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Zhang Q, Li J, Liu F, Hu J, Liu F, Zou J, Wang X. Ephrin B2 (EFNB2) potentially protects against intervertebral disc degeneration through inhibiting nucleus pulposus cell apoptosis. Arch Biochem Biophys 2024; 756:109990. [PMID: 38636690 DOI: 10.1016/j.abb.2024.109990] [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: 10/09/2023] [Revised: 03/20/2024] [Accepted: 04/11/2024] [Indexed: 04/20/2024]
Abstract
Nucleus pulposus (NP) cell apoptosis is a significant indication of accelerated intervertebral disc degeneration; however, the precise mechanism is unelucidated as of yet. Ephrin B2 (EFNB2), the only gene down-regulated in the three degraded intervertebral disc tissue microarray groups (GSE70362, GSE147383 and GSE56081), was screened for examination in this study. Subsequently, EFNB2 was verified to be down-regulated in degraded NP tissue samples. Interleukin-1 (IL-1β) treatment of NP cells to simulate the IDD environment indicated that IL-1β treatment decreased EFNB2 expression. In degenerative NP cells stimulated by IL-1β, EFNB2 knockdown significantly increased the rate of apoptosis as well as the apoptosis-related molecules cleaved-caspase-3 and the Bax to Bcl-2 ratio. EFNB2 was found to promote AKT, PI3K, and mTOR phosphorylation; the PI3K/AKT signaling role was investigated using the PI3K inhibitor LY294002. EFNB2 overexpression significantly increased PI3K/AKT pathway activity in IL-1β-stimulated NP cells than the normal control. Moreover, EFNB2 partially alleviated NP cell apoptosis induced by IL-1β, reduced the cleaved-cas3 level, and decreased the Bax/Bcl-2 ratio after the addition of the inhibitor LY294002. Additionally, EFNB2 overexpression inhibited the ERK1/2 phosphorylation; the effects of EFNB2 overexpression on ERK1/2 phosphorylation, degenerative NP cell viability, and cell apoptosis were partially reversed by ERK signaling activator Ceramide C6. EFNB2 comprehensively inhibited the apoptosis of NP cells by activating the PI3K/AKT signaling and inhibiting the ERK signaling, obviating the exacerbation of IDD. EFNB2 could be a potential target to protect against degenerative disc changes.
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Affiliation(s)
- Qianshi Zhang
- Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Jing Li
- Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Fubing Liu
- Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Jiarui Hu
- Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Fusheng Liu
- Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Jianfei Zou
- Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China
| | - Xiaobin Wang
- Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan, 410011, China.
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2
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Khan N, Kumar V, Li P, Schlapbach LJ, Boyd AW, Coulthard MG, Woodruff TM. Inhibiting Eph/ephrin signaling reduces vascular leak and endothelial cell dysfunction in mice with sepsis. Sci Transl Med 2024; 16:eadg5768. [PMID: 38657024 DOI: 10.1126/scitranslmed.adg5768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 04/02/2024] [Indexed: 04/26/2024]
Abstract
Sepsis is a life-threatening disease caused by a dysregulated host response to infection, resulting in 11 million deaths globally each year. Vascular endothelial cell dysfunction results in the loss of endothelial barrier integrity, which contributes to sepsis-induced multiple organ failure and mortality. Erythropoietin-producing hepatocellular carcinoma (Eph) receptors and their ephrin ligands play a key role in vascular endothelial barrier disruption but are currently not a therapeutic target in sepsis. Using a cecal ligation and puncture (CLP) mouse model of sepsis, we showed that prophylactic or therapeutic treatment of mice with EphA4-Fc, a decoy receptor and pan-ephrin inhibitor, resulted in improved survival and a reduction in vascular leak, lung injury, and endothelial cell dysfunction. EphA2-/- mice also exhibited reduced mortality and pathology after CLP compared with wild-type mice. Proteomics of plasma samples from mice with sepsis after CLP revealed dysregulation of a number of Eph/ephrins, including EphA2/ephrin A1. Administration of EphA4-Fc to cultured human endothelial cells pretreated with TNF-α or ephrin-A1 prevented loss of endothelial junction proteins, specifically VE-cadherin, with maintenance of endothelial barrier integrity. In children admitted to hospital with fever and suspected infection, we observed that changes in EphA2/ephrin A1 in serum samples correlated with endothelial and organ dysfunction. Targeting Eph/ephrin signaling may be a potential therapeutic strategy to reduce sepsis-induced endothelial dysfunction and mortality.
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Affiliation(s)
- Nemat Khan
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD 4072, Australia
- Mayne Academy of Paediatrics, Faculty of Medicine, University of Queensland, Queensland Children's Hospital, Brisbane, QLD 4101, Australia
| | - Vinod Kumar
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD 4072, Australia
| | - Pengcheng Li
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD 4072, Australia
- Mayne Academy of Paediatrics, Faculty of Medicine, University of Queensland, Queensland Children's Hospital, Brisbane, QLD 4101, Australia
| | - Luregn J Schlapbach
- Children's Intensive Care Research Program, Child Health Research Centre, University of Queensland, Brisbane, QLD 4101, Australia
- Paediatric Intensive Care Unit, Queensland Children's Hospital, Brisbane, QLD 4101, Australia
- Department of Intensive Care and Neonatology, and Children's Research Center, University Children's Hospital Zürich, University of Zürich, 8032 Zürich, Switzerland
| | - Andrew W Boyd
- Faculty of Medicine, University of Queensland, Brisbane, QLD 4006, Australia
| | - Mark G Coulthard
- Mayne Academy of Paediatrics, Faculty of Medicine, University of Queensland, Queensland Children's Hospital, Brisbane, QLD 4101, Australia
- Paediatric Intensive Care Unit, Queensland Children's Hospital, Brisbane, QLD 4101, Australia
| | - Trent M Woodruff
- School of Biomedical Sciences, Faculty of Medicine, University of Queensland, Brisbane, QLD 4072, Australia
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3
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Oguntuyo KY, Haas GD, Azarm KD, Stevens CS, Brambilla L, Kowdle SS, Avanzato VA, Pryce R, Freiberg AN, Bowden TA, Lee B. Structure-guided mutagenesis of Henipavirus receptor-binding proteins reveals molecular determinants of receptor usage and antibody-binding epitopes. J Virol 2024; 98:e0183823. [PMID: 38426726 PMCID: PMC10949843 DOI: 10.1128/jvi.01838-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Accepted: 02/05/2024] [Indexed: 03/02/2024] Open
Abstract
Nipah virus (NiV) is a highly lethal, zoonotic Henipavirus (HNV) that causes respiratory and neurological signs and symptoms in humans. Similar to other paramyxoviruses, HNVs mediate entry into host cells through the concerted actions of two surface glycoproteins: a receptor-binding protein (RBP) that mediates attachment and a fusion glycoprotein (F) that triggers fusion in an RBP-dependent manner. NiV uses ephrin-B2 (EFNB2) and ephrin-B3 (EFNB3) as entry receptors. Ghana virus (GhV), a novel HNV identified in a Ghanaian bat, uses EFNB2 but not EFNB3. In this study, we employ a structure-informed approach to identify receptor-interfacing residues and systematically introduce GhV-RBP residues into a NiV-RBP backbone to uncover the molecular determinants of EFNB3 usage. We reveal two regions that severely impair EFNB3 binding by NiV-RBP and EFNB3-mediated entry by NiV pseudotyped viral particles. Further analyses uncovered two-point mutations (NiVN557SGhV and NiVY581TGhV) pivotal for this phenotype. Moreover, we identify NiV interaction with Y120 of EFNB3 as important for the usage of this receptor. Beyond these EFNB3-related findings, we reveal two domains that restrict GhV binding of EFNB2, confirm the HNV-head as an immunodominant target for polyclonal and monoclonal antibodies, and describe putative epitopes for GhV- and NiV-specific monoclonal antibodies. Cumulatively, the work presented here generates useful reagents and tools that shed insight to residues important for NiV usage of EFNB3, reveal regions critical for GhV binding of EFNB2, and describe putative HNV antibody-binding epitopes. IMPORTANCE Hendra virus and Nipah virus (NiV) are lethal, zoonotic Henipaviruses (HNVs) that cause respiratory and neurological clinical features in humans. Since their initial outbreaks in the 1990s, several novel HNVs have been discovered worldwide, including Ghana virus. Additionally, there is serological evidence of zoonotic transmission, lending way to concerns about future outbreaks. HNV infection of cells is mediated by the receptor-binding protein (RBP) and the Fusion protein (F). The work presented here identifies NiV RBP amino acids important for the usage of ephrin-B3 (EFNB3), a receptor highly expressed in neurons and predicted to be important for neurological clinical features caused by NiV. This study also characterizes epitopes recognized by antibodies against divergent HNV RBPs. Together, this sheds insight to amino acids critical for HNV receptor usage and antibody binding, which is valuable for future studies investigating determinants of viral pathogenesis and developing antibody therapies.
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Affiliation(s)
| | - Griffin D. Haas
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Kristopher D. Azarm
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Christian S. Stevens
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Luca Brambilla
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Shreyas S. Kowdle
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Victoria A. Avanzato
- Division of Structural Biology, Wellcome Center for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Rhys Pryce
- Division of Structural Biology, Wellcome Center for Human Genetics, University of Oxford, Oxford, United Kingdom
| | | | - Thomas A. Bowden
- Division of Structural Biology, Wellcome Center for Human Genetics, University of Oxford, Oxford, United Kingdom
| | - Benhur Lee
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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4
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Cameron O, Neves JF, Gentleman E. Listen to Your Gut: Key Concepts for Bioengineering Advanced Models of the Intestine. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2302165. [PMID: 38009508 PMCID: PMC10837392 DOI: 10.1002/advs.202302165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 10/12/2023] [Indexed: 11/29/2023]
Abstract
The intestine performs functions central to human health by breaking down food and absorbing nutrients while maintaining a selective barrier against the intestinal microbiome. Key to this barrier function are the combined efforts of lumen-lining specialized intestinal epithelial cells, and the supportive underlying immune cell-rich stromal tissue. The discovery that the intestinal epithelium can be reproduced in vitro as intestinal organoids introduced a new way to understand intestinal development, homeostasis, and disease. However, organoids reflect the intestinal epithelium in isolation whereas the underlying tissue also contains myriad cell types and impressive chemical and structural complexity. This review dissects the cellular and matrix components of the intestine and discusses strategies to replicate them in vitro using principles drawing from bottom-up biological self-organization and top-down bioengineering. It also covers the cellular, biochemical and biophysical features of the intestinal microenvironment and how these can be replicated in vitro by combining strategies from organoid biology with materials science. Particularly accessible chemistries that mimic the native extracellular matrix are discussed, and bioengineering approaches that aim to overcome limitations in modelling the intestine are critically evaluated. Finally, the review considers how further advances may extend the applications of intestinal models and their suitability for clinical therapies.
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Affiliation(s)
- Oliver Cameron
- Centre for Craniofacial and Regenerative BiologyKing's College LondonLondonSE1 9RTUK
| | - Joana F. Neves
- Centre for Host‐Microbiome InteractionsKing's College LondonLondonSE1 9RTUK
| | - Eileen Gentleman
- Centre for Craniofacial and Regenerative BiologyKing's College LondonLondonSE1 9RTUK
- Department of Biomedical SciencesUniversity of LausanneLausanne1005Switzerland
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5
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Yu H, Qin XK, Yin KW, Li ZM, Ni ED, Yang JM, Liu XH, Zhou AJ, Li SJ, Gao TM, Li Y, Li JM. EphB6 deficiency in intestinal neurons promotes tumor growth in colorectal cancer by neurotransmitter GABA signaling. Carcinogenesis 2023; 44:682-694. [PMID: 37294054 DOI: 10.1093/carcin/bgad041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/24/2023] [Accepted: 06/08/2023] [Indexed: 06/10/2023] Open
Abstract
EphB6 belongs to the receptor tyrosine kinase, whose low expression is associated with shorter survival of colorectal cancer (CRC) patients. But the role and mechanism of EphB6 in the progression of CRC need further study. In addition, EphB6 was mainly expressed in intestinal neurons. But how EphB6 is involved in functions of intestinal neurons has not been known. In our study, we constructed a mouse xenograft model of CRC by injecting CMT93 cells into the rectum of EphB6-deficient mice. We found that the deletion of EphB6 in mice promoted tumor growth of CMT93 cells in a xenograft model of CRC, which was independent of changes in the gut microbiota. Interestingly, inhibition of intestinal neurons by injecting botulinum toxin A into rectum of EphB6-deficient mice could eliminate the promotive effect of EphB6 deficiency on tumor growth in the xenograft model of CRC. Mechanically, the deletion of EphB6 in mice promoted the tumor growth in CRC by increasing GABA in the tumor microenvironment. Furthermore, EphB6 deficiency in mice increased the expression of synaptosomal-associated protein 25 in the intestinal myenteric plexus, which mediated the release of GABA. Our study concluded that EphB6 knockout in mice promotes tumor growth of CMT93 cells in a xenograft model of CRC by modulating GABA release. Our study found a new regulating mechanism of EphB6 on the tumor progression in CRC that is dependent on intestinal neurons.
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Affiliation(s)
- Hao Yu
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, People's Republic of China
| | - Xiao-Kang Qin
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, People's Republic of China
| | - Kai-Wen Yin
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, People's Republic of China
| | - Zi-Ming Li
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders Collaborative Innovation Center for Brain Science, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - En-De Ni
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, People's Republic of China
| | - Jian-Ming Yang
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders Collaborative Innovation Center for Brain Science, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Xun-Hua Liu
- Department of Pathology, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou 510080, People's Republic of China
| | - Ai-Jun Zhou
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, People's Republic of China
| | - Shu-Ji Li
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders Collaborative Innovation Center for Brain Science, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Tian-Ming Gao
- State Key Laboratory of Organ Failure Research, Key Laboratory of Mental Health of the Ministry of Education, Guangdong-Hong Kong-Macao Greater Bay Area Center for Brain Science and Brain-Inspired Intelligence, Guangdong Province Key Laboratory of Psychiatric Disorders Collaborative Innovation Center for Brain Science, Department of Neurobiology, School of Basic Medical Sciences, Southern Medical University, Guangzhou 510515, People's Republic of China
| | - Ying Li
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, People's Republic of China
| | - Jian-Ming Li
- Department of Pathology, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, People's Republic of China
- Department of Pathology, Soochow University Medical School, Suzhou 215123, People's Republic of China
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6
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Shi X, Lingerak R, Herting CJ, Ge Y, Kim S, Toth P, Wang W, Brown BP, Meiler J, Sossey-Alaoui K, Buck M, Himanen J, Hambardzumyan D, Nikolov DB, Smith AW, Wang B. Time-resolved live-cell spectroscopy reveals EphA2 multimeric assembly. Science 2023; 382:1042-1050. [PMID: 37972196 PMCID: PMC11114627 DOI: 10.1126/science.adg5314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 11/01/2023] [Indexed: 11/19/2023]
Abstract
Ephrin type-A receptor 2 (EphA2) is a receptor tyrosine kinase that initiates both ligand-dependent tumor-suppressive and ligand-independent oncogenic signaling. We used time-resolved, live-cell fluorescence spectroscopy to show that the ligand-free EphA2 assembles into multimers driven by two types of intermolecular interactions in the ectodomain. The first type entails extended symmetric interactions required for ligand-induced receptor clustering and tumor-suppressive signaling that inhibits activity of the oncogenic extracellular signal-regulated kinase (ERK) and protein kinase B (AKT) protein kinases and suppresses cell migration. The second type is an asymmetric interaction between the amino terminus and the membrane proximal domain of the neighboring receptors, which supports oncogenic signaling and promotes migration in vitro and tumor invasiveness in vivo. Our results identify the molecular interactions that drive the formation of the EphA2 multimeric signaling clusters and reveal the pivotal role of EphA2 assembly in dictating its opposing functions in oncogenesis.
