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Bezlotoxumab (BEZLO) In Addition To Standard Of Care (SOC) Vancomycin For The Treatment of Multi-Recurrent Clostridium Difficile Infection (BEZLO)

Primary Purpose

Clostridium Difficile Infection Recurrence

Status
Completed
Phase
Phase 4
Locations
United States
Study Type
Interventional
Intervention
bezlotoxumab
Vancomycin Oral
Sponsored by
University of Kansas Medical Center
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Clostridium Difficile Infection Recurrence focused on measuring C.diff, Clostridium Difficile, recurrence, Bezlotoxumab, CDI

Eligibility Criteria

18 Years - undefined (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria (Interventional):

  • i) age 18 years or older;
  • ii) diagnosis of multi-recurrent CDI, defined as passage of 3 or more loose stools in 24 hours or less for at least 2 consecutive days and a positive stool test for toxigenic C. difficile (nucleic acid amplification test [NAAT] and toxin enzyme immunoassay [EIA] positive), with 2 or more confirmed prior CDI episodes;
  • iii) receiving or planning to receive a 10- to 14-day course of SOC therapy with oral VAN followed by a tapered VAN regimen for at least 4 weeks;
  • iv) patient highly unlikely to become pregnant due to being female and not of reproductive potential or female of reproductive potential agreeing to be abstinent or using 2 acceptable methods of birth control starting at enrollment and through the 16-week study period; and
  • v) patient or legal representative voluntarily agreeing to participate by providing written informed consent after the nature of the study has been fully explained.

Inclusion Criteria (Historical Control):

  • i) age 18 years or older
  • ii) diagnosis of multi-recurrent CDI
  • iii) received 10- to 14-day course of SOC therapy with oral VAN followed by a tapered VAN regimen.

Exclusion Criteria:

  • i) active chronic diarrheal illness, such as (but not limited to) ulcerative colitis or Crohn's disease or with a condition such that they routinely pass loose stool
  • ii) planned surgery for CDI within 24 hours
  • iii) positive pregnancy test in the 48 hours before the infusion or unwilling to undergo pregnancy testing if a pre-menopausal female who is not sterilized and therefore has the potential to bear a child
  • iv) breastfeeding or planning to breastfeed prior to the completion of the study period
  • v) previous receipt of BEZLO
  • vi) receipt of immune globulin within 6 months prior to enrollment or planning to receive immune globulin prior to completion of the 16-week study period
  • vii) receipt of non-SOC CDI therapy within 14 days prior to enrollment
  • viii) planned treatment with SOC therapy for longer than 6 weeks
  • ix) receipt of medications to control diarrhea such as loperamide, diphenoxylate hydrochloride/atropine sulfate at any time prior to completion of the 16-week study period
  • x) medical history of decompensated congestive heart failure

Sites / Locations

  • University of Kansas Medical Center

Arms of the Study

Arm 1

Arm Type

Other

Arm Label

BEZLO + SOC taper

Arm Description

Single arm of patients treated with BEZLO + SOC oral VAN pulse/taper.

Outcomes

Primary Outcome Measures

Rate of CDI reoccurrence at 12 weeks
If diarrhea resolves (defined as <2 loose stools per day for at least 2 consecutive days) and subsequently begins again (3 or more loose stools in 24 hours or less for at least 2 consecutive days), this will represent a new episode of diarrhea. If there is a new episode of diarrhea at any time during the 12-week study period, an unscheduled visit will be conducted. A stool sample will be provided for any new episode of diarrhea which occurs and a stool test for toxigenic C. difficile (NAAT plus EIA) will be performed. CDI reoccurrence will be defined as new episode of diarrhea and positive stool test for toxigenic C. difficile (NAAT plus EIA).

Secondary Outcome Measures

Full Information

First Posted
March 11, 2019
Last Updated
May 22, 2022
Sponsor
University of Kansas Medical Center
Collaborators
Merck Sharp & Dohme LLC
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1. Study Identification

Unique Protocol Identification Number
NCT03880539
Brief Title
Bezlotoxumab (BEZLO) In Addition To Standard Of Care (SOC) Vancomycin For The Treatment of Multi-Recurrent Clostridium Difficile Infection
Acronym
BEZLO
Official Title
Historically-controlled Clinical Trial of the Efficacy and Safety of Bezlotoxumab (BEZLO) in Addition to Standard of Care (SOC) Vancomycin for the Treatment of Multi-recurrent Clostridium Difficile Infection (CDI)
Study Type
Interventional

2. Study Status

Record Verification Date
May 2022
Overall Recruitment Status
Completed
Study Start Date
June 25, 2019 (Actual)
Primary Completion Date
November 18, 2021 (Actual)
Study Completion Date
November 18, 2021 (Actual)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Principal Investigator
Name of the Sponsor
University of Kansas Medical Center
Collaborators
Merck Sharp & Dohme LLC

4. Oversight

Studies a U.S. FDA-regulated Drug Product
Yes
Studies a U.S. FDA-regulated Device Product
No
Product Manufactured in and Exported from the U.S.
No
Data Monitoring Committee
No

