Affiliation:
1. Universidade Estadual do Maranhão, Brasil
Abstract
ABSTRACT We aimed to assess the effects of melatonin in the in vitro production of bovine embryos. Our experiment was conducted at the Laboratório de Reprodução Animal of the Universidade Estadual do Maranhão. The cumulus-oocyte complexes (COCs) were distributed among treatments at concentrations of 0, 10-1, 10-3 and 10-5 µMol/L melatonin. Our experiment was further divided into two: the first was to assess the effect of different concentrations of melatonin (treatments) on the maturation rate of COCs, and the second was to assess the effects of melatonin treatments on the in vitro production of bovine embryos. The results from the first experiment demonstrated no significant difference between the in vitro maturation rate of the cultivated COCs in treatments with melatonin. In the second experiment, however, melatonin treatments yielded statistically higher cleavage, morula and blastocyst rates in the 10-5 µM group (52.9%, 52.9%, and 35.3%, respectively), and lower rates in the 10-1 µM group (19.5%, 19.5% and 7.8%, respectively), compared to the others. The control group (no melatonin) and the 10-3 µM group showed similar results. We concluded that supplementation of melatonin in the in vitro maturation medium resulted in no improvement in the oocyte maturation rate, but in the in vitro production of embryos at different concentrations, the 10-5 µM group displayed better results, but with no improvement in the variables (P < 0.05).
Subject
Animal Science and Zoology
Reference22 articles.
1. Nuclear maturation kinetics and in vitro embryo development of cattle oocytes prematured with butyrolactone I combined or not combined with roscovitine;ADONA P. R.;Animal Science Reproduction,2008
2. Statistics of Embryo Collection and Transfer in Domestic Farm Animals;Embryo Transfer Newsletter,2014
3. Gene expression and chromatin structure in the pre-implantation embryo;KANKA J.;Theriogenology,2003
4. Embryonic genomic activation;LATHAM K.E.;Front Biosci,2001
5. Embryo development and survival during preimplantation period: focus in ruminants;LIMA I. M. T.;Rev. Bras. Reprod. Anim.,2009
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