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Xu H, Zhang Y, Wu M, Gong T, Hu Y, Zhou H. Efficient degradation of sulfonamides by introducing sulfur to magnetic Prussian blue analog in photo-assisted persulfate oxidation system. Chemosphere 2024; 357:141938. [PMID: 38631498 DOI: 10.1016/j.chemosphere.2024.141938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/20/2024] [Accepted: 04/05/2024] [Indexed: 04/19/2024]
Abstract
The peroxynitrite photocatalytic degradation system was considered a green, convenient, and efficient water treatment process, but not satisfying against some antibiotics, e.g. sulfonamides (SAs). To improve the photocatalytic degradation efficiency of SAs, sulfur was introduced to a magnetic Fe-MOF (Fe-metal organic framework) Prussian blue analog to achieve a heteroatomic material CuFeO@S, which was applied in heterogeneous visible light photo-assisted catalytic process with persulfate (PS) as an oxidant. The characterization results of CuFeO@S by XRD and XPS confirmed the presence of Fe3O4 (for magnetic separation), Cu+ (for activation of PS) and S2- (for narrowing the energy band and prolonging the lifetime of photo-generated electronics). Through systematic optimization of reaction conditions in CuFeO@S + PS + hv system, efficient degradation of four tested SAs was achieved in 30 min (removal rate of 97-100% for the tested 4 SAs). Moreover, the material could be magnetically recycled and reused for over 7 cycles with a removal rate of >90% for sulfamerazine. Furthermore, the removal rate of sulfamerazine in pond water reached 99% at a mineralization rate of about 34% (decrease in total organic matter), demonstrating its potential in the treatment of antibiotic-containing wastewater.
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Affiliation(s)
- Hao Xu
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, 124221, China
| | - Yiwen Zhang
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, 124221, China
| | - Minghuo Wu
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, 124221, China.
| | - Tingyue Gong
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, 124221, China
| | - Yufeng Hu
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, 124221, China
| | - Hao Zhou
- School of Ocean Science and Technology, Dalian University of Technology, Panjin, 124221, China.
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Lin H, Luo Y, Gong T, Fang H, Li H, Ye G, Zhang Y, Zhong M. GDF15 induces chemoresistance to oxaliplatin by forming a reciprocal feedback loop with Nrf2 to maintain redox homeostasis in colorectal cancer. Cell Oncol (Dordr) 2024:10.1007/s13402-024-00918-w. [PMID: 38386232 DOI: 10.1007/s13402-024-00918-w] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2024] [Indexed: 02/23/2024] Open
Abstract
PURPOSE Growth differentiating Factor 15 (GDF15) is linked to several cancers, but its effect on chemoresistance in colorectal cancer (CRC) remains unclear. Here, we investigated the role of GDF15 in the chemotherapeutic response of CRC patients to oxaliplatin (L-OHP). METHODS GDF15 levels in serum and tumour tissues were detected in CRC patients have received L-OHP-based neoadjuvant chemotherapy. The effects of GDF15 neutralization or GDF15 knockdown on cell proliferation, apoptosis and intracellular reactive oxygen species (ROS) levels were analysed in vitro and in vivo. Co-immunoprecipitation (Co-IP), Chromatin Immunoprecipitation (ChIP) and luciferase reporter assays were used to explore the interaction between GDF15 and Nrf2. RESULTS In this study, we found that GDF15 alleviates oxidative stress to induce chemoresistance of L-OHP in CRC. Mechanically, GDF15 posttranscriptionally regulates protein stability of Nrf2 through the canonical PI3K/AKT/GSK3β signaling pathway, and in turn, Nrf2 acts as a transcription factor to regulate GDF15 expression to form a positive feedback loop, resulting in the maintenance of redox homeostasis balance in CRC. Furthermore, a positive correlation between GDF15 and Nrf2 was observed in clinical CRC samples, and simultaneous overexpression of both GDF15 and Nrf2 was associated with poor prognosis in CRC patients treated with L-OHP. Simultaneous inhibition of both GDF15 and Nrf2 significantly increases the response to L-OHP in an L-OHP-resistant colorectal cancer cells-derived mouse xenograft model. CONCLUSION This study identified a novel GDF15-Nrf2 positive feedback loop that drives L-OHP resistance and suggested that the GDF15-Nrf2 axis is a potential therapeutic target for the treatment of L-OHP-resistant CRC.
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Affiliation(s)
- Haiping Lin
- Department of Gastrointestinal Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yang Luo
- Department of Gastrointestinal Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Tingyue Gong
- Department of Gastrointestinal Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hongsheng Fang
- Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Hao Li
- Department of Gastrointestinal Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Guangyao Ye
- Department of Gastrointestinal Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yan Zhang
- Med-X Research Institute, School of Biomedical Engineering, Shanghai Jiaotong University, Shanghai, China.
| | - Ming Zhong
- Department of Gastrointestinal Surgery, Renji Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
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Li LJ, Hu CM, Gong T, Zhang LF, Li XW, Xiao XW, Cui YQ. [Factors associated with malnutrition in infants with congenital heart disease within one year after surgery]. Zhonghua Er Ke Za Zhi 2023; 61:440-445. [PMID: 37096264 DOI: 10.3760/cma.j.cn112140-20220909-00794] [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: 04/26/2023]
Abstract
Objective: To explore the risk factors of malnutrition in infants with congenital heart disease within one year after surgery. Methods: This retrospective cohort study selected 502 infants with congenital heart disease who underwent surgical treatment in Guangzhou Women and Children's Medical Center from February 2018 to January 2019. Their basic information and clinical data were analyzed, and their nutrition status after the surgery was followed up by questionnaire survey. Weight-for-age Z score (WAZ)≤-2 one year after operation was defined as malnutrition group, and WAZ>-2 was non-malnutrition group. The perioperative indicators and complementary food advancement were compared between the two groups by chi-square test, t-test, and Kruskal-Wallis test. The risk factors of malnutrition were analyzed by Logistic regression. Results: A total of 502 infants were selected, including 301 males and 201 females, with the age of 4.1 (2.0, 6.8) months. There were 90 cases in malnutrition group and 412 cases in non-malnutrition group. The body length and weight at birth in the malnutrition group were lower than those in the non-malnutrition group ((47.8±3.8) vs. (49.3±2.5) cm, (2.7±0.6) vs.(3.0±0.5) kg, both P<0.001). The proportion of paternal high school education or above and the proportion of family per capita income of 5 000 yuan or above in the malnutrition group were lower than those in the non-malnutrition group ((18.9% (17/90) vs. 30.8% (127/412), 18.9% (17/90) vs. 33.7% (139/412), both P<0.05). Compared to the non-malnutrition group, the proportion of complex congenital heart disease in the malnutrition group was higher (62.2% (56/90) vs. 47.3% (195/412), P<0.05). The postoperative mechanical ventilation time, postoperative intensive care unit (ICU) stay time, postoperative hospital stay, total length of ICU stay and total hospital stay in the malnutrition group were significantly longer than those in non-malnutrition group (all P<0.05). The proportion of egg and fish supplementation over 2 times/week within one year after the surgery was also lower in the malnutrition group (both P<0.05). Logistic regression analysis showed that mother's weight at delivery (OR=0.95,95%CI 0.91-0.99), the pre-operative WAZ≤-2 (OR=6.04, 95%CI 3.13-11.65), the complexity of the cardiac disease (OR=2.23, 95%CI 1.22-4.06), the hospital stay after the surgery over 14 days (OR=2.61, 95%CI 1.30-5.26), the types of complementary food<4 (OR=2.57, 95%CI 1.39-4.76), and the frequency of meat and fish<2 times/week (OR=2.11, 95%CI 1.13-3.93) were the risk factors associated with malnutrition within one year after the surgery. Conclusion: Mother's weight at delivery pre-operative nutritional status, complexity of cardiac disease, postoperative hospital stay, types of daily supplements and frequency of fish are risk factors associated with malnutrition within one year after surgery in children with congenital heart disease.
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Affiliation(s)
- L J Li
- Department of Cardiac Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - C M Hu
- Department of Cardiac Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - T Gong
- Department of Cardiac Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - L F Zhang
- Department of Cardiac Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - X W Li
- Department of Cardiac Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - X W Xiao
- Department of Cardiac Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - Y Q Cui
- Department of Cardiac Intensive Care Unit, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
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Lin H, Yu M, Ye G, Qin S, Fang H, Jing R, Gong T, Luo Y, Zhong M. Intracorporeal reinforcement with barbed suture is associated with low anastomotic leakage rates after laparoscopic low anterior resection for rectal cancer: a retrospective study. BMC Surg 2022; 22:335. [PMID: 36085058 PMCID: PMC9461121 DOI: 10.1186/s12893-022-01782-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
Background Anastomotic leakage (AL) is one of most severe postoperative complications following low anterior resection (LAR) for rectal cancer, and has an adverse impact on postoperative recovery. The occurence of AL is associated with several factors, while few studies explored the role of intracorporeal barbed suture reinforcement in it. Methods Consecutive cases underwent laparoscopic LAR for rectal cancer from Mar. 2018 to Feb. 2021 in our center were retrospectively collected. Cases were classified into the intracorporeal barbed suture reinforcement group and the control group according to whether performing intracorporeal reinforcement with barbed suture, and AL incidences were compared between two groups. Propensity score matching (PSM) was then performed based on identified risk factors to reduce biases from covariates between two groups. AL incidences in the matched cohort were compared. Results A total of 292 cases entered into the study, and AL incidences were significantly lower in the intracorporeal barbed suture reinforcement group compared with the control group (10.00% vs 2.82%, P = 0.024). Sex, BMI, preoperative adjuvant chemoradiotherapy and anastomotic level were chose for PSM analyses based on previous studies. In the matched cohort, the AL incidences were still significantly lower in the intracorporeal barbed suture reinforcement group (10.57% vs 2.44%, SD = 0.334). Conclusions Intracorporeal barbed suture reinforcement is associated with low AL incidences after laparoscopic LAR for rectal cancer, which is a potential procedure for reducing AL and worthy of application clinically.
