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Nie M, Ren W, Ye X, Berglund M, Wang X, Fjordén K, Du L, Giannoula Y, Lei D, Su W, Li W, Liu D, Linderoth J, Jiang C, Bao H, Jiang W, Huang H, Hou Y, Zhu S, Enblad G, Jerkeman M, Wu K, Zhang H, Amini R, Li Z, Pan‐Hammarström Q. The dual role of CD70 in B-cell lymphomagenesis. Clin Transl Med 2022; 12:e1118. [PMID: 36471481 PMCID: PMC9722974 DOI: 10.1002/ctm2.1118] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 11/05/2022] [Accepted: 11/10/2022] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND CD70 is a costimulatory molecule that is transiently expressed on a small set of activated lymphocytes and is involved in T-cell-mediated immunity. However, the role of CD70 in B-cell malignancies remains controversial. METHODS We investigated the clinical relevance of CD70 genetic alterations and its protein expression in two diffuse large B-cell lymphoma (DLBCL) cohorts with different ethnic backgrounds. We also performed transcriptomic analysis to explore the role of CD70 alterations in tumour microenvironment. We further tested the blockade of CD70 in combination with PD-L1 inhibitor in a murine lymphoma model. RESULTS We showed that CD70 genetic aberrations occurred more frequently in the Chinese DLBCL cohort (56/233, 24.0%) than in the Swedish cohort (9/84, 10.8%), especially in those with concomitant hepatitis B virus (HBV) infection. The CD70 genetic changes in DLBCL resulted in a reduction/loss of protein expression and/or CD27 binding, which might impair T cell priming and were independently associated with poor overall survival. Paradoxically, we observed that over-expression of CD70 protein was also associated with a poor treatment response, as well as an advanced disease stage and EBV infection. More exhausted CD8+ T cells were furthermore identified in CD70 high-expression DLBCLs. Finally, in a murine lymphoma model, we demonstrated that blocking the CD70/CD27 and/or PD1/PD-L1 interactions could reduce CD70+ lymphoma growth in vivo, by directly impairing the tumour cell proliferation and rescuing the exhausted T cells. CONCLUSIONS Our findings suggest that CD70 can play a role in either tumour suppression or oncogenesis in DLBCL, likely via distinct immune evasion mechanisms, that is, impairing T cell priming or inducing T cell exhaustion. Characterisation of specific dysfunction of CD70 in DLBCL may thus provide opportunities for the development of novel targeted immuno-therapeutic strategies.
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Affiliation(s)
- Man Nie
- Department of Medical OncologyState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouChina
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
| | - Weicheng Ren
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
| | - Xiaofei Ye
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
| | - Mattias Berglund
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
- Department of ImmunologyGenetics and PathologyUppsala UniversityUppsalaSweden
| | - Xianhuo Wang
- Department of LymphomaNational Clinical Research Center of CancerKey Laboratory of Cancer Prevention and TherapyTianjin Medical University Cancer Institute and HospitalTianjinChina
| | - Karin Fjordén
- Department of OncologySkåne University HospitalLundSweden
| | - Likun Du
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
| | - Yvonne Giannoula
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
| | - Dexin Lei
- Department of Medical OncologyState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouChina
| | - Wenjia Su
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
| | - Wei Li
- Department of LymphomaNational Clinical Research Center of CancerKey Laboratory of Cancer Prevention and TherapyTianjin Medical University Cancer Institute and HospitalTianjinChina
| | - Dongbing Liu
- BGI‐ShenzhenShenzhenChina
- Guangdong Provincial Key Laboratory of Human Disease GenomicsShenzhen Key Laboratory of GenomicsBGI‐ShenzhenShenzhenChina
| | | | - Chengyi Jiang
- Department of HematologyJilin Cancer HospitalChangchunChina
| | - Huijing Bao
- Department of HematologyJilin Cancer HospitalChangchunChina
| | - Wenqi Jiang
- Department of Medical OncologyState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouChina
| | - Huiqiang Huang
- Department of Medical OncologyState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouChina
| | | | | | - Gunilla Enblad
- Department of ImmunologyGenetics and PathologyUppsala UniversityUppsalaSweden
| | - Mats Jerkeman
- Department of OncologySkåne University HospitalLundSweden
| | - Kui Wu
- BGI‐ShenzhenShenzhenChina
- Guangdong Provincial Key Laboratory of Human Disease GenomicsShenzhen Key Laboratory of GenomicsBGI‐ShenzhenShenzhenChina
| | - Huilai Zhang
- Department of LymphomaNational Clinical Research Center of CancerKey Laboratory of Cancer Prevention and TherapyTianjin Medical University Cancer Institute and HospitalTianjinChina
| | - Rose‐Marie Amini
- Department of ImmunologyGenetics and PathologyUppsala UniversityUppsalaSweden
| | - Zhi‐Ming Li
- Department of Medical OncologyState Key Laboratory of Oncology in South ChinaCollaborative Innovation Center for Cancer MedicineSun Yat‐sen University Cancer CenterGuangzhouChina
| | - Qiang Pan‐Hammarström
- Department of Biosciences and NutritionKarolinska InstitutetStockholmSweden
- Department of LymphomaNational Clinical Research Center of CancerKey Laboratory of Cancer Prevention and TherapyTianjin Medical University Cancer Institute and HospitalTianjinChina
- BGI‐ShenzhenShenzhenChina
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Amini R, Sahli M, Ganai S. Cigarette smoking and cognitive function among older adults living in the community. Neuropsychol Dev Cogn B Aging Neuropsychol Cogn 2020; 28:616-631. [PMID: 32783580 DOI: 10.1080/13825585.2020.1806199] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Background. The present study aimed to examine the long-term impact of CS on Executive Function (EF) and memory among older adults living in the community. Methods. Clock Drawing Test (CDT) and Delayed Word Recall Test (DWRT) were used to examine EF and memory, respectively, using four waves of National Health and Aging Trend Study. The respondents were asked whether they have ever smoked, length of smoking, and age of start and quit smoking. Results. CS can have a long-term impact on both EF and memory. However, current smoking can increase the risk of EF impairment compared to former smokers. Lung disease and current smoking can have a synergic effect of impairment in EF. Conclusion. In the long-term, smoking can negatively affect cognitive. Lung diseases and smoking can synergize their impacts on EF. The impact of smoking on cognition varies across ethnic groups; hence, educational programs targeting minorities can reduce discrepancies.
