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Zhu Y, Chen T, Sun S, Ji Y, Zhao D, Zhuang D, Lian Y, Rong Y, Yan J, Sun H. Influence of Air Volume and Temperature in the Air Inlet Tunnel on the Characteristics of Dust Movement. ACS Omega 2024; 9:866-878. [PMID: 38222645 PMCID: PMC10785299 DOI: 10.1021/acsomega.3c06816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/12/2023] [Accepted: 11/14/2023] [Indexed: 01/16/2024]
Abstract
In order to clarify the movement characteristics of dust particles in the intake tunnel and improve the underground intake tunnel environment, the main intake tunnel of Wulihou Coal Mine was taken as the engineering background, the COMSOL simulation software was adopted to establish a model, the influence of air volume and temperature on dust movement characteristics was studied, and the critical air volume and particle size of dust at room temperature were determined. The results show that with the ventilation air volume being the same, when the dust reaches the exit of the tunnel, its falling height is positively correlated with the particle size. When the dust particle size is the same, the height of the dust falling is negatively correlated with the ventilation air volume. As the particle size of dust increases, the impact of changes in air volume on its movement decreases and the trajectory of dust movement gradually becomes consistent. The height of dust falling is negatively correlated with the air flow temperature. Therefore, when other factors remain unchanged, dust pollution in the tunnel is relatively severe during the day and the dust concentration in the tunnel is higher in summer. The critical air volume for dust emission in the intake tunnel of Wulihou Coal Mine is 75.84 m3/s, corresponding to a central wind speed of 5.29 m/s in the tunnel. The critical particle size for dust emission is 1.4 μm.
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Affiliation(s)
- YeMing Zhu
- Department
of Nuclear Emergency and Nuclear Safety, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - Tao Chen
- College
of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - ShuTang Sun
- Department
of Nuclear Emergency and Nuclear Safety, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - Ying Ji
- Taiyuan
Power Supply Company, State Grid Shanxi
Electric Power Company, Taiyuan 030001, Shanxi, China
| | - Dong Zhao
- College
of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
| | - DaJie Zhuang
- Department
of Nuclear Emergency and Nuclear Safety, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - YiRen Lian
- Department
of Nuclear Emergency and Nuclear Safety, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - Yu Rong
- Department
of Nuclear Emergency and Nuclear Safety, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - Jin Yan
- Department
of Nuclear Emergency and Nuclear Safety, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
| | - HongChao Sun
- Department
of Nuclear Emergency and Nuclear Safety, China Institute for Radiation Protection, Taiyuan 030006, Shanxi, China
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Yang XR, Sun HC, Xie Q, Zhang WG, Jia WD, Zhao M, Zhao HT, Liu XF, Zhou LD, Yan S, Xu L, Wang NY, Ding Y, Zhu XD, Zhou J, Fan J. [Chinese expert guidance on overall application of lenvatinib in hepatocellular carcinoma]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:1018-1029. [PMID: 38016765 DOI: 10.3760/cma.j.cn115610-20230201-00035-1] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/30/2023]
Abstract
Lenvatinib mesylate is an oral receptor tyrosine kinase inhibitor against targets of vascular endothelial growth factor receptors 1-3, fibroblast growth factor receptors 1-4, platelet-derived growth factor receptor α, stem cell growth factor receptor, and rearranged during transfection, et al. Lenvatinib has been approved by the National Medical Products Administration of China on September 4, 2018, for the first-line treatment of patients with unresectable hepatocellular carcinoma who have not received systematic treatment before. Up to February 2023, Lenvatinib has been listed in China for more than 4 years, accumulating a series of post-marketing clinical research evidences. Based on the clinical practice before and after the launch of lenvatinib and referring to the clinical experience of other anti-angiogenesis inhibitors, domestic multidisciplinary experts and scholars adopt the Delphi method to formulate the Chinese Expert Guidance on Overall Application of Lenvatinib in Hepatocellular Carcinoma after repeated discussions and revisions, in order to provide reference for reasonable and effective clinical application of lenvatinib for clinicians.
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Affiliation(s)
- X R Yang
- Department of Liver Surgery, Research Institute of Liver Cancer, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - H C Sun
- Department of Liver Surgery, Research Institute of Liver Cancer, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Q Xie
- Department of Infectious Diseases, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| | - W G Zhang
- Hepatic Surgery Center,Tongji Hospital,Tonji Medical College, Huazhong University of Science and Technolog, Wuhan 430030, China
| | - W D Jia
- Department of Liver Surgery, the First Affiliated Hospital of University of Science and Technology of China, Hefei 230001, China
| | - M Zhao
- Department of Minimally Invasive and Interventional, Sun Yat-sen University Cancer Center, State Key Laboratory of Oncology in Southern China, Guangzhou 510060, China
| | - H T Zhao
- Department of Hepatic Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X F Liu
- Department of Oncology, Qinhuai Medical District, Eastern Theater General Hospital of PLA, Nanjing 210002, China
| | - L D Zhou
- Department of Liver Surgery, Xiangya Hospital of Central South University, Changsha 410008, China
| | - S Yan
- Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - L Xu
- Department of Liver Surgery, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - N Y Wang
- Department of Cancer Center, the First Hospital of Jilin University, Changchun 130021, China
| | - Y Ding
- Department of Hepatobiliary and Pancreatic Surgery, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - X D Zhu
- Department of Liver Surgery, Research Institute of Liver Cancer, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - J Zhou
- Department of Liver Surgery, Research Institute of Liver Cancer, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - J Fan
- Department of Liver Surgery, Research Institute of Liver Cancer, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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Ruan WY, Zhang YL, Zheng SG, Sun Y, Fan ZP, Song YL, Sun HC, Wang WM, Dai JW, Zhao ZJ, Zhang TT, Chen D, Pan YC, Jiang YG, Wang XD, Zheng LW, Zhu QL, He M, Xu BS, Jia ZL, Han D, Duan XH. [Expert consensus on the biobank development of oral genetic diseases and rare diseases and storage codes of related biological samples from craniofacial and oral region]. Zhonghua Kou Qiang Yi Xue Za Zhi 2023; 58:749-758. [PMID: 37550034 DOI: 10.3760/cma.j.cn112144-20230523-00210] [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] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
The biological samples of oral genetic diseases and rare diseases are extremely precious. Collecting and preserving these biological samples are helpful to elucidate the mechanisms and improve the level of diagnose and treatment of oral genetic diseases and rare diseases. The standardized construction of biobanks for oral genetic diseases and rare diseases is important for achieving these goals. At present, there is very little information on the construction of these biobanks, and the standards or suggestions for the classification and coding of biological samples from oral and maxillofacial sources, and this is not conducive to the standardization and information construction of biobanks for special oral diseases. This consensus summarizes the background, necessity, principles, and key points of constructing the biobank for oral genetic diseases and rare diseases. On the base of the group standard "Classification and Coding for Human Biomaterial" (GB/T 39768-2021) issued by the National Technical Committee for Standardization of Biological Samples, we suggest 76 new coding numbers for different of biological samples from oral and maxillofacial sources. We hope the consensus may promote the standardization, and smartization on the biobank construction as well as the overall research level of oral genetic diseases and rare diseases in China.
