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Title 

Resurrection of an alpha-1,3-galactosyltransferase gene-targeted miniature pig by recloning using postmortem ear skin fibroblasts

Authors 

K S AhnY J KimM KimB H LeeS Y HeoM J KangYong-Kook KangJeong Woong LeeK K LeeJ H KimW G NhoS S HwangJ S WooJ K ParkS B ParkH Shim

Issue Date 

2011

Citation 

Theriogenology, vol. 75, no. 5, pp. 933-939

Keywords 

Alpha-1,3-galactosyltransferaseGene targetingMiniature pigNuclear transferRecloning

Abstract 

Animals with a targeted disruption of genes can be produced by somatic cell nuclear transfer (SCNT). However, difficulties in clonal selection of somatic cells with a targeted mutation often result in heterogeneous nuclear donor cells, including gene-targeted and non-targeted cells, and impose a risk of producing undesired wildtype cloned animals after SCNT. In addition, the efficiency of cloning by SCNT has remained extremely low. Most cloned embryos die in utero, and the few that develop to term show a high incidence of postnatal death and abnormalities. In the present study, resurrection of an alpha-1,3-galactosyltransferase (αGT) gene-targeted miniature pig by recloning using postmortem ear skin fibroblasts was attempted. Three cloned piglets were produced from the first round of SCNT, including one stillborn and two who died immediately after birth due to respiratory distress syndrome and cardiac dysfunction. Among the three piglets, two were confirmed to be αGT gene-targeted. Fibroblasts derived from postmortem ear skin biopsies were used as nuclear donor cells for the second round of SCNT, and a piglet was produced. As expected, PCR and Southern analyses confirmed that the piglet produced from recloning was αGT gene-targeted. Currently, the piglet is fourteen months of age, and no overt health problems have been observed. Results from the present study demonstrate that loss of an invaluable animal, such as a gene-targeted miniature pig, may be rescued by recloning, with assurance of the desired genetic modification.

ISSN 

0093-691X

Link 

http://dx.doi.org/10.1016/j.theriogenology.2010.11.001

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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