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  • Title: Inhibition of cholesterol absorption with CP-148,623 lowers serum cholesterol in humans.
    Author: Harris WS, Windsor SL, Newton FA, Gelfand RA.
    Journal: Clin Pharmacol Ther; 1997 Mar; 61(3):385-9. PubMed ID: 9084463.
    Abstract:
    OBJECTIVE: To determine the effects of the reduction of intestinal cholesterol absorption with CP-148,623 on serum cholesterol levels in men with mild hyperlipidemia. METHODS: In an outpatient study in a university medical center, healthy male volunteers (n = 25) with borderline-high serum cholesterol levels participated in a double-blind, placebo-controlled parallel-group study. A 3-week dietary run-in period was followed by 2 weeks of treatment with either CP-148,623 (300 mg twice a day; n = 12) or placebo (n = 13). RESULTS: Fractional cholesterol absorption (by the dual-isotope, continuous-feeding technique), fecal neutral sterol excretion, and serum lipids were measured after the diet run-in and after the treatment periods. CP-148,623 caused a marked inhibition (by 38%) of fractional cholesterol absorption (50% +/- 2% [baseline] to 31% +/- 1%) and a 71% increase in fecal neutral sterol excretion (481 +/- 39 mg/day [baseline] to 804 +/- 55 mg/day), compared with negligible changes in the placebo group (p < 0.0001 for both). Mean percent reductions from baseline in serum low-density lipoprotein (LDL) cholesterol levels were 11.6% with CP-148,623 (119 +/- 17 mg/dl to 104 +/- 13 mg/dl) versus a nonsignificant 1.8% reduction with placebo (change with CP-148,623 versus placebo, p < 0.0002). CONCLUSIONS: In healthy male volunteers with mild hypercholesterolemia, treatment for 2 weeks with 600 mg/day CP-148,623 inhibited fractional cholesterol absorption by 35% to 40%, increased fecal neutral sterol excretion by 60% to 70%, and reduced serum LDL cholesterol by 10% to 12%.
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