Evidence map›Paper›PMID 21436868›Full record

ArticleCancer gene therapy2011

In tumors Salmonella migrate away from vasculature toward the transition zone and induce apoptosis.

S Ganai, R B Arenas, J P Sauer, B Bentley, N S Forbes

Abstract read
In one paragraph

Article in Cancer gene therapy, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 94 papers.

0numbers the graph read from it
0cells of the map it votes in
94citing papers in PubMed
6.8field-weighted citation impact, top 3% 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

94 citing papers in PubMed, 185 citations in OpenAlex.

  1. Deletion of themBio · 2026
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  6. Optimization Strategies and Synergistic Applications of EngineeredInternational journal of nanomedicine · 2026
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  7. Biomedicines · 2025
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  19. Exploiting bacteria for cancer immunotherapy.Nature reviews. Clinical oncology · 2024
    Review
  20. Article

34 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

5 authors at 4 institutions in 1 country.

S GanaiDepartment of Surgery, Baystate Medical Center, Tufts University School of Medicine, Springfield, MA, USA.
R B Arenas
J P Sauer
B Bentley
N S Forbes
Pioneer (United States) · USBaystate Medical Center · USTufts University · USUniversity of Massachusetts Amherst · US

Funding

Engineering Salmonella to be a targeted intratumoral anti-cancer therapeuticR01CA120825 · NCI · UNIVERSITY OF MASSACHUSETTS AMHERST · PI FORBES, NEIL S. · 2008 to 2011
$1.2M
NCI NIH HHS 1R01CA120825-01A1NCI NIH HHS R01 CA120825
6 · The paper itself

Abstract

Motile bacteria can overcome diffusion resistances that substantially reduce the efficacy of standard cancer therapies. Many reports have also recently described the ability of Salmonella to deliver therapeutic molecules to tumors. Despite this potential, little is known about the spatiotemporal dynamics of bacterial accumulation in solid tumors. Ultimately this timing will affect how these microbes are used therapeutically. To determine how bacteria localize, we intravenously injected Salmonella typhimurium into BALB/c mice with 4T1 mammary carcinoma and measured the average bacterial content as a function of time. Immunohistochemistry was used to measure the extent of apoptosis, the average distance of bacteria from tumor vasculature and the location of bacteria in four different regions: the core, transition, body and edge. Bacteria accumulation was also measured in pulmonary and hepatic metastases. The doubling time of bacterial colonies in tumors was measured to be 16.8 h, and colonization was determined to delay tumor growth by 48 h. From 12 and 48 h after injection, the average distance between bacterial colonies and functional vasculature significantly increased from 130 to 310 μm. After 48 h, bacteria migrated away from the tumor edge toward the central core and induced apoptosis. After 96 h, bacteria began to marginate to the tumor transition zone. All observed metastases contained Salmonella and the extent of bacterial colocalization with metastatic tissue was 44% compared with 0.5% with normal liver parenchyma. These results demonstrate that Salmonella can penetrate tumor tissue and can selectively target metastases, two critical characteristics of a targeted cancer therapeutic.

Indexed as

AnimalsApoptosisCell Line, TumorFemaleHumansImmunohistochemistryMammary Neoplasms, AnimalMiceMice, Inbred BALB CNeoplasmsSalmonellaSalmonella typhimurium

Identifiers

PMID21436868
PMCPMC3117926
OpenAlexW2132386078

What OpenQuestion holds

Textmetadata
LicenceTDM
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.