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The role of transient receptor potential vanilloid type-2 ion channels in innate and adaptive immune responses

机译:暂时性受体潜在香草样2型离子通道在先天和适应性免疫应答中的作用

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摘要

The transient receptor potential vanilloid type-2 (TRPV2), belonging to the transient receptor potential channel family, is a specialized ion channel expressed in human and other mammalian immune cells. This channel has been found to be expressed in CD34+ hematopoietic stem cells, where its cytosolic Ca2+ activity is crucial for stem/progenitor cell cycle progression, growth, and differentiation. In innate immune cells, TRPV2 is expressed in granulocytes, macrophages, and monocytes where it stimulates fMet-Leu-Phe migration, zymosan-, immunoglobulin G-, and complement-mediated phagocytosis, and lipopolysaccharide-induced tumor necrosis factor-alpha and interleukin-6 production. In mast cells, activation of TRPV2 allows intracellular Ca2+ ions flux, thus stimulating protein kinase A-dependent degranulation. In addition, TRPV2 is highly expressed in CD56+ natural killer cells. TRPV2 orchestrates Ca2+ signal in T cell activation, proliferation, and effector functions. Moreover, messenger RNA for TRPV2 are expressed in CD4+ and CD8+ T lymphocytes. Finally, TRPV2 is expressed in CD19+ B lymphocytes where it regulates Ca2+ release during B cell development and activation. Overall, the specific expression of TRPV2 in immune cells suggests a role in immune-mediated diseases and offers new potential targets for immunomodulation.
机译:瞬态受体电位通道2型(TRPV2)属于瞬态受体电位通道家族,是在人和其他哺乳动物免疫细胞中表达的专门离子通道。已发现该通道在CD34 + 造血干细胞中表达,其胞质Ca 2 + 活性对于干/祖细胞至关重要周期进展,增长和分化。在先天免疫细胞中,TRPV2在粒细胞,巨噬细胞和单核细胞中表达,可刺激fMet-Leu-Phe迁移,酵母聚糖,免疫球蛋白G和补体介导的吞噬作用,以及脂多糖诱导的肿瘤坏死因子α和白介素。 6生产。在肥大细胞中,TRPV2的激活使细胞内Ca 2 + 离子通量增加,从而刺激了依赖蛋白激酶A的脱粒。此外,TRPV2在CD56 + 自然杀伤细胞中高表达。 TRPV2协调Ca 2 + 信号在T细胞活化,增殖和效应子功能中的作用。此外,TRPV2的信使RNA在CD4 + 和CD8 + T淋巴细胞中表达。最后,TRPV2在CD19 + B淋巴细胞中表达,并在B细胞发育和激活过程中调节Ca 2 + 的释放。总体而言,TRPV2在免疫细胞中的特异性表达提示在免疫介导的疾病中起作用,并为免疫调节提供了新的潜在靶标。

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