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Gao SH, Wang GZ, Wang LP, Feng L, Zhou YC, Yu XJ, Liang F, Yang FY, Wang Z, Sun BB, Wang D, Liang LJ, Xie DW, Zhao S, Feng HP, Li X, Li KK, Tang TS, Huang YC, Wang SQ, Zhou GB. Corrigendum to "Mutations and clinical significance of calcium voltage-gated channel subunit alpha 1E (CACNA1E) in non-small cell lung cancer" [Cell Calcium 102 (2022) 102527]. Cell Calcium 2024; 119:102866. [PMID: 38428281 DOI: 10.1016/j.ceca.2024.102866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024]
Affiliation(s)
- S H Gao
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing, 100101, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - G Z Wang
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
| | - L P Wang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing, 100091, China
| | - L Feng
- Department of Pathology, Chinese PLA General Hospital, Beijing, 100853, China
| | - Y C Zhou
- Department of Thoracic Surgery, the Third Affiliated Hospital of Kunming Medical University (Yunnan Tumor Hospital), Kunming, 650106, China
| | - X J Yu
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing, 100101, China
| | - F Liang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing, 100101, China; State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - F Y Yang
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - Z Wang
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - B B Sun
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - D Wang
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - L J Liang
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - D W Xie
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China
| | - S Zhao
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing, 100101, China
| | - H P Feng
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing, 100101, China
| | - X Li
- Computer Science Department, University of North Georgia, Dahlonega, GA, 30597, United States
| | - K K Li
- Computer Science Department, University of North Georgia, Dahlonega, GA, 30597, United States
| | - T S Tang
- State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences & University of Chinese Academy of Sciences, Beijing, 100101, China
| | - Y C Huang
- Department of Thoracic Surgery, the Third Affiliated Hospital of Kunming Medical University (Yunnan Tumor Hospital), Kunming, 650106, China
| | - S Q Wang
- State Key Laboratory of Membrane Biology, College of Life Sciences, Peking University, Beijing, 100091, China
| | - G B Zhou
- State Key Laboratory of Molecular Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100021, China.
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Zhou YC, Duan SJ, Tian QL, Zhou XD, Zheng LW. [A case report of tooth agenesis, multiple dens invaginatus and taurodontism]. Zhonghua Kou Qiang Yi Xue Za Zhi 2023; 58:834-839. [PMID: 37550045 DOI: 10.3760/cma.j.cn112144-20230423-00170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Affiliation(s)
- Y C Zhou
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - S J Duan
- West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - Q L Tian
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - X D Zhou
- Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
| | - L W Zheng
- Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University & State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases, Chengdu 610041, China
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Yang PY, Jin M, Zhou YC, Duan C, Mao HW, Zhang R, Wang HM, Su Y. [Activated PI3Kδ syndrome caused by PIK3CD gene mutation complicated with germ cell tumor in a child]. Zhonghua Er Ke Za Zhi 2023; 61:562-564. [PMID: 37312472 DOI: 10.3760/cma.j.cn112140-20221012-00864] [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: 06/15/2023]
Affiliation(s)
- P Y Yang
- Medical Oncology Department, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - M Jin
- Medical Oncology Department, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - Y C Zhou
- Medical Oncology Department, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - C Duan
- Medical Oncology Department, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
| | - H W Mao
- Department of Immunology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - R Zhang
- Hematology Center, 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
| | - Y Su
- Medical Oncology Department, Pediatric Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, Key Laboratory of Major Diseases in Children, Ministry of Education, Beijing 100045, China
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Wang YY, Meng SJ, Jin WW, Lu C, Zhu QC, Zhou YC, Mou YP. [Clinical application of complete laparoscopic gastrectomy with function preservation of cardia in gastric carcinoma]. Zhonghua Yi Xue Za Zhi 2022; 102:2033-2036. [PMID: 35817730 DOI: 10.3760/cma.j.cn112137-20220313-00515] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
To investigate the feasibility and safety of total laparoscopic cardia function preserving gastrectomy for gastric carcinoma. Clinical data of 10 patients undergoing total laparoscopic cardia function preserving gastrectomy for gastric carcinoma from November 2020 to December 2021 were retrospectively collected. There were 7 males and 3 females. The mean age was (66.1±12.9) years (ranged from 38 to 86 years). All of the 10 patients were successfully performed total laparoscopic cardia function preserving gastrectomy without conversion to laparotomy. The time of digestive tract reconstruction was (24.8±3.3) min (20-30 min), and the intraoperative blood loss was (35±24) ml(20-100 ml). The time of postoperative exhaust was (2.5±0.9) days(2-3 d), the time of postoperative liquid diet was (2.25±0.87) days(2-3 d), postoperative hospital stay was (9.5±2.1) days(6-13 d). No surgical complications such as bleeding, anastomotic fistula or anastomotic stenosis occurred. Postoperative pathology showed that the proximal and distal margins of resected specimens were negative. Patients were followed up for 2 to 15 months, respectively. No death or tumor recurrence and metastasis occurred during the follow-up period. There were no symptoms of reflux after operation. Compared with total gastrectomy and proximal gastrectomy, total laparoscopic cardia function preserving gastrectomy can theoretically reduce the incidence of reflux esophagitis. We used manual suture method for digestive tract reconstruction, which can reduce the application of 2-3 stapling studs and reduce the cost of surgical materials. Compared with subtotal gastrectomy, total laparoscopic cardia function preserving gastrectomy has the advantages of more thorough lymph node dissection, with little residual gastric tissue; therefore, the blood supply is relatively better. The incidence of reflux esophagitis of total laparoscopic cardia function preserving gastrectomy for gastric cancer may was lower than total gastrectomy.
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Affiliation(s)
- Y Y Wang
- Department of General Surgery, Cancer Center, Division of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, China and Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
| | - S J Meng
- Department of General Surgery, Cancer Center, Division of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, China and Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
| | - W W Jin
- Department of General Surgery, Cancer Center, Division of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, China and Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
| | - C Lu
- Department of General Surgery, Cancer Center, Division of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, China and Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
| | - Q C Zhu
- Department of General Surgery, Cancer Center, Division of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, China and Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
| | - Y C Zhou
- Department of General Surgery, Cancer Center, Division of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, China and Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
| | - Y P Mou
- Department of General Surgery, Cancer Center, Division of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, China and Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
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Lin YP, Zhou YC, Zhang Q, Lu YN, Mei ZC, Cen YC, Zhou H, Yuan ZQ, Xie L. [Clinical epidemiological survey of primary liver cancer in Yunnan province from 2005 to 2014]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:606-611. [PMID: 36038321 DOI: 10.3760/cma.j.cn501113-20190814-00303] [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: 06/15/2023]
Abstract
Objective: To investigate the clinical characteristics and changing trends of primary liver cancer in Yunnan province from 2005 to 2014, in order to provide theoretical basis for the prevention and treatment of liver cancer in this region. Methods: A retrospective survey was used to select inpatient cases of liver cancer who were initially diagnosed and treated in our hospital from 2005 to 2014 with simple random sampling. Patients socio-demographic and clinicopathological characteristics were extracted by a unified and standardized questionnaire, and the data were statistically analyzed. Results: A total of 1000 cases with liver cancer were included, aged (53.2±11.2) years, with a male-to-female ratio of 5.99/1.00. There was no significant change in the gender and age composition ratio of patients in the past 10 years. The proportion of patients with lower education level (primary or junior high school) were increased from 21.8% to 23.4%, and the proportion of patients with relatively higher education level were decreased from 58% to 38.2% (P<0.001). Smokers and non-smokers patients were decreased and increased from 58.8% to 44.4%, and 41.2% to 55.6% (P<0.001). The proportion of drinker patients were decreased from 46.4% to 35.2%. The proportion of patients with advanced liver cancer (stage C and D) were increased, while the proportion of patients with stage A and B showed a downward trend (P<0.001). The proportion of HBsAg-positive patients showed an upward trend, that is, rising from 69% in 2005 to 82% in 2014 (P=0.043). The proportion of HBeAg-positive patients showed a steady trend (P=0.008). The use rate of ultrasound examination in patients with liver cancer were decreased from 91.0% to 58.0% (P=0.001), while the use rate of computed tomography (CT), MRI, and PET/CT examinations were increased from 81.0% to 84.0% (P=0.05), 0 to 22% (P<0.001), and 0 to 3% (P=0.026) between 2005 to 2014. The proportion of surgical patients were increased (P=0.005), but the proportion of interventional patients did not change significantly (P=0.590). Surgery and interventional therapy were the most common treatment methods, and the proportion of patients treated with surgery over the past 10 years showed an upward trend (P=0.005), while the proportion of interventional therapy remained at a high level with no significant change (P=0.590). Conclusion: In Yunnan province, the incidence of liver cancer increases with age, and the proportion of male with liver cancer is almost six times that of women. Moreover, the low positive rate of alpha-fetoprotein levels and advanced clinical stage in this region are presently the main challenges against the liver cancer prevention and treatment. The application scope of CT, magnetic resonance imaging, PET-CT and other examination methods has gradually expanded, but the treatment methods are still mainly surgery and interventional therapy.
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Affiliation(s)
- Y P Lin
- Cancer Center Office, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - Y C Zhou
- Cancer Center Office, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - Q Zhang
- Medical center, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - Y N Lu
- Cancer Center Office, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - Z C Mei
- Cancer Center Office, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - Y C Cen
- Cancer Center Office, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - H Zhou
- Cancer Center Office, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - Z Q Yuan
- Cancer Center Office, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
| | - L Xie
- Gastrointestinal Oncology, Third Affiliated Hospital of Kunming Medical University/Yunnan Cancer Hospital, Kunming 650118, China
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Zhou YC, Pang XZ, Zhu HL, He Y, Shen Y, Ma DY. [The IL-6/STAT3 signaling pathway mediated by radiotherapy regulates the expression of PD-L1 in esophageal cancer cells]. Zhonghua Zhong Liu Za Zhi 2022; 44:389-394. [PMID: 35615794 DOI: 10.3760/cma.j.cn112152-20200320-00236] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Abstract
Objective: To explore the possible mechanism of radiotherapy regulating the expression of PD-L1 in esophageal carcinoma. Methods: Three esophageal cancer cell lines (Eca109, Kyse150, TE1) were irradiated with different doses of X-rays, and 6 Gy+ AG490 group was set. The mRNA expression of PD-L1 was detected by real-time quantitative polymerase chain reaction (RT-qPCR). The protein expressions of PD-L1, STAT3, p-STAT3 were detected by western blotting and the protein level of IL-6 was detected by ELISA. Results: The mRNA expressions of PD-L1 in Eca109, Kyse150 and TE1 were 2.86±0.30, 960.01±21.27 and 106.78±6.67, higher than 1.07±0.15 in normal esophageal cell line HET-1A (P<0.01). The protein expressions of PD-L1 in Eca109, Kyse150 and TE1 were 0.091±0.036, 1.533±0.079 and 0.914±0.035, higher than 0.063±0.01 in normal esophageal cell line HET-1A (P<0.01). After 48 hours of 6 Gy irradiation, the protein expression levels of PD-L1 in Eca109, Kyse150 and TE1 were 0.135±0.007, 1.66±0.06 and 1.32±0.06, higher than 0.09±0.01, 1.21±0.05 and 0.93±0.03 of the 0 Gy group (P<0.01), while the protein expression levels of p-STAT3 in Eca109, Kyse150 and TE1 were 1.44±0.26, 0.75±0.04 and 1.92±0.17, higher than 0.18±0.05, 0.48±0.02 and 0.36±0.06 of the 0 Gy group (P<0.01). IL-6 protein expression increased significantly after different doses of irradiation (P<0.01). After the IL-6/STAT3 signaling pathway was blocked by the specific inhibitor AG490, the expressions of PD-L1 of Eca109, Kyse150 and TE1 in the 6 Gy+ AG490 groups were 0.11±0.03, 1.07±0.08 and 0.96±0.11, without significant differences of 0.09±0.01, 0.96±0.05 and 0.85±0.09 of the 0 Gy group (P>0.05), while the protein expressions of p-STAT3 were 0.76±0.11, 0.59±0.06 and 0.96±0.12, without significant differences of 0.67±0.08, 0.54±0.06 and 0.84±0.11 of the 0 Gy group (P>0.05). Conclusion: Radiotherapy may regulate the expression of PD-L1 in esophageal cancer cells through IL-6 / STAT3 signaling pathway.
