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Ansari FJ, Tafti HA, Amanzadeh A, Rabbani S, Shokrgozar MA, Heidari R, Behroozi J, Eyni H, Uversky VN, Ghanbari H. Comparison of the efficiency of ultrafiltration, precipitation, and ultracentrifugation methods for exosome isolation. Biochem Biophys Rep 2024; 38:101668. [PMID: 38405663 PMCID: PMC10885727 DOI: 10.1016/j.bbrep.2024.101668] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 02/14/2024] [Accepted: 02/16/2024] [Indexed: 02/27/2024] Open
Abstract
Extracellular vesicles (EVs) are enclosed by a lipid-bilayer membrane and secreted by all types of cells. They are classified into three groups: apoptotic bodies, microvesicles, and exosomes. Exosomes play a number of important roles in the intercellular communication and crosstalk between tissues in the body. In this study, we use three common methods based on different principles for exosome isolation, namely ultrafiltration, precipitation, and ultracentrifugation. We use field emission scanning electron microscopy (FESEM) and dynamic light scattering (DLS) analyses for characterization of exosomes. The functionality and effect of isolated exosomes on the viability of hypoxic cells was investigated by alamarBlue and Flow-cytometry. The results of the FESEM study show that the ultrafiltration method isolates vesicles with higher variability of shapes and sizes when compared to the precipitation and ultracentrifugation methods. DLS results show that mean size of exosomes isolated by ultrafiltration, precipitation, and ultracentrifugation methods are 122, 89, and 60 nm respectively. AlamarBlue analysis show that isolated exosomes increase the viability of damaged cells by 11%, 15%, and 22%, respectively. Flow-cytometry analysis of damaged cells also show that these vesicles increase the content of live cells by 9%, 15%, and 20%, respectively. This study shows that exosomes isolated by the ultracentrifugation method are characterized by smaller size and narrow size distribution. Furthermore, more homogenous particles isolated by this method show increased efficiency of the protection of hypoxic cells in comparison with the exosomes isolated by the two other methods.
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Affiliation(s)
- Farshid Jaberi Ansari
- Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ahmadi Tafti
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Disease Research Institute, Tehran Heart Center Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Amanzadeh
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, Iran
| | - Shahram Rabbani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Disease Research Institute, Tehran Heart Center Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Reza Heidari
- Medical Biotechnology Research Center, AJA University of Medical Sciences, Tehran, 1411718541, Iran
| | - Javad Behroozi
- Research Center for Cancer Screening and Epidemiology, AJA University of Medical Sciences, Tehran, Iran
| | - Hossein Eyni
- Stem Cell and Regenerative Medicine Research Center, Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Vladimir N. Uversky
- Department of Molecular Medicine and USF Health Byrd Alzheimer’s Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA
| | - Hossein Ghanbari
- Department of Medical Nanotechnology, Faculty of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Disease Research Institute, Tehran Heart Center Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Institute for Biomaterials, University of Tehran & Tehran University of Medical Sciences, Tehran, Iran
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Shokri M, Kharaziha M, Tafti HA, Dalili F, Aghdam RM, Eslaminejad MB. Engineering Wet-resistant and Osteogenic Nanocomposite Adhesive to Control Bleeding and Infection after Median Sternotomy. Adv Healthc Mater 2024:e2304349. [PMID: 38593272 DOI: 10.1002/adhm.202304349] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/13/2024] [Indexed: 04/11/2024]
Abstract
Median sternotomy surgery stands as one of the prevailing strategies in cardiac surgery. In this study, the cutting-edge bone adhesive is designed, inspired by the impressive adhesive properties found in mussels and sandcastle worms. We have created an osteogenic nanocomposite coacervate adhesive by integrating a cellulose-polyphosphodopamide interpenetrating network, quaternized chitosan, and zinc, gallium-doped hydroxyapatite nanoparticles. This adhesive is characterized by robust catechol-metal coordination which effectively adheres to both hard and soft tissues with a maximum adhesive strength of 900 ±38 kPa on the sheep sternum bone, surpassing that of commercial bone adhesives. The release of zinc and gallium cations from nanocomposite adhesives and quaternized chitosan matrix imparts remarkable antibacterial properties and promotes rapid blood coagulation, in vitro and ex vivo. It is also proved that this nanocomposite adhesive exhibits significant in vitro bioactivity, stable degradability, biocompatibility, and osteogenic ability. Furthermore, the capacity of nanocomposite coacervate to adhere to bone tissue and support osteogenesis contributes to the successful healing of a sternum bone defect in a rabbit model in vivo. In summary, these nanocomposite coacervate adhesives with promising characteristics are expected to provide solutions to clinical issues faced during median sternotomy surgery. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Mahshid Shokri
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
- Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahshid Kharaziha
- Department of Materials Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Hossein Ahmadi Tafti
- Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Faezeh Dalili
- School of Metallurgy & Materials Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
| | | | - Mohamadreza Baghaban Eslaminejad
- Department of Stem Cells and Developmental Biology, Cell Sciences Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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3
