NDLI: Murine double minute gene 2 (MDM2) promoted hepatocellular carcinoma (HCC) cell growth by targeting fructose-1,6-bisphosphatase (FBP1) for degradation

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Murine double minute gene 2 (MDM2) promoted hepatocellular carcinoma (HCC) cell growth by targeting fructose-1,6-bisphosphatase (FBP1) for degradation

Content Provider	Tech Science Press
Author	Wu, Bin Liu, Longgen Jiang, Jiakai Xu, Suobao Zhang, Sheng Yang, Jing Xu, Yao
Abstract	To study the roles and association of murine double minute gene 2 (MDM2) and fructose-1,6-biphosphatase (FBP1) in human hepatocellular carcinoma (HCC), growth response of human HCC cells was assessed using proliferation and apoptosis assay. Pro-survival AKT signaling associated proteins (p-AKT, survivin and cleaved caspase 3) were assessed using western blotting. The correlation between MDM2 and FBP1 was assessed using co-immunoprecipitation combined with ubiquitination assay. Our data suggested that low expression of FBP1 was correlated with high levels of MDM2 in HCC cell lines (Huh7 and Hep3B). Overexpression of FBP1 resulted in anti-proliferation, pro-apoptosis, the up-regulation of cleaved caspase 3 while the downregulation of survivin and phosphor (p)-AKT, however, knockdown of FBP1 led to the opposite. Furthermore, overexpression of MDM2 potently reversed FBP1-induced proliferation inhibition and apoptosis, while Nutlin-3 (an MDM2 inhibitor) reversed the change trends induced by FBP1 knockdown in the aforementioned events. Lastly, but not least importantly, our data elucidated that MDM2 binds directly to FBP1 and promotes FBP1 ubiquitination. In conclusion, our data firstly suggested the involvement of FBP1 and its association with MDM2 in HCC cell growth. MDM2-FBP1-regulated HCC cell growth and the activation of AKT were mediated, at least in part, through FBP1 degradation.
Related Links	https://www.techscience.com/biocell/v46n6/46683
Starting Page	1483
Ending Page	1491
ISSN	03279545
DOI	10.32604/biocell.2022.017745
Issue Number	6
Journal	BIOCELL (BIOCELL)
Volume Number	46
e-ISSN	16675746
Language	English
Publisher Date	2022-02-07
Access Restriction	Open
Subject Keyword	MDM2 FBP1 ubiquitination Human hepatocellular carcinoma FBP1
Content Type	Text
Resource Type	Article
Subject	Cell Biology

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