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Xie J, Zhang Y, Li B, Xi W, Wang Y, Li L, Liu C, Shen L, Han B, Kong Y, Yao H, Zhang Z. Inhibition of OGFOD1 by FG4592 confers neuroprotection by activating unfolded protein response and autophagy after ischemic stroke. J Transl Med 2024; 22:248. [PMID: 38454480 PMCID: PMC10921652 DOI: 10.1186/s12967-024-04993-3] [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] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Accepted: 02/12/2024] [Indexed: 03/09/2024] Open
Abstract
BACKGROUND Acute ischemic stroke is a common neurological disease with a significant financial burden but lacks effective drugs. Hypoxia-inducible factor (HIF) and prolyl hydroxylases (PHDs) participate in the pathophysiological process of ischemia. However, whether FG4592, the first clinically approved PHDs inhibitor, can alleviate ischemic brain injury remains unclear. METHODS The infarct volumes and behaviour tests were first analyzed in mice after ischemic stroke with systemic administration of FG4592. The knockdown of HIF-1α and pretreatments of HIF-1/2α inhibitors were then used to verify whether the neuroprotection of FG4592 is HIF-dependent. The targets predicting and molecular docking methods were applied to find other targets of FG4592. Molecular, cell biological and gene knockdown methods were finally conducted to explore the potential neuroprotective mechanisms of FG4592. RESULTS We found that the systemic administration of FG4592 decreased infarct volume and improved neurological defects of mice after transient or permanent ischemia. Meanwhile, FG4592 also activated autophagy and inhibited apoptosis in peri-infarct tissue of mice brains. However, in vitro and in vivo results suggested that the neuroprotection of FG4592 was not classical HIF-dependent. 2-oxoglutarate and iron-dependent oxygenase domain-containing protein 1 (OGFOD1) was found to be a novel target of FG4592 and regulated the Pro-62 hydroxylation in the small ribosomal protein s23 (Rps23) with the help of target predicting and molecular docking methods. Subsequently, the knockdown of OGFOD1 protected the cell against ischemia/reperfusion injury and activated unfolded protein response (UPR) and autophagy. Moreover, FG4592 was also found to activate UPR and autophagic flux in HIF-1α independent manner. Blocking UPR attenuated the neuroprotection, pro-autophagy effect and anti-apoptosis ability of FG4592. CONCLUSION This study demonstrated that FG4592 could be a candidate drug for treating ischemic stroke. The neuroprotection of FG4592 might be mediated by inhibiting alternative target OGFOD1, which activated the UPR and autophagy and inhibited apoptosis after ischemic injury. The inhibition of OGFOD1 is a novel therapy for ischemic stroke.
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Affiliation(s)
- Jian Xie
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Institution of Neuropsychiatry, Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Yuan Zhang
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Bin Li
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Wen Xi
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Yu Wang
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Lu Li
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Chenchen Liu
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Ling Shen
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Bing Han
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China
| | - Yan Kong
- Department of Biochemistry and Molecular Biology, School of Medicine, Southeast University, No. 87 Dingjiaqiao Road, Nanjing, 210009, Jiangsu, China
| | - HongHong Yao
- Department of Pharmacology, School of Medicine, Southeast University, Nanjing, 210009, Jiangsu, China.
| | - Zhijun Zhang
- Department of Neurology, Affiliated ZhongDa Hospital, School of Medicine, Institution of Neuropsychiatry, Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, 210009, Jiangsu, China.
- The Brain Cognition and Brain Disease Institute of Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, 518055, Guangdong, China.
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Han B, Zhou S, Zhang Y, Chen S, Xi W, Liu C, Zhou X, Yuan M, Yu X, Li L, Wang Y, Ren H, Xie J, Li B, Ju M, Zhou Y, Liu Z, Xiong Z, Shen L, Zhang Y, Bai Y, Chen J, Jiang W, Yao H. Integrating spatial and single-cell transcriptomics to characterize the molecular and cellular architecture of the ischemic mouse brain. Sci Transl Med 2024; 16:eadg1323. [PMID: 38324639 DOI: 10.1126/scitranslmed.adg1323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 01/12/2024] [Indexed: 02/09/2024]
Abstract
Neuroinflammation is acknowledged as a pivotal pathological event after cerebral ischemia. However, there is limited knowledge of the molecular and spatial characteristics of nonneuronal cells, as well as of the interactions between cell types in the ischemic brain. Here, we used spatial transcriptomics to study the ischemic hemisphere in mice after stroke and sequenced the transcriptomes of 19,777 spots, allowing us to both visualize the transcriptional landscape within the tissue and identify gene expression profiles linked to specific histologic entities. Cell types identified by single-cell RNA sequencing confirmed and enriched the spatial annotation of ischemia-associated gene expression in the peri-infarct area of the ischemic hemisphere. Analysis of ligand-receptor interactions in cell communication revealed galectin-9 to cell-surface glycoprotein CD44 (LGALS9-CD44) as a critical signaling pathway after ischemic injury and identified microglia and macrophages as the main source of galectins after stroke. Extracellular vesicle-mediated Lgals9 delivery improved the long-term functional recovery in photothrombotic stroke mice. Knockdown of Cd44 partially reversed these therapeutic effects, inhibiting oligodendrocyte differentiation and remyelination. In summary, our study provides a detailed molecular and cellular characterization of the peri-infact area in a murine stroke model and revealed Lgals9 as potential treatment target that warrants further investigation.
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Affiliation(s)
- Bing Han
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Shunheng Zhou
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Yuan Zhang
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Sina Chen
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Wen Xi
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Chenchen Liu
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Xu Zhou
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Mengqin Yuan
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Xiaoyu Yu
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Lu Li
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Yu Wang
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Hui Ren
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Jian Xie
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Bin Li
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Minzi Ju
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - You Zhou
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Ziqi Liu
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Zhongli Xiong
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Ling Shen
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Yuan Zhang
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Ying Bai
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
| | - Jun Chen
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15261, USA
| | - Wei Jiang
- Department of Biomedical Engineering, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Honghong Yao
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing 210009, China
- Co-innovation Center of Neuroregeneration, Nantong University, Nantong 226019, China
- Institute of Life Sciences, Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing 210009, China
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She J, Tuerhongjiang G, Guo M, Liu J, Hao X, Guo L, Liu N, Xi W, Zheng T, Du B, Lou B, Gao X, Yuan X, Yu Y, Zhang Y, Gao F, Zhuo X, Xiong Y, Zhang X, Yu J, Yuan Z, Wu Y. Statins aggravate insulin resistance through reduced blood glucagon-like peptide-1 levels in a microbiota-dependent manner. Cell Metab 2024; 36:408-421.e5. [PMID: 38325336 DOI: 10.1016/j.cmet.2023.12.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 10/23/2023] [Accepted: 12/28/2023] [Indexed: 02/09/2024]
Abstract
Statins are currently the most common cholesterol-lowering drug, but the underlying mechanism of statin-induced hyperglycemia is unclear. To investigate whether the gut microbiome and its metabolites contribute to statin-associated glucose intolerance, we recruited 30 patients with atorvastatin and 10 controls, followed up for 16 weeks, and found a decreased abundance of the genus Clostridium in feces and altered serum and fecal bile acid profiles among patients with atorvastatin therapy. Animal experiments validated that statin could induce glucose intolerance, and transplantation of Clostridium sp. and supplementation of ursodeoxycholic acid (UDCA) could ameliorate statin-induced glucose intolerance. Furthermore, oral UDCA administration in humans alleviated the glucose intolerance without impairing the lipid-lowering effect. Our study demonstrated that the statin-induced hyperglycemic effect was attributed to the Clostridium sp.-bile acids axis and provided important insights into adjuvant therapy of UDCA to lower the adverse risk of statin therapy.
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Affiliation(s)
- Jianqing She
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China; Cardiometabolic Innovation Center, Ministry of Education, Xi'an, Shaanxi, China; MED-X Institute, Center for Immunological and Metabolic Diseases (CIMD), First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Gulinigaer Tuerhongjiang
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Manyun Guo
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Junhui Liu
- Clinical Laboratory, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xiang Hao
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Liangan Guo
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Nairong Liu
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Wen Xi
- Clinical Laboratory, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Tao Zheng
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Bin Du
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Bowen Lou
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Xiyu Gao
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Xiao Yuan
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Yue Yu
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Yi Zhang
- MED-X Institute, Center for Immunological and Metabolic Diseases (CIMD), First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Fan Gao
- Clinical Research Center, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Xiaozhen Zhuo
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China; Cardiometabolic Innovation Center, Ministry of Education, Xi'an, Shaanxi, China
| | - Ying Xiong
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China; Cardiometabolic Innovation Center, Ministry of Education, Xi'an, Shaanxi, China
| | - Xiang Zhang
- Department of Medicine and Therapeutics and Institute of Digestive Disease, The State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Jun Yu
- Department of Medicine and Therapeutics and Institute of Digestive Disease, The State Key Laboratory of Digestive Disease, The Chinese University of Hong Kong, Hong Kong SAR, China.
| | - Zuyi Yuan
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China; Cardiometabolic Innovation Center, Ministry of Education, Xi'an, Shaanxi, China.
| | - Yue Wu
- Cardiovascular Department, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China; Cardiometabolic Innovation Center, Ministry of Education, Xi'an, Shaanxi, China.
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Li R, Liang H, Li J, Shao Z, Yang D, Bao J, Wang K, Xi W, Gao Z, Guo R, Mu X. Paclitaxel liposome (Lipusu) based chemotherapy combined with immunotherapy for advanced non-small cell lung cancer: a multicenter, retrospective real-world study. BMC Cancer 2024; 24:107. [PMID: 38238648 PMCID: PMC10797919 DOI: 10.1186/s12885-024-11860-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 12/20/2023] [Indexed: 01/22/2024] Open
Abstract
BACKGROUND Paclitaxel liposome (Lipusu) is known to be effective in non-small cell lung cancer (NSCLC) as first-line treatment. This study aimed to evaluate the effectiveness and safety of paclitaxel liposome based chemotherapy plus PD-1/PD-L1 inhibitor in patients with advanced NSCLC. METHODS In this multicenter, retrospective, real-world study, patients with advanced NSCLC who were administered paclitaxel liposome based chemotherapy plus PD-1/PD-L1 inhibitor in three centers (Peking University People's Hospital as the lead center) in China between 2016 and 2022 were included. Progression-free survival (PFS), overall survival (OS), objective response rate, disease control rate, and adverse events (AEs) were evaluated. RESULTS A total of 49 patients were included, with 33 (67.3%) receiving paclitaxel liposome based chemotherapy plus PD-1/PD-L1 inhibitor as first-line treatment. There were 34 patients (69.4%) diagnosed with squamous cell carcinoma and 15 (30.6%) with adenocarcinoma. The median follow-up was 20.5 (range: 3.1-41.1) months. The median PFS and OS of all patients were 9.7 months (95% confidence interval [CI], 7.0-12.4) and 30.5 months (95% CI, not evaluable-not evaluable), respectively. Patients with squamous cell carcinoma and adenocarcinoma had median PFS of 11 months (95%CI, 6.5-15.5) and 9.3 months (95%CI, 7.0-12.4), respectively. The median PFS was 9.9 months (95%CI, 7.1-12.7) in patients who received the combined regimen as first-line treatment. Treatment-related AEs of any grade were observed in 25 (51.0%) patients, and AEs of grade 3 or worse were observed in nine patients (18.4%). The most common treatment-related AEs were myelosuppression (14.3%) and fever (10.2%). CONCLUSIONS Paclitaxel liposome based chemotherapy plus PD-1/PD-L1 inhibitor prolonged the PFS in advanced NSCLC with acceptable safety, which was worthy of clinical application.
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Affiliation(s)
- Ran Li
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China
| | - Hongge Liang
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China
| | - Jun Li
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, 210029, Nanjing, China
| | - Zhenyu Shao
- Department of Radiation Oncology, Qilu Hospital of Shandong University, 250012, Jinan, China
| | - Donghong Yang
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China
| | - Jing Bao
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China
| | - Keqiang Wang
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China
| | - Renhua Guo
- Department of Oncology, The First Affiliated Hospital of Nanjing Medical University, 210029, Nanjing, China
| | - Xinlin Mu
- Department of Respiratory and Critical Care Medicine, Lung Cancer Center, Peking University People's Hospital, No.11 Xizhimen South Street, Xicheng District, 100044, Beijing, China.
