Cobimetinib in Refractory Langerhans Cell Histiocytosis (LCH), and Other Histiocytic Disorders (NACHO-COBI)

A Phase 2 Study to Assess the Safety and Efficacy of Cobimetinib in Refractory Langerhans Cell Histiocytosis, LCH-Associated Neurodegenerative Disease, and Other Histiocytic Disorders.

This is a research study of a drug called cobimetinib in children and adults diagnosed with Langerhans cell histiocytosis (LCH), and other histiocytic disorders that has returned or does not respond to treatment. Cobimetinib blocks activation of a protein called Mitogen-activated protein kinase (MEK) that is part of incorrect growth signals in histiocytosis cells. Four different groups of patients will be enrolled.

Study Overview

• Status: Recruiting
• Conditions: Histiocytic Sarcoma; Juvenile Xanthogranuloma; Histiocytic Disorders, Malignant; Erdheim-Chester Disease; Langerhan's Cell Histiocytosis; Rosai Dorfman Disease; Neuro-Degenerative Disease
• Intervention / Treatment: Drug: Cobimetinib

Detailed Description

Histiocytic disorders are diseases caused by misfunctioning or buildup of particular immune cells called histiocytes. Many histiocytic disorders (LCH, juvenile xanthogranuloma (JXG), Erdheim-Chester disease (ECD), and Rosai-Dorfman Disease (RDD)) arises from blood cells that receive incorrect growth signals. These incorrect signals are caused by changes in genes (mutations) that lead to tissue damage (lesions) which causes disease. Some patients with LCH can develop neurodegeneration (LCH-ND) which is damage to neurons that results in reduced brain function, from LCH cells that go to the brain and activate inflammation. LCH arises from blood cells that receive incorrect growth signals. These incorrect signals are caused by mutations (changes in genes). The LCH blood cells can create changes in the structure of almost any organ, and can cause damage to normal organ function.

The purpose of this research study is to learn whether cobimetinib is safe and effective in subjects diagnosed with LCH, LCH-ND, RDD, JXG and ECD which may have a specfic mutation called BRAF-V600E. In healthy cells, certain proteins (called BRAF and MEK) are thought to help control normal cell growth. BRAF-V600E is a specific change in a gene that may cause cancer cells to grow and spread by sending constant signals to the MEK protein. Cobimetinib is designed to attach to and block the activity of MEK.

• Study Type: Interventional
• Enrollment (Anticipated): 90
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Carl E Allen, MD, PhD; Phone Number: 832-822-4242; Email: ceallen@texaschildrens.org
• Study Contact Backup: Name: Olive Eckstein, MD; Phone Number: 832-822-4242; Email: Eckstein@bcm.edu

Study Locations

• United States
  • Arizona
    • Phoenix, Arizona, United States, 85016
      • Recruiting
      • Phoenix Children's Hospital
      • Contact: Michael Henry, MD; Phone Number: 602-933-0920; Email: mhenry@phoenixchildrens.org
  • California
    • Orange, California, United States, 92868
      • Recruiting
      • Children's Hospital of Orange County
      • Contact: Lilbeth Torno, MD; Phone Number: 714-509-4348; Email: LTORNO@choc.org
  • District of Columbia
    • Washington, District of Columbia, United States, 20010
      • Recruiting
      • Children's National Hospital
      • Contact: Birte Wistinghausen, MD; Phone Number: 202-476-2800; Email: bwistingha@childrensnational.org
  • Maryland
    • Baltimore, Maryland, United States, 21287
      • Recruiting
      • John Hopkins University School of Medicine
      • Contact: Elias T Zambidis, MD PhD; Phone Number: 410-614-0123; Email: Ezambid1@jhmi.edu
  • Tennessee
    • Memphis, Tennessee, United States, 38105
      • Not yet recruiting
      • NACHO Consortium
      • Contact: Sara Clyburn; Phone Number: 901-595-6042; Email: Sara.Clyburn@STJUDE.ORG
      • Contact: Heidi Clough; Phone Number: 901-595-0362; Email: Heidi.Clough@STJUDE.ORG
  • Texas
    • Dallas, Texas, United States, 75235
      • Recruiting
      • Children's Medical Center
      • Contact: Erin Butler, MD; Phone Number: 214-648-6332; Email: erin.butler@utsouthwestern.edu
    • Houston, Texas, United States, 77030
      • Recruiting
      • Texas Children's Hospital
      • Contact: Carl E. Allen, MD, PhD; Phone Number: 832-826-0860; Email: ceallen@txch.org
  • Wisconsin
    • Madison, Wisconsin, United States, 53792
      • Recruiting
      • University of Wisconsin-American Family Children's Hospital
      • Contact: Diane Puccetti, MD; Phone Number: 608-263-6691; Email: puccetti@pediatrics.wisc.edu

