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Methotrexate-loaded biodegradable polymeric micelles for lymphoma therapy
Meng Yao Wang1, Ying Qu1, Dan Rong Hu1
1Department of Hematology and Research Laboratory of Hematology, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, and Collaborative Innovation Center, Chengdu 610041, PR China.
International Journal of Pharmaceutics
|December 18, 2018
Summary
Methotrexate (MTX) loaded into MPEG-PCL micelles improves solubility and anti-tumor activity for lymphoma treatment. This novel formulation enhances drug delivery and efficacy, addressing key challenges in chemotherapy.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Oncology
Background:
- Drug resistance and recurrence are significant challenges in lymphoma chemotherapy.
- High-dose methotrexate (HD MTX) is effective but limited by poor solubility and severe side effects.
- Polymeric micelles offer a promising nano-delivery system to overcome these limitations.
Purpose of the Study:
- To develop and evaluate methotrexate (MTX)-loaded monomethyl poly (ethylene glycol)-poly (ε-caprolactone) (MPEG-PCL) micelles for enhanced lymphoma treatment.
- To assess the solubility, drug release, cellular uptake, and anti-tumor efficacy of the MTX-loaded micelles in vitro and in vivo.
Main Methods:
- MTX was loaded into MPEG-PCL micelles using a one-step solid dispersion method.
- Characterization included particle size, polydispersity index (PDI), drug loading, and encapsulation efficiency.
- In vitro studies involved drug release, MTT assays, apoptosis, and cellular uptake on Raji lymphoma cells.
- In vivo studies utilized a subcutaneous Raji lymphoma mouse model to evaluate anti-tumor effects and toxicity.
Main Results:
- MTX-loaded micelles exhibited a small particle size (25.64 nm) and high encapsulation efficiency (92.46%).
- The formulation demonstrated sustained in vitro drug release and significantly enhanced anti-proliferative and apoptosis-inducing effects on Raji cells compared to free MTX.
- In vivo studies showed superior tumor suppression and prolonged survival in mice treated with MTX-loaded micelles, with no additional toxicity observed.
- Cellular uptake of micelles was 1.5 times higher than free MTX.
Conclusions:
- MPEG-PCL-MTX micelles represent an effective, intravenously injectable formulation of MTX with improved solubility and enhanced anti-tumor activity.
- This nano-delivery system addresses clinical demands for HD MTX, offering a promising strategy for lymphoma chemotherapy.
- The formulation demonstrates significant potential for overcoming drug resistance and improving therapeutic outcomes in lymphoma treatment.
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