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Related Concept Videos

Spermatogenesis01:41

Spermatogenesis

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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...
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Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
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Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...
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Meiosis I03:09

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Meiosis is the division of a diploid cell into haploid cells forming sperm and eggs in animals through differentiation. Meiosis I is the first stage of meiosis, where the genetic recombination of homologous chromosomes and the reduction of the ploidy level by half occurs.
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Meiosis II01:57

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Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each...
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Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
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PCP protein Prickle 1 regulates Sertoli cell and testis function via cytoskeletal organization through the recruitment of multiple regulatory proteins.

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Related Experiment Video

Updated: Mar 15, 2026

A Seminiferous Tubule Squash Technique for the Cytological Analysis of Spermatogenesis Using the Mouse Model
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Does cell polarity matter during spermatogenesis?

Ying Gao1, C Yan Cheng1

  • 1The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council , New York, NY, USA.

Spermatogenesis
|September 17, 2016
PubMed
Summary
This summary is machine-generated.

Cell polarity proteins, including Par, CRB, and Scribble modules, are vital for testis development and function. These proteins regulate Sertoli cell junctions and the blood-testis barrier, influencing spermatogenesis.

Keywords:
PCP proteinsSertoli cellscell polaritygerm cellsplanar cell polaritypolarity protein complexesseminiferous epithelial cycleseminiferous tubulespermatidstestis

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Area of Science:

  • Cell Biology
  • Developmental Biology
  • Reproductive Biology

Background:

  • Cell polarity, established by Par, CRB, and Scribble modules, is critical for embryogenesis.
  • The role of these polarity proteins in the testis was largely unexplored until 2008.
  • Recent research indicates their involvement in Sertoli cell polarity and the blood-testis barrier (BTB).

Purpose of the Study:

  • To evaluate current findings on polarity proteins in the testis.
  • To propose a hypothetical model for their function in spermatogenesis.
  • To guide future experimental design for studying these proteins' significance.

Main Methods:

  • Literature review and evaluation of existing studies on polarity proteins in the testis.
  • Comparative analysis with polarity protein functions in other epithelial systems.
  • Development of a hypothetical model based on current evidence.

Main Results:

  • Par, CRB, and Scribble complexes confer polarity to Sertoli cells and spermatids.
  • These proteins are integral to tight junctions (TJ) and ectoplasmic specializations (ES), forming the BTB.
  • Antagonistic effects observed: Par6/CRB3 complexes promote BTB integrity, while Scribble promotes TJ remodeling.

Conclusions:

  • Polarity proteins play a significant, complex role in regulating Sertoli cell adhesion and BTB function.
  • Their functions in the testis involve both maintaining TJ integrity and facilitating necessary remodeling.
  • Further research is needed to fully elucidate their precise roles in spermatogenesis.