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Ezawa M, Kouno F, Kubo H, Sakuma T, Yamamoto T, Kinoshita T. Pou5f3.3 is involved in establishment and maintenance of hematopoietic cells during Xenopus development. Tissue Cell 2021; 72:101531. [PMID: 33798831 DOI: 10.1016/j.tice.2021.101531] [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: 12/23/2020] [Revised: 03/05/2021] [Accepted: 03/15/2021] [Indexed: 11/30/2022]
Abstract
Three POU family class V gene homologues are expressed in the development of Xenopus. In contrast to the expression of Pou5f3.1 and Pou5f3.2 in organogenesis, Pou5f3.3 is expressed during oogenesis in ovary. We investigated the expression and function of Pou5f3.3 in organogenesis of Xenopus laevis. RT-PCR and immunohistochemical analysis indicated that Pou5f3.3 was expressed in a small number of adult liver cells and blood cells. Immunocytochemical investigation proved that Bmi1, a marker for hematopoietic progenitor cells, was co-expressed in Pou5f3.3-expressing small spherical cells in the peripheral blood. In anemic induction by intraperitoneal injection of phenyl hydrazine, the number of Pou5f3.3-expressing cells significantly increased within 3 days after phenyl hydrazine injection. In CRISPR/Cas mutagenesis of Pou5f3.3, Bmi1-positive hematopoietic progenitor cell count decreased in the hematopoietic dorsal-lateral plate (DLP) region, resulting in a considerable reduction in peripheral blood cells. CRISPR/Cas-induced hematopoietic deficiency was completely rescued by Pou5f3.3 supplementation, but not by Pou5f3.1 or Pou5f3.2. Transplantation experiments using the H2B-GFP transgenic line demonstrated that DLP-derived Pou5f3.3-positive and Bmi1-positive cells were translocated into the liver and bone through the bloodstream. These results suggest that Pou5f3.3 plays an essential role in the establishment and maintenance of hematopoietic progenitor cells during Xenopus development.
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Affiliation(s)
- Minami Ezawa
- Department of Life Science, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
| | - Fumika Kouno
- Department of Life Science, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan
| | - Hideo Kubo
- Department of Membrane Biochemistry, Tokyo Metropolitan Institute of Medical Science, Kamikitazawa, Setagaya-ku, Tokyo, 156-8506, Japan
| | - Tetsushi Sakuma
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Takashi Yamamoto
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima, 739-8526, Japan
| | - Tsutomu Kinoshita
- Department of Life Science, Faculty of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo, 171-8501, Japan.
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Cao Y. Regulation of germ layer formation by pluripotency factors during embryogenesis. Cell Biosci 2013; 3:15. [PMID: 23497659 PMCID: PMC3602094 DOI: 10.1186/2045-3701-3-15] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2012] [Accepted: 12/26/2012] [Indexed: 01/07/2023] Open
Abstract
The classical pluripotency factors Oct4, Klf4, Sox2, and Nanog are required for the maintenance of pluripotency and self-renewal of embryonic stem (ES) cells and can reprogram terminally differentiated cells into a pluripotent state. Alteration in the levels of these factors in ES cells will cause differentiation into different lineages, suggesting that they are critical determinants of cell fates. These factors show dynamic expression patterns during embryogenesis, in particular in the pluripotent or multipotent cells of an early stage embryo, implying that they are involved in the cell fate decision during early embryonic development. Functions and the underlying molecular mechanisms have been extensively studied for these factors in ES cells under cultured conditions. However, this does not mean that the results also hold true for intact embryos. In the review, I have summarized and discussed the findings on the functions and the underlying mechanisms of the classical pluripotency factors during early embryogenesis, in particular during germ layer formation.
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Affiliation(s)
- Ying Cao
- Model Animal Research Center of Nanjing University and MOE Key Laboratory of Model Animals for Disease Study, 12 Xuefu Road, Pukou High-Tech Zone, Nanjing, 210061, China.
