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Liu JM, Zhang DW, Du WY, Zhang M, Zhao JL, Chen RD, Xie KB, Dai JG. Sesquiterpenes from the endophytic fungus Periconia sp. F-31. J Asian Nat Prod Res 2022; 24:397-402. [PMID: 34128441 DOI: 10.1080/10286020.2021.1935892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 05/24/2021] [Indexed: 06/12/2023]
Abstract
One new eremophilane sesquiterpene periconianone L (1), together with four known guaiane-type sesquiterpenes 4,10,11-trihydroxyguaiane (2), (-)-guai-1(10)-ene-4α,11-diolhydroxymecuration (3), guaidiol A (4), and epi-guaidiol A (5) were isolated from the endophytic fungus Periconia sp. F-31. The structure of the new compound was established by spectroscopic methods, including UV, IR, HRESIMS, and extensive NMR techniques. Compound 3 was isolated as natural product for the first time.
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Affiliation(s)
- Ji-Mei Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - De-Wu Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Wen-Yu Du
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Min Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jin-Lian Zhao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ri-Dao Chen
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ke-Bo Xie
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jun-Gui Dai
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, CAMS Key Laboratory of Enzyme and Biocatalysis of Natural Drugs, and NHC Key Laboratory of Biosynthesis of Natural Products, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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Zhang DW, Gu DC, Qu JY, Zhang H, Zheng Z. Between-hospital variation in outcomes of coronary artery bypass grafting in China, 2013–2019. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1142] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Coronary artery bypass grafting (CABG) is widely performed across China. Understanding current between-hospital variation is important for further quality improving initiatives.
Purpose
To assess the between-hospital variation comprehensively on outcomes of isolated CABG, and explore hospital-level characteristics and practice patterns explaining the variation.
Methods
We used the data of Chinese Cardiac Surgery Registry (2013–2019) to examine the between-hospital variation of outcomes, including in-hospital mortality (or treatment withdrawal) and major complications (mortality, postoperative myocardial infarction, stroke, renal failure, mediastinal infection, and reoperation for bleeding). Multilevel mixed-effect models and propensity score adjusting technique were used to quantify the variability and study hospital-level factors associated with the variation. Risk-standardized mortality rate (RSMR) was used to classify hospital performance.
Results
Among 60876 patients (62.6 years old, 75.4% male) undergoing isolated CABG in 70 hospitals, the mortality was 2.0% and 5.3% had major complications. After adjusting for patient case-mix, the median hospital RSMR was 2.1% (inter-quartile range [IQR], 1.3%-3.1%), with the median odds ratio (MOR) of 2.1; and 5.7% (IQR, 3.7%-7.5%) for risk-standardized major complications, with the MOR of 1.9. Compared with patients admitted in average-performance hospitals, patients undergoing CABG in worse-performance hospitals had a nearly twofold higher odds of in-hospital mortality (adjusted odds ratio [AOR]=1.92; 95% confidence interval (CI), 1.37–2.69), whereas patients in better-performance hospital had an approximately 60% lower odds (AOR=0.41; 95% CI, 0.30–0.57). Hospital location and average surgeon volume explained 20.2% of the between-hospital variation, where hospital-level perioperative blood transfusion rate and use of secondary prevention medication further contributed to the proportion change variance of 3.3% and 2.3%, respectively. Similar results were obtained for major complications.
Conclusion(s)
Consistent between-hospital variation of CABG performance exists in China. Improving the clinical practice management and reducing variability may better the overall outcomes.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- D W Zhang
- Fuwai Hospital, CAMS and PUMC, Beijing, China
| | - D C Gu
- Fuwai Hospital, CAMS and PUMC, Beijing, China
| | - J Y Qu
- Fuwai Hospital, CAMS and PUMC, Beijing, China
| | - H Zhang
- Fuwai Hospital, CAMS and PUMC, Beijing, China
| | - Z Zheng
- Fuwai Hospital, CAMS and PUMC, Beijing, China
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Hu L, Zhang DW, Jiang HY, Ji S, Wei YY, Hu HQ, Fei GH. [Correlation between systemic inflammation level and emphysema degree and bone mineral density in chronic obstructive pulmonary disease patients and its mechanism]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:213-217. [PMID: 33721934 DOI: 10.3760/cma.j.cn112147-20200721-00824] [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 study the correlation between systemic inflammation level and emphysema degree and bone mineral density in chronic obstructive pulmonary disease (COPD) patients and its possible mechanism. Methods: 90 patients with stable COPD who met the inclusion criteria and 50 controls in the physical examination center during the same period were recruited. All the enrolled objects have collected general clinical data, analyzed peripheral blood samples, measuring the Low-attenuation area of lung and CT value of lumbar 1 vertebra (L1-CT) by chest spiral CT. According to LAA%, COPD patients were divided into 36 cases of the non-emphysema group, 32cases of mild to moderate emphysema group, and 22 cases of severe emphysema group. The correlation between L1-CT value, LAA%, peripheral blood inflammatory factors, and pulmonary function indices in each group was analyzed and compared. Results: The HU value of L1-CT (107±32) in the COPD group was significantly lower than that in the control group (153±30), and the difference was statistically significant (P<0.05). The higher the LAA% in COPD patients was, the lower the value of L1-CT was, and the difference between groups was statistically significant. Compared with COPD patients in the non-emphysema group, peripheral blood neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR), and C-reactive protein (CRP) were all increased in the emphysema group, and the differences were statistically significant (P<0.05). L1-CT was negatively correlated with LAA, PLR, NLR, and CRP while uncorrelated with serum concentration of calcium and phosphorus. Conclusion: The decrease in bone density in COPD patients is closely related to the degree of emphysema. It is associated with increased levels of systemic inflammation caused by COPD itself. Early and timely broad-spectrum anti-inflammatory treatment may have certain clinical significance for the prevention and treatment of comorbidity with osteoporosis.
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Affiliation(s)
- L Hu
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - D W Zhang
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - H Y Jiang
- Department of Health Care Medicine, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - S Ji
- Key Laboratory of Respiratory Diseases Research and Medical Transformation of Anhui Province, Hefei 230022, China
| | - Y Y Wei
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - H Q Hu
- Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
| | - G H Fei
- Key Laboratory of Respiratory Diseases Research and Medical Transformation of Anhui Province, Hefei 230022, China
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Su Y, Ma XL, Wang HM, Qin H, Qin MQ, Zhang FQ, Jin M, Zhang DW, Chen CH, Zeng Q, He LJ, Ni X. [Clinical characteristics and prognostic analysis of 458 children with high-risk neuroblastoma in a single center]. Zhonghua Er Ke Za Zhi 2020; 58:796-801. [PMID: 32987457 DOI: 10.3760/cma.j.cn112140-20200525-00540] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To summarize the clinical characteristics of high-risk neuroblastoma (HR-NB) in a single center, analyze the prognostic factors of HR-NB. Methods: The clinical data of children with HR-NB who were treated and followed up at the hematology-oncology center of Beijing Children's Hospital from February 1, 2007 to June 30, 2018 were analyzed retrospectively. The clinical features were summarized. Kaplan-Meier method was used for survival analysis and Cox regression was used to analyze the prognostic factors. The last follow-up time was June 30, 2019. Results: A total of 458 children with HR-NB were enrolled in this study, including 265 males (57.9%) and 193 females (42.1%), the age at diagnosis was 40.0 months (4.5-148.0 months), the follow-up time was 22.0 months (0.2-138.0 months) and the time of tumor progression or recurrence was 15 months (1-72 months). The 5-year event-free survival (EFS) rate was (31.2±2.6)% and the 5-year overall survival (OS) rate was (43.9±3.2)%. The 5-year EFS rate and 5-year OS rate in 142 hematopoietic stem cell transplantation (HSCT) patients with bone marrow metastases were better than that in 196 non-transplantation cases with bone marrow metastases ((26.5±4.5)% vs. (25.1±3.6)%, χ²=13.773, P=0.001; (38.1±5.5)% vs. (35.7±4.7)%, χ²=9.235, P=0.002); 128 transplantation patients with bone metastases had higher 5-year EFS rate and 5-year OS rate than 188 non-transplantation cases with bone metastases ((28.5±5.0)% vs. (26.7±3.8)%, χ²=10.222, P=0.001; (37.1±6.0)% vs. (36.2±4.8)%, χ²=7.843, P=0.005). The 5-year EFS rate was higher in 37 HSCT patients with MYCN amplification than in 49 non-transplantation cases with MYCN amplification ((26.8±8.0) % vs. (20.5±6.4) %, χ²=5.732, P=0.017). No significant difference was found in 5-years OS rate between transplantation group with MYCN amplification and non-transplantation group with MYCN amplification ((31.4±8.6) % vs. (26.2±7.4) %, χ²=3.230, P=0.072). Univariate survival analysis showed that lactate dehydrogenase (LDH)≥1 500 U/L was associated with poor prognosis of patients with MYCN amplification (χ²=6.960, P=0.008). Multivariate Cox analysis showed bone marrow metastasis and LDH≥1 500 U/L were independent risk factors for poor prognosis of patients with non-MYCN amplification (HR=2.427, 1.618;95%CI:1.427-4.126, 1.275-2.054, P<0.05) for both comparisons. Conclusions: LDH≥1 500 U/L was the poor prognostic factor for patients with MYCN amplification. The bone marrow metastasis and LDH≥1 500 U/L were the poor prognostic factors for HR-NB patients with non-MYCN amplification. HSCT can improve the prognosis of patients with bone or bone marrow metastasis. It can also retard the time of progression or recurrence for patients with MYCN amplification.
