HL-085 in Adults With Neurofibromatosis Type 1 (NF1) and Inoperable Plexiform Neurofibromas

Official title

A Multi-center, Open-label, Single-arm Phase II Study to Evaluate the Efficacy and Safety of HL-085 in the Treatment of Adult Participants With Neurofibromatosis Type 1 (NF1) and Inoperable Plexiform Neurofibromas

Overview

This is a Multi-center, Open-label, Single-arm Phase II Study to Evaluate the Efficacy and Safety of HL-085 in the treatment of Adult Participants with Neurofibromatosis Type 1 (NF1) and Inoperable Plexiform Neurofibromas(PN)

Detailed description

The study includes 2 parts, phase IIa and IIb. Phase IIa is to evaluate the preliminary safety, pharmacokinetic characteristics and efficacy of HL-085, and to determine the recommended dose. To observe the 9mg dose level, approximately 15 patients will receive HL-085 at a dose of 9mg BID on a continuous dosing schedule(1 cycle=21 days). The investigator and sponsor will evaluate the safety and efficacy data to determine whether HL-085 9mg BID is appropriate. HL-085 12mg BID, 6mg BID, or other HL-085 dosing regimen will be observed as needed. A total of 15-35 patients will be enrolled in phase IIa. Phase IIb is to further evaluate the safety and efficacy of HL-085 in patients with NF1 and inoperable PN and is expected to enroll 35 patients.

Interventions

• Drug HL-085
  IIa: HL-085 capsule 9mg administered orally twice daily in a continuous 21-day treatment cycle. If required, dosing schedule can be adjusted to 12mg BID, 6mg BID, or other dosage regimens. IIb: HL-085 at the recommended dose or dosage regimen.

Primary outcome measures

• Objective Response Rate (ORR) [Time frame: At the end of cycle 4,8,12,16,20,24,28,32.Then after every 8 cycles(each cycle is 21 days)]

Secondary outcome measures (4)

• Disease Control Rate（DCR） [Time frame: At the end of cycle 4,8,12,16,20,24,28,32.Then after every 8 cycles(each cycle is 21 days)]
• Duration of Overall Response（DOR） [Time frame: At the end of cycle 4,8,12,16,20,24,28,32.Then after every 8 cycles(each cycle is 21 days)]
• Progression Free survival (PFS) [Time frame: From date of dosing until the date of first documented progression or date of death from any cause, whichever came first, assessed up to 3 years]
• Pharmacokinetic characteristics [Time frame: During the intervention]

Eligibility criteria

Inclusion criteria

• Age: patients must be ≥18 years of age at the time of study entry.
• Diagnosis: Patients must have inoperable and symptomatic plexiform neurofibromas(PN), and patients must have NF1 mutation or meet at least 1 of the following NF1 diagnostic criteria:

① ≥6 cafe-au-lait macules ;

② Axillary freckling or freckling in inguinal regions;

③ ≥2 Lisch nodules (iris hamartomas);

④ A distinctive bony lesion such as dysplasia of the sphenoid bone or dysplasia or thinning of long bone cortex);

⑤ An optic pathway glioma;

⑥ First-degree relative with NF1.

• Patients must have a measurable lesion, defined as at least 3 cm in length, amenable to MRI for efficacy assessment.
• Eastern Cooperative Oncology Group (ECOG) performance status of 0-2.
• Patients are able to understand and voluntarily sign a written informed consent form.
• Patients must be willing and able to complete study procedures and follow-up examinations.

Exclusion criteria

• Patients who are unable to undergo MRI scans (prosthesis, prosthesis, braces, etc.) or patients with lesions that cannot be evaluated by MRI.
• Patients do not have adequate organ function.
• Patients who are unable to take drugs orally, have difficulty swallowing or anything that may lead to inadequate drug absorption.
• Prior treatment with MEK 1/2 inhibitors.
• Patients known to be allergic to the ingredients or analogues of the study drug.
• Patients with previous or current retinal diseases such as retinal vein occlusion (RVO), retinal pigment epithelium detachment (RPED), central serous retinopathy (CSR), etc. (except retinopathy caused by research diseases).
• With infections or other uncontrolled disease.
• Strong CYP2C9 inhibitors or inducers within 7 days before treatment of the study drug.
• Patients who received surgery within 4 weeks or radiotherapy within 6 weeks before enrollment.
• Patients who participated in any other clinical study treatment within 4 weeks before enrollment.
• Patients treated with anti-NF1 treatment with unresolved chronic toxicity.
• Clinical judgment by the investigator that the patient should not participate in the study.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

N/A

Model

Single group

Masking

Open label

Primary purpose

Treatment

Study locations

China · 1 center

• Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine — Shanghai

Identifiers

NCT: NCT05331105 · HL-085-106-II

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