Exploratory Study of Natural Killer Cells in Human Skin

Exploratory Study of Natural Killer Cells in Human Skin

Natural Killer (NK) cells play a unique role during innate immune responses as they are able to recognize and eliminate, without specific sensitization, tumors, microbe-infected cells as well as allogeneic cells.In a first time, we will characterize the tissue distribution, the phenotype and the effector functions of NK cells present in the human healthy skin.

Then, we will define whether these parameters are qualitatively/ quantitatively modified in the following skin pathologies: a) atopic dermatitis; b) contact dermatitis; c) psoriasis ; d) lichen planus ; e) GVH (graft versus host disease) ; (f) melanoma.

Inclusion Criteria:

• Age ≥ 18 years.
• Consent obtained after healthy donor or patient information.
• Patients suffering from one of the following diseases: a) atopic dermatitis ; b) contact dermatitis; c) psoriasis ; d) lichen planus ; e) GVH ; f) melanoma.

Exclusion Criteria:

• Age below 18,
• pregnant or breastfeeding women,
• persons under guardianship, persons without social security, prisoners, persons hospitalized without consent on the basis of French laws L. 3212-1 et L. 3213-1. Patients affected by HIV infection, AIDS, Hepatitis A, B or C infection.
• Neutropenia <1000/mm3.
• Thrombopenia <50 000/mm3.