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Ortega-Gascó A, Parcerisas A, Hino K, Herranz-Pérez V, Ulloa F, Elias-Tersa A, Bosch M, García-Verdugo JM, Simó S, Pujadas L, Soriano E. Regulation of young-adult neurogenesis and neuronal differentiation by neural cell adhesion molecule 2 (NCAM2). Cereb Cortex 2023; 33:10931-10948. [PMID: 37724425 PMCID: PMC10629901 DOI: 10.1093/cercor/bhad340] [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: 04/29/2022] [Revised: 08/21/2023] [Accepted: 08/22/2023] [Indexed: 09/20/2023] Open
Abstract
Adult neurogenesis persists in mammals in the neurogenic zones, where newborn neurons are incorporated into preexisting circuits to preserve and improve learning and memory tasks. Relevant structural elements of the neurogenic niches include the family of cell adhesion molecules (CAMs), which participate in signal transduction and regulate the survival, division, and differentiation of radial glial progenitors (RGPs). Here we analyzed the functions of neural cell adhesion molecule 2 (NCAM2) in the regulation of RGPs in adult neurogenesis and during corticogenesis. We characterized the presence of NCAM2 across the main cell types of the neurogenic process in the dentate gyrus, revealing different levels of NCAM2 amid the progression of RGPs and the formation of neurons. We showed that Ncam2 overexpression in adult mice arrested progenitors in an RGP-like state, affecting the normal course of young-adult neurogenesis. Furthermore, changes in Ncam2 levels during corticogenesis led to transient migratory deficits but did not affect the survival and proliferation of RGPs, suggesting a differential role of NCAM2 in adult and embryonic stages. Our data reinforce the relevance of CAMs in the neurogenic process by revealing a significant role of Ncam2 levels in the regulation of RGPs during young-adult neurogenesis in the hippocampus.
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Affiliation(s)
- Alba Ortega-Gascó
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat de Barcelona (UB), 643 Diagonal Ave., Barcelona 08028, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
| | - Antoni Parcerisas
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat de Barcelona (UB), 643 Diagonal Ave., Barcelona 08028, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
- Department of Biosciences, Faculty of Sciences, Technology and Engineering, University of Vic – Central University of Catalonia (UVic-UCC), 13 Laura St., Vic 08500, Spain
- Tissue Repair and Regeneration Laboratory (TR2Lab), Institut de Recerca i Innovació en Ciències de la Vida i de la Salut a la Catalunya Central (IRIS-CC), 70 Roda Rd., Vic 08500, Spain
- Department of Basic Sciences, International University of Catalonia (UIC), S/N Josep Trueta St., Sant Cugat del Vallès 08195, Spain
| | - Keiko Hino
- Department of Cell Biology and Human Anatomy, University of California Davis, 1275 Med Science Dr., Davis, CA 95616, USA
| | - Vicente Herranz-Pérez
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
- Laboratory of Comparative Neurobiology, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, 7 Catedràtic Agustín Escardino Benlloch St., València 46010, Spain
- Predepartamental Unit of Medicine, Faculty of Health Sciences, Jaume I University, S/N Vicent Sos Baynat Ave., Castelló de la Plana 12006, Spain
| | - Fausto Ulloa
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat de Barcelona (UB), 643 Diagonal Ave., Barcelona 08028, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
| | - Alba Elias-Tersa
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat de Barcelona (UB), 643 Diagonal Ave., Barcelona 08028, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
| | - Miquel Bosch
- Department of Basic Sciences, International University of Catalonia (UIC), S/N Josep Trueta St., Sant Cugat del Vallès 08195, Spain
| | - José Manuel García-Verdugo
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
- Laboratory of Comparative Neurobiology, Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, 7 Catedràtic Agustín Escardino Benlloch St., València 46010, Spain
| | - Sergi Simó
- Department of Cell Biology and Human Anatomy, University of California Davis, 1275 Med Science Dr., Davis, CA 95616, USA
| | - Lluís Pujadas
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat de Barcelona (UB), 643 Diagonal Ave., Barcelona 08028, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
- Tissue Repair and Regeneration Laboratory (TR2Lab), Institut de Recerca i Innovació en Ciències de la Vida i de la Salut a la Catalunya Central (IRIS-CC), 70 Roda Rd., Vic 08500, Spain
- Department of Experimental Sciences and Methodology, Faculty of Heath Sciences and Wellfare, University of Vic - Central University of Catalonia (UVic-UCC), 7 Sagrada Família St., Vic 08500, Spain
| | - Eduardo Soriano
- Department of Cell Biology, Physiology, and Immunology, Institute of Neurosciences, Universitat de Barcelona (UB), 643 Diagonal Ave., Barcelona 08028, Spain
- Centro de Investigación Biomédica en Red Sobre Enfermedades Neurodegenerativas (CIBERNED), CIBER, Instituto de Salud Carlos III, 4 Sinesio Delgado, Madrid 28031, Spain
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2
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Mosteiro A, Pedrosa L, Ferrés A, Diao D, Sierra À, González JJ. The Vascular Microenvironment in Glioblastoma: A Comprehensive Review. Biomedicines 2022; 10:biomedicines10061285. [PMID: 35740307 PMCID: PMC9219822 DOI: 10.3390/biomedicines10061285] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/25/2022] [Accepted: 05/28/2022] [Indexed: 02/06/2023] Open
Abstract
Glioblastoma multiforme, the deadliest primary brain tumor, is characterized by an excessive and aberrant neovascularization. The initial expectations raised by anti-angiogenic drugs were soon tempered due to their limited efficacy in improving the overall survival. Intrinsic resistance and escape mechanisms against anti-VEGF therapies evidenced that tumor angiogenesis is an intricate multifaceted phenomenon and that vessels not only support the tumor but exert indispensable interactions for resistance and spreading. This holistic review covers the essentials of the vascular microenvironment of glioblastoma, including the perivascular niche components, the vascular generation patterns and the implicated signaling pathways, the endothelial–tumor interrelation, and the interconnection between vessel aberrancies and immune disarrangement. The revised concepts provide novel insights into the preclinical models and the potential explanations for the failure of conventional anti-angiogenic therapies, leading to an era of new and combined anti-angiogenic-based approaches.
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Affiliation(s)
- Alejandra Mosteiro
- Department of Neurosurgery, Hospital Clínic de Barcelona, 08036 Barcelona, Spain; (A.F.); (J.J.G.)
- Correspondence:
| | - Leire Pedrosa
- Laboratory of Experimental Oncological Neurosurgery, Hospital Clínic de Barcelona, 08036 Barcelona, Spain; (L.P.); (D.D.); (À.S.)
| | - Abel Ferrés
- Department of Neurosurgery, Hospital Clínic de Barcelona, 08036 Barcelona, Spain; (A.F.); (J.J.G.)
| | - Diouldé Diao
- Laboratory of Experimental Oncological Neurosurgery, Hospital Clínic de Barcelona, 08036 Barcelona, Spain; (L.P.); (D.D.); (À.S.)
| | - Àngels Sierra
- Laboratory of Experimental Oncological Neurosurgery, Hospital Clínic de Barcelona, 08036 Barcelona, Spain; (L.P.); (D.D.); (À.S.)
- Department of Medicine and Life Sciences (MELIS), Universitat Pompeu Fabra, 08003 Barcelona, Spain
| | - José Juan González
- Department of Neurosurgery, Hospital Clínic de Barcelona, 08036 Barcelona, Spain; (A.F.); (J.J.G.)
- Laboratory of Experimental Oncological Neurosurgery, Hospital Clínic de Barcelona, 08036 Barcelona, Spain; (L.P.); (D.D.); (À.S.)
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3
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Zhou H, Yu Q, Li Y, Fu F, Li R, Chen G, Wang D, Lu Y, Yang X, Li D, Liao C. Case Report: Two Novel L1CAM Mutations in Two Unrelated Chinese Families With X-Linked Hydrocephalus. Front Genet 2022; 13:810853. [PMID: 35571029 PMCID: PMC9099044 DOI: 10.3389/fgene.2022.810853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Accepted: 04/04/2022] [Indexed: 11/23/2022] Open
Abstract
L1 cell adhesion molecule is a type I transmembrane glycoprotein belonging to the immunoglobulin superfamily. Pathogenic mutations of L1CAM can cause L1 syndrome, referred to as a variety of disease spectrums characterized by hydrocephalus. In the present study, we reported two novel variants of L1CAM in two unrelated Chinese families with fetal hydrocephalus history. The woman of family 1, with three consecutive adverse birth histories of male fetuses with hydrocephalus, was identified by an exome sequence with a heterozygous mutation in the L1CAM gene, NM_000425.4: c.1696_1703 + 14del (p. S566Vfs*35), which was predicted to be pathogenic. It is predicted to disrupt RNA splicing and likely leads to an absent or disrupted protein product. In family 2, the mother, previously with once a voluntary termination of pregnancy owning to the fetus with hydrocephalus, was pregnant with a fetus with hydrocephalus in her second pregnancy. After fetal blood sampling, a pathogenic deletion of 1511bp in L1CAM, chromosome X: 153131395-153132905(hg19/GRCh37)/NM_000425.4: c.2043_2432-121del1511 leading to deletion of fibronectin type-III repeats I-II, was identified in the fetus with hydrocephalus inherited from the mother by an exome sequence. On her third pregnancy, a healthy female fetus was born without the L1CAM variant by preimplantation genetic testing for the monogenic disorder. This study emphasizes the importance of ultrasonic manifestation and family history of fetal hydrocephalus for L1CAM diagnosis. Our study expands the genotypes of L1CAM and aids the genetic counseling of fetal hydrocephalus and even preimplantation genetic testing for the monogenic disorder.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Can Liao
- Department of Prenatal Diagnostic Center, Guangzhou Women and Children’s Medical Center, Guangzhou Medical University, Guangzhou, China
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4
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The canonical FGF-FGFR signaling system at the molecular level. POSTEP HIG MED DOSW 2022. [DOI: 10.2478/ahem-2021-0024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Abstract
Extracellular signaling molecules, among them the fibroblast growth factors (FGFs), enable cells to communicate with neighboring cells. Such signaling molecules that receive and transmit a signal require specific tyrosine kinase receptors located at the cell surface (fibroblast growth factor receptors, FGFRs). The binding of a signaling molecule to its specific receptor results in receptor dimerization and conformational changes in the cytoplasmic part of the receptor. The conformational changes lead to trans-autophosphorylation of the tyrosine kinase domains of the receptors and subsequently to induction of several downstream signaling pathways and expression of appropriate genes. The signaling pathways activated by FGFs control and coordinate cell behaviors such as cell division, migration, differentiation, and cell death. FGFs and their transmembrane receptors are widely distributed in different tissues and participate in fundamental processes during embryonic, fetal, and adult human life. The human FGF/FGFR family comprises 22 ligands and 4 high affinity receptors. In addition, FGFs bind to low affinity receptors, heparan sulfate proteoglycans at the cell surface. The availability of appropriate ligand/receptor pair, combined with the co-receptor, initiates signaling. Inappropriate FGF/FGFR signaling can cause skeletal disorders, primarily dwarfism, craniofacial malformation syndromes, mood disorders, metabolic disorders, and Kallman syndrome. In addition, aberrations in FGF/FGFR signaling have already been reported in several types of malignant diseases. Knowledge about the molecular mechanisms of FGF/FGFR activation and signaling is necessary to understand the basis of these diseases.
