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Mohamed AK, Tang YC. Demographics and characteristics of endoscopic findings among COVID-19 patients with upper gastrointestinal bleeding in a single centre. Med J Malaysia 2023; 78:893-896. [PMID: 38159924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
INTRODUCTION Novel coronavirus 19 disease (COVID-19) pandemic poses healthcare providers challenges in the endoscopic suite. It is unclear whether it affects the endoscopic manifestations of upper gastrointestinal (GI) bleeding. This retrospective study was done to review demographic data, site of lesions and need of interventions for those lesions. MATERIALS AND METHODS Oesophagoduodenoscopy (OGDS) reports of COVID-19 patients with indication of upper GI bleeding from March 2021 to April 2022 were reviewed. Data of 35 patients were then analysed. RESULTS Of the 35 patients, 8.6% (n = 3) were female and 91.4% (n = 32) were males. A total of 31.4% (n = 11) were below 50 years and 68.6% (n = 24) were 50 and above. 34.3% (n = 12) with lesions requiring endoscopic intervention, 34.3% (n = 12) with lesions not requiring endoscopic intervention, 31.4% (n = 11) has no significant stigmata of recent haemorrhage. Among subgroup requiring endoscopic intervention, 50% (n = 6) are non-variceal bleeding (NVUIB), and 50% (n = 6) are variceal bleeding (VUGIB). Among NVUGIB, 16.7% (n = 1) is gastric and duodenal angiodysplasia requiring argon plasma coagulation, 50% (n = 3) are duodenal F2A ulcer requiring thermoablation, 16.7% (n = 1) is gastric F2A ulcer requiring hemoclip, and 16.6% (n = 1) is Cameron's ulcer requiring hemoclip. Among VUGIB, 100% (n = 6) are oesophageal varices requiring endoscopic variceal banding (EVL). CONCLUSIONS Lower proportion of NVUGIB among COVID-19 patients raises hypothesis on whether prothrombotic state of COVID-19 is a protective factor of NVUGIB. Studies with larger sample size are needed to establish significance.
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Affiliation(s)
- A K Mohamed
- Hospital Sultanah Nora Ismail, Department of Medicine, Batu Pahat, Johor, Malaysia.
| | - Y C Tang
- Hospital Selayang, Department of Gastroenterology and Hepatology, Selangor, Malaysia
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Yang FY, Liu JM, Lyu Q, Wang G, Tang YC, Du SY, Gao X, Liang GB. [Effect analysis of treating intracranial wide-neck bifurcation aneurysms through Woven EndoBridge]. Zhonghua Wai Ke Za Zhi 2022; 60:831-837. [PMID: 36058709 DOI: 10.3760/cma.j.cn112139-20220531-00246] [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: 06/15/2023]
Abstract
Objective: To explore the clinical effect of Woven EndoBridge (WEB) in the treatment of wide-neck bifurcation aneurysms. Methods: The clinical and imaging data of 11 patients with intracranial wide-neck bifurcation aneurysms treated by WEB alone at Department of Neurosurgery of the Northern Theater General Hospital from September 2017 to May 2018, were retrospectively analyzed. The patients were 7 males and 4 females, aged (54±11) years (ranged from 31 to 66 years). The aneurysms of 5 patients were located in the anterior communicating artery, 3 in the top of the basilar artery, and 3 in the bifurcation of the middle cerebral artery. The intraoperative and postoperative conditions of the patients were recorded, and the degree of aneurysm embolization was evaluated by WEB embolization aneurysm occlusion scale (WOS). Results: The intraoperative WEB release of all the 11 patients was good, with 3 cases of WOS grade A, 1 of grade B and 7 of grade C, with no intraoperative acute complications occurring. The imaging follow-up was not carried out in 1 patient due to economic reason, and the clinical follow-up was good until 3 years after the operation; 10 patients were followed up by imaging for 6 months to 3 years, and no postoperative complications occurred in the target treatment area. Among the 2 patients with WOS grade A and 1 patient with grade B during operation, according to the postoperative follow-up, all were WOS grade A; among the 7 patients with WOS grade C during operation, 4 were still of grade C and 3 were of grade D according to the follow-up. Among the 3 patients with WOS grade D, 1 patient received secondary embolization due to poor recurrence morphology, unstable hemodynamics and high possibility of rupture of aneurysm, stent assisted coil embolization was adopted, with good immediate effect; the other 2 cases had recurrent aneurysms, but the aneurysms had good morphology and stable hemodynamics, therefore, clinical follow-up was continued and no secondary surgery was performed. No complications occurred in all these 11 patients. Conclusions: The operation of treating unruptured intracranial wide-neck bifurcation aneurysms with WEB device alone is simple, and there is no need for anticoagulation and antiplatelet treatment before and after the operation, the clinical effect is being good. WEB device provides a new treatment option for intracranial wide-neck bifurcation aneurysms.
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Affiliation(s)
- F Y Yang
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
| | - J M Liu
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
| | - Q Lyu
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
| | - G Wang
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
| | - Y C Tang
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
| | - S Y Du
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
| | - X Gao
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
| | - G B Liang
- Department of Neurosurgery, the Northern Theater General Hospital, Shenyang 110000, China
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Tang YC, Hsiao JR, Jiang SS, Chang JY, Chu PY, Liu KJ, Fang HL, Lin LM, Chen HH, Huang YW, Chen YT, Tsai FY, Lin SF, Chuang YJ, Kuo CC. c-MYC-directed NRF2 drives malignant progression of head and neck cancer via glucose-6-phosphate dehydrogenase and transketolase activation. Theranostics 2021; 11:5232-5247. [PMID: 33859744 PMCID: PMC8039948 DOI: 10.7150/thno.53417] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Accepted: 02/17/2021] [Indexed: 02/06/2023] Open
Abstract
Rationale: NRF2, a redox sensitive transcription factor, is up-regulated in head and neck squamous cell carcinoma (HNSCC), however, the associated impact and regulatory mechanisms remain unclear. Methods: The protein expression of NRF2 in HNSCC specimens was examined by IHC. The regulatory effect of c-MYC on NRF2 was validated by ChIP-qPCR, RT-qPCR and western blot. The impacts of NRF2 on malignant progression of HNSCC were determined through genetic manipulation and pharmacological inhibition in vitro and in vivo. The gene-set enrichment analysis (GSEA) on expression data of cDNA microarray combined with ChIP-qPCR, RT-qPCR, western blot, transwell migration/ invasion, cell proliferation and soft agar colony formation assays were used to investigate the regulatory mechanisms of NRF2. Results: NRF2 expression is positively correlated with malignant features of HNSCC. In addition, carcinogens, such as nicotine and arecoline, trigger c-MYC-directed NRF2 activation in HNSCC cells. NRF2 reprograms a wide range of cancer metabolic pathways and the most notable is the pentose phosphate pathway (PPP). Furthermore, glucose-6-phosphate dehydrogenase (G6PD) and transketolase (TKT) are critical downstream effectors of NRF2 that drive malignant progression of HNSCC; the coherently expressed signature NRF2/G6PD/TKT gene set is a potential prognostic biomarker for prediction of patient overall survival. Notably, G6PD- and TKT-regulated nucleotide biosynthesis is more important than redox regulation in determining malignant progression of HNSCC. Conclusions: Carcinogens trigger c-MYC-directed NRF2 activation. Over-activation of NRF2 promotes malignant progression of HNSCC through reprogramming G6PD- and TKT-mediated nucleotide biosynthesis. Targeting NRF2-directed cellular metabolism is an effective strategy for development of novel treatments for head and neck cancer.
