Drug-induced QT ProlongationPhase 1NCT05716854
Electrophysiological Effects of Potential QT Prolonging Drugs
A Phase 1 study testing Clarithromycin, Pimozide and Moxifloxacin in people with Drug-induced QT Prolongation and Pharmacokinetics, run by Food and Drug Administration (FDA) at 1 site in United States.
Trial summary
Since 2005, FDA has required almost all new drugs be tested for their ability to prolong the QT interval through clinical studies. This requirement stems from the increased TdP risk QT interval prolongation can cause. Read more about this study
- Who is it for?
- Ages 18 to 50 yearsHealthy volunteers can take part
- Conditions the study is for
- Drug-induced QT Prolongation, Pharmacokinetics, Pharmacodynamics
- What is being tested?
- Clarithromycin, Pimozide and Moxifloxacin
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 44 participants
- Where
- 1 siteUnited States
- Study dates
- 21 Mar 2023to 13 Jun 2023
- Phase
- Phase 1
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 50 years
- All sexes
- Healthy volunteers accepted
- Adult
Who may be able to join
- Subject has signed an IRB approved written informed consent and privacy language as per national regulations (e.g., Health Insurance Portability and Accountability Act authorization) before any study related procedures are performed.
- Subject is a healthy non-smoker who weighs at least 50 kg (110 lbs) and has a body mass index of 18.5 to 33.0 kg/m2, inclusive, at Screening.
- Subject has normal medical history findings, clinical laboratory results, vital sign measurements, pulse oximetry, 12-lead ECG results, and physical examination findings at screening or, if abnormal, the abnormality is not considered clinically significant (as determined and documented by the investigator or designee).
- Subject must have a negative test result for alcohol and drugs of abuse at screening and check-in days.
- Subject must test negative for severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) by a rapid antigen test at check-in for all study periods.
- Female subjects must be of non-childbearing potential (confirmed with follicle-stimulating hormone levels > 40 mIU/mL) or, if they are of childbearing potential, they must: 1) have negative serum HCG at screening and check-in 2) have been strictly abstinent for 1 month before check-in (Day -1) and agree to remain strictly abstinent for the duration of the study and for at least 1month after the last application of study drug; OR 3) be practicing 2 highly effective methods of birth control (as determined by the investigator or designee; one of the methods must be a barrier technique) from at least 1 month before check-in (Day -1) until at least 1 month after the end of the study.
- Male subjects must agree to practice 2 highly effective methods of birth control (as determined by the investigator or designee) from at least 1 month before check-in (Day -1) until at least 3 months after the last dose of study drug.
- Subject is highly likely (as determined by the investigator) to comply with the protocol defined procedures and to complete the study.
Who cannot join
- Subject has a 12-lead safety ECG result at Screening or check-in (Day -1) with evidence of any of the following abnormalities:
- QT corrected interval (QTc) using Fridericia correction (QTcF) >430 milliseconds (ms)
- PR interval >220 ms or <120 ms
- QRS duration >110 ms
- Second- or third-degree atrioventricular block
- Complete left or right bundle branch block or incomplete right bundle branch block
Show all 32Show fewer
- Heart rate <50 or >90 beats per minute
- Pathological Q-waves (defined as Q wave >40 ms)
- Ventricular pre-excitation
- Subject has a history of unexplained syncope, structural heart disease, long QT syndrome, heart failure, myocardial infarction, angina, unexplained cardiac arrhythmia, torsade de pointes, ventricular tachycardia, or placement of a pacemaker or implantable defibrillator. Subjects shall also be excluded if there is a family history of long QT syndrome (genetically proven or suggested by sudden death of a close relative due to cardiac causes at a young age) or Brugada syndrome.
- Subject has used any prescription or nonprescription drugs (including aspirin or NSAIDs and excluding oral contraceptives and acetaminophen) within 14 days or 5 half-lives (whichever is longer) or complementary and alternative medicines within 28 days before the first dose of study drug. This includes prescription or nonprescription ophthalmic drugs. Note the only two drugs permitted are oral contraceptives and acetaminophen.
- Subject is currently participating in another clinical study of an investigational drug or has been treated with any investigational drug within 30 days or 5 half-lives (whichever is longer) of dosing for this study.
- Subject has used nicotine-containing products (e.g., cigarettes, cigars, chewing tobacco, snuff, electronic cigarettes) within 6 weeks of Screening. Subjects must refrain from using these throughout the study.
- Subject has consumed alcohol, xanthine-containing products (e.g., tea, coffee, chocolate, cola), caffeine, grapefruit, or grapefruit juice within 24 hrs of check-in. Subjects must refrain from ingesting these throughout the study.
- Subject is unable to tolerate a controlled, quiet study conduct environment, including avoidance of music, television, movies, games, and activities that may cause excitement, emotional tension, or arousal during the prespecified time points (e.g., before and during ECG extraction windows).
- Subject is unwilling to comply with study rules, including the study-specific diet, attempting to void at specified times (e.g., before ECG extraction windows), remaining quiet, awake, undistracted, motionless, and supine during specified times, and avoiding vigorous exercise as directed.
- Subject has a history of consuming more than 14 units of alcoholic beverages per week within 6 months before Screening, has a history of alcoholism or drug/chemical/substance abuse within 2 years before Screening (Note: 1 unit = 12 ounces of beer, 4 ounces of wine, or 1 ounce of spirits/hard liquor), or has a positive test result for alcohol or drugs of abuse (amphetamines, barbiturates, benzodiazepines, cannabinoids, cocaine, and opiates) at Screening or Check-in of each period.
