Circulating atrial natriuretic peptides in conscious rats: regulation of release by multiple factors.

Circulating atrial natriuretic peptides in conscious rats: regulation of release by multiple factors.
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清醒大鼠循环心房钠尿肽:多种因素调节释放。

DOI:
10.1126/science.2938258
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发表时间:
1986
期刊:
影响因子:
56.9
通讯作者:
N. Zamir
N. Zamir
中科院分区:
综合性期刊1区
文献类型:
--
作者:
R. Eskay;Z. Żukowska;M. Haass;J. Dave;N. Zamir

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心房中的心肌细胞含有一种激素原,可产生心房钠尿肽 (ANP),具有内在的血流动力学调节活性。 ANP 在大脑中的分布表明这些肽参与中枢心血管调节。根据放射免疫测定的结果,在长期留置导管的清醒大鼠中,等渗盐水或葡萄糖的容量负荷使循环免疫反应性 ANP 的量增加了 4 至 5 倍。高渗氯化钠溶液的高渗激发或氟烷麻醉引起血浆 ANP 的类似增加。去神经心脏制剂获得的结果表明,神经元影响对于容量负荷诱导的 ANP 释放很重要。根据提取血浆的反相高效液相色谱法和收集组分的放射免疫分析判断,清醒啮齿动物中循环的生理上重要的 ANP 似乎是 α-rANP(5-28)(心肽素 III)和 α-rANP(3-28) [ANF(8-33)] 或 α-rANP(1-28) (ANF)。
Cardiocytes in the atria contain a prohormone that gives rise to atrial natriuretic peptides (ANP's), which have intrinsic hemodynamic regulatory activity. The distribution of ANP's in the brain suggests the involvement of these peptides in central cardiovascular regulation. In conscious rats with chronic indwelling catheters, volume loading with isotonic saline or glucose increased the amount of circulating immunoreactive ANP's by a factor of 4 to 5, as determined by radioimmunoassay. Hyperosmotic challenge with a hypertonic NaCl solution or anesthesia with halothane caused similar increases in plasma ANP's. Results obtained with the denervated-heart preparation indicate that neuronal influences are important in the release of ANP's induced by volume loading. As judged from reversed-phase high-performance liquid chromatography of extracted plasma and radioimmunoassay of collected fractions, the circulating physiologically important ANP's in the conscious rodent appear to be alpha-rANP(5-28) (atriopeptin III) and either alpha-rANP(3-28) [ANF(8-33)] or alpha-rANP(1-28) (ANF).
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