Effects of chronic heat stress on testicular structures, serum testosterone and cortisol concentrations in developing lambs

Rasooli, Aria; Jalali, Mohammad Taha; Nouri, Mohammad; Mohammadian, Babak; Barati, Farid

doi:10.1016/j.anireprosci.2009.03.012

Cited by 61 publications

(34 citation statements)

References 27 publications

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“…In the current study, average daily intake was reduced in the heat group, compared to control and H+Zn groups, in accordance with previous findings. Research has demonstrated that summer heat stress may lead to a small increase in testicular growth in ram lambs (Rasooli et al, 2010). Such an effect was also observed in our study, in which an improved testes index was seen in the heat group, which could be decreased by Zn supplement; this indicates that heat treatment may cause testicular swelling that can be alleviated by supplementation with Zn in feed.…”

Section: Discussionsupporting

confidence: 71%

Dietary zinc may attenuate heat-induced testicular oxidative stress in mice via up-regulation of Cu-Zn SOD

Cao

et al. 2015

Genet. Mol. Res.

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ABSTRACT. Zinc (Zn) is important for male mammalian reproduction. In this study, we sought to clarify the role of Zn in heat-induced testicular damage in mice. Eighteen mice were divided into either control (con), heat (heat) and heat plus Zn (H+Zn) treatment groups, and fed diets containing 60 (con and heat groups) or 300 (H+Zn group) mg/kg Zn sulfate for one month. Mice in the con group were then maintained at 25°C, while mice in heat and H+Zn groups were exposed to 40°C for 2 h daily, for eight days. Mouse testes and serum from each animal were analyzed. Zinc levels in serum and testes were positively correlated to Zn feed concentrations. Mice in the heat group had higher testes index than those in the other two groups (7.22 ± 0.75, heat; 4.92 ± 0.20, con; 4.80 ± 0.30 mg/g, H+Zn; P < 0.05). Testicular antioxidant status showed malondialdehyde levels in heat group mice were increased compared to control mice (2.34 ± 0.15 versus 1.55 ± 0.23 nmol/mg protein; P < 0.05), and Cu-Zn superoxide dismutase (SOD) level differed between heat and H+Zn groups (14.04 ± 0.74 versus 18.27 ± 1.53 U/mg protein; P < 0.05). Testicular Cu-Zn SOD protein expression levels were significantly lower in the heat than in the control 16617 Zinc attenuates heat-induced testicular oxidative stress ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (4): 16616-16626 (2015) group (0.30 ± 0.11 versus 1.22 ± 0.13; P < 0.05). These results suggest that dietary Zn may elevate the activity and protein concentration of Cu-Zn SOD, to attenuate testicular oxidative stress induced by heat exposure.

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Section: Discussionsupporting

confidence: 71%

Dietary zinc may attenuate heat-induced testicular oxidative stress in mice via up-regulation of Cu-Zn SOD

Cao

et al. 2015

Genet. Mol. Res.

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“…Cortisol was measured using LIAISON Ò cortisol assay kit (DiaSorin Inc., USA) according to Rasooli et al (2009). The procedure was competitive luminometric assay based on solid phase antigen-linked technique (SPLT).…”

Section: Discussionmentioning

confidence: 99%

Effect of dietary l-tryptophan on osmotic stress tolerance in common carp, Cyprinus carpio, juveniles

Hoseini

Hosseini

2010

Fish Physiol Biochem

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Common carp juveniles were fed two types of diet (control: 0.1% tryptophan and TRP: 0.6% tryptophan) over 15 days. Thereafter, both groups were directly subjected to osmotic challenge (from 0 to 10 ppt) for 168 h. Blood samples were collected at -240, 0, 6, 24, 72 and 168 h after challenge. Survival and serum cortisol, glucose, sodium and chloride levels were measured to determine stress response and osmoregulation condition. While TRP group showed no mortality until 168 h, cumulative mortality was near 100% at 72 h after challenge in control group. Feeding tryptophan-supplemented diet led to increase in prechallenge cortisol, but not glucose, sodium and chloride values at -240 h that stayed elevated until 0 h after challenge. After challenge, cortisol and glucose values did not significantly affected by time of sampling but type of diet and diet×time interaction. Sodium values significantly affected by diet type and time of sampling but not their interaction. Chloride values significantly affected by time of sampling but not diet type and their interaction. Control group had higher cortisol, glucose and sodium than TRP at each time of sampling. Control and TRP group showed increasing and decreasing pattern in cortisol and glucose values when experiment progressed after osmotic challenge. Both group showed increasing pattern in sodium and chloride values when experiment progressed after osmotic challenge. Results indicated that tryptophan supplementation enhanced salt water tolerance of carp that is due to increase in basal cortisol and anti-stress effect of tryptophan and possibly increase in serotonergic activity.

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“…Water total hardness and alkalinity were determined using portable photometers with commercial kits provided by the manufacturer (Wagtecch Portable Photometer 7100, Berkshire, UK). Cortisol was measured using LIAISON Ò cortisol assay kit (DiaSorin Inc., USA) according to Rasooli et al (2009) and Hoseini and Hosseini (2010). The procedure was competitive luminometric assay based on solid phase antigen-linked technique (SPLT).…”

Section: Analysesmentioning

confidence: 99%

Serum biochemical characteristics of Beluga, Huso huso (L.), in response to blood sampling after clove powder solution exposure

Hoseini

Hosseini

Nodeh

2010

Fish Physiol Biochem

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In order to investigate the effect of anesthesia on serum parameters, Beluga, Huso huso (L.) were blood-sampled immediately without anesthesia (control) or subjected to following anesthesia procedure: 40, 120, and 240 s exposure to 3,000, 700, and 500 mg l⁻¹ clove solution, respectively. Blood samples were collected after these periods, when fish were immobile and reached stage 4 anesthesia. Results showed that cortisol and glucose levels were significantly high in 700 and 500 but not 3,000 mg l⁻¹ group compared to control. Serum lactate levels were significantly high in 500 mg l⁻¹ group compared to control group. Lactate levels were not significantly differed between control, 3,000, and 700 mg l⁻¹ groups. There were no significant differences in serum levels of cholesterol, total protein, lactate dehydrogenase, aspartate aminotransferase, alanine aminotransferase, Na⁺, Cl⁻, K⁺, and Ca²⁺. Results suggest that rapid anesthesia with higher dose is better than slow anesthesia with lower dose for blood sampling in Beluga.

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Effects of chronic heat stress on testicular structures, serum testosterone and cortisol concentrations in developing lambs

Cited by 61 publications

References 27 publications

Dietary zinc may attenuate heat-induced testicular oxidative stress in mice via up-regulation of Cu-Zn SOD

Dietary zinc may attenuate heat-induced testicular oxidative stress in mice via up-regulation of Cu-Zn SOD

Effect of dietary l-tryptophan on osmotic stress tolerance in common carp, Cyprinus carpio, juveniles

Serum biochemical characteristics of Beluga, Huso huso (L.), in response to blood sampling after clove powder solution exposure

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