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Zhang Y, Chen X, Wang Y, Li L, Ju Q, Zhang Y, Xi H, Wang F, Qiu D, Liu X, Chang N, Zhang W, Zhang C, Wang K, Li L, Zhang J. Alterations of lower respiratory tract microbiome and short-chain fatty acids in different segments in lung cancer: a multiomics analysis. Front Cell Infect Microbiol 2023; 13:1261284. [PMID: 37915846 PMCID: PMC10617678 DOI: 10.3389/fcimb.2023.1261284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Accepted: 09/20/2023] [Indexed: 11/03/2023] Open
Abstract
Introduction The lower respiratory tract microbiome is widely studied to pinpoint microbial dysbiosis of diversity or abundance that is linked to a number of chronic respiratory illnesses. However, it is vital to clarify how the microbiome, through the release of microbial metabolites, impacts lung health and oncogenesis. Methods In order to discover the powerful correlations between microbial metabolites and disease, we collected, under electronic bronchoscopy examinations, samples of paired bronchoalveolar lavage fluids (BALFs) from tumor-burden lung segments and ipsilateral non-tumor sites from 28 lung cancer participants, further performing metagenomic sequencing, short-chain fatty acid (SCFA) metabolomics, and multiomics analysis to uncover the potential correlations of the microbiome and SCFAs in lung cancer. Results In comparison to BALFs from normal lung segments of the same participant, those from lung cancer burden lung segments had slightly decreased microbial diversity in the lower respiratory tract. With 18 differentially prevalent microbial species, including the well-known carcinogens Campylobacter jejuni and Nesseria polysaccharea, the relative species abundance in the lower respiratory tract microbiome did not significantly differ between the two groups. Additionally, a collection of commonly recognized probiotic metabolites called short-chain fatty acids showed little significance in either group independently but revealed a strong predictive value when using an integrated model by machine learning. Multiomics also discovered particular species related to SCFAs, showing a positive correlation with Brachyspira hydrosenteriae and a negative one with Pseudomonas at the genus level, despite limited detection in lower airways. Of note, these distinct microbiota and metabolites corresponded with clinical traits that still required confirmation. Conclusions Further analysis of metagenome functional capacity revealed that genes encoding environmental information processing and metabolism pathways were enriched in the lower respiratory tract metagenomes of lung cancer patients, further supporting the oncogenesis function of various microbial species by different metabolites. These findings point to a potent relationship between particular components of the integrated microbiota-metabolites network and lung cancer, with implications for screening and diagnosis in clinical settings.
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Affiliation(s)
- Yong Zhang
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
- National Translational Science Center for Molecular Medicine & Department of Cell Biology, Fourth Military Medical University, Xi’an, China
| | - Xiangxiang Chen
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Yuan Wang
- Department of Microbiology, School of Basic Medicine of Fourth Military Medical University, Xi’an, China
| | - Ling Li
- Department of Pediatrics, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Qing Ju
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Yan Zhang
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Hangtian Xi
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Fahan Wang
- School of Basic Medicine, Fourth Military Medical University, Xi’an, China
| | - Dan Qiu
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Xingchen Liu
- School of Basic Medicine, Fourth Military Medical University, Xi’an, China
| | - Ning Chang
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Weiqi Zhang
- Department of Radiology, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Cong Zhang
- Department of Radiation Oncology, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
| | - Ke Wang
- National Translational Science Center for Molecular Medicine & Department of Cell Biology, Fourth Military Medical University, Xi’an, China
| | - Ling Li
- National Translational Science Center for Molecular Medicine & Department of Cell Biology, Fourth Military Medical University, Xi’an, China
| | - Jian Zhang
- Department of Pulmonary and Critical Care of Medicine, The First Affiliated Hospital of Fourth Military Medical University, Xi’an, China
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2
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Sun KM, Wang J, Ju Q, Zhao Y, Kong X, Yuan C, Tian Y. The mitigating effects of diatom-bacteria biofilm on coastal harmful algal blooms: A lab-based study concerning species-specific competition and biofilm formation. J Environ Manage 2023; 335:117544. [PMID: 36842356 DOI: 10.1016/j.jenvman.2023.117544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 12/15/2022] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
Harmful algal blooms (HABs) in coastal areas severely affected the health of ecosystem and human beings. The HABs control by biological methods, especially for biofilms, has been research hotspots in freshwater ecosystem. However, the biofilm-relating control of HABs in marine environment was very limited. In the present study, we found the population growth of two harmful algal species, Prorocentrum obtusidens Schiller (formerly P. donghaiense Lu) and Heterosigma akashiwo, were inhibited by a diatom-bacteria biofilm. The highest inhibitory rate was 79.6 ± 2.1% for P. obtusidens when co-cultured with biofilm suspension, and was 88.6 ± 5.8% for H. akashiwo when co-cultured with the biofilm filtrate without nutrient replenishment. When nitrate and phosphate were added, the inhibition rate for P. obtusidens was 72.3 ± 2.0%, but the population inhibition was not found in H. akashiwo. It suggested that P. obtusidens was mainly inhibited via interference competition, while the inhibition of H. akashiwo was resulted from exploitation competition. We further investigated the role of fatty acids for the interference competition in P. obtusidens, and found that fatty acids at their environmental-relevance concentrations can inhibit the photosynthetic capacity of P. obtusidens, but cannot inhibit the population growth. The community of biofilm shifted, and was finally dominated by the photoheterotrophic bacterium Dinoroseobacter shibae, and the diatom Fistulifera sp. with relative abundance of higher than 90%. Our study indicated that the diatom-bacteria biofilm was likely the candidate for the HABs control in marine environment. D. shibae and Fistulifera sp. were probably the effective species in the biofilm.
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Affiliation(s)
- Kai-Ming Sun
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao, 266100, Shandong, China; SOA Key Laboratory of Science and Engineering for Marine Ecology and Environment, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, Shandong, China
| | - Jingru Wang
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao, 266100, Shandong, China
| | - Qing Ju
- Shandong Provincial Qingdao Eco-environment Monitoring Center, Qingdao, 266061, Shandong, China
| | - Yan Zhao
- College of Marine Life, Ocean University of China, Qingdao, 266003, Shandong, China
| | - Xiangfeng Kong
- Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences), Qingdao, 266100, Shandong, China
| | - Chao Yuan
- SOA Key Laboratory of Science and Engineering for Marine Ecology and Environment, First Institute of Oceanography, Ministry of Natural Resources, Qingdao, 266061, Shandong, China.
| | - Yulu Tian
- Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Sciences, Northwest University, Xi'an, 710127, China.
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Chen RY, Ju Q, Feng LM, Yuan Q, Zhang L. Retraction Note: The carcinogenic complex lncRNA FOXP4-AS1/EZH2/LSD1 accelerates proliferation, migration and invasion of gastric cancer. Eur Rev Med Pharmacol Sci 2022; 26:5311. [PMID: 35993622 DOI: 10.26355/eurrev_202208_29394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The article "The carcinogenic complex lncRNA FOXP4-AS1/EZH2/LSD1 accelerates proliferation, migration and invasion of gastric cancer, by R.-Y. Chen, Q. Ju, L.-M. Feng, Q. Yuan, L. Zhang, published in Eur Rev Med Pharmacol Sci 2019; 23 (19): 8371-8376-DOI: 10.26355/eurrev_201910_19148-PMID: 31646567" has been retracted by the authors. After publication, the authors raised concerns about the reliability of the data used to conduct the study by stating that some data cannot be repeated by further research. The Publisher apologizes for any inconvenience this may cause. https://www.europeanreview.org/article/19148.
