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  • Title: Plasma and atrial levels of atrial natriuretic peptide (ANP) in pulmonary hypertensive rats.
    Author: Akimoto K, Miyata A, Hayakawa K, Kangawa K, Matsuo H.
    Journal: Life Sci; 1988; 43(14):1125-32. PubMed ID: 2971849.
    Abstract:
    Immunoreactive atrial natriuretic peptide (IR-ANP) was measured in plasma and atrium of normal and monocrotaline induced pulmonary hypertensive rats (PH rats). In these animals, there was right ventricular hypertrophy and right ventricular systolic pressure was elevated. Fourteen days after a single dose of monocrotaline (40 mg/kg), plasma IR-ANP concentrations were significantly elevated (964.3 +/- 63.0 pg/ml vs. 521.0 +/- 81.9 pg/ml in controls, p less than 0.001). Tissue levels of IR-ANP in the right atrium in PH rats was significantly lower than those in the controls (45.1 +/- 3.9 ng/mg vs. 240.5 +/- 10.4 ng/mg, p less than 0.001), while there was no significant difference in tissue levels of atrial IR-ANP in the left atrium between the two groups. Thus, development of pulmonary hypertension led to an increase in release of ANP from the right atrium.
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