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Loss of heterozygosity of the retinoblastoma and adenomatous polyposis susceptibility gene loci and in chromosomes 10p, 10q and 16q in human prostate cancer
Author(s) -
PHILLIPS S. M. A.,
MORTON D. G.,
LEE S. J.,
WALLACE D. M. A.,
NEOPTOLEMOSH J. P.
Publication year - 1994
Publication title -
british journal of urology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.773
H-Index - 148
eISSN - 1464-410X
pISSN - 0007-1331
DOI - 10.1111/j.1464-410x.1994.tb07602.x
Subject(s) - loss of heterozygosity , retinoblastoma , locus (genetics) , biology , tumor suppressor gene , gene , cancer research , chromosome , adenomatous polyposis coli , suppressor , prostate , familial adenomatous polyposis , colorectal cancer , pathology , genetics , cancer , carcinogenesis , medicine , allele
Objective To examine prostate tumours for losses of known or suspected tumour suppressor genes to determine some of the important events in the genesis of this common cancer. Materials and methods Paired tumour and blood samples were obtained from 21 patients who underwent transurethral resection of malignant prostate glands for urinary outflow obstruction. Paired tumour and normal tissue (leucocytes) DNA was extracted and examined for possible losses of several known or suspected tumour suppressor genes, using restriction fragment length polymorphism techniques to detect loss of heterozygosity. Results Deletions of the retinoblastoma susceptibility gene (RB1) locus were found in six of nine informative cases using two intragenic probes (p68RS2.0 and p123m1.8). The locus related to the familial adenomatous polyposis susceptibility (APC) gene demonstrated loss of heterozygosity in three of seven informative cases using the EF5.44 probe. Losses were also noted in loci on chromosome 10p in four of 19 informative cases (probe cTBQ7), chromosome 10q in eight out of 19 informative cases (probes EFD75 and D10S90) and in 16q in three of 17 informative cases (probe D16S7). Conclusion These finding suggest that losses of the RE31 and APC tumour suppressor genes and suspected tumour suppressor genes on lop, 1Oq and 16q may be important events in the genesis of prostatic tumours.