- Subject has a history or evidence of a clinically significant disorder, condition, or disease (e.g., cancer, human immunodeficiency virus [HIV], hepatic or renal impairment) that, in the opinion of the investigator, would pose a risk to subject safety or interfere with the study evaluation, procedures, or completion. This includes subjects with any underlying medical conditions that the Investigator believes would put subjects at increased risk of severe illness from COVID-19 based on the Centers for Disease Control and Prevention (CDC) guidelines. The CDC lists cancer, chronic kidney disease, chronic obstructive pulmonary disease, immunocompromised state from solid organ transplant, severe obesity, serious heart conditions, sickle cell disease, pregnancy, smoking and type 2 diabetes mellitus as conditions that put subjects at increased risk. Additionally, the CDC lists asthma (moderate-to-severe), cerebrovascular disease, cystic fibrosis, hypertension, immunocompromised state or immune deficiencies, neurologic conditions such as dementia, liver disease, pulmonary fibrosis, thalassemia, BMI > 25.0, and type 1 diabetes mellitus as conditions that might put subjects at increased risk.
- Subject has any signs or symptoms that are consistent with COVID-19 per CDC recommendations. These include subjects with fever or chills, cough, shortness of breath or difficulty breathing, fatigue, muscle or body aches, headache, new loss of taste or smell, sore throat, congestion or runny nose, nausea or vomiting, or diarrhea may have COVID-19. In addition, the subject has any other findings suggestive of COVID-19 risk in the opinion of the investigator.
- Subject has known or suspected allergies or sensitivities to the study drug.
- Subject has a history of thoracic surgery.
- Subject has any condition possibly affecting study drug absorption (e.g., gastrectomy, Crohn's disease, irritable bowel syndrome).
- Subject has a skin condition likely to compromise ECG electrode placement.
- Any individual with breast implants.
- Subject has clinical laboratory test results (hematology, serum chemistry and urinalysis) at Screening or Check-In that are outside the reference ranges provided by the clinical laboratory and considered clinically significant by the investigator. Tests may be repeated once for confirmation.
- Subject has a positive test result at Screening for HIV 1 or 2 antibody, hepatitis C virus antibodies, or hepatitis B surface antigen.
- Subject has a mean systolic blood pressure <90 or >140 mmHg or a mean diastolic blood pressure <50 or >90 mmHg at either Screening or Check-in of Period 1.
- Subject is unable or unwilling to undergo multiple venipunctures for blood sample collection because of poor tolerability or is unlikely to complete the study due to poor venous access.
- Female subject is currently pregnant or lactating or was within 3 months of the study.
- Subject has had any significant blood loss, donated 1 unit (450 mL) of blood or more, or received a transfusion of any blood or blood products within 60 days, or donated plasma within 7 days before Check-in of Period 1.
- Subject has any other condition that precludes his or her participation in the study (as determined by the investigator).
- Subject undergoes genetic testing for CYP2D6 phenotype and is a "poor metabolizer" (only for Part 1).
Trial locations and contacts
1 site in 1 country.
United States1 site
Spaulding Clinical Research
West Bend, Wisconsin, 53095
About this study
Official title: Clinical ECG Study to Evaluate Electrophysiological Effects of Potential QT Prolonging Drugs With Novel ECG Biomarkers With Exposure-Response Analysis
Since 2005, FDA has required almost all new drugs be tested for their ability to prolong the QT interval through clinical studies. This requirement stems from the increased TdP risk QT interval prolongation can cause. However, the QT interval is an imperfect biomarker, as there are multiple drugs that can prolong the QT interval, without causing increased TdP occurrence. As such, numerous drugs labeled as causing QT prolongation, may in fact have no impact on TdP occurrence.
To address this problem, FDA, in collaboration with multiple external partners, has led an initiative to combine novel preclinical in vitro experiments within silico modeling and simulation followed by pharmacodynamic electrocardiographic (ECG) biomarkers. The goal is to use these novel computational and analytical tools to better predict TdP risk (beyond just the QT interval) by focusing on understanding the underlying mechanisms and applying an integrated biological systems approach.
This clinical study consists of 2 parts: a 3-arm, 22-subject crossover study (Part 1) and a 4-arm, 22-subject crossover study (Part 2). These parts are included in the same protocol and study due to the similarity of the inclusion and exclusion criteria, similar procedures, and similar primary goals.
Read the detailed description
The risk of drug-induced Torsades de Pointes (TdP), a potentially fatal ventricular arrhythmia, has resulted in multiple drugs worldwide being removed from the market, as well as over 150 drugs being listed on CredibleMeds.org for QT prolongation or TdP association. In response, since 2005, FDA has required almost all new drugs be tested for their ability to prolong the QT interval through clinical studies. This requirement stems from the increased TdP risk QT interval prolongation can cause. However, the QT interval is an imperfect biomarker, as there are multiple drugs that can prolong the QT interval, without causing increased TdP occurrence. As such, numerous drugs labeled as causing QT prolongation, may in fact have no impact on TdP occurrence. While this labeling affects physician prescribing, it also has the potential to limit effective therapeutic options for patients.
To address this problem, FDA, in collaboration with multiple external partners, has led an initiative to combine novel preclinical in vitro experiments within silico modeling and simulation followed by pharmacodynamic electrocardiographic (ECG) biomarkers. The goal is to use these novel computational and analytical tools to better predict TdP risk (beyond just the QT interval) by focusing on understanding the underlying mechanisms and applying an integrated biological systems approach.