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5
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Giordano M, Decio A, Battistini C, Baronio M, Bianchi F, Villa A, Bertalot G, Freddi S, Lupia M, Jodice MG, Ubezio P, Colombo N, Giavazzi R, Cavallaro U. L1CAM promotes ovarian cancer stemness and tumor initiation via FGFR1/SRC/STAT3 signaling. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2021; 40:319. [PMID: 34645505 PMCID: PMC8513260 DOI: 10.1186/s13046-021-02117-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/26/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND Cancer stem cells (CSC) have been implicated in tumor progression. In ovarian carcinoma (OC), CSC drive tumor formation, dissemination and recurrence, as well as drug resistance, thus contributing to the high death-to-incidence ratio of this disease. However, the molecular basis of such a pathogenic role of ovarian CSC (OCSC) has been elucidated only to a limited extent. In this context, the functional contribution of the L1 cell adhesion molecule (L1CAM) to OC stemness remains elusive. METHODS The expression of L1CAM was investigated in patient-derived OCSC. The genetic manipulation of L1CAM in OC cells provided gain and loss-of-function models that were then employed in cell biological assays as well as in vivo tumorigenesis experiments to assess the role of L1CAM in OC cell stemness and in OCSC-driven tumor initiation. We applied antibody-mediated neutralization to investigate L1CAM druggability. Biochemical approaches were then combined with functional in vitro assays to study the molecular mechanisms underlying the functional role of L1CAM in OCSC. RESULTS We report that L1CAM is upregulated in patient-derived OCSC. Functional studies showed that L1CAM promotes several stemness-related properties in OC cells, including sphere formation, tumor initiation and chemoresistance. These activities were repressed by an L1CAM-neutralizing antibody, pointing to L1CAM as a druggable target. Mechanistically, L1CAM interacted with and activated fibroblast growth factor receptor-1 (FGFR1), which in turn induced the SRC-mediated activation of STAT3. The inhibition of STAT3 prevented L1CAM-dependent OC stemness and tumor initiation. CONCLUSIONS Our study implicate L1CAM in the tumorigenic function of OCSC and point to the L1CAM/FGFR1/SRC/STAT3 signaling pathway as a novel driver of OC stemness. We also provide evidence that targeting this pathway can contribute to OC eradication.
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Affiliation(s)
- Marco Giordano
- Unit of Gynaecological Oncology Research, European Institute of Oncology IRCSS, Milan, Italy
| | - Alessandra Decio
- Laboratory of Tumor Metastasis Therapeutics, Mario Negri Institute for Pharmacological Research - IRCCS, Milan, Italy
| | - Chiara Battistini
- Unit of Gynaecological Oncology Research, European Institute of Oncology IRCSS, Milan, Italy
| | - Micol Baronio
- Unit of Gynaecological Oncology Research, European Institute of Oncology IRCSS, Milan, Italy
| | - Fabrizio Bianchi
- Cancer Biomarkers Unit, Fondazione IRCCS Casa Sollievo della Sofferenza, 71013, San Giovanni Rotondo, FG, Italy
| | - Alessandra Villa
- Unit of Gynaecological Oncology Research, European Institute of Oncology IRCSS, Milan, Italy.,Philochem AG, Otelfingen, Switzerland
| | - Giovanni Bertalot
- Department of Experimental Oncology, European Institute of Oncology IRCSS, Milan, Italy.,Division of Anatomical Pathology, Santa Chiara Hospital, Trento, Italy
| | - Stefano Freddi
- Department of Experimental Oncology, European Institute of Oncology IRCSS, Milan, Italy
| | - Michela Lupia
- Unit of Gynaecological Oncology Research, European Institute of Oncology IRCSS, Milan, Italy
| | - Maria Giovanna Jodice
- Department of Experimental Oncology, European Institute of Oncology IRCSS, Milan, Italy
| | - Paolo Ubezio
- Laboratory of Tumor Metastasis Therapeutics, Mario Negri Institute for Pharmacological Research - IRCCS, Milan, Italy
| | - Nicoletta Colombo
- Division of Gynecologic Oncology, European Institute of Oncology IRCSS, Milan, Italy.,University of Milan-Bicocca, Milan, Italy
| | - Raffaella Giavazzi
- Laboratory of Tumor Metastasis Therapeutics, Mario Negri Institute for Pharmacological Research - IRCCS, Milan, Italy
| | - Ugo Cavallaro
- Unit of Gynaecological Oncology Research, European Institute of Oncology IRCSS, Milan, Italy.
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6
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Rosińska S, Gavard J. Tumor Vessels Fuel the Fire in Glioblastoma. Int J Mol Sci 2021; 22:6514. [PMID: 34204510 PMCID: PMC8235363 DOI: 10.3390/ijms22126514] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/14/2021] [Accepted: 06/15/2021] [Indexed: 02/07/2023] Open
Abstract
Glioblastoma, a subset of aggressive brain tumors, deploy several means to increase blood vessel supply dedicated to the tumor mass. This includes typical program borrowed from embryonic development, such as vasculogenesis and sprouting angiogenesis, as well as unconventional processes, including co-option, vascular mimicry, and transdifferentiation, in which tumor cells are pro-actively engaged. However, these neo-generated vascular networks are morphologically and functionally abnormal, suggesting that the vascularization processes are rather inefficient in the tumor ecosystem. In this review, we reiterate the specificities of each neovascularization modality in glioblastoma, and, how they can be hampered mechanistically in the perspective of anti-cancer therapies.
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Affiliation(s)
- Sara Rosińska
- CRCINA, Inserm, CNRS, Université de Nantes, 44000 Nantes, France;
| | - Julie Gavard
- CRCINA, Inserm, CNRS, Université de Nantes, 44000 Nantes, France;
- Integrated Center for Oncology, ICO, 44800 St. Herblain, France
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7
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Resnik-Docampo M, Cunningham KM, Ruvalcaba SM, Choi C, Sauer V, Jones DL. Neuroglian regulates Drosophila intestinal stem cell proliferation through enhanced signaling via the epidermal growth factor receptor. Stem Cell Reports 2021; 16:1584-1597. [PMID: 33961791 PMCID: PMC8190597 DOI: 10.1016/j.stemcr.2021.04.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 04/11/2021] [Accepted: 04/12/2021] [Indexed: 12/27/2022] Open
Abstract
The Drosophila intestine is an excellent system for elucidating mechanisms regulating stem cell behavior. Here we show that the septate junction (SJ) protein Neuroglian (Nrg) is expressed in intestinal stem cells (ISCs) and enteroblasts (EBs) within the fly intestine. SJs are not present between ISCs and EBs, suggesting Nrg plays a different role in this tissue. We reveal that Nrg is required for ISC proliferation in young flies, and depletion of Nrg from ISCs and EBs suppresses increased ISC proliferation in aged flies. Conversely, overexpression of Nrg in ISC and EBs promotes ISC proliferation, leading to an increase in cells expressing ISC/EB markers; in addition, we observe an increase in epidermal growth factor receptor (Egfr) activation. Genetic epistasis experiments reveal that Nrg acts upstream of Egfr to regulate ISC proliferation. As Nrg function is highly conserved in mammalian systems, our work characterizing the role of Nrg in the intestine has implications for the treatment of intestinal disorders that arise due to altered ISC behavior.
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Affiliation(s)
- Martin Resnik-Docampo
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kathleen M Cunningham
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - S Mateo Ruvalcaba
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Charles Choi
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Vivien Sauer
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - D Leanne Jones
- Department of Molecular, Cell and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA; Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA; Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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8
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Yang S, Emelyanov A, You MS, Sin M, Korzh V. Camel regulates development of the brain ventricular system. Cell Tissue Res 2021; 383:835-852. [PMID: 32902807 PMCID: PMC7904751 DOI: 10.1007/s00441-020-03270-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 07/29/2020] [Indexed: 10/25/2022]
Abstract
Development of the brain ventricular system of vertebrates and the molecular mechanisms involved are not fully understood. The developmental genes expressed in the elements of the brain ventricular system such as the ependyma and circumventricular organs act as molecular determinants of cell adhesion critical for the formation of brain ventricular system. They control brain development and function, including the flow of cerebrospinal fluid. Here, we describe the novel distantly related member of the zebrafish L1-CAM family of genes-camel. Whereas its maternal transcripts distributed uniformly, the zygotic transcripts demonstrate clearly defined expression patterns, in particular in the axial structures: floor plate, hypochord, and roof plate. camel expresses in several other cell lineages with access to the brain ventricular system, including the midbrain roof plate, subcommissural organ, organum vasculosum lamina terminalis, median eminence, paraventricular organ, flexural organ, and inter-rhombomeric boundaries. This expression pattern suggests a role of Camel in neural development. Several isoforms of Camel generated by differential splicing of exons encoding the sixth fibronectin type III domain enhance cell adhesion differentially. The antisense oligomer morpholino-mediated loss-of-function of Camel affects cell adhesion and causes hydrocephalus and scoliosis manifested via the tail curled down phenotype. The subcommissural organ's derivative-the Reissner fiber-participates in the flow of cerebrospinal fluid. The Reissner fiber fails to form upon morpholino-mediated Camel loss-of-function. The Camel mRNA-mediated gain-of-function causes the Reissner fiber misdirection. This study revealed a link between Chl1a/Camel and Reissner fiber formation, and this supports the idea that CHL1 is one of the scoliosis factors.
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Affiliation(s)
- Shulan Yang
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
- Translational Medicine Centre, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Alexander Emelyanov
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
- Institute for Research on Cancer and Aging, Nice, France
| | - May-Su You
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
- National Health Research Institutes, Zhunan, Taiwan
| | - Melvin Sin
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Vladimir Korzh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore.
- International Institute of Molecular and Cell Biology, Warsaw, Poland.
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9
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Kleene R, Lutz D, Loers G, Bork U, Borgmeyer U, Hermans-Borgmeyer I, Schachner M. Revisiting the proteolytic processing of cell adhesion molecule L1. J Neurochem 2020; 157:1102-1117. [PMID: 32986867 DOI: 10.1111/jnc.15201] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/18/2020] [Accepted: 09/22/2020] [Indexed: 01/02/2023]
Abstract
The important functions of cell adhesion molecule L1 in the nervous system depend on diverse proteolytic enzymes which generate different L1 fragments. It has been reported that cleavage in the third fibronectin type III (FNIII) homologous domain generates the fragments L1-80 and L1-140, while cleavage in the first FNIII domain yields the fragments L1-70 and L1-135. These results raised questions concerning the L1 cleavage sites. We thus generated gene-edited mice expressing L1 with mutations of the cleavage sites either in the first or third FNIII domain. By immunoprecipitations and immunoblot analyses using brain homogenates and different L1 antibodies, we show that L1-70 and L1-135 are generated in wild-type mice, but not or only to a low extent in L1 mutant mice. L1-80 and L1-140 were not detected in wild-type or mutant mice. Mass spectrometry confirmed the results from immunoprecipitations and immunoblot analyses. Based on these observations, we propose that L1-70 and L1-135 are the predominant fragments in the mouse nervous system and that the third FNIII domain is decisive for generating these fragments. Treatment of cultured cerebellar neurons with trypsin or plasmin, which were both proposed to generate L1-80 and L1-140 by cleaving in the third FNIII domain, showed by immunoprecipitations and immunoblot analyses that both proteases lead to the generation of L1-70 and L1-135, but not L1-80 and L1-140. We discuss previous observations on the basis of our new results and propose a novel view on the molecular features that render previous and present observations compatible.
