Orelabrutinib in the Treatment of Relapsed/Refractory AIHA

Summary

1. wAIHA Treatment Regimen: Group A (50mg group): Orelabrutinib 50 mg, orally, once daily. After 4 weeks of treatment, if still transfusion-dependent or hemoglobin increase is \< 20 g/L, the dose may be increased to 100 mg qd. Treatment can be discontinued if ineffective at 12 weeks. Group B (100mg group): Orelabrutinib 100 mg, orally, once daily. The treatment course is at least 12 weeks. Treatment can be discontinued if ineffective at 12 weeks. Patients who respond and tolerate the drug well may continue treatment for up to 52 weeks or longer to observe long-term efficacy and safety. 2. cAIHA Treatment Regimen: Group C (150mg group): Orelabrutinib 150 mg, orally, once daily. The treatment course is at least 12 weeks. Patients who respond and tolerate the drug well may continue treatment for up to 52 weeks or longer to observe long-term efficacy and safety.

Timeline

Start

2026-03-01

Primary completion

2027-03-01

Completion

2028-03-01

Publications

• Background Yan S, Zhou H, Huang R, Wang F, Mei H, Lin L, Guo J, Zhou X, Li Z, Liu Y, Li S, Zhou W, Hou Y, Hou M. A phase 2 trial of orelabrutinib showing promising efficacy and safety in patients with persistent or chronic primary immune thrombocytopenia. Am J Hematol. 2024 Jul;99(7):1392-1395. doi: 10.1002/ajh.27303. Epub 2024 Mar 28. No abstract available.
• Background Yu TS, Han SQ, Wang LJ, Wang HY, Ni XF, Wang RT, Li GS, Hou Y, Peng J, Yan ZY, Zhao YJ, Hou M, Liu XG. Effects of orelabrutinib, a BTK inhibitor, on antibody-mediated platelet destruction in primary immune thrombocytopenia. Br J Haematol. 2025 Apr;206(4):1186-1199. doi: 10.1111/bjh.20045. Epub 2025 Mar 11.
• Background Robak E, Robak T. Bruton's Kinase Inhibitors for the Treatment of Immunological Diseases: Current Status and Perspectives. J Clin Med. 2022 May 16;11(10):2807. doi: 10.3390/jcm11102807.
• Background Byrd JC, Wierda WG, Schuh A, Devereux S, Chaves JM, Brown JR, Hillmen P, Martin P, Awan FT, Stephens DM, Ghia P, Barrientos J, Pagel JM, Woyach JA, Burke K, Covey T, Gulrajani M, Hamdy A, Izumi R, Frigault MM, Patel P, Rothbaum W, Wang MH, O'Brien S, Furman RR. Acalabrutinib monotherapy in patients with relapsed/refractory chronic lymphocytic leukemia: updated phase 2 results. Blood. 2020 Apr 9;135(15):1204-1213. doi: 10.1182/blood.2018884940.
• Background Galinier A, Delwail V, Puyade M. Ibrutinib Is Effective in the Treatment of Autoimmune Haemolytic Anaemia in Mantle Cell Lymphoma. Case Rep Oncol. 2017 Jan 27;10(1):127-129. doi: 10.1159/000456002. eCollection 2017 Jan-Apr.
• Background Manda S, Dunbar N, Marx-Wood CR, Danilov AV. Ibrutinib is an effective treatment of autoimmune haemolytic anaemia in chronic lymphocytic leukaemia. Br J Haematol. 2015 Sep;170(5):734-6. doi: 10.1111/bjh.13328. Epub 2015 Feb 25. No abstract available.
• Background Rogers KA, Ruppert AS, Bingman A, Andritsos LA, Awan FT, Blum KA, Flynn JM, Jaglowski SM, Lozanski G, Maddocks KJ, Byrd JC, Woyach JA, Jones JA. Incidence and description of autoimmune cytopenias during treatment with ibrutinib for chronic lymphocytic leukemia. Leukemia. 2016 Feb;30(2):346-50. doi: 10.1038/leu.2015.273. Epub 2015 Oct 7.
• Background Montillo M, O'Brien S, Tedeschi A, Byrd JC, Dearden C, Gill D, Brown JR, Barrientos JC, Mulligan SP, Furman RR, Cymbalista F, Plascencia C, Chang S, Hsu E, James DF, Hillmen P. Ibrutinib in previously treated chronic lymphocytic leukemia patients with autoimmune cytopenias in the RESONATE study. Blood Cancer J. 2017 Feb 3;7(2):e524. doi: 10.1038/bcj.2017.5. No abstract available.
• Background Iwata S, Tanaka Y. B-cell subsets, signaling and their roles in secretion of autoantibodies. Lupus. 2016 Jul;25(8):850-6. doi: 10.1177/0961203316643172.
• Background Liubchenko GA, Appleberry HC, Striebich CC, Franklin KE, Derber LA, Holers VM, Lyubchenko T. Rheumatoid arthritis is associated with signaling alterations in naturally occurring autoreactive B-lymphocytes. J Autoimmun. 2013 Feb;40:111-21. doi: 10.1016/j.jaut.2012.09.001. Epub 2012 Oct 8.
• Background McDonald C, Xanthopoulos C, Kostareli E. The role of Bruton's tyrosine kinase in the immune system and disease. Immunology. 2021 Dec;164(4):722-736. doi: 10.1111/imm.13416. Epub 2021 Oct 4.
• Background Ringheim GE, Wampole M, Oberoi K. Bruton's Tyrosine Kinase (BTK) Inhibitors and Autoimmune Diseases: Making Sense of BTK Inhibitor Specificity Profiles and Recent Clinical Trial Successes and Failures. Front Immunol. 2021 Nov 3;12:662223. doi: 10.3389/fimmu.2021.662223. eCollection 2021.
• Background Zarrin AA, Bao K, Lupardus P, Vucic D. Kinase inhibition in autoimmunity and inflammation. Nat Rev Drug Discov. 2021 Jan;20(1):39-63. doi: 10.1038/s41573-020-0082-8. Epub 2020 Oct 19.
• Background Birgens H, Frederiksen H, Hasselbalch HC, Rasmussen IH, Nielsen OJ, Kjeldsen L, Larsen H, Mourits-Andersen T, Plesner T, Ronnov-Jessen D, Vestergaard H, Klausen TW, Schollkopf C. A phase III randomized trial comparing glucocorticoid monotherapy versus glucocorticoid and rituximab in patients with autoimmune haemolytic anaemia. Br J Haematol. 2013 Nov;163(3):393-9. doi: 10.1111/bjh.12541. Epub 2013 Aug 24.
• Background Jager U, Barcellini W, Broome CM, Gertz MA, Hill A, Hill QA, Jilma B, Kuter DJ, Michel M, Montillo M, Roth A, Zeerleder SS, Berentsen S. Diagnosis and treatment of autoimmune hemolytic anemia in adults: Recommendations from the First International Consensus Meeting. Blood Rev. 2020 May;41:100648. doi: 10.1016/j.blre.2019.100648. Epub 2019 Dec 5.

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