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Guo X, Su W, Wang H, Li N, Song Q, Liang Q, Sun C, Liang M, Zhou Z, Song EJ, Sun Y. Short-term exposure to ambient ozone and cardiovascular mortality in China: a systematic review and meta-analysis. Int J Environ Health Res 2023; 33:958-975. [PMID: 35438585 DOI: 10.1080/09603123.2022.2066070] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 04/09/2022] [Indexed: 06/14/2023]
Abstract
Air pollution is a major public health concern in China. Notwithstanding this, there is limited evidence regarding the impact of short-term exposure to ambient ozone on cardiovascular mortality in the Chinese population. Therefore, we conducted this meta-analysis to address this important question. The random-effects model was applied to pool the results from individual studies. Finally, 32 effect estimates extracted from 19 studies were pooled in this meta-analysis. The pooled relative risk for cardiovascular mortality for each 10 µg/m3 increment in ozone concentration was 1.0068 (95% CI: 1.0049, 1.0086). Ths significant positive association between ozone exposure and cardiovascular mortality was also observed in different two-pollutant models. This meta-analysis revealed that exposure to ozone was associated with an increased risk of cardiovascular mortality in China, and more efforts on controlling the population from ozone are needed to improve cardiovascular health of Chinese population.
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Affiliation(s)
- Xianwei Guo
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
| | - Wanying Su
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
| | - Hao Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
| | - Ning Li
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
| | - Qiuxia Song
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
| | - Qiwei Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
| | - Chenyu Sun
- Internal Medicine, AMITA Health Saint Joseph Hospital Chicago, Chicago, IL, USA
| | - Mingming Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
| | - Zhen Zhou
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
| | - Evelyn J Song
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, CA, USA
| | - Yehuan Sun
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, Anhui, P.R. China
- Chaohu Hospital of Anhui Medical University, Hefei, Anhui Province, P.R. China
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2
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Guo X, Ke Y, Wu B, Song Q, Sun C, Li Y, Wang H, Su W, Liang Q, Lowe S, Bentley R, Song EJ, King B, Zhou Q, Xie R, Deng F. Exploratory analysis of the association between organophosphate ester mixtures with high blood pressure of children and adolescents aged 8-17 years: cross-sectional findings from the National Health and Nutrition Examination Survey. Environ Sci Pollut Res Int 2023; 30:22900-22912. [PMID: 36308653 DOI: 10.1007/s11356-022-23740-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Epidemiological studies on the effect of organophosphate esters (OPEs) on high blood pressure (BP) among children and adolescents are scant. Therefore, the main objective of the present study was to explore the effect of exposure to OPEs on high BP among children and adolescents. A total of 1340 participants were included in the current analyses. Multivariable logistic regression models were implemented to calculate odds ratios (ORs) and corresponding 95% confidence intervals (CIs) to examine the association between OPE metabolites and high BP. We also assessed the modified effect of sex, age, and overweight/obesity on this association. Furthermore, quantile g-computation (Qgcomp) and Bayesian kernel machine regression (BKMR) were exhibited to analyze the association between multiple OPE metabolite mixtures and high BP. After adjusting for covariates, the highest (vs. lowest) tertiles of bis (1-choloro-2-propyl) phosphate (BCPP), bis-2-chloroethyl phosphate (BCEP), and di-n-butyl phosphate (DBUP) were associated with 1.23 (95% CI: 0.83, 1.83), 1.27 (95% CI: 0.85, 1.92), and 1.01 (95% CI: 0.67, 1.53) odds ratios for high BP, respectively. In the Qgcomp, a quartile increase in OPE metabolite mixtures was weakly associated with an elevated risk of high BP (adjusted OR: 1.06, 95CI%: 0.81, 1.37). The results from BKMR showed a positive trend of association between OPE metabolite mixture on the risk of high BP. In conclusion, our study demonstrated that higher levels of BCPP, BCEP, and DBUP were weakly associated with high BP among US children and adolescents. Moderate evidence suggested OPE metabolite mixtures had positive joint effects on high BP. Consequently, longitudinal studies with repeated measurements are warranted to examine the relationships between multiple OPE metabolites and high blood pressure among children and adolescents.
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Affiliation(s)
- Xianwei Guo
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Yujie Ke
- Children's Hospital of Anhui Medical University, 39 Wangjiang East Road, Hefei, 230051, Anhui, People's Republic of China
| | - Birong Wu
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Qiuxia Song
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Chenyu Sun
- AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, IL, 60657, USA
| | - Yaru Li
- Internal Medicine, Swedish Hospital, 5140 N California Ave, Chicago, IL, 60625, USA
| | - Hao Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Wanying Su
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Qiwei Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
- Children's Hospital of Anhui Medical University, 39 Wangjiang East Road, Hefei, 230051, Anhui, People's Republic of China
| | - Scott Lowe
- College of Osteopathic Medicine, Kansas City University, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Rachel Bentley
- College of Osteopathic Medicine, Kansas City University, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Evelyn J Song
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, CA, USA
| | - Bethany King
- Internal Medicine, MercyOne Des Moines Medical Center, 1111 6Th Avenue, Des Moines, IA, 50314, USA
| | - Qin Zhou
- Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Ruijin Xie
- School of Medicine, Jiangnan University, No. 1800, Lihu Avenue, Wuxi, 214122, People's Republic of China
| | - Fang Deng
- Children's Hospital of Anhui Medical University, 39 Wangjiang East Road, Hefei, 230051, Anhui, People's Republic of China.
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Guo X, Li N, Wang H, Su W, Song Q, Liang Q, Liang M, Sun C, Li Y, Lowe S, Bentley R, Song EJ, Zhou Q, Ding X, Sun Y. Combined exposure to multiple metals on cardiovascular disease in NHANES under five statistical models. Environ Res 2022; 215:114435. [PMID: 36174761 DOI: 10.1016/j.envres.2022.114435] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 09/13/2022] [Accepted: 09/22/2022] [Indexed: 06/16/2023]
Abstract
BACKGROUND It is well-documented that heavy metals are associated with cardiovascular disease (CVD). However, there is few studies exploring effect of metal mixture on CVD. Therefore, the primary objective of present study was to investigate the joint effect of heavy metals on CVD and to identify the most influential metals in the mixture. METHODS Original data for study subjects were obtained from the National Health and Nutrition Examination Survey. In this study, adults with complete data on 12 kinds of urinary metals (antimony, arsenic, barium, cadmium, cobalt, cesium, molybdenum, mercury, lead, thallium, tungsten, and uranium), cardiovascular disease, and core covariates were enrolled. We applied five different statistical strategies to examine the CVD risk with metal exposure, including multivariate logistic regression, adaptive elastic net combined with Environmental Risk Score, Quantile g-computation, Weighted Quantile Sum regression, and Bayesian kernel machine regression. RESULTS Higher levels of cadmium, tungsten, cobalt, and antimony were significantly associated with Increased risk of CVD when covariates were adjusted for multivariate logistic regression. The results from multi-pollutant strategies all indicated that metal mixture was positively associated with the risk of CVD. Based on the results of multiple statistical strategies, it was determined that cadmium, tungsten, cobalt, and antimony exhibited the strongest positive correlations, whereas barium, lead, molybdenum, and thallium were most associated with negative correlations. CONCLUSION Overall, our study demonstrates that exposure to heavy metal mixture is linked to a higher risk of CVD. Meanwhile, this association may be driven primarily by cadmium, tungsten, cobalt, and antimony. Further prospective studies are warranted to validate or refute our primary findings as well as to identify other important heavy metals linked with CVD.
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Affiliation(s)
- Xianwei Guo
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Ning Li
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Hao Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Wanying Su
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Qiuxia Song
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Qiwei Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Mingming Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Chenyu Sun
- AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, IL, 60657, USA
| | - Yaru Li
- Internal Medicine, Swedish Hospital, 5140 N California Ave, Chicago, IL, 60625, USA
| | - Scott Lowe
- College of Osteopathic Medicine, Kansas City University, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Rachel Bentley
- College of Osteopathic Medicine, Kansas City University, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Evelyn J Song
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, CA, USA
| | - Qin Zhou
- Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Xiuxiu Ding
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China
| | - Yehuan Sun
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, PR China; Chaohu Hospital, Anhui Medical University, Hefei, 238006, Anhui, PR China.