Supplementary Information The online version contains supplementary material available at 10.1186/s12893-022-01782-x.
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Gong T, Lu T, Mi JX, Fang R, Shan C. [Research progress on the mechanisms of cryotherapy and its application in laryngopharyngeal diseases]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:1023-1027. [PMID: 36058675 DOI: 10.3760/cma.j.cn115330-20211221-00811] [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: 06/15/2023]
Affiliation(s)
- T Gong
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - T Lu
- Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - J X Mi
- Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - R Fang
- the Department of Otolaryngology-Head and Neck Surgery, Eye, Ear, Nose, and Throat Hospital of Fudan University, Shanghai 200031, China
| | - Chunlei Shan
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China Center of Rehabilitation Medicine, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China Engineering Research Center of Traditional Chinese Medicine Intelligent Rehabilitation, Ministry of Education, Shanghai 201203, China
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Chen HS, Yang Y, Ni J, Chen GF, Ji Y, Yi F, Zhang ZB, Wu J, Cai XL, Shao B, Wang JF, Liu YF, Geng DQ, Qu XH, Li XH, Wei Y, Han SG, Zhu RX, Ding JP, Lyu H, Huang YN, Huang YH, Xiao B, Gong T, Yu XF, Cui LY. [Effects of cinepazide maleate injection on blood pressure in patients with acute ischemic stroke and hypertension]. Zhonghua Nei Ke Za Zhi 2022; 61:916-920. [PMID: 35922216 DOI: 10.3760/cma.j.cn112138-20210822-00574] [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 blood pressure change in patients with acute ischemic stroke (AIS) and hypertension treated with cinepazide maleate injection. Methods: This was a subgroup analysis of post-marketing clinical confirmation study of cinepazide maleate injection for acute ischemic stroke: a randomized, double-blinded, multicenter, placebo-parallel controlled trial, which conducted in China from August 2016 to February 2019. Eligible patients fulfilled the inclusive criteria of acute anterior circulation ischemic stroke with National Institutes of Health Stroke Scale (NIHSS) scores of 7-25. The primary endpoints were mean blood pressure of AIS patients treated with cinepazide maleate or control, which were assessed during the treatment period (14 days), and the proportion of the patients with normal blood pressure was analyzed after the treatment period. Furthermore, a subgroup analysis was performed to investigate a possible effect of the history of hypertension on outcomes. Results: This analysis included 809 patients with hypertension. There was no significant difference in patients blood pressure and the proportion of patients with normal blood pressure (60.5% vs. 59.0%,P>0.05) between cinepazide maleate group and control group. Conclusion: Administration of cinepazide maleate injection does not affect the management of clinical blood pressure in patients with AIS.
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Affiliation(s)
- H S Chen
- Department of Neurology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Y Yang
- Department of Neurology, the First Bethune Hospital of Jilin University, Changchun 130021, China
| | - J Ni
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - G F Chen
- Department of Neurology, Xuzhou Central Hospital, Xuzhou 221009, China
| | - Y Ji
- Department of Neurology, Tianjin Huanhu Hospital, Tianjin 300350, China
| | - F Yi
- Department of Neurology, JiangXi PingXiang People's Hospital, Pingxiang 337055, China
| | - Z B Zhang
- Department of Neurology, the Fourth Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - J Wu
- Department of Neurology, the Second Affiliated Hospital of Nanjing Medical University, Nanjing 210011, China
| | - X L Cai
- Department of Neurology, Lishui Municipal Central Hospital, Lishui 323000, China
| | - B Shao
- Department of Neurology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, China
| | - J F Wang
- Department of Neurology, Dalian Municipal Central Hospital, Dalian 116033, China
| | - Y F Liu
- Department of Neurology, Huangshi Central Hospital, Huangshi 435000, China
| | - D Q Geng
- Department of Neurology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - X H Qu
- Department of Neurology, Jiangxi Provincial People's Hospital, Nanchang 330006, China
| | - X H Li
- Department of Neurology, Jinan Central Hospital, Jinan 250013, China
| | - Y Wei
- Department of Neurology, Hengshui People's Hospital (Harrison International Peace Hospital), Hengshui 053000, China
| | - S G Han
- Department of Neurology, Meihekou City Central Hospital, Meihekou 135014, China
| | - R X Zhu
- Department of Neurology, Inner Mongolia People's Hospital, Hohhot 010017, China
| | - J P Ding
- Department of Neurology, Xuanwu Hospital Capital Medical University, Beijing 100053, China
| | - H Lyu
- Department of Neurology, Shaanxi Provincial People's Hospital, Xi'an 710068, China
| | - Y N Huang
- Department of Neurology, Peking University First Hospital, Beijing 100034, China
| | - Y H Huang
- Department of Neurology, the Seventh Medical Center of the Chinese PLA General Hospital, Beijing 100700, China
| | - B Xiao
- Department of Neurology, Xiangya Hospital Central South University, Changsha 410008, China
| | - T Gong
- Department of Neurology, Beijing Hospital, Beijing 100730, China
| | - X F Yu
- Department of Neurology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - L Y Cui
- Department of Neurology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
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Geng SL, Gong T, Ji C, Su HH. Oral tofacitinib for successful treatment of refractory alopecia areata in preschool children. J Eur Acad Dermatol Venereol 2022; 36:e1055-e1057. [PMID: 35876014 DOI: 10.1111/jdv.18447] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S L Geng
- Department of Dermatology, Institute of Dermatology and Venereology, Fujian Dermatology and Venereology Research Institute, Key Laboratory of Skin Cancer of Fujian Higher Education Institutions, the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China
| | - T Gong
- Central Laboratory, the First Affiliated Hospital of Fujian Medical University, Fuzhou, 350005, China
| | - C Ji
- Department of Dermatology, Institute of Dermatology and Venereology, Fujian Dermatology and Venereology Research Institute, Key Laboratory of Skin Cancer of Fujian Higher Education Institutions, the First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China
| | - H H Su
- Department of Dermatology, Tianjin Children's Hospital, Tianjin, 300074, China
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Liu J, Gong T, Xu X, Fox KM, Oates M, Gandra SR. Heavy clinical and economic burden of osteoporotic fracture among elderly female Medicare beneficiaries. Osteoporos Int 2022; 33:413-423. [PMID: 34505178 DOI: 10.1007/s00198-021-06084-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 07/25/2021] [Indexed: 10/20/2022]
Abstract
UNLABELLED We comprehensively described elderly Medicare women with an outpatient visit in 2011 and fracture within 2 years before. These women were at very high risk for subsequent fracture and high healthcare utilization and cost, especially those with vertebral or multiple fractures. However, rates of fracture prevention treatments were low. INTRODUCTION Postmenopausal women with osteoporosis are stratified to high and very-high fracture risk categories, and this categorization drives algorithms for osteoporosis management in osteoporosis treatment guidelines. This study comprehensively describes a very-high-risk cohort. METHODS This retrospective cohort study used the Medicare 20% database; elderly women with an outpatient visit in 2011 and fracture within 2 years before the visit were included. Outcomes included fracture risk, all-cause and fracture-related healthcare resource utilization and cost, and osteoporosis medication use in the 5 years after the visit. RESULTS Overall, 43,193 patients were included. The 5-year probability was 0.36 for major fracture and 0.11 and 0.17 for hip fracture and vertebral fracture, respectively, much higher than the guidelines' 10-year probability thresholds for very-high-risk (0.3 for major fracture, 0.045 for hip fracture). Rates of hospitalizations, emergency department visits or observation stays, and skilled nursing facility stays in year 1 were 53.7, 57.0, and 18.8 per 100 patient-years, respectively, decreasing slightly in subsequent years. Mean healthcare cost was $23,700 in year 1, decreasing to $18,500 in year 5. About 29.1% of patients received osteoporosis medications in year 1, decreasing to 16.9% by year 5. Rates for all outcomes, especially fractures, were much higher among vertebral and multiple fracture cohorts. CONCLUSION Elderly women with a fracture within last 2 years were at very-high-risk for subsequent fracture and high healthcare utilization and cost, especially those with vertebral or multiple fractures. However, rates of fracture prevention treatments were low. More effort is needed to identify and treat patients at very-high-risk for fracture.
