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Yin T, Wang G, Wang L, Mudgal P, Wang E, Pan CC, Alexander PB, Wu H, Cao C, Liang Y, Tan L, Huang D, Chong M, Chen R, Lim BJW, Xiang K, Xue W, Wan L, Hu H, Loh YH, Wang XF, Li QJ. Breaking NGF-TrkA immunosuppression in melanoma sensitizes immunotherapy for durable memory T cell protection. Nat Immunol 2024; 25:268-281. [PMID: 38195702 DOI: 10.1038/s41590-023-01723-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 11/29/2023] [Indexed: 01/11/2024]
Abstract
Melanoma cells, deriving from neuroectodermal melanocytes, may exploit the nervous system's immune privilege for growth. Here we show that nerve growth factor (NGF) has both melanoma cell intrinsic and extrinsic immunosuppressive functions. Autocrine NGF engages tropomyosin receptor kinase A (TrkA) on melanoma cells to desensitize interferon γ signaling, leading to T and natural killer cell exclusion. In effector T cells that upregulate surface TrkA expression upon T cell receptor activation, paracrine NGF dampens T cell receptor signaling and effector function. Inhibiting NGF, either through genetic modification or with the tropomyosin receptor kinase inhibitor larotrectinib, renders melanomas susceptible to immune checkpoint blockade therapy and fosters long-term immunity by activating memory T cells with low affinity. These results identify the NGF-TrkA axis as an important suppressor of anti-tumor immunity and suggest larotrectinib might be repurposed for immune sensitization. Moreover, by enlisting low-affinity T cells, anti-NGF reduces acquired resistance to immune checkpoint blockade and prevents melanoma recurrence.
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Affiliation(s)
- Tao Yin
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
- Department of Immunology, Duke University School of Medicine, Durham, NC, USA
| | - Guoping Wang
- Department of Immunology, Duke University School of Medicine, Durham, NC, USA
| | - Liuyang Wang
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC, USA
| | | | - Ergang Wang
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
| | - Christopher C Pan
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
| | | | | | | | - Yaosi Liang
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
| | - Lianmei Tan
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
| | - De Huang
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
| | - Mengyang Chong
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
| | - Rui Chen
- Hervor Therapeutics, Hangzhou, China
| | - Bryan Jian Wei Lim
- Department of Immunology, Duke University School of Medicine, Durham, NC, USA
| | - Kun Xiang
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA
| | - Wei Xue
- Shanghai Institute of Nutrition and Health, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai, China
| | - Lixin Wan
- Department of Molecular Oncology and Cutaneous Oncology, H. Lee Moffitt Cancer Center and Research Institute, Tampa, FL, USA
| | - Hailan Hu
- Zhejiang University School of Brain Science and Brain Medicine, Hangzhou, China
| | - Yuin-Han Loh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Xiao-Fan Wang
- Department of Pharmacology and Cancer Biology, Duke University School of Medicine, Durham, NC, USA.
| | - Qi-Jing Li
- Department of Immunology, Duke University School of Medicine, Durham, NC, USA.
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.
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2
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Subirada PV, Tovo A, Vaglienti MV, Luna Pinto JD, Saragovi HU, Sánchez MC, Anastasía A, Barcelona PF. Etiological Roles of p75 NTR in a Mouse Model of Wet Age-Related Macular Degeneration. Cells 2023; 12:cells12020297. [PMID: 36672232 PMCID: PMC9856885 DOI: 10.3390/cells12020297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 01/04/2023] [Accepted: 01/06/2023] [Indexed: 01/13/2023] Open
Abstract
Choroidal neovascularization (CNV) is a pathological angiogenesis of the choroidal plexus of the retina and is a key feature in the wet form of age-related macular degeneration. Mononuclear phagocytic cells (MPCs) are known to accumulate in the subretinal space, generating a chronic inflammatory state that promotes the growth of the choroidal neovasculature. However, how the MPCs are recruited and activated to promote CNV pathology is not fully understood. Using genetic and pharmacological tools in a mouse model of laser-induced CNV, we demonstrate a role for the p75 neurotrophin receptor (p75NTR) in the recruitment of MPCs, in glial activation, and in vascular alterations. After laser injury, expression of p75NTR is increased in activated Muller glial cells near the CNV area in the retina and the retinal pigmented epithelium (RPE)-choroid. In p75NTR knockout mice (p75NTR KO) with CNV, there is significantly reduced recruitment of MPCs, reduced glial activation, reduced CNV area, and the retinal function is preserved, as compared to wild type mice with CNV. Notably, a single intravitreal injection of a pharmacological p75NTR antagonist in wild type mice with CNV phenocopied the results of the p75NTR KO mice. Our results demonstrate that p75NTR is etiological in the development of CNV.
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Affiliation(s)
| | - Albana Tovo
- Departamento de Bioquímica Clínica, Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET), Universidad Nacional de Córdoba, Córdoba 5016, Argentina
| | - María Victoria Vaglienti
- Departamento de Bioquímica Clínica, Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET), Universidad Nacional de Córdoba, Córdoba 5016, Argentina
| | | | - Horacio Uri Saragovi
- Lady Davis Research Institute-Jewish General Hospital, Center for Experimental Therapeutics, Department of Pharmacology and Therapeutics, Department of Ophthalmology and Vision Sciences, McGill University, Montreal, QC H3T 1E2, Canada
| | - Maria Cecilia Sánchez
- Departamento de Bioquímica Clínica, Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET), Universidad Nacional de Córdoba, Córdoba 5016, Argentina
| | - Agustín Anastasía
- Instituto Ferreyra, INIMEC-CONICET-Universidad Nacional de Córdoba, Córdoba 5016, Argentina
- Instituto Universitario de Ciencias Biomédicas de Córdoba (IUCBC), Córdoba 5016, Argentina
- Correspondence: (A.A.); (P.F.B.)
| | - Pablo Federico Barcelona
- Departamento de Bioquímica Clínica, Centro de Investigaciones en Bioquímica Clínica e Inmunología (CIBICI-CONICET), Universidad Nacional de Córdoba, Córdoba 5016, Argentina
- Correspondence: (A.A.); (P.F.B.)
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Morano NC, Smith RS, Danelon V, Schreiner R, Patel U, Herrera NG, Smith C, Olson SM, Laerke MK, Celikgil A, Garforth SJ, Garrett-Thomson SC, Lee FS, Hempstead BL, Almo SC. Human immunomodulatory ligand B7-1 mediates synaptic remodeling via the p75 neurotrophin receptor. J Clin Invest 2022; 132:e157002. [PMID: 36107635 PMCID: PMC9663165 DOI: 10.1172/jci157002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 09/13/2022] [Indexed: 12/30/2023] Open
Abstract
Cell surface receptors, ligands, and adhesion molecules underlie development, circuit formation, and synaptic function of the central nervous system and represent important therapeutic targets for many neuropathologies. The functional contributions of interactions between cell surface proteins of neurons and nonneuronal cells have not been fully addressed. Using an unbiased protein-protein interaction screen, we showed that the human immunomodulatory ligand B7-1 (hB7-1) interacts with the p75 neurotrophin receptor (p75NTR) and that the B7-1:p75NTR interaction is a recent evolutionary adaptation present in humans and other primates, but absent in mice, rats, and other lower mammals. The surface of hB7-1 that engages p75NTR overlaps with the hB7-1 surface involved in CTLA-4/CD28 recognition, and these molecules directly compete for binding to p75NTR. Soluble or membrane-bound hB7-1 altered dendritic morphology of cultured hippocampal neurons, with loss of the postsynaptic protein PSD95 in a p75NTR-dependent manner. Abatacept, an FDA-approved therapeutic (CTLA-4-hFc fusion) inhibited these processes. In vivo injection of hB7-1 into the murine subiculum, a hippocampal region affected in Alzheimer's disease, resulted in p75NTR-dependent pruning of dendritic spines. Here, we report the biochemical interaction between B7-1 and p75NTR, describe biological effects on neuronal morphology, and identify a therapeutic opportunity for treatment of neuroinflammatory diseases.
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Affiliation(s)
- Nicholas C. Morano
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA
- Zuckerman Mind Brain Behavior Institute, Columbia University, New York, New York, USA
| | - Roshelle S. Smith
- Department of Medicine, Weill Cornell Graduate School of Medical Sciences, New York, New York, USA
| | - Victor Danelon
- Department of Medicine, Weill Cornell Graduate School of Medical Sciences, New York, New York, USA
| | - Ryan Schreiner
- Division of Regenerative Medicine, Hartman Institute for Therapeutic Organ Regeneration, Ansary Stem Cell Institute, Department of Medicine, Weill Cornell Medicine, New York, New York, USA
| | - Uttsav Patel
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA
| | - Natalia G. Herrera
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA
| | - Carla Smith
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA
| | - Steven M. Olson
- Department of Computer Science, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Michelle K. Laerke
- Department of Medicine, Weill Cornell Graduate School of Medical Sciences, New York, New York, USA
| | - Alev Celikgil
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA
| | - Scott J. Garforth
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA
| | | | - Francis S. Lee
- Department of Psychiatry, Weill Cornell Medicine, New York, New York, USA
| | - Barbara L. Hempstead
- Department of Medicine, Weill Cornell Graduate School of Medical Sciences, New York, New York, USA
| | - Steven C. Almo
- Department of Biochemistry, Albert Einstein College of Medicine, New York, New York, USA
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Liu Z, Suh JS, Deng P, Bezouglaia O, Do M, Mirnia M, Cui ZK, Lee M, Aghaloo T, Wang CY, Hong C. Epigenetic Regulation of NGF-Mediated Osteogenic Differentiation in Human Dental Mesenchymal Stem Cells. Stem Cells 2022; 40:818-830. [PMID: 35728620 PMCID: PMC9512103 DOI: 10.1093/stmcls/sxac042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 06/02/2022] [Indexed: 11/13/2022]
Abstract
Nerve growth factor (NGF) is the best-characterized neurotrophin and is primarily recognized for its key role in the embryonic development of the nervous system and neuronal cell survival/differentiation. Recently, unexpected actions of NGF in bone regeneration have emerged as NGF is able to enhance the osteogenic differentiation of mesenchymal stem cells. However, little is known regarding how NGF signaling regulates osteogenic differentiation through epigenetic mechanisms. In this study, using human dental mesenchymal stem cells (DMSCs), we demonstrated that NGF mediates osteogenic differentiation through p75NTR, a low-affinity NGF receptor. P75NTR-mediated NGF signaling activates the JNK cascade and the expression of KDM4B, an activating histone demethylase, by removing repressive H3K9me3 epigenetic marks. Mechanistically, NGF-activated c-Jun binds to the KDM4B promoter region and directly upregulates KDM4B expression. Subsequently, KDM4B directly and epigenetically activates DLX5, a master osteogenic gene, by demethylating H3K9me3 marks. Furthermore, we revealed that KDM4B and c-Jun from the JNK signaling pathway work in concert to regulate NGF-mediated osteogenic differentiation through simultaneous recruitment to the promoter region of DLX5. We identified KDM4B as a key epigenetic regulator during the NGF-mediated osteogenesis both in vitro and in vivo using the calvarial defect regeneration mouse model. In conclusion, our study thoroughly elucidated the molecular and epigenetic mechanisms during NGF-mediated osteogenesis.
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Affiliation(s)
- Zhenqing Liu
- Division of Oral Biology and Medicine, School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Jin Sook Suh
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco (UCSF), San Francisco, CA, USA
| | - Peng Deng
- Division of Oral Biology and Medicine, School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Olga Bezouglaia
- Division of Diagnostic and Surgical Sciences, School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Megan Do
- School of Dentistry, University of California, San Francisco (UCSF), San Francisco, CA, USA
| | - Mojan Mirnia
- School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Zhong-Kai Cui
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Min Lee
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
- Department of Bioengineering, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Tara Aghaloo
- Division of Diagnostic and Surgical Sciences, School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Cun-Yu Wang
- Division of Oral Biology and Medicine, School of Dentistry, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
- Department of Bioengineering, University of California, Los Angeles (UCLA), Los Angeles, CA, USA
| | - Christine Hong
- Department of Orofacial Sciences, School of Dentistry, University of California, San Francisco (UCSF), San Francisco, CA, USA
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Marsland M, Dowdell A, Jiang CC, Wilmott JS, Scolyer RA, Zhang XD, Hondermarck H, Faulkner S. Expression of NGF/proNGF and Their Receptors TrkA, p75 NTR and Sortilin in Melanoma. Int J Mol Sci 2022; 23:ijms23084260. [PMID: 35457078 PMCID: PMC9032112 DOI: 10.3390/ijms23084260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 12/04/2022] Open
Abstract
There is increasing evidence that nerve growth factor (NGF) and its receptors, the neurotrophic receptor tyrosine kinase 1 (NTRK1/TrkA), the common neurotrophin receptor (NGFR/p75NTR) and the membrane receptor sortilin, participate in cancer growth. In melanoma, there have been some reports suggesting that NGF, TrkA and p75NTR are dysregulated, but the expression of the NGF precursor (proNGF) and its membrane receptor sortilin is unknown. In this study, we investigated the expression of NGF, proNGF, TrkA, p75NTR and sortilin by immunohistochemistry in a series of human tissue samples (n = 100), including non-cancerous nevi (n = 20), primary melanomas (n = 40), lymph node metastases (n = 20) and distant metastases (n = 20). Immunostaining was digitally quantified and revealed NGF and proNGF were expressed in all nevi and primary melanomas, and that the level of expression decreased from primary tumors to melanoma metastases (p = 0.0179 and p < 0.0001, respectively). Interestingly, TrkA protein expression was high in nevi and thin primary tumors but was strongly downregulated in thick primary tumors (p < 0.0001) and metastases (p < 0.0001). While p75NTR and sortilin were both expressed in most nevi and melanomas, there was no significant difference in expression between them. Together, these results pointed to a downregulation of NGF/ProNGF and TrkA in melanoma, and thus did not provide evidence to support the use of anti-proNGF/NGF or anti-TrkA therapies in advanced and metastatic forms of melanoma.
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Affiliation(s)
- Mark Marsland
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW 2308, Australia; (M.M.); (A.D.); (X.D.Z.); (S.F.)
- Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, NSW 2305, Australia;
| | - Amiee Dowdell
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW 2308, Australia; (M.M.); (A.D.); (X.D.Z.); (S.F.)
- Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, NSW 2305, Australia;
| | - Chen Chen Jiang
- Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, NSW 2305, Australia;
- School of Medicine and Public Health, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW 2308, Australia
| | - James S. Wilmott
- Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital and NSW Health Pathology, Sydney, NSW 2050, Australia; (J.S.W.); (R.A.S.)
- Melanoma Institute Australia, The University of Sydney, Sydney, NSW 2065, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia
| | - Richard A. Scolyer
- Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital and NSW Health Pathology, Sydney, NSW 2050, Australia; (J.S.W.); (R.A.S.)
- Melanoma Institute Australia, The University of Sydney, Sydney, NSW 2065, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia
- Charles Perkins Centre, The University of Sydney, Sydney, NSW 2006, Australia
| | - Xu Dong Zhang
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW 2308, Australia; (M.M.); (A.D.); (X.D.Z.); (S.F.)
- Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, NSW 2305, Australia;
| | - Hubert Hondermarck
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW 2308, Australia; (M.M.); (A.D.); (X.D.Z.); (S.F.)
- Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, NSW 2305, Australia;
- Correspondence: ; Tel.: +61-2492-18830
| | - Sam Faulkner
- School of Biomedical Sciences and Pharmacy, College of Health, Medicine and Wellbeing, University of Newcastle, Callaghan, NSW 2308, Australia; (M.M.); (A.D.); (X.D.Z.); (S.F.)
- Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, NSW 2305, Australia;
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Paoletti F, Lamba D. Small Endogenous Ligands Modulation of Nerve Growth Factor Bioactivity: A Structural Biology Overview. Cells 2021; 10:cells10123462. [PMID: 34943971 PMCID: PMC8700322 DOI: 10.3390/cells10123462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/01/2021] [Accepted: 12/03/2021] [Indexed: 01/12/2023] Open
Abstract
Experiments with cell cultures and animal models have provided solid support for the assumption that Nerve Growth Factor (NGF) plays a key role in the regulation of neuronal cell survival and death. Recently, endogenous ligands have been proposed as physiological modulators of NGF biological activity as part of this regulatory cascade. However, the structural and mechanistic determinants for NGF bioactivity remain to be elucidated. We recently unveiled, by an integrated structural biology approach, the ATP binding sites of NGF and investigated the effects on TrkA and p75NTR receptors binding. These results pinpoint ATP as a genuine endogenous modulator of NGF signaling, paving the way to the characterization of not-yet-identified chemical diverse endogenous biological active small molecules as novel modulators of NGF. The present review aims at providing an overview of the currently available 3D structures of NGF in complex with different small endogenous ligands, featuring the molecular footprints of the small molecules binding. This knowledge is essential for further understanding the functional role of small endogenous ligands in the modulation of neurotrophins signaling in physiological and pathological conditions and for better exploiting the therapeutic potentialities of NGF.
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Affiliation(s)
- Francesca Paoletti
- Laboratory for Molecular Structural Dynamics, Theory Department, National Institute of Chemistry, SI-1001 Ljubljana, Slovenia
- Correspondence:
| | - Doriano Lamba
- Institute of Crystallography—C.N.R.—Trieste Outstation, Area Science Park—Basovizza, I-34149 Trieste, Italy;
- Interuniversity Consortium “Biostructures and Biosystems National Institute”, I-00136 Roma, Italy
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Huang F, Gonçalves C, Bartish M, Rémy-Sarrazin J, Issa ME, Cordeiro B, Guo Q, Emond A, Attias M, Yang W, Plourde D, Su J, Gimeno MG, Zhan Y, Galán A, Rzymski T, Mazan M, Masiejczyk M, Faber J, Khoury E, Benoit A, Gagnon N, Dankort D, Journe F, Ghanem GE, Krawczyk CM, Saragovi HU, Piccirillo CA, Sonenberg N, Topisirovic I, Rudd CE, Miller WH, del Rincón SV. Inhibiting the MNK1/2-eIF4E axis impairs melanoma phenotype switching and potentiates antitumor immune responses. J Clin Invest 2021; 131:140752. [PMID: 33690225 PMCID: PMC8262472 DOI: 10.1172/jci140752] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 03/03/2021] [Indexed: 12/19/2022] Open
Abstract
Melanomas commonly undergo a phenotype switch, from a proliferative to an invasive state. Such tumor cell plasticity contributes to immunotherapy resistance; however, the mechanisms are not completely understood and thus are therapeutically unexploited. Using melanoma mouse models, we demonstrated that blocking the MNK1/2-eIF4E axis inhibited melanoma phenotype switching and sensitized melanoma to anti-PD-1 immunotherapy. We showed that phospho-eIF4E-deficient murine melanomas expressed high levels of melanocytic antigens, with similar results verified in patient melanomas. Mechanistically, we identified phospho-eIF4E-mediated translational control of NGFR, a critical effector of phenotype switching. Genetic ablation of phospho-eIF4E reprogrammed the immunosuppressive microenvironment, exemplified by lowered production of inflammatory factors, decreased PD-L1 expression on dendritic cells and myeloid-derived suppressor cells, and increased CD8+ T cell infiltrates. Finally, dual blockade of the MNK1/2-eIF4E axis and the PD-1/PD-L1 immune checkpoint demonstrated efficacy in multiple melanoma models regardless of their genomic classification. An increase in the presence of intratumoral stem-like TCF1+PD-1+CD8+ T cells, a characteristic essential for durable antitumor immunity, was detected in mice given a MNK1/2 inhibitor and anti-PD-1 therapy. Using MNK1/2 inhibitors to repress phospho-eIF4E thus offers a strategy to inhibit melanoma plasticity and improve response to anti-PD-1 immunotherapy.
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Affiliation(s)
- Fan Huang
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | | | - Margarita Bartish
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | | | - Mark E. Issa
- Maisonneuve-Rosemont Hospital Research Centre, Montréal, Quebec, Canada
| | | | - Qianyu Guo
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Audrey Emond
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - Mikhael Attias
- Department of Microbiology and Immunology and
- Research Institute of the McGill University Health Centre, McGill University, Montréal, Quebec, Canada
| | - William Yang
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Dany Plourde
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - Jie Su
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - Marina Godoy Gimeno
- University Veterinary Teaching Hospital Camden, Faculty of Science, University of Sydney, Sydney, New South Wales, Australia
| | - Yao Zhan
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Alba Galán
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | | | | | | | | | - Elie Khoury
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Alexandre Benoit
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
| | - Natascha Gagnon
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
| | - David Dankort
- Department of Biology and
- Goodman Cancer Research Center, McGill University, Montréal, Quebec, Canada
| | - Fabrice Journe
- Laboratory of Oncology and Experimental Surgery, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | - Ghanem E. Ghanem
- Laboratory of Oncology and Experimental Surgery, Institut Jules Bordet, Université Libre de Bruxelles, Brussels, Belgium
| | | | - H. Uri Saragovi
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Department of Pharmacology and Therapeutics
| | - Ciriaco A. Piccirillo
- Department of Microbiology and Immunology and
- Research Institute of the McGill University Health Centre, McGill University, Montréal, Quebec, Canada
| | - Nahum Sonenberg
- Goodman Cancer Research Center, McGill University, Montréal, Quebec, Canada
- Department of Biochemistry, and
| | - Ivan Topisirovic
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
| | - Christopher E. Rudd
- Maisonneuve-Rosemont Hospital Research Centre, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
| | - Wilson H. Miller
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
| | - Sonia V. del Rincón
- Lady Davis Institute, Jewish General Hospital, Montréal, Quebec, Canada
- Division of Experimental Medicine, McGill University, Montréal, Quebec, Canada
- McGill Centre for Translational Research in Cancer, McGill University, Montréal, Quebec, Canada
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Proietti D, Giordani L, De Bardi M, D’Ercole C, Lozanoska-Ochser B, Amadio S, Volonté C, Marinelli S, Muchir A, Bouché M, Borsellino G, Sacco A, Puri PL, Madaro L. Activation of skeletal muscle-resident glial cells upon nerve injury. JCI Insight 2021; 6:143469. [PMID: 33661767 PMCID: PMC8119188 DOI: 10.1172/jci.insight.143469] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 02/25/2021] [Indexed: 01/06/2023] Open
Abstract
Here, we report on the identification of Itga7-expressing muscle-resident glial cells activated by loss of neuromuscular junction (NMJ) integrity. Gene expression analysis at the bulk and single-cell level revealed that these cells are distinct from Itga7-expressing muscle satellite cells. We show that a selective activation and expansion of Itga7+ glial cells occur in response to muscle nerve lesion. Upon activation, muscle glial-derived progenies expressed neurotrophic genes, including nerve growth factor receptor, which enables their isolation by FACS. We show that activated muscle glial cells also expressed genes potentially implicated in extracellular matrix remodeling at NMJs. We found that tenascin C, which was highly expressed by muscle glial cells, activated upon nerve injury and preferentially localized to NMJ. Interestingly, we observed that the activation of muscle glial cells by acute nerve injury was reversible upon NMJ repair. By contrast, in a mouse model of ALS, in which NMJ degeneration is progressive, muscle glial cells steadily increased over the course of the disease. However, they exhibited an impaired neurotrophic activity, suggesting that pathogenic activation of glial cells may be implicated in ALS progression.
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Affiliation(s)
- Daisy Proietti
- IRCCS Fondazione Santa Lucia, Rome, Italy
- Department of Anatomy, Histology, Forensic Medicine and Orthopedics, University of Rome “la Sapienza”, Rome, Italy
| | - Lorenzo Giordani
- Sorbonne Université, INSERM UMRS 974, Association Institut de Myologie, Centre de Recherche en Myologie, Paris, France
| | | | - Chiara D’Ercole
- Department of Anatomy, Histology, Forensic Medicine and Orthopedics, University of Rome “la Sapienza”, Rome, Italy
| | - Biliana Lozanoska-Ochser
- Department of Anatomy, Histology, Forensic Medicine and Orthopedics, University of Rome “la Sapienza”, Rome, Italy
| | | | - Cinzia Volonté
- IRCCS Fondazione Santa Lucia, Rome, Italy
- CNR, National Research Council, Institute for Systems Analysis and Computer Science, Rome, Italy
| | - Sara Marinelli
- CNR, National Research Council, Institute of Biochemistry and Cell Biology, Monterotondo Scalo, Rome, Italy
| | - Antoine Muchir
- Sorbonne Université, INSERM UMRS 974, Association Institut de Myologie, Centre de Recherche en Myologie, Paris, France
| | - Marina Bouché
- Department of Anatomy, Histology, Forensic Medicine and Orthopedics, University of Rome “la Sapienza”, Rome, Italy
| | | | - Alessandra Sacco
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Pier Lorenzo Puri
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Luca Madaro
- IRCCS Fondazione Santa Lucia, Rome, Italy
- Department of Anatomy, Histology, Forensic Medicine and Orthopedics, University of Rome “la Sapienza”, Rome, Italy
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9
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Xie Y, Seawell J, Boesch E, Allen L, Suchy A, Longo FM, Meeker RB. Small molecule modulation of the p75 neurotrophin receptor suppresses age- and genotype-associated neurodegeneration in HIV gp120 transgenic mice. Exp Neurol 2020; 335:113489. [PMID: 33007293 DOI: 10.1016/j.expneurol.2020.113489] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 09/07/2020] [Accepted: 09/28/2020] [Indexed: 12/21/2022]
Abstract
The persistence of HIV in the central nervous system leads to cognitive deficits in up to 50% of people living with HIV even with systemic suppression by antiretroviral treatment. The interaction of chronic inflammation with age-associated degeneration places these individuals at increased risk of accelerated aging and other neurodegenerative diseases and no treatments are available that effectively halt these processes. The adverse effects of aging and inflammation may be mediated, in part, by an increase in the expression of the p75 neurotrophin receptor (p75NTR) which shifts the balance of neurotrophin signaling toward less protective pathways. To determine if modulation of p75NTR could modify the disease process, we treated HIV gp120 transgenic mice with a small molecule ligand designed to engage p75NTR and downregulate degenerative signaling. Daily treatment with 50 mg/kg LM11A-31 for 4 months suppressed age- and genotype-dependent activation of microglia, increased microtubule associated protein-2 (MAP-2), reduced dendritic varicosities and slowed the loss of parvalbumin immunoreactive neurons in the hippocampus. An age related accumulation of microtubule associated protein Tau was identified in the hippocampus in extracellular clusters that co-expressed p75NTR suggesting a link between Tau and p75NTR. Although the significance of the relationship between p75NTR and Tau is unclear, a decrease in Tau-1 immunoreactivity as gp120 mice entered old age (>16 months) suggests that the Tau may transition to more pathological modifications; a process blocked by LM11A-31. Overall, the effects of LM11A-31 are consistent with strong neuroprotective and anti-inflammatory actions that have significant therapeutic potential.
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Affiliation(s)
- Youmie Xie
- Department of Neurology, University of North Carolina, Chapel Hill, NC 27599, United States of America
| | - Jaimie Seawell
- Department of Neurology, University of North Carolina, Chapel Hill, NC 27599, United States of America; The Edward Via College of Osteopathic Medicine, Spartanburg, SC 29303, United States of America
| | - Emily Boesch
- School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, United States of America
| | - Lauren Allen
- Department of Neurology, University of North Carolina, Chapel Hill, NC 27599, United States of America
| | - Ashley Suchy
- Department of Neurology, University of North Carolina, Chapel Hill, NC 27599, United States of America
| | - Frank M Longo
- Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, CA 94305, United States of America
| | - Rick B Meeker
- Department of Neurology, University of North Carolina, Chapel Hill, NC 27599, United States of America; Neurobiology Curriculum, University of North Carolina, Chapel Hill, NC 27599, United States of America.
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10
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Castellini C, Mattioli S, Bosco AD, Cotozzolo E, Cartoni Mancinelli A, Rende M, Stabile AM, Pistilli A. Nerve growth factor receptor role on rabbit sperm storage. Theriogenology 2020; 153:54-61. [PMID: 32442740 DOI: 10.1016/j.theriogenology.2020.04.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 04/30/2020] [Accepted: 04/30/2020] [Indexed: 12/27/2022]
Abstract
The influence of NGF in male reproduction in some animal species and humans has already been assessed. Many of these effects are mediated by the distribution and abundance of tropomyosin receptor kinase A (TrKA) and p75 neurotrophin (p75NTR) receptors on sperm cells. The aim of this research was to investigate the role of NGF and its receptors, TrKA and p75NTR, in rabbit sperm outcomes during in vitro storage. Major semen traits (kinetic parameters, apoptotic, necrotic and live sperm) were recorded in rabbit semen samples from 0 to 12 h of storage (every 4 h). Three experimental hypotheses were formulated: i) sperm storage changes NGF receptor abundance in rabbit sperm; ii) TrKA and p75NTR differently modulate NGF signalling (assessed by the neutralisation of receptors); iii) NGF-receptor interactions show different responses during storage (evaluated by the addition of exogenous NGF). The results demonstrate that: (i) the receptor number changed in a time-dependent manner with a significant increase in p75NTR after 8-12 h of storage; ii) the neutralisation of NGF receptors largely affected VCL, apoptotic, necrotic and live cells during sperm storage, i.e. blockade of TrKA significantly increased speed, capacitation, necrosis and apoptosis, whereas blockade of p75NTR improved motility and live cells; iii) the addition of exogenous human NGF (100 ng/mL) at different time points of storage (0, 4, 8 h) differently influenced sperm traits i.e. NGF addition at time 0 positively affected all the pro-vital traits (kinetic, live cells) whereas, after 4-8 h, the effect of NGF was null or negative. In conclusion, NGF affects kinetic and other physiological traits (capacitation, apoptosis and necrosis) of rabbit sperm in a time-dependent manner. Most of these modifications are modulated by the receptors involved (TrKA or p75NTR), which changed considerably during sperm storage (increase of p75NTR).
