A clinical study to evaluate the tolerability, PK and PD characteristics of BDB-001 Injection in healthy subjects.

Inclusion Criteria:

• Male or female subjects between 18~55 years old (including 18 and 55 years old);
• A healthy subject evaluated by medical history etc;
• Physical examination and vital signs normal, or abnormal without clinical significance;
• Weight: 80 kg ≥ male ≥50 kg, and 80 kg ≥ female ≥45 kg. Body Mass Index (BMI) between 18~28kg/m2 (including 18 and 28). Body mass index (BMI) = body weight (kg) / height 2 (m2);
• Be able to complete the study in compliance with protocol;
• The subjects (including sex partners) willing to take effective contraception measures within 6 months after the last dose. Refer to the appendix for the detailed contraceptive methods;
• Informed consent form signed prior to the study and the content, process and possible adverse reactions of the study fully understood.

Exclusion Criteria:

• More than 5 cigarettes were smoked daily within 3 months prior to screening period of the study;
• Allergic history (drugs and food);
• A history of drug abuse and / or drinking (drinking 14 units per week of alcohol: 1 unit = 285 mL beer, or liquor 25 mL, or wine 100ml);
• Subjects who had donated blood or massive blood loss (> 450 mL) within 3 months prior to screening period, or those who had plasma exchange within 4 weeks prior to screening period;
• Any prescription drugs, OTC drugs, any vitamin products or herbs were used within the 14 days prior to screening period, and immunomodulators were used within 28 days prior to screening period;
• Subjects who had taken other investigational product(s) or vaccine within 3 months prior to screening period, or those who were expected to be vaccinated within 2 months after completion of the study;
• Vigorous exercise or other factors affecting drug absorption, distribution, metabolism, excretion within 2 weeks prior to screening;
• Significant change in eating or exercise habits recently;
• Subjects who have taken BDB-001 injection or participated in clinical trials of investigational drugs within three months prior to taking study drugs;
• Subjects with a history of previous tuberculosis and exposure to active tuberculosis, TB-spot test results is greater than 2 UL(upper limit) of normal range, and those with infectious diseases recently;
• Subjects with autoimmune or immunodeficiency diseases, or with a family history of autoimmune diseases or immunodeficiency diseases;
• Abnormal ECG with clinical significance;
• Female subjects are in the lactation period or have positive serum pregnancy results during the period of trial (from screening to completion);
• Clinical laboratory examination result with clinical significance, or other clinical findings within 12 months prior to screening period with clinical significance ( including but not limited to gastrointestinal tract, kidney, liver, nerve, blood, endocrine, tumor, lung, immune, mental or cardiovascular diseases);
• Subjects whose white blood cell count, high-sensitivity C-reactive protein test results were abnormal with clinical significance during screening and baseline period (-1 day), hemoglobin: male <120g/L or female <110g/L;
• Subjects with positive result of viral hepatitis (including hepatitis B and C), AIDS antibody, or treponema pallidum antibody;
• Subjects with acute disease or with concomitant medication from the screening stage to the start time of drug administration;
• Subjects with more than 5 cups (150mL cups) of coffee, tea or cola each day;
• Subjects with any alcohol-containing products within 48 hours before taking study medication;
• Subjects with a positive urine drug screening or with a history of drug abuse or drug use within the past five years;
• The investigators suggested the subject was not suitable to participate in this study.