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Bian W, Xie Y, Shang Y, Zhao L, Yang Z, Ma X, He Y, Yu W, Xi W, Yang D, Wang F, Chen Y, Gong P, Gao Z. Relationship between clinical features and droplet digital PCR copy number in non-HIV patients with pneumocystis pneumonia. BMC Infect Dis 2023; 23:833. [PMID: 38012564 PMCID: PMC10683233 DOI: 10.1186/s12879-023-08580-7] [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] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 09/04/2023] [Indexed: 11/29/2023] Open
Abstract
OBJECTIVE Droplet digital PCR (ddPCR) is a novel assay to detect pneumocystis jjrovecii (Pj) which has been defined to be more sensitive than qPCR in recent studies. We aimed to explore whether clinical features of pneumocystis pneumonia (PCP) were associated with ddPCR copy numbers of Pj. METHODS A total of 48 PCP patients were retrospectively included. Pj detection was implemented by ddPCR assay within 4 h. Bronchoalveolar fluid (BALF) samples were collected from 48 patients with molecular diagnosis as PCP via metagenomic next generation sequencing (mNGS) or quantitative PCR detection. Univariate and multivariate logistic regression were performed to screen out possible indicators for the severity of PCP. The patients were divided into two groups according to ddPCR copy numbers, and their clinical features were further analyzed. RESULTS Pj loading was a pro rata increase with serum (1,3)-beta-D glucan, D-dimmer, neutrophil percentage, procalcitonin and BALF polymorphonuclear leucocyte percentage, while negative correlation with albumin, PaO2/FiO2, BALF cell count, and BALF lymphocyte percentage. D-dimmer and ddPCR copy number of Pj were independent indicators for moderate/severe PCP patients with PaO2/FiO2 lower than 300. We made a ROC analysis of ddPCR copy number of Pj for PaO2/FiO2 index and grouped the patients according to the cut-off value (2.75). The high copy numbers group was characterized by higher level of inflammatory markers. Compared to low copy number group, there was lower level of the total cell count while higher level of polymorphonuclear leucocyte percentage in BALF in the high copy numbers group. Different from patients with high copy numbers, those with high copy numbers had a tendency to develop more severe complications and required advanced respiratory support. CONCLUSION The scenarios of patients infected with high ddPCR copy numbers of Pj showed more adverse clinical conditions. Pj loading could reflect the severity of PCP to some extent.
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Affiliation(s)
- Wenjie Bian
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Yu Xie
- Department of Respiratory Medicine, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ying Shang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Lili Zhao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Zhengwu Yang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Xinqian Ma
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Yukun He
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Wenyi Yu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Donghong Yang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Fang Wang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Yanwen Chen
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China
| | - Pihua Gong
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China.
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, No.11, Xizhimen South Street, Beijing, China.
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Miao X, Xi W, Bao Y. LncRNA RP11-58O9.2 predicts poor prognosis and promotes progression of non-small cell lung cancer. J Int Med Res 2023; 51:3000605231206295. [PMID: 37871619 PMCID: PMC10594974 DOI: 10.1177/03000605231206295] [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] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 09/21/2023] [Indexed: 10/25/2023] Open
Abstract
OBJECTIVE Long non-coding RNAs (lncRNAs) play a crucial role in non-small cell lung cancer (NSCLC). This study aimed to investigate the novel biomarker, lncRNA RP11-58O9.2, in patients with NSCLC. METHODS RP11-58O9.2 expression in NSCLC cells and tissues was detected by reverse transcription-quantitative polymerase chain reaction. Patient survival was analyzed in relation to RP11-58O9.2 expression levels. RP11-58O9.2 expression was knocked down and endogenous expression was verified in two NSCLC cell lines. Cell proliferation was then assessed by Cell Counting Kit-8 and colony-formation assays, and cell invasion and migration were assessed by Transwell and wound-healing assays, respectively. In vivo experiments were performed in mice, and the combination of RP11-58O9.2 and miR-6749-3p was predicted by miRanda. RESULTS RP11-58O9.2 was highly expressed in NSCLC cell lines and tissues, and was associated with advanced stage, lymphatic metastasis, and differentiation group. High RP11-58O9.2 levels were also associated with shorter survival. RP11-58O9.2 knockdown inhibited the proliferation, invasion, and migration of lung cancer cells, and tumor growth in mouse xenografts in vivo. RP11-58O9.2 may target and regulate miR-6749-3p. CONCLUSIONS LncRNA RP11-58O9.2 is associated with NSCLC prognosis and promotes lung cancer progression. Further studies are needed to investigate the mechanisms and the regulatory association between RP11-58O9.2 and miR-6749-3p.
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Affiliation(s)
- Xuan Miao
- Department of Respiratory Medicine, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Wen Xi
- Department of Respiratory Medicine, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Yongxia Bao
- Department of Respiratory Medicine, The Second Affiliated Hospital of Harbin Medical University, Harbin, China
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Wang R, Zhang Y, Xi W, Zhang J, Gong Y, He B, Wang H, Jin J. 3D printing of hierarchically micro/nanostructured electrodes for high-performance rechargeable batteries. Nanoscale 2023; 15:13932-13951. [PMID: 37581599 DOI: 10.1039/d3nr03098a] [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] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
3D printing, also known as additive manufacturing, is capable of fabricating 3D hierarchical micro/nanostructures by depositing a layer-upon-layer of precursor materials and solvent-based inks under the assistance of computer-aided design (CAD) files. 3D printing has been employed to construct 3D hierarchically micro/nanostructured electrodes for rechargeable batteries, endowing them with high specific surface areas, short ion transport lengths, and high mass loading. This review summarizes the advantages and limitations of various 3D printing methods and presents the recent developments of 3D-printed electrodes in rechargeable batteries, such as lithium-ion batteries, sodium-ion batteries, and lithium-sulfur batteries. Furthermore, the challenges and perspectives of the 3D printing technique for electrodes and rechargeable batteries are put forward. This review will provide new insight into the 3D printing of hierarchically micro/nanostructured electrodes in rechargeable batteries and promote the development of 3D printed electrodes and batteries in the future.
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Affiliation(s)
- Rui Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Youfang Zhang
- Hubei Key Laboratory of Polymer Materials, Ministry of Education Key Laboratory for Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, China.
| | - Wen Xi
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Junpu Zhang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Yansheng Gong
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Beibei He
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Huanwen Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Jun Jin
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
- Shenzhen Research Institute, China University of Geosciences, Shenzhen 518000, China
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8
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He Y, Chu Y, Guo S, Hu J, Li R, Zheng Y, Ma X, Du Z, Zhao L, Yu W, Xue J, Bian W, Yang F, Chen X, Zhang P, Wu R, Ma Y, Shao C, Chen J, Wang J, Li J, Wu J, Hu X, Long Q, Jiang M, Ye H, Song S, Li G, Wei Y, Xu Y, Ma Y, Chen Y, Wang K, Bao J, Xi W, Wang F, Ni W, Zhang M, Yu Y, Li S, Kang Y, Gao Z. T2T-YAO: A Telomere-to-telomere Assembled Diploid Reference Genome for Han Chinese. Genomics Proteomics Bioinformatics 2023:S1672-0229(23)00100-6. [PMID: 37595788 DOI: 10.1016/j.gpb.2023.08.001] [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] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/01/2023] [Accepted: 08/08/2023] [Indexed: 08/20/2023]
Abstract
Since its initial release in 2001, the human reference genome has undergone continuous improvement in quality, and the recently released telomere-to-telomere (T2T) version - T2T-CHM13 - reaches its highest level of continuity and accuracy after 20 years of effort by working on a simplified, nearly homozygous genome of a hydatidiform mole cell line. Here, to provide an authentic complete diploid human genome reference for the Han Chinese, the largest population in the world, we assembled the genome of a male Han Chinese individual, T2T-YAO, which includes T2T assemblies of all the 22 + X + M and 22 + Y chromosomes in both haploid. The quality of T2T-YAO is much better than all currently available diploid assemblies, and its haploid version, T2T-YAO-hp, generated by selecting the better assembly for each autosome, reaches the top quality of fewer than one error per 29.5 Mb, even higher than that of T2T-CHM13. Derived from an individual living in the aboriginal region of the Han population, T2T-YAO shows clear ancestry and potential genetic continuity from the ancient ancestors. Each haplotype of T2T-YAO possesses ∼ 330-Mb exclusive sequences, ∼ 3100 unique genes, and tens of thousands of nucleotide and structural variations as compared with CHM13, highlighting the necessity of a population-stratified reference genome. The construction of T2T-YAO, a truly accurate and authentic representative of the Chinese population, would enable precise delineation of genomic variations and advance our understandings in the hereditability of diseases and phenotypes, especially within the context of the unique variations of the Chinese population.
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Affiliation(s)
- Yukun He
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Yanan Chu
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Shuming Guo
- Linfen Clinical Medicine Research Center, Linfen 041000, China; Institute of Chest and Lung Diseases, Shanxi Medical University, Taiyuan 030001, China
| | - Jiang Hu
- GrandOmics Biosciences Co., Ltd, Wuhan 430076, China
| | - Ran Li
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Yali Zheng
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Xinqian Ma
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Zhenglin Du
- Institute of PSI Genomics, Wenzhou 325024, China
| | - Lili Zhao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Wenyi Yu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Jianbo Xue
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Wenjie Bian
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Feifei Yang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Xi Chen
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Pingan Zhang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Rihan Wu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Yifan Ma
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Changjun Shao
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Jing Chen
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Jian Wang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China
| | - Jiwei Li
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Jing Wu
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Xiaoyi Hu
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Qiuyue Long
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Mingzheng Jiang
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Hongli Ye
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Shixu Song
- Department of Respiratory, Critical Care and Sleep Medicine, Xiang'an Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen 361101, China
| | - Guangyao Li
- Linfen Clinical Medicine Research Center, Linfen 041000, China
| | - Yue Wei
- Linfen Clinical Medicine Research Center, Linfen 041000, China
| | - Yu Xu
- Beijing Jishuitan Hospital, Capital Medical University, Beijing 100035, China
| | - Yanliang Ma
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Yanwen Chen
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Keqiang Wang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Jing Bao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Fang Wang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Wentao Ni
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Moqin Zhang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Yan Yu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Shengnan Li
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China
| | - Yu Kang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences and China National Center for Bioinformation, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100190, China.
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China; Institute of Chest and Lung Diseases, Shanxi Medical University, Taiyuan 030001, China; Beijing Key Laboratory of Genome and Precision Medicine Technologies, Beijing 100101, China.
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9
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Lin EYH, Xi W, Aggarwal N, Shinohara ML. Osteopontin (OPN)/SPP1: from its biochemistry to biological functions in the innate immune system and the central nervous system (CNS). Int Immunol 2023; 35:171-180. [PMID: 36525591 PMCID: PMC10071791 DOI: 10.1093/intimm/dxac060] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 12/14/2022] [Indexed: 12/23/2022] Open
Abstract
Osteopontin (OPN) is a multifunctional protein, initially identified in osteosarcoma cells with its role of mediating osteoblast adhesion. Later studies revealed that OPN is associated with many inflammatory conditions caused by infections, allergic responses, autoimmunity and tissue damage. Many cell types in the peripheral immune system express OPN with various functions, which could be beneficial or detrimental. Also, more recent studies demonstrated that OPN is highly expressed in the central nervous system (CNS), particularly in microglia during CNS diseases and development. However, understanding of mechanisms underlying OPN's functions in the CNS is still limited. In this review, we focus on peripheral myeloid cells and CNS-resident cells to discuss the expression and functions of OPN.
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Affiliation(s)
- Elliot Yi-Hsin Lin
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Wen Xi
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Nupur Aggarwal
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
| | - Mari L Shinohara
- Department of Immunology, Duke University School of Medicine, Durham, NC 27710, USA
- Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA
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10
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Zhang Y, Shen L, Xie J, Li L, Xi W, Li B, Bai Y, Yao H, Zhang S, Han B. Pushen capsule treatment promotes functional recovery after ischemic stroke. Phytomedicine 2023; 111:154664. [PMID: 36682301 DOI: 10.1016/j.phymed.2023.154664] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 12/26/2022] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
BACKGROUND As a leading cause of long-term disability, ischemic stroke urgently needs further research and drug development. Pushen capsule (Pushen) has been commonly applied in clinical treatment for relieving headaches, dizziness, and numbness. However, the effects of Pushen on ischemic stroke have not been revealed yet. PURPOSE To assess the efficiency of Pushen in ischemic stroke and identify its potential therapeutic targets and active ingredients for treating ischemic stroke. STUDY DESIGN AND METHODS Behavioural experiments, Triphenyltetrazolium chloride (TTC) staining, Magnetic resonance imaging (MRI), and immunofluorescence staining were performed to examine the efficiency of Pushen in stroke model mice. The potential mechanism and active ingredients of Pushen were assessed by transcriptome, 16S rDNA sequencing, metabonomics, and network pharmacology. Finally, the targets were validated by RT-PCR, chromatin immunoprecipitation (ChIP), ELISA, and molecular docking methods. RESULTS Pushen had several effects on stroke model mice, including reducing the infarct volume, improving the blood‒brain barrier (BBB), and promoting functional restoration. Furthermore, the network pharmacology, LC-MS/MS, and molecular docking results revealed that tricin, quercetin, luteolin, kaempferol, and physcion were identified as the key active ingredients in Pushen that treated ischemic stroke. Mechanistically, these key ingredients could bind with the transcription factor c-Myc and thereby regulate the expression of Adora2a, Drd2, and Ppp1r1b, which are enriched in the cAMP signaling pathway. Additionally, Pushen improved the gut microbiota dysbiosis and reduced inosine levels in feces and serum, thereby reducing Adora2a expression in the brain. CONCLUSIONS Our study confirmed that Pushen was effective for treating ischemic stroke and has promising clinical applications.
