- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT04521803
High vs. Standard Dose Rifampicin for Effusive Tuberculous Pericarditis (IMPI-3)
IMPI-3 - A Randomized Controlled Trial of High vs. Standard Dose Rifampicin for Effusive Tuberculous Pericarditis
The investigators hypothesise that high dose RIF (RIF35) will increase pericardial fluid RIF exposure and so enhance mycobacterial clearance, compared to standard of care dosing (RIF10).
This Phase 2b randomized, placebo-controlled, double-blinded trial will evaluate the efficacy and safety of RIF 35mg/kg compared 10mg/kg, added to standard first-line ATT, for the treatment of PCTB.
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
IMPI-3 - A Randomized Controlled Trial of High vs. Standard Dose Rifampicin for Effusive Tuberculous Pericarditis
Phase 2b Randomized, placebo-controlled, double-blinded clinical trial
The trial will enroll 100 adult participants with pericardial TB from two research sites in South Africa, with no exclusions being made on the basis of sex/gender, racial or ethnic group.
Consenting participants will be stratified by HIV status and PCF GX-Ultra status, then randomized 1:1 to receive either standard of care anti-tuberculosis treatment (ATT) or standard of care plus high dose Rifampicin (RIF), both administered orally for 2 months, followed by a continuation phase of 4 months' RH at standard doses.
Study Type
Enrollment (Estimated)
Phase
- Phase 2
Contacts and Locations
Study Contact
- Name: Mpumi U Maxebengula, BCom
- Phone Number: 0727633386
- Email: mpumi.maxebengula@uct.ac.za
Study Contact Backup
- Name: Kishal Maxebengula, Dr
- Phone Number: +27732515380 +27732515380
- Email: kishal.lukhna@uct.ac.za
Study Locations
-
-
Eastern Cape
-
Mthatha, Eastern Cape, South Africa, 5099
- Not yet recruiting
- Nelson Mandela Academic Hospital
-
Contact:
- Mpumi Maxebengula, BCom
- Phone Number: 0727633386
- Email: mpumi.maxebengula@uct.ac.za
-
Contact:
- Samuel Yao Alomatu, Dr
- Phone Number: +27475316257
- Email: samalomatu@yahoo.com
-
Principal Investigator:
- Khulile Moeketsi, Dr
-
Sub-Investigator:
- Samuel Alomatu, Dr
-
Sub-Investigator:
- Thandazile Obed Fathuse, Dr
-
Sub-Investigator:
- Pamela Mda, Dr
-
-
Western Cape
-
Cape Town, Western Cape, South Africa, 7925
- Recruiting
- Groote Schuur Hospital
-
Principal Investigator:
- Mpiko Ntsekhe, PhD
-
Contact:
- Nompumelelo Maxebengula, Bcom
- Phone Number: +27727633386
- Email: mpumi.maxebengula@uct.ac.za
-
Contact:
- Kishal Lukhna, Dr
- Phone Number: +27732515380
- Email: kishal.lukhna@uct.ac.za
-
Sub-Investigator:
- Robert J Wilkinson, PhD
-
Sub-Investigator:
- Sean Wasserman, PhD
-
Sub-Investigator:
- Kishal Lukhna, Dr
-
Sub-Investigator:
- Vanessa Mabiala, Dr
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Aged >18 years
- Suspected PCTB with confirmed pericardial effusion on echocardiography (i.e., echo free space of ≥1 cm anterior to the right ventricle in diastole)
- Consent to study participation including testing for HIV-1 (if HIV status is unknown)
Microbiologically detected Mtb in PCF or diagnosis of probable PCTB. Probable PCTB (in the absence of a positive pericardial fluid culture) will be defined as per Mayosi et al.4:
- Evidence of pericarditis with microbiologic confirmation of Mtb- infection elsewhere in the body and/or
- Exudative, lymphocyte predominant effusion with elevated adenosine deaminase (≥35 U/L)
- Participant will undergo pericardiocentesis (as per clinical indication)
- Within 5 days of ATT initiation
Exclusion Criteria:
- Glomerular filtration rate <30ml/min or renal failure requiring dialysis
- Rifampin-resistant TB
- Severe concurrent opportunistic infection
- Contraindication to placement of intra-pericardial catheter
- Failed pericardiocentesis procedure and/or failure of placement of intra-pericardial catheter
- Any disease or condition in which the use of the standard anti-TB drugs (or any of their components) are contraindicated. This includes, but is not limited to, allergy to any TB drug or their components.
- In females: a positive urine pregnancy test result
- Confirmed autoimmune disorders (e.g. systemic lupus erythematosus)
Additional Exclusions for Gadolinium contrasted CMR
- Any implanted devices that are not MR compatible (e.g. pacemaker, defibrillators, cerebral aneurysm clips, cochlear implants etc.)
- Claustrophobia
- Gadolinium allergy
- Inability to lie on a flat surface for prolonged periods of time (e.g. severe congestive cardiac failure)
- Breastfeeding
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Triple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
No Intervention: Arm 1: Standard of care (RIF10)
Dosing of the daily oral RHZE fixed dose combination (FDC) will be according to WHO weight bands
|
|
Experimental: Arm 2: High-dose RIF (RIF35)
Simulations were performed to determine the dose of RIF required to achieve the most equitable drug exposures across the weight range, 30 to 100 kg.
