A Phase I Study of the Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Single Subcutaneous UBT38006 Injection in Healthy Adult Males

This study is a single-center, randomized, double-blind, placebo- and active-controlled, parallel-group, single-ascending dose (SAD) design. Insulin degludec and insulin icodec injection serves as the active control and is administered in an open-label manner. The study will be conducted across 6 cohorts, comprising 4 dose-escalation cohorts of UBT38006 (1, 3, 6, and 12 nmol/kg) ， 1 active control cohort of insulin degludec (0.4 U/kg \[2.4 nmol/kg\]) and 1 active control cohort of insulin icodec (1.25 U/kg \[7.5 nmol/kg\]). The safety and tolerability (including local tolerability) as well as the pharmacokinetic (PK) and pharmacodynamic (PD) profiles of single subcutaneous doses of UBT38006 injection will be evaluated in healthy adult male participants. In Cohort 1 (1 nmol/kg), participants will be randomized in a 4:1 ratio to receive UBT38006 injection or placebo. In Cohorts 2-4 (3, 6, and 12 nmol/kg), participants will be randomized in an 8:2 ratio to receive the corresponding dose of UBT38006 injection or placebo. Participants in Cohort 5 (insulin degludec active control) will receive 0.4 U/kg (2.4 nmol/kg) insulin degludec injection. Participants in the insulin icodec cohort received a subcutaneous injection of insulin icodec at a dose of 1.25 U/kg(7.5 nmol/kg). Cohorts 1-4 will follow a double-blind design, while Cohort 5 and insulin icodec cohort will be open-label.

Inclusion Criteria: * Aged 18-45 years (inclusive) at the time of informed consent form (ICF) signing; * Sex: Male; * Body weight ≥50.0 kg and body mass index (BMI) between 19.0-24.0 kg/m² (BMI = weight \[kg\] / height² \[m²\]), inclusive, at Screening; * Fasting plasma glucose (FPG) between 3.9-6.1 mmol/L (exclusive of boundary values) at Screening; 2-hour plasma glucose \