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Abaie E, Kumar M, Kumar N, Sun Y, Guelfo J, Shen Y, Reible D. Application of β-Cyclodextrin Adsorbents in the Removal of Mixed Per- and Polyfluoroalkyl Substances. Toxics 2024; 12:264. [PMID: 38668487 PMCID: PMC11054934 DOI: 10.3390/toxics12040264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/28/2024] [Accepted: 03/28/2024] [Indexed: 04/29/2024]
Abstract
The extensive use of per- and polyfluoroalkyl substances (PFASs) in industrial consumer products has led to groundwater contamination, raising concerns for human health and the environment. These persistent chemicals exist in different forms with varying properties, which makes their removal challenging. In this study, we assessed the effectiveness of three different β-cyclodextrin (β-CD) adsorbents at removing a mixture of PFASs, including anionic, neutral, and zwitterionic compounds, at neutral pH. We calculated linear partition coefficient (Kd) values to quantify the adsorption affinity of each PFAS. β-CD polymers crosslinked with hexamethylene diisocyanate (β-CD-HDI) and epichlorohydrin (β-CD-EPI) displayed some adsorption of PFASs. Benzyl chloride β-CD (β-CD-Cl), an adsorbent that had not been previously reported, was also synthesized and tested for PFAS adsorption. β-CD-Cl exhibited higher PFAS adsorption than β-CD-HDI and β-CD-EPI, with log Kd values ranging from 1.9 L·g-1 to 3.3 L·g-1. β-CD-Cl displayed no affinity for zwitterionic compounds, as opposed to β-CD-HDI and β-CD-EPI, which removed N-dimethyl ammonio propyl perfluorohexane sulfonamide (AmPr-FHxSA). A comparison between Kd values and the log Kow of PFAS confirmed the significant role of hydrophobic interactions in thee adsorption mechanism. This effect was stronger in β-CD-Cl, compared to β-CD-HDI and β-CD-EPI. While no effect of PFAS charge was observed in β-CD-Cl, some influence of charge was observed in β-CD-HDI and β-CD-EPI, with less negative compounds being more adsorbed. The adsorption of PFASs by β-CD-Cl was similar in magnitude to that of other adsorbents proposed in literature. However, it offers the advantage of not containing fluorine, unlike many commonly proposed adsorbents.
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Affiliation(s)
- Elham Abaie
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Manish Kumar
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Naveen Kumar
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Yilang Sun
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Jennifer Guelfo
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Yuexiao Shen
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Danny Reible
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
- Chemical Engineering Department, Texas Tech University, Lubbock, TX 79409, USA
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Tang H, Wang H, Fang Y, Zhu JY, Yin J, Shen YX, Zeng ZC, Jiang DX, Hou YY, Du M, Lian CH, Zhao Q, Jiang HJ, Gong L, Li ZG, Liu J, Xie DY, Li WF, Chen C, Zheng B, Chen KN, Dai L, Liao YD, Li K, Li HC, Zhao NQ, Tan LJ. Neoadjuvant chemoradiotherapy versus neoadjuvant chemotherapy followed by minimally invasive esophagectomy for locally advanced esophageal squamous cell carcinoma: a prospective multicenter randomized clinical trial. Ann Oncol 2023; 34:163-172. [PMID: 36400384 DOI: 10.1016/j.annonc.2022.10.508] [Citation(s) in RCA: 26] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 09/29/2022] [Accepted: 10/13/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Neoadjuvant therapy is recommended for locally advanced esophageal cancer, but the optimal strategy remains unclear. We aimed to evaluate the safety and efficacy of neoadjuvant chemoradiotherapy (nCRT) versus neoadjuvant chemotherapy (nCT) followed by minimally invasive esophagectomy (MIE) for locally advanced esophageal squamous cell carcinoma (ESCC). PATIENTS AND METHODS Eligible patients staged as cT3-4aN0-1M0 ESCC were randomly assigned (1 : 1) to the nCRT or nCT group stratified by age, cN stage, and centers. The chemotherapy, based on paclitaxel and cisplatin, was administered to both groups, while concurrent radiotherapy was added for the nCRT group; then MIE was carried out. The primary endpoint was 3-year overall survival. This study is registered with ClinicalTrials.gov (NCT03001596). RESULTS A total of 264 patients were eligible for the intention-to-treat analysis. By 30 November 2021, 121 deaths had occurred. The median follow-up was 43.9 months (interquartile range 36.6-49.3 months). The overall survival in the intention-to-treat population was comparable between the nCRT and nCT strategies [hazard ratio (HR) 0.82, 95% confidence interval (CI) 0.58-1.18; P = 0.28], with a 3-year survival rate of 64.1% (95% CI 56.4% to 72.9%) versus 54.9% (95% CI 47.0% to 64.2%), respectively. There were also no differences in progression-free survival (HR 0.83, 95% CI 0.59-1.16; P = 0.27) and recurrence-free survival (HR 1.07, 95% CI 0.71-1.60; P = 0.75), although the pathological complete response in the nCRT group (31/112, 27.7%) was significantly higher than that in the nCT group (3/104, 2.9%; P < 0.001). Besides, a trend of lower risk of recurrence was observed in the nCRT group (P = 0.063), while the recurrence pattern was similar (P = 0.802). CONCLUSIONS NCRT followed by MIE was not associated with significantly better overall survival than nCT among patients with cT3-4aN0-1M0 ESCC. The results underscore the pending issue of the best strategy of neoadjuvant therapy for locally advanced bulky ESCC.
