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Ren ZG, Xu Y, Hua ZZ, Mo ZY, Wang LW, Shi GB, Liu WL, Sun W, Zheng BQ, Wang CM, Jin YJ, Chen Y. [Efficacy of adjuvant programmed cell death 1 (PD-1) monoclonal antibody immunotherapy in Chinese patients with resected stage Ⅱ-Ⅲ melanoma]. Zhonghua Zhong Liu Za Zhi 2023; 45:973-980. [PMID: 37968084 DOI: 10.3760/cma.j.cn112152-20230331-00140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/17/2023]
Abstract
Objective: To explore the efficacy of adjuvant programmed cell death 1 (PD-1) monoclonal antibody immunotherapy in Chinese patients with resected stage Ⅱ-Ⅲ melanoma. Methods: A total of 296 patients who underwent radical surgery for stage Ⅱ-Ⅲ cutaneous orlimb melanoma at Fudan University Shanghai Cancer Center and Shanghai Electric Power Hospital between 2017 and 2021 and received adjuvant PD-1 monoclonal antibody immunotherapy, low-dose interferon (IFN), or observational follow-up were enrolled in this study. Patients were divided into the PD-1 monoclonal antibody group (164 cases) and the IFN or observation group (IFN/OBS group, 132 cases) based on postoperative adjuvant treatment methods. Patients' disease recurrence and survival were observed. Results: Among the 296 patients, 77 had cutaneous melanoma and 219 had limb melanoma; 110 were stage Ⅱ and 186 were stage Ⅲ. Among stage Ⅱ patients, the median recurrence-free survival (RFS) in the PD-1 monoclonal antibody group (46 cases) did not reach, while the median RFS in the IFN/OBS group (64 cases) was 36 months. The 1-year RFS rates were 85.3% and 92.1% and the 2-year RFS rates were 71.9% and 63.7% in the PD-1 monoclonal antibody group and the IFN/OBS group, respectively, with no statistically significant difference (P=0.394). Among stage Ⅲ patients, the median RFS rates in the PD-1 monoclonal antibody group (118 cases) and the IFN/OBS group (68 cases) were 23 and 13 months, respectively. The 1-year RFS rates were 70.0% and 51.8% and the 2-year RFS rates were 51.8% and 35.1%in the PD-1 monoclonal antibody group and the IFN/OBS group, respectively, with a statistically significant difference (P=0.010). Stratified analysis showed that the advantage of PD-1 monoclonal antibody adjuvant therapy in improving RFS persisted in the subgroups of primary ulceration (HR=0.558, 95% CI: 0.348-0.893), lymph node macroscopic metastasis (HR=0.486, 95% CI: 0.285-0.828), stage ⅢC (HR=0.389, 95% CI: 0.24-0.63), and the subgroup without BRAF/c-Kit/NRAS gene mutations (HR=0.347, 95% CI: 0.171-0.706). In terms of recurrence patterns, in stage Ⅱ patients, the recurrence and metastasis rate was 15.2% (7/46) in the PD-1 monoclonal antibody group, significantly lower than the IFN/OBS group [43.8% (28/64), P=0.002]. In stage Ⅲ melanoma patients, the recurrence and metastasis rate was 42.4% (50/118) in the PD-1 monoclonal antibody group, also lower than the IFN/OBS group [63.2% (43/68), P=0.006]. Conclusions: In real-world settings, compared with patients receiving low-dose IFN adjuvant therapy or observational follow-up, PD-1 monoclonal antibody immunotherapy can reduce the recurrence and metastasis rate of cutaneous and limb melanoma, and prolong the postoperative RFS of stage Ⅲ cutaneous and limb melanoma patients. Patients with a heavier tumor burden benefit more from immunotherapy.
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Affiliation(s)
- Z G Ren
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - Y Xu
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Z Z Hua
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - Z Y Mo
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - L W Wang
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - G B Shi
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - W L Liu
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - W Sun
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - B Q Zheng
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - C M Wang
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
| | - Y J Jin
- Department of Orthopedics, Shanghai Electric Power Hospital, Shanghai 200050, China
| | - Y Chen
- Department of Musculoskeletal Oncology, Fudan University Shanghai Cancer Center, Shanghai 200032, China
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Jin YJ, Si BM, Kim E, Lee J, Kim H, Kwak G, Sakaguchi T, Lee J, Song IY, Lee CL, Kim JH, Heo K, Lee WE. Reusable, Ultrasensitive, Patterned Conjugated Polyelectrolyte-Surfactant Complex Film with a Wide Detection Range for Copper Ion Detection. ACS Appl Mater Interfaces 2023; 15:12339-12349. [PMID: 36847579 DOI: 10.1021/acsami.2c21388] [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] [Indexed: 06/18/2023]
Abstract
Conjugated polyelectrolytes (CPEs) are emerging as promising materials in the sensor field because they enable high-sensitivity detection of various substances in aqueous media. However, most CPE-based sensors have serious problems in real-world application because the sensor system is operated only when the CPE is dissolved in aqueous media. Here, the fabrication and performance of a water-swellable (WS) CPE-based sensor driven in the solid state are demonstrated. The WS CPE films are prepared by immersing a water-soluble CPE film in cationic surfactants of different alkyl chain lengths in a chloroform solution. The prepared film exhibits rapid, limited water swellability despite the absence of chemical crosslinking. The water swellability of the film enables the highly sensitive and selective detection of Cu2+ in water. The fluorescence quenching constant and the detection limit of the film are 7.24 × 106 L mol-1 and 4.38 nM (0.278 ppb), respectively. Moreover, the film is reusable via a facile treatment. Furthermore, various fluorescent patterns introduced by different surfactants are successfully fabricated by a simple stamping method. By integrating the patterns, Cu2+ detection in a wide concentration range (nM-mM) can be achieved.
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Affiliation(s)
- Young-Jae Jin
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, South Korea
| | - Beom-Min Si
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, South Korea
| | - Eonji Kim
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, South Korea
| | - Jineun Lee
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 41566, South Korea
| | - Heesang Kim
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 41566, South Korea
| | - Giseop Kwak
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 41566, South Korea
| | - Toshikazu Sakaguchi
- Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui, Bunkyo 3-9-1, Fukui 910-8507, Japan
| | - Jinhee Lee
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, South Korea
| | - In Young Song
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, South Korea
| | - Chang-Lyoul Lee
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 61005, South Korea
| | - Joon Heon Kim
- Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, 1 Oryong-dong, Buk-gu, Gwangju 61005, South Korea
| | - Kyuyoung Heo
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, South Korea
| | - Wang-Eun Lee
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, South Korea
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Zhang ZW, Jin YJ, Zhao SJ, Zhou LN, Huang Y, Wang JW, Tang W, Wu N. [Prevalence and risk factors of coronary artery calcification on lung cancer screening with low-dose CT]. Zhonghua Zhong Liu Za Zhi 2022; 44:1112-1118. [PMID: 36319457 DOI: 10.3760/cma.j.cn112152-20201114-00986] [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: 06/16/2023]
Abstract
Objective: To investigate the prevalence and risk factors of coronary artery calcification (CAC) on lung cancer screening with low-dose computed tomography (LDCT). Methods: A total of 4 989 asymptomatic subjects (2 542 males and 2 447 females) who underwent LDCT lung cancer screening were recruited at Cancer Hospital, Chinese Academy of Medical Sciences from 2014 to 2017. The visual scoring method was used to assess coronary artery calcification score. χ(2) test or independent t-test was used to compare the difference of CAC positive rate among different groups. Multivariate logistic regression was used to analyze risk factors associated with CAC in the study. Results: Of the 4 989 asymptomatic subjects, CAC occurred in 1 018 cases. The positive rate was 20.4%, of which mild, moderate and severe calcification accounted for 86.3%, 11.4% and 2.3%, respectively. Gender, age, BMI, education level, occupation, smoking history, diabetes, hypertension and hyperlipidemia had statistically significant differences in CAC positive rates among groups. Multivariate logistic regression analysis showed that gender, age, diabetes, hypertension, hyperlipidemia and smoking history were risk factors for CAC. Age, diabetes, hypertension and smoking history were statistically significant risk factors between the mild and moderate CAC group. A total of 1 730 coronary arteries in 1 018 CAC positive cases had calcification, CAC positive rate of left anterior descending was the highest(51.3%); 568 cases (55.8%) were single vessel calcification, 450 cases (44.2%) were multiple vessel calcification. Conclusions: LDCT can be used for the 'one-stop' early detection of lung cancer and coronary atherosclerosis. Gender, age, diabetes, hypertension, hyperlipidemia and smoking are related risk factors for coronary atherosclerosis.
