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Metformin-conjugated micellar system with intratumoral pH responsive de-shielding for co-delivery of doxorubicin and nucleic acid.
Abstract A novel PMet-P(cdmPEG2K) polymeric micellar carrier was developed for tumor-targeted co-delivery of DOX and nucleic acids (NA), based on polymetformin and a structure designed to lose the PEG shell in response to the acidic extracellular tumor environment. NA/DOX co-loaded micelleplexes exhibited enhanced inhibition of cell proliferation compared to DOX-loaded micelles, and displayed a higher level of cytotoxicity at an acidic pH (6.8) which mimicks the tumor microenvironment. The PMet-P(cdmPEG2K) micelles achieved significantly improved transfection with either a reporter plasmid or Cy3-siRNA, and enhanc...
Source: Biochemical Pharmacology - February 2, 2021 Category: Drugs & Pharmacology Authors: Liu Y, Sun J, Huang Y, Chen Y, Li J, Liang L, Xu J, Wan Z, Zhang B, Li Z, Li S Tags: Biochem Pharmacol Source Type: research

The interplay of AMP‐activated protein kinase and androgen receptor in prostate cancer cells
Abstract AMP‐activated protein kinase (AMPK) has recently emerged as a potential target for cancer therapy due to the observation that activation of AMPK inhibits tumor cell growth. It is well‐known that androgen receptor (AR) signaling is a major driver for the development and progression of prostate cancer and that downregulation of AR is a critical step in the induction of apoptosis in prostate cancer cells. However, little is known about the potential interaction between AMPK and AR signaling pathways. In the current study, we showed that activation of AMPK by metformin caused decrease of AR protein level through s...
Source: Journal of Cellular Physiology - October 17, 2013 Category: Cytology Authors: Min Shen, Zhen Zhang, Manohar Ratnam, Q. Ping Dou Tags: Rapid Communication Source Type: research