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Affiliation(s)
- Xiaojun Shi
- Division of Cancer Biology, Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Ryan Lingerak
- Division of Cancer Biology, Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Cameron J. Herting
- Department of Pediatrics, Aflac Cancer and Blood Disorders Center, Emory University, Atlanta, GA 30322, USA
| | - Yifan Ge
- Department of Molecular Biology, Massachusetts General Hospital and Department of Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Soyeon Kim
- Division of Cancer Biology, Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
| | - Paul Toth
- Department of Chemistry, University of Akron, Akron, OH 44325, USA
| | - Wei Wang
- Division of Cancer Biology, Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA
| | - Benjamin P. Brown
- Department of Chemistry, Center for Structural Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Jens Meiler
- Department of Chemistry, Center for Structural Biology, Vanderbilt University, Nashville, TN 37232, USA
| | - Khalid Sossey-Alaoui
- Division of Cancer Biology, Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA
| | - Matthias Buck
- Department of Physiology and Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Case Comprehensive Cancer Center, Cleveland, OH 44106, USA
| | - Juha Himanen
- Structural Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Dolores Hambardzumyan
- Departments Oncological Sciences and Neurosurgery, Tisch Cancer Institute, Icahn School of Medicine, Mount Sinai, New York, NY 10029, USA
| | - Dimitar B. Nikolov
- Structural Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Adam W. Smith
- Department of Chemistry, University of Akron, Akron, OH 44325, USA
| | - Bingcheng Wang
- Division of Cancer Biology, Department of Medicine, MetroHealth Medical Center, Cleveland, OH 44109, USA
- Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, USA
- Case Comprehensive Cancer Center, Cleveland, OH 44106, USA
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH 44106, USA
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7
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Oguntuyo KY, Haas GD, Azarm KD, Stevens CS, Brambilla L, Kowdle S, Avanzato VA, Pryce R, Freiberg AN, Bowden TA, Lee B. Structure guided mutagenesis of Henipavirus Receptor Binding Proteins reveals molecular determinants of receptor usage and antibody binding epitopes. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.22.568281. [PMID: 38045373 PMCID: PMC10690272 DOI: 10.1101/2023.11.22.568281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
Nipah virus (NiV) is a highly lethal, zoonotic henipavirus (HNV) that causes respiratory and neurological signs and symptoms in humans. Similar to other paramyxoviruses, HNVs mediate entry into host cells through the concerted actions of two surface glycoproteins: a receptor binding protein (RBP) that mediates attachment and a fusion glycoprotein (F) that triggers fusion in an RBP-dependent manner. NiV uses ephrin-B2 (EFNB2) and ephrin-B3 (EFNB3) as entry receptors. Ghana virus (GhV), a novel HNV identified in a Ghanaian bat, use EFNB2 but not EFNB3. In this study, we employ a structure-informed approach to identify receptor interfacing residues and systematically introduce GhV-RBP residues into a NiV-RBP backbone to uncover the molecular determinants of EFNB3 usage. We reveal two regions that severely impair EFNB3 binding by NiV-RBP and EFNB3-mediated entry by NiV pseudotyped viral particles. Further analyses uncovered two point mutations (NiVN557SGhV and NiVY581TGhV) pivotal for this phenotype. Moreover, we identify NiV interaction with Y120 of EFNB3 as important for usage of this receptor. Beyond these EFNB3-related findings, we reveal two domains that restrict GhV binding of EFNB2, identify the HNV-head as an immunodominant target for polyclonal and monoclonal antibodies, and describe putative epitopes for GhV and NiV-specific monoclonal antibodies. Cumulatively, the work presented here generates useful reagents and tools that shed insight to residues important for NiV usage of EFNB3, reveals regions critical for GhV binding of EFNB2, and describes putative HNV antibody binding epitopes.
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Affiliation(s)
- K Y Oguntuyo
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - G D Haas
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - K D Azarm
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - C S Stevens
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - L Brambilla
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - S Kowdle
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - V A Avanzato
- Division of Structural Biology, Wellcome Center for Human Genetics, University of Oxford, OX3 7BN Oxford, United Kingdom
| | - R Pryce
- Division of Structural Biology, Wellcome Center for Human Genetics, University of Oxford, OX3 7BN Oxford, United Kingdom
| | - A N Freiberg
- Department of Pathology, University of Texas Medical Branch, Galveston, TX, USA
| | - T A Bowden
- Division of Structural Biology, Wellcome Center for Human Genetics, University of Oxford, OX3 7BN Oxford, United Kingdom
| | - B Lee
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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8
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Qiu P, Li D, Xiao C, Xu F, Chen X, Chang Y, Liu L, Zhang L, Zhao Q, Chen Y. The Eph/ephrin system symphony of gut inflammation. Pharmacol Res 2023; 197:106976. [PMID: 38032293 DOI: 10.1016/j.phrs.2023.106976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 10/15/2023] [Accepted: 10/26/2023] [Indexed: 12/01/2023]
Abstract
The extent of gut inflammation depends largely on the gut barrier's integrity and enteric neuroimmune interactions. However, the factors and molecular mechanisms that regulate inflammation-related changes in the enteric nervous system (ENS) remain largely unexplored. Eph/ephrin signaling is critical for inflammatory response, neuronal activation, and synaptic plasticity in the brain, but its presence and function in the ENS have been largely unknown to date. This review discusses the critical role of Eph/ephrin in regulating gut homeostasis, inflammation, neuroimmune interactions, and pain pathways. Targeting the Eph/ephrin system offers innovative treatments for gut inflammation disorders, offering hope for enhanced patient prognosis, pain management, and overall quality of life.
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Affiliation(s)
- Peishan Qiu
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China
| | - Daojiang Li
- Department of General Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, China
| | - Cong Xiao
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China
| | - Fei Xu
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China
| | - Xiaoyu Chen
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China
| | - Ying Chang
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China
| | - Lan Liu
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China
| | - Lei Zhang
- Division of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
| | - Qiu Zhao
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China.
| | - Yuhua Chen
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China.
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9
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Xie Y, Reid CM, Granados AA, Garcia MT, Dale-Huang F, Hanson SM, Mancia W, Liu J, Adam M, Mosto O, Pisco AO, Alvarez-Buylla A, Harwell CC. Developmental origin and local signals cooperate to determine septal astrocyte identity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.08.561428. [PMID: 37873089 PMCID: PMC10592657 DOI: 10.1101/2023.10.08.561428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Astrocyte specification during development is influenced by both intrinsic and extrinsic factors, but the precise contribution of each remains poorly understood. Here we show that septal astrocytes from Nkx2.1 and Zic4 expressing progenitor zones are allocated into non-overlapping domains of the medial (MS) and lateral septal nuclei (LS) respectively. Astrocytes in these areas exhibit distinctive molecular and morphological features tailored to the unique cellular and synaptic circuit environment of each nucleus. Using single-nucleus (sn) RNA sequencing, we trace the developmental trajectories of cells in the septum and find that neurons and astrocytes undergo region and developmental stage-specific local cell-cell interactions. We show that expression of the classic morphogens Sonic hedgehog (Shh) and Fibroblast growth factors (Fgfs) by MS and LS neurons respectively, functions to promote the molecular specification of local astrocytes in each region. Finally, using heterotopic cell transplantation, we show that both morphological and molecular specifications of septal astrocytes are highly dependent on the local microenvironment, regardless of developmental origins. Our data highlights the complex interplay between intrinsic and extrinsic factors shaping astrocyte identities and illustrates the importance of the local environment in determining astrocyte functional specialization.
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Affiliation(s)
- Yajun Xie
- Department of Neurology, University of California, San Francisco, CA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA
| | - Christopher M. Reid
- Department of Neurology, University of California, San Francisco, CA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA
- Department of Neurobiology, Harvard Medical School, Boston, MA
- Ph.D. Program in Neuroscience, Harvard University, Boston, MA
| | | | - Miguel Turrero Garcia
- Department of Neurology, University of California, San Francisco, CA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA
| | - Fiona Dale-Huang
- Department of Neurology, University of California, San Francisco, CA
- Department of Neurological Surgery, University of California, San Francisco, CA
| | - Sarah M. Hanson
- Department of Neurology, University of California, San Francisco, CA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA
| | - Walter Mancia
- Department of Neurology, University of California, San Francisco, CA
- Department of Neurological Surgery, University of California, San Francisco, CA
| | - Jonathan Liu
- Chan Zuckerberg Biohub San Francisco, San Francisco, CA
| | - Manal Adam
- Department of Neurology, University of California, San Francisco, CA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA
| | - Olivia Mosto
- Department of Neurobiology, Harvard Medical School, Boston, MA
| | | | - Arturo Alvarez-Buylla
- Department of Neurology, University of California, San Francisco, CA
- Department of Neurological Surgery, University of California, San Francisco, CA
| | - Corey C. Harwell
- Department of Neurology, University of California, San Francisco, CA
- Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, San Francisco, CA
- Chan Zuckerberg Biohub San Francisco, San Francisco, CA
- Lead contact
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10
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Tomar M, Rodger J, Moretti J. Dorsal striatum c-Fos activity in perseverative ephrin-A2A5 -/- mice and the cellular effect of low-intensity rTMS. Front Neural Circuits 2023; 17:1179096. [PMID: 37396401 PMCID: PMC10311007 DOI: 10.3389/fncir.2023.1179096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/16/2023] [Indexed: 07/04/2023] Open
Abstract
Introduction Overreliance on habit is linked with disorders, such as drug addiction and obsessive-compulsive disorder, and there is increasing interest in the use of repetitive transcranial magnetic stimulation (rTMS) to alter neuronal activity in the relevant pathways and for therapeutic outcomes. In this study, we researched the brains of ephrin-A2A5-/- mice, which previously showed perseverative behavior in progressive-ratio tasks, associated with low cellular activity in the nucleus accumbens. We investigated whether rTMS treatment had altered the activity of the dorsal striatum in a way that suggested altered hierarchical recruitment of brain regions from the ventral striatum to the dorsal striatum, which is linked to abnormal habit formation. Methods Brain sections from a limited number of mice that underwent training and performance on a progressive ratio task with and without low-intensity rTMS (LI-rTMS) were taken from a previous study. We took advantage of the previous characterization of perseverative behavior to investigate the contribution of different neuronal subtypes and striatal regions within this limited sample. Striatal regions were stained for c-Fos as a correlate of neuronal activation for DARPP32 to identify medium spiny neurons (MSNs) and for GAD67 to identify GABA-ergic interneurons. Results and discussion Contrary to our hypothesis, we found that neuronal activity in ephrin-A2A5-/- mice still reflected the typical organization of goal-directed behavior. There was a significant difference in the proportion of neuronal activity across the striatum between experimental groups and control but no significant effects identifying a specific regional change. However, there was a significant group by treatment interaction which suggests that MSN activity is altered in the dorsomedial striatum and a trend suggesting that rTMS increases ephrin-A2A5-/- MSN activity in the DMS. Although preliminary and inconclusive, the analysis of this archival data suggests that investigating circuit-based changes in striatal regions may provide insight into chronic rTMS mechanisms that could be relevant to treating disorders associated with perseverative behavior.
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Affiliation(s)
- Maitri Tomar
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
- Brain Plasticity Lab, Perron Institute for Neurological and Translational Science, Nedlands, WA, Australia
| | - Jennifer Rodger
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
- Brain Plasticity Lab, Perron Institute for Neurological and Translational Science, Nedlands, WA, Australia
| | - Jessica Moretti
- School of Biological Sciences, University of Western Australia, Crawley, WA, Australia
- Brain Plasticity Lab, Perron Institute for Neurological and Translational Science, Nedlands, WA, Australia
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11
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He CH, Song NN, Xie PX, Wang YB, Chen JY, Huang Y, Hu L, Li Z, Su JH, Zhang XQ, Zhang L, Ding YQ. Overexpression of EphB6 and EphrinB2 controls soma spacing of cortical neurons in a mutual inhibitory way. Cell Death Dis 2023; 14:309. [PMID: 37149633 PMCID: PMC10164173 DOI: 10.1038/s41419-023-05825-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: 09/16/2022] [Revised: 04/12/2023] [Accepted: 04/21/2023] [Indexed: 05/08/2023]
Abstract
To establish functional circuitry, neurons settle down in a particular spatial domain by spacing their cell bodies, which requires proper positioning of the soma and establishing of a zone with unique connections. Deficits in this process are implicated in neurodevelopmental diseases. In this study, we examined the function of EphB6 in the development of cerebral cortex. Overexpression of EphB6 via in utero electroporation results in clumping of cortical neurons, while reducing its expression has no effect. In addition, overexpression of EphrinB2, a ligand of EphB6, also induces soma clumping in the cortex. Unexpectedly, the soma clumping phenotypes disappear when both of them are overexpressed in cortical neurons. The mutual inhibitory effect of EphB6/ EphrinB2 on preventing soma clumping is likely to be achieved via interaction of their specific domains. Thus, our results reveal a combinational role of EphrinB2/EphB6 overexpression in controlling soma spacing in cortical development.
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Affiliation(s)
- Chun-Hui He
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, and Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Ning-Ning Song
- Department of Laboratory Animal Science, Fudan University, Shanghai, 200032, China
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, 200032, China
| | - Pin-Xi Xie
- Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center) and Department of Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
- Clinical Center for Brain and Spinal Cord Research, Tongji University, Shanghai, 200092, China
| | - Yu-Bing Wang
- Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center) and Department of Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China
- Clinical Center for Brain and Spinal Cord Research, Tongji University, Shanghai, 200092, China
| | - Jia-Yin Chen
- Department of Laboratory Animal Science, Fudan University, Shanghai, 200032, China
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, 200032, China
| | - Ying Huang
- Department of Laboratory Animal Science, Fudan University, Shanghai, 200032, China
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, 200032, China
| | - Ling Hu
- Department of Laboratory Animal Science, Fudan University, Shanghai, 200032, China
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, 200032, China
| | - Zhao Li
- Department of Anesthesiology, Xiangya Hospital Central South University, Changsha, Hunan, 410008, China
| | - Jun-Hui Su
- Shanghai Tongji Hospital, Tongji University School of Medicine, Shanghai, 200092, China
| | - Xiao-Qing Zhang
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, and Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai, 200092, China
| | - Lei Zhang
- Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center) and Department of Anatomy, Histology and Embryology, Tongji University School of Medicine, Shanghai, 200092, China.
