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Expression of SCC-S2, an antiapoptotic molecule, correlates with enhanced proliferation and tumorigenicity of MDA-MB 435 cells.

Abstract：

:SCC-S2/GG2-1/NDED is a recently discovered antiapoptotic molecule induced by the activation of the transcription factor NF-kappaB. Here we have examined a role of SCC-S2 in cell growth regulation in vitro and in vivo. Western blotting using an antipeptide antibody revealed endogenous SCC-S2 as a approximately 21 kDa cytosolic protein in human breast cancer cells (MDA-MB 231) and renal carcinoma cells (RCC-RS). The immunofluorescence detection method showed the cytosolic localization of FLAG-tagged human SCC-S2 in COS-1 transfectants. MDA-MB 435 human cancer cells stably transfected with the FLAG-tagged SCC-S2 cDNA exhibited increased growth rate as compared to control vector transfectants, as measured by the cell viability (>twofold; n=3; P<0.005) and thymidine-labeling procedures ( approximately sixfold; n=3; P<0.0001). SCC-S2 transfectants also displayed an increase in cell migration in collagen I as compared to control transfectants ( approximately twofold; n=3; P<0.005). In athymic mice, SCC-S2 transfectants showed significantly enhanced tumor growth as compared to control transfectants (mean tumor volumes, day 16: control, 56.86+/-19.82 mm(3); SCC-S2, 127.54+/-18.78 mm(3); n=5; P<0.03). The examination of a limited number of clinical specimens revealed higher expression levels of SCC-S2 protein in certain human tumor tissues as compared to the matched normal adjacent tissues. Taken together, the present studies demonstrate SCC-S2 as a novel oncogenic factor in cancer cells.

journal_name

Oncogene

journal_title

Oncogene

authors

Kumar D,Gokhale P,Broustas C,Chakravarty D,Ahmad I,Kasid U

doi

10.1038/sj.onc.1207123

subject

Has Abstract

pub_date

2004-01-15 00:00:00

pages

612-6

issue

2

eissn

0950-9232

issn

1476-5594

pii

1207123

journal_volume

23

pub_type

杂志文章

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