Immunological identity of human and porcine growth hormones. Application to determination of growth hormone in porcine serum.

Abstract

In two radioimmunoassay systems with iodinated human growth hormone as tracer and anti-human growth hormone or anti-porcine growth hormone as binding site, the standard curves for human and for porcine growth hormone were parallel. In both systems the porcine growth hormone preparation had to be added in about the same excess as compared to the human hormone. It was concluded that the human and the porcine hormones behave in an identical way and that the values obtained in radioimmunoassay for human growth hormone represent the amount of immunologically active molecules in the porcine growth hormone preparation. As parallel standard curves were obtained with porcine serum, the concentration of growth hormone is porcine serum may be determined by radioimmunoassay for human growth hormone.