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Affiliation(s)
- J Liu
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, 701 Park Avenue, Suite S2.100, Minneapolis, MN, 55415, USA.
| | - T Gong
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, 701 Park Avenue, Suite S2.100, Minneapolis, MN, 55415, USA
| | - X Xu
- Amgen Inc., Thousand Oaks, CA, USA
| | - K M Fox
- Strategic Healthcare Solutions, LLC., Aiken, SC, USA
| | - M Oates
- Amgen Inc., Thousand Oaks, CA, USA
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Liu W, Liu J, Mi L, Cai C, Gong T, Ma J, Wang L. BURDEN OF MULTIPLE MYELOMA IN CHINA: AN ANALYSIS OF THE GLOBAL BURDEN OF DISEASE, INJURIES, AND RISK FACTORS STUDY 2019. Hematol Oncol 2021. [DOI: 10.1002/hon.107_2881] [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: 11/06/2022]
Affiliation(s)
- W. Liu
- Peking University Cancer Hospital & Institute Department of Lymphoma Beijing China
| | - J. Liu
- National Center for Chronic and Noncommunicable Disease Control and Prevention Chinese Center for Disease Control and Prevention National Center for Chronic and Noncommunicable Disease Control and Prevention Beijing China
| | - L. Mi
- Peking University Cancer Hospital & Institute Department of Lymphoma Beijing China
| | - C. Cai
- Beijing Institute of Survey and Mapping Beijing Municipal Key Laboratory of Urban Spatial Information Engineering Beijing Institute of Survey and Mapping Beijing China
| | - T. Gong
- Harbin Institute of Hematology & Oncology Harbin Institute of Hematology & Oncology Harbin China
| | - J. Ma
- Harbin Institute of Hematology & Oncology Harbin Institute of Hematology & Oncology Harbin China
| | - L. Wang
- National Center for Chronic and Noncommunicable Disease Control and Prevention Chinese Center for Disease Control and Prevention National Center for Chronic and Noncommunicable Disease Control and Prevention Beijing China
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Kopecky K, Mathew C, Gong T, Enter D, Shalabi M, Blough B, Alam A, Hall S. Drugs, Bugs, and the ECMO Unplugged: A Case of a 61-year-old with Cardiogenic Shock and Utility of Palliative Bedside ECMO De-Escalation. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Milligan G, Patel N, Gong T, Mathew C, Tejani I, Hall S, Banerjee S, Minniefield N, Jermyn R, Michelis K, Cheeran D, Alam A. Procedural Safety Profile of Cardiomems Heart Failure Sensor Implantation in a Veterans Association Patient Population. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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Dib E, Joseph S, Patel N, Rafael A, Meyer D, Bindra A, Hall S, Gong T. Left Ventricular Assist Device Implantation in a COVID-19 Positive Patient. J Heart Lung Transplant 2021. [PMCID: PMC7979386 DOI: 10.1016/j.healun.2021.01.1300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Introduction Case Report Summary
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Chen J, Zhang A, Xiang Z, Lu M, Huang P, Gong T, Pan Y, Lin Y, Zhou X, Li Y. EpsR Negatively Regulates Streptococcus mutans Exopolysaccharide Synthesis. J Dent Res 2021; 100:968-976. [PMID: 33749354 DOI: 10.1177/00220345211000668] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Streptococcus mutans is considered the primary etiological agent of human dental caries. Glucosyltransferases (Gtfs) from S. mutans play important roles in the formation of biofilm matrix and the development of cariogenic oral biofilm. Therefore, Gtfs are considered an important target to prevent the development of dental caries. However, the role of transcription factors in regulating gtf expression is not yet clear. Here, we identify a MarR (multiple antibiotic resistance regulator) family transcription factor named EpsR (exopolysaccharide synthesis regulator), which negatively regulates gtfB expression and exopolysaccharide (EPS) production in S. mutans. The epsR in-frame deletion strain grew slowly, aggregated more easily in the presence of dextran, and displayed different colony morphology and biofilm structure. Notably, epsR deletion resulted in altered 3-dimensional biofilm architecture, increased water-insoluble EPS production, and upregulated GtfB protein content and activity. In addition, global gene expression profiling revealed differences in the expression levels of 69 genes in which gtfB was markedly upregulated. The conserved DNA motif for EpsR binding was determined by electrophoretic mobility shift assay and DNase I footprinting assays. Moreover, analysis of β-galactosidase activity suggested that EpsR acted as a repressor and inhibited gtfB expression. Taken together, our findings indicate that EpsR is an important transcription factor that regulates gtfB expression and EPS production in S. mutans. These results add new aspects to the complexity of regulating the expression of genes involved in the cariogenicity of S. mutans, which might lead to novel strategies to prevent the formation of cariogenic biofilm that may favor diseases.
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Affiliation(s)
- J Chen
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - A Zhang
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Z Xiang
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - M Lu
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - P Huang
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - T Gong
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Y Pan
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Y Lin
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - X Zhou
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Y Li
- Department of Operative Dentistry and Endodontics, State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Zhou C, He J, Su C, Liang W, Xu S, Wu L, Fu X, Zhang X, Ge D, Chen C, Mao W, Xu L, Shao G, Li W, Hu B, Chen C, Fu J, Wang Z, Jianying Z, Huang Y, Ma H, Liu Y, Ye F, Hu J, Zhao J, Liu X, Liu Z, Wang Z, Xu R, Xiao Z, Gong T, Lin W, Li X, Ding L, Mao L. FP14.11 Icotinib versus Chemotherapy as Adjuvant Treatment for Stage II–IIIA EGFR-Mutant NSCLC (EVIDENCE): A Randomized, Open-Label, Phase 3 Study. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Jiao S, Huang J, Chen Y, Song Y, Gong T, Lu J, Guo T, Zhang J, Zhang C, Chen M. Impacts of Glycemic Control on Intracranial Plaque in Patients with Type 2 Diabetes Mellitus: A Vessel Wall MRI Study. AJNR Am J Neuroradiol 2020; 42:75-81. [PMID: 33272948 DOI: 10.3174/ajnr.a6878] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 08/27/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND PURPOSE The relationship between glycemic control in patients with type 2 diabetes mellitus and intracranial atherosclerotic plaque features has remained understudied. This study aimed to investigate the association of type 2 diabetes mellitus and glycemic control with the characteristics of intracranial plaques using vessel wall MR imaging. MATERIALS AND METHODS In total, 311 patients (217 [69.8%] men; mean age, 63.24 ± 11.44 years) with intracranial atherosclerotic plaques detected on vessel wall MR imaging were enrolled and divided into 3 groups according to type 2 diabetes mellitus and glycemic control statuses: the non-type 2 diabetes mellitus group, the type 2 diabetes mellitus with good glycemic control group, and the type 2 diabetes mellitus with poor glycemic control group. The imaging features of intracranial plaque were analyzed and compared among the groups. The clinical risk factors for atherosclerosis were also analyzed using logistic regression analysis. RESULTS The plaque length and thickness were significantly higher in the type 2 diabetes mellitus with poor glycemic control group than in the non-type 2 diabetes mellitus group. The prevalence of strongly enhanced plaques was significantly higher in the type 2 diabetes mellitus with poor glycemic control group than in the non-type 2 diabetes mellitus and type 2 diabetes mellitus with good glycemic control groups (92.9%, 63.4%, and 72.7%, respectively; P < .001). Multivariate logistic regression analysis showed a significant association of poor glycemic control with the plaque length (OR = 1.966; 95% CI, 1.170-3.303; P = .011), plaque thickness (OR = 1.981; 95% CI, 1.174-3.340; P = .010), and strongly enhanced plaque (OR = 5.448; 95% CI, 2.385-12.444; P < .001). CONCLUSIONS Poor glycemic control, compared with the history of diabetes, might have a greater impact on the burden and vulnerability of intracranial atherosclerotic plaques.
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Affiliation(s)
- S Jiao
- From the Departments of Radiology (S.J., J.H., Y.S., T. Guo, J.Z., C.Z., M.C.)
| | - J Huang
- From the Departments of Radiology (S.J., J.H., Y.S., T. Guo, J.Z., C.Z., M.C.)
| | | | - Y Song
- From the Departments of Radiology (S.J., J.H., Y.S., T. Guo, J.Z., C.Z., M.C.)
| | | | - J Lu
- Neurosurgery (J.L.), Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, P.R. China, Beijing, China
| | - T Guo
- From the Departments of Radiology (S.J., J.H., Y.S., T. Guo, J.Z., C.Z., M.C.)
| | - J Zhang
- From the Departments of Radiology (S.J., J.H., Y.S., T. Guo, J.Z., C.Z., M.C.)
| | - C Zhang
- From the Departments of Radiology (S.J., J.H., Y.S., T. Guo, J.Z., C.Z., M.C.)
| | - M Chen
- From the Departments of Radiology (S.J., J.H., Y.S., T. Guo, J.Z., C.Z., M.C.)
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16
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Lu M, Xiang Z, Gong T, Zhou X, Zhang Z, Tang B, Zeng J, Wang L, Cui T, Li Y. Intrinsic Fluoride Tolerance Regulated by a Transcription Factor. J Dent Res 2020; 99:1270-1278. [PMID: 32485128 DOI: 10.1177/0022034520927385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Fluoride facilitates the remineralization of dental hard tissues and affects bacterial activities. Therefore, it is extensively used as an anti-caries agent in clinical practice and daily life. Although some studies focused on understanding Streptococcus mutans' response to fluoride, the mechanism regulating intrinsic fluoride tolerance is not yet clear. Since the TetR family of transcription factors is associated with multidrug resistance, our aim was to evaluate whether they are related to fluoride tolerance in S. mutans. A mutant library including each S. mutans TetR gene was constructed and the transcription factor fluoride related transcriptional regulator (FrtR) was identified. The in-frame deletion of the S. mutans frtR gene resulted in decreased cell viability under fluoride in both the planktonic state and single-/dual-species biofilms. This in-frame frtR mutant was used for RNA-sequencing and the fluoride related permease gene (frtP) was found as 1 of the downstream genes directly regulated by FrtR. The recombinant FrtR protein was purified, and conserved DNA binding motifs were determined using electrophoretic mobility shift and DNase I footprinting assays. Finally, a series of mutant and complement strains were constructed to perform the minimum inhibitory concentration (MIC) assays, which indicated that frtP upregulation led to the increase of fluoride sensitivity. Collectively, our results indicate that FrtR is an important transcription factor regulating the frtP expression in S. mutans, thus affecting the intrinsic fluoride tolerance. Therefore, this study provides novel insights into a potential target to increase the S. mutans sensitivity to fluoride for a better prevention of dental caries.
