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Cao J, Lu S, Luo D, Pei R, Lu Y, Chen D, Du X, Li S. Successful treatment pure red cell aplasia after ABO major mismatched allogeneic hematopoietic stem cell transplantation with avatrombopag and low dose rituximab. Transfusion 2024; 64:510-516. [PMID: 38351735 DOI: 10.1111/trf.17743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/15/2024] [Accepted: 01/16/2024] [Indexed: 03/16/2024]
Abstract
BACKGROUND Pure red cell aplasia (PRCA) following allogeneic hematopoietic stem cell transplantation (allo-HSCT) with ABO major incompatibility is characterized by transfusion dependent anemia. No standard treatment existed for PRCA following allo-HSCT yet. STUDY DESIGN AND METHODS We conducted a retrospective study, and reported our experience with the use of avatrombopag and lower dose rituximab to treat five patients with PRCA subsequent to major ABO-incompatible allo-HSCT. RESULTS Five cases of PRCA were identified from 72 patients who underwent allo-HSCT with major or bidirectional ABO mismatch. Cumulative incidence at Day +60 was 6.9% (5/72) at our center. All donor and recipient blood groups were A+ and O+ , respectively. In the first three cases we reported, patients received erythropoietin, plasma exchange, and donor lymphocyte infusion, but none of them had any effect. After 4 weeks of treatment with low dose rituximab (100 mg/week) combined with avatrombopag (40 mg/day), favorable outcomes were obtained. According to the aforementioned experience, Cases 4 and 5 were administered low-dose rituximab and avatrombopag in 3 months after transplantation, and erythroid response was observed on 3 weeks after treatment. Our patients tolerated low-dose rituximab and avatrombopag well and experienced rapid efficacy, with a median duration of 3 weeks. Furthermore, no severe infection or thrombocytosis necessitated a dose adjustment. CONCLUSION Low-dose rituximab and avatrombopag may be an effective treatment for patients with PRCA after major ABO-incompatible allo-HSCT. The patients should be treated at least 90 days post transplantation if conventional erythropoietin therapy fails.
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Affiliation(s)
- Junjie Cao
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Institute of Hematology, Ningbo University, Ningbo, China
| | - Shaoyan Lu
- Department of blood transfusion, The Affiliated People's Hospital of Ningbo University, Ningbo, China
| | - Danjie Luo
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
| | - Renzhi Pei
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Institute of Hematology, Ningbo University, Ningbo, China
| | - Ying Lu
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Institute of Hematology, Ningbo University, Ningbo, China
| | - Dong Chen
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Institute of Hematology, Ningbo University, Ningbo, China
| | - Xiaohong Du
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Institute of Hematology, Ningbo University, Ningbo, China
| | - Shuangyue Li
- Department of Hematology, The Affiliated People's Hospital of Ningbo University, Ningbo, China
- Institute of Hematology, Ningbo University, Ningbo, China
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Wang Z, Zhang A, Xu Z, Wang N, Zhang J, Meng J, Dong S, Ma J, Hu Y, Ouyang J, Chen Z, An Q, Cheng X, Wu R. Efficacy and safety of avatrombopag in Chinese children with persistent and chronic primary immune thrombocytopenia: A multicentre observational retrospective study in China. Br J Haematol 2024. [PMID: 38362793 DOI: 10.1111/bjh.19342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 01/16/2024] [Accepted: 02/06/2024] [Indexed: 02/17/2024]
Abstract
Avatrombopag (AVA) is a novel thrombopoietin receptor agonist (TPO-RA) that has been recently approved as a second-line therapy for immune thrombocytopenia (ITP) in adults; however, its safety and efficacy data in children are lacking. Here, we demonstrated the efficacy and safety of AVA as second-line therapy in children with ITP. A multicentre, retrospective, observational study was conducted in children with persistent or chronic ITP who did not respond to or relapsed from previous treatment and were treated with AVA for at least 12 weeks between August 2020 and December 2022. The outcomes were the responses (defined as achieving a platelet count ≥30 × 109 /L, twofold increase in platelet count from baseline and absence of bleeding), including rapid response within 4 weeks, sustained response at weeks 12 and 24, bleeding control and adverse events (AEs). Thirty-four (18 males) patients with a mean age of 6.3 (range: 1.9-15.3) years were enrolled. The median number of previous treatment types was four (range: 1-6), and 41.2% patients switched from other TPO-RAs. Within 4 weeks, overall response (OR) was achieved in 79.4% patients and complete response (CR, defined as a platelet count ≥100 × 109 /L and the absence of bleeding) in 67.7% patients with a median response time of 7 (range: 1-27) days. At 12 weeks, OR was achieved in 88.2%, CR in 76.5% and sustained response in 44% of patients. At 24 weeks, 22/34 (64.7%) patients who achieved a response and were followed up for 24 weeks were evaluated; 12/22 (54.55%) achieved a sustained response. During AVA therapy, median platelet counts increased by week 1 and were maintained throughout the treatment period. The proportion of patients with grade 1-3 bleeding decreased from 52.95% at baseline to 2.94% at 12 weeks, while concomitant ITP medications decreased from 36.47% at baseline to 8.82% at 12 weeks, with only 9 (26.47%) patients receiving rescue therapy 23 times within 12 weeks. There were 61.8% patients with 59 AEs: 29.8% with Common Terminology Criteria for Adverse Events grade 1 and the rest with grade 2. These findings show that AVA could achieve a rapid and sustained response in children with persistent or chronic ITP as a second-line treatment, with good clinical bleeding control and reduction of concomitant ITP therapy, without significant AEs.
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Affiliation(s)
- Zhifa Wang
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Hemophilia Comprehensive Care Centre, Hematology Centre, National Centre for Children's Health, Ministry of Education, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Aijun Zhang
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan, China
| | - Zhongjin Xu
- Department of Hematology, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Nan Wang
- Department of Pharmacy, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jialu Zhang
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Hemophilia Comprehensive Care Centre, Hematology Centre, National Centre for Children's Health, Ministry of Education, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jinxi Meng
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Hemophilia Comprehensive Care Centre, Hematology Centre, National Centre for Children's Health, Ministry of Education, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Shuyue Dong
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Hemophilia Comprehensive Care Centre, Hematology Centre, National Centre for Children's Health, Ministry of Education, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jingyao Ma
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Hemophilia Comprehensive Care Centre, Hematology Centre, National Centre for Children's Health, Ministry of Education, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Yu Hu
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Hemophilia Comprehensive Care Centre, Hematology Centre, National Centre for Children's Health, Ministry of Education, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Juntao Ouyang
- Hematologic Disease Laboratory, Hematology Centre, Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, National Centre for Children's Health, Ministry of Education, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Zhenping Chen
- Hematologic Disease Laboratory, Hematology Centre, Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, National Centre for Children's Health, Ministry of Education, Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Qi An
- Department of Hematology, Xuzhou Children's Hospital, Xuzhou Medical University, Xuzhou, China
| | - Xiaoling Cheng
- Department of Pharmacy, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Runhui Wu
- Beijing Key Laboratory of Pediatric Hematology-Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Hemophilia Comprehensive Care Centre, Hematology Centre, National Centre for Children's Health, Ministry of Education, Beijing Children's Hospital, Capital Medical University, Beijing, China
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Meng W, Hua J, Wang J. Successful avatrombopag combined with cyclosporine treatment for carboplatin/pegylated liposomal doxorubicin/bevacizumab-induced acquired amegakaryocytic thrombocytopenia in a patient with recurrent ovarian cancer: case report. Front Oncol 2024; 14:1253230. [PMID: 38406810 PMCID: PMC10884148 DOI: 10.3389/fonc.2024.1253230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 01/22/2024] [Indexed: 02/27/2024] Open
Abstract
Carboplatin/pegylated liposomal doxorubicin/bevacizumab is an accepted standard anti-cancer treatment option for recurrent ovarian cancer. However, the occurrence of adverse events associated with this therapeutic regimen limits its continued clinical use. Among these adverse events, acquired amegakaryocytic thrombocytopenia is a rare but often potentially life-threatening adverse effect, and is intolerant to multiple treatment approaches. We report, for the first time, the successful treatment using avatrombopag combined with cyclosporine in one case of carboplatin/pegylated liposomal doxorubicin/bevacizumab-induced acquired amegakaryocytic thrombocytopenia, which was refractory or intolerant to glucocorticoids, intravenous immunoglobulin, recombinant human thrombopoietin, androgen, and even thrombopoietin receptor receptor agonist eltrombopag and herombopag. To date, this case manifests as normal platelet counts that are independent of transfusion. Our findings suggest that this combination is a potential and valuable alternative in acquired amegakaryocytic thrombocytopenia.
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Affiliation(s)
- Weikang Meng
- Department of Hematologic Oncology, Taizhou Municipal Hospital, Taizhou, China
| | - Jinsheng Hua
- Department of Hematologic Oncology, Taizhou Municipal Hospital, Taizhou, China
| | - Jiabing Wang
- Department of Pharmacy, Taizhou Municipal Hospital, Taizhou, China
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Yassin MA, Al-Rasheed M, Al-Khaboori M, Marashi M, Osman H, Wali Y, Al Kindi S, Alsayegh F, Provan D. Thrombopoietin-receptor agonists for adult patients with immune thrombocytopenia: a narrative review and an approach for managing patients fasting intermittently. Front Cardiovasc Med 2023; 10:1260487. [PMID: 38162126 PMCID: PMC10755910 DOI: 10.3389/fcvm.2023.1260487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Accepted: 11/17/2023] [Indexed: 01/03/2024] Open
Abstract
Introduction Thrombopoietin-receptor agonist (TPO-RAs) currently represent the state of art for treating immune thrombocytopenia. Their different molecular structures contribute to the difference in their pharmacodynamics and pharmacokinetics. This narrative review aims to provide an overview of the current TPO-RAs approved for primary immune thrombocytopenia (romiplostim, eltrombopag, avatrombopag) and the effect of intermittent fasting in adult patients receiving TPO-RAs. Areas covered Literature was searched with no limits on date or language, using various combinations of keywords. Data on the pharmacokinetics, pharmacodynamics, efficacy, and safety of TPO-RAs and the effect of intermittent fasting were summarized. Expert opinion Switching between TPO-RAs is a useful strategy to tackle some associated limitations. Romiplostim and avatrombopag have an advantage over eltrombopag as they do not require any dietary restrictions. In cases where romiplostim and avatrombopag are unavailable, patients should be educated on the appropriate administration, possible interactions, and dietary restrictions before initiating eltrombopag.
