Comparative assessment of the timing of sexual maturation in male Wistar Han and Sprague-Dawley rats

Sarah N. Campion, Francisco R Carvallo chaigneau, Robert E. Chapin, William S. Nowland, David Beauchamp, Raul Jamon, Rebecca Koitz, Timothy R. Winton, Gregg D. Cappon, Mark E. Hurtt

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Given the increasing use of Wistar Han (WH) rats in regulatory toxicology studies, these studies were performed to characterize the onset of sexual maturation in maturing WH rats as compared to Sprague-Dawley (SD) rats. Beginning on postnatal day (PND) 38 through PND 91 groups (n=8) of untreated WH rats were evaluated for maturation of the male reproductive system. Testicular spermatid head counts increased beginning on PND 42 until PND 70. Sperm were detected in the caput, corpus, and cauda epididymis on PND 45, 49, and 49, respectively, and counts increased through PND 91. Sperm motility was at adult levels by PND 63. The morphology of the testis/epididymis of all animals at day 70 or older was consistent with qualitative sexual maturity. Based on these endpoints, WH rats were determined to be sexually mature at PND 70, and many of these endpoints evaluated in SD rats exhibited nearly identical trends.

Original languageEnglish (US)
Pages (from-to)16-24
Number of pages9
JournalReproductive Toxicology
Volume38
DOIs
StatePublished - Jul 2013
Externally publishedYes

Fingerprint

Sexual Maturation
Sprague Dawley Rats
Wistar Rats
Rats
Epididymis
Spermatids
Sperm Motility
Toxicology
Spermatozoa
Testis
Animals

Keywords

  • Epididymis
  • Male reproductive system
  • Sexual maturation
  • Sperm
  • Sprague-Dawley
  • Testis
  • Wistar Han

ASJC Scopus subject areas

  • Toxicology

Cite this

Comparative assessment of the timing of sexual maturation in male Wistar Han and Sprague-Dawley rats. / Campion, Sarah N.; Carvallo chaigneau, Francisco R; Chapin, Robert E.; Nowland, William S.; Beauchamp, David; Jamon, Raul; Koitz, Rebecca; Winton, Timothy R.; Cappon, Gregg D.; Hurtt, Mark E.

In: Reproductive Toxicology, Vol. 38, 07.2013, p. 16-24.

Research output: Contribution to journalArticle

Campion, SN, Carvallo chaigneau, FR, Chapin, RE, Nowland, WS, Beauchamp, D, Jamon, R, Koitz, R, Winton, TR, Cappon, GD & Hurtt, ME 2013, 'Comparative assessment of the timing of sexual maturation in male Wistar Han and Sprague-Dawley rats', Reproductive Toxicology, vol. 38, pp. 16-24. https://doi.org/10.1016/j.reprotox.2013.02.003
Campion, Sarah N. ; Carvallo chaigneau, Francisco R ; Chapin, Robert E. ; Nowland, William S. ; Beauchamp, David ; Jamon, Raul ; Koitz, Rebecca ; Winton, Timothy R. ; Cappon, Gregg D. ; Hurtt, Mark E. / Comparative assessment of the timing of sexual maturation in male Wistar Han and Sprague-Dawley rats. In: Reproductive Toxicology. 2013 ; Vol. 38. pp. 16-24.
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