Evidence map›Paper›PMID 29263343›Full record

ArticleScientific reports2017

Convergent microevolution of Cryptococcus neoformans hypervirulence in the laboratory and the clinic.

Samantha D M Arras, Kate L Ormerod, Paige E Erpf, Monica I Espinosa, Alex C Carpenter, Ross D Blundell, Samantha R Stowasser, Benjamin L Schulz, Milos Tanurdzic, James A Fraser

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

35 citing papers in PubMed, 1 synthesis or guideline pooled it, 48 citations in OpenAlex.

  1. Pooled it
  2. Insights on molecular drivers of phenotypic plasticity in Candidozyma auris.World journal of microbiology & biotechnology · 2026
    Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. A method for authenticating the fidelity ofMicrobiology spectrum · 2025
    Article
  10. Article
  11. Article
  12. Frontiers in immunology · 2025
    Article
  13. Exposure of Cryptococcus neoformans to low nitrogen levels enhances virulence.International microbiology : the official journal of the Spanish Society for Microbiology · 2024
    Article
  14. Review
  15. Vaccine Strategies for Cryptococcus neoformans.Methods in molecular biology (Clifton, N.J.) · 2024
    Article
  16. Article
  17. Article
  18. Importance of Clinical Isolates inJournal of fungi (Basel, Switzerland) · 2023
    Review
  19. Journal of fungi (Basel, Switzerland) · 2022
    Review
  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

10 authors at 1 institution in 1 country.

Samantha D M ArrasAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Kate L OrmerodAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.ORCID 0000-0003-2339-114X
Paige E ErpfAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Monica I EspinosaAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Alex C CarpenterAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Ross D BlundellAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Samantha R StowasserAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Benjamin L SchulzAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia.
Milos TanurdzicSchool of Biological Sciences, The University of Queensland, Brisbane, Queensland, Australia.
James A FraserAustralian Infectious Diseases Research Centre, The University of Queensland, Brisbane, Queensland, Australia. jafraser@uq.edu.au.
The University of Queensland · AU

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Reference strains are a key component of laboratory research, providing a common background allowing for comparisons across a community of researchers. However, laboratory passage of these strains has been shown to lead to reduced fitness and the attenuation of virulence in some species. In this study we show the opposite in the fungal pathogen Cryptococcus neoformans, with analysis of a collection of type strain H99 subcultures revealing that the most commonly used laboratory subcultures belong to a mutant lineage of the type strain that is hypervirulent. The pleiotropic mutant phenotypes in this H99L (for "Laboratory") lineage are the result of a deletion in the gene encoding the SAGA Associated Factor Sgf29, a mutation that is also present in the widely-used H99L-derived KN99a/α congenic pair. At a molecular level, loss of this gene results in a reduction in histone H3K9 acetylation. Remarkably, analysis of clinical isolates identified loss of function SGF29 mutations in C. neoformans strains infecting two of fourteen patients, demonstrating not only the first example of hypervirulence in clinical C. neoformans samples, but also parallels between in vitro and in vivo microevolution for hypervirulence in this important pathogen.

Indexed as

Evolution, MolecularMutationVirulenceAcetyltransferasesAdultAnimalsCryptococcosisCryptococcus neoformansDisease Models, AnimalDNA, FungalFemaleHumansMaleMiceMice, Inbred BALB CPhenotypeAcetyltransferasesDNA, FungalSgf29 protein, humanVirulence Factors

Identifiers

PMID29263343
PMCPMC5738413
OpenAlexW2773927394

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.