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Zou Y, Qin C, Yang Q, Lang Y, Liu K, Yang F, Li X, Zhao Y, Zheng T, Wang M, Shi R, Yang W, Zhou Y, Chen L, Liu F. Clinical characteristics, outcomes and risk factors for mortality in hospitalized diabetes and chronic kidney disease patients after COVID-19 infection following widespread vaccination. J Endocrinol Invest 2024; 47:619-631. [PMID: 37725309 DOI: 10.1007/s40618-023-02180-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 08/17/2023] [Indexed: 09/21/2023]
Abstract
BACKGROUND COVID-19 poses a significant threat to patients with comorbidities, such as diabetes and chronic kidney disease (CKD). China experienced a nationwide COVID-19 endemic from December 2022 to January 2023, which is the first occurrence of such an outbreak following China's widespread administration of COVID-19 vaccinations. METHODS A total of 338 patients with diabetes and CKD combined with COVID-19 infection between December 7, 2022 and January 31, 2023 were included in this study. The end follow-up date was February 10, 2023. Univariate analysis and multivariate Cox analysis were used to analyze risk factors for death. RESULTS During the 50-day median follow-up period, 90 patients in the study cohort died, for a mortality rate of 26.63%. The median age of the study cohort was 74 years, with a male predominance of 74%. During hospitalization, 21% of patients had incident AKI, 17% of patients experienced stroke, and 40% of patients experienced respiratory failure. Cox proportional hazard regression showed that older age, a diagnosis of severe or critically severe COVID-19 infection, incident AKI and respiratory failure, higher level of average values of fasting glucose during hospitalization, UA, and total bilirubin were independent risk factors for death in our multivariate model. CONCLUSIONS These findings highlight the critical importance of identifying and managing comorbid risk factors for COVID-19, especially among the elderly, in order to optimize clinical outcomes, even after COVID-19 vaccination.
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Affiliation(s)
- Y Zou
- Division of Nephrology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, Sichuan Province, China
| | - C Qin
- Division of Nephrology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, Sichuan Province, China
| | - Q Yang
- Division of Nephrology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, Sichuan Province, China
| | - Y Lang
- Division of Nephrology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, Sichuan Province, China
| | - K Liu
- Division of Nephrology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, Sichuan Province, China
| | - F Yang
- Department of Clinical Medicine, Southwest Medical University, Luzhou, China
| | - X Li
- Department of Clinical Research Management, West China Hospital of Sichuan University, Chengdu, China
| | - Y Zhao
- Department of Clinical Research Management, West China Hospital of Sichuan University, Chengdu, China
| | - T Zheng
- Information Center, West China Hospital of Sichuan University, Chengdu, China
- Engineering Research Center of Medical Information Technology, Ministry of Education, Chengdu, China
| | - M Wang
- Information Center, West China Hospital of Sichuan University, Chengdu, China
- Engineering Research Center of Medical Information Technology, Ministry of Education, Chengdu, China
| | - R Shi
- Information Center, West China Hospital of Sichuan University, Chengdu, China
- Engineering Research Center of Medical Information Technology, Ministry of Education, Chengdu, China
| | - W Yang
- Division of Project Design and Statistics, West China Hospital of Sichuan University, Chengdu, China
| | - Y Zhou
- Integrated Care Management Center, West China Hospital of Sichuan University, Chengdu, China
| | - L Chen
- Department of Clinical Research Management, West China Hospital of Sichuan University, Chengdu, China
- Division of Neurology, West China Hospital of Sichuan University, Chengdu, China
| | - Fang Liu
- Division of Nephrology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, 610041, Sichuan Province, China.
- Department of Clinical Research Management, West China Hospital of Sichuan University, Chengdu, China.
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Zheng Y, Lang Y, Qi B, Li T. TSPAN4 and migrasomes in atherosclerosis regression correlated to myocardial infarction and pan-cancer progression. Cell Adh Migr 2023; 17:14-19. [PMID: 36513632 PMCID: PMC9754108 DOI: 10.1080/19336918.2022.2155337] [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: 12/15/2022] Open
Abstract
The migrasomes formation is mediated by the assembly of micron-scale tetraspanin macrodomains and the recruitment of tetraspanin 4 (TSPAN4). However, the physiological functions of TSPAN4 on migrasomes are less known. The TSPAN4 expression in macrophages in single-cell sequencing data, GEO datasets and TCGA database were determined. TSPAN4 expression was highly associated with atherosclerosis regression-related macrophages, intraplaque hemorrhage and ruptured plaques. TSPAN4 expression was upregulated in spontaneous MI and inducible MI mice model. Besides, TSPAN4 expression was highly correlated with tumor-associated macrophages. The study provided a critical role of TSPAN4 aberrant expression in the progression of atherosclerosis and pan-cancer, and the intervention of TSPAN4 and migrasomes may save dying patients' lives and improve their prognosis.
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Affiliation(s)
- Yue Zheng
- School of Medicine, Nankai University, Tianjin, Binhai, China,Department of Heart Center, the Third Central Hospital of Tianjin, Tianjin, Binhai, China,Department of Heart Center, Nankai University Affiliated Third Center Hospital, Tianjin, Binhai, China,Artificial Cell Engineering Technology Research Center, Tianjin, Binhai, China
| | - Yuheng Lang
- Department of Heart Center, the Third Central Hospital of Tianjin, Tianjin, Binhai, China,Department of Heart Center, Nankai University Affiliated Third Center Hospital, Tianjin, Binhai, China,Artificial Cell Engineering Technology Research Center, Tianjin, Binhai, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, Binhai, China
| | - Bingcai Qi
- Department of Heart Center, the Third Central Hospital of Tianjin, Tianjin, Binhai, China,Department of Heart Center, Nankai University Affiliated Third Center Hospital, Tianjin, Binhai, China,Artificial Cell Engineering Technology Research Center, Tianjin, Binhai, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, Binhai, China
| | - Tong Li
- School of Medicine, Nankai University, Tianjin, Binhai, China,Department of Heart Center, the Third Central Hospital of Tianjin, Tianjin, Binhai, China,Department of Heart Center, Nankai University Affiliated Third Center Hospital, Tianjin, Binhai, China,Artificial Cell Engineering Technology Research Center, Tianjin, Binhai, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, Binhai, China,CONTACT Tong Li School of Medicine, Nankai University, Tianjin300170, China
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Lang Y, Jiang Z, Sun L, Xiang L, Ren L. Hybrid-Supervised Deep Learning for Proton-Acoustic Reconstruction for 3D In Vivo Proton Dose Verification. Int J Radiat Oncol Biol Phys 2023; 117:e682-e683. [PMID: 37786007 DOI: 10.1016/j.ijrobp.2023.06.2145] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Proton-acoustic (PA) image has shown great potential to provide real-time 3D dose verification of proton therapy. However, the PA image quality suffers from severe limited view artifacts, which significantly impairs its accuracy for dose verification. In this study, we developed a hybrid-supervised deep learning method for PA reconstruction to address the limited-view issues. MATERIALS/METHODS Our method consists of two stages. In the first stage, a transformer-based network was proposed to reconstruct initial pressure maps from protoacoustic signals. The network was first trained using supervision by the iteratively reconstructed pressure map and then fine-tuned using transfer learning and self-supervision based on the data fidelity constraint. In the second stage, the PA image was further enhanced by a 3D U-net. The final PA images were converted to dose maps using conversion coefficients derived from CT images. Data from 126 prostate cancer patients treated by proton therapy were collected under an IRB protocol and were split into 86 and 40 patients for model training and testing, respectively. Data of each patient contains the planning CT scan, the corresponding clinical treatment plan, and the dose map calculated by commercial software. The radiofrequency signals were generated by performing proton acoustic simulation based on CT images and the ground truth pressure map derived from the treatment plan. An ultrasound detector matrix with 64 × 64 size and 500kHz central frequency was simulated under the perineum to acquire the signals in the prostate area. In the testing results, the method's accuracy was evaluated using Root-mean-squared-error (RMSE) and structural-similarity-index-measure (SSIM) between the reconstructed and ground truth pressure map and dose distribution. RESULTS Testing results showed that the reconstructed pressure map achieved an average RMSE/SSIM of 0.0292/0.96, demonstrating excellent 3D information with details. Dose maps derived from the pressure map achieved an average RMSE/SSIM of 0.018/0.99 with a gamma index of 94.7% and 95.7% for 1%/3 mm and 1%/5 mm criteria compared to the ground truth dose maps. The reconstruction time was 6s, which can be further reduced using GPU. CONCLUSION Our study achieves start-of-the-art performance in the challenging task of direct reconstruction from limited-view radiofrequency signals, demonstrating the great promise of PA imaging as a highly efficient and accurate tool for in-vivo 3D proton dose verification. Such high-precision 3D online dose verification can substantially reduce the range uncertainties of proton therapy to significantly improve its precision and outcomes.
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Affiliation(s)
- Y Lang
- Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD
| | | | - L Sun
- University of California, Irvine, CA
| | - L Xiang
- University of California, Irvine, CA
| | - L Ren
- Department of Radiation Oncology, University of Maryland School of Medicine, Baltimore, MD
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Shen H, Wang S, Zhang C, Gao W, Cui X, Zhang Q, Lang Y, Ning M, Li T. Correction: Association of hyperglycemia ratio and ventricular arrhythmia in critically ill patients admitted to the intensive care unit. BMC Cardiovasc Disord 2023; 23:260. [PMID: 37208595 DOI: 10.1186/s12872-023-03296-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/12/2023] [Indexed: 05/21/2023] Open
Affiliation(s)
- Hechen Shen
- The Third Central, Clinical College of Tianjin Medical University, Tianjin, China
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Song Wang
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Chong Zhang
- The Third Central, Clinical College of Tianjin Medical University, Tianjin, China
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Wenqing Gao
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Xiaoqiong Cui
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Qiang Zhang
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Yuheng Lang
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Meng Ning
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Tong Li
- The Third Central, Clinical College of Tianjin Medical University, Tianjin, China.
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China.
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.
- Tianjin ECMO Treatment and Training Base, Tianjin, China.
- Artificial Cell Engineering Technology Research Center, Tianjin, China.
- School of Medicine, Nankai University, Tianjin, China.
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China.
