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Li Y, Li Y, Du H, Lin YX, Du Q, Chen HB, Lu XX. [Analysis of clinical epidemiological characteristics of respiratory syncytial virus in children in a hospital of pediatric in Hubei Province from 2020 to 2023]. Zhonghua Yu Fang Yi Xue Za Zhi 2024; 58:213-218. [PMID: 38387953 DOI: 10.3760/cma.j.cn112150-20230810-00076] [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: 02/24/2024]
Abstract
Objective: To explore the clinical epidemiological characteristics of respiratory syncytial virus in children in Hubei Province from 2020 to 2023. Method: A single-center and cross-sectional study was used to analyze the clinical data of 3 271 children with respiratory syncytial virus infection in Wuhan Children's Hospital affiliated to Huazhong University of Science and Technology from July 1, 2020 to June 30, 2023. Nonparametric rank sum test and χ2 test were used for comparative analysis. Results: From July 1, 2020 to June 30, 2023, a total of 25 583 children were included in the analysis, of which 3 271(12.8%) children infected RSV. The detection rate was 16.3% in 2020-2021, 14.7% in 2021-2022 and 9.1% in 2022-2023. The detection rate decreased year by year (χ2=222.054, P<0.05). From 2020 to 2023, there was an anti-seasonal epidemic of RSV in spring and autumn. The detection rate of RSV in infants under 1 year old was the highest, but the median ages of RSV positive children increased (H=140.575, P<0.05). Pneumonia was the main clinical manifestation of RSV respiratory tract infection. Conclusion: The epidemiological characteristics of RSV in children in Hubei Province were different from those before. From 2020 to 2023, the detection rate of RSV decreased year by year. Besides winter, the prevalence of RSV could also be seen in spring and autumn. The median age of children infected with RSV increased after the epidemic. Pneumonia was the main clinical manifestation after RSV infection.
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Affiliation(s)
- Y Li
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China
| | - Y Li
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China
| | - H Du
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China
| | - Y X Lin
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China
| | - Q Du
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China
| | - H B Chen
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China
| | - X X Lu
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430016, China
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Zhang XW, Liu SY, Li X, Chen HB. [Environmental influences on food allergy]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:1921-1928. [PMID: 38186137 DOI: 10.3760/cma.j.cn112150-20230706-00522] [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: 01/09/2024]
Abstract
Food allergy is an abnormal immune response triggered by food allergens, resulting in symptoms such as vomiting, diarrhea, gastroesophageal reflux, pruritus, dyspnea, and in severe cases, anaphylactic shock and mortality. The prevalence of food allergy varies within the population, with a significantly higher incidence observed among children compared to adults. This escalating trend in pediatric food allergy has emerged as a prominent concern jeopardizing children's well-being, thus prompting extensive investigations within the realm of global public health. Over the past three decades, there has been a progressive increase in the global prevalence of food allergy, accompanied by a heightened severity of allergic manifestations. Environmental factors have been identified as crucial determinants in this escalating phenomenon. Extensive research has demonstrated the pivotal role played by the environment in both the onset and progression of food allergies. The present article aims to consolidate the effects of diverse environmental factors on food allergy, elucidating their underlying mechanisms. Emphasis is placed on delineating the impact of distinct environmental factors on food allergy, thereby furnishing valuable insights for comprehending the risk factors associated with this condition. Furthermore, this comprehensive analysis contributes to the advancement of scientific strategies for the prevention and management of food allergy, promoting the development and advancement of preventive medicine.
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Affiliation(s)
- X W Zhang
- State Key Laboratory of Food Science and Resource, School of Food Science and Technology, Nanchang University, Nanchang 330047, China School of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - S Y Liu
- State Key Laboratory of Food Science and Resource, School of Food Science and Technology, Nanchang University, Nanchang 330047, China School of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - X Li
- State Key Laboratory of Food Science and Resource, School of Food Science and Technology, Nanchang University, Nanchang 330047, China School of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - H B Chen
- State Key Laboratory of Food Science and Resource, School of Food Science and Technology, Nanchang University, Nanchang 330047, China Sino-German Joint Research Institute, Nanchang University, Nanchang 330047, China Jiangxi Province Key Laboratory of Food Allergy, Nanchang 330047, China
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Chen HB, Wang XQ, Du J, Shi J, Ji BY, Shi L, Shi YS, Zhou XT, Yang XH, Hu SS. [Long-term outcome of EVAHEART I implantable ventricular assist device for the treatment of end stage heart failure: clinical 3-year follow-up results of 15 cases]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:393-399. [PMID: 37057326 DOI: 10.3760/cma.j.cn112148-20220614-00472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
Objective: To evaluate the long-term efficacy and safety of the implantable ventricular assist system EVAHEART I in clinical use. Methods: Fifteen consecutive patients with end-stage heart failure who received left ventricular assist device therapy in Fuwai Hospital from January 2018 to December 2021 were enrolled in this study, their clinical data were retrospectively analyzed. Cardiac function, liver and kidney function, New York Heart Association (NYHA) classification, 6-minute walk distance and quality of life were evaluated before implantation and at 1, 6, 12, 24 and 36 months after device implantation. Drive cable infection, hemolysis, cerebrovascular events, mechanical failure, abnormally high-power consumption and abnormal pump flow were recorded during follow up. Results: All 15 patients were male, mean average age was (43.0±7.5) years, including 11 cases of dilated cardiomyopathy, 2 cases of ischemic cardiomyopathy, and 2 cases of valvular heart disease. All patients were hemodynamically stable on more than one intravenous vasoactive drugs, and 3 patients were supported by preoperative intra aortic balloon pump (IABP). Compared with before device implantation, left ventricular end-diastolic dimension (LVEDD) was significantly decreased ((80.93±6.69) mm vs. (63.73±6.31) mm, P<0.05), brain natriuretic peptide (BNP), total bilirubin and creatinine were also significantly decreased ((3 544.85±1 723.77) ng/L vs. (770.80±406.39) ng/L; (21.28±10.51) μmol/L vs. (17.39±7.68) μmol/L; (95.82±34.88) μmol/L vs. (77.32±43.81) μmol/L; P<0.05) at 1 week after device implantation. All patients in this group were in NYHA class Ⅳ before implantation, and 9 patients could recover to NYHA class Ⅲ, 3 to class Ⅱ, and 3 to class Ⅰ at 1 month after operation. All patients recovered to class Ⅰ-Ⅱ at 6 months after operation. The 6-minute walk distance, total quality of life and visual analogue scale were significantly increased and improved at 1 month after implantation compared with those before operation (P<0.05). All patients were implanted with EVAHEART I at speeds between 1 700-1 950 rpm, flow rates between 3.2-4.5 L/min, power consumption of 3-9 W. The 1-year, 2-year, and 3-year survival rates were 100%, 87%, and 80%, respectively. Three patients died of multiple organ failure at 412, 610, and 872 d after surgery, respectively. During long-term device carrying, 3 patients developed drive cable infection on 170, 220, and 475 d after surgery, respectively, and were cured by dressing change. One patient underwent heart transplantation at 155 d after surgery due to bacteremia. Three patients developed transient ischemic attack and 1 patient developed hemorrhagic stroke events, all cured without sequelae. Conclusion: EVAHEART I implantable left heart assist system can effectively treat critically ill patients with end-stage heart failure, can be carried for long-term life and significantly improve the survival rate, with clear clinical efficacy.
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Affiliation(s)
- H B Chen
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - X Q Wang
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - J Du
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - J Shi
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - B Y Ji
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - L Shi
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - Y S Shi
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - X T Zhou
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - X H Yang
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
| | - S S Hu
- Department of Cardiac Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, National Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, Beijing 100037, China
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Huang PQ, Du H, Chen HB, Li Y, Chen HW, Lei XL, Zhang MR, Lu XX. Invasive pulmonary fungal infections in children with severe human adenovirus type 7 pneumonia: A retrospective study. Pediatr Neonatol 2022; 63:388-393. [PMID: 35474019 DOI: 10.1016/j.pedneo.2022.03.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 10/31/2020] [Accepted: 03/25/2022] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND There has been a rapid increase in the number of human adenovirus type 7 (HAdV-7) and invasive pulmonary fungal infections (IPFIs) co-infection. METHODS In this study, we included patients with confirmed HAdV-7 infection during the period from 2018 to 2019 to explore clinical characteristics of severe HAdV-7 pneumonia combined with IPFIs. RESULTS Among the 143 patients, 35 cases were co-infected with IPFIs. Others were assigned to the control group (n Z 108). Patients wereprone to be complicated with respiratory failure, heart failure and hemophagocytic syndromein IPFIs group. Thirty-one species of fungi were detected in the IPFIs group, among whichAspergillus was the most common species. Compared to control group, patients had lowerlevels of WBC, CD3þ T lymphocyte counts and CD19þ B lymphocyte counts in IPFIs group. CONCLUSION Aspergillus is the most common species in IPFIs combined with severe HAdV-7 pneumonia. For children with severe HAdV-7 pneumonia who are younger, have a long course of disease, and have been admitted to the ICU, we should predict the occurrence of IPFIs when there is multi-system dysfunction and the reduction of CD3+ T lymphocyte counts and CD19+ B lymphocyte counts in course of their disease.
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Affiliation(s)
- P Q Huang
- Department of Electrocardiogram, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - H Du
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - H B Chen
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - Y Li
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - H W Chen
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - X L Lei
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - M R Zhang
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China
| | - X X Lu
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, 430014, China.
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Xing HJ, Chen XD, Sun HX, Dai YZ, Han YF, Ding LL, Liu JH, Chen HB. Regenerating gene IA predicts radiosensitivity and survival in nasopharyngeal carcinoma. J Physiol Pharmacol 2022; 73. [PMID: 35793764 DOI: 10.26402/jpp.2022.1.12] [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] [Received: 10/29/2021] [Accepted: 02/28/2022] [Indexed: 06/15/2023]
Abstract
Nasopharyngeal carcinoma (NPC) is a common malignancy in Southern China and Southeast Asia. Radiotherapy is the main treatment option. However, radiotherapy does not benefit all patients because there is no known precise biomarker that can be used for screening radioresistant patients. Genetic predisposition is closely related to tumor development, therapeutic response, and prognosis. The relationship between regenerating gene IA (REGIA) and NPC is unclear. This study aimed to retrospectively analyze the association between REGIA expression and metastasis, radiosensitivity, and survival in patients with NPC as well as assess the effect of radiation on REGIA expression in vitro. Immunohistochemical staining was used to detect REGIA. The relationship between REGIA expression in radioresistant NPC and the prognosis of CNE1 NPC cells were analyzed using quantitative real-time polymerase chain reaction and Western blotting. We found that increased doses of radiation in CNE1 cells significantly decreased REGIA expression (P<0.05). The overall rate of REGIA-positive expression was 47.15% in NPC tissues and 45.00% and 61.02% in radiosensitive and radioresistant cases, respectively, showing significant differences (P<0.05). A REGIA-positive protein expression rate had a negative correlation with radiosensitivity in NPC (r= -0.109, P=0.047). Both REGIA-positive and REGIA-negative expression strongly predicted the overall survival rate and progression-free survival of NPC patients (P<0.01). A multivariate analysis indicated that REGIA was an inverse prognostic factor in NPC patients (REGIA-positive expression: hazard ratio (HR)=2.139, 95% confidence interval (CI)=1.56-2.94, P<0.001 and REGIA-negative expression: HR=1.958, 95% CI=1.42-2.69, P<0.001). In conclusion: Radiation can affect REGIA expression. The REGIA expression level correlated with radioresistance and a poor prognosis. In addition, REGIA expression might act as a potential therapeutic target and prognostic predictor in NPC patients.
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Affiliation(s)
- H J Xing
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Chinese Academy of Sciences, Shenzhen Hospital, Shenzhen, China.
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated Xinhua Hospital of Hainan Medical Colleage, Haikou, China
| | - X D Chen
- Department of Otorhinolaryngology, Head and Neck Surgery, Affiliated General Hospital of Shenzhen University, Shenzhen, China
| | - H X Sun
- Wuhan Medical Science Research Institution, Wuhan, China
| | - Y Z Dai
- Department of Throat, Head and Neck Surgery, Affiliated Otolaryngological Hospital, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Y F Han
- Department of Epidemiology, Public Health College of Xiamen University, Xiamen, China
| | - L L Ding
- Department of Pathology, Affiliated Hospital of Hainan Medical College, Haikou, China
| | - J H Liu
- Department of Otorhinolaryngology, Head and Neck Surgery, General hospital of Shenzhen University, Shenzhen, China
| | - H B Chen
- Department of blood transfusion, the Second Affiliated hospital of Hainan Medical Colleage, Haikou, China
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Xu JR, Yang DH, Long GF, Sun H, Chen HB. [Establishment and validation of prognosis predictive model using m 6A RNA methylation regulators in children acute myeloid leukemia]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:983-989. [PMID: 34445837 DOI: 10.3760/cma.j.cn112150-20210303-00212] [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 figure out the association between the expression of m6A RNA methylation regulators and the prognosis of children AML, and provide genetic markers for monitoring the progression and recurrence of AML. Methods: Twenty two m6A RNA methylation regulators were firstly analyzed using the data from Therapeutically Applicable Research To Generate Effective Treatments(TARGET) database and The Genotype-Tissue Expression(GTEx) database, Wilcoxon rank test was performed to analyze the differentially expression of m6A RNA methylation regulators between the AML and normal tissue, 296 AML children were divided into training cohort and validation cohort by simple random sampling method, Lasso regression was used to screen out the risk factors and the multivariate Cox regression was applied for establishing prognosis predicting model in training cohort. Kaplan-Meier survival curve, time-dependent ROC curve and multivariate Cox regression were used to estimate the efficiency of risk score calculated by predictive model in validation cohort. Results: Twenty one m6A genes were up regulated in AML compared to Normal patients. Five m6A RNA methylation regulators(ZC3H13, YTHDC2, HNRNPA2B1, METTL3, METTL5) were included in final predicting model. Risk score could independently predict the survival of AML patients in training cohort(HR:2.72, 95%CI: 1.54-4.81, P=0.000 6) and validation cohort(HR:2.01, 95%CI:1.14-3.50, P=0.016). Low-risk patients had better prognoses than high-risk patients both in training cohort(P=0.001 9) and validation cohort(P=0.023). Conclusion: This prognosis predicting model constructed by m6A RNA methylation regulators could independently predict the survival prognosis in AML children, and should be helpful for clinical therapy.
