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Related Concept Videos

Fertilization01:38

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
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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...
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Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
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Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm
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Medium-throughput Screening Assays for Assessment of Effects on Ca2+-Signaling and Acrosome Reaction in Human Sperm

Published on: March 1, 2019

Cellular mechanisms regulating sperm-zona pellucida interaction.

Andrew T Reid1, Kate Redgrove, R John Aitken

  • 1Reproductive Science Group, Discipline of Biological Sciences, School of Environmental and Life Sciences, University of Newcastle, Callaghan, NSW 2308, Australia.

Asian Journal of Andrology
|November 3, 2010
PubMed
Summary
This summary is machine-generated.

Spermatozoa undergo significant maturation, including surface remodeling, to bind the egg's zona pellucida (ZP). This species-specific adhesion involves multiple receptor-ligand interactions, forming a multimeric zona recognition complex (MZRC).

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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
  • Cell Biology
  • Biochemistry

Background:

  • Spermatozoa require maturation in the testis, epididymis, and female reproductive tract for zona pellucida (ZP) binding.
  • Sperm surface remodeling is crucial for oocyte recognition and adhesion.
  • Species-specific sperm-zona pellucida adhesion is a complex process.

Purpose of the Study:

  • To explore the intricate mechanisms of sperm-zona pellucida (ZP) binding.
  • To investigate the role of multiple receptor-ligand interactions in sperm adhesion.
  • To understand the formation of multimeric zona recognition complexes (MZRCs).

Main Methods:

  • Review of existing literature on sperm maturation and ZP binding.
  • Analysis of current models for sperm-oocyte interaction.
  • Discussion of protein aggregation and complex formation in sperm function.

Main Results:

  • Spermatozoa maturation involves extensive surface remodeling critical for ZP binding.
  • Species-specific ZP adhesion is mediated by multiple receptor-ligand interactions, not a single receptor.
  • Dynamic protein aggregation leads to the formation of a multimeric zona recognition complex (MZRC).

Conclusions:

  • The formation of MZRCs explains the complex maturation process sperm undergo.
  • Multiple interactions are essential for successful sperm-zona pellucida binding.
  • Understanding MZRC formation provides insights into reproductive processes and potential fertility challenges.