Mitochondrial defect-responsive gene signature in liver-cancer progression.
Mitochondrial respiratory defect is a key bioenergetics feature of hepatocellular carcinoma (HCC) cells. However, their involvement and roles in HCC development and progression remain unclear. Recently, we identified 10 common mitochondrial defect (CMD) signature genes that may be induced by retrograde signaling-mediated transcriptional reprogramming in response to HCC mitochondrial defects. HCC patients with enriched expression of these genes had poor prognostic outcomes, such as shorter periods of overall survival and recurrence-free survival. Nuclear protein 1 (NUPR1), a key transcription regulator, was up-regulated by Ca++-mediated retrograde signaling. NUPR1-centric network analysis and a biochemical promoter-binding assay demonstrated that granulin (GRN) is a key downstream effector of NUPR1 for the regulation of HCC cell invasiveness; association analysis of the NUPR1-GRN pathway supported this conclusion. Mitochondrial respiratory defects and retrograde signaling thus play pivotal roles in HCC progression, highlighting the potential of the NUPR1-GRN axis as a novel diagnostic marker and therapeutic target for HCC.
Departments of Biochemistry, Ajou University School of Medicine, Suwon 16499; Department of Biomedical Science, Graduate School, Ajou University, Suwon 16499, Korea.
Young-Kyoung
YK
Lee
Departments of Physiology, Ajou University School of Medicine, Suwon 16499; Department of Biomedical Science, Graduate School, Ajou University, Suwon 16499, Korea.
Hyun Goo
HG
Woo
Departments of Biochemistry, Ajou University School of Medicine, Suwon 16499; Department of Biomedical Science, Graduate School, Ajou University, Suwon 16499, Korea.
Gyesoon
G
Yoon
D051792:Basic Helix-Loop-Helix Proteins / Q000235:genetics / Q000378:metabolism; D045744:Cell Line, Tumor; D018450:Disease Progression; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000235:genetics / Q000378:metabolism; D008113:Liver Neoplasms / Q000235:genetics* / Q000378:metabolism; D008930:Mitochondria, Liver / Q000235:genetics* / Q000378:metabolism; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism; D011379:Prognosis; D000077153:Progranulins; D015398:Signal Transduction; D059467:Transcriptome
D051792:Basic Helix-Loop-Helix Proteins; D036341:Intercellular Signaling Peptides and Proteins; D009363:Neoplasm Proteins; D000077153:Progranulins; C491643:NUPR1 protein, human