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Wang MM, Crous PW, Sandoval-Denis M, Han SL, Liu F, Liang JM, Duan WJ, Cai L. Fusarium and allied genera from China: species diversity and distribution. Persoonia 2022; 48:1-53. [PMID: 38234691 PMCID: PMC10792286 DOI: 10.3767/persoonia.2023.48.01] [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] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 12/14/2021] [Indexed: 01/19/2024]
Abstract
The genus Fusarium includes numerous important plant and human pathogens, as well as many industrially and commercially important species. During our investigation of fungal diversity in China, a total of 356 fusarioid isolates were obtained and identified from diverse diseased and healthy plants, or different environmental habitats, i.e., air, carbonatite, compost, faeces, soil and water, representing hitherto one of the most intensive sampling and identification efforts of fusarioid taxa in China. Combining morphology, multi-locus phylogeny and ecological preference, these isolates were identified as 72 species of Fusarium and allied genera, i.e., Bisifusarium (1), Fusarium (60), and Neocosmospora (11). A seven-locus dataset, comprising the 5.8S nuclear ribosomal RNA gene with the two flanking internal transcribed spacer (ITS) regions, the intergenic spacer region of the rDNA (IGS), partial translation elongation factor 1-alpha (tef1), partial calmodulin (cam), partial RNA polymerase largest subunit (rpb1), partial RNA polymerase second largest subunit (rpb2) gene regions, and partial β-tubulin (tub2), were sequenced and employed in phylogenetic analyses. A genus-level phylogenetic tree was constructed using combined tef1, rpb1, and rpb2 sequences, which confirmed the presence of four fusarioid genera among the isolates studied. Further phylogenetic analyses of two allied genera (Bisifusarium and Neocosmospora) and nine species complexes of Fusarium were separately conducted employing different multi-locus datasets, to determine relationships among closely related species. Twelve novel species were identified and described in this paper. The F. babinda species complex is herein renamed as the F. falsibabinda species complex, including descriptions of new species. Sixteen species were reported as new records from China. Citation: Wang MM, Crous PW, Sandoval-Denis M, et al. 2022. Fusarium and allied genera from China: species diversity and distribution. Persoonia 48: 1-53. https://doi.org/10.3767/persoonia.2022.48.01.
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Affiliation(s)
- M M Wang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P. R. China
- College of Life Science, University of ChineseAcademy of Sciences, Beijing 100049, P. R. China
| | - P W Crous
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
- Wageningen University and Research Centre (WUR), Laboratory of Phytopathology, Droevendaalsesteeg 1, 6708 PB Wageningen, The Netherlands
| | - M Sandoval-Denis
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands
| | - S L Han
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P. R. China
- College of Life Science, University of ChineseAcademy of Sciences, Beijing 100049, P. R. China
| | - F Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P. R. China
| | - J M Liang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P. R. China
| | - W J Duan
- Ningbo Academy of Inspection and Quarantine, Ningbo 315012, P. R. China
- Ningbo Customs, Ningbo 315012, P. R. China
| | - L Cai
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, P. R. China
- College of Life Science, University of ChineseAcademy of Sciences, Beijing 100049, P. R. China
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Lee PY, Hou BL, Sun ZC, Kang DA, Han SL, Zhang T, Xu D, Yan TF, Zhang B. Design, qualification & manufacture of ITER gravity supports. Heliyon 2020; 6:e03609. [PMID: 32258467 PMCID: PMC7114748 DOI: 10.1016/j.heliyon.2020.e03609] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 11/04/2019] [Accepted: 03/12/2020] [Indexed: 11/29/2022] Open
Abstract
As one of the key components to support all the magnet coils, the GS faces engineering challenge to its operational safety throughout the design, qualification and manufacturing process as a result of extreme loading condition. The structural safety of GS was confirmed by both the FEM analysis and the semi-prototype engineering test after a long time of design, qualification, manufacture and assembly. Welding the cooling pipe to the flexible plate without obvious deformation as well as tightening uniformly and precisely all the tie rods to clamp the plates were carried out successfully during manufacturing. The result of final vacuum leakage test indicates that the GS can not only meet the ITER vacuum requirement but also have no slow out-gassing. The first set of GS which has passed the ITER acceptance test is to be delivered to ITER construction site soon.
