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Wang Z, Yang M, Li S, Chi H, Wang J, Xiao C. [A transcriptomic analysis of correlation between mitochondrial function and energy metabolism remodeling in mice with myocardial fibrosis following myocardial infarction]. Nan Fang Yi Ke Da Xue Xue Bao 2024; 44:666-674. [PMID: 38708499 DOI: 10.12122/j.issn.1673-4254.2024.04.07] [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] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
OBJECTIVE To investigate the changes of mitochondrial respiratory function during myocardial fibrosis in mice with myocardial infarction (MI) and its correlation with the increase of glycolytic flux. METHODS Forty C57BL/6N mice were randomized into two equal groups to receive sham operation or ligation of the left anterior descending coronary artery to induce acute MI. At 28 days after the operation, 5 mice from each group were euthanized and left ventricular tissue samples were collected for transcriptomic sequencing. FPKM method was used to calculate gene expression levels to identify the differentially expressed genes (DEGs) in MI mice, which were analyzed using GO and KEGG databases to determine the pathways affecting the disease process. Heat maps were drawn to show the differential expressions of the pathways and the related genes in the enrichment analysis. In primary cultures of neonatal mouse cardiac fibroblasts (CFs), the changes in mitochondrial respiration and glycolysis levels in response to treatment with the pro-fibrotic agonist TGF-β1 were analyzed using Seahorse experiment. RESULTS The mouse models of MI showed significantly increased diastolic and systolic left ventricular diameter (P < 0.05) and decreased left ventricular ejection fraction (P < 0.0001). A total of 124 up-regulated and 106 down-regulated DEGs were identified in the myocardial tissues of MI mice, and GO and KEGG enrichment analysis showed that these DEGs were significantly enriched in fatty acid metabolism, organelles and other metabolic pathways and in the mitochondria. Heat maps revealed fatty acid beta oxidation, mitochondrial dysfunction and increased glycolysis levels in MI mice. In the primary culture of CFs, treatment with TGF-β1 significantly reduced the basal and maximum respiratory levels and increased the basal and maximum glycolysis levels (P < 0.0001). CONCLUSION During myocardial fibrosis, energy metabolism remodeling occurs in the CFs, manifested by lowered mitochondrial function and increased energy generation through glycolysis.
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Affiliation(s)
- Z Wang
- Chinese PLA Medical School, Beijing 100853, China
- Department of Cardiovascular Surgery, Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, China
| | - M Yang
- Department of Cardiovascular Surgery, Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, China
| | - S Li
- Department of Cardiovascular Surgery, First Medical Center of Chinese PLA General Hospital, Beijing 100853, China
| | - H Chi
- Department of Cardiovascular Surgery, Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, China
| | - J Wang
- Department of Cardiovascular Surgery, Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, China
| | - C Xiao
- Department of Cardiovascular Surgery, Sixth Medical Center of Chinese PLA General Hospital, Beijing 100037, China
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Wang J, Chen D, Dong F, Chi H. Diagnostic Sensitivity of Abdominal Fat Aspiration Biopsy for Cardiac Amyloidosis: A Systematic Review and Meta-Analysis. Int J Surg Pathol 2024; 32:286-293. [PMID: 37282575 DOI: 10.1177/10668969231177603] [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] [Indexed: 06/08/2023]
Abstract
Introduction. Cardiac amyloidosis is a lethal disease, the incidence of which is increasing every year. Early diagnosis and treatment are the keys to reducing the mortality of this disease. Methods. Relevant English literature published in Embase, PubMed, Cochrane Library, and Web of Science were searched until December 1, 2022. Meta-analysis was performed with Stata 17.0 software. Results. A total of 1060 patients with 5 articles were included in this study. The sensitivity of abdominal fat aspiration biopsy for the diagnosis of cardiac amyloidosis was 0.66 (0.48-0.84) and the sensitivity for light chain amyloidosis cardiomyopathy and transthyretin amyloidosis cardiomyopathy was 0.90 (0.80-0.97) and 0.39 (0.18-0.60), respectively. Conclusion. Abdominal fat aspiration biopsy has high sensitivity and clinical value in the diagnosis of light chain amyloidosis cardiomyopathy, whereas there are limitations in the diagnosis of transthyretin amyloidosis cardiomyopathy.
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Affiliation(s)
- Jiaqi Wang
- Department of Pathology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Dong Chen
- Department of Pathology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Fang Dong
- Department of Pathology, Beijing Anzhen Hospital, Capital Medical University, Beijing, China
| | - Haochen Chi
- Department of Neurology, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
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Shi J, Li X, Zhu M, Chi H, Song Y, Wang J, Huang J. The dUTPase of caprine arthritis-encephalitis virus negatively regulates interferon signaling pathway. Iran J Vet Res 2021; 22:209-216. [PMID: 34777521 DOI: 10.22099/ijvr.2021.38240.5568] [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] [Received: 08/24/2020] [Revised: 05/19/2021] [Accepted: 06/27/2021] [Indexed: 09/30/2022]
Abstract
Background Deoxyuracil triphosphate nucleotide (dUTP) pyrophosphatase (dUTPase, DU) is an enzyme of caprine arthritis-encephalitis virus (CAEV) that minimizes incorporation of dUTP into the DNA. Caprine arthritis-encephalitis virus relies partly on its ability to escape from innate immunity to cause persistent infections. Interferon β (IFN-β) is an important marker for evaluating the innate immune system, and it has a broad spectrum of antiviral activity. Aims This study was conducted to investigate the details of the IFN-β response to CAEV infection. Methods The expression of IFN-β and the proliferation of Sendai virus (SeV) and vesicular stomatitis virus (VSV) were determined by real-time quantitative polymerase chain reaction (qPCR). The effect of DU on the IFN signaling pathway was evaluated using luciferase reporter assays. Results In our study, the expression of IFN-β was significantly inhibited and the proliferation of SeV and VSV was promoted in cells overexpressing CAEV-DU. DU affected interferon stimulated response element (ISRE) and IFN-β promoter activities induced by RIG-I/MDA5/MAVS/TBK1 pathway, while did not affect them induced by interferon regulatory factor 3 (IRF3-5D). Conclusion DU protein downregulated the production of IFN-β by inhibiting the activity of the signal transduction molecules upstream of IRF3, thereby, helping CAEV escape innate immunity. Findings of this work provide an evidence to understand the persistent infection and multiple system inflammation of CAEV.
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Affiliation(s)
- J Shi
- MSc Student in Biology, Department of Microbiology & Immunology, School of Life Sciences, Tianjin University, Tianjin, 300072, China.,These authors contributed equally to this work
| | - X Li
- Departmet of Microbiology & Immunology, School of Life Sciences, Tianjin University, Tianjin, 300072, China.,These authors contributed equally to this work
| | - M Zhu
- MSc Student in Biology, Department of Microbiology & Immunology, School of Life Sciences, Tianjin University, Tianjin, 300072, China
| | - H Chi
- MSc Student in Biology, Department of Microbiology & Immunology, School of Life Sciences, Tianjin University, Tianjin, 300072, China
| | - Y Song
- MSc Student in Biology, Department of Microbiology & Immunology, School of Life Sciences, Tianjin University, Tianjin, 300072, China
| | - J Wang
- MSc Student in Biology, Department of Microbiology & Immunology, School of Life Sciences, Tianjin University, Tianjin, 300072, China
| | - J Huang
- Departmet of Microbiology & Immunology, School of Life Sciences, Tianjin University, Tianjin, 300072, China
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Higginson A, Wang Y, Chi H, Goffin A, Larkin I, Milchberg HM, Rocca JJ. Wake dynamics of air filaments generated by high-energy picosecond laser pulses at 1 kHz repetition rate. Opt Lett 2021; 46:5449-5452. [PMID: 34724498 DOI: 10.1364/ol.439232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/10/2021] [Indexed: 06/13/2023]
Abstract
We investigated the filamentation in air of 7 ps laser pulses of up to 200 mJ energy from a 1.03 μm-wavelength Yb:YAG laser at repetition rates up to f=1kHz. Interferograms of the wake generated show that while pulses in a train of repetition rate f=0.1kHz encounter a nearly unperturbed environment, at f=1kHz, a channel with an axial air density hole of ∼20% is generated and maintained at all times by the cumulative effect of preceding laser pulses. Measurements at f=1kHz show that the energy deposited decreases proportional to the air channel density depletion, becoming more pronounced as the repetition rate and pulse energy increase. Numerical simulations indicate that contrary to filaments generated by shorter duration pulses, the electron avalanche is the dominant energy loss mechanism during filamentation with 7 ps pulses. The results are of interest for the atmospheric propagation of joule-level picosecond pulses from Yb:YAG lasers, of which average powers now surpass 1 kW, and for channeling other directed energy beams.