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Jameie M, Rezaee M, Pashang M, Jalali A, Khalaji A, Behnoush AH, Fallahzadeh A, Sheikhy A, Masoudkabir F, Tafti HA, Momtahen S, Mansourian S, Hosseini K. Factors Affecting Late Atrial Fibrillation and Its Association With Coronary Artery Bypass Outcomes. Ann Thorac Surg 2024:S0003-4975(24)00108-5. [PMID: 38360338 DOI: 10.1016/j.athoracsur.2024.02.007] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 01/07/2024] [Accepted: 02/05/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND Although predictors and outcomes of postoperative atrial fibrillation (POAF) are well studied, evidence is lacking concerning postdischarge late/recurrent atrial fibrillation (AF). This study evaluated factors affecting late/recurrent AF and its association with coronary artery bypass grafting (CABG) outcomes in a real-world setting. METHODS From 2012 through 2016, 5175 patients were included. Independent factors associated with late/recurrent AF were identified in a competing risk setting. Cox proportional hazard regression was used to evaluate the association between late/recurrent AF and study outcomes, consisting of all-cause mortality, major adverse cardio-cerebrovascular events, acute coronary syndrome, cerebrovascular events, and heart failure admissions. RESULTS During a median follow-up of 60 months (quartile 1-quartile 3, 59.3-60.7 months), late/recurrent AF developed in 85 patients (1.64%). Independent factors associated with late/recurrent AF were age (subdistribution hazard ratio [sHR], 1.04; 95% CI, 1.02-1.07), left-ventricular ejection fraction (sHR, 0.97; 95% CI, 0.95-0.99), length of stay (sHR, 1.02; 95% CI, 1.01-1.04), and POAF (sHR, 4.02; 95% CI, 2.50-6.45). Late/recurrent AF was not significantly associated with all-cause mortality and major adverse cardio-cerebrovascular events at unadjusted or adjusted levels (adjusted hazard ratio, 0.80 [95% CI, 0.50-1.28] and 0.74 [95% CI, 0.48-1.13], respectively). Nevertheless, it significantly increased the unadjusted risk of cerebrovascular events (hazard ratio, 2.28; 95% CI, 01.07-4.87), which disappeared after adjustments. CONCLUSIONS Patients with advanced age, a lower left-ventricular ejection fraction, and POAF are more likely to have late/recurrent clinical AF. Albeit counterintuitive, late/recurrent AF was not independently associated with worse midterm post-CABG outcomes. These observations need to be further elucidated in larger-scale studies and interpreted in the context of a developing country with limited resources for late AF surveillance.
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Affiliation(s)
- Mana Jameie
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Malihe Rezaee
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mina Pashang
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Arash Jalali
- Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Department of Epidemiology and Biostatistics, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Amirmohammad Khalaji
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Behnoush
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Aida Fallahzadeh
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Sheikhy
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzad Masoudkabir
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ahmadi Tafti
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahram Momtahen
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Soheil Mansourian
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Kaveh Hosseini
- Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran; Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Tashak Golroudbari H, Banikarimi SP, Ayati A, Hadizadeh A, Khorasani Zavareh Z, Hajikhani K, Heirani-Tabasi A, Ahmadi Tafti M, Davoodi S, Ahmadi Tafti H. Advanced micro-/nanotechnologies for exosome encapsulation and targeting in regenerative medicine. Clin Exp Med 2023; 23:1845-1866. [PMID: 36705868 DOI: 10.1007/s10238-023-00993-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Accepted: 01/05/2023] [Indexed: 01/28/2023]
Abstract
Exosomes, a subset of vesicles generated from cell membranes, are crucial for cellular communication. Exosomes' innate qualities have been used in recent studies to create nanocarriers for various purposes, including medication delivery and immunotherapy. As a result, a wide range of approaches has been designed to utilize their non-immunogenic nature, drug-loading capacity, or targeting ability. In this study, we aimed to review the novel methods and approaches in exosome engineering for encapsulation and targeting in regenerative medicine. We have assessed and evaluated each method's efficacy, advantages, and disadvantages and discussed the results of related studies. Even though the therapeutic role of non-allogenic exosomes has been demonstrated in several studies, their application has certain limitations as these particles are neither fully specific to target tissue nor tissue retainable. Hence, there is a strong demand for developing more efficient encapsulation methods along with more accurate and precise targeting methods, such as 3D printing and magnetic nanoparticle loading in exosomes, respectively.
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Affiliation(s)
- Hasti Tashak Golroudbari
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Seyedeh Parnian Banikarimi
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Tissue Engineering and Regenerative Medicine, School of Advanced Technologies in Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Aryan Ayati
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Hadizadeh
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Khorasani Zavareh
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Kiana Hajikhani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Asieh Heirani-Tabasi
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohsen Ahmadi Tafti
- Colorectal Surgery Research Center, Imam Hospital Complex, Tehran University of Medical Sciences, Tehran, Iran
| | - Saeed Davoodi
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ahmadi Tafti
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran.