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Affiliation(s)
- W Y Ruan
- Clinic of Oral Rare Diseases and Genetic Diseases & Department of Oral Biology, School of Stomatology, The Fourth Military Medical University, State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
| | - Y L Zhang
- Clinic of Oral Rare Diseases and Genetic Diseases & Department of Oral Biology, School of Stomatology, The Fourth Military Medical University, State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
| | - S G Zheng
- Department of Preventive Dentistry, Peking University School and Hospital of Stomatology & National Center for 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
| | - Y Sun
- Department of Oral Implantology, Stomatological Hospital and Dental School of Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai 200072, China
| | - Z P Fan
- Capital Medical University School of Stomatology & Beijing Key Laboratory of Tooth Regeneration and Function Reconstruction, Beijing 100050, China
| | - Y L Song
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - H C Sun
- Department of Oral Pathology, Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - W M Wang
- Department of Oral Mucosal Diseases, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - J W Dai
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Z J Zhao
- The First Outpatient Department, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, China
| | - T T Zhang
- Department of Oral and Maxillofacial Surgery, Stomatological Hospital, Tianjin Medical University, Tianjin 300070, China
| | - D Chen
- Department of Polyclinics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Y C Pan
- Department of Orthodontics, The Affiliated Stomatological Hospital of Nanjing Medical University & Jiangsu Province Key Laboratory of Oral Diseases & Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Y G Jiang
- Department of Cariology & Endodontics, College of Stomatology, Xi'an Jiaotong University, Xi'an 710004, China
| | - X D Wang
- Department of Oral and Craniomaxillofacial Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - L W Zheng
- Deparment of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - Q L Zhu
- Department of Operative Dentistry and Endodontics, School of Stomatology, The Fourth Military Medical University, State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
| | - M He
- Deparment of Pediatric Dentistry, School & Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - B S Xu
- Department of Oral and Maxillofacial Surgery, Institute of Stomatological Research, Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University & Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, China
| | - Z L Jia
- Deparment of Cleft Lip and Palate Surgery, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - D Han
- Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center for 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
| | - X H Duan
- Clinic of Oral Rare Diseases and Genetic Diseases & Department of Oral Biology, School of Stomatology, The Fourth Military Medical University, State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
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Shi C, Li ZM, Sun HC. [Clinical and pathological features and differential diagnosis of fibro-osseous tumors and dysplasias]. Zhonghua Kou Qiang Yi Xue Za Zhi 2023; 58:124-130. [PMID: 36746445 DOI: 10.3760/cma.j.cn112144-20220905-00477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Fibro-osseous lesions is a class of diseases with obvious similarities in clinical manifestations and pathological features, which has been attracting the attention of clinicians and pathologists. The latest WHO 2022 Classification (5th edition) included six of these diseases (cemento-osseous dysplasia, segmental odontomaxillary dysplasia, fibrous dysplasia, juvenile trabecular ossifying fibroma, psammomatoid ossifying fibroma and familial gigantiform cementoma) in the " fibro-osseous tumours and dysplasias ", and put forward new ideas on the diagnosis and treatment of these diseases. According to the latest WHO 2022 Classification (5th edition), the clinical and pathological features, diagnosis and differential diagnosis of these six diseases were described.
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Affiliation(s)
- C Shi
- Department of Oral Pathology, Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Z M Li
- Department of Oral Radiology, School and Hospital of Stomatology, China Medical University, Liaoning Provincial Key Laboratory of Oral Diseases, Shenyang 110002, China
| | - H C Sun
- Department of Oral Pathology, Hospital of Stomatology, Jilin University, Changchun 130021, China
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5
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Ni SL, Li ZM, Sun HC. [Diagnosis and differentiation diagnosis of primary temporomandibular joint cartilage and giant cell related tumor lesions]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:1097-1101. [PMID: 36379887 DOI: 10.3760/cma.j.cn112144-20220905-00476] [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: 06/16/2023]
Abstract
Cartilage and giant cell-related neoplastic lesions originating in the temporomandibular joint region have similar clinical, imaging and pathological manifestations, making the diagnosis of these disorders challenging to varying degrees. Diagnostic findings can influence treatment procedures and a definitive pathological diagnosis is important for the prognosis of these conditions. In this article, we discuss the pathological diagnosis and differentiation of four benign cartilage and giant cell related tumors and tumor-like lesions that occur in the temporomandibular joint, namely synovial chondromatosis, tumoral calcium pyrophosphate deposition disease, pigmented villonodular synovitis and chondroblastoma, taking into account their clinical features and histological manifestations, with a view to providing a basis for clinical management.
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Affiliation(s)
- S L Ni
- The First Department of Oral and Maxillofacial Surgery & Oral Plastic and Aesthetic Surgery, Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Z M Li
- Department of Medical Imaging, Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - H C Sun
- Department of Oral Pathology, Hospital of Stomatology, Jilin University, Changchun 130021, China
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6
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Sun HC, Fu Y, Yuan XF, Li JX, Xu LH, Zhang JN, Yu B, Huang J, Qi M, Shi TY. Molecular Detection and Genotyping of Toxoplasma gondii from Pigs for Human Consumption in Zhejiang and Jiangsu Provinces, Eastern China. Foodborne Pathog Dis 2022; 19:686-692. [PMID: 36179062 DOI: 10.1089/fpd.2022.0036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Toxoplasma gondii infections are common in humans and animals worldwide. Ingestion of raw or undercooked meat containing tissue cysts of T. gondii is one major source of transmission of this parasite. It is important to guarantee the meat quality of China since our pork industry produces about half of the world's pork. In this study, a total of 746 pig samples were collected from Zhejiang and Jiangsu provinces in eastern China, and examined for T. gondii infection by PCR amplification targeting B1 gene. In this study, we found that 57 of 746 (7.6%) pigs were positive for B1 gene, with 8.5% (48/562) in Zhejiang province and 4.9% (9/184) in Jiangsu province, respectively. The positive DNA samples were further genotyped at 11 genetic markers, including SAG1, 5'-and 3'-SAG2, alternative SAG2, SAG3, BTUB, GRA6, L358, PK1, c22-8, c29-2, and an apicoplast locus Apico through PCR-restriction fragment length polymorphism (PCR-RFLP) technology. Two genotypes (ToxoDB 9 and ToxoDB 10) of T. gondii were identified by PCR-RFLP in Zhejiang province. However, both genotypes were not determined from Jiangsu province, which is speculated on the low DNA concentration and the small number of samples. These results indicate that T. gondii infection is endemic in pigs in eastern China and may raise public food safety concerns, suggesting more interventions for T. gondii-related risks are needed in the future.
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Affiliation(s)
- Hong-Chao Sun
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Yuan Fu
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Xiu-Fang Yuan
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Jun-Xing Li
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Li-Hua Xu
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Jia-Ning Zhang
- College of Animal Science, Tarim University, Alar, China
| | - Bin Yu
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Jing Huang
- Zhejiang Provincial Animal Disease Prevention and Control Center, Hangzhou, China
| | - Meng Qi
- College of Animal Science, Tarim University, Alar, China
| | - Tuan-Yuan Shi
- Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
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Shi YZ, Ren MS, Zhang N, Zhan YB, Zang GX, Sun HC. [The clinical and pathological analysis of osteoblastoma in the jaw: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:189-191. [PMID: 35152657 DOI: 10.3760/cma.j.cn112144-20210707-00317] [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)
- Y Z Shi
- Department of Pathology, School and Hospital of Stomatology, China Medical University, Liaoning Prorincial key Laboratory of Oral Diseases, Shenyang 110002, China
| | - M S Ren
- Department of Pathology, School and Hospital of Stomatology, China Medical University, Liaoning Prorincial key Laboratory of Oral Diseases, Shenyang 110002, China
| | - N Zhang
- Department of Pathology, School and Hospital of Stomatology, China Medical University, Liaoning Prorincial key Laboratory of Oral Diseases, Shenyang 110002, China
| | - Y B Zhan
- Department of Pathology, School and Hospital of Stomatology, China Medical University, Liaoning Prorincial key Laboratory of Oral Diseases, Shenyang 110002, China
| | - G X Zang
- Department of Pathology, School and Hospital of Stomatology, China Medical University, Liaoning Prorincial key Laboratory of Oral Diseases, Shenyang 110002, China
| | - H C Sun
- Department of Pathology, School and Hospital of Stomatology, China Medical University, Liaoning Prorincial key Laboratory of Oral Diseases, Shenyang 110002, China
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Sun HC, Huang J, Fu Y, Hao LL, Liu X, Shi TY. Enhancing Immune Responses to a DNA Vaccine Encoding Toxoplasma gondii GRA7 Using Calcium Phosphate Nanoparticles as an Adjuvant. Front Cell Infect Microbiol 2022; 11:787635. [PMID: 34976863 PMCID: PMC8716823 DOI: 10.3389/fcimb.2021.787635] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Accepted: 11/08/2021] [Indexed: 12/15/2022] Open
Abstract
Toxoplasma gondii infects almost all warm-blooded animals, including humans. DNA vaccines are an effective strategy against T. gondii infection, but these vaccines have often been poorly immunogenic due to the poor distribution of plasmids or degradation by lysosomes. It is necessary to evaluate the antigen delivery system for optimal vaccination strategy. Nanoparticles (NPs) have been shown to modulate and enhance the cellular humoral immune response. Here, we studied the immunological properties of calcium phosphate nanoparticles (CaPNs) as nanoadjuvants to enhance the protective effect of T. gondii dense granule protein (GRA7). BALB/c mice were injected three times and then challenged with T. gondii RH strain tachyzoites. Mice vaccinated with GRA7-pEGFP-C2+nano-adjuvant (CaPNs) showed a strong cellular immune response, as monitored by elevated levels of anti-T. gondii-specific immunoglobulin G (IgG), a higher IgG2a-to-IgG1 ratio, elevated interleukin (IL)-12 and interferon (IFN)-γ production, and low IL-4 levels. We found that a significantly higher level of splenocyte proliferation was induced by GRA7-pEGFP-C2+nano-adjuvant (CaPNs) immunization, and a significantly prolonged survival time and decreased parasite burden were observed in vaccine-immunized mice. These data indicated that CaPN-based immunization with T. gondii GRA7 is a promising approach to improve vaccination.
