Detection of enhanced cytotoxic T lymphocyte response with spleenic dendritic cells enriched by a simple sequential adherence method.

Dendritic cells (DC), which are present in many tissues, play a critical role in the initiation of the immune response by presenting antigens to T and B lymphocytes. DC are present in tissues as a minority cell type as compared to other APCs. Although clearly distinguished by morphology and surface markers, dendritic cells are difficult to isolate and multiple step procedures including Percoll/Hypaque or BSA gradient centrifugation have been used. Here we describe a simple method for isolating an enriched population of dendritic cells from mouse spleen by sequential adherence to petri dishes. The purity of dendritic cells enriched thereby was found to be above 70%. The identity of these cells was confirmed to be DC by morphology, presence of surface markers, and their functions, e.g., strong allogeneic MLR reaction and induction of antigen-specific cytotoxic T lymphocyte response.