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Apellis to Present New Long-Term Data Reinforcing the Robust Efficacy and Safety Profile of EMPAVELI® (pegcetacoplan) in PNH Patients at 2022 ASH Annual Meeting

WALTHAM, Mass., Nov. 03, 2022 (GLOBE NEWSWIRE) -- Apellis Pharmaceuticals, Inc. (Nasdaq: APLS), a global biopharmaceutical company and leader in complement, today announced that results from the long-term extension study of EMPAVELI® (pegcetacoplan) in adults with paroxysmal nocturnal hemoglobinuria (PNH) will be presented at the American Society of Hematology (ASH) Annual Meeting being held Dec. 10-13 in New Orleans, Louisiana. The data show that EMPAVELI, the first and only targeted C3 therapy, demonstrated robust and sustained improvements in key markers of disease across a broad population of PNH patients for up to two years.

“These results highlight the meaningful, long-term improvements that treatment with EMPAVELI can make in the lives of PNH patients, regardless of their severity of disease or prior treatment,” said Peter Hillmen, M.B. Ch.B., Ph.D., head of hematology engagement at Apellis. “EMPAVELI continues to demonstrate its potential to become a new standard of care for adults living with PNH, including the ability to achieve normalization across key markers of disease.”

The new results reinforce the positive efficacy and safety of EMPAVELI in both treatment-naïve patients and patients who had previously been treated with eculizumab, a C5 inhibitor, across all five prior PNH clinical studies. After being treated with EMPAVELI for up to two years, mean hemoglobin was sustained at near-normal levels at 11.6 g/dl, 83% of patients were transfusion free, and 73% of patients had normalized levels of lactate dehydrogenase (LDH). Long-term safety data were consistent with previous clinical study results, with no thrombotic events or meningitis infections reported. The most common adverse events (AEs) were hemolysis (17%) and injection site reactions (11%).

Presentation details include:

  • Long-Term Safety and Efficacy of Pegcetacoplan Treatment in Adults with Paroxysmal Nocturnal Hemoglobinuria– #1248 – Dec. 10, 5:30 p.m. – 7:30 p.m. ET

About the Long-Term Efficacy and Safety Extension (APL2-307) Study
The APL2-307 study was a nonrandomized, open-label, multicenter Phase 3 extension study of 137 adults with paroxysmal nocturnal hemoglobinuria (PNH) who completed previous EMPAVELI®/Aspaveli® (pegcetacoplan) Phase 1 (PHAROAH, PADDOCK), Phase 2 (PALOMINO), and Phase 3 (PEGASUS, PRINCE) clinical trials. Patients in these studies were either anemic despite eculizumab treatment, or were naïve to complement inhibitors. During the 48-week trial period, patients continued to receive 1080 mg of EMPAVELI twice weekly or once every three days (PEGASUS, PRINCE) or switched to 1080 mg of EMPAVELI twice weekly (PHAROAH, PADDOCK, PALOMINO). The primary objective was to establish the long-term efficacy and safety of EMPAVELI.

About EMPAVELI®/Aspaveli® (pegcetacoplan)
EMPAVELI®/Aspaveli® (pegcetacoplan) is a targeted C3 therapy designed to regulate excessive activation of the complement cascade, part of the body’s immune system, which can lead to the onset and progression of many serious diseases. It is approved for the treatment of paroxysmal nocturnal hemoglobinuria (PNH) in the United States, Australia, and Saudi Arabia as EMPAVELI and in the European Union and the United Kingdom as Aspaveli. The therapy is also under investigation for several other rare diseases across hematology, nephrology, and neurology.

U.S. Important Safety Information for EMPAVELI

BOXED WARNING: SERIOUS INFECTIONS CAUSED BY ENCAPSULATED BACTERIA

  • Meningococcal infections may occur in patients treated with EMPAVELI and may become rapidly life-threatening or fatal if not recognized and treated early. Use of EMPAVELI may predispose individuals to serious infections, especially those caused by encapsulated bacteria, such as Streptococcus pneumoniaeNeisseria meningitidis types A, C, W, Y, and B, and Haemophilus influenzae type B.
  • Comply with the most current Advisory Committee on Immunization Practices (ACIP) recommendations for vaccinations against encapsulated bacteria.
  • Vaccinate patients at least 2 weeks prior to administering the first dose of EMPAVELI unless the risks of delaying therapy with EMPAVELI outweigh the risk of developing a serious infection.
  • Vaccination reduces, but does not eliminate, the risk of serious infections. Monitor patients for early signs of serious infections and evaluate immediately if infection is suspected.
  • EMPAVELI is available only through a restricted program under a Risk Evaluation and Mitigation Strategy (REMS). Under the EMPAVELI REMS, prescribers must enroll in the program.

CONTRAINDICATIONS

  • Hypersensitivity to pegcetacoplan or to any of the excipients
  • Not currently vaccinated against certain encapsulated bacteria, unless the risks of delaying EMPAVELI treatment outweigh the risks of developing a bacterial infection with an encapsulated organism
  • Unresolved serious infection caused by encapsulated bacteria including Streptococcus pneumoniaeNeisseria meningitidis, and Haemophilus influenzae

WARNINGS AND PRECAUTIONS

Serious Infections Caused by Encapsulated Bacteria
The use of EMPAVELI may predispose individuals to serious, life-threatening, or fatal infections caused by encapsulated bacteria, including Streptococcus pneumoniaeNeisseria meningitidis types A, C, W, Y, and B, and Haemophilus influenzae type B (Hib). To reduce the risk of infection, all patients must be vaccinated against these bacteria according to the most current ACIP recommendations for patients with altered immunocompetence associated with complement deficiencies. Revaccinate patients in accordance with ACIP recommendations considering the duration of therapy with EMPAVELI.

