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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Abbreviations
- A549:
-
Human lung xenografts
- ACN:
-
Acetonitrile
- AUC:
-
Concentration-time curve
- BC:
-
Breast cancer
- Clz :
-
Plasma clearance
- Cmax :
-
Maximum plasma concentration
- CMC:
-
Critical micelle concentration
- CrEL:
-
Cremophor EL
- CYP:
-
Cytochrome P450 proteins
- DL:
-
Drug loading
- DLS:
-
Dynamic light scattering
- DMF:
-
N-N dimethylformamide
- DSC:
-
Differential scanning calorimetry
- EE:
-
Encapsulation efficiency
- FTIR:
-
Fourier Transform infrared spectroscopy
- GPC:
-
Gel permeation chromatography
- KB/VCR:
-
Human cervical adenocarcinoma resistant to vincristine
- MBC:
-
Metastatic breast cancer
- MCF:
-
7/ADR-Human breast cancer resistant to adriamycin
- MDR:
-
Multiple drug resistance
- MTD:
-
The maximum tolerable dose
- NSCLC:
-
Non-small cell lung cancer
- OC:
-
Ovarian cancer
- ODnc:
-
Negative control absorbance
- ODpc:
-
Positive control absorbance
- ODt:
-
Sample absorbance
- PBS:
-
Phosphate-buffered saline
- PDI:
-
Polydispersity index
- PEG:
-
PLA-Poly-block-poly (D, L-lactic acid)
- PSD:
-
Particle size distribution
- PSMA:
-
Prostate-specific membrane antigen
- PTX:
-
Paclitaxel
- RTV:
-
Relative tumor volume
- SD:
-
Male Sprague-Dawley
- T/C:
-
Relative tumor growth rate
- t1/2 :
-
Elimination half-life
- Taxol:
-
Commercial name of paclitaxel solution
- TEM:
-
Transmission electron microscopy
- Tmax :
-
Maximum plasma concentration
- Tween:
-
Polysorbate
- XRD:
-
X-ray diffraction
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Wang, Q., Liu, Y., Pu, C. et al. Drug-Polymer Interaction, Pharmacokinetics and Antitumor Effect of PEG-PLA/Taxane Derivative TM-2 Micelles for Intravenous Drug Delivery. Pharm Res 35, 208 (2018). https://doi.org/10.1007/s11095-018-2477-3
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DOI: https://doi.org/10.1007/s11095-018-2477-3