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Lu CC, Wei RX, Deng DH, Luo ZY, Abdulai M, Liu HH, Kang B, Hu SQ, Li L, Xu HY, Hu JW, Wei SH, Han CC. Effect of different types of sugar on gut physiology and microbiota in overfed goose. Poult Sci 2021; 100:101208. [PMID: 34102480 PMCID: PMC8187246 DOI: 10.1016/j.psj.2021.101208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 01/07/2021] [Revised: 04/02/2021] [Accepted: 04/11/2021] [Indexed: 01/11/2023] Open
Abstract
To explored the difference of goose fatty liver formation induced-by different types of sugar from the intestinal physiology and the gut microflora, an integrated analysis of intestinal physiology and gut microbiota metagenomes was performed using samples collected from the geese including the normal-feeding geese and the overfed geese which were overfed with maize flour or overfeeding dietary supplementation with 10% sugar (glucose, fructose or sucrose, respectively), respectively. The results showed that the foie gras weight of the fructose group and the sucrose group was heavier (P < 0.05) than other groups. Compared with the control group, the ileum weight was significantly higher (P < 0.01), and the cecum weight was significantly lower in the sugar treatment groups (P < 0.001). Compared with the control group, the ratio of villi height to crypt depth in the fructose group was the highest in jejunum (P < 0.05); the trypsin activity of the ileum was higher in the fructose group and the sucrose group (P < 0.05). At the phylum level, Firmicutes, Proteobacteria and Bacteroidetes were the main intestinal flora of geese; and the abundance of Firmicutes in the jejunum was higher in the sugar treatment groups than that of the maize flour group. At the genus level, the abundance of Lactobacillus in the jejunum was higher (P < 0.05) in the sugar treatment groups than that of the maize flour group. In conclusion, forced-feeding diet supplementation with sugar induced stronger digestion and absorption capacity, increased the abundance of Firmicutes and Bacteroidetes and the abundance of Lactobacillus (especially fructose and sucrose) in the gut. So, the fructose and sucrose had higher induction on hepatic steatosis in goose fatty liver formation.
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Affiliation(s)
- C C Lu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - R X Wei
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - D H Deng
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - Z Y Luo
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - M Abdulai
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - H H Liu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - B Kang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - S Q Hu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - L Li
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - H Y Xu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - J W Hu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - S H Wei
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China
| | - C C Han
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, Sichuan, 611130, P.R. China.
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Du JB, Tao SY, Lin Y, Zhao Y, Lyu G, Xia YK, Lu CC, Wu W, Ma HX, Jin GF, Hu ZB, Shen HB. [Application of cloud-based information platform in China National Birth Cohort]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:586-590. [PMID: 34814434 DOI: 10.3760/cma.j.cn112338-20201211-01404] [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: 06/13/2023]
Abstract
Birth cohort is an important observational study which can continuously and dynamically collect the exposure changes and health outcomes from gametophyte development to adolescence and even old age. However, because of its complex design and difficult implementation, how to construct birth cohort with high quality and high efficiency is the main difficulty faced by epidemiologists at home and abroad. In 2016, China National Birth Cohort was officially launched. The network and information technology were used to explore, and a set of "cloud-based information platform" was established to support this queue construction, containing 16 units in China. After four years of development, the platform has formed a complete set of programs about the construction of cohort information platform, which including recruitment and follow-up management of participants, real-time data interaction, queue quality control, multi-level authority management and function division. The relevant design framework and functional elements provide the references to the future information construction of large-scale birth cohort and even population-based research in China.
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Affiliation(s)
- J B Du
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - S Y Tao
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Y Lin
- State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China Department of Maternal, Child and Adolescent Health, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Y Zhao
- Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - G Lyu
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Y K Xia
- State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - C C Lu
- State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - W Wu
- State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - H X Ma
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China
| | - G F Jin
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China
| | - Z B Hu
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China
| | - H B Shen
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China State Key Laboratory of Reproductive Medicine, Center for Global Health, Nanjing Medical University, Nanjing 211166, China
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Chen YL, Lin CC, Yang SC, Chen WL, Chen JR, Hou YH, Lu CC, Chow NH, Su WC, Ho CL. Five Technologies for Detecting the EGFR T790M Mutation in the Circulating Cell-Free DNA of Patients With Non-small Cell Lung Cancer: A Comparison. Front Oncol 2019; 9:631. [PMID: 31380273 PMCID: PMC6646711 DOI: 10.3389/fonc.2019.00631] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Accepted: 06/26/2019] [Indexed: 12/24/2022] Open
Abstract
Third-generation tyrosine kinase inhibitors (TKIs) were developed to overcome T790M-mediated resistance to earlier generations of epidermal growth factor receptor (EGFR)-targeted TKIs. We compared four well-established and one in-house method for the analysis of the EGFR T790M mutation in plasma cell-free DNA (cfDNA), in hope to find a better way to select non-small cell lung cancer (NSCLC) patients appropriate for 3rd-generation TKI therapy. For sensitivity levels of each method, plasmid DNA with EGFR T790M mutations was serially diluted with cfDNA from healthy controls with wild type EGFR. The clinical performance was analyzed in a clinical cohort of EGFR mutation-positive NSCLC patients with acquired EGFR TKI resistance (n = 40). All methods except the therascreen kit (Qiagen) had a sensitivity level of 10 copies of T790M plasmid DNA in the spiked specimen. The detection rates of the EGFR T790M mutation in plasma cfDNA from the clinical cohort were 42.5, 35, 32.5, 22.5, and 17.5% for the in-house ARMS method, Bio-Rad droplet digital PCR, PANAMutyper, Therascreen EGFR Plasma RGQ PCR Kit and Cobas EGFR Mutation kit (with suboptimal template amounts), respectively. Osimertinib was given to 17 of 20 patients with EGFR T790M mutations. The best treatment responses, based on the RECIST criteria, included 6 partial responses (PR) and 7 stable diseases (SD). The PANAMutyper and the Bio-Rad droplet digital PCR were comparable, the Cobas EGFR Mutation kit required significantly more template for testing. The best combination would be the in-house ARMS method plus the PANAMutyper or Bio-Rad droplet digital PCR, which would have a detection rate of 50% (20/40) and a disease control rate of 76% (13/17).
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Affiliation(s)
- Yi-Lin Chen
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.,Association of Medical Technologists, Tainan, Taiwan
| | - Chien-Chung Lin
- Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Shu-Ching Yang
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Wan-Li Chen
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Jian-Rong Chen
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Yi-Hsin Hou
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Cheng-Chan Lu
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.,College of Medicine, Institute of Molecular Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Nan-Haw Chow
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.,College of Medicine, Institute of Molecular Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wu-Chou Su
- Department of Internal Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.,College of Medicine, Institute of Molecular Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chung-Liang Ho
- Molecular Diagnosis Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan.,Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.,College of Medicine, Institute of Molecular Medicine, National Cheng Kung University, Tainan, Taiwan
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Yeh YC, Kuo HY, Chang WL, Yang HB, Lu CC, Cheng HC, Wu MS, Sheu BS. H. pylori isolates with amino acid sequence polymorphisms as presence of both HtrA-L171 & CagL-Y58/E59 increase the risk of gastric cancer. J Biomed Sci 2019; 26:4. [PMID: 30611258 PMCID: PMC6321681 DOI: 10.1186/s12929-019-0498-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 01/02/2019] [Indexed: 12/14/2022] Open
Abstract
Background H. pylori CagL-Y58/E59 increase gastric cancer risk by stronger binding with integrin to faciliate type IV secretory system (T4SS). H. pylori can secrete high temperature requirement A (HtrA) to mediate E-Cadherin cleavage for gastric epithelial junction disruption, so H. pylori CagL can adhere to integrin located on basolateral side of epithelium. The study test whether H. pylori HtrA amino acid polymorphisms can increase gastric cancer risk synergistically with CagL-Y58/E59. Methods One-hundred and sixty-four H. pylori-positive patients, including 71 with non-ulcer dyspepsia (NUD), 63 with peptic ulcers (PU), and 30 with gastric cancers (GC), were enrolled to receive upper gastrointestinal endoscopy to obtain gastric biopsies for H. pylori culture and histology by the updated Sydney system. Each isolate was screened for htrA & cagL genotype by polymerase chain reaction and HtrA & CagL-Y58/E59 amino acid sequence polymorphisms by sequencing. Results The prevalence rates of htrA & cagL gene were both 100%. The HtrA amino acid sequence polymorphisms were not different between NUD and PU. The H. pylori isolates of GC had higher rates of HtrA residue 171 as leucine than those of NUD (73.3% vs. 50.7%, P = 0.036, OR[95%CI] = 2.7[1.1–6.8]). The risk of the H. pylori-infected subjects to get gastric cancer was increased up to 15.4-fold, if the infected isolates had presence of both HtrA-L171 and CagL-Y58/E59 (P < 0.001). Conclusions The H. pylori isolates of gastric cancer subjects had a higher rate of HtrA-L171. H. pylori isolates with presence of both HtrA-171 & CagL-Y58/E59 can synergistically increase the risk of gastric cancer. Electronic supplementary material The online version of this article (10.1186/s12929-019-0498-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yi-Chun Yeh
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsin-Yu Kuo
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wei-Lun Chang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiao-Bai Yang
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Pathology, Ton Yen General Hospital, Hsin-Chu, Taiwan
| | - Cheng-Chan Lu
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiu-Chi Cheng
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Ming-Shiang Wu
- Department of Internal Medicine, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - Bor-Shyang Sheu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, 125 Chuang Shan Road, Tainan, Taiwan.
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Chang CYY, Lai MT, Chen Y, Yang CW, Chang HW, Lu CC, Chen CM, Chan C, Chung C, Tseng CC, Hwang T, Sheu JJC, Tsai FJ. Up-regulation of ribosome biogenesis by MIR196A2 genetic variation promotes endometriosis development and progression. Oncotarget 2018; 7:76713-76725. [PMID: 27741504 PMCID: PMC5363543 DOI: 10.18632/oncotarget.11536] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 08/09/2016] [Indexed: 12/28/2022] Open
Abstract
Aberrant miRNA expression has been reported in endometriosis and miRNA gene polymorphisms have been linked to cancer. Because certain ovarian cancers arise from endometriosis, we genotyped seven cancer-related miRNA single nucleotide polymorphisms (MiRSNPs) to investigate their possible roles in endometriosis. Genetic variants in MIR196A2 (rs11614913) and MIR100 (rs1834306) were found to be associated with endometriosis development and related clinical phenotypes, such as infertility and pain. Downstream analysis of the MIR196A2 risk allele revealed upregulation of rRNA editing and protein synthesis genes, suggesting hyper-activation of ribosome biogenesis as a driving force for endometriosis progression. Clinical studies confirmed higher levels of small nucleolar RNAs and ribosomal proteins in atypical endometriosis lesions, and this was more pronounced in the associated ovarian clear cell carcinomas. Treating ovarian clear cells with CX5461, an RNA polymerase I inhibitor, suppressed cell growth and mobility followed by cell cycle arrest at G2/M stage and apoptosis. Our study thus uncovered a novel tumorigenesis pathway triggered by the cancer-related MIR196A2 risk allele during endometriosis development and progression. We suggest that anti-RNA polymerase I therapy may be efficacious for treating endometriosis and associated malignancies.
