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114/14/2015 Complement Hugh B. Fackrell & Maria Sawicki.

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Presentation on theme: "114/14/2015 Complement Hugh B. Fackrell & Maria Sawicki."— Presentation transcript:

1 114/14/2015 Complement Hugh B. Fackrell & Maria Sawicki

2 224/14/2015 Complement l Assigned Reading l Content Outline l Performance Ojectives –Key terms –Key Concepts l Short Answer Questions

3 334/14/2015 Assigned Reading l Chapter: 14 pp l Janis Kuby’s Immunology 3rd Ed

4 444/14/2015 Content Outline l Complement Components l Complement Activation l Regulation of Complement l Biological Consequences l Complement Deficiences

5 554/14/2015

6 66

7 77

8 88 Complement system

9 994/14/2015 Phases in the Complement Cascade l Recognition l Activation Amplification l Membrane Attack

10 10 4/14/2015

11 11 4/14/2015 Complement Cascade

12 12 4/14/2015 Complement Activation l Classical pathway l Alternative pathway l Membrane attack complex

13 13 4/14/2015 Complement Components The Classical Pathway

14 14 4/14/2015 Membrane Bound Antigens

15 15 4/14/2015 Soluble Antigen

16 16 4/14/2015

17 17 4/14/2015

18 18 4/14/2015

19 19 4/14/2015 Complement C1q EM

20 20 4/14/2015

21 21 4/14/2015

22 22 4/14/2015

23 23 4/14/2015 C1rC1Sa

24 24 4/14/2015 C1rC1sC

25 25 4/14/2015 C1rC1Sb

26 26 4/14/2015

27 27 4/14/2015

28 28 4/14/2015

29 29 4/14/2015 C4 polypeptide

30 30 4/14/2015 C4 hydrolysed

31 31 4/14/2015 C4 disulfides

32 32 4/14/2015 C4

33 33 4/14/2015 C2a

34 34 4/14/2015 C2b

35 35 4/14/2015 C3

36 36 4/14/2015 C3b

37 37 4/14/2015 C5

38 38 4/14/2015 C5a & C5b

39 39 4/14/2015 C6

40 40 4/14/2015 C7

41 41 4/14/2015 C7 becomes hydrophobic

42 42 4/14/2015 C8

43 43 4/14/2015 C8 in membrane

44 44 4/14/2015 C9

45 45 4/14/2015 C9 pore

46 46 4/14/2015 C5b-9 EM

47 47 4/14/2015 Complement induced Lysis

48 48 4/14/2015

49 49 4/14/2015

50 50 4/14/2015 An Alternative Complement Pathway Part of Innate immunity Activated without Antibody

51 51 4/14/2015 Alternate Vs Classical Paths

52 52 4/14/2015

53 53 4/14/2015

54 54 4/14/2015 Regulation of Complement

55 55 4/14/2015

56 56 4/14/2015

57 57 4/14/2015 Biological Consequences l Cell lysis l Inflammation l Opsonization l Viral neutralization l Solubilization of immune complexes

58 58 4/14/2015

59 59 4/14/2015

60 60 4/14/2015

61 61 4/14/2015

62 62 4/14/2015 Complement Deficiences

63 63 4/14/2015 Performance Objectives

64 64 4/14/2015 Key Terms l alternative pathway anaphyltoxin inactivator anaphylatoxins l C1 C1q C1r C1s l C1 inhibitor (C1-INH), C2 C2a C2b l C3 C3a C3b C3 convertase l C3b/C4b receptor(CR1) C4 C4a 4b l C4 binding protein (C4-bp)

65 65 4/14/2015 l C5 C5a C5b C5 convertase l C6 C7 C8 C9 CD59 l classical pathway amplification phase activation phase membrane attack phase l complement complement system l Factor B Factor D Factor H Factor I

66 66 4/14/2015 l immune adherence membrane attack complex(MAC) opsonization l properdin S protein

67 67 4/14/2015 Key Concepts l Describe the nomenclature of complement components l Draw a concept map of the classical complement cascade l Draw a concept map of the alternate pathway of complement activation l Describe with specific examples the regulation of complement activation

68 68 4/14/2015 l Discuss why the amplification phase in critical to many immune reactions. l Specify the major sources of complement and comment on the genetic control of complemt proteins

69 69 4/14/2015 Short Answer Questions

70 70 4/14/2015 l Complement is involved in antigen- antibody interactions, yet there is no agglutination or precipitation. What does happen? l What are the important functions of complement?

71 71 4/14/2015 l Differentiate between the classical pathway and the alternate pathway of complement activation l Briefly discuss the three stages of the classical pathway of complement activation. What stage is the most important? Why?

72 72 4/14/2015 l What is the difference between complement activation by antigen-IgM complexes and antigen-IgG complexes? l What is the biologic importance of C4a? l What complement components make up C3 convertase and what does it do?

73 73 4/14/2015 l Macrophages have receptors for C3b. What is the biologic significance of this fact? l What is the last complement component to be split into two biologically active fragments? What are their functions?

74 74 4/14/2015 l If the complement cascade is stopped before the membrane attack phase, has complement fulfilled its function in an immune response? –If Yes, Why? –If No? Speculate on the reason for having the membrane attack phase?

75 75 4/14/2015 l What components of the complement system are shared between the classical pathway and the alternative pathway? l Why is it important to tightly control complement activation?

76 76 4/14/2015 DONE!!!


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