Ca2+ and calmodulin are involved in the processes conferring stability to DNA in proliferating neoplastic cells.

Abstract:

:We have examined, in proliferating neoplastic cells, the effect on DNA of EGTA (a chelator of Ca2+) and W7 (an inhibitor of calmodulin). The treatment results in release of single-stranded DNA fragments (2-10 kb) from pre-labelled HMW DNA. When DNA from synchronized neoplastic cells in S phase is examined, almost all pre-labelled DNA appears as short fragments. However, fragmentation does not occur in growth-arrested cells or in normal cells. Furthermore, fragmentation can be prevented by incubating cells in excessive amounts of Ca2+. Hence Ca2+ and the Ca2+-binding protein calmodulin are involved in the processes conferring stability to DNA in proliferating neoplastic cells.

journal_name

Int J Cancer

authors

Lönn U,Lönn S

doi

10.1002/ijc.2910370615

subject

Has Abstract

pub_date

1986-06-15 00:00:00

pages

891-6

issue

6

eissn

0020-7136

issn

1097-0215

journal_volume

37

pub_type

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