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Affiliation(s)
- Y Su
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics, Ministry of Education, Key Laboratory of Major Diseases in Children, Beijing 100045, China
| | - X L Ma
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics, Ministry of Education, Key Laboratory of Major Diseases in Children, Beijing 100045, China
| | - H M Wang
- Department of Surgical Oncology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - H Qin
- Department of Surgical Oncology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - M Q Qin
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics, Ministry of Education, Key Laboratory of Major Diseases in Children, Beijing 100045, China
| | - F Q Zhang
- Department of Radiation Oncology, Beijing Union Hospital, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - M Jin
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics, Ministry of Education, Key Laboratory of Major Diseases in Children, Beijing 100045, China
| | - D W Zhang
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics, Ministry of Education, Key Laboratory of Major Diseases in Children, Beijing 100045, China
| | - C H Chen
- Department of Thoracic Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 10005, China
| | - Q Zeng
- Department of Thoracic Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 10005, China
| | - L J He
- Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 10004, China
| | - X Ni
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
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Zhang DW, Song LJ, Li Y, Song JL, Liu ZJ, Yang JW, Zheng X, Zhang HB. [Status on the use of anti-hypertensive drugs in the southwest areas of China]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:520-525. [PMID: 32344475 DOI: 10.3760/cma.j.cn112338-20190627-00472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the current status of anti-hypertensive drug use in patients with hypertension in the Southwest areas of China. Methods: Based on the Program of Screening and Intervention Subjects with High Risk Cardiovascular Diseases, this study presented information on adults aged 35-75 in Southwest China by convenient sampling method, from January 2016 to November 2018. Basic information and cardiovascular related data were collected. Data on hypertensive patients were recorded, including names, doses and frequency of anti-hypertensive drugs they used. Information on the use of anti-hypertensive drugs among different hypertension subgroups, potential related characteristics, types and combination patterns of drugs, etc., were analyzed. Results: A total of 394 957 subjects were included in the study, with 159 014 identified as being hypertensive [mean age (58.8±9.5) years, 40.2% male]. 29.8% of them ever received antihypertensive drugs. A total of 30 445 of the patients reported detailed information of the drugs they ever used and 22.5% of them received therapy of combined drugs. Rates of using combination therapy were consistent among subgroups with different age, gender, blood pressure level and history of cardiovascular and cerebrovascular diseases. Results from the multivariate logistic regression analysis showed that patients with previous cardiovascular and cerebrovascular events, obesity or diabetes were more likely to have received combined therapy, while patients with less education or lower income were in the opposite. Calcium antagonists (58.6%) were the main drugs being used in single drug therapy, while traditional fixed-dose combination drugs (31.4%) were the most common ones in the drug-combination therapy, followed by angiotensin converting enzyme inhibitor/angiotensin receptor blocker combined with calcium antagonists (22.4%). Angiotensin converting enzyme inhibitor/angiotensin receptor blocker combined with beta blocker was the main drug used in patients with coronary heart disease. Conclusions: Treatment programs using the antihypertensive drugs for hypertensive patients in Southwest China needs to be improved, since the irrational use of antihypertensive drugs still exists. However, we would encourage the use of combination therapy for hypertensive patients.
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Affiliation(s)
- D W Zhang
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - L J Song
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Y Li
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - J L Song
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Z J Liu
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - J W Yang
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - X Zheng
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - H B Zhang
- National Clinical Research Center for Cardiovascular Diseases, State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
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Xu N, Duan C, Jin M, Zhang DW, Su Y, Yu T, He LJ, Fu LB, Zeng Q, Wang HM, Zhang WP, Ni X, Ma XL. [Clinical and prognostic analysis of single-center multidisciplinary treatment for rhabdomyosarcoma in children]. Zhonghua Er Ke Za Zhi 2019; 57:767-773. [PMID: 31594063 DOI: 10.3760/cma.j.issn.0578-1310.2019.10.008] [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] [Indexed: 11/05/2022]
Abstract
Objective: To summarize the clinical characteristics, treatment response and prognostic factors of rhabdomyosarcoma (RMS) in children. Methods: The clinical characteristics such as age at diagnosis, primary tumor site, tumor size, pathological type, clinical stage, and risk grouping of 213 RMS patients (140 males and 73 females) treated in Hematology Oncology Center of Beijing Children's Hospital, Capital Medical University, from May 2006 to June 2018 were analyzed retrospectively. The clinical characteristics, overall survival (OS), event free survival (EFS) and prognostic factors of children treated with the Beijing Children's Hospital-Rhabdomyosarcoma (BCH-RMS) regimen were analyzed. Survival data were analyzed by Kaplan-Meier survival analysis, and single factor analysis was performed by Log-Rank test. Results: The diagnostic age of 213 cases was 48.0 months (ranged 3.0-187.5 months), of which 136 cases (63.8%) were younger than 10 years old. The head and neck region was the most common primary site of tumor (30%, 64 cases), followed by the genitourinary tract (26.8%, 57 cases). Among pathological subtypes, embryonal RMS accounted for 71.4% (152 cases), while alveolar RMS and anaplastic RMS accounted for only 26.8% (57 cases) and 1.9% (4 cases), respectively. According to the Intergroup Rhabdomyosarcoma Study Group (IRS), IRS-Ⅲ and Ⅳ accounted for 85.0% (181 cases) of all RMS patients. In all patients, 9.4% (20 cases) patients were divided in to low-risk group, 52.1% (111 cases) patients in to intermediate -risk group, 25.8% (55 cases) patients in to high-risk group, and 12.7% (27 cases) patients in to the central nervous system invasion group, respectively. All patients with RMS received chemotherapy. The cycles of chemotherapy were 13.5 (ranged 5.0-18.0) for patients without event occurrence, while 14.2 (ranged 3.0-30.0) for patients with event occurrence. Among the 213 patients, 200 patients had surgical operation, of whom 103 patients underwent surgery before chemotherapy and 97 patients at the end of chemotherapy, 21 patients had secondary surgical resection. Radiotherapy was performed in 114 patients. The follow-up time was 23.0 months (ranged 0.5-151.0 months) . There were 98 patients with relapsed or progressed disease and 67 patients with death. The median time to progression was 10 months, of which 67 (68.4%) relapse occurred within 1 year and no recurrence occurred after follow-up for more than 5 years. The 3-year EFS and 5-year EFS were (52±4) % and (48±4) %, while the 3-year OS and 5-year OS were (65±4) % and (64±4) % by survival analysis. The 5-year OS of the low-risk, intermediate-risk, the high-risk were 100%, (74±5) %, (48±8) %, and the 2-year OS of the central nervous system invasion group was (36±11) % (χ(2)=33.52, P<0.01). The 5-year EFS of the low-risk, intermediate-risk, the high-risk were (93±6) %, (51±5) %, (36±7) % and the 2-year EFS of the central nervous system invasion group was (31±10) % (χ(2)=24.73, P<0.01) . Survival factor analysis suggested that the OS of children was correlated with age(χ(2)=4.16, P=0.038), tumor TNM stage (χ(2)=22.02, P=0.001), IRS group (χ(2)=4.49, P<0.01) and the risk group (χ(2)=33.52, P<0.01). Conclusions: This study showed that the median age of newly diagnosed RMS patients was 4 years. The head and neck and the genitourinary tract were the most common primary origin of RMS. The OS was low in single-center RMS children. The median time to recurrence was 10 months, and recurrence was rare 3 years later.
