The Influence Of GIP (Glucose-Dependent Insulinotropic Polypeptide)

Status Recruiting

Clinical Trial Summary

Study part-1

GIP (glucose-dependent insulinotropic polypeptide) is one of the two main incretin hormones secreted by specialized cells of the gastrointestinal tract in response to ingestion of nutrients. Data emerging from studies in animal models and cultured human fat cells support a physiological role for GIP in the adipose tissue metabolism which may contribute to the pathogenesis of obesity.

The proposed study will shed more light on the interactions between gut hormones and adipose tissue. For this pilot study, male subjects fulfilling the inclusion criteria will be given GIP or placebo infusions in a randomized manner. Fat tissue biopsies will be obtained from all subjects during both visits, once in the basal state (before the start of the peptide/placebo infusion) and then repeated at the end of the period of infusion.

Study part-2

Surgery represents the most effective therapeutic modality for morbid obesity. Resolution of type 2 diabetes mellitus (T2DM) has been consistently observed as an additional benefit of surgical treatment of obesity. The mechanisms underlying the dramatic effects of surgery on insulin sensitivity and β-cell function are poorly understood. Bariatric surgery (gastric bypass) promotes changes in the enteroendocrine system as a result of nutrient diversion from the physiological intestinal routes with subsequent profound modification of gut hormone secretion

We hypothesize that restoration of GIP action after bariatric procedures plays a cardinal role in the improvement and/or restoration of diabetes, we propose to study patients (both sex)with morbid obesity and T2DM within 3 months after their surgery. Their responses will be compared to those of BMI matched control subjects with normal glucose tolerance

Clinical Trial Description

n/a

Study Design

Allocation: Randomized, Endpoint Classification: Pharmacodynamics Study, Intervention Model: Crossover Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Basic Science

Related Conditions & MeSH terms

Adipose Tissue

Clinical Trial Details

NCT number	NCT00809029
Study type	Interventional
Source	Aintree University Hospitals NHS Foundation Trust
Contact	CHRISTINA DAOUSI, MD FRCP
Phone	+44 (0) 151 529 5920
Email	cdaousi@liverpool.ac.uk
Status	Recruiting
Phase	N/A
Start date	April 2011
Completion date	December 2012

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Clinical trials are conducted in a series of steps, called phases - each phase is designed to answer a separate research question.

Phase 1: Researchers test a new drug or treatment in a small group of people for the first time to evaluate its safety, determine a safe dosage range, and identify side effects.
Phase 2: The drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
Phase 3: The drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely.
Phase 4: Studies are done after the drug or treatment has been marketed to gather information on the drug's effect in various populations and any side effects associated with long-term use.

The Influence Of GIP (Glucose-Dependent Insulinotropic Polypeptide) Infusion On Human Adipose Tissue: An In Vivo Study

Clinical Trial Summary

Clinical Trial Description

Study Design

Related Conditions & MeSH terms