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Toriyama K, Au Yeung WK, Inoue A, Kurimoto K, Yabuta Y, Saitou M, Nakamura T, Nakano T, Sasaki H. DPPA3 facilitates genome-wide DNA demethylation in mouse primordial germ cells. BMC Genomics 2024; 25:344. [PMID: 38580899 PMCID: PMC10996186 DOI: 10.1186/s12864-024-10192-7] [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: 11/27/2023] [Accepted: 03/05/2024] [Indexed: 04/07/2024] Open
Abstract
BACKGROUND Genome-wide DNA demethylation occurs in mammalian primordial germ cells (PGCs) as part of the epigenetic reprogramming important for gametogenesis and resetting the epigenetic information for totipotency. Dppa3 (also known as Stella or Pgc7) is highly expressed in mouse PGCs and oocytes and encodes a factor essential for female fertility. It prevents excessive DNA methylation in oocytes and ensures proper gene expression in preimplantation embryos: however, its role in PGCs is largely unexplored. In the present study, we investigated whether or not DPPA3 has an impact on CG methylation/demethylation in mouse PGCs. RESULTS We show that DPPA3 plays a role in genome-wide demethylation in PGCs even before sex differentiation. Dppa3 knockout female PGCs show aberrant hypermethylation, most predominantly at H3K9me3-marked retrotransposons, which persists up to the fully-grown oocyte stage. DPPA3 works downstream of PRDM14, a master regulator of epigenetic reprogramming in embryonic stem cells and PGCs, and independently of TET1, an enzyme that hydroxylates 5-methylcytosine. CONCLUSIONS The results suggest that DPPA3 facilitates DNA demethylation through a replication-coupled passive mechanism in PGCs. Our study identifies DPPA3 as a novel epigenetic reprogramming factor in mouse PGCs.
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Affiliation(s)
- Keisuke Toriyama
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan
| | - Wan Kin Au Yeung
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan.
| | - Azusa Inoue
- Laboratory for Epigenome Inheritance, Riken Center for Integrative Medical Sciences, Kanagawa, 230-0045, Japan
- Tokyo Metropolitan University, Tokyo, 192-0397, Japan
| | - Kazuki Kurimoto
- Department of Embryology, School of Medicine, Nara Medical University, 840 Shijo-Cho, Kashihara, Nara, 634-8521, Japan
| | - Yukihiro Yabuta
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Yoshida-Konoe- cho, Sakyo-ku, Kyoto, 606-8501, Japan
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Mitinori Saitou
- Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Yoshida-Konoe- cho, Sakyo-ku, Kyoto, 606-8501, Japan
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, 606-8501, Japan
- Center for iPS Cell Research and Application (CiRA), Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Toshinobu Nakamura
- Laboratory for Epigenetic Regulation, Department of Animal Bio-Science, Nagahama Institute of Bio-Science and Technology, Shiga, 526-0829, Japan
| | - Toru Nakano
- Graduate School of Frontier Biosciences, Osaka University, Osaka, 565-0871, Japan
| | - Hiroyuki Sasaki
- Division of Epigenomics and Development, Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan.
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Liu S, Zhao S, Zhang C, Tian C, Wang D, Yu H, Li Z, Liu L, Liu N. Dppa3 Improves the Germline Competence of Pluripotent Stem Cells. Stem Cell Rev Rep 2023:10.1007/s12015-023-10552-y. [PMID: 37171679 DOI: 10.1007/s12015-023-10552-y] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/28/2023] [Indexed: 05/13/2023]
Abstract
BACKGROUND Chimera formation and germline competence are critical features of mouse pluripotent stem cells (PSCs). However, the factors that contribute to germline competence in the chimeras remain to be understood. METHODS To determine the role of Dppa3 in PSCs, we first constructed Dppa3 knockout (Dppa3 KO) and Dppa3 overexpression (Dppa3 OE) PSCs, respectively. Using Dppa3 KO and Dppa3 OE PSCs, we then investigated the role of Dppa3 in PSCs by evaluating the chimera generation, DNA methylation, and pluripotent state conversion. RESULTS We show that Dppa3 plays an important role in chimera formation and germline competence of mouse PSCs. PSC lines with high expression of Dppa3 show high germline competence. In contrast, Dppa3 deficiency reduces chimera formation and abrogates the germline transmission capacity of PSCs. Molecularly, Dppa3 facilitates establishing global DNA hypomethylation in PSCs. High levels of Dppa3 in PSCs reduce the expression of Dnmt3a/b and impede Uhrf1-Dnmt1 complex binding to DNA replication forks, maintaining DNA hypomethylation. Additionally, Dppa3 facilitates two-cell-stage (2C) genes expression and promotes conversion to a 2C-like state. CONCLUSION These data show that Dppa3 is involved in maintaining DNA hypomethylation homeostasis and is required for high chimera formation and germline competence of PSCs.
