Synthesis and in vitro evaluation of the antitumoral phototherapeutic potential of squaraine cyanine dyes derived from indolenine
作者:Eurico Lima、Octávio Ferreira、Vanessa S.D. Gomes、Adriana O. Santos、Renato E. Boto、José R. Fernandes、Paulo Almeida、Samuel M. Silvestre、Lucinda V. Reis
DOI:10.1016/j.dyepig.2019.04.007
日期:2019.8
wavelength close to the maximum absorption wavelength of the squaraine dyes. The indolenine squaraine dyes showed a high ability to produce singlet oxygen and good photostability. The zwitterionic dyes, namely the unsubstituted dye, the barbituric acid derivative and the monothiosquaraine dye, showed relevant photodynamic activity. It was noteworthy that the unsubstituted squaraine dye exhibited a cytotoxic
在这项工作中,合成了位于四元中心环上的具有不同基团的几种对称的吲哚烯酸方酸菁染料,例如硫,巴比妥酸,氨基和甲氨基,并对其结构进行了充分表征。所有染料在可见光区域均显示出强而窄的吸收带。为了评估它们的单线态氧形成能力,使用了1,3-二苯基异苯并呋喃测定。为了推断它们的光稳定性,评估了这些方酸菁染料在曝光时的降解。在体外通过3-(4,5-二甲基噻唑-2-基)-2,5-二苯基溴化四溴化铵测定方法在几种肿瘤(Caco-2,MCF-7和PC-3)中评估了这些化合物作为光敏剂的光动力疗法潜力和非肿瘤(NHDF和N27)细胞系,使用定制的基于LED的曝光系统,发射的辐射中心波长接近方酸染料的最大吸收波长。吲哚烯酸方酸染料显示出产生单线态氧的高能力和良好的光稳定性。两性离子染料,即未取代的染料,巴比妥酸衍生物和一硫代方酸染料具有相关的光动力学活性。值得注意的是,与NHDF正常细胞系相比,未取代的方酸染料对