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Uno N, Kaku N, Morinaga Y, Hasegawa H, Yanagihara K. Flow cytometry assay for the detection of single-copy DNA in human lymphocytes. Nucleic Acids Res 2020; 48:e86. [PMID: 32544240 PMCID: PMC7470942 DOI: 10.1093/nar/gkaa515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/09/2020] [Accepted: 06/05/2020] [Indexed: 11/23/2022] Open
Abstract
Specific nucleic acid sequences can be detected in individual cells by in situ hybridization. However, when very few copies of a target sequence are present per cell, its signal is undetectable by flow cytometry. Although various approaches have been developed to increase fluorescence signals for in situ hybridization, flow cytometric detection of specific genomic DNA sequences has not been established. Here, we present a flow cytometry assay for detection of single-copy genomic sequences in human lymphocytes using in situ PCR with universal energy transfer-labelled primers.
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Affiliation(s)
- Naoki Uno
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Norihito Kaku
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Yoshitomo Morinaga
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Hiroo Hasegawa
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
| | - Katsunori Yanagihara
- Department of Laboratory Medicine, Nagasaki University Graduate School of Biomedical Sciences. Nagasaki 852-8501, Japan
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Expansión clónica y caracterización genómica del proceso de integración del virus linfotrópico humano tipo I en la leucemia/linfoma de células T en adultos. BIOMEDICA 2009. [DOI: 10.7705/biomedica.v29i2.24] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Fujino Y, Ohno K, Tsujimoto H. Molecular pathogenesis of feline leukemia virus-induced malignancies: Insertional mutagenesis. Vet Immunol Immunopathol 2008; 123:138-43. [DOI: 10.1016/j.vetimm.2008.01.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ozawa T, Itoyama T, Sadamori N, Yamada Y, Hata T, Tomonaga M, Isobe M. Rapid isolation of viral integration site reveals frequent integration of HTLV-1 into expressed loci. J Hum Genet 2004; 49:154-165. [PMID: 14991527 DOI: 10.1007/s10038-004-0126-7] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2003] [Accepted: 12/26/2003] [Indexed: 12/31/2022]
Abstract
Although there is tight association of the human T-cell leukemia virus type-1 (HTLV-1) with adult T-cell leukemia/lymphoma (ATLL), it has remained unresolved whether the HTLV-1 integration into the host genome has any role in the development of this disease. We isolated a total of 58 HTLV-1 integration sites using newly developed, adaptor-ligated PCR from 33 ATLL patients and five ATLL cell lines. We compared our data as well as the previously reported ones with the complete human genomic sequence for the location of its placement, structure, and expression of genes nearby the integration site. The chromosomal target for integration was selected at random, but the integration favorably occurred within the transcription units; more than 59.5% of total integration was observed within the transcriptional unit. All inserted genes by HTLV-1 integration were expressed in normal T cells. Upregulation of genes due to viral integration was found in two out of nine ATLL cases; about 4.4- and 102-fold elevated ankyrin-1 ( ANK-1) and gephyrin ( GPHN) gene expressions were observed, respectively. These data suggest that the preferential integration of HTLV-1 into an expressed locus occasionally causes deregulation of corresponding gene, which may lead to leukemogenesis of a fraction of ATLL.
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Affiliation(s)
- Tatsuhiko Ozawa
- Laboratory of Molecular and Cellular Biology, Department of Materials and Biosystem Engineering, Faculty of Engineering, Toyama University, 3190 Gofuku, Toyama 930-8555, Japan
| | - Takahiro Itoyama
- Laboratory of Molecular and Cellular Biology, Department of Materials and Biosystem Engineering, Faculty of Engineering, Toyama University, 3190 Gofuku, Toyama 930-8555, Japan
| | - Naoki Sadamori
- Department of Nursing, Siebold University of Nagasaki, Nagasaki 851-2195, Japan
| | - Yasuaki Yamada
- Division of Laboratory Medicine, Department of Translational Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki 852-8501, Japan
| | - Tomoko Hata
- Department of Hematology, Molecular Medicine Unit, Atomic Bomb Disease Institute, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Masao Tomonaga
- Department of Hematology, Molecular Medicine Unit, Atomic Bomb Disease Institute, Nagasaki University Graduate School of Biomedical Sciences, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Masaharu Isobe
- Laboratory of Molecular and Cellular Biology, Department of Materials and Biosystem Engineering, Faculty of Engineering, Toyama University, 3190 Gofuku, Toyama 930-8555, Japan.
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