Transgenic lines overexpressing either human wild-type or mutant (A53T) forms of the SNCA (alpha-synclein) gene under a pan-neuronal promoter live on average about 25% longer, even in weak (m577) and strong (e1370) daf-2 mutant backgrounds, and exhibited decreased pharyngeal pumping and egg-laying. Wild-type SNCA crossed into eat-2(ad1113) does not significantly effect lifespan compared to that of the background strain. Pumping rate in wild-type SCNA and A53T SCNA overexpression mutants were less than control already at day 1 of adulthood. The attenuation of lifespan exptesion by SNCA overexpression by growing on thick bacterial lawns, suggests that DR may explain some fo the effects on lifespan. SCNA overexpression increases average lifespan by 21.3% (wild-type) and 16.3% (A53T) [16782295].

Mutation of SCNA (alias alpha synclein) is associated with Parkinson's disease [9197268], which is characterized with resting tremor, rigidity bradykinesia and posural instability that are associated with selective neurodegeneration of the pigmented neurons in the brain stem (substantia nigra and locus coerues) and the presence of intracytoplasmic inclusion bodies (Lewy bodies) [Yamamura et al. 1973]. The mutated protein (Ala53Thr or Ala30Pro) may misfold, aggregate and resist degradation [11433374].SNCA was found to be associated with longevity [22912757]. SNCA was not found to be associated with longevity [22912757].

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