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Affiliation(s)
- Yuan Zhang
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Ling Shen
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Jian Xie
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Lu Li
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Wen Xi
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Bin Li
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Ying Bai
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China
| | - Honghong Yao
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China; Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China; Institute of Life Sciences, Key Laboratory of Developmental Genes and Human Disease, Southeast University, Nanjing, Jiangsu, 210009, China.
| | - Shenyang Zhang
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China; Department of Neurology, The Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, China.
| | - Bing Han
- Department of Pharmacology, Jiangsu Provincial Key Laboratory of Critical Care Medicine, School of Medicine, Southeast University, Nanjing, Jiangsu, 210009, China.
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11
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Ma X, Xi W, Yang D, Zhao L, Yu W, He Y, Ni W, Gao Z. Collateral sensitivity between tetracyclines and aminoglycosides constrains resistance evolution in carbapenem-resistant Klebsiella pneumoniae. Drug Resist Updat 2023; 68:100961. [PMID: 37004351 DOI: 10.1016/j.drup.2023.100961] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 02/13/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023]
Abstract
AIMS The acquisition of resistance to one antibiotic may confer an increased sensitivity to another antibiotic in bacteria, which is an evolutionary trade-off between different resistance mechanisms, defined as collateral sensitivity (CS). Exploiting the role of CS in treatment design could be an effective method to suppress or even reverse resistance evolution. METHODS Using experimental evolution, we systematically studied the CS between aminoglycosides and tetracyclines in carbapenem-resistant Klebsiella pneumoniae (CRKP) and explored the underlying mechanisms through genomic and transcriptome analyses. The application of CS-based therapies for resistance suppression, including combination therapy and alternating antibiotic therapy, was further evaluated in vitro and in vivo. RESULTS Reciprocal CS existed between tetracyclines and aminoglycosides in CRKP. The increased sensitivity of aminoglycoside-resistant strains to tetracyclines was associated with the alteration of bacterial membrane potential, whereas the unbalanced oxidation-reduction process of tetracycline-resistant strains may lead to an increased bacterial sensitivity to aminoglycosides. CS-based combination therapy could efficiently constrain the evolution of CRKP resistance in vitro and in vivo. In addition, alternating antibiotic therapy can re-sensitize CRKP to previously resistant drugs, thereby maintaining the trade-off. CONCLUSIONS These results provide new insights into constraining the evolution of CRKP resistance through CS-based therapies.
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Affiliation(s)
- Xinqian Ma
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Deqing Yang
- Department of Pharmacy, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Lili Zhao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Wenyi Yu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Yukun He
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Wentao Ni
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China.
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, China.
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12
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Fan X, Wang X, She J, Niu X, Luo Y, Xi W, Zheng T, Wu Y. Higher serum triglyceride can predict recurrent coronary revascularization events in patients undergoing percutaneous coronary intervention with baseline LDL-C <55 mg/dL. J Investig Med 2023; 71:47-52. [PMID: 36655323 DOI: 10.1136/jim-2022-002401] [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] [Indexed: 01/21/2023]
Abstract
Patients with low baseline low-density lipoprotein cholesterol (LDL-C) but experiencing recurrent coronary revascularization events have been rarely investigated. In this retrospective cohort study, we enrolled patients undergoing percutaneous coronary intervention (PCI) with baseline LDL-C <55 mg/dL at the First Affiliated Hospital of Xi'an Jiaotong University between January and December 2017. Subsequent ischemia-driven coronary revascularization events and all-cause death were documented during a 4-year follow-up. Cox analysis was used to evaluate the association between baseline clinical characteristics and long-term events. As a result, among 388 patients (mean age 63 years; 79.1% male) enrolled, 32 patients underwent recurrent revascularization events, and 38 patients occurred all-cause death. After adjustment for age, diabetes mellitus, multi-vessel disease, and lipoprotein(a), multivariate Cox analysis showed that baseline serum triglyceride (TG) (HR 1.691, 95% CI 1.178 to 2.428, p=0.004) was an independent predictor of recurrent coronary revascularization events. Kaplan-Meier analysis revealed that a higher TG level (≥1.17 mmol/L, determined by receiver operating characteristic curve) was associated with increased risk of recurrent revascularization events than lower TG level (<1.17 mmol/L) (p=0.021). Female (HR 2.647, 95% CI 1.350 to 5.190, p=0.005) and previous atrial fibrillation (HR 3.163, 95% CI 1.403 to 7.132, p=0.006) were associated with increased risk of all-cause death. In conclusion, for patients undergoing PCI with baseline LDL-C <55 mg/dL, higher baseline TG can predict recurrent coronary revascularization events.
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Affiliation(s)
- Xiaojuan Fan
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Xiaoke Wang
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Jianqing She
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Xiaoqian Niu
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yongbai Luo
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
| | - Wen Xi
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Tao Zheng
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yue Wu
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.,Key Laboratory of Environment and Genes Related to Diseases, Ministry of Education, Xi'an, Shaanxi, China
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13
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Vijayraghavan S, Kozmin SG, Xi W, McCusker JH. A novel narnavirus is widespread in Saccharomyces cerevisiae and impacts multiple host phenotypes. G3 (Bethesda) 2022; 13:6957440. [PMID: 36560866 PMCID: PMC9911063 DOI: 10.1093/g3journal/jkac337] [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] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 11/27/2022] [Accepted: 12/02/2022] [Indexed: 12/24/2022]
Abstract
RNA viruses are a widespread, biologically diverse group that includes the narnaviridiae, a family of unencapsidated RNA viruses containing a single ORF that encodes an RNA-dependent RNA polymerase. In the yeast Saccharomyces cerevisiae, the 20S and 23S RNA viruses are well-studied members of the narnaviridiae, which are present at low intracellular copy numbers, unless induced by stress or unfavorable growth conditions, and are not known to affect host fitness. In this study, we describe a new S. cerevisiae narnavirus that we designate as N1199. We show that N1199 is uniquely present as a double-stranded RNA at a high level relative to other known members of this family in 1 strain background, YJM1199, and is present as a single-stranded RNA at lower levels in 98 of the remaining 100-genomes strains. Furthermore, we see a strong association between the presence of high level N1199 and host phenotype defects, including greatly reduced sporulation efficiency and growth on multiple carbon sources. Finally, we describe associations between N1199 abundance and host phenotype defects, including autophagy.
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Affiliation(s)
- Sriram Vijayraghavan
- Present address: Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Stanislav G Kozmin
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, 561 Research Drive 3020, Jones Bldg. Room 239, Durham, NC 27710, USA
| | - Wen Xi
- Department of Molecular Genetics and Microbiology, Duke University Medical Center, 561 Research Drive 3020, Jones Bldg. Room 239, Durham, NC 27710, USA
| | - John H McCusker
- Corresponding author: Department of Molecular Genetics and Microbiology, Duke University Medical Center, 561 Research Drive 3020, Jones Bldg. Room 239, Durham, NC 27710, USA.
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Ma L, Liao Y, Zhou B, Xi W. PerHeFed: A general framework of personalized federated learning for heterogeneous convolutional neural networks. World Wide Web 2022; 26:1-23. [PMID: 36531189 PMCID: PMC9743105 DOI: 10.1007/s11280-022-01119-x] [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] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/07/2022] [Accepted: 11/02/2022] [Indexed: 06/17/2023]
Abstract
In conventional federated learning, each device is restricted to train a network model of the same structure. This greatly hinders the application of federated learning where the data and devices are quite heterogeneous because of their different hardware equipment and communication networks. At the same time, existing studies have shown that transmitting all of the model parameters not only has heavy communication costs, but also increases risk of privacy leakage. We propose a general framework for personalized federated learning (PerHeFed), which enables the devices to design their local model structures autonomously and share sub-models without structural restrictions. In PerHeFed, a simple-but-effective mapping relation and a novel personalized sub-model aggregation method are proposed for heterogeneous sub-models to be aggregated. By dividing the aggregations into two primitive types (i.e., inter-layer and intra-layer), PerHeFed is applicable to any combination of heterogeneous convolutional neural networks, and we believe that this can satisfy the personalized requirements of heterogeneous models. Experiments show that, compared to the state-of-the-art method (e.g., FLOP), in non-IID data sets our method compress ≈ 50% of the shared sub-model parameters with only a 4.38% drop in accuracy on SVHN dataset and on CIFAR-10, PerHeFed even achieves a 0.3% improvement in accuracy. To the best of our knowledge, our work is the first general personalized federated learning framework for heterogeneous convolutional networks, even cross different networks, addressing model structure unity in conventional federated learning.
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Affiliation(s)
- Le Ma
- Xi’an Institute of High Technology, Xi’An, China
| | - YuYing Liao
- National University of Defense Technology, Changsha, China
| | - Bin Zhou
- National University of Defense Technology, Changsha, China
| | - Wen Xi
- National University of Defense Technology, Changsha, China
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15
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Xiao T, Zhang Y, Xi W, Wang R, Gong Y, He B, Wang H, Jin J. Rationally designing a Ti 3C 2T x/CNTs-Co 9S 8 heterostructure as a sulfur host with multi-functionality for high-performance lithium-sulfur batteries. Nanoscale 2022; 14:16139-16147. [PMID: 36259988 DOI: 10.1039/d2nr04526e] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Lithium-sulfur (Li-S) batteries have been regarded as potential next-generation batteries owing to their ultrahigh theoretical capacity and abundance of sulfur. However, polysulfide shuttling, poor electronic conductivity, and severe volume expansion limit their commercial prospects. In this work, we rationally constructed a 3D porous Ti3C2Tx/CNTs-Co9S8 heterostructure derived from a zeolite imidazole framework (ZIF)/Ti3C2Tx MXene composite via carbonization and subsequent sulfidation. In this 3D porous Ti3C2Tx/CNTs-Co9S8 heterostructure, the 3D porous Ti3C2Tx MXene structure can provide facilitated ion and electron transport, good structural stability, and polar bonds to anchor sulfur and polysulfides. The formed CNTs can enhance ion diffusion and electron transport. The Co9S8 nanoparticles can accelerate the conversion reaction of polysulfides to Li2S, which can further prevent polysulfide shuttling. The 3D porous structure can buffer the electrode volume change upon cycling. This rationally designed Ti3C2Tx/CNTs-Co9S8/S cathode exhibits a high initial capacity of 1389.8 mA h g-1 at 0.1C, good cyclic stability (730.7 mA h g-1 at 0.2C after 100 cycles), and excellent rate capacities (530.7 mA h g-1 at 1C). When the S loading was 2.5 mg cm-2, the Ti3C2Tx/CNTs-Co9S8/S cathode still exhibited a reversible capacity of 472.8 mA h g-1 at 0.5C after 300 cycles.
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Affiliation(s)
- Tuo Xiao
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Youfang Zhang
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
- Ministry of Education Key Laboratory for Green Preparation and Application of Functional Materials, Hubei University, Wuhan 430062, China
| | - Wen Xi
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Rui Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Yansheng Gong
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Beibei He
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Huanwen Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Jun Jin
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
- Shenzhen Research Institute, China University of Geosciences, Shenzhen 518000, China
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Sharen G, Li X, Sun J, Zhang L, Xi W, Zhao X, Han F, Jia L, A R, Cheng H, Hou M. Silencing eL31 suppresses the progression of colorectal cancer via targeting DEPDC1. J Transl Med 2022; 20:493. [PMID: 36309731 PMCID: PMC9617412 DOI: 10.1186/s12967-022-03663-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 09/25/2022] [Indexed: 11/10/2022] Open
Abstract
Background Colorectal cancer (CRC) is one of the most commonly diagnosed human malignancies. Ribosomal protein L31 (RPL31, aka eL31) is a component of the 60S large ribosomal subunit, and its expression pattern and functional role in CRC have not been reported. Methods Herein, we identified that eL31 protein level was dramatically increased in CRC tissues through using IHC analysis. More notably, elevated eL31 was associated with larger tumor size and shorter overall survival. Besides, we evaluated the effects of eL31 depletion on CRC cell phenotypes in vitro. Results The data indicated that eL31 knockdown restricted CRC cell proliferation, migration and colony formation whilst enhancing cell apoptosis. Importantly, eL31 was also essential for CRC tumor growth in vivo, as demonstrated by impaired tumor growth markers and reduced Ki67 levels in xenografts from eL31-depleted cells. In addition, our evidence indicated that DEP domain containing 1 (DEPDC1) was a potential downstream target of eL31 in regulating CRC. Consistently, DEPDC1 depletion restrained CRC cell proliferation and migration, as well as facilitated cell apoptosis. More interestingly, DEPDC1 depletion could reverse the promotion effects of eL31 elevation on CRC cells. Conclusions Identification of eL31’s function in CRC may pave the way for future development of more specific and more effective targeted therapy strategies against CRC. Supplementary Information The online version contains supplementary material available at 10.1186/s12967-022-03663-6.
