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Tota M, Jonderko L, Witek J, Novickij V, Kulbacka J. Cellular and Molecular Effects of Magnetic Fields. Int J Mol Sci 2024; 25:8973. [PMID: 39201657 PMCID: PMC11354277 DOI: 10.3390/ijms25168973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2024] [Revised: 08/09/2024] [Accepted: 08/14/2024] [Indexed: 09/02/2024] Open
Abstract
Recently, magnetic fields (MFs) have received major attention due to their potential therapeutic applications and biological effects. This review provides a comprehensive analysis of the cellular and molecular impacts of MFs, with a focus on both in vitro and in vivo studies. We investigate the mechanisms by which MFs influence cell behavior, including modifications in gene expression, protein synthesis, and cellular signaling pathways. The interaction of MFs with cellular components such as ion channels, membranes, and the cytoskeleton is analyzed, along with their effects on cellular processes like proliferation, differentiation, and apoptosis. Molecular insights are offered into how MFs modulate oxidative stress and inflammatory responses, which are pivotal in various pathological conditions. Furthermore, we explore the therapeutic potential of MFs in regenerative medicine, cancer treatment, and neurodegenerative diseases. By synthesizing current findings, this article aims to elucidate the complex bioeffects of MFs, thereby facilitating their optimized application in medical and biotechnological fields.
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Affiliation(s)
- Maciej Tota
- Student Research Group № K148, Faculty of Medicine, Wroclaw Medical University, 50-367 Wroclaw, Poland;
| | - Laura Jonderko
- Student Research Group № K148, Faculty of Pharmacy, Wroclaw Medical University, 50-367 Wroclaw, Poland; (L.J.); (J.W.)
| | - Julia Witek
- Student Research Group № K148, Faculty of Pharmacy, Wroclaw Medical University, 50-367 Wroclaw, Poland; (L.J.); (J.W.)
| | - Vitalij Novickij
- Institute of High Magnetic Fields, Vilnius Gediminas Technical University, LT-03227 Vilnius, Lithuania;
- Department of Immunology, State Research Institute Centre for Innovative Medicine, Santariškių 5, LT-08410 Vilnius, Lithuania
| | - Julita Kulbacka
- Department of Immunology, State Research Institute Centre for Innovative Medicine, Santariškių 5, LT-08410 Vilnius, Lithuania
- Department of Molecular and Cellular Biology, Faculty of Pharmacy, Wroclaw Medical University, 50-367 Wrocław, Poland
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2
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Tominami K, Kudo TA, Noguchi T, Hayashi Y, Luo YR, Tanaka T, Matsushita A, Izumi S, Sato H, Gengyo-Ando K, Matsuzawa A, Hong G, Nakai J. Physical Stimulation Methods Developed for In Vitro Neuronal Differentiation Studies of PC12 Cells: A Comprehensive Review. Int J Mol Sci 2024; 25:772. [PMID: 38255846 PMCID: PMC10815383 DOI: 10.3390/ijms25020772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/24/2024] Open
Abstract
PC12 cells, which are derived from rat adrenal pheochromocytoma cells, are widely used for the study of neuronal differentiation. NGF induces neuronal differentiation in PC12 cells by activating intracellular pathways via the TrkA receptor, which results in elongated neurites and neuron-like characteristics. Moreover, the differentiation requires both the ERK1/2 and p38 MAPK pathways. In addition to NGF, BMPs can also induce neuronal differentiation in PC12 cells. BMPs are part of the TGF-β cytokine superfamily and activate signaling pathways such as p38 MAPK and Smad. However, the brief lifespan of NGF and BMPs may limit their effectiveness in living organisms. Although PC12 cells are used to study the effects of various physical stimuli on neuronal differentiation, the development of new methods and an understanding of the molecular mechanisms are ongoing. In this comprehensive review, we discuss the induction of neuronal differentiation in PC12 cells without relying on NGF, which is already established for electrical, electromagnetic, and thermal stimulation but poses a challenge for mechanical, ultrasound, and light stimulation. Furthermore, the mechanisms underlying neuronal differentiation induced by physical stimuli remain largely unknown. Elucidating these mechanisms holds promise for developing new methods for neural regeneration and advancing neuroregenerative medical technologies using neural stem cells.
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Affiliation(s)
- Kanako Tominami
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Tada-aki Kudo
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Takuya Noguchi
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Yohei Hayashi
- Cell Resource Center for Biomedical Research, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
- Graduate School of Life Sciences, Tohoku University, Sendai 980-8577, Japan
| | - You-Ran Luo
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Takakuni Tanaka
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Ayumu Matsushita
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Satoshi Izumi
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Hajime Sato
- Division of Pharmacology, Meikai University School of Dentistry, Sakado 350-0283, Japan
| | - Keiko Gengyo-Ando
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Atsushi Matsuzawa
- Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Guang Hong
- Division for Globalization Initiative, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
| | - Junichi Nakai
- Division of Oral Physiology, Tohoku University Graduate School of Dentistry, Sendai 980-8575, Japan
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3
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Dutta S, Ganguly A, Chatterjee K, Spada S, Mukherjee S. Targets of Immune Escape Mechanisms in Cancer: Basis for Development and Evolution of Cancer Immune Checkpoint Inhibitors. BIOLOGY 2023; 12:biology12020218. [PMID: 36829496 PMCID: PMC9952779 DOI: 10.3390/biology12020218] [Citation(s) in RCA: 39] [Impact Index Per Article: 39.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2022] [Revised: 01/22/2023] [Accepted: 01/27/2023] [Indexed: 02/03/2023]
Abstract
Immune checkpoint blockade (ICB) has emerged as a novel therapeutic tool for cancer therapy in the last decade. Unfortunately, a small number of patients benefit from approved immune checkpoint inhibitors (ICIs). Therefore, multiple studies are being conducted to find new ICIs and combination strategies to improve the current ICIs. In this review, we discuss some approved immune checkpoints, such as PD-L1, PD-1, and CTLA-4, and also highlight newer emerging ICIs. For instance, HLA-E, overexpressed by tumor cells, represents an immune-suppressive feature by binding CD94/NKG2A, on NK and T cells. NKG2A blockade recruits CD8+ T cells and activates NK cells to decrease the tumor burden. NKG2D acts as an NK cell activating receptor that can also be a potential ICI. The adenosine A2A and A2B receptors, CD47-SIRPα, TIM-3, LAG-3, TIGIT, and VISTA are targets that also contribute to cancer immunoresistance and have been considered for clinical trials. Their antitumor immunosuppressive functions can be used to develop blocking antibodies. PARPs, mARTs, and B7-H3 are also other potential targets for immunosuppression. Additionally, miRNA, mRNA, and CRISPR-Cas9-mediated immunotherapeutic approaches are being investigated with great interest. Pre-clinical and clinical studies project these targets as potential immunotherapeutic candidates in different cancer types for their robust antitumor modulation.
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Affiliation(s)
- Shovan Dutta
- The Center for Immunotherapy & Precision Immuno-Oncology (CITI), Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Anirban Ganguly
- Department of Biochemistry, All India Institute of Medical Sciences, Deoghar 814152, India
| | | | - Sheila Spada
- Department of Radiation Oncology, Weill Cornell Medicine, New York, NY 10065, USA
- Correspondence: (S.S.); (S.M.)
| | - Sumit Mukherjee
- Department of Cardiothoracic and Vascular Surgery, Albert Einstein College of Medicine, Bronx, NY 10461, USA
- Correspondence: (S.S.); (S.M.)
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4
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Nieto CT, Manchado A, Belda L, Diez D, Garrido NM. 2-Phenethylamines in Medicinal Chemistry: A Review. MOLECULES (BASEL, SWITZERLAND) 2023; 28:molecules28020855. [PMID: 36677913 PMCID: PMC9864394 DOI: 10.3390/molecules28020855] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 01/19/2023]
Abstract
A concise review covering updated presence and role of 2-phenethylamines in medicinal chemistry is presented. Open-chain, flexible alicyclic amine derivatives of this motif are enumerated in key therapeutic targets, listing medicinal chemistry hits and appealing screening compounds. Latest reports in discovering new bioactive 2-phenethylamines by research groups are covered too.
