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Das N, Panda D, Gajendra S, Gupta R, Thakral D, Kaur G, Khan A, Singh VK, Vemprala A, Bakhshi S, Seth R, Sahoo RK, Sharma A, Rai S, Prajapati VK, Singh S. Immunophenotypic characterization of leukemic stem cells in acute myeloid leukemia using single tube 10-colour panel by multiparametric flow cytometry: Deciphering the spectrum, complexity and immunophenotypic heterogeneity. Int J Lab Hematol 2024; 46:646-656. [PMID: 38456256 DOI: 10.1111/ijlh.14250] [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: 07/12/2023] [Accepted: 01/30/2024] [Indexed: 03/09/2024]
Abstract
INTRODUCTION Despite extensive research, comprehensive characterization of leukaemic stem cells (LSC) and information on their immunophenotypic differences from normal haematopoietic stem cells (HSC) is lacking. Herein, we attempted to unravel the immunophenotypic (IPT) characteristics and heterogeneity of LSC using multiparametric flow cytometry (MFC) and single-cell sequencing. MATERIALS AND METHODS Bone marrow aspirate samples from patients with acute myeloid leukaemia (AML) were evaluated using MFC at diagnostic and post induction time points using a single tube-10-colour-panel containing LSC-associated antibodies CD123, CD45RA, CD44, CD33 and COMPOSITE (CLL-1, TIM-3, CD25, CD11b, CD22, CD7, CD56) with backbone markers that is, CD45, CD34, CD38, CD117, sCD3. Single-cell sequencing of the whole transcriptome was also done in a bone marrow sample. RESULTS LSCs and HSCs were identified in 225/255 (88.2%) and 183/255 (71.6%) samples, respectively. Significantly higher expression was noted for COMPOSITE, CD45RA, CD123, CD33, and CD44 in LSCs than HSCs (p < 0.0001). On comparing the LSC specific antigen expressions between CD34+ (n = 184) and CD34- LSCs (n = 41), no difference was observed between the groups. More than one sub-population of LSC was demonstrated in 4.4% of cases, which further revealed high concordance between MFC and single cell transcriptomic analysis in one of the cases displaying three LSC subpopulations by both methods. CONCLUSION A single tube-10-colour MFC panel is proposed as an easy and reproducible tool to identify and discriminate LSCs from HSCs. LSCs display both inter- and intra-sample heterogeneity in terms of antigen expressions, which opens the facets for single cell molecular analysis to elucidate the role of subpopulations of LSCs in AML progression.
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Affiliation(s)
- Nupur Das
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Devasis Panda
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Smeeta Gajendra
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Ritu Gupta
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Deepshi Thakral
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Gurvinder Kaur
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Aafreen Khan
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Vivek Kumar Singh
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Arushi Vemprala
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Sameer Bakhshi
- Department of Medical Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Rachna Seth
- Department of Paediatrics, Dr. BRAIRCH, AIIMS, New Delhi, India
| | | | - Atul Sharma
- Department of Medical Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Sandeep Rai
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Vijay K Prajapati
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
| | - Saroj Singh
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India
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Gupta R, Jevremovic D, Mathew SJ, Kumar S. Multiparametric Flow Cytometry in the Evaluation of Plasma Cell Proliferative Disorders: Current Paradigms for Clinical Practice. CLINICAL LYMPHOMA, MYELOMA & LEUKEMIA 2024; 24:e88-e95. [PMID: 38142203 DOI: 10.1016/j.clml.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 11/21/2023] [Accepted: 11/23/2023] [Indexed: 12/25/2023]
Abstract
Diagnosis of plasma cell proliferative disorders (PCPDs) is primarily based on the demonstration of monoclonal protein (M-Protein) in blood and/ or urine which often precedes clinical manifestations of the disease. The basic pathophysiology behind the M-protein presence is the proliferation of clonal plasma cells (PCs) in bone marrow or extramedullary sites and is assessed using cytomorphology and immunophenotyping. The role of multiparametric flow cytometry (MFC) for PC identification is technically the most valuable tool in this context as it characterizes as well as quantifies the clonal PCs based on differential expression of various immunophenotypic (IPT) markers. From a diagnostic perspective, MFC is critical in the definite identification of the clonal PCs and delineates benign and borderline entities at one end of the spectrum (MGUS, SMM) with lower clonal PC% and, malignant diseases at the other end (MM and PCL) with higher clonal PC fraction. The role of MFC in assessment of measurable residual disease (MRD) and monitoring of progression in MM and various PCPDs has been validated in multiple clinical studies and is probably one of the most promising tools for predicting treatment outcomes. Furthermore, MFC also plays a crucial role in disease prognostication based on specific IPT profiles. An additional role of MFC in the current clinical scenario is the evaluation of tumor microenvironment based on immune cell repertoire, which is reflecting encouraging results across. Thus, in the current review we concisely describe the role of MFC as a reliable and essential modality in PCPDs, from diagnosis to prediction of treatment outcome and disease monitoring.
