147
Views
4
CrossRef citations to date
0
Altmetric
Article

Photoperiod modulates oestrogen status, insulin interposed glucose uptake and connexin-43 in testes of golden hamster, Mesocricetus auratus

, , &
Pages 655-666 | Received 02 Nov 2018, Accepted 08 Nov 2018, Published online: 23 Nov 2018
 

ABSTRACT

The environmental photoperiod plays an important role in regulation of seasonal reproductive events. However, with reference tooestrogen status the exact mechanism involved in testicular seasonality is still unclear in general and especially in long-day breeder golden hamster, Mesocricetus auratus. Therefore, in the present study we explored the effect of day length (long day, LD and short day, SD) in modulation of oestrogen level, metabolic and gap junction markers expressionin testes. Our results suggest that LD exposureinduced normal testicular activity as evident by histoarchitectural analyses showing different stages of spermatogenesis, spermatozoa filled lumen and normal Leydig cells. Furthermore, LD upregulated testicular metabolic parameters such as IR, GLUT-8, glucose leveland LDH activity along with predominant testicular gap junction protein (Connexin-43) expression as compared to SD. On the other hand, the expressions of ER-α, aromatase and caspase-3 were reduced under LD condition as compared to SD. Thus, it can be inferred that photoperiod modulates the circulatoryoestrogen level, along with gap junction protein and apoptosis markers expression in testes and harmonizes the energy homeostasis involved in reproductive maintenance for seasonality of golden hamster. Therefore, we may conclude that day-length-mediatedoestrogen is a prominent modulator of male reproductive health.

Abbreviations

Insulin receptor (IR); Glucose uptake transporter-8 (GLUT-8); Estrogen receptor-alpha (ER-α); Connexin-43 (Cxn-43); Lactate dehydrogenase (LDH)

Acknowledgments

The author thanks ICMR, New Delhi, India for JRF fellowship to Sriparna Pal (3/1/3/JRF-2017/HRD/56732/76); CSIR, New Delhi, India for JRF fellowship to Jitendra Kumar (09/013(0709)/2017-EMR-I); Alexander von Humboldt Foundation, Bonn, Germany for Instrument Subsidiary Award to Chandana Haldar and UGC-CAS assistance to Department of Zoology, BHU.

Disclosure statement

The authors reported no potential conflict of interest.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.