Clinical trial NCT06229678: Ketones, SGLT2, HFrEF
Official title: Ketones, Muscle Metabolism, and SGLT2 Inhibitors
Study type: INTERVENTIONAL
Overall status: SUSPENDED
Phase: EARLY_PHASE1
Conditions: Type2diabetes
Heart Failure With Reduced Ejection Fraction
Keywords: ketones
cardiovascular benefit
Lead sponsor: The University of Texas Health Science Center at San Antonio
Sponsor class: OTHER
Collaborators: name: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
First posted: 2024-01-29
Enrollment: 71
Sex: ALL
Minimum age (years): 18
Maximum age (years): 70
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Intervention model description: A randomized (2:1) placebo controlled double blind study
Primary purpose: BASIC_SCIENCE

Brief summary: The study team will examine the effects of elevated plasma ketone levels following initiation of SGLT2 inhibitor therapy in high-risk type 2 diabetes mellitus (T2DM) individuals with heart failure (HF) with reduced ejection fraction (HFrEF) providing an energy-rich fuel that is taken up with great avidity by the myocardium, to measure change in Left Ventricle diastolic and systolic function

Detailed description: The study team will examine the effects of elevated plasma ketones caused by 12-week treatment with an SGLT2i (empagliflozin) treatment in participants with T2DM and HF. The study team will focus on three possible mechanisms of action for these effects and test the following:

(i) Skeletal muscle bioenergetics. Using 31P-MRS, the team will quantify phosphocreatine \[PCr\], ATP, inorganic phosphate, phosphodiester, and intracellular pH. With 1H-MRS, and will measure intramyocellular lipid content at rest and ATPmax production after exercise. The team will examine the relationships between phosphorous metabolite concentrations, intramyocellular lipid content, and ATP generation before and after 12 weeks of SGLT2 inhibition.

(ii) LV systolic and diastolic function using cardiac MRI in type 2 diabetic patients with Class II-III NYHA heart failure and reduced EF.

(iii) To examine the contribution of the SGLT2i-induced increase in plasma ketone concentration on myocardial function and myocardial blood flow by inhibiting the rise in plasma ketone concentration with acipimox while continuing empagliflozin.

(iv) Improvements in Patient-Reported Outcomes (PRO). Kansas City Cardiomyopathy Questionnaire ( KCCQ) scoring will be used to evaluate self-reported physical function and well-being. This tool is a well-developed and validated method to obtain patient self-reported parameters of health in adults.

Eligibility criteria: Inclusion Criteria:

* Type 2 Diabetes Mellitus
* Class II-III New York Heart Association (NYHA) heart failure and reduced ejection fraction (EF) \<50%
* Age 18-80 years
* BMI 23-44 kg/m2
* Glycated hemoglobin (HbA1c) 6.0-10.0%
* Blood Pressure (BP) ≤ 145/85 mmHg
* Estimated glomerular filtration rate (eGFR) ≥30 ml/min•1.73 m2
* Only Type 2 diabetics treated with diet/exercise, metformin, sulfonylureas, metformin/sulfonylurea, Glucagon-like peptide-1 receptor agonist (GLP-1 RA), or insulin
* Stable body weight (±4 pounds) over the previous 3 months prior to enrollment
* Ability to understand study procedures and to comply with them for the entire length of the study.

Exclusion Criteria:

* Heart failure due to restrictive cardiomyopathy, active myocarditis, constrictive pericarditis, severe valvular heart disease, hypertrophic obstructive cardiomyopathy.
* Significant change in diuretic management during the month prior to screening (defined by doubling of diuretic dose or addition of another heart failure medication)
* Type 2 Diabetics treated with Dipeptidyl Peptidase-4 Inhibitor (DPP4i) or pioglitazone
* Pregnancy, lactation, or plans to become pregnant. A negative pregnancy test will be performed before each MRI study to assess current status. For women of child-bearing age (WOCBA) willingness to use contraception, if applicable.
* Allergy/sensitivity to study drugs or their ingredients.
* Cancer.
* Current drug or alcohol use or dependence that, in the opinion of the site investigator, would interfere with adherence to study requirements.
* Inability or unwillingness of individual or legal guardian/representative to give written informed consent.

Primary outcomes:
measure: Change in Phosphocreatine
timeFrame: Baseline to 3 months
measure: Change in Adenosine Triphosphate (ATP)
timeFrame: Baseline to 3 months
measure: Change in Inorganic Phosphate
timeFrame: Baseline to 3 months
measure: Change in Phosphodiester
timeFrame: Baseline to 3 months
measure: ATPmax production
timeFrame: Baseline to 3 months
Secondary outcomes:
measure: Plasma Beta-hydroxybutyrate (β-OH-B)
timeFrame: baseline to 3 months
measure: Acetoacetate concentrations
timeFrame: baseline to 3 months
measure: 6-min walking test
timeFrame: baseline to 3 months
measure: Patient-Reported Outcomes Measure Information System
timeFrame: baseline to 3 months
measure: plasma ketone concentration on myocardial function
timeFrame: Baseline to 3months + 8 days
measure: plasma ketone concentration on myocardial blood flow
timeFrame: Baseline to 3months + 8 days
Other outcomes:
Locations:
city: San Antonio
country: United States
facility: Texas Diabetes Institute - University Health System
state: Texas
Study officials:
affiliation: University of Texas Health Science Center San Antonio
name: Ralph DeFronzo, MD
role: PRINCIPAL_INVESTIGATOR
References: