The Effects of Bariatric Surgeries on Glucose Metabolism
Purpose
The purpose of this study is learn the effect of gastric bypass surgery and sleeve gastrectomy on glucose metabolism mediated by neural and hormonal factors initiated after eating.
Conditions
- Post Bariatric Surgery
- Gastric Bypass
- Sleeve Gastrectomy
- Hypoglycemia After Gastric Bypass
Eligibility
- Eligible Ages
- Between 18 Years and 65 Years
- Eligible Genders
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- Hypoglycemic RYGB patients with documented blood glucose level <50 mg/dl - Asymptomatic individuals with bariatric surgery - Healthy non-surgical patients with no personal history of diabetes - Subjects must physically be able to come to our clinical research center Cedars-Sinai Medical Center
Exclusion Criteria
- Active heart, lung, liver, gastrointestinal or kidney disease; unable to give informed consent; pregnancy; uncontrolled high blood pressure or high cholesterol; significant anemia (hemoglobin <11g/dL); prisoners or institutionalized individuals; type 2 diabetes mellitis; development of any serious medical or psychiatric illness during recruitment or studies; - RYGB patients will be disqualified if they have gastric outlet obstruction or severe diarrhea. - Healthy non-surgical patients with personal history of diabetes For administration of atropine, the following exclusions also apply: - History of glaucoma - Uncontrolled hypertension (any subjects with BP>140/90 and history of dyslipidemia - Taking any medication that might interact with atropine and cannot be stopped will be excluded from the study) - Myasthenia gravis - Brain pathology - Enlarged prostate in men
Study Design
- Phase
- Early Phase 1
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Crossover Assignment
- Primary Purpose
- Other
- Masking
- Single (Participant)
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
|
Experimental Exendin-(9-39) |
To evaluate the role of GLP-1 on glucose metabolism and insulin secretin after glucose and protein ingestion. |
|
|
Experimental Atropine |
to evaluate the effect of neural activation on insulin secretion and glucose metabolism |
|
Recruiting Locations
Texas Diabetes Institute - University Health System
San Antonio, Texas 78207
San Antonio, Texas 78207
South Texas Veterans Health Care System
San Antonio, Texas 78229
San Antonio, Texas 78229
More Details
- Status
- Recruiting
- Sponsor
- The University of Texas Health Science Center at San Antonio
Detailed Description
The purpose of this study is to determine the weight-independent effects of gastric bypass surgery and sleeve gastrectomy surgery on islet cell response after meal ingestion as mediated by hormonal and neural components of the gut. It will also address the differences between the two procedures. Such information will be critical for the development of novel approaches for treatment of diabetes as well as improvement of glycemic effects of gastric bypass and sleeve gastrectomy in patients with partial diabetes remission or relapse after complete remission.