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Chen SW, Chang ST, Ho CH, Wang JS, Wang RC, Takeuchi K, Chuang SS. Merkel cell carcinoma in Taiwan: A rare tumour with a better prognosis in those harbouring Merkel cell polyomavirus. Malays J Pathol 2022; 44:61-66. [PMID: 35484887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Merkel cell carcinoma (MCC) is a rare malignant cutaneous neuroendocrine tumour affecting mainly elderly patients and is more common in the West than in Asia. It is associated with Merkel cell polyomavirus (MCPyV), immunosuppression, and ultraviolet light. In this study, we retrospectively investigated the first series of MCC from Taiwan and identified 19 cases from three tertiary centres. All patients were males with a median age of 67.5. Twelve (63%) cases occurred in the extremities, with one unique case presenting initially as nodal metastasis of unknown primary. Immunohistochemically, the great majority of tumours expressed CK20 (89%), synaptophysin (89%), and INSM1 (84%), with none positive for TTF1. Eleven (58%) cases were positive for MCPyV by immunohistochemistry (clone CM2B4). All patients were treated with excision, including four with additional radiotherapy and one with radiotherapy and chemotherapy. Nodal status and treatment modalities significantly affected survival. The median survival time of MCPyV-positive cases was much longer than the negative cases (median 40 vs. 10 months). In summary, we presented the first report on the clinicopathological features of MCC in Taiwan, with 58% cases associated with MCPyV. The prognosis of patients with MCPyV-positive tumours was better than those negative for MCPyV.
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Affiliation(s)
- S W Chen
- Lioying Chi-Mei Hospital, Department of Internal Medicine, Division of Hemato-Oncology, Tainan, Taiwan
| | - S T Chang
- Lioying Chi-Mei Hospital, Department of Pathology, Tainan, Taiwan
| | - C H Ho
- Lioying Chi-Mei Hospital, Chi-Mei Medical Center, Medical Research, Tainan, Taiwan
| | - J S Wang
- Kaohsiung Veterans General Hospital, Department of Pathology and Laboratory Medicine, Kaohsiung, Taiwan
| | - R C Wang
- China Medical University Hospital, Department of Pathology, Taichung, Taiwan and HungKuang University, College of Nursing, Department of Nursing, Taichung, Taiwan
| | - K Takeuchi
- The Cancer Institute, Pathology Project for Molecular Targets and The Cancer Institute Hospital, Division of Pathology, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - S S Chuang
- Lioying Chi-Mei Hospital, Department of Pathology, Tainan, Taiwan
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2
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Zhang L, Jin C, Huang HP, Fu X, Wang RC. A Trajectory Privacy Preserving Scheme in the CANNQ Service for IoT. Sensors (Basel) 2019; 19:s19092190. [PMID: 31083606 PMCID: PMC6540352 DOI: 10.3390/s19092190] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 11/16/2022]
Abstract
Nowadays, anyone carrying a mobile device can enjoy the various location-based services provided by the Internet of Things (IoT). 'Aggregate nearest neighbor query' is a new type of location-based query which asks the question, 'what is the best location for a given group of people to gather?' There are numerous, promising applications for this type of query, but it needs to be done in a secure and private way. Therefore, a trajectory privacy-preserving scheme, based on a trusted anonymous server (TAS) is proposed. Specifically, in the snapshot queries, the TAS generates a group request that satisfies the spatial K-anonymity for the group of users-to prevent the location-based service provider (LSP) from an inference attack-and in continuous queries, the TAS determines whether the group request needs to be resent by detecting whether the users will leave their secure areas, so as to reduce the probability that the LSP reconstructs the users' real trajectories. Furthermore, an aggregate nearest neighbor query algorithm based on strategy optimization, is adopted, to minimize the overhead of the LSP. The response speed of the results is improved by narrowing the search scope of the points of interest (POIs) and speeding up the prune of the non-nearest neighbors. The security analysis and simulation results demonstrated that our proposed scheme could protect the users' location and trajectory privacy, and the response speed and communication overhead of the service, were superior to other peer algorithms, both in the snapshot and continuous queries.
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Affiliation(s)
- Lin Zhang
- School of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
- Institute of Computer Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Chao Jin
- School of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Hai-Ping Huang
- School of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
- Institute of Computer Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Xiong Fu
- School of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
- Institute of Computer Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Ru-Chuan Wang
- School of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
- Institute of Computer Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
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Sha C, Liu Q, Song SY, Wang RC. A Type of Annulus-Based Energy Balanced Data Collection Method in Wireless Rechargeable Sensor Networks. Sensors (Basel) 2018; 18:s18093150. [PMID: 30231536 PMCID: PMC6164686 DOI: 10.3390/s18093150] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Revised: 09/12/2018] [Accepted: 09/13/2018] [Indexed: 11/16/2022]
Abstract
With the increasing number of ubiquitous terminals and the continuous expansion of network scale, the problem of unbalanced energy consumption in sensor networks has become increasingly prominent in recent years. However, a node scheduling strategy or an energy consumption optimization algorithm may be not enough to meet the requirements of large-scale application. To address this problem a type of Annulus-based Energy Balanced Data Collection (AEBDC) method is proposed in this paper. The circular network is divided into several annular sectors of different sizes. Nodes in the same annulus-sector form a cluster. Based on this model, a multi-hop data forwarding strategy with the help of the candidate cluster headers is proposed to balance energy consumption during transmission and to avoid buffer overflow. Meanwhile, in each annulus, there is a Wireless Charging Vehicle (WCV) that is responsible for periodically recharging the cluster headers as well as the candidate cluster headers. By minimizing the recharging cost, the energy efficiency is enhanced. Simulation results show that AEBDC can not only alleviate the "energy hole problem" in sensor networks, but also effectively prolong the network lifetime.
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Affiliation(s)
- Chao Sha
- School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, Jiangsu, China.
| | - Qin Liu
- School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, Jiangsu, China.
| | - Si-Yi Song
- School of Oversea Education, Nanjing University of Posts and Telecommunications, Nanjing 210003, Jiangsu, China.
| | - Ru-Chuan Wang
- School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, Jiangsu, China.
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Sha C, Wang QW, Zhang L, Wang RC. A High-Efficiency Data Collection Method Based on Maximum Recharging Benefit in Sensor Networks. Sensors (Basel) 2018; 18:s18092887. [PMID: 30200353 PMCID: PMC6163808 DOI: 10.3390/s18092887] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2018] [Revised: 08/24/2018] [Accepted: 08/29/2018] [Indexed: 11/16/2022]
Abstract
To reduce time delays during data collection and prolong the network lifetime in Wireless Rechargeable Sensor Networks (WRSNs), a type of high-efficiency data collection method based on Maximum Recharging Benefit (DCMRB) is proposed in this paper. According to the minimum number of the Mobile Data Collectors (MDCs), the network is firstly divided into several regions with the help of the Virtual Scan Line (VSL). Then, the MDCs and the Wireless Charging Vehicles (WCVs) are employed in each region for high efficient data collection and energy replenishment. In order to ensure the integrity of data collection and reduce the rate of packet loss, a speed adjustment scheme for MDC is also proposed. In addition, by calculating the adaptive threshold of the recharging request, those nodes with different energy consumption rates are recharged in a timely way that avoids their premature death. Finally, the limited battery capacity of WCVs and their energy consumption while moving are also taken into account, and an adaptive recharging scheme based on maximum benefit is proposed. Experimental results show that the energy consumption is effectively balanced in DCMRB. Furthermore, this can not only enhance the efficiency of data collection, but also prolong the network lifetime compared with the Energy Starvation Avoidance Online Charging scheme (ESAOC), Greedy Mobile Scheme based on Maximum Recharging Benefit (GMS-MRB) and First-Come First-Served (FCFS) methods.