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Affiliation(s)
- Y C Zhou
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - X Z Pang
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - H L Zhu
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - Y He
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - Y Shen
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
| | - D Y Ma
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nanchong 637000, China
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Zheng WH, Li C, Zhou YC, Cai T, Li J, Jiang RH, Sun CY, Shui X, Wang TQ, He YD, Ning G, Qin G. [Virtual reality-assisted management of communicated solitary fibrous tumor in skull base: a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:65-68. [PMID: 35090215 DOI: 10.3760/cma.j.cn115330-20210630-00405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- W H Zheng
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, Luzhou 646200, Sichuan Province, China
| | - C Li
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - Y C Zhou
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - T Cai
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - J Li
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - R H Jiang
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - C Y Sun
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - X Shui
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - T Q Wang
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China Department of Clinical Medicine, Chengdu Medical College, Chengdu 610041, China
| | - Y D He
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China Department of Clinical Medicine, Chengdu Medical College, Chengdu 610041, China
| | - G Ning
- Department of Head and Neck Surgery, Sichuan Cancer Hospital, Sichuan Cancer Research Institute, Sichuan Cancer Prevention and Cure Center, Cancer Hospital Affiliate to School of Medicine, Electronic Science and Technology, Chengdu 610041, China
| | - Gang Qin
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Southwest Medical University, Luzhou 646200, Sichuan Province, China
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Lu C, Jin WW, Mou YP, Zhou YC, Wang YY, Xia T, Zhu QC, Xu BW, Ren YF, Meng SJ, He YH, Jiang QT. [Clinical effect of minimally invasive duodenum preserving pancreatic head resection for benign and pre-malignant lesions of pancreatic head]. Zhonghua Wai Ke Za Zhi 2022; 60:39-45. [PMID: 34954945 DOI: 10.3760/cma.j.cn112139-20211104-00516] [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 examine the clinical effect of minimally invasive duodenum preserving pancreatic head resection(DPPHR) for benign and pre-malignant lesions of pancreatic head. Methods: The clinical data of patients with diagnosis of benign or pre-malignant pancreatic head tumor were retrospectively collected and analyzed,all of them underwent laparoscopic or robotic DPPHR between October 2015 and September 2021 at Division of Gastrointestinal and Pancreatic surgery,Zhejiang Provincial People's Hospital. Thirty-three patients were enrolled with 10 males and 23 females. The age(M(IQR)) was 54(32) years old(range: 11 to 77 years old) with body mass index of 21.9(2.9)kg/m2(range: 18.1 to 30.1 kg/m2). The presenting symptoms included abdominal pain(n=12), Whipple triad(n=2), and asymptomatic(n=19), among them there were 7 patients with hypertension and 1 patient with diabetes mellitus. There were 19 patients diagnosed as American Society of Anesthesiologists class Ⅰ and 14 patient as class Ⅱ. The student t test,U test, χ2 test or Fisher exact test was used to compare continuous data or categorized data,respectively. All the perioperative data and metabolic morbidity were analyzed and experiences on minimally invasive DPPHR was concluded. Results: Fourteen patients underwent laparoscopic DPPHR,while the rest of 19 patients received robotic DPPHR. Indocyanine green fluorescence imaging was used in 19 patients to guide operation. Five patients were performed pancreatico-gastrostomy and the rest 28 patients underwent pancreaticojejunostomy. Pathological outcomes confirmed 9 solid pseudo-papillary neoplasms, 9 intraductal papillary mucinous neoplasms, 7 serous cystic neoplasms, 6 pancreatic neuroendocrine tumors, 1 mucous cystic neoplasm, 1 chronic pancreatitis. The operative time was (309.4±50.3) minutes(range:180 to 420 minutes),and the blood loss was (97.9±48.3)ml(range:20 to 200 ml). Eighteen patients suffered from postoperative complications,including 3 patients experienced severe complications(Clavien-Dindo Grade ≥Ⅲ). Pancreatic fistula occurred in 16 patients,including 8 patients with biochemical leak,7 patients with grade B pancreatic fistula and 1 patient with grade C pancreatic fistula. No one suffered from the duodenal necrosis and none perioperative death was occurred. The length of hospital stay was 14(7) days (range:6 to 87 days). The follow-up was 22.6(24.5)months(range:2 to 74 months). None suffered from recurrence or metastasis. During the follow-up,all the patients were free of refractory cholangitis. Moreover,in the term of endocrine dysfunction,no postoperative new onset of diabetes mellitus were observed in the long-term follow-up. However,in the view of exocrine insufficiency,pancreatic exocrine insufficiency and non-alcoholic fatty liver disease (NAFLD) was complicated in 2 and 1 patient,respectively,with the supplement of pancreatic enzyme,steatorrhea and weight loss relieved,but NAFLD was awaited to be seen. Conclusions: Minimally invasive DPPHR is feasible and safe for benign or pre-malignant lesions of pancreatic head. Moreover,it is oncological equivalent to pancreaticoduodenectomy with preservation of metabolic function without refractory cholangitis.
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Affiliation(s)
- C Lu
- Department of General Surgery,Division of Gastrointestinal and Pancreatic Surgery,Zhejiang Provincial People's Hospital(People's Hospital of Hangzhou Medical College),Key Laboratory of Gastroenterology of Zhejiang Province,Hangzhou 310014,China
| | - W W Jin
- Department of General Surgery,Division of Gastrointestinal and Pancreatic Surgery,Zhejiang Provincial People's Hospital(People's Hospital of Hangzhou Medical College),Key Laboratory of Gastroenterology of Zhejiang Province,Hangzhou 310014,China
| | - Y P Mou
- Department of General Surgery,Division of Gastrointestinal and Pancreatic Surgery,Zhejiang Provincial People's Hospital(People's Hospital of Hangzhou Medical College),Key Laboratory of Gastroenterology of Zhejiang Province,Hangzhou 310014,China
| | - Y C Zhou
- Department of General Surgery,Division of Gastrointestinal and Pancreatic Surgery,Zhejiang Provincial People's Hospital(People's Hospital of Hangzhou Medical College),Key Laboratory of Gastroenterology of Zhejiang Province,Hangzhou 310014,China
| | - Y Y Wang
- Department of General Surgery,Division of Gastrointestinal and Pancreatic Surgery,Zhejiang Provincial People's Hospital(People's Hospital of Hangzhou Medical College),Key Laboratory of Gastroenterology of Zhejiang Province,Hangzhou 310014,China
| | - T Xia
- Department of General Surgery,Division of Gastrointestinal and Pancreatic Surgery,Zhejiang Provincial People's Hospital(People's Hospital of Hangzhou Medical College),Key Laboratory of Gastroenterology of Zhejiang Province,Hangzhou 310014,China
| | - Q C Zhu
- Department of General Surgery,Division of Gastrointestinal and Pancreatic Surgery,Zhejiang Provincial People's Hospital(People's Hospital of Hangzhou Medical College),Key Laboratory of Gastroenterology of Zhejiang Province,Hangzhou 310014,China
| | - B W Xu
- Bengbu Medical College,Bengbu 233030,China
| | - Y F Ren
- Zhejiang University of Traditional Chinese Medicine,Hangzhou 310053,China
| | - S J Meng
- Bengbu Medical College,Bengbu 233030,China
| | - Y H He
- Zhejiang University of Traditional Chinese Medicine,Hangzhou 310053,China
| | - Q T Jiang
- Bengbu Medical College,Bengbu 233030,China
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Zhou YC, Zhang L, Xu N, Jia CW, Huang XM, Zeng XJ. [Castleman disease presenting with polyserositis and renal impairment : a case report]. Zhonghua Nei Ke Za Zhi 2021; 60:915-917. [PMID: 34551483 DOI: 10.3760/cma.j.cn112138-20201130-00981] [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)
- Y C Zhou
- Department of General Practice/General Internal Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Zhang
- Department of Hematology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - N Xu
- Department of General Practice/General Internal Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - C W Jia
- Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X M Huang
- Department of General Practice/General Internal Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - X J Zeng
- Department of General Practice/General Internal Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Zhu QC, Jin WW, Mou YP, Zhou YC, Wang YY, Xia T, Lu C. [Clinical analysis of minimal invasive surgical treatment for pancreatic neuroendocrine tumors]. Zhonghua Yi Xue Za Zhi 2020; 100:2854-2857. [PMID: 32988146 DOI: 10.3760/cma.j.cn112137-20200217-00314] [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 analyze the safety and effectiveness of minimal invasive surgery treating pancreatic neuroendocrine tumors (pNETs), and to summarize surgical characteristics and share experience. Methods: The clinical data of 80 pNETs treated by a single hospital from January 2015 to December 2019 were retrospectively analyzed. The patients were divided into laparoscopic group and robot group. And surgical procedures included pancreaticoduodenectomy (PD), distal pancreatectomy (DP), central pancreatectomy (CP), and tumor enucleation. Results: Of 80 patients, 76 cases (95%) underwent minimal invasive surgery and 4 cases (5%) changed to open surgery. There were 38 females, with median age of 54.4 (20-80) years and median BMI (17.0-38.0) kg/m(2). Among them, 24 patients (31.6%) underwent PD, 36 patients (47.4%) underwent DP, 8 patients (10.5%) underwent CP and 8 patients (10.5%) received tumor enucleation. The postoperative incidence of grade B/C pancreatic fistula was 35.5%, the incidence of abdominal infection was 10.5%, the postoperative bleeding was 7.9%, and the reoperation rate was 6.6%, without perioperative deaths. There was no significant difference in postoperative complications among different surgical methods, including postoperative pancreatic fistula (P=0.396), postoperative bleeding (P=0.297), postoperative abdominal infection (P=0.339) and reoperation (P=0.396). Conclusions: Surgical resection is an effective treatment for pNETs. pNETs are suitable for minimally invasive surgery with earlier stage and smaller tumor diameter. Minimally invasive surgery for pNETs is safe and feasible, and functional preserving surgery could take into consideration.
