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Giles HV, Drayson MT, Kishore B, Pawlyn C, Kaiser M, Cook G, de Tute R, Owen RG, Cairns D, Menzies T, Davies FE, Morgan GJ, Pratt G, Jackson GH. Progression free survival of myeloma patients who become IFE-negative correlates with the detection of residual monoclonal free light chain (FLC) by mass spectrometry. Blood Cancer J 2024; 14:50. [PMID: 38499538 PMCID: PMC10948753 DOI: 10.1038/s41408-024-00995-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 01/17/2024] [Accepted: 01/22/2024] [Indexed: 03/20/2024] Open
Abstract
Deeper responses are associated with improved survival in patients being treated for myeloma. However, the sensitivity of the current blood-based assays is limited. Historical studies suggested that normalisation of the serum free light chain (FLC) ratio in patients who were negative by immunofixation electrophoresis (IFE) was associated with improved outcomes. However, recently this has been called into question. Mass spectrometry (MS)-based FLC assessments may offer a superior methodology for the detection of monoclonal FLC due to greater sensitivity. To test this hypothesis, all available samples from patients who were IFE negative after treatment with carfilzomib and lenalidomide-based induction and autologous stem cell transplantation (ASCT) in the Myeloma XI trial underwent FLC-MS testing. FLC-MS response assessments from post-induction, day+100 post-ASCT and six months post-maintenance randomisation were compared to serum FLC assay results. Almost 40% of patients had discordant results and 28.7% of patients with a normal FLC ratio had residual monoclonal FLC detectable by FLC-MS. FLC-MS positivity was associated with reduced progression-free survival (PFS) but an abnormal FLC ratio was not. This study demonstrates that FLC-MS provides a superior methodology for the detection of residual monoclonal FLC with FLC-MS positivity identifying IFE-negative patients who are at higher risk of early progression.
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Affiliation(s)
- H V Giles
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
- University of Birmingham, Birmingham, UK.
| | | | - B Kishore
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - C Pawlyn
- The Institute of Cancer Research, London and The Royal Marsden Hospital, London, UK
| | - M Kaiser
- The Institute of Cancer Research, London and The Royal Marsden Hospital, London, UK
| | - G Cook
- Leeds Cancer Research UK Institute of Clinical Trials Research, University of Leeds, Leeds, UK
| | - R de Tute
- Haematological Malignancy Diagnostic Service, Leeds Teaching Hospitals Trust, Leeds, UK
| | - R G Owen
- Haematological Malignancy Diagnostic Service, Leeds Teaching Hospitals Trust, Leeds, UK
| | - D Cairns
- Leeds Cancer Research UK Institute of Clinical Trials Research, University of Leeds, Leeds, UK
| | - T Menzies
- Leeds Cancer Research UK Institute of Clinical Trials Research, University of Leeds, Leeds, UK
| | - F E Davies
- Myeloma Research Program, Perlmutter Cancer, NYU Langone Health, New York, USA
| | - G J Morgan
- Myeloma Research Program, Perlmutter Cancer, NYU Langone Health, New York, USA
| | - G Pratt
- University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
- University of Birmingham, Birmingham, UK
| | - G H Jackson
- Department of Haematology, University of Newcastle, Newcastle upon Tyne, UK
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Giles HV, Karunanithi K. Performance Characteristics and Limitations of the Available Assays for the Detection and Quantitation of Monoclonal Free Light Chains and New Emerging Methodologies. Antibodies (Basel) 2024; 13:19. [PMID: 38534209 DOI: 10.3390/antib13010019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 02/26/2024] [Accepted: 03/05/2024] [Indexed: 03/28/2024] Open
Abstract
Light chain measurements form an essential component of the testing strategy for the detection and monitoring of patients with suspected and/or proven plasma cell disorders. Urine-based electrophoretic assays remain at the centre of the international guidelines for response assessment but the supplementary role of serum-free light chain (FLC) assays in response assessment and the detection of disease progression due to their increased sensitivity has been increasingly recognised since their introduction in 2001. Serum FLC assays have also been shown to be prognostic across the spectrum of plasma cell disorders and are now incorporated into risk stratification scores for patients with monoclonal gammopathy of undetermined significance (MGUS), smouldering multiple myeloma, and light chain amyloidosis (AL amyloidosis), as well as being incorporated into the criteria for defining symptomatic multiple myeloma. There are now multiple different commercially available serum FLC assays available with differing performance characteristics, which are discussed in this review, along with the implications of these for patient monitoring. Finally, newer methodologies for the identification and characterisation of monoclonal FLC, including modifications to electrophoretic techniques, mass spectrometry-based assays and Amylite, are also described along with the relevant published data available regarding the performance of each assay.