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Affiliation(s)
- Hong-Chao Sun
- Department of Animal Parasitology, Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Jing Huang
- Department of Animal Epidemic Surveillance, Zhejiang Provincial Animal Disease Prevention and Control Center, Hangzhou, China
| | - Yuan Fu
- Department of Animal Parasitology, Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
| | - Li-Li Hao
- College of Life Science and Technology, Southwest Minzu University, Chengdu, China
| | - Xin Liu
- College of Life Science and Technology, Southwest Minzu University, Chengdu, China
| | - Tuan-Yuan Shi
- Department of Animal Parasitology, Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Science, Hangzhou, China
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Sun HC. [Precise combination of systemic therapy and hepatic surgery]. Zhonghua Gan Zang Bing Za Zhi 2020; 28:901-904. [PMID: 33256272 DOI: 10.3760/cma.j.cn501113-20201022-00570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In China, the mortality rate of primary liver cancer ranks third among malignant tumors, so it is an imperative health issue. Surgery has always been an ideal treatment for early liver cancer, and an alternative treatment for some intermediate and advanced stage liver cancers. In recent years, significant progress has been made in the treatment of liver cancer, and relevant experts have begun to combine existing treatment methods into the early and intermediate-stage to explore drug treatment methods. Here, we will discuss the surgical and drug treatment issues, as well as the combination of the both, and their impact on future liver cancer treatment models.
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Affiliation(s)
- H C Sun
- Department of Liver Surgery and Transplantation, Zhongshan Hospital Fudan University, Shanghai 200032, China
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10
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Xue LY, Fu TT, Ding H, Zhu YL, Shen YH, Sun HC, Wang WP. [Predictive value of two-dimentional shear wave elastography in posthepatoectomy liver failure]. Zhonghua Yi Xue Za Zhi 2020; 100:3075-3080. [PMID: 33105958 DOI: 10.3760/cma.j.cn112137-20200228-00506] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the value of two-dimensional shear wave elastography (2D SWE) combined with clinical biochemical data in predicting posthepatoectomy liver failure (PHLF) in patients with hepatocellular carcinoma (HCC). Methods: A total of 274 HCC patients who underwent hepatectomy in Zhongshan Hospital Fudan University from January 2015 to January 2016 were retrospectively collected, including 235 males and 39 females, age 19-80 (56±11) years. All patients were confirmed to be HCC by postoperative pathology. The preoperative 2D SWE examination, laboratory examination results and intraoperative indicators were analyzed. According to the occurrence of PHLF after surgery, single factor analysis and multiple logistic regression analysis were performed on the above indicators to obtain a binary logistic regression model, and evaluate the diagnostic effect of the model on PHLF. In addition, 103 HCC patients from October 2019 to January 2020 were retrospectively collected as an external validation set, including 89 males and 14 females, age 23-80 (55±11) years old. Results: The liver stiffness measurement (LSM) obtained from 2D SWE, INR and Laminin (LN) were independent predictors of PHLF. The formula of prediction model PM=-15.451+0.095×LSM+11.7×INR+0.012×LN was obtained by combining above three factors. The area under the curve (AUC) of PHLF was 0.82, which was higher than that of end-stage liver disease model (MELD) score and Child-Pugh grading diagnosis of PHLF. The AUC of PHLF predicted by PM in the external validation group was 0.81. Conclusion: 2D SWE is helpful for clinicians to evaluate liver reserve function preoperatively and to predict the occurrence of PHLF in patients with HCC.
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Affiliation(s)
- L Y Xue
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging, Shanghai 200032, China
| | - T T Fu
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging, Shanghai 200032, China
| | - H Ding
- Department of Ultrasound, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Y L Zhu
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging, Shanghai 200032, China
| | - Y H Shen
- Department of Liver Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - H C Sun
- Department of Liver Surgery, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - W P Wang
- Department of Ultrasound, Zhongshan Hospital, Fudan University, Shanghai Institute of Medical Imaging, Shanghai 200032, China
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Zhang QY, Chen LL, Gao F, Sujie A, Hou YY, Huang XW, Huang C, Sun HC, Zhou J, Ji Y. [Pathological features of immune-mediated hepatitis due to immune checkpoint inhibitors and anti-angiogenesis targeted therapy]. Zhonghua Bing Li Xue Za Zhi 2020; 49:329-335. [PMID: 32268669 DOI: 10.3760/cma.j.cn112151-20190720-00403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the histologic features of immune-mediated hepatitis (IMH) due to immune checkpoint inhibitors (ICIs) monotherapy and combined ICIs anti-angiogenesis tyrosine kinases (TKIs) targeted therapy. Methods: Twenty-one IMH patients who had liver biopsy during ICIs treatment in Zhongshan Hospital of Fudan University from 2015 to 2019 were included. Among them, ten were treated with ICIs monotherapy, and 11 were treated with combined ICIs and anti-angiogenesis targeted therapy. The histologic features of IMH were assessed by HE staining and PD-L1/2 was evaluated by immunohistochemical staining. Results: Patients treated with monotherapy ICIs presented with different levels of lobular hepatitis and portal inflammation. Besides, there were also cholangitis, endothelialitis, Kupffer cells activation and peliosisi hepatitis. Eight cases (8/10) showed mild and two cases (2/10) showed moderate hepatic injury. As for patients receiving combined ICIs and TKIs therapy, the extent of IMH was more severe, with four cases (4/11) showing moderate-severe liver injury, with confluent or bridging necrosis, portal inflammation, cholangitis, interface hepatitis. Among these, one patient developed acute severe hepatitis with massive hepatocyte necrosis and died of multisystem dysfunction. In those cases with severe liver injury, many CD8 positive lymphocytes aggregated in the portal area and hepatic sinusoid, and PD-L1 was expressed in many endothelial cells. There were both 2 cases of death in ICIs monotherapy and combination therapy group. Among the latter group, 1 patient developed acute severe hepatitis with massive hepatocyte necrosis and died of multisystem dysfunction. Conclusion: Compared with ICIs monotherapy, combined ICIs and anti-angiogenesis targeted TKIs therapy may cause overlapping hepatic injury, leading to severe IMH.
