Publication Date:
2002-12-21
Description:
The enzyme alpha1,3-galactosyltransferase (alpha1,3GT or GGTA1) synthesizes alpha1,3-galactose (alpha1,3Gal) epitopes (Galalpha1,3Galbeta1,4GlcNAc-R), which are the major xenoantigens causing hyperacute rejection in pig-to-human xenotransplantation. Complete removal of alpha1,3Gal from pig organs is the critical step toward the success of xenotransplantation. We reported earlier the targeted disruption of one allele of the alpha1,3GT gene in cloned pigs. A selection procedure based on a bacterial toxin was used to select for cells in which the second allele of the gene was knocked out. Sequencing analysis demonstrated that knockout of the second allele of the alpha1,3GT gene was caused by a T-to-G single point mutation at the second base of exon 9, which resulted in inactivation of the alpha1,3GT protein. Four healthy alpha1,3GT double-knockout female piglets were produced by three consecutive rounds of cloning. The piglets carrying a point mutation in the alpha1,3GT gene hold significant value, as they would allow production of alpha1,3Gal-deficient pigs free of antibiotic-resistance genes and thus have the potential to make a safer product for human use.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3154759/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3154759/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Phelps, Carol J -- Koike, Chihiro -- Vaught, Todd D -- Boone, Jeremy -- Wells, Kevin D -- Chen, Shu-Hung -- Ball, Suyapa -- Specht, Susan M -- Polejaeva, Irina A -- Monahan, Jeff A -- Jobst, Pete M -- Sharma, Sugandha B -- Lamborn, Ashley E -- Garst, Amy S -- Moore, Marilyn -- Demetris, Anthony J -- Rudert, William A -- Bottino, Rita -- Bertera, Suzanne -- Trucco, Massimo -- Starzl, Thomas E -- Dai, Yifan -- Ayares, David L -- DK29961/DK/NIDDK NIH HHS/ -- R01 AM007772/AM/NIADDK NIH HHS/ -- R01 DK029961-19/DK/NIDDK NIH HHS/ -- New York, N.Y. -- Science. 2003 Jan 17;299(5605):411-4. Epub 2002 Dec 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉PPL Therapeutics Inc., 1700 Kraft Drive, Blacksburg, VA 24060, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12493821" target="_blank"〉PubMed〈/a〉
Keywords:
Alleles
;
Animals
;
Bacterial Toxins/pharmacology
;
Cell Line
;
Cloning, Molecular
;
Cloning, Organism
;
DNA, Complementary
;
Embryo Transfer
;
Enterotoxins/pharmacology
;
Female
;
Fibroblasts
;
Galactosyltransferases/*deficiency/*genetics
;
*Gene Targeting
;
Genetic Vectors
;
HeLa Cells
;
Humans
;
Immunoglobulin M/blood
;
Islets of Langerhans Transplantation
;
Mice
;
Mice, Knockout
;
*Point Mutation
;
Pregnancy
;
Swine/*genetics
;
Transfection
;
Transplantation, Heterologous
;
Trisaccharides/*analysis/biosynthesis/immunology
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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