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Affiliation(s)
- Hannah V Giles
- Department of Clinical Haematology, University Hospitals Birmingham NHS Foundation Trust, Birmingham B15 2SY, UK
- Instute of Immunology and Immunotherapy, University of Birmingham, Birmingham B15 2TT, UK
| | - Kamaraj Karunanithi
- Department of Clinical Haematology, University Hospitals North Midlands NHS Trust, Royal Stoke Hospital, Newcastle Road, Stoke-on-Trent ST4 6QG, UK
- School of Medicine, Keele University, Keele, Newcastle-under-Lyme ST5 5BG, UK
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Singh G, Arinze N, Manthei DM, Plapp FV, Bollag RJ. Urine Protein Immunofixation Electrophoresis: Free Light Chain Urine Immunofixation Electrophoresis Is More Sensitive than Conventional Assays for Detecting Monoclonal Light Chains and Could Serve as a Marker of Minimal Residual Disease. Lab Med 2023; 54:527-533. [PMID: 36857478 DOI: 10.1093/labmed/lmac155] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
Abstract
BACKGROUND Immunoglobulin monoclonal light chains (MLCs) in serum and urine are markers for monoclonal gammopathy and could serve as markers of minimal residual disease (MRD) in multiple myeloma (MM). Excretion of MLCs in urine is known to result in renal damage and shorter survival in patients with LC-predominant MM. METHODS Retrospective review of urine immunofixation in 1738 specimens at 3 medical centers was conducted to assess the utility of urinalysis for diagnosis and monitoring of monoclonal gammopathy. We tested 228 stored urine specimens via the modified urine immunofixation method, using antisera to assay free LCs (FLCs). RESULTS Our review of urine immunofixation results and medical records validated the theory that the only meaningful value-added finding was detection of monoclonal free light chains. Examination of 228 urine specimens using our novel method revealed 18.4% additional positive results. The rate of incremental findings for lambda LCs was nearly 3-fold higher than for kappa LCs. CONCLUSIONS The new method of urine immunofixation is significantly more sensitive and more efficient than the conventional method for detecting MLCs in urine. The new assay appears to be sensitive enough to prove that MLCs serve as a marker of MRD in MM.
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Affiliation(s)
- Gurmukh Singh
- Department of Pathology Medical College of Georgia at Augusta University, Augusta, GA
| | - Nkechi Arinze
- Department of Pathology Medical College of Georgia at Augusta University, Augusta, GA
| | | | | | - Roni J Bollag
- Department of Pathology Medical College of Georgia at Augusta University, Augusta, GA
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Cao D, Shou L, Wu Y, Dong X. The role of serum-free light chain ratios in the prediction of poor prognosis in multiple myeloma patients: a systematic review and meta-analysis. Hematology 2022; 27:1130-1139. [PMID: 36165782 DOI: 10.1080/16078454.2022.2127460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023] Open
Abstract
BACKGROUND The association between the serum free light chain (sFLC) ratio and the prognosis of multiple myeloma (MM) patients is controversial. AIM The purpose of this study is to explore the relationship between the sFLC ratio and the prognosis of MM patients through meta-analysis. METHODS Online public databases were searched to find relevant studies. The retrieval time is limited from the establishment of the database to July 2021. The overall survival (OS) and progression-free survival (PFS) rates were compared. The results were described using hazard ratio (HR) and a 95% confidence interval (CI). Qualitative studies were also included. RESULTS A total of 9 studies involving 2864 participants were included. A pooled analysis based on four studies including newly-diagnosed MM patients, demonstrated that an abnormal sFLC ratio was associated with poor outcomes of OS (HR = 1.82, 95% CI: 1.15-2.90) and PFS (HR = 1.87, 95% CI: 1.20-2.90). Three qualitative studies showed that an abnormal sFLC ratio was related with poor outcomes of OS (studies all included newly diagnosed MM patients) and PFS (two studies included newly-diagnosed MM patients and one study included non-newly-diagnosed MM patients). Two studies stated that the sFLC ratio is not associated with OS (both studies included non-newly-diagnosed MM patients) and one study reported that the sFLC ratio is not associated with PFS (study included non-newly-diagnosed MM patients). CONCLUSION sFLC ratio could be used to predict adverse outcomes in newly-diagnosed MM patients, but is not suitable for non-newly-diagnosed MM patients.
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Affiliation(s)
- Dan Cao
- Department of Hematology, Huzhou Central Hospital, Affiliated Central Hospital of Huzhou University, Huzhou, People's Republic of China
| | - Lihong Shou
- Department of Hematology, Huzhou Central Hospital, Affiliated Central Hospital of Huzhou University, Huzhou, People's Republic of China
| | - Ying Wu
- Department of Hematology, Huzhou Central Hospital, Affiliated Central Hospital of Huzhou University, Huzhou, People's Republic of China
| | - Xiaohui Dong
- Department of Hematology, Huzhou Central Hospital, Affiliated Central Hospital of Huzhou University, Huzhou, People's Republic of China
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The deubiquitinase OTUD1 regulates immunoglobulin production and proteasome inhibitor sensitivity in multiple myeloma. Nat Commun 2022; 13:6820. [PMID: 36357400 PMCID: PMC9649770 DOI: 10.1038/s41467-022-34654-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 10/31/2022] [Indexed: 11/12/2022] Open
Abstract
Serum monoclonal immunoglobulin (Ig) is the main diagnostic factor for patients with multiple myeloma (MM), however its prognostic potential remains unclear. On a large MM patient cohort (n = 4146), we observe no correlation between serum Ig levels and patient survival, while amount of intracellular Ig has a strong predictive effect. Focused CRISPR screen, transcriptional and proteomic analysis identify deubiquitinase OTUD1 as a critical mediator of Ig synthesis, proteasome inhibitor sensitivity and tumor burden in MM. Mechanistically, OTUD1 deubiquitinates peroxiredoxin 4 (PRDX4), protecting it from endoplasmic reticulum (ER)-associated degradation. In turn, PRDX4 facilitates Ig production which coincides with the accumulation of unfolded proteins and higher ER stress. The elevated load on proteasome ultimately potentiates myeloma response to proteasome inhibitors providing a window for a rational therapy. Collectively, our findings support the significance of the Ig production machinery as a biomarker and target in the combinatory treatment of MM patients.
