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Taking people in United StatesPhase 4

Studies how genes affect response to oral semaglutide in type 2 diabetes

Tests oral semaglutide and a standard meal test in adults with type 2 diabetes.

Key facts

Who runs it
Massachusetts General Hospital
Where
Boston, United StatesSee the site
Trial code
Registry title
GLUCOSE-MGH: Genetic Links Understood Through Challenge With Oral Semaglutide Exposure at MGH
Status
Recruiting
Phase
Phase 4
People taking part
125 people, planned
Started
12 Mar 2024
Expected to end
31 May 2027
Type of study
Interventional
Treatments tested
  • oral semaglutide
  • Mixed Meal Tolerance Test (MMTT)
Record updated
8 July 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for adults aged 18 to 65 whose blood sugar is normal or slightly raised (pre-diabetes). It studies how genes change the response to oral semaglutide.

Age
18 to 65 years
Sex
Men and women who are not pregnant.
Disease stage
Blood sugar between normal and pre-diabetes: fasting glucose of 100-125 mg/dL (5.6–6.9 mmol/L), based on existing lab results in the chart.
Earlier treatment
People cannot join if they take, or plan to take, diabetes medicines or medicines that affect blood sugar, such as glucocorticoids, growth hormone or fluoroquinolones.

Main reasons for not taking part

  • Pregnant, nursing, or at risk of becoming pregnant
  • History of intestinal malabsorption, bariatric surgery, celiac disease, gallbladder disease or pancreatitis
  • Personal or family history of medullary thyroid cancer or multiple endocrine neoplasia type 2
  • Kidney function eGFR below 60 ml/min/1.73 m2, or cirrhosis, or liver tests (AST or ALT) more than 3x the upper limit of normal
  • Diet restrictions that prevent eating the test meal, or taking part in other interventional studies

The registry criteria, word for word

Show all 13 criteriaShow less

Who can take part

  • Males or non-pregnant females
  • Ages 18-65 (inclusive)
  • Able/willing to give consent
  • Span the metabolic range between normal glycemia and pre-diabetes (fasting glucose of 100-125 mg/dL based on chart review of existing laboratory data)

Who cannot take part

  • Currently taking medications or intending to take medications for diabetes
  • Currently taking medications or intending to take medications that affect glycemic parameters, such as glucocorticoids, growth hormone, or fluoroquinolones
  • Personal history of intestinal malabsorption, bariatric surgery, celiac disease, gallbladder disease, or pancreatitis
  • Personal or family history of medullary thyroid cancer or multiple endocrine neoplasia type 2
  • History of cirrhosis and/or aspartate aminotransferase or alanine aminotransferase more than 3x upper limit of normal
  • Estimated glomerular filtration rate (eGFR) <60 ml/min/1.73 m2 per the Modification of Diet in Renal Disease equation
  • Dietary restrictions preventing consumption of a MMTT
  • Women who are pregnant, nursing, or at risk of becoming pregnant
  • Participation in other interventional studies during the current study

Check if you might fit

Answer for yourself. This is not a decision: only the study team can say whether you can take part.

  • Are you between 18 and 65 years old?

Where in United States

  • Massachusetts General HospitalBoston, United StatesContact: Varinderpal KaurTaking people

About the trial

What the trial wants to find out

The goal of this research study is to evaluate the pathophysiologic mechanisms by which genetic variation impacts response to an FDA-approved medication commonly used to treat type 2 diabetes called oral semaglutide (Rybelsus) and to characterize the physiological response to a mixed meal tolerance test (MMTT) before and after a 14-day treatment with oral semaglutide. The investigators will do this by measuring factors in the blood, such as sugars, fats, metabolites, and proteins, after eating a standardized breakfast meal at the first visit and after taking 14 doses of oral semaglutide over two weeks before the second study visit. The food (mixed meal breakfast) we will be studying is specially prepared to contain a set amount of protein, carbohydrates, and fat. The investigators hypothesize that understanding how the acute biochemical response to oral semaglutide differs by genetic variation will generate insight into drug mechanisms and type 2 diabetes pathophysiology.

The group in the trial

  • GLUCOSE-MGH StudyOther group

    Day 1: Mixed meal tolerance test Day 3-15: 7 mg oral semaglutide, once daily Day 16: 1 dose of 7 mg oral semaglutide, Mixed meal tolerance test in the presence of semaglutide

    Treatment: oral semaglutide and Mixed Meal Tolerance Test (MMTT)

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
GLUCOSE-MGH: Genetic Links Understood Through Challenge With Oral Semaglutide Exposure at MGH
Plain-language title
Studies how genes affect response to oral semaglutide in type 2 diabetesGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Fit questions
Built from NCT06003153, who can take part
Record updated
8 July 2026