Introduction to Autoimmunity Quiz

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Questions and Answers

What is the primary function of B cells in autoimmune conditions?

  • To facilitate cell signaling
  • To produce autoantibodies (correct)
  • To prevent inflammation
  • To modulate immune response

What consequences arise from the breakdown in 'self' versus 'non-self' recognition?

  • Enhanced healing processes
  • Increased self-tolerance
  • Heightened immune defense mechanisms
  • Development of autoimmune reactions (correct)

How do T cells contribute to autoimmune conditions?

  • They exclusively produce cytokines
  • They enhance self-tolerance
  • They inhibit immune responses
  • They activate B cells to produce antibodies (correct)

What is the role of autoantibodies in autoimmune diseases?

<p>To bind to self-antigens and form immune complexes (A)</p> Signup and view all the answers

What is the end result of T cells not recognizing 'self' cells?

<p>Attack on host cells (B)</p> Signup and view all the answers

Which physiological mechanism can potentially alter an autoimmune response?

<p>Homeostatic compensation techniques (B)</p> Signup and view all the answers

What do immune complexes formed by autoantibodies do in tissues?

<p>They cause localized inflammation (D)</p> Signup and view all the answers

Which diagnostic test is not indicated for the client at this time?

<p>CT scan of the brain (D)</p> Signup and view all the answers

What critical information does a complete metabolic panel (CMP) provide?

<p>Fluid and electrolyte balance (A)</p> Signup and view all the answers

What role does histopathology from a biopsy play in diagnosing SLE?

<p>Assesses immune activity in affected tissue (C)</p> Signup and view all the answers

Which ethnicity has the highest prevalence of systemic lupus erythematosus (SLE)?

<p>African-American (C)</p> Signup and view all the answers

Which factor is suggested to play a role in the higher prevalence of SLE among females?

<p>Hormonal influences (D)</p> Signup and view all the answers

What common environmental trigger is associated with the onset of SLE?

<p>Ultraviolet (UV) exposure (B)</p> Signup and view all the answers

Which genetic link is associated with increased prevalence of SLE?

<p>Major histocompatibility complex (MHC) locus (C)</p> Signup and view all the answers

How does the presence of risk factors affect the likelihood of developing SLE?

<p>Increases likelihood but does not guarantee onset (C)</p> Signup and view all the answers

What is the primary monitoring priority in clients with lupus nephritis?

<p>Renal function (D)</p> Signup and view all the answers

What occurs during lymphocyte maturation in a healthy immune system?

<p>Elimination of autoreactive lymphocytes (B)</p> Signup and view all the answers

Which of the following is considered a systemic autoimmune disease?

<p>Systemic Lupus Erythematosus (SLE) (B)</p> Signup and view all the answers

How do autoimmune diseases primarily impact the body?

<p>They generate immunologic reactions against host tissues. (C)</p> Signup and view all the answers

Which of these is a hallmark of autoimmune disorders like Systemic Lupus Erythematosus?

<p>Immunologic reaction mediated by autoantibodies (D)</p> Signup and view all the answers

Which type of autoimmune disease affects the central nervous system?

<p>Multiple Sclerosis (C)</p> Signup and view all the answers

What triggers the immune response in individuals with SLE?

<p>Infectious or environmental factors in predisposed individuals (B)</p> Signup and view all the answers

Which condition is NOT categorized under autoimmune diseases?

<p>Hypertension (C)</p> Signup and view all the answers

What initiates the immune response in genetically predisposed individuals?

<p>Environmental exposure trigger (C)</p> Signup and view all the answers

Which process occurs after environmental exposure triggers in autoimmune disorder development?

<p>Immune complex formation and deposition in tissues (D)</p> Signup and view all the answers

What is a hallmark of systemic lupus erythematosus (SLE)?

<p>Autoantibodies production (C)</p> Signup and view all the answers

What role does the complement system play in autoimmune disorders?

<p>It causes cell lysis and inflammation (A)</p> Signup and view all the answers

In the context of lupus nephritis, what must be prioritized for monitoring?

