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Updated: Jul 13, 2026
08:22
Using an Extracellular Flux Analyzer to Measure Changes in Glycolysis and Oxidative Phosphorylation during Mouse Sperm Capacitation
Published on: January 22, 2020
In spermatozoa, Stat1 is activated during capacitation and the acrosomal reaction
Yadira Bastián1, Armando Zepeda-Bastida, Salvador Uribe
1Departamento de Biología Celular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, México DF, Mexico.
Reproduction (Cambridge, England)
|August 22, 2007
Summary
Signal transducer and activator of transcription 1 (Stat1) undergoes crucial changes during sperm capacitation and acrosomal reaction. These events suggest Stat1
Area of Science:
- Reproductive biology
- Molecular and cellular biology
- Sperm biology
Background:
- Sperm-specific proteins are implicated in early embryonic development.
- The role of transcription factors in sperm during early development remains largely unknown.
Purpose of the Study:
- To investigate the role and behavior of transcription factors, specifically Stat1, during sperm capacitation and acrosomal reaction.
- To elucidate the spatio-temporal dynamics of Stat1 in sperm.
Main Methods:
- Analysis of Stat1 phosphorylation in response to capacitation and acrosomal reaction.
- Tracking Stat1 localization changes during these processes.
- Investigating the involvement of protein kinase A (PKA) and protein kinase C (PKC) signaling pathways.
Main Results:
- Stat1, but not Stat4, was phosphorylated during capacitation and acrosomal reaction.
- Stat1 translocated from the cytoplasm to the theca/flagellum fraction during capacitation.
- Stat1 phosphorylation increased further during the acrosomal reaction.
- Inhibition of PKA and PKC blocked Stat1 phosphorylation and migration.
Conclusions:
- Sperm Stat1 undergoes significant spatio-temporal rearrangements during capacitation and acrosomal reaction.
- These modifications suggest a role for Stat1 in the initial transcriptional events within the male pronucleus post-fertilization.
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