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Affiliation(s)
- Q Y Zhang
- Department of Pathology, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - L L Chen
- Department of Pathology, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - F Gao
- Department of Pathology, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - Akesu Sujie
- Department of Pathology, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - Y Y Hou
- Department of Pathology, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - X W Huang
- Department of Liver Surgery, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - C Huang
- Department of Liver Surgery, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - H C Sun
- Department of Liver Surgery, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - J Zhou
- Department of Liver Surgery, Zhongshan Hospital of Fudan University, Shanghai 200032, China
| | - Y Ji
- Department of Pathology, Zhongshan Hospital of Fudan University, Shanghai 200032, China
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12
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Wang J, Tian ZL, Liu YP, Liu ZH, Sun HC, Ni SL. [Application of biological factor in cementum regeneration]. Zhonghua Kou Qiang Yi Xue Za Zhi 2019; 54:568-572. [PMID: 31378037 DOI: 10.3760/cma.j.issn.1002-0098.2019.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
At the present day, curettage and periodontal surgery comprise the main strategy for the treatment of periodontitis, however, these methods are limited in regenerating cementum. It has been found that some biological factors such asenamel matrix derivative (EMD), transforming growth factor-β (TGF-β) and insulin-like growth factor (IGF) could promote cementum regeneration. In the cementum regenerationstudies, there has been a lack of criteria to distinguish cementum from alveolar bone and other types of cementum. Therefore, this article will briefly review the biological factors that affect the cementum regeneration and the molecular markers used to judge the regenerating cementum.
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Affiliation(s)
- J Wang
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Z L Tian
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Y P Liu
- Department of Implantology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - Z H Liu
- Department of Prosthodontics, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
| | - H C Sun
- Department of Pathology, School of Stomatology, China Medical University & Liaoning Institute of Dental Research, Shenyang 110002, China
| | - S L Ni
- Department of Pathology, School and Hospital of Stomatology, Jilin University, Changchun 130021, China
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13
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Li XW, Sun HC, Liu XH. [Vascular endothelial growth factor-loaded microspheres promote dental pulp regeneration and vascularization]. Zhonghua Kou Qiang Yi Xue Za Zhi 2018; 53:42-48. [PMID: 29972963 DOI: 10.3760/cma.j.issn.1002-0098.2018.01.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the effect of vascular endothelial growth factor (VEGF)-loaded microspheres on dental pulp tissue regeneration and vascularization in vivo. Methods:In vitro release experiment and human umbilical vein endothelial cell migration experiment were conducted with VEGF loaded microspheres. The dental pulp stem cells (DPSC) were co-cultured with VEGF microspheres to observe the compatibility between the cells and the microspheres. DPSC and VEGF loaded microspheres were injected into the root lumen through the apical foramen, which were then transplanted subcutaneously into nude mice. Histological and immunohistochemical features were observed after nine weeks. Results: DPSCs attached and spread on the surface of the microspheres. HE staining showed that the regenerated pulp-like tissue fulfilled the whole apex and middle third of the root. Differentiated odontoblast-like cells aligned with the existing tubular root dentin. Conclusions: VEGF-loaded microspheres promoted the regeneration of pulp-like tissues and formation of blood vessels.
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Affiliation(s)
- X W Li
- Department of Endodontics, School of Stomatology, Jilin University, Changchun 130021, China
| | - H C Sun
- Department of Pathology, School of Stomatology, Jilin University, Changchun 130021, China
| | - X H Liu
- Department of Biomedical Sciences, Baylor College of Dentistry, Texas A&M University, Dallas TX 75246, U S A
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Zhuo XH, Sun HC, Huang B, Yu HJ, Shan Y, Du AF. Evaluation of potential anti-toxoplasmosis efficiency of combined traditional herbs in a mouse model. J Zhejiang Univ Sci B 2018; 18:453-461. [PMID: 28585421 PMCID: PMC5482040 DOI: 10.1631/jzus.b1600316] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Toxoplasma gondii is a worldwide spread protozoan and is able to infect almost all warm-blood animals. No effective drugs are available clinically on toxoplasmosis. Chinese traditional herbal medicines have provided remedies for many health problems. There exists a possibility that Chinese herbs may provide protection against T. gondii. This work aims to assess the protective efficacy of combined Chinese herbs against T. gondii. We screened five herbal medicines that have different pharmacological effects and combined them into a prescription according to the traditional Chinese medicine compatibility principle. The drug potential and protective efficacy were evaluated through a mouse model by determining the survival time, the parasite load in blood and tissues, the change of cell proportions in blood and histological detection. The results showed that the survival time of mice in the 500 mg Chinese herbs group and sulfadiazine group was significantly longer than that of the PBS control group. Also the parasite load in blood and tissues of 500 mg Chinese herbs and sulfadiazine groups was significantly lower than that of PBS group at 7 days post infection (dpi), which was in accordance with the result of histological detection. Monocyte and neutrophil of infected mice were remarkably increased while lymphocyte was dramatically decreased compared to that of blank group at 7 dpi. The results demonstrated that the 500 mg dosage of our Chinese herbs could slow down the replication of T. gondii and prolong the survival time of mice and could be considered as possible candidate drug against toxoplasmosis.
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Affiliation(s)
- Xun-Hui Zhuo
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.,Department of Immunity and Biochemistry, Institute of Parasitic Disease, Zhejiang Academy of Medical Sciences, Hangzhou 310013, China
| | - Hong-Chao Sun
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Bin Huang
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Hai-Jie Yu
- Jiaxing Vocational & Technical College, Jiaxing 314000, China
| | - Ying Shan
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Ai-Fang Du
- Institute of Preventive Veterinary Medicine & Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
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Sun HC, Wang CD, Li MY, Li LP, Zhao XL, Wang YP, Ye J. [Analysis of gene mutation and clinical characteristics in patients with idiopathic epilepsy]. Zhonghua Yi Xue Za Zhi 2017; 97:2439-2442. [PMID: 28835045 DOI: 10.3760/cma.j.issn.0376-2491.2017.31.011] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To explore the association between gene mutations and clinical characteristics in Chinese patients with epilepsy. Methods: A total of twenty-three patients with idiopathic epilepsy admitted to the Xuanwu Hospital of Capital Medical University from January 2014 to July 2016 were included.The age at onset of epilepsy ranged from 8 months to 31 years.All patients were screened for mutations by next-generation of sequencing (NGS), using a targeted capture panel of epilepsy and related seizures to screen forgene causative for or related to epilepsy.Some mutations were verified for inheritance by Sanger sequencing of two generations in the family.The differences in clinical characteristics among different mutation carriers were compared. Results: A total of 38 mutations were identified in 23 patients.Most of the patients presented with tonic-clonic seizures, and most were not accompanied by mental retardation.Causative genes were dominated by those encoding ion channel, enzyme and proteins with special functions.Although mutation carriers for genes encoding ion channel proteins and those with special functions were not significantly different in age at onset, types of seizure, family history or complications(P>0.05), patients presenting with tonic-clonic seizures had higher frequency of mutations in genes encoding ion channel (15/15)than those encoding proteins with special function(16/20)(P=0.066). Conclusions: NGS is a useful technology in detecting mutations in patients with various types of epilepsy and aiding in etiological diagnosis of the disease.Tonic-clonic seizures may correlate with mutations in genes encoding ion channel.
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Affiliation(s)
- H C Sun
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
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16
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Dong ZZ, Zhu XD, Li Z, Mao YG, Chai YL, Yao DF, Sun HC, Zhu JY, Ma KS. [Advances in basic and clinical research on hepatocellular carcinoma in 2016]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:85-93. [PMID: 28297792 DOI: 10.3760/cma.j.issn.1007-3418.2017.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Hepatocellular carcinoma (HCC) is still one of common malignant cancers worldwide, with increasing incidence and mortality rates. Early diagnosis and effective treatment for HCC remain to be explored. This article introduces the research advances in the early specific diagnosis and effective therapies for HCC in 2016, such as molecular markers in the specific diagnosis and targeted therapy for HCC, main therapeutic regimens, robot-assisted liver resection, and no-touch radiofrequency ablation.
