Evidence map›Paper›PMID 19198972›Full record

ArticleLasers in medical science2009

Intracellular free calcium mediates glioma cell detachment and cytotoxicity after photodynamic therapy.

Xin Hong, Feng Jiang, Steven N Kalkanis, Zheng Gang Zhang, Xuepeng Zhang, Xuguang Zheng, Hao Jiang, Michael Chopp

Open access · greenAbstract read
In one paragraph

Article in Lasers in medical science, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing papers in PubMed
1.0field-weighted citation impact, top 22% 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

10 citing papers in PubMed, 25 citations in OpenAlex.

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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

8 authors at 2 institutions in 2 countries.

Xin HongDepartment of Neurosurgery, Henry Ford Hospital, Detroit, MI 48202, USA.
Feng Jiang
Steven N Kalkanis
Zheng Gang Zhang
Xuepeng Zhang
Xuguang Zheng
Hao Jiang
Michael Chopp
Henry Ford Hospital · USNorth China University of Science and Technology · CN

Funding

VERTERINARY PROJECTP01CA043892 · NCI · UNIVERSITY OF COLORADO DENVER · PI HETZEL, FRED W · 1987 to 2008
$9.9M
Glioma-Treatment with PDT and Anti-Angiogenic AgentsR01CA100486 · NCI · HENRY FORD HEALTH SYSTEM · PI JIANG, FENG · 2004 to 2007
$1.0M
NCI NIH HHS P01 CA043892NCI NIH HHS R01 CA100486
6 · The paper itself

Abstract

Photofrin photodynamic therapy (PDT) caused a dose-dependent decrease of enzymatic cell detachment by trypsin/ethylenediamine tetra-acetic acid (EDTA) in human glioma U251n and U87 cells. This happened coincidently with the increase of intracellular free calcium ([Ca(2+)](i)). Thapsigargin, which increased [Ca(2+)](i), induced further decrease in enzymatic cell detachment and increased cytotoxicity. Opposite effects were observed when 1,2-bis(2-aminophenoxy) ethane-N,N,N',N'-tetra-acetic acid tetrakis, an intracellular Ca(2+) chelator, was used. PDT-induced changes in [Ca(2+)](i) and cell detachment were not blocked by calcium channel antagonists nickel (Ni(2+)) or nimodipine, nor were they altered when cells were irradiated in a buffer free from Ca(2+) and magnesium (Mg(2+)), suggesting that [Ca(2+)](i) is derived from the internal calcium stores. Decreased cell migration was observed after PDT, as assessed by chemotactic and wound-healing assays. Our findings indicated that internal calcium store-derived [Ca(2+)](i) plays an important role in PDT-induced enzymatic cell detachment decrease and cytotoxicity. Cell migration may be affected by these changes.

Indexed as

PhotochemotherapyCalciumCell AdhesionCell Line, TumorCell MovementDihematoporphyrin EtherEgtazic AcidGliomaHumansPhotosensitizing AgentsThapsigargin1,2-bis(2-aminophenoxy)ethane N,N,N',N'-tetraacetic acid acetoxymethyl esterCalciumDihematoporphyrin EtherEgtazic AcidPhotosensitizing AgentsThapsigargin

Identifiers

PMID19198972
PMCPMC2746241
OpenAlexW2003529105

What OpenQuestion holds

Textmetadata
LicenceTDM
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.