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Shen H, Wang S, Zhang C, Gao W, Cui X, Zhang Q, Lang Y, Ning M, Li T. Association of hyperglycemia ratio and ventricular arrhythmia in critically ill patients admitted to the intensive care unit. BMC Cardiovasc Disord 2023; 23:215. [PMID: 37118670 PMCID: PMC10148444 DOI: 10.1186/s12872-023-03208-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2022] [Accepted: 03/27/2023] [Indexed: 04/30/2023] Open
Abstract
INTRODUCTION The relationship between relative hyperglycemia and ventricular arrhythmia (VA) in critically ill patients admitted to intensive care units (ICU) remains unclear. This study aims to investigate the association between stress hyperglycemia ratio (SHR) and VA in this population. METHODS This retrospective and observational study analyzed data from 4324 critically ill patients admitted to the ICU, obtained from the Medical Information Mart for Intensive Care IV (MIMIC-IV) database. The SHR was calculated as the highest blood glucose level during the first 24 h of ICU admission divided by the admission blood glucose level. Based on the optimal cut-off values under the receiver operating characteristic curve, patients were stratified into high SHR (≥ 1.31) and low SHR (< 1.31) group. To investigate the impact of diabetes mellitus (DM) on the outcome, patients were stratified as low SHR/DM; low SHR/non-DM; high SHR/DM, and high SHR/non-DM. Restricted cubic spline (RCS) and logistic regression analysis were performed to analyze the relationship between SHR and VA. RESULTS A total of 4,324 critically ill patients were included in this retrospective and observational study. The incidence of VA was higher in the high SHR group. Multiple-adjusted RCS revealed a "J-shaped" correlation between SHR and VA morbidity. The logistic regression model demonstrated that high SHR was associated with VA. The high SHR/non-DM group had a higher risk of VA than other groups stratified based on SHR and DM. Subgroup analysis showed that high SHR was associated with an increased risk of VA in patients with coronary artery disease. CONCLUSION High SHR is an independent risk factor and has potential as a biomarker of higher VT/VF risk in ICU-admitted patients.
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Affiliation(s)
- Hechen Shen
- The Third Central Clinical College of Tianjin Medical University, Tianjin, China
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Song Wang
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Chong Zhang
- The Third Central Clinical College of Tianjin Medical University, Tianjin, China
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Wenqing Gao
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Xiaoqiong Cui
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Qiang Zhang
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Yuheng Lang
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Meng Ning
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Tianjin ECMO Treatment and Training Base, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China
| | - Tong Li
- The Third Central Clinical College of Tianjin Medical University, Tianjin, China.
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China.
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.
- Tianjin ECMO Treatment and Training Base, Tianjin, China.
- Artificial Cell Engineering Technology Research Center, Tianjin, China.
- School of Medicine, Nankai University, Tianjin, China.
- Nankai University Affiliated Third Center Hospital, Nankai University, Tianjin, China.
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Zheng Y, Lang Y, Qi B, Wang Y, Gao W, Li T. TSPAN4 is a prognostic and immune target in Glioblastoma multiforme. Front Mol Biosci 2023; 9:1030057. [PMID: 36685274 PMCID: PMC9853066 DOI: 10.3389/fmolb.2022.1030057] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 12/14/2022] [Indexed: 01/08/2023] Open
Abstract
Background: Atherosclerosis can impact cancer progression due to the cholesterol and calcium metabolism, illustrating the links between atherosclerosis and cancer metastasis. Tetraspanin 4 (TSPAN4) may help understand migrasomes in diseases and provide novel targets for treatment. Methods: TSPAN4 expression in atherosclerosis Gene Expression Omnibus (EO) dataset and multiple omics data were explored, such as enriched pathways analysis, protein-protein interaction analysis, immune subtypes as well as diagnostic and prognostic value in pan-cancer. The relationship between Glioblastoma multiforme (GBM) and TSPAN4 was further investigated. Results: Compared to control, TSPAN4 expression was upregulated in foam cells from patients with atherosclerosis and survival analysis demonstrated high TSPAN4 expression contributes to poor prognosis. TSPAN4 expression differs significantly in immune subtypes of cancers, which can be a diagnostic and prognostic target of cancers due to the high accuracy. Overall survival analysis of subgroups demonstrated that higher TSPAN4 expression had a worse prognosis and the univariate analysis and multivariate analysis demonstrated age, TSPAN4 expression, WHO grade, IDH status and histological types were independent risk factors of Glioblastoma multiforme. Conclusion: The TSPAN4 expression was associated with atherosclerosis progression and pan-cancer, especially in Glioblastoma multiforme and GBMLGG. Therefore, TSPAN4 may serve as a potential biomarker and the crosstalk between atherosclerosis and tumor progression. The results are not fully validated and further studies are still needed to validate in vivo and in vitro.
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Affiliation(s)
- Yue Zheng
- School of Medicine, Nankai University, Tianjin, China,Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China,Nankai University Affiliated Third Center Hospital, Tianjin, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China,Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Yuheng Lang
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China,Nankai University Affiliated Third Center Hospital, Tianjin, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China,Artificial Cell Engineering Technology Research Center, Tianjin, China,The Third Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Bingcai Qi
- Nankai University Affiliated Third Center Hospital, Tianjin, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China,Artificial Cell Engineering Technology Research Center, Tianjin, China,The Third Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Yuchao Wang
- School of Medicine, Nankai University, Tianjin, China,Nankai University Affiliated Third Center Hospital, Tianjin, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China,Artificial Cell Engineering Technology Research Center, Tianjin, China,The Third Central Clinical College of Tianjin Medical University, Tianjin, China
| | - Wenqing Gao
- Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China,Nankai University Affiliated Third Center Hospital, Tianjin, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China,Artificial Cell Engineering Technology Research Center, Tianjin, China,The Third Central Clinical College of Tianjin Medical University, Tianjin, China,*Correspondence: Wenqing Gao, ; Tong Li,
| | - Tong Li
- School of Medicine, Nankai University, Tianjin, China,Department of Heart Center, The Third Central Hospital of Tianjin, Tianjin, China,Nankai University Affiliated Third Center Hospital, Tianjin, China,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China,Artificial Cell Engineering Technology Research Center, Tianjin, China,The Third Central Clinical College of Tianjin Medical University, Tianjin, China,*Correspondence: Wenqing Gao, ; Tong Li,
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7
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Lang Y, Zheng Y, Qi B, Zheng W, Zhao C, Zhai H, Wang G, Luo Z, Li T. Case report: Novel TBX5-related pathogenic mechanism of Holt-Oram syndrome. Front Genet 2023; 14:1063202. [PMID: 36936432 PMCID: PMC10014717 DOI: 10.3389/fgene.2023.1063202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 02/10/2023] [Indexed: 03/05/2023] Open
Abstract
Introduction: Holt-Oram syndrome (HOS) is a rare genetic disorder characterized by upper limb abnormalities, congenital heart defects, and/or conduction abnormalities. Sequence alteration of T-box transcription factor 5 (TBX5) is correlated with the incidence of HOS. Case description: We present the case of a 24-year-old female with upper limb alterations (congenital dysplasia in the wrist and elbow joints) and an anomalous left main trunk arising from the right coronary sinus. The patient inherited a base T (reference C) at rs883079 from her mother and base C (reference T) at rs10850326 from her father, both of which belong to the 3'-untranslated region (UTR) of the TBX5 gene; no alterations in TBX5 expression or single-nucleotide polymorphisms (SNPs) in other exon areas were found. We explored the effects of TBX5 on cardiomyocytes using the HL-1 cell line and TBX5-knockdown cells. Discussion: Quantitative polymerase chain reaction analysis demonstrated that TEKT2, TEKT4, and SPTB expression decreased after TBX5 knockdown, while chromatin immunoprecipitation analysis further revealed that TBX5 binds to the TEKT2, TEKT4, and SPTB promoter regions to promote gene transcription. Our findings support a novel TBX5-related pathogenic mechanism in HOS.
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Affiliation(s)
- Yuheng Lang
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Yue Zheng
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Bingcai Qi
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Weifeng Zheng
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Chengxiu Zhao
- Department of Anesthesiology, Handan First Hospital, Handan, China
| | - Hu Zhai
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Gang Wang
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Zhiqiang Luo
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
| | - Tong Li
- Department of Heart Center, Tianjin Third Central Hospital, Tianjin, China
- School of Medicine, Nankai University, Tianjin, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Artificial Cell Engineering Technology Research Center, Tianjin, China
- Tianjin Institute of Hepatobiliary Disease, Tianjin, China
- *Correspondence: Tong Li,
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Qi B, Zheng Y, Gao W, Qi Z, Gong Y, Liu Y, Wang Y, Cheng X, Ning M, Lang Y, Feng J, Li T. Alpha-lipoic acid impedes myocardial ischemia-reperfusion injury, myocardial apoptosis, and oxidative stress by regulating HMGB1 expression. Eur J Pharmacol 2022; 933:175295. [PMID: 36152839 DOI: 10.1016/j.ejphar.2022.175295] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/16/2022] [Accepted: 09/16/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Inflammation, oxidative stress, and apoptosis contribute to myocardial ischemia/reperfusion injury (I/RI). Alpha-lipoic acid (ALA) plays a critical role in I/RI by impeding apoptosis and inflammation. Here, we aimed to explore the underlying mechanisms of ALA after I/RI. METHODS The left anterior descending coronary artery (LAD) was ligated, and H9c2 cells were exposed to hypoxia/reoxygenation (H/R) to establish an I/RI model. Prior to this, H9c2 cells and rats were treated using an appropriate amount of ALA. The cardiac function, inflammatory factors, and myocardial pathology were assessed in vitro. We detected cell viability, apoptosis, and oxidative stress-related factors in vivo. Moreover, proteins of the HMGB1/TLR4/NF-κB signaling pathway were detected both in vivo and in vitro. RESULTS We observed that ALA increased cell viability in vitro and decreased apoptosis in vitro and in vivo. ALA inhibited reactive oxygen species production, decreased malondialdehyde, and increased superoxide dismutase activity to resist oxidative stress in vitro. ALA also reduced the expression of inflammatory cytokines (IL-6, IL-1β, and TNF-α) in vivo. ALA also suppressed the levels of the apoptotic protein, Bax, and increased the expression of the anti-apoptotic protein Bcl-2, in vitro and in vivo. Moreover, we observed that ALA significantly inhibited the cytoplasmic localization of HMGB1, which might attenuate MI/RI or H/R via HMGB1/TLR4/NF-κB pathway. CONCLUSION ALA regulates HMGB1 translocation and attenuates I/R via the HMGB1/TLR4/NF-κB signaling pathway, thus impeding apoptosis, oxidation, and inflammation, and might be a potential target for myocardial ischemia/reperfusion injury.
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Affiliation(s)
- Bingcai Qi
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China.
| | - Yue Zheng
- Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; School of Medicine, Nankai University, Tianjin, 300071, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Wenqing Gao
- Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China.
| | - Zhenchang Qi
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Yijie Gong
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Yanwu Liu
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Yuchao Wang
- Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; School of Medicine, Nankai University, Tianjin, 300071, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Xian Cheng
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Meng Ning
- Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Yuheng Lang
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Jianyu Feng
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Tong Li
- Department of Heart Center, The Third Central Clinical College of Tianjin Medical University, Tianjin, 300170, China; Department of Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Hedong District, Tianjin, 300170, China; School of Medicine, Nankai University, Tianjin, 300071, China; Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China.