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Affiliation(s)
- Z W Zhang
- Department of Nuclear Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021 China
| | - Y J Jin
- Department of Nuclear Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021 China
| | - S J Zhao
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L N Zhou
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y Huang
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J W Wang
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - W Tang
- Department of Diagnostic Radiology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - N Wu
- Department of Nuclear Medicine, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021 China
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Gong YF, Luo ZW, Feng JX, Xue JB, Guo ZY, Jin YJ, Yu Q, Xia S, Lü S, Xu J, Li SZ. [Prediction of trends for fine-scale spread of Oncomelania hupensis in Shanghai Municipality based on supervised machine learning models]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2022; 34:241-251. [PMID: 35896487 DOI: 10.16250/j.32.1374.2021247] [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: 06/15/2023]
Abstract
OBJECTIVE To predict the trends for fine-scale spread of Oncomelania hupensis based on supervised machine learning models in Shanghai Municipality, so as to provide insights into precision O. hupensis snail control. METHODS Based on 2016 O. hupensis snail survey data in Shanghai Municipality and climatic, geographical, vegetation and socioeconomic data relating to O. hupensis snail distribution, seven supervised machine learning models were created to predict the risk of snail spread in Shanghai, including decision tree, random forest, generalized boosted model, support vector machine, naive Bayes, k-nearest neighbor and C5.0. The performance of seven models for predicting snail spread was evaluated with the area under the receiver operating characteristic curve (AUC), F1-score and accuracy, and optimal models were selected to identify the environmental variables affecting snail spread and predict the areas at risk of snail spread in Shanghai Municipality. RESULTS Seven supervised machine learning models were successfully created to predict the risk of snail spread in Shanghai Municipality, and random forest (AUC = 0.901, F1-score = 0.840, ACC = 0.797) and generalized boosted model (AUC= 0.889, F1-score = 0.869, ACC = 0.835) showed higher predictive performance than other models. Random forest analysis showed that the three most important climatic variables contributing to snail spread in Shanghai included aridity (11.87%), ≥ 0 °C annual accumulated temperature (10.19%), moisture index (10.18%) and average annual precipitation (9.86%), the two most important vegetation variables included the vegetation index of the first quarter (8.30%) and vegetation index of the second quarter (7.69%). Snails were more likely to spread at aridity of < 0.87, ≥ 0 °C annual accumulated temperature of 5 550 to 5 675 °C, moisture index of > 39% and average annual precipitation of > 1 180 mm, and with the vegetation index of the first quarter of > 0.4 and the vegetation index of the first quarter of > 0.6. According to the water resource developments and township administrative maps, the areas at risk of snail spread were mainly predicted in 10 townships/subdistricts, covering the Xipian, Dongpian and Tainan sections of southern Shanghai. CONCLUSIONS Supervised machine learning models are effective to predict the risk of fine-scale O. hupensis snail spread and identify the environmental determinants relating to snail spread. The areas at risk of O. hupensis snail spread are mainly located in southwestern Songjiang District, northwestern Jinshan District and southeastern Qingpu District of Shanghai Municipality.
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Affiliation(s)
- Y F Gong
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Z W Luo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J X Feng
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J B Xue
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Z Y Guo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Y J Jin
- Shanghai Municipal Center for Disease Control and Prevention, China
| | - Q Yu
- Shanghai Municipal Center for Disease Control and Prevention, China
| | - S Xia
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - S Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
| | - J Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - S Z Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), National Health Commission Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
- School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China
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Jin YJ, Kim H, Jang WD, Park SJ, Kwak G. Spontaneously sp 2-Carbonized Fluorescent Polyamides as a Probe Material for Bioimaging. ACS Appl Bio Mater 2022; 5:3057-3066. [PMID: 35533679 DOI: 10.1021/acsabm.2c00337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Spontaneously sp2-carbonized polyamides (PA1, PA2) were prepared via Knoevenagel-type side reactions of malonyl moieties under mild conditions in the polycondensation of dicarbonyl chloride and diamine. Both polymers were soluble in water and emissive in the visible region, and the fluorescence (FL) intensity and the maximum wavelength were highly dependent on the excitation wavelength and the pH. Their chemical structures and FL origin were clarified by performing various spectroscopic analyses. π*-π transition was assumed to be allowed in an enol form based on the conjugated structure formed by the side reaction; this was responsible for its pH dependency and high FL quantum efficiency. In particular, PA2, which comprises the tertiary amide linkage, showed quick endocytosis, low cytotoxicity, excellent biocompatibility, and exclusively stained lysosomes with the lowest intracellular pH. These results will help in understanding the origin of the FL emission of carbonized nanomaterials and exploring more advanced functions in the field of bioimaging.
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Affiliation(s)
- Young-Jae Jin
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea.,Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 305-600, Korea
| | - Hyojin Kim
- Daegu Technopark Nano Convergence Practical Application Center, 891-5 Daecheon-dong, Dalseo-ku, Daegu 704-801, Korea
| | - Woo-Dong Jang
- Department of Chemistry, Yonsei University, 50 Yonsei-ro, Seodaemoon-Gu, Seoul 03722, Republic of Korea
| | - Sang-Joon Park
- College of Veterinary Medicine, Kyungpook National University, 1370 Sankyuk-dong, Buk-gu, Daegu, 702-701 Korea
| | - Giseop Kwak
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Yu Q, Pan H, Jiang L, Zhu M, Jin YJ, Wang ZY. [Potential transmission risk of key parasitic diseases and responses to the risk during the construction of an ecological city in Shanghai Municipality]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2022; 34:531-536. [PMID: 36464251 DOI: 10.16250/j.32.1374.2021217] [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: 06/17/2023]
Abstract
A blueprint on Shanghai's ecological space design between 2021 and 2035 was released in 2021, aiming to build an ecological city and improve the development of ecological civilization. The transmission of parasitic diseases is strongly associated with climate and ecological environments. Currently, the prevalence of parasitic diseases has been maintained at extremely low-transmission levels, and there are almost no local cases; however, the alteration of ecological environments may results in a potential transmission risk of parasitic diseases. Hereby, the current status of key parasitic diseases in Shanghai Municipality was described, and the potential transmission risk of parasitic diseases and responses to this risk were analyzed during the construction of an ecological city in Shanghai Municipality. In addition, the suggestions pertaining to surveillance and management of parasitic diseases were proposed during the mid- and long-term construction of an ecological city in Shanghai Municipality.
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Affiliation(s)
- Q Yu
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
- Co-first authors
| | - H Pan
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
- Co-first authors
| | - L Jiang
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
| | - M Zhu
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
| | - Y J Jin
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
| | - Z Y Wang
- Shanghai Center for Disease Control and Prevention, Shanghai Institutes of Prevention Medicine, Shanghai 200336, China
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Dai SM, Yu Q, Ma XJ, Wang ZY, Zhang YG, Zhu M, Zhang CG, Zhu Q, Jiang L, Jin YJ, Pan H, Wu HY. [Prevalence of Clonorchis sinensis infections in freshwater fish in mainland China: A meta-analysis]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 34:16-27. [PMID: 35266353 DOI: 10.16250/j.32.1374.2021230] [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: 06/14/2023]
Abstract
OBJECTIVE To understand the real prevalence of Clonorchis sinensis infections in the freshwater fish in mainland China, so as to provide insights into clonorchiasis control and detection of freshwater fish. METHODS All literatures reporting the prevalence of C. sinensis infections in the freshwater fish, the second intermediate host of the parasite, were jointly retrieved in Chinese and English electronic databases from January 1, 2010 to December 31, 2020, including Wanfang Data, CNKI, PubMed, Web of Science, Embase and Cochrane Library. All studies were screened based on inclusion and exclusion criteria, and the quality of all enrolled literatures was evaluated. The pooled prevalence of C. sinensis infections in freshwater fish and its 95% confidence interval (CI) were estimated using the software Stata version 15.0, and subgroup analyses were performed to investigate the region-, season- and sample source-specific pooled prevalence of C. sinensis infections in freshwater fish. In addition, the sensitivity and publication bias of all included studies were analyzed. RESULTS A total of 40 eligible literatures were included in this study, including 37 Chinese literatures and 3 English literatures, and there were 10 high-quality literatures, 27 moderate-quality literatures and 3 low-quality literatures. A total of 53 species containing 37 959 freshwater fish were reported in these 40 studies, and 73.58% (39/53) of freshwater fish species were identified with C. sinensis infections. Meta-analysis showed 23.5% [95% CI: (0.19, 0.28)] pooled prevalence of C. sinensis infections in freshwater fish in mainland China, and subgroup analyses higher prevalence of C. sinensis infections in freshwater fish in northeastern China [35.7%, 95% CI: (0.22, 0.50)] than in central [25.9%, 95% CI: (0.04, 0.48)] and southern China [20.6%, 95% CI: (0.09, 0.32)], higher prevalence of C. sinensis infections in freshwater fish sampled in spring [44.1%, 95% CI: (0.35, 0.53)] than in autumn [6.7%, 95% CI: (0.05, 0.08)] and summer [3.3%, 95% CI: (-0.01, 0.07)], and higher prevalence of C. sinensis infections in freshwater fish sampled from natural water [25.2%, 95% CI: (0.17, 0.33)] than from retail trades [22.2%, 95% CI: (0.17, 0.28)] and breeding chain [12.3%, 95% CI: (0.03, 0.22)]. However, all included studies had a publication bias with a low sensitivity. CONCLUSIONS The prevalence of C. sinensis infections is high in freshwater fish in mainland China, and there are still challenges for clonorchiasis control. Reinforcement of health education, diagnostics development and food safety supervision is recommended in future clonorchiasis control programs.
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Affiliation(s)
- S M Dai
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Q Yu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - X J Ma
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Z Y Wang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Y G Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - M Zhu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - C G Zhang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Q Zhu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - L Jiang
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - Y J Jin
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - H Pan
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
| | - H Y Wu
- Shanghai Municipal Center for Disease Control and Prevention, Shanghai 200025, China
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Jin YJ, Kim H, Lee J, Kim H, Aoki T, Kwak G. Optical-Dissymmetry Phase Transitions in an Achiral Helical-Spring Polymer through Controlled Noncovalent Interactions. J Phys Chem B 2021; 125:8251-8260. [PMID: 34259532 DOI: 10.1021/acs.jpcb.1c05345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Noncovalent chemistry may offer diversity in the functions and applications for artificial polymers by allowing various ordered-disordered phase transitions in a precisely controlled manner. To verify this notion from a fundamental perspective, we examined an achiral poly(phenylacetylene) derivative with an α-helical structure as a helical-spring polymer for revealing phase changes through control of intramolecular hydrogen bonding with the chiral solvent and temperature. When an amine capable of hydrogen bonding was used as the chiral solvent, either an irreversible helix-helix or a reversible helix-coil phase change occurred in an optically dissymmetric manner according to the amount of the chiral solvent added and ambient temperature. Considering the hydrogen-bonding strength values of the solvent mixture and the thermodynamic parameters, we could predict if the optical-dissymmetry phase changes would occur and, if so, how they occur. Our results were similar to those see for the denaturation of proteins, induced by solvent and temperature, based on helix-coil phase transition.
