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Sionov RV, Ahdut-HaCohen R. A Supportive Role of Mesenchymal Stem Cells on Insulin-Producing Langerhans Islets with a Specific Emphasis on The Secretome. Biomedicines 2023; 11:2558. [PMID: 37761001 PMCID: PMC10527322 DOI: 10.3390/biomedicines11092558] [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: 08/15/2023] [Revised: 09/06/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Type 1 Diabetes (T1D) is a chronic autoimmune disease characterized by a gradual destruction of insulin-producing β-cells in the endocrine pancreas due to innate and specific immune responses, leading to impaired glucose homeostasis. T1D patients usually require regular insulin injections after meals to maintain normal serum glucose levels. In severe cases, pancreas or Langerhans islet transplantation can assist in reaching a sufficient β-mass to normalize glucose homeostasis. The latter procedure is limited because of low donor availability, high islet loss, and immune rejection. There is still a need to develop new technologies to improve islet survival and implantation and to keep the islets functional. Mesenchymal stem cells (MSCs) are multipotent non-hematopoietic progenitor cells with high plasticity that can support human pancreatic islet function both in vitro and in vivo and islet co-transplantation with MSCs is more effective than islet transplantation alone in attenuating diabetes progression. The beneficial effect of MSCs on islet function is due to a combined effect on angiogenesis, suppression of immune responses, and secretion of growth factors essential for islet survival and function. In this review, various aspects of MSCs related to islet function and diabetes are described.
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Affiliation(s)
- Ronit Vogt Sionov
- The Institute of Biomedical and Oral Research (IBOR), Faculty of Dental Medicine, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel
| | - Ronit Ahdut-HaCohen
- Department of Medical Neurobiology, Institute of Medical Research, Hadassah Medical School, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel;
- Department of Science, The David Yellin Academic College of Education, Jerusalem 9103501, Israel
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Zhang T, Wang H, Wang T, Wei C, Jiang H, Jiang S, Yang J, Shao J, Ma L. Pax4 synergistically acts with Pdx1, Ngn3 and MafA to induce HuMSCs to differentiate into functional pancreatic β-cells. Exp Ther Med 2019; 18:2592-2598. [PMID: 31572507 PMCID: PMC6755441 DOI: 10.3892/etm.2019.7854] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 07/05/2019] [Indexed: 02/05/2023] Open
Abstract
It has been indicated that the combination of pancreatic and duodenal homeobox 1 (Pdx1), MAF bZIP transcription factor A (MafA) and neurogenin 3 (Ngn3) was able to reprogram various cell types towards pancreatic β-like cells (pβLCs). Paired box 4 (Pax4), a transcription factor, has a key role in regulating the maturation of pancreatic β-cells (pβCs). In the present study, it was investigated whether Pax4 is able to synergistically act with Pdx1, Ngn3 and MafA to induce human umbilical cord mesenchymal stem cells (HuMSCs) to differentiate into functional pβCs in vitro. HuMSCs were isolated, cultured and separately transfected with adenovirus (Ad) expressing enhanced green fluorescence protein, Pax4 (Ad-Pax4), Pdx1+MafA+Ngn3 (Ad-3F) or Ad-Pxa4 + Ad-3F. The expression of C-peptide, insulin and glucagon was detected by immunofluorescence. The transcription of a panel of genes was determined by reverse transcription-quantitative PCR, including glucagon (GCG), insulin (INS), NK6 homeobox 1 (NKX6-1), solute carrier family 2 member 2 (SLC2A2), glucokinase (GCK), proprotein convertase subtilisin/kexin type 1 (PCSK1), neuronal differentiation 1 (NEUROD1), ISL LIM homeobox 1 (ISL 1), Pax6 and PCSK type 2 (PCSK2). Insulin secretion stimulated by glucose was determined using ELISA. The results suggested that, compared with Ad-3F alone, cells co-transfected with Ad-Pax4 and Ad-3F expressed higher levels of INS and C-peptide, as well as genes expressed in pancreatic β precursor cells, and secreted more insulin in response to high glucose. Furthermore, the expression of GCG in cells transfected with Ad-3F was depressed by Ad-Pax4. The present study demonstrated that Pax4 was able to synergistically act with the transcription factors Pdx1, Ngn3 and MafA to convert HuMSCs to functional pβLCs. HuMSCs may be potential seed cells for generating functional pβLCs in the therapy of diabetes.
