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Swain L, Bhave S, Qiao X, Reyelt L, Everett K, Awata J, Raghav R, Powers SN, Sunagawa G, Natov PS, Mahmoudi E, Warner M, Couper G, Kawabori M, Miyashita S, Aryaputra T, Huggins GS, Chin MT, Kapur NK. Novel Role for Cardiolipin as a Target of Therapy to Mitigate Myocardial Injury Caused by Venoarterial Extracorporeal Membrane Oxygenation. Circulation 2024; 149:1341-1353. [PMID: 38235580 PMCID: PMC11039383 DOI: 10.1161/circulationaha.123.065298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 12/15/2023] [Indexed: 01/19/2024]
Abstract
BACKGROUND Cardiolipin is a mitochondrial-specific phospholipid that maintains integrity of the electron transport chain (ETC) and plays a central role in myocardial ischemia/reperfusion injury. Tafazzin is an enzyme that is required for cardiolipin maturation. Venoarterial extracorporeal membrane oxygenation (VA-ECMO) use to provide hemodynamic support for acute myocardial infarction has grown exponentially, is associated with poor outcomes, and is under active clinical investigation, yet the mechanistic effect of VA-ECMO on myocardial damage in acute myocardial infarction remains poorly understood. We hypothesized that VA-ECMO acutely depletes myocardial cardiolipin and exacerbates myocardial injury in acute myocardial infarction. METHODS We examined cardiolipin and tafazzin levels in human subjects with heart failure and healthy swine exposed to VA-ECMO and used a swine model of closed-chest myocardial ischemia/reperfusion injury to evaluate the effect of VA-ECMO on cardiolipin expression, myocardial injury, and mitochondrial function. RESULTS Cardiolipin and tafazzin levels are significantly reduced in the left ventricles of individuals requiring VA-ECMO compared with individuals without VA-ECMO before heart transplantation. Six hours of exposure to VA-ECMO also decreased left ventricular levels of cardiolipin and tafazzin in healthy swine compared with sham controls. To explore whether cardiolipin depletion by VA-ECMO increases infarct size, we performed left anterior descending artery occlusion for a total of 120 minutes followed by 180 minutes of reperfusion in adult swine in the presence and absence of MTP-131, an amphipathic molecule that interacts with cardiolipin to stabilize the inner mitochondrial membrane. Compared with reperfusion alone, VA-ECMO activation beginning after 90 minutes of left anterior descending artery occlusion increased infarct size (36±8% versus 48±7%; P<0.001). VA-ECMO also decreased cardiolipin and tafazzin levels, disrupted mitochondrial integrity, reduced electron transport chain function, and promoted oxidative stress. Compared with reperfusion alone or VA-ECMO before reperfusion, delivery of MTP-131 before VA-ECMO activation reduced infarct size (22±8%; P=0.03 versus reperfusion alone and P<0.001 versus VA-ECMO alone). MTP-131 restored cardiolipin and tafazzin levels, stabilized mitochondrial function, and reduced oxidative stress in the left ventricle. CONCLUSIONS We identified a novel mechanism by which VA-ECMO promotes myocardial injury and further identify cardiolipin as an important target of therapy to reduce infarct size and to preserve mitochondrial function in the setting of VA-ECMO for acute myocardial infarction.
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Affiliation(s)
- Lija Swain
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Shreyas Bhave
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Xiaoying Qiao
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Lara Reyelt
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Kay Everett
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Junya Awata
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Rahul Raghav
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Sarah N Powers
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Genya Sunagawa
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Peter S Natov
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Elena Mahmoudi
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Mary Warner
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Greg Couper
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Masa Kawabori
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Satoshi Miyashita
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Tejasvi Aryaputra
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Gordon S. Huggins
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Michael T. Chin
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
| | - Navin K. Kapur
- Molecular Cardiology Research Institute, Interventional Research Laboratories, and The Cardiovascular Center, Tufts Medical Center
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Kapur NK, Reyelt L, Everett K, Mahmoudi E, Kapur MS, Ellis JS, Swain L, Qiao X, Bhave S, Sunagawa G. Mechanically Regulating Cardiac Preload to Maximize Left Ventricular Unloading With a Transvalvular Microaxial Flow Pump. Circ Heart Fail 2024; 17:e011330. [PMID: 38626066 PMCID: PMC11027939 DOI: 10.1161/circheartfailure.123.011330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Affiliation(s)
- Navin K Kapur
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Lara Reyelt
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Kay Everett
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Elena Mahmoudi
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Madison S Kapur
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Jacob S Ellis
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Lija Swain
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Xiaoying Qiao
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Shreyas Bhave
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
| | - Genya Sunagawa
- The Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA
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Everett KD, Swain L, Reyelt L, Majumdar M, Qiao X, Bhave S, Warner M, Mahmoudi E, Chin MT, Awata J, Kapur NK. Transvalvular Unloading Mitigates Ventricular Injury Due to Venoarterial Extracorporeal Membrane Oxygenation in Acute Myocardial Infarction. JACC Basic Transl Sci 2023; 8:769-780. [PMID: 37547066 PMCID: PMC10401286 DOI: 10.1016/j.jacbts.2023.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/06/2023] [Accepted: 01/06/2023] [Indexed: 08/08/2023]
Abstract
