Hypoxia-induced HIF1α Targets in Melanocytes Reveal a Molecular Profile Associated with Poor Melanoma Prognosis

Overview

Journal Pigment Cell Melanoma Res

Date 2017 Feb 8

PMID 28168807

Citations 26

Authors

Stacie K Loftus

Laura L Baxter

Julia C Cronin

Temesgen D Fufa

William J Pavan

Affiliations

Soon will be listed here.

Abstract

Hypoxia and HIF1α signaling direct tissue-specific gene responses regulating tumor progression, invasion, and metastasis. By integrating HIF1α knockdown and hypoxia-induced gene expression changes, this study identifies a melanocyte-specific, HIF1α-dependent/hypoxia-responsive gene expression signature. Integration of these gene expression changes with HIF1α ChIP-Seq analysis identifies 81 HIF1α direct target genes in melanocytes. The expression levels for 10 of the HIF1α direct targets - GAPDH, PKM, PPAT, DARS, DTWD1, SEH1L, ZNF292, RLF, AGTRAP, and GPC6 - are significantly correlated with reduced time of disease-free status in melanoma by logistic regression (P-value = 0.0013) and ROC curve analysis (AUC = 0.826, P-value < 0.0001). This HIF1α-regulated profile defines a melanocyte-specific response under hypoxia, and demonstrates the role of HIF1α as an invasive cell state gatekeeper in regulating cellular metabolism, chromatin and transcriptional regulation, vascularization, and invasion.

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