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Xiao SL, Lang Y, Li Q, Huang CL, Liu C, Wang J, Li XM. [Gd-EOB-DTPA MRI features of hepatic inflammatory pseudotumor-like follicular dendritic cell sarcoma: a case report]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:784-786. [PMID: 36038351 DOI: 10.3760/cma.j.cn501113-20200609-00300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- S L Xiao
- Department of Radiology, the First Affiliated Hospital of Army Military Medical University, Chongqing 400038, China
| | - Y Lang
- Department of Radiology, the First Affiliated Hospital of Army Military Medical University, Chongqing 400038, China
| | - Q Li
- Department of Radiology, the First Affiliated Hospital of Army Military Medical University, Chongqing 400038, China
| | - C L Huang
- Department of Radiology, the First Affiliated Hospital of Army Military Medical University, Chongqing 400038, China
| | - C Liu
- Department of Radiology, the First Affiliated Hospital of Army Military Medical University, Chongqing 400038, China
| | - J Wang
- Department of Radiology, the First Affiliated Hospital of Army Military Medical University, Chongqing 400038, China
| | - X M Li
- Department of Radiology, the First Affiliated Hospital of Army Military Medical University, Chongqing 400038, China
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Lang Y, Zheng Y, Qi B, Zheng W, Wei J, Zhao C, Gao W, Li T. Anticoagulation with nafamostat mesilate during extracorporeal life support. Int J Cardiol 2022; 366:71-79. [PMID: 35850387 DOI: 10.1016/j.ijcard.2022.07.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 11/15/2022]
Abstract
Nafamostat mesylate (NM) affects coagulation and fibrinolysis and impedes obesity-associated protein demethylase activity, which regulates Na+/K+ transport properties and the NF-κB signaling pathway. NM significantly decreases macrophage, neutrophil, and T lymphocyte infiltration, thereby reducing inflammation and apoptosis after reperfusion and promoting recovery in patients with severe conditions such as near-fatal asthma and cardiac arrest. Extracorporeal life support (ECLS) devices are used for cardiac and/or pulmonary support as a bridge to recovery, decision, surgery, or transplant in patients with refractory cardio-circulatory or respiratory diseases and provide essential opportunities for organ support and patient survival. However, they can lead to some potential adverse events such as hemorrhage and thrombosis. NM provides a sustained innate immune response of coagulation and anti-inflammation in extracorporeal circuits, principally due to its activation of the contact and complement systems. Heparin is the main anticoagulant used in extracorporeal circuits; however, it may cause massive bleeding and heparin-induced thrombocytopenia. Although no antidote is available, NM has a very short half-life of approximately 8-10 min and might have positive effects on patients who require coagulation and anti-inflammation. NM has been used for anticoagulation in continuous renal replacement therapy, extracorporeal membrane oxygenation, hemodialysis, and left ventricular assist devices. In this review, we focused on the pharmacology, monitoring parameters, and considerations for the special use of NM in patients receiving ECLS. Our findings suggest that systemic anticoagulation with NM during ECLS might be a feasible and safe alternative with several advantages for critically ill patients with high-risk bleeding and might improve their prognosis.
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Affiliation(s)
- Yuheng Lang
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; Department of Heart Center, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Yue Zheng
- School of Medicine, Nankai University, Tianjin 300071, China; Department of Heart Center, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Bingcai Qi
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; Department of Heart Center, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Weifeng Zheng
- Department of Heart Center, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Jin Wei
- Department of General practice, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China
| | - Chengxiu Zhao
- Department of Anesthesiology,Handan First Hospital,24Congtai Road,Handan 056002, China
| | - Wenqing Gao
- Department of Heart Center, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China
| | - Tong Li
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China; School of Medicine, Nankai University, Tianjin 300071, China; Department of Heart Center, The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China; Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China; Artificial Cell Engineering Technology Research Center, Tianjin, China.
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11
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Zheng Y, Lang Y, Qi Z, Qi B, Gao W, Hu X, Li T. Macrophage-Related Genes Biomarkers in Left Ventricular Remodeling Induced by Heart Failure. Rev Cardiovasc Med 2022; 23:109. [DOI: 10.31083/j.rcm2303109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 12/19/2021] [Accepted: 12/29/2021] [Indexed: 11/06/2022] Open
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Xie D, Li Y, Ma S, Yang X, Mei Y, Peng L, Lang Y, Chen A, Huang B, Chen Y, Huang X, Qian CN. FLASH Mechanisms Track (Oral Presentations) BIOLOGICAL EFFECT OF MURINE VENTRAL SKIN IRRADIATION WITH PULSED FLASH RADIOTHERAPY USING A CLINICAL LINAC. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)01464-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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13
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Hu X, Wu P, Liu B, Lang Y, Li T. RNA-binding protein CELF1 promotes cardiac hypertrophy via interaction with PEBP1 in cardiomyocytes. Cell Tissue Res 2021; 387:111-121. [PMID: 34669021 DOI: 10.1007/s00441-021-03541-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Accepted: 10/07/2021] [Indexed: 01/17/2023]
Abstract
Cardiac hypertrophy is considered as a common pathophysiological process in various cardiovascular diseases. CUG triplet repeat-binding protein 1 (CELF1) is an RNA-binding protein that has been shown to be an important post-transcription regulator and involved in several types of cancer, whereas its role in cardiac remodeling remains unclear. Herein, we found that the expression of CELF1 was significantly increased in pressure overload-induced hypertrophic hearts and angiotensin II (Ang II)-induced neonatal cardiomyocytes. Based on transverse aortic constriction-induced cardiac hypertrophy model, CELF1 deficiency markedly ameliorated cardiac hypertrophy, cardiac fibrosis, oxidative stress, and apoptosis. Accordingly, CELF1 deficiency alleviated the production of reactive oxygen species (ROS) and apoptosis of neonatal cardiomyocytes via inhibition of Raf1, TAK1, ERK1/2, and p38 phosphorylation. Mechanistically, depletion or overexpression of CELF1 negatively regulated the protein expression of phosphatidylethanolamine-binding protein 1 (PEBP1), while the mRNA expression of PEBP1 remained unchanged. RNA immunoprecipitation revealed that CELF1 directly interacted with PEBP1 mRNA. Biotin pull-down analysis and dual-luciferase assay showed that CELF1 directly bound to the fragment 1 within 3'UTR of PEBP1. Moreover, knockdown of PEBP1 partially enhanced the production of ROS and apoptosis of neonatal cardiomyocytes inhibited by CELF1 deficiency. In conclusion, CELF1 binds to the 3'UTR of PEBP1 and acts as an endogenous activator of MAPK signaling pathway. Inhibition of CELF1 attenuates pathological cardiac hypertrophy, oxidative stress, and apoptosis, thus could be a potential therapeutic strategy of pathological cardiac hypertrophy.
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Affiliation(s)
- Xiaomin Hu
- Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Tianjin, 300170, China
| | - Peng Wu
- Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Tianjin, 300170, China
| | - Bojiang Liu
- Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Tianjin, 300170, China
| | - Yuheng Lang
- Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Tianjin, 300170, China
| | - Tong Li
- Heart Center, Tianjin Third Central Hospital, 83 Jintang Road, Tianjin, 300170, China.
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14
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Li ZQ, Ran LC, Lang Y, Wu T, Chen YL, Chen BS. Preparation and Photo-Oxidation Aging Behavior of Oriented Polylactic Acid. INT POLYM PROC 2021. [DOI: 10.1515/ipp-2020-4036] [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: 11/15/2022]
Abstract
Abstract
This study employed solid hot stretching technology to produce successfully specifically oriented polylactic acid (PLA) while investigating the impact of orientation structure on its photo-oxidation aging properties. After orientation, the molecular weight and mechanical properties retention rate of PLA were improved, and the crystallinity (Xc) increased in conjunction with prolonged aging time, while the molecular orientation failed to modify the mechanism responsible for PLA deterioration. Furthermore, an examination regarding the way in which the photo-oxidation stability of PLA was enhanced, demonstrated that the increased Xc and structural orientation were beneficial for delaying the photo-oxidation aging of PLA.
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Affiliation(s)
- Z.-Q. Li
- School of Material Science and Engineering of Xihua University , Chengdu , PRC
| | - L.-C. Ran
- School of Material Science and Engineering of Xihua University , Chengdu , PRC
| | - Y. Lang
- Department of Orthopedics, People’s Hospital of Deyang City , Deyang , PRC
| | - T. Wu
- School of Material Science and Engineering of Xihua University , Chengdu , PRC
| | - Y. L. Chen
- School of Material Science and Engineering of Xihua University , Chengdu , PRC
| | - B. S. Chen
- School of Material Science and Engineering of Xihua University , Chengdu , PRC
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Li Y, Yang J, Feng Q, Li SQ, Lang Y, Zhang XF, Ye C. High cyclic tensile stress disrupts the extracellular matrix in human chondrocyte by F-actin cytoskeletal polymerization and reactive oxygen species production. J BIOL REG HOMEOS AG 2021; 35:965-974. [PMID: 34080409 DOI: 10.23812/21-105-a] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study aims to explore the mechanism of cyclic tensile stress (CTS) on human chondrocytes (CHs) relating to the reactive oxygen species (ROS) generation and extracellular matrix (ECM) stability in vitro. A well-established CTS model with 5%, 10%, or 20% elongation was performed for CHs stretching. After CTS, the cell viability, total ROS level, main ECM components, matrix metalloproteinase (MMP), tissue inhibitor of metalloproteinase (TIMP), F-actin density, and some anti-oxidative enzymes were analyzed. Additionally, the antioxidant N-acetylcysteine (NAC) and cytochalasin D were used to suppress the ROS production and F-actin polymerization when the CHs underwent CTS, respectively. The treatment of 20% elongation-CST significantly decreased the CH viability and the expressions of collagen II, aggrecan, anti-oxidative enzymes and TIMP3/4, however, it increased the ROS accumulation, F-actin polymerization, and the expression of collagen I and MMP3/13. In contrast, the application of NAC and cytochalasin D could partly rescue the CHs from the injury caused by the high CTS. Therefore, high CTS disrupts the ECM by remodeling the F-actin cytoskeleton and promoting ROS production. Cytochalasin D and NAC are effective in rejecting F-actin cytoskeleton polymerization, and ROS accumulation through a potential synergetic process, which alleviates the ECM injury caused by High CTS.