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Affiliation(s)
- Chao Sha
- School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Qi-Wei Wang
- School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Lu Zhang
- School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Ru-Chuan Wang
- School of Computer Science, Software and Cyberspace Security, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
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Shen S, Wei ZQ, Sun LJ, Su YQ, Wang RC, Jiang HM. The Shared Bicycle and Its Network-Internet of Shared Bicycle (IoSB): A Review and Survey. Sensors (Basel) 2018; 18:s18082581. [PMID: 30087263 PMCID: PMC6111972 DOI: 10.3390/s18082581] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Revised: 07/12/2018] [Accepted: 07/21/2018] [Indexed: 11/16/2022]
Abstract
With the expansion of Intelligent Transport Systems (ITS) in smart cities, the shared bicycle has developed quickly as a new green public transportation mode, and is changing the travel habits of citizens heavily across the world, especially in China. The purpose of the current paper is to provide an inclusive review and survey on shared bicycle besides its benefits, history, brands and comparisons. In addition, it proposes the concept of the Internet of Shared Bicycle (IoSB) for the first time, as far as we know, to find a feasible solution for those technical problems of the shared bicycle. The possible architecture of IoSB in our opinion is presented, as well as most of key IoT technologies, and their capabilities to merge into and apply to the different parts of IoSB are introduced. Meanwhile, some challenges and barriers to IoSB’s implementation are expressed thoroughly too. As far as the advice for overcoming those barriers be concerned, the IoSB’s potential aspects and applications in smart city with respect to technology development in the future provide another valuable further discussion in this paper.
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Affiliation(s)
- Shu Shen
- School of Computer Science & Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Zhao-Qing Wei
- School of Computer Science & Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Li-Juan Sun
- School of Computer Science & Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Yang-Qing Su
- School of Internet of things, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Ru-Chuan Wang
- School of Computer Science & Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Han-Ming Jiang
- School of Internet of things, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
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Maddy AJ, Lee EE, Maderal AD, Wang RC, Tosti A, Cho-Vega JH. A case of disseminated follicular spicules in HIV-associated follicular syndrome in the absence of the seven known human polyomaviruses, suggesting that this disorder is distinct from trichodysplasia spinulosa. Br J Dermatol 2018; 179:774-775. [PMID: 29573272 DOI: 10.1111/bjd.16562] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- A J Maddy
- Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL, U.S.A
| | - E E Lee
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX, U.S.A
| | - A D Maderal
- Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL, U.S.A
| | - R C Wang
- Department of Dermatology, University of Texas Southwestern Medical Center, Dallas, TX, U.S.A
| | - A Tosti
- Department of Dermatology and Cutaneous Surgery, Miller School of Medicine, University of Miami, Miami, FL, U.S.A
| | - J H Cho-Vega
- Dermatopathology, Department of Pathology and Laboratory Medicine, Sylvester Comprehensive Cancer Center and Miller School of Medicine, University of Miami, Miami, FL, U.S.A
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7
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Yan HW, Li L, Wang RC, Yang Y, Xie Y, Tang J, Shi ZY. Clinical efficacies of coracoclavicular ligament reconstruction using suture anchor versus hook plate in the treatment of distal clavicle fracture. Orthop Traumatol Surg Res 2017; 103:1287-1293. [PMID: 28801112 DOI: 10.1016/j.otsr.2017.07.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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] [Received: 10/04/2016] [Revised: 06/19/2017] [Accepted: 07/10/2017] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Comparison of clinical efficacies between coracoclavicular ligament reconstruction using autologous gracilis tendon with suture anchor and clavicular hook plate for the treatment of acute Neer type II distal clavicle fracture. HYPOTHESIS Both coracoclavicular reconstruction with autologous gracilis tendon and clavicular hook plate could achieve satisfactory results for treating acute Neer type II distal clavicle fracture. METHODS Acute Neer type II distal clavicle fracture patients enrolled in this prospective randomized study were divided into the coracoclavicular ligament reconstruction group (using autologous gracilis tendon and suture anchor) and the hook plate group. Clinical outcomes were evaluated by shoulder X-ray, forward flexion, abduction and external rotation angle, Constant-Murley shoulder score and pain Visual Analogue Scale (VAS) at each follow-up for up to 24 months. RESULTS The current study enrolled a total of 42 acute Neer type II distal clavicle fracture patients attended our hospital from March 2010 to December 2013. All patients had achieved complete healing and followed up for an average of 26 months (range, 24-38 months). At 3-month and 6-month follow-ups, Constant-Murley score in the ligament reconstruction group was significantly higher (93.8±2.6 vs. 88.7±8.7; 95.9±2.7 vs. 93.0±7.0, P<0.05), while VAS score was poorer than those in the hook plate group (1.6±0.8 vs. 2.5±1.9; 1.1±1.0 vs. 1.6±1.7, P<0.05). DISCUSSION Reconstruction with autologous gracilis tendon improved VAS pain score in early postoperation follow-up; while Constant-Murley score and VAS score were significantly improved in the hook plate group after the implant was removed. These suggested that both coracoclavicular reconstruction with autologous gracilis tendon and clavicular hook plate could achieve satisfactory results. LEVEL OF EVIDENCE Level II, low-powered prospective randomized trial.
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Affiliation(s)
- H W Yan
- The Fourth Affiliated Hospital of Guangxi Medical University, Liu Zhou Worker's Hospital, Liuzhou, Guangxi 545005, China
| | - L Li
- The Fourth Affiliated Hospital of Guangxi Medical University, Liu Zhou Worker's Hospital, Liuzhou, Guangxi 545005, China
| | - R C Wang
- The Fourth Affiliated Hospital of Guangxi Medical University, Liu Zhou Worker's Hospital, Liuzhou, Guangxi 545005, China
| | - Y Yang
- The Fourth Affiliated Hospital of Guangxi Medical University, Liu Zhou Worker's Hospital, Liuzhou, Guangxi 545005, China
| | - Y Xie
- The Fourth Affiliated Hospital of Guangxi Medical University, Liu Zhou Worker's Hospital, Liuzhou, Guangxi 545005, China
| | - J Tang
- The Fourth Affiliated Hospital of Guangxi Medical University, Liu Zhou Worker's Hospital, Liuzhou, Guangxi 545005, China
| | - Z Y Shi
- The Fourth Affiliated Hospital of Guangxi Medical University, Liu Zhou Worker's Hospital, Liuzhou, Guangxi 545005, China.
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Wu PF, Xiao F, Sha C, Huang HP, Wang RC, Xiong NX. Node Scheduling Strategies for Achieving Full-View Area Coverage in Camera Sensor Networks. Sensors (Basel) 2017; 17:s17061303. [PMID: 28587304 PMCID: PMC5492733 DOI: 10.3390/s17061303] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 05/26/2017] [Accepted: 06/02/2017] [Indexed: 11/25/2022]
Abstract
Unlike conventional scalar sensors, camera sensors at different positions can capture a variety of views of an object. Based on this intrinsic property, a novel model called full-view coverage was proposed. We study the problem that how to select the minimum number of sensors to guarantee the full-view coverage for the given region of interest (ROI). To tackle this issue, we derive the constraint condition of the sensor positions for full-view neighborhood coverage with the minimum number of nodes around the point. Next, we prove that the full-view area coverage can be approximately guaranteed, as long as the regular hexagons decided by the virtual grid are seamlessly stitched. Then we present two solutions for camera sensor networks in two different deployment strategies. By computing the theoretically optimal length of the virtual grids, we put forward the deployment pattern algorithm (DPA) in the deterministic implementation. To reduce the redundancy in random deployment, we come up with a local neighboring-optimal selection algorithm (LNSA) for achieving the full-view coverage. Finally, extensive simulation results show the feasibility of our proposed solutions.
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Affiliation(s)
- Peng-Fei Wu
- School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Fu Xiao
- School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Chao Sha
- School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
- Nanjing University of Information Science & Technology, Nanjing 210044, China.
| | - Hai-Ping Huang
- School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Ru-Chuan Wang
- School of Computer Science, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
| | - Nai-Xue Xiong
- Department of Mathematics and Computer Science, Northeastern State University, Tahlequah, OK 74464, USA.