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Affiliation(s)
- Siying Liu
- School of Medicine, Nankai University, Tianjin, 300071, China
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences Nankai University, Tianjin, 300071, China
| | - Shuang Zhao
- School of Medicine, Nankai University, Tianjin, 300071, China
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Chuanyu Zhang
- School of Medicine, Nankai University, Tianjin, 300071, China
| | - Chenglei Tian
- College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Dan Wang
- School of Medicine, Nankai University, Tianjin, 300071, China
- MOE Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Huaxin Yu
- School of Medicine, Nankai University, Tianjin, 300071, China
| | - Zongjin Li
- School of Medicine, Nankai University, Tianjin, 300071, China
| | - Lin Liu
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences Nankai University, Tianjin, 300071, China.
- College of Life Sciences, Nankai University, Tianjin, 300071, China.
| | - Na Liu
- School of Medicine, Nankai University, Tianjin, 300071, China.
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences Nankai University, Tianjin, 300071, China.
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MacDonald JA, Sheehan HC, Piasecki A, Faustino LR, Hauschildt C, Stolzenbach V, Woods DC, Tilly JL. Characterization of Oogonial Stem Cells in Adult Mouse Ovaries with Age and Comparison to In Silico Data on Human Ovarian Aging. Stem Cells Dev 2023; 32:99-114. [PMID: 36594561 PMCID: PMC9986025 DOI: 10.1089/scd.2022.0284] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Many adult somatic stem cell lineages are comprised of subpopulations that differ in gene expression, mitotic activity, and differentiation status. In this study, we explored if cellular heterogeneity also exists within oogonial stem cells (OSCs), and how chronological aging impacts OSCs. In OSCs isolated from mouse ovaries by flow cytometry and established in culture, we identified subpopulations of OSCs that could be separated based on differential expression of stage-specific embryonic antigen 1 (SSEA1) and cluster of differentiation 61 (CD61). Levels of aldehyde dehydrogenase (ALDH) activity were inversely related to OSC differentiation, whereas commitment of OSCs to differentiation through transcriptional activation of stimulated by retinoic acid gene 8 was marked by a decline in ALDH activity and in SSEA1 expression. Analysis of OSCs freshly isolated from ovaries of mice between 3 and 20 months of age revealed that these subpopulations were present and persisted throughout adult life. However, expression of developmental pluripotency associated 3 (Dppa3), an epigenetic modifier that promotes OSC differentiation into oocytes, was lost as the mice transitioned from a time of reproductive compromise (10 months) to reproductive failure (15 months). Further analysis showed that OSCs from aged females could be established in culture, and that once established the cultured cells reactivated Dppa3 expression and the capacity for oogenesis. Analysis of single-nucleus RNA sequence data sets generated from ovaries of women in their 20s versus those in their late 40s to early 50s showed that the frequency of DPPA3-expressing cells decreased with advancing age, and this was paralleled by reduced expression of several key meiotic differentiation genes. These data support the existence of OSC subpopulations that differ in gene expression profiles and differentiation status. In addition, an age-related decrease in Dppa3/DPPA3 expression, which is conserved between mice and humans, may play a role in loss of the ability of OSCs to maintain oogenesis with age.
