Characterization of one- and two-photon photochemical uncaging efficiency

Two-photon uncageable enzyme inhibitors bearing targeting vectors

The activity of two cyclooxygenase-2 enzyme inhibitors, Celecoxib and Lumiracoxib, could be suppressed by coupling to photo-labile protecting groups, so-called photocages. These groups could be further functionalized with a peptide targeting vector for specific cellular delivery. The enzyme inhibition potential of the cyclooxygenase-2 inhibitors could be regained upon two-photon excitation with tissue-transparent near-IR light at 800 nm.

Photolysis quantum yield measurements in the near-UV; a critical analysis of 1-(2-nitrophenyl)ethyl photochemistry

The photolysis quantum yield,Q_p, of 1-(2-nitrophenyl)ethyl phosphate (caged P_i) measured in the near-UV (342 nm peak with 60 nm half-bandwidth) is 0.53. Some general principles relating to measurement ofQ_pvalues are discussed.