Prevalence of positive autoimmune biomarkers in the brucellosis patients

Ahmadinejad, Zahra; Abdollahi, Alireza; Ziaee, Vahid; Domiraei, Zeinab; Jafari, Sara; Ahmadinejad, Mehdi

doi:10.1007/s10067-016-3171-7

Cited by 15 publications

(24 citation statements)

References 33 publications

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“…Although the association between bacterial infections and autoimmune disorders is still not fully understood (52), recent reports indicate molecular mimicry may be responsible for activation of autoimmune diseases (53–57). Consistent with this, Brucella infections have been implicated in several autoimmune diseases (58–61). The genome of Brucella melitensis is predicted to encode for 3197 ORFs distributed over two circular chromosomes (62).…”

Section: Discussionmentioning

confidence: 53%

BrucellaPeptide Cross-Reactive MHC I Presentation Activates SIINFEKL-Specific TCR Expressing T Cells

Harms

Khan

Hall³

et al. 2018

Preprint

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Running Title: Brucella peptides are cross-reactive with SIINFEKL 7 8 ABSTRACT 25Brucella spp are intracellular pathogenic bacteria remarkable in their ability to escape 26 immune surveillance and therefore inflict a state of chronic disease within the host. To 27 enable further immune response studies, Brucella were engineered to express the well 28 characterized chicken ovalbumin (OVA). Surprisingly, we found that CD8 T cells bearing 29 T cell receptors (TCR) nominally specific for the OVA peptide SIINFEKL (OT-1) reacted 30 to parental Brucella-infected targets as well as OVA-expressing Brucella variants in 31 cytotoxicity assays. Furthermore, splenocytes from Brucella immunized mice produced 32 IFN- and exhibited cytotoxicity in response to SIINFEKL-pulsed target cells. To 33 determine if the SIINFEKL-reactive OT-1 TCR could be cross-reacting to Brucella 34 peptides, we searched the Brucella proteome using an algorithm to generate a list of 35 near-neighbor nonamer peptides that would bind to H2K b . Selecting five Brucella 36 peptide candidates, along with controls, we verified that several of these peptides 37 mimicked SIINFEKL resulting in T cell activation through the "SIINFEKL-specific" TCR. 38 3 Activation was dependent on peptide concentration as well as sequence. Our results 39 underscore the complexity and ubiquity of cross-reactivity in T cell recognition. This 40 cross-reactivity may enable microbes such as Brucella to escape immune surveillance 41 by presenting peptides similar to the host, and may also lead to the activation of 42 autoreactive T cells. 43 44 45 the Institutional Animal Care and Use Committee (IACUC) with strict adherence. 100 101 Cells and Cell culture. Brucella melitensis 16M strains and all Escherichia coli strains 102 used in this project were cultured in Brain Heart Infusion (BHI) broth or agar at 37C. 103 6 Mouse dendritic cell line DC 2.4 (H2K b ), and mouse monocyte cell line LADMAC were 104 cultured in RPMI supplemented with 10% FCS, and 1mM sodium pyruvate (R10) in a 105 humidified 37C incubator with 5% CO 2 . The B3Z CD8 + T cell hybridoma cell line, 106 specific for the SIINFEKL (OVA 257-264 /K b ) peptide of OVA, was a kind gift from Dr. J.D. 107 Sauer (University of Wisconsin-Madison). B3Z cells were cultured in R10 + 500 g/ml 108 G418 (Geneticin). Bone marrow derived macrophages (BMDM) were prepared by the 109 culturing of bone marrow cells from the tibia/fibula of mice in R10 conditioned with 20% 110 LADMAC supernatant. 111 112 Plasmid and transposon engineering. We used the EZ-Tn5™ (Lucigen) transposon 113 mutagenesis system for random insertion into the Brucella genome following the 114 manufacturer's recommended protocol. The insert was cloned into the transposon 115 construction vector pMOD™-3 so that rescue cloning could be 116 performed to determine the insertion site within the transformed Brucella. The partial 117 OVA sequence was amplified from the vector pPL2erm-ActA100-B8R-OVA (kind gift 118 from Dr. J.D. Sauer). Primers incorporated a B...

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Section: Discussionmentioning

confidence: 53%

BrucellaPeptide Cross-Reactive MHC I Presentation Activates SIINFEKL-Specific TCR Expressing T Cells

Harms

Khan

Hall³

et al. 2018

Preprint

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“…Infectious diseases of the liver are other examples of the wide spectrum of non-genetic rare diseases as well as rare manifestations of common diseases. Infections such as brucellosis [29][30][31][32][33] or leishmaniosis 34 are rare in Europe -so is schistosomiasis, which on a world-wide scale is one of the most common infectious diseases and one of the most common liver diseases we know. Furthermore, hepatitis E infection appears to be very common in Europe, with a seroprevalence for anti-HEV antibodies estimated to be around 10-20%.…”

Section: How Common Is Rare?mentioning

confidence: 99%

Access to care in rare liver diseases: New challenges and new opportunities

Jones

Sturm

Lohse

2018

Journal of Hepatology

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Patients with rare diseases are often disadvantaged, particularly those with rare liver diseases. Reasons for disadvantage include delayed or overlooked diagnosis, lack of local expertise and high-quality care, poor scientific understanding of the disease process and limited therapeutic options. In adult liver disease this can be compounded by prejudices towards patients with liver disease in general, because of a perception (incorrect for all rare liver diseases) that liver disease is lifestyle related and thus "self-inflicted". In paediatric rare liver diseases, such as biliary atresia, optimising outcomes requires a particularly timely diagnosis. Irrespective of patient age, the scientific and medical community must rise to the challenge of advancing our understanding of rare liver disease, searching for more effective and specific therapies, and providing the infrastructure to provide the best care for all patients, infants, children, young and older adults. The European Reference Network for Rare Liver Diseases is an important step in this direction.

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“…Positive serological tests for rheumatic and autoimmune diseases such as rheumatoid factor (RF) and antinuclear antibody (ANA) are encountered in a relatively high proportion of patients with brucellosis [231]. Therefore, in endemic locations for brucellosis, interpretation of positive serology for rheumatic and autoimmune diseases such as RF and ANA should be taken into consideration.…”

Section: New Biomarkers Of Brucellosismentioning

confidence: 99%

“…Therefore, in endemic locations for brucellosis, interpretation of positive serology for rheumatic and autoimmune diseases such as RF and ANA should be taken into consideration. Discrimination between brucellosis and rheumatoid disorders, both clinically and serologically, may be difficult in regions that are endemic for brucellosis [231].…”

Section: New Biomarkers Of Brucellosismentioning

confidence: 99%