In vitro human T cell responses to diphencyprone.

Conflicts of interest: The authors declare no conflict of interest. Funding: This work was supported by internal departmental research funds. C. Lai is a Wellcome Trust Research Training Fellow. viral warts and alopecia areata (1–4). It is also used as an experimental tool for investigatation of human immune responses; the contact allergic reactions elicited by DPCP patch tests can be quantified objectively, and the effects of stress, such as intense physical exertion (5), altitude (6), or coexisting human immunodeficiency virus infection (7), can be determined. In order to address possible mechanisms underlying altered immune responses, it is essential to have in vitro systems that allow analysis of the cellular elements involved in the response, such as effector/memory T cells and regulatory T cells. So far,