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Affiliation(s)
- Cesare Castellini
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06100, Perugia, Italy
| | - Simona Mattioli
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06100, Perugia, Italy.
| | - Alessandro Dal Bosco
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06100, Perugia, Italy
| | - Elisa Cotozzolo
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06100, Perugia, Italy
| | - Alice Cartoni Mancinelli
- Department of Agricultural, Environmental and Food Science, University of Perugia, Borgo XX Giugno 74, 06100, Perugia, Italy
| | - Mario Rende
- Section of Human, Clinical and Forensic Anatomy, Department of Surgery and Biomedical Sciences, School of Medicine, University of Perugia, P.le Lucio Severi, 1, Sant'Andrea delle Fratte, 06132, Perugia, Italy
| | - Anna Maria Stabile
- Section of Human, Clinical and Forensic Anatomy, Department of Surgery and Biomedical Sciences, School of Medicine, University of Perugia, P.le Lucio Severi, 1, Sant'Andrea delle Fratte, 06132, Perugia, Italy
| | - Alessandra Pistilli
- Section of Human, Clinical and Forensic Anatomy, Department of Surgery and Biomedical Sciences, School of Medicine, University of Perugia, P.le Lucio Severi, 1, Sant'Andrea delle Fratte, 06132, Perugia, Italy
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11
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Zhao X, Du F, Liu X, Ruan Q, Wu Z, Lei C, Deng Y, Luo C, Jiang J, Shi D, Lu F. Brain-derived neurotrophic factor (BDNF) is expressed in buffalo (Bubalus bubalis) ovarian follicles and promotes oocyte maturation and early embryonic development. Theriogenology 2019; 130:79-88. [PMID: 30877846 DOI: 10.1016/j.theriogenology.2019.02.020] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/28/2019] [Accepted: 02/21/2019] [Indexed: 11/18/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) has been discovered and characterized for several decades, yet its expression pattern in non-neuronal tissues like ovary and potential mechanism during oocyte maturation are still poorly understood. Thus the present study was devised to determine the expression pattern and mechanism of BDNF during buffalo oocyte maturation. The results revealed that BDNF was presented at different stages of buffalo ovarian follicles as well as during oocyte maturation and early embryo development. BDNF's receptor p75 was detected in granulosa cells, cumulus cells, oocytes, and early embryos, while another receptor neurotrophic tyrosine kinase receptor, type2 (NTRK2) was only identified in granulosa cells and cumulus cells. To determine the effect of BDNF on oocyte maturation and early embryo development, different concentrations (0, 1, 10, 100 ng/mL) of BDNF were added into the in vitro maturation media, respectively. It was divulged that 10 ng/mL BDNF promoted the in vitro maturation rate of buffalo oocytes and the blastocysts rate of embryos cultured in vitro (P < 0.05). Then through using NTRK2 inhibitor K-252a, we found BDNF and its receptor NTRK2 in cumulus cells played an essential role during oocyte maturation. Moreover, to further investigate the underlying mechanism by which BDNF enhances oocyte maturation, RT-qPCR was performed. 10 ng/mL BDNF treatment could decrease the expression level of apoptosis-related genes CCASP9, FAS, up-regulate the expression level of receptor gene NTRK2, cell proliferation-related genes CCNB1, PCNA, gap junction-related genes GJA4, GJA1 as well as cumulus cells expansion-related genes HAS2, PTX3 and TNFAIP6 (P < 0.05). Altogether, our results showed for the first time that BDNF was expressed throughout buffalo ovarian follicle development, oocyte maturation and early embryogenesis. Furthermore, BDNF treatment could improve the efficiency of buffalo oocyte maturation through regulating genes expression in cumulus cells and then promote early embryo development.
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Affiliation(s)
- Xin Zhao
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Fengjiao Du
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China; Reproductive Medicine Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, 510120, China
| | - Xiaolin Liu
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Qiuyan Ruan
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Zhulian Wu
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Chuan Lei
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Yanfei Deng
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Chan Luo
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Jianrong Jiang
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China
| | - Deshun Shi
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China.
| | - Fenghua Lu
- Animal Reproduction Institute, State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, 530005, China.
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12
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Tiernan CT, Ginsberg SD, He B, Ward SM, Guillozet-Bongaarts AL, Kanaan NM, Mufson EJ, Counts SE. Pretangle pathology within cholinergic nucleus basalis neurons coincides with neurotrophic and neurotransmitter receptor gene dysregulation during the progression of Alzheimer's disease. Neurobiol Dis 2018; 117:125-136. [PMID: 29859871 PMCID: PMC6278831 DOI: 10.1016/j.nbd.2018.05.021] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 05/30/2018] [Indexed: 01/22/2023] Open
Abstract
Cholinergic basal forebrain neurons of the nucleus basalis of Meynert (nbM) regulate attentional and memory function and are exquisitely prone to tau pathology and neurofibrillary tangle (NFT) formation during the progression of Alzheimer's disease (AD). nbM neurons require the neurotrophin nerve growth factor (NGF), its cognate receptor TrkA, and the pan-neurotrophin receptor p75NTR for their maintenance and survival. Additionally, nbM neuronal activity and cholinergic tone are regulated by the expression of nicotinic (nAChR) and muscarinic (mAChR) acetylcholine receptors as well as receptors modulating glutamatergic and catecholaminergic afferent signaling. To date, the molecular and cellular relationships between the evolution of tau pathology and nbM neuronal survival remain unknown. To address this knowledge gap, we profiled cholinotrophic pathway genes within nbM neurons immunostained for pS422, a pretangle phosphorylation event preceding tau C-terminal truncation at D421, or dual-labeled for pS422 and TauC3, a later stage tau neo-epitope revealed by this same C-terminal truncation event, via single-population custom microarray analysis. nbM neurons were obtained from postmortem tissues from subjects who died with an antemortem clinical diagnosis of no cognitive impairment (NCI), mild cognitive impairment (MCI), or mild/moderate AD. Quantitative analysis revealed significant downregulation of mRNAs encoding TrkA as well as TrkB, TrkC, and the Trk-mediated downstream pro-survival kinase Akt in pS422+ compared to unlabeled, pS422-negative nbM neurons. In addition, pS422+ neurons displayed a downregulation of transcripts encoding NMDA receptor subunit 2B, metabotropic glutamate receptor 2, D2 dopamine receptor, and β1 adrenoceptor. By contrast, transcripts encoding p75NTR were downregulated in dual-labeled pS422+/TauC3+ neurons. Appearance of the TauC3 epitope was also associated with an upregulation of the α7 nAChR subunit and differential downregulation of the β2 nAChR subunit. Notably, we found that gene expression patterns for each cell phenotype did not differ with clinical diagnosis. However, linear regression revealed that global cognition and Braak stage were predictors of select transcript changes within both unlabeled and pS422+/TauC3- neurons. Taken together, these cell phenotype-specific gene expression profiling data suggest that dysregulation of neurotrophic and neurotransmitter signaling is an early pathogenic mechanism associated with NFT formation in vulnerable nbM neurons and cognitive decline in AD, which may be amenable to therapeutic intervention early in the disease process.
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Affiliation(s)
- Chelsea T Tiernan
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Stephen D Ginsberg
- Center for Dementia Research, Nathan Kline Institute, Orangeburg, NY, USA; Department of Psychiatry, NYU Langone School of Medicine, New York, NY, USA; Department of Physiology & Neuroscience, NYU Langone School of Medicine, New York, NY, USA; NYU Neuroscience Institute, NYU Langone School of Medicine, New York, NY, USA
| | - Bin He
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ, USA
| | - Sarah M Ward
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | | | - Nicholas M Kanaan
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA; Hauenstein Neurosciences Center, Mercy Health Saint Mary's Hospital, Grand Rapids, MI, USA
| | - Elliott J Mufson
- Department of Neurobiology, Barrow Neurological Institute, Phoenix, AZ, USA
| | - Scott E Counts
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA; Hauenstein Neurosciences Center, Mercy Health Saint Mary's Hospital, Grand Rapids, MI, USA; Department of Family Medicine, Michigan State University, Grand Rapids, MI, USA; Michigan Alzheimer's Disease Core Center, Ann Arbor, MI, USA.
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13
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Antyborzec I, O'Leary VB, Dolly JO, Ovsepian SV. Low-Affinity Neurotrophin Receptor p75 Promotes the Transduction of Targeted Lentiviral Vectors to Cholinergic Neurons of Rat Basal Forebrain. Neurotherapeutics 2016; 13:859-870. [PMID: 27220617 PMCID: PMC5081123 DOI: 10.1007/s13311-016-0445-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Basal forebrain cholinergic neurons (BFCNs) are one of the most affected neuronal types in Alzheimer's disease (AD), with their extensive loss documented at late stages of the pathology. While discriminatory provision of neuroprotective agents and trophic factors to these cells is thought to be of substantial therapeutic potential, the intricate topography and structure of the forebrain cholinergic system imposes a major challenge. To overcome this, we took advantage of the physiological enrichment of BFCNs with a low-affinity p75 neurotrophin receptor (p75NTR) for their targeting by lentiviral vectors within the intact brain of adult rat. Herein, a method is described that affords selective and effective transduction of BFCNs with a green fluorescence protein (GFP) reporter, which combines streptavidin-biotin technology with anti-p75NTR antibody-coated lentiviral vectors. Specific GFP expression in cholinergic neurons was attained in the medial septum and nuclei of the diagonal band Broca after a single intraventricular administration of such targeted vectors. Bioelectrical activity of GFP-labeled neurons was proven to be unchanged. Thus, proof of principle is obtained for the utility of the low-affinity p75NTR for targeted transduction of vectors to BFCNs in vivo.
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Affiliation(s)
- Inga Antyborzec
- International Centre for Neurotherapeutics, Dublin City University, Dublin, Ireland
| | - Valerie B O'Leary
- International Centre for Neurotherapeutics, Dublin City University, Dublin, Ireland
- Institute of Radiation Biology, Helmholtz Zentrum Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - James O Dolly
- International Centre for Neurotherapeutics, Dublin City University, Dublin, Ireland
| | - Saak V Ovsepian
- International Centre for Neurotherapeutics, Dublin City University, Dublin, Ireland.
- Institute for Biological and Medical Imaging, Helmholtz Zentrum Munich, German Research Center for Environmental Health, Neuherberg, Germany.
- Munich School of Bioengineering, Technical University Munich, Munich, Germany.
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14
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Balzamino BO, Esposito G, Marino R, Keller F, Micera A. NGF Expression in Reelin-Deprived Retinal Cells: A Potential Neuroprotective Effect. Neuromolecular Med 2015; 17:314-25. [PMID: 26066836 DOI: 10.1007/s12017-015-8360-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Accepted: 05/30/2015] [Indexed: 11/25/2022]
Abstract
We recently reported that increased NGF and p75(NTR) as well as decreased trkA(NGFR) characterized the Reelin-deprived (E-Reeler) retina, prospecting a potential contribution of NGF during E-Reeler retinogenesis. Herein, retinal ganglion cells (RGCs), glial cells and rod bipolar cells (RBCs) were isolated from E-Reeler retinas, and NGF, trkA(NGFR)/p75(NTR) expression and apoptosis were investigated. E-Reeler (n = 28) and E-control (n = 34) retinas were digested, and RGCs, glial cells and RBCs were isolated by the magnetic bead separation. Expression of NGF, trkA(NGFR), p75(NTR), Annexin V/PI and Bcl2/Bax was quantified by flow cytometry and validated by real-time PCR or WB. In E-Reeler retinas, NGF was significantly increased in RGCs and glial cells, p75(NTR) was increased in both RBCs and RGCs, and trkA(NGFR) was unchanged. In E-control retinas, NGF and p75(NTR) were expressed mainly in RBCs and RGCs and faintly in glial cells, while trkA(NGFR) was weakly expressed by RBCs and RGCs. In RBCs and RGCs, Annexin V expression was unchanged, while Bcl2 increased and Bax decreased selectively in E-Reeler RGCs. The data indicate that E-Reeler RBCs and RGCs overexpress NGF and p75(NTR) as a protective endogenous response to Reelin deprivation. The observation is strongly supported by the absence of apoptosis in both cell types.
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Affiliation(s)
- Bijorn Omar Balzamino
- Laboratory of Ophthalmology, Ocular Surface Unit, IRCCS-G.B. Bietti Foundation, via Alvaro del Portillo 21, 00128, Rome, Italy
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15
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Akiyama Y, Mikami Y, Watanabe E, Watanabe N, Toriumi T, Takahashi T, Komiyama K, Isokawa K, Shimizu N, Honda MJ. The P75 neurotrophin receptor regulates proliferation of the human MG63 osteoblast cell line. Differentiation 2014; 87:111-8. [PMID: 24582280 DOI: 10.1016/j.diff.2014.01.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Accepted: 01/17/2014] [Indexed: 02/07/2023]
Abstract
The 75 kDa transmembrane protein, p75(NTR), is a marker of mesenchymal stem cells (MSCs). Isolated MSCs are capable of differentiating into osteoblasts, but the molecular function of p75(NTR) in MSCs and osteoblasts is poorly understood. The aim of this study was to examine the function of p75(NTR) in the human MG63 osteoblast cell line compared to the murine MC3T3E-1 pre-osteoblast cell line. MG63 cells and MC3T3-E1 cells expressing exogenous p75(NTR) protein (denoted as p75-MG63 and p75GFP-E1, respectively) were generated to compare osteogenic differentiation and cell proliferation abilities. Overexpression of p75(NTR) induced alkaline phosphatase activity and the mRNA expression of osteoblast-related genes such as osterix and bone sialoprotein in both p75-MG63 and p75GFP-E1. Interestingly, exogenous p75(NTR) stimulated cell proliferation and cell cycle progression in p75GFP-E1, but not in p75-MG63. To elucidate any different effects of p75(NTR) expression on osteogenic differentiation and cell proliferation, we examined the mRNA expression of tropomyosin receptor kinase (trk) genes (trkA, trkB, trkC) and Nogo receptor (NgR), which are binding partners of p75(NTR). Although trkA, trkB, and trkC were detected in both p75-MG63 and p75GFP-E1, only NgR was detected in p75-MG63. We then used the K252a inhibitor of the trks to identify the signaling pathway for osteogenic differentiation and cell proliferation. Inhibition of trks by K252a suppressed p75(NTR)-mediated osteogenic differentiation of p75GFP-E1, whereas deletion of the GDI domain in P75(NTR) from the p75-MG63 produced enhanced cell proliferation compared to p75-MG63. These results suggest that p75(NTR) signaling associated with trk receptors promotes both cell proliferation and osteoblast differentiation, but that p75(NTR)-mediated proliferation may be suppressed by signaling from the p75(NTR)/NgR complex.
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Affiliation(s)
- Yuko Akiyama
- Nihon University Graduate School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Yoshikazu Mikami
- Department of Pathology, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Eri Watanabe
- Laboratory of Diagnostic Medicine, The Institute of Medical Science, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Nobukazu Watanabe
- Laboratory of Diagnostic Medicine, The Institute of Medical Science, The University of Tokyo, 4-6-1, Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Taku Toriumi
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Tomihisa Takahashi
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Kazuo Komiyama
- Department of Pathology, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Keitaro Isokawa
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Noriyoshi Shimizu
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Orthodontics, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan
| | - Masaki J Honda
- Dental Research Center, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan; Department of Anatomy, Nihon University School of Dentistry, 1-8-13, Kanda-Surugadai, Chiyoda-ku, Tokyo 101-8310, Japan.
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16
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Mirkina I, Hadzijusufovic E, Krepler C, Mikula M, Mechtcheriakova D, Strommer S, Stella A, Jensen-Jarolim E, Höller C, Wacheck V, Pehamberger H, Valent P. Phenotyping of human melanoma cells reveals a unique composition of receptor targets and a subpopulation co-expressing ErbB4, EPO-R and NGF-R. PLoS One 2014; 9:e84417. [PMID: 24489649 PMCID: PMC3906015 DOI: 10.1371/journal.pone.0084417] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Accepted: 11/18/2013] [Indexed: 11/18/2022] Open
Abstract
Malignant melanoma is a life-threatening skin cancer increasingly diagnosed in the western world. In advanced disease the prognosis is grave. Growth and metastasis formation in melanomas are regulated by a network of cytokines, cytokine-receptors, and adhesion molecules. However, little is known about surface antigens and target expression profiles in human melanomas. We examined the cell surface antigen profile of human skin melanoma cells by multicolor flow cytometry, and compared their phenotype with 4 melanoma cell lines (A375, 607B, Mel-Juso, SK-Mel28). Melanoma cells were defined as CD45-/CD31- cells co-expressing one or more melanoma-related antigens (CD63, CD146, CD166). In most patients, melanoma cells exhibited ErbB3/Her3, CD44/Pgp-1, ICAM-1/CD54 and IGF-1-R/CD221, but did not express CD20, ErbB2/Her2, KIT/CD117, AC133/CD133 or MDR-1/CD243. Melanoma cell lines were found to display a similar phenotype. In most patients, a distinct subpopulation of melanoma cells (4-40%) expressed the erythropoietin receptor (EPO-R) and ErbB4 together with PD-1 and NGF-R/CD271. Both the EPO-R+ and EPO-R- subpopulations produced melanoma lesions in NOD/SCID IL-2Rgamma(null) (NSG) mice in first and secondary recipients. Normal skin melanocytes did not express ErbB4 or EPO-R, but expressed a functional KIT receptor (CD117) as well as NGF-R, ErbB3/Her3, IGF-1-R and CD44. In conclusion, melanoma cells display a unique composition of surface target antigens and cytokine receptors. Malignant transformation of melanomas is accompanied by loss of KIT and acquisition of EPO-R and ErbB4, both of which are co-expressed with NGF-R and PD-1 in distinct subfractions of melanoma cells. However, expression of EPO-R/ErbB4/PD-1 is not indicative of a selective melanoma-initiating potential.