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Xiao T, Jin J, Zhang Y, Xi W, Wang R, Gong Y, He B, Wang H. Rational construction of 2D/2D Ti3C2Tx/NiCo MOF heterostructure for highly efficient Li+ storage. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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18
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Xi W, Jin J, Zhang Y, Wang R, Gong Y, He B, Wang H. Hierarchical MXene/transition metal oxide heterostructures for rechargeable batteries, capacitors, and capacitive deionization. Nanoscale 2022; 14:11923-11944. [PMID: 35920652 DOI: 10.1039/d2nr02802f] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
2D MXenes have attracted considerable attention due to their high electronic conductivity, tunable metal compositions, functional termination groups, low ion diffusion barriers, and abundant active sites. However, MXenes suffer from sheet stacking and partial surface oxidation, limiting their energy storage and water treatment development. To solve these problems and enhance the performance of MXenes in practical applications, various hierarchical MXene/transition metal oxide (MXene/TMO) heterostructures are rationally designed and constructed. The hierarchical MXene/TMO heterostructures can not only prevent the stacking of MXene sheets and improve the electronic conductivity and buffer the volume change of TMOs during the electrochemical reaction process. The synergistic effect of conductive MXenes and active TMOs also makes MXene/TMO heterostructures promising electrode materials for energy storage and seawater desalination. This review mainly introduces and discusses the recent research progress in MXene/TMO heterostructures, focusing on their synthetic strategies, heterointerface engineering, and applications in rechargeable batteries, capacitors, and capacitive deionization (CDI). Finally, the key challenges and prospects for the future development of the MXene/TMO heterostructures in rechargeable batteries, capacitors, and CDI are proposed.
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Affiliation(s)
- Wen Xi
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Jun Jin
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Youfang Zhang
- School of Materials Science and Engineering, Hubei University, Wuhan 430062, China
| | - Rui Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Yansheng Gong
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Beibei He
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
| | - Huanwen Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China.
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19
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Park S, Wang X, Xi W, Richardson R, Laue TM, Denis CL. The non-prion SUP35 preexists in large chaperone-containing molecular complexes. Proteins 2022; 90:869-880. [PMID: 34791707 PMCID: PMC8816864 DOI: 10.1002/prot.26282] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 07/04/2021] [Revised: 11/07/2021] [Accepted: 11/09/2021] [Indexed: 12/26/2022]
Abstract
Prions, misfolded proteins that aggregate, cause an array of progressively deteriorating conditions to which, currently, there are no effective treatments. The presently accepted model indicates that the soluble non-prion forms of prion-forming proteins, such as the well-studied SUP35, do not exist in large aggregated molecular complexes. Here, we show using analytical ultracentrifugation with fluorescent detection that the non-prion form of SUP35 exists in a range of discretely sized soluble complexes (19S, 28S, 39S, 57S, and 70S-200S). Similar to the [PSI+] aggregated complexes, each of these [psi-] complexes associates at stoichiometric levels with a large variety of molecular chaperones: HSP70 proteins comprise the major component. Another yeast prion-forming protein, RNQ1 (known to promote the production of the prion SUP35 state), is also present in SUP35 complexes. These results establish that the non-prion SUP35, like its prion form, is predisposed to form large molecular complexes containing chaperones and other prion-forming proteins. These results agree with our previous studies on the huntingtin protein. That the normal forms for aggregation-prone proteins may preexist in large molecular complexes has important ramifications for the progression of diseases involving protein aggregation.
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20
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Zhuo X, Bai K, Wang Y, Liu P, Xi W, She J, Liu J. Long-chain noncoding RNA-GAS5/hsa-miR-138-5p attenuates high glucose-induced cardiomyocyte damage by targeting CYP11B2. Biosci Rep 2021; 41:BSR20202232. [PMID: 33682891 PMCID: PMC8485392 DOI: 10.1042/bsr20202232] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 11/16/2020] [Accepted: 11/24/2020] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVE Diabetic cardiomyopathy (DCM) is one of the complications experienced by patients with diabetes. In recent years, long noncoding RNAs (lncRNAs) have been investigated because of their role in the progression of various diseases, including DCM. The purpose of the present study was to explore the role of lncRNA GAS5 in high glucose (HG)-induced cardiomyocyte injury and apoptosis. MATERIALS AND METHODS We constructed HG-induced AC16 cardiomyocytes and a streptozotocin (STZ)-induced rat diabetes model. GAS5 was overexpressed and knocked out at the cellular level, and GAS5 was knocked down by lentiviruses at the animal level to observe its effect on myocardial injury. Real-time quantitative polymerase chain reaction (RT-qPCR) was used to detect the expression of GAS5. Cell proliferation and apoptosis after GAS5 knockout were detected by CCK-8, TUNEL, and flow cytometry assays. ELISA was used to detect the changes in myocardial enzyme content in cells and animal myocardial tissues during the action of GAS5 on myocardial injury. RESULTS GAS5 expression was up-regulated in HG-treated AC16 cardiomyocytes and the rat diabetic myocardial injury model. The down-regulation of GAS5 could inhibit HG-induced myocardial damage. This work proved that the down-regulation of GAS5 could reverse cardiomyocyte injury and apoptosis by targeting miR-138 to down-regulate CYP11B2. CONCLUSION We confirmed for the first time that the down-regulation of GAS5 could reverse CYP11B2 via the miR-138 axis to reverse HG-induced cardiomyocyte injury. This research might provide a new direction for explaining the developmental mechanism of DCM and potential targets for the treatment of myocardial injury.
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Affiliation(s)
- Xiaozhen Zhuo
- Department of Cardiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
| | - Kai Bai
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
| | - Yingxian Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
| | - Peining Liu
- Department of Cardiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
| | - Wen Xi
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
| | - Jianqing She
- Department of Cardiology, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
| | - Junhui Liu
- Department of Clinical Laboratory, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi 710061, China
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21
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Liu CY, Xi W, Zhou DX, Gong PH, Li J, Xu Y. [Pulmonary embolism secondary to osteosarcoma: a case report and literature review]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:920-922. [PMID: 34530601 DOI: 10.3760/cma.j.cn112148-20201014-00815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- C Y Liu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - W Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - D X Zhou
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - P H Gong
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - J Li
- Emergency Department, Peking University People's Hospital, Beijing 100044, China
| | - Y Xu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
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22
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Fan ZX, Xi W, Miao XY, Li LY, Miao GY. Circ_NCKAP1 promotes skin basal cell carcinoma progression by sponging the miR-148b-5p/HSP90 axis. Eur Rev Med Pharmacol Sci 2021; 25:5355-5364. [PMID: 34533810 DOI: 10.26355/eurrev_202109_26642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Skin basal cell carcinoma (BCC) is the most common malignant skin tumor. Recent studies demonstrated that circular RNAs (circRNAs) are implicated in tumorigenesis and may represent potential therapeutic targets. The aim of the present study was to explore the expression profiles of circRNAs and their role in skin BCC. MATERIALS AND METHODS Three pairs of skin BCC tissues and adjacent tissues were used to perform a circRNA microarray for screening of circRNA expression profiles. Circ_NCKAP1 was selected as a target circRNA by RT-qPCR verification and bioinformatics analysis. The effect of circ_NCKAP1 knockdown on cell proliferation and apoptosis was assessed using CCK8 and Annexin V-FITC/PI assays, and its regulation over the miR-148b-5p/HSP90 axis was assessed by dual-luciferase reporter assay. RESULTS Circ_NCKAP1 was found to be significantly upregulated in skin BCC tissues (p<0.05). In vitro loss-of-function assays demonstrated that circ_NCKAP1 knockdown markedly inhibited cell proliferation and promoted cell apoptosis (p<0.05). Moreover, Dual-Luciferase reporter assay identified that circ_NCKAP1 could bind to miR-148b-5p directly, and HSP90 was targeted by miR-148b-5p. CONCLUSIONS Circ_NCKAP1 can promote skin BCC progression by sponging the miR-148b-5p/HSP90 axis, and circ_NCKAP1 may be a potential target for skin BCC therapy.
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Affiliation(s)
- Z-X Fan
- Department of Dermatology, Affiliated Hospital of Hebei University of Engineering, Handan, Heibei, China.
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23
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Ni W, Yang D, Guan J, Xi W, Zhou D, Zhao L, Cui J, Xu Y, Gao Z, Liu Y. In vitro and in vivo synergistic effects of tigecycline combined with aminoglycosides on carbapenem-resistant Klebsiella pneumoniae. J Antimicrob Chemother 2021; 76:2097-2105. [PMID: 33860309 DOI: 10.1093/jac/dkab122] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 03/15/2021] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES Carbapenem-resistant Klebsiella pneumoniae (CR-KP) infections represent severe threats to public health worldwide. The aim of this study was to assess potential synergistic interaction between tigecycline and aminoglycosides via in vitro and in vivo studies. METHODS Antibiotic resistance profiles and molecular characteristics of 168 CR-KP clinical isolates were investigated by susceptibility testing, PCR and MLST. Chequerboard tests and time-kill assays were performed for 20 CR-KP isolates to evaluate in vitro synergistic effects of tigecycline combined with aminoglycosides. A tissue-cage infection model of rats was established to evaluate in vivo synergistic effects. Different doses of tigecycline and aminoglycosides alone or in combination were administered for 7 days via tail vein injection. Antibiotic efficacy was evaluated in tissue-cage fluid and emergence of resistance was screened. RESULTS The chequerboard tests showed that this combination displayed synergistic or partial synergistic activity against CR-KP. The time-kill assays further demonstrated that strong synergistic effects of such a combination existed against isolates that were susceptible to both drugs but for resistant isolates no synergy was observed if clinical pharmacokinetics were taken into consideration. The in vivo study showed that the therapeutic effectiveness of combination therapies was better than that of monotherapy for susceptible isolates, suggesting in vivo synergistic effects. Furthermore, combinations of tigecycline with an aminoglycoside showed significant activity in reducing the occurrence of tigecycline-resistant mutants. CONCLUSIONS Compared with single drugs, tigecycline combined with aminoglycosides could exert synergistic effects and reduce the emergence of tigecycline resistance. Such a combination might be an effective alternative when treating CR-KP infections in clinical practice.
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Affiliation(s)
- Wentao Ni
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Deqing Yang
- Division of Pulmonary Diseases, State Key Laboratory of Biotherapy of China, and Department of Respiratory and Critical Care Medicine, West China Hospital of Sichuan University, Chengdu 610041, China
| | - Jie Guan
- Clinical Laboratory, Peking University First Hospital, Beijing 100034, China
| | - Wen Xi
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Dexun Zhou
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Lili Zhao
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Junchang Cui
- Department of Respiratory Diseases, Chinese PLA General Hospital, Beijing 100853, China
| | - Yu Xu
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Zhancheng Gao
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Youning Liu
- Department of Respiratory Diseases, Chinese PLA General Hospital, Beijing 100853, China
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24
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Xi W, Song N, Yan Q, Liang H, Zhang W. The analysis of the effects of Liuwei Dihuang decoction on aging-related metabolites and metabolic pathways in naturally aging mice by ultra-performance liquid chromatography quadruple time-of-light mass spectrometry. J Physiol Pharmacol 2021; 72. [PMID: 34810292 DOI: 10.26402/jpp.2021.3.09] [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] [Received: 04/20/2021] [Accepted: 06/30/2021] [Indexed: 06/13/2023]
Abstract
Liuwei Dihuang decoction (LWDH) has been used to treat age-related diseases in Asia for thousands of years. Its effect is significant, but the mechanism is not entirely understood. The development and maturity of metabonomics technology have created a new way to understand its effects. In this study, 20-month-old naturally aging mice were used as the research subjects. Mice were randomly divided into the young group, elderly group, vitamin E group, and LWDH group, with 10 mice in each group. The UPLC-Q-TOF-MS technique analyzed the changes in plasma metabolism of these mice. Principal component analysis (PCA) and orthogonal partial least-squares discriminant analysis (OPLS-DA) were used to study metabolic markers and metabolic pathways. Compared with the elderly group, the organ index and weightbearing swimming time of the LWDH and vitamin E groups increased (P ≤ 0.01). The results show that LWDH can benignly regulate the expression level of 11 aging-associated metabolites in aged mice and alleviate the aging state of mice. These metabolites mainly affect the metabolism of glutathione, unsaturated fatty acid biosynthesis, pyrimidine, selenium, pentose phosphate, arginine, and proline.
