Metabolic Reprogramming of Cancer-Associated Fibroblasts by IDH3α Downregulation

Daoxiang Zhang; Yongbin Wang; Zhimin Shi; Jingyi Liu; Pan Sun; Xiaodan Hou; Jian Zhang; Shimin Zhao; Binhua P. Zhou; Jun Mi

doi:10.1016/j.celrep.2015.02.006

Cell Reports (Mar 2015)

Metabolic Reprogramming of Cancer-Associated Fibroblasts by IDH3α Downregulation

Daoxiang Zhang,
Yongbin Wang,
Zhimin Shi,
Jingyi Liu,
Pan Sun,
Xiaodan Hou,
Jian Zhang,
Shimin Zhao,
Binhua P. Zhou,
Jun Mi

Affiliations

Daoxiang Zhang: Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
Yongbin Wang: Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
Zhimin Shi: Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
Jingyi Liu: Markey Cancer Center, University of Kentucky, College of Medicine, 800 Rose Street, Lexington, KY 40536, USA
Pan Sun: Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
Xiaodan Hou: Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
Jian Zhang: Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China
Shimin Zhao: School of Life Sciences, Fudan University, 220 Handan Road, Shanghai 200433, China
Binhua P. Zhou: Markey Cancer Center, University of Kentucky, College of Medicine, 800 Rose Street, Lexington, KY 40536, USA
Jun Mi: Department of Biochemistry and Molecular Cell Biology, Shanghai Key Laboratory of Tumor Microenvironment and Inflammation, Shanghai Jiao Tong University School of Medicine, 280 South Chongqing Road, Shanghai 200025, China

DOI: https://doi.org/10.1016/j.celrep.2015.02.006
Journal volume & issue: Vol. 10, no. 8
pp. 1335 – 1348

Abstract

Read online

Cancer-associated fibroblasts (CAFs) provide critical metabolites for tumor growth and undergo metabolic reprogramming to support glycolysis. However, the molecular mechanisms responsible for this change remain unclear. Here, we report that TGF-β1- or PDGF-induced CAFs switch from oxidative phosphorylation to aerobic glycolysis. We identify downregulation of isocitrate dehydrogenase 3α (IDH3α) as a marker for this switch. Furthermore, miR-424 downregulates IDH3α during CAF formation. Downregulation of IDH3α decreases the effective level of α-ketoglutarate (α-KG) by reducing the ratio of α-KG to fumarate and succinate, resulting in PHD2 inhibition and HIF-1α protein stabilization. The accumulation of HIF-1α, in turn, promotes glycolysis by increasing the uptake of glucose, upregulating expression of glycolytic enzymes under normoxic conditions, and inhibiting oxidative phosphorylation by upregulating NDUFA4L2. CAFs from tumor samples exhibit low levels of IDH3α, and overexpression of IDH3α prevents transformation of fibroblasts into CAFs. Our studies reveal IDH3α to be a critical metabolic switch in CAFs.

Published in Cell Reports

ISSN: 2211-1247 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Biology (General)
Website: http://www.cell.com/cell-reports/home

About the journal