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Schmitz A, Brøndum RF, Johnsen HE, Mellqvist UH, Waage A, Gimsing P, op Bruinink DH, van der Velden V, van der Holt B, Hansson M, Andersen NF, Frølund UC, Helleberg C, Schjesvold FH, Ahlberg L, Gulbrandsen N, Andreasson B, Lauri B, Haukas E, Bødker JS, Roug AS, Bøgsted M, Severinsen MT, Gregersen H, Abildgaard N, Sonneveld P, Dybkær K. Longitudinal minimal residual disease assessment in multiple myeloma patients in complete remission – results from the NMSG flow-MRD substudy within the EMN02/HO95 MM trial. BMC Cancer 2022; 22:147. [PMID: 35123422 PMCID: PMC8818194 DOI: 10.1186/s12885-022-09184-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 01/07/2022] [Indexed: 11/20/2022] Open
Abstract
Background Multiple myeloma remains an incurable disease with multiple relapses due to residual myeloma cells in the bone marrow of patients after therapy. Presence of small number of cancer cells in the body after cancer treatment, called minimal residual disease, has been shown to be prognostic for progression-free and overall survival. However, for multiple myeloma, it is unclear whether patients attaining minimal residual disease negativity may be candidates for treatment discontinuation. We investigated, if longitudinal flow cytometry-based monitoring of minimal residual disease (flow-MRD) may predict disease progression earlier and with higher sensitivity compared to biochemical assessments. Methods Patients from the Nordic countries with newly diagnosed multiple myeloma enrolled in the European-Myeloma-Network-02/Hovon-95 (EMN02/HO95) trial and undergoing bone marrow aspiration confirmation of complete response, were eligible for this Nordic Myeloma Study Group (NMSG) substudy. Longitdudinal flow-MRD assessment of bone marrow samples was performed to identify and enumerate residual malignant plasma cells until observed clinical progression. Results Minimal residual disease dynamics were compared to biochemically assessed changes in serum free light chain and M-component. Among 20 patients, reaching complete response or stringent complete response during the observation period, and with ≥3 sequential flow-MRD assessments analysed over time, increasing levels of minimal residual disease in the bone marrow were observed in six cases, preceding biochemically assessed disease and clinical progression by 5.5 months and 12.6 months (mean values), respectively. Mean malignant plasma cells doubling time for the six patients was 1.8 months (95% CI, 1.4–2.3 months). Minimal malignant plasma cells detection limit was 4 × 10–5. Conclusions Flow-MRD is a sensitive method for longitudinal monitoring of minimal residual disease dynamics in multiple myeloma patients in complete response. Increasing minimal residual disease levels precedes biochemically assessed changes and is an early indicator of subsequent clinical progression. Trial registration NCT01208766 Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-09184-1.
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Klein EM, Tichy D, Salwender HJ, Mai EK, Duerig J, Weisel KC, Benner A, Bertsch U, Akhavanpoor M, Besemer B, Munder M, Lindemann HW, Hose D, Seckinger A, Luntz S, Jauch A, Elmaagacli A, Fuhrmann S, Brossart P, Goerner M, Bernhard H, Raab MS, Blau IW, Haenel M, Scheid C, Goldschmidt H. Prognostic Impact of Serum Free Light Chain Ratio Normalization in Patients with Multiple Myeloma Treated within the GMMG-MM5 Trial. Cancers (Basel) 2021; 13:cancers13194856. [PMID: 34638344 PMCID: PMC8507729 DOI: 10.3390/cancers13194856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/19/2021] [Accepted: 09/22/2021] [Indexed: 11/16/2022] Open
Abstract
Simple Summary For multiple myeloma (MM) patients with measurable disease, there is no recommendation to monitor serum free light chains during therapy. However, this could provide important information in terms of prognosis. We investigated the prognostic impact of serum free light chain ratio (FLCr) normalization in 590 patients with secretory MM during first-line treatment within the German-Speaking Myeloma Multicenter Group MM5 trial. We are able to show that there is an increasing percentage of patients who achieve FLCr normalization during therapy. Importantly, we demonstrate that FLCr normalization at any time before the start of maintenance is significantly associated with prolonged progression-free and overall survival in multivariable time-dependent Cox regression analyses. This suggests that FLCr normalization during therapy is an important and simple way to assess prognostic factor in MM and supports the serial measurement of serum free light chains during therapy, even in patients with secretory MM. Abstract We investigated the prognostic impact of time-dependent serum free light chain ratio (FLCr) normalization in 590 patients with secretory multiple myeloma (MM) during first-line treatment within the German-Speaking Myeloma Multicenter Group MM5 trial. Serum free light chains (sFLC) were assessed by the Freelite test at baseline, after induction, mobilization, autologous blood stem cell transplantation, consolidation and every three months during maintenance or follow up within two years after the start of maintenance. The proportion of patients with a normal or normalized FLCr increased from 3.6% at baseline to 23.2% after induction and 64.7% after consolidation. The achievement of FLCr normalization at any one time before the start of maintenance was associated with significantly prolonged progression-free survival (PFS) (p < 0.01, hazard ratio (HR) = 0.61, 95% confidence interval (95% CI) = 0.47–0.79) and overall survival (OS) (p = 0.02, HR = 0.67, 95% CI = 0.48–0.93) in multivariable time-dependent Cox regression analyses. Furthermore, reaching immune reconstitution, defined as the normalization of uninvolved immunoglobulins, before maintenance was associated with superior PFS (p = 0.04, HR = 0.77, 95% CI = 0.60–0.99) and OS (p = 0.01, HR = 0.59, 95% CI = 0.41–0.86). We conclude that FLCr normalization during therapy is an important favorable prognostic factor in MM. Therefore, we recommend serial measurements of sFLC during therapy until achieving FLCr normalization, even in patients with secretory MM.