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Affiliation(s)
- Q C Zhu
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital Key Laboratory of Gastroenterology of Zhejiang Province People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - W W Jin
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital Key Laboratory of Gastroenterology of Zhejiang Province People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y P Mou
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital Key Laboratory of Gastroenterology of Zhejiang Province People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y C Zhou
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital Key Laboratory of Gastroenterology of Zhejiang Province People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y Y Wang
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital Key Laboratory of Gastroenterology of Zhejiang Province People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - T Xia
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital Key Laboratory of Gastroenterology of Zhejiang Province People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - C Lu
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital Key Laboratory of Gastroenterology of Zhejiang Province People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
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Zhou YC, Lin YP, Li Q, Ma LY, Liu X, Wang XX, Li HS, Liu JX, Shen ZH, Guo YJ, Du YX, Yang RJ, Huang YC, Dai M, Zhang Q. [Analysis of EGFR mutation and clinical features of lung cancer in Yunnan]. Zhonghua Zhong Liu Za Zhi 2020; 42:729-734. [PMID: 32988154 DOI: 10.3760/cma.j.cn112152-20200313-00201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the EGFR mutation profile of lung cancer patients in Yunnan, and to provide evidence for clinical personalized treatment. Methods: Demographic and clinical data of 2 967 lung cancer patients undergoing EGFR identification were collected and analyzed from January 2014 to August 2019 in Yunnan Cancer Hospital. Results: The proportion of EGFR mutation in 2 967 patients with lung cancer was 46.2%. Univariate analysis showed that the proportion of EGFR mutation in women was higher than that in men (P<0.001) and displayed a downward trend with age (P=0.03). The mutation rate of ethnic minorities was higher than Han (P=0.012). Mutation rate in patients without smoking history was higher than those with smoking history (P<0.001), and patients without drinking history was higher than patients with drinking history (P<0.001). Mutation rate in patients without family history of lung cancer was higher than those with family history (P=0.008). The mutation rate of adenocarcinoma was higher than other pathological types (P<0.001). The mutation rate was different among stages, and it was higher in early patients than that in advanced patients (P<0.001). The mutation rate of tissue specimens was higher than those of cytology and peripheral blood samples (P<0.001). The mutation rate of Xuanwei area was lower than that in non-Xuanwei area (P<0.001). Multivariate analysis showed that gender (P<0.001), age (P=0.036), smoking history (P<0.001), pathological type (P<0.001), specimen type (P<0.001), and whether or not Xuanwei area (P<0.001) were the independent factors of EGFR mutation.The EGFR mutation was more common in female, non-smokers, adenocarcinoma, non-Xuanwei area, tissue specimen and young lung cancer patients.The mutation types of EGFR in 1 370 cases mainly included 19-Del and L858R. The predominant mutation of EGFR in Xuanwei area was L858R, while in non-Xuanwei area was 19-Del.The mutation rates of G719X, G719X+ L861Q, G719X+ S768I, and S768I in Xuanwei were higher while the mutation rates of 19-Del, L858R, and 20-ins were lower than non-Xuanwei area (P<0.05). The 19-Del mutation rate of ethnic minorities is higher than that of Han (P<0.001). The combined mutation rate of G719X, L861Q in Han was higher than that of ethnic minorities (P=0.005). Conclusions: The EGFR mutation rate in lung cancer patients in Yunnan is similar to Asian and Chinese, and higher in female, non-smokers, adenocarcinomas, young and non-Xuanwei area patients. The most common types of EGFR mutation in Yunnan are 19-Del and L858R. The predominant mutation of EGFR in Xuanwei area is L858R, while in non-Xuanwei area is 19-Del. The mutation rates of G719X, G719X+ L861Q, G719X+ S768I and S768I are higher in Xuanwei patients than those in non-Xuanwei patients. The combined mutation rate of G719X and L861Q in Han nationality is higher than that of ethnic minorities.
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Affiliation(s)
- Y C Zhou
- Molecular Diagnostic Branch Center of Yunnan Cancer Center, Yunnan Cancer Hospital, Kunming 650118, China
| | - Y P Lin
- Office of Yunnan Cancer Center, Yunnan Cancer Hospital, Kunming 650118, China
| | - Q Li
- Molecular Diagnostic Branch Center of Yunnan Cancer Center, Yunnan Cancer Hospital, Kunming 650118, China
| | - L Y Ma
- Molecular Diagnostic Branch Center of Yunnan Cancer Center, Yunnan Cancer Hospital, Kunming 650118, China
| | - X Liu
- Molecular Diagnostic Branch Center of Yunnan Cancer Center, Yunnan Cancer Hospital, Kunming 650118, China
| | - X X Wang
- Yunnan Provincial Key Laboratory of Lung Cancer, Kunming 650118, China
| | - H S Li
- Yunnan Provincial Key Laboratory of Lung Cancer, Kunming 650118, China
| | - J X Liu
- Yunnan Provincial Key Laboratory of Lung Cancer, Kunming 650118, China
| | - Z H Shen
- Office of Yunnan Cancer Center, Yunnan Cancer Hospital, Kunming 650118, China
| | - Y J Guo
- Plateau Regional High-Rise Cancer International Cooperation Laboratory of Ministry of Education, Kunming 650118, China
| | - Y X Du
- Plateau Regional High-Rise Cancer International Cooperation Laboratory of Ministry of Education, Kunming 650118, China
| | - R J Yang
- Yunnan Provincial Key Laboratory of Lung Cancer, Kunming 650118, China
| | - Y C Huang
- Molecular Diagnostic Branch Center of Yunnan Cancer Center, Yunnan Cancer Hospital, Kunming 650118, China
| | - M Dai
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Q Zhang
- Medical Center, Yunnan Cancer Hospital, Kunming 650118, China
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Zhou YC, Xia T, Mou YP, Lu C, Jin WW, Wu XS, Shao HL, Wang YY. [Laparoscopic gastroduodenostomy with manual suture for Billroth Ⅰ anastomosis: a report of 36 cases]. Zhonghua Wai Ke Za Zhi 2020; 58:383-387. [PMID: 32393006 DOI: 10.3760/cma.j.cn112139-20191119-00566] [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 examine the clinical efficiency of laparoscopic gastroduodenostomy with BillrothⅠanastomosis with manual suture. Methods: The clinic data of 36 patients with gastric cancer who underwent laparoscopic gastroduodenostomy with Billroth Ⅰ anastomosis from November 2017 to September 2019 in Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital were analyzed retrospectively.There were 22 males and 14 females, aged (64.3±9.3) years(range: 43 to 80 years), underwent complete laparoscopic gastroduodenostomy. The laparoscopic manual suture was used for Billroth Ⅰ anastomosis. Results: All the laparoscopic radical gastrectomy and manual suturing gastroduodenostomy were successfully performed. The operation time was (226.7±40.4) minutes (range: 180 to 320 minutes), including (24.8±7.1) minutes (range: 15 to 48 minutes) for gastroduodenostomy.There was (3.8±0.9) days (range: 2 to 6 days) for anal exhaust, (5.7±2.0) days (range: 3 to 13 days) for extubation of gastric tube, and (10.3±3.1) days (range: 7 to 19 days) for hospitalization. There was no death in perioperative period. Postoperative pathological report showed 3 cases of highly differentiated adenocarcinoma, 5 cases of moderately differentiated adenocarcinoma, 22 cases of poorly differentiated adenocarcinoma and 6 cases of signet ring cell carcinoma, including 27 cases in T1 stage and 9 cases in T2 stage. The number of lymph nodes harvested was 36.4±8.9 (range: 23 to 60). Lymph node metastasis was positive in 7 cases and negative in 29 cases. TNM stage included 24 cases in ⅠA stage, 8 cases in ⅠB stage and 4 cases in Ⅱ stage. After the operation, the upper digestive tract radiography showed that the anastomosis opening was unobstructed without complications such as anastomotic stenosis. Conclusion: Laparoscopic gastroduodenostomy with Billroth Ⅰ anastomosis with manual suture is safe and feasible, has a good short-term effect.
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Affiliation(s)
- Y C Zhou
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - T Xia
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y P Mou
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - C Lu
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - W W Jin
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - X S Wu
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - H L Shao
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y Y Wang
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
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Yang SY, Liu Y, Mao J, Wu YB, Deng YL, Qi SC, Zhou YC, Gong SQ. The antibiofilm and collagen-stabilizing effects of proanthocyanidin as an auxiliary endodontic irrigant. Int Endod J 2020; 53:824-833. [PMID: 32053733 DOI: 10.1111/iej.13280] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 02/11/2020] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the antibiofilm effect of proanthocyanidin (PA) solution as an irrigant against Enterococcus faecalis (E. faecalis) and its influence on the mechanical properties and biodegradation resistance of demineralized root dentine. METHODOLOGY Enterococcus faecalis were introduced into human root dentine tubules by a serial centrifugation method and grown for 1 week. Dentine blocks infected with 1-week-old E. faecalis biofilms were treated with the following irrigants: sterile water (control), 2% chlorhexidine (CHX), 2% PA, 5% PA and 10% PA. After treatment, the live and dead bacteria proportions within E. faecalis biofilms were analysed using confocal laser scanning microscopy. To evaluate the biostability of fully demineralized dentine treated by the aforementioned irrigants, the elastic modulus and hydroxyproline release of human dentine incubated in collagenase solution were tested at baseline, after irrigant treatment and after biodegradation, respectively. Furthermore, the surface chemical bond of demineralized dentine collagen treated by various irrigants was characterized by X-ray photoelectron spectroscopy (XPS). Statistical analysis was performed using one-way anova and Tukey's post hoc multiple comparisons with the significance level at 5%. RESULTS The proportion of dead E. faecalis volume was significantly higher in the PA and CHX groups than that in the control group (P < 0.05). PA irrigation significantly increased the mechanical properties of demineralized dentine (P < 0.05), and the effect was enhanced with increasing PA concentration. CHX and PA groups had significantly less elasticity loss and hydroxyproline release (P < 0.05). The biomodification of dentine collagen by PA was verified by increased C-O/C-N peak percentage under C1s and C-O peak percentage under O1s narrow-scan XPS spectra. CONCLUSIONS Proanthocyanidin killed E. faecalis within biofilms and enhanced the biostability of the collagen matrix of demineralized root dentine. It might be used as an auxiliary endodontic irrigant with antibiofilm and collagen-stabilizing effects.
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Affiliation(s)
- S Y Yang
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology, Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Liu
- Laboratory of Biomimetic Nanomaterials, Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, China
| | - J Mao
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y B Wu
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y L Deng
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - S C Qi
- Department of Stomatology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Y C Zhou
- The Stony Brook School, Stony Brook, NY, USA
| | - S Q Gong
- Center of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Fan HJ, Huang C, Su Y, Wang XD, Zhou YC, Duan C, Zhao W, Zhao Q, Jin M, Ma XL. [Clinical characteristics and prognosis of high-risk neuroblastoma with bone marrow metastasis in children]. Zhonghua Er Ke Za Zhi 2019; 57:863-869. [PMID: 31665841 DOI: 10.3760/cma.j.issn.0578-1310.2019.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the clinical characteristics of newly treated high-risk group neuroblastoma (NB) patients with bone marrow metastasis and to explore the prognostic factors. Methods: The clinical features (sex, age, stage, risk group, pathological type, metastatic site, etc.) of 203 newly treated high-risk NB patients with bone marrow metastasis admitted to Hematology Oncology Center, Beijing Children's Hospital from January 2007 to December 2016 were analyzed retrospectively. There were 118 males (58.1%) and 85 females (41.9%). Kaplan-Meier method was used for survival analysis and Cox regression was used to analyze the prognostic factors. Results: The age at onset of the 203 patients was 41 months (9-147 months). The metastatic sites at diagnosis were as follows: bone in 195 cases (96.1%), distant lymph nodes in 104 cases (51.2%), skull and endomeninx in 61 cases (30.0%), orbit in 30 cases (14.8%), pleura in 16 cases (7.9%), liver in 13 cases(6.4%), canalis spinalis in 13 cases (6.4%), other sites in 11 cases (5.4%) and skin and soft tissue in 10 cases (4.9%). In all, 194 cases were enrolled for prognostic analysis. The follow-up time was 36 months (1 day-138 months) , and the 5-years event free survival (EFS) and overall survival (OS) were 36.1% and 39.7%, respectively. A total of 118 patients (60.8%) had events (first relapse or death) with the time to event occurrence was 15 months (1 day-72 months), whereas 112 patients (57.7%) died with the event occurrence to death time was 3 months (1 day-21 months). There was no significant difference in 5-years OS between radiotherapy group and non-radiotherapy group (42.3% vs. 38.3%, χ(2)=3.671, P=0.055). The 5-years OS in transplantation group was significantly better than the non-transplantation group (44.3% vs. 35.5%, χ(2)=8.878, P=0.003), and the radiotherapy combined transplantation group also had a better 5-years OS rate than the non-radiotherapy combined transplantation group (45.8% vs. 37.3%, χ(2)=5.945, P=0.015). Univariate survival analysis showed lactate dehydrogenase ≥ 1 500 U/L, the amplification of MYCN, the metastatic sites of orbit, canalis spinalis and pleura were associated with poor prognosis of newly diagnosed high-risk NB patients (χ(2)=21.064, 13.601, 3.998, 6.183, 15.307, all P<0.05). The amplification of MYCN and the metastatic sites of pleura were risk factors for prognosis of newly diagnosed high-risk NB patients by Cox regression models (HR=1.896,1.100, 95%CI: 1.113-3.231, 1.020-1.187, both P<0.05). Conclusions: The prognosis is unfavorable in high-risk group NB patients with BM metastasis. Radiotherapy combined with transplantation can further improve the prognosis of these patients. The amplification of MYCN and the metastatic sites of pleura were the poor prognostic factors for high-risk NB patients with bone marrow metastasis.