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Lin SY, Yeh TK, Song JS, Hung MS, Cheng MF, Liao FY, Li AS, Cheng SY, Lin LM, Chiu CH, Wu MH, Lin YJ, Hsiao W, Sun M, Wang YH, Huang CH, Tang YC, Chang HH, Huang ZT, Chao YS, Shih C, Pan SL, Wu SY, Kuo CC, Ueng SH. 4-Bromophenylhydrazinyl benzenesulfonylphenylureas as indoleamine 2,3-dioxygenase inhibitors with in vivo target inhibition and anti-tumor efficacy. Bioorg Chem 2018; 77:600-607. [DOI: 10.1016/j.bioorg.2018.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Revised: 02/02/2018] [Accepted: 02/10/2018] [Indexed: 11/27/2022]
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Crowder SL, Mondul AM, Tang YC, Pepino MY, Sarma KP, Rozek LS, Wolf GT, Arthur AE. Pre-treatment Dietary Patterns Are Associated with the Presence of Symptoms 1 Year after Diagnosis in Patients with Head and Neck Cancer. Cancer Epidemiol Biomarkers Prev 2018. [DOI: 10.1158/1055-9965.epi-18-0045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract
Ninety percent of head and neck cancer (HNC) survivors experience disease and treatment related symptoms. Diet has the potential to reduce inflammation, modulate epigenetic changes and affect biological processes involved in the pathogenesis of symptoms. The objective of this study was to determine if pre-treatment dietary patterns are associated with the presence of symptoms 1-year after diagnosis. Methods: This was a longitudinal study of 295 newly diagnosed HNC patients. All patients completed a food frequency questionnaire and epidemiologic health survey. Self-reported symptoms were assessed pre-treatment and 1-year after diagnosis using a Likert scale ranging from “1: not at all bothered” by symptom to “5: extremely bothered”. Symptom scores were dichotomized as “not at all” vs. “slight - extremely”. Principal component analysis was used to derive pre-treatment dietary patterns. Multivariable logistic regression models examined the association of derived dietary patterns (fit by quartiles) and seven symptoms (trismus, xerostomia, dysphagia of liquids, dysphagia of solids, difficulty chewing, taste and mucositis). An overall symptom summary score was calculated (range 8–39) and dichotomized as <17 vs. ≥17. This cut-off was chosen by examining the distribution of scores and categorizing into two distinct subgroups naturally present in the data. Results: Two dietary patterns emerged: Prudent (high intakes of vegetables, fruit, fish, poultry, and whole grains) and Western (high intakes of red and processed meats, refined grains, potatoes, and French fries). After adjusting for age, baseline symptoms, tumor site, cancer stage, smoking, calories and HPV status, significant inverse associations were observed between pre-treatment Prudent pattern score and dysphagia of liquids (P = 0.01), dysphagia of solids (P = 0.02) and difficulty chewing (P = 0.02) at 1 year post- diagnosis. A statistically significant inverse association was observed between the overall symptom summary score and the Prudent pattern (P < 0.001). No significant associations were observed between the Western pattern and symptoms. Conclusion: Consumption of a pre-treatment Prudent diet may help reduce the risk of symptoms such as dysphagia and difficulty chewing 1-year after diagnosis in HNC survivors.
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Chen HH, Chang HH, Chang JY, Tang YC, Cheng YC, Lin LM, Cheng SY, Huang CH, Sun MW, Chen CT, Kuo CC. Enhanced B-Raf-mediated NRF2 gene transcription and HATs-mediated NRF2 protein acetylation contributes to ABCC1-mediated chemoresistance and glutathione-mediated survival in acquired topoisomerase II poison-resistant cancer cells. Free Radic Biol Med 2017; 113:505-518. [PMID: 29080842 DOI: 10.1016/j.freeradbiomed.2017.10.375] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 09/20/2017] [Accepted: 10/23/2017] [Indexed: 12/25/2022]
Abstract
Nuclear factor erythroid-2-related factor 2 (NRF2) mainly regulates transcriptional activation through antioxidant-responsive elements (AREs) present in the promoters of NRF2 target genes. Recently, we found that NRF2 was overexpressed in a KB-derived drug-resistant cancer cell panel. In this panel, KB-7D cells, which show acquired resistance to topoisomerase II (Top II) poisons, exhibited the highest NRF2 activation. To investigate whether NRF2 directly contributed to acquired resistance against Top II poisons, we manipulated NRF2 by genetic and pharmacological approaches. The result demonstrated that silencing of NRF2 by RNA interference increased the sensitivity and treatment with NRF2 activator decreased the sensitivity of KB and KB-7D cells toward Top II poisons. Further, increased B-Raf-mediated NRF2 gene transcription and HATs-mediated NRF2 protein acetylation activated NRF2 signaling in KB-7D cells. Moreover, increased binding of NRF2 to an ARE in the promoter of ATP-binding cassette subfamily C member 1 (ABCC1) directly contributed to Top II poison resistance. In addition, activation of NRF2 increased glutathione level and antioxidant capacity in KB-7D cells compared with that in KB cells; moreover, high glutathione level provided survival advantage to KB-7D cells. Our study is the first to show that aberrant NRF2 activation is via increased B-Raf-mediated NRF2 gene transcription and HATs-mediated NRF2 protein acetylation, which increases the acquired resistance and promote the survival of Top II poison-resistant cancer cells. Importantly, NRF2 downstream effectors ABCC1 and glutathione directly contribute to acquired resistance and survival, respectively. These results suggest that blockade of NRF2 signaling may enhance therapeutic efficacy and reduce the survival of Top II poison-refractory tumors in clinical.
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Affiliation(s)
- Huang-Hui Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan
| | - Hsin-Huei Chang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan
| | - Jang-Yang Chang
- National Institute of Cancer Research, National Health Research Institutes, Zhunan 35053, Taiwan; Division of Hematology/Oncology, Department of Internal Medicine, National Cheng Kung University Hospital, Tainan 70101, Taiwan; Institute of Clinical Pharmacy and Pharmaceutical Sciences, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Ya-Chu Tang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan; Institute of Bioinformatics and Structural Biology, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yung-Chi Cheng
- Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06510, USA
| | - Li-Mei Lin
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan
| | - Shu-Ying Cheng
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan
| | - Chih-Hsiang Huang
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan
| | - Man-Wu Sun
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan
| | - Chiung-Tong Chen
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan
| | - Ching-Chuan Kuo
- Institute of Biotechnology and Pharmaceutical Research, National Health Research Institutes, Zhunan 35053, Taiwan; Institute of Clinical Pharmacy and Pharmaceutical Sciences, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan; Graduate Program for Aging, China Medical University, Taichung 40402, Taiwan.
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Lee CH, Pan KL, Tang YC, Tsai MH, Cheng AJ, Shen MY, Cheng YM, Huang TT, Lin P. LDOC1 silenced by cigarette exposure and involved in oral neoplastic transformation. Oncotarget 2016; 6:25188-201. [PMID: 26317789 PMCID: PMC4694824 DOI: 10.18632/oncotarget.4512] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 06/29/2015] [Indexed: 11/25/2022] Open
Abstract
Previously, we identified global epigenetic aberrations in smoking-associated oral squamous cell carcinoma (OSCC). We hypothesized that cigarette exposure triggers OSCC through alteration of the methylome of oral cells. Here we report that cigarette smoke condensate (CSC) significantly changes the genomic 5-methyldeoxycytidine content and nuclear accumulation of DNA methyltransferase 1 (DNMT1) and DNMT3A in human untransformed oral cells. By using integrated analysis of cDNA and methylation arrays of the smoking-associated dysplastic oral cell line and OSCC tumors, respectively, we identified four epigenetic targets—UCHL1, GPX3, LXN, and LDOC1—which may be silenced by cigarette. Results of quantitative methylation-specific PCR showed that among these four genes, LDOC1 promoter was the most sensitive to CSC. LDOC1 promoter hypermethylation and gene silencing followed 3 weeks of CSC treatment. LDOC1 knockdown led to a proliferative response and acquired clonogenicity of untransformed oral cells. Immunohistochemistry showed that LDOC1 was downregulated in 53.3% (8/15) and 57.1% (20/35) of premalignant oral tissues and early stage OSCCs, respectively, whereas 76.5% (13/17) of normal oral tissues showed high LDOC1 expression. Furthermore, the microarray data showed that LDOC1 expression had decreased in the lung tissues of current smokers compared with that in those of never smokers and had significantly decreased in the lung tumors of smokers compared with that in normal lung tissues. Our data suggest that CSC-induced promoter methylation may contribute to LDOC1 downregulation, thereby conferring oncogenic features to oral cells. These findings also imply a tumor suppressor role of LDOC1 in smoking-related malignancies such as OSCC and lung cancer.
