Cited by 66Photodynamic Therapy Research StudiesCell death mechanisms and regulationNanoplatforms for cancer theranostics

Involvement of both caspase-dependent and -independent pathways in apoptotic induction by hexaminolevulinate-mediated photodynamic therapy in human lymphoma cells

Furre, Ingegerd Eggen, Møller, Michael T. N., Shahzidi, Susan, Nesland, Jahn M., Peng, Qian·2006·Apoptosis

Abstract

Photodynamic therapy (PDT) is a cancer treatment based on the interaction of a photosensitizer, light and oxygen. PDT with the endogenous photosensitizer, protoporphyrin IX (PpIX) induced by 5-aminolevulinic acid (ALA) or its derivatives is a modification of this treatment modality with successful application in dermatology. However, the mechanism of cell destruction by ALA-PDT has not been elucidated. In this study a human T-cell lymphoma Jurkat cell line was treated with PDT using hexaminolevulinate (HAL, hexylester of ALA). Four hours following treatment nearly 80% of the cells exhibited typical apoptotic features. Mitochondrial pro-apoptotic proteins were evaluated by Western blots in subcellular fractionated samples. PDT caused cytosolic translocation of cytochrome c and nuclear redistribution of apoptosis-inducing factor (AIF), but the release of mitochondrial Smac/DIABLO, Omi/HtrA2 and EndoG was not observed. The release of cytochrome c was followed by the cleavage of caspase-9 and caspase-3 as well as its downstream substrates, together with oligonucleosomal DNA fragmentation. The pan-caspases inhibitor, z-VAD.fmk, prevented oligonucleosomal DNA fragmentation, but failed to inhibit PDT-mediated apoptosis. The apoptotic induction by AIF-mediated caspase-independent pathway was also found after HAL-PDT with large-scale DNA fragmentation in the presence of z-VAD.fmk. These results demonstrate that cytochrome c-mediated caspase-dependent pathway and AIF-induced caspase-independent pathway are simultaneously involved in the apoptotic induction by PDT. When the cytochrome c-induced caspase-dependent pathway is blocked, the cells go into apoptosis via AIF-mediated pathway, clearly demonstrating that the cytochrome c-mediated caspase-dependent pathway is not required for such apoptotic induction. This finding may have an impact on improved PDT effectiveness.

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Crossref · 10.1007/s10495-006-0190-x

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Authors
Furre, I. E., Møller, M. T. N., Shahzidi, S., Nesland, J. M., & Peng, Q.
Affiliations
Oslo University Hospital (NO)
Corresponding author
Peng, Qian
Venue
Apoptosis
Published
2006-10-10
Volume
11
Issue
11
Pages
2031-2042
ISSN
  • 1360-8185 (ISSN-L)
  • 1573-675X
OpenAlex
W2037314345
Cited by
66
References
35
Citations by year
2026: 1 · 2024: 2 · 2023: 4 · 2022: 3 · 2020: 2 · 2018: 2 · 2017: 5 · 2016: 2 · 2015: 4 · 2014: 3 · 2013: 6 · 2012: 6
FWCI
4.10
Type
journal article
Language
en
Open access
closed
Locations
  • APOPTOSIS (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Photodynamic Therapy Research Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Physical Sciences › Engineering › Biomedical Engineering › Nanoplatforms for cancer theranostics
Keywords
photodynamic therapy, hexaminolevulinate, caspase-dependent pathway, apoptosis-inducing factor, cytochrome c release, caspase-9, caspase-3, T-cell lymphoma, Jurkat cells, 5-aminolevulinic acid, mitochondrial proteins, DNA fragmentation
MeSH terms
Amino Acid Chloromethyl Ketones, Aminolevulinic Acid, Enzyme Inhibitors, Humans, Mitochondria, Photochemotherapy, Protoporphyrins, Leukemia, T-Cell, Apoptosis, Jurkat Cells, Caspases, Cytochromes c, Apoptosis Inducing Factor, Membrane Potential, Mitochondrial

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