FAMILIAL HYPERCHOLESTEROLEMIA

Familial Hypercholesterolemia (FH) is an autosomal dominate disease which occurs about 1 in every 500 people (also known as Heterozygous Familial Hypercholesterolemia (HeFH). The homozygous form (HoFH) is rarer, occurring with the frequency of about 1 in a million. The statistics for the homozygous form is not surprising though; since patients suffering from two alleles of this gene usually do not survive pass their teens. The condition of hypercholesterolemia in FH patients is detectable at birth or shortly thereafter. The cholesterol levels in heterozygous patients are between 350 to 500 mg/dL, and in homozygous, the levels are between 700 to 1,200 mg/dL.

SLx-4090 was designed to act selectively on MTP in gut enterocytes while avoiding systemic exposure and the resultant liver toxicity that has prevented development of other compounds of this class. A first time in man (FTIM) study was initiated in March 2006 and dosing was completed in June 2006. A repeat dose study (RDS) and a Phase IIa study in patients with familial hypercholesterolemia study is expected to start in Q3 2006.