Evidence map›Paper›PMID 16775223›Full record

ArticleNeuro-oncology2006

Therapeutic implications of tumor interstitial fluid pressure in subcutaneous RG-2 tumors.

Yot Navalitloha, Erica S Schwartz, Elizabeth N Groothuis, Cathleen V Allen, Robert M Levy, Dennis R Groothuis

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in Neuro-oncology, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
1.4field-weighted citation impact, top 17% 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

23 citing papers in PubMed, 62 citations in OpenAlex.

  1. Review
  2. The glymphatic system and glioblastoma.Brain : a journal of neurology · 2026
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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

6 authors at 1 institution in 1 country.

Yot NavalitlohaDepartment of Neurology, Northwestern University Medical School, Evanston Northwestern Healthcare, IL 60201, USA.
Erica S Schwartz
Elizabeth N Groothuis
Cathleen V Allen
Robert M Levy
Dennis R Groothuis
Northwestern University · US

Funding

PHARMACOKINETICS OF DRUG DELIVERY TO BRAIN TUMORS BY NMRR01NS012745 · NINDS · EVANSTON HOSPITAL · PI GROOTHUIS, DENNIS R · 1985 to 2000
$201k
NINDS NIH HHS R01-NS12745
6 · The paper itself

Abstract

Increased interstitial fluid pressure (IFP) in brain tumors results in rapid removal of drugs from tumor extracellular space. We studied the effects of dexamethasone and hypothermia on IFP in s.c. RG-2 rat gliomas, because they could potentially be useful as means of maintaining drug concentrations in human brain tumors. We used dexamethasone, external hypothermia, combined dexamethasone and hypothermia, and infusions of room temperature saline versus chilled saline. We measured tumor IFP and efflux half-time of 14C-sucrose from tumors. In untreated s.c. tumors, IFP was 9.1 +/- 2.1 mmHg, tumor temperature was 33.7 degrees C +/- 0.7 degrees C, and efflux half-time was 7.3 +/- 0.7 min. Externally induced hypothermia decreased tumor temperature to 8.9 degrees C +/- 2.9 degrees C, tumor IFP decreased to 3.2 +/- 1.1 mmHg, and efflux half-time increased to 13.5 min. Dexamethasone decreased IFP to 2.4 +/- 1.0 mmHg and increased efflux half-time to 15.4 min. Combined hypothermia and dexamethasone further increased the efflux half-time to 17.6 min. We tried to lower the tumor temperature by chilling the infusion solution, but at an infusion rate of 48 mul/min, the efflux rate was the same for room temperature saline and 15 degrees C saline. The efflux rate was increased in both infusion groups, which suggests that efflux due to tumor IFP and that of the infusate were additive. Since lowering tumor IFP decreases efflux from brain tumors, it provides a means to increase drug residence time, which in turn increases the time-concentration exposure product of therapeutic drug available to tumor.

Indexed as

AnimalsDexamethasoneExtracellular FluidGliomaHypothermia, InducedNeoplasms, ExperimentalPressureRatsRats, Inbred F344Xenograft Model Antitumor AssaysDexamethasone

Identifiers

PMID16775223
PMCPMC1871948
OpenAlexW2142454469

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.