Wu H, Yeo S, Li J, Wang J, Lee WK, Yoon I. Long-Wavelength Absorbing Benzimidazolo-Chlorin for Enhanced Photodynamic Therapy.
ACS OMEGA 2023;
8:21941-21947. [PMID:
37360422 PMCID:
PMC10285954 DOI:
10.1021/acsomega.3c01807]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/25/2023] [Indexed: 06/28/2023]
Abstract
In this study, we condensed methyl pyropheophorbide-a (2) with 1,2-phenylenediamine to synthesize benzimidazolo-chlorin (3a) as an effective near-infrared photosensitizer (PS) with an absorption maximum of 730 nm. The ability of 3a to generate singlet oxygen, as well as its photodynamic effect on A549 and HeLa cells, was investigated. PS exhibited strong phototoxicity and negligible dark toxicity. Its structure was examined by UV-visible spectroscopy, nuclear magnetic resonance, and high-resolution fast atom bombardment mass spectrometry.
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