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2001 ; 92
(4
): 417-22
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Down-regulation in multiple human cancers of a novel gene, DMHC, from 17q25 1
that encodes an integral membrane protein
#MMPMID11346464
Mikami I
; Harada H
; Nagai H
; Tsuneizumi M
; Nobe Y
; Koizumi K
; Sugano S
; Tanaka S
; Emi M
Jpn J Cancer Res
2001[Apr]; 92
(4
): 417-22
PMID11346464
show ga
Frequent observations of allelic loss in chromosomal band 17q25.1 in a variety of
human cancers have suggested that one or more tumor suppressor genes are present
in that region. Moreover, a genetic locus for hereditary focal non-epidermolytic
palmoplantar keratoderma, a condition associated with cancer of the esophagus
(TOC; Tylosis with Oesophageal Cancer), lies in the same region. We screened cell
lines derived from a variety of human cancers by reverse transcription-polymerase
chain reaction (RT-PCR) to detect alterations in expression of genes within the
region in question, by examining expressed sequence tags located there. These
experiments identified an 1834-bp full-length cDNA encoding a novel, 441-amino
acid integral membrane protein with seven putative transmembrane domains. This
gene showed loss or extreme decrease of expression in 6 of 10 uterine cancer-cell
lines, 2 of 11 hepatic cell carcinoma-cell lines, 2 of 7 lung cancer-cell lines,
1 of 6 gastric cancer-cell lines, and 1 of 10 breast cancer-cell lines. (We named
it DMHC ("down-regulated in multiple human cancers").) Our results suggest that
loss of expression of DMHC at 17q25.1 may play an important role in development
of variety of human cancers.