Year: 2007
Type: article
Abstract: Meiotic recombination is initiated by a series of double-strand breaks (DSBs) in areas of the genome that generally contain promoters and feature an open chromatin configuration (Petes, 2001).To investigate whether induced DSBs likewise lead to recombinational repair and whether the placement of new exchange events alters normal patterns of recombination, we used the chemotherapeutic drug cisplatin (CP) to generate additional DSBs throughout the mouse genome.Treatment with CP impaired spermatogenesis, as exhibited by reductions in sperm counts, reductions in both testicular size and weight, changes in the distribution of cells at various prophase I substages, prolonged increases in germ cell apoptosis, and an increased incidence of synaptic abnormalities.Unexpectedly, however, no obvious effect on genome-wide recombination levels in CP-treated animals was observed, nor was the level of aneuploidy increased in sperm from exposed males.
Author: Sheila M. Cherry
Institution: Case Western Reserve University
Language: English
Topic: DNA Repair Mechanisms
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: green
Funder: National Institutes of Health
OpenAlex ID: W2531006585