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Identification of the Time Period during Which BMP Signaling Regulates Proliferation of Neural Progenitor Cells in Zebrafish. Int J Mol Sci 2023; 24:ijms24021733. [PMID: 36675251 PMCID: PMC9863262 DOI: 10.3390/ijms24021733] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 01/06/2023] [Accepted: 01/13/2023] [Indexed: 01/18/2023] Open
Abstract
Bone morphogenetic protein (BMP) signaling regulates neural induction, neuronal specification, and neuronal differentiation. However, the role of BMP signaling in neural progenitors remains unclear. This is because interruption of BMP signaling before or during neural induction causes severe effects on subsequent neural developmental processes. To examine the role of BMP signaling in the development of neural progenitors in zebrafish, we bypassed the effect of BMP signaling on neural induction and suppressed BMP signaling at different time points during gastrulation using a temporally controlled transgenic line carrying a dominant-negative form of Bmp receptor type 1aa and a chemical inhibitor of BMP signaling, DMH1. Inhibiting BMP signaling from 8 hpf could bypass BMP regulation on neural induction, induce the number of proliferating neural progenitors, and reduce the number of neuronal precursors. Inhibiting BMP signaling upregulates the expression of the Notch downstream gene hairy/E(spl)-related 2 (her2). Inhibiting Notch signaling or knocking down the Her2 function reduced neural progenitor proliferation, whereas inactivating BMP signaling in Notch-Her2 deficient background restored the number of proliferating neural progenitors. These results reveal the time window for the proliferation of neural progenitors during zebrafish development and a fine balance between BMP and Notch signaling in regulating the proliferation of neural progenitor cells.
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Wei J, Shi Y, Zou C, Zhang H, Peng H, Wang S, Xia L, Yang Y, Zhang X, Liu J, Zhou H, Luo M, Huang A, Wang D. Cellular Id1 inhibits hepatitis B virus transcription by interacting with the novel covalently closed circular DNA-binding protein E2F4. Int J Biol Sci 2022; 18:65-81. [PMID: 34975318 PMCID: PMC8692152 DOI: 10.7150/ijbs.62106] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 10/05/2021] [Indexed: 02/07/2023] Open
Abstract
Hepatitis B virus (HBV) infection is a major risk factor for hepatocellular carcinoma (HCC), which required developing novel therapies targeting the inhibition of HBV transcription and replication due to current limited treatment options. We explored novel target for the development of novel therapies targeting the inhibition of HBV replication and transcription. The expression of Id1 and E2F4 in HCC cells and tissues was detected by qRT-PCR and western blot. We investigated the Id1 and E2F4-mediated transcription of HBV infection by using HepG2.2.15, HepAD38, HepG2-NTCP cell lines and AAV/HBV-infected mice. Interactions between the two host proteins and viral covalently closed circular DNA (cccDNA) were assessed using subcellular localization, protein-protein interaction, chromatin immunoprecipitation, and luciferase assays. Ectopic Id1 significantly reduced HBV transcription and replication in both HBV-expressing cells and AAV/HBV-infected mice. Id1 and E2F4 could form a heterodimer to prevent E2F4 from promoting HBV transcription and replication. E2F4 could directly bind to cccDNA and activate the HBV core promoter in cell lines. Furthermore, in vitro binding experiments confirmed that the sequence 1758'-TTAAAGGTC-1766', which is highly conserved among HBV genotypes, is the target site of the E2F4 homodimer. The findings suggest that E2F4 function as novel cccDNA-binding protein to directly activate HBV transcription by binding to Cp promoter region. Our results highlight the ability that E2F4 represent a pan-potential therapeutic target against HBV transcription and provide more clues to better understand the life cycle of HBV.
