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Dehghanian F, Bovio PP, Gather F, Probst S, Naghsh-Nilchi A, Vogel T. ZFP982 confers mouse embryonic stem cell characteristics by regulating expression of Nanog, Zfp42, and Dppa3. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2024; 1871:119686. [PMID: 38342310 DOI: 10.1016/j.bbamcr.2024.119686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 01/27/2024] [Accepted: 02/01/2024] [Indexed: 02/13/2024]
Abstract
BACKGROUND Understanding the genetic underpinnings of protein networks conferring stemness is of broad interest for basic and translational research. METHODS We used multi-omics analyses to identify and characterize stemness genes, and focused on the zinc finger protein 982 (Zfp982) that regulates stemness through the expression of Nanog, Zfp42, and Dppa3 in mouse embryonic stem cells (mESC). RESULTS Zfp982 was expressed in stem cells, and bound to chromatin through a GCAGAGKC motif, for example near the stemness genes Nanog, Zfp42, and Dppa3. Nanog and Zfp42 were direct targets of ZFP982 that decreased in expression upon knockdown and increased upon overexpression of Zfp982. We show that ZFP982 expression strongly correlated with stem cell characteristics, both on the transcriptional and morphological levels. Zfp982 expression decreased with progressive differentiation into ecto-, endo- and mesodermal cell lineages, and knockdown of Zfp982 correlated with morphological and transcriptional features of differentiated cells. Zfp982 showed transcriptional overlap with members of the Hippo signaling pathway, one of which was Yap1, the major co-activator of Hippo signaling. Despite the observation that ZFP982 and YAP1 interacted and localized predominantly to the cytoplasm upon differentiation, the localization of YAP1 was not influenced by ZFP982 localization. CONCLUSIONS Together, our study identified ZFP982 as a transcriptional regulator of early stemness genes, and since ZFP982 is under the control of the Hippo pathway, underscored the importance of the context-dependent Hippo signals for stem cell characteristics.
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Affiliation(s)
- Fariba Dehghanian
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, HezarJarib Street, Isfahan 81746-73441, Iran; Department of Molecular Embryology, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany.
| | - Patrick Piero Bovio
- Department of Molecular Embryology, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Faculty of Biology, University of Freiburg, Freiburg, Germany
| | - Fabian Gather
- Department of Molecular Embryology, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany
| | - Simone Probst
- Institute of Experimental and Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Amirhosein Naghsh-Nilchi
- Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, HezarJarib Street, Isfahan 81746-73441, Iran
| | - Tanja Vogel
- Department of Molecular Embryology, Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, 79104 Freiburg, Germany; Centre for Basics in Neuromodulation (Neuromodul Basics), Freiburg, Germany.
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2
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Wang J, Huang Y, Zhang C, Ruan Y, Tian Y, Wang F, Xu Y, Yu M, Wang J, Cheng Y, Liu L, Yang R, Wang J, Yang Y, Xiong J, Hu Y, Jian R, Ni B, Wu W, Zhang J. Identification and Functional Evaluation of Alternative Splice Variants of Dax1 in Mouse Embryonic Stem Cells. Stem Cells Dev 2023; 32:554-564. [PMID: 37261981 DOI: 10.1089/scd.2023.0037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
Dax1 (Nr0b1; Dosage-sensitive sex reversal-adrenal hypoplasia congenital on the X-chromosome gene-1) is an important component of the transcription factor network that governs pluripotency in mouse embryonic stem cells (ESCs). Functional evaluation of alternative splice variants of pluripotent transcription factors has shed additional insight on the maintenance of ESC pluripotency and self-renewal. Dax1 splice variants have not been identified and characterized in mouse ESCs. We identified 18 new transcripts of Dax1 with putative protein-coding properties and compared their protein structures with known Dax1 protein (Dax1-472). The expression pattern analysis showed that the novel isoforms were cotranscribed with Dax1-472 in mouse ESCs, but they had transcriptional heterogeneity among single cells and the subcellular localization of the encoded proteins differed. Cell function experiments indicated that Dax1-404 repressed Gata6 transcription and functionally replaced Dax1-472, while Dax1-38 and Dax1-225 partially antagonized Dax1-472 transcriptional repression. This study provided a comprehensive characterization of the Dax1 splice variants in mouse ESCs and suggested complex effects of Dax1 variants in a self-renewal regulatory network.