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Affiliation(s)
- Mohamed A. Yassin
- National Center for Cancer Care and Research, Hematology Section, Hamad Medical Corporation, Doha, Qatar
| | - Mona Al-Rasheed
- Hematology Unit, Department of Medicine, Al-Adan Hospital, Hadiya, Kuwait
| | | | - Mahmoud Marashi
- Dubai Academic Health Corporation, Dubai, United Arab Emirates
| | - Hani Osman
- Hematology-Oncology Department, Tawam Hospital, Abu Dhabi, United Arab Emirates
| | - Yasser Wali
- Department of Child Health, Sultan Qaboos University, Muscat, Oman
| | - Salam Al Kindi
- Department of Hematology, Sultan Qaboos University, Muscat, Oman
| | - Faisal Alsayegh
- Faculty of Medicine, Department of Medicine, Health Sciences Center, Kuwait University, Kuwait City, Kuwait
| | - Drew Provan
- Academic Haematology Unit, Blizard Institute, Barts and The London School of Medicine and Dentistry, London, United Kingdom
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Wan Z, Chen M, Han B. Avatrombopag, a promising novel thrombopoietin receptor agonist for refractory/relapsed/intolerant non-severe aplastic anemia: a phase 2 single-arm clinical trial. Ann Med 2023; 55:2224044. [PMID: 37318085 DOI: 10.1080/07853890.2023.2224044] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 04/01/2023] [Accepted: 06/03/2023] [Indexed: 06/16/2023] Open
Abstract
INTRODUCTION The therapeutic options for thrombocytopenia in non-severe aplastic anaemia (NSAA) are limited. Avatrombopag (AVA) is prescribed for thrombocytopenic diseases but not for NSAA. METHODS Herein, we conducted a phase 2, non-randomized, single-arm trial to explore the efficacy and safety of AVA in refractory/relapsed/intolerant NSAA. AVA dose was initiated at 20 mg/d and titrated to a maximum of 60 mg/d. The primary endpoint was the haematological response at 3 months. RESULTS Twenty-five patients were analyzed. The overall response rate (ORR) at 3 months was 56% (14/25), with 12% (3/25) achieving a complete response (CR). At a median follow-up of 7 (3-10) months, the OR and CR rates were 52% and 20%, respectively. Responders had a shorter duration of diagnosis of AVA administration than non-responders (10 (6-80) vs 37 (6-480) months, p = 0.027) and belonged to the relapsed/intolerant NSAA type (71% vs 27%, p = 0.047); 44% (8/18) patients previously treated with eltrombopag before enrollment responded at 3 months, with an average prior eltrombopag dose of median 72.5 (50-100) mg/d and an average AVA dose for a response of median 43.5 (20-60) mg/d. 3-month ORR had no significant correlation with eltrombopag exposure (p = 0.09), prior eltrombopag length (R2=0.11), or cumulative eltrombopag dose (R2=0.30). Only one patient relapsed after stopping AVA for 1 month. No serious AVA-related side effects or clone evolution were detected. CONCLUSION AVA is effective and well-tolerated in NSAA patients who are refractory, relapsed, or intolerant to CsA/tacrolimus ± eltrombopag. Earlier treatment and relapsed/intolerant AA may show a better short-term response rate. More studies are needed to define the optimal dose and the long-term efficacy (NCT04728789).
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Affiliation(s)
- Ziqi Wan
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, P.R. China
- Peking Union Medical College, Beijing, P.R. China
| | - Miao Chen
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, P.R. China
| | - Bing Han
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, P.R. China
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Zhang Z, Hu Q, Yang C, Chen M, Han B. Comparison of eltrombopag and avatrombopag in the treatment of refractory/relapsed aplastic anemia: a single-center retrospective study in China. Ther Adv Hematol 2023; 14:20406207231191310. [PMID: 37719987 PMCID: PMC10503291 DOI: 10.1177/20406207231191310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 07/14/2023] [Indexed: 09/19/2023] Open
Abstract
Background Eltrombopag (ELT), a thrombopoietin receptor agonist (TPO-RA), has been approved for relapsed/refractory aplastic anemia (AA). However, data on avatrombopag (AVA), another TPO-RA, are limited, and the comparisons between the two TPO-RAs are lacking. Objectives We aimed to compare the efficacy and safety between ELT and AVA in relapsed/refractory AA patients. Design In this retrospective study, patients with relapsed/refractory AA who had been treated with ELT (N = 45) or AVA (N = 30) alone and had compatible baseline hematological parameters were compared. Methods Data from patients diagnosed with acquired AA were retrospectively collected. All patients were refractory/relapsed to standard immunosuppressive therapy (IST) for at least 6 months before ELT or AVA. Patients had to be treated with ELT or AVA alone for at least 6 months before evaluation if they did not respond. Baseline characteristics, overall response (OR), complete response (CR), relapse, adverse events, and factors that may affect efficacy were analyzed. Results Of the 75 patients enrolled, 45 received ELT and 30 received AVA. Patients with AVA had a higher percentage of abnormal liver or renal function than those with ELT (p = 0.036). No significant difference was found in the OR/CR rate in the first/second/third/sixth month between the two cohorts (p > 0.05). Patients treated with AVA had a shorter median time to response than those treated with ELT (p = 0.012) and had a higher platelet level in the second month (p = 0.041). AVA had fewer adverse events than ELT (p = 0.046). Under compatible follow-up time (p = 0.463), no difference was found between the ELT and AVA cohorts in relapse (p = 1.000) or clone evolution (p = 0.637). No predictive factors for OR and CR in the sixth month were found for either ELT or AVA. Conclusion With worse liver or renal function, AVA had a similar OR/CR rate but a shorter median time to response and fewer adverse events for patients with relapsed/refractory AA.
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Affiliation(s)
- Zhuxin Zhang
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Qinglin Hu
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Chen Yang
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Miao Chen
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, China
| | - Bing Han
- Department of Hematology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Shuaifuyuan No. 1, Dongcheng District, Beijing 100730, China
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Abdelsamia M, Farid S, Dean S, Cataland SR. Thrombotic Complications in Immune Thrombocytopenia Patients Treated with Avatrombopag. Hematol Rep 2023; 15:518-523. [PMID: 37754669 PMCID: PMC10531320 DOI: 10.3390/hematolrep15030054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 03/27/2023] [Accepted: 07/06/2023] [Indexed: 09/28/2023] Open
Abstract
Avatrombopag is a novel oral non-peptide thrombopoietin receptor agonist (TPO-RA) that was approved by the FDA as a second-line therapy for chronic immune thrombocytopenia (cITP). Avatrombopag has shown promising results in regards to efficacy and tolerability, but to our knowledge, there are no reports of thrombotic complications associated with avatrombopag. We present two patients with chronic ITP who suffered thromboembolic events shortly after starting treatment with avatrombopag. The first case is that of a 30-year-old female with refractory cITP who failed multiple lines of ITP therapy and was hospitalized with an intracranial bleed. The patient eventually recovered after an emergent splenectomy but subsequently developed a right lower lobe pulmonary embolism three weeks after starting treatment with avatrombopag. The second case is that of a 58-year-old female with a prolonged history of ITP, and no prior history of peripheral vascular disease, who suffered from both arterial and venous thrombotic events four weeks after starting avatrombopag. Given the new arterial and venous thrombotic complications, avatrombopag was stopped. She was challenged with avatrombopag again and developed yet another thrombotic complication.
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Affiliation(s)
- Mahmoud Abdelsamia
- Department of Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Saira Farid
- Department of Medicine, Ohio State University, Columbus, OH 43210, USA
| | - Steven Dean
- Department of Medicine, Ohio State University, Columbus, OH 43210, USA
| | - Spero R. Cataland
- Department of Medicine, Ohio State University, Columbus, OH 43210, USA
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Rainone M, Kasparian S, Nguyen T, Talwar N, Yuan Y, Mei M, Mortimer JE, Waisman JR, Patel N, Pullarkat V. Thrombopoietin Receptor Agonists for Thrombocytopenia Secondary to HER2-Targeted Antibody Drug Conjugates. Oncologist 2023; 28:e843-e846. [PMID: 37335880 PMCID: PMC10485295 DOI: 10.1093/oncolo/oyad185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/01/2023] [Indexed: 06/21/2023] Open
Abstract
Trastuzumab emtansine and trastuzumab deruxtecan are widely used in breast cancer and other solid tumor malignancies. Thrombocytopenia is a common adverse event associated with the use of these agents that can lead to a treatment delay, reduction in dose intensity, and discontinuation. The role of thrombopoietin receptor agonists (TPO-RA) remains unknown in this setting. We report a case series of 6 individuals with breast cancer that experienced dose-reductions and therapy delays due to thrombocytopenia secondary to trastuzumab emtansine or trastuzumab deruxtecan therapy and received intervention with TPO-RA. All 6 were able to resume therapy with TPO-RA support.
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Affiliation(s)
- Michael Rainone
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Saro Kasparian
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Tina Nguyen
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Neel Talwar
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Yuan Yuan
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
- Department of Medical Oncology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Matthew Mei
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Joanne E Mortimer
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - James R Waisman
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
| | - Niki Patel
- Department of Medical Oncology and Therapeutics Research, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
- Department of Medical Oncology, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Vinod Pullarkat
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope Comprehensive Cancer Center, Duarte, CA, USA
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Mei H, Zhou H, Hou M, Sun J, Zhang L, Luo J, Jiang Z, Ye X, Xu Y, Lu J, Wang H, Hui A, Zhou Y, Hu Y. Avatrombopag for adult chronic primary immune thrombocytopenia: a randomized phase 3 trial in China. Res Pract Thromb Haemost 2023; 7:102158. [PMID: 37700877 PMCID: PMC10493258 DOI: 10.1016/j.rpth.2023.102158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 09/14/2023] Open
Abstract
Background Immune thrombocytopenia (ITP) is an autoimmune disorder with decreased platelet counts and increased bleeding risk. Objectives To evaluate the efficacy and safety of avatrombopag, a second-generation oral thrombopoietin receptor agonist, for the treatment of Chinese patients with chronic primary ITP. Methods This multicenter, randomized, double-blind, placebo-controlled phase 3 study (CTR20210431) consisted of a 6-week double-blind core treatment phase followed by a 20-week, open-label extension phase. Chinese adults with chronic primary ITP for at least 12 months and a platelet count <30 × 109/L were randomized (2:1) to receive avatrombopag (initial dose of 20 mg/day) or matched placebo. The primary endpoint was the proportion of subjects with a platelet count ≥50 × 109/L at week 6 of the core treatment phase in absence of rescue therapy. Results In total, 74 patients were randomized (avatrombopag: N = 48; placebo: N = 26) between March 5, 2021, and August 6, 2021; all of whom entered the extension phase (72 received avatrombopag up to 26 weeks). At week 6 of the core study, the platelet response (≥50 x 109/L) rate was significantly higher in the avatrombopag group (77.1%; 95% CI, 62.7, 88.0) vs placebo (7.7%; 95% CI, 1.0, 25.1); the treatment difference was 69.4% (95% CI, 56.2, 86.3; P < .0001). During the 6-week core study, treatment-emergent adverse events were reported in 41 (85.4%) and 20 (76.9%) patients in the avatrombopag and placebo groups, respectively. The most common avatrombopag-related treatment-emergent adverse events were upper respiratory tract infection (14/48 [29.2%]), increased platelet count (13/48 [27.1%]) and headache (7/48 [14.6%]). Conclusion Avatrombopag was efficacious and generally well tolerated in Chinese patients with chronic primary ITP, with comparable efficacy and safety to previous reports in Western patients.