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Affiliation(s)
- R-Y Chen
- Department of Gastrointestinal Surgery, Qingdao Central Hospital, Qingdao, China
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4
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Shi H, Zhu Y, Ju Q, Shen Y, Wang T. Enhanced properties of starch based foams with modified starch/polyester blend as masterbatch. J Appl Polym Sci 2022. [DOI: 10.1002/app.52951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Huidong Shi
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
| | - Yanfeng Zhu
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
| | - Qing Ju
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
| | - Yucai Shen
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Suqian Advanced Materials Institute of Nanjing Tech University Suqian China
| | - Tingwei Wang
- College of Materials Science and Engineering Nanjing Tech University Nanjing China
- Suqian Advanced Materials Institute of Nanjing Tech University Suqian China
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Gu C, Li W, Ju Q, Yao H, Yang L, An B, Hu W, Li X. Synthesis and evaluation of new pirfenidone derivatives as anti-fibrosis agents. RSC Adv 2022; 12:14492-14501. [PMID: 35702193 PMCID: PMC9102048 DOI: 10.1039/d2ra00990k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/16/2022] [Indexed: 11/21/2022] Open
Abstract
Two series of new pirfenidone derivatives, in which phenyl groups or benzyl groups are attached to the nitrogen atom of the pyridin-2(1H)-one moiety were synthesized and evaluated as anti-fibrosis agents. Among them, compound 5d, with a (S)-2-(dimethylamino) propanamido group in the R2 position (series 1) exhibited 10 times the anti-fibrosis activity (IC50: 0.245 mM) of pirfenidone (IC50: 2.75 mM). Compound 9d (series 2) gave an IC50 of 0.035 mM against the human fibroblast cell line HFL1. The mechanism of the optimal compound inhibiting fibrosis was also studied.
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Affiliation(s)
- Chenxi Gu
- School of Pharmaceutical Sciences, Sun Yat-Sen University Guangzhou 510006 PR China
| | - Wei Li
- School of Pharmaceutical Sciences, Sun Yat-Sen University Guangzhou 510006 PR China
| | - Qing Ju
- Medicine and Pharmacy Research Center, Binzhou Medical University Yantai Shandong Province 264003 PR China
| | - Han Yao
- School of Pharmaceutical Sciences, Sun Yat-Sen University Guangzhou 510006 PR China
| | - Lisheng Yang
- School of Pharmaceutical Sciences, Sun Yat-Sen University Guangzhou 510006 PR China
| | - Baijiao An
- Medicine and Pharmacy Research Center, Binzhou Medical University Yantai Shandong Province 264003 PR China
| | - Wenhao Hu
- School of Pharmaceutical Sciences, Sun Yat-Sen University Guangzhou 510006 PR China
| | - Xingshu Li
- School of Pharmaceutical Sciences, Sun Yat-Sen University Guangzhou 510006 PR China
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6
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Hu B, Huang Y, Liu L, Hu X, Geng K, Ju Q, Liu M, Bi J, Luo S, Li N. A stable ion-solvating PBI electrolyte enabled by sterically bulky naphthalene for alkaline water electrolysis. J Memb Sci 2022. [DOI: 10.1016/j.memsci.2021.120042] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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7
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Che Y, Jiang D, Xu L, Sun Y, Wu Y, Liu Y, Chang N, Fan J, Xi H, Qiu D, Ju Q, Pan J, Zhang Y, Yang K, Zhang J. The Clinical Prediction Value of the Ubiquitination Model Reflecting the Immune Traits in LUAD. Front Immunol 2022; 13:846402. [PMID: 35281055 PMCID: PMC8913715 DOI: 10.3389/fimmu.2022.846402] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 01/31/2022] [Indexed: 12/25/2022] Open
Abstract
Background Increasing evidence shows that the ubiquitin–proteasome system has a crucial impact on lung adenocarcinoma. However, reliable prognostic signatures based on ubiquitination and immune traits have not yet been established. Methods Bioinformatics was performed to analyze the characteristic of ubiquitination in lung adenocarcinoma. Principal component analysis was employed to identify the difference between lung adenocarcinoma and adjacent tissue. The ubiquitin prognostic risk model was constructed by multivariate Cox regression and least absolute shrinkage and selection operator regression based on the public database The Cancer Genome Atlas, with evaluation of the time-dependent receiver operating characteristic curve. A variety of algorithms was used to analyze the immune traits of model stratification. Meanwhile, the drug response sensitivity for subgroups was predicted by the “pRRophetic” package based on the database of the Cancer Genome Project. Results The expression of ubiquitin genes was different in the tumor and in the adjacent tissue. The ubiquitin model was superior to the clinical indexes, and four validation datasets verified the prognostic effect. Additionally, the stratification of the model reflected distinct immune landscapes and mutation traits. The low-risk group was infiltrating plenty of immune cells and highly expressed major histocompatibility complex and immune genes, which illustrated that these patients could benefit from immune treatment. The high-risk group showed higher mutation and tumor mutation burden. Integrating the tumor mutation burden and the immune score revealed the patient’s discrepancy between survival and drug response. Finally, we discovered that the drug targeting ubiquitin and proteasome would be a beneficial prospective treatment for lung adenocarcinoma. Conclusion The ubiquitin trait could reflect the prognosis of lung adenocarcinoma, and it might shed light on the development of novel ubiquitin biomarkers and targeted therapy for lung adenocarcinoma.
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Affiliation(s)
- Yinggang Che
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
- Department of Immunology, Basic Medicine School, Air-Force Medical University, Xi’an, China
| | - Dongbo Jiang
- Department of Immunology, Basic Medicine School, Air-Force Medical University, Xi’an, China
| | - Leidi Xu
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
| | - Yuanjie Sun
- Department of Immunology, Basic Medicine School, Air-Force Medical University, Xi’an, China
| | - Yingtong Wu
- Department of First Sanatorium, First Sanatorium of Air Force Healthcare Center for Special Services, Hangzhou, China
| | - Yang Liu
- Shaanxi Provincial Center for Disease Control and Prevention, Xi’an, China
| | - Ning Chang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
| | - Jiangjiang Fan
- Department for AIDS Prevention and Control, Department of Thoracic Surgery, Tangdu Hospital, Air-Force Medical University, Xi’an, China
| | - Hangtian Xi
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
| | - Dan Qiu
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
| | - Qing Ju
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
| | - Jingyu Pan
- Department of Immunology, Basic Medicine School, Air-Force Medical University, Xi’an, China
| | - Yong Zhang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
- *Correspondence: Jian Zhang, ; Kun Yang, ; Yong Zhang,
| | - Kun Yang
- Department of Immunology, Basic Medicine School, Air-Force Medical University, Xi’an, China
- *Correspondence: Jian Zhang, ; Kun Yang, ; Yong Zhang,
| | - Jian Zhang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Air-Force Medical University, Xi’an, China
- *Correspondence: Jian Zhang, ; Kun Yang, ; Yong Zhang,
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8
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Xu T, Xu L, Xi H, Zhang Y, Zhou Y, Chang N, Yang W, Zhang Y, Wang M, Ju Q, Yang X, Chen X, Che Y, Chen F, Qu S, Zhang J. Assessment of Financial Toxicity Among Patients With Advanced Lung Cancer in Western China. Front Public Health 2022; 9:754199. [PMID: 35096733 PMCID: PMC8790143 DOI: 10.3389/fpubh.2021.754199] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 12/07/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Lung cancer is the leading source of cancer-caused disability-adjusted life years. Medical cost burden impacts the well-being of patients through reducing income, cutting daily expenses, curtailing leisure activities, and depleting exhausting savings. The COmprehensive Score for Financial Toxicity (COST) was created and validated by De Souza and colleagues. Our study intends to measure the financial burdens of cancer therapy and investigate the link between financial toxicity and health-related quality of life (HRQoL) in an advanced lung cancer population. Methods: Patients aged ≥ 18 years with confirmed stage III to IV lung cancer were eligible. The COST questionnaire verified by de Souza et al. was used to identify financial toxicity. Multivariable linear regression analysis with log transformation univariate analysis and Pearson correlations were used to perform the analysis. Results: The majority of the patients (90.8%, n = 138/152) had an annual income of $50,000 ($7,775). The cohort's insurance situation was as follows: 64.5% of the cohort had social insurance, 20.4% had commercial insurance, and 22.0% had both. Patients who were younger age (50-59, P < 0.001), employed but on sick leave, and had lower income reported increased levels of financial toxicity (P < 0.05). The risk factors for high financial toxicity: (i) younger age (50-59), (ii) <1 month of savings, and (iii) being employed but on sick leave. Increased financial toxicity is moderately correlated with a decrease in QoL. Conclusion: Poorer psychological status and specific demographics are linked to increased financial toxicity (lower COST). Financial toxicity has a modest relationship with HRQoL and may have a clear link with HRQoL measurements.