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Ge T, Zhu Z, Wang J, Zhou W, Song EJ, Tang S. A rare cause of abdominal pain managed unconventionally: acute renal infarction caused by atrial fibrillation: a case report. J Med Case Rep 2022; 16:381. [PMID: 36258245 PMCID: PMC9580199 DOI: 10.1186/s13256-022-03608-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/07/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Atrial fibrillation is one of the most common arrhythmias. The main thrombotic complication of arterial fibrillation is ischemic stroke, but it can also cause acute renal infarction from embolization. The low incidence and nonspecific clinical manifestations of acute renal infarction make it difficult to diagnose, often leading to either delayed diagnosis or misdiagnosis. Due to its rarity, more efficient treatment guidelines are helpful for the management of acute renal infarction related to the thromboembolic complication of arterial fibrillation. CASE REPORTS We report a case of acute renal infarction due to underlying arterial fibrillation, where a novel interventional therapeutic method was used. A 66-year-old Chinese man with arterial fibrillation, not on anticoagulation due to the patient's preference, and coronary artery disease post-percutaneous coronary intervention to left anterior descending artery about 1 year ago, was currently on dual antiplatelet therapy. He suddenly developed intermittent and sharp left-sided abdominal pain and was found to have an acute left renal infarction on computed tomography scan. Angiogram showed acute occlusion of the left renal artery due to thromboembolism. For this patient, a combination method of local thrombus aspiration, angioplasty, and infusion of nitroglycerin and diltiazem were used, restoring blood flow to the left kidney. After recovery, the patient was discharged on aspirin, clopidogrel, and warfarin. At 6 months follow-up, there was no residual kidney dysfunction. CONCLUSIONS Acute renal infarction from thromboembolism is a rare but serious complication of arterial fibrillation. More efficient and different options for intervention methods will benefit the treatment of this disease. Here, we report a combination therapeutic method that has not been used in acute renal infarction associated with arterial fibrillation, and which restored renal perfusion and prevented long-term kidney injury.
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Affiliation(s)
- Tao Ge
- Department of Cardiology, The First Affiliated Hospital, Wannan Medical College, No.2, Zhe Shan West Road, Wuhu, 241001, Anhui, China
| | - ZhengCai Zhu
- Department of Cardiology, The First Affiliated Hospital, Wannan Medical College, No.2, Zhe Shan West Road, Wuhu, 241001, Anhui, China
| | - Jinfeng Wang
- Department of Cardiology, The First Affiliated Hospital, Wannan Medical College, No.2, Zhe Shan West Road, Wuhu, 241001, Anhui, China
| | - Wenjiao Zhou
- Department of Electrocardiogram, The First Affiliated Hospital, Wannan Medical College, Wuhu, Anhui, China
| | - Evelyn J Song
- Division of Cardiology, University of California San Francisco, San Francisco, CA, 94143, USA.
| | - Shengxing Tang
- Department of Cardiology, The First Affiliated Hospital, Wannan Medical College, No.2, Zhe Shan West Road, Wuhu, 241001, Anhui, China.
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Guo X, Su W, Li N, Song Q, Wang H, Liang Q, Li Y, Lowe S, Bentley R, Zhou Z, Song EJ, Cheng C, Zhou Q, Sun C. Association of urinary or blood heavy metals and mortality from all causes, cardiovascular disease, and cancer in the general population: a systematic review and meta-analysis of cohort studies. Environ Sci Pollut Res Int 2022; 29:67483-67503. [PMID: 35917074 DOI: 10.1007/s11356-022-22353-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 07/28/2022] [Indexed: 06/15/2023]
Abstract
Amounting epidemiological evidence has shown detrimental effects of heavy metals on a wide range of diseases. However, the effect of heavy metal exposure on mortality in the general population remains unclear. The primary objective of this study was to clarify the associations between heavy metals and mortality from all causes, cardiovascular disease (CVD), and cancer based on prospective studies. We comprehensively searched Pubmed, Embase, and Web of Science electronic databases to identify studies published from their inception until 1 March 2022. Investigators identified inclusion criteria, extracted study characteristics, and assessed the methodological quality of included studies according to standardized guidelines. Meta-analysis was conducted if the effect estimates of the same outcome were reported in at least three studies. Finally, 42 original studies were identified. The results of meta-analysis showed that cadmium and lead exposure was significantly associated with mortality from all causes, CVD, and cancer in the general population. Moderate evidence suggested there was a link between arsenic exposure and mortality. The adverse effects of mercury and other heavy metals on mortality were inconclusive. Epidemiological evidence for the joint effect of heavy metal exposure on mortality was still indeterminate. In summary, our study provided compelling evidence that exposure to cadmium, lead, and arsenic were associated with mortality from all causes, CVD, and cancer, while the evidence on other heavy metals, for example mercury, was insignificant or indeterminate. Nevertheless, further prospective studies are warranted to explore the joint effects of multiple metal exposure on mortality.
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Affiliation(s)
- Xianwei Guo
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Wanying Su
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Ning Li
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Qiuxia Song
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Hao Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Qiwei Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei, 230032, Anhui, People's Republic of China
| | - Yaru Li
- Internal Medicine, Swedish Hospital, 5140 N California Ave, Chicago, IL, 60625, USA
- College of Osteopathic Medicine, Des Moines University, 3200 Grand Ave, Des Moines, IA, 50312, USA
| | - Scott Lowe
- College of Osteopathic Medicine, Kansas City University, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Rachel Bentley
- College of Osteopathic Medicine, Kansas City University, 1750 Independence Ave, Kansas City, MO, 64106, USA
| | - Zhen Zhou
- Menzies Institute for Medical Research, University of Tasmania, 17 Liverpool Street, Hobart, TAS, TAS, 7000, Australia
| | - Evelyn J Song
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, CA, USA
| | - Ce Cheng
- The University of Arizona College of Medicine, 1501 N Campbell Ave, Tucson, AZ, 85724, USA
- Banner-University Medical Center South, 2800 E Ajo Way, Tucson, AZ, 85713, USA
| | - Qin Zhou
- Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA
| | - Chenyu Sun
- AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, IL, 60657, USA.
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Abstract
In both cardiovascular disease and cancer, there are established sex-based differences in prevalence and outcomes. Males and females may also differ in terms of risk of cardiotoxicity following cancer therapy, including heart failure, cardiomyopathy, atherosclerosis, thromboembolism, arrhythmias, and myocarditis. Here, we describe sex-based differences in the epidemiology and pathophysiology of cardiotoxicity associated with anthracyclines, hematopoietic stem cell transplant (HCT), hormone therapy and immune therapy. Relative to males, the risk of anthracycline-induced cardiotoxicity is higher in prepubertal females, lower in premenopausal females, and similar in postmenopausal females. For autologous hematopoietic cell transplant, several studies suggest an increased risk of late heart failure in female lymphoma patients, but sex-based differences have not been shown for allogeneic hematopoietic cell transplant. Hormone therapies including GnRH (gonadotropin-releasing hormone) modulators, androgen receptor antagonists, selective estrogen receptor modulators, and aromatase inhibitors are associated with cardiotoxicity, including arrhythmia and venous thromboembolism. However, sex-based differences have not yet been elucidated. Evaluation of sex differences in cardiotoxicity related to immune therapy is limited, in part, due to low participation of females in relevant clinical trials. However, some studies suggest that females are at increased risk of immune checkpoint inhibitor myocarditis, although this has not been consistently demonstrated. For each of the aforementioned cancer therapies, we consider sex-based differences according to cardiotoxicity management. We identify knowledge gaps to guide future mechanistic and prospective clinical studies. Furthering our understanding of sex-based differences in cancer therapy cardiotoxicity can advance the development of targeted preventive and therapeutic cardioprotective strategies.
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Affiliation(s)
- Nicholas S. Wilcox
- Division of Cardiology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Seth J. Rotz
- Department of Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, OH, USA,Department of Pediatric Hematology, Oncology, and Blood and Marrow Transplantation, Pediatric Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - McKay Mullen
- Stanford Cardiovascular Institute, Stanford, CA, USA
| | - Evelyn J. Song
- Division of Hospital Medicine, Department of Medicine, University of California, San Francisco, CA, USA
| | - Betty Ky Hamilton
- Department of Hematology and Oncology, Taussig Cancer Institute, Cleveland Clinic Foundation, Cleveland, OH, USA
| | - Javid Moslehi
- Section of Cardio-Oncology & Immunology, Division of Cardiology and the Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA, USA
| | - Saro Armenian
- Department of Population Sciences, City of Hope Comprehensive Cancer Center; Duarte, CA, USA
| | - Joseph C. Wu
- Stanford Cardiovascular Institute, Stanford, CA, USA
| | - June Wha Rhee
- Department of Medicine, City of Hope Comprehensive Cancer Center; Duarte, CA, USA
| | - Bonnie Ky
- Division of Cardiology, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA,Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA,Department of Biostatistics, Epidemiology and Informatics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
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7
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Stern LK, Cuk N, Marano PJ, Kwan AC, Song EJ, Megna DJ, Cheng S. Sudden Cardiac Arrest Due to Ascending Aortic Thrombus Originating From Penetrating Aortic Ulcer. JACC Case Rep 2021; 3:1617-1621. [PMID: 34729514 PMCID: PMC8543156 DOI: 10.1016/j.jaccas.2021.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 07/29/2021] [Accepted: 08/02/2021] [Indexed: 12/02/2022]
Abstract
Penetrating aortic ulcers typically occur in severely diseased vessels. We present the case of a 46-year-old woman, without extensive atherosclerosis, who had sudden cardiac arrest related to ischemia from a mobile intraluminal aortic thrombus adherent to a penetrating ulcer in the ascending aorta. (Level of Difficulty: Intermediate.)
