Localization of VIP36 in the Post-Golgi Secretory Pathway Also of Rat Parotid Acinar Cells

Localization of VIP36 in the Post-Golgi Secretory Pathway Also of Rat Parotid Acinar Cells
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VIP36 在大鼠腮腺腺泡细胞高尔基体后分泌途径中的定位

DOI:
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发表时间:
2003
影响因子:
3.2
通讯作者:
H. Ishikawa
H. Ishikawa
中科院分区:
生物学3区
文献类型:
--
作者:
O. Shimada;S. Hara;K. Yamashita;H. Tosaka;Liang Yanchao;Li Einan;S. Atsumi;H. Ishikawa

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VIP 36(36-kD囊泡整合膜蛋白)最初从Madin-Darby犬肾(MDCK)上皮细胞中纯化,属于动物凝集素家族,并且可能充当货物受体。为了了解其在分泌过程中的作用,我们进行了大鼠腮腺的形态学分析。免疫电子显微镜提供的证据表明,内源性VIP 36是本地化的trans-Golgi网络,不成熟的颗粒,并在腺泡细胞的成熟分泌颗粒。双染色免疫荧光实验证实,VIP 36和淀粉酶共定位于腺泡细胞的顶端区域。这是第一个研究表明,内源性VIP 36参与后高尔基体分泌途径,表明VIP 36在颗粒形成过程中的分泌和/或膜蛋白的运输和分选中发挥作用。
VIP36 (36-kD vesicular integral membrane protein), originally purified from Madin-Darby canine kidney (MDCK) epithelial cells, belongs to a family of animal lectins and may act as a cargo receptor. To understand its role in secretory processes, we performed morphological analysis of the rat parotid gland. Immunoelectron microscopy provided evidence that endogenous VIP36 is localized in the trans-Golgi network, on immature granules, and on mature secretory granules in acinar cells. Double-staining immunofluorescence experiments confirmed that VIP36 and amylase co-localized in the apical regions of the acinar cells. This is the first study to demonstrate that endogenous VIP36 is involved in the post-Golgi secretory pathway, suggesting that VIP36 plays a role in trafficking and sorting of secretory and/or membrane proteins during granule formation.
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DOI: 10.1016/s0167-4889(99)00052-x
发表时间: 1999
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