Immune System and Autoimmune Diseases
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Questions and Answers

Which condition is NOT classified under spondyloarthritis?

  • Psoriatic arthritis and spondylitis
  • Osteoarthritis (correct)
  • Reactive arthritis
  • Ankylosing spondylitis (AS)
  • What is a hallmark feature of ankylosing spondylitis's pathology?

  • Erosion of peripheral joints
  • Acute inflammation of muscle tissue
  • Gradual replacement of eroded joint margins with ossification (correct)
  • Significant involvement of synovial fluid
  • Which cytokine is central to the immunopathogenesis of ankylosing spondylitis?

  • IL-10
  • IL-6
  • IFN-γ
  • TNF-α (correct)
  • What is true regarding laboratory tests for ankylosing spondylitis?

    <p>No single laboratory test can definitively diagnose AS (A)</p> Signup and view all the answers

    Which area is primarily affected by ankylosing spondylitis?

    <p>Axial skeleton (B)</p> Signup and view all the answers

    Which statement regarding adaptive and innate immunity is correct?

    <p>Innate immunity is found in both vertebrates and invertebrates. (C)</p> Signup and view all the answers

    Which of the following cells is not part of the innate immune system?

    <p>B lymphocytes (A)</p> Signup and view all the answers

    What is a key property of the normal immune system?

    <p>Immune memory for rapid recall responses. (B)</p> Signup and view all the answers

    Which statement about autoimmune diseases is incorrect?

    <p>Autoimmunity is present in all individuals. (C)</p> Signup and view all the answers

    What are the main directions in treating autoimmune diseases?

    <p>All mentioned approaches are important. (B)</p> Signup and view all the answers

    Which statement about Rheumatoid arthritis (RA) is incorrect?

    <p>It is a completely localized disease without systemic issues. (C)</p> Signup and view all the answers

    What is true about the incidence of RA?

    <p>Patients may experience morning joint stiffness lasting longer than 1 hour. (A)</p> Signup and view all the answers

    Which immune system feature best supports its ability to recognize diverse pathogens?

    <p>A highly diverse repertoire of antigen receptors. (A)</p> Signup and view all the answers

    Which method is predominantly used for the diagnosis of rheumatoid arthritis (RA)?

    <p>Diagnosis involves a combination of signs, symptoms, laboratory tests, and radiographic results (A)</p> Signup and view all the answers

    Which statement regarding the antibody profiles in rheumatoid arthritis is accurate?

    <p>Anti-CCP antibodies carry higher specificity for the diagnosis of RA compared to RF (D)</p> Signup and view all the answers

    Which of the following statements about systemic lupus erythematosus (SLE) is true?

    <p>The disease can develop in any gender but predominantly affects women of child-bearing age (B)</p> Signup and view all the answers

    What is a common clinical manifestation of systemic lupus erythematosus?

    <p>Photosensitivity and oral ulcers as typical findings (A)</p> Signup and view all the answers

    What is incorrect regarding the immunologic manifestations of systemic lupus erythematosus?

    <p>A positive Coombs test is definitive for the diagnosis of SLE (C)</p> Signup and view all the answers

    Which of the following is considered a life-threatening therapy for SLE?

    <p>Cyclophosphamide, often used as a last resort (D)</p> Signup and view all the answers

    Which statement about the histological features in SLE is incorrect?

    <p>Histological abnormalities can only be observed in renal tissue (A)</p> Signup and view all the answers

    Which of the following statements about systemic sclerosis is true?

    <p>Systemic sclerosis can lead to skin and organ fibrosis (D)</p> Signup and view all the answers

    What is a characteristic feature of "Mauskopf" appearance in Sjögren's syndrome?

    <p>Loss of wrinkles and taut, shiny skin. (B)</p> Signup and view all the answers

    Which of the following is NOT a clinical manifestation of Sjögren's syndrome?

    <p>Ability to speak continuously and effortlessly. (A)</p> Signup and view all the answers

    What is a key characteristic of Spondyloarthritides (SA)?

    <p>They share certain clinical features and genetic associations. (C)</p> Signup and view all the answers

    What is the primary site of inflammation in Ankylosing Spondylitis (AS)?

