Evidence map›Paper›PMID 12540549›Full record

ArticleInfection and immunity2003

Mycobacterium bovis BCG vaccines exhibit defects in alanine and serine catabolism.

Jeffrey M Chen, David C Alexander, Marcel A Behr, Jun Liu

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
0.8field-weighted citation impact, top 26% 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

29 citing papers in PubMed, 50 citations in OpenAlex.

  1. Article
  2. Characterizing the immune response toFrontiers in immunology · 2024
    Review
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Alanine dehydrogenases in mycobacteria.Journal of microbiology (Seoul, Korea) · 2019
    Review
  9. Article
  10. Article
  11. Article
  12. 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

4 authors at 2 institutions in 1 country.

Jeffrey M ChenDepartment of Medical Genetics and Microbiology, University of Toronto, Ontario M5S 1A8, Canada.
David C Alexander
Marcel A Behr
Jun Liu
University of Toronto · CAMontreal General Hospital · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Mycobacterium bovis BCG is the only accepted vaccine for the prevention of tuberculosis (TB) in humans. BCG is a live vaccine, and induction of immunity to TB requires productive infection of the host by BCG. However, BCG is not a satisfactory vaccine, because it fails to protect against pulmonary TB in adults. In this study, we found that BCG strains cannot utilize many naturally occurring amino acids as the sole nitrogen source for growth. This defect is caused, at least partially, by the lack of functional metabolic enzymes. All BCG strains are unable to catabolize L-alanine or D-alanine due to a frameshift mutation in the L-alanine dehydrogenase gene (ald). Some BCG strains, such as BCG-Pasteur and BCG-Frappier, cannot catabolize L-serine, apparently due to inadequate expression of L-serine deaminase (sdaA). We also found that undegraded alanine and serine inhibit the growth of BCG through blockage of glutamine synthetase. These results suggest that BCG strains are limited in nitrogen metabolic capacity and predict defects that may restrict multiplication and persistence of the live vaccine within the host.

Indexed as

BCG VaccineAlanineAlanine DehydrogenaseAmino Acid OxidoreductasesAnimalsCattleCulture MediaFrameshift MutationGlutamate-Ammonia LigaseL-Serine DehydrataseMolecular Sequence DataMycobacterium bovisSerineAlanineAlanine DehydrogenaseAmino Acid OxidoreductasesBCG VaccineCulture MediaGlutamate-Ammonia LigaseL-Serine DehydrataseSerine

Identifiers

PMID12540549
PMCPMC145370
OpenAlexW2108014318

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.