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Ishii C, Nakano H, Higashiseto R, Ooki Y, Umemura M, Takahashi S, Takahashi Y. Nescient helix-loop-helix 1 (Nhlh1) is a novel activating transcription factor 5 (ATF5) target gene in olfactory and vomeronasal sensory neurons in mice. Cell Tissue Res 2024; 396:85-94. [PMID: 38388750 DOI: 10.1007/s00441-024-03871-0] [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] [Received: 09/13/2023] [Accepted: 01/23/2024] [Indexed: 02/24/2024]
Abstract
Activating transcription factor 5 (ATF5) is a transcription factor that belongs to the cAMP-response element-binding protein/ATF family and is essential for the differentiation and survival of sensory neurons in mouse olfactory organs. However, transcriptional target genes for ATF5 have yet to be identified. In the present study, chromatin immunoprecipitation-quantitative polymerase chain reaction (ChIP-qPCR) experiments were performed to verify ATF5 target genes in the main olfactory epithelium and vomeronasal organ in the postnatal pups. ChIP-qPCR was conducted using hemagglutinin (HA)-tagged ATF5 knock-in olfactory organs. The results obtained demonstrated that ATF5-HA fusion proteins bound to the CCAAT/enhancer-binding protein-ATF response element (CARE) site in the enhancer region of nescient helix-loop-helix 1 (Nhlh1), a transcription factor expressed in differentiating olfactory and vomeronasal sensory neurons. Nhlh1 mRNA expression was downregulated in ATF5-deficient (ATF5-/-) olfactory organs. The LIM/homeobox protein transcription factor Lhx2 co-localized with ATF5 in the nuclei of olfactory and vomeronasal sensory neurons and bound to the homeodomain site proximal to the CARE site in the Nhlh1 gene. The CARE region of the Nhlh1 gene was enriched by the active enhancer marker, acetyl-histone H3 (Lys27). The present study identified Nhlh1 as a novel target gene for ATF5 in murine olfactory organs. ATF5 may upregulate Nhlh1 expression in concert with Lhx2, thereby promoting the differentiation of olfactory and vomeronasal sensory neurons.
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Affiliation(s)
- Chiharu Ishii
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Haruo Nakano
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan.
| | - Riko Higashiseto
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Yusaku Ooki
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Mariko Umemura
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Shigeru Takahashi
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Yuji Takahashi
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo 192-0392, Japan
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Wang L, Feng J, Deng Y, Yang Q, Wei Q, Ye D, Rong X, Guo J. CCAAT/Enhancer-Binding Proteins in Fibrosis: Complex Roles Beyond Conventional Understanding. RESEARCH (WASHINGTON, D.C.) 2022; 2022:9891689. [PMID: 36299447 PMCID: PMC9575473 DOI: 10.34133/2022/9891689] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 09/18/2022] [Indexed: 07/29/2023]
Abstract
CCAAT/enhancer-binding proteins (C/EBPs) are a family of at least six identified transcription factors that contain a highly conserved basic leucine zipper domain and interact selectively with duplex DNA to regulate target gene expression. C/EBPs play important roles in various physiological processes, and their abnormal function can lead to various diseases. Recently, accumulating evidence has demonstrated that aberrant C/EBP expression or activity is closely associated with the onset and progression of fibrosis in several organs and tissues. During fibrosis, various C/EBPs can exert distinct functions in the same organ, while the same C/EBP can exert distinct functions in different organs. Modulating C/EBP expression or activity could regulate various molecular processes to alleviate fibrosis in multiple organs; therefore, novel C/EBPs-based therapeutic methods for treating fibrosis have attracted considerable attention. In this review, we will explore the features of C/EBPs and their critical functions in fibrosis in order to highlight new avenues for the development of novel therapies targeting C/EBPs.
