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Xie W, Lu J, Chen Y, Wang X, Lu H, Li Q, Jin N, He J, Ou L, Ni J, Shen Y, Shao L. TCL1A-expressing B cells are critical for tertiary lymphoid structure formation and the prognosis of oral squamous cell carcinoma. J Transl Med 2024; 22:477. [PMID: 38764038 DOI: 10.1186/s12967-024-05292-7] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 05/11/2024] [Indexed: 05/21/2024] Open
Abstract
BACKGROUND Oral squamous cell carcinoma (OSCC) is a malignant tumor with a poor prognosis. Traditional treatments have limited effectiveness. Regulation of the immune response represents a promising new approach for OSCC treatment. B cells are among the most abundant immune cells in OSCC. However, the role of B cells in OSCC treatment has not been fully elucidated. METHODS Single-cell RNA sequencing analysis of 13 tissues and 8 adjacent normal tissues from OSCC patients was performed to explore differences in B-cell gene expression between OSCC tissues and normal tissues. We further investigated the relationship between differentially expressed genes and the immune response to OSCC. We utilized tissue microarray data for 146 OSCC clinical samples and RNA sequencing data of 359 OSCC samples from The Cancer Genome Atlas (TCGA) to investigate the role of T-cell leukemia 1 A (TCL1A) in OSCC prognosis. Multiplex immunohistochemistry (mIHC) was employed to investigate the spatial distribution of TCL1A in OSCC tissues. We then investigated the effect of TCL1A on B-cell proliferation and trogocytosis. Finally, lentiviral transduction was performed to induce TCL1A overexpression in B lymphoblastoid cell lines (BLCLs) to verify the function of TCL1A. RESULTS Our findings revealed that TCL1A was predominantly expressed in B cells and was associated with a better prognosis in OSCC patients. Additionally, we found that TCL1A-expressing B cells are located at the periphery of lymphatic follicles and are associated with tertiary lymphoid structures (TLS) formation in OSCC. Mechanistically, upregulation of TCL1A promoted the trogocytosis of B cells on dendritic cells by mediating the upregulation of CR2, thereby improving antigen-presenting ability. Moreover, the upregulation of TCL1A expression promoted the proliferation of B cells. CONCLUSION This study revealed the role of B-cell TCL1A expression in TLS formation and its effect on OSCC prognosis. These findings highlight TCL1A as a novel target for OSCC immunotherapy.
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Affiliation(s)
- Wenqiang Xie
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, PR China
| | - Jinjin Lu
- Department of Periodontics, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, 510182, Guangdong, PR China
| | - Yichen Chen
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, PR China
| | - Xi Wang
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, 510055, PR China
| | - Huanzi Lu
- Guanghua School of Stomatology, Guangdong Provincial Key Laboratory of Stomatology, Stomatological Hospital, Sun Yat-Sen University, Guangzhou, 510055, PR China
| | - Qunxing Li
- Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, PR China
| | - Nianqiang Jin
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, PR China
| | - Jiankang He
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, PR China
| | - Lingling Ou
- Department of Periodontics, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, 510182, Guangdong, PR China
| | - Jia Ni
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, PR China
| | - Yuqin Shen
- Department of Periodontics, Guangzhou Key Laboratory of Basic and Applied Research of Oral Regenerative Medicine, Affiliated Stomatology Hospital of Guangzhou Medical University, Guangzhou, 510182, Guangdong, PR China
| | - Longquan Shao
- Stomatological Hospital, Southern Medical University, Guangzhou, 510280, PR China.
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Jamur VR, Lisboa MDO, Azambuja AP, Brofman PRS. Case report: CD8 positive T-cell Prolymphocytic Leukemia presenting complex karyotype with a rare chromosomal abnormality der(2)t(1;2)(q21;q37) and additional signals of the genes MYC, IGH, and TP53. Hematol Transfus Cell Ther 2023:S2531-1379(23)00164-5. [PMID: 37704564 DOI: 10.1016/j.htct.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 06/01/2023] [Accepted: 07/24/2023] [Indexed: 09/15/2023] Open
Affiliation(s)
- Valderez Ravaglio Jamur
- Faculdade de Medicina da Pontifícia Universidade Católica do Paraná (PUCPR), Curitiba, PR, Brazil.
