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Study of 3,5-Diiodothyropropionic Acid (DITPA) in Hypercholesterolemic Patients

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. Identifier: NCT00311987
Recruitment Status : Terminated (Curtailment of funding by sponsor)
First Posted : April 7, 2006
Last Update Posted : April 2, 2013
Information provided by:
Johns Hopkins University

Brief Summary:

The natural thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are known to have a cholesterol-lowering effect. Their pharmacologic use for this purpose is limited, however, by their actions on other organs, including the heart, bone, and brain, where there can be side effects of excessive thyroid hormone action. 3,5-diiodothyropropionic acid (DITPA) is a thyroid hormone analog with relative selectivity for a form of the thyroid hormone receptor expressed in the liver, where it regulates several aspects of lipid metabolism, including the clearance of low-density lipoprotein (LDL) cholesterol.

This study is designed to determine whether DITPA is safe and effective in achieving LDL cholesterol levels that are consistent with the National Cholesterol Education Program Adult Treatment Panel III (NCEP ATP III) guidelines in patients who have not achieved those levels on conventional therapy, due to drug-resistant disease, drug intolerance, or both.

This is a single-center, randomized, double-blind, placebo-controlled study. Following a 4-week Pre-Randomization Phase with dietary counseling and a 2-week placebo run-in, eligible patients will be randomized (1:1:1) to receive DITPA (90 mg/day, 180 mg/day), or placebo for a total treatment duration of 12 weeks.

Sixty (60) patients will be randomized to 1 of 3 treatment groups in a 1:1:1 ratio (i.e., 20 patients per treatment group):

  • DITPA at 90 mg/day (45 mg twice a day [BID] taken orally)
  • DITPA at 180 mg/day (90 mg BID taken orally)
  • Placebo (BID taken orally)

Those patients randomized to receive DITPA at 90 mg/day will receive 45 mg/day for the first 2 weeks, followed by 90 mg/day for 10 weeks.

Those patients randomized to receive DITPA at 180 mg/day will receive 45 mg/day for the first 2 weeks, followed by 90 mg/day for the next 2 weeks, and then 180 mg/day for 8 weeks.

Condition or disease Intervention/treatment Phase
Hypercholesterolemia Drug: 3,5-Diiodothyropropionic acid (DITPA) therapy Phase 1 Phase 2

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double
Primary Purpose: Treatment
Official Title: A Randomized, Double-Blind Placebo-Controlled Study of 3,5-diiodothyropropionic Acid (DITPA) in Combination With Standard Therapy to Attain NCEP ATP III Goal for LDL Cholesterol in Hypercholesterolemic Patients
Study Start Date : April 2006
Actual Study Completion Date : April 2007

Resource links provided by the National Library of Medicine

Primary Outcome Measures :
  1. To evaluate DITPA as a lipid modifying agent in combination with standard therapy in patients with LDL cholesterol (LDL-C) levels greater than the NCEP ATP III goals, as determined by patient's risk category, in order to achieve NCEP III LDL-C goals

Secondary Outcome Measures :
  1. To evaluate the effect of DITPA on other lipid targets: triglyceride
  2. total cholesterol
  3. ratio of total cholesterol to high-density lipoprotein (HDL)
  4. ratio of LDL to HDL
  5. HDL cholesterol
  6. lipoprotein a [Lp (a)]
  7. apolipoprotein A-I
  8. apolipoprotein B100
  9. and LDL subfractions
  10. To evaluate the effect of DITPA on weight and waist circumference
  11. To evaluate the effect of DITPA on high sensitivity C-reactive protein (hs CRP)
  12. To evaluate the safety of DITPA in this patient population

Information from the National Library of Medicine

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

Inclusion Criteria:

Patients are eligible for study entry based on the following criteria:

  1. Males or females greater than or equal to 18 years of age
  2. Females must not be pregnant or lactating. Females of childbearing potential and males must use a reliable means of contraception.
  3. LDL-C level greater than the NCEP goals, as determined by patients' risk category according to NCEP ATP III criteria
  4. Risk category for coronary heart disease and coronary heart disease equivalent with LDL goal of < 100 mg/dL
  5. Baseline lipid criteria: LDL-C = 100 to160 mg/dL and triglyceride level = 100 to 500 mg/dL
  6. Normal thyroid function tests (total T3, total T4, and thyroid-stimulating hormone [TSH])
  7. Hemoglobin A1C < 8.5% on a stable oral hypoglycemic or insulin regimen
  8. On stable lipid modification pharmacotherapy (including a statin) for at least 2 weeks prior to study entry. Patients must be on at least half of the maximal doses of statins (as assessed by the Investigator), or be intolerant to statins such that the doses are not achievable.
  9. Able to give informed consent

Exclusion Criteria:

Pre-Randomization Exclusion Criteria

Patients will not be eligible for the study based on the following criteria:

  1. History of thyroid disorders of any form within 24 weeks prior to study entry
  2. Active liver disease and/or liver transaminases greater than 1.5 X upper limit of normal
  3. Active myocarditis, hypertrophic cardiomyopathy, uncorrected primary valvular disease, restrictive cardiomyopathy, uncorrected congenital heart disease, or constrictive pericarditis
  4. Myocardial infarction, unstable ischemic heart disease, stroke, or coronary revascularization procedure within 24 weeks prior to study entry
  5. Moderate or severe symptomatic congestive heart failure (New York Heart Association class III and IV)
  6. Drug or alcohol dependence, or other conditions which may affect study compliance
  7. Renal insufficiency (serum creatinine > 2 mg/dL)
  8. Subjects taking other hormonal therapies (other than oral contraceptive agents and postmenopausal hormone replacement therapy) e.g., glucocorticoids, androgens, or growth hormones
  9. Use of thyroid supplements (levothyroxine, liothyronine, etc.) or any preparation containing thyromimetic agents within 24 weeks prior to study entry
  10. History of coagulopathy or use of anticoagulants such as warfarin
  11. Unstable endocrine/metabolic syndrome that may affect lipid metabolism
  12. History of atrial or ventricular arrhythmia
  13. Diagnosis of other non-cardiac underlying medical conditions expected to impact mortality within 24 weeks after randomization

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 identifier (NCT number): NCT00311987

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United States, Maryland
Johns Hopkins Bayview Medical Center
Baltimore, Maryland, United States, 21224
Sponsors and Collaborators
Johns Hopkins University
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Principal Investigator: Annabelle Rodriguez, MD Johns Hopkins University
Layout table for additonal information Identifier: NCT00311987    
Other Study ID Numbers: NA_00001376
First Posted: April 7, 2006    Key Record Dates
Last Update Posted: April 2, 2013
Last Verified: April 2006
Keywords provided by Johns Hopkins University:
Thyroid hormone
Diiodothyropropionic acid
Additional relevant MeSH terms:
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Lipid Metabolism Disorders
Metabolic Diseases
3,5-diiodothyropropionic acid
Hormones, Hormone Substitutes, and Hormone Antagonists
Physiological Effects of Drugs