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Affiliation(s)
- Chia-Huei Lee
- National Institute of Cancer Research, National Health Research Institutes, Taipei, Taiwan
| | - Kao-Lu Pan
- National Institutes of Environmental Health Sciences, National Health Research Institutes, Taipei, Taiwan
| | - Ya-Chu Tang
- National Institute of Cancer Research, National Health Research Institutes, Taipei, Taiwan
| | - Ming-Hsien Tsai
- National Institutes of Environmental Health Sciences, National Health Research Institutes, Taipei, Taiwan
| | - Ann-Joy Cheng
- Department of Medical Biotechnology and Laboratory Science, Chang Gung University, Taoyuan City, Taiwan
| | - Mei-Ya Shen
- National Institutes of Environmental Health Sciences, National Health Research Institutes, Taipei, Taiwan
| | - Ying-Min Cheng
- National Institute of Cancer Research, National Health Research Institutes, Taipei, Taiwan
| | - Tze-Ta Huang
- Department of Oral Medicine, National Cheng Kung University, Tainan City, Taiwan
| | - Pinpin Lin
- National Institutes of Environmental Health Sciences, National Health Research Institutes, Taipei, Taiwan
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Abstract
The purpose of this study was to evaluate the clinical efficacy of initial periodontal therapy in gingival pregnancy tumors. Thirty-nine patients diagnosed with gingival tumors of pregnancy between 2007 and 2015 were enrolled in this study. The patients received initial periodontal therapy, then supportive periodontal therapies at 3- to 6-month intervals. The patients underwent follow up for 6 months to 8 years after treatment. After plaque control, supragingival scaling, and root planning, the tumors in 25 patients were gradually eliminated without the necessity of surgery. In 3 patients, tumors <5 mm in size disappeared in a mean time of 3.6 months, 4 patients with tumors 5-10 mm disappeared in a time of 7.5 months, 11 patients with tumors 10-15 mm disappeared in 10.2 months, 6 patients with tumors 15-20 mm disappeared in 15 months, and one patient with a tumor >20 mm disappeared in 20 months. No recurrence of gingival pregnancy tumors was noted during subsequent follow-up. Initial periodontal therapy combined with oral hygiene maintenance is efficacious in treating gingival pregnancy tumors of patients with normal hormone levels, which can potentially serve as an option to avoid surgery.
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Affiliation(s)
- Y Q Zhu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei Province, China.,Department of Periodontology, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei Province, China.,The Affiliated Huizhou Stomatologic Hospital of Jinan University & Huizhou Stomatologic Hospital, Huizhou, Guangdong Province, China
| | - Y Q Wang
- The Affiliated Huizhou Stomatologic Hospital of Jinan University & Huizhou Stomatologic Hospital, Huizhou, Guangdong Province, China
| | - Y C Tang
- The Affiliated Huizhou Stomatologic Hospital of Jinan University & Huizhou Stomatologic Hospital, Huizhou, Guangdong Province, China
| | - C Z Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei Province, China.,Department of Periodontology, School & Hospital of Stomatology, Wuhan University, Wuhan, Hubei Province, China
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Wu XL, Tang YC, Lu QY, Xiao XL, Song TB, Tang FR. Astrocytic Cx 43 and Cx 40 in the mouse hippocampus during and after pilocarpine-induced status epilepticus. Exp Brain Res 2015; 233:1529-39. [PMID: 25690864 DOI: 10.1007/s00221-015-4226-8] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Accepted: 02/09/2015] [Indexed: 12/15/2022]
Abstract
Astrocytes have now been well accepted to play important roles in epileptogenesis by controlling gliotransmitter release and neuronal excitability, contributing to blood-brain barrier dysfunction and involving in brain inflammation. Recent studies indicate that abnormal expression of gap junction protein connexin (Cx) may also be a contributing factor for seizure generation. To further address this issue, we investigated the progressive changes of Cx 43 and Cx 40 in the mouse hippocampus at 4 h, 1 day, 1 week and 2 months during and after pilocarpine-induced status epilepticus (PISE). The co-localization of Cx 43 and Cx 40 with glial fibrillary acidic protein (GFAP) was also examined. We observed that Cx 43 and Cx 40 protein expression remained unaltered at 4 h during and at 1 day (acute stage) after PISE. However, their expression was significantly increased in CA1 and CA3 areas and in the dentate gyrus at 1 week (latent stage) and 2 months (chronic stage) after PISE. Double immunofluorescence labeling indicated the localization of Cx 43 and Cx 40 in astrocytes. Combined with progressive neuronal loss in the mouse hippocampus, our results suggest that the increase in gap junctions in the neuronoglial syncytium of reactive astrocytes may be implicated in synchronization of hippocampal hyperactivity leading to neuronal loss and epileptogenesis.
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Affiliation(s)
- X L Wu
- Department of Human Anatomy, Histology and Embryology, Xi'an Jiaotong University Health Science Center, Xi'an, 710061, Shaanxi, People's Republic of China
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Lee CH, Chang JSM, Syu SH, Wong TS, Chan JYW, Tang YC, Yang ZP, Yang WC, Chen CT, Lu SC, Tang PH, Yang TC, Chu PY, Hsiao JR, Liu KJ. IL-1β promotes malignant transformation and tumor aggressiveness in oral cancer. J Cell Physiol 2015; 230:875-84. [PMID: 25204733 DOI: 10.1002/jcp.24816] [Citation(s) in RCA: 135] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 09/05/2014] [Indexed: 12/11/2022]
Abstract
Chronic inflammation, coupled with alcohol, betel quid, and cigarette consumption, is associated with oral squamous cell carcinoma (OSCC). Interleukin-1 beta (IL-1β) is a critical mediator of chronic inflammation and implicated in many cancers. In this study, we showed that increased pro-IL-1β expression was associated with the severity of oral malignant transformation in a mouse OSCC model induced by 4-Nitroquinolin-1-oxide (4-NQO) and arecoline, two carcinogens related to tobacco and betel quid, respectively. Using microarray and quantitative PCR assay, we showed that pro-IL-1β was upregulated in human OSCC tumors associated with tobacco and betel quid consumption. In a human OSCC cell line TW2.6, we demonstrated nicotine-derived nitrosamine ketone (NNK) and arecoline stimulated IL-1β secretion in an inflammasome-dependent manner. IL-1β treatment significantly increased the proliferation and dysregulated the Akt signaling pathways of dysplastic oral keratinocytes (DOKs). Using cytokine antibodies and inflammation cytometric bead arrays, we found that DOK and OSCC cells secreted high levels of IL-6, IL-8, and growth-regulated oncogene-α following IL-1β stimulation. The conditioned medium of IL-1β-treated OSCC cells exerted significant proangiogenic effects. Crucially, IL-1β increased the invasiveness of OSCC cells through the epithelial-mesenchymal transition (EMT), characterized by downregulation of E-cadherin, upregulation of Snail, Slug, and Vimentin, and alterations in morphology. These findings provide novel insights into the mechanism underlying OSCC tumorigenesis. Our study suggested that IL-1β can be induced by tobacco and betel quid-related carcinogens, and participates in the early and late stages of oral carcinogenesis by increasing the proliferation of dysplasia oral cells, stimulating oncogenic cytokines, and promoting aggressiveness of OSCC.