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Affiliation(s)
- Lily K Stern
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Natasha Cuk
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Paul J Marano
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Alan C Kwan
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Evelyn J Song
- Department of Internal Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Dominick J Megna
- Department of Cardiac Surgery, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Susan Cheng
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
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8
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Zhang H, Ma S, Han T, Qu G, Cheng C, Uy JP, Shaikh MB, Zhou Q, Song EJ, Sun C. Association of smoking history with severe and critical outcomes in COVID-19 patients: A systemic review and meta-analysis. Eur J Integr Med 2021; 43:101313. [PMID: 33619437 PMCID: PMC7889467 DOI: 10.1016/j.eujim.2021.101313] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 02/10/2021] [Accepted: 02/15/2021] [Indexed: 01/08/2023]
Abstract
Introduction The highly infectious coronavirus disease 2019 (COVID-19) has now rapidly spread around the world. This meta-analysis was strictly focused on the influence of smoking history on the severe and critical outcomes on people with COVID-19 pneumonia. Methods A systematic literature search was conducted in eight online databases before 1 February 2021. All studies meeting our selection criteria were included and evaluated. Stata 14.0 software was used to analyze the data. Results A total of 109 articles involving 517,020 patients were included in this meta-analysis. A statistically significant association was discovered between smoking history and COVID-19 severity, the pooled OR was 1.55 (95%CI: 1.41-1.71). Smoking was significantly associated with the risk of admission to intensive care unit (ICU) (OR=1.73, 95%CI: 1.36-2.19), increased mortality (OR=1.58, 95%CI: 1.38-1.81), and critical diseases composite endpoints (OR=1.61, 95%CI: 1.35-1.93), whereas there was no relationship with mechanical ventilation. The pooled prevalence of smoking using the random effects model (REM) was 15% (95%CI: 14%-16%). Meta-regression analysis showed that age (P=0.004), hypertension (P=0.007), diabetes (P=0.029), chronic obstructive pulmonary disease (COPD) (P=0.001) were covariates that affect the association. Conclusions Smoking was associated with severe or critical outcomes and increased the risk of admission to ICU and mortality in COVID-19 patients, but not associated with mechanical ventilation. This association was more significant for former smokers than in current smokers. Current smokers also had a higher risk of developing severe COVID-19 compared with non-smokers. More detailed data, which are representative of more countries, are needed to confirm these preliminary findings.
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Affiliation(s)
- Huimei Zhang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Shaodi Ma
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Tiantian Han
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Guangbo Qu
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, Hefei 230032, Anhui, PR China
| | - Ce Cheng
- The University of Arizona College of Medicine at South Campus, 2800 E Ajo Way, Tucson AZ, 85713, USA
| | - John Patrick Uy
- AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago 60657, Illinois, USA
| | - Mohammad Baseem Shaikh
- AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago 60657, Illinois, USA
| | - Qin Zhou
- Mayo Clinic, Rochester, MN, 55905, USA
| | - Evelyn J Song
- Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Chenyu Sun
- AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago 60657, Illinois, USA
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Hu RM, Song EJ, Tester DJ, Deschenes I, Ackerman MJ, Makielski JC, Tan BH. Expression defect of the rare variant/Brugada mutation R1512W depends upon the SCN5A splice variant background and can be rescued by mexiletine and the common polymorphism H558R. Channels (Austin) 2021; 15:253-261. [PMID: 33535892 PMCID: PMC7872018 DOI: 10.1080/19336950.2021.1875645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Background: Mutations in SCN5A that decrease Na current underlie arrhythmia syndromes such as the Brugada syndrome (BrS). SCN5A in humans has two splice variants, one lacking a glutamine at position 1077 (Q1077del) and one containing Q1077. We investigated the effect of splice variant background on loss-of-function and rescue for R1512W, a mutation reported to cause BrS.Methods and results: We made the mutation in both variants and expressed them in HEK-293 cells for voltage-clamp study. After 24 hours of transfection, the current expression level of R1512W was reduced by ~50% in both Q1077del and Q1077 compared to the wild-type (WT) channel, respectively. The activation and inactivation midpoint were not different between WT and mutant channels in both splice variant backgrounds. However, slower time constants of recovery and enhanced intermediate inactivation were observed for R1512W/Q1077 compared with WT-Q1077, while the recovery and intermediate inactivation parameters of R1512W/Q1077del were similar to WT-Q1077del. Furthermore, both mexiletine and the common polymorphism H558R restored peak sodium current (INa) amplitude of the mutant channel by increasing the cell surface expression of SCN5A.Conclusion: These findings provide further evidence that the splice variant affects the molecular phenotype with implications for the clinical phenotype, and they provide insight into the expression defect mechanisms and potential treatment in BrS.
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Affiliation(s)
- Rou-Mu Hu
- Department of Cardiology, Heart Center & Beijing Key Laboratory of Hypertension, Beijing Chaoyang Hospital, Capital Medical University , Beijing, China.,Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin , Madison, WI, USA
| | - Evelyn J Song
- Department of Medicine, Johns Hopkins University School of Medicine , Baltimore, MD, USA
| | - David J Tester
- Departments of Medicine, Pediatrics, and Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester , MN, USA
| | - Isabelle Deschenes
- Department of Physiology and Cell Biology, The Dorothy M. Davis Heart and Lung Research Institute, Frick Center for Heart Failure and Arrhythmia, the Ohio State University , Columbus, OH, USA
| | - Michael J Ackerman
- Departments of Medicine, Pediatrics, and Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester , MN, USA
| | - Jonathan C Makielski
- Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin , Madison, WI, USA
| | - Bi-Hua Tan
- Division of Cardiovascular Medicine, Department of Medicine, University of Wisconsin , Madison, WI, USA.,Department of Physiology and Cell Biology, The Dorothy M. Davis Heart and Lung Research Institute, Frick Center for Heart Failure and Arrhythmia, the Ohio State University , Columbus, OH, USA
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Qu G, Sun C, Sharma M, Uy JP, Song EJ, Bhan C, Shu L. Is antibiotics use really associated with increased risk of colorectal cancer? An updated systematic review and meta-analysis of observational studies. Int J Colorectal Dis 2020; 35:1397-1412. [PMID: 32504337 DOI: 10.1007/s00384-020-03658-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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] [Accepted: 05/25/2020] [Indexed: 02/04/2023]
Abstract
PURPOSE The association between antibiotics and colorectal cancer (CRC) risk has drawn increasing attention but remains controversial. This study was performed to clarify the association. METHODS A systematic review and meta-analysis was performed on seven electronic databases. The pooled odds ratios (OR) with a 95% confidence interval (CI) were calculated to estimate the association using the fixed-effects model or the random-effects model. RESULTS Ten studies that contained 4,853,289 participants were included in our study. We found that antibiotics use was associated with a higher risk of CRC (OR 1.09, 95%CI 1.02-1.17, I2 = 92.8%). More than 60 days of antibiotics use and 5 prescriptions of antibiotics were significantly associated with a higher risk of CRC. Sub-analysis on different types of antibiotics found that anti-anaerobic antibiotics, penicillins, and quinolones use led to increased risk of CRC (OR 1.22, 95% CI 1.04-1.44, I2 = 89.1%; OR 1.09, 95% CI 1.04-1.13, I2 = 69.2%; OR 1.15, 95% CI 1.03-1.35, I2 = 88.2%; respectively) and colon cancer (OR 1.28, 95% CI 1.04-1.58, I2 = 98.5%; OR 1.09, 95% CI 1.05-1.12, I2 = 0; OR 1.09, 95% CI 1.04-1.15, I2 = 0; respectively). However, antibiotics use was not significantly associated with rectal cancer (OR 1.03, 95% CI 0.92-1.16, I2 = 77.6%). CONCLUSION It needs attention that antibiotics use is associated with a higher risk of CRC, especially for colon cancer. Clinicians should be aware of the potential risk of CRC when prescribing anti-anaerobic antibiotics, penicillins, and quinolones in the future. Further studies are needed to assess any potential differences by tumor sites and class of antibiotics.
