A Randomized, Double-Blind, Placebo-Controlled, Dose-Escalating Phase I Clinical Study to Evaluate the Safety, Tolerability, Pharmacodynamics, Pharmacokinetics, and Immunogenicity of HLX71 in Healthy Adult Subjects
A randomized, double-blind, single-dose by intravenous administration, placebo-controlled,
dose escalation, first-in-human study is proposed to evaluate the safety, tolerability,
pharmacodynamics, pharmacokinetics and immunogenicity of HLX71 in healthy subjects.
Investigators plan to enroll 10 subjects in each of the 4 dose cohorts at 2.5 mg/kg, 5 mg/
kg, 10 mg/kg and 15 mg/kg, of which 2 receive intravenous injections of placebo and 8 receive
intravenous injections of the investigational product (IP). A total of 40 subjects will be
enrolled.
Drug: HLX71
Single-dose, intravenous infusion
Other Name: Recombinant Human Angiotensin-Converting Enzyme 2-Fc Fusion Protein
Other: Placebo
Single-dose, intravenous infusion
Inclusion Criteria:
- Subjects with voluntary signing of the informed consent form (ICF), and capable of
understanding and following the requirements.
- Healthy males or females aged ≥ 18 and < 65 years at the time of signing the ICF.
- Body weight ≥ 50.0 kg and < 100.0 kg, and body mass index (BMI) ≥ 18.5 kg/m2 and <
30.0 kg/m2.
- The subject is in good health as determined by the Investigator according to medical
history, physical examination, vital signs, 12-lead ECG, chest X-ray, and laboratory
tests (hematology, serum chemistry, C-reactive protein, thyroid function, coagulation,
etiology, urinalysis).
- No plan of pregnancy and being willing to use continuous effective contraception for
subjects (including partner) from informed consent to 6 months after administration of
investigational product, see Appendix 1 for the specific contraceptive measures.
Exclusion Criteria:
- Subjects with the lab-confirmed medical history of COVID-19, including SARS-CoV-2
determined by reverse transcription-polymerase chain reaction (RT-PCR) or positive
specific antibody IgM or IgG against serum SARS-CoV-2.
- Subjects with the novel onset of pyrexia/cough/shortness of breath/diarrhea or history
of contact with confirmed COVID-19 individuals within the 14 days before
randomization.
- Pneumonia or active tuberculosis (TB) indicated by chest X-Ray, or abnormal and
clinically significant as judged by the Investigator.
- Abnormal blood pressure or pulse rate: systolic blood pressure (SBP) ≥ 140 mmHg or
diastolic blood pressure (DBP) ≥ 90 mmHg, SBP ≤ 90 mmHg or DBP < 60 mmHg, pulse rate <
50 beats /min or > 100 beats/min at screening and clinically significant as judged by
the Investigator.
- Clinically significant 12-lead ECG abnormalities, or QTcF interval > 450 msec at
screening, or history of clinically significant ECG abnormalities, which may increase
the risk to the subject as judged by the Investigator.
- Use of monoclonal antibodies or fusion proteins within 6 months before screening.
- Subjects with previous exposure to vaccines in 3 months before screening, or who plans
to receive vaccination during the study period or in 3 months after the study.
- History of allergy to any monoclonal antibody, fusion protein, biological product,
protein product, or ingredient of the IP.
- Family history of cardiovascular disease, history of atherosclerosis, presence of
chronic obstructive pulmonary disease (COPD), cirrhosis, cardiovascular disease, or
any condition that requires active medical intervention or monitoring to avert serious
danger to the participant's health or well-being.
- History of blood loss or blood donation (including blood component donation) ≥ 400 mL,
or reception of blood transfusion within 3 months prior to screening; blood loss or
donation (including blood component donation) ≥ 200 mL within 1 month prior to
screening.
- Previous surgery within 2 months before screening, or scheduled surgery during the
study.
- Previous administration of any investigational drugs/comparators in clinical trials
within 3 0 days or remaining in the elimination period of the drug (within 5
half-lives) before screening, or still in the follow-up period of a certain clinical
study.
- Use of prescribed drugs, over-the-counter (OTC) drugs, or herbal medicines (excluding
vitamins and mineral supplements) within 14 days before screening.
- History of alcohol abuse or intake of excessive alcohol in the past 6 months (15 unit
of alcohol per week: 1 unit = 285 mL beer, or 25 mL liquor, or 100 mL wine), or
alcohol breath test positive, or unwilling/unable to quit alcohol drinking during the
study.
- Subjects who smoke ≥ 5 cigarettes per day or are positive in tobacco screening , or
those who are unwilling/unable to quit nicotine intake during the study.
- Positive for hepatitis B surface antigen (HbsAg), hepatitis C virus antibody
(anti-HCV), human immunodeficiency virus antibody (anti-HIV) antibody, treponema
pallidumparticle agglutination test (TPPA) or Tuberculosis (TB) quantiferon at
screening.
- Positive β-Human Chorionic Gonadotropin (β-HCG) or breastfeeding female subjects.
- History of narcotics abuse or addiction, or positive drug screening.
- Other conditions unsuitable for participation in the study determined by the
Investigator, such as potential compliance issues, inability to complete all tests and
evaluations required in the protocol, and uncontrolled psychiatric or mental
illnesses.
Frontage Clinical Services, Inc.
Secaucus, New Jersey, United States
Frank Lee, MD, Principal Investigator
Frontage Clinical Services, Inc.