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Liu Y, Liu T, Li X, Li T, Ma X, Zhao D, Zheng X, Zhao X. Effects of tonsillectomy and adenoidectomy on the immune system. Heliyon 2024; 10:e32116. [PMID: 38975198 PMCID: PMC11226771 DOI: 10.1016/j.heliyon.2024.e32116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 05/25/2024] [Accepted: 05/28/2024] [Indexed: 07/09/2024] Open
Abstract
Surgical removal of the tonsils and adenoids, important immune organs, is a frequent and recurrent class of surgery, and currently, there is no consensus on the effects these surgical procedures may have on the immune system. Here, we examine individual studies on tonsillectomy, adenoidectomy, and adenotonsillectomy, discuss their postoperative humoral and cellular immune changes, and explore their effects on the incidence of related diseases. There is evidence that these three surgeries have no negative effects on humoral immunity; however, there has been contrary results. Furthermore, these procedures seem to have no significant effects on cellular immunity, although tonsil and adenoid removal can cause an increased incidence of certain illnesses, especially infectious diseases. Based on this comprehensive review, we conclude that the removal of tonsils and adenoids does not negatively affect cellular and humoral immunity. However, surgery may lead to an increased incidence of related infectious diseases. This finding may inform the surgeon's decision to perform the procedure in a clinical setting.
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Affiliation(s)
- Yueyang Liu
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Ting Liu
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Xinyi Li
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Tianshu Li
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Xiangchi Ma
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Dongxu Zhao
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Xueke Zheng
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
| | - Xudong Zhao
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, Shenyang, 110004, China
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2
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Chu X, Chen X, Zhang H, Wang Y, Guo H, Chen Y, Liu X, Zhu Z, He Y, Ding X, Wang Q, Zheng C, Cao X, Yang H, Qian J. Association of diet and outdoor time with inflammatory bowel disease: a multicenter case-control study using propensity matching analysis in China. Front Public Health 2024; 12:1368401. [PMID: 38952728 PMCID: PMC11215971 DOI: 10.3389/fpubh.2024.1368401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 04/09/2024] [Indexed: 07/03/2024] Open
Abstract
Objective To investigate the association between dietary and some other environmental factors and the risk of inflammatory bowel diseases (IBD) in Chinese population. Materials and methods A multicenter case-control study was conducted involving 11 hospitals across China. A total of 1,230 subjects were enrolled consecutively, and diet and environmental factor questionnaires were collected. IBD patients were matched with healthy controls (HC) using propensity-score matching (PSM) at a 1:1 ratio with a caliper value of 0.02. Multivariate conditional logistic regression analyses were performed to evaluate the associations between diet, environmental factors, and IBD. Results Moderate alcohol and milk consumption, as well as daily intake of fresh fruit, were protective factors for both Crohn's disease (CD) and ulcerative colitis (UC). Conversely, the consumption of eggs and chocolate increased the risk of IBD. Outdoor time for more than 25% of the day was a protective factor only for CD. In eastern regions of China, CD patients had higher egg consumption and less outdoor time, while UC patients consumed more chocolate. IBD patients from urban areas or with higher per capita monthly income consumed more fruit, eggs, and chocolate. Conclusions This study reveals an association between specific foods, outdoor time, and the emergence of IBD in the Chinese population. The findings emphasize the importance of a balanced diet, sufficient outdoor time and activities, and tailored prevention strategies considering regional variations.
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Affiliation(s)
- Xiaotian Chu
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Xuanfu Chen
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Huimin Zhang
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yufang Wang
- Department of Gastroenterology, Sichuan University West China Hospital, Chengdu, China
| | - Hong Guo
- Department of Gastroenterology, Xinqiao Hospital, Army Medical University, Chongqing, China
| | - Yan Chen
- Department of Gastroenterology, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xiaowei Liu
- Department of Gastroenterology, Xiangya Hospital, Central South University, Changsha, China
| | - Zhenhua Zhu
- Department of Gastroenterology, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yao He
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Xueli Ding
- Department of Gastroenterology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Qunying Wang
- Gastroenterology and Hepatology, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Changqing Zheng
- Department of Gastroenterology, Shengjing Hospital, China Medical University, Shenyang, China
| | - Xiaocang Cao
- Department of Gastroenterology and Hepatology, Tianjin Medical University General Hospital, Tianjin, China
| | - Hong Yang
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Jiaming Qian
- Department of Gastroenterology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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3
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Lin Z, Luo W, Zhang K, Dai S. Environmental and Microbial Factors in Inflammatory Bowel Disease Model Establishment: A Review Partly through Mendelian Randomization. Gut Liver 2024; 18:370-390. [PMID: 37814898 PMCID: PMC11096900 DOI: 10.5009/gnl230179] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 07/09/2023] [Accepted: 07/24/2023] [Indexed: 10/11/2023] Open
Abstract
Inflammatory bowel disease (IBD) is a complex condition resulting from environmental, microbial, immunologic, and genetic factors. With the advancement of Mendelian randomization research in IBD, we have gained new insights into the relationship between these factors and IBD. Many animal models of IBD have been developed using different methods, but few studies have attempted to model IBD by combining environmental factors and microbial factors. In this review, we examine how environmental factors and microbial factors affect the development and progression of IBD, and how they interact with each other and with the intestinal microbiota. We also summarize the current methods for creating animal models of IBD and compare their advantages and disadvantages. Based on the latest findings from Mendelian randomization studies on the role of environmental factors in IBD, we discuss which environmental and microbial factors could be used to construct a more realistic and reliable IBD experimental model. We propose that animal models of IBD should consider both environmental and microbial factors to better mimic human IBD pathogenesis and to reveal the underlying mechanisms of IBD at the immune and genetic levels. We highlight the importance of environmental and microbial factors in IBD pathogenesis and offer new perspectives and suggestions for improving experimental animal modeling. Our goal is to create a model that closely resembles the clinical picture of IBD.
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Affiliation(s)
- Zesheng Lin
- The First Clinical Medical School, Southern Medical University, Guangzhou, China
| | - Wenjing Luo
- The Second Clinical Medical School, Southern Medical University, Guangzhou, China
| | - Kaijun Zhang
- Department of Gastroenterology, Guangdong Provincial Geriatrics Institute, Guangzhou, ChinaNational Key Clinical Specialty, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
| | - Shixue Dai
- Department of Gastroenterology, Guangdong Provincial Geriatrics Institute, Guangzhou, ChinaNational Key Clinical Specialty, Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Guangzhou, China
- Department of Gastroenterology, Geriatric Center, National Regional Medical Center, Ganzhou Hospital Affiliated to Guangdong Provincial People's Hospital (Guangdong Academy of Medical Sciences), Southern Medical University, Ganzhou, China
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4
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Georgiou AN, Voskarides K, Zanos P, Chatzittofis A. Investigating the shared genetic basis and causal relationships between mucosa-associated lymphoid tissue inflammation and psychiatric disorders. Front Psychiatry 2024; 15:1379922. [PMID: 38742127 PMCID: PMC11089192 DOI: 10.3389/fpsyt.2024.1379922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Accepted: 04/09/2024] [Indexed: 05/16/2024] Open
Abstract
Background Chronic and acute inflammation of the mucosa-associated lymphoid tissue have been positively linked to the development of psychiatric disorders in observational studies. However, it remains unclear whether this association is causal. In the present study, we investigated this association, using as proxies genetically predicted tonsillectomy, appendectomy and appendicitis on psychiatric disorders including major depressive disorder (MDD), schizophrenia (SCZ), bipolar depression (BD) and anxiety (ANX) via a two-sample Mendelian randomization (MR) analysis. Methods Genetic association summary statistics for tonsillectomy, appendectomy and appendicitis were sourced from FinnGen Consortium, comprising data from 342,000 participants. Genetic correlations between all exposures and outcome were calculated with Linkage Disequilibrium Score (LDSC) Regression analysis. MR estimates were then calculated to assess their impact on the risk of developing psychiatric disorders. Sensitivity analysis was employed to test for any directional pleiotropy. Results Our results suggest that there is no direct causal association between tonsillectomy, appendectomy or appendicitis with a heightened risk for development of psychiatric disorders. The robustness of the results of the main MR analysis was further confirmed with additional sensitivity analyses. However, a moderate inverse genetic correlation was observed between tonsillectomy and MDD traits (rg=-0.39, p-value (P)=7.5x10-5). Conclusion Our findings provide, for the first time, evidence that there is no causal association between tonsillectomy or appendectomy on subsequent vulnerability of developing psychiatric disorders. Future studies using larger sample size GWAS should focus on unraveling the confounding factors and mediators to investigate this relationship further.
