- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05367479
Antibiotics, Gastric Bypass, and the Microbiome
The Effect of Peri-operative Antibiotic Class on Microbiome Changes After Roux-en-Y Gastric Bypass
Study Overview
Status
Intervention / Treatment
Detailed Description
Eligible patients will be reviewed to meet inclusion criteria. Patients will be approached for enrollment at their pre-operative clinic appointment. If patients agree, consent will be signed.
Demographics will be collected on all patients including past medical, surgical and obesity history. Blood pressure will be recorded in the office, hypertensive medication record reviewed, post-operative follow-up and stool samples will be collected at 5 visits (V1-V5): 2 weeks pre-op, day of surgery, 2 weeks post-op, and 3 months post-op. Patients will be randomized at the time of surgery to receive intravenous cefazolin or clindamycin (weight-based dosing) as a pre-operative antibiotic within 60 minutes of incision time. Both antibiotics are routinely used as a single intravenous pre-operative dose for surgical site infection prophylaxis during Roux-en-Y gastric bypass and does not alter the standard of care. In routine care, clindamycin is given when there is a cefazolin allergy. Vancomycin is given if there is an allergy to both. We have a protocol that all bariatric surgeons follow rather than preference. There should be equipoise regarding the risk of a skin, superficial or deep surgical site infection between the two choices.
Hypertension will be considered resolved when the blood pressure is <140/90 without medication. Data points for collection were chosen to identify both short and long-term changes in the microbiome as well as assess for changes in the microbiome related to dietary modifications required with surgery.
Stool samples will be collected from participants in this study. Stool samples will be collected at the convenience of the participant at time points designated in the study design. The participant will be given a stool sample kit(s) to take home during the time of consent. The stool sample will be received by the research laboratory at a follow-up visit, or returned via FedEx with materials supplied in the stool collection kit. Following receipt in the laboratory, the stool samples will be stored in Dr. Kindel's lab (4th floor CRI) at -80 degrees where they will later undergo bacterial genomic DNA and RNA isolation using standardized techniques and later analysis for 16S and metagenomic sequencing analysis.
Study Type
Enrollment (Actual)
Phase
- Phase 1
Contacts and Locations
Study Locations
-
-
Wisconsin
-
Milwaukee, Wisconsin, United States, 53226
- Froedtert Hospital
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria: Patients who are approved for a primary RYGB at MCW's bariatric surgery program as treatment for morbid obesity and obesity-associated co-morbidities. Patients will be eligible who are: 1.) female or male 2.) 18-70 years of age, 3.) hypertensive
Exclusion Criteria: Patients are ineligible if they: 1.) have a diagnosis of cirrhosis, 2.) are taking antibiotics, probiotics, or immune modulating medications for one month prior to or after surgery, 3.) have a history of bowel resections, inflammatory bowel disease and/or celiac disease, 4.) have a life-threatening reaction to penicillin/cephalosporins or clindamycin.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Cefazolin
standard of care as a pre-operative antibiotic given with 60 minutes of incision before gastric bypass surgery.
given intravenous as a single dose, weight based.
|
Peri-operative, intravenous antibiotic for surgical site infection
|
Active Comparator: Clindamycin
also standard of care alternative as a pre-operative antibiotic given with 60 minutes of incision before gastric bypass surgery.
given intravenous as a single dose, weight based.
|
Peri-operative, intravenous antibiotic for surgical site infection
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
operational taxonomic units
Time Frame: 3 months postoperatively
|
a distinct bacterial community
|
3 months postoperatively
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- PRO00030985
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
product manufactured in and exported from the U.S.
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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