ABSTRACT
Purpose
The present work focuses on design and development of surface functionalized LCNPs for improving tumor delivery of DTX.
Methods
Phytantriol based “stealth” LCNPs were prepared using hydrotrope method and optimized. The potential of developed formulation was further assessed using cell culture experiments, in vivo pharmacokinetics, in vivo pharmacodynamics and toxicity studies.
Results
A biphasic drug release pattern was observed with sustained release of drug till 72 h. In vitro cell culture experiments revealed efficient internalization within MCF-7 cells with 25.80-fold decrease in IC50 value for PEG-LCNPs as compared to free DTX. Mechanistic insights demonstrated preferential co-localization of LCNPs in the vicinity of the nucleus. Furthermore, in vivo pharmacokinetic studies revealed 14.45-fold enhancement in circulation half-life of PEG-LCNPs as compared to marketed formulation Taxotere®. In vivo efficacy studies PEG-LCNPs in DMBA induced breast cancer model revealed ~81% reduction in the tumor burden compared to Taxotere® which caused/achieve only 47% reduction or showed only 47% decrease. Furthermore, safety profile was noted for PEG-LCNPs as compared to Taxotere®, measured as a function of hepato- and nephro-toxicity.
Conclusions
Surface functionalization of LCNPsis a viable approach for improving the therapeutic potential of DTX.
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Abbreviations
- ALT:
-
Alanine aminotransferase
- AST:
-
Aspartate aminotransferase
- AUC:
-
Area under curve
- BUN:
-
Blood urea nitrogen
- CLSM:
-
Confocal laser scanning microscope
- CoQ10:
-
Coenzyme Q 10
- DAPI:
-
4′,6-diamidino-2-phenylindole
- DMBA:
-
7,12-dimethylbenz[a]anthracene
- DSPE:
-
1, 2-Distearoyl-sn-glycero-3-phospho-ethanolamine
- DTX:
-
Docetaxel
- EPR:
-
Enhanced permeation and retention
- FBS:
-
Fetal bovine serum
- FDA:
-
Food and Drugs Administration
- GMO:
-
Glyceryl monooleate
- HBSS:
-
Hanks’s balanced salt solution
- IAEC:
-
Institutional animal ethics committee
- ICH:
-
International conference on harmonization
- LCNPs:
-
Liquid crystalline nanoparticles
- MCF-7:
-
Human adenocarcinoma breast cancer cell line
- MRT:
-
Mean residence time
- MTT:
-
(3-(4,5-Dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide)
- PDI:
-
Polydispersity index
- PEG:
-
Polyethylene glycol
- SAXS:
-
Small angle X ray spectroscopy
- TEM:
-
Transmission electron microscopy
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ACKNOWLEDGMENTS AND DISCLOSURES
The authors are thankful to Director, NIPER for financial support, necessary infrastructure and facilities. N.K.S and K.T. are grateful to Council of Scientific and Industrial Research (CSIR), GOI, New Delhi, for providing research fellowships. The technical support rendered by Mr. Rahul Mahajan is also duly acknowledged.
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This work is a part of Indian Patent Application No. 680/DEL/2013 filed on March 08 2013
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Jain, S., Bhankur, N., Swarnakar, N.K. et al. Phytantriol Based “Stealth” Lyotropic Liquid Crystalline Nanoparticles for Improved Antitumor Efficacy and Reduced Toxicity of Docetaxel. Pharm Res 32, 3282–3292 (2015). https://doi.org/10.1007/s11095-015-1706-2
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DOI: https://doi.org/10.1007/s11095-015-1706-2