Evidence map›Paper›PMID 27792814›Full record

ArticleInvestigative ophthalmology & visual science2016

Glycyrrhizin Reduces HMGB1 and Bacterial Load in Pseudomonas aeruginosa Keratitis.

Sandamali A Ekanayaka, Sharon A McClellan, Ronald P Barrett, Shikhil Kharotia, Linda D Hazlett

Open access · goldAbstract read
In one paragraph

Article in Investigative ophthalmology & visual science, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
4.0field-weighted citation impact, top 6% 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

32 citing papers in PubMed, 50 citations in OpenAlex.

  1. Review
  2. Article
  3. PMFrontiers in cellular and infection microbiology · 2023
    Article
  4. Article
  5. Glycyrrhizin Interacts with TLR4 and TLR9 to ResolvePathogens (Basel, Switzerland) · 2022
    Article
  6. Article
  7. Article
  8. Review
  9. The potential of glycyrrhizin and licorice extract in combating COVID-19 and associated conditions.Phytomedicine plus : international journal of phytotherapy and phytopharmacology · 2021
    Review
  10. Review
  11. Article
  12. Article
  13. Ocular Effects of Glycyrrhizin at Acidic and Neutral pH.Frontiers in cellular and infection microbiology · 2021
    Article
  14. Effects of Glycyrrhizin on Multi-Drug ResistantPathogens (Basel, Switzerland) · 2020
    Article
  15. Airborne Particulates Affect Corneal Homeostasis and Immunity.Investigative ophthalmology & visual science · 2020
    Article
  16. Article
  17. Review
  18. Article
  19. Article
  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

5 authors at 2 institutions in 1 country.

Sandamali A EkanayakaDepartment of Anatomy & Cell Biology, Wayne State University School of Medicine, Detroit, Michigan, United States.
Sharon A McClellanDepartment of Anatomy & Cell Biology, Wayne State University School of Medicine, Detroit, Michigan, United States.
Ronald P BarrettDepartment of Anatomy & Cell Biology, Wayne State University School of Medicine, Detroit, Michigan, United States.
Shikhil KharotiaDepartment of Anatomy & Cell Biology, Wayne State University School of Medicine, Detroit, Michigan, United States.
Linda D HazlettDepartment of Anatomy & Cell Biology, Wayne State University School of Medicine, Detroit, Michigan, United States.
Michigan United · USWayne State University · US

Funding

VISION RESEARCH--COREP30EY004068 · NEI · WAYNE STATE UNIVERSITY · PI LINDA D HAZLETT · 1985 to 2026
$13.2M
Role of Toll-Like Receptors in Bacterial KeratitisR01EY016058 · NEI · WAYNE STATE UNIVERSITY · PI HAZLETT, LINDA D · 2005 to 2023
$6.0M
NEI NIH HHS P30 EY004068NEI NIH HHS R01 EY016058
6 · The paper itself

Abstract

purposeHigh mobility group box 1 (HMGB1) contributes to poor disease outcome in Pseudomonas aeruginosa keratitis. This study tests the prophylactic effect of treatment with HMGB1 inhibitors, glycyrrhizin (GLY) and its derivative, carbenoxolone (CBX), for Pseudomonas keratitis.

methodsWe treated C57BL/6 (B6) mice subconjunctivally with GLY or CBX, infected with a noncytotoxic clinical isolate (KEI 1025) or a cytotoxic strain (ATCC 19660) of P. aeruginosa, and injected intraperitoneally with either agent. Clinical score, photography with a slit lamp, real-time RT-PCR, ELISA, myeloperoxidase (MPO) assay, bacterial plate count, histopathology, and absorbance assays were used to assess treatment efficacy and bacteriostatic activity.

resultsAfter KEI 1025 infection, GLY treatment reduced HMGB1 (mRNA and protein levels) and improved disease outcome with significant reduction in mRNA levels of IL-1β, TLR4, CXCL2, and IL-12; protein expression (IL-1β, CXCL2); neutrophil infiltrate; and bacterial load. Treatment with GLY enhanced antimicrobial proteins, including CRAMP and mBD2, but not mBD3. Glycyrrhizin also reduced clinical scores and improved disease outcome in corneas infected with strain 19660. However, neither HMGB1 mRNA or protein levels were reduced, but rather, CXCL2 expression (mRNA and protein), neutrophil infiltrate, and bacterial load were reduced statistically. Treatment with GLY initiated 6 hours after infection reduced plate count; GLY also was bacteriostatic for KEI 1025 and ATCC 19660.

conclusionsGlycyrrhizin reduces HMGB1 and is protective against P. aeruginosa-induced keratitis with a clinical isolate that is noncytotoxic. It was similar, but less effective when used after infection with a cytotoxic strain, which did not reduce HMGB1.

Indexed as

AnimalsAnti-Inflammatory AgentsBacterial LoadCorneaDisease Models, AnimalEnzyme-Linked Immunosorbent AssayEye Infections, BacterialFemaleGene Expression RegulationGlycyrrhizic AcidHMGB1 ProteinKeratitisMiceMice, Inbred C57BLPseudomonas aeruginosaPseudomonas InfectionsAnti-Inflammatory AgentsGlycyrrhizic AcidHMGB1 ProteinHMGB1 protein, mouseRNA, Messenger

Identifiers

PMID27792814
PMCPMC5089214
OpenAlexW2546148780

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.