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Affiliation(s)
- Julie A MacDonald
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Hannah C Sheehan
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Andrew Piasecki
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Luciana R Faustino
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Charlotte Hauschildt
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Victor Stolzenbach
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Dori C Woods
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
| | - Jonathan L Tilly
- Laboratory of Aging and Infertility Research, Department of Biology, Northeastern University, Boston, Massachusetts, USA
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Zhao S, Zhang C, Xu J, Liu S, Yu L, Chen S, Wen H, Li Z, Liu N. Dppa3 facilitates self-renewal of embryonic stem cells by stabilization of pluripotent factors. Stem Cell Res Ther 2022; 13:169. [PMID: 35477484 PMCID: PMC9044575 DOI: 10.1186/s13287-022-02846-8] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 04/12/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Developmental pluripotency-associated 3 (Dppa3, also called Stella or PGC7) is a principal maternal protein specially expressed in pre-implantation embryos, embryonic stem cells (ES cells) and primordial germ cells (PGCs). It plays critical role in the regulating of DNA methylation in zygotes and oocytes. However, the effect of Dppa3 in ES cells on the stability of proteins is still unclear. METHODS In this study, we first identified the potential interacting proteins with Dppa3 using immunoprecipitation-mass spectrometry (IP-MS). After GO analysis, we further constructed Dppa3-silenced ES cells and ES cell lines overexpressing with different lengths of Dppa3 to explore the mechanisms of Dppa3 on protein stability. RESULTS IP-MS results showed that Dppa3 interacted with quite a few subunits of 26S proteasome. Full length of Dppa3 stabilized Uhrf1 and Nanog by inhibiting its degradation. Silencing Dppa3 promoted degradation of Nanog protein. CONCLUSIONS Our results indicated that Dppa3 safeguard the stability of Uhrf1 and Nanog by inhibiting proteasome-associated degradation in ES cells. These findings shed light on new function of Dppa3 in maintaining stability of proteins and provides a valuable resource for understanding the roles of Dppa3 in embryonic stem cells.
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Affiliation(s)
- Shuang Zhao
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China.,Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Chuanyu Zhang
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China
| | - Jia Xu
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China
| | - Siying Liu
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China
| | - Lu Yu
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China
| | - Shang Chen
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China
| | - Hang Wen
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China
| | - Zongjin Li
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China.,Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China
| | - Na Liu
- School of Medicine, Nankai University, 94# Weijin Road, Tianjin, 300071, China. .,Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, 300071, China.
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5
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Sang H, Wang D, Zhao S, Zhang J, Zhang Y, Xu J, Chen X, Nie Y, Zhang K, Zhang S, Wang Y, Wang N, Ma F, Shuai L, Li Z, Liu N. Dppa3 is critical for Lin28a-regulated ES cells naïve-primed state conversion. J Mol Cell Biol 2019; 11:474-488. [PMID: 30481289 PMCID: PMC6734493 DOI: 10.1093/jmcb/mjy069] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 09/26/2018] [Accepted: 11/26/2018] [Indexed: 12/22/2022] Open
Abstract
Lin28a is a pluripotent factor that promotes somatic cell reprogramming. Unlike other pluripotent factors, Lin28a expression is transient and accumulated in primed embryonic stem (ES) cells, but its exact function and mechanism in the conversion of ES cells from naïve to primed state remain unclear. Here, we present evidence for Dppa3, a protein originally known for its role in germ cell development, as a downstream target of Lin28a in naïve-primed conversion. Using rescue experiment, we demonstrate that Dppa3 functions predominantly downstream of Lin28a during naïve-primed state conversion. Higher level of Lin28a prevents let-7 maturation and results in Dnmt3a/b (target of let-7) upregulation, which in turn induces hypermethylation of the Dppa3 promoter. Dppa3 demarcates naïve versus primed pluripotency states. These results emphasize that Lin28a plays an important role during the naïve-primed state conversion of ES cells, which is partially mediated by a Lin28a-let-7-Dnmt3a/b-Dppa3 axis.