Whether extracorporeal membrane oxygenation (ECMO) with Impella, known as EC-Pella, limits cardiac damage in acute myocardial infarction remains unknown. The authors now report that the combination of transvalvular unloading and ECMO (EC-Pella) initiated before reperfusion reduced infarct size compared with ECMO alone before reperfusion in a preclinical model of acute myocardial infarction. EC-Pella also reduced left ventricular pressure-volume area when transvalvular unloading was applied before, not after, activation of ECMO. The authors further observed that EC-Pella increased cardioprotective signaling but failed to rescue mitochondrial dysfunction compared with ECMO alone. These findings suggest that ECMO can increase infarct size in acute myocardial infarction and that EC-Pella can mitigate this effect but also suggest that left ventricular unloading and myocardial salvage may be uncoupled in the presence of ECMO in acute myocardial infarction. These observations implicate mechanisms beyond hemodynamic load as part of the injury cascade associated with ECMO in acute myocardial infarction.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Navin K. Kapur
- Address for correspondence: Dr Navin K. Kapur, CardioVascular Center and Molecular Cardiology Research Institute, Tufts Medical Center, 800 Washington Street, Box #80, Boston, Massachusetts 02111, USA. @NavinKapur4
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Chan JSK, Lau DHH, King E, Shum YKL, Roever L, Liu T, Ng K, Dee EC, Ciobanu A, Bazoukis G, Mahmoudi E, Satti DI, Jeevaratnam K, Baranchuk A, Tse G. Virtual medical research mentoring and collaboration: breaking the bounds of nationality during the COVID-19 pandemic. Eur Heart J 2022. [PMCID: PMC9383365 DOI: 10.1093/eurheartj/ehab849.179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Funding Acknowledgements Type of funding sources: None. OnBehalf Cardioovascular Analytics Group Background Medical research is critical to professional advancement, and mentoring is an important means of early research engagement in medical training. In contrast to international research collaborations, research mentoring programs are often locally limited. With the COVID-19 pandemic causing drifts to virtual classes and conferences, virtual international medical research mentoring may be viable. We hereby describe our experience with a virtual, international mentorship group for cardiovascular research. Methods Our virtual international research mentorship group has been running since 2015. The group focuses on risk stratification and outcomes research in cardiovascular medicine and epidemiology. Mentees from any country or region in all stages of medical careers are welcomed. Considering the increasing emphasis of contemporary research on multidisciplinary healthcare and translational research, our team also includes allied healthcare professionals or students, and graduates from natural sciences (Figure 1). With our members’ diverse backgrounds, we firmly adhere to the principle that all members must be given equal opportunities and treatment, regardless of their age, gender, race, nationality, sexual orientation, family background, and institution of study or practice. We make use of virtual platforms and multi-level mentoring (both senior and peer mentoring), and emphasize active participation, early leadership, open culture, accessible research support, and a distributed research workflow (i.e. an accessible-distributed model). Results Since establishment, our group has expanded to include 63 active members from 14 countries (Figure 2), leading a total of 109 peer-reviewed original studies and reviews published. We observed no significant difficulty in communication between team members, nor conflicts due to differences in nationality or ethnicity. Most studies involve cross-country and ethnicity collaborations, and inter-disciplinary and inter-regional knowledge exchanges are frequent. Multi-level mentoring ensured mentoring quality without compromising bonding and communication. Conclusion An accessible-distributed model of virtual international medical research collaboration and multi-level mentoring is viable, efficient, and caters to the needs of contemporary healthcare. We hope that others will build similar models and improve medical research mentoring globally.
Abstract Figure 1
Abstract Figure 2 ![]()
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Affiliation(s)
- J S K Chan
- Cardiovascular Analytics Group, Hong Kong, Hong Kong
| | - D H H Lau
- Cardiovascular Analytics Group, Hong Kong, Hong Kong
| | - E King
- Cardiovascular Analytics Group, Hong Kong, Hong Kong
| | - Y K L Shum
- Cardiovascular Analytics Group, Hong Kong, Hong Kong
| | - L Roever
- Federal University of Uberlandia, Uberlandia, Brazil
| | - T Liu
- Tianjin Medical University, Tianjin, China
| | - K Ng
- University College London Hospitals, London, United Kingdom of Great Britain & Northern Ireland
| | - E C Dee
- Memorial Sloan Kettering Cancer Center, New York, United States of America
| | - A Ciobanu
- Carol Davila University Of Medicine And Pharm, Bucharest, Romania
| | | | - E Mahmoudi
- Tehran University of Medical Sciences, Tehran, Iran (Islamic Republic of)
| | - D I Satti
- Shifa College of Medicine, Islamabad, Pakistan
| | - K Jeevaratnam
- University of Surrey, Guildford, United Kingdom of Great Britain & Northern Ireland
| | | | - G Tse
- Kent and Medway Medical School, Canterbury, United Kingdom of Great Britain & Northern Ireland
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Everett KD, Swain L, Reyelt L, Majumdar M, Qiao X, Bhave S, Warner M, Mahmoudi E, Surks W, Aryaputra T, Goel S, Kapur NK. CRT-600.10 Combining VA-ECMO and Impella (EC-Pella) Before Reperfusion Mitigates Left Ventricular Loading and Injury Due to VA-ECMO in Acute Myocardial Infarction. JACC Cardiovasc Interv 2022. [DOI: 10.1016/j.jcin.2022.01.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Parchehbaf-Kashani M, Ansari H, Mahmoudi E, Barekat M, Sepantafar M, Rajabi S, Pahlavan S. Heart Repair Induced by Cardiac Progenitor Cell Delivery within Polypyrrole-Loaded Cardiogel Post-ischemia. ACS Appl Bio Mater 2021; 4:4849-4861. [PMID: 35007034 DOI: 10.1021/acsabm.1c00133] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Myocardial infarction (MI) irreversibly injures the heart tissue. Cardiovascular tissue engineering has been developed as a promising therapeutic approach for post-MI repair. Previously, we discovered the ability of a polypyrrole (PPy)-incorporated cardiogel (CG) for improvement of maturity and functional synchrony of rat neonatal cardiomyocytes. Here, we used the cross-linked form of PPy-incorporated CG (CG-PPy), in order to improve electromechanical properties of scaffold, for application in cardiac progenitor cell (CPC) transplantation on post-MI rat hearts. Improved mechanical property and electrical conductivity (sixfold) were evident in the cross-linked CG-PPy (P1) compared to cross-linked CG (C1) scaffolds. Transplantation of CPC-loaded P1 (P1-CPC) resulted in substantial improvement of cardiac functional properties. Furthermore, lower fibrotic tissue and higher CPC retention were observed. The grafted cells showed cardiomyocyte characteristics when stained with human cardiac troponin T and connexin43 antibodies, while neovessel formation was similarly prominent. These findings highlight the therapeutic promise of the P1 scaffold as a CPC carrier for functional restoration of the heart post-MI.
