<prompt> The following interleukin is characteristically produced in a TH1 response?IL-2IL-4IL-5IL-10  <response>: After coming in contact with antigen presenting cells, CD4 helper T cells secrete IL-2 and expresses high-affinity receptors for IL-2. IL-2 is a growth factor that acts on these T lymphocytes and stimulates their proliferation, leading to an increase in the number of antigen-specific lymphocytes. 