Evidence map›Paper›PMID 18479884›Full record

ArticleMicrobial pathogenesis2008

Verification and dissection of the ospC operator by using flaB promoter as a reporter in Borrelia burgdorferi.

Qilong Xu, Kristy McShan, Fang Ting Liang

Abstract read
In one paragraph

Article in Microbial pathogenesis, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.0field-weighted citation impact, top 16% 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

17 citing papers in PubMed, 21 citations in OpenAlex.

  1. Review
  2. Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Adhesion mechanisms of Borrelia burgdorferi.Advances in experimental medicine and biology · 2011
    Review
  11. lacZ reporter system for use in Borrelia burgdorferi.Applied and environmental microbiology · 2010
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. 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

3 authors at 1 institution in 1 country.

Qilong XuDepartment of Pathobiological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
Kristy McShan
Fang Ting Liang
Louisiana State University · US

Funding

TNF AND MCP-1 IN RETROVIRUS-INDUCED BRAIN DISEASEP20RR020159 · NCRR · LOUISIANA STATE UNIV A&M COL BATON ROUGE · PI PAHAR, BAPI · 2004 to 2011
$16.1M
Lipoprotein expresion and adaptation of B. burgdorferiK01AR049405 · NIAMS · YALE UNIVERSITY · PI LIANG, FANG-TING · 2003 to 2007
$605k
Lyme arthritis virulence of Borrelia burgdorferiR03AR053338 · NIAMS · LOUISIANA STATE UNIV A&M COL BATON ROUGE · PI LIANG, FANG-TING · 2006 to 2008
$215k
NCRR NIH HHS P20 RR020159NCRR NIH HHS P20RR020159NIAMS NIH HHS K01 AR049405NIAMS NIH HHS R03 AR053338
6 · The paper itself

Abstract

The Lyme disease spirochete Borrelia burgdorferi must repress expression of outer surface protein C (OspC) to effectively evade specific humoral immunity and to establish persistent infection. This ability largely relies upon a regulatory element, the only operator that has been reported in spirochetal bacteria. Immediately upstream of the ospC promoter, two sets of inverted repeats (IRs) constitute small and large palindromes, in which the right IR of the large palindrome contains the left IR of the small one, and may collectively function as the ospC operator. In the study, the large palindrome with or without the small IR was fused with an flaB promoter, which was used to drive expression of a promoterless ospC copy as a reporter gene, and introduced into OspC-deficient B. burgdorferi. The presence of the large palindrome alone significantly reduced ospC expression driven by the fused flaB promoter in the joint tissue of severe combined immunodeficiency (SCID) mice, and rescued spirochetes from elimination by passively transferred OspC antibody in infected SCID mice and specific immune responses elicited in immunocompetent mice, confirming a function of the IRs as an operator. Inclusion of the small IR further enhanced the ability of the large palindrome to reduce the activity of the fused flaB promoter, indicating that the small IR is a part of the operator. Taken together, the study led to successful verification and dissection of the ospC operator.

Indexed as

Gene Expression Regulation, BacterialOperator Regions, GeneticPromoter Regions, GeneticAnimalsAntigens, BacterialBacterial Outer Membrane ProteinsBase SequenceBorrelia burgdorferiFlagellinGenes, ReporterHumansLyme DiseaseMiceMice, SCIDMolecular Sequence DataRepetitive Sequences, Nucleic AcidAntigens, BacterialBacterial Outer Membrane ProteinsflaB flagellinFlagellinOspC protein

Identifiers

PMID18479884
PMCPMC2497006
OpenAlexW2032394689

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.