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Affiliation(s)
- H J Fan
- Hematology Oncology Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing Key Laboratory of Pediatric Hematology Oncology, National Discipline of Pediatrics, Ministry of Education, MOE Key Laboratory of Major Diseases in Children, Beijing 100045, China
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Qian ZY, Wen Y, Lou GC, Zhang J, Wang YY, Jin WW, Zhou YC, Mou YP. [Preliminary application of endoscopic titanium clip localization combined with three-dimensional CT reconstruction in the determination of resection margin of gastric central cancer under laparoscopy]. Zhonghua Wai Ke Za Zhi 2019; 57:38-43. [PMID: 31510731 DOI: 10.3760/cma.j.issn.0529-5815.2019.10.008] [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 evaluate the accuracy of endoscopic titanium clip localization combined with CT three-dimensional reconstruction for the control of incision margin in early gastric cancer under laparoscopy. Methods: A prospective analysis was made for gastric cancer whose lesions were located in the middle of the stomach and T stage was 1 to 2 from October 2017 to January 2019 at Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital. Totally 25 patients were eventually enrolled in the study. There were 17 males and 8 females aging of (63.6± 7.2) years (range: 48 to 77 years). All cases were treated with titanium clip localization under endoscope combined with CT three-dimensional (3D) reconstruction to construct a virtual panorama of gastric cavity and lesions, and to design surgical margins. Laparoscopic surgical resection was performed according to the surgical margins designed before operation. The distance from the gastric angle to the origin of the minor curvature of the incisional margin, the distance from the gastric angle to the the center of lesion and the distance of the upper incision margin were measured under three-dimensional CT reconstruction and under actual specimen. Paired t test was used to compare the three distances measured by two methods. Results: The measured distances from the gastric angle to the center of the lesion and the proximal incisional margin under 3D reconstruction CT were according to the measured values of actual specimens ((2.67±1.38) cm vs. (2.83±1.56) cm, t=1.51, P=0.14; (5.23±0.60) cm vs. 5 cm, t=1.93, P=0.07); the measured distances from the gastric angle to the origin of the minor curvature of the incisional margin under CT 3D reconstruction were different with the measured values of solid specimens ((5.94±0.94) cm vs. (6.37±0.90) cm, t=3.52, P=0.00). Conclusion: The method of titanium clip localization combined with CT 3D reconstruction can provide a feasible laparoscopic localization method and incision edge solution for T1 to 2 gastric central cancer.
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Affiliation(s)
- Z Y Qian
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y Wen
- Department of Radiology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - G C Lou
- Department of Gastroenterology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - J Zhang
- Department of Gastroenterology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y Y Wang
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - W W Jin
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y C Zhou
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
| | - Y P Mou
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou 310014, China
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Xu XW, Zhang RC, Mou YP, Qian ZY, Huang CJ, Zhu QC, Jin WW, Zhou YC. [Laparoscopic radical antegrade modular pancreatosplenectomy for left-sided pancreatic adenocarcinoma: analysis of 12 cases]. Zhonghua Wai Ke Za Zhi 2019. [PMID: 29534416 DOI: 10.3760/cma.j.issn.0529-5815.2018.03.009] [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 evaluate the safety and feasibility of laparoscopic radical antegrade modular pancreatosplenectomy(Lap-RAMPS) for left-sided pancreatic adenocarcinoma. Methods: Clinical data of total 12 patients underwent Lap-RAMPS for left-sided pancreatic adenocarcinoma at Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital from March 2016 to August 2017 were reviewed retrospectively.There were 7 male patients and 5 female patients, with median age of 60.5 years old(47-68 years old). Abdominal enhanced CT, pancreatic MRI, PET-CT were performed on all patients to evaluate the lesion and exclude metastasis.Follow-up were done with out-patient clinic or telephone consultancy until October 2017. Results: All patients underwent pure Lap-RAMPS.The medium operative time was 250 minutes(180-445 minutes), and the blood loss was 150 ml(50-500 ml). The medium first flatus time and diet resumption time were 3.0 days(1-5 days) and 3.5 days(1-7 days) respectively.The medium postoperative hospital stay was 9 days(4-18 days). Morbidity occurred in 8 patients with gastric empty delay(n=1), bleeding(n=1), fluid collection(n=3). There was no mortality.The medium overall number of retrived lymph nodes was 15.6 and the positive rate was 41.7%. The R0 rate was 100%.The medium follow-up was 10 months.One patient was diagnosed as liver metastasis after 8 months and accepted chemotherapy.One patient died after 14 months for tumor recurrence and metastasis.Others survived without tumor recurrence or metasitasis. Conclusion: Lap-RAMPS is safe and feasible with accepted oncological outcomes for selected left side pancreatic adenocarcinoma under skilled hands.
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Affiliation(s)
- X W Xu
- Department of Gastrointestinal and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Key Laboratory of Gastroenterology of Zhejiang Province, Hangzhou 310014, China
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Lu C, Jin WW, Mou YP, Zhou YC, Zhu QC, Shao HL, Chen K, Li SD. [Experience on postoperative complications of laparoscopic pancreaticoduodenectomy]. Zhonghua Wai Ke Za Zhi 2018; 56:822-827. [PMID: 30392301 DOI: 10.3760/cma.j.issn.0529-5815.2018.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To summarize the incidence and characteristics of postoperative complications after laparoscopic pancreaticoduodenectomy(LPD), and to share our experience on management of complications. Methods: The clinical data of 320 LPD performed by a single team in Sir Run Run Shaw Hospital and Zhejiang Provincial People's Hospital between September 2012 and September 2017 were retrospectively analyzed, among which there were 196 males and 124 females with age of (60.2±11.6) years old.There were 306 patients who underwent standard LPD, and 14 patients who underwent extended LPD. The patients were divided into 2 groups of former 160 LPD and later 160 LPD according to the time order. By analyzing the differences of clinical outcomes between the two groups, especially focusing on the incidence of postoperative complications.The experience on management of complications was concluded. The prior surgical history of latter group was significantly higher than the former group(30.0%(48/160)vs. 18.8%(30/160), χ(2)=5.49, P=0.019), and the rest of baseline characteristics remained the comparable (P>0.05). For resectable lesions, LPD was performed by "No back" approach, following the principle of "From distal to cephalad, from ventral to dorsal, and from left to right" . As for the borderline resectable patients, LPD was performed by "Easy first" strategy. Student t test, χ(2) test or Fisher test was used to analyzed the data between the two groups respectively. Results: Of 320 LPD patients, 306 cases underwent standard LPD, 14 cases underwent LPD with resection of other organs.There were 278 LPD cases who followed "No back" approach, and 42 cases who followed "Easy first" strategy because of difficulty in creating the retro-pancreatic tunnel. And the overall morbidity was 32.2%(103/320) with reoperation rate of 5.3%(17/320). The perioperative mortality was 0.6%(2/320). The operation time of latter group was ((346.6±48.8)minutes), which was shorter than that of former group((358.0±54.4)minutes)(t=1.97, P=0.048). The blood loss of former and latter group remained comparable((207.9±135.8)ml vs.(189.6±121.4)ml, P=0.205). However, in subgroup analysis, the patients with blood loss less <200 ml of latter group decreased significantly from 59.4%(95/160) to 47.5%(76/160)(χ(2)=4.53, P=0.033). The overall morbidity of latter group was 28.8%(46/160), indicated a decrease from 35.6%(57/160) of former group without significant difference(P=0.188). Moreover, Grade A/B/C pancreatic fistula rate, Grade A/C bile leakage rate, Grade B/C postoperative hemorrhage rate of the later group tended to decrease, although they also didn't reach a significant difference. However, the abdominal infection rate decreased significantly(χ(2)=3.93, P=0.047). The length of hospital stay remained comparable(P=0.156). Conclusions: The most common complications after LPD were postoperative hemorrhage and pancreatic fistula. With specialized team and accumulated experience, the morbidity can decrease progressively by analyzing the leading cause and improving the technical skills.
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Affiliation(s)
- C Lu
- Department of Gastroenterology and Pancreatic Surgery, Zhejiang Provincial People's Hospital, Hangzhou 310014, China
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Aras BS, Zhou YC, Dawes A, Chou CS. The importance of mechanical constraints for proper polarization and psuedo-cleavage furrow generation in the early Caenorhabditis elegans embryo. PLoS Comput Biol 2018; 14:e1006294. [PMID: 29985915 PMCID: PMC6053242 DOI: 10.1371/journal.pcbi.1006294] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 12/01/2017] [Revised: 07/19/2018] [Accepted: 06/11/2018] [Indexed: 12/26/2022] Open
Abstract
Intracellular polarization, where a cell specifies a spatial axis by segregation of specific factors, is a fundamental biological process. In the early embryo of the nematode worm Caenorhabditis elegans (C. elegans), polarization is often accompanied by deformations of the cortex, a highly contractile structure consisting of actin filaments cross-linked by the motor protein myosin (actomyosin). It has been suggested that the eggshell surrounding the early embryo plays a role in polarization although its function is not understood. Here we develop a mathematical model which couples a reaction-diffusion model of actomyosin dynamics with a phase field model of the cell cortex to implicitly track cell shape changes in the early C. elegans embryo. We investigate the potential rigidity effect of the geometric constraint imposed by the presence and size of the eggshell on polarization dynamics. Our model suggests that the geometric constraint of the eggshell is essential for proper polarization and the size of the eggshell also affects the dynamics of polarization. Therefore, we conclude that geometric constraint on a cell might affect the dynamics of a biochemical process. Polarization, whereby molecules and proteins are asymmetrically distributed throughout the cell, is a vital process for many cellular functions. In the early C. elegans embryo the asymmetric distribution of cell cytoskeleton during the initiation of polarization leads to asymmetric contractions which are higher in the anterior and lower in the posterior of a cell. The C. elegans embryo is surrounded by a rigid body, the eggshell, which functions in numerous cell processes. We investigate the structural support of eggshell during the establishment phase by tracking the moving cell surface. We incorporate protein dynamics involved in polarization into the membrane evolution. We conclude that eggshell might have a role in cell polarization by preventing the distortion of cell surface.
