Transmission of bovine β-casein/human lactoferrin fusion gene in transgenic cattle

Cited 0 time in scopus
Metadata Downloads
Title
Transmission of bovine β-casein/human lactoferrin fusion gene in transgenic cattle
Author(s)
Yong Mahn Han; Deog Bon Koo; Jung Sun Park; Y H Kim; K J Lee; Kyung Kwang Lee
Bibliographic Citation
Reproductive & Developmental Biology, vol. 29, no. 4, pp. 235-239
Publication Year
2005
Abstract
This study was conducted to test whether the transgenic cattle pass the transgene to their progeny through germ cells, and whether the transgene is expressed in the mammary gland of ransgenic cows. Two male ransgenic calves were born from IVF-derived embryos injected with bovine β-casein/human lactoferrin fusion gene and then grew up to be reproducible. Semen was collected from a transgenic bull after 18 mon of age and then frozen. Bovine oocytes matured in vitro were fertilized with spermatozoa of the transgenic bull and cultured in 50㎕ drops of CRlaa medium supplemented with 3 mg/mL BSA. After 48 h of culture, cleaved embryos were determined for the presence of transgenes by DNA polymerase chain reaction (PCR). Proportion of transgene positives among bovine embryos fertilized with sperm of the transgenic bull was 20.9% (28/134). One of transgenic bulls did not produce transgenic sperm. Out of 34 calves produced from recipient heifers inseminated with semen of the other bull, 3 (8.8%) were transgenic animals (2 females and 1 male). Thus, one transgenic bull showed a low transmission frequency below Mendelian levels in both the IVF-derived embryos and his progeny. It was demonstrated by Southern blot that copy numbers of the transgene in the transgenic progeny enhanced about 1.8 times as compared to those of the founder bull The results demonstrate that the transgenic bull carrying human lactoferrin gene could pass his transgene to the progeny through germ cells, although he is a germ-line mosaic.
Keyword
transgeniccattlemosaictransmission
ISSN
I000-0006
Publisher
Korea Soc-Assoc-Inst
Type
Article
Appears in Collections:
Aging Convergence Research Center > 1. Journal Articles
Files in This Item:
  • There are no files associated with this item.


Items in OpenAccess@KRIBB are protected by copyright, with all rights reserved, unless otherwise indicated.