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Affiliation(s)
- Jie Wei
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400010, China.,Department of Clinical Laboratory, Zhuhai People's Hospital (Zhuhai hospital affiliated with Jinan University), Zhuhai, Guangdong, 519000, China
| | - Yueyuan Shi
- College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China.,Department of Clinical Laboratory, The People's Hospital of Yubei District of Chongqing City, Chongqing, 401120, China
| | - Chunhong Zou
- College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China
| | - Hongpeng Zhang
- Department of Laboratory Medicine, Chongqing Health Center for Women and Children, Chongqing, China, 401147, China
| | - Hui Peng
- Division of Gastroenterology, Cedars-Sinai Medical Center, Los Angeles, California. Davis Bldg., Room 3094, 8700 Beverly Blvd., Los Angeles, CA 90048
| | - Shilei Wang
- College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China
| | - Lulu Xia
- College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China
| | - Yuan Yang
- College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China
| | - Xiang Zhang
- College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China
| | - Junye Liu
- College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China
| | - Hua Zhou
- Department of Clinical Laboratory, The Second Affiliated Hospital of Chongqing Medical University, Yuzhong, Chongqing, 400010, China
| | - Miao Luo
- Department of Clinical Laboratory, The People's Hospital of Yubei District of Chongqing City, Chongqing, 401120, China
| | - Ailong Huang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400010, China
| | - Deqiang Wang
- Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Institute for Viral Hepatitis, Department of Infectious Diseases, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400010, China.,College of Laboratory Medicine, Chongqing Medical University, Yuzhong, Chongqing, 400016, China
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Lefeuvre C, Le Guillou-Guillemette H, Ducancelle A. A Pleiotropic Role of the Hepatitis B Virus Core Protein in Hepatocarcinogenesis. Int J Mol Sci 2021; 22:ijms222413651. [PMID: 34948447 PMCID: PMC8707456 DOI: 10.3390/ijms222413651] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/18/2021] [Accepted: 12/19/2021] [Indexed: 02/07/2023] Open
Abstract
Chronic hepatitis B virus (HBV) infection is one of the most common factors associated with hepatocellular carcinoma (HCC), which is the sixth most prevalent cancer among all cancers worldwide. However, the pathogenesis of HBV-mediated hepatocarcinogenesis is unclear. Evidence currently available suggests that the HBV core protein (HBc) plays a potential role in the development of HCC, such as the HBV X protein. The core protein, which is the structural component of the viral nucleocapsid, contributes to almost every stage of the HBV life cycle and occupies diverse roles in HBV replication and pathogenesis. Recent studies have shown that HBc was able to disrupt various pathways involved in liver carcinogenesis: the signaling pathways implicated in migration and proliferation of hepatoma cells, apoptosis pathways, and cell metabolic pathways inducing the development of HCC; and the immune system, through the expression and production of proinflammatory cytokines. In addition, HBc can modulate normal functions of hepatocytes through disrupting human host gene expression by binding to promoter regions. This HBV protein also promotes HCC metastasis through epigenetic alterations, such as micro-RNA. This review focuses on the molecular pathogenesis of the HBc protein in HBV-induced HCC.
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Affiliation(s)
- Caroline Lefeuvre
- Laboratoire de Virologie, Département de Biologie des Agents Infectieux, CHU Angers, F-49000 Angers, France; (H.L.G.-G.); (A.D.)
- HIFIH Laboratory UPRES EA3859, SFR ICAT 4208, Angers University, F-49000 Angers, France
- Correspondence:
| | - Hélène Le Guillou-Guillemette
- Laboratoire de Virologie, Département de Biologie des Agents Infectieux, CHU Angers, F-49000 Angers, France; (H.L.G.-G.); (A.D.)
- HIFIH Laboratory UPRES EA3859, SFR ICAT 4208, Angers University, F-49000 Angers, France
| | - Alexandra Ducancelle
- Laboratoire de Virologie, Département de Biologie des Agents Infectieux, CHU Angers, F-49000 Angers, France; (H.L.G.-G.); (A.D.)
- HIFIH Laboratory UPRES EA3859, SFR ICAT 4208, Angers University, F-49000 Angers, France
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Van Damme E, Vanhove J, Severyn B, Verschueren L, Pauwels F. The Hepatitis B Virus Interactome: A Comprehensive Overview. Front Microbiol 2021; 12:724877. [PMID: 34603251 PMCID: PMC8482013 DOI: 10.3389/fmicb.2021.724877] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 08/17/2021] [Indexed: 12/19/2022] Open
Abstract
Despite the availability of a prophylactic vaccine, chronic hepatitis B (CHB) caused by the hepatitis B virus (HBV) is a major health problem affecting an estimated 292 million people globally. Current therapeutic goals are to achieve functional cure characterized by HBsAg seroclearance and the absence of HBV-DNA after treatment cessation. However, at present, functional cure is thought to be complicated due to the presence of covalently closed circular DNA (cccDNA) and integrated HBV-DNA. Even if the episomal cccDNA is silenced or eliminated, it remains unclear how important the high level of HBsAg that is expressed from integrated HBV DNA is for the pathology. To identify therapies that could bring about high rates of functional cure, in-depth knowledge of the virus' biology is imperative to pinpoint mechanisms for novel therapeutic targets. The viral proteins and the episomal cccDNA are considered integral for the control and maintenance of the HBV life cycle and through direct interaction with the host proteome they help create the most optimal environment for the virus whilst avoiding immune detection. New HBV-host protein interactions are continuously being identified. Unfortunately, a compendium of the most recent information is lacking and an interactome is unavailable. This article provides a comprehensive review of the virus-host relationship from viral entry to release, as well as an interactome of cccDNA, HBc, and HBx.
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Affiliation(s)
- Ellen Van Damme
- Janssen Research & Development, Janssen Pharmaceutical Companies, Beerse, Belgium
| | - Jolien Vanhove
- Janssen Research & Development, Janssen Pharmaceutical Companies, Beerse, Belgium.,Early Discovery Biology, Charles River Laboratories, Beerse, Belgium
| | - Bryan Severyn
- Janssen Research & Development, Janssen Pharmaceutical Companies, Springhouse, PA, United States
| | - Lore Verschueren
- Janssen Research & Development, Janssen Pharmaceutical Companies, Beerse, Belgium
| | - Frederik Pauwels
- Janssen Research & Development, Janssen Pharmaceutical Companies, Beerse, Belgium
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