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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Root canal content from primary endodontic infection and upregulation of gelatinases in fibroblast cells

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Author(s):
Herrera, D. R. [1] ; Silva, E. J. N. L. [1, 2] ; Santos, C. C. [1] ; Zaia, A. A. [1] ; Ferraz, C. C. R. [1] ; Almeida, J. F. A. [1] ; Gomes, B. P. F. A. [1]
Total Authors: 7
Affiliation:
[1] State Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Restorat Dent, Endodont Div, BR-13414903 Sao Paulo - Brazil
[2] Grande Rio Univ UNIGRANRIO, Hlth & Sci Ctr, Rio De Janeiro - Brazil
Total Affiliations: 2
Document type: Journal article
Source: International Endodontic Journal; v. 48, n. 12, p. 1168-1174, DEC 2015.
Web of Science Citations: 5
Abstract

AimTo investigate endotoxin levels from primary endodontic infections before and after chemomechanical preparation (CMP) and to determine their antigenicity against 3T3 fibroblasts through gelatinolytic activity of matrix metalloproteinases (MMPs). MethodologyTwenty-four root canals with primary endodontic infection and apical periodontitis were selected. Samples were collected using paper points before (S1) and after chemomechanical preparation (CMP) (S2). The limulus amebocyte lysate assay was used for endotoxin measurement. Fibroblasts were stimulated with root canal contents for 24h. Supernatants of cell cultures stimulated with root canal contents were collected after 24h to determine the levels of MMP-2 and MMP-9 gelatinolytic activity using the zymography technique. Friedman and Wilcoxon tests were used to compare the amount of endotoxin before (S1) and after CMP (S2) (P<0.05). Data obtained from gelatinolytic activity were analysed using anova and Tukey's tests (P<0.05). ResultsEndotoxin was recovered in 100% of the samples. There was a significant reduction in endotoxin levels after CMP (P<0.05). A correlation was found between the levels of endotoxins and MMP-2 expression (P<0.05). Root canal contents of initial samples (S1) induced significantly greater MMP-2 expression by fibroblasts when compared to S2 and the nonstimulated group (P<0.05). No gelatinolytic activity of MMP-9 was observed in S1, S2 and control group. ConclusionsRoot canal contents from primary endodontic infections had gelatinolytic activity for MMP-2. Moreover, CMP was effective in reducing endotoxin levels and their antigenicity against fibroblasts on gelatinolytic activity. (AU)

FAPESP's process: 10/19136-1 - Microbiological and endotoxins analysis in primarily infected root canals with apical periodontitis and their antigenic potencial against macrophages to produce IL1-beta e TNF-alfa during endodontic treatment
Grantee:Brenda Paula Figueiredo de Almeida Gomes
Support Opportunities: Regular Research Grants
FAPESP's process: 10/17877-4 - Microbiological analysis and quantification of endotoxins and proinflammatory cytokines from primarily infected root canals with apical periodontitis
Grantee:Brenda Paula Figueiredo de Almeida Gomes
Support Opportunities: Regular Research Grants
FAPESP's process: 10/13498-9 - Microbiological analysis and quantification of endotoxins and proinflammatory cytokines from primarily infected root canals with apical periodontitis
Grantee:Daniel Rodrigo Herrera Morante
Support Opportunities: Scholarships in Brazil - Doctorate