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Affiliation(s)
- Melika Parchehbaf-Kashani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran
| | - Hassan Ansari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran
| | - Elena Mahmoudi
- Massachusetts General Hospital, Harvard Medical School, Boston 02115, Massachusetts, United States
| | - Maryam Barekat
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran
| | - Mohammadmajid Sepantafar
- Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran
| | - Sarah Rajabi
- Department of Cell Engineering, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran
| | - Sara Pahlavan
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran 16635-148, Iran
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Suhaimi A, Mahmoudi E, Siow K, Mohd Razip Wee M. Surface Modification of Polyamide Ultrafiltration Membrane by Plasma Polymerisation of Acrylic Acid. SAINS MALAYS 2020. [DOI: 10.17576/jsm-2020-4912-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Increase in hydrophilicity of the filtration membrane could attribute to the fouling reduction and overall filtration performance. In this study, we employ a surface modification on polyamide (PA) membrane by using plasma polymerization with acrylic acid as the precursor by varying the deposition time from 1 to 10 min to induce hydrophilic surface of the membrane without changing the bulk properties of PA membrane. Cross-flow filtration of humic acid using the modified PA membrane was conducted to measure permeates flux and rejection. We calculate the fouling tendencies of each membrane and the result indicates the best performance from sample with 7 min deposition time in terms of permeate flux, rejection and the lowest fouling tendencies. Therefore, this proposed technique could be useful to further improve the commercial filtration membrane; without changing the membrane fabrication process.
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Mahmoudi E, Cates C, Chapman H, George EM. Hypoxia‐Induced Syndecan 1 Shedding in Placental Trophoblasts is Associated with Increased Peroxide. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.09903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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9
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Vahdat S, Pahlavan S, Mahmoudi E, Barekat M, Ansari H, Bakhshandeh B, Aghdami N, Baharvand H. Expansion of Human Pluripotent Stem Cell-derived Early Cardiovascular Progenitor Cells by a Cocktail of Signaling Factors. Sci Rep 2019; 9:16006. [PMID: 31690816 PMCID: PMC6831601 DOI: 10.1038/s41598-019-52516-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 10/16/2019] [Indexed: 11/15/2022] Open
Abstract
Cardiovascular progenitor cells (CPCs) derived from human pluripotent stem cells (hPSCs) are proposed to be invaluable cell sources for experimental and clinical studies. This wide range of applications necessitates large-scale production of CPCs in an in vitro culture system, which enables both expansion and maintenance of these cells. In this study, we aimed to develop a defined and efficient culture medium that uses signaling factors for large-scale expansion of early CPCs, called cardiogenic mesodermal cells (CMCs), which were derived from hPSCs. Chemical screening resulted in a medium that contained a reproducible combination of three factors (A83-01, bFGF, and CHIR99021) that generated 1014 CMCs after 10 passages without the propensity for tumorigenicity. Expanded CMCs retained their gene expression pattern, chromosomal stability, and differentiation tendency through several passages and showed both the safety and possible cardio-protective potentials when transplanted into the infarcted rat myocardium. These CMCs were efficiently cryopreserved for an extended period of time. This culture medium could be used for both adherent and suspension culture conditions, for which the latter is required for large-scale CMC production. Taken together, hPSC-derived CMCs exhibited self-renewal capacity in our simple, reproducible, and defined medium. These cells might ultimately be potential, promising cell sources for cardiovascular studies.
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Affiliation(s)
- Sadaf Vahdat
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Sara Pahlavan
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Elena Mahmoudi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Maryam Barekat
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hassan Ansari
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Behnaz Bakhshandeh
- Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran
| | - Nasser Aghdami
- Department of Regenerative Medicine, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hossein Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.
- Department of Developmental Biology, University of Science and Culture, Tehran, Iran.
