Patients with AL Amyloidosis MedDRA version: 20.0 Level: PT Classification code 10002022 Term: Amyloidosis System Organ Class: 10021428 - Immune system disorders
Conditions
Sponsors
Oncopeptides AB
Eligibility
Sex/Gender
All
Inclusion criteria
Inclusion criteria: 1. Male or female, age 18 years or older at the time of signing the informed consent. 2. Proven histochemical diagnosis of AL amyloidosis based on tissue specimens with Congo red staining with exhibition of an apple-green birefringence confirmed with appropriate method of typing, e.g. mass spectrometry, immunofluorescence or immunohistochemistry (previous aspirate/biopsy tissue specimen result acceptable). 3. At least one prior line of therapy, defined as either one non-transplant regimen, one ASCT, or one regimen of induction therapy followed by a single ASCT (without hematologic progression between induction and ASCT). No more than 4 cycles of melphalan containing chemotherapy is allowed. 4. Measurable hematologic disease as defined by serum differential free light chain (dFLC) concentration = 20 mg/L (dFLC is the difference between amyloid forming [involved] and non-amyloid forming [uninvolved] FLC). 5. Objectively measurable (cardiac, and/or renal and/or liver) organ amyloid involvement, as defined below (amyloid involvement of at least 1 required). See also Appendix 9: a. Cardiac involvement: mean wall thickness >12 mm on echocardiogram, with no other cardiac cause or an elevated NT-ProBNP (>332 ng/L) in the absence of renal failure or atrial fibrillation. b. Renal involvement is defined as proteinuria (predominantly albumin) >0.5 g/day in a 24-hour urine collection. c. Hepatic involvement: Total liver span >15 cm in the absence of heart failure, or alkaline phosphatase >1.5 times institutional upper limit of normal (ULN). Amyloid involvement of other organ systems is allowed, but not required. 6. ECOG performance status = 2. See Appendix 5. 7. Women of child bearing potential (WOCBP) must have a negative serum or urine pregnancy test (See Appendix 4). 8. Ability to understand the purpose and risks of the study and provide signed and dated informed consent and authorization to use protected health information. 9. Less than 30% plasma cells in bone marrow aspirate or biopsy. 10. 12-lead screening ECG with QRS < 120 msec, PR < 220 msec and QTcF interval of = 470 msec calculated by Fridericia Formula (Appendix 12). 11. Echocardiogram (ECHO) with left ventricular ejection fraction (LVEF) = 45%. 12. The following laboratory results must be met: • Absolute neutrophil count (ANC) = 1,500 cells/mm3 (1.5 x 109/L) (Growth factors cannot be used within 10 days (14 days for pegfilgrastim) prior to initiation of therapy) • Platelet count = 100,000 cells/mm3 (100 x 109/L) without required transfusions during the 10 days prior to initiation of therapy). • Hemoglobin = 9.0 g/dl (RBC transfusions are permitted). • Total Bilirubin = 1.5 x ULN. Higher value may be accepted in participants diagnosed with Gilbert syndrome, if approved by the medical monitor. • Alkaline phosphatase = 3.5 x ULN. • AST and ALT = 1.5 x ULN. • Renal function: Estimated GFR (eGFR) by CKD-EPI formula = 45 mL/min (Appendix 11). A lower value may be acceptable after consultation and approval of the medical monitor. 13. Male participant agrees to use contraception as detailed in Appendix 4 of this protocol during the treatment period and for at least 90 days after the last dose of melflufen and refrain from donating sperm during this period. OR Female participant meets one of the following conditions: i. Not of child bearing potential as defined in Appendix 4 ii. Not currently pregnant or breastfeeding and agrees to follow the contraceptive gui
Exclusion criteria
Exclusion criteria: 1. Amyloidosis due to known mutations of the transthyretin gene or presence of another non-AL amyloidosis. 2. Evidence of gastro-intestinal bleeding • Frank bleeding within 6 months prior to initiation of therapy. • Positive feces-hemoglobin/ fecal occult blood test within 6 months prior to initiation of therapy if clinically relevant. In case of a positive test within the last 6 months, a colonoscopy is required to exclude clinically relevant conditions. 3. Cardiac risk stage 3 with NT-pro-BNP >5000 pg/mL (Appendix 7). 4. Low platelets values with evidence of mucosal or internal bleeding and/or are platelet transfusion refractory (i.e. unable to maintain a platelet count =100,000 cells/mm3 [100 x 109/L]). 5. Medically documented cardiac syncope, NYHA (Appendix 8) Class 3 or 4 congestive heart failure, myocardial infarction within the previous 6 months, unstable angina pectoris, clinically significant ventricular arrhythmias, or atrioventricular (AV) block 6. Clinically significant finding on 24 h Holter recording performed at screening, including but not limited to AV block (with the exception of Mobitz type I that is permitted), intermittent bundle branch block, ventricular arrythmias and sign of sick sinus syndrome. 