Liu Z, Huang Z, Ci L, Lu L, Liu Z, Yan X, Yan Z, Yu L, Liu Y, Lu W. Co-administration of tLyp-1 with polymeric paclitaxel conjugates: Enhanced intratumoral accumulation and anti-tumor efficacy.
Pharmazie 2017;
72:205-208. [PMID:
29441988 DOI:
10.1691/ph.2017.6096]
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Abstract
BACKGROUND
It has been previously demonstrated that conjugation of paclitaxel to a linear poly(l-γ-glutamylglutamine) backbone can enhance water solubility of paclitaxel. However, intratumoral penetration of the nanoscale poly(l-γ-glutamylglutamine)-paclitaxel conjugate (PGG-PTX) was still limited due to dysfunctional tumor blood vessels as well as high interstitial pressure in the tumor microenvironment.
PURPOSE
The objective of the present research was to investigate the feasibility of co-administration of a tumor penetration enhancing peptide tLyp-1 for improving intratumoral accumulation and consequent anti-tumor efficacy of PGG-PTX.
METHODS
The influence of co-administration of tLyP-1 with PGG-PTX on intratumoral accumulation (via HPLC-MS/MS) and anti-tumor efficacy (by monitoring the change in the tumor volume) was investigated using a breast cancer (4T1) tumor-bearing mouse model. In addition, the systemic toxicity of co-administration of tLyP-1 with PGG-PTX was assessed by monitoring the change in the animal body weight.
RESULTS
It was observed that co-administration of tLyP-1 with PGG-PTX dramatically improved PGG-PTX accumulation in the tumors, resulting in improved inhibition efficiency against tumor growth. Moreover, co-administration of tLyP-1 with PGG-PTX did not change the systemic toxicity profile of PGG-PTX.
CONCLUSION
Co-administration of tLyp-1 may be a promising strategy for improving the passive tumortargeting performance of polymeric drug conjugates.
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