ArticleJournal of neuro-oncology2019
Identification of PEPT2 as an important candidate molecule in 5-ALA-mediated fluorescence-guided surgery in WHO grade II/III gliomas.
Article in Journal of neuro-oncology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 10 citations in OpenAlex.
- A transcriptional network underlying migratory cellular states and reduced 5-ALA-based photodynamic detectability in glioblastoma.Molecular and clinical oncology · 2026Article
- Comparison of Fluorescent Probes for IDH-Wildtype Glioblastoma, Metastatic Brain Tumors, and PCNSL: A Biomechanical Perspective.International journal of molecular sciences · 2026Review
- Review
- 5-Aminolevulinic Acid-Induced Protoporphyrin IX Fluorescence Imaging for Tumor Detection: Recent Advances and Challenges.International journal of molecular sciences · 2022Review
- Molecular and Metabolic Mechanisms Underlying Selective 5-Aminolevulinic Acid-Induced Fluorescence in Gliomas.Cancers · 2021Review
- 5-Aminolevulinic acid for fluorescence-guided surgery in pancreatic cancer: Cellular transport and fluorescence quantification studies.Translational oncology · 2021Article
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Authors and funding
8 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purpose5-aminolevulinic acid (5-ALA) fluorescence-guided surgery (FGS) appears to be a promising treatment for glioma. However, 5-ALA-mediated fluorescence cannot always be detected in grade II/III gliomas. We hypothesized that gene expression patterns in the Protoporphyrin IX (PpIX) synthesis pathway may be associated with intraoperative fluorescence status of grade II/III gliomas, and then attempted to identify the key molecule of 5-ALA-mediated fluorescence.
methodsUsing 50 surgically obtained specimens, which were diagnosed as grade II and III gliomas, we analyzed gene expression within the PpIX synthesis pathway to identify candidate molecules according to intraoperative 5-ALA-mediated fluorescence status. The most likely candidate gene was selected and confirmed by protein expression analysis. To evaluate the biological function of the molecule in PpIX synthesis, functional analysis was performed using specific, small interference (si)RNA in the SW-1783 human grade III glioma cell line.
resultsAmong the genes involved in the porphyrin synthesis pathway, the mRNA expression of Peptide transporter 2 (PEPT2) in FGS fluorescence-positive gliomas was significantly higher than that in fluorescence-negative gliomas. Protein expression of PEPT2 was also significantly higher in the fluorescence-positive gliomas, which was confirmed by western blot analysis and immunofluorescence analysis. The siRNA-mediated downregulation of the mRNA and protein expression of PEPT2 led to decreased PpIX fluorescence intensity, as confirmed by fluorescence spectrum analysis.
conclusionsThe results suggest PEPT2 is an important candidate molecule in 5-ALA-mediated FGS in grade II/III gliomas. As the overexpression of PEPT2 was associated with higher PpIX fluorescence intensity, PEPT2 may improve fluorescence-guided resection in grade II/III gliomas.
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