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Affiliation(s)
- Y Li
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - J Yang
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Q Feng
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - S Q Li
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Y Lang
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - X F Zhang
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - C Ye
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
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Chu F, Shi M, Lang Y, Chao Z, Jin T, Cui L, Zhu J. Adoptive transfer of immunomodulatory M2 macrophages suppresses experimental autoimmune encephalomyelitis in C57BL/6 mice via blockading NF-κB pathway. Clin Exp Immunol 2021; 204:199-211. [PMID: 33426702 DOI: 10.1111/cei.13572] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Revised: 12/17/2020] [Accepted: 12/21/2020] [Indexed: 12/16/2022] Open
Abstract
Macrophages play important roles in multiple sclerosis (MS) and experimental autoimmune encephalomyelitis (EAE), and M2 macrophage may have anti-inflammatory effects. In this study, we elucidated the roles of M1 and M2 macrophages in the pathogenesis of EAE and the effects of treatment with M2 macrophages that target certain proinflammatory cytokines and with immunomodulatory preparations that beneficially influence the disease course. We found macrophages increased at the onset of clinical signs in the EAE group, consistent with an increased proportion of M1 macrophages and low numbers of M2 macrophages. As the disease progressed and the symptoms worsened, M1 macrophages decreased and M2 macrophages gradually increased until the peak. In the recovery stage, M2 macrophages gradually decreased. Treatment with M2 macrophages inhibited the nuclear factor kappa B (NF-κB) pathway, alleviated the symptoms of EAE, reduced inflammatory cell infiltration and demyelination in the central nervous system and decreased the numbers of macrophages in the spleens. BAY-11-7082, an NF-κB blocking agent, could reduce the total number of macrophages both in vivo and in vitro, effectively prevented EAE development and significantly inhibited EAE symptoms in mice. Our study demonstrates that macrophages may play a crucial role in the pathogenesis of EAE, while M2 macrophages have anti-inflammatory effects. Transfer of M2 macrophages to EAE mice can block the NF-κB pathway successfully and relieve EAE symptoms. Application of NF-κB blockers is useful in the prevention and treatment of EAE.
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Affiliation(s)
- F Chu
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin Province, China.,Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Karolinska University Hospital Solna, Stockholm, Sweden
| | - M Shi
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin Province, China.,Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Karolinska University Hospital Solna, Stockholm, Sweden
| | - Y Lang
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - Z Chao
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - T Jin
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - L Cui
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin Province, China
| | - J Zhu
- Department of Neurology and Neuroscience Center, The First Hospital of Jilin University, Changchun, Jilin Province, China.,Division of Neurogeriatrics, Department of Neurobiology, Care Sciences and Society, Karolinska Institutet, Karolinska University Hospital Solna, Stockholm, Sweden
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Zheng Y, Lang Y, Qi Z, Gao W, Hu X, Li T. PIK3R1, SPNB2, and CRYAB as Potential Biomarkers for Patients with Diabetes and Developing Acute Myocardial Infarction. Int J Endocrinol 2021; 2021:2267736. [PMID: 34887920 PMCID: PMC8651423 DOI: 10.1155/2021/2267736] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 10/20/2021] [Accepted: 11/12/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Young patients with type 2 diabetes mellitus (DM) and acute myocardial infarction (AMI) have high long-term all-cause and cardiovascular mortality rates. We aimed to investigate the differentially expressed genes (DEGs) that might be potential targets for DM patients with AMI. METHODS Gene datasets GSE775, GSE19322, and GSE97494 were meta-analyzed to obtain DEGs of the left ventricle myocardium in infarcted mice. Gene datasets including GSE3313, GSE10617, and GSE136948 were meta-analyzed to identify DEGs in diabetes mice. A Venn diagram was used to obtain the overlapping DEGs. KEGG and GO pathway analyses were performed, and hub genes were obtained. Pivotal miRNAs were predicted and validated using the miRNA dataset in GSE114695. To investigate the cardiac function of the screened genes, a MI mouse model was constructed; echocardiogram, qPCR, and ELISA of hub genes were performed; ELISA of hub genes in human blood samples was also utilized. RESULTS A total of 67 DEGs were identified, which may be potential biomarkers for patients with DM and AMI. GO and KEGG pathway analyses were performed, which were mainly enriched in response to organic cyclic compound and PI3K-Akt signaling pathway. The expression of PIK3R1 and SPNB2 increased in the MI group and was negatively correlated to left ventricular ejection fraction (LVEF), whereas that of CRYAB decreased and was positively correlated to LVEF. Patients with high CRYAB expression demonstrated a short hospital stay and the area under the curves of the three protein levels before and after treatment were 0.964, 0.982, and 0.918, suggesting that PIK3R1, SPNB2, and CRYAB may be diagnostic and prognostic biomarkers for the diabetes patients with AMI. CONCLUSION The screened hub genes, PIK3R1, SPNB2, and CRYAB, were validated as credible molecular biomarkers and may provide a novel therapy for diabetic cardiac diseases with increased proteotoxic stress.
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Affiliation(s)
- Yue Zheng
- School of Medicine, Nankai University, Tianjin 300071, China
- Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China
- The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
| | - Yuheng Lang
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China
- The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Institute of Hepatobiliary Disease, Tianjin, China
| | - Zhenchang Qi
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China
- The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Institute of Hepatobiliary Disease, Tianjin, China
| | - Wenqing Gao
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China
- The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Institute of Hepatobiliary Disease, Tianjin, China
| | - Xiaomin Hu
- Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China
- The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Institute of Hepatobiliary Disease, Tianjin, China
| | - Tong Li
- School of Medicine, Nankai University, Tianjin 300071, China
- Nankai University Affiliated Third Center Hospital, No. 83, Jintang Road, Hedong District, Tianjin 300170, China
- The Third Central Clinical College of Tianjin Medical University, Tianjin 300170, China
- The Third Central Hospital of Tianjin, 83 Jintang Road, Hedong District, Tianjin 300170, China
- Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China
- Institute of Hepatobiliary Disease, Tianjin, China
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18
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Lang Y, Zheng Y, Li T. The treatment of extracorporeal organ support for critical ill patients with coronavirus disease 2019: A brief perspective from the front line. Artif Organs 2020; 45:189-190. [PMID: 32839961 PMCID: PMC7461011 DOI: 10.1111/aor.13785] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 07/16/2020] [Accepted: 07/17/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Yuheng Lang
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, China.,Artificial Cell Engineering Technology Research Center, Tianjin, China.,Institute of Hepatobiliary Disease, Tianjin Third Central Hospital, Tianjin, China
| | - Yue Zheng
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, China.,Artificial Cell Engineering Technology Research Center, Tianjin, China.,Institute of Hepatobiliary Disease, Tianjin Third Central Hospital, Tianjin, China.,Department of Cardiology, Nankai University Affiliated Third Center Hospital, Tianjin, China
| | - Tong Li
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, China.,Artificial Cell Engineering Technology Research Center, Tianjin, China.,Institute of Hepatobiliary Disease, Tianjin Third Central Hospital, Tianjin, China.,Department of Cardiology, Nankai University Affiliated Third Center Hospital, Tianjin, China
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19
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Lang Y, Zheng Y, Hu X, Xu L, Luo Z, Duan D, Wu P, Huang L, Gao W, Ma Q, Ning M, Li T. Extracorporeal membrane oxygenation for near fatal asthma with sudden cardiac arrest. J Asthma 2020; 58:1216-1220. [PMID: 32543251 DOI: 10.1080/02770903.2020.1781164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
INTRODUCTION Near fatal asthma is a life-threatening disorder that requires mechanical ventilation. Near fatal asthma and COPD with sudden cardiac arrest can worsen the outcomes. Previous studies demonstrated that ECMO is a live-saving measure for near fatal asthma that does not respond to traditional treatment. CASE STUDY A patient with near fatal asthma (NFA) and COPD presented with high airway resistance, life-threatening acidemia and severe hypoxemia that failed to respond to conventional therapy. His hospital course was complicated by sudden cardiac arrest when preparing to initiate V-V mode extracorporeal membrane oxygenation (ECMO). The mode immediately changed from V-V to V-A, then to V-AV and finally to V-V mode in order to improve cardiac function and promote recovery of lung function. RESULTS On the sixth day, ECMO was removed and on the ninth day, he was extubated and transferred to the ward. Finally, the patient was discharged home on the nineteenth day after admission to be followed up in the pulmonary clinic. CONCLUSIONS The early application of ECMO and mode changing plausibly resulted in dramatic improvement in gas exchange and restoration of cardiac function. This case illustrates the critical role of ECMO mode changing as salvage therapy in NFA and COPD with sudden cardiac arrest.
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Affiliation(s)
- Yuheng Lang
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Yue Zheng
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Xiaomin Hu
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Lei Xu
- Department of Critical Care Medicine, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Zhiqiang Luo
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Dawei Duan
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Peng Wu
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Lei Huang
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Wenqing Gao
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Qunxing Ma
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Meng Ning
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
| | - Tong Li
- Department of Heart Centre, Tianjin Third Central Hospital, Tianjin, P.R. China.,Tianjin Key Laboratory of Extracorporeal Life Support for Critical Diseases, Tianjin, P.R. China.,Key Laboratory of Artificial Cell, Tianjin Third Central Hospital, Tianjin, P.R. China.,Artificial Cell Engineering Technology Research Center, Tianjin, P.R. China
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20
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Hu X, Liu B, Wu P, Lang Y, Li T. LncRNA Oprm1 overexpression attenuates myocardial ischemia/reperfusion injury by increasing endogenous hydrogen sulfide via Oprm1/miR-30b-5p/CSE axis. Life Sci 2020; 254:117699. [PMID: 32437793 DOI: 10.1016/j.lfs.2020.117699] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/13/2020] [Accepted: 04/17/2020] [Indexed: 12/21/2022]
Abstract
AIMS Ischemia/reperfusion (I/R) injury largely limits the efficacy of revascularization in acute myocardial infarction. Long noncoding RNA (lncRNA) Oprm1 is protective in cerebral I/R injury. This study aimed to investigate the effect of lncRNA Oprm1 on myocardial I/R injury and its mechanism. MAIN METHODS We ligated and then released the left anterior descending coronary artery of adult male rats to build the I/R model in vivo. At the same time, an H9c2 cardiomyocytes hypoxia-reoxygenation (H/R) model was also used. Myocardial infarction area, cardiac function, histology, TUNEL staining, cell viability, and vital protein expression was conducted and compared. KEY FINDINGS LncRNA Oprm1 was significantly down-regulated in the I/R injury model. When administered with the AAV9-Oprm1 vector, the myocardial injury and cardiac function were mitigated and preserved, with apoptosis reduced. The cystathionine-γ-lyase (CSE) expression and hydrogen sulfide (H2S) expression were increased. The dual-luciferase reporter gene revealed the targeted relationship between lncRNA Oprm1 and miR-30b-5p. In H9c2 cardiomyocytes models, the miR-30b-5p blocked the protective effect of lncRNA Oprm1 on H/R injury, when Bcl-2, Bcl-xl was down-regulated, and HIF-1α, Bnip-3, Caspase-3, and Caspase-9 up-regulated. SIGNIFICANCE LncRNA Oprm1can competitively combines with miR-30b-5p, which down-regulates the expression of CSE. When administered with lncRNA Oprm1, increased endogenous H2S can reduce apoptosis and protect the myocardium from I/R injury via activating PI3K/Akt pathway and inhibiting HIF1-α activity.
