Protocol for AI-supported immunofluorescence colocalization analysis in human enteric neurons.

Gastrointestinal motor functions are orchestrated by enteric neurons that display a high degree of anatomical and functional variability. Here, we present a protocol for AI-supported immunofluorescence colocalization analysis in human enteric neurons. We describe steps for human gastric tunica muscularis preparation, immunofluorescent labeling of enteric neurons, and quantification of marker colocalization using Nikon NIS-Elements. This protocol addresses the challenges presented by the high density of neurons within enteric ganglia, overlapping fluorescence signals, background fluorescence, and potential user bias in quantification. For complete details on the use and execution of this protocol, please refer to Gao et al.(1).