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Affiliation(s)
- Cherry Yin-Yi Chang
- Department of Obstetrics and Gynecology, China Medical University Hospital, Taichung, Taiwan.,Institute of Environmental Health, China Medical University, Taichung, Taiwan
| | - Ming-Tsung Lai
- Department of Pathology, Taichung Hospital, Ministry of Health and Welfare, Taichung, Taiwan
| | - Yi Chen
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan
| | - Ching-Wen Yang
- The Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan.,Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Hui-Wen Chang
- School of Medicine, China Medical University, Taichung, Taiwan
| | - Cheng-Chan Lu
- The Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan
| | - Chih-Mei Chen
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan
| | - Carmen Chan
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan
| | - Ching Chung
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan
| | - Chun-Cheng Tseng
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Tritium Hwang
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Jim Jinn-Chyuan Sheu
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan.,Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan.,School of Chinese Medicine, China Medical University, Taichung, Taiwan.,Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan
| | - Fuu-Jen Tsai
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan.,School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan
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Jones BE, South BR, Shao Y, Lu CC, Leng J, Sauer BC, Gundlapalli AV, Samore MH, Zeng Q. Development and Validation of a Natural Language Processing Tool to Identify Patients Treated for Pneumonia across VA Emergency Departments. Appl Clin Inform 2018; 9:122-128. [PMID: 29466818 DOI: 10.1055/s-0038-1626725] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND Identifying pneumonia using diagnosis codes alone may be insufficient for research on clinical decision making. Natural language processing (NLP) may enable the inclusion of cases missed by diagnosis codes. OBJECTIVES This article (1) develops a NLP tool that identifies the clinical assertion of pneumonia from physician emergency department (ED) notes, and (2) compares classification methods using diagnosis codes versus NLP against a gold standard of manual chart review to identify patients initially treated for pneumonia. METHODS Among a national population of ED visits occurring between 2006 and 2012 across the Veterans Affairs health system, we extracted 811 physician documents containing search terms for pneumonia for training, and 100 random documents for validation. Two reviewers annotated span- and document-level classifications of the clinical assertion of pneumonia. An NLP tool using a support vector machine was trained on the enriched documents. We extracted diagnosis codes assigned in the ED and upon hospital discharge and calculated performance characteristics for diagnosis codes, NLP, and NLP plus diagnosis codes against manual review in training and validation sets. RESULTS Among the training documents, 51% contained clinical assertions of pneumonia; in the validation set, 9% were classified with pneumonia, of which 100% contained pneumonia search terms. After enriching with search terms, the NLP system alone demonstrated a recall/sensitivity of 0.72 (training) and 0.55 (validation), and a precision/positive predictive value (PPV) of 0.89 (training) and 0.71 (validation). ED-assigned diagnostic codes demonstrated lower recall/sensitivity (0.48 and 0.44) but higher precision/PPV (0.95 in training, 1.0 in validation); the NLP system identified more "possible-treated" cases than diagnostic coding. An approach combining NLP and ED-assigned diagnostic coding classification achieved the best performance (sensitivity 0.89 and PPV 0.80). CONCLUSION System-wide application of NLP to clinical text can increase capture of initial diagnostic hypotheses, an important inclusion when studying diagnosis and clinical decision-making under uncertainty.
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Yang YJ, Wu CT, Ou HY, Lin CH, Cheng HC, Chang WL, Chen WY, Yang HB, Lu CC, Sheu BS. Male non-insulin users with type 2 diabetes mellitus are predisposed to gastric corpus-predominant inflammation after H. pylori infection. J Biomed Sci 2017; 24:82. [PMID: 29082856 PMCID: PMC5662095 DOI: 10.1186/s12929-017-0389-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 10/22/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Both H. pylori infection and diabetes increase the risk of gastric cancer. This study investigated whether patients with type 2 diabetes mellitus (T2DM) and H. pylori infection had more severe corpus gastric inflammation and higher prevalence of precancerous lesions than non-diabetic controls. METHODS A total of 797 patients with type 2 diabetes mellitus were screened for H. pylori, of whom 264 had H. pylori infection. Of these patients, 129 received esophagogastroduodenoscopy to obtain topographic gastric specimens for gastric histology according to the modified Updated Sydney System, corpus-predominant gastritis index (CGI), Operative Link on Gastritis Assessment, and Operative Link on Gastric Intestinal Metaplasia Assessment. Non-diabetic dyspeptic patients who had H. pylori infection confirmed by esophagogastroduodenoscopy were enrolled as controls. RESULTS The male as well as total T2DM patients had higher acute/chronic inflammatory and lymphoid follicle scores in the corpus than non-diabetic controls (p < 0.05). In contrast, the female T2DM patients had higher chronic inflammatory scores in the antrum than the controls (p < 0.05). In T2DM patients, the males had significantly higher rates of CGI than the females (p < 0.05). Multivariate logistic regression analysis showed that male patients (odds ratio: 2.28, 95% confidence interval: 1.11-4.69, p = 0.025) and non-insulin users (odds ratio: 0.33, 95% confidence interval: 0.15-0.74, p = 0.007) were independent factors for the presence of CGI in the H. pylori-infected patients with type 2 diabetes mellitus. CONCLUSIONS Patients with type 2 diabetes mellitus and H. pylori infection had more severe corpus gastric inflammation than non-diabetic controls. Moreover, male gender and non-insulin users of T2DM patients were predisposed to have corpus-predominant gastritis after H. pylori infection. TRIAL REGISTRATION ClinicalTrial: NCT02466919 , retrospectively registered may 17, 2015.
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Affiliation(s)
- Yao-Jong Yang
- Departments of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chung-Tai Wu
- Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Horng-Yih Ou
- Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Chin-Han Lin
- Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiu-Chi Cheng
- Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wei-Lun Chang
- Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wei-Ying Chen
- Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiao-Bai Yang
- Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Pathology, Ton-Yen General Hospital, Hsin-Chu, County, Taiwan
| | - Cheng-Chan Lu
- Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bor-Shyang Sheu
- Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Institutes of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Tainan, Taiwan
- Department of Internal Medicine, National Cheng Kung University Hospital, 138 Sheng Li Road, Tainan, 70428 Taiwan
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Yang YJ, Wu CT, Ou HY, Lin CH, Cheng HC, Chang WL, Chen WY, Yang HB, Lu CC, Sheu BS. Ten days of levofloxacin-containing concomitant therapy can achieve effective Helicobacter pylori eradication in patients with type 2 diabetes. Ann Med 2017; 49:479-486. [PMID: 28266875 DOI: 10.1080/07853890.2017.1294761] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND This study investigated whether levofloxacin-containing concomitant therapy can effectively eradicate Helicobacter pylori infection in patients with type 2 diabetes mellitus (T2DM). METHODS A total of 797 T2DM patients were screened for anti-H. pylori IgG antibodies, and the presence of H. pylori infection was confirmed by 13C-urea breath test. We prospectively randomized 114 of these patients to receive either 10 d of levofloxacin-concomitant therapy (n = 55) or sequential therapy (n = 59). Antimicrobial resistance of H. pylori isolates collected from the patients with T2DM (n = 109) and dyspeptic controls without DM (n = 110) was determined using the E-test. This study was approved by our Institutional Review Board (A-BR-103-021). RESULTS The H. pylori eradication rates with concomitant therapy were higher than sequential therapy in both intention-to-treat (96.4% versus 81.4%, p = 0.012) and per-protocol (100% versus 85.4%, p = 0.006) analysis. The adverse effects in both groups were similarly mild. In the patients who received sequential therapy, clarithromycin resistance was significantly associated with eradication failure (p = 0.02). There were no significant differences in the antibiotic-resistant rates to amoxicillin, clarithromycin, metronidazole, tetracycline, and levofloxacin between the patients with and without T2DM. CONCLUSIONS Ten days of levofloxacin-containing concomitant therapy is an effective and well-tolerated treatment to eradicate H. pylori infection for T2DM patients. Key messages Ten days of levofloxacin-containing concomitant therapy is well tolerated and superior to clarithromycin-containing sequential therapy for first-line H. pylori eradication in patients with type 2 diabetes. Clarithromycin resistance to H. pylori is the main factor associated with eradication failure in clarithromycin-containing sequential therapy in diabetic patients.
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Affiliation(s)
- Yao-Jong Yang
- a Departments of Pediatrics , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Chung-Tai Wu
- b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,c Departments of Internal Medicine , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Horng-Yih Ou
- b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,c Departments of Internal Medicine , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Chin-Han Lin
- b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,c Departments of Internal Medicine , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Hsiu-Chi Cheng
- b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,c Departments of Internal Medicine , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Wei-Lun Chang
- b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,c Departments of Internal Medicine , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Wei-Ying Chen
- b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,c Departments of Internal Medicine , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Hsiao-Bai Yang
- d Departments of Pathology , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,e Department of Pathology , Ton-Yen General Hospital , Hsin-Chu County , Taiwan
| | - Cheng-Chan Lu
- d Departments of Pathology , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan
| | - Bor-Shyang Sheu
- b Institutes of Clinical Medicine, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,c Departments of Internal Medicine , National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University , Tainan , Taiwan.,f Department of Internal Medicine , Tainan Hospital, Ministry of Health and Welfare , Tainan , Taiwan
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9
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Cheng HC, Tsai YC, Yang HB, Yeh YC, Chang WL, Kuo HY, Lu CC, Sheu BS. The corpus-predominant gastritis index can be an early and reversible marker to identify the gastric cancer risk of Helicobacter pylori-infected nonulcer dyspepsia. Helicobacter 2017; 22. [PMID: 28326664 DOI: 10.1111/hel.12385] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Corpus-predominant gastritis index (CGI) is an early histological marker to identify Helicobacter pylori-infected gastric cancer relatives at risk of cancer. This study validated whether CGI is more prevalent in H. pylori-infected nonulcer dyspepsia (NUD) subjects than in duodenal ulcer (DU) controls and whether it is reversible after H. pylori eradication or is correlated with noninvasive biomarkers. MATERIALS AND METHODS In this longitudinal cohort study, 573 H. pylori-infected subjects were enrolled, including 349 NUD and 224 DU. Gastric specimens were provided to assess CGI, spasmolyic polypeptide-expressing metaplasia (SPEM), and Operative Link on Gastric Intestinal Metaplasia assessment (OLGIM). Serum pepsinogen I and II levels were assessed using enzyme-linked immunosorbent assay. CGI subjected were followed up at least 1 year after H. pylori eradication. RESULTS NUD subjects had higher prevalence rates of CGI (47.0% vs 29.9%, P<.001) and OLGIM stages III-IV (24.1% vs 15.2%, P=.01) than controls. CGI was highly prevalent in NUD subjects after the age of 40, which was 10 years earlier than atrophic gastritis and intestinal metaplasia. NUD subjects with CGI had higher risk of SPEM (OR 2.86, P<.001) and lower serum pepsinogen I/II ratios (P<.001) than those without CGI. Serum pepsinogen I/II ratios <9 could predict CGI modestly (AUROC 0.69, 95% CI: 0.63-0.74). CGI was regressed after eradication (P<.001). CONCLUSIONS CGI was more prevalent in H. pylori-infected NUD subjects than in controls, was correlated with SPEM, and may serve as a marker earlier than OLGIM to indicate risk of gastric cancer. Moreover, CGI could be regressed after eradication.
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Affiliation(s)
- Hsiu-Chi Cheng
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yu-Ching Tsai
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Executive Yuan, Tainan, Taiwan
| | - Hsiao-Bai Yang
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Pathology, Ton Yen General Hospital, Hsinchu, Taiwan
| | - Yi-Chun Yeh
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Wei-Lun Chang
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsin-Yu Kuo
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Cheng-Chan Lu
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bor-Shyang Sheu
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, Tainan Hospital, Ministry of Health and Welfare, Executive Yuan, Tainan, Taiwan
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10
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Chang WL, Lin MY, Kuo HY, Yang HB, Cheng HC, Lu CC, Sheu BS. Osteopontin polymorphism increases gastric precancerous intestinal metaplasia susceptibility in Helicobacter pylori infected male. Future Oncol 2017; 13:1415-1425. [PMID: 28685609 DOI: 10.2217/fon-2017-0006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
AIM Whether genetic polymorphisms of osteopontin (OPN) coding gene, SPP1, determine the risk of gastric precancerous intestinal metaplasia (IM) in Helicobacter pylori infected patients. PATIENTS & METHODS Helicobacter pylori infected patients (100 with and 210 without IM) were recruited to evaluate the associations of SPP1 promoter polymorphisms with gastric IM and adjusted for age, sex and smoking. Gastric OPN expression and inflammation were evaluated by immunohistochemistry, and haemotoxylin and eosin stain. RESULTS Only in males, but not females, carriage of both GG genotype at rs11730059 and C-G-C haplotype at rs6833161-rs2853744-rs11730582 significantly increased the IM risk (OR: 4.92; 95% CI: 1.65-14.65; p = 0.004). Nearly 87.5% of males with IM carried risky genotype or haplotype. Carriers of the risky genotype or haplotype also had increased gastric OPN expression (p = 0.038) and inflammation (p = 0.007). CONCLUSION SPP1 polymorphisms predispose to IM development in H. pylori infected males.