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Affiliation(s)
- Z Z Dong
- Affiliated Hospital of Nantong University, Nantong Jiangsu Province 226001, China
| | - X D Zhu
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Z Li
- Department of Hepatobiliary Surgery, Key Laboratory of Liver Cirrhosis and Cancer in Beijing, People's Hospital, Peking University, Beijing 100044, China
| | - Y G Mao
- Department of Hepatobiliary Surgery, Key Laboratory of Liver Cirrhosis and Cancer in Beijing, People's Hospital, Peking University, Beijing 100044, China
| | - Y L Chai
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
| | - D F Yao
- Affiliated Hospital of Nantong University, Nantong Jiangsu Province 226001, China
| | - H C Sun
- Department of Liver Surgery, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - J Y Zhu
- Department of Hepatobiliary Surgery, Key Laboratory of Liver Cirrhosis and Cancer in Beijing, People's Hospital, Peking University, Beijing 100044, China
| | - K S Ma
- Institute of Hepatobiliary Surgery, Southwest Hospital, Third Military Medical University, Chongqing 400038, China
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17
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Shen YH, Chen S, Zhang WT, Ji Y, Yu L, Sun HC, Qiu SJ, Ren N, Zhou J. Clinical analysis of gastroenteropancreatic neuroendocrine tumor with liver metastasis, compared with primary hepatic neuroendocrine tumor. J Cancer Res Ther 2015; 10 Suppl:276-80. [PMID: 25693935 DOI: 10.4103/0973-1482.151532] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
OBJECTIVE The objective was to study the clinicopathologic features, grading, treatment protocols, and prognostic of gastroenteropancreatic neuroendocrine tumor (NET) with liver metastasis and primary hepatic NET. MATERIALS AND METHODS The clinical data of 34 patients with hepatic NET were retrospectively reviewed. According to the primary tumor location and 2010 World Health Organization classification, the cases were categorized to analyze the clinicopathologic features, treatment condition, and prognostic factors. RESULTS There was a marked male predominance either in gastroenteropancreatic NET liver metastasis group or primary group. Primary hepatic NET is mostly single nodule located in the right lobe of liver, and the metastatic hepatic NET is mostly from pancreas with multiple nodules and metastasizes to both lobes of the liver, with a high degree of malignancy and poor prognosis. There are 17 cases (50%) of NET and 17 cases (50%) of neuroendocrine carcinoma (NEC) in all the 34 patients of this study. The mitotic figure and Ki-67 proliferation index are both higher in NEC group than in NET group, which indicated highly malignancy of the NEC. The 5-year disease-free survival (DFS) rates for primary group and metastatic group were 30% and 40%, respectively (P > 0.05), while the 5-year survival rates were 35% and 66%, respectively (P > 0.05). Different tumor grade was found closely associated with 5-year DFS (P < 0.05) and overall survival (OS) (P < 0.05) in both groups. Furthermore, we found 5-year DFS of patients with primary site of the tumor located in the gastrointestinal tract was much lower than that located in pancreas (P < 0.05), while the 5-year OS showed no significant differences between two groups (P > 0.05). CONCLUSIONS Surgery is an effective method for the treatment of hepatic NET; tumor grading is an important determinant factor of prognosis.
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Affiliation(s)
| | | | | | | | | | | | | | - N Ren
- Department of Liver Surgery, Zhongshan Hospital, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - J Zhou
- Department of Liver Surgery, Zhongshan Hospital, Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai 200032, China
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Tang HT, Zhou YB, Zhu Y, Sun HC, Lin M, Zhan ZP. Base-Catalyzed NN Bond Cleavage of Hydrazones: Synthesis of α-Amino Ketones. Chem Asian J 2014; 9:1278-81. [DOI: 10.1002/asia.201400037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 01/17/2014] [Indexed: 12/12/2022]
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Zhu Y, Lu WT, Sun HC, Zhan ZP. Lewis Base Catalyzed Synthesis of Multisubstituted 4-Sulfonyl-1H-Pyrazole Involving a Novel 1,3-Sulfonyl Shift. Org Lett 2013; 15:4146-9. [DOI: 10.1021/ol401818m] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yu Zhu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Wen-Ting Lu
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Hong-Chao Sun
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
| | - Zhuang-Ping Zhan
- Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, P. R. China
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Liu Y, Sun SH, Xu J, Zhao L, Sun HC, Li J, Mu WW, Xu L, Chen KJ. Broadband antireflection and absorption enhancement by forming nano-patterned Si structures for solar cells. Opt Express 2011; 19 Suppl 5:A1051-A1056. [PMID: 21935247 DOI: 10.1364/oe.19.0a1051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this letter, we report the antireflection and light absorption enhancement by forming sub-wavelength nano-patterned Si structures via nano-sphere lithography technique. It is found that the surface reflection can be significantly suppressed in a wide spectral range (400-1000 nm) and the weighted mean reflection is less than 5%. Meanwhile, the broad band optical absorption enhancement is achieved consequently. Heterojunction solar cells are prepared by depositing ultrathin amorphous Si film on the nano-patterned Si structures, the short circuit current density increases to 37.2 mA/cm(2)and the power conversion efficiency is obviously improved compared to the reference cell on flat Si substrate.
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Affiliation(s)
- Y Liu
- National Laboratory of Solid State Microstructures, Department of Microelectronics and Optoelectronics and Department of Physics, Nanjing University, Nanjing, China
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21
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Li BC, Tian ZQ, Sun M, Xu Q, Wang XY, Qin YR, Xu F, Gao B, Wang KH, Sun HC, Chen GH. Directional differentiation of chicken primordial germ cells into adipocytes, neuron-like cells, and osteoblasts. Mol Reprod Dev 2010; 77:795-801. [PMID: 20722070 DOI: 10.1002/mrd.21224] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Primordial germ cells (PGCs) are useful for producing transgenic chickens and preserving genetic material in avian species. In this study, we investigated the in vitro differentiation potential of chicken PGCs into different cell types. For differentiation into adipocytes, chicken PGCs were cultured for 21 days in induction media containing dexamethasone, insulin and/or 3-isobutyl-1-methylxanthine (IBMX), and differentiation rates ranging from 74% to 91% were identified by oil red-O and alkaline phosphatase (ALP) staining. For differentiation into neuron-like cells, chicken PGCs were cultured for 3 or 7 days in the induction media containing retinoic acid (RA) and IBMX, and differentiation rates ranging from 71% to 87% were identified by toluidine blue staining and immunohistochemical staining. For differentiation into osteoblasts, chicken PGCs were cultured for 15 or 21 days in the induction media containing desamethasone, beta-glycerol phosphate and/or vitamin C, and differentiation rates ranging from 47% to 79% were confirmed by Von Kossa, cytochemical and immunohistochemical staining. These data suggest that, like mammalian PGCs, chicken PGCs can differentiate into different cell types in vitro.
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Affiliation(s)
- B C Li
- College of Animal Science and Technology, Yangzhou University, Yangzhou, China
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22
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Zhang SY, Sun HC. [Research progress on seaweed bed ecosystem and its engineering]. Ying Yong Sheng Tai Xue Bao 2007; 18:1647-53. [PMID: 17886664] [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: 05/17/2023]
Abstract
Seaweed bed ecosystem is one of the typical nearshore ecosystems. Because of its unique structure and function, the ecology and engineering of this ecosystem have received much attention around the world in recent years. In this paper, the concept, structure, and function of seaweed bed ecosystem, as well as the definition and implementing steps of seaweed bed ecosystem engineering were introduced, and the most recent development in the research of seaweed bed ecosystem in developed countries was reviewed, with the research projects in the United States and Japan as examples. More basic research in seaweed bed ecosystems in China was urgent to be conducted to promote the marine economy and the development of relevant sciences and technologies.
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Affiliation(s)
- Shou-Yu Zhang
- College of Marine Science & Technology, Shanghai Fisheries University, Shanghai 200090, China.
