Novartis’ Fabhalta Receives Positive CHMP Opinion for PNH Treatment: A Potential Game-Changer

Novartis’ Fabhalta Receives Positive CHMP Opinion for PNH Treatment: A Potential Game-Changer

(IN BRIEF) Novartis has announced that the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) has recommended granting marketing authorization for Fabhalta® (iptacopan) for the treatment of adults with paroxysmal nocturnal hemoglobinuria (PNH) who have hemolytic anemia. This positive opinion is based on robust data from Phase III studies demonstrating the efficacy and safety of Fabhalta compared to current anti-C5 therapies. If approved by the European Commission, Fabhalta would be the first oral monotherapy available for PNH patients in Europe, potentially offering a practice-changing treatment option that could significantly improve patients’ quality of life by reducing symptoms and the need for regular transfusions or infusions. The decision is eagerly awaited, with expectations of providing a much-needed alternative for individuals living with this chronic blood disorder.

(PRESS RELEASE) BASEL, 23-Mar-2024— /EuropaWire/ — Novartis announced  that the Committee for Medicinal Products for Human Use (CHMP) of the European Medicines Agency (EMA) has adopted a positive opinion and recommended granting a marketing authorization for Fabhalta® (iptacopan) for the treatment of adults with paroxysmal nocturnal hemoglobinuria (PNH) who have hemolytic anemia1.

“With a robust body of evidence and a demonstrated safety profile, Fabhalta could be practice-changing for patients, helping relieve burdens experienced by people living with PNH,” said Antonio Risitano, M.D., Ph.D., President of the International PNH Interest Group and Head of the Hematology and Hematopoietic Transplant Unit, Reference Center for Aplastic Anemia and Paroxysmal Nocturnal Hemoglobinuria at the AORN San Giuseppe Moscati, Avellino, Italy. “In clinical studies, oral iptacopan demonstrated superior hemoglobin improvement without the need for red blood cell transfusions compared to anti-C5 therapies, leading to normalization of hemoglobin in the majority of patients—a potentially groundbreaking benefit for those living with this chronic blood disorder.”

PNH is a rare and debilitating chronic blood disorder that occurs when blood cells which are intrinsically susceptible to a part of the immune system called the complement system expand over normal blood cells due to a permissive immune environment8-11. PNH is characterized by hemolysis, bone marrow failure, and thrombosis in varying combinations and levels of severity6,7,12. Current anti-C5 treatments are administered via infusion or subcutaneous injection and may leave PNH symptoms uncontrolled. Up to 50% of patients on anti-C5 treatment may have persistent anemia with 23-39% remaining dependent on blood transfusions, and the majority (75-89%) of patients on anti-C5 treatment remain fatigued7,13-17.

The positive CHMP decision is based on robust data from the Phase III APPLY-PNH study in patients with residual anemia despite prior anti-C5 treatment who switched to Fabhalta vs. patients who stayed on anti-C5 treatment, and the Phase III APPOINT-PNH study in complement-inhibitor naïve patients1. In APPLY-PNH, at 24 weeks, 82.3% of anti-C5-experienced Fabhalta patients achieved a sustained increase of Hb levels ≥2 g/dL from baseline in the absence of transfusions vs. 2.0% for anti-C5 (difference of 80.2%, P<0.0001); in APPOINT-PNH, 92.2% of complement inhibitor-naïve patients using Fabhalta achieved this outcome2,3. Similarly, in APPLY-PNH, results highlighted a transfusion avoidance rate of 94.8% for anti-C5-experienced Fabhalta patients vs. 25.9% for those on anti-C5 (difference of 68.9%, P<0.0001)18. In both studies, Fabhalta was also shown to control the destruction of red blood cells (RBCs) within the blood vessels, known as intravascular hemolysis (IVH), with mean lactate dehydrogenase (LDH) levels maintained at <1.5 x upper limit of normal2,3,19. In APPLY-PNH, patients reported improvements in fatigue as measured by Functional Assessment of Chronic Illness Therapy – Fatigue [FACIT-F] scores2,19. The safety profile of iptacopan was consistent across both APPLY-PNH and APPOINT-PNH studies2,3.

“If approved by the European Commission, Fabhalta would be the first oral monotherapy available to PNH patients in Europe,” said Patrick Horber M.D., President, International, Novartis, Basel. “With current standard of care, PNH symptoms are often uncontrolled, while patients endure regular and time-consuming infusions. This oral therapy could provide a much-needed alternative to support many people living with PNH who often have to structure their lives around managing their condition.’’

Following the CHMP’s recommendation to approve Fabhalta in adult patients with PNH who have hemolytic anemia, the European Commission (EC) will take a final decision within approximately two months.

About APPLY-PNH
APPLY-PNH (NCT04558918) was a Phase III, randomized, multinational, multicenter, active-comparator controlled, open-label trial to evaluate the efficacy and safety of twice-daily, oral Fabhalta monotherapy (200 mg) for the treatment of PNH by assessing if switching to Fabhalta was superior to continuing on anti-C5 therapies in adult patients presenting with residual anemia (Hb <10 g/dL) despite a stable regimen of anti-C5 treatment in the last six months prior to randomization 2,20. The trial enrolled 97 patients who were randomized in an 8:5 ratio to either twice-daily, oral Fabhalta monotherapy, or intravenous anti-C5 therapies (continuing with the same regimen as they were on prior to randomization)2,20.

About APPOINT-PNH 
APPOINT-PNH (NCT04820530) was a Phase III, multinational, multicenter, open-label, uncontrolled single-arm study to evaluate the efficacy and safety of twice-daily, oral Fabhalta monotherapy (200 mg) in adult PNH patients who are naïve to complement inhibitor therapy, including anti-C5 therapies (eculizumab or ravulizumab)3,21. The trial enrolled 40 patients who received twice-daily, oral Fabhalta monotherapy3,21.