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Affiliation(s)
- J R Xu
- Clinical Laboratory, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - D H Yang
- Clinical Laboratory, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - G F Long
- Clinical Laboratory, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - H Sun
- Clinical Laboratory, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - H B Chen
- Clinical Laboratory, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
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Ma B, Ma XY, Chen HB, Zhang Y, Li LH. [Effects of environmental factors on the distribution of suitable habitats of Ixodes ovatus in China]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:281-286. [PMID: 34286530 DOI: 10.16250/j.32.1374.2020291] [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: 11/27/2022]
Abstract
OBJECTIVE To identify the environmental factors affecting the distribution of suitable habitats of Ixodes ovatus, and to examine the effects of environmental changes on the distribution of suitable habitats of I. ovatus. METHODS Data pertaining to the distribution of I. ovatus in China were captured by literature review. The distribution of suitable habitats of I. ovatus in China was simulated using the maximum entropy model with the environmental variable data and the I. ovatus distribution data. In addition, the potential distribution of suitable habitats of I. ovatus was predicted based on the 2050 and 2070 environmental data. RESULTS The current suitable habitats of I. ovatus cover 3.11 million km2, accounting for 32.28% of the total land area of China, and they are mainly concentrated in southwestern and northwestern China. Among the screened 16 environmental factors, the standard deviation of seasonal variation of temperature, average annual precipitation and altitude were predominant environmental factors affecting the distribution of suitable habitats of I. ovatus, and these three variables contributed 76.5% to the distribution of suitable habitats of I. ovatus in China. The suitable habitats of I. ovatus were predicted to showing a tendency towards expansion to northwestern and northeastern China in 2050 and 2070, and the proportion of highly suitable habitats of I. ovatus was predicted to increase. CONCLUSIONS Moderate climate, adequate precipitation and high altitude are favorable for the survival of I. ovatus. Future climate changes may cause expansion of suitable habitats of I. ovatus in China.
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Affiliation(s)
- B Ma
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China.,School of Public Health and Management, Weifang Medical University, China
| | - X Y Ma
- Shengli Oilfield Central Hospital, China
| | - H B Chen
- School of Public Health and Management, Weifang Medical University, China
| | - Y Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China
| | - L H Li
- School of Public Health and Management, Weifang Medical University, China
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Chen G, Wang Y, Zhao X, Xie XZ, Zhao JG, Deng T, Chen ZY, Chen HB, Tong YF, Yang Z, Ding XW, Guo PY, Yu HT, Wu LJ, Zhang SN, Zhu QD, Li JJ, Shan YF, Yu FX, Yu ZP, Xia JL. A positive feedback loop between Periostin and TGFβ1 induces and maintains the stemness of hepatocellular carcinoma cells via AP-2α activation. J Exp Clin Cancer Res 2021; 40:218. [PMID: 34193219 PMCID: PMC8243733 DOI: 10.1186/s13046-021-02011-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Accepted: 06/09/2021] [Indexed: 02/02/2023]
Abstract
Background Liver cancer stem cells (LCSCs) play key roles in the metastasis, recurrence, and chemotherapeutic resistance of hepatocellular carcinoma (HCC). Our previous research showed that the POSTN gene is closely related to the malignant progression and poor prognosis of HCC. This study aimed to elucidate the role of POSTN in generating LCSCs and maintaining their stemness as well as the underlying mechanisms. Methods Human HCC tissues and matched adjacent normal tissues were obtained from 110 patients. Immunohistochemistry, western blotting (WB), and RT-PCR were performed to detect the expression of POSTN and stemness factors. The roles of transforming growth factor (TGF)-β1 and AP-2α in the POSTN-induced stemness transformation of HCC cells were explored in vitro and in vivo using LCSCs obtained by CD133+ cell sorting. Results The high expression of POSTN was correlated with the expression of various stemness factors, particularly CD133, in our HCC patient cohort and in TCGA and ICGC datasets. Knockdown of POSTN expression decreased the abilities of HCC cell lines to form tumours in xenograft mouse models. Knockdown of POSTN expression also suppressed cell viability and clone formation, invasion, and sphere formation abilities in vitro. Knockdown of AP-2α attenuated the generation of CD133+ LCSCs and their malignant behaviours, indicating that AP-2α was a critical factor that mediated the POSTN-induced stemness transformation and maintenance of HCC cells. The role of AP-2α was verified by using a specific αvβ3 antagonist, cilengitide, in vitro and in vivo. Activation of POSTN could release TGFβ1 from the extracellular matrix and initiated POSTN/TGFβ1 positive feedback signalling. Furthermore, we found that the combined use of cilengitide and lenvatinib suppressed the growth of HCC cells with high POSTN expression more effectively than the use of lenvatinib alone in the patient-derived xenograft (PDX) mouse model. Conclusions The POSTN/TGFβ1 positive feedback pathway regulates the expression of stemness factors and the malignant progression of HCC cells by regulating the transcriptional activation of AP-2α. This pathway may serve as a new target for targeted gene therapy in HCC. Supplementary Information The online version contains supplementary material available at 10.1186/s13046-021-02011-8.
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Affiliation(s)
- Gang Chen
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China. .,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China. .,Liver Cancer Institute, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China.
| | - Yi Wang
- Division of Preventive Medicine, School of Public Health and Management, Wenzhou Medical University, Wenzhou, 325005, China
| | - Xin Zhao
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, 215006, China
| | - Xiao-Zai Xie
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Jun-Gang Zhao
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Tuo Deng
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Zi-Yan Chen
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Han-Bin Chen
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Yi-Fan Tong
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Zhen Yang
- Department of Infectious Diseases, Shandong Provincial Hospital affiliated to Shandong University, Jinan, 250021, China
| | - Xi-Wei Ding
- Department of Gastroenterology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, 210008, Jiangsu, China
| | - Peng-Yi Guo
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Hai-Tao Yu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Li-Jun Wu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Si-Na Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Qian-Dong Zhu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Jun-Jian Li
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Yun-Feng Shan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Fu-Xiang Yu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Zheng-Ping Yu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, 325005, China.,Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China
| | - Jing-Lin Xia
- Key Laboratory of Diagnosis and Treatment of Severe Hepato-Pancreatic Diseases of Zhejiang Province, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China. .,Liver Cancer Institute, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325005, China. .,Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai, 200032, China.
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9
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Lu Q, Zhang H, Dong XY, Liu HM, Jiang YM, Zou YX, Shen YM, Zhao DY, Chen HB, Ai T, Liu CG, Shen ZB, Yang JM, Zheng YJ, Chen YS, Chen WG, Zhu YF, Zhang CL, Tian LJ, Wu GR, Li L, Zheng AB, Gu M, Wei YY, Wei LM. [Consistency of peripheral whole blood and venous serum procalcitonin in children: a multicenter parallel controlled study]. Zhonghua Er Ke Za Zhi 2021; 59:471-477. [PMID: 34102820 DOI: 10.3760/cma.j.cn112140-20210224-00153] [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 explore the consistency of peripheral whole blood and venous serum procalcitonin (PCT) levels, and the value of peripheral whole blood PCT in evaluating pediatric bacterial infection. Methods: This multicenter cross-sectional parallel control study was conducted in 11 children's hospital. All the 1 898 patients older than 28 days admitted to these hospitals from March 2018 to February 2019 had their peripheral whole blood and venous serum PCT detected simultaneously with unified equipment, reagent and method. According to the venous serum PCT level, the patients were stratified to subgroups. Analysis of variance and chi-square test were used to compare the demographic characteristics among groups. And the correlation between the peripheral blood and venous serum PCT level was investigated by quantitative Pearson correlation analysis.The PCT resultes were also converted into ranked data to further test the consistency between the two sampling methods by Spearman's rank correlation test. Furthermore, the ranked data were converted into binary data to evaluate the consistency and investigate the best cut-off of peripheral blood PCT level in predicting bacterial infection. Results: A total of 1 898 valid samples were included (1 098 males, 800 females),age 27.4(12.2,56.7) months. There was a good correlation between PCT values of peripheral whole blood and venous serum (r=0.97, P<0.01). The linear regression equation was PCTvenous serum=0.135+0.929×PCTperipheral whole blood. However, when stratified to 5 levels, PCT results showed diverse and unsatisfied consistency between the two sampling methods (r=0.51-0.92, all P<0.01). But after PCT was converted to ordinal categorical variables, the stratified analysis showed that the coincidence rate of the measured values by the two sampling methods in each boundary area was 84.9%-97.1%. The dichotomous variables also showed a good consistency (coincidence rate 96.8%-99.3%, Youden index 0.82-0.89). According to the severity of disease, the serum PCT value was classified into 4 intervals(<0.5、0.5-<2.0、2.0-<10.0、≥10.0 μg/L), and the peripheral blood PCT value also showed a good predictive value (AUC value was 0.991 2-0.997 9). The optimal cut points of peripheral whole blood PCT value 0.5、1.0、2.0、10.0 μg/L corresponding to venous serum PCT values were 0.395, 0.595, 1.175 and 3.545 μg/L, respectively. Conclusions: There is a good correlation between peripheral whole blood PCT value and the venous serum PCT value, which means that the peripheral whole blood PCT could facilitate the identification of infection and clinical severity. Besides, the sampling of peripheral whole blood is simple and easy to repeat.
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Affiliation(s)
- Q Lu
- Department of Pulmonology, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, China
| | - H Zhang
- Clinical Laboratory, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, China
| | - X Y Dong
- Department of Pulmonology, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200062, China
| | - H M Liu
- Department of Pediatric Pulmonology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Y M Jiang
- Clinical Laboratory, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Y X Zou
- Department of the Second Respiratory, Tianjin Children's Hospital, Tianjin 300134, China
| | - Y M Shen
- Clinical Laboratory, Tianjin Children's Hospital, Tianjin 300074, China
| | - D Y Zhao
- Department of Pulmonology, Nanjing Children's Hospital Affiliated to Nanjing Medical University, Nanjing 210008, China
| | - H B Chen
- Clinical Laboratory, Nanjing Children's Hospital Affiliated to Nanjing Medical University, Nanjing 210008, China
| | - T Ai
- Department of Pulmonology, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - C G Liu
- Clinical Laboratory, Chengdu Women's and Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu 611731, China
| | - Z B Shen
- Department of Pulmonology, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou 450053, China
| | - J M Yang
- Clinical Laboratory, Children's Hospital Affiliated to Zhengzhou University, Zhengzhou 450053, China
| | - Y J Zheng
- Department of Pulmonology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - Y S Chen
- Clinical Laboratory, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - W G Chen
- Department of Clinical Laboratory, the Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, China
| | - Y F Zhu
- Department of Clinical Laboratory, the Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, China
| | - C L Zhang
- Department of Pulmonology, Xuzhou Children's Hospital, Xuzhou Medical University, Xuzhou 221006, China
| | - L J Tian
- Clinical Laboratory, Xuzhou Children's Hospital, Xuzhou Medical University, Xuzhou 221006, China
| | - G R Wu
- Department of Clinical Laboratory, Wuxi Children's Hospital, Wuxi 214023, China
| | - L Li
- Department of Pulmonology, Wuxi Children's Hospital, Wuxi 214023, China
| | - A B Zheng
- Department of Education and Research, Changzhou Children's Hospital Affiliated to Nantong University, Nantong 213003, China
| | - M Gu
- Department of Pulmonology, Changzhou Children's Hospital Affiliated to Nantong University, Nantong 213003, China
| | - Y Y Wei
- Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - L M Wei
- Department of Biostatistics, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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10
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Ma B, Ma XY, Zhang Y, Chen HB, Wang Q, Li LH. [Prediction of suitable habitats of Ixodes persulcatus in China]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:169-176. [PMID: 34008364 DOI: 10.16250/j.32.1374.2020244] [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: 11/27/2022]
Abstract
OBJECTIVE To evaluate the effects of environmental factors the distribution of Ixodes persulcatus, and to predict the future suitable habitats of I. persulcatus in China. METHODS The known distribution sites of I. persulcatus in China were captured from national and international published literatures. The effects of 14 environmental factors on the distribution of I. persulcatus were examined using the Jackknife test, including mean annual temperature, mean monthly temperature range, isothermality, temperature seasonality, maximum temperature of the warmest month, minimum temperature of the coldest month, temperature annual range, mean temperature of the wettest quarter, mean temperature of the driest quarter, mean temperature of the wet-test quarter, mean temperature of the coldest quarter, annual mean precipitation, precipitation of the wettest month, precipitation of the driest month, precipitation seasonality, precipitation of the wettest quarter, precipitation of the driest quarter, precipitation of the warmest quarter, precipitation of the coldest quarter, elevation, slope, aspect and vegetation. The suitable habitats of I. persulcatus were predicted in China using the maximum entropy model and ArcGIS 10.7 software with the environmental factors. RESULTS Currently, the highly suitable habitats of I. persulcatus covered an area of 886 600 km2 in China, which were predominantly located in northeastern China. The environmental factors that contributed more than 10% to the distribution of the suitable habitats of I. persulcatus in China included annual temperature variation range (39.1%), the coldest quarterly precipitation (23.2%), and the annual mean precipitation (11.9%). Based on the maximum entropy model, the suitable habitats of I. persulcatus were predicted to show a shrinking tendency towards northeastern China in 2070. CONCLUSIONS The suitable habitat of I. persulcatus strongly correlates with temperature and precipitation, and climate and environmental changes may lead to shrinking of the future suitable habitat of I. persulcatus in China.
