Cytolytic activity of circulating human monocytes on transformed and untransformed human fibroblasts.

Abstract:

:Monocytes from the peripheral blood of 10 normal adult human donors were tested for their cytolytic activity on untransformed or SV40-transformed, early passage, human fibroblasts. Two pairs of human fibroblast lines (2303 and SV40-2303, 2931 and SV40-2931) were used and lysis was assessed in terms of release of [3H]thymidine from prelabelled target cells over a 72-h incubation period. High levels of cytolytic activity were consistently observed on transformed fibroblasts at attacker to target cell (A:T) ratios ranging from 5:1 to 40:1. Low, but significant, lysis of untransformed cells was observed only with two donors at the highest (40:1) A:T ratio tested. With all donors, the cytolytic activity on transformed lines was significantly greater than on untransformed fibroblasts. Thus natural human monocyte-mediated cytotoxicity is preferentially expressed on transformed, as compared to untransformed, cells although sparing of the latter is not absolute.

journal_name

Int J Cancer

authors

Mantovani A,Tagliabue A,Dean JH,Jerrells TR,Herberman RB

doi

10.1002/ijc.2910230106

subject

Has Abstract

pub_date

1979-01-15 00:00:00

pages

28-31

issue

1

eissn

0020-7136

issn

1097-0215

journal_volume

23

pub_type

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