MicroRNA In Situ Hybridization in Paraffin-Embedded Human Articular Cartilage and Mouse Knee Joints.

MicroRNA (miRNA) in situ hybridization (ISH) is a highly sensitive method that allows for the detection of expression and distribution of miRNAs in fixed paraffin-embedded tissues. MiRNA ISH requires time-consuming optimization based on the tissue type analyzed, method of tissue fixation, and miRNA detection probe. Here, we provide the optimized miRNA ISH protocol for human cartilage and mouse whole knee joints that also entails the necessary steps for sample collection, processing, and preparation for high-quality ISH staining.