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Hsieh PH, Yang TC, Kang EYN, Lee PC, Luo JC, Huang YH, Hou MC, Huang SP. Impact of nutritional support routes on mortality in acute pancreatitis: A network meta-analysis of randomized controlled trials. J Intern Med 2024. [PMID: 38561603 DOI: 10.1111/joim.13782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
BACKGROUND Nutritional administration in acute pancreatitis (AP) management has sparked widespread discussion, yet contradictory mortality results across meta-analyses necessitate clarification. The optimal nutritional route in AP remains uncertain. Therefore, this study aimed to compare mortality among nutritional administration routes in patients with AP using consistency model. METHODS This study searched four major databases for relevant randomized controlled trials (RCTs). Two authors independently extracted and checked data and quality. Network meta-analysis was conducted for estimating risk ratios (RRs) with 95% confidence interval (CI) based on random-effects model. Subgroup analyses accounted for AP severity and nutrition support initiation. RESULTS A meticulous search yielded 1185 references, with 30 records meeting inclusion criteria from 27 RCTs (n = 1594). Pooled analyses showed the mortality risk reduction associated with nasogastric (NG) (RR = 0.34; 95%CI: 0.16-0.73) and nasojejunal (NJ) feeding (RR = 0.46; 95%CI: 0.25-0.84) in comparison to nil per os. Similarly, NG (RR = 0.45; 95%CI: 0.24-0.83) and NJ (RR = 0.60; 95%CI: 0.40-0.90) feeding also showed lower mortality risk than total parenteral nutrition. Subgroup analyses, stratified by severity, supported these findings. Notably, the timing of nutritional support initiation emerged as a significant factor, with NJ feeding demonstrating notable mortality reduction within 24 and 48 h, particularly in severe cases. CONCLUSION For severe AP, both NG and NJ feeding appear optimal, with variations in initiation timings. NG feeding does not appear to merit recommendation within the initial 24 h, whereas NJ feeding is advisable within the corresponding timeframe following admission. These findings offer valuable insights for optimizing nutritional interventions in AP.
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Affiliation(s)
- Ping-Han Hsieh
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Tsung-Chieh Yang
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Enoch Yi-No Kang
- Evidence-Based Medicine Center, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
- Institute of Health Policy and Management, College of Public Health, National Taiwan University, Taipei, Taiwan
- Cochrane Taiwan, Taipei Medical University, Taipei, Taiwan
| | - Pei-Chang Lee
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Jiing-Chyuan Luo
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Yi-Hsiang Huang
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Healthcare and Services Center, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Ming-Chih Hou
- Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
- School of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Shih-Ping Huang
- Division of Gastroenterology, Department of Internal Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan
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Lo TY, Chang JY, Wei TZ, Chen PY, Huang SP, Tsai WT, Liou CY, Lin CC, Mao SG. GPS-Free Wireless Precise Positioning System for Automatic Flying and Landing Application of Shipborne Unmanned Aerial Vehicle. Sensors (Basel) 2024; 24:550. [PMID: 38257642 PMCID: PMC10821099 DOI: 10.3390/s24020550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024]
Abstract
This research is dedicated to developing an automatic landing system for shipborne unmanned aerial vehicles (UAVs) based on wireless precise positioning technology. The application scenario is practical for specific challenging and complex environmental conditions, such as the Global Positioning System (GPS) being disabled during wartime. The primary objective is to establish a precise and real-time dynamic wireless positioning system, ensuring that the UAV can autonomously land on the shipborne platform without relying on GPS. This work addresses several key aspects, including the implementation of an ultra-wideband (UWB) circuit module with a specific antenna design and RF front-end chip to enhance wireless signal reception. These modules play a crucial role in achieving accurate positioning, mitigating the limitations caused by GPS inaccuracy, thereby enhancing the overall performance and reception range of the system. Additionally, the study develops a wireless positioning algorithm to validate the effectiveness of automatic landing on the shipborne platform. The platform's wave vibration is considered to provide a realistic landing system for shipborne UAVs. The UWB modules are practically installed on the shipborne platform, and the UAV and the autonomous three-body vessel are tested simultaneously in the outdoor open water space to verify the functionality, precision, and adaptability of the proposed UAV landing system. Results demonstrate that the UAV can autonomously fly from 200 m, approach, and automatically land on the moving shipborne platform without relying on GPS.
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Affiliation(s)
- Tsu-Yu Lo
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Je-Yao Chang
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Tan-Zhi Wei
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Pin-Yen Chen
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Shih-Ping Huang
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Wei-Ting Tsai
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Chong-Yi Liou
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Chun-Cheng Lin
- Department of Power Vehicle and Systems Engineering, Chung Cheng Institute of Technology, National Defense University, Taoyuan 335, Taiwan
| | - Shau-Gang Mao
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
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Huang SP, Chen CB, Wei TZ, Tsai WT, Liou CY, Mao YM, Sheng WH, Mao SG. Range-Extension Algorithms and Strategies for TDOA Ultra-Wideband Positioning System. Sensors (Basel) 2023; 23:3088. [PMID: 36991800 PMCID: PMC10053965 DOI: 10.3390/s23063088] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/07/2023] [Accepted: 03/07/2023] [Indexed: 06/19/2023]
Abstract
The Internet of Things (IoT) for smart industry requires the surveillance and management of people and objects. The ultra-wideband positioning system is an attractive solution for achieving centimeter-level accuracy in target location. While many studies have focused on improving the accuracy of the anchor coverage range, it is important to note that in practical applications, positioning areas are often limited and obstructed by furniture, shelves, pillars, or walls, which can restrict the placement of anchors. Furthermore, some positioning regions are located beyond anchor coverage, and a single group with few anchors may not be able to cover all rooms and aisles on a floor due to non-line-of-sight errors causing severe positioning errors. In this work, we propose a dynamic-reference anchor time difference of arrival (TDOA) compensation algorithm to enhance accuracy beyond anchor coverage by eliminating local minima of the TDOA loss function near anchors. We designed a multidimensional and multigroup TDOA positioning system with the aim of broadening the coverage of indoor positioning and accommodating complex indoor environments. By employing an address-filter technique and group-switching process, tags can seamlessly move between groups with a high positioning rate, low latency, and high accuracy. We deployed the system in a medical center to locate and manage researchers with infectious medical waste, demonstrating its usefulness for practical healthcare institutions. Our proposed positioning system can thus facilitate precise and wide-range indoor and outdoor wireless localization.
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Affiliation(s)
- Shih-Ping Huang
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Chien-Bang Chen
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Tan-Zhi Wei
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Wei-Ting Tsai
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Chong-Yi Liou
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
| | - Yuan-Mou Mao
- School of Medicine, National Taiwan University, Taipei 106, Taiwan
| | - Wang-Huei Sheng
- School of Medicine, National Taiwan University, Taipei 106, Taiwan
| | - Shau-Gang Mao
- Graduate Institute of Commutation Engineering, National Taiwan University, Taipei 106, Taiwan
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Chen CB, Lo TY, Chang JY, Huang SP, Tsai WT, Liou CY, Mao SG. Precision Enhancement of Wireless Localization System Using Passive DOA Multiple Sensor Network for Moving Target. Sensors (Basel) 2022; 22:7563. [PMID: 36236662 PMCID: PMC9573632 DOI: 10.3390/s22197563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 09/26/2022] [Accepted: 09/26/2022] [Indexed: 06/16/2023]
Abstract
Determining the direction-of-arrival (DOA) of any signal of interest has long been of great interest to the wireless localization research community for military and civilian applications. To efficiently facilitate the deployment of DOA systems, the accuracy of wireless localization is critical. Hence, this paper proposes a novel method to improve the prediction result of a wireless DOA localization system. By considering the signal variation existing in the complex environment, the actual location of the target can be determined including the maximum prediction error. Moreover, the scenario of the moving target is further investigated by incorporating the adaptive Kalman Filter algorithm to obtain the prediction route of the flying drone based on the accuracy assessment method. This proposed adaptive Kalman Filter is a high-efficiency algorithm that can filter out the noise in the multipath area and optimize the predicted data in real-time. The simulation result agrees well with the measured data and thus validates the proposed DOA system with the adaptive Kalman Filter algorithm. The measured DOA of the fixed radiation source obtained by a single base station and the moving route of a flying drone from a two-base station localization system are presented and compared with the calculated results. Results show that the prediction error in an outdoor region of 500×500 m2 is about 10−20 m, which demonstrate the usefulness of the proposed wireless DOA system deployment in practical applications.
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Huang SP, Zhou HW, Li D, Hu MR, Qin C. A GIANT NON-FUNCTIONAL PARATHYROID CYST. Acta Endocrinol (Buchar) 2020; 16:262. [PMID: 33029247 DOI: 10.4183/aeb.2020.262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- S P Huang
- Hospital of Hangzhou Normal University, Department of Thyroid and Breast Surgery, Hangzhou, China
| | - H W Zhou
- Hospital of Hangzhou Normal University, Department of Thyroid and Breast Surgery, Hangzhou, China
| | - D Li
- Hospital of Hangzhou Normal University, Department of Thyroid and Breast Surgery, Hangzhou, China
| | - M R Hu
- Hospital of Hangzhou Normal University, Department of Thyroid and Breast Surgery, Hangzhou, China
| | - C Qin
- Hospital of Hangzhou Normal University, Department of Thyroid and Breast Surgery, Hangzhou, China
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Tang X, Zhang DD, Liu XF, Liu QP, Cao Y, Li N, Huang SP, Dou HD, Gao P, Hu YH. [Application of the China-PAR stroke risk equations in a rural northern Chinese population]. Beijing Da Xue Xue Bao Yi Xue Ban 2020; 52:444-450. [PMID: 32541976 PMCID: PMC7433436 DOI: 10.19723/j.issn.1671-167x.2020.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
OBJECTIVE To validate five-year risk prediction models for stroke in a contemporary rural Northern Chinese population. METHODS Totally 6 483 rural adults aged 40 to 79 years without cardiovascular diseases were enrolled at baseline between June and August 2010, and followed up through January 2017. Expected prediction risk using the China-PAR (prediction for atherosclerotic cardiovascular disease risk in China) stroke risk equations were compared with the new Framingham stroke risk profile (FSRP). The recalibrated models were applied by adjusting the five-year baseline survival rate and the mean score to our rural northern Chinese population, while keeping other coefficient parameters the same as the original models. Kaplan-Meier analysis was used to obtain the observed event (nonfatal or fatal stroke) rate for the five years, and the expected-observed ratios were calculated to evaluate overestimation or underestimation in the cohort. The models were assessed by discrimination C statistic, calibration χ2, and calibration charts and plots for illustration as well. RESULTS Over an average of (5.83 ± 1.14) years of the follow-up in this validation cohort with 6 483 rural Chinese participants, 438 subjects deve-loped a first stroke event. Recalibrated China-PAR stroke risk equations and FSRP well-performed for predicting five-year stroke risk in men, and had C statistics of 0.709 (95%CI, 0.675 - 0.743) and 0.721 (95%CI, 0.688 - 0.754), with calibration χ2 values being 5.7 (P = 0.770) and 13.6 (P = 0.137), respectively. However, both China-PAR and FSRP overestimated stroke events by 11.6% and 30.0% in women, and had C statistics of 0.713 (95%CI, 0.684-0.743) and 0.710 (95%CI, 0.679-0.740), respectively. Calibration χ2 values in women were 12.5 (P = 0.188) for China-PAR and 24.0 (P = 0.004) for FSRP. In addition, the calibration charts and plots illustrated good agreement between the observations and the predictions only in the China-PAR stroke risk equations, especially for men. CONCLUSION In this validation cohort of rural northern Chinese adults, the China-PAR models had better performance of five-year stroke risk prediction than the FSRP, indicating that recalibrated China-PAR stroke risk equations might be appropriate tools for risk assessment and primary prevention of stroke in China.
