Study of Efficacy, Safety and Tolerability of Remibrutinib in Adult Participants With an Allergy to Peanuts

Responder rate was defined as the percentage of participants tolerating a single dose of >= 600 mg (1044 mg cumulative tolerated dose) of peanut protein without dose-limiting symptoms during the double blind placebo controlled food challenge (DBPCFC). The cumulative tolerated dose is the sum of the tolerated doses, not including the reactive dose. Dose-limiting symptoms indicate a true allergic reaction occurring during administration of a single dose of peanut protein at the DBPCFC that should preclude the administration of any further doses in the view of the investigator. Symptoms that require administration of any rescue medication were considered dose-limiting symptoms.

Responder rate was defined as the percentage of participants tolerating a single dose of >= 1000 mg (2044 mg cumulative tolerated dose) of peanut protein without dose-limiting symptoms during the double blind placebo controlled food challenge (DBPCFC). The cumulative tolerated dose is the sum of the tolerated doses, not including the reactive dose. Dose-limiting symptoms indicate a true allergic reaction occurring during administration of a single dose of peanut protein at the DBPCFC that should preclude the administration of any further doses in the view of the investigator. Symptoms that require administration of any rescue medication were considered dose-limiting symptoms.

Responder rate was defined as the percentage of participants tolerating a single dose of >= 3000 mg (5044 mg cumulative tolerated dose) of peanut protein without dose-limiting symptoms during the double blind placebo controlled food challenge (DBPCFC). The cumulative tolerated dose is the sum of the tolerated doses, not including the reactive dose. Dose-limiting symptoms indicate a true allergic reaction occurring during administration of a single dose of peanut protein at the DBPCFC that should preclude the administration of any further doses in the view of the investigator. Symptoms that require administration of any rescue medication were considered dose-limiting symptoms.

Responder rate was defined as the percentage of participants tolerating a single dose of >= 600 mg (1044 mg cumulative tolerated dose) of peanut protein without dose-limiting symptoms during the double blind placebo controlled food challenge (DBPCFC). The cumulative tolerated dose is the sum of the tolerated doses, not including the reactive dose. Dose-limiting symptoms indicate a true allergic reaction occurring during administration of a single dose of peanut protein at the DBPCFC that should preclude the administration of any further doses in the view of the investigator. Symptoms that require administration of any rescue medication were considered dose-limiting symptoms.

Maximum severity of symptoms occurring at any challenge dose of peanut protein up to and including 3000 mg during the DBPCFC conducted at one month, will be categorized as 4 levels: None, Mild, Moderate, Severe.

IgE is a soluble biomarker that provide LOU064 response to treatment and disease severity biomarkers.

IgG4 is a soluble biomarker that provide LOU064 response to treatment and disease severity biomarkers.

An allergen specific skin prick test (SPT) is a commonly used diagnostic tool. In this study a titration SPT using peanut allergen provided additional information on the impact of Bruton's tyrosine kinase (BTK) suppression on skin mast cells. Skin reactions were recorded after 15 minutes of applying allergen to the pricked location. The size of the wheel and flare (the longest diameter and the midpoint orthogonal diameter) at each site were recorded.

Cmax is the maximum (peak) observed blood concentration of LOU064 after dose administration. Pharmacokinetic parameters were calculated using a non-compartmental method (WinNonLin Version 8.3.4 or higher). The LOU064 concentration was determined by a validated Liquid chromatography-mass spectrometry (LC-MS/MS) method with a lower limit of quantification (LLOQ) of 0.1 ng/mL.

AUClast is the area under the blood concentration-time curve from time zero to the time of last quantifiable concentration (tlast) of LOU064. Pharmacokinetic parameters were calculated using a non-compartmental method (WinNonLin Version 8.3.4 or higher). The LOU064 concentration was determined by a validated Liquid chromatography-mass spectrometry (LC-MS/MS) method with a lower limit of quantification (LLOQ) of 0.1 ng/mL.

AUCtau is the area under the plasma concentration-time curve. Estimation of AUCtau values required extrapolation of the concentration-time profile from the last measured time-point at 4 h to the end of dosing interval at 12 h post-dose. In some cases, this extrapolation was not possible. For this reason, the number of participants with measurable AUCtau values was less when compared to those with AUClast. Pharmacokinetic parameters were calculated using a non-compartmental method (WinNonLin Version 8.3.4 or higher). The LOU064 concentration was determined by a validated Liquid chromatography-mass spectrometry (LC-MS/MS) method with a lower limit of quantification (LLOQ) of 0.1 ng/mL.

Tmax is the time to reach maximum (peak) of LOU064 blood concentration after single-dose administration (time). Pharmacokinetic parameters were calculated using a non-compartmental method (WinNonLin Version 8.3.4 or higher). The LOU064 concentration was determined by a validated Liquid chromatography-mass spectrometry (LC-MS/MS) method with a lower limit of quantification (LLOQ) of 0.1 ng/mL.

Responder rate was defined as the percentage of participants tolerating a single dose of >= 3000 mg (5044 mg cumulative tolerated dose) of peanut protein without dose-limiting symptoms during the double blind placebo controlled food challenge (DBPCFC). The cumulative tolerated dose is the sum of the tolerated doses, not including the reactive dose. Dose-limiting symptoms indicate a true allergic reaction occurring during administration of a single dose of peanut protein at the DBPCFC that should preclude the administration of any further doses in the view of the investigator. Symptoms that require administration of any rescue medication were considered dose-limiting symptoms.