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Affiliation(s)
- Heng Mei
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hu Zhou
- Department of Hematology, The Affiliated Cancer Hospital of Zhengzhou University and Henan Cancer Hospital, Zhengzhou, China
| | - Ming Hou
- Department of Hematology, Qilu Hospital of Shandong University, Shandong University, Jinan, China
| | - Jing Sun
- Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Lei Zhang
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Tianjin Key Laboratory of Gene Therapy for Blood Diseases, CAMS Key Laboratory of Gene Therapy for Blood Diseases, Tianjin, China
- Tianjin Institute of Health Science, Tianjin, China
| | - Jianmin Luo
- Department of Hematology, The Second Hospital of Hebei Medical University, Shijiazhuang, China
| | - Zhongxing Jiang
- Department of Hematology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xu Ye
- Department of Hematology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yajing Xu
- Department of Hematology, Xiangya Hospital, Central South University; Hunan Hematology Oncology Clinical Medical Research Center, Changsha, China
| | - Jun Lu
- R&D Center, Fosun Pharma, Shanghai, China
| | - Hui Wang
- R&D Center, Fosun Pharma, Shanghai, China
| | - Aimin Hui
- R&D Center, Fosun Pharma, Shanghai, China
| | | | - Yu Hu
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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10
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Shen N, Qiao J, Jiang Y, Yin H, Li M, Zhu S, Li J. Safety of non‑peptide thrombopoietin receptor agonists in patients with immune thrombocytopenia: A systematic review and meta‑analysis of short‑term double‑blind randomized clinical trials. Exp Ther Med 2023; 26:393. [PMID: 37456173 PMCID: PMC10347292 DOI: 10.3892/etm.2023.12092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 06/16/2023] [Indexed: 07/18/2023] Open
Abstract
The aim of the present study was to analyze the safety of non-peptide thrombopoietin receptor agonists (TPO-RAs) for immune thrombocytopenia (ITP) treatment. All studies reporting adverse events (AEs) in relation to ITP treatment with eltrombopag, avatrombopag, and hetrombopag were retrieved from PubMed, Web of Science, and Embase databases. RevMan 5.4.1 was used for meta-analysis, heterogeneity and bias analyses. A total of 1,078 patients from seven eligible studies were enrolled. In the enrolled clinical trials, the double-blind period was between 6 weeks and 6 months. The results revealed that the chances of any AEs [relative risk (RR)=1.16; 95% confidence interval (CI), 0.90-1.51; I2=78%; P=0.26], grade 3/4 AEs (RR=1.07; 95% CI, 0.63-1.80; I2=0%; P=0.81), elevated transaminase levels (RR=1.09; 95% CI, 0.68-1.74; I2=0%; P=0.72), thrombosis (RR=1.92; 95% CI, 0.55-6.66; I2=0%; P=0.31) and cataracts (RR=0.83; 95% CI, 0.38-1.83; I2=0%; P=0.65) were not significantly higher in patients with ITP that received non-peptide TPO-RAs compared with patients with ITP treated with a placebo. The present study indicated that non-peptide TPO-RAs were relatively safe for patients with ITP, at least within 6 months of administration.
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Affiliation(s)
- Nan Shen
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu 223800, P.R. China
- Department of Hematology, The Children's Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China
| | - Jibing Qiao
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu 223800, P.R. China
| | - Yazhou Jiang
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu 223800, P.R. China
| | - Hanjun Yin
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu 223800, P.R. China
| | - Min Li
- Department of Hematology, The Children's Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China
| | - Suyue Zhu
- Department of Pediatrics, Suqian Hospital Affiliated to Xuzhou Medical University, Suqian, Jiangsu 223800, P.R. China
| | - Jianqin Li
- Department of Hematology, The Children's Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China
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11
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Oladapo A, Kolodny S, Vredenburg M, Swallow E, Goldschmidt D, Sarathy K, Lopez P, Maitland H, Yee J. Avatrombopag treatment response in patients with immune thrombocytopenia: the REAL-AVA 1.0 study. Ther Adv Hematol 2023; 14:20406207231179856. [PMID: 37465395 PMCID: PMC10350755 DOI: 10.1177/20406207231179856] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Accepted: 05/15/2023] [Indexed: 07/20/2023] Open
Abstract
Background Thrombopoietin-receptor agonists (TPO-RAs) are used to treat immune thrombocytopenia (ITP), a disorder characterized by prolonged low platelet counts (PCs) that pose a risk of serious bleeding episodes. Avatrombopag (AVA) is the most recently approved TPO-RA for the treatment of chronic ITP. A high proportion of patients responded to AVA in clinical trials, and treatment was well-tolerated; however, limited real-world effectiveness data have been reported to date. Objectives To describe demographic and clinical characteristics, treatment patterns, and outcomes following the initiation of AVA in patients with ITP in the United States. Design This is a retrospective study using administrative claims data from the Komodo Healthcare Map (1 February 2017 to 28 February 2022) linked with PC laboratory data. Methods Patients with ⩾1 diagnosis of ITP, ⩾1 paid prescription for AVA (index date), and ⩾1 month of pharmacy coverage after AVA initiation were selected. Baseline characteristics and follow-up steroid, immunosuppressant, and rescue medication use were described. The percentage of patients achieving clinically meaningful PC thresholds (⩾30 × 109/l) were assessed among patients with ⩾1 PC following AVA initiation and prior to AVA discontinuation/switch (effectiveness subgroup). Results A total of 205 patients met eligibility criteria and 49% reported TPO-RA use in the prior 6 months. Approximately 70% and 93% of patients did not require use of steroid or immunoglobulin rescue medication during follow-up, respectively. Among patients with concomitant steroid (n = 75) or immunosuppressant (n = 7) use at AVA initiation, 35% and 57% discontinued those treatments, respectively. Of the 21 patients in the effectiveness subgroup, 81% achieved clinically meaningful PC thresholds. Conclusion A high proportion of evaluable patients with ITP in this real-world study achieved clinically meaningful PCs, without requiring rescue medication during AVA treatment, with many able to discontinue baseline concomitant steroid or immunosuppressant utilization. Despite limited availability of PC data, these results are consistent with results from the AVA pivotal clinical trials.
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Affiliation(s)
- Abiola Oladapo
- Sobi Inc., 77 CityPoint, Fourth Avenue, Suite 300, Waltham, MA 02451, USA
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12
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Lebowa W, Zdziarska J, Sacha T. Avatrombopag increased platelet count in a patient with chronic immune thrombocytopenia refractory to multiple lines of treatment. Blood Coagul Fibrinolysis 2023; 34:327-332. [PMID: 37395226 PMCID: PMC10942213 DOI: 10.1097/mbc.0000000000001232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 05/17/2023] [Indexed: 07/04/2023]
Abstract
We present a case of a 30-year-old man suffering from chronic refractory immune thrombocytopenia (ITP) from early childhood. The patient was treated with all the therapeutic methods available in Poland, without platelet response: corticosteroids, intravenous immunoglobulins, splenectomy, cyclophosphamide, vinblastine, azathioprine, mycophenolate mofetil, rituximab, ciclosporin A, romiplostim, and eltrombopag. He continued to function persistently with deep thrombocytopenia, symptoms of hemorrhagic diathesis, and one episode of spontaneous subarachnoid bleeding. In April 2022, at the age of 29, the patient received avatrombopag. Within 4 weeks of starting avatrombopag 20 mg daily for 2 weeks and then 40 mg daily, he reached a platelet (PLT) count of 67 x 10 9 /l. In the next month, platelets fell below 30 x 10 9 /l, but subsequently the count increased to 47 x 10 9 /l, then to 52 x 10 9 /l, and remained stable. The symptoms of cutaneous hemorrhage diathesis have resolved completely since avatrombopag was introduced and did not reappear despite the decrease in PLT count.
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Affiliation(s)
- Weronika Lebowa
- Department of Hematology, University Hospital, Jagiellonian University Medical College
- Jagiellonian University Medical College, Doctoral School of Medical and Health Sciences, Faculty of Medicine, Cracow, Poland
| | - Joanna Zdziarska
- Department of Hematology, University Hospital, Jagiellonian University Medical College
| | - Tomasz Sacha
- Department of Hematology, University Hospital, Jagiellonian University Medical College
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13
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Cheng X, Wang Z, Dong S, Ma J, Meng J, Wang X, Wu R. Outcomes of switching to avatrombopag following treatment failure with eltrombopag in paediatric immune thrombocytopenia: A real-world study in China. Br J Haematol 2023. [PMID: 37188335 DOI: 10.1111/bjh.18864] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 05/17/2023]
Abstract
Immune thrombocytopenia (ITP) is an autoimmune bleeding disorder characterized by isolated thrombocytopenia and a haemorrhagic risk. Thrombopoietin receptor agonists (TPO-RAs) are highly effective for ITP and are widely used to treat patients with steroid treatment failure or dependency. However, although treatment response to TPO-RAs may differ according to the type, the potential impact of switching from eltrombopag (ELT) to avatrombopag (AVA) with respect to efficacy or tolerance in children remains unknown. This study aimed to evaluate the outcomes of switching from ELT to AVA in paediatric patients with ITP. We retrospectively evaluated children with chronic immune thrombocytopenia (cITP) switched from ELT to AVA owing to treatment failure at the Hematology-Oncology Center of Beijing Children's Hospital between July 2021 and May 2022. Overall, 11 children (seven and four boys and girls respectively) with a median age of 8.3 (range: 3.8-15.3) years were included. The overall response and complete response (platelet [PLT] count ≥100 × 109 /L) rates during AVA treatment were 81.8% (9/11) and 54.6% (6/11) respectively. The median PLT count was significantly increased from ELT to AVA (7 [range: 2-33] × 109 /L vs. 74 [15-387] × 109 /L; p = 0.007). The median time to PLT count ≥30 × 109 /L was 18 (range: 3-120) days. Overall, 7/11 patients (63.6%) used concomitant medications, and concomitant medication use was gradually discontinued within 3-6 months after AVA initiation. In conclusion, AVA after ELT is effective in the heavily pretreated paediatric cITP population, with high response rates even in those with an inadequate response to a prior TPO-RA.
