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Erlandsson L, Ohlsson L, Masoumi Z, Rehnström M, Cronqvist T, Edvinsson L, Hansson SR. Preliminary evidence that blocking the uptake of placenta-derived preeclamptic extracellular vesicles protects the vascular endothelium and prevents vasoconstriction. Sci Rep 2023; 13:18425. [PMID: 37891193 PMCID: PMC10611745 DOI: 10.1038/s41598-023-45830-9] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023] Open
Abstract
Preeclampsia (PE) is a pregnancy syndrome characterized by hypertension and organ damage manifesting after 20 gestational weeks. The etiology is of multifactorial origin, where placental stress causes increased levels of placenta-derived extracellular vesicles (STBEVs) in the maternal circulation, shown to cause inflammation, endothelial activation, vasoconstriction, and anti-angiogenic activity. General endothelial dysfunction is believed to be initiated by endothelial insult during pregnancy that alters vascular function resulting in increased arterial stiffness, cardiac dysfunction, and increased risk of cardiovascular disease later in life. We compared the effect of normal and PE derived STBEVs in vitro on vascular contractility of human subcutaneous arteries using wire myography. Cellular structures of exposed vessels were investigated by transmission electron microscopy. We explored strategies to pharmacologically block the effects of the STBEVs on human vessels. The PE STBEVs caused significantly stronger angiotensin II-mediated contractions and extended structural damage to human subcutaneous arteries compared to normal STBEVs. These negative effects could be reduced by blocking vesicle uptake by endothelial cells, using chlorpromazine or specific antibodies towards the LOX-1 receptor. The therapeutic potential of blocking vesicle uptake should be further explored, to reduce the permanent damage caused on the vasculature during PE pregnancy to prevent future cardiovascular risk.
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Affiliation(s)
- Lena Erlandsson
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, BMC C14, Klinikgatan 28, 221 85, Lund, Sweden.
| | - Lena Ohlsson
- Experimental Vascular Research, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Zahra Masoumi
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, BMC C14, Klinikgatan 28, 221 85, Lund, Sweden
| | - Mimmi Rehnström
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, BMC C14, Klinikgatan 28, 221 85, Lund, Sweden
| | - Tina Cronqvist
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, BMC C14, Klinikgatan 28, 221 85, Lund, Sweden
| | - Lars Edvinsson
- Experimental Vascular Research, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
- Skåne University Hospital, Lund, Sweden
| | - Stefan R Hansson
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, BMC C14, Klinikgatan 28, 221 85, Lund, Sweden
- Skåne University Hospital, Lund, Sweden
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2
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Tsutsumi N, Masoumi Z, James SC, Tucker JA, Winkelmann H, Grey W, Picton LK, Moss L, Wilson SC, Caveney NA, Jude KM, Gati C, Piehler J, Hitchcock IS, Garcia KC. Structure of the thrombopoietin-MPL receptor complex is a blueprint for biasing hematopoiesis. Cell 2023; 186:4189-4203.e22. [PMID: 37633268 PMCID: PMC10528194 DOI: 10.1016/j.cell.2023.07.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 06/26/2023] [Accepted: 07/28/2023] [Indexed: 08/28/2023]
Abstract
Thrombopoietin (THPO or TPO) is an essential cytokine for hematopoietic stem cell (HSC) maintenance and megakaryocyte differentiation. Here, we report the 3.4 Å resolution cryoelectron microscopy structure of the extracellular TPO-TPO receptor (TpoR or MPL) signaling complex, revealing the basis for homodimeric MPL activation and providing a structural rationalization for genetic loss-of-function thrombocytopenia mutations. The structure guided the engineering of TPO variants (TPOmod) with a spectrum of signaling activities, from neutral antagonists to partial- and super-agonists. Partial agonist TPOmod decoupled JAK/STAT from ERK/AKT/CREB activation, driving a bias for megakaryopoiesis and platelet production without causing significant HSC expansion in mice and showing superior maintenance of human HSCs in vitro. These data demonstrate the functional uncoupling of the two primary roles of TPO, highlighting the potential utility of TPOmod in hematology research and clinical HSC transplantation.
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Affiliation(s)
- Naotaka Tsutsumi
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA; Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama 700-8530, Japan.
| | - Zahra Masoumi
- York Biomedical Research Institute, Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Sophie C James
- York Biomedical Research Institute, Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Julie A Tucker
- York Biomedical Research Institute, Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Hauke Winkelmann
- Department of Biology/Chemistry and Center of Cellular Nanoanalytics, Osnabrück University, 49076 Osnabrück, Germany
| | - William Grey
- York Biomedical Research Institute, Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Lora K Picton
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Lucie Moss
- York Biomedical Research Institute, Department of Biology, University of York, Heslington, York YO10 5DD, UK
| | - Steven C Wilson
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Nathanael A Caveney
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Kevin M Jude
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Cornelius Gati
- Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA; Biosciences Division, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
| | - Jacob Piehler
- Department of Biology/Chemistry and Center of Cellular Nanoanalytics, Osnabrück University, 49076 Osnabrück, Germany
| | - Ian S Hitchcock
- York Biomedical Research Institute, Department of Biology, University of York, Heslington, York YO10 5DD, UK.
| | - K Christopher Garcia
- Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Structural Biology, Stanford University School of Medicine, Stanford, CA 94305, USA; Howard Hughes Medical Institute, Stanford University School of Medicine, Stanford, CA 94305, USA.