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MESH Headings
- Animals
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Cell Line, Tumor
- ErbB Receptors/genetics
- ErbB Receptors/metabolism
- Female
- Flow Cytometry
- Gene Expression Regulation, Neoplastic
- Humans
- Immunophenotyping
- Male
- Melanoma/genetics
- Melanoma/metabolism
- Melanoma/pathology
- Mice
- Mice, Inbred NOD
- Neoplasm Transplantation
- Programmed Cell Death 1 Receptor/genetics
- Programmed Cell Death 1 Receptor/metabolism
- Proto-Oncogene Proteins c-kit/deficiency
- Proto-Oncogene Proteins c-kit/genetics
- Receptor, ErbB-4
- Receptor, Nerve Growth Factor/genetics
- Receptor, Nerve Growth Factor/metabolism
- Receptors, Erythropoietin/genetics
- Receptors, Erythropoietin/metabolism
- Skin Neoplasms/genetics
- Skin Neoplasms/metabolism
- Skin Neoplasms/pathology
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Affiliation(s)
- Irina Mirkina
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
| | - Emir Hadzijusufovic
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
- Division of Hematology & Hemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
- Department/Clinic for Companion Animals and Horses, Clinic for Small Animals, Clinical Unit of Internal Medicine, University of Veterinary Medicine Vienna, Austria
| | - Clemens Krepler
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Mario Mikula
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
- Institute of Medical Genetics, Medical University of Vienna, Vienna, Austria
| | - Diana Mechtcheriakova
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
- Department of Pathophysiology & Allergy Research, Medical University of Vienna, Vienna, Austria
| | - Sabine Strommer
- Institute of Medical Genetics, Medical University of Vienna, Vienna, Austria
| | - Alexander Stella
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Erika Jensen-Jarolim
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
- Department of Pathophysiology & Allergy Research, Medical University of Vienna, Vienna, Austria
- Comparative Medicine, Messerli Research Institute, University of Veterinary Medicine, Medical University of Vienna and University Vienna, Vienna, Austria
| | - Christoph Höller
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Volker Wacheck
- Department of Clinical Pharmacology, Medical University of Vienna, Vienna, Austria
| | - Hubert Pehamberger
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
- Department of Dermatology, Medical University of Vienna, Vienna, Austria
| | - Peter Valent
- Ludwig Boltzmann Cluster Oncology, Medical University of Vienna, Vienna, Austria
- Division of Hematology & Hemostaseology, Department of Medicine I, Medical University of Vienna, Vienna, Austria
- * E-mail:
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Shepheard SR, Chataway T, Schultz DW, Rush RA, Rogers ML. The extracellular domain of neurotrophin receptor p75 as a candidate biomarker for amyotrophic lateral sclerosis. PLoS One 2014; 9:e87398. [PMID: 24475283 PMCID: PMC3903651 DOI: 10.1371/journal.pone.0087398] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 12/23/2013] [Indexed: 01/08/2023] Open
Abstract
Objective biomarkers for amyotrophic lateral sclerosis would facilitate the discovery of new treatments. The common neurotrophin receptor p75 is up regulated and the extracellular domain cleaved from injured neurons and peripheral glia in amyotrophic lateral sclerosis. We have tested the hypothesis that urinary levels of extracellular neurotrophin receptor p75 serve as a biomarker for both human motor amyotrophic lateral sclerosis and the SOD1G93A mouse model of the disease. The extracellular domain of neurotrophin receptor p75 was identified in the urine of amyotrophic lateral sclerosis patients by an immuno-precipitation/western blot procedure and confirmed by mass spectrometry. An ELISA was established to measure urinary extracellular neurotrophin receptor p75. The mean value for urinary extracellular neurotrophin receptor p75 from 28 amyotrophic lateral sclerosis patients measured by ELISA was 7.9±0.5 ng/mg creatinine and this was significantly higher (p<0.001) than 12 controls (2.6±0.2 ng/mg creatinine) and 19 patients with other neurological disease (Parkinson's disease and Multiple Sclerosis; 4.1±0.2 ng/mg creatinine). Pilot data of disease progression rates in 14 MND patients indicates that p75NTRECD levels were significantly higher (p = 0.0041) in 7 rapidly progressing patients as compared to 7 with slowly progressing disease. Extracellular neurotrophin receptor p75 was also readily detected in SOD1G93A mice by immuno-precipitation/western blot before the onset of clinical symptoms. These findings indicate a significant relation between urinary extracellular neurotrophin receptor p75 levels and disease progression and suggests that it may be a useful marker of disease activity and progression in amyotrophic lateral sclerosis.
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Affiliation(s)
- Stephanie R. Shepheard
- Department of Human Physiology and Centre for Neuroscience, Flinders University, Adelaide, South Australia, Australia
| | - Tim Chataway
- Department of Human Physiology and Centre for Neuroscience, Flinders University, Adelaide, South Australia, Australia
| | - David W. Schultz
- Neurology Department and MND Clinic, Flinders Medical Centre, Bedford Park, South Australia, Australia
| | - Robert A. Rush
- Department of Human Physiology and Centre for Neuroscience, Flinders University, Adelaide, South Australia, Australia
| | - Mary-Louise Rogers
- Department of Human Physiology and Centre for Neuroscience, Flinders University, Adelaide, South Australia, Australia
- * E-mail:
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18
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Mysona BA, Al-Gayyar MMH, Matragoon S, Abdelsaid MA, El-Azab MF, Saragovi HU, El-Remessy AB. Modulation of p75(NTR) prevents diabetes- and proNGF-induced retinal inflammation and blood-retina barrier breakdown in mice and rats. Diabetologia 2013; 56:2329-39. [PMID: 23918145 PMCID: PMC3791887 DOI: 10.1007/s00125-013-2998-6] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2013] [Accepted: 07/02/2013] [Indexed: 12/16/2022]
Abstract
AIMS/HYPOTHESIS Diabetic retinopathy is characterised by early blood-retina barrier (BRB) breakdown and neurodegeneration. Diabetes causes imbalance of nerve growth factor (NGF), leading to accumulation of the NGF precursor (proNGF), as well as the NGF receptor, p75 neurotrophin receptor (p75(NTR)), suggesting a possible pathological role of the proNGF-p75(NTR) axis in the diabetic retina. To date, the role of this axis in diabetes-induced retinal inflammation and BRB breakdown has not been explored. We hypothesised that modulating p75(NTR) would prevent diabetes- and proNGF-induced retinal inflammation and BRB breakdown. METHODS Diabetes was induced by streptozotocin in wild-type and p75(NTR) knockout (p75KO) mice. After 5 weeks, the expression of inflammatory mediators, ganglion cell loss and BRB breakdown were determined. Cleavage-resistant proNGF was overexpressed in rodent retinas with and without p75(NTR) short hairpin RNA or with pharmacological inhibitors. In vitro, the effects of proNGF were investigated in retinal Müller glial cell line (rMC-1) and primary Müller cells. RESULTS Deletion of p75(NTR) blunted the diabetes-induced decrease in retinal NGF expression and increases in proNGF, nuclear factor κB (NFκB), p-NFκB and TNF-α. Deletion of p75(NTR) also abrogated diabetes-induced glial fibrillary acidic protein expression, ganglion cell loss and vascular permeability. Inhibited expression or cleavage of p75(NTR) blunted proNGF-induced retinal inflammation and vascular permeability. In vitro, proNGF induced p75(NTR)-dependent production of inflammatory mediators in primary wild-type Müller and rMC-1 cultures, but not in p75KO Müller cells. CONCLUSIONS/INTERPRETATION The proNGF-p75(NTR) axis contributes to retinal inflammation and vascular dysfunction in the rodent diabetic retina. These findings underscore the importance of p75(NTR) as a novel regulator of inflammation and potential therapeutic target in diabetic retinopathy.
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Affiliation(s)
- Barbara A Mysona
- Program in Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia, 1120 15th Street HM-1200, Augusta, GA 30912, USA
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Anagnostopoulou V, Pediaditakis I, Alkahtani S, Alarifi SA, Schmidt EM, Lang F, Gravanis A, Charalampopoulos I, Stournaras C. Differential effects of dehydroepiandrosterone and testosterone in prostate and colon cancer cell apoptosis: the role of nerve growth factor (NGF) receptors. Endocrinology 2013; 154:2446-56. [PMID: 23696568 DOI: 10.1210/en.2012-2249] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Tumor growth is fostered by inhibition of cell death, which involves the receptiveness of tumor to growth factors and hormones. We have recently shown that testosterone exerts proapoptotic effects in prostate and colon cancer cells through a membrane-initiated mechanism. In addition, we have recently reported that dehydroepiandrosterone (DHEA) can control cell fate, activating nerve growth factor (NGF) receptors, namely tropomyosin-related kinase (Trk)A and p75 neurotrophin receptor, in primary neurons and in PC12 tumoral cells. NGF was recently involved in cancer cell proliferation and apoptosis. In the present study, we explored the cross talk between androgens (testosterone and DHEA) and NGF in regulating apoptosis of prostate and colon cancer cells. DHEA and NGF strongly blunted serum deprivation-induced apoptosis, whereas testosterone induced apoptosis of both cancer cell lines. The antiapoptotic effect of both DHEA and NGF was completely reversed by testosterone. In line with this, DHEA or NGF up-regulated, whereas testosterone down-regulated, the expression of TrkA receptor. The effects of androgens were abolished in both cell lines in the presence of TrkA inhibitor. DHEA induced the phosphorylation of TrkA and the interaction of p75 neurotrophin receptor with its effectors, Rho protein GDP dissociation inhibitor and receptor interacting serine/threonine-protein kinase 2. Conversely, testosterone was unable to activate both receptors. Testosterone acted as a DHEA and NGF antagonist, by blocking the activation of both receptors by DHEA or NGF. Our findings suggest that androgens may influence hormone-sensitive tumor cells via their cross talk with NGF receptors. The interplay between steroid hormone and neurotrophins signaling in hormone-dependent tumors offers new insights in the pathophysiology of these neoplasias.
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20
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Baeza-Raja B, Eckel-Mahan K, Zhang L, Vagena E, Tsigelny IF, Sassone-Corsi P, Ptáček LJ, Akassoglou K. p75 neurotrophin receptor is a clock gene that regulates oscillatory components of circadian and metabolic networks. J Neurosci 2013; 33:10221-34. [PMID: 23785138 PMCID: PMC3685830 DOI: 10.1523/jneurosci.2757-12.2013] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 04/01/2013] [Accepted: 05/01/2013] [Indexed: 01/09/2023] Open
Abstract
The p75 neurotrophin receptor (p75(NTR)) is a member of the tumor necrosis factor receptor superfamily with a widespread pattern of expression in tissues such as the brain, liver, lung, and muscle. The mechanisms that regulate p75(NTR) transcription in the nervous system and its expression in other tissues remain largely unknown. Here we show that p75(NTR) is an oscillating gene regulated by the helix-loop-helix transcription factors CLOCK and BMAL1. The p75(NTR) promoter contains evolutionarily conserved noncanonical E-box enhancers. Deletion mutagenesis of the p75(NTR)-luciferase reporter identified the -1039 conserved E-box necessary for the regulation of p75(NTR) by CLOCK and BMAL1. Accordingly, gel-shift assays confirmed the binding of CLOCK and BMAL1 to the p75(NTR-)1039 E-box. Studies in mice revealed that p75(NTR) transcription oscillates during dark and light cycles not only in the suprachiasmatic nucleus (SCN), but also in peripheral tissues including the liver. Oscillation of p75(NTR) is disrupted in Clock-deficient and mutant mice, is E-box dependent, and is in phase with clock genes, such as Per1 and Per2. Intriguingly, p75(NTR) is required for circadian clock oscillation, since loss of p75(NTR) alters the circadian oscillation of clock genes in the SCN, liver, and fibroblasts. Consistent with this, Per2::Luc/p75(NTR-/-) liver explants showed reduced circadian oscillation amplitude compared with those of Per2::Luc/p75(NTR+/+). Moreover, deletion of p75(NTR) also alters the circadian oscillation of glucose and lipid homeostasis genes. Overall, our findings reveal that the transcriptional activation of p75(NTR) is under circadian regulation in the nervous system and peripheral tissues, and plays an important role in the maintenance of clock and metabolic gene oscillation.
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Affiliation(s)
| | - Kristin Eckel-Mahan
- Center for Epigenetics and Metabolism, Department of Biological Chemistry, University of California, Irvine, Irvine, California 92697, and
| | | | | | - Igor F. Tsigelny
- San Diego Supercomputer Center and Department of Neurosciences, University of California, San Diego, La Jolla, California 92093
| | - Paolo Sassone-Corsi
- Center for Epigenetics and Metabolism, Department of Biological Chemistry, University of California, Irvine, Irvine, California 92697, and
| | - Louis J. Ptáček
- Department of Neurology, and
- Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, California 94158
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21
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Tuo Y, Jiang MH, Cai B, Deng CH, Xiang P. [Expression of P75NTR in the testis of nestin-GFP transgenic mice]. Zhonghua Nan Ke Xue 2013; 19:392-397. [PMID: 23757958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE To explore the P75NTR expression in the mouse testis and its relationship with nestin. METHODS We observed the location of the expressions of P75NTR and nestin in the testis of the nestin-GFP transgenic mouse on postnatal day (PND) 5, 14 and 30 using immunofluorescence, and detected the expression levels of P75NTR in the testicular tissue of mice in different age groups by real-time quantitative PCR (RTqPCR) and flow cytometry. Then we cultured the P75NTR positive cells in neural stem cell culture medium and observed their neuronal differentiation capacity by orientation differentiation. RESULTS Immunofluorescence showed the expressions of P75NTR and nestin in the Leydig cells of the mouse testis. RTqPCR and flow cytometry exhibited the peak of the P75NTR expression on PND 14. The positive rates of P75NTR were (2.88 +/- 0.52), (9.54 +/- 1.81) and (2.63 +/- 0.43)% on PND 5, 14 and 30, respectively. The P75NTR positive cells obtained also expressed nestin and P75NTR and had the capacity of neuronal differentiation. CONCLUSION P75NTR and nestin are co-expressed in the Leydig cells of the mouse testis, and the P75NTR positive cells have the ability of neural differentiation, which is presumably attributed to neural crest cells.
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Affiliation(s)
- Ying Tuo
- Center for Stem Cell Biology and Tissue Engineering, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong 510080, China
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22
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Ahmed Z, Douglas MR, John G, Berry M, Logan A. AMIGO3 is an NgR1/p75 co-receptor signalling axon growth inhibition in the acute phase of adult central nervous system injury. PLoS One 2013; 8:e61878. [PMID: 23613963 PMCID: PMC3628841 DOI: 10.1371/journal.pone.0061878] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Accepted: 03/17/2013] [Indexed: 12/18/2022] Open
Abstract
Axon regeneration in the injured adult CNS is reportedly inhibited by myelin-derived inhibitory molecules, after binding to a receptor complex comprised of the Nogo-66 receptor (NgR1) and two transmembrane co-receptors p75/TROY and LINGO-1. However, the post-injury expression pattern for LINGO-1 is inconsistent with its proposed function. We demonstrated that AMIGO3 levels were significantly higher acutely than those of LINGO-1 in dorsal column lesions and reduced in models of dorsal root ganglion neuron (DRGN) axon regeneration. Similarly, AMIGO3 levels were raised in the retina immediately after optic nerve crush, whilst levels were suppressed in regenerating optic nerves, induced by intravitreal peripheral nerve implantation. AMIGO3 interacted functionally with NgR1-p75/TROY in non-neuronal cells and in brain lysates, mediating RhoA activation in response to CNS myelin. Knockdown of AMIGO3 in myelin-inhibited adult primary DRG and retinal cultures promoted disinhibited neurite growth when cells were stimulated with appropriate neurotrophic factors. These findings demonstrate that AMIGO3 substitutes for LINGO-1 in the NgR1-p75/TROY inhibitory signalling complex and suggests that the NgR1-p75/TROY-AMIGO3 receptor complex mediates myelin-induced inhibition of axon growth acutely in the CNS. Thus, antagonizing AMIGO3 rather than LINGO-1 immediately after CNS injury is likely to be a more effective therapeutic strategy for promoting CNS axon regeneration when combined with neurotrophic factor administration.