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5
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Lai H. Neurological effects of static and extremely-low frequency electromagnetic fields. Electromagn Biol Med 2022; 41:201-221. [DOI: 10.1080/15368378.2022.2064489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Henry Lai
- Department of Bioengineering, University of Washington, Seattle, WA, USA
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6
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Sun C, Wang B, Hao S. Adenosine-A2A Receptor Pathway in Cancer Immunotherapy. Front Immunol 2022; 13:837230. [PMID: 35386701 PMCID: PMC8977492 DOI: 10.3389/fimmu.2022.837230] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 02/28/2022] [Indexed: 12/14/2022] Open
Abstract
A2A receptors (A2AR), a typical GPCR with a high affinity for adenosine, was expressed in many immune cells, such as regulatory T cells, cytotoxic T cells, macrophages, etc. Adenosine binding to the A2AR receptor activates the typical G protein and triggers the cAMP/PKA/CREB pathway. The adenosine-A2AR pathway plays an important role in protecting normal organs and tissues from the autoimmune response of immune cells. However, many solid tumors hijack the adenosine-A2AR pathway by promoting adenosine accumulation. The activation of the A2AR pathway inhibited the immune response of immune cells and then promotes the immune escape of tumor cells in the tumor microenvironment. Recently, both animal experiments and clinical trials indicated that blocking the adenosine pathway can inhibit the progression of a variety of solid tumors. In addition, it is encouraging that A2AR blockade combined with CAR T cells therapy showed better anti-tumor efficacy. Therefore, this review will discuss the role of the adenosine-A2AR pathway in the tumor microenvironment and summarize recent advances of A2AR-cancer related studies.
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Affiliation(s)
- Changfa Sun
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Bochu Wang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
| | - Shilei Hao
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, China
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7
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Shang L, Huang Y, Xie X, Ye S, Chen C. Effect of Adenosine Receptor Antagonists on Adenosine-Pretreated PC12 Cells Exposed to Paraquat. Dose Response 2022; 20:15593258221093411. [PMID: 35431696 PMCID: PMC9005745 DOI: 10.1177/15593258221093411] [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: 02/16/2022] [Accepted: 03/23/2022] [Indexed: 11/15/2022] Open
Abstract
Previous studies evaluated the adenosine receptor antagonists alone to determine
their effects on oxidative stress, but little is known about adenosine’s
protective efficacy when oxidative injury occurs in vivo. Adenosine is a crucial
signaling molecule recognized by four distinct G-protein-coupled receptors
(GPCRs) (i.e., A1R, A2AR, A2BR, and A3R) and protects cells against pathological
conditions. The present study was performed to evaluate the role of antagonist
modulation in the setting of paraquat toxicity with adenosine pretreatment.
First, PC12 cells were exposed to paraquat (850 μM) and adenosine (30 μM) to
develop an in vitro model for the antagonist effect assay. Second, we found that
the A1R antagonist DPCPX enhanced the viability of paraquat-induced PC12 cells
that underwent adenosine pretreatment. Moreover, the A2AR antagonist ZM241385
decreased the viability of paraquat-induced PC12 cells that underwent adenosine
pretreatment. Our findings indicate that adenosine protection requires a dual
blockade of A1R and activation of A2AR to work at its full potential, and the
A2B and A3 adenosine receptor antagonists increased paraquat-induced oxidative
damage. This represents a novel pharmacological strategy based on A1/A2A
interactions and can assist in clarifying the role played by AR antagonists in
the treatment of neurodegenerative diseases.
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Affiliation(s)
- Liangcheng Shang
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, Engineering Training Centre, China Jiliang University, Hangzhou, China
| | - Yaobiao Huang
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, Engineering Training Centre, China Jiliang University, Hangzhou, China
| | - Xin Xie
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, Engineering Training Centre, China Jiliang University, Hangzhou, China
| | - Sudan Ye
- Zhejiang Institute of Economic and Trade, Hangzhou, China
| | - Chun Chen
- Zhejiang Provincial Key Laboratory of Biometrology and Inspection & Quarantine, Engineering Training Centre, China Jiliang University, Hangzhou, China
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Semeano AT, Tofoli FA, Corrêa-Velloso JC, de Jesus Santos AP, Oliveira-Giacomelli Á, Cardoso RR, Pessoa MA, da Rocha EL, Ribeiro G, Ferrari MFR, Pereira LV, Teng YD, Petri DFS, Ulrich H. Effects of Magnetite Nanoparticles and Static Magnetic Field on Neural Differentiation of Pluripotent Stem Cells. Stem Cell Rev Rep 2022; 18:1337-1354. [PMID: 35325357 DOI: 10.1007/s12015-022-10332-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2021] [Indexed: 12/24/2022]
Abstract
Neurodevelopmental processes of pluripotent cells, such as proliferation and differentiation, are influenced by external natural forces. Despite the presence of biogenic magnetite nanoparticles in the central nervous system and constant exposure to the Earth's magnetic fields and other sources, there is scant knowledge regarding the role of electromagnetic stimuli in neurogenesis. Moreover, emerging applications of electrical and magnetic stimulation to treat neurological disorders emphasize the relevance of understanding the impact and mechanisms behind these stimuli. Here, the effects of magnetic nanoparticles (MNPs) in polymeric coatings and the static external magnetic field (EMF) were investigated on neural induction of murine embryonic stem cells (mESCs) and human induced pluripotent stem cells (hiPSCs). The results show that the presence of 0.5% MNPs in collagen-based coatings facilitates the migration and neuronal maturation of mESCs and hiPSCs in vitro. Furthermore, the application of 0.4 Tesla EMF perpendicularly to the cell culture plane, discernibly stimulates proliferation and guide fate decisions of the pluripotent stem cells, depending on the origin of stem cells and their developmental stage. Mechanistic analysis reveals that modulation of ionic homeostasis and the expression of proteins involved in cytostructural, liposomal and cell cycle checkpoint functions provide a principal underpinning for the impact of electromagnetic stimuli on neural lineage specification and proliferation. These findings not only explore the potential of the magnetic stimuli as neural differentiation and function modulator but also highlight the risks that immoderate magnetic stimulation may affect more susceptible neurons, such as dopaminergic neurons.
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Affiliation(s)
- Ana T Semeano
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748. Sala 964 Bloco 9 Superior, Cidade Universitária, São Paulo, SP, 05508-000, Brazil.,Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748. Sala 307 Bloco 3 Inferior, Cidade Universitária, São Paulo, SP, 05508-000, Brazil.,Department of Pharmaceutical Sciences, School of Pharmacy, Bouvé College of Health Sciences, Northeastern University, Boston, MA, 02115, USA
| | - Fabiano A Tofoli
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil
| | - Juliana C Corrêa-Velloso
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748. Sala 964 Bloco 9 Superior, Cidade Universitária, São Paulo, SP, 05508-000, Brazil
| | - Ana P de Jesus Santos
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748. Sala 964 Bloco 9 Superior, Cidade Universitária, São Paulo, SP, 05508-000, Brazil
| | - Ágatha Oliveira-Giacomelli
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748. Sala 964 Bloco 9 Superior, Cidade Universitária, São Paulo, SP, 05508-000, Brazil
| | - Rafaela R Cardoso
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil
| | - Mateus A Pessoa
- Department of Microbiology, Immunology and Parasitology at Federal University of Santa Catarina, Florianópolis, Brazil
| | - Edroaldo Lummertz da Rocha
- Department of Microbiology, Immunology and Parasitology at Federal University of Santa Catarina, Florianópolis, Brazil
| | - Gustavo Ribeiro
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil
| | - Merari F R Ferrari
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil
| | - Lygia V Pereira
- Department of Genetics and Evolutionary Biology, Institute of Biosciences, University of São Paulo, São Paulo, Brazil
| | - Yang D Teng
- Laboratory of SCI, Stem Cell and Recovery Neurobiology Research, Department of Physical Medicine & Rehabilitation, Harvard Medical School, Spaulding Rehabilitation Hospital Network, and Mass General Brigham, Boston, MA, USA
| | - Denise F S Petri
- Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748. Sala 307 Bloco 3 Inferior, Cidade Universitária, São Paulo, SP, 05508-000, Brazil.
| | - Henning Ulrich
- Department of Biochemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748. Sala 964 Bloco 9 Superior, Cidade Universitária, São Paulo, SP, 05508-000, Brazil.
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Lew WZ, Feng SW, Lee SY, Huang HM. The Review of Bioeffects of Static Magnetic Fields on the Oral Tissue-Derived Cells and Its Application in Regenerative Medicine. Cells 2021; 10:cells10102662. [PMID: 34685642 PMCID: PMC8534790 DOI: 10.3390/cells10102662] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 09/30/2021] [Accepted: 10/02/2021] [Indexed: 12/13/2022] Open
Abstract
Magnets have been widely used in dentistry for orthodontic tooth movement and denture retention. Nevertheless, criticisms have arisen regarding the biosafety of static magnetic field (SMF) effects on surrounding tissues. Various controversial pieces of evidence have been discussed regarding SMFs on cellular biophysics, but little consensus has been reached, especially in the field of dentistry. Thus, the present paper will first review the safe use of SMFs in the oral cavity and as an additive therapy to orthodontic tooth movement and periodontium regeneration. Then, studies regarding SMF-incorporated implants are reviewed to investigate the advantageous effects of SMFs on osseointegration and the underlying mechanisms. Finally, a review of current developments in dentistry surrounding the combination of magnetic nanoparticles (MNPs) and SMFs is made to clarify potential future clinical applications.
