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Karlsson T, Hadizadeh F, Rask-Andersen M, Johansson Å, Ek WE. Body Mass Index and the Risk of Rheumatic Disease: Linear and Nonlinear Mendelian Randomization Analyses. Arthritis Rheumatol 2023; 75:2027-2035. [PMID: 37219954 DOI: 10.1002/art.42613] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 04/07/2023] [Accepted: 05/16/2023] [Indexed: 05/24/2023]
Abstract
OBJECTIVE Although the association between obesity and risk of rheumatic disease is well established, the precise causal relation has not been conclusively proven. Here, we estimate the causal effect of body mass index (BMI) on the risk of developing 5 different rheumatic diseases. METHODS Linear and nonlinear mendelian randomization (MR) were used to estimate the effect of BMI on risk of rheumatic disease, and sex-specific effects were identified. Analyses were performed in 361,952 participants from the UK Biobank cohort for 5 rheumatic diseases: rheumatoid arthritis (n = 8,381 cases), osteoarthritis (n = 87,430), psoriatic arthropathy (n = 933), gout (n = 13,638), and inflammatory spondylitis (n = 4,328). RESULTS Using linear MR, we found that 1 SD increase in BMI increases the incidence rate for rheumatoid arthritis (incidence rate ratio [IRR] 1.52 [95% confidence interval (95% CI) 1.36-1.69]), osteoarthritis (IRR 1.49 [95% CI 1.43-1.55]), psoriatic arthropathy (IRR 1.80 [95% CI 1.31-2.48]), gout (IRR 1.73 [95% CI 1.56-1.92]), and inflammatory spondylitis (IRR 1.34 [95% CI 1.14-1.57]) in all individuals. BMI was found to be a stronger risk factor in women compared to men for psoriatic arthropathy (P for sex interaction = 3.3 × 10-4 ) and gout (P for sex interaction = 4.3 × 10-3 ), and the effect on osteoarthritis was stronger in premenopausal compared to postmenopausal women (P = 1.8 × 10-3 ). Nonlinear effects of BMI were identified for osteoarthritis and gout in men, and for gout in women. The nonlinearity for gout was also more extreme in men compared to women (P = 0.03). CONCLUSION Higher BMI causes an increased risk for rheumatic disease, an effect that is more pronounced in women for both gout and psoriatic arthropathy. The novel sex- and BMI-specific causal effects identified here provide further insight into rheumatic disease etiology and mark an important step toward personalized medicine.
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Affiliation(s)
- Torgny Karlsson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Fatemeh Hadizadeh
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Mathias Rask-Andersen
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Åsa Johansson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Weronica E Ek
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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Hadizadeh F, Johansson T, Johansson Å, Karlsson T, Ek WE. Effects of oral contraceptives and menopausal hormone therapy on the risk of rheumatoid arthritis: a prospective cohort study. Rheumatology (Oxford) 2023:kead513. [PMID: 37773999 DOI: 10.1093/rheumatology/kead513] [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: 05/23/2023] [Revised: 08/26/2023] [Accepted: 09/11/2023] [Indexed: 10/01/2023] Open
Abstract
OBJECTIVES Oral contraceptives (OC) and menopausal hormone therapy (MHT) contain exogenous sex hormones and are used by millions of women around the world. However, their effect on development of rheumatoid arthritis (RA) is still debated and the current literature suggests that they may exert opposite effects on the risk of RA. The present study aimed to estimate the effects of exogenous hormones on development of RA, both during the reproductive lifespan and later in life. METHODS The association between OC and RA, as well as between MHT and late-onset RA (LORA), was investigated using time-dependent Cox regression modelling in white British women from the UK Biobank (N = 236 602 and N = 102 466, respectively) and replicated in women from all ethnic groups. RESULTS OC use was associated with a decreased risk of RA in ever-users (hazard ratio [HR]=0.89; 95% CI = 0.82-0.96), as well as in current (HR = 0.81; 0.73-0.91) and former users (HR = 0.92; 0.84 -1.00), compared with never-users. In contrast, MHT use was associated with an increased risk of LORA in ever-users (HR = 1.16; 1.06-1.26) as well as in former users (HR = 1.13; 1.03-1.24) compared with never-users. CONCLUSION OC use appears to protect against RA, while MHT may increase the risk of LORA. This study provides new insights into the possible inverse effect of exposure to different exogenous sex hormones on the risk of RA.
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Affiliation(s)
- Fatemeh Hadizadeh
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Box 815, Uppsala, 75108, Sweden
| | - Therese Johansson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Box 815, Uppsala, 75108, Sweden
| | - Åsa Johansson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Box 815, Uppsala, 75108, Sweden
| | - Torgny Karlsson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Box 815, Uppsala, 75108, Sweden
| | - Weronica E Ek
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Box 815, Uppsala, 75108, Sweden
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Lo Faro V, Johansson T, Höglund J, Hadizadeh F, Johansson Å. Polygenic risk scores and risk stratification in deep vein thrombosis. Thromb Res 2023; 228:151-162. [PMID: 37331118 DOI: 10.1016/j.thromres.2023.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 05/18/2023] [Accepted: 06/09/2023] [Indexed: 06/20/2023]
Abstract
INTRODUCTION Deep vein thrombosis (DVT) is a complex disease, where 60 % of risk is due to genetic factors, such as the Factor V Leiden (FVL) variant. DVT is either asymptomatic or manifests with unspecific symptoms and, if left untreated, DVT leads to severe complications. The impact is dramatic and currently, there is still a research gap in DVT prevention. We characterized the genetic contribution and stratified individuals based on genetic makeup to evaluate if it favorably impacts risk prediction. METHODS In the UK Biobank (UKB), we performed gene-based association tests using exome sequencing data, as well as a genome-wide association study. We also constructed polygenic risk scores (PRS) in a subset of the cohort (Number of cases = 8231; Number of controls = 276,360) and calculated the impact on the prediction capacity of the PRS in a non-overlapping part of the cohort (Number of cases = 4342; Number of controls = 142,822). We generated additional PRSs that excluded the known causative variants. RESULTS We discovered and replicated a novel common variant (rs11604583) near the region where are located the TRIM51 and LRRC55 genes and identified a novel rare variant (rs187725533) located near the CREB3L1 gene, associated with 2.5-fold higher risk of DVT. In one of the PRS models constructed, the top decile of risk is associated with 3.4-fold increased risk, an effect that is 2.3-fold when excluding FVL carriers. In the top PRS decile, the cumulative risk of DVT at the age of 80 years is 10 % for FVL carriers, contraposed to 5 % for non-carriers. The population attributable fractions of having a high polygenic risk on the rate of DVT was estimated to be around 20 % in our cohort. CONCLUSION Individuals with a high polygenic risk of DVT, and not only carriers of well-studied variants such as FVL, may benefit from prevention strategies.