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Affiliation(s)
- Xiaomin Hu
- The Heart Center of Tianjin Third Central Hospital, Tianjin 300170, China
| | - Bojiang Liu
- The Heart Center of Tianjin Third Central Hospital, Tianjin 300170, China
| | - Peng Wu
- The Heart Center of Tianjin Third Central Hospital, Tianjin 300170, China
| | - Yuheng Lang
- The Heart Center of Tianjin Third Central Hospital, Tianjin 300170, China
| | - Tong Li
- The Heart Center of Tianjin Third Central Hospital, Tianjin 300170, China.
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21
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Lang Y, Guo ZB, Wang XG, Li B. Erratum: Avalanches triggered by Kelvin-Helmholtz instability in a cylindrical plasma device [Phys. Rev. E 100, 033212 (2019)]. Phys Rev E 2020; 101:039902. [PMID: 32289887 DOI: 10.1103/physreve.101.039902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 02/20/2020] [Indexed: 06/11/2023]
Abstract
This corrects the article DOI: 10.1103/PhysRevE.100.033212.
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22
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Zhu L, Xiao R, Zhang X, Lang Y, Liu F, Yu Z, Zhang J, Su Y, Lu Y, Wang T, Luo S, Wang J, Liu ML, Dupuis J, Jing ZC, Li T, Xiong W, Hu Q. Spermine on Endothelial Extracellular Vesicles Mediates Smoking-Induced Pulmonary Hypertension Partially Through Calcium-Sensing Receptor. Arterioscler Thromb Vasc Biol 2020; 39:482-495. [PMID: 30626206 DOI: 10.1161/atvbaha.118.312280] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Objective- This study aims to determine whether and how the enriched metabolites of endothelial extracellular vesicles (eEVs) are critical for cigarette smoke-induced direct injury of endothelial cells and the development of pulmonary hypertension, rarely explored in contrast to long-investigated mechanisms secondary to chronic hypoxemia. Approach and Results- Metabonomic screen of eEVs from cigarette-smoking human subjects reveals prominent elevation of spermine-a polyamine metabolite with potent agonist activity for the extracellular CaSR (calcium-sensing receptor). CaSR inhibition with the negative allosteric modulator Calhex231 or CaSR knockdown attenuates cigarette smoke-induced pulmonary hypertension in rats without emphysematous changes in lungs or chronic hypoxemia. Cigarette smoke exposure increases the generation of spermine-positive eEVs and their spermine content. Immunocytochemical staining and immunogold electron microscopy recognize the spermine enrichment not only within the cytosol but also on the outer surface of eEV membrane. The repression of spermine synthesis, the inhibitory analog of spermine, N1-dansyl-spermine, Calhex231, or CaSR knockdown profoundly suppresses eEV exposure-mobilized cytosolic calcium signaling, pulmonary artery constriction, and smooth muscle cell proliferation. Confocal imaging of immunohistochemical staining demonstrates the migration of spermine-positive eEVs from endothelium into smooth muscle cells in pulmonary arteries of cigarette smoke-exposed rats. The repression of spermine synthesis or CaSR knockout results in attenuated development of pulmonary hypertension induced by an intravascular administration of eEVs. Conclusions- Cigarette smoke enhances eEV generation with spermine enrichment at their outer surface and cytosol, which activates CaSR and subsequently causes smooth muscle cell constriction and proliferation, therefore, directly leading to the development of pulmonary hypertension.
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Affiliation(s)
- Liping Zhu
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
| | - Rui Xiao
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
| | - Xiuyun Zhang
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
| | - Yuheng Lang
- Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.).,Department of Pathology and Department of Respiratory and Critical Care Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China (Y.L., T.W., W.X.)
| | - Fangbo Liu
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
| | - Zhe Yu
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
| | - Jiwei Zhang
- Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.).,Department of Pathology and Department of Respiratory and Critical Care Medicine, Union Hospital (J.Z., Y.S.)
| | - Yuan Su
- Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.).,Department of Pathology and Department of Respiratory and Critical Care Medicine, Union Hospital (J.Z., Y.S.)
| | - Yankai Lu
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
| | - Tao Wang
- Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.).,Department of Pathology and Department of Respiratory and Critical Care Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China (Y.L., T.W., W.X.)
| | - Shengquan Luo
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
| | - Jian Wang
- State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, China (J.W.)
| | - Ming-Lin Liu
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, Philadelphia (M.-L.L.).,Philadelphia Veterans Administration Medical Center (M.-L.L.)
| | - Jocelyn Dupuis
- Montreal Heart Institute, Québec, Canada (J.D.).,Department of medicine, Université de Montréal, Québec, Canada (J.D.)
| | - Zhi-Cheng Jing
- State Key Laboratory of Cardiovascular Disease, Fu Wai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing (Z.-C.J.)
| | - Tong Li
- Department of Heart Centre and Artificial Cell Engineering Technology Research Center of Public Health Ministry, Third Central Clinical College, Tianjin Medical University, China (T.L.)
| | - Weining Xiong
- Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.).,Department of Pathology and Department of Respiratory and Critical Care Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China (Y.L., T.W., W.X.)
| | - Qinghua Hu
- From the Department of Pathophysiology, School of Basic Medicine (L.Z., R.X., X.Z., Y.L., F.L., Z.Y., S.L., Q.H.).,Key Laboratory of Pulmonary Diseases of Ministry of Health (L.Z., R.X., X.Z., Y.Lang, F.L., Z.Y., J.Z., Y.S., Y.Lu, T.W., S.L., W.X., Q.H.)
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23
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Lang Y, Sun Q, Zhu LM, Qiu XD, Hu BS, Yang J, Zhang JD. MiR-25 overexpression promotes fracture healing by activating the Wnt signaling pathway. Eur Rev Med Pharmacol Sci 2019; 23:7200-7208. [PMID: 31539106 DOI: 10.26355/eurrev_201909_18821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To study the mechanism of micro-ribonucleic acid (miR)-25 in regulating the fracture healing in rats. MATERIALS AND METHODS A total of 45 male Sprague-Dawley (SD) rats were selected and randomly divided into group A [Phosphate Buffered Saline (PBS), n=15], group B (mimics NC, n=15) and group C (miR-25 mimics, n=15). The fracture model in rats was established via operation in all groups. From 1 d after the successful modeling, 50 μL (2 nmoL) of PBS was intraperitoneally injected into rats in group A, an equal amount of mimics NC was injected into rats in group B, and an equal amount of miR-25 mimics was injected into rats in group C. The above agents were injected once a week for consecutive 6 weeks. Fracture healing in rats was evaluated via X-ray imaging. At the same time, miR-25 expression in the three groups was detected via Reverse Transcription-Polymerase Chain Reaction (RT-PCR). Protein expressions of β-catenin, proliferating cell nuclear antigen (PCNA) and bone morphogenetic protein-2 (BMP-2) in the three groups were detected via Western blotting. The OCN-, PCNA- and BMP-2-positive osteoblasts in the three groups were detected via immunohistochemical staining and were further quantified. Moreover, the biomechanical properties of femoral fracture healing in the three groups were analyzed via the 4-point bending flexural test. RESULTS The X-ray examination of the femoral fracture healing at postoperative 1 and 7 weeks revealed that the fracture line disappeared, and both callus formation and fracture healing were good in miR-25 mimics group. In PBS group and mimics NC group, a few fracture lines could be observed, and both callus formation and fracture healing were poor. RT-PCR data showed that the expression level of miR-25 significantly increased in the miR-25 mimics group compared with that in the other two groups, and the differences were statistically significant (p<0.01). Western blotting analyses showed upregulated levels of β-catenin, PCNA and BMP-2 in the miR-25 mimics group compared with those in the control group, and the differences were statistically significant (p<0.01). Immunohistochemical staining manifested that the numbers of OCN-, PCNA- and BMP-2-positive osteoblasts in miR-25 mimics group markedly increased compared with that in the other two groups (p<0.01), suggesting that osteoblast differentiation in miR-25 mimics group was affected. The above immunohistochemical results indicated that the osteoblast differentiation at the fracture end in miR-25 mimics group was markedly enhanced compared with that in control groups. The results of the biomechanical test of femur specimens at 7 weeks after operation showed that in miR-25 mimics group, the maximum load, fracture energy and stiffness increased by 188%, 333% and 90%, respectively, compared with those in the PBS group (p<0.01). It is indicated that miR-25 promoted the mechanical properties of fracture healing. CONCLUSIONS The overexpression of miR-25 in the fracture in rats promotes fracture healing by activating the Wnt signaling pathway.
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Affiliation(s)
- Y Lang
- Department of Orthopaedic Surgery, Fuyang Orthopaedics and Traumatology Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China.
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24
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Lang Y, Guo ZB, Wang XG, Li B. Avalanches triggered by Kelvin-Helmholtz instability in a cylindrical plasma device. Phys Rev E 2019; 100:033212. [PMID: 31640003 DOI: 10.1103/physreve.100.033212] [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] [Received: 06/13/2019] [Indexed: 06/10/2023]
Abstract
A profile-evolving simulation of the Controlled Shear Decorrelation Experiment (CSDX) linear device is performed with our newly developed code. The simulation result shows an excellent agreement with the experimental observations of profiles and fluctuations of plasma density and electric potential in the B=1000 G standard discharges, suggesting the mechanism of their evolutions. According to our simulation, an avalanche of plasma density, featuring a rapid destruction of particle profile, is triggered every time the dominant instability transits from near adiabatic collisional drift wave to non-adiabatic Kelvin-Helmholtz instability. The avalanches always start at the point where the local vorticity is the maximum among the whole device. A critical vorticity is found for any avalanche to happen. The avalanches always lead to intermittent particle and heat convective structures outside the main plasma column, and these structures are ejected out as avaloids when zonal flow intensity at birth time is weak.