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Affiliation(s)
- B Ma
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
| | - X Y Ma
- Shengli Oilfield Central Hospital, China
| | - Y Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, China
| | - H B Chen
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
| | - Q Wang
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
| | - L H Li
- School of Public Health and Management, Weifang Medical University, Weifang 261053, China
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11
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Li QP, Dou YX, Huang ZW, Chen HB, Li YC, Chen JN, Liu YH, Huang XQ, Zeng HF, Yang XB, Su ZR, Xie JH. Therapeutic effect of oxyberberine on obese non-alcoholic fatty liver disease rats. Phytomedicine 2021; 85:153550. [PMID: 33831691 DOI: 10.1016/j.phymed.2021.153550] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/06/2021] [Accepted: 03/12/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Berberine (BBR) has been widely used to treat non-alcoholic fatty liver disease (NAFLD). The metabolites of BBR were believed to contribute significantly to its pharmacological effects. Oxyberberine (OBB), a gut microbiota-mediated oxidative metabolite of BBR, has been firstly identified in our recent work. PURPOSE Here, we aimed to comparatively investigate the anti-NAFLD properties of OBB and BBR. METHODS The anti-NAFLD effect was evaluated in high-fat diet-induced obese NAFLD rats with biochemical/ELISA tests and histological staining. The related gene and protein expressions were detected by qRT-PCR and Western blotting respectively. Molecular docking and dynamic simulation were also performed to provide further insight. RESULTS Results indicated OBB remarkably and dose-dependently attenuated the clinical manifestations of NAFLD, which (100 mg/kg) achieved similar therapeutic effect to metformin (300 mg/kg) and was superior to BBR of the same dose. OBB significantly inhibited aberrant phosphorylation of IRS-1 and up-regulated the downstream protein expression and phosphorylation (PI3K, p-Akt/Akt and p-GSK-3β/GSK-3β) to improve hepatic insulin signal transduction. Meanwhile, OBB treatment remarkably alleviated inflammation via down-regulating the mRNA expression of MCP-1, Cd68, Nos2, Cd11c, while enhancing Arg1 mRNA expression in white adipose tissue. Moreover, OBB exhibited closer affinity with AMPK in silicon and superior hyperphosphorylation of AMPK in vivo, leading to increased ACC mRNA expression in liver and UCP-1 protein expression in adipose tissue. CONCLUSION Taken together, compared with BBR, OBB was more capable of maintaining lipid homeostasis between liver and WAT via attenuating hepatic insulin pathway and adipocyte inflammation, which was associated with its property of superior AMPK activator.
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Affiliation(s)
- Qiao-Ping Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Yao-Xing Dou
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Zi-Wei Huang
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Han-Bin Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, SAR, PR China
| | - Yu-Cui Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Jian-Nan Chen
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Yu-Hong Liu
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Xiao-Qi Huang
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Hui-Fang Zeng
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Xiao-Bo Yang
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China
| | - Zi-Ren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China.
| | - Jian-Hui Xie
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China; Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou 510120, PR China.
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12
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Chen HB, Luo CD, Ai GX, Wang YF, Li CL, Tan LH, Lee SMY, Cheung AKK, Su ZR, Wu XL, Xie JH, Zeng HF. A comparative investigation of the interaction and pharmacokinetics of hemoglobin with berberine and its oxymetabolite. J Pharm Biomed Anal 2021; 199:114032. [PMID: 33774454 DOI: 10.1016/j.jpba.2021.114032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 03/17/2021] [Accepted: 03/18/2021] [Indexed: 10/21/2022]
Abstract
Berberine (BBR), isolated from Coptis chinensis, is one type of isoquinoline alkaloids. BBR exerts numerous of bioactivities but the plasma concentration is really low. In our previous study, a new oxymetabolite (OBB) has been discovered and showed superior anti-inflammatory effect comparing with BBR. The aim of this study is to investigate the interaction, metabolite and pharmacokinetics of BBR with hemoglobin. Sprague-Dawley rats were used to carry out the interaction, metabolite and pharmacokinetics of BBR and OBB in vivo. Fluorescence spectra were used to analyse the interaction in vitro. Results showed that OBB could be generated after intravenous injection or incubating with BBR in vitro and in vivo; Both BBR and OBB exerted much stronger binding interaction with hemoglobin than plasma and affect the conformation of bovine hemoglobin and change the fluorescence spectral properties; BBR and OBB were mainly presented and transported in the proteins-bound form. These results provide a new insight to understand the dynamic equilibrium of BBR and OBB within body from the perspective of new metabolic pathways.
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Affiliation(s)
- Han-Bin Chen
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510405, People's Republic of China; State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, People's Republic of China; Muscle Physiology Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China
| | - Chao-Dan Luo
- Guangxi Institute of Subtropical Agricultural Products Processing, Guangxi Subtropical Crops Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, 530001, People's Republic of China; School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Gao-Xiang Ai
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Yong-Fu Wang
- First School of Clinical Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510120, People's Republic of China
| | - Cai-Lan Li
- Department of Pharmacology, Zunyi Medical University, Zhuhai Campus, Zhuhai, 519041, People's Republic of China
| | - Li-Hua Tan
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Simon Ming-Yuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau, People's Republic of China
| | - Alex Kwok-Kuen Cheung
- Muscle Physiology Laboratory, Department of Rehabilitation Sciences, The Hong Kong Polytechnic University, Hong Kong, People's Republic of China
| | - Zi-Ren Su
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, 510006, People's Republic of China
| | - Xiao-Li Wu
- School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, 510006, People's Republic of China.
| | - Jian-Hui Xie
- The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, People's Republic of China; State Key Laboratory of Dampness Syndrome of Chinese Medicine, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, 510120, People's Republic of China; Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, Guangzhou, 510120, People's Republic of China.
| | - Hui-Fang Zeng
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510405, People's Republic of China.
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Ye ZQ, Chen HB, Zhang TY, Chen Z, Tian L, Gu DN. MicroRNA-7 modulates cellular senescence to relieve gemcitabine resistance by targeting PARP1/NF-κB signaling in pancreatic cancer cells. Oncol Lett 2020; 21:139. [PMID: 33552258 PMCID: PMC7798037 DOI: 10.3892/ol.2020.12400] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 11/11/2020] [Indexed: 11/28/2022] Open
Abstract
Senescence is activated in response to gemcitabine to prevent the propagation of cancer cells. However, there is little evidence on whether senescence is involved in gemcitabine resistance in pancreatic cancer. Increasing evidence has demonstrated that microRNAs (miRs) are potential regulators of cellular senescence. The present study aimed to investigate whether aberrant miR-7 expression modulated senescence to influence pancreatic cancer resistance to chemotherapy. In the present study, cell senescence assay, ALDEFLUOR™ assay, luciferase reporter assay, flow cytometry, quantitative PCR, immunohistochemistry and western blot analysis were performed to explore the association between senescence and gemcitabine therapy response, and to clarify the underlying mechanisms. The present study revealed that gemcitabine-induced chronically existing senescent pancreatic cells possessed stemness markers. Therapy-induced senescence led to gemcitabine resistance. Additionally, it was found that miR-7 expression was decreased in gemcitabine-resistant pancreatic cancer cells, and that miR-7 acted as an important regulator of cellular senescence by targeting poly (ADP-ribose) polymerase 1 (PARP1)/NF-κB signaling. When miR-7 expression was restored, it was able to sensitize pancreatic cancer cells to gemcitabine. In conclusion, the present study demonstrated that miR-7 regulated cellular senescence and relieved gemcitabine resistance by targeting the PARP1/NF-κB axis in pancreatic cancer cells.
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Affiliation(s)
- Zhi-Qiang Ye
- Department of Thyroid and Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Han-Bin Chen
- Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Tai-Yu Zhang
- Institute of Translational Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 201620, P.R. China
| | - Zhi Chen
- Department of Chemoradiotherapy, The Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
| | - Ling Tian
- Department of Central Laboratory, Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200030, P.R. China
| | - Dian-Na Gu
- Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, P.R. China
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Shang WJ, Shu LM, Zhou X, Liao HQ, Chen XH, Hong H, Chen HB. Association of FLAIR vascular hyperintensity and acute MCA stroke outcome changes with the severity of leukoaraiosis. Neurol Sci 2020; 41:3209-3218. [PMID: 32372196 DOI: 10.1007/s10072-020-04411-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Accepted: 04/11/2020] [Indexed: 10/24/2022]
Abstract
PURPOSE The clinical significance of FLAIR vascular hyperintensity (FVH), a marker of collateral circulation in ischaemic stroke, remains controversial. We hypothesised that the association between FVH and outcomes varies with the severity of leukoaraiosis (LA), another marker of collaterals, and that their combined significance may vary with time. METHODS We included 459 consecutive patients with middle cerebral artery (MCA) stroke. Proximal and distal FVHs were distinguished based on location. LA was divided into two grades, according to Fazekas scores of 0-2 and 3-6. Symptom-to-MRI time was divided into two categories: ≤ 14 days and ≥ 15 days. RESULTS We found no difference in FVH proportion according to LA grade. Multivariate analysis revealed that LA and FVH status were independently associated with unfavourable outcomes (modified Rankin scale ≥ 2) in patients with symptom-to-MRI times ≤ 14 days (P = 0.008), but not in those with symptom-to-MRI times ≥15 days (P = 0.61). In the group with symptom-to-MRI times ≤14 days, patients with LA 3-6 and FVH(+) (OR, 3.044; 95% CI, 1.116-8.305) were more likely to have unfavourable clinical outcomes compared with patients with LA 0-2 and FVH(+) but not compared with those with LA 0-2 and FVH(-) or LA 3-6 and FVH(-). In addition, FVH location did not influence the relationship between FVH and outcomes. CONCLUSIONS The association between FVH and outcomes was influenced by the degree of LA in the acute but not in the subacute and chronic stages of MCA infarction. FVH predicts clinical outcomes independently only in those with more extensive LA.
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Affiliation(s)
- W J Shang
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong Province, China
| | - L M Shu
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong Province, China.,Department of Neurology, The Seventh Affiliated Hospital, Sun Yat-sen University, NO. 628 Zhenyuan Road, Shenzhen, 518107, China
| | - X Zhou
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-Sen University, No. 2nd Zhongshan Road, Guangzhou, 510080, China
| | - H Q Liao
- Department of Neurology, The Seventh Affiliated Hospital, Sun Yat-sen University, NO. 628 Zhenyuan Road, Shenzhen, 518107, China
| | - X H Chen
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong Province, China
| | - H Hong
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong Province, China
| | - H B Chen
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong Province, China.
