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- W2010258431 abstract "An efficient and low-cost production of transgenic pigs has significant applications to the pig industry and biomedical science. Generation of transgenic pig by sperm-mediated gene transfer (SMGT) was inexpensive and convenient, and reported with high efficiency. To test the method of SMGT in pigs, we employed deep post-cervical intrauterine insemination of incubated spermatozoa in this study. A test of sperm motility of semen from nine Landrace boars after incubation with radioactively labeled DNA construct indicated that DNA uptake of the sperm was highly correlated with sperm motility at the time of collection. DNA concentration of 50 and 300 µg per one billion sperm was incubated with washed high-motility sperm at 17°C for 2 hr. Twenty one hybrid gilts and sows of Meishan crossed with Large White were inseminated with transgene-incubated sperm and produced 156 piglets. Transgene DNA sequences were identified in 31 piglets by PCR amplification of genomic DNA isolated from piglet ears at the age of 3 days. The deep intrauterine insemination had a higher rate of positive transgenic piglets than regular insemination (29.6% of 98 piglets vs. 3.4% of 58 piglets). However, the exogenous transgene DNA was not detected in any piglets at the age of 70–100 days. Therefore, the results further demonstrated that transgene through incubation with spermatozoa was mostly transiently transmitted to the offspring at early growing stage and lost in adulthood, which may result from episomal DNA replications during cell divisions only at the early stage of development. Mol. Reprod. Dev. 75: 26–32, 2008. © 2007 Wiley-Liss, Inc." @default.
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- W2010258431 date "2007-01-01" @default.
- W2010258431 modified "2023-09-25" @default.
- W2010258431 title "Transient transgene transmission to piglets by intrauterine insemination of spermatozoa incubated with DNA fragments" @default.
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- W2010258431 doi "https://doi.org/10.1002/mrd.20778" @default.
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