by Keyword: Stimulated emission depletion (sted)

Cao, HZ, Zhong, SQ, Shen, Y, Lv, MQ, Zhu, YH, Tian, YP, Luo, K, Huang, W, Battaglia, G, Gong, QY, Tian, XH, (2022). MtDNA specific fluorescent probe uncovering mitochondrial nucleoids dynamics during programmed cell death under super-resolution nanoscopy Chemical Engineering Journal 449, 137763

Mitochondrial nucleoids or mitochondrial DNA (mtDNA) encodes for a variety of enzymes and proteins that are essential for oxidative phosphorylation, mitochondrial fussion/fission and apoptotic processes. However, visulization of mtDNA dynamics in response to external stumili has not yet been achieved. Herein, we developed a fluorescent probe, named BDP, that is capable of specifically bind to mtDNA in vitro and in living cells, without interfering mitochondrial functions. Its large Stokes-Shift and red-emission tail render its suitability for stimulated emission depletion (STED) visulization of mtDNA dynamics in living cells. We sucessfully demonstrated for the first time how apoptotic induced anti-cancer drug could impact on mitochondrial nucleoids, and the morphology evolution of mtDNA from segmentation to dispersion was recorded, in a single mitochondria at nanoscale.

JTD Keywords: Dna, Mitochondrial dna (mtdna), Pyridine salt derivatives, Stimulated emission depletion (sted), Tumor