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Affiliation(s)
- Betül Senay Aras
- Department of Mathematics, The Ohio State University, Columbus, Ohio, United States of America
| | - Y C Zhou
- Department of Mathematics, Colorado State University, Fort Collins, Colorado, United States of America
| | - Adriana Dawes
- Department of Mathematics, The Ohio State University, Columbus, Ohio, United States of America.,Department of Molecular Genetics, The Ohio State University, Columbus, Ohio, United States of America
| | - Ching-Shan Chou
- Department of Mathematics, The Ohio State University, Columbus, Ohio, United States of America
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Jin WW, Lu C, Mou YP, Xu XW, Zhang RC, Zhou YC, Qian ZY, Huang CJ. [Strategy in management of adjacent organ lesion during laparoscopic pancreaticoduodenectomy]. Zhonghua Wai Ke Za Zhi 2018; 56:522-527. [PMID: 30032534 DOI: 10.3760/cma.j.issn.0529-5815.2018.07.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the safety and feasible of adjacent organ resection during laparoscopic pancreaticoduodenectomy(LPD), and summary the surgical strategies. Methods: Clinical data of 15 adjacent organ resections combined with LPD from March 2013 to September 2017 were reviewed.There were 10 male and 5 female patients aging from 20 to 86 years, and the body mass index ranged from 19.6 to 34.5 kg/m(2).Two patients had previous abdominal surgical history.Two patients underwent preoperative chemotherapy. Results: The resected adjacent organs included liver(n=4), stomach(n=3), colon(n=6), right kidney with embolectomy and vasoplastic of inferior vena cava(n=1), and spleen artery aneurysms(n=1). The operative time ranged from 280 to 450 minutes, and the blood loss ranged from 100 to 450 ml.The total complication rate was 5/15 and no one died in 90 days after surgery.The postoperative hospital stay ranged from 10 to 42 days with medium 18 days.The pathology included adenocarcinoma of stomach and duodenum(n=1), gastric cancer invading pancreas or duodenum(n=2), ampullary adenocarcinoma with left hepatolithiasis(n=1), ampullary adenocarcinoma with a benign lesion in left liver(n=1), ampullary adenocarcinoma with single liver metastasis(n=1), ampullary adenocarcinoma(n=1), pancreatic intraductal papillary mucinous neoplasm with splenic artery aneurysms(n=1), pancreatic neuroendocrine neoplasm with colon cancer(n=1), distal common bile duct adenocarcinoma involving righ hepatic duct(n=1), pancreatic neuroendocrine neoplasm invading inferior vena cava and right renal vein(n=1), duodenal adnocarcinoma(n=1), duodenal ewing's sarcoma(n=1), duodenal intesititialoma(n=2). The follow-up was from 3 to 40 months with the medium survival of 17.5 months. Conclusions: The oncological outcomes of PD combined with adjacent organ resection is acceptable.Surgical treatment for those patients with periampullary neoplasma and adjacent organ lesions should be aggressive.
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Affiliation(s)
- W W Jin
- Department of Gastrointestinal and Pancreatic Surgery, Key Laboratory of Gastroenterology of Zhejiang Province, Zhejiang Provincial People's Hospital, Hangzhou 310014, China
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Li HY, Zhou YC, Zhou XD, Zheng LW. [Pharmacokinetics and drug safety of oral infectious disease during pregnancy]. Hua Xi Kou Qiang Yi Xue Za Zhi 2018; 36:319-324. [PMID: 29984936 PMCID: PMC7030287 DOI: 10.7518/hxkq.2018.03.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 12/29/2017] [Indexed: 02/05/2023]
Abstract
Pregnancy is a time of particular vulnerability in terms of physiologic changes resulting in higher risk of oral infectious diseases. There is emerging evidence showing that irrational dental treatment and drug therapy are associated with adverse pregnancy outcomes, including infant malformation or spontaneous abortion. This article reviews the pharmacokinetics of medications in pregnant women and the fetus and introduces a guideline for drug therapy and common dental drugs used during pregnancy.
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Affiliation(s)
- Hong-Yu Li
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Ya-Chuan Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Xue-Dong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
| | - Li-Wei Zheng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Dept. of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, China
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Abstract
This work presents a mathematical model for the localization of multiple species of diffusion molecules on membrane surfaces. Morphological change of bilayer membrane in vivo is generally modulated by proteins. Most of these modulations are associated with the localization of related proteins in the crowded lipid environments. We start with the energetic description of the distributions of molecules on curved membrane surface, and define the spontaneous curvature of bilayer membrane as a function of the molecule concentrations on membrane surfaces. A drift-diffusion equation governs the gradient flow of the surface molecule concentrations. We recast the energetic formulation and the related governing equations by using an Eulerian phase field description to define membrane morphology. Computational simulations with the proposed mathematical model and related numerical techniques predict (i) the molecular localization on static membrane surfaces at locations with preferred mean curvatures, and (ii) the generation of preferred mean curvature which in turn drives the molecular localization.
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Affiliation(s)
- Michael Mikucki
- Department of Applied Mathematics & Statistics, Colorado School of Mines, Golden, Colorado, 80401-1887
| | - Y C Zhou
- Department of Mathematics, Colorado State University, Fort Collins, Colorado, 80523-1874
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Jin WW, Xu XW, Mou YP, Zhou YC, Zhang RC, Yan JF, Zhou JY, Huang CJ, Lu C. [Laparoscopic pancreaticoduodenectomy: a report of 233 cases by a single team]. Zhonghua Wai Ke Za Zhi 2017; 55:354-358. [PMID: 28464575 DOI: 10.3760/cma.j.issn.0529-5815.2017.05.009] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To summary the experience of 233 cases of laparoscopic pancreaticoduodenectomy (LPD) performed by a single surgical team. Methods: Data of patients undergoing LPD from September 2012 to October 2016 were reviewed. There were 145 males and 88 females with the mean age of(60.3±13.0)years old, ranging from 19 to 92 years old, and the mean body mass index of (22.8±3.5)kg/m(2,) ranging from 16.3 to 36.8 kg/m(2). There were 195 patients with clinical manifestation and 54 patients who had the history of abdominal surgery. Results: LPD were performed on 233 patients by same surgical team consecutively. The mean operative time was(368.0±57.4)minutes. Mean blood loss was(203.8±138.6)ml. The postoperative morbidity rate was 33.5%, with 6.9% of grade B or C pancreatic fistula and 9.9% of bleeding. The reoperation rate was 5.6%. The mortality during 30 days after operation was 0.9%. Mean postoperative hospital stay was (18.1±11.2)days. Mean tumor size was (3.9±2.4)cm, and the mean number of lymph nodes harvested was 21.3±11.9.One hundred and sixty-three patients were diagnosed as malignant tumor, including pancreatic adenocarcinoma(n=84), cholangiocarcinoma(n=17), ampullary adenocarcinoma(n=55), duodenal adenocarcinoma(n=5), gastric cancer(n=1)and duel cancer (n=1) located in distal stomach and duodenum. Conclusion: The key point to make laparoscopic pancreaticduodenectomy a routine safe procedure is to operate the procedure under skilled hands in selected patients via suitable surgical approaches.
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Affiliation(s)
- W W Jin
- Department of Gastro-entero-pancreatic, Zhejiang Provincial People's Hospital, Hangzhou 310014, China
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Wang X, Zhou YC, Huang YC, Zou TN, Lü ZY, Chen Y, Liu X, Duan WS. [Estradiol stimulates the growth and biofilm formation of clinical Staphylococcus epidermidis]. Zhonghua Yi Xue Za Zhi 2016; 96:3083-3089. [PMID: 27784450 DOI: 10.3760/cma.j.issn.0376-2491.2016.38.010] [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 effect of steroid hormones on the growth and biofilm formation of S. epidermidis. Methods: In all experiments, two S. epidermidis standard strains (ATCC12228 and ATCC35984) and two S. epidermidis clinical strains (SE101 and SE40) were incubated on the surface of silica gel in estradiol concentrations of 0, 50, 125, 250 and 500 pmol/L at 4, 6, 12, 24, 48 and 72 hours. Growth curve were drawn by means of the OD value. Formed biofilms were assessed by crystal violet staining methods. In order to observe the processes and structures of biofilm, the confocal laser scanning microscopy (CLSM) and scanning electron microscope (SEM) were used. Results: All of the four strains which were incubated with the concentrations of 125 pmol/L of estradiol had entered the logarithmic growth stage ahead of the blank control (3 h and 4 h). Crystal violet staining indicated that there was no biofilm for ATCC12228. Improved primary attachment abilities were found for ATCC35984 and SE101 in the presence of estradiol, and the OD values were 0 pmol/L (0.081±0.015 and 0.082±0.011), 50 pmol /L (0.087±0.013 and 0.088±0.010), 125 pmol/L (0.175±0.052 and 0.091±0.012), 250 pmol/L (0.153±0.036 and 0.090±0.006), 500 pmol/L (0.157±0.050 and 0.082±0.032), respectively. The thickness of biofilm reached the peak in 125 pmol/L estradiol at 24 h. CLSM and SEM found estradiol promoted the biofilm maturity and the biofilm of 125 pmol/L group was denser and thicker than that of the other concentration groups. Conclusions: Our in vitro experiments indicate that estradiol could promote the growth of S. epidermidis which exit on the surface of silica gel, and improve the ability of biofilm formation of S. epidermidis.
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Affiliation(s)
- X Wang
- Department of Breast Surgery 1 Ward, Third Affiliated Hospital of Kunming Medical University, the Tumor Hospital of Yunnan Province, Kunming 650118, China
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Zhang DM, Cui DX, Xu RS, Zhou YC, Zheng LW, Liu P, Zhou XD. Phenotypic research on senile osteoporosis caused by SIRT6 deficiency. Int J Oral Sci 2016; 8:84-92. [PMID: 27357320 PMCID: PMC4932771 DOI: 10.1038/ijos.2015.57] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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] [Accepted: 12/03/2015] [Indexed: 02/05/2023] Open
Abstract
Osteoporosis is a serious public bone metabolic disease. However, the mechanisms underlying bone loss combined with ageing, which is known as senile osteoporosis, remains unknown. Here we show the detailed phenotype of this disease caused by SIRT6 knock out (KO) in mice. To the best of our knowledge, this is the first study to reveal that SIRT6 is expressed in both bone marrow stroma cells and bone-related cells in both mouse and human models, which suggests that SIRT6 is an important regulator in bone metabolism. SIRT6-KO mice exhibit a significant decrease in body weight and remarkable dwarfism. The skeleton of the SIRT6-KO mouse is deficient in cartilage and mineralized bone tissue. Moreover, the osteocalcin concentration in blood is lower, which suggests that bone mass is markedly lost. Besides, the tartrate-resistant acid phosphatase 5b (TRAP5b) concentration is much higher, which suggests that bone resorption is overactive. Both trabecular and cortical bones exhibit severe osteopenia, and the bone mineral density is decreased. Moreover, double-labelling analysis shows that bone formation is much slower. To determine whether SIRT6 directly regulates bone metabolism, we cultured primary bone marrow stromal cells for osteogenesis and osteoclastogenesis separately to avoid indirect interference in vivo responses such as inflammation. Taken together, these results show that SIRT6 can directly regulate osteoblast proliferation and differentiation, resulting in attenuation in mineralization. Furthermore, SIRT6 can directly regulate osteoclast differentiation and results in a higher number of small osteoclasts, which may be related to overactive bone resorption.
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Affiliation(s)
- De-Mao Zhang
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Di-Xin Cui
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ruo-Shi Xu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Ya-Chuan Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Li-Wei Zheng
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Peng Liu
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xue-Dong Zhou
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Wang SF, Cai Y, Qin YX, Zhou YC, Su YQ, Wang J. Characterization of yellow grouper Epinephelus awoara (Serranidae) karyotype by chromosome bandings and fluorescence in situ hybridization. J Fish Biol 2012; 80:866-875. [PMID: 22471805 DOI: 10.1111/j.1095-8649.2012.03230.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The cytogenetics of yellow grouper Epinephelus awoara was studied using multiple cytogenetic markers [Giemsa staining, C-banding, Ag-NORs and fluorescence in situ hybridization (FISH)]. Giemsa staining results showed that the karyotypic formula of E. awoara was 2n = 48a, FN (fundamental number) = 48. Faint C-bandings were only detected at the centromeric regions of chromosome pair number 24, being almost indiscernible on the other chromosome pairs. After Ag-NOR staining, one pair of nucleolar organizer regions (NOR) was observed in the subcentromeric region of pair number 24. FISH results showed that 5S rDNA was located at a pair of medium-sized chromosomes, while 18S rDNA appeared at the same location in the subcentromeric region of pair number 24 where Ag-NORs were detected. The telomeric sequence (TTAGGG)(n) detected by FISH was located at both ends of each chromosome. The results suggested that E. awoara has retained general karyotypic structure stability during the evolutionary diversification process.
