Results 71 to 80 of about 20,184 (239)
Behavioral mechanisms of mammalian sperm guidance
Asian Journal of Andrology, 2015 In mammals, sperm guidance in the oviduct appears essential for successful sperm arrival at the oocyte. Hitherto, three different potential sperm guidance mechanisms have been recognized: thermotaxis, rheotaxis, and chemotaxis, each of them using ...
Serafín Pérez Cerezales +2 more
doaj +1 more source
Scientific Reports, 2021 The human orthologue of the tumor suppressor protein FBW7 is encoded by the Drosophila archipelago (ago) gene. Ago is an F-box protein that gives substrate specificity to its SCF ubiquitin ligase complex.
Viktor Vedelek +4 more
doaj +1 more source
Andrology, EarlyView.Abstract Background It is well‐established that spermatogenesis, semen quality, and reproductive hormones are interlinked. It is, however, less well‐described how various specific testicular histopathologies are linked to reproductive hormones and semen quality.
Gülizar Saritas +6 more
wiley +1 more source
Intersex related gene expression profiles in clams Scrobicularia plana : molecular markers and environmental application [PDF]
, 2015 Intersex, the appearance of female characteristics in male gonads, has been identified in several aquatic species. It is a widespread phenomenon in populations of the bivalve, Scrobicularia plana, from the southwest coast of the U.K.
Alvarez-Munoz, Diana +14 more
core +1 more source
Asian Journal of Andrology, 2015 One of the most common lesions present in the spermatozoa of human infertility patients is an idiopathic failure of sperm-egg recognition. Although this unique cellular interaction can now be readily by-passed by assisted reproductive strategies such as ...
Brett Nixon +5 more
doaj +1 more source
Frontiers in Cell and Developmental Biology, 2020 GRTH/DDX25 is a testicular RNA helicase expressed in germ cells that plays a crucial role in completion of spermatogenesis. Previously, we demonstrated a missense mutation (R242H) of GRTH gene in Japanese infertile patients (5.8%) with non-obstructive ...
Raghuveer Kavarthapu +4 more
doaj +1 more source
Genetically haploid spermatids are phenotypically diploid [PDF]
Nature, 1989 Because chromosomal homologues segregate from one another during meiosis, spermatids are genetically different. Post-meiotic gene expression could lead to gametic differences, some of which might lead to preferential transmission of certain alleles over others.
Brinster, Ralph L. +4 more
openaire +2 more sources
The use of deidentified organ donor testes for research
Andrology, EarlyView.Abstract Our knowledge of testis development and function mainly comes from research using mammalian model organisms, primarily the mouse. However, there are integral differences between men and other mammalian species regarding cellular composition and expression profiles during fetal and post‐natal testis development and in the mature testis ...
Marina V. Pryzhkova +4 more
wiley +1 more source
A comparative evaluation of semen parameters in pre- and post-Hurricane Katrina human population
Asian Journal of Andrology, 2015 A natural disaster leading to accumulation of environmental contaminants may have substantial effects on the male reproductive system. Our aim was to compare and assess semen parameters in a normospermic population residing in the Southern Louisiana, USA
Caner Baran +2 more
doaj +1 more source
Reproductive Medicine and Biology, 2023 Background First successful human round spermatid injection (ROSI) was conducted by Tesarik et al. in 1996 for the sole treatment of nonobstructive azoospermic men whose most advanced spermatogenic cells were elongating round spermatids.
Atsushi Tanaka, Seiji Watanabe
doaj +1 more source