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Alam S, Sargeant MS, Patel R, Jayaram P. Exploring Metabolic Mechanisms in Calcific Tendinopathy and Shoulder Arthrofibrosis: Insights and Therapeutic Implications. J Clin Med 2024; 13:6641. [PMID: 39597785 PMCID: PMC11595303 DOI: 10.3390/jcm13226641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2024] [Revised: 10/25/2024] [Accepted: 10/30/2024] [Indexed: 11/29/2024] Open
Abstract
Rotator cuff calcific tendinopathy and arthrofibrosis of the shoulder (adhesive capsulitis) are debilitating musculoskeletal disorders that significantly impact joint function and impair quality of life. Despite its high prevalence and common clinical presentation, the metabolic mechanisms underlying these conditions characterized by pain, and reduced mobility, remain poorly understood. This review aims to elucidate the role of metabolic processes implicated in the pathogenesis of calcific tendinopathy and shoulder arthrofibrosis. We will be focusing on the mechanistic role of how these processes contribute to disease progression and can direct potential therapeutic targets. Calcific tendinopathy is marked by aberrant calcium deposition within tendons, influenced by disrupted calcium and phosphate homeostasis, and altered cellular responses. Key molecular pathways, including bone morphogenetic proteins (BMPs), Wnt signaling, and transforming growth factor-beta (TGF-β), play crucial roles in the pathophysiology of calcification, calcium imbalance, and muscle fibrosis. In contrast, shoulder arthrofibrosis involves excessive collagen deposition and fibrosis within the shoulder joint capsule, driven by metabolic dysregulation and inflammation. The TGF-β signaling pathway and inflammatory cytokines, such as interleukin-6 (IL-6), are central to the fibrotic response. A comparative analysis reveals both shared and distinct metabolic pathways between these conditions, highlighting the interplay between inflammation, cellular metabolism, extracellular matrix remodeling, calcific deposition, and calcium migration to the glenohumeral joints, resulting in adhesive capsulitis, thereby providing insights into their pathophysiology. This review discusses current therapeutic approaches and their limitations, advocating for the development of targeted therapies that address specific metabolic dysregulations. Future therapeutic strategies focus on developing targeted interventions that address the underlying metabolic dysregulation, aiming to improve patient outcomes and advance clinical management. This review offers a comprehensive overview of the metabolic mechanisms involved in calcific tendinopathy and shoulder arthrofibrosis, providing a foundation for future research and therapeutic development.
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Affiliation(s)
| | | | | | - Prathap Jayaram
- Department of Orthopedics, Musculoskeletal Institute, School of Medicine, Emory University, Atlanta, GA 30329, USA (M.S.S.); (R.P.)
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Yadav MK, Ishida M, Gogoleva N, Liao CW, Salim FN, Kanai M, Kuno A, Hayashi T, Shahri ZJ, Kulathunga K, Samir O, Lyu W, Olivia O, Mbanefo EC, Takahashi S, Hamada M. MAFB in macrophages regulates cold-induced neuronal density in brown adipose tissue. Cell Rep 2024; 43:113978. [PMID: 38522069 DOI: 10.1016/j.celrep.2024.113978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Revised: 01/28/2024] [Accepted: 03/05/2024] [Indexed: 03/26/2024] Open
Abstract
Transcription factor MAFB regulates various homeostatic functions of macrophages. This study explores the role of MAFB in brown adipose tissue (BAT) thermogenesis using macrophage-specific Mafb-deficient (Mafbf/f::LysM-Cre) mice. We find that Mafb deficiency in macrophages reduces thermogenesis, energy expenditure, and sympathetic neuron (SN) density in BAT under cold conditions. This phenotype features a proinflammatory environment that is characterized by macrophage/granulocyte accumulation, increases in interleukin-6 (IL-6) production, and IL-6 trans-signaling, which lead to decreases in nerve growth factor (NGF) expression and reduction in SN density in BAT. We confirm MAFB regulation of IL-6 expression using luciferase readout driven by IL-6 promoter in RAW-264.7 macrophage cell lines. Immunohistochemistry shows clustered organization of NGF-producing cells in BAT, which are primarily TRPV1+ vascular smooth muscle cells, as additionally shown using single-cell RNA sequencing and RT-qPCR of the stromal vascular fraction. Treating Mafbf/f::LysM-Cre mice with anti-IL-6 receptor antibody rescues SN density, body temperature, and energy expenditure.
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Affiliation(s)
- Manoj Kumar Yadav
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba 305-8575, Japan; National Institutes of Health, Bethesda, MD 20892, USA
| | - Megumi Ishida
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Natalia Gogoleva
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Ching-Wei Liao
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Filiani Natalia Salim
- Centre for Medical Science and Technology and Healthcare Equity, Parahyangan Catholic University, Bandung 40141, Indonesia
| | - Maho Kanai
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Akihiro Kuno
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Takuto Hayashi
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Zeynab Javanfekr Shahri
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Kaushalya Kulathunga
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba 305-8575, Japan
| | - Omar Samir
- Department of Pathology, Faculty of Veterinary Medicine, Mansoura University, Mansoura 35516, Egypt; Department of Medicine, Harvard Medical School, Boston, MA 02115, USA; Jeff and Penny Vinik Center for Allergic Disease Research, Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Boston, MA 02115, USA
| | - Wenxin Lyu
- Ph.D. Program in Human Biology, School of Integrative and Global Majors, University of Tsukuba, Tsukuba 305-8575, Japan; Department of Immunology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Department of Immunology and Microbiology, LEO Foundation Skin Immunology Research Center, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Olivia Olivia
- Faculty of Medicine, Universitas Padjadjaran, Sumedang 45363, Indonesia
| | | | - Satoru Takahashi
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Laboratory Animal Resource Center (LARC), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Tsukuba 305-8575, Japan; Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba 305-8575, Japan.
| | - Michito Hamada
- Department of Anatomy and Embryology, Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan; Laboratory Animal Resource Center (LARC), Faculty of Medicine, University of Tsukuba, Tsukuba 305-8575, Japan.
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Zhang Y, Zhao X, Ge D, Huang Y, Yao Q. The impact and mechanism of nerve injury on bone metabolism. Biochem Biophys Res Commun 2024; 704:149699. [PMID: 38412668 DOI: 10.1016/j.bbrc.2024.149699] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 01/30/2024] [Accepted: 02/15/2024] [Indexed: 02/29/2024]
Abstract
With an increasing understanding of the mechanisms of fracture healing, it has been found that nerve injury plays a crucial role in the process, but the specific mechanism is yet to be completely revealed. To address this issue and provide novel insights for fracture treatment, we compiled this review. This review aims to study the impact of nerve injury on fracture healing, exploring the role of neurotrophic factors in the healing process. We first revisited the effects of the central nervous system (CNS) and the peripheral nervous system (PNS) on the skeletal system, and further explained the phenomenon of significantly accelerated fracture healing under nerve injury conditions. Then, from the perspective of neurotrophic factors, we delved into the physiological functions and mechanisms of neurotrophic factors, such as nerve growth factor (NGF), Neuropeptides (NPs), and Brain-derived neurotrophic factor (BDNF), in bone metabolism. These effects include direct actions on bone cells, improvement of local blood supply, regulation of bone growth factors, control of cellular signaling pathways, promotion of callus formation and bone regeneration, and synergistic or antagonistic effects with other endocrine factors, such as Sema3A and Transforming Growth Factor β (TGF-β). Finally, we discussed the treatments of fractures with nerve injuries and the future research directions in this review, suggesting that the relationship between nerve injury and fracture healing, as well as the role of nerve injury in other skeletal diseases.
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Affiliation(s)
- Yongqiang Zhang
- Department of Orthopedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China; Key Lab of Additive Manufacturing Technology, Institute of Digital Medicine, Nanjing Medical University, Nanjing, China; Research Center of Digital Medicine and 3D Printing Technology of Jiangsu Province, Nanjing, China
| | - Xiao Zhao
- Department of Orthopedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China; Key Lab of Additive Manufacturing Technology, Institute of Digital Medicine, Nanjing Medical University, Nanjing, China; Research Center of Digital Medicine and 3D Printing Technology of Jiangsu Province, Nanjing, China
| | - Dawei Ge
- Department of Orthopedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China; Key Lab of Additive Manufacturing Technology, Institute of Digital Medicine, Nanjing Medical University, Nanjing, China; Research Center of Digital Medicine and 3D Printing Technology of Jiangsu Province, Nanjing, China
| | - Yang Huang
- International Innovation Center for Forest Chemicals & Materials and Jiangsu Co-Innovation Center of Efficient Processing & Utilization of Forest Resources, Nanjing Forestry University, Nanjing, China
| | - Qingqiang Yao
- Department of Orthopedic Surgery, Institute of Digital Medicine, Nanjing First Hospital, Nanjing Medical University, Nanjing, China; Key Lab of Additive Manufacturing Technology, Institute of Digital Medicine, Nanjing Medical University, Nanjing, China; Research Center of Digital Medicine and 3D Printing Technology of Jiangsu Province, Nanjing, China.
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Xu ZH, Xiong CW, Miao KS, Yu ZT, Zhang JJ, Yu CL, Huang Y, Zhou XD. Adipokines regulate mesenchymal stem cell osteogenic differentiation. World J Stem Cells 2023; 15:502-513. [PMID: 37424950 PMCID: PMC10324509 DOI: 10.4252/wjsc.v15.i6.502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 02/26/2023] [Accepted: 04/24/2023] [Indexed: 06/26/2023] Open
Abstract
Mesenchymal stem cells (MSCs) can differentiate into various tissue cell types including bone, adipose, cartilage, and muscle. Among those, osteogenic differentiation of MSCs has been widely explored in many bone tissue engineering studies. Moreover, the conditions and methods of inducing osteogenic differentiation of MSCs are continuously advancing. Recently, with the gradual recognition of adipokines, the research on their involvement in different pathophysiological processes of the body is also deepening including lipid metabolism, inflammation, immune regulation, energy disorders, and bone homeostasis. At the same time, the role of adipokines in the osteogenic differentiation of MSCs has been gradually described more completely. Therefore, this paper reviewed the evidence of the role of adipokines in the osteogenic differentiation of MSCs, emphasizing bone formation and bone regeneration.
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Affiliation(s)
- Zhong-Hua Xu
- Department of Orthopedics, Jintan Hospital Affiliated to Jiangsu University, Changzhou 213200, Jiangsu Province, China
| | - Chen-Wei Xiong
- Department of Orthopedics, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Kai-Song Miao
- Department of Orthopedics, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Zhen-Tang Yu
- Department of Orthopedics, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Jun-Jie Zhang
- Department of Orthopedics, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Chang-Lin Yu
- Department of Orthopedics, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Yong Huang
- Department of Orthopedics, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
| | - Xin-Die Zhou
- Department of Orthopedics, The Affiliated Changzhou Second People’s Hospital of Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Changzhou Medical Center, Nanjing Medical University, Changzhou 213000, Jiangsu Province, China
- Department of Orthopedics, Gonghe County Hospital of Traditional Chinese Medicine, Hainan Tibetan Autonomous Prefecture 811800, Qinghai Province, China
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Genç D, Günaydın B, Sezgin S, Aladağ A, Tarhan EF. The Comparison of the Differentiation Potential of Periodontal Ligament and Dental Pulp Mesenchymal Stem Cells in the Inflammatory Synovium Microenvironment. CYPRUS JOURNAL OF MEDICAL SCIENCES 2022. [DOI: 10.4274/cjms.2022.2021-192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Fleury S, Schnitzer ME, Ledoux-Hutchinson L, Boukhatem I, Bélanger JC, Welman M, Busseuil D, Tardif JC, D’Antono B, Lordkipanidzé M. Clinical Correlates Identify ProBDNF and Thrombo-Inflammatory Markers as Key Predictors of Circulating p75NTR Extracellular Domain Levels in Older Adults. Front Aging Neurosci 2022; 14:821865. [PMID: 35264944 PMCID: PMC8899540 DOI: 10.3389/fnagi.2022.821865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Accepted: 01/31/2022] [Indexed: 11/13/2022] Open
Abstract
The p75NTR receptor binds all neurotrophins and is mostly known for its role in neuronal survival and apoptosis. Recently, the extracellular domain (ECD) of p75NTR has been reported in plasma, its levels being dysregulated in numerous neurological diseases. However, the factors associated with p75NTR ECD levels remain unknown. We investigated clinical correlates of plasma p75NTR ECD levels in older adults without clinically manifested neurological disorders. Circulating p75NTR levels were measured by enzyme-linked immunosorbent assay in plasma obtained from participants in the BEL-AGE cohort (n = 1,280). Determinants of plasma p75NTR ECD levels were explored using linear and non-linear statistical models. Plasma p75NTR ECD levels were higher in male participants; were positively correlated with circulating concentrations of pro-brain-derived neurotrophic factor, and inflammatory markers interleukin-6 and CD40 Ligand; and were negatively correlated with the platelet activation marker P-selectin. While most individuals had p75NTR levels ranging from 43 to 358 pg/ml, high p75NTR levels reaching up to 9,000 pg/ml were detectable in a subgroup representing 15% of the individuals studied. In this cohort of older adults without clinically manifested neurological disorders, there was no association between plasma p75NTR ECD levels and cognitive performance, as assessed by the Montreal Cognitive Assessment score. The physiological relevance of high p75NTR ECD levels in plasma warrants further investigation. Further research assessing the source of circulating p75NTR is needed for a deeper understanding of the direction of effect, and to investigate whether high p75NTR ECD levels are predictive biomarkers or consequences of neuropathology.
