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Buckstein R, Chodirker L, Yee KWL, Geddes M, Leitch HA, Christou G, Banerji V, Leber B, Khalaf D, St-Hilaire E, Finn N, Nevill T, Keating MM, Storring J, Parmentier A, Thambipillai A, Tang D, Westcott C, Cameron C, Spin P. The burden of red blood cell transfusions in patients with lower-risk myelodysplastic syndromes and ring sideroblasts: an analysis of the prospective MDS-CAN registry. Leuk Lymphoma 2023; 64:651-661. [PMID: 36606533 DOI: 10.1080/10428194.2022.2156793] [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] [Indexed: 01/07/2023]
Abstract
Many patients with lower-risk myelodysplastic syndromes (LR MDS) require long-term red blood cell (RBC) transfusions to manage anemia. The consequences of RBC transfusions in LR MDS with ring sideroblasts (LR MDS-RS) are not well known. We estimated the association between cumulative RBC dose density and clinical and patient-reported outcomes using data from the MDS-CAN registry for patients enrolled between January 2008 and December 2018. Outcomes included overall survival, hospitalization, and health-related quality of life (HRQoL). A total of 145 enrolled patients with LR MDS and RS ≥5% had a median follow-up time of 27.1 months; 45 had no transfusions during follow-up, 51 had <1 transfusion per month, and 49 had ≥1 transfusion per month. The cumulative density of RBC transfusions was associated with significantly greater mortality, hospitalization, and inferior HRQoL, suggesting that exposure to RBC transfusion may constitute a significant treatment burden in patients with LR MDS-RS.
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Affiliation(s)
- Rena Buckstein
- Division of Medical Oncology and Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
- Department of Medicine, University of Toronto, Toronto, Canada
| | - Lisa Chodirker
- Division of Medical Oncology and Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
- Department of Medicine, University of Toronto, Toronto, Canada
| | - Karen W L Yee
- Department of Medicine, University of Toronto, Toronto, Canada
- Cancer Clinical Research Unit, Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Michelle Geddes
- Department of Medicine, Tom Baker Cancer Centre, Calgary, Canada
| | - Heather A Leitch
- Division of Hematology, St. Paul's Hospital, University of British Columbia, Vancouver, Canada
| | - Grace Christou
- Clinical epidemiology, Ottawa Hospital Research Institute, University of Ottawa, Ottawa, Canada
| | | | - Brian Leber
- Hematology Disease Site Team, Juravinski Cancer Centre, Hamilton Health Sciences, Hamilton, Canada
| | - Dina Khalaf
- Hematology Disease Site Team, Juravinski Cancer Centre, Hamilton Health Sciences, Hamilton, Canada
| | - Eve St-Hilaire
- Hematology Services, Centre Hospitalier Universitaire Dr. Georges-L.-Dumont, Moncton, Canada
| | - Nicholas Finn
- Hematology Services, Centre Hospitalier Universitaire Dr. Georges-L.-Dumont, Moncton, Canada
| | - Thomas Nevill
- Division of Hematology, Leukemia/Bone Marrow Transplant Program of BC, BC Cancer, University of British Columbia, Vancouver, Canada
| | | | - John Storring
- Hematology Division, McGill University Health Centre, Montréal, Canada
| | - Anne Parmentier
- Division of Medical Oncology and Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Aksharh Thambipillai
- Division of Medical Oncology and Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, Canada
| | - Derek Tang
- Bristol Myers Squibb, Princeton, NJ, USA
| | | | - Chris Cameron
- Value and Evidence Division, Marketing and Market Access, EVERSANA™, Sydney, Canada
| | - Paul Spin
- Value and Evidence Division, Marketing and Market Access, EVERSANA™, Sydney, Canada
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Buckstein R, Chodirker L, Mozessohn L, Yee KWL, Geddes M, Zhu N, Shamy A, Leitch HA, Christou G, Banerji V, Brian L, Khalaf D, St-Hilaire E, Finn N, Nevill T, Keating MM, Storring J, Delage R, Parmentier A, Thambipillai A, Siddiqui M, Westcott C, Cameron C, Mamedov A, Spin P, Tang D. A natural history of lower-risk myelodysplastic syndromes with ring sideroblasts: an analysis of the MDS-CAN registry. Leuk Lymphoma 2022; 63:3165-3174. [PMID: 36095125 DOI: 10.1080/10428194.2022.2109154] [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] [Indexed: 01/12/2023]
Abstract
Patients with lower-risk (LR) myelodysplastic syndromes (MDS) with ring sideroblasts (RS) have better prognosis than those without RS, but how they fare over time is not fully understood. This study's objective was to assess the natural history of LR MDS with RS ≥5% using MDS-CAN registry individual data. Kaplan-Meier estimates and generalized linear mixed models were used to describe time-to-event outcomes and continuous outcomes, respectively. One hundred and thirty-eight patients were enrolled; median times from diagnosis to enrollment and follow-up were 6.6 and 39.6 months, respectively. Within 5 years of enrollment, 65% of patients had ≥1 red blood cell transfusion dependence episode. Within 5 years of diagnosis, 59% developed iron overload, 38% received iron chelation therapy, 14% progressed to acute myeloid leukemia, and 42% died. Patients exhibited inferior health-related quality of life trends. These first real-world data in LR MDS-RS in Canada indicate a high level of morbidity and mortality over a 5-year period. Clinical Trial Registration: ClinicalTrials.gov Identifier: NCT02537990.
