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The proliferation and osteogenic differentiation of mesenchymal stem cells (MSCs) needed to be promoted for their use in stem cell-based therapy for large bone defects. This study aimed to prepare porous 2a-2 g scaffolds with antioxidant activity to reduce intracellular reactive oxygen species (ROS), which resulted in promoting the proliferation and osteogenic differentiation of MSCs. A series of novel chemically modified 2a-2 g scaffolds were fabricated by an acid-soluble/alkali-insoluble method. Besides, these 2a-2 g scaffolds had good