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Affiliation(s)
- Wei-Zhen Lew
- School of Dentistry, Collage of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan; (W.-Z.L.); (S.-W.F.); (S.-Y.L.)
| | - Sheng-Wei Feng
- School of Dentistry, Collage of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan; (W.-Z.L.); (S.-W.F.); (S.-Y.L.)
- Department of Dentistry, Division of Prosthodontics, Taipei Medical University Hospital, Taipei 11031, Taiwan
| | - Sheng-Yang Lee
- School of Dentistry, Collage of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan; (W.-Z.L.); (S.-W.F.); (S.-Y.L.)
| | - Haw-Ming Huang
- School of Dentistry, Collage of Oral Medicine, Taipei Medical University, Taipei 11031, Taiwan; (W.-Z.L.); (S.-W.F.); (S.-Y.L.)
- Graduate Institute of Biomedical Optomechatronics, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
- Correspondence:
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Gmitrov J. Static Magnetic Field Versus Systemic Calcium Channel Blockade Effect on Microcirculation: Possible Mechanisms and Clinical Implementation. Bioelectromagnetics 2020; 41:447-457. [DOI: 10.1002/bem.22272] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 05/03/2020] [Accepted: 05/18/2020] [Indexed: 01/13/2023]
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11
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Moderate Intensity Static Magnetic Fields Prevent Thrombus Formation in Rats and Mice. Bioelectromagnetics 2019; 41:52-62. [DOI: 10.1002/bem.22232] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/09/2019] [Indexed: 12/22/2022]
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12
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Signaling pathways involved in anti-inflammatory effects of Pulsed Electromagnetic Field in microglial cells. Cytokine 2019; 125:154777. [PMID: 31400640 DOI: 10.1016/j.cyto.2019.154777] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 06/14/2019] [Accepted: 07/09/2019] [Indexed: 11/27/2022]
Abstract
Literature studies suggest important protective effects of low-frequency, low-energy pulsed electromagnetic fields (PEMFs) on inflammatory pathways affecting joint and cerebral diseases. However, it is not clear on which bases they affect neuroprotection and the mechanism responsible is yet unknown. Therefore the aim of this study was to identify the molecular targets of PEMFs anti-neuroinflammatory action. The effects of PEMF exposure in cytokine production by lipopolysaccharide (LPS)-activated N9 microglial cells as well as the pathways involved, including adenylyl cyclase (AC), phospholipase C (PLC), protein kinase C epsilon (PKC-ε) and delta (PKC-δ), p38, ERK1/2, JNK1/2 mitogen activated protein kinases (MAPK), Akt and caspase 1, were investigated. In addition, the ability of PEMFs to modulate ROS generation, cell invasion and phagocytosis, was addressed. PEMFs reduced the LPS-increased production of TNF-α and IL-1β in N9 cells, through a pathway involving JNK1/2. Furthermore, they decreased the LPS-induced release of IL-6, by a mechanism not dependent on AC, PLC, PKC-ε, PKC-δ, p38, ERK1/2, JNK1/2, Akt and caspase 1. Importantly, a significant effect of PEMFs in the reduction of crucial cell functions specific of microglia like ROS generation, cell invasion and phagocytosis was found. PEMFs inhibit neuroinflammation in N9 cells through a mechanism involving, at least in part, the activation of JNK MAPK signalling pathway and may be relevant to treat a variety of diseases characterized by neuroinflammation.
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13
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Rivadulla C, Aguilar J, Coletti M, Aguila J, Prieto S, Cudeiro J. Static magnetic fields reduce epileptiform activity in anesthetized rat and monkey. Sci Rep 2018; 8:15985. [PMID: 30375430 PMCID: PMC6207659 DOI: 10.1038/s41598-018-33808-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Accepted: 10/05/2018] [Indexed: 02/06/2023] Open
Abstract
Increasing evidence indicates that static magnetic fields (SMF) reduce cortical activity in both human and animal models. The aim of this work was to investigate the effect of SMF on epileptiform cortical activity, a condition related to an abnormal increase in neuronal excitability. The first experimental block included a Pilocarpine rat model of epilepsy, in which a magnetic neodymium nickel-plated cylinder, a magnetic field of 0.5 T, or “sham” were placed over the skull. In the second experimental block, we recorded epileptic-like activity in the visual cortex of a monkey (Macaca mulatta) under control conditions and in the presence of the magnet. Between 15 and 30 minutes after the second dose of Pilocarpine, EEG changes compatible with seizure like events induced by Pilocarpine were clearly observed in the control animals (sham stimulation). Similar effects were visible in the animals exposed to the real magnet after 1–2 hours. In the monkey, SMF over the cortical focus clearly reduced abnormal activity: the intensity threshold for visual induction increased and the severity and duration decreased. These results reinforce the view that static magnets modulate cortical activity and open the door to the future therapeutic use of SMF in epilepsy as a complement to current pharmacological treatments.
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Affiliation(s)
- Casto Rivadulla
- NEUROcom, School of Health Sciences University of A Coruna, and Agrupación estratégica CICA-INIBIC - UdC, A Coruna, Spain.
| | - Juan Aguilar
- Laboratorio de Neurofisiología Experimental, Hospital Nacional de Parapléjicos, Servicio de Salud de Castilla-La Mancha, Toledo, Spain.
| | - Marcos Coletti
- NEUROcom, School of Health Sciences University of A Coruna, and Agrupación estratégica CICA-INIBIC - UdC, A Coruna, Spain
| | - Jordi Aguila
- NEUROcom, School of Health Sciences University of A Coruna, and Agrupación estratégica CICA-INIBIC - UdC, A Coruna, Spain
| | - Sandra Prieto
- NEUROcom, School of Health Sciences University of A Coruna, and Agrupación estratégica CICA-INIBIC - UdC, A Coruna, Spain
| | - Javier Cudeiro
- NEUROcom, School of Health Sciences University of A Coruna, and Agrupación estratégica CICA-INIBIC - UdC, A Coruna, Spain.,Cerebral Stimulation Centre of Galicia, A Coruna, Spain
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14
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Wang D, Zhang L, Shao G, Yang S, Tao S, Fang K, Zhang X. 6-mT 0-120-Hz magnetic fields differentially affect cellular ATP levels. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:28237-28247. [PMID: 30074140 DOI: 10.1007/s11356-018-2868-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Accepted: 07/27/2018] [Indexed: 06/08/2023]
Abstract
Adenosine triphosphate (ATP), an indispensable molecule that provides energy for essentially all cellular processes, has been shown to be affected by some magnetic fields (MFs). Although people are frequently exposed to various static and power frequency MFs in their daily lives, the exact effects of these MFs of different frequencies have not been systematically investigated. Here, we tested 6-mT MFs with 0, 50, and 120 Hz for their effects on cellular ATP levels in 11 different cell lines. We found that the 6-mT static magnetic field (SMF) either does not affect or increase cellular ATP levels, while 6-mT 50-Hz MF either does not affect or decrease cellular ATP levels. In contrast, 6-mT 120-Hz MF has variable effects. We examined the mitochondrial membrane potential (MMP) as well as reactive oxygen species (ROS) in four different cell lines, but did not find their direct correlation with ATP levels. Although none of the ATP level changes induced by these three different frequencies of 6-mT MFs are dramatic, these results may be used to explain some differential cellular responses of various cell lines to different frequency MFs.
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Affiliation(s)
- Dongmei Wang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, China
- University of Science and Technology of China, Hefei, 230036, Anhui, China
| | - Lei Zhang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, China
- University of Science and Technology of China, Hefei, 230036, Anhui, China
| | - Guangze Shao
- First School of Clinical Medicine, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Shuo Yang
- First School of Clinical Medicine, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Shengwei Tao
- First School of Clinical Medicine, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Kun Fang
- First School of Clinical Medicine, Anhui Medical University, Hefei, 230032, Anhui, China
| | - Xin Zhang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, 230031, Anhui, China.
- Institute of Physical Science and Information Technology, Anhui University, Hefei, 230601, Anhui, China.