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Affiliation(s)
- Wei-Lun Chang
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Meng-Ying Lin
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsin-Yu Kuo
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiao-Bai Yang
- Department of Pathology, Ton-Yen General Hospital, Hsin-Chu, Taiwan
| | - Hsiu-Chi Cheng
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Cheng-Chan Lu
- Department of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bor-Shyang Sheu
- Department of Internal Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Department of Internal Medicine, Tainan Hospital, Ministry of Health & Welfare, Tainan, Taiwan
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11
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Chen YL, Lee CT, Lu CC, Yang SC, Chen WL, Lee YC, Yang CH, Peng SL, Su WC, Chow NH, Ho CL. Epidermal Growth Factor Receptor Mutation and Anaplastic Lymphoma Kinase Gene Fusion: Detection in Malignant Pleural Effusion by RNA or PNA Analysis. PLoS One 2016; 11:e0158125. [PMID: 27352172 PMCID: PMC4924845 DOI: 10.1371/journal.pone.0158125] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 06/11/2016] [Indexed: 11/29/2022] Open
Abstract
Analyzing EGFR mutations and detecting ALK gene fusion are indispensable when planning to treat pulmonary adenocarcinoma. Malignant pleural effusion (MPE) is a devastating complication of lung cancer and sometimes the only source for mutation analysis. The percentage of tumor cells in the pleural effusion may be low; therefore, mutant enrichment is required for a successful analysis. The EGFR mutation status in MPE was determined using three methods: (1) PCR sequencing of genomic DNA (direct sequencing), (2) mutant-enriched PCR sequencing of genomic DNA using peptide nucleic acid (PNA-sequencing), and (3) PCR sequencing of cDNA after reverse transcription for cellular RNA (RNA-sequencing). RT-PCR was also used to test cases for ALK gene fusion. PNA-sequencing and RNA-sequencing had similar analytical sensitivities (< 1%), which indicates similar enrichment capabilities. The clinical sensitivity in 133 cases when detecting the common EGFR exon 19 and exon 21 mutations was 56.4% (75/133) for direct sequencing, 63.2% (84/133) for PNA-sequencing, and 65.4% (87/133) for RNA-sequencing. RT-PCR and sequencing showed 5 cases (3.8%) with ALK gene fusion. All had wild-type EGFR. For EGFR analysis of MPE, RNA-sequencing is at least as sensitive as PNA-sequencing but not limited to specific mutations. Detecting ALK fusion can be incorporated in the same RNA workflow. Therefore, RNA is a better source for comprehensive molecular diagnoses in MPE.
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Affiliation(s)
- Yi-Lin Chen
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- Department of Medical Laboratory Science and Biotechnology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Association of Medical Technologists, Tainan, Taiwan
| | - Chung-Ta Lee
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Cheng-Chan Lu
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Molecular Medical, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Association of Medical Technologists, Tainan, Taiwan
| | - Shu-Ching Yang
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Association of Medical Technologists, Tainan, Taiwan
| | - Wan-Li Chen
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Association of Medical Technologists, Tainan, Taiwan
| | - Yang-Cheng Lee
- Division of Hematology/Oncology, Department of Internal Medicine, Tainan Municipal Hospital, Tainan, Taiwan
| | | | - Shu-Ling Peng
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Wu-Chou Su
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Molecular Medical, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Nan-Haw Chow
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Molecular Medical, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Chung-Liang Ho
- Molecular Diagnostics Laboratory, Department of Pathology, National Cheng Kung University Hospital, Tainan, Taiwan
- Department of Medical Laboratory Science and Biotechnology, National Cheng Kung University Hospital, Tainan, Taiwan
- College of Medicine, Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- The Institute of Molecular Medical, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
- * E-mail:
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12
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Chang WL, Yang HB, Cheng HC, Yeh YC, Kao CY, Wu JJ, Lu CC, Sheu BS. Intracellular Osteopontin Induced by CagA-positive Helicobacter pylori Promotes Beta-catenin Accumulation and Interleukin-8 Secretion in Gastric Epithelial cells. Helicobacter 2015; 20:476-84. [PMID: 25735793 DOI: 10.1111/hel.12225] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Osteopontin, an important immune modulator and oncogenic promoter, is upregulated in H. pylori-infected gastric mucosa. However, the underlying mechanisms and biological significance are poorly understood. We investigated whether osteopontin was upregulated in gastric epithelial cells by H. pylori and the virulence factors involved. Moreover, cellular component changes caused by osteopontin were also investigated. MATERIALS AND METHODS The gastric epithelial cell line MKN45 was cocultured with wild-type and mutant H. pylori to analyze osteopontin expression. Beta-catenin levels in cell lysate and interleukin-8 levels in supernatant were analyzed. The difference in osteopontin expression levels in both gastric epithelium and plasma was compared between H. pylori-infected patients and uninfected controls. RESULTS H. pylori induced intracellular, but not secretory, osteopontin expression in MKN45 cells. Accordingly, osteopontin expression intensity in gastric epithelium was higher in H. pylori-infected patients than in controls, but osteopontin levels in plasma were similar between both patient groups. H. pylori virulence factor CagA delivered via the type IV secretion system was essential for intracellular osteopontin upregulation. H. pylori induced β-catenin accumulation and interleukin-8 secretion, whereas osteopontin knockdown completely abrogated these effects, in MKN45 cells. TLR2 antagonist abolished iOPN expression induced by H. pylori gastritis strain, but not by H. pylori cancer strain. CONCLUSIONS H. pylori is dependent on CagA translocation via the type IV secretion system to induce intracellular osteopontin expression in gastric epithelial cells. Upregulated intracellular osteopontin may promote gastric carcinogenesis via increased β-catenin accumulation and interleukin-8 secretion.
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Affiliation(s)
- Wei-Lun Chang
- Departments of Internal Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Hsiao-Bai Yang
- Department of Pathology, Ton-Yen General Hospital, Hsin-Chu, Taiwan
| | - Hsiu-Chi Cheng
- Departments of Internal Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Yi-Chun Yeh
- Departments of Internal Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Cheng-Yen Kao
- Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Jiunn-Jong Wu
- Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Cheng-Chan Lu
- Department of Pathology, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Bor-Shyang Sheu
- Departments of Internal Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan.,Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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13
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Yang CW, Chang CYY, Lai MT, Chang HW, Lu CC, Chen Y, Chen CM, Lee SC, Tsai PW, Yang SH, Lin CH, Sheu JJC, Tsai FJ. Genetic variations of MUC17 are associated with endometriosis development and related infertility. BMC Med Genet 2015; 16:60. [PMID: 26285705 PMCID: PMC4593232 DOI: 10.1186/s12881-015-0209-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 08/04/2015] [Indexed: 12/13/2022]
Abstract
BACKGROUND Genetic alterations of mucin genes, such as MUC2 and MUC4, were previously identified to be associated with endometriosis and related infertility. Additionally, gene expression profiling has confirmed MUC17 to be overexpressed in mucinous ovarian carcinoma; however, its associated risk for endometriosis remains unclear. This study was focused on the potential impact of genetic variations in MUC17 on endometriosis development and associated clinical features. METHODS The study subjects included 189 female Taiwanese patients with pathology-proven endometriosis and 191 healthy Taiwanese women as controls. Five single-nucleotide polymorphisms (rs4729645, rs10953316, rs74974199, rs4729655, and rs4729656) within the MUC17 gene were selected and genotyped using the Taqman genotyping assay to examine the allele frequency and genotype distributions of MUC17 polymorphisms. RESULTS Genotyping revealed that the A allele at rs10953316 in MUC17 was a protective genetic factor in endometriosis development (p = 0.008; OR = 0.53; 95% CI: 0.36-0.79). Genetic variation of rs4729655 protected patients against endometriosis-induced infertility, but was associated with a higher cancer antigen 125 (CA125) level. Base-pairing analysis, called MaxExpect, predicted an additional loop in the mRNA structure caused by rs10953316 polymorphism, possibly influencing ribosome sliding and translation efficiency. Such predictions were confirmed by immunohistochemistry that patients with AA genotype at rs10953316 showed low MUC17 levels in their endometrium, patients with GA genotype showed moderate levels, and strong staining could be found in patients with GG genotype. CONCLUSIONS MUC17 polymorphisms are involved in endometriosis development and the associated infertility in the Taiwanese population.
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Affiliation(s)
- Ching-Wen Yang
- The Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan. .,Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan.
| | - Cherry Yin-Yi Chang
- Department of Obstetrics and Gynecology, China Medical University, Taichung, Taiwan. .,Institute of Environmental Health, China Medical University, Taichung, Taiwan.
| | - Ming-Tsung Lai
- Department of Pathology, Taichung Hospital, Taichung, Taiwan.
| | - Hui-Wen Chang
- School of Medicine, China Medical University, Taichung, Taiwan.
| | - Cheng-Chan Lu
- The Institute of Basic Medical Sciences, National Cheng Kung University, Tainan, Taiwan. .,Department of Pathology, Medical College, National Cheng Kung University, Tainan, Taiwan.
| | - Yi Chen
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan.
| | - Chih-Mei Chen
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan.
| | - Shan-Chih Lee
- Collage of Medical Science and Technology, Chung Shan Medical University, Taichung, Taiwan.
| | - Pei-Wen Tsai
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan.
| | - Su-Han Yang
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan.
| | - Chih-Hung Lin
- Department of Pathology, Kaohsiung University Hospital, Kaohsiung, Taiwan.
| | - Jim Jinn-Chyuan Sheu
- Institute of Biomedical Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan. .,Human Genetic Center, China Medical University Hospital, Taichung, Taiwan. .,School of Chinese Medicine, China Medical University, Taichung, Taiwan. .,Department of Health and Nutrition Biotechnology, Asia University, Taichung, Taiwan.
| | - Fuu-Jen Tsai
- Human Genetic Center, China Medical University Hospital, Taichung, Taiwan. .,School of Post-Baccalaureate Chinese Medicine, China Medical University, Taichung, Taiwan.
