gms | German Medical Science

73. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC)
Joint Meeting mit der Griechischen Gesellschaft für Neurochirurgie

Deutsche Gesellschaft für Neurochirurgie (DGNC) e. V.

29.05. - 01.06.2022, Köln

Augmented 5-aminolevulinic acid derived photodynamic therapy

Verstärkung der 5-Aminolävulinsäure-induzierten Photodynamischen Therapie

Meeting Abstract

  • presenting/speaker Michael Schwake - Universitätsklinikum Münster, Klinik für Neurochirurgie, Münster, Deutschland
  • Katharina Ott - Universitätsklinikum Münster, Klinik für Neurochirurgie, Münster, Deutschland
  • Stephanie Schipmann - Universitätsklinikum Münster, Klinik für Neurochirurgie, Münster, Deutschland
  • Eva Bunk - Universitätsklinikum Münster, Klinik für Neurochirurgie, Münster, Deutschland
  • Ali Gorji - Universitätsklinikum Münster, Klinik für Neurochirurgie, Münster, Deutschland
  • Walter Stummer - Universitätsklinikum Münster, Klinik für Neurochirurgie, Münster, Deutschland

Deutsche Gesellschaft für Neurochirurgie. 73. Jahrestagung der Deutschen Gesellschaft für Neurochirurgie (DGNC), Joint Meeting mit der Griechischen Gesellschaft für Neurochirurgie. Köln, 29.05.-01.06.2022. Düsseldorf: German Medical Science GMS Publishing House; 2022. DocP137

doi: 10.3205/22dgnc450, urn:nbn:de:0183-22dgnc4504

Veröffentlicht: 25. Mai 2022

© 2022 Schwake et al.
Dieser Artikel ist ein Open-Access-Artikel und steht unter den Lizenzbedingungen der Creative Commons Attribution 4.0 License (Namensnennung). Lizenz-Angaben siehe http://creativecommons.org/licenses/by/4.0/.


Gliederung

Text

Objective: The 5-aminolevulinic acid (5-ALA) induced elevation concentration of protoporphyrin IX (PPIX) in glioma cells makes photodynamic therapy (PDT) of these tumor cells feasible. Previous experiments showed that additional administration of Ko-143, an ABCG2 inhibitor, may lead to a further elevation of the PPIX concentration in these cells. The aim of this study was to investigate whether adding Ko-143 may influence effect of PDT.

Methods: To evaluate this U87 Glioma cell lines were incubated with 5-ALA (100 µg/ml) and with 5-ALA and Ko-143 (1µM). Cells were irradiated with a laser for 1 hour, with an intensity of 0.1 and 0.2 Watt. WST-1 viability test was performed 24 hours after Laser irradiation to assess cell viability. Control groups included cell lines incubated without 5-ALA, incubated only with Ko-143, or not irradiated with laser.

Results: Cell viability after PDT of cells incubated with 5-ALA was significantly lower than the control groups (P<0.05). Additional incubation with Ko-143 lead to a significant enhanced efficacy of DPT on cell viability in comparison with 5-ALA alone (P<0.05). Incubation with Ko-143 alone did not have any effect.

Conclusion: Adding Ko-143 to 5-ALA leads to higher effect of PDT, with significantly higher rate of cell death. Further experiments with other cell lines, and viability essays should be performed in order to further evaluate these results.