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10
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Varzideh F, Mahmoudi E, Pahlavan S. Coculture with noncardiac cells promoted maturation of human stem cell-derived cardiomyocyte microtissues. J Cell Biochem 2019; 120:16681-16691. [PMID: 31090105 DOI: 10.1002/jcb.28926] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 04/07/2019] [Accepted: 04/11/2019] [Indexed: 12/17/2022]
Abstract
Cardiomyocytes derived from human pluripotent stem cells (hPSC-CM) provided a promising cell source for cell therapy, drug screening, and disease modeling. However, hPSC-CM are immature and phenotypically more similar to fetal rather than adult cardiomyocytes in vitro. We explored the impact of coculture of human embryonic stem cell-derived mesenchymal stem cells (hESC-MSC) and endothelial cells (ECs) with human embryonic stem cells-derived cardiac progenitor cells (hESC-CPC) on the gene expression and electrophysiological properties of hESC-CPC in 3D culture (microtissue spheroid). In this regard, hESC-CPC were cultured either alone (CM microtissue) or in coculture with EC and hESC-MSC (CMEM microtissue) on agar-coated 96-well round-bottomed plates for 1 week. Lumen-like structures were formed in CMEM but not in CM microtissue. Cardiac progenitor markers (TBX5, GATA4) were downregulated and cardiac sarcomeric transcripts (MLC2v and β-MHC) were upregulated in CMEM compared with CM microtissue. Furthermore, beating frequencies, beating cycles, and field potential durations of CMEM resided in the range of adult cardiomyocytes rather than fetal like phenotypes observed in CM microtissue. These findings demonstrated that CPC spheroids in coculture with EC and hESC-MSC may undergo greater maturation toward an adult-like cardiomyocyte.
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Affiliation(s)
- Fahimeh Varzideh
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Elena Mahmoudi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Sara Pahlavan
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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Mahmoudi E, Lomax TM, Harmancey R. Uncoupling Protein 3 Deficiency Impairs Contractile Recovery in a Rat Model of Myocardial Infarction and Reperfusion. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.830.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elena Mahmoudi
- Physiology and BiophysicsMississippi Center for Obesity Research, and Mississippi Center for Heart ResearchUniversity of Mississippi Medical CenterJacksonMS
| | - Tyler M. Lomax
- Physiology and BiophysicsMississippi Center for Obesity Research, and Mississippi Center for Heart ResearchUniversity of Mississippi Medical CenterJacksonMS
| | - Romain Harmancey
- Physiology and BiophysicsMississippi Center for Obesity Research, and Mississippi Center for Heart ResearchUniversity of Mississippi Medical CenterJacksonMS
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Mahmoudi E, Cairns MJ. Circular RNAs are temporospatially regulated throughout development and ageing in the rat. Sci Rep 2019; 9:2564. [PMID: 30796328 PMCID: PMC6385508 DOI: 10.1038/s41598-019-38860-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 01/10/2019] [Indexed: 01/16/2023] Open
Abstract
Circular RNAs (circRNAs) are covalently closed structural isoforms of linear mRNA which have been observed across a broad range of species and tissues. Here, we provide a comprehensive circRNAs expression catalogue for the rat including 8 organs of both sexes during 4 developmental stages using a public RNAseq dataset. These analyses revealed thousands of circular RNA species, many expressed in an organ-specific manner along with their host genes which were enriched with tissue-specific biological functions. A large number of circRNAs also displayed a developmental-dependent expression pattern and are accumulated during ageing. CircRNAs also displayed some sexually dimorphic expression, with gender associated differences observed in various tissues and developmental stages. These observations suggest that circRNAs are dynamically expressed in a spatial-, temporal- and gender-specific manner in mammals, and may have important biological function in differentiation, development and aging.
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Affiliation(s)
- E Mahmoudi
- School of Biomedical Sciences and Pharmacy, the University of Newcastle, Callaghan, NSW, 2308, Australia.,Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, NSW, 2308, Australia.,Hunter Medical Research Institute, Newcastle, Australia
| | - M J Cairns
- School of Biomedical Sciences and Pharmacy, the University of Newcastle, Callaghan, NSW, 2308, Australia. .,Centre for Brain and Mental Health Research, University of Newcastle, Callaghan, NSW, 2308, Australia. .,Hunter Medical Research Institute, Newcastle, Australia.
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Mahmoudi E. Health Problems, Needed Services, and Promising Practices. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Mahmoudi E, Hafizi A, Rahimpour M, Bolhasani A, Shariati A. Inhibition effect of CeO2 promoted SiO2 coating on coke growth during steam cracking of ethane. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.05.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Abd Emami B, Mahmoudi E, Shokrgozar MA, Dehghan MM, Farzad Mohajeri S, Haghighipour N, Marjanmehr SH, Molazem M, Amin S, Gholami H. Mechanical and Chemical Predifferentiation of Mesenchymal Stem Cells Into Cardiomyocytes and Their Effectiveness on Acute Myocardial Infarction. Artif Organs 2018; 42:E114-E126. [PMID: 29508429 DOI: 10.1111/aor.13091] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 10/16/2017] [Accepted: 11/09/2017] [Indexed: 12/13/2022]
Abstract
Myocardial infarction is one of the leading causes of death all over the world. Mesenchymal stem cells (MSCs) transplantation has shown a promising potential to recovery of ischemic heart disease due to their capability in differentiating into cardiac cells. However, various investigations have been performed to optimize the efficacy of cardiac cell therapy in recent years. Here, we sought to interrogate the effect of autologous transplantation of undifferentiated and predifferentiated adipose and bone marrow-derived MSCs in a rabbit model of myocardial infarction and also to investigate whether cardiac function could be improved by mechanically induced MSCs via equiaxial cyclic strain. The two sources of MSCs were induced toward cardiomyocyte phenotype using mechanical loading and chemical factors and thereafter injected into the infarcted myocardium of 35 rabbits. Echocardiography and histopathology studies were used to evaluate cardiac function after 2 months. The results demonstrated significant scar size reduction and greater recovery of left ventricle ejection fraction after transplantation of predifferentiated cells, though the differences were not significant when comparing mechanically with chemically predifferentiated MSCs. Thus, although there was no significant improvement in infarcted myocardium between chemically and mechanically predifferentiated MSCs, mechanically induced cells are more preferred due to lack of any chemical intervention and cost reasonableness in their preparation method. Outcomes of this study may be useful for developing future therapeutic strategies, however long-term assessments are still required to further examine their effectiveness.
