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Shang D, Liu SM. [Clinical manifestation of odontogenic fibroma associated with tuberous sclerosis complex: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:186-188. [PMID: 35152656 DOI: 10.3760/cma.j.cn112144-20210524-00262] [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: 06/14/2023]
Affiliation(s)
- D Shang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
| | - S M Liu
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Research Center of Oral Biomaterials and Digital Medical Devices & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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Xia C, Yang S, Liu J, Lu J, Shang D, Fu D, Zhao Z, Wang X. Finite element study on whether posterior upper wall fracture is a risk factor for the failure of short-segment pedicle screw fixation in the treatment of L1 burst fracture. Injury 2021; 52:3253-3260. [PMID: 34521540 DOI: 10.1016/j.injury.2021.08.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/04/2021] [Accepted: 08/13/2021] [Indexed: 02/02/2023]
Abstract
PURPOSE To establish the finite element model of T12 and L2 (T12-L2) pedicle screw fixation for severe L1 burst fracture, and quantitatively simulate and analyze the screw stress and vertebral displacement in different degrees of L1 posterior upper wall fracture (PUWF), and evaluate whether PUWF degree is a risk factor for fixation failure. METHODS The data of 6 healthy volunteers were used to establish a finite element model of T12-L2 pedicle screw fixation for type A severe burst fractures. The stress and displacement of the conventional and Schanz pedicle screws for the different degrees of PUWF (including the anterior upper wall of the vertebral canal and the bipedicle) were evaluated. RESULTS The maximum stress and L1 displacement of conventional and Schanz pedicle screws were positively correlated with the severity of the PUWF (P<0.05). During anterior flexion, the maximum stress of conventional pedicle screws for 70% type I were 538.3±59.75MPa and the maximum stress of Schanz pedicle screws for 90% type Ⅱ, 90% type Ⅲ and 70% type IV fractures were close to the fatigue threshold. The maximum stress during anterior flexion were significantly higher than those during posterior extension, bending and rotation (P<0.05). CONCLUSION The posterior upper wall fracture of vertebral body (VB) of type A burst fracture is not an independent risk factor for the failure of short-segment pedicle screw fixation (SSPSF). Anterior flexion of type A fractures combined with severe PUWF of VB was a risk factor for the failure of SSPSF.
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Affiliation(s)
- Chunyang Xia
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China.
| | - Sheng Yang
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China.
| | - Jifeng Liu
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China; Department of Orthopaedics, Yantai Hospital of Shandong Wendeng Orthrpaedics & Traumatology, Shanhai South Road, Laishan district, Yantai 264003, Shandong Province, China.
| | - Jianmin Lu
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China.
| | - Depeng Shang
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China.
| | - Dapeng Fu
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China.
| | - Zhenhua Zhao
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China.
| | - Xiahua Wang
- Department of Orthopedics, Affiliated Zhongshan Hospital of Dalian University, 6 Jiefang Street, Dalian, Liaoning 116001, China.
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Huang W, Liu T, Duan R, Yuan Y, Qu M, Zhang M, Shang D, Yu X. Primary multiple angiosarcoma of vertebra: A case report. Medicine (Baltimore) 2020; 99:e23587. [PMID: 33327321 PMCID: PMC7738032 DOI: 10.1097/md.0000000000023587] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
RATIONALE Angiosarcoma is a rare malignant tumors. The objective of this study is to report a patient who suffered from a progressive low back pain and left lower extremities radiation pain for about 8 months, After diagnoses, this was identified as an extremely rare case of primary multiple angiosarcoma of vertebra. PATIENT CONCERNS A 54-year-old man with a history of 2-year hypertension and 8-year diabetes, both of which were well controlled by drug management. Lately, he suffered from a progressive low back pain and left lower extremities radiation pain for about 8 months. DIAGNOSES Magnetic resonance imaging of lumbar showed a clear pathological fracture and primary multiple angiosarcoma of all vertebra. Postoperative pathology and High-throughput sequencing confirmed the diagnosis of primary multiple angiosarcoma of vertebra. INTERVENTIONS The patient underwent minimally invasive pedicle screw fixation combined with bone cement augmentation for the purpose of stabilizing the damaged vertebrae. Following operation, he received both radiotherapy and chemotherapy for a period of time. OUTCOMES The operation has achieved positive results in relieving pain and stabilizing the spine. No wound problem or operative complications occurred after operation. The patient reported an obvious remission of low back pain and was only capable to perform restricted physiological activities. A long-term palliative radiotherapy and chemotherapy were performed after operation. Unfortunately, the patient died 18 months later. CONCLUSION This article emphasizes primary multiple angiosarcoma of vertebra. Despite being rare, it should be part of the differential when the patient manifested back pain and radiculopathy. We recommended the minimally invasive pedicle screw fixation for angiosarcoma of vertebra. Osteoplasty by bone cement augmentation was also an ideal choice for surgical treatment. It also advocates the use of specific targeted radiotherapy drugs based on gene analysis of tumors.
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Affiliation(s)
- Wei Huang
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
- Department of Spine Surgery, Dongguan Tungwah Hospital, Dongguan, 523000, China
| | - Tao Liu
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
| | - Ruimeng Duan
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
| | - Yashuai Yuan
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
| | - Mingjia Qu
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
| | - Meng Zhang
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
| | - Depeng Shang
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
| | - Xiaobing Yu
- Department of Orthopaedics, Zhongshan Hospital of Dalian University, Dalian, 116001, China
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Li X, Shang D, Shen H, Song J, Hao G, Tian Y. Corrigendum to “ZSCAN16 promotes proliferation, migration and invasion of bladder cancer via regulating NF-kB, AKT, mTOR, P38 and other genes” [Biomed. Pharmacother. 126 (2020) 110066]. Pharmacotherapy 2020; 130:110858. [DOI: 10.1016/j.biopha.2020.110858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Shang D, Ma L. [Ectrodactyly ectodermal dysplasia-cleft lip/palate syndrome: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2019; 54:770-772. [PMID: 31683385 DOI: 10.3760/cma.j.issn.1002-0098.2019.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- D Shang
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081 China (Shang Duo is working on the Department of Oral Maxillofacial Surgery, Affiliated Hospital of Inner Mongolia Medical University, Huhhot 010059, China)
| | - L Ma
- Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China
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Guo M, Zhang Y, Shang D, Yu J, Yue J. 18F-Fluorodeoxyglucose Positron Emission Tomography May not Quantify Aseptic Radiation-induced Lung Inflammation. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Yang S, Lu J, Fu D, Shang D, Zhou F, Liu J, Cao M. Effect of microscopically assisted decompression with micro-hook scalpel in the surgical treatment of ossification of the posterior longitudinal ligament. J Int Med Res 2019; 47:5120-5129. [PMID: 31426689 PMCID: PMC6833369 DOI: 10.1177/0300060519862464] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Objective This study was performed to investigate the effect of microscopically assisted decompression using a micro-hook scalpel on ossification of the posterior longitudinal ligament (OPLL). Methods Sixty-one patients with OPLL were divided into Group A (posterior surgery with laminectomy of the responsible segment and lateral mass screw fixation) and Group B (anterior cervical corpectomy with intervertebral titanium cage fusion). Neurological function was assessed by the Japanese Orthopaedic Association (JOA) score, visual analog scale (VAS) score, and recovery rate. The fixation status and the result of spinal canal decompression were radiographically assessed. Results In Groups A and B, the JOA score was significantly higher and the VAS score was significantly lower at 1 week postoperatively and at the final follow-up than during the preoperative period. The mean recovery rate in Group A and B was 59.92% ± 13.46% and 62.28% ± 14.00%, respectively. Postoperative radiographs showed good positioning and no damage to the internal fixation materials. The spinal canal was also fully decompressed. Conclusions Microscopically assisted decompression with a micro-hook scalpel in both anterior and posterior surgeries achieved good clinical effects in patients with OPLL.