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Affiliation(s)
- Samuel Fleury
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
| | - Mireille E. Schnitzer
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
- Department of Social and Preventive Medicine, School of Public Health, Université de Montréal, Montreal, QC, Canada
| | | | - Imane Boukhatem
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
| | - Jean-Christophe Bélanger
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
| | - Mélanie Welman
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
| | - David Busseuil
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
| | - Jean-Claude Tardif
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
- Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
- Department of Medicine, Montreal Heart Institute, Montreal, QC, Canada
| | - Bianca D’Antono
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
- Department of Psychology, Faculty of Arts and Sciences, Université de Montréal, Montreal, QC, Canada
- *Correspondence: Bianca D’Antono,
| | - Marie Lordkipanidzé
- Research Centre, Montreal Heart Institute, Montreal, QC, Canada
- Faculty of Pharmacy, Université de Montréal, Montreal, QC, Canada
- Marie Lordkipanidzé,
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Sharma GP, Frei AC, Narayanan J, Gasperetti T, Veley D, Amjad A, Albano K, Fish BL, Himburg HA. Brain-derived neurotrophic factor promotes immune reconstitution following radiation injury via activation of bone marrow mesenchymal stem cells. PLoS One 2021; 16:e0259042. [PMID: 34695155 PMCID: PMC8544859 DOI: 10.1371/journal.pone.0259042] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 10/11/2021] [Indexed: 11/18/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) is a member of the nerve growth factor family which has been extensively studied for its roles in neural development, long-term memory, brain injury, and neurodegenerative diseases. BDNF signaling through tropomyosin receptor kinase B (TrkB) stimulates neuronal cell survival. For this reason, small molecule TrkB agonists are under pre-clinical develoment for the treatment of a range of neurodegenerative diseases and injuries. Our laboratory recently reported BDNF is secreted by pro-regenerative endothelial progenitor cells (EPCs) which support hematopoietic reconstitution following total body irradiation (TBI). Here we report BDNF-TrkB signaling plays a novel regenerative role in bone marrow and thymic regeneration following radiation injury. Exogenous administration of BDNF or TrkB agonist 7,8-dihydroxyflavone (7,8-DHF) following myelosuppressive radiation injury promoted faster recovery of mature blood cells and hematopoietic stem cells capable of multi-lineage reconstitution. BDNF promotes hematopoietic regeneration via activation of PDGFRα+ bone marrow mesenchymal stem cells (MSCs) which increase secretion of hematopoietic cytokines interleukin 6 (IL-6) and leukemia inhibitory factor (LIF) in response to TrkB activation. These data suggest pharmacologic activation of the BDNF pathway with either BDNF or 7,8-DHF may be beneficial for treatment of radiation or chemotherapy induced myelosuppression.
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Affiliation(s)
- Guru Prasad Sharma
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Anne C. Frei
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Jayashree Narayanan
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Tracy Gasperetti
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Dana Veley
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Asma Amjad
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Katherine Albano
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Brian L. Fish
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Heather A. Himburg
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
- Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
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Banavar SR, Rawal SY, Pulikkotil SJ, Daood U, Paterson IC, Davamani FA, Kajiya M, Kurihara H, Khoo SP, Tan EL. 3D Clumps/Extracellular Matrix Complexes of Periodontal Ligament Stem Cells Ameliorate the Attenuating Effects of LPS on Proliferation and Osteogenic Potential. J Pers Med 2021; 11:528. [PMID: 34207600 PMCID: PMC8227185 DOI: 10.3390/jpm11060528] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/24/2021] [Accepted: 05/24/2021] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND The effects of lipopolysaccharide (LPS) on cell proliferation and osteogenic potential (OP) of MSCs have been frequently studied. OBJECTIVE to compare the effects of LPS on periodontal-ligament-derived mesenchymal stem cells (PDLSCs) in monolayer and 3D culture. METHODS The PDLSCs were colorimetrically assessed for proliferation and osteogenic potential (OP) after LPS treatment. The 3D cells were manually prepared by scratching and allowing them to clump up. The clumps (C-MSCs) were treated with LPS and assessed for Adenosine triphosphate (ATP) and OP. Raman spectroscopy was used to analyze calcium salts, DNA, and proline/hydroxyproline. Multiplexed ELISA was performed to assess LPS induced local inflammation. RESULTS The proliferation of PDLSCs decreased with LPS. On Day 28, LPS-treated cells showed a reduction in their OP. C-MSCs with LPS did not show a decrease in ATP production. Principal bands identified in Raman analysis were the P-O bond at 960 cm-1 of the mineral component, 785 cm-1, and 855 cm-1 showing qualitative changes in OP, proliferation, and proline/hydroxyproline content, respectively. ELISA confirmed increased levels of IL-6 and IL-8 but with the absence of TNF-α and IL-1β secretion. CONCLUSIONS These observations demonstrate that C-MSCs are more resistant to the effects of LPS than cells in monolayer cell culture. Though LPS stimulation of C-MSCs creates an early pro-inflammatory milieu by secreting IL-6 and IL-8, PDLSCs possess inactivated TNF promoter and an ineffective caspase-1 activating process.
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Affiliation(s)
- Spoorthi Ravi Banavar
- Oral Diagnostic and Surgical Sciences, School of Dentistry, International Medical University, 126, Jalan Jalil Perkasa 19, Bukit Jalil, Kuala Lumpur 57000, Malaysia;
| | - Swati Yeshwant Rawal
- Department of Surgical Sciences, Marquette University, 1250 W. Wisconsin Ave, Milwaukee, WI 53233, USA;
| | - Shaju Jacob Pulikkotil
- Clinical Dentistry, School of Dentistry, International Medical University, 126, Jalan Jalil Perkasa 19, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (S.J.P.); (U.D.)
| | - Umer Daood
- Clinical Dentistry, School of Dentistry, International Medical University, 126, Jalan Jalil Perkasa 19, Bukit Jalil, Kuala Lumpur 57000, Malaysia; (S.J.P.); (U.D.)
| | - Ian C. Paterson
- Department of Oral Craniofacial Sciences, Faculty of Dentistry, University of Malaya, Kuala Lumpur 50603, Malaysia;
- Oral Cancer Research & Coordinating Centre, Faculty of Dentistry, University of Malaya, Jalan Profesor Diraja Ungku Aziz, Kuala Lumpur 50603, Malaysia
| | | | - Mikihito Kajiya
- Department of Periodontal Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima 734-8553, Japan;
| | - Hidemi Kurihara
- Dental Academy, 1-6-2 Higashiyanagi, Kudamatsu City 744-0017, Japan;
| | - Suan Phaik Khoo
- Oral Diagnostic and Surgical Sciences, School of Dentistry, International Medical University, 126, Jalan Jalil Perkasa 19, Bukit Jalil, Kuala Lumpur 57000, Malaysia;
| | - Eng Lai Tan
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia;
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Li WY, Jia H, Wang ZD, Zhai FG, Sun GD, Ma D, Liu GB, Li CM, Wang Y. Combinatory transplantation of mesenchymal stem cells with flavonoid small molecule in acellular nerve graft promotes sciatic nerve regeneration. J Tissue Eng 2020; 11:2041731420980136. [PMID: 34956585 PMCID: PMC8693221 DOI: 10.1177/2041731420980136] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 11/21/2020] [Indexed: 12/11/2022] Open
Abstract
Previous animal studies have demonstrated that the flavonoid small-molecule TrkB agonist, 7, 8-dihydroxyflavone (DHF), promotes axon regeneration in transected peripheral nerves. In the present study, we investigated the combined effects of 7, 8-DHF treatment and bone marrow-derived stem/stromal cells (BMSCs) engraftment into acellular nerve allografts (ANAs) and explore relevant mechanisms that may be involved. Our results show that TrkB and downstream ERK1/2 phosphorylation are increased upon 7, 8-DHF treatment compared to the negative control group. Also, 7, 8-DHF promotes proliferation, survival, and Schwann-like cell differentiation of BMSCs in vitro. While selective ERK1/2 inhibitor U0126 suppressed the effect of upregulation of ERK1/2 phosphorylation and decreased cell proliferation, survival, and Schwann-like cell differentiation partially induced by 7, 8-DHF. In vivo, 7, 8-DHF promotes survival of transplanted BMSCs and upregulates axonal growth and myelination in regenerating ANAs. 7, 8-DHF+BMSCs also improved motor endplate density of target musculature. These benefits were associated with increased motor functional recovery. 7, 8-DHF+BMSCs significantly upregulated TrkB and ERK1/2 phosphorylation expression in regenerating ANA, and increased TrkB expression in the lumbar spinal cord. The mechanism of 7, 8-DHF action may be related to its ability to upregulate TrkB signaling, and downstream activation of survival signaling molecules ERK1/2 in the regenerating ANAs and spinal cord and improved survival of transplanted BMSCs. This study provides novel foundational data connecting the benefits of 7, 8-DHF treatment in neural injury and repair to BMSCs biology and function and demonstrates a potential combination approach for the treatment of injured peripheral nerve via nerve graft transplant.
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Affiliation(s)
- Wen-yuan Li
- Institute of Neural Tissue Engineering, Mudanjiang College of Medicine, Mudanjiang, China
| | - Hua Jia
- Department of Anatomy, School of Basic Medical Sciences, Ningxia Medical University, Yinchuan, China
- Center for Reproductive Biology and Health, College of Agricultural Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Zhen-Dong Wang
- Department of Otorhinolaryngology, The Second Affiliated Hospital, Mudanjiang College of Medicine, Mudanjiang, China
| | - Feng-guo Zhai
- Department of Pharmacology, Mudanjiang College of Medicine, Mudanjiang, China
| | - Guang-da Sun
- Institute of Neural Tissue Engineering, Mudanjiang College of Medicine, Mudanjiang, China
| | - Duo Ma
- Institute of Neural Tissue Engineering, Mudanjiang College of Medicine, Mudanjiang, China
| | - Gui-Bo Liu
- Institute of Neural Tissue Engineering, Mudanjiang College of Medicine, Mudanjiang, China
| | - Chun-Mei Li
- Department of Basic Psychological, Mudanjiang College of Medicine, Mudanjiang, China
| | - Ying Wang
- Institute of Neural Tissue Engineering, Mudanjiang College of Medicine, Mudanjiang, China
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10
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Al-Hakami A, Alqhatani SQ, Shaik S, Jalfan SM, Dhammam MSA, Asiri W, Alkahtani AM, Devaraj A, Chandramoorthy HC. Cytokine physiognomies of MSCs from varied sources confirm the regenerative commitment post-coculture with activated neutrophils. J Cell Physiol 2020; 235:8691-8701. [PMID: 32385929 DOI: 10.1002/jcp.29713] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 03/09/2020] [Accepted: 03/31/2020] [Indexed: 12/18/2022]
Abstract
The interaction of mesenchymal stromal cells (MSCs) with paracrine signals and immunological cells, and their responses and regenerative commitment thereafter, is understudied. In the current investigation, we compared MSCs from the umbilical cord blood (UCB), dental pulp (DP), and liposuction material (LS) on their ability to respond to activated neutrophils. Cytokine profiling (interleukin-1α [IL-1α], IL-2, IL-4, IL-6, IL-8, tumor necrosis factor-α [TNF-α], interferon-γ [IFN-γ], transforming growth factor-β [TGF-β]), cellular proliferation and osteogenic differentiation patterns were assessed. The results showed largely comparable cytokine profiles with higher TNF-α and IFN-γ levels in LSMSCs owing to their mature cellular phenotype. The viability and proliferation between LS/DP/UCB MSCs were comparable in the coculture group, while direct activation of MSCs with lipopolysaccharide (LPS) showed comparable proliferation with significant cell death in UCB MSCs and slightly higher cell death in the other two types of MSC. Furthermore, when MSCs post-neutrophil exposure were induced for osteogenic differentiation, though all the MSCs devoid of the sources differentiated, we observed rapid and significant turnover of DPMSCs positive of osteogenic markers rather than LS and UCB MSCs. We further observed a significant turnover of IL-1α and TGF-β at mRNA and cytokine levels, indicating the commitment of MSCs to differentiate through interacting with immunological cells or bacterial products like neutrophils or LPS, respectively. Taken together, these results suggest that MSCs have more or less similar cytokine responses devoid of their anatomical niche. They readily switch over from the cytokine responsive cell phenotype at the immunological microenvironment to differentiate and regenerate tissue in response to cellular signals.