- Clinical Center for Brain and Spinal Cord Research, Tongji University, Shanghai, 200092, China.
| | - Yu-Qiang Ding
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, and Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai, 200092, China.
- Department of Laboratory Animal Science, Fudan University, Shanghai, 200032, China.
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, 200032, China.
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12
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Tomar M, Beros J, Meloni B, Rodger J. Interactions between Guidance Cues and Neuronal Activity: Therapeutic Insights from Mouse Models. Int J Mol Sci 2023; 24:ijms24086966. [PMID: 37108129 PMCID: PMC10138948 DOI: 10.3390/ijms24086966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 03/31/2023] [Accepted: 04/03/2023] [Indexed: 04/29/2023] Open
Abstract
Topographic mapping of neural circuits is fundamental in shaping the structural and functional organization of brain regions. This developmentally important process is crucial not only for the representation of different sensory inputs but also for their integration. Disruption of topographic organization has been associated with several neurodevelopmental disorders. The aim of this review is to highlight the mechanisms involved in creating and refining such well-defined maps in the brain with a focus on the Eph and ephrin families of axon guidance cues. We first describe the transgenic models where ephrin-A expression has been manipulated to understand the role of these guidance cues in defining topography in various sensory systems. We further describe the behavioral consequences of lacking ephrin-A guidance cues in these animal models. These studies have given us unexpected insight into how neuronal activity is equally important in refining neural circuits in different brain regions. We conclude the review by discussing studies that have used treatments such as repetitive transcranial magnetic stimulation (rTMS) to manipulate activity in the brain to compensate for the lack of guidance cues in ephrin-knockout animal models. We describe how rTMS could have therapeutic relevance in neurodevelopmental disorders with disrupted brain organization.
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Affiliation(s)
- Maitri Tomar
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Perron Institute for Neurological and Translational Science, Nedlands, WA 6009, Australia
| | - Jamie Beros
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Perron Institute for Neurological and Translational Science, Nedlands, WA 6009, Australia
| | - Bruno Meloni
- Perron Institute for Neurological and Translational Science, Nedlands, WA 6009, Australia
- Centre for Neuromuscular and Neurological Disorders, The University of Western Australia, Crawley, WA 6009, Australia
- Department of Neurosurgery, Sir Charles Gairdner Hospital, QEII Medical Centre, Nedlands, WA 6009, Australia
| | - Jennifer Rodger
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia
- Perron Institute for Neurological and Translational Science, Nedlands, WA 6009, Australia
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13
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Songco-Casey JO, Coffing GC, Piscopo DM, Pungor JR, Kern AD, Miller AC, Niell CM. Cell types and molecular architecture of the Octopus bimaculoides visual system. Curr Biol 2022; 32:5031-5044.e4. [PMID: 36318923 PMCID: PMC9815951 DOI: 10.1016/j.cub.2022.10.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 09/02/2022] [Accepted: 10/06/2022] [Indexed: 11/05/2022]
Abstract
Cephalopods have a remarkable visual system, with a camera-type eye and high acuity vision that they use for a wide range of sophisticated visually driven behaviors. However, the cephalopod brain is organized dramatically differently from that of vertebrates and invertebrates, and beyond neuroanatomical descriptions, little is known regarding the cell types and molecular determinants of their visual system organization. Here, we present a comprehensive single-cell molecular atlas of the octopus optic lobe, which is the primary visual processing structure in the cephalopod brain. We combined single-cell RNA sequencing with RNA fluorescence in situ hybridization to both identify putative molecular cell types and determine their anatomical and spatial organization within the optic lobe. Our results reveal six major neuronal cell classes identified by neurotransmitter/neuropeptide usage, in addition to non-neuronal and immature neuronal populations. We find that additional markers divide these neuronal classes into subtypes with distinct anatomical localizations, revealing further diversity and a detailed laminar organization within the optic lobe. We also delineate the immature neurons within this continuously growing tissue into subtypes defined by evolutionarily conserved developmental genes as well as novel cephalopod- and octopus-specific genes. Together, these findings outline the organizational logic of the octopus visual system, based on functional determinants, laminar identity, and developmental markers/pathways. The resulting atlas presented here details the "parts list" for neural circuits used for vision in octopus, providing a platform for investigations into the development and function of the octopus visual system as well as the evolution of visual processing.
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Affiliation(s)
| | - Gabrielle C Coffing
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, USA
| | - Denise M Piscopo
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| | - Judit R Pungor
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
| | - Andrew D Kern
- Institute of Ecology and Evolution, University of Oregon, Eugene, OR 97403, USA
| | - Adam C Miller
- Institute of Neuroscience, University of Oregon, Eugene, OR 97403, USA
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14
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Şen S, Erber R. Neuronal Guidance Molecules in Bone Remodeling and Orthodontic Tooth Movement. Int J Mol Sci 2022; 23:ijms231710077. [PMID: 36077474 PMCID: PMC9456342 DOI: 10.3390/ijms231710077] [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: 07/31/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/22/2022] Open
Abstract
During orthodontic tooth movement, mechanically induced remodeling occurs in the alveolar bone due to the action of orthodontic forces. The number of factors identified to be involved in mechanically induced bone remodeling is growing steadily. With the uncovering of the functions of neuronal guidance molecules (NGMs) for skeletal development as well as for bone homeostasis, NGMs are now also among the potentially significant factors for the regulation of bone remodeling during orthodontic tooth movement. This narrative review attempts to summarize the functions of NGMs in bone homeostasis and provides insight into the currently sparse literature on the functions of these molecules during orthodontic tooth movement. Presently, four families of NGMs are known: Netrins, Slits, Semaphorins, ephrins and Eph receptors. A search of electronic databases revealed roles in bone homeostasis for representatives from all four NGM families. Functions during orthodontic tooth movement, however, were only identified for Semaphorins, ephrins and Eph receptors. For these, crucial prerequisites for participation in the regulation of orthodontically induced bone remodeling, such as expression in cells of the periodontal ligament and in the alveolar bone, as well as mechanical inducibility, were shown, which suggests that the importance of NGMs in orthodontic tooth movement may be underappreciated to date and further research might be warranted.
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Affiliation(s)
- Sinan Şen
- Department of Orthodontics, University Medical Center Schleswig-Holstein, Campus Kiel, Christian Albrechts University, 24105 Kiel, Germany
- Correspondence: ; Tel.: +49-431-5002-6301
| | - Ralf Erber
- Department of Orthodontics and Dentofacial Orthopedics, University of Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany
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15
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Benevento M, Hökfelt T, Harkany T. Ontogenetic rules for the molecular diversification of hypothalamic neurons. Nat Rev Neurosci 2022; 23:611-627. [PMID: 35906427 DOI: 10.1038/s41583-022-00615-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/14/2022] [Indexed: 11/09/2022]
Abstract
The hypothalamus is an evolutionarily conserved endocrine interface that, among other roles, links central homeostatic control to adaptive bodily responses by releasing hormones and neuropeptides from its many neuronal subtypes. In its preoptic, anterior, tuberal and mammillary subdivisions, a kaleidoscope of magnocellular and parvocellular neuroendocrine command neurons, local-circuit neurons, and neurons that project to extrahypothalamic areas are intermingled in partially overlapping patches of nuclei. Molecular fingerprinting has produced data of unprecedented mass and depth to distinguish and even to predict the synaptic and endocrine competences, connectivity and stimulus selectivity of many neuronal modalities. These new insights support eminent studies from the past century but challenge others on the molecular rules that shape the developmental segregation of hypothalamic neuronal subtypes and their use of morphogenic cues for terminal differentiation. Here, we integrate single-cell RNA sequencing studies with those of mouse genetics and endocrinology to describe key stages of hypothalamus development, including local neurogenesis, the direct terminal differentiation of glutamatergic neurons, transition cascades for GABAergic and GABAergic cell-derived dopamine cells, waves of local neuronal migration, and sequential enrichment in neuropeptides and hormones. We particularly emphasize how transcription factors determine neuronal identity and, consequently, circuit architecture, and whether their deviations triggered by environmental factors and hormones provoke neuroendocrine illnesses.
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Affiliation(s)
- Marco Benevento
- Department of Molecular Neurosciences, Center for Brain Research, Medical University of Vienna, Vienna, Austria
| | - Tomas Hökfelt
- Department of Neuroscience, Biomedicum 7D, Karolinska Institutet, Solna, Sweden
| | - Tibor Harkany
- Department of Molecular Neurosciences, Center for Brain Research, Medical University of Vienna, Vienna, Austria. .,Department of Neuroscience, Biomedicum 7D, Karolinska Institutet, Solna, Sweden.
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16
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MINCER ST, NIETHAMER TK, TENG T, BUSH JO, PERCIVAL CJ. Investigating the effects of compound paralogous EPHB receptor mutations on mouse facial development. Dev Dyn 2022; 251:1138-1155. [PMID: 35025117 PMCID: PMC9924224 DOI: 10.1002/dvdy.454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 12/09/2021] [Accepted: 12/21/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Variation in facial shape may arise from the combinatorial or overlapping actions of paralogous genes. Given its many members, and overlapping expression and functions, the EPH receptor family is a compelling candidate source of craniofacial morphological variation. We performed a detailed morphometric analysis of an allelic series of E14.5 Ephb1-3 receptor mutants to determine the effect of each paralogous receptor gene on craniofacial morphology. RESULTS We found that Ephb1, Ephb2, and Ephb3 genotypes significantly influenced facial shape, but Ephb1 effects were weaker than Ephb2 and Ephb3 effects. Ephb2-/- and Ephb3-/- mutations affected similar aspects of facial morphology, but Ephb3-/- mutants had additional facial shape effects. Craniofacial differences across the allelic series were largely consistent with predicted additive genetic effects. However, we identified a potentially important nonadditive effect where Ephb1 mutants displayed different morphologies depending on the combination of other Ephb paralogs present, where Ephb1+/- , Ephb1-/- , and Ephb1-/- ; Ephb3-/- mutants exhibited a consistent deviation from their predicted facial shapes. CONCLUSIONS This study provides a detailed assessment of the effects of Ephb receptor gene paralogs on E14.5 mouse facial morphology and demonstrates how the loss of specific receptors contributes to facial dysmorphology.
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Affiliation(s)
- Sarah T. MINCER
- Interdepartmental Doctoral Program in Anthropological Sciences, Stony Brook University, Stony Brook, New York, United States of America
| | - Terren K. NIETHAMER
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America,Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America,Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America,Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, United States of America
| | - Teng TENG
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America,Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America,Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America,Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, United States of America
| | - Jeffrey O. BUSH
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America,Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America,Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America,Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, United States of America
| | - Christopher J. PERCIVAL
- Department of Anthropology, Stony Brook University, Stony Brook, New York, United States of America
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17
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Gillis RF, Palmour RM. mRNA expression analysis of the hippocampus in a vervet monkey model of fetal alcohol spectrum disorder. J Neurodev Disord 2022; 14:21. [PMID: 35305552 PMCID: PMC8934503 DOI: 10.1186/s11689-022-09427-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 02/10/2022] [Indexed: 11/12/2022] Open
Abstract
Background Fetal alcohol spectrum disorders (FASD) are common, yet preventable developmental disorders that stem from prenatal exposure to alcohol. This exposure leads to a wide array of behavioural and physical problems with a complex and poorly defined biological basis. Molecular investigations to date predominantly use rodent animal models, but because of genetic, developmental and social behavioral similarity, primate models are more relevant. We previously reported reduced cortical and hippocampal neuron levels in an Old World monkey (Chlorocebus sabaeus) model with ethanol exposure targeted to the period of rapid synaptogenesis and report here an initial molecular study of this model. The goal of this study was to evaluate mRNA expression of the hippocampus at two different behavioural stages (5 months, 2 years) corresponding to human infancy and early childhood. Methods Offspring of alcohol-preferring or control dams drank a maximum of 3.5 g ethanol per kg body weight or calorically matched sucrose solution 4 days per week during the last 2 months of gestation. Total mRNA expression was measured with the Affymetrix GeneChip Rhesus Macaque Genome Array in a 2 × 2 study design that interrogated two independent variables, age at sacrifice, and alcohol consumption during gestation. Results and discussion Statistical analysis identified a preferential downregulation of expression when interrogating the factor ‘alcohol’ with a balanced effect of upregulation vs. downregulation for the independent variable ‘age’. Functional exploration of both independent variables shows that the alcohol consumption factor generates broad functional annotation clusters that likely implicate a role for epigenetics in the observed differential expression, while the variable age reliably produced functional annotation clusters predominantly related to development. Furthermore, our data reveals a novel connection between EFNB1 and the FASDs; this is highly plausible both due to the role of EFNB1 in neuronal development as well as its central role in craniofrontal nasal syndrome (CFNS). Fold changes for key genes were subsequently confirmed via qRT-PCR. Conclusion Prenatal alcohol exposure leads to global downregulation in mRNA expression. The cellular interference model of EFNB1 provides a potential clue regarding how genetically susceptible individuals may develop the phenotypic triad generally associated with classic fetal alcohol syndrome. Supplementary Information The online version contains supplementary material available at 10.1186/s11689-022-09427-z.
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Honeycutt SE, N'Guetta PEY, O'Brien LL. Innervation in organogenesis. Curr Top Dev Biol 2022; 148:195-235. [PMID: 35461566 PMCID: PMC10636594 DOI: 10.1016/bs.ctdb.2022.02.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Proper innervation of peripheral organs helps to maintain physiological homeostasis and elicit responses to external stimuli. Disruptions to normal function can result in pathophysiological consequences. The establishment of connections and communication between the central nervous system and the peripheral organs is accomplished through the peripheral nervous system. Neuronal connections with target tissues arise from ganglia partitioned throughout the body. Organ innervation is initiated during development with stimuli being conducted through several types of neurons including sympathetic, parasympathetic, and sensory. While the physiological modulation of mature organs by these nerves is largely understood, their role in mammalian development is only beginning to be uncovered. Interactions with cells in target tissues can affect the development and eventual function of several organs, highlighting their significance. This chapter will cover the origin of peripheral neurons, factors mediating organ innervation, and the composition and function of organ-specific nerves during development. This emerging field aims to identify the functional contribution of innervation to development which will inform future investigations of normal and abnormal mammalian organogenesis, as well as contribute to regenerative and organ replacement efforts where nerve-derived signals may have significant implications for the advancement of such studies.
