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Perrin-Cocon, L.* ; Vidalain, P.O.* ; Jacquemin, C.* ; Aublin-Gex, A.* ; Olmstead, K. ; Panthu, B.* ; Rautureau, G.J.P.* ; André, P.* ; Nyczka, P.* ; Hütt, M.T.* ; Amoedo, N.* ; Rossignol, R.* ; Filipp, F.V. ; Lotteau, V.* ; Diaz, O.*

A hexokinase isoenzyme switch in human liver cancer cells promotes lipogenesis and enhances innate immunity.

Comm. Biol. 4:217 (2021)

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During the cancerous transformation of normal hepatocytes into hepatocellular carcinoma (HCC), the enzyme catalyzing the first rate-limiting step of glycolysis, namely the glucokinase (GCK), is replaced by the higher affinity isoenzyme, hexokinase 2 (HK2). Here, we show that in HCC tumors the highest expression level of HK2 is inversely correlated to GCK expression, and is associated to poor prognosis for patient survival. To further explore functional consequences of the GCK-to-HK2 isoenzyme switch occurring during carcinogenesis, HK2 was knocked-out in the HCC cell line Huh7 and replaced by GCK, to generate the Huh7-GCK+/HK2− cell line. HK2 knockdown and GCK expression rewired central carbon metabolism, stimulated mitochondrial respiration and restored essential metabolic functions of normal hepatocytes such as lipogenesis, VLDL secretion, glycogen storage. It also reactivated innate immune responses and sensitivity to natural killer cells, showing that consequences of the HK switch extend beyond metabolic reprogramming.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

ISSN (print) / ISBN 2399-3642

e-ISSN 2399-3642

Journal Communications Biology

Quellenangaben Volume: 4, Issue: 1, Article Number: 217

Publisher Springer

Publishing Place London

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Computational Biology (ICB)

Grants Fondation pour la Recherche Médicale (Foundation for Medical Research in France)
U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (NIGMS)
U.S. Department of Health & Human Services | NIH | National Cancer Institute (NCI)