Demographic data of a reference cohort of TB patients (n = 1225), with or without HIV-1 coinfection, recruited in clinical trials conducted in West Africa and South Africa were used for the simulations35-38.
An additional 12 250 virtual patients were generated using the weight and height distributions of the 1225 patients to increase the number of patients with a weight close to the boundaries of the weight range.
Parameter estimates of the population PK model for RIF were used to simulate (100 replicates) RIF exposures22.
Four dosing scenarios were evaluated using the weight-band based dosing with 4-drug FDC tablets and extra RIF tablets with each tablet containing 150 mg or 600 mg RIF.
The FDC tablets were assumed to have 20% reduced bioavailability based on data from a clinical trial where the same formulation was used39
|
Simulations were performed to determine the dose of RIF required to achieve the most equitable drug exposures across the weight range, 30 to 100 kg.
Demographic data of a reference cohort of TB patients (n = 1225), with or without HIV-1 coinfection, recruited in clinical trials conducted in West Africa and South Africa were used for the simulations35-38.
An additional 12 250 virtual patients were generated using the weight and height distributions of the 1225 patients to increase the number of patients with a weight close to the boundaries of the weight range.
Parameter estimates of the population PK model for RIF were used to simulate (100 replicates) RIF exposures22.
Four dosing scenarios were evaluated using the weight-band based dosing with 4-drug FDC tablets and extra RIF tablets with each tablet containing 150 mg or 600 mg RIF.
The FDC tablets were assumed to have 20% reduced bioavailability based on data from a clinical trial where the same formulation was used
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Drug exposure in PCF and mediates in Mtb load
Time Frame: 72 hours and 52 weeks
|
To determine whether higher dose rifampicin (35mg/kg) increases pericardial fluid (AUC) RIF levels and increases time to positivity of mycobacterial culture at 72 hours compared to standard dose Rifampicin
|
72 hours and 52 weeks
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Mortality between study arms
Time Frame: week 8 and 52 weeks
|
To investigate clinical outcome by mortality (attributable to PCTB and all cause)
|
week 8 and 52 weeks
|
re-accumulation of pericardial effusion between study arms
Time Frame: 52 weeks
|
To investigate clinical outcome by comparing clinical evidence of constrictive pericarditis between study arms
|
52 weeks
|
TB-IRIS between study arms
Time Frame: 52 weeks
|
To investigate clinical outcome by comparison of the incidence of TB immune reconstitution inflammatory syndrome (TB-IRIS) between study arms
|
52 weeks
|
Constrictive pericarditis between the study arms
Time Frame: 52 weeks
|
Comparison of the incidence of constrictive pericarditis between the study arms
|
52 weeks
|
CMR evidence
Time Frame: 52 weeks
|
To investigate clinical outcome by evidence on week 52 CMR of:
|
52 weeks
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
To investigate the safety and tolerability of RIF35 for PCTB by:
Time Frame: week 8 and 52 weeks
|
|
week 8 and 52 weeks
|
Discontinuation rate
Time Frame: 52 weeks
|
Comparison of discontinuation rates between study arms Comparison of discontinuation rates between study arms
|
52 weeks
|
Change in Mtb bacterial load
Time Frame: 72 hours
|
To investigate early change in Mtb bacterial load by measures other than culture TTP (CFU, Xpert ct values, ddPCR, CEQ, Mtb RNA, FujiLAM) in PCF over 72 hours by treatment allocation
|
72 hours
|
Relationships between pericardial Mtb-specific T cells with Mtb bacterial load
Time Frame: 52 weeks
|
To determine relationships between pericardial Mtb-specific T cells with Mtb bacterial load, treatment response and outcome in PCTB
|
52 weeks
|
Mtb-induced markers of host cell death pathways and Mtb bacterial load in PCTB
Time Frame: 52 weeks
|
To assess whether there is association between Mtb-induced markers of host cell death pathways and Mtb bacterial load in PCTB
|
52 weeks
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Mpiko U Ntsekhe, Professor, Department of Cardiology, Groote Schuur Hospital
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Estimated)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Heart Diseases
- Cardiovascular Diseases
- Infections
- Bacterial Infections
- Bacterial Infections and Mycoses
- Gram-Positive Bacterial Infections
- Actinomycetales Infections
- Mycobacterium Infections
- Cardiovascular Infections
- Tuberculosis, Cardiovascular
- Tuberculosis, Extrapulmonary
- Tuberculosis
- Pericarditis
- Pericarditis, Tuberculous
- Molecular Mechanisms of Pharmacological Action
- Anti-Infective Agents
- Nucleic Acid Synthesis Inhibitors
- Enzyme Inhibitors
- Anti-Bacterial Agents
- Leprostatic Agents
- Cytochrome P-450 Enzyme Inducers
- Cytochrome P-450 CYP3A Inducers
- Antitubercular Agents
- Antibiotics, Antitubercular
- Cytochrome P-450 CYP2B6 Inducers
- Cytochrome P-450 CYP2C8 Inducers
- Cytochrome P-450 CYP2C19 Inducers
- Cytochrome P-450 CYP2C9 Inducers
- Rifampin
Other Study ID Numbers
- IMPI-3 DMID 20-0007
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
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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