Recently, the International Council on Harmonization (ICH) released a new Guideline with updated Questions and Answers (Q\&As) to the clinical (ICH E14) and nonclinical (ICH S7B) Guidelines for assessing the QT prolongation and proarrhythmic risk of non-antiarrhythmic drugs. The Q\&A provides more guidance on the use of an integrated nonclinical analysis to support clinical QT assessment. This includes the comparison of the hERG safety margin of the investigational product to the safety margin of predominant hERG (the human Ether-à-go-go-Related Gene) blockers with a characterization of the concentration-QTc relationship based on a limited set of example drugs, i.e., ondansetron, moxifloxacin and dofetilide.
This clinical study consists of 2 parts: a 3-arm, 22-subject crossover study (Part 1) and a 4-arm, 22-subject crossover study (Part 2). These parts are included in the same protocol and study due to the similarity of the inclusion and exclusion criteria, similar procedures, and similar primary goals.
Part 1: Intermediate risk predominant hERG blocking drugs The FDA performed a literature review and identified 28 proarrhythmic drugs from available in vitro studies of cardiac ion channel IC50 (using HEK293 cells and the hERG 1a subunit). Two of these drugs, classified as intermediate risk "predominant hERG blocking" (pimozide and clarithromycin), have been identified as candidates for evaluation in Part 1. An aim of this study will be generating higher quality QT data on "intermediate risk" "predominant hERG" blocking drugs' effect on both electrocardiographic biomarkers, QTc and J-Tpeakc interval prolongation, at therapeutic and supratherapeutic exposures. These data will also be used to support assessment of the hERG safety margin threshold together with moxifloxacin, dofetilide, and ondansetron as described in the recently released ICH Q\&A's.
Part 2: Combination of hERG and multi-ion channel block Part 2 of this study will assess the effects of a mixed ion channel blocking drug, cobicistat, on the QTc and J-Tpeakc interval alone and in combination with a predominant hERG blocking drug (moxifloxacin). Clinical data with cobicistat, a structural analog of ritonavir used as a pharmacokinetic enhancer in various anti-viral regimens, has demonstrated QTc shortening and PR prolongation with supratherapeutic doses. Whether this is a results of late sodium block, calcium channel block, or other features is unclear. Additional clinical data with cobicistat alone or in combination with moxifloxacin will enhance our understanding of the effects of mixed ion channel blocking on electrocardiographic biomarkers (QTc and J-Tpeakc interval).
- Being tested
- Clarithromycin, Pimozide, Placebo (Part 1), Moxifloxacin, Cobicistat
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ClarithromycinDrug
Also called Treatment A
Subjects receive the Clarithromycin intervention orally according to the following schedule:
Day 1: 1 Clarithromycin 500 mg immediate release (IR) tablet twice (Clarithromycin 500 mg BID).
Day 2: 2 Clarithromycin 500 mg immediate release (IR) tablets twice (Clarithromycin 1000 mg BID).
Day 3: 2 Clarithromycin 500 mg immediate release (IR) tablets once (Clarithromycin 1000 mg QD).
PimozideDrug
Also called Treatment B
Subjects receive the Pimozide intervention orally according to the following schedule:
Days 1-3: Pimozide 6 mg immediate release (IR) once per day.
Placebo (Part 1)Drug
Also called Treatment C
Subjects receive matching placebo for treatments.
MoxifloxacinDrug
Also called Treatment D
Subjects receive Moxifloxacin 800 mg orally once on day 1.
CobicistatDrug
Also called Treatment E
Subjects receive Cobicistat 450 mg orally once on day 1.
Moxifloxacin and CobicistatDrug
Also called Treatment F
Subjects receive Moxifloxacin 800 mg and Cobicistat 450 mg orally once on day 1.
Placebo (Part 2)Drug
Also called Treatment G
Subjects receive matching placebo for treatments.
| Study group | Role | What they receive |
|---|---|---|
| Part 1: Clarithromycin Administration Only | Active comparator | Subjects in this arm will be administered Clarithromycin only over 3 days of dosing. Receives: Drug: Clarithromycin |
| Part 1: Pimozide Administration Only | Active comparator | Subjects in this arm will be administered Pimozide only over 3 days of dosing. Receives: Drug: Pimozide |
| Part 1: Placebo | Placebo comparator | Subjects in this arm will not be administered any drug. Will serve as placebo comparator arm. Receives: Drug: Placebo (Part 1) |
| Part 2: Moxifloxacin Administration Only | Active comparator | Subjects in this arm will be administered Moxifloxacin only for 1 day of dosing. Receives: Drug: Moxifloxacin |
| Part 2: Cobicistat Administration Only | Active comparator | Subjects in this arm will be administered Cobicistat only for 1 day of dosing. Receives: Drug: Cobicistat |
| Part 2: Moxifloxacin and Cobicistat Administration | Active comparator | Subjects in this arm will be administered both Cobicistat and Moxifloxacin for 1 day of dosing. Receives: Drug: Moxifloxacin and Cobicistat |
| Part 2: Placebo | Placebo comparator | Subjects in this arm will not be administered any drug. Will serve as placebo comparator arm. Receives: Drug: Placebo (Part 2) |
What is being measured
The primary outcome is the main question the study is designed to answer.
Part 1: Plasma concentration of pimozide and clarithromycin associated with ΔΔQTc prolongation of 10 ms based on concentration-QTc analysis.
Measured: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 2: ΔΔJ-TpeakC between cobicistat and moxifloxacin compared to moxifloxacin based on ECG timepoint analysis.
