Glycine-extended processing intermediates of gastrin and cholecystokinin in human plasma.

Glycine-extended processing intermediates of gastrin and cholecystokinin in human plasma.
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人血浆中胃泌素和胆囊收缩素的甘氨酸扩展加工中间体。

DOI:
10.1016/0016-5085(89)91685-5
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发表时间:
1989
期刊:
影响因子:
29.4
通讯作者:
Yamada,T
Yamada,T
中科院分区:
医学1区
文献类型:
--
作者:
DelValle,J;Sugano,K;Yamada,T

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生物活性胃泌素和胆囊收缩素 (CCK) 的生物合成需要从胃泌素和 CCK 的甘氨酸延伸前体形成羧基末端酰胺化肽。在之前的研究中,我们和其他人已经鉴定并表征了人类胃肠道中胃泌素 (G-gly) 和 CCK (CCK-gly) 的甘氨酸延伸形式。为了探索这些肽对人类的潜在生物学重要性,我们检查了它们在循环中的释放。摄入标准膳食会导致血浆 G/CCK-gly 浓度双相上升,但只有最初的上升与胃泌素释放相关。十二指肠内脂质输注导致 CCK-gly 免疫反应性选择性升高,但胃泌素或 G-gly 没有增加。凝胶过滤色谱显示,基础血浆中 G/CCK-gly 的主要分子形式与 CCK8-gly 共洗脱,但响应膳食刺激,其他分子形式也有所增加。血浆中前胃泌素和胆囊收缩素前翻译后加工的甘氨酸延伸中间体的测量可能有助于确定它们在健康和疾病中的生理重要性。
The biosynthesis of biologically active gastrin and cholecystokinin (CCK) requires the formation of carboxyl-terminally amidated peptides from glycine-extended precursors of gastrin and CCK. In previous studies we and others have identified and characterized glycine-extended forms of gastrin (G-gly) and CCK (CCK-gly) in the human gastrointestinal tract. To explore the potential biologic importance of these peptides in humans, we examined their release into the circulation. Ingestion of a standard meal induced a biphasic rise in plasma G/CCK-gly concentration, but only the initial increase correlated with gastrin release. Intraduodenal lipid infusion caused a selective rise in CCK-gly immunoreactivity with no increase in gastrin or G-gly. Gel filtration chromatography revealed that the predominant molecular form of G/CCK-gly in basal plasma coeluted with CCK8-gly, but in response to meal stimulation, increases in other molecular forms were noted. Measurement of glycine-extended intermediates of progastrin and procholecystokinin posttranslational processing in plasma may aid in determining their physiologic importance in health and disease.
DOI: --
发表时间: 1985
期刊: The Journal of biological chemistry
影响因子: --
作者:
Sugano,K;Aponte,GW;Yamada,T
通讯作者: Yamada,T
DOI: --
发表时间: 1986
影响因子: 4.8
作者:
J. Rehfeld;H. Hansen
通讯作者: H. Hansen
猪胃泌素编码cDNA全长的分子克隆和核苷酸序列。
DOI: 10.1073/pnas.79.4.1049
发表时间: 1982
影响因子: 11.1
作者:
Yoo,OJ;Powell,CT;Agarwal,KL
通讯作者: Agarwal,KL
去酰胺胃泌素的生理学和免疫学研究。
DOI: 10.1016/s0016-5085(72)80038-6
发表时间: 1972
期刊: Gastroenterology
影响因子: 29.4
作者:
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通讯作者: Henry F. Thomas
通过胰蛋白酶-羧肽酶 B 裂解后甘氨酸延伸肽的放射免疫测定法测量 α-酰胺化激素的前体。
DOI: 10.1016/0003-2697(86)90129-6
发表时间: 1986
影响因子: 2.9
作者:
L. Hilsted;J. Rehfeld
通讯作者: J. Rehfeld