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Liu C, Gui Z, An C, Sun F, Gao X, Ge S. STUB1 is acetylated by KAT5 and alleviates myocardial ischemia-reperfusion injury through LATS2-YAP-β-catenin axis. Commun Biol 2024; 7:396. [PMID: 38561411 PMCID: PMC10985082 DOI: 10.1038/s42003-024-06086-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 03/20/2024] [Indexed: 04/04/2024] Open
Abstract
Myocardial ischemia-reperfusion injury (MIRI) is involved in the pathogenesis of multiple cardiovascular diseases. This study elucidated the biological function of lysine acetyltransferase 5 (KAT5) in cardiomyocyte pyroptosis during MIRI. Oxygen-glucose deprivation/reoxygenation and left anterior descending coronary artery ligation were used to establish MIRI models. Here we show, KAT5 and STIP1 homology and U-box-containing protein 1 (STUB1) were downregulated, while large tumor suppressor kinase 2 (LATS2) was upregulated in MIRI models. KAT5/STUB1 overexpression or LATS2 silencing repressed cardiomyocyte pyroptosis. Mechanistically, KAT5 promoted STUB1 transcription via acetylation modulation, and subsequently caused ubiquitination and degradation of LATS2, which activated YAP/β-catenin pathway. Notably, the inhibitory effect of STUB1 overexpression on cardiomyocyte pyroptosis was abolished by LATS2 overexpression or KAT5 depletion. Our findings suggest that KAT5 overexpression inhibits NLRP3-mediated cardiomyocyte pyroptosis to relieve MIRI through modulation of STUB1/LATS2/YAP/β-catenin axis, providing a potential therapeutic target for MIRI.
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Affiliation(s)
- Can Liu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, P.R. China
| | - Zhongxuan Gui
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, P.R. China
| | - Cheng An
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, P.R. China
| | - Fei Sun
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, P.R. China
| | - Xiaotian Gao
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, P.R. China
| | - Shenglin Ge
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui Province, P.R. China.
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Wusiman D, Guo L, Li L, Zhang X, Zhao X, An Z, Huang Z, Zhang Y, Li Z, Ying J, Wei M, Li W, An C. Clinicopathological and prognostic significance of PD-L1 and TIM-3 expression in medullary thyroid carcinoma: a retrospective immunohistochemistry study. J Endocrinol Invest 2024; 47:91-100. [PMID: 37464189 PMCID: PMC10776706 DOI: 10.1007/s40618-023-02126-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/30/2023] [Indexed: 07/20/2023]
Abstract
PURPOSE Expression of the programmed death-ligand 1 (PD-L1) and T-cell immunoglobulin and mucin-domain containing-3 (TIM-3) in medullary thyroid carcinoma (MTC) has been controversial and rarely reported. METHODS Surgical specimens of 190 MTC patients who had initial curative-intent surgery were collected. Immunohistochemistry of PD-L1 and TIM-3 was performed using 22C3 pharmDx (Dako, Carpinteria, CA) and anti-TIM-3 (1:500, ab241332, Abcam). Stained slides were scored using a combined positive score (CPS) with a cutoff of ≥ 1. We established correlations between PD-L1 expression, TIM-3 expression, clinicopathological, and survival data. RESULTS 13 cases (13/190, 6.84%) were positive for PD-L1 expression, and 42 cases (42/154, 27.27%) for TIM-3 expression. PD-L1 expression was correlated to TIM-3 expression (P = 0.002), but was not related to overall survival (OS) or progression-free survival (PFS). TIM-3 expression was correlated to perineural invasion (P = 0.040). Multivariate Cox analysis showed that lymphovascular invasion (LVI) was independently associated with OS. And tumor size, LVI, and lymph node metastases were significantly associated with PFS. Furthermore, the multivariate logistic analysis showed multifocal status, LVI, pathological T stage and lymph node metastasis were independent risk factors for biochemical recurrence/persistent disease. CONCLUSIONS We demonstrated that PD-L1 and TIM-3 expression were not frequent in MTC and were not associated with survival prognosis. Our results should be considered when clinical trials of PD-L1 or TIM-3 blockades are implemented.
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Affiliation(s)
- D Wusiman
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - L Guo
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - L Li
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - X Zhang
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - X Zhao
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z An
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z Huang
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Y Zhang
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z Li
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - J Ying
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - M Wei
- Department of Head and Neck Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 518116, Shenzhen, China.
| | - W Li
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China.
| | - C An
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China.
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An C, Sun F, Liu C, Huang S, Xu T, Zhang C, Ge S. IQGAP1 promotes mitochondrial damage and activation of the mtDNA sensor cGAS-STING pathway to induce endothelial cell pyroptosis leading to atherosclerosis. Int Immunopharmacol 2023; 123:110795. [PMID: 37597406 DOI: 10.1016/j.intimp.2023.110795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 08/07/2023] [Accepted: 08/11/2023] [Indexed: 08/21/2023]
Abstract
Atherosclerosis (AS) is the most common cardiovascular disease and has limited therapeutic options. IQ motif-containing GTPase-activating protein 1 (IQGAP1) is an important scaffolding protein regulating mitochondrial function influencing endothelial cell activity. Evidence suggests that mitochondrial damage can lead to leakage of mtDNA into the cytoplasm to activate the DNA sensor cGAS-STING to mediate pyroptosis. However, whether IQGAP1 induces NLRP3-mediated endothelial cell pyroptosis by regulating mitochondrial function and activating the DNA sensor cGAS-STING, and its underlying mechanisms remain unclear. In vivo, ApoE-/- C57BL/J and Ldlr-/- C57BL/J mice were pre-injected with adeno-associated virus (AAV) by the tail vein to specifically silence IQGAP1 expression and were fed a high-fat diet (HFD) for 12 weeks. IQGAP1 knockdown reduced mtDNA release and decreased the expression of DNA receptors and pyroptosis-related molecules as determined by immunohistochemistry and immunofluorescence. In vitro, palmitic acid (0.3 mmol/L) was incubated with human umbilical vein endothelial cells (HUVECs) for 24 h. Overexpression of IQGAP1 in HUVECs, flow cytometry, and mitochondrial superoxide staining revealed increased levels of ROS. Moreover, the mitochondrial tracker with dsDNA co-localization showed the release of mtDNA into the cytoplasm increased, which activated the DNA receptor cGAS-STING. Protein blotting and TUNEL staining revealed that IQGAP1 promoted NLRP3-mediated pyroptosis. Furthermore, cGAS or STING small-molecule inhibitors RU.521 or C-176 reverse IQGAP1-promoted HUVECs from undergoing NLRP3-mediated pyroptosis. These results suggest that IQGAP1 promotes oxidative stress and mtDNA release, activates the DNA sensor cGAS-STING, and leads to NLRP3-mediated pyroptosis. The present study provides new insights into the mechanisms underlying AS and identifies new pharmacological targets for treatment.
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Affiliation(s)
- Cheng An
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Fei Sun
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Can Liu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Shaojun Huang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China
| | - Tao Xu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui 230032, China
| | - Chengxin Zhang
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China.
| | - Shenglin Ge
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui 230022, China.
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Xue FM, Liu C, Lei Z, An C. [A case of haploinsufficiency of A20 caused by new variation of TNFAIP3 gene]. Zhonghua Er Ke Za Zhi 2023; 61:740-742. [PMID: 37528019 DOI: 10.3760/cma.j.cn112140-20230202-00072] [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: 08/03/2023]
Affiliation(s)
- F M Xue
- Department of Gastroenterology, Children's Hospital Affiliated to Zhengzhou University,Zhenzhou 450018, China
| | - C Liu
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan 430060, China
| | - Z Lei
- Henan Key Laboratory of Children's Genetics and Metabolic Diseases, Children's Hospital Affiliated to Zhengzhou University,Zhenzhou 450018, China
| | - C An
- Department of Clinical Laboratory, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
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5
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Gu C, Pang B, Sun S, An C, Wu M, Wang N, Yuan Y, Liu G. Neutrophil extracellular traps contributing to atherosclerosis: From pathophysiology to clinical implications. Exp Biol Med (Maywood) 2023; 248:1302-1312. [PMID: 37452714 PMCID: PMC10625340 DOI: 10.1177/15353702231184217] [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] [Indexed: 07/18/2023] Open
Abstract
Neutrophil extracellular traps (NETs) are network-like structures of chromatin filaments decorated by histones, granules, and cytoplasmic-derived proteins expelled by activated neutrophils under multiple pathogenic conditions. NETs not only capture pathogens in innate immunity but also respond to sterile inflammatory stimuli in atherosclerosis, such as lipoproteins and inflammatory cytokines. Atherosclerosis is a lipid-driven chronic inflammatory disease characterized by the accumulation and transformation of inflammatory cells, and smooth muscle cells in the intimal space. NETs-derived extracellular components possess toxic and proinflammatory properties leading to cellular dysfunction and tissue damage, which may establish a link among lipid metabolism, inflammatory immunity, and atherosclerosis. In this review, we discuss recent advances regarding the role of NETs engaged in the pathogenesis of atherosclerosis, particularly focusing on the interaction with lipids and inflammasomes, crosstalk with smooth muscle cells and inflammatory cells, and the association with aging. We also evaluate the current knowledge on the potential of NETs as biomarkers and therapeutic targets for atherosclerosis and its related diseases in clinical practice.