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Affiliation(s)
- Valeria Lo Faro
- Department of Immunology, Genetics and Pathology, Genomics and Neurobiology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden.
| | - Therese Johansson
- Department of Immunology, Genetics and Pathology, Genomics and Neurobiology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden; Centre for Women's Mental Health during the Reproductive Lifespan - Womher, Uppsala University, Uppsala, Sweden
| | - Julia Höglund
- Department of Immunology, Genetics and Pathology, Genomics and Neurobiology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Fatemeh Hadizadeh
- Department of Immunology, Genetics and Pathology, Genomics and Neurobiology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Åsa Johansson
- Department of Immunology, Genetics and Pathology, Genomics and Neurobiology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
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Johansson Å, Schmitz D, Höglund J, Hadizadeh F, Karlsson T, Ek WE. Investigating the Effect of Estradiol Levels on the Risk of Breast, Endometrial, and Ovarian Cancer. J Endocr Soc 2022; 6:bvac100. [PMID: 35822202 PMCID: PMC9265484 DOI: 10.1210/jendso/bvac100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Indexed: 11/19/2022] Open
Abstract
Background High levels of estrogen are associated with increased risk of breast and endometrial cancer and have been suggested to also play a role in the development of ovarian cancer. Cancerogenic effects of estradiol, the most prominent form of estrogen, have been highlighted as a side effect of estrogen-only menopausal hormone therapy. However, whether high levels of endogenous estrogens, produced within the body, promote cancer development, has not been fully established. Objective We aimed to examine causal effects of estradiol on breast, endometrial, and ovarian cancer. Methods Here we performed a two-sample Mendelian randomization (MR) to estimate the effect of endogenous estradiol on the risk of developing breast, endometrial, and ovarian cancer, using the UK Biobank as well as 3 independent cancer cohorts. Results Using 3 independent instrumental variables, we showed that higher estradiol levels significantly increase the risk for ovarian cancer (OR = 3.18 [95% CI, 1.47-6.87], P = 0.003). We also identified a nominally significant effect for ER-positive breast cancer (OR = 2.16 [95% CI, 1.09-4.26], P = 0.027). However, we could not establish a clear link to the risk of endometrial cancer (OR = 1.93 [95% CI, 0.77-4.80], P = 0.160). Conclusion Our results suggest that high estradiol levels promote the development of ovarian and ER-positive breast cancer.
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Affiliation(s)
- Åsa Johansson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 75108 Uppsala, Sweden
| | - Daniel Schmitz
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 75108 Uppsala, Sweden
| | - Julia Höglund
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 75108 Uppsala, Sweden
| | - Fatemeh Hadizadeh
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 75108 Uppsala, Sweden
| | - Torgny Karlsson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 75108 Uppsala, Sweden
| | - Weronica E Ek
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, 75108 Uppsala, Sweden
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Höglund J, Hadizadeh F, Ek WE, Karlsson T, Johansson Å. Gene-Based Variant Analysis of Whole-Exome Sequencing in Relation to Eosinophil Count. Front Immunol 2022; 13:862255. [PMID: 35935937 PMCID: PMC9355086 DOI: 10.3389/fimmu.2022.862255] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Accepted: 06/20/2022] [Indexed: 11/26/2022] Open
Abstract
Eosinophils play important roles in the release of cytokine mediators in response to inflammation. Many associations between common genetic variants and eosinophils have already been reported, using single nucleotide polymorphism (SNP) array data. Here, we have analyzed 200,000 whole-exome sequences (WES) from the UK Biobank cohort and performed gene-based analyses of eosinophil count. We defined five different variant weighting schemes to incorporate information on both deleteriousness and frequency. A total of 220 genes in 55 distinct (>10 Mb apart) genomic regions were found to be associated with eosinophil count, of which seven genes (ALOX15, CSF2RB, IL17RA, IL33, JAK2, S1PR4, and SH2B3) are driven by rare variants, independent of common variants identified in genome-wide association studies. Two additional genes, NPAT and RMI1, have not been associated with eosinophil count before and are considered novel eosinophil loci. These results increase our knowledge about the effect of rare variants on eosinophil count, which can be of great value for further identification of therapeutic targets.
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Abstract
INTRODUCTION Isfahan functional disorders (ISFUN) cohort study aims to describe the interplay of genetic and environmental factors in shaping the characteristics of functional somatic syndromes (FSS). This study is primarily intended to investigate the epidemiology, risk factors, course and prognosis of FSSs in a sample of adult Iranian population. The other aim is to develop a new delimitation of FSSs based on an integrated multidisciplinary approach comprising of phenotypic and multiomics data. METHODS AND ANALYSIS ISFUN is a population-based prospective cohort study designed to follow a population of randomly selected seemingly healthy adults (18-65 years) through annual visits during a 4-year observation period. Structured questionnaires are used for data collection and clinical assessment of the participants. Questionnaire-based diagnosis of FSSs are validated in a medical interview. Human DNA genotyping, microbial amplicon sequencing and urine analysis is under progress for genomics, microbiota and metabolomics profiling, respectively. Enrolment began in September 2017, and study completion is expected in 2022. A total number of 1943 participants were initially recruited. ETHICS AND DISSEMINATION Ethical approval for data collection was granted by the National Research Ethics Committee of the Iranian Ministry of Health and Medical Education and the Research Ethics Committee of Isfahan University of Medical Sciences (IR.MUI.REC.1395.1.149). Following the description of the study procedure, we obtained written informed consent from all study participants. Study findings will be disseminated through peer-reviewed publications and presentations at scientific meetings.
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Affiliation(s)
- Peyman Adibi
- Isfahan Gastroenterology and Hepatology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Internal Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Alireza Ani
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Bioinformatics, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ahmad Vaez
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Bioinformatics, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Hadizadeh
- Department of Bioinformatics, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Harold Snieder
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Hamidreza Roohafza
- Cardiac Rehabilitation Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
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Abstract
The coronavirus disease 2019 (COVID-19) pandemic was declared a public health emergency of international concern by the World Health Organization. COVID-19 has high transmissibility and could result in acute lung injury in a fraction of patients. By counterbalancing the activity of the renin-angiotensin system, angiotensin-converting enzyme 2, which is the fusion receptor of the virus, plays a protective role against the development of complications of this viral infection. Vitamin D can induce the expression of angiotensin-converting enzyme 2 and regulate the immune system through different mechanisms. Epidemiologic studies of the relationship between vitamin D and various respiratory infections were reviewed and, here, the postulated mechanisms and clinical data supporting the protective role of vitamin D against COVID-19-mediated complications are discussed.
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Affiliation(s)
- Fatemeh Hadizadeh
- Department of Bioinformatics, School of Advanced Technologies in Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Bonfiglio F, Henström M, Nag A, Hadizadeh F, Zheng T, Cenit MC, Tigchelaar E, Williams F, Reznichenko A, Ek WE, Rivera NV, Homuth G, Aghdassi AA, Kacprowski T, Männikkö M, Karhunen V, Bujanda L, Rafter J, Wijmenga C, Ronkainen J, Hysi P, Zhernakova A, D'Amato M. A GWAS meta-analysis from 5 population-based cohorts implicates ion channel genes in the pathogenesis of irritable bowel syndrome. Neurogastroenterol Motil 2018; 30:e13358. [PMID: 29673008 DOI: 10.1111/nmo.13358] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 03/23/2018] [Indexed: 12/13/2022]
Abstract
BACKGROUND Irritable bowel syndrome (IBS) shows genetic predisposition, however, large-scale, powered gene mapping studies are lacking. We sought to exploit existing genetic (genotype) and epidemiological (questionnaire) data from a series of population-based cohorts for IBS genome-wide association studies (GWAS) and their meta-analysis. METHODS Based on questionnaire data compatible with Rome III Criteria, we identified a total of 1335 IBS cases and 9768 asymptomatic individuals from 5 independent European genotyped cohorts. Individual GWAS were carried out with sex-adjusted logistic regression under an additive model, followed by meta-analysis using the inverse variance method. Functional annotation of significant results was obtained via a computational pipeline exploiting ontology and interaction networks, and tissue-specific and gene set enrichment analyses. KEY RESULTS Suggestive GWAS signals (P ≤ 5.0 × 10-6 ) were detected for 7 genomic regions, harboring 64 gene candidates to affect IBS risk via functional or expression changes. Functional annotation of this gene set convincingly (best FDR-corrected P = 3.1 × 10-10 ) highlighted regulation of ion channel activity as the most plausible pathway affecting IBS risk. CONCLUSION & INFERENCES Our results confirm the feasibility of population-based studies for gene-discovery efforts in IBS, identify risk genes and loci to be prioritized in independent follow-ups, and pinpoint ion channels as important players and potential therapeutic targets warranting further investigation.