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Affiliation(s)
- Guangbo Qu
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Chenyu Sun
- Internal Medicine, AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, IL, 60657, USA.
| | - Monica Sharma
- Infectious Disease, AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, IL, 60657, USA
| | - John Patrick Uy
- Internal Medicine, AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, IL, 60657, USA
| | - Evelyn J Song
- Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Chandur Bhan
- Internal Medicine, AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, IL, 60657, USA
| | - Liqin Shu
- Department of Child Health Care, Maternal and Child Health Care Hospital of Anhui Province (Affiliated Maternal and Child Health Care Hospital of Anhui Medical University), Hefei, 230001, Anhui, China
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Zhang Y, Sun C, Song EJ, Liang M, Shi T, Min M, Sun Y. Is periodontitis a risk indicator for gastrointestinal cancers? A meta‐analysis of cohort studies. J Clin Periodontol 2019; 47:134-147. [DOI: 10.1111/jcpe.13217] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 09/26/2019] [Accepted: 10/30/2019] [Indexed: 01/06/2023]
Affiliation(s)
- Yun Zhang
- Department of Epidemiology and Health Statistics School of Public Health Anhui Medical University Hefei China
| | - Chenyu Sun
- AMITA Health Saint Joseph Hospital Chicago Chicago IL USA
| | - Evelyn J. Song
- Department of Medicine Johns Hopkins University School of Medicine Baltimore MD USA
| | - Mingming Liang
- Department of Epidemiology and Health Statistics School of Public Health Anhui Medical University Hefei China
| | - Tingting Shi
- Department of Epidemiology and Health Statistics School of Public Health Anhui Medical University Hefei China
| | - Min Min
- Department of Epidemiology and Health Statistics School of Public Health Anhui Medical University Hefei China
| | - Yehuan Sun
- Department of Epidemiology and Health Statistics School of Public Health Anhui Medical University Hefei China
- Center for Evidence‐Based Practice Anhui Medical University Hefei China
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Zhang Y, Liang M, Sun C, Song EJ, Cheng C, Shi T, Min M, Sun Y. Proton pump inhibitors use and dementia risk: a meta-analysis of cohort studies. Eur J Clin Pharmacol 2019; 76:139-147. [PMID: 31748819 DOI: 10.1007/s00228-019-02753-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [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: 05/10/2019] [Accepted: 09/01/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE The aim of this study was to explore the relationship between proton pump inhibitors use and the risk of dementia. METHODS A comprehensive literature search was conducted in English and Chinese databases from origination to December 2018. The pooled hazard ratios (HRs) and 95% confidence intervals (CIs) were calculated with a random-effects model. Subgroup analyses and sensitivity analyses were also conducted. Cochran's Q test and the I2 statistic were used to evaluate the heterogeneity. Publication bias was assessed by Begg's test and Egger's test. RESULTS Six studies were included, which contained a total of 166,146 participants. The overall result demonstrated a significant increase in dementia risk with proton pump inhibitors use (HR = 1.29, 95% CI = 1.12-1.49). In subgroup analyses, a significant association was detected between proton pump inhibitors use and the risk of dementia in Europe (HR = 1.46, 95% CI = 1.23-1.73) and among participants aged ≥ 65 years (HR = 1.39, 95% CI = 1.17-1.65). For the factor follow-up time ≥ 5 years, the pooled HR was 1.28 (95% CI = 1.12-1.46), demonstrating a 1.28-fold increase in the risk of dementia among proton pump inhibitors users. In the case of regional impact, participants from Europe showed an overall pooled HR estimate of 1.46 (95% CI = 1.23-1.73). There was no evidence of publication bias. CONCLUSIONS The overall result of this meta-analysis supports the hypothesis that proton pump inhibitors increase the risk of dementia. Furthermore, high-quality cohort studies are needed to confirm these findings.
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Affiliation(s)
- Yun Zhang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Mingming Liang
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Chenyu Sun
- AMITA Health Saint Joseph Hospital Chicago, 2900 N. Lake Shore Drive, Chicago, 60657, Illinois, USA
| | - Evelyn J Song
- Department of Medicine, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
| | - Ce Cheng
- Cape Fear Valley Medical Center, 1638 Owen Dr, Fayetteville, 28304, North Carolina, USA
| | - Tingting Shi
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Min Min
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei, 230032, Anhui, China
| | - Yehuan Sun
- Department of Epidemiology and Health Statistics, School of Public Health, Anhui Medical University, No. 81 Meishan Road, Hefei, 230032, Anhui, China.
- Center for Evidence-Based Practice, Anhui Medical University, Hefei, 230032, Anhui, China.
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Cho JN, Song EJ, Lee MH, Jung SY, Lee S, Kang HS, Sim SH, Park IH, Lee KS, Kim YJ, Kim SK, Kwon Y, Nam BH, Lee ES. Abstract P2-01-12: Development of prediction model for omission of sentinel lymph node biopsy in T1 breast cancer. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p2-01-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
INTRODUCTION
Axillary sentinel lymph node (SLN) biopsy is a standard method for axillary nodal staging in the treatment of breast cancer. However, along with the trends to SLN performed only without additional axillary lymph node dissection, it's time to be considered omission of SLN for selective patients. We developed a prediction model to assess the negative probability of sentinel lymph node metastasis, specifically focus on the patients with clinical T1 breast cancer.
METHODS and MATERIALS
The study group consisted of 513 consecutive patients with clinical T1 breast cancer, who had undergone primary surgery between 2007 and 2012. The clinicopathologic factors and imaging modalities including breast ultrasound (US), magnetic resonance imaging (MRI), chest computed tomography (CT), and positron emission tomography (PET) were evaluated. Patients who fulfilled our inclusion criteria were randomized into experimental and validation set by 3:1 ratio. In the experimental group (n = 256), multivariate logistic regression analysis was used to analyze the association of each variable with the likelihood of SLN metastases. A prediction model was developed based on the patients in the experimental group and was validated with internal patient cohorts.
RESULTS
Of the 513 patients, 119 (23.1%) were found to have SLN metastases. In univariate analysis, presence of lymphovascular invasion (P < 0.001) and suspicious finding of preoperative image studies (US, PET, and MRI, P < 0.001) were independent positive predictors of SLN metastases. In multivariate analysis of experimental group, estrogen receptor status (P = 0.012), presence of lymphatic invasion (P < 0.001), and suspicious finding of preoperative image studies (US, PET, and MRI, P < 0.001) were each associated with involvement of SLN. A prediction model based on this analysis consists of 9 rows including 6 variables (age, estrogen receptor status, presence of lymphatic invasion, and results of preoperative US, PET or CT, MRI). The sum of assigned points for all six variables made corresponding value of negative probability of SLN metastasis. The accuracy of prediction model applied to the validation group, as measured by the area under the receiver operating curve was 0.789.
CONCLUSIONS
The prediction model developed here may be a useful tool to assess SLN involvement for clinical T1 breast cancer patients. And prospective study for additional validation of the prediction model is currently in preparation, exploring the possibility of SLN biopsy omission.
Citation Format: Cho JN, Song EJ, Lee MH, Jung S-Y, Lee S, Kang H-S, Sim SH, Park IH, Lee KS, Kim YJ, Kim S-K, Kwon Y, Nam B-H, Lee ES. Development of prediction model for omission of sentinel lymph node biopsy in T1 breast cancer [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P2-01-12.
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Affiliation(s)
- JN Cho
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - EJ Song
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - MH Lee
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - S-Y Jung
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - S Lee
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - H-S Kang
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - SH Sim
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - IH Park
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - KS Lee
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - YJ Kim
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - S-K Kim
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - Y Kwon
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - B-H Nam
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
| | - ES Lee
- Center for Breast Cancer, Research Institute and Hospital, National Cancer Center, Goyang, Korea; Gyeongsang National University Hospital, Jinu, Korea
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Lee MH, Park B, Song EJ, Park SJ, Kong SY, Lee ES. Abstract P4-10-12: Psychosocial health of disease-free breast cancer survivors compared with cancer-free general population: Korean health examinee cohort study. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p4-10-12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background/purpose: The number of long-term breast cancer survivors is increasing rapidly due to the growing rates of detection, incidence and improved survival. Quality of life (QOL) of physical and psychosocial health outcomes vary across the breast cancer survivors including diagnosis at different stages of breast cancer. There is little data regarding the psychosocial health of disease-free breast cancer survivors compared with those of general population. We conducted to assess the QOL, especially psychosocial health, of disease-free female survivors over 2 year after breast cancer diagnosis compared with cancer-free control women.