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Affiliation(s)
- X Tang
- Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China
| | - D D Zhang
- Cardiovascular Epidemiology Unit, Department of Public Health and Primary Care, University of Cambridge, Cambridge CB1 8RN, United Kingdom
| | - X F Liu
- Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China
| | - Q P Liu
- Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China
| | - Y Cao
- Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China
| | - N Li
- Fangshan District Center for Disease Control and Prevention, Beijing 102446, China
| | - S P Huang
- Fangshan District Center for Disease Control and Prevention, Beijing 102446, China
| | - H D Dou
- The First Hospital of Fangshan District, Beijing 102400, China
| | - P Gao
- Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China
| | - Y H Hu
- Department of Epidemiology and Biostatistics, Peking University School of Public Health, Beijing 100191, China
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Huang SP, Toh DE, Sue YM, Chen TH, Cheng SW, Cheng CY. Double filtration plasmapheresis in treatment of acute pancreatitis associated with severe hypertriglyceridemia: Three case reports. Medicine (Baltimore) 2018; 97:e12987. [PMID: 30383651 PMCID: PMC6221692 DOI: 10.1097/md.0000000000012987] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
RATIONALE Severe hypertriglyceridemia is the 3rd-leading cause of acute pancreatitis. Current treatment option for hypertriglyceridemia associated with acute pancreatitis is mainly supportive measures, including adequate fluid supply, pain management, and broad-spectrum antibiotics if necessary. Extracorporeal method by mean of plasmapheresis is effective in reducing serum level of triglyceride. It has been proposed to have therapeutic potential in limited small sample studies. PATIENT CONCERNS A retrospective review of therapeutic effect of double filtration plasmapheresis in treating hypertriglyceridemia associated with acute pancreatitis was conducted by enlisting 3 patients who meet the criteria for the present study. DIAGNOSES Three patients met the criteria for hypertriglyceridemia (serum level >800 mg/dL) associated with acute pancreatitis (either with elevated serum level of lipase and/or amylase and/or with computed tomography evidence of acute pancreatitis). INTERVENTIONS Patients received double filtration plasmapheresis. OUTCOMES We found that an effective reduction of triglyceride was achieved on an average of 84.7% as a result of a single session of plasmapheresis. All 3 of our patients survived, but needed extended hospitalization. LESSONS A substantial clinical trial is required to further assess the effectiveness of plasmapheresis in managing of acute pancreatitis in the setting of hypertriglyceridemia.
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Affiliation(s)
- Shih-Ping Huang
- Division of Gastroenterology, Department of Internal Medicine, Wan Fang Hospital
| | - Ding-Ek Toh
- Division of Gastroenterology, Department of Internal Medicine, Wan Fang Hospital
| | - Yuh-Mou Sue
- Department of Internal Medicine, School of Medicine, College of Medicine
- Division of Nephrology, Department of Internal Medicine, Wan Fang Hospital
| | - Tso-Hsiao Chen
- Department of Internal Medicine, School of Medicine, College of Medicine
- Division of Nephrology, Department of Internal Medicine, Wan Fang Hospital
| | - Sheng-Wei Cheng
- Division of Gastroenterology, Department of Internal Medicine, Wan Fang Hospital
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Chung-Yi Cheng
- Department of Internal Medicine, School of Medicine, College of Medicine
- Division of Nephrology, Department of Internal Medicine, Wan Fang Hospital
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Huang SP, Wang XY, Fang C, Wang XY, Wu Q. [Experimental observation on the effect of bone marrow mesenchymal stem cells transplanting CXCR4 over gentamicin ototoxicity]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 32:355-359. [PMID: 29798293 DOI: 10.13201/j.issn.1001-1781.2018.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Indexed: 11/12/2022]
Abstract
Objective:To observe the survival and migration ability of CXCR4-BMSCs in guinea pig cochlea with gentamycin induced sensorineural hearing loss, and to explore whether SDF-1/CXCR4 axis can mediate bone marrow mesenchymal stem cells (BMSCs) to cochlear homing.Method:BMSCs were isolated and extracted from guinea pigs. A bone marrow mesenchymal stem cell line with overexpression of CXCR4 was established. The animal model of sensorineural deafness was established by intraperitoneal injection of gentamicin[100 mg/(kg·d)]in 50 healthy guinea pigs. The successful deafness animals were randomly divided into three groups(14 rats in each group): sterilizing water group, BMSCs transplantation group and CXCR4-BMSCs transplantation group.Auditory brainstem response(ABR) were performed at 2 weeks and 4 weeks respectively after the tansplantation through cochlear tympanic pathway. The directional homing of the implanted cells in the cochlea was traced by the frozen section fluorescence of the cochlear tissue.Result:The hearing thresholds of the three groups were (91.3±5.2),(90.7±4.8)and (90.9±5.6)dB (SPL) respectively. There was no significant difference among them(P>0.05). In sterile Water group, the hearing thresholds were(89.7±6.4)dB and (89.2±6.7)dB respectively when detected on 2 and 4 weeks after transplantation. There were no significant difference(P>0.05);In BMSCs group, the hearing thresholds were (88.6±5.3)dB(SPL) on 2 weeks and (78.4±7.3)dB(SPL) on 4 weeks after transplantation. In CXCR4-BMSCs group, the hearing thresholds were(75.3±7.8)dB(SPL) on 2 weeks and (62.1±8.4)dB(SPL) on 4 weeks after transplantation. The differences were statistically significant (PThe hearing threshold was (75.3±7.8)dB (SPL) at 2 weeks after operation. The hearing enhancement was about 15 dB, the hearing threshold was (62.1±8.4)dB(SPL) at 4 weeks, the difference was statistically significant(P<0.05).Fluorescence tracing showed that the number of CXCR4-BMSCs homing cells was significantly increased, and showed a cohort like arrangement.Conclusion:The SDF-1/CXCR4 axis plays an important role in the directional homing and differentiation of the cells into the cochlea, which can improve the hearing repair ability of guinea pigs induced by gentamicin induced sensorineural deafness.
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Affiliation(s)
- S P Huang
- Department of Otorhinolaryngology, Provincial Clinical College, Fujian Medical University, Fujian Provincial Hospital, Fuzhou, 350001, China
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Wang MY, Tang X, Qin XY, Wu YQ, Li J, Gao P, Huang SP, Li N, Yang DL, Ren T, Wu T, Chen DF, Hu YH. [Progress in research of family-based cohort study on common chronic non-communicable diseases in rural population in northern China]. Zhonghua Liu Xing Bing Xue Za Zhi 2018; 39:94-97. [PMID: 29374905 DOI: 10.3760/cma.j.issn.0254-6450.2018.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Family-based cohort study is a special type of study design, in which biological samples and environmental exposure information of the member in a family are collected and related follow up is conducted. Family-based cohort study can be applied to explore the effect of genetic factors, environmental factors, gene-gene interaction, and gene-environment interaction in the etiology of complex diseases. This paper summarizes the objectives, methods and results, as well as the opportunities and challenges of the family-based cohort study on common chronic non-communicable diseases in rural population in northern China.
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Affiliation(s)
- M Y Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - X Tang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - X Y Qin
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Y Q Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - J Li
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - P Gao
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - S P Huang
- General Office, Fangshan District Center for Disease Control and Prevention, Beijing 102401, China
| | - N Li
- General Office, Fangshan District Center for Disease Control and Prevention, Beijing 102401, China
| | - D L Yang
- General Office, Fangshan District Health Bureau, Beijing 102401, China
| | - T Ren
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - T Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - D F Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Y H Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
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Zhao YH, Jia X, Wang WK, Liu T, Huang SP, Yang MY. Growth under elevated air temperature alters secondary metabolites in Robinia pseudoacacia L. seedlings in Cd- and Pb-contaminated soils. Sci Total Environ 2016; 565:586-594. [PMID: 27203519 DOI: 10.1016/j.scitotenv.2016.05.058] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 05/08/2016] [Accepted: 05/08/2016] [Indexed: 05/24/2023]
Abstract
Plant secondary metabolites play a pivotal role in growth regulation, antioxidant activity, pigment development, and other processes. As the global climate changes, increasing atmospheric temperatures and contamination of soil by heavy metals co-occur in natural ecosystems, which alters the pH of rhizosphere soil and influences the bioavailability and mobility of metals. Elevated temperatures in combination with heavy metals are expected to affect plant secondary metabolites, but this issue has not been extensively examined. Here, we investigated secondary metabolites in Robiniapseudoacacia seedlings exposed to elevated temperatures using a passive warming device in combination with Cd- and Pb-contaminated soils. Heavy metals significantly stimulated the accumulation of saponins, phenolic compounds, and flavonoids in leaves and stems; alkaloid compounds increased in leaves and decreased in stems, and condensed tannins fluctuated. Elevated temperatures, alone and in combination with Cd and Pb, caused increases in secondary metabolites in the plant tissues. Phenolic compounds showed the greatest changes among the secondary metabolites and significant interactive effects of temperature and metals were observed. These results suggest that slightly elevated temperature could enhance protective and defense mechanisms of Robinia pseudoacacia seedlings exposed to heavy metals by stimulating the production of secondary metabolites.
