Antiinflammatory and antibacterial polytetrahydropyrimidine loaded on degradable thermosensitive hydrogels for treatment of open wounds

Open wound is one of the concerns of modern medicine. The early wound has not been closed, there will be easy to enter the bacteria leading to bacterial infection. When the wound deteriorates further, the inflammation at the wound will continue to strengthen, and eventually become a chronic wound or non-healing wound. Therefore, an antibacterial anti-inflammatory tissue recovery environment will greatly promote the wound healing process. In this work, we prepared a hyaluronic acid/gelatin hydrogel that provides a comfortable recovery environment for wound healing. We also synthesized an anti-bacterial and anti-inflammatory polytetrahydropyrimidine (PTHP) polymer and loaded it into the hydrogel. The PTHP can be released in the hydrogel at a human body temperature of 37 °C, thereby achieving bactericidal and anti-inflammatory effects on the wound. Moreover, the hyaluronic acid/gelatin hydrogel can be degraded automatically at 37 °C. Therefore, PTHP-loaded hyaluronic acid/gelatin hydrogel system is an open wound care material with antibacterial, anti-inflammatory and microenvironment-responsive tissue recovery environment. It is an ideal candidate for the treatment of open wounds.