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Affiliation(s)
- Sheng Yang
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, P.R. China
| | - Jianmin Lu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, P.R. China
| | - Dapeng Fu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, P.R. China
| | - Depeng Shang
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, P.R. China
| | - Fei Zhou
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, P.R. China
| | - Jifeng Liu
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, P.R. China
| | - Meng Cao
- Department of Orthopaedics, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, P.R. China
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Liu J, Yang S, Lu J, Fu D, Liu X, Shang D. Biomechanical effects of USS fixation with different screw insertion depths on the vertebrae stiffness and screw stress for the treatment of the L1 fracture. J Back Musculoskelet Rehabil 2018; 31:285-297. [PMID: 29332029 DOI: 10.3233/bmr-169692] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
OBJECTIVE To evaluate the biomechanical effects of internal fixation with different screw insertion depths on vertebrae stiffness and screw stress for L1 fracture. METHODS The established L1 fracture was fixed with 10 different depths of screw insertion: 10-100% screw-path length (SPL). Loading on the T12 endplate was simulated. RESULTS Screws inserted to 60-100% depths has a higher axial displacement of screw against injured vertebrae and maximum stress of screws compared to those of screws inserted to 30-50% depths and 10-20% (P< 0.05). No significant difference was noted among 60-100% SPL groups. Under single loading condition, the incidence rate of maximum stress of each screw ranged from 16.7-50.0%. Chi-square test showed superior screw has a higher incidence rate of maximum stress than inferior screw (P< 0.05). CONCLUSIONS Screws inserted to 60% depth or more can achieve effective strength to withstand the postoperative height correction loss of the L1 vertebrae fracture. However, continuous prolonged depth of screw insertion did not significantly increase the effective strength of the screw against injured vertebrae and maximum equivalent stress of screws. The incidence rate of the maximum stress of each screw in correlated with position of screw insertion but not associated with the screw insertion depth.
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Liu H, Zhang P, Shang D, Shi X, Lu Z, Liu L, Shen M, Tu Z. TARGETING HEAT SHOCK PROTEIN 90 AND ITS DOWNSTREAM SIGNALING HUBS FOR THE TREATMENT OF MANTLE CELL LYMPHOMA. Hematol Oncol 2017. [DOI: 10.1002/hon.2439_171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- H. Liu
- School of Pharmacy; Jiangsu University; Zhenjiang China
| | - P. Zhang
- School of Pharmacy; Jiangsu University; Zhenjiang China
| | - D. Shang
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
| | - X. Shi
- Department of Hematology; Affiliated Hospital of Jiangsu University; Zhenjiang China
| | - Z. Lu
- School of Pharmacy; Jiangsu University; Zhenjiang China
| | - L. Liu
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
| | - M. Shen
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
| | - Z. Tu
- Institute of Life Sciences; Jiangsu University; Zhenjiang China
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Wang W, Qu X, Dang X, Shang D, Yang L, Li Y, Xu D, Martin JG, Hamid Q, Liu J, Chang Y. Human β-defensin-3 induces IL-8 release and apoptosis in airway smooth muscle cells. Clin Exp Allergy 2017; 47:1138-1149. [PMID: 28437599 DOI: 10.1111/cea.12943] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 04/12/2017] [Accepted: 04/14/2017] [Indexed: 12/23/2022]
Abstract
BACKGROUND Human airway smooth muscle cells (ASMCs) may have a pro-inflammatory role through the release of inflammatory mediators. Increasing evidence indicates that human β-defensins (HBDs) are related to pathogenesis of asthma. OBJECTIVES To examine the plasma level of HBD-1, HBD-2 and HBD-3 in asthmatic patients and the expression of their mouse orthologues in the lung tissue of a mouse model of chronic severe asthma. Further to investigate the effect of HBD-3 on the release of the pro-inflammatory cytokine IL-8 and to explore the mechanisms. METHODS The plasma levels of HBD-1, HBD-2 and HBD-3 from 34 healthy controls and 25 asthmatic patients were determined by ELISA. The expression of mouse β-defensins MBD-1, MBD-3 and MBD-14 in the lung tissue of asthmatic mice was detected by Western blot. The ASMCs were cultured with HBD-3 for 24 hour, and then the supernatant level of IL-8 was evaluated by ELISA and the cell viability was examined by WST-1 assay. The signalling pathway was investigated with blocking antibodies or pharmacological inhibitors. RESULTS The plasma levels of HBD-1 and HBD-3 were elevated in asthmatic patients, and the expression of MBD-14, the mouse orthologue for HBD-3, was increased in asthmatic mice. HBD-3-induced IL-8 production in a CCR6 receptor-specific manner and was dependent on multiple signalling pathways. Moreover, HBD-3-induced cell apoptosis concurrently, which was dependent on the ERK1/2 MAPK pathway. Mitochondrial ROS regulated both HBD-3-induced IL-8 production and cell apoptosis. CONCLUSIONS AND CLINICAL RELEVANCE These observations provide clear evidence of an important new mechanism for the promotion of airway inflammation and tissue remodelling with potential relevance for the treatment of asthma.