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Affiliation(s)
- Tianqi Xu
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,School of Public Health, Air Force Medical University, Xi'an, China
| | - Leidi Xu
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Hangtian Xi
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,School of Public Health, Air Force Medical University, Xi'an, China
| | - Yong Zhang
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Ying Zhou
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Ning Chang
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Wenhui Yang
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,School of Public Health, Air Force Medical University, Xi'an, China
| | - Yan Zhang
- Szechwan Maternal and Child Care Service Centre, Szechwan, China
| | - Ming Wang
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Qing Ju
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Xuemin Yang
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Xiangxiang Chen
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Yinggang Che
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Fulin Chen
- College of Life Sciences, Northwest University, Xi'an, China
| | - Shuoyao Qu
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Jian Zhang
- Department of Pulmonary Medicine, Xijing Hospital, Air Force Medical University, Xi'an, China.,College of Life Sciences, Northwest University, Xi'an, China
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9
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Ju Q, Wu YT, Zhang Y, Yang WH, Zhao CL, Zhang J. Histology transformation-mediated pathological atypism in small-cell lung cancer within the presence of chemotherapy: A case report. World J Clin Cases 2021; 9:10652-10658. [PMID: 35004997 PMCID: PMC8686138 DOI: 10.12998/wjcc.v9.i34.10652] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 05/27/2021] [Accepted: 10/20/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The treatment of small-cell lung cancer (SCLC) has progressed little in recent years because of its unique biological activities and complex genomic alterations. Chemotherapy combined with radiotherapy has been widely accepted as the first-line treatment for SCLC.
CASE SUMMARY Here, we present a 68-year-old male smoker who was diagnosed with SCLC of the right lung. After several cycles of concurrent chemoradiotherapy, the tumor progressed with broad metastasis to liver and bone. Histopathological examination showed an obvious transformation to adenocarcinoma, probably a partial recurrence mediated by the chemotherapy-based regimen. A mixed tumor as the primary lesion and transformation from SCLC or/and tumor stem cells may have accounted for the pathology conversion. We adjusted the treatment schedule in accord with the change in phenotype.
CONCLUSION Although diffuse skeletal and hepatic metastases were seen on a recent computed tomography scan, the patient is alive, with intervals of progression and shrinkage of his cancer.
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Affiliation(s)
- Qing Ju
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Xi'an 710000, Shaanxi Province, China
| | - Ying-Tong Wu
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Xi'an 710000, Shaanxi Province, China
| | - Yong Zhang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Xi'an 710000, Shaanxi Province, China
| | - Wen-Hui Yang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Xi'an 710000, Shaanxi Province, China
| | - Cheng-Lei Zhao
- Department of Dermatology, Southwest Hospital, Chongqing 404100, China
| | - Jian Zhang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Xi'an 710000, Shaanxi Province, China
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10
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Wang L, Yang M, Wang X, Cheng B, Ju Q, Eichenfield DZ, Sun BK. Glucocorticoids Promote CCL20 Expression in Keratinocytes. Br J Dermatol 2021; 185:1200-1208. [PMID: 34157145 PMCID: PMC9290737 DOI: 10.1111/bjd.20594] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/17/2021] [Indexed: 11/28/2022]
Abstract
Glucocorticoids (GC) are generally envisioned as immunosuppressive, but in conditions such as rosacea and perioral dermatitis they can lead to increased skin inflammation. In lung epithelia, GC promote expression of the pro-inflammatory cytokine CCL20, which contributes to steroid-resistant asthma. In the skin, CCL20 stimulates inflammation by recruiting Th17 T-lymphocytes and dendritic cells and is elevated in papulopustular rosacea. The objective of this study was to understand if and how glucocorticoids affect CCL20 expression in human keratinocytes. CCL20 expression was assessed by quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) and ELISA. Selective inhibition of candidate genes and signaling pathways was performed using RNA interference and chemical inhibitors. The binding of activated glucocorticoid receptor to genomic DNA was determined by chromatin immunoprecipitation, and enhancer activity of genomic sequences was measured with a reporter assay. We found that GC treatment increased CCL20 expression in human keratinocytes and murine skin, both in the undisturbed state and with tumor necrosis factor-α (TNFα) stimulation. GC repressed pro-inflammatory signaling pathways including NFκB and p38/MAPK, but these inhibitory effects were opposed by the direct binding of activated glucocorticoid receptor to the CCL20 enhancer, promoting CCL20 expression. Viewed together, these findings demonstrate a mechanism by which GC induce expression of CCL20 in keratinocytes, which may contribute to the inflammation seen in steroid-exacerbated skin conditions.
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Affiliation(s)
- L Wang
- Department of Dermatology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, China.,Department of Dermatology, University of California San Diego, La Jolla, California, 92093, USA
| | - M Yang
- State Key Laboratory of Oncogenes and Related Genes, Renji-Med X Clinical Stem Cell Research Center, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200127, China
| | - X Wang
- Department of Dermatology, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, China
| | - B Cheng
- Department of Dermatology, University of California San Diego, La Jolla, California, 92093, USA
| | - Q Ju
- Department of Dermatology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200127, China
| | - D Z Eichenfield
- Department of Dermatology, University of California San Diego, La Jolla, California, 92093, USA
| | - B K Sun
- Department of Dermatology, University of California San Diego, La Jolla, California, 92093, USA
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11
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Wang L, Yang M, Wang X, Ju Q, Eichenfield D, Cheng B, Sun B. 154 Glucocorticoids promote inflammation by induction of CCL20 expression in keratinocytes. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Pan Z, Ju Q, Zhao D, Shen Y, Wang T. Enhanced oxygen barrier properties of poly(lactic acid) via oxygen scavenging strategy combining with uniaxial stretching. Int J Biol Macromol 2021; 181:521-527. [PMID: 33794239 DOI: 10.1016/j.ijbiomac.2021.03.161] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 03/14/2021] [Accepted: 03/25/2021] [Indexed: 11/28/2022]
Abstract
Poly(lactic acid) (PLA) films with significantly enhanced mechanical and oxygen barrier properties were obtained via oxygen scavenging strategy combining with uniaxial stretching. In this study, PLA was melt blended with 3 phr of hydroxy-terminated polybutadiene (HTPB) and different contents of acetyl(tributyl citrate) (ATBC) and cobalt neodecanoate. It was then followed by compression molding and uniaxial stretching. After uniaxial stretching, the crystallinity of all films was significantly improved, which contributed to the enhancement in the oxygen barrier performance of composite materials. The morphological analysis carried out using scanning electron microscopy (SEM) revealed that ATBC could obviously promote the dispersion of HTPB in PLA. Overall, the blend films showed a decrease in the oxygen permeability coefficient as compared with the neat PLA film, which reached a similar level to oriented PET film. The optical and mechanical properties of the blend films with ATBC also improved considerably. This work provides a method to prepare high-crystalline polymers with superior gas-barrier properties having great potential for use in high-barrier applications, such as polymers for oxygen-sensitive food packaging.
