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Title: Necrosis has orderly DNA fragmentations
Authors: Kok, Y.-J. 
Swe, M. 
Sit, K.-H. 
Keywords: Commitment point
Megabase, kilobase, and 200 bp ladder fragmentations
Metameric GC motif clusters
Issue Date: 2002
Citation: Kok, Y.-J., Swe, M., Sit, K.-H. (2002). Necrosis has orderly DNA fragmentations. Biochemical and Biophysical Research Communications 294 (5) : 934-939. ScholarBank@NUS Repository.
Abstract: Necrosis from freezing manifested an orderly pattern of DNA fragmentations, including the apoptosis signature of 200 bp ladder, in three different cell populations, despite pancaspase suppression by zVAD-fmk. Immediately on thawing, all three populations had 100% dead cell indices and 2.2, 1.6, and 1.1 megabase fragmentations, which marked the point of death. Kilobase and 200 bp DNA ladder fragmentations manifested later together with overt necrotic morphologies. CpG oligodeoxynucleotides (ODNs) complementary to highly conserved GCn xGC motifs inhibited the megabase fragmentations and retarded their electrophoretic mobility (gel shift), indicating ODN-DNA binding, which is known to confer site-specific resistance to cleavage. Cleavage specificity was confirmed using EDTA-CpG ODN conjugates to direct free-radical-producing transitional element, vanadyl(4), to the binding sites to reproduce the megabase fragmentations in normal cells. Specific orderly fragmentations in necrosis suggested a necrosis-apoptosis convergence after death has been committed. © 2002 Elsevier Science (USA). All rights reserved.
Source Title: Biochemical and Biophysical Research Communications
ISSN: 0006291X
DOI: 10.1016/S0006-291X(02)00587-9
Appears in Collections:Staff Publications

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