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Affiliation(s)
- M Lu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Z Xiang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - T Gong
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - X Zhou
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - Z Zhang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - B Tang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
| | - J Zeng
- West China School of Public Health and West China Fourth Hospital, Sichuan University, Chengdu, Sichuan, China
| | - L Wang
- Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - T Cui
- School of Life Sciences, Northwestern Polytechnical University, Xi'an, Shanxi, China
| | - Y Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China
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Cao L, Wang Z, Gong T, Wang J, Liu J, Jin L, Yuan Q. Discriminating between bronchiolar adenoma, adenocarcinoma in situ and minimally invasive adenocarcinoma of the lung with CT. Diagn Interv Imaging 2020; 101:831-837. [PMID: 32482582 DOI: 10.1016/j.diii.2020.05.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 04/30/2020] [Accepted: 05/05/2020] [Indexed: 02/08/2023]
Abstract
PURPOSE To identify computed tomography (CT) features that may help distinguish bronchiolar adenoma (BA) from lung adenocarcinomas in situ (AIS) and minimally invasive adenocarcinomas (MIA) among lung lesions presenting as ground-glass nodules (GGNs). MATERIALS AND METHODS A total of 140 patients with GGNs confirmed by surgery and pathology, were reviewed retrospectively. There were 68 men and 72 women with a mean age of 64.3±8.9 (SD) years (range: 31 - 85 years). The CT features of BA, AIS, and MIA were analyzed and compared. CT features, including percentage of solid component, maximum diameter of solid component, lesion density, location, margin, shape, pseudo-cavitation, calcification, ill-defined peripheral opacity, and air bronchogram, were analyzed using multivariate logistic regression and receiver operating characteristic curves. RESULTS There were 11/140 (7.9%) patients with BA (mean age, 67.7±7.5 [SD]; range 45 - 77 years), 63/140 (45.0%) patients with AIS (mean age, 62.5±8.6 [SD]; range 36 - 69 years) and 66/140 (47.1%) patients with MIA (mean age, 63.5±7.9 [SD]; range 35 - 72 years). By comparison with AIS and MIA, significantly different CT features of BA included tumor size, solid component diameters, low CT attenuation of the ground-glass component, irregular shape, ill-defined peripheral opacity, pseudo-cavitation, and abnormal pulmonary vein. Ill-defined peripheral opacity (odds ratio, 1.060; 95% confidence interval [CI]: 1.020 - 1.380) and pseudo-cavitation (odds ratio, 1.236; 95% CI: 1.070 - 1.565) were variables independently associated with the diagnosis of BA. CONCLUSION CT provides morphological features that allow differentiating between BA and AIS-MIA among lung lesions presenting as GGNs.
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Affiliation(s)
- L Cao
- Department of Pathology, The Second Hospital of Jilin University, Changchun, 130041 Jilin, China
| | - Z Wang
- Department of Pathology, The Second Hospital of Jilin University, Changchun, 130041 Jilin, China
| | - T Gong
- Department of Radiology, The Second Hospital of Jilin University, Changchun, 130041 Jilin, China
| | - J Wang
- Department of Radiology, The Second Hospital of Jilin University, Changchun, 130041 Jilin, China
| | - J Liu
- Department of Radiology, The Second Hospital of Jilin University, Changchun, 130041 Jilin, China
| | - L Jin
- Department of Radiology, The Second Hospital of Jilin University, Changchun, 130041 Jilin, China.
| | - Q Yuan
- Department of Radiology, The Second Hospital of Jilin University, Changchun, 130041 Jilin, China
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18
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Abstract
The outcome of regenerative procedures could be augmented by enhancing the biological performances of stem cells prior to their transplantation. The current study aimed to investigate whether hypoxic preconditioning through stabilization of hypoxia-inducible factor 1α (HIF-1α) could enhance the angio-/vasculogenic properties of stem cells from human exfoliated deciduous teeth (SHED). HIF-1α expression in SHED under normoxia was stabilized by silencing the expression of prolyl hydroxylase domain-containing protein 2 (PHD2) via lentiviral small hairpin RNA. This in turn significantly increased the expression of an angiogenic factor: vascular endothelial growth factor. Conditioned medium of HIF-1α-stabilized SHED increased the migration and proliferation of human umbilical vein endothelial cells (HUVECs), indicating enhanced paracrine signaling of SHED following PHD2 knockdown (P < 0.05). Furthermore, the coculture of HIF-1α-stabilized SHED with HUVECs directly and in fibrin beads demonstrated significantly longer vascular sprouts through juxtacrine and paracrine effects (P < 0.05). When HIF-1α-stabilized SHED were added to a preformed HUVEC vascular tube network on Matrigel, it not only stabilized the vessels, as shown by the increased thickness (P < 0.05) and junctional area (P < 0.01) of tubes, but also gave rise to new sprouting (P < 0.01). This observation, with the morphologic changes and increased CD31 expression, suggested that HIF-1α stabilization enhanced the endothelial differentiation capacity of SHED through autocrine signaling. In vivo Matrigel plug assay demonstrated that HIF-1α-stabilized SHED alone could give rise to a vasculature that was significantly higher than that of control SHED ± HUVECs and similar to that of HIF-1α-stabilized SHED + HUVECs. In addition to vasculogenesis by endothelial differentiation, HIF-1α-stabilized SHED recruited host blood vessels into the implant by exerting a significant paracrine effect. Taken together, our results confirmed that HIF-1α-stabilized SHED could replace the function of HUVECs and act as the sole cell source of vascularization. Thus, targeting PHD2 to stabilize HIF-1α expression is an appealing strategy that enables the use of a single cell source for achieving vascularized tissue regeneration.
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Affiliation(s)
- Y Han
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - T Gong
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - C Zhang
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
| | - W L Dissanayaka
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
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19
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Gong T, Habara H, Sumioka K, Yoshimoto M, Hayashi Y, Kawazu S, Otsuki T, Matsumoto T, Minami T, Abe K, Aizawa K, Enmei Y, Fujita Y, Ikegami A, Makiyama H, Okazaki K, Okida K, Tsukamoto T, Arikawa Y, Fujioka S, Iwasa Y, Lee S, Nagatomo H, Shiraga H, Yamanoi K, Wei MS, Tanaka KA. Direct observation of imploded core heating via fast electrons with super-penetration scheme. Nat Commun 2019; 10:5614. [PMID: 31819056 PMCID: PMC6901506 DOI: 10.1038/s41467-019-13574-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 03/03/2019] [Accepted: 11/08/2019] [Indexed: 11/09/2022] Open
Abstract
Fast ignition (FI) is a promising approach for high-energy-gain inertial confinement fusion in the laboratory. To achieve ignition, the energy of a short-pulse laser is required to be delivered efficiently to the pre-compressed fuel core via a high-energy electron beam. Therefore, understanding the transport and energy deposition of this electron beam inside the pre-compressed core is the key for FI. Here we report on the direct observation of the electron beam transport and deposition in a compressed core through the stimulated Cu Kα emission in the super-penetration scheme. Simulations reproducing the experimental measurements indicate that, at the time of peak compression, about 1% of the short-pulse energy is coupled to a relatively low-density core with a radius of 70 μm. Analysis with the support of 2D particle-in-cell simulations uncovers the key factors improving this coupling efficiency. Our findings are of critical importance for optimizing FI experiments in a super-penetration scheme.
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Affiliation(s)
- T Gong
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.,Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang, Sichuan, 621900, People's Republic of China
| | - H Habara
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan.
| | - K Sumioka
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - M Yoshimoto
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Hayashi
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Kawazu
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Otsuki
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Matsumoto
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Minami
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Abe
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Aizawa
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Enmei
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Fujita
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - A Ikegami
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H Makiyama
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Okazaki
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Okida
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - T Tsukamoto
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Arikawa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Fujioka
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Y Iwasa
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - S Lee
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H Nagatomo
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - H Shiraga
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - K Yamanoi
- Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - M S Wei
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY, 14623-1299, USA
| | - K A Tanaka
- Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka, 565-0871, Japan. .,Extreme Light Infrastructure: Nuclear Physics, 30 Reatorului, Magurele-Bucharest, 077125, Romania.
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20
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Li S, Gong T, Peng Y, Nieman KM, Gilbertson DT. Prevalence and incidence of systemic lupus erythematosus and associated outcomes in the 2009-2016 US Medicare population. Lupus 2019; 29:15-26. [PMID: 31726936 DOI: 10.1177/0961203319888691] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES We aimed to update data on the prevalence and incidence of systemic lupus erythematosus (SLE) in the Medicare population and describe associated outcomes. METHODS This observational study used Medicare 20% random sample data 2007-2016 to estimate SLE prevalence and incidence 2009-2016. The study population included patients aged ≥18 years (stratified by <65 and ≥65 years) with Medicare fee-for-service coverage. The SLE definition was based on a published and validated algorithm. All-cause death, hospitalizations, and kidney disease incidence were defined for a prevalent SLE cohort 2011-2015. Unadjusted event rates during 5-year follow-up were reported per 100 patient-years. RESULTS The study included > 5 million eligible patients for each year 2009-2016. There were 19,518 (10,898, aged ≥65; 8620, aged <65) in 2016, extrapolated to 97,590 (54,490 aged ≥65; 43,100 aged <65) in the overall 2016 Medicare population. Age- and sex-adjusted prevalence rates (per 100,000 Medicare population) ranged from 301.1 in 2009 to 366.6 in 2016, all ages, and 184.0-239.9, ≥65 years. There were 2614 (1844 aged ≥65; 770 aged <65) incident patients in 2016; age-/sex-adjusted incidence rates (per 100,000 Medicare population) ranged from 46.9 in 2009 to 49.0 in 2016, all ages, and 37.5-40.8, ≥65. Five-year unadjusted mortality, elderly vs. younger, was 8.8 vs. 3.8, morbidity 34.5 vs. 32.4, and kidney disease incidence 19.8 vs. 18.0 per 100 patient-years. CONCLUSIONS Prevalence rates steadily increased while incidence was relatively stable 2009-2016. Our data should be interpreted with caution due to our elderly study population.
