“…It is now evident that nAChRs not only play an important role in neuronal function and the addiction to nicotine [ 151 , 152 ] but may also serve as targets for therapeutic intervention in various neuropsychiatric/neurodegenerative disorders, including PD [ 25 , 153 , 154 ], depression [ 153 , 155 , 156 ], obsessive–compulsive disorder [ 157 , 158 ], ADHD [ 159 ], Tourette syndrome [ 160 , 161 , 162 ], mild cognitive impairment or Alzheimer’s disease [ 163 , 164 , 165 , 166 ], ischemia [ 167 ], catalepsy [ 168 ], schizophrenia [ 4 , 166 , 169 ], pain [ 147 , 170 ], energy balance [ 171 , 172 ], autoimmune disorders [ 173 ], and even sleep–wake cycle dysregulation [ 174 ]. These receptors are also expressed abundantly in a variety of immune cells, including B cells, T cells, macrophages, and microglia, and are believed to contribute to the anti-inflammatory effects of nicotine [ 175 , 176 , 177 , 178 ].…”