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15
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Wang D, Wang Z, Zhang L, Li Z, Tian X, Fang J, Lu Q, Zhang X. Cellular ATP levels are affected by moderate and strong static magnetic fields. Bioelectromagnetics 2018; 39:352-360. [PMID: 29709058 DOI: 10.1002/bem.22122] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 03/23/2018] [Indexed: 12/21/2022]
Abstract
Mitochondrion is the major cellular energy producing organelle that is at the boundary between chemical reactions and physical processes. Although mitochondria have been shown to be affected by physical methods such as nonthermal plasma, whether static magnetic field (SMF) could also affect them is still unclear. Here we used rat adrenal PC12 cells to compare SMFs of different intensities for their effects on ATP (adenosine-5'-triphosphate), the major energy source produced by mitochondria, which is essential for various cellular processes. Our results show that although 0.26 or 0.50 T SMFs did not affect ATP, 1 T and 9 T SMFs affected ATP level differently and time-dependently. Moreover, SMF-induced ATP level fluctuations are correlated with mitochondrial membrane potential changes. Our study provides insights not only into understanding various cellular effects of SMFs, but also the potential clinical applications of SMFs. Bioelectromagnetics. 39:352-360, 2018. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Dongmei Wang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.,University of Science and Technology of China, Hefei, China
| | - Ze Wang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.,University of Science and Technology of China, Hefei, China
| | - Lei Zhang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.,University of Science and Technology of China, Hefei, China
| | - Zhiyuan Li
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
| | - XiaoFei Tian
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.,University of Science and Technology of China, Hefei, China
| | - Jun Fang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.,Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, Hefei, China
| | - Qingyou Lu
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.,University of Science and Technology of China, Hefei, China.,Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, Hefei, China
| | - Xin Zhang
- High Magnetic Field Laboratory, Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China.,Institute of Physical Science and Information Technology, Anhui University, Hefei, China
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16
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Spyridopoulou K, Makridis A, Maniotis N, Karypidou N, Myrovali E, Samaras T, Angelakeris M, Chlichlia K, Kalogirou O. Effect of low frequency magnetic fields on the growth of MNP-treated HT29 colon cancer cells. NANOTECHNOLOGY 2018; 29:175101. [PMID: 29498936 DOI: 10.1088/1361-6528/aaaea9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Recent investigations have attempted to understand and exploit the impact of magnetic field-actuated internalized magnetic nanoparticles (MNPs) on the proliferation rate of cancer cells. Due to the complexity of the parameters governing magnetic field-exposure though, individual studies to date have raised contradictory results. In our approach we performed a comparative analysis of key parameters related to the cell exposure of cancer cells to magnetic field-actuated MNPs, and to the magnetic field, in order to better understand the factors affecting cellular responses to magnetic field-stimulated MNPs. We used magnetite MNPs with a hydrodynamic diameter of 100 nm and studied the proliferation rate of MNPs-treated versus untreated HT29 human colon cancer cells, exposed to either static or alternating low frequency magnetic fields with varying intensity (40-200 mT), frequency (0-8 Hz) and field gradient. All three parameters, field intensity, frequency, and field gradient affected the growth rate of cells, with or without internalized MNPs, as compared to control MNPs-untreated and magnetic field-untreated cells. We observed that the growth inhibitory effects induced by static and rotating magnetic fields were enhanced by pre-treating the cells with MNPs, while the growth promoting effects observed in alternating field-treated cells were weakened by MNPs. Compared to static, rotating magnetic fields of the same intensity induced a similar extend of cell growth inhibition, while alternating fields of varying intensity (70 or 100 mT) and frequency (0, 4 or 8 Hz) induced cell proliferation in a frequency-dependent manner. These results, highlighting the diverse effects of mode, intensity, and frequency of the magnetic field on cell growth, indicate that consistent and reproducible results can be achieved by controlling the complexity of the exposure of biological samples to MNPs and external magnetic fields, through monitoring crucial experimental parameters. We demonstrate that further research focusing on the accurate manipulation of the aforementioned magnetic field exposure parameters could lead to the development of successful non-invasive therapeutic anticancer approaches.
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Affiliation(s)
- K Spyridopoulou
- Department of Molecular Biology and Genetics, Democritus University of Thrace, 68100 Alexandroupolis, Greece
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17
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Magnetic hydrogels for levodopa release and cell stimulation triggered by external magnetic field. Colloids Surf B Biointerfaces 2018; 167:415-424. [PMID: 29704742 DOI: 10.1016/j.colsurfb.2018.04.040] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 04/10/2018] [Accepted: 04/20/2018] [Indexed: 12/15/2022]
Abstract
Magnetic responsive hydrogels composed of alginate (Alg) and xanthan gum (XG), crosslinked with Ca2+ ions, were modified by in situ magnetic nanoparticles (MNP) formation. In comparison to magnetic Alg hydrogels, magnetic Alg-XG hydrogels presented superior mechanical and swelling properties, due to the high charge density and molecular weight of XG. The loading efficiency of levodopa (LD), an important antiparkinson drug, in the Alg-XG/MNP hydrogels was the highest (64%), followed by Alg/MNP (56%), Alg-XG (53%) and Alg (28%). A static external magnetic field (EMF) of 0.4 T stimulated the release of LD from Alg-XG/MNP hydrogels achieving 64 ± 6% of the initial loading after 30 h. The viability, proliferation and expression of dopaminergic markers of human neuroblastoma SH-SY5Y cell on the LD loaded magnetic hydrogels were successful, particularly under EMF, which stimulated the release of LD. Overall, the results of this study provided the rational design of magnetic hydrogels for the delivery of drugs, which combined with external magnetic stimulus, might improve cell proliferation and specific differentiation.
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18
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Cell type- and density-dependent effect of 1 T static magnetic field on cell proliferation. Oncotarget 2017; 8:13126-13141. [PMID: 28061454 PMCID: PMC5355082 DOI: 10.18632/oncotarget.14480] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Accepted: 12/13/2016] [Indexed: 11/29/2022] Open
Abstract
Increasing evidence shows that static magnetic fields (SMFs) can affect cell proliferation but mixed results have been reported. Here we systematically examined the effects of 1 T (Tesla) SMF, which is close to the SMF intensity that patients are exposed to MRI (magnetic resonance imaging) scanners in hospitals, for its effect on 15 different cell lines, including 12 human and 3 rodent cell lines. Our results show that 1 T SMF does not have apparent impact on cell cycle or cell death. However, at higher cell density, it reduced cell numbers in six out of seven solid human cancer cell lines. We found that both cell type and cell density had evident impacts on SMF effects. Moreover, the EGFR-Akt-mTOR pathway, which varies significantly between different cell types and densities, contributes to the differential effects of SMF. In addition, SMF also increases the efficacy of Akt inhibitors on cancer cell growth inhibition. Therefore 1 T SMF affects cell proliferation in a cell type- and cell density-dependent manner, and the inhibition effect of 1 T SMF on multiple cancer cells at higher cell density may indicate its clinical potential in late stage cancer therapy.
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19
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D'Amora U, Russo T, Gloria A, Rivieccio V, D'Antò V, Negri G, Ambrosio L, De Santis R. 3D additive-manufactured nanocomposite magnetic scaffolds: Effect of the application mode of a time-dependent magnetic field on hMSCs behavior. Bioact Mater 2017; 2:138-145. [PMID: 29744423 PMCID: PMC5935178 DOI: 10.1016/j.bioactmat.2017.04.003] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 04/10/2017] [Accepted: 04/12/2017] [Indexed: 01/15/2023] Open
Abstract
Over the past few years, the influence of static or dynamic magnetic fields on biological systems has become a topic of considerable interest. Magnetism has recently been implicated to play significant roles in the regulation of cell responses and, for this reason, it is revolutionizing many aspects of healthcare, also suggesting new opportunities in tissue engineering. The aim of the present study was to analyze the effect of the application mode of a time-dependent magnetic field on the behavior of human mesenchymal stem cells (hMSCs) seeded on 3D additive-manufactured poly(ɛ-caprolactone)/iron-doped hydroxyapatite (PCL/FeHA) nanocomposite scaffolds. Additive Manufacturing for bone tissue engineering. Analysis of the effect of the application mode of a time-dependent magnetic field on the cell-behavior. 3D nanocomposite magnetic scaffolds.
