Treatment and survival of reproductive-age patients with chemotherapy raises the question of possible effects on procreative ability. An attempt has been made to establish an animal model system. The anticancer agents nitrogen mustard and procarbazine caused decreased fertility in mice of both sexes and induced meiotic chromosomal abnormalities, at least in the male. Progeny of treated mice showed similar meiotic chromosomal changes. The possibility of similar effects in human beings receiving chemotherapy must be considered.
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http://dx.doi.org/10.1016/s0015-0282(16)46765-8 | DOI Listing |
Life Med
December 2024
Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226001, China.
Proper chromosome alignment at the spindle equator is a prerequisite for accurate chromosome segregation during cell division. However, the chromosome movement trajectories prior to alignment remain elusive. Here, we established a 4D imaging analysis framework to visualize chromosome dynamics and develop a deep-learning model for chromosome movement trajectory classification.
View Article and Find Full Text PDFNon-crossover gene conversion is a type of meiotic recombination characterized by the non-reciprocal transfer of genetic material between homologous chromosomes. Gene conversions are thought to occur within relatively short tracts of DNA, estimated to be in the order of 100-1,000 bp in humans. However, the number of observable gene conversion tracts per study has so far been limited by the use of pedigree or sperm-typing data to detect gene conversion events.
View Article and Find Full Text PDFAnimals (Basel)
January 2025
Key Laboratory of Applied Biology and Aquaculture of Fish in Northern Liaoning Province, PRC, Dalian Ocean University, Dalian 116023, China.
As an important aquaculture fish, the genus Carassius exhibits different ploidy, including tetraploids and hexaploids [...
View Article and Find Full Text PDFScience
January 2025
Sex Chromosome Biology Laboratory, The Francis Crick Institute, London, UK.
The mammalian Y chromosome is essential for male fertility, but which Y genes regulate spermatogenesis is unresolved. We addressed this by generating 13 Y-deletant mouse models. In , , and deletants, spermatogenesis was impaired.
View Article and Find Full Text PDFReprod Med Biol
January 2025
Laboratory of Animal Reproduction, Graduate School of Agricultural Sciences Yamagata University Tsuruoka Japan.
Purpose: This study aimed to investigate the molecular mechanisms associated with chromosome segregation errors caused by intrinsic oxidative stress during in vitro oocyte maturation (IVM) using oocytes from -deficient (KO) mice.
Methods: Ovulated or in vitro matured cumulus-cells oocyte complexes (COCs) were collected from wild-type (WT) and KO mice and evaluated chromosome alignment, chromosome segregation, meiotic progression, and BUBR1 and REC8 protein expression levels.
Results: In 21% O IVM, the KO had significantly higher frequencies of chromosome misalignment and segregation errors compared to the WT, and they also reached Germinal Vesicle Break Down (GVBD) and M I stages peak earlier and showed a shorter M I stage residence time compared to the WT.
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