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15
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Liu PL, Cheng ZX, Lu MP, Zhang LQ, Chen HB. [Misdiagnosis analysis: 120 patients with nasal extranodal NK/T cell lymphoma in head and neck]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2020; 34:73-78. [PMID: 32086904 PMCID: PMC10128589 DOI: 10.13201/j.issn.1001-1781.2020.01.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Indexed: 11/12/2022]
Abstract
Objective:The Clinicopathological characteristics and the reason of misdiagnosis about nasal extranodal NK/T cell lymphoma in head and neck(ENKTL) are analysised to raise awareness and reduce misdiagnosis. Method:One hundred and twenty patients with ENKTL, diagnosed pathologically in head and neck from May 2010 to April 2018, were analyzed retrospectively. All cases were divided into misdiagnosed group and non-misdiagnosed group according to whether there were misdiagnosis and mistreatment before diagnosis. The differences of clinicopathological characteristics between the two groups before and after diagnosis were compared. The differences of overall survival(OS) between the two groups after treatment were also compared. Result:The misdiagnosis rate of this study was 71.7%, and they were misdiagnosed as sinusitis, nasal polyps, upper respiratory tract infection and so on. On the whole, the 1-year OS, 3-year OS and 5-year OS were 77.8%, 65.9% and 49.3% respectively. There was no significant difference in sex, age, first symptom, initial site, B symptom, superficial lymph node enlargement and weight loss between two groups before diagnosis(P>0.05), however, there were significant differences in relative specific signs, hospital grade and time from first visit to definite diagnosis(P<0.05). The proportion of the high-level hospitals in the first visit hospital was significantly lower than that in the non-misdiagnosed group, while the time from the first visit to the final diagnosis was significantly longer than that in the non-misdiagnosed group. There was no significant difference in international prognostic index(IPI) score, expression of Ki-67, therapeutic schedule, chemotherapy regimen for patients receiving chemotherapy, and radiation dose for patients receiving radiotherapy after diagnosis between the two groups(P>0.05), but there was a significant difference in the clinical stages of Ann Arbor between the two groups(P<0.05). The clinical staging of the misdiagnosed group was later than that of the non-misdiagnosed group. The 1-year OS, 3-year OS and 5-year OS were 73.6%, 59.3% and 43.2% in the misdiagnosed group respectively, and 88.2%, 82.4% and 64.2% in the non-misdiagnosed group respectively. The overall survival rate in the misdiagnosis group was lower than that in the non-misdiagnosed group, and the overall survival time was lower than that in the non-misdiagnosed group. However, there was no significant difference in the overall survival rates between the early stage(Ⅰ and Ⅱ) and the advanced stage(Ⅲ and Ⅳ) of Ann Arbor(P>0.05). Conclusion:The non-specific clinical and the complexity of pathological features of ENKTL in head and neck might cause misdiagnosis, which leads to prolonged time from first visit to definite diagnosis, thus results in disease progression, and ultimately may lead to decreased overall survival rate. To avoid the misdiagnosis and early diagnosis is very important.
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Affiliation(s)
- P L Liu
- Department of Otolaryngology,the Affiliated Hospital of Yangzhou University,Yangzhou,225001,China
| | - Z X Cheng
- Department of Otolaryngology,the Affiliated Hospital of Yangzhou University,Yangzhou,225001,China
| | - M P Lu
- Department of Otolaryngology,the First Affiliated Hospital of Nanjing Medical University
| | - L Q Zhang
- Department of Otolaryngology,the First Affiliated Hospital of Nanjing Medical University
| | - H B Chen
- Department of Otolaryngology,the First Affiliated Hospital of Nanjing Medical University
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Wei QC, Ye SF, Wang YP, Ding SY, Qian NJ, Liu YH, Chen HB, Wu L, Pan XH. [Brugada syndrome with complete right bundle branch block successfully treated with low dose quinidine: a case report]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:154-156. [PMID: 32135617 DOI: 10.3760/cma.j.issn.0253-3758.2020.02.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Q C Wei
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
| | - S F Ye
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
| | - Y P Wang
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
| | - S Y Ding
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
| | - N J Qian
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
| | - Y H Liu
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
| | - H B Chen
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
| | - L Wu
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - X H Pan
- Department of Cardiology, Second Affiliated Hospital, Medical Collage of Zhejiang University, Hangzhou 310009, China
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Ye ZQ, Zou CL, Chen HB, Lv QY, Wu RQ, Gu DN. Folate-conjugated herpes simplex virus for retargeting to tumor cells. J Gene Med 2020; 22:e3177. [PMID: 32096291 DOI: 10.1002/jgm.3177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/13/2020] [Accepted: 02/19/2020] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Herpes simplex virus type 1 (HSV-1)-mediated oncolytic therapy is a promising cancer treatment modality. However, viral tropism is considered to be one of the major stumbling blocks to the development of HSV-1 as an anticancer agent. METHODS The surface of oncolytic HSV-1 G207 was covalently modified with folate-poly (ethylene glycol) conjugate (FA-PEG). The specificities and tumor targeting efficiencies of modified or unmodified G207 particles were analyzed by a real-time polymerase chain reaction at the level of cell attachment and entry. Immune responses were assessed by an interleukin-6 release assay from RAW264.7 macrophages. Biodistribution and in vivo antitumoral activity after intravenous delivery was evaluated in BALB/c nude mice bearing subcutaneous KB xenograft tumors. RESULTS FA-PEG-HSV exhibited enhanced targeting specificity for folate receptor over-expressing tumor cells and had lower immunogenicity than the unmodified HSV. In vivo, the FA-PEG-HSV group revealed an increased anti-tumor efficiency and tumor targeting specificity compared to the naked HSV. CONCLUSIONS These results indicate that folate-conjugated HSV G207 presents a folate receptor-targeted oncolytic virus with a potential therapeutic value via retargeting to tumor cells.
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Affiliation(s)
- Zhi-Qiang Ye
- Department of Thyroid and Breast Surgery, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang, China
| | - Chang-Lin Zou
- Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang, China
| | - Han-Bin Chen
- Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang, China
| | - Qi-Yuan Lv
- Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang, China
| | - Ruo-Qi Wu
- Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang, China
| | - Dian-Na Gu
- Department of Chemoradiotherapy, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang, China
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Shang WJ, Chen HB, Shu LM, Liao HQ, Huang XY, Xiao S, Hong H. The Association between FLAIR Vascular Hyperintensity and Stroke Outcome Varies with Time from Onset. AJNR Am J Neuroradiol 2019; 40:1317-1322. [PMID: 31371355 DOI: 10.3174/ajnr.a6142] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Accepted: 06/17/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE FLAIR vascular hyperintensity has been recognized as a marker of collaterals in ischemic stroke, but the impact on outcome is still controversial. We hypothesized that the association between FLAIR vascular hyperintensity and outcome varies with time. MATERIALS AND METHODS We included 459 consecutive patients with middle cerebral artery stroke and divided them into 3 groups by symptom-to-MR imaging time (group 1, ≤7 days; group 2, 8-14 days; group 3, ≥15 days). The FLAIR vascular hyperintensity score, ranging from 0 to 3 points, was based on territory distributions of different MCA segments. The associations between FLAIR vascular hyperintensity and outcome with time were analyzed qualitatively and quantitatively. RESULTS No patients underwent MR imaging within 6 hours of onset. The proportion of FLAIR vascular hyperintensity (+) and severe stenosis or occlusion of MCA was not significantly dependent on time. In groups 1 and 2, FLAIR vascular hyperintensity (+) was significantly associated with larger lesions, the prevalence of flow injury, and unfavorable outcome (mRS ≥ 2). There were no such associations in group 3. Multiple logistic regressions demonstrated that FLAIR vascular hyperintensity (+) was an independent risk factor for unfavorable outcome in group 2. Infarction volume tended to increase with the increase of the distal FLAIR vascular hyperintensity score in groups 1 and 2, while declining in group 3. CONCLUSIONS FLAIR vascular hyperintensity is associated with unfavorable outcome within 6 hours to 14 days of onset, while the wider distribution of distal FLAIR vascular hyperintensity may be favorable beyond 14 days of onset in MCA infarction. Symptom-to-MR imaging time should be considered when assessing the prognostic value of FLAIR vascular hyperintensity.
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Affiliation(s)
- W J Shang
- From the Department of Neurology (W.J.S., H.B.C., L.M.S., S.X., H.H.), National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - H B Chen
- From the Department of Neurology (W.J.S., H.B.C., L.M.S., S.X., H.H.), National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - L M Shu
- From the Department of Neurology (W.J.S., H.B.C., L.M.S., S.X., H.H.), National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Neurology (L.M.S., H.Q.L., X.Y.H.), The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - H Q Liao
- Department of Neurology (L.M.S., H.Q.L., X.Y.H.), The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - X Y Huang
- Department of Neurology (L.M.S., H.Q.L., X.Y.H.), The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - S Xiao
- From the Department of Neurology (W.J.S., H.B.C., L.M.S., S.X., H.H.), National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - H Hong
- From the Department of Neurology (W.J.S., H.B.C., L.M.S., S.X., H.H.), National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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Gong XY, Chen ZW, Lin ZP, Chen HB, Cheng L, Chen X. [Therapeutic effect of low-temperature radiofrequency coblation on early-stage laryngeal cancer]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:143-147. [PMID: 30808140 DOI: 10.13201/j.issn.1001-1781.2019.02.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Indexed: 11/12/2022]
Abstract
Objective: To evaluate the safety,efficacy and prognosis of low-temperature plasma radiofrequency coblation for early-stage laryngeal cancer(Tis, T1 and T2). Method: A retrospective analysis of 202 patients with early-stage laryngeal cancer who underwent the low-temperature radiofrequency coblation surgery, including 34 cases of Tis(16.83%), 49 cases of stage T1aN0M0(24.26%), 50 cases of stage T1bN0M0(24.75%) and 69 cases of stage T2N0M0(34.16%). Surgical patients were followed up closely for 6 to 60 months, with a median follow-up of 29 months. Result: Of the 202 patients,165(81.68%) had no recurrence and achieved good surgical results. None of them suffered severe complications such as post-operative hemorrhage and asphyxia. 37 cases(18.32%) had recurrence, including 1 case(0.50%) in stage Tis, 7 cases(3.47%) in stage T1a,7 cases(3.47%) in stage T1b, and 22 cases(10.89%) in stage T2. Thirteen patients who had recurrence underwent total laryngectomy(5 of which had a recurrence of T3 and 8 of which progressed to T4), including 1 in the stage T1a,2 in the stage T1b, and 10 in the stage T2. Vertical hemilaryngectomy were performed in 4 cases, 3 cases of stage T1a and 1 case of stage T2; 5 cases underwent plasma radiofrequency coblation again, including 3 cases of stage T1b and 2 cases of stage T2,no recurrence was found in all the patients; 1 patient had no obvious recurrence in the larynx but had cervical lymph node metastasis, radical neck dissection was performed; 1 patient with stage T2 recurrence was treated with a tracheotomy to relieve laryngeal obstruction without further treatment;3 cases showed improvement by radiotherapy and chemotherapy treatment after recurrence; 9 death cases,5 patients died after radiotherapy and chemotherapy, and 4 patients stopped getting treatment after recurrence.Conclusion: Low-temperature radiofrequency coblation surgery for patients with early-stage laryngeal cancer has great advantages in the preservation of laryngeal function and reduction of surgical trauma after surgery compared with traditional surgical method, and can obtain satisfactory results, but the selection of surgical indications for some patients with clinical stage T2 is still need to be carefully considered..
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Affiliation(s)
- X Y Gong
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - Z W Chen
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - Z P Lin
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - H B Chen
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - L Cheng
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - X Chen
- Department of Otorhinolaryngology, the First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
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Li CL, Tan LH, Wang YF, Luo CD, Chen HB, Lu Q, Li YC, Yang XB, Chen JN, Liu YH, Xie JH, Su ZR. Comparison of anti-inflammatory effects of berberine, and its natural oxidative and reduced derivatives from Rhizoma Coptidis in vitro and in vivo. Phytomedicine 2019; 52:272-283. [PMID: 30599908 DOI: 10.1016/j.phymed.2018.09.228] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 09/10/2018] [Accepted: 09/28/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Berberine (BBR) is the most abundant and major active constituent of Rhizoma Coptidis (RC), which has been widely used to treat inflammatory diseases in traditional oriental medicine. Despite BBR has been found to exhibit pronounced anti-inflammatory effect, the anti-inflammatory activities of its natural derivatives were sparsely dissected out. PURPOSE To comparatively investigate the anti-inflammatory potential of BBR, and its natural oxoderivative (oxyberberine, OBB) and reduced derivative (dihydroberberine, DHBB) in vitro and in vivo, and delineate the possible underlying mechanism. METHODS LC-MS/MS was used to identify the natural derivatives of BBR in RC. The potential anti-inflammatory properties of BBR and its natural derivatives were comparatively evaluated in vitro by lipopolysaccharide (LPS)-induced RAW264.7 macrophages cells, and in vivo via three typical acute inflammation murine models. Some important inflammation-related molecules were analyzed by ELISA, qRT-PCR and Western blotting. RESULTS LC-MS/MS led to the identification of BBR, OBB and DHBB in RC ethyl acetate extract. The in vitro assay indicated that BBR, OBB and DHBB (1.25, 2.5 and 5 μM) pretreatment significantly decreased the levels of pro-inflammatory cytokines tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), interleukin-6 (IL-6), prostaglandinE2 (PGE2) and nitricoxide (NO), and inhibited the mRNA expressions of cyclooxygenase-2 (COX-2) and inducible nitricoxide synthase (iNOS) in a dose-dependent manner, with relative efficiency of OBB > BBR > DHBB. Furthermore, OBB, BBR and DHBB remarkably inhibited the phosphorylation of nuclear factor-κB (NF-κB) p65 and inhibitory kappa Bα (IκBα). In vivo, BBR (20 mg/kg) and OBB (5, 10, and 20 mg/kg) pretreatment significantly ameliorated the xylene-induced ear edema, carrageenan-stimulated paw edema, and acetic acid-elicited vascular permeability in mice in a dose-dependent manner, with OBB exhibiting superior anti-inflammatory effect at the same dose (20 mg/kg). Histopathological analysis indicated that OBB and BBR could markedly attenuate the inflammatory deterioration and decrease the cellular infiltration in paw tissues. Additionally, the carrageenan-induced increases in TNF-α, IL-6, IL-1β, PGE2 and NO productions, and COX-2 and iNOS mRNA expressions were effectually and concentration-dependently suppressed by OBB and BBR pretreatment. CONCLUSION The anti-inflammatory activity of BBR and its natural derivatives was in the order of OBB > BBR > DHBB. OBB was for the first time found to be endowed with pronounced anti-inflammatory property, which was probably associated with suppressing the activation of NF-κB signaling pathway, and the subsequent gene expressions and productions of pro-inflammatory mediators. The results might contribute to illuminating the pharmacodynamic underpinnings of RC and provide evidence for developing OBB as a safe and promising natural lead compound in inflammation treatment.