Measured: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
Secondary outcomes (6)
Part 1: ΔΔQTc for pimozide and clarithromycin at maximum drug concentration on day 3 based on concentration-QTc analysis.
Measured: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 1: ΔΔJ-TpeakC for pimozide and clarithromycin at maximum drug concentration on day 3 based on concentration-QTc analysis.
Measured: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 1: The margin (ratio) between hERG IC50 and free plasma concentration causing 10 ms QTc prolongation.
Measured: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 2: ΔΔQTc between cobicistat and moxifloxacin compared to moxifloxacin based on ECG timepoint analysis.
Measured: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
Part 2: ΔΔQTc for moxifloxacin, cobicistat, and moxifloxacin + cobicistat compared to placebo based on ECG timepoint analysis.
Measured: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
Part 2: ΔΔJ-Tpeakc for moxifloxacin, cobicistat, and moxifloxacin + cobicistat compared to placebo based on ECG timepoint analysis.
Measured: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted8 Feb 2023
- Study start21 Mar 2023
- Primary completion13 Jun 2023
- Study completion13 Jun 2023
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (17)Papers the sponsor has linked to this study.
- Other trials for Drug-induced QT ProlongationStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Crossover
- Model description
- This clinical study consists of 2 parts: a 3-arm, 22-subject crossover study (Part 1) and a 4-arm, 22-subject crossover study (Part 2). These parts are included in the same protocol and study due to the similarity of the inclusion and exclusion criteria, similar procedures, and similar primary goals.
- Masking
- Quadruple blind
- Who is masked
- Participant, Care provider, Investigator, Outcomes assessor
- Enrolment
- 44 participants (actual)
Sponsor and investigators
- Lead sponsor
- Food and Drug Administration (FDA)
- Sponsor type
- US federal agency
- Collaborators
- Spaulding Clinical Research LLC
- Responsible party
- Sponsor
- Investigators
- Jennifer Boston, MSN, APNP, Principal investigator, Spaulding Clinical Research LLC
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05716854
- Sponsor's protocol ID
- SCR-014
- Status last verified
- Jun 2023
- First submitted
- 27 Jan 2023
- Last updated
- 22 Jun 2023
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- Yes
- FDA-regulated device
- No
- Individual data sharing
- Yes: Plan is to make data from the study publicly available as part of a manuscript publication. In addition, the protocol and statistical analysis plan will be made available online at this site as well as with any eventual publications.
Publications
Darpo B, Benson C, Dota C, Ferber G, Garnett C, Green CL, Jarugula V, Johannesen L, Keirns J, Krudys K, Liu J, Ortemann-Renon C, Riley S, Sarapa N, Smith B, Stoltz RR, Zhou M, Stockbridge N. Results from the IQ-CSRC prospective study support replacement of the thorough QT study by QT assessment in the early clinical phase. Clin Pharmacol Ther. 2015 Apr;97(4):326-35. doi: 10.1002/cpt.60.
PubMed 25670536Dutta S, Chang KC, Beattie KA, Sheng J, Tran PN, Wu WW, Wu M, Strauss DG, Colatsky T, Li Z. Optimization of an In silico Cardiac Cell Model for Proarrhythmia Risk Assessment. Front Physiol. 2017 Aug 23;8:616. doi: 10.3389/fphys.2017.00616. eCollection 2017.
PubMed 28878692Li Z, Ridder BJ, Han X, Wu WW, Sheng J, Tran PN, Wu M, Randolph A, Johnstone RH, Mirams GR, Kuryshev Y, Kramer J, Wu C, Crumb WJ Jr, Strauss DG. Assessment of an In Silico Mechanistic Model for Proarrhythmia Risk Prediction Under the CiPA Initiative. Clin Pharmacol Ther. 2019 Feb;105(2):466-475. doi: 10.1002/cpt.1184. Epub 2018 Aug 27.
PubMed 30151907Chang KC, Dutta S, Mirams GR, Beattie KA, Sheng J, Tran PN, Wu M, Wu WW, Colatsky T, Strauss DG, Li Z. Uncertainty Quantification Reveals the Importance of Data Variability and Experimental Design Considerations for in Silico Proarrhythmia Risk Assessment. Front Physiol. 2017 Nov 21;8:917. doi: 10.3389/fphys.2017.00917. eCollection 2017.
PubMed 29209226Li Z, Dutta S, Sheng J, Tran PN, Wu W, Chang K, Mdluli T, Strauss DG, Colatsky T. Improving the In Silico Assessment of Proarrhythmia Risk by Combining hERG (Human Ether-a-go-go-Related Gene) Channel-Drug Binding Kinetics and Multichannel Pharmacology. Circ Arrhythm Electrophysiol. 2017 Feb;10(2):e004628. doi: 10.1161/CIRCEP.116.004628.
PubMed 28202629Sager PT, Gintant G, Turner JR, Pettit S, Stockbridge N. Rechanneling the cardiac proarrhythmia safety paradigm: a meeting report from the Cardiac Safety Research Consortium. Am Heart J. 2014 Mar;167(3):292-300. doi: 10.1016/j.ahj.2013.11.004. Epub 2013 Dec 2.
PubMed 24576511McCreadie RG, Heykants JJ, Chalmers A, Anderson AM. Plasma pimozide profiles in chronic schizophrenics. Br J Clin Pharmacol. 1979 May;7(5):533-4. doi: 10.1111/j.1365-2125.1979.tb01001.x. No abstract available.
