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Chen SF, Yang BY, Zhang TY, Song XY, Jia ZB, Chen LJ, Cui MY, Xu WJ, Peng J. Study on the preservation effects of the amputated forelimb by machine perfusion at physiological temperature. Chin J Traumatol 2024; 27:114-120. [PMID: 37311687 PMCID: PMC11075101 DOI: 10.1016/j.cjtee.2023.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/31/2023] [Accepted: 05/02/2023] [Indexed: 06/15/2023] Open
Abstract
PURPOSE Ischemia and hypoxia are the main factors limiting limb replantation and transplantation. Static cold storage (SCS), a common preservation method for tissues and organs, can only prolong limb ischemia time to 4 - 6 h. The normothermic machine perfusion (NMP) is a promising method for the preservation of tissues and organs, which can extend the preservation time in vitro by providing continuous oxygen and nutrients. This study aimed to evaluate the difference in the efficacy of the 2 limb preservation methods. METHODS The 6 forelimbs from beagle dogs were divided into 2 groups. In the SCS group (n = 3), the limbs were preserved in a sterile refrigerator at 4 °C for 24 h, and in the NMP group (n = 3), the perfusate prepared with autologous blood was used for the oxygenated machine perfusion at physiological temperature for 24 h, and the solution was changed every 6 h. The effects of limb storage were evaluated by weight gain, perfusate biochemical analysis, enzyme-linked immunosorbent assay, and histological analysis. All statistical analyses and graphs were performed using GraphPad Prism 9.0 one-way or two-way analysis of variance. The p value of less than 0.05 was considered to indicate statistical significance. RESULTS In the NMP group, the weight gained percentage was 11.72% ± 4.06%; the hypoxia-inducible factor-1α contents showed no significant changes; the shape of muscle fibers was normal; the gap between muscle fibers slightly increased, showing the intercellular distance of (30.19 ± 2.83) μm; and the vascular α-smooth muscle actin (α-SMA) contents were lower than those in the normal blood vessels. The creatine kinase level in the perfusate of the NMP group increased from the beginning of perfusion, decreased after each perfusate change, and remained stable at the end of perfusion showing a peak level of 4097.6 U/L. The lactate dehydrogenase level of the NMP group increased near the end of perfusion and reached the peak level of 374.4 U/L. In the SCS group, the percentage of weight gain was 0.18% ± 0.10%, and the contents of hypoxia-inducible factor-1α increased gradually and reached the maximum level of (164.85 ± 20.75) pg/mL at the end of the experiment. The muscle fibers lost their normal shape and the gap between muscle fibers increased, showing an intercellular distance of (41.66 ± 5.38) μm. The contents of vascular α-SMA were much lower in the SCS group as compared to normal blood vessels. CONCLUSIONS NMP caused lesser muscle damage and contained more vascular α-SMA as compared to SCS. This study demonstrated that NMP of the amputated limb with perfusate solution based on autologous blood could maintain the physiological activities of the limb for at least 24 h.
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Affiliation(s)
| | - Bo-Yao Yang
- Medical School of PLA, Beijing, 100048, China
| | - Tie-Yuan Zhang
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China
| | - Xiang-Yu Song
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China; Hebei North University, Zhangjiakou, 075000, Hebei Province, China
| | - Zhi-Bo Jia
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China; Hebei North University, Zhangjiakou, 075000, Hebei Province, China
| | - Lei-Jia Chen
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China; Hebei North University, Zhangjiakou, 075000, Hebei Province, China
| | - Meng-Yi Cui
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China
| | - Wen-Jing Xu
- Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China
| | - Jiang Peng
- Guizhou Medical University, Guiyang, 550025, China; Beijing Key Lab of Regenerative Medicine in Orthopedics, Key Laboratory of Musculoskeletal Trauma and War Injuries PLA, Department of Orthopedics, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, 100048, China.
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Dai HP, Shen HJ, Li Z, Cui W, Cui QY, Li MY, Chen SF, Zhu MQ, Wu DP, Tang XW. [Efficacy and safety of chimeric antigen receptor T-cell therapy followed by allogeneic hematopoietic stem cell transplantation in 21 patients with Ph-like acute lymphoblastic leukemia]. Zhonghua Xue Ye Xue Za Zhi 2024; 45:35-40. [PMID: 38527836 DOI: 10.3760/cma.j.cn121090-20230929-00154] [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: 03/27/2024]
Abstract
Objective: To evaluate the efficacy and safety of chimeric antigen receptor T-cell (CAR-T) therapy followed by allogeneic hematopoietic stem cell transplantation (allo-HSCT) in patients with Ph-like acute lymphoblastic leukemia (Ph-ALL) . Methods: Patients with Ph-ALL who underwent CAR-T therapy followed by allo-HSCT from March 2018 to August 2023 at the First Affiliated Hospital of Soochow University were included, and their clinical data were retrospectively analyzed. Results: Of the 21 patients, 14 were male and 7 were female. The median age at the time of CAR-T therapy was 22 (6-50) years. Seven patients had ABL1-like rearrangements, and 14 had JAK-STAT rearrangements. Prior to CAR-T therapy, 12 patients experienced hematologic relapse; 7 were multiparameter flow cytometry minimal residual disease (MFC-MRD) -positive and 2 were MFC-MRD-negative. CAR-T cells were derived from patients' autologous lymphocytes. Nine patients were treated with CD19 CAR-T cells, and 12 were treated with CD19/CD22 CAR-T cells. After assessment on day 28 after CAR-T therapy, 95.2% of the patients achieved complete remission, with an MRD-negative remission rate of 75%. Nineteen patients developed grade 0-2 cytokine release syndrome (CRS) and 2 patients suffered grade 3 CRS, all cases of which resolved after treatment. All patients underwent allo-HSCT after CAR-T therapy. The median time from CAR-T therapy to allo-HSCT was 63 (38-114) days. Five patients experienced relapse after CAR-T therapy, including four with hematologic relapse and one with molecular relapse. The 3-year overall survival (OS) rates in the ABL1 and JAK-STAT groups were (83.3±15.2) % and (66.6±17.2) %, respectively (P=0.68) . The 3-year relapse-free survival (RFS) rates were (50.0±20.4) % and (55.6±15.4) % in the ABL1 and JAK-STAT groups, respectively. There was no significant difference in 3-year OS or RFS between the two groups. Conclusions: CAR-T therapy followed by allo-HSCT leads to rapid remission in most patients with Ph-ALL and prolongs leukemia-free survival.
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Affiliation(s)
- H P Dai
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - H J Shen
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - Z Li
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - W Cui
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - Q Y Cui
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - M Y Li
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - S F Chen
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - M Q Zhu
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - D P Wu
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
| | - X W Tang
- The First Affiliated Hospital of Soochow University; National Clinical Research Center for Hematologic Diseases; Jiangsu Institute of Hematology; Collaborative Innovation Center of Hematology; Institute of Blood and Marrow Transplantation, Soochow University, Suzhou 215006, China
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Gu Q, Chen SF, Chen KL, Huang YY, Ge JJ, Zuo CT, Cui M, Dong Q, Yu JT. [The clinical application value of brain 18F-FDG PET/CT in the diagnostics of Parkinsonian syndromes]. Zhonghua Yi Xue Za Zhi 2023; 103:3294-3300. [PMID: 37926574 DOI: 10.3760/cma.j.cn112137-20230707-01181] [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: 11/07/2023]
Abstract
Objective: To analyze the PET/CT imaging features of fluoride 18F-fluorodeoxyglucose (18F-FDG) in patients with various types of Parkinson's syndrome (PS), and to establish a "diagnostic tree" model of 18F-FDG PET/CT for PS. Methods: Data of patients with Parkinson's disease (PD), patients with multiple system atrophy cerebellar type (MSA-C), and patients with multiple system atrophy Parkinson's type (MSA-P)admitted to the Neurology Department of Huashan Hospital affiliated to Fudan University from January 2019 to December 2021. 18F-FDG PET/CT examination was conducted in all patients. Clinical and follow-up data was collected to determine clinical diagnosis. The specific patterns of brain glucose metabolism in patients with various types of Parkinsonism were observed and their utility in the differential diagnosis of the disease was analyzed. 18F-FDG PET/CT imaging"diagnostic tree"model was established and its value in the differential diagnosis of Parkinsonism was verified. Results: A total of 320 patients, 187 males and 133 females, aged (62±9) years, were enrolled in our study, including 80 PD, 90 PSP, 114 MSA-C and 36 MSA-P patients. The differential diagnostic features of cerebral glucose metabolism of Parkinsonism were as follows: the metabolism of putamen increased in PD patients, the metabolism of caudate nucleus, thalamus, midbrain, and frontal lobe decreased in PSP patients, the metabolism of cerebellum decreased in MSA-C patients, and the metabolism of putamen and cerebellum decreased in MSA-P patients. The sensitivity and specificity of the"diagnostic tree"model are 88.75% and 91.25% for PD diagnosis, 54.44% and 96.96% for PSP diagnosis, 87.72% and 86.41% for MSA-C diagnosis, and 55.56% and 91.55% for MSA-P diagnosis, respectively. It could correctly classify 75%(240/320) of patients. Conclusions: Characteristic metabolism patterns of brain in 18F-FDG PET/CT imaging is significant for the differential diagnosis of PD, PSP, MSA-C and MSA-P. The"diagnostic tree"model is valuable for clinical diagnosis.
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Affiliation(s)
- Q Gu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - S F Chen
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - K L Chen
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Y Y Huang
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - J J Ge
- Positron Emission Tomography Center, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - C T Zuo
- Positron Emission Tomography Center, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - M Cui
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Q Dong
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - J T Yu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
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Shi ZJ, Zhang H, Jiang DH, Chen SF, Zhou LW, Tan GW, Wang ZX. [Role of personalized 3D printing in brain protection after decompressive craniectomy]. Zhonghua Yi Xue Za Zhi 2022; 102:1766-1770. [PMID: 35705481 DOI: 10.3760/cma.j.cn112137-20211019-02314] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To explore the application value of personalized three-dimensional (3D) printed protective cap in brain protection after decompressive craniectomy (DC). Methods: Fourty-five patients who underwent DC from January 2021 to October 2021 were selected, including 26 males and 19 females, aged 5-73 (50±13) years old. The brain CT data were imported into 3D Slicer software to rebuild the protective cap through 3D printing. The cap was worn on the head of the patient, thereby preventing secondary braindamage. The follow-up results were compared with 53 patients without protective capduring the same period. Results: There were no statistically significant differences in age, skull defect location and follow-up time between the two groups (all P>0.05).Among 45 patients, 47 brain protective caps (2 cases with bilateral skull defects) were successfully designed. The time for image post-processingand 3D printing was (21.2±6.0) min and (62.4±8.3) min, respectively. There were 6 cases of low compliance, 9 cases of moderate compliance, 32 cases of high compliance, respectively. Six cases with low conformity were redesigned and printed, 2 of 9 cases with moderate conformity were redesigned and printed, and the remaining 7 cases reached high compliance after grinding and packaging. In the current study, 45 patients with brain protective caps were followed up for 3 months, and no secondary brain injury occurred. However, among 53 patients without brain protective caps during the same period, 4 patients had secondary accidental brain compression. The incidence of injury was 7.5 %, and the difference was statistically significant (P<0.001). Conclusion: Brain protective cap designed based on cranial CT and 3D printing can be used in patients with skull defects to protect the brain tissue from secondary crush damage and has certain clinical value.