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Affiliation(s)
- Ugo D'Amora
- Institute of Polymers, Composites and Biomaterials, National Research Council, Naples, Italy
| | - Teresa Russo
- Institute of Polymers, Composites and Biomaterials, National Research Council, Naples, Italy
| | - Antonio Gloria
- Institute of Polymers, Composites and Biomaterials, National Research Council, Naples, Italy
| | | | - Vincenzo D'Antò
- Department of Neuroscience, Reproductive Sciences and Oral Sciences, University of Naples Federico II, Naples, Italy.,Unit of Dentistry, Bambino Gesù Children's Hospital, IRCCS, Rome, Italy
| | | | - Luigi Ambrosio
- Institute of Polymers, Composites and Biomaterials, National Research Council, Naples, Italy
| | - Roberto De Santis
- Institute of Polymers, Composites and Biomaterials, National Research Council, Naples, Italy
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20
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Lew WZ, Huang YC, Huang KY, Lin CT, Tsai MT, Huang HM. Static magnetic fields enhance dental pulp stem cell proliferation by activating the p38 mitogen-activated protein kinase pathway as its putative mechanism. J Tissue Eng Regen Med 2017; 12:19-29. [PMID: 27688068 DOI: 10.1002/term.2333] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 08/02/2016] [Accepted: 09/26/2016] [Indexed: 01/09/2023]
Abstract
Dental pulp stem cells (DPSCs) can be a potential stem cell resource for clinical cell therapy and tissue engineering. However, obtaining a sufficient number of DPSCs for repairing defects is still an issue in clinical applications. Static magnetic fields (SMFs) enhance the proliferation of several cell types. Whether or not SMFs have a positive effect on DPSC proliferation is unknown. Therefore, the aim of this study was to investigate the effect of SMFs on DPSC proliferation and its possible intracellular mechanism of action. For methodology, isolated DPSCs were cultured with a 0.4-T SMF. Anisotropy of the lipid bilayer was examined using a fluorescence polarization-depolarization assay. The intracellular calcium ions of the SMF-treated cells were analysed using Fura-2 acetoxymethyl ester labelling. The cytoskeletons of exposed and unexposed control cells were labelled with actin fluorescence dyes. Cell viability was checked when the tested cells were cultured with inhibitors of ERK, JNK and p38 to discern the possible signalling cascade involved in the proliferative effect of the SMF on the DPSCs. Our results showed that SMF-treated cells demonstrated a higher proliferation rate and anisotropy value. The intracellular calcium ions were activated by SMFs. In addition, fluorescence microscopy images demonstrated that SMF-treated cells exhibit higher fluorescence intensity of the actin cytoskeletal structure. Cell viability and real-time polymerase chain reaction suggested that the p38 signalling cascade was activated when the DPSCs were exposed to a 0.4-T SMF. F-actin intensity tests showed that SB203580-treated cells decreased even with SMF exposure. Additionally, the F-/G-actin ratio increased due to slowing of the cytoskeleton reorganization by p38 mitogen-activated protein kinase inhibition. According to these results, we suggest that a 0.4-T SMF affected the cellular membranes of the DPSCs and activated intracellular calcium ions. This effect may activate p38 mitogen-activated protein kinase signalling, and thus reorganize the cytoskeleton, which contributes to the increased cell proliferation of the DPSCs. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Wei-Zhen Lew
- School of Dentistry, Taipei Medical University, Taipei, Taiwan
| | - Yu-Chih Huang
- School of Dentistry, Taipei Medical University, Taipei, Taiwan
| | - Kuen-Yu Huang
- Graduate Institute of Biomedical Materials and Tissue Engineering, Taipei Medical University, Taipei, Taiwan
| | - Che-Tong Lin
- School of Dentistry, Taipei Medical University, Taipei, Taiwan
| | - Ming-Tzu Tsai
- Department of Biomedical Engineering, Hungkuang University, Taichung, Taiwan
| | - Haw-Ming Huang
- School of Dentistry, Taipei Medical University, Taipei, Taiwan.,Graduate Institute of Biomedical Materials and Tissue Engineering, Taipei Medical University, Taipei, Taiwan
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21
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Vincenzi F, Ravani A, Pasquini S, Merighi S, Gessi S, Setti S, Cadossi R, Borea PA, Varani K. Pulsed Electromagnetic Field Exposure Reduces Hypoxia and Inflammation Damage in Neuron-Like and Microglial Cells. J Cell Physiol 2016; 232:1200-1208. [PMID: 27639248 DOI: 10.1002/jcp.25606] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 09/14/2016] [Indexed: 12/11/2022]
Abstract
In the present study, the effect of low-frequency, low-energy pulsed electromagnetic fields (PEMFs) has been investigated by using different cell lines derived from neuron-like cells and microglial cells. In particular, the primary aim was to evaluate the effect of PEMF exposure in inflammation- and hypoxia-induced injury in two different neuronal cell models, the human neuroblastoma-derived SH-SY5Y cells and rat pheochromocytoma PC12 cells and in N9 microglial cells. In neuron-like cells, live/dead and apoptosis assays were performed in hypoxia conditions from 2 to 48 h. Interestingly, PEMF exposure counteracted hypoxia damage significantly reducing cell death and apoptosis. In the same cell lines, PEMFs inhibited the activation of the hypoxia-inducible factor 1α (HIF-1α), the master transcriptional regulator of cellular response to hypoxia. The effect of PEMF exposure on reactive oxygen species (ROS) production in both neuron-like and microglial cells was investigated considering their key role in ischemic injury. PEMFs significantly decreased hypoxia-induced ROS generation in PC12, SH-SY5Y, and N9 cells after 24 or 48 h of incubation. Moreover, PEMFs were able to reduce some of the most well-known pro-inflammatory cytokines such as tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, IL-6, and IL-8 release in N9 microglial cells stimulated with different concentrations of LPS for 24 or 48 h of incubation time. These results show a protective effect of PEMFs on hypoxia damage in neuron-like cells and an anti-inflammatory effect in microglial cells suggesting that PEMFs could represent a potential therapeutic approach in cerebral ischemic conditions. J. Cell. Physiol. 232: 1200-1208, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Fabrizio Vincenzi
- Department of Medical Sciences, Institute of Pharmacology, University of Ferrara, Ferrara, Italy
| | - Annalisa Ravani
- Department of Medical Sciences, Institute of Pharmacology, University of Ferrara, Ferrara, Italy
| | - Silvia Pasquini
- Department of Medical Sciences, Institute of Pharmacology, University of Ferrara, Ferrara, Italy
| | - Stefania Merighi
- Department of Medical Sciences, Institute of Pharmacology, University of Ferrara, Ferrara, Italy
| | - Stefania Gessi
- Department of Medical Sciences, Institute of Pharmacology, University of Ferrara, Ferrara, Italy
| | | | | | - Pier Andrea Borea
- Department of Medical Sciences, Institute of Pharmacology, University of Ferrara, Ferrara, Italy
| | - Katia Varani
- Department of Medical Sciences, Institute of Pharmacology, University of Ferrara, Ferrara, Italy
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22
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Kesić S, Spasić SZ. Application of Higuchi's fractal dimension from basic to clinical neurophysiology: A review. COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2016; 133:55-70. [PMID: 27393800 DOI: 10.1016/j.cmpb.2016.05.014] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 03/24/2016] [Accepted: 05/27/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND AND OBJECTIVE For more than 20 years, Higuchi's fractal dimension (HFD), as a nonlinear method, has occupied an important place in the analysis of biological signals. The use of HFD has evolved from EEG and single neuron activity analysis to the most recent application in automated assessments of different clinical conditions. Our objective is to provide an updated review of the HFD method applied in basic and clinical neurophysiological research. METHODS This article summarizes and critically reviews a broad literature and major findings concerning the applications of HFD for measuring the complexity of neuronal activity during different neurophysiological conditions. The source of information used in this review comes from the PubMed, Scopus, Google Scholar and IEEE Xplore Digital Library databases. RESULTS The review process substantiated the significance, advantages and shortcomings of HFD application within all key areas of basic and clinical neurophysiology. Therefore, the paper discusses HFD application alone, combined with other linear or nonlinear measures, or as a part of automated methods for analyzing neurophysiological signals. CONCLUSIONS The speed, accuracy and cost of applying the HFD method for research and medical diagnosis make it stand out from the widely used linear methods. However, only a combination of HFD with other nonlinear methods ensures reliable and accurate analysis of a wide range of neurophysiological signals.
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Affiliation(s)
- Srdjan Kesić
- University of Belgrade, Institute for Biological Research "Siniša Stanković", Department of Neurophysiology, Bulevar Despota Stefana 142, 11060 Belgrade, Serbia
| | - Sladjana Z Spasić
- University of Belgrade, Institute for Multidisciplinary Research, Department of Life Sciences, Kneza Višeslava 1, 11030 Belgrade, Serbia; Singidunum University, Danijelova 32, 11010 Belgrade, Serbia.
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23
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Kumar S, Dey S, Jain S. Extremely low-frequency electromagnetic fields: A possible non-invasive therapeutic tool for spinal cord injury rehabilitation. Electromagn Biol Med 2016; 36:88-101. [PMID: 27399648 DOI: 10.1080/15368378.2016.1194290] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Traumatic insults to the spinal cord induce both immediate mechanical damage and subsequent tissue degeneration. The latter involves a range of events namely cellular disturbance, homeostatic imbalance, ionic and neurotransmitters derangement that ultimately result in loss of sensorimotor functions. The targets for improving function after spinal cord injury (SCI) are mainly directed toward limiting these secondary injury events. Extremely low-frequency electromagnetic field (ELF-EMF) is a possible non-invasive therapeutic intervention for SCI rehabilitation which has the potential to constrain the secondary injury-induced events. In the present review, we discuss the effects of ELF-EMF on experimental and clinical SCI as well as on biological system.