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Affiliation(s)
| | - Konstantinos Voskarides
- Department of Basic and Clinical Sciences, University of Nicosia Medical School, Nicosia, Cyprus
- School of Veterinary Medicine, University of Nicosia, Nicosia, Cyprus
| | - Panos Zanos
- Department of Psychology, University of Cyprus, Nicosia, Cyprus
| | - Andreas Chatzittofis
- Medical School, University of Cyprus, Nicosia, Cyprus
- Department of Clinical Sciences/Psychiatry, Umeå University, Umeå, Sweden
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5
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Park SJ, Lee SY, Jung HJ, Park MW, Choi HG, Kim H, Wee JH. Association between Tonsillectomy and Cardiovascular Diseases in Adults. J Pers Med 2023; 14:16. [PMID: 38276231 PMCID: PMC10817544 DOI: 10.3390/jpm14010016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 12/14/2023] [Accepted: 12/19/2023] [Indexed: 01/27/2024] Open
Abstract
This study aimed to evaluate the association between tonsillectomy and cardiovascular diseases (CVDs) in the Korean adult population. Using data from the 2002-2015 Korean National Health Insurance Service-Health Screening Cohort, a total of 1082 participants aged 40 years or older who had undergone tonsillectomy were matched with 4328 control individuals for age, sex, income, and region of residence. We evaluated the incidence of CVDs in both the tonsillectomy and control groups and calculated the hazard ratios (HRs) of stroke, ischemic heart disease (IHD), and heart failure (HF) for participants who underwent tonsillectomy using a stratified Cox proportional hazard model. The incidence rates of stroke (81.3 vs. 46.6 per 10,000 person-years) and IHD (112.3 vs. 64.9 per 10,000 person-years) were significantly higher in patients who had undergone tonsillectomy than in the control group. After adjustment, the tonsillectomy group exhibited a 1.78-fold and 1.60-fold higher occurrence of stroke (CI = 1.32-2.42, p < 0.001) and IHD (CI = 1.24-2.08, p < 0.001), respectively, compared to the control group. However, there was no significant difference in the incidence rate of tonsillectomy and control groups (11.1 vs. 6.1 per 10,000 person-years). The HR of HF did not differ significantly between the tonsillectomy and control groups in the adjusted model (p = 0.513). We identified a significant relationship between a history of tonsillectomy and occurrence of stroke/IHD in the Korean adult population.
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Affiliation(s)
- Sung Joon Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Chung-Ang University Gwangmyeong Hospital, Chung-Ang University College of Medicine, Gwangmyeong 14353, Republic of Korea;
| | - Sei Young Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul 06973, Republic of Korea;
| | - Hahn Jin Jung
- Department of Otorhinolaryngology-Head and Neck Surgery, Chungbuk National University Hospital, Chungbuk National University College of Medicine, Cheongju 28644, Republic of Korea;
| | - Min Woo Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Kangdong Sacred Heart Hospital, Seoul 05355, Republic of Korea;
| | - Hyo Geun Choi
- Department of Otorhinolaryngology-Head and Neck Surgery, Mdanalytics, Suseoseoulent Clinic, Seoul 06349, Republic of Korea;
| | - Heejin Kim
- Department of Otorhinolaryngology-Head and Neck Surgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea;
| | - Jee Hye Wee
- Department of Otorhinolaryngology-Head and Neck Surgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea;
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6
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Singh N, Bernstein CN. Environmental risk factors for inflammatory bowel disease. United European Gastroenterol J 2022; 10:1047-1053. [PMID: 36262056 PMCID: PMC9752273 DOI: 10.1002/ueg2.12319] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 09/17/2022] [Indexed: 01/13/2023] Open
Abstract
Inflammatory bowel disease (IBD) is a chronic, progressive immune-mediated inflammatory condition of the gastrointestinal tract. Environmental risk factors play a role in developing either type of IBD, Crohn's disease and ulcerative colitis; although the exact mechanism is still unknown. Herein, we review environmental risks from early life exposures, lifestyle and hygiene, vaccinations, surgeries, exposure to drugs and gastrointestinal pathogens that may increase the risk of developing IBD.
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Affiliation(s)
- Noreen Singh
- Department of Internal MedicineMax Rady College of MedicineRady Faculty of MedicineUniversity of ManitobaWinnipegManitobaCanada
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7
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Hasosah M, Alhashmi W, Abualsaud R, Alamoudi A, Aljawad A, Tunkar M, Felemban N, Basalim A, Khan M, Alanazi A, Almehaidib A. Environmental Risk Factors for Childhood Inflammatory Bowel Diseases: A Multicenter Case-Control Study. CHILDREN (BASEL, SWITZERLAND) 2022; 9:children9030438. [PMID: 35327810 PMCID: PMC8947646 DOI: 10.3390/children9030438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 02/13/2022] [Accepted: 02/21/2022] [Indexed: 12/07/2022]
Abstract
Objective: Multiple environmental factors can be linked to the development of inflammatory bowel disease (IBD).With an increase in the cases of IBD, the objective of this research is to investigate environmental risk factors for IBD in the Saudi population. Methods: A retrospective multicenter case−control study was performed among IBD children from 2009 to 2021.The variables analyzed to be the possible risk factors included their socioeconomic status, living and demographic characteristics, and lifestyle related to IBD. The questionnaire included a list of IBD risk factors that was given to the control and the patient group. For every variable, the 95% confidence interval (CI) and odds rations were also estimated. Results: There were 335 individuals considered in this study: 168 controls (50.1%) and 167 IBD patients (49.9%). Of these, 93 IBD patients (56%) had CD and 74 patients (44%) had UC. Most of participants were female (72.1%) and were aged above 10 years (51.5%). Vaginal delivery (OR 0.551, 95% CI: 1.59−4.14), age above 10 years (OR 1.040, 95% CI: 1.012−1.069), deficient fruit intake (OR 2.572, 95% CI: 1.59−4.14), no exposure to antibiotics (OR 2.396, 95% CI: 1.51−3.81), appendectomy (OR 2.098, 95% CI: 1.87−2.35), less physical activity (OR 2.033, 95% CI: 1.05−3.93) and gastroenteritis admissions > 2 times/year (OR 0.107, 95% CI: 0.037−0.311) were the risk factors for IBD. These factors depicted a more significant link with CD than UC (p < 0.05). Interestingly, sleep disturbance was estimated to be a CD risk factor (adjusted OR: 3.291, 95% CI = 0.97−11.22). Pets in house was risk factor for UC (p < 0.001). Conclusions: This study highlights association between vaginal delivery, age above 10 years, deficient fruit intake, low physical activity, exposure to antibiotics, appendectomy, and frequent gastroenteritis admissions as risk factors for IBD. Knowledge of these risk factors can help pediatricians to prospectively identify patients at risk of environmental exposure.