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Affiliation(s)
- Z J Shi
- Department of Neurosurgery, the First Affiliated Hospital of Xiamen University, Xiamen 361000, China
| | - H Zhang
- Department of Neurosurgery, Xuzhou Central Hospital, Xuzhou 221000, China
| | - D H Jiang
- Department of Neurosurgery, Xuzhou Central Hospital, Xuzhou 221000, China
| | - S F Chen
- Department of Neurosurgery, the First Affiliated Hospital of Xiamen University, Xiamen 361000, China
| | - L W Zhou
- Department of Neurosurgery, the First Affiliated Hospital of Xiamen University, Xiamen 361000, China
| | - G W Tan
- Department of Neurosurgery, the First Affiliated Hospital of Xiamen University, Xiamen 361000, China
| | - Z X Wang
- Department of Neurosurgery, the First Affiliated Hospital of Xiamen University, Xiamen 361000, China
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Li JX, Li Y, Liu FC, Chen JC, Cao J, Chen SF, Hu DS, Shen C, Huang JF, Lu XF, Gu DF. [Cardiovascular disease risk in diabetes patients aged 40 years old and above in China]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:968-974. [PMID: 33210870 DOI: 10.3760/cma.j.cn112148-20191203-00733] [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: 06/11/2023]
Abstract
Objective: To evaluate the incidence of cardiovascular disease (CVD), ischemic and hemorrhagic cardiovascular events among Chinese diabetic patients aged 40 years and above with different CVD risk levels. Methods: This study enrolled participants aged 40 years and above in 15 provinces from a prospective cohort study, the China-PAR project (Prediction for Atherosclerotic Cardiovascular Disease Risk in China). Participants were categorized into two groups according to the presence or absence of diabetes at baseline. Individuals were further classified into low (0-4.9%), moderate (5%-9.9%) and high risk groups (≥10%), based on predicted ten-year CVD risk using the China-PAR equations. Two followed-up surveys were conducted between 2007 and 2015 to identify CVD events, which were defined as nonfatal acute myocardial infarction, or death due to coronary heart disease, or stroke. Ischemic cardiovascular events included nonfatal acute myocardial infarction, or death due to coronary heart disease, or ischemic stroke. Hemorrhagic cardiovascular events included subarachnoid hemorrhage and intracerebral hemorrhage. The incidences of CVD, ischemic and hemorrhagic cardiovascular events were compared in diabetes and non-diabetes population with different CVD risk levels. Results: This study included 89 209 participants aged 40 years and above, the average follow-up period was 8.5 years. The age was (54.8±9.4) years, and 36 794 (41.2%) were men, and 5 730 (6.4%) were diabetic patients. In diabetes patients aged 40 years and above, 53.7% (3 075/5 730) were at high risk of CVD. Age-and sex-adjusted incidence of CVD, ischemic and hemorrhagic cardiovascular events (1 066.93/100 000 person-years, 824.23/100 000 person-years, and 211.56/100 000 person-years) were significantly lower in diabetes patients than those in non-diabetes population with high CVD risk (1 773.73/100 000 person-years, 1 228.18/100 000 person-years, and 446.49/100 000 person-years) (all P<0.001). Among high CVD risk populations, incidence of ischemic events was significantly higher in diabetic patients than in non-diabetes population (1 638.47/100 000 person-years vs. 1 228.18/100 000 person-years, P<0.001), but incidence of hemorrhagic events tended to be lower in diabetic patients than in non-diabetes population (415.70/100 000 person-years vs. 446.49/100 000 person-years, P=0.635). Incidence of ischemic and hemorrhagic events were similar between diabetes patients and non-diabetes population at low or moderate CVD risk groups (all P>0.05). Conclusions: More than half of diabetes patients aged 40 years and above in China have high CVD risk. The incidence of CVD, ischemic and hemorrhagic cardiovascular events are different in diabetic patients with different CVD risk levels.
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Affiliation(s)
- J X Li
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Y Li
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - F C Liu
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - J C Chen
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - J Cao
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S F Chen
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - D S Hu
- School of Public Health, Shenzhen University, Shenzhen 518060, China
| | - C Shen
- School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - J F Huang
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - X F Lu
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - D F Gu
- Key Laboratory of Cardiovascular Epidemiology & Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
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Abstract
Calonectria represents a genus of phytopathogenic ascomycetous fungi with a worldwide distribution. In recent years, there has been an increase in the number of taxonomic studies on these fungi. Currently, there are 169 described species of Calonectria based on comparisons of DNA sequence data, combined with morphological characteristics. However, for some of these species, the sequence data utilised at the time of their description were relatively limited. This has justified an urgent need to reconsider the species boundaries for Calonectria based on robust genus-wide phylogenetic analyses. In this study, we utilised 240 available isolates including the ex-types of 128 Calonectria species, and re-sequenced eight gene regions (act, cmdA, his3, ITS, LSU, rpb2, tef1 and tub2) for them. Sequences for 44 Calonectria species, for which cultures could not be obtained, were downloaded from GenBank. DNA sequence data of all the 169 Calonectria species were then used to determine their phylogenetic relationships. As a consequence, 51 species were reduced to synonymy, two new species were identified, and the name Ca. lauri was validated. This resulted in the acceptance of 120 clearly defined Calonectria spp. The overall data revealed that the genus includes 11 species complexes, distributed across the Prolate and Sphaero-Naviculate Groups known to divide Calonectria. The results also made it possible to develop a robust set of DNA barcodes for Calonectria spp. To accomplish this goal, we evaluated the outcomes of each of the eight candidate DNA barcodes for the genus, as well as for each of the 11 species complexes. No single gene region provided a clear identity for all Calonectria species. Sequences of the tef1 and tub2 genes were the most reliable markers; those for the cmdA, his3, rpb2 and act gene regions also provided a relatively effective resolution for Calonectria spp., while the ITS and LSU failed to produce useful barcodes for species discrimination. At the species complex level, results showed that the most informative barcodes were inconsistent, but that a combination of six candidate barcodes (tef1, tub2, cmdA, his3, rpb2 and act) provided stable and reliable resolution for all 11 species complexes. A six-gene combined phylogeny resolved all 120 Calonectria species, and revealed that tef1, tub2, cmdA, his3, rpb2 and act gene regions are effective DNA barcodes for Calonectria.
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Affiliation(s)
- Q L Liu
- China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), ZhanJiang, 524022, GuangDong Province, China.,State Key Laboratory of Tree Genetics and Breeding (SKLTGB), Chinese Academy of Forestry (CAF), Haidian District, 100091, Beijing, China.,Department of Biochemistry, Genetics and Microbiology (BGM), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0028, South Africa
| | - J Q Li
- China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), ZhanJiang, 524022, GuangDong Province, China.,State Key Laboratory of Tree Genetics and Breeding (SKLTGB), Chinese Academy of Forestry (CAF), Haidian District, 100091, Beijing, China.,Department of Biochemistry, Genetics and Microbiology (BGM), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0028, South Africa
| | - M J Wingfield
- Department of Biochemistry, Genetics and Microbiology (BGM), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0028, South Africa
| | - T A Duong
- Department of Biochemistry, Genetics and Microbiology (BGM), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0028, South Africa
| | - B D Wingfield
- Department of Biochemistry, Genetics and Microbiology (BGM), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0028, South Africa
| | - P W Crous
- Department of Biochemistry, Genetics and Microbiology (BGM), Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, 0028, South Africa.,Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584, CT Utrecht, the Netherlands
| | - S F Chen
- China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), ZhanJiang, 524022, GuangDong Province, China.,State Key Laboratory of Tree Genetics and Breeding (SKLTGB), Chinese Academy of Forestry (CAF), Haidian District, 100091, Beijing, China
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Huang LH, Chen CM, Chen SF, Wang HH. Roles of nurses and National Nurses Associations in combating COVID-19: Taiwan experience. Int Nurs Rev 2020; 67:318-322. [PMID: 32761608 PMCID: PMC7436573 DOI: 10.1111/inr.12609] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/12/2020] [Accepted: 06/16/2020] [Indexed: 12/01/2022]
Abstract
As the COVID‐19 pandemic continues to expand worldwide, Taiwan has effectively contained the spread domestically and protected its citizens after registering its first case relatively early on 21 January 2020. Proactive preparedness and deployment by the national government, timely evidence and experience‐based judgements and decision‐making, information transparency, rapid response, and effective communication and measures have all been critical to combating COVID‐19 in Taiwan. Nurses play a pivotal role in providing direct health care as well as providing contact tracing and care for the quarantined clients and community care services. The Taiwan Nurses Association and other nurses’ associations serve a vital leadership role in advocating for nurses, raising public awareness, enhancing nursing’s professional profile, and sharing experiences via national and international platforms. The implications for nursing and health policy are that we need to well prepare for any unpredicted emerging pandemic in the future. Providing adequate personal protective equipment and safe staffing should be the highest priority for the governments and policymakers around the world to combat pandemic successfully.
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Affiliation(s)
- L H Huang
- Taiwan Nurses Association, International Council of Nurses, School of Nursing, China Medical University, Taichung, Taiwan
| | - C M Chen
- Taiwan Nurses Association, Department of Nursing, College of Medicine, National Cheng-Kung University, Tainan, Taiwan
| | - S F Chen
- Taiwan Nurses Association, Taipei, Taiwan
| | - H H Wang
- Taiwan Nurses Association, College of Nursing, Kaohsiung Medical University, Kaohsiung, Taiwan
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Huang CY, Li JX, Chen SF, Chen JC, Lu Y, Huang QL, Wang LC, Hua YJ, Hu YH. [Years of potential life lost due to premature death of cardiovascular diseases among residents in Suzhou from 1987 to 2017]. Zhonghua Yu Fang Yi Xue Za Zhi 2020; 54:104-107. [PMID: 31914577 DOI: 10.3760/cma.j.issn.0253-9624.2020.01.019] [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
From 1987 to 2017, cardiovascular disease (CVD) had been ranking the first cause of death in Suzhou, and the mortality rate showed an upward trend annual percentage changes (APC=0.62%, P=0.001), while the standardized mortality rate showed a downward trend (APC=-2.65%, P<0.001). The probability of premature death of CVD declined consistently from 7.06% in 1987 to 2.00% in 2017 (APC=-4.45%, P<0.001). When the life expectancy was set at 70, the potential years of life lost rate (PYLLR) decreased from 6.35‰ in 1987 to 3.30‰ in 2017, and the standardized PYLLR decreased from 7.30‰ to 2.68‰. When the life expectancy was set at 75, the PYLLR decreased from 10.12‰ to 5.19‰, and the standardized PYLLR decreased from 11.44‰ to 3.88‰. With the increase of years, all PYLLR and standardized PYLLR showed a significantly downward trend (APC=-2.51%--3.89%, P<0.001).
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Affiliation(s)
- C Y Huang
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - J X Li
- Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases/ Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S F Chen
- Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases/ Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - J C Chen
- Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases/ Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Y Lu
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - Q L Huang
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - L C Wang
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - Y J Hua
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - Y H Hu
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
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Zhang Y, Wang HF, Ning YS, Yang G, Zhang YQ, Shan LL, Chen SF, Wang J, Tao YC, Zhang HY. [The mediating role of psychological resilience to childhood abuse and binge eating among middle school students]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 53:944-946. [PMID: 31474079 DOI: 10.3760/cma.j.issn.0253-9624.2019.09.015] [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
To explore the mediating role of psychological resilience to childhood abuse and binge eating. This study assessed the childhood abuse, binge eating and psychological resilience of 3 453 middle school students in Harbin city, Heilongjiang Province. SPSS PROCESS macro program, combined with Bootstrap method, was employed to explore the mediating effect of psychological resilience. The incidence of middle school students experiencing at least one type of abuse in their childhood was 81.3% (2 807/3 453). Childhood abuse, psychological resilience and binge eating were all significantly different in terms of gender, household registration and whether they were only child (all P values<0.05). There was a significant positive correlation between childhood abuse and binge eating. Psychological resilience was negatively associated with childhood abuse and binge eating. Childhood abuse could not only directly predict the binge eating behavior of adolescents, but also could indirectly affect it via psychological resilience.
