Características do ejaculado de caprinos sob estresse calórico em câmara bioclimática

Coelho, Lia de Alencar; Sasa, Aya; Nader, Carlos Eduardo; Celeguini, E.C.C.

doi:10.1590/s0102-09352006000400015

Cited by 7 publications

(1 citation statement)

References 9 publications

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“…According to the descriptions above, testicular heat shock was detrimental to the maintenance of gamete quality, regardless of administration of green tea extract, which is rich in antioxidants (Schmitz et al, 2005), with day 30 representing the moment of maximum impairment. The deleterious action of the high temperature on seminal parameters has been described in previous studies, and evidenced by a reduction in the volume, concentration, morphology, motility, vigor, and plasma membrane integrity of semen samples (Coelho et al, 2006;Ghasemi et al, 2009;Abshenas et al, 2011;Ding et al, 2015). This is a consequence of the sensitivity of testicular germ cells to thermal variations (Absalan et al, 2008).…”

Section: Discussionmentioning

confidence: 83%

Effect of green tea extract (Camellia sinensis) on the spermatic parameters of Wistar rats submitted or not to testicular heat shock

et al. 2020

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The aim of this study was to evaluate the effect of green tea extract (GTE) on the spermatic parameters of Wistar rats, submitted or not to testicular heat shock (HS). For this, 48 animals were treated according to the experimental groups (G1: not exposed to HS and untreated; G2: exposed to HS and untreated; G3: not exposed to HS and treated with GTE; G4: exposed to HS and treated with GTE). Subgroups of rats were euthanized on days 15, 30, and 60 to recover the spermatozoa. The total motility (TM), vigor, spermatic morphology and concentration, mitochondrial membrane potential, plasma membrane integrity, and acrosome integrity (ACi) were analyzed. The TM was higher in G1 and G3 than in G2 and G4 on day 30, and higher in G4 on day 60. The overall means of TM and vigor were higher in G1 and G3 than in G2 and G4, as well as TM on day 60. For the morphology, G2 and G4 were lower than G1 and G3 on day 15, and G4 was lower than G1 and G3 on day 30. Moreover, in G1 and G3 morphology was higher on days 15 and 30, and in G4 it was lower on day 30, with the overall means being higher in G1 and G3 than in G2 and G4, as well as on days 15 and 60 compared to day 30. The overall mean of ACi, on day 30, was lower than on days 15 and 60 for all the groups. Therefore, HS is shown to be widely deleterious to the gametes, and the daily administration of 100 mg/kg green tea extract does not improve the spermatic parameters of Wistar rats, submitted or not to testicular HS, although it leads to better recovery of spermatic motility and morphology at 60 days.

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