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Affiliation(s)
- H Tang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai; Cancer Center, Zhongshan Hospital, Fudan University, Shanghai
| | - H Wang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai; Cancer Center, Zhongshan Hospital, Fudan University, Shanghai
| | - Y Fang
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai; Cancer Center, Zhongshan Hospital, Fudan University, Shanghai
| | - J Y Zhu
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai; Department of Radiotherapy, Zhongshan Hospital, Fudan University, Shanghai
| | - J Yin
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai; Cancer Center, Zhongshan Hospital, Fudan University, Shanghai
| | - Y X Shen
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai; Cancer Center, Zhongshan Hospital, Fudan University, Shanghai
| | - Z C Zeng
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai; Department of Radiotherapy, Zhongshan Hospital, Fudan University, Shanghai
| | - D X Jiang
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai; Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai
| | - Y Y Hou
- Cancer Center, Zhongshan Hospital, Fudan University, Shanghai; Department of Pathology, Zhongshan Hospital, Fudan University, Shanghai
| | - M Du
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing
| | - C H Lian
- Department of General Surgery, Heping Hospital Affiliated to Changzhi Medical College, Changzhi
| | - Q Zhao
- Department of General Surgery, Heping Hospital Affiliated to Changzhi Medical College, Changzhi
| | - H J Jiang
- Department of Minimally Invasive Esophageal Surgery, Tianjin Medical University Cancer Institute and Hospital, Tianjin
| | - L Gong
- Department of Esophageal Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin
| | - Z G Li
- Department of Thoracic Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai
| | - J Liu
- Department of Radiotherapy, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai
| | - D Y Xie
- Department of Thoracic Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou
| | - W F Li
- Department of Radiation Oncology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou
| | - C Chen
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou
| | - B Zheng
- Department of Thoracic Surgery, Fujian Medical University Union Hospital, Fuzhou
| | - K N Chen
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), The First Department of Thoracic Surgery, Peking University Cancer Hospital and Institute, Peking University School of Oncology, Beijing
| | - L Dai
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), The First Department of Thoracic Surgery, Peking University Cancer Hospital and Institute, Peking University School of Oncology, Beijing
| | - Y D Liao
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan
| | - K Li
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan
| | - H C Li
- Department of Thoracic Surgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai
| | - N Q Zhao
- Department of Biostatistics, School of Public Health, Fudan University, Shanghai, China
| | - L J Tan
- Department of Thoracic Surgery, Zhongshan Hospital, Fudan University, Shanghai; Cancer Center, Zhongshan Hospital, Fudan University, Shanghai.
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Cestellos-Blanco S, Chan RR, Shen YX, Kim JM, Tacken TA, Ledbetter R, Yu S, Seefeldt LC, Yang P. Photosynthetic biohybrid coculture for tandem and tunable CO 2 and N 2 fixation. Proc Natl Acad Sci U S A 2022; 119:e2122364119. [PMID: 35727971 PMCID: PMC9245687 DOI: 10.1073/pnas.2122364119] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 04/25/2022] [Indexed: 11/18/2022] Open
Abstract
Solar-driven bioelectrosynthesis represents a promising approach for converting abundant resources into value-added chemicals with renewable energy. Microorganisms powered by electrochemical reducing equivalents assimilate CO2, H2O, and N2 building blocks. However, products from autotrophic whole-cell biocatalysts are limited. Furthermore, biocatalysts tasked with N2 reduction are constrained by simultaneous energy-intensive autotrophy. To overcome these challenges, we designed a biohybrid coculture for tandem and tunable CO2 and N2 fixation to value-added products, allowing the different species to distribute bioconversion steps and reduce the individual metabolic burden. This consortium involves acetogen Sporomusa ovata, which reduces CO2 to acetate, and diazotrophic Rhodopseudomonas palustris, which uses the acetate both to fuel N2 fixation and for the generation of a biopolyester. We demonstrate that the coculture platform provides a robust ecosystem for continuous CO2 and N2 fixation, and its outputs are directed by substrate gas composition. Moreover, we show the ability to support the coculture on a high-surface area silicon nanowire cathodic platform. The biohybrid coculture achieved peak faradaic efficiencies of 100, 19.1, and 6.3% for acetate, nitrogen in biomass, and ammonia, respectively, while maintaining product tunability. Finally, we established full solar to chemical conversion driven by a photovoltaic device, resulting in solar to chemical efficiencies of 1.78, 0.51, and 0.08% for acetate, nitrogenous biomass, and ammonia, correspondingly. Ultimately, our work demonstrates the ability to employ and electrochemically manipulate bacterial communities on demand to expand the suite of CO2 and N2 bioelectrosynthesis products.
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Affiliation(s)
- Stefano Cestellos-Blanco
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
- Center for the Utilization of Biological Engineering in Space, University of California, Berkeley, CA 94720
| | - Rachel R. Chan
- Department of Chemistry, University of California, Berkeley, CA 94720
| | - Yue-xiao Shen
- Center for the Utilization of Biological Engineering in Space, University of California, Berkeley, CA 94720
- Department of Chemistry, University of California, Berkeley, CA 94720
| | - Ji Min Kim
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
- Center for the Utilization of Biological Engineering in Space, University of California, Berkeley, CA 94720
| | - Tom A. Tacken
- Department of Chemistry, University of California, Berkeley, CA 94720
- Department of Applied Physics, Eindhoven University of Technology, Eindhoven, 5600 MB, The Netherlands
| | - Rhesa Ledbetter
- Center for the Utilization of Biological Engineering in Space, University of California, Berkeley, CA 94720
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT 84322
| | - Sunmoon Yu
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
| | - Lance C. Seefeldt
- Center for the Utilization of Biological Engineering in Space, University of California, Berkeley, CA 94720
- Department of Chemistry and Biochemistry, Utah State University, Logan, UT 84322
| | - Peidong Yang
- Department of Materials Science and Engineering, University of California, Berkeley, CA 94720
- Center for the Utilization of Biological Engineering in Space, University of California, Berkeley, CA 94720
- Department of Chemistry, University of California, Berkeley, CA 94720
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
- Kavli Energy Nanosciences Institute, Berkeley, CA 94720
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Shen Y. Beating natural proteins at filtering water. Science 2022; 376:698-699. [PMID: 35549431 DOI: 10.1126/science.abo2953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Artificial fluorous channels outperform aquaporins in water permeation.
