GRIK3(谷氨酸离子型受体红藻氨酸3型亚基)属于谷氨酸受体家族中的红藻氨酸受体(Kainate受体)亚家族,该家族由GRIK1至GRIK5五个基因组成,共同编码配体门控离子通道,主要参与中枢神经系统的兴奋性突触传递。红藻氨酸受体的共性是通过结合神经递质谷氨酸来介导快速的突触信号传导,影响学习、记忆和神经可塑性。GRIK3编码的蛋白形成功能性受体时需要与其他亚基(如GRIK1或GRIK2)组合,其表达集中于海马、大脑皮层和小脑等区域。该基因的突变可能导致受体功能异常,与精神分裂症、双相情感障碍和抑郁症等精神疾病相关,部分研究显示其单核苷酸多态性(SNP)可能增加疾病风险。若GRIK3过表达,可能引发神经元过度兴奋,导致癫痫或神经毒性;而表达降低则可能损害突触可塑性,影响认知功能。此外,GRIK3还调控神经递质释放,其表达异常可能间接影响多巴胺或GABA能系统。在动物模型中,GRIK3敲除小鼠表现出焦虑样行为减少,但社交能力缺陷,提示其在情绪和行为调节中的复杂作用。目前针对GRIK3的药物研发主要聚焦于精神疾病治疗,但需平衡其调控以避免神经兴奋性失衡。
Glutamate receptors are the predominant excitatory neurotransmitter receptors in the mammalian brain and are activated in a variety of normal neurophysiologic processes. This gene product belongs to the kainate family of glutamate receptors, which are composed of four subunits and function as ligand-activated ion channels. It is not certain if the subunit encoded by this gene is subject to RNA editing as the other 2 family members (GRIK1 and GRIK2). A Ser310Ala polymorphism has been associated with schizophrenia, and there are conflicting reports of its association with the pathogenesis of delirium tremens in alcoholics. [provided by RefSeq, Jul 2008]
谷氨酸受体是哺乳动物脑中的主要兴奋性神经递质受体和在各种正常神经生理过程被激活。该基因产物属于红藻氨酸家族谷氨酸受体,这是由四个亚基和作为配体活化离子通道。如果由该基因编码的亚基是受RNA编辑作为其他2家族成员(GRIK1和GRIK2)它不是一定。一个Ser310Ala多态性已与精神分裂症相关,并有与震颤谵妄的酗酒者发病协会的报道相互矛盾。 [由RefSeq的,2008年7月提供]
GRIK3基因(以及对应的蛋白质)的细胞分布位置:
GRIK3基因的本体(GO)信息:
| 名称 |
|---|
| 4080 Neuroactive ligand-receptor interaction [PATH:hsa04080] |
| 4724 Glutamatergic synapse [PATH:hsa04724] |
| 名称 |
|---|
| Activation of Ca-permeable Kainate Receptor |
| Activation of Kainate Receptors upon glutamate binding |
| Ionotropic activity of Kainate Receptors |
| Neuronal System |
| Neurotransmitter Receptor Binding And Downstream Transmission In The Postsynaptic Cell |
| Presynaptic function of Kainate receptors |
| Transmission across Chemical Synapses |
| 疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
| Small cell carcinoma of lung | 0.12 | 1 | 0 | CTD_human |
| Schizophrenia | 0.018826635 | 8 | 1 | BeFree_GAD_LHGDN |
| Alcoholic Intoxication, Chronic | 0.00764398 | 4 | 1 | BeFree_GAD |
| Major Depressive Disorder | 0.005091382 | 1 | 0 | GAD_LHGDN |
| Alcohol Withdrawal Delirium | 0.002995792 | 1 | 1 | BeFree_LHGDN |
| Obsessive-Compulsive Disorder | 0.002638474 | 1 | 0 | BeFree_GAD |
| Tobacco Use Disorder | 0.002367032 | 1 | 0 | GAD |
| As If Personality | 0.002367032 | 1 | 0 | GAD |
| Bipolar I disorder | 0.000271442 | 1 | 0 | BeFree |
| Recurrent major depressive episodes | 0.000271442 | 1 | 0 | BeFree |
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