Immunization and Immune Disorders
Chapter 17: Immunization and Immunoassays
Chapter Summary
Overview of key concepts, methodologies, and terminologies related to immunization and immunoassays.
Significant explorations into various forms of vaccines and their implications in immunotherapy.
Suggested Readings
Vaccines: pgs. 506-510
Passive immunotherapy: pgs. 510-511
Agglutination test: pgs. 513-514
ELISA: pgs. 516-518
Terminology
Vaccine: A biological preparation that provides active acquired immunity to a particular infectious disease.
Vaccination: The act of introducing a vaccine into the body to produce immunity to a specific disease.
Immunization: The process by which an individual's immune system becomes fortified against an agent (pathogen).
Attenuated vaccine: Uses a weakened form of the germ that causes a disease.
Combination vaccine: Contains two or more vaccines in one.
Inactivated vaccine: Consists of killed pathogens.
Toxoid vaccine: Contains toxins produced by bacteria that have been weakened or inactivated.
Attenuation: The process through which a pathogen is weakened.
Hybridomas: Cell lines produced by fusing a specific type of immune cell with a cancer cell, used in producing monoclonal antibodies.
Adjuvant: A substance that enhances the body's immune response to an antigen.
Passive immunotherapy: The administration of antibodies to an individual instead of the induced immune response.
Antiserum: Blood serum with antibody against specific antigens.
Monoclonal Antibodies: Antibodies that are identical and produced from a single clone of cells, capable of targeting a specific antigen.
Serology: The study of blood serum and immune responses in the body.
Immunoassay: A laboratory method used to detect and quantify specific proteins or antibodies in a sample.
ELISA (Enzyme-Linked Immunosorbent Assay): A popular immunoassay technique for detecting and quantifying proteins, often for antibodies in various applications.
Agglutination: The clumping of particles, typically used in blood typing and immune assays.
Hemagglutination: A specific type of agglutination involving red blood cells.
Live vaccine: A vaccine containing a live organism that is attenuated so that it does not cause disease.
Learning Objectives
Compare and Contrast Active and Passive Immunity:
Active Immunity: Immunity that results from the production of antibodies by the immune system in response to the presence of an antigen. Examples: Natural infections, vaccinations.
Passive Immunity: Immunity that results from the transfer of antibodies from one individual to another. Examples: Maternal antibodies passed to a baby through breast milk, administration of antiserum.
Analyze Why Vaccination Works:
Vaccination stimulates the immune system by mimicking an infection. This generates a memory response, enabling quicker and more effective reactions to real infections in the future.
Compare and Contrast Different Types of Vaccines:
Attenuated (Live) Vaccine: Provides a strong immune response; requires fewer doses but may cause disease in immunocompromised individuals.
Inactivated (Killed) Vaccine: Does not provide as strong an immune response as live vaccines and often requires booster doses.
Toxoid Vaccine: Induces immunity against toxins rather than the pathogen itself.
Combination Vaccine: Enhances efficiency by immunizing against multiple diseases with a single vaccine.
Recombinant Vaccine: Uses genetically engineered organisms to produce antigens that stimulate immunity.
Analyze How Monoclonal Antibodies are Produced:
Monoclonal antibodies are created through the fusion of an antibody-producing B cell (from an immune response) with a myeloma (cancer) cell, forming a hybridoma.
These cells can be cloned to produce large quantities of a single type of antibody, useful in various diagnostic and therapeutic applications, such as cancer treatment and disease diagnosis.
Know the Process and Purpose of ELISA:
The ELISA process involves the binding of an antigen to a surface, followed by the addition of a specific antibody linked to an enzyme.
A substrate is introduced, converting into a detectable signal (color change), allowing measurement of the target protein concentration. ELISAs are essential tools for medical diagnostics and research.
Chapter 18: Immune Disorders
Chapter Summary
Overview of disorders related to the immune system, including hypersensitivity, autoimmune diseases, and immunodeficiency disorders.
Suggested Readings
Hypersensitivity: pgs. 526-537
Autoimmune disease: pgs. 538-539
Immunodeficiency disease: pgs. 540-541
Terminology
Hypersensitivity: An exaggerated immune response that can result in tissue damage and disease.
Type I (Immediate): Allergic reactions mediated by IgE, involving histamine release from mast cells (e.g., anaphylaxis).
Type II (Cytotoxic): Antibody-mediated destruction of cells (e.g., hemolytic anemia).
Type III (Immune Complex Mediated): Forming of antigen-antibody complexes that lead to tissue damage (e.g., systemic lupus erythematosus).
Type IV (Delayed): T-cell mediated responses causing delayed reactions (e.g., contact dermatitis).
Allergens: Substances that provoke allergic reactions.
Histamine: A chemical released during allergic reactions that causes symptoms such as itching and swelling.
Mast Cells: Immune cells that release histamine and other substances in response to allergens.
Blood Group Antigens: Molecules on the surface of red blood cells that determine blood type.
Tuberculin: A purified protein derivative used in testing for tuberculosis.
Graft Rejection: An immune response against transplanted tissues or organs.
Contact Dermatitis: A skin reaction resulting from exposure to allergens.
Autograft: A graft taken from one part of a person's body and used in another part.
Isograft: A graft between genetically identical individuals.
Allograft: A graft between genetically different members of the same species.
Xenograft: A graft between different species.
Graft-vs-host disease: A condition post-transplant where the transplanted immune cells attack the host's tissues.
Autoimmune Disease: Disorders where the immune system mistakenly attacks the body’s own cells. Examples include rheumatoid arthritis and type 1 diabetes.
Immunodeficiency Disease: Conditions where the immune system’s ability to fight infections is compromised. Include primary immunodeficiency diseases (congenital) and secondary immunodeficiency (acquired, e.g., HIV/AIDS).
Learning Objectives
Know What Hypersensitivity Is: Understanding the diverse ways immune responses can be overactive and how it may lead to various diseases.
Compare the Four Types of Hypersensitivity: Distinguishing characteristics and mechanisms of the immediate, cytotoxic, immune complex-mediated, and delayed types of hypersensitivity.
What is Autoimmune Disease: Recognition of how the immune system fails to differentiate between self and non-self, leading to autoimmune pathologies.
What is Immunodeficiency and Its Type: Understanding the definitions of immunodeficiency, along with its primary forms, causes, and implications for health.