Efficacy and Safety of Selumetinib in Adults With NF1 Who Have Symptomatic, Inoperable Plexiform Neurofibromas

Phase 3Active Not RecruitingNCT04924608

AstraZeneca145 enrolled

Overview

A global study to demonstrate the effectiveness of selumetinib in participants with NF1 who have symptomatic, inoperable plexiform neurofibromas.

This is a randomized, double-blind, placebo-controlled, 2 arm multicentre, global Phase III study to assess the efficacy and safety of selumetinib compared with placebo in adult participants with NF1 who have symptomatic, inoperable PN.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

QUADRUPLE

Enrollment

145

Conditions

Neurofibromatosis 1 Plexiform Neurofibroma (PN)

Interventions

SelumetinibDRUG

Selumetinib oral capsules (10 mg and 25 mg)

PlaceboOTHER

Placebo oral capsules for Selumetinib masking (10 mg and 25 mg)

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Key Inclusion Criteria: * Adults ≥ 18 years at enrollment with diagnosis of NF1 with symptomatic, inoperable PN * At least one inoperable target PN measurable by volumetric MRI analysis * Chronic target PN pain score documented for minimum period during screening period * Stable chronic PN pain medication use at enrollment * Adequate organ and marrow function Key Exclusion Criteria: * Confirmed or suspected malignant glioma or MPNST (low grade glioma, including optic glioma not requiring systemic therapy or radiation therapy are exempt from this exclusion) * History of malignancy except for malignancy treated with curative intent with no known active disease ≥ 5 years before the first dose of study intervention and of low potential risk for recurrence * Clinically significant cardiovascular disease, including inherited coronary disease, acute coronary syndrome within 6 months prior to enrollment, uncontrolled angina, symptomatic heart failure, cardiomyopathy, severe valvular heart disease, abnormal LVEF and uncontrolled hypertension * Ophthalmological findings/conditions including intraocular pressure \> 21 mmHg, RPED/CSR or RVO * Prior exposure to MEK inhibitors

Locations (34)

Research Site

Outcomes

Primary Outcomes

Confirmed Partial and Complete Response Rate (ORR) by End of Cycle 16 Using Volumetric MRI Analysis as Determined by ICR (Per REiNS Criteria) in Participants With NF1 Who Have Symptomatic, Inoperable PN.

Objective response rate is defined as the proportion of participants who have a confirmed CR (defined as disappearance of the target PN, confirmed by a consecutive scan within 3 to 6 months after the first response) or confirmed PR (defined as a target PN volume decrease ≥ 20%, compared to baseline, confirmed by a consecutive scan within 3 to 6 months after the first response) by end of Cycle 16 as determined by ICR per REiNS criteria. Increase in the volume of the target PN by 20% or more compared to baseline or the time of best response after documenting a PR is considered as PD.

Time frame: From first dose up until progression (if it occurs prior to the end of Cycle 16), or the last evaluable assessment up to and including the end of Cycle 16, excluding MRI during prolonged study intervention interruption (defined as interruption >= 28 days)

Secondary Outcomes

(First Key Secondary) The Difference of the Means in the Change From Baseline in PAINS-pNF Chronic Target PN Pain Intensity Score at Cycle 12 Between Selumetinib and Placebo, Primary Analysis

The PAINS-pNF (Pain Intensity Scale for Plexiform Neurofibroma) chronic target PN pain intensity measures the participants' experience of chronic PN-related pain intensity with score from 0 (no chronic tumor pain) to 10 (worst chronic tumor pain). Baseline PAINS-pNF chronic target PN pain score is defined as the average of the available daily PAINS-pNF chronic target PN pain scores in the screening perio, while for Cycle 12, it is defined as the average of the available daily scores for the 28-days cycle up to and including the last day assessment of cycle 12. The difference of the means in the change from baseline at Cycle 12 between selumetinib and placebo in participants with a PAINS-pNF chronic target PN pain score of ≥ 3 at baseline is presented.

Time frame: Baseline and end of cycle 12 of study intervention

(First Key Secondary) The Difference of the Means in the Change From Baseline in PAINS-pNF Chronic Target PN Pain Intensity Score at Cycle 12 Between Selumetinib and Placebo, Supplemental Analysis

Data from ClinicalTrials.gov

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