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Affiliation(s)
- Chia-Huei Lee
- National Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan
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Abstract
Resistin and endothelin (ET)-1 have been reported to inhibit adipogenesis and regulate adipocyte insulin resistance, respectively. Although both hormones interact with each other, the exact signaling pathway of ET-1 to act on resistin gene expression is still unknown. Using 3T3-L1 adipocytes, we investigated the signaling pathways involved in ET-1-stimulated resistin gene expression. The up-regulation of resistin mRNA expression by ET-1 depends on concentration and timing. The concentration of ET-1 that increased resistin mRNA levels by 100%-250% was approximately 100 nM for a range of 0.25-12 hours of treatment. Treatment with actinomycin D blocked ET-1-increased resistin mRNA levels, suggesting that the effect of ET-1 requires new mRNA synthesis. Treatment with an inhibitor of the ET type-A receptor, such as N-[1-Formyl-N-[N-[(hexahydro-1H-azepin-1-yl)carbonyl]-L-leucyl]-D-tryptophyl]-D-tryptophan (BQ610), but not with the ET type-B receptor antagonist N-[(cis-2,6-Dimethyl-1-piperidinyl)carbonyl]-4-methyl-L-leucyl-1-(methoxycarbonyl)-D-tryptophyl-D-norleucine (BQ788), blocked ET-1, increased the levels of resistin mRNA, and phosphorylated levels of downstream signaling molecules, such as ERK1/2, c-Jun N-terminal kinases (JNKs), protein kinase B (AKT), and signal transducer and activator of transcription 3 (STAT3). Moreover, pretreatment of specific inhibitors of either ERK1/2 (1,4-diamino-2,3-dicyano-1,4-bis[2-aminophenylthio]butadiene [U0126] and 2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one [PD98059], two inhibitors of MEK1), JNKs (SP600125), phosphatidylinositol 3-kinase/AKT (LY294002 and Wortmannin), or Janus kinase 2 (JAK2)/STAT3 ((E)-2-Cyano-3-(3,4-dihydrophenyl)-N-(phenylmethyl)-2-propenamide, AG490) prevented ET-1-increased levels of resistin mRNA and reduced the ET-1-stimulated phosphorylation of ERK1/2, JNKs, AKT, and STAT3, respectively. However, the p38 kinase antagonist 4-[5-(4-Fluorophenyl)-2-[4-(methylsulfonyl)phenyl]-1H-imidazol-4-yl]pyridine (SB203580) did not alter the effect of ET-1. These results imply that ET type-A receptor, ERK1/2, JNKs, AKT, and JAK2, but not ET type-B receptor or p38, are necessary for the ET-1 stimulation of resistin gene expression. In vivo observations that ET-1 increased resistin mRNA and protein levels in sc and epididymal adipose tissues support the in vitro findings.
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Affiliation(s)
- Ya-Chu Tang
- Department of Life Sciences (Y.-C.T., C.-W.L., H.-H.C., Y.-H.K.), National Central University, Jhongli, Taoyuan 32001, Taiwan; Department and Institute of Physiology (C.-C.J.), National Yang Ming University, Taipei 11221, Taiwan; Division of Gastroenterology (Y.-C.K.), Department of Internal Medicine, Taiwan Landseed Hospital, Taoyuan 32449, Taiwan; and Department of Emergency (C.-C.K., Y.-M.H.), Armed Forces Taoyuan General Hospital, Taoyuan 32551, Taiwan
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Chang HH, Huang YM, Wu CP, Tang YC, Liu CW, Huang CH, Ho LT, Wu LY, Kuo YC, Kao YH. Endothelin-1 stimulates suppressor of cytokine signaling-3 gene expression in adipocytes. Gen Comp Endocrinol 2012; 178:450-8. [PMID: 22766240 DOI: 10.1016/j.ygcen.2012.06.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 06/07/2012] [Accepted: 06/22/2012] [Indexed: 01/20/2023]
Abstract
Endothelin (ET)-1 and suppressor of cytokine signaling (SOCS)-3 were respectively found to regulate energy metabolism and hormone signaling in fat cells. Although ET-1 can also regulate the expression of SOCS-3-stimulating hormones, it is still unknown whether ET-1 regulates SOCS-3 gene expression. This study investigated the pathways involved in ET-1's modulation of SOCS-3 gene expression in 3T3-L1 adipocytes. ET-1 upregulated SOCS-3 mRNA and protein expression in dose- and time-dependent manners. The concentration of ET-1 that increased SOCS-3 mRNA levels by 250-400% was ∼100nM with 2-4h of treatment. Treatment with actinomycin D prevented ET-1-stimulated SOCS-3 mRNA expression, suggesting that the effect of ET-1 requires new mRNA synthesis. Pretreatment with the ET type A receptor (ET(A)R) antagonist, BQ-610, but not the ET type B receptor (ET(B)R) antagonist, BQ-788, prevented the stimulatory effect of ET-1 on SOCS-3 gene expression. The specific inhibitors of either MEK1 (U-0126 and PD-98059), JAK (AG-490), JNK (SP-600125), or PI3K (LY-294002 and wortmannin) reduced ET-1-increased levels of SOCS-3 mRNA and respectively inhibited ET-1-stimulated activities of MEK1, JAK, JNK, and PI3K. These results imply that the ET(A)R, ERK, JAK, JNK, and PI3K are functionally necessary for ET-1's stimulation of SOCS-3 gene expression. Moreover, ET-1 was observed to upregulate expressions of SOCS-1, -2, -3, -4, -5, and -6 mRNAs, but not SOCS-7 or cytokine-inducible SH2-containing protein-1 mRNAs. This suggests that ET-1 selectively affects particular types of SOCS family members. Changes in SOCS gene expressions induced by ET-1 may help explain the mechanism by which ET-1 modulates hormone signaling of adipocytes.
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Affiliation(s)
- Hsin-Huei Chang
- Department of Life Sciences, National Central University, Jhongli, Taoyuan, Taiwan
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13
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Xu JH, Long L, Tang YC, Zhang JT, Hut HT, Tang FR. CCR3, CCR2A and macrophage inflammatory protein (MIP)-1a, monocyte chemotactic protein-1 (MCP-1) in the mouse hippocampus during and after pilocarpine-induced status epilepticus (PISE) . Neuropathol Appl Neurobiol 2009; 35:496-514. [PMID: 19490431 DOI: 10.1111/j.1365-2990.2009.01022.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
AIMS To investigate protein and gene expressions of chemokine subtypes CCR3, CCR2A and their respective ligands macrophage inflammatory protein 1-alpha (MIP-1alpha), monocyte chemotactic protein-1 (MCP-1) in the normal mouse central nervous system (CNS) and in the hippocampus at different time points during and after pilocarpine-induced status epilepticus (PISE). METHODS CCR3 and MIP-1alpha protein expressions were mapped in the mouse CNS. The protein and gene expressions of CCR3 and CCR2A and their respective ligands MIP-1alpha, MCP-1 in the hippocampus were studies by immunocytochemical and quantitative real-time RT-PCR during and after PISE. RESULTS CCR3 and MIP-1alpha gene expression and immunopositive neurones were broadly distributed in the CNS. CCR3 and CCA2A gene and their protein expression were downregulated in the hippocampus at 1 h during PISE. The protein expression of MIP-1alpha, MCP-1 decreased but gene expression increased at 2 h during PISE. In the hilus of the dentate gyrus, significant reduction of the numbers of CCR3, CCR2A, MCP-1 immunopositive neurones occurred from 1 h during to 2 months after PISE, but the number of MIP-1alpha neurones reduced from 2 h during to 2 months after PISE. Induced expression of CCR3 at 1 week, CCR2A, MCP-1 or MIP-1alpha at 1 week and 2 months after PISE was found in reactive astrocytes. MCP-1 was also demonstrated in the blood vessels of the hippocampus at 2 months after PISE. CONCLUSIONS CCR3 and MIP-1alpha may play important functional roles in the mouse brain. The downregulation of CCR3, CCR2A, MIP-1alpha and MCP-1 in the hippocampal neurones at the acute stage during and after PISE may weaken the neuroprotective mechanisms. However, induced expression of MCP-1 in hippocampal blood vessel may be related to changes in permeability of the blood-brain barrier during epileptogenesis.