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Affiliation(s)
- S Li
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, Minneapolis, USA
| | - T Gong
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, Minneapolis, USA
| | - Y Peng
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, Minneapolis, USA
| | - K M Nieman
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, Minneapolis, USA
| | - D T Gilbertson
- Chronic Disease Research Group, Hennepin Healthcare Research Institute, Minneapolis, USA.,Department of Medicine, University of Minnesota, Minneapolis, USA
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Habara H, Iwawaki T, Gong T, Wei MS, Ivancic ST, Theobald W, Krauland CM, Zhang S, Fiksel G, Tanaka KA. A ten-inch manipulator (TIM) based fast-electron spectrometer with multiple viewing angles (OU-ESM). Rev Sci Instrum 2019; 90:063501. [PMID: 31255022 DOI: 10.1063/1.5088529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 04/23/2019] [Indexed: 06/09/2023]
Abstract
The measurement of angularly resolved energy distributions of mega-electron-volt electrons is important for gaining a better understanding of the interaction of ultra-intense laser pulses with plasma, especially for fast-ignition laser-fusion research. It is also crucial when evaluating the production of suprathermal (several 10-keV) electrons through laser-plasma instabilities in conventional hot-spot-ignition and shock-ignition research. For these purposes, we developed a 10-in. manipulator-based multichannel electron spectrometer-the Osaka University electron spectrometer (OU-ESM)-that combines angular resolution with high-energy resolution. The OU-ESM consists of five small electron spectrometers set at every 5°, with an energy range from ∼40 keV to ∼40 MeV. A low-magnetic-field option provides a higher spectral resolution for an energy range of up to ∼5 MeV. We successfully obtained angularly resolved electron spectra for various experiments on the OMEGA and OMEGA EP laser systems.
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Affiliation(s)
- H Habara
- Graduate School of Engineering, Osaka University, Suita, Osaka 565 0871, Japan
| | - T Iwawaki
- Graduate School of Engineering, Osaka University, Suita, Osaka 565 0871, Japan
| | - T Gong
- Graduate School of Engineering, Osaka University, Suita, Osaka 565 0871, Japan
| | - M S Wei
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - S T Ivancic
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - W Theobald
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623-1299, USA
| | - C M Krauland
- General Atomics, San Diego, California 92121-1122, USA
| | - S Zhang
- Department of Mechanical and Aerospace Engineering, University of California at San Diego, La Jolla, California 92093, USA
| | - G Fiksel
- Center for Ultrafast Optical Science, University of Michigan, Ann Arbor, Michigan 48109, USA
| | - K A Tanaka
- Graduate School of Engineering, Osaka University, Suita, Osaka 565 0871, Japan
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Li W, Jiao S, Xu L, Chen YH, Wang Y, Gong T. [Clinical features of cerebral amyloid angiopathy characterized by cortical superficial siderosis]. Zhonghua Yi Xue Za Zhi 2019; 99:1397-1400. [PMID: 31137127 DOI: 10.3760/cma.j.issn.0376-2491.2019.18.008] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Objective: To study the clinical and imaging characteristics of cerebral amyloid angiopathy characterized by cortical superficial siderosis and improve clinicians' understanding of the disease. Methods: Retrospective analysis was performed on 16 patients with cerebral amyloid angiopathy characterized by cortical superficial siderosis from June 2013 to August 2016 in Beijing Hospital, and the information including epidemiological data, clinical features, cranial MRI and electroencephalogram (EEG) results were analyzed. Results: The ratio of male to female in 16 patients was 1.67∶1, and the average age of onset was 73 (69-79) years. The most common clinical symptoms were transient focal neurological episodes (TFNEs)(12/16). Cranial MRI showed localized (9/16) and diffuse type cortical superficial siderosis (7/16); few of them were associated with different degrees of cerebral microbleeds. Most of the EEG findings were normal (6/9) and a few showed focal slow waves (3/9). During a mean follow-up of 17 (17±11) months, 5 patients developed repeated TFNE, of which 1 had cerebral hemorrhage. Conclusions: Cerebral amyloid angiopathy characterized by cortical superficial siderosis occurs predominantly in the elderly. TFNE is the most common clinical manifestation. Cranial MRI is the most important diagnostic method, and antithrombotic therapy should be avoided as much as possible.
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Affiliation(s)
- W Li
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - S Jiao
- Radiology Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - L Xu
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Y H Chen
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Y Wang
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - T Gong
- Neurology Department, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
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23
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Gong T, Xu J, Heng B, Qiu S, Yi B, Han Y, Lo ECM, Zhang C. EphrinB2/EphB4 Signaling Regulates DPSCs to Induce Sprouting Angiogenesis of Endothelial Cells. J Dent Res 2019; 98:803-812. [PMID: 31017515 DOI: 10.1177/0022034519843886] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Dental pulp stem cells (DPSCs) are capable of facilitating angiogenesis resembling pericytes when located adjacent to endothelial cells (ECs). Nevertheless, the precise mechanisms orchestrating their proangiogenic functions remain unclear. Using a 3-dimensional (3-D) fibrin gel model, we aimed to investigate whether EphrinB2/EphB4 signaling in DPSCs plays a role in supporting vascular morphogenesis mediated by ECs, together with the underlying mechanism involved. The EphrinB2/EphB4 signaling was inhibited either by a pharmacological inhibitor of EphB4 receptor or by knocking down the expressions of EphrinB2 and EphB4 using lentiviral small hairpin RNA (shRNA). DPSCs were either encapsulated in fibrin gel together with human umbilical vein endothelial cells (HUVECs) or cultured as a monolayer on top of HUVECs to investigate both paracrine and juxtacrine interactions simultaneously. Following 10 d of direct coculture, we found that pharmacological inhibition of EphrinB2/EphB4 signaling severely impaired vessel formation and laminin deposition. When directly cocultured with HUVECs, knockdown of EphrinB2 or EphB4 in DPSCs significantly inhibited endothelial sprouting, resulting in less capillary sprouts with reduced vessel length (P < 0.05). By contrast, when DPSCs were not in direct contact with HUVECs, attenuation of EphrinB2 or EphB4 expression levels in DPSCs did not exert any significant effects on capillary morphogenesis. Noticeably, exogenous stimulation with soluble EphrinB2-Fc or EphB4-Fc (1 µg/mL) enhanced vascular endothelial growth factor (VEGF) secretion from DPSCs, thereby moderately promoting angiogenic cascades in the fibrin matrix. This study, for the first time, reveals a crucial role of EphrinB2/EphB4 signaling in regulating the capacity of DPSCs to induce sprouting angiogenesis. These findings advance our understanding of postnatal angiogenesis and may have future regenerative medicine applications.
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Affiliation(s)
- T Gong
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China.,4 HKU Shenzhen Institute of Research and Innovation, Hong Kong, China
| | - J Xu
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - B Heng
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - S Qiu
- 2 Shenzhen Key Laboratory of ENT, Institute of ENT & Longgang ENT Hospital, Shenzhen, China
| | - B Yi
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Y Han
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - E C M Lo
- 3 Dental Public Health, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - C Zhang
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Pokfulam, Hong Kong, China.,4 HKU Shenzhen Institute of Research and Innovation, Hong Kong, China
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Abstract
Background Children with asthma and atopic diseases have an increased risk of depression or anxiety. Each of these diseases has strong genetic and environmental components; therefore, it seems likely that there is a shared liability rather than causative risk. Objective To investigate the existence and nature of familial aggregation for the comorbidity of atopic diseases and depression or anxiety. Methods Participants came from the Childhood and Adolescent Twin Study in Sweden (CATSS), n = 14 197. Current and ever asthma, eczema, hay fever and food allergy were reported by parents. Internalizing disorders were identified using validated questionnaires. Familial co‐aggregation analysis compared monozygotic (MZ) twins and same‐sex dizygotic (DZ) twins for atopic disease in 1 twin with internalizing disorder in the other to test for genetic liability. Several familial liability candidates were also tested including parental education, recent maternal psychological stress, childhood family trauma and parental country of birth. Results Familial co‐aggregation analysis found that if 1 twin had at least 1 current atopic disease the partner twin was at risk of having an internalizing disorder regardless of their own atopic status (adjusted OR 1.22 (95% CI 1.08, 1.37). Similar results were found for each atopic disease ever and current. MZ associations were not higher than DZ associations, suggesting that the liability is not genetic in nature. Including other familial candidates to the models made little difference to effect estimates. Conclusions and Clinical Relevance Atopic diseases and depression or anxiety tend to occur together in families; therefore, when treating for 1 disease, the physician should consider comorbidity in both the individual and the individual's siblings. We did not find evidence to support a genetic explanation for comorbidity, and further exploration is needed to disentangle the environmental and epigenetic reasons for familial aggregation.