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Affiliation(s)
- F Bonfiglio
- Department of Gastrointestinal and Liver Diseases, Biodonostia Health Research Institute, Spain.,Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - M Henström
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - A Nag
- Department of Twin Research & Genetic Epidemiology, King's College London, London, England
| | - F Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - T Zheng
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - M C Cenit
- Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands
| | - E Tigchelaar
- Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands
| | - F Williams
- Department of Twin Research & Genetic Epidemiology, King's College London, London, England
| | - A Reznichenko
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - W E Ek
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.,Department of Immunology, Genetics and Pathology, Science for Life Laboratory Uppsala, Uppsala University, Uppsala, Sweden
| | - N V Rivera
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - G Homuth
- Department of Functional Genomics, Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - A A Aghdassi
- Department of Medicine A, University Medicine Greifswald, Greifswald, Germany
| | - T Kacprowski
- Department of Functional Genomics, Interfaculty Institute of Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - M Männikkö
- Center for Life Course Health Research, University of Oulu, Oulu, Finland
| | - V Karhunen
- Center for Life Course Health Research, University of Oulu, Oulu, Finland.,Oulu University Hospital, Oulu, Finland.,Department of Epidemiology and Biostatistics, Imperial College London, London, UK
| | - L Bujanda
- Department of Gastrointestinal and Liver Diseases, Biodonostia Health Research Institute, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Universidad del País Vasco (UPV/EHU), San Sebastián, Spain
| | - J Rafter
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - C Wijmenga
- Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands
| | - J Ronkainen
- Center for Life Course Health Research, University of Oulu, Oulu, Finland.,Primary Health Care Center, Tornio, Finland
| | - P Hysi
- Department of Ophthalmology, King's College London, St Thomas' Hospital Campus, London, UK
| | - A Zhernakova
- Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands
| | - M D'Amato
- Department of Gastrointestinal and Liver Diseases, Biodonostia Health Research Institute, Spain.,Unit of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden.,BioCruces Health Research Institute, Bilbao, Spain.,IKERBASQUE, Basque Science Foundation, Bilbao, Spain
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Bonfiglio F, Zheng T, Garcia-Etxebarria K, Hadizadeh F, Bujanda L, Bresso F, Agreus L, Andreasson A, Dlugosz A, Lindberg G, Schmidt PT, Karling P, Ohlsson B, Simren M, Walter S, Nardone G, Cuomo R, Usai-Satta P, Galeazzi F, Neri M, Portincasa P, Bellini M, Barbara G, Latiano A, Hübenthal M, Thijs V, Netea MG, Jonkers D, Chang L, Mayer EA, Wouters MM, Boeckxstaens G, Camilleri M, Franke A, Zhernakova A, D'Amato M. Female-Specific Association Between Variants on Chromosome 9 and Self-Reported Diagnosis of Irritable Bowel Syndrome. Gastroenterology 2018; 155:168-179. [PMID: 29626450 PMCID: PMC6035117 DOI: 10.1053/j.gastro.2018.03.064] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 03/28/2018] [Accepted: 03/31/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Genetic factors are believed to affect risk for irritable bowel syndrome (IBS), but there have been no sufficiently powered and adequately sized studies. To identify DNA variants associated with IBS risk, we performed a genome-wide association study (GWAS) of the large UK Biobank population-based cohort, which includes genotype and health data from 500,000 participants. METHODS We studied 7,287,191 high-quality single nucleotide polymorphisms in individuals who self-reported a doctor's diagnosis of IBS (cases; n = 9576) compared to the remainder of the cohort (controls; n = 336,499) (mean age of study subjects, 40-69 years). Genome-wide significant findings were further investigated in 2045 patients with IBS from tertiary centers and 7955 population controls from Europe and the United States, and a small general population sample from Sweden (n = 249). Functional annotation of GWAS results was carried out by integrating data from multiple biorepositories to obtain biological insights from the observed associations. RESULTS We identified a genome-wide significant association on chromosome 9q31.2 (single nucleotide polymorphism rs10512344; P = 3.57 × 10-8) in a region previously linked to age at menarche, and 13 additional loci of suggestive significance (P < 5.0×10-6). Sex-stratified analyses revealed that the variants at 9q31.2 affect risk of IBS in women only (P = 4.29 × 10-10 in UK Biobank) and also associate with constipation-predominant IBS in women (P = .015 in the tertiary cohort) and harder stools in women (P = .0012 in the population-based sample). Functional annotation of the 9q31.2 locus identified 8 candidate genes, including the elongator complex protein 1 gene (ELP1 or IKBKAP), which is mutated in patients with familial dysautonomia. CONCLUSIONS In a sufficiently powered GWAS of IBS, we associated variants at the locus 9q31.2 with risk of IBS in women. This observation may provide additional rationale for investigating the role of sex hormones and autonomic dysfunction in IBS.