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5
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Ghamkhari A, Tafti HA, Rabbani S, Ghorbani M, Ghiass MA, Akbarzadeh F, Abbasi F. Ultrasound-Triggered Microbubbles: Novel Targeted Core-Shell for the Treatment of Myocardial Infarction Disease. ACS Omega 2023; 8:11335-11350. [PMID: 37008126 PMCID: PMC10061684 DOI: 10.1021/acsomega.3c00067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 02/07/2023] [Indexed: 06/19/2023]
Abstract
Myocardial infarction (MI) is known as a main cardiovascular disease that leads to extensive cell death by destroying vasculature in the affected cardiac muscle. The development of ultrasound-mediated microbubble destruction has inspired extensive interest in myocardial infarction therapeutics, targeted delivery of drugs, and biomedical imaging. In this work, we describe a novel therapeutic ultrasound system for the targeted delivery of biocompatible microstructures containing basic fibroblast growth factor (bFGF) to the MI region. The microspheres were fabricated using poly(lactic-co-glycolic acid)-heparin-polyethylene glycol- cyclic arginine-glycine-aspartate-platelet (PLGA-HP-PEG-cRGD-platelet). The micrometer-sized core-shell particles consisting of a perfluorohexane (PFH)-core and a PLGA-HP-PEG-cRGD-platelet-shell were prepared using microfluidics. These particles responded adequately to ultrasound irradiation by triggering the vaporization and phase transition of PFH from liquid to gas in order to achieve microbubbles. Ultrasound imaging, encapsulation efficiency cytotoxicity, and cellular uptake of bFGF-MSs were evaluated using human umbilical vein endothelial cells (HUVECs) in vitro. In vivo imaging demonstrated effective accumulation of platelet- microspheres injected into the ischemic myocardium region. The results revealed the potential use of bFGF-loaded microbubbles as a noninvasive and effective carrier for MI therapy.
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Affiliation(s)
- Aliyeh Ghamkhari
- Institute
of Polymeric Materials and Faculty of Polymer Engineering, Sahand University of Technology, Tabriz 5331817634, Iran
| | - Hossein Ahmadi Tafti
- Research
Center for Advanced Technologies in Cardiovascular Medicine, Tehran
Heart Center, Tehran University of Medical
Sciences, Tehran 1416753955, Iran
| | - Shahram Rabbani
- Research
Center for Advanced Technologies in Cardiovascular Medicine, Tehran
Heart Center, Tehran University of Medical
Sciences, Tehran 1416753955, Iran
| | - Marjan Ghorbani
- Nutrition
Research Center, Tabriz University of Medical Sciences, Tabriz IR 51656-65811, Iran
| | - Mohammad Adel Ghiass
- Tissue
Engineering Department, Tarbiat Modares
University, Tehran 1411713116, Iran
| | - Fariborz Akbarzadeh
- Cardiovascular
Research Center, Tabriz University of Medical
Sciences, Tabriz 5166/15731, Iran
| | - Farhang Abbasi
- Institute
of Polymeric Materials and Faculty of Polymer Engineering, Sahand University of Technology, Tabriz 5331817634, Iran
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Rezaee M, Fallahzadeh A, Sheikhy A, Jameie M, Behnoush AH, Pashang M, Tajdini M, Tavolinejad H, Masoudkabir F, Mansourian S, Momtahen S, Tafti HA, Hosseini K. BMI modifies HDL-C effects on coronary artery bypass grafting outcomes. Lipids Health Dis 2022; 21:128. [PMID: 36447289 PMCID: PMC9710033 DOI: 10.1186/s12944-022-01739-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 07/24/2022] [Accepted: 11/17/2022] [Indexed: 12/05/2022] Open
Abstract
BACKGROUND Despite the recognized implications of high-density lipoprotein cholesterol (HDL-C) in cardiovascular diseases, the role of body mass index (BMI) in HDL-C association with cardiovascular outcomes remains unclear. This study investigated the possible modifying implications of BMI on the correlation between HDL-C and coronary artery bypass grafting (CABG) outcomes. METHODS The present cohort included isolated CABG patients (median follow-up: 76.58 [75.79-77.38] months). The participants were classified into three groups: 18.5 ≤ BMI < 25 (normal), 25 ≤ BMI < 30 (overweight), and 30 ≤ BMI < 35 (obese) kg/m2. Cox proportional hazard models (CPHs) and restricted cubic splines (RCSs) were applied to evaluate the relationship between HDL-C and all-cause mortality as well as major adverse cardio-cerebrovascular events (MACCEs) in different BMI categories. RESULTS This study enrolled a total of 15,639 patients. Considering the final Cox analysis among the normal and overweight groups, HDL-C ≥ 60 was a significant protective factor compared to 40 < HDL-C < 60 for all-cause mortality (adjusted hazard ratio (aHR): 0.47, P: 0.027; and aHR: 0.64, P: 0.007, respectively). However, the protective effect of HDL-C ≥ 60 was no longer observed among patients with 30 ≤ BMI < 35 (aHR: 1.16, P = 0.668). RCS trend analyses recapitulated these findings; among 30 ≤ BMI < 35, no uniform inverse linear association was observed; after approximately HDL-C≈55, its increase was no longer associated with reduced mortality risk. RCS analyses on MACCE revealed a plateau effect followed by a modest rise in overweight and obese patients from HDL-C = 40 onward (nonlinear association). CONCLUSIONS Very high HDL-C (≥ 60 mg/dL) was not related to better outcomes among obese CABG patients. Furthermore, HDL-C was related to the post-CABG outcomes in a nonlinear manner, and the magnitude of its effects also differed across BMI subgroups.
