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Related Concept Videos

Spermatogenesis01:41

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...
X-Inactivation01:58

X-Inactivation

The human X chromosome contains over ten times the number of genes as in the Y chromosome. Since males have only one X chromosome, and females have two, one might expect females to produce twice as many of the proteins, with undesirable results.

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Related Experiment Video

Updated: Jul 16, 2026

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
05:44

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

[CatSper and sperm hyperactivation].

Li-juan Kong1, Yuan-yuan Yang, Gen-lin Wang

  • 1Animal Science and Technology College, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China. klj1511203@163.com

Zhonghua Nan Ke Xue = National Journal of Andrology
|March 10, 2007
PubMed
Summary

Sperm hyperactivation, a key motility for fertilization, requires CatSper calcium channels. These channels control calcium entry into sperm flagella, enabling the asymmetric movement needed for reproduction.

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Last Updated: Jul 16, 2026

Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
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Published on: March 1, 2019

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Measuring Intracellular Ca2+ Changes in Human Sperm using Four Techniques: Conventional Fluorometry, Stopped Flow Fluorometry, Flow Cytometry and Single Cell Imaging
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Measuring Intracellular Ca2+ Changes in Human Sperm using Four Techniques: Conventional Fluorometry, Stopped Flow Fluorometry, Flow Cytometry and Single Cell Imaging

Published on: May 24, 2013

Area of Science:

  • Reproductive biology
  • Ion channel function
  • Sperm physiology

Context:

  • Sperm motility is crucial for fertilization.
  • Hyperactivation is an essential sperm function.
  • CatSper channels are vital for sperm function.

Purpose:

  • Describe the structure of mouse CatSper.
  • Elucidate the role of CatSper in sperm hyperactivation.
  • Identify unsolved problems in CatSper research.

Summary:

  • Sperm hyperactivation, a critical motility pattern for fertilization, is regulated by CatSper calcium channels.
  • CatSper channels, located in the sperm flagellum, facilitate calcium influx necessary for increased waveform asymmetry.
  • This study details the structure of mouse CatSper and its function in hyperactivation, highlighting areas for future research.

Impact:

  • Understanding CatSper's role can inform fertility treatments.
  • Insights into CatSper may lead to new male contraceptives.
  • This research contributes to the fundamental knowledge of sperm function and fertilization.