For patients without known history of vaccination, administer required vaccines at least 2 weeks prior to receiving the first dose of EMPAVELI. If immediate therapy with EMPAVELI is indicated, administer required vaccine as soon as possible and provide patients with 2 weeks of antibacterial drug prophylaxis. Closely monitor patients for early signs and symptoms of serious infection and evaluate patients immediately if an infection is suspected. Promptly treat known infections. Serious infection may become rapidly life-threatening or fatal if not recognized and treated early. Consider discontinuation of EMPAVELI in patients who are undergoing treatment for serious infections.

EMPAVELI REMS
Because of the risk of serious infections, EMPAVELI is available only through a restricted program under a REMS. Under the EMPAVELI REMS, prescribers must enroll in the program and must counsel patients about the risk of serious infection, provide the patients with the REMS educational materials, and ensure patients are vaccinated against encapsulated bacteria. Enrollment and additional information are available by telephone: 1-888-343-7073 or at www.empavelirems.com.

Infusion-Related Reactions
Systemic hypersensitivity reactions (e.g., facial swelling, rash, urticaria) have occurred in patients treated with EMPAVELI. One patient (less than 1% in clinical studies) experienced a serious allergic reaction which resolved after treatment with antihistamines. If a severe hypersensitivity reaction (including anaphylaxis) occurs, discontinue EMPAVELI infusion immediately, institute appropriate treatment, per standard of care, and monitor until signs and symptoms are resolved.

Monitoring PNH Manifestations after Discontinuation of EMPAVELI
After discontinuing treatment with EMPAVELI, closely monitor for signs and symptoms of hemolysis, identified by elevated LDH levels along with sudden decrease in PNH clone size or hemoglobin, or reappearance of symptoms such as fatigue, hemoglobinuria, abdominal pain, dyspnea, major adverse vascular events (including thrombosis), dysphagia, or erectile dysfunction. Monitor any patient who discontinues EMPAVELI for at least 8 weeks to detect hemolysis and other reactions. If hemolysis, including elevated LDH, occurs after discontinuation of EMPAVELI, consider restarting treatment with EMPAVELI.

Interference with Laboratory Tests
There may be interference between silica reagents in coagulation panels and EMPAVELI that results in artificially prolonged activated partial thromboplastin time (aPTT); therefore, avoid the use of silica reagents in coagulation panels.

ADVERSE REACTIONS
The most common adverse reactions (incidence ≥10% of patients) with EMPAVELI vs. eculizumab were injection-site reactions (39% v. 5%), infections (29% v. 26%), diarrhea (22% v. 3%), abdominal pain (20% v. 10%), respiratory tract infection (15% v. 13%), viral infection (12% v. 8%), and fatigue (12% v. 23%).

USE IN SPECIFIC POPULATIONS
Females of Reproductive Potential
EMPAVELI may cause embryo-fetal harm when administered to pregnant women. Pregnancy testing is recommended for females of reproductive potential prior to treatment with EMPAVELI. Advise female patients of reproductive potential to use effective contraception during treatment with EMPAVELI and for 40 days after the last dose.

Please see full Prescribing Information, including Boxed WARNING regarding serious infections caused by encapsulated bacteria, and Medication Guide.

About Paroxysmal Nocturnal Hemoglobinuria (PNH)
PNH is a rare, chronic, life-threatening blood disorder characterized by the destruction of oxygen-carrying red blood cells through extravascular and intravascular hemolysis. Persistently low hemoglobin can result in frequent transfusions and debilitating symptoms such as severe fatigue, hemoglobinuria and difficulty breathing (dyspnea).

About the Apellis and Sobi Collaboration
Apellis and Sobi have global co-development rights for systemic pegcetacoplan. Sobi has exclusive ex-U.S. commercialization rights for systemic pegcetacoplan, and Apellis has exclusive U.S. commercialization rights for systemic pegcetacoplan and worldwide commercial rights for ophthalmological pegcetacoplan, including for geographic atrophy.

About Apellis 
Apellis Pharmaceuticals, Inc. is a global biopharmaceutical company that is committed to leveraging courageous science, creativity, and compassion to deliver life-changing therapies. Leaders in complement, we ushered in the first new class of complement medicine in 15 years with the approval of the first and only targeted C3 therapy. We are advancing this science to continually develop transformative medicines for people living with rare, retinal, and neurological diseases. For more information, please visit http://apellis.com or follow us on Twitter and LinkedIn.

Apellis Forward-Looking Statement
Statements in this press release about future expectations, plans and prospects, as well as any other statements regarding matters that are not historical facts, may constitute “forward-looking statements” within the meaning of The Private Securities Litigation Reform Act of 1995. The words “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “potential,” “predict,” “project,” “should,” “target,” “will,” “would” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Actual results may differ materially from those indicated by such forward-looking statements as a result of various important factors discussed in the “Risk Factors” section of Apellis’ Annual Report on Form 10-K with the Securities and Exchange Commission on February 28, 2022 and the risks described in other filings that Apellis may make with the Securities and Exchange Commission. Any forward-looking statements contained in this press release speak only as of the date hereof, and Apellis specifically disclaims any obligation to update any forward-looking statement, whether as a result of new information, future events or otherwise.

Media Contact: 
Jennifer Henesey
media@apellis.com
339.223.0962

Investor Contact: 
Meredith Kaya 
meredith.kaya@apellis.com
617.599.8178 


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