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3
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Mohammadi F, Sadeghian E, Masoumi Z, Oshvandi K, Bijani M. Psychiatric nurses' perception of dignity in patients who attempted suicide. Nurs Ethics 2023; 30:871-884. [PMID: 37057588 DOI: 10.1177/09697330221146237] [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] [Indexed: 04/15/2023]
Abstract
BACKGROUND Maintaining the dignity of patients who attempted suicide is one of the caregivers' main ethical duties. Yet, in many cases, these patients are not treated with dignity. The concept of dignity is abstract, and there is no research on the dignity of suicidal patients. So, the present study is done to investigate psychiatric nurses' perception of dignity in patients who attempted suicide. OBJECTIVE The present study explores the concept of dignity in patients who attempted suicide from the perspective of psychiatric nurses. RESEARCH DESIGN The present study is a qualitative, descriptive work of research. PARTICIPANTS AND RESEARCH CONTEXT A total of 20 psychiatric nurses from 2 hospitals affiliated with a university of medical sciences in the southeast of Iran were selected via purposeful sampling. ETHICAL CONSIDERATIONS The Research Ethics Committee of the Hamadan University of Medical Sciences approved the study's protocol, and ethical principles were followed in general. FINDINGS From the findings of the study, three main themes, namely " respect for personal; identity," "management of psychological tension," and "compassion-focused therapy," with 12 sub-themes were extracted. DISCUSSION AND CONCLUSION In the perspective of caregivers, patients who attempted suicide need to be cared for in supportive environments with compassionate and respectful behaviors to control their psychological tensions. These conditions would maintain such patients' dignity and result in appropriate behavioral outcomes. Policy-makers and administrators can use the present study's findings to create an appropriate clinical environment in which the dignity of patients who attempted suicide is properly maintained.
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Affiliation(s)
- Fateme Mohammadi
- Chronic Diseases(Home Care) Research Center and Autism Spectrum Disorders Research Center, Department of Nursing, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Efat Sadeghian
- Chronic Diseases (Home care) Research Center, Department of Nursing, School of Nursing and Midwifery, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Masoumi
- Mother and Child Care Research Center, Department of Midwifery, School of Nursing and Midwifery, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Khodayar Oshvandi
- Mother and Child Care Research Center, Department of Medical Surgical Nursing, School of Nursing and Midwifery, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mostafa Bijani
- Department of Medical Surgical Nursing, School of Nursing, Fasa University of Medical Sciences, Fasa, Iran
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Mobed A, Gholami S, Tahavvori A, Ghazi F, Masoumi Z, Alipourfard I, Naderian R, Mohammadzadeh M. Nanosensors in the detection of antihypertension drugs, a golden step for medication adherence monitoring. Heliyon 2023; 9:e19467. [PMID: 37810167 PMCID: PMC10558620 DOI: 10.1016/j.heliyon.2023.e19467] [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: 05/02/2023] [Revised: 08/16/2023] [Accepted: 08/23/2023] [Indexed: 10/07/2023] Open
Abstract
Hypertension is associated with structural and functional changes in blood vessels with increased arteriosclerosis, vascular inflammation, and endothelial dysfunction. Decreased adherence (compliance) to antihypertensive medications contributes significantly to morbidity and mortality in hypertensive patients. Antihypertensive drugs (AHTDs) and lifestyle changes are the main cornerstones for treating hypertension. Several approaches have been described in the literature for determining AHTDs based on different analytical techniques. Amongst biosensors are one of the most attractive tools due to their inherent advantages. Biosensors are used for the detection of wide range of biomarkers as well as different drugs in past two decades. The main focus of the present study is to review the latest biosensors developed for the detection of AHTDs. Readers of the present study will be able to familiarize themselves with biosensors as advanced and modern diagnostic tools while reviewing the most widely used AHTDs. In the present study, the routine methods are first reviewed and while examining their advantages and disadvantages, biosensors have been introduced as ideal alternative tools.
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Affiliation(s)
- Ahmad Mobed
- Neuroscience Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sarah Gholami
- Young Researchers and Ellie Club, Babol Branch. Islamic Azad University, Babol, Iran
| | - Amir Tahavvori
- Internal Department, Medical Faculty, Urmia University of Medical Sciences, Iran
| | - Farhood Ghazi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, 5154853431, Iran
| | - Zahra Masoumi
- Student Research Committee, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Iraj Alipourfard
- Institute of Biology, Biotechnology and Environmental Protection, Faculty of Natural Sciences, University of Silesia, Katowice, Poland
| | - Ramtin Naderian
- Student Committee of Medical Education Development, Education Development Center, Semnan University of Medical Science, Iran
- Student Research Committee, Semnan University of Medical Sciences, Semnan, Iran
| | - Mehran Mohammadzadeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, 5154853431, Iran
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Masoumi Z, Moaveni B, Mousavi Gazafrudi SM, Faiz J. Air-gap eccentricity fault detection, isolation, and estimation for synchronous generators based on eigenvalues analysis. ISA Trans 2022; 131:489-500. [PMID: 35562305 DOI: 10.1016/j.isatra.2022.04.038] [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] [Subscribe] [Scholar Register] [Received: 12/04/2021] [Revised: 04/10/2022] [Accepted: 04/22/2022] [Indexed: 06/15/2023]
Abstract
Air-gap eccentricity fault causes rotor-stator rub and consequently damage to Synchronous Generators (SGs). In this paper, a fault diagnosis approach to diagnose the eccentricity fault for SGs is presented. In this approach, the state matrix eigenvalues based on the subspace identification are estimated, and those are used for fault diagnosis. Two dq models of SGs in faulty and healthy conditions are employed to present the theoretical foundation of the method. As the main advantage, the introduced fault diagnosis method is working properly for either linear or nonlinear loads of SGs. The stator and field currents and voltages, and rotor rotational speed are required signals in the introduced approach. The method is validated using experimental data of SGs in Iran-Safir (ER24) diesel-electric locomotives.
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Affiliation(s)
- Zahra Masoumi
- School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran.
| | - Bijan Moaveni
- Faculty of Electrical Engineering, Center of Excellence for Modeling and Control of Complex Systems, K. N. Toosi University of Technology, Tehran, Iran.
| | | | - Jawad Faiz
- School of Electrical & Computer Engineering, University of Tehran, Tehran, Iran.