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Affiliation(s)
- Chun Gu
- Department of Laboratory, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
| | - Bo Pang
- Department of Laboratory, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
| | - Shipeng Sun
- Department of Laboratory, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
| | - Cheng An
- Department of Laboratory, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
| | - Min Wu
- Department of Laboratory, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
| | - Na Wang
- Department of Laboratory, Southern District of Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 102618, China
| | - Yuliang Yuan
- Department of Laboratory, Southern District of Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 102618, China
| | - Guijian Liu
- Department of Laboratory, Guang’anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
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Sun F, An C, Liu C, Hu Y, Su Y, Guo Z, Che H, Ge S. FTO represses NLRP3-mediated pyroptosis and alleviates myocardial ischemia-reperfusion injury via inhibiting CBL-mediated ubiquitination and degradation of β-catenin. FASEB J 2023; 37:e22964. [PMID: 37199660 DOI: 10.1096/fj.202201793rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 04/16/2023] [Accepted: 04/26/2023] [Indexed: 05/19/2023]
Abstract
Cardiac ischemia/reperfusion (I/R) injury is a complicated pathological event, which has close association with pyroptosis. This study uncovered the regulatory mechanisms of fat mass and obesity-associated protein (FTO) in NLRP3-mediated pyroptosis during cardiac I/R injury. H9c2 cells were stimulated with oxygen-glucose deprivation/reoxygenation (OGD/R). Cell viability and pyroptosis were detected by CCK-8 and flow cytometry. Western blotting or RT-qPCR was performed to analyze target molecule expression. NLRP3 and Caspase-1 expression was observed by immunofluorescence staining. IL-18 and IL-1β production was detected by ELISA. The total m6A and m6A level of CBL was determined by dot blot assay and methylated RNA immunoprecipitation-qPCR, respectively. The interaction between IGF2BP3 and CBL mRNA was confirmed by RNA pull-down and RIP assays. The protein interaction between CBL and β-catenin and β-catenin ubiquitination were evaluated by Co-IP. Myocardial I/R model was established in rats. We determined infarct size by TTC staining and pathological changes by H&E staining. LDH, CK-MB, LVFS, and LVEF were also assessed. FTO and β-catenin were down-regulated, while CBL was up-regulated by OGD/R stimulation. FTO/β-catenin overexpression or CBL silencing restrained OGD/R-induced NLRP3 inflammasome-mediated pyroptosis. CBL repressed β-catenin expression via ubiquitination and degradation. FTO reduced the mRNA stability of CBL by inhibiting m6A modification. CBL-mediated ubiquitination and degradation of β-catenin were involved in FTO-induced pyroptosis inhibition during myocardial I/R injury. FTO inhibits NLRP3-mediated pyroptosis to attenuate myocardial I/R injury via repressing CBL-induced ubiquitination degradation of β-catenin.
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Affiliation(s)
- Fei Sun
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, P.R. China
| | - Cheng An
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, P.R. China
| | - Can Liu
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, P.R. China
| | - Ying Hu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of Pharmacy, Anhui Medical University, Hefei, P.R. China
| | - Yue Su
- School of Public Basic, Bengbu Medical College, Bengbu, P.R. China
| | - Zhixiang Guo
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, P.R. China
| | - Hong Che
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, P.R. China
| | - Shenglin Ge
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, P.R. China
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7
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Li S, Chen Y, Xue W, Wang Q, Huai Z, An C, Wang Y. Proteomics profiles reveal the potential roles of proteins involved in chicken macrophages stimulated by Lipopolysaccharide. Pol J Vet Sci 2023; 26:265-274. [PMID: 37389436 DOI: 10.24425/pjvs.2023.145032] [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: 07/01/2023]
Abstract
Lipopolysaccharide (LPS), a core part of gram-negative bacteria, is crucial for inducing an inflammatory response in living things. In the current study, we used LPS from Salmonella to stimulate chicken macrophages (HD11). Proteomics was used to investigate immune-related proteins and their roles further. Proteomics investigation revealed 31 differential expression proteins (DEPs) after 4 hours of LPS infection. 24 DEPs expressions were up-regulated, while seven were down-regulated. In this investigation, ten DEPs were mainly enriched in S. aureus infection, complement, and coagulation cascades, which were all implicated in the inflammatory response and clearance of foreign pathogens. Notably, complement C3 was shown to be up-regulated in all immune-related pathways, indicating that it is a potential protein in this study. This work contributes to a better understanding and clarification of the processes of Salmonella infection in chickens. It might bring up new possibilities for treating and breeding Salmonella-infected chickens.
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Affiliation(s)
- S Li
- School of Life Science, Bengbu Medical College, Donghai street No.2600, Bengbu, Anhui, China
| | - Y Chen
- School of Life Science, Bengbu Medical College, Donghai street No.2600, Bengbu, Anhui, China
| | - W Xue
- School of Life Science, Bengbu Medical College, Donghai street No.2600, Bengbu, Anhui, China
| | - Q Wang
- School of Life Science, Bengbu Medical College, Donghai street No.2600, Bengbu, Anhui, China
| | - Z Huai
- School of Life Science, Bengbu Medical College, Donghai street No.2600, Bengbu, Anhui, China
| | - C An
- School of Life Science, Bengbu Medical College, Donghai street No.2600, Bengbu, Anhui, China
| | - Y Wang
- School of Life Science, Bengbu Medical College, Donghai street No.2600, Bengbu, Anhui, China
- Anhui Province Key Laboratory of Translational Cancer Research, Donghai street No.2600, Bengbu Medical College, Bengbu, China
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8
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An C, Ma W, He RF, Wu T, Shi JN, Sun TT, Piao WH. Hepatitis C virus genotype diversity in Ningxia Hui autonomous region, Northwestern China. BRAZ J BIOL 2023; 83:e267641. [PMID: 37255197 DOI: 10.1590/1519-6984.267641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 03/21/2023] [Indexed: 06/01/2023] Open
Abstract
Hepatitis C virus (HCV) genotypes vary greatly in different regions. The aim of this study is to investigate the distribution of HCV genotypes in HCV infected patients, in Ningxia Hui Autonomous Region. Nucleic acid extraction and amplification were performed with test kits on 153 HCV infected patients serum samples. The HCV viral load was measured using reverse transcriptase PCR (RT-PCR) and HCV genotypes were determined. Among the 153 HCV-infected patients, 56 had genotype (GT)1b (36.60%), 45 had GT2a (29.40%), 23 had GT3a (15.00%), 14 had GT3b (9.20%),13 had GT6a (8.50%), 1 had GT1g (0.70%), 1 had GT6xa (0.70%). In GT1b, 21.40% were female and 78.60% were male; in GT2a, 42.20% were female and 57.80% were male;Males were most prevalent in genotypes 1b(39.30%), while female were most prevalent in genotype 2a(46.30%). Rare GT1g and GT6xa were also detected in males. The 41-50 year age group had the highest HCV prevalence of 32.00%. HCV GT1b is the predominant HCV genotype in Ningxia Hui Autonomous Region.
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Affiliation(s)
- C An
- People's Hospital of Ningxia Hui Autonomous Region, Department of Laboratory Medicine, Yinchuan, Ningxia, China
| | - W Ma
- People's Hospital of Ningxia Hui Autonomous Region, Department of Laboratory Medicine, Yinchuan, Ningxia, China
| | - R F He
- People's Hospital of Ningxia Hui Autonomous Region, Department of Laboratory Medicine, Yinchuan, Ningxia, China
| | - T Wu
- People's Hospital of Ningxia Hui Autonomous Region, Department of Laboratory Medicine, Yinchuan, Ningxia, China
| | - J N Shi
- Ningxia Medical Uniwersity, College of Clincal Medicine, Yinchuan, Ningxia, China
| | - T T Sun
- Ningxia Medical Uniwersity, College of Clincal Medicine, Yinchuan, Ningxia, China
| | - W H Piao
- People's Hospital of Ningxia Hui Autonomous Region, Department of Laboratory Medicine, Yinchuan, Ningxia, China
- Ningxia Medical Uniwersity, College of Clincal Medicine, Yinchuan, Ningxia, China
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9
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Edwards MK, An C, Rohrbaugh R, Peluso MJ, Lam SK. A web-based review of global health programs in U.S. allopathic and osteopathic medical schools. Med Teach 2022; 44:1408-1412. [PMID: 35868013 DOI: 10.1080/0142159x.2022.2099258] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
PURPOSE There is no current centralized database of structured global health programs at U.S. medical schools and no published review in the past decade. This study aims to describe the prevalence, characteristics, and requirements of non-degree, longitudinal, structured global health programs in U.S. allopathic and osteopathic medical schools. MATERIALS AND METHODS In July 2021, the authors performed a web-based review of existing structured global health programs for the 154 U.S. allopathic medical schools and 35 U.S. osteopathic medical schools established prior to 2019. RESULTS Of 189 institutions examined, 74 (39%) had online information about a structured global health program. Forty-three (53%) programs reported coursework requirements, 44 (54%) required a global health experience, and one program required demonstration of language or cultural knowledge. More internally administered programs required experiential work, while more externally administered programs required didactic work. There were few differences in program requirements between allopathic and osteopathic medical schools. CONCLUSIONS There has been a 75% increase over the past ten years in the number of U.S. allopathic medical schools with websites for structured global health programs. There appeared to be little standardization in their structure and requirements. The findings support the need for a web-based central repository for updated information regarding medical school global health curricula.