PubMed 475950Polis MA, Piscitelli SC, Vogel S, Witebsky FG, Conville PS, Petty B, Kovacs JA, Davey RT Jr, Walker RE, Falloon J, Metcalf JA, Craft C, Lane HC, Masur H. Clarithromycin lowers plasma zidovudine levels in persons with human immunodeficiency virus infection. Antimicrob Agents Chemother. 1997 Aug;41(8):1709-14. doi: 10.1128/AAC.41.8.1709.
PubMed 9257746Vance E, Watson-Bitar M, Gustavson L, Kazanjian P. Pharmacokinetics of clarithromycin and zidovudine in patients with AIDS. Antimicrob Agents Chemother. 1995 Jun;39(6):1355-60. doi: 10.1128/AAC.39.6.1355.
PubMed 7574530Darpo B, Benson C, Brown R, Dota C, Ferber G, Ferry J, Jarugula V, Keirns J, Ortemann-Renon C, Pham T, Riley S, Sarapa N, Ticktin M, Zareba W, Couderc JP. Evaluation of the Effect of 5 QT-Positive Drugs on the JTpeak Interval - An Analysis of ECGs From the IQ-CSRC Study. J Clin Pharmacol. 2020 Jan;60(1):125-139. doi: 10.1002/jcph.1502. Epub 2019 Aug 5.
PubMed 31378962Johannesen L, Vicente J, Mason JW, Erato C, Sanabria C, Waite-Labott K, Hong M, Lin J, Guo P, Mutlib A, Wang J, Crumb WJ, Blinova K, Chan D, Stohlman J, Florian J, Ugander M, Stockbridge N, Strauss DG. Late sodium current block for drug-induced long QT syndrome: Results from a prospective clinical trial. Clin Pharmacol Ther. 2016 Feb;99(2):214-23. doi: 10.1002/cpt.205. Epub 2015 Nov 28.
PubMed 26259627Mathias AA, German P, Murray BP, Wei L, Jain A, West S, Warren D, Hui J, Kearney BP. Pharmacokinetics and pharmacodynamics of GS-9350: a novel pharmacokinetic enhancer without anti-HIV activity. Clin Pharmacol Ther. 2010 Mar;87(3):322-9. doi: 10.1038/clpt.2009.228. Epub 2009 Dec 30.
PubMed 20043009Newman LM, Kankam M, Nakamura A, Conrad T, Mueller J, O'Donnell J, Osborn BL, Gu K, Saviolakis GA. Thorough QT Study To Evaluate the Effect of Zoliflodacin, a Novel Therapeutic for Gonorrhea, on Cardiac Repolarization in Healthy Adults. Antimicrob Agents Chemother. 2021 Nov 17;65(12):e0129221. doi: 10.1128/AAC.01292-21. Epub 2021 Oct 4.
PubMed 34606332Johannesen L, Vicente J, Gray RA, Galeotti L, Loring Z, Garnett CE, Florian J, Ugander M, Stockbridge N, Strauss DG. Improving the assessment of heart toxicity for all new drugs through translational regulatory science. Clin Pharmacol Ther. 2014 May;95(5):501-8. doi: 10.1038/clpt.2013.238. Epub 2013 Dec 12.
PubMed 24336137Holford NH, Coates PE, Guentert TW, Riegelman S, Sheiner LB. The effect of quinidine and its metabolites on the electrocardiogram and systolic time intervals: concentration--effect relationships. Br J Clin Pharmacol. 1981 Feb;11(2):187-95. doi: 10.1111/j.1365-2125.1981.tb01123.x.
PubMed 7213522
Study at a glance
From the registry record, last updated by the sponsor on 22 Jun 2023. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Clinical ECG Study to Evaluate Electrophysiological Effects of Potential QT Prolonging Drugs With Novel ECG Biomarkers With Exposure-Response Analysis
- ClinicalTrials.gov ID
- NCT05716854
- Acronym / sponsor ID
- SCR-014
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 44 participants (actual)
- Lead sponsor
- Food and Drug Administration (FDA)US federal agency
- Collaborators
- Spaulding Clinical Research LLC
- Study start
- 21 Mar 2023 (actual)
- Primary completion
- 13 Jun 2023 (actual)
- Study completion
- 13 Jun 2023 (actual)
- First posted
- 8 Feb 2023 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Since 2005, FDA has required almost all new drugs be tested for their ability to prolong the QT interval through clinical studies. This requirement stems from the increased TdP risk QT interval prolongation can cause. However, the QT interval is an imperfect biomarker, as there are multiple drugs that can prolong the QT interval, without causing increased TdP occurrence. As such, numerous drugs labeled as causing QT prolongation, may in fact have no impact on TdP occurrence.
To address this problem, FDA, in collaboration with multiple external partners, has led an initiative to combine novel preclinical in vitro experiments within silico modeling and simulation followed by pharmacodynamic electrocardiographic (ECG) biomarkers. The goal is to use these novel computational and analytical tools to better predict TdP risk (beyond just the QT interval) by focusing on understanding the underlying mechanisms and applying an integrated biological systems approach.
This clinical study consists of 2 parts: a 3-arm, 22-subject crossover study (Part 1) and a 4-arm, 22-subject crossover study (Part 2). These parts are included in the same protocol and study due to the similarity of the inclusion and exclusion criteria, similar procedures, and similar primary goals.
