Infrared laser pulse triggers increased singlet oxygen production in tumour cells


Photodynamic therapy (PDT) is a technique developed to treat the ever-increasing global incidence of cancer. This technique utilises singlet oxygen (1O2) generation via a laser excited photosensitiser (PS) to kill cancer cells. However, prolonged sensitivity to intensive light (6-8 weeks for lung cancer), relatively low tissue penetration by activating light (630nm up to 4mm), and the cost of PS administration can limit progressive PDT applications. The development of quantum-dot laser diodes emitting in the highest absorption region (1268nm) of triplet oxygen ( 3O2) presents the possibility of inducing apoptosis in tumour cells through direct 3O2 → 1O 2 transition. Here we demonstrate that a single laser pulse triggers dose-dependent 1O2 generation in both normal keratinocytes and tumour cells and show that tumour cells yield the highest 1O2 far beyond the initial laser pulse exposure. Our modelling and experimental results support the development of direct infrared (IR) laser-induced tumour treatment as a promising approach in tumour PDT.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Additional Information: This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit
Uncontrolled Keywords: General
Publication ISSN: 2045-2322
Last Modified: 30 Apr 2024 07:22
Date Deposited: 02 Feb 2021 13:18
Full Text Link:
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
https://www.nat ... icles/srep03484 (Publisher URL)
PURE Output Type: Article
Published Date: 2013-12-12
Authors: Sokolovski, S. G. (ORCID Profile 0000-0001-7445-7204)
Zolotovskaya, S. A.
Goltsov, A.
Pourreyron, C.
South, A. P.
Rafailov, E. U. (ORCID Profile 0000-0002-4152-0120)

Export / Share Citation


Additional statistics for this record