Evidence map›Paper›PMID 18971416›Full record

ArticleNeuro-oncology2009

Differential effect of sunitinib on the distribution of temozolomide in an orthotopic glioma model.

Qingyu Zhou, James M Gallo

Open access · bronzeAbstract read
In one paragraph

Article in Neuro-oncology, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed
2.8field-weighted citation impact, top 10% 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

45 citing papers in PubMed, 91 citations in OpenAlex.

  1. Trial
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  3. Detecting vascular normalization in epithelial ovarian cancer.Medical oncology (Northwood, London, England) · 2025
    Review
  4. Article
  5. Article
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  12. Guanabenz Sensitizes Glioblastoma Cells to Sunitinib by Inhibiting GADD34-Mediated Autophagic Signaling.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2021
    Article
  13. Article
  14. Article
  15. Review
  16. 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

2 authors at 1 institution in 1 country.

Qingyu ZhouDepartment of Pharmaceutical Sciences, Temple University, Philadelphia, PA 19140, USA.
James M Gallo
Temple University · US

Funding

INTERACTIONS BETWEEN CYTOTOXIC AND ANTIANGIOGENIC DRUGSR01CA072937 · NCI · TEMPLE UNIV OF THE COMMONWEALTH · PI GALLO, JAMES M. · 1998 to 2015
$2.3M
NCI NIH HHS CA72937NCI NIH HHS R01 CA072937
6 · The paper itself

Abstract

Normalization of tumor vasculature by antiangiogenic agents may improve the delivery of cytotoxic drugs to the tumor, leading to more effective therapy. In this study, we used pharmacokinetic and pharmacodynamic approaches to investigate how sunitinib at different dose levels affects brain distribution of temozolomide (TMZ), and to ascertain the relationship between intratumoral TMZ concentrations and tumor vascularity in an orthotopic human glioma model. Three groups of intracerebral U87MG tumor-bearing mice were given either vehicle or sunitinib at 20 mg/kg or 60 mg/kg per day for 7 days before receiving a steady-state regimen of TMZ that consisted of an intravenous bolus and a 3-h intraarterial infusion. TMZ concentrations in plasma, normal brain, and brain tumor were determined, and several biomarkers related to the antiangiogenic activity of sunitinib were examined. TMZ distribution in the normal brain as indicated by the brain-to-plasma steady-state TMZ concentration ratios was analogous across the three treatment groups. The brain tumor-to-plasma steady-state TMZ concentration (ss C(t)/C(p)) ratio was significantly increased in the 20 mg/kg sunitinib group (0.98 +/- 0.17) compared with the control (0.76 +/- 0.17) and 60 mg/kg sunitinib (0.68 +/- 0.09) groups. The ss C(t)/C(p) ratios were significantly correlated with the vascular normalization index (VNI), derived from the expression of CD31, collagen IV, and alpha-smooth muscle actin, which represents the fraction of functioning vessels out of the total tumor vessels. In conclusion, the effect of sunitinib on the brain tumor distribution of TMZ was dose dependent and indicated that optimal tumor exposure was achieved at a lower dose and was associated with the VNI.

Indexed as

Angiogenesis InhibitorsAnimalsAntineoplastic AgentsBrain NeoplasmsDacarbazineDrug InteractionsGliomaHumansImmunohistochemistryIndolesIn Situ Nick-End LabelingMaleMiceMice, NudePyrrolesSunitinibAngiogenesis InhibitorsAntineoplastic AgentsDacarbazineIndolesPyrrolesSunitinibTemozolomide

Identifiers

PMID18971416
PMCPMC2718974
OpenAlexW2117530284

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.