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Affiliation(s)
- Hui Sang
- School of Medicine, Nankai University, Tianjin, China
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
- College of Life Sciences, Nankai University, Tianjin, China
| | - Dan Wang
- School of Medicine, Nankai University, Tianjin, China
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
- College of Life Sciences, Nankai University, Tianjin, China
| | - Shuang Zhao
- School of Medicine, Nankai University, Tianjin, China
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
- College of Life Sciences, Nankai University, Tianjin, China
| | - Jinxin Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, China
| | - Yan Zhang
- School of Medicine, Nankai University, Tianjin, China
| | - Jia Xu
- School of Medicine, Nankai University, Tianjin, China
| | - Xiaoniao Chen
- State Key Laboratory of Kidney Diseases, Beijing, China
| | - Yan Nie
- School of Medicine, Nankai University, Tianjin, China
| | - Kaiyue Zhang
- School of Medicine, Nankai University, Tianjin, China
| | | | - Yuebing Wang
- School of Medicine, Nankai University, Tianjin, China
| | - Na Wang
- Department of Oncology-Pathology, Karolinska Institutet, Karolinska University Hospital CCK, Stockholm, Sweden
| | - Fengxia Ma
- State Key Lab of Experimental Hematology, Institute of Hematology &Hospital of Blood Diseases, Chinese Academy of Medical Sciences, Tianjin, China
| | - Ling Shuai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, Tianjin, China
| | - Zongjin Li
- School of Medicine, Nankai University, Tianjin, China
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Na Liu
- School of Medicine, Nankai University, Tianjin, China
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
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6
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Zhao S, Xu J, Liu S, Cui K, Li Z, Liu N. Dppa3 in pluripotency maintenance of ES cells and early embryogenesis. J Cell Biochem 2018; 120:4794-4799. [PMID: 30417435 DOI: 10.1002/jcb.28063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 10/22/2018] [Indexed: 01/11/2023]
Abstract
Embryonic development is precisely regulated by a network of signal pathways and specific genes. Dppa3 (also known as Pgc7 or Stella) plays an important role in early embryonic development during the cleavage stage as a maternal effect gene. Dppa3 expresses in many species, and its homologous gene in human and rat genomes is located at the same chromosomal regions and have the same exon-intron structure. However, unlike mouse embryonic stem (ES) cells, in which the Dppa3 promoter maintains hypomethylation that allows a high transcription level, the DPPA3 promoter region in human ES cells is methylated, much like that of mouse epiblast stem cell. Dppa3 is essential for early embryogenesis and pluripotency maintenance; however, the precise mechanism and downstream passage remains unknown. In this review, we will summarize some important functions of Dppa3 in early embryogenesis and pluripotency maintenance of mouse ES cells.
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Affiliation(s)
- Shuang Zhao
- School of Medicine, Nankai University, Tianjin, China.,Department of Genetics and Cell Biology, College of Life Sciences, Nankai University, Tianjin, China
| | - Jia Xu
- School of Medicine, Nankai University, Tianjin, China
| | - Siying Liu
- School of Medicine, Nankai University, Tianjin, China
| | - Kaige Cui
- School of Medicine, Nankai University, Tianjin, China
| | - Zongjin Li
- School of Medicine, Nankai University, Tianjin, China.,Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Na Liu
- School of Medicine, Nankai University, Tianjin, China.,Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
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7
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Plummer NW, Ungewitter EK, Smith KG, -C. Yao HH, Jensen P. A new mouse line for cell ablation by diphtheria toxin subunit A controlled by a Cre-dependent FLEx switch. Genesis 2017; 55:10.1002/dvg.23067. [PMID: 28875587 PMCID: PMC5671341 DOI: 10.1002/dvg.23067 10.1002/dvg.23067] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 07/13/2017] [Revised: 08/25/2017] [Accepted: 08/30/2017] [Indexed: 09/25/2023]
Abstract
Recombinase responsive mouse lines expressing diphtheria toxin subunit A (DTA) are well established tools for targeted ablation of genetically defined cell populations. Here we describe a new knock-in allele at the Gt(Rosa)26Sor locus that retains the best features of previously described DTA alleles-including a CAG promoter, attenuated mutant DTA cDNA, and ubiquitous EGFP labeling-with the addition of a Cre-dependent FLEx switch for tight control of expression. The FLEx switch consists of two pairs of antiparallel lox sites requiring Cre-mediated recombination for inversion of the DTA to the proper orientation for transcription. We demonstrate its utility by Cre-dependent ablation of both a broad domain in the embryonic nervous system and a discrete population of cells in the fetal gonads. We conclude that this new DTA line is useful for targeted ablation of genetically-defined cell populations.
