Results 11 to 20 of about 25,438 (286)

BRCA1 preserves genome integrity during the formation of undifferentiated spermatogonia [PDF]

open access: goldEMBO Reports
Undifferentiated spermatogonia, which form shortly after birth, consist of spermatogonial stem cells and progenitor spermatogonia that maintain homeostasis.
Peng Li, Yidan Liu, Lin-Yu Lu
exaly   +4 more sources

Doxorubicin and 4-Hydroperoxycyclophosphamide Alter Mitochondrial Dynamics and miR-34 Expression in Spermatogonia and Spermatocytes In Vitro. [PDF]

open access: hybridBasic Clin Pharmacol Toxicol
ABSTRACT Doxorubicin (DOX) and cyclophosphamide (CP) are widely used chemotherapeutic agents with known gonadotoxic effects. Since miRNAs play a key role in the transcriptional regulation of spermatogenesis, they are suggested as biomarkers for male infertility.
Öztatlıcı H   +4 more
europepmc   +4 more sources

One‐Step Induction of Oogonia‐Like and Pro‐Spermatogonia‐Like Cells From Porcine Pluripotent Stem Cells

open access: goldAdvanced Science, EarlyView.
This study established a one‐step method inducing pro‐spermatogonia‐like (activating SOX17) and oogonia‐like (activating SOX17/TFAP2C) cells from porcine pgEpiSCs with a NANOS3‐tdTomato reporter. EGF activates the core PGC program and supports survival; BMP4 further induces NANOS3 and DDX4 expression; IWR1 enhances PGCLC efficiency by suppressing ...
Pengcheng He   +14 more
openalex   +2 more sources

Feedback Regulation of the Proliferation of the Undifferentiated Spermatogonia In the Chinese Hamster By the Differentiating Spermatogonia

open access: yesCell Proliferation, 1985
AbstractIn the seminiferous epithelium the differentiating spermatogonia proliferate following a very strict synchronous pattern, and undergo the S phase during parts of particular epithelial stages. the undifferentiated spermatogonia do not divide synchronously and display maximum proliferative activity in stages XI‐III.
de rooij, D. G., Lok, D., Weenk, D.
openaire   +4 more sources

Micro RNA in Semen/Urine from Non-Obstructive Azoospermia Patients as Biomarkers to Predict the Presence of Testicular Spermatozoa and Spermatogonia

open access: yesLife, 2023
About half of testicular sperm extraction (TESE) procedures in men with non-obstructive azoospermia (NOA), including men with Klinefelter syndrome (KS), are unsuccessful. To avoid unnecessary invasive surgery, biomarkers for spermatozoa were studied.
Margo Willems   +2 more
exaly   +3 more sources

BMI1 fine-tunes gene repression and activation to safeguard undifferentiated spermatogonia fate [PDF]

open access: yesFrontiers in Cell and Developmental Biology, 2023
Introduction: Spermatogenesis is sustained by the homeostasis of self-renewal and differentiation of undifferentiated spermatogonia throughout life, which is regulated by transcriptional and posttranscriptional mechanisms.
Ruiqi Liu   +10 more
doaj   +2 more sources

Targeted Gene Editing in Porcine Spermatogonia [PDF]

open access: yesFrontiers in Genetics, 2021
To study the pathophysiology of human diseases, develop innovative treatments, and refine approaches for regenerative medicine require appropriate preclinical models.
Dennis Webster   +7 more
doaj   +3 more sources

Set7-Mediated Repression of the HIF-1α Adaptive Response Triggers Apoptosis in Hypoxic Spermatogonia [PDF]

open access: goldFrontiers in Bioscience-Landmark
Background:Male infertility, often caused by oligospermia, is a major global health concern. Hypoxia is a known inducer of germ cell death, a process governed by the hypoxia-inducible factor 1α (HIF-1α).
Yangyang Song   +3 more
doaj   +2 more sources

Super-Multiplexed Label-Free Raman Imaging Uncovers Novel Testicular Metabolic Couplings for Residual Body and Spermatogonial Differentiation. [PDF]

open access: yesAdv Sci (Weinh)
Super‐multiplexed Label‐free Raman Imaging (SLRI) enables 2D/3D metabolic mapping of intact Drosophila testes. Moving beyond descriptive morphology, it establishes a multidimensional tool for tissue metabolic remodeling, and offers a generalizable platform for complex tissue analysis, with implications extending to development and disease. ABSTRACT The
Li J   +23 more
europepmc   +2 more sources

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