Sorting of an exocrine secretory protein to the regulated secretory pathway in endocrine cells.

Sorting of an exocrine secretory protein to the regulated secretory pathway in endocrine cells.
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将外分泌分泌蛋白分选至内分泌细胞中受调节的分泌途径。

DOI:
10.1016/s0006-291x(02)02576-7
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发表时间:
2002
影响因子:
3.1
通讯作者:
Gorr,SvenUlrik
Gorr,SvenUlrik
中科院分区:
生物学4区
文献类型:
--
作者:
Cowley,DarrinJ;Chu,Maylene;Gorr,SvenUlrik

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受调节的分泌蛋白储存在分泌颗粒中。虽然内分泌细胞和外分泌细胞的分选和储存过程相似,但内分泌细胞和外分泌细胞类型之间的分选重叠程度尚不清楚。据预测,高效储存在外分泌颗粒中的外分泌调节分泌蛋白也将有效储存在内分泌颗粒中。为了验证这一假设,腮腺腺泡细胞中有效储存的腮腺分泌蛋白(PSP)在内分泌细胞系 GH4C1 和 PC12 中表达。 PSP 在两种细胞类型中都会受到刺激分泌。分泌与内分泌调节的分泌蛋白嗜铬粒蛋白 A 相似,但与分泌的碱性磷酸酶不同,分泌的碱性磷酸酶是内分泌细胞组成性分泌途径的标志物。 GH4C1 细胞的亚细胞分离表明,PSP 与嗜铬粒蛋白 A 共分离,但不与分泌的碱性磷酸酶共分离。
Regulated secretory proteins are stored in secretory granules. While the sorting and storage process appears similar in endocrine and exocrine cells, the extent of overlap of sorting between endocrine and exocrine cell types is not clear. It is predicted that exocrine regulated secretory proteins that are stored with high efficiency in exocrine granules would also be stored efficiently in endocrine granules. To test this hypothesis, parotid secretory protein (PSP), which is stored efficiently in parotid acinar cells, was expressed in the endocrine cell lines GH4C1 and PC12. PSP undergoes stimulated secretion in both cell types. Secretion is similar to that of the endocrine regulated secretory protein chromogranin A but distinct from secreted alkaline phosphatase, a marker for the constitutive secretory pathway in endocrine cells. Subcellular fractionation of GH4C1 cells revealed that PSP co-fractionates with chromogranin A but not with secreted alkaline phosphatase.
DOI: 10.1042/bj2990001
发表时间: 1994-04
期刊: The Biochemical journal
影响因子: --
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DOI: --
发表时间: 1998
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发表时间: 1999
期刊: The American journal of physiology
影响因子: --
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DOI: --
发表时间: 1996
影响因子: 4.8
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