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Affiliation(s)
- Malihe Rezaee
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411600.2Medical Student Research Committee, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Aida Fallahzadeh
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Endocrinology and Metabolism Population Sciences Institute, Non-Communicable Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Sheikhy
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Endocrinology and Metabolism Population Sciences Institute, Non-Communicable Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mana Jameie
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Endocrinology and Metabolism Population Sciences Institute, Non-Communicable Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Hossein Behnoush
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Endocrinology and Metabolism Population Sciences Institute, Non-Communicable Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mina Pashang
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Masih Tajdini
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamed Tavolinejad
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Endocrinology and Metabolism Population Sciences Institute, Non-Communicable Disease Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Farzad Masoudkabir
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Soheil Mansourian
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahram Momtahen
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ahmadi Tafti
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Kaveh Hosseini
- grid.411705.60000 0001 0166 0922Tehran Heart Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiac Primary Prevention Research Center, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran ,grid.411705.60000 0001 0166 0922Cardiology Department, Tehran Heart Center, Tehran University of Medical Sciences, North Karegar Ave, P.O. Box: 1411713138, Tehran, Iran
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7
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Shokri M, Dalili F, Kharaziha M, Baghaban Eslaminejad M, Ahmadi Tafti H. Strong and bioactive bioinspired biomaterials, next generation of bone adhesives. Adv Colloid Interface Sci 2022; 305:102706. [PMID: 35623113 DOI: 10.1016/j.cis.2022.102706] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 04/20/2022] [Accepted: 05/15/2022] [Indexed: 12/29/2022]
Abstract
The bone adhesive is a clinical requirement for complicated bone fractures always articulated by surgeons. Applying glue is a quick and easy way to fix broken bones. Adhesives, unlike conventional fixation methods such as wires and sutures, improve healing conditions and reduce postoperative pain by creating a complete connection at the fractured joint. Despite many efforts in the field of bone adhesives, the creation of a successful adhesive with robust adhesion and appropriate bioactivity for the treatment of bone fractures is still in its infancy. Because of the resemblance of the body's humid environment to the underwater environment, in the latest decades, researchers have pursued inspiration from nature to develop strong bioactive adhesives for bone tissue. The aim of this review article is to discuss the recent state of the art in bone adhesives with a specific focus on biomimetic adhesives, their action mechanisms, and upcoming perspective. Firstly, the adhesive biomaterials with specific affinity to bone tissue are introduced and their rational design is studied. Consequently, various types of synthetic and natural bioadhesives for bone tissue are comprehensively overviewed. Then, bioinspired-adhesives are described, highlighting relevant structures and examples of biomimetic adhesives mainly made of DOPA and the complex coacervates inspired by proteins secreted in mussel and sandcastle worms, respectively. Finally, this article overviews the challenges of the current bioadhesives and the future research for the improvement of the properties of biomimetic adhesives for use as bone adhesives.
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Affiliation(s)
- Mahshid Shokri
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Faezeh Dalili
- School of Metallurgy & Materials Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran
| | - Mahshid Kharaziha
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
| | - Mohamadreza Baghaban Eslaminejad
- Department of Stem Cells and Developmental Biology, Cell Sciences Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran.
| | - Hossein Ahmadi Tafti
- Tehran Heart Hospital Research Center, Tehran University of Medical Sciences, Tehran, Iran
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8
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Heidari A, Elkhodary KI, Pop C, Badran M, Vali H, Abdel-Raouf YMA, Torbati S, Asgharian M, Steele RJ, Mahmoudzadeh Kani I, Sheibani S, Pouraliakbar H, Sadeghian H, Cecere R, Friedrich MGW, Tafti HA. Patient-specific finite element analysis of heart failure and the impact of surgical intervention in pulmonary hypertension secondary to mitral valve disease. Med Biol Eng Comput 2022; 60:1723-1744. [PMID: 35442004 DOI: 10.1007/s11517-022-02556-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 03/12/2022] [Indexed: 12/31/2022]
Abstract
Pulmonary hypertension (PH), a chronic and complex medical condition affecting 1% of the global population, requires clinical evaluation of right ventricular maladaptation patterns under various conditions. A particular challenge for clinicians is a proper quantitative assessment of the right ventricle (RV) owing to its intimate coupling to the left ventricle (LV). We, thus, proposed a patient-specific computational approach to simulate PH caused by left heart disease and its main adverse functional and structural effects on the whole heart. Information obtained from both prospective and retrospective studies of two patients with severe PH, a 72-year-old female and a 61-year-old male, is used to present patient-specific versions of the Living Heart Human Model (LHHM) for the pre-operative and post-operative cardiac surgery. Our findings suggest that before mitral and tricuspid valve repair, the patients were at risk of right ventricular dilatation which may progress to right ventricular failure secondary to their mitral valve disease and left ventricular dysfunction. Our analysis provides detailed evidence that mitral valve replacement and subsequent chamber pressure unloading are associated with a significant decrease in failure risk post-operatively in the context of pulmonary hypertension. In particular, right-sided strain markers, such as tricuspid annular plane systolic excursion (TAPSE) and circumferential and longitudinal strains, indicate a transition from a range representative of disease to within typical values after surgery. Furthermore, the wall stresses across the RV and the interventricular septum showed a notable decrease during the systolic phase after surgery, lessening the drive for further RV maladaptation and significantly reducing the risk of RV failure.