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14
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Tsai YC, Hsiao WH, Lin SH, Yang HB, Cheng HC, Chang WL, Lu CC, Sheu BS. Genomic single nucleotide polymorphisms in the offspring of gastric cancer patients predispose to spasmolytic polypeptide-expressing metaplasia after H. pylori infection. J Biomed Sci 2015; 22:16. [PMID: 25884934 PMCID: PMC4340867 DOI: 10.1186/s12929-015-0121-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Accepted: 02/04/2015] [Indexed: 12/17/2022] Open
Abstract
Background Gastric cancer exhibits familial clustering, and gastric cancer familial relatives (GCF) tend to present with corpus-predominant gastritis and precancerous lesions as SPEM or IM after H. pylori infection. The study determined whether the children of gastric cancer patients (GCA) had genomic single nucleotide polymorphisms (SNPs) predisposed to the gastric precancerous lesions as spasmolytic polypeptide-expressing metaplasia (SPEM) or intestinal metaplasia (IM). Results There were 389 family relatives of 193 non-cardiac GCA and 173 duodenal ulcer patients (DU), received blood sampling for DNA collection. The differences of the risk alleles of SNPs in the ITGA5, ITGB1, IL-10, COX-2, RUNX3, and TFF2 genes were compared between 195 children of GCA and 143 DU. The children of GCA had higher allele frequencies of ITGA5-1160 T-carrier (P = 0.006, OR[95% CI] = 2.2[1.2-4]), ITGB1-1949 A-carrier (P = 0.047; OR[95% CI] = 2.8[1.4-5.3]), ITGB1 + 31804 C-carrier (P = 0.013; OR[95% CI] = 4.7[1.7-13.0]), IL-10-592 AA (P = 0.014; OR[95% CI] = 2.3[1.4-4.0]) and COX-2-1195 G-carrier (P = 0.019; OR[95% CI] = 1.7[0.9-3.2]) than DU. The combined genotype with ITGA5-1160/ITGB1-1949/ITGB1 + 31804 as T/A/C carriers and COX-2-1195/IL-10-592 as G-carrier/AA was more prevalent in the children of GCA than in DU (P < 1×10−4), and predisposed with a 5.3-fold risk of getting SPEM in the H. pylori-infected children of GCA (P = 0.016). Such risk of getting SPEM increased to 112 folds, if combined with RUNX3 + 492/TFF2-308 as A-carrier/CC in this limited study scale (P = 1×10−4). Conclusions The SNPs of ITGA5-1160/ITGB1-1949/ ITGB1 + 31804 as T/A/C carriers and COX-2-1195/IL-10-592 as G-carrier/AA, or more specific to combine RUNX3 + 492/TFF2-308 as A-carrier/CC shall be host factor predisposing to gastric cancer during H. pylori infection, and serve as marker to identify high-risk subjects for H. pylori eradication. Electronic supplementary material The online version of this article (doi:10.1186/s12929-015-0121-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yu-Ching Tsai
- Departments of Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Department of Internal Medicine, National Cheng Kung University Hospital, 138 Sheng Li Road, Tainan, 70428, Taiwan. .,Department of Internal Medicine, Tainan Hospital, Department of Health, Executive Yuan, Tainan, Taiwan.
| | - Wei-Hsin Hsiao
- Departments of Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| | - Sheng-Hsiang Lin
- Departments of Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| | - Hsiao-Bai Yang
- Departments of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Department of Pathology, Ton-Yen General Hospital, Hsin-Chu, Taiwan.
| | - Hsiu-Chi Cheng
- Departments of Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Department of Internal Medicine, National Cheng Kung University Hospital, 138 Sheng Li Road, Tainan, 70428, Taiwan.
| | - Wei-Lun Chang
- Departments of Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Department of Internal Medicine, National Cheng Kung University Hospital, 138 Sheng Li Road, Tainan, 70428, Taiwan.
| | - Cheng-Chan Lu
- Departments of Pathology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
| | - Bor-Shyang Sheu
- Departments of Institute of Clinical Medicine, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan. .,Department of Internal Medicine, National Cheng Kung University Hospital, 138 Sheng Li Road, Tainan, 70428, Taiwan.
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Liao SY, Lu CC, Chang T, Huang CF, Cheng CH, Chang LB. Gate length scaling effect on high-electron mobility transistors devices using AlGaN/GaN and AlInN/AlN/GaN heterostructures. J Nanosci Nanotechnol 2014; 14:6243-6246. [PMID: 25936096 DOI: 10.1166/jnn.2014.8726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Compared to AlGaN/GaN HEMT with 0.15 μm T-gate length, the AlInN/AlN/GaN one exhibits much higher current density and transconductance of 1558 mA/mm at Vd = 2 V and 330 mS/mm, respectively. The high extrinsic ft and fmax of 82 GHz and 70 GHz are extracted from AlInN/AlN/GaN HEMT. Besides, we find that the transconductance roll-off is significant in AlGaN/GaN, but largely improved in AlInN/AlN/GaN HEMT, suggesting that the high carrier density and lattice-matched epitaxial heterostructure is important to reach both large RF output power and high operation frequency, especially for an aggressively gate length scaling.
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Chen YL, Lu CC, Yang SC, Su WP, Lin YL, Chen WL, Huang W, Su WC, Chow NH, Ho CL. Verification of wild-type EGFR status in non-small cell lung carcinomas using a mutant-enriched PCR on selected cases. J Mol Diagn 2014; 16:486-494. [PMID: 25051378 DOI: 10.1016/j.jmoldx.2014.05.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Revised: 04/10/2014] [Accepted: 05/27/2014] [Indexed: 01/20/2023] Open
Abstract
EGFR genotyping is required for targeted therapy of lung adenocarcinoma. Because a false-negative result might prevent a patient from receiving appropriate targeted therapies, it is desirable to recheck equivocal results of EGFR genotyping. A cohort of 346 lung cancers was tested with a commercial kit for EGFR mutations; nine of the cases had upward real-time amplification curves at late cycles. They were also investigated using mutant-enriched PCR with peptide nucleic acid-locked nucleic acid (PNA-sequencing). Six of the nine equivocal cases harbored EGFR mutations. These cases likely had a small amount of mutant DNA near the detection limit of the commercial kit. Twenty nonequivocal, wild-type cases were reconfirmed using PNA-sequencing. We noticed a College of American Pathologists proficiency test material that showed a suspicious upward curve and eventually proved to have an H773_V774insPH in exon 20, for which a specific primer was not designed in the commercial kit. Further study using cloned DNA fragments showed that the upward curve most likely resulted from cross-reaction between similar, but nonidentical, sequences. It is desirable to keep the number of false-negative results as low as possible, but rechecking all wild-type cases is impractical. The late upward curves we observed helped identify suspicious cases for rechecking. A second method, such as PNA-sequencing, is recommended to verify wild-type cases.
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Affiliation(s)
- Yi-Lin Chen
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Associations of Medical Technologists, Tainan, Taiwan
| | - Cheng-Chan Lu
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; The Institute of Molecular Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Shu-Ching Yang
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Wen-Pin Su
- Department of Internal Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Ya-Lan Lin
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Wan-Li Chen
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Wenya Huang
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Wu-Chou Su
- Department of Internal Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Nan-Haw Chow
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; The Institute of Molecular Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan
| | - Chung-Liang Ho
- Molecular Diagnosis Laboratory, Department of Pathology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Department of Medical Laboratory Science and Biotechnology, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan; Molecular Medicine Core Laboratory, Research Center of Clinical Medicine, College of Medicine, National Cheng Kung University Hospital, Tainan, Taiwan.
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Yang YJ, Sheu BS, Yang HB, Lu CC, Chuang CC. Eradication of Helicobacter pylori increases childhood growth and serum acylated ghrelin levels. World J Gastroenterol 2012; 18:2674-81. [PMID: 22690077 PMCID: PMC3370005 DOI: 10.3748/wjg.v18.i21.2674] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 12/08/2011] [Accepted: 04/28/2012] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine whether Helicobacter pylori (H. pylori)-infected children have reduced body weight (BW) and height (BH) growth, and if H. pylori eradication may restore growth while improving serum acylated ghrelin.
METHODS: This longitudinal cohort study with one-year follow-up enrolled 1222 children aged 4 to 12 years old into an observation cohort (18 with and 318 without H. pylori) and intervention cohort (75 with and 811 without). The 7-d triple therapy was used for eradication in the intervention cohort. The net increases of BW and BH as well serum acylated ghrelin after one-year follow-up were compared between successful eradicated H. pylori-infected children and controls.
RESULTS: In the observation cohort, the H. pylori-infected children had lower z score of BW (-1.11 ± 0.47 vs 0.35 ± 0.69, P = 0.01) and body mass index (BMI) (0.06 ± 0.45 vs 0.44 ± 0.73, P = 0.02) at enrollment and lower net BW gain after one-year follow-up (3.3 ± 2.1 kg vs 4.5 ± 2.4 kg, P = 0.04) than the non-infected controls. In the intervention cohort, the H. pylori-infected children had lower z score of BMI (0.25 ± 1.09 vs 0.68 ± 0.87, P = 0.009) and serum acylated ghrelin levels (41.8 ± 35.6 pg/mL vs 83.6 ± 24.2 pg/mL, P < 0.001) than the non-infected controls. In addition to restoring decreased serum ghrelin levels (87.7 ± 38.0 pg/mL vs 44.2 ± 39.0 pg/mL, P < 0.001), the H. pylori-infected children with successful eradication had higher net gains (P < 0.05) and increase of z scores (P < 0.05) of both BW and BH as compared with non-infected controls after one-year follow-up.
CONCLUSION: H. pylori-infected children are associated with low serum acylated ghrelin and growth retardation. Successful eradication of H. pylori restores ghrelin levels and increases growth in children.
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Yang YJ, Chuang CC, Yang HB, Lu CC, Sheu BS. Lactobacillus acidophilus ameliorates H. pylori-induced gastric inflammation by inactivating the Smad7 and NFκB pathways. BMC Microbiol 2012; 12:38. [PMID: 22429929 PMCID: PMC3340303 DOI: 10.1186/1471-2180-12-38] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [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: 08/12/2011] [Accepted: 03/19/2012] [Indexed: 12/13/2022] Open
Abstract
Background H. pylori infection may trigger Smad7 and NFκB expression in the stomach, whereas probiotics promote gastrointestinal health and improve intestinal inflammation caused by pathogens. This study examines if probiotics can improve H. pylori-induced gastric inflammation by inactivating the Smad7 and NFκB pathways. Results Challenge with H. pylori increased IL-8 and TNF-α expressions but not TGF-β1 in MKN45 cells. The RNA levels of Smad7 in AGS cells increased after H. pylori infection in a dose-dependent manner. A higher dose (MOI 100) of L. acidophilus pre-treatment attenuated the H. pylori-induced IL-8 expressions, but not TGF-β1. Such anti-inflammatory effect was mediated via increased cytoplasmic IκBα and depletion of nuclear NFκB. L. acidophilus also inhibited H. pylori-induced Smad7 transcription by inactivating the Jak1 and Stat1 pathways, which might activate the TGF-β1/Smad pathway. L. acidophilus pre-treatment ameliorated IFN-γ-induced Smad7 translation level and subsequently reduced nuclear NF-κB production, as detected by western blotting. Conclusions H. pylori infection induces Smad7, NFκB, IL-8, and TNF-α production in vitro. Higher doses of L. acidophilus pre-treatment reduce H. pylori-induced inflammation through the inactivation of the Smad7 and NFκB pathways.
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Affiliation(s)
- Yao-Jong Yang
- Department of Pediatrics, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Na B, Huang Z, Wang Q, Qi Z, Tian Y, Lu CC, Yu J, Hanes MA, Kakar S, Huang EJ, Ou JHJ, Liu L, Yen TSB. Transgenic expression of entire hepatitis B virus in mice induces hepatocarcinogenesis independent of chronic liver injury. PLoS One 2011; 6:e26240. [PMID: 22022578 PMCID: PMC3192172 DOI: 10.1371/journal.pone.0026240] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Accepted: 09/22/2011] [Indexed: 12/12/2022] Open
Abstract
Hepatocellular carcinoma (HCC), the third leading cause of cancer deaths worldwide, is most commonly caused by chronic hepatitis B virus (HBV) infection. However, whether HBV plays any direct role in carcinogenesis, other than indirectly causing chronic liver injury by inciting the host immune response, remains unclear. We have established two independent transgenic mouse lines expressing the complete genome of a mutant HBV ("preS2 mutant") that is found at much higher frequencies in people with HCC than those without. The transgenic mice show evidence of stress in the endoplasmic reticulum (ER) and overexpression of cyclin D1 in hepatocytes. These mice do not show any evidence of chronic liver injury, but by 2 years of age a majority of the male mice develop hepatocellular neoplasms, including HCC. Unexpectedly, we also found a significant increase in hepatocarcinogenesis independent of necroinflammation in a transgenic line expressing the entire wildtype HBV. As in the mutant HBV mice, HCC was found only in aged--2-year-old--mice of the wildtype HBV line. The karyotype in all the three transgenic lines appears normal and none of the integration sites of the HBV transgene in the mice is near an oncogene or tumor suppressor gene. The significant increase of HCC incidence in all the three transgenic lines--expressing either mutant or wildtype HBV--therefore argues strongly that in absence of chronic necroinflammation, HBV can contribute directly to the development of HCC.