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Affiliation(s)
- Ritu Gupta
- Department of Laboratory Oncology, Dr. BRAIRCH, AIIMS, New Delhi, India; Department of Hematology, Mayo Clinic, Rochester, MN.
| | - Dragan Jevremovic
- Department of Laboratory Medicine & Pathology, Mayo Clinic, Rochester, MN
| | | | - Shaji Kumar
- Department of Hematology, Mayo Clinic, Rochester, MN
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Rai S, Das N, Gupta R, Kumar L, Sharma A, Singh S, Prajapati VK. Utility of CD229 as novel marker in measurable residual disease assessment in multiple myeloma-An evidence-based approach. Int J Lab Hematol 2023; 45:179-186. [PMID: 36403963 DOI: 10.1111/ijlh.13992] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 10/25/2022] [Indexed: 11/22/2022]
Abstract
INTRODUCTION CD229 has been found to be a useful plasma cell (PC) gating marker in multiple myeloma (MM). This study analyses the expression profile of CD229 on various bone marrow compartments namely, PC, non-PC and hematogones (HGs) using Multiparameter flow cytometry (MFC). Furthermore, it evaluates the ability of CD229 to delineate normal PC (NPC) from aberrant PC (APC) in measurable residual disease assessment (MRD) in MM. METHODS Bone marrow aspirates from patients diagnosed with MM (per standard IMWG criteria) were collected in EDTA and processed for MFC using a single tube 14-color antibody panel as per standard operating procedure. RESULTS A total of 74 patients with a diagnosis of MM (26 treatment naïve and 48 on therapy) were evaluated. The expression of CD229 was homogenous on both the PC and HG compartments as compared to CD138 and CD38. On comparing the expression of individual markers, it was found to be statistically significant between PC, HGs and non-PC for all three markers (p < 0.001). APC showed lower median expression of CD38 and higher median expression of CD138 and CD229 as compared to NPC and was found to be statistically significant for all markers (p < 0.001). In terms of differential expression on NPC and APC; CD38 was found to be the most aberrantly expressed (70%; 52/74) followed by CD229 (7%; 5/74) and CD138 (5%; 4/74). CONCLUSIONS CD229 can be used for the identification of PC and due to relatively homogenous expression; it can be used as a suitable marker for targeted therapies. However, precise discrimination of NPC from APC cannot be reliably achieved with CD229, limiting its utility as a useful marker of diagnostic relevance and MRD assessment in MM.