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Affiliation(s)
- B K Brew
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - C Lundholm
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - T Gong
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
| | - H Larsson
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,School of Medical Sciences, Örebro University, Örebro, Sweden
| | - C Almqvist
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.,Pediatric Allergy and Pulmonology Unit at Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
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Abstract
Low efficiency of deriving endothelial cells (ECs) from adult stem cells hampers their utilization in tissue engineering studies. The purpose of this study was to investigate whether suppression of transforming growth factor beta (TGF-β) signaling could enhance the differentiation efficiency of dental pulp-derived stem cells into ECs. We initially used vascular endothelial growth factor A (VEGF-A) to stimulate 2 dental pulp-derived stem cells (dental pulp stem cells and stem cells from human exfoliated deciduous teeth [SHED]) and compared their differentiation capacity into ECs. We further evaluated whether the vascular endothelial growth factor receptor I (VEGF-RI)-specific ligand placental growth factor-1 (PlGF-1) could mediate endothelial differentiation. Finally, we investigated whether the TGF-β signaling inhibitor SB-431542 could enhance the inductive effect of VEGF-A on endothelial differentiation, as well as the underlying mechanisms involved. ECs differentiated from dental pulp-derived stem cells exhibited the typical phenotypes of primary ECs, with SHED possessing a higher endothelial differentiation potential than dental pulp stem cells. VEGFR1-specific ligand-PLGF exerted a negligible effect on SHED-ECs differentiation. Compared with VEGF-A alone, the combination of VEGF-A and SB-431542 significantly enhanced the endothelial differentiation of SHED. The presence of SB-431542 inhibited the phosphorylation of Suppressor of Mothers Against Decapentaplegic 2/3 (SMAD2/3), allowing for VEGF-A-dependent phosphorylation and upregulation of VEGFR2. Our results indicate that the combination of VEGF-A and SB-431542 could enhance the differentiation of dental pulp-derived stem cells into endothelial cells, and this process is mediated through enhancement of VEGF-A-VEGFR2 signaling and concomitant inhibition of TGF-β-SMAD2/3 signaling.
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Affiliation(s)
- J G Xu
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - T Gong
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.,2 HKU Shenzhen Institute of Research and Innovation, Hong Kong, China
| | - Y Y Wang
- 3 Key Laboratory of Oral Diseases Research of Anhui Province, Hefei, China
| | - T Zou
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.,2 HKU Shenzhen Institute of Research and Innovation, Hong Kong, China
| | - B C Heng
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.,2 HKU Shenzhen Institute of Research and Innovation, Hong Kong, China
| | - Y Q Yang
- 4 Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - C F Zhang
- 1 Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.,2 HKU Shenzhen Institute of Research and Innovation, Hong Kong, China
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Gong T, Chen O, Liu Y, Zhao X, Wu KD. [Synchronous multifocal laryngeal squamous carcinoma a case report]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:961-962. [PMID: 29798423 DOI: 10.13201/j.issn.1001-1781.2017.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Indexed: 11/12/2022]
Abstract
An aged female complained intermittent hoarse 10 years, without swallowing and breathing difficulties. A month ago, this patient's voice hoarse became worse, she also had sore throat and pharyngeal foreign body sensation at the same time. There are visible lesions on the right side of the vocal cords, anterior commissure and on the left side of the ventricular bands. Laryngeal CT: the right side of the vocal cords has increased thickness, and hyper density with mild enhancement.
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Luo XJ, Chen M, Zhang C, Song GD, Li CM, Gong T, Zhou JY. [Preliminary application of amide proton transfer imaging signal in acute ischemic stroke]. Zhonghua Yi Xue Za Zhi 2016; 96:2336-2341. [PMID: 27524192 DOI: 10.3760/cma.j.issn.0376-2491.2016.29.011] [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: 06/06/2023]
Abstract
OBJECTIVE To apply amide proton transfer magnetic resonance imaging (APT-MRI) technique to acute ischemic stroke, and to discuss clinical values of the APT-MRI main parameter - MTRasym(3.5 ppm). METHODS A total of 18 emergency admitted patients, with acute ischemic stroke from Beijing Hospital, were recruited from March to November 2015. Eventually, 18 patients (male 14, female 4, average age 72 years old, age ranged from 52 to 92 years, symptom onset ≤24 hours, 2 patients≤ 6 hours) were included in this study. All patients underwent MR scanning on the brain at 3.0 Tesla. Besides the conventional scans for stroke, the APT sequence (saturation time 0.8 s, saturation power 2 μT) was performed. APT weighted (APTW) images were calculated using magnetization transfer ratio asymmetry at 3.5 ppm with respect to water. MRI signals in APTW, diffusion weighted images (DWI) and fluid attenuated iversion recovery (FLAIR) were visually evaluated. Shapiro-Wilk tests were performed to find out the distribution of MTRasym(3.5 ppm) in the whole sample, infarction regions, and normal appearing white matter (NAWMs), respectively. Detrended normal P-P plots were also used to evaluate its normality. Paired-t test and two-sample t test were applied to compare the mean MTRasym(3.5 ppm) of infarction regions with that of contra lateral NAWMs. RESULTS (1) High signal intensity was observed in DWI and FLAIR in all 18 patients. However, signal intensity was somewhat different in APTW. 13 patients were found decreased APT effect, and 5 patients were with equal APT effect in infarction regions. In NAWMs, 14 patients were found equal APT effect, and 4 patients were with decreased APT effect. (2) MTRasym(3.5 ppm)s were proven, with Shapiro-Wilk test, to distribute normally within the whole sample (W=0.964, P=0.288), infarction regions (W=0.962, P=0.645), and NAWMs(W=0.929, P=0.187). However, its normality was not so satisfactory due to greater deviations (absolute value>0.06) of some cases in detrended normal P-P plots. (3) Paired-t test analysis showed that MTRasym(3.5 ppm) in infarction regions (-0.035%±1.020%) was significantly lower than that in NAWMs (0.386%±0.790%) (t=-2.273, P=0.036). However, there was no statistically significant difference between infarction regions and NAWMs when two sample t-test was performed (t=-1.386, P=0.175). CONCLUSION MTRasym(3.5 ppm) can be used to evaluate acute ischemic stroke with a broad future scope in clinical.
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Affiliation(s)
- X J Luo
- Department of Radiology, Beijing Hospital, Beijing 100730, China
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Abstract
The protection and sustainable utilization of natural resources are among the most pressing global problems of the 21st century.
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Affiliation(s)
- W. C. Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Institute of Materia Medica
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Beijing 100050
| | - T. Gong
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Institute of Materia Medica
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Beijing 100050
| | - P. Zhu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines
- Institute of Materia Medica
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Beijing 100050
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Almqvist C, Örtqvist AK, Gong T, Wallas A, Ahlén KM, Ye W, Lundholm C. Individual maternal and child exposure to antibiotics in hospital - a national population-based validation study. Acta Paediatr 2015; 104:392-5. [PMID: 25545741 DOI: 10.1111/apa.12916] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/07/2014] [Accepted: 12/19/2014] [Indexed: 11/27/2022]
Abstract
AIM Exposure to antibiotics in early life may affect future health. Most antibiotics are prescribed in outpatient care, but inpatient exposure is also important. We estimated how specific diagnoses in hospitals corresponded to individual antibiotic exposure. METHODS All pregnant women and children from birth to 5 years of age with infectious diseases and common inpatient diagnoses between July 2005 and November 2011 were identified from the Swedish National Patient Register. Random samples of individuals from predefined groups were drawn, and medical records received from the clinics were manually reviewed for antibiotics. RESULTS Medical records for 4319 hospital visits were requested and 3797 (88%) were received. A quarter (25%) of children diagnosed as premature had received antibiotics, and in children from one to 5 years of age, diagnoses associated with bacterial infections were more commonly treated with antibiotics (62.4-90.6%) than those associated with viruses (6.3-22.2%). Pregnant women who had undergone a Caesarean section were more likely to be treated with antibiotics than those who had had a vaginal delivery (40.1% versus 11.1%). CONCLUSION This study defines the proportion of new mothers and young children who received individual antibiotic treatment for specific inpatient diagnoses in Sweden and provides a useful basis for future studies focusing on antibiotic use.
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Affiliation(s)
- C Almqvist
- Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
- Astrid Lindgren Children's Hospital; Lung and Allergy Unit; Karolinska University Hospital; Stockholm Sweden
| | - AK Örtqvist
- Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
| | - T Gong
- Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
| | - A Wallas
- Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
| | - KM Ahlén
- Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
| | - W Ye
- Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
| | - C Lundholm
- Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
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Yakacki CM, Saed M, Nair DP, Gong T, Reed SM, Bowman CN. Tailorable and programmable liquid-crystalline elastomers using a two-stage thiol–acrylate reaction. RSC Adv 2015. [DOI: 10.1039/c5ra01039j] [Citation(s) in RCA: 229] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A methodology is introduced to synthesize main-chain liquid-crystalline elastomers (LCEs) using a thiol–acrylate-based reaction. This method can program an aligned LCE monodomain and offer spatio-temporal control over liquid-crystalline behavior.
