Lesions in the bed nucleus of the stria terminalis, but not in the lateral septum, inhibit short-photoperiod-induced testicular regression in Syrian hamsters

Martin N. Raitiere, Vasilios T. Garyfallou, Henryk Urbanski

    Research output: Contribution to journalArticle

    12 Citations (Scopus)

    Abstract

    The transfer of adult male hamsters from long days (LD) to short days (SD) (i.e. <12 h of light per day) typically results in marked testicular regression and a decline in plasma testosterone concentrations. To help disclose key brain regions responsible for mediating this photoperiodic response male hamsters received either chemical (i.e. N-methyl-d-aspartate; NMDA) or radiofrequency current lesions in the bed nucleus of the stria terminalis (BNST), and were then exposed to SD for 15 or 12 weeks, respectively. Although body weights were similar between sham-lesioned controls and the NMDA-lesioned hamsters, the latter showed a significant attenuation of testicular regression; additionally, their plasma testosterone concentrations remained at typical LD levels. When radiofrequency current-lesioned hamsters were transferred from LD to SD they also failed to show significant signs of testicular regression, nor a decline in plasma testosterone concentrations, nor a complete arrest of spermatogenesis. In contrast, sham-lesioned controls or hamsters that were lesioned dorsally to the BNST at a site primarily involving the lateral septum all showed the expected degree of testicular regression, a decline in plasma testosterone concentrations, and complete arrest of spermatogenesis; body weights were similar in all of the experimental group. Taken together, these findings suggest that the BNST, a brain area traditionally not associated with reproductive function, may play an important role in mediating photoperiodic information to the neural circuits that control the reproductive axis.

    Original languageEnglish (US)
    Pages (from-to)159-167
    Number of pages9
    JournalBrain Research
    Volume705
    Issue number1-2
    DOIs
    StatePublished - Dec 24 1995

    Fingerprint

    Septal Nuclei
    Mesocricetus
    Photoperiod
    Cricetinae
    Testosterone
    N-Methylaspartate
    Body Weight
    Brain
    Aspartic Acid
    Light

    Keywords

    • N-Methyl-d-aspartate
    • Photoperiodism
    • Testes
    • Testosterone

    ASJC Scopus subject areas

    • Developmental Biology
    • Molecular Biology
    • Clinical Neurology
    • Neuroscience(all)

    Cite this

    Lesions in the bed nucleus of the stria terminalis, but not in the lateral septum, inhibit short-photoperiod-induced testicular regression in Syrian hamsters. / Raitiere, Martin N.; Garyfallou, Vasilios T.; Urbanski, Henryk.

    In: Brain Research, Vol. 705, No. 1-2, 24.12.1995, p. 159-167.

    Research output: Contribution to journalArticle

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