Immunohistochemical Staining of S-100 Protein in Human Rectal Suction Biopsy Sections

Source: Chi, S., Fang, et al. Diagnosis of Hirschsprung's Disease by Immunostaining Rectal Suction Biopsies for Calretinin, S100 Protein and Protein Gene Product 9.5. J. Vis. Exp. (2019) This video demonstrates the immunohistochemical staining for S-100 protein in rectal suction biopsy sections. Antigen-retrieved sections are blocked and treated with primary, followed by secondary antibodies against S-100, a marker of Hirschsprung's disease. Chromogenic substrate is added to stain the targeted cells. Samples are dehydrated and mounted before visualizing under the microscope.