Dietary Sugar Absorptive Phenotype for Prediction of Weight Loss Outcome

Dietary Sugar Hyper-absorptive Intestinal Phenotype as a Predictor of Weight Loss Post-bariatric Surgery

This study is trying to determine whether the success of bariatric surgery can be predicted by evaluating the dietary sugar absorptive characteristics in the small intestine and if there is any gene expression change on the dietary sugar absorptive characteristics.

Study Overview

• Status: Enrolling by invitation
• Conditions: Healthy; Bariatric Surgery Candidate; Obese
• Intervention / Treatment: Procedure: Endoscopic biopsy

• Study Type: Observational
• Enrollment (Estimated): 52

Contacts and Locations

Study Locations

• United States
  • Florida
    • Jacksonville, Florida, United States, 32224
      • Mayo Clinic Florida

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 14 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: Yes

• Sampling Method: Non-Probability Sample

Study Population

Obese patients scheduled for bariatric surgery (BS) (both men and women of any racial/ethnic background), or lean BS-naïve subjects presenting for surveillance/screening endoscopy procedure as part of their standard medical care (controls).

Description

Inclusion Criteria:

- Obese patients (BMI ≥ 30) scheduled for BS undergoing standard of care screening EGD, or lean BS-naïve individuals (BMI ≤ 25) subjected to EGD for routine clinical indications as part of standard care.

Exclusion Criteria:

• Adults unable to consent, including non-English speakers.
• Pregnant women because endoscopy is a risk factor. All patients of childbearing age undergo history as well as urine pregnancy test as a standard of care prior to undergoing endoscopy as the procedure is performed under anesthesia.
• Prisoners.
• Subjects with preexisting conditions (e.g., bleeding at the time of the procedure, suspected perforation during the standard-of-care procedure) will be excluded from the study at the time of the endoscopy.
• Have a contraindication to endoscopy.
• A history of surgery on the stomach or small intestine.
• Type 1 diabetes (clinical diagnosis and/or positive glutamic acid decarboxylase antibodies).
• Using weight loss medications.
• Active malignancy within the last 5 years.

Study Plan

How is the study designed?

Design Details

• Observational Models: Case-Control
• Time Perspectives: Prospective

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
Obese patients scheduled for Bariatric surgery; Subjects scheduled for Bariatric Surgery (BS) and will receive pre-BS Esophagogastroduodenoscopy (EGD) as a part of your standard care will have biopsies from the small intestine taken during the EGD procedure for this study.	Procedure: Endoscopic biopsy; Upper small intestinal biopsies from patients undergoing BS will be collected during routine standard of care screening EGD and again from the same patients at 1 year during routine standard of care surveillance EGD (esophageal reflux screening/surveillance). Biopsy-derived enteroid cultures and tissue samples from pre- and one-year post BS will be examined for expression level of sugar transporters and gluconeogenic enzymes; glucose and fructose absorption
Lean controls naive to Bariatric surgery; Subjects presenting for surveillance/screening EGD procedure as part of their standard medical care will have biopsies from the small intestine taken during the EGD procedure for this study.	Procedure: Endoscopic biopsy; Upper small intestinal biopsies from patients undergoing BS will be collected during routine standard of care screening EGD and again from the same patients at 1 year during routine standard of care surveillance EGD (esophageal reflux screening/surveillance). Biopsy-derived enteroid cultures and tissue samples from pre- and one-year post BS will be examined for expression level of sugar transporters and gluconeogenic enzymes; glucose and fructose absorption

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Number of obese patients with altered dietary sugar hyper-absorptive phenotype after bariatric surgery	18 months

Secondary Outcome Measures

Outcome Measure	Time Frame
Epigenetic changes measured in the intestinal mucosa of obese patients with dietary sugar hyper-absorptive phenotype after bariatric surgery	18 months

Collaborators and Investigators

• Sponsor: Mayo Clinic
• Investigators: Principal Investigator: Dilhana Badurdeen, MBBS, MD, Mayo Clinic

Publications and helpful links

Helpful Links

• Mayo Clinic Clinical Trials

Study record dates

Study Major Dates

• Study Start (Actual): July 10, 2022
• Primary Completion (Estimated): August 1, 2026
• Study Completion (Estimated): August 1, 2026

Study Registration Dates

• First Submitted: June 2, 2022
• First Submitted That Met QC Criteria: June 2, 2022
• First Posted (Actual): June 7, 2022

Study Record Updates

• Last Update Posted (Estimated): September 10, 2025
• Last Update Submitted That Met QC Criteria: September 4, 2025
• Last Verified: September 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Nutrition Disorders; Overnutrition; Body Weight; Overweight; Pathological Conditions, Signs and Symptoms; Nutritional and Metabolic Diseases; Signs and Symptoms; Obesity; Diagnostic Techniques and Procedures; Diagnosis; Surgical Procedures, Operative; Minimally Invasive Surgical Procedures; Diagnostic Techniques, Surgical; Endoscopy, Gastrointestinal; Endoscopy, Digestive System; Diagnostic Techniques, Digestive System; Endoscopy; Digestive System Surgical Procedures; Endoscopic Mucosal Resection
• Other Study ID Numbers: 22-001407

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No