Taste Physiology in Obese Volunteers Before and After Bariatric Surgery

NCT ID: NCT02902198

Last Updated: 2025-04-03

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

RECRUITING

Clinical Phase

NA

Total Enrollment

16 participants

Study Classification

INTERVENTIONAL

Study Start Date

2014-12-31

Study Completion Date

2027-12-31

Brief Summary

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The objective is to investigate neuro-anatomical correlates of gastrointestinal taste stimulation by means of functional MRI before and after bariatric surgery. Intragastric administration of glucose, monosodium glutamate, chloroquine and placebo is followed by functional brain MRI in obese humans before and 3 months after surgery.

Detailed Description

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Conditions

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Obesity

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

TRIPLE

Participants Caregivers Investigators

Study Groups

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Placebo preoperative

Single intragastric instillation of 200ml tap water via nasogastric tube

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DIETARY_SUPPLEMENT

Tap water 200ml

Placebo postoperative

Single intragastric instillation of 200ml tap water via nasogastric tube

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DIETARY_SUPPLEMENT

Tap water 200ml

Glucose preoperative

Single intragastric instillation of 200ml tap water with 25g glucose via nasogastric tube

Group Type ACTIVE_COMPARATOR

Glucose

Intervention Type DIETARY_SUPPLEMENT

25g Glucose in 200ml tap water

Glucose postoperative

Single intragastric instillation of 200ml tap water with 25g glucose via nasogastric tube

Group Type ACTIVE_COMPARATOR

Glucose

Intervention Type DIETARY_SUPPLEMENT

25g Glucose in 200ml tap water

Monosodium glutamate preoperative

Single intragastric instillation of 200ml tap water with 1g monosodium glutamate via nasogastric tube

Group Type ACTIVE_COMPARATOR

Monosodium glutamate

Intervention Type DIETARY_SUPPLEMENT

1g monosodium glutamate in 200ml tap water

Monosodium glutamate postoperative

Single intragastric instillation of 200ml tap water with 1g monosodium glutamate via nasogastric tube

Group Type ACTIVE_COMPARATOR

Monosodium glutamate

Intervention Type DIETARY_SUPPLEMENT

1g monosodium glutamate in 200ml tap water

Quinine preoperative

Single intragastric instillation of 200ml tap water with 17mg quinine via nasogastric tube

Group Type ACTIVE_COMPARATOR

Quinine

Intervention Type DIETARY_SUPPLEMENT

17mg quinine in 200ml tap water

Quinine postoperative

Single intragastric instillation of 200ml tap water with 17mg quinine via nasogastric tube

Group Type ACTIVE_COMPARATOR

Quinine

Intervention Type DIETARY_SUPPLEMENT

17mg quinine in 200ml tap water

Interventions

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Placebo

Tap water 200ml

Intervention Type DIETARY_SUPPLEMENT

Glucose

25g Glucose in 200ml tap water

Intervention Type DIETARY_SUPPLEMENT

Monosodium glutamate

1g monosodium glutamate in 200ml tap water

Intervention Type DIETARY_SUPPLEMENT

Quinine

17mg quinine in 200ml tap water

Intervention Type DIETARY_SUPPLEMENT

Eligibility Criteria

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Inclusion Criteria

* morbidly obese patients (BMI min 35kg/m2) scheduled for bariatric surgery
* right handed

Exclusion Criteria

* cardiovascular disease
* neurologic/psychiatric disorders
Minimum Eligible Age

18 Years

Maximum Eligible Age

55 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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University Hospital, Basel, Switzerland

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Christoph Beglinger, Prof

Role: STUDY_CHAIR

University Basel

Locations

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University Hopital Basel

Basel, , Switzerland

Site Status RECRUITING

Countries

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Switzerland

Central Contacts

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Bettina Wölnerhanssen, Dr

Role: CONTACT

Facility Contacts

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Bettina Wölnerhanssen, Dr

Role: primary

Other Identifiers

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fMRI Taste 2

Identifier Type: -

Identifier Source: org_study_id

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