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Affiliation(s)
- Zeyuan Pan
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Qing Ju
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Dong Zhao
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing 211816, China
| | - Yucai Shen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; Suqian Advanced Materials Institute of Nanjing Tech University, Suqian 223800, China.
| | - Tingwei Wang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China; Suqian Advanced Materials Institute of Nanjing Tech University, Suqian 223800, China
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13
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Hu X, Huang Y, Liu L, Ju Q, Zhou X, Qiao X, Zheng Z, Li N. Piperidinium functionalized aryl ether-free polyaromatics as anion exchange membrane for water electrolysers: Performance and durability. J Memb Sci 2021. [DOI: 10.1016/j.memsci.2020.118964] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [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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14
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Ju Q, Huang T, Zhang Y, Wu L, Geng J, Mu X, Yan T, Zhang J. Systemic immune-inflammation index predicts prognosis in patients with different EGFR-mutant lung adenocarcinoma. Medicine (Baltimore) 2021; 100:e24640. [PMID: 33578585 PMCID: PMC7886494 DOI: 10.1097/md.0000000000024640] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 01/14/2021] [Indexed: 01/05/2023] Open
Abstract
Lung cancer is the most common type of cancer worldwide with a high mortality rate. The specific tyrosine kinase inhibitors of epidermal growth factor receptor (EGFR) have made enormous strides in non-small-cell lung cancer (NSCLC) treatment. The novel systemic immune-inflammation index (SII), a parameter that integrates lymphocytes, neutrophils, and platelets, has been found to play the vital role of a marker for predicting survival and recrudescence in various tumors.We retrospectively examined 102 patients with different EGFR-mutant lung adenocarcinomas. Survival analysis was performed using the Kaplan-Meier method with the log-rank test. Cut-off points were identified using the receiver operating characteristic curves with the maximum log-rank values. The Cox proportional hazards regression, expressed as p value, hazards regression, and 95% confidence interval, was conducted to assess the prognostic values of variables in overall survival (OS)/ progression-free survival (PFS).Lower SII was associated with prolonged survival in patients with different EGFR mutant lung adenocarcinomas in both variable and multivariable analyses.SII before treatment was a powerful indicator for the PFS and OS of patients who received the first-generation EGFR-TKI.
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Affiliation(s)
- Qing Ju
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Fourth Military Medical University, 127 Changle West Road, Xi’an, Shaanxi
| | - Tingping Huang
- Department of Gastroenterology, Shandong Provincial Hospital, Cheeloo College of Medicine
| | - Yong Zhang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Fourth Military Medical University, 127 Changle West Road, Xi’an, Shaanxi
| | - Lei Wu
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Fourth Military Medical University, 127 Changle West Road, Xi’an, Shaanxi
| | | | - Xiaoyan Mu
- Department of Healthcare Respiratory Medicine, Shandong Provincial Hospital Affiliated to Shandong University
| | - Tao Yan
- Department of Thoracic surgery, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, PR China
| | - Jian Zhang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Fourth Military Medical University, 127 Changle West Road, Xi’an, Shaanxi
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Chen RY, Ju Q, Feng LM, Yuan Q, Zhang L. The carcinogenic complex lncRNA FOXP4-AS1/EZH2/LSD1 accelerates proliferation, migration and invasion of gastric cancer. Eur Rev Med Pharmacol Sci 2020; 23:8371-8376. [PMID: 31646567 DOI: 10.26355/eurrev_201910_19148] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To clarify the role of lncRNA FOX4-AS1 in the progression of gastric cancer (GC) via interacting with EZH2/LSD1. PATIENTS AND METHODS Relative level of FOXP4-AS1 in GC tissues and adjacent normal tissues was determined by quantitative Real Time-Polymerase Chain Reaction (qRT-PCR). The potential influences of FOXP4-AS1 on cellular behaviors of GC cells were evaluated via a series of functional experiments. Bioinformatics prediction, RNA immunoprecipitation (RIP) assay, and Western blot were conducted to verify the potential of EZH2/LSD1 as a target of FOXP4-AS1. RESULTS FOXP4-AS1 was upregulated in GC tissues relative to controls. Its level was higher in GC patients with stage III-IV than those with stage I-II. The survival rate was lower in GC patients presenting the high expression of FOXP4-AS1 compared with those presenting low expression. Transfection of sh-FOXP4-AS1 1# or sh-FOXP4-AS1 2# attenuated proliferative, migratory, and invasive abilities of AGS and BGC7901 cells. FOXP4-AS1 could bind to LSD1 and EZH2, and positively regulated their expression levels. Transfection of sh-LSD1 or sh-EZH2 reduced the proliferative ability of GC cells. CONCLUSIONS FOXP4-AS1 binds to EZH2/LSD1 to form a carcinogenic complex, thus accelerating GC cells to proliferate, migrate and invade.
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Affiliation(s)
- R-Y Chen
- Department of Gastrointestinal Surgery, Qingdao Central Hospital, Qingdao, China.
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16
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Han D, Luo Y, Ju Q, Xiao X, Xiao M, Xiao N, Chen S, Peng X, Wang S, Meng Y. Nano-Brick Wall Architectures Account for Super Oxygen Barrier PET Film by Quadlayer Assembly of Polyelectrolytes and α-ZrP Nanoplatelets. Polymers (Basel) 2018; 10:E1082. [PMID: 30961007 PMCID: PMC6403992 DOI: 10.3390/polym10101082] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Revised: 09/25/2018] [Accepted: 09/25/2018] [Indexed: 12/29/2022] Open
Abstract
Nanobrick wall hybrid coating with super oxygen barrier properties were fabricated on polyethylene terephthalate (PET) film using a quadlayer (QL) assembly of polyelectrolytes and nanoplateles. A quadlayer assembly consists of three repeat units of polyacrylic acid (PAA), poly (dimethyl diallyl ammonium chloride) (PDDA) and layered α-zirconium phosphate (α-ZrP). PDDA with positive charges can assemble alternatively with both α-ZrP and PAA with negative charges to form nanobrick wall architectures on the surface of PET film via the electrostatic interaction. The lamellar structure of α-ZrP platelets and the dense QL assembly coating can greatly reduce the oxygen transmission rate (OTR) of PET film. Compared to pristine PET film, the OTR of PET (QL)19 is reduced from 57 to 0.87 cc/m²/day. Moreover, even with 19 QLs coating, PET (QL)19 composite film is still with an optical transparency higher than 90% and a haze lower than 10%. Therefore, the transparent PET (QL)n composite films with super oxygen barrier properties show great potential application in food packaging and flexible electronic packaging.