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Affiliation(s)
- Ahmed Al-Hakami
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Department of Microbiology and Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Saad Qaddah Alqhatani
- Department of Surgery, Plastic Surgery Division, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Sharaz Shaik
- Department of Prosthetic Dentistry, College of Dentistry, King Khalid University, Abha, Saudi Arabia
| | - Saaed Mohammed Jalfan
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | | | - Wejdan Asiri
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Abdullah Misfer Alkahtani
- Department of Microbiology and Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Anantharam Devaraj
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Department of Microbiology and Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Harish C Chandramoorthy
- Center for Stem Cell Research, College of Medicine, King Khalid University, Abha, Saudi Arabia.,Department of Microbiology and Clinical Parasitology, College of Medicine, King Khalid University, Abha, Saudi Arabia
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11
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Macrophage-derived neurotrophin-3 promotes heterotopic ossification in rats. J Transl Med 2020; 100:762-776. [PMID: 31896816 DOI: 10.1038/s41374-019-0367-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 12/07/2019] [Accepted: 12/14/2019] [Indexed: 12/26/2022] Open
Abstract
Heterotopic ossification (HO) is a debilitating condition that results from traumatic injuries or genetic diseases, for which the underlying mechanisms remain unclear. Recently, we have demonstrated the expression of neurotrophin-3 (NT-3) and its role in promoting HO formation via mediating endothelial-mesenchymal transition (EndMT) of vascular endothelial cells. The current study investigated the role of NT-3 on the surrounding mesenchymal cells and its potential origin throughout HO formation at injured Achilles tendons in rats. We used an Achilles tenotomy to induce HO formation in vivo and cultured primary tendon-derived stem cells (TDSCs) to investigate the underlying mechanisms mediating the osteogenesis in vitro. Furthermore, RAW264.7 cells were employed to identify the origin of NT-3. The mRNA levels of NGF, BDNF, NT-3, and NT-4 and their tyrosine protein kinase (Trk) receptors as well as p75 receptor were elevated at injury sites. NT-3 and TrkC showed the highest induction. Neutralization of the NT-3-induced effects by the pan-Trk inhibitor GNF5837 reduced the expression of bone/cartilage-related genes while injection of NT-3 promoted HO formation with elevated mRNA of bone/cartilage-related markers at injured sites. In vitro, NT-3 accelerated osteogenic differentiation and mineralization of TDSCs through activation of the ERK1/2 and PI3K/Akt signaling pathways. Moreover, the colocalization of NT-3 and macrophages, including M1 and M2 macrophages, was observed in injured sites throughout HO formation, and in vitro studies demonstrated that activated macrophages mediated the secretion of NT-3. In addition, an increasing concentration of serum or supernatant NT-3 was observed both in vivo and in vitro. Depletion of macrophages with clodronate-loaded liposomes reduced HO formation as well as secretion and mRNA expression of NT-3. Our study suggests that macrophage-derived NT-3 may promote HO formation and osteogenesis of TDSCs via the ERK1/2 and PI3K/Akt signaling pathways, which may provide new insights for the therapeutic directions of HO in the future.
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12
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Lim KT, Hexiu J, Patel DK, Kim J, Seonwoo H, Chung JH. Evaluation of the Osteogenic Potential of Stem Cells in the Presence of Growth Hormone under Magnetic Field Stimulation. ACS Biomater Sci Eng 2020; 6:4141-4154. [DOI: 10.1021/acsbiomaterials.0c00043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Ki-Taek Lim
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jin Hexiu
- School of Stomatology, Capital Medical University, Beijing 100050, China
| | - Dinesh K. Patel
- Department of Biosystems Engineering, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jangho Kim
- Department of Rural and Biosystems Engineering, Chonnam National University, Gwangju 500757, Republic of Korea
| | - Hoon Seonwoo
- Department of Industrial Machinery Engineering, Suncheon National University, Suncheon 57922, Republic of Korea
| | - Jong Hoon Chung
- Department of Biosystems & Biomaterials Science and Engineering, Seoul National University, Seoul 08826, Republic of Korea
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13
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Aerts-Kaya F, Ulum B, Mammadova A, Köse S, Aydin G, Korkusuz P, Uçkan-Çetinkaya D. Neurological Regulation of the Bone Marrow Niche. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2020; 1212:127-153. [PMID: 31342461 DOI: 10.1007/5584_2019_398] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The bone marrow (BM) hematopoietic niche is the microenvironment where in the adult hematopoietic stem and progenitor cells (HSPCs) are maintained and regulated. This regulation is tightly controlled through direct cell-cell interactions with mesenchymal stromal stem (MSCs) and reticular cells, adipocytes, osteoblasts and endothelial cells, through binding to extracellular matrix molecules and through signaling by cytokines and hematopoietic growth factors. These interactions provide a healthy environment and secure the maintenance of the HSPC pool, their proliferation, differentiation and migration. Recent studies have shown that innervation of the BM and interactions with the peripheral sympathetic neural system are important for maintenance of the hematopoietic niche, through direct interactions with HSCPs or via interactions with other cells of the HSPC microenvironment. Signaling through adrenergic receptors (ARs), opioid receptors (ORs), endocannabinoid receptors (CRs) on HSPCs and MSCs has been shown to play an important role in HSPC homeostasis and mobilization. In addition, a wide range of neuropeptides and neurotransmitters, such as Neuropeptide Y (NPY), Substance P (SP) and Tachykinins, as well as neurotrophins and neuropoietic growth factors have been shown to be involved in regulation of the hematopoietic niche. Here, a comprehensive overview is given of their role and interactions with important cells in the hematopoietic niche, including HSPCs and MSCs, and their effect on HSPC maintenance, regulation and mobilization.
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Affiliation(s)
- Fatima Aerts-Kaya
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey. .,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey.
| | - Baris Ulum
- Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey.,Faculty of Arts and Sciences, Department of Biological Sciences, Middle East Technical University, Ankara, Turkey
| | - Aynura Mammadova
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey
| | - Sevil Köse
- Faculty of Health Sciences, Department of Medical Biology, Atilim University, Ankara, Turkey
| | - Gözde Aydin
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey
| | - Petek Korkusuz
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Faculty of Medicine, Department of Histology and Embryology, Hacettepe University, Ankara, Turkey
| | - Duygu Uçkan-Çetinkaya
- Graduate School of Health Sciences, Department of Stem Cell Sciences, Hacettepe University, Ankara, Turkey.,Center for Stem Cell Research and Development, Hacettepe University, Ankara, Turkey
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14
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Alomari MA, Khalil H, Khabour OF, Alzoubi KH, Dersieh EH. Altered cardiovascular function is related to reduced BDNF in Parkinson's disease. Exp Aging Res 2018; 44:232-245. [PMID: 29558315 DOI: 10.1080/0361073x.2018.1449589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) has been linked to cardiovascular health and function, however, the exact role is yet to be understood. The current study examined the relationship of circulatory BDNF with vascular function in Parkinson's disease (PD). ELISA was used to determine plasma BDNF in PD patients and healthy control (CT). Additionally, forearm resting blood flow (RBf), vascular resistance (RVr), venous capacitance (RVc), and venous outflow (RVo) as well as post occlusion blood flow (OcBf), vascular resistance (OcVr), venous capacitance (OcVc), and venous outflow (OcVo) were obtained using strain-gauge plethysmography. Simple linear regression showed that being PD patient can predict (p < 0.05) 12.9% of BDNF, 16.8% of RVc, 15.0% of OcVc, and 13.6% of OcVo. Subsequent stepwise regression included BDNF, RVc, OcVc, and OcVo, showed that being PD patient predicted (p < 0.05) 58.0% of BDNF, 47.7% of OcVo, and 15.1% of OcVc. Another simple linear regression demonstrated that BDNF predicted (p < 0.05) 18.5% of OcBf, 22.0% of OcVr, and 24.1% of OcVc in PD. In a subsequent stepwise linear regression, BDNF explained 26% ofOcVr (p = 0.008) and 42% of OcVc (p = 0.002) in PD. The study showed that BDNF is reduced and related to altered vascular function in PD. The results suggest that BDNF might contribute to preserving and maybe improving vascular function in PD.
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Affiliation(s)
- Mahmoud A Alomari
- a Division of Physical Therapy, Department of Rehabilitation Sciences , Jordan University of Science and Technology , Irbid , Jordan
| | - Hanan Khalil
- b Department of Rehabilitation Sciences, Faculty of Applied Medical Sciences , Jordan University of Science and Technology , Irbid , Jordan
| | - Omar F Khabour
- c Department Medical Laboratory Science , Jordan University of Science and Technology , Irbid , Jordan
| | - Karem H Alzoubi
- d Department of Clinical Pharmacy , Jordan University of Science and Technology , Irbid , Jordan
| | - Esraa H Dersieh
- e Department of Biological Sciences , Jordan University of Science and Technology , Irbid , Jordan
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15
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Insights into inflammatory priming of mesenchymal stromal cells: functional biological impacts. Inflamm Res 2018; 67:467-477. [PMID: 29362849 DOI: 10.1007/s00011-018-1131-1] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 01/11/2018] [Accepted: 01/16/2018] [Indexed: 02/07/2023] Open
Abstract
Mesenchymal stromal cells (MSCs) are multipotent adult cells with relevant biological properties making them interesting tools for cell-based therapy. These cells have the ability to home to sites of injury and secrete bioactive factors as part of their therapeutic functions. However, depending on the local environment, diverse functions of MSCs can be modulated and thus can influence their therapeutic value. The specific cytokine milieu within the site of inflammation is vital in determining the fate and cell behaviors of MSCs. Indeed, inflammatory signals (called as inflammatory priming), may induce critical changes on the phenotype, multilineage potential, hematopoietic support and immunomodulatory capacity of MSCs. Thus, for appropriate clinical application of MSCs, it is important to well know and understand these effects. In summary, investigating MSC interactions with the inflammatory environment is necessary to empower the therapeutic value of MSCs.
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16
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Huang L, Liu S, Song T, Zhang W, Fan J, Liu Y. Blockade of interleukin 6 by rat anti-mouse interleukin 6 receptor antibody promotes fracture healing. BIOCHEMISTRY (MOSCOW) 2017; 82:1193-1199. [DOI: 10.1134/s0006297917100121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Nerve Growth Factor Expression and Its Receptors TrkA and p75NTR in Peri-Implantitis Lesions. IMPLANT DENT 2017; 25:373-9. [PMID: 27064695 DOI: 10.1097/id.0000000000000418] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Nerve growth factor (NGF) can, through its receptors TrkA and p75NTR, convey signals for cell survival or cell differentiation. These proteins are also involved in inflammation and in bone resorption. The aim of this study is to evaluate, for the first time, the expression of NGF and its receptors TrkA and p75NTR in peri-implantitis lesions. MATERIALS AND METHODS Fifteen biopsy specimens from patients with chronic peri-implantitis and 4 of healthy oral mucosa were immunostained with antibodies against NGF, TrkA, and p75NTR. The staining intensity and percentage of stained cells were semi-quantitatively evaluated and results were compared between the 2 groups. RESULTS In the peri-implant pocket epithelium and gingival epithelium, NGF and TrkA expressions were similar to the healthy oral mucosa, however, a decreased expression of p75NTR was observed. In all cases, more than 75% of the inflammatory cells stained positively for NGF and TrkA, and p75NTR was negatively expressed. CONCLUSION The intense expression of NGF and TrkA in the inflammatory cell infiltrate associated with decreased expression of p75NTR in both gingival and pocket epithelium suggests that these proteins may have a role in peri-implantitis lesions.