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Affiliation(s)
- Yuexiao Shen
- Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, TX 79409, USA
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Zeng Y, Pan QB, Shen YX, Ren H. [Neutralization of interleukin-6 alleviates acute liver injury in mice]. Zhonghua Gan Zang Bing Za Zhi 2020; 28:509-514. [PMID: 32660181 DOI: 10.3760/cma.j.cn501113-20200224-00066] [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 study the role of interleukin 6 (IL-6) in the occurrence and development of acute liver injury. Methods: Twelve C57BL/6 male mice without specific pathogens were randomly divided into a control group and an acute liver injury model group, with six mice in each group. Control and model group were injected with an equal volume (dosage of 10 mg/kg) of phosphate-buffered saline (PBS) and concanavalin A (ConA) into the tail vein, respectively. Samples were collected at 6 h for liver HE staining. Transaminase assay was used to determine the success of the induction model. The expression of IL-6, IL-17, IL-1β, interferon (IFN) γ and tumor necrosis factor α were screened by quantitative fluorescence PCR (qPCR). The expressional condition of IL-6 and IFNγ were measured by enzyme-linked immunosorbent assay (ELISA). Subsequently, three control groups and three IL-6 neutralizing antibody groups were established for acute liver injury, respectively. Equal volumes of PBS or IL-6 neutralizing antibody (100 μg/body) were injected prior 30 minutes, followed by injection of ConA (10 mg/kg) into the tail vein. Blood sampled from eye and liver tissue were fetched at 6 h. Liver tissues were stained with HE and serum alanine aminotransferase (ALT) was determined. An independent sample T-test was used for data comparison. Results: Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) of the model group was significantly higher than control group [ALT: (2 618.99 ± 188.08) U/L and (43.34 ± 5.02) U/L, t = -13.69, P = 0.001; AST: (942.48 ± 150.44) U/L and (57.80 ± 4.84) U/L, t = -5.878, P = 0.01]. Liver HE staining showed that the structure of hepatocyte cord was disordered, the cytoplasm of hepatocyte was lightly stained, and large necrotic foci were gradually formed, accompanied by lymphocyte infiltration, and then a mouse model of acute liver injury was successfully established. Protein levels of IL-6 and IFN, and mRNA of the model group were significantly up-regulated, as compared to control group. IL-6 mRNA expression of the model group was increased 73.7 times that of the control group (t =-6.218, P < 0.001), and the serum IL-6 expression level was also higher than that of the control group (18 537.02 ± 92.57) pg/ml (t = -199.782, P < 0.001). IFNγ mRNA was 108.4 times higher than that of the control the group (t = -4.413, P = 0.003), and serum IFNγ concentration of the model group was also higher than the control group (12 068.30 ± 288.43) pg/ml (t = -41.748, P < 0.001). Among them, IL-6 level was obviously increased, suggesting that it could participate in the occurrence and development of liver injury. IL-6 neutralizing antibody was injected into the tail vein. ALT level of IL-6 neutralizing antibody was significantly lower than acute liver injury control group [(167.41 ± 47.80) U/L and (1 520.34 ± 190.21) U/L, t = 6.899, P = 0.015]. Liver tissue HE staining showed that hepatocyte necrosis and the number of necrotic foci was significantly alleviated after blocking serum IL-6.Immunohistochemical results showed that the expression of activated caspase3 and hepatocyte apoptosis in the IL-6 neutralizing antibody group was decreased. Conclusion: Neutralizing IL-6 can significantly reduce acute liver injury caused by concanavalin A.
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Affiliation(s)
- Y Zeng
- Department of Infectious Diseases, Institute for Viral Hepatitis, the Key Laboratory of Molecular Biology for Infectious Diseases, Chinese Ministry of Education, the Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Q B Pan
- Department of Infectious Diseases, Institute for Viral Hepatitis, the Key Laboratory of Molecular Biology for Infectious Diseases, Chinese Ministry of Education, the Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Y X Shen
- Department of Infectious Diseases, Institute for Viral Hepatitis, the Key Laboratory of Molecular Biology for Infectious Diseases, Chinese Ministry of Education, the Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - H Ren
- Department of Infectious Diseases, Institute for Viral Hepatitis, the Key Laboratory of Molecular Biology for Infectious Diseases, Chinese Ministry of Education, the Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
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Xiao K, Han B, Sun J, Tan J, Yu J, Liang S, Shen Y, Huang X. Stokes Shift and Specific Fluorescence as Potential Indicators of Organic Matter Hydrophobicity and Molecular Weight in Membrane Bioreactors. Environ Sci Technol 2019; 53:8985-8993. [PMID: 31189066 DOI: 10.1021/acs.est.9b02114] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hydrophobicity and molecular weight (MW) are two fundamental properties of dissolved organic matter (DOM) in wastewater treatment systems. This study proposes fluorescence Stokes shift and specific fluorescence intensity (SFI) as novel indicators of hydrophobicity and MW. These indicators originate from the energy gap and photon efficiency of the fluorescence process and can be readily extracted from a fluorescence excitation-emission matrix (EEM). The statistical linkages between these indicators and hydrophobicity/MW were explored through investigation of DOM across 10 full-scale membrane bioreactors treating municipal wastewater. Stokes shift was found to exhibit a general rule among the hydrophobicity components in the order of hydrophilic substances (HIS) < hydrophobic acids (HOA) < hydrophobic bases (HOB). The Stokes shift of 1.2 μm-1 is a critical border, above which the relative fluorescence correlated significantly with the HOA-related content (Pearson's r = 0.8). With regard to MW distribution (<1, 1-10, 10-100, and >100 kDa), SFI was found to be the most sensitive to the change of MW of <1 kDa proportion, especially at the excitation/emission wavelengths of 200-320/310-550 nm (r > 0.9). Hydrophobicity-related π conjugation and MW-dependent light exposure might be responsible for the correlations. These fluorescence indicators may be useful for convenient monitoring of DOM in wastewater treatment systems.