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Gao B, Sun HC, Fang HX, Qian K, Zhao MS, Qiu HL, Song CY, Wang ZY. Expression and preliminary characterization of recombinant human tissue kallikrein in egg white of laying hens. Poult Sci 2006; 85:1239-44. [PMID: 16830865 DOI: 10.1093/ps/85.7.1239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Human tissue kallikrein (hK1) plays an important role in regulation of blood pressure, electrolyte and glucose transport, and renal function. To evaluate the feasibility of expression of recombinant human tissue kallikrein (rhK1) in the egg whites of laying hens, human tissue kallikrein gene (hKLK1) cDNA was subcloned into the chicken oviduct-specific expression vector (pOV3), and the resultant recombinant vector pOV3K was injected into laying hens via wing vein after mixing with polyethyleneimine. Following injection twice with the recombinant vector, the enzymatic activity at a maximal level of 59 U/mL was detected in the egg whites, which lasted for more than 7 d. The expression level of rhK1 in the egg whites in the 3-mg group was relatively higher than that in the 2-mg group, but the significant differences were identified on d 7 and 8 (P < 0.05). Ten days after the primary injection, the hens were reinjected with the same dose of the vector, and even higher enzymatic activity was detected in their egg whites. Two different breeds of hen were tested with no difference in expression level found (P > 0.05). Western blot analysis of the egg whites from vector-injected hens showed the rhK1 was recognized by a polyclonal antibody specific for hK1 with molecular weights of 37 and 43 kDa, which probably corresponded to the mature and preenzyme, respectively. Biochemical studies showed that the recombinant enzyme had a similar thermostability, optimal pH, hypotensive effect, and sensitivity to different ions to the natural enzymes in human and porcine tissues. These data indicate that the chicken oviduct-specific transient expression system can produce relatively high level and authentic recombinant enzyme with a potential for further development for therapeutic use.
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Affiliation(s)
- B Gao
- College of Animal Science and Technology, Yangzhou University, People's Republic of China
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Wang L, Tang ZY, Qin LX, Wu XF, Sun HC, Xue Q, Ye SL. High-dose and long-term therapy with interferon-alfa inhibits tumor growth and recurrence in nude mice bearing human hepatocellular carcinoma xenografts with high metastatic potential. Hepatology 2000; 32:43-8. [PMID: 10869287 DOI: 10.1053/jhep.2000.8525] [Citation(s) in RCA: 109] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Postoperative recurrence of human hepatocellular carcinoma (HCC) is the major issue that must be addressed to further improve prognosis. This study was undertaken to investigate the effects of interferon-alfa-1b (IFN-alpha-1b) on recurrent tumor and metastasis after curative resection in nude mice bearing an HCC xenograft with high metastatic potential. Tumor tissues from LCI-D20, a metastatic model of HCC in nude mice, were orthotopically implanted in 105 nude mice. Eleven days later, 64 mice underwent curative resection of liver tumors. IFN-alpha at different doses was administered subcutaneously to mice with or without resection. In mice without resection, when comparison was made among control, IFN 7.5 x 10(6) U/kg/day, 1.5 x 10(7) U/kg/day for treated groups, and 3 x 10(7) U/kg/day; tumor volume was 8,475 mm(3) +/- 2,636 mm(3), 7,963 mm(3) +/- 3,214 mm(3), 769 mm(3) +/- 287 mm(3), and 13 mm(3) +/- 9 mm(3); incidence of lung metastasis being 100%, 80%, 40%, and 0%; life span was 45 +/- 4 days, 53 +/- 8 days, 81 +/- 6 days, and 105 +/- 24 days, respectively. In mice with curative resection, when comparison was made among control, IFN 5 x 10(5) U/kg/day, 1 x 10(6) U/kg/day, 4 x 10(6) U/kg/day, 7.5 x 10(6) U/kg/day, 1.5 x 10(7) U/kg/day, and 3 x 10(7) U/kg/day for treated groups; incidence of recurrent tumor was 100%, 100%, 87.5%, 100%, 87.5%, 62.5%, and 12.5%; lung metastasis being 100%, 75%, 87.5%, 50%, 62.5%, 0%, and 0%, respectively. IFN-alpha inhibited neovascularization induced by LCI-D20 tumor specimens implanted into the micropocket of nude mice corneas. In conclusion, high-dose and long-term therapy with IFN-alpha dose-dependently inhibits tumor growth and recurrence after resection of HCC. The effect of IFN-alpha may be attributed to antiangiogenesis in this experiment. These results provide potential clinical implication, particularly for the prevention of recurrence after curative resection of HCC.
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Affiliation(s)
- L Wang
- Liver Cancer Institute and Zhongshan Hospital, Shanghai Medical University, Shanghai, China
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Chen G, Sun HC, Cheng JM, Wang YH. [The clinical pathological observation of hemangioma treated by pingyangmycin]. Shanghai Kou Qiang Yi Xue 2000; 9:127. [PMID: 15014832] [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: 04/29/2023]
Affiliation(s)
- G Chen
- Department of Dentistry, Shijiazhuang Peace Hospital. Shijiazhuang 050082, Hebei province, China
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Zhou J, Tang ZY, Fan J, Wu ZQ, Li XM, Liu YK, Liu F, Sun HC, Ye SL. Expression of platelet-derived endothelial cell growth factor and vascular endothelial growth factor in hepatocellular carcinoma and portal vein tumor thrombus. J Cancer Res Clin Oncol 2000; 126:57-61. [PMID: 10641751 DOI: 10.1007/s004320050009] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
PURPOSE Both platelet-derived endothelial cell growth factor (PD-ECGF) and vascular endothelial growth factor (VEGF) are known to promote the development of new blood vessels, which are fundamental to tumor growth and metastasis. We aimed at evaluating the gene expression of PD-ECGF and VEGF in hepatocellular carcinoma (HCC) and portal vein tumor thrombus (PVTT). PATIENTS AND METHODS Surgical specimens (28 HCC, 28 nontumorous liver tissues and 18 PVTT) were studied by Northern blot analysis. The levels of PD-ECGF mRNA and VEGF mRNA expression were measured by densitometric scanning of the autoradiographs, and they were normalized to the level of expression of an internal control (glyceraldehydephosphate dehydrogenase) mRNA. RESULTS The expression rates of PD-ECGF mRNA in PVTT, HCC and nontumorous liver tissues were 77.8% (14/18), 67.9% (19/28) and 35.7% (10/28), being 88.9% (16/18), 75.0% (21/28) and 17.9% (5/28) respectively for VEGF mRNA. The expressions of PD-ECGF mRNA and VEGF mRNA were higher in HCC with PVTT than when PVTT was absent (P < 0.05). The PVTT was more often seen in patients with positive expression of both PD-ECGF mRNA and VEGF mRNA in HCC than in patients who were positive for only one of these factors or negative for both (P < 0.05). CONCLUSION Both PD-ECGF and VEGF correlated well with the formation of PVTT of HCC.
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Affiliation(s)
- J Zhou
- Liver Cancer Institute and Zhongshan Hospital, Shanghai Medical University, P.R. China
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27
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Li XM, Tang ZY, Qin LX, Zhou J, Sun HC. Serum vascular endothelial growth factor is a predictor of invasion and metastasis in hepatocellular carcinoma. J Exp Clin Cancer Res 1999; 18:511-7. [PMID: 10746978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Tumor progression is angiogenesis dependent, and vascular endothelial growth factor (VEGF) is a key growth factor in this process. sVEGF concentrations in 44 patients with hepatocellular carcinoma (HCC) and 5 with benign liver lesions were determined with an enzyme-link immunoadsorbent assay system (ELISA). Reverse transcript-polymerase chain reaction (RT-PCR) was carried out on surgical specimens of 51 patients with HCC. The relative levels of VEGF mRNA expression were measured by determining a ratio between PCR products of VEGF and the endogenous internal standard gene b-actin. UEA-1 was histochemically used to count microvascularity in tumor tissue. Elevated sVEGF concentrations were found in patients with HCC (172.84+/-111.75 pg/ml) as compared to individuals with benign liver lesions (95.74+/-36.20 pg/ml, P<.05). Of 44 cases with HCC, sVEGF concentrations in the patients with PV-emboli or with poor-encapsulated tumors were significantly higher than in those without PV-emboli or with well-encapsulated tumors (P<0.05). The expression levels of VEGF mRNA in tumors with PV-emboli and in poor-encapsulated tumors were higher than in those without PV-emboli and in well-encapsulated tumors (P<0.05). Microvascular density in HCC tissues was significantly correlated with the expression levels of VEGF mRNA (P<0.01; r=0.7). Circulating VEGF was derived from HCC tissue. sVEGF concentrations could be a new marker for predicting the angiogenesis, invasion and metastasis of HCC.
