Possible Interaction: Adenosine and Methionine

“ AD agonists at 10-5 M caused a significant increase in RMP to −69.5 ± 0.2 mV for AD, to −82.2 ± 0.3 mV for CAD, and to −81.2 ± 0.3 mV for NECA in porcine coronary arteries with intact endothelium.”

“Moreover, AD agonists at 10-5 M caused a smaller but significant increase in RMP to −54.3 ± 0.2 mV for AD, −56.1 ± 0.1 mV for CAD, and −61.1 ± 0.2 mV for NECA without endothelium.”

“These data reveal that there is a rigid structural requirement for binding of the ribose portion of adenosine to both M and P PST that involves the groups on both the 3′ and 5′ positions.”

“ Adenosine and guanosine were considerably less potent inhibitors of methionine synthesis in both the T and B lymphoblasts.”

“8-PSPT 3 × 10-5 M significantly reduced the vasodilatation produced in response to adenosine 5 × 10-10-5 × 10-8 mol without having any effect on the response to 2-meSATP.”

“Three‐minute incubations of cells with adenosine caused a dosedependent accumulation of intracellular cAMP and release of the taurine (EC50 = 5.0 × 10−5 M and 1.6 × 10−6 M, respectively).”

“BY‐1949 (3 × 10−5–10−4 M) as well as dipyridamole (3 × 10−7–10−5 M ) resulted in a significant potentiation of relaxant responses to a cumulative administration of adenosine (10−6–10−3 M), but the drugs did not affect the response to noradrenaline and acetylcholine.”

“The presence of adenosine , L-homocysteine thiolactone and erythro-9-(2-hydroxy-3-nonyl) adenine mixture in the perfusion medium inhibited the contractile effects of L-methionine as well as the incorporation of 3H-methyl groups by about 75%.”

“ Adenosine applied to the serosa caused dose-dependent increases in calculated blood flow with a threshold near 10-5 M and a maximum near 10-3 M. In contrast, even 10-2 M adenosine in the mucosal suffusate did not increase blood flow above baseline.”

“ Adenosine at 5 p M was more active in our system than at 20 times this concentration in studies by other investigators, increasing activity by 580‐840%.”

“2 Diazepam (10−6 and 10−5 m ) had no direct effect per se, but significantly potentiated the inhibitory action of adenosine on both tissues without altering the inhibitory effect of 2‐chloroadenosine.”