title: KDM4/JMJD2 histone demethylases: epigenetic regulators in cancer cells.
abstract: Lysine methylation is one of the most prominent histone posttranslational modifications that regulate chromatin structure. Changes in histone lysine methylation status have been observed during cancer formation, which is thought to be a consequence of the dysregulation of histone lysine methyltransferases or the opposing demethylases. KDM4/JMJD2 proteins are demethylases that target histone H3 on lysines 9 and 36 and histone H1.4 on lysine 26. This protein family consists of three ~130-kDa proteins (KDM4A-C) and KDM4D/JMJD2D, which is half the size, lacks the double PHD and Tudor domains that are epigenome readers and present in the other KDM4 proteins, and has a different substrate specificity. Various studies have shown that KDM4A/JMJD2A, KDM4B/JMJD2B, and/or KDM4C/JMJD2C are overexpressed in breast, colorectal, lung, prostate, and other tumors and are required for efficient cancer cell growth. In part, this may be due to their ability to modulate transcription factors such as the androgen and estrogen receptor. Thus, KDM4 proteins present themselves as novel potential drug targets. Accordingly, multiple attempts are under way to develop KDM4 inhibitors, which could complement the existing arsenal of epigenetic drugs that are currently limited to DNA methyltransferases and histone deacetylases.
authors: Department of Cell Biology and Peggy and Charles Stephenson Cancer Center, University of Oklahoma Health Sciences Center, Oklahoma City, OK 73104, USA.
authors: William L
authors: WL
authors: Berry
authors: Ralf
authors: R
authors: Janknecht
mesh_terms: D000818:Animals; D044127:Epigenesis, Genetic; D006801:Humans; D056484:Jumonji Domain-Containing Histone Demethylases / Q000037:antagonists & inhibitors / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D009369:Neoplasms / Q000188:drug therapy / Q000201:enzymology* / Q000235:genetics
chemical_list: D056484:Jumonji Domain-Containing Histone Demethylases; C494424:KDM4A protein, human
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