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Affiliation(s)
- Mohammed Hasosah
- Pediatric Gastroenterology Department, King Saud bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center (KAIMRC), National Guard Hospital, Jeddah 11481, Saudi Arabia;
- Correspondence:
| | - Wafaa Alhashmi
- College of Medicine, King Abdulaziz University, Jeddah 11481, Saudi Arabia; (W.A.); (R.A.)
| | - Renad Abualsaud
- College of Medicine, King Abdulaziz University, Jeddah 11481, Saudi Arabia; (W.A.); (R.A.)
| | - Anas Alamoudi
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah 11481, Saudi Arabia; (A.A.); (M.T.); (N.F.); (A.B.); (M.K.)
| | - Afnan Aljawad
- Department of Pediatric Gastroenterology, King Faisal Specialist Hospital & Research Center, Riyad 11211, Saudi Arabia; (A.A.); (A.A.)
| | - Mariam Tunkar
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah 11481, Saudi Arabia; (A.A.); (M.T.); (N.F.); (A.B.); (M.K.)
| | - Nooran Felemban
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah 11481, Saudi Arabia; (A.A.); (M.T.); (N.F.); (A.B.); (M.K.)
| | - Ahmed Basalim
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah 11481, Saudi Arabia; (A.A.); (M.T.); (N.F.); (A.B.); (M.K.)
| | - Muhammad Khan
- College of Medicine, King Saud bin Abdulaziz University for Health Sciences, Jeddah 11481, Saudi Arabia; (A.A.); (M.T.); (N.F.); (A.B.); (M.K.)
| | - Aziz Alanazi
- Pediatric Gastroenterology Department, King Saud bin Abdulaziz University for Health Sciences, King Abdullah International Medical Research Center (KAIMRC), National Guard Hospital, Jeddah 11481, Saudi Arabia;
| | - Ali Almehaidib
- Department of Pediatric Gastroenterology, King Faisal Specialist Hospital & Research Center, Riyad 11211, Saudi Arabia; (A.A.); (A.A.)
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8
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Zhao M, Feng R, Ben-Horin S, Zhuang X, Tian Z, Li X, Ma R, Mao R, Qiu Y, Chen M. Systematic review with meta-analysis: environmental and dietary differences of inflammatory bowel disease in Eastern and Western populations. Aliment Pharmacol Ther 2022; 55:266-276. [PMID: 34820868 DOI: 10.1111/apt.16703] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/16/2021] [Accepted: 11/03/2021] [Indexed: 12/12/2022]
Abstract
BACKGROUND While the incidence of inflammatory bowel disease (IBD) has stabilised in the West, it is still increasing in several newly industrialised countries. AIMS To investigate whether the environmental and dietary risk factors for IBD differ between Eastern and Western populations METHODS: We systematically searched PubMed, Embase, and Web of Science for studies published from inception through June 30, 2020. Data were pooled using a random effects model. RESULTS Overall, 255 studies were assessed. We identified 25 risk factors for IBD, seven of which were noted in both Eastern and Western populations: family history of Crohn's disease [CD] or ulcerative colitis [UC], former smoking (CD/UC), smoking (CD), appendicectomy (CD), tonsillectomy (CD), meat and meat products (CD), and vitamin D deficiency (UC). The remaining factors, including urban living, current smoking, antibiotics, oral contraceptives, caesarean section, isotretinoin, total energy, fat, cholesterol, fatty acids and their sub-classifications, eggs, and soft drinks, were associated with an increased risk of IBD in Western or Eastern populations only. We identified 21 protective factors for IBD, among which eight were common in the East and West: farm animals (CD/UC), Helicobacter pylori infection (CD/UC), multiple births (CD), physical activity (CD), history of breastfeeding (CD), pets (UC), current smoking (UC), and coffee intake (UC). Ten factors conferred protection against IBD in Western populations only, whereas eight factors conferred protection against IBD in Eastern populations only. CONCLUSIONS Numerous environmental and dietary factors influenced the development of IBD in both Western and Eastern populations, whereas certain factors influenced IBD risk differently in these populations.
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Affiliation(s)
- Min Zhao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Rui Feng
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Shomron Ben-Horin
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
- Gastroenterology Department, Sheba Medical Center and Sackler School of Medicine, Tel-Aviv University, Tel Hashomer, Israel
| | - Xiaojun Zhuang
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Zhenyi Tian
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Xiaozhi Li
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Ruiqi Ma
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Ren Mao
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Yun Qiu
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Minhu Chen
- Department of Gastroenterology, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
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9
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Jeong J, Choi JK, Choi HS, Hong CE, Shin HA, Chang JH. The Associations of Tonsillectomy with Adenoidectomy with Pneumonia and Appendicitis Based on National Sample Cohort Data from the Korean National Health Insurance Service. Int Arch Otorhinolaryngol 2021; 25:e545-e550. [PMID: 34737825 PMCID: PMC8558963 DOI: 10.1055/s-0040-1722159] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Accepted: 10/12/2020] [Indexed: 12/14/2022] Open
Abstract
Introduction
The association between tonsillectomy with adenoidectomy (T&A) with appendicitis is controversial, and the association of T&A with pneumonia has not been investigated.
Objective
To investigate the associations of T&A with pneumonia and appendicitis using data from the Korean National Health Insurance Service National Sample Cohort.
Methods
We selected patients between the ages of 3 and 10 years who had undergone T&A in 2005 and were monitored since the performance of the T&A until 2013. The control group was established to have similar propensities for demographic characteristics compared to the T&A group. For eight years after the T&A, the number of patients with a diagnosis of pneumonia, patients who were admitted due to pneumonia, and those who underwent appendectomy were analyzed. The risk factors for pneumonia and appendectomy were analyzed.
Results
The number of pneumonia diagnoses was significantly higher in the T&A group than in the control group (
p
= 0.023), but there were no significant differences in the number of admissions due to pneumonia between the 2 groups (
p
= 0.155). Younger age and T&A were significant risk factors for the development of pneumonia. There were no significant differences in the number of appendectomies between the T&A and the control groups (
p
= 0.425), neither were there significant risk factors for appendectomy.
Conclusion
Tonsillectomy with adenoidectomy was associated with an increase in pneumonia diagnoses, but it was not associated with the number of appendectomies. The associations of T&A with pneumonia and appendicitis were analyzed in this population-based study.
