Secretion of the angiogenic factor VEGF after photodynamic therapy with ALA under hypoxia-like conditions in colon cancer cells.

Autor: Kawczyk-Krupka A; School of Medicine with the Division of Dentistry in Zabrze, Department of Internal Diseases, Angiology and Physical Medicine, Center for Laser Diagnostics and Therapy, Medical University of Silesia, Batorego Street 15, 41-902 Bytom, Poland. Electronic address: akawczyk@gmail.com., Kwiatek B; Specialist Hospital No2, Department of Internal Diseases, Angiology and Physical Medicine, Center for Laser Diagnostics and Therapy, Batorego Street 15, 41-902 Bytom, Poland., Czuba ZP; School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice, Department of Microbiology and Immunology, 19 Jordana St., 41-808 Zabrze, Poland. Electronic address: zczuba@sum.edu.pl., Mertas A; School of Medicine with the Division of Dentistry in Zabrze, Medical University of Silesia in Katowice, Department of Microbiology and Immunology, 19 Jordana St., 41-808 Zabrze, Poland. Electronic address: amertas@sum.edu.pl., Latos W; Specialist Hospital No2, Department of Internal Diseases, Angiology and Physical Medicine, Center for Laser Diagnostics and Therapy, Batorego Street 15, 41-902 Bytom, Poland. Electronic address: wojlatos@gmail.com., Verwanger T; Department of Molecular Biology, University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria. Electronic address: thomas.verwanger@sbg.ac.at., Krammer B; Department of Molecular Biology, University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria. Electronic address: barbara.krammer@sbg.ac.at., Sieroń A; School of Medicine with the Division of Dentistry in Zabrze, Department of Internal Diseases, Angiology and Physical Medicine, Center for Laser Diagnostics and Therapy, Medical University of Silesia, Batorego Street 15, 41-902 Bytom, Poland.
Jazyk: angličtina
Zdroj: Photodiagnosis and photodynamic therapy [Photodiagnosis Photodyn Ther] 2018 Mar; Vol. 21, pp. 16-18. Date of Electronic Publication: 2017 Oct 24.
DOI: 10.1016/j.pdpdt.2017.10.020
Abstrakt: Background: Photodynamic therapy (PDT), eliminates not only the tumor, but also modulates signaling factors release, e.g. vascular endothelial growth factor (VEGF), which plays a crucial role in cancer progression. Assessment of the VEGF-secreting activity of resistant colon cancer cells in different degree of malignancy: SW480 and SW620 under hypoxia-like conditions during δ- aminolevulinic acid (ALA) PDT was the objective of our study.
Methods: The colon cancer cell lines SW480 and SW620 were treated in sublethal doses with ALA PDT in hypoxia- like conditions with cobalt chloride (CoCl 2 ). To assess cell viability, MTT assays were performed and the discrimination of the cell death mode was monitored via fluorescence microscopy. The cells cytotoxicity using LDH test was assessed. Determination of VEGF was carried out using the Bio- Plex Assay Pro™ kit on the Bio- Plex Suspension Array System.
Results: ALA PDT used in sublethal doses decreases release of VEGF in more aggressively growing SW620 colon cancer cell line in hypoxia-like conditions. In addition the level of secretion of VEGF in SW620 was much higher than in SW480 cells, which correlates with the grade of aggressive growth of colon cancer cells.
Conclusion: Our outcomes offer evidence, that in hypoxia mimic condition sublethal ALA-PDT- mediated VEGF inhibition could be clinically relevant.
(Copyright © 2017 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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