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Affiliation(s)
- R Amini
- Department of Public Health and Health Sciences, College of Health Sciences, University of Michigan-Flint , Flint, MI, USA
| | - M Sahli
- Department of Public Health and Health Sciences, College of Health Sciences, University of Michigan-Flint , Flint, MI, USA
| | - S Ganai
- Department of Public Health and Health Sciences, College of Health Sciences, University of Michigan-Flint , Flint, MI, USA
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3
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Persson Skare T, Sjöberg E, Berglund M, Smith RO, Roche FP, Lindskog C, Sander B, Glimelius I, Gholiha AR, Enblad G, Amini R, Claesson‐Welsh L. Marginal zone lymphoma expression of histidine‐rich glycoprotein correlates with improved survival. eJHaem 2020; 1:199-207. [PMID: 35847718 PMCID: PMC9175683 DOI: 10.1002/jha2.73] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 07/20/2020] [Accepted: 07/26/2020] [Indexed: 11/24/2022]
Abstract
Purpose The abundant hepatocyte‐expressed plasma protein histidine‐rich glycoprotein (HRG) enhances antitumor immunity by polarizing inflammatory and immune cells in several mouse models, however, the clinical relevance of HRG in human cancer is poorly explored. The expression and role of HRG in human B‐cell lymphomas was investigated in order to find new tools for prognosis and treatment. Findings Immunohistochemical (IHC) analysis and RNA hybridization of tissue microarrays showed that (i) HRG was expressed by tumor cells in marginal zone lymphoma (MZL), in 36% of 59 cases. Expression was also detected in follicular lymphoma (22%), mantle cell lymphoma (19%), and indiffuse large B‐cell lymphoma (DLBCL;5%) while primary CNS lymphoma (PCNSL) lacked expression of HRG. (ii) MZL patients positive for HRG showed a superior overall survival outcome (HR = 0.086, 95% CI = 0.014‐0.518, P‐value = .007), indicating a protective role for HRG independent of stage, age and sex. (iii) HRG‐expressing MZL displayed significantly increased transcript and protein levels of the host defense peptide alpha defensin 1. In addition, global transcript analyses showed significant changes in gene ontology terms relating to immunity and inflammation, however, infiltration of immune and inflammatory cells detected by IHC was unaffected by HRG expression. Conclusion HRG expression by MZL tumor cells correlates with an altered transcription profile and improved overall survival.
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Affiliation(s)
- Tor Persson Skare
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Elin Sjöberg
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Mattias Berglund
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Ross O Smith
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Francis P Roche
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Cecilia Lindskog
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Birgitta Sander
- Dept of Laboratory MedicineDivision of PathologyKarolinska Institutet and Karolinska University Hospital Stockholm Sweden
| | - Ingrid Glimelius
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Alex R Gholiha
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Gunilla Enblad
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Rose‐Marie Amini
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
| | - Lena Claesson‐Welsh
- Department of ImmunologyGenetics and PathologyScience for Life and Beijer Laboratoriesand Unit of Experimental and Clinical OncologyUppsala University Uppsala Sweden
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Abdulla M, Hollander P, Pandzic T, Mansouri L, Ednersson SB, Andersson P, Hultdin M, Fors M, Erlanson M, Degerman S, Petersen HM, Asmar F, Grønbæk K, Enblad G, Cavelier L, Rosenquist R, Amini R. Cell-of-origin determined by both gene expression profiling and immunohistochemistry is the strongest predictor of survival in patients with diffuse large B-cell lymphoma. Am J Hematol 2020; 95:57-67. [PMID: 31659781 PMCID: PMC6916573 DOI: 10.1002/ajh.25666] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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: 07/25/2019] [Revised: 10/18/2019] [Accepted: 10/18/2019] [Indexed: 12/16/2022]
Abstract
The tumor cells in diffuse large B‐cell lymphomas (DLBCL) are considered to originate from germinal center derived B‐cells (GCB) or activated B‐cells (ABC). Gene expression profiling (GEP) is preferably used to determine the cell of origin (COO). However, GEP is not widely applied in clinical practice and consequently, several algorithms based on immunohistochemistry (IHC) have been developed. Our aim was to evaluate the concordance of COO assignment between the Lymph2Cx GEP assay and the IHC‐based Hans algorithm, to decide which model is the best survival predictor. Both GEP and IHC were performed in 359 homogenously treated Swedish and Danish DLBCL patients, in a retrospective multicenter cohort. The overall concordance between GEP and IHC algorithm was 72%; GEP classified 85% of cases assigned as GCB by IHC, as GCB, while 58% classified as non‐GCB by IHC, were categorized as ABC by GEP. There were significant survival differences (overall survival and progression‐free survival) if cases were classified by GEP, whereas if cases were categorized by IHC only progression‐free survival differed significantly. Importantly, patients assigned as non‐GCB/ABC both by IHC and GEP had the worst prognosis, which was also significant in multivariate analyses. Double expression of MYC and BCL2 was more common in ABC cases and was associated with a dismal outcome. In conclusion, to determine COO both by IHC and GEP is the strongest outcome predictor to identify DLBCL patients with the worst outcome.