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Affiliation(s)
- M K Edwards
- Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - C An
- Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - R Rohrbaugh
- Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA
| | - M J Peluso
- Department of Medicine, University of California San Francisco School of Medicine, San Francisco, CA, USA
| | - S K Lam
- Case Western Reserve University School of Medicine, Cleveland, OH, USA
- Department of Pediatric Hospital Medicine, Cleveland Clinic Lerner College of Medicine, Cleveland, OH, USA
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Ge S, Zhu X, Xu Q, Wang J, An C, Hu Y, Yang F, Wang X, Yang Y, Chen S, Jin R, Li H, Peng X, Liu Y, Xu J, Zhu M, Shuai Z. Neutrophils in ANCA-associated vasculitis: Mechanisms and implications for management. Front Pharmacol 2022; 13:957660. [PMID: 36210838 PMCID: PMC9545605 DOI: 10.3389/fphar.2022.957660] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 09/05/2022] [Indexed: 11/22/2022] Open
Abstract
Antineutrophil cytoplasmic antibody (ANCA)-associated vasculitis (AAV) is a group of systemic autoimmune diseases, which is typified by inflammatory necrosis predominantly affecting the small vessels and often accompanied by positive ANCA. Clinically, AAV primarily includes microscopic polyangiitis (MPA), granulomatosis with polyangiitis (GPA), and eosinophilic granulomatosis with polyangiitis (EGPA). It has been found that in AAV pathogenesis, both innate and adaptive immunity are related to neutrophil function mutually. Many proteins, such as myeloperoxidase (MPO) and proteinase 3 (PR3), in neutrophil cytoplasm lead to the production of proteins such as MPO-ANCA and PR3-ANCA by activating adaptive immunity. In addition, through the process of neutrophil extracellular trap (NET) formation, activation of an alternative complement pathway and the respiratory burst can stimulate the neutrophils close to vascular endothelial cells and will participate the vessel inflammation. This review aims to reveal the potential mechanisms regulating the association between the neutrophils and various types of AAVs and to emphasize the results of recent findings on these interactions. Moreover, multiple underlying signaling pathways involved in the regulation of neutrophils during AAV processes have also been discussed. The ultimate goal of this review is to identify novel biomarkers and therapeutic targets for AAV management in the future.
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Affiliation(s)
- Shangqing Ge
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Xingyu Zhu
- National Institute of Clinical Drug Trials, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Qinyao Xu
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Junyan Wang
- Department of Clinical Medical, The Second Clinical Medical College, Anhui Medical University, Hefei, Anhui, China
| | - Cheng An
- Department of Cardiovascular Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Ying Hu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, Anhui, China
| | - Fan Yang
- Department of Clinical Medical, The First Clinical Medical College, Anhui Medical University, Hefei, Anhui, China
| | - Xinyi Wang
- Department of Clinical Medical, The First Clinical Medical College, Anhui Medical University, Hefei, Anhui, China
| | - Yipin Yang
- Department of Clinical Medical, The First Clinical Medical College, Anhui Medical University, Hefei, Anhui, China
| | - Shuwen Chen
- Department of Clinical Medical, The First Clinical Medical College, Anhui Medical University, Hefei, Anhui, China
| | - Ruimin Jin
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Haiyan Li
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Xinchen Peng
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yue Liu
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Junnan Xu
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Minhui Zhu
- National Institute of Clinical Drug Trials, The First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui, China
| | - Zongwen Shuai
- Department of Rheumatology and Immunology, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
- *Correspondence: Zongwen Shuai,
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11
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Shin S, Kwon HJ, Kim H, Min N, Lim Y, Joo T, Lee K, Jeong MS, Kim H, Um SW, An C, Lee S. 23P MRE-seq based cancer screening for lung and colorectal cancer by deep learning analysis of cfDNA methylation pattern cancer screening. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.050] [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: 11/01/2022] Open
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12
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Liu C, Hou X, Mo K, Li N, An C, Liu G, Pan Z. Serum non-coding RNAs for diagnosis and stage of liver fibrosis. J Clin Lab Anal 2022; 36:e24658. [PMID: 35989522 PMCID: PMC9550980 DOI: 10.1002/jcla.24658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/01/2022] [Accepted: 08/02/2022] [Indexed: 11/24/2022] Open
Abstract
Background All chronic liver diseases could lead to liver fibrosis. Accurate diagnosis and stage of fibrosis were important for the medical determination, management, and therapy. Liver biopsy was considered to be the gold criteria of fibrosis diagnosis. However, liver biopsy was an invasive method with some drawbacks. Non‐invasive tests for liver fibrosis included radiologic method and serum‐based test. Radiologic examination was influenced by obesity, cost, and availability. Serum‐based test was widely used in the screening and diagnostic of liver fibrosis. However, the accuracy was still needed to be improved. Methods Recent studies showed serum non‐coding RNAs: microRNA, long non‐coding RNA(lncRNA), and circular RNA(circRNA), which have the potentiality to be non‐invasive markers for liver fibrosis. The recent progress was summarized in this review. Results These studies showed serum non‐coding RNAs exerted a good diagnostic performance for liver fibrosis. A panel that included several non‐coding RNAs could increase the accuracy of single marker. Conclusions Serum microRNAs, lncRNAs, and circRNAs could be potential non‐invasive markers for diagnosis and stage of liver fibrosis. More high‐quality clinical study is needed for further research.
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Affiliation(s)
- Chao Liu
- Clinical Laboratory, Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijingChina
| | - Xueyun Hou
- Clinical Laboratory, Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijingChina
| | - Kaixin Mo
- Clinical Laboratory, Shandong Cancer Hospital and InstituteShandong First Medical University and Shandong Academy of Medical SciencesJinanShandongChina
| | - Nannan Li
- Clinical Laboratory, Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijingChina
| | - Cheng An
- Clinical Laboratory, Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijingChina
| | - Guijian Liu
- Clinical Laboratory, Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijingChina
| | - Zongdai Pan
- Clinical Laboratory, Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijingChina
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13
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Jin L, Zhang X, Li Z, Ni S, Yan D, Liu S, An C. 1749P A multivariate logistic regression model to predict lateral lymph node metastases of medullary thyroid cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.895] [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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14
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An C, Liu G, Cheng S, Pang B, Sun S, Zhang Y, Pan Z, Kang X. A pilot study of cdc6 as a biomarker for circulating tumor cells in patients with lung cancer. J Clin Lab Anal 2020; 34:e23245. [PMID: 32249466 PMCID: PMC7307357 DOI: 10.1002/jcla.23245] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 10/18/2019] [Revised: 01/20/2020] [Accepted: 01/21/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Cell division cycle 6 (cdc6) is a key factor of DNA replication initiation license system and a proto-oncogene. It has been detected in some tumor tissues to aid cancer diagnosis in many research projects. However, it remains unclear that if cdc6 could be detected in the peripheral blood, just like liquid biopsy, in solid tumor patients. The aim of this study is to investigate the possibility of cdc6 as a biomarker for circulating tumor cells in patients with lung cancer. METHODS We first detected the expression of cdc6 in peripheral blood mononuclear cells (PBMCs) and tumor cells by in situ hybridization with cdc6 RNA probe. Then, we examined the expression of cdc6 in PBMCs from health individual, mononuclear cells from cord blood, or A549 cell line by RT-qPCR. Furthermore, we used RT-qPCR to test the cdc6 expression in PBMCs from tumor patients (test group) and non-tumor individuals as a control group. Chi-square test with Fisher's exact test was used to analyze the statistical significance of the difference. P < .05 is considered as statistically significant difference. RESULTS When compared the cdc6 expression in cells from difference sources, we found that A549 tumor cell line had the strongest expression of cdc6, samples from cord blood showed the least expression level, indicating the detection strategy of RT-qPCR is reasonable. Using this method, we studied whether cdc6 in Peripheral blood could be detected as a biomarker by examining cdc6 expression from PBMCs of patients with lung cancer. We found 20% of patients with lung cancer were cdc6 positive in PBMCs, whereas only 4.26% was found positive in the control group (P = .039, P < .05). CONCLUSION Cell division cycle 6 has a potential to be used as a circulating tumor cell biomarker for lung cancer. Further study in clinical application is still broad needed.