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Affiliation(s)
- Ting Zhang
- Department of Hematology and Oncology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, P.R. China
| | - Hongwu Wang
- Department of Pediatrics, The Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
| | - Tianyou Wang
- Hematological Tumor Center, Beijing Children's Hospital Affiliated to Capital Medical University, Beijing 100045, P.R. China
| | - Chiju Wei
- Multidisciplinary Research Center, Shantou University, Shantou, Guangdong 515063, P.R. China
| | - Hui Jiang
- Department of Hematology and Oncology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, P.R. China
| | - Shayi Jiang
- Department of Hematology and Oncology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, P.R. China
| | - Jingwei Yang
- Department of Hematology and Oncology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, P.R. China
| | - Jingbo Shao
- Department of Hematology and Oncology, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, P.R. China
- Correspondence to: Dr Jingbo Shao, Department of Hematology and Oncology, Shanghai Children's Hospital, Shanghai Jiao Tong University, 355 Luding Road, Shanghai 200062, P.R. China, E-mail:
| | - Lian Ma
- Department of Pediatrics, The Second Affiliated Hospital of Shantou University Medical College, Shantou, Guangdong 515041, P.R. China
- Department of Hematology and Oncology, Shenzhen Children's Hospital, Shenzhen, Guangdong 518038, P.R. China
- Shenzhen Public Service Platform of Molecular Medicine in Pediatric Hematology and Oncology, Shenzhen, Guangdong 518038, P.R. China
- Dr Lian Ma, Department of Hematology and Oncology, Shenzhen Children's Hospital, 7019 Yitian Road, Shenzhen, Guangdong 518038, P.R. China, E-mail:
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Dayer D, Tabandeh MR, Moghimipour E, Hashemi Tabar M, Ghadiri A, Allah Bakhshi E, Orazizadeh M, Ghafari MA. MafA Overexpression: A New Efficient Protocol for In Vitro Differentiation of Adipose-Derived Mesenchymal Stem Cells into Functional Insulin-Producing Cells. CELL JOURNAL 2019; 21:169-178. [PMID: 30825290 PMCID: PMC6397604 DOI: 10.22074/cellj.2019.5669] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 08/07/2018] [Indexed: 11/25/2022]
Abstract
Objective We proposed a novel differentiation method for the efficient differentiation of adipose-derived mesenchymal stem
cells (ADMSCs) into functional insulin-producing cells (IPCs) based on MafA overexpression.
Materials and Methods In this experimental study, a eukaryotic expression vector containing MafA [MafA/pcDNA3.1(+)]
was constructed and purified. ADMSCs were differentiated into IPCs. ADMSCs were assigned in two groups including
control (C), and the MafA overexpressed (MafA+) groups. The ADMSCs were transfected by MafA/pcDNA 3.1(+) at day
10 of the differentiation. Differentiated cells were analyzed for the expression of multiple β cell specific genes (Nkx2.2,
Ngn3, Isl-1, Pdx1, MafA, Nkx6.1, and Insulin) using real-time polymerase chain reaction (PCR). The insulin secretion
potency of the differentiated cells in response to glucose exposure was also determined using an enzyme-linked
immunosorbent assay (ELISA) method and Dithizone (DTZ) staining. The IPCs from the control manipulated group,
and un-differentiated ADMSCs group were transplanted to streptozotocin (STZ)-diabetic rats. Rats were monitored for
blood glucose and insulin concentration.
Results The results revealed that ADMSCs were successfully differentiated into IPCs through the 14 day differentiation
protocol. The expression of β-cell specific genes in MafA+ IPCs was higher than in control cells. Glucose-induced
insulin secretion after the exposure of IPCs to glucose was higher in MafA+ group than the control group. The STZ-
diabetic rats showed an ability to secrete insulin and apparent hyperglycemic condition adjustment after transplantation
of the control IPCs. The mean insulin concentration of diabetic rats that were transplanted by manipulated IPCs was
significantly higher than ADMSCs-transplanted rats; however, no effect was observed in the concentration of blood
glucose.
Conclusion The overexpression of MafA can be used as a novel promising approach for the efficient production of
IPCs from ADMSCs in vitro. However, the future therapeutic use of the MafA+ IPCs in diabetic animals needs further
investigations.
