Characterization of Enzymatic Modified Soluble Dietary Fiber from Rhodomyrtus tomentosa fruits: A Potential Ingredient in Reducing AGEs Accumulation

The accumulation of advanced glycation end-products (AGEs) from food matrix in human body can induce health crisis. This study firstly investigated the AGEs accumulation reducing potential of soluble dietary fiber (SDF) from Rhodomyrtus tomentosa fruits in antiglycation and trapping AGEs aspects. To obtain superior functionalities, the SDF was prepared by an enzymatic modified extraction method (ESDF). The result showed the extraction yield of SDF increased by 45% with the Viscozyme L modification. The structural characterizations indicated the enzymatic treatment greatly influenced the monosaccharide composition, thermal stability, crystallinity, and apparent viscosity of Rhodomyrtus tomentosa fruits SDF (RTSDF) as compared with SDF obtained from water extraction method (WSDF). The antioxidant assay indicated that RTSDF could scavenge O 2−∙ ,OH ∙ , and H 2 O 2 radicals and chelate Fe 2+ . Additionally, RTSDF, especially ESDF, reduced the more fluorescent AGEs generation in bovine serum albumin (BSA)-fructose model, and protected the BSA from oxidation and cross-linking. Besides, the RTSDF presented the ability to trap those already formed BSA-bound AGEs. ESDF exhibited higher AGEs binding capacity, while WSDF demonstrated stronger ability in restraining the AGEs diffusion. These results suggested the potential utility of RTSDF serving as an essential ingredient in functional foods to reduce AGEs accumulation in human body, controlling AGEs-associated diseases.