Transglutaminase 2 protects against ischemic stroke.

Journal Article

Transglutaminase 2 (TG2) is a multifunctional protein that modulates cell survival and death pathways. It is upregulated in numerous ischemic models, and protects primary neurons from oxygen and glucose deprivation. TG2 binds to the hypoxia inducible factor (HIF) 1beta and decreases the upregulation of hypoxic-induced proapoptotic genes. To investigate the role of TG2 in ischemic stroke in vivo, we used the murine, permanent middle cerebral artery (MCA) ligation model. TG2 mRNA levels are increased after MCA ligations, and transgenic mice that express human TG2 in neurons had significantly smaller infarct volumes than wild type littermates. Further, TG2 translocates into the nucleus within 2h post ligation. Nuclear-localized TG2 is also apparent in human stroke cases. TG2 suppressed the upregulation of the HIF-induced, proapoptotic gene, Noxa. The findings of this study indicate that TG2 plays a role in attenuating ischemic-induced cell death possibly by modulating hypoxic-induced transcriptional processes.

Full Text

Duke Authors

Cited Authors

  • Filiano, AJ; Tucholski, J; Dolan, PJ; Colak, G; Johnson, GVW

Published Date

  • September 2010

Published In

Volume / Issue

  • 39 / 3

Start / End Page

  • 334 - 343

PubMed ID

  • 20451610

Electronic International Standard Serial Number (EISSN)

  • 1095-953X

International Standard Serial Number (ISSN)

  • 0969-9961

Digital Object Identifier (DOI)

  • 10.1016/j.nbd.2010.04.018

Language

  • eng