Recovery of normal testicular temperature after scrotal heat stress in rams assessed by infrared thermography and its effects on seminal characteristics and testosterone blood serum concentration

Alves, Maíra Bianchi Rodrigues; Andrade, André Furugen Cesar de; Arruda, Rubens Paes de; Batissaco, Leonardo; Florez-Rodriguez, S. A.; Oliveira, Bruna Marcele Martins de; Ravagnani, Gisele Mouro; Filho, Roberto Romano do Prado; Vellone, Vinícius Silva; Losano, João Diego de Agostini; Franci, Celso Rodrigues; Nichi, Marcílio; Celeghini, Eneiva Carla Carvalho

doi:10.1016/j.theriogenology.2016.02.034

Cited by 60 publications

(40 citation statements)

References 36 publications

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“…Most of these high‐temperature‐induced impairments in the epididymis were efficiently counteracted by dietary zinc supplementation (Z. Li, Li, Zhou, Cao, & Li, ). In rams, testosterone blood serum concentrations significantly decreased after HS by scrotal insulation (32.3 vs 30.6°C); however, animals slowly restored their reproductive performance, showing a time‐by‐treatment interaction (Alves et al, ). In male rats, long‐term exposure to high temperatures (43°C for 30 min/day for 15 days) caused a significant reduction in serum testosterone and generated oxidative stress as assessed by lower levels of testicular superoxide dismutase, catalase (CAT), and glutathione.…”

Section: Reproductive Endocrinologymentioning

confidence: 99%

“…In rams, 3 days after HS by scrotal insulation (32.3°C vs. 30.6°C), the animals slowly restored their reproductive performance, showing a time‐by‐HS interaction for total sperm and progressive motility, abnormal spermatozoa, membranes integrity, induced thiobarbituric acid reactive substances and DNA integrity. Semen characteristics were partially recovered 35 days after HS; however, sperm abnormalities returned to control values after 63 days (Alves et al, ). Specific treatments and managerial interventions could help to mitigate or counteract the effects of HS on semen quality.…”

Section: Male Reproductive Apparatusmentioning

confidence: 99%

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Heat stress, a serious threat to reproductive function in animals and humans

Boni

2019

Molecular Reproduction Devel

106

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Global warming represents a major stressful environmental condition that compromises the reproductive efficiency of animals and humans via a rise of body temperature above its physiological homeothermic point (heat stress [HS]). The injuries caused by HS on reproductive function involves both male and female components, fertilization mechanisms as well as the early and late stages of embryofetal development. This occurrence causes great economic damage in livestock, and, in wild animals creates selective pressure towards the advantages of better-adapted genotypes to the detriment of others. Humans undergo several types of stress, including heat, and these represent putative causes of ongoing progressive decay in procreation; an increasing number of remedies in the form of antioxidant preparations are now being proposed to counteract the effects of stress. This review aims to describe the results of the most recent studies that aimed to highlight these effects and to draw information on the mechanisms acting as the basis of this problem from a comparative analysis. K E Y W O R D S follicle, global warming, heat stress, mitochondria, oocyte, reproductive activity, spermatozoa Mol Reprod Dev. 2019;86:1307-1323.wileyonlinelibrary.com/journal/mrd

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Section: Reproductive Endocrinologymentioning

confidence: 99%

Section: Male Reproductive Apparatusmentioning

confidence: 99%

Heat stress, a serious threat to reproductive function in animals and humans

Boni

2019

Molecular Reproduction Devel

106

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“…The exposure of testes to an increase of temperature can impair fertility through the alteration of sperm parameters (number, motility and morphology) and the damage of sperm membrane integrity [ 128 – 131 ]. The temperature of the scrotal sac reflects testicular temperature and its thermoregulation is fundamental defensive mechanisms [ 132 ].…”

Section: Introductionmentioning

confidence: 99%

Lifestyle and fertility: the influence of stress and quality of life on male fertility

Ilacqua

Izzo

Emerenziani

et al. 2018

Reprod Biol Endocrinol

208

146

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BackgroundMale infertility is a widespread condition among couples. In about 50% of cases, couple infertility is attributable to the male partner, mainly due to a failure in spermatogenesis. In recent times, the crucial role that modifiable lifestyle factors play in the development of infertility have generated a growing interest in this field of study, i.e. aging, psychological stress, nutrition, physical activity, caffeine, high scrotal temperature, hot water, mobile telephone use. Several studies have investigated associations between semen quality and the presence of lifestyle stressors i.e. occupational, life events (war, earthquake, etc.) or couple infertility; overall, these studies provide evidence that semen quality is impaired by psychological stress. In this review, we will discuss the impact of quality of life (modifiable lifestyle factors) and psychological stress on male fertility. In addition, the role that increased scrotal temperature along with inappropriate nutritional and physical exercise attitudes exert on male fertility will be presented.ConclusionThe decline of male fertility, particularly associated with advancing age, incorrect lifestyles and environmental factors plays an important role on natality, and its consequences on the future on human population makes this an important public health issue in this century. Thus, modification of lifestyle through a structured program of educational, environmental, nutritional/physical exercise and psychological support, combined with the use of nutraceutical antioxidants can prevent infertility and therefore, may help couples to obtain better quality of life and improved possibility to conceive spontaneously or optimize their chances of conception.

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“…The arrival of a technological innovation generates a large impact on elements of an industry (HANNACHI; TICHIT, 2016). The use of thermographic images have long been used in production systems as a technological tool in the diagnosis of diseases (MCMANUS et al, 2016), as in studies of parasitic tick infestation in cattle (CORTIVO et al, 2016), in bioclimatology (CARDOSO et al, 2016; GEORGE, 2014 ) on animal welfare (STEWART et al, 2005) and animal reproduction (SCOLARI et al, 2009;RAMIRES NETO et al, 2011;SIMÕES et al, 2014;CRUZ JÚNIOR et al, 2015;ALVES et al, 2016). In present study, the identification of estrous in goats showed that the infrared thermography can be a promising technique, and to a highly repeatable method for evaluation of skin temperature in goats.…”

Section: Discussionmentioning

confidence: 99%