MAOA(单胺氧化酶A)是一种位于X染色体上的基因,编码单胺氧化酶A酶,属于单胺氧化酶基因家族。该家族包括MAOA和MAOB两个成员,它们共同负责分解神经递质如血清素、多巴胺、去甲肾上腺素等单胺类物质,从而调节神经信号的传递和情绪行为。MAOA主要在神经元和肝脏中表达,通过氧化脱氨作用降解过量的神经递质,维持神经系统的平衡。MAOA的功能异常与多种精神疾病相关,例如低活性MAOA变异与攻击性行为、反社会人格障碍和抑郁症风险增加有关,而高活性变异可能与焦虑和强迫症相关。著名的“战士基因”假说即基于MAOA低活性突变与暴力行为的关联。MAOA基因的过表达可能导致神经递质水平过度降低,引发情绪低落或认知功能下降;而表达降低则可能使神经递质积累,导致过度兴奋或冲动行为。此外,MAOA抑制剂(如某些抗抑郁药)通过阻断其活性来提升单胺水平,但可能引发副作用如高血压危象。该基因还受表观遗传调控,早期创伤可能通过甲基化抑制MAOA表达,影响长期行为。MAOA的研究为精神疾病治疗和个体化用药提供了重要靶点,但其复杂作用仍需结合环境因素综合评估。
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MAOA基因(以及对应的蛋白质)的细胞分布位置:
MAOA基因的本体(GO)信息:
名称 |
---|
260 Glycine |
330 Arginine and proline metabolism [PATH:hsa00330] |
340 Histidine metabolism [PATH:hsa00340] |
350 Tyrosine metabolism [PATH:hsa00350] |
360 Phenylalanine metabolism [PATH:hsa00360] |
380 Tryptophan metabolism [PATH:hsa00380] |
982 Drug metabolism - cytochrome P450 [PATH:hsa00982] |
4728 Dopaminergic synapse [PATH:hsa04728] |
4726 Serotonergic synapse [PATH:hsa04726] |
5030 Cocaine addiction [PATH:hsa05030] |
5031 Amphetamine addiction [PATH:hsa05031] |
5034 Alcoholism [PATH:hsa05034] |
名称 |
---|
Amine Oxidase reactions |
Biogenic amines are oxidatively deaminated to aldehydes by MAOA and MAOB |
Biological oxidations |
Dopamine clearance from the synaptic cleft |
Enzymatic degradation of dopamine by COMT |
Enzymatic degradation of Dopamine by monoamine oxidase |
Metabolism |
Metabolism of serotonin |
Neuronal System |
Neurotransmitter Clearance In The Synaptic Cleft |
Neurotransmitter Release Cycle |
Norepinephrine Neurotransmitter Release Cycle |
Phase 1 - Functionalization of compounds |
Serotonin clearance from the synaptic cleft |
Transmission across Chemical Synapses |
疾病名称 | 关系值 | NofPmids | NofSnps | 来源 |
Brunner Syndrome | 0.440271442 | 1 | 4 | BeFree_CLINVAR_CTD_human_MGD_ORPHANET |
Parkinson Disease | 0.136840666 | 7 | 0 | BeFree_CTD_human_GAD |
Autistic Disorder | 0.134549579 | 13 | 0 | BeFree_CTD_human_GAD |
Antisocial Personality Disorder | 0.126710102 | 19 | 0 | BeFree_CTD_human_GAD |
Mental disorders | 0.126253095 | 15 | 0 | BeFree_CTD_human_LHGDN |
Prenatal Exposure Delayed Effects | 0.122367032 | 2 | 0 | CTD_human_GAD |
Pheochromocytoma | 0.120271442 | 1 | 0 | BeFree_CTD_human |
Hepatic Encephalopathy | 0.120271442 | 3 | 0 | BeFree_CTD_human |
Myopathy | 0.12 | 1 | 0 | CTD_human |
Endometriosis | 0.12 | 1 | 0 | CTD_human |
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