A Study of LBP-EC01 in the Treatment of Acute Uncomplicated UTI Caused by Drug Resistant E. Coli (ELIMINATE Trial) (ELIMINATE)

• ClinicalTrials.gov Identifier: NCT05488340
• Recruitment Status: Recruiting
• First Posted: August 4, 2022
• Last Update Posted: April 30, 2024
• Sponsor: Locus Biosciences
• Collaborator: Parexel
• Information provided by (Responsible Party): Locus Biosciences

Tracking Information

• First Submitted Date: August 2, 2022
• First Posted Date: August 4, 2022
• Last Update Posted Date: April 30, 2024
• Actual Study Start Date: July 13, 2022
• Estimated Primary Completion Date: June 2025 (Final data collection date for primary outcome measure)

Current Primary Outcome Measures (submitted: December 15, 2023)

• Part 1: Levels of LBP-EC01 in urine and blood measured by quantitative plaquing assay across the treatment period and over 48 h after the last dose [ Time Frame: Day 1 to Day 5 ]
  The regimen for LBP-EC01 when used concomitantly with TMP/SMX which optimizes pharmacokinetics (PK) for LBP-EC01 will be selected.
• Part 2: Proportion of patients with resolution of clinical symptoms and microbiologic response of uUTI caused by drug resistant E. coli as defined at Day 10 test of cure (TOC). [ Time Frame: Day 10 ]
  The efficacy of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX on resolution of acute uUTI clinical symptoms and demonstration of microbiologic response (CCMR) of acute uUTI caused by drug resistant E. coli will be assessed.

Original Primary Outcome Measures (submitted: August 2, 2022)

• Part 1: Levels of LBP-EC01 in urine and blood measured by quantitative plaquing assay across the treatment period and over 48 h after the last dose [ Time Frame: Day 1 to Day 7 ]
  The regimen for LBP-EC01 when used concomitantly with TMP/SMX which optimizes pharmacokinetics (PK) for LBP-EC01 will be selected.
• Part 2: Proportion of patients with resolution of clinical symptoms of a uncomplicated urinary tract infection (uUTI) and microbiologic response of uUTI caused by multidrug resistant or multidrug resistance (MDR) E. coli as defined at Day 10 [ Time Frame: Day 10 ]
  The efficacy of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX on resolution of acute uUTI symptoms and demonstration of microbiologic response of acute uUTI caused by MDR E. coli will be assessed.

Current Secondary Outcome Measures (submitted: December 15, 2023)

• Part 1: Number of patients with Adverse Events (AEs) and Serious Adverse Events (SAEs) [ Time Frame: Day 1 to Day 34 ]
  The safety and tolerability of LBP-EC01 when given with TMP/SMX will be assessed.
• Part 1: Number of patients with immunogenicity [ Time Frame: Baseline Day 1 to Day 2, Day 5, Day 10, Day 34/Early Termination [ET]) post-hoc ]
  The immunogenicity of LBP-EC01 by measuring neutralizing antibody (NAb) levels will be assessed.
• Part 2: Proportion of patients with antimicrobial drug resistant (AMR) E. coli achieving maintenance of combined clinical and microbiologic response (CCMR) at Day 21. [ Time Frame: Day 21 ]
  The impact of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX on maintenance of CCMR success in those randomized patients with AMR E. coli uUTI demonstrating an initial response will be assessed.
• Part 2: Proportion of patients with CCMR of uUTI caused by E. coli at Day 10/TOC. [ Time Frame: Day 10 ]
  The efficacy of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX, on CCMR of uUTI caused by E. coli (irrespective of drug resistant status) will be assessed.
• Part 2: Proportion of patients with CCMR of uUTI caused by multi-drug resistant (MDR) E. coli at Day 10/TOC. [ Time Frame: Day 21 ]
  The impact of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX on CCMR in patients with uUTI caused by MDR E. coli at Day 10/TOC.
• Part 2: Proportion of patients with MDR E. coli achieving maintenance of CCMR at Day 21. [ Time Frame: Within the 6-month follow-up period ]
  The impact of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX on the maintenance of CCMR in patients with uUTI caused by MDR E. coli at Day 21.

