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Array analysis for T-cell associated cytokines in gingival crevicular fluid: Identifying altered profiles associated with periodontal disease status.

Abstract：

OBJECTIVE:Cytokine networks regulate innate and adaptive immune responses, which in turn are recognised to direct the progression or arrest of periodontal disease. This study aimed to compare the profile of seven cytokines, implicated in regulating T-cell networks, in gingival crevicular fluid (GCF) samples with differing classification of periodontal status. METHODS:GCF samples were collected from patients with strong clinical evidence for chronic periodontitis, aggressive periodontitis, gingivitis or no gingival inflammation. Cytokines IL-6, IFN-ɣ, IL-4, IL-2, IL-17 A, IL10 and TNFα were measured in each sample using a commercial cytometric bead array assay. Descriptive statistics were used to indicate central tendency, data scatter and analysis of variance for each cytokine concentrations between respective patient groups. Heat maps with dendrograms were produced to visualise hierarchical clustering and trends within the data. RESULTS:Median concentrations for all cytokines analysed were highest for gingivitis samples and lowest for aggressive periodontitis samples. The median concentration of IL-6 in gingivitis samples was observed to be 10.5 fold higher (˜17,300 pg/μl) than IL-6 in aggressive periodontitis samples (˜1600 pg/μl). Median concentrations of IL-10, IL-17 A and TNFα were also 2-2.2 fold higher in gingivitis samples compared to aggressive periodontitis. CONCLUSIONS:Descriptive statistical analysis noted raised concentrations of IL-6, IL-17 A and TNFα associated with gingivitis; pro-inflammatory cytokines usually associated with periodontal tissue destruction, including bone. Our results would suggest that these cytokines can additionally provide protective roles in preventing progression to advanced forms of periodontal disease. Potential for how these cytokines contribute to providing this role is discussed. CLINICAL SIGNIFICANCE:Defining the roles for the many cytokines involved in the pathogenesis of periodontal disease is far from complete. Consequently the results of this study serve to evidence proposals that cytokines can exhibit both pro- and anti-inflammatory effects, which is dependent on the signalling environment within which they exist and the antagonizing or modifying actions of other cytokines. Whilst future research is necessary to explore mechanistic action, our study contributes new knowledge suggesting that IL-6 and IL-17 A can provide roles in stabilising the lesion to limit disease progression, which does not preclude alternative roles in promoting periodontal bone loss in advanced forms of disease progression, which is also documented in the literature.

journal_name

J Dent

journal_title

Journal of dentistry

authors

Koshy B,Rees JS,Farnell DDJJ,Wei XQ,Waddington RJ

doi

10.1016/j.jdent.2019.04.009

subject

Has Abstract

pub_date

2019-06-01 00:00:00

pages

39-46

eissn

0300-5712

issn

1879-176X

pii

S0300-5712(19)30070-3

journal_volume

pub_type

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Array analysis for T-cell associated cytokines in gingival crevicular fluid: Identifying altered profiles associated with periodontal disease status.