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Affiliation(s)
- Y H Zhao
- The School of Earth Science and Resources, Chang'an University, Xi'an 710054, PR China
| | - X Jia
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, No.126 Yanta Road, Xi'an 710054, PR China.
| | - W K Wang
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, No.126 Yanta Road, Xi'an 710054, PR China
| | - T Liu
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, No.126 Yanta Road, Xi'an 710054, PR China
| | - S P Huang
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, No.126 Yanta Road, Xi'an 710054, PR China
| | - M Y Yang
- School of Environmental Science and Engineering, Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Key Laboratory of Environmental Protection & Pollution and Remediation of Water and Soil of Shaanxi Province, Chang'an University, No.126 Yanta Road, Xi'an 710054, PR China
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Liu CC, Lee YC, Tsai VFS, Cheng KH, Wu WJ, Bao BY, Huang CN, Yeh HC, Tsai CC, Wang CJ, Huang SP. The interaction of serum testosterone levels and androgen receptor CAG repeat polymorphism on the risk of erectile dysfunction in aging Taiwanese men. Andrology 2015. [PMID: 26216079 DOI: 10.1111/andr.12068] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Testosterone has been found to play important roles in men's sexual function. However, the effects of testosterone can be modulated by androgen receptor (AR) CAG repeat polymorphism. It could also contribute to the risk of erectile dysfunction (ED). The aim of this study is to evaluate the interaction of serum testosterone levels and AR CAG repeat polymorphism on the risk of ED in aging Taiwanese men. This cross-sectional data of Taiwanese men older than 40 years were collected from a free health screening held between August 2010 and August 2011 in Kaohsiung city, Taiwan. All participants completed a health questionnaires included five-item version of the International Index of Erectile Function (IIEF-5) and the International Prostate Symptoms Score, received a detailed physical examination and provided 20 cm3 whole blood samples for biochemical and genetic evaluation. The IIEF-5 was used to evaluate ED. Serum albumin, total testosterone (TT), and sex hormone-binding globulin levels were measured. Free testosterone level was calculated. AR gene CAG repeat polymorphism was determined by direct sequencing. Finally, 478 men with the mean age of 55.7 ± 4.8 years were included. When TT levels were above 330 ng/dL, the effect of testosterone level on erectile function seemed to reach a plateau and a significantly negative correlation between AR CAG repeat length and the score of IIEF-5 was found (r = -0.119, p = 0.034). After adjusting for other covariates, the longer AR CAG repeat length was still an independent risk factor for ED in subjects with TT above 330 ng/dL (p = 0.006), but not in TT of 330 ng/dL or below. In conclusion, both serum testosterone levels and AR CAG repeat polymorphism can influence erectile function concomitantly. In subjects with normal TT concentration, those with longer AR CAG repeat lengths have a higher risk of developing ED.
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Affiliation(s)
- C C Liu
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Depratment of Urology, Pingtung Hospital, Ministry of Health and Welfare, Executive Yuan, Pingtung, Taiwan
| | - Y C Lee
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - V F S Tsai
- Department of Urology, Ten-Chan General Hospital, Taoyuan, Taiwan
| | - K H Cheng
- Division of Cardiology, Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - W J Wu
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Kaohsiung Municipal Hsiao-Kang Hospital, Kaohsiung, Taiwan
| | - B Y Bao
- Department of Pharmacy, China Medical University, Taichung, Taiwan
| | - C N Huang
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - H C Yeh
- Department of Urology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung, Taiwan
| | - C C Tsai
- Department of Urology, Kaohsiung Municipal Ta-Tung Hospital, Kaohsiung, Taiwan
| | - C J Wang
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - S P Huang
- Department of Urology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Urology, Faculty of Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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Deng TJ, Li QL, Chen XL, Huang SP, Guo TX, Mo JY, Wei JM, Hsiang T. First Report of Lasiodiplodia theobromae Associated with Stem Canker of Cassia fistula in Guangxi, South China. Plant Dis 2015; 99:288. [PMID: 30699603 DOI: 10.1094/pdis-08-14-0872-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cassia fistula, a member of the Fabaceae, known as the golden shower tree, is native to South Asia. It is now distributed worldwide and is popular as an ornamental plant as well as being used in herbal medicine. In October 2013, symptoms of stem canker were observed on C. fistula in a nursery (108°38' E, 22°87' N) in Nanning, Guangxi, China. The symptoms began as small brown lesions, which enlarged over several months to long, striped, slightly sunken lesions, 1 to 9 cm in width and 16 to 135 cm in length. The conspicuous cankers had vertical cracks outlining the canker and evenly spaced horizontal cracks, eventually resulting in whole plants dying back. The cankers were found on 90% of six-year-old plants in this nursery and were also observed in other plantings. On potato dextrose agar (PDA), isolates with similar morphological characteristics were consistently recovered from symptomatic plant tissues after surface sterilization in 75% ethanol for 30 sec and then in 0.1% mercuric chloride for 2 min. Over 100 conidia were examined from three isolates and were found to be elliptical and hyaline when immature, becoming dark brown, one-septate, and longitudinally striate when mature and ranging from 20 to 31 × 11 to 16 μm (average 25.5 × 13.6 μm). The rDNA internal transcribed spacer (ITS) region of isolate LC-1 was sequenced (GenBank Accession No. KM387285), and it showed 100% identity to Lasiodiplodia theobromae (Pat.) Griffon & Maubl. (GenBank KC964548), confirming the morphological identification (2) as L. theobromae (also known as Botryosphaeria rhodina (Cooke) Arx). A culture of this isolate has been preserved in the Guangxi Academy of Agricultural Sciences fungal collection. The pathogenicity of the isolate was tested on healthy twigs and branches of C. fistula trees in a field setting at Guangxi Agricultural Vocational-Technical College, Nanning, Guangxi, in June and August 2014. For each treatment, five green twigs and five 2-year-old branches were used. Five adjacent needle punctures were made on each branch with a sterilized needle. A mycelial plug was then placed on the wound of each branch and wrapped with Parafilm. Control twigs were treated with sterile PDA plugs. One week later, typical lesions were observed on the inoculated branches, with symptoms becoming more extensive after two weeks, but no symptoms were seen on the controls. Koch's postulates were fulfilled by re-isolation of L. theobromae from diseased branches. L. theobromae is recognized as an important wood pathogen and has been reported to cause cankers, dieback, and fruit and root rots in over 500 different hosts, including perennial fruit and nut trees, vegetable crops, and ornamental plants (2). The fungus has been reported on C. fistula in India since the 1970s (1); however, to our knowledge, this is the first report of L. theobromae infecting C. fistula in China. References: (1) R. S. Mathur. The Coelomycetes of India. Bishen Singh Mahendra Pal Singh, Delhi, India, 1979. (2) J. R. Úrbez-Torres et al. Plant Dis. 92:519, 2008.
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Affiliation(s)
- T J Deng
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - Q L Li
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - X L Chen
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - S P Huang
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - T X Guo
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - J Y Mo
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - J M Wei
- Guangxi Nanning Bayshore Landscape Engineering Co. Ltd., Nanning, Guangxi, 530022, China
| | - T Hsiang
- Environmental Sciences, University of Guelph, Guelph, Ontario, N1G 2W1, Canada. The research was supported by Natural Science Foundation of Guangxi, China (2013GXNSFBA019075) and Foundation for Development of Science and Technology of Guangxi Academy of Agricultural Sciences (2013JZ08)
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13
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Li QL, Mo JY, Huang SP, Guo TX, Pan ZB, Ning P, Hsiang T. First Report of Leaf Spot Disease Caused by Glomerella magna on Lobelia chinensis in China. Plant Dis 2013; 97:1383. [PMID: 30722156 DOI: 10.1094/pdis-03-13-0346-pdn] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Lobelia chinensis is a perennial herbaceous plant in the family Campanulaceae that is native to China, where it grows well in moist to wet soils. It is commonly used as a Chinese herbal medicine. In May 2012, symptoms of leaf spot were observed on leaves of L. chinensis in Nanning, Guangxi Zhuang Autonomous Region, China. The leaf lesions began as small, water-soaked, pale greenish to grayish spots, which enlarged to gray to pale yellowish spots, 4 to 6 mm in diameter. At later stages, numerous acervuli appeared on the lesions. Acervuli were mostly epiphyllous, and 40 to 196 μm in diameter. On potato dextrose agar (PDA), a fungus was consistently recovered from symptomatic leaf samples, with a 93% isolation rate from 60 leaf pieces that were surface sterilized in 75% ethanol for 30 s and then in 0.1% mercuric chloride for 45 s. Three single-spore isolates were used to evaluate cultural and morphological characteristics of the pathogen. Setae were two to three septate, dark brown at the base, acicular, and up to 90 μm long. Conidia were long oblong-elliptical, guttulate, hyaline, and 11 to 20 × 4.1 to 6.3 μm (mean 15.2 × 5.1 μm). These morphological characteristics of the fungus were consistent with the description of Colletotrichum magna (teleomorph Glomerella magna Jenkins & Winstead) (1). The rDNA internal transcribed spacer (ITS) region of one isolate, LC-1, was sequenced (GenBank Accession No. KC815123), and it showed 100% identity to G. magna, GenBank HM163187.1, an isolate from Brazil cultured from papaya (2). Although KC815123 was identified as G. magna, it shows 99% identity to GenBank sequences from isolates of C. magna, and more research is needed to elucidate the relationships between these taxa, especially with consideration to host specificity. Pathogenicity tests were performed with each of the three isolates by spraying conidial suspensions (1 × 106 conidia/ml) containing 0.1% Tween 20 onto the surfaces of leaves of 30-day-old and 6- to 8-cm-high plants. For each isolate, 30 leaves from five replicate plants were treated. Control plants were treated with sterilized water containing 0.1% Tween 20. All plants were incubated for 36 h at 25°C and 90% relative humidity in an artificial climate chamber, and then moved into a greenhouse. Seven days after inoculation, gray spots typical of field symptoms were observed on all inoculated leaves, but no symptoms were seen on water-treated control plants. Koch's postulates were fulfilled by reisolation of G. magna from diseased leaves. To our knowledge, this is the first report of G. magna infecting L. chinensis worldwide. References: (1) M. Z. Du et al. Mycologia 97:641, 2005. (2) R. J. Nascimento et al. Plant Dis. 94:1506, 2010.
