MAP3738c and MptD are specific tags of Mycobacterium avium subsp. paratuberculosis infection in type I diabetes mellitus

• Published in: Clinical immunology (Orlando, Fla.) Vol. 141; no. 1; pp. 49 - 57
• Main Authors: Cossu, Andrea, Rosu, Valentina, Paccagnini, Daniela, Cossu, Davide, Pacifico, Adolfo, Sechi, Leonardo Antonio
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier Inc 01.10.2011; Elsevier
• Subjects: Adult; Aged; Allergy and Immunology; Antibodies, Bacterial - blood; Antigens, Bacterial - genetics; Autoimmune diseases; Bacterial Proteins - genetics; Bacterial Proteins - immunology; Base Sequence; Biological and medical sciences; Case-Control Studies; Diabetes Complications - immunology; Diabetes Complications - microbiology; Diabetes Mellitus, Type 1 - complications; Diabetes Mellitus, Type 1 - immunology; Diabetes Mellitus, Type 1 - microbiology; Diabetes Mellitus, Type 2 - complications; Diabetes Mellitus, Type 2 - immunology; Diabetes Mellitus, Type 2 - microbiology; Diabetes. Impaired glucose tolerance; DNA, Bacterial - genetics; Endocrine pancreas. Apud cells (diseases); Endocrinopathies; Enzyme-Linked Immunosorbent Assay; Etiopathogenesis. Screening. Investigations. Target tissue resistance; Female; Fundamental and applied biological sciences. Psychology; Fundamental immunology; Genes, Bacterial; Humans; Male; Medical sciences; Middle Aged; Mycobacterium avium; Mycobacterium avium subsp. paratuberculosis; Mycobacterium avium subsp. paratuberculosis - genetics; Mycobacterium avium subsp. paratuberculosis - immunology; Paratuberculosis - complications; Paratuberculosis - immunology; Paratuberculosis - microbiology; Recombinant proteins; Recombinant Proteins - genetics; Recombinant Proteins - immunology; Ruminantia; Seroactivity; Type I Diabetes mellitus (T1DM); Young Adult; Seroactivity; Mycobacterium avium subsp. paratuberculosis; Type I Diabetes mellitus (T1DM); Autoimmune diseases; Recombinant proteins; Endocrinopathy; Immunopathology; Paratuberculosis; Mycobacterium avium; Autoimmune disease; Mycobacterial infection; Infection; Immunology; Mycobacteriales; Type 1 diabetes; Bacteriosis; Mycobacteriaceae; Bacteria; Actinomycetes; Recombinant protein; Mycobacterium avium subsp
• ISSN: 1521-6616; 1521-7035; 1521-7035
• DOI: 10.1016/j.clim.2011.05.002

Mycobacterium avium subsp. paratuberculosis (Map) is the causative agent of Johne's disease, a chronic inflammation of ruminants' intestine. Recent studies have linked Map to type I Diabetes mellitus (T1DM). We searched the presence of antibodies against two specific proteins of Map (MptD and MAP3738c) in sera of patients affected by T1DM and type II Diabetes mellitus (T2DM). MptD protein (MAP3733c) has been recognized as a Map virulent factor whereas MAP3738c has not yet been studied. Both proteins are encoded by genes belonging to a Map specific pathogenicity island. Forty three T1DM patients' sera, 56 T2DM patients' sera and 48 healthy subjects' sera were screened by ELISA to evaluate the immunoresponse against MptD or MAP3738c recombinant proteins. Results showed a positive response to both proteins in T1DM patients whereas no difference with controls was found for T2DM patients. Results suggest a potential relation between T1DM and the bacterial infection. ► Antibodies against MAP3733c and MAP3738c in T1DM and T2DM sera were searched. ► Both proteins are species-specific and belong to a MAP pathogenicity island. ► Sera from 43 T1DM patients, 56 T2DM patients and 48 healthy subjects were evaluated ► A significative response was observed in T1DM patients but not in T2DM ► A MAP specific humoral response in T1DM but not in T2DM patients was observed