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Van Der Schueren C, Decruyenaere P, Avila Cobos F, Bult J, Deleu J, Dipalo LL, Helsmoortel HH, Hulstaert E, Morlion A, Ramos Varas E, Schoofs K, Trypsteen W, Vanden Eynde E, Van Droogenbroeck H, Verniers K, Vandesompele J, Decock A. Subpar reporting of pre-analytical variables in RNA-focused blood plasma studies. Mol Oncol 2024. [PMID: 38564603 DOI: 10.1002/1878-0261.13647] [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: 11/27/2023] [Revised: 02/13/2024] [Accepted: 03/22/2024] [Indexed: 04/04/2024] Open
Abstract
Extracellular RNA (cell-free RNA; exRNA) from blood-derived liquid biopsies is an appealing, minimally invasive source of disease biomarkers. As pre-analytical variables strongly influence exRNA measurements, their reporting is essential for meaningful interpretation and replication of results. The aim of this review was to chart to what extent pre-analytical variables are documented, to pinpoint shortcomings and to improve future reporting. In total, 200 blood plasma exRNA studies published in 2018 or 2023 were reviewed for annotation of 22 variables associated with blood collection, plasma preparation, and RNA purification. Our results show that pre-analytical variables are poorly documented, with only three out of 22 variables described in over half of the publications. The percentage of variables reported ranged from 4.6% to 54.6% (mean 24.84%) in 2023 and from 4.6% to 57.1% (mean 28.60%) in 2018. Recommendations and guidelines (i.e., BRISQ, ASCO-CAP, BloodPAC, PPMPT, and CEN standards) have currently not resulted in improved reporting. In conclusion, our results highlight the lack of reporting pre-analytical variables in exRNA studies and advocate for a consistent use of available standards, endorsed by funders and journals.
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Affiliation(s)
| | - Philippe Decruyenaere
- Department of Biomolecular Medicine, Ghent University, Belgium
- Department of Hematology, Ghent University Hospital, Belgium
| | - Francisco Avila Cobos
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Johanna Bult
- Department of Biomolecular Medicine, Ghent University, Belgium
- Department of Hematology, University Medical Center Groningen, The Netherlands
| | - Jill Deleu
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Laudonia Lidia Dipalo
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Hetty Hilde Helsmoortel
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Eva Hulstaert
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
- Department of Dermatology, AZ Sint-Blasius, Belgium
| | - Annelien Morlion
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Elena Ramos Varas
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Kathleen Schoofs
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
- Translational Oncogenomics and Bioinformatics Lab, Cancer Research Institute Ghent (CRIG), Belgium
- Center for Medical Biotechnology, VIB-UGent, Belgium
| | - Wim Trypsteen
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Eveline Vanden Eynde
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Hanne Van Droogenbroeck
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Kimberly Verniers
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
| | - Jo Vandesompele
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
- CellCarta, Belgium
| | - Anneleen Decock
- Department of Biomolecular Medicine, Ghent University, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Belgium
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Decruyenaere P, Giuili E, Verniers K, Anckaert J, De Grove K, Van der Linden M, Deeren D, Van Dorpe J, Offner F, Vandesompele J. Exploring the cell-free total RNA transcriptome in diffuse large B-cell lymphoma and primary mediastinal B-cell lymphoma patients as biomarker source in blood plasma liquid biopsies. Front Oncol 2023; 13:1221471. [PMID: 37954086 PMCID: PMC10634215 DOI: 10.3389/fonc.2023.1221471] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Accepted: 09/18/2023] [Indexed: 11/14/2023] Open
Abstract