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Affiliation(s)
- Bing Na
- Pathology Service, Veterans Administration Medical Center, San Francisco, California, United States of America
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, California, United States of America
| | - Zhiming Huang
- Pathology Service, Veterans Administration Medical Center, San Francisco, California, United States of America
| | - Qian Wang
- Pathology Service, Veterans Administration Medical Center, San Francisco, California, United States of America
| | - Zhongxia Qi
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California, United States of America
| | - Yongjun Tian
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, California, United States of America
| | - Cheng-Chan Lu
- Department of Pathology, National Cheng Kung University College of Medicine, Tainan, Taiwan
| | - Jingwei Yu
- Department of Laboratory Medicine, University of California, San Francisco, San Francisco, California, United States of America
| | - Martha A. Hanes
- Department of Laboratory Animal Resources, University of Texas Health Science Center, San Antonio, Texas, United States of America
| | - Sanjay Kakar
- Pathology Service, Veterans Administration Medical Center, San Francisco, California, United States of America
- Department of Pathology, University of California, San Francisco, San Francisco, California, United States of America
| | - Eric J. Huang
- Pathology Service, Veterans Administration Medical Center, San Francisco, California, United States of America
- Department of Pathology, University of California, San Francisco, San Francisco, California, United States of America
| | - J.-H. James Ou
- Department of Molecular Microbiology and Immunology, University of Southern California, Los Angeles, California, United States of America
| | - Limin Liu
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, California, United States of America
| | - T. S. Benedict Yen
- Pathology Service, Veterans Administration Medical Center, San Francisco, California, United States of America
- Department of Pathology, University of California, San Francisco, San Francisco, California, United States of America
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Chen YL, Su IJ, Cheng HY, Chang KC, Lu CC, Chow NH, Ho CL, Huang W. BIOMED-2 protocols to detect clonal immunoglobulin and T-cell receptor gene rearrangements in B- and T-cell lymphomas in southern Taiwan. Leuk Lymphoma 2010; 51:650-5. [DOI: 10.3109/10428191003660631] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Chen WY, Chang WL, Tsai YC, Cheng HC, Lu CC, Sheu BS. Double-dosed pantoprazole accelerates the sustained symptomatic response in overweight and obese patients with reflux esophagitis in Los Angeles grades A and B. Am J Gastroenterol 2010; 105:1046-52. [PMID: 19904250 DOI: 10.1038/ajg.2009.632] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES Body mass index (BMI) in the range defined as overweight or obese adversely decreases the sustained symptomatic response (SSR) to proton pump inhibitors for patients with reflux esophagitis of Los Angeles grade A or B (RE-AB). We thus investigated whether double-dosed pantoprazole can accelerate SSR in such patients. METHODS A total of 200 overweight or obese patients with RE-AB were evenly randomized into a double-dosed group (receiving 8-week pantoprazole 40 mg twice daily) or a standard-dosed control group (receiving 8-week pantoprazole 40 mg per day and one blank tablet at night). In each patient, demographic factors and the genotype of S-mephenytoin 4'-hydroxylase (CYP2C19) were checked and defined as poor metabolizer (PM), or homologous extensive metabolizer (HomoEM), or heterologous extensive metabolizer (HeteroEM). The cumulative proportions of patients with SSR were compared during the 8-week period. RESULTS Both intention-to-treat and per-protocol analyses disclosed that the rates of SSR were higher in the double-dosed group than in the standard-dosed group from week 4 (P=0.005) until week 8 (P=0.01). While using standard-dosed pantoprazole, PMs had better rates of SSR during the 8-week period than both HomoEMs and HeteroEMs (P<0.05). By using double-dosed pantoprazole, the cumulative rates of SSR were improved as early as week 4 for both HomoEMs and HeteroEMs (P<0.005, log-rank test). CONCLUSIONS For RE-AB in overweight and obese patients, double-dosed pantoprazole effectively accelerates the SSR, especially for those with CYP2C19 genotypes as HeteroEM or HomoEM. Accordingly, it offers an earlier shift into on-demand pantoprazole for RE-AB patients with high BMI.
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Affiliation(s)
- Wei-Ying Chen
- Department of Internal Medicine, National Cheng Kung University Medical Center, Tainan, Taiwan
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Hung KH, Hung HW, Yang HB, Lu CC, Wu JJ, Sheu BS. Host single nucleotide polymorphisms of MMP-9 -1562/TIMP-1 372 have gender differences in the risk of gastric intestinal metaplasia after Helicobacter pylori infection. Helicobacter 2009; 14:580-7. [PMID: 19889076 DOI: 10.1111/j.1523-5378.2009.00717.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND Helicobacter pylori infection causes chronic gastric inflammation and intestinal metaplasia (IM), related with deregulation of Wnt pathway and over-expressions of COX-2, matrix metalloproteinase (MMP), and tissue inhibitors of matrix metalloproteinase (TIMP). We thus test the host genomic predispositions related to the risk of IM after H. pylori infection. METHODS We enrolled 296 H. pylori-infected patients to provide gastric biopsies for histology and genomic DNA for genotypes of single nucleotide polymorphisms (SNPs), including APC, COX-2, IL-1B, IL-1RN, IL-10, MMP-2, MMP-9, TIMP-1, and TIMP-2 determined by sequence specific oligonucleotide probe, sequence specific primers, restriction fragment length polymorphism, or real-time polymerase chain reaction. RESULTS There was no association between the presence of IM and SNPs in APC, COX-2, IL-1B, IL-1RN, IL-10, MMP-2, and TIMP-2. The risk of IM was increased up to 2.29-folds in males with TIMP-1 372 C, and 3.03-fold in females with T carrier (p < .05). The combination genotype of MMP-9 -1562/TIMP-1 372 as CC/C and CT/T in males had a 4.5-fold increased risk of IM, as compared to CC/T (p < .05). Females with such combination genotype as CC/T-carrier had a 3-fold risk of IM than males with CC/T (p < .05). In contrast, males' combination genotype as CC/C had a 3-fold risk of IM than females with CC/CC (p = .05). CONCLUSIONS The host MMP-9 -1562/TIMP-1 372 SNPs had gender differences in the risk of IM after H. pylori infection, and could possibly serve as a host factor to identify the risk group harboring gastric precancerous changes after H. pylori infection.
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Affiliation(s)
- Kuei-Hsiang Hung
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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Sheu BS, Chang WL, Cheng HC, Kao AW, Lu CC. Body mass index can determine the healing of reflux esophagitis with Los Angeles Grades C and D by esomeprazole. Am J Gastroenterol 2008; 103:2209-14. [PMID: 18702650 DOI: 10.1111/j.1572-0241.2008.01979.x] [Citation(s) in RCA: 29] [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] [Indexed: 12/11/2022]
Abstract
AIMS This study assessed the endoscopic healing rates of reflux esophagitis with Los Angeles grades C and D (RE-CD) using a 6-month esomeprazole and the demographic factors or genotypes of S-mephenytoin 4'-hydroxylase (CYP2C19) that correlated with the healing of RE-CD. METHODS One hundred thirteen patients with RE-CD received esomeprazole 40 mg daily for 6 months and completed serial follow-ups regarding healing by endoscopies at the 1st month and the 6th month, respectively. In each patient, demographic factors, including body mass index (BMI), and the CYP2C19 genotypes were checked. RESULTS The endoscopic healing rates of RE-CD were similar among patients with different genotypes of CYP2C19 at the 1st month and the 6th month, respectively (P > 0.05). A lower healing rate of RE-CD at the 1st month was independently related to a higher BMI > 25 kg/m(2), coffee drinking, and the presence of hiatus hernia (P < 0.05), but not with the CYP2C19 genotypes. A higher BMI > 25 kg/m(2) independently had a 2.32-fold decrease of the healing of RE-CD (P < 0.001), but a net decrease of BMI > 1.5 kg/m(2) independently had a 3.65-fold increase of the healing of RE-CD at the 6th month (P= 0.014). CONCLUSIONS Esomeprazole 40 mg daily can be effective for RE-CD patients with different CYP2C19 genotypes. BMI > 25 kg/m(2) is an independent risk factor to determine the healing of RE-CD by esomeprazole. Reducing BMI > 1.5 kg/m(2), especially for those with an initial BMI > 25 kg/m(2), could be promising to improve the healing of RE-CD by esomeprazole.
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Affiliation(s)
- Bor-Shyang Sheu
- Department of Internal Medicine, Medical College, National Cheng Kung University, Tainan, Taiwan
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Wu YT, Liao JD, Lin JI, Lu CC. Determination of the optimized conditions for coupling oligonucleotides with 16-mercaptohexadecanoic acid chemically adsorbed upon Au. Bioconjug Chem 2007; 18:1897-904. [PMID: 17970584 DOI: 10.1021/bc700217n] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A specific 5'-modified amino group oligonucleotide (Primer 1), 15-mers in length, is selectively coupled with the carboxyl terminated 16-mercaptohexadecanoic acid (MHDA) chemically adsorbed on Au and subsequently hybridized with Antisense Primer. The amide-coupling process is of significance to create an intermediate structure for the purpose of adding Primer 1, while the hybridization reaction is relevant to various diagnostic purposes to determine the presence in nucleic acids for a target sequence. In this work, the coupling setting was particularly emphasized by varying commonly used temperatures and pH values with a definite concentration of coupling agents (i.e., 10 mM). The recombination with analogous hybridization treatment was investigated using high resolution X-ray photoelectron spectroscopy and a 75 degrees grazing angle Fourier transform infrared spectrometer. On the basis of the spectroscopic studies, the optimized conditions for the coupling process that is also correlated with the molecular density of subsequent hybridization process on MHDA/Au have been proposed at 37 degrees C and a pH value of 4.5. Therefore, it is pertinent to intensify the joining of short-chain DNA strands by complementary base pairing in diagnostic applications such as the identification of single nucleotide polymorphisms.
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Affiliation(s)
- Yi-Te Wu
- Department of Materials Science and Engineering, Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan, Taiwan
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Wu DH, Guo Y, Lu CC, Suri J. Improvement to functional magnetic resonance imaging (fMRI) methods using non-rigid body image registration methods for correction in the presence of susceptibility artifact effects. Conf Proc IEEE Eng Med Biol Soc 2007; 2006:1018-20. [PMID: 17946015 DOI: 10.1109/iembs.2006.259943] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Subject head movement, during the experimental and/or clinical procedure is an inevitable part of the functional magnetic resonance imaging (fMRI) brain mapping methods despite the availability of a large variety of head fixation devices employed in these studies. Thus, image registration is an essential processing step in fMRI. This is due to the fact that there is inevitable movement during the course on an fMRI experiment. An additional challenge is the explicit geometrical deformations associated with MRI. It is known that orientational changes are problematic in MRI in the presence of susceptibility differences especially between bone-tissue and air-tissue interfaces. This paper presents two registration strategies for fMRI registration, one using rigid registration based on maximization of mutual information, and the second is non-rigid registration adapted from Thirion's demons algorithm to demonstrate the importance and impact on fMRI in regions of susceptibility and its dependence on the image registration methodology.
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Affiliation(s)
- Dee H Wu
- Department of Radiological Science, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
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Wu B, Lu NX, Xia YK, Gu AH, Lu CC, Wang W, Song L, Wang SL, Shen HB, Wang XR. A frequent Y chromosome b2/b3 subdeletion shows strong association with male infertility in Han-Chinese population. Hum Reprod 2007; 22:1107-13. [PMID: 17204527 DOI: 10.1093/humrep/del499] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Azoospermia factor c (AZFc) subdeletions were reported to be significant risk factors for spermatogenesis. In this study, we assessed the occurrence of classical AZF deletions and AZFc subdeletions and their impact on male infertility in a Han-Chinese population. METHODS This study analysed a population of 699 subjects, including 451 idiopathic infertile patients with a range of fertility disorders and 248 fertile controls, using a retrospective design. Deletions were identified by multiplex PCR. RESULTS The prevalence and phenotypes of the classical AZF deletions were similar to previous studies. Subdeletions of the AZFc region in patients showed similar overall frequencies in all sperm concentration categories of gr/gr (7.0%) and b2/b3 (8.9%). For controls, these subdeletions were also found with a prevalence of gr/gr (7.7%) and b2/b3 (3.2%). b1/b3 deletions were not found either in the patients or in the controls. CONCLUSION Our data showed a higher frequency of deletion events in this Han-Chinese population than in populations elsewhere in the world. The classical AZF deletions were the primary genetic factors for spermatogenic failure, while no significant association was found for AZFc subdeletions with sperm concentration. However, the b2/b3 subdeletion was significantly associated with idiopathic male infertility (odds ratio, 2.93; 95% confidence interval 1.34-6.39) (P = 0.005), indicating a potential impairment of male fertility.