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Affiliation(s)
- Cheng An
- Laboratory Diagnosis CenterBeijing Tiantan HospitalCapital Medical UniversityBeijingChina
- Department of Clinical LaboratoryGuang anmen HospitalChina Academy of Chinese medical ScienceBeijingChina
| | - Guijian Liu
- Department of Clinical LaboratoryGuang anmen HospitalChina Academy of Chinese medical ScienceBeijingChina
| | - Shi Cheng
- Department of Clinical LaboratoryGuang anmen HospitalChina Academy of Chinese medical ScienceBeijingChina
| | - Bo Pang
- Department of Clinical LaboratoryGuang anmen HospitalChina Academy of Chinese medical ScienceBeijingChina
| | - Shipeng Sun
- Department of Clinical LaboratoryGuang anmen HospitalChina Academy of Chinese medical ScienceBeijingChina
| | - Yaying Zhang
- Department of Clinical LaboratoryGuang anmen HospitalChina Academy of Chinese medical ScienceBeijingChina
| | - Zhongdai Pan
- Department of Clinical LaboratoryGuang anmen HospitalChina Academy of Chinese medical ScienceBeijingChina
| | - Xixiong Kang
- Laboratory Diagnosis CenterBeijing Tiantan HospitalCapital Medical UniversityBeijingChina
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15
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Yin Z, Zhang X, Sun Y, Miao S, An C. EP-1140 Retropharyngeal Lymph Node Metastasis in Hypopharyngeal Carcinoma: Analysis from Multi-center Data. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31560-9] [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]
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16
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Zhang Y, Yao Y, Wang MM, Yang YZ, Gu TT, Cao ZF, Lu L, An C, Wang JW, Chen GH, Xu Q, Zhao WM. Comparisons in geese of the courtship, mating behaviors and fertility of the Carlos and Sichuan breeds and the breed crosses. Anim Reprod Sci 2019; 204:86-94. [PMID: 30890291 DOI: 10.1016/j.anireprosci.2019.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 02/28/2019] [Accepted: 03/14/2019] [Indexed: 10/27/2022]
Abstract
The Chinese goose originated from the swan goose (Anser cygnoides) and the European goose originated from the greylag goose (Anser anser). The Chinese and European geese have the potential to crossbreed. Whether interspecific differences in mating behaviors affect successful hybridization is unknown. In this study, 10-month-old Carlos geese (n = 120; Anser anser) and Sichuan geese (Anser cygnoides) were selected, and 12 multi-male parent families (3♂+12♀) were established. The courtship and mating behaviors of pure and cross-bred combinations of the Carlos and Sichuan geese were recorded using video cameras. Initiative courtship by males was the main type of courtship. Fixed mating, mating interference, and uncooperative mating were common in the flocks. The frequencies of some courtship and mating behaviors were less in the cross-bred groups (Carlos ganders × Sichuan geese, Sichuan ganders × Carlos geese) compared with the Sichuan pure-bred groups (P < 0.05). The Carlos male geese had some unique mating behaviors (i.e., one-to-one mating, formation of distinct hierarchies, and competition interference). The fertility rate had a significant correlation with the frequency of successful mating (rp = 0.992, P < 0.05), rather than with the courtship behavior. These results indicate there were lesser frequencies of courtship and successful matings in the cross-breeding than purebreeding groups. Furthermore, the fertility rate depended largely on the successful mating behavior and was independent of the courtship behavior.
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Affiliation(s)
- Y Zhang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - Y Yao
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - M M Wang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - Y Z Yang
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - T T Gu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - Z F Cao
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - L Lu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - C An
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - J W Wang
- College of Animal Science and Technology, Sichuan Agricultural University, Yaan, Sichuan, 625014, China.
| | - G H Chen
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - Q Xu
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
| | - W M Zhao
- College of Animal Science and Technology, Yangzhou University, Yangzhou, Jiangsu Province, 225009, China.
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17
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Cho I, Kang H, Jo J, Lee H, Chung M, Park J, Park S, Song S, Park M, An C, Jung S, Bang S. FOLFIRINOX versus gemcitabine plus nab-paclitaxel for treatment of metastatic pancreatic cancer: a single-center cohort study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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18
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Chon YE, Jung KS, Kim MJ, Choi JY, An C, Park JY, Ahn SH, Kim BK, Kim SU, Park H, Hwang SK, Rim KS, Han KH, Kim DY. Predictors of failure to detect early hepatocellular carcinoma in patients with chronic hepatitis B who received regular surveillance. Aliment Pharmacol Ther 2018; 47:1201-1212. [PMID: 29492988 DOI: 10.1111/apt.14578] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 09/28/2017] [Accepted: 01/30/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND A proportion of chronic hepatitis B (CHB) patients are diagnosed with advanced hepatocellular carcinoma (HCC) despite regular surveillance. AIMS To determine predictors for HCC detection failure in CHB patients who underwent regular surveillance. METHODS CHB patients with well-preserved liver function, who underwent ultrasonography and alpha-foetoprotein (AFP) analysis every 6 months, were enrolled. Cox regression analysis was used to identify predictors for detection failure, defined as HCC initially diagnosed at Barcelona Clinic Liver Cancer (BCLC) stage B or C. RESULTS Of the 4590 CHB patients (mean age, 52.1 years; men, 61.6%), 169 patients were diagnosed with HCC (3.68%) and 35 (20.7%) HCC patients were initially diagnosed with HCC BCLC stage B or C. The cumulative incidence of HCC detection failure was 0.2% at year 1 and 1.3% at year 5. Multivariate analyses indicated that cirrhosis (hazard ratio [HR], 3.078; 95% CI, 1.389-6.821; P = 0.006), AFP levels ≥9 ng/mL (HR, 5.235; 95% CI, 2.307-11.957; P = 0.010), and diabetes mellitus (HR, 3.336; 95% CI, 1.341-8.296; P = 0.010) were independent predictors of HCC detection failure. Another model that incorporated liver stiffness (LS) values identified LS values ≥11.7 kPa (HR, 11.045; 95% CI, 2.066-59.037; P = 0.005) and AFP levels ≥9 ng/mL (HR, 4.802; 95% CI, 1.613-14.297; P = 0.005) as predictors of detection failure. CONCLUSIONS In CHB patients undergoing regular surveillance with ultrasonography and alpha-foetoprotein (AFP) analysis every 6 months, the HCC detection failure rate was not high (0.8% per person; 0.1% per test). However, careful attention should be paid in patients with advanced liver fibrosis (clinical cirrhosis or LS value >11.7 kPa), high AFP levels, or diabetes mellitus, who are prone to surveillance failure.
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Affiliation(s)
- Y E Chon
- Department of Internal Medicine, CHA Bundang Medical Center, Institute of Gastroenterology, CHA University, Seongnam, Korea.,CHA Bundang Liver Center, CHA Bundang Medical Center, Seongnam, Korea
| | - K S Jung
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - M-J Kim
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
| | - J-Y Choi
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
| | - C An
- Department of Radiology, Yonsei University College of Medicine, Seoul, Korea
| | - J Y Park
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Liver Center, Severance Hospital, Seoul, Korea
| | - S H Ahn
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Liver Center, Severance Hospital, Seoul, Korea
| | - B K Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Liver Center, Severance Hospital, Seoul, Korea
| | - S U Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Liver Center, Severance Hospital, Seoul, Korea
| | - H Park
- Department of Internal Medicine, CHA Bundang Medical Center, Institute of Gastroenterology, CHA University, Seongnam, Korea.,CHA Bundang Liver Center, CHA Bundang Medical Center, Seongnam, Korea
| | - S K Hwang
- Department of Internal Medicine, CHA Bundang Medical Center, Institute of Gastroenterology, CHA University, Seongnam, Korea.,CHA Bundang Liver Center, CHA Bundang Medical Center, Seongnam, Korea
| | - K S Rim
- Department of Internal Medicine, CHA Bundang Medical Center, Institute of Gastroenterology, CHA University, Seongnam, Korea.,CHA Bundang Liver Center, CHA Bundang Medical Center, Seongnam, Korea
| | - K-H Han
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Liver Center, Severance Hospital, Seoul, Korea
| | - D Y Kim
- Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea.,Yonsei Liver Center, Severance Hospital, Seoul, Korea
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19
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Zhou Q, Zuo MH, Li QW, Tian YT, Xie YB, Wang YB, Yang GY, Ye YJ, Guo P, Liu JP, Liu ZL, An C, Zhou T, Tian Z, Liu CB, Hu Y, Chi XY, Shen Y, Xia Y, Hu KW. [Efficacy of Weitan Waifu patch on the postsurgical gastroparesis syndrome of gastrointestinal cancer: a multi-center trial]. Zhonghua Zhong Liu Za Zhi 2018; 39:919-925. [PMID: 29262509 DOI: 10.3760/cma.j.issn.0253-3766.2017.12.008] [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: 11/05/2022]
Abstract
Objective: To investigate the safety and efficacy of the Weitan Waifu patch on the postsurgical gastroparesis syndrome (PGS) of gastrointestinal cancer. Methods: The multi-center, double-blind, randomized controlled trial was conducted with superiority design. Patients with PGS of gastrointestinal cancer diagnosed in 4 AAA hospitals and the abdominal symptom manifested as cold syndrome by Chinese local syndrome differentiation were recruited. These patients were randomly divided into two groups according to 1∶1 proportion. Placebo or Weitan Waifu patch was applied in control group or intervention group, respectively, based on the basic treatments, including nutrition support, gastrointestinal decompression, promoting gastric dynamics medicine.Two acupuncture points (Zhongwan and Shenque) were stuck with placebo in control group or patch in treatment group. The intervention course was 14 days or reached the effective standard. Results: From July 15, 2013 to Jun 3, 2015, 128 participants were recruited and 120 eligible cases were included in the full analysis set (FAS), and 60 cases in each group. 88 cases were included in the per-protocol set (PPS), including 45 cases in the treatment group and 43 cases in the control group. In the FAS, the clinical effective rate in the treatment group was 68.3%, significantly superior than 41.7% of the control group (P=0.003). The medium time of effective therapy in the treatment group was 8 days, significantly shorter than 10 days in the control group (P=0.017). In the FAS, 3 adverse events occurred in the treatment group, including mild to moderate decrustation, pruritus and nausea. The incidence rate of adverse events was 5.0% (3/60) and these symptoms were spontaneously remitted after drug withdrawal. No severe adverse events were observed in the control group. There was no significant difference between these two groups (P=0.244). Conclusion: Weitan Waifu patch is a safely and effectively therapeutic method for patients with PGS (cold syndrome) of gastroenterological cancer. Trial registration: International Standard Randomized Controlled Trial Number Register, ISRCTN18291857.