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Wang Y, Liu D, Chi H, Yao D, Luo W, Li Y, Chen S, Wu G. P59.06 Mutational Landscape and Differential Expression Analysis of Transcription Factors in Non-Small Cell Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.957] [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: 11/28/2022]
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Zhou C, Zheng X, Huang X, Su J, Li M, Chen Z, Li M, Chi H. [ Huangqin decoction alleviates ulcerative colitis by regulating ILC3s-TH cell response]. Nan Fang Yi Ke Da Xue Xue Bao 2021; 41:256-263. [PMID: 33624600 DOI: 10.12122/j.issn.1673-4254.2021.02.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To explore the effect of Huangqin decoction (HQD) on group 3 innate lymphoid cells (ILC3s) and helper T cells (Th) for treatment of ulcerative colitis (UC). OBJECTIVE Male Balb/c mice were randomly divided into control group, DSS group, mesalazine group (ME, 400 mg/kg), and 2.275 g/kg, 4.55 g/kg and 9.1 g/kg HQD groups. All the mice were given free access to normal chow. Except for those in the normal control group, all the mice were given 3% DSS solution for 7 days to establish models of UC. The mice in ME group and 3 HQD groups were given mesalazine or HQD via oral gavage at the specified doses once a day. Flow cytometry was performed to analyze the ILC3s, MHC Ⅱ, Th1 and Treg in the lamina propria lymphocytes in the colon. Milliplex was performed to determine cytokine levels of in the colon tissues. OBJECTIVE Compared with those in DSS group, the mice in the 3 HQD groups all showed obviously lessened symptoms of UC with significantl decreased DAI score (P < 0.001) and macroscopic score (P < 0.001). The results of flow cytometry showed that HQD treatment significantly increased the percentage of ILC3s (P < 0.05) and expression of MHCⅡ (P < 0.05), obviously reduced the proportion of Th1 (P < 0.05) but increased Treg cells (P < 0.05) in the colon tissues. Milliplex showed that HQD treatment significantly reduced the expressions of Th-related pro-inflammatory cytokines including IL-2 (P < 0.05), IL-17A (P < 0.05), IL-23 (P < 0.05), TNF-α (P < 0.05), and IFN-γ (P < 0.05). OBJECTIVE HQD alleviates DSS- induced UC in mice by increasing ILC3s and MHC Ⅱ expression to suppress the function of Th17 and Th1 cells and promote Treg and Th2 cells.
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Affiliation(s)
- C Zhou
- First Clinical Medical College, Guangdong Medical University, Zhanjiang 524023, China
| | - X Zheng
- School Of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.,Dongguan Mathematical Engineering Academy of Chinese Medicine, Guangzhou University Chinese Medicine, Dongguan 523000, China
| | - X Huang
- School Of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.,Dongguan Mathematical Engineering Academy of Chinese Medicine, Guangzhou University Chinese Medicine, Dongguan 523000, China
| | - J Su
- Research Laboratory, Foshan Women and Children's Hospital, Affiliated Foshan Women and Children's Hospital of Southern Medical University, Foshan 528000, China
| | - M Li
- School Of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Z Chen
- Dongguan Mathematical Engineering Academy of Chinese Medicine, Guangzhou University Chinese Medicine, Dongguan 523000, China
| | - M Li
- School Of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - H Chi
- Second School of Clinical Medicine, Guangdong Medical University, Dongguan 523000, China
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Chi H. Letter to the Editor. Bull Entomol Res 2018; 108:843-844. [PMID: 30101739 DOI: 10.1017/s0007485318000263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- H Chi
- Niğde Ömer Halisdemir University,Faculty of Agricultural Sciences and Technologies,Department of Plant Production and Technologies,Niğde 51240,Turkey
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Chi H, Japhary A, de Man RA, de Knegt RJ, Janssen HLA, Hansen BE. Younger age and language barriers are associated with nonadherence to clinical follow-up in hepatitis B treatment. J Viral Hepat 2018; 25:1216-1219. [PMID: 29679439 DOI: 10.1111/jvh.12920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 03/08/2018] [Indexed: 01/05/2023]
Affiliation(s)
- H Chi
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - A Japhary
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - R A de Man
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - R J de Knegt
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - H L A Janssen
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands.,Toronto Centre for Liver Disease, Toronto General Hospital, University of Toronto, Toronto, ON, Canada
| | - B E Hansen
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands.,Toronto Centre for Liver Disease, Toronto General Hospital, University of Toronto, Toronto, ON, Canada
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Ulvestad JS, Kumari J, Seternes T, Chi H, Dalmo RA. Studies on the effects of LPS, ß-glucan and metabolic inhibitors on the respiratory burst and gene expression in Atlantic salmon macrophages. J Fish Dis 2018; 41:1117-1127. [PMID: 29600522 DOI: 10.1111/jfd.12806] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Revised: 02/20/2018] [Accepted: 02/20/2018] [Indexed: 06/08/2023]
Abstract
Reactive oxygen species (ROS) production in macrophage-like cells is induced as an antimicrobial defence against invading pathogens. In this study, we have explored how different stimuli and metabolic inhibitors affect the level of respiratory burst in Atlantic salmon (Salmo salar L.) head kidney macrophage-like cells. Cells stimulated in vitro by bacterial lipopolysaccharide (LPS) and ß-glucan showed increased production of ROS compared to unstimulated cells. Both stimulation and costimulation by curdlan (ß-glucan) induced a higher production of ROS compared to stimulation and costimulation by LPS. Metabolic inhibitors co-incubated with the stimulants did not, in most cases, perturb the level of ROS generation in the salmon macrophage-like cells. The NAD+ content as well as the NAD+ /NADH ratio increased in curdlan and LPS + curdlan-stimulated cells compared to control cells, which indicated increased metabolic activity in the stimulated cells. Supporting these findings, gene analysis using real-time quantitative PCR showed that arginase-1 and IL-1ß genes were highly expressed in the stimulated cells.
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Affiliation(s)
- J S Ulvestad
- Faculty of Biosciences, Fisheries and Economics, Norwegian College of Fishery Science, University of Tromsø - The Artic University of Norway, Tromsø, Norway
| | - J Kumari
- Faculty of Biosciences, Fisheries and Economics, Norwegian College of Fishery Science, University of Tromsø - The Artic University of Norway, Tromsø, Norway
| | - T Seternes
- Faculty of Biosciences, Fisheries and Economics, Norwegian College of Fishery Science, University of Tromsø - The Artic University of Norway, Tromsø, Norway
| | - H Chi
- Faculty of Biosciences, Fisheries and Economics, Norwegian College of Fishery Science, University of Tromsø - The Artic University of Norway, Tromsø, Norway
| | - R A Dalmo
- Faculty of Biosciences, Fisheries and Economics, Norwegian College of Fishery Science, University of Tromsø - The Artic University of Norway, Tromsø, Norway
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Shan LH, An XY, Xu MM, Fan SP, Zhong H, Ni P, Chi H. [Analysis on the trend of innovation and development in the field of ophthalmology]. Zhonghua Yan Ke Za Zhi 2018; 54:452-463. [PMID: 29895120 DOI: 10.3760/cma.j.issn.0412-4081.2018.06.012] [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 systematically analyze the innovation and development trend in the field of ophthalmology. Methods: The latest ophthalmology funding program from the National Eye Institute and National Natural Science Foundation of China, and funding project for 2012 to 2016 from the National Institutes of Health, National Natural Science Foundation of China and National key research and development plan of China was collected. Using the comparative analysis method, the major ophthalmology funding areas at home and abroad were analyzed. Papers published in 2012 to 2016 in the field of ophthalmology were collected from the Web of Science Core Collection, among which ESI highly cited papers and hot papers were particularly selected. Using bibliometric methods, the time trend of the number of papers and the citation frequency were analyzed. Using the co-occurrence cluster analysis method, the continued focuses and emerging concerns of ophthalmology papers was analyzed. Results: The funding plan of the National Eye Institute mainly covers nine major diseases in ophthalmology. NSFC focuses on retinal damage and repair mechanisms. The National Key Research and Development Program of China focuses on research on high-end ophthalmic implants. NIH continues to focus on the molecular mechanisms of blinding eye disease such as diabetic retinopathy, age-related macular degeneration, glaucoma, corneal disease and cataracts, basic research in genetics, and advanced diagnostic techniques such as imaging. Latest areas of interest involve gene editing techniques and the application of stem cell technology in ophthalmology. In China, research and application of stem cells in ophthalmic diseases, intraocular sustained-release drug carrier, and precision medicine research in ophthalmology are emerging areas of funding. In 2012 to 2016, research topics of 168 papers collected by ESI focused on macular degeneration, retinal diseases, glaucoma and other eye diseases. How to quickly promote new drugs and new technological achievements to the clinical application is a problem in the field of ophthalmology. How to change the ophthalmology clinic model, so as to provide patients with convenient and quality service, has become a research topic that needs to be given attention to. Conclusions: Based on the multidimensional analysis of innovation and development in the field of ophthalmology, cross application and integration of ophthalmology and high - tech fields such as advanced imaging technology, stem cell technology, gene editing technology, molecular targeting, and artificial intelligence will provide a strong basis for the enhancement of China's ophthalmology research innovation and international competitiveness. Research efforts for ophthalmic transformation should be strengthened, in order to realize the clinical application of the achievements as soon as possible. (Chin J Ophthalmol, 2018, 54: 452-463).
