A Study to Test if SAR443809 is Tolerated and Safe When Taken as a Single Dose in Healthy Adults

A First-in-human, Randomized, Double-blind, Placebo-controlled Study of the Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of Ascending Single Doses of SAR443809 in Healthy Adult Subjects

Primary objective

• The tolerability and safety of SAR443809 Secondary
• The PK parameters of SAR443809
• The PD activity of SAR443809
• The immunogenicity of SAR443809

Screening: up to 56 days (Day -56 to Day -2). Treatment: 1 day (treatment on Day 1, study observation period from Day -1 to Day 3). Follow-up and end of study: 105 days after IMP administration (follow up visits from Day 5 to Day 78; End of study visit on Day 106). Total study duration for each participant: approximately 23 weeks.

Inclusion Criteria: Having given written informed consent prior to undertaking any study-related procedure Exclusion Criteria: Participants are excluded from the study if any of the following criteria apply:

Any participant who, in the judgment of the Investigator, is likely to be noncompliant during the study, or unable to cooperate because of a language problem or poor mental development.

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.