-Original-

Interleukin 6 Enhances Glycolysis through Expression of the Glycolytic Enzymes Hexokinase 2 and 6-Phosphofructo-2-kinase/Fructose-2,6-bisphosphatase-3

Masaru Ando, Ikuno Uehara, Kayo Kogure, Yumi Asano, Wataru Nakajima, Yoshinori Abe, Keiko Kawauchi and Nobuyuki Tanaka

Department of Molecular Oncology, Graduate School of Medicine, Nippon Medical School

Enhanced glycolysis is important for oncogenesis and for the survival and proliferation of cancer cells in the tumor microenvironment. Recent studies have also shown that proinflammatory cytokine signaling, such as that mediated by nuclear factor κB and signal transducer and activator of transcription 3 (STAT3), is important for the generation of inflammation-associated tumors. However, the link between inflammation and enhanced glycolysis has not been identified. In the present study, we found that the proinflammatory cytokine interleukin (IL)-6 enhanced glycolysis in mouse embryonic fibroblasts and human cell lines. Moreover, STAT3 activated by IL-6 enhanced the expression of the glycolytic enzymes hexokinase 2 and 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase-3 (PFKFB3). Ectopic expression of PFKFB3 enhanced glycolysis, suggesting that the IL-6-STAT3 pathway enhances glycolysis through the induction of these enzymes. Our findings may provide a novel mechanism for inflammation-associated oncogenesis.

J Nippon Med Sch 2010; 77: 97-105

Keywords
interleukin 6, STAT3, glycolysis, hexokinase 2, 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase-3

Correspondence to
Nobuyuki Tanaka, Department of Molecular Oncology, Institute of Gerontology, Nippon Medical School, 1-396 Kosugi-cho, Nakahara-ku, Kawasaki 211-8533, Japan
nobuta@nms.ac.jp

Received, November 25, 2009
Accepted, December 14, 2009