Ancient origin of mast cells.

Ancient origin of mast cells.
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DOI:
10.1016/j.bbrc.2014.07.124
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发表时间:
2014-08-22
影响因子:
3.1
通讯作者:
Stevens, Richard L.
Stevens, Richard L.
中科院分区:
生物学4区
文献类型:
--
作者:
Wong, G. William;Zhuo, Lisheng;Kimata, Koji;Lam, Bing K.;Satoh, Nori;Stevens, Richard L.

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哺乳动物肥大细胞(MC)在各种感染中的前哨作用提出了其进化起源的问题。我们发现海鞘海鞘中的测试细胞在形态和组织化学上与人类皮肤 MC 相似。与后者一样,肠棒状杆菌测试细胞在其颗粒中储存组胺和各种肝素·丝氨酸蛋白酶复合物。此外,当暴露于化合物 48/80 时,他们会胞吐这些预先形成的介质。为了支持组胺数据,分离出源自肠棒状杆菌的 cDNA,该 cDNA 类似于人类 MC 中编码组氨酸脱羧酶的 cDNA。与表达肝素的哺乳动物 MC 一样,激活的测试细胞产生前列腺素 D2,并含有编码蛋白质的 cDNA,该蛋白质类似于人类 MC 生物合成所需的合酶。积累的形态学、组织化学、生物化学和分子生物学数据表明,肠棒状杆菌中的测试细胞是驻留在各种结缔组织中的哺乳动物 MC 的对应物。积累的数据表明 MC 的古老起源早于 5 亿年前脊索动物的出现,远早于适应性免疫的发展。 MC 在整个进化过程中显着的保守性与其在先天免疫中的重要性是一致的。
The sentinel roles of mammalian mast cells (MCs) in varied infections raised the question of their evolutionary origin. We discovered that the test cells in the sea squirt Ciona intestinalis morphologically and histochemically resembled cutaneous human MCs. Like the latter, C. intestinalis test cells stored histamine and varied heparin•serine protease complexes in their granules. Moreover, they exocytosed these preformed mediators when exposed to compound 48/80. In support of the histamine data, a C. intestinalis-derived cDNA was isolated that resembled that which encodes histidine decarboxylase in human MCs. Like heparin-expressing mammalian MCs, activated test cells produced prostaglandin D2 and contained cDNAs that encode a protein that resembles the synthase needed for its biosynthesis in human MCs. The accumulated morphological, histochemical, biochemical, and molecular biology data suggest that the test cells in C. intestinalis are the counterparts of mammalian MCs that reside in varied connective tissues. The accumulated data point to an ancient origin of MCs that predates the emergence of the chordates >500 million years ago, well before the development of adaptive immunity. The remarkable conservation of MCs throughout evolution is consistent with their importance in innate immunity.
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