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Affiliation(s)
- Q Zhou
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - M H Zuo
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - Q W Li
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - Y T Tian
- Department of Pancreatic and Gastric Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y B Xie
- Department of Pancreatic and Gastric Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y B Wang
- Department of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing 100853, China
| | - G Y Yang
- Department of Hepatobiliary Surgery, Chinese PLA General Hospital, Beijing 100853, China
| | - Y J Ye
- Department of General Surgery, Peking University People's Hospital, Beijing 100044, China
| | - P Guo
- Department of General Surgery, Peking University People's Hospital, Beijing 100044, China
| | - J P Liu
- Evidence-Based Medicine Center, Beijing University of Chinese Medicine, Beijing 100029, Chinak
| | - Z L Liu
- Evidence-Based Medicine Center, Beijing University of Chinese Medicine, Beijing 100029, Chinak
| | - C An
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - T Zhou
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - Z Tian
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - C B Liu
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - Y Hu
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - X Y Chi
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - Y Shen
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - Y Xia
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - K W Hu
- Department of Oncology, Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
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20
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Wang Y, Jiang H, Cheng Y, An C, Chu Y, Raikhel AS, Zou Z. Activation of Aedes aegypti prophenoloxidase-3 and its role in the immune response against entomopathogenic fungi. Insect Mol Biol 2017; 26:552-563. [PMID: 28556276 PMCID: PMC5582978 DOI: 10.1111/imb.12318] [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] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Serine protease cascade-mediated melanization is an important innate immune response in insects and crustaceans, which involves the proteolytic activation of prophenoloxidase (PPO). In this study, we investigated the role of Aedes aegypti PPO3 in antifungal immune defence. We expressed and purified recombinant PPO3 (rPPO3) in Escherichia coli and demonstrated that rPPO3 was activated by ethanol and, to a lesser extent, by cetylpyridinium chloride. In the presence of Cu2+ , rPPO3 exhibited enzyme activity. Immunoblot results revealed that the rPPO3 was cleaved by the haemolymph from immune-challenged mosquitoes or purified Ostrinia furnacalis serine protease 105 in vitro. The cleaved rPPO3 converted dopamine to toxic intermediates that killed fungal conidia of Beauveria bassiana in vitro. In mosquitoes challenged with Be. bassiana, cleavage of rPPO3 produced a 50 kDa phenoloxidase (PO) fragment. Further analysis revealed that the survival rate of mosquitoes with fungal infection increased significantly following injection of rPPO3 into the haemocoel. Taken together, our results suggest that proteolytic cleavage of the mosquito PPO3 plays an important role in the antifungal immune response. This has led to a better understanding of the mechanism of PPO activation in the mosquito and the role of melanization in the antifungal immune response.
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Affiliation(s)
- Y. Wang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P. R. China
| | - H. Jiang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P. R. China
| | - Y. Cheng
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - C. An
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, P. R. China
| | - Y. Chu
- Department of Entomology, College of Plant Protection, China Agricultural University, Beijing, 100193, P. R. China
| | - A. S. Raikhel
- Department of Entomology and Institute for Integrative Genome Biology, University of California, Riverside, CA 92521, USA
| | - Z. Zou
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
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21
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Abstract
Histone modification including H3 lysine 79 methylation (H3K79me) plays a key role during gene transcription and DNA damage repair. DOT1L, the sole methyltransferase for three states of H3K79me, is implicated in leukemia, co-lorectal cancer, and dilated cardiomyopathy. However, understanding of DOT1L and H3K79me in these pathways and disease pathogenesis has been limited due to the difficulty of working with DOT1L protein. For instance, locus-specific or genome-wide binding sites of DOT1L revealed by chromatin immunoprecipitation (ChIP)-based methods are necessary for inferring its functions, but high-quality ChIP-grade antibodies are currently not available. Herein we have developed a knock-in approach to tag endogenous DOT1L with 3 × Flag at its C-terminal domain to follow functional analyses. The knock-in was facilitated by using TALENs to induce a targeted double-strand break at the endogenous DOTIL to stimulate local homologous recombination at that site. The single cell colonies with successful knock-in were isolated and verified by different methods. We also demonstrated that tagged DOT1L maintains its normal function in terms of methylation and that the engineered cells would be very useful for further studies.
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Affiliation(s)
- Cheng An
- Guang’an Men Hospital, China Academy of Chinese Medical Sciences, Beijing, China
- Laboratory of Human Environmental Epigenomes, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Guangjing Zhu
- Laboratory of Human Environmental Epigenomes, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Suzanne N. Martos
- Laboratory of Human Environmental Epigenomes, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Xue Feng
- Guang’an Men Hospital, China Academy of Chinese Medical Sciences, Beijing, China
| | - Haimou Zhang
- School of Life Sciences, Hubei University, Wuhan, China
| | | | - Zhibin Wang
- Laboratory of Human Environmental Epigenomes, Department of Environmental Health Sciences, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
- School of Life Sciences, Hubei University, Wuhan, China
- Fenxian Central Hospital, Shanghai, China
- Department of Oncology and Sidney Kimmel Comprehensive Cancer Center, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
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22
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An C, Yamamoto N. Fungal compositions and diversities on indoor surfaces with visible mold growths in residential buildings in the Seoul Capital Area of South Korea. Indoor Air 2016; 26:714-723. [PMID: 26509799 DOI: 10.1111/ina.12261] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 08/13/2015] [Accepted: 10/23/2015] [Indexed: 06/05/2023]
Abstract
Indoor visible mold growths are known to be associated with allergies and respiratory illnesses. However, a question remains of their compositions and diversities. Using swab sampling and high-throughput DNA sequencing, this study analyzed taxonomic compositions and diversities of fungi on indoor surfaces laden with visible mold growths in residential apartments in South Korea. The sequencing results showed low species diversities with Shannon indices ranging from 0.14 to 2.29 (mean = 1.11). Several allergy-related genera were detected on the same surface, where the most abundant Cladosporium with a mean relative abundance of 41% co-occurred with less abundant Aspergillus (0.094%), Rhodotorula (6.3%), Cryptococcus (3.7%), Alternaria (4.1%), and Crivellia (17%). β diversity analyses showed significant differences in the fungal communities between enclosed balconies and other indoor areas (P < 0.05, ANOSIM), emphasizing a need to sample at multiple indoor locations when assessments are made for indoor visible mold growths. High-throughput sequencing is powerful in characterizing compositions and diversities of fungal communities. Future studies should examine the relationships between taxonomic compositions and diversities of indoor visible molds and health outcomes of allergies and respiratory illnesses in residential buildings.
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Affiliation(s)
- C An
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, South Korea
| | - N Yamamoto
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, South Korea.
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23
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Lee S, An C, Xu S, Lee S, Yamamoto N. High-throughput sequencing reveals unprecedented diversities of Aspergillus species in outdoor air. Lett Appl Microbiol 2016; 63:165-71. [PMID: 27333577 DOI: 10.1111/lam.12608] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 04/04/2016] [Accepted: 06/20/2016] [Indexed: 11/30/2022]
Abstract
UNLABELLED This study used the Illumina MiSeq to analyse compositions and diversities of Aspergillus species in outdoor air. The seasonal air samplings were performed at two locations in Seoul, South Korea. The results showed the relative abundances of all Aspergillus species combined ranging from 0·20 to 18% and from 0·19 to 21% based on the number of the internal transcribed spacer 1 (ITS1) and β-tubulin (BenA) gene sequences respectively. Aspergillus fumigatus was the most dominant species with the mean relative abundances of 1·2 and 5·5% based on the number of the ITS1 and BenA sequences respectively. A total of 29 Aspergillus species were detected and identified down to the species rank, among which nine species were known opportunistic pathogens. Remarkably, eight of the nine pathogenic species were detected by either one of the two markers, suggesting the need of using multiple markers and/or primer pairs when the assessments are made based on the high-throughput sequencing. Due to diversity of species within the genus Aspergillus, the high-throughput sequencing was useful to characterize their compositions and diversities in outdoor air, which are thought to be difficult to be accurately characterized by conventional culture and/or Sanger sequencing-based techniques. SIGNIFICANCE AND IMPACT OF THE STUDY Aspergillus is a diverse genus of fungi with more than 300 species reported in literature. Aspergillus is important since some species are known allergens and opportunistic human pathogens. Traditionally, growth-dependent methods have been used to detect Aspergillus species in air. However, these methods are limited in the number of isolates that can be analysed for their identities, resulting in inaccurate characterizations of Aspergillus diversities. This study used the high-throughput sequencing to explore Aspergillus diversities in outdoor, which are thought to be difficult to be accurately characterized by traditional growth-dependent techniques.