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Affiliation(s)
| | - Elena Mahmoudi
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.,Rajaei Cardiovascular Medical and Research Center, Iran University of Medical Science, Tehran, Iran
| | | | - Mohammad Mehdi Dehghan
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran.,Institute of Biomedical Research, University of Tehran, Tehran, Iran
| | - Saeed Farzad Mohajeri
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | | | | | - Mohammad Molazem
- Department of Surgery and Radiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Susan Amin
- National Cell Bank, Pasteur Institute of Iran, Tehran, Iran
| | - Hossein Gholami
- Department of Pathology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
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Namiri M, Kazemi Ashtiani M, Abbasalizadeh S, Mazidi Z, Mahmoudi E, Nikeghbalian S, Aghdami N, Baharvand H. Improving the biological function of decellularized heart valves through integration of protein tethering and three-dimensional cell seeding in a bioreactor. J Tissue Eng Regen Med 2017; 12:e1865-e1879. [PMID: 29164801 DOI: 10.1002/term.2617] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2016] [Revised: 07/22/2017] [Accepted: 11/09/2017] [Indexed: 12/30/2022]
Abstract
Decellularized xenogeneic heart valves (DHVs) are promising products for valve replacement. However, the widespread clinical application of such products is limited due to the risk of immune reaction, progressive degeneration, inflammation, and calcification. Here, we have developed an optimized decellularization protocol for a xenogeneic heart valve. We improved the biological function of DHVs by protein tethering onto DHV and three-dimensional (3D) cell seeding in a bioreactor. Our results showed that heart valves treated with a Triton X-100 and sodium deoxycholate-based protocol were completely cell-free, with preserved biochemical and biomechanical properties. The immobilization of stromal derived factor-1α (SDF-1α) and basic fibroblast growth factor on DHV significantly improved recellularization with endothelial progenitor cells under the 3D culture condition in the bioreactor compared to static culture conditions. Cell phenotype analysis showed higher fibroblast-like cells and less myofibroblast-like cells in both protein-tethered DHVs. However, SDF-DHV significantly enhanced recellularization both in vitro and in vivo compared to basic fibroblast growth factor DHV and demonstrated less inflammatory cell infiltration. SDF-DHV had less calcification and platelet adhesion. Altogether, integration of SDF-1α immobilization and 3D cell seeding in a bioreactor might provide a novel, promising approach for production of functional heart valves.
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Affiliation(s)
- Mehrnaz Namiri
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Developmental Biology, University of Science and Culture, Tehran, Iran
| | - Mohammad Kazemi Ashtiani
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Saeed Abbasalizadeh
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Zahra Mazidi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Elena Mahmoudi
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Saman Nikeghbalian
- Shiraz Transplant Center, Namazi Hospital, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Nasser Aghdami
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
| | - Hossein Baharvand
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.,Department of Developmental Biology, University of Science and Culture, Tehran, Iran
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18
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Chung KC, Nolte MT, Mahmoudi E. Management strategies in surgical research: the multidisciplinary team. J Hand Surg Eur Vol 2017; 42:213-215. [PMID: 28128032 DOI: 10.1177/1753193416680117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- K C Chung
- Section of Plastic Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | - M T Nolte
- Section of Plastic Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
| | - E Mahmoudi
- Section of Plastic Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
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19
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Mahmoudi E, Cairns MJ. MiR-137: an important player in neural development and neoplastic transformation. Mol Psychiatry 2017; 22:44-55. [PMID: 27620842 PMCID: PMC5414082 DOI: 10.1038/mp.2016.150] [Citation(s) in RCA: 128] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 06/17/2016] [Accepted: 06/23/2016] [Indexed: 12/13/2022]
Abstract
MicroRNAs (miRNAs) represent an important class of small regulatory RNAs that control gene expression posttranscriptionally by targeting mRNAs for degradation or translation inhibition. Early studies have revealed a complex role for miRNAs in major biological processes such as development, differentiation, growth and metabolism. MiR-137 in particular, has been of great interest due to its critical role in brain function and putative involvement in the etiology of both neuropsychiatric disorders and cancer. Several lines of evidence suggest that development, differentiation and maturation of the nervous system is strongly linked to the expression of miR-137 and its regulation of a large number of downstream target genes in various pathways. Dysregulation of this molecule has also been implicated in major mental illnesses through its position in a variant allele highly associated with schizophrenia in the largest mega genome-wide association studies. Interestingly, miR-137 has also been shown to act as a tumor suppressor, with numerous studies finding reduced expression in neoplasia including brain tumor. Restoration of miR-137 expression has also been shown to inhibit cell proliferation, migration and metastasis, and induce cell cycle arrest, differentiation and apoptosis. These properties of miR-137 propose its potential for prognosis, diagnosis and as a therapeutic target for treatment of several human neurological and neoplastic disorders. In this review, we provide details on the discovery, targets, function, regulation and disease involvement of miR-137 with a broad look at recent discovery in this area.