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Affiliation(s)
- P Y Lee
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - B L Hou
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - Z C Sun
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - D A Kang
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - S L Han
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - T Zhang
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - D Xu
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - T F Yan
- Southwestern Institute of Physics (SWIP), P. O. Box 432, Chengdu, China
| | - B Zhang
- China International Nuclear Fusion Energy Program Executive Center (CNDA), Fuxing Road, Beijing, China
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Fu T, Zhang F, Alajmi Z, Yang SY, Wu F, Han SL. Sol-Gel Derived Antibacterial Ag-Containing ZnO Films on Biomedical Titanium. J Nanosci Nanotechnol 2018; 18:823-828. [PMID: 29448499 DOI: 10.1166/jnn.2018.13967] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
ZnO and Ag-containing ZnO (ZnO/Ag) films with the Ag/Zn molar ratio of 3.3 and 9.1%, respectively were sol-gel coated on biomedical titanium for antibacterial and bioactive surface modification. X-ray diffraction analysis indicates that ZnO peaks increase with the calcination temperature of the samples. Scanning electron microscopy and energy dispersive of X-ray analyses reveal Ag-rich white particles (300~750 nm) on ZnO/Ag samples that were calcined at 400 °C. X-ray photoelectron spectroscopy analysis of ZnO/Ag samples shows that Zn and O exist as ZnO and Ag presents in metallic state. The coating samples exhibit similar UV light-induced hydrophilic conversion behavior. Potentiodynamic polarization test in a Ca-free Hank's balanced solution demonstrates better corrosion resistance of the coating samples compared with the polished sample. In the in vitro bioactivity test using the simulated body fluid, a layer of apatite is gradually deposited on the surface of sample ZnO/9Ag after 12 days of soaking. The MTT assay test shows that ZnO and ZnO/Ag films have weak compatibility with the L929 cells. The antibacterial test against E. Coli by the disk diffusion assay reveals that antibacterial activity of the coating samples increases with silver content of the films.
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Affiliation(s)
- T Fu
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - F Zhang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - Z Alajmi
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - S Y Yang
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
| | - F Wu
- School of Medicine, Xi'an Jiaotong University, Xi'an 710061, P. R. China
| | - S L Han
- Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P. R. China
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Han SL, Wan SL, Li QT, Xu DT, Zang HM, Chen NJ, Chen LY, Zhang WP, Luan C, Yang F, Xu ZW. Is vertebroplasty a risk factor for subsequent vertebral fracture, meta-analysis of published evidence? Osteoporos Int 2015; 26:113-22. [PMID: 25149856 DOI: 10.1007/s00198-014-2848-5] [Citation(s) in RCA: 25] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Accepted: 08/10/2014] [Indexed: 10/24/2022]
Abstract
UNLABELLED In our paper, we systemically retrieved the eligible study evaluating whether increased incidence of subsequent vertebral fracture is associated with vertebroplasty. Main effect sizes were vertebral fracture rates reported in terms of hazard ratio (HR) for time-to-event data or relative risk (RR) for dichotomous outcome. Our results do not support the hypothesis that vertebroplasty contributes to increased risk of subsequent vertebral fracture, neither adjacent nor total vertebral fracture. INTRODUCTION Vertebroplasty has been implicated in significant changes in vertebral strength, vertebral shape, and consequently increased risk for subsequent vertebral fracture, especially the adjacent level. Here, we further tested the hypothesis whether new-onset vertebral fracture is a natural result of osteoporosis or consequence of cement augmentation. METHODS Relevant literatures were retrieved using PubMed, Web of Knowledge, and Cochrane Central Register of Controlled Trials (CENTRAL), supplemented by a hand-search of the reference lists of selected articles. Eligible studies assessed whether increased morbidity of subsequent vertebral fracture is associated with vertebroplasty. Main effect sizes were vertebral fracture rates reported in terms of hazard ratio (HR) for time-to-event data or relative risk (RR) for dichotomous outcome. Random-effects model was used to account for clinical or methodological heterogeneity across studies. RESULTS Thirteen studies with a number of 2,551 individuals (1,631 in vertebroplasty group and 920 in control group) were suitable for this meta-analysis. In trials that reported adjacent vertebral fracture as time-to-event data (two trials, n = 328), we found a similar incidence of vertebral fracture in percutaneous vertebroplasty (PVP) group compared to conservative therapy (HR 0.60, 95% confidence interval 0.29 to 1.26; P = 0.18). In trials that reported overall vertebral fracture as time-to-event data (three trials, n = 704), vertebroplasty was associated with a slightly increased but non-significant risk for vertebral fracture (HR 1.14, 95% confidence interval 0.65 to 2.00; P = 0.65). The outcome was further confirmed in the secondary meta-analysis of studies that reported vertebral fracture as dichotomous data. Subgroup analysis according to study design revealed no difference either. CONCLUSIONS Our results do not support the hypothesis that vertebroplasty contributes to increased risk of subsequent vertebral fracture, neither adjacent nor total vertebral fracture. However, adequately designed randomized controlled trials are warranted to confirm the present findings.