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Affiliation(s)
- Y Lang
- Fusion Simulation Center, School of Physics, Peking University, Beijing 100871, China
| | - Z B Guo
- Fusion Simulation Center, School of Physics, Peking University, Beijing 100871, China
| | - X G Wang
- Fusion Simulation Center, School of Physics, Peking University, Beijing 100871, China
| | - B Li
- School of Physics, Beihang University, Beijing 100191, China
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25
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Feagan BG, Sandborn W, Gasink C, Chan D, Lang Y, Pollack P, Hanauer S, Wolf D, Jacobstein D, Johanns J, Szapary P, Rutgeerts P. A80 ENDOSCOPIC HEALING WITH USTEKINUMAB IN CROHN’S DISEASE: THE UNITI ENDOSCOPY SUB-STUDY. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- B G Feagan
- Robarts Clinical Trials Inc, London, ON, Canada
| | - W Sandborn
- University of California San Diego, La Jolla, CA
| | - C Gasink
- Janssen Research & Development, LLC, Spring House, PA
| | - D Chan
- Janssen Research & Development, LLC, Spring House, PA
| | - Y Lang
- Janssen Research & Development, LLC, Spring House, PA
| | - P Pollack
- Janssen Research & Development, LLC, Spring House, PA
| | | | - D Wolf
- Atlanta Gastroenterology Associates, Atlanta, GA
| | - D Jacobstein
- Janssen Research & Development, LLC, Spring House, PA
| | - J Johanns
- Janssen Research & Development, LLC, Spring House, PA
| | - P Szapary
- Janssen Research & Development, LLC, Spring House, PA
| | - P Rutgeerts
- University Hospital Gasthuisberg, Leuven, Belgium
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Sands BE, Gasink C, Jacobstein D, Ott E, Lang Y, Ramachandran P, Ghosh S. A106 SAFETY OF USTEKINUMAB WITH AND WITHOUT CONCOMITANT CORTICOSTEROIDS OR IMMUNOSUPPRESSANTS IN PATIENTS WITH MODERATELY-TO-SEVERELY ACTIVE CROHN’S DISEASE. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- B E Sands
- Icahn School of Medicine at Mount Sinai, New York, NY
| | - C Gasink
- Janssen Scientific Affairs, LLC, Horsham, PA
| | - D Jacobstein
- Janssen Research & Development, LLC, Spring House, PA
| | - E Ott
- Janssen Research & Development, LLC, Spring House, PA
| | - Y Lang
- Janssen Research & Development, LLC, Spring House, PA
| | | | - S Ghosh
- Gastrointestinal Section, Imperial College london, London, United Kingdom
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Feagan BG, Sands BE, de Villiers W, Ott E, Gasink C, Lang Y, Szapary P, Jacobstein D, Ghosh S. A81 POOLED SAFETY ANALYSIS FROM THE USTEKINUMAB CROHN’S DISEASE AND PSORIATIC DISEASES PHASE 2 AND 3 TRIALS. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy008.082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- B G Feagan
- Robarts Clinical Trials Inc, London, ON, Canada
| | - B E Sands
- Icahn School of Medicine at Mt Sinai, New York, NY
| | | | - E Ott
- Janssen Research & Development, LLC, Spring House, PA
| | - C Gasink
- Janssen Research & Development, LLC, Spring House, PA
| | - Y Lang
- Janssen Research & Development, LLC, Spring House, PA
| | - P Szapary
- Janssen Research & Development, LLC, Spring House, PA
| | - D Jacobstein
- Janssen Research & Development, LLC, Spring House, PA
| | - S Ghosh
- Gastrointestinal Section, Imperial College london, London, United Kingdom
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Dong D, Zheng W, Jiao L, Lang Y, Zhao X. Chinese vinegar classification via volatiles using long-optical-path infrared spectroscopy and chemometrics. Food Chem 2016; 194:95-100. [DOI: 10.1016/j.foodchem.2015.08.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 07/18/2015] [Accepted: 08/02/2015] [Indexed: 11/15/2022]
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Abstract
UNLABELLED This meta-analysis revealed that diabetic adults had a twofold greater risk of hip fractures compared with non-diabetic populations, and this association was more pronounced in type 1 diabetes. INTRODUCTION The relationship between diabetes mellitus and risk of hip fracture yielded conflicting results. We conducted a meta-analysis to investigate the association between diabetes mellitus and the risk of hip fractures based on observational studies. METHODS We conducted a systematic literature search of PubMed and Embase databases through May 2015. We selected cohort and case-control studies providing at least age-adjusted risk ratio (RR) and corresponding 95 % confidence intervals (CI) of hip fractures among diabetic and non-diabetic subjects. Moreover, we pooled the female-to-male RR of hip fractures from studies that reported gender-specific risk estimate in a single study. RESULTS Twenty-one studies involving 82,293 hip fracture events among 6,995,272 participants were identified. Diabetes mellitus was associated with an increased risk of hip fractures (RR 2.07; 95 % CI 1.83-2.33) in a random effects model. Subgroup analysis indicated that excess risk of hip fracture was more pronounced in type 1 diabetes (RR 5.76; 95 % CI 3.66-9.07) than that in type 2 diabetes (RR 1.34; 95 % CI 1.19-1.51). The pooled female-to-male RR of hip fractures was 1.09 (95 % CI 0.93-1.28). CONCLUSIONS Individuals with diabetes mellitus have an excessive risk of hip fractures, and this relationship is more pronounced in type 1 diabetes. The association between diabetes and hip fracture risk is similar in men and women.
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Affiliation(s)
- Y Fan
- Institute of Molecular Biology and Translational Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, Jiangsu, People's Republic of China, 212002
| | - F Wei
- Institute of Molecular Biology and Translational Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, Jiangsu, People's Republic of China, 212002
| | - Y Lang
- Institute of Molecular Biology and Translational Medicine, The Affiliated People's Hospital, Jiangsu University, Zhenjiang, Jiangsu, People's Republic of China, 212002
| | - Y Liu
- Department of Endocrinology, The Affiliated People's Hospital, Jiangsu University, No. 8 Dianli Road, Zhenjiang, Jiangsu, People's Republic of China, 212002.
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Lang Y, del Monte F, Finn DP, Wang W, Pandit A. Synthesis of polymer-silica hybrid microparticles with defined geometry using surface initiated atom transfer radical polymerization. Polym Chem 2015. [DOI: 10.1039/c5py00228a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In vivo functionalization of the diatom with an initiator site allows grafting from the surface via SI-ATRP.
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Affiliation(s)
- Y. Lang
- Network of Excellence for Functional Biomaterials
- National University of Ireland
- Galway
- Ireland
- Pharmacology and Therapeutics
| | - F. del Monte
- Instituto de Ciencia de Materiales de Madrid
- Consejo Superior de Investigaciones Científicas
- Campus de Cantoblanco
- Madrid
- Spain
| | - D. P. Finn
- Pharmacology and Therapeutics
- School of Medicine
- and Centre for Pain Research
- National University of Ireland
- Galway
| | - W. Wang
- Network of Excellence for Functional Biomaterials
- National University of Ireland
- Galway
- Ireland
| | - A. Pandit
- Network of Excellence for Functional Biomaterials
- National University of Ireland
- Galway
- Ireland
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Ning J, Zhang J, Liu W, Lang Y, Xue Y, Xu S. Overexpression of ubiquitin-specific protease 22 predicts poor survival in patients with early-stage non-small cell lung cancer. Eur J Histochem 2012; 56:e46. [PMID: 23361242 PMCID: PMC3567765 DOI: 10.4081/ejh.2012.e46] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 10/11/2012] [Accepted: 07/26/2012] [Indexed: 01/16/2023] Open
Abstract
Ubiquitin-specific protease 22 (USP22), a novel ubiquitin hydrolase, has been implicated in oncogenesis and cancer progression in various types of human cancer. However, the clinical significance of USP22 expression in non-small cell lung cancer (NSCLC) has not been determined. In the present study, USP22 messenger RNA (mRNA) and protein levels were analyzed by quantitative real-time polymerase chain reaction (PCR) and western blot analysis in 30 cases of NSCLC and in corresponding non-tumor tissue samples. Furthermore, immunohistochemistry was performed to detect USP22 protein expression in 86 primary tumor tissues derived from clinically annotated NSCLC cases at stage I-II. In our analysis we found that both USP22 mRNA and protein levels in NSCLC tissues were significantly higher than those in corresponding non-tumor tissues and that there was a significant correlation between the expression of USP22 mRNA and protein (P=0.000, κ=0.732). In addition, a high-level of USP22 expression was observed in 53.3% (39 out of 86) cases and it was correlated with large tumor size (P=0.029) and lymph node metastasis (P=0.026). Patients with tumors displaying a high-level of USP22 expression showed significantly shorter survival (P=0.006, log-rank test). Importantly, multivariate analysis showed that high USP22 protein expression was an independent prognostic factor for NSCLC patients (P=0.003). In sum, our data suggest that USP22 plays an important role in NSCLC progression at the early stage, and that overexpression of USP22 in tumor tissues could be used as a potential prognostic marker for patients with early clinical stage of NSCLC.
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Affiliation(s)
- J Ning
- Department of Thoracic Surgery, The Third Affiliated Hospital of Harbin Medical University, Harbin, China
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Lang Y, Finn DP, Pandit A, Walsh PJ. Pharmacological activity of ibuprofen released from mesoporous silica. J Mater Sci Mater Med 2012; 23:73-80. [PMID: 22105222 DOI: 10.1007/s10856-011-4488-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Accepted: 11/05/2011] [Indexed: 05/31/2023]
Abstract
Novel drug delivery systems (DDS) to improve the pharmacokinetic profile of hydrophobic drugs following oral administration are an area of keen interest in drug research. An ideal DDS should not adversely affect drug activity, be capable of delivering a therapeutic dose of drug, and allow homogenous drug loading and drug release. Mesoporous silica has been proposed for this application, with ibuprofen employed as the model drug. It was hypothesised that mesoporous silica MCM-41 is capable of delivering a pharmacologically therapeutic dose of ibuprofen. Ibuprofen-loaded MCM-41 can be prepared reproducibly at a drug to carrier ratio of 30% (wt/wt). The release profile was seen to be 90% within 2 h. Initial assessment of COX-1 inhibitory activity suggests the absence of adverse effects attributable to drug-carrier interaction. The results of this study provide further evidence in support of the proposed use of mesoporous silica in drug delivery.
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Affiliation(s)
- Y Lang
- Network of Excellence for Functional Biomaterials, National University of Ireland, Galway, Ireland.
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Zhang JY, Lang Y, Chu ZQ, Liu X, Wu LL, Zhang XT. Synthesis and transport properties of Si-doped In2O3(ZnO)3 superlattice nanobelts. CrystEngComm 2011. [DOI: 10.1039/c1ce00004g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Lichtenstein GR, Diamond RH, Wagner CL, Fasanmade AA, Olson AD, Marano CW, Johanns J, Lang Y, Sandborn WJ. Clinical trial: benefits and risks of immunomodulators and maintenance infliximab for IBD-subgroup analyses across four randomized trials. Aliment Pharmacol Ther 2009. [PMID: 19392858 DOI: 10.1111/j.1365-2036.2009.04027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
BACKGROUND Benefits and risks of concomitant immunomodulators and maintenance infliximab in inflammatory bowel disease (IBD) patients have not been adequately evaluated. AIM To assess the effect of concomitant immunomodulator and infliximab maintenance therapy using data from four prospective, randomized Phase 3 trials in IBD patients. METHODS Overall, 1383 patients from ACCENT I and ACCENT II [luminal and fistulizing Crohn's disease trials] and ACT 1 and ACT 2 [ulcerative colitis trials] were analysed. Patients were treated with placebo or infliximab 5 or 10 mg/kg at weeks 0, 2 and 6 followed by every-8-week maintenance therapy. Clinical response, clinical remission, fistula response, complete fistula response, infection and infusion reaction rates; serum infliximab concentrations and immunogenicity were summarized by baseline concomitant immunomodulator subgroup (use or non-use). RESULTS Overall, almost 40% of evaluated IBD patients received concomitant immunomodulators. Efficacy, infection, and serious infection rates were generally similar in patients who received maintenance therapy with or without concomitant immunomodulators. There were no consistent differences in serum infliximab concentrations with or without immunomodulators in patients who received scheduled maintenance therapy. Concomitant immunomodulators reduced infusion reactions and immunogenicity. CONCLUSION Concomitant immunomodulators did not improve efficacy or pharmacokinetics in IBD patients who received maintenance infliximab.