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Affiliation(s)
- W Xi
- Jangxi University of Traditional Chinese Medicine, Nachchang, China
| | - N Song
- Jangxi University of Traditional Chinese Medicine, Nachchang, China
| | - Q Yan
- Heilongjiang University of Chinese Medicine, Harbin, China
| | - H Liang
- Heilongjiang University of Chinese Medicine, Harbin, China.
| | - W Zhang
- Jangxi University of Traditional Chinese Medicine, Nachchang, China
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Zhang S, Zhou S, Yang X, Xi W, Zheng K, Chu C, Ju M, Liu L. Effect of operating parameters on hydrothermal liquefaction of corn straw and its life cycle assessment. Environ Sci Pollut Res Int 2020; 27:6362-6374. [PMID: 31873892 DOI: 10.1007/s11356-019-07267-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
As the shortage of non-renewable fossil fuels, the renewable fuels should be further developed. Biomass energy has emerged the great utilization potential, and liquefaction of biomass is a typical technology. This paper studied the effect of the operation parameters on the hydrothermal liquefaction of corn straw using a batch reactor, including liquefaction temperature, initial pressure, retention time, solvent, and catalyst. The optimal liquefaction conditions for corn straw were 300 °C under 4 MPa for 15 min using the mixture of water and methanol as the solvent. After the addition of catalyst, NKC-11 catalyst showed the excellent performance, and the primary components were phenol and derivatives, alkane, furan, and the low concentration of organic acids. Lastly, the life cycle assessment on the hydrothermal liquefaction of corn straw for bio-oil production was executed. The results of LCA suggested that a net 1.31 kg of CO2 equivalent was produced for 1 kg of bio-oil product without considering syngas, while the value changed to 13.03 kg with considering syngas. Moreover, the results of sensitivity analysis further suggested that the syngas was a key factor on the environmental impacts in the hydrothermal liquefaction of corn straw process.
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Affiliation(s)
- Shiqiu Zhang
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin, 300350, People's Republic of China
| | - Shengnan Zhou
- Key Laboratory of Cardiovascular Remodeling and Function Research, Qilu Hospital, Shandong University, Jinan, 250014, Shandong, People's Republic of China
| | - Xue Yang
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin, 300350, People's Republic of China
| | - Wen Xi
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin, 300350, People's Republic of China
| | - Kui Zheng
- Analytical and Testing Center, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, People's Republic of China
| | - Chunli Chu
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin, 300350, People's Republic of China
| | - Meiting Ju
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin, 300350, People's Republic of China.
| | - Le Liu
- College of Environmental Science and Engineering, Nankai University, 38 Tongyan Road, Jinnan District, Tianjin, 300350, People's Republic of China.
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Liu P, Liu J, Wu Y, Xi W, Wei Y, Yuan Z, Zhuo X. Zinc supplementation protects against diabetic endothelial dysfunction via GTP cyclohydrolase 1 restoration. Biochem Biophys Res Commun 2020; 521:1049-1054. [PMID: 31732151 DOI: 10.1016/j.bbrc.2019.11.046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Accepted: 11/06/2019] [Indexed: 12/15/2022]
Abstract
This study explored whether zinc supplementation alleviates diabetic endothelial dysfunction and the possible mechanisms underlying. We found that high glucose exposure significantly increased reactive oxygen species (ROS) and decreased guanosine 5'-triphosphate cyclohydrolase 1 (GTPCH1) and tetrahydrobiopterin (BH4) levels in bovine aortic endothelial cells (BAECs) in a time-dependent manner. High glucose increased zinc release from GTPCH1 in a similar trend. Zinc supplementation restored GTPCH1 and BH4 levels and blocked ROS accumulation in both BACEs and wild type GTPCH1 transfected HEK293 cells, but not in the zinc-free C141R mutant of GTPCH1 transfected ones. In vivo experiments showed that exogenous supplementation of zinc to streptozotocin (STZ)-induced diabetic mice partially improved the impaired maximal endothelium-dependent vasorelaxation, reversed the aberrant reduction of GTPCH1 and BH4, and suppressed the elevation of ROS in the aortas. In conclusion, our study demonstrated a novel mechanism that via GTPCH1 restoration zinc supplementation exerts a protective benefit on diabetic endothelial dysfunction.
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Affiliation(s)
- Peining Liu
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Junhui Liu
- Department of Clinical Laboratory, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yue Wu
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Molecular Cardiology, Shaanxi Province, Xi'an, Shaanxi, China
| | - Wen Xi
- Department of Clinical Laboratory, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Yuanyuan Wei
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China
| | - Zuyi Yuan
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Molecular Cardiology, Shaanxi Province, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi, China.
| | - Xiaozhen Zhuo
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi, China; Key Laboratory of Environment and Genes Related to Diseases, Xi'an Jiaotong University, Ministry of Education, Xi'an, Shaanxi, China.
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Ni W, Bao J, Yang D, Xi W, Wang K, Xu Y, Zhang R, Gao Z. Potential of serum procalcitonin in predicting bacterial exacerbation and guiding antibiotic administration in severe COPD exacerbations: a systematic review and meta-analysis. Infect Dis (Lond) 2019; 51:639-650. [PMID: 31355690 DOI: 10.1080/23744235.2019.1644456] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Background: The value of procalcitonin (PCT) in the diagnosis of bacterial infections and for determining antibiotic usage among patients with acute exacerbations of chronic obstructive pulmonary disease (AECOPD) is currently unclear. Methods: We systematically reviewed the literature and selected studies that evaluated PCT as a biomarker for predicting bacterial infection and compared PCT-based protocols to determine its application in the initiation or discontinuation of antibiotics. Guidance for systematic reviews from Cochrane and the GRADE were followed to perform this study. Data were pooled and analyzed by using a random-effects or a fixed-effects model based on the heterogeneity. Results: The pooled sensitivity and specificity of PCT in diagnosing respiratory bacterial infections were 0.60 and 0.76, respectively, with the area under the summary receiver operating characteristic curve of 0.77. Subgroup analysis showed that the sensitivity and specificity of PCT for patients in ICU were 0.48 and 0.69, respectively. PCT-based protocols decreased antibiotic prescription (relative risk = 0.66, 95% CI: 0.62-0.71) and total antibiotic exposure (mean difference = -2.60, 95% CI: -4.48-0.72), without affecting clinical outcomes such as treatment failure, length of hospitalization and rates of re-exacerbation or overall mortality. Conclusions: PCT has a moderate ability to distinguish bacterial respiratory infection in patients with AECOPD. PCT-guided algorithm can reduce unnecessary administration of antibiotics without increasing adverse outcomes. However, for patients requiring admission in the ICU, PCT may have a poor diagnostic value, and the PCT-guided algorithm may not effectively and safely reduce the antibiotic exposure.
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Affiliation(s)
- Wentao Ni
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
| | - Jing Bao
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
| | - Donghong Yang
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
| | - Wen Xi
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
| | - Keqiang Wang
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
| | - Yu Xu
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
| | - Rongbao Zhang
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
| | - Zhancheng Gao
- a Department of Respiratory and Critical Care Medicine, Peking University People's Hospital , Beijing , China
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Zhao T, Zheng Y, Hao D, Jin X, Luo Q, Guo Y, Li D, Xi W, Xu Y, Chen Y, Gao Z, Zhang Y. Blood circRNAs as biomarkers for the diagnosis of community-acquired pneumonia. J Cell Biochem 2019; 120:16483-16494. [PMID: 31286543 DOI: 10.1002/jcb.28863] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 12/10/2018] [Revised: 02/13/2019] [Accepted: 02/21/2019] [Indexed: 01/01/2023]
Abstract
Circular RNAs (circRNAs) have been reported as effective diagnostic and therapeutic biomarkers in many diseases, but the potential of using this easy-to-monitor and highly stable materials for diagnosing Community-acquired pneumonia (CAP) remains unexplored. Here, aiming to identify potential CAP-related circRNAs in peripheral blood and seeking to deepen the understanding of how circRNA-miRNA-mRNA regulatory networks may contribute to CAP, we applied microarrays profiling analysis and identified 8296 differentially expressed (DE) circRNAs between patients with CAP (n = 6) and healthy controls (n = 6). Subsequently, we validated the accumulation trends for the top 100 DE circRNAs based on qPCR in an independent validation cohort (30 patients vs 30 controls), and ultimately identified a panel of four circRNAs that perform extremely well as sensitive and specific biomarkers for diagnosing CAP: hsa_circ_0018429 (area under the curve [AUC] = 0.8216), hsa_circ_0026579 (AUC = 0.7733), hsa_circ_0125357 (AUC = 0.7730), and hsa_circ_0099188 (AUC = 0.6978); combined as a panel (AUC = 0.8776). In addition, hsa_circ_0026579 exhibited good performance in differentiating viral from bacterial or mixed infection, with an AUC of 0.863. We also identified 10 miRNAs that most likely to interact with these four circRNAs, and then predicted 205 mRNA target genes. The KEGG pathway enrichment analysis suggested highly plausible functional implications related to inflammation and to virus-infection-related signaling pathways (such as HTLV-1 infection and hepatitis B infection). Thus, we generated a genetic network of potential CAP-related regulatory interactions that should inform future hypothesis-driven research into the causes and potential treatment of this widespread and frequently fatal disease.
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Affiliation(s)
- Tian Zhao
- National Engineering Research Center for Beijing Biochip Technology, Beijing, China
| | - YaLi Zheng
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - DengZai Hao
- National Engineering Research Center for Beijing Biochip Technology, Beijing, China
| | - Xuesong Jin
- National Engineering Research Center for Beijing Biochip Technology, Beijing, China
| | - QiongZhen Luo
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - YaTao Guo
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - DaiXi Li
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Wen Xi
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Yu Xu
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - YuSheng Chen
- Department of Pulmonary and Critical Care Medicine, Fujian Provincial Hospital, Fuzhou, China
| | - ZhanCheng Gao
- Department of Pulmonary and Critical Care Medicine, Peking University People's Hospital, Beijing, China
| | - Yan Zhang
- National Engineering Research Center for Beijing Biochip Technology, Beijing, China
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Wang B, Duan YX, Wang WF, Liu ZQ, Li XJ, Liu Y, Li SB, Xi W. Greenhouse gas fluxes at different growth stages of biological soil crusts in eastern Hobq desert, China. Ying Yong Sheng Tai Xue Bao 2019; 30:857-866. [PMID: 30912378 DOI: 10.13287/j.1001-9332.201903.004] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
We analyzed greenhouse gas fluxes at the different growth stages of algae and lichen crusts in fixed sand with mobile dune as control in the eastern Hobq Desert, China, using the spatio-temporal substitution method. We explored the correlation of these fluxes with environmental factors and with biological soil crust growth. The results showed that variation of CO2 fluxes followed the order: lichen crust (128.5 mg·m-2·h-1) > algae crust (70.2 mg·m-2·h-1) > mobile dune (48.2 mg·m-2·h-1). CH4 absorption rates were in the following order: lichen crust (30.4 μg·m-2·h-1) > algae crust (21.2 μg·m-2·h-1) > mobile dune (18.2 μg·m-2·h-1). The N2O fluxes were in the following order: lichen crust (6.6 μg·m-2·h-1) > algae crust (5.4 μg·m-2·h-1) > mobile dune (2.5 μg·m-2·h-1). CO2 emission had obvious seasonal variation, with higher emission in the growing season. CH4 and N2O fluxes had no seaonal variation. CH4 absorption mainly occurred in the growing season and N2O emission mainly occurred in non-growing season. Contents of soil total nitrogen and organic carbon and the abundance of microorganisms were important factors affecting greenhouse gas fluxes. Hydrothermic factors were important for soil CO2 emission, but not for CH4 and N2O fluxes. The cumulative greenhouse gas emissions were gradually increased with vegetation restoration and the development of biological soil crust. The global warming potential increased following an order: lichen crust (1135.7 g CO2-e·m-2·a-1) > algae crust (626.5 g CO2-e·m-2·a-1) > mobile dune (422.7 g CO2-e·m-2·a-1).
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Affiliation(s)
- Bo Wang
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
| | - Yu Xi Duan
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
| | - Wei Feng Wang
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
| | - Zong Qi Liu
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
| | - Xiao Jing Li
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
| | - Yuan Liu
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
| | - Shao Bo Li
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
| | - Wen Xi
- Inner Mongolia Forestry Research Institute, Hohhot 010010, China
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Abstract
BACKGROUND Uterine fibroids represent the most common gynecological benign tumors in reproductive females. Acupuncture has been applied as a therapeutic modality in China to treat uterine fibroids. However, currently, few critical systematic reviews regarding the effect of acupuncture on uterine fibroids have been published. Our proposed review aims to evaluate the current evidence on the efficacy of acupuncture for uterine fibroids. METHODS A total of 7 databases were searched from their inception to December 2018, including PubMed, Medline, Embase, the Cochrane Central Register of Controlled Trials, the Chinese National Knowledge Infrastructure database, the Chinese Biomedical database, and the Wanfang database. The primary outcomes will be reduction in uterine volume and number of fibroids. Secondary outcomes are pelvic or low-back pain, assessed by Visual Analog Scale (VAS); Irregular menstrual periods; Low-abdominal pressure symptoms such as frequent or urgent urination, or constipation and adverse events. Data synthesis will be computed by RevManV.5.3.5 software when a data-analysis is allowed. Methodological quality will be evaluated with the risk of bias according to Cochrane Handbook. RESULTS This study will provide high-quality evidence of acupuncture for uterine fibroids. CONCLUSION The conclusion of this systematic review will provide evidence to judge whether acupuncture is an effective therapeutic intervention for patients with uterine fibroids. TRIAL REGISTRATION NUMBER PROSPERO CRD42019120484.
