ArticlePloS one2017
Differences in SpeB protease activity among group A streptococci associated with superficial, invasive, and autoimmune disease.
Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
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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.
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.
Who cites it
8 citing papers in PubMed, 13 citations in OpenAlex.
- Pentamidine inhibition of streptopain attenuatesMicrobiology spectrum · 2025Article
- Pentamidine inhibition of streptopain attenuatesbioRxiv : the preprint server for biology · 2025Article
- Proinflammatory synergy between protease and superantigen streptococcal pyogenic exotoxins.Infection and immunity · 2025Article
- Global spread of Streptococcus pyogenes A genomics-supported narrative review.FEMS microbiology reviews · 2025Review
- Abrin Toxin Paradoxically Increases Protein Synthesis in Stimulated CD4Current issues in molecular biology · 2024Article
- Clinical Snapshot of Group A Streptococcal Isolates from an Australian Tertiary Hospital.Pathogens (Basel, Switzerland) · 2024Article
- Neutrophil-derived reactive agents induce a transient SpeB negative phenotype in Streptococcus pyogenes.Journal of biomedical science · 2023Article
- Toxins and Superantigens of Group A Streptococci.Microbiology spectrum · 2019Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 1 country.
Funding
Abstract
The secreted cysteine proteinase SpeB is an important virulence factor of group A streptococci (GAS), whereby SpeB activity varies widely among strains. To establish the degree to which SpeB activity correlates with disease, GAS organisms were recovered from patients with pharyngitis, impetigo, invasive disease or acute rheumatic fever (ARF), and selected for analysis using rigorous sampling criteria; >300 GAS isolates were tested for SpeB activity by casein digestion assays, and each GAS isolate was scored as a SpeB-producer or non-producer. Highly significant statistical differences (p < 0.01) in SpeB production are observed between GAS recovered from patients with ARF (41.5% SpeB-non-producers) compared to pharyngitis (20.5%), invasive disease (16.7%), and impetigo (5.5%). SpeB activity differences between pharyngitis and impetigo isolates are also significant, whereas pharyngitis versus invasive isolates show no significant difference. The disproportionately greater number of SpeB-non-producers among ARF-associated isolates may indicate an altered transcriptional program for many rheumatogenic strains and/or a protective role for SpeB in GAS-triggered autoimmunity.
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What OpenQuestion holds
Registered trials
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.