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Affiliation(s)
- E Mahmoudi
- School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia,Centre for Translational Neuroscience and Mental Health, Hunter Medical Research Institute, Newcastle, NSW, Australia
| | - M J Cairns
- School of Biomedical Sciences and Pharmacy, Faculty of Health and Medicine, University of Newcastle, Callaghan, NSW, Australia,Centre for Translational Neuroscience and Mental Health, Hunter Medical Research Institute, Newcastle, NSW, Australia,Schizophrenia Research Institute, Sydney, NSW, Australia,School of Biomedical Sciences and Pharmacy, University of Newcastle, University Drive, Callaghan, NSW 2308, Australia. E-mail:
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20
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Mahmoudi E, Saeidi M, Marashi MA, Moafi A, Mahmoodi V, Zeinolabedini Zamani M. In vitro activity of kombucha tea ethyl acetate fraction against Malassezia species isolated from seborrhoeic dermatitis. Curr Med Mycol 2016; 2:30-36. [PMID: 28959793 PMCID: PMC5611694 DOI: 10.18869/acadpub.cmm.2.4.30] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/09/2017] [Accepted: 07/23/2017] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND AND PURPOSE Seborrheic dermatitis is a chronic and recurrent superficial dermatitis in which Malassezia species play an important role. There are different Malassezia species, which have been recently reported to be resistant to common antifungals. Natural sources can be useful alternatives to reduce the emergence of this resistance. Kombucha tea is believed to have potential antimicrobial properties. Regarding this, the present study aimed to investigate the antifungal activity of Kombucha tea ethyl acetate fraction (KEAF) against Malassezia species obtained from the patients with seborrheic dermatitis. MATERIALS AND METHODS A total of 23 clinical isolates were identified by direct microscopic examination and Tween assimilation, and then confirmed by DNA sequencing of ITS regions for Malassezia species. Kombucha tea was fractionated using ethyl acetate (1:2 v/v). The minimum inhibitory concentration (MIC) microdilution assay was used to evaluate the anti-Malssezia activity of KEAF at three concentrations of 10, 40, and 80 mg/mL. RESULTS The results of the DNA sequence analysis indicated that M. furfur (39.13%) was the predominant species, followed by M. globosa (30.43%), M. sloofie (13.04%), M. sympodialis (13.04%), and M. restricta (4.34%), respectively. Furthermore, KEAF showed inhibitory activity against Malassezia species. Accordingly, KEAF had the lowest and highest MIC value against M. sloofie and M. restricta, respectively. Moreover, the inhibitory effect of the extract was equivalent to that of ketoconazole at 4.8 µg/mL. CONCLUSION The findings of the current study highlighted the antifungal properties of KEAF. Therefore, this extract can be promoted as complementary medicine for the treatment of the infections caused by Malassezia.
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Affiliation(s)
- E Mahmoudi
- Department of Mycology, Medical School, Alborz University of Medical Sciences, Karaj, Iran
| | - M Saeidi
- Department of Dermatology, Medical School, Alborz University of Medical Sciences, Karaj, Iran
| | - MA Marashi
- Department of Bacteriology, Medical School, Alborz University of Medical Sciences, Karaj, Iran
| | - A Moafi
- School of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - V Mahmoodi
- Department of Food Sciences and Technology, Faculty of Agriculture, Islamic Azad University, Shahr-e Kord, Iran
| | - M Zeinolabedini Zamani
- Department of Pathobiology, Food Microbiology Division, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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21
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Kalantar E, Asadi M, Hatami S, Barari MA, Naseh MH, Mahmoudi E, Kabir K. Candida non albicans isolates with a high antibiotic resistance: a real threat for cancer patients in Karaj City. Antimicrob Resist Infect Control 2015. [PMCID: PMC4475139 DOI: 10.1186/2047-2994-4-s1-p170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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22
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Bigham-Sadegh A, Karimi I, Oryan A, Mahmoudi E, Shafiei-Sarvestani Z. Spinal fusion with demineralized calf fetal growth plate as novel biomaterial in rat model: a preliminary study. Int J Spine Surg 2015; 8:14444-1005. [PMID: 25694913 PMCID: PMC4325481 DOI: 10.14444/1005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background Spinal fusions are being performed for various pathologies of the spine such as degenerative diseases, deformities, tumors and fractures. Recently, other bone substitutes such as demineralized bone matrix (DBM) have been developed for spinal fusion. Therefore, this study was conducted to evaluate the intertransverse posterolateral fusion with the Bovine fetal growth plate (DCFGP) and compare it with commercial DBM in rat model. Methods A total of 16 mature male rats (aged 4 months and weighing 200-300 g) were randomly divided in two groups. After a skin incision on posterolateral site, two separate fascial incisions were made 3 mm from the midline. A muscle-splitting approach was used to expose the transverse processes of L4 and L5. Group I (n = 8) underwent with implanted Bovine fetal growth plate among decorticated transverse processes. In group II (n = 8) commercial DBM was placed in the same manner. Fusion was evaluated by manual palpation, radiographical, gross and histopathological analysis. Results The manual palpation, radiological, gross and histopathological findings indicate high potential of the DCFGP in spinal fusion. At the 42nd postoperative day, new bone formation as evidenced by a bridge between L4 and L5 was visualized in all rats implanted with DCFGP and commercial DBM. The newly formed bone tissue was observed in all implanted areas on the 42nd day after operation in the two groups. Conclusions The spinal fusion of the animals of both groups demonstrated more advanced osteogenic potential and resulted in proper fusion of the transverse process of lumbar vertebra.
