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Plasma adrenomedullin concentrations in patients with renovascular or malignant hypertension

C Caliumi1, R Cianci, M Celi

  • 1Department of Clinical Sciences, University of Rome La Sapienza, Rome, Italy.

Minerva Cardioangiologica
|July 31, 2004
PubMed
Abstract

Insights

Plasma adrenomedullin (AM) levels increase with arterial hypertension severity. Elevated AM in malignant (MHT) and renovascular hypertension (RVH) suggests renin-angiotensin system (RAS) activation contributes to higher AM levels.

Area of Science:

  • Cardiovascular Research
  • Endocrinology
  • Hypertension Studies

Background:

  • Adrenomedullin (AM) is a hypotensive peptide.
  • Malignant (MHT) and renovascular hypertension (RVH) involve renin-angiotensin system (RAS) activation.
  • Investigating AM behavior in hypertension is crucial.

Purpose of the Study:

  • To investigate plasma AM levels in MHT and RVH patients.
  • To compare AM levels with essential hypertensive patients (EHT) and normotensive subjects (NS).
  • To explore the relationship between RAS activation and AM levels.

Main Methods:

  • Studied 4 MHT, 10 RVH, 24 EHT patients, and 21 NS.
  • Collected 10 ml venous blood samples.
  • Measured plasma AM using radioimmunoassay; measured plasma renin activity (PRA).

Main Results:

  • Plasma renin activity (PRA) was significantly higher in RVH and MHT patients.
  • Plasma AM levels were significantly elevated in EHT and RVH compared to NS.
  • Plasma AM levels were highest in MHT patients and decreased after treatment.

Conclusions:

  • Plasma AM concentrations increase proportionally with arterial hypertension severity.
  • RAS activation in MHT and RVH patients may contribute to elevated plasma AM levels.
  • Findings highlight AM as a potential biomarker in hypertensive conditions.

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