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Affiliation(s)
- Jiaqi Wang
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
- Department of Pathophysiology, College of High-Altitude Military Medicine, Army Medical University, Chongqing, China
| | - Yi Huang
- Biomedical Analysis Center, Army Medical University, Chongqing, China
| | - Chen Zhang
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Yan Ruan
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Yanping Tian
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Fengsheng Wang
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
- State Key Laboratory of NBC Protection for Civilian, Beijing, China
| | - Yixiao Xu
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Meng Yu
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
- Department of Joint Surgery, Southwest Hospital, The First Hospital Affiliated to Army Medical University, Chongqing, China
| | - Jiangjun Wang
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
- Department of Cell Biology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Yuda Cheng
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Lianlian Liu
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Ran Yang
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
- Department of Pathophysiology, College of High-Altitude Military Medicine, Army Medical University, Chongqing, China
| | - Jiali Wang
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Yi Yang
- Experimental Center of Basic Medicine, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Jiaxiang Xiong
- Experimental Center of Basic Medicine, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Yan Hu
- Department of Military Basic Training and Army Management, Army Health Service Training Base, Army Medical University, Chongqing, China
| | - Rui Jian
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
| | - Bing Ni
- Department of Pathophysiology, College of High-Altitude Military Medicine, Army Medical University, Chongqing, China
| | - Wei Wu
- Department of Department of Thoracic Surgery, Southwest Hospital, The First Hospital Affiliated to Army Medical University, Chongqing, China
| | - Junlei Zhang
- Laboratory of Stem Cell and Developmental Biology, Department of Histology and Embryology, College of Basic Medical Science, Army Medical University, Chongqing, China
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3
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Ruan Y, Wang J, Yu M, Wang F, Wang J, Xu Y, Liu L, Cheng Y, Yang R, Zhang C, Yang Y, Wang J, Wu W, Huang Y, Tian Y, Chen G, Zhang J, Jian R. A multi-omics integrative analysis based on CRISPR screens re-defines the pluripotency regulatory network in ESCs. Commun Biol 2023; 6:410. [PMID: 37059858 PMCID: PMC10104827 DOI: 10.1038/s42003-023-04700-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 03/13/2023] [Indexed: 04/16/2023] Open
Abstract
A comprehensive and precise definition of the pluripotency gene regulatory network (PGRN) is crucial for clarifying the regulatory mechanisms in embryonic stem cells (ESCs). Here, after a CRISPR/Cas9-based functional genomics screen and integrative analysis with other functional genomes, transcriptomes, proteomes and epigenome data, an expanded pluripotency-associated gene set is obtained, and a new PGRN with nine sub-classes is constructed. By integrating the DNA binding, epigenetic modification, chromatin conformation, and RNA expression profiles, the PGRN is resolved to six functionally independent transcriptional modules (CORE, MYC, PAF, PRC, PCGF and TBX). Spatiotemporal transcriptomics reveal activated CORE/MYC/PAF module activity and repressed PRC/PCGF/TBX module activity in both mouse ESCs (mESCs) and pluripotent cells of early embryos. Moreover, this module activity pattern is found to be shared by human ESCs (hESCs) and cancers. Thus, our results provide novel insights into elucidating the molecular basis of ESC pluripotency.
