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Identifying pharmacologically safe lipid-lowering ‘deliverables’ could potentiate therapeutic outcome for diet-induced atherogenesis. Accordingly, we investigated the potential of molluscan ( Katelysia opima ) glycosaminoglycan (GAG) in modulating the early lipid changes in atherogenesis. Wistar rats were fed a diet with (n=24) or without (n=6) hypercholesterolemic atherogenic CCT (rat chow supplemented with 4% cholesterol, 1% cholic acid, and 0.5% thiouracil) for 17 days. CCT-fed rates were (i) treated with isolated molluscan GAG (40 mg/kg/day,  s.c. ) for 10 days after the introduction of CCT diet, (ii) cotreated with GAG (40 mg/kg/day,  s.c. ) for 17 days, or (iii) treated with heparin (200 units/kg/day,  s.c. ) for 10 days after the introduction of CCT. The increases induced by CCT diet in the plasma levels of cholesterol, triglycerides, high-density lipoprotein, very-low-density lipoprotein, and low-density lipoprotein were completely attenuated with GAG treatment. Consistently, alterations induced by CCT diet in the levels of plasma lecithin cholesterol acyltransferase and lipoprotein lipase activities were restored to baseline levels with GAG treatment. Coherently, histology revealed a decrease associated with GAG treatment in the CCT-diet-induced foam cells (in aorta), tubular damages (kidney), and lipid accumulations (liver). Together, these results suggest that GAG may exert antiatherogenesis potential by significantly attenuating lipid modulations derived by a high-fat diet. Further, the data imply that the GAG extracts may comprehensively prevent hypercholesterolemia-associated tissue damage and could thus serve as a therapeutic deliverable for hypercholesterolemia.

Lipid-lowering effect of molluscan ( Katelysia opima ) glycosaminoglycan (GAG) in hypercholesterolemic induced rats