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Affiliation(s)
- Q L Li
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - J Y Mo
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - S P Huang
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - T X Guo
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - Z B Pan
- Institute of Plant Protection, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi, 530007, China, and Guangxi Key Laboratory of Biology for Crop Diseases and Insect Pests, Nanning, Guangxi, 530007, China
| | - P Ning
- Department of Biotechnology, Guangxi Agricultural Vocation-Technical College, Nanning, Guangxi, 530007, China
| | - T Hsiang
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
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14
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Huang SP, Wu DS, Hu JM, Zhang H, Xie Z, Hu H, Cheng WD. First-principles study: size-dependent optical properties for semiconducting silicon carbide nanotubes. Opt Express 2007; 15:10947-10957. [PMID: 19547452 DOI: 10.1364/oe.15.010947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Using first-principles calculations, we investigate the effect of tube size on optical properties of the zigzag, armchair, and chiral SiC nanotubes. The results indicate that the optical spectra of SiC nanotubes are dependent on the diameter and chirality, and that optical anisotropy is observed for different light polarizations. For a given chirality of SiCNTs, redshifts or blueshifts of the peaks in the dielectric function and energy loss function with increasing tube diameter are possible due to the competition between the size effect and pi orbitals overlapping, and the shifts become smaller as the tube diameter increases. The unusual optical properties of semiconducting SiC nanotubes present an opportunity for applications in electro-optical devices.
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Chen CP, Lee YJ, Chiu ST, Shyu WC, Lee MY, Huang SP, Li H. The application of stem cells in the treatment of ischemic diseases. Histol Histopathol 2006; 21:1209-16. [PMID: 16874664 DOI: 10.14670/hh-21.1209] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Ischemia causes oxygen deprivation, cell injury and related organ dysfunction. Although ischemic injury may be local, it involves many biochemical changes in different cell types. The ability of stem cells to differentiate into different cell lineages provides the possibility of their use in treating a variety of diseases requiring tissue repair or reconstitution, such as stroke, ischemic retinopathy, myocardial infarction, ischemic disorders of the liver, ischemic renal failure, and ischemic limb dysfunction. Several cell types including embryonic stem cells, various progenitor and stem cells of hematopoietic or mesenchymal origin have been used in attempts to reconstitute injured tissue. Xenologous or autologous stem cells may be administered either through the peripheral vascular system or directly by regional injection. The stem cells are then guided to the infarct site by homing signals. Either by cell differentiation or paracrine effects, stem cells or progenitor cells participate in the reconstruction of a favorable microenvironment resulting in neovascularization and tissue regeneration that eventually improve the physiological function of organs with ischemic damage.
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Affiliation(s)
- C P Chen
- Division of High Risk Pregnancy, Mackay Memorial Hospital, Taipei, Taiwan
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16
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Abstract
The purpose of this study was to elucidate correlations between different biochemical measurements of androgen deficiency and clinical symptoms in male residents of Taiwan. An investigation of the serum biochemical markers for androgen deficiency in 650 males, including total testosterone, calculated free testosterone, and bioavailable testosterone, was conducted. Measurements of clinical symptoms were obtained using a questionnaire of the androgen deficiency in the aging male (ADAM) by St Louis University (SLQ). Correlations among the biochemical markers, correlations of the biochemical markers and age, and relationships between the biochemical markers and the SLQ were evaluated. The sensitivity and specificity of the SLQ were determined. Bioavailable and calculated free testosterone correlated better with age than did total testosterone. Eighty percent of the men had a positive SLQ, and 20% had a negative SLQ. The percentage of positive SLQ results increased with age. No statistically significant difference was noted between the biochemical markers of bioavailable and calculated free testosterone levels and the SLQ status except for men aged over 70 years. The SLQ in this study showed an acceptable sensitivity of about 80%, but the specificity was poor (about 20%). In conclusion, bioavailable testosterone and calculated free testosterone were more-closely correlated with age and may be better biochemical markers for androgen deficiency. SLQ might not be a suitable single measurement for androgen deficiency and should be used together with biochemical markers.
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Affiliation(s)
- Y C Lin
- Division of Urology, Department of Surgery, Shin-Kong WHS Memorial Hospital, Taipei, Taiwan, ROC
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Tseng HF, Tan HF, Chang CK, Wang LY, Yang SE, Liau MY, Pan MJ, Chen CY, Huang SP. A seroepidemiology study of varicella among children aged 0-12 years in Taiwan. Southeast Asian J Trop Med Public Health 2005; 36:1201-7. [PMID: 16438146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The epidemiology pattern of varicella appears to vary among regions with different climates, population densities, and degrees of development. This study investigated the age-specific varicella zoster virus (VZV) seroprevalence in children aged 0 to 12 years in Taiwan and compared these seroprevalences between free and private vaccination areas. Residual sera were collected from 13 hospitals with 1,401 valid samples. Immunoglobulin G antibodies to VZV were measured by enzyme-linked immunosorbent assay. Parents of 656 children answered questions about the varicella incidence and varicella vaccination history of their children. In the 8-12 year-olds, the seroprevance ranged between 88.0-93.8% in northern, central, and eastern, while it was only 76.1% in southern Taiwan. The seroprevalence of children 0-5 years old were significantly different between free and private vaccination areas. Seropositive children who reported no history of varicella or receiving varicella vaccine accounted for 26.1-59.3% of the total positive cases. Our findings suggest the possible effects of climate, geographical conditions, and lifestyle on the seroepidemiology of VZV in Taiwan. The efforts of implementing a varicella vaccination program in Taiwan should focus on reaching high levels of coverage.
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Affiliation(s)
- H F Tseng
- Institute of Medical Research, Chang-Jung University, Taiwan.
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Li CC, Chou YH, Shen JT, Huang SP, Tsai HN, Lin HY, Huang CH. Comparison of hand-assisted laparoscopic nephroureterectomy with open surgery for upper urinary tract tumor. Kaohsiung J Med Sci 2001; 17:615-9. [PMID: 12168495] [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: 02/26/2023] Open
Abstract
Herein we report on our initial experience in performing nephroureterectomy by hand-assisted laparoscopic surgery, and compare the results with those performed by traditional open methods. From December 2000 to September 2001, 10 patients with upper urinary tract tumors underwent hand-assisted laparoscopic nephroureterectomy. Except for one patient who required elective conversion to open surgery due to renal vein injury, this cohort of 9 patients was compared to a group of 35 patients who had received traditional open nephroureterectomy over the last 2 years. Demographic, intraoperative and postoperative data were compared retrospectively. These two groups were similar in age, body mass index, operation time and time to postoperative oral intake. However, the hand-assisted laparoscopy group was found to have significantly less blood loss, less need for parenteral narcotic and a shorter length of time needed for postoperative hospitalization than the open group. Thus, in this report we have demonstrated hand-assisted laparoscopic nephroureterectomy to be a safe and efficacious treatment of malignant urinary collecting tumors. We believe the benefits of this minimally invasive surgery make it a viable alternative technique for management of upper urinary tract tumor.
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Affiliation(s)
- C C Li
- Department of Urology, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Road, Kaohsiung 807, Taiwan
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Abstract
Previously reported methods for estimating the number of different alleles at a single locus in a population have not described a useful general result. Using the number of alleles observed in a sample gives an underestimate for the true number of alleles. The similar problem of estimating the number of species in a population was first investigated in 1943. In this article we use the sample coverage method proposed by Chao and Lee in 1992 to estimate the number of alleles in a population when there are unequal allele frequencies. Simulation studies under the recurrent mutation model show that, for reasonable sample sizes, a significantly better estimate of the true number can be obtained than that using only the observed alleles. Results under the stepwise mutation model and infinite-allele model are presented. Possible applications include improving the characterization of the prior distribution for the allele frequencies, adjusting the estimates of genetic diversity, and estimating the range of microsatellite alleles.
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Affiliation(s)
- S P Huang
- Program in Statistical Genetics, Department of Statistics, North Carolina State University, Raleigh, North Carolina 27695-7566, USA
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Liang RJ, Wang HP, Huang SP, Wu MS, Lin JT. Color Doppler sonography for ventral hernias in patients with acute abdomen: preliminary findings. J Clin Ultrasound 2001; 29:435-440. [PMID: 11745849 DOI: 10.1002/jcu.10003] [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: 05/23/2023]
Abstract
PURPOSE We assessed the usefulness of color Doppler sonography (CDUS) in evaluating the vascular status of ventral hernias and distinguishing incarcerated from nonincarcerated ventral hernias. METHODS In this prospective study, 10 patients who presented with acute abdomen and had ventral hernias underwent CDUS from August 1999 to May 2000. Patient age and sex and the clinical severity, mode of therapy, and outcome in these 10 patients were evaluated in relationship to the CDUS findings. RESULTS Five patients had readily visible flow in the bowel within the hernial sac on CDUS. Two of these 5 had spontaneous reduction under conservative treatment, and 3 had asymptomatic ventral hernias with acute abdomen caused by spontaneous bacterial peritonitis. Barely visible flow was visualized in the bowel by CDUS in 4 other patients. Three of these underwent emergency surgery because of peritoneal signs; 2 of them were found to have ischemic changes in the bowel. The fourth patient underwent a successful manual reduction. The remaining patient had absent flow in the bowel on CDUS and underwent emergency surgery, which revealed gangrenous changes in the bowel. CONCLUSIONS The intensity of the Doppler signals on CDUS appears to be a promising predictor of bowel viability in cases of ventral hernia. Thus, CDUS should impact the determination of the treatment plan, including whether to provide conservative treatment or surgery.
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Affiliation(s)
- R J Liang
- Department of Internal Medicine, National Taiwan University Hospital, 7, Chung-Shan South Road, Taipei 10016, Taiwan
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Mukhopadhyay M, Shtrom S, Rodriguez-Esteban C, Chen L, Tsukui T, Gomer L, Dorward DW, Glinka A, Grinberg A, Huang SP, Niehrs C, Izpisúa Belmonte JC, Westphal H. Dickkopf1 is required for embryonic head induction and limb morphogenesis in the mouse. Dev Cell 2001; 1:423-34. [PMID: 11702953 DOI: 10.1016/s1534-5807(01)00041-7] [Citation(s) in RCA: 484] [Impact Index Per Article: 21.0] [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: 10/26/2022]
Abstract
Dickkopf1 (Dkk1) is a secreted protein that acts as a Wnt inhibitor and, together with BMP inhibitors, is able to induce the formation of ectopic heads in Xenopus. Here, we show that Dkk1 null mutant embryos lack head structures anterior of the midbrain. Analysis of chimeric embryos implicates the requirement of Dkk1 in anterior axial mesendoderm but not in anterior visceral endoderm for head induction. In addition, mutant embryos show duplications and fusions of limb digits. Characterization of the limb phenotype strongly suggests a role for Dkk1 both in cell proliferation and in programmed cell death. Our data provide direct genetic evidence for the requirement of secreted Wnt antagonists during embryonic patterning and implicate Dkk1 as an essential inducer during anterior specification as well as a regulator during distal limb patterning.
