[The relationship between hereditary characteristics in the blood (Phi-PO2-Pgd) and susceptibility to stress in swine. A pilot study].

Deaths during transport and the incidence of a poor quality of the meat in pigs were the most important reasons for studying the stress-syndrome (MHS) during the past twenty years. MHS is controlled by an autosomal Hal locus with two alleles N and n. Only pigs of genotype nn are sensitive to halothane and susceptible to stress.

Regulation of MSH release from the neurointermediate lobe of Xenopus laevis by CRF-like peptides.

Immunocytochemical studies showed the presence of a fiber system containing a CRF-like peptide in the median eminence and in the neural lobe of the pituitary gland of Xenopus laevis. During in vitro superfusion of neurointermediate lobe tissue, CRF, sauvagine and urotensin I induced a rapid and dose-dependent stimulation of secretion of MSH and endorphin. Tissue of white-background adapted animals displayed a remarkably higher sensitivity to CRF and sauvagine than tissue from animals that were adapted to a black background.