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Affiliation(s)
- Young-Jae Jin
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea.,Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 305-600, Korea
| | - Hyojin Kim
- Daegu Technopark Nano Convergence Practical Application Center, 891-5 Daecheon-dong, Dalseo-ku, Daegu 704-801, Korea
| | - Jineun Lee
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Heesang Kim
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Toshiki Aoki
- Department of Chemistry and Chemical Engineering, Graduate School of Science and Technology, and Center for Transdisciplinary Research, Niigata University, Ikarashi 2-8050, Nishi-ku, Niigata 950-2181, Japan
| | - Giseop Kwak
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Chen ZJ, Wang R, Xia BW, Zheng BB, Jin YJ, Zhao YJ, Xu H. Three-Dimensional Dirac Phonons with Inversion Symmetry. Phys Rev Lett 2021; 126:185301. [PMID: 34018763 DOI: 10.1103/physrevlett.126.185301] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 05/23/2020] [Accepted: 04/05/2021] [Indexed: 06/12/2023]
Abstract
Dirac semimetals associated with bulk Dirac fermions are well known in topological electronic systems. In sharp contrast, three-dimensional (3D) Dirac phonons in crystalline solids are still unavailable. Here we perform symmetry arguments and first-principles calculations to systematically investigate 3D Dirac phonons in all space groups with inversion symmetry. The results show that there are two categories of 3D Dirac phonons depending on their protection mechanisms and positions in momentum space. The first category originates from the four-dimensional irreducible representations at the high symmetry points. The second category arises from the phonon branch inversion, and the symmetry guarantees Dirac points to be located along the high symmetry lines. Furthermore, we reveal that nonsymmorphic symmetries and the combination of inversion and time-reversal symmetries play essential roles in the emergence of 3D Dirac phonons. Our work not only offers a comprehensive understanding of 3D Dirac phonons but also provides significant guidance for exploring Dirac bosons in both phononic and photonic systems.
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Affiliation(s)
- Z J Chen
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - R Wang
- Institute for Structure and Function and Department of Physics and Center for Quantum Materials and Devices, Chongqing University, Chongqing 400044, People's Republic of China
| | - B W Xia
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - B B Zheng
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Y J Jin
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Yu-Jun Zhao
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - H Xu
- Department of Physics and Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Guangdong Provincial Key Laboratory of Computational Science and Material Design, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
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Lü S, Lü C, Li YL, Xu J, Hong QB, Zhou J, Zhang JF, Wen LY, Zhang JF, Zhang SQ, Lin DD, Liu JB, Ren GH, Dong Y, Liu Y, Yang K, Jiang ZH, Deng ZH, Jin YJ, Xie HG, Zhou YB, Wang TP, Liu YW, Zhu HQ, Cao CL, Li SZ, Zhou XN. [Expert consensus on the strategy and measures to interrupt the transmission of schistosomiasis in China]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:10-14. [PMID: 33660468 DOI: 10.16250/j.32.1374.2021007] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Since 2015 when the transmission of schistosomiasis was controlled in China, the country has been moving towards elimination of schistosomiasis, with the surveillance-response as the main interventions for schistosomiasis control. During the period of the 13th Five-Year Plan, the transmission of schistosomiasis had been interrupted in four provinces of Sichuan, Jiangsu, Yunnan and Hubei and the prevalence of schistosomiasis has been at the historically lowest level in China. As a consequence, the goal set in The 13th Five-Year National Schistosomiasis Control Program in China is almost achieved. However, there are multiple challenges during the stage moving towards elimination of schistosomiasis in China, including the widespread distribution of intermediate host snails and complicated snail habitats, many types of sources of Schistosoma japonicum infections and difficulty in management of bovines and sheep, unmet requirements for the current schistosomiasis control program with the currently available tools, and vulnerable control achievements. During the 14th Five-Year period, it is crucial to consolidate the schistosomiasis control achievements and gradually solve the above difficulties, and critical to provide the basis for achieving the ultimate goal of elimination of schistosomiasis in China. Based on the past experiences from the national schistosomiasis control program and the challenges for schistosomiasis elimination in China, an expert consensus has been reached pertaining to the objectives, control strategy and measures for The 14th Five-Year National Schistosomiasis Control Program in China, so as to provide insights in to the development of The 14th Five-Year National Schistosomiasis Control Program in China.
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Affiliation(s)
- S Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - C Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - Y L Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - J Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - Q B Hong
- Jiangsu Institute of Parasitic Diseases, China
| | - J Zhou
- Hunan Provincial Institute of Schistosomiasis Control, China
| | - J F Zhang
- Jiangsu Institute of Parasitic Diseases, China
| | - L Y Wen
- Zhejiang Provincial Center for Schistosomiasis Control, China
| | - J F Zhang
- Zhejiang Provincial Center for Schistosomiasis Control, China
| | - S Q Zhang
- Anhui Provincial Institute of Schistosomiasis Control, China
| | - D D Lin
- Jiangxi Provincial Institute of Parasitic Disease Control, China
| | - J B Liu
- Hubei Provincial Center for Disease Control and Prevention, China
| | - G H Ren
- Hunan Provincial Institute of Schistosomiasis Control, China
| | - Y Dong
- Yunnan Institute of Endemic Disease Control and Prevention, China
| | - Y Liu
- Sichuan Provincial Center for Disease Control and Prevention, China
| | - K Yang
- Jiangsu Institute of Parasitic Diseases, China
| | - Z H Jiang
- Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, China
| | - Z H Deng
- Guangdong Provincial Center for Disease Control and Prevention, China
| | - Y J Jin
- Shanghai Municipal Center for Disease control and Prevention, China
| | - H G Xie
- Fujian Provincial Center for Disease Control and Prevention, China
| | - Y B Zhou
- School of Public Health, Fudan University, China
| | - T P Wang
- Anhui Provincial Institute of Schistosomiasis Control, China
| | - Y W Liu
- Jiangxi Provincial Institute of Parasitic Disease Control, China
| | - H Q Zhu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - C L Cao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - S Z Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
| | - X N Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
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Jin YJ, Park H, Moon BC, Kim JH, Lee WE, Lee CL, Kwak G. Unusual piezochromic fluorescence of a distyrylpyrazine derivative crystals: phase transition through [2 + 2] photocycloaddition under UV irradiation. Sci Rep 2021; 11:2762. [PMID: 33531511 PMCID: PMC7854636 DOI: 10.1038/s41598-021-81562-4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 01/05/2021] [Indexed: 11/09/2022] Open
Abstract
The piezochromic fluorescence (FL) of a distyrylpyrazine derivative, 2,3-diisocyano-5,6-distyrylpyrazine (DSP), was investigated in this study. Depending on the recrystallization method, DSP afforded two different crystals with green and orange FL emission. The orange color FL emission crystal (O-form) was easily converted to the green color FL emission one (G-form) by manual grinding. The G-form was also converted to a slightly different orange color FL emission crystal (RO-form) by a weak UV irradiation. When the RO-form was ground again, the G-form was regenerated. The FL colors changed between the G- and RO-forms over several ten times by repeated mechanical grinding and UV irradiation. The FL, UV-visible, 1H-NMR and XRD results showed that the O (or RO)-to-G transformation induced by mechanical stress results from the change of degree of molecular stacking from dense molecular stacking structure to relatively loose molecular stacking structure, whereas the G-to-RO reconversion by UV irradiation results from return to dense molecular stacking structure again due to lattice movement (lattice slipping) allowed by photocycloaddition in solid-state.
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Affiliation(s)
- Young-Jae Jin
- Department of Polymer Science and Engineering, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu, 702-701, Korea
| | - Hyosang Park
- Department of Polymer Science and Engineering, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu, 702-701, Korea
| | - Byung-Chun Moon
- Department of Polymer Science and Engineering, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu, 702-701, Korea
| | - Jae Hong Kim
- School of Chemical Engineering and Technology, Yeungnam University, 214-1 Dae-dong, Gyeongsan, 712-749, Gyeongbuk, Korea.
| | - Wang-Eun Lee
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon, 305-600, Korea
| | - Chang-Lyoul Lee
- Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju, Korea.
| | - Giseop Kwak
- Department of Polymer Science and Engineering, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu, 702-701, Korea.
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Jin YJ, Zheng BB, Xiao XL, Chen ZJ, Xu Y, Xu H. Two-Dimensional Dirac Semimetals without Inversion Symmetry. Phys Rev Lett 2020; 125:116402. [PMID: 32976001 DOI: 10.1103/physrevlett.125.116402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 08/19/2020] [Indexed: 06/11/2023]
Abstract
Realizing stable two-dimensional (2D) Dirac points against spin-orbit coupling (SOC) has attracted much attention because it provides a platform to study the unique transport properties. In previous work, Young and Kane [Phys. Rev. Lett. 115, 126803 (2015)PRLTAO0031-900710.1103/PhysRevLett.115.126803 proposed stable 2D Dirac points with SOC, in which the Berry curvature and edge states vanish due to the coexistence of inversion and time-reversal symmetries. Herein, using the tight-binding model and k·p effective Hamiltonian, we present that 2D Dirac points can survive in the presence of SOC without inversion symmetry. Such 2D Dirac semimetals possess nonzero Berry curvature near the crossing nodes, and two edge states are terminated at one pair of Dirac points. In addition, according to symmetry arguments and high-throughput first-principles calculations, we identify a family of ideal 2D Dirac semimetals, which has nonzero Berry curvature in the vicinity of Dirac points and visible edge states, thus facilitating the experimental observations. Our work shows that 2D Dirac points can emerge without inversion symmetry, which not only enriches the classification of 2D topological semimetals but also provides a promising avenue to observe exotic transport phenomena beyond graphene, e.g., nonlinear Hall effect.
