A Phase I, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Safety, Tolerabilit… (NCT07345364) | Clinical Trial Compass
Not Yet RecruitingPhase 1
A Phase I, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of Single Ascending Doses of SIM0811 Injection in Healthy Chinese Adult Subjects
China56 participantsStarted 2026-01-13
Plain-language summary
This study plans to set up 5 dose groups across 7 cohorts, including intravenous bolus plus infusion administration as well as intravenous bolus alone. The study plans to enroll 8 subjects per cohort (investigational drug: placebo = 6:2), including both males and females, totaling 56 healthy subjects. The study begins with dose-escalation enrollment starting from Cohort 1. Each cohort receives a single dose, sequentially completing Cohorts 2, 3, 4, 5, 6, and 7. After each cohort's dosing is completed, a 7-day observation period is conducted for safety evaluation. If the termination criteria are not met, the study may proceed to the next dose level following assessment by the Safety Review Committee. By collecting adverse events, as well as abnormal indicators from vital signs, electrocardiograms, and laboratory tests, and collecting blood samples at planned time points to measure SIM0811 plasma concentration and thrombotic molecular markers, the study aims to evaluate the tolerability and safety of SIM0811 injection in Chinese healthy adult subjects, characterize its pharmacokinetic profile after single-dose administration, and explore the change curves of thrombotic molecular markers (plasmin-α2 antiplasmin complex PIC, fibrin degradation products FDP)
Who can participate
Age range18 Years – 45 Years
SexALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
✓. Healthy Chinese male or female adults aged 18 to 45 years (inclusive), not pregnant and not breastfeeding.
✓. Male subjects weight ≥50 kg, female subjects weight ≥45 kg, all ≤90 kg. Body Mass Index (BMI) between 19 and 26 kg/m² (inclusive). BMI = weight (kg) / height² (m²).
✓. Female subjects must avoid the menstrual period during the trial. Subjects of childbearing potential must commit to no plan for pregnancy, sperm/egg donation within 2 weeks before screening and for 6 months after the last dose, and voluntarily adopt highly effective contraception (including partner).
✓. Able to complete the study according to protocol requirements and commit to abstaining from smoking and alcohol during the trial.
✓. Prior to the trial, have fully understood the nature, significance, potential benefits, possible inconveniences, and potential risks of the trial, voluntarily participate, can communicate well with the investigator, comply with all study requirements, and voluntarily sign the Ethics Committee-approved Informed Consent Form.
Exclusion criteria
✕. History of drug allergy, or specific allergies (asthma, urticaria, eczema, etc.), or allergic constitution (e.g., allergy to two or more drugs, foods, pollen), or known allergy or significant intolerance to the investigational product or any of its components.
What they're measuring
1
Adverse events (AEs), including type, incidence, grade (assessed according to NCI-CTCAE V5.0 criteria)
✕. Presence of clinically significant history of cardiovascular, respiratory, endocrine, urinary, digestive, hematological, neurological, skin, malignant tumor, infectious diseases, psychiatric disorders (e.g., seizures), metabolic abnormalities/dysfunction, etc.
✕. Screening physical examination, vital signs, laboratory tests, or other examination results judged by the clinician as abnormal with clinical significance (confirmed upon repeat assessment); OR presence of the following abnormal laboratory indicators: Alanine aminotransferase (ALT), Aspartate aminotransferase (AST), total bilirubin, direct bilirubin, creatinine above the upper limit of normal (ULN); platelet count below the lower limit of normal (LLN); hyperkalemia, hypokalemia, hypercalcemia, or hypocalcemia judged by the investigator as abnormal and clinically significant; PT prolongation \> ULN + 3s, TT prolongation \> ULN + 3s, APTT prolongation \> ULN + 10s, INR \> 1.2, FIB \< 1.5 g/L or \> 4.0 g/L, D-Dimer above ULN.
✕. Screening ECG findings judged as abnormal with clinical significance. Resting heart rate not within the range of 50 to 100 beats per minute (exclusive of boundaries). QTcF interval \> 470 ms (QTcF = QT/(RR)\^0.33) or PR interval outside the range of 120 to 220 ms.
✕. Risk factors for Torsades de Pointes, or family history (first-degree relatives - biological parents, siblings, or children) of short QT syndrome, long QT syndrome, unexplained sudden death at a young age (≤40 years), drowning, or sudden infant death syndrome.
✕. Positive screening results for Hepatitis B surface antigen (HBsAg), Hepatitis C virus (HCV) antibody, Treponema pallidum specific antibody, or Human Immunodeficiency Virus (HIV) antibody.
✕. Average daily alcohol consumption exceeding 2 units in the 2 years prior to screening, or weekly alcohol consumption \>14 units (1 unit alcohol ≈ 360 ml beer or 45 ml 40% spirits or 150 ml wine); consumption of any alcohol-containing product within 24 hours prior to investigational product administration; or inability to stop alcohol consumption during the trial; or positive alcohol breath test.
✕. Average daily cigarette consumption \>5 in the 2 years prior to screening, or inability to stop using any tobacco products during the trial.