Introduction Diffuse large B-cell lymphoma (DLBCL) and primary mediastinal B-cell lymphoma (PMBCL) are aggressive histological subtypes of non-Hodgkin's lymphoma. Improved understanding of the underlying molecular pathogenesis has led to new classification and risk stratification tools, including the development of cell-free biomarkers through liquid biopsies. The goal of this study was to investigate cell-free RNA (cfRNA) biomarkers in DLBCL and PMBCL patients. Materials and methods Blood plasma samples (n=168) and matched diagnostic formalin-fixed paraffin-embedded (FFPE) tissue samples (n=69) of DLBCL patients, PMBCL patients and healthy controls were collected between 2016-2021. Plasma samples were collected at diagnosis, at interim evaluation, after treatment, and in case of refractory or relapsed disease. RNA was extracted from 200 µl plasma using the miRNeasy serum/plasma kit and from FFPE tissue using the miRNeasy FFPE kit. RNA was subsequently sequenced on a NovaSeq 6000 instrument using the SMARTer Stranded Total RNA-seq pico v3 library preparation kit. Results Higher cfRNA concentrations were demonstrated in lymphoma patients compared to healthy controls. A large number of differentially abundant genes were identified between the cell-free transcriptomes of DLBCL patients, PMBCL patients, and healthy controls. Overlap analyses with matched FFPE samples showed that blood plasma has a unique transcriptomic profile that significantly differs from that of the tumor tissue. As a good concordance between tissue-derived gene expression and the immunohistochemistry Hans algorithm for cell-of-origin (COO) classification was demonstrated in the FFPE samples, but not in the plasma samples, a 64-gene cfRNA classifier was developed that can accurately determine COO in plasma. High plasma levels of a 9-gene signature (BECN1, PRKCB, COPA, TSC22D3, MAP2K3, UQCRHL, PTMAP4, EHD1, NAP1L1 pseudogene) and a 5-gene signature (FTH1P7, PTMAP4, ATF4, FTH1P8, ARMC7) were significantly associated with inferior progression-free and overall survival in DLBCL patients, respectively, independent of the NCCN-IPI score. Conclusion Total RNA sequencing of blood plasma samples allows the analysis of the cell-free transcriptome in DLBCL and PMBCL patients and demonstrates its unexplored potential in identifying diagnostic, cell-of-origin, and prognostic cfRNA biomarkers.
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Affiliation(s)
- Philippe Decruyenaere
- Department of Hematology, Ghent University Hospital, Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Edoardo Giuili
- Interuniversity Institute of Bioinformatics in Brussels (IB), Free University of Brussels, Brussels, Belgium
- Department of Biotechnology and Pharmacy, University of Bologna, Bologna, Italy
| | - Kimberly Verniers
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Jasper Anckaert
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Katrien De Grove
- Department of Hematology, Ghent University Hospital, Ghent, Belgium
| | | | - Dries Deeren
- Department of Hematology, Algemeen Ziekenhuis (AZ) Delta Roeselare-Menen, Roeselare, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | - Fritz Offner
- Department of Hematology, Ghent University Hospital, Ghent, Belgium
| | - Jo Vandesompele
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent University, Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
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Decruyenaere P, Mazure D, Moors I, Van Dorpe J, Van der Linden M, Denys B, Hofmans M, Offner F. Systemic mastocytosis with myeloid sarcoma and B-CLL: molecular and clonal heterogeneity in a rare case of SM-AHN with review of literature. Acta Clin Belg 2023; 78:58-66. [PMID: 35098906 DOI: 10.1080/17843286.2022.2033919] [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: 01/18/2023]
Abstract
BACKGROUND Systemic mastocytosis (SM) is a rare myeloproliferative disease that results from a clonal proliferation of abnormal mast cells in one or more extra-cutaneous organs. Systemic mastocytosis with an associated hematological neoplasm (SM-AHN) is the second most common subgroup and is diagnosed when WHO criteria for both SM and a hematological neoplasm of non-mast cell lineage are met. The SM-AHN category as currently proposed is highly heterogeneous in terms of pathogenesis, clinical presentation, and prognosis. CASE PRESENTATION We present the first reported case of SM-AHN associated with two hematological malignancies of different lineages, a monocytic myeloid sarcoma and a B-cell chronic lymphatic leukemia. Cytogenetic and molecular analyses revealed a distinct clonal origin of the two associated malignancies. The SM-myeloid sarcoma clone demonstrated an abnormal karyotype, trisomy 8 and del(13)(q12.3q14.3), as well as mutations in KITD816V, DNMT3A and RUNX1. The DNMT3A mutation could be detected years before disease onset, supporting its potential role as early driver of leukemogenesis. No genetic aberrations could be identified in the CLL clone, which is assumed to present coincidentally. CONCLUSIONS This report highlights the importance of full diagnostic work-up in SM patients in whom an associated hematological malignancy is suspected. Moreover, the importance of genetic analysis is highlighted, as it provides additional insights in the underlying clonal pathogenesis of different phenotypes, can aid in risk stratification, and may help identify potential therapy targets.
