Acta cirurgica brasileira · 2026
Biocompatibility, biodegradation, and antioxidative potential of alginate-dragon's blood sap microbeads implanted subcutaneously in mice.
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Carvalho Diego Armando Leite, Marques Gustavo Sousa, Macêdo Yanna Ribeiro, Castro-Silva Igor Iuco
Аннотация
PURPOSE: To evaluate alginate-dragon's blood sap microbeads (DBSM) regarding biocompatibility, biodegradation, and antioxidative potential.
METHODS: Three DBSMs at concentrations of 1, 2, and 5% were developed by the drop spherification, and alginate-1% glycerin microbeads (GM) were used as control. Biocompatibility and biodegradation were evaluated by subcutaneous assay in 50 Swiss male mice, divided in the groups G1 (1% DBSM), G2 (2% DBSM) and G3 (5% DBSM), which were compared to C+ (1% GM) and C- (sham) at three and nine weeks. The histopathology of tissue irritation followed the ISO 10993-6 standard and the integrity of the biomaterials scored by quartiles. Metabolic analysis of intensity of catalase was carried out in the liver, kidneys, and tibias of the tested animals.
RESULTS: All microbeads were biocompatible, with less tissue irritation and greater partial resorption in G3 in subcutaneous tissue and preserved systemic antioxidant potential.
CONCLUSION: The controlled release of dragon's blood sap from Croton lechleri using alginate microbeads suggests a local anti-inflammatory action dependent on the concentration of the bioactive compound. Its role in repairing specialized connective tissues such as bone should be elucidated by future in-vivo orthotopic tests.
METHODS: Three DBSMs at concentrations of 1, 2, and 5% were developed by the drop spherification, and alginate-1% glycerin microbeads (GM) were used as control. Biocompatibility and biodegradation were evaluated by subcutaneous assay in 50 Swiss male mice, divided in the groups G1 (1% DBSM), G2 (2% DBSM) and G3 (5% DBSM), which were compared to C+ (1% GM) and C- (sham) at three and nine weeks. The histopathology of tissue irritation followed the ISO 10993-6 standard and the integrity of the biomaterials scored by quartiles. Metabolic analysis of intensity of catalase was carried out in the liver, kidneys, and tibias of the tested animals.
RESULTS: All microbeads were biocompatible, with less tissue irritation and greater partial resorption in G3 in subcutaneous tissue and preserved systemic antioxidant potential.
CONCLUSION: The controlled release of dragon's blood sap from Croton lechleri using alginate microbeads suggests a local anti-inflammatory action dependent on the concentration of the bioactive compound. Its role in repairing specialized connective tissues such as bone should be elucidated by future in-vivo orthotopic tests.