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Using a renal cortical slice system from sodium loaded (SL) or sodium deficient (SD) rats, this study investigated whether the effect of prostaglandin E2 (PGE2) on renin release (RR) is mediated by tissue cyclic AMP content (TcAMPc) changes, and if it can be modified by dietary sodium manipulation. At 10(-5) M, PGE2 significantly stimulated RR and TcAMPc in both SL and SD groups of slices. PGE2 doses of 10(-9) M and 10(-7) M were ineffective, although RR, but not TcAMPc, was significantly greater in the SD group in response to 10(-7) M PGE2 than RR in the SL group. Addition of the phosphodiesterase inhibitor theophylline (10(-4) M) together with the same three PGE2 doses maintained the stimulatory effect of 10(-5)M PGE2 alone on RR and TcAMPc in both groups of slices, and reversed the effect of 10(-7) M PGE2 alone on RR and TcAMPc in the SD group of slices only. Added by itself, theophylline was ineffective. These data indicate that: PGE2 can stimulate RR by a direct effect on the juxtaglomerular cells; the RR responses to PGE2 and theophylline administration are enhanced in the SD state; and the possibility of cAMP mediation of the effect of PGE2 on RR is discussed.
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
September 1990,
The Journal of physiology,
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
October 1971,
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.),
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
June 1977,
Revista espanola de fisiologia,
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
January 1998,
Life sciences,
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
January 1992,
Eicosanoids,
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
July 1971,
Proceedings of the Society for Experimental Biology and Medicine. Society for Experimental Biology and Medicine (New York, N.Y.),
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
December 1982,
The American journal of physiology,
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
January 1990,
Life sciences,
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
December 1980,
Clinical science (London, England : 1979),
G A Lopez, and
K Khalighi, and
A Ebneshahidi, and
E Gonzales, and
S Jaramillo, and
S Rivas
August 1982,
Japanese journal of pharmacology,
