Evidence map›Paper›PMID 32875514›Full record

ReviewInternational journal of clinical oncology2021

Key transporters leading to specific protoporphyrin IX accumulation in cancer cell following administration of aminolevulinic acid in photodynamic therapy/diagnosis.

Hung Wei Lai, Taku Nakayama, Shun-Ichiro Ogura

Abstract readReview
PubMed Publisher
In one paragraph

Review in International journal of clinical oncology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.1field-weighted citation impact, top 18% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 18 citations in OpenAlex.

  1. 5-Aminolevulinic acid (5-ALA) in paediatric brain tumour surgery-a systematic review and exploration of fluorophore alternatives.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2025
    Pooled it
  2. Review
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  5. Review
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Hung Wei LaiSchool of Life Science and Technology, Tokyo Institute of Technology, 4259 B47, Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan.
Taku NakayamaSchool of Life Science and Technology, Tokyo Institute of Technology, 4259 B47, Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan.
Shun-Ichiro OguraSchool of Life Science and Technology, Tokyo Institute of Technology, 4259 B47, Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan. sogura@bio.titech.ac.jp.ORCID http://orcid.org/0000-0002-4673-8882
Tokyo Institute of Technology · JP

Funding

Grant-in-Aid for Scientific Research (C) 18K05332
6 · The paper itself

Abstract

The administration of aminolevulinic acid allow the formation and accumulation of protoporphyrin IX specifically in cancer cells, which then lead to photocytotoxicity following light irradiation. This compound, when accumulated at high levels, could also be used in cancer diagnosis as it would emit red fluorescence when being light irradiated. The concentration of protoporphyrin IX is pivotal in ensuring the effectiveness of the therapy. Studies have been carried out and showed the importance of various transporters in regulating the amount of these substrates by controlling the transport of various related metabolites in and out of the cell. There are many transporters involved and their expression levels are dependent on various factors, such as oxygen availability and iron ions. It is also important to note that these transporters may also have different expression levels depending on their organ. Understanding the mechanisms and the roles of these transporters are essential to ensure maximum accumulation of protoporphyrin IX, leading to higher efficiency in photodynamic therapy/diagnosis. In this review, we would like to discuss the roles of various transporters in protoporphyrin IX accumulation and how their involvement directly affect cancerous microenvironment.

Indexed as

NeoplasmsPhotochemotherapyAminolevulinic AcidHumansPhotosensitizing AgentsProtoporphyrinsAminolevulinic AcidPhotosensitizing Agentsprotoporphyrin IXProtoporphyrinsAminolevulinic acidPhotodynamic diagnosisPhotodynamic therapyProtoporphyrin IXTransporters

Identifiers

PMID32875514
OpenAlexW3082703124

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.