• Janaína Artem Ataide, Letícia Caramori Cefali, Marcia de Araujo Rebelo, Lívia Genovez Spir, Elias Basile Tambourgi, Angela Faustino Jozala, Marco Vinícius Chaud, Edgar Silveira, Xiaochen Gu, and Gava MazzolaPriscilaPFaculty of Pharmaceutical Sciences, State University of Campinas (UNICAMP), Campinas, Brazil..
• Postgraduate Program in Medical Sciences, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, Brazil.
• Planta Med. 2017 Jul 1; 83 (10): 870-876.

AbstractAn ideal wound dressing ensures a moist environment around the wound area and absorbs exudates from the wound surface. Topical application of bromelain to incised wounds has been shown to reprogram the wound microenvironment to promote effective tissue repair. Combining the characteristics of hydrogels and bromelain is therefore of great interest. Herein, we describe the development of a hydrogel, formulated using alginate and Arabic gum, for bromelain loading and release. The hydrogel formulation was evaluated using response surface methodology, considering the pH value and the concentration of alginate and Arabic gum. Bromelain loading and release were evaluated based on passive diffusion. Differential scanning calorimetry and Fourier transform infrared spectroscopy were performed to confirm bromelain immobilization in the hydrogel. The final hydrogel formulation had a swelling ratio of 227 % and incorporated 19 % of bromelain from a bromelain solution. Bromelain immobilization in the hydrogel was the result of hydrogen bond formation and was optimal at 4 °C after 4 h of contact. This evidence suggests that bromelain entrapment into a hydrogel is a promising strategy for the development of wound dressings that support the debridement of burns and wounds.Georg Thieme Verlag KG Stuttgart · New York.

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