Effect of Content of Sulfate Groups in Seaweed Polysaccharides on Antioxidant Activity and Repair Effect of Subcellular Organelles in Injured HK-2 Cells

Table 1

Molecular weight and content of −OSO₃H and −COOH groups of four DSPs as well as comparison of the scavenging capacity of ·OH and DPPH radicals.

Polysaccharide type	Mean molecular; weight M/Da	−OSO3H content/%	−COOH content/%	·OH radical scavenging; capacity IC50/mg/mL	DPPH radical scavenging; capacity IC50/mg/mL
DPY-1	4020	17.9	1.7	2.75	1.82
DGL-2	3343	13.3	1.0	7.21	8.24
DSF-3	3828	8.2	1.3	8.33	9.68
DUP-4	3635	5.5	1.2	9.21	14.6
Vc control	—	—	—	1.57	0.91

DPY-1: degraded Porphyra yezoensis polysaccharide; DGL-2: degraded Gracilaria lemaneiformis polysaccharide; DSF-3: degraded Sargassum fusiform polysaccharide; DUP-4: degraded Undaria pinnatifida polysaccharide; Vc: ascorbic acid.