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Delivery of cloned offspring: experience in Zebu cattle (Bos indicus)
Flávio V.
Meirelles A E,
Eduardo H.
Birgel B,
Felipe
Perecin A,
Marcelo
Bertolini D,
Anneliese S.
Traldi B,
José Rodrigo V.
Pimentel B,
Eliza R.
Komninou B,
Juliano R.
Sangalli A,
Paulo Fantinato
Neto A,
Mariana Tikuma
Nunes B,
Fábio Celidonio
Pogliani B,
Flávia D. P.
Meirelles A,
Flávia S.
Kubrusly C,
Camila I.
Vannucchi B,
Liege C. G.
Silva B
A
Faculty of Animal Sciences and Food Engineering, University of São Paulo, Av. Duque de Caxias Norte, 225. Pirassununga, SP 13635-900, Brazil.
B
Faculty of Veterinary Medicine and Animal Sciences, University of São Paulo, Av. Orlando Marques de Paiva, 87. Pirassununga, SP 05508-270, Brazil.
C
Instituto Butantan, Av. Vital Brasil, 1500 São Paulo, SP 05503-900, Brazil.
D
Center of Agronomy and Veterinary Sciences, Santa Catarina State University, Av. Luiz de Camões, 2090. Lages, SC 88520-000, Brazil.
E
Corresponding author. Email: meirellf@usp.br
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Reproduction, Fertility and Development 22(1) 88–97 http://dx.doi.org/10.1071/RD09229
Published online: 8 December 2009
Abstract
The production of a healthy cloned calf is dependent on a multitude of successful steps, including reprogramming mediated by the oocyte, the development of a functional placenta, adequate maternal–fetal interaction, the establishment of a physiological metabolic setting and the formation of a complete set of well-differentiated cells that will eventually result in well-characterised and fully competent tissues and organs. Although the efficiency of nuclear transfer has improved significantly since the first report of a somatic cell nuclear transfer-derived animal, there are many descriptions of anomalies concerning cloned calves leading to high perinatal morbidity and mortality. The present article discusses some our experience regarding perinatal and neonatal procedures for cloned Zebu cattle (B. indicus) that has led to improved survival rates in Nellore cloned calves following the application of such ‘labour-intensive technology’.
Keywords:
bovine, nuclear transfer, parturition.
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