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In vitro effects of aqueous extract of fermented rooibos (Aspalathus linearis) on human sperm function
Author(s) -
Takalani Ndivhuho Beauty,
Adefolaju Gbenga Anthony,
Henkel Ralf,
Opuwari Chinyerum Sylvia
Publication year - 2021
Publication title -
andrologia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.633
H-Index - 59
eISSN - 1439-0272
pISSN - 0303-4569
DOI - 10.1111/and.14114
Subject(s) - sperm , dna fragmentation , semen , traditional medicine , sperm motility , fermentation , reactive oxygen species , chemistry , in vitro , andrology , food science , biology , biochemistry , botany , medicine , apoptosis , programmed cell death
Aspalathus linearis (rooibos) is a herbal medicinal plant originally from South Africa's fynbos and well known for its medicinal effects in treating different medical conditions. Rooibos contains significant levels of antioxidants capable of inhibiting the production of reactive oxygen species, which may improve seminal parameters. This study focussed on investigating the direct effect of fermented rooibos on human sperm functions in vitro. Semen samples collected by masturbation from unproven fertile donors ( n = 25) and infertile patients ( n = 25) after 3–5 days’ abstinence were liquefied and centrifuged (300 × g ; 10 min) in human tubular fluid medium containing 1% bovine serum albumin. Afterwards, semen samples (7.5 × 10 6 /ml) were incubated at 37°C for one hour with aqueous extract of fermented extract in sperm preparation medium (0, 0.10, 1.0, 10 and 100 μg/ml) and assessed. Our data showed that fermented rooibos did not affect functional sperm parameters (motility, vitality, intracellular reactive oxygen species and acrosome reaction, p > .05), in vitro except in the reduced percentage of intact mitochondrial membrane potential and DNA fragmentation ( p < .05). The decrease in DNA fragmentation generates the possibility of using the extract in patients prior to assisted reproductive techniques.