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6
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Mohammadi F, Masoumi Z, Oshvandi K, Khazaei S, Bijani M. Death anxiety, moral courage, and resilience in nursing students who care for COVID-19 patients: a cross-sectional study. BMC Nurs 2022; 21:150. [PMID: 35698221 PMCID: PMC9189788 DOI: 10.1186/s12912-022-00931-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [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: 01/30/2022] [Accepted: 06/03/2022] [Indexed: 12/15/2022] Open
Abstract
Background Being on the frontline of the battle against COVID-19, nurses and nursing students have been under considerable psychological stress and pressure. The present study is done to explore death anxiety, moral courage, and resilience in nursing students caring for COVID-19 patients in the south of Iran. Methods The present study is cross-sectional research conducted between September and December 2021. A total of 420 senior nursing students (nursing interns) who were undergoing their clinical training courses were invited to participate in the study by convenience sampling method from three hospitals affiliated with the University of Medical Sciences of Southern Iran. Data were collected using a demographics survey, Nurses’ Moral Courage Questionnaire, Connor-Davidson Resilience Scale, and Templer’s Death Anxiety Scale. Results The nursing students participating in this study had a death anxiety mean score of 12.78 ± 1.17. The results showed that there was a significant and indirect correlation between death anxiety on the one hand and moral courage (r = -0.91, p < 0.001) and resilience (r = -0.89, p < 0.001) on the other in nursing students caring for patients with COVID-19. Also, it was found that there was a significant and direct correlation between the students’ resilience and moral courage scores (r = 0.91, p < 0.001). Conclusion The nursing students caring for COVID-19 patients had experienced high levels of death anxiety in the past few months. Considering the persistence of the COVID-19 crisis in Iran and other countries, there is an urgent need for measures to preserve and improve the physical, mental, and spiritual health of nursing students, enhance their moral courage and resilience and reduce their death anxiety.
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Affiliation(s)
- Fateme Mohammadi
- Chronic Diseases (Home Care) Research Center and Autism Spectrum Disorders Research Center, Department of Nursing, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Masoumi
- Department of Nursing, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Khodayar Oshvandi
- Mother and Child Care Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Salman Khazaei
- Department of Epidemiology, School of Health , Health Sciences Research Center, Health Sciences & Technology Research Institue, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Mostafa Bijani
- Department of Medical Surgical Nursing, Fasa University of Medical Sciences, Fasa, Iran.
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7
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Erlandsson L, Masoumi Z, Hansson LR, Hansson SR. The roles of free iron, heme, haemoglobin, and the scavenger proteins haemopexin and alpha-1-microglobulin in preeclampsia and fetal growth restriction. J Intern Med 2021; 290:952-968. [PMID: 34146434 DOI: 10.1111/joim.13349] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [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] [Indexed: 11/27/2022]
Abstract
BACKGROUND Preeclampsia (PE) is a complex pregnancy syndrome characterised by maternal hypertension and organ damage after 20 weeks of gestation and is associated with an increased risk of cardiovascular disease later in life. Extracellular haemoglobin (Hb) and its metabolites heme and iron are highly toxic molecules and several defence mechanisms have evolved to protect the tissue. OBJECTIVES We will discuss the roles of free iron, heme, Hb, and the scavenger proteins haemopexin and alpha-1-microglobulin in pregnancies complicated by PE and fetal growth restriction (FGR). CONCLUSION In PE, oxidative stress causes syncytiotrophoblast (STB) stress and increased shedding of placental STB-derived extracellular vesicles (STBEV). The level in maternal circulation correlates with the severity of hypertension and supports the involvement of STBEVs in causing maternal symptoms in PE. In PE and FGR, iron homeostasis is changed, and iron levels significantly correlate with the severity of the disease. The normal increase in plasma volume taking place during pregnancy is less for PE and FGR and therefore have a different impact on, for example, iron concentration, compared to normal pregnancy. Excess iron promotes ferroptosis is suggested to play a role in trophoblast stress and lipotoxicity. Non-erythroid α-globin regulates vasodilation through the endothelial nitric oxide synthase pathway, and hypoxia-induced α-globin expression in STBs in PE placentas is suggested to contribute to hypertension in PE. Underlying placental pathology in PE with and without FGR might be amplified by iron and heme overload causing oxidative stress and ferroptosis. As the placenta becomes stressed, the release of STBEVs increases and affects the maternal vasculature.
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Affiliation(s)
- Lena Erlandsson
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Zahra Masoumi
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Lucas R Hansson
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Stefan R Hansson
- Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden.,Obstetrics and Gynecology, Skåne University Hospital, Lund/Malmö, Sweden
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8
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Mashinchi B, Aryannejad A, Namazi M, Moradi S, Masoumi Z, Parsaei A, Masoumi M. A case of C-ANCA-positive systematic lupus erythematous and ANCA-associated vasculitis overlap syndrome superimposed by COVID-19: a fatal trio. Mod Rheumatol Case Rep 2021; 7:117-121. [PMID: 34480174 PMCID: PMC8499895 DOI: 10.1093/mrcr/rxab007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 03/11/2021] [Accepted: 05/14/2021] [Indexed: 01/07/2023]
Abstract
Coronavirus disease 2019 (COVID-19) poses a substantial challenge for rheumatologists and rheumatologic patients. They are concerned about the reciprocal interaction between connective tissue diseases, such as systemic lupus erythematosus (SLE), and the virus. Here, we report a 21-year-old female SLE patient presented to the emergency department with gastrointestinal symptoms and kidney involvement evidence. Based on the pathology and laboratory assessments, she was suspected of C-antineutrophil cytoplasmic antibody (ANCA) positive SLE and ANCA-associated vasculitis overlap syndrome (SLE/AAV OS), and plasmapheresis was performed every other day due to this diagnosis alongside the high titer of C-ANCA. We also administered methylprednisolone [1 g/day, intravenous (IV)] for 3 days, followed by dexamethasone with the maintenance dosage (1 mg/kg/day, IV). Although the patient's general condition improved the next days, her condition deteriorated suddenly on the 7th day of hospitalisation. She got intubated and went to the intensive care unit. Despite taking possible measures to manage the patient's condition, she eventually passed away due to severe acute respiratory distress syndrome, triggered by COVID-19. The distinct role of C-ANCA in SLE/AAV vascular damage and activating neutrophil cytokine release accompanied by the impaired immune system while facing COVID-19 seems to lead to increased morbidity and mortality in such patients. This report is presented to bring into consideration the possible role of C-ANCA in the prognosis of COVID-19 in SLE/AAV OS patients.
