Putative non-Mendelian transmission of retinoblastoma in males: a phenotypic segregation analysis of 150 pedigrees

Details

Serval ID
serval:BIB_3AC46D42E566
Type
Article: article from journal or magazin.
Publication sub-type
Review (review): journal as complete as possible of one specific subject, written based on exhaustive analyses from published work.
Collection
Publications
Institution
Title
Putative non-Mendelian transmission of retinoblastoma in males: a phenotypic segregation analysis of 150 pedigrees
Journal
Human Genetics
Author(s)
Munier  F. L., Arabien  L., Flodman  P., Spence  M. A., Pescia  G., Rutz  H. P., Murphree  A. L.
ISSN
0340-6717 (Print)
Publication state
Published
Issued date
11/1994
Volume
94
Number
5
Pages
484-90
Notes
Journal Article
Research Support, Non-U.S. Gov't
Review --- Old month value: Nov
Abstract
In a previous genotypic study of eight families, we described paternal segregation distortion favoring the transmission of mutant alleles at the retinoblastoma gene locus (RB1). In the current study, we reviewed all published retinoblastoma pedigrees with defined ascertainment (n = 150), to determine whether the phenotypic segregation frequency at the RB1 locus is in general influenced by the sex of the transmitting parent. Segregation analysis under complete ascertainment revealed that 49.1% of the offspring of male transmitters were affected, while 44.3% of the offspring of female transmitters were affected. While this difference is not statistically significant, it is consistent with the previous findings. No significant sex distortion could be detected among the progeny of carrier fathers and mothers. In order to quantify the transmission ratio more precisely further prospective molecular genetic analysis is warranted. We propose a biological mechanism to account for a putative segregation distortion, namely that genetic recombination creates clones of spermatogonia that are homozygous for the mutant RB1 allele leading to a non-Mendelian ratio of sperm. This model can be experimentally tested using amplification of DNA from single sperm cells.
Keywords
Female Genes, Retinoblastoma/*genetics Heterozygote Humans Likelihood Functions Linkage (Genetics) Male Pedigree Phenotype Retinoblastoma/*genetics Retrospective Studies Sex Factors Sex Ratio
Pubmed
Web of science
Create date
28/01/2008 12:54
Last modification date
20/08/2019 13:30
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