1.Nipah virus: Phylogeny and replication
Li-Yen Chang ; Sazaly AbuBakar
Neurology Asia 2009;14(1):63-66
Phylogenetic analysis of Nipah virus isolates from Malaysia, Bangladesh and Cambodia suggested the
presence of at least two different clusters of NiV strains. Based on the major glycoprotein (G) gene,
the Nipah virus-Tambun isolate clustered with Nipah virus isolates from Cambodia and Bangladesh,
whereas the remaining isolates from Malaysia clustered in a separate cluster. Sequence heterogeneity
among the Nipah virus isolates from Malaysia was noted but the overall genomic sequence divergence
value was small, suggesting a possible recent introduction of the virus. Nipah virus replicated well
in porcine stable kidney cells and human lung fibroblast cells. Human monocytes, on the other hand
were infected with Nipah virus but the cells did not support productive infection. Similarly, infection
of human neuronal cells did not result in release of high infectious virus yield. The monocytes can
serve to disseminate Nipah virus from site of infection including across the blood-brain barrier. And
in the brain, Nipah virus is probably spread through cell-to-cell spread mechanism.
2.Antigenic cell associated dengue 2 virus proteins detected in vitro using dengue fever patients sera.
Sazaly Abubakar ; Azmi Azila ; Misbah Suzana ; Li-Yen Chang
The Malaysian journal of pathology 2002;24(1):29-36
At least three major antigenic dengue 2 virus proteins were recognized by pooled dengue fever patients' sera in infected Aedes albopictus (C6/36) mosquito cells. Dengue virus envelope (E), premembrane (PrM) and non-structural protein 1 (NS 1) dimer were detected beginning on day 3 postinfection in both the cell membrane and cytosolic fractions. Using the patients' sera, the presence of antigenic intermediate core protein (C)-PrM and NS1-non-structural protein 2a (NS2a) in the cytoplasmic fraction of dengue 2 virus infected cells was revealed. The presence of a approximately 92 and approximately 84 kDa NS 1 dimer in the membrane (NS 1m) and cytosolic (NS 1c) fractions of C6/36 cells, respectively, was also recognized. Using individual patient's serum, it was further confirmed that all patients' sera contained antibodies that specifically recognized E, NS 1 and PrM present in the dengue 2 virus-infected cell membrane fractions, suggesting that these glycosylated virus proteins were the main antigenic proteins recognized in vivo. Detection of dengue 2 virus C antibody in some patients further suggested that C could be antigenic if presented in vivo.
Dengue
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seconds
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Viral Proteins
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Proteins
;
Carbon ion
3.Late-onset Nipah virus encephalitis 11 years after the initial outbreak: A case report
Suhailah Abdullah ; Li-Yen Chang ; Kartini Rahmat ; Khean Jin Goh ; Chong Tin Tan
Neurology Asia 2012;17(1):71-74
Nipah virus infection is known to cause late-onset and relapsed encephalitis, in addition to an acute
encephalitic illness. This is a report of a 35 years old woman, who had exposure to the Nipah virus
infection during the 1999 Malaysian outbreak, was positive for Nipah IgG by immunofl uorescence, and
had multiple small hyperintense lesions in brain MRI typically seen in acute Nipah encephalitis patients,
indicating asymptomatic Nipah virus infection. She subsequently developed acute encephalitis after
11 years, manifesting as diplopia, internuclear opthalmoplegia and epileptic seizures with pleocytosis
in cerebrospinal fl uid examination. She had another episode of relapsed encephalitis a year later, with
seizures, memory impairment, chorea and new lesions in MRI brain. This patient is unusual in the
long incubation of 11 years before manifesting with late-onset Nipah encephalitis.
4.The Role of Consolidation Chemoradiotherapy in Locally Advanced Pancreatic Cancer Receiving Chemotherapy: An Updated Systematic Review and Meta-Analysis.
