Nicotine Effects and Neuroprotection in Parkinson's Disease
Summary
Parkinson’s disease is characterised by progressive loss of dopaminergic neurons in the substantia nigra, leading to motor impairments and non-motor symptoms. Epidemiological evidence has long noted an inverse association between tobacco use and Parkinson’s risk, prompting examination of nicotine as a neuroprotective agent rather than as a mere risk factor. Nicotine interacts with nicotinic acetylcholine receptors (nAChRs) on both neurons and glial cells, modulating neurotransmitter release, attenuating neuroinflammation and promoting cell survival pathways. In preclinical models, nicotine has been shown to suppress apoptosis, reduce oxidative stress and stabilise protein homeostasis via the unfolded protein response. Key intracellular signalling cascades—such as the prok2R/Akt/FoxO3a axis—mediate neuronal resilience, while glial nAChR stimulation dampens astrocyte and microglial activation. More recently, suppression of SIRT6 by nicotine has emerged as a means to curtail pro-inflammatory gene expression and enhance neuronal viability. Collectively, this body of work underscores nicotine’s multifaceted action on neural and glial targets, offering insight into potential adjunctive strategies for slowing neurodegeneration in Parkinson’s disease.
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Nicotine Effects and Neuroprotection in Parkinson's Disease publication trend
The graph below shows the total number of articles in nicotine effects and neuroprotection in parkinson's disease across all publications each year (not limited to Nature Index journals).
Technical terms
Nicotinic acetylcholine receptor (nAChR): Ion channel on neuronal and glial membranes activated by acetylcholine or nicotine.
Dopaminergic neuron: Neuron that synthesises the neurotransmitter dopamine, notably in the substantia nigra.
Neuroinflammation: Inflammatory response within the central nervous system involving microglia and astrocytes.
MPTP: Neurotoxin used in experimental models to induce dopaminergic neuron degeneration resembling Parkinson’s disease.
Akt/FoxO3a axis: Intracellular signalling pathway regulating cell survival and apoptosis.
SIRT6: Nuclear deacetylase implicated in DNA repair and inflammatory regulation, with a pathogenic role in Parkinson’s disease.
Unfolded protein response (UPR): Cellular mechanism activated by accumulation of misfolded proteins in the endoplasmic reticulum.
References
- Nicotine restores olfactory function by activation of prok2R/Akt/FoxO3a axis in Parkinson’s disease. Journal of Translational Medicine (2024).
- Nicotinic Acetylcholine Receptors in Glial Cells as Molecular Target for Parkinson’s Disease. Cells (2024).
- Nicotine promotes neuron survival and partially protects from Parkinson’s disease by suppressing SIRT6. Acta Neuropathologica Communications (2018).
- Smoking-Relevant Nicotine Concentration Attenuates the Unfolded Protein Response in Dopaminergic Neurons. Journal of Neuroscience (2016).
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