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Affiliation(s)
- S L Han
- Department of Orthopaedics, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 3 East Qingchun Road, Hangzhou, Zhejiang, 310016, China
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Li PY, Pan CJ, Hou BL, Han SL, Sun ZC, Savary F, Fu YK, Gallix R, Mitchell N. The Development of Material and Fabrication Technologies for ITER Magnet Supports. Fusion Science and Technology 2012. [DOI: 10.13182/fst12-a13380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- P. Y. Li
- Southwestern Institute of Physics, P.O. Box 422, Chengdu 610041, P. R. China
| | - C. J. Pan
- Southwestern Institute of Physics, P.O. Box 422, Chengdu 610041, P. R. China
| | - B. L. Hou
- Southwestern Institute of Physics, P.O. Box 422, Chengdu 610041, P. R. China
| | - S. L. Han
- Southwestern Institute of Physics, P.O. Box 422, Chengdu 610041, P. R. China
| | - Z. C. Sun
- Southwestern Institute of Physics, P.O. Box 422, Chengdu 610041, P. R. China
| | - F. Savary
- ITER Organization, Tokamak Department, Cadarache 12108 St. Paul-Lez-Durance, France
| | - Y. K. Fu
- Southwestern Institute of Physics, P.O. Box 422, Chengdu 610041, P. R. China
| | - R. Gallix
- ITER Organization, Tokamak Department, Cadarache 12108 St. Paul-Lez-Durance, France
| | - N. Mitchell
- ITER Organization, Tokamak Department, Cadarache 12108 St. Paul-Lez-Durance, France
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Han SL, Li JL, Liu Z, Cheng J, Guo SC, Wu SL. Malignant rhabdoid tumor of rectum: report of a case. Tech Coloproctol 2010; 14:199-200. [PMID: 20390315 DOI: 10.1007/s10151-010-0575-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Accepted: 03/18/2010] [Indexed: 10/19/2022]
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Han SL, Chen XX, Zheng XF, Yan JY, Shen X, Zhu GB. The clinicopathological behaviour and surgical treatment of abdominal Castleman's disease. Singapore Med J 2010; 51:813-816. [PMID: 21103818] [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: 05/30/2023]
Abstract
INTRODUCTION Castleman's disease, a rare atypical lymphoproliferative disorder of the lymphoid tissue with unknown cause, remains a diagnostic challenge. This study was conducted to analyse the clinicopathological behaviour and reasonable surgical treatment for patients with abdominal Castleman's disease. METHODS The medical records of seven patients with abdominal Castleman's disease were reviewed. RESULTS The patients comprised two men and five women, and their median age was 42.3 (range 29-53) years. The main clinical manifestation was an abdominal mass or an enlargement of the retroperitoneal lymph node. Other clinical manifestations included anaemia, loss of body weight and hypoalbuminaemia. The mean size of the tumour was 5.5 (range 4.0-8.0) cm. Postoperatively, all the patients were diagnosed with a hyaline vascular type of the disease, and had localised manifestations of the disease. All seven patients underwent complete surgical resection, two of whom also received adjuvant irregular chemotherapy (CHOP) and steroids postoperatively. All the patients survived, with no evidence of recurrence. One patient had survived for more than two years, four patients for more than three years, and two patients for more than five years. CONCLUSION Abdominal Castleman's disease is difficult to diagnose preoperatively, and surgical excision remains the treatment of choice, especially for localised disease.
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Affiliation(s)
- S L Han
- Department of General Surgery, The First Affiliated Hospital of Wenzhou Medical College, Wenzhou City 325000, Zhejiang Province, China.
