Recruiting
Phase 2

Mirdametinib

Sponsor:

National Cancer Institute (NCI)

Code:

NCT07061951

Conditions

Recurrent Chronic Lymphocytic Leukemia

Recurrent Small Lymphocytic Lymphoma

Refractory Chronic Lymphocytic Leukemia

Refractory Small Lymphocytic Lymphoma

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Interventions

Biospecimen Collection

Bone Marrow Biopsy

Computed Tomography

Echocardiography Test

Mirdametinib

Study Details

Brief summary:

This phase II trial tests the effect of mirdametinib in treating patients with chronic lymphocytic leukemia (CLL) or small lymphocytic lymphoma (SLL) that has come back after a period of improvement (relapsed) or that has not responded to previous treatment (refractory). Mirdametinib, a methyl ethyl ketone (MEK) inhibitor, works by blocking the action of an abnormal protein that signals cancer cells to multiply. This may help slow or stop the spread of cancer cells. Giving mirdametinib may be effective in treating patients with relapsed or refractory CLL or SLL.

Conditions

Recurrent Chronic Lymphocytic Leukemia

Recurrent Small Lymphocytic Lymphoma

Refractory Chronic Lymphocytic Leukemia

Refractory Small Lymphocytic Lymphoma

Study ID

NCT07061951

Start date

May 27, 2026

Status verified date

May, 2026

Completion date

Feb 1, 2030

Anticipated

Primary completion date

Feb 1, 2030

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18+

Healthy Volunteers: Not accepted

Inclusion Criteria:

  • Patients must have histologically or cytologically confirmed CLL or small lymphocytic lymphoma (SLL), as documented by a history at some point in time of an absolute peripheral blood B cell count > 5000/mcL with a monoclonal B cell population coexpressing CD19, CD5, and CD23, or if CD23 negative, then documentation of the absence of t(11;14) or cyclin D1 overexpression. Alternatively, patients with lymphadenopathy in the absence of circulating disease will also be eligible for this study if lymph node biopsy or bone marrow biopsy has established the diagnosis of CLL with the above immunophenotype
  • Patients must have a current indication for treatment as defined by the iwCLL 2018 Guidelines (Hallek et al., 2018):

  • Massive or progressive splenomegaly; OR
  • Massive lymph nodes, nodal clusters, or progressive lymphadenopathy; OR
  • Grade 2 or 3 fatigue; OR
  • Fever ≥ 100.5°F or night sweats for greater than 2 weeks without documented infection; OR
  • Presence of weight loss ≥ 10% over the preceding 6 months; OR
  • Progressive lymphocytosis with an increase of ≥ 50% over a 2-month period or an anticipated doubling time of less than 6 months; OR
  • Evidence of progressive marrow failure as manifested by the development of or worsening of anemia and or thrombocytopenia
  • Patients must have measurable disease, defined as lymphocytosis > 5,000/mcL, palpable or computed tomography (CT) measurable lymphadenopathy > 1.5 cm, or bone marrow involvement > 30%
  • Patients must have received at least two prior therapies for CLL including systemic therapy containing a Bruton's tyrosine kinase (BTK) inhibitor and a BCL2 inhibitor. Patients are required to have prior BTK inhibitor-based therapy because constitutive extracellular signal-regulated kinase (ERK) activation is seen in all patients with progression after BTK inhibitor therapy
  • Age ≥ 18 years. Because CLL is extremely rare in persons < 18 years of age, children are excluded from this study
  • Eastern Cooperative Oncology Group (ECOG) performance status ≤ 2 (Karnofsky ≥ 60%)
  • Absolute neutrophil count ≥ 500/mcL. Growth factor is allowed to achieve this level. Neutrophil count of 250 is permitted for patients with bone marrow involvement

  • Unless they have significant bone marrow involvement of CLL confirmed on biopsy
  • Platelets ≥ 20,000/mcL independent of transfusion within 7 days of screening. Transfusion is permitted to support platelet count for patients with bone marrow involvement

  • Unless they have significant bone marrow involvement of CLL confirmed on biopsy
  • Total bilirubin ≤ 1.5 x institutional upper limit of normal (ULN) unless bilirubin rise is due to Gilbert's syndrome, autoimmune hemolytic anemia,(AIHA), or of non-hepatic origin
  • Aspartate aminotransferase (AST) (serum glutamic oxaloacetic transaminase \[SGOT\])/alanine aminotransferase (ALT) (serum glutamic pyruvic transaminase \[SGPT\]) ≤ 3 x institutional ULN
  • Glomerular filtration rate (GFR) 50 ml/min estimated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) (Levey et al., 2009)
  • Human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial
  • For patients with evidence of chronic hepatitis B virus (HBV) infection, the HBV viral load must be undetectable on suppressive therapy, if indicated
  • Patients with a history of hepatitis C virus (HCV) infection must have been treated and cured. For patients with HCV infection who are currently on treatment, they are eligible if they have an undetectable HCV viral load
  • Patients with treated brain metastases are eligible if follow-up brain imaging after central nervous system (CNS)-directed therapy shows no evidence of progression
  • Patients with new or progressive brain metastases (active brain metastases) or leptomeningeal disease are eligible if the treating physician determines that immediate CNS specific treatment is not required and is unlikely to be required during the first cycle of therapy
  • Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial
  • Patients with known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Functional Classification. To be eligible for this trial, patients should be class II or better
  • The effects of mirdametinib on the developing human fetus are unknown. For this reason, women of child-bearing potential and men must agree to use highly effective contraception (hormonal and barrier method of birth control; abstinence) prior to study entry and for the duration of study participation. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately. Women of child-bearing potential should also use adequate contraception for 6 months after completion of mirdametinib administration. Men treated or enrolled on this protocol must also agree to use adequate contraception prior to the study, for the duration of study participation, and 3 months after completion of mirdametinib administration. Women of childbearing age should not donate egg(s) and men should not donate sperm for the duration of study participation and 3 months after completion of mirdametinib administration