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18
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Su YW, Zhou XF, Foster BK, Grills BL, Xu J, Xian CJ. Roles of neurotrophins in skeletal tissue formation and healing. J Cell Physiol 2017; 233:2133-2145. [PMID: 28370021 DOI: 10.1002/jcp.25936] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Accepted: 03/27/2017] [Indexed: 12/21/2022]
Abstract
Neurotrophins and their receptors are key molecules that are known to be critical in regulating nervous system development and maintenance and have been recognized to be also involved in regulating tissue formation and healing in skeletal tissues. Studies have shown that neurotrophins and their receptors are widely expressed in skeletal tissues, implicated in chondrogenesis, osteoblastogenesis, and osteoclastogenesis, and are also involved in regulating tissue formation and healing events in skeletal tissue. Increased mRNA expression for neurotrophins NGF, BDNF, NT-3, and NT-4, and their Trk receptors has been observed in injured bone tissues, and NT-3 and its receptor, TrkC, have been identified to have the highest induction at the injury site in a drill-hole injury repair model in both bone and the growth plate. In addition, NT-3 has also recently been shown to be both an osteogenic and angiogenic factor, and this neurotrophin can also enhance expression of the key osteogenic factor, BMP-2, as well as the major angiogenic factor, VEGF, to promote bone formation, vascularization, and healing of the injury site. Further studies, however, are needed to investigate if different neurotrophins have differential roles in skeletal repair, and if NT-3 can be a potential target of intervention for promoting bone fracture healing.
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Affiliation(s)
- Yu-Wen Su
- Sansom Institute for Health Research and School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Xin-Fu Zhou
- Sansom Institute for Health Research and School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Bruce K Foster
- Department of Orthopaedic Surgery, Women's and Children's Hospital, North Adelaide, South Australia, Australia
| | - Brian L Grills
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Victoria, Australia
| | - Jiake Xu
- School of Biomedical Sciences, University of Western Australia, Nedlands, Western Australia, Australia
| | - Cory J Xian
- Sansom Institute for Health Research and School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, South Australia, Australia
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19
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Minnone G, De Benedetti F, Bracci-Laudiero L. NGF and Its Receptors in the Regulation of Inflammatory Response. Int J Mol Sci 2017; 18:1028. [PMID: 28492466 PMCID: PMC5454940 DOI: 10.3390/ijms18051028] [Citation(s) in RCA: 219] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 03/31/2017] [Accepted: 05/03/2017] [Indexed: 12/28/2022] Open
Abstract
There is growing interest in the complex relationship between the nervous and immune systems and how its alteration can affect homeostasis and result in the development of inflammatory diseases. A key mediator in cross-talk between the two systems is nerve growth factor (NGF), which can influence both neuronal cell function and immune cell activity. The up-regulation of NGF described in inflamed tissues of many diseases can regulate innervation and neuronal activity of peripheral neurons, inducing the release of immune-active neuropeptides and neurotransmitters, but can also directly influence innate and adaptive immune responses. Expression of the NGF receptors tropomyosin receptor kinase A (TrkA) and p75 neurotrophin receptor (p75NTR) is dynamically regulated in immune cells, suggesting a varying requirement for NGF depending on their state of differentiation and functional activity. NGF has a variety of effects that can be either pro-inflammatory or anti-inflammatory. This apparent contradiction can be explained by considering NGF as part of an endogenous mechanism that, while activating immune responses, also activates pathways necessary to dampen the inflammatory response and limit tissue damage. Decreases in TrkA expression, such as that recently demonstrated in immune cells of arthritis patients, might prevent the activation by NGF of regulatory feed-back mechanisms, thus contributing to the development and maintenance of chronic inflammation.
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Affiliation(s)
- Gaetana Minnone
- Division of Rheumatology and Immuno-Rheumatology Research Laboratories, Bambino Gesù Children's Hospital, 00146 Rome, Italy.
| | - Fabrizio De Benedetti
- Division of Rheumatology and Immuno-Rheumatology Research Laboratories, Bambino Gesù Children's Hospital, 00146 Rome, Italy.
| | - Luisa Bracci-Laudiero
- Division of Rheumatology and Immuno-Rheumatology Research Laboratories, Bambino Gesù Children's Hospital, 00146 Rome, Italy.
- Institute of Translational Pharmacology, Consiglio Nazionale delle Ricerche (CNR), 00133 Rome, Italy.
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20
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Heberlein A, Schuster R, Kleimann A, Groh A, Kordon A, Opfermann B, Lichtinghagen R, Gröschl M, Kornhuber J, Bleich S, Frieling H, Hillemacher T. Joint Effects of the Epigenetic Alteration of Neurotrophins and Cytokine Signaling: A Possible Exploratory Model of Affective Symptoms in Alcohol-Dependent Patients? Alcohol Alcohol 2017; 52:277-281. [PMID: 28430931 DOI: 10.1093/alcalc/agw100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Accepted: 12/13/2016] [Indexed: 02/06/2023] Open
Abstract
AIMS Neurotrophins have been linked to the symptomatology of alcohol dependence. We aimed to investigate a possible association between the methylation of the promoters of both neurotrophins, the serum levels of the cytokines and core symptoms of alcohol dependence as withdrawal severity and anxiety. METHODS In this study we investigated a possible association between alterations in the methylation of the BDNF IV/NGF I gene promoter and the cytokines tumor necrosis factor α (TNF-α) and interleukin-6 (IL-6) in 55 male alcohol-dependent patients. RESULTS Mean methylation of the promoter of the BDNF gene was significantly associated with the TNF-α serum levels and the CIWA-score during withdrawal (P < 0.001). Moreover, mean methylation of the NGF I promoter was significantly associated with the IL-6 serum levels and STAI-I score during withdrawal (P < 0.001). CONCLUSION Our results suggest an association between the epigenetic regulation of both neurotrophins, BDNF and NGF, cytokine release and the symptomatology of alcohol dependence. They imply that changes in the methylation of neurotrophins may contribute to the symptomatology of alcohol dependence by affecting relevant downstream signaling cascades.
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Affiliation(s)
- Annemarie Heberlein
- Department of Psychiatry, Social Psychiatry and Psychotherapy, Medical School Hanover, Carl-Neuberg-Str. 1, 30625 Hannover, Center for Addiction Research (CARe), Germany
| | - Rilana Schuster
- Central Institute of Mental Health, University Mannheim/Heidelberg, Mannheim,Deutschland
| | - Alexandra Kleimann
- Department of Psychiatry, Social Psychiatry and Psychotherapy, Medical School Hanover, Carl-Neuberg-Str. 1, 30625 Hannover, Center for Addiction Research (CARe), Germany
| | - Adrian Groh
- Department of Psychiatry, Social Psychiatry and Psychotherapy, Medical School Hanover, Carl-Neuberg-Str. 1, 30625 Hannover, Center for Addiction Research (CARe), Germany
| | - Andreas Kordon
- Oberbergklinik, Oberberg 1, 78132 Hornberg, Germany
- Department of Psychiatry and Psychotherapy, Albert-Ludwigs-University of Freiburg, Fahnenbergplatz, 79085 Freiburg im Breisgau, Germany
| | - Birgitt Opfermann
- Medical Service of the Health Funds of Lower Saxony, Hildesheimer Str. 202, 30519 Hannover, Germany
| | - Ralf Lichtinghagen
- Institute of Clinical Chemistry, Medical School Hanover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
| | - Michael Gröschl
- Bioanalytical Laboratory, Celerion Switzerland AG, Allmendstr. 32, 8320 Fehraltorf, Switzerland
| | - Johannes Kornhuber
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-University of Erlangen-Nuremberg, Schwabachanlage 6-10, 91052 Erlangen, Germany
| | - Stefan Bleich
- Department of Psychiatry, Social Psychiatry and Psychotherapy, Medical School Hanover, Carl-Neuberg-Str. 1, 30625 Hannover, Center for Addiction Research (CARe), Germany
| | - Helge Frieling
- Department of Psychiatry, Social Psychiatry and Psychotherapy, Medical School Hanover, Carl-Neuberg-Str. 1, 30625 Hannover, Center for Addiction Research (CARe), Germany
| | - Thomas Hillemacher
- Department of Psychiatry, Social Psychiatry and Psychotherapy, Medical School Hanover, Carl-Neuberg-Str. 1, 30625 Hannover, Center for Addiction Research (CARe), Germany
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21
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Dudli S, Sing DC, Hu SS, Berven SH, Burch S, Deviren V, Cheng I, Tay BKB, Alamin TF, Ith MAM, Pietras EM, Lotz JC. ISSLS PRIZE IN BASIC SCIENCE 2017: Intervertebral disc/bone marrow cross-talk with Modic changes. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2017; 26:1362-1373. [PMID: 28138783 PMCID: PMC5409869 DOI: 10.1007/s00586-017-4955-4] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2017] [Accepted: 01/15/2017] [Indexed: 12/18/2022]
Abstract
STUDY DESIGN Cross-sectional cohort analysis of patients with Modic Changes (MC). OBJECTIVE Our goal was to characterize the molecular and cellular features of MC bone marrow and adjacent discs. We hypothesized that MC associate with biologic cross-talk between discs and bone marrow, the presence of which may have both diagnostic and therapeutic implications. BACKGROUND DATA MC are vertebral bone marrow lesions that can be a diagnostic indicator for discogenic low back pain. Yet, the pathobiology of MC is largely unknown. METHODS Patients with Modic type 1 or 2 changes (MC1, MC2) undergoing at least 2-level lumbar interbody fusion with one surgical level having MC and one without MC (control level). Two discs (MC, control) and two bone marrow aspirates (MC, control) were collected per patient. Marrow cellularity was analyzed using flow cytometry. Myelopoietic differentiation potential of bone marrow cells was quantified to gauge marrow function, as was the relative gene expression profiles of the marrow and disc cells. Disc/bone marrow cross-talk was assessed by comparing MC disc/bone marrow features relative to unaffected levels. RESULTS Thirteen MC1 and eleven MC2 patients were included. We observed pro-osteoclastic changes in MC2 discs, an inflammatory dysmyelopoiesis with fibrogenic changes in MC1 and MC2 marrow, and up-regulation of neurotrophic receptors in MC1 and MC2 bone marrow and discs. CONCLUSION Our data reveal a fibrogenic and pro-inflammatory cross-talk between MC bone marrow and adjacent discs. This provides insight into the pain generator at MC levels and informs novel therapeutic targets for treatment of MC-associated LBP.