Methods: We used baseline data from the health examinee cohort, a part of the Korea Genome Epidemiology Study which is a large scaled cohort study established since 2001. This cohort has collected data of past medical history, socioeconomical factors (income, education, marital status and current employment status) and health behavioral factors (smoking, drinking, physical activity, BMI, menopausal status and subjective health status) of participants while they underwent regular health examination. The disease-free breast cancer survivors were defined as those who answered that they were ≥2 years from the initial diagnosis of breast cancer without recurrence and current treatment. Among the participants female subjects without history of any type cancer were randomly selected at 1:4 ratio by 5-year age groups, educational attainment level and household income as a comparison group. We analyzed Psychosocial Well-being Index-Short Form (PWI-SF) in these two groups. Subjects with score ≤8, 9–26, and 27 were classified as the 'healthy group', 'latent stress group', and 'stress group,' respectively.
Results: Total 347 survivors of breast cancer and 1,388 matched participants without cancer history were selected for analysis. Even after being matched for education and household income status, breast cancer survivors showed better psychosocial health status and health behaviors compared with matched comparison group. The prevalence of latent stress and stress group (vs healthy group) by PWI-SF score was 88.2% in breast cancer survivors and 89.9% in the matched female controls, showing borderline significant differences (p = 0.057). The prevalence rates of ever drinkers and smokers or obese women were lower and of those who exercised ≥150 min/week were higher in breast cancer survivors (p < 0.05). The total PWI-SF score was lower in breast cancer survivors, suggesting lower level of psychosocial stress level in breast cancer survivors. After adjusting for effects of other sociodemographic variables, breast cancer survivors were less likely to be included in stress group by 36% (OR = 0.64; 95% confidence interval [CI], 0.42–0.98).
Conclusions: The disease-free breast cancer survivors with regular health examination showed better psychosocial health status compared with matched general population. The better health behaviors in cancer survivors such as less alcohol drinking, low BMI, less history of smoking and more regular exercise, which have been identified in several previous cancer survivors studies might be attributed to their better psychosocial health status.
Citation Format: Lee MH, Park B, Song EJ, Park SJ, Kong S-Y, Lee ES. Psychosocial health of disease-free breast cancer survivors compared with cancer-free general population: Korean health examinee cohort study. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P4-10-12.
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Affiliation(s)
- MH Lee
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - B Park
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - EJ Song
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - SJ Park
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - S-Y Kong
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
| | - ES Lee
- Research Institute and Hospital, National Cancer Center, Goyang, Republic of Korea
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Do JH, Kim W, Cho YK, Lee J, Song EJ, Chun YM, Jeon JY. EFFECTS OF RESISTANCE EXERCISES AND COMPLEX DECONGESTIVE THERAPY ON ARM FUNCTION AND MUSCULAR STRENGTH IN BREAST CANCER RELATED LYMPHEDEMA. Lymphology 2015; 48:184-196. [PMID: 27164764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The incorporation of resistance exercises into the lifestyle of patients with lymphedema is understudied and an emerging interest. We investigated the effectiveness and results of adding a moderate intensity resistance exercise program for 8 weeks in conjunction with intensive CDT for 1 or 2 weeks (depending on severity) on arm volume, arm function, QOL, and muscular strength in patients with breast cancer-related lymphedema. This prospective, pilot trial included forty-four patients with a history of breast cancer who were beginning complex decongestive therapy for lymphedema. They were assigned to either the intervention (n = 22) or control (n = 22). groups. The intervention comprised of resis- tance band exercises 5 times a week for 8 weeks. These were initially supervised during the intensive lymphedema treatment, but performed independently during the study period. Limb volume, muscular strength, and the European Organization for Research and Treatment of Cancer QOL Questionnaire C30 (EORTC QLQ-C30), EORTC-Breast Cancer-Specific QOL Questionnaire (EORTC QLQ-BR23), and Disabilities of Arm, Shoulder, and Hand (DASH) questionnaires were assessed at baseline and at 8 weeks. After 8 weeks, the intervention group demonstrated statistically significant differences (p < 0.05) in the DASH score and muscular strength compared to the control group. Our results indicate that upper body resistance exercise demonstrates a positive effect on arm function and muscular strength without increasing arm volume in breast cancer related lymphedema during and shortly post intensive CDT lymphedema treatment.
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Tong YQ, Liu B, Liu H, Zheng HY, Gu J, Liu H, Song EJ, Song C, Li Y. Accurate genotyping of hepatitis C virus through nucleotide sequencing and identification of new HCV subtypes in China population. Clin Microbiol Infect 2015; 21:874.e9-874.e21. [PMID: 26055416 DOI: 10.1016/j.cmi.2015.05.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 05/10/2015] [Accepted: 05/26/2015] [Indexed: 12/21/2022]
Abstract
Nucleotide sequencing of the phylogenetically informative region of NS5B remains the gold standard for hepatitis C virus (HCV) genotyping. Here we developed a new methodology for sequencing new NS5B regions to increase the accuracy and sensitivity of HCV genotyping and subtyping. The eight new primers were identified by scanning the full-length NS5B regions from 1127 HCV genomic sequences found in HCV databases. The ability of each pair of primers to amplify HCV subtypes was scored, and the new primers were able to amplify the NS5B region better than the previously used primers, therefore more accurately subtyping HCV strains. Sequencing the DNA amplified by the new primer pairs can specifically and correctly detect the five standard HCV subtypes (1a, 2a, 3b, 6a and 1b). We further examined patient samples and found that the new primers were able to identify HCV subtypes in clinical samples with high sensitivity. This method was able to detect all subtypes of HCV in 567 clinical samples. Importantly, three novel HCV subtypes (1b-2a, 1b-2k and 6d-6k) were identified in the samples, which have not been previous reported in China. In conclusion, sequencing the NS5B region amplified by the new NS5B primers is a more reliable method of HCV genotyping and a more sensitive diagnostic tool than sequencing using the previously described primers, and could identify new HCV subtypes. Our research is useful for clinical diagnosis, guidance of clinical treatment, management of clinical patients, and studies on the epidemiology of HCV.
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Affiliation(s)
- Y-Q Tong
- Department of Clinical Laboratory, China; Clinical Molecular Diagnostic Centre, Renmin Hospital of Wuhan University, Wuhan, China
| | - B Liu
- Department of Pathology, Affiliated Tianyou Hospital of Wuhan University of Science and Technology, Wuhan, China
| | - H Liu
- Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai, China
| | - H-Y Zheng
- Clinical Molecular Diagnostic Centre, Renmin Hospital of Wuhan University, Wuhan, China
| | - J Gu
- Department of Clinical Laboratory, China
| | - H Liu
- Clinical Molecular Diagnostic Centre, Renmin Hospital of Wuhan University, Wuhan, China
| | - E J Song
- Pennsylvania State University College of Medicine and Hershey Medical Center, Hershey, PA, USA
| | - C Song
- Pennsylvania State University College of Medicine and Hershey Medical Center, Hershey, PA, USA.
| | - Y Li
- Department of Clinical Laboratory, China; Clinical Molecular Diagnostic Centre, Renmin Hospital of Wuhan University, Wuhan, China.
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Yu S, Hou D, Chen P, Zhang Q, Lv B, Ma Y, Liu F, Liu H, Song EJ, Yang D, Liu J. Adenosine induces apoptosis through TNFR1/RIPK1/P38 axis in colon cancer cells. Biochem Biophys Res Commun 2015; 460:759-65. [PMID: 25817730 DOI: 10.1016/j.bbrc.2015.03.103] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [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: 03/11/2015] [Accepted: 03/19/2015] [Indexed: 11/18/2022]
Abstract
Adenosine, a metabolite of ATP, ubiquitously exists in a wide range of organs and tissues. We previously reported that adenosine was implicated in apoptosis in many cancer cells by extrinsic and/or intrinsic pathways. Here, we found that adenosine suppresses the cell growth by induction of apoptosis of human colonic cancer cells through a novel mechanism. Adenosine suppresses the cell growth of human SW620 and SW480 colon cells in an adenosine transporter and adenosine kinase dependent manner. Moreover, the cell growth suppression is induced by apoptosis through activation of caspase-3 and PARP, and accumulation of ROS in cells. Importantly, we found that adenosine increases the expression of TNFR1 and RIPK1 and the phosphorylation of p38. Knockdown of TNFR1 or RIPK1 impairs the activation of p38, blocks the cleavage of PARP, and provides partially, yet significantly protection from cell death, including reducing the ROS generation in the colon cancer cells. These results indicate that a TNFR1/RIPK1/P38 axis is present in adenosine-induced apoptosis of colonic cancer cells. This axis triggers apoptosis and plays crucial roles in relay of the death signaling. Our study also provides additional experimental evidence for adenosine as a potent therapeutic drug in cancer therapy.
