CXCR2(C-X-C趋化因子受体2)是一种G蛋白偶联受体,属于CXC趋化因子受体家族,主要表达于中性粒细胞、单核细胞、内皮细胞等免疫相关细胞。它的配体包括IL-8(CXCL8)、GRO-α(CXCL1)、GRO-β(CXCL2)和GRO-γ(CXCL3)等趋化因子。CXCR2通过与这些配体结合,激活下游信号通路(如MAPK和PI3K),介导炎症反应、细胞迁移、血管生成和免疫细胞募集等生物学功能。在炎症和感染过程中,CXCR2帮助中性粒细胞快速迁移至损伤或感染部位,清除病原体并促进组织修复。CXCR2基因突变可能导致功能异常,如受体脱敏或信号传导障碍,从而影响免疫应答,与慢性炎症性疾病(如慢性阻塞性肺病、类风湿性关节炎)、动脉粥样硬化和某些癌症(如乳腺癌、结肠癌)的发生发展密切相关。CXCR2过表达会增强炎症反应,可能导致组织损伤或促进肿瘤血管生成和转移;而降低表达则可能削弱免疫防御功能,增加感染风险或延缓伤口愈合。CXCR2属于CXC趋化因子受体家族,该家族成员(如CXCR1、CXCR3等)均通过结合CXC趋化因子参与炎症和免疫调节,但各自具有不同的配体偏好性和组织分布特点。CXCR2因其在中性粒细胞募集中的核心作用,成为抗炎和抗癌药物开发的潜在靶点。
The protein encoded by this gene is a member of the G-protein-coupled receptor family. This protein is a receptor for interleukin 8 (IL8). It binds to IL8 with high affinity, and transduces the signal through a G-protein activated second messenger system. This receptor also binds to chemokine (C-X-C motif) ligand 1 (CXCL1/MGSA), a protein with melanoma growth stimulating activity, and has been shown to be a major component required for serum-dependent melanoma cell growth. This receptor mediates neutrophil migration to sites of inflammation. The angiogenic effects of IL8 in intestinal microvascular endothelial cells are found to be mediated by this receptor. Knockout studies in mice suggested that this receptor controls the positioning of oligodendrocyte precursors in developing spinal cord by arresting their migration. This gene, IL8RA, a gene encoding another high affinity IL8 receptor, as well as IL8RBP, a pseudogene of IL8RB, form a gene cluster in a region mapped to chromosome 2q33-q36. Alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Nov 2009]
由该基因编码的蛋白质是G蛋白偶联受体家族的一个成员。这种蛋白质是白细胞介素8(IL8)的受体。其结合以高亲和力IL8,并转导通过G-蛋白激活第二信使系统的信号。该受体还结合的趋化因子(C-X-C基序)配体1(CXCL1 / MGSA),已被证明是血清依赖性黑色素瘤细胞生长所需的主要成分的黑色素瘤生长刺激活性的蛋白质,和。该受体介导嗜中性粒细胞迁移至炎症部位。被发现的IL8在肠微血管内皮细胞的血管生成作用通过该受体介导的。在小鼠中敲除研究表明,这种受体控制少突胶质前体在逮捕他们的移民脊髓发育的定位。这个基因,IL8RA,编码另一个高亲和力的IL8受体,以及IL8RBP,IL8RB的假基因,形成在定位于染色体2q33-Q36的区域的基因簇。可变剪接变体,编码相同的蛋白质,也已确定。 [由RefSeq的,2009年11月提供]
CXCR2基因(以及对应的蛋白质)的细胞分布位置:
CXCR2基因的本体(GO)信息:
名称 |
---|
4060 Cytokine-cytokine receptor interaction [PATH:hsa04060] |
4144 Endocytosis [PATH:hsa04144] |
4062 Chemokine signaling pathway [PATH:hsa04062] |
5120 Epithelial cell signaling in Helicobacter pylori infection [PATH:hsa05120] |
名称 |
---|
Chemokine receptors bind chemokines |
Class A/1 (Rhodopsin-like receptors) |
G alpha (i) signalling events |
GPCR downstream signaling |
GPCR ligand binding |
Peptide ligand-binding receptors |
Signal Transduction |
Signaling by GPCR |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Ulcerative Colitis | 0.122638474 | 2 | 1 | BeFree_CTD_human_GAD |
Mastitis | 0.12 | 1 | 0 | CTD_human |
Sepsis | 0.12 | 1 | 0 | CTD_human |
Inflammation | 0.082367032 | 2 | 0 | GAD_RGD |
Colitis | 0.080271442 | 2 | 0 | BeFree_RGD |
Nephritis | 0.080271442 | 1 | 0 | BeFree_RGD |
Periapical Periodontitis | 0.08 | 1 | 0 | RGD |
Demyelinating Diseases | 0.08 | 1 | 0 | RGD |
Lung Injury | 0.08 | 1 | 0 | RGD |
Hyperalgesia | 0.08 | 1 | 0 | RGD |
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