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Affiliation(s)
- Lexun Wang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jiaojiao Feng
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yanyue Deng
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Qianqian Yang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Quxing Wei
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Dewei Ye
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xianglu Rong
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jiao Guo
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
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Zhu H, Zhang X, Xu S, Wu J, Hou M, Zhao H, Zhou Q, Zhong X. Gene duplication, conservation, and divergence of activating transcription factor 5 gene in zebrafish. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART B, MOLECULAR AND DEVELOPMENTAL EVOLUTION 2022; 338:301-313. [PMID: 35226401 DOI: 10.1002/jez.b.23124] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 01/17/2022] [Accepted: 01/23/2022] [Indexed: 02/06/2023]
Abstract
Activating transcription factor 5 (Atf5) is a member of the ATF/CREB family of transcription factors and involved in diverse cellular functions and diseases in mammals. However, the function of atf5 remains largely unknown in fish. Here, we report the expression pattern and function of duplicated atf5 genes in zebrafish. The results showed that the gene structures of zebrafish atf5a and atf5b were similar to their mammalian orthologs. Zebrafish Atf5a and Atf5b shared an amino acid sequence identity of 40.7%. Zebrafish atf5a and atf5b had maternal origin with dynamic expression during embryonic development. Zebrafish atf5a mRNA is mainly enriched in olfactory epithelium, midbrain, and hindbrain, while zebrafish atf5b mRNA is mainly detected in midbrain, hindbrain, and liver during embryogenesis. The results of acute hypoxia experiment showed that atf5a mRNA was significantly upregulated in the brain, liver, and muscle, while atf5b mRNA was just increased significantly in the brain. Functional analysis showed that knockdown of atf5a affects the development of the ciliated neurons in zebrafish embryos. The effect was enhanced when atf5a MO was co-injected with atf5b MO. The development of ciliated neurons in zebrafish embryos was not affected by injection of atf5b MO alone. atf5a knockdown also affects the development of early-born olfactory neurons. The effects caused by atf5a knockdown could be rescued by atf5b mRNA. These results suggest that the duplicated atf5 genes may have evolved divergently and play redundant biological roles in the development of olfactory sensory neurons in zebrafish.
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Affiliation(s)
- Huihui Zhu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
| | - Xiaoyi Zhang
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
| | - Shifan Xu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
| | - Jiawen Wu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
| | - Mengying Hou
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
| | - Haobin Zhao
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
| | - Qingchun Zhou
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
| | - Xueping Zhong
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
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Renfro Z, White BE, Stephens KE. CCAAT enhancer binding protein gamma (C/EBP-γ): An understudied transcription factor. Adv Biol Regul 2022; 84:100861. [PMID: 35121409 PMCID: PMC9376885 DOI: 10.1016/j.jbior.2022.100861] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 01/10/2022] [Accepted: 01/24/2022] [Indexed: 05/03/2023]
Abstract
The CCAAT enhancer binding protein (C/EBP) family of transcription factors are important transcriptional mediators of a wide range of physiologic processes. C/EBP-γ is the shortest C/EBP protein and lacks a canonical activation domain for the recruitment of transcriptional machinery. Despite its ubiquitous expression and ability to dimerize with other C/EBP proteins, C/EBP-γ has been studied far less than other C/EBP proteins, and, to our knowledge, no review of its functions has been written. This review seeks to integrate the current knowledge about C/EBP-γ and its physiologic roles, especially in cell proliferation, the integrated stress response, oncogenesis, hematopoietic and nervous system development, and metabolism, as well as to identify areas for future research.
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Affiliation(s)
- Zachary Renfro
- Department of Pediatrics, Division of Infectious Diseases, College of Medicine, University of Arkansas for Medical Sciences, USA; Arkansas Children's Research Institute, 13 Children's Way, Mail slot 512-47, Little Rock, AR, 72202, USA.
| | - Bryan E White
- Department of Pediatrics, Division of Infectious Diseases, College of Medicine, University of Arkansas for Medical Sciences, USA; Arkansas Children's Research Institute, 13 Children's Way, Mail slot 512-47, Little Rock, AR, 72202, USA.
| | - Kimberly E Stephens
- Department of Pediatrics, Division of Infectious Diseases, College of Medicine, University of Arkansas for Medical Sciences, USA; Arkansas Children's Research Institute, 13 Children's Way, Mail slot 512-47, Little Rock, AR, 72202, USA.