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Affiliation(s)
- S F Wang
- Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou 570228, China
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Shi YC, Cui YX, Zhou YC, Wei L, Jiang HT, Xia XY, Lu HY, Wang HY, Shang XJ, Zhu WM, Li XJ, Huang YF. A rare Y chromosome constitutional rearrangement: a partial AZFb deletion and duplication within chromosome Yp in an infertile man with severe oligoasthenoteratozoospermia. ACTA ACUST UNITED AC 2012; 34:461-9. [PMID: 21950337 DOI: 10.1111/j.1365-2605.2010.01098.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report a case of an infertile man with severe oligoasthenoteratozoospermia with a partial azoospermia factor b (AZFb) deletion and duplication region within chromosome Yp11.2. The hormonal profile was normal for serum concentrations of follicle-stimulating hormone, luteinizing hormone, testosterone and oestradiol. The patient, who showed a 46,XY karyotype, had an approximate 2.4 Mb inherited duplication region in Yp11.2 and a de novo partial AZFb deletion, which spanned 5.25 Mb including eight protein coding genes and four non-coding transcripts, but did not remove the RBMY gene family. Both proximal and distal breakpoints of the deletion were outside any palindromic region or inverted repeat sequence and intra-chromosomal non-allelic homologous recombination could not have been the deletion mechanism. The partial AZFb deletion in our case diminished sperm production, but did not completely extinguish spermatogenesis. Considering severe oligozoospermia, spermatozoa in the patient's ejaculate were used for intracytoplasmic sperm injection, resulting in two twin pregnancies.
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Affiliation(s)
- Y C Shi
- Department of Reproduction and Genetics, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
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Lu B, Zhou YC. Poisson-Nernst-Planck equations for simulating biomolecular diffusion-reaction processes II: size effects on ionic distributions and diffusion-reaction rates. Biophys J 2011; 100:2475-85. [PMID: 21575582 DOI: 10.1016/j.bpj.2011.03.059] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 03/22/2011] [Accepted: 03/31/2011] [Indexed: 10/18/2022] Open
Abstract
The effects of finite particle size on electrostatics, density profiles, and diffusion have been a long existing topic in the study of ionic solution. The previous size-modified Poisson-Boltzmann and Poisson-Nernst-Planck models are revisited in this article. In contrast to many previous works that can only treat particle species with a single uniform size or two sizes, we generalize the Borukhov model to obtain a size-modified Poisson-Nernst-Planck (SMPNP) model that is able to treat nonuniform particle sizes. The numerical tractability of the model is demonstrated as well. The main contributions of this study are as follows. 1), We show that an (arbitrarily) size-modified PB model is indeed implied by the SMPNP equations under certain boundary/interface conditions, and can be reproduced through numerical solutions of the SMPNP. 2), The size effects in the SMPNP effectively reduce the densities of highly concentrated counterions around the biomolecule. 3), The SMPNP is applied to the diffusion-reaction process for the first time, to our knowledge. In the case of low substrate density near the enzyme reactive site, it is observed that the rate coefficients predicted by SMPNP model are considerably larger than those by the PNP model, suggesting both ions and substrates are subject to finite size effects. 4), An accurate finite element method and a convergent Gummel iteration are developed for the numerical solution of the completely coupled nonlinear system of SMPNP equations.
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Affiliation(s)
- Benzhuo Lu
- State Key Laboratory of Scientific and Engineering Computing, Institute of Computational Mathematics and Scientific/Engineering Computing, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing, China.
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Zhao RQ, Zhou YC, Ni YD, Lu LZ, Tao ZR, Chen WH, Chen J. Effect of daidzein on egg-laying performance in Shaoxing duck breeders during different stages of the egg production cycle. Br Poult Sci 2010; 46:175-81. [PMID: 15957437 DOI: 10.1080/00071660500064808] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The effect of a phyto-oestrogen, daidzein, on the laying performance of Shaoxing female ducks was examined in three experiments performed at different stages of the egg production cycle. Egg-laying rate, egg weight, egg composition, feed conversion ratio, hatchability characteristics of eggs and body weight, ovary and oviduct weight, as well as changes in serum concentrations of T3, T4 and E2 were recorded as response criteria. In the first experiment, 68 young ducks, 100 d of age, were given a basal diet (maize-soybean meal) with or without 3 mg of daidzein/kg diet for 42 d. Daidzein did not affect the onset of lay but apparently decreased egg-laying rate and mean egg weight as well as the feed conversion ratio. In the second experiment, 240 breeding ducks, 402 d of age, were allotted at random to three groups and given the basal diet containing daidzein at 0 (control), 3 (Da1) and 5mg/kg (Da2) for 35d. Egg-laying rate, mean egg weight and feed conversion ratio increased in both Da1 and Da2 groups. However, an adverse effect of daidzein on fertility and hatchability was observed. In the third experiment, 320 breeding ducks, 415 d of age, were fed on the basal diet with or without 5mg of daidzein/kg diet for 63 d. Egg-laying rate increased by 7.7%, average egg weight tended to increase, whereas yolk/albumen ratio decreased. Daidzein-treated ducks had higher body weight and oviduct weight compared with their controls. Elevated plasma T4 and E2 concentrations accompanied these phenotypic changes, but serum T3 was not affected. It is suggested that daidzein exerts divergent effects on the egg-laying performance of Shaoxing ducks under different physiological conditions and this action is dose-dependent. The changes in circulating E2 imply possible participation of endogenous oestrogen in the mechanism of daidzein action.
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Affiliation(s)
- R Q Zhao
- Key Laboratory of Animal Physiology and Biochemistry, Nanjing Agricultural University, Nanjing, PR China.
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Zhou YC, Lu B, Gorfe AA. Continuum electromechanical modeling of protein-membrane interactions. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 82:041923. [PMID: 21230329 DOI: 10.1103/physreve.82.041923] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2010] [Indexed: 05/30/2023]
Abstract
A continuum electromechanical model is proposed to describe the membrane curvature induced by electrostatic interactions in a solvated protein-membrane system. The model couples the macroscopic strain energy of membrane and the electrostatic solvation energy of the system, and equilibrium membrane deformation is obtained by minimizing the electroelastic energy functional with respect to the dielectric interface. The model is illustrated with the systems with increasing geometry complexity and captures the sensitivity of membrane curvature to the permanent and mobile charge distributions.
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Affiliation(s)
- Y C Zhou
- Department of Mathematics, Colorado State University, Fort Collins, Colorado 80523, USA.
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Wang JB, Li K, Zhong XL, Zhou YC, Fang XS, Tang CC, Bando Y. Considerable Enhancement of Field Emission of SnO(2) Nanowires by Post-Annealing Process in Oxygen at High Temperature. Nanoscale Res Lett 2009; 4:1135-1140. [PMID: 20596286 PMCID: PMC2894354 DOI: 10.1007/s11671-009-9367-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2009] [Accepted: 05/28/2009] [Indexed: 05/27/2023]
Abstract
The field emission properties of SnO(2) nanowires fabricated by chemical vapor deposition with metallic catalyst-assistance were investigated. For the as-fabricated SnO(2) nanowires, the turn-on and threshold field were 4.03 and 5.4 V/mum, respectively. Considerable enhancement of field emission of SnO(2) nanowires was obtained by a post-annealing process in oxygen at high temperature. When the SnO(2) nanowires were post-annealed at 1,000 degrees C in oxygen, the turn-on and threshold field were decreased to 3.77 and 4.4 V/mum, respectively, and the current density was increased to 6.58 from 0.3 mA/cm(2) at the same applied electric field of 5.0 V/mum.
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Affiliation(s)
- JB Wang
- Institute of Modern Physics, Xiangtan University, 411105, Xiangtan, Hunan, China
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, 411105, Xiangtan, Hunan, China
| | - K Li
- Institute of Modern Physics, Xiangtan University, 411105, Xiangtan, Hunan, China
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, 411105, Xiangtan, Hunan, China
| | - XL Zhong
- Institute of Modern Physics, Xiangtan University, 411105, Xiangtan, Hunan, China
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, 411105, Xiangtan, Hunan, China
| | - YC Zhou
- Institute of Modern Physics, Xiangtan University, 411105, Xiangtan, Hunan, China
- Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, Xiangtan University, 411105, Xiangtan, Hunan, China
| | - XS Fang
- Nanoscale Materials Center, National Institute for Materials Science, Tsukuba, 3050047, Japan
| | - CC Tang
- Nanoscale Materials Center, National Institute for Materials Science, Tsukuba, 3050047, Japan
| | - Y Bando
- Nanoscale Materials Center, National Institute for Materials Science, Tsukuba, 3050047, Japan
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31
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Qin J, Guo X, Cui GH, Zhou YC, Zhou DR, Tang AF, Yu ZD, Gui YT, Cai ZM. Cluster characterization of mouse embryonic stem cell-derived pluripotent embryoid bodies in four distinct developmental stages. Biologicals 2009; 37:235-44. [PMID: 19339198 DOI: 10.1016/j.biologicals.2009.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2008] [Revised: 03/04/2009] [Accepted: 03/04/2009] [Indexed: 10/20/2022] Open
Abstract
The formation of embryoid bodies (EBs) is the principal step in the differentiation of embryonic stem (ES) cells. In this study, the morphological characteristics and gene expression patterns of EBs related to the sequential stages of embryonic development were well defined in four distinct developmental groups over 112 days of culture: early-stage EBs groups (1-7 days of differentiation), mid-stage EBs groups (9-15 days of differentiation), maturing EBs groups (17-45 days of differentiation) and matured EBs groups (50 days of differentiation). We first determined definite histological location of apoptosis within EBs and the sequential expression of molecular markers representing stem cells (Oct4, SSEA-1, Sox-2 and AKP), germ cells (Fragilis, Dazl, c-kit, StellaR, Mvh and Stra8), ectoderm (Neurod, Nestin and Neurofilament), mesoderm (Gata-1, Flk-1 and Hbb) and endoderm (AFP and Transthyretin). Our results revealed that developing EBs possess either pluripotent stem cell or germ cell states and that three-dimensional aggregates of EBs initiate mES cell differentiation during prolonged culture in vitro. Therefore, we suggest that this EB system to some extent recapitulates the early developmental processes occurring in vivo.
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Affiliation(s)
- J Qin
- Key Laboratory of Male Reproduction & Genetics of Guangdong Province, Peking University, Shenzhen Hospital, Lianhua Road 1120, FuTian District, Shenzhen 518036, PR China
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32
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Zhou YC, Holst M, McCammon JA. A Nonlinear Elasticity Model of Macromolecular Conformational Change Induced by Electrostatic Forces. J Math Anal Appl 2008; 340:135-164. [PMID: 19461946 PMCID: PMC2423821 DOI: 10.1016/j.jmaa.2007.07.084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this paper we propose a nonlinear elasticity model of macromolecular conformational change (deformation) induced by electrostatic forces generated by an implicit solvation model. The Poisson-Boltzmann equation for the electrostatic potential is analyzed in a domain varying with the elastic deformation of molecules, and a new continuous model of the electrostatic forces is developed to ensure solvability of the nonlinear elasticity equations. We derive the estimates of electrostatic forces corresponding to four types of perturbations to an electrostatic potential field, and establish the existance of an equilibrium configuration using a fixed-point argument, under the assumption that the change in the ionic strength and charges due to the additional molecules causing the deformation are sufficiently small. The results are valid for elastic models with arbitrarily complex dielectric interfaces and cavities, and can be generalized to large elastic deformation caused by high ionic strength, large charges, and strong external fields by using continuation methods.