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Affiliation(s)
- Sandeep Rai
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Nupur Das
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Ritu Gupta
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Lalit Kumar
- Department of Medical Oncology, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Atul Sharma
- Department of Medical Oncology, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Saroj Singh
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Vijay K Prajapati
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
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Das N, Dahiya M, Gupta R, Kumar L, Rani L, Gupta A, Farswan A, Sharma A, Sharma OD. Graded Depth of Response and Neoplastic Plasma Cell Index as Indicators of Survival Outcomes in Patients With Multiple Myeloma Following Autologous Stem Cell Transplant. Am J Clin Pathol 2023; 159:69-80. [PMID: 36317501 DOI: 10.1093/ajcp/aqac129] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 09/13/2022] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVES With a substantial number of patients with multiple myeloma (MM) experiencing disease relapse, the quest for more sensitive methods to assess deeper responses indicative of cure continues. METHODS In this prospective analysis of 170 patients with MM at day 100 after autologous stem cell transplant, we evaluated the predictive value of conventional response, measurable residual disease (MRDTOTAL: the aberrant percentage of plasma cells [PC%] among total bone marrow cells), and neoplastic plasma cell index scores (NPCI: the aberrant PC% of total PCs). RESULTS Significantly better progression-free survival (PFS) and overall survival (OS) were observed with deepening conventional response. Conventional response-based stratification within the MRD-positive and MRD-negative subgroups showed a significantly higher PFS (hazard ratio [HR], 3.11; P < .005) and OS (HR, 3.08; P = .01) in the conventional response-positive/MRD-positive group compared with the conventional response-negative/MRD-positive group. Using K-adaptive partitioning to find the optimum threshold for MRD, patients achieving less than 0.001% MRDTOTAL had superior PFS (MRDTOTAL 0.001% to <0.1%: HR, 6.66, P < .005; MRDTOTAL ≥0.1%: HR, 11.52, P < .005) and OS (MRDTOTAL 0.001% to <0.1%: HR, 5.3, P < .05; MRDTOTAL ≥0.1%: HR = 9.21, P < .005). The C index and Akaike information criterion metrics demonstrated the superior performance of the NPCI compared with MRDTOTAL in predicting treatment outcome. CONCLUSIONS Progressive deepening of response, conventional as well as MRD, correlates with superior survival outcomes. The NPCI proved to be a superior determinant of survival and can be explored as a better statistic than MRD.
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Affiliation(s)
- Nupur Das
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Meetu Dahiya
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Ritu Gupta
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Lalit Kumar
- Department of Medical Oncology, Dr. B.R.A. IRCH, AIIMS, New Delhi, India
| | - Lata Rani
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Anubha Gupta
- SBI Lab, Department of ECE, Indraprastha Institute of Information Technology, New Delhi, India
| | - Akanksha Farswan
- SBI Lab, Department of ECE, Indraprastha Institute of Information Technology, New Delhi, India
| | - Atul Sharma
- Department of Medical Oncology, Dr. B.R.A. IRCH, AIIMS, New Delhi, India
| | - Om Dutt Sharma
- Laboratory Oncology Unit, Dr. B.R.A. IRCH, All India Institute of Medical Sciences (AIIMS), New Delhi, India
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Jain G, Das N, Gajendra S, Gangwar SP, Gupta R, Mallik S, Sharma A, Kumar L, Upadhyay AD. Effect of the sequence of pull of bone marrow aspirates on plasma cell quantification in plasma cell proliferative disorders. Int J Lab Hematol 2022; 44:837-845. [DOI: 10.1111/ijlh.13887] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 05/11/2022] [Indexed: 02/04/2023]
Affiliation(s)
- Garima Jain
- Department of Laboratory Oncology Dr. BRAIRCH, AIIMS New Delhi India
| | - Nupur Das
- Department of Laboratory Oncology Dr. BRAIRCH, AIIMS New Delhi India
| | - Smeeta Gajendra
- Department of Laboratory Oncology Dr. BRAIRCH, AIIMS New Delhi India
| | | | - Ritu Gupta
- Department of Laboratory Oncology Dr. BRAIRCH, AIIMS New Delhi India
| | | | - Atul Sharma
- Department of Medical Oncology Dr. BRAIRCH, AIIMS New Delhi India
| | - Lalit Kumar
- Department of Medical Oncology Dr. BRAIRCH, AIIMS New Delhi India
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Brando B. Issue Highlights-May 2022. CYTOMETRY. PART B, CLINICAL CYTOMETRY 2022; 102:185-188. [PMID: 35567410 DOI: 10.1002/cyto.b.22072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Bruno Brando
- Hematology Laboratory and Transfusion Center Western Milan Area Hospital Consortium 20025 Legnano (Milano), Italy
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