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Affiliation(s)
- Eva-Maria Klein
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
- Department of Internal Medicine 5, Klinikum Nuremberg, Paracelsus Medical University, 90419 Nuremberg, Germany
- Correspondence: ; Tel.: +49-911-398-114957
| | - Diana Tichy
- Division of Biostatistics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (D.T.); (A.B.)
| | - Hans J. Salwender
- Asklepios Tumorzentrum Hamburg, AK Altona and AK St. Georg, 22763 Hamburg, Germany;
| | - Elias K. Mai
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
| | - Jan Duerig
- Department of Hematology, University Clinic Essen, 45147 Essen, Germany;
| | - Katja C. Weisel
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section of Pneumology, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany;
| | - Axel Benner
- Division of Biostatistics, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany; (D.T.); (A.B.)
| | - Uta Bertsch
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
- National Center for Tumor Diseases, 69120 Heidelberg, Germany
| | - Mabast Akhavanpoor
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
| | - Britta Besemer
- Department of Hematology, Oncology and Immunology, University Hospital Tübingen, 72076 Tübingen, Germany;
| | - Markus Munder
- Department of Internal Medicine III, University Medical Center Mainz, 55131 Mainz, Germany;
| | - Hans-Walter Lindemann
- Department of Hematology and Oncology, Katholisches Krankenhaus Hagen, 58097 Hagen, Germany;
| | - Dirk Hose
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
| | - Anja Seckinger
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
| | - Steffen Luntz
- Coordination Centre for Clinical Trials (KKS) Heidelberg, 69120 Heidelberg, Germany;
| | - Anna Jauch
- Institute of Human Genetics, University of Heidelberg, 69120 Heidelberg, Germany;
| | - Ahmet Elmaagacli
- Department of Hematology and Oncology, Asklepios Hospital Hamburg St. Georg, 20099 Hamburg, Germany;
| | - Stephan Fuhrmann
- Department of Hematology and Oncology, Helios Hospital Berlin Buch, 13125 Berlin, Germany;
| | - Peter Brossart
- Department of Internal Medicine, Oncology, Hematology, Immuno-Oncology and Rheumatology/Clinical Immunology, University Hospital Bonn, 53127 Bonn, Germany;
| | - Martin Goerner
- Department of Hematology, Oncology and Palliative Care, Klinikum Bielefeld, 33604 Bielefeld, Germany;
| | - Helga Bernhard
- Internal Medicine V, Klinikum Darmstadt, 64283 Darmstadt, Germany;
| | - Marc S. Raab
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
| | - Igor W. Blau
- Medical Clinic, Charité University Medicine Berlin, 13353 Berlin, Germany;
| | - Mathias Haenel
- Department of Internal Medicine III, Klinikum Chemnitz, 09116 Chemnitz, Germany;
| | - Christof Scheid
- Department of Internal Medicine I, University Hospital Cologne, 50937 Cologne, Germany;
| | - Hartmut Goldschmidt
- Department of Medicine V, Hematology, Oncology and Rheumatology, University of Heidelberg, 69120 Heidelberg, Germany; (E.K.M.); (U.B.); (M.A.); (D.H.); (A.S.); (M.S.R.); (H.G.)
- National Center for Tumor Diseases, 69120 Heidelberg, Germany
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Quantification of measurable residual disease in patients with multiple myeloma based on the IMWG response criteria. Sci Rep 2021; 11:14956. [PMID: 34294772 PMCID: PMC8298479 DOI: 10.1038/s41598-021-94191-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Accepted: 07/07/2021] [Indexed: 11/09/2022] Open
Abstract
Stringent complete response (sCR) is defined as a deeper response than complete response (CR) in multiple myeloma. Whether achieving sCR correlates with better survival remains controversial. We evaluated the outcomes in patients with intact immunoglobulin multiple myeloma (IIMM) and light chain multiple myeloma (LCMM) who achieved a very good partial response (VGPR) or better. Multicolour flow cytometry was used to assess the depth of response. LCMM patients with sCR had significantly lower measurable residual disease (MRD) levels than those with CR (median MRD: 7.9 × 10-4 vs. 5.6 × 10-5, P < 0.01). Nonetheless, no significant difference was observed in MRD levels across the responses in groups of patients with IIMM (VGPR vs. CR: 3.5 × 10-4 vs. 7.0 × 10-5, P = 0.07; CR vs. sCR: 7.0 × 10-5 vs. 5.4 × 10-5, P = 0.81. In accordance with MRD levels, the median overall survival of patients with sCR was significantly longer (sCR, CR, VGPR; not reached, 41 months, and 58 months, respectively; VGPR vs. CR, P = 0.83; CR vs. sCR, P = 0.04) in LCMM, but not in IIMM (sCR, CR, VGPR; not reached, 41 months, and not reached, respectively; VGPR vs. CR, P = 0.59; CR vs. sCR; P = 0.10). Our results show that sCR represents a deeper response that correlates with longer survival in patients with LCMM, but not IIMM.
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Utility of serum free light chain ratio in response definition in patients with multiple myeloma. Blood Adv 2021; 4:322-326. [PMID: 31978213 DOI: 10.1182/bloodadvances.2019001099] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 12/09/2019] [Indexed: 11/20/2022] Open
Abstract
Key PointsPatients with an abnormal sFLC ratio because of LC suppression have outcomes similar to those with a normal ratio. sFLC ratio has prognostic value in patients achieving CR who have an absence of clonal BMPCs assessed by MFC.