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Affiliation(s)
- G R Lichtenstein
- Division of Gastroenterology, Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Lichtenstein GR, Diamond RH, Wagner CL, Fasanmade AA, Olson AD, Marano CW, Johanns J, Lang Y, Sandborn WJ. Clinical trial: benefits and risks of immunomodulators and maintenance infliximab for IBD-subgroup analyses across four randomized trials. Aliment Pharmacol Ther 2009; 30:210-26. [PMID: 19392858 DOI: 10.1111/j.1365-2036.2009.04027.x] [Citation(s) in RCA: 99] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Benefits and risks of concomitant immunomodulators and maintenance infliximab in inflammatory bowel disease (IBD) patients have not been adequately evaluated. AIM To assess the effect of concomitant immunomodulator and infliximab maintenance therapy using data from four prospective, randomized Phase 3 trials in IBD patients. METHODS Overall, 1383 patients from ACCENT I and ACCENT II [luminal and fistulizing Crohn's disease trials] and ACT 1 and ACT 2 [ulcerative colitis trials] were analysed. Patients were treated with placebo or infliximab 5 or 10 mg/kg at weeks 0, 2 and 6 followed by every-8-week maintenance therapy. Clinical response, clinical remission, fistula response, complete fistula response, infection and infusion reaction rates; serum infliximab concentrations and immunogenicity were summarized by baseline concomitant immunomodulator subgroup (use or non-use). RESULTS Overall, almost 40% of evaluated IBD patients received concomitant immunomodulators. Efficacy, infection, and serious infection rates were generally similar in patients who received maintenance therapy with or without concomitant immunomodulators. There were no consistent differences in serum infliximab concentrations with or without immunomodulators in patients who received scheduled maintenance therapy. Concomitant immunomodulators reduced infusion reactions and immunogenicity. CONCLUSION Concomitant immunomodulators did not improve efficacy or pharmacokinetics in IBD patients who received maintenance infliximab.
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Affiliation(s)
- G R Lichtenstein
- Division of Gastroenterology, Department of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Abstract
BACKGROUND The use of punctal plugs in the treatment of dry eyes is well established. Anophthalmic patients have less tears in the anophthalmic socket in comparison to their normal side, due to an absent corneal reflex (Lee & Elsie, 1981a,b). Many of those patients complain of dry eye symptoms, even when they are treated with tear replacement therapy. The authors wished to examine whether they could improve their dry socket complaints with punctal plugs. PURPOSE To evaluate the clinical efficacy and tolerability of punctal plug (Smart Plugs) insertion in anophthalmic patients with symptoms of dry eye. PATIENTS AND METHODS Interventional case series. Fifteen anophthalmic patients with dry eye symptoms, a Schirmer test of less than 3 mm and an open lacrimal passage were examined before and after insertion of punctal plugs. The patients were asked for their subjective evaluation of the treatment and were examined to evaluate the change. Schirmer tests were compared. Bacterial cultures were taken at both visits. RESULTS Schirmer results of less than 3 mm in the anophthalmic socket were obtained in 75% of patients with dry eyes symptoms; 87% of patients in whom punctal plugs were inserted reported an improvement in dry eye sensation. More than half of the patients demonstrated less discharge (p < or = 0.05). Schirmer tests improved from 1.4 mm to 1.9 mm (p < or = 0.05). Patients with a Schirmer outcome of 2 mm or more tended to have less pathogenic bacterial cultures (p = 0.11). CONCLUSION Punctal plugs improve the symptoms and signs of dry socket. Punctal plugs seem to reduce the pathogenic bacterial growth in the anophthalmic socket.
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Affiliation(s)
- Y Vardizer
- Department of Ophthalmology, Ha'emek Medical Center, Afula, Israel.
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Morris MWJ, Williams JL, Thake AJ, Lang Y, Brown JN. Optimal screw diameter for interference fixation in a bone tunnel: a porcine model. Knee Surg Sports Traumatol Arthrosc 2004; 12:486-9. [PMID: 14767640 DOI: 10.1007/s00167-003-0466-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2003] [Accepted: 10/14/2003] [Indexed: 10/26/2022]
Abstract
The study investigates the optimal interference screw dimensions required to secure a tendon graft in a bone tunnel. A standard 8 mm pig flexor-tendon graft was inserted into a standard open-ended 8 mm bone tunnel of a porcine distal femur and secured using either 7 mm, 8 mm or 9 mm diameter metal interference screws (Arthrex Inc, Naples, FL). The construct was tested to failure using a Shimadzu ASG 10KN Universal Material Testing Machine (Shimadzu, Tokyo, Japan). Load and mode of construct failure were recorded for 37 individual constructs. There was no significant difference in the load at failure between the 7 mm screw (192 N; range 151-232) and 8 mm screw (181 N; range 150-212) (p>0.05). There was a significant difference between the 7 mm screw and the 9 mm screw (109 N; range 67-151) (p=0.006) and between the 8 mm screw and the 9 mm screw (p=0.015). When using a 9 mm screw, 100% of the constructs failed by cut out of the graft at the tunnel opening. The 7 mm constructs failed by slippage of the tendon from the bone tunnel in 83% of cases, with only 17% failing by cut out at the tunnel opening. The 8 mm constructs demonstrated a mixture of failure modes, with slippage occurring in 58% of cases, cut out in 38% and failure of the graft substance in one case (4%). In this model, screw diameters equal to or 1 mm less than the tunnel/tendon diameter provides better fixation than using a screw 1 mm larger. The mode of failure differs for each of these screws.
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Affiliation(s)
- M W J Morris
- Department of Orthopaedic Surgery, Northern General Hospital, Sheffield, S5 7AU, UK.
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Abstract
We treated a patient who had a posteriorly dislocated endocapsular ring associated with decreased vision and intravitreal cortical remnants. The ring was removed by uneventful pars plana vitrectomy. By the last examination, best corrected visual acuity had improved to 6/12 and intraocular pressure had stabilized to within normal limits. A posteriorly dislocated endocapsular ring is a rare complication of cataract surgery. Its removal by pars plana vitrectomy under direct observation is effective and safe.
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Affiliation(s)
- Y Lang
- Department of Ophthalmology, Haemek Medical Center, Afula, Israel.
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Abstract
PURPOSE To evaluate the intraocular pressure (IOP) with three different instruments, Goldmann applanation tonometer (GAT), noncontact tonometer, and Tono-Pen after photorefractive keratectomy (PRK) for myopia. METHODS A prospective case series study to evaluate preoperative and postoperative IOP measurements of 149 eyes at 12 months. We performed GAT, noncontact tonometry, Tono-Pen central, and Tono-Pen temporal periphery measurements. We also performed measurements of the central corneal thickness (CCT) by ultrasonic pachymetry and keratometry. Pre-operative IOP reading served as control for all studies. RESULTS After PRK, IOP reading was significantly reduced in the treated eyes when compared with the control measurements (11.87+/-1.73 vs. 13.37+/-1.52 mm Hg, p<0.0001 with GAT; 12.07+/-1.6 vs. 13.51+/-1.59 mm Hg, p<0.0001 with noncontact tonometer; 12.18+/-1.6 vs. 13.48+/-1.55 mm Hg, p<0.0001 with Tono-Pen central; 13.48+/-1.65 vs. 13.71+/-1.56 Hg, p<0.0104 with Tono-Pen temporal periphery). There was also a significant correlation between IOP reading changes measured by GAT, noncontact tonometer, Tono-Pen central, and change of CCT and between reduction of IOP reading and keratometry (r2>0.39, p<0.0001 for each). The correlation between IOP reading change by Tono-Pen temporal periphery and CCT was also significant but r2 value was only 0.034. Tono-Pen temporal periphery postoperative IOP measurements had the best correlation with preoperative GAT IOP (r2 = 0.57, p<0.0001). CONCLUSIONS PRK reduced IOP reading as measured by GAT, noncontact tonometer, and Tono-Pen central; less so when measured by Tono-Pen temporal periphery. Early detection of glaucoma and IOP follow-up in glaucoma patients may be done best by peripheral Tono-Pen measurements over the nonablated cornea.
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Affiliation(s)
- H J Garzozi
- Department of Ophthalmology, Haemek Medical Center, Afula, Israel
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Garzozi HJ, Lang Y, Harris A. [Age-related macular degeneration: present situation and a glance toward the future]. Harefuah 2000; 138:567-72. [PMID: 10883187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
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Schweizer A, Valdenaire O, Köster A, Lang Y, Schmitt G, Lenz B, Bluethmann H, Rohrer J. Neonatal lethality in mice deficient in XCE, a novel member of the endothelin-converting enzyme and neutral endopeptidase family. J Biol Chem 1999; 274:20450-6. [PMID: 10400672 DOI: 10.1074/jbc.274.29.20450] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.9] [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: 11/06/2022] Open
Abstract
XCE, a new member of the endothelin-converting enzyme and neutral endopeptidase family, is preferentially expressed in specific areas of the central nervous system including spinal chord and medulla. To elucidate the importance and function of XCE, we disrupted its gene in mouse embryonic stem cells by homologous recombination and created mice deficient in XCE. The resulting phenotype is characterized by neonatal lethality. All XCE -/- homozygous mice died of respiratory failure shortly after birth, and in most cases their lungs were never ventilated. Apart from the atelectasis, anatomical and histological examinations of embryonic day 18.5 XCE -/- embryos and newborn homozygotes did not reveal any obvious abnormalities in organs and tissues. Malformations that are related to the knock-out were also not found in the skeletons of XCE -/- mice. In addition, XCE knock-out animals showed no deficiency of pulmonary surfactant proteins and had normal heart beat frequencies. Taken together, our results demonstrate that XCE is an essential gene. The phenotype of the XCE-deficient mice together with the central nervous system-specific expression further suggest that XCE may play a vital role in the control of respiration.
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Affiliation(s)
- A Schweizer
- Preclinical Cardiovascular Research, F. Hoffmann-La Roche Ltd., Pharma Division, Grenzacherstrasse 124, 4070 Basel, Switzerland
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Weber P, Bartsch U, Rasband MN, Czaniera R, Lang Y, Bluethmann H, Margolis RU, Levinson SR, Shrager P, Montag D, Schachner M. Mice deficient for tenascin-R display alterations of the extracellular matrix and decreased axonal conduction velocities in the CNS. J Neurosci 1999; 19:4245-62. [PMID: 10341229 PMCID: PMC6782606] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
Tenascin-R (TN-R), an extracellular matrix glycoprotein of the CNS, localizes to nodes of Ranvier and perineuronal nets and interacts in vitro with other extracellular matrix components and recognition molecules of the immunoglobulin superfamily. To characterize the functional roles of TN-R in vivo, we have generated mice deficient for TN-R by homologous recombination using embryonic stem cells. TN-R-deficient mice are viable and fertile. The anatomy of all major brain areas and the formation and structure of myelin appear normal. However, immunostaining for the chondroitin sulfate proteoglycan phosphacan, a high-affinity ligand for TN-R, is weak and diffuse in the mutant when compared with wild-type mice. Compound action potential recordings from optic nerves of mutant mice show a significant decrease in conduction velocity as compared with controls. However, at nodes of Ranvier there is no apparent change in expression and distribution of Na+ channels, which are thought to bind to TN-R via their beta2 subunit. The distribution of carbohydrate epitopes of perineuronal nets recognized by the lectin Wisteria floribunda or antibodies to the HNK-1 carbohydrate on somata and dendrites of cortical and hippocampal interneurons is abnormal. These observations indicate an essential role for TN-R in the formation of perineuronal nets and in normal conduction velocity of optic nerve.
