Which cytokine group is described as a moderator of the immune response?

• A. Interleukins (cytokine)
• B. Chemokines (cytokine)
• C. Interferons (cytokine)
• D. Autocrine (cytokine action)

Answer: (A)

Cytokines that regulate how immune cells talk to each other and coordinate actions act as moderators of the immune response. Interleukins are this regulatory group—they’re produced by leukocytes to influence the behavior of other immune cells, guiding activation, differentiation, and proliferation. This tuning of the response, sometimes boosting or sometimes dampening it as needed, is why interleukins are described as moderators of immunity. For example, different interleukins can promote T-cell growth or shift helper T-cell responses, shaping the overall immune outcome. Chemokines mainly direct cell movement toward infection sites; interferons primarily induce antiviral states and activate various immune cells; autocrine describes a cytokine acting on the same cell that released it, not a distinct group. So interleukins best fit the idea of moderating the immune response.