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Han SL, Wu XL, Jia ZR, Wang PF. Adult hepatic cavernous haemangioma with highly elevated alpha-fetoprotein. Hong Kong Med J 2010; 16:400-402. [PMID: 20890007] [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: 05/29/2023] Open
Abstract
A 35-year-old Chinese man presented with dull pain in the right hypochondrial region for the previous 2 months. Laboratory examination revealed that his serum alpha-fetoprotein level was 1890 microg/L (reference range, 0-20 microg/L), and computed tomographic scan showed a hypodense lesion in the left liver lobe. At laparotomy, a dark reddish soft tumour (3.0 x 3.5 cm in diameter) was found in the medial segment of the liver (segment III). The tumour became markedly smaller than that before resection, and a vessel-like structure was found on the cut surface. Intra-operative pathology and postoperative histopathology examinations revealed that the tumour was a cavernous haemangioma of the liver. The serum alpha-fetoprotein level decreased to 3.5 microg/L by the fourth postoperative week. Clinicians should be aware that some rare tumours besides hepatocellular carcinoma and endodermal sinus tumours (yolk sac tumour), for example, hepatic haemangioma, can produce alpha-fetoprotein.
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Affiliation(s)
- S L Han
- Department of General Surgery, The First Affiliated Hospital of Wenzhou Medical College, Wenzhou City 325000, Zhejiang Province, PR China.
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Han SL, Tang HJ, Hua YW, Ji SQ, Lin DX. Expression of COX-2 in stomach cancers and its relation to their biological features. Dig Surg 2003; 20:107-14. [PMID: 12686777 DOI: 10.1159/000069384] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [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] [Received: 02/14/2002] [Accepted: 09/09/2002] [Indexed: 01/20/2023]
Abstract
BACKGROUND/AIM Cyclooxygenase-2 (COX-2) is one of the key isoenzymes in the production of prostaglandins, and is believed to be involved in carcinogenesis. This study was conducted to examine the role of COX-2 in the development and biological behavior of stomach cancer. METHODS Expression of COX-2 at the mRNA and protein levels was analyzed using RT-PCR and immunoblotting assay in 50 cancerous and corresponding non-cancerous tissue specimens. Also, COX-2 expression was detected by an immunohistochemical method in 55 paraffin-embedded gastric adenocarcinoma tissues. RESULTS Of the 50 carcinoma tissue samples analyzed, 38 (76.0%) had overexpression of COX-2 as compared to the paired non-cancerous specimens. The overexpression of COX-2 (91.7%) was more prevalent in tumors with sizes of >5 cm than those (61.5%) of </=5 cm (p < 0.05). COX-2 overexpression was higher in tumors with >6 metastatic nodes compared to those with </=6 metastatic nodes (100.0 vs. 61.3%, p < 0.01). The rate of COX-2 overexpression in non-signet ring cell carcinoma was significantly higher compared with signet ring cell carcinoma (84.1 vs. 16.7%, p < 0.05). The rate of COX-2 overexpression (86.8 or 90.9%) in patients with a cancer invasion depth of pT3 + pT4 or with stage III + IV was significantly higher than that (41.7 or 47.1%) in patients with pT1 + pT2 or with stage I + II (both p < 0.01). Furthermore, consistent with the results at the protein and mRNA levels, immunohistochemical stain indicated that COX-2 protein was overexpressed in 39 of 55 (70.9%) carcinomas, and the 5-year survival rate (25.6%) for patients with COX-2 overexpression seemed better than that (50.0%) of patients without overexpression, though the difference was not significant (p < 0.05). CONCLUSION Our results indicate that COX-2 may play a role in the development of gastric cancer and its overexpression is associated with lymphatic metastasis, tumor invasion and differentiation of gastric carcinoma.
