Abstract: A diagnostic test for celiac disease is disclosed. In particular, the invention relates to a method of diagnosing celiac disease by detecting activated, gut-bound CD8+ alpha-beta T lymphocytes and gamma-delta T lymphocytes in the peripheral blood of a subject who has consumed gluten for one to three days. This diagnostic test has a number of advantages over current tests for celiac test, including that the test is noninvasive, relatively inexpensive, and requires voluntary gluten ingestion over a short period of time.

Abstract: The invention relates to methods for modulating the immune function through targeting of CLIP molecules as well as gamma delta T-cells. The result is wide range of new therapeutic regimens for treating, inhibiting the development of, or otherwise dealing with, a multitude of illnesses and conditions, including autoimmune disease, transplant and cell graft rejection, cancer, bacterial infection, HIV infection, and AIDS, as well as novel methods of diagnosis and of introducing a treatment regimen into a subject.