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Affiliation(s)
- Ferdinando Bonfiglio
- Unit of Gastrointestinal Genetics, Department of Gastrointestinal and Liver Diseases, Biodonostia Health Research Institute, San Sebastián, Spain; Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Tenghao Zheng
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden; Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Koldo Garcia-Etxebarria
- Unit of Gastrointestinal Genetics, Department of Gastrointestinal and Liver Diseases, Biodonostia Health Research Institute, San Sebastián, Spain; Unit of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Fatemeh Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Luis Bujanda
- Unit of Gastrointestinal Genetics, Department of Gastrointestinal and Liver Diseases, Biodonostia Health Research Institute, San Sebastián, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Universidad del País Vasco, San Sebastián, Spain
| | - Francesca Bresso
- Gastoenterology Unit, Tema inflammation and infection, Karolinska University Hospital, Stockholm, Sweden
| | - Lars Agreus
- Division for Family Medicine and Primary Care, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Anna Andreasson
- Division for Family Medicine and Primary Care, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Stress Research Institute, Stockholm University, Stockholm, Sweden
| | - Aldona Dlugosz
- Department of Medicine Solna, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - Greger Lindberg
- Department of Medicine Solna, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - Peter T Schmidt
- Department of Medicine Solna, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - Pontus Karling
- Division of Medicine, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Bodil Ohlsson
- Lund University, Skåne University Hospital, Department of Internal Medicine, Lund, Sweden
| | - Magnus Simren
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Susanna Walter
- Division of Neuro and Inflammation Science, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Gerardo Nardone
- Gastroenterology Unit, Department of Clinical Medicine and Surgery, University Federico II, Naples, Italy
| | - Rosario Cuomo
- Digestive Motility Diseases, Department of Clinical Medicine and Surgery, Federico II University Hospital, Naples, Italy
| | - Paolo Usai-Satta
- SC Gastroenterologia, Azienda Ospedaliera G. Brotzu, Cagliari, Italy
| | | | - Matteo Neri
- Department of Medicine and Aging Sciences and Center for Excellence on Aging, G. D'Annunzio University and Foundation, Chieti, Italy
| | - Piero Portincasa
- Department of Biomedical Sciences and Human Oncology, Clinica Medica A. Murri, University of Bari Medical School, Bari, Italy
| | - Massimo Bellini
- Gastroenterology Unit, Department of Gastroenterology, University of Pisa, Pisa, Italy
| | - Giovanni Barbara
- Department of Medical and Surgical Sciences, University of Bologna, St. Orsola, Malpighi Hospital, Bologna, Italy
| | - Anna Latiano
- Division of Gastroenterology, Istituto di Ricovero e Cura a Carattere Scientifico, Casa Sollievo della Sofferenza Hospital, San Giovanni Rotondo, Italy
| | - Matthias Hübenthal
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Vincent Thijs
- Florey Institute of Neuroscience and Mental Health, Heidelberg, Victoria, Australia
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Center of Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands; Department for Genomics and Immunoregulation, Life and Medical Sciences Institute, University of Bonn, Bonn, Germany
| | - Daisy Jonkers
- Department of Internal Medicine, Nutrition and Toxicology Research Institute Maastricht, School for Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Lin Chang
- G. Oppenheimer Center for Neurobiology of Stress and Resilience, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, California
| | - Emeran A Mayer
- G. Oppenheimer Center for Neurobiology of Stress and Resilience, Vatche and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at University of California-Los Angeles, Los Angeles, California
| | - Mira M Wouters
- Translational Research Center for Gastro Intestinal Disorders, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Guy Boeckxstaens
- Translational Research Center for Gastro Intestinal Disorders, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Michael Camilleri
- Clinical Enteric Neuroscience Translational and Epidemiological Research, and Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Rochester, Minnesota
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Alexandra Zhernakova
- Department of Genetics, University Medical Center Groningen, Groningen, The Netherlands
| | - Mauro D'Amato
- Unit of Gastrointestinal Genetics, Department of Gastrointestinal and Liver Diseases, Biodonostia Health Research Institute, San Sebastián, Spain; Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden; Unit of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden; Ikerbasque, Basque Science Foundation, Bilbao, Spain.
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Kamali H, Khodaverdi E, Hadizadeh F. Ring-opening polymerization of PLGA-PEG-PLGA triblock copolymer in supercritical carbon dioxide. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2018.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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11
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Hadizadeh F, Bonfiglio F, Belheouane M, Vallier M, Sauer S, Bang C, Bujanda L, Andreasson A, Agreus L, Engstrand L, Talley NJ, Rafter J, Baines JF, Walter S, Franke A, D’Amato M. Faecal microbiota composition associates with abdominal pain in the general population. Gut 2018; 67:778-779. [PMID: 28765473 PMCID: PMC6058062 DOI: 10.1136/gutjnl-2017-314792] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 07/13/2017] [Indexed: 12/08/2022]
Affiliation(s)
- Fatemeh Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden,Gastroenterology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Ferdinando Bonfiglio
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden,Department of Gastrointestinal and Liver Diseases, BioDonostia Health Research Institute, San Sebastian, Spain
| | - Meriem Belheouane
- Institute of Experimental Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany,Evolutionary Genomics, Max Planck Institute for Evolutionary Biology, Plön, Germany
| | - Marie Vallier
- Institute of Experimental Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany,Evolutionary Genomics, Max Planck Institute for Evolutionary Biology, Plön, Germany
| | - Sascha Sauer
- Max Delbrück Center for Molecular Medicine (BIMSB/BIH), Berlin, Germany
| | - Corinna Bang
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Luis Bujanda
- Department of Gastrointestinal and Liver Diseases, BioDonostia Health Research Institute, San Sebastian, Spain,Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Universidad del País Vasco UPV/EHU, San Sebastián, Spain
| | - Anna Andreasson
- Division of Family Medicine and Primary Care, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden,Stress Research Institute, Stockholm University, Stockholm, Sweden
| | - Lars Agreus
- Division of Family Medicine and Primary Care, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Lars Engstrand
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden,Clinical Genomics Facility, Science for Life Laboratory, Solna, Sweden
| | - Nicholas J Talley
- Division of Family Medicine and Primary Care, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden,Faculty of Health and Medicine, University of Newcastle, Newcastle, Australia,Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, USA,Australian GI Research Alliance (AGIRA), Australia
| | - Joseph Rafter
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - John F Baines
- Institute of Experimental Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany,Evolutionary Genomics, Max Planck Institute for Evolutionary Biology, Plön, Germany
| | - Susanna Walter
- Division of Gastroenterology, Institution of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Mauro D’Amato
- Department of Gastrointestinal and Liver Diseases, BioDonostia Health Research Institute, San Sebastian, Spain,Department of Medicine, Unit of Clinical Epidemiology, Karolinska Institutet, Stockholm, Sweden,IKERBASQUE, Basque Science Foundation, Bilbao, Spain
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12
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Henström M, Diekmann L, Bonfiglio F, Hadizadeh F, Kuech EM, von Köckritz-Blickwede M, Thingholm LB, Zheng T, Assadi G, Dierks C, Heine M, Philipp U, Distl O, Money ME, Belheouane M, Heinsen FA, Rafter J, Nardone G, Cuomo R, Usai-Satta P, Galeazzi F, Neri M, Walter S, Simrén M, Karling P, Ohlsson B, Schmidt PT, Lindberg G, Dlugosz A, Agreus L, Andreasson A, Mayer E, Baines JF, Engstrand L, Portincasa P, Bellini M, Stanghellini V, Barbara G, Chang L, Camilleri M, Franke A, Naim HY, D'Amato M. Functional variants in the sucrase-isomaltase gene associate with increased risk of irritable bowel syndrome. Gut 2018; 67:263-270. [PMID: 27872184 PMCID: PMC5563477 DOI: 10.1136/gutjnl-2016-312456] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 10/29/2016] [Accepted: 10/31/2016] [Indexed: 12/11/2022]
Abstract
OBJECTIVE IBS is a common gut disorder of uncertain pathogenesis. Among other factors, genetics and certain foods are proposed to contribute. Congenital sucrase-isomaltase deficiency (CSID) is a rare genetic form of disaccharide malabsorption characterised by diarrhoea, abdominal pain and bloating, which are features common to IBS. We tested sucrase-isomaltase (SI) gene variants for their potential relevance in IBS. DESIGN We sequenced SI exons in seven familial cases, and screened four CSID mutations (p.Val557Gly, p.Gly1073Asp, p.Arg1124Ter and p.Phe1745Cys) and a common SI coding polymorphism (p.Val15Phe) in a multicentre cohort of 1887 cases and controls. We studied the effect of the 15Val to 15Phe substitution on SI function in vitro. We analysed p.Val15Phe genotype in relation to IBS status, stool frequency and faecal microbiota composition in 250 individuals from the general population. RESULTS CSID mutations were more common in patients than asymptomatic controls (p=0.074; OR=1.84) and Exome Aggregation Consortium reference sequenced individuals (p=0.020; OR=1.57). 15Phe was detected in 6/7 sequenced familial cases, and increased IBS risk in case-control and population-based cohorts, with best evidence for diarrhoea phenotypes (combined p=0.00012; OR=1.36). In the population-based sample, 15Phe allele dosage correlated with stool frequency (p=0.026) and Parabacteroides faecal microbiota abundance (p=0.0024). The SI protein with 15Phe exhibited 35% reduced enzymatic activity in vitro compared with 15Val (p<0.05). CONCLUSIONS SI gene variants coding for disaccharidases with defective or reduced enzymatic activity predispose to IBS. This may help the identification of individuals at risk, and contribute to personalising treatment options in a subset of patients.