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Affiliation(s)
- W Wang
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - X Qu
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - X Dang
- Department of Respiration, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - D Shang
- Department of Respiration, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, China
| | - L Yang
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Li
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - D Xu
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - J G Martin
- Meakins-Christie Laboratories and Respiratory Division, The Research Institute of the McGill University Health Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada
| | - Q Hamid
- Meakins-Christie Laboratories and Respiratory Division, The Research Institute of the McGill University Health Centre and Department of Medicine, McGill University, Montreal, Quebec, Canada.,College of Medicine, University of Sharjah, Sharjah, United Arab Emirates
| | - J Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
| | - Y Chang
- Center for Translational Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology and Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, China
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Shang D, Wu J, Guo L, Xu Y, Liu L, Lu J. Metformin increases sensitivity of osteosarcoma stem cells to cisplatin by inhibiting expression of PKM2. Int J Oncol 2017; 50:1848-1856. [PMID: 28393220 DOI: 10.3892/ijo.2017.3950] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 03/20/2017] [Indexed: 12/17/2022] Open
Abstract
Multiple drug resistance is reported to be a major obstacle in treatment of osteosarcoma (OS). Research has demonstrated that small subsets of cells called cancer stem cells (CSCs) are responsible for multiple drug resistance. CSCs are potential targets for reversing chemoresistance. In the present study, we compared cisplatin sensitivity between OS stem cells and OS non-stem cells. We confirmed that OS stem cells showed significant cisplatin-resistance compared with the OS non-CSCs. Mechanically, we proved that overexpression of the pyruvate kinase isoenzyme M2 (PKM2) was responsible for the resistance to cisplatin in OS stem cells. As a potential strategy, we found that co-treatment with metformin significantly decreased the half maximal inhibitory concentration (IC50) of cisplatin to HOS OS stem cells by downregulating the expression of PKM2. PKM2 downregulation resulted in, metformin inhibited glucose uptake, lactate production and ATP production in HOS CSCs. Therefore, metformin impaired the resistance of HOS CSCs to cisplatin and promoted cisplatin-induced apoptosis. In addition, antitumor effects of other chemotherapeutic drugs such as doxorubicin and 5-fluorouracil were proved to be enhanced by metformin on OS stem cells.
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Affiliation(s)
- Depeng Shang
- Department of Orthopedics, Zhongshan Hospital Affiliated of Dalian University, Dalian, Liaoning 116001, P.R. China
| | - Ju Wu
- Department of General Surgery, Zhongshan Hospital Affiliated of Dalian University, Dalian, Liaoning 116001, P.R. China
| | - Lianyi Guo
- Department of Gastroenterology, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, Liaoning 121001, P.R. China
| | - Yanju Xu
- Department of Orthopedics, Zhongshan Hospital Affiliated of Dalian University, Dalian, Liaoning 116001, P.R. China
| | - Lezi Liu
- Department of Orthopedics, Zhongshan Hospital Affiliated of Dalian University, Dalian, Liaoning 116001, P.R. China
| | - Jianmin Lu
- Department of Orthopedics, Zhongshan Hospital Affiliated of Dalian University, Dalian, Liaoning 116001, P.R. China
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Liu J, Yan Q, Luo F, Shang D, Wu D, Zhang H, Shang X, Kang X, Abdo M, Liu B, Ma Y, Xin Y. Acute cholecystitis associated with infection of Enterobacteriaceae from gut microbiota. Clin Microbiol Infect 2015; 21:851.e1-9. [PMID: 26025761 DOI: 10.1016/j.cmi.2015.05.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Revised: 03/03/2015] [Accepted: 05/12/2015] [Indexed: 02/08/2023]
Abstract
Acute cholecystitis (AC) is one of the most common surgical diseases. Bacterial infection accounts for 50% to 85% of the disease's onset. Since there is a close relationship between the biliary system and the gut, the aims of this study were to characterize and determine the influence of gut microbiota on AC, to detect the pathogenic microorganism in the biliary system, and to explore the relationship between the gut and bile microbiota of patients with AC. A total of 185 713 high-quality sequence reads were generated from the faecal samples of 15 patients and 13 healthy controls by 16S rRNA gene pyrosequencing. Patients' samples were significantly enriched in Akkermansia, Enterobacter and Escherichia/Shigella group. The healthy controls, however, showed significant enrichment of Clostridiales, Coprococcus, Coprobacillaceae, Paraprevotella, Turicibacter and TM7-3 in their faecal samples. Escherichia coli was the main biliary pathogenic microorganism, among others such as Klebsiella spp., Clostridium perfringens, Citrobacter freundii and Enterobacter cloacae in the bile of the patients. Additionally, the amount of bile endotoxin significantly correlated with the number of Enterobacteriaceae, especially E. coli. Our data indicate that Enterobacteriaceae might play essential role in the pathogenesis and/or progress of AC. This was verified in an in vivo model using a pathogenic E. coli isolated from one of the patients in guinea pigs and observed marked gallbladder inflammation and morphologic changes. This study thus provides insight which could be useful for the prevention, diagnosis and treatment of AC and related diseases by controlling the growth of Enterobacteriaceae to alleviate the infection.
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Affiliation(s)
- J Liu
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - Q Yan
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China; Shenzhen Puensum Genetech Institution, Shenzhen, China
| | - F Luo
- Department of Acute Abdominal Surgery, Second Affiliated Hospital of Dalian Medical University, China
| | - D Shang
- Department of Acute Abdominal Surgery, First Affiliated Hospital of Dalian Medical University, China
| | - D Wu
- Department of Biotechnology, Dalian Medical University, Dalian, China
| | - H Zhang
- Department of Acute Abdominal Surgery, Second Affiliated Hospital of Dalian Medical University, China
| | - X Shang
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - X Kang
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - M Abdo
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - B Liu
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China
| | - Y Ma
- Department of Biochemistry and Molecular Biology, Dalian Medical University, China.
| | - Y Xin
- Department of Biotechnology, Dalian Medical University, Dalian, China.
