Quantitative determination of recombinant bovine somatotropin in commercial shrimp feed using a competitive enzyme-linked immunosorbent assay

Journal of Agricultural and Food Chemistry
James L Munro, Virginia A Boon

Abstract

Recombinant bovine somatotropin (rbST), also known as growth hormone, is used to enhance production and development of animals within the agriculture and aquaculture industries. Its use is controversial because of its potential effects on human and animal health. To screen for rbST in shrimp feed, a competitive enzyme-linked immunosorbent assay (ELISA) with an inhibition step was developed. Sample and rbST antibody (rabbit anti-rbST) were incubated at room temperature for 30 min. Subsequently, this competitive reaction was transferred to a microplate coated with rbST, using goat antirabbit IgG linked with horseradish peroxidise as the secondary antibody. Substrates for peroxidise were added, and the absorbance at 410 nm was determined. The applicability of the method was assessed using rbST extracted from "spiked" shrimp feed samples. The assay was reproducible and linear with R(2) values greater than 0.98 over the standard curve range of 20-500 microg/g. The intra- and interday precisions expressed as relative standard deviations were 3.4 and 5.3%, respectively. The mean recovery from 15 spiked feed samples was 105%. This assay will be a valuable tool for quantitative detection of rbST by both governments and commercial compan...Continue Reading

References

Nov 1, 1992·General and Comparative Endocrinology·E S GrayH A Bern
Dec 1, 1992·Journal of Dairy Science·D E Bauman
Dec 1, 1990·Analytical Biochemistry·E Fernández, J J Kopchick
Jun 25, 1986·Journal of Chromatography·P A HartmanJ G Hoogerheide
Sep 19, 2006·The Journal of Dairy Research·Lorenzo CastigliegoAlessandra Guidi

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