ArticleBMC microbiology2014
Gingipains from Porphyromonas gingivalis play a significant role in induction and regulation of CXCL8 in THP-1 cells.
Article in BMC microbiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.
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.
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
17 citing papers in PubMed, 34 citations in OpenAlex.
- Testosterone Modulates Virulence-Associated Phenotypes ofPathogens (Basel, Switzerland) · 2026Article
- The oral microbiota in oral squamous cell carcinoma: unravelling mechanisms and clinical potential.Cancer cell international · 2026Review
- The oral-gut microbiota axis in cardiovascular diseases: mechanisms, therapeutic targets, and translational challenges.Frontiers in cellular and infection microbiology · 2025Review
- Impaired Periodontitis-Induced Cytokine Production by Peripheral Blood Monocytes and Myeloid Dendritic Cells in Patients with Rheumatoid Arthritis: A Case-Control Study.Journal of clinical medicine · 2024Article
- Article
- Effects of estradiol on the virulence traits of Porphyromonas gingivalis.Scientific reports · 2022Article
- A Photoacoustic-Fluorescent Imaging Probe for Proteolytic Gingipains Expressed by Porphyromonas gingivalis.Angewandte Chemie (International ed. in English) · 2022Article
- Progress in Oral Microbiome Related to Oral and Systemic Diseases: An Update.Diagnostics (Basel, Switzerland) · 2021Review
- Porphyromonas gingivalis infection alters Nrf2-phase II enzymes and nitric oxide in primary human aortic endothelial cells.Journal of periodontology · 2021Article
- Article
- The Human Oral Microbiome in Health and Disease: From Sequences to Ecosystems.Microorganisms · 2020Review
- Transcriptional profiling of human smooth muscle cells infected with gingipain and fimbriae mutants of Porphyromonas gingivalis.Scientific reports · 2016Article
- Linkages between oral commensal bacteria and atherosclerotic plaques in coronary artery disease patients.NPJ biofilms and microbiomes · 2016Article
- Characterization of Innate Immune Responses of Human Endothelial Cells Induced byFrontiers in cellular and infection microbiology · 2016Article
- Gingipains from the Periodontal Pathogen Porphyromonas gingivalis Play a Significant Role in Regulation of Angiopoietin 1 and Angiopoietin 2 in Human Aortic Smooth Muscle Cells.Infection and immunity · 2015Article
- Article
- Gum-on-a-Chip Exploring Host-Microbe Interactions: Periodontal Disease Modeling and Drug Discovery.Journal of tissue engineeringArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPorphyromonas gingivalis is an important bacterial etiological agent involved in periodontitis. The bacterium expresses two kinds of cysteine proteases called gingipains: arginine gingipains (RgpA/B) and lysine gingipain (Kgp). This study evaluated the interaction between P. gingivalis and THP-1 cells, a widely used monocytic cell line, in vitro with a focus on CXCL8 at the gene and protein levels and its fate thereafter in cell culture supernatants. THP-1 cells were stimulated with viable and heat-killed wild-type strains ATCC 33277 or W50 or viable isogenic gingipain mutants of W50, E8 (Rgp mutant) or K1A (Kgp mutant), for 24 hours.
resultsELISA and qPCR results show an elevated CXCL8 expression and secretion in THP-1 cells in response to P. gingivalis, where the heat-killed ATCC33277 and W50 induced higher levels of CXCL8 in comparison to their viable counterparts. Furthermore, the Kgp-deficient mutant K1A caused a higher CXCL8 response compared to the Rgp-deficient E8. Chromogenic quantification of lipopolysaccharide (LPS) in supernatant showed no significant differences between viable and heat killed bacteria except that W50 shed highest levels of LPS. The wild-type strains secreted relatively more Rgp during the co-culture with THP-1 cells. The CXCL8 degradation assay of filter-sterilized supernatant from heat-killed W50 treated cells showed that Rgp was most efficient at CXCL8 hydrolysis. Of all tested P. gingivalis strains, adhesion and internalization in THP-1 cells was least conspicuous by Rgp-deficient P. gingivalis (E8), as demonstrated by confocal imaging.
conclusionsW50 and its Kgp mutant K1A exhibit a higher immunogenic and proteolytic function in comparison to the Rgp mutant E8. Since K1A differs from E8 in the expression of Rgp, it is rational to conclude that Rgp contributes to immunomodulation in a more dynamic manner in comparison to Kgp. Also, W50 is a more virulent strain when compared to the laboratory strain ATCC33277.
Indexed as
Identifiers
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.