Evidence map›Paper›PMID 22233416›Full record

ArticleBritish journal of pharmacology2012

Inhibition of T-type Ca²⁺ channels by endostatin attenuates human glioblastoma cell proliferation and migration.

Yuan Zhang, Junhong Zhang, Dongsheng Jiang, Dong Zhang, Zhiyuan Qian, Chunfeng Liu, Jin Tao

Open access · bronzeAbstract read
In one paragraph

Article in British journal of pharmacology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 60 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
60citing papers in PubMed, 2 pooled it
4.3field-weighted citation impact, top 5% 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

60 citing papers in PubMed, 2 syntheses or guidelines pooled it, 132 citations in OpenAlex.

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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 1 institution in 1 country.

Yuan ZhangThe Special Procurement Ward & Department of Neurology, the Second Affiliated Hospital of Soochow University, Suzhou, China.
Junhong Zhang
Dongsheng Jiang
Dong Zhang
Zhiyuan Qian
Chunfeng Liu
Jin Tao
Soochow University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

background and purposeEndostatin (ES) is a c-terminal proteolytic fragment of collagen XVIII with promising antitumour properties in several tumour models, including human glioblastoma. We hypothesized that this peptide could interact with plasma membrane ion channels and modulate their functions. EXPERIMENTAL APPROACH: Using cell proliferation and migration assays, patch clamp and Western blot analysis, we studied the effects of ES on the proliferation and migration of human glioblastoma U87 cells, mediated by T-type Ca²⁺ channels. KEY

resultsExtracellular application of ES reversibly inhibited T-type Ca²⁺ channel currents (T-currents) in U87 cells, whereas L-type Ca²⁺ currents were not affected. This inhibitory effect was associated with a hyperpolarizing shift in the voltage-dependence of inactivation but was independent of G-protein and protein tyrosine kinase-mediated pathways. All three α₁ subunits of T-type Ca²⁺ channels (Ca(V) 3), α(1G) (Ca(V) 3.1), α(1H) (Ca(V) 3.2) and α(1I) (Ca(V) 3.3), were endogenously expressed in U87 cells. Using transfected HEK293 or CHO cells, we showed that only Ca(V) 3.1 and Ca(V) 3.2, but not Ca(V) 3.3 or Ca(V) 1.2 (L-type), channel currents were significantly inhibited. More interestingly, ES inhibited the proliferation and migration of U87 cells in a dose-dependent manner. Pretreatment of the cells with the specific T-type Ca²⁺ channel blocker mibefradil occluded these inhibitory effects of ES. CONCLUSION AND IMPLICATIONS: This study provides the first evidence that the antitumour effects of ES on glioblastoma cells is through direct inhibition of T-type Ca²⁺ channels and gives new insights into the future development of a new class of antiglioblastoma agents that target the proliferation and migration of these cells.

Indexed as

Angiogenesis InhibitorsAnimalsAntineoplastic AgentsCalcium Channel BlockersCalcium Channels, T-TypeCell Line, TumorCell MovementCell ProliferationCHO CellsCricetinaeCricetulusEndostatinsGlioblastomaHEK293 CellsHumansMembrane PotentialsAngiogenesis InhibitorsAntineoplastic AgentsCACNA1G protein, humanCACNA1H protein, humanCalcium Channel BlockersCalcium Channels, T-TypeEndostatinsNeoplasm ProteinsProtein SubunitsRecombinant ProteinsRNA, Small Interfering

Identifiers

PMID22233416
PMCPMC3417444
OpenAlexW1956683296

What OpenQuestion holds

Textmetadata
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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.