Evidence map›Paper›PMID 11733559›Full record

ArticleThe Journal of clinical investigation2001

Phenotypic switching of Cryptococcus neoformans occurs in vivo and influences the outcome of infection.

B C Fries, C P Taborda, E Serfass, A Casadevall

Open access · greenAbstract read
In one paragraph

Article in The Journal of clinical investigation, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 61 papers.

0numbers the graph read from it
0cells of the map it votes in
61citing papers in PubMed
4.2field-weighted citation impact, top 5% 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

61 citing papers in PubMed, 107 citations in OpenAlex.

  1. Insights on molecular drivers of phenotypic plasticity in Candidozyma auris.World journal of microbiology & biotechnology · 2026
    Review
  2. Review
  3. Review
  4. Article
  5. Similar evolutionary trajectories in an environmentalProceedings of the National Academy of Sciences of the United States of America · 2023
    Article
  6. Article
  7. Article
  8. Review
  9. Ultrastructural Study ofFrontiers in microbiology · 2021
    Article
  10. Review
  11. Serial Passage ofPathogens (Basel, Switzerland) · 2020
    Article
  12. Advances in Fungal Peptide Vaccines.Journal of fungi (Basel, Switzerland) · 2020
    Review
  13. Review
  14. Review
  15. Clonal Dispersal ofJournal of fungi (Basel, Switzerland) · 2019
    Article
  16. Article
  17. Review
  18. Article
  19. Review
  20. Article

1 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 2 institutions in 1 country.

B C FriesDepartment of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, USA. fries@aecom.yu.edu
C P Taborda
E Serfass
A Casadevall
Yeshiva University · USAlbert Einstein College of Medicine · US

Funding

Synergy of Host Defense Mechanisms in the LungR01HL059842 · NHLBI · YESHIVA UNIVERSITY · PI CASADEVALL, ARTURO · 1997 to 2023
$7.4M
PROTECTIVE ANTIBODIES FOR CRYPTOCOCCAL INFECTIONSR01AI033774 · NIAID · YESHIVA UNIVERSITY · PI CASADEVALL, ARTURO · 1994 to 2014
$5.6M
MOLECULAR BASIS OF PHENOTYPIC SWITCHING IN 24067 MUTANTK08AI001570 · NIAID · YESHIVA UNIVERSITY · PI FRIES, BETTINA · 1999 to 2003
$494k
NHLBI NIH HHS HL59842NHLBI NIH HHS R01 HL059842NIAID NIH HHS AI3342NIAID NIH HHS KO8-AI01570NIAID NIH HHS R01 AI033774NIAID NIH HHS R01-AI33774
6 · The paper itself

Abstract

Phenotypic switching has been linked to the virulence of many pathogens, including fungi. However, it has not been conclusively shown to occur in vivo or to influence the outcome of infection. Cryptococcus neoformans undergoes phenotypic switching in vitro to colony types that differ in their virulence in mice. In this study, we asked whether C. neoformans undergoes phenotypic switching in vivo and whether this phenomenon contributes to virulence. By using a small inoculum to preclude the introduction of variants that had already switched during in vitro propagation, we demonstrated that in vivo switching to a mucoid phenotype occurred in two mice strains and was associated with a lethal outcome. Phenotypic switching resulted in changes of the capsular polysaccharide that inhibited phagocytosis by alveolar macrophages. This promoted a more vigorous inflammatory response and rapid demise. These data document in vivo switching in a fungus and associate this phenomenon with enhanced virulence and a lethal outcome. The importance of this finding is underscored by the increased likelihood of phenotypic switching in chronic cryptococcosis; thus this mechanism may account for the inability to eradicate the organism in immunocompromised hosts.

Indexed as

AnimalsChemokinesCryptococcosisCryptococcus neoformansCytokinesImmunity, CellularMaleMiceMice, Inbred BALB CPhagocytosisPhenotypePolysaccharidesVirulenceChemokinesCytokinesglucuronoxylomannanPolysaccharides

Identifiers

PMID11733559
PMCPMC200988
OpenAlexW2120739562

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.