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Affiliation(s)
- Ralf Kleene
- Research Group Biosynthesis of Neural Structures, Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - David Lutz
- Institute for Structural Neurobiology, Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany.,Department for Neuroanatomy and Molecular Brain Research, Ruhr-University Bochum, Bochum, Germany
| | - Gabriele Loers
- Research Group Biosynthesis of Neural Structures, Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Ute Bork
- Research Group Biosynthesis of Neural Structures, Zentrum für Molekulare Neurobiologie, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Uwe Borgmeyer
- Scientific Service Group for Transgenic Animals, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Irm Hermans-Borgmeyer
- Scientific Service Group for Transgenic Animals, Universitätsklinikum Hamburg-Eppendorf, Hamburg, Germany
| | - Melitta Schachner
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, USA
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10
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Giordano M, Cavallaro U. Different Shades of L1CAM in the Pathophysiology of Cancer Stem Cells. J Clin Med 2020; 9:E1502. [PMID: 32429448 PMCID: PMC7291284 DOI: 10.3390/jcm9051502] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/07/2020] [Accepted: 05/13/2020] [Indexed: 12/12/2022] Open
Abstract
L1 cell adhesion molecule (L1CAM) is aberrantly expressed in several tumor types where it is causally linked to malignancy and therapy resistance, acting also as a poor prognosis factor. Accordingly, several approaches have been developed to interfere with L1CAM function or to deliver cytotoxic agents to L1CAM-expressing tumors. Metastatic dissemination, tumor relapse and drug resistance can be fueled by a subpopulation of neoplastic cells endowed with peculiar biological properties that include self-renewal, efficient DNA repair, drug efflux machineries, quiescence, and immune evasion. These cells, known as cancer stem cells (CSC) or tumor-initiating cells, represent, therefore, an ideal target for tumor eradication. However, the molecular and functional traits of CSC have been unveiled only to a limited extent. In this context, it appears that L1CAM is expressed in the CSC compartment of certain tumors, where it plays a causal role in stemness itself and/or in biological processes intimately associated with CSC (e.g., epithelial-mesenchymal transition (EMT) and chemoresistance). This review summarizes the role of L1CAM in cancer focusing on its functional contribution to CSC pathophysiology. We also discuss the clinical usefulness of therapeutic strategies aimed at targeting L1CAM in the context of anti-CSC treatments.
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Affiliation(s)
| | - Ugo Cavallaro
- Unit of Gynaecological Oncology Research, European Institute of Oncology IRCSS, 20128 Milan, Italy;
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11
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García-Gómez P, Valiente M. Vascular co-option in brain metastasis. Angiogenesis 2019; 23:3-8. [PMID: 31701335 DOI: 10.1007/s10456-019-09693-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/26/2019] [Indexed: 12/29/2022]
Abstract
Vascular co-option by brain metastasis-initiating cells has been demonstrated as a critical step in organ colonization. The physical interaction between the cancer cell and the endothelial cell is mediated by integrins and L1CAM and could be involved in aggressive growth but also latency and immune evasion. The key involvement of vascular co-option in brain metastasis has created an emerging field that aims to identify critical targets as well as effective inhibitors with the goal of preventing brain metastases.
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Affiliation(s)
- Pedro García-Gómez
- Brain Metastasis Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
| | - Manuel Valiente
- Brain Metastasis Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain.
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12
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Pusey MA, Pace K, Fascelli M, Linser PJ, Steindler DA, Galileo DS. Ectopic expression of L1CAM ectodomain alters differentiation and motility, but not proliferation, of human neural progenitor cells. Int J Dev Neurosci 2019; 78:49-64. [PMID: 31421150 DOI: 10.1016/j.ijdevneu.2019.08.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/06/2019] [Accepted: 08/09/2019] [Indexed: 10/26/2022] Open
Abstract
Adult human neural progenitor and stem cells have been implicated as a potential source of brain cancer causing cells, but specific events that might cause cells to progress towards a transformed phenotype remain unclear. The L1CAM (L1) cell adhesion/recognition molecule is expressed abnormally by human glioma cancer cells and is released as a large extracellular ectodomain fragment, which stimulates cell motility and proliferation. This study investigates the effects of ectopic overexpression of the L1 long ectodomain (L1LE; ˜180 kDa) on the motility, proliferation, and differentiation of human neural progenitor cells (HNPs). L1LE was ectopically expressed in HNPs using a lentiviral vector. Surprisingly, overexpression of L1LE resulted in reduced HNP motility in vitro, in stark contrast to the effects on glioma and other cancer cell types. L1LE overexpression resulted in a variable degree of maintenance of HNP proliferation in media without added growth factors but did not increase proliferation. In monolayer culture, HNPs expressed a variety of differentiation markers. L1LE overexpression resulted in loss of glutamine synthetase (GS) and β3-tubulin expression in normal HNP media, and reduced vimentin and increased GS expression in the absence of added growth factors. When co-cultured with chick embryonic brain cell aggregates, HNPs show increased differentiation potential. Some HNPs expressed p-neurofilaments and oligodendrocytic O4, indicating differentiation beyond that in monolayer culture. Most HNP-L1LE cells lost their vimentin and GFAP (glial fibrillary acidic protein) staining, and many cells were positive for astrocytic GS. However, these cells rarely were positive for neuronal markers β3-tubulin or p-neurofilaments, and few HNP oligodendrocyte progenitors were found. These results suggest that unlike for glioma cells, L1LE does not increase HNP cell motility, but rather decreases motility and influences the differentiation of normal brain progenitor cells. Therefore, the effect of L1LE on increasing motility and proliferation appears to be limited to already transformed cells.
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Affiliation(s)
- Michelle A Pusey
- Department of Biological Sciences, University of Delaware, Newark, DE, USA
| | - Karma Pace
- Department of Biological Sciences, University of Delaware, Newark, DE, USA
| | - Michele Fascelli
- Department of Biological Sciences, University of Delaware, Newark, DE, USA
| | - Paul J Linser
- Whitney Laboratory, University of Florida, St. Augustine, FL, USA
| | | | - Deni S Galileo
- Department of Biological Sciences, University of Delaware, Newark, DE, USA
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13
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Cross-Talk between Fibroblast Growth Factor Receptors and Other Cell Surface Proteins. Cells 2019; 8:cells8050455. [PMID: 31091809 PMCID: PMC6562592 DOI: 10.3390/cells8050455] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 05/08/2019] [Accepted: 05/13/2019] [Indexed: 12/14/2022] Open
Abstract
Fibroblast growth factors (FGFs) and their receptors (FGFRs) constitute signaling circuits that transmit signals across the plasma membrane, regulating pivotal cellular processes like differentiation, migration, proliferation, and apoptosis. The malfunction of FGFs/FGFRs signaling axis is observed in numerous developmental and metabolic disorders, and in various tumors. The large diversity of FGFs/FGFRs functions is attributed to a great complexity in the regulation of FGFs/FGFRs-dependent signaling cascades. The function of FGFRs is modulated at several levels, including gene expression, alternative splicing, posttranslational modifications, and protein trafficking. One of the emerging ways to adjust FGFRs activity is through formation of complexes with other integral proteins of the cell membrane. These proteins may act as coreceptors, modulating binding of FGFs to FGFRs and defining specificity of elicited cellular response. FGFRs may interact with other cell surface receptors, like G-protein-coupled receptors (GPCRs) or receptor tyrosine kinases (RTKs). The cross-talk between various receptors modulates the strength and specificity of intracellular signaling and cell fate. At the cell surface FGFRs can assemble into large complexes involving various cell adhesion molecules (CAMs). The interplay between FGFRs and CAMs affects cell–cell interaction and motility and is especially important for development of the central nervous system. This review summarizes current stage of knowledge about the regulation of FGFRs by the plasma membrane-embedded partner proteins and highlights the importance of FGFRs-containing membrane complexes in pathological conditions, including cancer.
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14
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Angiolini F, Belloni E, Giordano M, Campioni M, Forneris F, Paronetto MP, Lupia M, Brandas C, Pradella D, Di Matteo A, Giampietro C, Jodice G, Luise C, Bertalot G, Freddi S, Malinverno M, Irimia M, Moulton JD, Summerton J, Chiapparino A, Ghilardi C, Giavazzi R, Nyqvist D, Gabellini D, Dejana E, Cavallaro U, Ghigna C. A novel L1CAM isoform with angiogenic activity generated by NOVA2-mediated alternative splicing. eLife 2019; 8:44305. [PMID: 30829570 PMCID: PMC6398979 DOI: 10.7554/elife.44305] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 02/08/2019] [Indexed: 12/13/2022] Open
Abstract
The biological players involved in angiogenesis are only partially defined. Here, we report that endothelial cells (ECs) express a novel isoform of the cell-surface adhesion molecule L1CAM, termed L1-ΔTM. The splicing factor NOVA2, which binds directly to L1CAM pre-mRNA, is necessary and sufficient for the skipping of L1CAM transmembrane domain in ECs, leading to the release of soluble L1-ΔTM. The latter exerts high angiogenic function through both autocrine and paracrine activities. Mechanistically, L1-ΔTM-induced angiogenesis requires fibroblast growth factor receptor-1 signaling, implying a crosstalk between the two molecules. NOVA2 and L1-ΔTM are overexpressed in the vasculature of ovarian cancer, where L1-ΔTM levels correlate with tumor vascularization, supporting the involvement of NOVA2-mediated L1-ΔTM production in tumor angiogenesis. Finally, high NOVA2 expression is associated with poor outcome in ovarian cancer patients. Our results point to L1-ΔTM as a novel, EC-derived angiogenic factor which may represent a target for innovative antiangiogenic therapies. Growing tumors stimulate the formation of new blood vessels to supply the oxygen and nutrients the cancerous cells need to stay alive. Stopping tumors from forming the blood vessels could therefore help us to treat cancer. To do so, we need to understand how different proteins control when and how blood vessels develop. Cells make proteins by first ‘transcribing’ genes to form RNA molecules. In many cases, the RNA then goes through a process called alternative splicing. Proteins known as splicing factors cut out different segments of the RNA molecule and stick together the remaining segments to form templates for protein production. This enables a single gene to produce many different variants of a protein. Angiolini, Belloni, Giordano et al. have now studied mouse and human versions of the cells that line the blood vessels grown by tumors. This revealed that a splicing factor called NOVA2 targets a protein called L1CAM, which is normally responsible for gluing adjacent cells together. Angiolini et al. found that NOVA2 splices L1CAM into a form not seen before. Instead of remaining anchored to cell surfaces, the newly identified form of L1CAM is released into the blood circulation, where it stimulates new blood vessels to grow. Samples taken from the blood vessels of human ovarian tumors showed high levels of both NOVA2 and the modified form of L1CAM, while blood vessels in healthy tissue contain no, or very low levels of both proteins. Therefore, if the new form of L1CAM can be detected in the blood, it could be used to help cancer diagnosis, and to indicate which patients would benefit from treatments that restrict the growth of blood vessels in tumors. Further work is now needed to explore these possibilities.
