KIT基因(也称为CD117或干细胞因子受体)是一种原癌基因,属于III型受体酪氨酸激酶(RTK)家族,与PDGFRA、CSF1R等基因同属一个家族。该基因编码的KIT蛋白是一种跨膜受体酪氨酸激酶,主要通过与配体干细胞因子(SCF)结合后被激活,参与细胞信号传导。KIT在造血干细胞、肥大细胞、黑色素细胞和生殖细胞等多种细胞的增殖、分化、存活和迁移中发挥关键作用。KIT蛋白的激活会触发下游信号通路(如PI3K/AKT、RAS/MAPK和JAK/STAT),调控细胞功能。KIT基因突变可能导致其组成性激活(即不依赖配体的持续激活),从而引发异常细胞增殖,与多种疾病相关,包括胃肠道间质瘤(GIST)、肥大细胞增多症、急性髓系白血病(AML)和黑色素瘤等。常见的激活突变发生在KIT基因的外显子11、9、13和17,其中外显子11突变最常见于GIST。KIT过表达或功能获得性突变会促进肿瘤发生,而功能丧失性突变则可能导致贫血、色素沉着异常(如白化病)和生殖细胞发育缺陷。KIT基因的异常表达还会影响其他基因或通路,例如上调抗凋亡蛋白BCL-2或激活STAT3,进一步促进肿瘤生长。KIT抑制剂(如伊马替尼)已成功用于治疗GIST和肥大细胞疾病,但耐药性突变(如外显子17的D816V突变)仍是临床挑战。KIT基因家族(III型RTK)的共性包括具有胞外配体结合域、跨膜域和胞内酪氨酸激酶域,依赖配体诱导的二聚化激活下游信号。
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KIT基因(以及对应的蛋白质)的细胞分布位置:
KIT基因的本体(GO)信息:
名称 |
---|
4014 Ras signaling pathway [PATH:hsa04014] |
4015 Rap1 signaling pathway [PATH:hsa04015] |
4151 PI3K-Akt signaling pathway [PATH:hsa04151] |
4060 Cytokine-cytokine receptor interaction [PATH:hsa04060] |
4144 Endocytosis [PATH:hsa04144] |
4640 Hematopoietic cell lineage [PATH:hsa04640] |
4916 Melanogenesis [PATH:hsa04916] |
5200 Pathways in cancer [PATH:hsa05200] |
5230 Central carbon metabolism in cancer [PATH:hsa05230] |
5221 Acute myeloid leukemia [PATH:hsa05221] |
名称 |
---|
Adaptive Immune System |
Constitutive Signaling by Aberrant PI3K in Cancer |
DAP12 interactions |
DAP12 signaling |
Disease |
Diseases of signal transduction |
Downstream signal transduction |
Downstream signaling events of B Cell Receptor (BCR) |
Downstream signaling of activated FGFR1 |
Downstream signaling of activated FGFR2 |
Downstream signaling of activated FGFR3 |
Downstream signaling of activated FGFR4 |
Fc epsilon receptor (FCERI) signaling |
GAB1 signalosome |
Immune System |
Innate Immune System |
NGF signalling via TRKA from the plasma membrane |
PI-3K cascade:FGFR1 |
PI-3K cascade:FGFR2 |
PI-3K cascade:FGFR3 |
PI-3K cascade:FGFR4 |
PI3K events in ERBB2 signaling |
PI3K events in ERBB4 signaling |
PI3K/AKT activation |
PI3K/AKT Signaling in Cancer |
PIP3 activates AKT signaling |
Regulation of KIT signaling |
Role of LAT2/NTAL/LAB on calcium mobilization |
Signal Transduction |
Signaling by EGFR |
Signaling by ERBB2 |
Signaling by ERBB4 |
Signaling by FGFR |
Signaling by FGFR1 |
Signaling by FGFR2 |
Signaling by FGFR3 |
Signaling by FGFR4 |
Signaling by PDGF |
Signaling by SCF-KIT |
Signaling by the B Cell Receptor (BCR) |
Signalling by NGF |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Gastrointestinal Stromal Tumors | 0.760239544 | 656 | 19 | BeFree_CLINVAR_CTD_human_GAD_LHGDN_MGD_ORPHANET_UNIPROT |
Piebaldism | 0.566514605 | 27 | 10 | BeFree_CLINVAR_CTD_human_MGD_ORPHANET_UNIPROT |
Leukemia, Myelocytic, Acute | 0.301492667 | 121 | 4 | BeFree_CLINVAR_CTD_human_GAD_LHGDN |
Mastocytosis, Systemic | 0.281242809 | 86 | 5 | BeFree_CLINVAR_CTD_human_GAD_LHGDN |
Small cell carcinoma of lung | 0.129238955 | 24 | 0 | BeFree_CTD_human_LHGDN |
Neoplasm Recurrence, Local | 0.127101096 | 4 | 0 | CTD_human_GAD |
Leukemia, Mast-Cell | 0.126253095 | 14 | 5 | BeFree_CLINVAR_LHGDN |
Mammary Neoplasms | 0.12272435 | 2 | 0 | CTD_human_LHGDN |
Non-Small Cell Lung Carcinoma | 0.121628651 | 7 | 0 | BeFree_CTD_human |
Testicular Germ Cell Tumor | 0.120542884 | 2 | 0 | BeFree_CTD_human |
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