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Ariga Y, Low S, Hoshino H, Nakada T, Akama TO, Muramoto A, Fukushima M, Yamauchi T, Ohshima Y, Kobayashi M. Expression and Clinical Significance of Spi-B in B-cell Acute Lymphoblastic Leukemia. J Histochem Cytochem 2022; 70:683-694. [PMID: 36169277 PMCID: PMC9660366 DOI: 10.1369/00221554221130383] [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: 07/06/2022] [Accepted: 09/13/2022] [Indexed: 11/22/2022] Open
Abstract
Spi-B, a member of the E26 transformation-specific (ETS) family of transcription factors, plays an important role in B cell differentiation. Spi-B also functions in development of diffuse large B-cell lymphoma; thus, we hypothesized that it may participate in leukemogenesis of B-cell acute lymphoblastic leukemia (B-ALL). To test this hypothesis, we first generated an anti-Spi-B monoclonal antibody that recognized Spi-B on formalin-fixed, paraffin-embedded tissue sections. This antibody, designated S28-5, selectively stained B cell nuclei at the pre-plasma cell stage (including centrocytes and centroblasts in germinal centers) and nuclei of plasmacytoid dendritic cells, but not fully differentiated plasma cells, T cells, macrophages, or follicular dendritic cells. Employing S28-5, we then performed immunohistochemical staining of bone marrow aspiration biopsy specimens obtained from B-ALL patients (n=62). Cases that showed stronger nuclear S28-5 signals than T-cell ALL were scored positive. In 26 (42%) of 62 specimens, leukemic cells showed nuclear Spi-B expression, and positivity was associated with patient age at diagnosis, and serum uric acid and creatinine levels. Moreover, Spi-B-positive patients demonstrated significantly shorter overall survival than did Spi-B-negative patients. These results suggest that Spi-B expression may serve as a prognostic indicator of B-ALL.
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Affiliation(s)
- Yuzuru Ariga
- Department of Tumor Pathology, Faculty of
Medical Sciences, University of Fukui, Eiheiji, Japan
- Department of Pediatrics, Faculty of Medical
Sciences, University of Fukui, Eiheiji, Japan
| | - Shulin Low
- Department of Tumor Pathology, Faculty of
Medical Sciences, University of Fukui, Eiheiji, Japan
| | - Hitomi Hoshino
- Department of Tumor Pathology, Faculty of
Medical Sciences, University of Fukui, Eiheiji, Japan
| | - Tsutomu Nakada
- Department of Instrumental Analysis, Research
Center for Advanced Science and Technology, Shinshu University, Matsumoto,
Japan
| | - Tomoya O. Akama
- Department of Pharmacology, Kansai Medical
University, Hirakata, Japan
| | - Akifumi Muramoto
- Department of Tumor Pathology, Faculty of
Medical Sciences, University of Fukui, Eiheiji, Japan
| | - Mana Fukushima
- Department of Tumor Pathology, Faculty of
Medical Sciences, University of Fukui, Eiheiji, Japan
| | - Takahiro Yamauchi
- Department of Hematology and Oncology, Faculty
of Medical Sciences, University of Fukui, Eiheiji, Japan
| | - Yusei Ohshima
- Department of Pediatrics, Faculty of Medical
Sciences, University of Fukui, Eiheiji, Japan
| | - Motohiro Kobayashi
- Department of Tumor Pathology, Faculty of
Medical Sciences, University of Fukui, Eiheiji, Japan
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