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Affiliation(s)
- Y C Zhou
- Department of Mathematics University of California, San Diego, La Jolla, CA 92093
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33
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Zhou YC, Lu B, Huber GA, Holst MJ, McCammon JA. Continuum simulations of acetylcholine consumption by acetylcholinesterase: a Poisson-Nernst-Planck approach. J Phys Chem B 2007; 112:270-5. [PMID: 18052268 DOI: 10.1021/jp074900e] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Poisson-Nernst-Planck (PNP) equation provides a continuum description of electrostatic-driven diffusion and is used here to model the diffusion and reaction of acetylcholine (ACh) with acetylcholinesterase (AChE) enzymes. This study focuses on the effects of ion and substrate concentrations on the reaction rate and rate coefficient. To this end, the PNP equations are numerically solved with a hybrid finite element and boundary element method at a wide range of ion and substrate concentrations, and the results are compared with the partially coupled Smoluchowski-Poisson-Boltzmann model. The reaction rate is found to depend strongly on the concentrations of both the substrate and ions; this is explained by the competition between the intersubstrate repulsion and the ionic screening effects. The reaction rate coefficient is independent of the substrate concentration only at very high ion concentrations, whereas at low ion concentrations the behavior of the rate depends strongly on the substrate concentration. Moreover, at physiological ion concentrations, variations in substrate concentration significantly affect the transient behavior of the reaction. Our results offer a reliable estimate of reaction rates at various conditions and imply that the concentrations of charged substrates must be coupled with the electrostatic computation to provide a more realistic description of neurotransmission and other electrodiffusion and reaction processes.
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Affiliation(s)
- Y C Zhou
- Department of Mathematics, Center for Theoretical Biological Physics, Howard Hughes Medical Institute, Department of Chemistry and Biochemistry, and Department of Pharmacology, University of California at San Diego, La Jolla, California 92093-0365, USA
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34
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Lu B, Zhou YC, Huber GA, Bond SD, Holst MJ, McCammon JA. Electrodiffusion: a continuum modeling framework for biomolecular systems with realistic spatiotemporal resolution. J Chem Phys 2007; 127:135102. [PMID: 17919055 DOI: 10.1063/1.2775933] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A computational framework is presented for the continuum modeling of cellular biomolecular diffusion influenced by electrostatic driving forces. This framework is developed from a combination of state-of-the-art numerical methods, geometric meshing, and computer visualization tools. In particular, a hybrid of (adaptive) finite element and boundary element methods is adopted to solve the Smoluchowski equation (SE), the Poisson equation (PE), and the Poisson-Nernst-Planck equation (PNPE) in order to describe electrodiffusion processes. The finite element method is used because of its flexibility in modeling irregular geometries and complex boundary conditions. The boundary element method is used due to the convenience of treating the singularities in the source charge distribution and its accurate solution to electrostatic problems on molecular boundaries. Nonsteady-state diffusion can be studied using this framework, with the electric field computed using the densities of charged small molecules and mobile ions in the solvent. A solution for mesh generation for biomolecular systems is supplied, which is an essential component for the finite element and boundary element computations. The uncoupled Smoluchowski equation and Poisson-Boltzmann equation are considered as special cases of the PNPE in the numerical algorithm, and therefore can be solved in this framework as well. Two types of computations are reported in the results: stationary PNPE and time-dependent SE or Nernst-Planck equations solutions. A biological application of the first type is the ionic density distribution around a fragment of DNA determined by the equilibrium PNPE. The stationary PNPE with nonzero flux is also studied for a simple model system, and leads to an observation that the interference on electrostatic field of the substrate charges strongly affects the reaction rate coefficient. The second is a time-dependent diffusion process: the consumption of the neurotransmitter acetylcholine by acetylcholinesterase, determined by the SE and a single uncoupled solution of the Poisson-Boltzmann equation. The electrostatic effects, counterion compensation, spatiotemporal distribution, and diffusion-controlled reaction kinetics are analyzed and different methods are compared.
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Affiliation(s)
- Benzhuo Lu
- Howard Hughes Medical Institute, University of California at San Diego, La Jolla, California 92093-0365, USA.
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35
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Abstract
Implicit solvent models based on the Poisson-Boltzmann (PB) equation are frequently used to describe the interactions of a biomolecule with its dielectric continuum environment. A novel, highly accurate Poisson-Boltzmann solver is developed based on the matched interface and boundary (MIB) method, which rigorously enforces the continuity conditions of both the electrostatic potential and its flux at the molecular surface. The MIB based PB solver attains much better convergence rates as a function of mesh size compared to conventional finite difference and finite element based PB solvers. Consequently, highly accurate electrostatic potentials and solvation energies are obtained at coarse mesh sizes. In the context of biomolecular electrostatic calculations it is demonstrated that the MIB method generates substantially more accurate solutions of the PB equation than other established methods, thus providing a new level of reference values for such models. Initial results also indicate that the MIB method can significantly improve the quality of electrostatic surface potentials of biomolecules that are frequently used in the study of biomolecular interactions based on experimental structures.
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Affiliation(s)
- Y C Zhou
- Department of Mathematics, Michigan State University, East Lansing, MI 48824, USA
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36
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Zhu JG, Lin JJ, Wan HB, Yuan CX, Li M, Zhao FK, Zhou YC, Wu XF, Cai YM. [Studies on the sex difference in proteins between male and female adult worm of Schistosoma japonicum]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 19:107-9. [PMID: 12571999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To explore the sex difference in proteins between male and female adult worm of Schistosoma japonicum. METHODS Two-electrophoresis was used to analyse the difference of protein between the male and female adult worm of S. japonicum (Chinese strain). RESULTS Two-dimensional electrophoresis analysis revealed that at the site of 43 kDa and an isoelectric point (pI) of 5.60-5.90 the male worm exhibited a band carrying a number of spots and dots, being longer and wider than that exhibited by the female worm. The female worm exhibited 7 specific dots. CONCLUSION The sex differences in proteins between male and female adult worms of S. japonicum are significant.
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Affiliation(s)
- J G Zhu
- Shanghai Institute of Animal Parasitology, Chinese Academy of Agricultural Science, Key Laboratory of Animal Parasitology, Ministry of Agriculture of China, Shanghai 200232
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37
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Liu JW, Chai MQ, Du XY, Song JG, Zhou YC. [Purification and characterization of L-amino acid oxidase from Agkistrodon halys pallas venom]. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 34:305-10. [PMID: 12019442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
L-amino acid oxidase (LAO, EC 1.4.3.2) is widely found in snake venoms and is thought to contribute to the toxicity in envenoming. By using of Sephadex G-150, DEAE-Sepharose CL-6B and FPLC Superose 12 chromatography, a protein with L-amino acid oxidase activity was purified and characterized from Agkistrodon haly Pallas venom. Its molecular mass was 57 kD as determined by SDS-PAGE analysis under both reducing and non-reducing conditions, and its pI was about 4.9. The protein catalysed the stereospecific oxidative deamination of L-amino acid substrate. It inhibited the platelet aggregation induced by ADP and collagen dose-dependently, even at low concentrations of 0.2 micromol/L and 0.08 micromol/L, respectively. The LAO had antibacterial effect to E.coli K12D31, and the effective concentration was as low as 0.03 g/L. Furthermore, the LAO showed cytotoxicity in crystal violet assay and apoptosis-inducing activity in the A549 cells. After 24h treatment with 5 mg/L LAO, the typical DNA fragmentation pattern of apoptotic cells was observed by using of agrose gel electrophoresis.
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Affiliation(s)
- J W Liu
- Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, the Chinese Academy of Sciences, Shanghai 200031, China
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38
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Gu LC, Zhang HL, Song SY, Zhou YC, Lin ZJ. Structure of an acidic phospholipase A(2) from the venom of Deinagkistrodon acutus in a new crystal form. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 34:266-72. [PMID: 12019436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The three-dimensional structure of an acidic phospholipase A(2) purified from the venom of Deinagkistrodon acutus (Agkistrodon acutus) was determined in a new crystal form by molecular replacement at 0.28 nm resolution with a crystallographic R factor of 21.9% (R-free=25.7%) and reasonable stereochemistry. Being similar to the previous reported crystal form, a significant conformational adaptation of segment 14-23 at the dimer interface was observed. This segment was related to the "interface recognition site" (IRS). It was found that a positively charged residue at position 34 seems to be a common feature for most of hemolytic PLA(2)s belonging to group II. Structural comparison between the two crystal forms showed that NaCl had significant effects on the crystal packing, thus leading to dramatic changes of the unit cell parameters. In the new crystal form, MPD (2-methyl-2, 4-pentanediol) molecules exist in the hydrophobic channel of the enzyme.
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Affiliation(s)
- L C Gu
- National Laboratory of Biomacromolecules, Institute of Biophysics, the Chinese Academy of Sciences, Beijing 100101, China.
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39
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Jin YM, Lin JJ, Feng XG, Zhang L, Wu XF, Zhou YC, Cai YM. [Cloning and expression of gynecophoral canal protein gene of Schistosoma japonicum (Chinese strain)]. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 34:311-7. [PMID: 12019443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
A 1949 bp cDNA fragment was amplified by RT-PCR from adult Schistosoma japonicum (Chinese strain) mRNA with 3 pair of primers that were designed according to published SmGCP gene encoding gynecophoral canal protein of Schistosoma mansoni and SjGCP1 gene encoding the conservative region of gynecophoral canal protein of Schistosoma japonicum. Sequence analysis indicated that this fragment, named SjGCP, with 85% identity to SmGCP, contained a complete open reading frame (ORF) of gynecophoral canal protein gene of Schistosoma japonicum (Chinese strain). The amino acid sequence shared 83.7% identity with gynecophoral canal protein of Schistosoma mansoni. This fragment was cloned into the expression vector pET28c(+) and subsequently expressed in Escherichia coli. SDS-PAGE revealed that the molecular weight of this expressed product was 80 kD. Western blotting showed that the recombinant protein reacted well with the rabbit serum immunized with Sj worm antigen, indicating that this expressed product had good antigenicity.
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Affiliation(s)
- Y M Jin
- Shanghai Institute of Animal Parasitology, Chinese Academy of Agricultural Science, Key Laboratory of Animal Parasitology, Ministry of Agriculture of China, Shanghai 200232, China
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40
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Jiao HM, Jin Q, Zhao JJ, Feng B, Wu XF, Zhou YC. [The hemolytic site of the basic phospholipase A(2) from Agkistrodon halys pallas]. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 34:383-7. [PMID: 12019457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The gene of the basic phospholipase A(2) from Agkistrodon halys Pallas (BPLA(2) )was mutated site-directedly by polymerase chain reaction (PCR) and the residue Arg(34) of the encloding protein was substituted by Glu and Gln respectively. The mutant gene has been cloned into the expression vector pBLMVL2 and has been expressed in E.coli RR1 effectively. The protein was produced as insoluble inclusion bodies. After partial purification, the inclusion bodies were denatured and renatured into active form, and the renatured recombinant protein was purified by gel-filtration. The expression product has the same enzymatic activity as the denatured-refolded BPLA(2) and its hemolytic activity dropped distinctly, which suggest that the basic residue Arg(34) of BPLA(2) is a crucial amino acid residue during the process of hemolysis.
