Zusammenfassung der Ressource
Introduction to Immunology
- Immune system
- Not a specific organ or tissue
- Include various cells, tissue and organs
- Working collectively
- Defend against harmful pathogens, cells and subtances
- Cell of the immune system
- Leukocytes
- Have nuclei
- Involves in phagocytosis, inflammation,adaptive immune response
- Platelets
- Do not have nuclei
- Involved in inflammation and blood clotting
- Lines of denfence
- First line
- External physical barriers
- e.g: skin
- Second line
- Internal physiology barriers
- e.g: inflammation
- create hostile environment for the invaders
- 4 components
- Fever
- Initiated by pyrogens
- Change the settings of hypothalamus
- Benefits
- Reduced iron availability
- Inhibition of microbial multiplication
- Increase metabolic rate
- Inflammation
- Classical symptoms
- Redness
- heat
- Pain
- Odema
- Releases of cytokinese
- Vasodilation
- Phagocytosis
- Phagocytes
- Possess lysosome
- Antimicrobial proteins
- Complement system
- Consists 30 proteins
- Work in cascade reactions to destroy pathogens
- 3 pathways
- Classical
- Lectin
- Alternative
- Interferons
- Are cytokines involved in immune regulation, particularly against viruses
- 3 Major types
- IFN-alpha
- IFN-beta
- IFN-Gamma
- Iron binding proteins
- Many pathogens require iron for enzyme activities
- Limit their growth
- Hemoglobin, Lactoferrin ,Transferrin
- Antimicrobial peptides
- Short proteins less than 50 peptides
- Kills bacteria by inserting themselves into the membranes
- Examples
- Bacteriocins
- Defensins
- Magainins
- Protegrins
- Third line
- Adaptive immune response
- Component of immune system
- Cardiovascular system
- Heart and blood vessels
- Mononuclear Phagocyte System
- Network of reticular fibre
- Phagocytes (macrophages)
- Lymphatic system
- Organs
- Primary lymphoid organs
- Bone marrow & thymus
- Production sites of immune system
- Maturation sites for immune system in the absence of antigen
- Secondnary lymphoid organs
- Adenoid,Tonsils,Lymph nodes, Spleen ,MALT
- Maturation sites for antigen driven immune cells
- Lymph circulatory system
- Lymphatic vessels