Ursodeoxycholic acid inhibits glioblastoma progression via endoplasmic reticulum stress related apoptosis and synergizes with the proteasome inhibitor bortezomib.

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ID: 102695
2020
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Abstract
Ursodeoxycholic acid (UDCA) has demonstrated cancer suppressive potential in several tumors. Here, we investigated the antitumor potential and biochemical mechanism of UDCA on glioblastoma multiforme (GBM), the deadliest form of brain cancer with a median survival of 15 months. Cell viability was assessed using the CCK-8 and colony forming assays. Expression profiles were obtained using RNA sequencing, PCR and western blot were used to validate changes in related markers at the RNA and protein levels. Flow cytometry was used to examine cell cycle, apoptosis, mitochondrial membrane potential (MMP) and reactive oxygen species (ROS). UDCA inhibited GBM cell viability in a dose- and time-dependent manner. Flow cytometry demonstrated that cells were arrested in the G1 phase and underwent apoptosis. The RNA sequencing results showed UDCA treatment in part targeted gene expression related to mitochondria and endoplasmic reticulum (ER). UDCA indeed led to decreased MMP, overproduction of ROS and ER stress. Three critical ER stress sensors ATF6, IRE1 and PERK were increased in the acute phase. Additionally, combining UDCA with the proteasome inhibitor bortezomib (BTZ) achieved a synergistic effect through enhancing the PERK/ATF4/CHOP pathway and protracting ER stress. UDCA inhibited GBM progression and the combination with BTZ achieved a synergistic effect via protracted ER stress. Thus, UDCA, alone or with combination of BTZ, shows promise as a possible therapeutic agent for the treatment of GBM.
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yao2020ursodeoxycholicacs Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Yao, Zhong;Zhang, Xun;Zhao, Feihu;Wang, Shuai;Chen, Anjing;Huang, Bin;Wang, Jian;Li, Xingang;
Journal ACS chemical neuroscience
Year 2020
DOI
10.1021/acschemneuro.0c00095
URL
Keywords
immunosensor macrocycles surface plasmon resonance resorc[4]arene site directed immobilization

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