PMID- 37707673 OWN - NLM STAT- MEDLINE DCOM- 20231127 LR - 20240429 IS - 1865-8652 (Electronic) IS - 0741-238X (Print) IS - 0741-238X (Linking) VI - 40 IP - 11 DP - 2023 Nov TI - Injection Site Reactions with Long-Term Pegcetacoplan Use in Patients with Paroxysmal Nocturnal Hemoglobinuria: A Brief Report. PG - 5115-5129 LID - 10.1007/s12325-023-02653-4 [doi] AB - INTRODUCTION: Pegcetacoplan is a targeted complement component 3 (C3) therapy approved for adults with paroxysmal nocturnal hemoglobinuria (PNH; US) or PNH plus anemia despite C5-targeted therapy for >/= 3 months (EU). Patients with PNH receiving pegcetacoplan in the phase 3 PEGASUS trial who experienced injection site reactions (ISRs) mostly experienced mild events. We evaluated ISR incidence and severity with longer-term treatment in the PEGASUS cohort of the Study 307 open-label extension (307 OLE). METHODS: Patients from PEGASUS enrolled in the 307 OLE continued pegcetacoplan subcutaneous self-administration twice or three times weekly or every 3 days for an additional 48 weeks. ISRs were coded as adverse events (AEs) or treatment-emergent AEs (TEAEs) and summarized by MedDRA System Organ Class and Preferred Term. RESULTS: As of August 27, 2021, 58/64 patients from PEGASUS completed an additional 48 weeks of treatment in the 307 OLE (median treatment duration 337.0 [range 55-344] days); 95.3% (61/64) of patients achieved compliance >/= 80%. ISRs occurred in 9/64 (14.1%) patients in the 307 OLE, which was lower than observed at PEGASUS completion (20/77; 26.0%). Most patients with ISRs in the 307 OLE had events with a maximum severity of mild (7/9 patients; 77.8%). Injection site erythema and induration were the most common overall (4/64 patients each; 6.3%) and pegcetacoplan-related (3/64 patients each; 4.7%) ISRs. The exposure-adjusted rates of these events were each 6.5 per 100 patient-years. No ISRs were classified as severe or serious TEAEs or led to drug discontinuation. CONCLUSION: Though ISRs were common, most were mild, and the percentage of patients reporting ISRs declined from PEGASUS through the 307 OLE. Patient compliance remained high, and no patients discontinued because of ISRs, suggesting that ISRs do not pose a barrier to long-term pegcetacoplan treatment. TRIAL REGISTRATION: ClinicalTrials.gov identifiers: NCT03500549 (PEGASUS) and NCT03531255 (307 OLE). CI - (c) 2023. The Author(s). FAU - Sharma, Vivek AU - Sharma V AUID- ORCID: 0000-0003-4871-2114 AD - University of Louisville, Louisville, KY, USA. vivek.sharma@louisville.edu. FAU - Koprivnikar, Jamie AU - Koprivnikar J AD - John Theurer Cancer Center at Hackensack University Medical Center, Hackensack, NJ, USA. FAU - Drago, Kristen AU - Drago K AD - Apellis Pharmaceuticals, Inc, Waltham, MA, USA. FAU - Savage, Jessica AU - Savage J AD - Apellis Pharmaceuticals, Inc, Waltham, MA, USA. FAU - Bachelor, Allison AU - Bachelor A AD - Apellis Pharmaceuticals, Inc, Waltham, MA, USA. LA - eng SI - ClinicalTrials.gov/NCT03500549 SI - ClinicalTrials.gov/NCT03531255 GR - Apellis Pharmaceuticals/ GR - Swedish Orphan Biovitrum/ PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230914 PL - United States TA - Adv Ther JT - Advances in therapy JID - 8611864 RN - TO3JYR3BOU (pegcetacoplan) MH - Adult MH - Humans MH - *Hemoglobinuria, Paroxysmal/drug therapy MH - Injection Site Reaction PMC - PMC10567944 OTO - NOTNLM OT - Clinical trial OT - Injection site reactions OT - Management OT - Paroxysmal nocturnal hemoglobinuria OT - Pegcetacoplan COIS- KD, JS, and AB are employees of Apellis Pharmaceuticals, Inc and hold stock options. VS is on the speaker's bureau for Alexion, Sanofi, and Novo Nordisk. JK: is on the advisory board/consultant for Apellis, Novartis and Alexion, and is on the speaker's bureau for Alexion, Apellis, Amgen, Jazz, CTI, BMS, and AbbVie. EDAT- 2023/09/14 12:42 MHDA- 2023/11/27 12:42 PMCR- 2023/09/14 CRDT- 2023/09/14 11:11 PHST- 2023/07/06 00:00 [received] PHST- 2023/08/16 00:00 [accepted] PHST- 2023/11/27 12:42 [medline] PHST- 2023/09/14 12:42 [pubmed] PHST- 2023/09/14 11:11 [entrez] PHST- 2023/09/14 00:00 [pmc-release] AID - 10.1007/s12325-023-02653-4 [pii] AID - 2653 [pii] AID - 10.1007/s12325-023-02653-4 [doi] PST - ppublish SO - Adv Ther. 2023 Nov;40(11):5115-5129. doi: 10.1007/s12325-023-02653-4. Epub 2023 Sep 14.