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Affiliation(s)
- Xiaoling Cheng
- Department of Pharmacy, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Zhifa Wang
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Shuyue Dong
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jingyao Ma
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Jinxi Meng
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Xiaoling Wang
- Department of Pharmacy, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Runhui Wu
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, Beijing, China
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14
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González-López TJ, Newland A, Provan D. Current Concepts in the Diagnosis and Management of Adult Primary Immune Thrombocytopenia: Our Personal View. Medicina (Kaunas) 2023; 59:815. [PMID: 37109773 PMCID: PMC10143742 DOI: 10.3390/medicina59040815] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/15/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023]
Abstract
Primary immune thrombocytopenia (ITP) is an acquired blood disorder that causes a reduction in circulating platelets with the potential for bleeding. The incidence of ITP is slightly higher in adults and affects more women than men until 60 years, when males are more affected. Despite advances in basic science, primary ITP remains a diagnosis of exclusion. The disease is heterogeneous in its clinical behavior and response to treatment. This reflects the complex underlying pathophysiology, which remains ill-understood. Platelet destruction plays a role in thrombocytopenia, but underproduction is also a major contributing factor. Active ITP is a proinflammatory autoimmune disease involving abnormalities within the T and B regulatory cell compartments, along with several other immunological abnormalities. Over the last several years, there has been a shift from using immunosuppressive therapies for ITP towards approved treatments, such as thrombopoietin receptor agonists. The recent COVID-19 pandemic has hastened this management shift, with thrombopoietin receptor agonists becoming the predominant second-line treatment. A greater understanding of the underlying mechanisms has led to the development of several targeted therapies, some of which have been approved, with others still undergoing clinical development. Here we outline our view of the disease, including our opinion about the major diagnostic and therapeutic challenges. We also discuss our management of adult ITP and our placement of the various available therapies.
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Affiliation(s)
| | - Adrian Newland
- Academic Haematology Unit, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 2BB, UK
| | - Drew Provan
- Academic Haematology Unit, Blizard Institute, Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 2BB, UK
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15
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Song AB, Al-Samkari H. Emerging data on thrombopoietin receptor agonists for management of chemotherapy-induced thrombocytopenia. Expert Rev Hematol 2023; 16:365-375. [PMID: 37039010 DOI: 10.1080/17474086.2023.2201428] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
Abstract
INTRODUCTION Chemotherapy induced thrombocytopenia (CIT) is a common complication of cancer treatment, frequently leads to reduced relative dose intensity, and is associated with reduced survival. Given the lack of FDA-approved therapies for CIT, thrombopoietin receptor agonists (TPO-RAs) have received significant attention for treatment and prevention of CIT. AREAS COVERED This review will summarize the development of prior agents for treatment of CIT, discuss the existing literature investigating the use of TPO-RAs in CIT primarily in patients with solid tumor malignancies, and offer insights on the future direction of TPO-RAs and other therapeutics for CIT. EXPERT OPINION In alignment with NCCN guidelines, we recommend that patients with CIT participate in a clinical trial for consideration of TPO-RA treatment or consider off-label use of romiplostim when participation in clinical trials is not possible. The literature to date supports the use of TPO-RAs for treatment of persistent CIT. Further data is needed to describe the long-term efficacy, safety, and prescribing practices of TPO-RAs in a diverse patient population with a variety of tumor types and chemotherapy regimens in addition to exploring the underlying biology of CIT.
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Affiliation(s)
- Andrew B Song
- Department of Medicine, Massachusetts General Hospital, Boston, MA, USA
- Harvard Medical School, Boston, MA, USA
| | - Hanny Al-Samkari
- Harvard Medical School, Boston, MA, USA
- Division of Hematology, Massachusetts General Hospital, Boston, MA, USA
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16
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Liu E, Fang P, Xin H, Li S, Liu Y, Xu Y, Chen Y. Efficacy and safety of avatrombopag for thrombocytopenia following allogeneic hematopoietic stem cell transplantation: A real-world data evaluation on 14 cases. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2023; 48:376-385. [PMID: 37164921 PMCID: PMC10930078 DOI: 10.11817/j.issn.1672-7347.2023.220600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Indexed: 05/12/2023]
Abstract
OBJECTIVES Thrombocytopenia following allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a common and serious complication that leads to an increased risk of bleeding and poor prognosis. Traditional strategies consist of platelet transfusion, glucocorticoid therapy, intravenous human immunoglobulin, recombinant human thrombopoietin injection, and CD34+-selected hematopoietic stem cell transplantation, but the effects of these treatments are not satisfactory and the treatment continues to be challenged. This study aims to determine the treating efficacy of avatrombopag, a novel thrombopoietin receptor agonist, on thrombocytopenia after allo-HSCT, and to increase the evidence-based medical evidence for the clinical use of this drug. METHODS Fourteen patients with thrombocytopenia after allo-HSCT underwent avatrom-bopag treatment from September 2020 to September 2021 were retrospectively studied. Of these patients, 8 patients had delayed platelet engraftment (DPE) and 6 cases had secondary failure of platelet recovery (SFPR). The efficacy and safety of the treatment and the survival of the patients were assessed. RESULTS The median treatment time of avatrombopag was 34 days, and no patients stopped treatment due to adverse reactions or drug intolerance. Compared with the treatment before, the levels of platelet count, megakaryocytes, and hemoglobin in patients were significantly increased (P=0.000 1, P=0.001 0, and P=0.001 7, respectively). The optimal platelet count of 13 patients reached the complete response standard after drug withdrawal. The median follow-up time of 14 patients was 371 days, and the 2-year overall survival rate was 78.6%. CONCLUSIONS Avatrombopag is effective on increasing platelet counts in patients with thrombocytopenia after allo-HSCT, with a good safety profile. It is a suitable therapeutic option for thrombocytopenia after allo-HSCT.
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Affiliation(s)
- Enyi Liu
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha 410008.
- Hunan Hematologic Neoplasms Clinical Medical Research Center, Changsha 410008.
- National Clinical Research Center for Hematologic Diseases, First Affiliated Hospital of Soochow University, Suzhou Jiangshu 215006, China.
| | - Peng Fang
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha 410008
- Hunan Hematologic Neoplasms Clinical Medical Research Center, Changsha 410008
- National Clinical Research Center for Hematologic Diseases, First Affiliated Hospital of Soochow University, Suzhou Jiangshu 215006, China
| | - Hongya Xin
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha 410008
- Hunan Hematologic Neoplasms Clinical Medical Research Center, Changsha 410008
- National Clinical Research Center for Hematologic Diseases, First Affiliated Hospital of Soochow University, Suzhou Jiangshu 215006, China
| | - Shujun Li
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha 410008
- Hunan Hematologic Neoplasms Clinical Medical Research Center, Changsha 410008
- National Clinical Research Center for Hematologic Diseases, First Affiliated Hospital of Soochow University, Suzhou Jiangshu 215006, China
| | - Yi Liu
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha 410008
- Hunan Hematologic Neoplasms Clinical Medical Research Center, Changsha 410008
- National Clinical Research Center for Hematologic Diseases, First Affiliated Hospital of Soochow University, Suzhou Jiangshu 215006, China
| | - Yajing Xu
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha 410008
- Hunan Hematologic Neoplasms Clinical Medical Research Center, Changsha 410008
- National Clinical Research Center for Hematologic Diseases, First Affiliated Hospital of Soochow University, Suzhou Jiangshu 215006, China
| | - Yan Chen
- Department of Hematology, Xiangya Hospital, Central South University, Changsha 410008.
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Changsha 410008.
- Hunan Hematologic Neoplasms Clinical Medical Research Center, Changsha 410008.
- National Clinical Research Center for Hematologic Diseases, First Affiliated Hospital of Soochow University, Suzhou Jiangshu 215006, China.
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17
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González-López TJ, Provan D. Sustained Remission Off-Treatment (SROT) of TPO-RAs: The Burgos Ten-Step Eltrombopag Tapering Scheme. Medicina (Kaunas) 2023; 59:659. [PMID: 37109617 PMCID: PMC10145072 DOI: 10.3390/medicina59040659] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/15/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023]
Abstract
Background and Objectives: TPO-RAs (romiplostim/eltrombopag/avatrombopag) have broadly demonstrated high efficacy rates (59-88%), durable responses (up to three years) and a satisfactory safety profile in clinical trials. The effect of TPO-RAs is classically considered to be transient because platelet numbers usually dropped rapidly to baseline unless therapy was maintained. However, several groups have reported the possibility of successfully discontinuing TPO-RAs in some patients without further need for concomitant treatments. This concept is usually referred as sustained remission off-treatment (SROT). Materials and Methods: Unfortunately, we still lack predictors of the response to discontinuation even after the numerous biological, clinical and in vitro studies performed to study this phenomenon. The frequency of successful discontinuation is matter of controversy, although a percentage in the range of 25-40% may probably be considered a consensus. Here, we describe all major routine clinical practice studies and reviews that report the current position on this topic and compare them with our own results in Burgos. Results: We report our Burgos ten-step eltrombopag tapering scheme with which we have achieved an elevated percentage rate of success (70.3%) in discontinuing treatment. Conclusions: We hope this protocol may help successfully taper and discontinue TPO-RAs in daily clinical practice.
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Affiliation(s)
| | - Drew Provan
- Academic Haematology Unit, Blizard Institute, Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London E1 2BB, UK;
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18
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Ruan Y, Cao W, Luo T, Liu X, Liu Q, Xiao Y, Wu C, Xie D, Ren Y, Wu X, Feng X. Avatrombopag for the treatment of thrombocytopenia in children's patients following allogeneic hematopoietic stem-cell transplantation: A pilot study. Front Pediatr 2023; 11:1099372. [PMID: 36873638 PMCID: PMC9975496 DOI: 10.3389/fped.2023.1099372] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 01/30/2023] [Indexed: 02/17/2023] Open
Abstract
Thrombocytopenia following allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a common and life-threatening complication. Thus, new prevention and treatment strategies for post-HSCT thrombocytopenia are urgently required. In recent studies, thrombopoietin receptor agonists (TPO-RA) for treating post-HSCT thrombocytopenia indicated efficiency and safety. The improved effect of post-HSCT thrombocytopenia in adults was found in the administration of avatrombopag which was a new TPO-RA. However, there was no relevant study in the children's cohort. Herein, we retrospectively analyzed the effect of avatrombopag in post-HSCT thrombocytopenia in children. As a result, the overall response rate (ORR) and complete response rate (CRR) were 91% and 78%, respectively. Furthermore, both cumulative ORR and CRR were significantly lower in the poor graft function (PGF)/secondary failure of platelet recovery (SFPR) group compared to the engraftment-promotion group (86.7% vs. 100%, p = 0.002 and 65.0% vs. 100%, p < 0.001, respectively). Achieving OR required a median of 16 days in the PGF/SFPR group while 7 days in the engraftment-promotion group (p = 0.003). Grade III-IV acute graft vs. host disease and inadequate megakaryocytes were identified as risk factors of CRR only in univariate analysis (p = 0.03 and p = 0.01, respectively). No severe adverse events were documented. Conclusively, avatrombopag is an alternatively efficient and safe agent for treating post-HSCT thrombocytopenia in children.
