Potentiation of norepinephrine and adenosine in the renal circulation by 2,6-bis (diethanolamino)-4,8-dipiperidino-pyrimido (5,4-d) pyrimidine (dipyridamole) treatment (preliminary report).

نویسندگان

  • K Yasuda
  • S Satoh
  • N Taira
  • K Hashimoto
چکیده

It was demonstrated in both in vivo and in vitro experiments on the renal circula tion that dipyridamole produced the potentiation of vascular responses not only to adenosine but also to norepinephrine. The potentiation of these responses was observed when concentrations of dipyridamole were relatively low. As the concentration of dipyridamole was elevated, the potentiation was rather decreased and finally abolished. Furthermore, in in vitro experiments, higher concentrations of dipyridamole blocked the action of norepinephrine. These results cast doubt on the mode of dipyridamole action, which has been interpreted as inhibition of deamination of adenosine.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Influence of a Pyrimidopyrimidine Derivative on Deamination of Adenosine by Blood.

• A new synthetic compound, Persantin (RA-8 or 2,6-Bis(diethanolamino)-4,8-dipiperidino-pyTimido(5,4-d) -pyrimidine), has recently been reported to produce coronary vasodilation without an associated increase in cardiac work. Although the mechanism responsible for the coronary vasodilation produced by Persantin has not been elucidated, there are some indications that an indirect action on myoca...

متن کامل

Influence of a Pyrlmidopyrimidine Derivative on Deamination of Adenosine by Blood

• A new synthetic compound, Persantin (RA-8 or 2,6-Bis(diethanolamino)-4,8-dipiperidino-pyTimido(5,4-d) -pyrimidine), has recently been reported to produce coronary vasodilation without an associated increase in cardiac work. Although the mechanism responsible for the coronary vasodilation produced by Persantin has not been elucidated, there are some indications that an indirect action on myoca...

متن کامل

Dipyridamole inhibits hydroxylamine augmented nitric oxide (NO) production by activated polymorphonuclear neutrophils through an adenosine-independent mechanism.

Polymorphonuclear neutrophils (PMN) are thought to play a role in reperfusion injury and ischemia. These effects are partly mediated by toxic oxygen species (superoxide anion, hydrogen peroxide and hydroxyl radical) acting at the level of the endothelium. It was demonstrated recently that the superoxide anion reacts with nitric oxide (NO) and that interaction leads to the generation of highly t...

متن کامل

Developmental aspects of hepatic and extrahepatic drug-metabolizing enzyme systems: microsomal enzymes and components in rabbit liver and lung during the first month of life.

AND BRENDA COLASANTI 23 Acetylcholinesterase Inhibition and Morphine Effects in Morphine Tolerant and Dependent Mice. HEMENDRA N. BHARGAVA AND E. LEONG WAY 31 Studies on the Transport of Morphine into the Cerebrospinal Fluid of Rabbits. J. H. WANG AND A. E. TAKEMORI 41 The Effect of 6-Hydroxydopamine on Morphine Tolerance and Physical Dependence. GLADYS FRIEDLER, HEMENDRA H. BHARGAVA, RAYMOND Q...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • The Tohoku journal of experimental medicine

دوره 96 2  شماره 

صفحات  -

تاریخ انتشار 1968