Results 31 to 40 of about 370,507 (192)

Sperm tail axoneme alterations in the Wobbler mouse [PDF]

Reproduction, 1980
Summary. In Wobbler mice (neurological mutants affected with progressive motor neurone degenerative disease) a defect in sperm tail mobility and axonemal geometry was observed. Similar but less extensive abnormalities were seen in the ciliary axonemes of the ductuli efferentes.
Leestma, J E, Sepsenwol, S
openaire   +2 more sources

Not just heads and tails: The complexity of the sperm epigenome [PDF]

Journal of Biological Chemistry, 2018
Transgenerational inheritance requires mechanisms by which epigenetic information is transferred via gametes. Canonical thought holds that mammalian sperm chromatin would be incapable of carrying epigenetic information as post-translational modifications of histones because of their replacement with protamine proteins.
Hannah B, Gold, Yoon Hee, Jung, Victor G, Corces   +2 more
openaire   +2 more sources

Post-Meiotic Intra-Testicular Sperm Senescence in a Wild Vertebrate [PDF]

, 2012
There is growing interest in sperm senescence, both in its underlying mechanisms and evolutionary consequences, because it can impact the evolution of numerous life history traits. Previous studies have documented various types of sperm senescence, but
Richard H. Wagner, Penn, Dustin J., Richard H Wagner, Hoi Herbert, Wagner, Richard H., Hettyey Attila, Hoi, Herbert, Attila Hettyey, Dustin J. Penn, Balázs Vági, Herbert Hoi, Vági Balázs, Wagner Richard H., Penn Dustin J., Hettyey, Attila, Vági, Balázs, Dustin J Penn   +16 more
core   +2 more sources

TULP2 deletion mice exhibit abnormal outer dense fiber structure and male infertility

Reproductive Medicine and Biology, 2022
Purpose Tulp2 (tubby‐like protein 2) is a member of the tubby protein family and expressed predominantly in mouse testis. Recently, it was reported that Tulp2 knockout (KO) mice exhibited disrupted sperm tail morphology; however, it remains to be ...
Yuki Oyama, Haruhiko Miyata, Keisuke Shimada, Tamara Larasati, Yoshitaka Fujihara, Masahito Ikawa   +5 more
doaj   +1 more source

A STUDY ON SPERM TAIL ELEMENTS IN MOUSE BLASTOCYSTS [PDF]

Reproduction, 1971
Numerous studies have been published on the ultrastructural aspects of mammalian fertilization (Szollosi & Ris, 1961; Hadek, 1963, 1969; Austin, 1968; Barros & Franklin, 1968), and several recent articles have described changes in the head of the mammalian spermatozoon following its incorporation into the egg (Szollosi, 1965, 1969; Bedford ...
H D, McReynolds, R, Hadek
openaire   +2 more sources

Cryptic male choice: sperm allocation strategies when female quality varies [PDF]

, 2002
Reinhold K, Kurtz J, Engqvist L. Cryptic male choice: sperm allocation strategies when female quality varies. Journal of Evolutionary Biology. 2002;15(2):201-209.We examined evolutionary stable sperm allocation and included stochastic variation in male ...
Reinhold, Klaus, Engqvist, Leif ; https://orcid.org/, Kurtz, Joachim   +2 more
core   +1 more source

Computational Modelling of Sperm Behaviour in a 3D Virtual Oviduct [PDF]

, 2011
The processes by which individual sperm cells navigate the length and complexity of the female reproductive tract and then reach and fertilise the oocyte are fascinating. Numerous complex processes potentially influence the movement of spermatozoa within
Burkitt, Mark
core   +6 more sources

Rheotaxis facilitates upstream navigation of mammalian sperm cells [PDF]

, 2014
A major puzzle in biology is how mammalian sperm maintain the correct swimming direction during various phases of the sexual reproduction process. Whilst chemotaxis may dominate near the ovum, it is unclear which cues guide spermatozoa on their long ...
Dunkel, Jörn, Raymond E Goldstein, Jörn Dunkel, Goldstein, Raymond E., Martyn Blayney, Kantsler, Vasily, Dunkel, Joern, Blayney, Martyn, Vasily Kantsler   +8 more
core   +1 more source

Plasma membrane Ca2+ ATPase 4 is required for sperm motility and male fertility [PDF]

, 2004
Calcium and Ca(2+)-dependent signals play a crucial role in sperm motility and mammalian fertilization, but the molecules and mechanisms underlying these Ca(2+)-dependent pathways are incompletely understood. Here we show that homozygous male mice with a
Knobeloch, Klaus-Peter, Cartwright, Elizabeth J., Emerson, Michael, Oceandy, Delvac, Liebermann, Jürgen, Williams, Judith C., Armesilla, Angel, Cartwright, Elizabeth J.; id_orcid, Oceandy, Delvac; id_orcid, Bundschu, Karin, Jankevics, Eriks, Neyses, Ludwig, Schuh, Kai, Armesilla, Angel L., Knobeloch, Klaus Peter   +14 more
core   +2 more sources

Epididymal Sperm Characteristics of Iranian Short-Haired Cats [PDF]

Veterinary and Comparative Biomedical Research
The aim of this study was to assess epididymal sperm parameters in Iranian short-haired cats. The study examined the epididymal sperm quality in seven Iranian short-haired cats (aged 1–4 years) undergoing routine orchiectomy at the Veterinary Hospital of
Ahmad Reza Borzouei, Sajjad Nekoei Shahraki, Farid Barati   +2 more
doaj   +1 more source