Psoriasis Clinical Trial
Official title:
Role of Chemokine and Chemokine Receptor in Psoriasis
This study aims to elucidate the role of Chemokine and chemokine receptor in the pathogenesis of Psoriasis by using human psoriasis skin xenograft SCID mouse model. The hypothesis is that chemokine and chemokine receptor play important roles in psoriasis and establishment of human skin xenograft mouse model provide excellent platform to test the hypothesis.
Chemokines belongs to a large group of small chemotactic proteins (8-11 kilodaltons in size). Upon engagement of chemokine, chemokine receptor can activate downstream intracellular signaling pathways and results in diverse cellular processing such as cytoskeleton reorganization and cell locomotion. Chemokines are chemoattractant factors and can stimulate directional migration of all classes of leukocytes such as T cells. Epidermal keratinocytes in the skin are able to express multiple chemokines that can attract certain leukocytes, such as T cells or dendritic cells (DCs), to migrate to the epidermis. Psoriasis is a type of skin inflammatory diseases that results in misregulated immune system including immune cell infiltration. Keratinocyte secreted chemokine and chemokine receptor on leukocytes have been known to involve in the pathogenesis of psoriasis. However, it is not very clear how chemokines are regulated in keratinocytes and the binding of chemokine to receptor on leukocytes controls the pathogenesis of psoriasis. To better understand the immune regulation of chemokine and chemokine receptor in the molecular mechanism and pathogenesis of psoriasis, the investigators plan to establish human psoriasis skin xenograft mouse model that involves graft of human skin onto immune deficient mice. The human skin, including lesional and non-lesional skins, has been proven to be acceptable to the SCID mice and the phenotype can maintain for a number of months. The advantage of the xenograft model is to that it can preserve the full complexity of human diseases and thus resembles the pathogenesis of human diseases. This model has also been shown with constant efficacy of anti-psoriasis drug in comparison with clinical practice. Thus, this mouse model has great value to help the investigators understand how chemokine and immune cells are regulated in psoriasis. Of particular note is that this model can be used to test therapeutic drug before introduce them into clinical trial. ;
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