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Affiliation(s)
- Philippe Decruyenaere
- Department of Hematology, Ghent University Hospital, Ghent, Belgium.,OncoRNALab, Cancer Research Institute Ghent (Crig), Ghent University, Ghent, Belgium.,Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Dominiek Mazure
- Department of Hematology, Ghent University Hospital, Ghent, Belgium
| | - Ine Moors
- Department of Hematology, Ghent University Hospital, Ghent, Belgium
| | - Jo Van Dorpe
- Department of Pathology, Ghent University Hospital, Ghent, Belgium
| | | | - Barbara Denys
- Department of Diagnostic Sciences, Ghent University Hospital, Ghent, Belgium
| | - Mattias Hofmans
- Department of Diagnostic Sciences, Ghent University Hospital, Ghent, Belgium
| | - Fritz Offner
- Department of Hematology, Ghent University Hospital, Ghent, Belgium
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Decruyenaere P, Verniers K, Poma-Soto F, Van Dorpe J, Offner F, Vandesompele J. RNA Extraction Method Impacts Quality Metrics and Sequencing Results in Formalin-Fixed, Paraffin-Embedded Tissue Samples. J Transl Med 2023; 103:100027. [PMID: 37039153 DOI: 10.1016/j.labinv.2022.100027] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/19/2022] [Accepted: 11/03/2022] [Indexed: 01/11/2023] Open
Abstract
Archived formalin-fixed, paraffin-embedded (FFPE) tissue samples are being increasingly used in molecular cancer research. Compared with fresh-frozen tissue, the nucleic acid analysis of FFPE tissue is technically more challenging. This study aimed to compare the impact of 3 different RNA extraction methods on yield, quality, and sequencing-based gene expression results in FFPE samples. RNA extraction was performed in 16 FFPE tumor specimens from patients with diffuse large B-cell lymphoma and in reference FFPE material from microsatellite-stable and microsatellite-instable cell lines (3 replicates each) using 2 silica-based procedures (A, miRNeasy FFPE; C, iCatcher FFPE Tissue RNA) and 1 isotachophoresis-based procedure (B, Ionic FFPE to Pure RNA). The RNA yield; RNA integrity, as reflected by the distribution value 200; and RNA purity, as reflected by the 260/280 and the 260/230 nm absorbance ratios, were determined. The RNA was sequenced on the NovaSeq 6000 instrument using the TruSeq RNA Exome and SMARTer Stranded Total RNA-Seq Pico v3 library preparations kits. Our results highlight the impact of RNA extraction methodology on both preanalytical and sequencing-based gene expression results. Overall, methods B and C outperformed method A because these showed significantly higher fractions of uniquely mapped reads, an increased number of detectable genes, a lower fraction of duplicated reads, and better representation of the B-cell receptor repertoire. Differences among the extraction methods were generally more explicit for the total RNA sequencing method than for the exome-capture sequencing method. Importantly, the predicative value of quality metrics varies among extraction kits, and caution should be applied when comparing and interpreting results obtained using different methods.
