Publication Date:
1990-08-24
Description:
Scientists in the Food and Drug Administration (FDA), after reviewing the scientific literature and evaluating studies conducted by pharmaceutical companies, have concluded that the use of recombinant bovine growth hormone (rbGH) in dairy cattle presents no increased health risk to consumers. Bovine GH is not biologically active in humans, and oral toxicity studies have demonstrated that rbGH is not orally active in rats, a species responsive to parenterally administered bGH. Recombinant bGH treatment produces an increase in the concentration of insulin-like growth factor-I (IGF-I) in cow's milk. However, oral toxicity studies have shown that bovine IGF-I lacks oral activity in rats. Additionally, the concentration of IGF-I in milk of rbGH-treated cows is within the normal physiological range found in human breast milk, and IGF-I is denatured under conditions used to process cow's milk for infant formula. On the basis of estimates of the amount of protein absorbed intact in humans and the concentration of IGF-I in cow's milk during rbGH treatment, biologically significant levels of intact IGF-I would not be absorbed.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Juskevich, J C -- Guyer, C G -- New York, N.Y. -- Science. 1990 Aug 24;249(4971):875-84.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Food and Drug Administration, Center for Veterinary Medicine, Office of New Animal Drug Evaluation, Rockville, MD 20857.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/2203142" target="_blank"〉PubMed〈/a〉
Keywords:
Animals
;
Cattle
;
Food/*standards
;
Growth Hormone/pharmacology/physiology/*standards
;
Humans
;
Insulin-Like Growth Factor I/physiology
;
Recombinant Proteins/standards
;
United States
;
United States Food and Drug Administration
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