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Affiliation(s)
- Maysaa Abdulla
- Clinical and Experimental Pathology, Department of Immunology, Genetics and PathologyUppsala University Uppsala Sweden
| | - Peter Hollander
- Clinical and Experimental Pathology, Department of Immunology, Genetics and PathologyUppsala University Uppsala Sweden
| | - Tatjana Pandzic
- Medical Genetics and Genomics, Department of Immunology, Genetics and PathologyUppsala University Uppsala Sweden
| | - Larry Mansouri
- Department of Molecular Medicine and SurgeryKarolinska Institute Stockholm Sweden
| | | | - Per‐Ola Andersson
- Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
- Department of MedicineSödra Älvsborg Hospital Borås Borås Sweden
| | - Magnus Hultdin
- Department of Medical BiosciencesPathology, Umeå University Umeå Sweden
| | - Maja Fors
- Department of Medical BiosciencesPathology, Umeå University Umeå Sweden
| | - Martin Erlanson
- Department of Radiation Sciences, OncologyUmeå University Umeå Sweden
| | - Sofie Degerman
- Department of Medical BiosciencesPathology, Umeå University Umeå Sweden
| | - Helga Munch Petersen
- Department of PathologyCopenhagen University Hospital, Rigshospitalet Copenhagen Denmark
| | - Fazila Asmar
- Department of HematologyCopenhagen University Hospital, Rigshospitalet Copenhagen Denmark
| | - Kirsten Grønbæk
- Department of HematologyCopenhagen University Hospital, Rigshospitalet Copenhagen Denmark
| | - Gunilla Enblad
- Experimental and Clinical Oncology, Department of Immunology, Genetics and PathologyUppsala University Uppsala Sweden
| | - Lucia Cavelier
- Medical Genetics and Genomics, Department of Immunology, Genetics and PathologyUppsala University Uppsala Sweden
| | - Richard Rosenquist
- Department of Molecular Medicine and SurgeryKarolinska Institute Stockholm Sweden
| | - Rose‐Marie Amini
- Clinical and Experimental Pathology, Department of Immunology, Genetics and PathologyUppsala University Uppsala Sweden
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Khalili Dermani A, Kowsari E, Ramezanzadeh B, Amini R. Utilizing imidazole based ionic liquid as an environmentally friendly process for enhancement of the epoxy coating/graphene oxide composite corrosion resistance. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.07.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Valenzuela J, Stilson B, Amini R, Patanwala A, Adhikari S. 378 Prevalence and Follow-Up of Incidental Findings in Focused Assessment With Sonography for Trauma Examinations. Ann Emerg Med 2019. [DOI: 10.1016/j.annemergmed.2019.08.339] [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: 12/01/2022]
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7
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Baliakas P, Kättström M, Rossing M, Amini R. Refractory chronic "ITP": When platelet size matters. Clin Case Rep 2018; 6:1779-1780. [PMID: 30214762 PMCID: PMC6132098 DOI: 10.1002/ccr3.1711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 06/11/2018] [Indexed: 11/08/2022] Open
Abstract
Inherited conditions associated with thrombocytopenia should be included in the differential diagnosis of young patients with refractory immune thrombocytopenia (ITP), even in the absence of a positive family history. Early identification of such conditions is of vital importance in order to reach the right diagnosis and avoid unnecessary or even harmful medication.