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Affiliation(s)
| | | | - Mansoor Namazi
- Clinical Research Center and Development, Qom University of Medical Sciences, Qom, Iran
| | - Soroush Moradi
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Masoumi
- Clinical Research Center and Development, Qom University of Medical Sciences, Qom, Iran
| | | | - Maryam Masoumi
- Corresponding Author: Maryam Masoumi, Clinical Research and Development Center, Qom University of Medical Sciences and Health Services, Qom, Iran, E-mail: , phone: +98919-012-3098, Fax: +9825-3612-2000, Postal code: 3719964797
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Familari M, Cronqvist T, Masoumi Z, Hansson SR. Placenta-derived extracellular vesicles: their cargo and possible functions. Reprod Fertil Dev 2018; 29:433-447. [PMID: 26411402 DOI: 10.1071/rd15143] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Accepted: 08/29/2015] [Indexed: 12/15/2022] Open
Abstract
The literature on extracellular vesicles consists of rapidly expanding and often contradictory information. In this paper we attempt to review what is currently known regarding extracellular vesicles released specifically from human placental syncytiotrophoblast cells with a focus on the common but complex pregnancy-associated syndrome pre-eclampsia, where the level of syncytiotrophoblast extracellular vesicle release is significantly increased. We review common methods for syncytiotrophoblast extracellular vesicle derivation and isolation and we discuss the cargo of syncytiotrophoblast extracellular vesicles including proteins, RNA and lipids and their possible functions. A meta-analysis of available trophoblast-derived extracellular vesicle proteomic datasets revealed only three proteins in common: albumin, fibronectin-1 and plasminogen activator inhibitor-1, suggesting some variability in vesicle cargo, most likely reflecting stage and cell type of origin. We discuss the possible sources of variability that may have led to the low number of common markers, which has led us to speculate that markers and density in common use may not be strict criteria for identifying and isolating placenta-derived exosomes.
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Affiliation(s)
- Mary Familari
- School of Biosciences, University of Melbourne, Parkville, Vic. 3010, Australia
| | - Tina Cronqvist
- Lund University, Department of Clinical Sciences, Lund, Obstetrics and Gynecology, Klinikgatan 28, 221 85 Lund, Sweden
| | - Zahra Masoumi
- Lund University, Department of Clinical Sciences, Lund, Obstetrics and Gynecology, Klinikgatan 28, 221 85 Lund, Sweden
| | - Stefan R Hansson
- Lund University, Department of Clinical Sciences, Lund, Obstetrics and Gynecology, Klinikgatan 28, 221 85 Lund, Sweden
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Babakhani N, Taravati M, Masoumi Z, Garousian M, Faradmal J, Shayan A. The Effect of Cognitive-Behavioral Consultation on Sexual Function among Women: a Randomized Clinical Trial. J Caring Sci 2018; 7:83-88. [PMID: 29977878 PMCID: PMC6029649 DOI: 10.15171/jcs.2018.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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: 03/01/2017] [Accepted: 12/10/2017] [Indexed: 11/09/2022] Open
Abstract
Introduction: Sexual dysfunction is one of the most common causes of family breakdowns. In recent years, various approaches have been proposed to resolve this issue. The present study was carried out in order to examine the effect of cognitive-behavioral consultation on sexual function among women who had referred to health centers in Hamadan. Method: A randomized clinical trial was conducted in two groups. It focused on 198 qualified women who had referred to selected health centers of Hamadan in 2016. The participants were selected by simple random sampling (99 people in each group).The intervention group received four 2-hour sessions of cognitive-behavioral group consultation. The required data were collected using a questionnaire of demographic characteristics and Female Sexual Function Index (FSFI). For ethical considerations, by the end of the study, sexual counseling for the control group was provided. To analyze the collected data, SPSS 13 was employed; t-test was used for independent samples. ANCOVA was also utilized. The significance level was set at 0.05. Results: The results showed that the two groups were not significantly different in terms of mean pretest scores in all domains, except for sexual satisfaction and total sexual function. However, after cognitive-behavioral consultation sessions, the intervention group experienced a significant increase in all behavioral domains and total sexual function as compared to the control group. Conclusion: Cognitive-behavioral consultation among women can play a positive and effective role in improving sexual relationships. Therefore, the effectiveness of this type of consultation can be confirmed with more certainty.