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Affiliation(s)
- Cai-Lan Li
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Li-Hua Tan
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Yong-Fu Wang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Chao-Dan Luo
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Han-Bin Chen
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, PR China
| | - Qiang Lu
- Key Laboratory of Chinese Medicinal Resource from Lingnan, Ministry of Education, Research Center of Chinese Herbal Resource Science and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Yu-Cui Li
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Xiao-Bo Yang
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China
| | - Jian-Nan Chen
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Yu-Hong Liu
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China
| | - Jian-Hui Xie
- Guangdong Provincial Key Laboratory of Clinical Research on Traditional Chinese Medicine Syndrome, The Second Affiliated Hospital, Guangzhou University of Chinese Medicine, Guangzhou 510120, PR China.
| | - Zi-Ren Su
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, PR China.
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Ma Q, Yang DR, Xue BX, Wang C, Chen HB, Dong Y, Wang CS, Shan YX. Transrectal real-time tissue elastography targeted biopsy coupled with peak strain index improves the detection of clinically important prostate cancer. Oncol Lett 2017; 14:210-216. [PMID: 28693155 PMCID: PMC5494937 DOI: 10.3892/ol.2017.6126] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 01/10/2017] [Indexed: 12/31/2022] Open
Abstract
The focus of the present study was to evaluate transrectal real-time tissue elastography (RTE)-targeted two-core biopsy coupled with peak strain index for the detection of prostate cancer (PCa) and to compare this method with 10-core systematic biopsy. A total of 141 patients were enrolled for evaluation. The diagnostic value of peak strain index was assessed using a receiver operating characteristic curve. The cancer detection rates of the two approaches and corresponding positive cores and Gleason score were compared. The cancer detection rate per core in the RTE-targeted biopsy (44%) was higher compared with that in systematic biopsy (30%). The peak strain index value of PCa was higher compared with that of the benign lesion. PCa was detected with the highest sensitivity (87.5%) and specificity (85.5%) using the threshold value of a peak strain index of ≥5.97 with an area under the curve value of 0.95. When the Gleason score was ≥7, RTE-targeted biopsy coupled with peak strain index detected 95.6% of PCa cases, but 84.4% were detected using systematic biopsy. Peak strain index as a quantitative parameter may improve the differentiation of PCa from benign lesions in the prostate peripheral zone. Transrectal RTE-targeted biopsy coupled with peak strain index may enhance the detection of clinically significant PCa, particularly when combined with systematic biopsy.
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Affiliation(s)
- Qi Ma
- Department of Ultrasound, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Dong-Rong Yang
- Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Bo-Xin Xue
- Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Cheng Wang
- Department of Ultrasound, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Han-Bin Chen
- Department of Ultrasound, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Yun Dong
- Department of Pathology, Wuxi Affiliated Hospital of Nanjing University of Chinese Medicine, Wuxi, Jiangsu 214071, P.R. China
| | - Cai-Shan Wang
- Department of Ultrasound, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
| | - Yu-Xi Shan
- Department of Urology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, P.R. China
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Yao YN, Huang P, Chen HB, Zhang L, Chen MZ, Yu RB. [Related factors for severe liver fibrosis in chronic hepatitis C patients with remunerated blood donation history in Jurong of Jiangsu province]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 38:49-52. [PMID: 28100376 DOI: 10.3760/cma.j.issn.0254-6450.2017.01.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: The incidence of liver fibrosis in patients with chronic hepatitis C is high. Without effective treatment, it would lead to liver cirrhosis. This study is to identify the related factors for the incidence of liver fibrosis in patients with chronic hepatitis C in order to make early intervention treatment and reduce the case fatality rate. Methods: This cross-sectional survey was conducted in adults aged ≥50 years with local residence for more than 5 years in Jurong of Jiangsu province from March to May in 2015, the patients infected with hepatitis C virus through remunerated blood donation were screened and included in the analysis. Descriptive statistical analysis was done to compare the differences in the incidence of liver fibrosis among the patients with different age, sex and education level or co-infected with hepatitis B virus or not. The risk factors for severe liver fibrosis were identified with univariate and multivariate logistic regression analysis. Liver fibrosis was diagnosed by using FIB-4 index method. Results: A total of 719 patients with chronic hepatitis C were surveyed. Severe liver fibrosis developed in 285 of the 719 patients, in whom 21.84% was males. Multivariate logistic regression analysis showed that the patients with higher education level (OR=0.65, 95%CI: 0.47-0.90) and with access of antiviral therapy (OR=0.33, 95%CI: 0.22-0.49) had lower risk for severe liver fibrosis, the patients with high fasting blood glucose level (OR=1.80, 95% CI: 1.19-2.77) and abnormal white blood cell count (OR=2.77, 95% CI: 1.95-3.90) had higher risk for severe liver fibrosis. Conclusions: The incidence of severe liver fibrosis in patients with hepatitis C was affected by many factors. Higher education level and antiviral therapy were the protective factors, but high fasting blood glucose level and abnormal white blood cell count were the risk factors.
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Affiliation(s)
- Y N Yao
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - P Huang
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - H B Chen
- Department of Infectious Disease, the Jurong People's Hospital, Jurong 212400, China
| | - L Zhang
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - M Z Chen
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - R B Yu
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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Chen HB, Huang HH, Hsieh AC, Chen HH. A simplification–translation–restoration framework for domain adaptation in statistical machine translation: A case study in medical record translation. COMPUT SPEECH LANG 2017. [DOI: 10.1016/j.csl.2016.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Yang HM, Sun CY, Liang JL, Xu LQ, Zhang ZB, Luo DD, Chen HB, Huang YZ, Wang Q, Lee DYW, Yuan J, Li YC. Supercritical-Carbon Dioxide Fluid Extract from Chrysanthemum indicum Enhances Anti-Tumor Effect and Reduces Toxicity of Bleomycin in Tumor-Bearing Mice. Int J Mol Sci 2017; 18:ijms18030465. [PMID: 28245556 PMCID: PMC5372490 DOI: 10.3390/ijms18030465] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 12/13/2016] [Revised: 02/08/2017] [Accepted: 02/13/2017] [Indexed: 02/06/2023] Open
Abstract
Bleomycin (BLM), a family of anti-tumor drugs, was reported to exhibit severe side effects limiting its usage in clinical treatment. Therefore, finding adjuvants that enhance the anti-tumor effect and reduce the detrimental effect of BLM is a prerequisite. Chrysanthemum indicum, an edible flower, possesses abundant bioactivities; the supercritical-carbon dioxide fluid extract from flowers and buds of C. indicum (CISCFE) have strong anti-inflammatory, anti-oxidant, and lung protective effects. However, the role of CISCFE combined with BLM treatment on tumor-bearing mice remains unclear. The present study aimed to investigate the potential synergistic effect and the underlying mechanism of CISCFE combined with BLM in the treatment of hepatoma 22 (H22) tumor-bearing mice. The results suggested that the oral administration of CISCFE combined with BLM could markedly prolong the life span, attenuate the BLM-induced pulmonary fibrosis, suppress the production of pro-inflammatory cytokines (interleukin-6), tumor necrosis factor-α, activities of myeloperoxidase, and malondiadehyde. Moreover, CISCFE combined with BLM promoted the ascites cell apoptosis, the activities of caspases 3 and 8, and up-regulated the protein expression of p53 and down-regulated the transforming growth factor-β1 by activating the gene expression of miR-29b. Taken together, these results indicated that CISCFE could enhance the anti-cancer activity of BLM and reduce the BLM-induced pulmonary injury in H22 tumor-bearing mice, rendering it as a potential adjuvant drug with chemotherapy after further investigation in the future.
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Affiliation(s)
- Hong-Mei Yang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Chao-Yue Sun
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Jia-Li Liang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Lie-Qiang Xu
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Zhen-Biao Zhang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Dan-Dan Luo
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Han-Bin Chen
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Yong-Zhong Huang
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Qi Wang
- Guangdong New South Artepharm, Co., Ltd., Guangzhou 510006, China.
| | - David Yue-Wei Lee
- Department of McLean Hospital, Harvard Medical School, Belmont, CA 02478-9106, USA.
| | - Jie Yuan
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
- Dongguan Mathematical Engineering Academy of Chinese Medicine, Guangzhou University of Chinese Medicine, Dongguan 523000, China.
| | - Yu-Cui Li
- Guangdong Provincial Key Laboratory of New Drug Development and Research of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
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Chen HB, Zhou JT, Liu YH, Zhang ZB, Zhan YX, Su ZR, Zeng HF. Synthesis of pogostone by one-step. J Asian Nat Prod Res 2017; 19:172-175. [PMID: 27243631 DOI: 10.1080/10286020.2016.1184253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 04/25/2016] [Indexed: 06/05/2023]
Abstract
Pogostone, isolated from Pogostemon cablin, has many biological activities such as potential antibacterial, anticandida, and antifungal. Traditional extraction leads to low output of PO about 17.6 mg/kg from Herba Pogostemonis. The previous literature had reported a synthetic study and the yield had reached 4.48% with strictly controlled reaction conditions. The two methods above cannot meet the large demand of PO; we report a new synthesis method. 4-hydroxy-6-methyl-2-pyrone (1) was added in toluene, with the existence of acylation catalyst 4-dimethylaminopyridine (DMAP), 4-methylvaleric acid (2), and condensing agent dicyclohexylcarbodiimide (DCC), PO was synthesized after the combination of 3-carbon of (1) with 1-OH of (2) in the acylation reaction. The purity had reached 98%, determined by HPLC. The structure was confirmed by spectroscopic methods including infrared, electron ionization mass spectrometry, and nuclear magnetic resonance spectroscopy. PO was totally synthesized in one step including cyclization, with total yield of 27.2%.
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Affiliation(s)
- Han-Bin Chen
- a The First Affiliated Hospital of Chinese Medicine , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
- c Guangdong Provincial Key Laboratory of New Chinese Medicinals Development and Research , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Jiang-Tao Zhou
- b School of Chinese Materia Medica , Guangzhou University of Chinese Medicine , Guangzhou 510006 , China
- c Guangdong Provincial Key Laboratory of New Chinese Medicinals Development and Research , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Yu-Hong Liu
- b School of Chinese Materia Medica , Guangzhou University of Chinese Medicine , Guangzhou 510006 , China
- c Guangdong Provincial Key Laboratory of New Chinese Medicinals Development and Research , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Zhen-Biao Zhang
- b School of Chinese Materia Medica , Guangzhou University of Chinese Medicine , Guangzhou 510006 , China
- c Guangdong Provincial Key Laboratory of New Chinese Medicinals Development and Research , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Ya-Xian Zhan
- b School of Chinese Materia Medica , Guangzhou University of Chinese Medicine , Guangzhou 510006 , China
- c Guangdong Provincial Key Laboratory of New Chinese Medicinals Development and Research , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Zi-Ren Su
- b School of Chinese Materia Medica , Guangzhou University of Chinese Medicine , Guangzhou 510006 , China
- c Guangdong Provincial Key Laboratory of New Chinese Medicinals Development and Research , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
| | - Hui-Fang Zeng
- a The First Affiliated Hospital of Chinese Medicine , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
- c Guangdong Provincial Key Laboratory of New Chinese Medicinals Development and Research , Guangzhou University of Chinese Medicine , Guangzhou 510405 , China
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Chen HB, Li ZH, Hong H, Liu G, Zhang AW, Zhang J, Luo BN, Zeng JS. [The clinical and imaging features of 118 patients with spontaneous cerebral arterial dissections presenting with ischemic stroke]. Zhonghua Nei Ke Za Zhi 2017; 55:366-71. [PMID: 27143186 DOI: 10.3760/cma.j.issn.0578-1426.2016.05.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the clinical and radiologic features of patients with spontaneous cerebral arterial dissections (CADs) presenting with ischemic stroke and to explore the effect of gender and age on those features. METHODS Patients admitted to our stroke center diagnosed as ischemic stroke secondary to CADs from August 2008 to April 2015 were prospectively registered. Patients aged between 15 to 80 years old, who had acute brain infarcts within the territory of a major cerebral artery affected by a dissection confirmed by the neuroradiological examinations, were enrolled in the study. The followings were the exclusion criteria: (1) there were any potential causes for the brain infarcts other than CADs; (2) CADs were the results of a definite cause; (3) the clinical data were incomplete. RESULTS A total of 118 patients were enrolled in the study with the mean age of (44.2±12.8) years old. There were 87 men (73.7%) and 67 patients (56.8%) aged under 45 years old. Smoking (41.5%), hypertension (25.4%) and hypercholesterolemia (21.2%) were the three leading risk factors for stroke. Hypercholesterolemia was more common in the male patients (25.3% vs 9.7%, P=0.021), whereas hypertension (39.2% vs 14.9%, P=0.005) and diabetes (25.5% vs 4.5%, P=0.002) were more common in the patients aged 45 years or older. Headache or neck pain before or at the onset of stroke was more common in the female patients (67.7% vs 34.5%, P=0.002). A total of 71 patients were found with CADs of the anterior circulation, while 47 patients with that of the posterior circulation. The involvement of the intra and extracranial arteries were documented in 59 and 59 patients, respectively. The middle cerebral artery (MCA) was the most common site in the intracranial dissection and more MCA dissections were observed in the male patients (46.3% vs 11.1%, P=0.016). The dissection of intracranial carotid artery was more common in patients aged under 45 years old (38.7% vs 0, P<0.001). Lumen status of CADs often presented as stenosis (43.2%) and occlusion (41.2%), while less aneurysm (5.9%) and aneurysm with stenosis (9.3%) were observed. Aneurysm was found to be more common in patients aged 45 years or older (11.8% vs 1.5%, P=0.042). CONCLUSION Chinese patients with spontaneous CADs presenting with ischemic stroke have unique clinical and imaging features, which correlated with age and gender.
