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Arakawa T, Yoshimi T, Azuma M, Tachibana T. Production of a monoclonal antibody specific for Pou5f1/Oct4. Monoclon Antib Immunodiagn Immunother 2014; 32:229-31. [PMID: 23750483 DOI: 10.1089/mab.2013.0004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Pou5f1/Oct4, a member of the POU transcription factor family, is exclusively expressed in embryonic stem cells, which are involved in self-renewal and maintaining pluripotency. In the present study, we report on the establishment of a monoclonal antibody that is specific for Oct4 using the rat medial iliac lymph node method. In an immunoblotting analysis, our antibody detected endogenous Oct4. In addition, immunocytochemical staining using the antibody revealed the nuclear localization of Oct4. This monoclonal antibody has the potential for use in the further analysis of Oct4 function in stem cells.
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Affiliation(s)
- Tatsuhiko Arakawa
- Department of Bioengineering, Graduate School of Engineering, Osaka City University, Osaka, Japan
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Harada A, Okada S, Konno D, Odawara J, Yoshimi T, Yoshimura S, Kumamaru H, Saiwai H, Tsubota T, Kurumizaka H, Akashi K, Tachibana T, Imbalzano AN, Ohkawa Y. Chd2 interacts with H3.3 to determine myogenic cell fate. EMBO J 2012; 31:2994-3007. [PMID: 22569126 DOI: 10.1038/emboj.2012.136] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Accepted: 04/18/2012] [Indexed: 11/09/2022] Open
Abstract
Cell differentiation is mediated by lineage-determining transcription factors. We show that chromodomain helicase DNA-binding domain 2 (Chd2), a SNF2 chromatin remodelling enzyme family member, interacts with MyoD and myogenic gene regulatory sequences to specifically mark these loci via deposition of the histone variant H3.3 prior to cell differentiation. Directed and genome-wide analysis of endogenous H3.3 incorporation demonstrates that knockdown of Chd2 prevents H3.3 deposition at differentiation-dependent, but not housekeeping, genes and inhibits myogenic gene activation. The data indicate that MyoD determines cell fate and facilitates differentiation-dependent gene expression through Chd2-dependent deposition of H3.3 at myogenic loci prior to differentiation.
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Affiliation(s)
- Akihito Harada
- Department of Advanced Medical Initiatives, JST-CREST, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Shiota M, Saiwai H, Mun S, Harada A, Okada S, Odawara J, Tanaka M, Iwao H, Ohkawa Y. Generation of a Rat Monoclonal Antibody Specific for Heat Shock Cognate Protein 70. Hybridoma (Larchmt) 2010; 29:453-6. [DOI: 10.1089/hyb.2010.0024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masayuki Shiota
- Department of Pharmacology, Osaka City University Medical School, Osaka, Japan
| | - Hirokazu Saiwai
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Saya Mun
- Department of Pharmacology, Osaka City University Medical School, Osaka, Japan
| | - Akihito Harada
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Seiji Okada
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Jun Odawara
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Masako Tanaka
- Department of Pharmacology, Osaka City University Medical School, Osaka, Japan
| | - Hiroshi Iwao
- Department of Pharmacology, Osaka City University Medical School, Osaka, Japan
| | - Yasuyuki Ohkawa
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Harada A, Ohkawa Y, Ao S, Odawara J, Okada S, Azuma M, Nishiyama Y, Nakamura M, Tachibana T. Rat monoclonal antibody specific for MyoD. Hybridoma (Larchmt) 2010; 29:255-8. [PMID: 20569002 DOI: 10.1089/hyb.2009.0117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Myogenic determination 1 (MyoD) is a myogenic regulatory factor (MRF) possessing a basic domain and a helix-loop-helix domain. MRFs play a critical role in myoblast fate and terminal differentiation. MyoD is a transcriptional factor that induces transcription by binding with gene regulatory factors expressed in skeletal muscle. As a master gene, MyoD also determines skeletal muscle differentiation. In this study, we established a monoclonal antibody specific for MyoD using the rat medial iliac lymph node method. Immunoblot analysis revealed that our monoclonal antibody against MyoD could identify full-length MyoD. Moreover, immunocytochemical staining revealed a change in the expression of MyoD at the skeletal muscle differentiation stage. This monoclonal antibody against MyoD allows for further studies to elucidate the mechanism by which MyoD influences skeletal muscle differentiation.
