A First in Human Study of STT-5058, an Antibody That Binds ApoC3

A Double-blind, Randomised, Placebo-controlled, Study to Evaluate the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Single and Multiple-ascending Doses of Intravenously Administered STT-5058 in Otherwise Healthy Subjects With Elevated Triglyceride Levels and Single-ascending and Multiple Doses of Subcutaneously Administered STT-5058 in Otherwise Healthy Subjects With Elevated Triglyceride Levels and Patient Volunteers With Hypertriglyceridemia.

A First in Human Study of STT-5058, an Antibody That Binds ApoC3, investigating single and multiple ascending intravenous doses and ascending subcutaneous doses of STT-5058 in otherwise healthy volunteers with elevated triglyceride levels

The study is in five parts. Part A is up to 6 single ascending intravenous dose cohorts of STT-5058 in otherwise healthy volunteers with TRGs >150mg/dL. Part B is up to 4 multiple ascending intravenous dose cohorts of STT-5058 in otherwise healthy volunteers with TRGs >150mg/dL who will receive 3 doses at 2 week intervals. Part C will recruit a single cohort of patient volunteers with TRG >200mg/dL who will receive 3 doses at 2 week intervals of STT-5058. Part D will investigate up to 2 single ascending doses of subcutaneous STT-5058. Part E will recruit a single cohort of otherwise healthy volunteers with TRG > 150mg/dL to receive 4 doses subcutaneously of STT-5058 over 4 weeks

Inclusion Criteria:

• in good health
• Able to comprehend and willing to sign an ICF and to abide by the study restrictions.
• Females will not be pregnant or lactating, and females of childbearing potential and males will agree to use contraception Parts A, B and D
• BMI between 18 and 35 kg/m2 inclusive
• Fasting Triglycerides between 150 and 400mg/dL inclusive Part C
• Fasting Triglycerides between 200 and 400 mg/dL inclusive
• Fasting LDL-C between 70 and 160 mg/dL inclusive
• BMI between 18 and 40 kg/m2

Exclusion Criteria:

• significant history or clinical manifestation of metabolic, allergic, dermatological, hepatic, renal, haematological, pulmonary, cardiovascular, gastrointestinal, neurological, respiratory, endocrine, or psychiatric disorder, as determined by the Investigator
• Confirmed (eg, 2 consecutive measurements) systolic blood pressure >150 or <90 mmHg, diastolic blood pressure >90 or <50 mmHg, and heart rate >90 or <40 beats per minute at Screening, Check-in, or prior to dosing on Day 1.
• History of alcoholism or drug/chemical abuse within 2 years prior to Check-in.
• Participation in a clinical study involving administration of an investigational drug (new chemical entity) in the past 90 days or 5 half-lives (if known), whichever is longer, prior to dosing.