203: Symposium: Systemic Inflammatory Disease
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203: Symposium: Systemic Inflammatory Disease

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Questions and Answers

What is the specificity of anti-cyclic citrullinated peptide (anti-CCP) antibodies in detecting RA?

98%

In patients with RA, what is the main target of antibodies directed against CCP?

Citrullinated self proteins

Which of the following is true about rheumatoid factor (RF) in the context of RA?

Found in some healthy individuals

What is the role of citrullination in rheumatoid arthritis pathogenesis?

<p>Induces antibody response against self proteins</p> Signup and view all the answers

Which of the following statements is true regarding the presence of anti-cyclic citrullinated peptide (anti-CCP) antibodies in healthy individuals?

<p>Rarely found in those who go on to develop RA</p> Signup and view all the answers

How do anti-CCP+ RA patients generally compare in terms of disease course when compared to RF+ RA patients?

<p>More aggressive clinical course</p> Signup and view all the answers

Which cell type is enriched in the RA joint but has a defect in their suppressive function?

<p>T regulatory cells</p> Signup and view all the answers

Which treatment effectively depletes follicular B cells in RA?

<p>Monoclonal anti-CD20 antibodies</p> Signup and view all the answers

Which immune cells are key effectors in RA, responsible for phagocytosis, antigen presentation, and cytokine production?

<p>Macrophages</p> Signup and view all the answers

What contributes to the complex cellular interactions in rheumatoid arthritis according to Smolen et al.?

<p>Genetic and non-genetic risk factors</p> Signup and view all the answers

Which antibody type is usually present before the onset of symptoms in RA?

<p>Cyclic citrullinated peptide (anti-CCP) antibodies</p> Signup and view all the answers

What is reversed by blocking TNF according to the text provided?

<p>Defect in T regulatory cell suppressive function</p> Signup and view all the answers

Which factor has been suggested as one of the initiating causes of Rheumatoid Arthritis (RA)?

<p>Citrullination process triggered by bacterial infections</p> Signup and view all the answers

What is the main effect of anti-CCP antibodies in Rheumatoid Arthritis (RA)?

<p>Promotion of osteoclast differentiation and activation</p> Signup and view all the answers

Which cells undergo a special form of cell death called 'NETosis' in the context of Rheumatoid Arthritis (RA)?

<p>Neutrophils</p> Signup and view all the answers

What is the primary composition of synovial tissue in Rheumatoid Arthritis (RA)?

<p>Macrophages (40%), Fibroblast and endothelial cells (10-15%), T lymphocytes (40%)</p> Signup and view all the answers

Which molecular mechanism leads to joint space narrowing in Rheumatoid Arthritis (RA)?

<p>Enhanced NETosis with release of citrullinated proteins</p> Signup and view all the answers

What effect does citrullinated protein release through NETosis have on Rheumatoid Arthritis (RA)?

<p>'NETosis' leads to biomechanical dysfunction and bone erosion</p> Signup and view all the answers

Which mechanism is proposed to explain the role of anti-CCP immune complexes in enhancing inflammation in mice with mild synovitis?

<p>Activation of inflammatory cells</p> Signup and view all the answers

What is a potential effect of anti-CCP immune complexes in inducing inflammation in the context of rheumatoid arthritis?

<p>Production of NETs by neutrophils</p> Signup and view all the answers

How do anti-CCP immune complexes contribute to the development and severity of inflammation in mice with mild synovitis?

<p>By activating inflammatory cells</p> Signup and view all the answers

What is a potential consequence of anti-CCP immune complexes interacting with inflammatory cells?

<p>Activation of osteoclast differentiation</p> Signup and view all the answers

How do anti-CCP immune complexes contribute to the severity of inflammation in mice with mild synovitis?

<p>By enhancing NET production from neutrophils</p> Signup and view all the answers

Which process is implicated in the ability of anti-CCP immune complexes to exacerbate inflammation in cases where mild synovitis is present?

<p>Inducing citrullination of proteins</p> Signup and view all the answers

What is the primary characteristic of rheumatoid arthritis (RA) compared to healthy inflammation?

<p>Occurrence of joint destruction</p> Signup and view all the answers

Which autoantibodies are often present in individuals with RA?

<p>Rheumatoid factor (RF)</p> Signup and view all the answers

What is the significance of Cyclic citrullinated peptide (anti-CCP) antibodies in RA?

<p>They accelerate joint destruction</p> Signup and view all the answers

How do women differ from men in terms of risk related to autoimmunity in RA?

<p>Women are at a higher risk of developing autoimmunity</p> Signup and view all the answers

What does citrullination refer to in the context of RA?

<p>A process involving the conversion of arginine to citrulline</p> Signup and view all the answers

How does the presence of anti-CCP antibodies impact the diagnosis and management of RA?

<p>It increases the accuracy of diagnosis when combined with other clinical tests</p> Signup and view all the answers

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