GLP-1 Signaling in Truncally Vagotomized Subjects

May 20, 2018 updated by: Simon Veedfald, University of Copenhagen

Vagal Mechanisms Mediating the Effects of Glucagon-Like Peptide 1 (GLP-1) on the Endocrine Pancreas - the Entero-endocrine Axis.

Investigation of the importance of vagal signaling for the glucohomeostatic effects of GLP-1. The study will include physiological studies of truncally vagotomized participants and matched controls.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Unknown

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Anticipated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
24

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Denmark
      • Copenhagen, Denmark, 2100
        • Recruiting
        • Department of Surgery C, Rigshospitalet
        • Principal Investigator:
          • Simon Veedfald, MD
        • Contact:
          • Simon Veedfald, MD
          • Phone Number: +45 41 10 25 95
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Male

Description

Truncally vagotomized individuals:

Inclusion Criteria:

  • Normal fasting plasma glucose
  • Normal haemoglobin concentration
  • Cardiaresection with a pyloroplasty
  • Informed consent

Exclusion Criteria:

  • Diabetes mellitus
  • Disposition for diabetes mellitus
  • Intestinal disease (apart from cardia resection+pyloroplasty)
  • Disposition of inflammatory bowel disease
  • Intestinal resection (apart from cardia resection+pyloroplasty)
  • Body mass index (BMI) > 27,5 kg/m2
  • Tobacco use
  • Nephropathy (se-creatinine> 130 µM and/or albuminuria)
  • Liver disease (ALAT and/or ASAT >2 × refference value)
  • known heart condition
  • medicinal use, that may not be paused for 12 hours
  • Obstipation
  • swallowing difficulties
  • previous problems with intestinal tube placement
  • Latex allergy
  • Fructose malabsorption
  • Known diseases in the pharynx
  • Previous facial or cranial fractures
  • Sinusitis
  • Bleeding diathesis

Matched controls:

Inclusion Criteria:

  • Normal fasting plasma glucose
  • Normal haemoglobin concentration
  • Informed consent

Exclusion Criteria:

  • Cardiaresection with a pyloroplasty
  • Diabetes mellitus
  • Disposition for diabetes mellitus
  • Intestinal disease (apart from cardia resection+pyloroplasty)
  • Disposition of inflammatory bowel disease
  • Intestinal resection tarmresektion (apart from cardia resection+pyloroplasty)
  • Body mass index (BMI) > 27,5 kg/m2
  • Tobacco use
  • Nephropathy (se-creatinine> 130 µM and/or albuminuria)
  • Liver disease (ALAT and/or ASAT >2 × refference value)
  • known heart condition
  • medicinal use, that may not be paused for 12 hours
  • Obstipation
  • swallowing difficulties
  • previous problems with intestinal tube placement
  • Latex allergy
  • Fructose malabsorption
  • Known diseases in the pharynx
  • Previous facial or cranial fractures
  • Sinusitis
  • Bleeding diathesis

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Enteral fructose with DPP-4 inhibition

Enteral fructose + DPP-4 inhibition (sitagliptin)

After DPP4 inhibition using Tablet Sitagliptin 100mg on the evening before and on the morning of experimentation enteral fructose is given via an intestinal tube (intrajejunal) to either truncally vagotomised and control individuals.
Drug: Tablet Sitagliptin 100mg (evening before and morning of experiments)
On one of two experiment days participants will have Dipeptidyl peptidase 4 activity inhibited using a DPP-4 inhibitor (Sitagliptin).
Other: Intestinal Fructose administration
On both experimental days fructose (35g dissolved in water, total volume 100mL) will be administered via an intrajejunal tube
Experimental: Enteral fructose without DPP-4 inhibition
Enteral fructose without DPP-4 inhibition (sitagliptin) After DPP4 inhibition using Tablet Sitagliptin 100mg on the evening before and on the morning of experimentation enteral fructose is given via an intestinal tube (intrajejunal) to either truncally vagotomised and control individuals.
Other: Intestinal Fructose administration
On both experimental days fructose (35g dissolved in water, total volume 100mL) will be administered via an intrajejunal tube

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Insulin secretion
Time Frame: up to 4 hours
Evaluated by c-peptide and insulin levels - Plasma collected up to 4 hours will be analyzed for peptide hormones
up to 4 hours

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Glucagon secretion
Time Frame: 4 hours
Plasma collected over 4 hours will be analyzed for peptide hormones
4 hours
Glucose levels
Time Frame: 4 hours
Plasma collected over 4 hours will be analyzed for glucose
4 hours
Pancreatic Polypeptide levels
Time Frame: 4 hours
Plasma collected over 4 hours will be analyzed for peptide hormones
4 hours
GIP secretion
Time Frame: 4 hours
Plasma collected over 4 hours will be analyzed for peptide hormones
4 hours

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Copenhagen

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Rigshospitalet, Denmark

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
June 1, 2016

Primary Completion (Anticipated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 1, 2018

Study Completion (Anticipated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 1, 2018

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
April 7, 2016

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 19, 2016

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 20, 2016

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
May 22, 2018

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
May 20, 2018

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • UC/RH-vago-GLP-1

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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