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Affiliation(s)
- Dongmei Han
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
- School of Chemical Engineering and Technology, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Yiqing Luo
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Qing Ju
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Xujing Xiao
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Min Xiao
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Naiyu Xiao
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
- Shenzhen Beauty Star Co., Ltd., Shenzhen 518112, China.
| | - Shou Chen
- Shenzhen Beauty Star Co., Ltd., Shenzhen 518112, China.
| | - Xiaohua Peng
- Shenzhen Beauty Star Co., Ltd., Shenzhen 518112, China.
| | - Shuanjin Wang
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
| | - Yuezhong Meng
- The Key Laboratory of Low-carbon Chemistry & Energy Conservation of Guangdong Province/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China.
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17
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Lu M, Huang S, Chen S, Ju Q, Xiao M, Peng X, Wang S, Meng Y. Transparent and super-gas-barrier PET film with surface coated by a polyelectrolyte and Borax. Polym J 2018. [DOI: 10.1038/s41428-017-0015-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [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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18
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Pan ZY, Dong DK, Chen SJ, Lu LY, Hu TT, Ju Q. In vivo reflectance confocal microscopy in daily practice: Image features correlated to histopathology. Skin Res Technol 2017; 24:223-228. [PMID: 29178413 DOI: 10.1111/srt.12417] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Z.-Y. Pan
- Department of Dermatology; Renji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - D.-K. Dong
- Department of Dermatology; Wuxi Second Affiliated Hospital of Nanjing Medical University; Wuxi Jiangsu China
| | - S.-J. Chen
- Department of Dermatology; Huashan Hospital; Fudan University; Shanghai China
| | - L.-Y. Lu
- Department of Dermatology; Renji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - T.-T. Hu
- Department of Dermatology; Renji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
| | - Q. Ju
- Department of Dermatology; Renji Hospital; School of Medicine; Shanghai Jiao Tong University; Shanghai China
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Abstract
BACKGROUND AND OBJECTIVE Idiopathic pulmonary fibrosis (IPF) has a poor prognosis in general; however, it is heterogeneous to detect relative biomarkers for predicting the disease progression. Serum biomarkers can be conveniently collected to detect and help to differentially diagnose IPF and predict IPF prognosis. This meta-analysis aimed to evaluate the use of serum surfactant proteins A and D (SP-A and SP-D) for differential diagnosis and prognosis of IPF. METHODS Relevant articles were searched in PubMed, Embase, and Chinese National Knowledge Infrastructure databases and reviewed by 2 independent readers. Standard mean difference (SMD) and 95% confidence interval (CI) were calculated to assess the difference in serum levels of SP-A/D among patients with IPF, when compared to patients with non-IPF interstitial lung disease (ILD), pulmonary infection, and healthy control. Hazard ratio (HR) and 95% CI were used to compare the relative risk of mortality. RESULTS Twenty-one articles (totalling 1289 IPF patients) were included in final meta-analysis. Serum SP-A levels were significantly higher in patients with IPF than in patients with non-IPF ILD (SMD: 1.108 [0.584, 1.632], P < .001), or pulmonary infection (SMD: 1.320 [0.999, 1.640], P < .001) and healthy controls (SMD: 2.802 [1.901, 3.702], P < .001). There was no significant difference in serum SP-D levels between patients with IPF and those with non-IPF ILD patients (SMD: 0.459 [-0.000, 0.919], P = .050). Serum SP-D levels were significantly higher in patients with IPF than in patients with pulmonary infection (SMD: 1.308 [0.813, 1.803], P < .001) and healthy controls (SMD: 2.235 [1.739, 2.731], P < .001). Risk of death in patients with IPF and elevated serum SP-A was increased 39% compared to patients with low SP-A groups. Elevated SP-D increased risk by 111% when compared to low SP-D. In acute exacerbation of IPF, serum SP-A/D were higher than those in stable stage. The comparisons and prognosis might be different in Asian and Caucasian patients. CONCLUSIONS Serum SP-A/D detection might be useful for differential diagnosis and prediction of survival in patients with IPF.
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Affiliation(s)
- Kai Wang
- Department of Healthcare Respiratory Medicine, Shandong Provincial Hospital Affiliated to Shandong University, Shandong University, Jinan, P.R. China
| | - Qing Ju
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Fourth Military Medical University, Xi’an Shanxi
| | - Jing Cao
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Fourth Military Medical University, Xi’an Shanxi
| | - Wenze Tang
- Department of Epidemiology and Biostatistics, Milken Institute School of Public Health, George Washington University, Washington, DC
| | - Jian Zhang
- Department of Pulmonary and Critical Care Medicine, Xijing Hospital, Fourth Military Medical University, Xi’an Shanxi
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Lin H, Xu Z, Zhang L, Yang X, Ju Q, Xue L, Zhou J, Zhuo S, Wu Y. Diketopyrrolopyrrole derivative functionalized graphene for high performance visible-light photodetectors. NEW J CHEM 2017. [DOI: 10.1039/c6nj04110h] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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]
Abstract
Although graphene has unique electronic and optical properties, its application in photodetectors is still limited due to its low optical absorption.
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Affiliation(s)
- Hongtao Lin
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Zichen Xu
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Lina Zhang
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Xinchun Yang
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Qing Ju
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Li Xue
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Jin Zhou
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Shuping Zhuo
- School of Chemical Engineering
- Shandong University of Technology
- Zibo 255049
- P. R. China
| | - Yishi Wu
- Beijing National Laboratory for Molecular Science(BNLMS)
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species
- CAS Key Laboratory of Photochemistry
- Institute of Chemistry
- Chinese Academy of Sciences
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Wang B, Yang R, Ju Q, Liu S, Zhang Y, Ma Y. Clinical effects of joint application of β-sodium aescinate and mannitol in treating early swelling after upper limb trauma surgery. Exp Ther Med 2016; 12:3320-3322. [PMID: 27882156 PMCID: PMC5103786 DOI: 10.3892/etm.2016.3743] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Accepted: 09/20/2016] [Indexed: 12/14/2022] Open
Abstract
The aim of the present study was to examine the clinical merits of joint application of β-sodium aescinate and mannitol for the treatment of early swelling of upper limb trauma after surgery. We verified whether the expression of serum aquaporin 1 (AQP-1) was involved in swelling mechanism. A total of 102 patients with swelling after upper limb trauma surgery were enrolled into the study and divided randomly into 3 groups (n=34 cases per group). Group A was treated with β-sodium aescinate; group B was treated with with mannitol and group C was treated with both β-sodium aescinate and mannitol. The expression level of AQP-1, and clinical effects and complications before and after treatment were compared§. The time of swelling subsidence in group C was significantly shorter than that of the other two groups and differences were statistically significant (P<0.05). The recovery ratio and total efficiency in group C were significantly higher than those in other two groups and differences were statistically significant (P<0.05). Three and seven days after treatment, the AQP-1 levels in group A and group C were decreased and AQP-1 level decreased further with time. Differences of comparison within groups were statistically significant (P<0.05), although the differences of comparison between the groups showed no statistical significance (P>0.05). We also compared the AQP-1 level in group B before and after treatment, and the differences were not statistically significant (P>0.05). When the complication incidence in the 3 groups was compared, no statistical significance was detected (P>0.05). We concluded that the joint use of β-sodium aescinate and mannitol in treating early swelling after upper limb trauma surgery produced satisfactory outcomes. This might be related to reduction of the AQP-1 level.