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Affhan S, Dachang W, Xin Y, Shang D. Lactic acid bacteria protect human intestinal epithelial cells from Staphylococcus aureus and Pseudomonas aeruginosa infections. Genet Mol Res 2015; 14:17044-58. [DOI: 10.4238/2015.december.16.5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Wang J, Li J, Wang W, Zhang Y, Ding Y, Liu T, Shang D. Detecting the Variations of the Spatial Position and Overlap Ratio for Primary Thoracic Esophageal Cancer Target During Radiation Therapy Based on Repeated 4-Dimensional CT Scans. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.08.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Guo Y, Li J, Wang W, Zhang Y, Wang J, Duan Y, Shang D, Fu Z. Geometrical differences in target volumes based on 18F-fluorodeoxyglucose positron emission tomography/computed tomography and four-dimensional computed tomography maximum intensity projection images of primary thoracic esophageal cancer. Dis Esophagus 2014; 27:744-50. [PMID: 24915760 DOI: 10.1111/dote.12247] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The objective of the study was to compare geometrical differences of target volumes based on four-dimensional computed tomography (4DCT) maximum intensity projection (MIP) and 18F-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG PET/CT) images of primary thoracic esophageal cancer for radiation treatment. Twenty-one patients with thoracic esophageal cancer sequentially underwent contrast-enhanced three-dimensional computed tomography (3DCT), 4DCT, and 18F-FDG PET/CT thoracic simulation scans during normal free breathing. The internal gross target volume defined as IGTVMIP was obtained by contouring on MIP images. The gross target volumes based on PET/CT images (GTVPET ) were determined with nine different standardized uptake value (SUV) thresholds and manual contouring: SUV≥2.0, 2.5, 3.0, 3.5 (SUVn); ≥20%, 25%, 30%, 35%, 40% of the maximum (percentages of SUVmax, SUVn%). The differences in volume ratio (VR), conformity index (CI), and degree of inclusion (DI) between IGTVMIP and GTVPET were investigated. The mean centroid distance between GTVPET and IGTVMIP ranged from 4.98 mm to 6.53 mm. The VR ranged from 0.37 to 1.34, being significantly (P<0.05) closest to 1 at SUV2.5 (0.94), SUV20% (1.07), or manual contouring (1.10). The mean CI ranged from 0.34 to 0.58, being significantly closest to 1 (P<0.05) at SUV2.0 (0.55), SUV2.5 (0.56), SUV20% (0.56), SUV25% (0.53), or manual contouring (0.58). The mean DI of GTVPET in IGTVMIP ranged from 0.61 to 0.91, and the mean DI of IGTVMIP in GTVPET ranged from 0.34 to 0.86. The SUV threshold setting of SUV2.5, SUV20% or manual contouring yields the best tumor VR and CI with internal-gross target volume contoured on MIP of 4DCT dataset, but 3DPET/CT and 4DCT MIP could not replace each other for motion encompassing target volume delineation for radiation treatment.
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Affiliation(s)
- Y Guo
- Department of Radiation Oncology, Shandong Cancer Hospital and Institute, Jinan, Shandong, China
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Li M, Shang D, Chen C, Kong L, Yu J. Pretreatment CT Perfusion Predicts Early Response of Advanced Esophageal Carcinoma Treated With Chemoradiation Therapy. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Wang W, Li J, Zhang Y, Li F, Xu M, Fan T, Shao Q, Shang D. Comparison of patient-specific internal gross tumor volume for radiation treatment of primary esophageal cancer based separately on three-dimensional and four-dimensional computed tomography images. Dis Esophagus 2013; 27:348-54. [PMID: 23796234 DOI: 10.1111/dote.12089] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
To compare the target volume, position and matching index of the patient-specific internal gross tumor volume (IGTV) based on three-dimensional (3D) and four-dimensional (4D) computed tomography (CT) images for primary esophageal cancer. Twenty-nine patients with primary thoracic esophageal cancer underwent 3DCT and 4DCT scans during free breathing. IGTVs were constructed using three approaches: combining the gross target volumes from the 10 respiratory phases of the 4DCT dataset to produce IGTV10 ; IGTV2 was acquired by combining the two extreme phases; and IGTV3D was created from the 3DCT-based gross target volume by enlarging the 95th percentile of motion in each direction measured by the 4DCT. 0.16 cm lateral (LR), 0.14 cm anteroposterior (AP) and 0.29 cm superoinferior (SI) in the upper; 0.18 cm LR, 0.10 cm AP and 0.63 cm SI in the middle; and 0.40 cm LR, 0.58 cm AP and 0.82 cm in the lower thoracic esophagus could account for 95% of respiratory-induced tumor motion. The centroid position shift between IGTV10 and IGTV2 was all below 0.10 cm, and less than 0.20 cm between IGTV10 and IGTV3D . IGTV10 was bigger than IGTV2 ; the mean value of matching index for IGTV2 to IGTV10 was 0.87 ± 0.05, 0.85 ± 0.06 and 0.83 ± 0.05 for upper, middle and distal thoracic esophageal tumors, respectively, and just 0.57 ± 0.11, 0.56 ± 0.13 and 0.40 ± 0.03 between IGTV3D and IGTV10 . 4DCT-based IGTV10 is a reasonable patient-specific IGTV for primary thoracic esophageal cancer, and IGTV2 is considered as an acceptable alternative to IGTV10 . However, it seems unreasonable to use IGTV3D substitute IGTV10 .
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Affiliation(s)
- W Wang
- Department of Radiation Oncology, Shandong Tumor Hospital, Jinan, Shandong, China
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Bi X, Wang C, Ma L, Sun Y, Shang D. Investigation of the role of tryptophan residues in cationic antimicrobial peptides to determine the mechanism of antimicrobial action. J Appl Microbiol 2013; 115:663-72. [PMID: 23710779 DOI: 10.1111/jam.12262] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 05/04/2013] [Accepted: 05/18/2013] [Indexed: 11/27/2022]
Abstract
AIMS To understand the effects of Trp residues in linear antimicrobial peptides with α-helical conformations on cell permeation ability and membrane transduction efficacy. METHODS AND RESULTS A series of L-K6 analogues were designed and synthesized by replacing Ile or Leu with Trp at different positions on the hydrophobic face of L-K6. The antimicrobial and haemolytic activity and secondary structure of the designed Trp-containing peptides were assessed. In addition, the role of Trp in membrane disruption for these designed peptides was investigated. I1W, I4W and L5W demonstrated stronger activity than the other peptides against both Gram-positive and Gram-negative bacteria. All of the tested peptides preferentially interacted with negatively charged vesicles composed of phosphatidylglycerol (PG)/cardiolipin (CL) or PG/CL/phosphatidylethanolamine, and, to a lesser extent, with zwitterionic vesicles. I1W, I4W and L5W caused calcein release at 2·5 μmol l(-1) . CONCLUSIONS The position of Trp, rather than the number of Trp residues, in these peptides was an important factor in the antimicrobial activity. Trp residues were deeply inserted into negatively charged membranes but were largely exposed in aqueous buffer solution. SIGNIFICANCE AND IMPACT OF THE STUDY These Trp-containing peptides may represent good candidates for new antibiotic agents and for use in new therapeutic approaches.
