Publication Date:
1989-06-16
Description:
Genetic engineering of livestock is expected to have a major effect on the agricultural industry. However, accurate assessment of the consequences of transgene expression is impossible without multigenerational studies. A systematic study of the beneficial and adverse consequences of long-term elevations in the plasma levels of bovine growth hormone (bGH) was conducted on two lines of transgenic pigs. Two successive generations of pigs expressing the bGH gene showed significant improvements in both daily weight gain and feed efficiency and exhibited changes in carcass composition that included a marked reduction in subcutaneous fat. However, long-term elevation of bGH was generally detrimental to health: the pigs had a high incidence of gastric ulcers, arthritis, cardiomegaly, dermatitis, and renal disease. The ability to produce pigs exhibiting only the beneficial, growth-promoting effects of growth hormone by a transgenic approach may require better control of transgene expression, a different genetic background, or a modified husbandry regimen.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pursel, V G -- Pinkert, C A -- Miller, K F -- Bolt, D J -- Campbell, R G -- Palmiter, R D -- Brinster, R L -- Hammer, R E -- HD-09172/HD/NICHD NIH HHS/ -- HD-19018/HD/NICHD NIH HHS/ -- New York, N.Y. -- Science. 1989 Jun 16;244(4910):1281-8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉U.S. Department of Agriculture, Beltsville, MD 20705.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2499927" target="_blank"〉PubMed〈/a〉
Keywords:
Agriculture
;
Animals
;
Animals, Domestic/*genetics/growth & development
;
*Animals, Genetically Modified
;
Body Weight
;
Female
;
*Genetic Engineering
;
Growth Hormone/genetics
;
Growth Hormone-Releasing Hormone/genetics
;
Insulin-Like Growth Factor I/genetics
;
Mice
;
Organ Size
;
Swine/genetics/growth & development
;
*Transfection
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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