J Korean Soc Endocrinol.  1998 Mar;13(1):67-76.

Renin Release by Adenosine Agosists and Antagonists in Two-Kidney One Clip Goldblatt Hypertensive Rats

• Choi YJ
• Kim SH
• Cho KW
• Huh J
• Seol KH

Abstract

BACKGROUND: In two-kidney one clip Goldbaltt hypertensive rats(2K1C GHR), clipped kidney may be exposed to low pressure and unclipped kidney to high pressure. In addition, both kidneys may have a different amount of adenosine which is increased by ischemia and plays an important role for renin release. The aim of this study was to invstigate the responsmiveness for renin release to adenosine agonists and antagonist in clipped and unclipped kidney of 2K1C GHR.
METHODS
Emplying kidney slices from both unclipped and unclipped kidney of 2K1C GHR, the alteration by adenosine agonists and antagonist of renin release was studied.
RESULTS
The renal renin content and basal renin release from unclipped kidney slices were suppressed, whereas those from clipped kidney were augmented Adenosine Al receptor agonist, cyclohexyladenosne(CHA), phenylisopropyl adenosine(PIA) and adenosine caused a decrease in renin release from clipped kidney slices. Adenosine A2 receptor agonist, NECA, and nonspecific adenosine receptor aganist, 2-chloroadenosine(CA) caused an increase in renin release from clipped kidney slices. Adenosine receptor antagonist, 8-phenyltheophylline(8-PT) caused an increase in renin release from clipped kidney slices. In unclipped kidney, however, the renin release in response to NECA, CA or 8-PT was reversed and the decreasing effect of renin release to CHA and adenosine was slightly inereased.
CONCLUSION
These results suggest that the responsiveness of adenosine receptors, which may participate in renin release is modified in clipped and unclipped kidney of 2K1C GHR.

MeSH Terms

Adenosine*
Adenosine-5'-(N-ethylcarboxamide)
Animals
Hypertension, Renovascular
Ischemia
Kidney
Rats*
Receptors, Adenosine A2
Receptors, Purinergic P1
Renin*
Adenosine
Adenosine-5'-(N-ethylcarboxamide)
Receptors, Adenosine A2
Receptors, Purinergic P1
Renin