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Affiliation(s)
- X Bi
- Faculty of Life Science, Liaoning Normal University, Dalian, China
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Headley JV, Peru KM, Mohamed MH, Frank RA, Martin JW, Hazewinkel RRO, Humphries D, Gurprasad NP, Hewitt LM, Muir DCG, Lindeman D, Strub R, Young RF, Grewer DM, Whittal RM, Fedorak PM, Birkholz DA, Hindle R, Reisdorph R, Wang X, Kasperski KL, Hamilton C, Woudneh M, Wang G, Loescher B, Farwell A, Dixon DG, Ross M, Pereira ADS, King E, Barrow MP, Fahlman B, Bailey J, McMartin DW, Borchers CH, Ryan CH, Toor NS, Gillis HM, Zuin L, Bickerton G, Mcmaster M, Sverko E, Shang D, Wilson LD, Wrona FJ. Chemical fingerprinting of naphthenic acids and oil sands process waters-A review of analytical methods for environmental samples. J Environ Sci Health A Tox Hazard Subst Environ Eng 2013; 48:1145-1163. [PMID: 23647107 DOI: 10.1080/10934529.2013.776332] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
This article provides a review of the routine methods currently utilized for total naphthenic acid analyses. There is a growing need to develop chemical methods that can selectively distinguish compounds found within industrially derived oil sands process affected waters (OSPW) from those derived from the natural weathering of oil sands deposits. Attention is thus given to the characterization of other OSPW components such as oil sands polar organic compounds, PAHs, and heavy metals along with characterization of chemical additives such as polyacrylamide polymers and trace levels of boron species. Environmental samples discussed cover the following matrices: OSPW containments, on-lease interceptor well systems, on- and off-lease groundwater, and river and lake surface waters. There are diverse ranges of methods available for analyses of total naphthenic acids. However, there is a need for inter-laboratory studies to compare their accuracy and precision for routine analyses. Recent advances in high- and medium-resolution mass spectrometry, concomitant with comprehensive mass spectrometry techniques following multi-dimensional chromatography or ion-mobility separations, have allowed for the speciation of monocarboxylic naphthenic acids along with a wide range of other species including humics. The distributions of oil sands polar organic compounds, particularly the sulphur containing species (i.e., OxS and OxS2) may allow for distinguishing sources of OSPW. The ratios of oxygen- (i.e., Ox) and nitrogen-containing species (i.e., NOx, and N2Ox) are useful for differentiating organic components derived from OSPW from natural components found within receiving waters. Synchronous fluorescence spectroscopy also provides a powerful screening technique capable of quickly detecting the presence of aromatic organic acids contained within oil sands naphthenic acid mixtures. Synchronous fluorescence spectroscopy provides diagnostic profiles for OSPW and potentially impacted groundwater that can be compared against reference groundwater and surface water samples. Novel applications of X-ray absorption near edge spectroscopy (XANES) are emerging for speciation of sulphur-containing species (both organic and inorganic components) as well as industrially derived boron-containing species. There is strong potential for an environmental forensics application of XANES for chemical fingerprinting of weathered sulphur-containing species and industrial additives in OSPW.
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Affiliation(s)
- J V Headley
- Water Science & Technology Directorate, Environment Canada, Saskatoon, Saskatchewan, Canada.
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Shang D, Sun Y, Wang C, Ma L, Li J, Wang X. Rational design of anti-microbial peptides with enhanced activity and low cytotoxicity based on the structure of the arginine/histidine-rich peptide, chensinin-1. J Appl Microbiol 2012; 113:677-85. [PMID: 22686707 DOI: 10.1111/j.1365-2672.2012.05355.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2012] [Revised: 05/12/2012] [Accepted: 05/18/2012] [Indexed: 11/29/2022]
Abstract
AIMS To understand the structure-activity relationship of chensinin-1, a anti-microbial peptide (AMP) with an unusual structure, and to develop novel AMPs as therapeutic agents. METHODS AND RESULTS A series of chensinin-1 analogues were designed and synthesized by one to three replacement of glycines with leucines at the hydrophilic face of chensinin-1 or rearrangement of some of the residues in its sequence. Circular dichroism spectroscopy showed that the analogues adopted α-helical-type conformations in 50% trifluoroethanol/water but adopted β-strand-type conformations in 30 mmol l(-1) sodium dodecyl sulphate. The anti-microbial activities of the peptides against Gram-positive bacteria increased 5- to 30-fold, and these increases paralleled the increases in the peptides' hydrophobicities. Their haemolytic activities also increased. Amphipathicities had little influence on the bactericidal activity of chensinin-1. All peptides caused leakage of calcein entrapped in negatively charged liposomes although with different efficiencies. The peptides did not induce leakage of calcein from uncharged liposomes. CONCLUSIONS Peptide adopted an aperiodic structure can improve the anti-microbial potency by increasing peptide hydrophobicity. Its target is bacteria plasma membrane. SIGNIFICANCE AND IMPACT OF THE STUDY Chensinin-1 can act as a new lead molecule for the study of AMPs with atypical structures.
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Affiliation(s)
- D Shang
- Faculty of Life Science, Liaoning Normal University, Dalian, China.
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Li M, Shang D, Li J, Du J, Yin Y, Yu J. The Use of 4D-CT for Determining the Internal Target Volume of Solitary Pulmonary Lesion. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Shang D, Li M, Li J, Yin Y, Du J, Yu J. Comparison of 4D-CT MIP Method with Axial CT Empirical Margin for the PTV of Solitary Pulmonary Lesion. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhao J, Hua R, Zhao X, Meng Y, Ao Y, Liu Q, Shang D, Sun M, Lo WY, Zhang X. Three novel mutations of the EDA gene in Chinese patients with X-linked hypohidrotic ectodermal dysplasia. Br J Dermatol 2008. [DOI: 10.1111/j.0007-0963.2007.08320.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhao J, Hua R, Zhao X, Meng Y, Ao Y, Liu Q, Shang D, Sun M, Lo WHY, Zhang X. Three novel mutations of the EDA gene in Chinese patients with X-linked hypohidrotic ectodermal dysplasia. Br J Dermatol 2007; 158:614-7. [PMID: 18076698 DOI: 10.1111/j.1365-2133.2007.08383.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J Zhao
- Department of Medical Genetics and National Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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Akwar TH, Poppe C, Wilson J, Reid-Smith RJ, Dyck M, Waddington J, Shang D, Dassie N, McEwen SA. Risk factors for antimicrobial resistance among fecal Escherichia coli from residents on forty-three swine farms. Microb Drug Resist 2007; 13:69-76. [PMID: 17536936 DOI: 10.1089/mdr.2006.9999] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Fecal Escherichia coli (n = 555) were isolated from 115 residents on 43 farrow-to-finish swine farms to determine the prevalence of antimicrobial resistance and associated risk factors. Susceptibility to 21 antimicrobials was determined and the overall prevalence of antimicrobial resistance was 25.8%. Pair-wise difference in prevalences of resistance to individual antimicrobials was significant between isolates from residents on farms that fed medicated swine rations compared to those that did not (p = 0.013). Cross-resistance among antimicrobials of same class and multidrug-resistance were observed. Logistic regression models revealed the following risk factors positively associated with antimicrobial resistance: use of antimicrobials in pigs on farms; number of hours per week that farmers spent in their pig barns; handling of sick pigs; and intake of antimicrobials by farm residents. This study indicates that occupational exposure of farmers to resistant bacteria and use of antimicrobials in pig farming may constitute a source of resistance in humans, although the human health impacts of such resistance is unknown. The consumption of antimicrobials by farmers appeared to constitute a significant risk for resistance development. Fecal E. coli from farm residents may act as a reservoir of resistance genes for animal and/or human pathogens.