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Katreddi RR, Forni PE. Mechanisms underlying pre- and postnatal development of the vomeronasal organ. Cell Mol Life Sci 2021; 78:5069-5082. [PMID: 33871676 PMCID: PMC8254721 DOI: 10.1007/s00018-021-03829-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/17/2021] [Accepted: 03/29/2021] [Indexed: 02/06/2023]
Abstract
The vomeronasal organ (VNO) is sensory organ located in the ventral region of the nasal cavity in rodents. The VNO develops from the olfactory placode during the secondary invagination of olfactory pit. The embryonic vomeronasal structure appears as a neurogenic area where migratory neuronal populations like endocrine gonadotropin-releasing hormone-1 (GnRH-1) neurons form. Even though embryonic vomeronasal structures are conserved across most vertebrate species, many species including humans do not have a functional VNO after birth. The vomeronasal epithelium (VNE) of rodents is composed of two major types of vomeronasal sensory neurons (VSNs): (1) VSNs distributed in the apical VNE regions that express vomeronasal type-1 receptors (V1Rs) and the G protein subunit Gαi2, and (2) VSNs in the basal territories of the VNE that express vomeronasal type-2 receptors (V2Rs) and the G subunit Gαo. Recent studies identified a third subclass of Gαi2 and Gαo VSNs that express the formyl peptide receptor family. VSNs expressing V1Rs or V2Rs send their axons to distinct regions of the accessory olfactory bulb (AOB). Together, VNO and AOB form the accessory olfactory system (AOS), an olfactory subsystem that coordinates the social and sexual behaviors of many vertebrate species. In this review, we summarize our current understanding of cellular and molecular mechanisms that underlie VNO development. We also discuss open questions for study, which we suggest will further enhance our understanding of VNO morphogenesis at embryonic and postnatal stages.
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Affiliation(s)
- Raghu Ram Katreddi
- Department of Biological Sciences, Center for Neuroscience Research, The RNA Institute, University At Albany, State University of New York, Albany, NY, USA
| | - Paolo E Forni
- Department of Biological Sciences, Center for Neuroscience Research, The RNA Institute, University At Albany, State University of New York, Albany, NY, USA.
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Nakano H, Kawai S, Ooki Y, Chiba T, Ishii C, Nozawa T, Utsuki H, Umemura M, Takahashi S, Takahashi Y. Functional validation of epitope-tagged ATF5 knock-in mice generated by improved genome editing of oviductal nucleic acid delivery (i-GONAD). Cell Tissue Res 2021; 385:239-249. [PMID: 33825962 DOI: 10.1007/s00441-021-03450-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 03/10/2021] [Indexed: 11/25/2022]
Abstract
Activating transcription factor 5 (ATF5) is a stress-responsive transcription factor that belongs to the cAMP response element-binding protein (CREB)/ATF family, and is essential for the differentiation and survival of sensory neurons in murine olfactory organs. However, the study of associated proteins and target genes for ATF5 has been hampered due to the limited availability of immunoprecipitation-grade ATF5 antibodies. To overcome this issue, we generated hemagglutinin (HA)-tag knock-in mice for ATF5 using CRISPR/Cas9-mediated genome editing with one-step electroporation in oviducts (i-GONAD). ATF5-HA fusion proteins were detected in the nuclei of immature and some mature olfactory and vomeronasal sensory neurons in the main olfactory epithelium and vomeronasal organ, respectively, as endogenous ATF5 proteins were expressed, and some ATF5-HA proteins were found to be phosphorylated. Chromatin immunoprecipitation (ChIP) experiments revealed that ATF5-HA bound to the CCAAT/enhancer-binding protein (C/EBP)-ATF response element site in the promotor region of receptor transporting protein 1 (Rtp1), a chaperone gene responsible for proper olfactory receptor expression. These knock-in mice may be used to examine the expression, localization, and protein-protein/-DNA interactions of endogenous ATF5 and, ultimately, the function of ATF5 in vivo.
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Affiliation(s)
- Haruo Nakano
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan.
| | - Shiori Kawai
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yusaku Ooki
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Tomoki Chiba
- Department of Systems BioMedicine, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Chiharu Ishii
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Takumi Nozawa
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Hisako Utsuki
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Mariko Umemura
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Shigeru Takahashi
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Yuji Takahashi
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life Sciences, 1432-1, Horinouchi, Hachioji, Tokyo, 192-0392, Japan
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