Evidence map›Paper›PMID 26270535›Full record

ArticlePloS one2015

Green Tea Modulates Cytokine Expression in the Periodontium and Attenuates Alveolar Bone Resorption in Type 1 Diabetic Rats.

Gabriela Gennaro, Marcela Claudino, Tania Mary Cestari, Daniele Ceolin, Patrícia Germino, Gustavo Pompermaier Garlet, Gerson Francisco de Assis

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 12% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 42 citations in OpenAlex.

  1. Pooled it
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  3. Anti-inflammatory effectiveness ofBiochemistry and biophysics reports · 2024
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  10. Camellia Sinensis Mouthwashes in Oral Care: a Systematic Review.Journal of dentistry (Shiraz, Iran) · 2020
    Review
  11. Osteoprotective Roles of Green Tea Catechins.Antioxidants (Basel, Switzerland) · 2020
    Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Antidiabetic Effects of Tea.Molecules (Basel, Switzerland) · 2017
    Review
  17. Review
  18. Article
  19. 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

7 authors.

Gabriela GennaroDepartment of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil.
Marcela ClaudinoDepartment of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil.
Tania Mary CestariDepartment of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil.
Daniele CeolinDepartment of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil.
Patrícia GerminoDepartment of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil.
Gustavo Pompermaier GarletDepartment of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil.
Gerson Francisco de AssisDepartment of Biological Sciences, School of Dentistry of Bauru, São Paulo University, Bauru, São Paulo, Brazil.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

unlabelledDiabetes mellitus comprises a heterogeneous group of disorders with the main feature of hyperglycemia. Chronic hyperglycemia increases the severity of periodontal disease via an exacerbated inflammatory response, activated by advanced glycation end products and their receptor, RAGE. Therefore, anti-inflammatory agents represent potential inhibitors of this pathological interaction. In particular, green tea has been shown to possess anti-inflammatory properties mediated by its polyphenol content.

objectivesThis study investigated the mechanisms by which green tea attenuates the spontaneous onset of diabetes-induced periodontitis.

methodsDiabetes was induced in rats via a single intraperitoneal injection of streptozotocin (STZ). Diabetic and control animals were divided into water-treated and green tea-treated subgroups and were analyzed at 15, 30, 60 and 90 days after diabetes induction. Immunohistochemistry was performed to quantitatively evaluate tumor necrosis factor-α (TNF-α), receptor activator of nuclear factor kappa-B ligand (RANKL), osteoprotegerin (OPG), interleukin-10 (IL-10) and runt-related transcription factor 2 (RUNX-2) expression in serial sections of each hemimaxilla. Morphometric measurements of the distance from the cementum-enamel junction (CEJ) of the superior distal root of the first molar to the alveolar bone crest (ABC) were performed to assess bone loss.

resultsDiabetes resulted in significant bone loss and alterations in the number of cells that stained positive for inflammatory mediators. In the diabetic rats treated with green tea, we observed a decreased number of cells expressing RANKL and TNF-α compared with that observed in the diabetic rats treated with water. Additionally, green tea increased the numbers of cells that stained positive for OPG, RUNX-2 and IL-10 in the diabetic rats.

conclusionGreen tea intake reduces expression of the pro-inflammatory cytokine TNF-α and the osteoclastogenic mediator RANKL to normal levels while increasing expression of the anti-inflammatory cytokine IL-10, the osteogenesis-related factor RUNX-2 and the anti-osteoclastogenic factor OPG. Therefore, green tea represents a potential therapeutic agent for the treatment of diabetes-related periodontal disease.

Indexed as

TeaAnimalsCore Binding Factor Alpha 1 SubunitCytokinesDiabetes Mellitus, Type 1Gene Expression RegulationMaleOsteoprotegerinPeriodontiumRatsRats, WistarCore Binding Factor Alpha 1 SubunitCytokinesOsteoprotegerinRunx2 protein, ratTeaTnfrsf11b protein, rat

Identifiers

PMID26270535
PMCPMC4535908
OpenAlexW2158346570

What OpenQuestion holds

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LicenceCC BY
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Registered trials

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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.