Hydrocyanines: A Class of Fluorescent Sensors That Can Image Reactive Oxygen Species in Cell Culture, Tissue, and In Vivo
作者:Kousik Kundu、Sarah F. Knight、Nick Willett、Sungmun Lee、W. Robert Taylor、Niren Murthy
DOI:10.1002/anie.200804851
日期:2009.1.2
Accurate and tunable: The title compounds can detect reactiveoxygenspecies (ROS) in cellculture, tissue explants, and for the first time in vivo. The hydrocyanines are synthesized by reduction of the cyanine dyes with NaBH4. They can accurately detect nanomolar levels of ROS, have excellent stability against autoxidation, and have tunable emission wavelengths in the range 560–830 nm.
A Significant Improvement of the Efficacy of Radical Oxidant Probes by the Kinetic Isotope Effect
作者:Kousik Kundu、Sarah F. Knight、Seungjun Lee、W. Robert Taylor、Niren Murthy
DOI:10.1002/anie.201002228
日期:2010.8.16
A breath of fresh air: The rate of aerial oxidation of dihydroethidium and hydrocyanine radical oxidant probes can be selectively reduced by deuteration (see picture). The reaction rate between the deuterated compounds and the superoxide radical was reduced by a much smaller factor because of mechanistic differences between the two reactions. The deuterated probes are more effective than their hydrogen