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Affiliation(s)
- Francesca Angiolini
- Unit of Gynecological Oncology Research, Program of Gynecological Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Elisa Belloni
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche, Pavia, Italy
| | - Marco Giordano
- Unit of Gynecological Oncology Research, Program of Gynecological Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Matteo Campioni
- The Armenise-Harvard Laboratory of Structural Biology, Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Federico Forneris
- The Armenise-Harvard Laboratory of Structural Biology, Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Maria Paola Paronetto
- Department of Movement, Human and Health Sciences, Università degli Studi di Roma "Foro Italico", Rome, Italy
| | - Michela Lupia
- Unit of Gynecological Oncology Research, Program of Gynecological Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Chiara Brandas
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche, Pavia, Italy
| | - Davide Pradella
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche, Pavia, Italy.,Università degli Studi di Pavia, Pavia, Italy
| | - Anna Di Matteo
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche, Pavia, Italy
| | | | - Giovanna Jodice
- Molecular Medicine Program, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Chiara Luise
- Molecular Medicine Program, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Giovanni Bertalot
- Molecular Medicine Program, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Stefano Freddi
- Molecular Medicine Program, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | | | - Manuel Irimia
- Centre for Genomic Regulation, The Barcelona Institute of Science and Technology, Barcelona, Spain.,Universitat Pompeu Fabra, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | | | | | - Antonella Chiapparino
- The Armenise-Harvard Laboratory of Structural Biology, Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Carmen Ghilardi
- Laboratory of Biology and Treatment of Metastasis, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Raffaella Giavazzi
- Laboratory of Biology and Treatment of Metastasis, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Milan, Italy
| | - Daniel Nyqvist
- Division of Vascular Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Davide Gabellini
- Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Elisabetta Dejana
- FIRC Institute of Molecular Oncology, Milan, Italy.,Rudbeck Laboratory and Science for Life Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - Ugo Cavallaro
- Unit of Gynecological Oncology Research, Program of Gynecological Oncology, IEO, European Institute of Oncology IRCCS, Milan, Italy
| | - Claudia Ghigna
- Istituto di Genetica Molecolare, Consiglio Nazionale delle Ricerche, Pavia, Italy
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15
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Guo JC, Xie YM, Ran LQ, Cao HH, Sun C, Wu JY, Wu ZY, Liao LD, Zhao WJ, Fang WK, Li EM, Xu LY, Schachner M, Xie JJ. L1CAM drives oncogenicity in esophageal squamous cell carcinoma by stimulation of ezrin transcription. J Mol Med (Berl) 2017; 95:1355-1368. [PMID: 28939985 DOI: 10.1007/s00109-017-1595-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2016] [Revised: 09/09/2017] [Accepted: 09/13/2017] [Indexed: 12/24/2022]
Abstract
L1 cell adhesion molecule (L1CAM) is highly expressed in various types of human cancers, displaying yet unknown molecular mechanisms underlying their oncogenic potential. Here, we found that L1CAM expression was significantly increased in esophageal squamous cell carcinoma (ESCC; n = 157) lesions compared with non-cancerous tissues. High tumorous L1CAM expression significantly correlated with reduced overall survival. Experimentally, L1CAM knockdown led to decreased cell growth, migration, and invasiveness in vitro, whereas overexpression of L1CAM showed the opposite effect. In nude mice, L1CAM depletion attenuated tumorigenesis and ability to penetrate the tissues surrounding ESCC cells. Gene set enrichment analysis (GSEA) and SubpathwayMiner analysis on gene expression profiles (microarray data on ESCC tissues, GSE53625; cDNA microarray data on L1CAM-knockdown ESCC cell line, GSE86268) suggested that L1CAM-co-expression genes were related to cell motility, cell proliferation, and regulation of actin cytoskeleton, validating the above experimental findings. Further mechanistical analysis showed that L1CAM upregulated the expression of the cytoskeletal protein ezrin via activating integrin β1/MAPK/ERK/AP1 signaling and thus led to the malignant phenotypes of ESCC cells. Together, our findings suggest that L1CAM may be employed as a valuable prognosis marker and a therapeutic target for ESCC patients and that L1CAM promotes ESCC tumorigenicity by upregulating ezrin expression. KEY MESSAGES L1CAM promotes growth and invasiveness of ESCC cells in vitro and in vivo. L1CAM upregulates the expression of ezrin by integrin α5β1/MAPK/ERK/AP1 pathway. Ezrin is a key downstream effector in the L1CAM-promoted malignant phenotypes. High expression levels of both L1CAM and ezrin significantly correlated with reduced overall survival. Nuclear L1CAM is an independent prognosis marker for esophageal squamous cell carcinoma.
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Affiliation(s)
- Jin-Cheng Guo
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, No. 22 Xinling Road, Shantou, China
| | - Yang-Min Xie
- Department of Experimental Animal Center, Medical College of Shantou University, Shantou, China
| | - Li-Qiang Ran
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, No. 22 Xinling Road, Shantou, China
| | - Hui-Hui Cao
- Institute of Oncologic Pathology, Medical College of Shantou University, Shantou, China
| | - Chun Sun
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, No. 22 Xinling Road, Shantou, China
| | - Jian-Yi Wu
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, No. 22 Xinling Road, Shantou, China
| | - Zhi-Yong Wu
- Department of Oncologic Surgery, Shantou Central Hospital, Affiliated Shantou Hospital of Sun Yat-Sen University, Shantou, China
| | - Lian-Di Liao
- Institute of Oncologic Pathology, Medical College of Shantou University, Shantou, China
| | - Wei-Jiang Zhao
- Center for Neuroscience, Medical College of Shantou University, Shantou, China
| | - Wang-Kai Fang
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, No. 22 Xinling Road, Shantou, China
| | - En-Min Li
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, No. 22 Xinling Road, Shantou, China
| | - Li-Yan Xu
- Institute of Oncologic Pathology, Medical College of Shantou University, Shantou, China.
| | - Melitta Schachner
- Center for Neuroscience, Medical College of Shantou University, Shantou, China. .,W.M. Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, USA.
| | - Jian-Jun Xie
- Department of Biochemistry and Molecular Biology, Medical College of Shantou University, No. 22 Xinling Road, Shantou, China.
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16
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Samatov TR, Wicklein D, Tonevitsky AG. L1CAM: Cell adhesion and more. ACTA ACUST UNITED AC 2016; 51:25-32. [DOI: 10.1016/j.proghi.2016.05.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 05/20/2016] [Indexed: 12/17/2022]
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17
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Giacomini A, Chiodelli P, Matarazzo S, Rusnati M, Presta M, Ronca R. Blocking the FGF/FGFR system as a two-compartment antiangiogenic/antitumor approach in cancer therapy. Pharmacol Res 2016; 107:172-185. [DOI: 10.1016/j.phrs.2016.03.024] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Revised: 03/15/2016] [Accepted: 03/16/2016] [Indexed: 12/22/2022]
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18
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Cho S, Park I, Kim H, Jeong MS, Lim M, Lee ES, Kim JH, Kim S, Hong HJ. Generation, characterization and preclinical studies of a human anti-L1CAM monoclonal antibody that cross-reacts with rodent L1CAM. MAbs 2016; 8:414-25. [PMID: 26785809 PMCID: PMC5037990 DOI: 10.1080/19420862.2015.1125067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
L1 cell adhesion molecule (L1CAM) is aberrantly expressed in malignant tumors and plays important roles in tumor progression. Thus, L1CAM could serve as a therapeutic target and anti-L1CAM antibodies may have potential as anticancer agents. However, L1CAM is expressed in neural cells and the druggability of anti-L1AM antibody must be validated at the earliest stages of preclinical study. Here, we generated a human monoclonal antibody that is cross-reactive with mouse L1CAM and evaluated its pharmacokinetic properties and anti-tumor efficacy in rodent models. First, we selected an antibody (Ab4) that binds human and mouse L1CAM from the human naïve Fab library using phage display, then increased its affinity 45-fold through mutation of 3 residues in the complementarity-determining regions (CDRs) to generate Ab4M. Next, the affinity of Ab4M was increased 1.8-fold by yeast display of single-chain variable fragment containing randomly mutated light chain CDR3 to generate Ab417. The affinities (KD) of Ab417 for human and mouse L1CAM were 0.24 nM and 79.16 pM, respectively. Ab417 specifically bound the Ig5 domain of L1CAM and did not exhibit off-target activity, but bound to the peripheral nerves embedded in normal human tissues as expected in immunohistochemical analysis. In a pharmacokinetics study, the mean half-life of Ab417 was 114.49 h when a single dose (10 mg/kg) was intravenously injected into SD rats. Ab417 significantly inhibited tumor growth in a human cholangiocarcinoma xenograft nude mouse model and did not induce any adverse effect in in vivo studies. Thus, Ab417 may have potential as an anticancer agent.
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Affiliation(s)
- Seulki Cho
- a Department of Functional Genomics , University of Science & Technology , Daejeon , Korea.,b Institute of Bioscience and Biotechnology, Kangwon National University , Chuncheon , Korea
| | - Insoo Park
- c Immunotherapy Research Center, Korea Research Institute of Bioscience & Biotechnology , Daejeon , Korea
| | - Haejung Kim
- b Institute of Bioscience and Biotechnology, Kangwon National University , Chuncheon , Korea
| | - Mun Sik Jeong
- d Department of Systems Immunology , Kangwon National University , Chuncheon , Korea
| | - Mooney Lim
- d Department of Systems Immunology , Kangwon National University , Chuncheon , Korea
| | - Eung Suk Lee
- b Institute of Bioscience and Biotechnology, Kangwon National University , Chuncheon , Korea
| | - Jin Hong Kim
- b Institute of Bioscience and Biotechnology, Kangwon National University , Chuncheon , Korea
| | - Semi Kim
- c Immunotherapy Research Center, Korea Research Institute of Bioscience & Biotechnology , Daejeon , Korea
| | - Hyo Jeong Hong
- b Institute of Bioscience and Biotechnology, Kangwon National University , Chuncheon , Korea.,d Department of Systems Immunology , Kangwon National University , Chuncheon , Korea
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Cell Adhesion Molecules and Ubiquitination-Functions and Significance. BIOLOGY 2015; 5:biology5010001. [PMID: 26703751 PMCID: PMC4810158 DOI: 10.3390/biology5010001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 12/02/2015] [Accepted: 12/15/2015] [Indexed: 12/11/2022]
Abstract
Cell adhesion molecules of the immunoglobulin (Ig) superfamily represent the biggest group of cell adhesion molecules. They have been analyzed since approximately 40 years ago and most of them have been shown to play a role in tumor progression and in the nervous system. All members of the Ig superfamily are intensively posttranslationally modified. However, many aspects of their cellular functions are not yet known. Since a few years ago it is known that some of the Ig superfamily members are modified by ubiquitin. Ubiquitination has classically been described as a proteasomal degradation signal but during the last years it became obvious that it can regulate many other processes including internalization of cell surface molecules and lysosomal sorting. The purpose of this review is to summarize the current knowledge about the ubiquitination of cell adhesion molecules of the Ig superfamily and to discuss its potential physiological roles in tumorigenesis and in the nervous system.
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20
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Fan TP, Su YH. FGF signaling repertoire of the indirect developing hemichordate Ptychodera flava. Mar Genomics 2015; 24 Pt 2:167-75. [PMID: 26232261 DOI: 10.1016/j.margen.2015.07.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 07/20/2015] [Accepted: 07/20/2015] [Indexed: 02/05/2023]
Abstract
Fibroblast growth factors (FGFs) are a group of ligands that play multiple roles during development by transducing signals through FGF receptors (FGFRs) to downstream factors. At least 22 FGF ligands and 4 receptors have been identified in vertebrates, while six to eight FGF ligands and a single FGFR are present in invertebrate chordates, such as tunicates and amphioxus. The chordate FGFs can be categorized into at least seven subfamilies, and the members of which expanded during the evolution of early vertebrates. In contrast, only one FGF and two FGFRs have been found in sea urchins. Thus, it is unclear whether the FGF subfamilies duplicated in the lineage leading to the chordates, or sea urchins lost several fgf genes. Analyses of the FGF signaling repertoire in hemichordates, which together with echinoderms form the closest group to the chordates, may provide insights into the evolution of FGF signaling in deuterostomes. In this study, we identified five FGFs and three FGFRs from Ptychodera flava, an indirect-developing hemichordate acorn worm. Phylogenetic analyses revealed that hemichordates possess a conserved FGF8/17/18 in addition to several putative hemichordate-specific FGFs. Analyses of sequence similarity and protein domain organizations suggested that the sea urchin and hemichordate FGFRs arose from independent lineage-specific duplications. Furthermore, the acorn worm fgf and fgfr genes were demonstrated to be expressed during P. flava embryogenesis. These results set the foundations for further functional studies of FGF signaling in hemichordates and provided insights into the evolutionary history of the FGF repertoire.