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Affiliation(s)
- M Mukhopadhyay
- Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA
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Abstract
Stilbenes, fluorescence whitening agents (FWAs), are usually added to cleaning agents in household and in industry. Capillary electrophoresis (CE) was often applied to separate various compounds simultaneously for its multinomial advantages. In this paper, we established analytical methods of six diaminostilbenes with CE and ion-pair chromatography (IPC). The optimum mobile phase for IPC was 11.78 mM tetrabutylammonium hydrogen sulfate (TBA) aqueous and acetonitrile. An IPC method has been developed for simple and direct separation for diaminostilbenes, anionic substances, with TBA as ion-pair reagent. Satisfactory linear ranges (7.0 x 10(-3) approximately 3.0 x 10 microg/mL), correlation coefficients (0.9992-0.9999), and detection limits (6-13 ng/mL) were obtained. Separations were also performed by capillary zone electrophoresis (CZE) using a buffer consisting of Tris (pH 10.1), n-tetradecyltrimethylammonium bromide (TTAB) and acetonitrile. A linear range of 5.0 x 10(-1) - 4.0 x 10 microg/mL, correlation coefficients between 0.9975 and 0.9998, and detection limits between 337 and 446 ng/mL were obtained. In particular, the separation of a pair of similar compounds (mass difference of 2) was achieved by addition of TTAB. The optimum analytical methods of CE and high-performance liquid chromatography (HPLC) were applied to commercial household with direct analysis and standard addition. No significant bias were shown between them by t-test at 95% confidence level.
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Affiliation(s)
- S P Wang
- Department of Applied Chemistry, Providence University, Shalu, Taichung Hsien, Taiwan.
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Lee YC, Wang HP, Huang SP, Chang YT, Wu CT, Yang CS, Wu MS, Lin JT. Obstructive jaundice caused by hepatocellular carcinoma: detection by endoscopic sonography. J Clin Ultrasound 2001; 29:363-366. [PMID: 11424104 DOI: 10.1002/jcu.1050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Tumor thrombus in the extrahepatic biliary tree is a rare mechanism of obstructive jaundice. We present a patient with a minute hepatocellular carcinoma in the caudate lobe that invaded the common hepatic duct and caused biliary obstruction. Endoscopic sonography showed a tumor thrombus with central echogenicity and a "nodule-in-nodule" pattern and suggested the correct diagnosis.
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Affiliation(s)
- Y C Lee
- Department of Internal Medicine, College of Medicine, National Taiwan University, 1, Jen-Ai Road, Taipei, Taiwan
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Huang SP, Chen CC, Li CC, Wu WJ, Chou YH, Huang CH. Adrenal cyst--a case report. Kaohsiung J Med Sci 2001; 17:156-60. [PMID: 11486648] [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: 02/21/2023] Open
Abstract
Adrenal cysts are rare and mostly silent clinically. Herein we report a case of adrenal cyst. A 55-year-old female was incidentally found to have a left suprarenal cystic lesion with a calcified wall by abdominal sonography during a work-up for her epigastralgia and left flank pain. Then, computed tomography (CT) revealed a left adrenal cystic mass with wall calcification, magnetic resonance imaging (MRI) showed left retroperitoneal cystic mass with fluid content, and angiography demonstrated an avascular lesion. Surgical exploration was performed via a flank incision and a calcified cystic adrenal mass was excised. The pathologic diagnosis was adrenal pseudocyst with calcified wall. We discuss the diagnosis and management of adrenal cyst and briefly review the literature.
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Affiliation(s)
- S P Huang
- Department of Urology, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Road, Kaohsiung 807, Taiwan
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Abstract
Depending on its location, epiploic appendagitis may mimic nearly any acute abdominal condition. We present the case of a patient with left lower quadrant pain. Sonography demonstrated an ovoid, hyperechoic, noncompressible lesion at the point of tenderness but no inflammatory changes in the adjacent colonic wall. Color Doppler sonography showed no flow in the lesion. Based on the sonographic diagnosis of epiploic appendagitis, conservative treatment was given, with complete recovery in 5 days. Awareness of these sonographic findings may aid in the early diagnosis of epiploic appendagitis and avoid unnecessary treatment.
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Affiliation(s)
- Y C Lee
- Department of Emergency Medicine, College of Medicine, National Taiwan University, 1, Jen-Ai Road, Taipei, Taiwan
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26
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Casimiro MC, Knollmann BC, Ebert SN, Vary JC, Greene AE, Franz MR, Grinberg A, Huang SP, Pfeifer K. Targeted disruption of the Kcnq1 gene produces a mouse model of Jervell and Lange-Nielsen Syndrome. Proc Natl Acad Sci U S A 2001; 98:2526-31. [PMID: 11226272 PMCID: PMC30171 DOI: 10.1073/pnas.041398998] [Citation(s) in RCA: 195] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2000] [Indexed: 11/18/2022] Open
Abstract
KCNQ1 encodes KCNQ1, which belongs to a family of voltage-dependent K(+) ion channel proteins. KCNQ1 associates with a regulatory subunit, KCNE1, to produce the cardiac repolarizing current, I(Ks). Loss-of-function mutations in the human KCNQ1 gene have been linked to Jervell and Lange-Nielsen Syndrome (JLNS), a disorder characterized by profound bilateral deafness and a cardiac phenotype. To generate a mouse model for JLNS, we created a line of transgenic mice that have a targeted disruption in the Kcnq1 gene. Behavioral analysis revealed that the Kcnq1(-/-) mice are deaf and exhibit a shaker/waltzer phenotype. Histological analysis of the inner ear structures of Kcnq1(-/-) mice revealed gross morphological anomalies because of the drastic reduction in the volume of endolymph. ECGs recorded from Kcnq1(-/-) mice demonstrated abnormal T- and P-wave morphologies and prolongation of the QT and JT intervals when measured in vivo, but not in isolated hearts. These changes are indicative of cardiac repolarization defects that appear to be induced by extracardiac signals. Together, these data suggest that Kcnq1(-/-) mice are a potentially valuable animal model of JLNS.
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Affiliation(s)
- M C Casimiro
- Laboratory for Mammalian Genes and Development, National Institute of Child Health and Human Development/National Institutes of Health, Bethesda, MD 20892, USA
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27
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Wu MS, Chang MC, Huang SP, Tseng CC, Sheu JC, Lin YW, Shun CT, Lin MT, Lin JT. Correlation of histologic subtypes and replication error phenotype with comparative genomic hybridization in gastric cancer. Genes Chromosomes Cancer 2001. [PMID: 11107179 DOI: 10.1002/1098-2264(2000)9999:9999<::aid-gcc1062>3.0.co;2-r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
To characterize phenotypic and genotypic changes in gastric cancer (GC), DNA copy number aberrations (CNAs) were assessed in 53 tumors using comparative genomic hybridization (CGH) and correlated with clinicopathologic characteristics and status of TP53 and replication error (RER). The number of CNAs per tumor was 6.8 (gain 5.3, loss 1.5), and the number of changes was significantly higher in tumors with advanced stage, TP53 mutation, and without RER than in those with early stage (7.7 vs. 3.0), no TP53 mutations (12.4 vs. 4.8) or RER phenotype (8.2 vs. 2.6). Frequent abnormalities included gains on chromosomal arms 8q (43%), 6q (26%), 11q (26%), 13q (24%), 7p (23%), 17q (23%), and 20q (23%), and losses on chromosomal arms 16q (26%), 19p (23%), 5q (19%), 3p (15%), 4q(15%), and 1p (15%). Advanced GC demonstrated a higher prevalence of gains of 8q (51% vs. 10%, P < 0.05) and loss of 16q (33% vs. 0%, P < 0.05) than early GC. Gains on 8q (64% vs. 20%, P < 0.05), 17q (39% vs. 4%, P < 0.05) and losses on 3p (25% vs. 4%, P = 0.05) and 5q (32% vs. 4%, P < 0.05) were higher in intestinal GC than in diffuse GC. On the other hand, gains on 13q were more common in the diffuse type (40% vs. 11%, P < 0.05). As compared with noncardia cancer, cardia cancer showed more gains on 7p (58% vs. 12%, P < 0.05) and 20q (58% vs. 12%, P < 0.05) and more losses on 4q (50% vs. 5%, P < 0.05). The finding of histology-related aberrations and the combination of CGH and molecular data thus provide additional evidence suggesting genetic heterogeneity of GC.
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Affiliation(s)
- M S Wu
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
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28
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Chen CW, Huang SP, Li YC, Chou YH, Huang CH. Adult Wilms' tumor associated with polycythemia--a case report. Kaohsiung J Med Sci 2001; 17:107-11. [PMID: 11416958] [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: 02/20/2023] Open
Abstract
Both Wilms' tumor (nephroblastoma) in adults and polycythemia in Wilms' tumor are rare. Herein we report an extremely rare case of adult Wilms' tumor associated with polycythemia. A 41-year-old female was incidentally found to have right renal mass by abdominal sonography in a routine health examination. Laboratory examination revealed polycythemia (hemoglobin 20.2 g/dL). Although physical examination was unremarkable, CT scan revealed an homogeneous mass at the middle pole of right kidney, and chest x-ray revealed no metastatic lesions. Right radical nephrectomy was performed smoothly. Grossly, the tumor of 5 x 4.5 x 4.5 cm in size was well circumscribed, and had no vascular structure or collecting system involvement. Microscopic features were consistent with adult nephroblastoma. The post-operative course was uneventful. At follow-up, the patient was well, showed no evidence of recurrence and her hemoglobin level had returned to normal (hemoglobin 14.5 g/dl). We suggest that the relationship between polycythemia and Wilms' tumor should be carefully evaluated before surgical treatment.
