Diffuse large B-cell lymphoma (DLBCL) is the most common of the non-Hodgkin's lymphomas.
Whilst the majority of patients will respond well to conventional treatment (R-CHOP -
rituximab, cyclophosphamide, doxorubicin, vincristine and prednisolone), a significant number
of patients lymphoma will not respond to initial therapy or their disease will return after
completion of therapy. In a number of B-cell diseases an enzyme called, Bruton tyrosine
kinase (BTK) prevents death of tumour cells, including in DLBCL. Acalabrutinib is an orally
active BTK-inhibitor and it is thought that stopping BTK being activated may help in treating
B-cell diseases. It is hypothesised that the addition of Acalabrutinib to standard R-CHOP
immunochemotherapy may improve outcomes of patients with DLBCL.
REMoDL-A is a randomised, phase II, open label, multicentre study that will be open in up to
50 centres. Up to 553 patients (453 randomised) will be recruited.
Following informed consent all patients will receive 1 cycle of conventional R-CHOP
chemotherapy. At the same time the diagnostic pathology block will be sent for molecular
profiling by the Haematological Malignancy Diagnostic Service (HMDS). The delivery of the
first cycle of R-CHOP will allow a sufficient interval for real time determination of
molecular phenotype. Patients whose biopsies yield sufficient tumour material for profiling
will be randomised 2:1 in favour of the experimental arm (R-CHOP + acalabrutinib).
The primary objective will be to establish if combining acalabrutinib with R-CHOP improves
efficacy, compared to R-CHOP alone, for the treatment of previously untreated patients with
DLBCL to a degree that justifies further development of this approach.
Inclusion Criteria:
- Histologically confirmed DLBCL, expressing CD20. Sufficient diagnostic material must
be available to forward to HMDS for gene expression profiling and central pathology
review. The following diagnoses by 2016 WHO classification of lymphoid neoplasms may
be included:
- DLBCL, not otherwise specified (NOS)
- T-cell/histiocyte-rich large B-cell lymphoma
- Epstein-Barr virus positive DLBCL, NOS
- ALK-positive large B-cell lymphoma
- HHV8-positive DLBCL, NOS
- High-grade B-cell lymphoma with MYC and BCL2 and/or BCL6 rearrangements
(double-hit or triple-hit lymphoma)
- High-grade B-cell lymphoma, NOS
- At least one bi-dimensionally measurable lesion, defined as >1.5 cm in its longest
dimension as measured by CT.
- Not previously treated for lymphoma and fit enough to receive combination
chemoimmunotherapy with curative intent.
- Stage IAX (bulk defined as lymph node mass [either single or conglomerate] diameter
>7.5cm) to stage IV disease and deemed to require a full course of chemotherapy.
Patients with non-bulky IE disease will not be eligible.
- ECOG performance status 0-2 or 3 if this is directly attributable to lymphoma.
- Adequate bone marrow function with platelets > 100x109/L; neutrophils > 1.0x109/L at
study entry, unless lower figures are attributable to lymphoma.
- Measured or calculated creatinine clearance > 30mls/min, (calculated using the formula
of Cockcroft and Gault [(140-Age) x Mass (kg) x (1.04 (for women) or 1.23 (for
men))/Serum Creatinine (μmolL)]).
- Serum bilirubin < 35μmol/L and transaminases < 1.5x upper limit of normal at time of
study entry.
- Cardiac function sufficient to tolerate 300mg/m2 of doxorubicin. A pre-treatment
echocardiogram or MUGA is required to establish baseline LVEF equal to or greater than
institutional normal range.
- No concurrent uncontrolled medical condition.
- Life expectancy > 3 months.
- Aged 16 years or above.
- Willing and able to participate in all required evaluations and procedures in this
study protocol including swallowing capsules without difficulty.
- Ability to understand the purpose and risks of the study and provide signed and dated
informed consent.
Exclusion Criteria:
- Previous history of treated or untreated indolent lymphoma. However newly diagnosed
patients with DLBCL who are found to also have small cell infiltration of the bone
marrow or other diagnostic material (discordant lymphoma) will be eligible.
- Patients who have received immunisation with a live vaccine within four weeks prior to
enrolment will be ineligible.
- Diagnosis of primary mediastinal lymphoma.
- Diagnosis of primary Central Nervous System lymphoma or secondary CNS involvement.
