The invention discloses a
selenium-containing soluble composite microneedle as well as a preparation method and application thereof, and belongs to the technical field of
biological materials and biological medicines, a microneedle forming matrix is selenized
hyaluronic acid and
medicine-loaded tetrahedral framework
nucleic acid, and a substrate part is
polyvinyl alcohol; the preparation method comprises the following steps: step 1, preparation of selenized
hyaluronic acid; step 2, preparation of tetrahedral framework
nucleic acid and
drug loading; and step 3, preparation of the
selenium-containing and
drug-loaded microneedle patch. The selenized
hyaluronic acid is synthesized through a specific chemical method, the selenized hyaluronic acid is used as a substrate to load the
medicine-carrying tetrahedral framework
nucleic acid, and the advantages of high permeability, good
biocompatibility, editability and the like of the tetrahedral framework nucleic acid are utilized, so that the sustained and
controlled release capacity of the microneedle is improved, efficient transdermal delivery of the
medicine is realized, and the application prospect is broad. And pain and discomfort possibly caused by a traditional administration mode are reduced. The invention provides a novel and effective
drug delivery system in the field of
psoriasis treatment.