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Affiliation(s)
- Y J Jin
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, The University of Hong Kong, Pokfulam Road, Hong Kong, People's Republic of China
| | - B B Zheng
- College of Physics and Optoelectronic Technology & Advanced Titanium Alloys and Functional Coatings Cooperative Innovation Center, Baoji University of Arts and Sciences, Baoji 721016, People's Republic of China
| | - X L Xiao
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, Chongqing University, Chongqing 400044, People's Republic of China
| | - Z J Chen
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - Y Xu
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - H Xu
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
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Xia BW, Jin YJ, Zhao JZ, Chen ZJ, Zheng BB, Zhao YJ, Wang R, Xu H. Robust Twin Pairs of Weyl Fermions in Ferromagnetic Oxides. Phys Rev Lett 2019; 122:057205. [PMID: 30822035 DOI: 10.1103/physrevlett.122.057205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Indexed: 05/05/2023]
Abstract
The ferromagnetic Weyl semimetals with inversion symmetry usually possess odd pairs of Weyl fermions. Here, we present an inversion eigenvalue argument to dictate the existence of even pairs of ferromagnetic Weyl fermions. We show, by a combination of first-principles calculations and symmetry analyses, that this exotic topological feature can be verified in ferromagnetic oxides in different space groups. In particular, a realistic candidate, i.e., hollandite RbCr_{4}O_{8} with a high Curie temperature (∼295 K), hosts intriguing twin pairs of Weyl fermions, which are robustly stable against perturbations. Moreover, our effective model and symmetry analysis show that the twin pairs of Weyl fermions originate from a mirrored nodal ring pair. The nontrivial surface states and Fermi arcs of RbCr_{4}O_{8} are clearly visible, further revealing the topological features. This work strengthens the understanding of the parity analysis in exploring ferromagnetic topological materials with unconventional fermionic excitations.
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Affiliation(s)
- B W Xia
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Y J Jin
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - J Z Zhao
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Z J Chen
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - B B Zheng
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
| | - Y J Zhao
- Department of Physics, South China University of Technology, Guangzhou 510640, People's Republic of China
| | - R Wang
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
- Institute for Structure and Function & Department of physics, Chongqing University, Chongqing 400044, People's Republic of China
| | - H Xu
- Department of Physics & Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China
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15
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Shi Z, Kwak G, Jin YJ, Teraguchi M, Aoki T, Kaneko T. Solvent-tuned dual emission of a helical poly[3,5-bis(hydroxymethyl)phenylacetylene] connected with a π-conjugated chromophore. Polym J 2018. [DOI: 10.1038/s41428-018-0045-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jin YJ, Araki D, Teraguchi M, Aoki T, Kwak G. Dimesitylboryl-containing polydiphenylacetylene with a large Stokes shift, high fluorescence efficiency, and fluoride ion sensing ability. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Sun Q, Huang Y, Zhao SJ, Zhang L, Tang W, Jin YJ, Wu N. [The volume and mass growth of persisted pulmonary nodules detected in low-dose CT screening and its influence factors]. Zhonghua Zhong Liu Za Zhi 2018; 40:274-279. [PMID: 29730914 DOI: 10.3760/cma.j.issn.0253-3766.2018.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the changes of volume and mass of pulmonary nodules which were detected in low-dose computed tomography (LDCT) screening, and to analyze the influencing factors. Methods: This retrospective study analyzed the CT images of the participants who underwent at least two chest LDCT scanning from March 2009 to December 2015 in National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College. The inclusion criteria was the nodule diameter ≥6 mm; the volume growth was defined as ≥20%. Fifty-one pulmonary nodules (PNs) were selected among 51 enrolled participants (26 men and 25 women). According to characteristic of nodule and risk stratification of participant, the nodules were classified into different groups (10 non-solid nodules, 17 part-solid nodules and 24 solid nodules; 14 PNs in high-risk group, 12 PNs in moderate-risk group and 25 PNs in low-risk group). The Lung-VCAR software was used to measure the diameter and volume of the PNs, and all nodules were calculated for the volume doubling time (VDT) and mass doubling time (MDT). Results: Among the 51 PNs, the diameter of 33 nodules increased more than 1.5 mm while 18 nodules increased less than 1.5 mm. The median VDT of part-solid nodules was 364 days, which was shorter than that of non-solid nodules and solid nodules (761 and 819 days, respectively), the differences were statistically significant (both P<0.05). The median MDT of part-solid nodules was 351 days, which was lower than that of non-solid nodules and solid nodules (772 days and 840 days, respectively). The difference was statistically significant (P<0.05). The median VDT and MDT of the pulmonary nodules in the high-risk group were 181 days and 256 days, respectively, which were lower than those in the low risk group (1 037 days and 1 035 days, respectively). VDT has good correlation with MDT (r=0.909, P<0.001). Conclusions: Both the characteristic of PNs and the risk status of the participants could affect the growth of nodules in LDCT screening. The part-solid nodules and high-risk group nodules grew relatively faster, which should be closely focused on. Compared with the two-dimensional diameter, the three-dimensional quantitative indicators (VDT and MDT) were more sensitive for nodule growth. The mass changes of part-solid nodules were earlier than that of volume.
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Affiliation(s)
- Q Sun
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y Huang
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S J Zhao
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - L Zhang
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - W Tang
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y J Jin
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - N Wu
- Department of Diagnostic Radiology, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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Seo KU, Jin YJ, Kim H, Sakaguchi T, Kwak G. Kinetic Study on Achiral-to-Chiral Transformation of Achiral Poly(diphenylacetylene)s via Thermal Annealing in Chiral Solvent: Molecular Design Guideline for Conformational Change toward Optically Dissymmetric Structures. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b02328] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kyo-Un Seo
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Young-Jae Jin
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Hyojin Kim
- Daegu Technopark
Nano Convergence Practical Application Center, 891-5 Daecheon-dong, Dalseo-ku, Daegu 704-801, Korea
| | - Toshikazu Sakaguchi
- Department
of Materials Science and Engineering, Graduate School of Engineering, University of Fukui, Bunkyo 3-9-1, Fukui 910-8507, Japan
| | - Giseop Kwak
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Jin YJ, Kwak G. Unusual, Highly Efficient Fluorescence Emission Enhancement of Conjugated Polymers with an Intramolecular Stack Structure through Thermal Annealing at High Temperature. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b02338] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Young-Jae Jin
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Giseop Kwak
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Jin YJ, Park H, Ohk YJ, Kwak G. Hydrodynamic fluorescence emission behavior of molecular rotor-based vinyl polymers used as viscosity sensors. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Chen JB, Zhang J, Hu HZ, Xue M, Jin YJ. Polymorphisms of TGFB1, TLE4 and MUC22 are associated with childhood asthma in Chinese population. Allergol Immunopathol (Madr) 2017; 45:432-438. [PMID: 28262390 DOI: 10.1016/j.aller.2016.10.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 10/31/2016] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To investigate whether the genetic variants of TGFB1, TLE4, MUC22 and IKZF3 are associated with the development of asthma in Chinese children. METHODS 572 adolescent asthma patients and 590 age-matched healthy controls were included in this study. A total of four SNPs were genotyped, including rs2241715 of TGFB1, rs2378383 of TLE4, rs2523924 of MUC22, and rs907092 of IKZF3. Allele frequencies of the patients and the control group were compared by the Chi-square test. The Student t test was used to analyse the relationship between genotypes and clinical feature of the patients. RESULTS Patients were found to have significantly different frequencies of allele A of rs2241715, allele G of rs2378383 and allele A of rs2523924 as compared with the controls (40.4% vs. 45.9%, p=0.01 for rs2241715; 17.2% vs. 13.4%, p=0.01 for rs2378383; 15.3% vs. 11.9%, p=0.02 for rs2523924). For patients with severe asthma, those with genotype AA/AG of rs2241715 had remarkably higher FEV1% as compared with those with genotype GG (59.1±4.3% vs. 55.4±3.7%, p<0.001). Moreover, those with genotype GG/GA of rs2378383 had remarkably lower FEV1% as compared with those with genotype AA (54.6±2.9% vs. 58.6±4.1%, p<0.001). CONCLUSIONS Genes TGFB1, TLE4 and MUC22 are associated with the risk of childhood asthma in Chinese population. Our results associating TGFB1 and TLE4 with clinical features of asthma suggest potential application of these parameters in the management of asthma children.
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Affiliation(s)
- J B Chen
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - J Zhang
- Department of Gastroenterology, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - H Z Hu
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - M Xue
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China
| | - Y J Jin
- Department of Paediatrics, Jiangsu Taizhou People's Hospital, Taizhou, China.
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Hur EY, Jin YJ, Jin TX, Lee SM. Development and evaluation of the automated risk assessment system for multidrug-resistant organisms (autoRAS-MDRO). J Hosp Infect 2017; 98:202-211. [PMID: 28807836 DOI: 10.1016/j.jhin.2017.08.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 08/06/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND A high proportion of infections acquired in hospitals are caused by multidrug-resistant organisms (MDROs). The priority in MDRO prevention is to detect high-risk patients and implement preventive intervention as soon as possible. AIM To develop an automated risk assessment system for MDROs (autoRAS-MDRO) to screen for patients at MDRO infection risk and evaluate the predictive validity of the autoRAS-MDRO. METHODS Data for 4200 variables were extracted from the electronic health records (EHRs) for constructing the MDRO risk-scoring algorithm, which was based on a logistic regression model. The autoRAS-MDRO was designed such that the MDRO risk classification (high, moderate, low risk) could be automatically displayed on the nursing Kardex screen in the EHRs system. For the development of the MDRO risk-scoring algorithm, 1000 patients with MDROs and 4000 patients without MDROs were selected; similarly, for the evaluation, 2173 and 8692 patients with and without MDROs, respectively, were selected. FINDINGS The predictive validity of the autoRAS-MDRO was as follows: (i) at the 6-month evaluation: sensitivity, 81%; specificity, 79%; positive predictive value (PPV), 49%; negative predictive value (NPV), 94%; and Youden index, 0.60; (ii) at the 12-month evaluation: sensitivity 79%, specificity 78%, PPV 47%, NPV 94%, and Youden index, 0.57. CONCLUSION The autoRAS-MDRO had moderate predictive validity. It could be useful in redirecting nurses' time and efforts required for MDRO risk assessment and implementation of infection control measures, and in reducing the incidence of MDRO infection in hospitals, thereby contributing to patient safety.