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Affiliation(s)
- Zubair Ahmed
- Neuropharmacology and Neurobiology Section, School of Clinical and Experimental Medicine, University of Birmingham, Birmingham, United Kingdom.
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Light JE, Koyama H, Minturn JE, Ho R, Simpson AM, Iyer R, Mangino JL, Kolla V, London WB, Brodeur GM. Clinical significance of NTRK family gene expression in neuroblastomas. Pediatr Blood Cancer 2012; 59:226-32. [PMID: 21990266 PMCID: PMC3258457 DOI: 10.1002/pbc.23343] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Accepted: 08/17/2011] [Indexed: 12/19/2022]
Abstract
BACKGROUND Neuroblastomas (NBs) are characterized by clinical heterogeneity, from spontaneous regression to relentless progression. The pattern of NTRK family gene expression contributes to these disparate behaviors. TrkA/NTRK1 is expressed in favorable NBs that regress or differentiate, whereas TrkB/NTRK2 and its ligand brain-derived neurotrophic factor (BDNF) are co-expressed in unfavorable NBs, representing an autocrine survival pathway. We determined the significance of NTRK family gene expression in a large, representative set of primary NBs. PATIENTS AND METHODS We analyzed the expression of the following genes in 814 NBs using quantitative real-time reverse transcriptase polymerase chain reaction (RT-PCR): NTRK1, NTRK2, NTRK3, P75/NGFR, nerve growth factor (NGF), BDNF, IGFR1, and EGFR. Expression (high vs. low) was dichotomized by median expression value and compared to clinical and biological variables as well as outcome. RESULTS High NTRK1 expression was strongly correlated with favorable age, stage, MYCN status, histology, ploidy, risk group, and outcome (P < 0.0001 for all). However, it did not add significantly to the panel of prognostic variables currently used for cooperative group trials. NTRK2 expression was associated with risk factors but not with outcome. High NGF expression was also associated with most risk factors and weakly with unfavorable outcome. CONCLUSIONS High expression of NTRK1 is strongly associated with favorable risk factors and outcome in a large, representative population of NB patients. It did not add significantly to the current risk prediction algorithm, but it may contribute to future expression classifiers. Indeed, prospective assessment of NTRK1 and NTRK2 expression will identify tumors that would be candidates for NTRK-targeted therapy, either alone or in combination with conventional agents.
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Affiliation(s)
- Jennifer E Light
- Division of Oncology, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
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Li H, Shi H, Huo K. p75NTR signal transduction suppressed by BFAR and p75NTR interactions. Sci China Life Sci 2012; 55:367-74. [PMID: 22566094 DOI: 10.1007/s11427-012-4306-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Accepted: 03/02/2012] [Indexed: 11/26/2022]
Abstract
p75NTR is a low-affinity nerve growth factor receptor, which promotes cell proliferation as a positive modulator of high-affinity receptor TrkA, as well as binds with cell ligands to induce apoptosis and mediate death signals. To analyze the regulatory mechanisms of p75NTR, the present study utilized a new membrane yeast two-hybrid system to screen a human fetal brain cDNA library. Results identified BFAR, a novel protein that interacts with p75NTR. Interaction specificity was verified by membrane yeast two-hybrid co-transformation assays, in vitro GST pull-down assays, and in vitro co-immunoprecipitation assays. The fluorescent subcellular localization assay revealed that the two proteins co-localized within the cytoplasm. BFAR overexpression in PC-12 and HEK293T cells inhibited the NFκB and JNK signaling pathway, as determined with the luciferase test. Co-transfected p75NTR and BFAR in HEK293T or PC-12 cells, respectively, increased the percentage of cells in the G2/M phase, decreased the number of S-phase cells, and did not change the number of G0/G1-phase cells.
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Affiliation(s)
- Hongmei Li
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
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25
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Li B, Sheng X, Song M, Zhang H, Weng J, Zhang M, Hu X, Zhou J, Xu M, Weng Q, Watanabe G, Taya K. Expression of nerve growth factor and its receptors TrkA and p75 in the uterus of wild female ground squirrel (Citellus dauricus Brandt). Gen Comp Endocrinol 2012; 176:62-9. [PMID: 22226760 DOI: 10.1016/j.ygcen.2011.12.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2011] [Revised: 12/04/2011] [Accepted: 12/19/2011] [Indexed: 10/14/2022]
Abstract
In this study, we investigated the presence of nerve growth factor (NGF) and its receptors tyrosine kinase A (TrkA) and p75 in the uterus of the wild ground squirrels during the estrous period, early pregnancy and non-breeding period. In the estrous period and early pregnancy, NGF and TrkA were immunolocalized in stromal cells, luminal epithelial cells, glandular cells and smooth muscle cells whereas in the non-breeding period, both of them were detected only in luminal epithelial cells and glandular cells, but not in stromal cells or smooth muscle cells. Stronger immunostaining of NGF and TrkA was observed in luminal epithelial cells and glandular cells in the estrous period and early pregnancy as compared to the non-breeding period. p75 was immunolocalized only in luminal epithelial and glandular cells during the estrous period, early pregnancy and non-breeding period. The intensity of the immunohistochemical signals for p75 did not vary significantly in the estrous period, early pregnancy and non-breeding period. The mean mRNA levels of NGF and TrkA and p75 were significantly higher in the estrous period and early pregnancy as compared to the non-breeding period. Besides, plasma estradiol-17β and progesterone concentrations were higher in the estrous period and early pregnancy than in the non-breeding period, suggesting that the expression patterns of NGF and TrkA are correlated with changes in plasma estradiol-17β and progesterone concentrations. These results indicate that NGF and its receptor TrkA may be involved in the regulation of seasonal changes in the uterine functions of wild female ground squirrels.
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Affiliation(s)
- Ben Li
- College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, PR China.
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Selimovic D, Sprenger A, Hannig M, Haïkel Y, Hassan M. Apoptosis related protein-1 triggers melanoma cell death via interaction with the juxtamembrane region of p75 neurotrophin receptor. J Cell Mol Med 2012; 16:349-61. [PMID: 21418516 PMCID: PMC3823298 DOI: 10.1111/j.1582-4934.2011.01304.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Accepted: 03/15/2011] [Indexed: 12/03/2022] Open
Abstract
Although chemotherapeutic drugs could theoretically target all metastatic sites, current treatments do not provide complementary therapeutics. Therefore, the development of an alternative approach replacing the traditional therapy is urgently needed. To assess the killing efficiency of the functionally identified apoptosis-related protein (APR)-1 in melanoma cells, we established a system for the regulated expression of APR-1. The induction of APR-1 expression caused apoptosis of melanoma cells via the interaction with the juxtamembrane region of p75 neurotrophin receptor (p75NTR), and possible also via the competition with tumour necrosis factor receptor-associated factor-6 (TRAF6) and the catalytic receptor of neurotrophin (Trk) for the same p75NTR interacting site. The accumulation of APR-1 in melanoma cells may block the physical association of p75NRT with TRAF6 and/or Trk, leading to the disruption of both NF-κB and extracellular signal-regulated kinase (ERK) pathways. Also, accumulation of APR-1 protein enhanced the activity of both c-Jun-N-terminal kinase (JNK) and p38 pathways. However, the analysis of APR-1-modulated pathways demonstrated the involvement of apoptosis-regulating kinase 1-JNK/p38 pathway in the induction of Bax expression leading to both mitochondrial dysregulation [as demonstrated by the loss of mitochondrial membrane potential, the release of both cytochrome c and apoptosis-inducing factor into cytoplasm, and cleavage of caspase-9, caspase-3 and poly (ADP-ribose) polymerase (PARP)] and endoplasmic reticulum stress as demonstrated by the increase of intracellular Ca(2+) release. Thus, besides the analysis of its pro-apoptotic function, our data provide insight into the molecular mechanism of APR-1-induced apoptosis of melanoma cells.
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Affiliation(s)
- Denis Selimovic
- Institut National de la Santé et de la Recherche Médicale (INSERM U977), University of StrasbourgStrasbourg, France
- Department of Oral Medicine and Surgery, Dental Faculty, University of StrasbourgStrasbourg, France
| | - Achim Sprenger
- Laboratory for Molecular Tumour Therapy, Clinic of Dermatology, University Hospital of DuesseldorfDuesseldorf, Germany
| | - Matthias Hannig
- Department of Operative Dentistry and Preventive Dentistry, Saarland UniversityHomburg/Saar, Germany
| | - Youssef Haïkel
- Institut National de la Santé et de la Recherche Médicale (INSERM U977), University of StrasbourgStrasbourg, France
- Department of Operative Dentistry and Endodontics, Dental Faculty, University of StrasbourgStrasbourg, France
| | - Mohamed Hassan
- Institut National de la Santé et de la Recherche Médicale (INSERM U977), University of StrasbourgStrasbourg, France
- Laboratory for Molecular Tumour Therapy, Clinic of Dermatology, University Hospital of DuesseldorfDuesseldorf, Germany
- Department of Operative Dentistry and Endodontics, Dental Faculty, University of StrasbourgStrasbourg, France
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Zhang C, Helmsing S, Zagrebelsky M, Schirrmann T, Marschall ALJ, Schüngel M, Korte M, Hust M, Dübel S. Suppression of p75 neurotrophin receptor surface expression with intrabodies influences Bcl-xL mRNA expression and neurite outgrowth in PC12 cells. PLoS One 2012; 7:e30684. [PMID: 22292018 PMCID: PMC3265506 DOI: 10.1371/journal.pone.0030684] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Accepted: 12/20/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Although p75 neurotrophin receptor (p75NTR) is the first neurotrophin receptor isolated, its diverse physiological functions and signaling have remained elusive for many years. Loss-of-function phenotypic analyses for p75NTR were mainly focused at the genetic level; however these approaches were impacted by off-target effect, insufficient stability, unspecific stress response or alternative active splicing products. In this study, p75NTR surface expression was suppressed for the first time at the protein level by endoplasmic reticulum (ER) retained intrabodies. RESULTS Three monoclonal recombinant antibody fragments (scFv) with affinities in the low nanomolar range to murine p75NTR were isolated by antibody phage display. To suppress p75NTR cell surface expression, the encoding genes of these scFvs extended by the ER retention peptide KDEL were transiently transfected into the neuron-like rat pheochromocytoma cell line PC12 and the mouse neuroblastoma x mouse spinal cord hybrid cell line NSC19. The ER retained intrabody construct, SH325-G7-KDEL, mediated a downregulation of p75NTR cell surface expression as shown by flow cytometry. This effect was maintained over a period of at least eight days without activating an unfolded protein response (UPR). Moreover, the ER retention of p75NTR resulted in downregulation of mRNA levels of the anti-apoptotic protein Bcl-xL as well as in strong inhibition of NGF-induced neurite outgrowth in PC12 cells. CONCLUSION The ER retained intrabody SH325-G7-KDEL not only induces phenotypic knockdown of this p75NTR but also p75NTR-associated cellular responses in PC12 cells.
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MESH Headings
- Animals
- Antibodies, Monoclonal/pharmacology
- Antigens, Surface/genetics
- Antigens, Surface/metabolism
- Cells, Cultured
- Down-Regulation/drug effects
- Down-Regulation/genetics
- Endoplasmic Reticulum/drug effects
- Endoplasmic Reticulum/metabolism
- Gene Expression Regulation/drug effects
- HEK293 Cells
- Humans
- Mice
- Models, Biological
- Neurites/drug effects
- Neurites/metabolism
- Neurites/physiology
- PC12 Cells
- Protein Transport/drug effects
- Protein Transport/physiology
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rats
- Receptor, Nerve Growth Factor/antagonists & inhibitors
- Receptor, Nerve Growth Factor/genetics
- Receptor, Nerve Growth Factor/immunology
- Receptor, Nerve Growth Factor/metabolism
- Recombinant Fusion Proteins/pharmacology
- bcl-X Protein/genetics
- bcl-X Protein/metabolism
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Affiliation(s)
- Congcong Zhang
- Institute for Biochemistry and Biotechnology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Saskia Helmsing
- Institute for Biochemistry and Biotechnology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Marta Zagrebelsky
- Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
| | - Thomas Schirrmann
- Institute for Biochemistry and Biotechnology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Andrea L. J. Marschall
- Institute for Biochemistry and Biotechnology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Manuela Schüngel
- Integrated Research and Treatment Center Transplantation, Medical School of Hannover, Hannover, Germany
| | - Martin Korte
- Zoological Institute, Technische Universität Braunschweig, Braunschweig, Germany
| | - Michael Hust
- Institute for Biochemistry and Biotechnology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Stefan Dübel
- Institute for Biochemistry and Biotechnology, Technische Universität Braunschweig, Braunschweig, Germany
- * E-mail:
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Bellanger C, Dubanet L, Lise MC, Fauchais AL, Bordessoule D, Jauberteau MO, Troutaud D. Endogenous neurotrophins and Trk signaling in diffuse large B cell lymphoma cell lines are involved in sensitivity to rituximab-induced apoptosis. PLoS One 2011; 6:e27213. [PMID: 22076137 PMCID: PMC3208602 DOI: 10.1371/journal.pone.0027213] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Accepted: 10/12/2011] [Indexed: 12/13/2022] Open
Abstract
Background Diffuse large B-cell lymphoma (DLBCL) is a common and often fatal malignancy. Immunochemotherapy, a combination of rituximab to standard chemotherapy, has resulted in improved survival. However a substantial proportion of patients still fail to reach sustained remission. We have previously demonstrated that autocrine brain-derived neurotrophic factor (BDNF) production plays a function in human B cell survival, at least partly via sortilin expression. As neurotrophin receptor (Trks) signaling involved activation of survival pathways that are inhibited by rituximab, we speculated that neurotrophins may provide additional support for tumour cell survival and therapeutic resistance in DLBCL. Methodology/Principal Findings In the present study, we used two DLBCL cell lines, SUDHL4 and SUDHL6, known to be respectively less and more sensitive to rituximab. We found by RT-PCR, western blotting, cytometry and confocal microscopy that both cell lines expressed, in normal culture conditions, BDNF and to a lesser extent NGF, as well as truncated TrkB and p75NTR/sortilin death neurotrophin receptors. Furthermore, BDNF secretion was detected in cell supernatants. NGF and BDNF production and Trk receptor expression, including TrkA, are regulated by apoptotic conditions (serum deprivation or rituximab exposure). Indeed, we show for the first time that rituximab exposure of DLBCL cell lines induces NGF secretion and that differences in rituximab sensitivity are associated with differential expression patterns of neurotrophins and their receptors (TrkA). Finally, these cells are sensitive to the Trk-inhibitor, K252a, as shown by the induction of apoptosis. Furthermore, K252a exhibits additive cytotoxic effects with rituximab. Conclusions/Significance Collectively, these data strongly suggest that a neurotrophin axis, such NGF/TrkA pathway, may contribute to malignant cell survival and rituximab resistance in DLBCL.