Exclusion Criteria:

  • Patients who have not recovered from adverse events due to prior anti-cancer therapy (i.e., have residual toxicities > grade 1) with the exception of alopecia
  • Patients who are receiving any other investigational agents
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to mirdametinib
  • Patients with concurrent administration of strong inhibitors and inducers of P-glycoprotein (P-g)p or breast cancer specific resistance protein (BCRP). If discontinuation of the medication is appropriate, a washout duration of approximately 3 to 5 half-lives is recommended prior to the first dose of mirdametinib
  • Patients with concurrent administration of strong CYP3A4 inducers. If discontinuation of the medication is appropriate, a washout duration of approximately 3 to 5 half-lives is recommended prior to the first dose of mirdametinib
  • Patients with uncontrolled intercurrent illness or any other significant condition(s) that would make participation in this protocol unreasonably hazardous
  • Pregnant women are excluded from this study because mirdametinib is MEK inhibitor agent with the potential for teratogenic or abortifacient effects. Because there is an unknown but potential risk for adverse events in nursing infants secondary to treatment of the mother mirdametinib, breastfeeding should be discontinued if the mother is treated with mirdametinib
  • Patients with active infection requiring intravenous (IV) antibiotics
  • History or current evidence of glaucoma or clinically significant abnormalities on the ophthalmological exam, including but not limited to cataract limiting the ability to examine the retina or any optical coherence tomography (OCT) finding that could be a significant risk factor for retinal vein occlusion (RVO), retinopathy, or neovascular macular degeneration
  • Patients with corrected QT (QTc) > 470 ms

Study Design

Enrollment

20 participants

Anticipated

Intervention Model

Single group

Primary purpose

Treatment

Interventions and Outcome Measures

Arms

experimental: Treatment (mirdametinib)

Patients receive mirdametinib PO BID on days 1-28 of each cycle. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity. Additionally, patients undergo bone marrow biopsy, blood sample collection, echocardiography, and CT throughout the study.

Interventions

Biospecimen Collection

Undergo blood sample collection

Bone Marrow Biopsy

Undergo bone marrow biopsy

Computed Tomography

Undergo CT

Echocardiography Test

Undergo echocardiography

Mirdametinib

Given PO

Primary outcome measure

  • Best objective response rate [ Time Frame: Up to 5 years ]

Central Contacts and Locations

Locations

City of Hope Comprehensive Cancer Center

Recruiting

Duarte, California, United States, 91010

Contacts

Site Public Contact

800-826-4673becomingapatient@coh.org

Principal Investigator:

Benjamin M. Heyman

City of Hope at Irvine Lennar

Recruiting

Irvine, California, United States, 92618

Contacts

Site Public Contact

877-467-3411

Principal Investigator:

Benjamin M. Heyman

University of California Davis Comprehensive Cancer Center

Recruiting

Sacramento, California, United States, 95817

Contacts

Site Public Contact

916-734-3089

Principal Investigator:

Sheila Firoozan

Dana-Farber Cancer Institute

Recruiting

Boston, Massachusetts, United States, 02215

Contacts

Site Public Contact

877-442-3324

Principal Investigator:

Jennifer R. Brown

UNC Lineberger Comprehensive Cancer Center

Recruiting

Chapel Hill, North Carolina, United States, 27599

Contacts

Site Public Contact

877-668-0683cancerclinicaltrials@med.unc.edu

Principal Investigator:

Christopher E. Jensen

Ohio State University Comprehensive Cancer Center

Recruiting

Columbus, Ohio, United States, 43210

Contacts

Site Public Contact

800-293-5066Jamesline@osumc.edu

Principal Investigator:

Kerry A. Rogers

UPMC Hillman Cancer Center

Recruiting

Pittsburgh, Pennsylvania, United States, 15232

Contacts

Site Public Contact

412-647-8073

Principal Investigator:

John C. Byrd

Huntsman Cancer Institute/University of Utah

Recruiting

Salt Lake City, Utah, United States, 84112

Contacts

Site Public Contact

888-424-2100cancerinfo@hci.utah.edu

Principal Investigator:

Margaret K. Baron

More Information

Sponsor

National Cancer Institute (NCI)

Last update posted

Aug 27, 2026

Last verified

May, 2026

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-08. This information was provided to ClinicalTrials.gov by National Cancer Institute (NCI) on 2026-08-27.