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Affiliation(s)
- Amin Bigham-Sadegh
- Department of Veterinary Surgery and Radiology, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
| | - Iraj Karimi
- Department of Veterinary Pathobiology, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
| | - Ahmad Oryan
- Department of Veterinary Pathobiology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | - Elena Mahmoudi
- Department of Veterinary Surgery, School of Veterinary Medicine, Tehran University, Tehran, Iran
| | - Zahra Shafiei-Sarvestani
- Department of Veterinary Surgery and Radiology, Faculty of Veterinary Medicine, Shahrekord University, Shahrekord, Iran
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23
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Sellami B, Khazri A, Louati H, Boufahja F, Dellali M, Sheehan D, Aissa P, Driss MR, Mahmoudi E, Beyrem H. Effects of permethrin on biomarkers in Mediterranean clams (Ruditapes decussatus). Bull Environ Contam Toxicol 2014; 92:574-578. [PMID: 24519478 DOI: 10.1007/s00128-014-1225-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 02/04/2014] [Indexed: 06/03/2023]
Abstract
The present study was focused on the assessment of Catalase (CAT) and Acetylcholinesterase (AChE) activities in Mediterranean clams (Ruditapes decussatus) exposed to 50, 100 and 150 μg/L of Permethrin for 5, 10, 15, 20 and 25 days. In water, the measured concentrations of Permethrin in the treated aquariums were respectively 16.66, 38.24 and 55.61 μg/L. Results showed that CAT activity was increased after 5 days of exposure to high concentration reaching maximum value of 10.14 μmol/min/mg proteins after 25 days. However, no significant changes in AChE activity after 5 days of exposure were detected in all treated groups. AChE activity was significantly inhibited after 10 days with 100 and 150 μg/L and still depending on concentration and time. Maximum inhibition of AChE activity was reached after 25 days with the highest concentration of Permethrin. Our data indicated that exposure to Permethrin modifies biomarker profiles inducing oxidative stress and reducing AChE activity in Mediterranean clams.
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Affiliation(s)
- B Sellami
- Laboratory of Environment Biomonitoring, Coastal Ecology Unit, Faculty of Sciences of Bizerta, University of Carthage, Zarzouna, 7021, Bizerta, Tunisia,
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Boufahja F, Hedfi A, Essid N, Aïssa P, Beyrem H, Mahmoudi E. Morphometric and energetic differences between nematode feeding groups of Moens, Vincx (1997) and their suitability for environmental biomonitoring. ekol 2011. [DOI: 10.4149/ekol_2011_01_91] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
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26
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Beyrem H, Louati H, Essid N, Aïssa P, Mahmoudi E. Effects of two lubricant oils on marine nematode assemblages in a laboratory microcosm experiment. Mar Environ Res 2010; 69:248-253. [PMID: 19959223 DOI: 10.1016/j.marenvres.2009.10.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2009] [Revised: 10/20/2009] [Accepted: 10/23/2009] [Indexed: 05/28/2023]
Abstract
The effects of two lubricating oils on nematode assemblages of a Tunisian lagoon were investigated in a microcosm experiment. Sediment from a pristine site in Ghar El Melh lagoon (Western Mediterranean) was treated with either mineral oil (Mobil 20 W-50), a synthetic lubricant (Mobil 0 W-40), the same two lubricants after use in a vehicle, and effects were examined after 5 weeks. Univariate analysis showed significant differences between most univariate indices of the nematode assemblages in all the lubricant treatments as compared to the control. Total nematode abundance (I), species richness (d) and number of species (S) decreased significantly in all lubricant contaminated microcosms. However, evenness was not affected in all treated replicates except in used mineral lubricant treatment where it was significantly higher than in the control. Diversity (H') was only altered in synthetic lubricant treatments. Results from multivariate analyses of the species abundance data demonstrated that responses of nematode species to the two lubricants treatments were varied: Daptonema trabeculosum was eliminated in all lubricant treatments and seemed to be an intolerant species to oil contamination. Spirinia gerlachi increased in mineral lubricant treatments ("clean" and used) but was eliminated in all synthetic lubricant treatments. This species could be categorized as "resistant" to mineral oil contamination and intolerant to synthetic lubricant contamination. Terschellingia longicaudata increased only in synthetic lubricant treatments ("clean" and used) and appeared to be a "synthetic oil-resistant" species.
