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Efficacy of Lapaquistat Acetate and Simvastatin in Subjects With Primary Dyslipidemia.

This study has been completed.
Sponsor:
ClinicalTrials.gov Identifier:
NCT00256178
First Posted: November 21, 2005
Last Update Posted: May 24, 2012
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
Information provided by (Responsible Party):
Takeda
  Purpose
The purpose of the study is to determine the efficacy of lapaquistat acetate, once daily (QD), taken with simvastatin on cholesterol levels in subjects with primary dyslipidemia

Condition Intervention Phase
Hypercholesterolemia Drug: Lapaquistat acetate and simvastatin Drug: Simvastatin Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Placebo-controlled, Double-blind, Randomized Study to Evaluate the Efficacy and Safety of TAK-475 50 mg and 100 mg Versus Placebo, When Co-administered With Simvastatin 20 mg or 40 mg in Subjects With Primary Dyslipidemia.

Resource links provided by NLM:


Further study details as provided by Takeda:

Primary Outcome Measures:
  • Change from Baseline in fasting plasma Low Density Lipoprotein cholesterol [ Time Frame: Week 24 or Final Visit ]

Secondary Outcome Measures:
  • Change from Baseline in Triglycerides [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in Total Cholesterol [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in High Density Lipoprotein cholesterol [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in Very Low Density Lipoprotein cholesterol [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in apolipoprotein A1 [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in apolipoprotein B [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in non- High Density Lipoprotein cholesterol [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in the ratio of Low Density Lipoprotein cholesterol/High Density Lipoprotein cholesterol [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in the ratio of Total Cholesterol/High Density Lipoprotein cholesterol [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in the ratio of apolipoprotein A1/apolipoprotein B [ Time Frame: Week 24 or Final Visit ]
  • Change from Baseline in high-sensitivity C-reactive protein [ Time Frame: Week 24 or Final Visit ]
  • Percentage of subjects who achieve Low Density Lipoprotein cholesterol concentrations less than 1.81 mmol/L (70 mg/dL) [ Time Frame: Week 24 or Final Visit ]
  • Percentage of subjects who achieve Low Density Lipoprotein cholesterol concentrations less than 2.59 mmol/L (100 mg/dL) [ Time Frame: Week 24 or Final Visit ]
  • Percentage of subjects who achieve Low Density Lipoprotein cholesterol concentrations less than 3.37 mmol/L (130 mg/dL) [ Time Frame: Week 24 or Final Visit ]
  • Best corrected visual acuity [ Time Frame: Week 24 or Final Visit ]
  • Adverse Events [ Time Frame: Weeks 2, 4, 8, 12, 16, 20, and 24 or Final Visit ]
  • Clinical Laboratory Tests [ Time Frame: Weeks 2, 4, 8, 12, 16, 20, and 24 or Final Visit ]
  • Vital Signs [ Time Frame: Weeks 2, 4, 8, 12, 16, 20, and 24 or Final Visit ]
  • 12-lead Electrocardiogram [ Time Frame: Timeframe: Weeks 12 and 24 or Final Visit ]
  • Physical Examination [ Time Frame: Week 24 or Final Visit ]

Enrollment: 411
Study Start Date: October 2005
Study Completion Date: March 2007
Primary Completion Date: March 2007 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Lapaquistat Acetate 50 mg QD + Simvastatin Drug: Lapaquistat acetate and simvastatin
Lapaquistat acetate 50 mg, tablets, orally, once daily and stable simvastatin therapy for up to 24 weeks.
Other Names:
  • Lapaquistat
  • Zocor
  • TAK-475
Experimental: Lapaquistat Acetate 100 mg QD + Simvastatin Drug: Lapaquistat acetate and simvastatin
Lapaquistat acetate 100 mg, tablets, orally, once daily and stable simvastatin therapy for up to 24 weeks.
Other Names:
  • Lapaquistat
  • Zocor
  • TAK-475
Active Comparator: Simvastatin Drug: Simvastatin
Lapaquistat acetate placebo-matching tablets, orally, once daily and stable simvastatin therapy for up to 24 weeks.
Other Name: Zocor

Detailed Description:

In humans, cholesterol is acquired from dietary sources and is produced de novo in the liver, intestine, and various other tissues. Normally, the balance among cholesterol synthesis, dietary intake, and degradation is adequate to maintain healthy cholesterol plasma levels; however, in subjects with hypercholesterolemia, elevation in low-density lipoprotein cholesterol leads to atherosclerotic deposition of cholesterol in the arterial walls (atherosclerosis) and subsequent coronary heart disease. Thus, it has been established that lowering the low-density lipoprotein cholesterol plasma concentrations effectively reduces cardiovascular morbidity and mortality. Additional lipid risk factors for coronary heart disease include elevated triglyceride, very low-density lipoprotein cholesterol and low-density lipoprotein cholesterol levels, and low levels of high-density lipoprotein cholesterol.

Despite changes in lifestyle and the availability of potent lipid-lowering agents, cardiovascular disease continues to be the major cause of death in Western Europe and North America. Serum cholesterol levels exceeding 5 mmol/L (193 mg/dL) are common in adults in Britain and much of Europe, the United States, Australia, and New Zealand, representing a serious public health concern.