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Sha C, Qiu JM, Li SY, Qiang MY, Wang RC. A Type of Low-Latency Data Gathering Method with Multi-Sink for Sensor Networks. Sensors (Basel) 2016; 16:s16060923. [PMID: 27338401 PMCID: PMC4934349 DOI: 10.3390/s16060923] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 06/15/2016] [Accepted: 06/16/2016] [Indexed: 11/23/2022]
Abstract
To balance energy consumption and reduce latency on data transmission in Wireless Sensor Networks (WSNs), a type of low-latency data gathering method with multi-Sink (LDGM for short) is proposed in this paper. The network is divided into several virtual regions consisting of three or less data gathering units and the leader of each region is selected according to its residual energy as well as distance to all of the other nodes. Only the leaders in each region need to communicate with the mobile Sinks which have effectively reduced energy consumption and the end-to-end delay. Moreover, with the help of the sleep scheduling and the sensing radius adjustment strategies, redundancy in network coverage could also be effectively reduced. Simulation results show that LDGM is energy efficient in comparison with MST as well as MWST and its time efficiency on data collection is higher than one Sink based data gathering methods.
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Affiliation(s)
- Chao Sha
- College of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Provincial Key Laboratory for Computer Information Processing Technology, Soochow University, Suzhou 215006, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
- Nanjing University of Information Science & Technology, Nanjing 210044, China.
| | - Jian-Mei Qiu
- College of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
| | - Shu-Yan Li
- College of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- School of Engineering and Computation, New York Institute of Technology, New York 11568-8000, NY, USA.
| | - Meng-Ye Qiang
- College of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- School of Engineering and Computation, New York Institute of Technology, New York 11568-8000, NY, USA.
| | - Ru-Chuan Wang
- College of Computer, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.
- Provincial Key Laboratory for Computer Information Processing Technology, Soochow University, Suzhou 215006, China.
- Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks, Nanjing 210003, China.
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Abstract
The inhibitory effects of Chinese leek(Allium tuberosum) on Fusarium oxysporum f. sp. cubense (Foc) and on Fusarium wilt incidence were studied in order to identify a potential efficient way to control the disease. Adopting the rotation system of Chinese leek-banana reduced the Fusarium wilt incidence and disease severity index by 88 %-97 % and 91 %-96 %, respectively, improved the crop value by 36 %-86 %, in an area heavily infested by Foc between 2007 and 2009. As a result of inoculation in the greenhouse, Chinese leek treatment reduced disease incidence and the disease severity index by 58 % and 62 %, respectively in the variety Baxi (AAA) and by 79 % and 81 %, respectively in the variety Guangfen NO.1 (ABB). Crude extracts of Chinese leek completely inhibited the growth of Foc race 4 on Petri dishes, suppressed the proliferation of the spores by 91 % and caused 87 % spore mortality. The findings of this study suggest that Chinese leek has the potential to inhibit Foc growth and Fusarium wilt incidence. This potential may be developed into an environmentally friendly treatment to control Fusarium wilt of banana.
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Affiliation(s)
- Y H Huang
- Key Laboratory of South Subtropical Fruit Biology and Genetic Resource Utilization, Ministry of Agriculture, Guangzhou 510640, China ; Fruit Research Institute, Guangdong Academy of Agriculture Science, Guangzhou 510640, China ; College of Horticulture and Landscape, Hunan Agriculture University, Changsha 410128, China
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Lee DN, Liu SR, Chen YT, Wang RC, Lin SY, Weng CF. Effects of diets supplemented with organic acids and nucleotides on growth, immune responses and digestive tract development in weaned pigs. J Anim Physiol Anim Nutr (Berl) 2008; 91:508-18. [PMID: 17988355 DOI: 10.1111/j.1439-0396.2007.00684.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Sixty-eight (Experiment 1, 46 days feeding) and sixteen (Experiment 2, 21 days feeding) 21-days-old weaned pigs were allotted to four dietary treatments including control, 0.6% organic acids (OA), 0.1% nucleotides (NA) and 0.6% OA plus 0.1% NA for determining the dietary effects. In Experiment 1, OA enhanced peripheral blood mononuclear cells proliferation on day 28 and 46. The plasma immunoglobulin (Ig) A level was elevated by OA (p < 0.06) and NA (p < 0.07), respectively. In Experiment 2, NA increased plasma IgM level, and had an interactive effect with OA on ileal Peyer's patches and mesenteric lymph node lymphocyte proliferation, bile and plasma IgA levels, and jejunal crypt depth. NA elevated gastric pepsin and jejunal alkaline phosphatase activities, however, decreased ileal aminopeptidase N, sucrase or maltase activity. These results suggest that OA and NA have synergistically enhanced the gut-associated lymphocyte responses and NA modulates the digestive tract development of weaned pigs.
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Affiliation(s)
- D N Lee
- Department of Animal Science, National Ilan University, Ilan, Taiwan
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12
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Wang JZ, Wang RC, Li F, Jiang MW, Jin DW. EMG signal classification for myoelectric teleoperating a dexterous robot hand. Conf Proc IEEE Eng Med Biol Soc 2007; 2005:5931-3. [PMID: 17281611 DOI: 10.1109/iembs.2005.1615841] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This paper details a strategy of discriminating finger motions using surface electromyography (EMG) signals, which could be applied to teleoperating a dexterous robot hand or controlling the advanced multi-fingered myoelectric prosthesis for hand amputees. Finger motions discrimination is the key problem in this study. Thus the emphasis is put on myoelectric signal processing approaches in this paper. The EMG signal classification system was established based on the surface EMG signals from the subject's forearm. Four pairs of electrodes were attached on the subjects to acquire the signals during six types of finger motions, i.e. thumb extension, thumb flexion, index finger extension, index finger flexion, middle finger extension, and middle finger flexion. In order to distinguish these finger motions. A combination of autoregressive (AR) model and an Artificial Neural Network (ANN) was used in the system. The discrimination procedure consists of two steps. Firstly, the AR model is used to preprocess the surface EMG signals to reduce the scale of the data. These data will be imported into the myoelectric pattern classifier. Secondly the coefficients of AR model are imported into the ANN to identify the finger motions. The experimental results show that the discrimination system works with satisfaction.
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Affiliation(s)
- J Z Wang
- Division of Intelligent and Biomechanical System, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
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13
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Wang RC, Wen XH, Qian Y. Microbial population structure changes in a suspended carrier biofilm reactor. Water Sci Technol 2006; 54:145-53. [PMID: 17167898 DOI: 10.2166/wst.2006.740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The changes of microbial population structure in biofilm caused by variations of COD/NHNH4(+)-N ratio in influent were investigated in a suspended carrier biofilm reactor (SCBR). When COD/NHNH4(+)-N was 10, the highest COD removal reached was about 73.8 per cent, whereas the highest NH4(+)-N removal, about 55.9 per cent, was reached when COD/NH4(+)-N was 5. By using fluorescence in situ hybridization (FISH) and confocal laser scanning microscopy (CLSM) observation, it was found that the thickness of the biofilm formed on the carrier was about 80 to 120 microm, and ammonia-oxidizing bacteria (AOB) and nitrifying bacteria existed mainly in the upper layer about 20 to 30 microm. The results of the quinone profile analysis showed that when the COD/NH4(+)-N increased, the microbial diversity (DQ) increased, while the proportions of AOB and nitrifying bacteria in the biofilm communities decreased.