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Affiliation(s)
- C. M. Yakacki
- Department of Mechanical Engineering
- University of Colorado Denver
- Denver
- USA
| | - M. Saed
- Department of Mechanical Engineering
- University of Colorado Denver
- Denver
- USA
| | - D. P. Nair
- Department of Chemical and Biological Engineering
- University of Colorado Boulder
- Boulder
- USA
| | - T. Gong
- Department of Chemical and Biological Engineering
- University of Colorado Boulder
- Boulder
- USA
| | - S. M. Reed
- Department of Chemistry
- University of Colorado Denver
- Denver
- USA
| | - C. N. Bowman
- Department of Chemical and Biological Engineering
- University of Colorado Boulder
- Boulder
- USA
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Zhou YQ, Zhou Z, Qian MF, Gong T, Wang JD. Association of thyroid carcinoma with pregnancy: A meta-analysis. Mol Clin Oncol 2014; 3:341-346. [PMID: 25798264 DOI: 10.3892/mco.2014.472] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [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: 06/09/2014] [Accepted: 09/12/2014] [Indexed: 11/05/2022] Open
Abstract
A number of scholars reported that reproductive factors play a significant role in thyroid cancer and the correlation between the two may affect the diagnosis and treatment of thyroid carcinoma during pregnancy. To determine whether pregnancy reproductive factors affect thyroid carcinoma, we conducted a meta-analysis of studies that investigated the association between pregnancy factors and thyroid carcinoma. PubMed, OVID and the Cochrane Library were searched from their inception to April 1st, 2013. The searched publications mainly investigated reproductive factors and the morbidity or prognosis of female thyroid carcinoma. The studies were filtered by predetermined standards and the quality of the included studies was evaluated by the Newcastle-Ottawa scale inventory. Two researchers independently extracted information on first author, year of publication, study design (case-control or prospective cohort), compared populations, inclusion and exclusion criteria and total sample size. Other researchers assessed the studies for publication bias and performed statistical analyses. Discrepancies were resolved by consensus. A total of 21 studies were selected for the meta-analysis, including 406,329 cases in total. Compared to the control group, the risk of thyroid carcinoma in women with a history of pregnancy was not significantly discrepant, [odds ratio (OR)=1.00, 95% confidence interval (CI): 0.91-1.11]. However, the risk of thyroid carcinoma in women with a history of ≥ 3 pregnancies was significantly increased (OR=1.39, 95% CI: 1.21-1.59). Furthermore, an interval of ≤ 5 years since the last pregnancy was closely associated with thyroid carcinoma (OR=1.53, 95% CI: 1.29-1.81). The patients developed thyroid carcinoma during pregnancy did not exhibit an increased risk of lymphatic metastasis (OR=0.94, 95% CI: 0.53-1.67); the risk of distant metastasis also did not increase significantly (OR=1.03, 95% CI: 0.86-1.24). Therefore, multiple pregnancies and a ≤ 5-year interval between pregnancies were identified as high-risk factors for thyroid carcinoma, whereas thyroid carcinoma during pregnancy was not associated with a significant risk of lymphatic and distant metastasis.
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Affiliation(s)
- Y Q Zhou
- Department of Head and Neck Surgery, Ren Ji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - Z Zhou
- Department of Head and Neck Surgery, Ren Ji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - M F Qian
- Department of Head and Neck Surgery, Ren Ji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - T Gong
- Department of Head and Neck Surgery, Ren Ji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - J D Wang
- Department of Head and Neck Surgery, Ren Ji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, P.R. China
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Qi L, Liu J, Zhang Y, Wang J, Yang M, Gong T, Shen M, Du Y. Risk factors for non‐syndromic oral clefts: a matched case–control study in
H
ubei Province,
C
hina. Oral Dis 2013; 21:31-7. [DOI: 10.1111/odi.12200] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2013] [Revised: 08/21/2013] [Accepted: 10/09/2013] [Indexed: 11/29/2022]
Affiliation(s)
- L Qi
- Department of Maternal and Children Health care School of Public Health Tongji Medical College Huazhong University of Science and Technology WuhanChina
| | - J Liu
- Department of Child Health Hubei Maternal and Children's Healthcare Hospital WuhanChina
| | - Y Zhang
- Department of Maternal and Children Health care School of Public Health Tongji Medical College Huazhong University of Science and Technology WuhanChina
| | - J Wang
- Department of Psychology East China Normal University Shanghai China
| | - M Yang
- Department of Maternal and Children Health care School of Public Health Tongji Medical College Huazhong University of Science and Technology WuhanChina
| | - T Gong
- Department of Maternal and Children Health care School of Public Health Tongji Medical College Huazhong University of Science and Technology WuhanChina
| | - M Shen
- Department of Maternal and Children Health care School of Public Health Tongji Medical College Huazhong University of Science and Technology WuhanChina
| | - Y Du
- Department of Maternal and Children Health care School of Public Health Tongji Medical College Huazhong University of Science and Technology WuhanChina
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Yang M, Gong T, Lin X, Qi L, Guo Y, Cao Z, Shen M, Du Y. Maternal gene polymorphisms involved in folate metabolism and the risk of having a Down syndrome offspring: a meta-analysis. Mutagenesis 2013; 28:661-71. [DOI: 10.1093/mutage/get045] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Peng Q, Sun X, Gong T, Wu CY, Zhang T, Tan J, Zhang ZR. Injectable and biodegradable thermosensitive hydrogels loaded with PHBHHx nanoparticles for the sustained and controlled release of insulin. Acta Biomater 2013; 9:5063-9. [PMID: 23036950 DOI: 10.1016/j.actbio.2012.09.034] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 09/22/2012] [Accepted: 09/25/2012] [Indexed: 01/04/2023]
Abstract
Biodegradable PHBHHx (poly(3-hydroxybutyrate-co-3-hydroxyhexanoate)) nanoparticles containing insulin phospholipid complex were loaded in chitosan-based thermosensitive hydrogels for long-term sustained and controlled delivery of insulin. The injectable hydrogels, prepared by adding β-glycerophosphate disodium salt (GP) solution to chitosan (CS) solution under stirring, showed a rapid solution-to-gel transition at 37 °C, a porous structure and a comparative degradation and swelling rate in vitro. In the in vitro release studies, only 19.11% of total insulin was released from the nanoparticle-loaded hydrogel (NP-CS/GP) within 31 days. However, 96.41% of total insulin was released from the free insulin-loaded hydrogel (INS-CS/GP) within 16 days. Most importantly, the hypoglycemic effect of NP-CS/GP following subcutaneous injection in diabetic rats lasted for >5 days, much longer than the effect caused by INS-CS/GP or other long-acting insulin formulations. The pharmacological availability of NP-CS/GP relative to INS-CS/GP was 379.85%, indicating that the bioavailability of insulin was significantly enhanced by NP-CS/GP gels. Therefore, biodegradable and thermosensitive NP-CS/GP gels have great potential for use in novel ultralong-acting insulin injections. In addition, the NP-loaded hydrogel system also paves the way for long-term delivery of other proteins and peptides.
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Affiliation(s)
- Q Peng
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University, Chengdu 610041, People's Republic of China
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Zhang Q, Liang Z, Chen LY, Sun X, Gong T, Zhang ZR. Novel brain targeting prodrugs of naproxen based on dimethylamino group with various linkages. ACTA ACUST UNITED AC 2012; 62:261-6. [PMID: 22407924 DOI: 10.1055/s-0032-1306273] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
As a preventive and treatment drug for Alzheimer's disease (AD), naproxen's clinical application is hampered by its limited distribution in the brain. To increase the delivery of naproxen across the blood-brain barrier (BBB), 3 prodrugs (P1, P2 and P3) of naproxen were synthesized through either ester bond or amido bond using the dimethylamino moiety as a brain-targeting ligand. The in vitro release of naproxen from the 3 prodrugs was studied in PBS, rat plasma and brain homogenate. P3 with an amido bond appeared to be highly stable in all incubation media, whereas P1 and P2 with ester bonds were partially hydrolyzed in alkaline environment and brain homogenate to yield the parent drug. After i. v. administration to rats, the brain concentration of total naproxen (summation of released and bound naproxen, TN) of P1, P2 and P3 groups were 28.81, 24.51 and 15.54 times greater than that of the control naproxen group at 5 min, respectively, and the brain AUC0-t were 6.94, 10.06 and 6.70 times greater than that of the control naproxen group. In addition, the Cmax of TN in the brain after the administration of prodrugs with ester bonds (P1 and P2) was higher than that of the amide prodrug (P3). The results highlighted the possibility of brain delivery of naproxen using prodrug strategies based on the brain-targeting ligand with dimethylamino moiety, in which the linkage between drug and targeting group might play an important role in modulating the in vivo behaviors of these prodrugs.
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Affiliation(s)
- Q Zhang
- Sichuan University, Chengdu, People's Republic of China
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Zhang Y, Gong T, Liu WJ, Wei JQ, Zhang XF, Wang KL, Zhong ML, Wu DH. Angle-dependent light emission from aligned multiwalled carbon nanotubes under CO(2) laser irradiation. Nanotechnology 2007; 18:075710. [PMID: 21730518 DOI: 10.1088/0957-4484/18/7/075710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reports the light emission from aligned multiwalled carbon nanotubes (MWNTs) under continuous wave CO(2) laser (λ = 10.6 µm) irradiation. Results indicate that the light emission is dependent on the angle θ between the laser incident direction and the nanotube axis. The relative intensity of the light emission at certain wavelengths shows a Lorentzian feature when θ varies from 0° to 90°. The Lorentzian fitting curve displays a distinct tendency between shorter (λ<600 nm) and longer wavelength (λ>700 nm). A minimum intensity was observed at θ(m) close to 67° under shorter wavelength, whereas a maximum intensity was shown at θ(m) of about 60° at longer wavelength. These results show the anisotropic property of aligned MWNTs.