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ALADAĞ E, DEMİROĞLU H, BÜYÜKAŞIK Y, TURGUT M, AKSU S, SAYINALP N, HAZNEDAROĞLU İC, ÖZCEBE Oİ, GÖKER H. CD34+ hematopoietic progenitor cell dose as a predictor of engraftment and survival in multiple myeloma patients undergoing autologous stem cell transplantation. Turk J Med Sci 2020; 50:1851-1856. [PMID: 32512672 PMCID: PMC7775700 DOI: 10.3906/sag-2001-173] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 06/05/2020] [Indexed: 01/11/2023] Open
Abstract
Background/aim High-dose melphalan and autologous hematopoietic stem cell transplantation (AHSCT) is the standard treatment strategy for multiple myeloma (MM) patients who are eligible for it. The recommended dose of CD34+ hematopoietic progenitor cells (HPCs) for adequate engraftment is above 2 × 106/kg. The aim of this study was to evaluate the relationship between the dose of CD34+HPCs and survival in MM patients who underwent AHSCT at a tertiary care center. Materials and methods Enrolled in this study were 271 MM patients who underwent AHSCT between 2003 and 2019. Clinical characteristics of the patients, disease status pre-AHSCT, reinfused CD34+ cell doses, and neutrophil and platelet engraftment days were recorded, retrospectively. The patients were divided into 2 groups according to whether the dose of reinfused CD 34+ HPCs was <5 × 106/kg or ≥5 × 106/kg. The groups were compared in terms of engraftment and overall survival (OS) times. Results The median age of the patients was 54.8 (33–76) years. The median dose of infused CD34+ HPCs was 5.94 × 106/kg (1.47–59.5 × 106/kg). The median follow-up period was 54 months (4–211). The median OS of the patients was 103 months (11–144). The median neutrophil and platelet engraftment time was 10 (8–24) and 11 (7–40) days. Doses of <5 × 106/kg and ≥5 × 106/kg CD34+ HPC were reinfused in 38.1% and 61.9% of the patients, respectively. There was a negative significant correlation between the reinfused CD34+cell level and neutrophil/platelet engraftment times (r = –0.32, P < 0.001; r = –0.27, P < 0.001, respectively). The median OS times were observed as 103 months (11–144) and 145 months (123–166) for patients who had been administered <5 × 106/kg and ≥5 × 106/kg of CD34+ HPCs, respectively (P = 0.009). Conclusion The increased amount of CD34+ autologous hematopoietic stem cell dose after high dose melphalan chemotherapy in MM patients shortened the platelet and neutrophil engraftment time and increased OS. Early platelet engraftment and administration of a CD34+ HPC count that is ≥5 × 106/kg can be considered as predictors of better survival in patients.
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Affiliation(s)
- Elifcan ALADAĞ
- Department of Hematology, Faculty of Medicine, Hacettepe University, AnkaraTurkey
| | - Haluk DEMİROĞLU
- Department of Hematology, Faculty of Medicine, Hacettepe University, AnkaraTurkey
| | - Yahya BÜYÜKAŞIK
- Department of Hematology, Faculty of Medicine, Hacettepe University, AnkaraTurkey
| | - Mehmet TURGUT
- Department of Hematology, Faculty of Medicine, Ondokuz Mayıs University, SamsunTurkey
| | - Salih AKSU
- Department of Hematology, Faculty of Medicine, Hacettepe University, AnkaraTurkey
| | - Nilgün SAYINALP
- Department of Hematology, Faculty of Medicine, Hacettepe University, AnkaraTurkey
| | | | - Osman İlhami ÖZCEBE
- Department of Hematology, Faculty of Medicine, Hacettepe University, AnkaraTurkey
| | - Hakan GÖKER
- Department of Hematology, Faculty of Medicine, Hacettepe University, AnkaraTurkey
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Tarragón B, Ye N, Gallagher M, Sen S, Portolés JM, Wang AY. Effect of high cut-off dialysis for acute kidney injury secondary to cast nephropathy in patients with multiple myeloma: a systematic review and meta-analysis. Clin Kidney J 2020; 14:1894-1900. [PMID: 34345412 PMCID: PMC8323139 DOI: 10.1093/ckj/sfaa220] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 09/18/2020] [Indexed: 12/03/2022] Open
Abstract
Background Acute kidney injury (AKI) caused by cast nephropathy is associated with increased morbidity and mortality among patients with multiple myeloma (MM). High cut-off haemodialysis (HCO-HD) has proven to be effective in the removal of serum light chains but the effect on clinical outcomes, especially renal recovery, remains uncertain. Methods A systematic review and meta-analysis were performed examining all randomized controlled trials (RCTs) and observational studies (OBSs) assessing the effect of HCO-HD on clinical outcomes of patients with MM complicated by cast nephropathy–induced severe AKI. The primary outcome was all-cause mortality at the end of the study. The secondary outcomes included all-cause mortality at 12 months, HD independence and serum kappa and lambda light chain reduction. Pooled analysis was performed using random effects models. Results We identified five studies, comprising two RCTs and three retrospective cohort studies, including 276 patients with a mean follow-up of 18.7 months. The majority of the studies were of suboptimal quality and underpowered. Compared with patients treated with conventional HD, HCO-HD was not associated with a survival benefit at 12 months {five studies, 276 patients, relative risk [RR] 1.02 [95% confidence interval (CI) 0.76–1.35], I2 = 33.9%} or at the end of the studies at an average of 34 months [five studies, 276 patients, RR 1.32 (95% CI 0.71–2.45), I2 = 62.0%]. There was no difference in HD independence at 90 days [two trials, 78 patients, RR 2.23 (95% CI 1.09–4.55)], 6 months [two studies, 188 patients, RR 1.19 (95% CI 0.68–2.06)] or 12 months [two studies, 188 patients, RR 1.14 (95% CI 0.58–2.26)]. Patients receiving HCO dialysis, however, had a greater reduction in serum kappa [two studies, 188 patients, weighted mean difference (WMD) 46.7 (95% CI 38.6–54.7), I2 = 52.0%] and lambda [two studies, 188 patients, WMD 50.3 (95% CI 21.4–79.3), I2 = 95.1%] light chain levels. Conclusion Current evidence from RCTs and OBSs suggests HCO dialysis is able to reduce serum free light chains but makes no significant improvement in all-cause mortality and renal outcomes compared with conventional HD for patients with myeloma cast nephropathy. However, there is a trend towards better renal outcomes with the use of HCO dialysis. The lack of long-term data and the small sample sizes of the included studies limit this analysis. Therefore further large-scale RCTs with longer follow-up are needed to assess the effect of HCO dialysis on clinical outcomes in patients with myeloma cast nephropathy.