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Affiliation(s)
- S Lee
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, South Korea
| | - C An
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, South Korea
| | - S Xu
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, South Korea
| | - S Lee
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, South Korea
| | - N Yamamoto
- Department of Environmental Health Sciences, Graduate School of Public Health, Seoul National University, Seoul, South Korea
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An C, Lee J, Yoo N, Lee S. Frameshift mutations of rapamycin pathway genes and their regional heterogeneity in sporadic colorectal cancers. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61023-7] [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: 10/21/2022]
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25
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Wang D, Wang X, Geng Y, An C. Detection of enterovirus 71 gene from clinical specimens by reverse-transcription loop-mediated isothermal amplification. Indian J Med Microbiol 2014; 32:124-9. [PMID: 24713896 DOI: 10.4103/0255-0857.129779] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE The objective of this study was to develop a sensitive, specific and rapid approach to diagnose hand foot and mouth disease (HFMD) for an early treatment by using loop-mediated isothermal amplification (LAMP) technique. MATERIALS AND METHODS A reverse-transcription loop-mediated isothermal amplification (RT-LAMP) for detecting EV71 virus was developed, the specificity and sensitivity of RT-LAMP was tested, and the clinical specimens was assayed by the RT-LAMP comparing with conventional reverse-transcription polymerase chain reaction (RT-PCR) and real-time PCR. RESULTS A total of 116 clinical specimens from the suspected HFMD individual were detected with the RT-LAMP. The detection rate for EV71 was 56.89% by RT-LAMP, 41.38% by real-time PCR and 34.48% by RT-PCR. The minimum detection limit of RT-LAMP was 0.01 PFU, both of RT-PCR and real-time PCR was 0.1PFU. Non-cross-reactive amplification with other enteroviruses was detected in the survey reports. CONCLUSIONS The effectiveness of RT-LAMP is higher than RT-PCR and real-time PCR. The protocol is easy to operate and time saving. It was not an expensive instrument, which was needed; it is an applicable method for rapid diagnosis of the disease, especially in resource-poor countries or in developing countries.
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Affiliation(s)
| | | | | | - C An
- Department of Medical Microbiology and Parasitology, College of Basic Medical Sciences, China Medical University, Shenyang 110001, China
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An C, Choi Y, Kim M, Lee J, Yoo N, Lee S. 143 Regional bias of intratumoral genetic heterogeneity of nucleotide repeats in colon cancers with microsatellite instability. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70269-2] [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: 10/24/2022]
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27
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Pang B, Cheng S, Sun SP, An C, Liu ZY, Feng X, Liu GJ. Prognostic role of PIK3CA mutations and their association with hormone receptor expression in breast cancer: a meta-analysis. Sci Rep 2014; 4:6255. [PMID: 25176561 PMCID: PMC4150110 DOI: 10.1038/srep06255] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 08/04/2014] [Indexed: 01/11/2023] Open
Abstract
The phosphatidylinositol-4, 5-bisphosphate 3-kinase, catalytic subunit alpha (PIK3CA) gene is frequently mutated in breast cancer (BCa). Sex hormone receptors (HRs), including estrogen receptor (ER) and progesterone receptor (PR) play pivotal roles in BCa. In this study, we evaluated the association between PIK3CA mutations and ER/PR expression and the prognostic role of PIK3CA mutations in BCa patients, and in particular, HR-positive BCa. Thirty-two studies involving 5719 cases of BCa obtained from database searches were examined. PIK3CA gene mutations correlated significantly with ER/PR expression (p < 0.00001) and relapse-free survival (RFS) (hazard ratio [HR] 0.76, 95% confidence interval [CI] 0.59-0.98, p = 0.03) but not overall survival (OS) (HR 1.14, 95%CI 0.72-1.82, p = 0.57) in unsorted BCa patients. PIK3CA mutations were not associated with OS (HR 1.06, 95%CI 0.67-1.67, p = 0.81) or RFS (HR 0.86, 95%CI 0.53-1.40, p = 0.55) in HR-positive BCa patients. In conclusion, PIK3CA mutations were significantly related to ER/PR expression and RFS in unsorted BCa patients. However, the clinical implications of PIK3CA mutations may vary according to different mutant exons. And PIK3CA mutations alone may have limited prognostic value for HR-positive BCa patients.
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Affiliation(s)
- Bo Pang
- Clinical laboratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beixian Ge 5#, XiCheng District, Beijing 100053, China
| | - Shi Cheng
- Clinical laboratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beixian Ge 5#, XiCheng District, Beijing 100053, China
| | - Shi-Peng Sun
- Clinical laboratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beixian Ge 5#, XiCheng District, Beijing 100053, China
| | - Cheng An
- Clinical laboratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beixian Ge 5#, XiCheng District, Beijing 100053, China
| | - Zhi-Yuan Liu
- Clinical laboratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beixian Ge 5#, XiCheng District, Beijing 100053, China
| | - Xue Feng
- Clinical laboratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beixian Ge 5#, XiCheng District, Beijing 100053, China
| | - Gui-Jian Liu
- Clinical laboratory, Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beixian Ge 5#, XiCheng District, Beijing 100053, China
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Affiliation(s)
- C. An
- Universidade Federal do Rio de Janeiro, Brazil; China University of Petroleum, China
| | | | - J. Su
- Universidade Federal do Rio de Janeiro, Brazil
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He C, Cong X, Zhang R, Wu D, An C, Zhao Z. Regulation of circadian locomotor rhythm by neuropeptide Y-like system in Drosophila melanogaster. Insect Mol Biol 2013; 22:376-388. [PMID: 23614491 DOI: 10.1111/imb.12027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Circadian rhythms in behaviour and physiology exist widely in animals, plants, fungi and cyanobacteria. Although much work has been carried out to characterize the endogenous clock circuit, the output signals coupling the circadian pacemaker to behaviour and physiology remain elusive. Here, we show that neuropeptide F (NPF), a homologue of mammalian neuropeptide Y, and its G protein-coupled receptor NPFR1 regulate the locomotor rhythm in Drosophila melanogaster. Flies with loss of function in NPF or NPFR1 were unable to ramp up their activity before lights off under light : dark (LD) cycles, and oscillations in npf/NPF and npfr1/NPFR1 were found to correlate temporally with the locomotor rhythm. Furthermore, NPF is expressed in clock neurones including dorsolateral neurones (LNd s) and ventrolateral neurones (LNv s), whereas NPFR1 is expressed in dorsal neurone 1 (DN1) and LNd s. These results show that NPF signalling is involved in the circadian locomotor rhythm in LD cycles.
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Affiliation(s)
- C He
- College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
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30
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Ahn S, Kim J, An C, Choi H, Lee SK, Koh Y, Kim SH, Choi E. Preoperative imaging evaluation of head and neck cancer: Comparison of 2D spin-echo and 3D THRIVE MRI techniques with resected tumours. Clin Radiol 2012; 67:e98-e104. [DOI: 10.1016/j.crad.2012.08.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Revised: 08/08/2012] [Accepted: 08/14/2012] [Indexed: 11/24/2022]
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31
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Clements IP, Hayes DL, Mullan BP, Yan J, Chen K, Xu J, Fan X, Sun X, An C, Barin E, Celikyurt U, Vural A, Sahin T, Kilic T, Agacdiken A, Bildirici U, Ural D, Surinder K, Razali O, Zunida A, Tay GS, Asyikin SN, Azlan H. Cardiac Resynchronization Therapy. Europace 2011. [DOI: 10.1093/europace/euq477] [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: 11/13/2022] Open
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32
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Sadat MA, Dirscherl S, Sastry L, Dantzer J, Pech N, Griffin S, Hawkins T, Zhao Y, Barese CN, Cross S, Orazi A, An C, Goebel WS, Yoder MC, Li X, Grez M, Cornetta K, Mooney SD, Dinauer MC. Retroviral vector integration in post-transplant hematopoiesis in mice conditioned with either submyeloablative or ablative irradiation. Gene Ther 2010; 16:1452-64. [PMID: 19657370 PMCID: PMC2795029 DOI: 10.1038/gt.2009.96] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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: 12/11/2022]
Abstract
X-linked chronic granulomatous disease (X-CGD) is an inherited immunodeficiency with absent phagocyte NADPH oxidase activity caused by defects in the gene encoding gp91phox. Here we evaluated strategies for less intensive conditioning for gene therapy of genetic blood disorders without selective advantage for gene correction, such as might be used in a human X-CGD protocol. We compared submyeloablative with ablative irradiation as conditioning in murine X-CGD, examining engraftment, oxidase activity and vector integration in mice transplanted with marrow transduced with a gamma-retroviral vector for gp91phox expression. The frequency of oxidase-positive neutrophils in the donor population was unexpectedly higher in many 300 cGy-conditioned mice compared to lethally irradiated recipients, as was the fraction of vector-marked donor secondary CFU-S12. Vector integration sites in marrow, spleen, and secondary CFU-S12 DNA from primary recipients were enriched for cancer-associated genes, including Evi1, and integrations in or near cancer-associated genes were more frequent in marrow and secondary CFU-S12 from 300 cGy-conditioned mice compared to fully ablated mice. These findings support the concept that vector integration can confer a selection bias, and suggest that intensity of the conditioning regimen may further influence the effects of vector integration on clonal selection in post-transplant engraftment and hematopoiesis.