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Affiliation(s)
- Yan Ruan
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Jiaqi Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
- Department of Pathophysiology, College of High Altitude Military Medicine, Army Medical University, Chongqing, 400038, China
| | - Meng Yu
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
- Department of Joint Surgery, The First Affiliated Hospital, Army Medical University, Chongqing, 400038, China
| | - Fengsheng Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
- State Key Laboratory of NBC Protection for Civilian, Beijing, 102205, China
| | - Jiangjun Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
- Department of Cell Biology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Yixiao Xu
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Lianlian Liu
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Yuda Cheng
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Ran Yang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
- Department of Pathophysiology, College of High Altitude Military Medicine, Army Medical University, Chongqing, 400038, China
| | - Chen Zhang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Yi Yang
- Experimental Center of Basic Medicine, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - JiaLi Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Wei Wu
- Thoracic Surgery Department, Southwest Hospital, The First Hospital Affiliated to Army Medical University, Chongqing, 400038, China
| | - Yi Huang
- Biomedical Analysis Center, Army Medical University, Chongqing, 400038, China
| | - Yanping Tian
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China
| | - Guangxing Chen
- Department of Joint Surgery, The First Affiliated Hospital, Army Medical University, Chongqing, 400038, China.
| | - Junlei Zhang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China.
| | - Rui Jian
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, College of Basic Medical Sciences, Army Medical University, Chongqing, 400038, China.
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4
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Zhang S, Chong LH, Woon JYX, Chua TX, Cheruba E, Yip AK, Li HY, Chiam KH, Koh CG. Zyxin regulates embryonic stem cell fate by modulating mechanical and biochemical signaling interface. Commun Biol 2023; 6:62. [PMID: 36653484 PMCID: PMC9849324 DOI: 10.1038/s42003-023-04421-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 01/04/2023] [Indexed: 01/19/2023] Open
Abstract
Biochemical signaling and mechano-transduction are both critical in regulating stem cell fate. How crosstalk between mechanical and biochemical cues influences embryonic development, however, is not extensively investigated. Using a comparative study of focal adhesion constituents between mouse embryonic stem cell (mESC) and their differentiated counterparts, we find while zyxin is lowly expressed in mESCs, its levels increase dramatically during early differentiation. Interestingly, overexpression of zyxin in mESCs suppresses Oct4 and Nanog. Using an integrative biochemical and biophysical approach, we demonstrate involvement of zyxin in regulating pluripotency through actin stress fibres and focal adhesions which are known to modulate cellular traction stress and facilitate substrate rigidity-sensing. YAP signaling is identified as an important biochemical effector of zyxin-induced mechanotransduction. These results provide insights into the role of zyxin in the integration of mechanical and biochemical cues for the regulation of embryonic stem cell fate.
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Affiliation(s)
- Songjing Zhang
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Lor Huai Chong
- Bioinformatics Institute A*STAR, Singapore, Singapore.,School of Pharmacy, Monash University Malaysia, Subang Jaya, Malaysia
| | - Jessie Yong Xing Woon
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Theng Xuan Chua
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | | | - Ai Kia Yip
- Bioinformatics Institute A*STAR, Singapore, Singapore
| | - Hoi-Yeung Li
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | | | - Cheng-Gee Koh
- School of Biological Sciences, Nanyang Technological University, Singapore, Singapore.