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Affiliation(s)
- Blanca Tarragón
- Department of Nephrology, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain.,Renal and Metabolic Division, George Institute for Global Health, University of New South Wales, Sydney, NSW, Australia
| | - Nan Ye
- Renal and Metabolic Division, George Institute for Global Health, University of New South Wales, Sydney, NSW, Australia.,Division of Nephrology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Martin Gallagher
- Renal and Metabolic Division, George Institute for Global Health, University of New South Wales, Sydney, NSW, Australia.,Department of Renal Medicine, Concord Repatriation General Hospital, Concord, NSW, Australia
| | - Shaundeep Sen
- Department of Renal Medicine, Concord Repatriation General Hospital, Concord, NSW, Australia.,Concord Clinical School, The University of Sydney, Sydney, NSW, Australia
| | - Jose Maria Portolés
- Department of Nephrology, Hospital Universitario Puerta de Hierro Majadahonda, Madrid, Spain.,REDInREN Instituto Salud Carlos III 016/009/009, Public Health Research Network, Madrid, Spain
| | - Amanda Y Wang
- Renal and Metabolic Division, George Institute for Global Health, University of New South Wales, Sydney, NSW, Australia.,Department of Renal Medicine, Concord Repatriation General Hospital, Concord, NSW, Australia.,Concord Clinical School, The University of Sydney, Sydney, NSW, Australia
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12
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Du J, Lu J, Gao W, Liu J, He H, Li L, Li R, Zhou L, Jiang H, Chen W, Fu W, Hou J. Serum-free light chains combined with the Revised International Staging System could further distinguish the superior and inferior clinical outcome of multiple myeloma patients. Ann Hematol 2020; 99:1779-1791. [PMID: 32594218 DOI: 10.1007/s00277-020-04162-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2019] [Accepted: 06/18/2020] [Indexed: 10/24/2022]
Abstract
The Revised International Staging System (R-ISS) was introduced as a powerful prognostic system to stratify patients with newly diagnosed multiple myeloma (NDMM). The serum-free light chain (sFLC) has been developed as a valuable marker to monitor multiple myeloma (MM) progression and response. Therefore, it is imperative to combine R-ISS and sFLC prognostic factors as modified R-ISS (MR-ISS) to better stratify patients into homogeneous survival subgroups, especially to further distinguish the high-risk MM patients who are likely to experience rapid progression or relapse. A total of 595 patients with NDMM were studied retrospectively. We performed the K-adaptive partitioning in 595 NDMM patients to define the MR-ISS classification: stage I includes R-ISS stage I and sFLC ratio < 80 (n = 66); stage III includes R-ISS stage III with sFLC ratio ≥ 80 (n = 87); stage II includes all the remaining conditions (n = 442). The median OS was not reached for MR-ISS stage I, 48.67 months for stage II, and 21.13 months for stage III. A significant OS difference of MR-ISS stage I and III patients has a particularly superior and inferior outcome compared with R-ISS stage I and III, respectively, which showed the similar results in PFS analysis. Validation of results was performed in an independent cohort. Our data indicate that the MR-ISS provides an improved prognostic power compared with R-ISS.
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Affiliation(s)
- Juan Du
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China.
| | - Jing Lu
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China
| | - Wen Gao
- Department of Hematology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Jin Liu
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China
| | - Haiyan He
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China
| | - Lu Li
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China
| | - Rong Li
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China
| | - Lili Zhou
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China
| | - Hua Jiang
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China
| | - Wenming Chen
- Department of Hematology, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Weijun Fu
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China.
| | - Jian Hou
- Department of Hematology, The Myeloma & Lymphoma Center, Shanghai Changzheng Hospital, The Second Military Medical University, 415 Fengyang Rd, Shanghai, 200003, China.
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13
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Jew S, Chang T, Bujarski S, Soof C, Chen H, Safaie T, Li M, Sanchez E, Wang C, Spektor TM, Emamy-Sadr M, Swift R, Rahbari A, Patil S, Souther E, Berenson JR. Normalization of serum B-cell maturation antigen levels predicts overall survival among multiple myeloma patients starting treatment. Br J Haematol 2020; 192:272-280. [PMID: 32441777 DOI: 10.1111/bjh.16752] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 04/23/2020] [Indexed: 01/24/2023]
Abstract
Serum B-cell maturation antigen (sBCMA) is a novel biomarker for B-cell malignancies. A normal reference range (<82·59 ng/ml) has been recently established but the impact of achieving normal levels to outcomes for patients receiving treatment for B-cell malignancies has not been studied. We first found that among multiple myeloma (MM) patients starting a new treatment, those who begin treatment within normal sBCMA limits (<82·59 ng/ml) have improved progression-free survival (PFS; P = 0·0398) and overall survival (OS; P = 0·0217) than those who do not. Furthermore, among patients who begin treatment with elevated (≥82·59 ng/ml) sBCMA levels, we assessed the relationship of a decrease in sBCMA to the normal range to OS and found that those who normalize sBCMA demonstrated improved OS (P = 0·0078). Normalizing patients also experienced a markedly improved overall response rate (P < 0·0001). Moreover, all patients who achieved complete remission (CR) showed normalization of sBCMA, and time to normalization (median 0·9 months) was faster than time to CR (5·0 months; P = 0·0036) for these patients. These results suggest that normalization of sBCMA may be an accurate predictor of OS for MM patients during treatment and predict for a higher likelihood of response.