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Affiliation(s)
- S L Han
- Department of General Surgery, Henan Tumor Hospital, Zhengzhou, Henan Province, P.R. China
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Han SL, Abe Y, Miyauchi K, Watanabe Y, Sato N, Kimura S. Therapeutic efficacy of an antineutrophil monoclonal antibody, Urge-8, against acute necrotizing pancreatitis in rats. Surgery 1996; 119:585-91. [PMID: 8619216 DOI: 10.1016/s0039-6060(96)80271-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Although they have critical roles in the defense mechanism against invading microorganisms, neutrophils may facilitate exacerbation of critical conditions associated with acute necrotizing pancreatitis by a discharge of granule contents into the organ tissues. Because of this constitution of neutrophils, the therapeutic efficacy of Urge-8, a mouse monoclonal antibody to neutrophils, on the survival of rats with experimentally induced acute necrotizing pancreatitis was investigated in vivo. METHODS Acute pancreatitis was induced by injection of trypsin mixed with sodium chenodeoxycholic acid into pancreatic ducts. Urge-8 was infused intravenously 30 minutes after pancreatitis was induced, a series of vital signs was taken, and plasma amylase level was estimated. RESULTS Hemorrhagic necrosis of the pancreas and intraabdominal bleeding were observed 1 hour after the pancreatitis-inducing drugs were injected, and death occurred at 240.9 +/- 24.6 minutes (mean +/- SD)in the control group. With Urge-8 administration, however, the survival time was significantly prolonged to 395.2 +/- 64.4 minutes (p = 6.0 x 10-(10) versus control). Failure in the vital signs (mean arterial pressure, heart rate, and body temperature) was significantly ameliorated by injection of Urge-8. The plasma amylase level was elevated after pancreatitis was induced and peaked at 3 hours (4915 +/- 1966 IU/L in mean +/- SD). This level was suppressed during the first 3 hours by injection of Urge-8 (3372 +/- 1223 IU/L); however, the amylase level increased thereafter, becoming comparable with the peak in the control group, and then death occurred. Arterial blood gas and plasma electrolyte analyses showed that pH, base excess, and plasma potassium levels in the group treated with monoclonal antibody were significantly improved. CONCLUSIONS It was suggested that neutrophils play some critical role in the exacerbation of acute necrotizing pancreatitis and its related symptoms. Although not capable of preventing death in our model, treatment with the antineutrophil monoclonal antibody Urge-8 after the onset of acute pancreatitis prolonged the survival time significantly.
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Affiliation(s)
- S L Han
- Second Departemnt of Surgery, Ehime University School of Medicine, Japan
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Han SL, Nagao T, Kita J, Uchida H. Esophageal transection using a biofragmentable anastomosis ring in dogs. Surg Today 1995; 25:802-5. [PMID: 8555698 DOI: 10.1007/bf00311456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Since the first publication on the new anastomosis technique using a biofragmentable anastomosis ring (BAR) by Hardy in 1985, various studies have been performed to investigate the superiority of this type of anastomosis, and it has since been reported that the BAR was safely used not only in large and small bowel anastomosis, but in cholecystojejunal and gastrojejunal anastomosis as well. In this study, the feasibility of the BAR for esophageal transection was investigated. Seven dogs were operated on, and one died of intraabdominal bleeding on the operative day while another died of leakage at the site of gastrotomy on the 3rd postoperative day. These deaths were all considered to be due to simple technical errors not directly related to the use of the BAR. The postoperative recovery of the other five dogs was uneventful, and the ring eventually disintegrated into several small fragments that passed out of the body in the faces between the 14th and 21st postoperative days. The dogs were killed on the 28th postoperative day, and both gross and histological examinations, revealed that the transection had been successful. Neither leakage nor significant stenosis at the site of transection was found. Our results suggested that the BAR could be used for esophageal transection and is thus recommended as an easy-to-learn, time-saving, and safe technique for esophageal operations.
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Affiliation(s)
- S L Han
- Department of Surgery and Transplantation, University of Tokyo, Japan
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Cheng YH, Yu XF, Liu FY, Han SL, Hou YD. [Effects of tilorone on experimental rat silicosis]. Zhongguo Yi Xue Ke Xue Yuan Xue Bao 1983; 5:25-8. [PMID: 6194906] [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: 01/18/2023]
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Scheule RK, Han SL, Van Wart HE, Vallee BL, Scheraga HA. Resonance Raman spectroscopy of arsanilazocarboxypeptidase A: mode of inhibitor binding and active-site topography. Biochemistry 1981; 20:1778-84. [PMID: 7225358 DOI: 10.1021/bi00510a011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The interaction of inhibitors with the active site of arsanilazocarboxypeptidase A has been investigated by means of resonance Raman spectroscopy. The resonance Raman bands of the active-site azotyrosine-248 residue have been shown previously to be sensitive to its state of ionization and its interactions with nearby groups. In particular, the azophenol form of azotyrosine-248 can adopt two different coexisting conformations that differ with respect to the presence or absence of an intramolecular hydrogen bond between the phenolic proton and a nitrogen atom of the azo group. Each of these conformations exhibits characteristic vNN and v phi N azo stretching frequencies. The relative concentrations of these two forms, revealed by resonance Raman spectroscopy, are a sensitive probe of the hydrogen bond accepting ability of the local environment. The present study shows that the binding of L-benzylsuccinate, phenylacetate, L-phenyllactate, and beta-phenylpropionate markedly perturbs the distribution of the intra- and intermolecularly hydrogen-bonded forms of azotyrosine-248 in water. In contrast, glycyl-L-tyrosine and L-phenylalanine leave this distribution unperturbed. These results, taken jointly with other data on inhibitor binding, serve to identify common binding sites for groups of inhibitors and result in plausible suggestions concerning the interactions between azotyrosine-248 and these inhibitors that lead to binding.