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Affiliation(s)
- H Beyrem
- Laboratoire de Biosurveillance de l'Environnement, Faculté des Sciences de Bizerte, 7021 Zarzouna, Tunisia
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27
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Mahmoudi E, Dalvandi A, Rahgoi A, Rahgozar M, Zadehmohammadi A. P03-85 - Effect of music therapy on self-esteem of inpatient chronic schizophrenic patients. Eur Psychiatry 2010. [DOI: 10.1016/s0924-9338(10)71195-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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28
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Hermi M, Mahmoudi E, Beyrem H, Aïssa P, Essid N. Responses of a free-living marine nematode community to mercury contamination: results from microcosm experiments. Arch Environ Contam Toxicol 2009; 56:426-433. [PMID: 18726536 DOI: 10.1007/s00244-008-9217-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Accepted: 08/04/2008] [Indexed: 05/26/2023]
Abstract
A microcosm experiment was used to examine the effects of mercury contamination on a free-living nematode community in a Tunisian lagoon. Sediments were contaminated with three mercury concentrations (low, 0.084 ppm; medium, 0.167 ppm; and high, 0.334 ppm), and effects were examined after 60 days. Results from multiple-comparison tests showed significant differences between nematode assemblages from undisturbed control and those from mercury treatments. Most univariate measures decreased significantly with increasing level of Hg contamination. Results from multivariate analyses of the species abundance data demonstrated that responses of nematode species to mercury contamination were varied: Araeolaimus bioculatus was eliminated at all the mercury doses tested and seemed to be an intolerant species to mercury contamination; Marylynnia stekhoveni increased at low and medium concentrations and appeared to be an "opportunistic" species at these doses, whereas Prochromadorella neapolitana, which increased at all doses tested (0.084, 0.167, and 0.334 ppm), seemed to be a "mercury-resistant" species.
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Affiliation(s)
- M Hermi
- Laboratoire de Biosurveillance de l'Environnement, Faculté des Sciences de Bizerte, Zarzouna, Tunisie
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29
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Beyrem H, Mahmoudi E, Essid N, Hedfi A, Boufahja F, Aïssa P. Individual and combined effects of cadmium and diesel on a nematode community in a laboratory microcosm experiment. Ecotoxicol Environ Saf 2007; 68:412-8. [PMID: 17303240 DOI: 10.1016/j.ecoenv.2006.12.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2005] [Revised: 11/11/2006] [Accepted: 12/14/2006] [Indexed: 05/14/2023]
Abstract
A microcosm experiment was carried out to study the influence of cadmium and diesel, individually and in a mixture, on a free living nematode community of a Tunisian lagoon. Sediments were contaminated with cadmium that ranged in concentration from 0.54 to 1.40 mg Cd kg(-1) (dry weight (dw)), by diesel at 0.25 mg kg(-1) (dw), by a cadmium-diesel mixture (Cd at 1.40 mg kg(-1)+Diesel at 0.25 mg kg(-1)) and effects were examined after 90 days. Univariate analysis showed that all univariate indices did not change significantly neither at all the levels of cadmium contamination nor at 0.25 mg kg(-1) (dw) diesel concentration. But, at the cadmium-diesel mixture, significant differences were recorded between nematode assemblages from uncontaminated sediment control microcosm and those from cadmium-diesel mixture amended sediment treatments. Total nematode abundance (I), mean individual weight (bi), Shannon-Weaver index H', species richness (d), evenness (J') and number of species (S) decreased significantly in microcosms contaminated with both cadmium and diesel. Results from multivariate analyses of the species abundance data demonstrated that responses of nematode species to the cadmium-diesel treatments were varied: Marylynnia stekhoveni, Calomicrolaimus honestus and Oncholaimellus mediterraneus were significantly affected at the cadmium-diesel contamination but they were not eliminated. These species could be categorized as "cadmium-diesel sensitive". Enoploides sp. and Oncholaimus campylocercoides, characterized by increased abundances in cadmium-diesel amended sediment, seemed to be "cadmium-diesel resistant" species. All these species, "cadmium-diesel sensitive" or "cadmium-diesel resistant", were not affected by either cadmium or diesel alone.
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Affiliation(s)
- H Beyrem
- Environmental Biomonitoring Laboratory, Science University of Bizerta, Zarzouna 7021, Tunisia
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Hedfi A, Mahmoudi E, Boufahja F, Beyrem H, Aïssa P. Effects of increasing levels of nickel contamination on structure of offshore nematode communities in experimental microcosms. Bull Environ Contam Toxicol 2007; 79:345-9. [PMID: 17712504 DOI: 10.1007/s00128-007-9261-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2007] [Accepted: 07/19/2007] [Indexed: 05/16/2023]
Abstract
A microcosm experiment was used to examine the effects of nickel on offshore nematode communities of a Tunisian coastal zone (Southwestern Mediterranean Sea). Sediments were contaminated with three nickel concentrations [low (250 ppm), medium (550 ppm) and high (900 ppm)], and effects were examined after 30 days. Results showed significant differences between nematode assemblages from undisturbed controls and those from nickel treatments. Most univariates measures, including diversity and species richness, decreased significantly with increasing level of Ni contamination. Results from multivariate analyses of the species abundance data demonstrated that responses of nematode species to the nickel treatments were varied: Leptonemella aphanothecae was eliminated at all the nickel doses tested and seemed to be intolerant species to nickel contamination; Daptonema normandicum, Neochromadora trichophora and Odontophora armata which significantly increased at 550 ppm nickel concentration appeared to be "opportunistic" species at this dose whereas Oncholaimus campylocercoides and Bathylaimus capacosus which increased at all doses tested (250, 550 and 900 ppm) seemed to be "nickel-resistant" species.
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Affiliation(s)
- A Hedfi
- Unité d'Ecologie Côtière Faculté des Sciences de Bizerte, Laboratoire de Biosurveillance de l'Environnement, 7021 Zarzouna, Bizerte, Tunisia.
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