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http://dx.doi.org/10.1007/978-3-540-48461-5_3 | DOI Listing |
Curr Top Dev Biol
January 2025
School of Molecular Biosciences, Washington State University, Pullman, Washington, United States. Electronic address:
For mammalian spermatogenesis to proceed normally, it is essential that the population of testicular progenitor cells, A undifferentiated spermatogonia (A), undergoes differentiation during the A to A1 transition that occurs at the onset of spermatogenesis. The commitment of the A population to differentiation and leaving a quiescent, stem-like state gives rise to all the spermatozoa produced across the lifespan of an individual, and ultimately determines male fertility. The action of all-trans retinoic acid (atRA) on the A population is the determining factor that induces this change.
View Article and Find Full Text PDFCurr Issues Mol Biol
December 2024
College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
Spermatogenesis is an advanced biological process, relying on intricate interactions between somatic and germ cells in testes. Investigating various cell types is challenging because of cellular heterogeneity. Single-cell RNA sequencing (scRNA-seq) offers a method to analyze cellular heterogeneity.
View Article and Find Full Text PDFCureus
December 2024
Medical Corps, Israel Defense Forces, Haifa, ISR.
Testicular tumors represent the most common solid organ malignancy in young and adult males. Sex cord-stromal tumors are the second-largest group of primary testicular cancers, after germ-cell tumors. Sertoli cell (SC) tumors of the testis are relatively rare, accounting for only a small fraction of testicular tumors.
View Article and Find Full Text PDFBiol Reprod
January 2025
Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, NC USA.
The adult mammalian testis is filled with seminiferous tubules, which contain somatic Sertoli cells along with germ cells undergoing all phases of spermatogenesis. During spermatogenesis in postnatal mice, male germ cells undergo at least 17 different nomenclature changes as they proceed through mitosis as spermatogonia (=8), meiosis as spermatocytes (=6), and spermiogenesis as spermatids (=3) [1-6]. Adding to this complexity, combinations of germ cells at each of these stages of development are clumped together along the length of the seminiferous tubules.
View Article and Find Full Text PDFSemin Immunopathol
January 2025
Institute of Anatomy and Cell Biology, Hessian Centre of Reproductive Medicine, Justus-Liebig University Giessen, Aulweg 123, 35392, Giessen, Germany.
The formation and differentiation of mature, motile male germ cells, which can fertilize the egg and ensure successful implantation and development of a healthy embryo, are essential functions of the testis and epididymis. Spermatogenesis is a complex, multistep process that results in the formation of motile haploid gametes, requiring an immunoregulatory environment to maintain tolerance to developing neo-antigens. Different cell types (Sertoli cells, macrophages), immunoregulatory factors and tolerance mechanisms are involved.
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