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Πέμπτη 11 Ιανουαρίου 2018

Hereditary kidney cancer syndromes: Genetic disorders driven by alterations in metabolism and epigenome regulation

Abstract

Although hereditary kidney cancer syndrome accounts for around five percent of all kidney cancers, the mechanistic insight into tumor development in these rare conditions has provided the foundation for the development of molecular targeting agents currently used for sporadic kidney cancer. In the late 1980s, the comprehensive study for hereditary kidney cancer syndrome was launched in the National Cancer Institute, U.S.A. and the first kidney cancer associated gene, VHL was identified through kindred analysis of von Hippel-Lindau syndrome in 1993. Subsequent molecular studies on VHL function have elucidated that the VHL protein is a component of E3 ubiquitin ligase complex for hypoxia-inducible factor (HIF), which provided basis for the development of tyrosine kinase inhibitors targeting the HIF-VEGF/PDGF pathway. Recent whole-exome sequencing analysis of sporadic kidney cancer exhibited the recurrent mutations in chromatin remodeling genes and the later study has revealed that several chromatin remodeling genes are altered in kidney cancer kindred at germline level. To date, more than 10 hereditary kidney cancer syndromes together with each responsible gene have been characterized and most of causative genes for these genetic disorders are associated with either metabolism or epigenome regulation. In this review article, we describe the molecular mechanisms how an alteration of each kidney cancer associated gene leads to renal tumorigenesis as well as denote therapeutic targets elicited by studies on hereditary kidney cancer.

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