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Affiliation(s)
- Panagiotis Baliakas
- Department of Clinical GeneticsUppsala University HospitalUppsalaSweden
- Science for Life LaboratoryDepartment of Immunology, Genetics and PathologyUppsala UniversityUppsalaSweden
| | - Magdalena Kättström
- Section of HematologyDepartment of MedicineÖrebro University HospitalÖrebroSweden
| | - Maria Rossing
- Center for Genomic MedicineCopenhagen University HospitalCopenhagenDenmark
| | - Rose‐Marie Amini
- Department of Immunology, Genetics and PathologyClinical and Experimental PathologyUppsala University and Uppsala University HospitalUppsalaSweden
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Abstract
OBJECTIVES Tobacco smoking and physical inactivity are among leading behavioral risk factors for ill health in older adults. This study considers how smoking is associated with physical activity. DESIGN Using a Life-Course model, data are analyzed regarding this relationship, controlling for, and interacted with, life-course and other factors. Daily smokers and sometimes smokers were hypothesized to engage in less leisure-time physical activity than those who never smoked, while those who stopped smoking were expected to do more than never smokers. Analyses were performed using SAS-Callable SUDAAN. SETTING AND PARTICIPANTS Secondary data from ten years of a national sample of adults aged 18 and over of the National Health Interview Survey, 2001-2010, are used (N = 264,945, missing data excluded, of 282,313 total cases). MEASUREMENTS Daily smokers, occasional smokers, and smoking quitters are compared to never smokers with regard to requisite physical activity (150 minutes per week of moderate, 100 of vigorous, and/or 50 of strengthening activity). Life-course measures include birth cohorts, age, and year of survey, as well as gender, race/ethnicity, and education. RESULTS Overall, hypotheses are supported regarding daily smokers and quitters; but the hypothesis is strongly rejected among sometimes smokers, who are much more likely to do requisite physical activity. Findings differ by age, sometimes smokers age 65 and over being less likely to do physical activity. Findings among all men are similar to the overall findings, while those among all women are similar to those for older respondents. Associations of smoking status with physical activity vary greatly by race/ethnicity. CONCLUSIONS Daily smokers may be most in need of both smoking cessation and leisure-time physical activity interventions. Smoking-cessation efforts may pay greater physical activity benefits among women and the aged, while smoking-reduction efforts may provide better outcomes among men. Smoking reduction efforts may pay more exercise benefits among African-Americans and Hispanics.
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Affiliation(s)
- J H Swan
- James H. Swan, Ph.D. Professor of Applied Gerontology, Department of Rehabilitation and Health Services, University of North Texas,, Denton, TX, USA,
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Amini R, Gilca R, Douville-Fradet M, Boulianne N, De Serres G. Evaluation of the New World Health Organization Case Definition of Severe Acute Respiratory Infection for Influenza Surveillance During the Peak Weeks of Two Influenza Seasons in Quebec, Canada. J Pediatric Infect Dis Soc 2017; 6:297-300. [PMID: 27496537 DOI: 10.1093/jpids/piw044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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] [Received: 12/18/2015] [Accepted: 07/11/2016] [Indexed: 12/21/2022]
Abstract
During the peak of the 2012-2013 and 2014-2015 influenza seasons in Quebec, Canada, the sensitivity of the new World Health Organization (WHO) case definition of severe acute respiratory infection (SARI) in <5-year-old children was 65% for polymerase chain reaction-confirmed influenza and 79% for other respiratory viruses (ORVs), whereas its specificity and positive predictive value were approximately 2- and 4-fold lower for influenza than ORVs (25% vs 40% and 18% vs 76%, respectively). The use of the WHO SARI definition for influenza surveillance in children should be interpreted with caution according to the specific surveillance goals.
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Affiliation(s)
- R Amini
- Institut National de Santé Publique du Québec
| | - R Gilca
- Institut National de Santé Publique du Québec.,Centre Hospitalier Universitaire de Quebec.,Laval University, Quebec, Quebec City, Canada
| | - M Douville-Fradet
- Institut National de Santé Publique du Québec.,Centre Hospitalier Universitaire de Quebec
| | - N Boulianne
- Institut National de Santé Publique du Québec.,Centre Hospitalier Universitaire de Quebec
| | - G De Serres
- Institut National de Santé Publique du Québec.,Centre Hospitalier Universitaire de Quebec.,Laval University, Quebec, Quebec City, Canada
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10
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Englund A, Molin D, Enblad G, Karlén J, Glimelius I, Ljungman G, Amini R. The role of tumour‐infiltrating eosinophils, mast cells and macrophages in Classical and Nodular Lymphocyte Predominant Hodgkin Lymphoma in children. Eur J Haematol 2016; 97:430-438. [DOI: 10.1111/ejh.12747] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/10/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Annika Englund
- Department of Women's and Children′s Health, Paediatric Oncology Uppsala University Uppsala Sweden