Detailed description
The risk of drug-induced Torsades de Pointes (TdP), a potentially fatal ventricular arrhythmia, has resulted in multiple drugs worldwide being removed from the market, as well as over 150 drugs being listed on CredibleMeds.org for QT prolongation or TdP association. In response, since 2005, FDA has required almost all new drugs be tested for their ability to prolong the QT interval through clinical studies. This requirement stems from the increased TdP risk QT interval prolongation can cause. However, the QT interval is an imperfect biomarker, as there are multiple drugs that can prolong the QT interval, without causing increased TdP occurrence. As such, numerous drugs labeled as causing QT prolongation, may in fact have no impact on TdP occurrence. While this labeling affects physician prescribing, it also has the potential to limit effective therapeutic options for patients.
To address this problem, FDA, in collaboration with multiple external partners, has led an initiative to combine novel preclinical in vitro experiments within silico modeling and simulation followed by pharmacodynamic electrocardiographic (ECG) biomarkers. The goal is to use these novel computational and analytical tools to better predict TdP risk (beyond just the QT interval) by focusing on understanding the underlying mechanisms and applying an integrated biological systems approach.
Recently, the International Council on Harmonization (ICH) released a new Guideline with updated Questions and Answers (Q\&As) to the clinical (ICH E14) and nonclinical (ICH S7B) Guidelines for assessing the QT prolongation and proarrhythmic risk of non-antiarrhythmic drugs. The Q\&A provides more guidance on the use of an integrated nonclinical analysis to support clinical QT assessment. This includes the comparison of the hERG safety margin of the investigational product to the safety margin of predominant hERG (the human Ether-à-go-go-Related Gene) blockers with a characterization of the concentration-QTc relationship based on a limited set of example drugs, i.e., ondansetron, moxifloxacin and dofetilide.
This clinical study consists of 2 parts: a 3-arm, 22-subject crossover study (Part 1) and a 4-arm, 22-subject crossover study (Part 2). These parts are included in the same protocol and study due to the similarity of the inclusion and exclusion criteria, similar procedures, and similar primary goals.
Part 1: Intermediate risk predominant hERG blocking drugs The FDA performed a literature review and identified 28 proarrhythmic drugs from available in vitro studies of cardiac ion channel IC50 (using HEK293 cells and the hERG 1a subunit). Two of these drugs, classified as intermediate risk "predominant hERG blocking" (pimozide and clarithromycin), have been identified as candidates for evaluation in Part 1. An aim of this study will be generating higher quality QT data on "intermediate risk" "predominant hERG" blocking drugs' effect on both electrocardiographic biomarkers, QTc and J-Tpeakc interval prolongation, at therapeutic and supratherapeutic exposures. These data will also be used to support assessment of the hERG safety margin threshold together with moxifloxacin, dofetilide, and ondansetron as described in the recently released ICH Q\&A's.
Part 2: Combination of hERG and multi-ion channel block Part 2 of this study will assess the effects of a mixed ion channel blocking drug, cobicistat, on the QTc and J-Tpeakc interval alone and in combination with a predominant hERG blocking drug (moxifloxacin). Clinical data with cobicistat, a structural analog of ritonavir used as a pharmacokinetic enhancer in various anti-viral regimens, has demonstrated QTc shortening and PR prolongation with supratherapeutic doses. Whether this is a results of late sodium block, calcium channel block, or other features is unclear. Additional clinical data with cobicistat alone or in combination with moxifloxacin will enhance our understanding of the effects of mixed ion channel blocking on electrocardiographic biomarkers (QTc and J-Tpeakc interval).
Study design
- Primary purpose
- Other
- Allocation
- Randomised
- Intervention model
- Crossover
- Masking
- Quadruple blind (participant, care provider, investigator, outcomes assessor)
- Number of arms
- 7
- Model description
- This clinical study consists of 2 parts: a 3-arm, 22-subject crossover study (Part 1) and a 4-arm, 22-subject crossover study (Part 2). These parts are included in the same protocol and study due to the similarity of the inclusion and exclusion criteria, similar procedures, and similar primary goals.
| Arm | Type | Receives |
|---|---|---|
| Part 1: Clarithromycin Administration Only | Active comparator | Drug: ClarithromycinSubjects in this arm will be administered Clarithromycin only over 3 days of dosing. |
| Part 1: Pimozide Administration Only | Active comparator | Drug: PimozideSubjects in this arm will be administered Pimozide only over 3 days of dosing. |
| Part 1: Placebo | Placebo comparator | Drug: Placebo (Part 1)Subjects in this arm will not be administered any drug. Will serve as placebo comparator arm. |
| Part 2: Moxifloxacin Administration Only | Active comparator | Drug: MoxifloxacinSubjects in this arm will be administered Moxifloxacin only for 1 day of dosing. |
| Part 2: Cobicistat Administration Only | Active comparator | Drug: CobicistatSubjects in this arm will be administered Cobicistat only for 1 day of dosing. |
| Part 2: Moxifloxacin and Cobicistat Administration | Active comparator | Drug: Moxifloxacin and CobicistatSubjects in this arm will be administered both Cobicistat and Moxifloxacin for 1 day of dosing. |
| Part 2: Placebo | Placebo comparator | Drug: Placebo (Part 2)Subjects in this arm will not be administered any drug. Will serve as placebo comparator arm. |
Who may qualify
- Ages
- 18 to 50 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (8 listed)
- Subject has signed an IRB approved written informed consent and privacy language as per national regulations (e.g., Health Insurance Portability and Accountability Act authorization) before any study related procedures are performed.
- Subject is a healthy non-smoker who weighs at least 50 kg (110 lbs) and has a body mass index of 18.5 to 33.0 kg/m2, inclusive, at Screening.
