Binding sites for atrial natriuretic factor (ANF) in brain: alterations in Brattleboro rats
Binding sites for atrial natriuretic factor (ANF-28) were analyzed in discrete brain areas of Brattleboro rats with hereditary diabetes insipidus and Long-Evans (LE) controls by quantitative autoradiography. The maximum binding capacity (Bmax) and affinity constant (Ka) for /sup 125/I-ANF-28 were elevated significantly in the subfornical organ of Brattleboro rats compared to matched LE controls. In contrast, values for Bmax and Ka for /sup 125/I-ANF-28 binding in choroid plexus and area postrema were similar for rats of the two strains. These findings are consistent with a selective upregulation of ANF-28 binding sites in the subfornical organ of Brattleboro rats which exhibit a profound disturbance in body fluid homeostasis. These alterations in ANF-28 binding sites in the subfornical organ may represent a compensatory response to the absence of vasopressin in the Brattleboro rat.
- Research Organization:
- Univ. of Virginia, Charlottesville
- OSTI ID:
- 6647209
- Journal Information:
- Brain Res. Bull.; (United States), Vol. 6
- Country of Publication:
- United States
- Language:
- English
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551001* - Physiological Systems- Tracer Techniques