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Affiliation(s)
- X M Li
- Liver Cancer Institute and Zhongshan Hospital, Shanghai Medical University, P.R. China
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28
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Abstract
PURPOSE To elucidate the relationship between angiogenesis and prognosis after curative resection of hepatocellular carcinoma (HCC). METHODS An immunohistochemical study using anti-CD34 monoclonal antibody was carried out on surgical specimens from 78 HCC patients who had undergone curative resection; microvessel density (MVD) was counted and the overall survival and disease-free survival were analyzed retrospectively. RESULTS Blood vessels in the tumor were strongly stained by anti-CD34 antibody, but not those in the surrounding liver parenchyma. There were three types of tumor vessels: capillary-like (n = 59), sinusoid-like (n = 16) and mixed-type (n = 3). The median MVD count was 100 per field. The HCC were designated as hypovascular (n = 36) with an MVD count below 100, and hypervascular (n = 42) with an MVD count of 100 or more per field. The 5-year survival and disease-free survival rates were 49.7% and 42.8% respectively, and statistical analysis showed that the MVD level was not correlated with tumor size, capsule status, Edmondson's grade, alpha-fetoprotein level, associated cirrhosis, gamma-glutamyltransferase, and serum HBsAg status. The sinusoid-like tumor vessels appeared more frequently in the more differentiated tumors (P<0.05). No statistical difference in overall and disease-free survival between different MVD levels and microvessel types was found. Tumor size was the only predicting factor in the entire series. In patients with small HCC (< or =5 cm, n = 40), 5-year survival and disease-free survival rates were 58.9% and 52.7% respectively, higher than the values in large HCC (39.8% and 32.0% respectively, P<0.05). The MVD level was an independent predicting factor of disease-free survival, 5-year disease-free survival in the hypovascular group (74.6%) being better than that in the hypervascular group (34.7%, P<0.05). CONCLUSIONS The MVD level was not related to tumor size, capsule statuo, Edmondson's grade, alpha-fetoprotein level, associated cirrhosis, gamma-glutamyltransferase and serum HBsAg status. In the entire series, tumor size was the only factor influencing survival after curative resection. However, in patients with small HCC, the MVD level was an independent factor of disease-free survival. The pathological and clinical implications of different types of tumor vessels in HCC remain to be studied.
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Affiliation(s)
- H C Sun
- Liver Cancer Institute and Zhong Shan Hospital, Shanghai Medical University, P.R. China
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29
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Sun HC, Tang ZY, Zhou G, Li XM. KAI1 gene expression in hepatocellular carcinoma and its relationship with intrahepatic metastases. J Exp Clin Cancer Res 1998; 17:307-11. [PMID: 9894767] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
KAI1 gene is a novel metastasis suppressor gene. Its transcription level has been reported to be related with metastases in several kinds of tumors. The Authors used RT-PCR method to investigate the expression levels of KAI1 gene in hepatocellular carcinoma (HCC) tissues from 42 patients. The results demonstrated that 57.1% of tumor tissues were positive in KAI1 expression. There was no statistically significant difference on KAI1 gene expression rate between large (>5 cm) and small (<=5 cm) tumors, encapsulated and non-capsulated tumors, as well as alpha-fetoprotein (AFP) positive (>20 ug/ml) and negative (<=20 ug/ml) tumors; however, the expression rate was higher in tumors without intrahepatic metastasis than in those with intrahepatic metastasis (63.9% vs. 16.7%, P<0.05). It is suggested that KAI1 gene expression may be related to the metastases of hepatocellular carcinoma.
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Affiliation(s)
- H C Sun
- Liver Cancer Institute and Zhong Shan Hospital, Shanghai Medical University, China
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30
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Zhou G, Liu KD, Sun HC, Chen YH, Tang ZY, Schröder CH. Expression and purification of single-chain anti-HBx antibody in Escherichia coli. J Cancer Res Clin Oncol 1998; 123:609-13. [PMID: 9620218 DOI: 10.1007/s004320050113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Monoclonal antibodies have been widely used in tumor targeting studies with promising results. However, their clinical application has been limited by heterogeneity and macro-molecular movement of murine antibody. In this study, the variable-region (heavy- and light-chain) fragments of anti-HBx monoclonal antibody were enriched by the polymerase chain reaction. The expression vector, which included a 6x histidine sequence in the 3' terminus of the HBx single-chain antibody (sFv) was recombined with a linker sequence (KLGGGGFSGA) between the variable regions. The expression product from Escherichia coli fused with 6xHis was purified by nickel (Ni2+) nitrilotriacetate chelating resin. The results of enzyme-linked immunosorbent assay and Western blotting showed that sFv had binding affinity with HBxAg, suggesting that it could become a novel targeting carrier in clinical trials.
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Affiliation(s)
- G Zhou
- Liver Cancer Institute, Shanghai Medical University, PR China
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31
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Sun HC, Deng PF, Wang CJ, Jia TH, Lai JQ, Zhang W, Wang XX, Xiu HM. Liver involvement in epidemic haemorrhagic fever: in situ hybridization, immunohistochemical and pathological studies. J Gastroenterol Hepatol 1997; 12:540-6. [PMID: 9257248 DOI: 10.1111/j.1440-1746.1997.tb00481.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In the present study, liver biopsy specimens from 37 patients with epidemic haemorrhagic fever (EHF) were investigated by using light and electron microscopy, immunohistochemistry for the EHF virus envelope protein G2 and in situ hybridization (ISH) for EHF viral RNA. Immunostaining and in situ hybridization were both positive, and a few of the aetiological agents, the EHF virus (EHFV) particles, were found individually within the dilated Golgi cisternae and vesicles, and the dilated rough endoplasmic reticulum of the hepatocyte. The pathological alterations of the liver cells infected with EHFV were: hepatocellular degeneration, cytoplasmic vacuolation, and spotty necrosis; moreover, zonal necrosis was present and adjacent to the narrowed and occluded sinusoids. In degenerated and spotty necrotic cells, the positive signals from of ISH for EHFV RNA and those from immunostaining for the virus protein were both stronger than those in the zonal liver cell necrosis area. The results showed that hepatocellular degeneration and spotty necrosis might be directly related to the virus and its duplication inside the liver cells, while the zonal necrosis was ischaemic and thought to be caused by microcirculation dysfunction.
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Affiliation(s)
- H C Sun
- Department of Pathology, Bethune International Peace Hospital, Shijiazhuang, Hebei, China
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32
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Jia TH, Sun HC, Wang XX, Xiu HM, Ding WD, Hao XD, Wu L, Wang GX, Lei JZ. Ultrastructural observation on macrophage-lymphocyte interactions in semen from Tripterygium wilfordii Hook.f. takers. Chin Med J (Engl) 1994; 107:892-6. [PMID: 7882725] [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
Sixty-nine specimens from Tripterygium Wilfordii Hook.f. (TWH) users were investigated by electron microscopy. No macrophages were demonstrated in the 21 specimens collected prior to the administration of TWH. However, it was found in 23 out of the 48 semen specimens obtained following the TWH administration. The macrophages were functionally active as shown by the presence of a large number of cytoplasmic processes and pseudopodia on the surface, and primary and secondary lysosomes in the cytoplasm. The macrophages phagocytized sperm debris and degenerated or dead spermatids with formation of specific phagosomes. Around those macrophages, lymphocytes were commonly noted. The cytoplasmic processes of the two cell types could come into contact or even fuse with each other, leading to tight junction-like structure; in some of the contacts, the plasma membranes were found dissolved so as to form direct cytoplasmic linkage.
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Affiliation(s)
- T H Jia
- Bethune International Peace Hospital, Shijiazhuang
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33
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Shen Y, Shi FW, Chen Y, Yuan GQ, Sun HC. Relationship between microvascular structure and biological characteristics of giant cell tumour of bone. Chin Med J (Engl) 1994; 107:368-70. [PMID: 7924579] [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
The vascular architecture of bone giant cell tumor was observed histologically with resin cast technique and scanning electron microscopy. Three types of capillaries were noted in the tumor tissue: extruding club-like capillary in the outer zone of the tumor; sinusoid capillary running disorderly in the intermediate zone; cecum capillary in the central zone. The pattern of vascular structure was believed to be correlated with tumor growth.