| | - Daniel Molin
- Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology Uppsala University Uppsala Sweden
| | - Gunilla Enblad
- Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology Uppsala University Uppsala Sweden
| | - Jonas Karlén
- Department of Women's and Children's Health Karolinska Institutet Stockholm Sweden
| | - Ingrid Glimelius
- Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology Uppsala University Uppsala Sweden
| | - Gustaf Ljungman
- Department of Women's and Children′s Health, Paediatric Oncology Uppsala University Uppsala Sweden
| | - Rose‐Marie Amini
- Department of Immunology, Genetics and Pathology Unit of Pathology Uppsala University Uppsala Sweden
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Amini R, Vakili H, Ramezanzadeh B. Studying the effects of poly (vinyl) alcohol on the morphology and anti-corrosion performance of phosphate coating applied on steel surface. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.06.024] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Adhikari S, Kartchner J, Amini R, Farrell I, Keim S. 69 Quality of Research and Level of Evidence in Point-of-Care Ultrasound Literature: Where Are We Now? Ann Emerg Med 2015. [DOI: 10.1016/j.annemergmed.2015.07.101] [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: 11/26/2022]
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14
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Amini R, Breshears E, Stolz L, Stea N, Hawbaker N, Thompson M, Sanders A, Adhikari S. 168 SNAPPY Teaching and Assessing Medical Students: Sonographic Assistance for Procedures in Preclinical Years. Ann Emerg Med 2015. [DOI: 10.1016/j.annemergmed.2015.07.200] [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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15
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Azizi Jalilian F, Yusoff K, Suhaimi S, Amini R, Sekawi Z, Jahanshiri F. Development of two salmonella-based oral vaccines against human respiratory syncytial virus. J BIOL REG HOMEOS AG 2015; 29:7-18. [PMID: 25864737] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Human respiratory syncytial virus is the most common cause of bronchiolitis and other respiratory infections in infants and the elderly worldwide. We have developed two new oral vaccines using Salmonella typhi TY21a to carry and express the immunogenic epitopes of RSV fusion (F) and attachment (G) glycoproteins on its surface, separately. To evaluate the efficacy of the designed vaccines, BALB/c mice were orally immunized and then infected with RSV. Immune response analyses showed that cellmediated, mucosal and humoral immunity in the vaccinated mice were significantly enhanced compared to the control group. Both vaccines generated a balanced Th1/Th2 immune response which is crucial for efficiency of vaccines against RSV. Furthermore, histopathological examination proved that these vaccines were safe as they did not cause any Th2-associated adverse effects in the lungs of RSV-infected mice. The findings of this research suggest that Salmonella-F and Salmonella-G vaccine candidates may have strong potential to prevent RSV infection.
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Affiliation(s)
- F Azizi Jalilian
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Malaysia
| | - K Yusoff
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Malaysia
| | - S Suhaimi
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Malaysia
| | - R Amini
- Department of Microbiology, Faculty of Sciences, Islamic Azad University, Hamedan, Iran
| | - Z Sekawi
- Department of Medical Microbiology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia
| | - F Jahanshiri
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Malaysia
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Amini R, Yazdanparast R, Ghaffari SH. Apigenin modulates the expression levels of pro-inflammatory mediators to reduce the human insulin amyloid-induced oxidant damages in SK-N-MC cells. Hum Exp Toxicol 2014; 34:642-53. [PMID: 25304968 DOI: 10.1177/0960327114554046] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Amyloid depositions of proteins play crucial roles in a wide variety of degenerative disorders called amyloidosis. Although the exact mechanisms involved in amyloid-mediated cytotoxicity remain unknown, increased formation of reactive oxygen species (ROS) and nitrogen species and overproduction of pro-inflammatory cytokines are believed to play key roles in the process. In that regard, we investigated the effect of apigenin, a common dietary flavonoid with high antioxidant and anti-inflammatory properties on potential factors involved in cytotoxicity of human insulin amyloids. Pretreatment of SK-N-MC neuroblastoma cells with apigenin increased cell viability and reduced the apoptosis induced by insulin fibrils. In addition, apigenin attenuated insulin fibril-induced ROS production and lipid peroxidation. Our result also demonstrated that pretreatment of the fibril-affected cells with apigenin caused an increase in catalase activity and the intracellular glutathione content along with reduction in nitric oxide production and nuclear factor κB, tumor necrosis factor α, and interleukin 6 gene expression based on real-time polymerase chain reaction evaluation. In accordance with these results, apigenin could be a promising candidate in the design of natural-based drugs for treatment or prevention of amyloid-related disorders.
