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Título : The use of recombinant gilthead sea bream (Sparus aurata) growth hormone for radioiodination and standard preparation in radioimmunoassay
Autor : Martínez-Barberá, Juan P.; Pendón, Carlos; Martí-Palanca, Hilario; Calduch-Giner, Josep A. ; Rodríguez Martínez, Ramón B.; Valdivia, Manuel M.; Pérez-Sánchez, Jaume
Palabras clave : Radioimmunoassay
Rabbit antiserum
Recombinant growth hormone
Gilthead seabream
Sparus aurata
Growth hormone
Teleost
Fish
Fecha de publicación : abr-1995
Editor: Elsevier
Citación : Comp. Biochem. Physiol. 110A: 335-340 (1995).
Resumen: A gilthead sea bream growth hormone (sbGH) obtained by cloning and expression of sbGH cDNA was used to develop a sensitive and specific radioimmunoassay (RIA). Iodination of recombinant sbGH (rsbGH) was performed by the classical Chloramine-T method. Specific antiserum, raised in rabbits, was added in a final dilution of 1/36,000. The minimum detectable dose was 30 pg, and the midrange of the assay (ED50) was 275 pg. Intra- and inter-assay coefficients of variation (CV) were 3.3 and 5.8% at ED50 levels. Human GH (hGH), ovine GH (oGH), carp gonadotropin (cGtH), chinook salmon gonadotropin (sGtH), ovine prolactin (oPRL) and recombinant tilapia prolactin (rtiPRL) did not show cross-reactivity. Serial dilutions of chinook salmon GH (sGH) and recombinant rainbow trout GH (rtGH) showed a low but significant cross-reactivity. A good parallelism between rsbGH standard and serial dilutions of native sbGH, plasma and pituitary extracts was observed. In addition, when plasma and pituitary samples were analyzed for GH quantification, non-significant differences were observed within this and previous RIA for native sbGH. Therefore, it appears conclusive that our rsbGH can be used successfully as a standard and radioiodinated hormone in GH assays for gilthead sea bream, which is extensively cultured in the Mediterranean area.
Descripción : 6 pages.
Versión del editor: http://dx.doi.org/10.1016/0300-9629(94)00178-V
URI : http://hdl.handle.net/10261/6328
DOI: 10.1016/0300-9629(94)00178-V
ISSN: 0300-9629
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