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Affiliation(s)
- Stefan Dudli
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA.
| | - David C Sing
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA
| | - Serena S Hu
- Stanford Spine Clinic, Stanford University Medical Center, Stanford, USA
| | - Sigurd H Berven
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA
| | - Shane Burch
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA
| | - Vedat Deviren
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA
| | - Ivan Cheng
- Stanford Spine Clinic, Stanford University Medical Center, Stanford, USA
| | - Bobby K B Tay
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA
| | - Todd F Alamin
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA
| | | | - Eric M Pietras
- Division of Hematology, University of Colorado Denver, Denver, USA
| | - Jeffrey C Lotz
- Department of Orthopaedic Surgery, University of California San Francisco, 513 Parnassus Ave, S-1164, San Francisco, CA, 94143, USA
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22
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Takeda K, Tokunaga N, Aida Y, Kajiya M, Ouhara K, Sasaki S, Mizuno N, Fujita T, Kurihara H. Brain-Derived Neurotrophic Factor Inhibits Peptidoglycan-Induced Inflammatory Cytokine Expression in Human Dental Pulp Cells. Inflammation 2017; 40:240-247. [PMID: 27853893 DOI: 10.1007/s10753-016-0474-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The aim of this study was to examine the anti-inflammatory effect of brain-derived neurotrophic factor (BDNF) on human dental pulp cells (HDPCs) and identify the intracellular signaling pathway involved. We investigated the effect of BDNF (50 ng/ml) on interleukin (IL)-6 and IL-8 expression in peptidoglycan (PGN)-treated HDPCs. An inhibition assay was performed with MAPK or NF-κB inhibitors to determine the possible signaling pathway. IL-6 and IL-8 mRNA, IL-6 and IL-8 protein, and phosphorylated p38 kinase activity were determined using real-time PCR, ELISA, and Western blot analysis, respectively. BDNF significantly attenuated PGN-induced IL-6 and IL-8 mRNA and protein levels in HDPCs. A p38 inhibitor also inhibited IL-6 and IL-8 mRNA transcription. PGN stimulated phosphorylated p38 kinase activity in HDPCs, which was inhibited by BDNF. Suppression of phosphorylated p38 kinase activity by BDNF in HDPCs inhibited increased IL-6 and IL-8 expression induced by PGN. Our findings suggest that BDNF regulates intracellular signaling molecule activities to exert its anti-inflammatory effect.
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Affiliation(s)
- Katsuhiro Takeda
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
| | - Naoko Tokunaga
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Yusuke Aida
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Mikihito Kajiya
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Kazuhisa Ouhara
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Shinya Sasaki
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Noriyoshi Mizuno
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Tsuyoshi Fujita
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
| | - Hidemi Kurihara
- Department of Periodontal Medicine, Division of Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan
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23
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Kue CS, Kamkaew A, Voon SH, Kiew LV, Chung LY, Burgess K, Lee HB. Tropomyosin Receptor Kinase C Targeted Delivery of a Peptidomimetic Ligand-Photosensitizer Conjugate Induces Antitumor Immune Responses Following Photodynamic Therapy. Sci Rep 2016; 6:37209. [PMID: 27853305 PMCID: PMC5112560 DOI: 10.1038/srep37209] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 10/26/2016] [Indexed: 12/24/2022] Open
Abstract
Tropomyosin receptor kinase C (TrkC) targeted ligand-photosensitizer construct, IYIY-diiodo-boron-dipyrromethene (IYIY-I2-BODIPY) and its scrambled counterpart YIYI-I2-BODIPY have been prepared. IYIY-I2-BODIPY binds TrkC similar to neurotrophin-3 (NT-3), and NT-3 has been reported to modulate immune responses. Moreover, it could be shown that photodynamic therapy (PDT) elevates antitumor immune responses. This prompted us to investigate the immunological impacts mediated by IYIY-I2-BODIPY in pre- and post-PDT conditions. We demonstrated that IYIY-I2-BODIPY (strong response) and YIYI-I2-BODIPY (weak response) at 10 mg/kg, but not I2-BODIPY control, increased the levels of IL-2, IL-4, IL-6 and IL-17, but decreased the levels of systemic immunoregulatory mediators TGF-β, myeloid-derived suppressor cells and regulatory T-cells. Only IYIY-I2-BODIPY enhanced the IFN-γ+ and IL-17+ T-lymphocytes, and delayed tumor growth (~20% smaller size) in mice when administrated daily for 5 days. All those effects were observed without irradiation; when irradiated (520 nm, 100 J/cm2, 160 mW/cm2) to produce PDT effects (drug-light interval 1 h), IYIY-I2-BODIPY induced stronger responses. Moreover, photoirradiated IYIY-I2-BODIPY treated mice had high levels of effector T-cells compared to controls. Adoptive transfer of immune cells from IYIY-I2-BODIPY-treated survivor mice that were photoirradiated gave significantly delayed tumor growth (~40–50% smaller size) in recipient mice. IYIY-I2-BODIPY alone and in combination with PDT modulates the immune response in such a way that tumor growth is suppressed. Unlike immunosuppressive conventional chemotherapy, IYIY-I2-BODIPY can act as an immune-stimulatory chemotherapeutic agent with potential applications in clinical cancer treatment.
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Affiliation(s)
- Chin Siang Kue
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Anyanee Kamkaew
- Department of Chemistry, Texas A &M University, Box 30012, College Station, Texas 77842, United States
| | - Siew Hui Voon
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Lik Voon Kiew
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Lip Yong Chung
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kevin Burgess
- Department of Chemistry, Texas A &M University, Box 30012, College Station, Texas 77842, United States
| | - Hong Boon Lee
- Department of Pharmacy, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia
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24
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Lin JYS, Wu CL, Liao CN, Higuchi A, Ling QD. Chemogenomic analysis of neuronal differentiation with pathway changes in PC12 cells. MOLECULAR BIOSYSTEMS 2016; 12:283-94. [PMID: 26595144 DOI: 10.1039/c5mb00338e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway database creates networks from interrelations between molecular biology and underlying chemical elements. This allows for analysis of biologic networks, genomic information, and higher-order functional information at a system level. Through high throughput experiments and system biology analysis, we investigated the genes and pathways associated with NGF induced neuronal differentiation. We performed microarray experiments and used the KEGG database, system biology analysis, and annotation of pathway functions to study NGF-induced differentiation in PC12 cells. We identified 2020 NGF-induced genes with altered expressions over time. Cross-matching with the KEGG database revealed 830 genes; among which, 395 altered genes were found to have a 2-fold increase in gene expression over a two-hour period. We then identified 191 associated biologic pathways in the KEGG database; the top 15 pathways showed correlation with neural differentiation. These included the neurotrophin pathways, mitogen-activated protein kinase (MAPK) pathways, genes associated with axonal guidance and the Wnt pathways. The activation of these pathways synchronized with nerve growth factor (NGF)-induced differentiation in PC12 cells. In summary, we have established a model system that allows one to systematically characterize the functional pathway changes in a group of neuronal population after an external stimulus.
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Affiliation(s)
- Jack Yu-Shih Lin
- Graduate Institute of Systems Biology and Bioinformatics, National Central University, Chungli, Taiwan, Republic of China. and Taipei Medical University Municipal Wan-Fang Hospital, Taipei, Taiwan, Republic of China
| | - Chien Liang Wu
- Taipei Medical University Municipal Wan-Fang Hospital, Taipei, Taiwan, Republic of China
| | - Chia Nan Liao
- Graduate Institute of Systems Biology and Bioinformatics, National Central University, Chungli, Taiwan, Republic of China.
| | - Akon Higuchi
- Department of Chemical & Materials Engineering, National Central University, Chungli, Taiwan, Republic of China and Department of Botany and Microbiology, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Qing-Dong Ling
- Graduate Institute of Systems Biology and Bioinformatics, National Central University, Chungli, Taiwan, Republic of China. and Cathay Medical Research Institute, Cathay General Hospital, No. 32, Ln 160, Jian-Cheng Road, Shi-Zhi, Taipei, Taiwan, Republic of China.
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25
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Cytokines TNF-α, IL-6, IL-17F, and IL-4 Differentially Affect Osteogenic Differentiation of Human Adipose Stem Cells. Stem Cells Int 2016; 2016:1318256. [PMID: 27667999 PMCID: PMC5030432 DOI: 10.1155/2016/1318256] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 08/09/2016] [Accepted: 08/16/2016] [Indexed: 12/16/2022] Open
Abstract
During the initial stages of bone repair, proinflammatory cytokines are released within the injury site, quickly followed by a shift to anti-inflammatory cytokines. The effect of pro- and anti-inflammatory cytokines on osteogenic differentiation of mesenchymal stem cells is controversial. Here, we investigated the effect of the proinflammatory cytokines TNF-α, IL-6, IL-8, and IL-17F and the anti-inflammatory cytokine IL-4 on proliferation and osteogenic differentiation of human adipose stem cells (hASCs). hASCs were treated with TNF-α, IL-6, IL-8, IL-17F, or IL-4 (10 ng/mL) for 72 h mimicking bone repair. TNF-α reduced collagen type I gene expression but increased hASC proliferation and ALP activity. IL-6 also strongly enhanced ALP activity (18-fold), as well as bone nodule formation by hASCs. IL-8 did not affect proliferation or osteogenic gene expression but reduced bone nodule formation. IL-17F decreased hASC proliferation but enhanced ALP activity. IL-4 enhanced osteocalcin gene expression and ALP activity but reduced RUNX2 gene expression and bone nodule formation. In conclusion, all cytokines studied have both enhancing and reducing effects on osteogenic differentiation of hASCs, even when applied for 72 h only. Some cytokines, specifically IL-6, may be suitable to induce osteogenic differentiation of mesenchymal stem cells as a strategy for enhancing bone repair.
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26
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Pirzad Jahromi G, Shabanzadeh Pirsaraei A, Sadr SS, Kaka G, Jafari M, Seidi S, Charish J. Multipotent bone marrow stromal cell therapy promotes endogenous cell proliferation following ischemic stroke. Clin Exp Pharmacol Physiol 2016. [PMID: 26218989 DOI: 10.1111/1440-1681.12466] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Despite extensive research over the years, there still exists some debate as to what constitutes the optimal therapeutic strategy to promote recovery following stroke. Due to the complexity of injured brain pathophysiology, treatment approaches should ideally address numerous factors, ultimately aiming to promote tissue protection, axonal regrowth and functional recovery. This study extends the understanding of the effects of bone marrow stromal cell (BMSC) treatment following experimentally induced ischemic stroke in rats. Focal ischemic brain injury was experimentally induced in rats by placing a preformed clot into the middle cerebral artery. Animals were injected intravenously with BMSCs at 24 h after stroke and were killed 7 days post injury. When administered BMSCs following stroke, the neurological outcome was significantly improved relative to controls. There was an increase in the number of BMSCs labelled with BrdU present in the injured hemisphere of the brain compared to the non-injured side. Furthermore, administration of BMSCs also led to increases in astrocytosis, vascularization and endogenous proliferation. These findings provide insight into the mechanisms of action of BMSC treatment and further argue for the therapeutic potential of BMSCs as an effective treatment following cerebral stroke.
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Affiliation(s)
- Gila Pirzad Jahromi
- Neuroscience Research Centre, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Alireza Shabanzadeh Pirsaraei
- Electrophysiology Research Centre, Neuroscience Institute, Tehran, Iran.,Department of Physiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Genetics and Development Division, Toronto Western Research Institute, Toronto, ON, Canada
| | - Seyed Shahabeddin Sadr
- Electrophysiology Research Centre, Neuroscience Institute, Tehran, Iran.,Department of Physiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Golamreza Kaka
- Neuroscience Research Centre, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mahvash Jafari
- Department of Biochemistry, Faculty of Medicine, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Sadegh Seidi
- Department of Physiology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Jason Charish
- Genetics and Development Division, Toronto Western Research Institute, Toronto, ON, Canada
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27
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Viti F, Landini M, Mezzelani A, Petecchia L, Milanesi L, Scaglione S. Osteogenic Differentiation of MSC through Calcium Signaling Activation: Transcriptomics and Functional Analysis. PLoS One 2016; 11:e0148173. [PMID: 26828589 PMCID: PMC4734718 DOI: 10.1371/journal.pone.0148173] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Accepted: 01/13/2016] [Indexed: 12/17/2022] Open
Abstract
The culture of progenitor mesenchymal stem cells (MSC) onto osteoconductive materials to induce a proper osteogenic differentiation and mineralized matrix regeneration represents a promising and widely diffused experimental approach for tissue-engineering (TE) applications in orthopaedics. Among modern biomaterials, calcium phosphates represent the best bone substitutes, due to their chemical features emulating the mineral phase of bone tissue. Although many studies on stem cells differentiation mechanisms have been performed involving calcium-based scaffolds, results often focus on highlighting production of in vitro bone matrix markers and in vivo tissue ingrowth, while information related to the biomolecular mechanisms involved in the early cellular calcium-mediated differentiation is not well elucidated yet. Genetic programs for osteogenesis have been just partially deciphered, and the description of the different molecules and pathways operative in these differentiations is far from complete, as well as the activity of calcium in this process. The present work aims to shed light on the involvement of extracellular calcium in MSC differentiation: a better understanding of the early stage osteogenic differentiation program of MSC seeded on calcium-based biomaterials is required in order to develop optimal strategies to promote osteogenesis through the use of new generation osteoconductive scaffolds. A wide spectrum of analysis has been performed on time-dependent series: gene expression profiles are obtained from samples (MSC seeded on calcium-based scaffolds), together with related microRNAs expression and in vivo functional validation. On this basis, and relying on literature knowledge, hypotheses are made on the biomolecular players activated by the biomaterial calcium-phosphate component. Interestingly, a key role of miR-138 was highlighted, whose inhibition markedly increases osteogenic differentiation in vitro and enhance ectopic bone formation in vivo. Moreover, there is evidence that Ca-P substrate triggers osteogenic differentiation through genes (SMAD and RAS family) that are typically regulated during dexamethasone (DEX) induced differentiation.
