On November 1, 2018 Nordic Nanovector ASA (OSE: NANO) reported that an abstract reporting updated results from its LYMRIT 37-01 Phase 1/2 clinical study of Betalutin (177Lu-satetraxetan-lilotomab) in patients with relapsed/refractory indolent non-Hodgkin’s lymphoma (iNHL) has been published ahead of its presentation in a poster at the 60th American Society of Hematology (ASH) (Free ASH Whitepaper) Annual Meeting & Exposition (1-4 December 2018 in San Diego, CA, USA) (Press release, Nordic Nanovector, NOV 1, 2018, View Source [SID1234553490]).

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The published dataset (as of 22 June 2018) includes 74 evaluable patients; all patients received Betalutin as a single administration and have six or more months of follow-up. The complete dataset will be presented at ASH (Free ASH Whitepaper).

The conclusions from the updated study results are that Betalutin is well-tolerated and has promising anti-tumour activity in recurrent iNHL, especially in follicular lymphoma (FL) patients. Key results are:

Patients Number of patients (n) Overall Response Rate (ORR) Complete Responses (CR)
All iNHL patients 74 61 % 26 %
FL patients 57 65 % 24 %
3L FL patients (≥2 prior therapies) 37 70 % 27 %
FL patients in Arm 1
(40 mg lilotomab followed by 15 MBq/kg Betalutin) 25 64 % 28 %
FL patients in Arm 4
(100 mg/m2 lilotomab followed by 20 MBq/kg Betalutin) 16 69 % 19 %
The median duration of response (mDoR), when treated with a single administration of Betalutin, was 13.3 months for all patients (20.5 months for those with a CR) based on a median follow-up of 9.1 months (range 4.9-49.5 months). Twenty-six patients (35%) have remained free of disease progression for more than 12 months.

Betalutin therapy was well tolerated with no unexpected safety findings and the safety profile is both predictable and manageable.

The data continue to highlight the encouraging clinical profile of single-agent Betalutin therapy in iNHL patients, particularly in those with FL, the primary NHL population for which Betalutin is being developed.

Two recommended Phase 2 doses were identified from this study and are now being compared in the pivotal, randomised Phase 2b PARADIGME trial in relapsed, anti-CD20 refractory FL patients who have received two or more prior therapies.

Arne Kolstad, lead investigator of LYMRIT 37-01 and senior consultant in medical oncology and radiotherapy, Oslo University Hospital Radiumhospitalet, said: "Patients with relapsed/refractory follicular lymphoma have a need for effective treatment options that improve their quality of life, especially elderly patients. The clinical profile that Betalutin is consistently showing in this patient population is very encouraging."

Lisa Rojkjaer, Chief Medical Officer of Nordic Nanovector, commented: "We are very pleased with the clinical data. The results from Arm 4 further support the decision to compare the 100 mg/m2 lilotomab + 20 MBq/kg Betalutin dosing regimen from Arm 4 with the 40 mg lilotomab + 15 MBq/kg regimen from Arm 1 in the pivotal phase 2b PARADIGME trial. The emerging data on the durability of the responses together with the safety profile of Betalutin and the convenience of a single administration underscore the potential of Betalutin for the treatment of patients with advanced-stage follicular lymphoma."

Poster details

Abstract 2879

Abstract title: LYMRIT 37-01: A phase I/II study of 177Lu-lilotomab satetraxetan (Betalutin) antibody-radionuclide-conjugate (ARC) for the treatment of relapsed non-Hodgkin’s lymphoma (NHL) – Analysis with 6-month follow-up

Authors: A. Kolstad, A et al.

Session Name: 623. Mantle Cell, Follicular, and Other Indolent B-Cell Lymphoma—Clinical Studies: Poster II

Date: Sunday, 2 December 2018

Presentation Time: 6:00 PM – 8:00 PM Pacific time

Location: San Diego Convention Center, Hall GH

The abstract is available at View Source and the poster will be published on the Nordic Nanovector website to coincide with the session.

About ASH (Free ASH Whitepaper)

The ASH (Free ASH Whitepaper) annual meeting is the premier event for scientific exchange in the field of haematology, attracting more than 20,000 attendees from all over the world. Typically, more than 5,000 scientific abstracts are submitted each year, and more than 3,000 abstracts are accepted for oral and poster presentations through an extensive peer review process.

About LYMRIT 37-01

LYMRIT 37-01 is a Phase 1/2 dose-escalation study to determine the safety, pharmacokinetics and preliminary efficacy of a single dose of Betalutin in patients with relapsed iNHL, and to establish a recommended Phase 2 dose for the global, randomised Phase 2b PARADIGME trial.

LYMRIT 37-01 recruited 74 pts [57 follicular (FL), 7 mantle cell (MCL), 9 marginal zone (MZL), 1 small lymphocytic (SLL)] at 13 sites between December 2012 and February 2018. Median age was 68 years (range 38-87; 55% ≥ 65); the median number of prior therapies was 3 (range 1-9); 48 pts (65%) received 2 or more prior therapies.