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Affiliation(s)
- C W Chen
- Department of Urology, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Road, Kaohsiung 807, Taiwan
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29
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Wu MS, Chang MC, Huang SP, Tseng CC, Sheu JC, Lin YW, Shun CT, Lin MT, Lin JT. Correlation of histologic subtypes and replication error phenotype with comparative genomic hybridization in gastric cancer. Genes Chromosomes Cancer 2001; 30:80-6. [PMID: 11107179 DOI: 10.1002/1098-2264(2000)9999:9999<::aid-gcc1062>3.0.co;2-r] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
To characterize phenotypic and genotypic changes in gastric cancer (GC), DNA copy number aberrations (CNAs) were assessed in 53 tumors using comparative genomic hybridization (CGH) and correlated with clinicopathologic characteristics and status of TP53 and replication error (RER). The number of CNAs per tumor was 6.8 (gain 5.3, loss 1.5), and the number of changes was significantly higher in tumors with advanced stage, TP53 mutation, and without RER than in those with early stage (7.7 vs. 3.0), no TP53 mutations (12.4 vs. 4.8) or RER phenotype (8.2 vs. 2.6). Frequent abnormalities included gains on chromosomal arms 8q (43%), 6q (26%), 11q (26%), 13q (24%), 7p (23%), 17q (23%), and 20q (23%), and losses on chromosomal arms 16q (26%), 19p (23%), 5q (19%), 3p (15%), 4q(15%), and 1p (15%). Advanced GC demonstrated a higher prevalence of gains of 8q (51% vs. 10%, P < 0.05) and loss of 16q (33% vs. 0%, P < 0.05) than early GC. Gains on 8q (64% vs. 20%, P < 0.05), 17q (39% vs. 4%, P < 0.05) and losses on 3p (25% vs. 4%, P = 0.05) and 5q (32% vs. 4%, P < 0.05) were higher in intestinal GC than in diffuse GC. On the other hand, gains on 13q were more common in the diffuse type (40% vs. 11%, P < 0.05). As compared with noncardia cancer, cardia cancer showed more gains on 7p (58% vs. 12%, P < 0.05) and 20q (58% vs. 12%, P < 0.05) and more losses on 4q (50% vs. 5%, P < 0.05). The finding of histology-related aberrations and the combination of CGH and molecular data thus provide additional evidence suggesting genetic heterogeneity of GC.
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Affiliation(s)
- M S Wu
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
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30
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Farrell CM, Grinberg A, Huang SP, Chen D, Pichel JG, Westphal H, Felsenfeld G. A large upstream region is not necessary for gene expression or hypersensitive site formation at the mouse beta -globin locus. Proc Natl Acad Sci U S A 2000; 97:14554-9. [PMID: 11121056 PMCID: PMC18957 DOI: 10.1073/pnas.97.26.14554] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Developmental expression at the beta-globin locus is regulated in part by the locus control region, a region upstream of the genes containing at least five major DNase I hypersensitive sites (HSs) in mammalian erythrocytes. Sequences farther 5' of these HSs are conserved in mouse and human, and both loci are embedded within a cluster of functional odorant receptor genes. In humans, distant upstream sequences have been implicated in regulation of the beta-globin genes. In this study, the role of the 5'-most HSs and their adjacent sequence was investigated by deletion of an 11-kb region from the mouse locus, including 5'HS 4.2, 5'HS 5, 5'HS 6, and the 5'beta1 odorant receptor gene. Mice that were homozygous for this deletion were fully viable, and no significant effect on adult beta-globin gene expression was seen. 5'HSs 1-4, which are located downstream of the deletion, were still present in the mutant mice. In addition, two new upstream HSs, HS -60.7 and HS -62.5, were found in erythroid tissue of both wild-type and mutant mice. Therefore, although the possibility of a minor role still exists, neither the HSs nor the other regions deleted in this study are essential for beta-globin gene expression, and it is unlikely that chromatin structure is affected either upstream or downstream of the deletion. This is the largest deletion at the mouse locus control region to show no apparent phenotype, and focuses attention on the possible contribution of sequences even farther upstream.
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Affiliation(s)
- C M Farrell
- Laboratory of Molecular Biology, National Institute of Diabetes and Digestive Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0540, USA
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31
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Wang HP, Huang SP, Sun MS, Chen JH, Wang HH, Lin CC, Chang YS, Yang CS, Wu MS, Lin JT. Urgent endoscopic nasobiliary drainage without fluoroscopic guidance: A useful treatment for critically ill patients with biliary obstruction. Gastrointest Endosc 2000; 52:741-4. [PMID: 11115906 DOI: 10.1067/mge.2000.109800] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND Endoscopic nasobiliary drainage (ENBD) is routinely performed under fluoroscopic control. This is a report of our experience with urgent ENBD without fluoroscopic guidance in critically ill patients. METHODS Twenty-six critically ill patients who underwent urgent ENBD for biliary obstruction were analyzed. ENBD was performed without fluoroscopic control because of high risk of transportation or inaccessibility of the x-ray facilities. A pig-tailed nasobiliary catheter was inserted into the bile duct with the help of a guidewire under endoscopic control to bypass the site of obstruction. Successful placement was confirmed by free flow of bile on aspiration via the nasobiliary catheter. RESULTS A nasobiliary catheter was successfully placed in 23 patients (88%). Adequate bile drainage was achieved in 20 patients with an overall success rate of 77%. There were no procedure-related complications. The mortality rate for patients with successful biliary drainage was 10% (2 of 20), in contrast to 83% (5 of 6) for the group in which drainage was unsuccessful. CONCLUSIONS Urgent ENBD is effective for patients with biliary obstruction. With experience, this procedure may be successfully performed in critically ill patients without fluoroscopic guidance at primary care hospitals or intensive care units where fluoroscopic facilities are not readily available.
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Affiliation(s)
- H P Wang
- Departments of Emergency Medicine and Internal Medicine, National Taiwan University Hospital, Taipei
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32
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Huang SP, Chou YH, Jeng HS, Li CC, Huang CH. Adrenal myelolipoma--report of two cases. Kaohsiung J Med Sci 2000; 16:542-7. [PMID: 11272802] [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: 02/19/2023] Open
Abstract
Adrenal myelolipoma, which is composed of hematopoietic and adipose elements, is a rare benign tumor. Most adrenal myelolipomas are asymptomatic and are found incidentally. We report two cases of adrenal myelolipoma. One was a middle-aged woman with right flank pain. Tumor size increased 8 years later. The other patient was a 63-year-old man presenting with right flank soreness. The right adrenal tumor was found by abdominal sonography. Both of them received adrenalectomy to relieve symptoms and the pathologic results showed adrenal myelolipoma. The clinical, radiologic and pathologic characteristics of these two cases are discussed together with a review of the literature.
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Affiliation(s)
- S P Huang
- Department of Urology, Kaohsiung Medical University, No. 100, Shih-Chuan 1st Road, Kaohsiung 807, Taiwan
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Kaffer CR, Srivastava M, Park KY, Ives E, Hsieh S, Batlle J, Grinberg A, Huang SP, Pfeifer K. A transcriptional insulator at the imprinted H19/Igf2 locus. Genes Dev 2000; 14:1908-19. [PMID: 10921905 PMCID: PMC316810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Igf2 and H19 exhibit parent-of-origin-specific monoallelic expression. H19 is expressed from the maternal chromosome and Igf2 from the paternal. The two genes share enhancer elements and monoallelic expression of both genes is dependent on cis-acting sequences upstream of the H19 promoter. In this work we examine the mechanisms by which this region silences the maternal Igf2 allele and we demonstrate that deletion of this region can result in high levels of activation of both H19 and Igf2 from a single chromosome. Moreover, by inserting this cis element between a promoter and its enhancer at a heterologous position, we demonstrate that the sequences carry both insulator activity and the ability to be stably imprinted. We also characterize the insulator in vitro and show that it is neither enhancer nor promoter specific.
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Affiliation(s)
- C R Kaffer
- Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892 USA.
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34
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Srivastava M, Hsieh S, Grinberg A, Williams-Simons L, Huang SP, Pfeifer K. H19 and Igf2 monoallelic expression is regulated in two distinct ways by a shared cis acting regulatory region upstream of H19. Genes Dev 2000; 14:1186-95. [PMID: 10817754 PMCID: PMC316622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
H19 and Igf2 are expressed in a monoallelic fashion from the maternal and paternal chromosomes, respectively. A region upstream of H19 has been shown to regulate such imprinted expression of both genes in cis. We have taken advantage of a loxP/cre recombinase-based strategy to delete this region in mice in a conditional manner to determine the temporal requirement of the upstream region in initiating and maintaining the imprinted expression of H19 and Igf2. Analysis of allele-specific expression of H19 and Igf2 and DNA methylation at the H19 promoter demonstrates that this region controls the monoallelic expression of the two genes in different ways, suggesting that it harbors two functionally distinct regulatory elements. Continued presence of the region is required to silence maternal Igf2 in accordance with its proposed role as an insulator. However, it does not have a direct role in keeping the paternal H19 promoter silenced. Instead, on the paternal chromosome, the upstream element mediates epigenetic modifications of the H19 promoter region during development, leading to transcriptional silencing of H19. Thereafter, its presence is redundant for preventing transcription. Presently, this temporal requirement of the silencing element appears to be a unique cis activity in the mammalian system. However, it is likely that other cis-acting elements, positive and negative, have the ability to effect stable changes in the chromatin structure and are not constantly required to give signals to the transcriptional machinery.