| | | | - Ana Paula Azambuja
- Complexo Hospital de Clínicas, Universidade Federal do Paraná, Curitiba, PR, Brazil
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Mikhaylenko N, Wahnschaffe L, Herling M, Roeder I, Seifert M. Computational gene expression analysis reveals distinct molecular subgroups of T-cell prolymphocytic leukemia. PLoS One 2022; 17:e0274463. [PMID: 36129940 PMCID: PMC9491575 DOI: 10.1371/journal.pone.0274463] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 08/29/2022] [Indexed: 11/20/2022] Open
Abstract
T-cell prolymphocytic leukemia (T-PLL) is a rare blood cancer with poor prognosis. Overexpression of the proto-oncogene TCL1A and missense mutations of the tumor suppressor ATM are putative main drivers of T-PLL development, but so far only little is known about the existence of T-PLL gene expression subtypes. We performed an in-depth computational reanalysis of 68 gene expression profiles of one of the largest currently existing T-PLL patient cohorts. Hierarchical clustering combined with bootstrapping revealed three robust T-PLL gene expression subgroups. Additional comparative analyses revealed similarities and differences of these subgroups at the level of individual genes, signaling and metabolic pathways, and associated gene regulatory networks. Differences were mainly reflected at the transcriptomic level, whereas gene copy number profiles of the three subgroups were much more similar to each other, except for few characteristic differences like duplications of parts of the chromosomes 7, 8, 14, and 22. At the network level, most of the 41 predicted potential major regulators showed subgroup-specific expression levels that differed at least in comparison to one other subgroup. Functional annotations suggest that these regulators contribute to differences between the subgroups by altering processes like immune responses, angiogenesis, cellular respiration, cell proliferation, apoptosis, or migration. Most of these regulators are known from other cancers and several of them have been reported in relation to leukemia (e.g. AHSP, CXCL8, CXCR2, ELANE, FFAR2, G0S2, GIMAP2, IL1RN, LCN2, MBTD1, PPP1R15A). The existence of the three revealed T-PLL subgroups was further validated by a classification of T-PLL patients from two other smaller cohorts. Overall, our study contributes to an improved stratification of T-PLL and the observed subgroup-specific molecular characteristics could help to develop urgently needed targeted treatment strategies.
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Molony P, Smith AC, Selvarajah S, Sakhdari A. MDS/MPN-Unclassifiable with t(X;17)(q28;q21) and KANSL1-MTCP1/CMC4 Fusion Gene. Cytogenet Genome Res 2022; 161:564-568. [PMID: 35038703 DOI: 10.1159/000521509] [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] [Received: 05/19/2021] [Accepted: 12/12/2021] [Indexed: 11/19/2022] Open
Abstract
Myelodysplastic/myeloproliferative neoplasm, unclassifiable (MDS/MPN-U) is a poorly characterized entity among overlap myeloid syndromes. Recent studies have shown heterogeneous mutational profiles in this group being able to subclassify them into entities closely related to the more well-established disorders under the umbrella term of the MDS/MPN group. Recurrent cytogenetic alterations are, nonetheless, rare in MDS/MPN-U. Here, for the first time, we report a case of MDS/MPN-U with a t(X;17)(q28;q21) chromosomal rearrangement leading to the KANSL1-MTCP1 fusion gene.
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Affiliation(s)
- Peter Molony
- Laboratory Medicine Program, University Health Network, and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Adam C Smith
- Laboratory Medicine Program, University Health Network, and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Shamini Selvarajah
- Laboratory Medicine Program, University Health Network, and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Ali Sakhdari
- Laboratory Medicine Program, University Health Network, and Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
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Abstract
T-cell prolymphocytic leukemia (T-PLL) is a rare mature T-cell hematologic neoplasm with a very poor prognosis and limited treatment options to date. Single-agent alemtuzumab remains the first line of therapy for the treatment-naive and relapsed/refractory patients. Prospective clinical trials are difficult to conduct given that these patients have a short life expectancy after the initial diagnosis. As a result, researchers are implementing the use of targeted therapies in vitro and ex vivo followed by in vivo trials on a small subset of patients which are reviewed here. Newer approaches in the treatment of T-PLL are developing based on recognizing the cytogenetic phenotype of each patient and targeting the identified defective genes that are usually involved in the cell cycle regulation such as protooncogenes, tumor suppressors, and deoxyribonucleic acid (DNA) repair genes. These could potentially redirect the management in the near future and improve the overall survival (OS) and the progression-free survival (PFS) for these patients.
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Affiliation(s)
| | | | - Amandeep Aujla
- Medical Oncology and Hematology, Hartford Healthcare - Backus Hospital, Norwich, USA
| | | | - Sachin Gupta
- Hospital Medicine, Tower Health Reading Hospital, West Reading, USA
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