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Pou2, a class V POU-type transcription factor in zebrafish, regulates dorsoventral patterning and convergent extension movement at different blastula stages. Mech Dev 2012; 129:219-35. [DOI: 10.1016/j.mod.2012.07.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 07/30/2012] [Accepted: 07/31/2012] [Indexed: 01/30/2023]
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Khan A, Nakamoto A, Tai M, Saito S, Nakayama Y, Kawamura A, Takeda H, Yamasu K. Mesendoderm specification depends on the function of Pou2, the class V POU-type transcription factor, during zebrafish embryogenesis. Dev Growth Differ 2012; 54:686-701. [DOI: 10.1111/j.1440-169x.2012.01369.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Revised: 07/12/2012] [Accepted: 07/12/2012] [Indexed: 11/28/2022]
Affiliation(s)
- Alam Khan
- Division of Life Science; Graduate School of Science and Engineering, Saitama University; Shimo-Okubo, Sakura-ku; Saitama City; Saitama; 338-8570; Japan
| | - Andrew Nakamoto
- Division of Life Science; Graduate School of Science and Engineering, Saitama University; Shimo-Okubo, Sakura-ku; Saitama City; Saitama; 338-8570; Japan
| | - Miyako Tai
- Division of Life Science; Graduate School of Science and Engineering, Saitama University; Shimo-Okubo, Sakura-ku; Saitama City; Saitama; 338-8570; Japan
| | - Shinji Saito
- Division of Life Science; Graduate School of Science and Engineering, Saitama University; Shimo-Okubo, Sakura-ku; Saitama City; Saitama; 338-8570; Japan
| | - Yukiko Nakayama
- Division of Life Science; Graduate School of Science and Engineering, Saitama University; Shimo-Okubo, Sakura-ku; Saitama City; Saitama; 338-8570; Japan
| | - Akinori Kawamura
- Division of Life Science; Graduate School of Science and Engineering, Saitama University; Shimo-Okubo, Sakura-ku; Saitama City; Saitama; 338-8570; Japan
| | - Hiroyuki Takeda
- Department of Biological Sciences; Graduate School of Science, University of Tokyo; Hongo; Bunkyo-ku; Tokyo; 113-0033; Japan
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Martin LK, Mezentseva NV, Bratoeva M, Ramsdell AF, Eisenberg CA, Eisenberg LM. Canonical WNT signaling enhances stem cell expression in the developing heart without a corresponding inhibition of cardiogenic differentiation. Stem Cells Dev 2011; 20:1973-83. [PMID: 21351874 DOI: 10.1089/scd.2010.0490] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
WNT signaling has been shown to influence the development of the heart. Although recent data suggested that canonical WNTs promote the emergence and expansion of cardiac progenitors in the pregastrula embryo, it has long been accepted that once gastrulation begins, canonical WNT signaling needs to be suppressed for cardiac development to proceed. Yet, this latter supposition appears to be odds with the expression of multiple canonical WNTs in the developing heart. The present study examining the effect of ectopic canonical WNT signaling on cardiogenesis in the developing frog was designed to test the hypothesis that heart formation is dependent on the inhibition of canonical WNT activity at the onset of gastrulation. Here we report that cardiac differentiation of explanted precardiac tissue from the dorsal marginal zone was not suppressed by exposure to WNT1 protein, although expression of Tbx5, Tbx20, and Nkx2.5 was selectively reduced. Pharmacological activation of WNT signaling in intact embryos using the GSK3 inhibitor SB415286 did not prevent the formation of an anatomically normal and functionally sound heart, with the only defect observed being lower levels of the cardiac transcription factor Nkx2.5. In both the explant and whole embryo studies, expression of muscle genes and proteins was unaffected by ectopic canonical WNT signaling. In contrast, canonical Wnt signaling upregulated expression of the cardiac stem cell marker c-kit and pluripotency genes Oct25 and Oct60. However, this regulatory stimulation of stem cells did not come at the expense of blocking cardiac progenitors from differentiating.
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Affiliation(s)
- Lisa K Martin
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, South Carolina, USA
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