    <p>Axial skeleton, especially the spine. (C)</p> Signup and view all the answers

    What is the pathogenesis of Ankylosing Spondylitis (AS)?

    <p>It is an autoimmune disease, where the body's immune system attacks the joints. (D)</p> Signup and view all the answers

    What is a common characteristic of Ankylosing Spondylitis (AS)?

    <p>The early stage is often characterized by pain and inflammation in the sacroiliac joints. (D)</p> Signup and view all the answers

    What is a characteristic of Ankylosing Spondylitis (AS) that can be a major health issue for patients?

    <p>The increased inflammation can cause the spine to fuse, leading to a loss of mobility and deformity. (D)</p> Signup and view all the answers

    What is true about Vasculitis?

    <p>Vasculitis can be caused by a variety of factors, including infections, autoimmune disorders, and certain medications. (D)</p> Signup and view all the answers

    Flashcards

    Adaptive Immunity Location

    Adaptive immunity is found only in vertebrates.

    Innate Immunity Location

    Innate immunity is found in both vertebrates and invertebrates.

    Cells of Innate Immune System

    Cells of the innate immune system include NK cells, monocytes, macrophages, and others excluding B lymphocytes.

    Key Properties of Immune System

    The normal immune system has diverse antigen receptors, memory, and tolerance.

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    Autoimmune Disease Features

    Autoimmunity involves tissue injury from immune reactions against self-tissues.

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    Treatment Directions for Autoimmunity

    Main treatments include suppressing autoimmunity, restoring regulatory functions, and inhibiting effects.

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    Rheumatoid Arthritis Gender Difference

    Rheumatoid arthritis is more common in females than males.

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    Rheumatoid Arthritis Symptoms

    RA causes morning stiffness in joints lasting over 1 hour, improving with activity.

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    Xerotrachea

    Dryness in the nose, throat, and trachea.

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    Spondyloarthritis types

    Includes ankylosing spondylitis, reactive arthritis, and psoriatic arthritis, but not RA.

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    Ankylosing spondylitis effects

    Primarily affects the axial skeleton, not peripheral joints.

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    Pathology of Ankylosing Spondylitis

    Sacroiliitis often starts early; joints can get obliterated.

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    Pathogenesis of Ankylosing Spondylitis

    TNF-α is crucial; elevated IL-23 and IL-17 in patients.

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    Mauskopf appearance

    Characterized by taut, shiny skin and loss of wrinkles.

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    Sjögren’s syndrome characteristics

    A chronic disease with lymphocytic infiltration of exocrine glands, causing dryness.

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    Clinical signs of Sjögren’s syndrome

    Includes oral dryness, difficulty swallowing, and burning sensation but not continuous speaking.

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    Spondyloarthritides (SA)

    Group of overlapping disorders with common clinical features, inflammatory in nature.

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    Ankylosing spondylitis (AS) affected areas

    Primarily affects the axial skeleton, but can also involve peripheral joints and extraarticular structures.

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    Genetic factors in AS

    Genetics play a role in susceptibility to Ankylosing spondylitis; male predominance exists.

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    Vasculitis definition

    A process involving inflammation and damage to blood vessels, may be primary or secondary.

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    Clinical features of Sjögren’s syndrome

    Common features include dryness; skin covered with sweat is incorrect.

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    Rheumatoid Arthritis (RA)

    An autoimmune disease primarily affecting joints, leading to chronic inflammation.

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    Anti-CCP antibodies

    Autoantibodies specific for diagnosing rheumatoid arthritis with high specificity.

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    Systemic Lupus Erythematosus (SLE)

    An autoimmune disease characterized by multi-organ involvement and abnormal immune responses.

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    Gene-environment interactions in SLE

    Interactions that lead to abnormal immune responses in susceptible individuals.

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    Clinical manifestations of SLE

    Includes cutaneous rashes, hematologic changes, and renal issues.

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    Pathognomic immunologic markers for SLE

    Markers like Anti-ds DNA and Anti-Sm are highly indicative of SLE.

