Increased gut permeability and bacterial translocation are associated with fibromyalgia and myalgic encephalomyelitis/chronic fatigue syndrome: implications for disease-related biomarker discovery
Franz Martín, Manuel Blanco-Suárez, Paola Zambrano, Oscar Cáceres, Miriam Almirall, José Alegre-Martín, Beatriz Lobo, Ana Maria González-Castro , Javier Santos, Joan Carles Domingo, Joanna Jurek, Jesús Castro-Marrero
Frontiers in Immunology2023 SepPubMed ID: 37744357Read Article
Applications: IA
Reactive species: Unspecified reactive species
"Abstract: Background: There is growing evidence of the significance of gastrointestinal complaints in the impairment of the intestinal mucosal barrier function and inflammation in fibromyalgia (FM) and in myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). However, data on intestinal permeability and gut barrier dysfunction in FM and ME/CFS are still limited with conflicting results. This study aimed to assess circulating biomarkers potentially related to intestinal barrier dysfunction and bacterial translocation and their association with self-reported symptoms in these conditions.
Methods: A pilot multicenter, cross-sectional cohort study with consecutive enrolment of 22 patients with FM, 30 with ME/CFS and 26 matched healthy controls. Plasma levels of anti-beta-lactoglobulin antibodies (IgG anti-β-LGB), zonulin-1 (ZO-1), lipopolysaccharides (LPS), soluble CD14 (sCD14) and interleukin-1-beta (IL-1β) were assayed using ELISA. Demographic and clinical characteristics of the participants were recorded using validated self-reported outcome measures. The diagnostic accuracy of each biomarker was assessed using the receiver operating characteristic (ROC) curve analysis."
Article snippet: The results were given as antibody levels per ng/ml on a standard curve with anti-human beta-LGB chimera monoclonal antibody (clone 25I2;CABT-L2429; Creative Diagnostics, NY, USA) considering the dilution of each sample.
Figure 1. Plasma level of anti-β-LGB in patients with FM (n = 22), ME/CFS (n = 30) and healthy controls (n = 26).