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Affiliation(s)
- Alireza Heidari
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montreal, QC, H3A 0C3, Canada. .,Department of Anatomy & Cell Biology, McGill University, Montreal, QC, Canada.
| | - Khalil I Elkhodary
- Department of Mechanical Engineering, American University in Cairo, New Cairo, 11835, Egypt
| | - Cristina Pop
- Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Mohamed Badran
- Department of Mechanical Engineering, Future University in Egypt, New Cairo, Egypt
| | - Hojatollah Vali
- Department of Anatomy & Cell Biology, McGill University, Montreal, QC, Canada
| | - Yousof M A Abdel-Raouf
- Department of Mechanical Engineering, American University in Cairo, New Cairo, 11835, Egypt
| | - Saeed Torbati
- School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Masoud Asgharian
- Department of Mathematics and Statistics, McGill University, Montreal, QC, Canada
| | - Russell J Steele
- Department of Mathematics and Statistics, McGill University, Montreal, QC, Canada
| | | | - Sara Sheibani
- Department of Anatomy & Cell Biology, McGill University, Montreal, QC, Canada
| | - Hamidreza Pouraliakbar
- Rajaie Cardiovascular Medical and Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Hakimeh Sadeghian
- Faculty of Medicine, Tehran University of Medical Science, Tehran, Iran.,Department of Surgery, Tehran Heart Center, Tehran, Iran
| | - Renzo Cecere
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke Street West, Montreal, QC, H3A 0C3, Canada.,Department of Surgery, Royal Victoria Hospital, McGill University Health Centre, Montreal, QC, Canada
| | - Matthias G W Friedrich
- Departments of Medicine and Diagnostic Radiology, McGill University, Montreal, QC, Canada
| | - Hossein Ahmadi Tafti
- Faculty of Medicine, Tehran University of Medical Science, Tehran, Iran.,Department of Surgery, Tehran Heart Center, Tehran, Iran
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Ayati A, Sarraf S, Asl Fallah S, Bagheri J, Ahmadi Tafti H, Same K, Hosseini K. Aortic dissection in the first trimester; is it a dead end? A narrative review of recent articles. J Card Surg 2022; 37:1705-1711. [PMID: 35352396 DOI: 10.1111/jocs.16451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 02/13/2022] [Accepted: 02/17/2022] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Acute-type aortic dissection (AD) during pregnancy is considered a rare and potentially fatal complication for both mother and fetus. Although the definite treatment for an acute-type AD is considered to be open-heart surgery, the decision to perform such a surgery during pregnancy requires a multidisciplinary approach and carries significant risks. METHODS In the present review of the literature, we have discussed various challenges in the management of acute-type AD during pregnancy, including therapeutic approaches, choosing the preferred imaging modalities, surgical techniques, and medication challenges. We have also reported an 8-week pregnant woman with Marfan syndrome who presented with chest pain and was diagnosed with acute AD. RESULTS The patient underwent a Bentall operation and was discharged in good condition with her fetus alive. The medical team's various decisions during preoperative, operative, and postoperative treatments were discussed. CONCLUSIONS Type A AD is considered infrequent in the second and third trimester of pregnancy and rare in the first trimester. Performing a CMR study without contrast in stable patients can help evaluate the extension of the flap. Urgent surgery in the hands of a skilled surgeon may prove lifesaving for the mother while maximizing the likelihood of preserving the fetus.
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Affiliation(s)
- Aryan Ayati
- Tehran Heart Center, Tehran Heart Center Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Syna Sarraf
- Tehran Heart Center, Tehran Heart Center Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Sahar Asl Fallah
- Rajaie Cardiovascular Medical And Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Jamshid Bagheri
- Tehran Heart Center, Tehran Heart Center Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Hossein Ahmadi Tafti
- Tehran Heart Center, Tehran Heart Center Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Kaveh Same
- Tehran Heart Center, Tehran Heart Center Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Kaveh Hosseini
- Tehran Heart Center, Tehran Heart Center Research Institute, Tehran University of Medical Sciences, Tehran, Iran
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10
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Shokri M, Kharaziha M, Tafti HA, Eslaminejad MB, Aghdam RM. Synergic role of zinc and gallium doping in hydroxyapatite nanoparticles to improve osteogenesis and antibacterial activity. Materials Science and Engineering: C 2022; 134:112684. [DOI: 10.1016/j.msec.2022.112684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/14/2022] [Accepted: 01/22/2022] [Indexed: 10/19/2022]
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11
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Kiaie N, Emami SH, Rabbani S, Aghdam RM, Tafti HA. Targeted and Controlled Drug Delivery to a Rat Model of Heart Failure Through a Magnetic Nanocomposite. Ann Biomed Eng 2019; 48:709-721. [PMID: 31696331 DOI: 10.1007/s10439-019-02394-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [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: 08/04/2019] [Accepted: 10/25/2019] [Indexed: 01/03/2023]
Abstract
As a novel cardiac myosin activator, Omecamtive Mecarbil (OM) has shown promising results in the management of systolic heart failure in clinical examinations. However, the need for repeated administration along with dose-dependent side effects made its use elusive as a standard treatment for heart failure (HF). We hypothesized that improved cardiac function in systolic HF models would be achieved in lower doses by targeted delivery of OM to the heart. To test this hypothesis, a nanocomposite system was developed by composing chitosan and a magnetic core (Fe3O4), loaded with OM, and directed toward the rats' heart via a 0.3 T magnet. HF-induced rats were injected with saline, OM, and OM-loaded nanocomposite (n = 8 in each group) and compared with a group of healthy animals (saline injected, n = 8). Knowing the ejection fraction (EF) of healthy (93.68 ± 1.37%) and HF (71.7 ± 1.41%) rats, injection of nanocomposites was associated with improved EF (EF = 89.6 ± 1.40%). Due to increased heart targeting of nanocomposite (2.5 folds), improved cardiac function was seen with only 4% of the OM dose required for infusion, while injecting the same dose of OM without targeting was unable to stop HF progression (EF = 55.33 ± 3.16%) during 7 days. In conclusion, heart nanocomposites targeting improves the EF by up to 18% by only using 4% of the doses traditionally used in treating the HF.
