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1 Centre for Nephrology,
P2 receptors have been identified in rat kidney by
autoradiography, using the radioligand
[3H]
,
-methylene
ATP, and by immunohistochemistry, using a polyclonal antibody to the
P2X1 purinoceptor. They have been
localized to the vascular smooth muscle of intrarenal arteries,
including arcuate and interlobular arteries, and afferent arterioles,
but not glomeruli, postglomerular efferent arterioles, or renal
tubules. We conclude that at least some of the P2 receptors present on
vascular smooth muscle are of the
P2X1 subtype. The functional
significance of these findings in the vascular control of the kidney is
discussed.
immunohistochemistry; adenosine 5'-triphosphate
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