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Affiliation(s)
- B Wu
- The Key Laboratory of Reproductive Medicine of Jiangsu Province, Institute of Toxicology, Nanjing Medical University School of Public Health, Nanjing, China
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Huang TJ, Lu CC, Tsai JC, Yao WJ, Lu X, Lai MD, Liu HS, Shiau AL. Novel Autoregulatory Function of Hepatitis B Virus M Protein on Surface Gene Expression. J Biol Chem 2005; 280:27742-54. [PMID: 15899887 DOI: 10.1074/jbc.m502209200] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [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: 12/28/2022] Open
Abstract
The hepatitis B virus surface gene consists of a single open reading frame divided into three coding regions: pre-S1, pre-S2, and S. By alternate translation at each of the three initiation codons, L, M, and S proteins can be synthesized. Studies have shown that M protein is not essential for viral replication, virion morphogenesis, or in vitro infectivity. In this study, we show that native M protein can regulate surface gene expression at the transcriptional level. The regulatory effect of M protein is mediated through the CCAAT box within the S promoter. Deletion mapping analysis indicated that the transactivating effect of M protein is mediated through amino acids 1-57 of M protein (the MHBs(au) domain), although its maximal transactivation activity coincides with that of the pre-S2 domain. This conclusion is supported by the fact that disruption of the putative V8 protease site at the pre-S2/S domain junction not only rendered M protein incapable of transactivating the S promoter but also inactivated its nuclear translocation potential. Immunoprecipitation and immunoblot experiments demonstrated that pre-S2 interacts with the three subunits of the CCAAT box-binding factor/nuclear factor Y, the cognate binding protein of the CCAAT box. These results demonstrate and define a novel regulatory role of M protein, which, under natural conditions, may undergo a proteolytic process to generate an MHBs(au) species that will be translocated inside the nucleus, where it will interact with the CCAAT box-binding factor to regulate surface gene expression. Because the CCAAT box is located at a fixed position within numerous promoters, these observations might provide a plausible explanation for hepatitis B virus-associated hepatocarcinogenesis.
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Affiliation(s)
- Tsurng-Juhn Huang
- Institute of Basic Medical Sciences, Medical College, National Cheng Kung University, Tainan, Taiwan
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Lu CC, Sheu BS, Chen TW, Yang HB, Hung KH, Kao AW, Chuang CH, Wu JJ. Host TNF-alpha-1031 and -863 promoter single nucleotide polymorphisms determine the risk of benign ulceration after H. pylori infection. Am J Gastroenterol 2005; 100:1274-82. [PMID: 15929757 DOI: 10.1111/j.1572-0241.2005.40852.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES This study tested whether host genotypes of the tumor necrosis factor-alpha (TNF-alpha) promoter single nucleotide polymorphism (SNP) could determine clinical and histological outcomes after Helicobacter pylori infection. METHODS A total of 524 dyspeptic patients, 424 with and 100 without H. pylori infection, were checked for TNF-alpha promoter SNP over the locus on -1031(T/C), -863(C/A), -857(C/T), -806(C/T), and -308(G/A) by sequence-specific oligonucleotide probe. Each patient received panendoscopy to take gastric biopsy to detect H. pylori infection and its related histology using the updated Sydney's system. Gastric TNF-alpha expressions were stained by immunohistochemistry. RESULTS In H. pylori-infected patients, -1031C or -863A carriers of TNF-alpha promoter had more severe gastric neutrophil infiltration and TNF-alpha gastric staining than individuals with -1031TT or -863CC genotype, respectively (p<0.05). The multivariate logistic regression verified both -1031C and -863A carriers were independent risk factors to have duodenal ulcers and gastric ulcer without IM in the H. pylori-infected hosts (p<0.05). As compared to -863CC and -1031TT genotype combinations, the ulcer risk after H. pylori infection was 2.46 (95% CI: 1.32-4.59, p<or=0.00001) for the carriers with either -1031C or -863A allele, and even elevated to 6.06 (95% CI: 3.57-10.21, p<or=0.00001) for the individuals harboring both -863A and -1031C alleles. For patients with gastric ulcer, the 863CC genotype had a higher rate to have intestinal metaplasia than -863A carrier (p<or=0.005). CONCLUSIONS TNF-alpha-1031 and -863 promoter SNP should be novel host factors to determine the gastric inflammation and risk of peptic ulceration upon H. pylori infection.
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Affiliation(s)
- Cheng-Chan Lu
- Department of Internal Medicine, Institute of Microbiology and Immunology and Institute of Basic Medicine, Medical College, National Cheng Kung University, Tainan, Taiwan
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Huang TJ, Lu CC, Tsai JC, Yao WJ, Lu X, Lai MD, Liu HS, Shiau AL. Novel autoregulatory function of hepatitis B virus M protein on surface gene expression. J Biol Chem 2005. [PMID: 15899887 DOI: 10.1074/jbc.m502209200.] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The hepatitis B virus surface gene consists of a single open reading frame divided into three coding regions: pre-S1, pre-S2, and S. By alternate translation at each of the three initiation codons, L, M, and S proteins can be synthesized. Studies have shown that M protein is not essential for viral replication, virion morphogenesis, or in vitro infectivity. In this study, we show that native M protein can regulate surface gene expression at the transcriptional level. The regulatory effect of M protein is mediated through the CCAAT box within the S promoter. Deletion mapping analysis indicated that the transactivating effect of M protein is mediated through amino acids 1-57 of M protein (the MHBs(au) domain), although its maximal transactivation activity coincides with that of the pre-S2 domain. This conclusion is supported by the fact that disruption of the putative V8 protease site at the pre-S2/S domain junction not only rendered M protein incapable of transactivating the S promoter but also inactivated its nuclear translocation potential. Immunoprecipitation and immunoblot experiments demonstrated that pre-S2 interacts with the three subunits of the CCAAT box-binding factor/nuclear factor Y, the cognate binding protein of the CCAAT box. These results demonstrate and define a novel regulatory role of M protein, which, under natural conditions, may undergo a proteolytic process to generate an MHBs(au) species that will be translocated inside the nucleus, where it will interact with the CCAAT box-binding factor to regulate surface gene expression. Because the CCAAT box is located at a fixed position within numerous promoters, these observations might provide a plausible explanation for hepatitis B virus-associated hepatocarcinogenesis.
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Affiliation(s)
- Tsurng-Juhn Huang
- Institute of Basic Medical Sciences, Medical College, National Cheng Kung University, Tainan, Taiwan
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Brandt CA, Lu CC, Nadkarni PM. Automating identification of adverse events related to abnormal lab results using standard vocabularies. AMIA Annu Symp Proc 2005; 2005:903. [PMID: 16779190 PMCID: PMC1560626] [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: 05/10/2023]
Abstract
Laboratory data need to be imported automatically into central Clinical Study Data Management Systems (CSDMSs), and abnormal laboratory data need to be linked to clinically related adverse events. This import of laboratory data can be automated through mapping to standard vocabularies with HL7/LOINC mapping to the metadata within a CSDMS. We have designed a system that uses the UMLS metathesaurus as a common source to map or link abnormal laboratory values to adverse event CTCAE coded terms and grades in the metadata of TrialDB, a generic CSDMS.
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Lu CC, Chen JC, Tsai ST, Jin YT, Tsai JC, Chan SH, Su IJ. Nasopharyngeal carcinoma-susceptibility locus is localized to a 132 kb segment containing HLA-A using high-resolution microsatellite mapping. Int J Cancer 2005; 115:742-6. [PMID: 15729690 DOI: 10.1002/ijc.20946] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Nasopharyngeal carcinoma (NPC) is an epithelial tumor uniquely prevalent in southern Chinese. HLA-A2 is associated with NPC. In a previous study, we showed that the genes associated with susceptibility to NPC are primarily located within the HLA-A locus in Taiwanese NPC patients. However, the pathogenic genes causing NPC susceptibility remain unknown. Here, 8 polymorphic microsatellite markers distributed over a 1 megabase region surrounding the HLA-A locus were subjected to genetic analysis for the NPC-susceptibility locus. Statistical studies of associated alleles detected on each microsatellite locus showed that the NPC- susceptibility genes are most likely located between the D6S510 and D6S211 markers within a 132 kb segment containing the HLA-A locus. These results undoubtedly would facilitate the further positional cloning of the NPC-susceptibility locus, which has been elusive for the past 30 years.
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Affiliation(s)
- Cheng-Chan Lu
- Department of Pathology, National Cheng Kung University, Tainan, Taiwan.
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32
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Lu CC, Robertson EJ, Brennan J. The mouse frizzled 8 receptor is expressed in anterior organizer tissues. Gene Expr Patterns 2004; 4:569-72. [PMID: 15261835 DOI: 10.1016/j.modgep.2004.02.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2003] [Revised: 02/05/2004] [Accepted: 02/06/2004] [Indexed: 11/16/2022]
Abstract
Wnt signaling has been shown to be important for axis formation in vertebrates. However, no Wnt ligand or receptor has been shown to be specifically expressed in all the organizer tissues in the mouse embryo. Here we report that the mouse frizzled 8 (mfz8) gene, a Wnt receptor, is expressed in the anterior visceral endoderm (AVE) and the anterior primitive streak, which have been shown to possess organizer activity. mFz8 is also expressed in the descendents of the anterior streak that comprise the anterior mesendoderm (AME) at midgastrulation, with subsequent expression in the anterior neurectoderm, which is specified and patterned by the AVE and AME. Thus, mfz8 is specifically expressed in the organizer tissues that establish the anterior-posterior axis in the mouse embryo.
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Affiliation(s)
- C C Lu
- Department of Molecular and Cellular Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA 02138, USA
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Abstract
The aim of this study was to investigate the pharmacokinetics of desflurane uptake into the brain and body by comparing desflurane concentrations in internal jugular-bulb blood (Jdes), arterial blood (Ades) and pulmonary arterial blood (PAdes) at a fixed inspired desflurane concentration. Thirteen patients (aged 42-72 years) undergoing coronary artery bypass grafting surgery were enrolled in this study. They were anaesthetised using a constant 5% inspired desflurane concentration (CIdes) during the first hour of anaesthesia. Under constant volume-controlled ventilation, CIdes and end-tidal desflurane (CEdes) were measured with an infrared analyser. The desflurane concentration in the blood was analysed using gas chromatography, and cardiac output was measured using an Opti-Q pulmonary artery catheter. It took 24 min for the Jdes to equilibrate with Ades. Both CIdes-CEdes and Ades-PAdes gradients persisted during the study period. There was no further uptake of desflurane into the brain after 24 min but there was near-constant uptake into the body.
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Affiliation(s)
- C C Lu
- Department of Anaesthesiology, Tri-Service General Hospital, Taipei, Taiwan
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Abstract
The aim of this study was to investigate the pharmacokinetics of sevoflurane uptake into the brain and body by comparing sevoflurane concentrations in internal jugular-bulb blood (Jsev), arterial blood (Asev) and pulmonary arterial blood (PAsev) over a fixed inspired sevoflurane concentration. Ten patients (aged 51-73 years), undergoing coronary artery bypass grafting surgery were enrolled in this study. They were anaesthetised using a constant 3.5% inspired sevoflurane concentration (CIsev) during the first hour of anaesthesia. During constant volume-controlled ventilation, we measured CIsev and end-tidal sevoflurane (CEsev) using infrared analysis. The sevoflurane concentration in the blood was analysed using gas chromatography, and cardiac output was measured using an Opti-Q pulmonary artery catheter. We found that it took 40 min for the brain concentration to equilibrate with arterial blood (Asev). Both CIsev-CEsev and Asev-PAsev gradients persisted during the study period. There was no further uptake of sevoflurane into the brain after 40 min; however, there was near-constant uptake into the body.