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Affiliation(s)
- Samuel E Honeycutt
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Pierre-Emmanuel Y N'Guetta
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Lori L O'Brien
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
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Poh EZ, Green C, Agostinelli L, Penrose-Menz M, Karl AK, Harvey AR, Rodger J. Manipulating the Level of Sensorimotor Stimulation during LI-rTMS Can Improve Visual Circuit Reorganisation in Adult Ephrin-A2A5 -/- Mice. Int J Mol Sci 2022; 23:ijms23052418. [PMID: 35269561 PMCID: PMC8910719 DOI: 10.3390/ijms23052418] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 11/16/2022] Open
Abstract
Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive brain stimulation technique that has the potential to treat a variety of neurologic and psychiatric disorders. The extent of rTMS-induced neuroplasticity may be dependent on a subject's brain state at the time of stimulation. Chronic low intensity rTMS (LI-rTMS) has previously been shown to induce beneficial structural and functional reorganisation within the abnormal visual circuits of ephrin-A2A5-/- mice in ambient lighting. Here, we administered chronic LI-rTMS in adult ephrin-A2A5-/- mice either in a dark environment or concurrently with voluntary locomotion. One day after the last stimulation session, optokinetic responses were assessed and fluorescent tracers were injected to map corticotectal and geniculocortical projections. We found that LI-rTMS in either treatment condition refined the geniculocortical map. Corticotectal projections were improved in locomotion+LI-rTMS subjects, but not in dark + LI-rTMS and sham groups. Visuomotor behaviour was not improved in any condition. Our results suggest that the beneficial reorganisation of abnormal visual circuits by rTMS can be significantly influenced by simultaneous, ambient visual input and is enhanced by concomitant physical exercise. Furthermore, the observed pathway-specific effects suggest that regional molecular changes and/or the relative proximity of terminals to the induced electric fields influence the outcomes of LI-rTMS on abnormal circuitry.
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Affiliation(s)
- Eugenia Z. Poh
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (E.Z.P.); (M.P.-M.); (A.-K.K.)
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (C.G.); (L.A.); (A.R.H.)
- Perron Institute for Neurological and Translational Research, 8 Verdun St, Nedlands, WA 6009, Australia
- Netherlands Institute for Neuroscience, Royal Netherlands Academy of Arts and Sciences, 1105 BA Amsterdam, The Netherlands
| | - Courtney Green
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (C.G.); (L.A.); (A.R.H.)
| | - Luca Agostinelli
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (C.G.); (L.A.); (A.R.H.)
| | - Marissa Penrose-Menz
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (E.Z.P.); (M.P.-M.); (A.-K.K.)
| | - Ann-Kathrin Karl
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (E.Z.P.); (M.P.-M.); (A.-K.K.)
- Department of Neurology, University Hospital of Würzburg, Josef-Schneider-Strasse 11, 97080 Würzburg, Germany
| | - Alan R. Harvey
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (C.G.); (L.A.); (A.R.H.)
- Perron Institute for Neurological and Translational Research, 8 Verdun St, Nedlands, WA 6009, Australia
| | - Jennifer Rodger
- School of Biological Sciences, The University of Western Australia, Crawley, WA 6009, Australia; (E.Z.P.); (M.P.-M.); (A.-K.K.)
- Perron Institute for Neurological and Translational Research, 8 Verdun St, Nedlands, WA 6009, Australia
- Correspondence: ; Tel.: +61-8-6488-2245
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20
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Sharma A, Johnson KB, Bie B, Rhoades EE, Sen A, Kida Y, Hockings J, Gatta A, Davenport J, Arcangelini C, Ritzu J, DeVecchio J, Hughen R, Wei M, Thomas Budd G, Lynn Henry N, Eng C, Foss J, Rotroff DM. A Multimodal Approach to Discover Biomarkers for Taxane-Induced Peripheral Neuropathy (TIPN): A Study Protocol. Technol Cancer Res Treat 2022; 21:15330338221127169. [PMID: 36172750 PMCID: PMC9523841 DOI: 10.1177/15330338221127169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Introduction: Taxanes are a class of chemotherapeutics commonly used to treat various solid tumors, including breast and ovarian cancers. Taxane-induced peripheral neuropathy (TIPN) occurs in up to 70% of patients, impacting quality of life both during and after treatment. TIPN typically manifests as tingling and numbness in the hands and feet and can cause irreversible loss of function of peripheral nerves. TIPN can be dose-limiting, potentially impacting clinical outcomes. The mechanisms underlying TIPN are poorly understood. As such, there are limited treatment options and no tools to provide early detection of those who will develop TIPN. Although some patients may have a genetic predisposition, genetic biomarkers have been inconsistent in predicting chemotherapy-induced peripheral neuropathy (CIPN). Moreover, other molecular markers (eg, metabolites, mRNA, miRNA, proteins) may be informative for predicting CIPN, but remain largely unexplored. We anticipate that combinations of multiple biomarkers will be required to consistently predict those who will develop TIPN. Methods: To address this clinical gap of identifying patients at risk of TIPN, we initiated the Genetics and Inflammatory Markers for CIPN (GENIE) study. This longitudinal multicenter observational study uses a novel, multimodal approach to evaluate genomic variation, metabolites, DNA methylation, gene expression, and circulating cytokines/chemokines prior to, during, and after taxane treatment in 400 patients with breast cancer. Molecular and patient reported data will be collected prior to, during, and after taxane therapy. Multi-modal data will be used to develop a set of comprehensive predictive biomarker signatures of TIPN. Conclusion: The goal of this study is to enable early detection of patients at risk of developing TIPN, provide a tool to modify taxane treatment to minimize morbidity from TIPN, and improved patient quality of life. Here we provide a brief review of the current state of research into CIPN and TIPN and introduce the GENIE study design.
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Affiliation(s)
- Anukriti Sharma
- Department of Quantitative Health Sciences, 22516Lerner Research Institute, Cleveland Clinic, OH, USA
| | - Ken B Johnson
- Department of Anesthesiology, 14434University of Utah, UT, USA
| | - Bihua Bie
- Department of Anesthesiology, 2569Cleveland Clinic, OH, USA
| | | | - Alper Sen
- Department of Anesthesiology, 14434University of Utah, UT, USA
| | - Yuri Kida
- Department of Anesthesiology, 14434University of Utah, UT, USA
| | - Jennifer Hockings
- Genomic Medicine Institute, Lerner Research Institute, 196246Cleveland Clinic, OH, USA.,Department of Pharmacy, 2569Cleveland Clinic, OH, USA.,196246Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Alycia Gatta
- 170292Taussig Cancer Institute, Cleveland Clinic, OH, USA
| | | | | | - Jennifer Ritzu
- 170292Taussig Cancer Institute, Cleveland Clinic, OH, USA
| | - Jennifer DeVecchio
- Genomic Medicine Institute, Lerner Research Institute, 196246Cleveland Clinic, OH, USA
| | - Ron Hughen
- Department of Anesthesiology, 14434University of Utah, UT, USA
| | - Mei Wei
- 20270Huntsman Cancer Institute, University of Utah, Salt Lake City, UT
| | - G Thomas Budd
- 170292Taussig Cancer Institute, Cleveland Clinic, OH, USA.,196246Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH, USA.,Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - N Lynn Henry
- 67159University of Michigan Rogel Cancer Center, Ann Arbor, MI, USA
| | - Charis Eng
- 170292Taussig Cancer Institute, Cleveland Clinic, OH, USA.,Genomic Medicine Institute, Lerner Research Institute, 196246Cleveland Clinic, OH, USA.,196246Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH, USA.,Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, OH, USA.,Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Joseph Foss
- Department of Anesthesiology, 2569Cleveland Clinic, OH, USA
| | - Daniel M Rotroff
- Department of Quantitative Health Sciences, 22516Lerner Research Institute, Cleveland Clinic, OH, USA.,196246Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland, OH, USA.,Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, OH, USA.,Endocrinology and Metabolism Institute, Cleveland Clinic, Cleveland, OH, USA
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21
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Altered cell and RNA isoform diversity in aging Down syndrome brains. Proc Natl Acad Sci U S A 2021; 118:2114326118. [PMID: 34795060 PMCID: PMC8617492 DOI: 10.1073/pnas.2114326118] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/08/2021] [Indexed: 12/11/2022] Open
Abstract
Down syndrome (DS) neurocognitive disabilities associated with trisomy 21 are known; however, gene changes within individual brain cells occurring with age are unknown. Here, we interrogated >170,000 cells from 29 aging DS and control brains using single-nucleus RNA sequencing. We observed increases in inhibitory-over-excitatory neurons, microglial activation in the youngest DS brains coinciding with overexpression of genes associated with microglial-mediated synaptic pruning, and overexpression of the chromosome 21 gene RUNX1 that may be a potential driving factor in microglial activation. Single-nucleus long-read sequencing revealed hundreds of thousands of unannotated RNA transcripts. These included diverse species for the Alzheimer’s disease gene—amyloid precursor protein—that contained intra-exonic junctions previously associated with somatic gene recombination, which was also identified in ∼8,000 other genes. Down syndrome (DS), trisomy of human chromosome 21 (HSA21), is characterized by lifelong cognitive impairments and the development of the neuropathological hallmarks of Alzheimer’s disease (AD). The cellular and molecular modifications responsible for these effects are not understood. Here we performed single-nucleus RNA sequencing (snRNA-seq) employing both short- (Illumina) and long-read (Pacific Biosciences) sequencing technologies on a total of 29 DS and non-DS control prefrontal cortex samples. In DS, the ratio of inhibitory-to-excitatory neurons was significantly increased, which was not observed in previous reports examining sporadic AD. DS microglial transcriptomes displayed AD-related aging and activation signatures in advance of AD neuropathology, with increased microglial expression of C1q complement genes (associated with dendritic pruning) and the HSA21 transcription factor gene RUNX1. Long-read sequencing detected vast RNA isoform diversity within and among specific cell types, including numerous sequences that differed between DS and control brains. Notably, over 8,000 genes produced RNAs containing intra-exonic junctions, including amyloid precursor protein (APP) that had previously been associated with somatic gene recombination. These and related results illuminate large-scale cellular and transcriptomic alterations as features of the aging DS brain.
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22
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Motz CT, Kabat V, Saxena T, Bellamkonda RV, Zhu C. Neuromechanobiology: An Expanding Field Driven by the Force of Greater Focus. Adv Healthc Mater 2021; 10:e2100102. [PMID: 34342167 PMCID: PMC8497434 DOI: 10.1002/adhm.202100102] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 07/06/2021] [Indexed: 12/14/2022]
Abstract
The brain processes information by transmitting signals through highly connected and dynamic networks of neurons. Neurons use specific cellular structures, including axons, dendrites and synapses, and specific molecules, including cell adhesion molecules, ion channels and chemical receptors to form, maintain and communicate among cells in the networks. These cellular and molecular processes take place in environments rich of mechanical cues, thus offering ample opportunities for mechanical regulation of neural development and function. Recent studies have suggested the importance of mechanical cues and their potential regulatory roles in the development and maintenance of these neuronal structures. Also suggested are the importance of mechanical cues and their potential regulatory roles in the interaction and function of molecules mediating the interneuronal communications. In this review, the current understanding is integrated and promising future directions of neuromechanobiology are suggested at the cellular and molecular levels. Several neuronal processes where mechanics likely plays a role are examined and how forces affect ligand binding, conformational change, and signal induction of molecules key to these neuronal processes are indicated, especially at the synapse. The disease relevance of neuromechanobiology as well as therapies and engineering solutions to neurological disorders stemmed from this emergent field of study are also discussed.
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Affiliation(s)
- Cara T Motz
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0363, USA
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332-0363, USA
| | - Victoria Kabat
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0363, USA
| | - Tarun Saxena
- Department of Biomedical Engineering, Duke University, Durham, NC, 27709, USA
| | - Ravi V Bellamkonda
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, 27708, USA
| | - Cheng Zhu
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0363, USA
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332-0363, USA
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0363, USA
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23
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Xu Y, Robev D, Saha N, Wang B, Dalva MB, Xu K, Himanen JP, Nikolov DB. The Ephb2 Receptor Uses Homotypic, Head-to-Tail Interactions within Its Ectodomain as an Autoinhibitory Control Mechanism. Int J Mol Sci 2021; 22:10473. [PMID: 34638814 PMCID: PMC8508685 DOI: 10.3390/ijms221910473] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/17/2021] [Accepted: 09/23/2021] [Indexed: 11/16/2022] Open
Abstract
The Eph receptor tyrosine kinases and their ephrin ligands direct axon pathfinding and neuronal cell migration, as well as mediate many other cell-cell communication events. Their dysfunctional signaling has been shown to lead to various diseases, including cancer. The Ephs and ephrins both localize to the plasma membrane and, upon cell-cell contact, form extensive signaling assemblies at the contact sites. The Ephs and the ephrins are divided into A and B subclasses based on their sequence conservation and affinities for each other. The molecular details of Eph-ephrin recognition have been previously revealed and it has been documented that ephrin binding induces higher-order Eph assemblies, which are essential for full biological activity, via multiple, distinct Eph-Eph interfaces. One Eph-Eph interface type is characterized by a homotypic, head-to-tail interaction between the ligand-binding and the fibronectin domains of two adjacent Eph molecules. While the previous Eph ectodomain structural studies were focused on A class receptors, we now report the crystal structure of the full ectodomain of EphB2, revealing distinct and unique head-to-tail receptor-receptor interactions. The EphB2 structure and structure-based mutagenesis document that EphB2 uses the head-to-tail interactions as a novel autoinhibitory control mechanism for regulating downstream signaling and that these interactions can be modulated by posttranslational modifications.
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Affiliation(s)
- Yan Xu
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA; (Y.X.); (K.X.)
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; (D.R.); (N.S.)
| | - Dorothea Robev
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; (D.R.); (N.S.)
| | - Nayanendu Saha
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; (D.R.); (N.S.)
| | - Bingcheng Wang
- Rammelkamp Center for Research, MetroHealth Medical Center, 2500 MetroHealth Drive, Cleveland, OH 44109, USA;
| | - Matthew B. Dalva
- Department of Neuroscience and Jefferson Center for Synaptic Biology, Thomas Jefferson University, 233 South 10th Street, Bluemle Life Sciences Building, Room 324, Philadelphia, PA 19107, USA;
| | - Kai Xu
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA; (Y.X.); (K.X.)
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; (D.R.); (N.S.)
| | - Juha P. Himanen
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; (D.R.); (N.S.)
| | - Dimitar B. Nikolov
- Structural Biology Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA; (D.R.); (N.S.)