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Child; Adult; Older Adult
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

INCLUSION CRITERIA:

Age at study entry

• For Group 1: Participant must be at least 6 months of age and less than 21 years of age at the time of enrollment
• For Group 2: Participant may be at least 6 months of age at the time of enrollment
• For Group 3: Participant must be at least 6 months of age and less than 21 years of age at the time of enrollment
• For Group 4: Participant must be 21 years of age or older at the time of enrollment
• Participant must be able to take an enteral dose and formulation of medication. Study medication is only available as an oral suspension or tablet which may be taken by mouth or other enteral route such as nasogastric or gastric tube.
• Biopsy proven LCH -AND
• Failure of at least front-line therapy for LCH with evaluable disease. -OR
• Diagnosis of LCH-associated neurodegenerative disease with radiologic or clinical progression within the past 3 months. -OR
• Biopsy proven JXG, ECD, RDD, histiocytic sarcoma, or other histiocytic lesion (newly diagnosed or relapsed/refractory disease) with evaluable active disease.

Performance Level:

-Karnofsky ≥ 50% for patients > 16 years of age and Lansky ≥ 50% for patients ≤ 16 years of age.

Adequate Hematologic Function Defined as:

• ANC ≥ 0.75 x 10^9/L (unsupported/without growth factor stimulant)
• Platelet count ≥ 75 x 10^9/L (unsupported/without transfusion within the past 7 days).
• Patients with marrow disease must have platelet count of >/= 75 x 10^9/L (transfusion support allowed) and must not be refractory to platelet transfusions.
• Hemoglobin ≥ 8 g/dL (unsupported/without transfusion within the past 7 days)
• Patients with marrow disease must have hemoglobin ≥ 8 g/dL (transfusion support allowed).

Adequate Renal Function Defined as:

- Calculated creatinine clearance (or radioisotope GFR) ≥ 70 mL/min/1.73m^2 or serum creatinine based on age/gender as follows:

Maximum Serum Creatinine (mg/dL) Age 2 to < 6 years: Male 0.8 mg/d, Female 0.8; 6 to < 10 years: Male 1 mg/dL,Female 1; 10 to < 13 years: Male 1.2 mg/dL; Female 1.2; 13 to < 16 years: Male 1.5 mg/dL ; Female 1.4; ≥ 16 years: Male 1.7 mg/dL; Female 1.4;

Adequate Liver Function Defined as:

• Bilirubin (sum of conjugated + unconjugated) ≤ 1.5 x upper limit of normal (ULN) for age
• AST and ALT ≤ 3x ULN (≤ 5 x ULN for participants with liver involvement)
• Serum albumin ≥ 2 g/dL.

For patients with liver disease caused by histiocytic disorder:

• Patients may be enrolled with abnormal bilirubin, AST, ALT and albumin with documentation of histiocytic liver disease.

Adequate Cardiac Function Defined as:

- Fractional shortening (FS) of ≥ 30% or ejection fraction of ≥ 50% by echocardiogram at baseline, as determined by echocardiography or multigated acquisition scan (MUGA) within 28 days prior to enrollment. Depending on institutional standard, either FS or LVEF is adequate for enrollment if only one value is measured; if both values are measured, then both values must meet criteria above

Pregnancy/Birth Control

• Female patients of childbearing potential require a negative urine or serum pregnancy test for eligibility and again at database registration, if more than 2 weeks has elapsed.
• Female patients of childbearing potential must agree to follow the contraceptive requirements using two forms of effective contraceptive methods for the duration of the study treatment. Male patients with sexual partners who are pregnant or who could become pregnant (i.e., women of child-bearing potential) must agree to use two forms of effective methods of contraception (one of which must be a barrier method) during the treatment period and for at least 3 months after the last dose of the study drug to avoid pregnancy and/or potential adverse effects on a developing embryo. Agreement to true abstinence (not periodic abstinence or withdrawal method) is an acceptable method of birth control.

EXCLUSION CRITERIA:

- Prior and Concomitant Use of Drugs with CYP3A4 inducing/inhibiting activity: Patient taking strong inducers or inhibitors of CYP3A4 within 14 days prior to study enrollment, including but not limited to the following: erythromycin, clarithromycin, ketoconazole, azithromycin, itraconazole, grapefruit juice or St. John's wort.