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Affiliation(s)
- Suneel Kumar
- a Department of Physiology , All India Institute of Medical Sciences , New Delhi , India.,b W. M. Keck Center for Collaborative Neuroscience, Rutgers, The State University of New Jersey , Piscataway , NJ , USA
| | - Soumil Dey
- a Department of Physiology , All India Institute of Medical Sciences , New Delhi , India
| | - Suman Jain
- a Department of Physiology , All India Institute of Medical Sciences , New Delhi , India
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24
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Vadalà M, Vallelunga A, Palmieri L, Palmieri B, Morales-Medina JC, Iannitti T. Mechanisms and therapeutic applications of electromagnetic therapy in Parkinson's disease. BEHAVIORAL AND BRAIN FUNCTIONS : BBF 2015; 11:26. [PMID: 26347217 PMCID: PMC4562205 DOI: 10.1186/s12993-015-0070-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 07/22/2015] [Indexed: 12/04/2022]
Abstract
Electromagnetic therapy is a non-invasive and safe approach for the management of several pathological conditions including neurodegenerative diseases. Parkinson's disease is a neurodegenerative pathology caused by abnormal degeneration of dopaminergic neurons in the ventral tegmental area and substantia nigra pars compacta in the midbrain resulting in damage to the basal ganglia. Electromagnetic therapy has been extensively used in the clinical setting in the form of transcranial magnetic stimulation, repetitive transcranial magnetic stimulation, high-frequency transcranial magnetic stimulation and pulsed electromagnetic field therapy which can also be used in the domestic setting. In this review, we discuss the mechanisms and therapeutic applications of electromagnetic therapy to alleviate motor and non-motor deficits that characterize Parkinson's disease.
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Affiliation(s)
- Maria Vadalà
- Department of General Surgery and Surgical Specialties, University of Modena and Reggio Emilia Medical School, Surgical Clinic, Modena, Italy.
| | - Annamaria Vallelunga
- Department of Medicine and Surgery, Centre for Neurodegenerative Diseases (CEMAND), University of Salerno, Salerno, Italy.
| | - Lucia Palmieri
- Department of Nephrology, University of Modena and Reggio Emilia Medical School, Surgical Clinic, Modena, Italy.
| | - Beniamino Palmieri
- Department of General Surgery and Surgical Specialties, University of Modena and Reggio Emilia Medical School, Surgical Clinic, Modena, Italy.
| | - Julio Cesar Morales-Medina
- Centro de Investigación en Reproducción Animal, CINVESTAV-Universidad Autónoma de Tlaxcala, Tlaxcala, Mexico.
| | - Tommaso Iannitti
- Department of Neuroscience, Sheffield Institute for Translational Neuroscience (SITraN), University of Sheffield, Sheffield, UK.
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25
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Van der Schyf CJ. Rational drug discovery design approaches for treating Parkinson’s disease. Expert Opin Drug Discov 2015; 10:713-41. [DOI: 10.1517/17460441.2015.1041495] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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26
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LI YONG, LIU XIAOHONG, HUANG SHOUYUE, HUANG PING, ZHONG YISHENG. Effect of SCH442416 on glutamate uptake in retinal Müller cells at increased hydrostatic pressure. Mol Med Rep 2015; 12:3993-3998. [DOI: 10.3892/mmr.2015.3882] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 05/13/2015] [Indexed: 11/05/2022] Open
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27
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Spasić S, Kesić S, Stojadinović G, Petković B, Todorović D. Effects of the static and ELF magnetic fields on the neuronal population activity in Morimus funereus (Coleoptera, Cerambycidae) antennal lobe revealed by wavelet analysis. Comp Biochem Physiol A Mol Integr Physiol 2015; 181:27-35. [DOI: 10.1016/j.cbpa.2014.11.018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 11/19/2014] [Accepted: 11/20/2014] [Indexed: 12/21/2022]
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28
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Aguila J, Cudeiro J, Rivadulla C. Effects of Static Magnetic Fields on the Visual Cortex: reversible Visual Deficits and Reduction of Neuronal Activity. Cereb Cortex 2014; 26:628-638. [PMID: 25260705 DOI: 10.1093/cercor/bhu228] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Noninvasive brain stimulation techniques have been successfully used to modulate brain activity, have become a highly useful tool in basic and clinical research and, recently, have attracted increased attention due to their putative use as a method for neuro-enhancement. In this scenario, transcranial static magnetic stimulation (SMS) of moderate strength might represent an affordable, simple, and complementary method to other procedures, such as Transcranial Magnetic Stimulation or direct current stimulation, but its mechanisms and effects are not thoroughly understood. In this study, we show that static magnetic fields applied to visual cortex of awake primates cause reversible deficits in a visual detection task. Complementary experiments in anesthetized cats show that the visual deficits are a consequence of a strong reduction in neural activity. These results demonstrate that SMS is able to effectively modulate neuronal activity and could be considered to be a tool to be used for different purposes ranging from experimental studies to clinical applications.
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Affiliation(s)
- Jordi Aguila
- Neuroscience and Motor Control Group, NEUROcom, Department of Medicine, University of Coruna and Biomedical Research Institute of A Coruna (INIBIC), Campus de Oza, 15006 Coruña, Spain
| | - Javier Cudeiro
- Neuroscience and Motor Control Group, NEUROcom, Department of Medicine, University of Coruna and Biomedical Research Institute of A Coruna (INIBIC), Campus de Oza, 15006 Coruña, Spain
| | - Casto Rivadulla
- Neuroscience and Motor Control Group, NEUROcom, Department of Medicine, University of Coruna and Biomedical Research Institute of A Coruna (INIBIC), Campus de Oza, 15006 Coruña, Spain
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Ben Yakir-Blumkin M, Loboda Y, Schächter L, Finberg JPM. Neuroprotective effect of weak static magnetic fields in primary neuronal cultures. Neuroscience 2014; 278:313-26. [PMID: 25171788 DOI: 10.1016/j.neuroscience.2014.08.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 08/13/2014] [Accepted: 08/19/2014] [Indexed: 12/20/2022]
Abstract
Low intensity static magnetic fields (SMFs) interact with various biological tissues including the CNS, thereby affecting key biological processes such as gene expression, cell proliferation and differentiation, as well as apoptosis. Previous studies describing the effect of SMFs on apoptotic cell death in several non-neuronal cell lines, emphasize the importance of such a potential modulation in the case of neurodegenerative disorders, where apoptosis constitutes a major route via which neurons degenerate and die. In this study, we examine the effect of SMFs on neuronal survival in primary cortical and hippocampal neurons that constitute a suitable experimental system for modeling the neurodegenerative state in vitro. We show that weak SMF exposure interferes with the apoptotic programing in rat primary cortical and hippocampal neurons, thereby providing protection against etoposide-induced apoptosis in a dose- and time-dependent manner. Primary cortical neurons exposed to SMF (50G) for 7days exhibited a 57.1±6.3% decrease in the percentage of cells undergoing apoptosis induced by etoposide (12μM), accompanied by a marked decrease in the expression of the pro-apoptotic markers: cleaved poly ADP ribose polymerase-1, cleaved caspase-3, active caspase-9 and the phospho-histone H2A variant (Ser139) by 41.0±5.0%, 81.2±5.0%, 72.9±6.4%, 42.75±2.9%, respectively, and by a 57.2±1.0% decrease in the extent of mitochondrial membrane potential collapse. Using the L-type voltage-gated Ca(2+) channel inhibitor nifedipine, which is selective to Ca(2+) influx through Cav1.2, we found that the anti-apoptotic effect of SMFs was mediated by Ca(2+) influx through these channels. Our findings demonstrating altered Ca(2+)-influx in response to thapsigargin stimulation in SMF-exposed cortical neurons, along with enhanced inhibition of KCl-induced Ca(2+)-influx through Cav1.2 channels and enhanced expression of Cav1.2 and Cav1.3 channels, allude to the involvement of voltage- and store-operated Ca(2+) channels in various aspects of the protective effect exerted by SMFs. These findings show the potential susceptibility of the CNS to weak SMF exposure and have implications for the design of novel strategies for the treatment and/or prevention of neurodegenerative diseases.
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Affiliation(s)
- M Ben Yakir-Blumkin
- Department of Molecular Pharmacology, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, 31096 Haifa, Israel.
| | - Y Loboda
- Department of Molecular Pharmacology, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, 31096 Haifa, Israel.
| | - L Schächter
- Faculty of Electrical Engineering, Technion - Israel Institute of Technology, 32000 Haifa, Israel.
| | - J P M Finberg
- Department of Molecular Pharmacology, Rappaport Faculty of Medicine, Technion - Israel Institute of Technology, 31096 Haifa, Israel.