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Affiliation(s)
- Junhui Jeong
- Department of Otorhinolaryngology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Jung Kyu Choi
- Department of Policy Research Affairs, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Hyun Seung Choi
- Department of Otorhinolaryngology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Chang Eui Hong
- Department of Otorhinolaryngology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Hyang Ae Shin
- Department of Otorhinolaryngology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Jung Hyun Chang
- Department of Otorhinolaryngology, National Health Insurance Service Ilsan Hospital, Goyang, Korea
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10
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Ma KSK, Wu MC, Thota E, Wang YH, Alqaderi H, Wei JCC. Tonsillectomy as a risk factor of periodontitis: a population-based cohort study. J Periodontol 2021; 93:721-731. [PMID: 34710237 DOI: 10.1002/jper.21-0215] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 09/28/2021] [Accepted: 10/19/2021] [Indexed: 11/07/2022]
Abstract
AIM To determine whether patients who had undergone tonsillectomy would have higher risks of postoperative periodontitis. METHODS Data were collected from the Taiwan Longitudinal Health Insurance Dataset from 1999 to 2013, a population-based cohort study consisting of cases of newly-onset sleep apnoea, chronic diseases of tonsils and adenoids, peritonsillar abscess, and periodontal diseases. 1,482 tonsillectomy cases and 14,796 non-tonsillectomy controls were selected. Propensity score matching between the tonsillectomy group and the non-tonsillectomy group was conducted to exclude the confounding effect resulting from indications of tonsillectomy. Cox proportional hazard model and subgroup analyses were conducted to identify subpopulations at risk of tonsillectomy-associated periodontitis, and a sub-outcome analysis was applied to identify the subtype of tonsillectomy-associated periodontitis. RESULTS A total of 648 patients who had undergone tonsillectomy and 648 out of 6,509 propensity score-matched controls were retrieved, among which 230 cases in the tonsillectomy group were associated with post-surgical periodontitis (adjusted HR = 1.31, 95% CI = 1.08-1.59). The association persisted in a subpopulation of patients with periodontitis who received mechanical and surgical treatments for periodontitis (adjusted HR = 1.33, 95% CI = 1.09-1.63). The incidence of periodontitis was significantly high in the individuals who underwent tonsillectomy and was particularly high in those that were below 12 years of age (HR = 1.58, 95% CI = 1.10-2.27). The risk of periodontitis increased 4 years after tonsillectomy (HR = 1.82; 95% CI = 1.29-2.59). The majority of post-tonsillectomy periodontitis was aggressive and acute periodontitis (HR = 1.37; 95% CI = 1.10 - 1.71). CONCLUSIONS Tonsillectomy performed in paediatric patients of less than 12 years old, increased the risk of developing periodontitis. Aggressive and acute periodontitis as a long-term, postoperative adverse event took place at 4 years or longer after tonsillectomy. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Kevin Sheng-Kai Ma
- Center for Global Health, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.,Graduate Institute of Biomedical Electronics and Bioinformatics, College of Electrical Engineering and Computer Science, National Taiwan University, Taipei, Taiwan.,Department of Dentistry, Chung Shan Medical University and Chung Shan Medical, University Hospital, Taichung, Taiwan
| | - Meng-Che Wu
- Division of Gastroenterology, Children's Medical Center, Taichung Veterans General Hospital, Taichung, Taiwan.,Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Eshwar Thota
- Department of Dentistry, Chung Shan Medical University and Chung Shan Medical, University Hospital, Taichung, Taiwan
| | - Yu-Hsun Wang
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Hend Alqaderi
- Department of Oral Health Policy and Epidemiology, Harvard School of Dental Medicine, Boston, MA, USA.,The Forsyth Institute, Cambridge, MA, USA.,Dasman Diabetes Institute, Kuwait
| | - James Cheng-Chung Wei
- Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine Chung Shan Medical University Hospital, Taichung, Taiwan.,Clinical Trial Research Center, China Medical University Hospital, Taichung, Taiwan.,Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
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11
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New Evidence for Artemisia absinthium L. Application in Gastrointestinal Ailments: Ethnopharmacology, Antimicrobial Capacity, Cytotoxicity, and Phenolic Profile. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:9961089. [PMID: 34335850 PMCID: PMC8324356 DOI: 10.1155/2021/9961089] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/13/2021] [Accepted: 07/16/2021] [Indexed: 12/29/2022]
Abstract
Artemisia absinthium L. (Asteraceae) is traditionally used for gastrointestinal ailments and disorders linked to numerous risk factors including microbial infections. We aimed to provide contemporary evidence for its ethnopharmacological use and determine its antimicrobial capacity and mode of action, cytotoxicity, and phenolic constituents. Ethnopharmacological survey was conducted using semistructured interviews. Antimicrobial and antibiofilm capacities were determined by microdilution/crystal violet assay, respectively. Modes of action tested include estimation of exopolysaccharide production (congo red binding assay) and interference with membrane integrity (crystal violet uptake and nucleotide leakage assay). Cytotoxicity was determined using crystal violet assay. Polyphenolic profiling was done by advanced liquid chromatography/mass spectrometry (UHPLC-LTQ OrbiTrap MS). Artemisia absinthium in Serbia is traditionally used for gastrointestinal disorders, among others. Further study revealed high antifungal capacity of herb ethanolic extract towards range of Candida species (MIC 0.5–1 mg/mL) along with promising antibacterial activities (MIC 0.25–4 mg/mL). Interference with membrane integrity could be observed as a possible antimicrobial mechanism. Antibiofilm potential can be considered as high (towards C. krusei) to limited (towards P. aeruginosa) and moderate based on reduction in exopolysaccharide content. In concentrations up to 400 µg/mL, no cytotoxicity was observed towards HaCaT and HGF-1 cell lines. Polyphenolic analysis revealed twenty-one different constituents. A. absinthium usage as a gastrointestinal ailment remedy has been confirmed in vitro by its antimicrobial capacity towards microorganisms whose presence is linked to the diseases and associated complications and noncytotoxic nature of the natural product. The observed activities could be attributed to the present phenolic compounds.
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12
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Suzuki Y, Monteiro RC, Coppo R, Suzuki H. The Phenotypic Difference of IgA Nephropathy and its Race/Gender-dependent Molecular Mechanisms. KIDNEY360 2021; 2:1339-1348. [PMID: 35369654 PMCID: PMC8676395 DOI: 10.34067/kid.0002972021] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 05/24/2021] [Indexed: 02/08/2023]
Abstract
IgA nephropathy (IgAn), defined by the pre dominant de position of IgA in the glomerular mesangium, is the most common form of GN throughout the world. However, its incidence, sex distribution, clinical presentation, and progression and pathogenic initiating factors are largely variable and do not fit such a simple definition. To assess the heterogeneity of this disease, we recently conducted a clinical survey on the presentation and clinical management of patients with IgAn in Europe and Japan. This clinical survey highlights similarities and differences in patients from different cont inents. The survey revealed obvious differences between nations in the frequency of gastrointestinal complications, including inflammatory bowel diseases (IBD) and celiac disease, which were more frequent in European patients. Such findings are compatible with susceptibility loci related to intestinal immunity and IBD in recent genome wide association studies (GWAS) on IgAn. However, most of the molecules in these mucosal-related loci fulfill the immunologic function not only of gut-associated lymphoid tissue (GALT), but also nasopharyngeal/bronchial-associated lymphoid tissues (NALT/BALT). Indeed, a similar frequency of macrohematuria coinciding with upper respiratory infection, a hallmark manifestation of this disease, was found in the survey, emphasizing the pathogenic roles of these molecules in the NALT/BALT of patients with IgAn. Recent experimental and clinical studies including GWAS on multiple common infections and IBD indicate immune crosstalk between GALT and NALT/BALT, and some related mediators, such as TNF superfamily ligands (APRIL/BAFF). This review explains the epidemiologic heterogeneity of this disease with the clinical survey, and discusses race and sex-dependent molecular mechanisms.