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Affiliation(s)
- Maria Henström
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Lena Diekmann
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Ferdinando Bonfiglio
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Fatemeh Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Eva-Maria Kuech
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | - Louise B Thingholm
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Tenghao Zheng
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Ghazaleh Assadi
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Claudia Dierks
- Department of Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Martin Heine
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Ute Philipp
- Department of Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Ottmar Distl
- Department of Animal Breeding and Genetics, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Mary E Money
- Internal Medicine Department, University of Maryland School of Medicine, Baltimore, Maryland, USA,Meritus Medical Center, Hagerstown, Maryland, USA
| | - Meriem Belheouane
- Max Planck Institute for Evolutionary Biology, Plön, Germany,Institute for Experimental Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Femke-Anouska Heinsen
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Joseph Rafter
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Gerardo Nardone
- Gastroenterology Unit, Department of Clinical Medicine and Surgery, Federico II University Hospital, Naples, Italy
| | - Rosario Cuomo
- Diagnosis and Therapy of Digestive Motility Diseases, Department of Clinical Medicine and Surgery, Federico II University Hospital, Naples, Italy
| | - Paolo Usai-Satta
- S.C. Gastroenterologia, Azienda Ospedaliera G. Brotzu, Cagliari, Italy
| | | | - Matteo Neri
- Department of Medicine and Aging Sciences and CeSi, G. D'Annunzio University, Chieti, Italy
| | - Susanna Walter
- Division of Neuro and Inflammation Science, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Magnus Simrén
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden,Center for Functional GI and Motility Disorders, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Pontus Karling
- Division of Medicine, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Bodil Ohlsson
- Division of Internal Medicine, Department of Clinical Sciences, Skåne University Hospital, Malmö, Sweden,Division of Internal Medicine, Department of Clinical Sciences, Lund University, Lund, Sweden
| | - Peter T Schmidt
- Department of Medicine, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - Greger Lindberg
- Department of Medicine, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - Aldona Dlugosz
- Department of Medicine, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital, Stockholm, Sweden
| | - Lars Agreus
- Division for Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Stockholm, Sweden
| | - Anna Andreasson
- Division for Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Huddinge, Stockholm, Sweden,Stress Research Institute, Stockholm University, Stockholm, Sweden
| | - Emeran Mayer
- Division of Digestive Diseases, Oppenheimer Center for the Neurobiology of Stress, David Geffen School of Medicine, University of California, Los Angeles, USA
| | - John F Baines
- Max Planck Institute for Evolutionary Biology, Plön, Germany,Institute for Experimental Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Lars Engstrand
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
| | - Piero Portincasa
- Department of Biomedical Sciences and Human Oncology, University of Bari ‘Aldo Moro’, Bari, Italy
| | - Massimo Bellini
- Gastrointestinal Unit, Department of Gastroenterology, University of Pisa, Pisa, Italy
| | - Vincenzo Stanghellini
- Department of Medical and Surgical Sciences, University of Bologna, St. Orsola-Malpighi Hospital, Bologna, Italy
| | - Giovanni Barbara
- Department of Medical and Surgical Sciences, University of Bologna, St. Orsola-Malpighi Hospital, Bologna, Italy
| | - Lin Chang
- Division of Digestive Diseases, Oppenheimer Center for the Neurobiology of Stress, David Geffen School of Medicine, University of California, Los Angeles, USA
| | - Michael Camilleri
- Clinical Enteric Neuroscience Translational and Epidemiological Research, Mayo Clinic, Rochester, Minnesota, USA
| | - Andre Franke
- Institute of Clinical Molecular Biology, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Hassan Y Naim
- Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Mauro D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden,BioDonostia Health Research Institute, San Sebastian and IKERBASQUE, Basque Science Foundation, Bilbao, Spain,Unit of Clinical Epidemiology, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
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13
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Henström M, Hadizadeh F, Beyder A, Bonfiglio F, Zheng T, Assadi G, Rafter J, Bujanda L, Agreus L, Andreasson A, Dlugosz A, Lindberg G, Schmidt PT, Karling P, Ohlsson B, Talley NJ, Simren M, Walter S, Wouters M, Farrugia G, D'Amato M. TRPM8 polymorphisms associated with increased risk of IBS-C and IBS-M. Gut 2017; 66:1725-1727. [PMID: 27974553 PMCID: PMC5561393 DOI: 10.1136/gutjnl-2016-313346] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 11/20/2016] [Accepted: 11/23/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Maria Henström
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Fatemeh Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden,School of Nutrition, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Arthur Beyder
- Enteric Neuroscience Program, Division of Gastroenterology and Hepatology, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Ferdinando Bonfiglio
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden,Department of Gastrointestinal and Liver Diseases, BioDonostia Health Research Institute, San Sebastian, Spain
| | - Tenghao Zheng
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Ghazaleh Assadi
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Joseph Rafter
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Luis Bujanda
- Department of Gastrointestinal and Liver Diseases, BioDonostia Health Research Institute, San Sebastian, Spain
| | - Lars Agreus
- Division for Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Anna Andreasson
- Division for Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden,Stress Research Institute, Stockholm University, Stockholm, Sweden
| | - Aldona Dlugosz
- Department of Medicine, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Greger Lindberg
- Department of Medicine, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Peter T Schmidt
- Department of Medicine, Karolinska Institutet, Center for Digestive Diseases, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Pontus Karling
- Division of Medicine, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Bodil Ohlsson
- Department of Internal Medicine, Lund University, Skåne University Hospital, Sweden
| | - Nicholas J Talley
- Faculty of Health and Medicine, University of Newcastle, Newcastle, New South Wales, Australia
| | - Magnus Simren
- Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Susanna Walter
- Division of Neuro and Inflammation Science, Department of Clinical and Experimental Medicine,Linköping University, Linköping, Sweden
| | - Mira Wouters
- Translational Research Center for Gastrointestinal Disorders (TARGID), Leuven University, Leuven, Belgium
| | - Gianrico Farrugia
- Enteric Neuroscience Program, Division of Gastroenterology and Hepatology, Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, Minnesota, USA
| | - Mauro D'Amato
- Department of Gastrointestinal and Liver Diseases, BioDonostia Health Research Institute, San Sebastian, Spain,BioCruces Health Research Institute, Bilbao, Spain,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain,Clinical Epidemiology Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
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14
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Hadizadeh F, Faghihimani E, Adibi P. Nonalcoholic fatty liver disease: Diagnostic biomarkers. World J Gastrointest Pathophysiol 2017; 8:11-26. [PMID: 28573064 PMCID: PMC5437499 DOI: 10.4291/wjgp.v8.i2.11] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/30/2016] [Accepted: 02/13/2017] [Indexed: 02/06/2023] Open
Abstract
Nonalcoholic fatty liver disease is a common medical condition worldwide and its prevalence has increased notably in the past few years due to the increases in prevalence of obesity and metabolic syndrome. However, diagnosis of this disease is still a matter of debate because of disease variations and pathophysiologic alterations. Specific single markers have gained considerable attention recently, among them markers related to hepatic pathophysiology, inflammation, adipocytokines and so forth. But, it seems that no single marker is sufficient for diagnosis and staging of the disease, and applying a panel including different types of tests may be more useful.
