Final answer:
The cytokine responsible for plasmacytoid dendritic cell differentiation is IL-3. Th2 cells aid in antibody responses by secreting cytokines, and interleukins are vital for lymphocyte production and immune responses.
Step-by-step explanation:
The cytokine involved in the differentiation of plasmacytoid dendritic cells is IL-3. Interleukins, such as IL-3, play a crucial role in immunological functions including the differentiation and maturation of immune cells. In an innate immune response, T cells secrete various cytokines that promote the maturation of B cells into antibody-producing plasma cells, and IL-3 is instrumental in the differentiation process of dendritic cells. Moreover, Th2 cells are T cells that secrete cytokines aiding antibody responses. Interleukins are associated primarily with the production of lymphocytes and are crucial for immune responses.
Macrophages are the phagocytic cells, type III hypersensitivity is induced by the accumulation of immune complexes in tissues and small blood vessels, and dendritic cells are involved in antigen presentation, which is critical for the initiation of the immune response.