Evidence map›Paper›PMID 11953383›Full record

ArticleInfection and immunity2002

Diversity of the metalloprotease toxin produced by enterotoxigenic Bacteroides fragilis.

Shaoguang Wu, Lawrence A Dreyfus, Art O Tzianabos, Chika Hayashi, Cynthia L Sears

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
1.2field-weighted citation impact, top 23% 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

31 citing papers in PubMed, 44 citations in OpenAlex.

  1. Orally available designed miniproteins inhibit enterotoxigenicbioRxiv : the preprint server for biology · 2026
    Article
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Which bacterial toxins are worthy of validation as markers in colorectal cancer screening? A critical review.Biomedical papers of the Medical Faculty of the University Palacky, Olomouc, Czechoslovakia · 2022
    Review
  9. The emerging role of the microbiome in Alzheimer's disease.International review of neurobiology · 2022
    Article
  10. Article
  11. Role of gut microbiota in epigenetic regulation of colorectal Cancer.Biochimica et biophysica acta. Reviews on cancer · 2021
    Review
  12. Glucosylceramide production maintains colon integrity in response to Bacteroides fragilis toxin-induced colon epithelial cell signaling.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2020
    Article
  13. Article
  14. Review
  15. Article
  16. Suppression of colorectal tumorigenesis by recombinantWorld journal of gastroenterology · 2017
    Article
  17. Article
  18. Review
  19. Polyamine catabolism contributes to enterotoxigenic Bacteroides fragilis-induced colon tumorigenesis.Proceedings of the National Academy of Sciences of the United States of America · 2011
    Article
  20. Article
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.

Shaoguang WuDivision of Infectious Diseases, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
Lawrence A Dreyfus
Art O Tzianabos
Chika Hayashi
Cynthia L Sears
Office of Infectious Diseases · USHarvard University · USJohns Hopkins University · USUniversity of Missouri–Kansas City · US

Funding

PHYSIOLOGY AND CLONING OF B FRAGILIS ENTEROTOXINR01DK045496 · NIDDK · JOHNS HOPKINS UNIVERSITY · PI SEARS, CYNTHIA · 1993 to 2010
$3.6M
NIDDK NIH HHS DK 45496NIDDK NIH HHS R01 DK045496
6 · The paper itself

Abstract

Enterotoxigenic Bacteroides fragilis (ETBF) strains produce a 20-kDa zinc metalloprotease toxin (BFT) associated with diarrheal disease of animals, young children, and adults. BFT stimulates secretion in intestinal loops in vivo and modifies epithelial cell morphology in vitro. The B. fragilis toxin (bft) gene from ETBF strain 86-5443-2-2 (piglet; bft-2) revealed significant nucleotide and predicted amino acid differences when compared to the bft gene from ETBF strain VPI 13784 (lamb; bft-1). This study compares BFT-1 and BFT-2, respectively, produced by ETBF strains VPI 13784 and 86-5443-2-2 purified using the Van Tassell method (38) and a modified purification scheme described herein. Multiple differences in the protein toxins produced by these ETBF strains were identified. First, purified BFT-1 eluted from a high-resolution anion-exchange column (Mono Q) at 0.22 +/- 0.005 M NaC1 versus 0.18 +/- 0.001 M NaC1 for BFT-2 (P < 0.001). Second, BFT-1 and BFT-2 exhibited different electrophoretic mobilities on sodium dodecyl sulfate-polyacrylamide gel electrophoresis and reverse-phase fast protein liquid chromatography. Third, each BFT reacted with greater specificity to homologous rather than heterologous antisera. Fourth, BFT-2 had modest, but consistently, greater biological activity than BFT-1 when tested on HT29/C1 cells (P < or = 0.01). Together, these data indicate that these ETBF strains produce two distinct isotypes of BFT, termed BFT-1 (VPI 13784 BFT) and BFT-2 (86-5443-2-2 BFT) to recognize the order in which the proteins were purified and genetic sequences identified. The modified purification scheme described in this report yields about two to three times more purified BFT protein than previous protocols and is less time consuming.

Indexed as

Bacterial ToxinsBacteroides fragilisChromatography, Ion ExchangeElectrophoresis, Polyacrylamide GelHT29 CellsHumansImmunoblottingMetalloendopeptidasesBacterial ToxinsBacteroides fragilis toxinMetalloendopeptidases

Identifiers

PMID11953383
PMCPMC127897
OpenAlexW2122208362

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.