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Affiliation(s)
- Tong Liu
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
| | - Jiani Yu
- Department of Rehabilitation Medicine, Guangdong Provincial Hospital of Traditional Chinese Medicine, Guangzhou, Guangdong, China
| | - Weichuan Kuang
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
| | - Xiaoyin Wang
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
| | - Jiang Ye
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
| | - Xiaojia Qiu
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
| | - Wen Xi
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
| | - Yao Zeng
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
| | | | - Yue Liu
- Department of Acupuncture and Rehabilitation, GuangDong Second Hospital of Traditional Chinese Medicine
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Wang K, Xi W, Yang D, Zheng Y, Zhang Y, Chen Y, Yan C, Tian G, An S, Li X, An F, Du J, Hu K, Cao J, Ren L, Huang F, Gao Z. Erratum to rhinovirus is associated with severe adult community-acquired pneumonia in China. J Thorac Dis 2018; 10:E861. [PMID: 30746280 DOI: 10.21037/jtd.2018.11.11] [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: 11/06/2022]
Abstract
[This corrects the article DOI: 10.21037/jtd.2017.10.107.].
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Affiliation(s)
- Keqiang Wang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Donghong Yang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Yali Zheng
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Yaqiong Zhang
- Department of Respiratory and Critical Care Medicine, Peking University International Hospital, Beijing 102206, China
| | - Yusheng Chen
- Department of Respiratory Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Chunliang Yan
- Department of Respiratory Medicine, Beijing Aerospace General Hospital, Beijing 100076, China
| | - Guizhen Tian
- Department of Respiratory Medicine, 263 Hospital of the Chinese People's Liberation Army, Beijing 101149, China
| | - Shuchang An
- Department of Respiratory Medicine, The First Hospital of Tsinghua University, Beijing 100016, China
| | - Xiangxin Li
- Department of Respiratory Medicine, Beijing Changping Hospital, Beijing 102200, China
| | - Fucheng An
- Department of Respiratory Medicine, Beijing Mentougou District Hospital, Beijing 102300, China
| | - Juan Du
- Department of Respiratory Medicine, The Affiliated Hospital of Guiyang Medical College, Guiyang 550004, China
| | - Ke Hu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Jie Cao
- Department of Respiratory Medicine, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Lili Ren
- MOH Key Laboratory of Systems Biology of Pathogens and Christophe Mérieux Laboratory, IPB, CAMS-Fondation Mérieux, Institute of Pathogen Biology (IPB), Chinese Academy of Medical Sciences (CAMS) & Peking Union Medical College, Beijing 100730, China
| | - Fang Huang
- Beijing Center for Disease Prevention and Control, Beijing 100013, China
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
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Shang Y, Zhao L, Xi W, Wen G, Gao Z. [Primary culture and identification of adult dermal fibroblasts]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2018; 34:824-828. [PMID: 30463655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Objective To establish a method for primary culture of adult dermal fibroblasts. Methods Fresh skin tissues were digested with dispase II to separate the epidermis from dermis. Then fibroblasts were isolated from the dermis by tissue-adhesive and type I collagenase digestion method respectively. The growth of cells was observed under an inverted phase contrast microscope. the expression of vimentin in cultured cells was detected by immunofluorescence cytochemical staining to identify cell type and assess the purity of fibroblasts. The proliferation activity of fibroblasts was analyzed by MTT assay and drew growth curve. Cell cycle distribution was detected by flow cytometry. Results The fibroblasts were cultured for 48 hours, and more than 95% adherent cells were obtained by collagen protease separation. At the same time, the cells began to grow from the adherent wall at the edge of the tissue block. A large number of fibroblasts adherently grew on day 5. The cells grew rapidly, and on day 7, the layers of proliferating cells were covered in petri dishes. A small number of epithelial cells were mixed in fibroblasts obtained from the tissue-adhesive method, while the vimentin positive rate of cells isolated by collagenase digestion method was nearly 100%, almost all of which were fibroblasts. Conclusion Both collagenase digestion and tissue-adhesive method are rapid, economical and effective methods for obtaining dermal fibroblasts. Collagenase digestion method can prevent epithelial cell contamination more effectively, and the isolated dermal fibroblasts have good proliferative capacity.
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Affiliation(s)
- Ying Shang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Lili Zhao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Guangdong Wen
- Department of dermatology, Peking University People's Hospital, Beijing 100044, China
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China. *Corresponding author, E-mail:
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Ning P, Zheng Y, Luo Q, Liu X, Kang Y, Zhang Y, Zhang R, Xu Y, Yang D, Xi W, Wang K, Chen Y, An S, Gao Z. Metabolic profiles in community-acquired pneumonia: developing assessment tools for disease severity. Crit Care 2018; 22:130. [PMID: 29759075 PMCID: PMC5952829 DOI: 10.1186/s13054-018-2049-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 04/23/2018] [Indexed: 01/11/2023]
Abstract
Background This study aimed to determine whether community-acquired pneumonia (CAP) had a metabolic profile and whether this profile can be used for disease severity assessment. Methods A total of 175 individuals including 119 CAP patients and 56 controls were enrolled and divided into two cohorts. Serum samples from a discovery cohort (n = 102, including 38 non-severe CAP, 30 severe CAP, and 34 age and sex-matched controls) were determined by untargeted ultra-high-performance liquid chromatography with tandem mass spectrometry (LC-MS/MS)-based metabolomics. Selected differential metabolites between CAP patients versus controls, and between the severe CAP group versus non-severe CAP group, were confirmed by targeted mass spectrometry assays in a validation cohort (n = 73, including 32 non-severe CAP, 19 severe CAP and 22 controls). Pearson’s correlation analysis was performed to assess relationships between the identified metabolites and clinical severity of CAP. The area under the curve (AUC), sensitivity and specificity of the metabolites for predicting the severity of CAP were also investigated. Results The metabolic signature was markedly different between CAP patients and controls. Fifteen metabolites were found to be significantly dysregulated in CAP patients, which were mainly mapped to the metabolic pathways of sphingolipid, arginine, pyruvate and inositol phosphate. The alternation trends of five metabolites among the three groups including sphinganine, p-Cresol sulfate, dehydroepiandrosterone sulfate (DHEA-S), lactate and l-arginine in the validation cohort were consistent with those in the discovery cohort. Significantly lower concentrations of sphinganine, p-Cresol sulfate and DHEA-S were observed in CAP patients than in controls (p < 0.05). Serum lactate and sphinganine levels were positively correlated with confusion, urea level, respiratory rate, blood pressure, and age > 65 years (CURB-65), pneumonia severity index (PSI) and Acute Physiology and Chronic Health Evaluation II (APACHE II) scores, while DHEA-S inversely correlated with the three scoring systems. Combining lactate, sphinganine and DHEA-S as a metabolite panel for discriminating severe CAP from non-severe CAP exhibited a better AUC of 0.911 (95% confidence interval 0.825–0.998) than CURB-65, PSI and APACHE II scores. Conclusions This study demonstrates that serum metabolomics approaches based on the LC-MS/MS platform can be applied as a tool to reveal metabolic changes during CAP and establish a metabolite signature related to disease severity. Trial registration ClinicalTrials.gov, NCT03093220. Registered retrospectively on 28 March 2017. Electronic supplementary material The online version of this article (10.1186/s13054-018-2049-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Pu Ning
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Yali Zheng
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Qiongzhen Luo
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Xiaohui Liu
- National Protein Science Technology Center, Tsinghua University, Beijing, China.,School of Life Sciences, Tsinghua University, Beijing, China
| | - Yu Kang
- CAS Key Laboratory of Genome Sciences and Information, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Yan Zhang
- National Engineering Research Center for Beijing Biochip Technology, Beijing, China
| | - Rongbao Zhang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Yu Xu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Donghong Yang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Keqiang Wang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China
| | - Yusheng Chen
- Department of Respiratory Medicine, Fujian Provincial Hospital, Fuzhou, China
| | - Shuchang An
- Department of Respiratory Medicine, First Hospital of Tsinghua University, Beijing, China
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing, 100044, China.
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Yu H, Feng G, Feng J, Zhou B, Xi W, Yan F, Wu B, Ying G, Zhang J, Chen H, Chen J. Abstract No. 526 A rabbit model of gastric cancer established by injecting VX2 tumor pieces through left gastric artery catheterization. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Neelakantan P, Khan K, Li KY, Shetty H, Xi W. Effectiveness of supplementary irrigant agitation with the Finisher GF Brush on the debridement of oval root canals instrumented with the Gentlefile or nickel titanium rotary instruments. Int Endod J 2018; 51:800-807. [PMID: 29363136 DOI: 10.1111/iej.12892] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 01/18/2018] [Indexed: 12/15/2022]
Abstract
AIM To examine the efficacy of a novel supplementary irrigant agitating brush (Finisher GF Brush, MedicNRG, Kibbutz Afikim, Israel) on the debridement of root canals prepared with a novel stainless steel rotary instrumentation system (Gentlefile; MedicNRG), or nickel titanium rotary instruments in oval root canals. METHODOLOGY Mandibular premolars (n = 72) were selected and divided randomly into three experimental groups (n = 24) after microCT scanning: group 1, canal preparation to rotary NiTi size 20, .04 taper (R20); group 2, rotary NiTi to size 25, .04 taper (R25) and group 3, Gentlefile size 23, .04 taper (GF). Specimens were subdivided into two subgroups: subgroup A, syringe-and-needle irrigation (SNI); subgroup B, Finisher GF Brush (GB). Ten untreated canals served as controls. Specimens were processed for histological evaluation, and the remaining pulp tissue (RPT) was measured. Data were analysed using Mann-Whitney and Kruskal-Wallis tests (P = 0.05). RESULTS All experimental groups had significantly less RPT than the control (P < 0.05). Group 3B (GF-GB) had significantly less RPT than groups 1B (R20-GB) and 2B (R25-GF; P < 0.05). When irrigated with SNI, there was no significant difference in the RPT between the three groups (P > 0.05). When instrumented with R20, there was no significant difference between SNI and GF (P < 0.05) whilst GB had significantly less RPT than SNI for R25 (P < 0.05). CONCLUSIONS Supplementary irrigant agitation with the Finisher GF Brush improved the debridement of canals prepared with Gentlefile and size 25, .04 taper rotary NiTi. Root canal debridement did not significantly differ between the instruments when syringe irrigation was used.
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Affiliation(s)
- P Neelakantan
- Discipline of Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR
| | - K Khan
- Discipline of Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR
| | - K Y Li
- Centralized Research Laboratories, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong SAR
| | - H Shetty
- Department of Conservative Dentistry and Endodontics, Nair Hospital Dental College, Mumbai, India
| | - W Xi
- Department of Operative Dentistry and Endodontics, Guanghua College of Stomatology, Sun Yat-sen University, Guangzhou, China
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Denis CL, Richardson R, Park S, Zhang C, Xi W, Laue TM, Wang X. Defining the protein complexome of translation termination factor eRF1: Identification of four novel eRF1-containing complexes that range from 20S to 57S in size. Proteins 2018; 86:177-191. [PMID: 29139201 PMCID: PMC5897186 DOI: 10.1002/prot.25422] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 11/09/2017] [Accepted: 11/10/2017] [Indexed: 12/23/2022]
Abstract
The eukaryotic eRF1 translation termination factor plays an important role in recognizing stop codons and initiating the end to translation. However, which exact complexes contain eRF1 and at what abundance is not clear. We have used analytical ultracentrifugation with fluorescent detection system to identify the protein complexome of eRF1 in the yeast Saccharomyces cerevisiae. In addition to eRF1 presence in translating polysomes, we found that eRF1 associated with five other macromolecular complexes: 77S, 57S, 39S, 28S, and 20S in size. Generally equal abundances of each of these complexes were found. The 77S complex primarily contained the free 80S ribosome consistent with in vitro studies and did not appear to contain significant levels of the monosomal translating complex that co-migrates with the free 80S ribosome. The 57S and 39S complexes represented, respectively, free 60S and 40S ribosomal subunits bound to eRF1, associations not previously reported. The novel 28S and 20S complexes (containing minimal masses of 830 KDa and 500 KDa, respectively) lacked significant RNA components and appeared to be oligomeric, as eRF1 has a mass of 49 KDa. The majority of polysomal complexes containing eRF1 were both substantially deadenylated and lacking in closed-loop factors eIF4E and eIF4G. The thirteen percent of such translating polysomes that contained poly(A) tails had equivalent levels of eIF4E and eIF4G, suggesting these complexes were in a closed-loop structure. The identification of eRF1 in these unique and previously unrecognized complexes suggests a variety of new roles for eRF1 in the regulation of cellular processes.
