Ribociclib in Combination With Everolimus and Dexamethasone in Relapsed ALL

  • End date
    Sep 1, 2023
  • participants needed
  • sponsor
    Dana-Farber Cancer Institute
Updated on 6 August 2021


This research study is evaluating a drug called ribociclib (LEE011) given in combination with everolimus and other standard of care chemotherapy drugs as a possible treatment for relapsed or refractory ALL.

The names of the drugs involved in this study are:

  • ribociclib
  • everolimus
  • dexamethasone


This research study is a Phase I clinical trial, which tests the safety of an investigational drug or a combination of drugs. Phase I studies try to define the appropriate dose of the investigational drug to use for further studies. "Investigational" means that the drug and the combination of drugs are still being studied.

The FDA (the U.S. Food and Drug Administration) has not approved the study drugs, ribociclib or everolimus, for relapsed ALL, but these drugs have been approved for other uses.

Ribociclib is a chemotherapy drug that is approved by the FDA for the treatment of certain types of breast cancer. It has also been studied in children and adults with other types of cancer. Information from these research studies has suggested that ribociclib may also be effective in treating participants with leukemia that did not respond to standard treatment or participants with leukemia that has come back after standard treatment.

The growth and survival of leukemia cells is controlled by proteins within the cancer cell. The study drug, ribociclib, blocks a specific type of protein called a cyclin-dependent kinases (CDK). Laboratory and other studies suggest that when ribociclib blocks CDKs, cancer cells stop growing.

Everolimus is a chemotherapy drug that is approved by the FDA for the treatment of breast cancer, neuroendocrine tumor and kidney cancer. Laboratory and other studies suggest that everolimus may prevent leukemia cell growth and also that it has been shown to increase the effectiveness of other chemotherapy drugs, including ribociclib. It has been studied in hundreds of people with various types of cancer as a single agent (a drug that is used alone to treat the cancer) or in combination with a number of other drugs.

The drug combination of ribociclib and everolimus has not been previously tested in children, though these agents have been used together in adults with breast cancer.

In this research study the investigators are looking to learn more about how ribociclib and everolimus work in combination with other standard of care drugs commonly used to treat relapsed/refractory leukemia. The main goals of the study are:

  • To evaluate the side effects (good and/or bad) of giving ribociclib in combination with other standard of care drugs.
  • To determine the highest dose of ribociclib and everolimus that can be given safely in combination with other standard of care drugs.
  • To determine the amount of ribociclib and everolimus in the blood when it is given in combination with other standard of care drugs.

Condition Acute Lymphoblastic Leukemia ALL
Treatment Everolimus, Dexamethasone, Ribociclib
Clinical Study IdentifierNCT03740334
SponsorDana-Farber Cancer Institute
Last Modified on6 August 2021


Yes No Not Sure

Inclusion Criteria

Age > 12 months (365 days) and 30 years
Histologically confirmed diagnosis of either 1) relapsed or refractory ALL or 2) CML in lymphoid blast crisis (must have failed at least 2 lines of TKI therapy)
Primary refractory disease: Persistent disease after at least two induction attempts
Relapsed disease: Second or subsequent relapse, or any relapse refractory to salvage chemotherapy
Participants must have bone marrow with 1% lymphoblasts definitively identified either on a bone marrow aspirate or biopsy sample, as assessed by morphology, immunohistochemical studies, flow cytometry, karyotype, cytogenetic testing such as fluorescent in situ hybridization (FISH) or other molecular studies
Participants with CNS1 or CNS2 disease are eligible. Patients with isolated CNS relapse or CNS 3 disease are not eligible. (Refer to Section 12.4 for definitions of CNS status)
Participants must have fully recovered from the acute toxic effects of all prior chemotherapy, immunotherapy, or radiotherapy prior to entering this study and meet all of the following criteria
Corticosteroids: 14 days must have elapsed since the completion of systemic corticosteroid administration. The following uses of corticosteroids are permitted: single doses (e.g., during anesthesia), topical applications (e.g., for rash), inhaled sprays (e.g., for obstructive airway diseases, asthma), eye drops or local injections (e.g., intra-articular)
Myelosuppressive chemotherapy: 14 days must have elapsed since the completion of myelosuppressive therapy. Individuals may have received any of the following medications within 14 days without a "wash-out" period
Standard maintenance therapy, other than corticosteroids (vincristine, 6MP, low dose methotrexate)
Intrathecal chemotherapy with methotrexate, hydrocortisone and/or cytarabine
Radiation therapy (XRT)
Total Body Irradiation (TBI) or cranial radiation therapy: Must have been completed more than 90 days prior to study entry
XRT for chloroma does not require a washout period
Palliative XRT does not require a washout
Small molecule inhibitors (BCR-ABL or FLT3 inhibitors, for example): 7 days must have elapsed since the completion of therapy. For agents that have known adverse events occurring beyond 7 days after administration, this period must be extended beyond the time during which adverse events are known to occur. The duration of this interval must be discussed with the Study Chair
Immunotherapy: At least 6 weeks after the administration of any type of immunotherapy, including, but not limited to, tumor vaccines, chimeric antigen receptor (CAR) therapy, other immune effector cell therapy or checkpoint inhibitors
Monoclonal antibodies: At least 3 half-lives of the antibody after the last dose of a monoclonal antibody. (See table on DVL homepage listing monoclonal antibody half-lives: <https://members.childrensoncologygroup>)
Prior hematopoietic stem cell transplant (HSCT): Patients who have received HSCT are eligible, but must meet all of the following conditions
Autologous HSCT > 60 days of study entry
Allogeneic HSCT > 90 days of study entry
No evidence of graft-versus-host-disease (GVHD)
Weaning or stable doses of calcineurin inhibitors are permitted provided there is no evidence of active GVHD
Participants must have a body surface area (BSA) 0.4 m2
Performance status
\--Lansky > 50 for individuals < 16 years old; Karnofsky > 50% for individuals
years old (See Appendix A)
Participants must have adequate organ function as defined by the following laboratory
Direct bilirubin 1.5 X institutional upper limit of normal (ULN)
Alanine aminotransferase (ALT) < 3 x ULN for age and aspartate aminotransferase (AST) < 3 x ULN for age. Patients with leukemic infiltration of the liver must have AST and ALT < 5 x ULN for age
Creatinine below institutional ULN or creatinine clearance > 60 mL/min/1.73 m2 for subjects with creatinine levels above institutional normal
Echocardiogram ejection fraction 50%. Echocardiogram must be obtained while patient is not receiving cardiotropic medications (e.g., pressors or afterload reducers)
QTcF < 450 ms on screening ECG
Oxygen saturation 90% by pulse oximetry without administration of supplemental oxygen
Female patients of childbearing potential must have a negative urine or serum pregnancy test confirmed prior to enrollment
Female patients with infants must agree not to breastfeed their infants while on this study
Women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control; abstinence) prior to study entry, for the duration of study participation, and for 21 days after the last dose of the study drug. Should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately
Ability to understand and/or the willingness of the patient (or parent or legally authorized representative, if minor) to provide informed consent, documented using an institutionally approved informed consent procedure

