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RecruitingAccepts healthy volunteersPhase 1

The Role of Glucagon in Glucose Metabolism in Humans With and Without Bariatric Surgery

The University of Texas Health Science Center at San Antonio · with National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) · NCT07212868

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Opens the official ClinicalTrials.gov record, with the study team’s contacts. Bored Studies doesn’t enroll anyone.

Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 18–65 · All sexes
Healthy volunteers
Accepted
Study type
Interventional · Phase 1
Target enrollment
150
US sites recruiting
2
Study start
February 25, 2026
Record last updated
October 5, 2026

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

The goal of this study is to understand the role of glucagon signal on glucose metabolism in individuals with and without bariatric surgery. The study is involved with measuring glucose metabolism with glucagon infusion and glucagon receptor blockade. We use an investigational drug called REMD 477. "Investigational" means that the has not yet been approved by the U.S. Food \& Drug Administration (FDA). REMD-477 is a monoclonal antibody (an antibody made by cloning a unique white blood cell) that blocks the effect of glucagon.

Being studied: REMD-477 versus Placebo; Exogenous glucagon versus saline infusion

Conditions: Non-Diabetic

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria

Inclusion Criteria

  • Provision of signed and dated informed consent form from participant.
  • Male or female, ≤65 and ≥18 years old
  • Subjects with history of gastric bypass surgery and sleeve gastrectomy more than a year since surgery and non-surgical subjects without history of gastrointestinal (GI) surgery
  • HbA1c ≤6%
  • Willing to adhere to the study intervention regimen
  • Female subjects of childbearing potential must have a negative pregnancy test at screening and all the study visits, and must not be lactating
  • Females of childbearing potential who are sexually active with a nonsterilized male partner must use at least one highly effective method of contraception from screening and must agree to continue using such precautions during the study.It is strongly recommended for the male partner of a female subject to also use male condom plus spermicide throughout this period. Cessation of contraception after this point should be discussed with a responsible physician. Periodic abstinence, the rhythm method, and the withdrawal method are not acceptable methods of contraception.

Exclusion Criteria

  • Diabetes
  • Pregnancy/lactation
  • Hgb \<11
  • Current GI obstruction or chronic diarrhea
  • Subjects who are not within the age range of 18- 65 years.
  • Evidence of active cardiorespiratory, hepatic, gastrointestinal or renal disease.
  • History of allergy to the administered drugs.
  • History of, or any existing condition that, in the opinion of the investigator, would interfere with evaluation of the investigational product, put the subject at risk, influence the subject's ability to participate or affect the interpretation of the results of the study and/or any subject unable or unwilling to follow study procedures.
  • Substance dependence or history of alcohol abuse and/or excess alcohol intake
  • Patients on ketogenic diet
  • Prisoners or institutionalized individuals
  • AST (SGOT) > 3 times upper limit of normal
  • ALT (SGPT) > 3 times upper limit of normal
  • History of clinical hypoglycemia documents based on Whipples' triad (ONLY for Aim 2)

Recruiting US locations

  • Texas Diabetes Institute - University Health System

    San Antonio, TX 78207

    Site contact: Mooney A Mark-Johnson, RN

  • University of Texas San Antonio

    San Antonio, TX 78229

    Site contact: Mooney Mark-Johnson, BSN · 210 450 8696 · markjohnson@uthscsa.edu

Study contacts (from the official record)

  • Marzieh Salehi, MD, MS · 210-450-8560 · salehi@uthscsa.edu
  • Andrea Hansis-Diarte, MPh · 210-567-3208 · hansisdiarte@uthscsa.edu
All diabetes studies in Texas →
The Role of Glucagon in Glucose Metabolism in Humans With and… (NCT07212868) | Bored Studies