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Affiliation(s)
- T H Akwar
- Department of Population Medicine, University of Guelph, Guelph, Ontario, Canada.
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Shang D, Carnahan H, Dubrowski A. Structural flexibility of laparoscopic instruments: implication for the design of virtual reality simulators. Stud Health Technol Inform 2006; 119:503-5. [PMID: 16404108] [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: 05/06/2023]
Abstract
Laparoscopic training, under simulated settings, benefits from high fidelity models of the actual environment. This study was aimed at reducing uncertainty in the displacement and loads experienced by a laparoscopic instrument during surgical training. Infrared tracking of laparoscopic instruments is ineffective when real tissues attenuate the infrared signals. Incorporating the use of strain gauges for tip deflection measurements allows for online motion and load tracking during a procedure. Strain gauge voltages and infrared markers indicating displacement were both linear with respect to loads up to 700 grams. The resultant strain gauge voltage was equated to deflection values with a calibration constant. The results serve two purposes. First, it may enable the tracking and analysis of the skill level of novice surgeons using bench models. Second, the mechanical model of each instrument can be quantified and incorporated into virtual simulations, thus increasing model fidelity, effectively leading to better learning.
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Affiliation(s)
- D Shang
- Department of Kinesiology, University of Waterloo, Canada
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Zhang M, Zhu J, Wang Q, Shang D. Contrast enhanced MR angiography in pulmonary sequestration. Chin Med J (Engl) 2001; 114:1326-8. [PMID: 11793865] [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: 02/23/2023] Open
Abstract
OBJECTIVE To evaluate the feasibility of contrast enhanced three-dimensional (3D) magnetic resonance angiography (MRA) in identifying the systemic blood supply in pulmonary sequestration. METHODS Three patients who were suspected of pulmonary sequestration were examined by contrast enhanced 3D MRA. MR images were compared with surgical findings. RESULTS Contrast enhanced 3D MRA clearly demonstrated systemic arteries from the descending thoracic aorta supplying the basilar segments of the lower lobe in each case. Pulmonary veins from these segments, which drained into the left atrium in two cases, were also detected. MRA images were consistent with those observed in surgery. CONCLUSION Contrast enhanced 3D MRA allows accurate diagnosis of pulmonary sequestration and may obviate the need for more invasive investigations.
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Affiliation(s)
- M Zhang
- Department of Radiology, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.
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Wattam B, Shang D, Rahman S, Egglezou S, Scully M, Kakkar V, Lu X. Arg-Tyr-Asp (RYD) and Arg-Cys-Asp (RCD) motifs in dendroaspin promote selective inhibition of beta1 and beta3 integrins. Biochem J 2001; 356:11-7. [PMID: 11336631 PMCID: PMC1221807 DOI: 10.1042/0264-6021:3560011] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Arg-Gly-Asp (RGD) is a unique minimal integrin-binding sequence that is found within several glycoprotein ligands. This sequence has also been found in snake-venom anti-platelet proteins, including the disintegrins and dendroaspin, a natural variant of short-chain neurotoxins isolated from the venom of Dendroaspis jamesonii. In the present study, the motifs RYD and RCD were introduced into the dendroaspin scaffold to replace RGD. Both motifs in dendroaspin caused inhibition of ADP-induced platelet aggregation with IC(50) values of 200 and 300 nM respectively, similar to that of the wild-type RGD motif (170 nM). In comparison with wild-type dendroaspin, both RYD- and RCD-containing dendroaspins were more selective in the inhibition of the adhesion of K562 cells to laminin rather than to fibrinogen and fibronectin, even though they were 10-30-fold less potent at inhibiting K562 cell (containing alpha(5)beta(1) integrin) adhesion to laminin compared with wild-type. Interestingly, the RYD motif produced a similar IC(50) value to the RGD motif at inhibiting A375-SM cell (beta(3) integrin) adhesion to collagen, whereas the RCD motif was approx. 2-6-fold less potent compared with either RGD or RYD. These findings show that the selectivity of dendroaspin binding to beta(1) and beta(3) integrins can be modulated by the introduction of alternative cell recognition sequences.
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Affiliation(s)
- B Wattam
- Thrombosis Research Institute, Manresa Road, London SW3 6LR, UK
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Lu X, Sun Y, Shang D, Wattam B, Egglezou S, Hughes T, Hyde E, Scully M, Kakkar V. Evaluation of the role of proline residues flanking the RGD motif of dendroaspin, an inhibitior of platelet aggregation and cell adhesion. Biochem J 2001; 355:633-8. [PMID: 11311124 PMCID: PMC1221777 DOI: 10.1042/bj3550633] [Citation(s) in RCA: 13] [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: 11/17/2022]
Abstract
The effect of a panel of proline mutants of dendroaspin, an inhibitor of platelet aggregation and cell adhesion, including A(42)-dendroaspin, A(47)-dendroaspin, A(49)-dendroaspin, A(42,47)-dendroaspin and A(47,49)-dendroaspin, was investigated using platelet-aggregation and cell-adhesion assays. Here we show that a single alanine-for-proline substitution did not affect potency when measured as the ability either to inhibit platelet aggregation induced by ADP (IC(50) approximately 170 nM) or to block transfected A375-SM cell adhesion to fibrinogen in the presence of Mn(2+) as compared with wild-type dendroaspin. By comparison, double proline substitution with alanines significantly reduced the potency in both assays by approx. 5-8-fold. These observations, therefore, suggest that proline residues flanking the RGD motif in dendroaspin and other RGD-containing venom proteins, e.g. disintegrins, may contribute to maintaining a favourable conformation for the solvent-exposed RGD site for its recognition by integrin receptors.
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Affiliation(s)
- X Lu
- Thrombosis Research Institute, Manresa Road, London, SW3 6LR, UK.