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Affiliation(s)
- Yongsheng Ruan
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Wei Cao
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Tingting Luo
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xuan Liu
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Qiujun Liu
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yuhua Xiao
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Cuiling Wu
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Danfeng Xie
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yuqiong Ren
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xuedong Wu
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Xiaoqin Feng
- Department of Pediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, China
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19
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Zhou M, Qi J, Gu C, Wang H, Zhang Z, Wu D, Han Y. Avatrombopag for the treatment of thrombocytopenia post hematopoietic stem-cell transplantation. Ther Adv Hematol 2022; 13:20406207221127532. [PMID: 36185780 PMCID: PMC9523859 DOI: 10.1177/20406207221127532] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 08/23/2022] [Indexed: 11/24/2022] Open
Abstract
Background: Thrombocytopenia post hematopoietic stem-cell transplantation (HCT) usually contributes to poor outcomes with no standardized treatment. Eltrombopag and romiplostim can be feasible for post-HCT thrombocytopenia, but the use of avatrombopag has not yet been evaluated. Objectives: We aimed to evaluate the efficacy and safety of avatrombopag treatment in patients diagnosed with post-HCT thrombocytopenia. Design: In this retrospective study, we evaluated the efficacy and safety of avatrombopag treatment in a cohort of 61 patients diagnosed with thrombocytopenia post HCT in our clinical center. Methods: Avatrombopag was initiated at 20 mg daily, with a dosage adjustment to achieve platelet recovery to >20 × 109/l independent from transfusion for 7 consecutive days (overall response, OR) or to >50 × 109/l free from transfusion for 7 consecutive days (complete response, CR). Factors influencing OR and CR were studied in univariate and multivariate analyses, respectively. Within the follow-up, adverse events like myelofibrosis, thrombosis, and organ toxicities were monitored carefully. Results: The overall response rate (ORR) to avatrombopag was 68.9% and the cumulative incidence (CI) of OR was 69.1%. The complete response rate (CRR) and the CI of CR were both 39.3%. The median days from avatrombopag initiation to OR and CR were 21 and 25 days, respectively. An adequate number of megakaryocytes before the initiation of avatrombopag was an independent protective factor of avatrombopag treatment for OR (hazard ratio, HR = 4.628, 95% confidence interval 1.92–11.15, p = 0.0006) and CR (HR = 4.892, 95% confidence interval 1.58–15.18, p = 0.006). Avatrombopag was well tolerated in all patients with no severe adverse events. Conclusion: Our findings suggested that avatrombopag can be optional for thrombocytopenia post HCT.
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Affiliation(s)
- Meng Zhou
- National clinical research center for hematologic diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Jiaqian Qi
- National clinical research center for hematologic diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Chengyuan Gu
- National clinical research center for hematologic diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Hong Wang
- National clinical research center for hematologic diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Ziyan Zhang
- National clinical research center for hematologic diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China
| | - Depei Wu
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China.,State Key Laboratory of Radiation Medicine and Protection, Soochow University, 188 Shizi Street, Suzhou, Jiangsu province, China 215006
| | - Yue Han
- National Clinical Research Center for Hematologic Diseases, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Institute of Blood and Marrow Transplantation, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Suzhou, China.,State Key Laboratory of Radiation Medicine and Protection, Soochow University, 188 Shizi Street, Suzhou, Jiangsu province, China 215006
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20
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Lu J, Jamieson BD, Hui AM. Avatrombopag ethnic sensitivity analysis in chronic liver disease and thrombocytopenia patients: individual-level pooled analysis. Therap Adv Gastroenterol 2022; 15:17562848221105976. [PMID: 35795378 PMCID: PMC9252017 DOI: 10.1177/17562848221105976] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 05/19/2022] [Indexed: 02/04/2023] Open
Abstract
INTRODUCTION Few data have been published on the ethnic sensitivity of effectiveness, pharmacokinetics (PK), and pharmacodynamics (PD) of avatrombopag for the management of thrombocytopenia in patients with chronic liver disease (CLD). METHODS An ethnic sensitivity analysis was performed based on the results from two phase III studies (ADAPT-1 and ADAPT-2), with a primary endpoint of the proportion of patients without the requirement of platelet transfusion or rescue treatment for bleeding after randomization to 7 days following a scheduled procedure, and three phase I studies in healthy subjects. Cochran-Mantel-Haenszel and Fisher's exact tests were used to compare the differences in effectiveness in different ethnicities and overall population. RESULTS In total, 435 patients (placebo, n = 158; avatrombopag, n = 277) were stratified into various ethnic groups: 121 East Asians, including the subgroup of 27 Chinese, and 259 Caucasians. The proportion of patients who did not receive a platelet transfusion and those with a platelet count ⩾50 × 109/L in the avatrombopag 40 and 60 mg groups were higher than that of placebo for all ethnicities and in the overall population. Statistical significance was obtained in the overall population and for all ethnicities other than Chinese patients, a group with a very small sample size. No significant difference was observed in the proportion of responders in each ethnic group compared to overall population (p > 0.05). The incidence of adverse events in East Asians was similar to that in both Caucasians and the overall population. CONCLUSION Avatrombopag was effective and safe in the management of thrombocytopenia in Chinese patients with CLD. Ethnicity does not appear to influence the efficacy, safety, PK, or PD of avatrombopag.
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Affiliation(s)
- Jun Lu
- Clinical Research Department, Shanghai Fosun Pharmaceutical Development, Co., Ltd, Shanghai, China
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21
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Zhu L, Liu J, Kong P, Gao S, Wang L, Liu H, Zhang C, Gao L, Feng Y, Chen T, Gao L, Zhang X. Analysis of the Efficacy and Safety of Avatrombopag Combined With MSCs for the Treatment of Thrombocytopenia After Allogeneic Hematopoietic Stem Cell Transplantation. Front Immunol 2022; 13:910893. [PMID: 35693772 PMCID: PMC9184517 DOI: 10.3389/fimmu.2022.910893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Accepted: 04/29/2022] [Indexed: 01/05/2023] Open
Abstract
Platelet graft failure (PGF) is a frequent and serious complication after Allogeneic hematopoietic stem cell transplantation (allo-HSCT) and lacks effective treatment strategies, which could affect the prognosis of patients and even cause death. The exact underlying mechanism of PGF remains unclear, and lacks standard treatment. Here, we conduct a retrospective study to evaluate the efficacy and safety of avatrombopag combined with mesenchymal stem cells (MSCs) in 16 patients with thrombocytopenia after allo-HSCT. Patients were administered the following treatment regimen: 20 mg/d avatrombopag; if the PLT count was less than 50×10^9/L for at least 2 weeks, the dose was increased to 40 mg/d; if the PLT count was 200-400×10^9/L, the dose was reduced; and if the PLT count was greater than 400×10^9/L, avatrombopag was terminated. Umbilical cord MSCs (1×10^6 cells/kg) infusion was performed every week for 4-6 weeks. Among the 16 patients, 13 patients (81.3%) achieved a complete response (CR), 2 patients (12.5%) got a partial response (PR), and 1 patient (6.3%) had no response (NR). The median time to obtain CR was 32 (7-426) days after treatment with avatrombopag combined with umbilical cord MSCs. The time to reach 20×10^9/L≤ PLT <50×10^9/L in the 2 patients with PR was 52 and 230 days after treatment, respectively. One patient had a severe pulmonary infection and died of cytomegalovirus pneumonia. Overall, our results indicated that combination of avatrombopag with MSCs can promote platelet recovery after transplantation, thereby improving the survival rate of patients and improving the quality of life of patients after transplantation, and providing a new method and strategy for the treatment of thrombocytopenia after allo-HSCT.
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22
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Tsykunova G, Ghanima W. Avatrombopag for the Treatment of Adult Patients with Chronic Immune Thrombocytopenia (cITP): Focus on Patient Selection and Perspectives. Ther Clin Risk Manag 2022; 18:273-286. [PMID: 35386180 PMCID: PMC8977771 DOI: 10.2147/tcrm.s251672] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 02/28/2022] [Indexed: 11/23/2022] Open
Abstract
Immune thrombocytopenia (ITP) is an autoimmune disorder characterized by a reduced number of circulating platelets due to immune-mediated destruction and decreased platelet production in the bone marrow. Thrombopoietin receptor agonists (TPO-RAs) are highly effective and widely used in the treatment of patients with steroid treatment failure or dependency. Avatrombopag represents a new supplement to the TPO-RAs family. It was originally approved for the treatment of thrombocytopenia in patients with chronic liver disease who are scheduled to undergo an invasive procedure. However, labeled indications for avatrombopag have been relatively recently expanded to include treatment of chronic ITP in adults with insufficient response to the previous treatments. In this article, we provide an overview of pharmacodynamics and pharmacokinetics of avatrombopag as well as results of the clinical trials related to safety and efficacy of avatrombopag with a perspective on current clinical use. Available data so far suggests that avatrombopag can be effectively used in ITP patients and has a favorable safety profile. Though further studies are needed to affirm the efficacy and safety, avatrombopag has the potential to become a TPO agonist of choice for many patients with ITP.