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Affiliation(s)
- L H Shan
- Institute of Medical Information, Chinese Academy of Medical Sciences, Beijing 100020, China
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Chen C, Chi H, Min L, Junhua Z. Downregulation of guanine nucleotide-binding protein beta 1 (GNB1) is associated with worsened prognosis of clearcell renal cell carcinoma and is related to VEGF signaling pathway. J BUON 2017; 22:1441-1446. [PMID: 29332336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
PURPOSE Clear-cell renal cell carcinoma (ccRCC) is characterized by genetic abnormalities, while the role of Guanine Nucleotide-Binding Protein Beta 1 (GNB1) in ccRCC has not been studied. We thus aimed to evaluate the expression and prognostic value of GNB1 in ccRCC. METHODS A two-stage study (exploration and validation) was conducted using in silico and immunohistochemical (IHC) scoring of ccRCC samples from our institute, to evaluate the association between GNB1 expression and clinicopathological parameters of ccRCC patients. Pathway analyses were performed for genes coexpressed with GNB1 using the KOBAS platform to profile the function of GNB1 and IHC validation. RESULTS In the exploration stage, data from TCGA ccRCC dataset were reproduced, which contained 537 patients with ccRCC and found that downregulation of GNB1 was significantly associated with worse prognosis. IHC staining from the Human Protein Atlas showed significantly downregulation of GNB1 in ccRCC tissue compared with normal kidney. Pathway analysis showed significantly altered vascular endothelial growth factor (VEGF) signaling pathways among which expressions of 3 genes (WASF2, NRP1, and HIP1) were significantly associated with GNB1 expression, respectively. In the validation stage, included were 80 ccRCC samples and GNB1 expression was scored using IHC positivity. GNB1 expression was negatively associated with tumor stage, lymph node invasion, metastasis, older age, and increased tumor grade. Female gender and receiving neoadjuvant therapy were also associated with decreased GNB1 expression. The expressions of WASF2, NRP1 and HIP1 were also studied and found that they were significantly associated with GNB1. CONCLUSION GNB1 was downregulated in ccRCC. Decreased GNB1 expression was associated with worsened disease characteristics and prognosis. GNB1 was related with VEGF signaling in ccRCC, implying a therapeutic potential of this factor.
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Affiliation(s)
- C Chen
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, 200072, China
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Park I, Lee K, Sun H, Kim J, Chi H, Kim S, Kim Y, Park J, Yoo C, Jo J. Effect of interval between ovulation trigger and oocyte aspiration in GnRH antagonist cycles. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.692] [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: 10/18/2022]
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Sun H, Lee K, Park I, Kim J, Chi H, Kim S, Kim Y, Park J, Jo J. Does luteal phase support improve pregnancy outcome in natural frozen-thawed embryo transfer cycles? Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.1044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Wu YL, Zhang B, Wang X, Orlando M, Chi H. A cross-trial comparison of pemetrexed-platinum followed by pemetrexed continuation maintenance versus gemcitabine-cisplatin without maintenance in chemotherapy-naive patients with advanced nonsquamous non-small-cell lung cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw383.82] [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: 11/14/2022] Open
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Sun H, Lee K, Park I, Kim S, Chi H, Kim J, Cho J. Is immunotherapy useful in recurrent implantation failure patients; especially with high natural killer cell? Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.937] [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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Park I, Sun H, Chi H, Kim S, park J, Kwak S, Lee K, Jo J. Frozen thawed Embryo transfer with simple monitoring does not impair IVF outcomes in natural cycles. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Sun H, PARK I, Kim S, Kwak S, Lee K, Chi H. Daily luteal phase support enhance pregnancy rates in COH/IUI cycles. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.700] [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: 10/23/2022]
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Chi H, Hansen BE, Yim C, Arends P, Abu-Amara M, van der Eijk AA, Feld JJ, de Knegt RJ, Wong DKH, Janssen HLA. Reduced risk of relapse after long-term nucleos(t)ide analogue consolidation therapy for chronic hepatitis B. Aliment Pharmacol Ther 2015; 41:867-76. [PMID: 25752878 DOI: 10.1111/apt.13150] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [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: 10/22/2014] [Revised: 11/17/2014] [Accepted: 02/12/2015] [Indexed: 02/06/2023]
Abstract
BACKGROUND Before stopping nucleos(t)ide analogue (NA) treatment in chronic hepatitis B (CHB), 6-12 months of consolidation therapy is recommended. AIM To investigate the effect of consolidation therapy on off-treatment outcomes in CHB patients. METHODS We included 94 patients who stopped NA after at least 1 year of therapy. Patients could be HBeAg-positive or HBeAg-negative at start-of-treatment, but were HBeAg-negative and had undetectable HBV DNA at time of discontinuation. Consolidation therapy was defined as treatment after the first undetectable HBV DNA (and HBeAg loss for HBeAg-positive patients) until NA cessation. RESULTS At 3 years, 74% of the start-of-treatment HBeAg-positive and 75% of the start-of-treatment HBeAg-negative patients developed HBV DNA >2000 IU/mL at a single time point, whereas a persistent virological relapse (≥2 tests of HBV DNA >2000 IU/mL 6 months apart within 1 year) developed in 49% of the start-of-treatment HBeAg-positive and 53% of the start-of-treatment HBeAg-negative patients. For both HBeAg-positive and HBeAg-negative patients, consolidation therapy of ≥3 years was associated with lower persistent virological relapse rates compared to <1 year (1-year relapse rate: 25% vs. 54%; P = 0.063 and 24% vs. 57%; P = 0.036, respectively). At 3 years, 9% of the HBeAg-positive and 14% of the HBeAg-negative patients became HBsAg-negative. Prolonged consolidation therapy increased the likelihood of HBsAg loss. Two cirrhotic patients developed hepatic decompensation but both recovered. CONCLUSIONS After nucleos(t)ide analogue discontinuation, relapse was common in patients with chronic hepatitis B. Prolongation of consolidation therapy beyond 3 years decreased the risk of persistent virological relapse and increased the likelihood of HBsAg loss.
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Affiliation(s)
- H Chi
- Department of Gastroenterology and Hepatology, Erasmus MC University Medical Center Rotterdam, Rotterdam, The Netherlands
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Abbas D, Ngoc N, Blum J, Nga N, Chi H, Winikoff B. Medical abortion with mifepristone and misoprostol at 13–22 weeks: how long between the mifepristone and the misoprostol? Contraception 2015. [DOI: 10.1016/j.contraception.2015.02.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Cruz AR, Pillay A, Ramirez LG, Chi H, Valencia C, Alexander N, Radolf J, Salazar JC. P3.273 Molecular Typing and Detection of Macrolide Resistance Mutations in T. Pallidum Strains from Cali, Colombia. Br J Vener Dis 2013. [DOI: 10.1136/sextrans-2013-051184.0729] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Chi H, Li Z, Zhang X, Zheng S, Jin X, Yao JP. Proposal for photonic quantization with differential encoding using a phase modulator and delay-line interferometers. Opt Lett 2011; 36:1629-1631. [PMID: 21540950 DOI: 10.1364/ol.36.001629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A photonic quantization approach to implementing analog-to-digital conversion (ADC) in the optical domain with differential encoding employing a phase modulator and delay-line interferometers (DLIs) is proposed and demonstrated. In the proposed ADC system, the phase-modulated signal is sent to an array of DLIs that have identical time delay difference, but different phase shifts, which are employed to achieve quantization with differential encoding. A proof-of-concept experiment is performed. The quantization of a 10 GHz sinusoidal signal with a bit length of 4 is experimentally demonstrated.
