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Neuropeptides in cardiovascular control.

W F Ganong

    Journal of Hypertension. Supplement : Official Journal of the International Society of Hypertension
    |December 1, 1984
    PubMed
    Summary
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    Neuropeptides like vasoactive intestinal peptide (VIP) influence cardiovascular function by acting as neurotransmitters and hormones. VIP dilates blood vessels and stimulates renin secretion, playing a key role in blood pressure regulation.

    Area of Science:

    • Cardiovascular Physiology
    • Neuroendocrinology

    Background:

    • Neuropeptides play diverse roles in cardiovascular regulation.
    • They function as cotransmitters in the autonomic nervous system and as circulating hormones.
    • Examples include vasoactive intestinal peptide (VIP), neuropeptide Y, substance P, vasopressin, and angiotensin II.

    Purpose of the Study:

    • To explore the multifaceted roles of neuropeptides in cardiovascular function.
    • To investigate the specific cardiovascular effects of vasoactive intestinal peptide (VIP), including its role in renin secretion.

    Main Methods:

    • Review of neuropeptide functions in the autonomic nervous system, central nervous system, and as circulating hormones.
    • Analysis of studies on the effects of exogenous vasopressin and VIP on blood pressure and cardiac output.

    Related Experiment Videos

  • Investigation of VIP's direct action on juxtaglomerular cells and its stimulation of renin secretion, including effects of neostigmine.

    • Main Results:

    • Neuropeptides act as cotransmitters (e.g., VIP with acetylcholine) and hormones (e.g., vasopressin, angiotensin II).
    • Circulating vasopressin is crucial for maintaining blood pressure in hypovolemic states.
    • Vasoactive intestinal peptide (VIP) directly stimulates renin secretion from juxtaglomerular cells, with elevated plasma VIP levels observed in various conditions.

    Conclusions:

    • Neuropeptides are integral to cardiovascular control through neural and hormonal pathways.
    • VIP is identified as a potentially significant renin-stimulating hormone, influencing cardiovascular homeostasis.
    • Understanding neuropeptide actions is vital for comprehending cardiovascular regulation and potential therapeutic targets.