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Bogaert S, Suchonos N, Mohan PV, Decruyenaere A, Decruyenaere P, De Waele J, Vermassen F, Van Laecke S, Peeters P, Westhoff TH, Hoste EAJ. Predictive value of the renal resistive index in the immediate postoperative period after kidney transplantation on short- and long-term graft and patient outcomes. J Crit Care 2022; 71:154112. [PMID: 35843045 DOI: 10.1016/j.jcrc.2022.154112] [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: 03/07/2022] [Revised: 06/05/2022] [Accepted: 07/01/2022] [Indexed: 11/25/2022]
Abstract
INTRODUCTION During the postoperative stay in the intensive care unit after kidney transplantation, the renal resistive index (RI) is routinely measured. An increased RI, measured months posttransplant, is associated with a higher mortality. We wanted to investigate the value of the RI immediately posttransplant in predicting both short- and long-term outcome. METHODS We performed a retrospective single-center study. The RI was collected <48 h posttransplant in patients undergoing kidney transplantations between 2005 and 2014. Short-term outcome was evaluated by delayed graft function (DGF). The long-term endpoints were kidney function and mortality at 30 days, 1 year and 5 years. RESULTS We included 478 recipients, 91.4% of whom reached the end of the 5-year follow-up. A higher RI < 48 h posttransplant was significantly associated with DGF. This association was particularly strong in patients receiving grafts from donors after brain death and expanded criteria donors. A higher RI also correlated with mortality and death with functioning graft but not with graft failure. After adjustment for confounders, we found an association between increased RI and DGF, but not with long-term kidney function or mortality. CONCLUSION The RI routinely measured <48 h posttransplant is an independent predictor of short-term kidney function.
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Affiliation(s)
- Stijn Bogaert
- Faculty of Medicine, Ruhr-University Bochum, Bochum, Germany; Intensive Care Unit, Ghent University Hospital, Ghent University, Ghent, Belgium.
| | - Nicole Suchonos
- Faculty of Medicine, Ruhr-University Bochum, Bochum, Germany
| | | | | | | | - Jan De Waele
- Intensive Care Unit, Ghent University Hospital, Ghent University, Ghent, Belgium
| | - Frank Vermassen
- Department of Vascular Surgery, Ghent University Hospital, Ghent, Belgium
| | | | | | - Timm H Westhoff
- Faculty of Medicine, Ruhr-University Bochum, Bochum, Germany
| | - Eric A J Hoste
- Intensive Care Unit, Ghent University Hospital, Ghent University, Ghent, Belgium; Transplantation Center, Ghent University Hospital, Ghent, Belgium; Research Foundation-Flanders (FWO), Brussels, Belgium
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Drandi D, Decruyenaere P, Ferrante M, Offner F, Vandesompele J, Ferrero S. Nucleic Acid Biomarkers in Waldenström Macroglobulinemia and IgM-MGUS: Current Insights and Clinical Relevance. Diagnostics (Basel) 2022; 12:diagnostics12040969. [PMID: 35454017 PMCID: PMC9028641 DOI: 10.3390/diagnostics12040969] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/07/2022] [Accepted: 04/09/2022] [Indexed: 12/13/2022] Open
Abstract
Waldenström Macroglobulinemia (WM) is an indolent lymphoplasmacytic lymphoma, characterized by the production of excess immunoglobulin M monoclonal protein. WM belongs to the spectrum of IgM gammopathies, ranging from asymptomatic IgM monoclonal gammopathy of undetermined significance (IgM-MGUS), through IgM-related disorders and asymptomatic WM to symptomatic WM. In recent years, its complex genomic and transcriptomic landscape has been extensively explored, hereby elucidating the biological mechanisms underlying disease onset, progression and therapy response. An increasing number of mutations, cytogenetic abnormalities, and molecular signatures have been described that have diagnostic, phenotype defining or prognostic implications. Moreover, cell-free nucleic acid biomarkers are increasingly being investigated, benefiting the patient in a minimally invasive way. This review aims to provide an extensive overview of molecular biomarkers in WM and IgM-MGUS, considering current shortcomings, as well as potential future applications in a precision medicine approach.