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Affiliation(s)
- H Chi
- Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
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Fourati Ben Mustapha S, Khrouf M, Kacem Ben Rejeb K, Elloumi Chaabene H, Merdassi G, Wahbi D, Ben Meftah M, Zhioua F, Zhioua A, Azzarello A, Host T, Mikkelsen AL, Theofanakis CP, Dinopoulou V, Mavrogianni D, Partsinevelos GA, Drakakis P, Stefanidis K, Bletsa A, Loutradis D, Rienzi L, Cobo A, Paffoni A, Scarduelli C, Capalbo A, Garrido N, Remohi J, Ragni G, Ubaldi FM, Herrer R, Quera M, GIL E, Serna J, Grondahl ML, Bogstad J, Agerholm IE, Lemmen JG, Bentin-Ley U, Lundstrom P, Kesmodel US, Raaschou-Jensen M, Ladelund S, Guzman L, Ortega C, Albuz FK, Gilchrist RB, Devroey P, Smitz J, De Vos M, Bielanska M, Leveille MC, Borghi E, Magli MC, Figueroa MJ, Mascaretti G, Ferraretti AP, Gianaroli L, Szlit E, Leocata Nieto F, Maggiotto G, Arenas G, Tarducci Bonfiglio N, Ahumada A, Asch R, Sciorio R, Dayoub N, Thong J, Pickering S, Ten J, Carracedo MA, Guerrero J, Rodriguez-Arnedo A, Llacer J, Bernabeu R, Tatone C, Heizenrieder T, Di Emidio G, Treffon P, Seidel T, Eichenlaub-Ritter U, Cortezzi SS, Cabral EC, Ferreira CR, Trevisan MG, Figueira RCS, Braga DPAF, Eberlin MN, Iaconelli Jr. A, Borges Jr. E, Zabala A, Pessino T, Blanco L, Rey Valzacchi G, Leocata F, Ahumada A, Vanden Meerschaut F, Heindryckx B, Qian C, Deforce D, Leybaert L, De Sutter P, De las Heras M, De Pablo JL, Navarro B, Agirregoikoa JA, Barrenetxea G, Cruz M, Perez-Cano I, Gadea B, Herrero J, Martinez M, Roldan M, Munoz M, Pellicer A, Meseguer M, Munoz M, Cruz M, Roldan M, Gadea B, Galindo N, Martinez M, Pellicer A, Meseguer M, Perez-Cano I, Scarselli F, Alviggi E, Colasante A, Minasi MG, Rubino P, Lobascio M, Ferrero S, Litwicka K, Varricchio MT, Giannini P, Piscitelli P, Franco G, Zavaglia D, Nagy ZP, Greco E, Urner F, Wirthner D, Murisier F, Mock P, Germond M, Amorocho Llanos B, Calderon G, Lopez D, Fernandez L, Nicolas M, Landeras J, Finn-Sell SL, Leandri R, Fleming TP, Macklon NS, Cheong YC, Eckert JJ, Lee JH, Jung YJ, Hwang HK, Kang A, An SJ, Jung JY, Kwon HC, Lee SJ, Palini S, Zolla L, De Stefani S, Scala V, D'Alessandro A, Polli V, Rocchi P, Tiezzi A, Pelosi E, Dusi L, Bulletti C, Fadini R, Lain M, Mignini Renzini M, Brambillasca F, Coticchio G, Merola M, Guglielmo MC, Dal Canto M, Figueira R, Setti AS, Braga DPAF, Iaconelli Jr. A, Borges Jr. E, Worrilow KC, Uzochukwu CD, Eid S, Le Gac S, Esteves TC, van Rossem F, van den Berg A, Boiani M, Kasapi E, Panagiotidis Y, Goudakou M, Papatheodorou A, Pasadaki T, Prapas N, Prapas Y, Panagiotidis Y, Kasapi E, Goudakou M, Papatheodorou A, Pasadaki T, Vanderzwalmen P, Prapas N, Prapas Y, Norasing S, Atchajaroensatit P, Tawiwong W, Thepmanee O, Saenlao S, Aojanepong J, Hunsajarupan P, Sajjachareonpong K, Punyatanasakchai P, Maneepalviratn S, Jetsawangsri U, Herrero J, Cruz M, Tejera A, Rubio I, Romero JL, Meseguer M, Nordhoff V, Schlatt S, Schuring AN, Kiesel L, Kliesch S, Azambuja R, Okada L, Lazzari V, Dorfman L, Michelon J, Badalotti M, Badalotti F, Petracco A, Schwarzer C, Esteves TC, Nordhoff V, Schlatt S, Boiani M, Versieren K, Heindryckx B, De Croo I, Lierman S, De Vos W, Van den Abbeel E, Gerris J, De Sutter P, Milacic I, Borogovac D, Veljkovic M, Arsic B, Jovic Bojovic D, Lekic D, Pavlovic D, Garalejic E, Guglielmo MC, Coticchio G, Albertini DF, Dal Canto M, Brambillasca F, Mignini Renzini M, De Ponti E, Fadini R, Sanges F, Talevi R, Capalbo A, Papini L, Mollo V, Ubaldi FM, Rienzi LF, Gualtieri R, Albuz FK, Guzman L, Orteg C, Gilchrist RB, Devroey P, De Vos M, Smitz J, Choi J, Lee H, Ku S, Kim S, Choi Y, Kim J, Moon S, Demilly E, Assou S, Moussaddykine S, Dechaud H, Hamamah S, Takisawa T, Doshida M, Hattori H, Nakamura Y, Kyoya T, Shibuya Y, Nakajo Y, Tasaka A, Toya M, Kyono K, Novo S, Penon O, Gomez R, Barrios L, Duch M, Santalo J, Esteve J, Nogues C, Plaza JA, Perez-Garcia L, Ibanez E, Chavez S, Loewke K, Behr B, Reijo Pera R, Huang S, Wang H, Soong Y, Chang C, Okimura T, Kuwayama M, Mori C, Morita M, Uchiyama K, Aono F, Kato K, Takehara Y, Kato O, Minasi M, Casciani V, Scarselli F, Rubino P, Colasante A, Arizzi L, Litwicka K, Ferrero S, Mencacci C, Piscitelli C, Giannini P, Cucinelli F, Tocci A, Nagy ZP, Greco E, Wydooghe E, Vandaele L, Dewulf J, Van den Abbeel E, De Sutter P, Van Soom A, Moon JH, Son WY, Mahfoudh A, Henderson S, Jin SG, Shalom-Paz E, Dahan M, Holzer H, Mahmoud K, Triki-Hmam C, Terras K, Zhioua F, Hfaiedh T, Ben Aribia MH, Otsubo H, Egashira A, Tanaka K, Matsuguma T, Murakami M, Murakami K, Otsuka M, Yoshioka N, Araki Y, Kuramoto T, Smit JG, Sterrenburg MD, Eijkemans MJC, Al-Inany HG, Youssef MAFM, Broekmans FJM, Willoughby K, DiPaolo L, Deys L, Lagunov A, Amin S, Faghih M, Hughes E, Karnis M, Ashkar F, King WA, Neal MS, Antonova I, Veleva L, Petkova L, Shterev A, Nogales C, Martinez E, Ariza M, Cernuda D, Gaytan M, Linan A, Guillen A, Bronet F, Cottin V, Fabian D, Allemann F, Koller A, Spira JC, Agudo D, Martinez-Burgos M, Arnanz A, Basile N, Rodriguez A, Bronet F, Cho YS, Filioli Uranio M, Ambruosi B, Paternoster MS, Totaro P, Sardanelli AM, Dell'Aquila ME, Zollner U, Hofmann T, Zollner KP, Kovacic B, Roglic P, Vlaisavljevic V, Sole M, Santalo J, Boada M, Coroleu B, Veiga A, Martiny G, Molinari M, Revelli A, Chimote NM, Chimote M, Mehta B, Chimote NN, Sheikh N, Nath N, Mukherjee A, Rakic K, Reljic M, Kovacic B, Vlaisavljevic V, Ingerslev HJ, Kirkegaard K, Hindkjaer J, Grondahl ML, Kesmodel US, Agerholm I, Kitasaka H, Fukunaga N, Nagai R, Yoshimura T, Tamura F, Kitamura K, Hasegawa N, Nakayama K, Katou M, Itoi F, Asano E, Deguchi N, Ooyama K, Hashiba Y, Asada Y, Michaeli M, Rotfarb N, Karchovsky E, Ruzov O, Atamny R, Slush K, Fainaru O, Ellenbogen A, Chekuri S, Chaisrisawatsuk T, Chen P, Pangestu M, Jansen S, Catt S, Molinari E, Racca C, Revelli A, Ryu C, Kang S, Lee J, Chung D, Roh S, Chi H, Yokota Y, Yokota M, Yokota H, Sato S, Nakagawa M, Komatsubara M, Makita M, Araki Y, Yoshimura T, Asada Y, Fukunaga N, Nagai R, Kitasaka H, Itoi F, Tamura F, Kitamura K, Hasegawa N, Katou M, Nakayama K, Asano E, Deguchi N, Oyama K, Hashiba Y, Naruse K, Kilani S, Chapman MG, Kwik M, Chapman M, Guven S, Odaci E, Yildirim O, Kart C, Unsal MA, Yulug E, Isachenko E, Maettner R, Strehler E, Isachenko V, Hancke K, Kreienberg R, Sterzik K, Coticchio G, Guglielmo MC, Dal Canto M, Albertini DF, Brambillasca F, Mignini Renzini M, Fadini R, Zheng XY, Wang LN, Liu P, Qiao J, Inoue F, Dashtizad M, Wahid H, Rosnina Y, Daliri M, Hajarian H, Akbarpour M, Abbas Mazni O, Knez K, Tomaevic T, Vrtacnik Bokal E, Zorn B, Virant Klun I, Koster M, Liebenthron J, Nicolov A, van der Ven K, van der Ven H, Montag M, Fayazi M, Salehnia M, Beigi Boroujeni M, Khansarinejad B, Deignan K, Emerson G, Mocanu E, Wang JJ, Andonov M, Linara E, Ahuja KK, Nachef S, Figueira RCS, Braga DPAF, Setti AS, Iaconelli Jr. A, Pasqualotto FF, Borges Jr. E, Pasqualotto E, Borges Jr. E, Pasqualotto FF, Chang CC, Bernal DP, Elliott TA, Shapiro DB, Toledo AA, Nagy ZP, Economou K, Davies S, Argyrou M, Doriza S, Sisi P, Moschopoulou M, Karagianni A, Mendorou C, Polidoropoulos N, Papanicopoulos C, Stefanis P, Karamalegos C, Cazlaris H, Koutsilieris M, Mastrominas M, Gotts S, Doshi A, Harper J, Serhal P, Borini A, Guzeloglu-Kayisli O, Bianchi V, Seli E, Bianchi V, Lappi M, Bonu MA, Borini A, Mizuta S, Hashimoto H, Kuroda Y, Matsumoto Y, Mizusawa Y, Ogata S, Yamada S, Kokeguchi S, Noda Y, Shiotani M, Stojkovic M, Ilic M, Markovic N, Stojkovic P, Feng G, Zhang B, Zhou H, Zhou L, Gan X, Qin X, Shu J, Wu F, Molina Botella I, Lazaro Ibanez E, Debon Aucejo A, Pertusa J, Fernandez Colom PJ, Pellicer A, Li C, Zhang Y, Cui Y, Zhao H, Liu J, Oliveira JBA, Petersen CG, Mauri AL, Massaro FC, Silva LFI, Ricci J, Cavagna M, Pontes A, Vagnini LD, Baruffi RLR, Franco Jr. JG, Massaro FC, Petersen CG, Vagnini LD, Mauri AL, Silva LFI, Felipe V, Cavagna M, Pontes A, Baruffi RLR, Oliveira JBA, Franco Jr. JG, Vilela M, Tiveron M, Lombardi C, Viglierchio MI, Marconi G, Rawe V, Wale PL, Gardner DK, Nakagawa K, Sugiyama R, Nishi Y, Kuribayashi Y, Jyuen H, Yamashiro E, Shirai A, Sugiyama R, Inoue M, Salehnia M, Hovatta O, Tohonen V, Inzunza J, Parmegiani L, Cognigni GE, Bernardi S, Ciampaglia W, Infante FE, Tabarelli de Fatis C, Pocognoli P, Arnone A, Maccarini AM, Troilo E, Filicori M, Radwan P, Polac I, Borowiecka M, Bijak M, Radwan M. POSTER VIEWING SESSION - EMBRYOLOGY. Hum Reprod 2011. [DOI: 10.1093/humrep/26.s1.79] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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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Chi H, Huang FY, Chen MR, Chiu NC, Lee HC, Lin SP, Chen WF, Lin CL, Chan HW, Liu HF, Huang LM, Lee YJ. ITPKC gene SNP rs28493229 and Kawasaki disease in Taiwanese children. Hum Mol Genet 2010; 19:1147-51. [DOI: 10.1093/hmg/ddp586] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Xu B, Zefei J, Chua D, Shao Z, Luo R, Wang X, Yuan P, Newstat B, Liu Y, Gagnon R, Chi H, Martin A, Stein S, Wang L. Frequency of PIK
