| ID |
Name |
No. of Genes in ADHDgene |
Brief Description |
| hsa05010 |
Alzheimer's disease |
40 |
Alzheimer's disease (AD) is a chronic disorder that slowly d......
Alzheimer's disease (AD) is a chronic disorder that slowly destroys neurons and causes serious cognitive disability. AD is associated with senile plaques and neurofibrillary tangles (NFTs). Amyloid-beta (Abeta), a major component of senile plaques, has various pathological effects on cell and organelle function. The extracellular Abeta oligomers may activate caspases through activation of cell surface death receptors. Alternatively, intracellular Abeta may contribute to pathology by facilitating tau hyper-phosphorylation, disrupting mitochondria function, and triggering calcium dysfunction. To date genetic studies have revealed four genes that may be linked to autosomal dominant or familial early onset AD (FAD). These four genes include: amyloid precursor protein (APP), presenilin 1 (PS1), presenilin 2 (PS2) and apolipoprotein E (ApoE). All mutations associated with APP and PS proteins can lead to an increase in the production of Abeta peptides, specfically the more amyloidogenic form, Abeta42. FAD-linked PS1 mutation downregulates the unfolded protein response and leads to vulnerability to ER stress.
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|
| hsa01100 |
Metabolic pathways |
237 |
|
| hsa00020 |
Citrate cycle (TCA cycle) |
3 |
The citrate cycle (TCA cycle, Krebs cycle) is an important a......
The citrate cycle (TCA cycle, Krebs cycle) is an important aerobic pathway for the final steps of the oxidation of carbohydrates and fatty acids. The cycle starts with acetyl-CoA, the activated form of acetate, derived from glycolysis and pyruvate oxidation for carbohydrates and from beta oxidation of fatty acids. The two-carbon acetyl group in acetyl-CoA is transferred to the four-carbon compound of oxaloacetate to form the six-carbon compound of citrate. In a series of reactions two carbons in citrate are oxidized to CO2 and the reaction pathway supplies NADH for use in the oxidative phosphorylation and other metabolic processes. The pathway also supplies important precursor metabolites including 2-oxoglutarate. At the end of the cycle the remaining four-carbon part is transformed back to oxaloacetate. According to the genome sequence data, many organisms seem to lack genes for the full cycle [MD:M00009], but contain genes for specific segments [MD:M00010 M00011].
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|
| hsa00190 |
Oxidative phosphorylation |
20 |
|
| hsa05016 |
Huntington's disease |
28 |
Huntington disease (HD) is an autosomal-dominant neurodegene......
Huntington disease (HD) is an autosomal-dominant neurodegenerative disorder that primarily affects medium spiny striatal neurons (MSN). The symptoms are choreiform, involuntary movements, personality changes and dementia. HD is caused by a CAG repeat expansion in the IT15gene, which results in a long stretch of polyglutamine close to the amino-terminus of the HD protein huntingtin (Htt). Mutant Htt (mHtt) has effects both in the cytoplasm and in the nucleus. In the cytoplasm, full-length mHtt can interfere with BDNF vesicular transport on microtubules. This mutant protein also may lead to abnormal endocytosis and secretion in neurons, because normal Htt form a complex with the proteins Hip1, clathrin and AP2 that are involved in endocytosis. In addition, mHtt affects Ca2+ signaling by sensitizing InsP3R1 to activation by InsP3, stimulating NMDAR activity, and destabilizing mitochondrial Ca2+ handling. The mHtt translocates to the nucleus, where it forms intranuclear inclusions. Nuclear toxicity is believed to be caused by interference with gene transcription, leading to loss of transcription of neuroprotective molecules such as BDNF. While mHtt binds to p53 and upregulates levels of nuclear p53 as well as p53 transcriptional activity. Augmented p53 mediates mitochondrial dysfunction.
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|
| hsa05012 |
Parkinson's disease |
22 |
Parkinson's disease (PD) is a progressive neurodegenerative ......
Parkinson's disease (PD) is a progressive neurodegenerative movement disorder that results primarily from the death of dopaminergic neurons in the substantia nigra. Mutations in alpha-synuclein, UCHL1 (a ubiquitin carboxy-terminal hydrolase L1), parkin, DJ1 (a parkin-associated protein involved with oxidative stress), and PINK1 (a putative serine threonine kinase) are known to cause early-onset PD. These pathogenic mutations are associated with disease through pathogenic pathways that may commonly lead proteasome dysfunction, mitochondrial impairment, and oxidative stress. Point mutations in alpha-synuclein lead to excessive intracellular accumulation and protofibril formation. Decrease in the amount of soluble alpha-synuclein tends to increase free cytoplasmic dopamine and the formation of reactive oxygen species (ROS). Modification of parkin and UCHL1 are associated with the ubiquitin-proteasome system pathway and may increase proteotoxic stress. Mutations in parkin, DJ1, and PINK1 may alter mitochondiral activity, potentially impairing proteasomal function. Environmental toxins such as N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and rotenone can cause mitochondrial dysfunction and oxidative stress.
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Basic Info
Gene related CNVs (count: 0)