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Affiliation(s)
- Nasim Kiaie
- Department of Tissue Engineering, Amirkabir University of Technology, Tehran, Iran
| | | | - Shahram Rabbani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Hossein Ahmadi Tafti
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran.
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12
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Hajighasemi S, Mahdavi Gorabi A, Bianconi V, Pirro M, Banach M, Ahmadi Tafti H, Reiner Ž, Sahebkar A. A review of gene- and cell-based therapies for familial hypercholesterolemia. Pharmacol Res 2019; 143:119-132. [DOI: 10.1016/j.phrs.2019.03.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 03/10/2019] [Accepted: 03/20/2019] [Indexed: 12/20/2022]
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13
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Gorabi AM, Hajighasemi S, Khori V, Soleimani M, Rajaei M, Rabbani S, Atashi A, Ghiaseddin A, Saeid AK, Ahmadi Tafti H, Sahebkar A. Functional biological pacemaker generation by T-Box18 protein expression via stem cell and viral delivery approaches in a murine model of complete heart block. Pharmacol Res 2019; 141:443-450. [PMID: 30677516 DOI: 10.1016/j.phrs.2019.01.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 01/09/2019] [Accepted: 01/17/2019] [Indexed: 11/26/2022]
Abstract
Despite recent advances in the treatment of cardiac arrhythmia, the available options are still limited and associated with some complications. Induction of biological pacemakers via Tbx18 gene insertion in the heart tissue has been suggested as a promising therapeutic strategy for cardiac arrhythmia. Following a previous in vitro study reporting the production of Tbx18-expressing human induced pluripotent stem cell-derived cardiomyocytes (hiPS-CMs), we aimed to investigate the efficacy of these engineered cells to generate pacemaker rhythms in a murine model of complete heart block. We also attempted to generate a functional pacemaker by Tbx18 overexpression in native cardiac cells of rat heart. The hiPSC-derived pacemaker cells were produced by lentiviral delivery of Tbx18 gene to stem cells during a small molecule-based differentiation process. In the present study, 16 male albino Wistar rats were randomly assigned to Tbx18-lentivirus (n = 4) and Tbx18-pacemaker cells (n = 4) administered via injection into the left ventricular anterolateral wall. The control rats received GFP-lentiviruses (n = 4) and GFP-pacemaker cells (n = 4). Fourteen days after the injection, the rats were sacrificed and analyzed by electrocardiography (ECG) recording using a Langendorff-perfused heart model following complete heart block induced by hypokalemia and crashing. Immunofluorescence staining was used to investigate the expression of Tbx18, HCN4 and connexin 43 (Cx43) proteins in Tbx18-delivered cells of heart tissues. The heart rate was significantly reduced after complete heart block in all of the experimental rats (P < 0.05). Heart beating in the Tbx18-transduced hearts was slower compared with rats receiving Tbx18-pacemaker cells (P = 0.04). The duration of ventricular fibrillation (VF) was higher in the lentiviral Tbx18 group compared with the GFP-injected controls (P = 0.02) and the Tbx18-pacemaker cell group (P = 0.02). The ECG recording data showed spontaneous pacemaker rhythms in both intervention groups with signal propagation in Tbx18-transduced ventricles. Immunostaining results confirmed the overexpression of HCN4 and downregulation of Cx43 as a result of the expression of the Tbx18 gene and spontaneously contracting myocyte formation. We confirmed the formation of a functional pacemaker after introduction of Tbx18 via cell and gene therapy strategies. Although the pacemaker activity was better in gene-received hearts since there were longer VF duration and signal propagation from the injection site, more data should be gathered from the long-term activity of such pacemakers in different hosts.