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Affiliation(s)
- E Y Hur
- College of Nursing, The Catholic University of Korea, Seoul, South Korea
| | - Y J Jin
- College of Nursing, The Catholic University of Korea, Seoul, South Korea
| | - T X Jin
- College of Nursing, The Catholic University of Korea, Seoul, South Korea
| | - S M Lee
- College of Nursing, The Catholic University of Korea, Seoul, South Korea.
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Jin YJ, Seo KU, Choi YG, Teraguchi M, Aoki T, Kwak G. Annealing-Induced Circular Dichroism Enhancement in Luminescent Conjugated Polymers with an Intramolecular Stack Structure. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01283] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Young-Jae Jin
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Kyo-Un Seo
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Young-Ghil Choi
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Masahiro Teraguchi
- Department
of Chemistry and Chemical Engineering, Graduate School of Science
and Technology, and Center for Transdisciplinary Research, Niigata University, Ikarashi
2-8050, Nishi-ku, Niigata 950-2181, Japan
| | - Toshiki Aoki
- Department
of Chemistry and Chemical Engineering, Graduate School of Science
and Technology, and Center for Transdisciplinary Research, Niigata University, Ikarashi
2-8050, Nishi-ku, Niigata 950-2181, Japan
| | - Giseop Kwak
- Department of Polymer Science & Engineering, Polymeric Nanomaterials Laboratory, School of Applied Chemical Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Jin YJ, Kawamura Y, Teraguchi M, Aoki T, Kwak G. Thermodynamically stable, highly emissive poly(diphenylacetylene) derivative containing long alkyl side chain without silylene linkage. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.07.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Jin YJ, Sun L, Yang L, Xing R, Liu XY. [Significance of v-raf murine sarcoma viral oncogene homologue B1 in rheumatoid arthritis]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:947-950. [PMID: 27987495] [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 detect serum v-raf murine sarcoma viral oncogene homologue B1 (BRAF) protein levels and to investigate their clinical significance in rheumatoid arthritis (RA) patients. METHODS Serum samples were obtained from 78 RA patients, 32 osteoarthritis (OA) patients, 16 systemic lupus erythematosus (SLE) patients, 16 gout patients, 16 ankylosing spondylitis (AS) patients, 16 Sjogren syndrome (SS) patients and 30 healthy controls. BRAF protein in the sera was examined by enzyme-linked immunosorbent assay (ELISA). The associations between BRAF levels and the clinical features including age, sex, disease duration, swelling joints, tenderness joints, duration of moning stiffness, joint deformity, visual assessment scale (VAS) and extra articular manifestations and laboratory parameters including erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF), disease activity score in 28 joints (DAS28), anti-cyclic citrullinated peptide (CCP) antibody, antikeratin antibody, antnuclear antibody (ANA), immunoglobulin and cytokines, such as TNF-α, IL-1β, IL-6 and IL-17A in RA patients were evaluated. Data analyses were performed by using SPSS 19.0 program. RESULTS The serum BRAF protein levels in the RA patients were significantly higher than those of other rheumatic diseases groups including OA, SLE, AS, SS, gout patients and healthy controls, the P value was 0.002, <0.001, <0.001, <0.001, 0.001 and <0.001 respectively. The level of serum BRAF protein in the RA patients showed a positive correlation with the rheumatoid factor (P=0.009) and IgA levels (P=0.006), but no correlation with clinical features, such as age and duration or other laboratory parameters, including CRP, ESR, anti-CCP antibody, IgM, IgG, TNF-α, IL-1β, IL-6 and IL-17A. The RA patients were further divided into normal levels of BRAF protein group and elevated levels of BRAF protein group. Compared with the clinical features and laboratory indexes of normal and elevated levels of BRAF protein groups in the RA patients, there was no significant difference between the two groups in age, duration, DAS28, CRP, ESR, RF, anti-CCP, IgA, IgG, IgM, TNF-α or IL-6. CONCLUSION The elevated level of BRAF protein in the RA patients showed that BRAF might play a role in the pathogenesis of RA. Further researches on BRAF gene expression may help to clarify the role of BRAF in RA.
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Affiliation(s)
- Y J Jin
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - L Sun
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - L Yang
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - R Xing
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - X Y Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
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Yoon JH, Jin YJ, Sakaguchi T, Kwak G. Visualization of Sweat Fingerprints on Various Surfaces Using a Conjugated Polyelectrolyte. ACS Appl Mater Interfaces 2016; 8:24025-24029. [PMID: 27558275 DOI: 10.1021/acsami.6b05573] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A conformation-variable conjugated polyelectrolyte responding to oppositely charged biomolecules was examined as an imaging agent for the detection of latent fingerprints (LFPs). Sulfonated poly(diphenylacetylene) (SPDPA) produces high-resolution fluorescence (FL) LFP images by simple wetting of the target objects with the polymer solution without any additional treatment. SPDPA readily interacts with LFP sweat components (especially amino acids) via electrostatic interactions, leading to significantly enhanced FL images in a "turn-on" mode. The FL emission enhancement was examined in a model reaction between SPDPA and an amino acid standard. Visualization with SPDPA is effective on various surfaces, including both rough (paper) and smooth (glass and plastic) ones. Moreover, SPDPA readily interacts with extremely thin sweat LFPs, especially on smooth glass surfaces.
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Affiliation(s)
- Joon-Hyun Yoon
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University , 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Young-Jae Jin
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University , 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Toshikazu Sakaguchi
- Department of Materials Science and Engineering, University of Fukui , Bunkyo, Fukui 910-8507, Japan
| | - Giseop Kwak
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University , 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Kim H, Seo KU, Jin YJ, Lee CL, Teraguchi M, Kaneko T, Aoki T, Kwak G. Highly Emissive, Optically Active Poly(diphenylacetylene) Having a Bulky Chiral Side Group. ACS Macro Lett 2016; 5:622-625. [PMID: 35632383 DOI: 10.1021/acsmacrolett.6b00184] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A highly emissive, optically active poly(diphenylacetylene) derivative, NpSi*-PDPA, was synthesized by introducing a bulky chiral pendant group into the polymer chain. NpSi*-PDPA exists in a glassy state having a highly disordered and amorphous structure. Hence, the fractional free volume is quite high, i.e., 0.29. NpSi*-PDPA emits a green light in solution and a yellow light in film. This polymer is quite emissive, as the photoluminescence (PL) quantum yield is 56.1% in solution and 6.2% in film, and the PL lifetime is relatively long, 1.71 ns in solution and 1.05 ns in film. NpSi*-PDPA shows the strongest circular dichroism (CD) signal at 384 nm, with a magnitude of circular polarization (gCD) of 0.90 × 10-3 and an optical rotation of 110° (4.30 × 10-3 g mL-1, in CHCl3). The CD intensity is significantly increased by annealing at 80 °C, reaching an equilibrium at gCD of 7.10 × 10-3 after 72 h.
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Affiliation(s)
- Hyojin Kim
- School
of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702−701, Korea
- Daegu Technopark Nano Convergence Practical Application Center, 891−5 Daecheon-dong, Dalseo-ku, Daegu 704−801, Korea
| | - Kyo-Un Seo
- School
of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702−701, Korea
| | - Young-Jae Jin
- School
of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702−701, Korea
| | - Chang-Lyoul Lee
- Advanced
Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, Korea
| | - Masahiro Teraguchi
- Graduate
School of Science and Technology, Niigata University, 2-8050 Ikarashi, Nishi-ku, Niigata, Japan
| | - Takashi Kaneko
- Graduate
School of Science and Technology, Niigata University, 2-8050 Ikarashi, Nishi-ku, Niigata, Japan
| | - Toshiki Aoki
- Graduate
School of Science and Technology, Niigata University, 2-8050 Ikarashi, Nishi-ku, Niigata, Japan
| | - Giseop Kwak
- School
of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702−701, Korea
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Abstract
Conjugated-polymer nanofibers with a thermodynamically stable, coarsened, disordered structure in an amorphous glassy state were fabricated via a freeze-drying method using a poly(diphenylacetylene) derivative. The nanofibers were extremely emissive, with a fluorescence (FL) quantum yield of approximately 0.34, which was much higher than that of both the cast film (0.02) and the solution (0.21). Similarly, the amplitude-weighted average FL lifetime of the nanofibers was 0.74 ns, which was much longer than that of the film (0.29 ns) and the solution (0.57 ns). This unusual and enhanced FL-emission behavior was attributed to the abruptly quenched chain structure that was created by the freeze-drying process. The polymer chains in the nanofibers remained frozen-in and the side phenyl rings were retained in a relaxed state. The metastable chains did not undergo vibrational relaxation and collisional quenching to generate the radiative emission decay effectively.
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Affiliation(s)
- Young-Jae Jin
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea.
| | - Wang-Eun Lee
- Reliability Assessment Center for Chemical Materials, Korea Research Institute of Chemical Technology (KRICT), 141 Gajeong-ro, Yuseong-gu, Daejeon 305-600, Korea
| | - Chang-Lyoul Lee
- Advanced Photonics Research Institute (APRI), Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju, Korea.
| | - Giseop Kwak
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea.