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Affiliation(s)
- Y Zhang
- Department of Maternal, Child & Adolescent Health, School of Public Health, Harbin Medical University, Harbin 150081, China
| | - H F Wang
- Harbin School Health Care Center, Harbin 150081, China
| | - Y S Ning
- The Seventh Middle School in Acheng District, Harbin 150300, China
| | - G Yang
- Kanghui School in Acheng District, Harbin 150300, China
| | - Y Q Zhang
- Department of Maternal, Child & Adolescent Health, School of Public Health, Harbin Medical University, Harbin 150081, China
| | - L L Shan
- Department of Maternal, Child & Adolescent Health, School of Public Health, Harbin Medical University, Harbin 150081, China
| | - S F Chen
- Department of Maternal, Child & Adolescent Health, School of Public Health, Harbin Medical University, Harbin 150081, China
| | - J Wang
- Department of Maternal, Child & Adolescent Health, School of Public Health, Harbin Medical University, Harbin 150081, China
| | - Y C Tao
- Department of Maternal, Child & Adolescent Health, School of Public Health, Harbin Medical University, Harbin 150081, China
| | - H Y Zhang
- Department of Maternal, Child & Adolescent Health, School of Public Health, Harbin Medical University, Harbin 150081, China
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Zhan XS, El-Ashram S, Luo DZ, Luo HN, Wang BY, Chen SF, Bai YS, Chen ZS, Liu CY, Ji HQ. A Comparative Study of Biological Characteristics and Transcriptome Profiles of Mesenchymal Stem Cells from Different Canine Tissues. Int J Mol Sci 2019; 20:ijms20061485. [PMID: 30934541 PMCID: PMC6471769 DOI: 10.3390/ijms20061485] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2019] [Revised: 03/18/2019] [Accepted: 03/21/2019] [Indexed: 12/11/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are the most promising seed cells for cell therapy. Comparing the biological and transcriptome gene characteristics of MSCs from different sources provides an important basis for the screening of clinically used cells. The main purpose of this experiment was to establish methods for the isolation and culture of MSCs from five different canine sources, including adipose tissue, bone marrow, umbilical cord, amniotic membrane, and placenta, and compare biological and transcriptome characteristics of MSCs, in order to provide a basis for the clinical application of canine MSCs. MSCs were isolated from Chinese pastoral dogs, and the following experiments were performed: (1) the third, sixth, and ninth generations of cells were counted, respectively, and a growth curve was plotted to calculate the MSC population doubling time; (2) the expression of CD34 and CD44 surface markers was studied by immunofluorescence; (3) the third generation of cells were used for osteogenetic and adipogenic differentiation experiments; and (4) MSC transcriptome profiles were performed using RNA sequencing. All of the five types of MSCs showed fibroblast-like adherent growth. The cell surface expressed CD44 instead of CD34; the third-generation MSCs had the highest proliferative activity. The average population doubling time of adipose mesenchymal stem cells (AD-MSCs), placenta mesenchymal stem cells (P-MSCs), bone marrow mesenchymal stem cells (BM-MSCs), umbilical cord mesenchymal stem cells (UC-MSCs), and amniotic mesenchymal stem cells (AM-MSCs) were 15.8 h, 21.2 h, 26.2 h, 35 h, and 41.9 h, respectively. All five types of MSCs could be induced to differentiate into adipocytes and osteoblasts in vitro, with lipid droplets appearing after 8 days and bone formation occurring 5 days after AD-MSC induction. However, the multilineage differentiation for the remaining of MSCs was longer compared to that of the AD-MSCs. The MSC transcriptome profiles showed that AD-MSC and BM-MSCs had the highest homology, while P-MSCs were significantly different compared to the other four types of MSCs. All the isolated MSCs had the main biological characteristics of MSCs. AD-MSCs had the shortest time for proliferation, adipogenesis, and osteogenic differentiation.
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Affiliation(s)
- Xiao-Shu Zhan
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Saeed El-Ashram
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
- Faculty of Science, Kafrelsheikh University, Kafr el-Sheikh 33516, Egypt.
| | - Dong-Zhang Luo
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Hui-Na Luo
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Bing-Yun Wang
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Sheng-Feng Chen
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Yin-Shan Bai
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Zhi-Sheng Chen
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Can-Ying Liu
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
| | - Hui-Qin Ji
- School of Life Science and Engineering, Foshan University, Foshan 528231, China.
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Chen SF, Wang TZ, Jiang SH, Shen HJ, Xu Y, Zhou HF, Wu DP. [Clinical features and curative effect analysis of patients with myeloid neoplasms and RUNX1 mutations]. Zhonghua Xue Ye Xue Za Zhi 2019; 39:983-988. [PMID: 30612398 PMCID: PMC7348223 DOI: 10.3760/cma.j.issn.0253-2727.2018.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
目的 研究伴RUNX1突变髓系肿瘤的临床特征和异基因造血干细胞移植(allo-HSCT)的疗效。 方法 回顾性分析2014年7月至2018年4月在苏州大学附属第一医院行二代测序检出RUNX1基因突变的42例髓系肿瘤患者的临床资料。 结果 全部42例伴RUNX1突变髓系肿瘤患者中,男27例,女15例,中位年龄43.5(16~68)岁,急性髓系白血病(AML)30例,骨髓增生异常综合征(MDS)12例。共突变基因中频率最高的是FLT3(26.2%,11/42),携带FLT3共突变基因的均为AML患者(P=0.014)。而MDS患者中最常见的共突变为ASXL1(25%,3/12)。allo-HSCT组(31例)1年总生存(OS)、无病生存(DFS)率分别为(70.6±9.0)%、(61.0±9.4)%,化疗组(11例)1年OS、DFS率分别为(34.4±16.7)%、(22.4±15.3)%,两组OS、DFS率差异有统计学意义(χ2=4.843,P=0.036;χ2=4.320,P=0.047)。单因素分析提示移植年龄>45岁为影响患者OS及DFS的预后不良因素[HR=4.819(95%CI 1.145~20.283),P=0.032;HR=5.945(95%CI 1.715~20.604),P=0.005],染色体核型复杂异常为影响OS的预后不良因素[HR=5.572(95%CI 1.104~28.113),P=0.038]。 结论 allo-HSCT可以改善伴RUNX1突变髓系肿瘤患者预后,移植年龄>45岁、染色体核型复杂异常是影响allo-HSCT疗效的不良预后因素。
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Affiliation(s)
- S F Chen
- First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis under Ministry of Health, Suzhou 215006, China
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Jiang SH, Hou C, Chen N, Chen SF, Qiu HY, Xu Y, Chen SN, Wu DP. [Prognostic analysis of allogeneic hematopoietic stem-cell transplantation in 47 patients with acute myeloid leukemia and MLL rearrangement]. Zhonghua Xue Ye Xue Za Zhi 2019; 39:558-562. [PMID: 30122014 PMCID: PMC7342217 DOI: 10.3760/cma.j.issn.0253-2727.2018.07.006] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
目的 研究混合谱系白血病(MLL)基因重排阳性急性髓系白血病(AML)患者行异基因造血干细胞移植(allo-HSCT)的预后特点。 方法 回顾性分析2009年9月至2016年5月于苏州大学附属第一医院行allo-HSCT的47例MLL基因重排阳性AML患者的临床资料。 结果 全部47例MLL重排阳性AML患者中男24例,女23例,中位年龄30(15~58)岁,M4/M5共36例(76.6%)。移植后2年总生存(OS)率为(64.4±8.4)%,无病生存(DFS)率为(47.3±9.3)%,复发率为41.0%,移植相关死亡率为17.9%。45例患者检出11q23易位,2例染色体核型正常患者检出MLL部分串联重复。t(6;11)组(16例)、t(9;11)组(15例)、其他类型组(16例)的2年OS率差异无统计学意义(χ2=1.509,P=0.472)。多因素分析显示,移植时年龄>45岁是影响OS的独立危险因素[HR=4.454(95%CI 1.314~15.099),P=0.016],移植前MRD阳性是影响患者DFS[HR=4.236(95%CI 1.238~14.495),P=0.021]、复发[HR=5.491(95% CI 1.371~21.995),P=0.016]的独立不良预后因素,移植前疾病处于非CR状态患者移植相关死亡风险增高[HR=10.370(95%CI 1.043~103.110),P=0.046]。 结论 移植时年龄>45岁、移植前疾病处于非CR状态、移植前MRD阳性为影响allo-HSCT治疗MLL基因重排阳性AML患者预后的危险因素。
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Affiliation(s)
- S H Jiang
- First Affiliated Hospital of Soochow University, Jiangsu Institute of Hematology, Key Laboratory of Thrombosis and Hemostasis of Ministry of Health, Collaborative Innovation Center of Hematology, Institute of Hematopoietic Stem Cell Transplantation, Soochow University, Suzhou 215006, China
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Wang NF, Yang Y, Chen SF. [Progress of liquid biopsy technique and clinical application in lung cancer]. Zhonghua Jie He He Hu Xi Za Zhi 2018; 41:881-883. [PMID: 30423633 DOI: 10.3760/cma.j.issn.1001-0939.2018.11.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Zhu MW, Wei JM, Chen W, Yang X, Cui HY, Zhu SN, Zhang PP, Xiong J, Zheng DF, Song HJ, Liang XY, Zhang L, Xu WY, Wang HB, Su GQ, Feng LJ, Chen T, Wu YD, Li H, Sun JQ, Shi Y, Tong BD, Zhou SM, Wang XY, Huang YH, Zhang BM, Xu J, Zhang HY, Chang GL, Jia ZY, Chen SF, Hu J, Zhang XW, Wang H, Li ZD, Gao YY, Gui B. [Dynamic investigation of nutritional risk in patients with malignant tumor during hospitalization]. Zhonghua Yi Xue Za Zhi 2018; 98:1093-1098. [PMID: 29690722 DOI: 10.3760/cma.j.issn.0376-2491.2018.14.009] [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 prospectively investigate the changes in nutritional status of patients with malignant tumors during hospitalization by using nutritional risk screening (NRS2002), and to analyze the correlation between the nutritional status and clinical outcomes . Methods: This was a prospective and parallel research done by multi-center collaboration from 34 hospitals in China from June to September 2014.Hospitalized patients with malignant tumors inthese departments (Department of Gastroenterology, respiratory medicine, oncology, general surgery, thoracic surgery and geriatrics)were investigated. Only the patients with age≥ 18 years and hospitalization time between 7-30 days were included. During hospitalization, the physical indexes of human bodywere measured, and the NRS 2002 scores, and monitored the nutritional support at the time points of admission and 24 hours before discharge were recorded.And whether there was a nutritional risk in hospitalized patients and its association with clinical outcomes were investigated. Results: A total of 2 402 patients with malignancies were enrolled in this study. Seventy fourpatients who did not complete NRS2002 were eliminated, and 2 328 patients were included. The number of the main diseases was the top five, including 587 cases of colorectal cancer, 567 cases of lung cancer, 564 cases of gastric cancer, 146 cases of esophageal cancer, and 119 cases of liver tumor. At the time of discharge, compared with admission, the BMI, body weight, grip and calf circumferences of patients with malignant tumor were significantly decreased (P<0.05). The total protein, albumin, prealbumin and hemoglobin were significantly lower than those at admission (P<0.05). In 2 328 patients who were completed nutritional risk screening, the rate of malnutrition at admission was 11.1% (BMI =18.5, 258/2 328) and the rate of malnutrition at discharge was 10.9% (BMI =18.5, 254/2 328), there were no significant differences (χ(2)=0.019 7, P=0.888). There were 1 204 patients with nutritional risk at admission (51.7%, NRS2002 score≥3)and 1 352 patients with nutritional risk at discharge (58.1%, NRS2002 score≥3), with significant differences (χ(2)=49.9, P<0.001). The incidence of nutritional risk in patients with colorectal, stomach, and lung tumors at discharge was significantly higher than that at admission (P<0.05). The infective complications and other complications of patients with nutritional risk were significantly greater than those without nutritional risk at admission and at discharge.ICU hospitalization stay of patients with nutritional risk was increased significantly than those without nutritional risk at admission(P=0.042). Hospitalization expenses of patients with nutritional risk was increased significantly than those of patients without nutritional risk at discharge(P<0.01). Conclusion: The patients with malignant tumor have a higher incidence rate of malnutrition at both admission and discharge and malnutritionhas correlation with adverse clinical outcomes.The aboveindicators did not improve significantly at discharge.Doctors should pay more attention to the nutritional status (screening and evaluation)of patients before discharge and use appropriate and adequate nutrition support in order to prevent the weight loss and improve the life quality of patients.
