IMMUNOGLOBULINS
CLASSICAL ALTERNATE AND LECTIN PATHWAYS
Question
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Function of MIRL
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Adhesion and increased activity of phagocytic cell
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Prevents insertion of C9 into cell membrane
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Cofactor for factor I cleavage of C3b and C4b
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Dissociates C2b or Bb from binding sites
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Explanation:
Detailed explanation-1: -The complement membrane attack complex (MAC) is classically known as a cytolytic effector of innate and adaptive immunity that forms pores in the plasma membrane of pathogens or targeted cells, leading to osmolysis.
Detailed explanation-2: -In response to complement activation, the membrane attack complex (MAC) assembles from fluid-phase proteins to form pores in lipid bilayers. MAC directly lyses pathogens by a ‘multi-hit’ mechanism; however, sublytic MAC pores on host cells activate signalling pathways.
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