• Prior Therapy Restrictions Completion of previous chemotherapy, immunotherapy, radiotherapy, or targeted therapy for LCH (or other histiocytic disorder) at least 28 days (except where specified below) prior to study enrollment, with resolution of all associated toxicity to ≤ Grade 1 prior to study enrollment (exception for alopecia and ototoxicity which do not need to be resolved ≤ Grade 1). Patients must have fully recovered from the acute toxic effects of all prior anti-cancer therapy and must meet the following minimum duration from prior anti-cancer directed therapy prior to enrollment. If after the required timeframe, the laboratory eligibility criteria are met, the patient is considered to have recovered adequately.

  • Radiation therapy within the 28 days prior to enrollment.
  • Any prior treatment with Cobimetinib.
  • Treatment with a long-acting hematopoietic growth factor within 14 days prior to initiation of study drug or a short-acting hematopoietic growth factor within 7 days prior to enrollment.
  • Treatment with hormonal therapy (except hormone replacement therapy or oral contraceptives), immunotherapy, biologic therapy, investigational therapy, or herbal cancer therapy within 28 days or < 5 half-lives, whichever is longer, prior to study enrollment.
  • Treatment with high-dose chemotherapy and stem-cell rescue (autologous stem cell transplant) or allogeneic stem cell transplant within 90 days prior to enrollment. Anti-GVHD agents post-transplant: Patients who are receiving cyclosporine, tacrolimus or other agents to prevent graft-versus-host disease post bone marrow transplant are not eligible for this trial.
  • For patients with brain tumors (intracranial masses), use of anticoagulants within 7 days prior to enrollment.
  • Corticosteroid therapy <0.5 mg/kg/day averaged during the month prior to study enrollment is permissible but must be discontinued fourteen (14) days prior to enrollment. Patients with documented brain lesions receiving corticosteroids for management of cerebral edema must be on a stable dose for fourteen (14) days prior to enrollment.
  • Patient has received treatment with investigational therapy within 4 weeks prior to initiation of study drug.
  • Patients taking anticoagulants or have a pre-existing bleeding disorder unrelated to histiocytic disease.

• Exclusions for other illness

  • Other active malignancy or history of secondary malignancy.
  • Refractory nausea and vomiting, malabsorption, external biliary shunt
  • Infection: Patients who have a known active infection (excluding documented fungal infection of the nail beds) within 28 days prior to enrollment that has not completely resolved.
  • Major surgical procedure or significant traumatic injury within 28 days prior to enrollment, or anticipation of need for major surgical procedure during the course of the study. Placement of a vascular access device or minor surgery is permitted within fourteen (14) days prior to study enrollment (provided that the wound has healed).
  • History of significant bowel resection that would preclude adequate absorption or other significant malabsorptive disease.
  • History of pneumonitis.
  • Ophthalmologic considerations: Patients with known significant ophthalmologic conditions or known risk factors for retinal vein occlusion are not eligible. Specifically, patients with a history of retinal vein occlusion (RVO), retinal detachment, retinal pathology on ophthalmologic exam, retinopathy of prematurity, central serous chorioretinopathy (CSSCR), neovascular retinopathy, intraocular pressure > 21 mmHg, and predisposing factors to RVO (e.g., uncontrolled hypertension, diabetes, or hyperlipidemia, coagulopathy) will be excluded. Patients with longstanding and stable ophthalmologic findings secondary to existing conditions are eligible with appropriate written documentation and approval from Study Chair.
  • History of solid organ transplantation: Patients who have received a prior solid organ transplantation are not eligible.
  • Any other disease, metabolic or psychological dysfunction, physical examination finding, or clinical laboratory finding giving reasonable suspicion of a disease or condition that in the opinion of the investigator contraindicates use of an investigational drug or places the patient at unacceptable risk from treatment complications.

• History of clinically significant cardiac dysfunction, including the following:

  • Clinically significant cardiac arrhythmias including brady-arrhythmias and/or patients who require anti-arrhythmic therapy (with the exception of beta blockers or digoxin). Patients with controlled atrial fibrillation are not excluded.
  • Unstable arrhythmia
  • Unstable angina, or new-onset angina within 3 months prior to initiation of study treatment
  • Symptomatic congestive heart failure, defined as New York Heart Association Class II or higher
  • Myocardial infarction within 3 months prior to initiation of study treatment
• Known chronic human immunodeficiency virus (HIV).
• History of Grade ≥ 2 CNS hemorrhage or history of any CNS hemorrhage within 28 days of enrollment.
• Female patients who are pregnant or lactating. Pregnant or lactating women will not be entered on this study because there is no available information regarding human fetal or teratogenic toxicities.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Parallel Assignment
• Masking: None (Open Label)

