Modification of testicular and thyroid function by chronic exposure to short photoperiod

A comparison in four rodent species

L. J. Petterborg, M. K. Vaughan, L. Y. Johnson, Thomas Champney, R. J. Reiter

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

1. 1. Exposure of male Syrian hamsters (Mesocricetus auratus) for 10 weeks to short photoperiod (SP) providing 10hr light:14hr darkness (10:14 LD) produced a significant reduction in the weights of the reproductive organs, plasma thyroxine (T4) levels and free T4 index (FT4I) compared to the values of animals exposed to long photoperiod (LP, 14:10 LD). 2. 2. C57bl male house mice (Mus musculus) kept in SP (10:14 LD) had reproductive organ weights equivalent to those of mice kept in long days (14:10 LD) and lower T3 uptake (T3U) values. 3. 3. Male gerbils (Meriones unguiculatus) exposed to 13 weeks of SP (10:14 LD) had lower body weights, testes and seminal vesicle weights and higher T,U values compared to LP (14:10 LD) controls. However, no effect was seen on plasma T4 and triiodothyronine (T3,) values nor the FT4I and free T3 index (FT3,I). 4. 4. White-footed male mice (Peromyscus leucopus) exposed to SP (8:16 LD) had significantly lower testes and seminal vesicle weights while plasma T4 and T3 levels were unaffected. 5. 5. Snell strain house mice (Mus musculus) exposed to SP (8:16 LD) had normal reproductive organ weights compared to the values of LP-exposed (16:8 LD) control animals. However, there was a significant depression in T3 and in the FT3I in the SP animals.

Original languageEnglish
Pages (from-to)31-34
Number of pages4
JournalComparative Biochemistry and Physiology -- Part A: Physiology
Volume78
Issue number1
DOIs
StatePublished - Jan 1 1984
Externally publishedYes

Fingerprint

Photoperiod
Rodentia
Thyroid Gland
Animals
Plasmas
Organ Size
Peromyscus
Triiodothyronine
Gerbillinae
Thyroxine
Seminal Vesicles
Mesocricetus
Testis
Weights and Measures
Darkness
Weight Loss
Body Weight
Light

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Biochemistry

Cite this

Modification of testicular and thyroid function by chronic exposure to short photoperiod : A comparison in four rodent species. / Petterborg, L. J.; Vaughan, M. K.; Johnson, L. Y.; Champney, Thomas; Reiter, R. J.

In: Comparative Biochemistry and Physiology -- Part A: Physiology, Vol. 78, No. 1, 01.01.1984, p. 31-34.

Research output: Contribution to journalArticle

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