Bovine pineal glands were separated into stalk and parenchymal portions and extracted separately for both pineal antigonadotropic and neurohypophysial activities. Bioassay of these extracts localized neurohypophysial hormone activity to the stalk and antigonadotropic activity to the pineal parenchyma. Destalked rat pineals were devoid of neurohypophysial hormone activity at the concentrations employed. Whereas the injection of purified extracts containing pineal antigonadotropin reduced ventral prostate weights in mice, vasotocin was without such actions. these results fail to support pineal (parenchymal) localization of vasotocin and a reproductive role for this neurohypophysial peptide.
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Pharmacology, Toxicology and Pharmaceutics(all)