5. Study Description

Brief Summary
This is a research study to collect information from people that have Clostridium difficile infection (CDI) and are treated with a standard antibiotic treatment in which the antibiotic dose is gradually reduced over 6 weeks and bezlotoxumab (BEZLO), an approved monoclonal antibody targeting C. difficile toxin, which has shown to reduce CID recurrence when used in combination with standard antibiotic treatment.
Detailed Description
Clostridium difficile (C. diff) is a type of bacteria which causes diarrhea in some people who receive antibiotics for other infections. The current antibiotics used to treat C diff infection (CDI) are usually successful in treating the initial episode of CDI, but may not prevent recurrent infection. To prevent recurrent CDI, standard oral antibiotic treatment with vancomycin is extended by gradually reducing the dose over 4-8 weeks. This is called antibiotic taper. Bezlotoxumab (BEZLO), a monoclonal antibody targeting C. difficile toxin B, is an approved medication that has also been shown to reduce CDI recurrence in patients receiving antibacterial drug treatment of CDI. In this study, approximately 12 people with multi-recurrent CDI will be treated with BEZLO in combination with standard oral tapered vancomycin. Study participation will last 16 weeks. The rate of CDI recurrence in this group will be compared to information collected from approximately 72 historical patients with multi-recurrent CDI treated with oral tapered vancomycin only.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Clostridium Difficile Infection Recurrence
Keywords
C.diff, Clostridium Difficile, recurrence, Bezlotoxumab, CDI

7. Study Design

Primary Purpose
Treatment
Study Phase
Phase 4
Interventional Study Model
Single Group Assignment
Model Description
The intervention group will consist of a single arm of patients treated with BEZLO + SOC oral VAN pulse/taper for multi-recurrent CDI, with a planned enrollment of 12 patients. To achieve the aim of the proposed study, we will compare the efficacy of BEZLO + SOC oral VAN pulse/taper to a historical cohort of patients treated with SOC oral VAN pulse/taper only. These patients will be matched 1:6 on criteria previously outlined in this proposal (BEZLO + SOC, n=12; SOC comparator, n=72; total number of patients in study, n=84).
Masking
None (Open Label)
Allocation
N/A
Enrollment
4 (Actual)

8. Arms, Groups, and Interventions

Arm Title
BEZLO + SOC taper
Arm Type
Other
Arm Description
Single arm of patients treated with BEZLO + SOC oral VAN pulse/taper.
Intervention Type
Drug
Intervention Name(s)
bezlotoxumab
Other Intervention Name(s)
Zinplava
Intervention Description
Adding BEZLO to SOC oral VAN pulse/taper
Intervention Type
Drug
Intervention Name(s)
Vancomycin Oral
Other Intervention Name(s)
Firvanq
Intervention Description
SOC vancomycin pulse/taper
Primary Outcome Measure Information:
Title
Rate of CDI reoccurrence at 12 weeks
Description
If diarrhea resolves (defined as <2 loose stools per day for at least 2 consecutive days) and subsequently begins again (3 or more loose stools in 24 hours or less for at least 2 consecutive days), this will represent a new episode of diarrhea. If there is a new episode of diarrhea at any time during the 12-week study period, an unscheduled visit will be conducted. A stool sample will be provided for any new episode of diarrhea which occurs and a stool test for toxigenic C. difficile (NAAT plus EIA) will be performed. CDI reoccurrence will be defined as new episode of diarrhea and positive stool test for toxigenic C. difficile (NAAT plus EIA).
Time Frame
12 weeks

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria (Interventional): i) age 18 years or older; ii) diagnosis of multi-recurrent CDI, defined as passage of 3 or more loose stools in 24 hours or less for at least 2 consecutive days and a positive stool test for toxigenic C. difficile (nucleic acid amplification test [NAAT] and toxin enzyme immunoassay [EIA] positive), with 2 or more confirmed prior CDI episodes; iii) receiving or planning to receive a 10- to 14-day course of SOC therapy with oral VAN followed by a tapered VAN regimen for at least 4 weeks; iv) patient highly unlikely to become pregnant due to being female and not of reproductive potential or female of reproductive potential agreeing to be abstinent or using 2 acceptable methods of birth control starting at enrollment and through the 16-week study period; and v) patient or legal representative voluntarily agreeing to participate by providing written informed consent after the nature of the study has been fully explained. Inclusion Criteria (Historical Control): i) age 18 years or older ii) diagnosis of multi-recurrent CDI iii) received 10- to 14-day course of SOC therapy with oral VAN followed by a tapered VAN regimen. Exclusion Criteria: i) active chronic diarrheal illness, such as (but not limited to) ulcerative colitis or Crohn's disease or with a condition such that they routinely pass loose stool ii) planned surgery for CDI within 24 hours iii) positive pregnancy test in the 48 hours before the infusion or unwilling to undergo pregnancy testing if a pre-menopausal female who is not sterilized and therefore has the potential to bear a child iv) breastfeeding or planning to breastfeed prior to the completion of the study period v) previous receipt of BEZLO vi) receipt of immune globulin within 6 months prior to enrollment or planning to receive immune globulin prior to completion of the 16-week study period vii) receipt of non-SOC CDI therapy within 14 days prior to enrollment viii) planned treatment with SOC therapy for longer than 6 weeks ix) receipt of medications to control diarrhea such as loperamide, diphenoxylate hydrochloride/atropine sulfate at any time prior to completion of the 16-week study period x) medical history of decompensated congestive heart failure
Overall Study Officials:
First Name & Middle Initial & Last Name & Degree
Lisa A Clough, MD
Organizational Affiliation
University of Kansas Medical Center
Official's Role
Principal Investigator
Facility Information:
Facility Name
University of Kansas Medical Center
City
Kansas City
State/Province
Kansas
ZIP/Postal Code
66160
Country
United States

12. IPD Sharing Statement

Learn more about this trial

Bezlotoxumab (BEZLO) In Addition To Standard Of Care (SOC) Vancomycin For The Treatment of Multi-Recurrent Clostridium Difficile Infection

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