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Affiliation(s)
- Yusuke Suzuki
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Renato C. Monteiro
- Faculty of Medicine, University of Paris, Paris, France,Center for Research on Inflammation, Paris, France,Inflamex Laboratory of Excellence, Paris, France,Immunology Department, Bichat Hospital, Assistance Publique de Paris, Paris, France
| | | | - Hitoshi Suzuki
- Department of Nephrology, Juntendo University Faculty of Medicine, Tokyo, Japan
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13
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van der Sloot KWJ, Weersma RK, Alizadeh BZ, Dijkstra G. Identification of Environmental Risk Factors Associated With the Development of Inflammatory Bowel Disease. J Crohns Colitis 2020; 14:1662-1671. [PMID: 32572465 DOI: 10.1093/ecco-jcc/jjaa114] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND AIMS Multiple genetic and environmental factors are involved in the aetiology of inflammatory bowel disease [IBD] including Crohn's disease [CD] and ulcerative colitis [UC], but data on these exposome factors are difficult to identify. Several exposome factors such as smoking have been shown to be involved; as for other environmental factors, eg stress, results have been conflicting. METHODS We performed a case-control study including 674 IBD patients of the 1000IBD cohort, frequency-matched based on sex and age with 1348 controls from the population-based Lifelines Cohort Study. Exposome data were obtained using the validated Groningen IBD Environmental Questionnaire [GIEQ], capturing exposome factors through different stages of life using 844 items, of which 454 were applicable to study the role of 93 exposome factors in disease aetiology. Logistic regression [LR] modelling with Bonferroni correction for multiple testing was applied to estimate the multivariable-adjusted effect of each exposome factor. RESULTS For IBD, we identified four novel factors: stressful life events (CD odds ratio [OR] 2.61/UC OR 2.92), high perceived stress [2.29/2.67], alcohol use [0.40/0.43], and bronchial hyper-reactivity [3.04/2.36]. Four novel factors were associated with only CD: prenatal smoke exposure [1.89], having a bed partner [0.53], allergies [2.66], and cow's milk hypersensitivity [5.87]; and two solely with UC: carpet flooring [0.57] and neuroticism [1.32]. Nine factors were replicated. CONCLUSIONS In this study we identified 10 novel, and replicated nine previously reported, exposome factors associated with IBD. Identifying these factors is important for both understanding disease aetiology and future prevention strategies to decrease the development of IBD in genetically susceptible persons.
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Affiliation(s)
- Kimberley W J van der Sloot
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands.,Department of Epidemiology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Rinse K Weersma
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Behrooz Z Alizadeh
- Department of Epidemiology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
| | - Gerard Dijkstra
- Department of Gastroenterology and Hepatology, University of Groningen and University Medical Center Groningen, Groningen, The Netherlands
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14
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Choi DH, Park J, Choi JK, Lee KE, Lee WH, Yang J, Lee JY, Park YJ, Oh C, Won HR, Koo BS, Chang JW, Park YS. Association between the microbiomes of tonsil and saliva samples isolated from pediatric patients subjected to tonsillectomy for the treatment of tonsillar hyperplasia. Exp Mol Med 2020; 52:1564-1573. [PMID: 32887934 PMCID: PMC8080726 DOI: 10.1038/s12276-020-00487-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/17/2020] [Accepted: 07/07/2020] [Indexed: 12/20/2022] Open
Abstract
Oral microbes have the capacity to spread throughout the gastrointestinal system and are strongly associated with multiple diseases. Given that tonsils are located between the oral cavity and the laryngopharynx at the gateway of the alimentary and respiratory tracts, tonsillar tissue may also be affected by microbiota from both the oral cavity (saliva) and the alimentary tract. Here, we analyzed the distribution and association of the microbial communities in the saliva and tonsils of Korean children subjected to tonsillectomy because of tonsil hyperplasia (n = 29). The microbiome profiles of saliva and tonsils were established via 16S rRNA gene sequencing. Based on the alpha diversity indices, the microbial communities of the two groups showed high similarities. According to Spearman’s ranking correlation analysis, the distribution of Treponema, the causative bacterium of periodontitis, in saliva and tonsils was found to have a significant positive correlation. Two representative microbes, Prevotella in saliva and Alloprevotella in tonsils, were negatively correlated, while Treponema 2 showed a strong positive correlation between saliva and tonsils. Taken together, strong similarities in the microbial communities of the tonsils and saliva are evident in terms of diversity and composition. The saliva microbiome is expected to significantly affect the tonsil microbiome. Furthermore, we suggest that our study creates an opportunity for tonsillar microbiome research to facilitate the development of novel microbiome-based therapeutic strategies. Analysing the microbes on tonsils and in saliva from the mouths of children in South Korea provides comparisons of the microbial populations in these distinct but nearby regions, offering possible guidance for developing new therapies for various oral diseases. Researchers in South Korea led by Yoon Shin Park at Chungbuk National University, Cheongju, and Jae Won Chang at Chungnam National University, Daejeon, examined surgically removed tonsils from 29 patients, together with samples of the patients’ saliva. They identified many specific microbe types, finding broad similarities between the populations of an individual’s tonsils and saliva. They also identified positive and negative correlations between the presence of specific microbes in the two populations. The results could guide future treatment choices, including the use of microbes to treat disease.
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Affiliation(s)
- Da Hyeon Choi
- Department of Microbiology, School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Jiwon Park
- Department of Microbiology, School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Ju Kwang Choi
- Department of Microbiology, School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Kyeong Eun Lee
- Department of Microbiology, School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, 28644, Republic of Korea
| | - Won Hee Lee
- Institute of MD Healthcare Inc, Seoul, 03923, Republic of Korea
| | - Jinho Yang
- Institute of MD Healthcare Inc, Seoul, 03923, Republic of Korea
| | - Ju Yeon Lee
- Central Research Institute, Nano Intelligent Biomedical Engineering Corporation (NIBEC), School of Dentistry, Seoul National University, Seoul, 03080, Republic of Korea
| | - Yoon Jeong Park
- Central Research Institute, Nano Intelligent Biomedical Engineering Corporation (NIBEC), School of Dentistry, Seoul National University, Seoul, 03080, Republic of Korea.,Department of Dental Regenerative Bioengineering and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, 03080, Republic of Korea
| | - Chan Oh
- Department of Otolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea
| | - Ho-Ryun Won
- Department of Otolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea
| | - Bon Seok Koo
- Department of Otolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea
| | - Jae Won Chang
- Department of Otolaryngology-Head and Neck Surgery, Chungnam National University College of Medicine, Daejeon, 35015, Republic of Korea.
| | - Yoon Shin Park
- Department of Microbiology, School of Biological Sciences, College of Natural Sciences, Chungbuk National University, Cheongju, 28644, Republic of Korea.
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15
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Wu MC, Ma KSK, Wang YH, Wei JCC. Impact of tonsillectomy on irritable bowel syndrome: A nationwide population-based cohort study. PLoS One 2020; 15:e0238242. [PMID: 32870916 PMCID: PMC7462273 DOI: 10.1371/journal.pone.0238242] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 08/12/2020] [Indexed: 12/12/2022] Open
Abstract
Tonsillectomy is a commonly performed surgical procedure worldwide; however, the possible long-term consequences have not been fully explored. The tonsils are secondary lymphoid tissue providing a defensive barrier against pathogens. There are few data in the literature on the relationship between prior tonsillectomy and the risk of irritable bowel syndrome (IBS). The aim of this study was to evaluate the risk of developing IBS in patients who underwent tonsillectomy using a nationwide longitudinal population-based cohort. We identified 1300 patients with tonsillectomy and 2600 matched controls from the Longitudinal Health Insurance Research Database of the National Health Insurance Research Database in Taiwan. Propensity score analysis was used for matching age, gender, comorbidities, medications, and index year at a ratio of 1:2. Multiple Cox regression analysis was used to estimate the adjusted hazard ratio of IBS. Furthermore, sensitivity tests and a stratified analysis were conducted. The incidence of IBS was 3 per 1,000 person-years in tonsillectomy patients, which was higher than the rate of 1.8 per 1,000 person-years found in non-tonsillectomy patients. After adjustment for patients’ age, gender, comorbidities, and medications, patients who underwent tonsillectomy had a 1.84-fold risk of developing IBS compared to those without tonsillectomy (adjusted hazard ratio [HR]:1.84; 95% CI, 1.09–3.09). Stratified analysis revealed that a higher adjusted HR of 3.79 (95% CI, 1.35–10.64) in patients ≥50 years old, and there was a marginally significantly higher adjusted HR of 1.98 (95% CI, 0.99–3.95) of developing IBS when the follow-up period was longer than 3 years. Tonsillectomy was associated with a higher risk of developing IBS. Physicians should provide appropriate monitoring of IBS in patients undergoing tonsillectomy.