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Affiliation(s)
- Narges Babakhani
- Department Midwifery, Faculty of Nursing and Midwifery, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Masumeh Taravati
- Department Midwifery, Faculty of Nursing and Midwifery, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Masoumi
- Department Midwifery, Mother and Child Care Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Maryam Garousian
- Fatemieh Hospital, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Javad Faradmal
- Department of Biostatistics, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Arezoo Shayan
- Department Midwifery, Faculty of Nursing and Midwifery, Chronic Diseases (Home Care) Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
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Taravati M, Shayan A, Babakhani N, Garousian M, Faradmal J, Masoumi Z. The Effect of Group Sexual Counseling Based on Cognitive Behavioural Approach on Sexual Satisfaction of Women. J Clin Diagn Res 2018. [DOI: 10.7860/jcdr/2018/34102.12416] [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] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Masoumi Z, Ekström N, Casslén V, Erlandsson L, Mezey E, Hansson S. The role of hypoxia as the driving force for non-erythroid production of globin chains in preeclamptic placentas. Placenta 2017. [DOI: 10.1016/j.placenta.2017.07.300] [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: 12/01/2022]
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Tarhriz V, Wagner KD, Masoumi Z, Molavi O, Hejazi MS, Ghanbarian H. CDK9 Regulates Apoptosis of Myoblast Cells by Modulation of microRNA-1 Expression. J Cell Biochem 2017; 119:547-554. [PMID: 28608935 DOI: 10.1002/jcb.26213] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [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: 04/10/2017] [Accepted: 06/12/2017] [Indexed: 11/09/2022]
Abstract
Cdk9 is the catalytic core of the positive transcription elongation factor b (P-TEFb) and regulates transcriptional elongation factors by phosphorylation of RNA pol II. Apart from its role on myogenic gene expression, Cdk9 regulation of muscle-specific microRNAs in the early stage of cardiomyogenesis is poorly understood. Here we demonstrate that Cdk9 not only regulates myogenic transcription factors, but also controls muscle-specific microRNAs. During cardiac differentiation of mouse embryonic stem cells, high Cdk9 expression preceded up-regulation of miR-1. To investigate potential regulatory roles of Cdk9 on cardiac microRNAs and myogenesis genes, we overexpressed Cdk9 in myoblast C2C12 cells, which resulted in significant induction of miR-1 and miR-206, while miR-133 was downregulated. Moreover, expression levels of MyoD and Srf, key regulators of myogenesis, also increased in cells with overexpression of Cdk9. We further observed Cdk9-mediated apoptosis in C2C12 cells corresponding to induction of miR-1 expression levels. Thus, Cdk9 plays a complex role in myocyte progenitor differentiation and apoptosis by regulating myogenic protein and muscle-specific microRNA expression. J. Cell. Biochem. 119: 547-554, 2018. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Vahideh Tarhriz
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Zahra Masoumi
- Department of Molecular Biology and Genetic Engineering, Stem Cell Technology Research Center, Tehran, Iran.,Faculty of Medicine, Division of Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Ommoleila Molavi
- Faculty of Pharmacy, Department of Pharmaceutical Biotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Saeid Hejazi
- Molecular Medicine Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Faculty of Pharmacy, Department of Pharmaceutical Biotechnology, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Ghanbarian
- Department of Biotechnology, School of Advanced Technologies in Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Biology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Masoumi Z, Ekström N, Casslén V, Erlandsson L, Mezey E, Hansson S. P 31 The role of hypoxia as the driving force for nonerythroid production of globin chains in preeclamptic placentas. Pregnancy Hypertens 2017. [DOI: 10.1016/j.preghy.2017.07.109] [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] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Masoumi Z, Familari M, Källén K, Ranstam J, Olofsson P, Hansson SR. Fetal hemoglobin in umbilical cord blood in preeclamptic and normotensive pregnancies: A cross-sectional comparative study. PLoS One 2017; 12:e0176697. [PMID: 28453539 PMCID: PMC5409527 DOI: 10.1371/journal.pone.0176697] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 04/14/2017] [Indexed: 12/14/2022] Open
Abstract
Preeclampsia (PE) is associated with increased fetal hemoglobin (HbF) in the maternal circulation but its source is unknown. To investigate whether excessive HbF is produced in the placenta or the fetus, the concentration of HbF (cHbF) in the arterial and venous umbilical cord blood (UCB) was compared in 15825 normotensive and 444 PE pregnancies. The effect of fetal gender on cHbF was also evaluated in both groups. Arterial and venous UCB sampled immediately after birth at 36–42 weeks of gestation were analyzed for total Hb concentration (ctHb) (g/L) and HbF% using a Radiometer blood gas analyzer. Non-parametric tests were used for statistical comparison and P values < 0.05 were considered significant. Our results indicated higher cHbF in venous compared to arterial UCB in both normotensive (118.90 vs 117.30) and PE (126.75 vs 120.12) groups. In PE compared to normotensive pregnancies, a significant increase was observed in arterial and venous ctHb (171.00 vs 166.00 and 168.00 vs 163.00, respectively) while cHbF was only significantly increased in venous UCB (126.75 vs 118.90). The pattern was similar in both genders. These results indicate a substantial placental contribution to HbF levels in UCB, which increases in PE and is independent of fetal gender, suggesting the elevated cHbF evident in PE results from placental dysfunction.