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Affiliation(s)
- Akihito Harada
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Harada A, Yoshimura S, Odawara J, Azuma M, Okada S, Nakamura M, Tachibana T, Ohkawa Y. Generation of a rat monoclonal antibody specific for CHD2. Hybridoma (Larchmt) 2010; 29:173-7. [PMID: 20443711 DOI: 10.1089/hyb.2009.0090] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
CHD2 is a member of the CHD family that contains chromodomain, helicase domain as well as DNA-binding domain. The CHD family is involved in gene expression and transcription by ATP-dependent chromatin remodeling. Analysis of mutant mouse revealed that CHD2 is involved in development as well as hematopoiesis, which suggests the involvement of CHD2 in gene expression. However, CHD2 has not yet been analyzed biochemically as there is no specific antibody against it. Here, we report on the establishment of specific monoclonal antibody (MAb) against CHD2 utilizing a rat medial iliac lymph node method. Through cell immunostaining utilizing established MAb to CHD2, we confirmed that CHD2 was localized in euchromatin. Additionally, IP-Western revealed that the expression level of full-length CHD2 did not change during the differentiation stage. Additionally, a specific signal was confirmed around 95 kDa at the undifferentiated stage. This clearly indicated that CHD2 was involved in specific gene expression at this stage. Thus, this antibody can contribute to elucidating the function of CHD2 in cell expression.
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Affiliation(s)
- Akihito Harada
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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Harada A, Okada S, Odawara J, Kumamaru H, Saiwai H, Aoki M, Nakamura M, Nishiyama Y, Ohkawa Y. Production of a rat monoclonal antibody specific for Myf5. Hybridoma (Larchmt) 2010; 29:59-62. [PMID: 20199153 DOI: 10.1089/hyb.2009.0066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Myogenic regulatory factors (MRFs) are transcription factors that possess a characteristic basic helix-loop-helix domain. Myf5, MyoD, MRF4, and myogenin are well-known MRF family members that activate muscle-specific genes during differentiation. Myf5 is expressed first among MRFs at the very early phase and plays an important role in myoblast specificity and cell proliferation. Myf5 shares high homology with MyoD, and therefore some commercial Myf5 antibodies are cross-reactive for Myf5 and MyoD. To allow for detailed studies of the function of Myf5, we generated a monoclonal antibody specific for Myf5 utilizing a rat medial iliac lymph node method. Immunoblot analysis using our monoclonal antibody enabled us to identify Myf5 protein from rat myoblast L6E9 cell extract. Moreover, cell immunostaining revealed the nuclear localization of Myf5 in the L6E9 cells. This monoclonal antibody against Myf5 will allow us to perform further detailed studies of Myf5 and Myf5 function.
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Affiliation(s)
- Akihito Harada
- SSP Stem Cell Unit, Faculty of Medicine, Kyushu University , Fukuoka, Japan
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Kotani M, Harada A, Odawara J, Azuma M, Okada S, Nishiyama Y, Nakamura M, Tachibana T, Ohkawa Y. Monoclonal Antibody Specific for Dhx9/NDHII/RHA. Hybridoma (Larchmt) 2010; 29:259-61. [DOI: 10.1089/hyb.2009.0107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Manato Kotani
- Department of Bioengineering, Graduate School of Engineering, Osaka City University, Osaka, Japan
| | - Akihito Harada
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Jun Odawara
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Masayuki Azuma
- Department of Bioengineering, Graduate School of Engineering, Osaka City University, Osaka, Japan
| | - Seiji Okada
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Yuko Nishiyama
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Mako Nakamura
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
| | - Taro Tachibana
- Department of Bioengineering, Graduate School of Engineering, Osaka City University, Osaka, Japan
| | - Yasuyuki Ohkawa
- Department of Epigenetics, SSP Stem Cell Unit, Faculty of Medicine, Kyushu University, Fukuoka, Japan
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