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Affiliation(s)
- Daniela Drandi
- Department of Molecular Biotechnology and Health Sciences, Hematology Division, University of Torino, 10126 Torino, Italy; (M.F.); (S.F.)
- Correspondence: (D.D.); (P.D.)
| | - Philippe Decruyenaere
- Department of Hematology, Ghent University Hospital, 9000 Ghent, Belgium;
- OncoRNALab, Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium;
- Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
- Correspondence: (D.D.); (P.D.)
| | - Martina Ferrante
- Department of Molecular Biotechnology and Health Sciences, Hematology Division, University of Torino, 10126 Torino, Italy; (M.F.); (S.F.)
| | - Fritz Offner
- Department of Hematology, Ghent University Hospital, 9000 Ghent, Belgium;
| | - Jo Vandesompele
- OncoRNALab, Cancer Research Institute Ghent (CRIG), 9000 Ghent, Belgium;
- Department of Biomolecular Medicine, Ghent University, 9000 Ghent, Belgium
| | - Simone Ferrero
- Department of Molecular Biotechnology and Health Sciences, Hematology Division, University of Torino, 10126 Torino, Italy; (M.F.); (S.F.)
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Decruyenaere P, Van de Maele B, Hulstaert E, Van Vlierberghe H, Decruyenaere J, Lapeere H. IgE-mediated gastroallergic anisakiasis with eosinophilic oesophagitis: a case report. Acta Clin Belg 2022; 77:396-399. [PMID: 32970535 DOI: 10.1080/17843286.2020.1822627] [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] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Anisakiasis is an emerging zoonosis caused by the fish parasitic nematode Anisakis infecting the gastrointestinal tract. CASE PRESENTATION We describe a case of a 58-year-old woman diagnosed with gastro-allergic anisakiasis, in which the patient developed an acute food-induced IgE-mediated hypersensitivity reaction as well as concurrent gastro-intestinal manifestations after consumption of raw fish. The patient presented with epigastric pain, anaphylaxis and acute dysphagia caused by eosinophilic oesophagitis. DISCUSSION Anisakis allergy should be considered as causative agent in patients presenting with acute urticarial rash, anaphylaxis and/or abdominal manifestations, especially when symptoms occur after consumption of seafood. Moreover, eosinophilic oesophagitis may be a rare but important complication of Anisakis infection. Endoscopic evaluation with esophageal biopsies should therefore be considered if suggestive symptoms are present. Patients with confirmed gastroallergic anisakiasis are advised to properly freeze or cook fish prior to consumption, although caution is advised, since heat-stable allergen proteins have been described. An adrenaline auto-injector should be prescribed.
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Affiliation(s)
| | | | - Eva Hulstaert
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
| | - Hans Van Vlierberghe
- Department of Gastroenterology and Hepatology, Ghent University Hospital, Ghent, Belgium
| | - Johan Decruyenaere
- Department of Intensive Care Medicine, Ghent University Hospital, Ghent, Belgium
| | - Hilde Lapeere
- Department of Dermatology, Ghent University Hospital, Ghent, Belgium
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Decruyenaere P, Offner F, Vandesompele J. Circulating RNA biomarkers in diffuse large B-cell lymphoma: a systematic review. Exp Hematol Oncol 2021; 10:13. [PMID: 33593440 PMCID: PMC7885416 DOI: 10.1186/s40164-021-00208-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 12/30/2020] [Accepted: 02/06/2021] [Indexed: 12/31/2022] Open
Abstract
Diffuse large B-cell lymphoma (DLBCL) is the most common histological subtype of non-Hodgkin's lymphomas (NHL). DLBCL is an aggressive malignancy that displays a great heterogeneity in terms of morphology, genetics and biological behavior. While a sustained complete remission is obtained in the majority of patients with standard immunochemotherapy, patients with refractory of relapsed disease after first-line treatment have a poor prognosis. This patient group represents an important unmet need in lymphoma treatment. In recent years, improved understanding of the underlying molecular pathogenesis had led to new classification and prognostication tools, including the development of cell-free biomarkers in liquid biopsies. Although the majority of studies have focused on the use of cell-free fragments of DNA (cfDNA), there has been an increased interest in circulating-free coding and non-coding RNA, including messenger RNA (mRNA), microRNA (miRNA), long non-coding RNA (lncRNA) and circular RNA (circRNA), as well as RNA encapsulated in extracellular vesicles or tumor-educated platelets (TEPs). We performed a systematic search in PubMed to identify articles that evaluated circulating RNA as diagnostic, subtype, treatment response or prognostic biomarkers in a human DLBCL population. A total of 35 articles met the inclusion criteria. The aim of this systematic review is to present the current understanding of circulating RNA molecules as biomarker in DLBCL and to discuss their future potential.