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15
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Jankipersadsing SA, Hadizadeh F, Bonder MJ, Tigchelaar EF, Deelen P, Fu J, Andreasson A, Agreus L, Walter S, Wijmenga C, Hysi P, D'Amato M, Zhernakova A. A GWAS meta-analysis suggests roles for xenobiotic metabolism and ion channel activity in the biology of stool frequency. Gut 2017; 66:756-758. [PMID: 27473416 PMCID: PMC5529970 DOI: 10.1136/gutjnl-2016-312398] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 06/20/2016] [Accepted: 07/04/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Soesma A Jankipersadsing
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands,Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Fatemeh Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden,School of Nutrition, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Marc Jan Bonder
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ettje F Tigchelaar
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands,Top Institute Food and Nutrition, Wageningen, The Netherlands
| | - Patrick Deelen
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands,University of Groningen, University Medical Center Groningen, Genomics Coordination Center, Groningen, The Netherlands
| | - Jingyuan Fu
- Department of Pediatrics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands,Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Anna Andreasson
- Division of Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden,Stress Research Institute, Stockholm University, Stockholm, Sweden
| | - Lars Agreus
- Division of Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Susanna Walter
- Division of Gastroenterology, Institution of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Cisca Wijmenga
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Pirro Hysi
- Department of Ophthalmology, King's College London, St Thomas’ Hospital Campus, London, UK
| | - Mauro D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden,BioDonostia Health Research Institute San Sebastian and IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Alexandra Zhernakova
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands,University of Groningen, University Medical Center Groningen, Genomics Coordination Center, Groningen, The Netherlands
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16
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Hadizadeh F, Walter S, Belheouane M, Bonfiglio F, Heinsen FA, Andreasson A, Agreus L, Engstrand L, Baines JF, Rafter J, Franke A, D'Amato M. Stool frequency is associated with gut microbiota composition. Gut 2017; 66:559-560. [PMID: 27196592 DOI: 10.1136/gutjnl-2016-311935] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2016] [Accepted: 04/12/2016] [Indexed: 12/12/2022]
Affiliation(s)
- Fatemeh Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.,School of Nutrition, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Susanna Walter
- Division of Gastroenterology, Institution of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Meriem Belheouane
- Max Planck Institute for Evolutionary Biology, Plön, Germany.,Institute for Experimental Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Ferdinando Bonfiglio
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | | | - Anna Andreasson
- Division for Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden.,Stress Research Institute, Stockholm University, Stockholm, Sweden
| | - Lars Agreus
- Division for Family Medicine, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden
| | - Lars Engstrand
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.,Clinical Genomics Facility, Science for Life Laboratory, Stockholm, Sweden
| | - John F Baines
- Max Planck Institute for Evolutionary Biology, Plön, Germany.,Institute for Experimental Medicine, Christian-Albrechts-University of Kiel, Kiel, Germany
| | - Joseph Rafter
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - Andre Franke
- Institute of Clinical Molecular Biology, Kiel University, Kiel, Germany
| | - Mauro D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.,BioCruces Health Research Institute and IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
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17
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Assadi G, Saleh R, Hadizadeh F, Vesterlund L, Bonfiglio F, Halfvarson J, Törkvist L, Eriksson AS, Harris HE, Sundberg E, D'Amato M. LACC1 polymorphisms in inflammatory bowel disease and juvenile idiopathic arthritis. Genes Immun 2016; 17:261-4. [PMID: 27098602 DOI: 10.1038/gene.2016.17] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 03/22/2016] [Accepted: 03/24/2016] [Indexed: 02/06/2023]
Abstract
The function of the Laccase domain-containing 1 (LACC1) gene is unknown, but genetic variation at this locus has been reported to consistently affect the risk of Crohn's disease (CD) and leprosy. Recently, a LACC1 missense mutation was found in patients suffering from monogenic forms of CD, but also systemic juvenile idiopathic arthritis. We tested the hypothesis that LACC1 single nucleotide polymorphisms (SNPs), in addition to CD, are associated with juvenile idiopathic arthritis (JIA, non-systemic), and another major form of inflammatory bowel disease, ulcerative colitis (UC). We selected 11 LACC1 tagging SNPs, and tested their effect on disease risk in 3855 Swedish individuals from three case-control cohorts of CD, UC and JIA. We detected false discovery rate corrected significant associations with individual markers in all three cohorts, thereby expanding previous results for CD also to UC and JIA. LACC1's link to several inflammatory diseases suggests a key role in the human immune system and justifies further characterization of its function(s).
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Affiliation(s)
- G Assadi
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - R Saleh
- Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - F Hadizadeh
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - L Vesterlund
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - F Bonfiglio
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden
| | - J Halfvarson
- Department of Gastroenterology, Faculty of Medicine and Health, Örebro University, Örebro, Sweden
| | - L Törkvist
- Gastrocentrum, Karolinska University Hospital, StockhoCrohn'slm, Sweden
| | - A S Eriksson
- Gatroenterology Unit, Department of Internal Medicine, Sahlgren's University Hospital/Östra, Göteborg, Sweden
| | - H E Harris
- Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - E Sundberg
- Department of Women's and Children's Health, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - M D'Amato
- Department of Biosciences and Nutrition, Karolinska Institutet, Stockholm, Sweden.,BioCruces Health Research Institute and IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
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Kamali H, Khodaverdi E, Hadizadeh F, Ghaziaskar S. Optimization of phenolic and flavonoid content and antioxidants capacity of pressurized liquid extraction from Dracocephalum kotschyi via circumscribed central composite. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2015.09.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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19
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Roghani-Dehkordi F, Hadizadeh M, Hadizadeh F. Percutaneous trans-ulnar artery approach for coronary angiography and angioplasty; A case series study. ARYA Atheroscler 2015; 11:305-9. [PMID: 26715936 PMCID: PMC4680079] [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] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Coronary angiography is the gold standard method for diagnosis of coronary heart disease and usually performed by femoral approach that has several complications. To reduce these complications, upper extremity approach is increasingly used and is becoming preferred access site by many interventionists. Although radial approach is relatively well studied, safety, feasibility and risk of applying ulnar approach in not clearly known yet. METHODS We followed 97 patients (man = 56%, mean ± standard deviation of age = 57 ± 18) who had undergone coronary angiography or angioplasty via ulnar approach for 6-10 months and recorded their outcomes. RESULTS In 97 patients out of 105 ones (92.38%), procedure through ulnar access were successfully done. Unsuccessful puncture (3 patients), wiring (2 patients), passing of sheet (2 patients), and anatomically unsuitable ulnar artery (1 patient) were the reasons of failure. In 94 patients (89.52%), the angiography and angioplasty was done without any complications. Five patients (5.1%) hematoma and 11 patients (11%) experienced low-grade pain that resolved with painkiller. No infection, amputation or need for surgery was reported. CONCLUSION This study demonstrated that ulnar access in our patients was a safe and practical approach for coronary angiography or angioplasty, without any major complication. Bearing in mind its high success rate, it can be utilized when a radial artery is not useful for the catheterization and in cases such as prior harvesting of the radial artery (in prior coronary artery bypass grafting).