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Affiliation(s)
- Tzu-Pei Fan
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan; Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; Graduate Institute of Biotechnology, National Chung-Hsing University, Taichung 40227, Taiwan
| | - Yi-Hsien Su
- Molecular and Biological Agricultural Sciences Program, Taiwan International Graduate Program, Academia Sinica, Taipei 11529, Taiwan; Institute of Cellular and Organismic Biology, Academia Sinica, Taipei 11529, Taiwan; Biotechnology Center, National Chung-Hsing University, Taichung 40227, Taiwan.
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Immunomodulator CD200 Promotes Neurotrophic Activity by Interacting with and Activating the Fibroblast Growth Factor Receptor. Mol Neurobiol 2014; 53:584-594. [DOI: 10.1007/s12035-014-9037-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 11/30/2014] [Indexed: 11/26/2022]
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22
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Beesley PW, Herrera-Molina R, Smalla KH, Seidenbecher C. The Neuroplastin adhesion molecules: key regulators of neuronal plasticity and synaptic function. J Neurochem 2014; 131:268-83. [PMID: 25040546 DOI: 10.1111/jnc.12816] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 07/02/2014] [Accepted: 07/03/2014] [Indexed: 01/21/2023]
Abstract
The Neuroplastins Np65 and Np55 are neuronal and synapse-enriched immunoglobulin superfamily molecules that play important roles in a number of key neuronal and synaptic functions including, for Np65, cell adhesion. In this review we focus on the physiological roles of the Neuroplastins in promoting neurite outgrowth, regulating the structure and function of both inhibitory and excitatory synapses in brain, and in neuronal and synaptic plasticity. We discuss the underlying molecular and cellular mechanisms by which the Neuroplastins exert their physiological effects and how these are dependent upon the structural features of Np65 and Np55, which enable them to bind to a diverse range of protein partners. In turn this enables the Neuroplastins to interact with a number of key neuronal signalling cascades. These include: binding to and activation of the fibroblast growth factor receptor; Np65 trans-homophilic binding leading to activation of p38 MAPK and internalization of glutamate (GluR1) receptor subunits; acting as accessory proteins for monocarboxylate transporters, thus affecting neuronal energy supply, and binding to GABAA α1, 2 and 5 subunits, thus regulating the composition and localization of GABAA receptors. An emerging theme is the role of the Neuroplastins in regulating the trafficking and subcellular localization of specific binding partners. We also discuss the involvement of Neuroplastins in a number of pathophysiological conditions, including ischaemia, schizophrenia and breast cancer and the role of a single nucleotide polymorphism in the human Neuroplastin (NPTN) gene locus in impairment of cortical development and cognitive functions. Neuroplastins are neuronal cell adhesion molecules, which induce neurite outgrowth and play important roles in synaptic maturation and plasticity. This review summarizes the functional implications of Neuroplastins for correct synaptic membrane protein localization, neuronal energy supply, expression of LTP and LTD, animal and human behaviour, and pathophysiology and disease. It focuses particularly on Neuroplastin binding partners and signalling mechanisms, and proposes perspectives for future research on these important immunoglobulin superfamily members.
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Affiliation(s)
- Philip W Beesley
- School of Biological Sciences, Royal Holloway University of London, Egham, UK
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Valiente M, Obenauf AC, Jin X, Chen Q, Zhang XHF, Lee DJ, Chaft JE, Kris MG, Huse JT, Brogi E, Massagué J. Serpins promote cancer cell survival and vascular co-option in brain metastasis. Cell 2014; 156:1002-16. [PMID: 24581498 PMCID: PMC3988473 DOI: 10.1016/j.cell.2014.01.040] [Citation(s) in RCA: 570] [Impact Index Per Article: 57.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 09/16/2013] [Accepted: 01/14/2014] [Indexed: 12/24/2022]
Abstract
Brain metastasis is an ominous complication of cancer, yet most cancer cells that infiltrate the brain die of unknown causes. Here, we identify plasmin from the reactive brain stroma as a defense against metastatic invasion, and plasminogen activator (PA) inhibitory serpins in cancer cells as a shield against this defense. Plasmin suppresses brain metastasis in two ways: by converting membrane-bound astrocytic FasL into a paracrine death signal for cancer cells, and by inactivating the axon pathfinding molecule L1CAM, which metastatic cells express for spreading along brain capillaries and for metastatic outgrowth. Brain metastatic cells from lung cancer and breast cancer express high levels of anti-PA serpins, including neuroserpin and serpin B2, to prevent plasmin generation and its metastasis-suppressive effects. By protecting cancer cells from death signals and fostering vascular co-option, anti-PA serpins provide a unifying mechanism for the initiation of brain metastasis in lung and breast cancers.
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Affiliation(s)
- Manuel Valiente
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Anna C Obenauf
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Xin Jin
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Qing Chen
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Xiang H-F Zhang
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Derek J Lee
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Jamie E Chaft
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Mark G Kris
- Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Jason T Huse
- Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Brain Tumor Center, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Edi Brogi
- Department of Pathology, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Joan Massagué
- Cancer Biology and Genetics Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Brain Tumor Center, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Metastasis Research Center, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Howard Hughes Medical Institute, Chevy Chase, MD 21205, USA.
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Beesley P, Kraus M, Parolaro N. The neuroplastins: multifunctional neuronal adhesion molecules--involvement in behaviour and disease. ADVANCES IN NEUROBIOLOGY 2014; 8:61-89. [PMID: 25300133 DOI: 10.1007/978-1-4614-8090-7_4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The neuroplastins np65 and np55 are neuronal and synapse-enriched immunoglobulin (Ig) superfamily cell adhesion molecules that contain 3 and 2 Ig domains, respectively. Np65 is neuron specific whereas np55 is expressed in many tissues. They are multifunctional proteins whose physiological roles are defined by the partner proteins they bind to and the signalling pathways they activate. The neuroplastins are implicated in activity-dependent long-term synaptic plasticity. Thus neuroplastin-specific antibodies and a recombinant peptide inhibit long-term potentiation in hippocampal neurones. This is mediated by activation of the p38MAP kinase signalling pathway, resulting in the downregulation of the surface expression of GluR1 receptors. Np65, but not np55, exhibits trans-homophilic binding. Both np65 and np55 induce neurite outgrowth and both activate the FGF receptor and associated downstream signalling pathways. Np65 binds to and colocalises with GABA(A) receptor subtypes and may play a role in anchoring them to specific synaptic and extrasynaptic sites. Most recently the neuroplastins have been shown to chaperone and support the monocarboxylate transporter MCT2 in transporting lactate across the neuronal plasma membrane. Thus the neuroplastins are multifunctional adhesion molecules which support neurite outgrowth, modulate long-term activity-dependent synaptic plasticity, regulate surface expression of GluR1 receptors, modulate GABA(A) receptor localisation, and play a key role in delivery of monocarboxylate energy substrates both to the synapse and to extrasynaptic sites. The diverse functions and range of signalling pathways activated by the neuroplastins suggest that they are important in modulating behaviour and in relation to human disease.
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Sheng L, Leshchyns'ka I, Sytnyk V. Cell adhesion and intracellular calcium signaling in neurons. Cell Commun Signal 2013; 11:94. [PMID: 24330678 PMCID: PMC3878801 DOI: 10.1186/1478-811x-11-94] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2013] [Accepted: 12/05/2013] [Indexed: 01/10/2023] Open
Abstract
Cell adhesion molecules (CAMs) play indispensable roles in the developing and mature brain by regulating neuronal migration and differentiation, neurite outgrowth, axonal fasciculation, synapse formation and synaptic plasticity. CAM-mediated changes in neuronal behavior depend on a number of intracellular signaling cascades including changes in various second messengers, among which CAM-dependent changes in intracellular Ca2+ levels play a prominent role. Ca2+ is an essential secondary intracellular signaling molecule that regulates fundamental cellular functions in various cell types, including neurons. We present a systematic review of the studies reporting changes in intracellular Ca2+ levels in response to activation of the immunoglobulin superfamily CAMs, cadherins and integrins in neurons. We also analyze current experimental evidence on the Ca2+ sources and channels involved in intracellular Ca2+ increases mediated by CAMs of these families, and systematically review the role of the voltage-dependent Ca2+ channels (VDCCs) in neurite outgrowth induced by activation of these CAMs. Molecular mechanisms linking CAMs to VDCCs and intracellular Ca2+ stores in neurons are discussed.
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Affiliation(s)
| | | | - Vladimir Sytnyk
- School of Biotechnology and Biomolecular Sciences, The University of New South Wales, Sydney, New South Wales 2052, Australia.
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Tagliavacca L, Colombo F, Racchetti G, Meldolesi J. L1CAM and its cell-surface mutants: new mechanisms and effects relevant to the physiology and pathology of neural cells. J Neurochem 2012; 124:397-409. [PMID: 22973895 PMCID: PMC3557714 DOI: 10.1111/jnc.12015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 09/05/2012] [Accepted: 09/08/2012] [Indexed: 11/27/2022]
Abstract
The L1 syndrome, a genetic disease that affects 1/30 000 newborn males, is sustained by numerous missense mutations of L1 cell adhesion molecule (L1CAM), an adhesion surface protein active also in transmembrane signaling, essential for the development and function of neurons. To investigate the cell biology of L1CAM, we employed a high RE1-silencing transcription (factor) clone of the pheochromocytoma PC12 line, defective in L1CAM expression and neurite outgrowth. The clone was transfected with wild-type L1CAM and four missense, disease-inducing point mutants encoding proteins distributed to the cell surface. The mutant-expressing cells, defective in adhesion to extracellular matrix proteins and in migration, exhibited unchanged proliferation. The nerve growth factor (NGF)-induced neurite outgrowth was re-established in defective clone cells transfected with the wild-type and the H210Q and I219T L1CAMs mutants, but not in the others. The stimulated outgrowth was confirmed in a second defective PC12 clone over-expressing the NGF receptor TrkA, treated with NGF and/or a recombinant L1CAM chimera. These results revealed a new function of L1CAM, a positive, robust and dose-dependent modulation of the TrkA receptor activated spontaneously or by NGF. The variable effects observed with the different L1CAM mutants suggest that this function contributes to the marked heterogeneity of symptoms and severity observed in the patients affected by the L1 syndrome.