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Affiliation(s)
- Shunji Yu
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China; Institutes of Biomedical Sciences and Department of Immunology of Shanghai Medical School, Fudan University, Shanghai 200032, China
| | - Daisen Hou
- Institutes of Biomedical Sciences and Department of Immunology of Shanghai Medical School, Fudan University, Shanghai 200032, China
| | - Ping Chen
- Institutes of Biomedical Sciences and Department of Immunology of Shanghai Medical School, Fudan University, Shanghai 200032, China
| | - Qi Zhang
- Institutes of Biomedical Sciences and Department of Immunology of Shanghai Medical School, Fudan University, Shanghai 200032, China
| | - Bin Lv
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yunfang Ma
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Fuchen Liu
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China
| | - Hui Liu
- The Third Department of Hepatic Surgery, Eastern Hepatobiliary Surgery Hospital, Second Military Medical University, Shanghai 200438, China
| | - Evelyn J Song
- Pennsylvania State University College of Medicine and Hershey Medical Center, Hershey, PA 17033, USA
| | - Dongqin Yang
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
| | - Jie Liu
- Department of Digestive Diseases, Huashan Hospital, Fudan University, Shanghai 200040, China.
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You JY, Song EJ, Lee MH, Jung SY, Lee SY, Kang HS, Lee ES. Abstract P1-01-19: Role of axillary clearance with tumor positive sentinel node in mastectomy group: Is the results of ACOSOG Z0011 trial adaptable to mastectomy patient? Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p1-01-19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Recent data from ACOSOG Z0011 trial or AMAROS trial suggest that axillary lymph node dissection(ALND) may be unnecessary for patients with positive sentinel lymph node biopsy(SLNB) receiving breast conserving surgery(BCS) with irradiation. However, consensus statements and guidelines until recently recommended that patients with mastectomy and tumor positive sentinel node undergo completion ALND. In this preliminary study, we compared these patients who did not undergo ALND with the patients who received BCS with SLNB only and irradiation and we analyzed the locoregional recurrence rate to show no differences of outcomes between two groups.
Method: We identified 6,163 women with invasive breast cancer who underwent surgical resection at the National Cancer Center (Goyang,Gyeonggi-do,Korea) between January 2000 to December 2011. Clinico-pathological data obtained from prospective collecting medical database of our institution were analyzed retrospectively. The mastectomy with positive SLNB group was 47 patients and BCS with positive SLNB and irradiation group was 172 patients. The primary end point was loco-regional recurrence rate.
Result : Clinical and tumor characteristics were similar between two groups except T stage and receptor status. The mean tumor size was 5.5cm with mastectomy group and 3.5cm with BCS group. The median number of nodes removed was three. There was not a single case of locoregional recurrence in both groups. At a median follow-up of 53.5 months (last follow-up, May 2013), 5-year overall survival was 85.7% with mastectomy and 97.3% with BCS group.
Conclusion : In our study, there was no case of locoregional recurrence as above. This results lend weight to the argument that SLNB without ALND may be reasonable management for selected patients with appropriate surgery and adjuvant systemic therapy. This study can be regarded as a preliminary study with a sufficient value despite of the prognosis showed some statistical differences between two groups. It resides in the difference of initial stage of patients of two groups. We will present additional data compared with the mastectomy with axillary clearance group at the meeting.
Acknowledgement This work was supported by grant from the National Cancer Center Korea (1210331-2).
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P1-01-19.
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Affiliation(s)
- JY You
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - EJ Song
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - MH Lee
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - SY Jung
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - SY Lee
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - HS Kang
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
| | - ES Lee
- Center for Breast Cancer, National Cancer Center, Goyang, Gyeonggi-do, Korea
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Jung SY, Song EJ, You JY, Lee MH, Kwon Y, Ko KL, Park IH, Lee KS, Ro J, Lee S, Kang HS, Lee E, Shin KH. Abstract P3-08-14: Could the preoperative systemic therapy be a risk factor for breast cancer-related lymphedema in stage II/III breast cancer? Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p3-08-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: The breast cancer-related lymphedema (LE) has been known to be closely related to axillary lymph nodes dissection (ALND), chemotherapy, and radiation therapy. In this study, we evaluated whether the sequence of systemic chemotherapy and surgery could be a predictive factor in stage II/III breast cancer.
Methods and Materials: A total of 867 patients with stage II/III breast cancer, who underwent curative surgery with adequate systemic therapy from 2004 to 2009, were retrospectively analyzed. Adjuvant chemotherapy (ACT) was performed in 571 patients (65.9%) and preoperative systemic chemotherapy (PSC) in 296 (34.1%). We evaluated the incidence of LE by clinicopathologic factors and treatments.
Results: At a median follow-up of 5.1 years (range, 3.0-8.3 years), 360 patients (41.5%) had experienced LE, 244 patients have retained LE (permanent LE), and 116 patents were normalized. The overall 5-year cumulative incidence of LE was 17%. LE occurred in 188 patients (32.9%) in patients with ACT, 172 patients (58.1%) with PSC (P<0.001), permanent LE in 121 (21.2%) with ACT, 123 (41.6%) with PSC (P<0.001), respectively. Multivariate analysis showed that PSC (hazard ratio [HR], 1.65; P<.001), radiotherapy (HR, 2.24; P<0.01), ALND (HR, 1.41; P = 0.04), and nodal stage (HR, 1.93; P = 0.04) were independent risk factors for LE occurrence. For the permanent LE, PSC (HR, 1.44; P = 0.05), radiotherapy (HR, 2.79; P<0.01), ALND (HR, 1.77; P<0.01), and nodal stage (HR, 3.01; P = 0.02) showed the associations.
Conclusions: The risk factors associated with LE were advanced stage, ALND and radiotherapy. PSC was one of predictors for transients LE. However, further evaluation should be done whether it is a risk factor for permanent LE.
This research was supported by National Cancer Center Grant NCC-1210181-2 by the National Cancer Center, Republic of Korea.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P3-08-14.
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Affiliation(s)
- SY Jung
- National Cancer Center, Goyang, Republic of Korea
| | - EJ Song
- National Cancer Center, Goyang, Republic of Korea
| | - JY You
- National Cancer Center, Goyang, Republic of Korea
| | - MH Lee
- National Cancer Center, Goyang, Republic of Korea
| | - Y Kwon
- National Cancer Center, Goyang, Republic of Korea
| | - KL Ko
- National Cancer Center, Goyang, Republic of Korea
| | - IH Park
- National Cancer Center, Goyang, Republic of Korea
| | - KS Lee
- National Cancer Center, Goyang, Republic of Korea
| | - J Ro
- National Cancer Center, Goyang, Republic of Korea
| | - S Lee
- National Cancer Center, Goyang, Republic of Korea
| | - H-S Kang
- National Cancer Center, Goyang, Republic of Korea
| | - E Lee
- National Cancer Center, Goyang, Republic of Korea
| | - KH Shin
- National Cancer Center, Goyang, Republic of Korea
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21
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Lee SY, Song EJ, Kim HJ, Kang HJ, Kim JH, Lee KJ. Rac1 regulates heat shock responses by reorganization of vimentin filaments: identification using MALDI-TOF MS. Cell Death Differ 2001; 8:1093-102. [PMID: 11687887 DOI: 10.1038/sj.cdd.4400923] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2001] [Revised: 05/16/2001] [Accepted: 06/11/2001] [Indexed: 11/08/2022] Open
Abstract
Rac1 has been implicated in a wide variety of biological processes, including actin remodeling and various signaling cascades. Here we have examined whether Rac1 might be involved in heat shock-induced cell signaling. We found that Rat2 stable cells expressing a dominant negative Rac1 mutant, RacN17 (Rat2-RacN17), were significantly more tolerant to heat shock than control Rat2 cells, and simultaneously inhibited the activation of SAPK/JNK by heat shock compared to control Rat2 cells. However, no discernible effect was observed in typical heat shock responses including total protein synthesis and heat shock protein synthesis. To identify the proteins involved in this difference, we separated the proteins of both Rat2 and Rat2-RacN17 cell lines after heat shock using two-dimensional gel electrophoresis and identified the differentially expressed proteins by matrix assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF MS) after in-gel trypsin digestion. Differentially expressed proteins between two cell lines were identified as vimentin. Rat2-RacN17 cells showed significant changes in vimentin as well as marked changes in vimentin reorganization by heat shock. The vimentin changes were identified as N-terminal head domain cleavage. These results suggest that Rac1 plays a pivotal role in the heat shock-induced signaling cascade by modifying intermediate vimentin filaments.