7. Severe (symptomatic) orthostatic hypotension (a decrease in systolic blood pressure of 20 mm Hg or a decrease in diastolic blood pressure of 10 mm Hg within 3 minutes of standing compared with blood pressure from the supine position. See Section 8.3.2 for details on the assessment of orthostatic hypotension) 8. Clinically significant factor X deficiency (in investigator’s opinion) 9. Clinically important autonomic disease (in investigator’s opinion) 10. Any medical conditions that, in the Investigator’s opinion, would impose excessive risk to the patient or would adversely affect his/her participating in this study. 11. Known active infection requiring parenteral or oral anti-infective treatment within 14 days of initiation of treatment. Other wash out period may be considered after consultation and approval of the medical monitor. 12. Other malignancy diagnosed or requiring treatment within the past 3 years with the exception of adequately treated basal cell carcinoma, squamous cell skin cancer, carcinoma in-situ of the cervix or breast, and very-low and low risk prostate cancer in active surveillance as defined in NCCN Guideline: Prostate Cancer (NCCN 2019). 13. Pregnant or breast-feeding females. 14. Serious psychiatric illness, active alcoholism, or drug addiction that may hinder or confuse compliance or follow-up evaluation. 15. Known HIV or active hepatitis B or C viral infection. 16. Concurrent symptomatic multiple myeloma (symptomatic defined as presence of bone lesion, extramedullary plasmacytoma or hypercalcemia (Rajkumar et al. 2014)) 17. POEMS syndrome [plasma cell dyscrasia with polyneuropathy, organomegaly, endocrinopathy, monoclonal protein (M-protein) and skin changes]. 18. Previous cytotoxic therapies, including cytotoxic investigational agents, within 3 weeks (6 weeks for nitrosoureas) prior to start of study treatment (Prednisone up to, but no more than, 10 mg orally q.d. or its equivalent for symptom management of comorbid conditions is permitted, but dose should be stable for at least 7 days prior to study treatment). Monoclonal antibodies (mAbs) within 4 weeks. Concomitant immunotherapy, investigational therapy, and anticoagulation therapy are not permitted (low dose
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Main Objective: Phase 1 •To explore the safety and tolerability •To identify recommended Phase 2 dose (RP2D). Phase 2 •To evaluate the hematologic ORR after 4 cycles at the RP2D determined in Phase 1;Secondary Objective: Phase 1 •To assess pharmacokinetic profile of melflufen in this patient population •To assess best hematologic response •To assess duration of hematologic response •To assess the proportion of organ system responses •To assess duration of organ system responses •To assess hematologic ORR •To assess time to next AL amyloidosis treatment •To assess OS Phase 2 •To assess safety and tolerability •To assess best hematologic response •To assess duration of hematologic response •To assess the proportion of organ system responses •To assess duration of organ system responses •To assess time to next AL amyloidosis treatment •To assess OS Exploratory •To assess MRD;Primary end point(s): Phase 1 • Frequency and grade of adverse events (AE) and laboratory values • Dose-Limiting Toxicity (DLT) during Cycle 1 up to a maximum dose of melflufen of 40 mg Phase 2 • The proportion of participants who achieve a hematologic Complete Response (CR), Very Good Partial Response (VGPR), or Partial Response (PR);Timepoint(s) of evaluation of this end point: During the course of the study | — |
Secondary
| Measure | Time frame |
|---|---|
| Secondary end point(s): Phase 1 • Melphalan plasma concentration post melflufen administration • Best hematologic response (CR, VGPR, PR, NR, or PD) • Duration of hematologic response (CR, VGPR, PR) • Proportion of participants with kidney, cardiac or liver response, respectively • Duration of organ system specific responses (separately for kidney, cardiac, and liver) • The proportion of participants who achieve a hematologic CR, VGPR, or PR • Time to next AL amyloidosis treatment • OS Phase 2 • Frequency and grade of AEs and laboratory values • Best hematologic response (CR, VGPR, PR, NR, or PD) • Duration of hematologic response (CR, VGPR, PR) • Proportion of participants with kidney, cardiac or liver response, respectively • Duration of organ system specific responses (separately for kidney, cardiac, and liver) • Time to next AL amyloidosis treatment • OS;Timepoint(s) of evaluation of this end point: During the course of the study | — |
Countries
Czech Republic, France, Germany, Greece, Israel, Italy, Norway, Poland, Spain, United Kingdom, United States
Contacts
Public ContactClinical Trials Information Desk
Oncopeptides AB
Outcome results
None listed