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Affiliation(s)
- Luigina Tagliavacca
- Department of Neuroscience, Vita-Salute San Raffaele University and San Raffaele Institute, Milano, Italy
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Mohanan V, Temburni MK, Kappes JC, Galileo DS. L1CAM stimulates glioma cell motility and proliferation through the fibroblast growth factor receptor. Clin Exp Metastasis 2012; 30:507-20. [DOI: 10.1007/s10585-012-9555-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Accepted: 11/17/2012] [Indexed: 02/07/2023]
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Bojesen KB, Clausen O, Rohde K, Christensen C, Zhang L, Li S, Køhler L, Nielbo S, Nielsen J, Gjørlund MD, Poulsen FM, Bock E, Berezin V. Nectin-1 binds and signals through the fibroblast growth factor receptor. J Biol Chem 2012; 287:37420-33. [PMID: 22955284 DOI: 10.1074/jbc.m112.345215] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Nectins belong to a family of immunoglobulin (Ig)-like cell-adhesion molecules comprising four members, nectin-1 through nectin-4. Nectins are involved in formation of the mechanical adhesive puncta adherentia junctions of synapses. Nectins share the same overall structural topology with an extracellular region containing three Ig modules, a transmembrane region, and a cytoplasmic region. In nectin-1, the first and second Ig module in the extracellular region are necessary for the trans-interaction with nectin-3 and formation of cis-dimers, respectively. The function of the third Ig module of nectin-1 remains unknown. We here report the structure in solution of the third, membrane-proximal Ig module of mouse nectin-1 (nectin-1 Ig3) solved by means of nuclear magnetic resonance (NMR) spectroscopy. It belongs to the C1 set of the Ig superfamily. Nectin-1 Ig3 was produced as a recombinant protein and induced neurite outgrowth in primary cultures of hippocampal and cerebellar granule neurons, an effect abolished by treatment with the fibroblast growth factor receptor (FGFR) inhibitor SU5402, or by transfection with a dominant-negative FGFR1 construct. We showed by surface plasmon resonance (SPR) analysis that nectin-1 Ig3 directly interacted with various isoforms of FGFR. Nectin-1 Ig3 induced phosphorylation of FGFR1c in the same manner as the whole nectin-1 ectodomain, and promoted survival of cerebellar granule neurons induced to undergo apoptosis. Finally, we constructed a peptide, nectide, by employing in silico modeling of various FGFR ligand-binding sites. Nectide mimicked all the effects of nectin-1 Ig3. We suggest that FGFR is a downstream signaling partner of nectin-1.
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Affiliation(s)
- Kirsten B Bojesen
- Protein Laboratory, Department of Neuroscience and Pharmacology, Panum Institute, Blegdamsvej 3C, DK-2200 Copenhagen, Denmark
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Gjørlund MD, Nielsen J, Pankratova S, Li S, Korshunova I, Bock E, Berezin V. Neuroligin-1 induces neurite outgrowth through interaction with neurexin-1β and activation of fibroblast growth factor receptor-1. FASEB J 2012; 26:4174-86. [PMID: 22750515 DOI: 10.1096/fj.11-202242] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Neurexin-1 (NRXN1) and neuroligin-1 (NLGN1) are synaptic cell adhesion molecules that connect pre- and postsynaptic neurons at synapses and mediate signaling across the synapse, which modulates synaptic activity and determines the properties of neuronal networks. Defects in the genes encoding NLGN1 have been linked to cognitive diseases such as autism. The roles of both NRXN1 and NLGN1 during synaptogenesis have been studied extensively, but little is known about the role of these molecules in neuritogenesis, which eventually results in neuronal circuitry formation. The present study investigated the neuritogenic effect of NLGN1 in cultures of hippocampal neurons. Our results show that NLGN1, both in soluble and membrane-bound forms, induces neurite outgrowth that depends on the interaction with NRXN1β and on activation of fibroblast growth factor receptor-1. In addition, we demonstrate that a synthetic peptide, termed neurolide, which is modeled after a part of the binding interface of NLGN1 for NRXN1β, can bind to NRXN1β and mimic the biological properties of NLGN1 in vitro.
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Affiliation(s)
- Michelle D Gjørlund
- Protein Laboratory, Department of Neuroscience and Pharmacology, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3B, Building 24.2, DK-2200 Copenhagen, Denmark
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Kim KS, Min JK, Liang ZL, Lee K, Lee JU, Bae KH, Lee MH, Lee SE, Ryu MJ, Kim SJ, Kim YK, Choi MJ, Jo YS, Kim JM, Shong M. Aberrant l1 cell adhesion molecule affects tumor behavior and chemosensitivity in anaplastic thyroid carcinoma. Clin Cancer Res 2012; 18:3071-8. [PMID: 22472175 DOI: 10.1158/1078-0432.ccr-11-2757] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Anaplastic thyroid carcinoma (ATC) is one of the most invasive human cancers and has a poor prognosis. Molecular targets of ATC that determine its highly aggressive nature remain unidentified. This study investigated L1 cell adhesion molecule (L1CAM) expression and its role in tumorigenesis of ATCs. EXPERIMENTAL DESIGN Expression of L1CAM in thyroid cancer was evaluated by immunohistochemical analyses of tumor samples from patients with thyroid cancer. We investigated the role of L1CAM in proliferation, migration, invasion, and chemoresistance using short hairpin RNA (shRNA) knockdown experiments in human ATC cell lines. Finally, we evaluated the role of L1CAM on tumorigenesis with ATC xenograft assay in a nude mouse model. RESULTS L1CAM expression was not detectable in normal follicular epithelial cells of the thyroid or in differentiated thyroid carcinoma. In contrast, analysis of ATC samples showed specifically higher expression of L1CAM in the invasive area of the tumor. Specific knockdown of L1CAM in the ATC cell lines, FRO and 8505C, caused a significant decrease in the proliferative, migratory, and invasive capabilities of the cells. Suppression of L1CAM expression in ATC cell lines increased chemosensitivity to gemcitabine or paclitaxel. Finally, in an ATC xenograft model, depletion of L1CAM markedly reduced tumor growth and increased the survival of tumor-bearing mice. CONCLUSIONS We report that L1CAM is highly expressed in the samples taken from patients with ATCs. L1CAM plays an important role in determining tumor behavior and chemosensitivity in cell lines derived from ATCs. Therefore, we suggest that L1CAM may be an important therapeutic target in patients with ATCs.
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Affiliation(s)
- Koon Soon Kim
- Research Center for Endocrinology and Metabolic Diseases, Division of Endocrinology, Department of Internal Medicine, Chungnam National University School of Medicine, Daejeon, South Korea
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Son YS, Seong RH, Ryu CJ, Cho YS, Bae KH, Chung SJ, Lee B, Min JK, Hong HJ. Brief report: L1 cell adhesion molecule, a novel surface molecule of human embryonic stem cells, is essential for self-renewal and pluripotency. Stem Cells 2012; 29:2094-9. [PMID: 21957033 DOI: 10.1002/stem.754] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Despite the recent identification of surface markers of undifferentiated human embryonic stem cells (hESCs), the crucial cell-surface molecules that regulate the self-renewal capacity of hESCs remain largely undefined. Here, we generated monoclonal antibodies (MAbs) that specifically bind to undifferentiated hESCs but not to mouse embryonic stem cells. Among these antibodies, we selected a novel MAb, 4-63, and identified its target antigen as the L1 cell adhesion molecule (L1CAM) isoform 2. Notably, L1CAM expressed in hESCs lacked the neuron-specific YEGHH and RSLE peptides encoded by exons 2 and 27, respectively. L1CAM colocalized with hESC-specific cell-surface markers, and its expression was markedly downregulated on differentiation. Stable L1CAM depletion markedly decreased hESC proliferation, whereas L1CAM overexpression increased proliferation. In addition, the expression of octamer-binding transcription factor 4, Nanog, sex-determining region Y-box 2, and stage-specific embryonic antigen (SSEA)-3 was markedly downregulated, whereas lineage-specific markers and SSEA-1 were upregulated in L1CAM-depleted hESCs. Interestingly, the actions of L1CAM in regulating the proliferation and differentiation of hESCs were exerted predominantly through the fibroblast growth factor receptor 1 signaling pathway. Taken together, our results suggest that L1CAM is a novel cell-surface molecule that plays an important role in the maintenance of self-renewal and pluripotency in hESCs.
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Affiliation(s)
- Yeon Sung Son
- Therapeutic Antibody Research Center, Korea Research Institute of Bioscience & Biotechnology, Daejeon, Republic of Korea
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Mikulak J, Negrini S, Klajn A, D'Alessandro R, Mavilio D, Meldolesi J. Dual REST-dependence of L1CAM: from gene expression to alternative splicing governed by Nova2 in neural cells. J Neurochem 2012; 120:699-709. [PMID: 22176577 DOI: 10.1111/j.1471-4159.2011.07626.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
L1 cell adhesion molecule (L1CAM), an adhesion/signaling protein encoded by a gene target of the transcription repressor RE-1-Silencing Transcription factor (REST), is expressed in two alternatively spliced isoforms. The full-length isoform, typical of low-REST neural cells, plays key roles in survival/migration, outgrowth/fasciculation/regeneration of axons, synaptic plasticity; the isoform missing two mini-exons, abundant in a few high-REST non-neural cells, maintains some effect on migration and proliferation. To investigate whether and how L1CAM alternative splicing depends on REST we used neural cell models expressing low or high levels of REST (PC12, SH-SY5Y, differentiated NT2/D1 and primary neurons transduced or not with REST). The short isoform was found to rise when the low-REST levels of neural cells were experimentally increased, while the full-length isoform increased in high-REST cells when the repressor tone was attenuated. These results were due to Nova2, a neural cell-specific splicing factor shown here to be repressed by REST. REST control of L1CAM occurs therefore by two mechanisms, transcription and alternative splicing. The splicing mechanism, affecting not only L1CAM but all Nova2 targets (∼7% of brain-specific splicing, including the mRNAs of other adhesion and synaptic proteins) is expected to be critical during development and important also for the structure and function of mature neural cells.
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Linking L1CAM-mediated signaling to NF-κB activation. Trends Mol Med 2010; 17:178-87. [PMID: 21195665 DOI: 10.1016/j.molmed.2010.11.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Revised: 11/19/2010] [Accepted: 11/19/2010] [Indexed: 01/13/2023]
Abstract
The cell adhesion molecule L1 (L1CAM) was originally identified as a neural adhesion molecule essential for neurite outgrowth and axon guidance. Many studies have now shown that L1CAM is overexpressed in human carcinomas and associated with poor prognosis. So far, L1CAM-mediated cellular signaling has been largely attributed to an association with growth factor receptors, referred to as L1CAM-'assisted' signaling. New data demonstrate that L1CAM can signal via two additional mechanisms: 'forward' signaling via regulated intramembrane proteolysis and 'reverse' signaling via the activation of the transcription factor nuclear factor (NF)-κB. Taken together, these findings lead to a new understanding of L1CAM downstream signaling that is fundamental for the development of anti-L1CAM antibody-mediated therapeutics in human tumor cells.
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Gene expression of axon growth promoting factors in the deer antler. PLoS One 2010; 5:e15706. [PMID: 21187928 PMCID: PMC3004953 DOI: 10.1371/journal.pone.0015706] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Accepted: 11/18/2010] [Indexed: 11/19/2022] Open
Abstract
The annual regeneration cycle of deer (Cervidae, Artiodactyla) antlers represents a unique model of epimorphic regeneration and rapid growth in adult mammals. Regenerating antlers are innervated by trigeminal sensory axons growing through the velvet, the modified form of skin that envelopes the antler, at elongation velocities that reach one centimetre per day in the common deer (Cervus elaphus). Several axon growth promoters like NT-3, NGF or IGF-1 have been described in the antler. To increase the knowledge on the axon growth environment, we have combined different gene-expression techniques to identify and characterize the expression of promoting molecules not previously described in the antler velvet. Cross-species microarray analyses of deer samples on human arrays allowed us to build up a list of 90 extracellular or membrane molecules involved in axon growth that were potentially being expressed in the antler. Fifteen of these genes were analysed using PCR and sequencing techniques to confirm their expression in the velvet and to compare it with the expression in other antler and skin samples. Expression of 8 axon growth promoters was confirmed in the velvet, 5 of them not previously described in the antler. In conclusion, our work shows that antler velvet provides growing axons with a variety of promoters of axon growth, sharing many of them with deer's normal and pedicle skin.
