| abstract |
A method for entrapping migratory antigen presenting cells (APCs) and particularly Langerhans cells (LCs,) in vivo provided. The method entails creating an artificial gradient of APC-attracting chemotactic factor in the homing path of APCs in vivo. Also provided is a composition for entrapping APCs and particularly, migratory LCs. In addition, a method for loading APCs in situ with antigen is provided. The method comprises entrapping APCs in vivo and subsequently loading the APCs in situwith antigen. Correspondingly, a composition for loading APCs in situ is also is also provided. Further provided is a method for stimulating the migration of entrapped APCs to draining lymph nodes. The ability to stimulate the migration of entrapped APCs to draining lymph nodes is useful, internalia) for regulating an immune response in a subject. In addition, an in situ APC-based vaccine is provided which does not require any time-consuming, costly ex vivo manipulations. |