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Affiliation(s)
- M W Zhu
- Department of General Surgery, Beijing Hospital, Beijing 100730, China
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Chen YG, Chen SF, Yang YJ, Long AA, Liu XQ. [Expression and significance of miR-210 in the epididymis in rats with varicocele and following varicocelectomy]. Zhonghua Yi Xue Za Zhi 2016; 96:2885-2888. [PMID: 27760632 DOI: 10.3760/cma.j.issn.0376-2491.2016.36.008] [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: 11/05/2022]
Abstract
Objective: To investigate the expression of microRNA 210 (miR-210) in the epididymis of rats with varicocele and changes in miR-210 expression following high spermatic vein ligation, so as to explore the significance of the surgery in treating varicocele. Methods: A total of 21 male Sprague-Dawley (SD) rats aged 7 weeks were randomly divided into control group (n=7), experimental group (n=7), and surgical group (n=7). Varicocele model was established in both the experimental and surgical groups, while only vein isolation was performed in the control group. After 8 weeks, spermatic vein diameter were measured in the control and experimental rats, and collected the left epididymis (fixed in formaldehyde and frozen in refrigerator at -80 ℃). In the surgical group, left high spermatic vein ligation was performed, and the left epididymis was collected after 4 weeks as in the control and the experimental groups. The fixed epididymis tissues were treated with HE staining for observation of tissue injuries. The miR-210 expression in the epididymis was detected with reverse transcription-polymerase chain reaction (RT-PCR). At last every group had 5 rats. Results: The pathological examination showed that the number and distribution of mature sperms in epididymal duct in the experimental group were lower and less even compared to the control group, while the two indicators in the surgical group were better than those in the experimental group. The diameter of the left spermatic vein in the experimental group and pre-treatment surgical group were significantly enlarged than in the control group (P<0.01). The expression of miR-210 in the left epididymis in the experimental group was significantly higher compared with the control group(1.32±0.06 vs 0.98±0.14, P<0.01), while the expression of miR-210 in the left epididymis in the surgical group was significantly decreased compared with the experimental group (0.96±0.16 vs 1.32±0.06, P<0.01); the difference between the control group and the surgical group was not statistically significant (P>0.05). Conclusion: The expression of miR-210 in the epididymis may be increased by varicocele and reduced after high ligation of the affected spermatic vein.
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Affiliation(s)
- Y G Chen
- Department of Urology, Tianjin Medical University Second Hospital, Tianjin Institute of Urology, Tianjin Key Laboratory of Basic Medicine of Urology, Tianjin 300211, China
| | - S F Chen
- Department of Urology, Tianjin Medical University Second Hospital, Tianjin Institute of Urology, Tianjin Key Laboratory of Basic Medicine of Urology, Tianjin 300211, China
| | - Y J Yang
- Department of Urology, Tianjin Medical University Second Hospital, Tianjin Institute of Urology, Tianjin Key Laboratory of Basic Medicine of Urology, Tianjin 300211, China
| | - A A Long
- Department of Urology, Tianjin Medical University Second Hospital, Tianjin Institute of Urology, Tianjin Key Laboratory of Basic Medicine of Urology, Tianjin 300211, China
| | - X Q Liu
- Department of Urology, Tianjin Medical University Second Hospital, Tianjin Institute of Urology, Tianjin Key Laboratory of Basic Medicine of Urology, Tianjin 300211, China
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Men LJ, Chen HY, Liu JZ, Zhang L, Liu GZ, Xiao TW, Wang JX, Chen SF, Li GY. [The effect of GPR137 gene silence on K562 cells proliferation]. Zhonghua Xue Ye Xue Za Zhi 2016; 37:525-8. [PMID: 27431082 PMCID: PMC7348334 DOI: 10.3760/cma.j.issn.0253-2727.2016.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ma SH, Ling FH, Sun YX, Chen SF, Li Z. Investigation on the role of XPG gene polymorphisms in breast cancer risk in a Chinese population. Genet Mol Res 2016; 15:gmr8066. [PMID: 27323134 DOI: 10.4238/gmr.15028066] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We conducted a case-control study to investigate the role of XPG gene polymorphisms (rs2094258, rs751402, and rs17655) in the development of breast cancer. Patients with breast cancer (320) and control subjects (294) were consecutively selected from the Zhongshan Hospital between April 2013 and January 2015. The genotyping of XPG rs2094258, rs751402, and rs17655 was performed using polymerase chain reaction-restriction fragment length polymorphism. Using the chi-square test, we did not find any significant differences in the genotype distributions of XPG rs2094258 (χ(2) = 1.48, P = 0.48), rs751402 (χ(2) = 0.65, P = 0.72), and rs17655 (χ(2) = 0.01, P = 0.92) genes between breast cancer patients and control subjects. The genotype distributions of XPG rs2094258, rs751402, and rs17655 did not deviate from the Hardy-Weinberg equilibrium in control subjects, and the P values were 0.58, 0.97, and 0.26, respectively. Using unconditional logistic regression analysis, we found that XPG rs2094258, rs751402 and rs17655 gene polymorphisms are not associated with the development of breast cancer after adjusting for potential confounding factors. In conclusion, we found that XPG rs2094258, rs751402, and rs17655 do not influence the development of breast cancer in a Chinese population.
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Affiliation(s)
- S H Ma
- Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Department of Mammary Gland Surgery, Zhongshan Hospital, Sun Yat-sen University, Zhongshan, China
| | - F H Ling
- Department of Mammary Gland Surgery, Zhongshan Hospital, Sun Yat-sen University, Zhongshan, China
| | - Y X Sun
- Department of Cardiovascular Medicine, Zhongshan Hospital, Sun Yat-sen University, Zhongshan, China
| | - S F Chen
- Department of Mammary Gland Surgery, Zhongshan Hospital, Sun Yat-sen University, Zhongshan, China
| | - Z Li
- Department of General Surgery, Zhujiang Hospital, Southern Medical University, Guangzhou, China
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Abstract
BACKGROUND Previous studies have demonstrated that the levels of B-type natriuretic peptide (BNP) in plasma are negatively correlated with Body Mass Index (BMI) whereas lean body mass is also closely related to plasma BNP. The purpose of this study is to determine the effect of protein nutritional status on plasma BNP in aged patients. METHODS AND RESULTS The cross-sectional study was applied and the anthropometric measurement and nutritional biochemical test was performed in 1118 elderly inpatients in a stable condition were enrolled in the study (mean age, 75 years; 54% women). The partial correlation and multivariate regression analysis were conducted to analyze the relation of plasma BNP with covariates. After adjustment for confounding factors such as age, smoking and coexisting diseases, we found that the concentrations of BNP were independently associated with serum albumin (β=-0.065, P<0.001), serum total cholesterol (β=-0.097, P<0.012) and calf circumference (β=-0.032, P<0.014) in female patients, and associated with the serum albumin (β=-0.051, P<0.001), prealbumin (β=-2.177, P<0.026), mid-arm circumference (β=-0.062, P<0.001) and grip strength (β=-0.100, P<0.048) in male patients. Every 1 gram per liter of increased serum albumin corresponded to the reduced plasma BNP in male patients by 13.9% (OR 0.861, 95% CI 0.817, 0.909) and in female patients by 13.4% (OR 0.866, 95% CI 0.819, 0.916). CONCLUSIONS Our study suggests that plasma BNP is negatively correlated with muscle mass, and it is also related to muscle force in male patients. The serum albumin is an independent determinant factor of BNP in both men and women. These findings suggest that good protein nutritional status could be beneficial in maintaining the cardiac function in elder population.
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Affiliation(s)
- S F Chen
- Chunli Cui, Tongji Hospital, No. 389 xin cun road, Shanghai, China. 200065. Mobile: 13661969279, E-mail:
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Wu TS, Li HD, Chen YW, Chen SF, Su YS, Chu CH, Pao CW, Lee JF, Lai CH, Jeng HT, Chang SL, Soo YL. Unconventional interplay between heterovalent dopant elements: Switch-and-modulator band-gap engineering in (Y, Co)-Codoped CeO2 nanocrystals. Sci Rep 2015; 5:15415. [PMID: 26486721 PMCID: PMC4613893 DOI: 10.1038/srep15415] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 09/28/2015] [Indexed: 11/13/2022] Open
Abstract
We report the experimental observation and theoretical explanation of an unconventional interplay between divalent Co and trivalent Y dopants, both of which incur oxygen vacancies in the CeO2 host that has predominantly tetravalent Ce cations. The Co dopant atoms were experimentally found to act as a switch that turns on the dormant effect of Y-modulated band-gap reduction. As revealed by density functional theory (DFT) calculations with structures verified by synchrotron-radiation x-ray measurements, a Co 3d band that hybridizes with Ce 4f band was lowered due to reduced O 2p repulsion arising from oxygen vacancies incurred by Y doping and therefore gave rise to the observed band-gap narrowing effect. Such switch-and-modulator scheme for band-gap engineering in nanocrystal materials can lead to important applications in environmental protection and solar energy harvesting technologies.
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Affiliation(s)
- T S Wu
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
| | - H D Li
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
| | - Y W Chen
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
| | - S F Chen
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
| | - Y S Su
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - C H Chu
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - C W Pao
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - J F Lee
- National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - C H Lai
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu, Taiwan
| | - H T Jeng
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan.,Institute of Physics, Academia Sinica, Taipei, Taiwan
| | - S L Chang
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan.,National Synchrotron Radiation Research Center, Hsinchu, Taiwan
| | - Y L Soo
- Department of Physics, National Tsing Hua University, Hsinchu, Taiwan.,National Synchrotron Radiation Research Center, Hsinchu, Taiwan
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Fang XL, Zhu XT, Chen SF, Zhang ZQ, Zeng QJ, Deng L, Peng JL, Yu JJ, Wang LN, Wang SB, Gao P, Jiang QY, Shu G. Differential gene expression pattern in hypothalamus of chickens during fasting-induced metabolic reprogramming: Functions of glucose and lipid metabolism in the feed intake of chickens. Poult Sci 2014; 93:2841-54. [DOI: 10.3382/ps.2014-04047] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Chen SF, Kato Y, Sinha R, Kumar A, Watabe T, Imizu S, Oda J, Oguri D, Sano H, Hirose Y. Surgical treatment of patients with unruptured intracranial aneurysms. J Clin Neurosci 2014; 22:69-72. [PMID: 25443084 DOI: 10.1016/j.jocn.2014.05.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Revised: 05/18/2014] [Accepted: 05/24/2014] [Indexed: 11/29/2022]
Abstract
We present our experience with elective microsurgical clipping of unruptured intracranial aneurysms (UIA) and analyze this management. A total of 150 patients with UIA were reviewed and data were collected with regard to age, sex, presence of symptoms, location and size of the aneurysms, surgical complications and postoperative 1 year outcomes. Aneurysm size was assessed either by three-dimensional CT angiography or digital subtraction angiogram. Glasgow Outcome Scale was used to assess clinical outcomes. One hundred and fifty patients with 165 aneurysms were treated in this series. The mean size of the UIA was 5.6mm. Eighty aneurysms (48.5%) were less than 5mm in size, and 73 (44.2%) were from 5 to 10mm. Ten (6.1%) of the aneurysms were large and two (1.2%) were giant. One hundred and forty-three were asymptomatic and seven were symptomatic before surgery. The outcome was good in 147 patients (98%), and only three patients (2%) had a treatment-related unfavorable outcome. Five patients experienced transient neurological deficits and one patient experienced permanent neurological deficits. Overall 98.7% of the treated aneurysms were satisfactorily obliterated. Wound complications were seen only in three patients. In conclusion, UIA pose a significant challenge for neurosurgeons, where a delicate balance between benefits and possible risks must be weighed. If the requisite expertise is available, they can be treated surgically with low morbidity and a good outcome at specialized neurovascular centers.
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Affiliation(s)
- S F Chen
- Department of Neurosurgery, The First Affiliated Hospital of Xiamen University, Xiamen, China
| | - Y Kato
- Department of Neurosurgery, Fujita Health University Hospital, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan.
| | - R Sinha
- Department of Neurosurgery, St. Stephen's Hospital, Delhi, India
| | - A Kumar
- Department of Neurosurgery, Nizam's Institute of Medical Science, Hyderabad, India
| | - T Watabe
- Department of Neurosurgery, Fujita Health University Hospital, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan
| | - S Imizu
- Department of Neurosurgery, Fujita Health University Hospital, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan
| | - J Oda
- Department of Neurosurgery, Fujita Health University Hospital, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan
| | - D Oguri
- Department of Neurosurgery, Fujita Health University Hospital, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan
| | - H Sano
- Department of Neurosurgery, Fujita Health University Hospital, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan
| | - Y Hirose
- Department of Neurosurgery, Fujita Health University Hospital, 1-98, Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan
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Affiliation(s)
- J W Chou
- School of Medicine, China Medical University Hospital, Taichung, Taiwan
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Zhang J, Chen SF, Luo YE. Asymptomatic spontaneous complete uterine rupture in a term pregnancy after uterine packing during previous caesarean section: a case report. CLIN EXP OBSTET GYN 2014; 41:597-598. [PMID: 25864270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Uterine rupture is a life-threatening obstetrical complication with significant neonatal and maternal morbidity. The authors report a 36-year-old woman with a history of previous caesarean section because of pre-eclampsia and antepartum haemorrhage at 31 gestational weeks during her first pregnancy. Postpartum haemorrhage occurred and the uterine cavity was packed with gauze for reducing blood loss. After two years, she underwent elective, repeat caesarean section at 38+1 gestational weeks with no abdominal pain or vaginal bleeding. During the operation, a six- to seven-cm-long defect was found in the lower uterine segment, with complete separation of the uterine scar and disruption of the visceral peritoneum. A live baby was delivered. The postoperative course was uneventful. Uterine dehiscence and rupture should be suspected in the presence of risk factors such as previous caesarean section, especially uterine packing involved. Spontaneous silent rupture can occur in women without any alarming symptoms.
