X-rays with the crystal structure of hydrotalcite-like materials.
- Figure 2 shows the results of Cpl-LDHs /MgFe 2 0 ⁇ IR characterization. It is confirmed that Cpl has been inserted into the interlayer and interacted with the laminate through hydrogen bonding, and the characteristic absorption peak of MgFe 2 0 4 can be observed.
- Figure 3 is a graph showing the release profile of captopril in a phosphate buffer solution (pH 4.6 and pH 7.4) of Cpl-LDHs / MgFe 2 0 4 .
- the MgFe 2 0 4 in the first step of the embodiment 1 was replaced with the same mass of NiFeA, and the other parts were the same as in the first embodiment.
- Example 3 The obtained sample was analyzed in the same manner as in Example 1, and its empirical formula was: [Mgo. 63 2 Alo.36 8 (OH) 2 ] (C 9 H, with S 2 -) 0. 0736 (C0 3 0. ⁇ 4 ⁇ 0. 6H 2 0 / (NiFe 2 0 4) oo] 52, mass captopril content of 20.40%, the saturation magnetization of 1. 30 emu / g Example 3
- Example 1 The MgFe 2 0 4 in the first step of Example 1 was replaced with the same quality of Fe 3 0 4 , and the other parts were the same as in Example 1.
- the slurry was crystallized at 25 °C for 48 h, filtered, washed, and vacuum dried at room temperature for 60 h to obtain a magnetic captopril extended release agent.
- the water used in the process is decarbonated deionized water.
- Example 4 The MgFe 2 0 4 in the first step of Example 4 was replaced with NiFeA of the same quality, and the other parts were the same as in Example 4.
- Example 6 The obtained sample was analyzed in the same manner as in Example 1, and its empirical chemical formula was: [ ⁇ . ⁇ 6 ⁇ 1 , 39 ⁇ ) 2 ] (C 9 H, 3 N0 3 S 2 - ).
- Example 6
- Example 4 The MgFeA in the first step of Example 4 was replaced with the same quality of Fe 3 0 4 , and the other parts were the same as in Example 4.
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pharmacology & Pharmacy (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Cardiology (AREA)
- Epidemiology (AREA)
- Heart & Thoracic Surgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Organic Chemistry (AREA)
- Hospice & Palliative Care (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100908179A CN100496613C (zh) | 2004-11-15 | 2004-11-15 | 一种磁性靶向缓释型卡托普利及其制备方法 |
| CN200410090817.9 | 2004-11-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006050649A1 true WO2006050649A1 (fr) | 2006-05-18 |
Family
ID=36336200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2005/001463 Ceased WO2006050649A1 (fr) | 2004-11-15 | 2005-09-12 | Captopril a ciblage magnetique et liberation lente et procede pour le preparer |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100496613C (zh) |
| WO (1) | WO2006050649A1 (zh) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106552269B (zh) * | 2015-09-23 | 2019-04-16 | 南京理工大学 | 一种pH敏感型Fe3O4@LDH负载甲氨蝶呤的纳米药物颗粒、制备方法及其应用 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1640395A (zh) * | 2004-01-07 | 2005-07-20 | 北京化工大学 | 一种超分子插层结构缓释型卡托普利及其制备方法 |
-
2004
- 2004-11-15 CN CNB2004100908179A patent/CN100496613C/zh not_active Expired - Fee Related
-
2005
- 2005-09-12 WO PCT/CN2005/001463 patent/WO2006050649A1/zh not_active Ceased
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1640395A (zh) * | 2004-01-07 | 2005-07-20 | 北京化工大学 | 一种超分子插层结构缓释型卡托普利及其制备方法 |
Non-Patent Citations (3)
| Title |
|---|
| REN LINGLING ET AL: "Intercalation and assembly of anion pillared materials.", HUAXUE TONGBAO., no. 11, 2001, pages 686 - 691 * |
| SUN HUI ET AL: "Structural design and characteriaztion of magnetic drug-inorganic nanocomposite materials.", CHINESE SCIENCE BULLETIN., vol. 49, no. 24, 30 December 2004 (2004-12-30), pages 2525 - 2530 * |
| ZHANG HAIYONG ET AL: "New magnetic nanometric functional Mg-Al hydrotalcites.", WUJI HUAXUE XUEBAO., vol. 18, no. 2, 2002, pages 185 - 189 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1775209A (zh) | 2006-05-24 |
| CN100496613C (zh) | 2009-06-10 |
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