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Affiliation(s)
- Kang Xiao
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Bingjun Han
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Jianyu Sun
- National Institute of Clean and Low-Carbon Energy , Beijing 102211 , People's Republic of China
| | - Jihua Tan
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Jinlan Yu
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Shuai Liang
- College of Environmental Science and Engineering , Beijing Forestry University , Beijing 100083 , People's Republic of China
| | - Yuexiao Shen
- Department of Chemistry , University of California, Berkeley , Berkeley , California 94720 , United States
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Shen L, Jin Z, Xu W, Jiang X, Shen YX, Wang Y, Lu Y. Enhanced Treatment of Anionic and Cationic Dyes in Wastewater through Live Bacteria Encapsulation Using Graphene Hydrogel. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01950] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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)
- Liang Shen
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, The Key Lab for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen 361005, China
| | - Ziheng Jin
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, The Key Lab for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen 361005, China
| | - Wenhao Xu
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, The Key Lab for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen 361005, China
| | - Xia Jiang
- College of Architecture and Environment, Sichuan University, Chengdu 610065, China
| | - Yue-xiao Shen
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Department of Civil, Environmental, and Construction Engineering, Texas Tech University, Lubbock, Texas 79409, United States
| | - Yuanpeng Wang
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, The Key Lab for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen 361005, China
| | - Yinghua Lu
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, The Key Lab for Synthetic Biotechnology of Xiamen City, Xiamen University, Xiamen 361005, China
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Liu K, Shen YX, Ling N, Lei Y, Hu P, Ren H, Chen M. [Changes and clinical significance of γδT cells in peripheral blood of patients with chronic hepatitis B during pegylated interferon α-2a treatment]. Zhonghua Gan Zang Bing Za Zhi 2018; 26:365-370. [PMID: 29996205 DOI: 10.3760/cma.j.issn.1007-3418.2018.05.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To observe the changes of γδT cells in the peripheral blood of patients with chronic hepatitis B (CHB) during pegylated interferon α-2a treatment, and to analyze the correlation between clinical indicators and curative effects. Methods: Peripheral blood of hepatitis B e antigen (HBeAg)-positive CHB patients were collected at different time points of Peg-IFNα-2a treatment, including 17 patients at 0 weeks, 20 patients at 12 weeks, 20 patients at 24 weeks, and 16 patients at 48 weeks. From these 11 patients, blood samples were frequently observed at 0, 12, 24, and 48 weeks of treatment. The frequencies of γδT and its subpopulation cells Vδ1T, Vδ2T, effector memory γδT (γδTem), central memory γδT (γδTcm), initial γδT (γδTnaive) and terminal differentiation effect γδT (γδTeff) cells in peripheral blood were detected by flow cytometry. Liver function, serum HBV markers and HBV DNA levels were measured simultaneously. SPSS 23.0 statistical software was used to analyze the differences in cell proportions at each treatment time point, and the correlation between cell proportions and alanine aminotransferase (ALT), HBsAg, HBeAg or HBV DNA levels. In addition, the correlation between the proportions of γδT and its subpopulation cells and the response to Peg-IFNα-2a treatment in the 11 patients with continuous follow-up were analyzed. Results: The percentage of γδT and Vδ2T cells in peripheral blood of patients with CHB decreased gradually during the period of 0-48 weeks of Peg-IFNα-2a treatment. The percentages of γδT cells and Vδ2T cells at 48 weeks were 6.89% (5%, 8.15%), 4.61% (2.16%, 6.50%), respectively; significantly lower than the 0 week [12.5% (7.73%, 19%), 6.59% (3.86%, 13.62%)], the differences were statistically significant (P < 0.05). The proportions of Vδ1T, γδTem, γδTcm, γδTnaive, or γδTeff subpopulations were not statistically different at each time points (all P > 0.05). At the same time, the levels of ALT, HBsAg, HBeAg or HBV DNA were positively correlated with the ratio of γδT or Vδ2T cells (P < 0.05). Among the 11 patients with continuous followed- up, the proportion of γδTem cells in responders was significantly lower than that of non-responders at each time points, and the difference was statistically significant (P < 0.05). There was no statistically significant difference between the two groups (all P > 0.05). Conclusion: The proportion of γδT cells in the course of CHB treatment with Peg-IFNα-2a reduces the liver inflammation by decreasing the replication of HBV virus. Chronic hepatitis B patients with a lower proportion of effector memory (γδTem) cells may be more likely to get better response with Peg-IFNα-2a.