Currently, 3-hydroxy-3-methylglutaryl coenzyme A reductase inhibitors (ie, statins) are the first-line monotherapies prescribed for the treatment of dyslipidemia, after diet and therapeutic lifestyle changes alone fail to reduce low-density lipoprotein cholesterol to desired levels. Statins reduce low-density lipoprotein cholesterol and triglycerides, increase high-density lipoprotein cholesterol, and improve endothelial function. Treatment with statins reduces the risk of a vascular event by about 30% in subjects with and without symptoms of arteriosclerosis; however, many subjects fail to reach recommended levels of low-density lipoprotein cholesterol reduction after receiving low-dose statins as a monotherapy. Consequently, the dosage of statins is often increased or an additional treatment is added; the latter has become an important therapeutic option for achieving increasingly stringent lipid targets set forth by international therapeutic guidelines.

Simvastatin, a long-established treatment for dyslipidemia as monotherapy or in combination with other drugs, is a lactone that, once hydrolyzed, inhibits 3-hydroxy-3-methylglutaryl coenzyme A reductase. At the molecular level, the rate of synthesis of cholesterol depends primarily on the highly regulated activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase.

TAK-475 (lapaquistat acetate) is a squalene synthase inhibitor currently under development at Takeda for the treatment of dyslipidemia. This study will evaluate the efficacy and safety of lapaquistat acetate taken with simvastatin in subjects with hypercholesterolemia. Total participation time in this study is expected to be up to 24 weeks.

  Eligibility

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Females of childbearing potential who are sexually active must agree to use adequate contraception from screening throughout the duration of the study and for 30 days following the last dose.
  • Has a documented history of dyslipidemia with or without cardiovascular risk factors but without type 1 or 2 diabetes.
  • Is on a stable dose of simvastatin, either 20 or 40 mg, for at least 4 weeks prior to Screening.
  • Prior to Randomization, the participant has a mean low density lipoprotein cholesterol level greater than or equal to 100 mg/dL and less than or equal to 190 mg/dL for 2 consecutive samples.
  • Prior to Randomization, the subject has mean triglyceride level greater than or equal to 400 mg/dL for 2 consecutive samples.
  • Is willing and able to comply with the recommended, standardized diet.

Exclusion Criteria:

  • Has annine aminotransferase or aspartate aminotransferase level greater than 1.5 times the upper limit of normal, identified during screening.
  • Has a serum creatinine greater than 133 mmol/L, identified during screening.
  • Has a creatine kinase greater than 3 times the upper limit of normal, identified during screening.
  • Has active liver disease or jaundice.
  • Has taken any bile acid sequestrants [eg, cholestyramine], and intestinal cholesterol uptake inhibitors [eg, ezetimibe]) from 30 days before Screening until study completion or any fibrates for 6 weeks before Visit 1.
  • Has a previous history of cancer that has been in remission for less than 5 years prior to the first dose of study medication.
  • Has an endocrine disorder, such as Cushing's syndrome, hyperthyroidism, or inappropriately treated hypothyroidism affecting lipid metabolism.
  • Has a history of myocardial infarction, angina pectoris, unstable angina, transient ischemic attacks, cerebrovascular accident, peripheral vascular disease, abdominal aortic aneurysm, coronary angioplasty, coronary or peripheral arterial surgery, or multiple risk factors that confer a 10-year risk for cardiovascular heart disease greater than 20% based on Framingham risk scoring.
  • Has a positive hepatitis B surface antigen or hepatitis C virus antibody test, as determined by medical history.
  • Has a positive human immunodeficiency virus status or is taking antiretroviral medications, as determined by medical history and/or subject's verbal report.
  • Has received any investigational medication 30 days prior to screening, (for drugs with a long half-life, within a period of less than 5 times the drug's half-life) or is participating in an investigational study.
  • Has received lapaquistat acetate in a previous clinical study or as a therapeutic agent.
  • Has a history or presence of clinically significant food allergy that would prevent adherence to the specialized diet.
  • Has a known heterozygous or homozygous familial hypercholesterolemia or known type III hyperlipoproteinemia (familial dysbetalipoproteinemia).
  • Has fibromyalgia, myopathy, rhabdomyolysis, or unexplained muscle pain.
  • Has uncontrolled hypertension
  • Has had inflammatory bowel disease or any other malabsorption syndrome, or has had gastric bypass or any other surgical procedure for weight loss.
  • Has a history of drug abuse or a history of high alcohol intake within the previous 2 years.
  • Has type 1 or 2 diabetes mellitus.
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00256178


  Show 53 Study Locations
Sponsors and Collaborators
Takeda
Investigators
Study Director: Medical Director Takeda
  More Information

Publications:
Responsible Party: Takeda
ClinicalTrials.gov Identifier: NCT00256178     History of Changes
Other Study ID Numbers: TAK-475/EC302
2005-002313-21 ( EudraCT Number )
U1111-1122-8212 ( Registry Identifier: WHO )
First Submitted: November 16, 2005
First Posted: November 21, 2005
Last Update Posted: May 24, 2012
Last Verified: May 2012

Keywords provided by Takeda:
Hyperlipidemia
Drug Therapy

Additional relevant MeSH terms:
Hypercholesterolemia
Dyslipidemias
Hyperlipidemias
Lipid Metabolism Disorders
Metabolic Diseases
Simvastatin
Anticholesteremic Agents
Hypolipidemic Agents
Antimetabolites
Molecular Mechanisms of Pharmacological Action
Lipid Regulating Agents
Hydroxymethylglutaryl-CoA Reductase Inhibitors
Enzyme Inhibitors