Distribution of Angiotensin-Converting Enzyme-Like Activity in Vertebrate Tissues

Distribution of Angiotensin-Converting Enzyme-Like Activity in Vertebrate Tissues
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脊椎动物组织中血管紧张素转换酶样活性的分布

DOI:
10.1086/physzool.61.5.30161264
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发表时间:
1988
期刊:
Physiological Zoology
影响因子:
--
通讯作者:
K. Olson
K. Olson
中科院分区:
--
文献类型:
--
作者:
D. Lipke;K. Olson

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对所有脊椎动物的代表性物种的血管紧张素转换酶样活性(ACELA)的种间和器官间分布进行了研究。通过测定合成底物马尿酰-L-组氨酸-L亮氨酸(HHL)的水解度来测定组织匀浆的活性。几乎所有被研究的动物都在一个或多个器官中发现了Acela,并且在每个纲的至少一个物种中发现了Acela。Acela主要分布在呼吸道(鳃和肺)、肾脏和胃肠道组织中。这些发现表明:(1)ACELA在系统发育上是古老的,(2)存在于所有脊椎动物纲中,(3)保留在相同或功能相似的器官中。这些结果表明,ACELA对于特定组织的正常生理功能是必需的,或者将ACELA放置在重要的血管位置对机体是普遍有益的。ACELA在一个环口和两个弹性支中的存在表明,这种酶早于肾素-血管紧张素系统(RAS)的系统发育。其他多肽,可能是激肽,可能是原始ACE样酶的原始底物。
Interspecies and interorgan distribution of angiotensin-converting enzyme-like activity (ACELA) was examined in representative species from all vertebrate classes. Activity was determined in tissue homogenates by measuring hydrolysis of the synthetic substrate hippuryl-l-histidyl-l-leucine (HHL). Nearly all animals examined exhibited ACELA in one or more organs, and ACELA was found in at least one species from each class. ACELA was predominant in respiratory (gill and lung), renal, and gastrointestinal tissues. These findings demonstrate that ACELA is (1) phylogenetically old, (2) present in all vertebrate classes, and (3) retained in the same or functionally homologous organs. These results suggest either that ACELA is necessary for the proper physiological function of specific tissues or that the placement of ACELA in strategic vascular locations is of general benefit to the organism. The presence of ACELA in a cyclostome and two elasmobranchs indicates that this enzyme predates the phylogenetic development of the renin-angiotensin system (RAS). Other peptides, possibly kinins, may have been the original substrates of primitive ACE-like enzymes.
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影响因子: --
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发表时间: 1984
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