(Información remitida por la empresa firmante)
STOCKHOLM, March 13, 2023 /PRNewswire/ — Calliditas Therapeutics AB (NASDAQ: CALT) (NASDAQ Stockholm: CALTX) (“Calliditas”) today announced positive topline results from the global, randomized, double-blind, placebo-controlled Phase 3 clinical trial NefIgArd, which investigated the effect of Nefecon (TARPEYO®/Kinpeygo® (budesonide) delayed release capsules) versus placebo in patients with primary IgA nephropathy (IgAN).
The trial met its primary endpoint with Nefecon demonstrating a highly statistically significant benefit over placebo (p value 0.0001) in estimated glomerular filtration rate (eGFR) over the two-year period of 9-months of treatment with Nefecon or placebo and 15-months of follow-up off drug.
Supportive 2-year total slope analyses were statistically significant and clinically meaningful reflecting a sustained treatment benefit.
The eGFR benefit was observed across the entire study population, irrespective of urine protein-to-creatinine ratio (UPCR) baseline, which the company believes supports a regulatory filing for full approval in the study population.
UPCR reductions observed were durable, reflecting a long lasting treatment effect during the 15-month follow-up period off treatment.
“This is truly a great outcome for IgAN patients. This reflects sustained impact on kidney function across the entire study population with a treatment which was specifically designed to treat IgAN by downregulating pathogenic IgA1 antibodies at their presumed source and we believe this dataset supports regulatory filing for full approval based on the Phase 3 study population,” said CEO Renée Aguiar-Lucander.
“These data show the kidney function protection delivered by Nefecon and demonstrate that the approach offers patients a truly disease modifying treatment with sustained reductions in proteinuria over two years and continued eGFR benefit. Importantly Nefecon was well tolerated and together with the proteinuria and eGFR data mean that Nefecon has cemented its place as a key treatment option for patients with IgA nephropathy at risk of progressive kidney function loss,” said Dr Jonathan Barratt, Mayer Professor of Renal Medicine at Leicester University.
“These data establish that there is an option for patients with IgA nephropathy to specifically target their illness and to safely slow and delay progression of their kidney disease. The sustained effects on proteinuria and on eGFR are impressive and clinically meaningful,” said Richard Lafayette, Professor of Medicine (Nephrology) at Stanford University.
This data readout from Part B provides longer term data from the Phase 3 NefIgArd trial, which read out topline data on Part A in November 2020. An additional 29 Chinese patients, required for local Chinese regulatory purposes only, are expected to complete Part B in Q3, 2023. Based on the Part A data, Calliditas received accelerated approval from the U.S Food and Drug Administration (FDA) in December 2021 and conditional marketing authorization from the European Commission (EC) in July 2022, marking the first time a drug was approved for the treatment of IgAN in the US and the European Economic Area (EEA). Nefecon is being marketed by Calliditas in the US under the brand name TARPEYO®, and by STADA Arzneimittel AG in the EEA, Switzerland and the UK under the brand name Kinpeygo®.
“I am delighted with the positive outcome of the NefIgArd trial. This important milestone is the culmination of many years of hard work and dedication from so many people involved in the study. I would like to extend my thanks in particular to the investigators and site staff involved in the study, as well as of course the participating patients,” said Calliditas’ CMO, Dr. Richard Philipson.
On the basis of this data, Calliditas plans to file for full approval from the FDA, and support filing for full approval with EC and UK MHRA during 2023 for patients with primary IgAN based on the Phase 3 study population.
NefIgArd Topline Results
The analysis included 364 patients diagnosed with primary IgAN and who were on a background of optimized and stable renin-angiotensin system (RAS) inhibitor therapy. The patients were randomized in a 1:1 ratio into one of two treatment groups – Nefecon 16 mg/day orally or placebo – and treated for 9 months daily, and then monitored for 15 months off-drug.
eGFR Data
The key primary endpoint, eGFR over 2 years, was on average 5.05 mL/min/1.73 m2 higher with Nefecon compared to placebo (p0.0001). Mean change in eGFR over the 2-year period was -2.47 mL/min/1.73 m2 for Nefecon 16 mg versus -7.52 mL/min/1.73 m2 for placebo.
Safety Profile
The results indicate that Nefecon was generally well-tolerated and the safety profile was consistent with that observed in Part A of the trial.
Trial Design
The global clinical trial NefIgArd is an ongoing Phase 3, randomized, double-blind, placebo- controlled, multicenter study to evaluate the efficacy and safety of TARPEYO 16 mg once daily vs placebo in adult patients with primary IgAN as an addition to optimized RAS inhibitor therapy.
Part A of the study included a 9-month blinded treatment period and a 3-month follow-up period. The primary endpoint was UPCR, and eGFR was a secondary endpoint. Part B included a 12-month observational period off drug and assessed eGFR over the entire 2-year period for patients who were treated with the TARPEYO or placebo regimen in Part A in a total population of 360 patients.
The trial met its primary objective in Part A of demonstrating a statistically significant reduction in urine protein creatinine ratio (UPCR) or proteinuria after 9 months of treatment with 16 mg once daily of TARPEYO compared to placebo. Patients taking TARPEYO plus RAS inhibition (n=97) showed a statistically significant 34% reduction from baseline vs 5% with RASi alone (n=102) at 9 months, resulting in UPCR reduction of 31% (16% to 42%) p=0.0001.3
At 9 months, there was a 3.87 mL/min/1.73 m2 difference in eGFR absolute change with TARPEYO plus RASi vs RASi alone (-0.17 vs. -4.04).4
Topline data of the NefIgArd study were reported on March 12, 2023 in which the primary endpoint of eGFR was met as per above. The trial is expected to conclude in Q3 of 2023 when the final 29 patients in China (not required for global submission purposes) have completed 9 months of treatment and 15 months of observation.
Conference Call
The Company will host a live webcast for investors on Monday 13 March, 2023 at 8 A.M. ET (13:00 CET).
Interested participants may register for the webcast here: https://lifescievents.com/event/calliditas-webcast/
Indication and important safety information
Indication: TARPEYO® (budesonide), named Kinpeygo in the EEA, a 4mg delayed release capsule, is a corticosteroid indicated in the US to reduce proteinuria in adults with primary immunoglobulin A nephropathy (IgAN) at risk of rapid disease progression, generally a urine protein-to-creatinine ratio (UPCR) =1.5 g/g and in the EEA for the treatment of IgAN in adults at risk of rapid disease progression with a urine protein-to-creatinine ratio (UPCR) =1.5 g/gram.
This indication is approved by the FDA in the US under an accelerated approval and as a conditional marketing authorisation by the European Commission for the EEA based on a reduction in proteinuria. It has not been established whether TARPEYO/Kinpeygo slows kidney function decline in patients with IgAN. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory clinical trial.
Important Safety Information
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