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Jin YJ, Kwak G. Properties, Functions, Chemical Transformation, Nano-, and Hybrid Materials of Poly(diphenylacetylene)s toward Sensor and Actuator Applications. POLYM REV 2016. [DOI: 10.1080/15583724.2015.1125919] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Jin YJ, Kim H, Miyata M, Yin G, Kaneko T, Teraguchi M, Aoki T, Kwak G. Influence of a hydrodynamic environment on chain rigidity, liquid crystallinity, absorptivity, and photoluminescence of hydrogen-bonding-assisted helical poly(phenylacetylene). RSC Adv 2016. [DOI: 10.1039/c6ra01940d] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The chain rigidity, liquid crystallinity, absorptivity, and photoluminescence of a helical poly(phenylacetylene) derivative varied significantly depending on the solvent, owing to the conformational changes based on intramolecular hydrogen bonds.
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Affiliation(s)
- Young-Jae Jin
- School of Applied Chemical Engineering
- Major in Polymer Science and Engineering
- Kyungpook National University
- Daegu 702-701
- Korea
| | - Hyojin Kim
- School of Applied Chemical Engineering
- Major in Polymer Science and Engineering
- Kyungpook National University
- Daegu 702-701
- Korea
| | - Mari Miyata
- Department of Chemistry and Chemical Engineering
- Graduate School of Science and Technology
- Center for Transdisciplinary Research
- Niigata University
- Niigata 950-2181
| | - Guanwu Yin
- Department of Chemistry and Chemical Engineering
- Graduate School of Science and Technology
- Center for Transdisciplinary Research
- Niigata University
- Niigata 950-2181
| | - Takashi Kaneko
- Department of Chemistry and Chemical Engineering
- Graduate School of Science and Technology
- Center for Transdisciplinary Research
- Niigata University
- Niigata 950-2181
| | - Masahiro Teraguchi
- Department of Chemistry and Chemical Engineering
- Graduate School of Science and Technology
- Center for Transdisciplinary Research
- Niigata University
- Niigata 950-2181
| | - Toshiki Aoki
- Department of Chemistry and Chemical Engineering
- Graduate School of Science and Technology
- Center for Transdisciplinary Research
- Niigata University
- Niigata 950-2181
| | - Giseop Kwak
- School of Applied Chemical Engineering
- Major in Polymer Science and Engineering
- Kyungpook National University
- Daegu 702-701
- Korea
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Jin YJ, Dogra R, Cheong IW, Kwak G. Fluorescent Molecular Rotor-in-Paraffin Waxes for Thermometry and Biometric Identification. ACS Appl Mater Interfaces 2015; 7:14485-14492. [PMID: 26068003 DOI: 10.1021/acsami.5b03842] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Novel thermoresponsive sensor systems consisting of a molecular rotor (MR) and paraffin wax (PW) were developed for various thermometric and biometric identification applications. Polydiphenylacetylenes (PDPAs) coupled with long alkyl chains were used as MRs, and PWs of hydrocarbons having 16-20 carbons were utilized as phase-change materials. The PDPAs were successfully dissolved in the molten PWs and did not act as an impurity that prevents phase transition of the PWs. These PDPA-in-PW hybrids had almost the same enthalpies and phase-transition temperatures as the corresponding pure PWs. The hybrids exhibited highly reversible fluorescence (FL) changes at the critical temperatures during phase transition of the PWs. These hybrids were impregnated into common filter paper in the molten state by absorption or were encapsulated into urea resin to enhance their mechanical integrity and cyclic stability during repeated use. The wax papers could be utilized in highly advanced applications including FL image writing/erasing, an array-type thermo-indicator, and fingerprint/palmprint identification. The present findings should facilitate the development of novel fluorescent sensor systems for biometric identification and are potentially applicable for biological and biomedical thermometry.
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Affiliation(s)
- Young-Jae Jin
- †School of Applied Chemical Engineering, Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Rubal Dogra
- ‡School of Applied Chemical Engineering, Applied Chemistry, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - In Woo Cheong
- ‡School of Applied Chemical Engineering, Applied Chemistry, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Giseop Kwak
- †School of Applied Chemical Engineering, Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Kim BSI, Jin YJ, Sakaguchi T, Lee WE, Kwak G. Fluorescence Response of Conjugated Polyelectrolyte in an Immiscible Two-Phase System via Nonelectrostatic Interaction with Surfactants. ACS Appl Mater Interfaces 2015; 7:13701-13706. [PMID: 26031657 DOI: 10.1021/acsami.5b03717] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This paper reports a unique fluorescence (FL) response and diverse applications of conjugated polyelectrolyte (CPE) through nonelectrostatic interaction with appropriate (bio)surfactants in an immiscible two-phase system. A sulfonated microporous conjugated polymer (SMCP) with a conformation-variable intramolecular stacked structure was used as the CPE film. Despite the extremely high hydrophilicity, the SMCP film responded significantly to the hydrophobic circumstances, either physicochemically or electronically, in the presence of water-in-oil (w/o)-type nonionic surfactants with appropriate hydrophile-lipophile balance (HLB) values. The polymer film became fully wet with hydrophobic solvents due to the addition of small amounts of (bio)surfactant to reveal remarkable FL emission enhancement and chromism. Microcontact and inkjet printing using the SMCP film (or SMCP-adsorbed paper) and the surfactant solution as substrate and ink, respectively, provided high-resolution FL images due to the distinctive surfactant-induced FL change (SIFC) characteristic. Moreover, the additional electrostatic interaction of SMCP film with oppositely charged surfactants further enhanced the FL emission. Our findings will help comprehensive understanding of the nonelectrostatic SIFC mechanism of CPEs and development of novel SIFC-active materials.
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Affiliation(s)
- Beomsu Shin-Il Kim
- †School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Young-Jae Jin
- †School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
| | - Toshikazu Sakaguchi
- ‡Department of Materials Science and Engineering, Graduate School of Engineering, University of Fukui, Bunkyo 3-9-1, Fukui 910-8507, Japan
| | - Wang-Eun Lee
- §Reliability Assessment Center for Chemical Materials Korea Research Institute of Chemical Technology(KRICT) 141, Gajeong-ro, Yuseong-gu, Daejeon 305-600, Korea
| | - Giseop Kwak
- †School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Affiliation(s)
- Hyojin Kim
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University 1370 Sankyuk-dong, Buk-ku, Daegu 702−701, Korea
- Daegu Technopark Nano Convergence Practical Application Center, 891−5 Daecheon-dong, Dalseo-ku, Daegu 704−801, Korea
| | - Young-Jae Jin
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University 1370 Sankyuk-dong, Buk-ku, Daegu 702−701, Korea
| | - Beomsu Shin-Il Kim
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University 1370 Sankyuk-dong, Buk-ku, Daegu 702−701, Korea
| | - Toshiki Aoki
- Department of Chemistry and Chemical Engineering, Graduate School of Science and Technology, and Center for Transdisciplinary Research, Niigata University, Ikarashi 2-8050, Nishi-ku, Niigata 950-2181, Japan
| | - Giseop Kwak
- School of Applied Chemical Engineering, Major in Polymer Science and Engineering, Kyungpook National University 1370 Sankyuk-dong, Buk-ku, Daegu 702−701, Korea
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Shin-Il Kim B, Jin YJ, Uddin MA, Sakaguchi T, Woo HY, Kwak G. Surfactant chemistry for fluorescence imaging of latent fingerprints using conjugated polyelectrolyte nanoparticles. Chem Commun (Camb) 2015; 51:13634-7. [DOI: 10.1039/c5cc05357a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The polymer nanoparticles were readily transferred to the LFP to reveal highly distinguishable fluorescent images under the presence of surfactant with appropriate HLB value.