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Affiliation(s)
- Galina Tsykunova
- Department of Hematology, Haukeland University Hospital, Bergen, Norway.,Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Hemato-Oncology, Østfold Hospital, Grålum, Norway
| | - Waleed Ghanima
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Hemato-Oncology, Østfold Hospital, Grålum, Norway.,Department of hematology, Oslo University Hospital and Institute of Clinical Medicine, University of Oslo, Oslo, Norway
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23
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Eguchi Y, Takahashi H, Mappa S, Santagostino E. Phase 2 study of avatrombopag in Japanese patients with chronic liver disease and thrombocytopenia. Hepatol Res 2022; 52:371-380. [PMID: 35134259 DOI: 10.1111/hepr.13755] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/07/2022] [Accepted: 01/15/2022] [Indexed: 12/13/2022]
Abstract
AIM Avatrombopag, a thrombopoietin receptor agonist, can reduce the need for platelet transfusions or rescue interventions for bleeding in patients with chronic liver disease (CLD) and thrombocytopenia undergoing scheduled procedures. A model analysis indicated that the effect of avatrombopag on platelet production was reduced in East Asian versus non-East Asian patients; however, the difference was deemed not clinically significant. Furthermore, a subgroup analysis of pooled Phase 3 trials showed similar avatrombopag efficacy across racial subgroups. The aim of this Phase 2 study was to corroborate the efficacy and safety of avatrombopag in Japanese patients with thrombocytopenia due to CLD. METHODS Japanese patients with CLD and thrombocytopenia were randomized to receive placebo or avatrombopag 20, 40, or 60 mg daily for 5 days. The primary endpoint was responder rate in platelet counts at Visit 4 (10-13 days after treatment initiation), defined as the proportion of patients with platelet count ≥50 × 109 /L and ≥20 × 109 /L increase from baseline. RESULTS Thirty-nine patients were randomized and completed the study (placebo, n = 11; avatrombopag 20 mg, n = 7; 40 mg, n = 11; 60 mg, n = 10). Avatrombopag treatment was associated with significant increases in responder rate at Visit 4 in the 40 mg (63.6%; p = 0.004) and 60 mg (40%; p = 0.024) groups versus placebo (9.1%). Avatrombopag was well tolerated and no new safety signals were detected. CONCLUSIONS Efficacy and safety results from this study were consistent with previous studies in patients with CLD and thrombocytopenia undergoing elective procedures, supporting treatment with avatrombopag in the Japanese population. CLINICALTRIALS gov identifier: NCT02227693.
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Affiliation(s)
| | - Hirokazu Takahashi
- Liver Center, Saga University Hospital, Faculty of Medicine, Saga University, Saga, Japan
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24
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Al-Samkari H, Jiang D, Gernsheimer T, Liebman H, Lee S, Wojdyla M, Vredenburg M, Cuker A. Adults with immune thrombocytopenia who switched to avatrombopag following prior treatment with eltrombopag or romiplostim: A multicentre US study. Br J Haematol 2022; 197:359-366. [PMID: 35179784 PMCID: PMC9306832 DOI: 10.1111/bjh.18081] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 01/15/2022] [Accepted: 01/26/2022] [Indexed: 12/12/2022]
Abstract
Patients with immune thrombocytopenia (ITP) may respond to one thrombopoietin receptor agonist (TPO-RA) but not another. Limited data are available describing outcomes in patients who switched from romiplostim or eltrombopag to avatrombopag, a newer oral TPO-RA. We performed a retrospective observational study of adults with ITP who switched from eltrombopag or romiplostim to avatrombopag at four US tertiary ITP referral centres. Forty-four patients were included, with a mean ITP duration of 8.3 years and a median (range) of four prior ITP treatments. On avatrombopag, 41/44 patients (93%) achieved a platelet response (≥50 × 109 /l) and 38/44 patients (86%) achieved a complete response (≥100 × 109 /l). In all patients, the median platelet count on eltrombopag or romiplostim was 44 × 109 /l vs 113 × 109 /l on avatrombopag (p < 0.0001); in patients switched for ineffectiveness of romiplostim/eltrombopag, it was 28 × 109 /l on romiplostim/eltrombopag vs 88 × 109 /l on avatrombopag (p = 0.025). Fifty-seven percent of patients receiving concomitant ITP medications before switching discontinued them after switching, including 63% of patients receiving chronic corticosteroids. In a heavily pretreated chronic ITP population, avatrombopag was effective following therapy with romiplostim or eltrombopag, with high response rates even in patients with inadequate response to a prior TPO-RA.
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Affiliation(s)
- Hanny Al-Samkari
- Division of Hematology, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Debbie Jiang
- Division of Hematology, University of Washington, Seattle, Washington, USA.,Seattle Cancer Care Alliance, Seattle, Washington, USA
| | - Terry Gernsheimer
- Division of Hematology, University of Washington, Seattle, Washington, USA.,Seattle Cancer Care Alliance, Seattle, Washington, USA
| | - Howard Liebman
- Hematology, University of Southern California-Keck School of Medicine, California, Los Angeles, USA
| | - Susie Lee
- Hematology, University of Southern California-Keck School of Medicine, California, Los Angeles, USA
| | - Matthew Wojdyla
- Dova Pharmaceuticals, a Sobi company, Durham, North Carolina, USA
| | | | - Adam Cuker
- Department of Medicine and Department of Pathology & Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
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25
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Tu X, Xue A, Wu S, Jin M, Zhao P, Zhang H. Case Report: Successful Avatrombopag Treatment for Two Cases of Anti-PD-1 Antibody-Induced Acquired Amegakaryocytic Thrombocytopenia. Front Pharmacol 2022; 12:795884. [PMID: 35153753 PMCID: PMC8830913 DOI: 10.3389/fphar.2021.795884] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 12/20/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Anti-PD-1/PD-L1 immunotherapy has achieved impressive responses in multiple types of malignancies in recent years. However, immune-related adverse events (irAEs) occur and limit their continuous clinical use. Among these irAEs, acquired amegakaryocytic thrombocytopenia (AAT) is rare but often clinically serious, life-threatening and refractory to multiple treatment approaches. Case summary: We reported for the first time the successful treatment of avatrombopag in two cases of anti-PD1 antibody-induced AAT (in particular, one case had progressed to aplastic anemia), which was refractory or intolerant to glucocorticoids, ciclosporin, intravenous immunoglobulin (IVIG), recombinant human thrombopoietin (rh-TPO) and even TPO receptor agonist (TPO-RA) eltrombopag. To date, the two cases manifested as normal platelet counts and are independent of transfusion. Conclusion: Anti-PD1 antibody-induced AAT occurs with low frequency but is often serious and difficult to manage, for which this study proposed vatrombopag as a potential curative and safe approach.
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Affiliation(s)
- Xiaofang Tu
- Department of Hematology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Ali Xue
- Department of Hematology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Suye Wu
- Department of Hematology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Mengmeng Jin
- Department of Hematology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Pu Zhao
- Department of Hematology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Hao Zhang
- Department of Hematology, The Third Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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26
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Flisiak R, Antonov K, Drastich P, Jarcuska P, Maevskaya M, Makara M, Puljiz Ž, Štabuc B, Trifan A. Practice Guidelines of the Central European Hepatologic Collaboration (CEHC) on the Use of Thrombopoietin Receptor Agonists in Patients with Chronic Liver Disease Undergoing Invasive Procedures. J Clin Med 2021; 10:jcm10225419. [PMID: 34830701 PMCID: PMC8625449 DOI: 10.3390/jcm10225419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 11/01/2021] [Accepted: 11/17/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Second-generation thrombopoietin receptor agonists (TPO-RAs) are emerging as the new standard for managing thrombocytopenia (TCP) in patients with chronic liver diseases (CLDs) undergoing scheduled procedures. However, practical guidance for their routine use in CLD patients undergoing specific invasive procedures is lacking. METHODS These practice guidelines were developed by the Initiative Group for Central European Hepatologic Collaboration (CEHC), composed of nine hepatologist/gastroenterologist experts from Central Europe. Using an adapted Delphi process, the CEHC group selected ten invasive procedures most relevant to the hepatology/gastroenterology setting in the region. Consensus recommendations for each invasive procedure are reported as a final percentage of expert panel responses. RESULTS A consensus was agreed that TPO-RAs should be considered for raising platelet count in CLD patients undergoing scheduled abdominal surgery, high-bleeding risk dentistry, endoscopic polypectomy, endoscopic variceal ligation, liver biopsy, liver surgery, liver transplantation and percutaneous ablation, but it was also agreed that they are less beneficial or not necessary for endoscopy without intervention and paracentesis. CONCLUSIONS Using a modified Delphi method, experts reached an agreement for TCP management in CLD patients undergoing ten invasive procedures. These practice guidelines may help with decision making and patient management in areas where clinical evidence is absent or limited.
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Affiliation(s)
- Robert Flisiak
- Department of Infectious Diseases and Hepatology, Medical University of Białystok, Zurawia 14, 15-540 Białystok, Poland
- Correspondence: ; Tel.: +48-605-203-525; Fax: +48-85-7416-921
| | - Krasimir Antonov
- Department of Gastroenterology, University Hospital ‘St. Ivan Rilski’, 1431 Sofia, Bulgaria;
| | - Pavel Drastich
- Department of Hepatogastroenterology, Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic;
| | - Peter Jarcuska
- Second Department of Internal Medicine, Faculty of Medicine and L. Pasteur University Hospital, P.J. Safarik University, Trieda SNP 1, 040 11 Kosice, Slovakia;
| | - Marina Maevskaya
- Clinic of Propedeutics of Internal Diseases, Gastroenterology and Hepatology Named after V. Kh. Vasilenko, Federal State Autonomous Educational Institution of Higher Education I.M. Sechenov First Moscow State Medical University (Sechenov University) of the Ministry of Health of the Russian Federation, 119435 Moscow, Russia;
| | - Mihály Makara
- Central Hospital of Southern Pest National Institute of Haematology and Infectious Diseases, 1097 Budapest, Hungary;
| | - Željko Puljiz
- Department of Gastroenterology and Hepatology University Hospital Split, Split School of Medicine, 21000 Split, Croatia;
| | - Borut Štabuc
- Division of Internal Medicine, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia;
| | - Anca Trifan
- Department of Internal Diseases, Institute of Gastroenterology and Hepatology Lasi, University of Medicine and Pharmacy “Gr. T. Popa”, 700115 Lasi, Romania;
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27
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Agarwal N, Mangla A. Thrombopoietin receptor agonist for treatment of immune thrombocytopenia in pregnancy: a narrative review. Ther Adv Hematol 2021; 12:20406207211001139. [PMID: 33796239 PMCID: PMC7983475 DOI: 10.1177/20406207211001139] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 02/09/2021] [Indexed: 12/26/2022] Open
Abstract
The treatment of immune thrombocytopenia (ITP) in adults has evolved rapidly over the past decade. The second-generation thrombopoietin receptor agonists (TPO-RAs), romiplostim, eltrombopag, and avatrombopag are approved for the treatment of chronic ITP in adults. However, their use in pregnancy is labeled as category C by the United States Food and Drug Administration (FDA) due to the lack of clinical data on human subjects. ITP is a common cause of thrombocytopenia in the first and second trimester of pregnancy, which not only affects the mother but can also lead to thrombocytopenia in the neonatal thrombocytopenia secondary to maternal immune thrombocytopenia (NMITP). Corticosteroids, intravenous immunoglobulins (IVIGs) are commonly used for treating acute ITP in pregnant patients. Drugs such as rituximab, anti-D, and azathioprine that are used to treat ITP in adults, are labeled category C and seldom used in pregnant patients. Cytotoxic chemotherapy (vincristine, cyclophosphamide), danazol, and mycophenolate are contraindicated in pregnant women. In such a scenario, TPO-RAs present an attractive option to treat ITP in pregnant patients. Current evidence on the use of TPO-RAs in pregnant women with ITP is limited. In this narrative review, we will examine the preclinical and the clinical literature regarding the use of TPO-RAs in the management of ITP in pregnancy and their effect on neonates with NMITP.
