Please use this identifier to cite or link to this item: http://hdl.handle.net/11189/7505
Title: The effects of rooibos (Aspalathus linearis), green tea (Camellia sinensis) and commercial rooibos and green tea supplements on Epididymal Sperm in oxidative stress-induced rats
Authors: Awoniyi, Dolapo Olaitan 
Aboua, Yapo Guillaume 
Marnewick, Jeanine L 
Brooks, Nicole L 
Keywords: Sperm;catalase;glutathione;green tea (Camellia sinensis);oxidative stress;rooibos (Aspalathus linearis);superoxide dismutase
Issue Date: 2012
Publisher: Wiley
Source: Awoniyi, D. O., Aboua, Y. G., Marnewick, J. et al. 2012. The effects of rooibos (Aspalathus linearis), green tea (Camellia sinensis) and commercial rooibos and green tea supplements on Epididymal Sperm in oxidative stress-induced rats. Psychotherapy Research, 26(8): 1231-1239. [http://doi.org/10.1002/ptr.3717]
Journal: Psychotherapy Research 
Abstract: Reactive oxygen species (ROS) are involved in many physiological functions of mammalian sperm. Numerous endogenous antioxidants belonging to both enzymatic and non-enzymatic groups can remove excess ROS and prevent oxidative stress (OS). This study compares the modulation of OS by rooibos, Chinese green tea and commercial rooibos and green tea supplements in rat sperm. Male Wistar rats (n = 60) were supplemented with fermented rooibos, ‘green’ rooibos, Chinese green tea, rooibos supplement, green tea supplement or water for 10 weeks while OS was induced during the last 2 weeks. Sperm count and motility were significantly higher for rats consuming fermented rooibos and ‘green’ rooibos when compared with the other groups. Catalase activity was significantly higher in the sperm of rats consuming fermented rooibos, ‘green’ rooibos and both the rooibos and green tea supplements. Superoxide dismutase concentration in the sperm of rats supplemented with fermen- ted rooibos, ‘green’ rooibos and green tea was higher. Sperm glutathione levels of rats consuming the fermented and ‘green’ rooibos were also significantly higher. Rooibos fermented and ‘green’ rooibos showed a tendency to lower the levels of ROS and lipid peroxidation when compared with the control group. In conclusion, both rooibos extracts could offer a measure of protection against induced oxidative damage by increasing the antioxi- dant defence mechanisms and thereby improving the sperm quality and function
URI: http://hdl.handle.net/11189/7505
ISSN: 1050-3307
1468-4381
DOI: http://doi.org/10.1002/ptr.3717
Appears in Collections:HWSci - Journal Articles (DHET subsidised)

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