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Affiliation(s)
- Farshad Roghani-Dehkordi
- Associate Professor, Department of Cardiology and Intervention, Cardiac Rehabilitation Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran,Correspondence to: Farshad Roghani-Dehkordi,
| | - Mahmood Hadizadeh
- Cardiologist, Intervention Fellowship Practitioner, Isfahan Cardiovascular Research Center, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
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Moallem S, Dehghani N, Mehri S, Shahsavand S, Alibolandi M, Hadizadeh F. Synthesis of novel 1,8-acridinediones derivatives: Investigation of MDR reversibility on breast cancer cell lines T47D and tamoxifen-resistant T47D. Res Pharm Sci 2015; 10:214-21. [PMID: 26600848 PMCID: PMC4621628] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Multi drug resistance (MDR) is a serious obstacle in the management of breast cancer. Therefore, overcoming MDR using novel anticancer agents is a top priority for medicinal chemists. It was found that dihydropyridines lacking calcium antagonistic activity (e.g acridinediones) possess MDR modifier potency. In this study, the capability of four novel acridine-1,8-diones derivatives 3a-d were evaluated as MDR reversing agents. In addition, the relationship between structural properties and biological effects of synthesized compounds was discussed. In vitro cytotoxicity of acridine-1,8-diones 3a-d derivatives in combination with doxorubicin (DOX) on T47D and tomoxifen-resistant T47D (TAMR-6) breast cancer cell lines were investigated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) test. Drug resistant index (DRI), which is equal to the ratio of IC50 in drug-resistant cells over IC50 in drug-sensitive cells, was calculated for each substance. Flowcytometry experiments were also implemented to distinguish cells undergoing apoptosis from those undergoing necrosis. The results from MTT and flowcytometry experiments indicated that 1 nM 3c derivative along with DOX significantly (P<0.05) increased the DOX cytotoxicity in T47D and TAMR-6 breast cancer cell lines. Synthesized compounds 3a and 3b also at concentrations of 1 nM with DOX significantly increased the cytotoxicity of DOX on T47D and TAMR-6 breast cancer cell lines. Meanwhile, 3d derivative with DOX did not exhibit good synergistic effect on cytotoxic activity of DOX, and slightly increased DOX cytotoxicity in both cell lines. Our results proposed that 3c may be an attractive lead compound for further development as a chemotherapeutic agent for MDR breast cancer therapy in combination with routine chemotherapeutic agents such as DOX.
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Affiliation(s)
- S.A. Moallem
- Pharmaceutical Research Center, Mashhad University of Medical Sciences, Mashhad, I.R. Iran,Medical Toxicology Research Center, Mashhad University of Medical Sciences, Mashhad, I.R. Iran,Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - N. Dehghani
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - S. Mehri
- Department of Pharmacodynamics and Toxicology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - Sh. Shahsavand
- Department of Molecular Sciences, School of Medicine, North Khorasan University of Medical Sciences, Bojnurd, I.R. Iran
| | - M. Alibolandi
- Biotechnology Research center, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - F. Hadizadeh
- Biotechnology Research center, Mashhad University of Medical Sciences, Mashhad, I.R. Iran,Corresponding author: F. Hadizadeh Tel: 0098 511 7112420, Fax: 0098 511 7112470
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Sanei MH, Hadizadeh F, Adibi P, Alavi SA. Inflammatory cells' role in acetic acid-induced colitis. Adv Biomed Res 2014; 3:193. [PMID: 25337523 PMCID: PMC4202508 DOI: 10.4103/2277-9175.140666] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Accepted: 07/25/2012] [Indexed: 02/07/2023] Open
Abstract
Background: Free radicals are the known mechanisms responsible for inducing colitis with two origins: Inflammatory cells and tissues. Only the inflammatory cells can be controlled by corticosteroids. Our aim was to assess the importance of neutrophils as one of the inflammatory cells in inducing colitis and to evaluate the efficacy of corticosteroids in the treatment of inflammatory bowel disease (IBD). Materials and Methods: Thirty-six mice were divided into six groups of six mice each. Colitis was induced in three groups by exposing them to acetic acid through enema (group 1), ex vivo (group 3), and enema after immune suppression (group 5). Each group had one control group that was exposed to water injection instead of acetic acid. Tissue samples were evaluated and compared based on macroscopic damages and biochemical and pathological results. Results: Considering neutrophilic infiltration, there were significant differences between groups 1, 3, 5, and the control of group 1. Groups 3, 5, and their controls, and group 1 and the control of group 3 had significant differences in terms of goblet depletion. Based on tissue originated H2O2, we found significant differences between group 1 and its control and group 3, and also between groups 5 and the control of group 3. All the three groups were significantly different from their controls based on Ferric Reducing Ability of Plasma (FRAP) and such differences were also seen between group 1 with two other groups. Conclusion: Neutrophils may not be the only cause of oxidation process in colitis, and also makes the effectiveness of corticosteroids in the treatment of this disease doubtful.
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Affiliation(s)
- Mohammad H Sanei
- Department of Pathology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Fatemeh Hadizadeh
- Integrated Functional Gastroenterology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran ; East Sage Co, Isfahan Science and Technology Town, Isfahan, Iran
| | - Peyman Adibi
- Integrated Functional Gastroenterology Research Center, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Sayyed Ali Alavi
- East Sage Co, Isfahan Science and Technology Town, Isfahan, Iran
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Hadizadeh F, Rahimi B, Taghiabadi E, Razavi M, Karimi G. Evaluation of anticonvulsant effect of two novels 4-[1-(4-fluorobenzyl)- 5-imidazolyl] dihydropyridine derivatives in mice. Res Pharm Sci 2013; 8:91-5. [PMID: 24019818 PMCID: PMC3764680] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
In this study the anticonvulsant effect of two dihydropyridine derivatives [diethyl -1,4- dihydro -2,6-dimethyl -4-(4- fluoro benzyl-2- methylthio -5- imidazolyl)-3,5- pyridine dicarboxilat (A) and diethyl -1,4-dihydro -2,6- diethyl -4-(4- fluoro benzyl-2- methylthio -5- imidazolyl)-3,5- pyridine dicarboxilat (B)] by pentylenetetrazole (PTZ) and electroshock in mice was evaluated. The latency and HLTE (hind limb tonic extensions), the duration of HLTE and the mortality protection in pentylenetetrazole test and the HLTE duration in electroshock test were assessed. Both compounds had significant differences with negative control in all doses used. There was no significant difference between nifedipine and B (96.7 and 169.2 mg/kg doses) in the starting point of HLTE and between nifedipine andA(62.2 and 108.9 mg/kg doses) in the duration of HLTE in the PTZ test. Also, there was no significant difference between nifedipine and B (96.7 and 169.2 mg/kg doses) andA(62.2 and 108.9 mg/kg doses) in electroshock test. All doses ofAand B and nifedipine showed less effect than phenytoin and valproate. This study showed that bothAand B have anticonvulsant activity in the PTZ-induced seizure model and the MES test. These compounds, thus, might be useful in the petit mal and grand mal epilepsy.