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MESH Headings
- Antibodies, Monoclonal, Murine-Derived/therapeutic use
- Antineoplastic Agents/therapeutic use
- Blotting, Western
- Brain-Derived Neurotrophic Factor/genetics
- Brain-Derived Neurotrophic Factor/metabolism
- Drug Resistance, Neoplasm
- Enzyme-Linked Immunosorbent Assay
- Flow Cytometry
- Fluorescent Antibody Technique
- Humans
- Immunoenzyme Techniques
- Lymphoma, B-Cell/drug therapy
- Lymphoma, B-Cell/metabolism
- Lymphoma, Large B-Cell, Diffuse/drug therapy
- Lymphoma, Large B-Cell, Diffuse/metabolism
- Nerve Growth Factor/metabolism
- Nerve Growth Factors/genetics
- Nerve Growth Factors/metabolism
- RNA, Messenger/genetics
- Real-Time Polymerase Chain Reaction
- Receptor, Nerve Growth Factor/genetics
- Receptor, Nerve Growth Factor/metabolism
- Receptor, trkA/genetics
- Receptor, trkA/metabolism
- Receptor, trkB/genetics
- Receptor, trkB/metabolism
- Receptor, trkC/genetics
- Receptor, trkC/metabolism
- Rituximab
- Tumor Cells, Cultured
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Affiliation(s)
| | | | | | | | - Dominique Bordessoule
- UMR CNRS 6101, Université de Limoges, Limoges, France
- Structure Régionale de Référence des Lymphomes du Limousin, CHU Limoges, Limoges, France
- Service d'Hématologie Clinique, CHU Limoges, Limoges, France
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Stavchanskiĭ VV, Tvorogova TV, Botsina AI, Skvortsova VI, Limborskaia SA, Miasoedov NF, Dergunova LV. [The effect of semax and its C-end peptide PGP on expression of the neurotrophins and their receptors in the rat brain during incomplete global ischemia]. Mol Biol (Mosk) 2011; 45:1026-1035. [PMID: 22295573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Neurotrophins regulate key function of nervous tissue cells. Analysis of neurotrophins mRNA expression is an appropriate tool to assess therapeutic efficiency of the anti-stroke drugs. We have analyzed the effect of synthetic peptide semax and its C-terminal Pro-Gly-Pro tripeptide upon mRNAs expression of neurotrophins Ngf, Bdrf, Nt-3 and their receptors TrkA, TrkB, TrkC, p75 in rat frontal lobes, hippocampus and cerebellum after bilateral common carotid artery occlusion. The animals were decapitated 30 min, 1, 2, 4, 8, 12, 24 h after the operation. The mRNA expression of neurotrophins and their receptors was assessed by relative quantification using real-time RT-PCR. Our showed that ischemia causes a significant decrease in gene expression in the hippocampus. Semax and PGP affected the expression of neurotrophins and their receptors predominantly in the frontal cortex and hippocampus of the ischemized animals. In the frontal cortex, Semax treatment resulted in a decrease of mRNA level of receptors, while PGP treatment increased the level of these mRNA. Maximal neuroprotective effect of both peptides has been observed in the hippocampus 12 h after occlusion. A decrease of gene expression of neurotrophins and their receptors caused by the occlusion was overcome by Semax and PGP. These results clarify the semax mechanism of and present certain features of mRNA's expression of neurotrophins and their receptors in experimental conditions.
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MESH Headings
- Adrenocorticotropic Hormone/analogs & derivatives
- Adrenocorticotropic Hormone/pharmacology
- Animals
- Brain Ischemia/metabolism
- Brain-Derived Neurotrophic Factor/genetics
- Brain-Derived Neurotrophic Factor/metabolism
- Gene Expression Regulation/drug effects
- Hippocampus/drug effects
- Hippocampus/metabolism
- Male
- Nerve Growth Factor/genetics
- Nerve Growth Factor/metabolism
- Nerve Growth Factors/genetics
- Oligopeptides/pharmacology
- Peptide Fragments/pharmacology
- Proline/analogs & derivatives
- Proline/pharmacology
- RNA, Messenger/drug effects
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Rats
- Rats, Wistar
- Receptor, Nerve Growth Factor/genetics
- Receptor, Nerve Growth Factor/metabolism
- Receptor, trkA/genetics
- Receptor, trkA/metabolism
- Receptor, trkB/genetics
- Receptor, trkB/metabolism
- Receptor, trkC/genetics
- Receptor, trkC/metabolism
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Ziegler L, Grigoryan S, Yang IH, Thakor NV, Goldstein RS. Efficient generation of schwann cells from human embryonic stem cell-derived neurospheres. Stem Cell Rev Rep 2011; 7:394-403. [PMID: 21052870 DOI: 10.1007/s12015-010-9198-2] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Schwann cells (SC), the glial cells of peripheral nerves, are involved in many diseases including Charcot Marie Tooth and neurofibromatosis, and play a pivotal role in peripheral nerve regeneration. Although it is possible to obtain human SC from nerve biopsies, they are difficult to maintain and expand in culture. Here we describe an efficient system for directing the differentiation of human embryonic stem cells (hESC) into cells with the morphological and molecular characteristics of SC. Neurospheres were generated from hESC using stromal cell induction and grown under conditions supportive of SC differentiation. After 8 weeks, hESC-derived SC expressed characteristic markers GFAP, S100, HNK1, P75, MBP and PMP-22, and were observed in close association with hESC-derived neurites. ~60% of the cells were double-immunostained for the SC markers GFAP/S100. RT-PCR analysis confirmed the expression of GFAP, S100, P75, PMP-22 and MBP and demonstrated expression of the SC markers P0, KROX20 and PLP in the cultures. Expression of CAD19 was observed in 2 and 4 week cultures and then was down-regulated, consistent with its expression in SC precursor, but not mature stages. Co-culture of hESC-derived SC with rat, chick or hESC-derived axons in compartmentalized microfluidic chambers resulted in tight association of the SC with axons. Apparent wrapping of the axons by SC was occasionally observed, suggestive of myelination. Our method for generating SC from hESC makes available a virtually unlimited source of human SC for studies of their role in nerve regeneration and modeling of disease.
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Affiliation(s)
- Lina Ziegler
- Mina and Everard Goodman Faculty of Life Sciences, Bar-Ilan University, Gonda Building, Old Campus, 52900, Ramat-Gan, Israel
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31
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Li HP, Liu Y, He XJ, Xe SY, Chen J, Feng DX. [P75 neurotrophin receptor mRNA sequential expression and significance after Cauda equina compression in rats]. Zhongguo Gu Shang 2011; 24:509-513. [PMID: 21786560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
OBJECTIVE To observe the mRNA expression of p75NTR (p75 neurotrophin receptor) and the amount of neuronal cells apoptosis in lumbar-sacral spinal cord at different time points after the acute cauda equina compression in rats and to explore their correlation. METHODS Sixty adult female Sprague Dawley(SD) rats were randomly divided into the normal control group and the compression groups. The acute cauda equine compression model was established as placing a silicon gel rubber at L(3,4) level of the vertebral canal which represented about 70% to 80% compression to the cross section. The whole L(1,2) level of spinal cords were harvested at 1, 3, 5, 7, 14, 28 d after operation in compression group. Tunel method was applied to observe cell apoptosis and RT-PCR was used to detect the p75NTR mRNA expression. SPSS 13.0 statistical software was adopted to help analysis. RESULTS In the compression group, both the nerve cells apoptosis and the p75 mRNA expression existed the trend of low-high-low synchronally compared with the control group, there was a significant difference (P < 0.05) among comprssion groups at different time points,there was a significant difference in changes (P < 0.05). p75NTR of mRNA expression and lumbosacral nerve cells apoptosis was in a positive correlation. CONCLUSION After acute cauda equina compression, p75NTR mRNA expression is closely related to the neuronal apoptosis, which plays an important role in the molecular mechanism of the CES.
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Affiliation(s)
- Hao-peng Li
- The Second Department of Orthopaedics, the Second Hospital Affiliated to Medical College of Jiaotong University of Xi 'an, Xi'an 710004, Shaanxi, China.
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Poopalasundaram S, Marler KJM, Drescher U. EphrinA6 on chick retinal axons is a key component for p75(NTR)-dependent axon repulsion and TrkB-dependent axon branching. Mol Cell Neurosci 2011; 47:131-6. [PMID: 21463686 DOI: 10.1016/j.mcn.2011.03.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2010] [Revised: 03/24/2011] [Accepted: 03/25/2011] [Indexed: 11/18/2022] Open
Abstract
A characteristic of the ephrin/Eph family is their capacity for bi-directional signalling. This means that an ephrin, for example, can function either as a ligand for an Eph 'receptor', or as a receptor for an Eph 'ligand'. A system in which this phenomenon is well studied is the retinotectal projection in which the guidance of retinal ganglion cell (RGC) axons to their target area in the tectum is controlled by both Ephs and ephrins expressed in gradients in both the retina and tectum. Here we have analysed the receptor function of ephrinAs on RGC axons in further detail by focussing on ephrinA6, which is the most strongly expressed ephrinA in the chick retina. EphrinAs are GPI-anchored proteins and therefore require the interaction with transmembrane proteins to exert this receptor function. Previous work has shown that ephrinAs interact on RGC axons in cis with the neurotrophin receptors p75(NTR) and TrkB. P75(NTR) then was shown to be necessary for the repulsion of ephrinA-expressing RGC axons from an EphA substrate and for the downregulation of axon branching. In turn, an interaction of ephrinAs with TrkB as well as an increase in axonal ephrinA expression augments the axon branch-promoting activity of TrkB. We now show that ephrinA6 is the necessary ephrinA component of the repulsive ephrinA/p75(NTR) receptor complex on chick RGC axons as axons lacking ephrinA6 no longer avoid an EphA matrix in stripe assay experiments. We also demonstrate that the branch-promoting activity of TrkB is dependent on ephrinA6 as a knockdown of ephrinA6 renders RGC axons insensitive to BDNF, the high affinity ligand for TrkB. In sum our data further strengthen the hypothesis that a fine-tuned interplay of ephrinAs with p75(NTR) and TrkB is important for the guidance and branching of RGC axons.
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Affiliation(s)
- Subathra Poopalasundaram
- MRC Centre for Developmental Neurobiology, King's College London, New Hunt's House, Guy's Campus, London SE11UL, UK.
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Abstract
Necdin is a protein known to interact with the neurotrophin receptors, neurotrophic tyrosine kinase receptor type 1 (TrkA) and 75 kD low-affinity neurotrophin receptor (p75NTR). TrkA and p75NTR play roles in development and disease of the nervous system and chemoresistance of nervous system tumors. Necdin deletion is associated with Prader-Willi syndrome. The present studies demonstrate that the effects of necdin on the susceptibility of neuroblastoma cells to oxidant stress are dependent on the ratio of p75NTR to TrkA in the cell. In low p75NTR:TrkA ratio cells, necdin down-regulation decreases sensitivity to oxidant stress and expression of and signaling through TrkA. In high p75NTR:TrkA cells, necdin down-regulation is without effect. The effects of necdin deletion on the developing nervous system may depend on the relative expression of p75NTR and TrkA in the cells of particular regions of the nervous system.
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Affiliation(s)
- Christopher A Ingraham
- Department of Pediatrics, University of Rochester Medical Center, Rochester, New York 14642, USA
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Hou Y, Li L, Hu M, Jiang GY, Wang Q, Qian DM, Yan ZY, Zhao W, Song XX, Wang B. [Effect of HSV-1 infection on NGF and its receptor expression in human glioma cells]. Bing Du Xue Bao 2010; 26:477-482. [PMID: 21344753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Nerve growth factor (NGF) is mainly secreted by the neuroglia cells, which can exert biological effect through its receptors on the specific target cell surface. NGF is closely related to neurocyte growth, differentiation and apoptosis. As a neurotropic virus, HSV-1 an easily lead to neurocyte, neuroglia cells death or apoptosis. In this study, the U251 human glioma cells were chosen as target cells to study the change of NGF and its receptors in the apoptosis process of HSV-1 infection. Our results showed that U251 cells were permissive to HSV-1 replication. In the apoptosis process of HSV-1 infected U251 cells, the expression of both NGF and P75NTR increased and then decreased, while the expression of TrkA decreased gradually. These result indicated that HSV-1 was able to induce the abnormal expression of NGF and its receptors in U251 cells.
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Affiliation(s)
- Yun Hou
- Department of Microbiology, Key Laboratory of Medicine and Biotechnology of Qingdao, Qingdao University Medical College, Qingdao 266071, China.
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Abstract
OBJECTIVES Carotenoids and retinoic acid derivatives are topically applied for sun-protective and whitening purposes. Fucoxanthin is a carotenoid derived from edible sea algae, but its effect on melanogenesis has not been established. Therefore, we examined the effect of fucoxanthin on melanogenesis. METHODS Inhibitory effects on tyrosinase activity, melanin formation in B16 melanoma and skin pigmentation in UVB-irradiated guinea-pigs were evaluated. To elucidate the action of fucoxanthin on melanogenesis, its effect on skin melanogenic mRNA expression was evaluated in UVB-irradiated mice. Fucoxanthin was given topically or orally to mice once a day and UVB irradiation was applied for 14 days. The effect of fucoxanthin on skin melanogenic mRNA expression was evaluated by real time reverse transcription polymerase chain reaction. KEY FINDINGS Fucoxanthin inhibited tyrosinase activity, melanogenesis in melanoma and UVB-induced skin pigmentation. Topical application of fucoxanthin (1%) significantly suppressed mRNA expression of cyclooxygenase (COX)-2, endothelin receptor A, p75 neurotrophin receptor (NTR), prostaglandin E receptor 1 (EP1), melanocortin 1 receptor (MC1R) and tyrosinase-related protein 1. The suppression of p75NTR, EP1 and MC1R expressions was observed at 0.01% application. Also, oral application of fucoxanthin (10 mg/kg) significantly suppressed expression of COX-2, p75NTR, EP1 and MC1R. CONCLUSIONS These results suggest that fucoxanthin exhibits anti-pigmentary activity by topical or oral application in UVB-induced melanogenesis. This effect of fucoxanthin may be due to suppression of prostaglandin (PG) E(2) synthesis and melanogenic stimulant receptors (neurotrophin, PGE(2) and melanocyte stimulating hormone expression).
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MESH Headings
- Animals
- Antineoplastic Agents, Phytogenic/pharmacology
- Antineoplastic Agents, Phytogenic/therapeutic use
- Cyclooxygenase 2/genetics
- Cyclooxygenase 2/metabolism
- Gene Expression/drug effects
- Guinea Pigs
- Male
- Melanins/antagonists & inhibitors
- Melanins/genetics
- Melanoma/prevention & control
- Mice
- Mice, Hairless
- Monophenol Monooxygenase/genetics
- Monophenol Monooxygenase/metabolism
- Phaeophyceae/chemistry
- Phytotherapy
- Plant Extracts/pharmacology
- Plant Extracts/therapeutic use
- RNA, Messenger/metabolism
- Receptor, Melanocortin, Type 1/genetics
- Receptor, Melanocortin, Type 1/metabolism
- Receptor, Nerve Growth Factor/genetics
- Receptor, Nerve Growth Factor/metabolism
- Receptors, Endothelin/genetics
- Receptors, Endothelin/metabolism
- Receptors, Prostaglandin E, EP1 Subtype/genetics
- Receptors, Prostaglandin E, EP1 Subtype/metabolism
- Reverse Transcriptase Polymerase Chain Reaction
- Skin/drug effects
- Skin/metabolism
- Skin/radiation effects
- Skin Pigmentation/drug effects
- Skin Pigmentation/radiation effects
- Ultraviolet Rays
- Xanthophylls/pharmacology
- Xanthophylls/therapeutic use
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Affiliation(s)
- Hiroshi Shimoda
- Research & Development Division, Oryza Oil & Fat Chemical Co. Ltd, Ichinomiya, Aichi 493-8001, Japan.