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24
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He CH, Zhang L, Song NN, Mei WY, Chen JY, Hu L, Zhang Q, Wang YB, Ding YQ. Satb2 Regulates EphA7 to Control Soma Spacing and Self-Avoidance of Cortical Pyramidal Neurons. Cereb Cortex 2021; 32:2321-2331. [PMID: 34546353 DOI: 10.1093/cercor/bhab321] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Soma spacing and dendritic arborization during brain development are key events for the establishment of proper neural circuitry and function. Transcription factor Satb2 is a molecular node in regulating the development of the cerebral cortex, as shown by the facts that Satb2 is required for the regionalization of retrosplenial cortex, the determination of callosal neuron fate, and the regulation of soma spacing and dendritic self-avoidance of cortical pyramidal neurons. In this study, we explored downstream effectors that mediate the Satb2-implicated soma spacing and dendritic self-avoidance. First, RNA-seq analysis of the cortex revealed differentially expressed genes between control and Satb2 CKO mice. Among them, EphA7 transcription was dramatically increased in layers II/III of Satb2 CKO cortex. Overexpression of EphA7 in the late-born cortical neurons of wild-type mice via in utero electroporation resulted in soma clumping and impaired self-avoidance of affected pyramidal neurons, which resembles the phenotypes caused by knockdown of Satb2 expression. Importantly, the phenotypes by Satb2 knockdown was rescued by reducing EphA7 expression in the cortex. Finally, ChIP and luciferase reporter assays indicated a direct suppression of EphA7 expression by Satb2. These findings provide new insights into the complexity of transcriptional regulation of the morphogenesis of cerebral cortex.
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Affiliation(s)
- Chun-Hui He
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Lei Zhang
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Ning-Ning Song
- Department of Laboratory Animal Science, Fudan University, Shanghai 200032, China.,State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Wan-Ying Mei
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Jia-Yin Chen
- Department of Laboratory Animal Science, Fudan University, Shanghai 200032, China.,State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Ling Hu
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Qiong Zhang
- Department of Laboratory Animal Science, Fudan University, Shanghai 200032, China.,State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
| | - Yu-Bing Wang
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Yu-Qiang Ding
- Key Laboratory of Arrhythmias, Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China.,Department of Anatomy and Neurobiology, Tongji University School of Medicine, Shanghai 200092, China.,Department of Laboratory Animal Science, Fudan University, Shanghai 200032, China.,State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai 200032, China
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25
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Characterising the shared genetic determinants of bipolar disorder, schizophrenia and risk-taking. Transl Psychiatry 2021; 11:466. [PMID: 34497263 PMCID: PMC8426401 DOI: 10.1038/s41398-021-01576-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 07/19/2021] [Accepted: 08/18/2021] [Indexed: 02/08/2023] Open
Abstract
Increased risk-taking is a central component of bipolar disorder (BIP) and is implicated in schizophrenia (SCZ). Risky behaviours, including smoking and alcohol use, are overrepresented in both disorders and associated with poor health outcomes. Positive genetic correlations are reported but an improved understanding of the shared genetic architecture between risk phenotypes and psychiatric disorders may provide insights into underlying neurobiological mechanisms. We aimed to characterise the genetic overlap between risk phenotypes and SCZ, and BIP by estimating the total number of shared variants using the bivariate causal mixture model and identifying shared genomic loci using the conjunctional false discovery rate method. Summary statistics from genome wide association studies of SCZ, BIP, risk-taking and risky behaviours were acquired (n = 82,315-466,751). Genomic loci were functionally annotated using FUMA. Of 8.6-8.7 K variants predicted to influence BIP, 6.6 K and 7.4 K were predicted to influence risk-taking and risky behaviours, respectively. Similarly, of 10.2-10.3 K variants influencing SCZ, 9.6 and 8.8 K were predicted to influence risk-taking and risky behaviours, respectively. We identified 192 loci jointly associated with SCZ and risk phenotypes and 206 associated with BIP and risk phenotypes, of which 68 were common to both risk-taking and risky behaviours and 124 were novel to SCZ or BIP. Functional annotation implicated differential expression in multiple cortical and sub-cortical regions. In conclusion, we report extensive polygenic overlap between risk phenotypes and BIP and SCZ, identify specific loci contributing to this shared risk and highlight biologically plausible mechanisms that may underlie risk-taking in severe psychiatric disorders.
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26
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Francia S, Lodovichi C. The role of the odorant receptors in the formation of the sensory map. BMC Biol 2021; 19:174. [PMID: 34452614 PMCID: PMC8394594 DOI: 10.1186/s12915-021-01116-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 08/02/2021] [Indexed: 11/10/2022] Open
Abstract
In the olfactory system, odorant receptors (ORs) expressed at the cell membrane of olfactory sensory neurons detect odorants and direct sensory axons toward precise target locations in the brain, reflected in the presence of olfactory sensory maps. This dual role of ORs is corroborated by their subcellular expression both in cilia, where they bind odorants, and at axon terminals, a location suitable for axon guidance cues. Here, we provide an overview and discuss previous work on the role of ORs in establishing the topographic organization of the olfactory system and recent findings on the mechanisms of activation and function of axonal ORs.
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Affiliation(s)
- Simona Francia
- Center for Synaptic Neuroscience and Technology, Istituto Italiano di Tecnologia, Genoa, Italy.,Veneto Institute of Molecular Medicine, Padua, Italy
| | - Claudia Lodovichi
- Veneto Institute of Molecular Medicine, Padua, Italy. .,Neuroscience Institute CNR, Via Orus 2, 35129, Padua, Italy. .,Department of Biomedical Sciences, University of Padua, Padua, Italy. .,Padova Neuroscience Center, Padua, Italy.
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27
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Chico TJA, Kugler EC. Cerebrovascular development: mechanisms and experimental approaches. Cell Mol Life Sci 2021; 78:4377-4398. [PMID: 33688979 PMCID: PMC8164590 DOI: 10.1007/s00018-021-03790-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 02/04/2021] [Accepted: 02/12/2021] [Indexed: 12/13/2022]
Abstract
The cerebral vasculature plays a central role in human health and disease and possesses several unique anatomic, functional and molecular characteristics. Despite their importance, the mechanisms that determine cerebrovascular development are less well studied than other vascular territories. This is in part due to limitations of existing models and techniques for visualisation and manipulation of the cerebral vasculature. In this review we summarise the experimental approaches used to study the cerebral vessels and the mechanisms that contribute to their development.
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Affiliation(s)
- Timothy J A Chico
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK.
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
- Insigneo Institute for in Silico Medicine, The Pam Liversidge Building, Sheffield, S1 3JD, UK.
| | - Elisabeth C Kugler
- Department of Infection, Immunity and Cardiovascular Disease, Medical School, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, UK.
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, S10 2TN, UK.
- Insigneo Institute for in Silico Medicine, The Pam Liversidge Building, Sheffield, S1 3JD, UK.
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28
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Blockade of Erythropoietin-Producing Human Hepatocellular Carcinoma Receptor B1 in Spinal Dorsal Horn Alleviates Visceral Pain in Rats. Pain Res Manag 2021; 2021:7582494. [PMID: 33880135 PMCID: PMC8046573 DOI: 10.1155/2021/7582494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 02/19/2021] [Accepted: 03/10/2021] [Indexed: 11/24/2022]
Abstract
Objective This experiment was designed to determine whether erythropoietin-producing human hepatocellular carcinoma (Eph) receptors were involved in the development of visceral pain. Methods Adult male Sprague-Dawley rats were randomly divided into three groups receiving different treatments (n = 16 per group): intracolonic vehicle (control group), intracolonic 2, 4, 6-trinitrobenzene sulfonic acid (TNBS) (TNBS group), and intracolonic TNBS and intrathecal EphB1 receptor blocking reagent (TNBS + EphB2-Fc group). Visceral hyperalgesia was evaluated with quantification of visceral pain threshold induced by colorectal distention. The spinal expressions of EphB1 and ephrinB2 and levels of their phosphorylated forms (p-EphB1 and p-ephrinB2) were assessed by Western blotting and immunohistochemistry. Results The TNBS-treated rats developed significant visceral hyperalgesia. The spinal expressions of EphB1, p-EphB1, ephrinB2, and p-ephrinB2 were significantly increased in the TNBS group compared with the control group, but visceral hyperalgesia and elevation of spinal EphB1 and p-EphB1 expressions were evidently alleviated by intrathecal administration of EphB2-Fc in the TNBS + EphB2-Fc group. The number of EphB1- and p-EphB1-immunopositive cells, the average optical (AO) value of EphB1, and its phosphorylated form in the spinal dorsal horn were significantly increased in the TNBS group than in the control group, but they were obviously reduced by intrathecal administration of EphB2-Fc. There were no significant differences in the number of ephrinB2- and p-ephrinB2-immunopositive cells and the AO value of ephrinB2 and its phosphorylated form between the TNBS and TNBS + EphB2-Fc groups. Conclusion EphB1 receptors in the spinal dorsal horn play a pivotal role in the development of visceral pain and may be considered as a potential target for the treatment of visceral pain.
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Stinson JPC, Brett CA, Carroll JB, Gabriele ML. Registry of Compartmental Ephrin-B3 Guidance Patterns With Respect to Emerging Multimodal Midbrain Maps. Front Neuroanat 2021; 15:649478. [PMID: 33815071 PMCID: PMC8010652 DOI: 10.3389/fnana.2021.649478] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 02/23/2021] [Indexed: 11/16/2022] Open
Abstract
Guidance errors and unrefined neural map configurations appear linked to certain neurodevelopmental conditions, including autism spectrum disorders. Deficits in specific multisensory tasks that require midbrain processing are highly predictive of cognitive and behavioral phenotypes associated with such syndromes. The lateral cortex of the inferior colliculus (LCIC) is a shell region of the mesencephalon that integrates converging information from multiple levels and modalities. Mature LCIC sensory maps are discretely-organized, mimicking its compartmental micro-organization. Intermittent modular domains receive patchy somatosensory connections, while inputs of auditory origin terminate in the encompassing extramodular matrix.Eph-ephrin signaling mechanisms instruct comparable topographic arrangements in a variety of other systems. Whether Eph-ephrin interactions also govern the assembly of LCIC multimodal maps remains unaddressed. Previously, we identified EphA4 and ephrin-B2 as key mediators, with overlapping expression patterns that align with emerging LCIC modules. Here, we implicate another member of this guidance family, ephrin-B3, and quantify its transient expression with respect to neurochemically-defined LCIC compartments. Multiple-labeling studies in GAD67-GFP knock-in mice reveal extramodular ephrin-B3 expression, complementary to that of EphA4 and ephrin-B2. This distinctive pattern sharpens over the early postnatal period (birth to P8), prior to ephrin-B3 downregulation once multimodal LCIC inputs are largely segregated (P12). Channel-specific sampling of LCIC ROIs show ephrin-B3 signal periodicities that are out-of-phase with glutamic acid decarboxylase (GAD;modular marker) signal fluctuations, and match calretinin (CR) waveforms (matrix marker). Taken together, the guidance mosaic registry with emerging LCIC compartments and its interfacing afferent streams suggest a prominent role for Eph-ephrins in ordering behaviorally significant multisensory midbrain networks.
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Affiliation(s)
- Jeremiah P C Stinson
- Department of Biology, James Madison University, Harrisonburg, VA, United States
| | - Cooper A Brett
- Department of Biology, James Madison University, Harrisonburg, VA, United States
| | - Julianne B Carroll
- Department of Biology, James Madison University, Harrisonburg, VA, United States
| | - Mark L Gabriele
- Department of Biology, James Madison University, Harrisonburg, VA, United States
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30
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Grossemy S, Chan PPY, Doran PM. Enhanced Neural Differentiation Using Simultaneous Application of 3D Scaffold Culture, Fluid Flow, and Electrical Stimulation in Bioreactors. Adv Biol (Weinh) 2021; 5:e2000136. [PMID: 33852182 DOI: 10.1002/adbi.202000136] [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: 05/21/2020] [Revised: 01/25/2021] [Indexed: 12/22/2022]
Abstract
Neural differentiation is studied using a simultaneous application of 3D scaffold culture and hydrodynamic and electrical stimuli in purpose-designed recirculation bioreactors operated with continuous fluid flow. Pheochromocytoma (PC12) cells are seeded into nonwoven microfibrous viscose-rayon scaffolds functionalized with poly-l-lysine and laminin. Compared with the results from static control cultures with and without electrical stimulation and bioreactor cultures with the fluid flow without electrical stimulation, expression levels of the differentiation markers β3-tubulin, shootin1, and ephrin type-A receptor 2 are greatest when cells are cultured in bioreactors with fluid flow combined with in-situ electrical stimulus. Immunocytochemical assessment of neurite development and morphology within the scaffolds confirm the beneficial effects of exposing the cells to concurrent hydrodynamic and electrical treatments. Under the conditions tested, electrical stimulation by itself produces more pronounced levels of cell differentiation than fluid flow alone; however, significant additional improvements in differentiation are achieved by combining these treatments. Fluid flow and electrical stimuli exert independent and noninteractive effects on cellular differentiation, suggesting that interference between the mechanisms of differentiation enhancement by these two treatments is minimal during their simultaneous application. This work demonstrates the beneficial effects of combining several different potent physical environmental stimuli in cell culture systems to promote neurogenesis.
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Affiliation(s)
- Simon Grossemy
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Melbourne, VIC 3122, Australia
| | - Peggy P Y Chan
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Melbourne, VIC 3122, Australia
| | - Pauline M Doran
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Melbourne, VIC 3122, Australia
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31
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Tilak M, Holborn J, New LA, Lalonde J, Jones N. Receptor Tyrosine Kinase Signaling and Targeting in Glioblastoma Multiforme. Int J Mol Sci 2021; 22:1831. [PMID: 33673213 PMCID: PMC7918566 DOI: 10.3390/ijms22041831] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/20/2022] Open
Abstract
Glioblastoma multiforme (GBM) is amongst the deadliest of human cancers, with a median survival rate of just over one year following diagnosis. Characterized by rapid proliferation and diffuse infiltration into the brain, GBM is notoriously difficult to treat, with tumor cells showing limited response to existing therapies and eventually developing resistance to these interventions. As such, there is intense interest in better understanding the molecular alterations in GBM to guide the development of more efficient targeted therapies. GBM tumors can be classified into several molecular subtypes which have distinct genetic signatures, and they show aberrant activation of numerous signal transduction pathways, particularly those connected to receptor tyrosine kinases (RTKs) which control glioma cell growth, survival, migration, invasion, and angiogenesis. There are also non-canonical modes of RTK signaling found in GBM, which involve G-protein-coupled receptors and calcium channels. This review uses The Cancer Genome Atlas (TCGA) GBM dataset in combination with a data-mining approach to summarize disease characteristics, with a focus on select molecular pathways that drive GBM pathogenesis. We also present a unique genomic survey of RTKs that are frequently altered in GBM subtypes, as well as catalog the GBM disease association scores for all RTKs. Lastly, we discuss current RTK targeted therapies and highlight emerging directions in GBM research.
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Affiliation(s)
| | | | | | | | - Nina Jones
- Department of Molecular and Cellular Biology, University of Guelph, Guelph, ON N1G 2W1, Canada; (M.T.); (J.H.); (L.A.N.); (J.L.)
