Abstract
The effects of a commercial probiotic diet supplement (Bactocell®), containing lactic acid bacteria Pediococcus acidilactici were evaluated by identifying five zebrafish (Danio rerio) sperm quality markers. P. acidilactici (106 colony-forming units per gram) was supplied to young zebrafish males (age 8 months) as a feed probiotic additive during a 10 days test period. Five transcripts, previously described as male zebrafish quality markers, were studied: brain-derived neurotrophic factor (bdnf), BCL2-interacting killer (bik), double-sex and mab-3 related transcription factor 1 (dmrt1), follicle-stimulating hormone beta subunit (fshb) and leptin a (lepa). After exposition, males fed on with the supplemented diet with a commercial probiotic containing P. acidilactici presented an over-expression on three fertility markers comparing to the control group: lepa, dmrt1 and bdnf. These results suggest that P. acidilactici has a potential use as probiotic supplement in zebrafish diet for the improvement of molecular parameters in testicular cells, indicating that probiotic supplementation could affect male reproductive performance.
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