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Affiliation(s)
- Clyde L. Denis
- Department of Molecular, Cellular, and Biomedical Sciences, 46 College Road, Rudman Hall, University of New Hampshire, Durham, NH 03824, 603-862-2427, FAX: 603-862-4013
| | - Roy Richardson
- Department of Molecular, Cellular, and Biomedical Sciences, 46 College Road, Rudman Hall, University of New Hampshire, Durham, NH 03824, 603-862-2427, FAX: 603-862-4013
| | - Shiwha Park
- Department of Molecular, Cellular, and Biomedical Sciences, 46 College Road, Rudman Hall, University of New Hampshire, Durham, NH 03824, 603-862-2427, FAX: 603-862-4013
| | - Chongxu Zhang
- Department of Molecular, Cellular, and Biomedical Sciences, 46 College Road, Rudman Hall, University of New Hampshire, Durham, NH 03824, 603-862-2427, FAX: 603-862-4013
| | - Wen Xi
- Department of Molecular, Cellular, and Biomedical Sciences, 46 College Road, Rudman Hall, University of New Hampshire, Durham, NH 03824, 603-862-2427, FAX: 603-862-4013
| | - Thomas M. Laue
- Department of Molecular, Cellular, and Biomedical Sciences, 46 College Road, Rudman Hall, University of New Hampshire, Durham, NH 03824, 603-862-2427, FAX: 603-862-4013
| | - Xin Wang
- Department of Molecular, Cellular, and Biomedical Sciences, 46 College Road, Rudman Hall, University of New Hampshire, Durham, NH 03824, 603-862-2427, FAX: 603-862-4013
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Xi W, Song X, Hu S, Chen Z. Phase field crystal simulation of stress induced localized solid-state amorphization in nanocrystalline materials. J Phys Condens Matter 2017; 29:475902. [PMID: 28960182 DOI: 10.1088/1361-648x/aa8fee] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this work, the phase field crystal (PFC) method is used to study the localized solid-state amorphization (SSA) and its dynamic transformation process in polycrystalline materials under the uniaxial tensile deformation with different factors. The impacts of these factors, including strain rates, temperatures and grain sizes, are analyzed. Kinetically, the ultra-high strain rate causes the lattice to be seriously distorted and the grain to gradually collapse, so the dislocation density rises remarkably. Therefore, localized SSA occurs. Thermodynamically, as high temperature increases the activation energy, the atoms are active and prefer to leave the original position, which induce atom rearrangement. Furthermore, small grain size increases the percentage of grain boundary and the interface free energy of the system. As a result, Helmholtz free energy increases. The dislocations and Helmholtz free energy act as the seed and driving force for the process of the localized SSA. Also, the critical diffusion-time step and the percentage of amorphous region areas are calculated. Through this work, the PFC method is proved to be an effective means to study localized SSA under uniaxial tensile deformation.
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Affiliation(s)
- Wen Xi
- State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
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Wang K, Xi W, Yang D, Zheng Y, Zhang Y, Chen Y, Yan C, Tian G, An S, Li X, An F, Du J, Hu K, Cao J, Ren L, Huang F, Gao Z. Rhinovirus is associated with severe adult community-acquired pneumonia in China. J Thorac Dis 2017; 9:4502-4511. [PMID: 29268520 DOI: 10.21037/jtd.2017.10.107] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [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: 11/06/2022]
Abstract
Background Human rhinovirus (HRV) is one of the most common viral etiologies detected in community-acquired pneumonia (CAP) adult cases. However, few is known about the characteristics of HRV-associated CAP. To describe the clinical features of HRV-associated CAP in immunocompetent adults admitted to multiple medical centers in mainland China over a 2-year period. Methods A total of 383 patients admitted to hospitals for CAP were enrolled from 46 medical centers in mainland China between January 2013 and December 2014. Multiplex real-time polymerase chain reaction (RT-PCR) assays for viral detection and DNA-based quantitative loop-mediated isothermal amplification (qLAMP) assays for bacterial detection were implemented to all lower respiratory tract specimens obtained from the patients. Twenty-eight cases (28/383, 7.3%) revealed HRV-positive PCR results. Patients with bronchoalveolar lavage (BAL) HRV-positive PCR results (n=20) were further enrolled and divided into two groups depending on the status of bacterial co-infection (viral group, n=12; viral-Bacterial group, n=8). Demographic, clinical and microbiological data were reviewed and compared in detail. Results Cases with HRV-infection were remarkably correlated with respiratory failure (14/20) and most of them (13/14) received mechanical ventilation. Fever (17/20), productive cough (15/20) and dyspnea (6/20) were common symptoms while flu-like symptoms were rarely observed in the cohort. Streptococcus pneumoniae (3/8), Klebsiella pneumoniae (3/8) and Mycoplasma pneumoniae (2/8) were most frequently identified bacterium in the viral-bacterial group. Compared with the viral group, higher incidence of septic shock (3/8 vs. 1/12, P=0.255), longer ICU length of stay (LOS) (10.0 vs. 6.5 days, P=0.686), longer hospital LOS (18.5 vs. 13.0 days, P=0.208) and higher 28-day mortality (2/8 vs. 2/12, P=1) were observed in the Viral-Bacterial group, although without statistically significant difference. Conclusions HRV is a common etiology in CAP among China adults, especially in severe CAP. Clinicians should be vigilant considering of the poor outcome. Highly qualified multiplex PCR techniques with invasive sampling are needed to increase the detection rate.
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Affiliation(s)
- Keqiang Wang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Wen Xi
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Donghong Yang
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Yali Zheng
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
| | - Yaqiong Zhang
- Department of Respiratory and Critical Care Medicine, Peking University International Hospital, Beijing 102206, China
| | - Yusheng Chen
- Department of Respiratory Medicine, Fujian Provincial Hospital, Fuzhou 350001, China
| | - Chunliang Yan
- Department of Respiratory Medicine, Beijing Aerospace General Hospital, Beijing 100076, China
| | - Guizhen Tian
- Department of Respiratory Medicine, 263 Hospital of the Chinese People's Liberation Army, Beijing 101149, China
| | - Shuchang An
- Department of Respiratory Medicine, The First Hospital of Tsinghua University, Beijing 100016, China
| | - Xiangxin Li
- Department of Respiratory Medicine, Beijing Changping Hospital, Beijing 102200, China
| | - Fucheng An
- Department of Respiratory Medicine, Beijing Mentougou District Hospital, Beijing 102300, China
| | - Juan Du
- Department of Respiratory Medicine, The Affiliated Hospital of Guiyang Medical College, Guiyang 550004, China
| | - Ke Hu
- Department of Respiratory Medicine, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Jie Cao
- Department of Respiratory Medicine, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Lili Ren
- National Institute for Viral Disease Control and Prevention, China CDC, Beijing 100052, China
| | - Fang Huang
- Beijing Center for Disease Prevention and Control, Beijing 100013, China
| | - Zhancheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
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Tang Y, Shi W, Sun X, Xi W. Endoscopic ultrasound in diagnosis of esophageal tuberculosis: 10-year experience at a tertiary care center. Dis Esophagus 2017; 30:1-6. [PMID: 28575247 DOI: 10.1093/dote/dox031] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [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: 09/23/2016] [Indexed: 12/11/2022]
Abstract
Definite diagnosis of esophageal tuberculosis (ET) requires isolation of tubercle bacilli, which is challenging in clinical practice. Difficulty in differentiating ET from other esophageal diseases may well result in a delay in diagnosis. The literature on utility of endoscopic ultrasound (EUS) in diagnosis of ET is insufficient. This study aims to evaluate the role of EUS morphology combined with EUS-guided tissue acquisition in the diagnosis of ET. Data of the 35 patients diagnosed with ET from January 2006 to October 2015 were retrospectively analyzed. After miniprobe and linear echoendoscopic visualization, either linear EUS-guided deep biopsy or EUS-guided fine needle aspiration was performed for tissue acquisition. Histocytopathological results showing caseous necrosis or acid fast bacilli (AFB) or epithelioid granuloma were considered diagnostic. Esophageal wall thickening or mass formation with disruption of the adventitia due to infiltration by adjacent mediastinal lymphadenopathy was typically observed under EUS. Tissue acquisition revealed epithelioid granuloma in 33 patients, caseous necrosis in 13, a positive AFB stain in 14, and nonspecific chronic inflammation in 2. Of the 35 patients, 33 (94.3%) with both characteristic EUS morphology and diagnostic histocytopathology were considered to have an EUS established diagnosis. The remaining two with only nonspecific chronic inflammation received empirical antitubercular chemotherapy based solely on EUS morphology. The two-year follow-up confirmed diagnosis of ET in all patients. While the final diagnosis of ET was based upon two-year follow-up of treatment response to antitubercular medication in addition to caseous necrosis/granuloma/positive-AFB stain revealed by EUS-guided tissue acquisition, an EUS-established diagnosis of ET and medical treatment with long-term follow-up is rational and practical compared with surgery or untreated follow-up.
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Affiliation(s)
- Y Tang
- Department of Gastroenterology, The Third People's Hospital of Chengdu, Chengdu, China
| | - W Shi
- Department of Gastroenterology, The Third People's Hospital of Chengdu, Chengdu, China
| | - X Sun
- Department of Gastroenterology, The Third People's Hospital of Chengdu, Chengdu, China
| | - W Xi
- Department of Gastroenterology, The Third People's Hospital of Chengdu, Chengdu, China
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Wang F, Li R, Shang Y, Wang C, Wang GQ, Zhou DX, Yang DH, Xi W, Wang KQ, Bao J, Kang Y, Gao ZC. A Pilot Study of Quantitative Loop-mediated Isothermal Amplification-guided Target Therapies for Hospital-acquired Pneumonia. Chin Med J (Engl) 2017; 129:181-6. [PMID: 26830989 PMCID: PMC4799545 DOI: 10.4103/0366-6999.173484] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Background: It is important to achieve the definitive pathogen identification in hospital-acquired pneumonia (HAP), but the traditional culture results always delay the target antibiotic therapy. We assessed the method called quantitative loop-mediated isothermal amplification (qLAMP) as a new implement for steering of the antibiotic decision-making in HAP. Methods: Totally, 76 respiratory tract aspiration samples were prospectively collected from 60 HAP patients. DNA was isolated from these samples. Specific DNA fragments for identifying 11 pneumonia-related bacteria were amplified by qLAMP assay. Culture results of these patients were compared with the qLAMP results. Clinical data and treatment strategies were analyzed to evaluate the effects of qLAMP results on clinical data. McNemar test and Fisher's exact test were used for statistical analysis. Results: The detection of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia, Stenotrophomonas maltophilia, Streptococcus pneumonia, and Acinetobacter baumannii by qLAMP was consistent with sputum culture (P > 0.05). The qLAMP results of 4 samples for Haemophilus influenzae, Legionella pneumophila, or Mycoplasma pneumonia (MP) were inconsistent with culture results; however, clinical data revealed that the qLAMP results were all reliable except 1 MP positive sample due to the lack of specific species identified in the final diagnosis. The improvement of clinical condition was more significant (P < 0.001) in patients with pathogen target-driven therapy based on qLAMP results than those with empirical therapy. Conclusion: qLAMP is a more promising method for detection of pathogens in an early, rapid, sensitive, and specific manner than culture.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Zhan-Cheng Gao
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
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Wang L, Chen W, Xi W, Feng J, Dang P, Ma Y, Yu Y. Utility of enzyme-linked immunosorbent assays to test core antigen in the diagnosis and antiviral therapy management of hepatitis C virus infections. J Med Virol 2017; 89:1235-1240. [PMID: 27958657 DOI: 10.1002/jmv.24754] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 07/30/2016] [Revised: 12/02/2016] [Accepted: 12/05/2016] [Indexed: 12/21/2022]
Abstract
In this study, we evaluate the performance of the enzyme-linked immunosorbent assays (ELISAs) for HCV Ag detection in the diagnosis and antiviral therapy management of HCV infections. For the diagnosis of an active HCV infection, the limit of detection of HCV Ag corresponding to HCV RNA level was approximately 7300 IU/mL; the sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of HCV-Ag were 88.96, 100, 100, and 91.33%, respectively. The Pearson's correlation coefficient between HCV Ag and HCV RNA was 0.891. All patients with negative HCV Ag at interferon-α2α/ribavirin therapy week 1 achieved a sustained viral response (SVR), and the PPV was 100%; whereas in patients with positive HCV Ag at therapy weeks 12, the NPV for achieving non-response (NR) was 100%. The results showed that ELISAs for HCV Ag detection could be cost effectively applied to diagnose and evaluate the response to antiviral therapy for HCV infections.