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Affiliation(s)
- J H Xu
- Epilepsy Research Lab, National Neuroscience Institute, Singapore
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14
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Tang FR, Chia SC, Jiang FL, Ma DL, Chen PM, Tang YC. Calcium binding protein containing neurons in the gliotic mouse hippocampus with special reference to their afferents from the medial septum and the entorhinal cortex. Neuroscience 2006; 140:1467-79. [PMID: 16650619 DOI: 10.1016/j.neuroscience.2006.03.022] [Citation(s) in RCA: 32] [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] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Revised: 03/06/2006] [Accepted: 03/12/2006] [Indexed: 11/26/2022]
Abstract
In CA1 area and the hilus of the dentate gyrus of the mouse hippocampus, drastic reduction of NeuN, calbindin, calretinin, or parvalbumin immunopositive neurons was shown at 3, 7 and 60 days after pilocarpine-induced status epilepticus. In gliotic CA1 area at 60 days, few dendritic branches of calcium binding protein immunopositive neurons could be found suggesting reorganization of the afferents of surviving calcium binding protein immunopositive neurons. Calbindin, calretinin, or parvalbumin and 5-bromo-2'-deoxyuridine (BrdU) double labeling showed that calcium binding protein immunopositive neurons in gliotic CA1 area at 60 days were surviving instead of newly generated neurons. Iontophoretic injection of Phaseolus vulgaris leucoagglutinin into the medial septum and the nucleus of the diagonal band of Broca or the lateral entorhinal cortex showed contacts between Phaseolus vulgaris leucoagglutinin immunopositive en passant and terminal boutons and surviving calcium binding protein immunopositive neurons in the hippocampus. The presence in the gliotic hippocampus of enlarged and/or aggregated bouton-like structures 60 days after pilocarpine-induced status epilepticus is indicative for the reorganization of connections between the hippocampal afferents and surviving hippocampal neurons. This reconstruction could be a factor in the ongoing epileptic activity in this model of mesial temporal lobe epilepsy.
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Affiliation(s)
- F R Tang
- Epilepsy Research Laboratory, National Neuroscience Institute, 11 Jalan Tan Tock Seng, Singapore 308433.
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15
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Kwok TT, Chen P, Liu PY, Tang YC, Kong SK, Fung KP, Choy YM. The anti-tumour effect of Klebsiella pneumoniae capsular polysaccharides. Biol Signals Recept 2001; 10:294-8. [PMID: 11490094 DOI: 10.1159/000046896] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
K24 capsular polysaccharide (K24-CPS), with a known structure of a repeating unit, was isolated from the capsule of Klebsiella pneumoniae serotype K24. The polysaccharide was found to suppress the proliferation of Ehrlich ascites tumour (EAT) cells in vitro, but did not alter the cell cycle distribution of cells. K24-CPS treatment reduced the tyrosine phosphorylation of some proteins in EAT cells. Furthermore, the treatment also decreased the expression of c-JUN, but had no effect on the levels of c-FOS and c-MYC. It is speculated that the growth suppression effect of K24-CPS may be related to its effect in down-regulating c-JUN expression.
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Affiliation(s)
- T T Kwok
- Department of Biochemistry, The Chinese University of Hong Kong. Hong Kong
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16
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Lee KF, Tang YC, Leong HT. Emergency laparoscopic orchidectomy for torsion of intra-abdominal testis: a case report. J R Coll Surg Edinb 2001; 46:110-2. [PMID: 11329738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Torsion of an intraabdominal testis is a rare cause of acute abdominal pain. With a history of undescended testis, it is difficult to establish the diagnosis and to exclude other emergency abdominal conditions without a laparotomy. The following case report illustrates the usefulness of laparoscopy as a diagnostic as well as a therapeutic tool in such a condition.
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Affiliation(s)
- K F Lee
- Department of Surgery, Alice Ho Miu Ling Nethersole Hospital, Hong Kong SAR, P.R. China.
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17
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Abstract
AIM: To test the hypothesis to block VEGF expression of SMMC-7721 hepatomacells may inhibit tumor growth using the rat hepatoma model.
METHODS: Amplifiy the 200 VEGF cDNA fragment and insert it into human U6 gene cassette in the reverse orientation transcribing small antisense RNA which could specifically interact with VEGF165, and VEGF121 mRNA. Construct the retroviral vector containing this antisense VEGF U6 cassette and package the replication-deficient recombinant retrovirus. SMMC-7721 cells were transduced with these virus and positive clones were selected with G418. PCR and Southern blot analysis were performed to determine if U6 cassette integrated into the genomic DNA of positive clone. Transfected tumor cells were evaluated for RNA expression by ribonuclease protection assays. The VEGF protein in the supernatant of parental tumor cells and genetically modified tumor cells was determined with ELISA. In vitro and in vivo growth properties of antisense VEGF cell clone in nude mice were analyzed.
RESULTS: Restriction enzyme digestion and PCR sequencing verified that the antisense VEGF RNA retroviral vector was successfully constructed. After G418 selection, resistant SMMC-7721 cell clone was picked up. PCR and Southern blot analysis suggested that U6 cassette was integrated into the cell genomic DNA. Stable SMMC-7721 cell clone transduced with U6 antisense RNA cassette could express 200 bp small antisense VEGF RNA and secrete reduced levels of VEGF in culture condition. Production of VEGF by antisense transgenea2expressing cells was 65 ± 10 ng/L per 106 cells, 420 ± 45 ng/L per 106 cells in sense group and 485 ± 30 ng/ L per 106 cells in the negative control group, (P < 0.5). The antisense-VEGF cell clone appeared phenotypically indistinguishable from SMMC-7721 cells and SMMC-7721 cells transfected sense VEGF. The growth rate of the antisense-VEGF cell clone was the same as the control cells. When S.C. was implanted into nude mice, growth of antisense-VEGF cell lines was greatly inhibited compared with control cells.
CONCLUSION: Expression of antisense VEGF RNA in SMMC-7721 cells could decrease the tumorigenicity, and antisense-VEGF gene therapy may be an adjuvant treatment for hepatoma.
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Affiliation(s)
- Y C Tang
- Department of Biochemistry, Shanghai Second Medical University, Shanghai 200025,China.
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18
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Wang Y, Wu YS, Zheng PZ, Yang WX, Fang GA, Tang YC, Xie F, Lan FH, Zhu ZY. A novel mutation in the NADH-cytochrome b5 reductase gene of a Chinese patient with recessive congenital methemoglobinemia. Blood 2000; 95:3250-5. [PMID: 10807796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023] Open
Abstract
Recessive congenital methemoglobinemia due to nicotinamide adenine dinucleotide (NADH)-cytochrome b5 reductase (b5R) deficiency is classified into 2 clinical types: type 1 (erythrocyte type) and type 2 (generalized type). We found a Chinese family with type 1 recessive congenital methemoglobinemia, the patients from which were diagnosed according to clinical symptoms and b5R enzyme activity in the blood cells. To learn the molecular basis of type 1 recessive congenital methemoglobinemia in this Chinese family, we isolated total RNA from the peripheral leukocytes of the propositus and b5R complementary DNA (cDNA) by reverse transcription- polymerase chain reaction (RT-PCR). The coding region of the b5R cDNA was analyzed by sequencing the cloned PCR products. The results showed that the propositus was homozygous for a G-->A transition at codon 203 in exon 7, changing a cysteine to a tyrosine (Cys203Tyr). To characterize the mutant enzyme, both glutathione S-transferase (GST)-fused wild-type b5R and GST-fused mutant Cys203Tyr b5R were expressed in Escherichia coli and affinity purified. The results showed that the catalytic activity of the enzyme was not much affected by this amino acid substitution, but the mutant enzyme exhibited decreased heat stability and increased susceptibility to trypsin. These properties of the mutant enzyme would account for the restricted b5R deficiency and mild clinical manifestations of these type 1 patients. The finding of this novel mutation makes codon 203 the only position within the b5R gene at which more than 1 mutation has been found.
