Altered Phospholipase Activities Related to α1-Adrenergic Receptor Supersensitivity of Aortas from Aldosterone-Salt Hypertensive Rats

  • Allan W. Jones
  • Shivendra D. Shukla
  • Brinda B. Geisbuhler
  • Susan B. Jones
  • Jacquelyn M. Smith
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 308)


Vascular smooth muscle from several hypertensive models exhibits supersensitivity to catecholamines, which precedes the development of overt hypertension in rats given mineralocorticoid-salt treatment (1–5). In previous studies we did not find significant changes in αl-receptor characteristics (receptor type, dissociation constant or maximal receptor binding) in aorta from aldosterone-salt hypertensive rats (AHR) (6,7). Since we observed a 2–15 fold leftward shift in the NE EC50 (concentration of norepinephrine required for 50% response) for functional responses in AHR, we concluded that increased efficacy of post receptor events occurs in AHR (7,8).


Phosphatidic Acid Phosphatidic Acid Receptor Occupancy Inositol Phosphate PLA2 Activity 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Allan W. Jones
    • 1
  • Shivendra D. Shukla
    • 1
  • Brinda B. Geisbuhler
    • 1
  • Susan B. Jones
    • 1
  • Jacquelyn M. Smith
    • 1
  1. 1.Departments of Physiology and PharmacologyUniversity of MissouriColumbiaUSA

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