Biochemical transmethylation of lipids and neuropeptidergic stimulation of pituitary hormone secretion

Chandan Prasad, Masatomo Mori, George H. Greeley, Ruth M. Edwards, John F. Wilber, Joyce Pegues

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    8 Scopus citations

    Abstract

    S-adenosyl-l-methionine-dependent methylation of membrane phosphatidylethanolamine to phosphatidylcholine has been shown to exist in a number of tissues including pituitary gland and to play important roles in receptor-mediated functions. The possible role of this phospholipid methylation reaction in pituitary hormone secretion has been studied. To this end, the ability of thyrotropin-releasing hormone (TRH) to release thyrotropin (TSH) and prolactin and the ability of luteinizing hormone-releasing hormone (LH-RH) to release luteinizing hormone (LH) were evaluated after inhibition of pituitary phospholipid methylation. Both TRH and LH-RH stimulated the release of their corresponding pituitary hormone in a dose-dependent manner and this stimulatory effect was inhibited in the presence of phospholipid methylation inhibitors. Non-specific stimulation of TSH release by 55 mM KCl or 0.1 mM veratridine, however, was not affected by the methylation inhibitors. The data suggest that phospholipid methylation may participate in receptor-mediated release of pituitary hormones.

    Original languageEnglish (US)
    Pages (from-to)41-46
    Number of pages6
    JournalBrain Research
    Volume334
    Issue number1
    DOIs
    StatePublished - May 13 1985

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    Keywords

    • LH secretion
    • luteinizing hormone-releasing hormone
    • phospholipid methylation
    • prolactin secretion
    • thyrotropin secretion
    • thyrotropin-releasing hormone

    ASJC Scopus subject areas

    • Developmental Biology
    • Molecular Biology
    • Clinical Neurology
    • Neuroscience(all)

    Cite this

    Prasad, C., Mori, M., Greeley, G. H., Edwards, R. M., Wilber, J. F., & Pegues, J. (1985). Biochemical transmethylation of lipids and neuropeptidergic stimulation of pituitary hormone secretion. Brain Research, 334(1), 41-46. https://doi.org/10.1016/0006-8993(85)90565-7