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Affiliation(s)
- Y Wang
- Research Laboratories, Center for Laboratory Medicine, Fuzhou General Hospital, Fuzhou City, Fujian Province, China.
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19
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Bao L, Miao ZW, Zhou PA, Jiang Y, Sha YL, Zhang RJ, Tang YC. IS3 peptide-formed ion channels in rat skeletal muscle cell membranes. FEBS Lett 1999; 446:351-4. [PMID: 10100872 DOI: 10.1016/s0014-5793(99)00249-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A 22-mer peptide, identical to the primary sequence of domain I segment 3 (IS3) of rat brain sodium channel I, was synthesized. With the patch clamp cell-attached technique, single channel currents could be recorded from the patches of cultured rat myotube membranes when the patches were held at hyperpolarized potentials and the electrode solution contained NaCl and 1 microM IS3, indicating that IS3 incorporated into the membranes and formed ion channels. The single channel conductances of IS3 channels were distributed heterogeneously, but mainly in the range of 10-25 pS. There was a tendency that the mean open time and open probability of IS3 channels increased and the mean close time decreased with the increasing of hyperpolarized membrane potentials. IS3 channels are highly selective for Na+ and Li+ but not for Cl- and K+, similar to the authentic Na+ channels.
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Affiliation(s)
- L Bao
- College of Life Sciences, Peking University, Beijing, PR China
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20
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Abstract
We evaluated retrospectively the outcome of artery-sparing (AS) versus non-artery-sparing (NAS) laparoscopic varicocelectomy and measured any reversal of testicular growth. Twenty patients (13 left and 7 bilateral varicoceles) were evaluated after surgery. A total of 27 varicocelectomies (20 AS and 7 NAS) were performed. The indication for surgery was smaller testicular size on the affected side in all patients and discomfort/pain in 3. The mean age was 12.9 years (range 8-15 years) at surgery. The testicular volumes were determined clinically and by color Doppler sonography (US). The follow-up time was 6-48 months after surgery. There were 4 recurrences out of 27 varicocelectomies (15%), of which 1 has been reoperated. Testicular volumes were equal in both groups after surgery, indicating catch-up growth except in the cases with minor recurrences (2 AS and 2 NAS varicocelectomies). In 12 testes, dilated veins in the pampiniform plexus were revealed by US. No severe intraoperative complications occurred. Three patients had a hydrocele after surgery (11%). These data show that there is testicular catch-up growth after varicocelectomy, but some questions remain unanswered: (1) should the remaining dilated veins detected by Doppler US be tackled; and (2) is an AS operation worthwhile?
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Affiliation(s)
- L Lund
- Division of Paediatric Surgery, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
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21
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Lan FH, Tang YC, Huang CH, Wu YS, Zhu ZY. Antibody-based spot test for NADH-cytochrome b5 reductase activity for the laboratory diagnosis of congenital methemoglobinemia. Clin Chim Acta 1998; 273:13-20. [PMID: 9620466 DOI: 10.1016/s0009-8981(98)00022-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
NADH (reduced Coenzyme I)-cytochrome b5 reductase (b5R) is a multifunctional redox enzyme, whose deficiency causes recessive congenital methemoglobinemia. A novel procedure for the detection of b5R activity in human hemolysates was developed, in which b5R monoclonal antibodies dot-blotted on nitrocellulose membrane was used to capture and enrich b5R from hemolysates, and the captured b5R activity was subsequently visualized with the substrate 3-(4,5-dimethylthiazolyl-2)-2,5-diphenyltetrazolium bromide. Application of this simple method to the detection of b5R activity in the hemolysates from different subjects demonstrated that it was both sensitive and reliable. Our method would be useful for the laboratory diagnosis of congenital methemoglobinemia.
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Affiliation(s)
- F H Lan
- Department of Clinical Laboratory Diagnostics, DongFang Hospital, Fuzhou City, Fujian Province, China
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22
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Thomson KG, Dietzgen RG, Gibbs AJ, Tang YC, Liesack W, Teakle DS, Stackebrandt E. Identification of Zucchini yellow mosaic potyvirus by RT-PCR and analysis of sequence variability. J Virol Methods 1995; 55:83-96. [PMID: 8576311 DOI: 10.1016/0166-0934(95)00047-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.1] [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: 01/31/2023]
Abstract
A reverse transcription-polymerase chain reaction (RT-PCR) method was used to identify Zucchini yellow mosaic virus (ZYMV) in leaves of infected cucurbits. Oligonucleotide primers which annealed to regions in the nuclear inclusion body (NIb) and the coat protein (CP) genes, generated a 300-bp product from ZYMV and also from the closely related watermelon mosaic virus type 2 (WMV-2). However, no product was obtained from papaya ringspot potyvirus which also infects cucurbits. ZYMV and WMV-2 were differentiated using a third primer which was complementary to a sequence in the 3'-untranslated region; a 1186-bp amplified product was obtained for ZYMV only. Nucleotide sequence analysis of the 300-bp fragments of Australian ZYMV and WMV-2 strains revealed 93.7-100% sequence identity between ZYMV strains. Multiple sequence alignments indicated that the nucleotide sequence which codes for the N-terminus of the CP was 74-100% identical for different isolates of ZYMV. The Australian isolate of WMV-2 was 43-46% identical to all isolates of ZYMV and was 84.6% identical to a Florida isolate of WMV-2.
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Affiliation(s)
- K G Thomson
- Queensland Department of Primary Industries, Gehrmann Laboratories, University of Queensland, Brisbane, Australia
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23
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Chiang CH, Tang YC, Wang SE, Hwang JC. Changes in phrenic, hypoglossal and recurrent laryngeal nerve activities after intravenous infusions of aminophylline in cats. Eur Respir J 1995. [DOI: 10.1183/09031936.95.08040632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Aminophylline is known to have respiratory stimulant properties, and it has been suggested that it may also be effective in sleep apnoea. However, its role in this disorder remains uncertain. Theoretically, increasing upper airway motoneural activity in order to maintain airway patency might alleviate obstructive sleep apnoea. On the other hand, increasing the respiratory drive may also prove beneficial in treating central sleep apnoea. In these studies, we attempted to determine the effect of aminophylline on neural activities of the upper airway and diaphragm. We administered intravenously either a low dose (4 mg.kg-1) or a high dose (16 mg.kg-1) of aminophylline to decerebrated, vagotomized and paralysed cats, and continuously recorded the phrenic hypoglossal and recurrent laryngeal nerve activities for 3 h. Results showed that a high dose of aminophylline induced a marked increase in phrenic nerve activity, but not hypoglossal or recurrent laryngeal nerve activity. In a group treated with a low dosage of aminophylline, a significant increase of activity was found in all three nerves. Furthermore, phrenic nerve activity increased more with a high dose than with a low dose. We confirmed that aminophylline has dose-dependent and selective effects on respiratory neural activity. A low dose acts on the upper airway and diaphragm, but a high dose induces a marked increase in central respiratory drive. According to our results, low dose aminophylline might be beneficial in obstructive sleep apnoea, whereas, a high or low dose might improve some cases of central sleep apnoea.