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El-Nezami H, Tam PKH, Chan Y, Lau ASY, Leung FCC, Chen SF, Lan LCL, Wang MF. Impact of melamine-tainted milk on foetal kidneys and disease development later in life. Hong Kong Med J 2013; 19 Suppl 8:34-38. [PMID: 24473527] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Affiliation(s)
- H El-Nezami
- School of Biological Sciences, The University of Hong Kong
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Chen SF, Fichtner E, Morgan DP, Michailides TJ. First Report of Lasiodiplodia citricola and Neoscytalidium dimidiatum Causing Death of Graft Union of English Walnut in California. Plant Dis 2013; 97:993. [PMID: 30722540 DOI: 10.1094/pdis-10-12-1000-pdn] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
California produces 99% of the English walnuts (Juglans regia) in the USA. In August 2012 in Tulare County, about 5,000 out of 90,000 trees were killed in a walnut nursery by a distinct black canker that developed around the graft union. The cankers appeared to be initiated at the heading cut on the rootstock, and expanded down to the rootstock and through the budded union up to the scion, resulting in mortality of scion. The walnut nursery was located adjacent to a mature walnut orchard. The fungi isolated from the cankers were identified as Lasiodiplodia citricola and Neoscytalidium dimidiatum based on morphological characteristics and DNA sequence comparisons. L. citricola was isolated from one of the 10 graft unions, while N. dimidiatum from the other nine. L. citricola isolates were characterized by white, aerial mycelium on potato dextrose agar that turned gray after 4 days and produced ellipsoidal to ovoid hyaline one-celled conidia that became 2-celled and brown with thick walls and longitudinal striations in the wall (1). N. dimidiatum isolates were characterized by ellipsoid to ovoid, hyaline conidia with a truncate base and an acutely rounded apex, initially 1-celled, and some becoming brown and 2-celled at maturity; no muriform conidia were produced (3). These identifications were confirmed by analyses of the ITS, BT2, and TEF-1α gene regions. The three gene regions were amplified by using the primers and methods described in (4). For L. citricola (isolates 7E78 to 7E80), a DNA sequence BLASTn at GenBank showed 100% identity with accessions GU945354 (ITS) and GU945340 (TEF-1α) of the ex-type specimen (CBS124707, BT2 sequencing data was not available) (3). For N. dimidiatum (isolates 7E61 to 7E63), a BLASTn search showed a high identify (ITS, 100%; BT2, 99%; TEF-1α, 99%) with reference sequence of N. dimidiatum (ITS, GQ330903; BT2, GU251768; TEF-1α, GU251240). Sequences of the studied DNA regions were deposited to GenBank as KC357298 to KC357303 (ITS); KC357304 to KC357309 (BT2); and, KC357310 to KC357315 (TEF-1α). The pathogenicity of L. citricola in comparison with N. dimidiatum in J. regia cvs. Chandler, Tulare, and Vina was evaluated in an orchard at KARE, by using two isolates each of L. citricola (7E78, 7E80) and N. dimidiatum (7E61, 7E63). Pathogenicity tests were performed by inoculating ten 2-year-old branches per isolate in late September 2012 by the method described in (2). After 3 weeks, the average lesion lengths caused by L. citricola on Chandler, Tulare, and Vina were 152, 156, and 188 mm, respectively, and 32, 38, and 34 mm, respectively, caused by N. dimidiatum. The lesion length averages produced on the three cultivars by the four isolates were all significantly (P < 0.05) longer than their respective controls (average length 10 mm on all cultivars). L. citricola, but not N. dimidiatum, killed branches of Chandler, Tulare, and Vina in 10 days. Both L. citricola and N. dimidiatum were reisolated from the inoculated branches and no fungus was isolated from the control, confirming Koch's postulates. These results confirmed that the walnut graft union canker was caused by either L. citricola or N. dimidiatum. To our knowledge, this is the first report of death of newly grafted walnut trees caused by L. citricola and N. dimidiatum worldwide, and also the first report of L. citricola infecting walnut worldwide. References: (1) J. Abdollahzadeh et al. Persoonia. 25:1, 2010. (2) S. F. Chen et al. Plant Dis. 97:994, 2013. (3) D. Pavlic et al. Mycologia. 106:851, 2008. (4) B. Slippers et al. Mycologia. 96:83, 2004.
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Affiliation(s)
- S F Chen
- Department of Plant Pathology, University of California Davis, Kearney Agricultural and Extension Center (KARE), Parlier, 93648
| | - E Fichtner
- University of California Cooperative Extension, Tulare, 93274
| | - D P Morgan
- Department of Plant Pathology, University of California Davis, Kearney Agricultural and Extension Center (KARE), Parlier, 93648
| | - T J Michailides
- Department of Plant Pathology, University of California Davis, Kearney Agricultural and Extension Center (KARE), Parlier, 93648
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Chen SF, Morgan D, Beede RH, Michailides TJ. First Report of Lasiodiplodia theobromae Associated with Stem Canker of Almond in California. Plant Dis 2013; 97:994. [PMID: 30722526 DOI: 10.1094/pdis-11-12-1033-pdn] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
California is a major almond (Prunus dulcis) producer in the world. In September 2012, 2-year-old almond trees from an orchard in Fresno Co. with stem cankers were submitted for disease diagnosis. In a survey of the orchard, 12 ha (1,500 Nonpareil and 1,800 Monterey almond trees) of 48 ha trees had been killed apparently due to a stem canker. The cankers developed above the graft union, were covered with amber sap, and often girdled the trunk. Isolations made from tissues at the canker margins onto acidified potato dextrose agar (PDA) yielded two fungi, Macrophomina phaseolina (Tassi) Goid and Lasiodiplodia theobromae (Pat.) Griffon & Maubl (1). M. phaseolina and L. theobromae were isolated from eight and two of 10 cankered trees, respectively. No mixed infections were found. M. phaseolina isolates were characterized by gray hyphae that turned black with developing microsclerotia. L. theobromae isolates were characterized by white, aerial mycelium that turned mouse gray after 5 days. Young conidia were ellipsoidal, thick walled, initially hyaline, granular, and nonseptate; aged conidia were brown, 1-septate with longitudinal striations in the wall. Identity was confirmed by analyses of the internal transcribed spacer (ITS), β-tubulin 2 (BT2), and the translation elongation factor 1-alpha (TEF-1α) gene regions. BLAST searches at GenBank showed a high identity with reference sequences of type specimens both for M. phaseolina (isolates 7E64 to 7E69: ITS, 100%; BT2, 99%; TEF-1α, 99%) and L. theobromae (isolates 7E86 to 7E88: ITS, 99%; BT2, 99%; TEF-1α, 100%). Sequences of three gene regions were deposited as GenBank accessions KC357271 to KC357279 (ITS); KC357280 to KC357288 (BT2); and KC357289 to KC357297 (TEF-1α). The pathogenicity of M. phaseolina and L. theobromae to P. dulcis cultivars Butte, Carmel, Nonpareil, and Padre was investigated in an orchard at KARE using four isolates of M. phaseolina (7E64, 7E65, 7E66, and 7E69) and two isolates of L. theobromae (7E86 and 7E88). Ten 2-year-old branches per isolate from 7-year-old trees were inoculated with each isolate in late September 2012, after removing the bark with a 7-mm cork borer and placing a 7-day-old 7-mm-diameter agar plug bearing mycelium of each isolate directly into the fresh wound, mycelium side down. Ten additional branches of each of the four cultivars were inoculated with sterile PDA plugs and served as negative controls. Three weeks after inoculation, the average lesion produced by M. phaseolina on Butte, Carmel, Nonpareil, and Padre was 53, 52, 41, and 37 mm in length, respectively. Lesions produced by L. theobromae were 191, 206, 194, and 103 mm in length on the four cultivars, respectively. No disease lesion, only wounds, were produced on negative controls. Lesions produced by both pathogens were longer (P < 0.05) than wounds on the controls (average length 10 mm on all cultivars). Both L. theobromae isolates killed branches of cultivars Butte, Carmel, and Nonpareil in 2 weeks. M. phaseolina and L. theobromae were reisolated from the inoculated branches, and no fungus was reisolated from controls. Based on pathogenicity results, L. theobromae is more virulent to almond branches than M. phaseolina. To our knowledge, this is the second report of M. phaseolina (2) and the first report of L. theobromae as pathogens of P. dulcis trees in California. References: (1) A. Alves et al. Fungal Diversity 28:1, 2008. (2) P. Inderbitzin et al. Mycologia 102:1350, 2010.
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Affiliation(s)
- S F Chen
- Department of Plant Pathology, University of California Davis, Kearney Agricultural and Extension Center (KARE), Parlier, 93648
| | - D Morgan
- Department of Plant Pathology, University of California Davis, Kearney Agricultural and Extension Center (KARE), Parlier, 93648
| | - R H Beede
- University of California Cooperative Extension Kings County, Hanford, 93230
| | - T J Michailides
- Department of Plant Pathology, University of California Davis, Kearney Agricultural and Extension Center (KARE), Parlier, 93648
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Affiliation(s)
- A J Eid
- Division of Infectious Diseases, University of Kansas Medical Center, Kansas City, KS, USA.
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Xie JB, Bai LQ, Wang LY, Chen SF. Phylogeny of 16S rRNA and nifH genes and regulation of nitrogenase activity by oxygen and ammonium in the genus Paenibacillus. Mikrobiologiia 2012; 81:760-767. [PMID: 23610927] [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: 06/02/2023]
Abstract
All Paenibacillus 16S rDNA sequences, except for that of Paenibacillus massiliensis T7, formed a coherent cluster, distinct from Gram-positive nitrogen-fixing Clostridium pasteurianum and Heliobacterium chlorum. All Paenibacillus NifH sequences formed two main clusters. Cluster I encompassing the NifH sequences from most of members of Paenibacillus spp., such as Paenibacillus azotofixans NifH1 and NifH2, Paenibacillus polymyxa and Paenibacillus macerans. Cluster II including only P. azotofixans NifH3. Curiously, three copies of nifH genes of Paenibacillus sabine T27 clustered within P. azotofixans cluster I (NifH1 and NifH2). The effect of O2 and ammonium on nitrogenase activity was studied with 14 different nitrogen-fixing Paenibacillus strains. The optimal oxygen concentration level for all Paenibacillus strains is in the 0 to 0.05% range, similar to that for Klebsiella pneumoniae. In all Paenibacillus strains, the highest nitrogenase activity is obtained in the condition of 0-0.1 mM NH4Cl and the increase of NH4CI from 0.1 to 5 mM caused a rapid inhibition of nitrogenase activity. However, the inhibition was reversible in the presence of 200 mM NH4Cl in some Paenibacillus strains. It is the first time to use almost all of the recognized nitrogen-fixing Paenibacilus spp. to investigate the phylogeny of 16S rRNA and nifH genes. The data that the inhibition of O2 and ammonium on nitrogenase acitivity will provide a base for studying the molecular regulatory mechanism of nitrogen fixation in the genus Paenibacillus.