- Subject has normal medical history findings, clinical laboratory results, vital sign measurements, pulse oximetry, 12-lead ECG results, and physical examination findings at screening or, if abnormal, the abnormality is not considered clinically significant (as determined and documented by the investigator or designee).
- Subject must have a negative test result for alcohol and drugs of abuse at screening and check-in days.
- Subject must test negative for severe acute respiratory syndrome corona virus 2 (SARS-CoV-2) by a rapid antigen test at check-in for all study periods.
Key exclusion criteria (32 listed)
- Subject has a 12-lead safety ECG result at Screening or check-in (Day -1) with evidence of any of the following abnormalities:
- Subject has a history of unexplained syncope, structural heart disease, long QT syndrome, heart failure, myocardial infarction, angina, unexplained cardiac arrhythmia, torsade de pointes, ventricular tachycardia, or placement of a pacemaker or implantable defibrillator. Subjects shall also be excluded if there is a family history of long QT syndrome (genetically proven or suggested by sudden death of a close relative due to cardiac causes at a young age) or Brugada syndrome.
- Subject has used any prescription or nonprescription drugs (including aspirin or NSAIDs and excluding oral contraceptives and acetaminophen) within 14 days or 5 half-lives (whichever is longer) or complementary and alternative medicines within 28 days before the first dose of study drug. This includes prescription or nonprescription ophthalmic drugs. Note the only two drugs permitted are oral contraceptives and acetaminophen.
- Subject is currently participating in another clinical study of an investigational drug or has been treated with any investigational drug within 30 days or 5 half-lives (whichever is longer) of dosing for this study.
- Subject has used nicotine-containing products (e.g., cigarettes, cigars, chewing tobacco, snuff, electronic cigarettes) within 6 weeks of Screening. Subjects must refrain from using these throughout the study.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ClarithromycinAlso: Treatment ASubjects receive the Clarithromycin intervention orally according to the following schedule: Day 1: 1 Clarithromycin 500 mg immediate release (IR) tablet twice (Clarithromycin 500 mg BID). Day 2: 2 Clarithromycin 500 mg immediate release (IR) tablets twice (Clarithromycin 1000 mg BID). Day 3: 2 Clarithromycin 500 mg immediate release (IR) tablets once (Clarithromycin 1000 mg QD). | Drug | Part 1: Clarithromycin Administration Only |
| PimozideAlso: Treatment BSubjects receive the Pimozide intervention orally according to the following schedule: Days 1-3: Pimozide 6 mg immediate release (IR) once per day. | Drug | Part 1: Pimozide Administration Only |
| Placebo (Part 1)Also: Treatment CSubjects receive matching placebo for treatments. | Drug | Part 1: Placebo |
| MoxifloxacinAlso: Treatment DSubjects receive Moxifloxacin 800 mg orally once on day 1. | Drug | Part 2: Moxifloxacin Administration Only |
| CobicistatAlso: Treatment ESubjects receive Cobicistat 450 mg orally once on day 1. | Drug | Part 2: Cobicistat Administration Only |
| Moxifloxacin and CobicistatAlso: Treatment FSubjects receive Moxifloxacin 800 mg and Cobicistat 450 mg orally once on day 1. | Drug | Part 2: Moxifloxacin and Cobicistat Administration |
| Placebo (Part 2)Also: Treatment GSubjects receive matching placebo for treatments. | Drug | Part 2: Placebo |
Primary outcome
Part 1: Plasma concentration of pimozide and clarithromycin associated with ΔΔQTc prolongation of 10 ms based on concentration-QTc analysis.
Time frame: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 2: ΔΔJ-TpeakC between cobicistat and moxifloxacin compared to moxifloxacin based on ECG timepoint analysis.
Time frame: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
6 secondary outcomes
Part 1: ΔΔQTc for pimozide and clarithromycin at maximum drug concentration on day 3 based on concentration-QTc analysis.
Time frame: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 1: ΔΔJ-TpeakC for pimozide and clarithromycin at maximum drug concentration on day 3 based on concentration-QTc analysis.
Time frame: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 1: The margin (ratio) between hERG IC50 and free plasma concentration causing 10 ms QTc prolongation.
Time frame: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours
Part 2: ΔΔQTc between cobicistat and moxifloxacin compared to moxifloxacin based on ECG timepoint analysis.
Time frame: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
Part 2: ΔΔQTc for moxifloxacin, cobicistat, and moxifloxacin + cobicistat compared to placebo based on ECG timepoint analysis.
Time frame: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
Part 2: ΔΔJ-Tpeakc for moxifloxacin, cobicistat, and moxifloxacin + cobicistat compared to placebo based on ECG timepoint analysis.
Time frame: -1, -0.5, 0 (pre-dose), 0.5, 1, 2, 2.5, 3, 3.5, 4, 5, 6, 8, 14, and 24 hours
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Jun 2023.
- Background: PubMed 25670536Darpo B, Benson C, Dota C, Ferber G, Garnett C, Green CL, Jarugula V, Johannesen L, Keirns J, Krudys K, Liu J, Ortemann-Renon C, Riley S, Sarapa N, Smith B, Stoltz RR, Zhou M, Stockbridge N. Results from the IQ-CSRC prospective study support replacement of the thorough QT study by QT assessment in the early clinical phase. Clin Pharmacol Ther. 2015 Apr;97(4):326-35. doi: 10.1002/cpt.60.
- Background: PubMed 28878692Dutta S, Chang KC, Beattie KA, Sheng J, Tran PN, Wu WW, Wu M, Strauss DG, Colatsky T, Li Z. Optimization of an In silico Cardiac Cell Model for Proarrhythmia Risk Assessment. Front Physiol. 2017 Aug 23;8:616. doi: 10.3389/fphys.2017.00616. eCollection 2017.