3CA Mutations in Chinese HER2+ Metastatic Breast Cancer Patients and Association with Clinical Benefit to Lapatinib and Capecitabine Treatment. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-09-1140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Activating mutations in PIK3CA are frequent in breast cancer (Campbell et al. Cancer Res 2004;64:7678-7681). Previous analyses suggest that the presence of PIK3CA activating mutations were associated with poor clinical outcome (Li et al. Breast Can Res Treat 2006;96:91-95) and could confer resistance to treatment with trastuzumab (T) (Berns et al. Cancer Cell 2007;12:395-402). Lapatinib (L) is an oral tyrosine kinase inhibitor targeting EGFR and HER2 pathways. L plus capecitabine (C) has demonstrated efficacy in women with HER2+ metastatic breast cancer (MBC) previously treated with T (Geyer et al. N Engl J Med 2006;355(26):2733-2743). EGF109491 evaluated the efficacy of L+C in 52 Chinese HER2+ MBC patients. The clinical benefit rate (CBR) was 57.7% (PR 44% and SD 44%) and median progression free survival (PFS) was 6.3 months. The purpose of this analysis was to establish the frequency of PIK3CA mutations in this small cohort of Chinese patients and to determine if the presence of a PIK3CA mutation has any impact on clinical benefit to L+C.Methods: 38/52 patients provided tumor samples for biomarker analysis. Briefly, DNA was extracted from these tumor samples, amplified by PCR and sequenced by Pyrosequencing methods to identify the presence of frequent activating mutations in exons 9 and 20 in PIK3CA. Mutation status was tested for association with CBR and PFS using contingency table analysis and proportional hazards analysis respectively.Results:11/38 (29%) patients harbored a mutation in the PIK3CA gene, consistent with published frequencies. 9/11 mutations reside in the catalytic domain and 2/11 mutations reside in the accessory domain of the gene. There was no statistical association with CBR (p=0.639) or PFS (HR=1.01, p=0.989) in PIK3CA wildtype patients vs. PIK3CA mutant patients. PIK3CA wildtype n=27 (%)PIK3CA Mutation n=11 (%)CR0 (0)0 (0)PR12 (44%)4 (36%)SD13 (48%)5 (45%)PD1 (4%)1 (9%)Unknown1 (4%)1 (9%)HR1.01 (p=0.989) Conclusion: The frequency of PIK3CA mutations in this small cohort of Chinese HER2+ MBC patients is consistent with published frequencies. There was no statistically significant association between the presence of a PIK3CA mutation and clinical benefit to L+C in these patients. These results are in agreement with previous reports that mutations in PIK3CA do not seem to impact clinical outcome following L-containing treatment regimens.
Citation Information: Cancer Res 2009;69(24 Suppl):Abstract nr 1140.
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Affiliation(s)
- B. Xu
- 1Cancer Hospital, Chinese Academy of Medical Sciences, China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - J. Zefei
- 2PLA 307 Hospital, China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - D. Chua
- 3Queen Mary Hospital, Hong Kong Special Administrative Region of China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - Z. Shao
- 4Cancer Hospital Affiliated to Fudan University, China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - R. Luo
- 5Nanfang Hospital, China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - X. Wang
- 6Zhejiang Cancer Hospital, China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - P. Yuan
- 1Cancer Hospital, Chinese Academy of Medical Sciences, China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - B. Newstat
- 10GlaxoSmithKline,
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - Y. Liu
- 8GlaxoSmithKline, PA, GlaxoSmithKline,
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - R. Gagnon
- 8GlaxoSmithKline, PA, GlaxoSmithKline,
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - H. Chi
- 11GlaxoSmithKline Company, Ltd, China, ChinaGlaxoSmithKline, GlaxoSmithKline,
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - A. Martin
- 8GlaxoSmithKline, PA, GlaxoSmithKline,
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - S. Stein
- 8GlaxoSmithKline, PA, GlaxoSmithKline,
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
| | - L. Wang
- 14GlaxoSmithKline Company Ltd, China, China
- 7Chinese Academy of Medical Sciences Cancer Hospital & Institute, China
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Xu B, Jiang Z, Chua D, Shao Z, Luo R, Wang X, Newstat B, Chi H, Chen G, Wang L. 5052 An open-label, single arm study of lapatinib and capecitabine in Chinese women with advanced or metastatic breast cancer (MBC). EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)70944-9] [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: 12/01/2022] Open
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Schneider MI, Sanchez N, Pineda S, Chi H, Ronco A. Impact of glyphosate on the development, fertility and demography of Chrysoperla externa (Neuroptera: Chrysopidae): ecological approach. Chemosphere 2009; 76:1451-5. [PMID: 19577273 DOI: 10.1016/j.chemosphere.2009.05.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2009] [Revised: 05/12/2009] [Accepted: 05/16/2009] [Indexed: 05/28/2023]
Abstract
Few ecotoxicological studies have used life table analysis to evaluate the toxicity of pesticides on beneficial organisms. This study is the first report of the effect of the herbicide glyphosate on a predator insect, Chrysoperla externa, using a demographic approach. This predator is associated to soybean pests and has a potential role as a biological control agent in the Neotropical Region. The objective of this work was to evaluate the side-effects of glyphosate on the development, fertility and demography of C. externa, treated orally by ingestion of glyphosate-dipped eggs of Sitotroga cerealella in laboratory conditions. The data were analyzed using the age-stage, two-sex life table. Development from third larval instar to pupae and adult longevity were shorter in glyphosate-treatment than in the control. Adult pre-reproductive period was longer in glyphosate-treatment than in the control. Fecundity and fertility were deeply reduced, as well, being fertility greater affected. A high important reduction was registered in all population parameters. Most eggs from glyphosate-treated cohort looked abnormal, smaller than control, dehydrated and became black 2d after oviposition. In addition, adults developed tumours in the abdomen region at 20d after emergence, being the effect more drastic in females than males. It is beyond the scope of our study to speculate on the effects of this herbicide on C. externa field populations. However, it seems likely that populations under continuous use of glyphosate would be exposed at greater detrimental effects in the long term.
