An amphiphilic ruthenium(II)–polypyridyl appended porphyrin as potential bifunctional two-photon tumor-imaging and photodynamic therapeutic agent
摘要:
An amphiphilic porphyrin appended with a Ru(II)-polypyridyl complex (Ru-P) showing a moderate two-photon absorption cross-section (178.0 +/- 26.8 GM), high singlet oxygen quantum yield and rapid cellular uptake was synthesized. In vitro study using human nasopharyngeal carcinoma cells showed that Ru-P exhibited a strong two-photon induced fluorescence upon uptake, lysosomal localization and potent two-photon induced cytotoxicity. These results show that Ru-P, which was designed to enhance its cellular uptake, can potentially be used as an efficacious bifunctional two-photon tumor-imaging and photodynamic therapeutic agent despite its moderate two-photon absorption cross-section. (C) 2009 Elsevier Inc. All rights reserved.
Synthesis and spectroscopic properties of di-2-pyridyl sulfide (dps) compounds. Crystal structure of [Ru(dps)<sub>2</sub>Cl<sub>2</sub>]
作者:Giuseppe Bruno、Franco Nicolò、Sanda Lo Schiavo、Maria S. Sinicropi、Giuseppe Tresoldi
DOI:10.1039/dt9950000017
日期:——
sulfide)ruthenium(II) complexes containing the ligands CI, NO2, NO, MeCN, py (pyridine), pyz (pyrazine) or 4,4′-bipy (4,4′-bipyridine) have been prepared by usual methods and a new direct procedure from robust [Ru(dps)2CI2]1a(dps = di-2-pyridyl sulfide). This is the main product of the reaction between dps and RuCl3 in refluxing dimethylformamide (dmf) while minor products are the complexes [Ru(dps)(dmf)(CO)CI2]
DNA binding ad photocleavage properties of cationic porphyrin-polypyridyl ruthenium(II) hybrids
作者:Ping Zhao、Jun Li、Li-Jun Yang、Jia-Zheng Lu、Hai-Min Guo、Li-Na Ma、Bing-Hui Ou
DOI:10.1080/00958972.2013.866234
日期:2013.12.10
Three cationic porphyrin-polypyridyl ruthenium(II) hybrids, differing in the planar areas of the polypyridyl moieties, were synthesized and their interactions with DNA investigated using absorption and fluorescence titration, induced circular dichroism spectra, thermal DNA denaturation measurements, as well as surface-enhanced Raman spectroscopy. Ethidium bromide competition experiments determined the binding affinity constants (K-b) of these compounds for CT DNA. DNA photocleavage experiments indicated that these hybrids have a broader cleaving wavelength range than traditional drugs and O-1(2) is the reactive species responsible for the cleavage. The proper planar area was proved to be responsible for the larger K-b and higher DNA photocleavage efficiency.
An amphiphilic ruthenium(II)–polypyridyl appended porphyrin as potential bifunctional two-photon tumor-imaging and photodynamic therapeutic agent
An amphiphilic porphyrin appended with a Ru(II)-polypyridyl complex (Ru-P) showing a moderate two-photon absorption cross-section (178.0 +/- 26.8 GM), high singlet oxygen quantum yield and rapid cellular uptake was synthesized. In vitro study using human nasopharyngeal carcinoma cells showed that Ru-P exhibited a strong two-photon induced fluorescence upon uptake, lysosomal localization and potent two-photon induced cytotoxicity. These results show that Ru-P, which was designed to enhance its cellular uptake, can potentially be used as an efficacious bifunctional two-photon tumor-imaging and photodynamic therapeutic agent despite its moderate two-photon absorption cross-section. (C) 2009 Elsevier Inc. All rights reserved.