Combined de‐repression of chemoresistance associated mitogen‐activated protein kinase 14 and activating transcription factor 2 by loss of microrna‐622 in hepatocellular carcinoma

Fritz V, Malek L, Gaza A, Wormser L, Appel M, Kremer A, Thasler WE, Neurath M, Hellerbrand C, Boßerhoff AK, Dietrich P, Siebler J (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Cancers MDPI

Book Volume: 13

Pages Range: 1-14

Article Number: 1183

Journal Issue: 5

DOI: 10.3390/cancers13051183

Abstract

Chemoresistance is a major hallmark driving the progression and poor prognosis of hepatocellular carcinoma (HCC). Limited chemoresponse of HCC was demonstrated to be mediated by mitogen‐activated protein kinase 14 (MAPK14) and activating transcription factor 2 (ATF2). Recently, we have demonstrated loss of control of RAS‐RAF‐ERK‐signaling as a consequence of miR‐622 downregulation in HCC. However, the majority of target genes of this potent tumorsuppressive microRNA had remained elusive. The MAPK14‐ATF2‐axis represents a collateral pathway ensuring persisting ERK‐activation in the presence of sorafenib‐mediated RAF-inhibition. In contrast to the function of the MAPK14‐ATF2‐axis, both the expression and regulation of MAPK14 and ATF2 in human HCC remained to be clarified. We found combined overexpression of MAPK14 and ATF2 in human HCC cells, tissues and in sorafenib resistant cell lines. High expression of MAPK14 and ATF2 was associated with reduced overall survival in HCC patients. Deciphering the molecular mechanism promoting combined upregulation of MAPK14 and ATF2 in HCC, we revealed that miR‐622 directly targets both genes, resulting in combined de‐repression of the MAPK14‐ATF2‐axis. Together, miR‐622 represents a superior regulator of both RAS‐RAF‐ERK as well as MAPK14‐ATF2‐signaling pathways in liver cancer.

Authors with CRIS profile

Valerie Fritz Lehrstuhl für Biochemie und Molekulare Medizin Anne Gaza Medizinische Fakultät Laura Wormser Lehrstuhl für Biochemie und Molekulare Medizin Andreas Kremer Department of Medicine 1 – Gastroenterology, Pneumology and Endocrinology Markus Neurath Lehrstuhl für Innere Medizin I Claus Hellerbrand Professur für Biochemie und Molekulare Pathobiologie Anja Katrin Boßerhoff Lehrstuhl für Biochemie und Molekulare Medizin Peter Dietrich Lehrstuhl für Biochemie und Molekulare Medizin Jürgen Siebler Professur für Hepatologie

Additional Organisation(s)

Interdisziplinäres Zentrum für Klinische Forschung

Related research project(s)

D032: The role of neuropeptide Y in chemo-resistance and immune checkpoint inhibition in hepatocellular carcinoma March 1, 2020 - Feb. 28, 2023

Involved external institutions

Rotkreuzklinikum München DE Germany (DE)

How to cite

APA:

Fritz, V., Malek, L., Gaza, A., Wormser, L., Appel, M., Kremer, A.,... Siebler, J. (2021). Combined de‐repression of chemoresistance associated mitogen‐activated protein kinase 14 and activating transcription factor 2 by loss of microrna‐622 in hepatocellular carcinoma. Cancers, 13(5), 1-14. https://doi.org/10.3390/cancers13051183

MLA:

Fritz, Valerie, et al. "Combined de‐repression of chemoresistance associated mitogen‐activated protein kinase 14 and activating transcription factor 2 by loss of microrna‐622 in hepatocellular carcinoma." Cancers 13.5 (2021): 1-14.

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