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Zhao ZK, Jiang ZM, Liu XZ, Chen YT, Jia WJ. [Study on reversion of malignant phenotype of glioma by siRNA targeting p75 neurotrophin receptor]. Zhonghua Bing Li Xue Za Zhi 2010; 39:400-404. [PMID: 21055158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To study the therapeutic efficacy of siRNA fragments silencing p75 neurotrophin receptor (p75(NTR)), which may be a key regulator of glioma cell apoptosis and invasion. METHODS The siRNA sequence fragments targeting p75(NTR) were designed and transferred into human glioma cell line U251. RT-PCR and immunocytochemistry method were used to explore the expression of p75(NTR) mRNA and protein. Cell adhesion assay was employed to detect cellular adhesion ability, and soft agar clone formation assay was adopted to identify oncogenicity, and a U251 glioma model was established in nude mice. The intracranial tumor volume was detected by MRI. The expression of p75(NTR), NGF and cyclin D2 were identified using immunohistochemistry. Cell apoptosis was detected by apoptosis kit in situ. RESULTS The siRNA fragments targeting p75(NTR) were capable of decreasing mRNA and protein expression of p75(NTR) in U251 glioma cell line. Both the cellular adhesion ability and oncogenicity were weakly relevant. The p75(NTR) expression level was negatively correlated with cyclin D2 and apoptosis, and positively correlated with NGF expression. The siRNA sequence fragments targeting p75(NTR) were effective in decreasing the gross volume of tumor; prolonged the survival time of mice, and the edge of tumor was much sharper than that of the control group. CONCLUSIONS The gene silencing technique by siRNA targeting p75(NTR) is capable of decreasing tumor invasion and cell proliferation as well as inducing cell apoptosis. It is expected to be a new choice for glioma gene therapy.
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Affiliation(s)
- Zhan-kao Zhao
- Department of Pathology, the Affiliated Hospital of the Medical College of Chinese People's Armed Police Force, Tianjin 300162, China
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Fujimaki H, Yamamoto S, Nakajima D, Goto S. The expression of nerve growth factor in mice lung following low-level toluene exposure. Toxicol Lett 2009; 191:240-5. [PMID: 19765639 DOI: 10.1016/j.toxlet.2009.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2009] [Revised: 09/08/2009] [Accepted: 09/08/2009] [Indexed: 11/17/2022]
Abstract
To clarify the effect of indoor air pollutants on nerve growth factor (NGF) production in lung, male C3H/HeN mice were exposed to filtered air (control) or toluene at levels of 0.9 ppm, 9 ppm, or 90 ppm for 30 min via nose-only inhalation on days 0, 1, 2, 7, 14, 21, 28, 35, 42, 49 and 56. As an allergic mouse model, some mice (n=24) were immunized with ovalbumin. Lungs from each mouse were collected to determine NGF and related receptor expressions using real-time reverse transcription polymerase chain reaction (RT-PCR) analysis. NGF and TrkA mRNAs were increased in the lungs of the immunized mice following exposure to 9 ppm toluene (n=6) (P<0.05 ppm vs. 0 ppm). Remarkably increased NGF-positive bronchiolus and alveolar epithelium cells were observed in 9 ppm toluene-exposed, immunized mice. To determine NGF mediating signaling, we also examined mRNA expression of neurotrophin receptor p75 (p75(NTR)) and oxidative stress marker, heme oxygenase (HO)-1 in the lung. There is no difference in the expressions of p75(NTR) and HO-1 between toluene-exposed and control mice. The expression of CCL2 and CCL3 mRNAs was significantly elevated in 9 ppm toluene-exposed, immunized mice. These findings suggest that the exposure with volatile organic compounds enhanced NGF expression and airway inflammation stronger in allergic individuals than in healthy individuals.
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Affiliation(s)
- Hidekazu Fujimaki
- National Institute for Environmental Studies, Tsukuba, Ibaraki, 305-8506, Japan.
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Johnston ALM, Lun X, Rahn JJ, Liacini A, Wang L, Hamilton MG, Parney IF, Hempstead BL, Robbins SM, Forsyth PA, Senger DL. The p75 neurotrophin receptor is a central regulator of glioma invasion. PLoS Biol 2008; 5:e212. [PMID: 17696644 PMCID: PMC1939884 DOI: 10.1371/journal.pbio.0050212] [Citation(s) in RCA: 133] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Accepted: 06/08/2007] [Indexed: 01/02/2023] Open
Abstract
The invasive nature of cancers in general, and malignant gliomas in particular, is a major clinical problem rendering tumors incurable by conventional therapies. Using a novel invasive glioma mouse model established by serial in vivo selection, we identified the p75 neurotrophin receptor (p75NTR) as a critical regulator of glioma invasion. Through a series of functional, biochemical, and clinical studies, we found that p75NTR dramatically enhanced migration and invasion of genetically distinct glioma and frequently exhibited robust expression in highly invasive glioblastoma patient specimens. Moreover, we found that p75NTR-mediated invasion was neurotrophin dependent, resulting in the activation of downstream pathways and producing striking cytoskeletal changes of the invading cells. These results provide the first evidence for p75NTR as a major contributor to the highly invasive nature of malignant gliomas and identify a novel therapeutic target. Gliomas are highly malignant and invasive tumors with tendrils that extend far from the primary tumor site, rendering conventional therapies ineffective and leading to an invariably poor prognosis. To understand the molecular mechanisms underlying this invasive behavior, we injected immunocompromised mice with human gliomas and compared invasive cells, which left the primary tumor site, to noninvasive cells, which remained at the site of injection. We identified the neurotrophin receptor p75NTR—which normally functions during development to induce neurite outgrowth and promote neuronal cell death—as an important regulator of glioma invasion. We present the first evidence that this neurotrophin receptor can also be a potent mediator of glioma invasion, and we show that the expression of this receptor is sufficient to impart a dramatic invasive behavior on genetically distinct tumors. These data highlight a previously unknown function of this receptor and suggest it may be a novel therapeutic target in the treatment of this devastating cancer. By in vivo selection of a human glioma, the authors identify the p75NTR neuotrophin receptor as a critical molecule regulating increased invasiveness.
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Affiliation(s)
- Angela L. M Johnston
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
| | - Xueqing Lun
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Jennifer J Rahn
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
| | - Abdelhamid Liacini
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Limei Wang
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Mark G Hamilton
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Ian F Parney
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
| | - Barbara L Hempstead
- Division of Hematology, Cornell University Medical College, New York, New York, United States of America
| | - Stephen M Robbins
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
| | - Peter A Forsyth
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Alberta, Canada
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada
- * To whom correspondence should be addressed. E-mail: (PAF); (DLS)
| | - Donna L Senger
- Southern Alberta Cancer Research Institute, Calgary, Alberta, Canada
- Clark H. Smith Integrative Brain Tumour Research Center, Calgary, Alberta, Canada
- Department of Oncology, University of Calgary, Calgary, Alberta, Canada
- * To whom correspondence should be addressed. E-mail: (PAF); (DLS)
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Giraud S, Lautrette C, Bessette B, Decourt C, Mathonnet M, Jauberteau MO. Modulation of Fas-induced apoptosis by p75 neurotrophin receptor in a human neuroblastoma cell line. Apoptosis 2008; 10:1271-83. [PMID: 16215672 DOI: 10.1007/s10495-005-2649-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Fas and p75 neurotrophin receptors (p75(NTR)) are death receptors that alone induce apoptosis of SH-SY5Y neuroblastoma cell line respectively by Fas ligand or brain-derived neurotrophic factor (BDNF, a p75(NTR) ligand). We report on the modulation of Fas-mediated apoptosis by concomitant p75(NTR) activation. The exposure to both ligands suppressed the apoptotic effect. A co-localisation of Fas and p75(NTR) receptors was evidenced by co-capping and immunoprecipitation assays. Moreover, a caspase-8 inhibitor suppressed the protective effect of the concomitant BDNF and Fas ligand stimulation, suggesting that p75(NTR) and Fas receptors could share common signalling pathways.
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Affiliation(s)
- S Giraud
- Laboratory of Immunology, EA 3842, University Hospital, 87042 Limoges, France
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Okumura T, Tsunoda S, Mori Y, Ito T, Kikuchi K, Wang TC, Yasumoto S, Shimada Y. The biological role of the low-affinity p75 neurotrophin receptor in esophageal squamous cell carcinoma. Clin Cancer Res 2007; 12:5096-103. [PMID: 16951226 DOI: 10.1158/1078-0432.ccr-05-2852] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
UNLABELLED In this study, we investigated the clinicopathologic significance of the low-affinity p75 neurotrophin receptor (p75NTR; which is expressed in the stem/progenitor cell fraction of normal esophageal epithelial cells) in 187 resected esophageal squamous cell carcinoma (ESCC) specimens and found that approximately 50% of ESCC expressed p75NTR. Our investigation using ESCC cell lines showed that p75NTR was intensely expressed in the cells with high colony-forming capacity but they were sensitive to cell death on inhibition of p75NTR expression with transient transfection of small interfering RNA (siRNA). These findings suggest that p75NTR is necessary for survival and maintenance of ESCC tumors, providing us with a potential target for novel therapies. PURPOSE p75NTR is expressed in a stem/progenitor cell fraction of human normal esophageal epithelial cells. In this study, we investigated the expression and biological role of p75NTR in ESCC. EXPERIMENTAL DESIGN The expression of p75NTR in 187 resected ESCC specimens was immunohistochemically investigated. The expression of p75NTR in 30 ESCC cell lines (KYSEs) was assessed by reverse transcription-PCR, immunocytochemistry, and flow cytometry. The p75NTR-bright and p75NTR-dim/negative cells were isolated from KYSE150 by magnetic beads and colony formation was investigated. The role of p75NTR in KYSEs was assessed by transient transfection of siRNA. RESULTS p75NTR was expressed in 92 of 187 (49.2%) tumors. In well-differentiated tumors, positive staining was apparent in the first one to two layers from infiltrative margin of the tumors where most of the cells were actively proliferating. In moderately differentiated tumors, p75NTR was expressed in wider range from the margin of the tumors whereas p75NTR was diffusely distributed in poorly differentiated tumors. p75NTR was expressed in all examined KYSEs and the mean proportion of the p75NTR-bright fraction was 30.1%. The size of p75NTR-positive colonies was larger than that of p75NTR-negative colonies derived from KYSE150 (P<0.0001). The purified p75NTR-bright cells formed p75NTR-positive large colonies more frequently than the p75NTR-dim/negative cells (P<0.0001). Down-regulation of p75NTR expression by siRNA resulted in marked growth inhibition with induction of apoptosis. CONCLUSIONS Our findings suggest that p75NTR is necessary for survival and maintenance of ESCC tumors, providing us with a potential target for novel therapies.
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Affiliation(s)
- Tomoyuki Okumura
- Department of Surgery and Surgical Basic Science, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Lin PY, Hinterneder JM, Rollor SR, Birren SJ. Non-cell-autonomous regulation of GABAergic neuron development by neurotrophins and the p75 receptor. J Neurosci 2007; 27:12787-96. [PMID: 18032650 PMCID: PMC6673298 DOI: 10.1523/jneurosci.3302-07.2007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2007] [Revised: 09/26/2007] [Accepted: 10/17/2007] [Indexed: 01/12/2023] Open
Abstract
Basal forebrain GABAergic and cholinergic circuits regulate the activity of cholinergic projections to the cortex and hippocampus. Because these projections influence cortical development and function, the development of basal forebrain excitatory and inhibitory neurons is critical for overall brain development. We show that the neurotransmitter phenotype of these neurons is developmentally regulated by neurotrophins and the p75 receptor. Neurotrophins (nerve growth factor and brain-derived neurotrophic factor) increased the number of both cholinergic and GABAergic neurons in neonatal basal forebrain neuron cultures from the region of the medial septum. However, the p75 receptor is required only for neurotrophin-dependent expansion of the GABAergic, not the cholinergic, population. Neurotrophin-induced GABAergic development can be rescued in p75-/- cultures by expression of a p75 rescue construct in neighboring cells or by treatment with medium collected from neurotrophin-treated wild-type cultures. Because p75 is not expressed in basal forebrain GABAergic neurons, this defines a new, non-cell-autonomous mechanism of p75 action in which ligand binding results in release of a soluble factor that modifies neurotrophin responses of nearby neurons. p75 is also required for the maintenance of basal forebrain GABAergic neurons in vivo, demonstrating that p75-mediated interactions between cholinergic and GABAergic neurons regulate the balance of excitatory and inhibitory components of basal forebrain circuits.
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Affiliation(s)
- Pao-Yen Lin
- Department of Biology, Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454, and
- Department of Psychiatry, Chang Gung Memorial Hospital–Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, County 831, Taiwan
| | - Jeanine M. Hinterneder
- Department of Biology, Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454, and
| | - Sarah R. Rollor
- Department of Biology, Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454, and
| | - Susan J. Birren
- Department of Biology, Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454, and
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Wiehe JM, Ponsaerts P, Rojewski MT, Homann JM, Greiner J, Kronawitter D, Schrezenmeier H, Hombach V, Wiesneth M, Zimmermann O, Torzewski J. mRNA-mediated gene delivery into human progenitor cells promotes highly efficient protein expression. J Cell Mol Med 2007; 11:521-30. [PMID: 17635643 PMCID: PMC3922358 DOI: 10.1111/j.1582-4934.2007.00038.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Gene transfer into human CD34+ haematopoietic progenitor cells (HPC) and multi-potent mesenchymal stromal cells (MSC) is an essential tool for numerous in vitro and in vivo applications including therapeutic strategies, such as tissue engineering and gene therapy. Virus based methods may be efficient, but bear risks like tumorigenesis and activation of immune responses. A safer alternative is non-viral gene transfer, which is considered to be less efficient and accomplished with high cell toxicity. The truncated low affinity nerve growth factor receptor (ÄLNGFR) is a marker gene approved for human in vivo application. Human CD34+ HPC and human MSC were transfected with in vitro-transcribed mRNA for ΔLNGFR using the method of nucleofection. Transfection efficiency and cell viability were compared to plasmid-based nucleofection. Protein expression was assessed using flow cytometry over a time period of 10 days. Nucleofection of CD34+ HPC and MSC with mRNA resulted in significantly higher transfection efficiencies compared to plasmid transfection. Cell differentiation assays were performed after selecting ΔLNGFR positive cells using a fluorescent activating cell sorter. Neither cell differentiation of MSC into chondrocytes, adipocytes and osteoblasts, nor differentiation of HPC into burst forming unit erythroid (BFU-E) colony forming unit-granulocyte, erythrocyte, macrophage and megakaryocyte (CFU-GEMM), and CFU-granulocyte-macrophage (GM) was reduced. mRNA based nucleofection is a powerful, highly efficient and non-toxic approach for transient labelling of human progenitor cells or, via transfection of selective proteins, for transient manipulation of stem cell function. It may be useful to transiently manipulate stem cell characteristics and thus combine principles of gene therapy and tissue engineering.