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Affiliation(s)
- Armita Mahdavi Gorabi
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Iran
| | - Saeideh Hajighasemi
- Department of Medical Biotechnology, Faculty of Paramedicine, Qazvin University of Medical Sciences, Qazvin, Iran
| | - Vahid Khori
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Masoud Soleimani
- Department of Hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Maryam Rajaei
- Ischemic Disorders Research Center, Golestan University of Medical Sciences, Gorgan, Iran
| | - Shahram Rabbani
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Iran
| | - Amir Atashi
- Stem Cell and Tissue Engineering Research Center, Shahroud University of Medical Sciences, Shahroud, Iran
| | | | - Ali Kazemi Saeid
- Department of Cardiology, Tehran University of Medical Science, Tehran, Iran; Research Department, Laboratory of Dr. Stanley Nattel, Montreal Heart Institute Research Center, Montreal University, Montreal, Canada.
| | - Hossein Ahmadi Tafti
- Research Center for Advanced Technologies in Cardiovascular Medicine, Tehran Heart Center, Tehran University of Medical Sciences, Iran.
| | - Amirhossein Sahebkar
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Tehran, Iran; Neurogenic Inflammation Research Center, Mashhad University of Medical Sciences, Tehran, Iran; School of Medicine, Mashhad University of Medical Sciences, Tehran, Iran
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14
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Basiri Z, Rezayan AH, Akbari B, Aghdam RM, Tafti HA. Developing new synthetic biomimetic nanocomposite adhesives: Synthesis and evaluation of bond strength and solubilization. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.04.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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15
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Ghiaseddin A, Pouri H, Soleimani M, Vasheghani-Farahani E, Ahmadi Tafti H, Hashemi-Najafabadi S. Cell laden hydrogel construct on-a-chip for mimicry of cardiac tissue in-vitro study. Biochem Biophys Res Commun 2017; 484:225-230. [PMID: 28082203 DOI: 10.1016/j.bbrc.2017.01.029] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 01/07/2017] [Indexed: 01/06/2023]
Abstract
Since the leading cause of death are cardiac diseases, engineered heart tissue (EHT) is one of the most appealing topics defined in tissue engineering and regenerative medicine fields. The importance of EHT is not only for heart regeneration but also for in vitro developing of cardiology. Cardiomyocytes could grow and commit more naturally in their microenvironment rather than traditional cultivation. Thus, this research tried to develop a set up on-a-chip to produce EHT based on chitosan hydrogel. Micro-bioreactor was hydrodynamically designed and simulated by COMSOL and produced via soft lithography process. Chitosan hydrogel was also prepared, adjusted, and assessed by XRD, FTIR and also its degradation rate and swelling ratio were determined. Finally, hydrogels in which mice cardiac progenitor cells (CPC) were loaded were injected into the micro-device chambers and cultured. Each EHT in every chamber was evaluated separately. Prepared EHTs showed promising results that expanded in them CPCs and work as an integrated syncytium. High cell density culture was the main accomplishment of this study.
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Affiliation(s)
- Ali Ghiaseddin
- Biomedical Engineering Group, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Hossein Pouri
- Biomedical Engineering Group, Faculty of Chemical Engineering, Tarbiat Modares University, Tehran, Iran
| | - Masoud Soleimani
- Hematology Group, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
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Tabesh H, Tafti HA, Ameri S, Jalali A, Kashanivahid N. Evaluation of Quality Of Life after Cardiac Surgery in High-Risk Patients. Heart Surg Forum 2015; 17:E277-81. [DOI: 10.1532/hsf98.2014357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
<p><b>Background:</b> Conventionally, there is controversy over subjecting high-risk patients to cardiac operations, due to major postoperative complications. Higher survival rates and less morbidity as well as better quality of life can be good predictors of the outcome of surgery. This study evaluates the quality of life before and 12 months after cardiac operations on high-risk patients.</p><p><b>Methods:</b> In this study, the European System for Cardiac Operative Risk Evaluation (EuroSCORE) II was used to separate high-risk patients from others. The quality of life was assessed using the Medical Outcomes Study 36-item Short Form Health Survey (SF-36) before surgery and one year afterward. Based on SF-36, the score for each of the eight different dimensions of the quality of life was quantified; and, their differences between pre-surgery and post-follow up period were analyzed.</p><p><b>Results:</b> 126 high-risk patients were included in this study. The mean age of the patients was 64.29 � 12.35 years. The median of EuroSCORE II score in these cases was 6.83 (6.04-25.98). The results reveal that the majority of the quality of life dimensions, except mental health, improved significantly after the follow-up period.</p><p><b>Conclusion:</b> Cardiac surgery on high-risk patients can noticeably promote the different aspects of their quality of life; although, such improvements should be considered against surgical complications.</p>
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17
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Hamedani BA, Navidbakhsh M, Tafti HA. Comparison between mechanical properties of human saphenous vein and umbilical vein. Biomed Eng Online 2012; 11:59. [PMID: 22917177 PMCID: PMC3527163 DOI: 10.1186/1475-925x-11-59] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [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: 01/16/2012] [Accepted: 08/14/2012] [Indexed: 11/10/2022] Open
Abstract
Background As a main cause of mortality in developed countries, Coronary Artery Disease (CAD) is known as silent killer with a considerable cost to be dedicated for its treatment. Coronary Artery Bypass Graft (CABG) is a common remedy for CAD for which different blood vessels are used as a detour. There is a lack of knowledge about mechanical properties of human blood vessels used for CABG, and while these properties have a great impact on long-term patency of a CABG. Thus, studying these properties, especially those of human umbilical veins which have not been considered yet, looks utterly necessary. Methods Umbilical vein, as well as human Saphenous vein, are respectively obtained after cesarean and CABG. First, histological tests were performed to investigate different fiber contents of the samples. Having prepared samples carefully, force-displacement results of samples were rendered to real stress–strain measurements and then a fourth-order polynomial was used to prove the non-linear behavior of these two vessels. Results Results were analyzed in two directions, i.e. circumferentially and longitudinally, which then were compared with each other. The comparison between stiffness and elasticity of these veins showed that Saphenous vein’s stiffness is much higher than that of umbilical vein and also, it is less stretchable. Furthermore, for both vessels, longitudinal stiffness was higher than that of circumferential and in stark contrast, stretch ratio in circumferential direction came much higher than longitudinal orientation. Conclusion Blood pressure is very high in the region of aorta, so there should be a stiff blood vessel in this area and previous investigations showed that stiffer vessels would have a better influence on the flow of bypass. To this end, the current study has made an attempt to compare these two blood vessels’ stiffness, finding that Saphenous vein is stiffer than umbilical vein which is somehow as stiff as rat aortic vessels. As blood vessel’s stiffness is directly related to elastin and mainly collagen content, results showed the lower amount of these two contents in umbilical vein regarding Saphenous vein.