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Affiliation(s)
- Philippe Decruyenaere
- Department of Hematology, Ghent University Hospital, 9K12, Campus UZ Ghent, Corneel Heymanslaan 10, 9000 Ghent, Belgium
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
| | - Fritz Offner
- Department of Hematology, Ghent University Hospital, 9K12, Campus UZ Ghent, Corneel Heymanslaan 10, 9000 Ghent, Belgium
| | - Jo Vandesompele
- OncoRNALab, Cancer Research Institute Ghent (CRIG), Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Ghent, Belgium
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Bogaert S, Peeters P, Suchonos N, Decruyenaere A, Decruyenaere P, Vermassen F, Hoste EA. WITHDRAWN: Impact on Delayed Graft Function of the Renal Resistive Index in the Immediate Postoperative Period After Kidney Transplantation: A Cohort Analysis. Transplant Proc 2020:S0041-1345(19)31053-X. [PMID: 32703673 DOI: 10.1016/j.transproceed.2019.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Accepted: 09/04/2019] [Indexed: 11/19/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at https://www.elsevier.com/about/our-business/policies/article-withdrawal.
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Affiliation(s)
- Stijn Bogaert
- Intensive Care Unit, Ghent University Hospital, Ghent, Belgium; Ruhr University Bochum, St. Elisabeth-Hospital, Bochum, Germany
| | | | - Nicole Suchonos
- Ruhr University Bochum, St. Elisabeth-Hospital, Bochum, Germany
| | | | | | - Frank Vermassen
- Department of Vascular Surgery, Ghent University Hospital, Ghent, Belgium
| | - Eric Aj Hoste
- Intensive Care Unit, Ghent University Hospital, Ghent, Belgium; Research-Foundation (FWO), Brussels, Belgium
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Decruyenaere P, Decruyenaere A, Peeters P, Vermassen F. A Single-Center Comparison of 22 Competing Definitions of Delayed Graft Function After Kidney Transplantation. Ann Transplant 2016; 21:152-9. [PMID: 26976295 DOI: 10.12659/aot.896117] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND This study compared 22 different definitions of delayed graft function (DGF) following kidney transplantation. MATERIAL AND METHODS Our study included 497 kidney transplantations from deceased donors at our center between 2005 and 2011. Graft survival analysis including log-rank tests and Cox proportional hazards model was performed. Sensitivity and specificity were calculated in relation to graft failure. RESULTS Mean follow-up time was 5.1 years. All dialysis-based definitions were associated with graft failure and characterized by high specificity (88-97%), but low sensitivity (25-29%). Hazard ratios ranged from 2.87 to 13.73, with increased risk when dialysis was required earlier and more frequently. The urine output-based definition performed similarly, with an association with graft failure and high specificity (96%), but low sensitivity (21%). Serum creatinine-based definitions were more heterogeneous. Higher sensitivity (4-67%) was found in some of these definitions, but was often associated with lower specificity (47-96%), losing the association with graft failure. Definitions combining different criteria varied in sensitivity (17-62%) and specificity (60-96%). However, some were able to achieve higher sensitivity without compromising too much on specificity, while keeping the association with graft failure. CONCLUSIONS Our results indicate a potential advantage of combined definitions, because they are able to detect a larger group of recipients with increased risk of graft failure.