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Affiliation(s)
- Nicholas W. Plummer
- Neurobiology Laboratory National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Erica K. Ungewitter
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Kathleen G. Smith
- Neurobiology Laboratory National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Humphrey H. -C. Yao
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Patricia Jensen
- Neurobiology Laboratory National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
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8
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Plummer NW, Ungewitter EK, Smith KG, -C. Yao HH, Jensen P. A new mouse line for cell ablation by diphtheria toxin subunit A controlled by a Cre-dependent FLEx switch. Genesis 2017; 55:10.1002/dvg.23067. [PMID: 28875587 PMCID: PMC5671341 DOI: 10.1002/dvg.23067+10.1002/dvg.23067] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/25/2017] [Accepted: 08/30/2017] [Indexed: 12/05/2023]
Abstract
Recombinase responsive mouse lines expressing diphtheria toxin subunit A (DTA) are well established tools for targeted ablation of genetically defined cell populations. Here we describe a new knock-in allele at the Gt(Rosa)26Sor locus that retains the best features of previously described DTA alleles-including a CAG promoter, attenuated mutant DTA cDNA, and ubiquitous EGFP labeling-with the addition of a Cre-dependent FLEx switch for tight control of expression. The FLEx switch consists of two pairs of antiparallel lox sites requiring Cre-mediated recombination for inversion of the DTA to the proper orientation for transcription. We demonstrate its utility by Cre-dependent ablation of both a broad domain in the embryonic nervous system and a discrete population of cells in the fetal gonads. We conclude that this new DTA line is useful for targeted ablation of genetically-defined cell populations.
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Affiliation(s)
- Nicholas W. Plummer
- Neurobiology Laboratory National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Erica K. Ungewitter
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Kathleen G. Smith
- Neurobiology Laboratory National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Humphrey H. -C. Yao
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
| | - Patricia Jensen
- Neurobiology Laboratory National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, NC 27709, USA
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9
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Plummer NW, Ungewitter EK, Smith KG, Yao HHC, Jensen P. A new mouse line for cell ablation by diphtheria toxin subunit A controlled by a Cre-dependent FLEx switch. Genesis 2017; 55. [PMID: 28875587 DOI: 10.1002/dvg.23067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/25/2017] [Accepted: 08/30/2017] [Indexed: 01/14/2023]
Abstract
Recombinase responsive mouse lines expressing diphtheria toxin subunit A (DTA) are well established tools for targeted ablation of genetically defined cell populations. Here we describe a new knock-in allele at the Gt(Rosa)26Sor locus that retains the best features of previously described DTA alleles-including a CAG promoter, attenuated mutant DTA cDNA, and ubiquitous EGFP labeling-with the addition of a Cre-dependent FLEx switch for tight control of expression. The FLEx switch consists of two pairs of antiparallel lox sites requiring Cre-mediated recombination for inversion of the DTA to the proper orientation for transcription. We demonstrate its utility by Cre-dependent ablation of both a broad domain in the embryonic nervous system and a discrete population of cells in the fetal gonads. We conclude that this new DTA line is useful for targeted ablation of genetically-defined cell populations.
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Affiliation(s)
- Nicholas W Plummer
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, 27709, USA
| | - Erica K Ungewitter
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, 27709, USA
| | - Kathleen G Smith
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, 27709, USA
| | - Humphrey H-C Yao
- Reproductive and Developmental Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, 27709, USA
| | - Patricia Jensen
- Neurobiology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina, 27709, USA
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