Original Secondary Outcome Measures (submitted: August 2, 2022)

• Part 1: Number of patients with Adverse Events (AEs) and Serious Adverse Events (SAEs) [ Time Frame: Day 1 to Day 21 ]
  The safety and tolerability of LBP-EC01 when given with TMP/SMX will be assessed.
• Part 1: Number of patients with immunogenicity [ Time Frame: Baseline Day 1 to Day 2, Day 5, Day 10, Day 21/Early Termination [ET]) post-hoc ]
  The immunogenicity of LBP-EC01 by measuring neutralizing antibody (NAb) levels will be assessed.
• Part 2: Proportion of patients with MDR E. coli achieving maintenance of clinical and microbiologic response at Day 21 [ Time Frame: Day 21 ]
  The impact of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX on maintenance of clinical (symptom resolution) and microbiologic success in those randomized patients with MDR E. coli uUTI demonstrating an initial response will be assessed.
• Part 2: Proportion of patients with resolution of clinical symptoms of an uncomplicated (uUTI) and microbiologic response of uUTI caused by E. coli at Day 10 [ Time Frame: Day 10 ]
  The efficacy of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX, on resolution of uUTI symptoms and demonstration of microbiologic response of uUTIs caused by E. coli will be assessed.
• Part 2: Proportion of patients with E. coli achieving maintenance of clinical and microbiologic response at Day 21 [ Time Frame: Day 21 ]
  The impact of LBP-EC01 when used concomitantly with TMP/SMX compared to placebo when used concomitantly with TMP/SMX on maintenance of clinical (symptom resolution) and microbiologic success in those randomized patients with E. coli uUTI demonstrating an initial response will be assessed.
• Part 2: Proportion of patients with recurrence of uUTI episodes caused by E. coli within a 6-month follow-up period [ Time Frame: Within the 6-month follow-up period ]
  Patients will be monitored for 6 months for recurrence of uUTI in those with a documented history of prior E. coli infections of the urinary tract.

• Current Other Pre-specified Outcome Measures: Not Provided
• Original Other Pre-specified Outcome Measures: Not Provided

Descriptive Information

• Brief Title: A Study of LBP-EC01 in the Treatment of Acute Uncomplicated UTI Caused by Drug Resistant E. Coli (ELIMINATE Trial)
• Official Title: A Phase 2, Double-blind, Randomized, Active-controlled Evaluation of the Safety, Tolerability, Pharmacokinetics and Efficacy of LBP-EC01 in the Treatment of Acute Uncomplicated Urinary Tract Infection Caused by Drug Resistant E. Coli
• Brief Summary: This is a Phase 2 superiority study of LBP-EC01, a recombinant bacteriophage cocktail, with an initial open-label 3-arm pharmacokinetic (PK) lead-in portion of 30 patients to evaluate the optimal dosing regimen to be used in the subsequent 288 patient blinded portion of the study which will be randomized 1:1 comparing LBP-EC01 + antibiotic versus placebo + antibiotic in patients with a history of prior urinary tract infection (UTI) cased by E. coli. All patients will be required to have an active acute uncomplicated UTI at baseline.

Detailed Description

This study will consist of two parts.

Part 1 - Dose regimen selection: An open-label, 30 patient, 3-arm PK assessment of: Arm 4 (previously 1): LBP-EC01 (approximately 2×10^12 PFU) given by IU administration on D1 and D2 and LBP-EC01 (approximately 1×10^11 PFU) IV given as a 1 milliliter (mL) bolus QD from D1 through D3 concomitantly with oral trimethoprim/sulfamethoxazole (TMP 160mg/SMX 800mg) BID from D1 through D3 (6 doses); Arm 5 (previously 2): LBP-EC01 (approximately 2×10^12 PFU) given by IU administration on D1 and D2 and LBP-EC01 (approximately 1×10^10 PFU) IV given as a 1 mL bolus QD from D1 through D3 concomitantly with oral TMP/SMX BID from D1 through D3 (6 doses); Arm 6 (previously 3): LBP-EC01 (2×10^12 PFU) given by IU administration on D1 and D2 and LBP-EC01 (approximately 1×10^12 PFU) IV given as a 100 mL IV infusion over 2 h on D1 through D3 concomitantly with oral TMP/SMX BID from D1 through D3 (6 doses).

Part 2 - Efficacy, Safety, Tolerability and Pharmacokinetics: A blinded, 288 patient, 1:1 randomized evaluation of the Arm 4 dose regimen, selected from Part 1, versus placebo + antibiotic (TMP/SMX -160 mg TMP and 800 mg SMX) given orally BID on Days 1 through 3.