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Affiliation(s)
- Juliane M Wiehe
- Department of Internal Medicine II, University of Ulm, Ulm, Germany
- *Correspondence to: Jan TORZEWSKI, University of Ulm; Department of Internal Medicine, II-Cardiology, Robert Koch Str. 8, 89081 Ulm, Germany. Tel: + 49 731 500-45026; Fax: + 49 731 500-45005; E-mail:
| | - Peter Ponsaerts
- Laboratory of Experimental Hematology, Faculty of Medicine, University of Antwerp, Antwerp, Belgium
| | - Markus T Rojewski
- Institute for Transfusion Medicine, University of Ulm, and Institute for Clinical Transfusion Medicine and Immunogenetics Ulm, Ulm, Germany
| | - Joerg M Homann
- Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Jochen Greiner
- Department of Internal Medicine III, University of Ulm, Ulm, Germany
| | | | - Hubert Schrezenmeier
- Institute for Transfusion Medicine, University of Ulm, and Institute for Clinical Transfusion Medicine and Immunogenetics Ulm, Ulm, Germany
| | - Vinzenz Hombach
- Department of Internal Medicine II, University of Ulm, Ulm, Germany
| | - Markus Wiesneth
- Institute for Transfusion Medicine, University of Ulm, and Institute for Clinical Transfusion Medicine and Immunogenetics Ulm, Ulm, Germany
| | | | - Jan Torzewski
- Department of Internal Medicine II, University of Ulm, Ulm, Germany
- *Correspondence to: Jan TORZEWSKI, University of Ulm; Department of Internal Medicine, II-Cardiology, Robert Koch Str. 8, 89081 Ulm, Germany. Tel: + 49 731 500-45026; Fax: + 49 731 500-45005; E-mail:
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Tong YC, Cheng JT. Aldose reductase inhibitor ONO-2235 restores the alterations of bladder nerve growth factor and neurotrophin receptor p75 genetic expression in streptozotocin induced diabetic rats. J Urol 2007; 178:2203-7. [PMID: 17870109 DOI: 10.1016/j.juro.2007.06.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Indexed: 10/22/2022]
Abstract
PURPOSE We assessed the treatment effect of the aldose reductase inhibitor ONO-2235 (China Chemical and Pharmaceutical, Taipei, Taiwan) on diabetes associated alterations in bladder nerve growth factor and the nerve growth factor neurotrophin receptor p75 mRNA expressions using the streptozotocin (Sigma) induced diabetic rat model. MATERIALS AND METHODS Male Wistar rats were divided into 3 groups, including group 1--vehicle treated normal rats, group 2--vehicle treated 9-week streptozotocin diabetic rats and group 3--ONO-2235 treated 9-week streptozotocin diabetic rats. In vivo cystometry was performed using anesthesia. Bladder nerve growth factor levels were measured by enzyme linked immunosorbent assay. Expression of the mRNA encoding nerve growth factor and neurotrophin receptor p75 in the rat bladder was studied using reverse transcriptase-polymerase chain reaction. RESULTS Cystometry showed increased bladder capacity and decreased emptying function in diabetic rats. ONO-2235 treatment improved voiding volume, voiding fraction and residual volume. The nerve growth factor concentration in streptozotocin induced diabetic rat bladders was significantly lower than the control level in 8 experiments each (mean +/- SEM 45.78 +/- 4.36 and 96.44 +/- 8.73 pg/microg protein, respectively, p <0.01). The mRNA expression of bladder nerve growth factor and neurotrophin receptor p75 in diabetic rats was significantly decreased compared to that in controls in 8 experiments each (p <0.01 and <0.001, respectively). Treatment with ONO-2235 did not significantly change the blood sugar level in diabetic rats. However, administration of the drug significantly increased the bladder nerve growth factor concentration as well as nerve growth factor mRNA and neurotrophin receptor p75 mRNA expression to normal levels in 8 experiments each (p <0.01, <0.01 and <0.001, respectively). CONCLUSIONS ONO-2235 improved bladder emptying function and restored the decreased genetic expression of bladder nerve growth factor and neurotrophin receptor p75 in 9-week streptozotocin induced diabetic rats, indicating involvement of the sorbitol pathway in the genetic down-regulations of nerve growth factor and p75(NTR) during diabetic cystopathy.
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Affiliation(s)
- Yat-Ching Tong
- Departments of Urology and Pharmacology, School of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China.
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Diolaiti D, Bernardoni R, Trazzi S, Papa A, Porro A, Bono F, Herbert JM, Perini G, Della Valle G. Functional cooperation between TrkA and p75NTR accelerates neuronal differentiation by increased transcription of GAP-43 and p21(CIP/WAF) genes via ERK1/2 and AP-1 activities. Exp Cell Res 2007; 313:2980-92. [PMID: 17619016 DOI: 10.1016/j.yexcr.2007.06.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2007] [Revised: 05/22/2007] [Accepted: 06/07/2007] [Indexed: 11/28/2022]
Abstract
The biological complexity of NGF action is achieved by binding two distinct neurotrophin receptors, TrkA and p75(NTR). While several reports have provided lines of evidence on the interaction between TrkA and p75(NTR) at the plasma membrane, much fewer data are available on the consequence of such an interaction in terms of intracellular signaling. In this study, we have focused on how p75(NTR) may affect TrkA downstream signaling with respect to neuronal differentiation. Here, we have shown that cooperation between p75(NTR) and TrkA results in an increased NGF-mediated TrkA autophosphorylation, leads to a sustained activation of ERK1/2 and accelerates neurite outgrowth. Interestingly, neurite outgrowth is concomitant with a selective enhancement of the AP-1 activity and the transcriptional activation of genes such as GAP-43 and p21(CIP/WAF), known to be involved in the differentiation process. Collectively, our results unveil a functional link between the specific expression profile of neurotrophin receptors in neuronal cells and the NGF-mediated regulation of the differentiation process possibly through a persistent ERKs activation and the selective control of the AP-1 activity.
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Affiliation(s)
- Daniel Diolaiti
- Department of Biology, University of Bologna, Via Selmi 3, 40126 Bologna, Italy
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Jin H, Pan Y, Zhao L, Zhai H, Li X, Sun L, He L, Chen Y, Hong L, Du Y, Fan D. p75 neurotrophin receptor suppresses the proliferation of human gastric cancer cells. Neoplasia 2007; 9:471-8. [PMID: 17603629 PMCID: PMC1899251 DOI: 10.1593/neo.07175] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2007] [Revised: 02/06/2007] [Accepted: 03/21/2007] [Indexed: 12/23/2022] Open
Abstract
Identifying an effective therapeutic target is pivotal in the treatment of gastric cancer. In this study, we investigated the expression of p75 neurotrophin receptor (p75NTR) in gastric cancer and the impact of its alteration on tumor growth. p75NTR expression was absent or significantly decreased in 212 cases of gastric cancers compared with the normal gastric mucosa (P < .05). Moreover, p75NTR expression was also lost or significantly decreased in various human gastric cancer cell lines. p75NTR inhibited in vitro growth activities and caused dramatic attenuation of tumor growth in animal models by induction of cell cycle arrest. Upregulation of p75NTR led to downregulation of cyclin A, cyclin D1, cyclin E, cyclin-dependent kinase 2, p-Rb, and PCNA, but to upregulation of Rb and p27 expressions. Conversely, downregulating p75NTR with specific siRNA yielded inverse results. The rescue of tumor cells from cell cycle progression by a death domain-deleted dominant-negative antagonist of p75NTR (Deltap75NTR) showed that the death domain transduced antiproliferative activity in a ligand-independent manner and further demonstrated the inhibitive effect of p75NTR on growth in gastric cancer. Therefore, we provided evidence that p75NTR was a potential tumor suppressor and may be used as a therapeutic target for gastric cancer.
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Affiliation(s)
- Haifeng Jin
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
- Department of Gastroenterology, Bethune International Peace Hospital, Shijiazhuang, Hebei Province 050082, China
| | - Yanglin Pan
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Lina Zhao
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Huihong Zhai
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Xiaohua Li
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Li Sun
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Lijie He
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Yu Chen
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Liu Hong
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Yulei Du
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
| | - Daiming Fan
- State Key Laboratory of Cancer Biology and Institute of Digestive Diseases, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shaanxi Province 710032, China
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Li DY, Chen J, Shi J, Li JH, Yao YJ. [Expression of P75NTR protein and RhoA mRNA in the brain of neonatal rats with white matter damage]. Zhongguo Dang Dai Er Ke Za Zhi 2007; 9:317-20. [PMID: 17706029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
OBJECTIVE Recent studies have indicated that the signal pathway of NgR-P75NTR- RhoA plays a key role in nerve injury and remodeling, but its exact mechanism and the role of the downstream molecule RhoA regulated by P75NTR remain unclear in hypoxia-ischemia (HI) neonatal animals. The present study was designed to assess the expression of P75NTR protein and RhoA mRNA in neonatal white matter and to investigate their relationship in newborn rats with white matter damage (WMD). METHODS The rat WMD model was established by the ligation of right common carotid artery, followed by 6% hypoxia exposure for 4 hrs. The control group was sham-operated, without HI treatment. The histological changes of brain tissue were observed under light and electron microscopes. Expression of P75NTR protein and RhoA mRNA in the brain white matter after 12, 24, 48 and 72 hrs and 7 days of HI were detected by RT-PCR and immunohistochemistry, respectively. RESULTS Periventricular white matter damage was observed by 48 hrs of HI. Expression of P75NTR protein increased in the striatum and callosum zones at 12 hrs, peaked at 48 hrs, and remained at a higher level than control until 72 hrs of HI in the WMD group (P < 0.01). After 7 days of HI expression of P75NTR protein was no longer statistically different from controls. The RhoA mRNA was higher in the WMD group for the first 72 hrs and then declined to control values. CONCLUSIONS Increased P75NTR protein might mediate apoptosis of nerve cells and inhibit the regeneration of neuron axons. The subsequent decline back to control value may be correlated with the aggregation of necrosis of nerve cells after HI. The patterns of RhoA mRNA expression were consistent with those of P75NTR protein, suggesting that the increased P75NTR level may promote RhoA mRNA expression.
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Affiliation(s)
- De-Yuan Li
- Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu 610041, China
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Kidane AH, van Dooren SHJ, Roubos EW, Jenks BG. Expression and physiological regulation of BDNF receptors in the neuroendocrine melanotrope cell of Xenopus laevis. Gen Comp Endocrinol 2007; 153:176-81. [PMID: 17502112 DOI: 10.1016/j.ygcen.2007.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2006] [Revised: 03/28/2007] [Accepted: 04/01/2007] [Indexed: 12/13/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) and alpha-melanophore-stimulating hormone (alpha-MSH) are co-sequestered in secretory granules in melanotrope cells of the pituitary pars intermedia of the amphibian Xenopus laevis. alpha-MSH is responsible for pigment dispersion in dermal melanophores during the process of black-background adaptation. BDNF-production in melanotrope cells is increased by placing animals on a black background, and BDNF acts as an autocrine stimulatory factor on the melanotrope cells. However, the repertoire of possible neurotrophin receptors of the melanotrope is unknown. In this study we have established the expression of full length TrkB (TrkB.FL), truncated TrkB (TrkB.T) and p75(NTR) receptors in the Xenopus neurointermediate lobe by RT-PCR. In situ hybridization reveals the presence of TrkB.FL mRNA and p75(NTR) mRNA in melanotrope cells. Quantitative RT-PCR shows that in animals on a black background the amounts of TrkB.T and p75(NTR) mRNA are about three times higher than in white background-adapted animals. We suggest that the amount of p75(NTR) sets the sensitivity of the melanotrope cells for the stimulatory action of BDNF during physiological adaptation to background light intensity.
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Affiliation(s)
- Adhanet H Kidane
- Department of Cellular Animal Physiology, Integrative Physiology, EURON European Graduate School of Neuroscience, Radboud University Nijmegen, Toernooiveld 1, 6525 ED Nijmegen, The Netherlands
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Bhargava S. Role of nerve growth factor and its receptor in the morphogenesis of neural tube in early chick embryo. Gen Comp Endocrinol 2007; 153:141-6. [PMID: 17418844 DOI: 10.1016/j.ygcen.2007.02.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Revised: 02/22/2007] [Accepted: 02/24/2007] [Indexed: 12/11/2022]
Abstract
Expression of p75 nerve growth factor receptor (p75(NTR)) in the early neurogenesis of chick embryo showed that nerve growth factor receptor (NGFR) is localized in presumptive neuroectoblast and endoblast in the chick gastrula but not in the mesoblast. By stages 9, 10, and 11, NGFR positive cells were located distinctly in the region where the neural folds converge, meet and fuse. NGFR expression was also seen in developing notochord and somites, wherein the reaction was localized on the cell surfaces. Strong p75(NTR) reaction was seen on the roof of the neural tube where it detaches from the head ectoderm by stage 12. The study revealed that p75(NTR) is co-expressed with NGF in the same developmental stage(s) and in areas, where cell death occurs during neuronal development. Further, when the endogenous levels of NGF signaling were blocked by anti-NGF antibody, abnormalities were observed at the anterior end of the neural tube formation. As a result, embryos showed open neural tubes and a few were bent on one side of the body axis. In a small proportion of embryos, diffused somites were observed. The findings supports and confirms our previous study that NGF signaling plays a significant role in the shaping of neural tube in chick embryos through p75(NTR)-NGF receptor.
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Affiliation(s)
- Shobha Bhargava
- Molecular Embryology Laboratory, Department of Zoology, University of Pune, Pune 411 007, India.
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Young KM, Merson TD, Sotthibundhu A, Coulson EJ, Bartlett PF. p75 neurotrophin receptor expression defines a population of BDNF-responsive neurogenic precursor cells. J Neurosci 2007; 27:5146-55. [PMID: 17494700 PMCID: PMC6672366 DOI: 10.1523/jneurosci.0654-07.2007] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Although our understanding of adult neurogenesis has increased dramatically over the last decade, confusion still exists regarding both the identity of the stem cell responsible for neuron production and the mechanisms that regulate its activity. Here we show, using flow cytometry, that a small population of cells (0.3%) within the stem cell niche of the rat subventricular zone (SVZ) expresses the p75 neurotrophin receptor (p75(NTR)) and that these cells are responsible for neuron production in both newborn and adult animals. In the adult, the p75(NTR)-positive population contains all of the neurosphere-producing precursor cells, whereas in the newborn many of the precursor cells are p75(NTR) negative. However, at both ages, only the neurospheres derived from p75(NTR)-positive cells are neurogenic. We also show that neuron production from p75(NTR)-positive but not p75(NTR)-negative precursors is greatly enhanced after treatment with brain-derived neurotrophic factor (BDNF) or nerve growth factor. This effect appears to be mediated specifically by p75(NTR), because precursor cells from p75(NTR)-deficient mice show a 70% reduction in their neurogenic potential in vitro and fail to respond to BDNF treatment. Furthermore, adult p75(NTR)-deficient mice have significantly reduced numbers of PSA-NCAM (polysialylated neural cell adhesion molecule)-positive SVZ neuroblasts in vivo and a lower olfactory bulb weight. Thus, p75(NTR) defines a discrete population of highly proliferative SVZ precursor cells that are able to respond to neurotrophin activation by increasing neuroblast generation, making this pathway the most likely mechanism for the increased neurogenesis that accompanies raised BDNF levels in a variety of disease and behavioral situations.
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Affiliation(s)
- Kaylene M. Young
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Australia
- The Walter and Eliza Hall Institute for Medical Research, Melbourne VIC 3050, Australia, and
| | - Tobias D. Merson
- Howard Florey Institute, The University of Melbourne, Melbourne VIC 3010, Australia
| | - Areechun Sotthibundhu
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Australia
| | - Elizabeth J. Coulson
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Australia
| | - Perry F. Bartlett
- Queensland Brain Institute, The University of Queensland, Brisbane QLD 4072, Australia
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Abstract
PURPOSE The central and peripheral nervous systems are highly sensitive to ischemia and oxidative stress. We searched for markers of oxidative injury and examined neural density in the rabbit ischemic overactive bladder. MATERIALS AND METHODS Blood flow and oxygenation were recorded during cystometrogram in overactive and control rabbit bladders at weeks 8 and 16 after the induction of ischemia. Oxidative products and neural density were assessed by enzyme immunoassay and immunohistochemical staining, respectively. Reverse transcriptase-polymerase chain reaction was done to determine the gene expression of nerve growth factor and its receptor p75. The effect of acute oxidative stress was examined in tissue culture medium containing H(2)O(2). RESULTS Overactivity produced repeating cycles of ischemia/reperfusion and hypoxia/reoxygenation in the ischemic bladder, leading to oxidative and nitrosative products. Neural density in the 8-week ischemic bladder was similar to that in controls, while neurodegeneration was evident after 16 weeks of ischemia. Nerve growth factor gene levels initially increased at week 8 but significantly decreased at week 16 after the induction of ischemia. Gene levels of p75 decreased after 8 weeks and remained lower than in controls after 16 weeks of ischemia. Acute oxidative stress decreased nerve growth factor protein release in culture medium. The antioxidant enzyme catalase had no significant effect on control tissues but it partially protected nerve growth factor from H(2)O(2) injury. CONCLUSIONS Ischemia may have a role in bladder neuropathy. Overactivity under ischemic conditions produces noxious oxidative products in the bladder. Neurodegeneration in bladder ischemia may involve a lack of nutrients, hypoxia and overactivity induced free radicals. Nerve growth factor and its receptors may regulate neural reactions to oxidative injury.
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Affiliation(s)
- Kazem M Azadzoi
- Department of Urology, Veterans Affairs Boston Healthcare System, Boston, Massachusetts, USA.
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