“…Mostly natural polysaccharides have been investigated as biomaterials, such as chitosan [5,7,31], cellulose [32], collagen [33,34], and hyaluronic acid [35][36][37]. Chitin/poly(lactic acid-co-glycolic acid) (PGLA) blends [38] and starch-based blends [39,40] have been reported for protein drug delivery and tissue engineering scaffolds, respectively. A crosslinked hyaluronic acid hydrogel has been loaded with bioactive cytokines and successfully induced angiogenesis [36].…”