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RecruitingPhase 1

Phase 1/1b Study of TLC-6740 in Healthy Subjects and Subjects With Obesity, With or Without Diabetes

A Phase 1/1b Study of Single and Multiple Ascending Doses of TLC 6740 in Healthy Subjects, Including Evaluation of Food Effect and Potential Drug-Drug Interactions, and Preliminary Safety and Efficacy in Subjects With Obesity, With or Without Diabetes

Lead sponsor

OrsoBio, Inc

Asset

Tirzepatide

Subcutaneous · GLP-1 / GIP dual

Listed sites

4

Recruiting sites

4

Enrollment

564

estimated

Study population

Healthy volunteers, Obesity / overweight

Key I/E criteria

BMI 19-35eGFR ≥80Healthy volunteers

Primary endpoints

Treatment-emergent AEs (any)PK of TLC-6740 AUCPK of TLC-6740 Cmax

Footprint

Where this trial recruits

Site locations as reported to ClinicalTrials.gov. Site count is not enrollment count; per-site enrollment is not available from source.

Identifiers

Registered as

NCT IDNCT05822544
Org study ID6740-CL-101

Timeline

Milestones

Study first posted2023-04-20actual
Study start2023-04-22actual
Last update posted2025-12-18actual
Primary completion2026-02estimated (month precision)
Study completion2026-06estimated (month precision)

Assets

Investigational agents

Study populations

Who this study enrolls

Healthy volunteersObesity / overweight

Eligibility

Who can enroll

Minimum age18 Years
Maximum age70 Years
SexAll
Healthy volunteersAccepted

Inclusion criteria

Non-smoking, healthy male or female subject between 18 and 55 years of age, inclusive (Parts A-E); male or female subject between 18 and 70 years of age, inclusive (Parts F, G)
Body mass index (BMI) from 19 to 35 kg/m2, inclusive (Parts A-E); BMI ≥ 30 kg/m2 and ≤ 50 kg/m2 (Parts F, G)
Estimated glomerular filtration rate (eGFR) ≥ 80 mL/min (Parts A-E); eGFR ≥ 60 mL/min/1.73m2 or eGFR ≥ 45 mL/min/1.73m2, depending on cohort (Parts F, G)
ALT/AST/ALP ≤ 1 x ULN (Parts A-E); ALT/AST < 3 x ULN, ALP < 1.5 x ULN (Parts F, G)
Screening laboratory evaluations (hematology, chemistry, and urinalysis) must fall within the normal range of the local laboratory's reference ranges unless the results have been determined by the investigator to have no clinical significance (Parts A-E)
Subject must have either a normal 12-lead electrocardiogram (ECG) or one with abnormalities that are considered clinically insignificant by the investigator
Females of childbearing potential must have a negative pregnancy test at Screening and clinic admission
Male subjects and female subjects of childbearing potential who engage in heterosexual intercourse must agree to use protocol-specified method(s) of contraception
Must, in the opinion of the investigator, be in good health based upon medical history and physical examination, including vital signs