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Affiliation(s)
- N Xu
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - C Duan
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - M Jin
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - D W Zhang
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - Y Su
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - T Yu
- Department of Radiology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - L J He
- Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - L B Fu
- Department of Pathology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Q Zeng
- Department of Thoracic Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - H M Wang
- Department of Surgical Oncology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - W P Zhang
- Department of Urological Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - X Ni
- Department of Otolaryngology Head and Neck Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - X L Ma
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
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Zhang DW, Li JX, Hu JL, Peng BZ, Zhu FC. [Research progress of maternal immunization]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 53:534-539. [PMID: 31091616 DOI: 10.3760/cma.j.issn.0253-9624.2019.05.020] [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
Maternal immunization is an immune strategy that protects both mothers and early-life infants from disease by the vaccination of pregnant women. The effect of maternal immunization is influenced by the types of vaccines, the timing of vaccination, the subtypes of antibodies induced by vaccines, and the health status of mothers themselves. Inactivated influenza vaccination during pregnancy and DPT vaccination during the third trimester of pregnancy have been widely used in the world, while Hepatitis B vaccine, pneumococcal and meningococcal vaccines also show good efficacy and safety in pregnant women. This article reviews the research progress of Maternal Immunization in order to provide a reference for Maternal Immunization planning and policymaking in China.
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Affiliation(s)
- D W Zhang
- School of Public Health, Southeast University, Nanjing 210009, China
| | - J X Li
- Department of Vaccine Clinical Evaluation, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - J L Hu
- Department of Vaccine Clinical Evaluation, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - B Z Peng
- School of Public Health, Southeast University, Nanjing 210009, China
| | - F C Zhu
- School of Public Health, Southeast University, Nanjing 210009, China
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Chen L, Zhao YX, Yang MF, Zhang DW, Shu XW, Liu C. Cross-coupling drift between magnetic field and temperature in depolarized interferometric fiber optic gyroscope. Opt Express 2019; 27:6003-6011. [PMID: 30876194 DOI: 10.1364/oe.27.006003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
We propose a theory of cross-coupling drift in depolarized interferometric fiber optic gyroscopes (D-IFOGs) under the joint influence of magnetic field and temperature. The magnetic field and temperature cross-coupling drift (MTCD) originates from the interaction of the nonreciprocal circular birefringence produced by the magnetic field, the thermal stress birefringence from the varying temperature, and the inherent residual birefringence in the fiber coil. The MTCD is much greater than the sum of the individual drifts induced by magnetic field and temperature. We established a relevant theoretical model and carried out numerical simulations, and verified the results experimentally. For a typical D-IFOG, the experimental results showed a cross-coupling degree exceeding 170% when the temperature varied from -20 °C to 60 °C, as predicted in the simulations.
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Zhang DW, Pan XB, Li P, Ouyang WB, Zhang FW, Liu Y, Wang SZ, Zhao GZ, Lu WX, Pang KJ, Shu C. [Trans-jugular transcatheter closure of atrial septal defect solely under echocardiography guidance in infants]. Zhonghua Yi Xue Za Zhi 2019; 99:458-461. [PMID: 30786342 DOI: 10.3760/cma.j.issn.0376-2491.2019.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- D W Zhang
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - X B Pan
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - P Li
- Department of Cardiology, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - W B Ouyang
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - F W Zhang
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - Y Liu
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - S Z Wang
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - G Z Zhao
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - W X Lu
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - K J Pang
- Department of Echocardiography, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
| | - C Shu
- Department of Cardiovascular Surgery, Fuwai Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100037, China
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Chen Y, Chen RJ, Huang XC, Tang GX, Kuai XW, Zhang MJ, Zhang DW, Tang Q, Zhu J, Feng ZQ. [Construction of latent membrane protein 2A chimeric antigen receptor-T cells and their lethal effects on nasopharyngeal carcinoma cells]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2018; 53:925-930. [PMID: 30585005 DOI: 10.3760/cma.j.issn.1673-0860.2018.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To produce latent membrane protein 2A (LMP2A) chimeric antigen receptor (CAR)-T cells and detect the lethal effect of LMP2A CAR-T cells on nasopharyngeal carcinoma (NPC) cells. Methods: The study was conducted from September 2016 to December 2017.Genetic engineering technology was used to construct anti-LMP2A CAR lentiviral expression vector and sequencing was identified. The expression of anti-LMP2A CAR in the 293T cells was confirmed by western blot. CCK8 assay was used to evaluate the cytotoxicity of LMP2A CAR-T cells to NPC cells. ELISA assay was performed to test IL-2 and IFN-γ releasing of activated LMP2A CAR-T cells. The inhibition effect of LMP2A CAR-T cells on NPC xenograft tumor was observed in vivo. Statistical analysis was performed by statistical software SPSS 21.0. Results: The results of PCR and sequencing showed that anti-LMP2A CAR lentiviral expression vector was constructed successfully. The result of western blot indicated the expression of anti-LMP2A CAR in the 293T cells effectively. The results of CCK-8 assay showed that the killing activities of LMP2A CAR-T cells to LV-LMP2A-CNE1 cells were (72.11±9.75)%, (54.65 ±5.42)% and (36.68±3.80)% at 20∶1, 10∶1 and 5∶1 ratio of effective cells to target cells, and had a statistical difference compared to CD19 CAR-T cells and T cells (P<0.05). There was no significant difference in the killing activities of LMP2A CAR-T cells to CNE1 cells compared with CD19 CAR-T cells and T cells. The results of ELISA showed that the content of IL-2 and IFN-γ in the co-culture supernatant of LMP2A CAR-T cells and LV-LMP2A-CNE1 cells was significantly higher than that of LMP2A CAR-T cells and CNE1 cells which had statistical difference (P<0.05); In vivo experiment, the volume of LMP2A CAR-T cell group was (80.3±10.0) mm(3) which was significantly lower than that of the control groups, and the difference was statistically significant (P<0.05). Conclusion: LMP2A CAR-T cells are successfully prepared and have an obvious targeting cytotoxicity on LMP2A-positive NPC cells.
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Affiliation(s)
- Y Chen
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - R J Chen
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - X C Huang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - G X Tang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - X W Kuai
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - M J Zhang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - D W Zhang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - Q Tang
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - J Zhu
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
| | - Z Q Feng
- Department of Otorhinolaryngology, The Second Affiliated Hospital of Nanjing Medical University, Nanjing 200031, China
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Fang XM, Bai JL, Zhang DW, Su J, Zhao LL, Liu HY, Zhang YQ, Yu LY. Roseomonas globiformis sp. nov., an airborne bacteria isolated from an urban area of Beijing. Int J Syst Evol Microbiol 2018; 68:3301-3306. [PMID: 30152751 DOI: 10.1099/ijsem.0.002985] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A novel dark pink pigmented bacterium, designated strain CPCC 100847T (deposited with strain code 0113-15), was isolated from the urban air of Beijing, China. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain CPCC 100847T was related to members of the genus Roseomonas and had the highest 16S rRNA gene sequence similarity to Roseomonas aestuarii JC17T (97.5 %). A low level of DNA-DNA relatedness (18.7 %) with its closest type strain R. aestuarii JC17T (KCTC 22692T) proved that strain CPCC 100847T belonged to a unique genomic species. CPCC 100847T had many common characteristics of the genus Roseomonas, but also had a range of cultural, physiological and biochemical characteristics that separated it from related Roseomonas species. Cells were Gram-negative, cocci- to oval-shaped, non-motile, non-endospore-forming and strictly aerobic. The respiratory ubiquinone was Q-10. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, an unidentified aminolipid and an unidentified phospholipid. The major fatty acids (>5 %) were C18 : 1ω7c, anteiso-C15 : 0, C16 : 0, iso-C15 : 0 and summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c). The combined genotypic and phenotypic data indicated that the isolate represents a novel species of the genus Roseomonas. The name proposed for this species is Roseomonasglobiformis sp. nov., with CPCC 100847T (=KCTC 52094T) as the type strain. The DNA G+C composition is 65.2 mol%.