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Affiliation(s)
- H M Jiao
- Institute of Biochemistry and Cell Biology, the Chinese Academy of Sciences, Shanghai 200031, China
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41
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Zhou YC, Zhang XQ, Wang XP, Wu LR, Zhou WJ, Zhang WJ, Jing JK. [Chromosomal location and molecular marker of resistance gene to Puccinia striiformis west. in Leymus mollis Trin. Hara]. Yi Chuan Xue Bao 2001; 28:864-9. [PMID: 11582747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
The hybrid wheat line, 93784 is a stable line selected from progenies of Leymus molli Trin. Hara x common wheat, which shows a very high level of resistance to yellow rust. The results of GISH using genomic DNA of Leymus mollis as probe indicated that the 93784 was a wheat-Leymus mollis small segment translocation line, and the translocated alien chromosome fragment were located on a pair of short arm terminals of what chromosomes. Using this translocation line, we established F2 segregation population and identified its yellow rust resistance in adult stage. Genetic analysis suggested that the yellow rust resistance of 93784 was controlled by a single gene. The gene was located on the translocated chromosome segments of Leymus mollis. We called it YrLm. By AFLP analysis with Taq I (T1-T4)/Pst I (P1-P6) primes in individuals of F2 segregation population and their susceptive and resistant parents, we screened a molecular marker that linked to yellow rust resistance gene YrLm. We also cloned and sequenced the molecular marker. The length of the marker is 205 bp, named P1T(3)205.
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Affiliation(s)
- Y C Zhou
- State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China
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42
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Abstract
Central interleukin-1 (IL-1) plays an important role in mediating the neural, endocrine, and behavioral responses to stressors. Here we tested whether central IL-1 is involved in stress-induced hypertension or footshock (FS)-induced-analgesia. We observed that: (1) intracerebral ventricular injection of (ICV) IL-1beta induced pressor responses; (2) hypertension induced by IL-1beta was blocked by ICV an IL-1 antagonist, IL-1ra; (3) ICV IL-1ra attenuated the pressor response induced by FS but intravenous injection of IL-1ra did not significantly reduce this response; (4) the hypertensive response to conditioned fear stimuli was reversed by ICV IL-1ra; (5) FS-induced-analgesia was attenuated by ICV IL-1ra and this effect disappeared 15 min after ICV IL-1ra. These results suggest that both the pressor response to FS or conditioned fear stimuli and short lasting analgesia induced by FS are mediated by central IL-1.
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Affiliation(s)
- C J Zou
- Department of Physiology and Pathophysiology, Health Science Center, Peking University, 100083, People's Republic of, Beijing, China.
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43
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Zhou YC, Xu BH, Yu AB, Zulli P. Numerical investigation of the angle of repose of monosized spheres. Phys Rev E Stat Nonlin Soft Matter Phys 2001; 64:021301. [PMID: 11497572 DOI: 10.1103/physreve.64.021301] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2000] [Revised: 04/05/2001] [Indexed: 05/23/2023]
Abstract
This paper presents a numerical study of the angle of repose, a most important macroscopic parameter in characterizing granular materials, by means of a modified distinct element method. Emphasis is given to the effect of variables related to factors such as particle characteristics, material properties, and geometrical constraints. The results show that sliding and rolling frictions are the primary reasons for the formation of a sandpile; particle size and container thickness significantly influence the angle of repose; and the angle of repose is not so sensitive to density, Poisson's ratio, damping coefficient, and Young's modulus. Increasing rolling friction coefficient or sliding friction coefficient increases the angle of repose. Conversely, increasing particle size or container thickness decreases the angle of repose. The underlying mechanisms for these effects are discussed in terms of particle-particle and particle-wall interactions.
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Affiliation(s)
- Y C Zhou
- Centre for Computer Simulation and Modelling of Particulate Systems, School of Materials Science and Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
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Abstract
To perceive red and far-red light, plants have evolved specific photoreceptors called phytochromes. Even though the spectral properties of all phytochromes are very similar, they show a distinct mode of action. Here we describe EID1, a negatively acting component of the signaling cascade that shifts the responsiveness of the phytochrome A (phyA) signaling system associated with hypocotyl elongation from red to far-red wavelengths. EID1 is a novel nuclear F-box protein that contains a leucine zipper whose integrity is necessary for its biological function. EID1 most probably acts by targeting activated components of the phyA signaling pathway to ubiquitin-dependent proteolysis.
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Affiliation(s)
- M Dieterle
- Universität Freiburg, Institut für Biologie 2/Botanik, D-79104 Freiburg, Germany
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45
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Padow M, Lai L, Fisher RJ, Zhou YC, Wu X, Kappes JC, Towler EM. Analysis of human immunodeficiency virus type 1 containing HERV-K protease. AIDS Res Hum Retroviruses 2000; 16:1973-80. [PMID: 11153080 DOI: 10.1089/088922200750054701] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The human endogenous retrovirus, type K (HERV-K) represents the most biologically active form of known retroelements present in the human genome. Several HERV-K genomes have transcriptionally active open reading frames and encode their own protease (PR). The HERV-K PR has been shown to authentically cleave human immunodeficiency virus type 1 (HIV-1) matrix-capsid peptide in the presence of HIV-1 PR inhibitors. This raised the possibility that HERV-K PR could complement HIV-1 PR function in HIV-1-infected individuals. To investigate this possibility, we fused the HIV-1 vpr gene to the HERV-K PR gene (vpr-PR). The vpr-PR expression plasmid and a PR-defective HIV-1 clone were cotransfected into 293T cells. Progeny virions were assayed for processing of the HIV-1 polyproteins by Western blot and for changes in infectivity. HERV-K PR fused to Vpr was incorporated into HIV-1 virions at a high concentration and cleaved the Gag and Pol precursor proteins. However, neither Gag nor Pol polyproteins were correctly processed. Moreover, the HERV-K PR did not restore virus infectivity. While these results do not exclude the possibility that the HERV-K PR could complement an HIV-1 PR whose function is impaired due to drugs or drug-resistant mutations, they clearly demonstrate that the HERV-K PR cannot substitute for the function of the wild-type HIV-1 PR.
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Affiliation(s)
- M Padow
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama 35294, USA
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46
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Liu JW, Du XY, Liu P, Chen X, Xu JM, Wu XF, Zhou YC. Purification, characterization, and cDNA sequence of halysetin, a disintegrin-like/cysteine-rich protein from the venom of Agkistrodon halys Pallas. Biochem Biophys Res Commun 2000; 278:112-8. [PMID: 11185525 DOI: 10.1006/bbrc.2000.3724] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
By means of DEAE-Sepharose CL-6B column chromatography, gel filtration on Sephadex G-75 and Superose 12 FPLC, halysetin, an antiplatelet protein, was purified from the venom of Agkistrodon halys Pallas with molecular mass of 29 kDa on SDS-PAGE and 23,168 Da by mass spectrometry. The p1 was about 5.0. Halysetin was devoid of phospholipase A2, fibrino-(geno)lytic, esterase, hemorrhagenic activities. Halysetin dose-dependently inhibited the aggregation of human platelet, which was stimulated by collagen with IC50 of 420 nM, but not that stimulated by ADP. The N-and C-terminal sequences of halysetin were characterized. Its full-length cDNA was cloned by RT-PCR from the total RNA extracted from the snake venom gland. It encoded a protein of 212-amino-acid residues with disintegrin-like/cysteine-rich domains and was highly homologous with SYMPs (snake venom metalloprotease).
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Affiliation(s)
- J W Liu
- Institute of Biochemistry, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences
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47
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Abstract
We have developed a complete system for discovery of lead compounds as inhibitors of creatine kinase B. In this article, we describe production and purification of the recombinant protein, conditions and features of an optimized high-throughput screening assay, and results of our implementation of the system using a diverse compound library.
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Affiliation(s)
- E M Towler
- SAIC Frederick, NCI-FCRDC, Frederick, Maryland, 21702, USA.
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48
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Tang L, Zhou YC, Lin ZJ. Structure of agkistrodotoxin in an orthorhombic crystal form with six molecules per asymmetric unit. Acta Crystallogr D Biol Crystallogr 1999; 55:1986-96. [PMID: 10666574 DOI: 10.1107/s0907444999012603] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The structure of agkistrodotoxin crystallized under basic conditions has been determined at 2.8 A resolution by the molecular-replacement technique and refined to a crystallographic R factor of 0.194 and a free R factor of 0.260 with good stereochemistry. The molecular packing in the crystal differs from other PLA(2)s. The six molecules in the asymmetric unit form three dimers linked by Ca(2+) ions in a near-perfect six-ligand octahedral coordinating system. Extensive intermolecular hydrophobic interactions occur at the interfacial recognition site of each neurotoxin molecule, which provides an insight into phospholipase A(2)-membrane interactions. This hydrophobic interaction-induced molecular association along the interfacial recognition site suggests a self-protection mechanism of agkistrodotoxin.
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Affiliation(s)
- L Tang
- National Laboratory of Biological Macromolecules, Institute of Biophysics, Academia Sinica, Beijing 100101, People's Republic of China
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Zhou YC, Waxman DJ. STAT5b down-regulates peroxisome proliferator-activated receptor alpha transcription by inhibition of ligand-independent activation function region-1 trans-activation domain. J Biol Chem 1999; 274:29874-82. [PMID: 10514468 DOI: 10.1074/jbc.274.42.29874] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Growth hormone-activated STAT5b inhibits by up to 80% the transcriptional activity of peroxisome proliferator-activated receptor (PPAR) alpha, a nuclear receptor activated by diverse environmental chemicals and hypolipidemic drugs classified as peroxisome proliferators. This inhibitory cross-talk between STAT5b and PPAR is now reported for PPAR forms gamma and delta and for thyroid hormone receptor, indicating a more general potential for inhibitory cross-talk between JAK/STAT and nuclear receptor signaling pathways. Further investigations revealed that SOCS-3, a growth hormone-inducible negative regulator of cytokine signaling to STAT5b, abolished the STAT5b inhibitory response. A constitutively active STAT5b mutant failed to inhibit PPARalpha activity, indicating that STAT5b does not induce synthesis of a more proximal PPARalpha inhibitor. STAT5b inhibition was not reversed by overexpression of the heterodimerization partner of PPAR (retinoid X receptor) or the nuclear receptor coactivators P300 and SRC-1, suggesting that STAT5b does not inhibit PPARalpha by competing for these limiting cellular cofactors. STAT5b did not inhibit a chimeric receptor comprised of yeast GAL4 DNA-binding domain linked to the ligand binding/AF-2 trans-activation domain of PPARalpha, indicating that the COOH-terminal AF-2 domain of PPAR is not the target of STAT5b inhibition. Rather, STAT5b inhibited transcription driven by the NH(2)-terminal ligand-independent AF-1 trans-activation domain of PPARalpha in a GAL4-linked chimera by approximately 80%. The conservation of this AF-1 trans-activation function in many nuclear receptors suggests that AF-1 may serve as an important target for inhibitory cross-talk between STAT transcription factors and nuclear receptors in a variety of signaling pathways.
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Affiliation(s)
- Y C Zhou
- Division of Cell Biology, Department of Biology, Boston University, Boston, Massachusetts 02215, USA
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Abstract
Based on the high conservation in the 5' and 3' untranslated regions of NGF cDNAs, oligonucleotides complementary to all these known sequences were synthesized. By RT-PCR, we successfully isolated the complementary DNA encoding NGF precursor from the Agkistrodon halys Pallas (a Chinese snake strain). The nucleotide sequence which presents 90.5%, 88.6% and 63.4% homology to that of Krait Bungarus multicinctus, cobra and human NGF respectively, encoded a prepro-NGF molecule with 241 amino acids and a mature NGF molecule with 119 amino acids. The NGF cDNA inserts were subcloned into pCDNA3 expression vector and then transfected into COS-7 cells. The supernatant of the transfected cells turned out NGF biological activity as assayed by the survival rate of PC12 pheochromocytoma cells.
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Affiliation(s)
- L Y Guo
- Shanghai Institute of Biochemistry, Academic Sinica, People's Republic of China
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