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Affiliation(s)
- M I Schneider
- Centro de Estudios Parasitológicos y de Vectores, (CCT La Plata CONICET-UNLP), Calle 2 No. 584, La Plata, Bs. As, Argentina.
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Huh J, Moon H, Chi H, Chung W. Acute promyelocytic leukemia with i(17)(q10) on G-banding andPML/RARArearrangement by RT-PCR without evidence ofPML/RARArearrangement on FISH. Int J Lab Hematol 2009; 31:372-4. [DOI: 10.1111/j.1751-553x.2008.01040.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cao Y, Ang CM, Chua KC, Woo FW, Chi H, Bhawna B, Chong CT, Ganesan N, Ooi KE, Wah YL. Enhanced biological phosphorus removal in the retrofitting from an anoxic selector to an anaerobic selector in a full-scale activated sludge process in Singapore. Water Sci Technol 2009; 59:857-865. [PMID: 19273884 DOI: 10.2166/wst.2009.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This paper presents the investigation results of retrofitting an anoxic selector to an anaerobic selector through stepwise reduction of air supply in a full-scale activated sludge process with a focus on enhanced biological phosphorus removal (EBPR). The process experienced gradual shift from a Ludzack-Ettinger (LE) to an anaerobic-anoxic-oxic (A(2)O) process and subsequently, an anaerobic-oxic (A/O) process. The major findings are: (i) the average influent-based PO(4) (3-)-P release in the anaerobic selector compartment was 16.3 mg P l(-1) and that in the secondary clarifier was 1.7 mg P l(-1). 75% of the SCOD and 93% of the acetic acid in the primary effluent were taken up in the anaerobic selector compartment, respectively; (ii) PO(4) (3-)-P uptake contributed by both aerobic and denitrifying phosphorus accumulating organisms (DPAOs) occurred mainly in the first and second aerobic lanes together with simultaneous nitrification and denitrification (SND) while there was not much contribution from the last aerobic lane; (iii) The average PO(4) (3-)-P concentration of the final effluent was 2.4 mg P l(-1) corresponding to a removal efficiency of 85%; (iv) the SVI was satisfactory after retrofitting; and (v) the increase of NH(4) (+)-N in the final effluent from the commencement to the completion of the retrofitting resulted in an approximate 40-50% reduction in oxygen demand and a significant aeration energy saving was achieved.
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Affiliation(s)
- Y Cao
- Centre for Advanced Water Technology (CAWT), a division of PUB Consultants Private Limited (PUBC), The Toh Tuck Complex, 80/82 Toh Guan Road East, #C4-03, Singapore, 608575, Singapore.
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Dahmen U, Radtke A, Schröder T, Chi H, Madrahimov N, Lu M, Schenk A, Peitgen KH, Dirsch O. Median liver lobe of woodchuck as a model to study hepatic outflow obstruction: a pilot study. Liver Int 2008; 28:1236-44. [PMID: 18544125 DOI: 10.1111/j.1478-3231.2008.01797.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
BACKGROUND Hepatic vein outflow obstruction represents an important clinical problem in living-liver transplantation. An animal model is required to study the influence of outflow obstruction on the intrahepatic regulation of liver perfusion and the subsequent effects on liver injury and recovery during liver regeneration. The size of woodchucks enables the use of standard clinical imaging procedures. AIM This study aims at describing hepatic vascular and territorial anatomy of the woodchuck liver based on a virtual three-dimensional (3D) visualization of the hepatic vascular tree. METHODS Woodchucks (n=6) were subjected to an all-in-one computed tomography (CT) after contrasting the vascular and the biliary tree. CT-images were used for 3D-reconstruction of hepatic and portal veins and calculation of the corresponding portal and hepatic vein territories and their respective volume using hepavision (MeVisLab). A virtual resection was performed following the Cantlie-line and territories at risk were calculated. RESULTS The median lobe of the woodchuck liver has a similar vascular supply and drainage as the human liver with two portal (right and left median portal vein) and three hepatic veins (left, middle and right median hepatic vein). The corresponding portal and hepatic vein subterritories are of a similar relative size compared with the human liver. Virtual splitting of the median lobe of the woodchuck liver revealed areas at risk of focal outflow obstruction, as observed clinically. CONCLUSION The median liver lobe of the woodchuck represents, to a small extent, the hepatic vascular anatomy of the human liver and is therefore a suitable potential model to correlate repeated imaging of impaired liver perfusion with histomorphological findings of liver damage and regeneration.
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Affiliation(s)
- Uta Dahmen
- Department of General, Visceral and Transplantation Surgery, University Hospital of Essen, Essen, Germany.
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Liu Y, Li XY, Guo DS, Chi H. Synthesis ofl-cystine modified cyclodextrin monomers and dimers with primary-sideversussecondary-side and their molecular binding behaviours. Supramol Chem 2008. [DOI: 10.1080/10610270701543415] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Y. Liu
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
| | - X.-Y. Li
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
| | - D.-S. Guo
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
| | - H. Chi
- a Department of Chemistry, State Key Laboratory of Elemento-Organic Chemistry , Nankai University , Tianjin, People's Republic of China
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Lee H, Lee J, Hur E, Lee M, Choi S, Lee J, Seo E, Kim Y, Chi H, Park C, Lee K. Clinical significance of GSTM1 and GSTT1 polymorphisms in younger patients with acute myeloid leukemia of intermediate risk cytogenetics. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.7066] [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: 11/20/2022] Open
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Kang S, Ryu C, Lee J, Seo Y, Roh S, Chi H. What is a more effective protocol between conventional IVF and ICSI to fertilize oocytes with the sperm that shows strict morphology score (SMS) 4–14%? Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.486] [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: 11/24/2022]
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Chung H, Cho Y, Chi H, Jang S, Park C. ESTABLISHMENT OF REFERENCE INTERVALS OF PLATELET FUNCTION ANALYZER-100 CLOSURE TIMES IN HEALTHY KOREAN ADULTS. J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb00440.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jiang J, Zhou J, Chen J, Wei X, Lu T, Chi H, Zhao R. Effect of chicken egg yolk antibody against adipose tissue plasma membranes on carcass composition and lipogenic hormones and enzymes in pigs. Livest Sci 2007. [DOI: 10.1016/j.livsci.2006.09.020] [Citation(s) in RCA: 8] [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: 11/27/2022]
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Lu M, Yao X, Xu Y, Lorenz H, Dahmen U, Chi H, Dirsch O, Kemper T, He L, Glebe D, Gerlich W, Wen Y, Roggendorf M. O.103 Combination therapy with antiviral drugs and immunomodulation against chronic hepatitis B virus infection: Evaluation in the woodchuk model. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80099-5] [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: 12/01/2022]
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Chi H, Tao XM, Yang DX, Chen KS. Simultaneous measurement of axial strain, temperature, and transverse load by a superstructure fiber grating. Opt Lett 2001; 26:1949-51. [PMID: 18059741 DOI: 10.1364/ol.26.001949] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
A novel and simple fiber-optic sensor based on a superstructure fiber grating for simultaneous measurement of temperature, axial strain, and transverse load is proposed and demonstrated. By measurement of the shift and split of broadband and narrow-band loss peaks, one can determine the temperature, axial strain, and transverse load simultaneously over the ranges 0-140 degrees , 0-1200muepsilon, and 0-0.3 kg/mm, respectively.