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Affiliation(s)
- Zahra Masoumi
- Department of Clinical Sciences Lund, Division of Obstetrics and Gynecology, Lund University, Lund, Sweden
- * E-mail:
| | - Mary Familari
- School of Biosciences, University of Melbourne, Parkville, Australia
| | - Karin Källén
- Center for Reproductive Epidemiology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Jonas Ranstam
- Department of Clinical Sciences Lund, Division of Orthopedics, Faculty of Medicine, Lund University, Lund, Sweden
| | - Per Olofsson
- Department of Clinical Sciences Malmö, Division of Obstetrics and Gynecology, Lund University, Skåne University Hospital, Malmö, Sweden
| | - Stefan R. Hansson
- Department of Clinical Sciences Lund, Division of Obstetrics and Gynecology, Lund University, Lund, Sweden
- Department of Clinical Sciences Malmö, Division of Obstetrics and Gynecology, Lund University, Skåne University Hospital, Malmö, Sweden
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Vatanpour M, Azimi CH, Masoumi Z. Study of the Knowledge of Elementary School Health Teachers of Tehran City on How to Control Students’ Teeth Injuries at School in. J Res Dentomaxillofac Sci 2017. [DOI: 10.29252/jrdms.2.1.36] [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: 10/31/2022] Open
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17
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Hafizi M, Hajarizadeh A, Atashi A, Kalanaky S, Fakharzadeh S, Masoumi Z, Nazaran MH, Soleimani M. Nanochelating based nanocomplex, GFc7, improves quality and quantity of human mesenchymal stem cells during in vitro expansion. Stem Cell Res Ther 2015; 6:226. [PMID: 26597909 PMCID: PMC4657224 DOI: 10.1186/s13287-015-0216-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 04/25/2015] [Revised: 04/30/2015] [Accepted: 10/28/2015] [Indexed: 02/06/2023] Open
Abstract
Introduction Human mesenchymal stem cells (hMSCs) have been approved for therapeutic applications. Despite the advances in this field, in vitro approaches are still required to improve the essential indices that would pave the way to a bright horizon for an efficient transplantation in the future. Nanotechnology could help to improve these approaches. Studies signified the important role of iron in stem cell metabolism and efficiency of copper chelation application for stem cell expansion Methods For the first time, based on novel Nanochelating technology, we design an iron containing copper chelator nano complex, GFc7 and examined on hMSCs during in vitro expansion. In this study, the hMSCs were isolated, characterized and expanded in vitro in two media (with or without GFc7). Then proliferation, cell viability, cell cycle analysis, surface markers, HLADR, pluripotency genes expression, homing and antioxidative defense at genes and protein expression were investigated. Also we analyzed the spontaneous differentiation and examined osteogenic and lipogenic differentiation. Results GFc7 affected the expression of key genes, improving both the stemness and fitness of the cells in a precise and balanced manner. We observed significant increases in cell proliferation, enhanced expression of pluripotency genes and homing markers, improved antioxidative defense, repression of genes involved in spontaneous differentiation and exposing the hMSCs to differentiation medium indicated that pretreatment with GFc7 increased the quality and rate of differentiation. Conclusions Thus, GFc7 appears to be a potential new supplement for cell culture medium for increasing the efficiency of transplantation.
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Affiliation(s)
- Maryam Hafizi
- Stem Cell Technology Research Center, Tehran, Iran. .,Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran.
| | | | - Amir Atashi
- Department of Hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
| | - Somayeh Kalanaky
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran.
| | - Saideh Fakharzadeh
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran.
| | | | | | - Masoud Soleimani
- Department of Hematology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran.
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Masoumi Z, Familari M, Magnusson M, Mezey E, Hansson S. Characterizing the hematopoietic stem/progenitor cells in the placenta and umbilical cord blood from normal and preeclamptic subjects. Placenta 2015. [DOI: 10.1016/j.placenta.2015.07.361] [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: 10/23/2022]
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Parsa P, Masoumi Z, Parsa N, Parsa B. Parents' Health Beliefs Influence Breastfeeding Patterns among Iranian Women. Oman Med J 2015; 30:187-92. [PMID: 26171125 DOI: 10.5001/omj.2015.40] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 12/22/2014] [Accepted: 04/01/2015] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVES To determine factors related to breastfeeding and its perceived health benefits among Iranian mothers. METHODS A cross-sectional study was performed using 240 postpartum women who were selected randomly from eight public health care centers in Hamadan, Iran, in 2012. Mothers who breastfed (BF) and mothers who never breastfed (NBF) were given a structured questionnaire to collect their demographic data and information regarding their health beliefs and attitude towards child-rearing. Descriptive and logistic regression were used for data analysis. RESULTS The mean length of breastfeeding was 11.6 (standard deviation=12.5) weeks. There was no difference in demographic variables, such as age, type of medical insurance, number of living children, employment, education, and household income (p>0.050), between mothers that breastfed and those that did not. Mothers' perception of the severity of child illness was higher in those who breastfed than those who never breastfed (p=0.050). In contrast, BF mothers had higher perceived confidence of medical care to prevent diseases (p<0.050) and a higher perception of reverse parent-child roles than NBF mothers (p<0.050). CONCLUSION Mothers' health beliefs and attitude to parenting has a significant role in choosing to breastfeed. Physicians and healthcare providers may provide supportive information that influence a mother's breastfeeding behavior.
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Affiliation(s)
- Parisa Parsa
- Department of Mother and Child Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Masoumi
- Department of Midwifery, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Nakisa Parsa
- Department Child Development and Psychology, University Putra Malaysia, Serdang, Malaysia
| | - Bita Parsa
- Department of Professional Continuing Education, University Putra Malaysia, Serdang, Malaysia
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Fakharzadeh S, Sahraian MA, Hafizi M, Kalanaky S, Masoumi Z, Mahdavi M, Kamalian N, Minagar A, Nazaran MH. The therapeutic effects of MSc1 nanocomplex, synthesized by nanochelating technology, on experimental autoimmune encephalomyelitic C57/BL6 mice. Int J Nanomedicine 2014; 9:3841-53. [PMID: 25143732 PMCID: PMC4137990 DOI: 10.2147/ijn.s64630] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 12/04/2022] Open
Abstract
Purpose Currently approved therapies for multiple sclerosis (MS) at best only slow down its progression. Therefore, it is necessary to utilize novel technologies in order to synthesize smart multifunctional structures. In the present study, for the first time we evaluated the therapeutic potential of MSc1 nanocomplex, which was designed based on novel nanochelating technology. Materials and methods MSc1 cell-protection capacity, with and without iron bond, was evaluated against hydrogen peroxide (H2O2)-induced oxidative stress in cultured rat pheochromocytoma-12 cells. The ability of MSc1 to maintain iron bond at pH ranges of 1–7 was evaluated. Nanocomplex toxicity was examined by estimating the intraperitoneal median lethal dose (LD50). Experimental autoimmune encephalomyelitic mice were injected with MSc1 14 days after disease induction, when the clinical symptoms appeared. The clinical score, body weight, and disease-induced mortality were monitored until day 54. In the end, after collecting blood samples for assessing hemoglobin and red blood cell count, the brains and livers of the mice were isolated for hematoxylin and eosin staining and analysis of iron content, respectively. Results The results showed that MSc1 prevented H2O2-induced cell death even after binding with iron, and it preserved its bond with iron constant at pH ranges 1–7. The nanocomplex intraperitoneal LD50 was 1,776.59 mg/kg. MSc1 prompted therapeutic behavior and improved the disabling features of experimental autoimmune encephalomyelitis, which was confirmed by decreased clinical scores versus increased body mass and 100% survival probability. It did not cause any adverse effects on hemoglobin or red blood cell count. Histopathological studies showed no neural loss or lymphocyte infiltration in MSc1-treated mice, while the hepatic iron content was also normal. Conclusion These results demonstrate that MSc1 could be a promising beneficial novel agent and has the capacity to be evaluated in further studies.