Jeffrey S CHANG ; Yen Feng CHIU ; Jih Chang YU ; Li Tzong CHEN ; Hui Ju CH'ANG
Cancer Research and Treatment 2018;50(2):562-574
PURPOSE: The role of consolidation chemoradiation (CCRT) after systemic chemotherapy in locally advanced pancreatic cancer (LAPC) is still controversial. We aim to evaluate the effectiveness of CCRT in LAPC using systematic review and meta-analysis of prospective studies. MATERIALS AND METHODS: Prospective clinical trials of LAPC receiving chemotherapy with or without subsequent CCRT were included in the analysis. We systematically searched in PubMed, MEDLINE, Embase, and Web of Science. The primary outcome of interest was 1-year survival. Secondary end-points were median overall survival, progression-free survival, toxicity, and resection rate. RESULTS: Forty-one studies with 49 study arms were included with a total of 1,018 patients receiving CCRT after induction chemotherapy (ICT) and 954 patients receiving chemotherapy alone. CCRT after ICT did not improve 1-year survival significantly in LAPC patients compared with chemotherapy alone (58% vs. 52%). ICT lasted for at least 3 months revealed significantly improved survival of additional CCRT to LAPC patients compared to chemotherapy alone (65% vs. 52%). A marginal survival benefit of consolidation CCRT was noted in studies using maintenance chemotherapy (59% vs. 52%), and fluorouracil-based CCRT (64% vs. 52%), as well as in studies conducted after the 2010 (64% vs. 55%). CONCLUSION: The survival benefit of ICT+CCRT over chemotherapy alone in treating LAPC was noted when ICT lasted for at least 3 months. Fluorouracil-based CCRT, and maintenance chemotherapy were associated with improved clinical outcomes.
Adenocarcinoma
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Arm
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Chemoradiotherapy*
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Disease-Free Survival
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Drug Therapy*
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Humans
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Induction Chemotherapy
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Maintenance Chemotherapy
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Pancreatic Neoplasms*
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Prospective Studies
5.An Interpretative Study on Nurses' Perspectives of Working in an Overcrowded Emergency Department in Taiwan.
Li Chin CHEN ; Chun Chih LIN ; Chin Yen HAN ; Chun Lan HSIEH ; Chiung Jung (JO) WU ; Hwey Fang LIANG
Asian Nursing Research 2018;12(1):62-68
PURPOSE: This study aims to gain in-depth understanding of nurses' perspectives of working in an overcrowded emergency. METHODS: Symbolic interactionism and Charmaz's construction of grounded theory were used. Purposive sampling at the start of the study and a further theoretical sampling by snowball technique were used to recruit 40 registered nurses (RN) to participate in in-depth, semi-structured interviews betweenMay and November, 2014. Data analysis included analytic techniques of initial, focused and theoretical coding. RESULTS: Study findings showed searching for work role is derived by the themes of Finding the role of positioning in Emergency Department (ED), Recognizing causes of ED overcrowding, and Confined working environment. Nurses' work experience which represents the RNs not gained control over their work, as care actions influenced by the problematic overcrowded circumstance of the ED environment. CONCLUSION: The findings fill a gap in knowledge about how RNs experience their work role in the context of an overcrowded Emergency Department in Taiwan. Arising from the study result include taking account of nurses' perspectives when planning staff/patient ratios, strategies to reduce waiting time and ensure that clients receive appropriate care.
Clinical Coding
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Crowding
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Emergencies*
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Emergency Service, Hospital*
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Grounded Theory
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Humans
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Nurses
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Statistics as Topic
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Taiwan*
6.Association between Statin Use and Clinical Outcomes in Patients with De Novo Metastatic Prostate Cancer: A Propensity Score-weighted Analysis
Tzu Shuang CHEN ; Hui Ying LIU ; Yin Lun CHANG ; Yao Chi CHUANG ; Yen Ta CHEN ; Yu Li SU ; Chun Chieh HUANG ; Yen Ting WU ; Hung Jen WANG ; Hao Lun LUO
The World Journal of Men's Health 2024;42(3):630-637
Purpose:
Numerous studies have produced conflicting findings regarding the efficacy of statins in prostate cancer treatment. Our objective was to examine the correlation between statin usage and clinical outcomes in Taiwanese men with de novo metastatic prostate cancer.
Materials and Methods:
We identified patients diagnosed with de novo metastatic prostate cancer from the Chang Gung Research Database spanning the years 2007 to 2020. To minimize confounding bias, we employed the inverse probability of treatment weighting (IPTW) method. Clinical outcomes were assessed using IPTW-adjusted Kaplan-Meier curves. Multivariate Cox proportional hazard regression analysis was utilized to evaluate the association between mortality and clinical factors.