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24
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Chiang CH, Tang YC, Wang SE, Hwang JC. Changes in phrenic, hypoglossal and recurrent laryngeal nerve activities after intravenous infusions of aminophylline in cats. Eur Respir J 1995; 8:632-6. [PMID: 7664865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Aminophylline is known to have respiratory stimulant properties, and it has been suggested that it may also be effective in sleep apnoea. However, its role in this disorder remains uncertain. Theoretically, increasing upper airway motoneural activity in order to maintain airway patency might alleviate obstructive sleep apnoea. On the other hand, increasing the respiratory drive may also prove beneficial in treating central sleep apnoea. In these studies, we attempted to determine the effect of aminophylline on neural activities of the upper airway and diaphragm. We administered intravenously either a low dose (4 mg.kg-1) or a high dose (16 mg.kg-1) of aminophylline to decerebrated, vagotomized and paralysed cats, and continuously recorded the phrenic hypoglossal and recurrent laryngeal nerve activities for 3 h. Results showed that a high dose of aminophylline induced a marked increase in phrenic nerve activity, but not hypoglossal or recurrent laryngeal nerve activity. In a group treated with a low dosage of aminophylline, a significant increase of activity was found in all three nerves. Furthermore, phrenic nerve activity increased more with a high dose than with a low dose. We confirmed that aminophylline has dose-dependent and selective effects on respiratory neural activity. A low dose acts on the upper airway and diaphragm, but a high dose induces a marked increase in central respiratory drive. According to our results, low dose aminophylline might be beneficial in obstructive sleep apnoea, whereas, a high or low dose might improve some cases of central sleep apnoea.
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Affiliation(s)
- C H Chiang
- Dept of Medicine, Tri-Service General Hospital, National Defense, Medical, Center Taipei, Taiwan, Republic of China
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25
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Kaneko T, LeMere M, Tang YC. Analysis of neutron+nucleus scattering data with nonlocal optical potentials based on the resonating-group formulation. Phys Rev C Nucl Phys 1992; 46:298-305. [PMID: 9968109 DOI: 10.1103/physrevc.46.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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26
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He J, Tell GS, Tang YC, Mo PS, He GQ. Effect of dietary electrolytes upon calcium excretion: the Yi People Study. J Hypertens 1992; 10:671-6. [PMID: 1321195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To investigate the relations of dietary sodium, potassium, calcium and magnesium with urinary calcium excretion. DESIGN Cross-sectional epidemiologic study of 417 Chinese men with a wide variation of electrolyte intakes. METHODS Three consecutive 24-h dietary recall data and three 24-h urinary samples were obtained on the same days. Urinary analyses included calcium, sodium, potassium, magnesium and creatinine. A fasting blood sample was obtained on the first morning, and serum analyses included electrolytes, creatinine and urea nitrogen. Correlation and regression analyses were used to examine the relation between electrolyte intake and calcium excretion. RESULTS Whilst urinary calcium was not related to dietary calcium, it was significantly correlated with dietary sodium and potassium. A linear relationship was seen between dietary sodium, potassium and urinary calcium. After adjustment for age, body mass index, serum creatinine, dietary calcium intake and other electrolytes, urinary calcium was positively related to dietary sodium and negatively related to dietary potassium. This relation was seen at different levels of dietary calcium intake. The relation between magnesium intake and calcium excretion was inconsistent. CONCLUSION These results suggest that sodium and potassium intake influence urinary calcium excretion in normotensive men.
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Affiliation(s)
- J He
- Peking Union Medical College, Beijing, People's Republic of China
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27
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Kaneko T, LeMere M, Tang YC. General features of nucleon-nucleus interaction in the resonating-group formulation. Phys Rev C Nucl Phys 1992; 45:2409-2416. [PMID: 9968004 DOI: 10.1103/physrevc.45.2409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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Tang YC. [Rapid diagnosis of pulmonary Pseudomonas aeruginosa infections by indirect immunofluorescent antibody]. Zhonghua Jie He He Hu Xi Za Zhi 1992; 15:8-10, 60. [PMID: 1394588] [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: 12/26/2022]
Abstract
167 sputum specimens collected from patients with pulmonary infection were tested by IFA (Indirect immunofluorescent antibody-staining) with serogroup-specific monoclonal antibody to Pseudomonas aeruginosa, compared with quantitative sputum culture. The results showed the minimum concentration of bacteria detectable by IFA was 10 cfu/ml. 31(86.1%) were positive in 36 specimens with more than 10 cfu/ml of Pseudomonas aeruginosa. 22(100%) were positive in 22 specimens with more than 10 cfu/ml of Pseudomonas aeruginosa. In 127 specimens with a negative culture for Pseudomonas aeruginosa, 121(95.2%) were negative, 6(4.8%) were false-positive which could be identified by Gram's-staining. The type of Pseudomonas aeruginosa could also be identified within 3 hours.
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Affiliation(s)
- Y C Tang
- 3rd Affiliated Hospital, Sun Yat-Sen
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29
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Abstract
The relations of serum zinc (Zn) and copper (Cu) to serum total cholesterol (TC), low-density-lipoprotein and high-density-lipoprotein cholesterol (LDL-C and HDL-C) and triglycerides were investigated in a population-based sample of 399 men in Southern China. Serum Cu was inversely related to HDL-C (r = -0.21), while Zn/Cu ratio showed a positive association (r = 0.19). These relationships remained significant after adjusting for age, body mass index (kg/m2), physical activity, tobacco smoking and dietary cholesterol, fat, and fiber. While no significant association was observed between serum Cu and serum TC in univariate analysis, a significant negative association was observed in multivariate analysis, after adjustment for the above mentioned independent variables. No significant association between serum Cu and LDL-C was found. These observations, as well as those reported in other studies reviewed herein, suggest that Cu is implicated in the metabolism of HDL-C, although the mechanism involved is not fully understood. No significant associations were found between serum Zn and the lipid variables.
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Affiliation(s)
- J A He
- Peking Union Medical College, Beijing, People's Republic of China
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30
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Kaneko T, LeMere M, Tang YC. Approximate treatment of the nucleon-nucleus interaction in the resonating-group formulation. Phys Rev C Nucl Phys 1991; 44:1588-1600. [PMID: 9967564 DOI: 10.1103/physrevc.44.1588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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31
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Liu QK, Tang YC, Kanada H. Approximate treatment of antisymmetrization in the microscopic studies of p+ alpha and 3He+ alpha bremsstrahlung. Phys Rev C Nucl Phys 1991; 44:1695-1697. [PMID: 9967580 DOI: 10.1103/physrevc.44.1695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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32
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Abstract
The Yi People Study was conducted in Puge County, Sichuan Province, People's Republic of China. Four population groups were surveyed for risk factors for cardiovascular disease. Included were two groups of Yi farmers living either in a high mountainous area in extremely remote villages at or above 2,750 meters elevation, or in a mountainside area at about 1,800 meters elevation. A third study group consisted of Yi farmers who migrated to the county seat during the 1950s. Local residents of the county seat, the Han people, constituted the fourth group. Blood pressure rises very little with age after puberty in Yi farmers, but there was a trend of increasing blood pressure with age in Yi migrants and Han. Mean body mass index (kg/m2) and heart rate were higher in Yi migrants than in Yi farmers. For men, both systolic and diastolic blood pressure were greater among Yi migrants than among Yi farmers. These differences persisted after adjusting for age and body mass index. Among women, after adjusting for age, BMI, and altitude, only diastolic blood pressure was lower among Yi farmers than Yi migrants. Yi migrants and Han had similar blood pressures. In 1986, a sample of men participated in more detailed studies of diet, serum, and urine. The proportion of energy from fat ranged from less than 10% among high-mountain Yi farmers to almost 40% among Yi migrants and Han. Compared with Yi farmers, Yi migrants consumed more sodium and less potassium, calcium, and magnesium, had lower serum potassium, and a greater sodium/potassium ratio. Urinary excretion of sodium, calcium, and the sodium/potassium ratio were all greater in Yi migrants than in Yi farmers, while the reverse was seen for potassium. These data suggest that changes in life-style, including dietary changes, contribute importantly to the higher blood pressure among Yi migrants.