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Affiliation(s)
- K Liu
- Department of Infectious Diseases, Institute for Viral Hepatitis, The Second Affiliated Hospital, Chongqing Medical University, Key Laboratory of Molecular Biology for Infectious Diseases (Ministry of Education), Chongqing 400010, China
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Xiao K, Shen Y, Liang S, Tan J, Wang X, Liang P, Huang X. Characteristic Regions of the Fluorescence Excitation-Emission Matrix (EEM) To Identify Hydrophobic/Hydrophilic Contents of Organic Matter in Membrane Bioreactors. Environ Sci Technol 2018; 52:11251-11258. [PMID: 30189132 DOI: 10.1021/acs.est.8b02684] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This study systematically investigated the correlations between fluorescence distributions characterized by the excitation-emission matrix (EEM) and hydrophobic/hydrophilic composition of dissolved organic matter (DOM) in membrane bioreactors (MBRs). On the basis of samples from 10 full-scale MBRs, we performed point-to-point comparisons among different components using an EEM fluorescence quotient (FQ) method and obtained a hydrophobic/hydrophilic fluorophore distribution map via Wilcoxon signed rank test. Hydrophobic acids/bases (HOA/HOB) concentrated in the low-wavelength region [excitation wavelength (Ex) < 235 nm], while hydrophilic substances (HIS) were enriched in the region of Ex > 235 nm [especially with emission wavelength (Em) = 300-360 nm]. Quantitatively, EEM regional contribution to whole wavelength fluorescence was found to significantly correlate with the hydrophobic/hydrophilic proportions of DOM, with Pearson's coefficients of 0.94 and 0.78 ( p < 0.01) for HOA and HIS, respectively. We established a linear regression model showing the HOA proportion as a function of the EEM regional contribution at (Ex, Em) = (200-285, 340-465 nm), with R2 = 0.876, which was validated via leave-one-out cross-validation and Monte Carlo simulation. This study shows a statistically hydrophobicity-dependent fluorescence property across different MBRs, and it might be applied to provide a quick estimation of hydrophobic/hydrophilic composition of DOM in wastewater treatment systems based on EEM monitoring.
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Affiliation(s)
- Kang Xiao
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Yuexiao Shen
- Department of Chemistry , University of California, Berkeley , Berkeley , California 94720 , United States
| | - Shuai Liang
- College of Environmental Science and Engineering , Beijing Forestry University , Beijing 100083 , People's Republic of China
| | - Jihua Tan
- College of Resources and Environment , University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Xiaomao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Peng Liang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , People's Republic of China
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , People's Republic of China
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Schantz AB, Ren T, Pachalla A, Shen Y, Hickey RJ, Kumar M. Macromol. Chem. Phys. 9/2018. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201870023] [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)
- A. Benjamin Schantz
- Department of Chemical Engineering; The Pennsylvania State University; 125 Greenberg Complex University Park PA 16802 USA
| | - Tingwei Ren
- Department of Chemical Engineering; The Pennsylvania State University; 125 Greenberg Complex University Park PA 16802 USA
| | - Abhishek Pachalla
- Department of Chemical Engineering; The Pennsylvania State University; 125 Greenberg Complex University Park PA 16802 USA
| | - Yuexiao Shen
- Department of Chemical Engineering; The Pennsylvania State University; 125 Greenberg Complex University Park PA 16802 USA
| | - Robert J. Hickey
- Department of Materials Science and Engineering; The Pennsylvania State University; 403 Steidle Building University Park PA 16802 USA
| | - Manish Kumar
- Department of Chemical Engineering; The Pennsylvania State University; 125 Greenberg Complex University Park PA 16802 USA
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Schantz AB, Ren T, Pachalla A, Shen Y, Hickey RJ, Kumar M. Porous Vesicles with Extrusion‐Tunable Permeability and Pore Size from Mixed Solutions of PEO–PPO–PEO Triblock Copolymers. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201700620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- A. Benjamin Schantz
- Department of Chemical Engineering The Pennsylvania State University 125 Greenberg Complex University Park PA 16802 USA
| | - Tingwei Ren
- Department of Chemical Engineering The Pennsylvania State University 125 Greenberg Complex University Park PA 16802 USA
| | - Abhishek Pachalla
- Department of Chemical Engineering The Pennsylvania State University 125 Greenberg Complex University Park PA 16802 USA
| | - Yuexiao Shen
- Department of Chemical Engineering The Pennsylvania State University 125 Greenberg Complex University Park PA 16802 USA
| | - Robert J. Hickey
- Department of Materials Science and Engineering The Pennsylvania State University 403 Steidle Building University Park PA 16802 USA
| | - Manish Kumar
- Department of Chemical Engineering The Pennsylvania State University 125 Greenberg Complex University Park PA 16802 USA
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Ren T, Erbakan M, Shen Y, Barbieri E, Saboe P, Feroz H, Yan H, McCuskey S, Hall JF, Schantz AB, Bazan GC, Butler PJ, Grzelakowski M, Kumar M. Membrane Protein Insertion into and Compatibility with Biomimetic Membranes. ACTA ACUST UNITED AC 2017; 1:e1700053. [DOI: 10.1002/adbi.201700053] [Citation(s) in RCA: 19] [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] [Received: 03/08/2017] [Revised: 05/07/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Tingwei Ren
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
| | - Mustafa Erbakan
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
- Department of Biosystem Engineering Bozok University Yozgat 66000 Turkey
| | - Yuexiao Shen
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
| | - Eduardo Barbieri
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
- Departamento de Engenharia Química Universidade Federal do Rio de Janeiro Centro de Tecnologia Bloco E Rio de Janeiro RJ CEP 21941‐909 Brazil
| | - Patrick Saboe
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
| | - Hasin Feroz
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
| | - Hengjing Yan
- Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Samantha McCuskey
- Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Joseph F. Hall
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
| | - A. Benjamin Schantz
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
| | - Guillermo C. Bazan
- Department of Chemistry and Biochemistry University of California Santa Barbara CA 93106 USA
| | - Peter J. Butler
- Department of Biomedical Engineering The Pennsylvania State University University Park PA USA 16802
| | | | - Manish Kumar
- Department of Chemical Engineering The Pennsylvania State University University Park PA 16802 USA
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Abstract
Chronic periodontitis is a progressive, infectious inflammation disease, caused by the dysbiosis of oral resident flora, leading to the destruction of periodontium. The onset of pathogenic microorganisms is the etiological factor of periodontitis, while the immuno-inflammatory response affects the progression of the disease. Under chronic periodontitis, oxidative stress occurs when excessive reactive oxygen species are produced and exceed the compensative capacity of the organism. Oxidative stress leads to the destruction of periodontium, in a direct way(damaging the biomolecule) or an indirect way(enhancing the produce of inflammatory cytokine and destructive enzymes). Therefore, as the antagonist of the reactive oxygen species, antioxidants may be helpful to treat the chronic periodontitis. This paper reviewed relevant literatures about the destructive role of excessive reactive oxygen species and protective role of antioxidants in chronic periodontitis.