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MESH Headings
- Alleles
- Animals
- Attachment Sites, Microbiological/genetics
- Chromosomes/genetics
- CpG Islands/genetics
- DNA Methylation
- Female
- Gametogenesis/genetics
- Gene Expression Regulation, Developmental/genetics
- Gene Silencing
- Genomic Imprinting/genetics
- Insulin-Like Growth Factor II/genetics
- Integrases/genetics
- Integrases/metabolism
- Male
- Mice
- Models, Genetic
- Muscle Proteins/genetics
- Mutagenesis, Insertional/genetics
- Promoter Regions, Genetic/genetics
- RNA, Long Noncoding
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Untranslated
- Regulatory Sequences, Nucleic Acid/genetics
- Sequence Deletion/genetics
- Time Factors
- Transcription, Genetic/genetics
- Viral Proteins
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Affiliation(s)
- M Srivastava
- Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, Bethesda, Maryland 20892, USA
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35
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Tomac AC, Grinberg A, Huang SP, Nosrat C, Wang Y, Borlongan C, Lin SZ, Chiang YH, Olson L, Westphal H, Hoffer BJ. Glial cell line-derived neurotrophic factor receptor alpha1 availability regulates glial cell line-derived neurotrophic factor signaling: evidence from mice carrying one or two mutated alleles. Neuroscience 2000; 95:1011-23. [PMID: 10682708 DOI: 10.1016/s0306-4522(99)00503-5] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Glial cell line-derived neurotrophic factor receptor alpha1 (GFRalpha1, also known as GDNFR-alpha) is a glycolipid-anchored membrane protein of the GFRalpha family, which binds glial cell line-derived neurotrophic factor [Jing S. et al. (1996) Cell 85, 1113-1124; Treanor J. J. et al. (1996) Nature 382, 80-83], a survival factor for several populations of central and peripheral neurons, including midbrain dopamine neurons [Lin L. F. et al. (1993) Science 260, 1130-1132], and mediates its ligand-induced cell response via a tyrosine kinase receptor called Ret [Takahashi M. et al. (1988) Oncogene 3, 571-578; Takahashi M. and Cooper G. M. (1987) Molec. Cell Biol. 7, 1378-1385]. In this paper, we show that mice with a null mutation of the GFRalpha1 gene manifest epithelial-mesenchymal interaction deficits in kidney and severe disturbances of intestinal tract development similar to those seen with glial cell line-derived neurotrophic factor or Ret null mutations. There is a marked renal dysgenesis or agenesis and the intrinsic enteric nervous system fails completely to develop. We also show that newborn GFRalpha1-deficient mice display no or minimal changes in dorsal root and sympathetic ganglia. This is in contrast to the deficits reported in these neuronal populations in glial cell line-derived neurotrophic factor and Ret null mutations. Mesencephalic dopaminergic neurons in the substantia nigra and ventral tegmental area appear intact at the time of birth of the mutated mice. Mice homozygous for the GFRalpha1 null mutation die within 24 h of birth because of uremia. Heterozygous animals, however, live to adulthood. There is a significantly reduced neuroprotective effect of glial cell line-derived neurotrophic factor in such heterozygous animals, compared with wild-type littermates, after cerebral ischemia. Taken together with previous data on glial cell line-derived neurotrophic factor and Ret, our results strongly suggest that GFRalpha1 is the essential GFRalpha receptor for signaling in the glial cell line-derived neurotrophic factor-Ret pathway in the kidney and enteric nervous system development, and that GFRalpha2 or GFRalpha3 cannot substitute for the absence of GFRalpha1. Moreover, neuroprotective actions of exogenous glial cell line-derived neurotrophic factor also require full GFRalpha1 receptor expression.
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Affiliation(s)
- A C Tomac
- Laboratory of Mammalian Genes and Development, National Institutes of Health, Bethesda, MD 20892, USA
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36
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Abstract
PURPOSE We sought to describe the clinical features, responsible pathogens, management, and prognosis of infectious scleritis after pterygium excision. METHODS A retrospective study through review of medical records of patients diagnosed with infectious scleritis after pterygium excision over a 10-year period at our institution. RESULTS A total of 16 cases of infectious scleritis after pterygium excision was identified. Among them, eight were associated with sclerokeratitis, and six had multifocal scleral nodules with subconjunctival abscesses. Culture results were positive in 15 (93.8%) cases. Pseudomonas was isolated in 13 (81.3%) patients, fungus in three (18.8%), and two had a mixed growth (12.5%). Based on the in vitro susceptibility test, four (31%) Pseudomonas isolates were resistant to gentamicin, whereas all isolates were sensitive to amikacin. During the course of treatment, eight cases were complicated by vitreous opacity, four developed glaucoma, four had serous retinal or choroidal detachment, and two had secondary cataract. Scleral infection recurred in two patients after cessation of therapy. Among the nine patients treated with medical therapy, two eyes were enucleated, whereas only two attained a visual acuity of > or =2/200 at the end of the follow-up period. On the other hand, seven patients had combined antibiotic therapy and surgical debridement. The number of surgical debridement ranged from one to three, with an average of 1.4. In this combined-treatment group, only one patient required enucleation, and five cases attained a visual acuity of > or =2/200. The duration of hospitalization for patients with combined treatment was 21.2+/-4.8 days compared with the 28.4+/-5.0 days for those with medical treatment alone (p = 0.035). CONCLUSION Surgical debridement in combination with appropriate antimicrobial therapy shortens the course of treatment and improves the visual outcome of severe infectious scleritis after pterygium excision.
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Affiliation(s)
- F C Huang
- Department of Ophthalmology, College of Medicine, National Cheng Kung University, Tainan, Taiwan, R.O.C
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Hou PC, Huang SP. Metabolic and ventilatory responses to hypoxia in two altitudinal populations of the toad, Bufo bankorensis. Comp Biochem Physiol A Mol Integr Physiol 1999; 124:413-21. [PMID: 10682239 DOI: 10.1016/s1095-6433(99)00133-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Effects of hypoxia on resting oxygen consumption (MO2), lung ventilation, and heart rate at different ambient PO2 were compared between lowland and high altitude populations of the toad, Bufo bankorensis. Resting MO2 decreased significantly in mild hypoxia (PO2 = 120 mm Hg) at 10 degrees C and in moderate hypoxia (PO2 = 80 mm Hg) at 25 degrees C in both altitudinal populations; however, resting MO2 did not differ significantly between the two populations. Numbers of lung ventilation periods (VP) and total inspired volume (VL) did not change with PO2 at 10 degrees C, but did increase at moderate and severe hypoxia (40 mm Hg), respectively, at 25 degrees C. Resting heart rates did not change during hypoxia and did not differ between altitude populations. The results suggest (1) the effect of PO2 change on MO2 should be considered in future studies involving transfer of anurans to a different altitude; and (2) the metabolic and ventilatory physiology in B. bankorensis does not compensate for the low temperature and PO2 at high altitude.
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Affiliation(s)
- P C Hou
- Department of Biology, National Cheng Kung University, Taiwan, ROC.
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38
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Affiliation(s)
- S P Huang
- Departments of Internal Medicine, Emergency Medicine, and Pathology, College of Medicine, National Taiwan University, Taipei
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39
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Porter FD, Drago J, Xu Y, Cheema SS, Wassif C, Huang SP, Lee E, Grinberg A, Massalas JS, Bodine D, Alt F, Westphal H. Lhx2, a LIM homeobox gene, is required for eye, forebrain, and definitive erythrocyte development. Development 1997; 124:2935-44. [PMID: 9247336 DOI: 10.1242/dev.124.15.2935] [Citation(s) in RCA: 309] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
We investigated the function of Lhx2, a LIM homeobox gene expressed in developing B-cells, forebrain and neural retina, by analyzing embryos deficient in functional Lhx2 protein. Lhx2 mutant embryos are anophthalmic, have malformations of the cerebral cortex, and die in utero due to severe anemia. In Lhx2−/− embryos specification of the optic vesicle occurs; however, development of the eye arrests prior to formation of an optic cup. Deficient cellular proliferation in the forebrain results in hypoplasia of the neocortex and aplasia of the hippocampal anlagen. In addition to the central nervous system malformations, a cell non-autonomous defect of definitive erythropoiesis causes severe anemia in Lhx2−/− embryos. Thus Lhx2 is necessary for normal development of the eye, cerebral cortex, and efficient definitive erythropoiesis.
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Affiliation(s)
- F D Porter
- Heritable Disorders Branch, National Institutes of Health, Bethesda, MD 20892, USA.
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40
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Huang SP, Decker RJ, Goodrich KC, Parker DJ, Muhlestein JB, Blatter DD, Parker DL. Velocity measurement based on bolus tracking with the aid of three-dimensional reconstruction from digital subtraction angiography. Med Phys 1997; 24:677-86. [PMID: 9167158 DOI: 10.1118/1.597990] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The problem of blood flow measurement in x-ray angiography using measurements of the leading edge of the contrast bolus as it traverses the vascular bed is considered. A new technique for velocity measurement is presented based upon the ratio of the temporal derivative to the spatial derivative of the contrast bolus in the direction of flow. With the addition of a small correction factor, the value obtained is shown to reflect the transport velocity, or the velocity at which the contrast is transported down the vessel of interest. Most blood flow measurements based on bolus tracking techniques are actually using the contrast transport velocity to represent the blood flow velocity. Because of the streaming that occurs due to laminary flow conditions, the measured transport velocity is found to be somewhere between the average and the peak (central) fluid velocities for measurements taken during the traversal of the bolus leading edge. The spatial and temporal variation of the transport velocity are found to be consistent with the bolus motion expected in the presence of laminar flow. From x-ray images of contrast passage through simple tubes, we find that the derivative method measures the transport velocity during passage of the bolus leading edge. In most cases of laminar blood flow, the leading edge transport velocity can be 20%-40% higher than the average blood velocity.
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Affiliation(s)
- S P Huang
- Department of Physics, University of Utah, Salt Lake City 84132, USA
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Chuang YH, Chuang WL, Huang SP, Liu KM, Chen SS, Huang CH. Influence of furosemide on the ureteric damage in a rat model of obstructive uropathy. Urol Int 1997; 58:137-44. [PMID: 9188133 DOI: 10.1159/000282970] [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: 02/04/2023]
Abstract
Furosemide has been used in the diuretic renography and diuretic radionuclide scan to evaluate the severity of hydroureter and hydronephrosis. To elucidate the influence of furosemide on obstructed ureters, unilateral ligation of ureter was performed in 45 rats. Twenty-four of the rats received intramuscular injections of furosemide (6 mg/kg/day) after the third day postligation. Eight rats were sacrificed for examination on days 7, 10 and 14 after ligation, respectively. The remaining 21 untreated rats were also sacrificed for comparison. The severity of hydroureter and hydronephrosis in the ligated side of the furosemide-treated rats was significantly higher than that of the untreated rats. However, the histological changes in the treated and untreated rats showed no significant difference. The ultrastructural alterations aggravated along the course of ureteric obstruction. Intriguingly, the ultrastructural changes were significantly milder in the treated rats. We conclude that the administration of furosemide might increase the severity of hydroureter, but it does not accelerate the ureteric damage of the obstructed ureters.
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Affiliation(s)
- Y H Chuang
- Department of Neurology, Kaohsiung Medical College, Taiwan/ROC
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Huang SP, Shieh GJ, Lee L, Teng HJ, Kao ST, Lin JG. Inhibition effect of shengma-gegen-tang on measles virus in Vero cells and human peripheral blood mononuclear cells. Am J Chin Med 1997; 25:89-96. [PMID: 9167001 DOI: 10.1142/s0192415x97000123] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Shengma-Gegen-Tang has long been used against measles virus in human peripheral blood mononuclear cells (PBMC) as well as in Vero cells. One hundred micrograms/ml Shengma-Gegen-Tang in PBMC displays significant anti-measles activity, whereas the same concentration in Vero cells does not. After eight days of infection, the release of virus is significantly suppressed by Shengma-Gegen-Tang in the case of PBMC. In addition, Shengma-Gegen-Tang has a selective stimulation to the secretion of cytokine TNF-alpha in PBMC. Time kinetic analysis indicated that the stimulation of secretion was rapid and could be detected only 2 hrs following the treatment of the PBMC. It rose to an optimal level in 8-12 hrs. These findings suggest that the magnification of anti-measles virus activity of this agent is lymphocyte dependent and may well be mediated by TNF-alpha.
