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ALCYONE: Adding daratumumab to VMP improves OS in NDMM

Roshini Claire Anthony
27 Dec 2019

The addition of daratumumab (D) to a bortezomib, melphalan, and prednisone (VMP) regimen improved overall survival (OS) in patients with newly diagnosed multiple myeloma (NDMM) who were ineligible for autologous stem cell transplantation (ASCT), results of the phase III ALCYONE trial showed.

“Daratumumab in combination with VMP prolonged OS in patients with transplant-ineligible NDMM, with a 40 percent reduction in the risk of death versus VMP alone,” said the researchers. “These findings continue to support the use of daratumumab-based regimens for front-line treatment in [this population].”

At a median follow-up period of 40.1 months, OS was significantly improved in patients who received D-VMP compared with VMP (36-month OS, 78.0 percent vs 67.9 percent; median OS not reached in either group; hazard ratio [HR], 0.60, 95 percent confidence interval [CI], 0.46–0.80; p=0.0003). [ASH 2019, abstract 859; Lancet 2019;doi:10.1016/S0140-6736(19)32956-3]

The OS benefit was consistent across all prespecified subgroups analysed, with follow-up ongoing for the one exception – patients with high cytogenetic risk.

As with the previous analysis at 16.5 months, progression-free survival (PFS) remained greater with D-VMP in this updated analysis (36-month PFS, 50.7 percent vs 18.5 percent; median PFS 36.4 vs 19.3 months; HR, 0.42, 95 percent CI, 0.34–0.51; p<0.0001). PFS during subsequent line of therapy also favoured D-VMP over VMP (36-month PFS, 73.2 percent vs 55.2 percent; HR, 0.55, 95 percent CI, 0.43–0.71; p<0.0001).

Overall response rate was also greater in the D-VMP than the VMP group (90.9 percent vs 73.9 percent; p<0.0001) including for complete response or better, or very good partial response or better. Four times more patients in the D-VMP than the VMP group were minimal residual disease (MRD) negative (28 percent vs 7 percent; p<0.0001).

A sustained negative MRD status for 12 months was associated with improved PFS and OS, noted the researchers.

In the initial nine cycles of treatment, the most frequent grade 3–4 treatment-emergent adverse events (AEs) were neutropenia (40 percent [D-VMP] vs 39 percent [VMP]), thrombocytopenia (34 percent vs 38 percent), and anaemia (15 percent vs 20 percent). Grade 3–4 infections occurred more often in D-VMP than VMP recipients during this period (22 percent vs 15 percent), as did serious AEs (38 percent vs 33 percent). During daratumumab-only maintenance therapy in the D-VMP group, respiratory tract infections (RTIs; 19 percent with upper RTI, 12 percent with viral upper RTI, and 15 percent with bronchitis), cough (12 percent), and diarrhoea (10 percent) were the most frequently occurring AEs.

These results were obtained from the assessment of 706 transplant ineligible patients (median age 71 years) with NDMM from 25 countries who were randomized 1:1 to receive D-VMP (n=350) or VMP* (n=356).

The OS benefit with continuous therapy is unsurprising, given that VMP recipients did not receive maintenance therapy compared with D-VMP recipients who received maintenance doses of daratumumab monotherapy, said Dr Saad Usmani from the Levine Cancer Institute–Atrium Health in Charlotte, North Carolina, US, in a commentary. [Lancet 2019;doi:10.1016/S0140-6736(19)33063-6]

“A pertinent question is whether the quadruplet therapy including daratumumab will replace the current triplet therapy and alter clinical practice to establish a new standard for transplant-ineligible NDMM. Based on favourable OS results of D-VMP, we believe the future is already here, and the benefit of adding daratumumab to a backbone of lenalidomide, bortezomib, and dexamethasone will be clarified once we have the mature results of an ongoing study in transplant-ineligible MM,” he said.

 

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Most Read Articles
Jairia Dela Cruz, 05 Oct 2020
Drinking more than two cups of coffee per day may just be the intervention that prevents hundreds of thousands of liver disease‐related deaths globally, a study reports.
Pearl Toh, 21 Sep 2020
Early and sustained treatments with simplified regimen are the key to achieving good asthma control, said experts during a presentation at the ERS 2020 Congress.
Roshini Claire Anthony, 12 Oct 2020

Insulin icodec, an in-development basal insulin analogue administered once weekly, was as effective as once-daily insulin glargine in patients with type 2 diabetes (T2D) insufficiently controlled with metformin with or without a DPP-4* inhibitor, according to a phase II trial presented at EASD 2020.

08 Oct 2020
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