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Affiliation(s)
- Meng-Che Wu
- Division of Gastroenterology, Children’s Medical Center, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Kevin Sheng-Kai Ma
- Department of Dentistry, Chung Shan Medical University, Taichung, Taiwan
- Department of Life Science, National Taiwan University, Taipei, Taiwan
| | - Yu-Hsun Wang
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - James Cheng-Chung Wei
- Department of Rheumatology, BenQ Medical Center, The Affiliated BenQ Hospital of Nanjing Medical University, Nanjing, China
- Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China
- Division of Allergy, Immunology and Rheumatology, Chung Shan Medical University Hospital, Taichung, Taiwan
- Institute of Medicine, College of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan
- * E-mail:
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16
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Garman KS, Ajayi TA, Boutte HJ, Chiu ST, von Furstenberg RJ, Lloyd BR, Zhang C, Onaitis MW, Chow SC, McCall SJ. Prior tonsillectomy is associated with an increased risk of esophageal adenocarcinoma. PLoS One 2020; 15:e0235906. [PMID: 32697782 PMCID: PMC7375530 DOI: 10.1371/journal.pone.0235906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 06/03/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Esophageal cancer is a deadly cancer with 5-year survival <20%. Although multiple risk factors for esophageal adenocarcinoma (EAC) including obesity, GERD and smoking have been identified, these risk factors do not fully explain the rising incidence of EAC. In this study, we evaluated the association between prior history of tonsillectomy and EAC. Our goal was to determine whether tonsillectomies were more frequent in patients with EAC (cases) than in our thoracic surgery controls. METHODS Cases included 452 esophagectomy cases, including 396 with EAC and 56 who underwent esophagectomy for Barrett's esophagus (BE) with high grade dysplasia (HGD). 1,102 thoracic surgery patients with surgical indications other than dysplastic BE or esophageal cancer represented the controls for our analysis. The association of tonsillectomy and HGD/EAC were primarily evaluated by using univariate tests and then verified by logistic regression analysis. Baseline demographics, medical history, and thoracic surgery controls were compared by using χ2 tests or 95% CIs. Significant risk factors were considered as covariates in the multivariate models while evaluating the association between tonsillectomy and HGD/EAC. P-values or odds ratios were estimated with 95% confidence limits to identify significances which was more appropriate. RESULTS Tonsillectomy was more common in cases than controls and was found to have a significant association with esophageal cancer (19.9% vs. 12.7%; p-value = 0.0003). This significant association persisted after controlling for other known risk factors/covariates. CONCLUSION A prior history of tonsillectomy was significantly associated with HGD/EAC and may represent an independent risk factor for the development of EAC. However, the underlying biology driving this association remains unclear.
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Affiliation(s)
- Katherine S. Garman
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Teminioluwa A. Ajayi
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Harold J. Boutte
- Division of Gastroenterology, Department of Medicine, Northwestern Medicine, Chicago, Illinois, United States of America
| | - Shih-Ting Chiu
- Providence Health and Services, Portland, Oregon, United States of America
| | - Richard J. von Furstenberg
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Benjamin R. Lloyd
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Cecelia Zhang
- Division of Gastroenterology, Department of Medicine, Duke University, Durham, North Carolina, United States of America
| | - Mark W. Onaitis
- Division of Cardiovascular and Thoracic Surgery, Department of Surgery, University of California San Diego, La Jolla, California, United States of America
| | - Shein-Chung Chow
- Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina, United States of America
| | - Shannon J. McCall
- Department of Pathology, Duke University, Durham, North Carolina, United States of America
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Abdel-Naby Awad OG. Echinacea can help with Azithromycin in prevention of recurrent tonsillitis in children. Am J Otolaryngol 2020; 41:102344. [PMID: 32487336 PMCID: PMC7132457 DOI: 10.1016/j.amjoto.2019.102344] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/09/2019] [Accepted: 11/12/2019] [Indexed: 01/04/2023]
Abstract
PURPOSE Recurrent tonsillitis in children is a common disease affecting children quality of life and extends to their families. The aim of this study was to assess the effect of combined use of oral Azithromycin (AZT) plus Echinacea compared to exclusive use of AZT in children with recurrent tonsillitis. MATERIAL AND METHODS A prospective comparative study including three groups of children with recurrent tonsillitis. Group 1: (100 patients) had no prophylactic treatment. Group 2 (100 patients) received [60 mg/kg] prophylactic dose of AZT divided as (10 mg/kg/day) over 6 consecutive days every month for 6 consecutive months. Group 3 (100 patients) received AZT as in group 2 plus commercially available Echinacea in a dose of 5 ml oral suspension; 3 times daily for 10 consecutive days every month for 6 consecutive months. Number of tonsillitis attacks and severity of tonsillitis symptoms were assessed and compared in different groups. RESULTS Group 2 and group 3 had significant less number of tonsillitis attacks and severity of assessed symptoms during 6 months of prophylactic treatment with significant better results in group 3 (i.e. AZT plus Echinacea) compared to group 2 (I.e. AZT alone). However; there was no significant difference in patients with any prophylaxis. CONCLUSION The combined use of Echinacea with Azithromycin produced favorable outcome than Azithromycin alone in pediatric patients with recurrent tonsillitis.
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Affiliation(s)
- Osama G Abdel-Naby Awad
- Otolaryngology, Head and Neck Department, Minia University Hospital, 122 Kornish El-Neel Street, Minia City, Minia, Egypt.
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18
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Liu B, Fang F, Ye W, Wirdefeldt K. Appendectomy, Tonsillectomy and Parkinson's Disease Risk: A Swedish Register-Based Study. Front Neurol 2020; 11:510. [PMID: 32595591 PMCID: PMC7292857 DOI: 10.3389/fneur.2020.00510] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 05/08/2020] [Indexed: 11/13/2022] Open
Abstract
Introduction: The gut-brain hypothesis proposes that Parkinson's disease (PD) pathology may start in the gut and later spread to the brain in a prion-like manner. As PD pathology is redundant in the appendix and tonsils, which are important gut-associated lymphoid tissues, we examined whether appendectomy and tonsillectomy were associated with later PD risk. Methods: The nested case-control study included 78,650 PD patients born in 1900-1980 and with a diagnosis of PD between 1964 and 2010. For each PD patient, we randomly selected 40 non-PD controls individually matched for sex and year of birth at the date of PD diagnosis. Appendectomy and tonsillectomy before PD diagnosis were ascertained from the Swedish Patient Register from 1964 onward. We calculated odds ratios (OR) with 95% confidence intervals (CI) using conditional logistic regression adjusting for country of birth, highest achieved education, COPD, comorbidity index, and number of hospital visits. Results: Overall, we found 16% lower risk of PD linked to previous appendectomy (OR = 0.84, 95% CI: 0.80-0.88) and 8% lower risk of PD linked to previous tonsillectomy, although not statistically significant (OR = 0.92, 95% CI: 0.81-1.04). A 7 and 15% lower risk of PD was also noted ≥20 years after appendectomy and tonsillectomy, respectively. Similar associations were observed for men and women but were stronger for PD diagnosed after age 60. Conclusion: Appendectomy and potentially also tonsillectomy were associated with a lower risk PD. A potential mechanism may involve surgical removal of alpha-synuclein redundancy in the appendix and tonsils.
