Tocilizumab is a monoclonal antibody that blocks the receptor for which pro-inflammatory cytokine?
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Correct answer: IL-6
Tocilizumab binds to both soluble and membrane-bound IL-6 receptors. IL-6 plays a key role in the pathogenesis of rheumatoid arthritis and cytokine release syndrome (CRS), making its blockade clinically valuable.
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