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Affiliation(s)
| | | | | | | | | | | | | | - J S Zeng
- Department of Neurology and Stroke Center, the First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
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Chen MZ, Huang P, Chen HB, Yao YN, Peng ZH, Yu RB. [HCV infection status and risk factors in remunerated blood donors in Jiangsu province]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 37:653-7. [PMID: 27188356 DOI: 10.3760/cma.j.issn.0254-6450.2016.05.013] [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 infection status of HCV in remunerated blood donors and risk factors in Jiangsu province. METHODS A Cross-sectional study was conducted among people aged >50 years. Questionnaires were used to collect the information about their demographic characteristics and risk behaviors, and venous blood samples were collected from them to detect HCV anti-body, HCV-RNA and other biochemical indicators. EpiData and Stata were used for data entry and statistical analysis. RESULTS The overall HCV sero-prevalence rates were 22.55% and 61.05% among remunerated blood donors. Data from multiple stepwise regression analysis showed that alanine aminotransferase(ALT)(adjusted OR=1.38, 95%CI: 1.18-1.62)and aspartate aminotransferase(AST)(adjusted OR=1.30, 95%CI: 1.10-1.54)were associated with the outcomes of HCV infection, and fasting plasma glucose(adjusted OR=1.17, 95%CI: 1.01-1.35)were associated with HCV RNA viral loads. CONCLUSION The prevalence of HCV infection in remunerated blood donors was high, clinical ALT, AST and fasting plasma glucose levels were associated with the risk for HCV infection and HCV RNA viral load.
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Affiliation(s)
- M Z Chen
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - P Huang
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - H B Chen
- Department of Infectious Diseases, the Jurong People's Hospital, Jurong 212400, China
| | - Y N Yao
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - Z H Peng
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
| | - R B Yu
- Department of Epidemiology, School of Public Health, Nanjing Medical University, Nanjing 211166, China
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Liu Q, Chen HB, Luo M, Zheng H. Serum soluble RAGE level inversely correlates with left ventricular hypertrophy in essential hypertension patients. Genet Mol Res 2016; 15:gmr8414. [PMID: 27421025 DOI: 10.4238/gmr.15028414] [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
Soluble receptor for advanced glycation end-products (sRAGE) acts as a decoy to prevent interaction between RAGE and its pro-inflammatory ligands. sRAGE levels have been found to decrease in chronic inflammatory diseases, including hypertension. However, few data have been reported concerning the association between serum sRAGE levels and hypertensive left ventricular hypertrophy (LVH). Fasting blood samples were obtained from 209 essential hypertensive patients, and sRAGE levels were measured using a commercially available double-sandwich enzyme-linked immunosorbent assay kit. All patients underwent complete transthoracic echocardiographic examination. LVH was defined as a left ventricular mass index >115 g/m(2) for men and >95 g/m(2) for women. Eighty-one hypertensive patients (38.76%) were categorized in the LVH(+) group. Age (P = 0.009), hypertension duration (P = 0.013), triglyceride levels (P = 0.028), and systolic blood pressure (P = 0.026) were higher, and sRAGE and high-density lipoprotein cholesterol levels were lower in the LVH(+) group compared with the LVH(-) group. Multivariate logistic regression analysis showed that sRAGE level [odds ratio (OR) = 0.916; 95% confidence interval (CI) = 0.864-0.984; P = 0.003], hypertension duration (OR = 1.024; 95%CI = 1.003-1.052; P = 0.027), and triglyceride level (OR = 1.017; 95%CI = 1.005-1.039; P = 0.018) were independent predictors of LVH in hypertensive patients. In conclusion, serum sRAGE level was inversely associated with LVH in hypertensive patients.
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Affiliation(s)
- Q Liu
- Endocrinology Department of Tongji Hospital Affiliated to Tongji University, Shanghai, China
| | - H B Chen
- Cardiology Department of Tongji Hospital Affiliated to Tongji University, Shanghai, China
| | - M Luo
- Geriatrics Department of Tongji Hospital Affiliated to Tongji University, Shanghai, China
| | - H Zheng
- Geriatrics Department of Tongji Hospital Affiliated to Tongji University, Shanghai, China
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Wu DD, Li SH, Jin LY, Jin Y, Cui YY, Zhao H, Liu HJ, Ma XX, Su W, Chen HB. [Influencing factors of visual hallucinations in patients with Parkinson's disease and its relationship with sleep disorders]. Zhonghua Yi Xue Za Zhi 2016; 96:1016-1020. [PMID: 27055793 DOI: 10.3760/cma.j.issn.0376-2491.2016.13.007] [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: 06/05/2023]
Abstract
OBJECTIVE To investigate the prevalence and influencing factors of visual hallucinations in patients with Parkinson's disease(PD), and to analyze the relationship between visual hallucinations and sleep disorders. METHODS We recruited 187 patients with PD(H-Y Ⅰ-Ⅲ) from outpatient department in Beijing Hospital. The patients were investigated for general information and the use of medicine. The patients were divided into visual hallucination(VH) group and non-hallucination(non-VH) group. A comparison study was conducted between two groups. We investigated the sleep disorders of PD patients according to Non Motor Symptom Quest(NMSquest) and Parkinson's disease sleep scale(PDSS). Logistic stepwise multiple regression procedures were used to determine the best predictive model of visual hallucinations in patients with PD. RESULTS (1) 42 cases(22.5%) of PD patients were accompanied by visual hallucinations; (2) the VH group and non-VH group had no difference in age, sex, duration of illness, the scores of Minimum Mental State Examination(MMSE) and levodopa equivalent doses (LED). The scores of Unified Parkinson's Disease Rating Scale(UPDRS) Ⅰ, the Hamilton Rating Scale for Anxiety(HAMA) and the Hamilton Rating Scale for Depression(HAMD) in VH group were significantly higher than those in non-VH group[3.5(2, 5) vs 2 (1, 3); 10(6.75, 15) vs 8(5, 11); 11(7.75, 17) vs 9(5, 13); P<0.05]; (3) the incidences of vivid dreams and REM sleep behavior disorder(RBD) in VH group were significantly higher than those in non-VH group(61.9% vs 40.7%, 71.4% vs 47.6%, P<0.05). There were no significant differences in incidences of excessive daytime sleepiness and restless legs between two groups(P>0.05). The score of PDSS in VH group was significantly lower than that in non-VH group[111(92.75, 128.25) vs 123(109, 135), P<0.05]; (4) the Logistic stepwise multiple regression revealed that vivid dreams(P=0.045) and the score of PDSS(P=0.006) were the independent influencing factors for VH in PD patients. CONCLUSIONS The incidence of VH in PD with H-Y staging Ⅰ-Ⅱ is 22.5%. The presence of vivid dreams and severe sleep disorder are independently associated with VH in PD.
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Affiliation(s)
- D D Wu
- Department of Neurology, Beijing Hospital, Beijing 100730, China
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Zhao XN, Liang JL, Chen HB, Liang YE, Guo HZ, Su ZR, Li YC, Zeng HF, Zhang XJ. Anti-Fatigue and Antioxidant Activity of the Polysaccharides Isolated from Millettiae speciosae Champ. Leguminosae. Nutrients 2015; 7:8657-69. [PMID: 26506375 PMCID: PMC4632442 DOI: 10.3390/nu7105422] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [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: 07/14/2015] [Revised: 09/29/2015] [Accepted: 10/06/2015] [Indexed: 11/16/2022] Open
Abstract
Millettiae speciosae Champ. Leguminosae (MSC), is a well-known Chinese herb traditionally used as food material and medicine for enhancing physical strength. Our preliminary study found that the aqueous extract of this herb (MSE) had an anti-fatigue effect. In this paper, we further separated MSE into total polysaccharides (MSP) and supernatant (MSS) by alcohol precipitation, and explored which fraction was active for its anti-fatigue effect. Mice were orally administered with MSP or MSS at the doses of 200, 400, and 800 mg/kg for 20 days and the anti-fatigue effect was assessed by exhaustive swimming exercise (ESE). The biochemical parameters related to fatigue after ESE and the in vitro antioxidant activity of active fraction were determined. Our results showed that MSP, instead of MSS, significantly extended the swimming time to exhaustion (p < 0.05), indicating that MSP is responsible for the anti-fatigue effect of MSE. In addition, MSP treatment increased the levels of glucose (Glu) and muscle glycogen, whereas it decreased the accumulations of blood urea nitrogen (BUN) and lactic acid (Lac). Moreover, ESE increased the levels of creatine phosphokinase (CK), lactic dehydrogenase (LDH), and malondialdehyde (MDA) but reduced superoxide dismutase (SOD) and glutathione (GSH) in plasma. In contrast, MSP inhibited all the above changes relating to fatigue. Furthermore, an in vitro antioxidant test revealed that MSP dose-dependently scavenged ·OH and DPPH free radicals. Taken together, these findings strongly suggested that MSP was able to alleviate physical fatigue by increasing energy resources and decreasing accumulation of detrimental metabolites. The antioxidant activity may crucially contribute to the observed anti-fatigue effect of MSP.
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Affiliation(s)
- Xiao-Ning Zhao
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China; (X.-N.Z.); (H.-B.C.)
- Department of Chinese Materia Medica, Guangdong Xinxing Junior College of the Traditional Chinese Medicine, Xinxing 527400, China
| | - Jia-Li Liang
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (J.-L.L.); (Y.-E.L.); (H.-Z.G.); (Z.-R.S.); (Y.-C.L.)
| | - Han-Bin Chen
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China; (X.-N.Z.); (H.-B.C.)
| | - Ye-Er Liang
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (J.-L.L.); (Y.-E.L.); (H.-Z.G.); (Z.-R.S.); (Y.-C.L.)
| | - Hui-Zhen Guo
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (J.-L.L.); (Y.-E.L.); (H.-Z.G.); (Z.-R.S.); (Y.-C.L.)
| | - Ze-Ren Su
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (J.-L.L.); (Y.-E.L.); (H.-Z.G.); (Z.-R.S.); (Y.-C.L.)
| | - Yu-Cui Li
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (J.-L.L.); (Y.-E.L.); (H.-Z.G.); (Z.-R.S.); (Y.-C.L.)
| | - Hui-Fang Zeng
- The First Affiliated Hospital of Chinese Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China; (X.-N.Z.); (H.-B.C.)
- Correspondence: (H.-F.Z.); (X.-J.Z.); Tel.: +86-20-39358-517 (H.-F.Z. & X.-J.Z.); Fax: +86-20-39358-390 (H.-F.Z. & X.-J.Z.)
| | - Xiao-Jun Zhang
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China; (J.-L.L.); (Y.-E.L.); (H.-Z.G.); (Z.-R.S.); (Y.-C.L.)
- Correspondence: (H.-F.Z.); (X.-J.Z.); Tel.: +86-20-39358-517 (H.-F.Z. & X.-J.Z.); Fax: +86-20-39358-390 (H.-F.Z. & X.-J.Z.)
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Chen HB, Zhang XC, Cheng YF, Abdelnasir A, Tang S, Kemper N, Hartung J, Bao ED. Association of heat shock protein 70 expression with rat myocardial cell damage during heat stress in vitro and in vivo. Genet Mol Res 2015; 14:1994-2005. [PMID: 25867345 DOI: 10.4238/2015.march.20.9] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To investigate the mechanism of sudden death as a result of stress-induced damage to heart tissue and myocardial cells and to investigate the cardioprotective role of Hsp70 during heat stress, the distribution and expression of Hsp70 was evaluated in the heart cells of heat-stressed rats in vivo and heat-stressed H9c2 cells in vitro. After exposure to heat stress at 42°C for different durations, we observed a significant induction of CK, CK-MB, and LDH as well as pathologic lesions characterized by acute degeneration, suggesting that cell damage occurs from the onset of heat stress. Immunocytochemistry showed that Hsp70 was distributed mainly in the cytoplasm of myocardial cells in vivo and in vitro. Hsp70-positive signals in the cytoplasm were more prominent in intact areas than in degenerated areas after 60 min of heat stress. Hsp70 protein levels in myocardial cells in vitro decreased from the beginning to the end of heat stress. Hsp70 protein levels in rat heart tissues in vivo decreased gradually with prolonged heat stress, with a slight increase at the beginning of heat stress. These results indicate that Hsp70 plays a role in the response of cardiac cells to heat stress and that decreased Hsp70 levels are associated with damage to rat myocardial cells in vitro and in vivo. Significant differences were found in hsp70 mRNA, which began to increase after 20 min of heat stress in vitro and after 40 min in vivo. This indicates that hysteresis is involved in mRNA expression after heat stress in vivo.
