This is a single-center, randomized,double-blind, placebo-controlled Phase I study to evaluate safety, PK and PD of single ascending dose (SAD) of MT1011 injection in healthy adult subjects. Includes 5 dose cohorts, with 40 subjects planned for enrollment.

Inclusion Criteria:

1. Healthy male or female subjects (with at least 1/4 being either female or male), aged 18 to 45 years (inclusive) at screening;
2. Body weight ≥ 50.0 kg for males and ≥ 45.0 kg for females at screening, with a Body Mass Index [BMI = weight (kg) / height² (m²)] within the range of 18.5 to 26.0 kg/m² (inclusive);
3. Subjects must provide informed consent for this study prior to participation and voluntarily sign a written informed consent form;
4. Subjects must be able to maintain good communication with the investigators.

Exclusion Criteria:

1. Subjects with abnormal and clinically significant findings in vital signs, physical examination, laboratory tests (blood routine, urinalysis, blood biochemistry, coagulation function), abdominal ultrasound, or chest X-ray as determined by the investigator;
2. Women who are pregnant or breastfeeding, or female subjects with positive pregnancy tests; Subjects (or their partners) planning pregnancy, or planning to donate sperm/ova during the study or within