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  • Title: Increased synthesis of prolactin and growth hormone during incubation in the pituitary of broody Nagoya hens.
    Author: Hoshino S, Wakita M.
    Journal: Horm Metab Res; 1989 Sep; 21(9):480-2. PubMed ID: 2583672.
    Abstract:
    Synthesis and release rates of prolactin and growth hormone (GH) in the anterior pituitary of laying and incubating broody chickens (Nagoya breed) were determined by a disc electrophoretic technique after in vitro incubation of anterior pituitaries with a labeled amino acid. Prolactin synthesis and release were two-fold higher in incubating than in laying hens, resulting in twofold increase in the concentration of prolactin in the gland. GH synthesis was three-fold higher in incubating than in laying hens but GH release was not affected by the incubation. GH concentration in the pituitary gland also increased in incubating hens. It is suggested that these changes in hormone synthesis, release, and concentrations are related to nesting behaviour and nutritional condition of incubating hens.
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