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Haploid like spermatid generation by transplantation of neonatal mouse testicular tissue into the epididymal fat of castrated adult mouse.
JBRA Assist Reprod
January 2025
Department of Anatomical Sciences, Faculty of Medicine, Tarbiat Modares University, Tehran, Iran.
Objective: Many cancer survivors may experience irreversible infertility due to chemotherapy treatment for childhood cancer. In this study, spermatogenesis development was evaluated following the grafting of fresh and frozen-thawed testicular tissue from neonatal mice to the epididymal fat of adult mice.
Methods: After bilateral castration of recipient mice, fresh or frozen-thawed neonatal testis tissues were grafted into the epididymal fat of the mice.
Isogenic fish sperm produced by transplanting gynogenetic haploid-derived germ cells.
Biol Reprod
January 2025
Faculty and Graduate School of Fisheries Sciences, Hokkaido University, Hokkaido, Japan.
Artificially induced haploidy is lethal in vertebrates, although it is useful for genetic screening and genome editing due to its single set of genomes. Haploid embryonic stem (ES) cell lines in mammals contribute to genetic studies and the production of gametes derived from haploid ES cells. In fish breeding, doubled haploids (DHs) induced by artificially induced gynogenesis are used to generate isogenic gametes for cloning purposes.
View Article and Find Full Text PDFTranscriptomic Response of the Ovarian Follicle Complex in Post-Vitellogenic Rainbow Trout to 17α,20β-Dihdroxy-4-pregnen-3-one In Vitro.
Int J Mol Sci
November 2024
US Department of Agriculture, Agricultural Research Service, National Center for Cool and Cold Water Aquaculture, 11861 Leetown Road, Kearneysville, WV 25430, USA.
Gonadotropins and progestins are the primary regulators of follicle maturation and ovulation in fish, and they require complex communication among the oocyte and somatic cells of the follicle. The major progestin and the maturation-inducing hormone in salmonids is 17α,20β-dihdroxy-4-pregnen-3-one (17,20βP), and traditional nuclear receptors and membrane steroid receptors for the progestin have been identified within the follicle. Herein, RNA-seq was used to conduct a comprehensive survey of changes in gene expression throughout the intact follicle in response to in vitro treatment with these hormones to provide a foundation for understanding the coordination of their actions in regulating follicle maturation and preparation for ovulation.
View Article and Find Full Text PDFTaFAR9 and TaFAR10 synergistically regulate fertility conversion of photo-thermo-sensitive genic male sterility lines in wheat by modulating ROS homeostasis.
Int J Biol Macromol
January 2025
College of Agronomy, Northwest A&F University, Yangling 712100, Shaanxi, China. Electronic address:
Photo-thermo-sensitive genic male sterility (PTGMS), which exhibits varying fertility levels under different environmental conditions, is a crucial method for heterosis utilization in wheat. However, the mechanisms underlying fertility conversion remain unclear. In the study, three BS type PTGMS lines were analyzed to study fertility conversion characteristics.
View Article and Find Full Text PDFTransition from sexuality to androgenesis through a meiotic modification during spermatogenesis in freshwater Corbicula clams.
PLoS One
November 2024
Laboratory of Evolutionary Genetics and Ecology, Research Unit in Environmental and Evolutionary Biology, Institute of Life, Earth, and Environment, University of Namur, Namur, Belgium.
Article Synopsis
- * The study focused on the transition to androgenesis in freshwater Corbicula clams, where males clone themselves using female resources, and examined how this process affects spermatogenesis in different clam species.
- * Results showed that C. japonica undergoes conventional meiosis, while C. sp. form A/R does not exhibit reduced sperm stages, indicating a modification in reproductive strategy; interestingly, C. sandai produced unreduced sperm, suggesting it may have a role in the emergence of androgenesis.
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