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Affiliation(s)
- R C Wang
- Pollution Control and Resource Reuse State Key Lab of China, Key Lab of Yangtze Aquatic Environment, Min. of Education of China, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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Abstract
BACKGROUND/AIMS Parenchymal central nervous system microglia are repopulated by bone marrow derived monocytes more slowly than any other reticuloendothelial cells. The contribution of bone marrow derived monocytes to the uninflammed retina has not been studied. The present study sought to determine repopulation of retinal microglia in uniflammed retina by bone marrow derived monocytes in bone marrow chimeric rats. METHODS Chimeric (Y-->X) Lewis rats were constructed by transplanting 5 x 10(7) male bone marrow cells into lethally irradiated female recipient rats. The chimeras were sacrificed 8, 10, 12, 30, and 52 weeks after bone marrow transplant, and retina, brain, lung, and spleen samples were collected. DNA was extracted and quantified. Y positive infiltrating cells in the collected samples were detected by polymerase chain reaction amplification of a Y chromosome specific 104 bp fragment. RESULTS There was a rapid repopulation of haematopoietic tissues in the spleen (at 8 weeks), confirming the establishment of chimerism, and to a lesser extent, of lung (at 30 weeks). This repopulation was absent in the brain parenchyma and retina until 52 weeks after transplantation. CONCLUSIONS These data indicate that resident microglia in the retina, much like those in the brain, are stable in number in the retinal compartment (up to 1 year), and repopulation by bone marrow derived cells may be delayed for a year.
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Affiliation(s)
- T A Albini
- Doheny Eye Institute, DVRC 211, 1450 San Pablo Street, Los Angeles, CA 90033, USA
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15
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Zamir E, Wang RC, Krishnakumar S, Aiello Leverant A, Dugel PU, Rao NA. Juvenile xanthogranuloma masquerading as pediatric chronic uveitis: a clinicopathologic study. Surv Ophthalmol 2001; 46:164-71. [PMID: 11578649 DOI: 10.1016/s0039-6257(01)00253-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [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: 10/18/2022]
Abstract
Juvenile xanthogranuloma (JXG) is a rare, pediatric histiocytic skin disorder that may affect the eye. It can present with protean ocular manifestations, including masquerade uveitis, heterochromia, hyphema, or glaucoma. It very rarely involves the retina and posterior segment; indeed, posterior involvement has been documented histopathologically in only one case. We present the case of a 2-year-old child with ocular JXG presenting as chronic, refractive uveitis, without skin or systemic findings. The blind, painful eye was enucleated and found to harbor a diffuse histiocytic process that involved both the anterior and posterior segments, including the retina and subretinal space. Histological, immunohistochemical, and electron microscopic studies confirmed the diagnosis of JXG. The pathologic classification and differential diagnosis of systemic histiocytic disorders are discussed. Since JXG can present as masquerade pediatric uveitis, this entity should be considered in children with atypical uveitis. In rare instances, JXG may involve the posterior segment and the retina, leading to retinal detachment and blindness.
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Affiliation(s)
- E Zamir
- Doheny Eye Institute, Keck School of Medicine of the University of Southern California, Los Angeles, CA 90033, USA
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16
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Crasta OR, Francki MG, Bucholtz DB, Sharma HC, Zhang J, Wang RC, Ohm HW, Anderson JM. Identification and characterization of wheat-wheatgrass translocation lines and localization of barley yellow dwarf virus resistance. Genome 2000; 43:698-706. [PMID: 10984183] [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: 02/17/2023]
Abstract
Stable introgression of agronomically important traits into crop plants through wide crossing often requires the generation and identification of translocation lines. However, the low efficiency of identifying lines containing translocations is a significant limitation in utilizing valuable alien chromatin-derived traits. Selection of putative wheatgrass-wheat translocation lines based on segregation ratios of progeny from gamma-irradiated seed using a standard phenotypic analysis resulted in a low 4% success rate of identifying barley yellow dwarf virus (BYDV) resistant and susceptible translocation lines. However, 58% of the susceptible progeny of this irradiated seed contained a Thinopyrum intermedium chromosome-specific repetitive sequence, which indicated that gamma-irradiation-induced translocations occurred at high rate. Restriction fragment length polymorphism (RFLP) analysis of susceptible lines containing alien chromatin, their resistant sister lines and other resistant lines showed that more than one third of the progeny of gamma-irradiated double monosomic seeds contained wheatgrass-wheat translocations. Genomic in situ hybridization (GISH) analysis of selected lines confirmed that these were wheatgrass-wheat translocation lines. This approach of initially identifying BYDV susceptible deletion lines using an alien chromosome-specific repetitive sequence followed by RFLP analysis of their resistant sister lines efficiently identified resistant translocation lines and localized the BYDV resistance to the distal end of the introgressed Th. intermedium chromosome.
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Affiliation(s)
- O R Crasta
- CuraGen Corporation, New Haven, CT 06511, USA
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17
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Abstract
A case of presumed embolic transient ischemic episodes and multifocal infarcts to the occipital and parietal cortices and the cerebellum of a young woman with ulcerative colitis is reported. These episodes were manifested by multifocal neurologic deficits including cortical blindness, visual hallucinations, and homonymous hemianopsia. They correlated with parenteral nutrition via a central line, presumed venous, but found to be in the subclavian artery. The complications of central venous lines are reviewed. The need for attention to neighborhood structures and unexpected symptoms, in view of the less well-recognized arterial embolic complications is emphasized.
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Affiliation(s)
- R C Wang
- William H. Havener Eye Center, The Ohio State University, Columbus, USA
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18
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Abola AP, Willits MG, Wang RC, Long SR. Reduction of adenosine-5'-phosphosulfate instead of 3'-phosphoadenosine-5'-phosphosulfate in cysteine biosynthesis by Rhizobium meliloti and other members of the family Rhizobiaceae. J Bacteriol 1999; 181:5280-7. [PMID: 10464198 PMCID: PMC94033 DOI: 10.1128/jb.181.17.5280-5287.1999] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
We have cloned and sequenced three genes from Rhizobium meliloti (Sinorhizobium meliloti) that are involved in sulfate activation for cysteine biosynthesis. Two of the genes display homology to the Escherichia coli cysDN genes, which code for an ATP sulfurylase (EC 2.7.7.4). The third gene has homology to the E. coli cysH gene, a 3'-phosphoadenosine-5'-phosphosulfate (PAPS) reductase (EC 1.8.99.4), but has greater homology to a set of genes found in Arabidopsis thaliana that encode an adenosine-5'-phosphosulfate (APS) reductase. In order to determine the specificity of the R. meliloti reductase, the R. meliloti cysH homolog was histidine tagged and purified, and its specificity was assayed in vitro. Like the A. thaliana reductases, the histidine-tagged R. meliloti cysH gene product appears to favor APS over PAPS as a substrate, with a Km for APS of 3 to 4 microM but a Km for PAPS of >100 microM. In order to determine whether this preference for APS is unique to R. meliloti among members of the family Rhizobiaceae or is more widespread, cell extracts from R. leguminosarum, Rhizobium sp. strain NGR234, Rhizobium fredii (Sinorhizobium fredii), and Agrobacterium tumefaciens were assayed for APS or PAPS reductase activity. Cell extracts from all four species also preferentially reduce APS over PAPS.
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Affiliation(s)
- A P Abola
- Howard Hughes Medical Institute, Department of Biological Sciences, Stanford University, Stanford, California 94305-5020, USA
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19
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Abstract
OBJECTIVES/HYPOTHESIS Knowledge and preservation of the neurovascular supply to strap muscles, such as the sternohyoid (SH) muscle, used in laryngotracheal reconstruction are important in preventing loss of tissue and bulk from ischemia and/or denervation. STUDY DESIGN Arteriovenous and neural supply variations to the strap muscles were examined in cadaver specimens. METHODS Strap muscle neurovascular supply was studied in 16 cadavers, including one transparent corrosion cast specimen with injected vessels. RESULTS For the upper SH and upper belly of the omohyoid (OMO), the arterial supply consistently arose from a branch of the superior thyroid artery (STA) most commonly terminating at the cricothyroid membrane. The inferior SH was supplied by the inferior thyroid artery. The ansa cervicalis innervated the SH inferiorly with a branch below the loop. Each arterial branch to the muscles had an accompanying venous tributary. The corrosion cast specimen demonstrated that the arterial lumen diameters were almost threefold larger in branches entering the upper SH, compared with the lower SH or OMO. Small intramuscular arteries without axial supply were found within the middle third of the upper SH, the lower SH, and the upper OMO. CONCLUSIONS It is possible to preserve neurovascular integrity in an inferiorly based SH flap. The superior and medial borders are released, with dissection of vascular supply laterally and deep to the muscle, and preservation of the inferior terminal ansa branch.