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Affiliation(s)
- Bojing Liu
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Fang Fang
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Weimin Ye
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Karin Wirdefeldt
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
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19
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Piovani D, Danese S, Peyrin-Biroulet L, Nikolopoulos GK, Lytras T, Bonovas S. Environmental Risk Factors for Inflammatory Bowel Diseases: An Umbrella Review of Meta-analyses. Gastroenterology 2019; 157:647-659.e4. [PMID: 31014995 DOI: 10.1053/j.gastro.2019.04.016] [Citation(s) in RCA: 410] [Impact Index Per Article: 82.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS Multiple environmental factors have been associated with the development of inflammatory bowel diseases (IBDs). We performed an umbrella review of meta-analyses to summarize available epidemiologic evidence and assess its credibility. METHODS We systematically identified and appraised meta-analyses of observational studies examining environmental factors and risk of IBD (Crohn's disease [CD] or ulcerative colitis [UC]). For each meta-analysis, we considered the random effects estimate, its 95% confidence interval, the estimates of heterogeneity, and small-study effects, and we graded the evidence according to prespecified criteria. Methodologic quality was assessed with AMSTAR (ie, A Measurement Tool to Assess Systematic Reviews) 2. RESULTS We examined 183 estimates in 53 meta-analyses of 71 environmental factors related to lifestyles and hygiene, surgeries, drug exposures, diet, microorganisms, and vaccinations. We identified 9 factors that increase risk of IBD: smoking (CD), urban living (CD and IBD), appendectomy (CD), tonsillectomy (CD), antibiotic exposure (IBD), oral contraceptive use (IBD), consumption of soft drinks (UC), vitamin D deficiency (IBD), and non-Helicobacter pylori-like enterohepatic Helicobacter species (IBD). We identified 7 factors that reduce risk of IBD: physical activity (CD), breastfeeding (IBD), bed sharing (CD), tea consumption (UC), high levels of folate (IBD), high levels of vitamin D (CD), and H pylori infection (CD, UC, and IBD). Epidemiologic evidence for all of these associations was of high to moderate strength; we identified another 11 factors associated with increased risk and 16 factors associated with reduced risk with weak credibility. Methodologic quality varied considerably among meta-analyses. Several associations were based on findings from retrospective studies, so it is not possible to determine if these are effects of IBD or the results of recall bias. CONCLUSIONS In an umbrella review of meta-analyses, we found varying levels of evidence for associations of different environmental factors with risk of IBD. High-quality prospective studies with analyses of samples from patients with recent diagnoses of IBD are needed to determine whether these factors cause or are results of IBD and their pathogenic mechanisms.
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Affiliation(s)
- Daniele Piovani
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; Inflammatory Bowel Disease Center, Humanitas Clinical and Research Center-IRCCS, Milan, Italy
| | - Silvio Danese
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; Inflammatory Bowel Disease Center, Humanitas Clinical and Research Center-IRCCS, Milan, Italy
| | - Laurent Peyrin-Biroulet
- Department of Hepato-Gastroenterology and INSERM U954, University Hospital of Nancy, University of Lorraine, Vandoeuvre-lès-Nancy, France
| | | | - Theodore Lytras
- Hellenic Center for Disease Control and Prevention, Athens, Greece
| | - Stefanos Bonovas
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; Inflammatory Bowel Disease Center, Humanitas Clinical and Research Center-IRCCS, Milan, Italy.
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20
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Yamamoto-Furusho JK, Sarmiento-Aguilar A, Toledo-Mauriño JJ, Bozada-Gutiérrez KE, Bosques-Padilla FJ, Martínez-Vázquez MA, Marroquín-Jiménez V, García-Figueroa R, Jaramillo-Buendía C, Miranda-Cordero RM, Valenzuela-Pérez JA, Cortes-Aguilar Y, Jacobo-Karam JS, Bermudez-Villegas EF. Incidence and prevalence of inflammatory bowel disease in Mexico from a nationwide cohort study in a period of 15 years (2000-2017). Medicine (Baltimore) 2019; 98:e16291. [PMID: 31277162 PMCID: PMC6635231 DOI: 10.1097/md.0000000000016291] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Despite the worldwide increasing incidence and prevalence of Inflammatory Bowel Disease (IBD), our knowledge about it in Mexico is still limited. The aim of this study is to describe the incidence and prevalence of IBD as well as its clinical and socio-demographical characteristics in Mexico from a nation-wide perspective.Multicenter nation-wide cohort study that included 42 IBD clinics from all over the country that participated with electronically register of the new cases over 17 years as well as all known existing cases together with their clinical and socio-demographical characteristics from patients with IBD (ulcerative colitis [UC], Crohn disease [CD], and inflammatory bowel disease unclassified [IBDU]). The data collection was conducted between January and October 2017. Incidence, prevalence, and mean incidence over 2 decades were then calculated. Data base was analyzed using SPSS v24 program SPSS (version 24, IBM Corp., Armonk, NY, USA).A total of 2645 patients with IBD were registered. The crude incidence rates of IBD, UC, and CD, respectively, were 0.21, 0.16, and 0.04 cases per 100,000-person year. The highest incidence was registered in the year 2015, compared with to the previous years. The mean incidence of IBD has increased steadily from 0.05 to 0.21 per 100,000 person-years over the past 15 years (P = .06). The incidence of IBD new cases have increased significantly throughout the last 16 years, 5.9-fold for IBD, 5.3-fold for UC, and 9.5-fold for CD. The prevalence rates of IBD, UC, and CD, respectively, were 1.83, 1.45, and 0.34 cases per 100,000-person-year.This is the first study from a nation-wide perspective that demonstrated a significant increase of prevalence and incidence of IBD in Mexico in the last 15 years.