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Affiliation(s)
- R Amini
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - R Yazdanparast
- Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
| | - S H Ghaffari
- Hematology, Oncology and Bone Marrow Transplantation Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Amini R, Adhikari S, Stolz L, Gaskin K, Baker N, Sanders A. 320 Evaluation of Hypotension: A Theme-Based Approach to Teaching Point-of-Care Ultrasound to Medical Students. Ann Emerg Med 2014. [DOI: 10.1016/j.annemergmed.2014.07.348] [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: 10/24/2022]
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18
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Amini R, Mousavizad S, Abdollahpour H, Ghaffari M, Alizadeh M, Okyay AK. Structural and microstructural phase evolution during mechano-synthesis of nanocrystalline/amorphous CuAlMn alloy powders. ADV POWDER TECHNOL 2013. [DOI: 10.1016/j.apt.2013.03.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [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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19
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Adhikari S, Fiorello A, Stolz L, Amini R, Gross A, O'Brien K, Mosier J, Blaivas M. Can Emergency Physicians Accurately Identify Complex Abnormalities on Point-of-Care Echocardiogram? Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.07.034] [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: 11/28/2022]
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20
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Amini R, Adhikari S, Stolz L, O'Brien K, Gross A, Panchal A, Drummond B, Reilly K, Chan L, Sanders A. Theme-Based Ultrasound Education: A Novel Approach to Teaching Point-of-Care Ultrasound to Medical Students. Ann Emerg Med 2013. [DOI: 10.1016/j.annemergmed.2013.07.206] [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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21
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Salahinejad E, Hadianfard M, Ghaffari M, Amini R, Bagheri Mashhadi S, Okyay A. Microstructural characterization of medical-grade stainless steel powders prepared by mechanical alloying and subsequent annealing. ADV POWDER TECHNOL 2013. [DOI: 10.1016/j.apt.2012.11.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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22
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Safadel N, Dahim P, Anjarani S, Rahnamaye Farzami M, Samiee SM, Amini R, Farsi S, Mahdavi S, Khodaverdian K, Rashed Marandi F. Challenges of implementing Iranian national laboratory standards. Iran J Public Health 2013; 42:125-8. [PMID: 23865029 PMCID: PMC3712584] [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] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/18/2012] [Accepted: 10/21/2012] [Indexed: 10/27/2022]
Abstract
After four years of publishing the Iranian National Laboratory Standard and following a strategic plan to implement its requirements, it was decided to review the taken actions, evaluating the achievements and the failures, as well as analyzing the gaps and planning the interventional activities to resolve the problems. A thorough evaluation revealed that the progress of implementation process varies considerably in different provinces, as well as in laboratories in different public and private sectors. Diversity and heterogeneousity of laboratories throughout the country is one of unresolvable problems. Although we encounter shortage of resources in the country, improper allocation or distribution of resources and budgets make the problems more complicated. Inadequacy of academic training in laboratory sciences has resulted in necessity of holding comprehensive post-graduate training courses. Revising academic curriculum of laboratory sciences could be mostly helpful, moreover there should be organized, training courses with pre-determined practical topics. providing specific technical guidelines, to clarify the required technical details could temporarily fill the training gaps of laboratory staff. Inadequate number of competent auditors was one of the difficulties in universities. Another important challenge returns to laboratory equipment, developing the national controlling system to manage the laboratory equipment in terms of quality and accessibility has been planned in RHL. At last cultural problems and resistance to change are main obstacles that have reduced the pace of standardization, it needs to rationalize the necessity of establishing laboratory standards for all stakeholders.
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Etemadi MR, Jalilian FA, Abd Wahab N, Jahanshiri F, Amini R, Othman N, Sekawi Z. First detected human bocavirus in a Malaysian child with pneumonia and pre-existing asthma: a case report. Med J Malaysia 2012; 67:433-434. [PMID: 23082460] [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: 06/01/2023]
Abstract
Human bocavirus (HBoV) is a newly discovered parvovirus associated with respiratory disease in children. There are many reports worldwide on the endemicity of this virus. Since it is relatively new, detection in clinical laboratories is not routinely performed. We describe the first detection of HBoV in Malaysia in a 13-month-old boy with pneumonia and underlying asthma. The infective agent was confirmed by molecular methods.
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Affiliation(s)
- M R Etemadi
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Sciences, University Putra Malaysia, Selangor
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24
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Tabeshnia M, Rashvandavei M, Amini R, Pashaee F. Electrocatalytic oxidation of some amino acids on a cobalt hydroxide nanoparticles modified glassy carbon electrode. J Electroanal Chem (Lausanne) 2010. [DOI: 10.1016/j.jelechem.2010.06.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [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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25
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Niméus-Malmström E, Koliadi A, Ahlin C, Holmqvist M, Holmberg L, Amini R, Jirström K, Wärnberg F, Blomqvist C, Fernö M, Fjällskog M. Cyclin B1 Is an Independent Prognostic Proliferation Marker with a High Reproducibility in a Population-Based Lymph Node Negative Breast Cancer Cohort. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-6051] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Purpose: A large proportion of women with lymph node negative breast cancer treated with chemotherapy do not benefit from such treatment. Proliferation markers can recognize patients at high risk for recurrence. However, no proliferation marker is generally accepted for clinical use. We investigated the independent prognostic importance of cyclin B1 in node negative breast cancer and included a study of the reproducibility.Study Design: In a population-based, case-control study, 190 women who died from breast cancer were defined as cases and 190 women alive at the time for the corresponding case's death as controls. Inclusion criteria were tumor size ≤ 50 mm, no lymph node metastases, and no adjuvant chemotherapy. Tumor tissue was immunostained for cyclin B1. Two investigators evaluated the staining independently by counting approximately 100, 200, 500, and 1000 cells.Results: Cyclin B1 was statistically significantly associated to breast cancer death, in both uni- and multivariate analyses (adjusted for tumor size, age, and endocrine therapy), with odds ratios 2-3 for both investigators. The reproducibility between the two investigators was good to very good, regardless of the number of counted cells (kappa values between 0.74 and 0.82).Conclusions: Cyclin B1 is a prognostic factor for breast cancer death in a population-based and node negative patient cohort and can identify high-risk node negative patients with a good to very good reproducibility.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 6051.