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Affiliation(s)
- Nikki Agarwal
- Division of Pediatric Hematology and Oncology, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - Ankit Mangla
- Division of Hematology and Oncology, Seidman Cancer Center, University Hospitals, 11100 Euclid Avenue, Cleveland, OH 44106, USA
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28
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Lozano ML, Godeau B, Grainger J, Matzdorff A, Rodeghiero F, Hippenmeyer J, Kuter DJ. Romiplostim in adults with newly diagnosed or persistent immune thrombocytopenia. Expert Rev Hematol 2020; 13:1319-1332. [PMID: 33249935 DOI: 10.1080/17474086.2020.1850253] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Introduction: Three distinct phases are recognized in immune thrombocytopenia (ITP): newly diagnosed (≤3 months after diagnosis), persistent (>3-12 months after diagnosis), and chronic (>12 months). Several international guidelines/expert recommendations have been released in the past 2 years regarding the treatment of newly diagnosed/persistent ITP. Areas covered: Across the guidelines/expert recommendations, thrombopoietin receptor agonists (TPO-RAs), including romiplostim (the focus of this review), are recommended in newly diagnosed or persistent ITP for patients who fail to respond to corticosteroids or intravenous immunoglobulin (or where these are contraindicated). To identify data relating to romiplostim in adults with newly diagnosed or persistent ITP, we conducted a search of PubMed (with no time limit applied) and abstracts from 2019 EHA/ASH meetings using the term 'romiplostim.' Expert opinion: The findings from nine clinical trials, six real-world studies and ten case reports provide insight into the early use of romiplostim, which could help to reduce exposure to the adverse effects associated with prolonged corticosteroid use, as well as reduce the risk of severe bleeding. Additionally, given the durable responses observed in patients with newly diagnosed/persistent ITP, as well as the potential for treatment-free responses following discontinuation, romiplostim might help to avoid the need for subsequent treatment.
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Affiliation(s)
- Maria L Lozano
- Hospital JM Morales Meseguer, Universidad de Murcia, IMIB-Arrixaca , Murcia, Spain.,Grupo de investigación CB15/00055 del Centro de Investigación Biomedica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III (ISCIII) , Madrid, Spain
| | - Bertrand Godeau
- Centre de Référence des Cytopénies Auto-Immunes de l'Adulte, Service de Médecine Interne, CHU Henri Mondor, AP-HP, Université Paris-Est Créteil , Créteil, France
| | - John Grainger
- Department of Haematology, Royal Manchester Children's Hospital , Manchester, UK
| | - Axel Matzdorff
- Department of Internal Medicine II, Asklepios Clinic Uckermark , Schwedt, Germany
| | - Francesco Rodeghiero
- Hematology Project Foundation and Department of Hematology, S. Bortolo Hospital , Vicenza, Italy
| | | | - David J Kuter
- Division of Hematology, Massachusetts General Hospital, Harvard Medical School , Boston, MA, USA
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29
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Abdela J. Current Advance in Thrombopoietin Receptor Agonists in the Management of Thrombocytopenia Associated With Chronic Liver Disease: Focus on Avatrombopag. Clin Med Insights Blood Disord 2019; 12:1179545X19875105. [PMID: 31673229 PMCID: PMC6804364 DOI: 10.1177/1179545x19875105] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 08/20/2019] [Indexed: 12/22/2022]
Abstract
Chronic liver disease (CLD) is a condition that progresses over time toward advanced disease state which is known as liver cirrhosis. Liver cirrhosis leads to dangerous health problems among people living across the world. One such problem that observed in about 75% of cirrhotic patients is thrombocytopenia; which in turn associated with poor prognosis and recovery from CLD. Beyond these, thrombocytopenia in cirrhotic patients led to impairment of coagulation cascade and significantly influenced the utilization of effective mechanism in the management of CLD. By nature, treatment of CLD involves invasive diagnostic and treatment procedures; therefore, in the presence of thrombocytopenia implementing these methods put the lives of patients in a critical health problem due to increased risk of bleeding and mortality. Because of these reasons, prophylactic transfusion of platelets is considered to be one of the most effective options that reduce the risk of bleeding in patients with CLD that required to undergo an invasive procedure. Although platelet transfusion presented with significant advantages in facilitating the invasive procedure in patients with CLD, refractoriness with repeated use and various problems associated with its transfusion limit the continuous utilization of this important option. With these challenges and current advance in the knowledge of thrombopoiesis, the development of relatively safe and alternative drugs that enhance the production of platelets by interacting with thrombopoietin receptor agonists provides a promising option to platelet transfusion. The discovery and approval of romiplostim and eltrombopag in August 2008 and November 2008, respectively, for the treatment of chronic immune thrombocytopenia paved a way and followed by the Food and Drug Administration (FDA) approval of 2 potentially advantageous drugs, lusutrombopag, and avatrombopag, in 2018 for the treatment of thrombocytopenia in patients with CLD that required to undergo elective surgery. Therefore, this review aims to assess pathogenesis of thrombocytopenia and its challenges in the management of liver-related issues and, more importantly, gives emphasis to address the potential use of avatrombopag in the treatment of thrombocytopenia underlying CLD, its pharmacokinetics and pharmacodynamics, as well as its toxicological profiles by presenting the most commonly reported adverse events in various trials.
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Affiliation(s)
- Jemal Abdela
- Department of Pharmacology and Toxicology, School of Pharmacy, College of Health and Medical Sciences, Haramaya University, Harar, Ethiopia
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Cheloff AZ, Al-Samkari H. Avatrombopag for the treatment of immune thrombocytopenia and thrombocytopenia of chronic liver disease. J Blood Med 2019; 10:313-321. [PMID: 31565009 PMCID: PMC6733339 DOI: 10.2147/jbm.s191790] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Accepted: 08/01/2019] [Indexed: 12/17/2022] Open
Abstract
Avatrombopag is an orally-administered small molecule thrombopoietin receptor agonist. It was the third thrombopoietin receptor agonist approved for the treatment of immune thrombocytopenia and the first approved to treat periprocedural thrombocytopenia in patients with chronic liver disease (thereby providing an alternative to blood transfusions for these patients). Unlike eltrombopag, avatrombopag does not require a 4 hr food-restricted window around its use and it has not been associated with hepatotoxicity in ITP patients or portal vein thrombosis in patients with chronic liver disease. In ITP patients it can often be dosed less frequently than once daily. It is overall well-tolerated with a side-effect profile similar to placebo in randomized clinical trials. This article will review the clinical development, efficacy, safety, and pharmacology of avatrombopag for use in patients with ITP and thrombocytopenia of chronic liver disease.
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Affiliation(s)
- Abraham Z Cheloff
- Division of Hematology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Hanny Al-Samkari
- Division of Hematology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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31
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Abstract
Introduction: Thrombocytopenia is a common hematological abnormality in patients with chronic liver disease (CLD), occurring in 64%~84% of patients with cirrhosis or fibrosis. Due to the increased risk of bleeding, thrombocytopenia potentially affects management of CLD, such as surgery or liver biopsy. Avatrombopag is a new oral thrombopoietin (TPO) receptor agonist, activating TPO receptor and increasing megakaryocytic proliferation/differentiation and platelet production. Areas covered: This review summarizes the collected data concerning pharmacokinetics, clinical efficacy, safety and tolerability profiles of avatrombopag for the management of thrombocytopenia in patients with CLD. Expert opinion: Avatrombopag is recently approved by Food and Drug Administration (FDA) for the treatment of thrombocytopenia in patients with CLD who are scheduled to undergo a procedure. Based on the available clinical trials, avatrombopag is superior to placebo in reducing the need for platelet transfusions or rescue procedures for bleeding. Avatrombopag is also recommended as alternative to platelet transfusions.
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Affiliation(s)
- Hongming Xu
- Department of emergency, Yuyao People's Hospital , Yuyao , China
| | - Rong Cai
- Department of emergency, Yuyao People's Hospital , Yuyao , China
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32
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Li C, Li X, Huang F, Yang J, Wu A, Wang L, Qin D, Zou W, Wu J. Efficacy and Safety of Avatrombopag in Patients With Thrombocytopenia: A Systematic Review and Meta-Analysis of Randomized Controlled Trials. Front Pharmacol 2019; 10:829. [PMID: 31402863 PMCID: PMC6677019 DOI: 10.3389/fphar.2019.00829] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 06/27/2019] [Indexed: 01/04/2023] Open
Abstract
Background: Avatrombopag is a novel oral, nonpeptide thrombopoietin receptor agonist (TPO-RA). A few studies have shown that avatrombopag is effective against thrombocytopenia. However, no systematic review has been conducted on the efficacy and safety of avatrombopag. Therefore, the aim of this study was to comprehensively assess the efficacy and safety of avatrombopag patients with thrombocytopenia. Methods: Databases including Medline, PubMed, Embase, the Cochrane Library and ClinicalTrials.gov were searched for randomized controlled trials that compared avatrombopag with placebo in patients with thrombocytopenia. The deadline was March 2019. Results: In total, 743 patients were analyzed in five clinical trials. Patients treated with avatrombopag achieved higher platelet response (OR: 17.71, 95% CI [11.01 to 28.48], p < 0.00001) than with placebo. Avatrombopag produced an absolute increment in platelet count (WMD: 31.13%, 95% CI [22.27 to 39.99], p < 0.00001) unlike the placebo. In addition, the incidence of serious adverse events (RR: 1.18, 95% CI [0.72 to 1.93], p = 0.51) and deaths (RR: 0.93, 95% CI [0.19 to 4.45], p = 0.93) in patients treated with avatrombopag was not significantly different from that in patients treated with placebo. The incidence of adverse events in patients treated with avatrombopag was slightly higher than that in patients treated with placebo (RR: 1.25, 95% CI [1.05 to 1.49], p = 0. 01) after one trial with high heterogeneity was removed. Conclusions: This meta-analysis showed that avatrombopag was an effective treatment for thrombocytopenia, but there is sufficient evidence to indicate that adverse events may occur.