- Background: PubMed 30151907Li Z, Ridder BJ, Han X, Wu WW, Sheng J, Tran PN, Wu M, Randolph A, Johnstone RH, Mirams GR, Kuryshev Y, Kramer J, Wu C, Crumb WJ Jr, Strauss DG. Assessment of an In Silico Mechanistic Model for Proarrhythmia Risk Prediction Under the CiPA Initiative. Clin Pharmacol Ther. 2019 Feb;105(2):466-475. doi: 10.1002/cpt.1184. Epub 2018 Aug 27.
- Background: PubMed 29209226Chang KC, Dutta S, Mirams GR, Beattie KA, Sheng J, Tran PN, Wu M, Wu WW, Colatsky T, Strauss DG, Li Z. Uncertainty Quantification Reveals the Importance of Data Variability and Experimental Design Considerations for in Silico Proarrhythmia Risk Assessment. Front Physiol. 2017 Nov 21;8:917. doi: 10.3389/fphys.2017.00917. eCollection 2017.
- Background: PubMed 28202629Li Z, Dutta S, Sheng J, Tran PN, Wu W, Chang K, Mdluli T, Strauss DG, Colatsky T. Improving the In Silico Assessment of Proarrhythmia Risk by Combining hERG (Human Ether-a-go-go-Related Gene) Channel-Drug Binding Kinetics and Multichannel Pharmacology. Circ Arrhythm Electrophysiol. 2017 Feb;10(2):e004628. doi: 10.1161/CIRCEP.116.004628.
- Background: PubMed 24576511Sager PT, Gintant G, Turner JR, Pettit S, Stockbridge N. Rechanneling the cardiac proarrhythmia safety paradigm: a meeting report from the Cardiac Safety Research Consortium. Am Heart J. 2014 Mar;167(3):292-300. doi: 10.1016/j.ahj.2013.11.004. Epub 2013 Dec 2.
- Background: PubMed 475950McCreadie RG, Heykants JJ, Chalmers A, Anderson AM. Plasma pimozide profiles in chronic schizophrenics. Br J Clin Pharmacol. 1979 May;7(5):533-4. doi: 10.1111/j.1365-2125.1979.tb01001.x. No abstract available.
- Background: PubMed 9257746Polis MA, Piscitelli SC, Vogel S, Witebsky FG, Conville PS, Petty B, Kovacs JA, Davey RT Jr, Walker RE, Falloon J, Metcalf JA, Craft C, Lane HC, Masur H. Clarithromycin lowers plasma zidovudine levels in persons with human immunodeficiency virus infection. Antimicrob Agents Chemother. 1997 Aug;41(8):1709-14. doi: 10.1128/AAC.41.8.1709.
- Background: PubMed 7574530Vance E, Watson-Bitar M, Gustavson L, Kazanjian P. Pharmacokinetics of clarithromycin and zidovudine in patients with AIDS. Antimicrob Agents Chemother. 1995 Jun;39(6):1355-60. doi: 10.1128/AAC.39.6.1355.
- Background: PubMed 31378962Darpo B, Benson C, Brown R, Dota C, Ferber G, Ferry J, Jarugula V, Keirns J, Ortemann-Renon C, Pham T, Riley S, Sarapa N, Ticktin M, Zareba W, Couderc JP. Evaluation of the Effect of 5 QT-Positive Drugs on the JTpeak Interval - An Analysis of ECGs From the IQ-CSRC Study. J Clin Pharmacol. 2020 Jan;60(1):125-139. doi: 10.1002/jcph.1502. Epub 2019 Aug 5.
- Background: PubMed 26259627Johannesen L, Vicente J, Mason JW, Erato C, Sanabria C, Waite-Labott K, Hong M, Lin J, Guo P, Mutlib A, Wang J, Crumb WJ, Blinova K, Chan D, Stohlman J, Florian J, Ugander M, Stockbridge N, Strauss DG. Late sodium current block for drug-induced long QT syndrome: Results from a prospective clinical trial. Clin Pharmacol Ther. 2016 Feb;99(2):214-23. doi: 10.1002/cpt.205. Epub 2015 Nov 28.
- Background: PubMed 20043009Mathias AA, German P, Murray BP, Wei L, Jain A, West S, Warren D, Hui J, Kearney BP. Pharmacokinetics and pharmacodynamics of GS-9350: a novel pharmacokinetic enhancer without anti-HIV activity. Clin Pharmacol Ther. 2010 Mar;87(3):322-9. doi: 10.1038/clpt.2009.228. Epub 2009 Dec 30.
- Individual participant dataSharing planned: Yes. Plan is to make data from the study publicly available as part of a manuscript publication. In addition, the protocol and statistical analysis plan will be made available online at this site as well as with any eventual publications.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Jennifer Boston, MSN, APNP principal investigator
Spaulding Clinical Research LLC
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Clarithromycin, Pimozide and Moxifloxacin in people with Drug-induced QT Prolongation and Pharmacokinetics, run by Food and Drug Administration (FDA) at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 8 inclusion and 32 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 22 Jun 2023. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Part 1: Plasma concentration of pimozide and clarithromycin associated with ΔΔQTc prolongation of 10 ms based on concentration-QTc analysis. (time frame: 1, 2, 2.5, 3, 4, 6, 8, 14, and 24 hours). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05716854, which also lists 17 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Jun 2023.