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Affiliation(s)
- Y X Shen
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - S J Guo
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Y F Wu
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
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Yang XY, Zhang M, Luo XP, Wang JJ, Yin L, Pang C, Wang GA, Shen YX, Wu DT, Zhang L, Ren YC, Wang BY, Zhang HY, Zhou JM, Han CY, Zhao Y, Feng TP, Hu DS, Zhao JZ. [Body mass index, waist circumference and waist-to-height ratio associated with the incidence of type 2 diabetes mellitus: a cohort study]. Zhonghua Yu Fang Yi Xue Za Zhi 2017; 50:328-33. [PMID: 27029364 DOI: 10.3760/cma.j.issn.0253-9624.2016.04.009] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the association between body mass index (BMI), waist circumference (WC), waist-to-height ratio (WHtR), and the incidence risk of type 2 diabetes mellitus (T2DM). METHODS In total, 20 194 participants ≥18 years old were selected randomly by cluster sampling from two township (town) of the county in Henan province from July to August of 2007 and July to August of 2008 and the investigation included questionnaires, anthropometric measurements, fasting plasma glucose, and lipid profile examination were performed at baseline; 17 236 participants were enrolled in this cohort study. 14 720 (85.4%) were followed up from July to August 2013 and July to October 2014. Finally, 11 643 participants (4 301 males and 7 342 females) were included in this study. Incidence density and Cox proportional hazards regression models were used to evaluate the risk of T2DM associated with baseline BMI, WC, WHtR, and their dynamic changes. RESULTS After average of 6.01 years following up for 11 643 participants, 613 developed T2DM and the incidence density was 0.89 per 100 person-years. After adjusted for baseline sex, age, smoking, drinking, family history of diabetes, as well as the difference of fasting plasma-glucose (FPG), total cholesterol (TC), triglyceride (TG), high density lipoprotein cholesterol (HDL-C), systolic blood pressure (SBP), diastolic blood pressure (DBP) between baseline and follow-up, Cox Proportional-Hazards regression analysis indicated that T2DM risk of baseline BMI overweight group, BMI obesity group, abnormal WC group and abnormal WHtR group were significantly higher than that of the corresponding baseline normal groups , and the incidence risk of T2DM reached the highest for those whose baseline BMI, WC and WHtR were all abnormal, the corresponding HR (95%CI) were 2.05 (1.62-2.59), 3.01 (2.33-3.90), 2.34 (1.89-2.90), 2.88 (2.21-3.74), 3.32 (2.50-4.40), respectively. Whether baseline BMI/WC was normal or not, T2DM risk increased if baseline WHtR was abnormal, and the HR (95%CI) of baseline normal BMI/abnormal WHtR group, baseline abnormal BMI/abnormal WHtR group, baseline normal WC/abnormal WHtR group, baseline abnormal WC/abnormal WHtR group were 1.88 (1.29-2.74), 3.08 (2.34-4.05), 2.15(1.53-3.00), 3.22 (2.45-4.23), respectively. The analysis for dynamic changes of BMI, WC, and WHtR indicated that in baseline normal WC or WHtR group, T2DM risk increased when baseline normal WC or WHtR developed abnormal at follow-up, and the corresponding HR (95%CI) were 1.79 (1.26-2.55), 2.12(1.32-3.39), respectively. In baseline abnormal WC or WHtR group, T2DM risk decresed when baseline abnormal WC or WHtR reversed to normal at follow-up, and the corresponding HR (95%CI) were 2.16 (1.42-3.29), 2.62 (1.63-4.20), respectively. CONCLUSION BMI, WC, and WHtR were associated with increased T2DM risk. The more abnormal aggregation of BMI, WC, and WHtR presents, the higher T2DM risk was. T2DM risk could be decreased when abnormal WC or WHtR reversed to normal.
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Affiliation(s)
- X Y Yang
- Department of Epidemiology and Health Statistics, College of Public Health, Zhengzhou University, Zhengzhou 450001, China
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15
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Kowalik M, Schantz AB, Naqi A, Shen Y, Sines I, Maranas JK, Kumar M. Chemically specific coarse-grained models to investigate the structure of biomimetic membranes. RSC Adv 2017. [DOI: 10.1039/c7ra10573h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Biomimetic polymer/protein membranes are promising materials for DNA sequencing, sensors, drug delivery and water purification.
