Results 41 to 50 of about 38,921 (268)

Retinoic Acid Is Sufficient for the In Vitro Induction of Mouse Spermatocytes

open access: yesStem Cell Reports, 2016
Meiosis is the key step in gametogenesis. However, the mechanism of mammalian meiosis remains poorly understood due to the lack of an in vitro model. Here, we report that retinoic acid (RA) is sufficient for inducing leptotene/zygotene spermatocytes from
Si Wang   +14 more
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

Transcriptional Inhibition of lncRNA gadd7 by CRISPR/dCas9-KRAB Protects Spermatocyte Viability

open access: yesFrontiers in Molecular Biosciences, 2021
Our previous study found that lncRNA gadd7 was up-regulated in the semen of varicocele patients, and could promote the apoptosis of mouse spermatocytes and inhibit their proliferation.
Jun Zhao   +7 more
doaj   +1 more source

A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: A cytogenetic and morphological study [PDF]

open access: yes, 2016
Poco se sabe sobre la biología reproductiva de Steindachneridion parahybae , una especie de teleósteo gonocorístico en peligro de extinción que habita la cuenca del río Paraíba do Sul y en éste trabajo se describe por primera vez la aparición de ...
Caneppele, Danilo   +4 more
core   +2 more sources

HIM-10 is required for kinetochore structure and function on Caenorhabditis elegans holocentric chromosomes. [PDF]

open access: yes, 2001
Macromolecular structures called kinetochores attach and move chromosomes within the spindle during chromosome segregation. Using electron microscopy, we identified a structure on the holocentric mitotic and meiotic chromosomes of Caenorhabditis elegans ...
Albertson   +33 more
core   +2 more sources

The Drosophila Citrate Lyase Is Required for Cell Division during Spermatogenesis [PDF]

open access: yes, 2020
The Drosophila melanogaster DmATPCL gene encodes for the human ATP Citrate Lyase (ACL) ortholog, a metabolic enzyme that from citrate generates glucose-derived Acetyl-CoA, which fuels central biochemical reactions such as the synthesis of fatty acids ...
Bucciarelli, Elisabetta   +8 more
core   +1 more source

Spermatogenesis disorders in sterlet (Acipenser ruthenus Linnaeus, 1758) in water area of the Kakhovka Reservoir

open access: yesRibogospodarsʹka Nauka Ukraïni
Purpose. To conduct histological studies of sterlet spermatogenesis in technogenic conditions. To determine the level of reproductive system disorders, to identify possible causes of abnormalities.
М. Koziy
doaj   +1 more source

Stress Resilience of Spermatozoa and Blood Mononuclear Cells without Prion Protein

open access: yesFrontiers in Molecular Biosciences, 2018
The cellular prion protein PrPC is highly expressed in neurons, but also present in non-neuronal tissues, including the testicles and spermatozoa. Most immune cells and their bone marrow precursors also express PrPC.
Malin R. Reiten   +17 more
doaj   +1 more source

The role of tyrosine phosphatase Shp2 in spermatogonial differentiation and spermatocyte meiosis

open access: yesAsian Journal of Andrology, 2020
The transition from spermatogonia to spermatocytes and the initiation of meiosis are key steps in spermatogenesis and are precisely regulated by a plethora of proteins. However, the underlying molecular mechanism remains largely unknown.
Yang Li   +11 more
doaj   +1 more source

Dynamic sex chromosome expression in Drosophila male germ cells

open access: yesNature Communications, 2021
Sex chromosome gene content and expression is unusual. Here the authors use single cell RNA-Seq on Drosophila larvae to demonstrate that the single X and pair of 4th chromosomes are specifically inactivated in primary spermatocytes, while genes on the ...
Sharvani Mahadevaraju   +22 more
doaj   +1 more source

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