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Affiliation(s)
| | - A. Koliadi
- 2Institution of Medical Sciences, Uppsala University, Sweden
| | - C. Ahlin
- 2Institution of Medical Sciences, Uppsala University, Sweden
| | | | - L. Holmberg
- 4King's College London, Medical School, United Kingdom
| | - R. Amini
- 5Institution of Genetics and Pathology, Sweden
| | | | | | - C. Blomqvist
- 2Institution of Medical Sciences, Uppsala University, Sweden
| | - M. Fernö
- 1Institution of Clinical Sciences, Lund University, Sweden
| | - M. Fjällskog
- 2Institution of Medical Sciences, Uppsala University, Sweden
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26
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Bradshaw S, Ouellet D, Amini R, DeKoninck J. 021 THREAT SIMULATION IN DREAMS AND THE SEVERITY OF WAKING THREATENING EXPERIENCE. Sleep Med 2009. [DOI: 10.1016/s1389-9457(09)70023-1] [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: 11/30/2022]
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27
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Borzou SR, Gholyaf M, Zandiha M, Amini R, Goodarzi MT, Torkaman B. The effect of increasing blood flow rate on dialysis adequacy in hemodialysis patients. Saudi J Kidney Dis Transpl 2009; 20:639-642. [PMID: 19587507] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023] Open
Abstract
Inadequacy of dialysis is one of the determinants of morbidity and mortality in patients undergoing dialysis. The aim of this study was to assess the effect of increasing blood flow rate during hemodialysis (HD) on the adequacy of dialysis. In this study, 42 patients on maintenance HD were assessed. Body weight and blood urea nitrogen (BUN) levels before and after HD sessions were recorded on all the study patients. Volume of ultrafiltration, the duration of dialysis, percentage of filter clearance and flow rate of the dialysate were collected and documented in a checklist. Both Kt/V and urea reduction ratio (URR) were determined at two different blood pump speeds, i.e. 200 and 250 mL/min. During HD, hemodynamic status and vital signs of patients were monitored and controlled. After collecting the necessary data, efficiency of dialysis was calculated using the standard formula. Descriptive and analytical statistics was carried out to analyze the data. Using blood flow rate of 200 mL/min, 16.7% of patients had Kt/V higher than 1.3 and URR higher than 65. On the other hand, with flow rate of 250 mL/min, 26.2% of patients had Kt/V higher than 1.3 and 35.7% of subjects had URR higher than 65. Paired t-test with 95% confidence showed a significant difference in dialysis efficiency between two groups. Our data further confirm that increasing the blood flow rate by 25% is effective in increasing dialysis adequacy in HD patients.
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Affiliation(s)
- S R Borzou
- Department of Nursing, Hamadan University of Medical Sciences, Hamadan, Iran.
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28
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Amini R, Barnes TA, Savran A, Narusawa U. Respiratory System Model for Quasistatic Pulmonary Pressure-Volume (P-V) Curve: Generalized P-V Curve Analyses. J Biomech Eng 2008; 130:044501. [DOI: 10.1115/1.2913345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A normalized P-V curve is proposed for quantitative comparisons of quasistatic P-V curves from different sources, including data from different investigators, airway pressure-volume curves versus transpulmonary pressure-volume curves, normal versus injured respiratory system, and animal tests versus clinical data. Similarities and differences among five different data groups we analyzed are shown to be quantified through the nondimensional pressure range of an individual data set, combined with the magnitudes of two nondimensional parameters of the inflation limb, derived from a respiratory system model previously reported.
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Affiliation(s)
- R. Amini
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115
| | - T. A. Barnes
- Department of Cardiopulmonary and Exercise Sciences, Northeastern University, Boston, MA 02115
| | - A. Savran
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115
| | - U. Narusawa
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115
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29
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Amini R, Narusawa U. Respiratory System Model for Quasistatic Pulmonary Pressure-Volume (P-V) Curve: Inflation-Deflation Loop Analyses. J Biomech Eng 2008; 130:031020. [DOI: 10.1115/1.2913343] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A respiratory system model (RSM) is developed for the deflation process of a quasistatic pressure-volume (P-V) curve, following the model for the inflation process reported earlier. In the RSM of both the inflation and the deflation limb, a respiratory system consists of a large population of basic alveolar elements, each consisting of a piston-spring-cylinder subsystem. A normal distribution of the basic elements is derived from Boltzmann statistical model with the alveolar closing (opening) pressure as the distribution parameter for the deflation (inflation) process. An error minimization by the method of least squares applied to existing P-V loop data from two different data sources confirms that a simultaneous inflation-deflation analysis is required for an accurate determination of RSM parameters. Commonly used terms such as lower inflection point, upper inflection point, and compliance are examined based on the P-V equations, on the distribution function, as well as on the geometric and physical properties of the basic alveolar element.
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Affiliation(s)
- R. Amini
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115
| | - U. Narusawa
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA 02115
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Abstract
A mechanistic model of the respiratory system is proposed to understand differences in quasistatic pressure-volume (p-V) curves of the inflation process in terms of the alveolar recruitment and the elastic distension of the wall tissues. In the model, a total respiratory system consists of a large number of elements, each of which is a subsystem of a cylindrical chamber fitted with a piston attached to a spring. The alveolar recruitment is simulated by allowing a distribution of the critical pressure at which an element opens; while the wall distension is represented by the piston displacement. Relations are derived between parameters in the error-function p-V model equation and properties of the mechanistic model. The parameters of the model-based p-V equation are determined for clinical data sets of patients with acute respiratory distress syndrome.