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Affiliation(s)
| | | | - Patrick Peeters
- Department of Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Frank Vermassen
- Department of Thoracic and Vascular Surgery, Ghent University Hospital, Ghent, Belgium
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Decruyenaere A, Decruyenaere P, Peeters P, Vermassen F, Dhaene T, Couckuyt I. Prediction of delayed graft function after kidney transplantation: comparison between logistic regression and machine learning methods. BMC Med Inform Decis Mak 2015; 15:83. [PMID: 26466993 PMCID: PMC4607098 DOI: 10.1186/s12911-015-0206-y] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 09/30/2015] [Indexed: 01/05/2023] Open
Abstract
Background Predictive models for delayed graft function (DGF) after kidney transplantation are usually developed using logistic regression. We want to evaluate the value of machine learning methods in the prediction of DGF. Methods 497 kidney transplantations from deceased donors at the Ghent University Hospital between 2005 and 2011 are included. A feature elimination procedure is applied to determine the optimal number of features, resulting in 20 selected parameters (24 parameters after conversion to indicator parameters) out of 55 retrospectively collected parameters. Subsequently, 9 distinct types of predictive models are fitted using the reduced data set: logistic regression (LR), linear discriminant analysis (LDA), quadratic discriminant analysis (QDA), support vector machines (SVMs; using linear, radial basis function and polynomial kernels), decision tree (DT), random forest (RF), and stochastic gradient boosting (SGB). Performance of the models is assessed by computing sensitivity, positive predictive values and area under the receiver operating characteristic curve (AUROC) after 10-fold stratified cross-validation. AUROCs of the models are pairwise compared using Wilcoxon signed-rank test. Results The observed incidence of DGF is 12.5 %. DT is not able to discriminate between recipients with and without DGF (AUROC of 52.5 %) and is inferior to the other methods. SGB, RF and polynomial SVM are mainly able to identify recipients without DGF (AUROC of 77.2, 73.9 and 79.8 %, respectively) and only outperform DT. LDA, QDA, radial SVM and LR also have the ability to identify recipients with DGF, resulting in higher discriminative capacity (AUROC of 82.2, 79.6, 83.3 and 81.7 %, respectively), which outperforms DT and RF. Linear SVM has the highest discriminative capacity (AUROC of 84.3 %), outperforming each method, except for radial SVM, polynomial SVM and LDA. However, it is the only method superior to LR. Conclusions The discriminative capacities of LDA, linear SVM, radial SVM and LR are the only ones above 80 %. None of the pairwise AUROC comparisons between these models is statistically significant, except linear SVM outperforming LR. Additionally, the sensitivity of linear SVM to identify recipients with DGF is amongst the three highest of all models. Due to both reasons, the authors believe that linear SVM is most appropriate to predict DGF.
