Therapeutics · Emerging Therapies
Abstract
Heat stress is one of the environmental causes of damage to the testis, whose effects are less known before puberty. The aim of the present study was to investigate the impact of photobiomodulation (PBM) on the testis of prepubertal mice subjected to hyperthermia.
Twenty-four three-week-old prepubertal male mice were allocated to the following groups: I) control, II) scrotal hyperthermia (Hyp), and III) Hyp+PBM (n=8/each group). In order to induce hyperthermia, the scrotum was placed in water at 43 °C for 20 minutes every other day for a total duration of 10 days. In the Hyp+PBM group, after hyperthermia induction, the testis of the mice was subjected to laser irradiation at a wavelength of 890 nm (0.03 J/cm2 for 30 seconds) for 35 days. After the mice were sacrificed, the testis and epididymis were removed for testing.
Compared with those of the Hyp group, the sperm parameters of the laser irradiation group improved notably. In addition, histological examinations revealed that the final number of testis cells and the volume of tissue in the Hyp+PBM group were dramatically greater than those in the Hyp group. The analysis of molecular data revealed an increase in the expression of mitotic genes and testosterone levels and a decrease in the formation of reactive oxygen species (ROS) and the expression of the apoptotic gene in the testis subjected to PBM.
Based on the present findings, laser therapy can reduce complications caused by scrotal hyperthermia during prepuberty and ameliorate spermatogenesis during puberty.
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By this author
Photobiomodulation Therapy Improves Spermatogenesis in Busulfan-Induced Infertile Mouse
Rezaei F et al., 2021 · Reproductive sciences (Thousand Oaks, Calif.)
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Photobiomodulation restores spermatogenesis in the transient scrotal hyperthermia-induced mice
Hasani A et al., 2020 · Life sciences
Heat stress shock affects the generation of free radicals and can have a harmful effect on spermatogenesis. Photobiomodulation (PBM) is very effective in andrology for treating male infertility. This research aimed at the evaluation of the impacts of PBM on spermatogenesis on the transient scrotal hyperthermia-induced oligospermia mouse model. This experimental research divided 24 mice into the following four groups: (1) Control, (2) Scrotal hyperthermia, (3) Scrotal hyperthermia receiving laser 0.03 J/cm2 for 30 s for each testis, 35 days after induction of scrotal hyperthermia every other day for 35 days, and (4) Scrotal hyperthermia receiving laser 0.03 J/cm2 for 30 s for each testis, immediately after induction of scrotal hyperthermia every other day for 35 days. Scrotal hyperthermia was induced by water bath with 43 °C for 30 min. Then, the mice were euthanized, and their sperm samples were collected for sperm parameters analysis. Then, we took the testis samples for histopathological experimentations, serum testosterone level, reactive oxygen species (ROS), RNA extraction for the examination of IL1-α, IL6 and TNF-α genes expression as well as production and glutathione disulfide (GSH) activity. Our outputs indicated that PBM could largely improve the sperms parameters and stereological parameters, like spermatogonia, primary spermatocyte, round spermatid and Leydig cells together with an increasing level of the serum testosterone and GSH activity compared to the scrotal hyperthermia induced mice. In addition, it was found that the diameter of seminiferous tubules, ROS production, as well as the expression of IL1-α, IL6, and TNF-α genes significantly decreased in the treatment groups by PBM compared to the scrotal hyperthermia induced mice, but there was not a significant difference in terms of testis weight and Sertoli cells between the studied groups. It could be concluded that PBM may be regarded as an alternative treatment for improving the spermatogenesis process in the scrotal hyperthermia induced mice.
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Eghbaldoost A et al., 2023 · Journal of lasers in medical sciences
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Poorhassan M et al., 2022 · Journal of lasers in medical sciences
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