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Affiliation(s)
- Xiao-Mei Fang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
| | - Jing-Lin Bai
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
| | - De-Wu Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
| | - Jing Su
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
| | - Li-Li Zhao
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
| | - Hong-Yu Liu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
| | - Yu-Qin Zhang
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
| | - Li-Yan Yu
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, PR China
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Pang X, Zhao JY, Fang XM, Zhang T, Zhang DW, Liu HY, Su J, Cen S, Yu LY. Metabolites from the Plant Endophytic Fungus Aspergillus sp. CPCC 400735 and Their Anti-HIV Activities. J Nat Prod 2017; 80:2595-2601. [PMID: 29016131 DOI: 10.1021/acs.jnatprod.6b00878] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Thirty-three metabolites including five phenalenone derivatives (1-5), seven cytochalasins (6-12), thirteen butenolides (13-25), and eight phenyl derivatives (26-33) were isolated from Aspergillus sp. CPCC 400735 cultured on rice. The structures of all compounds were elucidated by NMR, MS, and CD experiments, of which 1-5 (asperphenalenones A-E), 6 (aspochalasin R), and 13 (aspulvinone R) were identified as new compounds. Specifically, asperphenalenones A-E (1-5) represent an unusual structure composed of a linear diterpene derivative linked to a phenalenone derivative via a C-C bond. Compounds 1, 4, 10, and 26 exhibited anti-HIV activity with IC50 values of 4.5, 2.4, 9.2, and 6.6 μM, respectively (lamivudine 0.1 μM; efavirenz, 0.4 × 10-3 μM).
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Affiliation(s)
- Xu Pang
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - Jian-Yuan Zhao
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - Xiao-Mei Fang
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - Tao Zhang
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - De-Wu Zhang
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - Hong-Yu Liu
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - Jing Su
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - Shan Cen
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
| | - Li-Yan Yu
- Institute of Medicinal Biotechnology, Academy of Medical Science & Peking Union Medical College , Beijing 100050, China
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Liu JM, Zhang DW, Du WY, Zhang M, Zhao JL, Chen RD, Xie KB, Dai JG. Four new monoterpenoids from an endophytic fungus Periconia sp. F-31. J Asian Nat Prod Res 2017; 19:541-549. [PMID: 28395517 DOI: 10.1080/10286020.2017.1313241] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 12/25/2016] [Accepted: 03/24/2017] [Indexed: 06/07/2023]
Abstract
Five monoterpenoids were isolated from the endophytic fungus Periconia sp. F-31, including three new carene-type monoterpenoids, 2-carene-5,8-diol (1), 2-carene-8,10-diol (2), 2-carene-8-acetamide (3), one new menthene-type monoterpenoid 8-hydroxy-1,7-expoxy-2-menthene (4), and one known monoterpenoid anethofuran (5). The structures of all compounds were elucidated based on a comprehensive spectroscopic data analysis, electronic circular dichroism (ECD), and calculated ECD.
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Affiliation(s)
- Ji-Mei Liu
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - De-Wu Zhang
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Wen-Yu Du
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Min Zhang
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Jin-Lian Zhao
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Ri-Dao Chen
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Ke-Bo Xie
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
| | - Jun-Gui Dai
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
- b Key Laboratory of Biosynthesis of Natural Products of National Health and Family Planning Commission , Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , China
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Liu JM, Zhang DW, Zhang M, Chen RD, Yan Z, Zhao JY, Zhao JL, Wang N, Dai JG. Periconones B–E, new meroterpenoids from endophytic fungus Periconia sp. CHINESE CHEM LETT 2017. [DOI: 10.1016/j.cclet.2016.07.031] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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15
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Zhang RK, Li GW, Zhang DW, Yu B, Feng SY. [Research of the expression of subchondral bone of Indian hedgehog with early experimental osteoarthritis induced by mechanical stress]. Zhonghua Yi Xue Za Zhi 2017; 97:53-56. [PMID: 28056292 DOI: 10.3760/cma.j.issn.0376-2491.2017.01.013] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the the expression of subchondral bone of Indian hedgehog(Ihh) with early experimental osteoarthritis induced by mechanical stress. Methods: The animals were equally divided into two groups: experimental group(E-group, n=15) and control group(S-group, n=15). The right knee joints of E-group underwent surgery, which involved in both medial collateral ligament (MCL) transaction and medial meniscectomy, while the control group was only carried out with a sham operation.The rats were killed at 1, 2 and 4 weeks postsurgery to obtain the right knee joints. Immunostaining and immunofluorescence double staining were performed to evaluate the expression of Ihh in subchondral bone, respectively. Results: The polynuclear giant cells in the subchondral bone of E-Group expressed Ihh in their cytoplasm 1 and 2 weeks post-surgery, except for 4 week, while those of S-Group appeared negative at all three time points postsurgery. There is statistically difference between the mean density of positive area of Ihh in sections of E-group and S-group both in 1 week (E-group: 0.351+ 0.086, S-group: 0.153±0.017, P<0.05) and 2 weeks (E-group: 0.303±0.026, S-group: 0.176±0.013, P<0.05), but without statistically difference in 4 weeks (E-group: 0.092±0.033, S-group: 0.136±0.014, P>0.05) post surgery. Trap positive giant cells in subchondral bone of E-group were also found Ihh positive, which indicated expression of Ihh in osteoclast . Conclusion: Ihh maybe play an important role in pathogenesis of early experimental osteoarthritis.
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Affiliation(s)
- R K Zhang
- Department of Orthopedics, the Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai 519000, China
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Wang H, Ma YY, Zhang DW, Wu BY, Fang C, Chen L. [Congenital mesoblastic nephroma: a clinicopathologic analysis of 17 cases]. Zhonghua Bing Li Xue Za Zhi 2016; 45:646-647. [PMID: 27646897 DOI: 10.3760/cma.j.issn.0529-5807.2016.09.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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17
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Wang FJ, Zhang HJ, Liang CM, Tian YL, Zhao XY, Zhang DW. Note: Decoupling design for high frequency piezoelectric ultrasonic transducers with their clamping connections. Rev Sci Instrum 2015; 86:126111. [PMID: 26724092 DOI: 10.1063/1.4939012] [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: 06/05/2023]
Abstract
This work presents the flexure-mechanism based decoupling design between high frequency piezoelectric ultrasonic transducers and their clamping connections to improve ultrasonic energy transmission efficiency. The ring, prismatic beam, and circular notched hinge based flanges were presented, and the crucial geometric dimensions of the transducers with the flexure decoupling flanges were determined. Finite element analysis (FEA) was carried out to investigate the dynamic characteristics of the transducers. Finally, experiments were conducted to examine and verify the effects of the proposed decoupling flanges. FEA and experimental results show that smaller frequency deviations and larger tip displacement amplitudes have been achieved by using the transducers with the flexure flanges compared with the transducer with a rigid ring-type flange, and thus the ultrasonic transmission efficiency can be improved through the flexure flanges.
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Affiliation(s)
- F J Wang
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
| | - H J Zhang
- Tianjin Key Laboratory of Modern Mechatronics Equipment Technology, School of Mechanical Engineering, Tianjin Polytechnic University, Tianjin 300387, China
| | - C M Liang
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
| | - Y L Tian
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
| | - X Y Zhao
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
| | - D W Zhang
- Tianjin Key Laboratory of Equipment Design and Manufacturing Technology, School of Mechanical Engineering, Tianjin University, Tianjin 300072, China
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Song XF, Hu LF, Li DH, Chen L, Sun QQ, Zhou P, Zhang DW. Electrical level of defects in single-layer two-dimensional TiO2. Sci Rep 2015; 5:15989. [PMID: 26522399 PMCID: PMC4629165 DOI: 10.1038/srep15989] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 10/06/2015] [Indexed: 11/09/2022] Open
Abstract
The remarkable properties of graphene and transition metal dichalcogenides (TMDCs) have attracted increasing attention on two-dimensional materials, but the gate oxide, one of the key components of two-dimensional electronic devices, has rarely reported. We found the single-layer oxide can be used as the two dimensional gate oxide in 2D electronic structure, such as TiO2. However, the electrical performance is seriously influenced by the defects existing in the single-layer oxide. In this paper, a nondestructive and noncontact solution based on spectroscopic ellipsometry has been used to detect the defect states and energy level of single-layer TiO2 films. By fitting the Lorentz oscillator model, the results indicate the exact position of defect energy levels depends on the estimated band gap and the charge state of the point defects of TiO2.
