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Written Paper

Effect of copper deficiencies on the reproduction and effectiveness of new biotechnologies for bovine cattle in Cuba. Review  [2009]

Pedroso, R., Centro de Investigaciones para el Mejoramiento Animal de la Ganadería Tropical Roller, F., Centro de Investigaciones para el Mejoramiento Animal de la Ganadería Tropical

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The impact of copper (Cu) deficiency on the reproduction and efficacy of new biotechnologies is reviewed and some aspects of the action mechanism are identified. Hypocuprosis is the second most frequent mineral deficiency found in grazing ruminants in Cuba, affecting more than 30% of the cattle. Routine diagnosis in the animal is based on the predictive cupremia value in population studies, the measurements of liver Cu and the activity of the Cu-dependent enzymes in the confirmative verdict. Hypocuprosis is associated to anoestrus reproductive failures, heat repetitions, abortion and uterine infections, poor development rate and embryonic growth. The participation of the hypothalamus-hypophysis axis in its action mechanism has not been proven. New explanations to these phenomena are searched for in the synthesis failures or the secretion of ovarian hormones, given the progress reached in substitutive hormonal therapy of the anoestrus treatment in Cu supplemented animals. Immunesuppresion accompanying this deficiency accounts for its relationship with uterine infections. The response to oral or parenteral Cu supplementation was effective to solve this problem in grazing cows. It is concluded that the identification of molecular and cellular changes linked to hypocuprosis in ovaries, hypophysis and in vitro cultivated embryos can contribute with important data that would facilitate the application of new biotechnological procedures.

From the journal

Ciencia y Tecnología Ganadera

ISSN : 1998-3050

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