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    Life-threatening therapies for SLE

    Includes systemic glucocorticoids, cyclophosphamide, and other immunosuppressants.

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    Extraarticular manifestations

    Symptoms or complications outside of the joints, like those found in Sjogren's syndrome.

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    Study Notes

    IMMUNE SYSTEM AND AUTOIMMUNE DISEASES

    • Adaptive immunity is found only in vertebrates
    • Innate immunity is found in both vertebrates and invertebrates
    • Cells of the innate immune system include natural killer (NK) cells, monocytes/macrophages, neutrophils, basophils, eosinophils, dendritic cells, and tissue mast cells, and epithelial cells. B lymphocytes are not part of the innate system
    • The normal immune system has a diverse repertoire of antigen receptors, enabling recognition of a wide range of pathogens. It also has immune memory to rapidly respond to encountered pathogens. Immunologic tolerance prevents the immune system from attacking normal self-tissues.
    • Autoimmune diseases involve the immune system attacking the body's own tissues. The injury mechanisms can be divided into antibody-mediated and cell-mediated processes
    • Key aspects of the treatment of autoimmune disease, involve suppressing autoimmunity, and restoring normal regulatory mechanisms within the immune system in addition to inhibiting the effector mechanisms
    • Rheumatoid arthritis (RA) is more common in women than men, and affects synovial tissue, underlying cartilage, and bone. Periarticular osteopenia often occurs in joints with active inflammation in RA
    • RA is not a systemic disease
    • RA patients often experience early morning joint stiffness lasting more than 1 hour, which eases with physical activity. Early involved joints are often the larger joints
    • Diagnosis of RA is frequently based on a combination of signs, symptoms, and laboratory tests, including chronic inflammatory arthritis, laboratory tests, and radiographic results
    • Anti-CCP antibodies are highly specific for RA
    • Rheumatoid factor (RF) is present in the serum of some RA patients in the form of antibodies such as IgM, IgG, and IgA
    • White blood cell (WBC) counts in synovial fluid can vary between 5000 and 50,000
    • Systemic lupus erythematosus (SLE) is an autoimmune disease impacting 90% of patients in their childbearing years. Interactions between susceptibility genes and environmental factors can lead to abnormal immune responses in SLE
    • SLE involves the formation of pathogenic autoantibodies and immune complexes that deposit in tissues, leading to inflammation and potential irreversible organ damage over time
    • Histological abnormalities (biopsy) can be found in tissue such as those in skin and kidneys in SLE
    • The symptoms of SLE and the best treatment are often determined by biopsy analysis. Analysis of renal biopsies is important for determining the proper therapy and for diagnosis specifically in SLE cases

    OTHER CONDITIONS

    • Systemic sclerosis (SS) includes symptoms such as taut, shiny skin, loss of wrinkles, an expressionless face, and reduced oral aperture (microstomia). In addition, thinning of the lips and fine wrinkles around the mouth are seen in SS.
    • Sjögren's syndrome is a chronic autoimmune disease characterized by dysfunction of lacrimal and salivary glands.
    • Spondyloarthritides (SA) are a group of overlapping disorders including ankylosing spondylitis (AS), characterized by inflammation primarily affecting the axial skeleton (bones of the spine and rib cage) and thus, in the extraarticular structures as well
    • The most common location in Ankylosing spondylitis (AS) cases begins in the sacroiliac joints and then spreads to involve other joints, often causing the spine to fuse,
    • Vasculitis is an inflammation and damage of the blood vessels, which may be primary or secondary.
    • TNF-alpha, IL-23, and IL-17 potentially play a key role in immunopathogenesis of AS. CD4+ and CD8+ T cells and macrophages may be observed within an inflamed sacroiliac joint
    • Symptoms of conditions like temporal arteritis often include headaches, pain, and reduced vision if not properly treated. Systemic lupus erythematosus may show up in some cases as symptoms like kidney issues, fatigue, skin rashes, etc.

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    Explore the complexities of the immune system, including adaptive and innate immunity. Learn about various immune cells and their roles, as well as the mechanisms behind autoimmune diseases and their treatments. This quiz will deepen your understanding of how the immune system protects the body and how it can malfunction.

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