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Affiliation(s)
- Dian Dayer
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.Electronic Address:
| | - Mohammad Reza Tabandeh
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.,Stem Cells and Transgenic Technology Research Center, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Eskandar Moghimipour
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Pharmaceutics, Faculty of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mahmood Hashemi Tabar
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Anatomy, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - AtaA Ghadiri
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Immunology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Elham Allah Bakhshi
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mahmoud Orazizadeh
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Anatomy, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Ali Ghafari
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Biochemistry, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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Xiao XH, Huang QY, Qian XL, Duan J, Jiao XQ, Wu LY, Huang QY, Li J, Lai XN, Shi YB, Xiong LX. Cdc42 Promotes ADSC-Derived IPC Induction, Proliferation, And Insulin Secretion Via Wnt/β-Catenin Signaling. Diabetes Metab Syndr Obes 2019; 12:2325-2339. [PMID: 32009808 PMCID: PMC6859340 DOI: 10.2147/dmso.s226055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 10/25/2019] [Indexed: 12/16/2022] Open
Abstract
PURPOSE Type 1 diabetes mellitus (T1DM) is characterized by irreversible islet β cell destruction. Accumulative evidence indicated that Cdc42 and Wnt/β-catenin signaling both play a critical role in the pathogenesis and development of T1DM. Further, bio-molecular mechanisms in adipose-derived mesenchymal stem cells (ADSCs)-derived insulin-producing cells (IPCs) remain largely unknown. Our aim was to investigate the underlying mechanism of Cdc42/Wnt/β-catenin pathway in ADSC-derived IPCs, which may provide new insights into the therapeutic strategy for T1DM patients. METHODS ADSC induction was accomplished with DMSO under high-glucose condition. ML141 (Cdc42 inhibitor) and Wnt-3a (Wnt signaling activator) were administered to ADSCs from day 2 until the induction finished. Morphological changes were determined by an inverted microscope. Dithizone staining was employed to evaluate the induction of ADSC-derived IPCs. qPCR and Western blotting were employed to measure the mRNA and protein expression level of islet cell development-related genes and Wnt signaling-related genes. The proliferation ability of ADSC-derived IPCs was also detected with a cell counting kit (CCK) assay. The expression and secretion of Insulin were detected with immunofluorescence test and enzyme-linked immunosorbent assay (ELISA) respectively. RESULTS During induction, morphological characters of ADSCs changed into spindle and round shape, and formed islet-line cell clusters, with brown dithizone-stained cytoplasm. Expression levels of islet cell development-related genes were up-regulated in ADSC-derived IPCs. Wnt-3a promoted Wnt signaling markers and islet cell development-related gene expression at mRNA and protein levels, while ML141 played a negative effect. Wnt-3a promoted ADSC-derived IPC proliferation and glucose-stimulated insulin secretion (GSIS), while ML141 played a negative effect. CONCLUSION Our research demonstrated that DMSO and high-glucose condition can induce ADSCs into IPCs, and Wnt signaling promotes the induction. Cdc42 may promote IPC induction, IPC proliferation and insulin secretion via Wnt/β-catenin pathway, meaning that Cdc42 may be regarded as a potential target in the treatment of T1DM.
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Affiliation(s)
- Xing-Hua Xiao
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Qi-Yuan Huang
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Xian-Ling Qian
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Jing Duan
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Xue-Qiao Jiao
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Long-Yuan Wu
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Qing-Yun Huang
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Jun Li
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Xing-Ning Lai
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Yu-Bo Shi
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
| | - Li-Xia Xiong
- Department of Pathophysiology, Medical College, Nanchang University, Nanchang330006, People’s Republic of China
- Correspondence: Li-Xia Xiong Department of Pathophysiology, Medical College, Nanchang University, 461 Bayi Road, Nanchang330006, People’s Republic of ChinaTel +86-791-8636-0556 Email
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Nowakowski A, Walczak P, Janowski M, Lukomska B. Genetic Engineering of Mesenchymal Stem Cells for Regenerative Medicine. Stem Cells Dev 2015; 24:2219-42. [PMID: 26140302 DOI: 10.1089/scd.2015.0062] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Mesenchymal stem cells (MSCs), which can be obtained from various organs and easily propagated in vitro, are one of the most extensively used types of stem cells and have been shown to be efficacious in a broad set of diseases. The unique and highly desirable properties of MSCs include high migratory capacities toward injured areas, immunomodulatory features, and the natural ability to differentiate into connective tissue phenotypes. These phenotypes include bone and cartilage, and these properties predispose MSCs to be therapeutically useful. In addition, MSCs elicit their therapeutic effects by paracrine actions, in which the metabolism of target tissues is modulated. Genetic engineering methods can greatly amplify these properties and broaden the therapeutic capabilities of MSCs, including transdifferentiation toward diverse cell lineages. However, cell engineering can also affect safety and increase the cost of therapy based on MSCs; thus, the advantages and disadvantages of these procedures should be discussed. In this review, the latest applications of genetic engineering methods for MSCs with regenerative medicine purposes are presented.
