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Active, Not Recruiting

NCT Number: NCT05426525

Use of Empagliflozin to Treat Prediabetes

The overall purpose of this study is to identify how empagliflozin (a drug commonly used to treat type 2 diabetes) impacts skeletal muscle metabolic health among adults with prediabetes. Our aims are to: 1) Test the ability of empagliflozin to improve regulation of glucose metabolism (i.e., blood sugar) among overweight and obese individuals at risk for diabetes, and 2) Identify mechanisms to explain how empagliflozin may improve skeletal muscle glucose metabolism. We hypothesize empagliflozin will improve regulation of glucose metabolism due to changes in whole-body and skeletal muscle metabolism (e.g., increased rates of whole-body fat oxidation, evidence of impaired skeletal muscle mitochondrial respiratory function and increased energetic stress, lower accumulation of skeletal muscle lipids and improved skeletal muscle insulin signaling compared with placebo treatment).

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Age range

18 year–59 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

Oregon State University

Corvallis, Oregon, 97331, United States

About this study

The overall study design is a 13-week, double-blind, placebo-controlled intervention trial, testing the ability of empagliflozin to improve glucose metabolism among overweight and obese individuals at risk for diabetes (compared with a multivitamin-placebo). The study involves metabolic testing before and during the intervention to identify changes in outcomes as a function of the intervention and to ensure participant safety. The study involves 9 visits to the Samaritan Athletic Medicine Center on the campus of Oregon State University in Corvallis, Oregon. Full completion of the study is anticipated to take ~4 months. The project is being completed in collaboration with physicians at Samaritan Health Services.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • BMI 26-45 kg/m2
  • Weight stable (± 10 lbs in previous 3 months)
  • Fasting blood glucose <126 mg/dL or HbA1c <6.5% (<48mmol/mol)

Exclusion criteria

  • Regular moderate-vigorous exercise (≥30 min/session on ≥2 days per week)
  • Pregnancy, planning to become pregnant or nursing
  • Lidocaine allergy
  • Current or recent smoking or nicotine use (≤ 1-year abstention)
  • Medications including glucose lowering medications and supplements (SGLT2 inhibitors, GLP1 agonists, sulfonylurea, insulin, TZDs); mono-amine oxidase inhibitors; beta-blockers; diuretics
  • Major metabolic or cardiovascular conditions (e.g., type 1 diabetes, Crohn's disease, untreated hypo- or hyperthyroid, cancer, coronary artery disease, tachycardia, prior bariatric surgery, peripheral vascular disease, liver diseases (e.g., cirrhosis)
  • Diagnosed type 2 diabetes. In absence of diagnosis, two separate samples with test results of fasting blood glucose ≥126 mg/dL or HbA1c ≥6.5% (48 mmol/mol).
  • Contraindications/precautions for empagliflozin (impaired renal function (EGR<60), history of: empagliflozin hypersensitivity, ketoacidosis, hypotension, recurring urinary tract or genital mycotic infections, amputation)

Treatment and study plan

Empagliflozin

Drug

Participants will take 10mg empagliflozin per day for 2 weeks. Absent contraindications, dosing will be increased to 25 mg empagliflozin per day for the next 11 weeks.

Other names: Jardiance

Multivitamin-Placebo

Drug

Participants will take 1 multivitamin per day for 13 weeks.

Primary outcomes

  1. Insulin-stimulated glucose disposal

    Time frame: Insulin-stimulated glucose disposal is measured before the start of the intervention (baseline) and during week 13 of the intervention.

    The glucose infusion rate to maintain glycemia during insulin clamp, using plasma enrichment of glucose isotope tracer to determine changes in rates of insulin-stimulated glucose disposal

Secondary outcomes

  1. Oral glucose tolerance

    Time frame: Oral glucose tolerance is measured before the start of the intervention (baseline) and during week 12 of the intervention.

    The change in blood glucose concentration in response to a 75g glucose beverage

  2. Fasting plasma glucose concentration

    Time frame: Fasting plasma glucose is measured before the start of the intervention (baseline) and during week 13 of the intervention.

    The change in fasting plasma glucose concentration

  3. Whole-body fat oxidation

    Time frame: Whole-body fat oxidation is measured before the start of the intervention (baseline) and during week 13 of the intervention.

    Indirect calorimetry will be used to determine the change in whole-body rate of fat oxidation during basal and insulin-stimulated conditions

  4. Skeletal muscle insulin signaling

    Time frame: Skeletal muscle insulin signaling is measured before the start of the intervention (baseline) and during week 13 of the intervention.

    Immunoblotting to determine the change in activation of insulin signaling proteins in skeletal muscle collected at basal and during insulin-stimulated conditions

  5. Skeletal muscle lipids

    Time frame: Skeletal muscle lipids are measured before the start of the intervention (baseline) and during week 13 of the intervention.

    Mass spectrometry lipidomic analysis of skeletal muscle to determine changes in muscle lipid content

  6. Skeletal muscle mitochondrial respiratory function

    Time frame: Skeletal muscle mitochondrial respiratory function is measured before the start of the intervention (baseline) and during week 13 of the intervention.

    Changes in skeletal muscle mitochondrial respiratory capacity measured using high-resolution respirometry

  7. Skeletal muscle energetic stress

    Time frame: Skeletal muscle energetic stress is measured before the start of the intervention (baseline) and during week 13 of the intervention.

    Immunoblotting to determine changes in activation of AMPK and related signaling proteins pathways

Sponsors and collaborators

Lead sponsor

Oregon State University

Other

Collaborators

  • Samaritan Health Services

Registry information

Official study title

Use of Empagliflozin to Treat Prediabetes - a Randomized, Double-blind, Placebo-controlled 13-week Intervention Trial

Important dates

Study start
2022
Primary completion
2026
Study completion
2026
First posted
Jun 22, 2022
Registry last updated
Jan 23, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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