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Han SL, Stimson ER, Maxfield FR, Scheraga HA. Spectroscopic study of the conformations of proline-containing oligopeptides in the crystalline state and in solution. Int J Pept Protein Res 1981; 17:297-315. [PMID: 7287301 DOI: 10.1111/j.1399-3011.1981.tb01996.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A conformational study has been carried out on a series of linear proline-containing oligopeptides (ZGP, ZGPL, ZGPLG and ZGPLGP) in both the crystalline state and in DMSO-d6 solution, using Raman and n.m.r. spectroscopy. The amide I and III bands in the Raman spectra of the crystalline forms indicate the presence of the type I beta-bend conformation in ZGPLG and ZGPLGP, but not in ZGP and ZGPL. This result is in agreement with X-ray data on these molecules. The Raman spectra of these peptides in solution indicate that more than one conformation is present, i.e. that the beta-bend structure of the solid form of ZGPLG and ZGPLGP is destabilized by DMSO-d6. 13C and 1H n.m.r. data also demonstrate the presence of more than one conformation in ZGP, ZGPL, ZGPLG and ZGPLGP in DMSO-d6 solution. These isomers differ in their conformation (cis and trans) about their Gly-Pro peptide bonds and possibly about the c alpha-C' bond of the C-terminal proline in ZGPLGP. For ZGP, ZGPL, ZGPLG and ZGPLGP, the ensemble of conformations in DMSO-d6 includes C5 and C7 hydrogen-bonded rings; in addition, ZGPLGP may contain a small percentage of a beta-bend conformation (at Pro2-Leu3) with trans peptides in both Gly-Pro moieties.
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Han SL, Stimson ER, Maxfield FR, Scheraga HA. Conformational study of [Leu5]-enkephalin by laser Raman spectroscopy. Int J Pept Protein Res 1980; 16:173-81. [PMID: 7461899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The Raman spectrum of [Leu5]-enkephalin in the solid state indicates the presence of a type I' beta bend, in agreement with X-ray data of Smith & Griffin (1978). In solution, this molecule takes on different conformations in different solvents. In DMSO-d6, it forms a beta-bend structure whereas in water it exists as an ensemble of conformations.
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Han SL, Stimson ER, Maxfield FR, Leach SJ, Scheraga HA. Study of the state of ionization of [Leu5]-enkephalin in the crystal and in solution. Int J Pept Protein Res 1980; 16:183-90. [PMID: 7461900 DOI: 10.1111/j.1399-3011.1980.tb02951.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The state of ionization of [Leu5]-enkephalin in the crystal and in solution was studied with the aid of Raman, i.r., and n.m.r. techniques. The results indicate that, in the crystal, enkephalin adopts the dipolar ion form. In water near neutral pH, enkephalin also exists in the dipolar ion form whereas in DMSO-d6 it is a mixture of the dipolar ion and uncharged species. The pK's of alpha-amino and alpha-carboxyl groups are probably closer to each other in DMSO than in H2O.
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Abstract
Laser Raman spectroscopy has been used to study the conformations of somatostatin and some selected analogues in aqueous solution. The results indicate that the CS-SC dihedral angles of somatostatin and of these analogues (except [Ala3,14]-SS, which has no disulfide bond) are within 20 degrees of +/- 85 degrees, and the SS-CC dihedral angles are predominantly in the range of 50 degrees-180 degrees. Furthermore, from the behavior of the amide I' and amide III bands, it appears that somatostatin adopts a beta-pleated sheet structure, whereas its analogues are less ordered (to varying degrees).
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