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Skhoun H, El Fessikh M, El Alaoui Al Abdallaoui M, Khattab M, Belkhayat A, Chebihi ZT, Hassani A, Abilkassem R, Agadr A, Dakka N, El Baghdadi J. Cytogenetic abnormalities and TP53 and RAS gene profiles of childhood acute lymphoblastic leukemia in Morocco. Arch Pediatr 2024; 31:238-244. [PMID: 38679547 DOI: 10.1016/j.arcped.2023.11.003] [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] [Received: 06/07/2023] [Revised: 11/24/2023] [Accepted: 11/26/2023] [Indexed: 05/01/2024]
Abstract
BACKGROUND Recurrent genetic abnormalities affecting pivotal signaling pathways are the hallmark of childhood acute lymphoblastic leukemia (ALL). The identification of these aberrations remains clinically important. Therefore, we sought to determine the cytogenetic profile and the mutational status of TP53 and RAS genes among Moroccan childhood cases of ALL. METHODS In total, 35 patients with childhood ALL were enrolled in the study. The diagnosis and treatment were established in the Pediatric Hematology and Oncology Center at the Children's Hospital of Rabat. Chromosome banding analysis and fluorescence in situ hybridization were used to detect genetic aberrations. Blood samples were screened for TP53 and RAS mutations using Sanger sequencing. RESULTS Of the 35 cases, 30 were B-lineage ALL (85.7 %). Moreover, a male predominance was observed. Cytogenetic analysis revealed chromosomal anomalies in 27 cases (77.1 %). The most frequent aberrations were high hyperdiploidy and BCR/ABL rearrangement. Interestingly, we found the rare t(15;16) and the t(8;14), which are uncommon translocations in pediatric B-ALL. The mutational analysis revealed Pro72Arg (rs1042522:C > G) and Arg213Arg (rs1800372:A > G) in TP53. In correlation with cytogenetic data, rs1042522:C > G showed a significant association with the occurrence of chromosomal translocations (p = 0.04). However, no variant was detected in NRAS and KRAS genes. CONCLUSION Our findings emphasize the significance of detecting chromosomal abnormalities as relevant prognostic markers. We also suggest a low occurrence of genetic variants among Moroccan children with ALL.
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Affiliation(s)
- Hanaa Skhoun
- Genetics Unit, Military Hospital Mohammed V, Rabat, Morocco
| | | | | | - Mohammed Khattab
- Pediatric Hematology and Oncology Center, Children's Hospital, Rabat, Morocco; Department of Pediatrics, Abulcasis International University of Health Sciences, Rabat, Morocco; Centre of Childhood Care and Prevention, Cheikh Zaid International University Hospital, Rabat, Morocco
| | | | | | - Amale Hassani
- Department of Pediatrics, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco
| | - Rachid Abilkassem
- Department of Pediatrics, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco
| | - Aomar Agadr
- Department of Pediatrics, Military Hospital Mohammed V, Faculty of Medicine and Pharmacy, University Mohammed V, Rabat, Morocco
| | - Nadia Dakka
- Laboratory of Human Pathologies Biology and Genomic Center of Human Pathologies, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Morocco
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Skhoun H, Khattab M, Belkhayat A, Takki Chebihi Z, Dakka N, El Baghdadi J. A prognostic approach on a case of pediatric Philadelphia chromosome-positive acute lymphoblastic leukemia with monosomy-7. Clin Case Rep 2021; 9:e05207. [PMID: 34963805 PMCID: PMC8710846 DOI: 10.1002/ccr3.5207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/04/2021] [Accepted: 11/14/2021] [Indexed: 11/21/2022] Open
Abstract
In this work, we present the first case of a Ph-positive ALL Moroccan girl with t(9;22)(q34;q11) and monosomy-7. She was diagnosed with Ph-positive ALL based on bone marrow examination, immunophenotyping, and cytogenetic analysis. She relapsed after treatment with the persistence of the Ph chromosome and the appearance of a monosomy-7.
