Evidence map›Paper›PMID 22470120›Full record

ArticleAntimicrobial agents and chemotherapy2012

Evaluation of a mouse model of necrotic granuloma formation using C3HeB/FeJ mice for testing of drugs against Mycobacterium tuberculosis.

Emily R Driver, Gavin J Ryan, Donald R Hoff, Scott M Irwin, Randall J Basaraba, Igor Kramnik, Anne J Lenaerts

Abstract read
In one paragraph

Article in Antimicrobial agents and chemotherapy, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 175 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
175citing papers in PubMed, 1 pooled it
8.7field-weighted citation impact, top 1% 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

175 citing papers in PubMed, 1 synthesis or guideline pooled it, 271 citations in OpenAlex.

  1. Pooled it
  2. Article
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  20. Review

115 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

7 authors at 2 institutions in 1 country.

Emily R DriverMycobacterial Research Laboratories, Department of Microbiology, Colorado State University, Fort Collins, Colorado, USA.
Gavin J Ryan
Donald R Hoff
Scott M Irwin
Randall J Basaraba
Igor Kramnik
Anne J Lenaerts
Colorado State University · USBoston University · US

Funding

ANIMAL MODEL TESTING OF TB DRUGSN01AI095385 · NIAID · COLORADO STATE UNIVERSITY-FORT COLLINS · PI ORME, IAN M · 1999 to 2000
$446k
NIAID NIH HHS N01 AI095385NIAID NIH HHS N01 AI-95385
6 · The paper itself

Abstract

Persistence of Mycobacterium tuberculosis remains a significant challenge for the effective treatment of tuberculosis in humans. In animals that develop necrotic lung lesions following infection with M. tuberculosis, drug-tolerant bacilli are present and persist in an extracellular microenvironment within the necrotic cores. In this study, we examined the efficacy of drug treatment in C3HeB/FeJ (Kramnik) mice that develop lesions with liquefactive necrosis, in comparison to BALB/c mice that develop nonnecrotic lesions following aerosol challenge. To accomplish this, Kramnik and BALB/c mice were infected by aerosol with M. tuberculosis and treated for 7 to 8 weeks with monotherapy using drugs with different modes of action. The efficacy of drug therapy was quantified by enumeration of bacterial load. The progression of disease and location and distribution of bacilli within lesions were visualized using various staining techniques. In the late stages of infection, Kramnik mice developed fibrous encapsulated lung lesions with central liquefactive necrosis containing abundant extracellular bacilli, whereas BALB/c mice formed nonnecrotic lesions with primarily intracellular bacilli. Necrotic lesions in Kramnik mice showed evidence of hypoxia by pimonidazole staining. Kramnik mice were significantly more refractory to drug therapy, especially for pyrazinamide. Metronidazole showed no bactericidal activity in either model. There were significantly higher numbers of drug-resistant colonies isolated from the Kramnik mice compared to BALB/c mice. These results suggest that the Kramnik mouse model will be a valuable model to test antituberculosis drugs, especially against bacilli that persist within necrotic lesions.

Indexed as

AnimalsAntitubercular AgentsDisease Models, AnimalGranulomaMetronidazoleMiceMice, Inbred BALB CMycobacterium tuberculosisPyrazinamideAntitubercular AgentsMetronidazolePyrazinamide

Identifiers

PMID22470120
PMCPMC3370740
OpenAlexW1970610212

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.