Hierarchical siliceous mesosilicalite nanocarrier loaded with platinum(II) complex

Patent metadata

Field	Value
Publication number	US-11103594-B2
Application number	US-201815992953-A
Country	US
Kind code	B2
Filing date	May 30, 2018
Priority date	Feb 1, 2018
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

A platinum(II) complex loaded on a mesosilicalite nanocarrier having a hierarchical silicalite characterized by a molar ratio of aluminum to silica in a range of 1:3000 to 1:1000. The hierarchical silicalite includes mesopores of a hexagonal structure, and micropores of silicalite structure with a microporous volume in the range of 0.05 cc/g to 0.1 cc/g. The mesosiliclite nanocarrier loaded with the platinum(II) complex is suitable for treatment of cancer, in particular, breast, cervical, and colon cancers.

First claim

The invention claimed is:

1. A mesosilicalite nanocarrier, comprising:
a hierarchical silicalite having a silica to aluminum molar ratio in a range of 1000:1 to 3000:1, comprising:
a mesophase with mesopores of a hexagonal structure; and
a microphase with micropores of a microporous volume in the range of 0.05 cc/g to 0.1 cc/g; and
a platinum(II) complex loaded in the mesopores and micropores of the nanocarrier;
wherein a mean pore diameter of the mesosilicalite nanocarrier is in the range of 1.5 nm to 5.5 nm and wherein the nanocarrier has a pore size distribution comprising micropores having a pore diameter in the range of 2.0-2.8 nm and mesopores having a pore diameter in the range of 2.9-4.0 nm.

2. The mesosilicalite nanocarrier of claim 1 , wherein the platinum(II) complex is at least one selected from the group consisting of cisplatin, carboplatin, oxaliplatin, nedaplatin, triplatin tetranitrate, phenanthriplatin, picoplatin, and strataplatin.

3. The mesosilicalite nanocarrier of claim 1 , wherein the platinum(II) is present in amount in the range of 0.001 to 1800 mmol/g of the total weight of the mesosilicalite nanocarrier.

4. The mesosilicalite nanocarrier of claim 1 , wherein the platinum(II) is present in amount in the range of 0.01 to 0.9 mmol/g of the total weight of the mesosilicalite nanocarrier.

5. The mesosilicalite nanocarrier of claim 1 , wherein the mesosilicalite nanocarrier has a surface area in the range of 400 to about 1400 m 2 /g.

6. The mesosilicalite nanocarrier of claim 1 , wherein the mesosilicalite nanocarrier has a pore volume in the range of 0.30-0.90 mL/g.

7. A pharmaceutical composition comprising the mesosilicalite nanocarrier of claim 1 .

8. The pharmaceutical composition of claim 7 , wherein the platinum(II) complex is at least one selected from the group consisting of cisplatin, carboplatin, oxaliplatin, nedaplatin, triplatin tetranitrate, phenanthriplatin, picoplatin, and strataplatin.

9. The pharmaceutical composition of claim 7 , wherein the platinum(II) complex is cisplatin.

10. The pharmaceutical composition of claim 7 , wherein the mesosilicalite nanocarrier loaded with the platinum(II) complex at a loading of in the range of about 0.011 to mmol of 0.9 mmol of platinum(II) complex per gram of nanocarrier.

11. The pharmaceutical composition of claim 7 , further comprising a chemotherapeutic agent.

12. The pharmaceutical composition of claim 7 , further comprising one or more carriers and/or excipients selected from the group consisting of a buffer, an inorganic salt, a fatty acid, a vegetable oil, a synthetic fatty ester, a surfactant, a sugar, a polymer, and combinations thereof.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Balasamy Rabindran Jermy
• Acharya Sadananda
• Ravinayagam Vijaya

Classifications

• A61P35/00

  Antineoplastic agents · CPC title

• B82Y5/00

  Nanobiotechnology or nanomedicine, e.g. protein engineering or drug delivery · CPC title

• A61K33/243 Primary

  Platinum; Compounds thereof · CPC title

• A61K31/282

  Platinum compounds · CPC title

• A61K9/5115

  Inorganic compounds · CPC title