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Zhang X, Fu L, Geng Y, Zhai X, Liu Y. Analysis of the effect of repeated-pulse transcranial magnetic stimulation at the Guangming point on electroencephalograms. Neural Regen Res 2014; 9:549-54. [PMID: 25206853 PMCID: PMC4153505 DOI: 10.4103/1673-5374.130082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/19/2014] [Indexed: 02/01/2023] Open
Abstract
Here, we administered repeated-pulse transcranial magnetic stimulation to healthy people at the left Guangming (GB37) and a mock point, and calculated the sample entropy of electroencephalo-gram signals using nonlinear dynamics. Additionally, we compared electroencephalogram sample entropy of signals in response to visual stimulation before, during, and after repeated-pulse tran-scranial magnetic stimulation at the Guangming. Results showed that electroencephalogram sample entropy at left (F3) and right (FP2) frontal electrodes were significantly different depending on where the magnetic stimulation was administered. Additionally, compared with the mock point, electroencephalogram sample entropy was higher after stimulating the Guangming point. When visual stimulation at Guangming was given before repeated-pulse transcranial magnetic stimula-tion, significant differences in sample entropy were found at five electrodes (C3, Cz, C4, P3, T8) in parietal cortex, the central gyrus, and the right temporal region compared with when it was given after repeated-pulse transcranial magnetic stimulation, indicating that repeated-pulse transcranial magnetic stimulation at Guangming can affect visual function. Analysis of electroencephalogram revealed that when visual stimulation preceded repeated pulse transcranial magnetic stimulation, sample entropy values were higher at the C3, C4, and P3 electrodes and lower at the Cz and T8 electrodes than visual stimulation followed preceded repeated pulse transcranial magnetic stimula-tion. The findings indicate that repeated-pulse transcranial magnetic stimulation at the Guangming evokes different patterns of electroencephalogram signals than repeated-pulse transcranial mag-netic stimulation at other nearby points on the body surface, and that repeated-pulse transcranial magnetic stimulation at the Guangming is associated with changes in the complexity of visually evoked electroencephalogram signals in parietal regions, central gyrus, and temporal regions.
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Affiliation(s)
- Xin Zhang
- Tianjin Polytechnic University, Tianjin, China
| | - Lingdi Fu
- Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin, China
| | - Yuehua Geng
- Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability, Hebei University of Technology, Tianjin, China
| | - Xiang Zhai
- Department of Otorhinolaryngology, Tianjin Huanhu Hospital, Tianjin, China
| | - Yanhua Liu
- Hebei College of Industry and Technology, Shijiazhuang, Hebei Province, China
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31
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Yu S, Shang P. A review of bioeffects of static magnetic field on rodent models. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2014; 114:14-24. [DOI: 10.1016/j.pbiomolbio.2013.11.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2013] [Revised: 10/30/2013] [Accepted: 11/05/2013] [Indexed: 01/11/2023]
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Du J, Tan E, Kim HJ, Zhang A, Bhattacharya R, Yarema KJ. Comparative evaluation of chitosan, cellulose acetate, and polyethersulfone nanofiber scaffolds for neural differentiation. Carbohydr Polym 2013; 99:483-90. [PMID: 24274534 DOI: 10.1016/j.carbpol.2013.08.050] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 07/31/2013] [Accepted: 08/20/2013] [Indexed: 12/29/2022]
Abstract
Based on accumulating evidence that the 3D topography and the chemical features of a growth surface influence neuronal differentiation, we combined these two features by evaluating the cytotoxicity, proliferation, and differentiation of the rat PC12 line and human neural stem cells (hNSCs) on chitosan (CS), cellulose acetate (CA), and polyethersulfone (PES)-derived electrospun nanofibers that had similar diameters, centered in the 200-500 nm range. None of the nanofibrous materials were cytotoxic compared to 2D (e.g., flat surface) controls; however, proliferation generally was inhibited on the nanofibrous scaffolds although to a lesser extent on the polysaccharide-derived materials compared to PES. In an exception to the trend toward slower growth on the 3D substrates, hNSCs differentiated on the CS nanofibers proliferated faster than the 2D controls and both cell types showed enhanced indication of neuronal differentiation on the CS scaffolds. Together, these results demonstrate beneficial attributes of CS for neural tissue engineering when this polysaccharide is used in the context of the defined 3D topography found in electrospun nanofibers.
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Affiliation(s)
- Jian Du
- Department of Biomedical Engineering and the Translational Tissue Engineering Center, The Johns Hopkins University, Baltimore, MD, USA
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33
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Nikolić L, Bataveljić D, Andjus PR, Nedeljković M, Todorović D, Janać B. Changes in the expression and current of the Na+/K+ pump in the snail nervous system after exposure to a static magnetic field. ACTA ACUST UNITED AC 2013; 216:3531-41. [PMID: 23788713 DOI: 10.1242/jeb.085332] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Compelling evidence supports the use of a moderate static magnetic field (SMF) for therapeutic purposes. In order to provide insight into the mechanisms underlying SMF treatment, it is essential to examine the cellular responses elicited by therapeutically applied SMF, especially in the nervous system. The Na(+)/K(+) pump, by creating and maintaining the gradient of Na(+) and K(+) ions across the plasma membrane, regulates the physiological properties of neurons. In this study, we examined the expression of the Na(+)/K(+) pump in the isolated brain-subesophageal ganglion complex of the garden snail Helix pomatia, along with the immunoreactivity and current of the Na(+)/K(+) pump in isolated snail neurons after 15 min exposure to a moderate (10 mT) SMF. Western blot and immunofluorescence analysis revealed that 10 mT SMF did not significantly change the expression of the Na(+)/K(+) pump α-subunit in the snail brain and the neuronal cell body. However, our immunofluorescence data showed that SMF treatment induced a significant increase in the Na(+)/K(+) pump α-subunit expression in the neuronal plasma membrane area. This change in Na(+)/K(+) pump expression was reflected in pump activity as demonstrated by the pump current measurements. Whole-cell patch-clamp recordings from isolated snail neurons revealed that Na(+)/K(+) pump current density was significantly increased after the 10 mT SMF treatment. The SMF-induced increase was different in the two groups of control snail neurons, as defined by the pump current level. The results obtained could represent a physiologically important response of neurons to 10 mT SMF comparable in strength to therapeutic applications.
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Affiliation(s)
- Ljiljana Nikolić
- Department of Neurophysiology, Institute for Biological Research Sinisa Stankovic, University of Belgrade, Bulevar Despota Stefana 142, Belgrade, Serbia.
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34
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Shen LK, Huang HM, Yang PC, Huang YK, Wang PDY, Leung TK, Chen CJ, Chang WJ. A static magnetic field attenuates lipopolysaccharide-induced neuro-inflammatory response via IL-6-mediated pathway. Electromagn Biol Med 2013; 33:132-8. [PMID: 23781996 DOI: 10.3109/15368378.2013.794734] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
An effective method for controlling brain damage and neurodegeneration caused by inflammation remains elusive. Down-expression of the lipopolysaccharide (LPS)-induced inflammatory cytokines resulting in endotoxin tolerance is reported as an alternative anti-infection treatment. Nonetheless, because the dosage and action site are hard to control, endotoxin tolerance caused by low-dose LPS injection in brain tissue may induce side effects. The aim of this study was to test the hypothesis that static magnetic fields (SMF) stimulate endotoxin tolerance in brain tissue. In this study, survival rate and pathological changes in brain tissues of LPS-challenged mice were examined with and without SMF treatment. In addition, the effects of SMF exposure on growth rate and cytokine expression of LPS-challenged BV-2 microglia cells were monitored. Our results showed that SMF pre-exposure had positive effects on the survival rate and histological outcomes of LPS-treated mice. Furthermore, SMF exposure significantly decreased IL-6 expression in BV-2 cells (p < 0.05) by a phenomenon similar to endotoxin tolerance. We suggest that SMF has potential as an alternative simulation source for controlling LPS-induced excess neuro-inflammatory response.
