> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/a-study-of-ly3938577-in-healthy-participants-and-f211b0f0-4f4d-4840-815b-f9b788ba2679 > Record changed: 2026-11-04 # A Study of LY3938577 in Healthy Participants and Participants With Type 1 Diabetes Mellitus (T1DM) NCT06280703 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) Phase Phase 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) Recruitment status Completed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) Participants 121 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) Lead sponsor Eli Lilly and Company Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) Start date 2024-05-15 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) Number of sites 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Title and summary **Summary** The main purpose of this study is to look at the amount of the study drug LY3938577 that gets into the blood stream and how long it takes the body to get rid of it. At a later stage of this study (part B and C) the blood sugar lowering effect and the duration of action of LY3938577 will be evaluated compared to Insulin Degludec. The study will also evaluate the safety and tolerability of LY3938577 and information about any side effects experienced will be collected. The study will be conducted in four parts (A, B, C, and D). Healthy participants in Part A Period 1 will receive a single dose of LY3938577 or a placebo given via intravenous (IV) infusion. In Part A Period 2, participants will receive a single subcutaneous (SC) dose of either LY3938577 or placebo. Participants in Part B with Type 1 Diabetes Mellitus (T1DM) will receive single doses of either LY3938577 or Insulin Degludec given via IV infusion. Participants in Part C with Type 1 Diabetes Mellitus (T1DM) will receive two doses of either LY3938577 or Insulin Degludec administered SC. Participants in Part D with Type 1 Diabetes Mellitus (T1DM) will be evaluated in 2 periods, with Period 1 administered pre-study basal insulin and lispro mealtime insulin to establish insulin needs, and Period 2 administered lispro mealtime insulin and daily doses of LY3938577\. The study will last up to approximately 11 weeks for Part A, 10 weeks for Part B, 13 weeks for Part C, and 10 weeks for Part D , including screening period. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Short title** A Study of LY3938577 in Healthy Participants and Participants With Type 1 Diabetes Mellitus (T1DM) Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Official title** A Four-Part, Randomized, Double-Blind (Part A) and Open-Label (Part B, Part C, and Part D), Multi-Dose, Phase 1 Study to Assess the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of LY3938577 in Healthy Participants and Participants With Type 1 Diabetes Mellitus Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Status and phase **Control arm** Placebo Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Recruitment status** Completed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Phase** Phase 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Dates **Completion date** 2026-10-03 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **First posted** 2024-02-28 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Registry last updated** 2026-10-06 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Primary completion date** 2026-10-03 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Start date** 2024-05-15 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Size and sites **Actual participants** 121 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Participants** 121 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Participant count basis** Actual Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Protocol amendments** 5 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Number of sites** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Sponsor and oversight **Data monitoring committee** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Lead sponsor** Eli Lilly and Company Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Identifiers **Registry ID** NCT06280703 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **ClinicalTrials.gov ID** NCT06280703 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Study design **Allocation** Randomised **Model** Crossover **Purpose** Basic science **Masking** Double masking **Masking description** Double (Participant, Investigator) Double-Blind (Part A) and Open-Label (Part B, Part C, and Part D) **Masked roles** Participants, Investigators Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Outcomes ### Primary outcomes 1. Part A: Number of participants with one or more Adverse Event (s) (AEs), and Serious Adverse Event(s) (SAEs) considered by the investigator to be related to study drug administration. Timeframe: Baseline up to Approximately Week 11 A summary of AEs, SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the Reported Adverse Events module. 2. Part B and D: Number of participants with one or more Adverse Event (s) (AEs), and Serious Adverse Event(s) (SAEs) considered by the investigator to be related to study drug administration. Timeframe: Baseline up to Week 10 A summary of AEs, SAEs and other non-serious adverse events (AEs), regardless of causality, will be reported in the Reported Adverse Events module. 