<p>Renal function (D)</p> Signup and view all the answers

Which of the following is NOT part of the pathophysiological events leading to autoimmunity?

<p>Cell lysis (C)</p> Signup and view all the answers

What is the outcome of immune complexes depositing in tissues during autoimmune diseases?

<p>Activation of cytokines and complement leading to tissue damage (B)</p> Signup and view all the answers

What is likely the first step in the cascade leading to autoimmunity?

<p>Environmental exposure triggers causing cell damage (A)</p> Signup and view all the answers

What is the primary role of antimalarial drugs in managing SLE symptoms?

<p>To manage joint pain, skin rashes, and fatigue (B)</p> Signup and view all the answers

Which of the following is NOT a recommended lifestyle adjustment for living with SLE?

<p>Maintaining a diet high in refined sugars (D)</p> Signup and view all the answers

What is the consequence of T lymphocytes becoming sensitized to self-antigens in Graves' disease?

<p>Increased production of thyroid-stimulating immunoglobulin (TSI) (C)</p> Signup and view all the answers

In the case of severe SLE, which treatment approach may be considered?

<p>Immunosuppressive and chemotherapeutic agents (A)</p> Signup and view all the answers

What is a clinical manifestation of hyperthyroidism in Graves' disease?

<p>Periodic palpitations and unexplained weight loss (C)</p> Signup and view all the answers

What is the primary way to assess for suspected organ involvement in SLE?

<p>Imaging studies (A)</p> Signup and view all the answers

What factor is NOT pivotal for effectively managing SLE?

<p>Complete elimination of all physical activity (C)</p> Signup and view all the answers

What role does thyroid-stimulating immunoglobulin (TSI) play in Graves' disease?

<p>It mimics TSH and stimulates thyroid hormone synthesis (D)</p> Signup and view all the answers

What is the typical TSH level in clients experiencing primary hyperthyroidism?

<p>Decreased TSH levels (C)</p> Signup and view all the answers

What characterizes Graves’ disease in relation to thyroid hormone production?

<p>Increased production of thyroid hormones (D)</p> Signup and view all the answers

Which test is used to assess for autoimmune etiology in hyperthyroidism?

<p>Thyroid-stimulating hormone receptor antibodies lab tests (A)</p> Signup and view all the answers

What does a radioactive iodine uptake scan assess in individuals with Graves' disease?

<p>Accumulation of iodine in the thyroid gland (D)</p> Signup and view all the answers

How does Graves' disease primarily alter thyroid hormone levels?

<p>By increasing thyroid hormone production (A)</p> Signup and view all the answers

Which of the following tests is NOT used to directly assess for autoimmune etiology?

<p>Radioactive iodine uptake scan (C)</p> Signup and view all the answers

Which of the following is indicative of hypervascularity in the thyroid gland?

<p>Doppler ultrasound (C)</p> Signup and view all the answers

What is the nature of the disorder in Graves' disease?

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

Flashcards

B cells

A type of white blood cell that produces antibodies, which are proteins that target specific antigens.

Autoantibodies

Special proteins made by B cells that bind to self-antigens, triggering an immune response against the body's own tissues.

T cells

A type of white blood cell that plays a key role in coordinating and regulating the immune response.

Autoimmunity

A malfunction in the immune system's ability to distinguish between self and non-self antigens, leading to an attack on the body's own tissues.

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Self-tolerance

The process by which the immune system learns to tolerate its own tissues and cells.

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Antigens

Molecules that trigger an immune response, such as proteins, carbohydrates, or lipids.

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Autoimmune reaction

An immune response that is directed against the body's own tissues, causing inflammation and damage.

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Immune complexes

Immune complexes formed by the binding of autoantibodies to self-antigens, which can trigger inflammation and tissue damage.

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Systemic Autoimmune Diseases

A group of autoimmune diseases that impact multiple organ systems. Think "systemic" as in "whole body".