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Affiliation(s)
- Chunlu Li
- Department of Chinese Materia Medica, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China.,Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Xiaoxuan Li
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Department of Pharmacy, The Second People's Hospital of Yibin, Yibin, China
| | - Feihong Huang
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Institute of Cardiovascular Research, The Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Jing Yang
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Institute of Cardiovascular Research, The Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Anguo Wu
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Institute of Cardiovascular Research, The Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Long Wang
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Institute of Cardiovascular Research, The Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Dalian Qin
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Institute of Cardiovascular Research, The Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China
| | - Wenjun Zou
- Department of Chinese Materia Medica, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jianming Wu
- Laboratory of Chinese Materia Medica, Department of Pharmacology, School of Pharmacy, Southwest Medical University, Luzhou, China.,Institute of Cardiovascular Research, The Key Laboratory of Medical Electrophysiology, Ministry of Education of China, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Medical Key Laboratory for Drug Discovery and Druggability Evaluation of Sichuan Province, Luzhou Key Laboratory of Activity Screening and Druggability Evaluation for Chinese Materia Medica, Luzhou, China.,Department of Pharmacy, Affiliated Hospital of Southwest Medical University, Luzhou, China
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Abstract
Introduction: Immune thrombocytopenia (ITP) is an autoimmune disease. Even though there are many treatments available, some patients remain resistant to multiple treatments. Therefore, it is very important to develop new treatment options. Areas covered: Here, the authors summarize several current and emerging treatments developed for ITP in recent years. They include a summary of their mechanisms of action and clinical trial results. Expert opinion: At present, the first-line treatment of ITP is glucocorticoid and intravenous immunoglobulin (IVIg). Other traditional therapies include splenectomy, thrombopoietin (TPO), rituximab and other immunosuppressive agents. The several emerging treatments developed recently for ITP may change the treatment pattern in the future.
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Affiliation(s)
- Xueqing Dou
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China
| | - Renchi Yang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College , Tianjin , PR China
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Clemons Bankston P, Al-Horani RA. New Small Molecule Drugs for Thrombocytopenia: Chemical, Pharmacological, and Therapeutic Use Considerations. Int J Mol Sci 2019; 20:ijms20123013. [PMID: 31226783 PMCID: PMC6628068 DOI: 10.3390/ijms20123013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/16/2019] [Accepted: 06/18/2019] [Indexed: 12/18/2022] Open
Abstract
This review provides details about three small molecules that were recently approved by the FDA for the treatment of thrombocytopenia. The new treatments include lusutrombopag, avatrombopag, and fostamatinib. The first two drugs are orally active thrombopoietin receptor (TPO-R) agonists which are FDA-approved for the treatment of thrombocytopenia in adult patients with chronic liver disease who are scheduled to undergo a procedure. Fostamatinib is orally active prodrug that, after activation, becomes spleen tyrosine kinase (SYK) inhibitor. Fostamatinib is currently used to treat chronic and refractory immune thrombocytopenia in patients who have had insufficient response to previous treatment. Chemical structures, available dosage forms, recommended dosing, pharmacokinetics, results of toxicity studies in animals, most frequent adverse effects, significant outcomes of the corresponding clinical trials, and their use in specific patient populations are thoroughly described. Described also is a comparative summary of the different aspects of five currently available therapies targeting TPO-R or SYK for the treatment of thrombocytopenia.
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Affiliation(s)
- Page Clemons Bankston
- Division of Basic Pharmaceutical Sciences, College of Pharmacy, Xavier University of Louisiana, New Orleans, LA 70125, USA.
| | - Rami A Al-Horani
- Division of Basic Pharmaceutical Sciences, College of Pharmacy, Xavier University of Louisiana, New Orleans, LA 70125, USA.
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35
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Al-Samkari H, Kuter DJ. Optimal use of thrombopoietin receptor agonists in immune thrombocytopenia. Ther Adv Hematol 2019; 10:2040620719841735. [PMID: 31007886 PMCID: PMC6460888 DOI: 10.1177/2040620719841735] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 03/11/2019] [Indexed: 12/11/2022] Open
Abstract
The thrombopoietin receptor agonists (TPO-RAs) are a class of platelet growth factors commonly used to treat immune thrombocytopenia (ITP). There are three agents that have been investigated for the treatment of chronic ITP: the peptide agent romiplostim and the small molecule agents eltrombopag and avatrombopag. These agents offer a higher clinical response rate than most other ITP therapies but may require indefinite use. This review is a critical appraisal of the TPO-RAs in adult ITP, defining the optimal patient groups to receive these agents and assisting the hematologist with agent choice, goals of treatment, dosing strategies, and toxicity management. Use of endogenous thrombopoietin levels to predict response to eltrombopag and romiplostim treatment is discussed and alternative dosing protocols suited for certain patient subgroups are described. Finally, indications for discontinuation and combination therapy with other agents are considered.
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Affiliation(s)
- Hanny Al-Samkari
- Division of Hematology, Massachusetts General Hospital, Harvard Medical School, Suite 118, Room 112, Zero Emerson Place, Boston, MA 02114, USA
| | - David J. Kuter
- Division of Hematology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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36
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Kuter DJ, Allen LF. Avatrombopag, an oral thrombopoietin receptor agonist: results of two double-blind, dose-rising, placebo-controlled Phase 1 studies. Br J Haematol 2018; 183:466-478. [PMID: 30203841 PMCID: PMC6282597 DOI: 10.1111/bjh.15574] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 07/09/2018] [Indexed: 01/26/2023]
Abstract
Avatrombopag is an oral thrombopoietin receptor agonist that has been recently approved for treating thrombocytopenia in chronic liver disease patients needing invasive procedures. Clinical trials supporting this new treatment were guided by two double‐blind, dose‐rising, placebo‐controlled Phase 1 studies in healthy adults reported here that assessed safety, tolerability and pharmacokinetic profile of avatrombopag, and its effect on platelet counts. Subjects were randomised (2:1) in the single‐dose study (N = 63) to avatrombopag (1, 3, 10, 20, 50, 75 and 100 mg) or placebo, and in the multiple‐dose study (N = 29) to avatrombopag (3, 10 and 20 mg) or placebo daily for 14 days. There were no serious adverse events (AEs), dose‐limiting toxicities, deaths, AEs causing withdrawal, thromboses or liver function abnormalities. In both studies, avatrombopag peak concentration and exposure increased proportionally relative to dose; half‐life was 18–21 h and independent of dose, supporting once‐daily dosing. Effects on platelet counts depended on dose, concentration and treatment duration. Platelet count increases began 3–5 days post‐administration, with maximum changes of >370 × 109/l over baseline with 20 mg daily after 13–16 days. These data support continued development of avatrombopag for treatment of other thrombocytopenic conditions and provide important guidance for the haematologist in the use of this new thrombopoietin receptor agonist.
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Affiliation(s)
- David J Kuter
- Center for Hematology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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37
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Nomoto M, Ferry J, Hussein Z. Population Pharmacokinetic/Pharmacodynamic Analyses of Avatrombopag in Patients With Chronic Liver Disease and Optimal Dose Adjustment Guide With Concomitantly Administered CYP3A and CYP2C9 Inhibitors. J Clin Pharmacol 2018; 58:1629-1638. [PMID: 29905956 DOI: 10.1002/jcph.1267] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 05/10/2018] [Indexed: 12/12/2022]
Abstract
Avatrombopag, a c-Mpl agonist, has been developed to provide an alternative therapy to standard platelet transfusion care for the treatment of thrombocytopenia. The main objectives of this article were to describe the pharmacokinetics (PK) of avatrombopag, to characterize the pharmacokinetic/pharmacodynamic (PK/PD) relationship between plasma avatrombopag concentrations and platelet count, and to identify potential intrinsic and extrinsic factors affecting PK or PK/PD in patients with chronic liver disease (CLD). Platelet count following avatrombopag administration with and without concomitant medication was further simulated using the final population PK/PD model to explore potential dose adjustments. Avatrombopag PK was described by a 1-compartment model with combined first- and zero-order absorption and linear elimination. The relationship between the plasma avatrombopag concentrations and platelet count was well described by a 6-compartment life-span model with a linear drug effect. The final PK and PK/PD models included statistically significant but not clinically relevant effects of body weight and CLD on apparent volume distribution and East Asian ethnicity, albumin, and thrombopoietin level on the slope parameter in the PK/PD relationship. PK/PD simulations showed comparable elevation in platelet count with and without concomitant cytochrome P450 (CYP) 3A and CYP2C9 inhibitors for the dosing regimens of 40 and 60 mg for 5 days, with predictions of <10% of CLD patients exceeding platelet count >200 × 109 /L. Dose adjustment is therefore not necessary with concomitant use of CYP3A and CYP2C9 interacting drugs considering the limited treatment duration (ie, 5 days) and lack of significant safety concerns in CLD patients.
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Affiliation(s)
| | - Jim Ferry
- Eisai, Inc., Woodcliff Lake, NJ, USA
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38
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Nomoto M, Pastino G, Rege B, Aluri J, Ferry J, Han D. Pharmacokinetics, Pharmacodynamics, Pharmacogenomics, Safety, and Tolerability of Avatrombopag in Healthy Japanese and White Subjects. Clin Pharmacol Drug Dev 2017; 7:188-195. [PMID: 28339166 DOI: 10.1002/cpdd.349] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 02/16/2017] [Indexed: 01/13/2023]
Abstract
Avatrombopag, an orally administered, small-molecule thrombopoietin receptor (c-Mpl) agonist, is currently in clinical development for the potential treatment of severe thrombocytopenia in patients with chronic liver disease undergoing an elective procedure. The objectives of this study were to characterize and compare the pharmacokinetics (including the food effect) and pharmacodynamics (platelet count) of avatrombopag following single doses in Japanese and white subjects. Following single dosing under fasted and fed conditions, mean peak concentrations occurred at 5 to 8 hours and subsequently declined with a half-life of 16 to 18 hours in Japanese and white subjects. Administration with food did not alter the rate or extent of avatrombopag absorption but substantially reduced pharmacokinetic variability relative to the fasted state. CYP2C9 polymorphism (*2, *3) was associated with higher pharmacokinetic variability but not with any clinically important effect on variability in platelet response. Plasma exposures of avatrombopag increased in a dose-proportional manner over the dose range tested. After a single dose, platelet count increased in a dose-related manner, reaching a maximum by day 11 and returning to baseline levels by day 27. No clinically important differences were found when avatrombopag pharmacokinetics and pharmacodynamics were compared between Japanese and white subjects. Administration of avatrombopag was generally well tolerated.
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Affiliation(s)
| | | | | | | | | | - David Han
- California Clinical Trials Medical Group, Inc, Glendale, CA, USA
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