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Affiliation(s)
- R C Wang
- Division of Otolaryngology--Head and Neck Surgery, University of Nevada School of Medicine, Las Vegas 89102, USA.
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20
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Abstract
The normal motion of the cricoarytenoid joint was characterized and analyzed in this study using seven fresh cadaver larynges mounted rigidly in an external fixator apparatus after radiopaque markers were attached to laryngeal landmarks. Fluoroscopic imaging and recording was performed of top, front, and side views while the arytenoid cartilages of each larynx were manipulated through the full range of motion from adduction to abduction. Computer video capture was performed of the recordings and editing of still frames accomplished to generate three-dimensional plots of cricoarytenoid joint motion, which are shown in the manuscript. Selective and varying sequential disconnection of muscular and ligamentous structures to the arytenoid cartilage was achieved to determine their contributions to cricoarytenoid joint motion limitations and stability. The vocalis ligament, cricoarytenoid ligament, and conus elasticus are most important in controlling abduction, whereas the posterior cricoarytenoid muscle and conus elasticus are crucial in limiting adduction. The vocalis ligament prevents posterior displacement of the vocal process, while the cricoarytenoid ligament and a newly described ligament, the posterior capsular ligament, restricts anterior vocal process migration. Another ligament, the anterior capsular ligament, is described, which limits backward arytenoid cartilage tilting and lateral movement of the arytenoid cartilage on the cricoid cartilage facet. Section of the vocalis ligament with underlying conus elasticus produced reducible lateral arytenoid cartilage subluxation. Confirmation of cricoarytenoid joint facet relationships in full adduction and abduction was accomplished by fixation of the cricoarytenoid joints of one larynx in the two positions with adhesive, and subsequent exposure of the joint surfaces. Review of literature detailing human laryngeal embryological development shows that the glottis and arytenoid cartilages are formed in adduction, which explains how cricoarytenoid joint ligaments collaborate to achieve accurate vocal process approximation in adduction despite side-to-side asymmetries of the cricoarytenoid joint structures in the same larynges.
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Affiliation(s)
- R C Wang
- Division of Otolaryngology-Head and Neck Surgery, University of Nevada School of Medicine, Las Vegas 89102, USA
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Wang RC, Keech DR, Elkins TP, Russell P. The tension wire method: a simple, effective means of mandibular fixation. Arch Otolaryngol Head Neck Surg 1998; 124:448-52. [PMID: 9559695 DOI: 10.1001/archotol.124.4.448] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To investigate the use of a tension wire band secured to monocortical screws for open reduction and internal fixation of simple, displaced, and/or unstable mandibular fractures. DESIGN Retrospective review with follow-up duration of at least 6 weeks. SETTING Level I university trauma center. PATIENTS Twenty-nine patients (27 males and 2 females), aged 7 to 46 years. Ten patients had unilateral fractures (1 patient had 3 separate unilateral fractures) and 19 had bilateral fractures; 34 of 50 fractures were displaced; 19 were open intraorally. The location of fractures and the number (number repaired) were as follows: symphysis or parasymphysis, 13 (10); body, 9 (8); angle, 18 (14); ramus, 6 (4); and subcondylar, 4 (0). Two fractures were each comminuted into 3 fragments, and 1 patient had unilateral parasymphysial, body, and ramus fractures. INTERVENTION Intermaxillary fixation was done in all patients except 1 child. Intraoral approaches were used exclusively. A pair of monocortical 2.0-mm screws were placed perpendicular to fracture lines, with 24-gauge wire loops passed around the screws and tightened to bring the fracture into reduction and provide stable fixation. A percutaneous trocar system was used to insert screws at the body, angle, and ramus sites. RESULTS There were no instances of infection, malunion, or malocclusion in the 33 fractures repaired with this technique. A typical intermaxillary fixation with open reduction and internal fixation of a posterior fracture was done in less than 2 hours. CONCLUSION Open reduction and internal fixation of simple mandibular fractures with tension wire bands around monocortical screws is a simple, quick, and effective technique.
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Affiliation(s)
- R C Wang
- Division of Otolaryngology-Head and Neck Surgery, Texas Tech University Health Sciences Center, Lubbock, USA
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22
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Abstract
Eighty-two children underwent polysomnography (PSG) for symptoms suggestive of obstructive sleep apnea (OSA). Symptoms reported included snoring, witnessed apneic episodes, daytime somnolence, mouth breathing, and enuresis. Tonsillar size, nasal airway patency, and percentile weight were recorded. OSA was diagnosed on PSG when obstructive events were noted and apnea + hypopnea index was five or more per hour. The overall predictive accuracy of clinical suspicion of OSA was 25 (30%) of 82. Predictive accuracies (as a percentage of those with symptoms/signs who have OSA) and prevalences (as a percentage of those with OSA who have the symptom/sign), respectively, were for moderate snoring 29% (12 of 41), 48%; loud snoring 31% (11 of 35), 44%; witnessed apneas 32% (22 of 69), 88%; enuresis 46% (11 of 24), 44%; 2+ tonsillar size 37% (21 of 57), 84%; 3+ tonsillar size 33% (3 of 9), 12%; 90th percentile weight or greater 26% (7 of 27), 28%; 10th percentile weight or less 33% (5 of 15), 20%. Multiple regression analysis did not reveal a significant association between clinical parameters and the presence of OSA as defined by PSG.
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Affiliation(s)
- R C Wang
- Division of Otolaryngology-Head and Neck Surgery, Texas Tech University Health Sciences Center, Lubbock, USA
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Abstract
PURPOSE To present a new method of surgical treatment for rhino-orbital mucormycosis. METHOD We treated a patient with extensive surgical debridement of mucormycosis with intraoperative frozen section guidance. The patient did not require exenteration. RESULT Our patient survived with normal vision and no diplopia. CONCLUSIONS Frozen section-guided surgical debridement in rhino-orbital mucormycosis may provide an alternative to traditional radical surgical excision. In selected cases, this new method of treatment may cause less morbidity than do traditional treatments.
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Affiliation(s)
- J D Langford
- Department of Ophthalmology, West Virginia University, Morgantown 26506-9193, USA.
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Wong CY, Wang RC, Wu JS. Schwinger particle-production mechanism for a finite-length flux tube with transverse confinement. Phys Rev D Part Fields 1995; 51:3940-3943. [PMID: 10018862 DOI: 10.1103/physrevd.51.3940] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Kao CH, Wang RC, Lin HT, Yu SL, Wang SJ, Chiang CD. Alveolar integrity in pulmonary emphysema using technetium-99m-DTPA and technetium-99m-HMPAO radioaerosol inhalation lung scintigraphy. J Nucl Med 1995; 36:68-72. [PMID: 7799085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
UNLABELLED The alveolar integrity (AI) in 17 male patients with pulmonary emphysema (EMPH) diagnosed by chest x-ray was measured by 99mTc-DTPA and 99mTc-HMPAO radioaerosol inhalation lung scintigraphy. METHODS The patients were divided into two groups: (A) nine patients with pulmonary emphysema and normal carbon monoxide diffusion capacity (DLCO) and (B) eight patients with pulmonary emphysema and abnormal DLCO. The degree of AI damage in EMPH was presented as the slope of the time-activity curves from the dynamic left lung imagings in DTPA and HMPAO. The AI of EMPH patients were compared with the AI of 16 normal controls. RESULTS The results show that: (1) the slope of DTPA is larger than that of HMPAO in each of the portions of the left lung for any of the study groups; (2) statistical differences were found between the normal controls and EMPH patients in HMPAO but not in DTPA; and (3) the correlation was not good between DLCO and DTPA/HMPAO in EMPH patients. CONCLUSION Our results suggest that: (1) at least two different mechanisms in the lungs were at work; (2) the AI damage in EMPH developed mainly in the lipophilic part of the alveoli; and (3) the AI damage presented as slopes of DTPA/HMPAO in our study was different from the traditional pulmonary function such as DLCO.