About paroxysmal nocturnal hemoglobinuria (PNH)
PNH is a rare, chronic and serious complement-mediated blood disorder12. People with PNH have an acquired mutation in some of their hematopoietic stem cells (which are located in the bone marrow and can grow and develop into RBCs, white blood cells and platelets) that causes them to produce RBCs that are susceptible to premature destruction by the complement system7,12. This leads to intravascular hemolysis (destruction of RBCs within blood vessels) and extravascular hemolysis (destruction of RBCs mostly in the spleen and liver), which cause anemia (low levels of circulating RBCs), thrombosis (formation of blood clots), fatigue and other debilitating symptoms7,12.

It is estimated that approximately 10-20 people per million worldwide live with PNH7. Although PNH can develop at any age, it is often diagnosed in people between 30-40 years old8,21,22.

PNH has a significant unmet need not addressed by anti-C5 therapies (eculizumab or ravulizumab); despite treatment with anti-C5s, a large proportion of people with PNH remain anemic, and some dependent on blood transfusions6,7,13-17.

About Fabhalta® (iptacopan)  
Fabhalta (iptacopan) is an oral, Factor B inhibitor of the alternative complement pathway1. Fabhalta was approved by the US Food and Drug Administration (FDA) in December 2023 for the treatment of adults with paroxysmal nocturnal hemoglobinuria (PNH).

Discovered at Novartis, Fabhalta is currently in development for a range of other complement-mediated diseases including immunoglobulin A nephropathy (IgAN), C3 glomerulopathy (C3G), immune complex membranoproliferative glomerulonephritis (IC-MPGN) and atypical hemolytic uremic syndrome (aHUS).

Disclaimer
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References

1. Committee for Medicinal Products for Human Use (CHMP). Available at https://www.ema.europa.eu/en/committees/committee-medicinal-products-human-use-chmp. Accessed March 2024.
2. Ristanio AM, Rӧth A, Kulasekararaj A, et al. Oral Iptacopan Monotherapy Has Superior Efficacy to Anti-C5 Therapy in Patients with Paroxysmal Nocturnal Hemoglobinuria and Residual Anemia. Results from the Phase III APPLY-PNH Study. Presented at 49th Annual Meeting of the European Society for Blood and Marrow Transplantation (EBMT); April 23-26, 2023; Paris, France.
3. Risitano AM, Han B, Ueda Y, et al. Oral Complement Factor B Inhibitor Iptacopan Monotherapy Improves Hemoglobin to Normal/Near-Normal Levels in Paroxysmal Nocturnal Hemoglobinuria Patients Naïve to Complement Inhibitors: Phase III APPOINT-PNH Trial. Presented at: 49th Annual Meeting of the European Society for Blood and Marrow Transplantation (EBMT); April 23-36, 2023; Paris, France.
4. Risitano AM, Röth A, Soret J, et al. Addition of iptacopan, an oral factor B inhibitor, to eculizumab in patients with paroxysmal nocturnal haemoglobinuria and active haemolysis: an open-label, single-arm, phase 2, proof-of-concept trial. Lancet Haematol. 2021;8(5):e344-e354. doi:10.1016/S2352-3026(21)00028-4
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6. McKinley CE, Richards SJ, Munir T, et al. Extravascular Hemolysis Due to C3-Loading in Patients with PNH Treated with Eculizumab: Defining the Clinical Syndrome. Blood. 2017;130(Supplement 1):3471. doi:10.1182/blood.V130.Suppl_1.3471.3471
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13. Risitano AM, Marotta S, Ricci P, et al. Anti-complement Treatment for Paroxysmal Nocturnal Hemoglobinuria: Time for Proximal Complement Inhibition? A Position Paper From the SAAWP of the EBMT. Front Immunol 2019;10:1157. doi:10.3389/fimmu.2019.01157
14. Shammo et al. HemaSphere 2023 Shammo J, Kim J, Georget M, et al. P796: Hospitalization in patients with paroxysmal nocturnal hemoglobinuria: a retrospective analysis of observational study data from the United States. Hemasphere. 2023;7(Suppl ):e22585a2. doi:10.1097/01.HS9.0000970088.22585.a2
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18. Novartis. Data on file
19. Risitano AM, Kulasekararaj A, Rӧth A, et al. Factor B Inhibition with Oral Iptacopan Monotherapy Demonstrates Sustained Long-Term Efficacy and Safety in Anti-C5-Treated Patients (pts) with Paroxysmal Nocturnal Hemoglobinuria (PNH) and Persistent Anemia: Final 48-Week Results from the Multicenter, Phase III APPLY-PNH Trial. Presented at: 65th American Society of Hematology Annual Meeting & Exposition (ASH); December 9-12, 2023; San Diego, CA.
20. Novartis Pharmaceuticals. A Randomized, Multicenter, Active-Comparator Controlled, Open-Label Trial to Evaluate Efficacy and Safety of Oral, Twice Daily LNP023 in Adult Patients With PNH and Residual Anemia, Despite Treatment With an Intravenous Anti-C5 Antibody. clinicaltrials.gov. Accessed February 14, 2024. https://clinicaltrials.gov/ct2/show/NCT04558918
21. Novartis Pharmaceuticals. A Multicenter, Single-Arm, Open-Label Trial to Evaluate Efficacy and Safety of Oral, Twice Daily Iptacopan in Adult PNH Patients Who Are Naive to Complement Inhibitor Therapy. clinicaltrials.gov. Accessed February 14, 2024. https://clinicaltrials.gov/ct2/show/NCT04820530
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