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Affiliation(s)
- C C Lu
- Department of Anaesthesiology, Tri-Service General Hospital/National Defense Medical Center, Room 8113, no. 161, Sec. 6, Minchuan E. Road, Taipei, Taiwan
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Lin YC, Lu CC, Shen CY, Lei HY, Guo YL, Su HJ. Roles of genotypes of beta2-adrenergic receptor in the relationship between eosinophil counts and lung function in Taiwanese adolescents. J Asthma 2003; 40:265-72. [PMID: 12807170 DOI: 10.1081/jas-120018323] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To examine the roles of genetic polymorphism of the beta2-adrenergic receptor (beta2AR) in the relationship between eosinophil (EOS) counts and eosinophil cationic protein (ECP) counts and lung function, we recruited a random sample from the 1996 nationwide survey of asthma prevalence in middle school children. A total of 149 subjects--42 asthmatic children, 38 asthmatics in remission (no reported attack for more than 12 months), and 69 nonasthmatics--completed a physical evaluation, pulmonary function test, and determination of EOS, ECP, and beta2AR genotypes at amino acids 16 and 27. Asthmatic children had higher EOS and ECP than did nonasthmatics. No association was found between asthma and beta2AR genotypes. Lung function was significantly and inversely correlated with EOS but not with ECP in asthmatic children. By genotype, an inverse correlation between lung function and EOS was found in asthmatic children with Arg16Arg or Gln27Glu. A nonsignificant but similar inverse correlation was found in asthmatic children with Arg16Gly or Gln27Gln. However, a nonsignificant but positive correlation was found in asthmatic children with Gly16Gly. In conclusion, we suggest that EOS is a better clinical indicator of airway inflammation than ECP when children are not having an asthma attack. The association between an increase of EOS and lower lung function can be differentiated by beta2AR genotypes at amino acid 16.
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Affiliation(s)
- Ying-Chu Lin
- Graduate Institute of Environmental and Occupational Health, National Cheng Kung University, College of Medicine, Tainan, Taiwan
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Abstract
NPC is an epithelial tumor that is highly prevalent among the southern Chinese. Numerous studies have indicated that specific HLA haplotypes and genes within the HLA complex are associated with NPC. As a first effort to localize the gene responsible for susceptibility, the HLA-A, -B, and -A2 subtypes were examined for their association to NPC. Consistent with previous reports, frequencies of HLA-A2 [OR = 2.50, pc = 0.020 (study population); OR = 3.73, pc = 0.0030 (> or =40 years old)] were significantly higher in patients with NPC than in healthy controls. Two-locus analysis indicated that A2(+)B46(+) individuals are at greater risk for NPC than A2(-)B46(-) individuals in both the population studied and the > or =40-year-old group. This, however, may be due to the close linkage of these 2 genes. Moreover, A2(+)B38(+) individuals were at higher risk than A2(-)B38(-) individuals in both the population studied and the > or =40-year-old group; A2 and B38 are not genetically linked. These findings suggest that B38 or B46 alone cannot confer a high risk of NPC but that, in conjunction with A2, B38 or B46 positivity greatly increases risk. None of 5 A2 subtypes identified from studied populations was significantly associated with NPC. Microsatellite marker D6S211, located 97 kb telomeric to HLA-A, was analyzed for its association with NPC. Allele 4 of D6S211 was significantly associated with NPC (OR = 3.97, pc = 0.0042). These results strongly support the hypothesis that genes associated with susceptibility to NPC in the HLA region are within the HLA-A locus.
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Affiliation(s)
- Cheng-Chan Lu
- Department of Pathology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, Republic of China
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Abstract
The authors describe a 5-year-old boy with beta-thalassemia major who received bone marrow transplantation (BMT) from a human leukocyte antigen (HLA)-matched unrelated donor. The conditioning regimen consisted of 16 mg/kg busulfan and 200 mg/kg cyclophosphamide. The transplantation was complicated with grade II graft-versus-host disease, although prophylaxis with cyclosporine and short-term methotrexate was carried out. Cytomegalovirus disease occurred at 2 months after transplantation but was controlled successfully. The child remains disease-free and in good clinical condition 53 months after BMT. The authors suggest that BMT from an HLA-matched unrelated donor could be considered as an alternative treatment in patients with beta-thalassemia major when no HLA-matched donor is available.
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Affiliation(s)
- Chao-Neng Cheng
- Department of Pediatrics, National Cheng Kung University Hospital, Tainan, Taiwan
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38
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Abstract
BACKGROUND Human leukocyte antigen (HLA) DR genes and the tumor necrosis factor (TNF) gene locus are associated with asthma and IgE production. TNFalpha-308G/A frequencies between Japanese and Caucasians in the UK have been found to be different. The roles of HLA-DRB1 and TNF genotypes are unknown in Taiwanese adolescents with IgE-mediated asthma (I-asthma). METHODS From the population of a 1996 nation-wide survey, we recruited a random sample for a physical examination, determination of total serum IgE (sIgE), dust-mite-specific IgE, and HLA-DRB1, TNFalpha-308, and LTalphaNcoI polymorphisms by polymerase chain reaction. RESULTS A total of 80 I-asthmatics and 69 non-asthmatics completed the study. We suggested that I-asthmatics had a higher frequency of the DR13 gene (OR = 8.6, 95% CI = [1.6-161]). The DR13 gene was associated with high sIgE and high dust-mite-specific IgE, especially Dermatophagoides farinae. No TNF haplotype or genotype was associated with I-asthma. The DR13 gene was linked to the LTalphaNcoI*1 allele. When sIgE was adjusted by multiple logistic regression, the risk of I-asthma was much higher for the DR13(+)/LTalphaNcoI*1 haplotype (OR = 25.6, 95% CI = [2.2-1378]) than for the others. CONCLUSIONS In Taiwanese children sensitized to Der f, the DR13(+)/LTalphaNcoI*1 haplotype was associated with a much higher risk of having clinical asthma than any other DR13/LTalphaNcoI haplotype.
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Affiliation(s)
- Ying-Chu Lin
- Department of Environmental and Occupational Health, National Cheng Kung University, Tainan, Taiwan
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Lu CC, Chen CC, Hsia CY, Chiang JH, Tsay SH, Han HF, Chang FY, Lee SD. A progressive growing inflammatory pseudotumor of the liver. Zhonghua Yi Xue Za Zhi (Taipei) 2001; 64:725-30. [PMID: 11922494] [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: 02/24/2023]
Abstract
Inflammatory pseudotumors of the liver are very rare, and their etiology and pathogenesis remain unclear. The diagnosis is often difficult to make because these masses often mimic other lesions such as primary neoplasms, metastases or liver abscesses. Herein, we report a rare case of progressive growing hepatic pseudotumor in a 47-year-old man. The patient presented with body weight loss and general malaise. A series of radiological examinations showed the progressive growth of the hepatic tumor from 3.5 cm to 10.0 cm in diameter within 8 months. He underwent a right lobectomy of the liver, and the final diagnosis was proven by pathology. There were no complications in the post-operative course.
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Affiliation(s)
- C C Lu
- Department of Medicine, Cardinal Tien Hospital, Taipei, Taiwan, ROC
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40
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Abstract
Syntactic priming of Chinese nouns and verbs was investigated in word recognition (cued shadowing of auditory targets) and production (picture naming). Disyllabic compound words were presented after syntactically congruent, incongruent, or neutral auditory contexts, with a zero delay between offset of the context and onset of the target. Significant priming was observed in both tasks, including facilitation as well as inhibition. Post hoc analyses showed that reaction times were also affected by sublexical variables that are especially relevant for Chinese, including syllable density (number of word types and tokens in the language with the same first or second syllable) and semantic transparency (whether the meaning of the whole word is predictable from the separate meanings of the two syllables within the compound). These patterns suggest competitive effects at the sublexical level. Implications for interactive models of lexical access are discussed.
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Affiliation(s)
- C C Lu
- National Hsinchu Teachers College, Taiwan
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41
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Chen JH, Chen CC, Tzeng LM, Tsay SH, Chiang JH, Lu CC, Chang FY, Lee SD. Resection of triple synchronous tumors--gastric adenocarcinoma, gallbladder adenocarcinoma and stromal tumor of the stomach. Zhonghua Yi Xue Za Zhi (Taipei) 2001; 64:655-60. [PMID: 11853221] [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
We herein report a rare case of triple synchronous tumors: gastric adenocarcinoma, gallbladder adenocarcinoma and stromal cell tumor of stomach, which were resected in the same operation. A 72-year-old male patient suffered from poor appetite and epigastric pain that radiated to his back for one month. Upper gastrointestinal endoscopy showed a gastric ulcer measuring 1.5 cm at the prepyloric area, which was proven to be adenocarcinoma by biopsy. A second tumor was found in the gallbladder, measuring 3 cm, by ultrasonography. On computed tomography, a third tumor about 2.5 cm in size was recognized posterior to the gastric high body and anterior to the pancreas. Given the presence of three tumors, he underwent a radical subtotal gastrectomy with Billroth-II gastrojejunostomy and simultaneous cholecystectomy. Pathological findings revealed gastric adenocarcinoma, gallbladder adenocarcinoma and stromal cell tumor of the stomach. The postoperative course was smooth.
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Affiliation(s)
- J H Chen
- Department of Medicine, Taipei Veterans General Hospital, Taiwan, ROC
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Abstract
Although much remains unknown about how the embryonic axis is laid down in the mouse, it is now clear that reciprocal interactions between the extraembryonic and embryonic lineages establish and reinforce patterning of the embryo. At early post-implantation stages, the extraembryonic ectoderm appears to impart proximal-posterior identity to the adjacent proximal epiblast, whereas the distal visceral endoderm signals to the underlying epiblast to restrict posterior identity as it moves anteriorward. At gastrulation, the visceral endoderm is necessary for specifying anterior primitive streak derivatives, which, in turn, pattern the anterior epiblast. Polarity of these extraembryonic tissues can be traced back to the blastocyst stage, where asymmetry has been linked to the point of sperm entry at fertilization.
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Affiliation(s)
- C C Lu
- 16 Divinity Avenue, Department of Molecular and Cellular Biology, Harvard University, 02138, Cambridge, Massachusetts, USA.
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Abstract
Shortly after implantation the mouse embryo comprises three tissue layers. The founder tissue of the embryo proper, the epiblast, forms a radially symmetric cup of epithelial cells that grows in close apposition to the extra-embryonic ectoderm and the visceral endoderm. This simple cylindrical structure exhibits a distinct molecular pattern along its proximal-distal axis. The anterior-posterior axis of the embryo is positioned later by coordinated cell movements that rotate the pre-existing proximal-distal axis. The transforming growth factor-beta family member Nodal is known to be required for formation of the anterior-posterior axis. Here we show that signals from the epiblast are responsible for the initiation of proximal-distal polarity. Nodal acts to promote posterior cell fates in the epiblast and to maintain molecular pattern in the adjacent extra-embryonic ectoderm. Both of these functions are independent of Smad2. Moreover, Nodal signals from the epiblast also pattern the visceral endoderm by activating the Smad2-dependent pathway required for specification of anterior identity in overlying epiblast cells. Our experiments show that proximal-distal and subsequent anterior-posterior polarity of the pregastrulation embryo result from reciprocal cell-cell interactions between the epiblast and the two extra-embryonic tissues.
