Evidence map›Paper›PMID 26081429›Full record

ArticleMolecular cancer2015

Targeting PBK/TOPK decreases growth and survival of glioma initiating cells in vitro and attenuates tumor growth in vivo.

Mrinal Joel, Awais A Mughal, Zanina Grieg, Wayne Murrell, Sheryl Palmero, Birthe Mikkelsen, Hege B Fjerdingstad, Cecilie J Sandberg, Jinan Behnan, Joel C Glover and 2 more

Open access · goldAbstract read
In one paragraph

Article in Molecular cancer, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 66 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed, 1 pooled it
4.8field-weighted citation impact, top 4% 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

66 citing papers in PubMed, 1 synthesis or guideline pooled it, 100 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Review
  5. Targeting PBK with small-molecule 1-Proceedings of the National Academy of Sciences of the United States of America · 2025
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  8. Review
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  16. Specific Regulation of mGenomics, proteomics & bioinformatics · 2023
    Article
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  18. Review
  19. Article
  20. Article

6 more citing papers are in PubMed but not listed here.

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

12 authors at 2 institutions in 1 country.

Mrinal JoelVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. mrinaj@medisin.uio.no.
Awais A MughalVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. awaismu@rr.research.no.
Zanina GriegVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. zanina_grieg@yahoo.no.
Wayne MurrellVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. wayne.murrell@rr-research.no.
Sheryl PalmeroVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. sheryl_palmero@hotmail.com.
Birthe MikkelsenVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. Birthe.Mikkelsen@rr-research.no.
Hege B FjerdingstadLaboratory of Neural Development and Optical Recording (NDEVOR), Department of Physiology, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway. Hege.Fjerdingstad@rr-research.no.
Cecilie J SandbergVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. cesandbe@medisin.uio.no.
Jinan BehnanVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. jinan_bahnan@hotmail.com.
Joel C GloverLaboratory of Neural Development and Optical Recording (NDEVOR), Department of Physiology, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway. joel.glover@medisin.uio.no.
Iver A LangmoenVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. i.a.langmoen@medisin.uio.no.
Biljana StangelandVilhelm Magnus Laboratory for Neurosurgical Research, Department of Neurosurgery and Institute of Surgical Research, Oslo University Hospital, Oslo, Norway. biljana.stangeland@labmed.uio.no.
Oslo University Hospital · NOUniversity of Oslo · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGlioblastomas are invasive therapy resistant brain tumors with extremely poor prognosis. The Glioma initiating cell (GIC) population contributes to therapeutic resistance and tumor recurrence. Targeting GIC-associated gene candidates could significantly impact GBM tumorigenicity. Here, we investigate a protein kinase, PBK/TOPK as a candidate for regulating growth, survival and in vivo tumorigenicity of GICs.

methodsPBK is highly upregulated in GICs and GBM tissues as shown by RNA and protein analyses. We knocked down PBK using shRNA vectors and inhibited the function of PBK protein with a pharmacological PBK inhibitor, HITOPK-032. We assessed viability, tumorsphere formation and apoptosis in three patient derived GIC cultures.

resultsGene knockdown of PBK led to decreased viability and sphere formation and in one culture an increase in apoptosis. Treatment of cells with inhibitor HITOPK-032 (5 μM and 10 μM) almost completely abolished growth and elicited a large increase in apoptosis in all three cultures. HI-TOPK-032 treatment (5 mg/kg and 10 mg/kg bodyweight) in vivo resulted in diminished growth of experimentally induced subcutaneous GBM tumors in mice. We also carried out multi-culture assays of cell survival to investigate the relative effects on GICs compared with the normal neural stem cells (NSCs) and their differentiated counterparts. Normal NSCs seemed to withstand treatment slightly better than the GICs.

conclusionOur study of identification and functional validation of PBK suggests that this candidate can be a promising molecular target for GBM treatment.

Indexed as

AnimalsApoptosisCell Line, TumorCell ProliferationCell SurvivalDisease Models, AnimalExtracellular Signal-Regulated MAP KinasesGene Knockdown TechniquesGlioblastomaHumansIndolizinesMiceMitogen-Activated Protein Kinase KinasesNeoplastic Stem Cellsp38 Mitogen-Activated Protein KinasesProtein Kinase InhibitorsExtracellular Signal-Regulated MAP KinasesIndolizinesMitogen-Activated Protein Kinase KinasesN-(12-cyanoindolizino(2,3-b)quinoxalin-2-yl)thiophene-2-carboxamidep38 Mitogen-Activated Protein KinasesPDZ-binding kinaseProtein Kinase InhibitorsQuinoxalinesRNA, Small Interfering

Identifiers

PMID26081429
PMCPMC4470057
OpenAlexW2099463987

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.