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Affiliation(s)
- X F Song
- ASIC&System State Key Lab, School of Microelectronics, Fudan University, Shanghai 200433, China
| | - L F Hu
- Department of Materials Science, Fudan University, Shanghai 200433, China
| | - D H Li
- Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing and Department of Optical Science and Engineering, Fudan University, Shanghai, 200433, China
| | - L Chen
- ASIC&System State Key Lab, School of Microelectronics, Fudan University, Shanghai 200433, China
| | - Q Q Sun
- ASIC&System State Key Lab, School of Microelectronics, Fudan University, Shanghai 200433, China
| | - P Zhou
- ASIC&System State Key Lab, School of Microelectronics, Fudan University, Shanghai 200433, China
| | - D W Zhang
- ASIC&System State Key Lab, School of Microelectronics, Fudan University, Shanghai 200433, China
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Zhang DW, Qiu H, Mei YM, Fu H, Zheng HG. REPAIR EFFECTS OF UMBILICAL CORD MESENCHYMAL STEM CELLS ON PODOCYTE DAMAGE OF IgA NEPHROPATHY. J BIOL REG HOMEOS AG 2015; 29:609-617. [PMID: 26403399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This study aimed to explore the influence of umbilical cord mesenchymal stem cells (UMSC) on stem cell homing and glomerular mesangial cell (GMC) after intravenous injection performed on mice tails with IgA nephropathy (IgAN) and its possible mechanism, which provide a new way and theoretical basis for the application of stem cell transplantation (SCT) in kidney disease treatment. Specific pathogen free (SPF) male Kunming mice were randomly divided into groups. A complex method applying bovine serum albumin (BSA) gavage, hypodermic injection of CCl4 and lipopolysaccharide (LPS) was used for building IgAN mice model. In addition, vascular endothelial growth factor (VEGF), connective tissue growth factor (CTGF) and cluster of differentiation (CD) 44 were observed by Masson staining and detected with immunohistochemistry (IHC) to confirm homing and location of mesenchymal stem cells (MSCs). Moreover, Western Blot was used for detecting VEGF and CTGF so as to explore the possible mechanism of applying UMSC in treating IgAN. Masson staining indicated that fibrosis degree of MSCs in treatment group was significantly lower than in negative control group after stem cell treatment. Routine urine test explained that proteinuria in treatment group were (7.15±0.31), (4.87±0.22), (2.95±0.16) g/24 h and (12.00±1.38) g/24 h in model group (P less than 0.05). MSCs were observed to be located in glomerulus and renal interstitium by IHC detection of CD44 and IHC qualitative observation of VEGF and CTGF had different positive expressions in three groups. Furthermore, different expressions of VEGF and CTGF were observed quantitatively by Western Blot. Fibrosis degree of renal tissue relieves, hematuresis and proteinuria eases and IgAN symptoms obviously improve after UMSC treatment, which hints that the treatment of HUMSC has protective effect on IgAN mice model.
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Affiliation(s)
- D W Zhang
- Department of Nephrology, General Hospital of Shenyang Military Area, Shenyang, China
| | - H Qiu
- Department of Nephrology, General Hospital of Shenyang Military Area, Shenyang, China
| | - Y M Mei
- Department of Nephrology, General Hospital of Shenyang Military Area, Shenyang, China
| | - H Fu
- Department of Nephrology, General Hospital of Shenyang Military Area, Shenyang, China
| | - H G Zheng
- Department of Nephrology, General Hospital of Shenyang Military Area, Shenyang, China
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Zhang DW, Tao XY, Chen RD, Yu LY, Dai JG. Regio-selective deglycosylation of icariin by cell suspension cultures of Glycyrrhiza uralensis and Morus alba. J Asian Nat Prod Res 2015; 17:656-661. [PMID: 26074011 DOI: 10.1080/10286020.2015.1052415] [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] [Indexed: 06/04/2023]
Abstract
Biotransformations of icariin (1) by cell suspension cultures of Glycyrrhiza uralensis and Morus alba yielded two new metabolites, icaruralins A and B (2 and 3), and one known metabolite, baohuoside I (4). Their structures were determined on the basis of extensive spectroscopic analysis. This is the first report that the cell suspension cultures of G. uralensis and M. alba possess deglycosylation functionality.
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Affiliation(s)
- De-Wu Zhang
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Beijing Key Laboratory of Non-Clinical Drug Metabolism and PK/PD Study, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100050 , China
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Abstract
A new 2-arylbenzofuran compound, 5-dehydroxy-moracin U (1), along with 10 known compounds (2-11), were isolated from cell cultures of Morus alba. Their structures were elucidated on the basis of extensive spectroscopic analyses. The anti-inflammatory activity assay of 1-8 showed that 2 and 8 exhibited significant inhibitory effect on LPS-induced NO production with the values of 76.4% and 98.7% at 10(- 5) M, respectively.
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Affiliation(s)
- De-Wu Zhang
- a State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of MateriaMedica, Chinese Academy of Medical Sciences & Peking Union Medical College , Beijing 100050 , China
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Abstract
A new spiroketallactone, epi-danshenspiroketallactone A (1) and a new C18-norditerpenoid, normiltioane (2) along with 21 known compounds, were isolated from cell cultures of Salvia miltiorrhiza. Their structures were elucidated on the basis of extensive spectroscopic analyses. In the in vitro assays, the compounds 9-11, 21-23 exhibited the significant antitumor activity with the IC(50) ranges of 1.0-8.3 µM.
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Affiliation(s)
- De-Wu Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, P.R. China
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23
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Tao XY, Zhang DW, Chen RD, Yin YZ, Zou JH, Xie D, Yang L, Wang CM, Dai JG. [Chemical constituents from cell cultures of Morus alba]. Zhongguo Zhong Yao Za Zhi 2012; 37:3738-3742. [PMID: 23627170] [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
The column chromatography on silica gel, Sephadex LH-20 and semi-preparative HPLC were used to separate and purify the compounds from the EtOAc extract of medium and MeOH extract of cell cultures of Morus alba. Eight compounds were isolated. Based on physico-chemical properties and spectroscopic data, their structures were identified as isobavachalcone (1), genistein (2), norartocarpetin (3), albanin A (4), guangsangon E (5), mulberrofuran F (6), chalcomoracin (7), kuwanon J (8). Compounds 3-6 were isolated from the cell cultures of M. alba for the first time.
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Affiliation(s)
- Xiao-Yu Tao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
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24
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Abstract
One new abietane-type norditerpenoid, named militibetin A (1), was isolated from the dry roots of Salvia miltiorrhiza, along with two known diterpenoids, yunnannin A (2) and ferruginol (3). Their structures were established by means of extensive spectroscopic analyses. In vitro, compounds 1-3 were found to show cytotoxicities against selected cancer cells, including P-388, HONE-1, and HT-29, and gave ED(50) values in the range of 2.9-5.4 μg ml(- 1).
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Affiliation(s)
- Fang Yao
- School of Pharmaceutical Science, Yantai University, Yantai, China
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25
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Abstract
Two new terpenoids, (+)-(3S,6S,7R,8S)-periconone A (1) and (-)-(1R,4R,6S,7S)-2-caren-4,8-olide (2), have been isolated from an endophytic fungus Periconia sp., which was collected from the plant Annona muricata. Their structures were elucidated on the basis of extensive spectroscopic analyses. In the in vitro assays, the two compounds showed low cytotoxic activities against six human tumor cell lines (HCT-8, Bel-7402, BGC-823, A549, A2780 and MCF-7) with IC(50)>10(-5) M.
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Affiliation(s)
- Han-Lin Ge
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines & Key Laboratory of Biosynthesis of Natural Products, Ministry of Health, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, P. R. China
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26
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Abstract
Two new norditerpenoid alkaloids, named scutebarbatines M-N (1 and 2), were isolated from the whole plant of Scutellaria barbata D. Don. Their structures were established on the basis of detailed spectral analyses. In vitro, two new compounds showed significant cytotoxic activities against three human cancer lines (HONE-1 nasopharyngeal, KB oral epidermoid carcinoma and HT29 colorectal carcinoma cells), and gave IC₅₀ values in the range of 3.5-6.3 µM.
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Affiliation(s)
- Sheng-Jun Dai
- School of Pharmaceutical Science, Yantai University, Yantai 264005, P.R. China.
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27
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Zhang DW, Yang Y, Yao F, Yu QY, Dai SJ. Solalyratins A and B, new anti-inflammatory metabolites from Solanum lyratum. J Nat Med 2011; 66:362-6. [DOI: 10.1007/s11418-011-0581-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Accepted: 08/06/2011] [Indexed: 10/17/2022]
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28
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Dai SJ, Qu GW, Yu QY, Zhang DW, Li GS. New neo-clerodane diterpenoids from Scutellaria barbata with cytotoxic activities. Fitoterapia 2010; 81:737-41. [DOI: 10.1016/j.fitote.2010.01.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2009] [Revised: 12/22/2009] [Accepted: 12/22/2009] [Indexed: 10/19/2022]
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29
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Affiliation(s)
- De-Wu Zhang
- School of Pharmaceutical Science, Yantai University
| | | | - Qun-Ying Yu
- School of Pharmaceutical Science, Yantai University
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30
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Abstract
Six new neo-clerodane diterpenoid alkaloids, named scutehenanines A-D (1, 4, 5, 6), 6-O-acetylscutehenanine A (2), and 6-O-(2-carbonyl-3-methylbutanoyl)scutehenanine A (3), were isolated from the whole plant of Scutellaria barbata. Their structures were established on the basis of detailed physical data analyses. In vitro, the six new isolated compounds showed cytotoxic activities against three human cancer lines (HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells) and gave IC50 values in the range 2.8-6.4 microM.