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32
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He S, Ouyang S, Li X, Ma B. Inhibition of laser induced rats choroidal neovascularization by intravitreous injection of sEphB4-HSA. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:18. [PMID: 33553311 PMCID: PMC7859820 DOI: 10.21037/atm-20-3810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Background Choroidal neovascularization (CNV) is a leading cause of central vision loss complicated with age-related macular degeneration. Although intravitreal anti-VEGF therapy is widely used in wet age-related macular degeneration, optimal treatment regimens for the disease are still under investigation. EphrinB2 and EphB4 regulate angiogenesis, and interruption of EphB4/ephrinB2 has been demonstrated to inhibit angiogenesis. In the current study, we studied the effects of soluble EphB4 (sEphB4) on laser induced CNV in a rat model by intravitreous injection and the underlying mechanism. Methods Male rats (Brown-Norway) were used in the study. CNV was induced by laser and the sEphB4 was injected intravitreous after laser at days 3 and 7. The CNV lesions were evaluated by three methods: fluorescein angiography (FA) in vivo, CNV volume by confocal analysis of choroidal flat-mounts and H&E staining. The expression of fibronectin (FN), VEGFR-2, phospho-VEGFR-2 (pVEGFR-2), the double labeling of EphB4 with FN was analyzed by immunofluorescence. The interaction of FN with EphB4 and the effects of intraocular injection of sEphB4 on the inhibition of pVEGFR-2 were determined by western blot. Results The FA leakage and CNV volume were significantly inhibited by the injection of the sEphB4. Further, histology analysis showed that CNV lesion was significantly smaller in the rats with sEphB4 injection than rats with placebo application. The expressions of pVEGFR-2 and FN in the CNV lesions were reduced compared with controls. Conclusions Our study suggests that the inhibition of CNV by sEphB4 may be through suppression of VEGFR-2 phosphorylation and the expression of FN. sEphB4 may be a new potential therapeutic strategy of CNV.
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Affiliation(s)
- Shikun He
- Department of Pathology and USC Roski Eye Institute, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Sha Ouyang
- Department of Pathology and USC Roski Eye Institute, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA.,Department of Ophthalmology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Xiaohua Li
- Department of Ophthalmology, Henan Provincial People's Hospital, Zhengzhou, China.,Department of Ophthalmology, Henan Eye Hospital, Zhengzhou, China
| | - Binyun Ma
- Department of Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
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33
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The genomic basis of mood instability: identification of 46 loci in 363,705 UK Biobank participants, genetic correlation with psychiatric disorders, and association with gene expression and function. Mol Psychiatry 2020; 25:3091-3099. [PMID: 31168069 PMCID: PMC7116257 DOI: 10.1038/s41380-019-0439-8] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/03/2019] [Accepted: 04/29/2019] [Indexed: 01/01/2023]
Abstract
Genome-wide association studies (GWAS) of psychiatric phenotypes have tended to focus on categorical diagnoses, but to understand the biology of mental illness it may be more useful to study traits which cut across traditional boundaries. Here, we report the results of a GWAS of mood instability as a trait in a large population cohort (UK Biobank, n = 363,705). We also assess the clinical and biological relevance of the findings, including whether genetic associations show enrichment for nervous system pathways. Forty six unique loci associated with mood instability were identified with a SNP heritability estimate of 9%. Linkage Disequilibrium Score Regression (LDSR) analyses identified genetic correlations with Major Depressive Disorder (MDD), Bipolar Disorder (BD), Schizophrenia, anxiety, and Post Traumatic Stress Disorder (PTSD). Gene-level and gene set analyses identified 244 significant genes and 6 enriched gene sets. Tissue expression analysis of the SNP-level data found enrichment in multiple brain regions, and eQTL analyses highlighted an inversion on chromosome 17 plus two brain-specific eQTLs. In addition, we used a Phenotype Linkage Network (PLN) analysis and community analysis to assess for enrichment of nervous system gene sets using mouse orthologue databases. The PLN analysis found enrichment in nervous system PLNs for a community containing serotonin and melatonin receptors. In summary, this work has identified novel loci, tissues and gene sets contributing to mood instability. These findings may be relevant for the identification of novel trans-diagnostic drug targets and could help to inform future stratified medicine innovations in mental health.
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34
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Méndez-Maldonado K, Vega-López GA, Aybar MJ, Velasco I. Neurogenesis From Neural Crest Cells: Molecular Mechanisms in the Formation of Cranial Nerves and Ganglia. Front Cell Dev Biol 2020; 8:635. [PMID: 32850790 PMCID: PMC7427511 DOI: 10.3389/fcell.2020.00635] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 06/24/2020] [Indexed: 12/15/2022] Open
Abstract
The neural crest (NC) is a transient multipotent cell population that originates in the dorsal neural tube. Cells of the NC are highly migratory, as they travel considerable distances through the body to reach their final sites. Derivatives of the NC are neurons and glia of the peripheral nervous system (PNS) and the enteric nervous system as well as non-neural cells. Different signaling pathways triggered by Bone Morphogenetic Proteins (BMPs), Fibroblast Growth Factors (FGFs), Wnt proteins, Notch ligands, retinoic acid (RA), and Receptor Tyrosine Kinases (RTKs) participate in the processes of induction, specification, cell migration and neural differentiation of the NC. A specific set of signaling pathways and transcription factors are initially expressed in the neural plate border and then in the NC cell precursors to the formation of cranial nerves. The molecular mechanisms of control during embryonic development have been gradually elucidated, pointing to an important role of transcriptional regulators when neural differentiation occurs. However, some of these proteins have an important participation in malformations of the cranial portion and their mutation results in aberrant neurogenesis. This review aims to give an overview of the role of cell signaling and of the function of transcription factors involved in the specification of ganglia precursors and neurogenesis to form the NC-derived cranial nerves during organogenesis.
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Affiliation(s)
- Karla Méndez-Maldonado
- Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, Ciudad de México, Mexico.,Departamento de Fisiología y Farmacología, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Ciudad de México, Mexico
| | - Guillermo A Vega-López
- Instituto Superior de Investigaciones Biológicas (INSIBIO, CONICET-UNT), San Miguel de Tucumán, Argentina.,Instituto de Biología "Dr. Francisco D. Barbieri", Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina
| | - Manuel J Aybar
- Instituto Superior de Investigaciones Biológicas (INSIBIO, CONICET-UNT), San Miguel de Tucumán, Argentina.,Instituto de Biología "Dr. Francisco D. Barbieri", Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Miguel de Tucumán, Argentina
| | - Iván Velasco
- Instituto de Fisiología Celular - Neurociencias, Universidad Nacional Autónoma de México, Ciudad de México, Mexico.,Laboratorio de Reprogramación Celular, Instituto Nacional de Neurología y Neurocirugía "Manuel Velasco Suárez", Ciudad de México, Mexico
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35
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Paul MD, Grubb HN, Hristova K. Quantifying the strength of heterointeractions among receptor tyrosine kinases from different subfamilies: Implications for cell signaling. J Biol Chem 2020; 295:9917-9933. [PMID: 32467228 PMCID: PMC7380177 DOI: 10.1074/jbc.ra120.013639] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/20/2020] [Indexed: 01/09/2023] Open
Abstract
Receptor tyrosine kinases (RTKs) are single-pass membrane proteins that control vital cell processes such as cell growth, survival, and differentiation. There is a growing body of evidence that RTKs from different subfamilies can interact and that these diverse interactions can have important biological consequences. However, these heterointeractions are often ignored, and their strengths are unknown. In this work, we studied the heterointeractions of nine RTK pairs, epidermal growth factor receptor (EGFR)-EPH receptor A2 (EPHA2), EGFR-vascular endothelial growth factor receptor 2 (VEGFR2), EPHA2-VEGFR2, EPHA2-fibroblast growth factor receptor 1 (FGFR1), EPHA2-FGFR2, EPHA2-FGFR3, VEGFR2-FGFR1, VEGFR2-FGFR2, and VEGFR2-FGFR3, using a FRET-based method. Surprisingly, we found that RTK heterodimerization and homodimerization strengths can be similar, underscoring the significance of RTK heterointeractions in signaling. We discuss how these heterointeractions can contribute to the complexity of RTK signal transduction, and we highlight the utility of quantitative FRET for probing multiple interactions in the plasma membrane.
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Affiliation(s)
- Michael D Paul
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland, USA
- Program in Molecular Biophysics, Johns Hopkins University, Baltimore, Maryland, USA
| | - Hana N Grubb
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland, USA
| | - Kalina Hristova
- Institute for NanoBioTechnology, Johns Hopkins University, Baltimore, Maryland, USA
- Program in Molecular Biophysics, Johns Hopkins University, Baltimore, Maryland, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland, USA
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36
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OSCC Exosomes Regulate miR-210-3p Targeting EFNA3 to Promote Oral Cancer Angiogenesis through the PI3K/AKT Pathway. BIOMED RESEARCH INTERNATIONAL 2020; 2020:2125656. [PMID: 32695810 PMCID: PMC7368228 DOI: 10.1155/2020/2125656] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 06/19/2020] [Indexed: 12/11/2022]
Abstract
This study is aimed at determining how oral squamous cell carcinoma (OSCC) regulates the angiogenesis of HUVECs through miR-210-3p expression and exploring the relationship among miR-210-3p, its target protein, and the possible mechanism of angiogenesis regulation. miR-210-3p expression was detected in OSCC tissues and juxta cancerous tissues (JCT), and the relationship among miR-210-3p, microvessel density (MVD), and histopathologic features was analyzed. A conditioned medium (CM) of the OSCC cell line CAL27 was collected to stimulate human umbilical vein endothelial cells (HUVECs), and the miR-210-3p levels and tube formation capability of HUVECs were measured. The target protein level of miR-210-3p was altered; then, PI3K/AKT pathway activation in HUVECs was detected. miR-210-3p was tested in exosomes separated from CAL27 CM, and the transfer of miR-210-3p from OSCC exosomes to HUVECs was verified. Then, we found that the OSCC tissues had higher miR-210-3p levels than the JCT, and miR-210-3p level was positively correlated with MVD and tumor grade. CAL27 CM was able to elevate miR-210-3p levels in HUVECs and promoted tube formation. EFNA3 was the target gene of miR-210-3p, and ephrinA3 protein level was able to influence the migration and proliferation of HUVECs. The levels of phosphorylated AKT in the HUVECs increased when ephrinA3 was downregulated, and the upregulation of ephrinA3 resulted in the suppression of the PI3K/AKT pathway. miR-210-3p was detected in exosomes isolated from the CM of CAL27 cells, and miR-210-3p level in the HUVECs was elevated after absorbing the OSCC exosomes. In conclusion, miR-210-3p was more overexpressed in OSCC tissues than in the JCT. The exosomes secreted by OSCC cells were able to upregulate miR-210-3p expression and reduce ephrinA3 expression in HUVECs and promoted tube formation through the PI3K/AKT signaling pathway.
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37
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Grossemy S, Chan PP, Doran PM. Stimulation of cell growth and neurogenesis using protein-functionalized microfibrous scaffolds and fluid flow in bioreactors. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107602] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Qi Z, Yang X, Sang Y, Liu Y, Li J, Xu B, Liu W, He M, Xu Z, Deng Y, Zhu J. Fluoxetine and Riluzole Mitigates Manganese-Induced Disruption of Glutamate Transporters and Excitotoxicity via Ephrin-A3/GLAST-GLT-1/Glu Signaling Pathway in Striatum of Mice. Neurotox Res 2020; 38:508-523. [PMID: 32472497 DOI: 10.1007/s12640-020-00209-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Revised: 04/09/2020] [Accepted: 04/14/2020] [Indexed: 01/05/2023]
Abstract
Manganese (Mn) is an essential element required for many biological processes and systems in the human body. Mn intoxication increases brain glutamate (Glu) levels causing neuronal damage. Recent studies have reported that ephrin-A3 regulates this glutamate transporter. However, none has explored the role of this crucial molecule in Mn-induced excitotoxicity. The present study investigated whether ephrin-A3/GLAST-GLT-1/Glu signaling pathway participates in Mn-induced excitotoxicity using astrocytes and Kunming mice. The mechanisms were explored using fluoxetine (ephrin-A3 inhibitor) and riluzole (a Glu release inhibitor). Firstly, we demonstrated that Mn exposure (500 μM or 50 mg/kg MnCl2) significantly increased Mn, ephrin-A3, and Glu levels, and inhibited Na+-K+ ATPase activity, as well as mRNA and protein levels of GLAST and GLT-1. Secondly, we found that astrocytes and mice pretreated with fluoxetine (100 μM or 15 mg/kg) and riluzole (100 μM or 32 μmol/kg) prior to Mn exposure had lower ephrin-A3 and Glu levels, but higher Na+-K+ ATPase activity, expression levels of GLAST and GLT-1 than those exposed to 500 μM or 50 mg/kg MnCl2. Moreover, the morphology of cells and the histomorphology of mice striatum were injured. Results showed that pretreatment with fluoxetine and riluzole attenuated the Mn-induced motor dysfunctions. Together, these results suggest that the ephrin-A3/GLAST-GLT-1/Glu signaling pathway participates in Mn-induced excitotoxicity, and fluoxetine and riluzole can mitigate the Mn-induced excitotoxicity in mice brain.
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Affiliation(s)
- Zhipeng Qi
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Xinxin Yang
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Yanqi Sang
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Yanan Liu
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Jiashuo Li
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Bin Xu
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Wei Liu
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Miao He
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Zhaofa Xu
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China
| | - Yu Deng
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China.
| | - Jinghai Zhu
- Department of Environmental Health, School of Public Health, China Medical University, No.77 Puhe Road, Shenyang North New Area, Shenyang, Liaoning, 110122, People's Republic of China.
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Chen X, Zhang D, Wang Y, Chen K, Zhao L, Xu Y, Jiang H, Wang S. Synergistic antifibrotic effects of miR-451 with miR-185 partly by co-targeting EphB2 on hepatic stellate cells. Cell Death Dis 2020; 11:402. [PMID: 32467578 PMCID: PMC7256034 DOI: 10.1038/s41419-020-2613-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 02/07/2023]
Abstract
Liver fibrosis is a global health problem currently without clinically approved drugs. It is characterized by the excessive accumulation of extracellular matrix (ECM) mainly produced by activated hepatic stellate cells (HSCs). Uncovering the mechanisms underlying the fibrogenic responses in HSCs may have profound translational implications. Erythropoietin-producing hepatocellular receptor B2 (EphB2) is a receptor tyrosine kinase that has been indicated to be a novel profibrotic factor involved in liver fibrogenesis. In the present study, we investigated the effects of miR-451 and miR-185 on the expression of EphB2 and their roles in liver fibrogenesis both in vitro and in vivo. We found that EphB2 upregulation is a direct downstream molecular event of decreased expression of miR-451 and miR-185 in the process of liver fibrosis. Moreover, miR-451 was unexpectedly found to upregulate miR-185 expression at the post-transcriptional level by directly targeting the nuclear export receptor exportin 1 (XPO-1) and synergistically suppress HSCs activation with miR-185. To investigate the clinical potential of these miRNAs, miR-451/miR-185 agomirs were injected individually or jointly into CCl4-treated mice. The results showed that coadministration of these agomirs synergistically alleviated liver fibrosis in vivo. These findings indicate that miR-451 and miR-451/XPO-1/miR-185 axis play important and synergistic regulatory roles in hepatic fibrosis partly through co-targeting EphB2, which provides a novel therapeutic strategy for the treatment of hepatic fibrosis.