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Systemic Lupus Erythematosus (SLE)

A complex autoimmune condition where the immune system attacks the body's own tissues, leading to a wide range of symptoms.

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Lymphocytes

A type of immune cell that helps identify and destroy foreign invaders like bacteria and viruses.

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Autoreactive lymphocytes

Immune cells that attack the body's own tissues mistakenly.

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Antibodies

Proteins produced by the immune system that bind to specific targets, triggering an immune response.

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Lupus nephritis

An inflammatory condition caused by the body's own immune system attacking the kidneys.

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What are immune complexes?

Substances formed when autoantibodies bind to self-antigens, leading to inflammation and tissue damage.

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What is the role of the complement system in autoimmune disorders?

A group of proteins that, when activated, can cause cell lysis and inflammation. They play a role in immune complex-mediated tissue damage in autoimmune diseases.

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What happens when immune complexes deposit in tissues?

Occurs when immune complexes deposit in body tissues, activating cytokines and the complement system, resulting in inflammation, vasculitis, and rash.

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What is lupus nephritis?

A specific type of kidney disease associated with SLE, where immune complexes activate the inflammatory process within the kidneys.

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What is genetic predisposition in autoimmunity?

Preceding the environmental trigger, this indicates a person might be more susceptible to developing an autoimmune disorder.

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What is an environmental exposure trigger in autoimmunity?

This trigger can be an infection or environmental exposure that can kickstart the autoimmune process in someone who is genetically predisposed.

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What is autoantibody production in autoimmunity?

This involves the immune system mistaking self-antigens for foreign invaders, generating autoantibodies that target these self-antigens.

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What is immune complex formation in autoimmunity?

This is a hallmark of autoimmune disorders and involves the immune system targeting its own tissues, forming complexes with self-antigens.

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What are NSAIDs?

A group of medications used to reduce swelling and inflammation in joints, often prescribed for autoimmune diseases like Lupus.

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What are corticosteroids?

These medications help suppress the immune system's overactivity, reducing inflammation and its related symptoms.

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What are antimalarial drugs?

These drugs are usually used to manage autoimmune conditions that affect joints and other organs.

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What are BLyS-specific inhibitors?

These medications specifically target and reduce harmful B cells in the immune system, potentially helping to manage autoimmune conditions like Lupus.

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What kinds of medications are used in severe cases of Lupus?

These drugs are very strong and are used in severe cases where other treatments have failed and major organs are affected.

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What is Graves' disease and what does it affect?

Graves' disease is an autoimmune disorder where the immune system attacks the thyroid gland.

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What is abnormal about the immune system in Graves' disease?

In Graves' disease, the immune system mistakenly attacks the thyroid gland causing it to produce too much thyroid hormone.

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What is TSI and what does it do?

TSI binds to TSH receptors on thyroid cells, imitating TSH and leading to increased thyroid hormone production. This causes hyperthyroidism, thyroid enlargement, and other symptoms.

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What is the hallmark of primary hyperthyroidism?

A decrease in thyroid-stimulating hormone (TSH) levels, accompanied by an increase in thyroid hormone levels.

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What is Graves' disease?

An autoimmune disorder characterized by the overproduction of thyroid hormones due to the presence of antibodies that stimulate the thyroid gland.

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What is the purpose of TSH receptor antibody lab tests?

A laboratory test that measures the levels of thyroid-stimulating hormone (TSH) receptor antibodies in the blood.

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What is the purpose of a radioactive iodine uptake scan?

A diagnostic test that measures the uptake of radioactive iodine by the thyroid gland, reflecting its activity.

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What is the purpose of a thyroid ultrasonogram with Doppler?

An imaging technique using ultrasound waves to visualize the structure and blood flow within the thyroid gland.

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What is the pathophysiological alteration in Graves' disease?

Increased production of thyroid hormone, caused by thyroid-stimulating antibodies.

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What is the nature of Graves' disease?

It is an autoimmune disorder, not infectious.

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What is the effect of thyroid antibodies in Graves' disease?

The thyroid gland produces increased thyroid hormone, not decreased.