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Affiliation(s)
- Federica Viti
- Institute of Biophysics, National Research Council, Genoa, Italy
- Institute of Biomedical Technologies, National Research Council, Segrate (Mi), Italy
| | - Martina Landini
- Institute of Biomedical Technologies, National Research Council, Segrate (Mi), Italy
| | - Alessandra Mezzelani
- Institute of Biomedical Technologies, National Research Council, Segrate (Mi), Italy
| | | | - Luciano Milanesi
- Institute of Biomedical Technologies, National Research Council, Segrate (Mi), Italy
| | - Silvia Scaglione
- Institute of Electronics, Computer and Telecommunication Engineering, National Research Council, Genoa, Italy
- Advanced Biotechnology Center (CBA), Genoa, Italy
- * E-mail:
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28
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Ruiz-Mendoza S, Macedo-Ramos H, Santos FA, Quadros-de-Souza LC, Paiva MM, Pinto TCA, Teixeira LM, Baetas-da-Cruz W. Streptococcus pneumoniae infection regulates expression of neurotrophic factors in the olfactory bulb and cultured olfactory ensheathing cells. Neuroscience 2016; 317:149-61. [PMID: 26791522 DOI: 10.1016/j.neuroscience.2016.01.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 12/31/2015] [Accepted: 01/05/2016] [Indexed: 12/22/2022]
Abstract
Streptococcus pneumoniae is the causative agent of numerous diseases including severe invasive infections such as bacteremia and meningitis. It has been previously shown that strains of S. pneumoniae that are unable to survive in the bloodstream may colonize the CNS. However, information on cellular components and pathways involved in the neurotropism of these strains is still scarce. The olfactory system is a specialized tissue in which olfactory receptor neurons (ORNs) are interfacing with the external environment through several microvilli. Olfactory ensheathing cells (OECs) which also form the glial limiting membrane at the surface of the olfactory bulb (OB) are the only cells that ensheathe the ORNs axons. Since previous data from our group showed that OECs may harbor S. pneumoniae, we decided to test whether infection of the OB or OEC cultures modulates the expression levels of neurotrophic factor's mRNA and its putative effects on the activation and viability of microglia. We observed that neurotrophin-3 (NT-3) and glial cell-line-derived neurotrophic factor (GDNF) expression was significantly higher in the OB from uninfected mice than in infected mice. A similar result was observed when we infected OEC cultures. Brain-derived neurotrophic factor (BNDF) expression was significantly lower in the OB from infected mice than in uninfected mice. In contrast, in vitro infection of OECs resulted in a significant increase of BDNF mRNA expression. An upregulation of high-mobility group box 1 (HMGB1) expression was observed in both OB and OEC cultures infected with S. pneumoniae. Moreover, we found that conditioned medium from infected OEC cultures induced the expression of the pro-apoptotic protein cleaved-caspase-3 and an apparently continuous nuclear factor-kappa B (NF-κB) p65 activation in the N13 microglia. Altogether, our data suggest the possible existence of an OEC-pathogen molecular interface, through which the OECs could interfere on the activation and viability of microglia, favoring the access of non-hematogenous S. pneumoniae strains to the CNS in the absence of bacteremia.
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Affiliation(s)
- S Ruiz-Mendoza
- Laboratório Translacional em Fisiologia Molecular, Centro de Cirurgia Experimental, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto de Biofísica Carlos Chagas Filho, Programa de Pós-Graduação em Ciências Biológicas (Fisiologia), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - H Macedo-Ramos
- Laboratório Translacional em Fisiologia Molecular, Centro de Cirurgia Experimental, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto de Biofísica Carlos Chagas Filho, Programa de Pós-Graduação em Ciências Biológicas (Fisiologia), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - F A Santos
- Laboratório Translacional em Fisiologia Molecular, Centro de Cirurgia Experimental, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - L C Quadros-de-Souza
- Laboratório Translacional em Fisiologia Molecular, Centro de Cirurgia Experimental, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - M M Paiva
- Instituto Nacional de Tecnologia, Rio de Janeiro, RJ, Brazil
| | - T C A Pinto
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - L M Teixeira
- Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - W Baetas-da-Cruz
- Laboratório Translacional em Fisiologia Molecular, Centro de Cirurgia Experimental, Faculdade de Medicina, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil; Instituto de Biofísica Carlos Chagas Filho, Programa de Pós-Graduação em Ciências Biológicas (Fisiologia), Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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29
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Jones E, Schäfer R. Where is the common ground between bone marrow mesenchymal stem/stromal cells from different donors and species? Stem Cell Res Ther 2015; 6:143. [PMID: 26282627 PMCID: PMC4539918 DOI: 10.1186/s13287-015-0144-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Mesenchymal stem/stromal cells (MSCs) feature promising potential for cellular therapies, yet significant progress in development of MSC therapeutics and assays is hampered because of remarkable MSC heterogeneity in vivo and in vitro. This heterogeneity poses challenges for standardization of MSC characterization and potency assays as well as for MSC study comparability and manufacturing. This review discusses promising marker combinations for prospective MSC subpopulation enrichment and expansion, and reflects MSC phenotype changes due to environment and age. In order to address animal modelling in MSC biology, comparison of mouse and human MSC markers highlights current common ground of MSCs between species.
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Affiliation(s)
- Elena Jones
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, Leeds University, Room 5.24 Clinical Sciences Building, St James's University Hospital, Leeds, LS9 7TF, UK.
| | - Richard Schäfer
- Institute for Transfusion Medicine and Immunohaematology, German Red Cross Blood Donor Service, Baden-Württemberg-Hessen gGmbH, Johann-Wolfgang-Goethe University Hospital, Sandhofstrasse 1, D-60528, Frankfurt am Main, Germany.
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30
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van Buel EM, Patas K, Peters M, Bosker FJ, Eisel ULM, Klein HC. Immune and neurotrophin stimulation by electroconvulsive therapy: is some inflammation needed after all? Transl Psychiatry 2015; 5. [PMID: 26218851 PMCID: PMC5068722 DOI: 10.1038/tp.2015.100] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A low-grade inflammatory response is commonly seen in the peripheral blood of major depressive disorder (MDD) patients, especially those with refractory and chronic disease courses. However, electroconvulsive therapy (ECT), the most drastic intervention reserved for these patients, is closely associated with an enhanced haematogenous as well as neuroinflammatory immune response, as evidenced by both human and animal studies. A related line of experimental evidence further shows that inflammatory stimulation reinforces neurotrophin expression and may even mediate dramatic neurogenic and antidepressant-like effects following exposure to chronic stress. The current review therefore attempts a synthesis of our knowledge on the neurotrophic and immunological aspects of ECT and other electrically based treatments in psychiatry. Perhaps contrary to contemporary views, we conclude that targeted potentiation, rather than suppression, of inflammatory responses may be of therapeutic relevance to chronically depressed patients or a subgroup thereof.
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Affiliation(s)
- E M van Buel
- Department of Molecular Neurobiology, Center for Life Sciences, University of Groningen, Groningen, The Netherlands,Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands,Department of Molecular Neurobiology, Center for Life Sciences, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands. E-mail:
| | - K Patas
- Department of Molecular Neurobiology, Center for Life Sciences, University of Groningen, Groningen, The Netherlands,Institute of Neuroimmunology and Multiple Sclerosis, Center for Molecular Neurobiology, University Medical Center Eppendorf, Hamburg, Germany
| | - M Peters
- Department of Molecular Neurobiology, Center for Life Sciences, University of Groningen, Groningen, The Netherlands
| | - F J Bosker
- Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - U L M Eisel
- Department of Molecular Neurobiology, Center for Life Sciences, University of Groningen, Groningen, The Netherlands,Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - H C Klein
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands,Department of Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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31
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NGF in Early Embryogenesis, Differentiation, and Pathology in the Nervous and Immune Systems. Curr Top Behav Neurosci 2015; 29:125-152. [PMID: 26695167 DOI: 10.1007/7854_2015_420] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The physiology of NGF is extremely complex, and although the study of this neurotrophin began more than 60 years ago, it is far from being concluded. NGF, its precursor molecule pro-NGF, and their different receptor systems (i.e., TrkA, p75NTR, and sortilin) have key roles in the development and adult physiology of both the nervous and immune systems. Although the NGF receptor system and the pathways activated are similar for all types of cells sensitive to NGF, the effects exerted during embryonic differentiation and in committed mature cells are strikingly different and sometimes opposite. Bearing in mind the pleiotropic effects of NGF, alterations in its expression and synthesis, as well as variations in the types of receptor available and in their respective levels of expression, may have profound effects and play multiple roles in the development and progression of several diseases. In recent years, the use of NGF or of inhibitors of its receptors has been prospected as a therapeutic tool in a variety of neurological diseases and injuries. In this review, we outline the different roles played by the NGF system in various moments of nervous and immune system differentiation and physiology, from embryonic development to aging. The data collected over the past decades indicate that NGF activities are highly integrated among systems and are necessary for the maintenance of homeostasis. Further, more integrated and multidisciplinary studies should take into consideration these multiple and interactive aspects of NGF physiology in order to design new therapeutic strategies based on the manipulation of NGF and its intracellular pathways.
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32
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Jones E, Schäfer R. Biological differences between native and cultured mesenchymal stem cells: implications for therapies. Methods Mol Biol 2015; 1235:105-120. [PMID: 25388390 DOI: 10.1007/978-1-4939-1785-3_10] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We describe the current knowledge of the surface marker phenotype of native bone marrow mesenchymal stem/stromal cells (MSCs) in humans and in mouse models, highlighting similarities in the MSC marker "signature" between the two species. The chapter proceeds to discuss the published literature pertaining to native MSC topography and their interactions with hematopoietic stem cells and their progeny, as well as with blood vessels and nerve endings. Additionally, the chapter describes phenotypic and functional "drifts" that occur in MSC preparations as they are taken out of their native bone marrow microenvironment and induced to proliferate in vitro (in the presence of animal or human serum). We propose that the understanding of the biology of MSCs in their native niches in the bone marrow could lead to future developments in the treatment of hematological diseases such as multiple myeloma. Additionally, this knowledge would assist in the development of more "natural" MSC culture conditions, best preserving MSC functionality including their homing potential in order to optimize MSC transplantation in the context of graft-versus-host and other diseases.
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Affiliation(s)
- Elena Jones
- Leeds Institute of Rheumatic and Musculoskeletal Medicine, Leeds University, Room 5.24 Clinical Sciences Building, Leeds, LS9 7TF, UK,
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33
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Kröpfl JM, Stelzer I, Mangge H, Pekovits K, Fuchs R, Allard N, Schinagl L, Hofmann P, Dohr G, Wallner-Liebmann S, Domej W, Müller W. Exercise-induced norepinephrine decreases circulating hematopoietic stem and progenitor cell colony-forming capacity. PLoS One 2014; 9:e106120. [PMID: 25180783 PMCID: PMC4152172 DOI: 10.1371/journal.pone.0106120] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 07/28/2014] [Indexed: 11/18/2022] Open
Abstract
A recent study showed that ergometry increased circulating hematopoietic stem and progenitor cell (CPC) numbers, but reduced hematopoietic colony forming capacity/functionality under normoxia and normobaric hypoxia. Herein we investigated whether an exercise-induced elevated plasma free/bound norepinephrine (NE) concentration could be responsible for directly influencing CPC functionality. Venous blood was taken from ten healthy male subjects (25.3+/-4.4 yrs) before and 4 times after ergometry under normoxia and normobaric hypoxia (FiO2<0.15). The circulating hematopoietic stem and progenitor cell numbers were correlated with free/bound NE, free/bound epinephrine (EPI), cortisol (Co) and interleukin-6 (IL-6). Additionally, the influence of exercise-induced NE and blood lactate (La) on CPC functionality was analyzed in a randomly selected group of subjects (n = 6) in vitro under normoxia by secondary colony-forming unit granulocyte macrophage assays. Concentrations of free NE, EPI, Co and IL-6 were significantly increased post-exercise under normoxia/hypoxia. Ergometry-induced free NE concentrations found in vivo showed a significant impairment of CPC functionality in vitro under normoxia. Thus, ergometry-induced free NE was thought to trigger CPC mobilization 10 minutes post-exercise, but as previously shown impairs CPC proliferative capacity/functionality at the same time. The obtained results suggest that an ergometry-induced free NE concentration has a direct negative effect on CPC functionality. Cortisol may further influence CPC dynamics and functionality.
