Everest Medicines Announces Partner Calliditas Therapeutics Reports Positive Topline Results from Phase 3 NefIgArd Trial Evaluating Nefecon in IgA Nephropathy

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Mar 13, 2023, 19:30 ET

SHANGHAI, March 13, 2023 /PRNewswire/ -- Everest Medicines (HKEX 1952.HK, "Everest", or the "Company") announced today that its partner Calliditas Therapeutics AB (Nasdaq: CALT, Nasdaq Stockholm: CALTX) ("Calliditas") reported positive topline results from the global, randomized, double-blind, placebo-controlled Phase 3 clinical trial NefIgArd, which investigated the effect of Nefecon 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. 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.

The key primary endpoint, eGFR over 2 years, was on average 5.05 mL/min/1.73 m2 higher with Nefecon compared to placebo (p<0.0001). 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. A treatment benefit on eGFR was apparent across baseline UPCR subgroups, and sustained proteinuria effects and long lasting eGFR treatment benefit were observed even after 15 months after discontinuation, supporting disease modification. The results also indicate that Nefecon was generally well-tolerated and the safety profile was consistent with that observed in Part A of the trial.

"We are very excited to see Nefecon's sustained impact on kidney function across the entire study population, that demonstrates its effect as a truly disease modifying first-in-disease treatment for IgAN patients. The sustained effects on proteinuria and on eGFR offer a specially designed treatment for IgAN patients at risk of progressive kidney function loss," said Rogers Yongqing Luo, Chief Executive Officer of Everest Medicines. "Chronic kidney disease is one of the most serious public health problems in China, where IgAN affects around five million people. Following Nefecon's approval and commercialization in U.S. and E.U, we hope to bring this novel therapy to Chinese patients as soon as possible this year."

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. On the basis of this new data, Calliditas plans to file for full approval from the FDA, and support filing for full approval with EC and UK MHRA during 2023.

Chinese subpopulation Part B topline results are expected to be available in Q3, 2023. The China National Medical Products Administration (NMPA) accepted Everest Medicines' New Drug Application (NDA) for Nefecon for the treatment of IgAN in November 2022 and has also been granted break-through therapy and priority review. Nefecon was the first non-oncology drug to receive break-through therapy designation in China.

About Nefecon

Nefecon is a patented oral, delayed release formulation of budesonide, a corticosteroid with potent glucocorticoid activity and weak mineralocorticoid activity that undergoes substantial first pass metabolism. The formulation is designed as a delayed release capsule that is enteric coated so that it remains intact until it reaches the Peyer's patch region of the lower small intestine. Each capsule contains coated beads of budesonide that target mucosal B-cells present in the ileum where the disease originates, as per the predominant pathogenesis models.

In June 2019, Everest Medicines entered into an exclusive, royalty-bearing license agreement with Calliditas, which gives Everest Medicines exclusive rights to develop and commercialize Nefecon in Mainland China, Hong Kong, Macau, Taiwan and Singapore. The agreement was extended in March 2022 to include South Korea as part of Everest Medicine's territories.

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 Nefecon 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 Nefecon 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 Nefecon compared to placebo. Patients taking Nefecon 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.

At 9 months, there was a 3.87 mL/min/1.73 m² difference in eGFR absolute change with Nefecon plus RASi vs RASi alone (-0.17 vs. -4.04).

Topline data of the NefIgArd study were reported in March 2023 in which the primary endpoint of eGFR was met as per above. The trial is expected to conclude in Q3 of 2023.

About Everest Medicines

Everest Medicines is a biopharmaceutical company focused on developing, manufacturing and commercializing transformative pharmaceutical products and vaccines that address critical unmet medical needs for patients in Asian markets. The management team of Everest Medicines has deep expertise and an extensive track record from both leading global pharmaceutical companies and local Chinese pharmaceutical companies in high-quality discovery, clinical development, regulatory affairs, CMC, business development, and operations. Everest Medicines has built a portfolio of potentially global first-in-class or best-in-class molecules in the company's core therapeutic areas of renal diseases, infectious diseases and autoimmune disorders. For more information, please visit its website at (www.everestmedicines.com).

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SOURCE Everest Medicines