Evidence map›Paper›PMID 21558073›Full record

ArticleNeuro-oncology2011

Siomycin A targets brain tumor stem cells partially through a MELK-mediated pathway.

Ichiro Nakano, Kaushal Joshi, Koppany Visnyei, Bin Hu, Momoko Watanabe, Diana Lam, Eric Wexler, Kuniyasu Saigusa, Yuko Nakamura, Dan R Laks and 3 more

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Neuro-oncology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
3.3field-weighted citation impact, top 7% 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

38 citing papers in PubMed, 59 citations in OpenAlex.

  1. Review
  2. Article
  3. Targeting MELK in tumor cells and tumor microenvironment: from function and mechanism to therapeutic application.Clinical & translational oncology : official publication of the Federation of Spanish Oncology Societies and of the National Cancer Institute of Mexico · 2025
    Review
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  16. Senescence from glioma stem cell differentiation promotes tumor growth.Biochemical and biophysical research communications · 2016
    Article
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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

13 authors at 3 institutions in 1 country.

Ichiro NakanoDepartment of Neurological Surgery, James Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA. ichiro.nakano@osumc.edu
Kaushal Joshi
Koppany Visnyei
Bin Hu
Momoko Watanabe
Diana Lam
Eric Wexler
Kuniyasu Saigusa
Yuko Nakamura
Dan R Laks
Paul S Mischel
Mariano Viapiano
Harley I Kornblum
Neurological Surgery · USThe Ohio State University · USThe Ohio State University Wexner Medical Center · US

Funding

Neural Progenitor Genes and Brain TumorsR01NS052563 · NINDS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI KORNBLUM, HARLEY IAN · 2006 to 2015
$2.4M
Targeting the Tumor Matrix as Anti-Invasive and Sensitizing Strategy for GliomaR01CA152065 · NCI · OHIO STATE UNIVERSITY · PI VIAPIANO, MARIANO SEBASTIAN · 2010 to 2014
$1.3M
NCI NIH HHS R01 CA152065NINDS NIH HHS R01 NS052563
6 · The paper itself

Abstract

Glioblastoma multiforme (GBM) is a devastating disease, and the current therapies have only palliative effect. Evidence is mounting to indicate that brain tumor stem cells (BTSCs) are a minority of tumor cells that are responsible for cancer initiation, propagation, and maintenance. Therapies that fail to eradicate BTSCs may ultimately lead to regrowth of residual BTSCs. However, BTSCs are relatively resistant to the current treatments. Development of novel therapeutic strategies that effectively eradicate BTSC are, therefore, essential. In a previous study, we used patient-derived GBM sphere cells (stemlike GBM cells) to enrich for BTSC and identified maternal embryonic leucine-zipper kinase (MELK) as a key regulator of survival of stemlike GBM cells in vitro. Here, we demonstrate that a thiazole antibiotic, siomycin A, potently reduced MELK expression and inhibited tumor growth in vivo. Treatment of stemlike GBM cells with siomycin A resulted in arrested self-renewal, decreased invasion, and induced apoptosis but had little effect on growth of the nonstem cells of matched tumors or normal neural stem/progenitor cells. MELK overexpression partially rescued the phenotype of siomycin A-treated stemlike GBM cells. In vivo, siomycin A pretreatment abraded the sizes of stemlike GBM cell-derived tumors in immunodeficient mice. Treatment with siomycin A of mice harboring intracranial tumors significantly prolonged their survival period compared with the control mice. Together, this study may be the first model to partially target stemlike GBM cells through a MELK-mediated pathway with siomycin A to pave the way for effective treatment of GBM.

Indexed as

AnimalsApoptosisBlotting, WesternBrainBrain NeoplasmsCell AdhesionCell MovementCell ProliferationFlow CytometryGene Expression Regulation, NeoplasticGlioblastomaHumansImmunoenzyme TechniquesMiceMice, Inbred NODMice, SCIDMELK protein, humanMelk protein, mousePeptidesProtein Serine-Threonine KinasesRNA, Messengersiomycin A

Identifiers

PMID21558073
PMCPMC3107094
OpenAlexW2151309564

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.