DiOC16(3) | CAS 161433-32-1

DiOC16(3) is a lipophilic carbocyanine dye widely used as a mitochondrial membrane potential (Δψm) fluorescence probe. Its strong fluorescence response in lipid-rich environments enables visualization of energetic status in cells and in cell-like preparations, supporting fluorescence microscopy and plate-based readouts. Because dye accumulation depends on membrane potential-driven partitioning, DiOC16(3) is frequently applied to monitor changes in mitochondrial polarization during experimental workflows.

1. Mitochondrial Membrane Potential Imaging

DiOC16(3) is used in fluorescence microscopy to map mitochondrial membrane potential in cultured cells, where the dye's preferential accumulation in polarized mitochondria produces a bright fluorescence signal. Researchers employ it to compare Δψm across treatments, time courses, and genetic perturbations, often alongside nuclear or cytoskeletal stains to contextualize mitochondrial changes within the broader cellular phenotype. This application is common in cell biology laboratories studying mitochondrial physiology, stress responses, and bioenergetics-related pathways.

2. Flow Cytometry Δψm Assays

DiOC16(3) supports flow cytometry workflows that quantify mitochondrial polarization at the single-cell level. In these assays, cells are stained with the dye and analyzed for fluorescence intensity shifts that reflect changes in Δψm, enabling population-level comparisons across conditions such as compound libraries, knockdowns, or time-dependent stimuli. The reagent is also used for gating strategies that separate subpopulations with distinct mitochondrial states, making it a practical tool for high-throughput cell screening development.

3. Fluorescence Plate-Based Screening

DiOC16(3) is commonly incorporated into fluorescence microplate assays to monitor mitochondrial membrane potential in a format compatible with automated liquid handling and kinetic measurements. Assay developers use the dye to generate time-resolved or endpoint fluorescence readouts in multiwell plates, supporting screening and mechanistic follow-up experiments where mitochondrial polarization is a key functional parameter. This use case is particularly relevant in industrial and academic settings that require standardized, scalable fluorescence quantification rather than imaging-based analysis.

4. Mitochondria-Targeted Membrane Studies

DiOC16(3) is also applied in membrane-focused experimental systems where mitochondrial-like lipid environments are examined for potential-dependent dye accumulation. Researchers use the dye to evaluate how perturbations to membrane energetics and lipid organization influence fluorescence behavior, including studies in isolated mitochondria preparations or membrane-enriched fractions. In these contexts, DiOC16(3) provides a convenient fluorescence-based readout for comparing energetic states across experimental conditions.