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WithdrawnNCT04787250Updated Apr 4, 2022

Bacteriophage Therapy in Patients With Prosthetic Joint Infections

A Phase 1/2 interventional study of Phage Therapy and Two-Stage Exchange Arthroplasty in Prosthetic Joint Infection, sponsored by Adaptive Phage Therapeutics, Inc.. Withdrawn at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-04-04.

Sponsored by Adaptive Phage Therapeutics, Inc. · Phase 1/2, Interventional, and Treatment

Why this study was withdrawn
Changes to protocol design
Phase
Phase 1/2
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

This is a study designed to evaluate bacteriophage therapy in patients with chronic prosthetic joint infections.

Read the detailed description

This is a study designed to evaluate bacteriophage therapy in patients with chronic prosthetic joint infections of the hip or knee caused by 1 or 2 of the following organisms: Staphylococcus aureus, Staphylococcus epidermidis, Staphylococcus lugdunensis, Streptococcus sp., Enterococcus faecium, Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, and/or Klebsiella pneumoniae.

This study will also compare the safety and efficacy of phage therapy in conjunction with antibiotics versus standard of care (SOC) two-stage exchange arthroplasty plus antibiotics.

02

Conditions studied

  • Prosthetic Joint Infection

Keywords

  • Prosthetic
  • Joint
  • Knee
  • Hip
  • Phage
  • Bacteriophage
  • Prosthetic Joint
03

In context

Infections

6,687 studies on the registry are indexed under Infections; 807 are open to participants now.

Browse Infections studies →

Lead sponsor

Adaptive Phage Therapeutics, Inc. is the lead sponsor of 6 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

General Inclusion Criteria:

  • Males or females ≥18 years of age.
  • Female patients of childbearing potential who agree to use contraception.
  • Candidate for a two-stage exchange arthroplasty.
  • Chronic prosthetic joint infection

General Exclusion Criteria:

  • Prior history of prosthetic joint infections (PJI) of same joint treated surgically other than one prior Debridement Antibiotics and Implant Retention procedure
  • Soft tissue defect requiring reconstruction
  • Hardware misalignment or loosening
  • Active osteomyelitis
  • Septic shock or hemodynamic instability
  • Stage 4 or greater chronic kidney disease
  • Liver disease
  • Decompensated cirrhosis
  • Alcohol abuse or alcohol induced liver disease or non-alcoholic steatohepatitis
  • Decompensated heart failure
  • Any other clinically significant disease, per judgement of the investigator
  • Neutropenia (neutrophil count \< 1000 cells/cubic mm), thrombocytopenia (platelets \< 50,000/cubic mm) or aspartate aminotransferase (AST)/ alanine aminotransferase (ALT) > 3 time the upper limit of normal
  • HIV, hepatitis C, hepatitis B infection
  • Positive drug screen
  • Receipt of chemotherapy, immunosuppressants or immune modulators
  • Anti-viral medication
  • Any known phage allergy
  • Breast feeding or pregnancy
05

Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    Arm 1, Phage Therapy with Antibiotic Treatment

    Phage therapy will be administered in conjunction with antibiotic treatment.

    Biological: Phage Therapy

  • Active comparator
    Arm 2, Standard of Care

    Two-stage exchange arthroplasty entails resection arthroplasty and placement of an antibiotic-loaded spacer, antibiotic therapy, an antibiotic-free observation period, and re-implantation of a new prosthesis.

    Procedure: Two-Stage Exchange Arthroplasty

Interventions

  • BiologicalPhage Therapy

    Phage will be administered based on patient's matching results.

    Also known as: Antibiotics

  • ProcedureTwo-Stage Exchange Arthroplasty

    Performed per the study center's standard of care. No investigational products are used.

    Also known as: Antibiotics

06

What researchers measure

Primary outcomes

  1. Safety and tolerability of phage therapy

    Incidence and type of adverse events and infusion reactions

    Time frame: Day 1 through Week 26

Secondary outcomes

  1. Efficacy of phage therapy to prevent need for surgery in patients with hip/knee prosthetic joint infections.

    Proportion of phage-treated patients with no need for surgery by no evidence of a prosthetic joint infection.

    Time frame: 6 weeks after completion of phage therapy

  2. Efficacy of phage therapy in hip joint functionality as assessed by hip disability and osteoarthritis outcome questionnaire score (HOOS).

    Time to reach minimum clinically important difference in hip dysfunction and osteoarthritis outcome score.

    Time frame: Week 26

  3. Efficacy of phage therapy in knee joint functionality as assessed by knee injury and osteoarthritis outcome questionnaire score (KOOS).

    Time to reach minimum clinically important difference in knee injury and osteoarthritis outcome score.

    Time frame: Week 26

07

Study locations

1 site
  • Mayo Clinic
    Rochester, Minnesota 55905, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 4, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04787250
Lead sponsor
Adaptive Phage Therapeutics, Inc.
Collaborators
Mayo Clinic
Responsible party
Sponsor
First posted
Mar 8, 2021
Start date
Oct 2022 (estimated)
Primary completion
May 2023 (estimated)
Completion
May 2024 (estimated)
Last update
Apr 4, 2022

Study contacts

Robert J Hopkins, MD
study director · Adaptive Phage Therapeutics

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in Mar 2022. You cannot join it, but the record below documents what was studied.

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