CB2 receptor activation inhibits melanoma cell transmigration through the blood-brain barrier.

CB2 receptor activation inhibits melanoma cell transmigration through the blood-brain barrier.
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DOI:
10.3390/ijms15058063
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发表时间:
2014-05-08
影响因子:
5.6
通讯作者:
Krizbai IA
Krizbai IA
中科院分区:
生物学2区
文献类型:
--
作者:
Haskó J;Fazakas C;Molnár J;Nyúl-Tóth Á;Herman H;Hermenean A;Wilhelm I;Persidsky Y;Krizbai IA

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在脑实质转移瘤形成过程中,肿瘤细胞需要通过脑内皮细胞迁移,脑内皮细胞形成血脑屏障(BBB)的形态学基础。肿瘤细胞外渗的机制尚不明确,但在某些方面概括了白细胞的渗出。通过血脑屏障的白细胞外渗减少2型大麻素受体(CB 2)的激活,因此,在本研究中,我们试图研究CB 2受体在黑色素瘤细胞与脑内皮细胞的相互作用中的作用。首先,我们鉴定了脑内皮细胞中存在CB 1、CB 2(A)、GPR 18(转录变体1)和GPR 55受体,而黑色素瘤细胞表达CB 1、CB 2(A)、GPR 18(转录变体1和2)、GPR 55和GPR 119。我们观察到,用JWH-133激活CB 2受体减少了黑素瘤细胞与脑内皮细胞层的粘附。JWH-133也降低了黑素瘤细胞的跨内皮迁移率。我们的研究结果表明,在内皮细胞中诱导的变化是至关重要的CB 2激动剂的效果的调解。我们的数据将CB 2确定为减少源自黑色素瘤的脑肿瘤数量的潜在靶点。
During parenchymal brain metastasis formation tumor cells need to migrate through cerebral endothelial cells, which form the morphological basis of the blood-brain barrier (BBB). The mechanisms of extravasation of tumor cells are highly uncharacterized, but in some aspects recapitulate the diapedesis of leukocytes. Extravasation of leukocytes through the BBB is decreased by the activation of type 2 cannabinoid receptors (CB2); therefore, in the present study we sought to investigate the role of CB2 receptors in the interaction of melanoma cells with the brain endothelium. First, we identified the presence of CB1, CB2(A), GPR18 (transcriptional variant 1) and GPR55 receptors in brain endothelial cells, while melanoma cells expressed CB1, CB2(A), GPR18 (transcriptional variants 1 and 2), GPR55 and GPR119. We observed that activation of CB2 receptors with JWH-133 reduced the adhesion of melanoma cells to the layer of brain endothelial cells. JWH-133 decreased the transendothelial migration rate of melanoma cells as well. Our results suggest that changes induced in endothelial cells are critical in the mediation of the effect of CB2 agonists. Our data identify CB2 as a potential target in reducing the number of brain metastastes originating from melanoma.
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