Improving Diabetes After Bariatric Surgery

NCT ID: NCT00676923

Last Updated: 2012-11-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

63 participants

Study Classification

OBSERVATIONAL

Study Start Date

2008-03-31

Study Completion Date

2012-10-31

Brief Summary

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The goal of this project is to examine the physical mechanisms that contribute to improvements of glucose tolerance in type 2 diabetes mellitus (DM) following certain types of bariatric surgery.

Detailed Description

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The goal of this project is to examine the physiological mechanisms that contribute to improvements of glucose homeostasis in type 2 diabetes mellitus (DM) following gastric bypass Roux-en-Y bariatric surgery (GBP). The central hypotheses are: 1) that surgical changes in the anatomy of nutrient absorption achieved by GBP change incretin hormone secretion which in turn improves pancreatic islet function; and 2) that improvement in insulin secretion induced by the changes in incretin function, together with improvement in insulin resistance induced by weight loss, normalize glucose homeostasis in type 2 DM.

Funds are not available to pay for the surgery for patients, only to address research questions.

Conditions

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Obesity Diabetes

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Eligibility Criteria

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Inclusion Criteria

* Patients who are at least 18 years of age and undergo bariatric surgery by a LABS certified surgeon.
* Enrollment in LABS-1 or LABS-2.
* Documented type 2 diabetes (fasting plasma glucose greater than 125 mg/dl) that is treated with lifestyle efforts (drug naïve) or taking acceptable oral medications (see appendix) with a HgA1c less than or equal to 8.5% and a fasting blood glucose less than or equal to 180 mg/dL. This will be one group.
* Non-diabetic (ND) with normal values for fasting glucose and HbA1c. This will be the second group.
* Adequate IV access.

Exclusion Criteria

* Informed consent not obtained.
* Patient with diabetes with an HbA1c greater than 8.5% or a fasting blood glucose greater than 180 mg/dL.
* Creatinine greater than 1.7.
* Unlikely to comply with the 6 month follow-up (post-surgical) protocol (i.e. geographically inaccessible for study visits) or unable to communicate with local study staff.
* Use of unacceptable diabetic medications (see appendix) at baseline (see appendix).
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)

NIH

Sponsor Role collaborator

University of Pittsburgh

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Jonathan Purnell, MD

Role: STUDY_DIRECTOR

Oregon Health and Science University

Locations

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Legacy Good Samaritan Hospital

Portland, Oregon, United States

Site Status

Oregon Health and Science University

Portland, Oregon, United States

Site Status

University of Pittsburgh Medical Center

Pittsburgh, Pennsylvania, United States

Site Status

University of Washington

Seattle, Washington, United States

Site Status

Virginia Mason Medical Center

Seattle, Washington, United States

Site Status

Countries

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United States

Related Links

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Other Identifiers

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U01DK066557

Identifier Type: NIH

Identifier Source: secondary_id

View Link

DK6657_3b

Identifier Type: -

Identifier Source: org_study_id