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Journal ArticleDOI

Production of cloned pigs from in vitro systems.

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TLDR
The cell culture and nuclear transfer techniques described here should allow the use of genetic modification procedures to produce tissues and organs from cloned pigs with reduced immunogenicity for use in xenotransplantation.
Abstract
Here we describe a procedure for cloning pigs by the use of in vitro culture systems. Four healthy male piglets from two litters were born following nuclear transfer of cultured somatic cells and subsequent embryo transfer. The initiation of five additional pregnancies demonstrates the reproducibility of this procedure. Its important features include extended in vitro culture of fetal cells preceding nuclear transfer, as well as in vitro maturation and activation of oocytes and in vitro embryo culture. The cell culture and nuclear transfer techniques described here should allow the use of genetic modification procedures to produce tissues and organs from cloned pigs with reduced immunogenicity for use in xenotransplantation.

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Journal ArticleDOI

Production of α-1,3-Galactosyltransferase Knockout Pigs by Nuclear Transfer Cloning

TL;DR: The production of four live pigs in which one allele of the α-1,3-galactosyltransferase locus has been knocked out is reported, paving the way for xenotransplantation of pigs from clonal fetal fibroblast cell lines.
Journal ArticleDOI

Production of α-1,3-galactosyltransferase null pigs by means of nuclear transfer with fibroblasts bearing loss of heterozygosity mutations

TL;DR: An unexpectedly high rate of spontaneous loss of GGTA1 function was observed, with the vast majority of null cells resulting from loss of the WT allele, and congenital abnormalities observed in the heterozygous NT animals did not reappear in the serially produced null animals.
Journal ArticleDOI

The use of pigs in neuroscience: modeling brain disorders.

TL;DR: The present paper focuses on evaluating the potential for modeling symptoms, phenomena or constructs of human brain diseases in pigs, the neuropsychiatric disorders in particular.
Journal ArticleDOI

Successful Piglet Production after Transfer of Blastocysts Produced by a Modified In Vitro System

TL;DR: The results suggest that an excellent piglet production system can be established by using this modified IVP system, which produces high-quality porcine blastocysts and has advantages for the generation of cloned and transgenic pigs.
Journal ArticleDOI

Germ Cell Transplantation in Pigs

TL;DR: Results indicate that germ cell transplantation is feasible in immature pigs, and that porcine transplanted cells are retained in the recipient testis for at least 1 mo, a first step toward successful spermatogonial transplantation in a farm animal species.
References
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Journal ArticleDOI

Viable offspring derived from fetal and adult mammalian cells

TL;DR: The birth of lambs from differentiated fetal and adult cells confirms that differentiation of that cell did not involve the irreversible modification of genetic material required for development to term and reinforces previous speculation that by inducing donor cells to become quiescent it will be possible to obtain normal development from a wide variety of differentiated cells.
Journal ArticleDOI

Full-term development of mice from enucleated oocytes injected with cumulus cell nuclei

TL;DR: These experiments show that for mammals, nuclei from terminally differentiated, adult somatic cells of known phenotype introduced into enucleated oocytes are capable of supporting full development.
Journal ArticleDOI

Sheep cloned by nuclear transfer from a cultured cell line

TL;DR: This is the first report, to the authors' knowledge, of live mammalian offspring following nuclear transfer from an established cell line, and will provide the same powerful opportunities for analysis and modification of gene function in livestock species that are available in the mouse through the use of embryonic stem cells.
Journal ArticleDOI

Cloned transgenic calves produced from nonquiescent fetal fibroblasts

TL;DR: The life-span of near senescent fibroblasts could be extended by nuclear transfer, as indicated by population doublings in fibroblast lines derived from a 40-day-old fetal clone.
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