DEVELOPMENT AND APPLICATION OF A HETEROLOGOUS RADIOIMMUNOASSAY FOR OVINE FOLLICLE-STIMULATING HORMONE

Authors:
  • JMJUDITH R. McNEILLY
    JUDITH R. McNEILLY
  • AMA. S. McNEILLY
    A. S. McNEILLY
  • JWJ. S. Walton
    J. S. Walton
  • FCF. J. Cunningham
    F. J. Cunningham
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Abstract
SUMMARY: A highly specific and sensitive heterologous double antibody radioimmunoassay for ovine follicle-stimulating hormone (oFSH) is described in detail. The assay using a rabbit antiserum to human FSH and either 125I-labelled rat FSH or 125I-labelled oFSH as tracer is specific for FSH. A maximum cross-reaction (B/Bo = 50%) of 0·1% was observed with other ovine, rat or human pituitary hormones or human chorionic gonadotrophin. Serum levels of oFSH in samples collected daily throughout the oestrous cycle showed large individual variations. In five out of nine animals a peak of FSH was observed on the day of oestrus.