SER-262 Versus Placebo in Adults With Primary Clostridium Difficile Infection to Prevent Recurrence

Seres Therapeutics

Status and phase: Completed; Phase 1

Conditions: Clostridium Difficile Infection

Treatments: Drug: Placebo; Drug: SER-262

Study type: Interventional

Funder types: Industry

Identifiers

NCT02830542

SER-262-001

Details and patient eligibility

About

The study will involve administering a single dose of investigational drug or placebo in ascending dose cohorts. This study is designed to evaluate the safety and tolerability of investigational drug as well as the efficacy of investigational drug versus placebo in adults with primary (first episode) Clostridium difficile infection (CDI).

Full description

SER-262-001 is a Phase 1b, randomized, double blind, placebo-controlled, ascending single dose clinical study with 2 treatment arms (SER-262 or placebo) in up to 8 dose cohorts. Patients who have been diagnosed with their first (primary) episode of CDI, defined as diarrhea (≥ 3 unformed stools per day for 2 consecutive days), a positive C. difficile stool test and who have responded to standard-of-care antibiotic will receive investigational drug or placebo on Day 1.

Enrollment: 96 patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Signed informed consent, indicating that the subject understands the purpose of and procedures required for the study.
2. Male or female subjects ≥ 18 years.
3. A primary (first) episode of CDI with documentation of the episode including CDI date, test results, antibiotic treatment (including start and stop dates), and response to treatment

Exclusion criteria

1. Females who are pregnant, breastfeeding, lactating, or planning to become pregnant during the study.
2. Known or suspected toxic megacolon and/or known small bowel ileus.
3. Active irritable bowel syndrome with diarrhea within the previous 12 months.
4. Major gastrointestinal surgery (eg, significant bowel resection or diversion) within 3 months before enrollment (this does not include appendectomy or cholecystectomy) or any history of total colectomy or bariatric surgery.
5. History of inflammatory bowel disease (ulcerative colitis, Crohn's disease, microscopic colitis) with diarrhea believed to be caused by active inflammatory bowel disease in the past 12 months.
6. Estimated glomerular filtration rate (eGFR) < 60 ml/min/1.73m2
7. Admitted to or expected to be admitted to an intensive care unit for medical reasons (not just boarding). Patients discharged from an intensive care unit before Day 1 may be enrolled.
8. Concurrent intensive induction chemotherapy, radiotherapy, or biologic treatment for active malignancy (patients on maintenance chemotherapy may only be enrolled after consultation with medical monitor).
9. Absolute neutrophil count < 500 cells/mm3

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Quadruple Blind

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96 participants in 2 patient groups, including a placebo group

SER-262

Experimental group

Description:

SER-262 \[Single dose: 10(4), 10(5), 10(6), 10(7) or 10(8) SCFUs; Multiple dose 10(6), 10(7), or 10(8) SCFUs\]

Treatment:

Drug: SER-262

Placebo

Placebo Comparator group

Description:

Placebo

Treatment:

Drug: Placebo