Synthesis of sulfonamide conjugates of Cu(<scp>ii</scp>), Ga(<scp>iii</scp>), In(<scp>iii</scp>), Re(<scp>v</scp>) and Zn(<scp>ii</scp>) complexes: carbonic anhydrase inhibition studies and cellular imaging investigations
作者:Jonathan R. Dilworth、Sofia I. Pascu、Philip A. Waghorn、Daniela Vullo、Simon R. Bayly、Martin Christlieb、Xin Sun、Claudiu T. Supuran
DOI:10.1039/c4dt03206c
日期:——
of the Re complexes were prepared in good radiochemical incorporation. Inhibition of various humancarbonicanhydrase isoforms (I, II, IX and XII) was tested with the ‘cold’, non-radiolabelled complexes, and compared with an acetazolamide standard (AZA). The molecular structure of a new, tri-sulfonated porphyrin-labeled sulfonamide was determined using synchrotron X-ray crystallography.
Synthesis, Characterization, and Photoinduced Antibacterial Activity of Porphyrin-Type Photosensitizers Conjugated to the Antimicrobial Peptide Apidaecin 1b
Antimicrobial photodynamic therapy (aPDT) is an emerging treatment for bacterial infections that is becoming increasingly more attractive because of its effectiveness against multi-antibiotic-resistant strains and unlikelihood of inducing bacterial resistance. Among the strategies to enhance the efficacy of PDT against Gram-negative bacteria, the binding to a cationic antimicrobial peptide offers the attractive prospect for improving both the water solubilty and the localization of the photoactive drug in bacteria. In this work we have compared a number of free and apidaecin-conjugated photosensitizers (PSs) differing in structure and charge. Our results indicate that the conjugation of per se ineffective highly hydrophobic PSs to a cationic peptide produces a photosensitizing agent effective against Gram-negative bacteria. Apidaecin cannot improve the phototoxic activity of cationic PSs, which mainly depends on a very high yield of singlet oxygen production in the surroundings of the bacterial outer membrane. Apidaecin-PS conjugates appear most promising for treatment protocols requiring repeated washing after sensitizer delivery.
pH-Dependent Cancer-Directed Photodynamic Therapy by a Water-Soluble Graphitic-Phase Carbon Nitride-Porphyrin Nanoprobe
作者:Chi-Fai Chan、Yan Zhou、Hongyu Guo、Junying Zhang、Lijun Jiang、Wei Chen、Kwok-Keung Shiu、Wai-Kwok Wong、Ka-Leung Wong
DOI:10.1002/cplu.201600085
日期:2016.6
Theranostic photodynamic nanomaterials suffer from poor water solubility and nontargeted toxicity. A water-solublegraphitic-phasecarbon nitride-based material (g-C3 N4 ) conjugated to a positively charged porphyrin P2 (conjugating concentration: 60 μm mg-1 mL-1 ) is shown to be a new concept of photodynamic therapeutic agent (g-C3 N4 -P2). The pH-sensitive emission of g-C3 N4 is the driving force