A direct mechanistic link between growth control and a tumor cell immune function: increased interleukin-8 secretion accounts for elimination of Oct-1 antisense transformants from scid mice.

Abstract:

BACKGROUND:Tumorigenesis involves the aberrant function of proteins that regulate growth control, including Oct-1. Oct-1 is a DNA binding transcription factor that activates genes that encode proteins required for S-phase and cell growth. For example, Oct-1 activates the histone H2B promoter and the promoters for the snRNPs. Oct-1 also represses certain promoters, including promoters of immune function genes, such as the IL-8 and the HLA-DRA genes. MATERIALS, METHODS AND RESULTS:Oct-1 antisense transformants were determined to have reduced growth rates and other characteristics of growth control. Also, Oct-1 antisense transformants endured for a shorter time in scid mice, being attributable to the increased expression of IL-8 by the Oct-1 antisense transformants. CONCLUSION:These results may help resolve the conundrum of why growth control de-regulation alone is not enough for tumorigenicity. The results also support the conclusion that the molecular mechanisms of growth control de-regulation and tumor cell immune functions are directly linked.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Palubin KM,Goodwin BL,Niesen MI,Le EA,Osborne AR,Blanck G

subject

Has Abstract

pub_date

2006-05-01 00:00:00

pages

1733-8

issue

3A

eissn

0250-7005

issn

1791-7530

journal_volume

26

pub_type

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