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Affiliation(s)
- Hanaa Skhoun
- Genetics UnitMilitary Hospital Mohammed VRabatMorocco
- Laboratory of Human Pathologies BiologyGenomic Center of Human PathologiesFaculty of SciencesMohammed V University in RabatRabatMorocco
| | - Mohammed Khattab
- Department of Pediatric Hemato‐OncologyChildren's Hospital of RabatRabatMorocco
| | | | | | - Nadia Dakka
- Laboratory of Human Pathologies BiologyGenomic Center of Human PathologiesFaculty of SciencesMohammed V University in RabatRabatMorocco
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Wang H, Zhu N, Ye X, Wang L, Wang B, Shan W, Lai X, Tan Y, Fu S, Xiao H, Huang H. PTPN21-CDS long isoform inhibits the response of acute lymphoblastic leukemia cells to NK-mediated lysis via the KIR/HLA-I axis. J Cell Biochem 2020; 121:3298-3312. [PMID: 31898344 DOI: 10.1002/jcb.29601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 12/11/2019] [Indexed: 12/11/2022]
Abstract
Protein tyrosine phosphatase non-receptor type 21 (PTPN21) is a member of the non-receptor tyrosine phosphatase family. We have found that PTPN21 is mutated in relapsed Philadelphia chromosome-negative acute lymphoblastic leukemia (ALL) after allogeneic hematopoietic stem cell transplantation. PTPN21 consists of three types of isoforms according to the length of the protein encoded. However, the roles of different isoforms in leukemic cells have not been elucidated. In the study, PTPN21 isoform constitution in five ALL cell lines were identified by transcriptome polymerase chain reaction combined with Sanger sequencing, and the relationship between PTPN21 isoforms and sensitivity to natural killer (NK) cells mediated killing in ALL cell lines were further assessed by knock-out of different isoforms of PTPN21 using CRISPR-Cas9 technique. Subsequently, we explored the functional mechanisms through RNA sequencing and confirmatory testing. The results showed that there was no significant change when all PTPN21 isoforms were knocked out in ALL cells, but the sensitivity of NALM6 cells with PTPN21-CDSlong knock-out (NALM6-PTPN21lk ) to NK-mediated killing was significantly increased. Whole transcriptome sequencing and further validation testing showed that human leukocyte antigen class I (HLA-I) molecules were significantly decreased, accompanied by a significantly downregulated expression of antigen presenting-related chaperones in NALM6-PTPN21lk cells. Our results uncovered a previously unknown mechanism that PTPN21-CDSlong and CDSshort isoforms may play opposite roles in NK-mediated killing in ALL cells, and showed that the endogenous PTPN21-CDSlong isoform inhibited ALL cells to NK cell-mediated lysis by regulating the KIR-HLA-I axis.
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Affiliation(s)
- Huafang Wang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China.,Zhejiang Engineering Laboratory for Stem cell and Immunotherapy, Hangzhou, Zhejiang, China
| | - Ni Zhu
- Department of Hematology, The First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Xiaohang Ye
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Limengmeng Wang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China.,Zhejiang Engineering Laboratory for Stem cell and Immunotherapy, Hangzhou, Zhejiang, China
| | - Binsheng Wang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China.,Zhejiang Engineering Laboratory for Stem cell and Immunotherapy, Hangzhou, Zhejiang, China
| | - Wei Shan
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China.,Zhejiang Engineering Laboratory for Stem cell and Immunotherapy, Hangzhou, Zhejiang, China
| | - Xiaoyu Lai
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yamin Tan
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Shan Fu
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Haowen Xiao
- Department of Hematology, The Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China
| | - He Huang
- Bone Marrow Transplantation Center, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Institute of Hematology, Zhejiang University, Hangzhou, Zhejiang, China.,Zhejiang Engineering Laboratory for Stem cell and Immunotherapy, Hangzhou, Zhejiang, China
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