Tolerability, Pharmacokinetics and Pharmacodynamics of Ascending Single and Repeated Doses of SAR444336 in Healthy Adult Participants

Study Overview
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Brief Summary
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This phase 1 study will assess the safety and tolerability, and characterize the pharmacokinetic (PK) and pharmacodynamic (PD) profile of SAR444336 in healthy subjects following single- and repeated-dose administrations as a first step in clinical development prior to administering this new investigational medicinal product (IMP) to patients.

Detailed Description
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The anticipated study duration per participant is up to 10 weeks in Part 1. Screening: 2 to 28 days prior to dosing (Day -28 to Day -2) Treatment period: Day -1 to Day 29 post dose including Institutionalization: Day -1 until Day 8 Ambulant period including repeat PK and PD blood sampling and ambulant visits: Day 9 to Day 29 Follow-up period: Day 30 to Day 43 The anticipated study duration per participant is up to 17 weeks in Part 2. Screening: 2 to 28 days prior to dosing (Day -28 to Day -2) Treatment period: Day -1 to Day 57 (Q2W/3 doses or Q4W/2 doses) or Day -1 to Day 85 (Q4W/3 doses), or Day -1 to Day 50 (Q3W) including Institutionalization: Day -1 until Day 3 Ambulant period including repeat PK and PD blood sampling, ambulant visits and 24 hours institutionalization after 2nd and/or 3rd dose: Day 4 to Day 57 (Q2W/3 doses, Q4W/2 doses), Day 4 to Day 85 (Q4W/3 doses) or Day 50 (Q3W) Follow-up period: Day 58 to Day 71 (Q2W/3 doses or Q4W/2 doses), Day 71 to Day 85 (Q4W/3 doses) or Day 51 to Day 64 (Q3W)

Official Title
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A Randomized, Double-blind, Placebo-controlled Study of the Tolerability, Pharmacokinetics and Pharmacodynamics of Ascending Single and Repeated Subcutaneous Doses of SAR444336 in Healthy Adult Participants

Conditions
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Healthy Volunteer

Intervention / Treatment
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* Drug: SAR444336
* Drug: Placebo


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Male and female participants between 18 and 55 years of age inclusive. Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, and ECG. Laboratory values within normal range unless the abnormality is considered not clinical relevant by the investigator. The following parameters, however, must be within normal range: platelet count, and CRP. ALT, AST, total bilirubin (unless the participant has documented or suspected Gilbert syndrome) should be <1.25 ULN and serum creatinine should be < ULN. Eosinophils <500 cells/µL Normal vital signs after 10 minutes resting in supine position Standard 12-lead ECG parameters after 10 minutes resting in supine position in the normal ranges and normal ECG tracing unless the Investigator considers an ECG tracing abnormality to be not clinically relevant. Body weight between 50 - 110 kg (inclusive) and body mass index (BMI) between 18 - 30 kg/m2 (inclusive) at screening. Only for part 2: Fitzpatrick skin type I - III Exclusion Criteria: Any disease associated with immune system dysfunction. Known polyethylene glycol allergy Only for Part 2: Known seafood allergy Any current active viral, bacterial or fungal infection or any medically relevant infection having occurred within 3 weeks before inclusion. Any history or presence of clinically relevant cardiovascular, pulmonary, gastrointestinal, hepatic, renal, metabolic, hematological, neurological, osteomuscular, articular, psychiatric, autoimmune, systemic, ocular, or infectious disease, or signs of acute illness that would pose an unacceptable risk to the subject in the opinion of the investigator. Frequent headaches and/or migraine, recurrent nausea and/or vomiting (for vomiting only, more than twice a month). Blood donation >500 mL within 2 months before inclusion. Symptomatic postural hypotension, irrespective of the decrease in blood pressure, or asymptomatic postural hypotension defined as a decrease in systolic blood pressure ≥30 mmHg within 3 minutes when changing from supine to standing position. Presence or history of drug hypersensitivity, or allergic disease diagnosed and treated by a physician, except for history of mild allergic diseases which are not active at the time of inclusion and considered not clinically relevant in the opinion of the investigator. History or presence of drug or alcohol abuse. Smoking regularly more than 10 cigarettes or equivalent per week, unable to stop smoking during the study (occasional smoker can be enrolled). Excessive consumption of beverages containing xanthine bases. Presence or history of any atopic disease. for Part 1: Non-live booster COVID-19 vaccination within 14 days before randomization. First (and second, if applicable) COVID-19 vaccinations are not allowed within 4 weeks before randomization. for Part 2: Non-live vaccines including Covid-19: last administration of a vaccine within 4 weeks before randomization. Live vaccines: Last administration of a vaccine within 3 months before randomization; Immunomodulatory medication within 60 days before screening. Only for Part 2: Participants with known previous exposure to KLH. Any medication (including St John's Wort) within 14 days before inclusion or within 5 times the elimination half-life or pharmacodynamic half-life of the medication; any vaccination within the last 28 days (except COVID-19 booster vaccination) and any biologics (antibody or its derivatives) given within 4 months before inclusion. Positive result on any of the following tests: hepatitis B surface (HBs Ag) antigen, antihepatitis B core antibodies (anti-HBc Ab), anti-hepatitis C virus (anti-HCV) antibodies, anti-HIV1 and anti HIV2 Ab. Positive result on urine drug screen. Positive alcohol breath test. The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 55 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: SAR444336<br>SAR444336 | Drug: SAR444336<br>* Single or repeated dose subcutaneous injection<br>|
| Placebo Comparator: Placebo<br>placebo | Drug: Placebo<br>* Single or repeated dose subcutaneous injection<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Part 1: Number of subjects with treatment-emergent adverse events (TEAEs) | Clinical laboratory evaluations including eosinophils, procalcitonin, and c-reactive protein (CRP), Vital signs, 12-lead electrocardiogram (ECG) | Until Day 43 | 
| Part 2: Number of subjects with treatment-emergent adverse events (TEAEs) | Clinical laboratory evaluations including eosinophils, procalcitonin, and c-reactive protein (CRP), Vital signs, 12-lead electrocardiogram (ECG) | Until Day 85 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Plasma PK parameters: Cmax | Maximum plasma concentration observed | Until Day 29 and Day 85 | 
| Plasma PK parameters: tmax | Time to reach Cmax | Until Day 29 and Day 85 | 
| Plasma PK parameters: AUClast | Area under the plasma concentration versus time curve over the dosing interval from time 0 until the last concentration above the limit of quantification | Until Day 29 and Day 85 | 
| Plasma PK parameters: AUC | Area under the plasma concentration versus time curve extrapolated to infinity | Until Day 29 and Day 85 | 
| Plasma PK parameters: t1/2z | Terminal half-life | Until Day 29 and Day 85 | 
| Plasma PK parameters: CL/F | Apparent total body clearance after a single extravascular dose | Until Day 29 and Day 85 | 
| Anti-SAR444336 antibodies |  | Until Day 29 and Day 85 |