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Complete Metabolic Panel (CMP)

A group of blood tests that assess kidney function, liver function, fluid and electrolyte balance, and albumin levels.

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Why is CMP and Urinalysis important for SLE diagnosis?

SLE can affect various organs, including the kidneys. To assess this, doctors order a CMP and a urinalysis, which analyzes urine for abnormalities.

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Tissue Biopsy

A test that examines a sample of tissue taken from a rash. It helps identify the presence of inflammation and immune activity, which is consistent with SLE.

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ANA Test

A blood test that detects the presence of antinuclear antibodies (ANAs), which are often present in individuals with SLE.

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Genetic Risk Factor for SLE

Individuals with family members diagnosed with autoimmune disorders have a higher chance of developing SLE. This suggests a genetic predisposition to the disease.

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Environmental Triggers for SLE

Environmental factors, such as exposure to ultraviolet (UV) radiation, viral infections, smoking, and certain dietary components, can trigger immune responses in genetically predisposed individuals.

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Gender and SLE

While SLE can occur in both genders, it's significantly more common in females. This suggests a hormonal influence on the development of the disease.

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Study Notes

Introduction to Autoimmunity

  • Autoimmune conditions occur when the immune system mistakenly attacks the body's own cells.
  • This breakdown in recognizing "self" versus "non-self" leads to immune dysfunction.
  • Learning module focuses on disease processes, diagnosis, and treatment associated with autoimmunity.
  • Course outcomes include analyzing pathophysiological mechanisms, examining homeostatic mechanisms, distinguishing risk factors and integrating advanced pathophysiological concepts across the lifespan.

B Cells

  • Produce autoantibodies when activated by T cells that don't recognize "self" cells and activate an immune response.

T Cells

  • Modulate immune activity and are involved in the breakdown of self-tolerance, potentially causing autoimmune reactions.
  • T cells modulate the immune response by recognizing "self" versus "non-self", producing cytokines, and activating B cells.

Autoantibodies

  • Bind to self-antigens, forming complexes that precipitate in tissues, causing inflammation.

Immune Complexes

  • Precipitate in tissues, leading to inflammation and tissue damage.
  • Formed from autoantibodies binding to self-antigens.

Complement System

  • A group of proteins that, when activated, can cause cell lysis and inflammation.

Pathophysiological Events

  • Genetic predisposition plays a role in susceptibility to autoimmune disorders.
  • Environmental triggers (infectious or environmental) cause cell damage, initiating an immune response in genetically predisposed individuals.
  • Autoantibodies are produced when immune cells engulf damaged cells and T cells respond to self-antigens, activating B-cells.
  • Immune complexes form and deposit in tissues.
  • Tissue damage results, including inflammation (vasculitis, rash).

Types of Autoimmune Diseases

  • Systemic autoimmune diseases (e.g., SLE, rheumatoid arthritis, scleroderma, Sjögren syndrome, MCTD)
  • Tissue-specific autoimmune diseases (e.g., endocrine disorders like type 1 diabetes, Hashimoto's Thyroiditis, Graves' Disease; GI autoimmune diseases, celiac disease, Crohn's Disease)
  • Neurological autoimmune diseases (e.g., Multiple Sclerosis, Myasthenia Gravis)
  • Dermatological autoimmune diseases (e.g., Psoriasis)
  • Hematological autoimmune diseases (e.g., Immune Thrombocytopenic Purpura)
  • Musculoskeletal autoimmune diseases (e.g., Ankylosing Spondylitis)

Systemic Lupus Erythematosus (SLE)

  • A complex autoimmune condition impacting various organ systems.
  • Genetic predisposition, environmental triggers (infection, UV exposure), cause cell damage leading to an immune response.
  • Autoantibodies produce immune complexes deposit in tissues.
  • Tissues damage inflammation (vasculitis, rashes).
  • Common clinical manifestation include malaise, fatigue, rash, muscle and joint pain and difficulty breathing.
  • Diagnoses often involve testing for antinuclear antibodies (ANA).

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