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Affiliation(s)
- Beomsu Shin-Il Kim
- School of Applied Chemical Engineering
- Major in Polymer Science and Engineering
- Kyungpook National University
- Daegu 702-701
- Republic of Korea
| | - Young-Jae Jin
- School of Applied Chemical Engineering
- Major in Polymer Science and Engineering
- Kyungpook National University
- Daegu 702-701
- Republic of Korea
| | - Mohammad Afsar Uddin
- Department of Cogno-Mechatronics Engineering
- Pusan National University
- Miryang 627-706
- Republic of Korea
| | - Toshikazu Sakaguchi
- Department of Materials Science and Engineering
- Graduate School of Engineering
- University of Fukui
- Bunkyo 3-9-1
- Japan
| | - Han Young Woo
- Department of Cogno-Mechatronics Engineering
- Pusan National University
- Miryang 627-706
- Republic of Korea
- Department of Chemistry
| | - Giseop Kwak
- School of Applied Chemical Engineering
- Major in Polymer Science and Engineering
- Kyungpook National University
- Daegu 702-701
- Republic of Korea
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Han DC, Jin YJ, Lee JH, Kim SI, Kim HJ, Song KH, Kwak G. Environment-Specific Fluorescence Response of Microporous, Conformation-Variable Conjugated Polymer Film to Water in Organic Solvents: On-line Real-Time Monitoring in Fluidic Channels. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400088] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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)
- Dong-Cheul Han
- Department of Polymer Science and Engineering; Kyungpook National University; 1370, Sankyuk-dong, Buk-ku Daegu 702-701 Korea
- Gumi Electronics and Information Technology Research Institute, Gumi; Gyeongsangbuk-do 730-853 Korea
| | - Young-Jae Jin
- Department of Polymer Science and Engineering; Kyungpook National University; 1370, Sankyuk-dong, Buk-ku Daegu 702-701 Korea
| | - Joong-Heon Lee
- Department of Polymer Science and Engineering; Kyungpook National University; 1370, Sankyuk-dong, Buk-ku Daegu 702-701 Korea
| | - Shin-Il Kim
- Department of Polymer Science and Engineering; Kyungpook National University; 1370, Sankyuk-dong, Buk-ku Daegu 702-701 Korea
| | - Hyo-Jin Kim
- Daegu Technopark Nano Convergence Practical Application, Center; 891-5 Daecheon-dong Dalseo-ku, Daegu 704-801 Korea
| | - Kyu-Ho Song
- Daegu Technopark Nano Convergence Practical Application, Center; 891-5 Daecheon-dong Dalseo-ku, Daegu 704-801 Korea
| | - Giseop Kwak
- Department of Polymer Science and Engineering; Kyungpook National University; 1370, Sankyuk-dong, Buk-ku Daegu 702-701 Korea
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Lee WE, Jin YJ, Kim SI, Kwak G, Kim JH, Sakaguchi T, Lee CL. Fluorescence turn-on response of a conjugated polyelectrolyte with intramolecular stack structure to biomacromolecules. Chem Commun (Camb) 2013; 49:9857-9. [DOI: 10.1039/c3cc45538f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lee WE, Jin YJ, Park LS, Kwak G. Fluorescent actuator based on microporous conjugated polymer with intramolecular stack structure. Adv Mater 2012; 24:5604-5609. [PMID: 22887811 DOI: 10.1002/adma.201201967] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 07/04/2012] [Indexed: 06/01/2023]
Affiliation(s)
- Wang-Eun Lee
- Department of Polymer Science, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku, Daegu 702-701, Korea
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Lee D, Jin YJ, Kim H, Suzuki N, Fujiki M, Sakaguchi T, Kim SK, Lee WE, Kwak G. Solvent-to-Polymer Chirality Transfer in Intramolecular Stack Structure. Macromolecules 2012. [DOI: 10.1021/ma300976r] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Daehoon Lee
- Department of Polymer Science, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702-701, Korea
| | - Young-Jae Jin
- Department of Polymer Science, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702-701, Korea
| | - Hyojin Kim
- Department of Polymer Science, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702-701, Korea
| | - Nozomu Suzuki
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0101,
Japan
| | - Michiya Fujiki
- Graduate
School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama, Ikoma, Nara 630-0101,
Japan
| | - Toshikazu Sakaguchi
- Department of Materials
Science and Engineering, Graduate School of Engineering, University of Fukui, Bunkyo, Fukui 910-8507, Japan
| | - Seog K. Kim
- Department of Chemistry, Yeungnam University, Kyoungsan City, Kyoung-buk 712-749,
Korea
| | - Wang-Eun Lee
- Department of Polymer Science, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702-701, Korea
| | - Giseop Kwak
- Department of Polymer Science, Kyungpook National University, 1370 Sankyuk-dong, Buk-ku,
Daegu 702-701, Korea
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Abstract
A 68-year-old woman presenting with progressive paraparesis was diagnosed with an AVF involving a previously fractured L1 vertebral body on which feeders from multiple segmental arteries converged. The most distinctive feature in our patient was that the fistula was located in the vertebral body. Transarterial embolization of the segmental arteries with coils and glue resulted in total obliteration of the fistula, which in turn resulted in symptom improvement.
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Affiliation(s)
- Y J Jin
- Department of Neurosurgery, Seoul National University College of Medicine, South Korea
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Abstract
E2F-1 controls multiple cellular activities through transcriptional regulation of its target genes. As a mediator of cell death, E2F-1 can eliminate latent neoplastic cells through apoptosis. However, the mechanism by which E2F-1 mediates cancer cell killing is largely unknown. In this paper, we report that phosphatase of activated cells 1 (PAC1) phosphatase is a direct transcription target of E2F-1 in signaling apoptosis. We show that ectopic E2F-1 increases expression of PAC1 at both transcriptional and translational levels in breast cancer cells. E2F-1 physically interacts with the promoter of PAC1, binds to its consensus sequence in the promoter and transactivates the PAC1 promoter. E2F-1 suppresses extracellular signal-regulated kinase (ERK) phosphorylation through PAC1 and causes cancer cell death by apoptosis following treatment with a chemotherapeutic agent N-4-hydroxyphenylretinamide (4-HPR). Furthermore, ectopic PAC1 inhibits ERK phosphorylation and mediates cell killing. Moreover, endogenous E2F-1 upregulates PAC1 and suppresses ERK activity, leading to cell death in response to 4-HPR. These results reveal a crucial role of PAC1 in E2F-1-directed apoptosis. Our study demonstrates that E2F-1 mediates apoptosis through transcriptional regulation of PAC1 and subsequent suppression of the ERK signaling. Our findings establish a functional link between E2F-1 and mitogen-activated protein kinases. The E2F-1-PAC1 cascade in cancer cell killing may provide a molecular basis for cancer therapeutic intervention.
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Affiliation(s)
- J Wu
- Department of Radiation Oncology, Center for Radiological Research, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA
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Masaki T, Igarashi K, Tokuda M, Yukimasa S, Han F, Jin YJ, Li JQ, Yoneyama H, Uchida N, Fujita J, Yoshiji H, Watanabe S, Kurokohchi K, Kuriyama S. pp60c-src activation in lung adenocarcinoma. Eur J Cancer 2003; 39:1447-55. [PMID: 12826049 DOI: 10.1016/s0959-8049(03)00276-4] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Nine src family members are known including c-Src, c-Yes, c-Lck, c-Fyn, c-Hck, c-Lyn, c-Blk, c-Fgr and c-Yrk. They encode proteins with molecular weights of 55-62 kilodaltons (kDa), which are either cytoplasmic or membrane-associated protein tyrosine kinases. A close correlation exists between an elevated pp60c-src tyrosine kinase activity and cell transformation. However, the level of activation of pp60c-src in non-small cell lung cancers (NSCLC) remains obscure. The aim of this study was to examine the level of activity of pp60c-src in NSCLC. pp60c-src expression and in vitro protein tyrosine kinase activity in lung cancer tissue samples were measured by western blotting and in vitro kinase assays and compared with those in the surrounding non-tumour lung tissue from the same patient. pp60c-src phosphorylation was assessed by two-dimensional tryptic phosphopeptide mapping. The kinase activity of pp60c-src was significantly activated in NSCLC, especially in adenocarcinomas. In addition, the pp60c-src kinase activity increased with the size of the adenocarcinoma. Two-dimensional tryptic phosphopeptide mapping showed dephosphorylation of pp60c-src at Tyr 530 in adenocarcinomas. The proto-oncogene product, pp60c-src, was activated in NSCLC, especially in adenocarcinomas, in part through the dephosphorylation of Tyr 530. Our results suggest that activation of pp60c-src might play an important role in the progression of lung adenocarcinomas.
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Affiliation(s)
- T Masaki
- Third Department of Internal Medicine, Kagawa Medical University, 1750-1 Ikenobe Miki-cho, Kagawa 761-0793, Japan
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Yi JY, Yoon YH, Park HS, Kim CH, Kim CH, Kang HJ, Lee E, Kim YY, Jin YJ, Kim TH, Son YS. Reconstruction of basement membrane in skin equivalent; role of laminin-1. Arch Dermatol Res 2001; 293:356-62. [PMID: 11550809 DOI: 10.1007/s004030100234] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
To reconstruct the basement membrane in a skin equivalent, the epidermodermal interface was coated with porcine type IV collagen and mouse laminin-1 at various ratios before keratinocyte seeding. Laminin-1, a component of the basement membrane, induced massive infiltration of keratinocytes into the dermal equivalent, while type IV collagen induced discrete demarcation between dermal and epidermal compartments without any infiltrating cells. Immunohistochemical staining indicated that the laminin-induced infiltrating cells expressed endogenous type IV collagens at the cell periphery, which were not incorporated into the basement membrane structure. The infiltrating cells did not express fibronectin receptor alpha5beta1 integrin but showed MMP-9 secretion and cell surface associated MMP-2. However, when laminin-1 was preincubated with type IV collagen, laminin-1-induced keratinocyte infiltration as well as MMP-9 induction were almost completely suppressed to basal levels. Therefore, replenishment of the type IV collagen lattice seemed to cause laminin-stimulated cells to anchor to the lattice, in a similar manner to the basal cells on the basement membrane of normal skin. Our study suggests that the molar ratio of basement membrane components may determine the behavior of basal cells within the wound healing microenvironment, which is probably regulated either by extracellular matrix deposition or degradation.
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Affiliation(s)
- J Y Yi
- Laboratory of Tissue Engineering, Korea Cancer Center Hospital, Seoul
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Li SZ, Huang PP, Jin YJ. [Effect of sodium ferulate on leucocyte spontaneous activation and surface adhesion molecule expression in arteriosclerosis obliterans patients]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:492-4. [PMID: 12575389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To explore the effect of sodium ferulate (SF) on leucocyte spontaneous activation rate (LSAR) and the surface expression of adhesion molecule (SEAM) in patients with arteriosclerosis obliterans (ASO). METHODS Forty-two patients with ASO were treated by SF, LSAR and SEAM in them were determined qualitatively before and after SF treatment, as well as in 36 healthy subjects for control. RESULTS Therapeutic effect of SF in the treated 42 patients was short-term cured in 17 cases (40.5%), markedly effective in 21 (50%), effective in 2 (4.8%), ineffective in 2(4.8%), and the total effective rate being 95.2%. LSAR and SEAM in ASO patients before treatment was 14.84 +/- 7.54% and 47.94 +/- 13.48% respectively, which was obviously higher than 4.96 +/- 2.04% and 24.12 +/- 9.35% in healthy subjects (P < 0.01) respectively, but markedly reduced to 8.19 +/- 4.09% and 28.63 +/- 7.91% after SF treatment (P < 0.01). CONCLUSION SF could not only obviously lower both LSAR and SEAM but also exert a good therapeutic effect on patients with ASO.
