| Efficient production of transgenic cloned calves using preimplantation screening. | |
MedLine Citation:
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PMID: 12390880 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The genetic manipulation of donor cells before nuclear transfer (NT) enables prior selection for transgene integration. However, selection for genetically modified cells using antibiotic drugs often results in mixed populations, resulting in a mixture of transgenic and nontransgenic donor cells for NT. In this study, we attempted to develop efficient strategies for the generation of human bile salt-stimulated lipase (BSSL) transgenic cows. Preimplantation screening by either biopsy or green fluorescent protein (GFP) expression was used to detect NT-derived BSSL transgenic embryos to ensure that the calf born would be transgenic. We compared the development rates of NT-derived embryos from G418- and GFP-selected donor cells. There were no significant differences (P < 0.001) in cleavage rate (67.2% vs. 60.0%) and blastocyst formation rate (44.9% vs. 41.2%). We also compared the pregnancy rates of the G418/biopsy and GFP preimplantation screened NT-derived blastocysts. The Day 40 pregnancy rate of the G418/biopsy group (40%) was lower than that of the GFP group (57%), but the calf birth rate of the G418/biopsy group (40%) was higher than that of the GFP group (21%). Healthy BSSL transgenic calves were born after both screening processes. This is the first report of biopsy-screened cloned transgenic animals. The results suggest that both selection methods are useful for detecting transgenic NT embryos without negatively affecting their development into viable transgenic offspring. |
Authors:
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Shu-Hung Chen; Todd D Vaught; Jeff A Monahan; Jeremy Boone; Elizabeth Emslie; Peter M Jobst; Ashley E Lamborn; Angelika Schnieke; Laura Robertson; Alan Colman; Yifan Dai; Irina A Polejaeva; David L Ayares |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biology of reproduction Volume: 67 ISSN: 0006-3363 ISO Abbreviation: Biol. Reprod. Publication Date: 2002 Nov |
Date Detail:
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Created Date: 2002-10-22 Completed Date: 2003-05-21 Revised Date: 2009-11-19 |
Medline Journal Info:
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Nlm Unique ID: 0207224 Medline TA: Biol Reprod Country: United States |
Other Details:
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Languages: eng Pagination: 1488-92 Citation Subset: IM |
Affiliation:
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PPL Therapeutics Inc., Blacksburg, Virginia 24060, USA. schen@ppl-therapeutics.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Animals, Genetically Modified* Animals, Newborn Biopsy Blastocyst / physiology* Cattle Female Gene Dosage Genes, Reporter Genetic Testing / methods* Green Fluorescent Proteins Luminescent Proteins / genetics Male Pregnancy Pregnancy Outcome Pregnancy, Animal Reproductive Techniques, Assisted Sterol Esterase / biosynthesis, genetics* Transgenes |
| Chemical | |
Reg. No./Substance:
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0/Luminescent Proteins; 147336-22-9/Green Fluorescent Proteins; EC 3.1.1.-/bile salt-stimulated lipase; EC 3.1.1.13/Sterol Esterase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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