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Affiliation(s)
- Xiaogang Chen
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, 211198, Nanjing, China
| | - Dan Zhang
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, 211198, Nanjing, China
| | - Yi Wang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, 211198, Nanjing, China
| | - Ke Chen
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, 211198, Nanjing, China
| | - Limeng Zhao
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, 211198, Nanjing, China
| | - Yating Xu
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, 211198, Nanjing, China
| | - Hulin Jiang
- State Key Laboratory of Natural Medicines, Department of Pharmaceutics, China Pharmaceutical University, 211198, Nanjing, China.
| | - Shuzhen Wang
- State Key Laboratory of Natural Medicines, School of Life Science and Technology, China Pharmaceutical University, 211198, Nanjing, China.
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40
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Herkenne S, Ek O, Zamberlan M, Pellattiero A, Chergova M, Chivite I, Novotná E, Rigoni G, Fonseca TB, Samardzic D, Agnellini A, Bean C, Di Benedetto G, Tiso N, Argenton F, Viola A, Soriano ME, Giacomello M, Ziviani E, Sales G, Claret M, Graupera M, Scorrano L. Developmental and Tumor Angiogenesis Requires the Mitochondria-Shaping Protein Opa1. Cell Metab 2020; 31:987-1003.e8. [PMID: 32315597 DOI: 10.1016/j.cmet.2020.04.007] [Citation(s) in RCA: 92] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 03/17/2020] [Accepted: 04/03/2020] [Indexed: 01/01/2023]
Abstract
While endothelial cell (EC) function is influenced by mitochondrial metabolism, the role of mitochondrial dynamics in angiogenesis, the formation of new blood vessels from existing vasculature, is unknown. Here we show that the inner mitochondrial membrane mitochondrial fusion protein optic atrophy 1 (OPA1) is required for angiogenesis. In response to angiogenic stimuli, OPA1 levels rapidly increase to limit nuclear factor kappa-light-chain-enhancer of activated B cell (NFκB) signaling, ultimately allowing angiogenic genes expression and angiogenesis. Endothelial Opa1 is indeed required in an NFκB-dependent pathway essential for developmental and tumor angiogenesis, impacting tumor growth and metastatization. A first-in-class small molecule-specific OPA1 inhibitor confirms that EC Opa1 can be pharmacologically targeted to curtail tumor growth. Our data identify Opa1 as a crucial component of physiological and tumor angiogenesis.
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Affiliation(s)
- Stéphanie Herkenne
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Olivier Ek
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Margherita Zamberlan
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Anna Pellattiero
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Maya Chergova
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Iñigo Chivite
- Neuronal Control of Metabolism Laboratory, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain; CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain; School of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Eliška Novotná
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Giovanni Rigoni
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Tiago Branco Fonseca
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Dijana Samardzic
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Andrielly Agnellini
- Department of Biomedical Sciences, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Camilla Bean
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy
| | - Giulietta Di Benedetto
- Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy; Institute of Neuroscience, CNR, Padova, Italy
| | - Natascia Tiso
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Francesco Argenton
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Antonella Viola
- Department of Biomedical Sciences, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | | | - Marta Giacomello
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Department of Biomedical Sciences, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Elena Ziviani
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Gabriele Sales
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy
| | - Marc Claret
- Neuronal Control of Metabolism Laboratory, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), 08036 Barcelona, Spain; CIBER de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM), Barcelona, Spain; School of Medicine, Universitat de Barcelona, Barcelona, Spain
| | - Mariona Graupera
- Vascular Signalling Laboratory, ProCURE and Oncobell Programs, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Gran Via de l'Hospitalet 199, l'Hospitalet de Llobregat, Barcelona 08908, Spain; CIBERONC, Instituto de Salud Carlos III, Av. de Monforte de Lemos, 5, 28029 Madrid, Spain
| | - Luca Scorrano
- Department of Biology, University of Padova, Via U. Bassi 58B, 35121 Padova, Italy; Veneto Institute of Molecular Medicine, Via Orus 2, 35129 Padova, Italy.
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Chen Q, Liu J, Sawada T, Wei C, Wu S, Han F. Possible role of EphA4 and VEGFR2 interactions in neural stem and progenitor cell differentiation. Exp Ther Med 2020; 19:1789-1796. [PMID: 32104234 PMCID: PMC7027147 DOI: 10.3892/etm.2020.8419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 12/04/2019] [Indexed: 12/12/2022] Open
Abstract
Neural stem and progenitor cells (NSPCs) are important pluripotent stem cells, which have potential applications for cell replacement therapy. Ephrin receptors (Ephs) and angiogenic growth factor receptors have a major impact on the proliferation and differentiation of NSPCs. Potential interactions between EphA4 and vascular endothelial growth factor (VEGF) receptor (VEGFR) 2, and their roles in NSPC differentiation in vitro remain unknown. In the present study, mouse embryonic NSPCs were treated with ephrin-A1 or VEGF165 alone as well as with combination treatment (ephrin-A1 + VEGF165). Immunoprecipitation and immunoblot assays demonstrated that wild-type EphA4, but not the EphA4 kinase-dead mutant, interacted with VEGFR2 when overexpressed in 293T cells. This interaction was inhibited by dominant-negative EphA4. The percentage of β-tubulin III (Tuj1)+, but not glial fibrillary acid protein (GFAP)+ cells, was increased in the ephrin-A1 + VEGF165 combination group as compared to the VEGF165 alone group in mouse embryonic NSPCs. VEGF165-induced neuronal differentiation was potentiated by ephrin-A1 in NSPCs in vitro and ephrin-A1- or VEGF165-stimulated EphA4 and VEGFR2 interactions may mediate the signaling pathway.
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Affiliation(s)
- Qingfa Chen
- Centre for Tissue Engineering and Regenerative Medicine, Liaocheng People's Hospital, Liaocheng University, Liaocheng, Shandong 252000, P.R. China
| | - Jia Liu
- Department of Neurology, Liaocheng People's Hospital, Liaocheng University, Liaocheng, Shandong 252000, P.R. China
| | - Takahiro Sawada
- Department of Molecular Cell Biology and Molecular Medicine, Institute of Advanced Medicine, Wakayama Medical University, Kimiidera, Wakayama 641-8509, Japan
| | - Chuanfei Wei
- Centre for Tissue Engineering and Regenerative Medicine, Liaocheng People's Hospital, Liaocheng University, Liaocheng, Shandong 252000, P.R. China
| | - Shichao Wu
- Centre for Tissue Engineering and Regenerative Medicine, Liaocheng People's Hospital, Liaocheng University, Liaocheng, Shandong 252000, P.R. China
| | - Fabin Han
- Centre for Tissue Engineering and Regenerative Medicine, Liaocheng People's Hospital, Liaocheng University, Liaocheng, Shandong 252000, P.R. China
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42
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Niethamer TK, Teng T, Franco M, Du YX, Percival CJ, Bush JO. Aberrant cell segregation in the craniofacial primordium and the emergence of facial dysmorphology in craniofrontonasal syndrome. PLoS Genet 2020; 16:e1008300. [PMID: 32092051 PMCID: PMC7058351 DOI: 10.1371/journal.pgen.1008300] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 03/05/2020] [Accepted: 12/29/2019] [Indexed: 11/18/2022] Open
Abstract
Craniofrontonasal syndrome (CFNS) is a rare X-linked disorder characterized by craniofacial, skeletal, and neurological anomalies and is caused by mutations in EFNB1. Heterozygous females are more severely affected by CFNS than hemizygous males, a phenomenon called cellular interference that results from EPHRIN-B1 mosaicism. In Efnb1 heterozygous mice, mosaicism for EPHRIN-B1 results in cell sorting and more severe phenotypes than Efnb1 hemizygous males, but how craniofacial dysmorphology arises from cell segregation is unknown and CFNS etiology therefore remains poorly understood. Here, we couple geometric morphometric techniques with temporal and spatial interrogation of embryonic cell segregation in mouse mutant models to elucidate mechanisms underlying CFNS pathogenesis. By generating EPHRIN-B1 mosaicism at different developmental timepoints and in specific cell populations, we find that EPHRIN-B1 regulates cell segregation independently in early neural development and later in craniofacial development, correlating with the emergence of quantitative differences in face shape. Whereas specific craniofacial shape changes are qualitatively similar in Efnb1 heterozygous and hemizygous mutant embryos, heterozygous embryos are quantitatively more severely affected, indicating that Efnb1 mosaicism exacerbates loss of function phenotypes rather than having a neomorphic effect. Notably, neural tissue-specific disruption of Efnb1 does not appear to contribute to CFNS craniofacial dysmorphology, but its disruption within neural crest cell-derived mesenchyme results in phenotypes very similar to widespread loss. EPHRIN-B1 can bind and signal with EPHB1, EPHB2, and EPHB3 receptor tyrosine kinases, but the signaling partner(s) relevant to CFNS are unknown. Geometric morphometric analysis of an allelic series of Ephb1; Ephb2; Ephb3 mutant embryos indicates that EPHB2 and EPHB3 are key receptors mediating Efnb1 hemizygous-like phenotypes, but the complete loss of EPHB1-3 does not fully recapitulate the severity of CFNS-like Efnb1 heterozygosity. Finally, by generating Efnb1+/Δ; Ephb1; Ephb2; Ephb3 quadruple knockout mice, we determine how modulating cumulative receptor activity influences cell segregation in craniofacial development and find that while EPHB2 and EPHB3 play an important role in craniofacial cell segregation, EPHB1 is more important for cell segregation in the brain; surprisingly, complete loss of EPHB1-EPHB3 does not completely abrogate cell segregation. Together, these data advance our understanding of the etiology and signaling interactions underlying CFNS dysmorphology.
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Affiliation(s)
- Terren K. Niethamer
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America
- Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, United States of America
| | - Teng Teng
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America
- Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
| | - Melanie Franco
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America
- Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
| | - Yu Xin Du
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America
- Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
| | - Christopher J. Percival
- Department of Anthropology, Stony Brook University, Stony Brook, New York, United States of America
- * E-mail: (CJP); (JOB)
| | - Jeffrey O. Bush
- Program in Craniofacial Biology, University of California San Francisco, San Francisco, California, United States of America
- Department of Cell and Tissue Biology, University of California San Francisco, San Francisco, California, United States of America
- Institute for Human Genetics, University of California San Francisco, San Francisco, California, United States of America
- Biomedical Sciences Graduate Program, University of California San Francisco, San Francisco, California, United States of America
- * E-mail: (CJP); (JOB)
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43
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Lackey EP, Sillitoe RV. Eph/ephrin Function Contributes to the Patterning of Spinocerebellar Mossy Fibers Into Parasagittal Zones. Front Syst Neurosci 2020; 14:7. [PMID: 32116578 PMCID: PMC7033604 DOI: 10.3389/fnsys.2020.00007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 01/24/2020] [Indexed: 12/14/2022] Open
Abstract
Purkinje cell microcircuits perform diverse functions using widespread inputs from the brain and spinal cord. The formation of these functional circuits depends on developmental programs and molecular pathways that organize mossy fiber afferents from different sources into a complex and precisely patterned map within the granular layer of the cerebellum. During development, Purkinje cell zonal patterns are thought to guide mossy fiber terminals into zones. However, the molecular mechanisms that mediate this process remain unclear. Here, we used knockout mice to test whether Eph/ephrin signaling controls Purkinje cell-mossy fiber interactions during cerebellar circuit formation. Loss of ephrin-A2 and ephrin-A5 disrupted the patterning of spinocerebellar terminals into discrete zones. Zone territories in the granular layer that normally have limited spinocerebellar input contained ectopic terminals in ephrin-A2 -/-;ephrin-A5 -/- double knockout mice. However, the overall morphology of the cerebellum, lobule position, and Purkinje cell zonal patterns developed normally in the ephrin-A2 -/-;ephrin-A5 -/- mutant mice. This work suggests that communication between Purkinje cell zones and mossy fibers during postnatal development allows contact-dependent molecular cues to sharpen the innervation of sensory afferents into functional zones.
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Affiliation(s)
- Elizabeth P Lackey
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States.,Department of Neuroscience, Baylor College of Medicine, Houston, TX, United States.,Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX, United States
| | - Roy V Sillitoe
- Department of Pathology & Immunology, Baylor College of Medicine, Houston, TX, United States.,Department of Neuroscience, Baylor College of Medicine, Houston, TX, United States.,Jan and Dan Duncan Neurological Research Institute at Texas Children's Hospital, Houston, TX, United States.,Development, Disease Models & Therapeutics Graduate Program, Baylor College of Medicine, Houston, TX, United States.,Developmental Biology Graduate Program, Baylor College of Medicine, Houston, TX, United States
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44
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Zhu F, Dai SN, Xu DL, Hou CQ, Liu TT, Chen QY, Wu JL, Miao Y. EFNB2 facilitates cell proliferation, migration, and invasion in pancreatic ductal adenocarcinoma via the p53/p21 pathway and EMT. Biomed Pharmacother 2020; 125:109972. [PMID: 32036221 DOI: 10.1016/j.biopha.2020.109972] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 01/16/2020] [Accepted: 01/28/2020] [Indexed: 12/12/2022] Open
Abstract
Ephrin-2 (EFNB2) is expressed at abnormally high levels in some neoplasms, such as squamous cell carcinoma of the head and neck and colorectal cancer. Its overexpression is associated with the malignant progression of tumors. However, the expression of EFNB2 in pancreatic ductal adenocarcinoma (PDAC) has not been thoroughly studied. EFNB2 expression was evaluated by quantitative real-time PCR, immunohistochemistry, and western blotting. Furthermore, the association between its expression levels and the clinicopathological features of PDAC patients was explored. To determine the underlying mechanisms of EFNB2, we transfected PDAC cells with small interfering RNA and performed in vitro and in vivo experiments. EFNB2 expression levels were significantly increased in cancer tissues and were associated with PDAC clinical stage and Ki67 expression. The down-regulation of EFNB2 inhibited cell proliferation by up-regulating p53/p21-mediated G0/G1 phase blockade. Knockdown of EFNB2 decreased the migration and invasion of PDAC cells by blocking epithelial-mesenchymal transition. These results suggested that EFNB2 may participate in the development of PDAC by promoting cell proliferation, migration, and invasion. Thus, EFNB2 is a potential target for the diagnosis and treatment of PDAC.