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Affiliation(s)
- S Y Lee
- The Center for Cell Signaling Research, Division of Molecular Life Sciences and College of Pharmacy, Ewha Womans University, Seoul, 120-750, Korea
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Song EJ, Lee KJ. [Identification of proteome molecules by proteomics using two-dimensional gel electrophoresis and MALDI-TOF MS]. Exp Mol Med 2001; 33:5-18. [PMID: 11708325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023] Open
Abstract
Genomic technologies have enabled rapid accumulation of information from complex biological systems over the last two decades. The complete DNA sequence is now known for many organisms and the informational database obtained from genome sequencing projects has provided the base for the specification of proteome - the protein complement of genome. Genomic functions can be inferred from the analysis of gene structure and gene expression profiles because proteins are the functional molecules of an organism. Integrated technologies including protein separation, identification, characterization and information manage system are essential to analyze the proteins in complex cellular matrix. This study is focusing on the strategies of proteome analysis using sample preparation, 2-dimensional gel electrophoresis, processing of protein spots and identification of proteins, protein-protein interaction and posttranslational modification using MALDI-TOF-MS. 2-D gel electrophoresis is currently the most powerful protein separation technique and MALDI-TOF MS is powerful identification technique for protein and peptides as a sensitive, rapid, and high resolution analytical method. The developed integrated proteome technologies are very useful to understand the biological phenomena at molecular level by identifying the new molecules and their modifications in various cellular processes, and can be applied for biotechnology including medical science.
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Affiliation(s)
- E J Song
- College of Pharmacy and Divison of Molecular Life Sciences Ewha Womans University, Seoul, Korea
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23
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Bull LN, Roche E, Song EJ, Pedersen J, Knisely AS, van Der Hagen CB, Eiklid K, Aagenaes O, Freimer NB. Mapping of the locus for cholestasis-lymphedema syndrome (Aagenaes syndrome) to a 6.6-cM interval on chromosome 15q. Am J Hum Genet 2000; 67:994-9. [PMID: 10968776 PMCID: PMC1287903 DOI: 10.1086/303080] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2000] [Accepted: 08/11/2000] [Indexed: 12/27/2022] Open
Abstract
Patients with cholestasis-lymphedema syndrome (CLS) suffer severe neonatal cholestasis that usually lessens during early childhood and becomes episodic; they also develop chronic severe lymphedema. The genetic cause of CLS is unknown. We performed a genome screen, using DNA from eight Norwegian patients with CLS and from seven unaffected relatives, all from an extended pedigree. Regions potentially shared identical by descent in patients were further characterized in a larger set of Norwegian patients. The patients manifest extensive allele and haplotype sharing over the 6.6-cM D15S979-D15S652 region: 30 (83.3%) of 36 chromosomes of affected individuals carry a six-marker haplotype not found on any of the 32 nontransmitted parental chromosomes. All Norwegian patients with CLS are likely homozygous for the same disease mutation, inherited from a shared ancestor.
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Affiliation(s)
- L N Bull
- Liver Center Laboratory, San Francisco General Hospital, San Francisco, CA 94110, USA.
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24
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Song EJ, Kim YS, Chung JY, Kim E, Chae SK, Lee KJ. Oxidative modification of nucleoside diphosphate kinase and its identification by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Biochemistry 2000; 39:10090-7. [PMID: 10955997 DOI: 10.1021/bi000267a] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nucleoside diphosphate kinase (NDPK, Nm23) has been implicated as a multifunctional protein. However, the regulatory mechanism of NDPK is poorly understood. We have examined the modification of NDPK in oxidative stresses. We found that oxidative stresses including diamide and H(2)O(2) treatment cause disulfide cross-linking of NDPK inside cells. This cross-linking was reversible in response to mild oxidative stress, and irreversible to strong stress. This suggests that disulfide cross-linked NDPK may be a possible mechanism in the modification of cellular regulation. To confirm this idea, oxidative modification of NDPK has been performed in vitro using purified human NDPK H(2)O(2) inactivated the nucleoside diphosphate (NDP) kinase activity of NDPK by producing intermolecular disulfide bonds. Disulfide cross-linking of NDPK also dissociated the native hexameric structure into a dimeric form. The oxidation sites were identified by the analysis of tryptic peptides of oxidized NDPK, using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). Intermolecular cross-linking between Cys109-Cys109, which is highly possible based on the X-ray crystal structure of NDPK-A, and oxidations of four methionine residues were identified in H(2)O(2)-treated NDPK. This cross-linkng was confirmed using mutant C109A (NDPK-A(C109A)) which had similar enzymatic activity as a wild NDPK-A. Mutant NDPK-A(C109A) was not cross-linked and was not easily denatured by the oxidant. Therefore, enzymatic activity and the quaternary structure of NDPK appear to be regulated by cross-linking with oxidant. These findings suggest one of the regulatory mechanisms of NDPK in various cellular processes.
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Affiliation(s)
- E J Song
- Center for Cell Signaling Research, Division of Molecular Life Sciences and College of Pharmacy, Ewha Womans University, Seoul, Korea
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25
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Chan MW, Chiang CD, Song EJ, Yang VC. Effects of cytoskeletal inhibitors on the accumulation of vincristine in a resistant human lung cancer cell line with high level of polymerized tubulin. Cancer Biochem Biophys 1998; 16:347-63. [PMID: 9925282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
We have previously established a vincristine resistant human lung cancer cell line (PC-9/VCR) by a stepwise exposure of parental line PC-9 to vincristine. In this study the resistant cells showed enhanced vincristine cytotoxicity in the presence of cytochalasin B and D. The increase in cytotoxicity was associated with an enhanced accumulation and a reduced efflux of vincristine. Colchicine and taxol had no effects on vincristine accumulation. Several cytoplasmic proteins were overexpressed in the resistant cells. The two major ones, with molecular weights of 58.8 kDa and 83.2 kDa, were shown by western blotting to be beta-tubulin and actin, respectively. The polymerized tubulin level in the resistant cells was significantly (p < 0.05) higher than that in the parental cells. These results suggest that the cellular cytoskeletons might play an important role in VCR resistance in the PC-9/VCR human lung cancer cell line.
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Affiliation(s)
- M W Chan
- Department of Biology, Tunghai University, Taichung, Taiwan, ROC
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26
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Antoch MP, Song EJ, Chang AM, Vitaterna MH, Zhao Y, Wilsbacher LD, Sangoram AM, King DP, Pinto LH, Takahashi JS. Functional identification of the mouse circadian Clock gene by transgenic BAC rescue. Cell 1997; 89:655-67. [PMID: 9160756 PMCID: PMC3764491 DOI: 10.1016/s0092-8674(00)80246-9] [Citation(s) in RCA: 527] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
As a complementary approach to positional cloning, we used in vivo complementation with bacterial artificial chromosome (BAC) clones expressed in transgenic mice to identify the circadian Clock gene. A 140 kb BAC transgene completely rescued both the long period and the loss-of-rhythm phenotypes in Clock mutant mice. Analysis with overlapping BAC transgenes demonstrates that a large transcription unit spanning approximately 100,000 base pairs is the Clock gene and encodes a novel basic-helix-loop-helix-PAS domain protein. Overexpression of the Clock transgene can shorten period length beyond the wild-type range, which provides additional evidence that Clock is an integral component of the circadian pacemaking system. Taken together, these results provide a proof of principle that "cloning by rescue" is an efficient and definitive method in mice.
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Affiliation(s)
- M P Antoch
- National Science Foundation Center for Biological Timing, Department of Neurobiology and Physiology, Northwestern University, Evanston, Illinois 60208, USA
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27
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Abstract
Voltage-gated potassium channels are differentially expressed in the brain, and recent studies have shown that K+ channels show subcellular localization. We characterized the distribution of five different K+ channels in the mouse retina. Each channel was distributed in a unique pattern in the retina and was localized to specific subcellular domains within a given retinal neuron. Kv1.4 and Kv4.2 were consistently found in axonal and somatodendritic portions, respectively, consistent with previous studies in brain. In contrast, Kv1.2, Kv1.3, and Kv2.1 showed variable subcellular distribution depending upon cellular context. These results suggest that no one K+ channel is distributed over the entire length of the neuron to provide a "housekeeping" level of membrane potential stabilization. Instead, we propose that each K+ channel is associated with a specific subcellular functional module, and each local K+ conductance responds uniquely to local voltage and second messenger signals.