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Affiliation(s)
- P Weber
- Department of Neurobiology, Swiss Federal Institute of Technology, Hönggerberg, CH 8093 Zürich, Switzerland
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Lang Y, Forquet F, Speck E, Blum J, Delovitch TL. Major histocompatibility complex class II molecules function as a template for the processing of a partially processed insulin peptide into a T-cell epitope. Diabetes 1996; 45:1711-9. [PMID: 8922356 DOI: 10.2337/diab.45.12.1711] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Our understanding of how an autoantigen is processed and presented during the development of a major histocompatibility complex (MHC) class II-dependent and T-cell-mediated autoimmune disease, such as IDDM, is incompletely understood. We have used insulin as a model autoantigen in IDDM to address the question of whether MHC class II molecules play a role in the generation and/or preservation of an autoantigen peptide that stimulates T-cell activation. Analyses of the requirement of I-Ad class II molecules in the processing of the partially processed porcine insulin peptide A1-A14/B1-B16 demonstrate that the binding of this peptide to I-Ad is essential for it to be further processed and tailored into a T-cell epitope. Based on our observations, we propose a two-step model for insulin processing in which insulin is first processed by an enzyme(s) into an intermediate peptide that binds to class II and then class II functions as a template to guide the processing of this partially processed peptide by cathepsin D into a T-cell epitope. Our data further underscore the important realization that MHC class II-directed processing of an autoantigen (e.g., insulin) may regulate 1) the relative immunodominance of T-cell determinants in an autoantigen, 2) the self-reactivity to cryptic T-cell epitopes in autoantigens, and 3) the susceptibility to autoimmune disease.
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Affiliation(s)
- Y Lang
- The John P. Robarts Research Institute, Department of Microbiology and Immunology, University of Western Ontario, London, Canada
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45
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Madsen U, Bang-Andersen B, Brehm L, Christensen IT, Ebert B, Kristoffersen IT, Lang Y, Krogsgaard-Larsen P. Synthesis and pharmacology of highly selective carboxy and phosphono isoxazole amino acid AMPA receptor antagonists. J Med Chem 1996; 39:1682-91. [PMID: 8648608 DOI: 10.1021/jm950826p] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
(RS)-2-Amino-3-(3-hydroxy-5-methyl-4-isoxazolyl)propionic acid (AMPA, 5) and the selective AMPA receptor antagonist (RS)-2-amino-3-[3-(carboxymethoxy)-5-methyl-4-isoxazolyl]propionic acid (AMOA, 7) have been used as leads for the design and synthesis of a number of potential AMPA receptor antagonists. Two parallel series of AMOA analogs were synthesized, containing either a distal carboxylic acid (compounds 8b-g and 11b) or a phosphonic acid (compounds 9a-g, 10c, and 11c). Pharmacological characterization of the synthesized compounds was carried out using a series of receptor binding assays and by in vitro electrophysiological experiments using the rat cortical slice model. The two analogs with a tert-butyl substituent, (RS)-2-amino-3-[5-tert-butyl-3-(carboxymethoxy)-4-isoxazolyl]pr opi onic acid (ATOA, 8b) and the corresponding phosphonic acid analog ATPO (9b), were the most potent and selective AMPA antagonists within each series. ATOA and ATPO showed IC50 values of 150 and 28 microM, respectively, toward AMPA-induced depolarizations in the cortical slice model compared to IC50 = 320 microM for the parent compound, AMOA. These two new competitive AMPA antagonists were significantly more selective than AMOA, showing no antagonism (up to 1 mM) toward NMDA-induced responses, whereas AMOA (at 1mM) showed weak (19%) inhibition toward NMDA-induced responses. The structure-activity relationships for the two series of compounds revealed considerable differences with respect to the substituents effects, and the phosphonic acid analogs generally exhibited significantly higher potencies compared to the carboxylic acid analogs.
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Affiliation(s)
- U Madsen
- Department of Medicinal Chemistry, The Royal Danish School of Pharmacy, Copenhagen, Denmark.
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Schultze N, Burki Y, Lang Y, Certa U, Bluethmann H. Efficient control of gene expression by single step integration of the tetracycline system in transgenic mice. Nat Biotechnol 1996; 14:499-503. [PMID: 9630928 DOI: 10.1038/nbt0496-499] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.9] [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: 02/07/2023]
Abstract
Tetracycline-regulated gene expression in eukaryotic cell lines, plants, and transgenic mice has become a powerful tool for the analysis of eukaryotic gene expression and function. The system consists of two plasmids, one encoding the transactivator protein under control of a viral cytomegalovirus promoter, and the second being the tet-operator minimal promoter driving the gene of interest. Here we show that these control elements, when integrated in cis on a single plasmid, allow efficient and tight control of reporter gene expression in vitro and in vivo. Dependent on the route of administration of tetracycline, gene expression can be partially or fully repressed in transgenic mice, whereas removal of the antibiotic induces the reporter gene in various tissues to levels up to 800-fold more than the two-plasmid system. In addition, crossing and analysis of animals transgenic for the individual components of the system are unnecessary, and genetic segregation of the control elements during breeding is prevented.
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Affiliation(s)
- N Schultze
- F. Hoffmann-La Roche Ltd., Basel, Switzerland
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47
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Abstract
Electrophysiologic tests were performed in 233 patients who complained of reduced visual acuity with no satisfactory clinical explanation. The functional integrity of the retina was assessed from the light- and dark-adapted electroretinogram. Macular function and conduction in the optic nerves were estimated from the flash visual evoked potentials. Of the 233 patients 78 were grouped together on the basis of the electrophysiologic and clinical findings. They were characterized by subnormal electroretinogram responses with the cone system more affected than the rod system. The flash visual evoked potential responses were of abnormal waveform and prolonged implicit times. Most of these patients exhibited normal fundi. The reduction in visual acuity, the degree of electroretinogram deficits and the pattern of the visual evoked potential responses were similar in both eyes of each patient, indicating a symmetric disorder. Slight deterioration of visual acuity and electrophysiologic variables were observed in 37 of the patients who were followed up over a period of up to 8 years. The electrophysiologic findings indicate that about 20% of patients complaining of unexplained reduction in visual acuity were suffering from a diffuse retinal disorder affecting the peripheral retina as well as the macular region. On the basis of electrophysiologic findings and clinical symptoms, we suggest grouping these patients under a new entity: cone-rod dysfunction.
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Affiliation(s)
- Y Lang
- Department of Ophthalmology, Haemek Medical Center, Afula, Israel
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48
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Günther U, Benson J, Benke D, Fritschy JM, Reyes G, Knoflach F, Crestani F, Aguzzi A, Arigoni M, Lang Y, Bluethmann H, Mohler H, Lüscher B. Benzodiazepine-insensitive mice generated by targeted disruption of the gamma 2 subunit gene of gamma-aminobutyric acid type A receptors. Proc Natl Acad Sci U S A 1995; 92:7749-53. [PMID: 7644489 PMCID: PMC41223 DOI: 10.1073/pnas.92.17.7749] [Citation(s) in RCA: 365] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Vigilance, anxiety, epileptic activity, and muscle tone can be modulated by drugs acting at the benzodiazepine (BZ) site of gamma-aminobutyric acid type A (GABAA) receptors. In vivo, BZ sites are potential targets for endogenous ligands regulating the corresponding central nervous system states. To assess the physiological relevance of BZ sites, mice were generated containing GABAA receptors devoid of BZ sites. Following targeted disruption of the gamma 2 subunit gene, 94% of the BZ sites were absent in brain of neonatal mice, while the number of GABA sites was only slightly reduced. Except for the gamma 2 subunit, the level of expression and the regional and cellular distribution of the major GABAA receptor subunits were unaltered. The single channel main conductance level and the Hill coefficient were reduced to values consistent with recombinant GABAA receptors composed of alpha and beta subunits. The GABA response was potentiated by pentobarbital but not by flunitrazepam. Diazepam was inactive behaviorally. Thus, the gamma 2 subunit is dispensable for the assembly of functional GABAA receptors but is required for normal channel conductance and the formation of BZ sites in vivo. BZ sites are not essential for embryonic development, as suggested by the normal body weight and histology of newborn mice. Postnatally, however, the reduced GABAA receptor function is associated with retarded growth, sensorimotor dysfunction, and drastically reduced life-span. The lack of postnatal GABAA receptor regulation by endogenous ligands of BZ sites might contribute to this phenotype.
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Affiliation(s)
- U Günther
- Institute of Pharmacology, University of Zurich, Switzerland
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49
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Shi S, Lang Y. [Mammaplasty immediately after mastectomy for breast cancer]. Zhonghua Zheng Xing Shao Shang Wai Ke Za Zhi 1995; 11:253-4. [PMID: 8732000] [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: 02/01/2023]
Abstract
From March 1990 to March 1994, 7 cases of one stage breast reconstruction with silicone prosthesis after mastectomy for breast cancer were performed in our hospital. All the operations were successful and no operative complication observed. They were followed up for three months to four years. The contour was good, symmetrical, soft to touch and the patients did not complain uncomfortable sensation. The authors propose that immediate reconstruction of the breast be recommended. In this paper, the indications, methods, selection of opportune time for operation and precautions are discussed.
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Affiliation(s)
- S Shi
- Department of Breast, Tianjing Cancer Hospital
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50
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Abstract
The results of our experiments showed that the 5'-terminal sequences of 23S rRNAs can be used to distinguish different genera of actinomycetes, including the genera Streptomyces, Micromonospora, Amycolatopsis, and Saccharomonospora. There are small differences (< 1%) among the sequences of some strains belonging to the genera Streptomyces (two strains) and Saccharomonospora (seven strains). On the basis of the results of morphological and biochemical analyses, strain 9022 belongs in the genus Saccharomonospora; however, there are distinct differences in the cell wall compositions and the 5' termini of the 23S rRNA sequences of this strain and members of the genus Saccharomonospora. Hence, strain 9022 cannot be classified in the genus Saccharomonospora.
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Affiliation(s)
- J S Ruan
- Institute of Microbiology, Academia Sinica, Beijing, People's Republic of China
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