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Affiliation(s)
- Y Zhang
- Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, People's Republic of China
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Li LL, Zhang ZR, Gong T, He LL, Deng L. Simultaneous determination of Gastrodin and Ligustrazine hydrochloride in dog plasma by gradient high-performance liquid chromatography. J Pharm Biomed Anal 2006; 41:1083-7. [PMID: 16574365 DOI: 10.1016/j.jpba.2006.02.023] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Revised: 02/14/2006] [Accepted: 02/14/2006] [Indexed: 11/24/2022]
Abstract
A novel reversed-phase HPLC method was developed for the simultaneous determination of Gastrodin (Gas) and Ligustrazine hydrochloride (LZH) in dog plasma after oral administration of the preparation 'Tianxiong Capsule'. The assay involves deproteinization, extraction and subsequent detection with a gradient solvent system at two different wavelengths. Retention times were 10.6 and 18.9 min for Gas and LZH, respectively. Linear responses were observed over a wide range (0.40-200.0 microg/ml for Gas and 0.0999-39.96 microg/ml for LZH) in plasma. The mean intra- and inter-assay variation coefficients were 2.7 and 3.4% for Gas and 3.4 and 4.2% for LZH, respectively. The average extract recoveries were 76.77% for Gas and 75.8% for LZH. This assay has been successfully used to provide pharmacokinetic data for Gastrodin with oral administration of Tianxiong capsules.
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Affiliation(s)
- L L Li
- Renmin Nan Road, West China School of Pharmacy, Sichuan University, 610041, PR China
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Gong T, Wang X. Long-term follow-up study of 72 patients with transient ischemic attacks. Chin Med J (Engl) 2001; 114:1270-2. [PMID: 11793850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
OBJECTIVE To observe the long-term follow-up of 72 patients with transient ischemic attack (TIA) and evaluate the clinical significance of neurovascular surgical indication. METHODS Seventy-two patients with TIA collected from years 1959 to 1977 were followed up by means of face-to-face communication with the patients themselves or their families till year 1998. According to the principle of life table, the recurrence of TIA after the first attack, occurrence of complete stroke and myocardial infarction, fatality rate, causes of death and survival rate every year, and the 95% confidence interval were calculated and analyzed. RESULTS Till 1998, the recurrent rate of TIA in 72 patients was 27.9%, the occurrence rate of complete stroke 65.7%, and that of myocardial infarction 8.4%. The fatality rate was 72.7%. Among the deaths, 2 (3.8%) patients died of myocardial infarction. It was shown from the study that the main cause of death was complete stroke, accounting for 59.6% of all deaths, with the main cause in non-elderly patients being cerebral hemorrhage, and that in the elderly patients being cerebral infarction. The 20-year survival rate was 39.9% and its 95% confidence interval was (28.4%, 51.4%). Nineteen cases were indicated for neurovascular surgical operation, accounting for 26.6% of the 72 patients. CONCLUSIONS In the long-term follow-up study, about one third of the patients had the recurrent TIA. The occurrence rate of complete stroke was markedly higher than that of myocardial infarction. Presumably, the effect of neurovascular surgical operation on the prevention of complete stroke in patients with TIA is limited.
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Affiliation(s)
- T Gong
- Department of Neurology, Beijing Hospital, Beijing 100730, China
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Zhu Q, Lou Y, Wang Y, Gong T, Qie C. [Determination of adenosine in Rehmannia glutinosa Libosch. by HPLC]. Zhongguo Zhong Yao Za Zhi 1998; 23:711, 721, 762. [PMID: 12242818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
OBJECTIVE To establish a method to determine the contents of asenosine in different species of Rehmannia glutinosa. METHOD The contents were determined by HPLC, with a column of KYWG-C18 as stationary phase, 6% ace tonitrile as mobile phase and detecting wavelength at 260 nm. RESULT Adenosine has a good linearity in the range of 0.002 mg/ml-0.01 mg/ml, Y = 1.7742 x 10(-4) + 8.9021 x 10(-7) X, r = 0.9995. The average recovery is 94.1% and RSD = 1.86% (n = 5). CONCLUSION The method is fast, reliable and simple.
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Affiliation(s)
- Q Zhu
- Beijing Municipal Institute of Clinical Pharmacy Research, Beijing 100035
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Gong T, Cao YM, Zhuang BX. [Effect of jiawei dachaihu decoction on blood T lymphocyte subsets and tumor necrosis factor in patients with obstructive jaundice]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1997; 17:660-2. [PMID: 10322845] [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: 02/12/2023]
Abstract
OBJECTIVE To observe the effect of the preoperative Jiawei Dachaihu decoction in improving cellular immune functions in patients with obstructive jaundice. METHODS Forty patients were randomly divided into two groups with (group B) and without (group A) the herbal therapy. And their preoperative T lymphocyte subsets, TNF and the postoperative dynamic changes were measured. RESULTS CD3, CD4 and CD4/CD8 decreased and TNF increased in the patients. CD3, CD4 and CD4/CD8 decreased much less and were lower than preoperative levels 2 days after the operation. CD3, CD4 and CD4/CD8 were higher and TNF lower than preoperative levels in group A after 20 days of the operation (all of them P < 0.05). CONCLUSIONS The operation could be helpful to recover immune functions of T lymphocyte and decrease TNF levels. The perioperative herbal therapy is an important adjuvant measure.
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Affiliation(s)
- T Gong
- Hebei Provincial People's Hospital, Shijiazhuang
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41
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Hou S, He Y, Zhang Y, Liao G, Gong T, Li C, Tang C. [Reasonability of extracting procedures for huiyangfanben decoction]. Zhongguo Zhong Yao Za Zhi 1996; 21:606-8, 640. [PMID: 9772629] [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: 02/09/2023]
Abstract
The reasonability of extracting procedures for traditional Chinese prescriptions was studied with Huiyangfanben Decoction as sample. The comparative results of the ingredients in extractions prepared by different procedures revealed. For the prescriptions with complicated ingredients, more attention should be paid to the ingredients and their characteristics when designing the extracting procedurs, and in extraction the drugs should be classified according to the interaction of the ingredients. More extracting solvents could be used according to the characteristics of the active ingredients.
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Affiliation(s)
- S Hou
- School of Pharmacy, West China University of Medical Science, Chengdu
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Zhang M, Hou S, Gong T, Cheng Y, Liao G. [The distribution and pharmacokinetics in lung of bovine serum albumin microspheres for pulmonary targeting in mice]. Hua Xi Yi Ke Da Xue Xue Bao 1994; 25:393-7. [PMID: 7744380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
125I-labeled bovine serum albumin microspheres loaded cisplatinum (CDDP-125I-BSA-MS) with the size range of 7-25 microns were prepared and injected into the tail vein of mice. The results showed that the microspheres were accumulated almost entirely in the lung after i.v. injection (about 97.52% injected dose at the highest concentration). While in blood and other organs almost no accumulation was found. Photomicrographs showed that microspheres reached the lung and lodged in precapillary arteriols and capillaries of lung. The microspheres in lung were eliminated gradually. The pharmacokinetics of microspheres in lung of mice was also studied with "practical pharmacokinetic program-version 87", and was fitted by two-compartment model with i.v. injection or one-compartment model with 1st order absorption, but the meaning of some parameters changed. Based on the analysis of the models and parameters, it was concluded that the pharmacokinetics of microspheres in lungs can be described by the model of "one-compartment of first-order intake and first-order elimination".
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Young JF, Gong T, Fauchet PM, Kelly PJ. Carrier-carrier scattering rates within nonequilibrium optically injected semiconductor plasmas. Phys Rev B Condens Matter 1994; 50:2208-2215. [PMID: 9976435 DOI: 10.1103/physrevb.50.2208] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gong T, Zheng LX, Xiong W, Kula W, Kostoulas Y, Sobolewski R, Fauchet PM. Femtosecond optical response of Y-Ba-Cu-O thin films: The dependence on optical frequency, excitation intensity, and electric current. Phys Rev B 1993; 47:14495-14502. [PMID: 10005802 DOI: 10.1103/physrevb.47.14495] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Gong T, Fauchet PM, Young JF, Kelly PJ. Femtosecond gain dynamics due to initial thermalization of hot carriers injected at 2 eV in GaAs. Phys Rev B Condens Matter 1991; 44:6542-6545. [PMID: 9998524 DOI: 10.1103/physrevb.44.6542] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Nighan WL, Gong T, Fauchet PM. Generation and control of solitons and solitonlike pulses in a femtosecond ring dye laser. Opt Lett 1989; 14:447-449. [PMID: 19749948 DOI: 10.1364/ol.14.000447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We control the generation of solitons and solitonlike pulses in a passively mode-locked dye laser by adjustment of group-velocity dispersion, self-phase modulation, and spectral filtering. Without spectral filtering, periodic pulse shaping reminiscent of higher-order solitons is observed. The pulses differ from the classic solitons because of additional shaping mechanisms. With spectral filtering, pulses are generated that can be described analytically as asymmetric N = 2 solitons. The results indicate an effect analogous to the soliton self-frequency shift observed in optical fibers. The remarkable stability achieved allows for accurate characterization and control.
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Chávez LA, Balamuth W, Gong T. A light and electron microscopical study of a new, polymorphic free-living amoeba, Phreatamoeba balamuthi n. g., n. sp. J Protozool 1986; 33:397-404. [PMID: 3746722 DOI: 10.1111/j.1550-7408.1986.tb05630.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A new amoeba, isolated from well water in Gambia, West Africa, is described and named Phreatamoeba balamuthi n. g., n. sp. Requiring anaerobic conditions for growth, it is easily cultured monoxenically with Escherichia coli or axenically in complex, undefined organic media. Three phenotypes have been observed in the life cycle: an amoeba, a flagellate, and a cyst. The amoeba moves by monopodia, is predominantly multinucleate, and varies from 11 to 160 microns in length. The flagellate has a single flagellum and is from 6 to 50 microns long. The cyst is surrounded by a resistant wall that lacks pores and ranges from 9 to 18 microns in diameter. The transformation from amoeba to flagellate can be induced nutritionally, the exact inducing factor(s) being unknown. Sexual reproduction has not been observed.
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