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Affiliation(s)
- Julia M. Kröpfl
- Institute of Human Movement Sciences and Sport, Exercise Physiology Lab, ETH Zurich, Zurich, Switzerland
- Institute of Biophysics, Medical University of Graz, Graz, Austria
| | - Ingeborg Stelzer
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Research Unit on Lifestyle and Inflammation-associated Risk Biomarkers, Medical University of Graz, Graz, Austria
- Institute for Pathophysiology and Immunology, Medical University of Graz, Graz, Austria
| | - Harald Mangge
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Research Unit on Lifestyle and Inflammation-associated Risk Biomarkers, Medical University of Graz, Graz, Austria
- BioTechMed-Graz, Karl-Franzens University & Technical University & Medical University of Graz, Graz, Austria
| | - Karin Pekovits
- Department of Ophthalmology, Medical University of Graz, Graz, Austria
| | - Robert Fuchs
- Institute for Pathophysiology and Immunology, Medical University of Graz, Graz, Austria
| | - Nathalie Allard
- Institute for Pathophysiology and Immunology, Medical University of Graz, Graz, Austria
| | - Lukas Schinagl
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Research Unit on Lifestyle and Inflammation-associated Risk Biomarkers, Medical University of Graz, Graz, Austria
- Institute for Pathophysiology and Immunology, Medical University of Graz, Graz, Austria
| | - Peter Hofmann
- Institute of Sports Science, Karl-Franzens University of Graz, Graz, Austria
| | - Gottfried Dohr
- Institute of Cell Biology, Histology and Embryology, Medical University of Graz, Graz, Austria
| | | | - Wolfgang Domej
- Department of Pulmonology, Medical University of Graz, Graz, Austria
| | - Wolfram Müller
- Institute of Biophysics, Medical University of Graz, Graz, Austria
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Uren RT, Turnley AM. Regulation of neurotrophin receptor (Trk) signaling: suppressor of cytokine signaling 2 (SOCS2) is a new player. Front Mol Neurosci 2014; 7:39. [PMID: 24860421 PMCID: PMC4030161 DOI: 10.3389/fnmol.2014.00039] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 04/21/2014] [Indexed: 12/17/2022] Open
Abstract
The classic neurotrophins Nerve Growth Factor (NGF), Brain Derived Neurotrophic Factor (BDNF) and Neurotrophins NT-3 and NT-4 are well known to regulate various aspects of neuronal differentiation, survival and growth. They do this by binding to their cognate receptors, members of the Tropomyosin-related kinase (Trk) receptor tyrosine kinase family, namely TrkA, TrkB, and TrkC. These receptors are then internalized and localized to different cellular compartments, where signal transduction occurs. Conversely, members of the suppressor of cytokine signaling (SOCS) family are best known as negative regulators of signaling via the JAK/STAT pathway. Some members of the family, and in particular SOCS2, have roles in the nervous system that at least partially overlap with that of neurotrophins, namely neuronal differentiation and neurite outgrowth. Recent evidence suggests that SOCS2 is a novel regulator of NGF signaling, altering TrkA cellular localization and downstream signaling to affect neurite growth but not neuronal survival. This review first discusses regulation of Trk receptor signaling, followed by the role of SOCS2 in the nervous system and finishes with a discussion of possible mechanisms by which SOCS2 may regulate TrkA function.
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Affiliation(s)
- Rachel T Uren
- Neural Regeneration Laboratory, Centre for Neuroscience Research and Department of Anatomy and Neuroscience, The University of Melbourne Melbourne, VIC, Australia
| | - Ann M Turnley
- Neural Regeneration Laboratory, Centre for Neuroscience Research and Department of Anatomy and Neuroscience, The University of Melbourne Melbourne, VIC, Australia
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Wang Y, Liang N, Yao G, Tian H, Zhai Y, Yin Y, Sun F. Knockdown of TrkA in cumulus oocyte complexes (COCs) inhibits EGF-induced cumulus expansion by down-regulation of IL-6. Mol Cell Endocrinol 2014; 382:804-13. [PMID: 24215827 DOI: 10.1016/j.mce.2013.10.031] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 09/25/2013] [Accepted: 10/29/2013] [Indexed: 10/26/2022]
Abstract
Tyrosine kinase receptor A (TrkA), the high-affinity receptor of nerve growth factor (NGF), is known to play key roles in ovarian follicular development, such as assembly of early follicles and follicular ovulation. However, little is known about the roles of TrkA in cumulus oocyte complex (COC) expansion. In this study, we found that TrkA was abundant in large antral follicles and knockdown of TrkA in COCs attenuated epidermal growth factor (EGF)-induced COC expansion and further decreased the ovulation rate. The effect of TrkA on COC expansion was not mediated through downstream EGF effectors, phosphorylation of extracellular regulated protein kinases 1/2 (ERK1/2) or drosophila mothers against decapentaplegic protein (SMAD), or through up-regulation of COC expansion-related transcripts such as prostaglandin-endoperoxide synthase 2 (Ptgs2), hyaluronan synthase 2 (Has2), TNF-induced protein 6 (Tnfaip6) or pentraxin 3 (Ptx3). However, pharmacological blockade of TrkA transducing activity (K252α) in COCs decreased the mRNA expression and protein secretion of interleukin-6 (IL-6), identified from mRNA microarray of K252α-treated COCs. Meanwhile, knockdown of IL-6 attenuated EGF-induced COC expansion. In addition, IL-6 rescued the inhibitory effect of K252α on EGF-induced cumulus expansion. Therefore, IL-6 may act as a new potential cumulus expansion-related transcript, which may be involved in the integration of TrkA and EGF signaling in affecting COC expansion. Here, we provide mechanistic insights into the roles of TrkA in EGF-induced cumulus expansion. Understanding potential cross-points between TrkA and EGF affecting cumulus expansion will help in the discovery of new therapeutic targets in ovulation-related diseases.
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Affiliation(s)
- Yong Wang
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Ning Liang
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Guidong Yao
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China; The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Hui Tian
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yiwen Zhai
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Yimeng Yin
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Fei Sun
- Hefei National Laboratory for Physical Sciences at Microscale and School of Life Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China.
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Deshpande S, James AW, Blough J, Donneys A, Wang SC, Cederna PS, Buchman SR, Levi B. Reconciling the effects of inflammatory cytokines on mesenchymal cell osteogenic differentiation. J Surg Res 2013; 185:278-85. [PMID: 23972621 DOI: 10.1016/j.jss.2013.06.063] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 06/09/2013] [Accepted: 06/28/2013] [Indexed: 01/07/2023]
Abstract
Therapies using mesenchymal stem cells are a popular current avenue for development and utilization, especially in the fields of de novo tissue engineering (Sanchez-Ramos J, Song S, Cardozo-Pelaez F, et al. Adult bone marrow stromal cells differentiate into neural cells in vitro. Exp Neurol 2000;164:247.) or tissue regeneration after physical injury (Kitoh H, Kitakoji T, Tsuchiya H, et al. Transplantation of marrow-derived mesenchymal stem cells and platelet-rich plasma during distraction osteogenesis-a preliminary result of three cases. Bone 2004;35:892; Shumakov VI, Onishchenko NA, Rasulov MF, Krasheninnikov ME, Zaidenov VA. Mesenchymal bone marrow stem cells more effectively stimulate regeneration of deep burn wounds than embryonic fibroblasts. Bull Exp Biol Med 2003;136:192; Bruder SP, Fink DJ, Caplan AI. Mesenchymal stem cells in bone development, bone repair, and skeletal regeneration therapy. J Cell Biochem 1994;56:283.). The osteogenic potential of these cells is of particular interest, given their recent usage for the closure of critical-sized bone defects and other nonhealing bone scenarios such as a nonunion. Recent literature suggests that inflammatory cytokines can significantly impact the osteogenic potential of these cells. A review of relevant, recent literature is presented regarding the impact of the inflammatory cascade on the osteogenic differentiation of these cells and how this varies across species. Finally, we identify areas of conflicting or absent evidence regarding the behavior of mesenchymal stem cells in response to inflammatory cytokines.
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Affiliation(s)
- Sagar Deshpande
- Section of Plastic Surgery, Department of Surgery, University of Michigan, Ann Arbor, Michigan
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Lucas D, Scheiermann C, Chow A, Kunisaki Y, Bruns I, Barrick C, Tessarollo L, Frenette PS. Chemotherapy-induced bone marrow nerve injury impairs hematopoietic regeneration. Nat Med 2013; 19:695-703. [PMID: 23644514 PMCID: PMC3964478 DOI: 10.1038/nm.3155] [Citation(s) in RCA: 218] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Accepted: 03/11/2013] [Indexed: 12/13/2022]
Abstract
Anti-cancer chemotherapy drugs challenge hematopoietic tissues to regenerate, but commonly produce long-term sequelae. Deficits in hematopoietic stem or stromal cell function have been described, but the mechanisms mediating chemotherapy-induced hematopoietic dysfunction remain unclear. Administration of multiple cycles of cisplatin chemotherapy causes significant sensory neuropathy. Here, we demonstrate that chemotherapy-induced nerve injury in the bone marrow is a critical lesion impairing hematopoietic regeneration. We show using various pharmacological and genetic models that the selective loss of adrenergic innervation in the BM alters its regeneration following genotoxic insult. Sympathetic nerves in the marrow promote the survival of stem cell niche constituents that initiate recovery. Neuroprotection by deletion of Trp53 in sympathetic neurons or neuro-regeneration using 4-methylcatechol or glial-derived neurotrophic factor (GDNF) administration can restore hematopoietic recovery. Thus, these results shed light on the potential benefit of adrenergic nerve protection to shield hematopoietic niches from injury.
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Affiliation(s)
- Daniel Lucas
- Ruth L. and David S. Gottesman Institute for Stem Cell and Regenerative Medicine Research, Albert Einstein College of Medicine, New York, New York, USA
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Brain-derived neurotrophic factor serum levels and genotype: association with depression during interferon-α treatment. Neuropsychopharmacology 2013; 38:985-95. [PMID: 23303061 PMCID: PMC3629388 DOI: 10.1038/npp.2012.263] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Depression has been associated with inflammation, and inflammation may both influence and interact with growth factors such as brain-derived neurotrophic factor (BDNF). Both the functional Val66Met BDNF polymorphism (rs6265) and BDNF levels have been associated with depression. It is thus plausible that decreased BDNF could mediate and/or moderate cytokine-induced depression. We therefore prospectively employed the Beck Depression Inventory-II (BDI-II), the Hospital Anxiety and Depression Scale (HADS), and the Montgomery-Asberg Depression Rating Scale (MADRS) in 124 initially euthymic patients during treatment with interferon-alpha (IFN-α), assessing serum BDNF and rs6265. Using mixed-effect repeated measures, lower pretreatment BDNF was associated with higher depression symptoms during IFN-α treatment (F144,17.2=6.8; P<0.0001). However, although the Met allele was associated with lower BDNF levels (F1,83.0=5.0; P=0.03), it was only associated with increased MADRS scores (F4,8.9=20.3; P<0.001), and not the BDI-II or HADS. An exploratory comparison of individual BDI-II items indicated that the Met allele was associated with suicidal ideation, sadness, and worthlessness, but not neurovegetative symptoms. Conversely, the serotonin transporter promoter polymorphism (5-HTTLPR) short allele was associated with neurovegetative symptoms such as insomnia, poor appetite and fatigue, but not sadness, worthlessness, or suicidal ideation. IFN-α therapy further lowered BDNF serum levels (F4,37.7=5.0; P=0.003), but this decrease occurred regardless of depression development. The findings thus do not support the hypothesis that decreasing BDNF is the primary pathway by which IFN-α worsens depression. Nonetheless, the results support the hypothesis that BDNF levels influence resiliency against developing inflammatory cytokine-associated depression, and specifically to a subset of symptoms distinct from those influenced by 5-HTTLPR.
