Trial to Assess Chelation Therapy 2 (TACT2)

March 24, 2025 updated by: Gervasio Lamas, MD, Mt. Sinai Medical Center, Miami
Trial to Assess Chelation Therapy 2 (TACT2) is a randomized, double blind controlled factorial clinical trial of edetate disodium-based chelation and high-dose oral vitamins and minerals to prevent recurrent cardiac events in diabetic patients with a prior myocardial infarction (MI).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The primary objective of TACT2, therefore, is to determine if the chelation-based strategy increases the time to the first occurrence of any of the components of the TACT2 primary endpoint: all-cause mortality, myocardial infarction, stroke, coronary revascularization, or hospitalization for unstable angina compared to the placebo chelation strategy.

TACT2 is a 2x2 factorial trial testing 40-weekly edetate disodium-based chelation infusions and twice daily high-dose oral multivitamins and multiminerals (OMVM) in a placebo-controlled design.

TACT2 is being carried out to replicate the findings of TACT1, which found a striking reduction of recurrent cardiovascular events in post-MI diabetic patients receiving edetate disodium-based chelation therapy.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
1000

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Florida
      • Miami Beach, Florida, United States, 33132
        • Mount Sinai Medical Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

50 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Age: ≥ 50 years
  2. History of diabetes, defined as medical record evidence or patient report of currently using insulin or oral hypoglycemic agents, or with a history of fasting blood glucose measurement of 126 mg/dL or higher, or a history of HbA1c of 6.5% or higher.

  3. History of myocardial infarction based on the Universal Definition of MI.

    1. When information about the MI hospitalization is available, all MI types except Type 2 qualify for study entry.
    2. When information about the MI hospitalization is not available, a wall motion abnormality on imaging or a perfusion defect on scan that corresponds to a coronary distribution, whether or not accompanied by pathological Q waves in the appropriate distribution, will qualify the patient for study entry. This criterion requires a call to the CCC for case review.

Exclusion Criteria:

  1. Baseline serum creatinine >2.0 mg/dL.
  2. HbA1C >11%.
  3. Myocardial infarction within 6 weeks of randomization.
  4. History of allergic reactions to EDTA or any other components of the chelation solution, including heparin. Site personnel are to call the CCC to discuss heparin allergy.
  5. Coronary or peripheral arterial revascularization procedure performed within the last 6 months.
  6. Planned revascularization procedure in the 6 months following enrollment.
  7. Heart failure hospitalization within 6 months prior to enrollment or in clinical heart failure at the time of proposed enrollment (such as NYHA Class 3 dyspnea + rales >basilar, and additional signs of fluid overload). Such patients may be treated with diuretics and enrolled when stable.
  8. Poor or no venous access in the upper extremities.

  9. a. Prior intravenous chelation therapy consisting of > 1 infusion within 5 years; if only 1 infusion took place, patient cannot be enrolled for at least 12 months after said infusion.

    b. Oral chelation therapy with an approved oral chelating agent within 2 years.

  10. Prior participation in TACT.
  11. Baseline platelet count <100,000.
  12. History of cigarette smoking within the last 3 months.
  13. ALT or AST > 2.0 times the upper limit of normal.
  14. Wilson's disease, hemochromatosis, or parathyroid disease.
  15. Any medical condition including a current diagnosis of cancer (except non-melanoma skin cancer) that will limit patient survival over the duration of the trial.
  16. Any factor that suggests that the potential participant will not be able to adhere to the protocol.
  17. Women of child-bearing potential including those with plans for post-menopausal in vitro fertilization or other reproductive technology.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Factorial Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Active/Active
Active disodium EDTA (chelation) + Active Oral Multi Vitamins/Minerals (OMVM)
Drug: disodium EDTA
IV Disodium Ethylene diamine tetra acetic acid in 500 cc
Other Names:
  • EDTA
Dietary supplement: Oral Multi Vitamins/Minerals (OMVM)
6 tablets of Multi-vitamin/Multimineral daily
Active Comparator: Active/Placebo
Active disodium EDTA (chelation) + Placebo Oral Multi Vitamins/Minerals (OMVM)
Drug: disodium EDTA
IV Disodium Ethylene diamine tetra acetic acid in 500 cc
Other Names:
  • EDTA
Active Comparator: Placebo/ Active
Placebo disodium EDTA (chelation) + Active Oral Multi Vitamins/Minerals (OMVM)
Dietary supplement: Oral Multi Vitamins/Minerals (OMVM)
6 tablets of Multi-vitamin/Multimineral daily
Drug: Placebo disodium EDTA
IV Placebo comparator- 500 normal saline
Placebo Comparator: Placebo/Placebo
Placebo disodium EDTA (chelation) + Placebo Oral Multi Vitamins/Minerals (OMVM)
Drug: Placebo disodium EDTA
IV Placebo comparator- 500 normal saline
Dietary supplement: Placebo Oral Multi Vitamins/Minerals (OMVM)
6 tablets of a placebo Multi-vitamin/Multimineral daily

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Primary Composite Outcome
Time Frame: 48 month follow-up (median)
Time to first event: myocardial infarction, stroke, hospitalization for unstable angina, coronary revascularization, or death from any cause
48 month follow-up (median)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Secondary Composite Outcome
Time Frame: 48 month follow-up (median)
Time to first event: myocardial infarction, stroke, or death from cardiovascular causes
48 month follow-up (median)
Secondary Outcome
Time Frame: All-Cause Mortality was assessed through study completion, up to 48 months (median)
Time to All-Cause mortality
All-Cause Mortality was assessed through study completion, up to 48 months (median)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Mt. Sinai Medical Center, Miami

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
National Heart, Lung, and Blood Institute (NHLBI)
National Center for Complementary and Integrative Health (NCCIH)
Duke Clinical Research Institute

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: Gervasio A Lamas, MD, Mount Sinai Medical Center of Florida
  • Principal Investigator: Kevin J Anstrom, PhD, University of North Carolina, Chapel Hill
  • Principal Investigator: Daniel B Mark, MD, Duke University (Duke Clinical Research Institute)

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 1, 2016

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 30, 2023

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
June 30, 2023

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 5, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
April 5, 2016

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
April 11, 2016

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 30, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 24, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • AT009149-01
  • UH3AT009149 (U.S. NIH Grant/Contract)
  • UH3AT009150 (U.S. NIH Grant/Contract)
  • R01AT009273 (U.S. NIH Grant/Contract)
  • U24AT009150 (U.S. NIH Grant/Contract)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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