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Affiliation(s)
- C H Kao
- Department of Nuclear Medicine, Taichung Veterans General Hospital, Taiwan, Republic of China
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26
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Hsu WH, Chiang CD, Wang RC, Chiang CS, Hsu JY. Apical malignancies diagnosed by ultrasound-guided fine needle aspiration biopsy. J Formos Med Assoc 1993; 92:983-7. [PMID: 7910070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Sixteen patients with apical malignancies, including 12 with Pancoast tumors and four with metastatic apical pleural masses, underwent chest ultrasound (US) examinations and direct percutaneous fine needle aspiration biopsy (FNAB). Of those, 15 patients were proven to have malignancies by FNAB and the remaining patient (only revealing necrosis by FNAB) was also proven to have a Pancoast tumor after surgical intervention. Percutaneous FNAB was performed through the supraclavicular approach (n = 10) or through the upper back (n = 6). The sonographic appearances of the apical malignancies were homogeneous hypoechoic (n = 8), homogeneous isoechoic (n = 3) or heterogeneous (n = 5). No complications occurred after the FNAB. Our limited experience showed that a convex probe was convenient and useful in the detection of apical malignancies. Apical malignancies, diagnosed previously by percutaneous needle aspiration under fluoroscopy or surgical intervention, can be easily diagnosed by percutaneous FNAB, especially when the FNAB is performed using the supraclavicular approach.
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Affiliation(s)
- W H Hsu
- Department of Internal Medicine, Taichung Veterans General Hospital, Taiwan, R.O.C
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27
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Lynch MJ, Pelosi L, Carboni JM, Merwin J, Coleman K, Wang RC, Lin PF, Henry DL, Brattain MG. Transforming growth factor-beta 1 induces transforming growth factor-alpha promoter activity and transforming growth factor-alpha secretion in the human colon adenocarcinoma cell line FET. Cancer Res 1993; 53:4041-7. [PMID: 8358733] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
FET cells are well differentiated human adenocarcinoma cells whose growth is partially inhibited (50-60%) by transforming growth factor-beta 1 (TGF-beta 1). In exponentially growing cultures, TGF-beta 1 induces the expression of transforming growth factor-alpha (TGF-alpha) by 3-fold. To determine whether this induction is the result of increased TGF-alpha promoter activity, FET cells were transiently transfected with a plasmid containing 2816 base pairs of the 5'-flanking region of the TGF-alpha gene linked to luciferase. Transfected FET cells treated with growth-inhibitory concentrations of TGF-beta 1 (10 ng/ml) showed up to a 10-fold increase in luciferase activity. The increase in luciferase activity was dose dependent through the normal physiological range of TGF-beta 1 (0.5-20 ng/ml), saturating at 10 ng/ml. This effect was also TGF-alpha promoter specific, inasmuch as the Rous sarcoma virus long terminal repeat used as a control remained relatively insensitive to the effects of TGF-beta 1. By using progressively smaller portions of the TGF-alpha promoter region, the TGF-beta 1-responsive element was mapped between base pairs -77 and -201 of the 5'-flanking region. TGF-beta 1 treatment also affected epidermal growth factor receptor levels. FET cells treated with TGF-beta 1 (10 ng/ml) for 48 h showed a 20% decrease in the number of epidermal growth factor receptors and a 2-fold increase in the number of high affinity epidermal growth factor receptors on their surface. These results indicate that TGF-beta 1 acts as a positive regulator of TGF-alpha transcription, and they suggest a possible mechanism by which these cells circumvent the growth-inhibitory effects of TGF-beta 1.
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Affiliation(s)
- M J Lynch
- Bristol-Myers Squibb, Princeton, New Jersey 08540
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Abstract
Airway management of supraglottitis in the adult is controversial as regards the choice between observation and acute intervention. This study was undertaken to determine whether factors exist that place patients at higher risk of airway obstruction and to review conservative treatment outcome. Of 46 cases during an 8-year period, seven required tracheostomy and 39 were observed. Odynophagia and fever were present in all patients. Yearly clusters of up to six cases in 1 month were detected. White blood cell count and heart rate were significantly more elevated in those who underwent tracheostomy. A symptom duration of less than 24 hours was associated (p < 0.05, chi 2 analysis) with airway compromise as well. There was no associated morbidity or mortality, and mean hospital stay was 5.2 days for those observed and 7.9 days for those who underwent tracheostomy.
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Affiliation(s)
- H N Barrow
- Department of Otolaryngology, Manhattan Eye, Ear, and Throat Hospital, Lubbock, TX
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29
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Wang BJ, Lee JY, Wang RC. Fiberglass dermatitis: report of two cases. J Formos Med Assoc 1993; 92:755-8. [PMID: 7904853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Fiberglass is widely used for insulation and as a reinforcement filling material. Handling fiberglass products may induce contact dermatitis. We report on the first two cases of fiberglass dermatitis reported in Taiwan. The first patient suffered from a severe pruritic eruption two hours after repairing a roof with wave-form ceiling boards. Erythematous maculopapules were present on both hands and finger webs. The second patient was a quality controller of printed circuit boards (PRCBs). She presented with erythematous maculopapules on the face and excoriated papules and lichenified plaques on the trunk and forearms, which had been present for two years. Scrapings of the skin lesions from both patients showed fiberglass spicules of 7.5 to 8 microns in diameter. Similar fibers were detected in scrapings from the wave-form ceiling board and PRCB. Histopathology of the second case revealed spongiotic psoriasiform dermatitis. Patch tests in case 2 with the plastics and glues series, epoxy resin and scrapings from the PRCBs were all negative. Fiberglass dermatitis may be easily misdiagnosed. Clinically, it may resemble scabies, eczematous dermatitis, folliculitis, petechiae and urticaria. A high index of suspicion is essential for a correct diagnosis.
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Affiliation(s)
- B J Wang
- Department of Dermatology, National Cheng-Kung University Hospital, Tainan, Taiwan, R.O.C
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30
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Wientjes MG, Badalament RA, Wang RC, Hassan F, Au JL. Penetration of mitomycin C in human bladder. Cancer Res 1993; 53:3314-20. [PMID: 8324743] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The penetration of mitomycin C (MMC) in bladder tissue was studied in patients who received intravesical chemotherapy at the time of radical cystectomy. An intravesical dose of MMC (20 mg/40 ml) was instilled and maintained in the bladder for 60 to 120 min at which time the solution was drained. Within 10 to 60 min after draining the drug solution, the bladder vasculature was ligated, and the bladder was removed. Tissues were sectioned serially in layers parallel to the urothelium and analyzed for MMC concentration. Of the 24 patients evaluated, 17 patients had a low final MMC concentration in urine (< 66 micrograms/ml) or had the MMC solution drained more than 30 min before ligation of the blood vessels. Among these 17 patients, the concentration in the urothelium was measurable in only 4 patients, while the concentrations in deeper tissues were not measurable. In the remaining 7 patients where the urine concentration was > 120 micrograms/ml and where the vasculature was ligated within 30 min after the MMC solution was drained, the bladder wall contained significant MMC concentrations. The drug penetration was studied in the latter 7 patients, using sections of bladder wall that were grossly normal and non-tumor bearing. Concentrations in the bladder wall declined semilogarithmically with tissue depth from the urothelium to the deep muscle and reached a plateau at about 2000 microns depth. The median MMC concentrations were 5.6 micrograms/g in the urothelium and lamina propria interface, 2.7 micrograms/g in the lamina propria, and 0.9 microgram/g in the muscularis. The distance over which the MMC concentration decreased by one-half was about 500 microns. The concentration ratio between the urine and urothelium/lamina propria interface was about 35-fold. The mean plasma concentrations were 0.003, 0.1, and 0.4% of the mean concentration in urine, urothelium, and the averaged bladder tissue concentrations, respectively. Paired superficial tumor and normal tissues were obtained from 5 bladders. In 4 of 5 cases, the concentration in tumors was higher than in normal tissues, while the reverse was seen in the remaining tumor. In one sessile bladder tumor a complete concentration-depth profile could be obtained. While the concentrations in the tumor tissue were 2-3-fold higher than that in the adjacent normal tissue, the rate of concentration declined with respect to tissue depth and hence the distance over which the MMC concentration decreased by one-half was similar in both tumors.(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- M G Wientjes
- Division of Urology, Ohio State University, Columbus 43210-1228
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31
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Wang RC, Chiang CD, Chu JJ. Serodiagnosis of tuberculosis by an enzyme-linked immunosorbent assay using mycobacterial antigen 60. Zhonghua Yi Xue Za Zhi (Taipei) 1992; 50:14-8. [PMID: 1326380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
This study was undertaken to assess the diagnostic utility of an enzyme-linked immunosorbent assay using mycobacterial antigen 60 in patients with pulmonary tuberculosis. This test was applied to 210 adults, including 111 patients with active pulmonary tuberculosis, 80 control subjects and 19 patients with inactive pulmonary tuberculosis. Although the serums from the patients with active tuberculosis has a higher mean value of IgG antibody concentration than the control group, there was a considerable overlap of serum IgG antibody level between the two groups. 200 ELISA unit (EU) was established as a reasonable cut-off value, which gave an 80.2% (89/111) sensitivity for the group with active pulmonary tuberculosis and a specificity of 76.3% (61/80) only for the control group. The patients with inactive pulmonary tuberculosis had a positive rate up to 47.4% (9/19) when 200 EU was chosen as a cut-off value.