• Study Type: Interventional
• Study Phase: Phase 2

Study Design

Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Masking Description:

Part 1 - open label, Part 2 - blinded.

Primary Purpose: Treatment

• Condition: Urinary Tract Infections

Intervention

• Drug: LBP-EC01 0.1 x IV dose
  Intraurethral (IU) dose of two (2) x 6mL vials of LBP-EC01 (approximately 2x10^12 PFU) diluted in 188 mL of Lactated Ringer's solution on Day 1 and Day 2. Intravenous (IV) dose of 0.6mL of LBP-EC01 (approximately 1x10^11 PFU) diluted in 0.4mL of Lactated Ringer's solution given on Days 1 through Day 3.
  Other Name: 1x10^11 PFU IV dose
• Drug: LBP-EC01 0.01x IV Dose
  Intraurethral (IU) dose of two (2) x 6mL vials of LBP-EC01 (approximately 2x10^12 PFU) diluted in 188 mL of Lactated Ringer's solution on Day 1 and Day 2. Intravenous (IV) dose of 0.06 mL of LBP-EC01 (approximately 1x10^10 PFU) diluted in 0.94 mL of Lactated Ringer's solution given on Days 1 through Day 3.
  Other Name: 1x10^10 PFU IV Dose
• Drug: LBP-EC01 IV Infusion Dose
  Intraurethral (IU) dose of two (2) x 6mL vials of LBP-EC01 (approximately 2x10^12 PFU) diluted in 188 mL of Lactated Ringer's solution on Day 1 and Day 2. Intravenous infusion dose of 6mL of LBP-EC01 (approximately 1x10^12 PFU) diluted in 94 mL of Lactated Ringer's solution given over 2 hours on Days 1 through Day 3.
  Other Name: 1x10^12 PFU IV Infusion Dose
• Drug: Placebo
  Dose regimen selected from Part 1 of placebo (Tris buffer).
• Drug: LBP-EC01
  Dose regimen selected from Part 1 of LBP-EC01 (1x10^10 - 1x10^13 PFU) per dose.
• Drug: TMP/SMX
  TMP/SMX (160 mg trimethoprim and 800 mg sulfamethoxazole) given orally BID on Days 1 through 3.

Study Arms

• Experimental: Part 1- Arm 4 (previously 1)
  Intraurethral (IU) LBP-EC01 on D1 and D2 with intravenous (IV) LBP-EC01 (1x10^11 PFU) and oral TMP/SMX on D1 through D3.
  Interventions:

  • Drug: LBP-EC01 0.1 x IV dose
  • Drug: TMP/SMX
• Experimental: Part 1- Arm 5 (previously 2)
  Intraurethral (IU) LBP-EC01 on D1 and D2 with intravenous (IV) LBP-EC01 (1x10^10 PFU) and oral TMP/SMX on D1 through D3.
  Interventions:

  • Drug: LBP-EC01 0.01x IV Dose
  • Drug: TMP/SMX
• Experimental: Part 1- Arm 6 (previously 3)
  Intraurethral (IU) LBP-EC01 on D1 and D2 with intravenous (IV) LBP-EC01 infusion (1x10^12 PFU) and oral TMP/SMX on D1 through D3.
  Interventions:

  • Drug: LBP-EC01 IV Infusion Dose
  • Drug: TMP/SMX
• Experimental: Part 2: LBP-EC01
  LBP-EC01 given by dose regimen selected from Part 1. IU LBP-EC01 on D1 and D2 with IV LBP-EC01 (1x10^11 PFU) and oral TMP/SMX on D1 through D3.
  Interventions:

  • Drug: LBP-EC01
  • Drug: TMP/SMX
• Placebo Comparator: Part 2: Placebo
  Placebo given by dose regimen selected from Part 1. IU placebo on D1 and D2 with IV placebo and oral TMP/SMX on D1 through D3.
  Interventions:

  • Drug: Placebo
  • Drug: TMP/SMX

• Publications *: Not Provided

Recruitment Information

• Recruitment Status: Recruiting
• Estimated Enrollment (submitted: December 15, 2023): 318
• Original Estimated Enrollment (submitted: August 2, 2022): 580
• Estimated Study Completion Date: December 2025
• Estimated Primary Completion Date: June 2025 (Final data collection date for primary outcome measure)

Eligibility Criteria

Inclusion Criteria:

• History of UTI in the past 12 months and prior or current uUTI caused by AMR E. coli (as single pathogen or part of polymicrobial infection where E. coli is the predominant pathogen). Please note that the current infection can be used to meet the requirement of AMR E. coli documentation.
• Able to supply a mid-stream, clean catch urine sample for microbiological analysis.