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Affiliation(s)
- Rena Buckstein
- Division of Medical Oncology & Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.,Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Lisa Chodirker
- Division of Medical Oncology & Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.,Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Lee Mozessohn
- Division of Medical Oncology & Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada.,Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - Karen W L Yee
- Department of Medicine, University of Toronto, Toronto, ON, Canada.,Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | | | - Nancy Zhu
- Division of Hematology, University of Alberta, Edmonton, AB, Canada
| | - April Shamy
- Jewish General Hospital, Montréal, QC, Canada
| | - Heather A Leitch
- St. Paul's Hospital, University of British Columbia, Vancouver, BC, Canada
| | - Grace Christou
- Ottawa Hospital Research Institute, University of Ottawa, Ottawa, ON, Canada
| | | | - Leber Brian
- Juravinski Cancer Centre, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Dina Khalaf
- Juravinski Cancer Centre, Hamilton Health Sciences, Hamilton, ON, Canada
| | - Eve St-Hilaire
- Centre Hospitalier Universitaire Dr. Georges-L.-Dumont, Moncton, NB, Canada
| | - Nicholas Finn
- Centre Hospitalier Universitaire Dr. Georges-L.-Dumont, Moncton, NB, Canada
| | - Thomas Nevill
- Division of Hematology, Leukemia/Bone Marrow Transplant Program of BC, BC Cancer, University of British Columbia, Vancouver, BC, Canada
| | | | - John Storring
- McGill University Health Centre, Montréal, QC, Canada
| | - Robert Delage
- CHU de Québec, Hôpital de l'Enfant-Jésus, Centre Universitaire d'Hématologie et d'Oncologie de Québec, Québec, QC, Canada
| | - Anne Parmentier
- Division of Medical Oncology & Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Aksharh Thambipillai
- Division of Medical Oncology & Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Mohammed Siddiqui
- Division of Medical Oncology & Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | | | - Chris Cameron
- Value and Evidence Division, Marketing & Market Access, EVERSANA™, Sydney, NS, Canada
| | - Alexandre Mamedov
- Division of Medical Oncology & Hematology, Odette Cancer Centre, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Paul Spin
- Value and Evidence Division, Marketing & Market Access, EVERSANA™, Sydney, NS, Canada
| | - Derek Tang
- Bristol Myers Squibb, Princeton, NJ, USA
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Osborne MJ, Volpon L, Memarpooryazdi M, Pillay S, Thambipillai A, Czarnota S, Culjkovic-Kraljacic B, Trahan C, Oeffinger M, Cowling VH, L B Borden K. Identification and characterization of the interaction between the methyl-7-guanosine cap maturation enzyme RNMT and the cap-binding protein eIF4E. J Mol Biol 2022; 434:167451. [PMID: 35026230 DOI: 10.1016/j.jmb.2022.167451] [Citation(s) in RCA: 6] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 01/04/2022] [Accepted: 01/05/2022] [Indexed: 12/20/2022]
Abstract
The control of RNA metabolism is an important aspect of molecular biology with wide-ranging impacts on cells. Central to processing of coding RNAs is the addition of the methyl-7 guanosine (m7G) "cap" on their 5' end. The eukaryotic translation initiation factor eIF4E directly binds the m7G cap and through this interaction plays key roles in many steps of RNA metabolism including nuclear RNA export and translation. eIF4E also stimulates capping of many transcripts through its ability to drive the production of the enzyme RNMT which methylates the G-cap to form the mature m7G cap. Here, we found that eIF4E also physically associated with RNMT in human cells. Moreover, eIF4E directly interacted with RNMT in vitro. eIF4E is only the second protein reported to directly bind the methyltransferase domain of RNMT, the first being its co-factor RAM. We combined high-resolution NMR methods with biochemical studies to define the binding interfaces for the RNMT-eIF4E complex. Further, we found that eIF4E competes for RAM binding to RNMT and conversely, RNMT competes for binding of well-established eIF4E-binding partners such as the 4E-BPs. RNMT uses novel structural means to engage eIF4E. Finally, we observed that m7G cap-eIF4E-RNMT trimeric complexes form, and thus RNMT-eIF4E complexes may be employed so that eIF4E captures newly capped RNA. In all, we show for the first time that the cap-binding protein eIF4E directly binds to the cap-maturation enzyme RNMT.
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Affiliation(s)
- Michael J Osborne
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada
| | - Laurent Volpon
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada
| | - Mina Memarpooryazdi
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada
| | - Subhadra Pillay
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada; Department of Biological Chemistry, Michigan Medicine, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Aksharh Thambipillai
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada
| | - Sylwia Czarnota
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada
| | - Biljana Culjkovic-Kraljacic
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada
| | - Christian Trahan
- Department for Systems Biology, Institut de Recherches Cliniques de Montréal, Montréal, QC H2W 1R7, Canada; Département de Biochimie et Médecine Moléculaire, Université de Montréal, Montréal, QC H3T 1J4, Canada
| | - Marlene Oeffinger
- Department for Systems Biology, Institut de Recherches Cliniques de Montréal, Montréal, QC H2W 1R7, Canada; Département de Biochimie et Médecine Moléculaire, Université de Montréal, Montréal, QC H3T 1J4, Canada; Division of Experimental Medicine, McGill University, Montréal, QC, Canada
| | - Victoria H Cowling
- Centre for Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee, UK, DD1 5EH
| | - Katherine L B Borden
- Institute of Research in Immunology and Cancer, Department of Pathology and Cell Biology, Université de Montréal, Pavilion Marcelle-Coutu, Chemin Polytechnique, Montréal, QC H3T 1J4, Canada.
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