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Genes regulating testis size.

C Chubb1

  • 1Department of Cell Biology and Neuroscience, University of Texas Southwestern Medical Center, Dallas 75235-9039.

Biology of Reproduction
|July 1, 1992
PubMed
Summary
This summary is machine-generated.

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Genetic and morphological factors influence mouse testis size. At least two autosomal genes regulate Sertoli cell numbers, impacting testis size in C57BL mouse substrains.

Area of Science:

  • Genetics
  • Developmental Biology
  • Comparative Genomics

Background:

  • Significant testis size variations exist among closely related C57BL mouse substrains (C57BL/6J, C57BL/6ByJ, C57BL/10J).
  • C57BL/6J mice exhibit normal testis size, whereas C57BL/6ByJ and C57BL/10J substrains display smaller testes.

Purpose of the Study:

  • To investigate the genetic and morphological underpinnings of testis size differences in C57BL mouse substrains.
  • To identify genes and cellular mechanisms responsible for regulating testis size.

Main Methods:

  • Utilized recombinant inbred mouse strains to examine the number of genes controlling testis size.
  • Performed molecular analyses with a Y chromosome-specific probe to investigate the role of Y chromosome genes.
  • Conducted Sertoli and germ cell counts to understand the morphological basis of testis size variation.

Related Experiment Videos

Main Results:

  • Postulated that genes controlling testis size are among the approximately forty genes differentiating C57BL/6J and C57BL/6ByJ substrains.
  • Identified at least two autosomal genes involved in testis size regulation.
  • Demonstrated that these autosomal genes influence testis size by modulating Sertoli cell numbers.

Conclusions:

  • Testis size variation in C57BL mouse substrains is influenced by specific autosomal genes.
  • Sertoli cell proliferation is a key morphological factor regulated by these genes, ultimately determining testis size.