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Affiliation(s)
- Feng Zhu
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Shang-Nan Dai
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Da-Lai Xu
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Chao-Qun Hou
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Tong-Tai Liu
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Qiu-Yang Chen
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Jun-Li Wu
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China.
| | - Yi Miao
- Pancreas Center, First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China; Pancreas Institute, Nanjing Medical University, Nanjing, Jiangsu Province, China.
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45
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Zhang JT, Liu Y, Li LX, Li K, Chen JG, Wang F. Activation of EphB2 in the basolateral amygdala promotes stress vulnerability of mice by increasing NMDA-dependent synaptic function. Neuropharmacology 2020; 167:107934. [PMID: 31926216 DOI: 10.1016/j.neuropharm.2019.107934] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 12/26/2019] [Accepted: 12/31/2019] [Indexed: 01/14/2023]
Abstract
The occurrence of major depressive disorder (MDD) has been linked to an increased vulnerability to stress. The basolateral amygdala (BLA) is one of the critical brain areas that involved in the regulation of pathological reactivity to stress. Increasing evidence indicates that the EphB2 receptor (EphB2) plays a critical role in neuropsychiatric disorders, such as Alzheimer's disease, pain and anxiety. However, whether the EphB2 in the BLA is involved in stress vulnerability is unclear. Here, we identified EphB2 in the BLA as a key regulator contributed to the modulation of stress vulnerability in adult mice. We found that the expression of EphB2 in the BLA was significantly increased in the animal model induced by chronic social stress. Knockdown of EphB2 in the BLA produced antidepressant-like behavioral effects, whereas activation of EphB2 in the BLA increased the susceptibility to subthreshold social defeat stress. Furthermore, we demonstrated that the role of EphB2 in the stress vulnerability was mediated by modulating NMDA receptors, since the knockdown of EphB2 in the BLA prevented not only the increase in the amplitudes of both the miniature and the evoked NMDAR-mediated EPSC, but also the enhancement of surface expression of NMDARs in the defeated mice. Taken together, these results suggest that EphB2 in the BLA is a critical factor contributes to the vulnerability to stress, which may be a potential target for the treatment of depression.
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Affiliation(s)
- Jie-Ting Zhang
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yang Liu
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Liang-Xia Li
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Kuan Li
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Jian-Guo Chen
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China; The Key Laboratory of Neurological Diseases (HUST), Ministry of Education of China, Wuhan, 430030, China; The Key Laboratory for Drug Target Researches and Pharmacodynamic Evaluation of Hubei Province, Wuhan, 430030, China.
| | - Fang Wang
- Department of Pharmacology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China; The Key Laboratory of Neurological Diseases (HUST), Ministry of Education of China, Wuhan, 430030, China; The Key Laboratory for Drug Target Researches and Pharmacodynamic Evaluation of Hubei Province, Wuhan, 430030, China.
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46
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Sato S, Vasaikar S, Eskaros A, Kim Y, Lewis JS, Zhang B, Zijlstra A, Weaver AM. EPHB2 carried on small extracellular vesicles induces tumor angiogenesis via activation of ephrin reverse signaling. JCI Insight 2019; 4:132447. [PMID: 31661464 DOI: 10.1172/jci.insight.132447] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Accepted: 10/23/2019] [Indexed: 12/19/2022] Open
Abstract
Angiogenesis is a key process that allows nutrient uptake and cellular trafficking and is coopted in cancer to enable tumor growth and metastasis. Recently, extracellular vesicles (EVs) have been shown to promote angiogenesis; however, it is unclear what unique features EVs contribute to the process. Here, we studied the role of EVs derived from head and neck squamous cell carcinoma (HNSCC) in driving tumor angiogenesis. Small EVs (SEVs), in the size range of exosomes (50-150 nm), induced angiogenesis both in vitro and in vivo. Proteomic analysis of HNSCC SEVs revealed the cell-to-cell signaling receptor ephrin type B receptor 2 (EPHB2) as a promising candidate cargo to promote angiogenesis. Analysis of patient data further identified EPHB2 overexpression in HNSCC tumors to be associated with poor patient prognosis and tumor angiogenesis, especially in the context of overexpression of the exosome secretion regulator cortactin. Functional experiments revealed that EPHB2 expression in SEVs regulated angiogenesis both in vitro and in vivo and that EPHB2 carried by SEVs stimulates ephrin-B reverse signaling, inducing STAT3 phosphorylation. A STAT3 inhibitor greatly reduced SEV-induced angiogenesis. These data suggest a model in which EVs uniquely promote angiogenesis by transporting Eph transmembrane receptors to nonadjacent endothelial cells to induce ephrin reverse signaling.
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Affiliation(s)
- Shinya Sato
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Suhas Vasaikar
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Adel Eskaros
- Department of Pathology, Microbiology and Immunology, and
| | - Young Kim
- Department of Otolaryngology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - James S Lewis
- Department of Pathology, Microbiology and Immunology, and
| | - Bing Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | | | - Alissa M Weaver
- Department of Cell and Developmental Biology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA.,Department of Pathology, Microbiology and Immunology, and
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47
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Ni Q, Chen P, Zhu B, Li J, Xie D, Ma X. Expression levels of EPHB4, EFNB2 and caspase-8 are associated with clinicopathological features and progression of esophageal squamous cell cancer. Oncol Lett 2019; 19:917-929. [PMID: 31885720 PMCID: PMC6924202 DOI: 10.3892/ol.2019.11160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 10/16/2019] [Indexed: 02/03/2023] Open
Abstract
The upregulation of EPH receptor B4 (EPHB4) results in a survival advantage for tumor cells via the inhibition of the casapse-8-mediated apoptotic pathway, which begins from the cell membrane. The present study investigated the expression patterns of EPHB4, ephrin B2 (EFNB2) and caspase-8 in patients with esophageal squamous cell carcinoma (ESCC). The association between the expression patterns and certain clinicopathological characteristics of the patients was also determined. mRNA levels of EPHB4, EFNB2 and caspase-8 in paired primary ESCC samples and adjacent esophageal tissues collected from 96 patients with ESCC were quantified using quantitative PCR. Upregulation of EPHB4 and EFNB2 mRNA expression, and downregulation of caspase-8 mRNA were detected in ESCC samples compared with that in the adjacent esophageal tissues. The expression levels of EPHB4 and EFNB2 were positively correlated with each other, whereas the mRNA levels of both EPHB4 and EFNB2 exhibited a negative correlation with that of caspase-8. The mRNA levels of both EPHB4 and EFNB2 demonstrated a significant positive association with certain clinicopathological features of patients with ESCC, including family history, tumor size, metastasis and stage. Conversely, a negative association was revealed between the expression level of caspase-8 and clinicopathological features of patients with ESCC. Moreover, mRNA expression levels of EPHB4 and EFNB2 were negatively associated with survival times of patients with ESCC, whereas the level of caspase-8 was positively associated with patient outcome. The results from the present study suggested that EPHB4, EFNB2 and caspase-8 may be implicated in the tumorigenesis and progression of ESCC, and that consequently, they may serve as useful prognostic markers, as well as potential therapeutic targets.
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Affiliation(s)
- Qianzhi Ni
- School of Biotechnology, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China.,CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, P.R. China
| | - Pingping Chen
- Department of Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan 45001, P.R. China
| | - Bing Zhu
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, P.R. China
| | - Jingjing Li
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, P.R. China
| | - Dong Xie
- CAS Key Laboratory of Nutrition, Metabolism and Food Safety, Shanghai Institute of Nutrition and Health, Shanghai Institutes for Biological Sciences, University of the Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200031, P.R. China.,NHC Key Laboratory of Food Safety Risk Assessment, China National Center for Food Safety Risk Assessment, Beijing 100022, P.R. China
| | - Xingyuan Ma
- School of Biotechnology, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, P.R. China
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48
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Chan A, Hertz DL, Morales M, Adams EJ, Gordon S, Tan CJ, Staff NP, Kamath J, Oh J, Shinde S, Pon D, Dixit N, D'Olimpio J, Dumitrescu C, Gobbo M, Kober K, Mayo S, Pang L, Subbiah I, Beutler AS, Peters KB, Loprinzi C, Lustberg MB. Biological predictors of chemotherapy-induced peripheral neuropathy (CIPN): MASCC neurological complications working group overview. Support Care Cancer 2019; 27:3729-3737. [PMID: 31363906 DOI: 10.1007/s00520-019-04987-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Accepted: 07/09/2019] [Indexed: 12/15/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a common and debilitating condition associated with a number of chemotherapeutic agents. Drugs commonly implicated in the development of CIPN include platinum agents, taxanes, vinca alkaloids, bortezomib, and thalidomide analogues. As a drug response can vary between individuals, it is hypothesized that an individual's specific genetic variants could impact the regulation of genes involved in drug pharmacokinetics, ion channel functioning, neurotoxicity, and DNA repair, which in turn affect CIPN development and severity. Variations of other molecular markers may also affect the incidence and severity of CIPN. Hence, the objective of this review was to summarize the known biological (molecular and genomic) predictors of CIPN and discuss the means to facilitate progress in this field.
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Affiliation(s)
- Alexandre Chan
- National University of Singapore, Singapore, Singapore
- National Cancer Centre Singapore, Singapore, Singapore
| | | | - Manuel Morales
- University Hospital Ntra. Sra. de Candelaria, Santa Cruz de Tenerife, Spain
| | - Elizabeth J Adams
- The Ohio State University Comprehensive Cancer Center, Columbus, USA
| | - Sharon Gordon
- University of Connecticut, Storrs, USA
- East Carolina University, Greenville, USA
| | - Chia Jie Tan
- National University of Singapore, Singapore, Singapore
- National Cancer Centre Singapore, Singapore, Singapore
| | | | - Jayesh Kamath
- University of Connecticut Health Center, Storrs, USA
| | - Jeong Oh
- MD Anderson Cancer Center, Houston, USA
| | - Shivani Shinde
- University of Colorado, Colorado, USA
- VA Eastern Colorado Health Care Systems, Aurora, MS, USA
| | - Doreen Pon
- Western University of Health Sciences, Pomona, USA
| | - Niharkia Dixit
- University of California San Francisco, San Francisco, USA
- Zuckerberg San Francisco General Hospital, San Francisco, USA
| | - James D'Olimpio
- Northwell Cancer Institute, New Hyde Park, USA
- Zucker School of Medicine at Hofstra, 500 Hofstra Blvd, Hempstead, USA
| | | | | | - Kord Kober
- University of California San Francisco, San Francisco, USA
- Helen Diller Comprehensive Cancer Centre, San Francisco, USA
| | | | | | | | | | | | | | - Maryam B Lustberg
- The Ohio State University Comprehensive Cancer Center, Columbus, USA.
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Grossemy S, Chan PPY, Doran PM. Electrical stimulation of cell growth and neurogenesis using conductive and nonconductive microfibrous scaffolds. Integr Biol (Camb) 2019; 11:264-279. [DOI: 10.1093/intbio/zyz022] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 05/01/2019] [Accepted: 06/12/2019] [Indexed: 11/13/2022]
Abstract
Abstract
The effect of exogenous electrical stimulation on cell viability, attachment, growth, and neurogenesis was examined using PC12 cells in microfibrous viscose-rayon scaffolds immersed in culture medium. The scaffolds were applied either in their nonconductive state or after coating the fibres with 200 nm of gold to give a scaffold sheet resistivity of (13 ± 1.3) Ω square−1. The cells were treated for 12 days using direct current electrical stimulation of 2 h per day. No cytotoxic effects were observed when up to 500 mV (8.3 mV mm−1) was applied to the scaffolds without gold, or when up to 100 mV (1.7 mV mm−1) was applied to the scaffolds with gold. Compared with unstimulated cells, whereas electrical stimulation significantly enhanced cell growth and attachment in the nonconductive scaffolds without gold, similar effects were not found for the conductive scaffolds with gold. Neural differentiation in the presence of nerve growth factor was improved by electrical stimulation in both scaffolds; however, neurite development and the expression of key differentiation markers were greater in the nonconductive scaffolds without gold than in the scaffolds with gold. Application of the same current to scaffolds with and without gold led to much higher levels of neurogenesis in the scaffolds without gold. This work demonstrates that substantial benefits in terms of cell growth and neural differentiation can be obtained using electric fields exerted across nonconductive microfibrous scaffolds, and that this approach to electrical stimulation can be more effective than when the stimulus is applied to cells on conductive scaffolds.
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Affiliation(s)
- Simon Grossemy
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Melbourne, Australia
| | - Peggy P Y Chan
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Melbourne, Australia
| | - Pauline M Doran
- Faculty of Science, Engineering and Technology, Swinburne University of Technology, PO Box 218, Hawthorn, Melbourne, Australia
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Zhu M, Hua Y, Tang J, Zhao X, Zhang L, Zhang Y. Lentiviral-mediated ephrin B2 gene modification of rat bone marrow mesenchymal stem cells. J Int Med Res 2019; 47:3282-3298. [PMID: 31122164 PMCID: PMC6683898 DOI: 10.1177/0300060519843023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective To determine the effect of the upregulation or knockdown of the ephrinB2 (Efnb2) gene and the effect of EphB4/EphrinB2 signalling in rat bone marrow mesenchymal stem cells (BMSCs). Methods Rat BMSCs were infected with lentivirus vectors carrying EphrinB2 and shRNA-EphrinB2. EphrinB2 mRNA and protein levels were quantified. At 28 days of culture with neuronal cell-conditioned differentiation medium, levels of microtubule-associated protein 2 (MAP2), CD133 and nestin were detected in EphrinB2/BMSCs and shEphrinB2/BMSCs using quantitative polymerase chain reaction and immunofluorescence. The ability of these cells to migrate was evaluated using a transwell assay. Results BMSCs were successfully isolated as indicated by their CD90+ CD29+ CD34– CD45– phenotype. Three days after ephrinB2 transduction, BMSC cell bodies began to shrink and differentiate into neuron-like cells. At 28 days, levels of MAP2, CD133 and nestin, as well as the number of migratory cells, were higher in lenti-EphrinB2-BMSCs than in the two control groups. The shEphrinB2/BMSCs had reduced levels of MAP2, CD133 and nestin; and a lower rate of cell migration. Similarly, increased levels of Grb4 andp21-activated kinase in the EphB4/EphrinB2 reverse signalling pathway were observed by Western blot. Conclusions LV-EphrinB2 can be efficiently transduced into BMSCs, which then differentiate into neuron-like cells.
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Affiliation(s)
- Min Zhu
- Department of Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Yu Hua
- Department of Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Jian Tang
- Department of Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Xiaoke Zhao
- Department of Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Ling Zhang
- Department of Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
| | - Yue Zhang
- Department of Rehabilitation, Children's Hospital of Nanjing Medical University, Nanjing, Jiangsu Province, China
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