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Affiliation(s)
- R C Wang
- Department of Medicine, Veterans General Hospital-Taichung, Taiwan, R.O.C
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Wang SY, Wang RC, Chen LY, Lieu CW, Su SN, Yung CH, Ho CK. Purification and characterization of human macrophage-derived granulomonopoietic enhancing factor (GM-EF). Exp Hematol 1992; 20:552-7. [PMID: 1375159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A granulomonopoietic enhancing factor (GM-EF) capable of promoting the effect of colony-stimulating factors (CSFs) on myeloid progenitor cells has been purified to homogeneity from serum-free medium conditioned by fully mature human macrophages. GM-EF was a glycoprotein with an apparent molecular weight of 74 kd and an isoelectric point of 5.2-5.3. The purified protein was heat stable (75 degrees C for 30 min) and was sensitive to treatment with trypsin, papain, and bacterial protease but not to neuraminidase. The activity of GM-EF could be effectively neutralized by GM-EF-specific antiserum, and no antigenic cross-reactivity was observed using antisera against interleukin (IL)-1, IL-4, and IL-6. These results suggest that GM-EF is a unique cytokine that is different biochemically and antigenically from other hematopoietic enhancing factors such as IL-1, IL-4, and IL-6.
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Affiliation(s)
- S Y Wang
- Department of Medical Research, Veterans General Hospital-Taipei, Taiwan, Republic of China
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Abstract
Two hundred forty-seven patients, followed up a mean of 18 months and up to 108 months, were retrospectively studied for problems related to or affecting tracheoesophageal puncture for voice restoration. Active cases, as well as those inactive and decreased, were included. There were 154 patients with primary and 93 with secondary tracheoesophageal puncture. Problems were encountered at least once in 137 cases (55%). The 20 types of problems identified occurred in frequencies ranging from 0.4% to 21%. Most difficulties developed within the first 6 months and in general were easily managed. However, problems such as recalcitrant leakage, difficulty with changing the prosthesis, and dislodgment of the prosthesis led to permanent tracheoesophageal puncture tract closure in 18 patients (7%).
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Affiliation(s)
- R C Wang
- Department of Otolaryngology, Manhattan Eye, Ear, and Throat Hospital, New York, NY 10021
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Long BH, Wang L, Lorico A, Wang RC, Brattain MG, Casazza AM. Mechanisms of resistance to etoposide and teniposide in acquired resistant human colon and lung carcinoma cell lines. Cancer Res 1991; 51:5275-83. [PMID: 1717144] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Stable acquired resistance to etoposide (VP-16) or teniposide (VM-26) in HCT116 human colon carcinoma cells and A549 human lung adenocarcinoma cells, was previously obtained by weekly 1-h exposures to either drug (B. H. Long, Natl. Cancer Inst. Monogr., 4: 123-127, 1987). The purpose of this study was to identify possible mechanisms of resistance present in these cells by using human mdr1 and topoisomerase II DNA probes, antibodies to these gene products, and P4 phage unknotting assay for topoisomerase II activities. HCT116(VP)35 cells were 9-, 7-, and 6-fold resistant to VP-16, VM-26, and Adriamycin, respectively, and showed no cross-resistance to colchicine and actinomycin D. These cells had no differences in mdr1 gene, mdr1 mRNA, or P-glycoprotein levels but displayed decreased levels of topoisomerase II mRNA and enzyme activity without any alteration of drug sensitivity displayed by the enzyme. HCT116(VM)34 cells were 5-, 7-, and 21-fold resistant to VP-16, VM-26, and Adriamycin; were cross-resistant to colchicine (7-fold) and actinomycin D (18-fold); and possessed a 9-fold increase in mdr1 mRNA and increased P-glycoprotein without evidence of mdr1 gene amplification. No alterations in topoisomerase II gene or mRNA levels, enzyme activity, or drug sensitivity were observed. A549(VP)28 and A549(VM)28 cells were 8-fold resistant to VP-16 and VM-26 and 3-fold resistant to Adriamycin. Both lines were not cross-resistant to colchicine or actinomycin D but were hypersensitive to cis-platinum. No alterations in mdr1 gene, mdr1 mRNA, or P-glycoprotein levels, but lower topoisomerase II mRNA levels and decreased enzyme activities, were observed. Of the four acquired resistant cell lines, resistance is likely related to elevated mdr1 expression in one line and to decreased topoisomerase II expression in the other three lines.
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Affiliation(s)
- B H Long
- Department of Experimental Therapeutics, Bristol-Meyers Squibb Company, Wallingford, Connecticut 06492
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Affiliation(s)
- S C Parisier
- Department of Otolaryngology, Manhattan Eye, Ear and Throat Hospital, New York
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Wang RC, Seror SJ, Blight M, Pratt JM, Broome-Smith JK, Holland IB. Analysis of the membrane organization of an Escherichia coli protein translocator, HlyB, a member of a large family of prokaryote and eukaryote surface transport proteins. J Mol Biol 1991; 217:441-54. [PMID: 1994034 DOI: 10.1016/0022-2836(91)90748-u] [Citation(s) in RCA: 112] [Impact Index Per Article: 3.4] [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
Haemolysin B (HlyB) is essential for secretion of the 107 x 10(3) Mr haemolysin A protein from Escherichia coli and is a member of a family of highly conserved, apparently ATP-dependent surface proteins in many organisms. We have shown in this study that both HlyB and HlyD fractionate primarily with the cytoplasmic membrane of E. coli and are accessible to proteases after removal of the outer membrane. We have measured experimentally the topological organization of HlyB within the membrane by construction of fusions to beta-lactamase as a reporter. The predicted folding of HlyB, with a minimum of six transmembrane segments, does not always coincide with regions of highest average hydrophobicity. This suggests that HlyB may have a novel organization within the bilayer. From our data and comparative sequence analysis, we have been able to predict very similar topological models for the other members of the HlyB family.
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Affiliation(s)
- R C Wang
- Agricultural University, Beijing, Republic of China
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Abstract
We analyzed retrospectively 157 cases of metastatic neck squamous cell carcinoma from unknown primary sites, treated with surgery, radiotherapy, excisional biopsy, and combined modalities. Median follow-up was 74 months, and overall actuarial survival was 55% at 5 years. The surgery-treated group, despite a higher rate of manifesting primary tumors, had significantly better survival at 5 years compared with those receiving radiation therapy, of whom 23% had residual disease after treatment. Primary tumors were discovered during follow-up in 16% overall. Different treatments yielded comparable results in lower-staged neck disease (NX, N1, N2a), while surgery appeared more effective in controlling advanced disease (N2b, N3a). Factors that affected survival include neck stage, connective tissue invasion, and presence of recurrent or residual disease after treatment.