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Affiliation(s)
- Bin Wang
- Department of Orthopeadic Surgery, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
| | - Ruixiang Yang
- Department of Orthopeadic Surgery, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
| | - Qing Ju
- Department of Hospital Infection-Control, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
| | - Shaofeng Liu
- Patient Service Center, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
| | - Yongchun Zhang
- Department of Orthopeadic Surgery, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
| | - Yong Ma
- Department of Orthopeadic Surgery, The Third People's Hospital of Qingdao, Qingdao, Shandong 266041, P.R. China
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22
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Zuo CT, Ju Q. An analysis of clinical characteristics and prognosis for patients with serum alpha-fetoprotein-positive gastric cancer. Minerva Med 2015; 106:185-191. [PMID: 26418320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIM The aim of this analysis was to investigate the clinical characteristics and prognosis of patients with serum alpha-fetoproteinpositive gastric cancer (AFPGC) in order to improve the diagnosis and treatment. METHODS A retrospective analysis was performed on the clinical characteristics and survival data of patients with gastric cancer in our hospital between March 2007 and September 2012, to compare the clinical characteristics of patients with serum AFPGC to those of patients with serum AFP-negative gastric cancer. A Cox regression model was used to explore the prognosis factors for gastric cancer. RESULTS The 106 patients with serum AFPGC accounted for 8.5% (106/1253) of all the patients during the same period. There were poorer differentiation (64.2% vs. 54.0%), later clinical stage (83.1% vs. 48.6% at III+IV stage), larger tumor volume (78.3% vs. 57.9% with diameter>5 cm), and higher incidence of liver metastases (14.2% vs. 2.8%) and lymph node metastasis (76.4% vs. 52.7%) in patients with serum AFPGC than in those with serum AFP-negative gastric cancer (P<0.05). The 1-, 3-, and 5-year survival rates in patients with serum AFPGC were 52.8%, 31.3%, and 19.8%, respectively, with a median survival time of 14 months, and those in patients with serum alpha-fetoprotein-negative gastric cancer were 78.3%, 54.8%, and 36.8%, respectively, with a median survival time of 40 months. Multivariate Cox regression analysis showed that serum AFP positive (RR=2.70, 95% CI:1.50~4.87) was one of the risk factors of prognosis for patients with gastric cancer. CONCLUSION It is more malignant in patients with serum AFPGC than in those with serum alpha-fetoprotein-negative gastric cancer. There are later clinical stage, poorer differentiation, larger tumor volume, and higher incidence of metastasis to the liver and lymph nodes in patients with serum AFPGC, with low survival rate and poor prognosis.
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Affiliation(s)
- C T Zuo
- Department of General Surgery, The Third People's Hospital of Qingdao, Qingdao, China -
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23
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Chen W, Obermayer-Pietsch B, Hong JB, Melnik BC, Yamasaki O, Dessinioti C, Ju Q, Liakou AI, Al-Khuzaei S, Katsambas A, Ring J, Zouboulis CC. Acne-associated syndromes: models for better understanding of acne pathogenesis. J Eur Acad Dermatol Venereol 2010; 25:637-46. [DOI: 10.1111/j.1468-3083.2010.03937.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Zhao Y, Yu QY, Zhou B, Ju Q, Tang XX. [Allelopathic effect of Corallina pilulifera on Heterosigma akashiwo and its responses to UV-B irradiation]. Ying Yong Sheng Tai Xue Bao 2009; 20:2558-2562. [PMID: 20077719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
By the method of co-culture and using cell density as the main indicator, this paper studied the allelopathic effect of Corallina pilulifera on Heterosigma akashiwo and its responses to UV-B irradiation. Under normal condition, the fresh tissue and aqueous extracts of C. pilulifera had significant inhibitory effects on the growth of H. akashiwo (P < 0.05), indicating their allopathic effect on H. akashiwo, while the dry power and culture media filtrate of C. pilulifera had less effect (P > 0.05). After pre-treated with different dose UV-B radiation and then co-cultured with H. akashiwo, C. pilulifera had some changes in the allelopathic activity of its fresh tissue, dry powder, and aqueous extracts. High-dose UV-B radiation (3.0 J x m(-2)) induced the decrease of the allelopathic effect, whereas low-dose UV-B radiation (0.9 J x m(-2)) was in adverse (P < 0.05).
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Affiliation(s)
- Yan Zhao
- Laboratory of Marine Ecology, Ocean University of China, Qingdao 266003, Shandong, China.
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Ju Q, Wang Y, Liu S, Tang XX. [Effects of artificial seawater with different N/P ratio on early development of Laminaria japonica embryo spore]. Ying Yong Sheng Tai Xue Bao 2009; 20:1947-51. [PMID: 19947216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The embryo spores of Laminaria japonica were cultured in artificial seawater with different N/P ratio to observe their early development. 80 percent of the spores cultivated in whole-ingredient artificial seawater developed normally, but the time of spore germination and gametophyte formation was lagged significantly and the amount of female gametes was significantly higher than that of male gametes (P<0.001), as compared to the control cultivated in natural seawater. Artificial seawater with different N/P ratio showed different effects on the spore germination rate. The artificial seawater with N/P > 15 decreased the spore germination rate, while that without N or P inhibited the spore germination significantly (P<0.001). It was concluded that L. japonica spores could develop normally in artificial seawater, but their germination rate was affected by the seawater N/P. The deficiency of N or P in artificial seawater would lag the time of gametophyte formation and affect the differentiation ratio of female-male gametes.
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Affiliation(s)
- Qing Ju
- Laboratory of Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao, Shandong, China.
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26
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Liu S, Zhang Q, Wang Y, Ju Q, Tang X. The response of the early developmental stages of Laminaria japonica to enhanced ultraviolet-B radiation. Sci China C Life Sci 2008; 51:1129-36. [PMID: 19093088 DOI: 10.1007/s11427-008-0144-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2008] [Accepted: 07/08/2008] [Indexed: 11/25/2022]
Abstract
The responses of the early development of Laminaria japonica collected from Kiaochow Bay in China to enhanced ultraviolet-B radiation (UV-B, 280-320 nm) were studied in the laboratory. The low UV-B radiations (11.7-23.4 J x m(-2) x d(-1)) had no significant effects on zoospores attachment, but when the UV-B dose > 35.1 J x m(-2) x d(-1) the attachment decreased significantly compared with the control. Germination of embryospores was >93% under the low (11.7-35.1 J x m(-2) x d(-1)) doses, and in the range of 78.5%-88.5% under the high (46.8-70.2 J x m(-2) x d(-1)) UV-B doses, indicating a significant radiation effect. Under the higher UV-B exposure (35.1-70.2 J x m(-2) x d(-1)), all of the few gametophytes formed from embryospores died 120 h post-release. After exposure to the low UV-B radiation (11.7-23.4 J x m(-2) x d(-1)), the formation of sporophytes decreased and the female gametophyte clones increased compared with the control. However, the sex ratio and the relative growth of female gametophytes/sporophytes had not significantly changed. According to the results, enhanced UV-B radiation has a significant effect on the early development of L. japonica under laboratory conditions, suggesting that the UV-B radiation could not be overlooked as one of the important environmental factors influencing the ontogeny of macroalgae living in marine ecosystems.
