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001-es BibID:BIBFORM060614
Első szerző:Balajthy Zoltán (biokémikus, sejtbiológus)
Cím:Lack of induction of tissue transglutaminase but activation of the preexisting enzyme in c-myc-induced apoptosis of CHO Cells / Zoltán Balajthy, Noémi Kedei, László Nagy, Peter J. A. Davies, László Fésüs
Dátum:1997
ISSN:0006-291X
Megjegyzések:The intracellular activity and expression of tissue transglutaminase, which crosslinks proteins through ?(γ-glutamyl)lysine isodipeptide bond, was investigated in CHO cells and those stably transfected with either inducible c-Myc (which leads to apoptosis) or with c-myc and the apoptosis inhibitor Bcl-2. Protein-bound cross-link content was significantly higher when apoptosis was induced by c-Myc while the concomitant presence of Bcl-2 markedly reduced both apoptosis and enzymatic protein cross-linking. The expression of tissue transglutaminase did not change following the initiation of apoptosis by c-Myc or when it was blocked by Bcl-2. Studying transiently co-transfected elements of the mouse tissue transglutaminase promoter linked to a reporter enzyme revealed their overall repression in cells expressing c-Myc. This repression was partially suspended in cells also carrying Bcl-2. Our data suggest that tissue transglutaminase is not induced when c-Myc initiates apoptosis but the pre-existing endogenous enzyme is activated.
Tárgyszavak:Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Biochemical and Biophysical Research Communications 236 : 2 (1997), p. 280-284. -
További szerzők:Kedei Noémi Nagy László (1966-) (molekuláris sejtbiológus, biokémikus) Davies, Peter J. A. Fésüs László (1947-) (orvos biokémikus)
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