The effects of short photoperiod, pinealectomy, and melatonin treatment on oxytocin synthesis and release in the male syrian hamster

Endocrine ◽  
1996 ◽  
Vol 4 (3) ◽  
pp. 223-231 ◽  
Author(s):  
Marlena Juszczak ◽  
Richard W. Steger ◽  
Luciano Debeljuk ◽  
Clare Fadden ◽  
Jaladanki N. Rao ◽  
...  
Keyword(s):  
Syrian Hamster ◽  
Short Photoperiod ◽  
Melatonin Treatment

Effects of Short Photoperiod and Melatonin Treatment on Thermogenesis in the Syrian Hamster

1986 ◽  
Vol 3 (4) ◽  
pp. 311-321 ◽  
Author(s):  
Mohan Viswanathan ◽  
Raimo Hissa ◽  
John C. George
Keyword(s):  
Syrian Hamster ◽  
Short Photoperiod ◽  
Melatonin Treatment

Neurohypophyseal Vasopressin in the Syrian Hamster: Response to Short Photoperiod, Pinealectomy, Melatonin Treatment, or Osmotic Stimulation

1997 ◽  
Vol 42 (3) ◽  
pp. 221-225 ◽  
Author(s):  
Marlena Juszczak ◽  
Luciano Debeljuk ◽  
Bozena Stempniak ◽  
Richard W Steger ◽  
Clare Fadden ◽  
...  
Keyword(s):  
Syrian Hamster ◽  
Short Photoperiod ◽  
Melatonin Treatment ◽  
Osmotic Stimulation

Testicular histomorphometry and the proliferative and apoptotic activities of the seminiferous epithelium in Syrian hamster during spontaneous recrudescence after exposure to short photoperiod

2018 ◽  
Vol 53 (5) ◽  
pp. 1041-1051 ◽  
Author(s):  
Jesús Martínez-Hernández ◽  
Vicente Seco-Rovira ◽  
Ester Beltrán-Frutos ◽  
Concepción Ferrer ◽  
Manuel Canteras ◽  
...  
Keyword(s):  
Syrian Hamster ◽  
Seminiferous Epithelium ◽  
Short Photoperiod

scholarly journals Conflicting effects of exercise on the establishment of a short-photoperiod phenotype in Syrian hamster

2005 ◽  
Vol 288 (1) ◽  
pp. R234-R242 ◽  
Author(s):  
Jerome S. Menet ◽  
Patrick Vuillez ◽  
Daniel Bonn ◽  
Aurore Senser ◽  
Paul Pévet
Keyword(s):  
Syrian Hamster ◽  
Wheel Running ◽  
Biological Clock ◽  
Inhibitory Response ◽  
Day Length ◽  
Short Photoperiod ◽  
Short Day ◽  
Running Activity ◽  
Testicular Regression ◽  
Wheel Running Activity

In the Syrian hamster, winter seasonal inhibition of reproduction occurs in response to decreasing day length. This inhibitory response is modulated by nonphotic cues. In particular, access to a running wheel has been shown to produce incomplete gonadal regression. The present study sought to determine whether this occurs as a consequence of wheel effect on adaptation of the circadian system to short days or whether downstream physiological responses are involved. Short-day adaptation of the circadian clock, which is located in the suprachiasmatic nucleus (SCN) of the hypothalamus, was tested by lengthening the photosensitive phase of the SCN (assayed by light-induced c-Fos expression in the SCN) as a parameter. We found that wheel-running activity does not inhibit the integration of the photoperiodic change by the SCN even if complete testicular regression is prevented. Moreover, this exercise was even capable of accelerating the lengthening of the photosensitive phase after the transfer to short day length. Thus, although wheel-running activity inhibits the short photoperiod-induced gonadal regression, it acts on the SCN to accelerate the integration of the photoperiodic change by the biological clock.

Effect of Long and Short Photoperiod and/or Pinealectomy on Immunoreactive Somatostatin in the Syrian Hamster

1985 ◽  
Vol 17 (02) ◽  
pp. 107-108 ◽  
Author(s):  
S. Webb ◽  
T. Champney ◽  
M. Vaughan ◽  
R. Reiter
Keyword(s):  
Syrian Hamster ◽  
Short Photoperiod

Delayed Puberty in the Male Djungarian Hamster: Effect of Short Photoperiod or Melatonin Treatment on the GnRH Neuronal System

1991 ◽  
Vol 54 (2) ◽  
pp. 96-102 ◽  
Author(s):  
Kevin L. Buchanan ◽  
Steven M. Yellon
Keyword(s):  
Short Photoperiod ◽  
Delayed Puberty ◽  
Neuronal System ◽  
Djungarian Hamster ◽  
Melatonin Treatment

Interactions of Testosterone and Short-Photoperiod Exposure on the Neuroendocrine Axis of the Male Syrian Hamster

1986 ◽  
Vol 43 (1) ◽  
pp. 69-74 ◽  
Author(s):  
Richard W. Steger ◽  
Kathleen S. Matt ◽  
Andrzej Bartke
Keyword(s):  
Syrian Hamster ◽  
Short Photoperiod ◽  
Neuroendocrine Axis

Interactions of Pinealectomy and Short-Photoperiod Exposure on the Neuroendocrine Axis of the Male Syrian Hamster

1984 ◽  
Vol 38 (2) ◽  
pp. 158-163 ◽  
Author(s):  
Richard W. Steger ◽  
Russel J. Reiter ◽  
Theresa M. Siler-Khodr
Keyword(s):  
Syrian Hamster ◽  
Short Photoperiod ◽  
Neuroendocrine Axis

Comparison of the Effects of Short Photoperiod Exposure and Melatonin Treatment in Ovariectomized LSH/SsLak Hamsters

1989 ◽  
Vol 7 (3) ◽  
pp. 291-303 ◽  
Author(s):  
Ursula E. Hauser ◽  
Bryant Benson
Keyword(s):  
Short Photoperiod ◽  
Melatonin Treatment
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