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Chi H, Sun W, Chan WT, Lee HC, Fang SB. Pediatric Salmonella enterocolitis in a teaching hospital in Taitung: A four-year analysis. Acta Paediatr Taiwan 2001; 42:297-300. [PMID: 11729707] [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: 02/22/2023]
Abstract
In order to understand the childhood Salmonella enterocolitis in Taitung, we retrospectively collected the patients with the diagnosis of acute enterocolitis who were admitted to the pediatric wards of Taitung branch of Mackay Memorial Hospital from January 1, 1995 to December 31, 1998. Salmonella enterocolitis accounted for 16.8% of the total cases of acute enterocolitis. The mean age of the patients was 14.6 +/- 14.1 months old. Seventy-nine patients were male and 78 patients were female. Eighty-two patients lived in the urban area and 75 patients lived in the suburbs. The mean duration from onset of illness to admission was 2.6 +/- 1.9 days. The mean duration of hospitalization was 6.6 +/- 4.8 days. The peak incidence was in August and September. The most common clinical manifestations were fever (74.5%) and blood stool (46.5%). In 157 patients, Salmonella serogroup B was isolated from stool in 115 patients. The rate of bacteremia was 4.5%. Serogroup D accounted for 28.6% of the bacteremia. Two patients developed meningitis and one patient had osteomyelitis. Of 88 patients examined for rotavirus, 12 had positive results. There was neither bowel perforation nor mortality recorded in our study.
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Affiliation(s)
- H Chi
- Department of Pediatrics, Taitung Branch of Mackay Memorial Hospital, 1, Lane 303, Chang Sha Street, Taitung, 950, Taiwan
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Gimm O, Chi H, Dahia PL, Perren A, Hinze R, Komminoth P, Dralle H, Reynolds PR, Eng C. Somatic mutation and germline variants of MINPP1, a phosphatase gene located in proximity to PTEN on 10q23.3, in follicular thyroid carcinomas. J Clin Endocrinol Metab 2001; 86:1801-5. [PMID: 11297621 DOI: 10.1210/jcem.86.4.7419] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Various genes have been identified to play a role in the pathogenesis of follicular thyroid tumors. Cowden syndrome is the only known familial syndrome with an increased risk of both follicular thyroid adenoma (FA) and carcinoma (FTC). Germline mutations in the tumor suppressor gene PTEN, which encodes a dual-specificity phosphatase, have been found in up to 80% of patients with Cowden syndrome suggesting a role of PTEN in the pathogenesis of follicular thyroid tumors. Although somatic intragenic mutations in PTEN, which maps to 10q23.3, are rarely found in follicular tumors, loss of heterozygosity (LOH) of markers within 10q22-24 occurs in about 25%. Recently, another phosphatase gene, MINPP1, has been localized to 10q23.3. MINPP1 has the ability to remove 3-phosphate from inositol phosphate substrates, a function that overlaps that of PTEN. Because of this overlapping function with PTEN and the physical location of MINPP1 to a region with frequent LOH in follicular thyroid tumors, we considered it to be an excellent candidate gene that could contribute to the pathogenesis of follicular thyroid tumors. We analyzed DNA from tumor and corresponding normal tissue from 23 patients with FA and 15 patients with FTC for LOH and mutations at the MINPP1 locus. LOH was identified in four malignant and three benign tumors. One of these FTCs with LOH was found to harbor a somatic c.122C > T or S41L mutation. We also found two germline sequence variants, c.809A > G (Q270R) and IVS3 + 34T > A. The c.809A > G variant was found in only one patient with FA but not in patients with FTC or normal controls. More interestingly, IVS3 + 34T > A was found in about 15% of FA cases and normal controls but not in patients with FTC. These results suggest a role for MINPP1 in the pathogenesis of at least a subset of malignant follicular thyroid tumors, and MINPP1 might act as a low penetrance predisposition allele for FTC.
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Affiliation(s)
- O Gimm
- Clinical Cancer Genetics Program, Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio 43210, USA
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Ahn J, Lee K, Lee J, Lee J, Park C, Chi H, Kim W. A case of refractory idiopathic pure red cell aplasia responsive to fludarabine treatment. Br J Haematol 2001; 112:527-9. [PMID: 11167858 DOI: 10.1046/j.1365-2141.2001.02540.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Dahia PM, Gimm O, Chi H, Marsh DJ, Reynolds PR, Eng C. Absence of germline mutations in MINPP1, a phosphatase encoding gene centromeric of PTEN, in patients with Cowden and Bannayan-Riley-Ruvalcaba syndrome without germline PTEN mutations. J Med Genet 2000; 37:715-7. [PMID: 11182934 PMCID: PMC1734693 DOI: 10.1136/jmg.37.9.715] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Chi H, Yang X, Kingsley PD, O'Keefe RJ, Puzas JE, Rosier RN, Shears SB, Reynolds PR. Targeted deletion of Minpp1 provides new insight into the activity of multiple inositol polyphosphate phosphatase in vivo. Mol Cell Biol 2000; 20:6496-507. [PMID: 10938126 PMCID: PMC86124 DOI: 10.1128/mcb.20.17.6496-6507.2000] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Multiple inositol polyphosphate phosphatase (Minpp1) metabolizes inositol 1,3,4,5,6-pentakisphosphate (InsP(5)) and inositol hexakisphosphate (InsP(6)) with high affinity in vitro. However, Minpp1 is compartmentalized in the endoplasmic reticulum (ER) lumen, where access of enzyme to these predominantly cytosolic substrates in vivo has not previously been demonstrated. To gain insight into the physiological activity of Minpp1, Minpp1-deficient mice were generated by homologous recombination. Tissue extracts from Minpp1-deficient mice lacked detectable Minpp1 mRNA expression and Minpp1 enzyme activity. Unexpectedly, Minpp1-deficient mice were viable, fertile, and without obvious defects. Although Minpp1 expression is upregulated during chondrocyte hypertrophy, normal chondrocyte differentiation and bone development were observed in Minpp1-deficient mice. Biochemical analyses demonstrate that InsP(5) and InsP(6) are in vivo substrates for ER-based Minpp1, as levels of these polyphosphates in Minpp1-deficient embryonic fibroblasts were 30 to 45% higher than in wild-type cells. This increase was reversed by reintroducing exogenous Minpp1 into the ER. Thus, ER-based Minpp1 plays a significant role in the maintenance of steady-state levels of InsP(5) and InsP(6). These polyphosphates could be reduced below their natural levels by aberrant expression in the cytosol of a truncated Minpp1 lacking its ER-targeting N terminus. This was accompanied by slowed cellular proliferation, indicating that maintenance of cellular InsP(5) and InsP(6) is essential to normal cell growth. Yet, depletion of cellular inositol polyphosphates during erythropoiesis emerges as an additional physiological activity of Minpp1; loss of this enzyme activity in erythrocytes from Minpp1-deficient mice was accompanied by upregulation of a novel, substitutive inositol polyphosphate phosphatase.
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Affiliation(s)
- H Chi
- Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, USA
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Liu Z, Cheng J, Peng J, Zhou H, Luo B, Chi H. [Risk factors of type 2 diabetes in Shenzhen]. Zhonghua Yu Fang Yi Xue Za Zhi 2000; 34:232-4. [PMID: 11860938] [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: 02/23/2023]
Abstract
OBJECTIVE The study was designed to investigate the risk factors of Type 2 diabetes in the new city Shenzhen. METHODS A representative sample of 8,182 adults aged over 20 to 75 years old were randomly selected in the residents of Shenzhen, China in 1997. Type 2 diabetes was diagnosed according to the WHO criteria. Questionnaire survey, anthropometric measurement and blood analysis were carried out, and logistic regression analysis was used to study the risk factors. RESULTS The results showed that the prevalence of type 2 diabetes in subjects with high total cholesterol were 4.9 times of those with lower TC value. Subjects with high triglyceride had a prevalence 5.7 times of those who had lower TG. Those HDL-ch had a prevalence 68.7% higher than those with normal HDL-ch value; on the other hand, those HDL-ch > 1.91 mmol/L were 44.6% lower in the prevalence than those with normal HDL-ch. The prevalence of type 2 diabetes in subjects with BMI >or= 25 were 2.6 times of those with BMI < 25. Subject with hypertension (>or= 140/90 mm Hg) had a prevalence 3.8 times of those with normal blood pressure. Subjects with family history of type II diabetes had a prevalence 2.0 times of no family history, and women who had delivered babies over 4 kg had a prevalence 1.9 times of those who had babies less than 4 kg. Subjects with waist/hip ratio (WHR) >or= 1.0 had a prevalence 5.1 times of those with WHR < 1.0. The prevalence of type 2 Diabetes was higher with increasing amount of cigarette smoking and the duration (in years) of smoking or increasing drinking (alcohol) and the duration (in years) of drinking. CONCLUSIONS The blood glucose level was found to be positively correlated with TC or TG, and negatively correlated with HDL-ch. This study demonstrated again that TC, TG, HDL-ch, obesity, hypertension, family history of type 2 diabetes and in women, delivery of babies over 4 kg and age were risk factors of type 2 diabetes.
