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The First JAK Kinase Inhibitor to Be Developed, Tofacitinib, Inhibits γ\gamma

question 14

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The first JAK kinase inhibitor to be developed, tofacitinib, inhibits JAK1 and JAK3. These two JAK kinases are required for the signaling pathways induced by multiple cytokines, including all of the receptors that share the cytokine receptor common gamma chain ( γ\gamma c; includes the receptors for IL-2, IL-4, IL-7, IL-9, IL-15, and IL-21) , all of the receptors that share gp130 (includes the receptor for IL-6) , the receptors for GM-CSF, IL-12, and IL-23, and both type I and type II (i.e., IFN- γ\gamma ) interferon receptors. Tofacitinib has recently been shown to be effective in the treatment of severe rheumatoid arthritis, an autoimmune disease characterized by inflammation of the joints with prominent inflammatory cell infiltrates, autoantibodies, and eventual cartilage and bone destruction. A likely explanation for the therapeutic benefits of tofacitinib in this disease is:

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Definitions:

Number of Channels

Refers to the methods or pathways through which a product or service is distributed from the manufacturer or provider to the consumer.

Queue Discipline

The policy or rule set dictating the order in which tasks or customers are serviced, such as first-come-first-served or priority-based.

Continuous Probability

A type of probability distribution where the random variable can take an infinite number of values within a given range.

Waiting Line

Queues formed when the demand for a service exceeds the immediate capacity to provide it, necessitating wait times for service completion.

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