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  • Title: Treatment of severe familial hypercholesterolemia in childhood with sitosterol and sitostanol.
    Author: Becker M, Staab D, Von Bergmann K.
    Journal: J Pediatr; 1993 Feb; 122(2):292-6. PubMed ID: 8429449.
    Abstract:
    This study was undertaken to compare the ability of two plant sterols to reduce serum levels of lipids and to compare their mechanism of action in nine children with severe familial hypercholesterolemia (total and low-density lipoprotein cholesterol concentrations averaged 9.57 mmol/L (370 mg/dl) and 7.87 mmol/L (301 mg/dl)). After a 3-month strict diet, the children were given sitosterol pastils (2 gm three times a day) for 3 months, followed by a 7-month course of sitostanol (0.5 gm three times a day). Serum lipoprotein levels and serum concentrations of campesterol and sitosterol were determined in all nine children, and the fecal excretion of neutral and acidic sterols were determined in seven children at the end of each therapeutic regimen. Sitosterol reduced low-density lipoprotein cholesterol levels by 20% (p < 0.01); sitostanol reduced low-density lipoprotein cholesterol levels by 33% after 3 months and 29% after 7 months (p < 0.01 compared with diet; p < 0.05 compared with sitosterol). Although sitosterol did not alter serum concentrations of campesterol and sitosterol, a significant reduction did occur during sitostanol therapy (-47% and -51%, respectively; p < 0.01). Fecal excretion of neutral sterols increased from 6.7 mg/kg per day during the control period to 9.7 mg/kg per day during sitosterol administration (p < 0.05), and to 12.6 mg/kg per day during sitostanol administration (p < 0.05 compared with diet and sitosterol periods), indicating an increase in the inhibition of intestinal cholesterol absorption. All children completed the study and no obvious side effects occurred. The data indicate that sitostanol, even with a dose four-fold lower than that of sitosterol, was significantly more effective in reducing elevated levels of low-density lipoprotein cholesterol, and the reduction in serum lipid levels was of the same magnitude as that observed with systemic lipid-lowering drugs. These results suggest that sitostanol, a nonabsorbable plant sterol, could be the drug of choice for treating familial hypercholesterolemia in childhood.
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