IAMA-6 Oral Dose Study in Healthy Adults

The Sponsor's proposed clinical trial is a randomized, double blind, placebo controlled first in human study. This is a single ascending dose (SAD) and multiple ascending dose (MAD) study to investigate the safety, tolerability, pharmacokinetics, pharmacodynamics and food effect of IAMA-6 administered orally to healthy adults.

The study consists of the following 3 elements:

Part A: Single Ascending Dose

Part A includes up to 6 cohorts of 8 healthy male and female participants, each receiving a single oral dose of IAMA-6 or placebo (6 IAMA-6 and 2 placebo):

• Group A1 (N=8): IAMA-6 Dose 1 (N=6) or Placebo (N=2)
• Group A2 (N=8): IAMA-6 Dose 2 (N=6) or Placebo (N=2)
• Group A3 (N=8): IAMA-6 Dose 3 (N=6) or Placebo (N=2)
• Group A4 (N=8): IAMA-6 Dose 4 (N=6) or Placebo (N=2)
• Group A5 (N=8): IAMA-6 Dose 5 (N=6) or Placebo (N=2)
• Group A6 (N=8): IAMA-6 Dose 6 (N=6) or Placebo (N=2)

In each cohort, treatment will be randomly assigned, such that 2 participants (1 IAMA-6 and 1 placebo) will be dosed first, as sentinel subjects. If safety and tolerability results are acceptable, based on any adverse reactions or events, after at least 24 hours, the remaining 6 participants will be randomly assigned treatment (5 IAMA-6 and 1 placebo) and dosed. All doses will be taken in a fasting state.

Dose escalation will only occur after all safety data from the completed dose group have been reviewed by the sponsor and site investigator, and it has been determined safe to proceed to the next dose cohort.

Part B: Food Effect After completion of the SAD dose escalation (Part A and review of the PK and safety data, one cohort of subjects who received IAMA-6 (n = 6) at the highest safe dose with measurable exposure, will return to the clinic to receive a 2nd dose of IAMA-6 in the fed state to determine the potential effect of food on the bioavailability of IAMA-6 before initiating Part C. The dose of IAMA-6 will be taken after a high fat meal as described in regulatory guidelines (FDA model).

Part C: Multiple Ascending Dose Part C includes up to 3 cohorts of 8 healthy male and female participants, each receiving oral doses of IAMA-6 or placebo (6 IAMA-6 and 2 placebo) for 7 consecutive days, as follows, the doses and the posology being selected according to their acceptable safety, tolerability and pharmacokinetics in Part A. Doses will be taken either with or without food according to the results of Part B of the study.

• Group C1 (N=8): IAMA-6 Dose X (N=6) or Placebo (N=2)
• Group C2 (N=8): IAMA-6 Dose Y (N=6) or Placebo (N=2)
• Group C3 (N=8): IAMA-6 Dose Z (N=6) or Placebo (N=2)

In each cohort, treatment will be randomly assigned, such that 2 participants (1 IAMA-6 and 1 placebo) will be dosed first, as sentinel subjects. If the safety and tolerability results are acceptable, based on any reaction or adverse events, after at least 72 hours, the 6 remaining participants will be randomly assigned treatment (5 IAMA-6 and 1 placebo) and dosed. There will be a 7 day follow up after last dosing for all participants followed by review of clinical and laboratory safety data before starting treatment of the next dose cohort.

Inclusion criteria

• Healthy male and female subjects.
• Aged between 18 and 55 years.
• Written informed consent; willing and able to comply with procedures.
• Females will not be pregnant or lactating, and females of childbearing potential and males will agree to use contraception.
• Body mass index of 18.0 to 30.0 kg/m2, inclusive; and a total body weight >50 kg up to a maximum of 110 kg.
• The subject must be willing to return to the study centre for study treatment and study-related follow-up procedures as required by the protocol.

Exclusion criteria

• Current or past history of a clinically significant (as judged by the Investigator) cardiovascular, cerebrovascular, respiratory, gastrointestinal, hematologic, renal, hepatic, immunologic, metabolic, urologic, neurologic, dermatologic, psychiatric, or other major disease/condition, as determined by the Principal Investigator or Designee.
• Any history of central nervous system problems (e.g. epilepsy, head injury, loss of consciousness).
• Any history of malignancy in the previous 5 years involving any organ system (other than localised basal cell carcinoma of the skin).
• Body Mass Index: <18 kg/m2 , or >30 kg/m2.
• Abnormal vital signs, including known history of hypertension, resting oxygen saturation <95% by pulse oximetry.
• ECG at screening or on Day -1 showing QTcF interval >450 msec in males or >470 msec in females, or presence of any clinically significant dysrhythmia.
• History of hypersensitivity to any medicinal product(s) or severe hypersensitivity/anaphylaxis with unclear aetiology.
• Any clinically significant abnormal chemistry values.
• Any clinically significant abnormal haematology values.
• Blood donation within the past 3 months.
• Seropositivity for HBsAg, HCV, HIV 1, or HIV 2.
• Has a positive nasopharyngeal test for SARS-CoV-2 within 48h before unit admission.
• If female, has a positive highly sensitive urine pregnancy test at Screening or Day 1.
• If female and of child-bearing potential, and not meeting the approved criteria for highly effective methods of birth control.
• Receipt of any Investigational Drug within the past 6 months.
• Use of prescription medication within 14 days prior to dosing and antibiotics within 30 days prior to dosing.
• Intake of OTC preparations, vitamins, minerals, herbal remedies within 48h prior to dosing.
• Current smokers or history of smoking in previous 6 months.
• Current or history of drug, alcohol, nicotine abuse, or excessive coffee (>5 cups/day) or tea drinking (>5 cups/day).
• Inadequate comprehension of study risks and requirements.