Modulatory effects of type-C natriuretic peptide on sympathetic cotransmission in the rat isolated tail artery.
Modulatory effects of type-C natriuretic peptide on sympathetic cotransmission in the rat isolated tail artery.
复制标题
C 型利尿钠肽对大鼠离体尾动脉交感神经共传递的调节作用。
DOI：
10.1111/j.1440-1681.1998.tb02176.x
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发表时间：
1998
影响因子：
2.9
通讯作者：
Westfall,DP
中科院分区：
文献类型：
--
作者：
Mutafova-Yambolieva,VN;Westfall,DP
1. Rat type‐C natriuretic peptide (CNP) has been studied for its effects on the neurogenically induced overflow of adenosine 5′‐triphosphate (ATP), adenosine 5′‐diphosphate (ADP), adenosine 5‐monophosphate (AMP), adenosine (ADO) and noradrenaline (NA) in endothelium‐free segments of rat isolated tail artery. The overflow of each was evoked by electrical field stimulation (EFS) of 0.5 ms pulses at 8 Hz for 3 min and the amount of ATP, ADP, AMP and ADO was quantified by high‐performance liquid chromatography (HPLC)‐fluorescent detection, while the amount of NA was quantified by HPLC‐electrochemical detection.2. Type‐C natriuretic peptide (100 nmol/L) was found to cause a significant reduction of the overflow of all adenine purines and NA. However, at lower concentrations (1 and 10 nmol/L), CNP caused a significant reduction of the overflow of NA but did not change ATP overflow.3. The overflow of ADP, AMP and ADO was significantly reduced by either concentration of CNP, so that the ratio ATP:ADP was diminished from 1:2 in controls to 1:1 after 1 nmol/L CNP and to 1:1.2 after 10 nmol/L CNP.4. The production of inorganic phosphate (Pi) in response to the exogenous application of ATP was significantly reduced by 1,10 or 100 nmol/L CNP.5. Type‐C natriuretic peptide exerts neuromodulatory effects on the neurogenically induced release of the cotransmitters ATP and NA in rat tail artery, consisting of an inhibition of the release of both ATP and NA. This effect is accompanied by inhibition of the breakdown of ATP by ecto‐ATPases. Either effect results in apparent CNP‐induced differential modulation of the overflow of the cotransmitters ATP and NA.