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MESH Headings
- Alkaloids/chemistry
- Alkaloids/pharmacology
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Diterpenes, Clerodane/chemistry
- Diterpenes, Clerodane/isolation & purification
- Diterpenes, Clerodane/pharmacology
- Drug Screening Assays, Antitumor
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/isolation & purification
- Drugs, Chinese Herbal/pharmacology
- Humans
- Inhibitory Concentration 50
- Molecular Structure
- Plants, Medicinal/chemistry
- Scutellaria/chemistry
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Affiliation(s)
- Sheng-Jun Dai
- School of Pharmaceutical Science, Yantai University, Yantai 264005, People's Republic of China.
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31
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Abstract
Two new alkaloids, named suspensine A (1) and (-)-7'-O-methylegenine (2), along with two known alkaloids, (-)-egenine (3) and (-)-bicuculline (4), were isolated from the ethanolic extract of the fruits of Forsythia suspensa. Their structures were established by means of chemical methods and spectroscopic analyses. In vitro, four alkaloids showed anti-inflammatory activities, with inhibition rates of release of beta-glucuronidase from polymorphonuclear leukocytes of rats being in the range 34.8%-39.6% at 10 microM.
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Affiliation(s)
- Sheng-Jun Dai
- School of Pharmaceutical Science, Yantai University, Yantai, PR China.
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32
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Affiliation(s)
- Yan Ren
- School of Pharmaceutical Science, Yantai University
| | - Li Shen
- Key Laboratory of Marine Drugs, Chinese Ministry of Education, Institute of Marine Drug and Food
| | - De-Wu Zhang
- School of Pharmaceutical Science, Yantai University
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33
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Dai SJ, Peng WB, Shen L, Zhang DW, Ren Y. Two new neo-clerodane diterpenoid alkaloids from Scutellaria barbata with cytotoxic activities. J Asian Nat Prod Res 2009; 11:451-456. [PMID: 19504388 DOI: 10.1080/10286020902845652] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Two new neo-clerodane diterpenoid alkaloids, scutebarbatine O (1) and 6-O-nicotinoylscutebarbatine G (2), were isolated from the whole plant of Scutellaria barbata. Their structures were elucidated by spectroscopic methods including extensive 1D and 2D NMR analyses. In vitro, compounds 1 and 2 showed cytotoxic activities against three human tumor cell lines, namely, HONE-1 nasopharyngeal, KB oral epidermoid carcinoma, and HT29 colorectal carcinoma cells, and with IC(50) values in the range of 2.1-5.7 microM.
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MESH Headings
- Alkaloids/chemistry
- Alkaloids/isolation & purification
- Alkaloids/pharmacology
- Antineoplastic Agents, Phytogenic/chemistry
- Antineoplastic Agents, Phytogenic/isolation & purification
- Antineoplastic Agents, Phytogenic/pharmacology
- Diterpenes, Clerodane/chemistry
- Diterpenes, Clerodane/isolation & purification
- Diterpenes, Clerodane/pharmacology
- Drug Screening Assays, Antitumor
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/isolation & purification
- Drugs, Chinese Herbal/pharmacology
- HT29 Cells
- Humans
- Molecular Structure
- Nuclear Magnetic Resonance, Biomolecular
- Plants, Medicinal/chemistry
- Scutellaria/chemistry
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Affiliation(s)
- Sheng-Jun Dai
- School of Pharmaceutical Science, Yantai University, Yantai, China.
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34
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Liu YQ, Xie P, Zhang DW, Wen ZR. Seasonal dynamics of microcystins with associated biotic and abiotic parameters in two bays of lake Taihu, the third largest freshwater lake in China. Bull Environ Contam Toxicol 2008; 80:24-29. [PMID: 17962897 DOI: 10.1007/s00128-007-9293-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Accepted: 10/02/2007] [Indexed: 05/25/2023]
Affiliation(s)
- Y Q Liu
- Donghu Experimental Station of Lake Ecosystems, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, People's Republic of China
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35
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Bao J, Zhang DW, Zhang JZH, Huang PL, Huang PL, Lee-Huang S. Computational study of bindings of olive leaf extract (OLE) to HIV-1 fusion protein gp41. FEBS Lett 2007; 581:2737-42. [PMID: 17537437 DOI: 10.1016/j.febslet.2007.05.029] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2007] [Revised: 05/03/2007] [Accepted: 05/09/2007] [Indexed: 10/23/2022]
Abstract
Recent experimental study found that OLE (olive leaf extract) has anti-HIV activity by blocking the HIV virus entry to host cells [Lee-Huang, S., Zhang, L., Huang, P.L., Chang, Y. and Huang, P.L. (2003) Anti-HIV activity of olive leaf extract (OLE) and modulation of host cell gene expression by HIV-1 infection and OLE treatment. Biochem. Biophys. Res. Commun. 307, 1029; Lee-Huang, S., Huang, P.L., Zhang, D., Lee, J.W., Bao, J., Sun, Y., Chang, Y.-Tae, Zhang, J.Z.H. and Huang, P.L. (2007) Discovery of small-molecule HIV-1 fusion and integrase inhibitors oleuropein and hydroxytyrosol. Biochem. Biophys. Res. Commun. 354, 872-878, 879-884]. As part of a joint experimental and theoretical effort, we report here computational study to help identify and characterize the binding complexes of several main compounds of OLE (olive leaf extract) to HIV-1 envelop protein gp41. A number of possible binding modes are found by docking oleuropein and its metabolites, aglycone, elenolic acid and hydroxytyrosol, onto the hydrophobic pocket on gp41. Detailed OLE-gp41 binding interactions and free energies of binding are obtained through molecular dynamics simulation and MM-PBSA calculation. Specific molecular interactions in our predicted OLE/gp41 complexes are identified and hydroxytyrosol is identified to be the main moiety for binding to gp41. This computational study complements the corresponding experimental investigation and helps establish a good starting point for further refinement of OLE-based gp41 inhibitors.
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Affiliation(s)
- J Bao
- Department of Chemistry, New York University, New York, NY 10003, USA
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36
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Yuan XC, Ong BH, Tan YG, Zhang DW, Irawan R, Tjin SC. Sensitivity–stability-optimized surface plasmon resonance sensing with double metal layers. ACTA ACUST UNITED AC 2006. [DOI: 10.1088/1464-4258/8/11/005] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Abstract
FAT10 is a member of the ubiquitin-like modifier family of proteins and has been implicated to play important roles in antigen presentation, cytokine response, apoptosis and mitosis. We have recently demonstrated the upregulation of FAT10 gene expression in 90% of hepatocellular carcinoma patients. Here, we identified and characterized the promoter of the FAT10 gene to elucidate the mechanism of FAT10 gene expression. Notably, we found that the 5' untranslated region (5'UTR), from the transcription start site to 15 bases before the translational start site, displays significant promoter activity. Regions upstream of the 5'UTR (from +26 to -1997) do not confer any promoter activity. Curiously, FAT10 promoter activity and expression is significantly repressed in KB3-1 and HepG2 cells, which have wild-type p53, than in p53-negative Hep3B cells. The role of p53 in regulating FAT10 expression was evident by the significant downregulation (P<0.05) of FAT10 mRNA expression and promoter activity when wild-type p53 was transfected into p53-null Hep3B cells. Conversely, inhibiting p53 expression through siRNA against p53 significantly enhanced FAT10 expression and promoter activity. p53 was found to bind in vivo to the 5' half consensus sequence of p53-binding site located at the FAT10 promoter. Hence, we propose that FAT10 is a downstream target of p53 and dysregulation of FAT10 expression in p53-defective cells could contribute to carcinogenesis.
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Affiliation(s)
- D W Zhang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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38
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Abstract
We present a systematic study of numerical accuracy of various forms of molecular caps that are employed in a recently developed molecular fractionation scheme for full quantum mechanical computation of protein-molecule interaction energy. A previously studied pentapeptide (Gly-Ser-Ala-Asp-Val) or P5 interacting with a water molecule is used as a benchmark system for numerical testing. One-dimensional potential energy curves are generated for a number of peptide-water interaction pathways. Our study shows that various forms of caps all give consistently accurate energies compared to the corresponding full system calculation with only small deviations. We also tested the accuracy of cutting peptide backbone at different positions and comparisons of results are presented.