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Affiliation(s)
- H B Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - X C Zhang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - Y F Cheng
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - A Abdelnasir
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - S Tang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - N Kemper
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - J Hartung
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - E D Bao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
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Abdelnasir A, Sun JR, Cheng YF, Chen HB, Tang S, Kemper N, Hartung J, Bao ED. Evaluation of Hsp47 expression in heat-stressed rat myocardial cells in vitro and in vivo. Genet Mol Res 2014; 13:10787-802. [PMID: 25526199 DOI: 10.4238/2014.december.18.20] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The aim of the present study was to identify the correlation between expression of heat shock protein 47 (Hsp47) and stress injury in heat-stressed myocardial cells and to compare variations in Hsp47 expression in rat myocardial cells exposed to different heat stress for varying periods in vitro and in vivo. Exposure to heat stress at 42°C resulted in similar induction patterns of the heart damage-related enzyme aspartate aminotransferase in the supernatants of H9c2 cells and in the serum of rats. Histological analysis revealed that both H9c2 cells and heart tissues displayed cellular degeneration in response to different periods of heat stress. Hsp47 was constitutively expressed in the cytoplasm of H9c2 cells at all time points during heat stress, which was consistent with observations in heart fibers in vivo. Immunoblotting analysis revealed no significant difference between the expression of Hsp47 in H9c2 cells and heart tissue. However, the expression of hsp47 mRNA in response to heat stress was significantly increased in H9c2 cells at 60 min (P < 0.01) and 100 min (P < 0.01), which was comparable to that at 100 min (P < 0.01) in the rat heart. Thus, Hsp47 was elevated significantly after hyperthermia at the mRNA level but not at the protein level both in vitro and in vivo. The results suggest that Hsp47 turnover may increase during heat stress or that Hsp47 consumption exceeds its production.
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Affiliation(s)
- A Abdelnasir
- Department of Basic Veterinary Science, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - J R Sun
- Department of Basic Veterinary Science, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - Y F Cheng
- Department of Basic Veterinary Science, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - H B Chen
- Department of Basic Veterinary Science, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - S Tang
- Department of Basic Veterinary Science, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, China
| | - N Kemper
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - J Hartung
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - E D Bao
- Department of Basic Veterinary Science, College of Veterinary Medicine, Nanjing Agricultural University, Weigang 1, Nanjing, China
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Cheng YF, Sun JR, Chen HB, Abdelnasir A, Tang S, Kemper N, Hartung J, Bao ED. Association of Hsp60 expression with damage to rat myocardial cells exposed to heat stress in vivo and in vitro. Genet Mol Res 2014; 13:9371-81. [PMID: 25501148 DOI: 10.4238/2014.november.11.3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To investigate the protective role of Hsp60 against stress damage and its role in the sudden death of stressed animals, changes in the levels of Hsp60 protein and hsp60 mRNA of myocardial cells in vivo and in vitro were studied. In addition, the relationship between Hsp60 expression and heat-induced damage was also studied. Rats were exposed to a temperature of 42° ± 1°C for 0, 20, 40, 60, 80, or 100 min. More than 50% of the rats died suddenly within 100 min. With increasing heat stress duration, hsp60 mRNA levels significantly increased in both in vivo and in vitro rat myocardial cells; however, a similar trend was not observed for Hsp60 protein levels. Although the changes observed in Hsp60 expression in myocardial cells in vitro were inconsistent with those of rat heart tissues in vivo, Hsp60 expression levels were consistent with the histopathological damage observed in myocardial cells both in vivo and in vitro. Differences in Hsp60 expression may reflect the degree of injury sustained by myocardial cells in vivo and in vitro. As a mitochondrial protein, Hsp60 represents a potential biomarker of heat stress, and may protect against heat stress induced myocardial cellular damage both in vivo and in vitro.
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Affiliation(s)
- Y F Cheng
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - J R Sun
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - H B Chen
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - A Abdelnasir
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - S Tang
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
| | - N Kemper
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - J Hartung
- Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - E D Bao
- College of Veterinary Medicine, Nanjing Agricultural University, Nanjing, China
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Abstract
Owing to their prokaryotic origin, plastid rRNAs are mainly 23s/16s/5s rRNAs. We present a novel plant RNA isolation method in this paper. Also, not only the eukaryotic 28s (26s, 25s)/18s rRNAs but the prokaryotic 26s/23s rRNAs as well were demonstrated in a single sample for the first time by formaldehyde denaturing agarose gel electrophoresis.
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Affiliation(s)
- Y Q Zhu
- School of Life Sciences, Tsinghua University, Beijing, China
| | - Y Zheng
- School of Life Sciences, Tsinghua University, Beijing, China
| | - H B Chen
- School of Life Sciences, Tsinghua University, Beijing, China
| | - L Q Huang
- School of Life Sciences, Tsinghua University, Beijing, China
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Chen HB, Ying LL, Zhao LL, Xiang YX, Lin KZ, Wang W. [The effects of Kangai injection on enzyme activities of macrophages in rats]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2014; 30:417-420. [PMID: 25571632] [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: 06/04/2023]
Abstract
OBJECTIVE To study the effects of Kangai injection on the enzyme activities of macrophages and morphology of spleen and thymus from rats. METHODS Twenty four male SD rats were randomly divided into two groups (n = 12), normal control group and experimental group. The rats in experimental group were injected with Kangai injection at the dosage of 5 ml/kg x d for 30 days peritoneally and those in control group were injected with nomal saline at the same volume. The content of supermicro protein was assayed by BCA method, the activities of lactate dehydrogenase (LDH), glutathione peroxidase(GSH-Px), and inducible nitric oxide synthase (iNOS) from alveolar macrophages(AM) and peritoneal macrophages (PM) were detected biochemically. The activities of acid phosphatase (ACP), superoxide dismutase(SOD) and succinate dehydrogenase (SDH) from AM and PM were detected by ELISA. The morphology of spleen and thymus were observed by light microscopy. RESULTS The activities of LDH, GSH-Px and iNOS within AM and PM from experimental group were increased significantly compared with those of control group (P < 0.05). The activities of ACP, SOD and SDH in AM and PM from experimental group were also higher than those from control group (P < 0.05). Microscopically, there was thickening of peripheral arterial lymphatic sheath, enlargement of splenic lymphoid nodules with expended germinal center in the spleen of experimental group. There was no significant difference in the mophology of thymus between the two groups. CONCLUSION Kangai injection may improve immune function by activating macrophages.
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Affiliation(s)
- Han-Bin Chen
- First Affiliated Hospital, Wenzhou Medical University, China
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Abstract
The current study aimed to select suitable remedies for seawater immersion-complicated open-knee joint fracture by exploring the effects of different treatment methods. Forty adult rabbits weighing 2.20 ± 0.25 kg were divided equally into internal fracture fixation group (A), seawater-immersed group with primary internal fixation (B), seawater-immersed group with secondary internal fixation (C), and seawater-immersed group with external fixation (D), using the random-digit table method. Open-femoral internal condylar fracture models were established. Group A was left untreated for 2 h, whereas the other three groups were subjected to seawater immersion for 2 h. Afterwards, groups A and B underwent debridement and steel plate and screw internal fixation. Group C underwent debridement and external fixation, which was followed by secondary steel plate and screw internal fixation after the wound healed. Group D underwent transarticular arthrodesis. Wound infection, joint functional rehabilitation, and radiological and histopathological changes in fracture healing in each group were assessed. The results showed that delayed internal fixation effectively reduces the infection rate of seawater immersion-complicated open fracture and benefits joint function rehabilitation.
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Affiliation(s)
- J G Ai
- Department of Orthopaedics, The 180th Hospital of PLA, Quanzhou, China
| | - F Zhao
- Department of Orthopaedics, The 180th Hospital of PLA, Quanzhou, China
| | - Z M Gao
- State Key Laboratory of Trauma, Burns and Combined Injury, Department 4, Research Institute of Field Surgery, Daping Hospital, Third Military Medical University, Chongqing, China
| | - W Dai
- State Key Laboratory of Trauma, Burns and Combined Injury, Department 4, Research Institute of Field Surgery, Daping Hospital, Third Military Medical University, Chongqing, China
| | - L Zhang
- State Key Laboratory of Trauma, Burns and Combined Injury, Department 4, Research Institute of Field Surgery, Daping Hospital, Third Military Medical University, Chongqing, China
| | - H B Chen
- State Key Laboratory of Trauma, Burns and Combined Injury, Department 4, Research Institute of Field Surgery, Daping Hospital, Third Military Medical University, Chongqing, China
| | - J G Zhou
- State Key Laboratory of Trauma, Burns and Combined Injury, Department 4, Research Institute of Field Surgery, Daping Hospital, Third Military Medical University, Chongqing, China
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Xu XL, Hua JF, Li F, Zhang CJ, Yan LX, Du YC, Huang WH, Chen HB, Tang CX, Lu W, Yu P, An W, Joshi C, Mori WB. Phase-space dynamics of ionization injection in plasma-based accelerators. Phys Rev Lett 2014; 112:035003. [PMID: 24484147 DOI: 10.1103/physrevlett.112.035003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Indexed: 06/03/2023]
Abstract
The evolution of beam phase space in ionization injection into plasma wakefields is studied using theory and particle-in-cell simulations. The injection process involves both longitudinal and transverse phase mixing, leading initially to a rapid emittance growth followed by oscillation, decay, and a slow growth to saturation. An analytic theory for this evolution is presented and verified through particle-in-cell simulations. This theory includes the effects of injection distance (time), acceleration distance, wakefield structure, and nonlinear space charge forces, and it also shows how ultralow emittance beams can be produced using ionization injection methods.
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Affiliation(s)
- X L Xu
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - J F Hua
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - F Li
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - C J Zhang
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - L X Yan
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - Y C Du
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - W H Huang
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - H B Chen
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - C X Tang
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China
| | - W Lu
- Department of Engineering Physics, Tsinghua University, Beijing 100084, China and University of California Los Angeles, Los Angeles, California 90095, USA
| | - P Yu
- University of California Los Angeles, Los Angeles, California 90095, USA
| | - W An
- University of California Los Angeles, Los Angeles, California 90095, USA
| | - C Joshi
- University of California Los Angeles, Los Angeles, California 90095, USA
| | - W B Mori
- University of California Los Angeles, Los Angeles, California 90095, USA
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Xun H, Ding KZ, Yang M, Chen HB. [Histological observation of the central nervous system in Simulium (Wilhelmia) xingyiense (Diptera:Simuliidae)]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2013; 31:443-447. [PMID: 24818409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVE To investigate the morphological characters of the central nervous system in mature larvae, mature pupae and newly emerged adults of Simulium (Wilhelmia) xingyiense. METHODS From August to November 2009, the blackfly larvae were collected from the rivulets nearby Niujiao Island in Huaxi of Guiyang City. The mature larvae of S. (Wi.) xingyiense were confirmed based on the diagnostic characteristics of gill spots, postgenal cleft, and rectal gill. The mature pupae were obtained from the rivulets of Da'ao Town and Qingyan Town in Guiyang in March 2011, which were selected according to the characteristics of cocoon and respiratory filaments. Nervous system of the larvae, pupae and newly emerged adults was observed under the light microscope with HE-stained paraffin sections. RESULTS The central nervous system was composed of brain, subesophageal ganglion and ventral nerve cord. The brain of the larva was divided into two narrowly interconnected egg-shaped lobes. Ventral nerve-cord of the larva consisted of three pairs of thoracic ganglia and eight pairs of abdominal ganglia. The brain of the pupa and adult was composed of protocerebuim, deutocerebrum, and tritocerebrum. The ventral nerve cord of the pupa and adult was similar to that of larva. From outside to inside, the structure characters of the brain and ganglia were similar with nerve sheath, neurocyte and neuropile. The neuropile of protocerebrum contained a pair of mushroom bodies, a central complex and a pair of accessory lobes. The optic lobe was composed of medulla interna, medulla externa and lamina ganglionaris. The deutocerebrum consisted of the antennal lobe and the dorsal lobe. The tritocerebrum connected to the subesophageal ganglion by perioperative esophageal nerve. CONCLUSION The central nervous system of S. (Wi.) xingyiense is similar to other simuliid blackilies. There is a difference in the number of abdominal ganglion of the mature larva.
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Zhu YQ, Wu WJ, Xiao HW, Chen HB, Zheng Y, Zhang YJ, Wang HX, Huang LQ. A generic plant RNA isolation method suitable for RNA-Seq and suppression subtractive hybridization. Genet Mol Res 2013; 12:5537-46. [PMID: 24301924 DOI: 10.4238/2013.november.18.4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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
A recently developed revolutionary approach to transcriptomics, RNA-Seq, and suppression subtractive hybridization are powerful tools for gene expression research. However, currently, the difficulty of isolating high-quality RNAs from plant tissues bearing abundant complex polysaccharides, polyphenolics, and secondary metabolites is a serious problem that not only limits the application of these technologies but also hinders studies dealing with RNA in general. We have developed a consistent protocol to prepare highly intact and pure RNAs from tissues of a variety of field-grown plant species, with high yields, in 2 to 3 h. Additionally, this method can be readily applied to mammalian, yeast, and bacterial cells.