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Affiliation(s)
- Scott Jew
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA.,James R. Berenson, MD, Inc., West Hollywood, CA, USA
| | - Tiffany Chang
- James R. Berenson, MD, Inc., West Hollywood, CA, USA
| | - Sean Bujarski
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA.,James R. Berenson, MD, Inc., West Hollywood, CA, USA
| | - Camilia Soof
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA
| | - Haiming Chen
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA
| | | | - Mingjie Li
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA
| | - Eric Sanchez
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA
| | - Cathy Wang
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA
| | | | | | - Regina Swift
- James R. Berenson, MD, Inc., West Hollywood, CA, USA
| | - Ashkon Rahbari
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA
| | - Saurabh Patil
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA
| | | | - James R Berenson
- Institute for Myeloma & Bone Cancer Research, West Hollywood, CA, USA.,James R. Berenson, MD, Inc., West Hollywood, CA, USA.,OncoTracker, West Hollywood, CA, USA
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14
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The Role of 18F-FDG PET/CT in Multiple Myeloma Staging according to IMPeTUs: Comparison of the Durie-Salmon Plus and Other Staging Systems. CONTRAST MEDIA & MOLECULAR IMAGING 2018; 2018:4198673. [PMID: 30154686 PMCID: PMC6091330 DOI: 10.1155/2018/4198673] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 05/23/2018] [Accepted: 05/31/2018] [Indexed: 12/30/2022]
Abstract
We aimed at comparing the Durie–Salmon Plus (DS Plus) staging system based on Italian Myeloma criteria for PET USe (IMPeTUs) with other two staging systems in predicting prognosis of patients with all stages of newly diagnosed multiple myeloma (MM). A total of 33 MM patients were enrolled in this retrospective study. The variation between the DS Plus classification and Durie–Salmon staging system (DSS) or Revised International Staging System (RISS) classification was assessed. When staged by the DSS, patients in stage I and stage II did not reach the median overall survival (OS), and the median OS was 33 months for stage III (p=0.3621). When staged by the DS Plus, patients in stage I did not reach the median OS of stage I, and the median OS for stages II and III was 38 and nine months, respectively (p=0.0064). When staged by the RISS, patients in stage I did not reach the median OS, and the median OS was 33 and 16 months for stage II and stage III, respectively (p=0.0319). The concordances between two staging systems were 0.07 (DS Plus versus DSS) and 0.37 (DS Plus versus RISS), respectively. Multivariate analysis revealed that DS Plus stage III (HR: 11.539, p=0.021) and the Deauville score of bone marrow ≥4 (HR: 3.487, p=0.031) were independent prognostic factors associated with OS. Both the DS Plus based on IMPeTUs and RISS possessed a better potential in characterizing and stratifying MM patients compared with the DSS. Moreover, DS Plus stage III and the Deauville score of bone marrow ≥4 were reliable prognostic factors in newly diagnosed MM patients.
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15
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Using Both Lactic Dehydrogenase Levels and the Ratio of Involved to Uninvolved Free Light Chain Levels as Risk Factors Improves Risk Assessment in Patients With Newly Diagnosed Multiple Myeloma. Am J Med Sci 2018; 355:350-356. [PMID: 29661348 DOI: 10.1016/j.amjms.2017.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 12/03/2017] [Accepted: 12/06/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND This study aimed to evaluate the prognostic value of the ratio of involved to uninvolved free light chain (rFLC) levels and lactic dehydrogenase (LDH) levels in the risk stratification of patients with multiple myeloma (MM). MATERIALS AND METHODS Clinical data of 283 patients with newly diagnosed MM were retrospectively analyzed. RESULTS In the traditional chemotherapy group, patients with an rFLC < 100 had a better prognosis than those with an rFLC ≥ 100 (40 months versus 6 months, P = 0.022), as did patients with an LDH ≤ upper limit of normal (ULN) compared to those with an LDH > ULN (29 months versus 6 months, P = 0.023). In patients who underwent novel drug-combined therapy, no significant difference was observed between the rFLC < 100 group and the rFLC ≥ 100 group (54 months versus median not reached, P = 0.508). However, patients with an LDH ≤ ULN had a better prognosis than those with an LDH > ULN (60 months versus 21 months, P = 0.004). Using an rFLC ≥ 100 and an LDH ≥ ULN as adverse risk factors, patients were classified into 3 groups: group 1 (no adverse risk factors), group 2 (1 adverse risk factor) and group 3 (2 adverse risk factors). The median overall survival (OS) of groups 1, 2 and 3 was 52 months, 34 months and 15 months, respectively (P = 0.001). CONCLUSIONS rFLC and LDH levels were sensitive prognostic factors in MM patients, combining them could improve the risk stratification and treatment choice of patients in clinical practice.