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Affiliation(s)
- S P Huang
- Institute of Chinese Medicine and Pharmacy, Department of Health, Nan-Kang, Taipei, Taiwan
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Pichel JG, Shen L, Sheng HZ, Granholm AC, Drago J, Grinberg A, Lee EJ, Huang SP, Saarma M, Hoffer BJ, Sariola H, Westphal H. Defects in enteric innervation and kidney development in mice lacking GDNF. Nature 1996; 382:73-6. [PMID: 8657307 DOI: 10.1038/382073a0] [Citation(s) in RCA: 854] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Glial-lial-cell-line-derived neurotrophic factor (GDNF) has been isolated as neurotrophic factor for midbrain dopaminergic neurons. Because of its neurotrophic activity on a wide range of neuronal populations in vitro and in vivo, GDNF is being considered as a potential therapeutic agent for neuronal disorders. During mammalian development, it is expressed not only in the nervous system, but also very prominently in the metanephric kidney and the gastrointestinal tract, suggesting possible functions during organogenesis. We have investigated the role of GDNF during development by generating a null mutation in the murine GDNF locus, and found that mutant mice show kidney agenesis or dysgenesis and defective enteric innervation. We demonstrate that GDNF induces ureter bud formation and branching during metanephros development, and is essential for proper innervation of the gastrointestinal tract.
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Affiliation(s)
- J G Pichel
- Laboratory of Mammalian Genes and Development, National Institutes of Health, Bethesda 20892, USA
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Sheng HZ, Zhadanov AB, Mosinger B, Fujii T, Bertuzzi S, Grinberg A, Lee EJ, Huang SP, Mahon KA, Westphal H. Specification of pituitary cell lineages by the LIM homeobox gene Lhx3. Science 1996; 272:1004-7. [PMID: 8638120 DOI: 10.1126/science.272.5264.1004] [Citation(s) in RCA: 318] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
During pituitary organogenesis, the progressive differentiation of distinct pituitary-specific cell lineages from a common primordium involves a series of developmental decisions and inductive interactions. Targeted gene disruption in mice showed that Lhx3, a LIM homeobox gene expressed in the pituitary throughout development, is essential for differentiation and proliferation of pituitary cell lineages. In mice homozygous for the Lhx3 mutation, Rathke's pouch formed but failed to grow and differentiate; such mice lacked both the anterior and intermediate lobes of the pituitary. The determination of all pituitary cell lineages, except the corticotrophs, was affected, suggesting that a distinct, Lhx3-independent ontogenetic pathway exists for the initial specification of this lineage.
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Affiliation(s)
- H Z Sheng
- Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA
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Pichel JG, Shen L, Sheng HZ, Granholm AC, Drago J, Grinberg A, Lee EJ, Huang SP, Saarma M, Hoffer BJ, Sariola H, Westphal H. GDNF is required for kidney development and enteric innervation. Cold Spring Harb Symp Quant Biol 1996; 61:445-57. [PMID: 9246473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- J G Pichel
- Laboratory of Mammalian Genes and Development, National Institutes of Health, Bethesda, Maryland 20892, USA
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Chuang YH, Chuang WL, Huang SP, Liu KM, Huang CH. The temporal relationship between the severity of hydroureter and the dynamic changes of obstructed ureters in a rat model. Br J Urol 1995; 76:303-10. [PMID: 7551837 DOI: 10.1111/j.1464-410x.1995.tb07705.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE To investigate dynamic changes in the obstructed rat ureter and to evaluate the usefulness of the rat model in the study of obstructive uropathy. MATERIALS AND METHODS Unilateral ligation of the ureter was performed in 26 rats. After ureteric ligation, four to seven rats were killed and examined after 1, 3, 7, 10, and 14 days. The severity of hydroureter and hydronephrosis was assessed by pyelography and the hydroureter-hydronephrosis index. The middle portion of the ureter was prepared for light and electron microscopic observation. Five rats which received a sham operation were also examined as controls. RESULTS The severity of hydroureter and hydronephrosis in the ligated ureters progressively increased during the period of obstruction (P < 0.005) and reached a maximum 10-14 days after ligation. Hypertrophy of the smooth muscle layer developed on the third day after ligation and proliferation of submucosal connective tissue occurred on the 10th day after ligation. The changes in smooth muscle and connective tissue layers also progressed consistently during ureteric obstruction (P < 0.001 and < 0.005, respectively). The number and size of granular endoplasmic reticulum and Golgi apparatus in the smooth muscle cells increased after ureteric ligation and then caveolae exocytosis developed. Deposition of collagen fibres between muscle cells became apparent later. CONCLUSION The rat model of hydrouropathy demonstrated a clear temporal relationship between the severity of hydroureter and the dynamic changes in the obstructed ureter and could be used as a conventional method for the study of obstructive ureter.
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Affiliation(s)
- Y H Chuang
- Department of Neurology, Kaohsiung Medical College, Taiwan, Republic of China
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Huang SP, Cares JH. Community Composition of Plant-parasitic Nematodes in Native and Cultivated Cerrados of Central Brazil. J Nematol 1995; 27:237-243. [PMID: 19277285 PMCID: PMC2619607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Communities of plant-parasitic nematodes collected from five different vegetation types (canopy woodland, savannah, gallery forest, cultivated perennial, and annual plants) and soils (yellowish red latosols, dark red latosols, arenosols, acrisols, and gleysols) were studied. Ninety percent of the soil samples collected from savannah contained at least four genera of plant-parasitic nematodes. The highest population densities were recovered from perennial plants and from acrisols. Nematodes from perennial and annual plants formed one cluster, which had a similar flexible-beta distance to that from the gallery forest. The distance in the native savannah and in canopy woodland was very different. Distance values for the soil aspect were similar for arenosols, yellowish, and dark red latosols. The value for acrisols was much larger than for the other soils.
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Drago J, Gerfen CR, Lachowicz JE, Steiner H, Hollon TR, Love PE, Ooi GT, Grinberg A, Lee EJ, Huang SP. Altered striatal function in a mutant mouse lacking D1A dopamine receptors. Proc Natl Acad Sci U S A 1994; 91:12564-8. [PMID: 7809078 PMCID: PMC45479 DOI: 10.1073/pnas.91.26.12564] [Citation(s) in RCA: 272] [Impact Index Per Article: 9.1] [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: 01/27/2023] Open
Abstract
Of the five known dopamine receptors, D1A and D2 represent the major subtypes expressed in the striatum of the adult brain. Within the striatum, these two subtypes are differentially distributed in the two main neuronal populations that provide direct and indirect pathways between the striatum and the output nuclei of the basal ganglia. Movement disorders, including Parkinson disease and various dystonias, are thought to result from imbalanced activity in these pathways. Dopamine regulates movement through its differential effects on D1A receptors expressed by direct output neurons and D2 receptors expressed by indirect output neurons. To further examine the interaction of D1A and D2 neuronal pathways in the striatum, we used homologous recombination to generate mutant mice lacking functional D1A receptors (D1A-/-). D1A-/- mutants are growth retarded and die shortly after weaning age unless their diet is supplemented with hydrated food. With such treatment the mice gain weight and survive to adulthood. Neurologically, D1A-/- mice exhibit normal coordination and locomotion, although they display a significant decrease in rearing behavior. Examination of the striatum revealed changes associated with the altered phenotype of these mutants. D1A receptor binding was absent in striatal sections from D1A-/- mice. Striatal neurons normally expressing functional D1A receptors are formed and persist in adult homozygous mutants. Moreover, substance P mRNA, which is colocalized specifically in striatal neurons with D1A receptors, is expressed at a reduced level. In contrast, levels of enkephalin mRNA, which is expressed in striatal neurons with D2 receptors, are unaffected. These findings show that D1A-/- mice exhibit selective functional alterations in the striatal neurons giving rise to the direct striatal output pathway.
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Affiliation(s)
- J Drago
- Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892
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Huang SP, Pereira AC. Influence of Inoculum Density, Host, and Low-temperature Period on Delayed Hatch of Meloidogyne javanica Eggs. J Nematol 1994; 26:72-75. [PMID: 19279871 PMCID: PMC2619477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Most eggs of M. javanica hatch within several days when incubated in water. Those that do not are said to show delayed hatching. Several experiments were conducted to determine the effect of specific conditions on the percentage of eggs with delayed hatch. Six initial inoculum densities ranging from 100 to 20,000 eggs per pot did not influence egg hatch within a 45-day incubation period. In a 60-day test, the percentage of eggs hatching after more than 20 days was low for egg masses removed from carrot and okra and high for those from pepper and bean. Increasing exposure to cold temperature (8 C) from 7 to 30 days tended to delay hatch.
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Love PE, Shores EW, Johnson MD, Tremblay ML, Lee EJ, Grinberg A, Huang SP, Singer A, Westphal H. T cell development in mice that lack the zeta chain of the T cell antigen receptor complex. Science 1993; 261:918-21. [PMID: 7688481 DOI: 10.1126/science.7688481] [Citation(s) in RCA: 180] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The zeta subunit of the T cell antigen receptor complex is required for targeting nascent receptor complexes to the cell surface and for receptor-mediated signal transduction. To examine the significance of the zeta subunit in T cell development, mice deficient for zeta expression were generated by gene targeting. These zeta-/- mice had few CD4+CD8+ thymocytes, and the generation of CD4+ and CD8+ single positive T cells was impaired but not completely abrogated. Peripheral T cells were present but were unusual in that they expressed small amounts of CD5 and few T cell receptors. Thus, zeta chain expression influences thymocyte differentiation but is not absolutely required for the generation of single positive T cells.
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MESH Headings
- Animals
- Antigens, CD/analysis
- CD3 Complex/analysis
- CD4 Antigens/analysis
- CD5 Antigens
- CD8 Antigens/analysis
- Cell Differentiation
- Membrane Proteins/genetics
- Membrane Proteins/physiology
- Mice
- Mutation
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/physiology
- Receptors, Antigen, T-Cell, alpha-beta/analysis
- T-Lymphocyte Subsets/cytology
- T-Lymphocyte Subsets/immunology
- Thymus Gland/cytology
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Affiliation(s)
- P E Love
- Laboratory of Mammalian Genes and Development, National Institute of Child Health and Human Development, National Institutes of Health (NIH), Bethesda, MD 20892
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