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Affiliation(s)
- J B Xie
- State Key Laboratory for Agrobiotechnology and College of Biological Sciences, China Agricultural University, Beijing 100193, P.R. China
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Affiliation(s)
- J W Chou
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, China Medical University Hospital, China Medical University, North District Taichung, Taiwan
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Trost BM, Chen SF. A synthesis of substituted pyrrolidines via a palladium(2+)-catalyzed cyclization. An unusual approach to a carbapenem. J Am Chem Soc 2012; 108:6053-4. [PMID: 22175379 DOI: 10.1021/ja00279a071] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
The interstitial cells of Cajal (ICC) are widely believed to be neuroeffector cells of smooth muscle activity in all tubular organs, including the oviduct. The avian oviduct involves the secretion, sheathing, and transportation of a large-sized egg, but there is no information available on ICC in this special organ. We have demonstrated the presence of ICC in different segments throughout the oviduct in the laying hen and provided details on their ultrastructure by transmission electron microscopy technique, for the first time. The observed ICC appeared bipolar and multipolar cells of different shapes, with varying nuclear morphologies, a thin rim of electron-dense cytoplasm, and an infrequent basal lamina. They showed moniliform primary processes with one or 2 secondary or terminal processes. We found ICC near smooth muscle cells, nerve fibers, and the epithelia, where they make specialized contacts in the form of close membrane associations or gap-like junctions and peg-and-socket-like junctions. Intricate labyrinthine-type networking contacts were also present in ICC processes. Moreover, we report for the first time, that ICC in avian oviduct make interdigitating contacts with the epithelium. Cytoplasmic organelles identified in ICC include numerous well-developed mitochondria, abundant rough endoplasmic reticulum, and dispersed intermediate filaments. Many caveolae and vesicles were also present. Golgi bodies and centrioles were rare. Fibroblasts, on the other hand, were distinct cells with larger cytoplasmic area, more rough endoplasmic reticulum, and less mitochondrial content. No basal lamina, intermediate filaments, or caveolae were present in fibroblasts. Their processes were shorter and showed no contacts with smooth muscle cells or nerves. We conclude that these ICC might also have a key role in the regulatory mechanisms of motility and transportation in the hen oviduct, as already proved in mammalian oviduct. Such role of ICC might also be responsible for the function of the muscular infundibulum, where the fertilization takes place, and that moves to surround the released ovum, failure of which results in the internal laying.
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Affiliation(s)
- J A Gandahi
- Laboratory of Cell Biology and Embryology, College of Veterinary Medicine, Nanjing Agricultural University, PR China
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Oda J, Kato Y, Chen SF, Sodhiya P, Watabe T, Imizu S, Oguri D, Sano H, Hirose Y. Intraoperative near-infrared indocyanine green-videoangiography (ICG-VA) and graphic analysis of fluorescence intensity in cerebral aneurysm surgery. J Clin Neurosci 2011; 18:1097-100. [PMID: 21715173 DOI: 10.1016/j.jocn.2010.12.045] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 12/10/2010] [Accepted: 12/13/2010] [Indexed: 02/08/2023]
Abstract
We present our preliminary experience with intraoperative near-infrared indocyanine green-videoangiography (ICG-VA) and analysis of blood flow dynamics using fluorescence intensity assessment in cerebral aneurysm clipping surgery. Thirty-nine patients with 43 intracranial aneurysms underwent microsurgical clipping. Intraoperative ICG-VA was performed before and after clip application. An infrared fluorescence module integrated into a surgical microscope was used to visualize fluorescence in the surgical field and we recorded the emitted fluorescent light. An integrated analytical visualization tool simultaneously analyzed the video sequence and converted it into an intensity diagram, which allowed an objective evaluation of the results rather than the subjective assessment of fluorescence using ICG-VA. Overall, ICG-VA was performed 137 times. Incomplete clipping was detected in four patients, which allowed suitable adjustment to completely obliterate the aneurysm. In 12 patients, perforators arising close to, or from, the aneurysmal neck were identified in the surgical field. In three patients, the ICG-VA intensity diagram provided valuable information leading to modification of the primary surgical maneuver. ICG-VA provides high resolution images allowing real-time assessment of the blood flow in the parent artery and arterial branches, including the perforators. The intensity diagram is useful for providing a more objective record of the hemodynamics than the traditional ICG-VA, which relies more on subjective assessment and may allow interobserver variability. We conclude that ICG-VA, combined with the intensity diagram, can reduce the morbidity and complications associated with aneurysm clipping and improve patient outcomes.
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Affiliation(s)
- Jumpei Oda
- Department of Neurosurgery, Fujita Health University Hospital, 1-98 Dengakugakubo, Kutsukake, Toyoake, Aichi 470-1192, Japan
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Chen SF, Kato Y, Oda J, Kumar A, Watabe T, Imizu S, Oguri D, Sano H, Hirose Y. The application of intraoperative near-infrared indocyanine green videoangiography and analysis of fluorescence intensity in cerebrovascular surgery. Surg Neurol Int 2011; 2:42. [PMID: 21541008 PMCID: PMC3075608 DOI: 10.4103/2152-7806.78517] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [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: 11/02/2010] [Accepted: 02/11/2011] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE To evaluate the usefulness and limitations of the intraoperative near-infrared (NIR) indocyanine green videoangiography (ICG-VA) and analysis of fluorescence intensity in cerebrovascular surgery. METHODS Forty-eight patients received ICG-VA during various surgical procedures from May 2010 to August 2010. Included among them were 45 cases of cerebral aneurysms and 3 cases of cerebral arteriovenous malformations (AVMs). The infrared fluorescence module integrated into the surgical microscope was used to visualize fluorescent areas in the surgical field. An integrated analytical visualization tool constantly analyzed the fluorescence video sequence and generated it in the form of an intensity diagram for objective interpretation. RESULTS Overall, the procedure of ICG VA was done 158 times in 48 patients. There was no adverse effect of ICG dye. In cerebral aneurysm cases, the images obtained were of high resolution. In 4 cases, incomplete clipping was detected by ICG-VA and allowed suitable adjustment to completely obliterate the aneurysm. In 3 aneurysm cases, the intensity diagram of ICG VA provided valuable information. ICG-VA identified the feeding arteries, the draining veins, and nidus in all 3 AVM cases, which was confirmed by an immediate analysis of fluorescence intensity. CONCLUSIONS ICG-VA provides high resolution images allowing real-time assessment of the blood flow in surgical field. The intensity analysis function, in addition, is a useful adjunct to improve the accuracy of the clipping and decrease the complication rates in cerebral aneurysm cases. In cerebral AVM cases, with the help of color map and intensity diagram function, the superficial feeders, drainers, and nidus can be identified easily.
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Affiliation(s)
- S F Chen
- Department of Neurosurgery, The First Affiliated Hospital of Xiamen University, Xiamen, China
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Jin HJ, Tu R, Xu F, Chen SF. Identification of nitrogen-fixing Paenibacillus from different plant rhizospheres and a novel nifH gene detected in the P. stellifer. Mikrobiologiia 2011; 80:121-128. [PMID: 21513217] [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: 05/30/2023]
Abstract
A total of 534 isolates were selectively obtained from different plant rhizospheres based on their growth on nitrogen-free medium and their resistance to 80 degrees C for 15 min. Of the 534 isolates, 23 isolates had nifH gene and exhibited nitrogenase activities. Based on 16S rDNA sequence, G + C content assay and DNA-DNA hybridization, by the 23 isolates, which were divided into four monophyletic clusters, all belonged to the Paenibacillus genus. NifH gene deduced amino acid alignment analysis revealed that cluster I, including 15 isolates, showed the highest NifH identity with Paenibacillus genus; while cluster II identified as P stellifer by DNA-DNA hybridization was consistent with four uncultured bacterial clones. This study suggested that the nitrogen-fixing Paenibacillus were distributed in various ecosystems and prevalent in different plant rhizospheres. It was the first demonstration that nitrogen fixation existed in P. jamilae and P. stellifer. In eight isolates identified as P. stellfer species, a novel nifH gene was detected in Paenibacillus.
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Affiliation(s)
- H J Jin
- State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100193, People's Republic of China
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Lin HC, Chen SF, Wang IT, Pfeiffer S. Increased risk of low birthweight and small for gestational age infants among women with tuberculosis. BJOG 2010. [DOI: 10.1111/j.1471-0528.2010.02677.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chen SF, Gryzenhout M, Roux J, Xie YJ, Wingfield MJ, Zhou XD. Identification and Pathogenicity of Chrysoporthe cubensis on Eucalyptus and Syzygium spp. in South China. Plant Dis 2010; 94:1143-1150. [PMID: 30743729 DOI: 10.1094/pdis-94-9-1143] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The genus Chrysoporthe includes important pathogens of plantation-grown Eucalyptus spp. and has been reported from several tree genera in the order Myrtales in tropical and subtropical areas of the world. During disease surveys in South China, fruiting structures typical of Chrysoporthe spp. were observed on cankers on Eucalyptus spp. and Syzygium cumini trees. The aim of this study was to confirm the identity of the Chrysoporthe cubensis infecting the Eucalyptus spp. and S. cumini and to test the pathogenicity of the fungus. Following glasshouse trials to select virulent isolates, field inoculations were undertaken to screen different commercial Eucalyptus genotypes for their susceptibility to the fungus. Isolates were characterized based on their morphology and DNA sequence data for the β-tubulin and internal transcribed spacer regions of the ribosomal DNA. Results showed that the putative pathogen represented the Asian form of C. cubensis, which occurred on numerous different Eucalyptus spp. and hybrid clones as well as S. cumini. Field inoculations showed that all six of the Eucalyptus genotypes tested are susceptible to infection by C. cubensis. Significant differences were observed between them, providing prospects to select disease-tolerant planting stock in the future.
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Affiliation(s)
- S F Chen
- Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa, and China Eucalypt Research Centre (CERC), Chinese Academy of Forestry (CAF), China
| | - M Gryzenhout
- Department of Microbiology and Plant Pathology, FABI
| | - J Roux
- Department of Microbiology and Plant Pathology, FABI
| | | | - M J Wingfield
- Department of Microbiology and Plant Pathology, FABI
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Wang XH, Qian RZ, Zhang W, Chen SF, Jin HM, Hu RM. MicroRNA-320 expression in myocardial microvascular endothelial cells and its relationship with insulin-like growth factor-1 in type 2 diabetic rats. Clin Exp Pharmacol Physiol 2008; 36:181-8. [PMID: 18986336 DOI: 10.1111/j.1440-1681.2008.05057.x] [Citation(s) in RCA: 202] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
1. The aim of the present study was to determine the role of myocardial microvascular endothelial cells (MMVEC) in impaired angiogenesis of type 2 diabetic Goto-Kakizaki (GK) rats. 2. A microRNA (miRNA) microarray was used to assess miRNA expression in MMVEC from GK and Wistar rats. Upregulation of miRNA-320 was observed in MMVEC from GK rats using real-time reverse transcription-polymerase chain reaction (RT-PCR). 3. So far, nine miRNAs have been reported to target angiogenic factors and/or receptors, including kinase insert domain containing receptor (Flk-1), insulin-like growth factor 1 (IGF-1) and insulin-like growth factor 1 receptor (IGF-1R). The predicted genes targeted by miR-320 include Flk-1, IGF-1 and IGF-1R. Western blot analysis and RT-PCR were used to analyse the protein and mRNA expression, respectively, of the putative genes IGF-1 and IGF-1R. The expression of IGF-1 and IGF-1R proteins decreased significantly in diabetic MMVEC. However, the expression of IGF-1 mRNA increased rather than decreased. The mRNA expression of IGF-1R did not differ significantly between diabetic and control MMVEC. 4. Transfection of an miR-320 inhibitor into MMVEC from GK rats confirmed that miR-320 impaired angiogenesis. The proliferation and migration of diabetic MMVEC improved after transfection of the miR-320 inhibitor. In addition, the miR-320 inhibitor significantly increased the expression of IGF-1 protein, but had no effect on the expression of IGF-1R. 5. Eleven miRNAs were upregulated in MMVEC from GK rats compared with those in Wistar rats: let-7e, miR-129, miR-291-5p, miR-320, miR-327, mir-333, miR-363-5p, miR-370, miR-494, miR-503 and miR-664. 6. The results indicate that upregulation of miR-320 in MMVEC from GK rats may be responsible for the inconsistency between the expression of IGF-1 protein and mRNA and therefore related to impaired angiogenesis in diabetes. Transfection of an miR-320 inhibitor may be a therapeutic approach for the treatment of impaired angiogenesis in diabetes.
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Affiliation(s)
- X H Wang
- Department of Physiology and Pathophysiology, Shanghai Medical College, Fudan University, Shanghai, China
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Huang CR, Lu CH, Chuang YC, Tsai NW, Chang CC, Chen SF, Wang HC, Chien CC, Chang WN. Adult Pseudomonas aeruginosa meningitis: high incidence of underlying medical and/or postneurosurgical conditions and high mortality rate. Jpn J Infect Dis 2007; 60:397-399. [PMID: 18032844] [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: 05/25/2023]
Abstract
We analyzed the clinical and laboratory characteristics, therapeutic outcome and prognostic factors of 25 cases of cerebrospinal fluid (CSF) culture-proven Pseudomonas aeruginosa adult bacterial meningitis (ABM). Twelve P. aeruginosa strains, isolated from clinical CSF specimens, were tested for antibiotic susceptibility. The 25 cases included 17 men and 8 women, aged 17 to 86 years (median=51). Of the 25 cases of P. aeruginosa ABM, 18 were the result of postneurosurgical infection and the other 7 were spontaneous infections. The latter 7 cases had serious underlying medical conditions. The antibiotic susceptibility rates of the 12 strains were as follows: ceftriaxone 16.7% (2/12), ceftazidime 91.7% (11/12), cefepime 83.3% (10/12), imipenem 83.3% (10/12), meropenem 83.3% (10/12) and ciprofloxacin 66.7% (8/12). The therapeutic results showed an overall mortality rate of 40% (10/25). The emergence of third-generation cephalosporin-resistant P. aeruginosa strains cultured from clinical CSF specimens in recent years has resulted in a therapeutic challenge in the treatment of ABM.