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5
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Hatabi K, Hirohara Y, Kushida Y, Kuroda Y, Wakao S, Trosko J, Dezawa M. Inhibition of Gap Junctional Intercellular Communication Upregulates Pluripotency Gene Expression in Endogenous Pluripotent Muse Cells. Cells 2022; 11:2701. [PMID: 36078111 PMCID: PMC9455024 DOI: 10.3390/cells11172701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 08/19/2022] [Accepted: 08/22/2022] [Indexed: 11/18/2022] Open
Abstract
Gap junctions (GJ) are suggested to support stem cell differentiation. The Muse cells that are applied in clinical trials are non-tumorigenic pluripotent-like endogenous stem cells, can be collected as stage-specific embryonic antigen 3 (SSEA-3+) positive cells from multiple tissues, and show triploblastic differentiation and self-renewability at a single cell level. They were reported to up-regulate pluripotency gene expression in suspension. We examined how GJ inhibition affected pluripotency gene expression in adherent cultured-Muse cells. Muse cells, mainly expressing gap junction alpha-1 protein (GJA1), reduced GJ intercellular communication from ~85% to 5-8% after 24 h incubation with 120 μM 18α-glycyrrhetinic acid, 400 nM 12-O-tetradecanoylphorbol-13-acetate, and 90 μM dichlorodiphenyltrichloroethane, as confirmed by a dye-transfer assay. Following inhibition, NANOG, OCT3/4, and SOX2 were up-regulated 2-4.5 times more; other pluripotency-related genes, such as KLF4, CBX7, and SPRY2 were elevated; lineage-specific differentiation-related genes were down-regulated in quantitative-PCR and RNA-sequencing. Connexin43-siRNA introduction also confirmed the up-regulation of NANOG, OCT3/4, and SOX2. YAP, a co-transcriptional factor in the Hippo signaling pathway that regulates pluripotency gene expression, co-localized with GJA1 (also known as Cx43) in the cell membrane and was translocated to the nucleus after GJ inhibition. Adherent culture is usually more suitable for the stable expansion of cells than is a suspension culture. GJ inhibition is suggested to be a simple method to up-regulate pluripotency in an adherent culture that involves a Cx43-YAP axis in pluripotent stem cells, such as Muse cells.
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Affiliation(s)
- Khaled Hatabi
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai 980–8575, Japan
| | - Yukari Hirohara
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai 980–8575, Japan
- Regenerative Medicine Division, Life Science Institute, Inc., Tokyo 135-0004, Japan
| | - Yoshihiro Kushida
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai 980–8575, Japan
| | - Yasumasa Kuroda
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai 980–8575, Japan
| | - Shohei Wakao
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai 980–8575, Japan
| | - James Trosko
- Department of Pediatrics and Human Development, College of Human Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Mari Dezawa
- Department of Stem Cell Biology and Histology, Tohoku University Graduate School of Medicine, Sendai 980–8575, Japan
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6
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Basak T, Ain R. Molecular regulation of trophoblast stem cell self-renewal and giant cell differentiation by the Hippo components YAP and LATS1. Stem Cell Res Ther 2022; 13:189. [PMID: 35526072 PMCID: PMC9080189 DOI: 10.1186/s13287-022-02844-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 03/22/2022] [Indexed: 11/25/2022] Open
Abstract
Background Trophoblast stem cells (TSCs), the precursors of trophoblast cells of placenta, possess the potential to differentiate into various trophoblastic subtypes in vitro. Establishment of extraembryonic trophoblastic lineage is preceded by the “outside versus inside” positional information in preimplantation embryos, critically synchronized by the Hippo components. Abundant expression of Hippo effector YAP in TSCs and differentiated cells with paucity of information on Hippo regulation of TSC proliferation/differentiation led us test the hypothesis that Hippo dynamics is one of the regulators of TSC proliferation/differentiation. Methods Blastocyst-derived murine TSCs were used. Dynamics of Hippo components were analyzed using immunofluorescence, western blotting, immunoprecipitation, qRT-PCR. Interaction studies were performed using full-length and deletion constructs. BrdU incorporation assay, flow cytometry-based polyploidy analysis and confocal microscopy were used to decipher the underlying mechanism. Results YAP translocates to the nucleus in TSCs and utilizes its WW2 domain to interact with the PPQY motif of the stemness factor, CDX2. YAP limits TSC proliferation with associated effect on CDX2 target CyclinD1. Trophoblast giant cells (TGC) differentiation is associated with cytoplasmic retention of YAP, heightened pYAPSer127, decrease in the level of the core Hippo component, LATS1, which thereby impedes LATS1-LIMK2 association. Decreased LATS1-LIMK2 complex formation in TGCs was associated with elevated pLIMK2Thr505 as well as its target pCOFILINSer3. Precocious overexpression of LATS1 during trophoblast differentiation decreased TGC marker, Prl2c2, diminished pLIMK2Thr505 and inactive COFILIN (pCOFILINSer3) while COFILIN-phosphatase, CHRONOPHIN remained unchanged. LATS1 overexpression inhibited trophoblast endoreduplication with smaller-sized TGC-nuclei, lower ploidy level and disintegrated actin filaments. Inhibition of LIMK2 activity recapitulated the effects of LATS1 overexpression in trophoblast cells. Conclusion These results unveil a multilayered regulation of trophoblast self-renewal and differentiation by the Hippo components. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02844-w.
