Abstract
Mitochondria contribute to redox and calcium balance, and apoptosis thus regulating cellular fate. In the present study, mitochondrial staining applying a novel dye, V07-07059, was performed in human embryonic kidney cells, a human vascular endothelial cell line and primary human mononuclear cells. The new fluorescent mega Stokes dye (peak excitation: 488nm, peak emission: 554nm) showed superior fluorescent properties and stability. V07-07059 stains mitochondria dependent on their membrane potential and is safe to use in vitro and in vivo. Unlike other dyes applied in this context (e.g. Tetramethylrhodamine methyl ester), V07-07059 only marginally inhibits mitochondrial respiration and function. V07-07059 enables real time imaging of mitochondrial trafficking and remodeling. Prolonged staining with V07-07059 demonstrated the dyes suitability as a novel probe to track cells. In comparison to the widely used standard for cell proliferation and tracking studies 5(6)-diacetate N-succinimidyl ester, V07-07059 proved superior regarding toxicity and photostability.
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