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Affiliation(s)
- Linchuan Wang
- Clinical Laboratory of the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Wei Chen
- Clinical Laboratory of the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Wen Xi
- Clinical Laboratory of the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Jin Feng
- Clinical Laboratory of the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Pei Dang
- Clinical Laboratory of the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Yanfen Ma
- Clinical Laboratory of the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
| | - Yan Yu
- Inspection Department of Hong-Hui Hospital, College of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi Province, China
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Xi W. A Case Report of Endobronchial Hamartoma. Chest 2016. [DOI: 10.1016/j.chest.2016.02.447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Wang X, Xi W, Toomey S, Chiang YC, Hasek J, Laue TM, Denis CL. Stoichiometry and Change of the mRNA Closed-Loop Factors as Translating Ribosomes Transit from Initiation to Elongation. PLoS One 2016; 11:e0150616. [PMID: 26953568 PMCID: PMC4783044 DOI: 10.1371/journal.pone.0150616] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 02/17/2016] [Indexed: 01/06/2023] Open
Abstract
Protein synthesis is a highly efficient process and is under exacting control. Yet, the actual abundance of translation factors present in translating complexes and how these abundances change during the transit of a ribosome across an mRNA remains unknown. Using analytical ultracentrifugation with fluorescent detection we have determined the stoichiometry of the closed-loop translation factors for translating ribosomes. A variety of pools of translating polysomes and monosomes were identified, each containing different abundances of the closed-loop factors eIF4E, eIF4G, and PAB1 and that of the translational repressor, SBP1. We establish that closed-loop factors eIF4E/eIF4G dissociated both as ribosomes transited polyadenylated mRNA from initiation to elongation and as translation changed from the polysomal to monosomal state prior to cessation of translation. eIF4G was found to particularly dissociate from polyadenylated mRNA as polysomes moved to the monosomal state, suggesting an active role for translational repressors in this process. Consistent with this suggestion, translating complexes generally did not simultaneously contain eIF4E/eIF4G and SBP1, implying mutual exclusivity in such complexes. For substantially deadenylated mRNA, however, a second type of closed-loop structure was identified that contained just eIF4E and eIF4G. More than one eIF4G molecule per polysome appeared to be present in these complexes, supporting the importance of eIF4G interactions with the mRNA independent of PAB1. These latter closed-loop structures, which were particularly stable in polysomes, may be playing specific roles in both normal and disease states for specific mRNA that are deadenylated and/or lacking PAB1. These analyses establish a dynamic snapshot of molecular abundance changes during ribosomal transit across an mRNA in what are likely to be critical targets of regulation.
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Affiliation(s)
- Xin Wang
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America
| | - Wen Xi
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America
| | - Shaun Toomey
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America
| | - Yueh-Chin Chiang
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America
| | - Jiri Hasek
- Laboratory of Cell Reproduction, Institute of Microbiology of ASCR, Prague, Videnska 1083, Czech Republic
| | - Thomas M. Laue
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America
| | - Clyde L. Denis
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, NH, 03824, United States of America
- * E-mail:
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Song L, Kang H, Liu D, Dai Z, He J, Wang B, Zhao Y, Wang X, Xi W. Dimedone Derivative {2-[(4-Hydroxy-phenylamino)- methylene]-5,5-dimethyl-cyclohexane-1,3-dione} Plays an Important Role in Breast Cancer Treatment. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i9.25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Purpose: To investigate the effect of 2-[(4-hydroxy-phenylamino)-methylene]-5,5-dimethyl-cyclohex (HPDH) on mammary carcinogenesis induced by 7,12-dimethylbenz(a)anthracene in female Sprague Dawley rats.Methods: Among three groups of rats (50 each) used in the study, the control group was fed standard diet alone, ibuprofen group received standard diet containing 1200 mg/kg ibuprofen while HPDH group was administered standard diet containing 1200 mg/kg HPDH. The treatment was for 10 days for all the groups. All the animals received 20 mg of DMBA intragastrically by gavage. Clinical parameters for the rats were recorded weekly. Micrometer caliper was used to measure the diameter of all the tumors at the end of the experiment and tumor volume calculated. Histological evaluation was performed using hematoxylin and eosin (H&E) staining. High performance liquid chromatography (HPLC) was used to determine the level of HPDH and ibuprofen in the serum of the animals.Results: The data revealed a significant decrease in the number of rats with mammary tumor, number of tumors/rat and tumor volume by 54, 72 and 75 %, respectively, in HPDH group compared to control group. The ibuprofen- treated rats also showed significant decrease in the number of rats with tumor, number of tumors/rat and tumor volume by 43, 55, and 59 %, respectively. Treatment of rats with HPDH increased the latency period of tumor induction significantly (p < 0.005). Median detection period (50 % of tumors) was 92, 83 and 56 days, respectively, in HPDH, ibuprofen and control groups, respectively, after DMBA induction.Conclusion: These results demonstrate that HPDH possesses strong chemopreventive activity against mammary carcinogenesis.Keywords: Carcinogenesis, Mammary tumor, Median detection period, Tumor, Latency period, Chemopreventive activity, Ibuprofen
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Affiliation(s)
- J Chen
- Department of Radiology, Jiangsu Cancer Hospital & Cancer Hospital of Nanjing Medical University (NMU), 42, Baiziting, Nanjing 210009, China
| | - J Zhang
- Department of Pathology, Jiangsu Cancer Hospital & Cancer Hospital of Nanjing Medical University (NMU), Nanjing 210009, China
| | - J D Dowell
- Division of Interventional Radiology, Department of Radiology, Wexner Medical Center, The Ohio State University, Columbus, Ohio 43210, USA
| | - W Xi
- Department of Radiology, Jiangsu Cancer Hospital & Cancer Hospital of Nanjing Medical University (NMU), 42, Baiziting, Nanjing 210009, China
| | - X Zhang
- Department of Radiology, Jiangsu Cancer Hospital & Cancer Hospital of Nanjing Medical University (NMU), 42, Baiziting, Nanjing 210009, China
| | - S Chen
- Department of Radiology, Jiangsu Cancer Hospital & Cancer Hospital of Nanjing Medical University (NMU), 42, Baiziting, Nanjing 210009, China.
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Zhang C, Wang X, Park S, Chiang YC, Xi W, Laue TM, Denis CL. Only a subset of the PAB1-mRNP proteome is present in mRNA translation complexes. Protein Sci 2014; 23:1036-49. [PMID: 24838188 DOI: 10.1002/pro.2490] [Citation(s) in RCA: 15] [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: 01/22/2014] [Revised: 04/29/2014] [Accepted: 05/14/2014] [Indexed: 01/02/2023]
Abstract
We have previously identified 55 nonribosomal proteins in PAB1-mRNP complexes in Saccharomyces cerevisiae using mass spectrometric analysis. Because one of the inherent limitations of mass spectrometry is that it does not inform as to the size or type of complexes in which the proteins are present, we consequently used analytical ultracentrifugation with fluorescent detection system (AU-FDS) to determine which proteins are present in the 77S monosomal translation complex that contains minimally the closed-loop structure components (eIF4E, eIF4G, and PAB1), mRNA, and the 40S and 60S ribosomes. We assayed by AU-FDS analysis 33 additional PAB1-mRNP factors but found that only five of these proteins were present in the 77S translation complex: eRF1, SLF1, SSD1, PUB1, and SBP1. eRF1 is involved in translation termination, SBP1 is a translational repressor, and SLF1, SSD1, and PUB1 are known mRNA binding proteins. Many of the known P body/stress granule proteins that associate with the PAB1-mRNP were not present in the 77S translation complex, implying that P body/stress granules result from significant protein additions after translational cessation. These data inform that AU-FDS can clarify protein complex identification that remains undetermined after typical immunoprecipitation and mass spectrometric analyses.
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Affiliation(s)
- Chongxu Zhang
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, New Hampshire, 03824
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Mu XL, Shang Y, Zheng SY, Zhou B, Yu B, Dong XS, Cao ZL, Jiang N, Sun KK, Chen YC, Xi W, Gao ZC. [A study on the differential diagnosis of ciliated epithelial cells from Lophomonas blattarum in bronchoalveolar lavage fluid]. Zhonghua Jie He He Hu Xi Za Zhi 2013; 36:646-650. [PMID: 24423816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVE To validate the authenticity of the cases diagnosed as pulmonary Lophomonas blattarum infection in literatures and Lophomonas blattarum as a kind of pathogen resulting in pulmonary infection. METHODS From June 2012 to May 2013, mobile cells with cilia at the anterior end of the cells were observed in BALF from 6 patients with pulmonary disease in our hospital. Morphological feature and ultrastructure of the cells were further investigated by optical microscope and electron microscope to determine the type of the cells referring to literature-published photos of Lophomonas blattarum. Literatures about Lophomonas blattarum infection were searched with keyword Lophomonas blattarum from Wanfang Data, China National Knowledge Infrastructure (CNKI) and PubMed. Diagnostic methods and figures provided by the literature were carefully reviewed, and the accuracy of diagnosis of pulmonary Lophomonas blattarum was identified. RESULTS Mobile cells found in BALF from the 6 patients in our hospital had the morphological features of bronchial ciliate epithelial cells. A nucleus far from the cilia was observed in the middle or at the bottom of the cytoplasm, and these cells did not display the characteristic cytological structures of Lophomonas blattarum: calyx, perinuclear tubules and axial filament. Diagnosis of pulmonary Lophomonas blattarum reported in literatures so far were all based on the morphological features of mobile cells with a cluster of flagellate at anterior end of the cell by optical microscopy. None of the authors did further exploration on the ultrastructure of such a kind of cells and compared with features of Lophomonas blattarum described in the literature. All the active cells reported in literatures had the identical morphological features to those found in our investigation. CONCLUSION In the past 20 years, all the diagnosed cases as pulmonary Lophomonas blattarum infection reported in our country were misdiagnosed. Currently, there is no evidence to show Lophomonas blattarum as a pathogen resulting in pulmonary infection.
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Affiliation(s)
- Xin-lin Mu
- Department of Respiratory and Critical Care Medicine, Peking University People's Hospital, Beijing 100044, China
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Zhang Y, Deng J, Zhang Y, Guo F, Li C, Zou Z, Xi W, Tang J, Sun Y, Yang P, Han Z, Li D, Jiang C. Functionalized single-walled carbon nanotubes cause reversible acute lung injury and induce fibrosis in mice. J Mol Med (Berl) 2012; 91:117-28. [DOI: 10.1007/s00109-012-0940-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Revised: 07/25/2012] [Accepted: 07/27/2012] [Indexed: 01/04/2023]
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Wang X, Zhang C, Chiang YC, Toomey S, Power MP, Granoff ME, Richardson R, Xi W, Lee DJ, Chase S, Laue TM, Denis CL. Use of the novel technique of analytical ultracentrifugation with fluorescence detection system identifies a 77S monosomal translation complex. Protein Sci 2012; 21:1253-68. [PMID: 22733647 DOI: 10.1002/pro.2110] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2012] [Revised: 06/15/2012] [Accepted: 06/15/2012] [Indexed: 11/08/2022]
Abstract
A fundamental problem in proteomics is the identification of protein complexes and their components. We have used analytical ultracentrifugation with a fluorescence detection system (AU-FDS) to precisely and rapidly identify translation complexes in the yeast Saccharomyces cerevisiae. Following a one-step affinity purification of either poly(A)-binding protein (PAB1) or the large ribosomal subunit protein RPL25A in conjunction with GFP-tagged yeast proteins/RNAs, we have detected a 77S translation complex that contains the 80S ribosome, mRNA, and components of the closed-loop structure, eIF4E, eIF4G, and PAB1. This 77S structure, not readily observed previously, is consistent with the monosomal translation complex. The 77S complex abundance decreased with translational defects and following the stress of glucose deprivation that causes translational stoppage. By quantitating the abundance of the 77S complex in response to different stress conditions that block translation initiation, we observed that the stress of glucose deprivation affected translation initiation primarily by operating through a pathway involving the mRNA cap binding protein eIF4E whereas amino acid deprivation, as previously known, acted through the 43S complex. High salt conditions (1M KCl) and robust heat shock acted at other steps. The presumed sites of translational blockage caused by these stresses coincided with the types of stress granules, if any, which are subsequently formed.
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Affiliation(s)
- Xin Wang
- Department of Molecular, Cellular, and Biomedical Sciences, University of New Hampshire, Durham, New Hampshire 03824, USA
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Feng C, Cong-Xin H, Hong J, Teng W, Yan-Hong T, Xi W. Changes of swelling-activated chloride channels in atrial myocardium of rabbits with heart failure. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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