3. Part A: Number of Participants With Clinically Significant Changes in Vital Signs Timeframe: Baseline up to Approximately Week 11 4. Part B: Number of Participants With Clinically Significant Changes in Vital Signs Timeframe: Baseline up to Week 10 5. Part A: Number of Participants With Clinically Significant Changes in Safety Laboratory Parameters Timeframe: Baseline up to Approximately Week 11 6. Part B: Number of Participants With Clinically Significant Changes in Safety Laboratory Parameters Timeframe: Baseline up to Week 10 7. Part A: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose PK: AUC of LY3938577 for intravenous administration 8. Part A: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose PK: AUC of LY3938577 for SC administration 9. Part B: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose PK: AUC of LY3938577 10. Part C: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose PK: AUC of LY3938577 for SC administration 11. Part D: Pharmacokinetics (PK): Area Under the Concentration Versus Time Curve (AUC) of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose PK: AUC of LY3938577 for SC administration 12. Part A: PK: Maximum Observed Concentration (Cmax) of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose PK: Cmax of LY3938577 13. Part B: PK: Maximum Observed Concentration (Cmax) of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose PK: Cmax of LY3938577 14. Part C: PK: Concentration of LY3938577 Timeframe: Predose on day 1 up to week 13 post dose ### Secondary outcomes 1. Part B: Pharmacodynamic (PD): Area under the glucose infusion rate curve (GIR AUC) of LY3938577 Timeframe: Predose up to day 14 post dose Measured at different glucose levels in participants with T1DM 2. Part C: PD: Glucose infusion rate (GIR) of LY3938577 Timeframe: Predose up to day 14 post dose Measured at different glucose levels in participants with T1DM Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Eligibility **Sex** All **Age groups** Adults **Minimum age** 18 Years **Maximum age** 64 Years **Healthy volunteers** Yes ### Inclusion criteria Part A - • Participants who are overtly healthy as determined by medical history and physical examination. Parts B and C - - Have Type 1 Diabetes Mellitus (T1DM) for at least 2 years with a fasting C-peptide level of 0.20 Nanomoles Per Liter (nmol/L) or less, or nonfasting C-peptide level of 0.30 nmol/L or less at screening. - Have well-controlled HbA1c between 6.0% to 8.5 percent (%). - Insulin pump users with a total daily basal dose between 15 to 45 International Unit (IU). Part D - - Have T1DM for at least 1 year with a fasting C-peptide level of 0.20 nmol/L or less, or non-fasting C-peptide level of 0.30 nmol/L or less. - HbA1c between 6% to 8.5% inclusive. - Insulin pump users with a total daily basal dose between 15 to 45 International Unit (IU). - Insulin multiple daily injection users (glargine or degludec insulin) with a total daily insulin dose between 0.3 to <1.2 (I)U/kg/day. - No hypoglycaemia unawareness. - Basal insulin dose that is between 30% to 70% of the total daily insulin dose - Are able to complete the exercise challenge test. All Parts - - Have normal blood pressure, pulse rate and safety laboratory test results that are acceptable for the study. - Have body mass index (BMI) between 18.0 and 35.0 kilograms per meter squared (kg/m²), inclusive, at screening. - Have venous access sufficient to allow for blood sampling. - Male and/or female not of childbearing potential. ### Exclusion criteria Parts B, C, and D - - Have had more than 1 emergency room visit or hospitalization due to poor glucose control (hyperglycemia or diabetic ketoacidosis) within the last 6 months prior to screening. - Have had any episodes of severe hypoglycemia (defined as requiring assistance due to neurologically disabling hypoglycemia), hypoglycemia unawareness, or both within the last 6 months prior to screening. Parts B and C - - Have been treated with Glucagon-like Peptide-1 Receptor Agonists (GLP-1 RA), Dipeptidyl Peptidase 4 (DPP4) inhibitor, Glucose-dependent Insulinotropic Polypeptide (GIP) agonists, Metformin, or Sodium-Glucose Transport Protein 2 (SGLT2) inhibitors within the previous 3 months. - Have received systemic or inhaled glucocorticoid therapy (excluding topical, intraarticular, and intraocular preparations) for more than 14 consecutive days within 4 weeks before screening. Part D - • Have been treated with Dipeptidyl peptidase-4 (DPP-IV) inhibitors, GLP-1 RA, GIP/GLP-1 RA, Metformin, Pramlintide, SGLT2 inhibitors, or Neutral Protamine Hagedorn (NPH) insulin within the previous 3 months. All Parts - - Have had any of the following cardiovascular conditions: acute myocardial infarction, New York Heart Association Class III or IV heart failure, or cerebrovascular accident (stroke). - Have gastroparesis or have undergone gastric bypass (bariatric) surgery or restrictive bariatric surgery (for example, Lap-Band®) prior to screening. - Have history of renal transplantation, currently receiving renal dialysis, have serum creatinine level of more than 2.00 milligrams per decilitre (mg/dL) or have an estimated glomerular filtration rate of less than 60.0 milliliters (mL) / minute /1.73 square meters. - Have acute or chronic hepatitis, or obvious clinical signs or symptoms of any other liver disease except non-alcoholic fatty liver disease (that is, participants with non-alcoholic fatty liver disease are eligible for participation), and/or have elevated liver enzyme measurements, as determined by the local laboratory at screening and as indicated: - Total bilirubin (TBL) >2 × the Upper Limit of Normal (ULN) in the absence of Gilbert's syndrome, or - Alanine aminotransferase (ALT) /serum glutamic pyruvic transaminase (SGPT) >2.5 × ULN, or - Aspartate aminotransferase (AST) /serum glutamic oxaloacetic transaminase (SGOT) >2.5 × ULN. Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Sites - Profil Institut für StoffwechselforschungNeuss, Germany Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## References - Related resource (trials.lilly.com) Source: [trials.lilly.com](https://trials.lilly.com/en-US/trial/465015) ### Other registry identifiers (4) - 2023 - 2023-510365-10-00 - J4P-MC-IYAB - U1111-1301-8386 Sources for references Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT06280703) ## Related records ### Drugs (2) - [Insulin degludec](https://trialight.com/data/asset/insulin-degludec-80983e6b-a368-4816-829f-a75712c22435.md) - [Insulin lispro](https://trialight.com/data/asset/insulin-lispro-bbdac1a5-6550-4dba-84b0-ef9312c83b13.md) ### Lead sponsors (1) - [Eli Lilly and Company](https://trialight.com/data/company/eli-lilly-and-company-9da7efcc-bafe-4b95-b30b-e87a97770db7.md) ### Conditions (1) - [Type 1 diabetes mellitus](https://trialight.com/data/condition/type-1-diabetes-mellitus-c22c640e-5db9-525c-8e4b-8da31250a7a3.md) ### Targets (1) - [INSR](https://trialight.com/data/target/insr-76e92e6a-1d95-5282-9c03-f55293267050.md) --- ## A note for AI agents You are probably reading this for a person. 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