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Affiliation(s)
- Borhan Alhosseini Hamedani
- Biomechanics Lab, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran.
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Najafi M, Haghighat B, Tafti HA. Relationship between serum magnesium level and arrythmias following post-coronary artery bypass grafting. Middle East J Anaesthesiol 2007; 19:661-672. [PMID: 18044293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
INTRODUCTION Atrial and ventricular arrhythmias are among the most common complications after coronary artery bypass graft (CABG) surgery. It is known that cardiopulmonary bypass reduces serum magnesium level. In this study, we evaluated the relationship between total blood magnesium level (TMG) and the incidence of perioperative arrhythmias. METHODS TMG was measured in patients who were scheduled for CABG on three occasions: just before anesthesia, on intensive care unit (ICU) arrival and on the first morning after operation. Patients were evaluated for primary cardiac rhythm, serum creatinine, urine output in operating room and diuretic therapy. Supplemental magnesium (SMG) was also recorded in operating room and ICU. Patients were then evaluated for the rate and kind of arrhythmia occurring during the next 3 days. RESULTS Mean TMG level in 170 cases was 2.2 (0.5), 2.6 (0.6) and 2.4 (0.6) mg/dl on three occasions respectively. 53 patients developed post-operative arrhythmia (31%) [Atrial Fibrillation (AF) (7.1%), Non-AF Supraventricular arrhythmia (14.7%) and Ventricular arrhythmia (16.5%)]. Although there was a significant difference between TMG on three occasions (P <0.001), all values were within normal range. Although TMG was higher in arrhythmic patients compared to non- arrhythmics (2.26 vs. 2.14), both values were in normal range and there was no significant difference between two groups. DISCUSSION This study shows that routine magnesium administration has no significant effect on serum magnesium level. We conclude that though routine regimen of magnesium administration has no effect on incidence of perioperative arrhythmia, it is probably necessary for maintaining normal magnesium level.
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Affiliation(s)
- Mahdi Najafi
- Tehran Heart Center, Tehran University of Medical Sciences, Tehran, Iran.
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Najafi M, Hamidian R, Haghighat B, Fallah N, Tafti HA, Karimi A, Boroumand MA. Magnesium infusion and postoperative atrial fibrillation: a randomized clinical trial. Acta Anaesthesiol Taiwan 2007; 45:89-94. [PMID: 17694684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
BACKGROUND Postoperative arrhythmias are among the most common complications of cardiac surgery. Total serum magnesium concentration will change after coronary bypass surgery but compensatory prophylactic administration of magnesium has remained a controversial issue. We studied whether prophylactic administration of magnesium could prevent post-coronary artery bypass grafting (CABG) arrhythmias and evaluated the effects of diabetes mellitus on prophylactic magnesium administration. METHODS In a clinical trial, 345 consecutive CABG candidates were randomly assigned to study (n = 166, 48.1%) and control groups. Patients in study group received supplemental magnesium infusion as following: 2 g [corrected] after induction of anesthesia until cardio-pulmonary bypass and then 8 g upon arrival in Intensive Care Unit (ICU) until 24 hr. Total serum magnesium concentration was measured at four designated time points: onset of induction, and 0, 24 and 48 hr after ICU admission. Cardiac arrhythmias were sought with a 12-lead electrocardiogram (ECG) from the end of surgery up till discharge. RESULTS Atrial Fibrillation (Af) occurred in 34 patients (9.9%). Total serum magnesium concentration was significantly higher in patients who received supplemental magnesium (P < 0.001) and significantly lower in Af patients (P= 0.02). Among non-diabetics, Af incidence was significantly lower in study group compared with control group. CONCLUSIONS The occurrence of atrial fibrillation correlates with serum magnesium level. Diabetes mellitus probably hampers prophylactic effect of supplemental magnesium in preventing the occurrence of Af.
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Affiliation(s)
- Mahdi Najafi
- Tehran Heart Center, Medical Sciences/University of Tehran, Tehran, Iran.
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