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Ai LS, Sun CY, Wang YD, Zhang L, Chu ZB, Qin Y, Gao F, Yan H, Guo T, Chen L, Yang D, Hu Y. Gene silencing of the BDNF/TrkB axis in multiple myeloma blocks bone destruction and tumor burden in vitro and in vivo. Int J Cancer 2013; 133:1074-84. [PMID: 23420490 DOI: 10.1002/ijc.28116] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 02/08/2013] [Indexed: 11/10/2022]
Abstract
Osteolytic bone diseases are a prominent feature of multiple myeloma (MM), resulting from aberrant osteoclastic bone resorption that is uncoupled from osteoblastic bone formation. Myeloma stimulates osteoclastogenesis, which is largely dependent on an increase in receptor activator of NF-κB ligand (RANKL) and a decrease in osteoprotegerin (OPG) within the bone marrow milieu. Recently, brain-derived neurotrophic factor (BDNF) was identified as a MM-derived factor that correlates with increased RANKL levels and contributes to osteolytic bone destruction in myeloma patients. Because tyrosine receptor kinase B (TrkB), the receptor of BDNF, is abundantly expressed in osteoblasts, we sought to evaluate the role of BDNF/TrkB in myeloma-osteoblast interactions and the effect of this pathway on the RANKL/OPG ratio and osteoclastogenesis. Coculture systems constructed with noncontact transwells revealed that, in vitro, MM-derived BDNF increased RANKL and decreased OPG production in osteoblasts in a time- and dose-dependent manner. These effects were completely abolished by a specific small interfering RNA for TrkB. BDNF regulates RANKL/OPG expression in osteoblasts through the TrkB/ERK pathway. To investigate the biological effects of BDNF on myeloma in vivo, a SCID-RPMI8226 mice model was constructed using lentiviral short hairpin RNA-transfected RPMI8226 cells. In this system, stable knockdown of BDNF in MM cells significantly restored the RANKL/OPG homostasis, inhibited osteolytic bone destruction and reduced angiogenesis and tumor burden. Our studies provide further support for the potential osteoclastogenic effects of BDNF, which mediates stroma-myeloma interactions to disrupt the balance of RANKL/OPG expression, ultimately increasing osteoclastogenesis in MM.
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Affiliation(s)
- Li-Sha Ai
- Institute of Hematology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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Nugraha B, Korallus C, Gutenbrunner C. Serum level of brain-derived neurotrophic factor in fibromyalgia syndrome correlates with depression but not anxiety. Neurochem Int 2013; 62:281-6. [DOI: 10.1016/j.neuint.2013.01.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 12/14/2012] [Accepted: 01/04/2013] [Indexed: 11/27/2022]
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IL-6 treatment increases the survival of retinal ganglion cells in vitro: The role of adenosine A1 receptor. Biochem Biophys Res Commun 2013; 430:512-8. [DOI: 10.1016/j.bbrc.2012.12.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Accepted: 12/03/2012] [Indexed: 11/23/2022]
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Ritter C, Miranda AS, Giombelli VR, Tomasi CD, Comim CM, Teixeira AL, Quevedo J, Dal-Pizzol F. Brain-derived neurotrophic factor plasma levels are associated with mortality in critically ill patients even in the absence of brain injury. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2012; 16:R234. [PMID: 23245494 PMCID: PMC3672623 DOI: 10.1186/cc11902] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/18/2012] [Accepted: 11/26/2012] [Indexed: 12/15/2022]
Abstract
Introduction Because of its relevance to the functioning of the central nervous system, brain-derived neurotrophic factor (BDNF) has been implicated in the pathogenesis of different neuropsychiatric diseases. Whether the BDNF level can be a marker of brain dysfunction and thus predict mortality in critically ill patients is not known. Thus we aimed to determine whether the plasma levels of BDNF are associated with morbidity and mortality in critically ill patients. Methods Healthy volunteers (n = 40) and consecutive patients older than 18 years (n = 76) admitted for more than 24 hours in an Intensive Care Unit (ICU) in a University hospital between July and October 2010 were included in the present study. First blood samples were collected within 12 hours of enrollment (D0), and a second sample, 48 hours after (D2) for determination of plasma BDNF levels. The relation between BDNF levels and mortality was the primary outcome. The secondary outcomes were the relation between BDNF levels and delirium and coma-free days (DCFD) and ICU and hospital length of stay (LOS). Results Admission plasma levels of BDNF were higher in ICU patients when compared with healthy volunteers (1,536 (962) versus 6,565 (2,838) pg/ml). The mean BDNF D2 was significantly lower in nonsurvivor patients (5,865 (2,662) versus 6,741 (2,356) pg/ml). After adjusting for covariates, BDNF levels, the need for mechanical ventilation, and sepsis were associated with mortality. Even in patients without clinically detectable brain dysfunction, lower BDNF D2 levels were associated with mortality. BDNF D2 had a mild correlation to DCFD (r = 0.44), but not to ICU and hospital LOS. In addition, plasma BDNF did not correlate to different plasma cytokines and platelets levels. Conclusions The plasma levels of BDNF were independently associated with mortality, even in the absence of clinically detectable brain dysfunction.
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Inhibition of BDNF in multiple myeloma blocks osteoclastogenesis via down-regulated stroma-derived RANKL expression both in vitro and in vivo. PLoS One 2012; 7:e46287. [PMID: 23077504 PMCID: PMC3471864 DOI: 10.1371/journal.pone.0046287] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 08/28/2012] [Indexed: 01/08/2023] Open
Abstract
Brain-derived neurotrophic factor (BDNF) was recently identified as a factor produced by multiple myeloma (MM) cells, which may contribute to bone resorption and disease progression in MM, though the molecular mechanism of this process is not well understood. The purpose of this study was to test the effect of BDNF on bone disease and growth of MM cells both in vitro and in vivo. Co- and triple-culture systems were implemented. The in vitro results demonstrate that BDNF augmented receptor activator of nuclear factor kappa B ligand (RANKL) expression in human bone marrow stromal cells, thus contributing to osteoclast formation. To further clarify the effect of BDNF on myeloma bone disease in vivo, ARH-77 cells were stably transfected with an antisense construct to BDNF (AS-ARH) or empty vector (EV-ARH) to test their capacity to induce MM bone disease in SCID–rab mice. Mice treated with AS-ARH cells were preserved, exhibited no radiologically identifiable lytic lesions and, unlike the controls treated with EV-ARH cells, lived longer and showed reduced tumor burden. Consistently, bones harboring AS-ARH cells showed marked reductions of RANKL expression and osteoclast density compared to the controls harboring EV-ARH cells. These results provide further support for the potential osteoclastogenic effects of BDNF, which may mediate stromal–MM cell interactions to upregulate RANKL secretion, in myeloma bone diseases.
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Chou DB, Sworder B, Bouladoux N, Roy CN, Uchida AM, Grigg M, Robey PG, Belkaid Y. Stromal-derived IL-6 alters the balance of myeloerythroid progenitors during Toxoplasma gondii infection. J Leukoc Biol 2012; 92:123-31. [PMID: 22493080 DOI: 10.1189/jlb.1011527] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Inflammation alters hematopoiesis, often by decreasing erythropoiesis and enhancing myeloid output. The mechanisms behind these changes and how the BM stroma contributes to this process are active areas of research. In this study, we examine these questions in the setting of murine Toxoplasma gondii infection. Our data reveal that infection alters early myeloerythroid differentiation, blocking erythroid development beyond the Pre MegE stage, while expanding the GMP population. IL-6 was found to be a critical mediator of these differences, independent of hepcidin-induced iron restriction. Comparing the BM with the spleen showed that the hematopoietic response was driven by the local microenvironment, and BM chimeras demonstrated that radioresistant cells were the relevant source of IL-6 in vivo. Finally, direct ex vivo sorting revealed that VCAM(+)CD146(lo) BM stromal fibroblasts significantly increase IL-6 secretion after infection. These data suggest that BMSCs regulate the hematopoietic changes during inflammation via IL-6.
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Affiliation(s)
- David B Chou
- Mucosal Immunology, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
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Herndler-Brandstetter D, Landgraf K, Tzankov A, Jenewein B, Brunauer R, Laschober GT, Parson W, Kloss F, Gassner R, Lepperdinger G, Grubeck-Loebenstein B. The impact of aging on memory T cell phenotype and function in the human bone marrow. J Leukoc Biol 2011; 91:197-205. [PMID: 22013229 DOI: 10.1189/jlb.0611299] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Recently, the BM has been shown to play a key role in regulating the survival and function of memory T cells. However, the impact of aging on these processes has not yet been studied. We demonstrate that the number of CD4⁺ and CD8⁺ T cells in the BM is maintained during aging. However, the composition of the T cell pool in the aged BM is altered with a decline of naïve and an increase in T(EM) cells. In contrast to the PB, a highly activated CD8⁺CD28⁻ T cell population, which lacks the late differentiation marker CD57, accumulates in the BM of elderly persons. IL-6 and IL-15, which are both increased in the aged BM, efficiently induce the activation, proliferation, and differentiation of CD8⁺ T cells in vitro, highlighting a role of these cytokines in the age-dependent accumulation of highly activated CD8⁺CD28⁻ T cells in the BM. Yet, these age-related changes do not impair the maintenance of a high number of polyfunctional memory CD4⁺ and CD8⁺ T cells in the BM of elderly persons. In summary, aging leads to the accumulation of a highly activated CD8⁺CD28⁻ T cell population in the BM, which is driven by the age-related increase of IL-6 and IL-15. Despite these changes, the aged BM is a rich source of polyfunctional memory T cells and may thus represent an important line of defense to fight recurrent infections in old age.
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Shichinohe H, Kuroda S, Sugiyama T, Ito M, Kawabori M, Nishio M, Takeda Y, Koike T, Houkin K. Biological Features of Human Bone Marrow Stromal Cells (hBMSC) Cultured with Animal Protein-Free Medium—Safety and Efficacy of Clinical Use for Neurotransplantation. Transl Stroke Res 2011; 2:307-15. [DOI: 10.1007/s12975-011-0088-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 05/24/2011] [Accepted: 06/03/2011] [Indexed: 01/07/2023]
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Donev R, Thome J. Inflammation: good or bad for ADHD? ACTA ACUST UNITED AC 2010; 2:257-66. [PMID: 21432611 DOI: 10.1007/s12402-010-0038-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Accepted: 10/11/2010] [Indexed: 12/19/2022]
Abstract
Attention deficit hyperactivity disorder (ADHD) is characterised by the typical behavioural core symptoms of inattentiveness, hyperactivity and impulsiveness. ADHD is a usually chronic health conditions, mostly diagnosed in childhood, creating a significant challenge for youth, their families and professionals who treat it. This disorder requires long-term treatments, including psychotherapeutic and pharmacological interventions, which in some cases may lead to adverse effects. Understanding the mechanism by which ADHD risk factors affect the biochemical processes in the human brain and consequentially the behaviour will help to identify novel targets for the development of therapeutics with less adverse results and better efficacy including higher responder rates. Although inflammatory responses in the brain have been recognised for years as critical in neurodegeneration and behaviour in a number of neurological and psychiatric disorders, their role for the development, treatment and prevention of ADHD has been so far largely overlooked, although historically, ADHD symptoms were initially observed in patients who survived an ONJ infection, i.e. inflammation. In this review, we discuss the interrelationship between different ADHD risk factors and inflammation with respect to the triggered molecular mechanisms and the contribution they are likely to have to this disorder. This paper provides a rationale for future studies on ADHD with an intent to inspiring the development of new agents for a more efficient management of this disorder.
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Affiliation(s)
- Rossen Donev
- Academic Unit of Psychiatry, The School of Medicine, University of Wales Swansea, Institute of Life Science, UK
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