Photoinduced DNA cleavage by atomic oxygen precursors in aqueous solutions
作者:James Korang、Ismaila Emahi、Whitney R. Grither、Sara M. Baumann、Dana A. Baum、Ryan D. McCulla
DOI:10.1039/c3ra41597j
日期:——
Reactive oxygen species are known to induce DNA strand cleavage and have been explored as treatments for cancer. The development of aqueous-soluble dibenzothiophene-S-oxide (DBTO) derivatives has made it possible to investigate the mechanism of DNA cleavage by these photoactivatable precursors of atomic oxygen. In addition to the release of atomic oxygen, DBTO can also undergo other processes such as α-cleavage. An objective of this work was to establish whether the extent of strand scission could be attributed to a direct reaction between atomic oxygen and DNA. To accomplish this aim, the extent of strand cleavage upon irradiation of three different DBTO derivatives was measured by the conversion of circular pUC19 plasmid (Form I) to nicked (Form II) as monitored by gel electrophoresis. The interaction of the sulfoxides with DNA was systematically studied by optical melt and fluorescence anisotropy experiments. Thiols are susceptible to rapid oxidation by atomic oxygen, and thus, glutathione was used as a ROS scavenger to determine if DNA cleavage was induced by the release of atomic oxygen. The results from these experiments indicated atomic oxygen was at least partially responsible for the observed strand scission.
[EN] DIBENZOTHIOPHENE DERIVATIVES AND METHODS OF TREATING CANCER THEREWITH<br/>[FR] DÉRIVÉS DE DIBENZOTHIOPHÈNE ET PROCÉDÉS DE TRAITEMENT DU CANCER À L'AIDE DE CEUX-CI
申请人:UNIV SAINT LOUIS
公开号:WO2019199939A1
公开(公告)日:2019-10-17
In one aspect, the present disclosure provides a compound of the formula: (I) wherein the variables are as defined herein. In another aspect, the present disclosure also provides pharmaceutical compositions and methods of use of the compounds disclosed herein.
DIBENZOTHIOPHENE DERIVATIVES AND METHODS OF TREATING CANCER THEREWITH
申请人:Saint Louis University
公开号:US20210077458A1
公开(公告)日:2021-03-18
In one aspect, the present disclosure provides a compound of the formula: (I) wherein the variables are as defined herein. In another aspect, the present disclosure also provides pharmaceutical compositions and methods of use of the compounds disclosed herein.
US6022307A
申请人:——
公开号:US6022307A
公开(公告)日:2000-02-08
Synthesis of Aromatic Disulfonic Acids for Water-Soluble Dibenzothiophene Derivatives
highly effective for one DBTO disulfonic acid derivative (>99% pure). The direct approach was the most straightforward and highest-yielding route. Additionally, a highly effective, scalable, and improved purification method was identified for disulfonic acid DBT and DBTO derivatives, allowing for the isolation of positional isomers and other modifications by using reverse-phase high-performance flash chromatography