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Affiliation(s)
- M A Sadat
- Department of Pediatrics, Herman B Wells Center for Pediatric Research, Riley Hospital for Children, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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Zhou YP, Hu YH, Wu HQ, An C, Wang J. [Association between the number of peripheral blood stem cells and cardiac function index in patients with ischemic heart failure]. Zhonghua Xin Xue Guan Bing Za Zhi 2009; 37:491-494. [PMID: 19927627] [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: 05/28/2023]
Abstract
OBJECTIVE To observe the association between the number of peripheral blood stem cells (PBSC) and cardiac function index (NYHA grade, left ventricular ejection fraction, LVEF, N-terminal-proB-type Natriuretic Peptide, NT-pro BNP) in patients with ischemic heart failure (IHF). METHODS A total of 199 patients hospitalized in our department between August 2007 and April 2008 due to IHF were included in this study. NYHA grade, LVEF (measured by echocardiography), plasma NT-proBNP and number of PBSC were analyzed. RESULTS PBSC number was significantly decreased in proportion with increasing NYHA grade and PBSC number was significantly lower in patients with NYHA IV than that with class II and III (all P<0.01). LVEF was positively correlated with PBSC number (r = 0.35, P = 0.001), NT-proBNP was negatively correlated with PBSC number (r = - 0.39, P = 0.009). Multiple regression analysis showed that LVEF and NT-proBNP were major determinants of PBSC (Beta = 0.14, - 0.25, 95% CI = -0.01 - 0.02, -0.18 - -0.04, P<0.05, P<0.01). CONCLUSION PBSC number was significantly correlated to cardiac function in IHF patients.
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Affiliation(s)
- Yu-ping Zhou
- Department of Cardiology, Guang' an' men Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China
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34
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Li J, Sun GZ, Lin HS, Pei YX, Qi X, An C, Yu J, Hua BJ. The herb medicine formula "Yang Wei Kang Liu" improves the survival of late stage gastric cancer patients and induces the apoptosis of human gastric cancer cell line through Fas/Fas ligand and Bax/Bcl-2 pathways. Int Immunopharmacol 2008; 8:1196-206. [PMID: 18602065 DOI: 10.1016/j.intimp.2008.04.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2008] [Revised: 04/08/2008] [Accepted: 04/14/2008] [Indexed: 02/01/2023]
Abstract
The herb medicine formula "Yang Wei Kang Liu" (YWKLF) has been used to inhibit the metastasis of human gastric cancer to prolong patient survival. In this study, we evaluated the effect of combination of chemotherapy with YWKLF on the survival of stage IV gastric cancer patients and the potential mechanisms of YWKLF by focusing on its capacity to activate apoptotic pathways in human gastric cancer cell line MGC-803. We found that combination of chemotherapy with oral administration of YWKLF significantly increased the survival of stage IV gastric cancer patients. In an approach of "serum pharmacology" in which sera were collected from rabbits orally administered with YWKLF and examined for their anti-tumor cell activity in vitro, we observed that sera from rabbits administered with YWKLF induced the apoptosis of MGC-803 cells by causing the loss of mitochondrial membrane potential, increasing the expression of Fas protein and Bax mRNA, as well as down-regulating Fas-L mRNA. Our results suggest that activation of major pro-apoptotic pathways may account for the anti-gastric cancer activity of YWKLF, which may provide a basis for isolation and identification of more highly effective anti-cancer components.
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Affiliation(s)
- Jie Li
- Department of Oncology, Guang An Men Hospital, China Academy of Chinese Medical Sciences, Beijing, 100053, People's Republic of China.
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35
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Lee S, Kyung S, An C, Jeong S, Kim Y, Kim M, Ha K, Choi D, Kang S, Chung Y. Nonspecific Bronchial Hyperresponsiveness Caused by T. canis 2nd Stage Larval Infestation. J Allergy Clin Immunol 2007. [DOI: 10.1016/j.jaci.2006.12.231] [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: 11/26/2022]
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36
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Wang L, An C, Qian W, Liu T, Li J, Chen Z. Detection of the putative cis-region involved in the induction by a Pyricularia oryzae elicitor of the promoter of a gene encoding phenylalanine ammonia-lyase in rice. Plant Cell Rep 2004; 22:513-518. [PMID: 14714141 DOI: 10.1007/s00299-003-0717-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2003] [Revised: 08/27/2003] [Accepted: 08/28/2003] [Indexed: 05/24/2023]
Abstract
A rice PAL (phenylalanine ammonia-lyase) gene sequence ( rPAL-P5), which is highly similar to and likely the same as a previously described rice ZB8PAL gene, including the 5'-upstream and exon I coding regions of PAL, was isolated using PCR amplification. The expression of several PALs, including rPAL-P5, was strongly induced following inoculation with Pyricularia oryzae or treatment with a P. oryzae elicitor. To identify the promoter region induced by the P. oryzae elicitor, we constructed and subsequently transformed rPAL-P5 promoter deletion series into rice calli using particle bombardment. Results from both elicitor-inducible reporter gene and gel mobility shift assays demonstrated that the sequence -349 to -256 of the rPAL-P5 promoter includes a cis-element involved in the induction of P. oryzae.
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Affiliation(s)
- L Wang
- National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, 100871 Beijing, PR China
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37
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Zhang C, Gong Y, Ma H, An C, Chen D, Chen ZL. Reactive oxygen species involved in trichosanthin-induced apoptosis of human choriocarcinoma cells. Biochem J 2001; 355:653-61. [PMID: 11311127 PMCID: PMC1221780 DOI: 10.1042/bj3550653] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The type-I ribosome-inactivating protein trichosanthin (TCS) has a broad spectrum of biological and pharmacological activities, including abortifacient, anti-tumour and anti-HIV activities. We have found for the first time that TCS stimulated the production of reactive oxygen species (ROS) in JAR cells (a human choriocarcinoma cell line) in a time- and concentration-dependent manner by using the fluorescent probe 2',7'-dichlorofluorescein diacetate with confocal laser scanning microscopy. ESR spectral studies and the inhibition of ROS formation by the superoxide radical anion (O(2)(-.)) scavenger superoxide dismutase, the H(2)O(2) scavenger catalase and the hydroxyl radical (OH(.)) scavenger mannitol suggested the involvement of O(2)(-.), H(2)O(2) and OH(.). TCS-induced ROS formation was shown to be dependent on the presence of both extracellular and intracellular Ca(2+); moreover, ROS production paralleled the intracellular Ca(2+) elevation induced by TCS, suggesting that ROS production might be a consequence of Ca(2+) signalling. TCS-induced activation of caspase-3 was initiated within 2 h; however, TCS-induced production of ROS was initiated within 5 min, suggesting that the production of ROS preceded the activation of caspase-3. Simultaneous observation of the nuclear morphological changes via two-photon laser scanning microscopy and ROS production via confocal laser scanning microscopy revealed that ROS is involved in the apoptosis of JAR cells. The involvement of ROS was also confirmed by the inhibition of TCS-induced cell death by the antioxidant Trolox and the ROS scavengers catalase and mannitol. Diethylenetriaminepenta-acetic acid, an inhibitor of metal-facilitated OH(.) formation, markedly inhibited TCS-induced cell death, suggesting that TCS induced OH(.) formation via the Fenton reaction. The finding that ROS is involved in the TCS-induced apoptosis of JAR cells might provide new insight into the anti-tumour and anti-HIV mechanism of TCS.
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Affiliation(s)
- C Zhang
- Molecular and Nano Sciences Laboratory, Department of Physics, Tsinghua University, Beijing 100084, China
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38
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Yu L, Li Y, Gu G, Wang Y, Zhou B, An C, Chen Z. A fast, sensitive and specific method for rice dwarf virus detection by northern blot hybridization. Acta Virol 1999; 43:361-5. [PMID: 10825925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Based on stability of double-stranded (ds) RNA, a new, fast, sensitive, and specific method for detection of genomic rice dwarf virus (RDV) dsRNA by molecular hybridization was developed. In contrary to the commonly used, standard Northern blot analysis, dsRNA is denatured in the immobilized state on the blot. Therefore, risk of degradation of single-stranded (ss) RNA by ribonuclease (RNase) during sample preparation, electrophoresis and blotting is eliminated. This method overcomes disadvantage of incomplete denaturation of dsRNA in Northern blot analysis. In conclusion, the newly developed method is reliable, sensitive, very specific, and gives a low background. The entire procedure is also less time consuming; it can be completed within 2-3 days. The new method may be regarded as a modification of the standard Northern blot analysis.
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Affiliation(s)
- L Yu
- College of Life Science, Peking University, Beijing, P.R. of China.
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Hu P, An C, Li Y, Chen Z. [Prokaryotic expressed trichosanthin and other two proteins have anti-fungal activity in vitro]. Wei Sheng Wu Xue Bao 1999; 39:234-40. [PMID: 12555540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
DNAs encoding Trichosanthin, tobacco class I Chitinase and tobacco class I beta-1, 3-Glucanase were expressed in E. coli, respectively. The expression products were assayed for their anti-fungal activity. All of three kinds of proteins show anti-fungal activity. When two of them combined, this activity was enhanced greatly. When three of them combined, the stronger anti-fungal activity was observed.
