RIC3 (Resistance to Inhibitors of Cholinesterase 3) is a molecular chaperone that facilitates proper assembly and surface trafficking of nicotinic acetylcholine receptors (nAChRs), particularly the α7 subunit (CHR11) 1. The protein promotes functional expression of homomeric α7 receptors and various heteromeric acetylcholine receptor subtypes. RIC3 functions by enhancing receptor assembly in the endoplasmic reticulum, with variants like RIC3G88R showing increased interactions with α7 protein that paradoxically decrease surface expression 2. The chaperone plays a crucial role in the cholinergic anti-inflammatory pathway, as siRNA-mediated silencing of RIC3 eliminates anti-inflammatory effects of cholinergic agonists in macrophages 3. RIC3 expression is dynamically regulated during immune activation and shows coordinated expression with CHR11 in multiple sclerosis patients 3. Under endoplasmic reticulum stress conditions, RIC3 upregulation occurs alongside altered nAChR membrane expression patterns 4. While rare RIC3 variants have been suggested as potential Parkinson's disease risk factors in some populations 5, large-scale replication studies in European, Latin American, and East Asian cohorts have not confirmed this association 67.