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Affiliation(s)
- D W Zhang
- Department of Chemistry, New York University, New York, New York 10003, USA
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39
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Chen XH, Zhang DW, Zhang JZH. Fractionation of peptide with disulfide bond for quantum mechanical calculation of interaction energy with molecules. J Chem Phys 2004; 120:839-44. [PMID: 15267920 DOI: 10.1063/1.1630964] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a computational study of a recently developed molecular fractionation with conjugated caps (MFCC) method for application to peptide/protein that has disulfide bonds. Specifically, we employ the MFCC approach to generate peptide fragments in which a disulfide bond is cut and a pair of conjugated caps are inserted. The method is tested on two peptides interacting with a water molecule. The first is a dipeptide consisting of two cysteines (Cys-Cys) connected by a disulfide bond and the second is a seven amino acid peptide consisting of Gly-Cys-Gly-Gly-Gly-Cys-Gly with a disulfide cross link. One-dimensional peptide-water potential curves are computed using the MFCC method at various ab initio levels for a number of interaction geometries. The calculated interaction energies are found to be in excellent agreement with the results obtained from the corresponding full system ab initio calculations for both peptide/water systems. The current study provides further numerical support for the accuracy of the MFCC method in full quantum mechanical calculation of protein/peptide that contains disulfide bonds.
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Affiliation(s)
- X H Chen
- Department of Chemistry, New York University, New York, New York 10003, USA
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40
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Abstract
We present a novel phase with an entangled double-helix structure. Beams with this phase have the same transverse patterns as those of interference between two doughnut beams. This proposed method allows a complete set of the superpositions of the doughnut modes or the orbital angular momentum states with different topological orders to be obtained. Furthermore, it introduces a simple continuous and controlled rotation of the transverse patterns by use of a spatial light modulator. It can be used to form a three-dimensional structure by three-dimensional trapping in an optical tweezers setup or to study the quantum characteristics of an optical vortex.
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Affiliation(s)
- D W Zhang
- Photonics Research Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798
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41
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Fujimoto N, Zhang DW, Minowa K, Hanawa T, Miyauchi O, Adachi-Usami E. Relative hypersensitivity in healthy eye by frequency doubling perimetry in patients with severely damaged contralateral eye. Br J Ophthalmol 2003; 87:794. [PMID: 12770990 PMCID: PMC1771728 DOI: 10.1136/bjo.87.6.794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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42
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Abstract
We describe novel optical doughnuts for optical tweezers. With new phase functions, the proposed doughnut beams have dark cores in specified shapes. The technique can offer a simple method for creating a variety of beam shapes to match the trapped objects. One can rotate the beams directly by revolving their phase structures about their axes on the initial plane. The technique for generating the traditional Laguerre-Gaussian beam can be used to create these novel beams.
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Affiliation(s)
- D W Zhang
- School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798.
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43
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Zhang DW, Cole SP, Deeley RG. Identification of a nonconserved amino acid residue in multidrug resistance protein 1 important for determining substrate specificity: evidence for functional interaction between transmembrane helices 14 and 17. J Biol Chem 2001; 276:34966-74. [PMID: 11429411 DOI: 10.1074/jbc.m105063200] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Murine multidrug resistance protein 1 (mrp1), differs from its human ortholog (MRP1) in that it fails to confer anthracycline resistance and transports the MRP1 substrate, 17beta-estradiol 17-(beta-d-glucuronide) (E(2)17betaG), very poorly. By mutating variant residues in mrp1 to those present in MRP1, we identified Glu(1089) of MRP1 as being critical for anthracycline resistance. However, Glu(1089) mutations had no effect on E(2)17betaG transport. We have now identified a nonconserved amino acid within the highly conserved COOH-proximal transmembrane helix of MRP1/mrp1 that is important for transport of the conjugated estrogen. Converting Ala(1239) in mrp1 to Thr, as in the corresponding position (1242) in MRP1, increased E(2)17betaG transport 3-fold. Any mutation of mrp1 Ala(1239), including substitution with Thr, decreased resistance to vincristine and VP-16 without altering anthracycline resistance. However, introduction of a second murine to human mutation, Q1086E, which alone selectively increases anthracycline resistance, into mrp1A1239T restored resistance to both vincristine and VP-16. To confirm the importance of MRP1 Thr(1242) for E(2)17betaG transport and drug resistance, we mutated this residue to Ala, Cys, Ser, Leu, and Lys. These mutations decreased E(2)17betaG transport 2-fold. Conversion to Asp eliminated transport of the estrogen conjugate and also decreased leukotriene C(4) transport approximately 2-fold. The mutations also reduced the ability of MRP1 to confer resistance to all drugs tested. As with mrp1, introduction of a second mutation based on the murine sequence to create MRP1E1089Q/T1242A restored resistance to vincristine and VP-16, but not anthracyclines, without affecting transport of leukotriene C(4) and E(2)17betaG. These results demonstrate the important role of Thr(1242) for E(2)17betaG transport. They also reveal a highly specific functional relationship between nonconserved amino acids in TM helices 14 and 17 of both mrp1 and MRP1 that enables both proteins to confer similar levels of resistance to vincristine and VP-16.
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Affiliation(s)
- D W Zhang
- Cancer Research Laboratories and Department of Pathology, Queen's University, Kingston, Ontario K7L 3N6, Canada
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44
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Zhang DW, Cole SP, Deeley RG. Identification of an amino acid residue in multidrug resistance protein 1 critical for conferring resistance to anthracyclines. J Biol Chem 2001; 276:13231-9. [PMID: 11278596 DOI: 10.1074/jbc.m010008200] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Murine multidrug resistance protein 1 (mrp1), unlike human MRP1, does not confer resistance to anthracyclines. Previously, we have shown that a human/murine hybrid protein containing amino acids 959-1187 of MRP1 can confer resistance to these drugs. We have now examined the functional characteristics of mutant proteins in which we have converted individual amino acids in the comparable region of mrp1 to those present at the respective locations in MRP1. These mutations had no effect on the drug resistance profile conferred by mrp1 with the exception of converting glutamine 1086 to glutamate, as it is in the corresponding position (1089) in MRP1. This mutation created a protein that conferred resistance to doxorubicin without affecting vincristine resistance, or the ability of mrp1 to transport leukotriene C(4) (LTC(4)) and 17beta-estradiol 17-(beta-d-glucuronide) (E(2)17betaG). Furthermore, mutation Q1086D conferred the same phenotype as mutation Q1086E while the mutation Q1086N did not detectably alter the drug resistance profile of mrp1, suggesting that an anionic side chain was required for anthracycline resistance. To confirm the importance of MRP1 E1089 for conferring resistance to anthracyclines, we mutated this residue to Gln, Asp, Ala, Leu, and Lys in the human protein. The mutation E1089D showed the same phenotype as MRP1, while the E1089Q substitution markedly decreased resistance to anthracyclines without affecting LTC(4) and E(2)17betaG transport. Conversion of Glu-1089 to Asn, Ala, or Leu had a similar effect on resistance to anthracyclines, while conversion to a positive amino acid, Lys, completely eliminated resistance to anthracyclines and vincristine without affecting transport of LTC(4), E(2)17betaG, and the GSH-dependent substrate, estrone-3-sulfate. These results demonstrate that an acidic amino acid residue at position 1089 in predicted TM14 of MRP1 is critical for the ability of the protein to confer drug resistance particularly to the anthracyclines, but is not essential for its ability to transport conjugated organic anions such as LTC(4) and E(2)17betaG.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/chemistry
- ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics
- ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism
- Amino Acid Sequence
- Amino Acid Substitution
- Animals
- Antibiotics, Antineoplastic/toxicity
- Antineoplastic Agents/toxicity
- Binding Sites
- Biological Transport
- Cell Line
- Cell Membrane/metabolism
- Cell Survival/drug effects
- Doxorubicin/toxicity
- Drug Resistance, Multiple
- Estradiol/analogs & derivatives
- Estradiol/pharmacokinetics
- Estrone/analogs & derivatives
- Estrone/pharmacokinetics
- Etoposide/toxicity
- Humans
- Kinetics
- Leukotriene C4/pharmacokinetics
- Mice
- Models, Molecular
- Molecular Sequence Data
- Mutagenesis, Site-Directed
- Protein Structure, Secondary
- Recombinant Proteins/chemistry
- Recombinant Proteins/metabolism
- Transfection
- Vincristine/toxicity
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Affiliation(s)
- D W Zhang
- Cancer Research Laboratories and Department of Pathology, Queen's University, Kingston, Ontario K7L 3N6, Canada
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45
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Pan YF, Wang XY, Zhang DW, Li LH, Zheng GC. [Studies on the distribution of actin during meiotic prophase I of Nicotiana rustica L]. Shi Yan Sheng Wu Xue Bao 2000; 33:273-81. [PMID: 12549046] [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: 04/19/2023]
Abstract
The Pollen Mother Cells of Nicotiana Rustica L. were studied using the techniques of immunofluorescence microscopy and protein A-colloidal gold IEM. Immunofluorescence microscopy indicates the presence of actin in both nuclei and cytoplasm. IEM observation shows that gold particles are present in cytoplasm, chromatin and cytomictic channels. These results indicate that actin has some relation with chromatin condensing at synizesis. Moreover, actin may also play an important role in cytomixis.
