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Pharmacogenetics of Response to GLP1R Agonists
Who can join
Ages 18 to 89 · All sexes · Healthy volunteers welcome
Full eligibility criteria
Inclusion Criteria: * BMI greater than or equal to 27 kg/m2 * Of Amish Descent Exclusion Criteria: * Woman of childbearing age who is sexually active * History of diabetes (HbA1c \> 6.5% or random glucose \>200 mg/dL) * Known allergy to semaglutide * Medical issues, which in the judgment of the research physician or PIs might increase the risk associated with participation in the study * eGFR \< 60 mL/min/1.73 sq. m. * Hematocrit \< 35% * TSH \< 0.4 o4 \> 5.5 * AST or ALT in excess of 2X the upper limit of normal * Unable to discontinue a drug, vitamin, or nutritional supplement, which in the judgment of the research physician or PIs might alter the response to semaglutide * Personal or family history of medullary carcinoma of the thyroid or multiple endocrine neoplasia, type 2
About the study
Overweight/obese otherwise healthy volunteers will be recruited from the Old Order Amish population in Lancaster County, PA. Lancaster County, PA. Pharmacodynamic responses to GLP1R agonist will be assessed by conducting frequently sampled intravenous glucose tolerance tests (FSIGT) both before and after semaglutide for six weeks. The proposal proposes two specific aims:
1. Specific Aim #1. To identify genetic variants associated with effects of a GLP1R agonist to enhance glucose-stimulated first phase insulin secretion in the two FSIGTs (before and after administration of drug). 2. Specific Aim #2. To identify genetic variants associated with the effect of a GLP1R agonist to accelerate the rate of glucose disappearance as assessed in the two FSIGTs (before and after administration of drug).
Genotyping will be conducted using a high-density array with comprehensive coverage of DNA sequence variants. In addition, the analysis will leverage a global imputation panel generated from 1,025 Amish individuals.
What is being tested
- Semaglutide Pen Injector [Ozempic] (drug)
Sponsor: University of Maryland, Baltimore · Participants: 600 · Started: Apr 11, 2022
Contact the study team
- Amber L Beitelshees, PharmD · Phone: (410)706-0118
- Simeon I Taylor, MD, PhD · Phone: (410)706-6439
Official record on ClinicalTrials.gov — NCT05071898
Locations in the U.S.
| Pennsylvania | Amish Research Clinic, Lancaster |
Conditions
From ClinicalTrials.gov, data retrieved Sep 30, 2026. Each study sets its own eligibility; the study team decides who can join.