Effects of photoperiod on testicular functions in male sprague-dawley rats

Olayaki, Luqman Aribidesi; Soladoye, Ayodele O.; Salman, Toyin Mohammed; Joraiah, B

doi:10.4314/njps.v23i1-2.54915

Cited by 7 publications

(5 citation statements)

References 27 publications

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“…Serum testosterone, testicular weight, diameter of seminiferous tubules, Leydig cell mitochondria and cytoplasmic secretory granules, sperm motility, viability and count are increased by long photoperiods [12,54,55]. All of these parameters decline with aging [56,57] along with the levels of TRH and TRH-like peptides in brain and peripheral tissues [3].…”

Section: Discussionmentioning

confidence: 99%

TRH and TRH-Like Peptide Levels Co-Vary with Reproductive and Metabolic Rhythms

Pekary

Sattin

2016

Horm Metab Res

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Photoperiod-synchronized rhythms in non-CSN tissues persist in total darkness. Clock genes involved in maintaining regular biorhythms within the suprachiasmatic nucleus (SCN) of the hypothalamus are expressed in extra-CNS tissues and continue periodic expression in vitro. Understanding the details of how the SCN clock is coupled with peripheral clocks is only incompletely understood and may involve a multiplicity of feedback systems. The present study is an extension of our previous work showing that brain levels of TRH (pGlu-His-Pro-NH) and TRH-like peptides (X-TRH: pGlu-X-Pro-NH, where "X" can be any amino acid residue) fluctuate throughout the day-night cycle. Male rats were maintained in a stable environment, lights on 6-18 h. TRH and TRH-like peptides in liver, pancreas, testis, prostate, epididymis, and heart were measured at 3, 10, 16, and 22 h. The greatest change in peptide level was a 12-fold increase for TRH in prostate at 16 h relative to the corresponding value at 3 h. The TRH, Tyr-TRH and Phe-TRH levels in liver declined steadily to about 40% of the 3-h values by 22 h. Changes, in the order of decreasing number of significant increases (↑) and/or decreases (↓), were: testis (5↑, 1↓), liver (3↓), epididymis (2↑), prostate (1↑, 1↓) and heart (1↑). Peptide levels in liver and testis correlated with serum leptin and serum corticosterone, respectively, which are potent releasers of these peptides. Testosterone and glucose were also highly correlated. These tripeptides may participate in the regulation of metabolic and reproductive functions, which change during the day-night cycle.

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Section: Discussionmentioning

confidence: 99%

TRH and TRH-Like Peptide Levels Co-Vary with Reproductive and Metabolic Rhythms

Pekary

Sattin

2016

Horm Metab Res

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“…Some diurnal rodents, such as fat sand rats (Psammomys obesus; males), Nile grass rats (Arvicanthis niloticus; males), and nocturnal rodents (Rattus norvegicus [Wistar rats]), presented numerous traits that were modulated by the specific photoperiod, including negative affective responses [12][13][14]. Sprague-Dawley rats are photoresponsive, and changes in the photoperiod can influence their reproductive functions [15]. However, whether mood states in Sprague-Dawley rats are photoresponsive has not been previously studied, and the role of a short photoperiod in the susceptibility to stress in adolescence is unknown.…”

Section: Introductionmentioning

confidence: 99%

Short photoperiod condition increases susceptibility to stress in adolescent male rats

Liu

Yuan

et al. 2016

Behavioural Brain Research

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“…On the other hand, Ben Saad and Maurel (2002) reported that short photoperiod has an improvement effect on male reproductive characteristics in wild rabbits. Moreover, long photoperiod resulted in non-significant increase in sperm properties, but it increased the testis weight (Olayaki et al 2008). This result disagree with Petrocelli et al (2015), who showed that long photoperiod has significantly effect on the sperm concentration.…”

Section: Discussionmentioning

confidence: 66%

Effect of Exogenous Melatonin Treatment on the Reproductive Characteristics and Progeny of Male Rats Exposed to Different Periods From Light and Darkness

Majrashi

Barakat

Alhimaidi³

et al. 2017

Physiol Res

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Light is an important environmental factor that controls the regulation of physiological functions of organisms. Melatonin is considered as one of the major hormones that play an important role in protecting body from many harmful effects and acts as a powerful anti-oxidant source to controlling the levels of antioxidant enzymes within the body. The main objectives of this work were to study the effect of 1) photoperiod changes and 2) exogenous melatonin hormone treatment on the sperm properties, body and testis weight, embryo characteristics, and concentration level of melatonin and testosterone in treated rat serum. This study has been conducted using thirty-six male rats and one hundred and twenty female rats. Animals were divided into six groups, each group containing six males and twenty female rats. Our results showed a significant influence of photoperiod changes on the melatonin and testosterone hormones concentration in rats’ serum, body weight only, while the other characteristics not affected. As for the effect of melatonin it has been found that the movement of sperm in GIII and IV, as well as embryos absorbed and newborns weight traits has been significantly affected, while the rest of the properties were not significantly affected by melatonin treatment.

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Effects of photoperiod on testicular functions in male sprague-dawley rats

Cited by 7 publications

References 27 publications

TRH and TRH-Like Peptide Levels Co-Vary with Reproductive and Metabolic Rhythms

TRH and TRH-Like Peptide Levels Co-Vary with Reproductive and Metabolic Rhythms

Short photoperiod condition increases susceptibility to stress in adolescent male rats

Effect of Exogenous Melatonin Treatment on the Reproductive Characteristics and Progeny of Male Rats Exposed to Different Periods From Light and Darkness

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