摘要：

Compositions for delivery of pharmacologically active agents and methods for their administration are provided. In one embodiment, the compositions include a complex of a polycationic polymer and a pharmacologically active agent in a pharmaceutically acceptable carrier. The compositions in one embodiment permit transport of pharmacologically active compounds across mucosal membranes for systemic delivery. The polycationic polymer may be, for example, a polycationic carbohydrate such as a chitosan or a chitosan salt or derivative. The therapeutic agent a preferred embodiment is a vaccine or a nucleic acid, such as a gene or antisense oligonucleotide. The composition may be provided in different forms such as a solution, dispersion, powder or in the form of microspheres.

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