alexa Effects of Probiotic on Zebrafish Reproduction
ISSN: 2155-9546

Journal of Aquaculture Research & Development
Open Access

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Research Article

Effects of Probiotic on Zebrafish Reproduction

Giorgia Gioacchini1, Francesco Lombardo1, Daniel L. Merrifield2, Stefania Silvi3, Alberto Cresci3, Matteo Alessandro Avella1 and Oliana Carnevali1*

1Dipartimento di Scienze del Mare, Università Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy

2Aquaculture and Fish Nutrition Research Group, School of Biomedical and Biological Sciences, University of Plymouth, UK

3Università di Camerino, Scuola di Bioscienze e Biotecnologie, Via Gentile III da Varano, I-62032 Camerino (MC), Italy

*Corresponding Author:
Oliana Carnevali
Università Politecnica delle Marche
Dipartimento di Scienze del Mare
Via Brecce Bianche, 60131 Ancona, Italy
Tel: +39 071-2204990
Fax: +39 071-2204650
E-mail: [email protected]

Received Date: June 28, 2011; Accepted Date: July 07, 2011; Published Date: September 10, 2011

Citation: Gioacchini G, Lombardo F, Merrifield DL, Silvi S, Cresci A, et al. (2011) Effects of Probiotics on Zebrafish Reproduction. J Aquac Res Development S1:002. doi:10.4172/2155-9546.S1-002

Copyright: © 2011 Gioacchini G, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Recent studies have demonstrated that probiotics can influence reproductive performance, however, the mechanisms influencing oogenesis remain poorly explored. In this study, the effects of dietary probiotic Lactobacillus rhamnosus IMC 501 ® administration was investigated on female zebrafish ( D. rerio ) reproductive performance and ovarian development (both growth and maturation phases). After feeding the zebrafish experimental diets for 10 days, real-time PCR and culture based methods revealed alterations on gut microbiota, characterised by high levels of L. rhamnosus IMC 501 ® in the gut of probiotic treated zebrafish, which were absent in the control. The microbial modulation in the gut was related with a significant increase of the gonadosomatic-index (GSI) associated, at the molecular level, to a significant increase of ovarian expression of cytochrome p 19 (cyp19a), hepatic vitellogenin (vtg) and the α isoform of the estradiol receptor (erα) genes evidencing a positive role of probiotic administration on the ovarian growth phase. Concomitantly, a significant increase of signals which positively control the maturation phase such as, cyclin B, activinβA1 and small mother against decapentaplegic 2 (smad2) genes in the ovary led us to confirm the beneficial role of the probiotic on maturation processes. Next to the enhancement of oocyte development processes by probiotic administration, an improvement of fecundity was evidenced which was associated with the increase of cyclooxygenase 2a (cox2a) gene expression in the ovary. The significance of the results obtained herein underlines the importance of diet and gut microbes in the reproductive processes, supporting the hypothesis that feed additives could improve fecundity.

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