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Abstract
TT virus (TTV) is transfusion-transmissible but its involvement in post-transfusion hepatitis is uncertain. To investigate the potential association of TTV with liver diseases, the prevalence of TTV DNA was tested by semi-nested PCR in 113 carriers of hepatitis C virus (HCV), 10 patients with acute liver failure, 11 patients with cryptogenic cirrhosis and 200 control blood donors. Thirty-seven of these patients underwent liver transplantation and were tested pre- and post-transplantation. TTV DNA was semi-quantified in serial samples from seven patients with unexplained post-transplant hepatitis. TTV genotyping was performed on samples from 28 patients by sequence analysis. The prevalence of TTV DNA in blood donors was 1.5% and 17% in HCV infected haemophiliacs. In patients with acute or chronic liver disease or hepatitis, 6 to 27% prevalence was observed. After liver transplantation, the prevalence of TTV DNA increased from 16 to 46% (P < 0.01). In patients who developed unexplained hepatitis post-transplantation, TTV viraemia did not parallel ALT levels. TTV DNA either increased in titre or became detectable shortly after transplantation, suggesting that either TTV was transfusion-transmitted, or, more likely, that immunosuppression caused a recurrence of low level or undetectable TTV viraemia. TTV had considerable genomic diversity in the N22 region, corresponding to at least 4 genotypes. Genotype 2 was found in 14/28 patients.
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Affiliation(s)
- D Shang
- Department of Haematology, Division of Transfusion Medicine, East Anglia Blood Centre, Cambridge, United Kingdom
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Abstract
TT virus (TTV) is transfusion-transmissible but its involvement in post-transfusion hepatitis is uncertain. To investigate the potential association of TTV with liver diseases, the prevalence of TTV DNA was tested by semi-nested PCR in 113 carriers of hepatitis C virus (HCV), 10 patients with acute liver failure, 11 patients with cryptogenic cirrhosis and 200 control blood donors. Thirty-seven of these patients underwent liver transplantation and were tested pre- and post-transplantation. TTV DNA was semi-quantified in serial samples from seven patients with unexplained post-transplant hepatitis. TTV genotyping was performed on samples from 28 patients by sequence analysis. The prevalence of TTV DNA in blood donors was 1.5% and 17% in HCV infected haemophiliacs. In patients with acute or chronic liver disease or hepatitis, 6 to 27% prevalence was observed. After liver transplantation, the prevalence of TTV DNA increased from 16 to 46% (P < 0.01). In patients who developed unexplained hepatitis post-transplantation, TTV viraemia did not parallel ALT levels. TTV DNA either increased in titre or became detectable shortly after transplantation, suggesting that either TTV was transfusion-transmitted, or, more likely, that immunosuppression caused a recurrence of low level or undetectable TTV viraemia. TTV had considerable genomic diversity in the N22 region, corresponding to at least 4 genotypes. Genotype 2 was found in 14/28 patients.
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Affiliation(s)
- D Shang
- Department of Haematology, Division of Transfusion Medicine, East Anglia Blood Centre, Cambridge, United Kingdom
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Shang D. [Progress in the study of prevention and control of Brucellosis in China in last 50 years]. Zhonghua Liu Xing Bing Xue Za Zhi 2000; 21:55-7. [PMID: 15460005] [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: 04/30/2023]
Affiliation(s)
- D Shang
- Institute of Epidemiology and Microbiology, China Academy of Preventive Medicine, Beijing 102206, China
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Abstract
To investigate the potential clinical utility of antibody response to HVR1 of HCV, the genomic and amino acid diversity of HVR1 was compared between two groups of four chronic HCV carriers with or without liver cirrhosis. Peptides corresponding to the deduced COOH- and NH2-terminal amino acid sequences of HVR1 were synthesised to assess the reactivity of patient sera to autologous and homologous HVR1 epitopes by enzyme-linked immunosorbent assay. HCV chronic carriers had significantly more frequent cross-reactivity with homologous C- than N-terminal HVR1 peptides. Twelve cirrhotic and eleven noncirrhotic patients had a similar frequency of cross-reactivity with either C- or N-terminal HVR1 peptides. However, noncirrhotic patients had a significantly higher level of C-terminal HVR1 antibody cross-reactivity than cirrhotic patients. In HCV chronic carriers, the magnitude of the immune response to but not the frequency of cross-reactivity with C-terminus HVR1 peptides differ between patients with and without liver cirrhosis.
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Affiliation(s)
- J P Allain
- Department of Haematology, University of Cambridge, United Kingdom.
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Abstract
The HCV hypervariable region 1 (HVR1) of the main E2 envelope protein is critically important in HCV neutralization but its extreme variability makes immune therapy and vaccine development particularly difficult. To explore the hypothesis that HVR1 carries a common epitope susceptible of eliciting cross-reactive neutralizing and inhibitory antibodies, rabbits were immunized with a series of synthetic HVR1 peptides. The anti-HVR1 produced were purified and characterized. Several lines of evidence supported the working hypothesis: (1) although injected only once, a boosting effect from poorly homologous peptides was observed; (2) purified rabbit IgG reacted with high affinity with immunizing peptides and cross-reacted with 16 of 17 unrelated HVR1 peptides; (3) antibodies appeared of restricted diversity irrespective of the linear HVR1 peptide sequences; (4) anti-HVR1 peptides effectively captured HCV in 22 of 33 plasmas from random infected patients; (5) anti-HVR1 IgG blocked the binding of antibody-captured HCV to MOLT-4 cells. These findings suggest that with an appropriate HVR1 peptide immunization scheme, high titer, broadly cross-reactive, blocking antibodies to HCV can be produced. Antibodies to the putative ubiquitous HVR1 epitope may have important clinical uses.