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Affiliation(s)
- Z Liu
- Diabetes Research Center, Chinese Academy of Preventive Medicine, Beijing 100050, China
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Abstract
We propose a novel connectionist method for the use of different feature sets in pattern classification. Unlike traditional methods, e.g., combination of multiple classifiers and use of a composite feature set, our method copes with the problem based on an idea of soft competition on different feature sets developed in our earlier work. An alternative modular neural network architecture is proposed to provide a more effective implementation of soft competition on different feature sets. The proposed architecture is interpreted as a generalized finite mixture model and, therefore, parameter estimation is treated as a maximum likelihood problem. An EM algorithm is derived for parameter estimation and, moreover, a model selection method is proposed to fit the proposed architecture to a specific problem. Comparative results are presented for the real world problem of speaker identification.
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Affiliation(s)
- K Chen
- National Laboratory of Machine Perception and Center for Information Science, Peking University, Beijing, China.
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Abstract
Mixture of experts (ME) is a modular neural network architecture for supervised learning. A double-loop Expectation-Maximization (EM) algorithm has been introduced to the ME architecture for adjusting the parameters and the iteratively reweighted least squares (IRLS) algorithm is used to perform maximization in the inner loop [Jordan, M.I., Jacobs, R.A. (1994). Hierarchical mixture of experts and the EM algorithm, Neural Computation, 6(2), 181-214]. However, it is reported in literature that the IRLS algorithm is of instability and the ME architecture trained by the EM algorithm, where IRLS algorithm is used in the inner loop, often produces the poor performance in multiclass classification. In this paper, the reason of this instability is explored. We find out that due to an implicitly imposed incorrect assumption on parameter independence in multiclass classification, an incomplete Hessian matrix is used in that IRLS algorithm. Based on this finding, we apply the Newton-Raphson method to the inner loop of the EM algorithm in the case of multiclass classification, where the exact Hessian matrix is adopted. To tackle the expensive computation of the Hessian matrix and its inverse, we propose an approximation to the Newton-Raphson algorithm based on a so-called generalized Bernoulli density. The Newton-Raphson algorithm and its approximation have been applied to synthetic data, benchmark, and real-world multiclass classification tasks. For comparison, the IRLS algorithm and a quasi-Newton algorithm called BFGS have also been applied to the same tasks. Simulation results have shown that the use of the proposed learning algorithms avoids the instability problem and makes the ME architecture produce good performance in multiclass classification. In particular, our approximation algorithm leads to fast learning. In addition, the limitation of our approximation algorithm is also empirically investigated in this paper.
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Affiliation(s)
- K Chen
- Department of Computer Science and Engineering, Chinese University of Hong Kong, Shatin, NT, Hong Kong, People's Republic of China
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Chi H, Yang G. [Brief introduction to tissue engineering]. Zhonghua Zheng Xing Shao Shang Wai Ke Za Zhi 1999; 15:231-3. [PMID: 11501131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Chi H, Tiller GE, Dasouki MJ, Romano PR, Wang J, O'keefe RJ, Puzas JE, Rosier RN, Reynolds PR. Multiple inositol polyphosphate phosphatase: evolution as a distinct group within the histidine phosphatase family and chromosomal localization of the human and mouse genes to chromosomes 10q23 and 19. Genomics 1999; 56:324-36. [PMID: 10087200 DOI: 10.1006/geno.1998.5736] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Multiple inositol polyphosphate phosphatase is the only enzyme known to hydrolyze the abundant metabolites inositol pentakisphosphate and inositol hexakisphosphate. We have previously demonstrated that the chick homolog of multiple inositol polyphosphate phosphatase, designated HiPER1, has a role in growth plate chondrocyte differentiation. The relationship of these enzymes to intracellular signaling is obscure, and as part of our investigation we have examined the murine ((MMU)Minpp1) and human ((HSA)MINPP1) homologs. Northern blot analysis demonstrated expression of ((MMU)Minpp1 in a variety of mouse tissues, comparable to the expression of other mammalian homologs, but less restricted than the expression of HiPER1 in chick. A purified (MMU)Minpp1 fusion protein cleaved phosphate from inositol (1,3,4,5)-tetrakisphosphate and para-nitrophenyl phosphate. When the presumptive active site histidine was altered to alanine by site-directed mutagenesis, enzyme activity was abolished, confirming the classification of (MMU)Minpp1 as a histidine phosphatase. The amino acid sequences of the murine and human MINPP proteins share >80% identity with the rat enzyme and >56% identity with HiPER1, with conservation of the C-terminal consensus sequence that retains proteins in the endoplasmic reticulum. The intron/exon structure of the mammalian (MMU)Minpp1 and (HSA)MINPP1 genes is also conserved compared to the chick HiPER1 gene. Sequence analysis of plant and fruit fly MINPP homologs supports the hypothesis that the MINPP enzymes constitute a distinct evolutionary group within the histidine phosphatase family. We have mapped (HSA)MINPP1 to human chromosome 10q23 by fluorescence in situ hybridization, YAC screening, and radiation hybrid mapping. This assignment places (HSA)MINPP1 in a region of chromosome 10 that is frequently mutated in human cancers and places (HSA)MINPP1 proximal to the tumor suppressor PTEN, which maps to 10q23.3. Using a radiation hybrid panel, we localized (MMU)Minpp1 to a region of mouse chromosome 19 that includes the murine homolog of Pten. The evolutionary conservation of this novel enzyme within the inositol polyphosphate pathway suggests a significant role for multiple inositol polyphosphate phosphatase throughout higher eukaryotes.
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Affiliation(s)
- H Chi
- Department of Orthopaedics, University of Rochester School of Medicine and Dentistry, Rochester, New York 14642, USA
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Chi H, Kang Z, Hu G. [Detection of fetal DNA in maternal plasma using the nested polymerase chain reaction]. Zhonghua Fu Chan Ke Za Zhi 1999; 34:27-9. [PMID: 11263169] [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: 02/19/2023]
Abstract
OBJECTIVE To search for a new method of non-invasive prenatal gene diagnosis. METHODS A single-copy human DYS14 gene of Y-chromosome of fetal DNA sequence was amplified by nested polymerase chain reaction (PCR) from twelve pregnant maternal plasma (12-40 weeks). A 239 bp and 198 bp specific fragment were obtained. The maternal plasma samples of twelve pregnant women were used directly for nested PCR. RESULTS The fragment was identified in 8 of 10 male-bearing pregnant women plasma. The diagnostic accordance rate was 80% (8/10), 6 to 8 women gave positive signals in two consecutive amplifications, 2 of 8 women gave positive signals in the second amplification. The rate of positive was increased greatly by nested PCR (from 60% to 80%). None of the other 2 female-bearing pregnant women had positive results. The final accuracy of 83.3% (10/12) was attained in all cases. CONCLUSION The finding of circulating fetal DNA in maternal plasma may have new implications for non-invasive prenatal gene diagnosis, and the nested PCR possesses the advantages of sensitivity and specificity which improves the clinical application.
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Affiliation(s)
- H Chi
- Second Affiliated Hospital, Harbin Medical University, Harbin 150086
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Shindo T, Kurihara H, Ohishi N, Morita H, Maemua K, Kurihara Y, Tsuneyoshi H, Chi H, Yamaoki K, Yazaki Y. Images in cardiovascular medicine. Cardiac sarcoidosis. Circulation 1998; 97:1306-7. [PMID: 9570202 DOI: 10.1161/01.cir.97.13.1306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Moudgil K, Chang T, Eradat H, Chen A, Chi H, Sachdev S, Canceko J, Kim E, Gupta R, Brahn E, Sercarz E. Diversification of T cell responses to C-terminal determinants within hsp65 is involved in regulation of autoimmune arthritis. Immunol Lett 1997. [DOI: 10.1016/s0165-2478(97)86537-6] [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: 11/24/2022]
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Affiliation(s)
- K Chen
- Department of Computer and Information Science, The Ohio State University, Columbus, OH 43210-1277 USA
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