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Immunoassay analysis of proteins in gingival crevicular fluid samples from resorbing teeth
Update time:2016-09-07 01:19:55   【 Font: Large  Medium Small

Abstract
Objective: To carry out an immunoassay analysis of biomarkers expressed in gingival crevicular fluid (GCF) with the main goal of finding a useful diagnostic pattern to distinguish between resorbing deciduous teeth and nonresorbing controls.

Materials and Methods: A split-mouth design was used in this study with a total of 22 GCF samples collected from 11 patients in the mixed dentition. For each child, one deciduous molar with radiographic evidence of root resorption was used as the test tooth whereas the contralateral first permanent molar with formed roots was used as the control tooth. Samples were processed with immunoassays using a panel of selected biomarkers including interleukin-1 beta (IL-1b), interleukin-1 receptor antagonist (IL-1RA), nuclear factor kappa B ligand (RANKL), osteoprotegerin (OPG), matrix metalloproteinase-9 (MMP-9), and dentin sialoprotein (DSP).

Results: There were no statistically significant differences in levels of IL-1b, OPG, and MMP-9 between test and control sites (P >0 .05). IL-1RA was the only biomarker to show a significant down-regulation (P=0?.04) in GCF samples collected from resorbing teeth. RANKL data showed a heavily skewed distribution and was deemed unreliable. Only one deciduous GCF sample had detectable levels of DSP; therefore, no further statistical calculation was applicable because of the limited amount of data for this biomarker.

Conclusions: This study indicated that IL1-RA is down-regulated in GCF from resorbing primary molars, thus suggesting this cytokine as a potential analyte to be included in a panel that can discriminate between resorbing and nonresorbing teeth.

Keywords: GCF, Microarray, Root resorption, Biomarkers

 

 

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Source:The Angle Orthodontist      by Rody Jr W J, Wijegunasinghe M, Holliday L S, et al
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