Dendritic cells which are originated from the cells of the bone marrow are distributed throughout the body and are the starter in adaptive immune responses. Imma- ture dendritic cells become mature ones after the stimulation by antigen, and then mature dendritic cells apoptosis are occurred after they presenting antigen to T cells, which maintains the dynamic balance of the dendritic cells. The phenomenon is quite similar to TCM primordial qi. The number changes and function damages of the dendritic cells are also simi- lar to primordial qi when the pathogens invade organism. So it may be thou...