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16
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Serological Immunoglobulin-Free Light Chain Profile in Myasthenia Gravis Patients. J Immunol Res 2018; 2018:9646209. [PMID: 29765992 PMCID: PMC5889870 DOI: 10.1155/2018/9646209] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 01/29/2018] [Indexed: 12/12/2022] Open
Abstract
Background Serological levels of free immunoglobulin light chains (FLCs), produced in excess of heavy chains during synthesis of immunoglobulins by plasma cells, can be considered a direct marker of B cell activity in different systemic inflammatory-autoimmune conditions and may represent a useful predictor of rituximab (RTX) therapeutic efficacy, as reported for rheumatoid arthritis and systemic lupus erythematosus. Myasthenia gravis (MG) is an autoimmune disease of the neuromuscular junction with antibodies (abs) targeting the acetylcholine receptor (AChR) or the muscle-specific tyrosine kinase (MuSK), inducing muscle weakness and excessive fatigability. As MG course may be remarkably variable, we evaluated the possible use of FLCs as biomarkers of disease activity. Subjects and Methods We assessed FLC levels in 34 sera from 17 AChR-MG and from 13 MuSK-MG patients, in comparison with 20 sera from patients with systemic autoimmune rheumatic diseases and 18 from healthy blood donors, along with titers of specific auto-abs and IgG subclass distribution. Results We found a statistically significant increase in free κ chains in both AChR- and MuSK-MG patients, while free λ chain levels were increased only in AChR-MG. We also observed a significant reduction of both free κ and λ chains in 1/4 MuSK-MG patients along with specific abs titer, two months after RTX treatment. Conclusions From our data, FLCs appear to be a sensitive marker of B cell activation in MG. Further investigations are necessary to exploit their potential as reliable biomarkers of disease activity.
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17
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Pre-treatment red blood cell distribution width provides prognostic information in multiple myeloma. Clin Chim Acta 2018; 481:34-41. [PMID: 29452082 DOI: 10.1016/j.cca.2018.02.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 01/16/2018] [Accepted: 02/10/2018] [Indexed: 12/30/2022]
Abstract
BACKGROUND The red blood cell distribution width (RDW), a credible marker for abnormal erythropoiesis, has recently been studied as a prognostic factor in oncology, but its role in multiple myeloma (MM) hasn't been thoroughly investigated. METHODS We performed a retrospective study in 162 patients with multiple myeloma. Categorical parameters were analyzed using Pearson chi-squared test. The Mann-Whitney and Wilcoxon tests were used for group comparisons. Comparisons of repeated samples data were analyzed with the general linear model repeated-measures procedure. The Kaplan-Meier product-limit method was used to determine OS and PFS, and the differences were assessed by the log-rank test. RESULTS High RDW baseline was significantly associated with indexes including haemoglobin, bone marrow plasma cell infiltration, and cytogenetics risk stratification. After chemotherapy, the overall response rate (ORR) decreased as RDW baseline increased. In 24 patients with high RDW baseline, it was revealed RDW value decreased when patients achieved complete remission (CR), but increased when the disease progressed. The normal-RDW baseline group showed both longer overall survival (OS) and progression-free survival (PFS) than the high-RDW baseline group. CONCLUSION Our study suggests pre-treatment RDW level is a prognostic factor in MM and should be regarded as an important parameter for assessment of therapeutic efficiency.
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18
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Argyropoulos CP, Chen SS, Ng YH, Roumelioti ME, Shaffi K, Singh PP, Tzamaloukas AH. Rediscovering Beta-2 Microglobulin As a Biomarker across the Spectrum of Kidney Diseases. Front Med (Lausanne) 2017; 4:73. [PMID: 28664159 PMCID: PMC5471312 DOI: 10.3389/fmed.2017.00073] [Citation(s) in RCA: 163] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 05/26/2017] [Indexed: 12/28/2022] Open
Abstract
There is currently an unmet need for better biomarkers across the spectrum of renal diseases. In this paper, we revisit the role of beta-2 microglobulin (β2M) as a biomarker in patients with chronic kidney disease and end-stage renal disease. Prior to reviewing the numerous clinical studies in the area, we describe the basic biology of β2M, focusing in particular on its role in maintaining the serum albumin levels and reclaiming the albumin in tubular fluid through the actions of the neonatal Fc receptor. Disorders of abnormal β2M function arise as a result of altered binding of β2M to its protein cofactors and the clinical manifestations are exemplified by rare human genetic conditions and mice knockouts. We highlight the utility of β2M as a predictor of renal function and clinical outcomes in recent large database studies against predictions made by recently developed whole body population kinetic models. Furthermore, we discuss recent animal data suggesting that contrary to textbook dogma urinary β2M may be a marker for glomerular rather than tubular pathology. We review the existing literature about β2M as a biomarker in patients receiving renal replacement therapy, with particular emphasis on large outcome trials. We note emerging proteomic data suggesting that β2M is a promising marker of chronic allograft nephropathy. Finally, we present data about the role of β2M as a biomarker in a number of non-renal diseases. The goal of this comprehensive review is to direct attention to the multifaceted role of β2M as a biomarker, and its exciting biology in order to propose the next steps required to bring this recently rediscovered biomarker into the twenty-first century.
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Affiliation(s)
- Christos P Argyropoulos
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Shan Shan Chen
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Yue-Harn Ng
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Maria-Eleni Roumelioti
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Kamran Shaffi
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Pooja P Singh
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States
| | - Antonios H Tzamaloukas
- Nephrology Division, Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, NM, United States.,Raymond G. Murphy VA Medical Center Albuquerque, Albuquerque, NM, United States
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