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Research article
Manyi Yang
Central South University First Hospital: Xiangya Hospital Central South University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-7341-7232
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This work is licensed under a CC BY 4.0 License. Read Full License
Background This research aims to examine the mechanism of glycochenodeoxycholate (GCDA)-mediated survival and drug-resistance in hepatocellular carcinoma cells (HCC). Extracellular signal-regulated kinase 1/2 (ERK1/2) were extensively expressed in liver cancer cells.
Methods GCDA-induced survival of human liver carcinoma cells and chemoresistance was determined by CCK8 and flow cytometry, respectively. Functional of ERK1/2 and interaction of Bcl-2 family members was determined in western blot and immunofluorescence.
Results Silencing ERK1/2 by RNA interference suppressed GCDA-stimulated survival and promoted apoptosis. Furthermore, phosphorylation of endogenous ERK1/2 could be potently stimulated by GCDA in combination with enhanced chemoresistance in QGY-7703 hepatocellular carcinoma cells. And such GCDA-mediated proliferation and chemoresistance could be impaired by PD98059, who acts as an inhibitor to block phosphorylation of ERK1/2. Mechanistically, PD98059 was able to potently suppress GCDA-stimulated nuclear aggregation of ERK1/2 and p-ERK1/2, up-regulation of pro-survival protein Mcl-1 and decrease of pro-apoptotic protein Bim.
Conclusions Our work verified the function of ERK1/2 in GCDA-induced chemoresistance in hepatocellular carcinoma cells. Disruption of ERK1/2 by blocking phosphorylation or nuclear translocation may put forward new methods for treating of GCDA-related proliferation and drug-resistance in liver cancer.
Keywords
Hepatocellular carcinoma cells, Glycochenodeoxycholate, Extracellular signal-regulated kinase 1/2
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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Research article
Manyi Yang
Central South University First Hospital: Xiangya Hospital Central South University
Corresponding Author
ORCiD: https://orcid.org/0000-0002-7341-7232
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
History
CURRENT STATUS: Posted
Version 1
Posted 25 Jan, 2021
No community comments so far
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Molecular Genetics
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Background This research aims to examine the mechanism of glycochenodeoxycholate (GCDA)-mediated survival and drug-resistance in hepatocellular carcinoma cells (HCC). Extracellular signal-regulated kinase 1/2 (ERK1/2) were extensively expressed in liver cancer cells.
Methods GCDA-induced survival of human liver carcinoma cells and chemoresistance was determined by CCK8 and flow cytometry, respectively. Functional of ERK1/2 and interaction of Bcl-2 family members was determined in western blot and immunofluorescence.
Results Silencing ERK1/2 by RNA interference suppressed GCDA-stimulated survival and promoted apoptosis. Furthermore, phosphorylation of endogenous ERK1/2 could be potently stimulated by GCDA in combination with enhanced chemoresistance in QGY-7703 hepatocellular carcinoma cells. And such GCDA-mediated proliferation and chemoresistance could be impaired by PD98059, who acts as an inhibitor to block phosphorylation of ERK1/2. Mechanistically, PD98059 was able to potently suppress GCDA-stimulated nuclear aggregation of ERK1/2 and p-ERK1/2, up-regulation of pro-survival protein Mcl-1 and decrease of pro-apoptotic protein Bim.
Conclusions Our work verified the function of ERK1/2 in GCDA-induced chemoresistance in hepatocellular carcinoma cells. Disruption of ERK1/2 by blocking phosphorylation or nuclear translocation may put forward new methods for treating of GCDA-related proliferation and drug-resistance in liver cancer.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
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