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Affiliation(s)
- Małgorzata Kowalik
- Department of Chemical Engineering
- The Pennsylvania State University
- University Park
- USA
| | - Allen B. Schantz
- Department of Chemical Engineering
- The Pennsylvania State University
- University Park
- USA
| | - Abdullah Naqi
- Department of Chemical Engineering
- The Pennsylvania State University
- University Park
- USA
| | - Yuexiao Shen
- Department of Chemical Engineering
- The Pennsylvania State University
- University Park
- USA
- Department of Chemistry
| | - Ian Sines
- Department of Chemical Engineering
- The Pennsylvania State University
- University Park
- USA
- Surface Conditioning Business Unit
| | - Janna K. Maranas
- Department of Chemical Engineering
- The Pennsylvania State University
- University Park
- USA
| | - Manish Kumar
- Department of Chemical Engineering
- The Pennsylvania State University
- University Park
- USA
- Department of Civil and Environmental Engineering
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16
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Licsandru E, Kocsis I, Shen YX, Murail S, Legrand YM, van der Lee A, Tsai D, Baaden M, Kumar M, Barboiu M. Salt-Excluding Artificial Water Channels Exhibiting Enhanced Dipolar Water and Proton Translocation. J Am Chem Soc 2016; 138:5403-9. [DOI: 10.1021/jacs.6b01811] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Erol Licsandru
- Adaptive
Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, Montpellier, F-34095, France
| | - Istvan Kocsis
- Adaptive
Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, Montpellier, F-34095, France
| | - Yue-xiao Shen
- Department
of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Samuel Murail
- Laboratoire de Biochimie
Théorique, CNRS UPR 9080, Institut de Biologie Physico-Chimique, 13 Rue Pierre et Marie Curie, F-75005 Paris, France
| | - Yves-Marie Legrand
- Adaptive
Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, Montpellier, F-34095, France
| | - Arie van der Lee
- Adaptive
Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, Montpellier, F-34095, France
| | - Daniel Tsai
- Department
of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Marc Baaden
- Laboratoire de Biochimie
Théorique, CNRS UPR 9080, Institut de Biologie Physico-Chimique, 13 Rue Pierre et Marie Curie, F-75005 Paris, France
| | - Manish Kumar
- Department
of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States
| | - Mihail Barboiu
- Adaptive
Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM-UMII-UMR CNRS 5635, Place Eugene Bataillon CC047, Montpellier, F-34095, France
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Grzelakowski M, Cherenet MF, Shen YX, Kumar M. A framework for accurate evaluation of the promise of aquaporin based biomimetic membranes. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.01.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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18
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Xiao K, Shen YX, Liang S, Liang P, Wang XM, Huang X. A systematic analysis of fouling evolution and irreversibility behaviors of MBR supernatant hydrophilic/hydrophobic fractions during microfiltration. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2014.05.030] [Citation(s) in RCA: 43] [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: 11/13/2022]
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Sun Y, Shen YX, Liang P, Zhou J, Yang Y, Huang X. Linkages between microbial functional potential and wastewater constituents in large-scale membrane bioreactors for municipal wastewater treatment. Water Res 2014; 56:162-71. [PMID: 24675272 DOI: 10.1016/j.watres.2014.03.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 04/26/2013] [Revised: 02/11/2014] [Accepted: 03/02/2014] [Indexed: 05/17/2023]
Abstract
Large-scale membrane bioreactors (MBRs) have been widely used for the municipal wastewater treatment, whose performance relies on microbial communities of activated sludge. Nevertheless, microbial functional structures in MBRs remain little understood. To gain insight into functional genes and their steering environmental factors, we adopted GeoChip, a high-throughput microarray-based tool, to examine microbial genes in four large-scale, in-operation MBRs located in Beijing, China. The results revealed substantial microbial gene heterogeneity (43.7-85.1% overlaps) among different MBRs. Mantel tests indicated that microbial nutrient cycling genes were significantly (P < 0.05) correlated to influent COD, [Formula: see text] -N, TP or sulfate, which signified the importance of microbial mediation of wastewater constituent removal. In addition, functional genes shared by all four MBRs contained a large number of genes involved in antibiotics resistance, metal resistance and organic remediation, suggesting that they were required for degradation or resistance to toxic compounds in wastewater. The linkages between microbial functional structures and environmental variables were also unveiled by the finding of hydraulic retention time, influent COD, [Formula: see text] -N, mixed liquid temperature and humic substances as major factors shaping microbial communities. Together, the results presented demonstrate the utility of GeoChip-based microarray approach in examining microbial communities of wastewater treatment plants and provide insights into the forces driving important processes of element cycling.
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Affiliation(s)
- Yanmei Sun
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Yue-xiao Shen
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Peng Liang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Jizhong Zhou
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China; Institute for Environmental Genomics, Department of Botany and Microbiology, University of Oklahoma, Norman, OK 73019, USA; Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Yunfeng Yang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China.
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Sun J, Xiao K, Mo Y, Liang P, Shen Y, Zhu N, Huang X. Seasonal characteristics of supernatant organics and its effect on membrane fouling in a full-scale membrane bioreactor. J Memb Sci 2014. [DOI: 10.1016/j.memsci.2013.11.003] [Citation(s) in RCA: 43] [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: 11/30/2022]
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22
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Erbakan M, Shen YX, Grzelakowski M, Butler PJ, Kumar M, Curtis WR. Molecular cloning, overexpression and characterization of a novel water channel protein from Rhodobacter sphaeroides. PLoS One 2014; 9:e86830. [PMID: 24497982 PMCID: PMC3909002 DOI: 10.1371/journal.pone.0086830] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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: 10/11/2013] [Accepted: 12/14/2013] [Indexed: 11/19/2022] Open
Abstract
Aquaporins are highly selective water channel proteins integrated into plasma membranes of single cell organisms; plant roots and stromae; eye lenses, renal and red blood cells in vertebrates. To date, only a few microbial aquaporins have been characterized and their physiological importance is not well understood. Here we report on the cloning, expression and characterization of a novel aquaporin, RsAqpZ, from a purple photosynthetic bacterium, Rhodobacter sphaeroides ATCC 17023. The protein was expressed homologously at a high yield (∼20 mg/L culture) under anaerobic photoheterotrophic growth conditions. Stopped-flow light scattering experiments demonstrated its high water permeability (0.17±0.05 cm/s) and low energy of activation for water transport (2.93±0.60 kcal/mol) in reconstituted proteoliposomes at a protein to lipid ratio (w/w) of 0.04. We developed a fluorescence correlation spectroscopy based technique and utilized a fluorescent protein fusion of RsAqpZ, to estimate the single channel water permeability of RsAqpZ as 1.24 (±0.41) x 10(-12) cm(3)/s or 4.17 (±1.38)×10(10) H2O molecules/s, which is among the highest single channel permeability reported for aquaporins. Towards application to water purification technologies, we also demonstrated functional incorporation of RsAqpZ in amphiphilic block copolymer membranes.
