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Detection of potential markers of primary fibromyalgia syndrome in human saliva – Source: Proteomics, Clinical Applications, Nov 2009

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By L Bazzichi, et al. • • December 9, 2010

In the last few years, many attempts have been carried out for the research of specific biological biomarkers in fibromyalgia (FM) since, so far, no laboratory tests have been appropriately validated for the diagnosis and the prognostic stratification of the disease.

In our study for the first time, we carried out a proteomic analysis of the whole saliva of FM patients in order to evaluate salivary biomarkers. Twenty-two FM patients with all fulfilling the American College of Rheumathology diagnostic criteria for FM and 26 sex-and age-matched healthy subjects were enrolled in the study.

Proteomic analysis was performed by combining 2-DE and MALDI-TOF-MS.

The most relevant observation which emerged from the data analysis was the exclusive and significant over-expression of transaldolase and phosphoglycerate mutase I. These findings were validated by Western blot analysis and the total optical density confirmed the significant up-regulation of transaldolase and phosphoglycerate mutase I in FM samples with respect to healthy subjects.

It was noteworthy that seven further salivary proteins resulted differentially expressed, namely: calgranulin A, calgranulin C, cyclophilin A, profilin 1, Rho GDP-dissociation inhibitor 2, proteasome subunit-?-type-2 and haptoglobin-related protein precursor.

These preliminary results demonstrated the utility of salivary proteomic analysis in the identification of salivary biomarkers in FM patients and in clarifying some of the pathogenetic aspects of the disease.

Source: Proteomics, Clinical Applications, Nov 2009. PMID: 21136951, by Bazzichi L, Ciregia F, Giusti L, Baldini C, Giannaccini G, Giacomelli C, Sernissi F, Bombardieri S, Lucacchini A. Department of Internal Medicine, Rheumatology Unit, University of Pisa, Pisa, Italy.

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