• Active acute uUTI infection defined by:

  a. Evidence of pyuria: i. >10 white blood cell (WBC)/mL3 on microscopic evaluation of spun, clean, mid-stream urine specimen or >3 WBC/high power field on unspun clean, mid-stream urine specimen, AND/OR ii. Dipstick analysis of a clean, mid-stream urine specimen positive for leukocytes, AND/OR b. At least 2 of the following signs or symptoms of UTI: dysuria, urinary frequency, urinary urgency, or suprapubic pain

• Willing to comply with all aspects of study design including study restrictions, blood, urine, and stool sampling, and scheduled study visits.
• All sexually active female patients of childbearing potential must use highly effective contraception during the study and until 2 weeks after the last dose of study drug treatment.
• Agrees to STOP the use of cranberry products, probiotics (Lactobacillus spp), D-mannose, OM-89 (various strains of E. coli), continuous low dose antimicrobial prophylaxis and/or post-coital antimicrobial prophylaxis to prevent UTI for the entire study duration (throughout the 6-month follow-up period or study discharge).
• Agrees to not use any prescription or non-prescription medication for the microbiological or symptomatic treatment of the presenting acute uUTI for the first 10 days of the study.
• Capable of providing their own signed informed consent form (ICF) prior to any study-related procedures being performed.
• If participating in Part 1 of the study, agrees to fast for ≥2 h prior to first dose of study drug on Day 1/Visit 1 except for drinking 240 mL of water with study drug administration.

Exclusion Criteria:

• Signs or symptoms of systemic illness such as fever greater than 38° Centigrade/ Celsius, shaking chills, or other clinical manifestations suggestive of complicated UTI.
• Treatment with other antibacterial drugs including those that are effective for treatment of the acute uUTI or prevention of recurrent UTI in the 5 days prior to Screening unless the recovered pathogen demonstrates resistance to the initial antibiotic and clinical symptoms persist.
• Clinical symptoms for more than 5 days before Screening.
• Presence of indwelling urinary bladder catheters, urinary tract anatomical abnormalities, poorly-controlled diabetes mellitus, immunocompromising condition and/or treatment, or advanced renal disfunction.
• Individuals considered to be immunocompromised.
• Clinically significant serious unstable physical illness that in the investigator's opinion prevents patient from completing the study or prevents interpretation or resolution of clinical symptoms.
• Pregnant or nursing women.
• Exposure to any investigational drugs or other phage therapy 30 days prior to Screening (D1/V1) or prior to participation in this study. Patients who participate in Part 1 are not eligible for participation in Part 2.
• Allergies to excipients of the study drug or antibiotics.
• History of autonomic dysreflexia.
• History of intravenous (IV) drug abuse or is currently using or has positive results for drugs of abuse at screening.
• Patients who reside in a long-term care facility.
• Suspected or confirmed acute coronavirus disease 2019 (COVID-19) or recent COVID-19 infection with ongoing symptoms.

Sex/Gender

• Sexes Eligible for Study: Female
• Gender Based Eligibility: Yes

• Ages: 18 Years to 70 Years (Adult, Older Adult)
• Accepts Healthy Volunteers: No

Contacts

Contact: Locus Clinical Operations; (919) 495-4510; clinicaloperations@locus-bio.com

Contact: Paul Kim; (919) 495-4510; Paul.kim@locus-bio.com

• Listed Location Countries: United States

Administrative Information

• NCT Number: NCT05488340
• Other Study ID Numbers: LBx-2001
• Has Data Monitoring Committee: Yes

U.S. FDA-regulated Product

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No

IPD Sharing Statement

• Plan to Share IPD: No

• Current Responsible Party: Locus Biosciences
• Original Responsible Party: Same as current
• Current Study Sponsor: Locus Biosciences
• Original Study Sponsor: Same as current
• Collaborators: Parexel

Investigators

• Study Director: Paul Kim; Locus Biosciences

• PRS Account: Locus Biosciences
• Verification Date: April 2024