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<p>CSV import</p> <p><b>New page</b></p><div>{{DISPLAYTITLE:Antibody Opsonization}}<br /> <br /> == Overview ==<br /> [[File:Antibody_Opsonization.svg|thumb|right|Diagram illustrating antibody opsonization]]<br /> &#039;&#039;&#039;Antibody opsonization&#039;&#039;&#039; is a crucial immune process where antibodies bind to the surface of a pathogen, marking it for destruction by [[phagocytes]]. This process enhances the ability of the [[immune system]] to clear infections and is a key component of the [[adaptive immune response]].<br /> <br /> == Mechanism ==<br /> Opsonization involves the binding of [[antibodies]], such as [[immunoglobulin G]] (IgG) or [[immunoglobulin M]] (IgM), to specific [[antigens]] on the surface of a [[pathogen]]. This binding facilitates the recognition and ingestion of the pathogen by [[phagocytic cells]] such as [[macrophages]] and [[neutrophils]].<br /> <br /> === Antibody Binding ===<br /> The [[Fab region]] of the antibody binds to the antigen, while the [[Fc region]] is exposed. The Fc region can then interact with [[Fc receptors]] on the surface of phagocytes, promoting phagocytosis.<br /> <br /> === Phagocytosis ===<br /> Once the antibody-coated pathogen is recognized by Fc receptors, the phagocyte engulfs the pathogen in a process called [[phagocytosis]]. The pathogen is then enclosed in a [[phagosome]], which fuses with a [[lysosome]] to form a [[phagolysosome]], where the pathogen is degraded by [[lysosomal enzymes]].<br /> <br /> == Role in Immunity ==<br /> Antibody opsonization is vital for the clearance of [[extracellular pathogens]] and is particularly important in the defense against [[bacterial infections]]. It also plays a role in the removal of [[apoptotic cells]] and [[immune complexes]].<br /> <br /> == Clinical Significance ==<br /> Deficiencies in opsonization can lead to increased susceptibility to infections. For example, individuals with [[immunodeficiencies]] affecting antibody production or function may experience recurrent infections due to impaired opsonization.<br /> <br /> == Related Pages ==<br /> * [[Antibody]]<br /> * [[Phagocytosis]]<br /> * [[Immune system]]<br /> * [[Adaptive immune response]]<br /> * [[Fc receptor]]<br /> <br /> [[Category:Immunology]]</div>

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