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Affiliation(s)
- C R Huang
- Department of Neurology, Chang Gung Memorial Hospital-Kaohsiung, Chang Gung University College of Medicine, Kaohsiung, Taiwan
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39
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Chen SF, Yang SF, Li JW, Nieh PC, Lin SY, Fu E, Bai CY, Jin JS, Lin CY, Nieh S. Expression of fascin in oral and oropharyngeal squamous cell carcinomas has prognostic significance - a tissue microarray study of 129 cases. Histopathology 2007; 51:173-83. [PMID: 17650213 DOI: 10.1111/j.1365-2559.2007.02755.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
AIMS To elucidate the role of fascin in oral and oropharyngeal squamous cell carcinoma (OSCC) by correlation with clinical parameters. METHODS AND RESULTS Paraffin sections using tissue microarrays of 129 patients with OSCC were investigated immunohistochemically. Fascin protein was overexpressed in OSCC cells compared with their non-neoplastic epithelial counterparts. For evaluating the intensity of fascin, 39 (30.2%) were classified as weakly immunoreactive, 76 (58.9%) as moderate reactive and 14 (10.9%) as intensely reactive. For evaluating the distribution of fascin, 64 (49.6%) were classified as < 55% and 65 (50.4%) were classified as >/= 55%. Fascin protein expression was correlated with size or extent of the tumour (P < 0.001), positive lymph node metastasis (P < 0.001), distant metastasis (P = 0.014) and clinical staging (P < 0.001). The immunoreactivity scores of fascin in OSCC were variable but showed significant correlation with histological grade, clinical TNM system and stage. CONCLUSION Expression of fascin protein may play an important role in progression of OSCC. Overexpression of fascin contributes to a more aggressive clinical course and suggests the potential of fascin as a new molecular target for therapeutic intervention.
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Affiliation(s)
- S F Chen
- Institute of Clinical Dentistry, National Yang-Ming University, Taipei, Taiwan
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Hermel E, Gafni J, Propp SS, Leavitt BR, Wellington CL, Young JE, Hackam AS, Logvinova AV, Peel AL, Chen SF, Hook V, Singaraja R, Krajewski S, Goldsmith PC, Ellerby HM, Hayden MR, Bredesen DE, Ellerby LM. Specific caspase interactions and amplification are involved in selective neuronal vulnerability in Huntington's disease. Cell Death Differ 2004; 11:424-38. [PMID: 14713958 DOI: 10.1038/sj.cdd.4401358] [Citation(s) in RCA: 163] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Huntington's disease (HD) is an autosomal dominant progressive neurodegenerative disorder resulting in selective neuronal loss and dysfunction in the striatum and cortex. The molecular pathways leading to the selectivity of neuronal cell death in HD are poorly understood. Proteolytic processing of full-length mutant huntingtin (Htt) and subsequent events may play an important role in the selective neuronal cell death found in this disease. Despite the identification of Htt as a substrate for caspases, it is not known which caspase(s) cleaves Htt in vivo or whether regional expression of caspases contribute to selective neuronal cells loss. Here, we evaluate whether specific caspases are involved in cell death induced by mutant Htt and if this correlates with our recent finding that Htt is cleaved in vivo at the caspase consensus site 552. We find that caspase-2 cleaves Htt selectively at amino acid 552. Further, Htt recruits caspase-2 into an apoptosome-like complex. Binding of caspase-2 to Htt is polyglutamine repeat-length dependent, and therefore may serve as a critical initiation step in HD cell death. This hypothesis is supported by the requirement of caspase-2 for the death of mouse primary striatal cells derived from HD transgenic mice expressing full-length Htt (YAC72). Expression of catalytically inactive (dominant-negative) forms of caspase-2, caspase-7, and to some extent caspase-6, reduced the cell death of YAC72 primary striatal cells, while the catalytically inactive forms of caspase-3, -8, and -9 did not. Histological analysis of post-mortem human brain tissue and YAC72 mice revealed activation of caspases and enhanced caspase-2 immunoreactivity in medium spiny neurons of the striatum and the cortical projection neurons when compared to controls. Further, upregulation of caspase-2 correlates directly with decreased levels of brain-derived neurotrophic factor in the cortex and striatum of 3-month YAC72 transgenic mice and therefore suggests that these changes are early events in HD pathogenesis. These data support the involvement of caspase-2 in the selective neuronal cell death associated with HD in the striatum and cortex.
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Affiliation(s)
- E Hermel
- The Buck Institute for Age Research, Novato, CA, USA
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Abstract
The chemopreventive role of 5-methoxypsoralen (5-MOP) in the human hepatocellular carcinoma (HCC) cell line was investigated by studying the regulation of proliferation and apoptosis in HCC (J5) cells. Morphological analysis, cell viability assay, DNA analysis and cell-cycle analysis suggest that there are at least three modes of the suppressive effects shown by 5-MOP: (a) kills J5 cells directly; (b) induces apoptosis by arresting J5 cells at the G2/M phase in the cell cycle; (c) induces apoptosis through an independent pathway with cell-cycle arrest at 24-72 h of exposure. Further immunoblot analysis demonstrated that inhibition of cyclin B1 by 5-MOP may play an important role in G2/M arrest of J5 cells and provides an additional way to prevent cells from entering the M phase and undergoing apoptosis. 5-MOP therefore appears to exert its anticarcinogenic properties by cytotoxic effect, inducing apoptosis and inhibiting proliferation in the human hepatocellular carcinoma cell line.
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Affiliation(s)
- Y M Lee
- Department of Medical Technology, Chungtai Institute of Health Sciences and Technology, Taichung, 406, Republic of, Taiwan, China
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Castro-Obregón S, Del Rio G, Chen SF, Swanson RA, Frankowski H, Rao RV, Stoka V, Vesce S, Nicholls DG, Bredesen DE. A ligand-receptor pair that triggers a non-apoptotic form of programmed cell death. Cell Death Differ 2002; 9:807-17. [PMID: 12107824 DOI: 10.1038/sj.cdd.4401035] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2001] [Revised: 01/23/2002] [Accepted: 01/29/2002] [Indexed: 01/17/2023] Open
Abstract
Several receptors that mediate apoptosis have been identified, such as Fas and tumor necrosis factor receptor I. Studies of the signal transduction pathways utilized by these receptors have played an important role in the understanding of apoptosis. Here we report the first ligand-receptor pair-the neuropeptide substance P and its receptor, neurokinin-1 receptor (NK(1)R)-that mediates an alternative, non-apoptotic form of programmed cell death. This pair is widely distributed in the central and peripheral nervous systems, and has been implicated in pain mediation and depression, among other effects. Here we demonstrate that substance P induces a non-apoptotic form of programmed cell death in hippocampal, striatal, and cortical neurons. This cell death requires gene expression, displays a non-apoptotic morphology, and is independent of caspase activation. The same form of cell death is induced by substance P in NK(1)R-transfected human embryonic kidney cells. These results argue that NK(1)R activates a death pathway different than apoptosis, and provide a signal transduction system by which to study an alternative, non-apoptotic cell death program.
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Affiliation(s)
- S Castro-Obregón
- Buck Institute for Age Research, 8001 Redwood Boulevard, Novato, CA 94945, USA
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Mainwaring MG, Rimsza LM, Chen SF, Gomez SP, Weeks FW, Reddy V, Lynch J, May WS, Kahn S, Moreb J, Leather H, Braylan R, Rowe TC, Fieniewicz KJ, Wingard JR. Treatment of refractory acute leukemia with timed sequential chemotherapy using topotecan followed by etoposide + mitoxantrone (T-EM) and correlation with topoisomerase II levels. Leuk Lymphoma 2002; 43:989-99. [PMID: 12148910 DOI: 10.1080/10428190290021339] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A phase I/II clinical study evaluated 17 patients with refractory/recurrent acute leukemia treated with 1.5 mg/m2/day topotecan on days 1-3 followed by etoposide (100 mg/m2/day)+mitoxantrone (10 mg/m2/day) on days 4, 5 and 9, 10. Timed sequential chemotherapy using the topoisomerase I-inhibitor topotecan before the topoisomerase II-inhibitors, etoposide+mitoxantrone (T-EM) treatment is proposed to induce topoisomerase II protein levels and potentiate the cytotoxic activity of the topoisomerase II-directed drugs. Fourteen patients had refractory and three had recurrent acute leukemia. The majority of patients were heavily pre-treated with greater than three re-induction chemotherapy regimens. Ten patients responded to T-EM treatment (59%). Four of seventeen (24%) had a complete remission and one had a partial remission. Four additional patients (24%) who scored complete leukemia clearance had no evidence of disease with complete white and red blood cell recovery but with platelet counts less than 100,000. The lack of platelet recovery in one patient having a partial response was scored as a partial leukemia clearance. The toxicity profile included major non-hematological toxicity including grade 3 mucositis (29%) and neutropenic fever (65%). Paired measurements of intracellular levels of topoisomerase II isoforms alpha and beta in leukemia blast cells (bone marrow) collected before (day 0) and after topotecan treatment (day 4) showed that a relative increase of topoisomerase IIalpha (Topo IIalpha) > or = 40% strongly correlated with response after T-EM treatment. Increased Topo IIalpha levels also corresponded to increased DNA fragmentation. Two patients who had an increase of Topo IIalpha of 20-25% had either a PR or PLC while patients with a < 10% increase showed no response to T-EM treatment. We conclude that timed sequential chemotherapy using topotecan followed by etoposide+mitoxantrone is an effective regimen for patients with refractory acute leukemia, and demonstrate Topo IIalpha protein level increases after topotecan treatment.
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Affiliation(s)
- M G Mainwaring
- University of Florida College of Medicine, Division of Hematology/Oncology, Gainesville, USA.
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Li ZH, Chen SF, Li JL. [Cloning and functional analysis of glnB from Azospirillum brasilense Yu62]. YI CHUAN XUE BAO = ACTA GENETICA SINICA 2002; 28:964-70. [PMID: 11695269] [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: 02/22/2023]
Abstract
The glnB gene of A. brasilense Yu62 was determined in a 3.7 kb EcoRI + PstI fragment. The glnA is located downstream of glnB and an ORF for hypothetical protein is on upstream of glnB. The deduced amino acid sequence of PII encoded by glnB is 71%, 77%, 79% and 69% identical to that of K. pneumoniae, Bradyrhizobium japonicum, Rhizobium leguninosarum and E. coli, respectively. A Km-casette was inserted into BglII site of glnB coding region and GlnB- mutant was obtained by homologous recombination. The GlnB- mutant has lost the nitrogenase activity, i.e.: Nif-. For the functional confirmation of glnB gene, a complementary test was carried out and it was shown that C-glnB(glnB::Km/glnB) can restore the nitrogenase activity. When the recombinant plasmid pVK-II which containined the coding region of glnB was introduced into A. brasilense Yu62 and A. brasilense Yu62 DraT-, respectively, the Yu62-II (containing pVK-II) and draT-II(containing pVK-II) showed higher nitrogenase activity than wild type. These results confirmed that glnB plays an important role in the regulation of nitrogen in A. brasilense.