Exclusion Criteria

Impairment of gastrointestinal (GI) function or GI disease that may significantly alter the absorption of ribociclib, everolimus or dexamethasone (e.g., ulcerative diseases, uncontrolled nausea, vomiting, diarrhea, malabsorption syndrome, or small bowel resection)
Individuals with CNS 3 leukemia at time of study entry. History of CNS 3 disease is allowable as long as patient meets eligibility criteria (CNS 1 or 2) at time of enrollment
Individuals with Down syndrome
Treatment with hematopoietic growth factors (G-CSF)
Long-acting (e.g., Neulasta) within 14 days prior to study entry
Short-acting (e.g., Neupogen) within 7 days prior to study entry
Treatment with an investigational agent within 28 days of study entry, or 3 half-lives, whichever is longer
Patients will be excluded if there is a plan to administer non-protocol chemotherapy, radiation therapy, or immunotherapy during the study period
Clinically significant, uncontrolled heart disease and/or cardiac repolarization abnormalities, including any of the following
History of acute coronary syndromes (including myocardial infarction, unstable angina, coronary artery bypass grafting, coronary angioplasty, or stenting) or symptomatic pericarditis within 6 months prior to screening
History of documented congestive heart failure (New York Heart Association functional classification III-IV)
Clinically significant cardiac arrhythmias (e.g. ventricular tachycardia), complete left bundle branch block, high-grade AV block (e.g. bifascicular block, Mobitz type II and third-degree AV block)
Long QT syndrome or family history of idiopathic sudden death or congenital long QT syndrome, or any of the following
Risk factors for Torsades de Pointe (TdP) including uncorrected hypokalemia or hypomagnesemia, history of cardiac failure or history of significant/symptomatic bradycardia
Concomitant use of medication(s) with a known risk to prolong the QT interval and/or known to cause Torsades de Pointe that cannot be discontinued (within 5 half-lives or 7 days prior to starting study drug) or replaced by safe alternative medication (See Appendix C for list of prohibited medications)
Inability to determine the QTcF interval on screening EKG (using Fridericia's correction)
Prior exposure to a CDK4/6 inhibitor
Patient is currently receiving any of the following medications and cannot be discontinued 7 days prior to starting study drug (see Appendix C for prohibited medications)
Known strong inducers or inhibitors of CYP3A4/5, including grapefruit, grapefruit hybrids, pummelos, star-fruit, and Seville oranges
Medications with a narrow therapeutic window that are predominantly metabolized through CYP3A4/5
Herbal preparations/medications, dietary supplements
Patients refractory to red blood cell or platelet transfusions
Patient is currently receiving warfarin or other coumarin-derived anticoagulant for treatment, prophylaxis or otherwise. Therapy with heparin, low molecular weight heparin (LMWH) or fondaparinux is allowed
Patients with systemic fungal, bacterial, viral or other infection that is exhibiting ongoing signs/symptoms related to the infection without improvement despite appropriate antibiotics or other treatment
Patients known to have human immunodeficiency virus (HIV) infection; baseline testing for HIV is not required
Patients known to have active hepatitis A, B, or C infection; or known to be positive for HCV RNA or HBsAg (HBV surface antigen); baseline testing for viral hepatitis is not required
Major surgery within 2 weeks of the first dose of study drugs. The following are not considered major surgery for the purposes of eligibility: Tumor biopsy, insertion of a gastric feeding tube, central venous access
Individuals with significant concurrent disease, illness, psychiatric disorder or social issue that would compromise patient safety or compliance, interfere with consent, study participation, follow up, or interpretation of study results
Individuals with a history of a different malignancy (other than ALL) are ineligible except for the following circumstances
Individuals are eligible if they have been disease-free for at least 5 years and are deemed by the investigator to be at low risk for recurrence of that malignancy
Individuals with the following cancers are eligible if diagnosed and treated within the past 5 years: cervical cancer in situ, and basal cell or squamous cell carcinoma of the skin
Pregnant or nursing women are excluded
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