Dose-escalation and Food Effect Study of ZT006 in Healthy, Overweight and Obese Participants

Inclusion criteria

• Considered to be generally healthy based on the medical history, physical examination, and the results of vital signs, 12-lead electrocardiogram and clinical laboratory tests (hematology, urinalysis, chemistry, coagulation), as judged by the investigator.
• Male or female, age between 18 - 55 years (both inclusive) at the time of signing of the informed consent.
• Body mass index (BMI) 19.0 - 35.0 kg/m²(both inclusive). Body weight >50.0 kg for male participants and >45.0 kg for female participants. BMI 19 - 28.0 kg/m²(both inclusive) for single-dose escalation study, BMI 19.0 - 28.0 kg/m²(both inclusive) for cohorts 1 and 2 of multiple-dose escalation study, BMI 24.0 - 35.0 kg/m²(both inclusive) for cohorts 3 and 4 of multiple-dose escalation study.
• Having dietary caloric restriction and increased physical activity for ≥3 months, with change in body weight (increase or decrease) no more than 5%, irrespective of medical records.

Exclusion criteria

• Known hypersensitivity to the study drug or excipients or GLP-1 receptor agonists.
• Medical history of hypoglycemia.
• History or family history of medullary thyroid carcinoma or multiple endocrine neoplasia type 2, or history of pancreatitis or symptomatic gallbladder disease.
• Previous diagnosis of endocrine disorders or monogenic mutations causing obesity, including but not limited to hypothalamic obesity, pituitary obesity, hypothyroidism-induced obesity, Cushing's syndrome, insulinoma, acromegaly, or hypogonadism.
• Use of GLP-1 receptor agonists within 30 days or 5 half-lives (whichever is longer) before the first dose of the investigational intervention.
• Glycated hemoglobin (HbA1c) > 6.0% or fasting plasma glucose < 3.9 mmol/L or > 6.1 mmol/L at screening, or diagnosed with diabetes mellitus of type 1 or type 2 diabetes or other specific types derived from other causes.
• Aspartate aminotransferase ≥ 2 × upper limit of normal (ULN), Alanine aminotransferase ≥ 2 × ULN, or total bilirubin ≥ 1.5 × ULN
• Calcitonin above ULN at screening.
• Other clinically significant diseases detected within 12 months before screening (including but not limited to gastrointestinal, renal, hepatic, neurological, hematological, endocrine, oncological, pulmonary, immunological, psychiatric, or cardiovascular diseases).
• Use of prescription drugs (excluding topical eye/nose drops and creams without systemic exposure risk), over-the-counter drugs, dietary supplements, vitamins, or herbal medicines (excluding routine vitamins) within 2 weeks before screening.
• Long-term use of medications directly affecting gastrointestinal motility prior to screening. Use of weight-loss medications (including but not limited to orlistat) within 3 months before dosing.