Results:
The study cohort comprised 1,716 statin users and 276 non-users. Patients who used statins exhibited a longer median overall survival (85.4 months compared to 58.2 months; p=0.001) and cancer-specific survival (112.6 months compared to 75.7 months; p<0.001) compared to non-users. The median time to the development of castration-resistant status was similar between statin users and non-users (p=0.069). Multivariable Cox proportional hazards regression analysis, after IPTW adjustment, demonstrated that statin use was associated with improved overall survival.
Conclusions
Our study indicates that the use of statins following a de novo metastatic prostate cancer diagnosis enhances survival outcomes. However, statins did not appear to delay the onset of castration-resistant status. Further large-scale and long-term studies are warranted to investigate the biological effects of statins in men with prostate cancer.
7.Is Bladder Training by Clamping Before Removal Necessary for Short-Term Indwelling Urinary Catheter Inpatient? A Systematic Review and Meta-analysis.
Li Hsiang WANG ; Ming Fen TSAI ; Chin Yen Stacey HAN ; Yi Chi HUANG ; Hsueh Erh LIU
Asian Nursing Research 2016;10(3):173-181
PURPOSE: Urinary catheterization is a common technique in clinical practice. There is, however, no consensus on management prior to removal of the indwelling catheter for short-term patients. This systematic review examined the necessity of clamping before removal of an indwelling urinary catheter in short-term patients. METHODS: A systematic literature review was conducted using eight databases and predetermined keywords-guided searches. Some 2,515 studies were evaluated. Ten studies that met the inclusion criteria were selected. RESULTS: The quality of the studies was assessed using the Jadad scoring system. Only 40.0% of studies were rated as high quality. This review found that catheter clamping prior to removal was not necessary for the short-term patient. When made a comparison with the unclamping group, there was no significant difference in recatheterization risk, risk of urine retention, patients' subjective perceptions and rate of urinary tract infection. CONCLUSIONS: This review indicated that bladder training by clamping prior to removal of urinary catheters is not necessary in short-term catheter patients. In addition, clamping carries the risk of complications such as prolonging urinary catheter retention and urinary tract injury. Further investigation requires higher quality methodologies and more diverse study designs.
Attitude to Health
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Catheters, Indwelling
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Constriction
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Device Removal
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Humans
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Patient Education as Topic/methods
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Perception
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Randomized Controlled Trials as Topic
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Retreatment
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Urinary Catheterization/*methods
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Urinary Catheters
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Urinary Retention/psychology
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Urinary Tract Infections/therapy
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Urination/physiology
8.Dextromethorphan Protect the Valproic Acid Induced Downregulation of Neutrophils in Patients with Bipolar Disorder
Ru-Band LU ; Yun-Hsuan CHANG ; Sheng-Yu LEE ; Tzu-Yun WANG ; Shu-Li CHENG ; Po-See CHEN ; Yen-Kuang YANG ; Jau-Shyong HONG ; Shiou-Lan CHEN
Clinical Psychopharmacology and Neuroscience 2020;18(1):145-152
Objective:
Valproic acid (VPA) is an anticonvulsant and commonly long term used as a mood stabilizer for patients with mood disorders. However its chronic effects on the hematological changes were noticed and need to be further evaluated. In this study, we evaluated, in Taiwanese Han Chinese patients with bipolar disorders (BD), the chronic effects of VPA or VPA plus dextromethorphan (DM) on the hematological molecules (white blood cell [WBCs], red blood cells [RBCs], hemoglobin, hematocrit, and platelets).
Methods:
In a 12-week, randomized, double-blind study, we randomly assigned BD patients to one of three groups: VPA plus either placebo (VPA+P, n = 57) or DM (30 mg/day, VPA+DM30, n = 56) or 60 mg/day (VPA+DM60, n = 53). The Young Mania Rating Scale and Hamilton Depression Rating Scale were used to evaluate symptom severity, and the hematological molecules were checked.
Results:
Paired t test showed that the WBC, neutrophils, platelets and RBCs were significantly lowered after 12 weeks of VPA+P or VPA+DM30 treatment. VPA+DM60 represented the protective effects in the WBCs, neutrophils, and RBCs but not in the platelets. We further calculated the changes of each hematological molecules after 12 weeks treatment. We found that combination use of DM60 significantly improved the decline in neutrophils induced by the long-term VPA treatment.
Conclusion
Hematological molecule levels were lower after long-term treatment with VPA. VPA+DM60, which yielded the protective effect in hematological change, especially in the neutrophil counts. Thus, DM might be adjunct therapy for maintaining hematological molecules in VPA treatment.