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Affiliation(s)
- Y F Pan
- The Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou 730000
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46
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Feng QF, Wang M, Wang LJ, Yang ZY, Zhang YG, Zhang DW, Yin WB. A study of postoperative radiotherapy in patients with non-small-cell lung cancer: a randomized trial. Int J Radiat Oncol Biol Phys 2000; 47:925-9. [PMID: 10863061 DOI: 10.1016/s0360-3016(00)00509-5] [Citation(s) in RCA: 132] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PURPOSE To study the value of postoperative radiotherapy for non-small-cell lung cancer (NSCLC) with positive regional lymph metastases (NI or N2) after radical surgery. MATERIALS AND METHODS From February 1982 to October 1995, 366 patients with NSCLC and N1 or N2 disease were randomized into postoperative radiotherapy (S + R) (183 patients) and no further treatment (S alone) (182 patients). Postoperative radiotherapy (RT) was administrated 3-4 weeks after radical operation. Irradiated fields covered the bronchial stump, ipsilateral hilum, and most of the mediastinum. The midplane dose was 6000 cGy/30 fractions/6 weeks, with the spinal cord limited to 4000 cGy/20 fractions/4 weeks or less. One hundred thirty-four patients in S + R group and 162 patients in S alone group were evaluated. Clinical data were comparable in both arms, except for the numbers of N2 patients. RESULTS The 3-year and 5-year overall survival rates were 51.9% and 42.9% in the S + R group and 50.2% and 40.5% in the S alone Group (p = 0.56). The 3-year and 5-year disease-free survival rates were 50.7% +/- 4.7% and 42.9% +/- 5.2% in the S + R group vs. 44.4% +/- 4.3% and 38.2% +/- 4.5% in the S alone group (p = 0.28), respectively. In the patients with NI or T3-4 tumors, there was a trend toward improved survival in the S + R group, especially in the patients with T3-4N1M0. These patients demonstrated 20% improvement in overall survival (p = 0.092) and greater than 20% better disease-free survival (p = 0.057). Postoperative RT reduced local recurrence but had no impact on distant metastases. CONCLUSION Postoperative RT significantly reduced local relapses, but did not improve overall survival, due to a high frequency of distant metastases in this patient group.
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Affiliation(s)
- Q F Feng
- Departments of Radiation Oncology, Cancer Hospital/ Institute, Chinese Academy of Medical Sciences and Peking Union Medical University, Beijing, China.
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Guo LW, Gao X, Zhang DW, Wu SH, Wu HM, Li YJ, Wilson SR, Richardson CF, Schuster DI. Alkaloid-fullerene systems through photocycloaddition reactions. J Org Chem 2000; 65:3804-10. [PMID: 10864768 DOI: 10.1021/jo000156h] [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: 11/28/2022]
Abstract
The photocycloaddition of tertiary amines to ¿60fullerene (C(60)) is an interesting and useful reaction. We wished to extend the applications of this type of reaction through an investigation of the photoaddition of alkaloids to C(60) for the purpose of synthesizing novel and complex photoadducts that are difficult to obtain by usual methods. Irradiation of tazettine (2) or gramine (3) with C(60) in toluene leads to formation of one monoadduct (6 or 7), whereas scandine (1a) or 10-hydroxyscandine (1b) reacts with C(60) photochemically to give two products, the expected ¿6,6 monoadduct (5a, 5b) and a new type of monoadduct with a bis-¿6, 6 closed structure (4a, 4b). These new structures were characterized by UV-vis, FT-IR, (1)H NMR, (13)C NMR, (1)H-(1)H COSY, ROESY, HMQC (heteronuclear multiple-quantum coherence), and HMBC (heteronuclear multiple-bond connectivity) spectroscopy. The techniques of time-of-flight secondary ion MS (TOF-SIMS) and field desorption MS (FD-MS) were used for the mass determination. (3)He NMR analysis of the product mixture from photoaddition of 1a to C(60) containing a (3)He atom ((3)He@C(60)) led to two peaks at -9.091 and -11.090 ppm relative to gaseous (3)He, consistent with formation of a ¿6, 6-closed monoadduct and a bis-¿6,6 closed adduct. Presumably, the bis-¿6, 6 closed adducts are formed by an intramolecular ¿2 + 2 cycloaddition of the vinyl group to the adjacent 6,6-ring junction of C(60) after the initial photocycloaddition.
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Affiliation(s)
- L W Guo
- Department of Chemistry, New York University, New York, New York 10003, USA
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48
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Zhang ZX, Gu XZ, Yin WB, Huang GJ, Zhang DW, Zhang RG. Randomized clinical trial on the combination of preoperative irradiation and surgery in the treatment of adenocarcinoma of gastric cardia (AGC)--report on 370 patients. Int J Radiat Oncol Biol Phys 1998; 42:929-34. [PMID: 9869212 DOI: 10.1016/s0360-3016(98)00280-6] [Citation(s) in RCA: 191] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE An attempt was made to define the role of radiotherapy before operation for AGC. METHODS AND MATERIALS From January 1978 to May 1989, a prospective randomized trial on preoperative radiotherapy (R+S) vs. surgery alone (S) for AGC was carried out in 370 patients. Patients were randomized into a combined group (R+S, 171 patients) or a surgery alone group (S, 199 patients) by the envelope method. 8-MV photon or telecobalt was used for the preoperative radiation therapy, using anterior-posterior opposing parallel fields to deliver 40 Gy to the cardia, lower segment of the esophagus, fundus, lesser curvature, and hepatogastric ligament. Surgery was performed after 2 to 4 weeks rest. RESULTS The 5- and 10-year survival rates of the R+S Group and the S Alone Group were 30.10% and 19.75%, 20.26% and 13.30%, respectively. The survival curves of these two groups diverged right from the beginning after the operation over the ninth year. Statistics by Kaplan-Meier log rank test proves that the difference is significant (chi2 = 6.74, p = 0.0094). The immediate results were: resection rate 89.5% and 79.4% (p < 0.01); pathologic stage after resection T2 12.9% and 4.5% (p < 0.01), T4 40.3% and 51.3% (p < 0.05), lymph node metastasis rates 64.3% and 84.9% (p < 0.001); operative mortality rates 0.6% and 2.5%; intrathoracic leak rates 1.8% and 4.0%, respectively. The causes of failure were: local uncontrol and recurrence 38.6% vs. 51.7% (p < 0.025), regional lymph node metastasis 38.6% vs. 54.6% (p < 0.005), distant metastasis 24.3% vs. 24.7%. CONCLUSION Preoperative radiation therapy is able to improve the results of surgery for adenocarcinoma of the gastric cardia.
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Affiliation(s)
- Z X Zhang
- Department of Radiation Oncology, Cancer Institute (Hospital), Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing
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Sun Y, Zhang XR, Yin WB, Chen DF, Zhang RG, Zhang DW. Prospective multimodality treatment of SCLC--experience during the past 18 years. Gan To Kagaku Ryoho 1995; 22 Suppl 3:222-5. [PMID: 7661586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Lung cancer has been one of the leading malignancies in China. Since 1989 it has ranked first among common malignancies in the male population, and second in females. In 1975, a multimodality treatment study group for lung cancer was organized in our institute. The group has since expanded to 15 institutions in the Beijing and Tianjin area during the past four years. The present communication is based on our experiences and data, and tries to explain the treatment strategy of our study group.
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Affiliation(s)
- Y Sun
- Department of Medical Oncology, Chinese Academy of Medical Sciences, Beijing
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Paleyanda RK, Zhang DW, Hennighausen L, McKnight RA, Lubon H. Regulation of human protein C gene expression by the mouse WAP promoter. Transgenic Res 1995; 4:following table of contents. [PMID: 7795659 DOI: 10.1007/bf01968779] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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