On November 18, 2019 MorphoSys AG (Prime Sector Segment, MDAX & TecDAX, NASDAQ: MOR) reported that the ongoing Phase 3 B-MIND study with the drug candidate tafasitamab has successfully passed the pre-planned, event-driven interim futility analysis (Press release, MorphoSys, NOV 18, 2019, View Source [SID1234551422]). The data was evaluated by an independent data control committee (IDMC). This recommended increasing the number of patients from the current 330 to 450. The B-MIND study compares the efficacy of the CD19 antibody tafasitamab in combination with bendamustine versus rituximab in combination with bendamustine in patients with relapsed or refractory diffuse large B-cell lymphoma (r / r DLBCL).
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As part of the futility interim analysis, the IDMC examined the data for the likelihood of a positive outcome of the study at the time of graduation. The IDMC evaluated the efficacy data in the entire patient population as well as in the biomarker-positive patient subpopulation. The biomarker, which describes patients with a low number of natural killer cells at baseline, was implemented as a co-primary endpoint in the first quarter of 2019 in a supplement to B-MIND. The IDMC’s recommendation to include more patients in the trials aims to increase the statistical power of the study in both the biomarker-positive patient subpopulation and the entire study population. The data from the analysis was not shared with MorphoSys.
Continuing the B-MIND study protocol, patient recruitment will be performed according to the original inclusion and exclusion criteria. This should further enable the comparison of efficacy in the whole as well as the biomarker-positive patient group. Topline results are expected to be available in the first quarter of 2022.
"We are delighted with the IDMC’s recommendation and see it as an important step in the clinical development of tafasitamab," said Drs. Malte Peters, Chief Development Officer of MorphoSys. "DLBCL is a difficult-to-treat disease with a high unmet medical need, so new treatment options are urgently needed, and we are well on our way to approving our BLA approval application for tafasitamab in combination with lenalidomide, regardless of B-MIND positive clinical trial results L-MIND and Re-MIND by the end of 2019. "
About B-MIND
The pivotal Phase 2/3 B-MIND trial is investigating tafasitamab in combination with the chemotherapeutic agent bendamustine in patients with relapsed or refractory diffuse large B-cell lymphoma (R / R DLBCL) who are not eligible for high-dose chemotherapy and subsequent chemotherapy Autologous stem cell transplantation compared to the combination of the anti-CD20 antibody rituximab plus bendamustine A low number of natural killer cells in the peripheral blood at baseline was implemented as a biomarker in coordination with the FDA in the first quarter of 2019. A pre-planned, event-driven futility interim analysis in the B-MIND study took place in November 2019 and resulted in an increase in patient count to 450 (out of 330).
About CD19 and tafasitamab (MOR208)
CD19 is broadly and homogeneously expressed in several malignant B-cell diseases including DLBCL and CLL. It has been shown that CD19 participates in the B cell receptor (BCR) signaling pathway, which is considered to be important for B cell survival and makes CD19 a potential target in B cell disease.
Tafasitamab (MOR208) is a humanized Fc-modified monoclonal antibody against CD19. The Fc modification of tafasitamab should lead to a significant increase in antibody-dependent cell-mediated cytotoxicity (ADCC) and antibody-dependent cellular phagocytosis (ADCP), thus improving a key mechanism of tumor cell killing. Tafasitamab has been studied in preclinical models to induce direct apoptosis by binding to CD19, which is considered to be a critical component for B cell receptor (BCR) signaling.
In addition to B-MIND, MorphoSys is investigating tafasitamab as a therapeutic option in B-cell malignancies in a series of ongoing combination trials. The open-label Phase 2 combination trial (L-MIND trial) is investigating the safety and efficacy of tafasitamab in combination with lenalidomide in patients with relapsed / refractory DLBCL who are not eligible for high-dose chemotherapy (HDC) and autologous stem cell transplantation (ASCT) in Question come. Based on preliminary data from L-MIND, the FDA granted the status of breakthrough therapy for tafasitamab plus lenalidomide in this patient population in October 2017.
Re-MIND, the real world data trial in a control group treated with lenalidomide monotherapy, reached its primary endpoint in October 2019 and demonstrated clinical superiority of the tafasitamab / lenalidomide combination compared to lenalidomide alone. In addition, tafasitamab is currently being studied in patients with relapsed / refractory CLL / SLL following the discontinuation of previous bron-tyrosine kinase inhibitor therapy (eg ibrutinib) in combination with idelalisib or venetoclax.