9.Taiwan Association for the Study of the Liver-Taiwan Society of Cardiology Taiwan position statement for the management of metabolic dysfunction- associated fatty liver disease and cardiovascular diseases
Pin-Nan CHENG ; Wen-Jone CHEN ; Charles Jia-Yin HOU ; Chih-Lin LIN ; Ming-Ling CHANG ; Chia-Chi WANG ; Wei-Ting CHANG ; Chao-Yung WANG ; Chun-Yen LIN ; Chung-Lieh HUNG ; Cheng-Yuan PENG ; Ming-Lung YU ; Ting-Hsing CHAO ; Jee-Fu HUANG ; Yi-Hsiang HUANG ; Chi-Yi CHEN ; Chern-En CHIANG ; Han-Chieh LIN ; Yi-Heng LI ; Tsung-Hsien LIN ; Jia-Horng KAO ; Tzung-Dau WANG ; Ping-Yen LIU ; Yen-Wen WU ; Chun-Jen LIU
Clinical and Molecular Hepatology 2024;30(1):16-36
Metabolic dysfunction-associated fatty liver disease (MAFLD) is an increasingly common liver disease worldwide. MAFLD is diagnosed based on the presence of steatosis on images, histological findings, or serum marker levels as well as the presence of at least one of the three metabolic features: overweight/obesity, type 2 diabetes mellitus, and metabolic risk factors. MAFLD is not only a liver disease but also a factor contributing to or related to cardiovascular diseases (CVD), which is the major etiology responsible for morbidity and mortality in patients with MAFLD. Hence, understanding the association between MAFLD and CVD, surveillance and risk stratification of MAFLD in patients with CVD, and assessment of the current status of MAFLD management are urgent requirements for both hepatologists and cardiologists. This Taiwan position statement reviews the literature and provides suggestions regarding the epidemiology, etiology, risk factors, risk stratification, nonpharmacological interventions, and potential drug treatments of MAFLD, focusing on its association with CVD.
10.Risk factor analysis of coexisting endometrial carcinoma in patients with endometrial hyperplasia: a retrospective observational study of Taiwanese Gynecologic Oncology Group.
Yu Li CHEN ; Kung Liahng WANG ; Min Yu CHEN ; Mu Hsien YU ; Chen Hsuan WU ; Yu Min KE ; Yi Jen CHEN ; Yin Yi CHANG ; Keng Fu HSU ; Ming Shyen YEN
Journal of Gynecologic Oncology 2013;24(1):14-20
OBJECTIVE: To evaluate the clinical outcome and parameters related to coexisting endometrial carcinoma in women with tissue-diagnosed endometrial hyperplasia. METHODS: Between January 1991 and December 2009, three hundred and eighty-six patients with the presumptive diagnosis of endometrial hyperplasia were retrieved. Among these, one hundred and twenty-five patients were identified as having coexisting endometrial carcinoma in hysterectomy specimens. The three hundred and eighty-six patients were divided into two groups: the hyperplasia-benign group (261 cases) and the hyperplasia-malignant group (125 cases). Several clinical parameters including age, menopausal status, history of abnormal uterine bleeding, obstetrical history, medical history of diabetes and hypertension, BMI, and preoperative pathologic results were investigated. RESULTS: Age > or =53 (odds ratio [OR], 2.40; 95% confidence interval [CI], 1.26 to 4.57), menopausal status (OR, 2.07; 95% CI, 1.14 to 3.76), diabetes history (OR, 7.33; 95% CI, 2.79 to 19.26), abnormal uterine bleeding (OR, 3.99; 95% CI, 1.22 to 13.02), atypical endometrial hyperplasia (OR, 7.38; 95% CI, 4.03 to 13.49), and body mass index > or =27 (OR, 3.24; 95% CI, 1.76 to 5.97) were independent risk factors for prediction of endometrial hyperplasia coexisting with endometrial carcinoma. The diagnostic efficacy of atypical endometrial hyperplasia to predict the endometrial hyperplasia coexisting with endometrial carcinoma was better than or similar to those of other independent factors and combinations of these factors. CONCLUSION: Coexisting malignancy should be considered when examining endometrial hyperplasia patients with the related risk factors, especially atypical endometrial hyperplasia.
Body Mass Index
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Endometrial Hyperplasia
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Endometrial Neoplasms
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Female
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Humans
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Hypertension
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Hysterectomy
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Retrospective Studies
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Risk Factors
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Uterine Hemorrhage