ナカノ ヒロヤス   Nakano Hiroyasu
  中野 裕康
   所属   東邦大学  医学部 医学科
   東邦大学  医学部 医学科
   職種   教授
論文種別 原著
言語種別 英語
査読の有無 査読あり
表題 Short form FLICE-inhibitory protein promotes TNFalpha-induced necroptosis in fibroblasts derived from CFLARs transgenic mice
掲載誌名 正式名:Biochem Biophys Res Commun
ISSNコード:1090-2104
出版社 Elsevier
巻・号・頁 480(1),23-28頁
著者・共著者 Shindo R, Yamazaki S, Ohmuraya M, Araki K, Nakano H.
発行年月 2016/11
概要 Cellular FLICE-inhibitory protein (cFLIP) is a catalytically inactive homolog of the initiator caspase, caspase 8 and blocks apoptosis through binding to caspase 8. Human CFLAR gene encodes two proteins, a long form cFLIP (cFLIPL) and a short form cFLIP (cFLIPs) due to an alternative splicing. Recent studies have shown that expression of cFLIPs, but not cFLIPL promotes programmed necrosis (also referred to as necroptosis) in an immortalized human keratinocyte cell line, HaCaT. Here, we found that expression of cFLIPs similarly promoted necroptosis in immortalized fibroblasts. To further expand this observation and exclude the possibility that immortalization process of keratinocytes or fibroblasts might affect the phenotype induced by cFLIPs expression, we generated human CFLARs transgenic (Tg) mice. Primary fibroblasts derived from CFLARs Tg mice were increased in susceptibility to TNFalpha-induced necroptosis, but not apoptosis compared to wild-type (WT) fibroblasts. Moreover, hallmarks of necroptosis, such as phosphorylation of receptor-interacting protein kinase (RIPK)1 and RIPK3, and oligomer formation of mixed lineage kinase domain-like (MLKL) were robustly induced in CFLARs Tg fibroblasts compared to wild-type fibroblasts following TNFalpha stimulation. Thus, cFLIPs-dependent promotion of necroptosis is not unique to immortalized keratinocytes or fibroblasts, but also to generalized to primary fibroblasts.
DOI 10.1016/j.bbrc.2016.10.015