Effect of protease inhibitors on DNA amplification in SV40-transformed Chinese hamster embryo cells.

Abstract:

:We have examined the effect of protease inhibitors on radiation-induced DNA amplification in vitro using an SV40-transformed Chinese hamster embryo cell line. DNA from cells irradiated with X-rays (10 Gy) or ultraviolet radiation (8 J/m2) resulted in an 8-fold or greater amplification of SV40 sequences compared with unirradiated cells. Addition of antipain or the soybean-derived Bowman-Birk protease inhibitor (BBI) to the culture medium, either 75 min after X-irradiation or within 15 min after ultraviolet irradiation, resulted in a reduction of amplification levels. BBI was more effective than antipain at an equal concentration. These results suggest that a protease may be involved in DNA amplification.

journal_name

Cancer Lett

journal_title

Cancer letters

authors

Flick MB,Kennedy AR

doi

10.1016/0304-3835(91)90083-t

subject

Has Abstract

pub_date

1991-02-01 00:00:00

pages

103-8

issue

2

eissn

0304-3835

issn

1872-7980

pii

0304-3835(91)90083-T

journal_volume

56

pub_type

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