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Transposition response in different hypertensive rats

T Tada, Y Teranishi, J Iriuchijima

    The Japanese Journal of Physiology
    |January 1, 1981
    PubMed
    Summary
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    The transposition response, a habitat change reaction in rats, is typically isopressor. However, in most hypertensive rat models, it becomes a pressor response, elevating arterial pressure.

    Area of Science:

    • Cardiovascular physiology
    • Animal models of hypertension

    Background:

    • The transposition response is a complex cardiovascular reaction to habitat change in rats.
    • In normal rats, this response is typically isopressor, meaning arterial pressure does not significantly change.

    Purpose of the Study:

    • To investigate whether the transposition response remains isopressor in various experimental models of hypertension.
    • To determine if different types of experimental hypertension alter the cardiovascular response to habitat change.

    Main Methods:

    • Testing the transposition response in spontaneously hypertensive rats, DOCA salt hypertensive rats, neurogenic hypertensive rats, and renovascular hypertensive rats.
    • Monitoring arterial pressure changes during the transposition response in these different hypertensive models.

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    Main Results:

    • The transposition response was found to be a pressor response (elevating arterial pressure) in spontaneously hypertensive rats, DOCA salt hypertensive rats, and neurogenic hypertensive rats.
    • In contrast, renovascular hypertensive rats exhibited an isopressor response to transposition.

    Conclusions:

    • The nature of the transposition response is significantly influenced by the type of experimental hypertension in rats.
    • Renovascular hypertension appears to preserve the isopressor characteristic of the transposition response, unlike other hypertensive models tested.