Ovum pick up (OPU), Estresse térmico, Competência oocitária

Estresse térmico e Ovum pick up
 
Ovum pick-up (OPU) é uma biotecnologia aplicada à reprodução animal com finalidade de submeter os gametas femininos ao processo da produção de embriões in vitro (PEIV). OPU tenha substituído amplamente ao método de superovulação (Boni, 2012).
 
Mas, esta biotecnologia é afeitada por vários fatores entre si as condições de estresse como um fator biológico (BOVIMATA, 2021), sendo que o estresse térmico (ET) é uma das condições principais de estresse que afeita à reprodução em fêmea bovina (Camargo, 2015), destaca-se o seu efeito na competência oocitária. A competência oocitária (O potencial de um oócito para produzir embriões viáveis) é menor na estação do calor em comparação com a fria (Putney et al., 1989; Roth et al., 2001; Torres-Júnior et al., 2008).
 
Referências
 
Boni, R. (2012). Ovum pick-up in cattle: a 25 yr retrospective analysis. Animal Reproduction, 9(3), 362–369.
BOVIMATA. (2021, January 22). Você já ouviu falar na Ovum pick-up? Bovinmata. https://www.instagram.com/accounts/login/?igshid=10c2b4gegg32n
 
 
Putney, D. J., Mullins, S., Thatcher, W. W., Drost, M., & Gross, T. S. (1989). Embryonic development in superovulated dairy cattle exposed to elevated ambient temperatures between the onset of estrus and insemination. Animal Reproduction Science, 19(1–2), 37–51.
 
Roth, Z., Arav, A., Bor, A., Zeron, Y., Braw-Tal, R., & Wolfenson, D. (2001). Improvement of quality of oocytes collected in the autumn by enhanced removal of impaired follicles from previously heat-stressed cows. Reproduction, 737–744.
 
Torres-Júnior, J. R. S., Pires, M. F. A., de Sá, W. F., Ferreira, A. M., Viana, J. H. M., Camargo, L. S. A., Ramos, A. A., Folhadella, I. M., Polisseni, J., de Freitas, C., Clemente, C. A. A., de Sá Filho, M. F., Paula-Lopes, F. F., & Baruselli, P. S. (2008). Effect of maternal heat-stress on follicular growth and oocyte competence in Bos indicus cattle. Theriogenology, 69(2), 155–166.


Atenciosamente, 
 

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