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Novartis presents latest Phase III Fabhalta® (iptacopan) data in C3 glomerulopathy (C3G) showing clinically meaningful and statistically significant 35.1% proteinuria reduction vs. placebo

  • Secondary endpoint data for estimated glomerular filtration rate (eGFR) showed numerical improvement over 6 months vs. placebo1; additional 6-month open-label data to be presented at a future medical meeting2,3
  • Fabhalta showed a favorable safety profile with no new safety signals1
  • C3G, an ultra-rare kidney disease caused by alternative complement pathway overactivation, progresses to kidney failure in 50% of patients within 10 years4-7; currently there are no treatments approved for C3G7-9 
  • Fabhalta, an oral Factor B inhibitor of the alternative complement pathway, selectively targets the underlying cause of C3G1; late-stage development program ongoing across several other rare diseases10-13

Basel, May 25, 2024 – Novartis today presented results from the 6-month, double-blind period of the Phase III APPEAR-C3G study of Fabhalta® (iptacopan) at the late-breaking clinical trials session of the European Renal Association (ERA) Congress1. Patients treated with Fabhalta in addition to supportive care achieved a 35.1% (p=0.0014) reduction in proteinuria (as measured by 24-hour urine protein to creatinine ratio [UPCR]) at 6 months when compared to placebo on top of supportive care1. In many kidney diseases, proteinuria reduction is an increasingly recognized surrogate marker correlating with delaying progression to kidney failure14,15.

Fabhalta is an oral Factor B inhibitor of the alternative complement pathway being investigated in adult patients with C3 glomerulopathy (C3G)1-3. Regulatory submissions, including to the FDA and EMA, for the adult C3G indication are planned for the second half of 2024.

“C3G is an overlooked and devastating illness that often strikes when people are young. The prognosis for patients with C3G is poor, and around half of the affected patients progress to kidney failure requiring dialysis or transplant within 10 years of being diagnosed,” said Marianne Silkjær Nielsen, Founder of CompCure, a Danish non-profit association committed to improving outcomes for individuals with C3G and immune complex membranoproliferative glomerulonephritis (IC-MPGN). “Currently there are no therapies approved for C3G, but research into potential new treatments developed specifically for this disease gives us hope that we can improve outcomes for patients and blunt its emotional, physical and social effects.”

Additional data on the secondary endpoint of estimated glomerular filtration rate (eGFR), a measure of kidney function, showed a numerical improvement of +2.2 mL/min/1.73 m2 (p=0.1945) over 6 months with Fabhalta compared to placebo1. The study also showed Fabhalta has a favorable safety profile with no new safety signals1.

“This is an exciting milestone for patients and the potential future management of C3G. The hallmark of C3G is overactivation of part of the immune system called the alternative complement pathway, which damages the kidneys and leads to severe loss of kidney function in many patients. Currently used treatments don’t address the underlying biology of C3G and often come with significant side effects that add to the burden of the illness,” said Professor David Kavanagh, Professor of Complement Therapeutics & Honorary Consultant Nephrologist at the Faculty of Medical Sciences at Newcastle University and APPEAR-C3G Steering Committee Member. “Fabhalta is the first potential treatment that targets the alternative complement pathway in C3G, and its impact on measures of kidney damage and kidney function in this study, in addition to its safety profile, is encouraging for patients and the clinical community.”

The APPEAR-C3G study continues with an additional 6-month, open-label period following the 6-month double-blind period, in which all patients receive Fabhalta, including those previously receiving placebo2,3. These data will be presented at an upcoming medical meeting when available.

At ERA, Novartis is also presenting new data across its rare disease portfolio, including results for investigational atrasentan in IgA nephropathy (IgAN) from the 36-week interim analysis of the Phase III ALIGN study, additional data for Fabhalta in IgAN from the 9-month interim analysis of the Phase III APPLAUSE-IgAN study, long-term 33-month efficacy and safety data for Fabhalta in C3G from the Phase II extension study, 1-year Phase I/II data for investigational zigakibart in IgAN, and data from real-world studies in C3G and atypical hemolytic uremic syndrome (aHUS)16-19.

“Our ambition is to transform the care of patients living with rare kidney diseases by discovering, developing and delivering innovative treatment options,” said David Soergel, M.D., Global Head, Cardiovascular, Renal and Metabolism Development Unit, Novartis. “The APPEAR-C3G results add to the growing body of evidence demonstrating Fabhalta’s potential to target the underlying pathophysiological drivers and to provide clinically meaningful outcomes in a range of rare conditions.”