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Affiliation(s)
- S Z Li
- Hospital of Hematologic Diseases, Chinese Academy of Medical Sciences, Peking Union Medical College, Tianjin 300020
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Lee E, Jeon SH, Yi JY, Jin YJ, Son YS. Calcipotriol inhibits autocrine phosphorylation of EGF receptor in a calcium-dependent manner, a possible mechanism for its inhibition of cell proliferation and stimulation of cell differentiation. Biochem Biophys Res Commun 2001; 284:419-25. [PMID: 11394895 DOI: 10.1006/bbrc.2001.4943] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We report in this study that proliferation inhibition of SCC13 cells by calcipotriol was possibly mediated by its inhibitory effect on autocrine activation of EGF receptor. Based on MTT assay, PCNA staining, DAPI staining, and involucrin immunocytochemical staining, we showed that calcipotriol inhibited cell growth and stimulated differentiation but did not induce apoptosis. Western blot analysis of concanavalin-A-bound fraction demonstrated that calcipotriol specifically dephosphorylated 170- and 66-kDa polypeptides from 8 h posttreatment and complete dephosphorylation was observed at 12 h posttreatment. The 170- and 66-kDa polypeptides were confirmed as EGF receptor and Shc, respectively. Calcipotriol-mediated EGF receptor dephosphorylation required the presence of extracellular calcium. Similar kinetics of the dephosphorylation was also observed in HaCaT cells cultured in medium of high calcium concentration. By BrdU labeling, we also showed calcium dependency of calcipotriol for the inhibition of cell proliferation. Therefore, EGF receptor deactivation by calcipotriol might be a mechanism of action for the inhibition of cell proliferation and the stimulation of differentiation in SCC13 cell and HaCaT cells.
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Affiliation(s)
- E Lee
- National Research Laboratory of Tissue Engineering, Korea Cancer Center Hospital, KAERI, 215-4, Gongneung-Dong, Nowon-Gu, Seoul, 139-706, Korea
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Su MW, Yu CL, Burakoff SJ, Jin YJ. Targeting Src homology 2 domain-containing tyrosine phosphatase (SHP-1) into lipid rafts inhibits CD3-induced T cell activation. J Immunol 2001; 166:3975-82. [PMID: 11238643 DOI: 10.4049/jimmunol.166.6.3975] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
To study the mechanism by which protein tyrosine phosphatases (PTPs) regulate CD3-induced tyrosine phosphorylation, we investigated the distribution of PTPs in subdomains of plasma membrane. We report here that the bulk PTP activity associated with T cell membrane is present outside the lipid rafts, as determined by sucrose density gradient sedimentation. In Jurkat T cells, approximately 5--10% of Src homology 2 domain-containing tyrosine phosphatase (SHP-1) is constitutively associated with plasma membrane, and nearly 50% of SHP-2 is translocated to plasma membrane after vanadate treatment. Similar to transmembrane PTP, CD45, the membrane-associated populations of SHP-1 and SHP-2 are essentially excluded from lipid rafts, where other signaling molecules such as Lck, linker for activation of T cells, and CD3 zeta are enriched. We further demonstrated that CD3-induced tyrosine phosphorylation of these substrates is largely restricted to lipid rafts, unless PTPs are inhibited. It suggests that a restricted partition of PTPs among membrane subdomains may regulate protein tyrosine phosphorylation in T cell membrane. To test this hypothesis, we targeted SHP-1 into lipid rafts by using the N-terminal region of Lck (residues 1--14). The results indicate that the expression of Lck/SHP-1 chimera inside lipid rafts profoundly inhibits CD3-induced tyrosine phosphorylation of CD3 zeta/epsilon, IL-2 generation, and nuclear mobilization of NF-AT. Collectively, these results suggest that the exclusion of PTPs from lipid rafts may be a mechanism that potentiates TCR/CD3 activation.
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Affiliation(s)
- M W Su
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA
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Jin YJ, Song JD. [The inhibitory effect of asODNs on the invasion of colorectal cancer cell line CCL229]. Shi Yan Sheng Wu Xue Bao 2000; 33:21-6. [PMID: 12548848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
To study the inhibitory effect of antisense oligodeoxynucleotide (asODNs) on colrectal cancer cell line CCL229 invasion in vitro. A 15-mer asODNs targeted against the translation start site of UPAR (urokinase-type plasminogen activator receptor) mRNA were introduced into CCL229 cells by lipid-mediated DNA-transfection and the variation of the levels of uPAR mRNA, uPAR antigen expression of the levels of uPAR mRNA, uPAR antigen expression on the cell sruface and invasion properties were observed by reverse transcription-polymerase chain reaction (RT-PCR), flowcytometry(FCM) and aminion invasion assay, the morphological feature of the cell after asODNs treatment was observed by scanning electron microscope(SEM). The results indicate (1) the uPAR/beta-actin ratio was 0.44 +/- 0.02 for the asODNs treated cells, which is significantly lower compared with the control and rONDs treated cells (0.81 +/- 0.01 and 0.750 +/- 0.13 respectively, P < 0.01), (2) the mean fluorescence index of uPAR combined with uPA and the whole uPAR on surface were 0.20 +/- 0.07 and 0.59 +/- 0.09 respectively for asODNs treated cells, which is significantly lower compared with control cells (0.72 +/- 0.12 and 2.21 +/- 0.36 respectively, P < 0.05, P < 0.01); (3) the number of cells migrated the aminion (25 +/- 4, 44 +/- 5 for the control cells) obviously decreased after a-sODNs treatment, (12 +/- 2, 20 +/- 3, P < 0.05); (4) the filopodia and microspikes on the CCL 229 cell surface were decreased after asODNs treatment. The conclusion is that the expression of uPAR on the surface of CCL229 cell surface is responsible for invasity; the inhibitory effect of uPAR as ODNs were highly significant and this method may be of potential clinical interest in gene therapy of cancer.
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Affiliation(s)
- Y J Jin
- Institute of Medical Molecular Biology, China Medical University, Key Laboratory of Cell Biology, Ministry of Public Health of China, Shenyang 110001
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Abstract
We investigated whether anticoagulant therapy with heparin or a selective thrombin inhibitor, argatroban, may ameliorate the postischemic cerebral circulation and attenuate mortality after 10 min of forebrain ischemia. Postischemic subcutaneous injection of argatroban (5 mg/kg) significantly attenuated mortality (9.1%) compared with non-treatment (45.5%) during 14 days' observation period. This effect coincided with: (1) increased cortical CBF after reperfusion; (2) attenuation of brain edema; and (3) less severe cell damages in the cerebral cortex. In contrast, nine of the 22 gerbils treated with heparin (830 IU/kg) were found dead on the next day due to massive bleeding in the surgical wound and 13 bleeding-avoided gerbils did not show significant amelioration in mortality (30.8%). These findings suggest that argatroban is an effective anticoagulant for prevention of cell damage after a relatively long forebrain ischemia.
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Affiliation(s)
- T Mima
- Department of Neurosurgery, Kochi Medical School, Nankoku City, Japan.
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49
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Abstract
STAT5, a member of the signal transducers and activators of transcription (STATs), is important in modulating T cell functions through interleukin-2 (IL-2) receptors. Like other STAT proteins, STAT5 undergoes a rapid activation and inactivation cycle upon cytokine stimulation. Tyrosine phosphorylation and dephosphorylation are critical in regulating STAT5 activity. A number of protein tyrosine kinases have been shown to phosphorylate STAT5; however, the phosphatases responsible for STAT5 dephosphorylation remain unidentified. Using CTLL-20 as a model system, we provide evidence that tyrosine dephosphorylation of STAT5 subsequent to IL-2-induced phosphorylation occurs in the absence of STAT5 nuclear translocation and new protein synthesis. Nevertheless, down-regulation of the upstream Janus kinase activity during the deactivation cycle of IL-2-induced signaling does involve new protein synthesis. These findings point to the constitutive presence of STAT5 tyrosine phosphatase activity in the cytosolic compartment. We further demonstrate that SHP-2, but not SHP-1, directly dephosphorylates STAT5 in an in vitro tyrosine phosphatase assay with purified proteins. Furthermore, tyrosine-phosphorylated STAT5 associates with the substrate-trapping mutant (Cys --> Ser) of SHP-2 but not SHP-1. These results suggest a potential role for cytoplasmic protein-tyrosine phosphatases in directly dephosphorylating STAT proteins and in maintaining a basal steady state level of STAT activity.
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Affiliation(s)
- C L Yu
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Massachusetts 02115, USA
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50
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Abstract
The tyrosine phosphatase SHP-1 functions as a negative regulator in hematopoietic cell development, proliferation, and receptor-mediated cellular activation. In Jurkat T cells, a major 68-kDa band and a minor 70-kDa band were immunoprecipitated by a monoclonal antibody against the SHP-1 protein-tyrosine phosphatase domain, while an antibody against the SHP-1 C-terminal 19 amino acids recognized only the 68-kDa SHP-1. The SDS-gel-purified 70-kDa protein was subjected to tryptic mapping and microsequencing, which was followed by molecular cloning. It revealed that the 70-kDa protein, termed SHP-1L, is a C-terminal alternatively spliced form of SHP-1. SHP-1L is 29 amino acids longer than SHP-1, and its 66 C-terminal amino acids are different from SHP-1. The C terminus of SHP-1L contains a proline-rich motif PVPGPPVLSP, a potential Src homology 3 domain-binding site. In contrast to SHP-1, tyrosine phosphorylation of SHP-1L is not detected upon stimulation in Jurkat T cells. This is apparently due to the lack of a single in vivo tyrosine phosphorylation site, which only exists in the C terminus of SHP-1 (Y564). COS cell-expressed glutathione S-transferase-SHP-1L can dephosphorylate tyrosine-phosphorylated ZAP70. At pH 7.4, SHP-1L was shown to be more active than SHP-1 in the dephosphorylation of ZAP70. At pH 5.4, SHP-1L and SHP-1 exhibited similar catalytic activity. It is likely that these two isoforms play different roles in the regulation of hematopoietic cell signal transduction.
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Affiliation(s)
- Y J Jin
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA.
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