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Affiliation(s)
| | | | - Patrick Peeters
- Department of Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Frank Vermassen
- Department of Thoracic and Vascular Surgery, Ghent University Hospital, Ghent, Belgium
| | - Tom Dhaene
- Department of Information Technology (INTEC), Ghent University - iMinds, Ghent, Belgium
| | - Ivo Couckuyt
- Department of Information Technology (INTEC), Ghent University - iMinds, Ghent, Belgium
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Decruyenaere A, Decruyenaere P, Peeters P, Vermassen F. Validation in a Single-Center Cohort of Existing Predictive Models for Delayed Graft Function After Kidney Transplantation. Ann Transplant 2015; 20:544-52. [PMID: 26387917 DOI: 10.12659/aot.894034] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Kidney transplantation is the preferred treatment for patients with end-stage renal disease. Delayed graft function (DGF) is a common complication and is associated with short- and long-term outcomes. Several predictive models for DGF have been developed. MATERIAL AND METHODS 497 kidney transplantations from deceased donors at our center between 2005-2011 are included. Firstly, the predictive accuracy of the existing models proposed by Irish et al. (M1), Jeldres et al. (M2), Chapal et al. (M3), and Zaza et al. (M4) was assessed. Secondly, the existing models were aggregated into a meta-model (MM) using stacked regressions. Finally, the association between 47 risk factors and DGF was studied in our -cohort-fitted model (CFM) using logistic regression. The accuracy of all models was assessed by area under the receiver operating characteristic curve (AUROC) and Hosmer-Lemeshow test. RESULTS M1, M2, M3, M4, MM, and CFM have AUROCs of 0.78, 0.65, 0.59, 0.67, 0.78, and 0.82, respectively. M1 (P=0.018), M2 (P<0.001), M3 (P<0.001), and M4 (P<0.001) overestimate the risk. MM (P=0.255) and CFM (P=0.836) are well calibrated. Donor subtype (P<0.001), recipient cardiac function (P<0.001), donor serum creatinine (P<0.001), donor age (P=0.006), duration of dialysis (P=0.02), recipient BMI (P=0.008), donor BMI (P=0.041), and recipient preoperative diastolic blood pressure (P=0.049) are associated with DGF in our CFM. CONCLUSIONS Four existing predictive models for DGF overestimate the risk in a cohort with a low incidence of DGF. We have identified 2 recipient parameters that are not included in previous models: cardiac function and preoperative diastolic blood pressure.
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Affiliation(s)
| | | | - Patrick Peeters
- Department of Nephrology, Ghent University Hospital, Ghent, Belgium
| | - Frank Vermassen
- Department of Thoracic and Vascular Surgery, Ghent University Hospital, Ghent, Belgium
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Decruyenaere P, Decruyenaere A, Vermassen F, Peeters P. FP879A SINGLE-CENTER COMPARISON OF 22 COMPETING DEFINITIONS FOR DELAYED GRAFT FUNCTION AFTER KIDNEY TRANSPLANTATION. Nephrol Dial Transplant 2015. [DOI: 10.1093/ndt/gfv185.68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Decruyenaere A, Decruyenaere P, Vermassen F, Peeters P. FP828VALIDATION IN A SINGLE-CENTER COHORT OF EXISTING PREDICTIVE MODELS FOR DELAYED GRAFT FUNCTION AFTER KIDNEY TRANSPLANTATION. Nephrol Dial Transplant 2015. [DOI: 10.1093/ndt/gfv185.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Decruyenaere A, Decruyenaere P, Vermassen F, Peeters P, Dhaene T, Couckuyt I. SP787PREDICTIVE MODELING OF DELAYED GRAFT FUNCTION AFTER KIDNEY TRANSPLANTATION USING MACHINE LEARNING METHODS. Nephrol Dial Transplant 2015. [DOI: 10.1093/ndt/gfv202.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Seaux L, Coucke L, Decruyenaere P, Padalko E. Confusing mumps serology during an outbreak. J Clin Virol 2014; 63:81-3. [PMID: 25449171 DOI: 10.1016/j.jcv.2014.09.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/16/2014] [Accepted: 09/21/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Liesbeth Seaux
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, De Pintelaan 185/2P8, B-9000 Ghent, Belgium
| | - Line Coucke
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, De Pintelaan 185/2P8, B-9000 Ghent, Belgium
| | - Philippe Decruyenaere
- Faculty of Medicine and Life Sciences, Ghent University, De Pintelaan 185/5K3, B-9000 Ghent, Belgium
| | - Elizaveta Padalko
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, De Pintelaan 185/2P8, B-9000 Ghent, Belgium; School of Life Sciences, Hasselt University, Agoralaan Building D, B-3590 Diepenbeek, Belgium.
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