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Affiliation(s)
- Li-Kuo Shen
- Department of Radiology, Shuang Ho Hospital, Taipei Medical University , New Taipei City , Taiwan
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35
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Novel Mechanisms Underlying Inhibitory and Facilitatory Transcranial Magnetic Stimulation Abnormalities in Parkinson's Disease. Arch Med Res 2013; 44:221-8. [DOI: 10.1016/j.arcmed.2013.03.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Accepted: 03/05/2013] [Indexed: 12/31/2022]
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36
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Gmitrov J. Static magnetic field effect on microcirculation, direct versus baroreflex-mediated approach. Electromagn Biol Med 2013; 32:448-62. [DOI: 10.3109/15368378.2012.743905] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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37
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Vincenzi F, Targa M, Corciulo C, Gessi S, Merighi S, Setti S, Cadossi R, Borea PA, Varani K. The anti-tumor effect of A3 adenosine receptors is potentiated by pulsed electromagnetic fields in cultured neural cancer cells. PLoS One 2012; 7:e39317. [PMID: 22761760 PMCID: PMC3382599 DOI: 10.1371/journal.pone.0039317] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 05/23/2012] [Indexed: 01/17/2023] Open
Abstract
A3 adenosine receptors (ARs) play a pivotal role in the development of cancer and their activation is involved in the inhibition of tumor growth. The effects of pulsed electromagnetic fields (PEMFs) on cancer have been controversially discussed and the detailed mechanisms are not yet fully understood. In the past we have demonstrated that PEMFs increased A2A and A3AR density and functionality in human neutrophils, human and bovine synoviocytes, and bovine chondrocytes. In the same cells, PEMF exposure increased the anti-inflammatory effect mediated by A2A and/or A3ARs. The primary aim of the present study was to evaluate if PEMF exposure potentiated the anti-tumor effect of A3ARs in PC12 rat adrenal pheochromocytoma and U87MG human glioblastoma cell lines in comparison with rat cortical neurons. Saturation binding assays and mRNA analysis revealed that PEMF exposure up-regulated A2A and A3ARs that are well coupled to adenylate cyclase activity and cAMP production. The activation of A2A and A3ARs resulted in the decrease of nuclear factor-kappa B (NF-kB) levels in tumor cells, whilst only A3ARs are involved in the increase of p53 expression. A3AR stimulation mediated an inhibition of tumor cell proliferation evaluated by thymidine incorporation. An increase of cytotoxicity by lactate dehydrogenase (LDH) release and apoptosis by caspase-3 activation in PC12 and U87MG cells, but not in cortical neurons, was observed following A3AR activation. The effect of the A3AR agonist in tumor cells was enhanced in the presence of PEMFs and blocked by using a well-known selective antagonist. Together these results demonstrated that PEMF exposure significantly increases the anti-tumor effect modulated by A3ARs.
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Affiliation(s)
- Fabrizio Vincenzi
- Department of Clinical and Experimental Medicine, Pharmacology Unit, University of Ferrara, Ferrara, Italy
| | - Martina Targa
- Department of Clinical and Experimental Medicine, Pharmacology Unit, University of Ferrara, Ferrara, Italy
| | - Carmen Corciulo
- Department of Clinical and Experimental Medicine, Pharmacology Unit, University of Ferrara, Ferrara, Italy
| | - Stefania Gessi
- Department of Clinical and Experimental Medicine, Pharmacology Unit, University of Ferrara, Ferrara, Italy
| | - Stefania Merighi
- Department of Clinical and Experimental Medicine, Pharmacology Unit, University of Ferrara, Ferrara, Italy
| | | | | | - Pier Andrea Borea
- Department of Clinical and Experimental Medicine, Pharmacology Unit, University of Ferrara, Ferrara, Italy
| | - Katia Varani
- Department of Clinical and Experimental Medicine, Pharmacology Unit, University of Ferrara, Ferrara, Italy
- * E-mail:
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38
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Leon-Sarmiento FE, Rizzo-Sierra CV, Bayona EA, Bayona-Prieto J, Bara-Jimenez W. WITHDRAWN: Mechanisms Underlying Inhibitory and Facilitatory Transcranial Magnetic Stimulation Abnormalities in a Large Sample of Patients with Parkinson's Disease. Arch Med Res 2012:S0188-4409(12)00158-0. [PMID: 22721866 DOI: 10.1016/j.arcmed.2012.06.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 05/24/2012] [Indexed: 10/28/2022]
Abstract
This article has been withdrawn at the request of the author(s) and/or editor. The Publisher apologizes for any inconvenience this may cause. The full Elsevier Policy on Article Withdrawal can be found at http://www.elsevier.com/locate/withdrawalpolicy.
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Affiliation(s)
- Fidias E Leon-Sarmiento
- Smell and Taste Center, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Otorhinolaryngology: Head and Neck Surgery, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Unit of Parkinson and Movement Disorders, Mediciencias Research Group, Universidad Nacional/Ramon and Cajal Panamerican Health Foundation, Bogota, Colombia
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39
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Nikolić L, Todorović N, Zakrzewska J, Stanić M, Rauš S, Kalauzi A, Janać B. Involvement of Na+/K+ pump in fine modulation of bursting activity of the snail Br neuron by 10 mT static magnetic field. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2012; 198:525-40. [PMID: 22534773 DOI: 10.1007/s00359-012-0727-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 04/06/2012] [Accepted: 04/07/2012] [Indexed: 01/17/2023]
Abstract
The spontaneously active Br neuron from the brain-subesophageal ganglion complex of the garden snail Helix pomatia rhythmically generates regular bursts of action potentials with quiescent intervals accompanied by slow oscillations of membrane potential. We examined the involvement of the Na(+)/K(+) pump in modulating its bursting activity by applying a static magnetic field. Whole snail brains and Br neuron were exposed to the 10-mT static magnetic field for 15 min. Biochemical data showed that Na(+)/K(+)-ATPase activity increased almost twofold after exposure of snail brains to the static magnetic field. Similarly, (31)P NMR data revealed a trend of increasing ATP consumption and increase in intracellular pH mediated by the Na(+)/H(+) exchanger in snail brains exposed to the static magnetic field. Importantly, current clamp recordings from the Br neuron confirmed the increase in activity of the Na(+)/K(+) pump after exposure to the static magnetic field, as the magnitude of ouabain's effect measured on the membrane resting potential, action potential, and interspike interval duration was higher in neurons exposed to the magnetic field. Metabolic pathways through which the magnetic field influenced the Na(+)/K(+) pump could involve phosphorylation and dephosphorylation, as blocking these processes abolished the effect of the static magnetic field.
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Affiliation(s)
- Ljiljana Nikolić
- Department of Neurophysiology, Institute for Biological Research Siniša Stanković, University of Belgrade, Bulevar Despota Stefana 142, Belgrade, Serbia.
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40
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Yu J, Chen C, Wang J, Cheng Y, Wu Q, Zhong Y, Shen X. In vitro effect of adenosine on the mRNA expression of Kir 2.1 and Kir 4.1 channels in rat retinal Müller cells at elevated hydrostatic pressure. Exp Ther Med 2012; 3:617-620. [PMID: 22969939 DOI: 10.3892/etm.2012.457] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2011] [Accepted: 01/11/2012] [Indexed: 01/15/2023] Open
Abstract
The aim of this study was to investigate the expression of Kir 2.1 and Kir 4.1 channels at an elevated hydrostatic pressure in vitro, and to determine whether adenosine may modulate the mRNA expression of Kir 2.1 and Kir 4.1 channels in retinal Müller cells at an elevated hydrostatic pressure in vitro. Müller cells treated with 1 μM adenosine at 40 mmHg/24 h, and mRNA expression of Kir 2.1 and Kir 4.1 channels were examined using real-time PCR. Müller cells significantly increased the mRNA expression of Kir 2.1 and Kir 4.1 channels at 40 mmHg/24 h. When further treated with 1 μM adenosine at 40 mmHg/24 h, the mRNA expression of the Kir 2.1 channels decreased, while the mRNA expression of the Kir 4.1 channels continued to increase. When the pressure was elevated, Müller cells were still able to take up K(+) and mediate the potassium concentration of the retina. Adenosine upregulated the expression of the Kir 4.1 channels, but weakly affected the expression of the Kir 2.1 channels.
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Affiliation(s)
- Jun Yu
- Department of Ophthalmology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200025
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41
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Activation of adenosine A2A receptor up-regulates BDNF expression in rat primary cortical neurons. Neurochem Res 2011; 36:2259-69. [PMID: 21792677 DOI: 10.1007/s11064-011-0550-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 06/18/2011] [Accepted: 07/14/2011] [Indexed: 01/12/2023]
Abstract
As a member of neurotrophin family, brain derived neurotrophic factor (BDNF) plays critical roles in neuronal development, differentiation, synaptogenesis, and neural protection from the harmful stimuli. There have been reported that adenosine A2(A) receptor subtype is widely distributed in the brain regions, such as hippocampus, striatum, and cortex. Adenosine A2(A) receptor is colocalized with BDNF in brain regions and the functional interaction between A2(A) receptor stimulation and BDNF action has been suggested. In this study, we investigated the possibility that the activation of A2(A) receptor modulates BDNF production in rat primary cortical neuron. CGS21680, an adenosine A2(A) receptor agonist, induced BDNF expression and release. An antagonist against A2(A) receptor, ZM241385, prevented CGS21680-induced increase in BDNF production. A2(A) receptor stimulation induced the activation of Akt-GSK-3β signaling pathway and the blockade of the signaling pathway with specific inhibitors abolished the increase in BDNF production, possibly via modulation of ERK1/2-CREB pathway. The physiological roles of A2(A) receptor-induced BDNF production was demonstrated by the protection of neurons from the excitotoxicity and increased neurite extension as well as synapse formation from immature and mature neurons. Taken together, activation of A2(A) receptor regulates BDNF production in rat cortical neuron, which provides neuro-protective action.
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