The Safety and Tolerability of SerpinPC in Healthy Men and in Men with Severe Blood Disorders (haemophilia a and B)

Inclusion Criteria: Part 1a (Healthy Subjects) 1. Males age ≥18 years and ≤55 years. 2. Capable of giving written informed consent to participate after reading the information and consent form, and after having the opportunity to discuss the trial with the investigator or delegate. 3. Willingness to give written consent to have data entered into The Over-volunteering Prevention System (TOPS). 4. Sufficient intelligence to understand the nature of the trial and any hazards of participating in it. Ability to communicate satisfactorily with the investigator and to participate in, and comply with the requirements of the entire trial. 5. Screening D-dimer ≤ 750 µg/L 6. Non-user of nicotine products i.e. non-smokers or ex-smokers who have stopped smoking or who had stopped using cigarette replacements for at least 6 months before the first dose of IMP. 7. Male subject willing to use 2 highly effective methods of contraception from the first dose administration until 3 months after dosing. 8. Subject with a body mass index (BMI) of 18 - 30 kg/m2 and weight ≥ 60 kg. 9. Subject with no clinically significant history of previous drug allergies. 10. Subject with no clinically significant abnormal Cytokine levels (IL6 and TNFα), serum biochemistry, haematology, coagulation and urinalysis within 28 days before the first dose of IMP. 11. Subject with negative urinary drugs of abuse (DOA) and alcohol screens, determined within 28 days before the first dose of IMP (N.B. A positive test result may be repeated at the Investigator's discretion). 12. Subject with negative human immunodeficiency virus (HIV), and hepatitis B surface antigen (HBsAg) and/or hepatitis C virus antibody (HCV Ab) test results at Screening. 13. Subject with no clinically significant abnormalities in 12-lead electrocardiogram (ECG) determined within 28 days before the first dose of IMP. 14. Subject with no clinically significant abnormalities in vital signs (supine blood pressure/pulse rate, oral temperature) determined within 28 days before the first dose of IMP. 15. Subject must be available to complete the study (including all follow up visits). 16. Subject must satisfy an Investigator about his fitness to participate in the study. Part 1b and Part 2 (Patients) 1. Male age ≥18 years and ≤60 years. 2. Capable of giving written informed consent to participate after reading the information and consent form, and after having the opportunity to discuss the trial with the Investigator or delegate. 3. Patients with severe haemophilia (defined as having factor VIII/IX ≤ 0.02 IU/mL \[2%\]) with or without inhibitors, with an ABR (annualised bleeding rate) of 6 or more during the Observational Phase. 4. Patients on demand therapy with fVIII, fIX, rfVIIa (NovoSeven), FEIBA for treatment of bleeding. 5. Screening D-dimer ≤ 750 μg/L (DDU). 6. Adequate haematologic function, defined as having platelet count ≥ 100,000/μL (≥ 100 x 109/L) and haemoglobin ≥ 12 g/dL (≥ 120 g/L or ≥ 7.45 mmol/L) at the time of Screening and prior to the first dose administration. 7. Adequate hepatic function, defined as having total bilirubin ≤ 1.5x ULN (excluding Gilbert's syndrome) and AST and/or ALT ≤ 3x ULN at the time of Screening and prior to the first dose administration; no clinical signs or known laboratory OR radiographic evidence consistent with cirrhosis of the liver. 8. Adequate renal function, defined as having serum creatinine ≤ 2.5x ULN at the time of Screening and prior to the first dose administration. Part 3 (patients who have completed Week 24 of Part 2) 1. Completed Week 24 of Part 2 with no major compliance issues. 2. Capable of giving written informed consent to participate after reading the information and consent form, and after having the opportunity to discuss the extension study with the Investigator or delegate. 3. Adaquate haematologic function, defined as having platelet count ≥ 100,000/μL and haemoglobin ≥ 8 g/dL (4.97 mmol/L) at Week 20 in Part 2. 4. Adequate hepatic function, defined as having total bilirubin ≤ 1.5x ULN (excluding Gilbert's syndrome) and AST and/or ALT ≤ 3x ULN at Week 20 in Part 2 with no clinical signs or known laboratory or radiographic evidence consistent with cirrhosis. 5. Adequate renal function, defined as serum creatinine ≤ 2.5x ULN at Week 20 in Part 2. Part 4 (Patients who have completed Week 48 of Part 3): 1. Completed Week 48 of Part 3 with no major compliance issues. 2. Capable of giving written informed consent to participate after reading the information and consent form, and after having the opportunity to discuss the extension study with the Investigator or delegate. 3. Adequate haematologic function, defined as platelet count ≥ 100,000/μL and haemoglobin ≥ 8 g/dL (4.97 mmol/L) at Week 44 of Part 3. 4. Adequate hepatic function, defined as total bilirubin ≤ 1.5x ULN (excluding Gilbert's syndrome) and AST and/or ALT ≤ 3 x ULN at Week 44 of Part 3 with no clinical signs or known laboratory or radiographic evidence consistent with cirrhosis. 5. Adequate renal function, defined as serum creatinine ≤ 2.5x ULN at Week 44 of Part 3. Part 5 (Patients who have completed Week 24 of Part 4): 1. Completed Week 24 of Part 4 with no major compliance issues. 2. Capable of giving written informed consent to participate after reading the information and consent form, and after having the opportunity to discuss the extension study with the Investigator or delegate. 3. Adequate haematologic function, defined as platelet count ≥ 100,000/μL and haemoglobin ≥ 8 g/dL(4.97 mmol/L) at Week 20 of Part 4. 4. Adequate hepatic function, defined as total bilirubin ≤ 1.5x ULN (excluding Gilbert's syndrome) and AST and/or ALT ≤ 3 x ULN at Week 20 of Part 4 with no clinical signs or known laboratory or radiographic evidence consistent with cirrhosis. 5. Adequate renal function, defined as serum creatinine ≤ 2.5x ULN at Week 20 of Part 4. Part 6 (Patients who have completed Week 52 of Part 5): 1. Completed Week 52 of Part…

Reproduced word-for-word from the public registry record — the study team can answer questions about it.