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Affiliation(s)
- F Hadizadeh
- Biotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - B Rahimi
- Pharmacy School, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - E Taghiabadi
- Pharmacodynamy and toxicology department, Pharmacy School, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - M Razavi
- Pharmacodynamy and toxicology department, Pharmacy School, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
| | - G Karimi
- Medical Toxicology Research Center and Pharmacy School, Mashhad University of Medical Sciences, Mashhad, I.R. Iran
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Monajemi A, Arabshahi KS, Soltani A, Arbabi F, Akbari R, Custers E, Hadadgar A, Hadizadeh F, Changiz T, Adibi P. A comprehensive test of clinical reasoning for medical students: An olympiad experience in Iran. J Educ Health Promot 2012; 1:10. [PMID: 23555113 PMCID: PMC3577397 DOI: 10.4103/2277-9531.94420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Although some tests for clinical reasoning assessment are now available, the theories of medical expertise have not played a major role in this filed. In this paper, illness script theory was chose as a theoretical framework and contemporary clinical reasoning tests were put together based on this theoretical model. MATERIALS AND METHODS This paper is a qualitative study performed with an action research approach. This style of research is performed in a context where authorities focus on promoting their organizations' performance and is carried out in the form of teamwork called participatory research. RESULTS Results are presented in four parts as basic concepts, clinical reasoning assessment, test framework, and scoring. CONCLUSION we concluded that no single test could thoroughly assess clinical reasoning competency, and therefore a battery of clinical reasoning tests is needed. This battery should cover all three parts of clinical reasoning process: script activation, selection and verification. In addition, not only both analytical and non-analytical reasoning, but also both diagnostic and management reasoning should evenly take into consideration in this battery. This paper explains the process of designing and implementing the battery of clinical reasoning in the Olympiad for medical sciences students through an action research.
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Affiliation(s)
- Alireza Monajemi
- Department of Philosophy of Science, Institute for Humanities and Cultural Studies, Tehran, Iran.
| | | | - Akbar Soltani
- Endocrinology and Metabolism Research Center (EMRC), Tehran University of Medical Sciences, Tehran, Iran.
| | - Farshid Arbabi
- Department of Oncology, Zahedan University of Medical Sciences, Zahedan, Iran.
| | - Roghieh Akbari
- Department of Internal Medicine, School of Medicine, Babol University of Medical Sciences, Babol, Iran.
| | - Eugene Custers
- Medical Education Development Center, University of Utrecht Medical Center, Utrecht, Netherlands, Iran.
| | - Arash Hadadgar
- Medical Education Development Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Fatemeh Hadizadeh
- Medical Education Development Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Tahereh Changiz
- Medical Education Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Peyman Adibi
- Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
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Hadizadeh F, Mohajeri SA, Seifi M. Extraction and purification of crocin from saffron stigmas employing a simple and efficient crystallization method. Pak J Biol Sci 2010; 13:691-698. [PMID: 21848061 DOI: 10.3923/pjbs.2010.691.698] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [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: 05/31/2023]
Abstract
In this study, total crocin was extracted from saffron stigmas using crystallization method. Ethanol 80% was selected as the best extraction solvent. Crystallization process was carried out in one and two steps at different temperatures. Ethanol 80% was used as crystallization medium. Crocin crystals obtained from the first crystallization had low purity and thus were subjected to the second crystallization. The higher purity crystals were yielded in the second crystallization at -5 degrees C. The purity of crocin crystals was studied using UV-visible spectrophotometery and HPLC in comparison with Fluka product and methanolic extract of saffron stigmas. The results indicated that its purity was extremely higher, about 13 times, more than Fluka product. In spite of our expectation, the Fluka product was not a pure alpha-crocin sample; five other types of crocins in addition to an unknown impurity were seen in its chromatogram. The purity of crystallized total crocin in this work was more than 97%.
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Affiliation(s)
- F Hadizadeh
- Biotechnology Research Center, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
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Entezari MH, Asghari A, Hadizadeh F. Sono-synthesis of imidazolidine-2-thione as a base compound of some pharmaceutical products. Ultrason Sonochem 2008; 15:119-23. [PMID: 17446113 DOI: 10.1016/j.ultsonch.2007.02.006] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Received: 11/02/2006] [Revised: 02/12/2007] [Accepted: 02/17/2007] [Indexed: 05/15/2023]
Abstract
This work describes the results of investigations carried out to investigate the synthesis of imidazolidine-2-thione as a heterocyclic compound in the presence of ultrasound (sono-synthesis) and in the absence of ultrasound (conventional method). Instead of reflux in the conventional method, the mixture was sonicated indirectly in sono-synthetic method with 500 kHz at different temperatures. Some experiments were also carried out without catalyst with 500 and 900 kHz. In the conventional method, the yield of the reaction was increased by increasing the temperature but in sono-synthetic method, the thermal dependence was different in the range of temperature studied (10-50 degrees C). In the presence of ultrasound, the yield was reached to more than 93% after 1h but in the conventional method it reached only 27% under the same conditions. Comparison was carried out with and without catalyst. It is also possible to achieve a high yield of product under sonication without the use of a catalyst.
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Affiliation(s)
- M H Entezari
- Department of Chemistry, Ferdowsi University of Mashhad, 91775, Mashhad, Iran.
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Hadizadeh F, Mahdavi M, Emami S, Khashayarmanesh Z, Hassanzadeh M, Asili J, Seifi M, Nassirli H, Shariatimoghadam A, Noorbakhsh R. EVALUATION OF ISO METHOD IN SAFFRON QUALIFICATION. ACTA ACUST UNITED AC 2007. [DOI: 10.17660/actahortic.2007.739.53] [Citation(s) in RCA: 24] [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: 11/17/2022]
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Hadizadeh F, Shafiee A, Kazemi R, Mohammadi M. Synthesis of 4-(1-Phenylmethyl-5-imidazolyl)-1,4-dihydropyridines as Calcium Channel Antagonists. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/chin.200313145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Shafiee A, Mojarrad JS, Jalili MA, Adhami HR, Hadizadeh F. Syntheses of substituted pyrrolo[2,3-d]imidazole-5-carboxylates and substitued pyrrolo[3,2-d]imidazole-5-carboxylates. J Heterocycl Chem 2002. [DOI: 10.1002/jhet.5570390221] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Shafiee A, Hadizadeh F, Noori SB. Syntheses of 2-alkylthio-1-[4-(N-α-ethoxycarbonylbenzyl)-aminobenzyl]-5-hydroxymethylimidazoles. J Heterocycl Chem 2000. [DOI: 10.1002/jhet.5570370454] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Shafiee A, Dehpour AR, Hadizadeh F, Azimi M. Syntheses and calcium channel antagonist activity of nifedipine analogues with methylsulfonylimidazolyl substituent. Pharm Acta Helv 1998; 73:75-9. [PMID: 9700935 DOI: 10.1016/s0031-6865(98)00004-1] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Various diester analogues of nifedipine in which the ortho nitrophenyl group at position 4 is replaced by 1-methyl-2-methylsulfonyl-5-imidazolyl substituent, were synthesized and evaluated as calcium channel antagonists on guinea-pig ileal smooth muscle. Nifedipine was used as a standard. Compound 6n was found to be the most active.
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Affiliation(s)
- A Shafiee
- Department of Chemistry, Faculty of Pharmacy, Medical Sciences University of Tehran, Iran
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Ghanbarpour A, Hadizadeh F, Piri F, Rashidi-Ranjbar P. Synthesis, conformational analysis and antidepressant activity of moclobemide new analogues. Pharm Acta Helv 1997; 72:119-22. [PMID: 9112832 DOI: 10.1016/s0031-6865(97)00004-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Three new analogues of moclobemide are synthesized. Antidepressant activity of compounds assayed by the Porsolt method reveals that the morpholine ring in moclobemide is one of the key structural parts necessary for antidepressant activity. Superimposition of norepinephrine and gauche forms of serotonin and mociobemide suggest that the phenyl ring, electronegative group attached to the aromatic ring and the amine terminal group may serve as the recognition elements for binding to monoamine oxidase-A (MAO-A).
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Affiliation(s)
- A Ghanbarpour
- Department of Organic Chemistry, Faculty of Pharmacy, Medical Science, University of Tehran, Iran
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