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Affiliation(s)
- Su Liu
- Laboratory of Ecology, College of Marine Life Sciences, Ocean University of China, Qingdao, 266003, China
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Ju Q, Fimmel S, Stahlmann R, Zouboulis CC. 2,3,7,8-tetrachlorodibenzo-p-dioxin alters the differentiation of SZ95 sebocytes in vitro. Exp Dermatol 2008. [DOI: 10.1111/j.1600-0625.2008.00742_19.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Shen FB, Yang C, Lei N, Ju Q, Guo Y, Yi B, Luo ZX, Li HX, Wang L. [Effects of KH901, a tumor-specific oncolytic recombinant adenovirus, on antitumor and expressing GM-CSF in xenograft tumor models]. Sichuan Da Xue Xue Bao Yi Xue Ban 2007; 38:386-90. [PMID: 17593813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
OBJECTIVE Conditionally replicating oncolytic adenovirus KH901 was engineered with a genetically modified telomerase reverse transcriptase promoter and a cDNA of human granulocyte macrophage colony stimulating factor (GM-CSF). The objective of this study was to evaluate the anti-tumor efficacy and the selective GM-CSF expression of KH901 in xenograft tumor models. METHODS After intratumoral administration of KH901, the rates of Relative Tumor Growth (T/C%) and inhibition in Hep3B and LNcap xenograft models were measured for observing the KH901 antitumor efficacy. At various time points, the GM-CSF expression levels in tumor tissues and the blood of A549 xenograft model were determined by ELISA method. RESULTS In both Hep3B and LNcap xenograft models, KH901 showed the significantly higher restraint tumor rates at high dose (3 X 10(10) VP, P<0. 05) compared to 5-FU or Cisplatin. Even at the low dose (3 X 10(8) VP), the KH901 antitumor effect was similar to 5-FU (P>0. 05). In A549 xenograft model, the level of GM-CSF was continuously elevated and the peak values were found on day 7 in the blood and on day 11 in the tumor tissues. Then GM-CSF expression gradually reduced in both blood and tumor tissues. CONCLUSION KH901 can significantly inhibit the tumor growth in xenograft tumor model, and also express a high level of human GM-CSF in tumor tissue and release to circulating system to form a CM-CSF peak value in the blood.
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Affiliation(s)
- Fu-bing Shen
- National Chengdu Center of Safety Evaluation of Traditional Chinese Medicine, West China Hospital, Sichuan University, Chengdu 610041, China
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Du XL, Edelstein D, Dimmeler S, Ju Q, Sui C, Brownlee M. Hyperglycemia inhibits endothelial nitric oxide synthase activity by posttranslational modification at the Akt site. J Clin Invest 2001. [PMID: 11696579 DOI: 10.1172/jci200111235] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Endothelial nitric oxide synthase (eNOS) is activated by phosphorylation of serine 1177 by the protein kinase Akt/PKB. Since hyperglycemia-induced mitochondrial superoxide overproduction increases O-linked N-acetylglucosamine modification and decreases O-linked phosphorylation of the transcription factor Sp1, the effect of hyperglycemia and the hexosamine pathway on eNOS was evaluated. In bovine aortic endothelial cells, hyperglycemia inhibited eNOS activity 67%, and treatment with glucosamine had a similar effect. Hyperglycemia-associated inhibition of eNOS was accompanied by a twofold increase in O-linked N-acetylglucosamine modification of eNOS and a reciprocal decrease in O-linked serine phosphorylation at residue 1177. Both the inhibition of eNOS and the changes in its post-translational modifications were reversed by antisense inhibition of glutamine:fructose-6-phosphate amidotransferase, the rate-limiting enzyme of the hexosamine pathway, or by blocking mitochondrial superoxide overproduction with uncoupling protein-1 (UCP-1) or manganese superoxide dismutase (MnSOD). Immunoblot analysis of cells expressing myc-tagged wild-type human eNOS confirmed the reciprocal increase in O-linked N-acetylglucosamine and decrease in O-linked serine 1177 phosphorylation in response to hyperglycemia. In contrast, when myc-tagged human eNOS carried a mutation at the Akt phosphorylation site (Ser1177), O-linked N-acetylglucosamine modification was unchanged by hyperglycemia and phospho-eNOS was undetectable. Similar changes in eNOS activity and covalent modification were found in aortae from diabetic animals. Chronic impairment of eNOS activity by this mechanism may partly explain the accelerated atherosclerosis of diabetes.
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Affiliation(s)
- X L Du
- Diabetes Research Center, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Du XL, Edelstein D, Dimmeler S, Ju Q, Sui C, Brownlee M. Hyperglycemia inhibits endothelial nitric oxide synthase activity by posttranslational modification at the Akt site. J Clin Invest 2001; 108:1341-8. [PMID: 11696579 PMCID: PMC209429 DOI: 10.1172/jci11235] [Citation(s) in RCA: 595] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Endothelial nitric oxide synthase (eNOS) is activated by phosphorylation of serine 1177 by the protein kinase Akt/PKB. Since hyperglycemia-induced mitochondrial superoxide overproduction increases O-linked N-acetylglucosamine modification and decreases O-linked phosphorylation of the transcription factor Sp1, the effect of hyperglycemia and the hexosamine pathway on eNOS was evaluated. In bovine aortic endothelial cells, hyperglycemia inhibited eNOS activity 67%, and treatment with glucosamine had a similar effect. Hyperglycemia-associated inhibition of eNOS was accompanied by a twofold increase in O-linked N-acetylglucosamine modification of eNOS and a reciprocal decrease in O-linked serine phosphorylation at residue 1177. Both the inhibition of eNOS and the changes in its post-translational modifications were reversed by antisense inhibition of glutamine:fructose-6-phosphate amidotransferase, the rate-limiting enzyme of the hexosamine pathway, or by blocking mitochondrial superoxide overproduction with uncoupling protein-1 (UCP-1) or manganese superoxide dismutase (MnSOD). Immunoblot analysis of cells expressing myc-tagged wild-type human eNOS confirmed the reciprocal increase in O-linked N-acetylglucosamine and decrease in O-linked serine 1177 phosphorylation in response to hyperglycemia. In contrast, when myc-tagged human eNOS carried a mutation at the Akt phosphorylation site (Ser1177), O-linked N-acetylglucosamine modification was unchanged by hyperglycemia and phospho-eNOS was undetectable. Similar changes in eNOS activity and covalent modification were found in aortae from diabetic animals. Chronic impairment of eNOS activity by this mechanism may partly explain the accelerated atherosclerosis of diabetes.
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Affiliation(s)
- X L Du
- Diabetes Research Center, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Rabinovitch A, Suarez-Pinzon W, Strynadka K, Ju Q, Edelstein D, Brownlee M, Korbutt GS, Rajotte RV. Transfection of human pancreatic islets with an anti-apoptotic gene (bcl-2) protects beta-cells from cytokine-induced destruction. Diabetes 1999; 48:1223-9. [PMID: 10342808 DOI: 10.2337/diabetes.48.6.1223] [Citation(s) in RCA: 157] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Apoptosis has been identified as a mechanism of pancreatic islet beta-cell death in autoimmune diabetes. Proinflammatory cytokines are candidate mediators of beta-cell death in autoimmune diabetes, and these cytokines can induce beta-cell death by apoptosis. In the present study, we examined whether transfection of human islet beta-cells with an anti-apoptotic gene, bcl-2, can prevent cytokine-induced beta-cell destruction. Human islet beta-cells were transfected by a replication-defective herpes simplex virus (HSV) amplicon vector that expressed the bcl-2 gene (HSVbcl-2) and, as a control, the same HSV vector that expressed a beta-galactosidase reporter gene (HSVlac). Two-color immunohistochemical staining revealed that 95+/-3% of beta-cells transfected with HSVbcl-2 expressed Bcl-2 protein compared with 14+/-3% of beta-cells transfected with HSVlac and 19+/-4% of nontransfected beta-cells. The bcl-2-transfected beta-cells were fully protected from impaired insulin secretion and destruction resulting from incubation for 5 days with the cytokine combination of interleukin (IL)-1beta, tumor necrosis factor (TNF)-alpha, and interferon (IFN)-gamma. In addition, the bcl-2-transfected islet cells were significantly protected from cytokine-induced lipid peroxidation and DNA fragmentation. These results demonstrate that cytokine-induced beta-cell dysfunction and death involve mechanisms subject to regulation by an anti-apoptotic protein, Bcl-2. Therefore, bcl-2 gene therapy has the potential to protect human beta-cells in pancreatic islets, or islet grafts, from immune-mediated damage in type 1 diabetes.