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Affiliation(s)
- Z H Li
- College of Biology and National Key Laboraries for Agrobiotechnology, China Agricultural University, Beijing 100094, China
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Abstract
PURPOSE To estimate the distributions in width as well as in density of macular pigment (MP) in humans at different ages, imaging fundus reflectometry was employed as a tool to reach our aim. METHODS Imaging fundus reflectometry was used to measure the macular pigment distribution in human eyes with a modified fundus camera to which a cooled CCD camera was attached. The fundus images were taken at 460 nm and 560 nm after the retina was light-adapted to completely bleach rhodopsin. The density of macular pigment was estimated using a model described in the text. The variation in density with retinal eccentricity was fit to Gaussian distribution. The width of MP in retinal eccentricity was estimated by 95% covering area of the distribution profile. A total of 54 normal people served as subjects. They were divided into three groups with ages of 24.8 +/- 2.6 years (N = 24), 40.2 +/- 8.3 years (N = 13) and 67.5 +/- 7.1 years (N = 17) respectively. Statistical t-tests were employed to evaluate the differences in MP density, the half width of MP distributed (HWMPD) in retina with respect to age between the groups. Linear regression was also applied to reveal the relationships of HWMPD distribution with respect to age. RESULTS The results indicate that the average MP densities are 0.23 +/- 0.08, 0.22 +/- 0.06 and 0.23 +/- 0.06 density unit (DU) for the young to old age groups. The average MP density is 0.23 +/- 0.07. No statistical significant difference is found in the peak MP density between the groups (all p > 0.05). This result pretty agrees with the data that obtained from others by using optical methods. For the young to old age groups, the average estimated HWMPD are 2.6 degrees +/- 0.5 degrees, 3.1 degrees +/- 0.5 degrees and 4.1 degrees +/- 0.6 degrees respectively. The differences between loci of HWMPD in the three groups are statistically significant with p = 0.0059, p < 0.0001 and p = 0.0001 for young vs. mid-age, young vs. old and mid-age vs. old respectively. Linear regressions for the HWMPD vs. age (r = 0.734, p < 0.001) implies that the macular pigment can gradually accumulate and spread out to the periphery of retina through our life span with an increase rate of approximately 0.03 degrees /year. CONCLUSIONS The accumulation of MP is reflected by the broader area in the macula lutea due to age, but no significant change is observed in peak density. The cause of the extension in the macular area with respect to age is unknown.
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Affiliation(s)
- S F Chen
- Institute of Biomedical Engineering, National Yang-Ming University, Taipei, Taiwan R.O.C
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Abstract
The molecular mechanisms responsible for the conditioned enhancement of natural killer (NK) cell activity were investigated. The primary goal of the study was to examine the roles of glutamate and gamma-aminobutyric acid (GABA) in recall of the conditioned NK cell response. Both neurochemical blocking assay and high performance liquid chromatography (HPLC) technique were used in the study. Results from the neurochemical blocking assay demonstrated that glutamate but not GABA was required in recall of the conditioned NK cell response. NMDA but not the kainate/AMPA receptors, are believed to be involved. The levels of glutamate that were released and/or taken up also appeared to be critical in that interruption of glutamate release and/or uptake blocked the conditioned NK cell response. Results from the HPLC analysis, however, did not show any significant difference in the glutamate content between the conditioned and control brains.
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MESH Headings
- Administration, Inhalation
- Animals
- Brain/metabolism
- Camphor/administration & dosage
- Cells, Cultured
- Chromatography, High Pressure Liquid
- Conditioning, Classical/drug effects
- Conditioning, Classical/physiology
- Drug Administration Schedule
- Excitatory Amino Acid Antagonists/administration & dosage
- Female
- GABA Antagonists/administration & dosage
- Glutamic Acid/metabolism
- Immunity, Cellular/drug effects
- Immunity, Cellular/physiology
- Immunologic Memory/drug effects
- Immunologic Memory/physiology
- Injections, Intraperitoneal
- Injections, Intraventricular
- Killer Cells, Natural/cytology
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Mice
- Mice, Inbred BALB C
- Microinjections
- Poly I-C/administration & dosage
- Poly I-C/immunology
- Receptors, AMPA/antagonists & inhibitors
- Receptors, Kainic Acid/antagonists & inhibitors
- Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors
- gamma-Aminobutyric Acid/metabolism
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Affiliation(s)
- J S Kuo
- Department of Education and Research, Taichung Veterans General Hospital, Taichung, Taiwan
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47
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Abstract
Tie-1 and Tie-2 are receptor tyrosine kinases (RTKs) that are exclusively expressed in endothelial cells and play important roles in endothelial cell biology. The authors have reported previously the temporal profiles of Tie-1 and Tie-2 mRNA expression after focal cerebral ischemia-reperfusion. In the current study, the localization of Tie-1/Tie-2 mRNA and proteins were further investigated in the same focal ischemia model. In situ hybridization showed that, after 60-minute ischemia and 72-hour reperfusion, both Tie-1 and Tie-2 mRNA appeared as capillary-like structures in the ischemic middle cerebral artery (MCA) cortex. Western blot analysis showed a biphasic expression of Tie-1 protein in the same region. The first peak, spanning the ischemic and early reperfusion period. was of low intensity and short-lived. The second peak was of greater intensity and spanning the period from 72 to 168 hours after reperfusion. Similarly, Tie-2 expression at the protein level also exhibited a biphasic pattern. Immunohistochemical studies, after 72 hours of reperfusion, showed that although Tie-1 and Tie-2 were detected within the ischemic cortex, they actually were expressed in different populations of endothelial cells in different regions. In agreement with the in situ hybridization study, Tie-1 immunoreactivity appeared as capillary-like structures in cortical layers 2 to 4. Similar capillary-like appearance of Tie-2 immunoreactivity was noted in the outer cortical layers. In addition, Tie-2 immunoreactivity also was observed in cortical layer 6b, where de novo large vessel formation was noted. Cellular colocalization experiments revealed that Tie-2 is expressed in proximity to its antagonist, Angpo-2, as well as basic fibroblast growth factor (bFGF) and vascular endothelial growth factor (VEGF) in cortical layer 1, where active vessel remodeling was noted. Interestingly, bFGF only partially colocalized with VEGF, suggesting differential roles for these angiogenic factors during vessel remodeling. Tie-1 protein, to a lesser degree, also colocalized with Angpo-2, bFGF, and VEGF in cortical layer 1. Magnetic resonance imaging (MRI) showed increased regional cerebral blood flow (CBF) corresponding to the expression of these angiogenesis gene products. Together, these findings suggest that the evolving expression of angiogenesis genes underlie the robust vascular remodeling after ischemia and reperfusion.
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Affiliation(s)
- T N Lin
- Neuroscience Division, Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, Republic of China
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Agrawal S, Kandimalla ER, Yu D, Hollister BA, Chen SF, Dexter DL, Alford TL, Hill B, Bailey KS, Bono CP, Knoerzer DL, Morton PA. Potentiation of antitumor activity of irinotecan by chemically modified oligonucleotides. Int J Oncol 2001; 18:1061-9. [PMID: 11295057 DOI: 10.3892/ijo.18.5.1061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Co-administration of synthetic chemically modified oligonucleotides with irinotecan, a selective topoisomerase I inhibitor, provided a significant enhancement in the antitumor activity of irinotecan. The enhancement of antitumor activity of irinotecan with co-administration of chemically modified oligonucleotides was observed in several tumor models--pancreatic cancer (Panc-1), colon cancer (HCT-116) and melanoma (A375). Inhibition of tumor growth in all three models required the co-administration of irinotecan and chemically modified oligonucleotides, but was independent of the nucleotide sequence of the oligonucleotides. The potentiation of antitumor activity was dependent on the dose of irinotecan and chemically modified oligonucleotides administered. The enhancement of antitumor activity of irinotecan was also observed by co-administration of a phosphorothioate oligonucleotide, however, to a lesser extent than did chemically modified oligonucleotides, suggesting that metabolic stability of the oligonucleotide contributes to the enhancement of antitumor activity seen with irinotecan. The co-administration of dextran sulfate sodium with irinotecan showed insignificant potentiation of antitumor activity of irinotecan, suggesting that the enhancement of antitumor activity of irinotecan observed was not a result of polyanionic characteristic of oligonucleotides. Co-administration of irinotecan and chemically modified oligonucleotides did not result in increased toxicity in the tumor models studied. Potentiation of antitumor activity of irinotecan observed with co-administration of oligonucleotides suggests that the oligonucleotides affect the pharmacokinetics and/or metabolism of irinotecan. The use of chemically modified oligonucleotides together with irinotecan may increase the therapeutic index of irinotecan in cancer patients and continued development of such agents should be considered.
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Affiliation(s)
- S Agrawal
- Hybridon, Inc., Cambridge, MA 02139, USA.
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Abstract
Solid-phase microextraction coupled with GC-electron-capture detection was examined to analyze aqueous chlorothalonil residuals. The optimal conditions for chlorothalonil pre-concentration such as fiber polarity, temperature, salt addition, absorption time, as well as the interference were investigated in detail. In addition, the thermal desorption conditions in the injector were also systematically optimized. Experimental results indicated that an extraction with a 100-microm polydimethylsiloxane fiber for 40 min under conditions of 1250 rpm stirring rate, room temperature, and adding high concentration salt offered an optimal result. The thermal desorption of chlorothalonil at 240 degrees C for 3 min (including fiber regeneration) offered the best sensitive detection. A standard addition method for calibration was recommended to reduce the deviation from matrix interference. The proposed method provided a simple and rapid analytical procedure for chlorothalonil in water bodies with detection limits of 2.86 microg/l for distilled water, 3.06 microg/l for ground water, 4.77 microg/l for tap water, and 9.23 microg/l for farm water. The relative standard deviations were all below 3.0% (n=6) besides the farm water being below 9.2%. The calibration graph in the range of 5 to 200 microg/l is linear with very good correlation coefficient (r=0.999), and r=0.983 for farm water. Application was illustrated by the analysis of water samples collected from tap water, ground water and farm water in the southern Taichung area.
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Affiliation(s)
- S F Chen
- Department of Chemistry, National Chung-Hsing University, Taichung, Taiwan
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50
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Cheung WM, Chen SF, Nian GM, Lin TN. Induction of angiogenesis related genes in the contralateral cortex with a rat three-vessel occlusion model. CHINESE J PHYSIOL 2000; 43:119-24. [PMID: 11132088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023] Open
Abstract
The bFGF/FGFR, VEGF/VEGFR and Angiopoietin/Tie receptor system are crucial for angiogenesis and vascular remodeling. With a rat focal cerebral ischemia model, we previously reported dramatic changes in the vascular density and angiogenesis related genes in the ipsilateral cortex after 60 minutes severe ischemia. While only a small increase in the capillary density was noted in the contralateral cortex with very mild ischemia. In the present study we further reported that only Tie-1 and VEGFR-2 mRNA were significantly changed in the contralateral cortex with a p value of 0.0001 and 0.0168, respectively, and the degree of changes were very small. Interestingly, in contrast to a huge increase in the ipsilateral cortex, Tie-1 mRNA was slowly decreased after the onset of ischemia and stayed below the basal level throughout the remaining periods studied. The mechanism and significance for this decrease is not presently clear. In contrast to the ipsilateral cortex, the Angpo-1/Angpo-2 mRNA ratio was also slightly dropped below the basal level in the contralateral side in most of the ischemia-reperfusion periods studied, which is in line with the notion that small decrease in Angpo-1/Angpo-2 mRNA ratio implied small vascular remodeling activity. It is very likely that increase in this Angpo-1/Angpo-2 ratio is crucial for remodeling into large vessels and increase in Tie-1 may be crucial for capillary density increasing. Nevertheless, the detailed mechanisms and significance of differential expression of these genes and relationship to vascular remodeling remain to be characterized.
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MESH Headings
- Angiopoietin-1
- Angiopoietin-2
- Animals
- Blotting, Northern
- Brain Chemistry/genetics
- Cerebral Cortex/blood supply
- Cerebral Cortex/physiology
- Cerebrovascular Disorders/physiopathology
- Endothelial Growth Factors/genetics
- Fibroblast Growth Factor 2/genetics
- Functional Laterality
- Gene Expression/physiology
- Ischemic Attack, Transient/physiopathology
- Lymphokines/genetics
- Male
- Membrane Glycoproteins/genetics
- Neovascularization, Physiologic/genetics
- Proteins/genetics
- RNA, Messenger/analysis
- Rats
- Rats, Long-Evans
- Receptor Protein-Tyrosine Kinases/genetics
- Receptor, TIE-1
- Receptors, Cell Surface/genetics
- Receptors, Growth Factor/genetics
- Receptors, TIE
- Receptors, Vascular Endothelial Growth Factor
- Reperfusion Injury/physiopathology
- Stroke/physiopathology
- Vascular Endothelial Growth Factor A
- Vascular Endothelial Growth Factors
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Affiliation(s)
- W M Cheung
- Division of Neuroscience, Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan, ROC
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