Number of Arms

4

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Patients < 21 years with recurrent LCH (Grp1); Children (≥ 6 months) and young adults (<21 years) with recurrent active LCH lesions (may also have LCH-ND).	Drug: Cobimetinib; All groups will receive the same intervention. Cobimetinib will be given orally at a maximum dose of 60mg daily for 21 days on, then 7 days off, in a 28-day treatment cycle for a total of 12 cycles (approximately 12 months).; Other Names: COTELLIC; RO5514041
Experimental: Patients of any age with LCH-ND (Grp2); Patients of any age (≥ 6 months) with progressive LCH Neurodegenerative Disease (LCH-ND) without other sites of active LCH.	Drug: Cobimetinib; All groups will receive the same intervention. Cobimetinib will be given orally at a maximum dose of 60mg daily for 21 days on, then 7 days off, in a 28-day treatment cycle for a total of 12 cycles (approximately 12 months).; Other Names: COTELLIC; RO5514041
Experimental: Patients <21 years with other histiocytic disorders (Grp3); Newly diagnosed or relapsed/refractory children (≥ 6 months) and young adults (<21 years) with other histiocytic disorders including juvenile xanthogranuloma, Erdheim-Chester disease, histiocytic sarcoma and Rosai-Dorfman disease.	Drug: Cobimetinib; All groups will receive the same intervention. Cobimetinib will be given orally at a maximum dose of 60mg daily for 21 days on, then 7 days off, in a 28-day treatment cycle for a total of 12 cycles (approximately 12 months).; Other Names: COTELLIC; RO5514041
Experimental: Patients ≥ 21 years with LCH/histiocytic disorders (Grp4); Adults (≥21 years) with LCH or other histiocytic disorder with recurrent active lesions (may also have LCH-ND).	Drug: Cobimetinib; All groups will receive the same intervention. Cobimetinib will be given orally at a maximum dose of 60mg daily for 21 days on, then 7 days off, in a 28-day treatment cycle for a total of 12 cycles (approximately 12 months).; Other Names: COTELLIC; RO5514041

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Overall Response Rates using modified RECiST criteria	Proportion of participants with (complete response, partial response, stable disease, progressive disease) by 1 year of therapy with Cobimetinib. It is assumed that at each protocol-specified timepoint, a response assessment occurs. Status calculation will occur at each timepoint for patients who have measurable disease at baseline per the criteria defined in the protocol.	12 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Progression Free Survival	Progression Free Survival defined as the length of time during and after the treatment of a disease, that a patient lives with the disease but it does not get worse.	12 months
Nature and Severity of Adverse Events	Assessment of the nature and severity of adverse events in patients treated with Cobimetinib for histiocytic disorders.	12 months

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Response assessment (Modified RECIST) of histiocytic lesions with specific mutations	Response assessment using modified RECIST criteria for target lesions with specific mutations (e.g. BRAF-V600E) . Best response rate by 1 year of therapy.	12 months

Collaborators and Investigators

• Sponsor: Carl Allen
• Collaborators: Baylor College of Medicine; Genentech, Inc.; North American Consortium for Histiocytosis
• Investigators: Study Chair: Carl E Allen, MD, PhD, Baylor College of Medicine

Study record dates

Study Major Dates

• Study Start (Actual): April 19, 2021
• Primary Completion (Anticipated): December 1, 2024
• Study Completion (Anticipated): December 1, 2029

Study Registration Dates

• First Submitted: August 10, 2019
• First Submitted That Met QC Criteria: September 4, 2019
• First Posted (Actual): September 6, 2019

Study Record Updates

• Last Update Posted (Actual): March 15, 2023
• Last Update Submitted That Met QC Criteria: March 13, 2023
• Last Verified: March 1, 2023

More Information

Terms related to this study

• Keywords: Cobimetinib; Langerhans Cell Histiocytosis (LCH)
• Additional Relevant MeSH Terms: Nervous System Diseases; Skin Diseases; Respiratory Tract Diseases; Neoplasms by Histologic Type; Neoplasms; Lymphatic Diseases; Lung Diseases; Lung Diseases, Interstitial; Histiocytosis, Non-Langerhans-Cell; Neurodegenerative Diseases; Histiocytosis, Langerhans-Cell; Histiocytosis; Histiocytic Sarcoma; Xanthogranuloma, Juvenile; Erdheim-Chester Disease; Histiocytic Disorders, Malignant; Histiocytosis, Sinus
• Other Study ID Numbers: H-43475 NACHO COBI

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No