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Affiliation(s)
- Adam Nowakowski
- 1 NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences , Warsaw, Poland
| | - Piotr Walczak
- 2 Division of Magnetic Resonance Research, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine , Baltimore, Maryland.,3 Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, The Johns Hopkins University School of Medicine , Baltimore, Maryland.,4 Department of Radiology, Faculty of Medical Sciences, University of Warmia and Mazury , Olsztyn, Poland
| | - Miroslaw Janowski
- 1 NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences , Warsaw, Poland .,2 Division of Magnetic Resonance Research, Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine , Baltimore, Maryland.,3 Cellular Imaging Section and Vascular Biology Program, Institute for Cell Engineering, The Johns Hopkins University School of Medicine , Baltimore, Maryland
| | - Barbara Lukomska
- 1 NeuroRepair Department, Mossakowski Medical Research Centre, Polish Academy of Sciences , Warsaw, Poland
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ZHANG RUOYU, CHEN HUAIHONG, ZHENG ZHE, LIU QIANG, XU LEI. Umbilical cord-derived mesenchymal stem cell therapy for neurological disorders via inhibition of mitogen-activated protein kinase pathway-mediated apoptosis. Mol Med Rep 2014; 11:1807-12. [DOI: 10.3892/mmr.2014.2985] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2013] [Accepted: 04/02/2014] [Indexed: 11/06/2022] Open
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PDX-1 mRNA-induced reprogramming of mouse pancreas-derived mesenchymal stem cells into insulin-producing cells in vitro. Clin Exp Med 2014; 15:501-9. [DOI: 10.1007/s10238-014-0319-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Accepted: 10/06/2014] [Indexed: 12/30/2022]
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Chang J, Tang L, Lei H, Zhang XG, Zuo Z, Huang W, Fu H. Effects of lentiviral infection of mesenchymal stem cells on the expression of octamer transcription factor 4. Mol Med Rep 2014; 10:2249-54. [PMID: 25174942 PMCID: PMC4199401 DOI: 10.3892/mmr.2014.2505] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 04/16/2014] [Indexed: 12/17/2022] Open
Abstract
The present study aimed to investigate the effects of lentiviral infection of human umbilical cord mesenchymal stem cells (hUCMSCs) on the expression of octamer transcription factor 4 (Oct4). hUCMSCs were infected with lentivirus carrying the green fluorescent protein gene (GFP) at different multiplicities of infection (MOI), and the optimal MOI was determined by flow cytometry; the proliferation of non-infected and GFP-carrying lentivirus-infected hUCMSCs was evaluated by the MTT assay; and the expression of the Oct4 gene was measured by quantitative reverse transcription-polymerase chain reaction (qRT-PCR) and immunofluorescence staining in hUCMSCs cultured in vitro for eight weeks. Positive GFP staining of hUCMSCs was estimated at >75% at 48 h following infection with the GFP-carrying lentivirus (MOI = 20); no effect on hUCMSC proliferation was detected by the MTT assay following the infection; immunofluorescence analysis detected positive Oct4 expression in the cell nuclei at two and eight weeks of culture, while the relative expression of Oct4 assessed by qRT-PCR was 0.9075±0.0124. The GFP gene carried by the lentivirus was successfully expressed in hUCMSCs and had no significant effect on Oct4 expression, which lays a solid foundation for future studies investigating gene functions via the use of exogenous markers.
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Affiliation(s)
- Jing Chang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Li Tang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Han Lei
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Xiao-Gang Zhang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Zhong Zuo
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Wei Huang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Hang Fu
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
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Xie HB, Guo T, Bai S, Dokos S. Hybrid soft computing systems for electromyographic signals analysis: a review. Biomed Eng Online 2014; 13:8. [PMID: 24490979 PMCID: PMC3922626 DOI: 10.1186/1475-925x-13-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2013] [Accepted: 01/30/2014] [Indexed: 11/12/2022] Open
Abstract
Electromyographic (EMG) is a bio-signal collected on human skeletal muscle. Analysis of EMG signals has been widely used to detect human movement intent, control various human-machine interfaces, diagnose neuromuscular diseases, and model neuromusculoskeletal system. With the advances of artificial intelligence and soft computing, many sophisticated techniques have been proposed for such purpose. Hybrid soft computing system (HSCS), the integration of these different techniques, aims to further improve the effectiveness, efficiency, and accuracy of EMG analysis. This paper reviews and compares key combinations of neural network, support vector machine, fuzzy logic, evolutionary computing, and swarm intelligence for EMG analysis. Our suggestions on the possible future development of HSCS in EMG analysis are also given in terms of basic soft computing techniques, further combination of these techniques, and their other applications in EMG analysis.
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Affiliation(s)
- Hong-Bo Xie
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Tianruo Guo
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Siwei Bai
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney 2052, Australia
| | - Socrates Dokos
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney 2052, Australia
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