Results 21 to 30 of about 31,775 (244)

Cell proliferation and differentiation kinetics during spermatogenesis in Hydra carnea [PDF]

open access: yes, 1985
Spermatogenesis inHydra carnea was investigated. The cell proliferation and differentiation kinetics of intermediates in the spermatogenesis pathway were determined, using quantitative determinations of cell abundance, pulse and continuous labelling ...
A Brauer   +17 more
core   +1 more source

Nejire/dCBP-mediated control of H3 acetylation and transcriptional regulation by testis-specific Plus3 domain proteins during Drosophila spermatogenesis [PDF]

open access: yes, 2018
Spermatogenesis describes the development from germ line stem cells to highly specialized sperm. Drosophila melanogaster spermatogenesis is a good model system for chromatin remodelling processes as many of these processes are similar in mammals and in ...
Hundertmark, Tim
core   +1 more source

Comparative analyses of CTCF and BORIS occupancies uncover two distinct classes of CTCF binding genomic regions. [PDF]

open access: yes, 2015
BackgroundCTCF and BORIS (CTCFL), two paralogous mammalian proteins sharing nearly identical DNA binding domains, are thought to function in a mutually exclusive manner in DNA binding and transcriptional regulation.ResultsHere we show that these two ...
Boukaba, Abdelhalim   +15 more
core   +3 more sources

Influence of rainfall and temperature on the spermatogenesis of Leptodactylus macrosternum (Anura: Leptodactylidae)

open access: yesZoologia (Curitiba), 2017
In the semi-arid environment, the reproductive success of anurans depends on adaptations in their life cycle, which synchronizes with ideal environmental conditions to maximize the number of offspring.
Marcio F. Chaves   +6 more
doaj   +1 more source

Contribution of recent transgenic models and transcriptional profiling studies to our understanding of the mechanisms by which androgens control spermatogenesis [PDF]

open access: yes, 2008
Publisher ...
Claessens, Frank   +7 more
core   +1 more source

“Breaking news” from spermatids [PDF]

open access: yesBasic and Clinical Andrology, 2013
Abstract During the haploid phase of spermatogenesis, spermatids undergo a complex remodeling of the paternal genome involving the finely orchestrated replacement of histones by the highly-basic protamines. The associated striking change in DNA topology is characterized by a transient surge of both single- and double-stranded DNA breaks in ...
Gouraud, Anne   +6 more
openaire   +2 more sources

Evidence for a GABAergic system in rodent and human testis: Local GABA production and GABA receptors [PDF]

open access: yes, 2003
The major neurotransmitter of the central nervous system, gamma-aminobutyric acid (GABA), exerts its actions through GABA(A), GABA(B) and GABA(C) receptors.
Calandra, Ricardo S.   +7 more
core   +2 more sources

A potential role for the clathrin adaptor GGA in Drosophila spermatogenesis

open access: yesBMC Cell Biology, 2011
Background GGAs (Golgi-localised, γ-ear containing, ADP ribosylation factor-binding) are a family of clathrin adaptors that sort a number of biologically important transmembrane proteins into clathrin-coated vesicles.
Carmichael Jenny, Hirst Jennifer
doaj   +1 more source

Action of the Metalloproteinases in Gonadal Remodeling during Sex Reversal in the Sequential Hermaphroditism of the Teleostei Fish Synbranchus marmoratus (Synbranchiformes: Synbranchidae) [PDF]

open access: yes, 2018
Teleostei present great plasticity regarding sex change. During sex reversal, the whole gonadincluding the germinal epithelium undergoes significant changes, remodeling, and neoformation.However, there is no information on the changes that occur within ...
Antoneli, Fernanda   +3 more
core   +2 more sources

Are spermatid injections of any clinical value? ROSNI and ROSI revisited. Round spermatid nucleus injection and round spermatid injection [PDF]

open access: yesHuman Reproduction, 1998
Tiny numbers of spermatozoa can be extracted from an extensive testis biopsy and be used successfully for intracytoplasmic sperm injection (ICSI) in ∼60% of cases of non-obstructive azoospermia caused by testicular failure (e.g. maturation arrest, Sertoli cell only, cryptorchid atrophy, post-chemotherapy, or even Klinefelter's syndrome).
S J, Silber, L, Johnson
openaire   +2 more sources

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