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Affiliation(s)
- R Amini
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, Massachusetts 02115, USA
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31
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Ghasemi J, Amini R, Niazi A. KINETIC SIMULTANEOUS DETERMINATION OF Fe(II) AND Fe(III) USING PARTIAL LEAST SQUARES (PLS) AND PRINCIPAL COMPONENT REGRESSION (PCR) CALIBRATION METHODS. ANAL LETT 2002. [DOI: 10.1081/al-120002685] [Citation(s) in RCA: 22] [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: 11/03/2022]
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32
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Ghasemi J, Amini R, Afkhami A. Kinetic spectrophotometric determination of thiocyanate based on its inhibitory effect on the oxidation of methyl red by bromate. ANAL SCI 2001; 17:435-7. [PMID: 11990623 DOI: 10.2116/analsci.17.435] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A kinetic spectrophotometric method for measuring thiocyanate is described. The proposed method is based on the inhibitory effect of thiocyanate on the oxidation of Methyl Red by bromate in the presence of nitrite, which was monitored at 520 nm. The variables affecting the rate of the reaction were investigated and the optimum conditions were established. Thiocyanate can be measured in the range of 0.05-1.1 microg ml(-1) with a detection limit of 0.025 microg ml(-1). This method has been used to determine trace thiocyanate in urine and tap water samples.
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Affiliation(s)
- J Ghasemi
- Department of Chemistry, Razi University, Kermanshah, Iran.
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Zhao Y, Sheng HZ, Amini R, Grinberg A, Lee E, Huang S, Taira M, Westphal H. Control of hippocampal morphogenesis and neuronal differentiation by the LIM homeobox gene Lhx5. Science 1999; 284:1155-8. [PMID: 10325223 DOI: 10.1126/science.284.5417.1155] [Citation(s) in RCA: 140] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The mammalian hippocampus contains the neural circuitry that is crucial for cognitive functions such as learning and memory. The development of such circuitry is dependent on the generation and correct placement of the appropriate number and types of neurons. Mice lacking function of the LIM homeobox gene Lhx5 showed a defect in hippocampus development. Hippocampal neural precursor cells were specified and proliferated, but many of them failed to either exit the cell cycle or to differentiate and migrate properly. Lhx5 is therefore essential for the regulation of precursor cell proliferation and the control of neuronal differentiation and migration during hippocampal development.
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Affiliation(s)
- Y Zhao
- Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, Bethesda, MD 20892, USA
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Abstract
The distinction between syncope and epileptic seizures is a common clinical diagnostic problem. Elevated serum prolactin (PRL) concentrations are used to help differentiate epileptic from nonepileptic attacks such as pseudoseizures. Reports of PRL concentrations following syncope have been variable. To determine whether PRL rises after syncope, we measured serum PRL concentrations during a 45-minute passive 60-degree head-up tilt in 21 patients with a history of near-fainting or syncope. Head-up tilt triggered hypotension (mean arterial pressure 51 mm Hg, 95% CI = 45-57) with syncope in 11 patients. PRL concentrations were elevated ( > 19 ng/mL) and reached a maximum within the first 30 minutes after tilt-induced syncope in nine patients (PRL supine: 11 ng/mL, 95% CI = 7-15, vs. PRL after syncope: 52 ng/mL, 95% CI = 36-67; a greater than fourfold rise), while they remained unchanged in 10 patients who had a normal response to head-up tilt (PRL supine: 6 ng/mL, 95% CI = 5-8, vs. maximum PRL while upright: 8 ng/mL, 95% CI = 6-10). The findings indicate that elevated PRL concentrations are present after hypotensive syncope and are of little use in differentiating such syncope from epileptic seizures.
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Affiliation(s)
- E Oribe
- Department of Medicine, Catholic Medical Center of Brooklyn and Queens, Jamaica, NY, USA
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35
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Lawrence NP, Richman A, Amini R, Altman S. Heterologous enzyme function in Escherichia coli and the selection of genes encoding the catalytic RNA subunit of RNase P. Proc Natl Acad Sci U S A 1987; 84:6825-9. [PMID: 2443911 PMCID: PMC299177 DOI: 10.1073/pnas.84.19.6825] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The gene for the catalytic RNA subunit of RNase P has been isolated from several Enterobacteriaceae by complementation of an Escherichia coli strain that is temperature-sensitive for RNase P activity. The selection procedure relies on the ability of the heterologous gene products to function enzymatically in E. coli. This procedure obviates the need for positive results in DNA blot hybridization experiments or for the purification of holoenzyme to identify the RNA component of RNase P and its corresponding gene from organisms other than E. coli. Comparisons of the variations in sequences provide the basis for a refined two-dimensional model of the secondary structure of M1 RNA.
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Affiliation(s)
- N P Lawrence
- Department of Biology, Yale University, New Haven, CT 06520
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