The invention discloses a porous core-shell
microsphere with thermosensitivity and acid responsiveness and a preparation method of the porous core-shell
microsphere, and belongs to the technical field of biological medicines. The preparation method comprises the following steps: S1, carrying out a reaction on
hyaluronic acid and 3, 3 '-dithiobis (propionyl
hydrazide) to obtain
hydrazide modified
hyaluronic acid HA-TPH; s2, another part of
hyaluronic acid is taken and modified with
sodium periodate, and oxidized modified hyaluronic acid HA-CHO is obtained; s3, dissolving HA-TPH in water, and adding beclomethasone dipropionate to obtain a solution A; dissolving HA-CHO in water, and adding beclomethasone dipropionate to obtain a solution B; s4, the solution A and the solution B are mixed and then dropwise added into
vegetable oil, and spherical gel particles are prepared through an emulsification method; s5, dissolving the shell layer material in
dichloromethane, and then adding
ambroxol hydrochloride and the gel particles to form an electronic injection suspension; and S6, preparing the porous core-shell microspheres by adopting a uniaxial electronic injection method. The microspheres prepared by the invention have both thermosensitivity and acid responsiveness, and the problems of inaccurate release, low
utilization rate and the like of the traditional
dosage form are solved.