Those patients presenting with neurological symptoms should be investigated for CNS
involvement. Routine CNS imaging or diagnostic lumbar puncture will not be required in
the absence of symptoms.
- History of stroke or intracranial haemorrhage in preceding 6 months.
- History of bleeding diathesis (eg, haemophilia, von Willebrand disease).
- History of drug-specific hypersensitivity or anaphylaxis to any study drug (including
active product or excipient components).
- Requires or receiving anticoagulation with warfarin or equivalent antagonists (eg,
phenprocoumon) within 7 days of first dose of acalabrutinib. However patients using
therapeutic low molecule weight heparin or low dose aspirin will be eligible as will
those receiving direct oral anticoagulants.
- Prior exposure to an inhibitor in the BCR pathway (eg, Btk inhibitors,
phosphoinositide-3 kinase (PI3K), or Syk inhibitors) or BCL-2 inhibitor (eg, ABT-199).
- Requires treatment with a strong cytochrome P450 3A4 (CYP3A4) inhibitor/inducer.
- Requires treatment with proton pump inhibitors (eg, omeprazole, esomeprazole,
lansoprazole, dexlansoprazole, rabeprazole, or pantoprazole). Patients receiving
proton pump inhibitors should switch to short-acting H2-receptor antagonists or
antacids prior to study entry to be eligible for enrolment into this study.
- Active significant infection (e.g. progressive multifocal leukoencephalopathy (PML)).
- Uncontrolled autoimmune haemolytic anaemia (AIHA) or idiopathic thrombocytopenic
purpura (ITP).
- Major surgery in the preceding 4 weeks of first dose of study drug. If a subject had
major surgery, they must have recovered adequately from any toxicity and/or
complications from the intervention before the first dose of study drug.
- Corticosteroid use >30 mg/day of prednisone or equivalent, for purposes other than for
lymphoma symptom control. Patients receiving corticosteroid treatment with <30 mg/day
of prednisone or equivalent must be documented to be on a stable dose of at least 4
weeks' duration prior to the start of Cycle 1. If glucocorticoid treatment is urgently
required for lymphoma symptom control prior to the start of study treatment,
prednisone 100 mg or equivalent could be given for a maximum of 14 days as a prephase.
A dose of up to 30mg or prednisolone or equivalent may be used during the screening
phase to control symptoms.
- Significant cardiovascular disease such as uncontrolled or symptomatic arrhythmias,
congestive heart failure, or myocardial infarction within 6 months of screening, or
any Class 3 or 4 cardiac disease as defined by the New York Heart Association
Functional Classification.
- Serological positivity for Hepatitis B, C, or known HIV infection. As per standard of
care, prior to initiation of immunochemotherapy, the results of hepatitis serology
should be known prior to commencement of therapy.
1. Positive test results for chronic HBV infection (defined as positive HBsAg
serology) will not be eligible. Patients with occult or prior HBV infection
(defined as negative HBsAg and positive total HBcAb) will not be eligible.
Patients who have protective titres of hepatitis B surface antibody (HBsAb) after
vaccination will be eligible.
2. Patients positive for HCV antibody are eligible only if polymerase chain reaction
(PCR) is negative for HCV RNA.
- Women who can bear children must agree to use two highly effective forms of
contraception or abstinence during the study and for 12 months after the last
treatment dose.
- Breastfeeding or pregnant women.
- Men who can father children must agree to use two highly effective forms of
contraception with additional barrier or abstinence during the study and for 12 months
after the last treatment dose.
- Men must agree to refrain from sperm donation during the study and for 12 months after
the last treatment dose.
- Serious medical or psychiatric illness likely to affect participation or that may
compromise the ability to give informed consent.
- Prior malignancy (other than DLBCL), except for adequately treated basal cell or
squamous cell skin cancer, in situ cervical cancer, or other cancer from which the
subject has been disease free for ≥ 2 years or which will not limit survival to < 2
years.
- Has difficulty with or is unable to swallow oral medication, or has significant
gastrointestinal disease, resection of the stomach or small bowel, partial or complete
bowel obstruction or gastric restrictions and bariatric surgery, such as gastric
bypass that would limit absorption of oral medication.
- Any immunotherapy within 4 weeks of 1st dose of the study.
- Concurrent participation in another therapeutic clinical trial.