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Affiliation(s)
- Jesús K. Yamamoto-Furusho
- Inflammatory Bowel Disease Clinic, Department of Gastroenterology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán
| | - Andrea Sarmiento-Aguilar
- Inflammatory Bowel Disease Clinic, Department of Gastroenterology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán
| | - Joel J. Toledo-Mauriño
- Inflammatory Bowel Disease Clinic, Department of Gastroenterology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán
| | - Katya E. Bozada-Gutiérrez
- Inflammatory Bowel Disease Clinic, Department of Gastroenterology, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán
| | - Francisco J. Bosques-Padilla
- Inflammatory Bowel Disease Clinic, Department of Gastroenterology, Escuela Nacional de Medicina Sistema Tec Salud, Monterrey, Nuevo León
| | - Manuel A. Martínez-Vázquez
- Inflammatory Bowel Disease Clinic, Department of Gastroenterology, Escuela Nacional de Medicina Sistema Tec Salud, Monterrey, Nuevo León
| | - Virgilio Marroquín-Jiménez
- Gastroenterology Department, Hospital de Especialidades Centro Médico Nacional General Manuel Avila Camacho IMSS Puebla, Puebla
| | - Rosalva García-Figueroa
- Division of Gastroenterology and Endoscopy, Hospital de Alta Especialidad ISSSTE of Morelia, Michoacán, Morelia
| | | | - Rosa M. Miranda-Cordero
- Inflammatory Bowel Disease Clinic, Division of Gastroenterology, Centro Médico ISSEMyM, Toluca, Estado de México
| | - Jesús A. Valenzuela-Pérez
- Colon and Rectum Surgery Department, Hospital Civil de Guadalajara “Dr. Juan I. Menchaca”, Guadalajara
| | | | - Janett S. Jacobo-Karam
- Gastroenterology and Endoscopy Department, Doctor in Medical Sciences, Hospital General 450 Secretaría de Salud, Durango, Durango
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21
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Cury DB, Oliveira R, Cury MS. Inflammatory bowel diseases: time of diagnosis, environmental factors, clinical course, and management - a follow-up study in a private inflammatory bowel disease center (2003-2017). J Inflamm Res 2019; 12:127-135. [PMID: 31213873 PMCID: PMC6543909 DOI: 10.2147/jir.s190929] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The governmental program of Brazilian Unified National Health System has already published studies on the incidence of inflammatory bowel diseases (IBD), but up until now, there have been no epidemiological studies in private centers in Brazil. However, these diseases tend to affect people from a higher socioeconomic class, mainly in the capital of MS state that has the third highest GDP in Brazil. OBJECTIVES The aim was to analyze an observational, descriptive study of an IBD database in a private center including: the side, behavior of the disease and medical management, the association of extra-intestinal manifestations, and the main clinical symptoms which led to the investigation and diagnosis of IBD. PATIENTS AND METHODS A cohort study was developed in which data of all patients with IBD were analyzed with SPSS software in a constructed electronic database. RESULTS Of 329 patients, 212 (64.4%) had Crohn's disease (CD) and 117 (35.6%) had ulcerative colitis (UC). Average age at diagnosis of CD was 36.19 (±14.33) and of UC was 41.61 (±15.37). An amount of 50.05% of the patients with CD and 72.7% (P<0.001) with UC were female. We have observed that concerning the first symptoms, diahrrea and blood feces corresponded to 70% in UC while in CD 50% of the patients presented diahrrea with blood feces, loss of weight corresponded to 50% and only diahrrea 25%. (P<0.001). Anti-TNFs corresponded to 56.2% being more frequent in CD 0.001%. CD patients used biologic therapy and antibiotics more frequently than those with UC. In conclusion, IBD is also frequent in private health care centers in Brazil; women are most affected. Symptoms such as diarrhea and bleeding, as well as diarrhea and weight loss, must be taken as warning signs to investigate for inflammatory disease. The use of biologic therapies is frequent in referral centers when patients have severe disease.
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Affiliation(s)
- D B Cury
- Inflammatory Bowel Disease Center, Scope Clinic, Campo Grande/MS, Brazil,
| | - R Oliveira
- Biostatistics, UNESP, Botucatu, São Paulo, SP, Brazil
| | - M S Cury
- Advanced Endoscopy Center, Scope Clinic, Campo Grande/MS, Brazil
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22
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Increased Risk of Inflammatory Bowel Disease in Families with Tonsillectomy: A Danish National Cohort Study. Epidemiology 2019; 30:256-262. [PMID: 30461527 DOI: 10.1097/ede.0000000000000946] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND The possible etiologic link between tonsillectomy and inflammatory bowel diseases remains unclear. To investigate the hereditary component, we assessed the risk of inflammatory bowel disease after own tonsillectomy as well as after tonsillectomy among family members. METHODS A nationwide Danish cohort of 7,045,288 individuals was established and linked to comprehensive national registers with data on kinship, tonsillectomy surgery, and diagnosis of inflammatory bowel disease from all health sectors. We used Poisson regression models to estimate hospital contact rate ratios (RR) for Crohn's disease and ulcerative colitis, with 95% confidence intervals (CI), between individuals with or without tonsillectomy, as well as between individuals with or without tonsillectomized relatives. RESULTS During 189 million person-years of follow-up between 1977 and 2014, 276,673 individuals were tonsillectomized, 22,015 developed Crohn's disease, and 49,550 developed ulcerative colitis. Rates of inflammatory bowel disease were elevated up to 20 years after own tonsillectomy (Crohn's disease: RR 1.52 [95% CI = 1.43, 1.61]; ulcerative colitis: RR 1.24 [95% CI = 1.18, 1.29]). RRs for Crohn's disease was 1.22 (95% CI = 1.17, 1.27) after first-degree relatives' tonsillectomy, 1.14 (95% CI = 1.08, 1.19) after second-degree relatives' tonsillectomy, and 1.08 (95% CI = 1.01, 1.15) after third-degree relatives' tonsillectomy. Corresponding RRs for ulcerative colitis were 1.10 (95% CI = 1.07, 1.13), 1.05 (95% CI = 1.01, 1.08), and 1.03 (95% CI = 0.98, 1.09). CONCLUSIONS Even individuals with tonsillectomized family members were at increased risk of inflammatory bowel disease. These findings call into question a direct influence of tonsillectomy on gastrointestinal inflammation and point instead toward shared hereditary or environmental factors. See video abstract at, http://links.lww.com/EDE/B464.
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23
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Svensson E, Henderson VW, Szépligeti S, Stokholm MG, Klug TE, Sørensen HT, Borghammer P. Tonsillectomy and risk of Parkinson's disease: A danish nationwide population-based cohort study. Mov Disord 2017; 33:321-324. [PMID: 29193401 DOI: 10.1002/mds.27253] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 10/23/2017] [Accepted: 10/26/2017] [Indexed: 11/07/2022] Open
Abstract
BACKGROUND We hypothesized that tonsillectomy modifies the risk of PD. OBJECTIVES To test the hypothesis in a nationwide population-based cohort study. METHODS We used Danish medical registries to construct a cohort of all patients in Denmark with an operation code of tonsillectomy 1980-2010 (n = 195,169) and a matched age and sex general population comparison cohort (n = 975,845). Patients were followed until PD diagnosis, death, censoring, or end of follow-up 30 November 2013. Using Cox regression, we computed hazard ratios for PD and corresponding 95% confidence intervals, adjusting for age and sex by study design, and potential confounders. RESULTS We identified 100 and 568 patients diagnosed with PD among the tonsillectomy and general population comparison cohort, respectively, finding similar risks of PD (adjusted hazard ratio = 0.95 [95% confidence interval: 0.76-1.19]; for > 20 years' follow-up (adjusted hazard ratio = 0.96 [95% confidence interval: 0.64-1.41]). CONCLUSION Tonsillectomy is not associated with risk of PD, especially early-onset PD. © 2017 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Elisabeth Svensson
- Department of Clinical Epidemiology,Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark.,The Danish Clinical Registries, Denmark
| | - Victor W Henderson
- Department of Clinical Epidemiology,Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark.,Department of Health Research & Policy, Stanford University, Stanford, California, USA.,Department of Neurology & Neurological Sciences, Stanford University, Stanford, California, USA
| | - Szimonetta Szépligeti
- Department of Clinical Epidemiology,Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Morten Gersel Stokholm
- Department of Nuclear Medicine & PET Centre, Aarhus University Hospital, Aarhus, Denmark
| | - Tejs Ehlers Klug
- Department of Otorhinolaryngology, Head & Neck Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Henrik Toft Sørensen
- Department of Clinical Epidemiology,Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark.,Department of Health Research & Policy, Stanford University, Stanford, California, USA
| | - Per Borghammer
- Department of Nuclear Medicine & PET Centre, Aarhus University Hospital, Aarhus, Denmark
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24
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Fulforth JM, Gearry RB. Inflammatory bowel disease risk and the environment: Where to next? J Gastroenterol Hepatol 2016; 31:1074-5. [PMID: 27240003 DOI: 10.1111/jgh.13375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Revised: 03/06/2016] [Accepted: 03/10/2016] [Indexed: 12/09/2022]
Affiliation(s)
- James M Fulforth
- Department of Gastroenterology, Christchurch Hospital, Christchurch, New Zealand
| | - Richard B Gearry
- Department of Gastroenterology, Christchurch Hospital, Christchurch, New Zealand.,Department of Medicine, University of Otago, Christchurch, New Zealand
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