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Affiliation(s)
- A Rabinovitch
- Department of Medicine, University of Alberta, Edmonton, Canada
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Ju Q, Edelstein D, Brendel MD, Brandhorst D, Brandhorst H, Bretzel RG, Brownlee M. Transduction of non-dividing adult human pancreatic beta cells by an integrating lentiviral vector. Diabetologia 1998; 41:736-9. [PMID: 9662059 DOI: 10.1007/s001250050977] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pancreatic islet cells are terminally differentiated endocrine cells and are refractory to stable infection by retroviral vectors, which require the breakdown of the nuclear membrane during cell division in order to insert the transgene into the host cell genome. Thus, attempts to render beta-cell allografts less immunogenic have had to rely on stable transfection of surrogate cells. Similarly, this problem has precluded the development of conditionally immortalized human beta cells for clinical allotransplantation. In this report, we demonstrate that adult human islet beta cells can be transduced by a new three-plasmid integrating lentiviral vector with an efficiency of 62 +/- 1.8 % at a multiplicity of infection (MOI) of 2.5 in vitro. This work makes genetic engineering of adult human pancreatic beta cells possible for the first time, allowing strategies to render beta-cell allografts non-immunogenic to be optimized and to creating conditionally immortalized human beta cells for clinical transplantation.
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Affiliation(s)
- Q Ju
- Diabetes Research Center, Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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Abstract
The transcription termination site for yeast RNA polymerase I requires not only an 11 bp binding site for Reb1p, but also about 46 bp of 5' flanking sequence. We propose that Reb1p bound to its site is part of a pause element, while the 5' flanking sequence contains a release element. Pausing requires little other than the DNA-binding domain of Reb1p and is not specific for polymerase I. The release element, however, can be polymerase specific. We propose a general model for eukaryotic transcription terminators in which termination occurs when a relatively nonspecific signal induces polymerase to pause in the context of a release element.
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Affiliation(s)
- W H Lang
- Basic Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington 98104-2092
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Abstract
We have measured the content of ribosomes, the rate of synthesis of ribosomal RNA, and the level of the mRNA for ribosomal proteins as a culture of Saccharomyces cerevisiae passes through the growth cycle. The transcription of both ribosomal RNA and ribosomal protein genes disappears at an unexpectedly early stage in the growth cycle, accompanied by a decline in the total RNA content of the culture by nearly 50% and a decline in the number of ribosomes per cell to less than 25% of the maximum value. During this time the cells continue to grow through more than two doublings, initially at the normal log growth rate, which then decline gradually for several hours. The data suggest that the cell can sense an unfavorable change within the medium and responds by employing regulation of both synthesis and degradation of its ribosomes. We conclude that the cell regulates ribosome synthesis and content according to its estimate of the potential for growth.
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Affiliation(s)
- Q Ju
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, NY 10461
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Abstract
The REB1 gene encodes a DNA-binding protein (Reb1p) that is essential for growth of the yeast Saccharomyces cerevisiae. Reb1p binds to sites within transcriptional control regions of genes transcribed by either RNA polymerase I or RNA polymerase II. The sequence of REB1 predicts a protein of 809 amino acids. To define the DNA-binding domain of Reb1p, a series of 5' and 3' deletions within the coding region was constructed in a bacterial expression vector. Analysis of the truncated Reb1p proteins revealed that nearly 400 amino acids of the C-terminal portion of the protein are required for maximal DNA-binding activity. To further define the important structural features of Reb1p, the REB1 homolog from a related yeast, Kluyveromyces lactis, was cloned by genetic complementation. The K. lactis REB1 gene supports active growth of an S. cerevisiae strain whose REB1 gene has been deleted. The Reb1p proteins of the two organisms generate almost identical footprints on DNA, yet the K. lactis REB1 gene encodes a polypeptide of only 595 amino acids. Comparison of the two Reb1p sequences revealed that within the region necessary for the binding of Reb1p to DNA were two long regions of nearly perfect identity, separated in the S. cerevisiae Reb1p by nearly 150 amino acids but in the K. lactis Reb1p by only 40 amino acids. The first includes a 105-amino-acid region related to the DNA-binding domain of the myb oncoprotein; the second bears a faint resemblance to myb. The hypothesis that the DNA-binding domain of Reb1p is formed from these two conserved regions was confirmed by deletion of as many as 90 amino acids between them, with little effect on the DNA-binding ability of the resultant protein. We suggest that the DNA-binding domain of Reb1p is made up of two myb-like regions that, unlike myb itself, are separated by as many as 150 amino acids. Since Reb1p protects only 15 to 20 nucleotides in a chemical or enzymatic footprint assay, the protein must fold such that the two components of the binding site are adjacent.
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Affiliation(s)
- B E Morrow
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York 10461
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Schultz MC, Brill SJ, Ju Q, Sternglanz R, Reeder RH. Topoisomerases and yeast rRNA transcription: negative supercoiling stimulates initiation and topoisomerase activity is required for elongation. Genes Dev 1992; 6:1332-41. [PMID: 1321070 DOI: 10.1101/gad.6.7.1332] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Previous work has shown that rRNA synthesis is strongly inhibited in yeast top1-top2 double mutants. Here, we show that inactivation of yeast topoisomerases can have paradoxical effects on transcription by RNA polymerase I. For example, transcription of ribosomal minigenes on extrachromosomal plasmids is greatly stimulated in top1-top2 cells while accumulation of full-length endogenous rRNA is strongly inhibited. We present evidence for a mechanism that can partly account for these opposing effects on transcription. On the one hand, transcription initiation can be stimulated owing to an accumulation of negative superhelicity because polymerase I prefers to initiate on negatively supercoiled templates. Conversely, synthesis of full-length rRNA is inhibited owing to the fact that chain elongation requires a DNA relaxing activity.
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Affiliation(s)
- M C Schultz
- Basic Sciences Division, Hutchinson Cancer Research Center, Seattle, Washington 98104
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Morrow BE, Ju Q, Warner JR. Purification and characterization of the yeast rDNA binding protein REB1. J Biol Chem 1990; 265:20778-83. [PMID: 2249986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
In the yeast Saccharomyces cerevisiae, the ribosomal RNA genes are present in a single tandem array. A transcriptional enhancer element lies within the spacer region between each rRNA gene, 2.2 kilobases upstream from the transcription initiation site. We have identified previously two proteins, REB1 and REB2, that bind to specific sites within the enhancer (Morrow, B. E., Johnson, S. P., and Warner, J. R. (1989) J. Biol. Chem. 264, 9061-9068). REB1 binds also to a second, higher affinity site near the promoter, 210 base pairs upstream from the initiation site. This report describes the purification and further characterization of REB1. REB1 is a single polypeptide with an apparent molecular mass of 125,000 Da that binds to the sequence CCGGGTAA. It has been found to bind also within transcriptional control regions of several genes transcribed by RNA polymerase II, such as the UASG of the GAL1-GAL10 spacer. Immunoprecipitation analysis demonstrated that REB1 is phosphorylated.
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Affiliation(s)
- B E Morrow
- Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York 10461
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