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Affiliation(s)
- Y Shen
- Department of Orthopedics, Third Affiliated Hospital, Hebei Medical College, Shijiazhuang
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34
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Sun HC, Whittaker EA, Bae YW, Ng CK, Patel V, Tam WH, McGuire S, Singh B, Gallois B. Combined wavelength and frequency modulation spectroscopy: a novel diagnostic tool for materials processing. Appl Opt 1993; 32:885-893. [PMID: 20802763 DOI: 10.1364/ao.32.000885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
By applying both low-frequency wavelength modulation and high-frequency phase modulation to a laser diode, we develop a sensitive, high-bandwidth chemical diagnostic tool that is applicable to a variety of gas-phase processing environments. Specific chemical species are identified and monitored through their infrared absorption spectra, and the modulation methods allow for sensitive detection that is free of window and other reflection-driven interference fringes. Absorbance limits of 5.3 x 10(-8) and 1.9 x 10(-7) are obtained for an AlGaAs diode laser and a lead-salt diode laser, respectively. We discuss applications to plasma etching and chemical vapor deposition.
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Abstract
When used for trace-gas detection, laser absorption spectroscopy is usually limited by false absorption signals that are traceable to interferometric effects induced by windows and other pairs of optical surfaces. Here we introduce a new technique that can selectively reject these étalon fringes while preserving the true absorption signal over a wide range of étalon free spectral range to absorption linewidth ratios. We present a theoretical analysis and experimental verification by using a tunable lead salt diode laser.
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36
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Chow L, Sun HC, Chen HY, Lin SY, Wu JS. Detection and differentiation of dengue-1 from Japanese encephalitis virus infections by ABC MAC-ELISA. Zhonghua Min Guo Wei Sheng Wu Ji Mian Yi Xue Za Zhi 1992; 25:172-80. [PMID: 1342002] [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
An IgM antibody capture enzyme linked immunosorbent assay using avidin biotin complex system (ABC MAC-ELISA) was established for the detection and differentiation of dengue-1 and Japanese encephalitis virus infections. The cut-off value of MAC-ELISA was based on the mean value of optical density at 490 nm of seven negative human sera carried along in each assay multiplied by 2.1. The specificity of MAC-ELISA tested on 200 healthy enrolled male serum was 99.5% and 98.0% for dengue-1 and Japanese encephalitis IgM, respectively. Two hundred and sixty-six acute or followed-up dengue serum specimens which were identified to possess dengue-1 virus by virus isolation technique using C6/36 cell line and monoclonal antibody immunofluorescent assay (IFA) were tested by MAC-ELISA for IgM antibodies to dengue-1 and Japanese encephalitis virus infection. The positivity of IgM antibody for serum collected from day 1 to day 7 after onset of the disease was 0.0%, 0.0%, 7.6% 14.2%, 25.0%, and 77.7% by each consecutive day, correspondingly, for those collected from day 8 to two month was 96.7% overall. By comparison the P/N value of dengue-1 IgM to JE IgM, 98.5% and 96.8% of the dengue-1 and Japanese encephalitis suspected serum specimens could be distinguished from each other, respectively. MAC-ELISA is a convenient, rapid, sensitive and specific method for the detection and differentiation of dengue-1 from Japanese encephalitis virus infections.
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Affiliation(s)
- L Chow
- National Institute of Preventive Medicine, Department of Health, Taipei, R.O.C
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37
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Hassan HM, Sun HC. Regulatory roles of Fnr, Fur, and Arc in expression of manganese-containing superoxide dismutase in Escherichia coli. Proc Natl Acad Sci U S A 1992; 89:3217-21. [PMID: 1565612 PMCID: PMC48837 DOI: 10.1073/pnas.89.8.3217] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Transcriptional regulation of the sodA gene, encoding the manganese superoxide dismutase (superoxide: superoxide oxidoreductase, EC 1.15.1.1) of Escherichia coli, was studied by monitoring expression of sodA-lacZ in different genetic backgrounds and under different growth conditions. Mutations in the fnr gene were found to affect aerobic and anaerobic expression of sodA-lacZ. Potential Fnr-binding sites were identified in the promoter region of sodA. Strains harboring simultaneous mutations in arcA/B and fur expressed sodA-lacZ under anaerobic growth conditions but were still inducible by iron chelators. However, in the triple mutants (fnr fur arcA/B) sodA-lacZ was fully expressed under anaerobiosis and was not further induced by the presence of 2,2'-dipyridyl, nitrate, or oxidants. On the other hand, aerobic expression of sodA-lacZ from a Fur-strain was approximately 3.8-fold higher than that from the wild-type strain but was diminished by introducing mutations in fnr or arcA/B. In conclusion, Fnr, Arc, and Fur act as anaerobic repressors of sodA. Furthermore, the regulation of sodA by Fur (ferric uptake regulation protein), Arc (aerobic respiratory control), and Fnr (fumarate nitrate reduction/regulator of anaerobic respiration) is independent of the superoxide response regulon SoxRS.
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Affiliation(s)
- H M Hassan
- Department of Biochemistry, North Carolina State University, Raleigh 27695-7622
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Hsu HM, Wang YF, Lo SH, Sun HC, Yip KK, Chen JS, Chuang CH, Chen DS. Hepatitis D virus infection among intravenous drug abusers in Taiwan: analysis of risk factors and liver function tests. J Med Virol 1990; 31:76-81. [PMID: 2388047 DOI: 10.1002/jmv.1890310203] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
To investigate the prevalence of hepatitis D virus (HDV) and hepatitis B virus (HBV) infection among intravenous drug abusers in Taiwan, a total of 761 male prisoners, including 680 intravenous drug abusers, were studied for serological markers of HBV and HDV. Questionnaires were distributed to evaluate the risk factors for HDV infection and also to estimate the strength of association among HDV infection and the risk factors. HBV infection was common, and the positive rates of HBV markers between intravenous drug abusers and non-drug abusers were not statistically different. However, the positive rate of the antibody to HDV was significantly higher among intravenous drug abusers than among non-drug abusers (21.3% vs. 8.6%). Of 131 chronic HBV carriers with intravenous drug abuse, 119 (91%) were anti-HD positive. Using multiple logistic regression models, we found that the most important risk factor for HDV infection was hepatitis B surface antigen (HBsAg) carriage, and intravenous drug addiction the next. A matched case-control study also was conducted to compare liver function tests among both anti-HD- and HBsAg-positive group anti-HD-negative, and HBs-AG-positive group as well as those with neither positive. Statistically significant difference in liver function tests was not found. It is concluded that the HBsAg carriers with intravenous drug abuse in Taiwan are commonly HDV infected with and that the infection does not seem to affect the liver as assessed by liver function tests.
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Affiliation(s)
- H M Hsu
- Bureau of Disease Control, Department of Health, Taipei, Taiwan, Republic of China
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39
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Lin RY, Sun HC, Chen A. [Lipoid proteinosis--report of a case]. Taiwan Yi Xue Hui Za Zhi 1986; 85:87-93. [PMID: 3458875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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40
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Yao TH, Chang H, Sun HC. [The properties of the nasopharyngeal carcinoma cell (CNE) strain adapted to grow at high temperature: alteration in phenotypic parameters shown by transformed cells]. Shi Yan Sheng Wu Xue Bao 1985; 18:25-31. [PMID: 3834720] [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: 01/07/2023]
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41
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Hsu NH, Lin SR, Hsu ST, Liu JY, Sun HC, Yang BS, Hsu LC, Lin CC. [An outbreak of hepatitis A in Lin-Kou, Taipei County in 1982]. Taiwan Yi Xue Hui Za Zhi 1984; 83:1222-31. [PMID: 6597852] [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: 01/20/2023]
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42
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Liu JY, Sun HC, Hsu LC, Chang YM, Lin CC, Chen CL. [Prevalence of HBV serological markers in parturients in Taipei area]. Taiwan Yi Xue Hui Za Zhi 1984; 83:430-435. [PMID: 6590777] [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: 05/21/2023]
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