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Affiliation(s)
- Y Q Zhu
- School of Life Sciences, Tsinghua University, Beijing, China
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40
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Li F, Hua JF, Xu XL, Zhang CJ, Yan LX, Du YC, Huang WH, Chen HB, Tang CX, Lu W, Joshi C, Mori WB, Gu YQ. Generating high-brightness electron beams via ionization injection by transverse colliding lasers in a plasma-wakefield accelerator. Phys Rev Lett 2013; 111:015003. [PMID: 23863007 DOI: 10.1103/physrevlett.111.015003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Indexed: 06/02/2023]
Abstract
The production of ultrabright electron bunches using ionization injection triggered by two transversely colliding laser pulses inside a beam-driven plasma wake is examined via three-dimensional particle-in-cell simulations. The relatively low intensity lasers are polarized along the wake axis and overlap with the wake for a very short time. The result is that the residual momentum of the ionized electrons in the transverse plane of the wake is reduced, and the injection is localized along the propagation axis of the wake. This minimizes both the initial thermal emittance and the emittance growth due to transverse phase mixing. Simulations show that ultrashort (~8 fs) high-current (0.4 kA) electron bunches with a normalized emittance of 8.5 and 6 nm in the two planes, respectively, and a brightness of 1.7×10(19) A rad(-2) m(-2) can be obtained for realistic parameters.
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Affiliation(s)
- F Li
- Key Laboratory of Particle and Radiation Imaging of Ministry of Education, Tsinghua University, Beijing 100084, China
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Jian WX, Jin J, Qin L, Fang WJ, Chen XR, Chen HB, Su Q, Xing HL. Relationship between thyroid-stimulating hormone and blood pressure in the middle-aged and elderly population. Singapore Med J 2013; 54:401-5. [DOI: 10.11622/smedj.2013142] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chen HB, Wang L, Jiang JF. Re-analysis of expression profiles for revealing new potential candidate genes of heart failure. Eur Rev Med Pharmacol Sci 2013; 17:903-911. [PMID: 23640436] [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
BACKGROUND Chronic heart failure (HF) is characterized by diminished cardiac output and pooling of blood in the venous system. AIM We used the GSE1145 microarray data to identify potential genes that related to heart failure to construct a regulation network. MATERIALS AND METHODS In the network, some of transcription factors (TFs) and target genes have been proved to be related to heart failure in previous study. The gene MYC, RELA, HIF1A, NFκB1 and SMAD3 are as hub nodes in our transcriptional network and have a close relationship with heart failure. RESULTS The study did not address regulation network but researched for the significant pathways related to chronic heart failure. Besides, RELA and NFκB1 interfere with each other in response to HF. CONCLUSIONS It is demonstrated that transcriptional network analysis is useful in identification of the candidate genes in heart failure.
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Affiliation(s)
- H B Chen
- Department of Medical Cardiology, Tongji Hospital, Affiliated to Tongji University, Shanghai, China
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Wang D, Yan LX, Du YC, Hua JF, Du Q, Qian HJ, Lu XH, Huang WH, Chen HB, Tang CX. Generating ultrabroadband terahertz radiation based on the under-compression mode of velocity bunching. Rev Sci Instrum 2013; 84:022704. [PMID: 23464186 DOI: 10.1063/1.4790430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We propose and analyze a scheme to generate enhanced ultrabroadband terahertz (THz) radiation through coherent transition radiation emitted by ultrashort electron beams based on a 10.5 m beamline at Tsinghua University. The proposed scheme involves the initial compression of the electron beam with a few hundred pC charges using a velocity bunching scheme (i.e., RF compression) in an under-compression mode instead of the usual critical-compression mode in order to maintain a positive energy chirp at the exit of the traveling wave accelerator. After a long drift segment, the particles in the tail catch up with the bunch head. More than 80% of the particles are distributed in a spike with an rms length less than 20 fs. Such beams correspond to an ultrabroadband coherent transition radiation (CTR) spectrum of 0.1 THz to 25 THz, with the single-pulse THz radiation energy of up to 50 μJ. The principle of CTR and under-compression mode of velocity bunching are introduced in this paper. And the ASTRA simulation parameters and the stability of the system are also discussed.
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Affiliation(s)
- D Wang
- Accelerator Laboratory, Department of Physics Engineering, Tsinghua University, Beijing 100084, China.
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Huang L, Zhang CL, Huang RY, Chen HB. [Observation on salivary gland polytene chromosomes of Simulium qianense (Diptera : Simuliidae)]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2012; 30:353-356. [PMID: 23484273] [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: 06/01/2023]
Abstract
The salivary gland polytene chromosomes of Simulium qianense was observed with wild larvae collected from Guiyang, Guizhou Province. Using an upgraded method of preparation, the polytene chromosomes of the larval salivary glands of S. qianense were observed and analysed. The results showed three pairs of chromosomes (2n = 6) arranged from the longest to the shortest. Chromosome I was metacentric while chromosomes II and III were submetacentric. The centromeric regions distinctly expanded and were easily recognized. The nucleolar organizer situated near the centromeric band of the short arm of chromosome II. The Balbiani ring and double bubble all located near the tip of the short arm of chromosome II. There were inversions in some individuals, with an inversion frequency of 33% (32/97). The study revealed constant localization and morphology of the principal landmarks (namey, centromere, nucleolar organizer, Balbiani ring, double bulge, band and puff) which can be considered as distinguishable features of S. qianense.
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Affiliation(s)
- Li Huang
- Department of Biology, Guiyang Medical University, Guiyang 550004, China
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45
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Xiong FL, Chen HB, Chang XL, Yang YJ, Xu HB, Yang XL. Research progress of triptolide-loaded nanoparticles delivery systems. Conf Proc IEEE Eng Med Biol Soc 2012; 2005:4966-9. [PMID: 17281359 DOI: 10.1109/iembs.2005.1615589] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Triptolide is one of the major active components of traditional Chinese Medicine (TCM) - Tripterygium wilfordii Hook. f. (TWHf), which has been reported to be effective in the treatment of patients with a variety of inflammatory and autoimmune diseases, especially rheumatoid arthritis. However, its clinical use is restricted due to its scarce water solubility and some toxic effects. In order to find innovative ways for administering triptolide and alleviating its disadvantages, the novel types of delivery systems have been developed. This paper reviews the studies of triptolide- loaded nano drug delivery systems (NDDS) in our group during the past three years. The preparation, characterization, pharmacology and toxicity of triptolide-loaded solid lipid nanoparticles, microemulsions and polymeric nanoparticles were investigated. The results indicated that the NDDS presented more powerful activity and a lower toxicity in comparison with common drug carrier.
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Affiliation(s)
- F L Xiong
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, 430074 P.R. China
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Xun H, Yang M, Wu H, Chen HB. [Histology of the alimentary canal in mature larva of Simulium (Wilhelmia) xingyiense chen and zhang (Diptera: Simuliidae)]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2011; 29:104-106. [PMID: 21826893] [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: 05/31/2023]
Abstract
The histology of alimentary canal of Simulium (Wilhelmia) xingyiense mature larva (with gill spots) was investigated by using paraffin serial section. The alimentary canal is composed of foregut, midgut and hindgut. The foregut includes pharynx, esophagus and proventriculus. The up-inside of buccal cavity invaginates to form the labral gland with irregular shape. Ossified cibarium exist in anterior pharynx. Canular proventriculus forms by the invagination of esophagus. The midgut begins with four big gastric caeca, and divides into three regions according to the epithelium cell shape. The hindgut consists of pylorus, ileum and rectal. The structure of the ileum is different from rectal. Four malpighian tubules diverge from the boundary between midgut and hindgut. The structure of silk duct is special
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Affiliation(s)
- Hui Xun
- Department of Biology, Guiyang Medical College, Guiyang 550004, China
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Luo HB, Yang M, Chen HB. [Bioinformatics analysis of CO I gene of Simulium quinquestriatum]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2010; 28:473-475. [PMID: 21500540] [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
The genomic DNA was extracted from Simulium quinquestriatum (Sq) and its CO I gene was amplified by PCR. The PCR product was purified and cloned into plasmid pMD18-T vector. The recombinant plasmid was transformed into Escherichia coli DH5alpha and then identified by digestion with restriction enzyme and PCR amplification. The amplified fractions (1 621 bp) included complete CO I gene (1 542 bp, GenBank accession number: DQ534949), 5' tRNA-Tyr and 3' tRNA-Leu partial fraction. The CO I gene sequence had a high identity (99%) with that of S. quinquestriatum (GenBank accession number: AY251520). Bioinformatics analysis showed that the Sq-CO I open reading frame encoded a 513-amino acid protein with M(r) 5565, pI5.84. Structural prediction showed this protein possessed a conservative domain of CO I gene.
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Affiliation(s)
- Hong-Bin Luo
- Department of Biochemistry, Medical School, Hubei University for Nationalities, Enshi 445000, China
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Chen HB, Islam MW, Radhakrishnan R, Wahab SA, Naji MA. Influence of aqueous extract from Neurada procumbens L. on blood pressure of rats. J Ethnopharmacol 2004; 90:191-194. [PMID: 15013180 DOI: 10.1016/j.jep.2003.09.045] [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] [Subscribe] [Scholar Register] [Received: 05/20/2002] [Revised: 09/11/2003] [Accepted: 09/12/2003] [Indexed: 05/24/2023]
Abstract
Neurada procumbens is a desert plant in the Arabian Peninsula. It has been considered edible by Bedouin and has been used traditionally as a medicinal herb. During a screening test of Arabian plants, the aqueous extract of Neurada procumbens increased the blood pressure of anaesthetized normotensive rats when it was administered orally. Further studies proved it elevated the blood pressure of conscious SHR, and produced vasoconstriction on the aortic strips of rats in vitro, which was reduced partially by phentolamine. This study demonstrates that the aqueous extract of the plant has an effect of increasing blood pressure that might be mediated through alpha-adrenergic receptors. Though more investigations are needed to prove its effect in humans, the present study warns that Neurada procumbens might not be so safe as it has been considered, and people, especially those with cardiovascular diseases, should be careful when they use the plant.
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Affiliation(s)
- H B Chen
- Department of Pharmacology and Toxicology, Zayed Complex for Herbal Research and Traditional Medicine, Ministry of Health, Post Box 29300, Abu Dhabi, Saudi Arabia
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Abstract
AIM: To explore the etiologic role of HPV infection in esophageal carcinoma, and the association of HPV-16 E6 with the nuclear matrix of carcinoma cells.
METHODS: Two esophageal carcinoma cell lines, EC/CUHK1 and EC/CUHK2, were tested for HPV-16 E6 subgenetic fragment by polymer a se chain reaction amplification of virus DNA associated nuclear matrix. RT-PCR and immunocytochemistry were also used to visualize the expression of E6 subgene in the cells.
RESULTS: The HPV-16 E6 subgenetic fragment was found to be present in nuclear matrix-associated DNA, E6 oncoprotein localized in the nucleus where it is tightly associated with nuclear matrix after sequential extraction in EC/CUHK2 cells. It was not detected, however, in EC/CUHK1 cells.
CONCLUSION: The interaction between HPV-16 E6 and nuclear matrix may contribute to the virus induced carcinogenesis in esophageal carcinoma.
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Affiliation(s)
- H B Chen
- Department of Histology and Embryology, Shantou University Medical College, Guangdong Province, China.
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Wang YL, Zhou JH, Wang YF, Bao JS, Chen HB. Properties of hybrid enzymes between Synechococcus large subunits and higher plant small subunits of ribulose-1,5-bisphosphate carboxylase/oxygenase in Escherichia coli. Arch Biochem Biophys 2001; 396:35-42. [PMID: 11716459 DOI: 10.1006/abbi.2001.2555] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/22/2022]
Abstract
To explore the function of small subunits of Rubisco, three hybrid enzymes were synthesized in Escherichia coli by construction of a transcriptionally coupled expression system in which the synthetic small subunit gene of rice, tobacco, and wheat, respectively, was cloned downstream from the large subunit gene of Synechococcus sp. PCC6301. These coexpression products were detected by utilizing SDS-PAGE and confirmed by immunoblotting. The amount of carboxylase activity from the intact cells revealed that each higher plant small subunit was able to assemble with the Synechococcus large subunit octamer core to form an active heterologous enzyme in E. coli. However, in these heterologous enzymes, the interaction between large subunits and small subunits was very weak, the small subunit readily dissociated from the large subunit octamer core. A detailed kinetic assay was carried out with the partially purified hybrid enzymes. Compared to Synechococcus Rubisco, the activity of rice, tobacco, and wheat hybrid Rubisco decreased to 37, 61, and 37% of the original activity, respectively. These hybrid enzymes showed a greater affinity for CO2 and RuBP than Synechococcus Rubisco. The specificity factor of the three hybrid Rubiscos was 98, 84, and 76%, respectively, of the original. These results indicate for the first time that the small subunit contributes to the stability, catalytic efficiency, and CO2/O2 specificity of Rubisco together, which suggests that small subunits may be fruitful targets for engineering an improved Rubisco. Meanwhile, we found that sorbitol in the culture of induced cells promoted the production of active assembled enzyme and shortened the time to reach maximal expression.
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Affiliation(s)
- Y L Wang
- State Key Laboratory of Bio-organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Shanghai, 200032, China
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