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Affiliation(s)
- J Brennan
- Department of Molecular and Cellular Biology, Harvard University, 16 Divinity Avenue, Cambridge, Massachusetts 02138, USA
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Chu CH, Lee JK, Lam HC, Lu CC. Prognostic factors of hyperglycemic hyperosmolar nonketotic state. Chang Gung Med J 2001; 24:345-51. [PMID: 11512365] [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: 02/21/2023]
Abstract
BACKGROUND To delineate the prognostic factors of patients suffering from hyperglycemic hyperosmolar nonketotic state (HHNK) in Taiwan. METHODS We reviewed the charts of patients who had been admitted to the Division of Endocrinology and Metabolism of Kaohsiung Veterans General Hospital from 1992 to 1998 due to HHNK. General and clinical data were collected. The influential factors for prognosis were determined. RESULTS One hundred and nineteen patients fulfilling the criteria of HHNK were included in our study. The mean age was 67.8 +/- 11.7 years with male predominance. Twenty-nine patients died which produced a fatality rate of 24.4%. Eighty-six (72.3%) cases occurred in patients with known diabetic history, while another thirty-three (27.7%) occurred in patients with no diabetic history. Most patients received oral antidiabetic drugs before HHNK episodes. The patients who died had shorter length of inpatient stay than did survivors. The leading precipitating factor was infection (57.1%), followed by poor compliance of medication (21.0%) and undiagnosed diabetes (10.9%). Fifty patients (42%) had a history of stroke. The risk factors for death included precipitation of HHNK by infection and low Glasgow coma scale (GCS) on admission. Old age itself did not contribute to death. Severity of hyperglycemia or hyperosmolarity was also not an important prognostic factor. Multiple logistic regression revealed that low GCS on admission was the most influential factor of leading to death. Most of the patients who died did so due to underlying precipitating factors. CONCLUSIONS Neither age nor osmolarity, but underlying precipitating factors and state of consciousness were the most influential factors affecting the prognosis of HHNK.
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Affiliation(s)
- C H Chu
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
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Fan YF, Lu CC, Chen WC, Yao WJ, Wang HC, Chang TT, Lei HY, Shiau AL, Su IJ. Prevalence and significance of hepatitis B virus (HBV) pre-S mutants in serum and liver at different replicative stages of chronic HBV infection. Hepatology 2001; 33:277-86. [PMID: 11124846 DOI: 10.1053/jhep.2001.21163] [Citation(s) in RCA: 155] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Several types of naturally occurring pre-S mutants in sera or liver tissues in patients with chronic hepatitis B virus (HBV) infection have been identified. To clarify the prevalence and significance of emergence of pre-S mutants, 140 sera and 18 resected livers from patients with HBV were studied. Replicative status was designated as high, intermediate, and low based on the HBV-DNA levels in serum or the expression of HBV antigens in liver. In vitro transfection and Western blot analysis were performed to characterize expression and secretion of HBsAg by the mutant constructs. Five major types (I to V) of pre-S deletion mutants in serum and liver and 2 types (VI and VII) in liver were identified. Pre-S mutant was 6.4% at high replicative phase, 13% at intermediate, and 37.5% at low or nonreplicative phases in serum. In livers, the same tendency existed: pre-S2 deletion mutants emerged and prevailed at a low replicative phase in hepatocytes that expressed a novel marginal pattern of HBsAg and usually clustered in groups. The deletion sequence of pre-S2 region coincides with human leukocyte antigen-restricted T- and B-cell epitopes. In vitro HBsAg was retained in the hepatocytes and synthesis and secretion of major surface antigen decreased for most of the pre-S mutants. Pre-S mutants prevailed with evolution of chronic HBV, probably under immune pressure. Emergence of pre-S mutants may account for the life-long persistence and discrepancy of HBsAg in serum and liver in HBV and may confer growth advantage in view of the clustering proliferation of hepatocytes harboring pre-S2 mutant.
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Affiliation(s)
- Y F Fan
- Graduate Institutes of Basic Medicine and Microbiology, National Cheng Kung University College of Medicine, Tainan, Taiwan
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Blackhart BD, Ruslim-Litrus L, Lu CC, Alves VL, Teng W, Scarborough RM, Reynolds EE, Oksenberg D. Extracellular mutations of protease-activated receptor-1 result in differential activation by thrombin and thrombin receptor agonist peptide. Mol Pharmacol 2000; 58:1178-87. [PMID: 11093752 DOI: 10.1124/mol.58.6.1178] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.4] [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: 12/12/2022] Open
Abstract
The protease-activated thrombin receptor-1 (PAR-1) can be activated by both the tethered ligand exposed by thrombin cleavage and a synthetic peptide having the tethered ligand sequence (thrombin receptor agonist peptide or TRAP). We conducted a mutational analysis of extracellular residues of the receptor potentially involved in interaction with both the tethered ligand and the soluble peptide agonist. Agonist-stimulated calcium efflux in X. laevis oocytes or inositol phosphate accumulation in COS-7 cells was used to assess receptor activation. We have also examined the binding of a radiolabeled TRAP for the wild-type and mutant PAR-1 receptors. Our results indicated that most of the mutations strongly affected TRAP-induced responses without significantly altering thrombin-induced responses or TRAP binding. Several point mutations and deletion of extracellular domains (DeltaEC3, DeltaNH3) drastically altered the ability of mutant receptors to respond to TRAP, but not to thrombin, and did not affect the affinity for the radiolabeled TRAP by these mutant receptors. Only mutations that disrupted the putative disulfide bond or substitution of multiple acidic residues in the second extracellular loop by alanine had a significant effect on both ligand binding and thrombin activation. These results suggest that although both agonists can activate PAR-1, there are profound differences in the ability of thrombin and TRAP to activate PAR-1. In addition, we have found PAR-1 mutants with the ability to dissociate receptor-specific binding from functional activity.
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Affiliation(s)
- B D Blackhart
- COR Therapeutics, Inc., South San Francisco, California 94080, USA
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47
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Abstract
We investigated whether various periods of pregnancy might disturb rat gastrointestinal motility. When the proestrus of female rats occurred, they were housed with male rats. Motility studies were conducted on day 7 (first period), day 14 (second) and day 21 (third) of pregnancy, respectively. After the orogastric feeding of radiochromium marker, rats were sacrificed 15 min later. Gastric emptyings of pregnant rats measured at various periods did not differ from the nonpregnant diestrus controls. The geometric center represented intestinal transits in the first, second and third periods of pregnancy and controls were (mean+/-SEM) 4.54+/-0.25, 4.47+/-0.17, 3.61+/-0.27 and 4.98+/-0.13, respectively (p < 0.01) while their plasma progesterone levels were 15.6+/-2.6, 18+/-1.4, 7.1+/-0.5 and 8.6+/-0.4 ng/ml, respectively (p< 0.01). This shows that late pregnancy inhibits small intestinal transit, whereas gastric emptying remains unchanged. Altered progesterone during pregnancy is not a main mediator to disturb intestinal transit.
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Affiliation(s)
- F Y Chang
- Division of Gastroenterology, Veterans General Hospital-Taipei, Taiwan/ROC
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48
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Abstract
We have established a QCM immunoassay system which allows on-line and quantitative monitoring throughout the entire detection procedure and provides information on the surface coverage and the binding ratio of antibody to antigen. Compared to conventional immunoassay systems the QCM system offers advantages of short response times, obviates the need for additive labeling reagents, and permits direct conversion of a frequency signal into mass accumulation.
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Affiliation(s)
- S Lin
- Centre for Optoelectronic Biomedicine, National Taiwan University College of Medicine, Taipei, Taiwan
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49
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Fan YF, Lu CC, Chang YC, Chang TT, Lin PW, Lei HY, Su IJ. Identification of a pre-S2 mutant in hepatocytes expressing a novel marginal pattern of surface antigen in advanced diseases of chronic hepatitis B virus infection. J Gastroenterol Hepatol 2000; 15:519-28. [PMID: 10847439 DOI: 10.1046/j.1440-1746.2000.02187.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND AND AIMS The expression of hepatitis B viral (HBV) antigens in liver tissue reflects the replicative status of chronic HBV infection. We have previously recognized a novel marginal pattern of hepatitis B surface antigen (HBsAg) in hepatocytes, which usually clusters in groups and emerges at the late non-replicative phase. This study was designed to investigate whether the marginal-type HBsAg represented the gene product of a specific HBV-surface mutant. METHODS Microdissection of cirrhotic nodules homogeneously expressing marginal HBsAg was performed on two of 12 resected livers from HBsAg-seropositive patients with hepatocellular carcinoma. The gene presumably encoding marginal HBsAg was polymerase chain reaction (PCR)-cloned, sequenced and analysed. In vitro transfection and expression of the cloned surface mutant plasmids were performed on the Huh7 cell line to illustrate intrahepatic HBsAg expression. RESULTS Immunohistochemical staining revealed that the marginal HBsAg was positive for pre-S1 and thus contained large surface proteins. The PCR cloning and sequencing of the genes presumably encoding marginal-type HBsAg in both cases revealed the same deletion at the 5' terminus (nt 2-55) of pre-S2. A point mutation on the small-surface (S) antigen was also found in one case. The pre-S2 deletion sequence and the mutation sites of the S gene coincide with human lymphocyte antigen-restricted T- and/or B-cell epitopes. In vitro transfection of the mutant plasmid revealed a blot-like retention or accumulation of HBsAg in the cytoplasm or at the periphery of hepatocytes, accompanied by a decreased secretion of HBsAg in the culture supernatant, mimicking intrahepatic expression. CONCLUSION A natural pre-S2 deletion mutant was identified in hepatocytes expressing a novel marginal pattern of HBsAg, which probably contains mutant, large, surface proteins. The biological significance of the pre-S2 deletion mutant should be interesting in view of the clustering proliferation of hepatocytes expressing marginal HBsAg.
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Affiliation(s)
- Y F Fan
- Institute of Basic Medicine, College of Medicine, National Cheng Kung University, Tainan, Taiwan
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50
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Womack KB, Gordon SE, He F, Wensel TG, Lu CC, Hilgemann DW. Do phosphatidylinositides modulate vertebrate phototransduction? J Neurosci 2000; 20:2792-9. [PMID: 10751430 PMCID: PMC6772201] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Mammalian rod cyclic nucleotide gated (CNG) channels (i.e., alpha plus beta subunits) are strongly inhibited by phosphatidylinositol 4, 5-bisphosphate (PIP(2)) when they are expressed in Xenopus oocytes and studied in giant membrane patches. Cytoplasmic Mg-ATP inhibits CNG currents similarly, and monoclonal antibodies to PIP(2) reverse the effect and hyperactivate currents. When alpha subunits are expressed alone, PIP(2) inhibition is less strong; olfactory CNG channels are not inhibited. In giant patches from rod outer segments, inhibition by PIP(2) is intermediate. Other anionic lipids (e.g., phosphatidyl serine and phosphatidic acid), a phosphatidylinositol-specific phospholipase C, and full-length diacylglycerol have stimulatory effects. Although ATP also potently inhibits cGMP-activated currents in rod patches, the following findings indicate that ATP is used to transphosphorylate GMP, generated from cGMP, to GTP. First, a phosphodiesterase (PDE) inhibitor, Zaprinast, blocks inhibition by ATP. Second, inhibition can be rapidly reversed by exogenous regulator of G-protein signaling 9, suggesting G-protein activation by ATP. Third, the reversal of ATP effects is greatly slowed when cyclic inosine 5'-monophosphate is used to activate currents, as expected for slow inosine 5' triphosphate hydrolysis by G-proteins. Still, other results remain suggestive of regulatory roles for PIP(2). First, the cGMP concentration producing half-maximal CNG channel activity (K(1/2)) is decreased by PIP(2) antibody in the presence of PDE inhibitors. Second, the activation of PDE activity by several nucleotides, monitored electrophysiologically and biochemically, is reversed by PIP(2) antibody. Third, exogenous PIP(2) can enhance PDE activation by nucleotides.
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Affiliation(s)
- K B Womack
- Department of Physiology, University of Texas Southwestern Medical Center at Dallas, Dallas, Texas 75235-9040, USA
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