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Murcia-Belmonte V, Esteban PF, García-González D, De Castro F. Biochemical dissection of Anosmin-1 interaction with FGFR1 and components of the extracellular matrix. J Neurochem 2010; 115:1256-65. [PMID: 20874775 DOI: 10.1111/j.1471-4159.2010.07024.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Anosmin-1, defective in Kallmann's syndrome, participates in the adhesion, migration and differentiation of different cell types in the CNS. Although not fully understood, the mechanisms of action of Anosmin-1 involve the interaction with different proteins, being the interaction with fibroblast growth factor receptor 1 (FGFR1) and the modulation of its signalling the best studied to date. Using glutathione-S-transferase pull-down assays we demonstrate that the FnIII.3 (Fibronectin-like type III) domain and the combination whey acidic protein-FnIII.1, but not each of them individually, interact with FGFR1. The interaction of the whey acidic protein-FnIII.1 domains is substantially reduced when the cysteine-rich region is present, suggesting a likely regulatory role for this domain. The introduction in FnIII.3 of any of the two missense mutations found in Kallmann's syndrome patients, E514K and F517L, abolished the interaction with FGFR1, what suggests an important role for these residues in the interaction. Interestingly, the chemoattraction of Anosmin-1 on rat neuronal precursors (NPs) via FGFR1 is retained by the N-terminal region of Anosmin-1 but not by FnIII.3 alone, and is lost in proteins carrying either one of the missense mutations, probably because of a highly reduced binding capacity to FGFR1. We also describe homophilic interaction Anosmin-1/Anosmin-1 via the FnIII repeats 1 and 4, and the interaction of FnIII.1 and FnIII.3 with Fibronectin and of FnIII.3 with Laminin.
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Chen L, Zhou S. "CRASH"ing with the worm: insights into L1CAM functions and mechanisms. Dev Dyn 2010; 239:1490-501. [PMID: 20225255 DOI: 10.1002/dvdy.22269] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The L1 family of cell adhesion molecules (L1CAMs) in vertebrates has long been studied for its roles in nervous system development and function. Members of this family have been associated with distinct neurological disorders that include CRASH, autism, 3p syndrome, and schizophrenia. The conservation of L1CAMs in Drosophila and Caenorhabditis elegans allows the opportunity to take advantage of these simple model organisms and their accessible genetic manipulations to dissect L1CAM functions and mechanisms of action. This review summarizes the discoveries of L1CAMs made in C. elegans, showcasing this simple model organism as a powerful system to uncover L1CAM mechanisms and roles in healthy and diseased states.
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Affiliation(s)
- Lihsia Chen
- Department of Genetics, Cell Biology, and Development, Developmental Biology Center, University of Minnesota, Minneapolis, Minnesota 55455, USA.
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Neuritogenic and neuroprotective properties of peptide agonists of the fibroblast growth factor receptor. Int J Mol Sci 2010; 11:2291-305. [PMID: 20640153 PMCID: PMC2904917 DOI: 10.3390/ijms11062291] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Accepted: 05/21/2010] [Indexed: 11/17/2022] Open
Abstract
Fibroblast growth factor receptors (FGFRs) interact with their cognate ligands, FGFs, and with a number of cell adhesion molecules (CAMs), such as the neural cell adhesion molecule (NCAM), mediating a wide range of events during the development and maintenance of the nervous system. Determination of protein structure, in silico modeling and biological studies have recently resulted in the identification of FGFR binding peptides derived from various FGFs and NCAM mimicking the effects of these molecules with regard to their neuritogenic and neuroprotective properties. This review focuses on recently developed functional peptide agonists of FGFR with possible therapeutic potential.
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Rudenko O, Tkach V, Berezin V, Bock E. Effects of FGF receptor peptide agonists on animal behavior under normal and pathological conditions. Neurosci Res 2010; 68:35-43. [PMID: 20562017 DOI: 10.1016/j.neures.2010.05.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 04/25/2010] [Accepted: 05/10/2010] [Indexed: 01/19/2023]
Abstract
Hexafins are recently identified low-molecular-weight peptide agonists of the fibroblast growth factor receptor (FGFR), derived from the beta6-beta7 loop region of various FGFs. Synthetic hexafin peptides have been shown to bind to and induce tyrosine phosphorylation of FGFR1, stimulate neurite outgrowth, and promote neuronal survival in vitro. Thus, the pronounced biological activities of hexafins in vitro make them attractive compounds for pharmacological studies in vivo. The present study investigated the effects of subcutaneous administration of hexafin1 and hexafin2 (peptides derived from FGF1 and FGF2, respectively) on social memory, exploratory activity, and anxiety-like behavior in adult rats. Treatment with hexafin1 and hexafin2 resulted in prolonged retention of social memory. Furthermore, rats treated with hexafin2 exhibited decreased anxiety-like behavior in the elevated plus maze. Employing an R6/2 mouse model of Huntington's disease (HD), we found that although hexafin2 did not affect the progression of motor symptoms, it alleviated deficits in activity related to social behavior, including sociability and social novelty. Thus, hexafin2 may have therapeutic potential for the treatment of HD.
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Affiliation(s)
- Olga Rudenko
- Protein Laboratory, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark.
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Nakamura Y, Lee S, Haddox CL, Weaver EJ, Lemmon VP. Role of the cytoplasmic domain of the L1 cell adhesion molecule in brain development. J Comp Neurol 2010; 518:1113-32. [PMID: 20127821 DOI: 10.1002/cne.22267] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Mutations in the human L1CAM gene cause X-linked hydrocephalus and MASA (Mental retardation, Aphasia, Shuffling gait, Adducted thumbs) syndrome. In vitro studies have shown that the L1 cytoplasmic domain (L1CD) is involved in L1 trafficking, neurite branching, signaling, and interactions with the cytoskeleton. L1cam knockout (L1(KO)) mice have hydrocephalus, a small cerebellum, hyperfasciculation of corticothalamic tracts, and abnormal peripheral nerves. To explore the function of the L1CD, we made three new mice lines in which different parts of the L1CD have been altered. In all mutant lines L1 protein is expressed and transported into the axon. Interestingly, these new L1CD mutant lines display normal brain morphology. However, the expression of L1 protein in the adult is dramatically reduced in the two L1CD mutant lines that lack the ankyrin-binding region and they show defects in motor function. Therefore, the L1CD is not responsible for the major defects observed in L1(KO) mice, yet it is required for continued L1 protein expression and motor function in the adult.
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Affiliation(s)
- Yukiko Nakamura
- The Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, Florida 33136, USA
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40
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Rich RL, Myszka DG. Grading the commercial optical biosensor literature-Class of 2008: 'The Mighty Binders'. J Mol Recognit 2010; 23:1-64. [PMID: 20017116 DOI: 10.1002/jmr.1004] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Optical biosensor technology continues to be the method of choice for label-free, real-time interaction analysis. But when it comes to improving the quality of the biosensor literature, education should be fundamental. Of the 1413 articles published in 2008, less than 30% would pass the requirements for high-school chemistry. To teach by example, we spotlight 10 papers that illustrate how to implement the technology properly. Then we grade every paper published in 2008 on a scale from A to F and outline what features make a biosensor article fabulous, middling or abysmal. To help improve the quality of published data, we focus on a few experimental, analysis and presentation mistakes that are alarmingly common. With the literature as a guide, we want to ensure that no user is left behind.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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41
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Tapanes-Castillo A, Weaver EJ, Smith RP, Kamei Y, Caspary T, Hamilton-Nelson KL, Slifer SH, Martin ER, Bixby JL, Lemmon VP. A modifier locus on chromosome 5 contributes to L1 cell adhesion molecule X-linked hydrocephalus in mice. Neurogenetics 2010; 11:53-71. [PMID: 19565280 PMCID: PMC2863031 DOI: 10.1007/s10048-009-0203-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Accepted: 06/08/2009] [Indexed: 12/25/2022]
Abstract
Humans with L1 cell adhesion molecule (L1CAM) mutations exhibit X-linked hydrocephalus, as well as other severe neurological disorders. L1-6D mutant mice, which are homozygous for a deletion that removes the sixth immunoglobulin-like domain of L1cam, seldom display hydrocephalus on the 129/Sv background. However, the same L1-6D mutation produces severe hydrocephalus on the C57BL/6J background. To begin to understand how L1cam deficiencies result in hydrocephalus and to identify modifier loci that contribute to X-linked hydrocephalus by genetically interacting with L1cam, we conducted a genome-wide scan on F2 L1-6D mice, bred from L1-6D 129S2/SvPasCrlf and C57BL/6J mice. Linkage studies, utilizing chi-square tests and quantitative trait loci mapping techniques, were performed. Candidate modifier loci were further investigated in an extension study. Linkage was confirmed for a locus on chromosome 5, which we named L1cam hydrocephalus modifier 1 (L1hydro1), p = 4.04 X 10(-11).
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Affiliation(s)
- Alexis Tapanes-Castillo
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Lois Pope LIFE Center, Room 4-16, 1095 NW 14th Terrace, Miami, FL 33136, USA
| | - Eli J. Weaver
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Lois Pope LIFE Center, Room 4-16, 1095 NW 14th Terrace, Miami, FL 33136, USA, Department of Neuroscience, Case Western Reserve University, Cleveland, OH, USA
| | - Robin P. Smith
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Lois Pope LIFE Center, Room 4-16, 1095 NW 14th Terrace, Miami, FL 33136, USA, Neuroscience Program, University of Miami, Miami, FL, USA
| | - Yoshimasa Kamei
- Department of Neuroscience, Case Western Reserve University, Cleveland, OH, USA
| | - Tamara Caspary
- Department of Human Genetics, Emory University, Atlanta, GA, USA
| | - Kara L. Hamilton-Nelson
- Dr. John T. MacDonald Foundation, Department of Human Genetics, Miami Institute for Human Genomics, University of Miami, Miami, FL, USA
| | - Susan H. Slifer
- Dr. John T. MacDonald Foundation, Department of Human Genetics, Miami Institute for Human Genomics, University of Miami, Miami, FL, USA
| | - Eden R. Martin
- Dr. John T. MacDonald Foundation, Department of Human Genetics, Miami Institute for Human Genomics, University of Miami, Miami, FL, USA
| | - John L. Bixby
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Lois Pope LIFE Center, Room 4-16, 1095 NW 14th Terrace, Miami, FL 33136, USA, Neuroscience Program, University of Miami, Miami, FL, USA, Department of Neurological Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA, Department of Molecular and Cellular Pharmacology, Miller School of Medicine, University of Miami, Miami, FL, USA
| | - Vance P. Lemmon
- The Miami Project to Cure Paralysis, Miller School of Medicine, University of Miami, Lois Pope LIFE Center, Room 4-16, 1095 NW 14th Terrace, Miami, FL 33136, USA, Department of Neuroscience, Case Western Reserve University, Cleveland, OH, USA, Neuroscience Program, University of Miami, Miami, FL, USA, Department of Neurological Surgery, Miller School of Medicine, University of Miami, Miami, FL, USA
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Nielsen J, Kulahin N, Walmod PS. Extracellular protein interactions mediated by the neural cell adhesion molecule, NCAM: heterophilic interactions between NCAM and cell adhesion molecules, extracellular matrix proteins, and viruses. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2010; 663:23-53. [PMID: 20017013 DOI: 10.1007/978-1-4419-1170-4_2] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Janne Nielsen
- Protein Laboratory, Department of Neuroscience and Pharmacology, University of Copenhagen, Copenhagen, Denmark
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Owczarek S, Kiryushko D, Larsen MH, Kastrup JS, Gajhede M, Sandi C, Berezin V, Bock E, Soroka V. Neuroplastin-55 binds to and signals through the fibroblast growth factor receptor. FASEB J 2009; 24:1139-50. [PMID: 19952283 DOI: 10.1096/fj.09-140509] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Neuroplastin (Np) is a glycoprotein belonging to the immunoglobulin superfamily of cell adhesion molecules (CAMs) and existing in two isoforms, Np55 and Np65, named according to their molecular weights. The extracellular part of Np65 contains three immunoglobulin (Ig)-like modules (Ig1, Ig2, and Ig3), whereas Np55 lacks the Ig1 module. Of these two isoforms, only Np65 is involved in homophilic interactions resulting in cell adhesion, whereas the role of Np55 is poorly understood. The present study reports for the first time the crystal structure of the ectodomain of Np55 at 1.95-A resolution and demonstrates that Np55 binds to and activates the fibroblast growth factor receptor 1 (FGFR1). Furthermore, we identify a sequence motif in the Ig2 module of Np55 interacting with FGFR1 and show that a synthetic peptide encompassing this motif, termed narpin, binds to and activates FGFR1. We show that both Np55 and the narpin peptide induce neurite outgrowth through FGFR1 activation and that Np55 increases synaptic calcium concentration in an FGFR1-dependent manner. Moreover, we demonstrate that narpin has an antidepressive-like effect in rats subjected to the forced swim test, suggesting that Np55-induced signaling may be involved in synaptic plasticity in vivo. Owczarek, S., Kiryushko, D., Larsen, M. H., Kastrup, J. S., Gajhede, M., Sandi, C., Berezin, V., Bock, E., Soroka, V. Neuroplastin-55 binds to and signals through the fibroblast growth factor receptor.