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Affiliation(s)
- Saideh Fakharzadeh
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran
| | - Mohammad Ali Sahraian
- MS Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Maryam Hafizi
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran
| | - Somayeh Kalanaky
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran
| | - Zahra Masoumi
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran
| | - Mehdi Mahdavi
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran
| | - Nasser Kamalian
- Department of Pathology, Medical School of Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Minagar
- Department of Neurology, LSU Health Sciences Centre, Shreveport, LA, USA
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Hirata M, Tashiro Y, Aizawa K, Endo K, Hirata M, Tashiro Y, Endo K, Aizawa K, Serizawa K, Hirata M, Yogo K, Tashiro Y, Endo K, Cases A, Portoles J, Calls J, Martinez-Castelao A, Munar MA, Segarra A, Samouilidou E, Pantelias K, Petras D, Mpakirtzi T, Pipili C, Chatzivasileiou G, Vasiliou K, Denda E, Grapsa E, Tzanatos H, Shoji S, Inaba M, Tomosugi N, Okuno S, Ichii M, Yamakawa T, Kurihara S, Barsan L, Stanciu A, Stancu S, Capusa C, Bratescu L, Mircescu G, Barsan L, Stanciu A, Stancu S, Capusa C, Mircescu G, Kuo KL, Hung SC, Lee TS, Tarng DC, Nistor I, Covic A, Goldsmith D, Garrido P, Fernandes J, Ribeiro S, Vala H, Parada B, Alves R, Belo L, Costa E, Santos-Silva A, Reis F, Abdulnabi K, Ullah A, Abdulateef A, Howse M, Khalil A, Fouqueray B, Hoffmann M, Addison J, Manamley N, Stamopoulos D, Mpakirtzi N, Afentakis N, Grapsa E, Yu KH, Chou J, Klaus S, Schaddelee M, Kashiwa M, Takada A, Neff T, Galle J, Claes K, Di Giulio S, Guerin A, Herlitz H, Kiss I, Wirnsberger G, Manamley N, Addison J, Fouqueray B, Froissart M, Winearls C, Martinez Castelao A, Cases Amenos A, Torre Carballada A, Torralba Iranzo FJ, Bronsoms Artero JM, Toran Monserrat D, Valles Prats M, Merino JL, Espejo B, Bueno B, Amezquita Y, Paraiso V, Kiss Z, Kerkovits L, Ambrus C, Kulcsar I, Szegedi J, Benke A, Borbas B, Ferenczi S, Hengsperger M, Kazup S, Nagy L, Nemeth J, Rozinka A, Szabo T, Szelestei T, Toth E, Varga G, Wagner G, Zakar G, Gergely L, Kiss I, Exarchou K, Tanahill N, Anthoney A, Khalil A, Ahmed S, Capusa C, Oprican R, Stanciu A, Lipan M, Stancu S, Chirculescu B, Mircescu G, Ferenczi S, Roger S, Malecki R, Farouk M, Dellanna F, Thomas M, Manamley N, Touam M, Chantrel F, Bouiller M, Hurot JM, Raphael T, Testa A, Veillon S, Vendrely B, Masoumi Z, Ahmadpoor P, Ghaderian SMH, Nafar M, Samavat S, Samadian F, Poorrezagholi F, Shahidi M, Riccio E, Visciano B, Capuano I, Memoli A, Mozzillo G, Memoli B, Pisani A. Anaemia in CKD 1-5. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft131] [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] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fakharzadeh S, Kalanaky S, Hafizi M, Goya MM, Masoumi Z, Namaki S, Shakeri N, Abbasi M, Mahdavi M, Nazaran MH. The new nano-complex, Hep-c, improves the immunogenicity of the hepatitis B vaccine. Vaccine 2013; 31:2591-7. [PMID: 23583463 DOI: 10.1016/j.vaccine.2013.03.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 03/07/2013] [Accepted: 03/19/2013] [Indexed: 10/27/2022]
Abstract
Prevention of hepatitis B requires a vaccine that stimulates the humoral and cellular immune responses in a balanced manner, particularly those associated with Th1 and cytotoxic T cells. Alum adjuvant is currently used in the hepatitis B vaccine formulations but it lacks the efficiency of establishing such immune responses. Therefore, for accessing a suitable vaccine to prevent this fatal disease, it is essential to design and construct a new adjuvant which can overcome the limitations of the alum adjuvant and can stimulate a strong Th1 response as used along with it. In the present study, the adjuvant effect of Hep-c, the first nano-complex which was synthesized by nanochelating technology to improve the immunogenicity of the vaccine against hepatitis B, had been evaluated. Female Balb/c mice were divided into 7 groups and were injected with 10μg/ml of the hepatitis B vaccine and different doses of Hep-c for 3 times. Groups merely treated with the vaccine, Hep-c or phosphate buffered solution were used as control. Total specific antibody, IgG1, IgG2a, IgG2b, IgM, interleukin-4 (IL-4) and interferon-gamma (IFN-γ) levels were examined by the ELISA method. The proliferative response of the splenocytes was evaluated using bromodeoxyuridine assay. Results showed that immunization with hepatitis B vaccine and Hep-c increased the lymphocyte proliferation and specific IgM and IgG2a compared to the hepatitis B vaccine immunized group. Also, this nano-complex significantly increased the IFN-γ and IL-4 cytokine levels compared to the hepatitis B vaccine immunized group. Our findings show that Hep-c can not only preserve the alum capacity to effectively stimulate production of the antibodies but also cover its inefficiency in inducing Th1 response and prompting cellular immunity. Thus, by boosting the performance of the hepatitis B vaccine, it seemed that this nano-adjuvant has the suitable potential to be used in the commercial HBS vaccine formulation.