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Affiliation(s)
- J He
- Peking Union Medical College, Beijing, People's Republic of China
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Abstract
The relations of sodium, potassium, calcium, and magnesium to blood pressure were investigated in four groups of men (119 high-mountain Yi farmers, 114 mountainside Yi farmers, 89 Yi migrants, and 97 Han people) with a wide range of electrolyte intake in Puge County, Sichuan Province, People's Republic of China. Electrolytes were measured in diet, serum, and urine. Sodium excretion was 73.9 mmol/24 hr in high-mountain Yi farmers, 117.9 mmol/24 hr in mountainside Yi farmers, 159.4 mmol/24 hr in Yi migrants, and 186.0 mmol/24 hr in the Han people. In ecological correlation analysis, dietary and urinary sodium were significantly and positively correlated with both systolic and diastolic pressure, whereas serum sodium showed no relation with blood pressure. In diet, serum, and urine, potassium was negatively related to systolic and diastolic pressure, whereas the sodium/potassium ratio showed a positive association. With regard to calcium, only urinary excretion was significantly and positively related to blood pressure. No relation was found between magnesium and blood pressure. Analyses at the individual level confirmed the results for sodium and potassium seen at the ecological level, but in addition, dietary calcium and magnesium were significantly and negatively correlated to both systolic and diastolic pressure, and urinary magnesium was inversely related to diastolic pressure. These relations persisted after controlling for age, body mass index (kg/m2), heart rate, alcohol, and total energy intake in multiple regression analysis performed separately for electrolytes in diet, serum, and urine. In multiple regression analysis, an increase in sodium intake of 100 mmol/day corresponded to an increase of 2.3 mm Hg systolic blood pressure and 1/8 mm Hg diastolic pressure.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- J He
- Peking Union Medical College, Beijing, People's Republic of China
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Abstract
Chromosome abnormalities with recognizable clinical manifestations including mental retardation, primary infertility or primary amenorrhea of unknown etiology, abnormal sex differentiation and abnormal sex development were surveyed in the general population of Sichuan. The results showed that the prevalence of chromosome diseases in Sichuan was 31.5 per 100,000 of the general population with almost equal frequencies for autosomal chromosome and sex chromosome diseases. The most frequent autosomal chromosome disease was Down syndrome. The prevalence was 14.2 per 100,000 for the total population, and there should therefore be 154,000 cases of Down syndrome in the whole of China with its population of 1,100 million people. The most frequent sex chromosome diseases were Turner syndrome and Klinefelter syndrome. The prevalences were 14.3 and 14.1 per 100,000 for females and males, respectively. The majority of autosomal chromosome diseases clustered in the younger age groups, while the highest detection rate of sex chromosome diseases was found in the age group of 25-35, and thereafter it decreased with age. The age distribution of the cases indicates that both autosomal and sex chromosome diseases reduce the lifespan of patients.
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Affiliation(s)
- S Z Zhang
- Department of Medical Genetics, West China University of Medical Sciences, Chengdu
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Kanada H, Kaneko T, Tang YC. Reaction cross sections in the four-nucleon system with the multiconfiguration resonating-group method. Phys Rev C Nucl Phys 1991; 43:371-378. [PMID: 9967083 DOI: 10.1103/physrevc.43.371] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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36
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Fujiwara Y, Tang YC. Multiconfiguration resonating-group study of the six-nucleon system with cluster-rearrangement and pseudo-inelastic configurations. Phys Rev C Nucl Phys 1991; 43:96-104. [PMID: 9967050 DOI: 10.1103/physrevc.43.96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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37
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Liu QK, Tang YC, Kanada H. Microscopic study of p+ alpha bremsstrahlung. Phys Rev C Nucl Phys 1990; 42:1895-1898. [PMID: 9966935 DOI: 10.1103/physrevc.42.1895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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38
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Liu QK, Tang YC, Kanada H. Erratum: Microscopic calculation of bremsstrahlung emission in 3He+ alpha collisions. Phys Rev C Nucl Phys 1990; 42:1160. [PMID: 9966842 DOI: 10.1103/physrevc.42.1160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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39
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Liu QK, Tang YC, Kanada H. Microscopic calculation of bremsstrahlung emission in 3He+ alpha collisions. Phys Rev C Nucl Phys 1990; 41:1401-1416. [PMID: 9966489 DOI: 10.1103/physrevc.41.1401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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40
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Abstract
A 12-year-old boy with a history of a mewing cry after birth, severe mental retardation, Marfanoid arachnodactyly, general osteomalacia and multiple bone fractures was found to have a de novo 5p;12q chromosomal translocation. The karyotype is 46,XY,t(5;12)(12qter----12q24.1::5p15----cen----5qt er; 12pter----cen----12q24.1). The karyotypes of other examined family members are normal. The manifestations of cri du chat syndrome are explained by the loss of a small segment of 5p15 which is responsible for the major stigmata of the syndrome, and the abnormalities of the osseous system may be the results of untreated vitamin D resistant rickets.
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Affiliation(s)
- S Z Zhang
- Department of Medical Genetics, West China University of Medical Sciences, Chengdu
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41
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42
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LeMere M, Tang YC. Knockon exchange contribution in the resonating-group study of the nucleus-nucleus interaction. Phys Rev C Nucl Phys 1989; 39:1696-1700. [PMID: 9955388 DOI: 10.1103/physrevc.39.1696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
The relation between blood pressure and urinary electrolytes, including sodium, potassium, calcium, and magnesium were examined in male farmers of the Yi nationality who live in three separate communities in Sichuan and Yunnan provinces in China, where the lifestyles, habits, and living conditions are very different. One of these three communities was unacculturated and had the lowest average blood pressure as well as the lowest prevalence rate of hypertension in China; one was acculturated and had the highest average blood pressure; and the third was moderately acculturated with its average blood pressure between the other two. Blood pressure was taken on each of 3 days and corresponding 24-hour urine specimens were collected to measure potassium, sodium, calcium, magnesium, urea nitrogen, and creatinine. Ecological and individual-based data correlation analyses were employed to study the relations among age, body mass index, some related indexes of electrolyte derivatives, and blood pressure. Multiple regression analyses were used to explore the relation of blood pressure to the above indexes, adjusted for age, body mass index, urea nitrogen and creatinine, and geographical differences. Statistically significant correlation analyses showed that systolic blood pressure was positively associated with sodium-creatinine, calcium-creatinine, sodium-potassium, calcium-magnesium, and urea nitrogen and creatinine ratios; negatively associated with potassium-creatinine and magnesium-creatinine ratios. The ridge regression analysis selected only calcium-magnesium ratio as a predictor of systolic blood pressure.
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Affiliation(s)
- S H Lai
- Department of Oncology, University of Miami School of Medicine, Florida
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Kanada H, Kaneko T, Tang YC. Convergence features in the pseudostate theory of the d+ alpha system. Phys Rev C Nucl Phys 1988; 38:2013-2018. [PMID: 9955022 DOI: 10.1103/physrevc.38.2013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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45
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Fujiwara Y, Liu QK, Tang YC. Multiconfiguration resonating-group study of scattering and reaction cross sections in the seven-nucleon system. Phys Rev C Nucl Phys 1988; 38:1531-1536. [PMID: 9954964 DOI: 10.1103/physrevc.38.1531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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46
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LeMere M, Tang YC. Influence of target clustering on exchange effects in internuclear interaction. Phys Rev C Nucl Phys 1988; 37:1369-1375. [PMID: 9954587 DOI: 10.1103/physrevc.37.1369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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47
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Shen PN, Tang YC. Erratum: Effects of center-of-mass motion in the resonating-group theory of n. Phys Rev C Nucl Phys 1987; 36:1220. [PMID: 9971942 DOI: 10.1103/physrevc.36.1220.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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48
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Tang YC. [Diagnosis and treatment of Legionnaires' disease from opportunistic infection]. Zhonghua Jie He He Hu Xi Za Zhi 1987; 10:193-4, 253. [PMID: 3440298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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49
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Tang YC. [Assay of the decoction of Chinese materia medica with the saccharometer]. Zhong Yao Tong Bao 1987; 12:24-6,63. [PMID: 3442911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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50
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Shen PN, Tang YC. Effects of center-of-mass motion in the resonating-group theory of romann+ alpha scattering. Phys Rev C Nucl Phys 1987; 35:1985-1990. [PMID: 9953993 DOI: 10.1103/physrevc.35.1985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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