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First-in-human Study of SAR443765 in Healthy Participants and in Asthmatic Participants

A Randomized, Double-blind, Placebo-controlled Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of Single and Multiple Ascending Doses of SAR443765 in Healthy Adult Participants and of a Single Dose of SAR443765 in Participants With Mild-to-moderate Asthma

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05366764
Enrollment
36
Registered
2022-05-09
Start date
2022-06-08
Completion date
2023-02-24
Last updated
2025-09-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Asthma

Brief summary

This is a 3-part, parallel group treatment, Phase 1, randomized, double-blind, placebo-controlled study to assess the safety, tolerability and pharmacokinetics after sequential single and multiple ascending doses of SAR443765 in healthy adult participants, and after a single dose of SAR443765 in participants with mild-to-moderate asthma.

Detailed description

The anticipated study duration per participant is up to 14 weeks

Interventions

DRUGSAR443765

solution for injection

DRUGPlacebo

solution for injection

DRUGSalbutamol or levosalbutamol

metered dose inhaler

Sponsors

Sanofi
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
Yes

Inclusion criteria

* Diagnosis of asthma for at least 12 months and confirmed at screening based on the Global Initiative for Asthma (GINA) 2020 Guidelines * Controlled asthma defined as no more than 1 canister of rescue inhaler per month over the last 3 months prior to baseline * Elevated FeNO level defined as ≥25 ppb * Participants, using as-needed SABA, ICS-naïve or with existing stable treatment (at least for 3 months prior to screening) with low to medium daily dose ICS (≤500 mcg of fluticasone propionate or comparable ICS daily dosage) potentially in combination with a LABA and/or LAMA as second controller, and/or with stable daily leukotriene receptor antagonist, leukotriene synthesis inhibitor and/or chromones * Prebronchodilator forced expiratory volume in 1 second (FEV1) ≥60% of predicted normal * Reversibility of at least 12% and 200 mL in FEV1 or forced vital capacity (FVC) after administration of 4 puffs (400 mcg) of albuterol/salbutamol or levalbuterol/levosalbutamol during screening or documented history of a reversibility test that meets this criteria within 5 years prior to screening or documented positive response to methacholine challenge (a decrease in FEV1 by 20% \[PC20\] of \<8 mg/mL) within 5 years prior to screening visit * Body weight between 50.0 and 105.0 kg, inclusive, if male, and between 40.0 and 95.0 kg, inclusive, if female, body mass index between 18.0 and 32.0 kg/m2 * Male participants are eligible to participate if they use condom during study period * A female participant is eligible to participate if she is not pregnant or breastfeeding, and one of the following conditions applies: Is a woman of non-childbearing potential (WONCBP) OR Is a woman of childbearing potential (WOCBP) and agrees to use a contraceptive method that is highly effective * A WOCBP must have a negative highly sensitive pregnancy test within 36 hours before the first administration of study intervention

Exclusion criteria

Participants are excluded from the study if any of the following criteria apply: * Any clinically relevant abnormal findings in medical history, physical examination, vital signs, 12-lead ECG. * Chronic lung disease, or another diagnosed pulmonary or systemic disease associated with elevated peripheral eosinophil counts. * History of life-threatening asthma, asthma exacerbation or use of systemic steroid within 3 months prior to screening visit * Worsening of asthma or respiratory infection within the last 6 weeks prior screening visit. * Symptomatic postural hypotension,history or presence of drug or alcohol abuse, current smoker or previous smoker with a smoking history \>10 pack-years. * Excessive consumption of beverages containing xanthine bases (more than 4 cups or glasses per day). NOTE: Other Inclusion/

Design outcomes

Primary

MeasureTime frameDescription
Number of participants with adverse events (AEs) /TEAEsFrom baseline up to Day 71Incidence of adverse events (AEs) and treatment-emergent adverse events (TEAEs)

Secondary

MeasureTime frameDescription
Pharmacokinetic (PK) assessment: AUClastFrom baseline up to Day 71Area under the plasma concentration versus time curve calculated using the trapezoidal method from time zero to the real time tlast
Pharmacokinetic (PK) assessment: AUCFrom baseline up to Day 71Area under the serum concentration versus time curve extrapolated to infinity
Change in Nitric Oxide (FeNO) levelDay 1 and Day 29Change from Baseline in FeNO level at Day 29
Pharmacokinetic (PK) assessment: CmaxFrom baseline up to Day 71Observed maximum plasma concentration
Total (free + bound) serum target concentrations of TSLPFrom baseline up to Day 71Change from baseline in total serum target concentrations of TSLP
Total (free + bound) serum target concentrations of IL-13From baseline up to Day 71Change from baseline in total serum target concentrations of IL-13
Presence of Anti-SAR443765 antibodies (ADA)From baseline up to Day 71Number of participant with SAR443765 antibodies

Countries

Germany, United Kingdom

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 8, 2026