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. 2023:2647:225-244.
doi: 10.1007/978-1-0716-3064-8_12.

Cattle Cloning by Somatic Cell Nuclear Transfer

Juliano Rodrigues Sangalli #  1 , Rafael Vilar Sampaio #  1   2 , Tiago Henrique Camara De Bem #  1 , Lawrence Charles Smith  2 , Flávio Vieira Meirelles  3
Affiliations

Cattle Cloning by Somatic Cell Nuclear Transfer

Juliano Rodrigues Sangalli et al. Methods Mol Biol. 2023.

Abstract

Cloning by somatic cell Nuclear Transfer (SCNT) is a powerful technology capable of reprograming terminally differentiated cells to totipotency for generating whole animals or pluripotent stem cells for use in cell therapy, drug screening, and other biotechnological applications. However, the broad usage of SCNT remains limited due to its high cost and low efficiency in obtaining live and healthy offspring. In this chapter, we first briefly discuss the epigenetic constraints responsible for the low efficiency of SCNT and current attempts to overcome them. We then describe our bovine SCNT protocol for delivering live cloned calves and addressing basic questions about nuclear reprogramming. Other research groups can benefit from our basic protocol and build up on it to improve SCNT in the future. Strategies to correct or mitigate epigenetic errors (e.g., correcting imprinting loci, overexpression of demethylases, chromatin-modifying drugs) can integrate the protocol described here.

Keywords: Cattle; Nuclear transplantation; Reprogramming.

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