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Affiliation(s)
- R C Wang
- Department of Head and Neck Surgery, University of Texas, M.D. Anderson Cancer Center, Houston 77030
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Abstract
In a series of 52 patients who received cochlear implants, 4 patients suffered flap complications (7.7%). The problems encountered involved the postauricular flap and were usually minor in nature. None required explantation as a direct result of these complications. Flap ischemia in a patient with Cogan's syndrome and vasculitis, two cases of suture extrusion with one having exposure of the implant, and a case of receiver unit magnet extrusion repaired with a vascularized pericranial flap based upon temporalis muscle are presented. Flap design in patients who have had postauricular incisions demands special consideration. Principles useful for avoiding complications as well as their management are discussed.
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Affiliation(s)
- R C Wang
- Department of Otolaryngology, Manhattan Eye, Ear and Throat Hospital, New York, NY 10021
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Wang SY, Li YM, Chen LY, Wang RC, Lin CK, Ho CK. Detection of the target progenitor cells of granulomonopoietic enhancing activity. Blood 1990; 76:495-500. [PMID: 2198958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Macrophage-derived granulomonopoietic enhancing activity (GM-EA) is a novel mediator that amplifies colony formation of myeloid progenitor cells (CFU-GM) in conjunction with colony-stimulating factors (CSFs), and is distinct from other hematopoietic synergizing factors such as interleukin (IL)-1, IL-4, and IL-6. In the present study, we try to ascertain whether or not there is a GM-EA-specific responsive myeloid progenitor cell population. Human bone marrow cells deleted of adherent cells and T lymphocytes were separated by velocity sedimentation into three subpopulations with respective sedimentation rates (millimeters per hour) of 7.4 +/- 0.4, 6.0 +/- 0.6, and 4.7 +/- 0.3. These subpopulations corresponded to the day 7 CFU-GM, day 14 CFU-GM, and the earlier myeloid progenitor cells, pre-CFU-GM, respectively. Pre-CFU-GM failed to respond to the colony-inducing effect of GM-CSF but could be stimulated by GM-EA alone to generate small clusters (5 to 25 cells) in soft agar after 14 days of incubation. Correspondingly, suspension preculture of the fractionated bone marrow cells also showed that only the progenitor cells with low sedimentation rate (4.7 mm/h) could be activated by GM-EA to generate CFU-GM. Taken together, our results suggest that the specific target cell of GM-EA is the pre-CFU-GM, and that GM-EA acts on these cells as a growth/maturation factor, but on the day 7 and day 14 CFU-GM as a synergistic growth factor.
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Affiliation(s)
- S Y Wang
- Department of Medical Research, Veterans General Hospital, Taiwan, Republic of China
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Abstract
Infectious complications of tracheotomy range from minor to potentially fatal. Three cases are presented: clavicular osteomyelitis; innominate artery blowout with mediastinitis; and the first reported case of necrotizing fasciitis involving the chest wall related to tracheotomy infection. All patients were debilitated, with one diabetic and another steroid-dependent. Infectious sequelae occurred as late as 8 weeks following tracheotomy. The mechanism, treatment, and prevention of tracheotomy infections are reviewed. Indications for the creation of a permanent but reversible tracheostome should be expanded to prevent infections in debilitated or immunosuppressed patients in whom decannulation is unlikely.
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Affiliation(s)
- R C Wang
- Division of Otolaryngology, Albany Medical College, New York
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Wang SY, Ho CK, Chen LY, Wang RC, Huang MH, Castro-Malaspina H, Moore MA. Down regulation of myelopoiesis by mediators inhibiting the production of macrophage-derived granulomonopoietic enhancing activity (GM-EA). Blood 1988; 72:2001-6. [PMID: 3143428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Monocyte-derived lipid-containing macrophages (MDLMs) constitutively synthesize a granulomonopoietic enhancing activity (GM-EA) that potentiates the function of granulocyte-macrophage colony-stimulating activity (GM-CSA). In the study reported, we show that GM-EA is distinct from interleukin-1 (IL-1) in biochemical and functional properties and that its production is negatively regulated by several mediators. Thus, MDLM cultures pretreated with interferon-gamma (IFN-gamma, 3 to 900 U/mL), prostaglandin E2 (PGE2, 10(-13) to 10(-8) mol/L), or lactoferrin (LF, 10(-13) to 10(-8) mol/L) invariably produced less GM-EA than untreated controls. The relative potency of inhibition was in the order of IFN-gamma greater than or equal to PGE2 greater than LF. The extent of the inhibitory effects was proportional to dosage and the duration of treatment and could be observed following only a brief exposure (two hours) of the MDLMS to physiologic doses of the mediators. Under optimal conditions, IFN-gamma (300 U/mL for 24 to 48 hours) and PGE2 (10(-9) mol/L for 24 to 48 hours) could totally abrogate the ability of the MDLMs to produce GM-EA. However, the drug-inhibited MDLMs could be reactivated to produce GM-EA by treatment with zymosan (60 micrograms/mL). These results demonstrate that a mechanism for the control of myelopoiesis by mediators such as IFN-gamma, PGE2, and LF may involve the inhibition of GM-EA production. Furthermore, this negative feedback control is reversible and can be overridden when a proper stimulatory signal is given.
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Affiliation(s)
- S Y Wang
- Department of Medical Research, Veterans General Hospital, Taipei, Taiwan, Republic of China
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Firth WJ, Messa A, Reid R, Wang RC, Watkins CL, Yielding LW. Identification of an acridine photoaffinity probe for trypanocidal action. J Med Chem 1984; 27:865-70. [PMID: 6737429 DOI: 10.1021/jm00373a010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Twenty-four acridine derivatives were screened for trypanocidal activity in Trypanosoma brucei in order to determine which structural features of the acridine molecule confer maximal antiparasitic activity. The synthesis of several new azidoacridine derivatives are also reported as well as an assessment of their value as possible photoaffinity probes for the study of acridine trypanocidal action. The most effective and selective acridine trypanocides, with and without irradiation, were the 3-amino-10-methylacridinium salt derivatives. With brief irradiation, one azidoacridine, 3-amino-6-azido-10-methylacridinium chloride, showed considerable trypanocidal activity at very limiting drug concentrations (10(-7)M) and warrants consideration as a possible photoaffinity probe.
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Wang RC, Chen WC, Lee PK, Shen E. [Coronary arteriographic findigs among Chinese patients in Hong Kong]. Zhonghua Nei Ke Za Zhi 1982; 21:285-7. [PMID: 7128290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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Wang RC, Liang GH, Heyne EG. Effectiveness of ph gene in inducing homoeologous chromosome pairing in agrotricum. Theor Appl Genet 1977; 51:139-142. [PMID: 24317691 DOI: 10.1007/bf00273826] [Citation(s) in RCA: 6] [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] [Received: 05/05/1977] [Indexed: 06/02/2023]
Abstract
We observed pairing, when the ph gene was present, between wheat (Triticum aestivum L. em. Thell.) chromosome 4B, and an Agropyron intermedium (Host) Beauv. chromosome (Ai) carrying a gene resistant to wheat streak mosaic (WSM). In a monosomic addition polyhaploid [2n = 22 = 19' + 5B' (ph) + 4B' + Ai'], we recorded an average of 4.1 bivalents and 0.3 trivalents per cell. Induced homoeologous pairing was most effective when both 5B chromosomes carrying ph gene were present. Our data suggest that chromosome 4B of wheat and the Agropyron chromosome (Ai) carrying a gene for resistance to WSM are homoeologous and that it is possible to use either ph mutant or nullisomic 5B stock to induce genetic recombination between the two chromosomes.
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Affiliation(s)
- R C Wang
- Department of Agronomy, Kansas State University, Manhatten, USA
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