Drug-Polymer Interaction, Pharmacokinetics and Antitumor Effect of PEG-PLA/Taxane Derivative TM-2 Micelles for Intravenous Drug Delivery.
Pharm Res 2018;
35:208. [PMID:
30215146 DOI:
10.1007/s11095-018-2477-3]
[Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 08/07/2018] [Indexed: 10/28/2022]
Abstract
PURPOSE
A novel polymer micelle was prepared with a high drug loading, good stability, high tolerance and better anti-tumor effect.
METHODS
TM-2 was encapsulated in poly-block-poly (D, L-lactic acid) self-assembled micelles by the thin-film hydration method. From the critical micelle concentrations of the copolymers, particle size, drug loading and encapsulation efficiency of drug-loading micelles, the appropriate polymer material could be assessed. Comparisons between TM-2 solution and TM-2 micelles were done to evaluate the pharmacokinetics and toxicity in rats, compared with Taxol to evaluate the anti-tumor effect in mice.
RESULTS
The optimized TM-2 micelles achieved a high drug loading (~20%) with the polymer material of PEG2k-PLA2.5k, with a particle size of 30 nm and no significant change in particle size after lyophilization. The result of pharmacokinetic experiment displayed that the half-life in vivo was obviously prolonged. The maximum tolerated dose of TM-2 micelles was approximately 25 mg/kg in rats, and the relative tumor growth rate of Taxol (15 mg/kg), TM-2 (10 mg/kg), TM-2 (15 mg/kg) and TM-2 (40 mg/kg) in mice were 49.35%, 49.14%, 36.44 and 9.98% respectively.
CONCLUSIONS
TM-2 micelles with high drug loading increased drug solubility, improved tolerance, antitumor effects and reduced toxicity.
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