Evidence map›Paper›PMID 16177346›Full record

ArticleInfection and immunity2005

A metalloproteinase of Coccidioides posadasii contributes to evasion of host detection.

Chiung-Yu Hung, Kalpathi R Seshan, Jieh-Juen Yu, Ruth Schaller, Jianmin Xue, Venkatesha Basrur, Malcolm J Gardner, Garry T Cole

Open access · greenAbstract read
In one paragraph

Article in Infection and immunity, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 65 papers.

0numbers the graph read from it
0cells of the map it votes in
65citing papers in PubMed
3.4field-weighted citation impact, top 8% 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

65 citing papers in PubMed, 115 citations in OpenAlex.

  1. Article
  2. Review
  3. Computational Approaches for Discovering Virulence Factors inJournal of fungi (Basel, Switzerland) · 2025
    Review
  4. Early immune response toMicrobiology spectrum · 2025
    Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Antifungal Innate Immunity.Advances in experimental medicine and biology · 2025
    Review
  10. Article
  11. Article
  12. Review
  13. Journal of fungi (Basel, Switzerland) · 2024
    Article
  14. Review
  15. Coccidioides Species: A Review of Basic Research: 2022.Journal of fungi (Basel, Switzerland) · 2022
    Review
  16. Article
  17. Review
  18. Two Novel Dimorphism-Related Virulence Factors ofInternational journal of molecular sciences · 2021
    Article
  19. Article
  20. Article

5 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

8 authors at 1 institution in 1 country.

Chiung-Yu HungDepartment of Medical Microbiology and Immunology, Medical College of Ohio, Toledo, 43614-5806, USA.
Kalpathi R Seshan
Jieh-Juen Yu
Ruth Schaller
Jianmin Xue
Venkatesha Basrur
Malcolm J Gardner
Garry T Cole
University of Toledo Medical Center · US

Funding

Coccidiodes immitis Genome Sequencing ProjectU01AI050910 · NIAID · INSTITUTE FOR GENOMIC RESEARCH · PI GARDNER, MALCOLM JOHN · 2001 to 2002
$2.9M
SCREENING FOR C. IMMITIS ANTIGENS BY DNA IMMUNIZATIONP01AI037232 · NIAID · VETERANS MEDICAL RESEARCH FDN/SAN DIEGO · PI KIRKLAND, THEO N · 1995 to 2003
$2.6M
IMMUNOREACTIVE MACROMOLECULES OF COCCIDIOIDES CELL TYPESR01AI019149 · NIAID · UNIVERSITY OF TOLEDO HEALTH SCI CAMPUS · PI COLE, GARRY THOMAS · 1986 to 2006
$2.2M
IMMUNOREACTIVE MACROMOLECULES OF COCCIDIOIDES CELL TYPESR37AI019149 · NIAID · UNIVERSITY OF TOLEDO HEALTH SCI CAMPUS · PI COLE, GARRY THOMAS · 1992 to 2001
$894k
NIAID NIH HHS AI19149NIAID NIH HHS AI37232NIAID NIH HHS P01 AI037232NIAID NIH HHS R01 AI019149NIAID NIH HHS R37 AI019149NIAID NIH HHS U01 AI050910NIAID NIH HHS U01-AI50910
6 · The paper itself

Abstract

Coccidioides posadasii is a fungal respiratory pathogen of humans that can cause disease in immunocompetent individuals. Coccidioidomycosis ranges from a mild to a severe infection. It is frequently characterized either as a persistent disease that requires months to resolve or as an essentially asymptomatic infection that can reactivate several years after the original insult. In this report we describe a mechanism by which the pathogen evades host detection during the pivotal reproductive (endosporulation) phase of the parasitic cycle. A metalloproteinase (Mep1) secreted during endospore differentiation digests an immunodominant cell surface antigen (SOWgp) and prevents host recognition of endospores during the phase of development when these fungal cells are most vulnerable to phagocytic cell defenses. C57BL/6 mice were immunized with recombinant SOWgp and then challenged with a mutant strain of C. posadasii in which the MEP1 gene was disrupted. The animals showed a significant increase in percent survival compared to SOWgp-immune mice challenged with the parental strain. To explain these results, we proposed that retention of SOWgp on the surfaces of endospores of the mutant strain in the presence of high titers of antibody to the immunodominant antigen contributes to opsonization, increased phagocytosis, and killing of the fungal cells. In vitro studies of the interaction between a murine alveolar macrophage cell line and parasitic cells coated with SOWgp showed that the addition of anti-SOWgp antibody could enhance phagocytosis and killing of Coccidioides. We suggest that Mep1 plays a pivotal role as a pathogenicity determinant during coccidioidal infections and contributes to the ability of the pathogen to persist within the mammalian host.

Indexed as

PhagocytosisAnimalsAntibodies, FungalAntigens, FungalCoccidioidesCoccidioidomycosisMacrophages, AlveolarMetalloendopeptidasesMiceMice, Inbred C57BLMolecular Sequence DataMutationOpsonin ProteinsSpores, FungalAntibodies, FungalAntigens, FungalMetalloendopeptidasesmetallopeptidase-1Opsonin Proteins

Identifiers

PMID16177346
PMCPMC1230962
OpenAlexW2098785804

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.