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Affiliation(s)
- D Shang
- Department of Haematology, University of Cambridge, Cambridge, United Kingdom
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Shang D. [Brucellosis and its prevention and control]. Zhonghua Liu Xing Bing Xue Za Zhi 1998; 19:67-8. [PMID: 10322710] [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: 02/12/2023]
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37
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Shang D. [Current status of epidemiological study of brucellosis]. Zhonghua Liu Xing Bing Xue Za Zhi 1998; 19:107-10. [PMID: 10322722] [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: 02/12/2023]
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Chen P, Shang D. [Current status of the study on the integration of traditional Chinese medicine with Western medicine in the treatment of arteriosclerosis obliterans]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1998; 18:122-4. [PMID: 11367643] [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: 04/16/2023]
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Xu D, Lu H, Nu J, Meng Z, Shang D, Kang T. [Dynamic study of anti-NS5 and ALT in post-transfusion hepatitis C]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 1997; 11:344-7. [PMID: 15617244] [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: 05/01/2023]
Abstract
In order to study the character and dynamic changes of HCV NS5 antigen in post-transfusion hepatitis C, EIA was established with fusion protein, and different groups of population were investigated. The results showed the positive rate of whole blood donor, normal people, chronic hepatitis C patients and post transfusion hepatitis C patients is 0.0%, 1.66%, 50.7% and 70.5%, respectively. Serial blood samples of 25 cases of acute or chronic post-transfusion hepatitis C were detected, and the results indicated that the antibody of NS5 appeared relatively late, and the serum conversion time was 182.9 +/- 168.5 days. The anti-NS5 positive rate in 1, 3, 6, 12 and 24 months after HCV infection was 28%, 40%, 52%, 68% and 76%, respectively. The positive rate of anti-NS5 in sera with HCV RNA was 61.9%. Analysis on the appearance of antibody to the different antibody region of the gene, ALT and HCV RNA showed the dynamic changes of anti-NS5 were corresponding to the serum ALT in some cases, indicating antibody of NS5 appear later and may reflect the disease activity to some extent. The dynamic changes of anti-NS5 are of four kinds: transient positive, intermittent positive, persistent positive and persistent negative in during the two years period.
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Affiliation(s)
- D Xu
- Institute of Basic Medical Sciences, Academy of Military Medical Sciences, Beijing
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Shen D, Lu H, Li M, He L, Shang D, Ma X. [Cloning and sequencing of cDNA of E2/NS1 gene of hepatitis C virus]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 1997; 11:227-31. [PMID: 15617335] [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: 05/01/2023]
Abstract
Hepatitis C virus (HCV) RNA extracted from serum of a patient infected with HCV in Beijing was converted to cDNA by reverse transcription. HCV E2/NS1 gene (approximately 930 bp) was amplified by nested polymerase chain reaction and was inserted into pGEM-T plasmid vector. The 431 bp nucleotide sequence at 5' terminus of this gene was determined by dideoxy-mediated chain termination method. The result of comparison of this sequence and sequences of another 9 HCV isolates suggested that the isolate we obtained was highly homologous to HCV genotype II. There are two hypervariable regions (HVR) at the N terminus of envelope protein encoded by HCV E2/NS1 gene. Several relatively conserved amino acid residues and areas located in and out of HVR were also observed. They are concerned in maintenance of spatial conformation of HCV envelope protein, but their immune function remains to be further studied.
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Affiliation(s)
- D Shen
- Department of Microbiology, PLA General Hospital, Beijing 100853
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Abstract
BACKGROUND The apolipoprotein E epsilon 4 (APOE-epsilon 4) allele is a risk factor for Alzheimer's disease (AD), but it is neither essential nor sufficient for development of the disease. Other factors-genetic or environmental-must therefore have a role. By means of a PCR we have detected herpes simplex virus type 1 (HSV1) in latent form in brains of elderly people with and without AD. We have postulated that limited reactivation of the virus causes more damage in AD patients than in elderly people without AD because of a difference in the hosts. We now report the APOE genotypes of AD patients and non-AD sufferers with and without HSV1 in brain. METHODS DNA was extracted from 84 samples of brain from 46 AD patients (39 temporal lobe, 39 frontal lobe, three hippocampus) and from 75 samples of brain from 44 non-AD elderly people (33 temporal lobe, 36 frontal lobe, six hippocampus). PCR amplification was used to detect HSV1 thymidine kinase gene and the host APOE gene. FINDINGS By multiple logistic regression, the APOE-epsilon 4 allele frequency was significantly higher in the patients positive for HSV1 in brain than in the HSV1-negative AD group, the HSV1-positive non-AD group, or the HSV1-negative non-AD group (52.8% vs 10.0%, 3.6%, and 6.3%, respectively). The odds ratio for APOE-epsilon 4 in the HSV1-positive AD group compared with HSV1-negative non-AD group was 16.8 (95% CI 3.61-77.8) and in the HSV1-negative AD group, 1.67 (0.21-13.4). We also compared APOE genotypes of 40 people who had recurrent cold sores and 33 non-sufferers; the APOE-epsilon 4 allele frequencies were 36% and 9%, respectively (p < 0.0001). INTERPRETATION These findings suggest that the combination of HSV1 in brain and carriage of an APOE-epsilon 4 allele is a strong risk factor for AD, whereas either of these features alone does not increase the risk of AD. The findings in people with cold sores support our hypothesis that APOE-epsilon 4 and HSV1 together are damaging in the nervous system.
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Affiliation(s)
- R F Itzhaki
- Molecular Neurobiology Laboratory, Department of Optometry and Vision Sciences, UMIST, Manchester
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Lin WR, Shang D, Itzhaki RF. Neurotropic viruses and Alzheimer disease. Interaction of herpes simplex type 1 virus and apolipoprotein E in the etiology of the disease. Mol Chem Neuropathol 1996; 28:135-41. [PMID: 8871952 DOI: 10.1007/bf02815215] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Infectious agents have been proposed as possible etiological factors in sporadic cases of Alzheimer disease (AD), herpes simplex type 1 virus (HSV1) being a likely candidate. We have detected laten HSV1 in brain from AD patients and from aged normal individuals, using polymerase chain reaction (PCR), in the regions most affected in the disease. In contrast, we have not detected another neurotropic herpes virus, varicella zoster (VZV), in any brains. We have postulated that HSV1 reactivates periodically, and that a host or viral characteristic determines the degree of damage caused by the resulting acute infection-with much greater damage in the case of AD patients. We have therefore examined a host factor-the apolipoprotein E (apoE) genotype, since the E4 allele is a known risk factor in the disease. We have found that the risk of developing AD is much greater in those who are HSV1-positive in brain and who possess an apoE4 allele than for those with only one of these factors.
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Affiliation(s)
- W R Lin
- Department of Optometry and Vision Sciences, UMIST., Manchester, UK
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Affiliation(s)
- W R Lin
- Department of Optometry & Vision Sciences, UMIST, Manchester, U.K
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44
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Shen Q, Shang D, Ma F, Zhang Z. [Pharmacological study on anti-hepatitis effect of Cotinus coggygria Scop. Syrup]. Zhongguo Zhong Yao Za Zhi 1991; 16:746-9, 763-4. [PMID: 1811673] [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: 12/28/2022]
Abstract
This paper shows that the Cotinus coggygria syrup has the effect of protecting the liver from chemical damages, reducing tension of the choledochal sphincter, increasing the bile flow and raising the body immunity. The anti-hepatitis effect may be carried out through decreasing transaminase, normalizing functioning of the gallbladder, reducing icterus and enhancing the immunity of the body.
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Affiliation(s)
- Q Shen
- PLA 371th Hospital, Xinxiang
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