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Affiliation(s)
- Sylwia Owczarek
- Protein Laboratory, Department of Neuroscience and Pharmacology, Panum Institute, University of Copenhagen, Blegdamsvej 3C, Bldg. 24.2, 2200 Copenhagen, Denmark.
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Li S, Christensen C, Køhler LB, Kiselyov VV, Berezin V, Bock E. Agonists of fibroblast growth factor receptor induce neurite outgrowth and survival of cerebellar granule neurons. Dev Neurobiol 2009; 69:837-54. [DOI: 10.1002/dneu.20740] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kirschbaum K, Kriebel M, Kranz EU, Pötz O, Volkmer H. Analysis of non-canonical fibroblast growth factor receptor 1 (FGFR1) interaction reveals regulatory and activating domains of neurofascin. J Biol Chem 2009; 284:28533-42. [PMID: 19666467 PMCID: PMC2781396 DOI: 10.1074/jbc.m109.004440] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2009] [Revised: 07/15/2009] [Indexed: 11/06/2022] Open
Abstract
Fibroblast growth factor receptors (FGFRs) are important for many different mechanisms, including cell migration, proliferation, differentiation, and survival. Here, we show a new link between FGFR1 and the cell adhesion molecule neurofascin, which is important for neurite outgrowth. After overexpression in HEK293 cells, embryonal neurofascin isoform NF166 was able to associate with FGFR1, whereas the adult isoform NF186, differing from NF166 in additional extracellular sequences, was deficient. Pharmacological inhibitors and overexpression of dominant negative components of the FGFR signaling pathway pointed to the activation of FGFR1 after association with neurofascin in neurite outgrowth assays in chick tectal neurons and rat PC12-E2 cells. Both extra- and intracellular domains of embryonal neurofascin isoform NF166 were able to form complexes with FGFR1 independently. However, the cytosolic domain was both necessary and sufficient for the activation of FGFR1. Cytosolic serine residues 56 and 100 were shown to be essential for the neurite outgrowth-promoting activity of neurofascin, whereas both amino acid residues were dispensable for FGFR1 association. In conclusion, the data suggest a neurofascin intracellular domain, which activates FGFR1 for neurite outgrowth, whereas the extracellular domain functions as an additional, regulatory FGFR1 interaction domain in the course of development.
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Affiliation(s)
| | | | | | - Oliver Pötz
- Biochemistry, Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Markwiesenstrasse 55, 72770 Reutlingen, Germany
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46
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Hu Y, Guimond SE, Travers P, Cadman S, Hohenester E, Turnbull JE, Kim SH, Bouloux PM. Novel mechanisms of fibroblast growth factor receptor 1 regulation by extracellular matrix protein anosmin-1. J Biol Chem 2009; 284:29905-20. [PMID: 19696444 DOI: 10.1074/jbc.m109.049155] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Activation of fibroblast growth factor (FGF) signaling is initiated by a multiprotein complex formation between FGF, FGF receptor (FGFR), and heparan sulfate proteoglycan on the cell membrane. Cross-talk with other factors could affect this complex assembly and modulate the biological response of cells to FGF. We have previously demonstrated that anosmin-1, a glycosylated extracellular matrix protein, interacts with the FGFR1 signaling complex and enhances its activity in an IIIc isoform-specific and HS-dependent manner. The molecular mechanism of anosmin-1 action on FGFR1 signaling, however, remains unknown. Here, we show that anosmin-1 directly binds to FGFR1 with high affinity. This interaction involves domains in the N terminus of anosmin-1 (cysteine-rich region, whey acidic protein-like domain and the first fibronectin type III domain) and the D2-D3 extracellular domains of FGFR1. In contrast, anosmin-1 binds to FGFR2IIIc with much lower affinity and displays negligible binding to FGFR3IIIc. We also show that FGFR1-bound anosmin-1, although capable of binding to FGF2 alone, cannot bind to a FGF2.heparin complex, thus preventing FGFR1.FGF2.heparin complex formation. By contrast, heparin-bound anosmin-1 binds to pre-formed FGF2.FGFR1 complex, generating an anosmin-1.FGFR1.FGF2.heparin complex. Furthermore, a functional interaction between anosmin-1 and the FGFR1 signaling complex is demonstrated by immunofluorescence co-localization and Transwell migration assays where anosmin-1 was shown to induce opposing effects during chemotaxis of human neuronal cells. Our study provides molecular and cellular evidence for a modulatory action of anosmin-1 on FGFR1 signaling, whereby binding of anosmin-1 to FGFR1 and heparin can play a dual role in assembly and activity of the ternary FGFR1.FGF2.heparin complex.
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Affiliation(s)
- Youli Hu
- Centre for Neuroendocrinology, University College London Medical School, Royal Free Campus, London NW32PF.
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Synaptic plasticity-associated proteases and protease inhibitors in the brain linked to the processing of extracellular matrix and cell adhesion molecules. ACTA ACUST UNITED AC 2009; 4:223-34. [DOI: 10.1017/s1740925x09990172] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Research on the molecular and cellular basis of learning and memory has focused on the mechanisms that underlie the induction and expression of synaptic plasticity. There is increasing evidence that structural changes at the synapse are associated with synaptic plasticity and that extracellular matrix (ECM) components and cell adhesion molecules are associated with these changes. The functions of both groups of molecules can be regulated by proteolysis. In this article we review the roles of selected proteases and protease inhibitors in perisynaptic proteolysis of the ECM and synaptic adhesion proteins and the impact of proteolysis on synaptic modification and cognitive function.
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48
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Huang L, Cheng T, Xu P, Duan J, Fang T, Xia Q. Immunoglobulin superfamily is conserved but evolved rapidly and is active in the silkworm, Bombyx mori. INSECT MOLECULAR BIOLOGY 2009; 18:517-530. [PMID: 19604311 DOI: 10.1111/j.1365-2583.2009.00896.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Immunoglobulin superfamily (IgSF) proteins are known for their abilities to specifically recognize and adhere to cells. In this paper, we predicted the presence of 133 IgSF proteins in the silkworm (Bombyx mori) genome. Comparison with similar proteins in other model organisms (Caenorhabditis elegans, Drosophila melanogaster, Anopheles gambiae, Apis mellifera and Homo sapiens) indicated that IgSF proteins are conserved but have rapidly evolved from worms to human beings. However, these proteins are well conserved amongst insects. Silkworm microarray-based expression data showed tissue expression of 57 IgSF genes and microbe-induced differential expression of 37 genes. Based on the expression data, we can conclude that the silkworm IgSF is active.
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Affiliation(s)
- L Huang
- Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China.
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49
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Bryant MR, Marta CB, Kim FS, Bansal R. Phosphorylation and lipid raft association of fibroblast growth factor receptor-2 in oligodendrocytes. Glia 2009; 57:935-46. [PMID: 19053057 DOI: 10.1002/glia.20818] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Fibroblast growth factors (FGFs) and their receptors (FGFRs) initiate diverse cellular responses that contribute to the regulation of oligodendrocyte (OL) function. To understand the mechanisms by which FGFRs elicit these cellular responses, we investigated the phosphorylation of signal transduction proteins and the role of cholesterol-glycosphingolipid-enriched "lipid raft" microdomains in differentiated OLs. Surprisingly, we found that the most abundant tyrosine-phosphorylated protein in OLs was the 120-kd isoform of FGFR2 and that it was phosphorylated even in the absence of FGF2, suggesting a potential ligand-independent function for this receptor. Furthermore, FGFR2, but not FGFR1, was associated with lipid raft microdomains in OLs and myelin (but not in astrocytes). This provides the first evidence for the association of FGFR with TX-100-insoluble lipid raft fractions. FGFR2 phosphorylated the key downstream target, FRS2 in OLs. Raft disruption resulted in loss of phosphorylated FRS2 from lipid rafts, coupled with the loss of Akt but not of Mek or Erk phosphorylation. This suggests that FGFR2-FRS2 signaling in lipid rafts operates via the PI3-Kinase/Akt pathway rather than the Ras/Mek/Erk pathway, emphasizing the importance of microenvironments within the cell membrane. Also present in lipid rafts in OLs and myelin, but not in astrocytes, was a novel 52-kd isoform of FGFR2 that lacked the extracellular ligand-binding region. These results demonstrate that FGFR2 in OLs and myelin possess unique characteristics that are specific both to receptor type and to OLs and provide a novel mechanism to elicit distinct cellular responses that mediate both FGF-dependent and -independent functions.
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Affiliation(s)
- M R Bryant
- Department of Neuroscience, University of Connecticut Medical School, Farmington, Connecticut 06030-3401, USA
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50
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Polanska UM, Fernig DG, Kinnunen T. Extracellular interactome of the FGF receptor-ligand system: complexities and the relative simplicity of the worm. Dev Dyn 2009; 238:277-93. [PMID: 18985724 DOI: 10.1002/dvdy.21757] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Fibroblast growth factors (FGFs) and their receptors (FGFRs) regulate a multitude of biological functions in embryonic development and in adult. A major question is how does one family of growth factors and their receptors control such a variety of functions? Classically, specificity was thought to be imparted by alternative splicing of the FGFRs, resulting in isoforms that bind specifically to a subset of the FGFs, and by different saccharide sequences in the heparan sulfate proteoglycan (HSPG) co-receptor. A growing number of noncanonical co-receptors such as integrins and neural cell adhesion molecule (NCAM) are now recognized as imparting additional complexity to classic FGFR signaling. This review will discuss the noncanonical FGFR ligands and speculate on the possibility that they provide additional and alternative means to determining the functional specificity of FGFR signaling. We will also discuss how invertebrate models such as C. elegans may advance our understanding of noncanonical FGFR signaling.
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Affiliation(s)
- Urszula M Polanska
- School of Biological Sciences, University of Liverpool, Liverpool, United Kingdom
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