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Dai Q, Liu X, Yang H, Guo S, Wang Y, Peng L, Ye L, Chen L, Lai C, Chen Q, Zhang G, Jiang Y. No prognostic significance of immunophenotypic changes at the end of remission induction therapy in children with B-lineage acute lymphoblastic leukemia. Leuk Res 2018; 68:57-61. [PMID: 29544133 DOI: 10.1016/j.leukres.2018.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 02/25/2018] [Accepted: 03/01/2018] [Indexed: 02/06/2023]
Abstract
Detection of aberrant antigen expression in acute lymphoblastic leukemia (ALL) by flow cytometric is proposed for the quantification of minimal residual disease (MRD). There are few studies that investigate the stability of the antigen expression in children with B lineage ALL at the end of remission induction therapy and determine its prognostic impact. Between 2010 and 2015, 691 bone marrow specimens of childhood ALL were sent at diagnosis for immunophenotypic characterization, and follow-up samples for MRD were analyzed on day 33. Of these, 155 patients with MRD more than or equal to 0.01% were eligible for the study. Immunophenotypic studies were performed by multiparametric flow cytometry using four-colour monoclonal antibody combinations. Overall, 86 of 155 (55.5%) cases showed phenotype shifts at least one marker. CD19 was the most stable markers. By contrast, CD20 was significantly different between diagnosis and day 33 in nearly one third of the cases. Shifts of antigen expression was not significantly associated with EFS, RFS or OS (P > 0.05). Multivariate analysis showed that WBC and BCR-ABL have independent prognostic value in childhood ALL. Changes in antigen expressions were commonly occurred at the end of induction and not associated with prognostic value in patients whose MRD were positive on day 33.
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Affiliation(s)
- Qingkai Dai
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Xiaojuan Liu
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Hui Yang
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Siqi Guo
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Yuefang Wang
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Luyun Peng
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Lei Ye
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Lan Chen
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Chunqi Lai
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Qi Chen
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China
| | - Ge Zhang
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China.
| | - Yongmei Jiang
- Department of Laboratory Medicine, West China Second University Hospital, Sichuan University, No. 20, Section 3, Ren Min Nan Lu, 610041, Chengdu, Sichuan, China; Key Laboratory of Obstetric & Gynecologic and Pediatric Disease and Birth Defects of Ministry of Education, China.
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Novelli M, Fava P, Sarda C, Ponti R, Osella-Abate S, Savoia P, Bergallo M, Lisa F, Fierro MT, Quaglino P. Blood flow cytometry in Sézary syndrome: new insights on prognostic relevance and immunophenotypic changes during follow-up. Am J Clin Pathol 2015; 143:57-69. [PMID: 25511143 DOI: 10.1309/ajcp1na3ychcdeig] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 10/24/2022] Open
Abstract
OBJECTIVES Sézary syndrome (SS) is characterized by erythroderma, generalized lymphadenopathy, and the presence of circulating atypical lymphocytes, which are difficult to identify by morphologic data. METHODS We revised our series of 107 patients in an attempt to better define the phenotypic aberrancies in blood at diagnosis and the immunophenotypic stability over time detected by flow cytometry. Polymerase chain reaction assay was also used to study CD26/dipeptidyl peptidase IV (DPPIV) gene methylation. RESULTS The most common aberrancies were represented by the lack of CD26 (96/107) or CD38 (101/107) expression and the presence of a "dim" CD3, CD4, or CD2 population. There was a high variability in CD7 expression. In total, 31% of the patients had phenotypical heterogeneity in CD26 and CD7 expression at diagnosis. The phenotype was stable over time in 73 of 95 patients with available follow-up data, while 22 of 95 patients developed changes in CD26, CD7, or CD2 expression. CD4+CD26- SS showed hypermethylation of the CpG islands for the promoter region of CD26/DPPIV. Multivariate analysis showed that CD26 expression is a favorable prognostic factor (hazard ratio, 2.94; P = .045). CONCLUSIONS We confirm the relevance of CD26 negativity in SS diagnosis and monitoring. Nevertheless, the presence of rare CD26+ cases suggests that a multiparameter flow cytometry approach should be used. Changes in methylation profile could account for phenotypical heterogeneity.
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Affiliation(s)
- Mauro Novelli
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | - Paolo Fava
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | - Cristina Sarda
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | - Renata Ponti
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | - Simona Osella-Abate
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | - Paola Savoia
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | | | - Francesco Lisa
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | - Maria Teresa Fierro
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
| | - Pietro Quaglino
- Dermatologic Clinic, Department of Medical Sciences, University of Torino, Torino, Italy
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