Exclusion criteria

Pregnant or lactating subjects
Unstable type 2 diabetes (as defined as: HbA1c > 10.0%; treatment with insulin and/or pioglitazone within 90 days prior to Screening; any history of diabetic ketoacidosis, hyperosmolar state, and/or acutely decompensated blood glucose control; hypoglycemia unawareness, hospitalization due to hypoglycemia, or history of severe hypoglycemia [requiring outside assistance to regain normal neurologic status]) (Part F)
History of type 2 diabetes diagnosed prior
Medical history of type 1 diabetes or latent autoimmune diabetes of adults (LADA)
Obesity induced by other endocrinologic disorders (e.g., Cushing syndrome) or diagnosed monogenetic or syndromic forms of obesity (e.g., melanocortin 4 receptor deficiency or Prader-Willi syndrome)
Known serious hypersensitivity to tirzepatide or any of the excipients in tirzepatide (Part G)
Subjects who have any serious or active medical or psychiatric illness (including depression) that, in the opinion of the investigator, would interfere with the subject's treatment, assessment, or compliance with the protocol
Subjects who have received any investigational compound within 30 days or 5 half-lives, whichever is longer, prior to study drug dosing
Current alcohol abuse that is judged by the investigator to potentially interfere with the subject's compliance or safety
Current substance abuse that is judged by the investigator to potentially interfere with the subject's compliance or safety
A positive test result for human immunodeficiency virus (HIV-1) antibody, hepatitis B (HBV) surface antigen, or hepatitis C (HCV) antibody
Medical history of drug sensitivity or drug allergy (such as anaphylaxis or hepatoxicity)
Presence or history of cardiovascular disease, including significant cardiovascular disease (including a history of myocardial infarction based on ECG and/or clinical history), history of cardiac conduction abnormalities (including any history of ventricular tachycardia), congestive heart failure, cardiomyopathy with left ventricular ejection fraction < 40%, a family history of Long QT Syndrome, or unexplained death in an otherwise healthy individual between the ages of 1 and 30 years
Syncope, palpitations, or unexplained dizziness
Implanted defibrillator or pacemaker
Medical history of liver disease, including but not limited to alcoholic liver disease, autoimmune disorders (e.g., primary biliary cholangitis, primary sclerosing cholangitis, autoimmune hepatitis), drug-induced hepatotoxicity, Wilson disease, clinically significant iron overload, or alpha-1-antitrypsin deficiency)
Severe peptic ulcer disease, gastroesophageal reflux disease, or other gastric acid hypersecretory conditions
History of medical or surgical treatment that permanently alters intestinal absorption (e.g., gastric or intestinal surgery)
Subjects who have received vaccination for COVID-19 within 14 days of Admission

Note: Other protocol defined Inclusion/Exclusion criteria may apply.

Endpoints (6)

What's being measured

Protocol endpoints and posted registry outcome measures, grouped into outcome categories. Composite endpoints show their component event types. Standard codes (LOINC, SNOMED CT) are shown where available.

Safety / tolerability / PK

6 endpoints
Primary/protocol endpoint

Incidence of TLC-6740 treatment-emergent adverse events

Time frame:Through study completion: up to Day 15 (Parts A, C); Day 24 (Parts B, C); Day 22 (Part D); Day 49 (Part E); Day 168 (Parts F, G) of the study

Treatment-emergent AEs (any)

event count, event

Primary/protocol endpoint

PK of TLC-6740 AUC

Time frame:Through study completion: up to Day 15 (Parts A, C); Day 24 (Parts B, C); Day 22 (Part D); Day 49 (Part E); Day 168 (Parts F, G) of the study

AUC₀–∞

concentration, descriptive

Primary/protocol endpoint

PK of TLC-6740 Cmax

Time frame:Through study completion: up to Day 15 (Parts A, C); Day 24 (Parts B, C); Day 22 (Part D); Day 49 (Part E); Day 168 (Parts F, G) of the study

Cmax

concentration, descriptive

Primary/protocol endpoint

PK of TLC-6740 tmax

Time frame:Through study completion: up to Day 15 (Parts A, C); Day 24 (Parts B, C); Day 22 (Part D); Day 49 (Part E); Day 168 (Parts F, G) of the study

Tmax

descriptive

Primary/protocol endpoint

PK of TLC-6740 t1/2

Time frame:Through study completion: up to Day 15 (Parts A, C); Day 24 (Parts B, C); Day 22 (Part D); Day 49 (Part E); Day 168 (Parts F, G) of the study

Half-life

descriptive

Primary/protocol endpoint

PK of TLC-6740 CL/F

Time frame:Through study completion: up to Day 15 (Parts A, C); Day 24 (Parts B, C); Day 22 (Part D); Day 49 (Part E); Day 168 (Parts F, G) of the study

AUC₀–∞

descriptive

Provenance

Sources

Trial identity, design, statusClinicalTrials.gov API v2
Snapshot dateJuly 1, 2026
Endpoint classificationDelfa endpoint taxonomy v2 (May 13, 2026)
Results tableno registry results posted yet

Trial facts come from public ClinicalTrials.gov records. Endpoint categories are Delfa's classification of those records, not a ClinicalTrials.gov field. All figures reflect the July 1, 2026 snapshot.