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Affiliation(s)
- Saideh Fakharzadeh
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran
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Havaei SA, Azimian A, Fazeli H, Naderi M, Ghazvini K, Samiee SM, Masoumi Z, Akbari M. Genetic Characterization of Methicillin Resistant and Sensitive, Vancomycin Intermediate Staphylococcus aureus Strains Isolated from Different Iranian Hospitals. ISRN Microbiol 2012; 2012:215275. [PMID: 23762750 PMCID: PMC3664199 DOI: 10.5402/2012/215275] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 11/22/2012] [Indexed: 11/23/2022]
Abstract
Background. Global concerns have been raised due to upward trend of Vancomycin Intermediate Staphylococcus aureus (VISA) and Vancomycin Resistant Staphylococcus aureus (VRSA) reports which mean casting doubt on the absolute effectiveness of the last line of antibiotic treatment for S. aureus, vancomycin. Hence, epidemiological evaluation can improve global health care policies. Methodology. 171 Isolates of Staphylococcus aureus were collected from different types of clinical samples in selected hospitals in Isfahan, Mashhad, and Tehran, Iran. Then, they were evaluated by agar screening, disk diffusion, and MIC method to determine their resistance to vancomycin and methicillin. The isolated VISA strains were then confirmed with genetic analysis by the evaluation of mecA and vanA genes, SCCmec, agr, and spa type, and also toxin profiles. MLST was also performed. Results and Conclusion. Our data indicated that 67% of isolated S. aureus strains were resistant to methicillin. Furthermore, five isolates (2.9%) had intermediate resistance to vancomycin (VISA). In contrast to usual association of VISA with MRSA strains, we found two isolates of MSSA-VISA. Therefore, our data suggests a probable parallel growing trend of VISA towards MSSA, along with MRSA strains. However, more samples are required to confirm these primarily data. Moreover, genetic analysis of the isolated VISA strains revealed that these strains are endemic Asian clones.
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Affiliation(s)
- Seyed Asghar Havaei
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, P.O. Box 73461-8174, Isfahan, Iran
| | - Amir Azimian
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, P.O. Box 73461-8174, Isfahan, Iran
| | - Hosein Fazeli
- Department of Microbiology, School of Medicine, Isfahan University of Medical Sciences, P.O. Box 73461-8174, Isfahan, Iran
| | - Mahmood Naderi
- Department of Medical Biotechnology, School of Medical Sciences, Tarbiat Modares University, Tehran, Iran
- Department of Molecular Biology and Genetic Engineering, Stem Cell Technology Research Center, Tehran, Iran
| | - Kiarash Ghazvini
- Department of Microbiology, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Siamak Mirab Samiee
- Food and Drug Laboratory Research Center, Ministry of Health and Medical Education, No. 408, Emam Khomeini Avenue, Tehran, Iran
- Reference Health Laboratories, Ministry of Health and Medical Education, Tehran, Iran
| | - Zahra Masoumi
- Department of Molecular Biology and Genetic Engineering, Stem Cell Technology Research Center, Tehran, Iran
| | - Mojtaba Akbari
- Department of Epidemiology, School of Medicine, Isfahan University of Medical Sciences, P.O. Box 73461-8174, Isfahan, Iran
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Masoumi Z, Stoeva V, Yekta A, Pang Z, Manners I, Winnik MA. Luminescence quenching method for probing the diffusivity of molecular oxygen in highly permeable media. Chem Phys Lett 1996. [DOI: 10.1016/0009-2614(96)01001-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Xu B, Yekta A, Li L, Masoumi Z, Winnik MA. The functionality of associative polymer networks: the association behavior of hydrophobically modified urethane-ethoxylate (HEUR) associative polymers in aqueous solution. Colloids Surf A Physicochem Eng Asp 1996. [DOI: 10.1016/0927-7757(96)03558-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
A new method is developed for analyzing the diffusion of oxygen in thin polymer films via fluorescence quenching measurements. We begin by reviewing previous methods, all of which involve approximations, for the measurement of permeability and diffusion coefficient by luminescence quenching; their shortcomings are clarified. An exact analytic theory is developed that successfully couples Fick's laws of diffusion to the Stern–Volmer equation of intensity quenching. Various modes of experimentation with polymeric films are considered. The equations we derive make the unexpected prediction that the rate of emission intensity decay when O2 diffuses into a polymer film is much faster than the rate of emission intensity enhancement when O2 diffuses out of the same film, even when the molecular diffusivity remains unchanged. Experiments show that this is indeed the observed behaviour. Keywords: diffusion coefficient, oxygen permeability, polymers, quenching, luminescence quenching, Fick's laws. Stern–Volmer equation.
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