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Essential hypertension: central and peripheral norepinephrine

C R Lake, H G Gullner, R J Polinsky

    Science (New York, N.Y.)
    |February 27, 1981
    PubMed
    Summary
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    Patients with essential hypertension show higher norepinephrine in cerebrospinal fluid but normal plasma levels. This suggests central nervous system noradrenergic hyperactivity, not peripheral sympathetic nervous system dysfunction, in this condition.

    Area of Science:

    • Neuroscience
    • Cardiovascular Medicine
    • Hypertension Research

    Background:

    • Essential hypertension is a complex condition with multifactorial origins.
    • The role of the sympathetic nervous system in hypertension is under investigation.
    • Norepinephrine is a key neurotransmitter in sympathetic nervous system function.

    Purpose of the Study:

    • To investigate the central and peripheral levels of norepinephrine in patients with essential hypertension.
    • To determine if central noradrenergic hyperactivity is present in essential hypertension.
    • To assess the functional status of the peripheral sympathetic nervous system in essential hypertension.

    Main Methods:

    • Cerebrospinal fluid and plasma samples were collected from patients with essential hypertension and healthy controls.

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  • Norepinephrine concentrations in both sample types were measured using established biochemical assays.

    • Main Results:

    • Norepinephrine concentrations were significantly elevated in the cerebrospinal fluid of hypertensive patients compared to controls.
    • Plasma norepinephrine concentrations did not differ between hypertensive patients and healthy controls.
    • These findings suggest a dissociation between central and peripheral norepinephrine levels.

    Conclusions:

    • Essential hypertension may be characterized by central nervous system noradrenergic hyperactivity.
    • Peripheral sympathetic nervous system function appears to be normal in patients with essential hypertension.
    • These results highlight the importance of central mechanisms in the pathophysiology of essential hypertension.