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Affiliation(s)
- Trishita Basak
- Division of Cell Biology and Physiology, CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Jadavpur, Kolkata, West Bengal, 700032, India
| | - Rupasri Ain
- Division of Cell Biology and Physiology, CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Jadavpur, Kolkata, West Bengal, 700032, India.
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7
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Xu Y, Wang X, Yu M, Ruan Y, Zhang J, Tian Y, Xiong J, Liu L, Cheng Y, Yang Y, Ren B, Chen G, Zhang Y, Zhao B, Wang J, Wang J, Jian R, Liu Y, Wang J. Identification, subcellular localization, and functional comparison of novel Yap splicing isoforms in mouse embryonic stem cells. IUBMB Life 2021; 73:1432-1445. [PMID: 34687583 DOI: 10.1002/iub.2571] [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: 06/30/2021] [Accepted: 10/11/2021] [Indexed: 11/06/2022]
Abstract
Hippo signaling pathway is involved in many biological processes including the fate decision of embryonic stem cells (ESCs). Yes-associated protein (Yap) function as a key effector of Hippo pathway, but its role in ESCs is still controversial. So far, only two isoforms of Yap have been identified and they have both overlapping and distinct functions. Here, we identify six novel isoforms of mouse Yap, bringing the total number of isoforms to eight. According to the differences in the first exon, they are divided into two subtypes (a and b). Isoform-a and isoform-b exhibit different subcellular localizations. Moreover, isoform-a can fully reverse the impaired self-renewal phenotype induced by Yap knockout (KO). Upon overexpression, isoform-a moderately promotes mESCs self-renewal and markedly delays differentiation. On the contrary, no significant pro-self-renewal phenotype is observed when isoform-b overexpressed in wildtype (WT) mESCs or re-expressed in Yap KO cell lines. These finding not only help to clarify the role of Yap in mESCs, but also lay the foundation for advancing functional researches of Yap in other processes.
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Affiliation(s)
- Yixiao Xu
- Southwest Hospital/Southwest Eye Hospital, Army Medical University, Chongqing, China.,Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Xueyue Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China.,Department of Pediatrics, The General Hospital of PLA Tibet Military Area Command, Lhasa, China
| | - Meng Yu
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China.,Joint Surgery Center, Southwest Hospital, Army Medical University, Chongqing, China
| | - Yan Ruan
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Junlei Zhang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Yanping Tian
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Jiaxiang Xiong
- Experimental Center of Basic Medicine, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Lianlian Liu
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Yuda Cheng
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Yi Yang
- Experimental Center of Basic Medicine, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Bangqi Ren
- Southwest Hospital/Southwest Eye Hospital, Army Medical University, Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
| | - Guangxing Chen
- Joint Surgery Center, Southwest Hospital, Army Medical University, Chongqing, China
| | - Yue Zhang
- Southwest Hospital/Southwest Eye Hospital, Army Medical University, Chongqing, China.,Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Binyu Zhao
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China.,Department of Physiology, Army Medical University, Chongqing, China
| | - Jiaqi Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China.,Institute of Immunology PLA and Department of Immunology, Army Medical University, Chongqing, China
| | - Jiangjun Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China.,Department of Cell Biology, College of Basic Medicine, Army Medical University, Chongqing, China
| | - Rui Jian
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
| | - Yong Liu
- Southwest Hospital/Southwest Eye Hospital, Army Medical University, Chongqing, China.,Key Lab of Visual Damage and Regeneration & Restoration of Chongqing, Chongqing, China
| | - Jiali Wang
- Laboratory of Stem Cell & Developmental Biology, Department of Histology and Embryology, Army Medical University, Chongqing, China
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