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Affiliation(s)
- D J Klumpp
- Department of Biochemistry, Northwestern University, Evanston, IL 60208, USA
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28
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Klumpp DJ, Song EJ, Ito S, Sheng MH, Jan LY, Pinto LH. The Shaker-like potassium channels of the mouse rod bipolar cell and their contributions to the membrane current. J Neurosci 1995; 15:5004-13. [PMID: 7623129 PMCID: PMC6577899] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
RT PCR on mRNA from enzymatically dissociated, isolated bipolar cells showed that these neurons express the Shaker-like K+ channels Kv1.1, Kv1.2, and Kv1.3. Immunohistochemical localization showed each channel to have a unique subcellular distribution: Kv1.1 immunoreactivity was detected in the dendrites and axons terminal, whereas Kv1.2 and Kv1.3 subunits were localized to the axon and the postsynaptic membrane of the rod ribbon synapse, respectively. Whole-cell patch-clamp recordings indicated that the activation voltage of the delayed rectifier current of the isolated bipolar cell and the inhibitory constants for current blockade by TEA, 4-AP, and Ba2+ were similar to these same properties measured for Kv1.1 expressed in oocytes. However, the TEA and 4-AP inhibitory constants for the bipolar cell current differed from the inhibitory constants for Kv1.2 or Kv1.3. These results suggest that the current of the isolated rod bipolar cell is most similar to Kv1.1 but that all three channels may function in the intact retina to allow complex modulation of retinal synaptic signals.
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Affiliation(s)
- D J Klumpp
- Department of Biochemistry, Molecular Biology and Cell Biology, Northwestern University, Evanston, Illinois 60208, USA
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29
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Song EJ, Yang VC, Chiang CD, Chao CC. Potentiation of growth inhibition due to vincristine by ascorbic acid in a resistant human non-small cell lung cancer cell line. Eur J Pharmacol 1995; 292:119-25. [PMID: 7720783 DOI: 10.1016/0926-6917(95)90003-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
A human cell subline (PC-9/VCR) resistant to vincristine was established from non-small cell lung cancer PC-9 cells by incremental exposure of the cells to vincristine. The resistant cells showed phenotypic resistance to vincristine (10-fold), colchicine (6.9-fold) and cisplatin (1.4-fold) but they showed sensitivity to other chemotherapeutic agents including melphalan and etoposide VP-16. The characteristics of the vincristine resistance was partially inhibited (5-7-fold) by co-treatment of PC-9/VCR cells with a nontoxic concentration of L-ascorbic acid (25 micrograms/ml). Co-treatment or 96 h pre-treatment with ascorbic acid resulted in potentiation of the vincristine effect on the resistant, but not on the sensitive, cell line. The growth inhibition due to vincristine treatment after 24 or 96 h growth in ascorbic acid-free medium was decreased in the resistant as well as in the sensitive cell line. In both cell lines, enhanced growth rate has been shown after ascorbic acid treatment. Similarly, cross-resistance of PC-9/VCR cells to colchicine could also be blocked by ascorbic acid. In addition, a nontoxic concentration of verapamil, a known multidrug resistance inhibitor, did not affect the resistant phenotype of PC-9/VCR cells. These findings suggest that an ascorbic acid-sensitive mechanism may be involved in drug resistance per se in the human lung cancer cells, which differs from the classical phosphoglycoprotein-mediated or previously reported non-phosphoglycoprotein-mediated multidrug resistance.
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Affiliation(s)
- E J Song
- Department of Biochemistry, Chang Gung Medical College, Taoyuan, Taiwan, Republic of China
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30
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Chiang CD, Song EJ, Yang VC, Chao CC. Ascorbic acid increases drug accumulation and reverses vincristine resistance of human non-small-cell lung-cancer cells. Biochem J 1994; 301 ( Pt 3):759-64. [PMID: 7914401 PMCID: PMC1137052 DOI: 10.1042/bj3010759] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A human lung-cancer PC-9 subline with acquired resistance to vincristine (VCR), a chemotherapeutic agent, was established with incremental increases of the drug. The resistant PC-9 subline (PC-9/VCR) shows a 12-fold increase in resistance to VCR and a unique cross-resistance pattern: high cross-resistance to the potent VCR analogue colchicine (6.9-fold) and vinblastine (2.5-fold); lower cross-resistance to actinomycin D (1.8-fold), cisplatin (1.2-fold) and adriamycin (1.3-fold) and a sensitivity to melphalan and VP-16 which is similar to that of the parental cell line. A reduced accumulation of VCR in the resistant cells was demonstrated. Interestingly, the VCR resistance of the PC-9/VCR cell line was partially reversed by ascorbic acid, and the drug uptake was enhanced. In contrast, ascorbic acid had no effect on drug tolerance and drug accumulation was not observed in either PC-9 parental cells or known multidrug-resistant (MDR) cells, suggesting that VCR resistance in PC-9/VCR cells results essentially from reduced drug accumulation. It is worth noting that, whereas reduced drug accumulation in the PC-9/VCR cells was susceptible to modulation by ascorbic acid, the increased efflux rate characteristic of the resistant cells was not. Further, there was a higher efflux rate in resistant cells than in parental cells. DNA Southern- and RNA Northern-blot hybridization analyses indicate that PC-9/VCR cells do not contain amplified mdr genes or overexpress P-glycoprotein. In addition, the calcium-channel blocker verapamil, which acts as a competitive inhibitor of drug binding and efflux, did not affect the resistant phenotype of PC-9/VCR cells. These findings suggest an ascorbic acid-sensitive drug uptake mechanism which is important in mediating VCR resistance per se in human lung-cancer cells; this differs from the P-glycoprotein-mediated MDR mechanism.
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Affiliation(s)
- C D Chiang
- Department of Internal Medicine, Taichung Veteran General Hospital, Taiwan, Republic of China
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31
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Song EJ, Chiang CD, Chao CC, Cheng V. [The efflux of intracellular vincristine in drug-resistant human lung cancer cells is not mediated by P-glycoprotein]. J Formos Med Assoc 1993; 92 Suppl 2:S69-75. [PMID: 7904199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
A subline (PC-9/VCR) of the human lung adenocarcinoma cell line (PC-9), derived by in vitro exposure to vincristine (VCR), exhibited a 10-12-fold resistance to VCR by MTT and HTCA assay. Compared to the parental cell line (PC-9), PC-9/VCR-resistant cells displayed a reduced accumulation of VCR. The rate of VCR efflux was shown to be enhanced by PC-9/VCR. Unlike multidrug resistance, this efflux was independent of P-glycoprotein overexpression as determined by the Northern blotting method. In addition, PC-9/VCR showed no collateral sensitivity to verapamil. This resistant subline only showed 6.9-fold and 2.5-fold cross resistance to colchicine and vinblastine, respectively. This preliminary result indicates that defective drug accumulation in PC-9/VCR is due to other mechanisms possibly involving the microtubule assembly.
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Affiliation(s)
- E J Song
- Department of Biology, Tunghai University, Taichung, Taiwan, R.O.C
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32
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Abstract
1. The neurons of the retina have electrical properties that are different from those of most of the other neurons of the central nervous system. To identify the voltage-gated ion channels found in the retina, we screened mouse retinal cDNA libraries with oligonucleotide probes homologous to the mammalian K+ channel MBK1 (Kv1.1) and ligated two partial clones to produce a full-length clone with no significant differences from MBK1. 2. Expression of MBK1 mRNA was determined by RNAse protection. MBK1 mRNA was detected in retinal RNA and was also detected in brain, liver, and heart RNAs. 3. We transcribed the full-length clone, injected it into oocytes of Xenopus laevis, and measured the membrane currents 2 to 6 days later. Depolarization from a holding voltage of -90mV induced a slowly activated outward current with a peak value as large as 20 microA. The current inactivated very slowly with a single exponential time course [mean time constant, 6.5 +/- 0.4 sec (SEM) for activation voltage of -10mV]. 4. The outward current was reduced to half-maximal by 0.42 mM tetraethylammonium, 1.1 mM 4-aminopyridine, and 3.2 mM Ba2+ but was not significantly attenuated by Co2+ (1 mM). 5. The reversal potential (measured with tail currents) changed by 53mV per decade change of [K+] from 1 to 77 mM. 6. The voltage for half-maximal activation of the conductance was -26.6mV (+/- 1.7mV), and the voltage required for an e-fold increase in conductance was 6.9mV (+/- 0.5mV). 7. Thus, the mRNA for MBK1 found in the mouse retina causes the expression of a voltage-dependent K+ current which has properties suitable for may retinal neurons.
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Affiliation(s)
- D J Klumpp
- Department of Biochemistry, Molecular Biology, and Cell Biology, Northwestern University, Evanston, Illinois 60208
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