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  • Title: ANG II-induced attenuation of duck salt gland secretion does not depend upon the release of adrenal catecholamines.
    Author: Butler DG, Lam W, Tong J.
    Journal: J Comp Physiol B; 2006 Jan; 176(1):35-43. PubMed ID: 16292650.
    Abstract:
    Pekin ducks (Anas platyrhynchos) were bilaterally adrenalectomized (ADX) using a two-stage procedure and given daily i.m. injections of 1 mg kg bw(-1) of dexamethasone (DEXA), a steroid lacking mineralocorticoid activity, and 0.9% saline drinking water ad libitum to counterbalance renal losses of salt and water. Mean arterial blood pressure (mmHg) fell from 161+/- 3.7 (intact controls) to 116 +/- 6.9 (bilateral ADX+DEXA), a decrease of 27%, but heart rates (HR) were unchanged. The nasal salt glands were fully active after ADX + DEXA. Rates of fluid secretion and electrolyte and osmolal concentrations were unchanged. Secretion stopped, then rebounded several minutes later if ADX + DEXA ducks were injected i.v. with 1 microg of [Asn(1),Val(5)]-angiotensin II (ANG II) kg bw(-1) which showed that attenuation was not adrenal catecholamine-dependent.
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