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Affiliation(s)
- P Hu
- National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing, 100871
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Xu H, Li Y, Mao Z, Li Y, Wu Z, Qu L, An C, Ming X, Schiemann J, Casper R, Chen Z. Rice dwarf phytoreovirus segment S11 encodes a nucleic acid binding protein. Virology 1998; 240:267-72. [PMID: 9454700 DOI: 10.1006/viro.1997.8945] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The function of rice dwarf virus segment 11 and the corresponding segments of other phytoreoviruses is not yet determined. The amino acid sequence of Pns11, encoded by segment 11, contains a putative zinc finger and five flanking basic regions at the C-terminus. The full-length Pns11 protein and three truncated derivatives, which lack the N-terminus, the zinc-finger or the C-terminal five basic regions were expressed in Escherichia coli and their nucleic acid binding properties were studied. Pns11 interacts with single- and double-stranded forms of DNA and RNA in a sequence-nonspecific manner. The truncated derivative which contains both the zinc-finger and the C-terminal basic regions has the same binding properties as the full-length Pns11. However, removal of either of these domains prevents binding activity. The binding activity of Pns11 was drastically reduced when the blots were treated with a high concentration of EDTA. Moreover, Pns11 extracted from infected rice also binds to single-stranded RNA. These data suggest that RDV Pns11 binding activity is structure-dependent and it may play an important role in virus replication and/or genome assortment.
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Affiliation(s)
- H Xu
- National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing, China
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Zhang F, Li Y, Liu Y, An C, Chen Z. Molecular cloning, sequencing, functional analysis and expression in E. coli of major core protein gene (S3) of rice dwarf virus Chinese isolate. Acta Virol 1997; 41:161-8. [PMID: 9385405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The complete nucleotide sequence of major core protein gene (segment S3) of rice dwarf virus (RDV) Chinese isolate was determined after cDNA cloning from the viral genomic RNA. Sequence analysis showed that the cloned fragment is 3195 bp in length and contains a single open reading frame (ORF), encoding the major core protein (P3) which M(r) of 114 K. The nucleotide and deduced amino acid sequences of S3 of this isolate share significant homology (94.1% and 97%, respectively) with those of S3 of the Japanese isolate. At the amino acid level, P3 of RDV Chinese isolate shares significant homology with P3 of rice gall dwarf virus (RGDV), significant regional homology with the rotavirus penetration, and homology with spheroidin of amsacta entomopoxvirus (SPH), which is the major protein of the occlusion body, with clp-like ATP-dependent protease binding subunit and with ATP-dependent protease ATP-binding subunit. Amino acid sequence analysis also showed that P3 contains RNA-dependent RNA polymerase (RDRP) motif-like elements such as DXXXD, SGXXXXXXN, GDD and ENXXXY. These results may suggest that P3 is a multifunctional protein which plays very important roles in the virus structure formation, virus replication and penetration processes. The full length cDNA sequence of RDV S3 and a partial one which covers nt 1004-3195 were cloned into bacterial expression vector pTrcHisB for expression. The full length cDNA sequence failed to be expressed in E. coli, but the partial sequence was successfully expressed there as confirmed by the Western blot analysis. Further analysis of RDV P3 is under way.
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Affiliation(s)
- F Zhang
- National Laboratory of Protein Engineering and Plant Genetic Engineering, College of Life Sciences, Peking University, Beijing, P.R. of China
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Zhao X, Jiang S, Lu D, Lu L, Mao C, An C, Fan Y. [A resonance Raman spectrometer with UV-visible continuously tunable excitation lines]. Guang Pu Xue Yu Guang Pu Fen Xi 1997; 17:65-69. [PMID: 15810418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A set of resonance Raman spectrometer with excitation lines continuously tunable in 220-970nm, which is a first set in China, has been assembled. The factors influenced on the signal noise ratio (SNR) of spectra were analyzed in detail. The methods to improve the SNR were suggested and the parameters of the spectrometer were optimized. A satisfied Raman spectra can be obtained.
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Affiliation(s)
- X Zhao
- National Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074
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Zhang R, An C, Chen M. [Comparative study of HCG receptors in rat ovary and testis]. Hua Xi Yi Ke Da Xue Xue Bao 1995; 26:257-60. [PMID: 8586387] [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: 01/31/2023]
Abstract
It has been documented that there are specific human chorionic gonadotropin (HCG) receptors in cell membrane of rat ovary and testicle. In order to make a further study on the characteristics of the HCG receptors on rat ovary and testicle, we focused on comparing those two kinds of receptors. Furthermore, we contrasted the testicular cell membrane with its homogenates. Rat ovarian and testicles were homogenized and soniced under ice cold conditions. The homogenates were centrifuged at 12,100 x g for 20 min following filtration. After sucrose density gradient ultracentrifugation (78,000 x g, 2.5h) for the pellets, the interface layers between 37% and 41% were collected. The pellets were subsequently suspended in cold 1mmol/L NaHCO3 solution and recentrifuged at 27,000 x g for 25 min. The results show that the cell membrane of both the rat ovary and testicle can bind to HCG specifically. A small amount of HCG has more evident inhibitory effect on the binding in testis than ovary. Scatchard plot analysis for the binding assay yielded a bound capacity of testicle cell membrane of 4.5 x 10(-5) mol/micrograms protein, Kd of 1.6 x 10(-7) mol/L, whereas it was 0.51 x 10(-9) mol/micrograms protein, a Kd of 1.69 x 10(-6) mol/L in ovarian cell membrane. In comparison with homogenates and cell membrane, the HCG binding activity of later is more sensitive.
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Affiliation(s)
- R Zhang
- Department of Biochemistry, Pharmaceutical College
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Zhao X, Lu D, Jiang S, Mao C, Fan Y, An C, Li Z. Interaction between intercalation type anticancer drugs and DNA studied by ultraviolet resonance Raman spectroscopy. Sci China B 1995; 38:555-63. [PMID: 7626197] [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: 01/26/2023]
Abstract
The interaction of typical intercalation type anticancer drugs, adriamycin (ADM) and aclacinomycin (ACM), with calf thymus DNA was studied first with ultraviolet resonance Raman spectroscopy (UVRRS). The results demonstrate that the important information such as intercalation sites of drugs, the electronic interaction and the hydrogen bonds between drugs and DNA can be obtained by UVRRS. The method can also show the influence of drugs on DNA conformation and hydrogen bonds between bases of DNA.
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Affiliation(s)
- X Zhao
- State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan, China
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An C, Okada Y, Hamaguchi A, Konishi T, Tomoyoshi T, Kataoka A. [Spontaneous renal rupture caused by renal pelvic tumor: a case report]. Hinyokika Kiyo 1995; 41:133-6. [PMID: 7702005] [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: 01/26/2023]
Abstract
A case of spontaneous rupture of the right kidney caused by a primary renal pelvic tumor is reported. A 57-year-old man complaining of right flank pain and gross hematuria was referred to our hospital in November 1992. In 1982, transurethral resection of the bladder tumor (TUR-Bt) and vesical instillation with mitomycin-C (MMC) had been performed at another hospital for recurrent bladder tumor. In 1988, the excretory urogram showed right hydronephrosis in the absence of a bladder tumor. In 1992, the excretory urogram revealed nonvisualization of the right kidney and obscurity of the right psoas muscle shadow. On the retrograde pyelogram, the upper calyx was irregular and the middle and lower calices were not clearly visualized. Selective renal arteriography demonstrated loss of continuity between the middle portion and lower poles. Right nephroureterectomy with bladder cuff was performed. The severely dilated pelvis contained a large amount of coagula and a papillary tumor. The thin renal parenchyme was lacerated at the lower pole. Histopathological findings revealed noninvasive transitional cell carcinoma. The present case represents the 6th spontaneous renal rupture caused by a renal pelvic tumor reported in Japan.
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Affiliation(s)
- C An
- Department of Urology, Shiga University of Medical Science
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Sheng H, Chen L, Zhang Z, Wu C, An C, Cheng C. The droplet group microexplosions in water-in-oil emulsion sprays and their effects on diesel engine combustion. ACTA ACUST UNITED AC 1994. [DOI: 10.1016/s0082-0784(06)80642-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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An C, Ichinose Y, Yamada T, Tanaka Y, Shiraishi T, Oku H. Organization of the genes encoding chalcone synthase in Pisum sativum. Plant Mol Biol 1993; 21:789-803. [PMID: 8467077 DOI: 10.1007/bf00027112] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
To analyze the regulation of defense-related genes by signal molecules produced by phytopathogens, we isolated genes that encode chalcone synthase (CHS) in Pisum sativum. We have obtained seven independent genomic clones that contain at least seven classes of CHS genes, identified by the hybridization analysis to CHS cDNA and by the restriction mapping analysis. Two of the genomic clones (clone 5 and 6) each contain two CHS genes in a tandem repeat. The nucleotide sequence analysis of CHS genomic clone 5 revealed that PsCHS1 and PsCHS2 were corresponding genes of the CHS cDNA clones, pCC6 and pCC2, respectively, as reported earlier. Both genes are interrupted by a single intron of 88 nucleotides with identical sequences, although exonic sequences and 5'-flanking sequences are divergent. Nucleotide sequences of the introns in five other classes of CHS genes showed that three classes had an intron of 87 nt with a striking homology to each other, but that the intron of the other two classes of CHS genes showed heterogeneity both in size and nucleotide sequence. 5'-upstream regions of PsCHS1 and PsCHS2 did not show sequence homology except the 31 bp identical sequence that contains the CCTACC motif resembling the box-1 sequence. Both PsCHS1 and PsCHS2 genes are shown to be induced by fungal elicitor by a primer extension analysis and a transient transformation analysis using pea protoplasts prepared from suspension cultured-cells.
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Affiliation(s)
- C An
- Laboratory of Plant Pathology & Genetic Engineering, College of Agriculture, Okayama University, Japan
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