Immunology Notes Dr Najeeb Lectures Pdf New Info

Dr. Najeeb 's immunology lectures are widely used by medical students for their high-yield concepts and hand-drawn illustrations that simplify complex immune pathways. Useful notes typically cover a range of core topics, including the complement system, antibody structure, and hypersensitivity reactions. Core Immunology Topics in Dr. Najeeb’s Lectures

Autoimmunity: Mechanisms of how self-tolerance breaks down.

Immunodeficiencies: Bruton’s agammaglobulinemia (B-cell), DiGeorge syndrome (T-cell), SCID, HIV/AIDS.

4. B-Cells and Antibodies

• Activation: B-cells recognize whole antigens (not processed peptides).
• T-Dependent Activation: B-cell eats antigen, presents it on MHC II to a T-Helper cell. T-Helper cell releases CD40L and Cytokines $\rightarrow$ B-Cell becomes a Plasma Cell (factory for antibodies).
• Antibody Functions (The 5 Isotypes):

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