Parkinson's disease is marked by the abnormal accumulation of α-synuclein and the early loss of dopamine neurons in the substantia nigra region of the brain. A polymorphism in the promotor of α-synuclein gene known as NACP-Rep1 has been implicated as a risk factor for the disease. Now, researchers have found that different variants of NACP-Rep1 and its interaction with the microtubule-associated protein tau (MAPT) H1 haplotype can influence the speed of clinical deterioration in patients with Parkinson's disease...

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