A Research Study to Evaluate the Safety and Tolerability of SGC001 in Healthy Subjects

Prior treatment

• Individuals with known allergy to therapeutic protein drugs or food or who may be allergic to the test drug or any component of the investigational drug, based on the investigator's judgment.
• Individuals with a history of drug abuse within the past 5 years, the presence of drug abuse within 3 months before the study, or a positive drug abuse screening result.
• Individuals who have smoked within 3 months before screening (consuming ≥ 5 cigarettes per day) or habitual use of nicotine containing products.
• Individuals who have consumed more than 14 units of alcohol per week (1 unit of alcohol = 360 mL of beer or 45 mL of spirits with 40% of alcohol content or 150 mL of wine) within 3 months prior to screening, or who consume alcohol-containing products within 48 hours before dosing, or who have a positive alcohol breath test result at screening and/or D-1.
• Individuals who have received monoclonal antibody or biologic therapy within 3 months prior to receiving the investigational drug.
• Individuals who have received medications that may affect the immune system (e.g., immunosuppressants, cytokines and cytokine inducers,) within 3 months prior to receiving the investigational drug.
• Individuals who have received anticoagulant or antiplatelet medications within 28 days prior to receiving the investigational drug.
• Individuals who have received any vaccine within 28 days prior to receiving the investigational drug, or who plan to receive a vaccine during the trial period.
• Individuals who have suffered from clinically significant major diseases or undergone major surgical procedures within 28 days prior to receiving the investigational drug, or who anticipate requiring major surgery during the trial period.
• Individuals who have used any prescription drugs, over-the-counter drugs, Chinese herbal medicines, or health supplements within 14 days prior to receiving the investigational drug or within the 5 half-lives of the drug (whichever is longer).
• Individuals who have participated in other drug clinical studies and received other clinical trial drugs within 3 months prior to receiving the investigational drug.
• Individuals who have history of blood donation or massive blood loss (≥ 400 mL) within 3 months prior to screening.

Other illness

• Individuals with a history of cardiovascular disease.
• Individuals with a history of acute or chronic bronchospasm, including treated or untreated asthma, and chronic obstructive pulmonary disease (COPD).
• Individuals with a history of autoimmune disease.
• Individuals with a history of malignant tumors.
• Individuals whose screening viral serology tests are positive for human immunodeficiency virus antigen/antibodies (HIV-Ag/Ab), hepatitis B surface antigen (HBsAg), hepatitis C virus antibodies (HCV-Ab), or antibodies to Treponema pallidum (TP-Ab).
• Individuals who have difficulty in venous blood collection or have a history of needle and blood fainting.

Lab values

• Individuals with clinically significant abnormalities on physical examination, vital signs examination, electrocardiogram or laboratory tests, as judged by the clinician.

Other

• Women who have positive result in pregnancy test or are breastfeeding at Screening or D-1.
• Any other circumstance that, in the judgement of the investigator, may affect the ability of the subject to provide informed consent or to follow the trial protocol, or where the subject's participation in the trial may affect the outcome of the trial or his/her safety.

• Subjects who fully understand the purpose, nature, method, and potential adverse reactions of the trial, and who voluntarily sign the informed consent form and agree to participate in the study.
• Healthy male or female subjects aged 18 \~ 50 years (both inclusive, based on the time of signing the informed consent form).
• Body mass index (BMI): 19.0 \~ 26.0 kg/m2 (both inclusive), body weight of male subjects ≥50.0 kg, and body weight of female subjects ≥45.0 kg.
• Female subjects of childbearing potential must agree to use effective contraception from screening until 3 months after receiving the investigational drug. In addition, they must agree to refrain from collecting or donating eggs during this period; their male partner of childbearing potential must also agree to use effective contraception during this period.
• Male subjects of childbearing potential must agree to use effective contraception and have no plans to conceive or donate sperm from screening until 3 months after receiving the investigational drug. During this period, their female partner of childbearing potential must also agree to use effective contraception.