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Affiliation(s)
- Mustafa Erbakan
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Yue-xiao Shen
- Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | | | - Peter J. Butler
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Manish Kumar
- Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
- * E-mail: (MK); (WRC)
| | - Wayne R. Curtis
- Department of Biomedical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
- Department of Chemical Engineering, Pennsylvania State University, University Park, Pennsylvania, United States of America
- * E-mail: (MK); (WRC)
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Xiao K, Shen Y, Huang X. An analytical model for membrane fouling evolution associated with gel layer growth during constant pressure stirred dead-end filtration. J Memb Sci 2013. [DOI: 10.1016/j.memsci.2012.09.049] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kumar M, Habel JEO, Shen YX, Meier WP, Walz T. High-density reconstitution of functional water channels into vesicular and planar block copolymer membranes. J Am Chem Soc 2012; 134:18631-7. [PMID: 23082933 PMCID: PMC3497857 DOI: 10.1021/ja304721r] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [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] [Indexed: 11/28/2022]
Abstract
![]()
The exquisite selectivity and unique transport properties
of membrane
proteins can be harnessed for a variety of engineering and biomedical
applications if suitable membranes can be produced. Amphiphilic block
copolymers (BCPs), developed as stable lipid analogs, form membranes
that functionally incorporate membrane proteins and are ideal for
such applications. While high protein density and planar membrane
morphology are most desirable, BCP–membrane protein aggregates
have so far been limited to low protein densities in either vesicular
or bilayer morphologies. Here, we used dialysis to reproducibly form
planar and vesicular BCP membranes with a high density of reconstituted
aquaporin-0 (AQP0) water channels. We show that AQP0 retains its biological
activity when incorporated at high density in BCP membranes, and that
the morphology of the BCP–protein aggregates can be controlled
by adjusting the amount of incorporated AQP0. We also show that BCPs
can be used to form two-dimensional crystals of AQP0.
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Affiliation(s)
- Manish Kumar
- Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, United States.
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Shen YX, Xiao K, Liang P, Sun JY, Sai SJ, Huang X. Characterization of soluble microbial products in 10 large-scale membrane bioreactors for municipal wastewater treatment in China. J Memb Sci 2012. [DOI: 10.1016/j.memsci.2012.05.017] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Shen YX, Sun AM, Fang S, Feng LJ, Li Q, Hou HL, Liu C, Wang HP, Shen JL, Luo J, Zhou JN. Hrd1 facilitates tau degradation and promotes neuron survival. Curr Mol Med 2012; 12:138-52. [PMID: 22280354 DOI: 10.2174/156652412798889009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Revised: 11/14/2011] [Accepted: 11/19/2011] [Indexed: 02/08/2023]
Abstract
Intraneuronal accumulation of abnormal phosphorylated tau (p-tau) is a molecular pathology in many neurodegenerative tauopathies, including Alzheimer's disease (AD) and frontotemporal dementia with parkinsonism-linked to chromosome 17 (FTDP-17). However, the underlying mechanism remains unclear. Here, we showed an inverse relationship between endoplasmic reticulum membrane ubiquitin ligase (E3) Hrd1 expression and p-tau accumulation in the hippocampal neurons of AD, and proposed that Hrd1 may be a negative regulator of p-tau. This notion was further supported by in vitro study demonstrating that Hrd1 interacted with tau and promoted the degradation of total tau and p-tau as well. The degradation of tau depended on its Hrd1 E3 activity. Knockdown of endogenous Hrd1 with siRNA stabilized tau levels. In addition, inhibition of proteasome maintained tau level and increased Hrd1-mediated tau ubiquitination, suggesting the proteasome was involved in tau/p-tau degradation. Over-expression of Hrd1 significantly alleviated tau cytotoxicity and promoted cell survival. These results indicated that Hrd1 functions as an E3 targeting tau or abnormal p-tau for proteasome degradation. The study provides an important insight into the molecular mechanisms of human tauopathies.
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Affiliation(s)
- Y X Shen
- Hefei National Laboratory for Physical Sciences at Microscale, Hefei 230027, China.
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Tai KP, Dai XD, Shen YX, Liu BX. Formation and structural anomaly of the metastable phases in an immiscible Ag-Mo system studied by ion beam mixing and molecular dynamics simulation. J Phys Chem B 2006; 110:595-606. [PMID: 16471572 DOI: 10.1021/jp052847t] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
For the equilibrium immiscible Ag-Mo system characterized by a large positive heat of formation, the nanosized Ag-Mo multilayered samples are designed and prepared to include sufficient interfacial free energy to elevate their initial energetic states to be higher than that of either the amorphous phase or solid solution and then subject to 200 keV xenon ion irradiation. The results show that a uniform amorphous alloy can be obtained within a composition range, at least, from 25 to 88 atom % of Mo. Interestingly, in the intermediate stage of ion irradiation, a bcc phase, an amorphous phase, and an order (bcc)-disorder coexisting state appear simultaneously in the Ag12Mo88 multilayered sample and extend over the entire bright field image with unanimously homogeneous composition. In thermodynamic modeling, a Gibbs free energy diagram of the Ag-Mo system is constructed, based on Miedema's model, and suggests that within a narrow composition regime of 85-90 atom % of Mo, the energy difference between the bcc and the amorphous phases is extremely small, which is probably the very reason for the order-disorder coexisting state to appear. In atomistic modeling, an ab initio derived Ag-Mo potential is applied to perform molecular dynamics simulations. The simulations not only determine an intrinsic glass-forming ability/range (GFA/GFR) of the Ag-Mo system to be from 10 to 88 atom % of Mo but also reveal the possibility of the formation/appearance of a crystalline and amorphous mixture in a narrow composition regime of 88-92 atom % of Mo. Apparently, the theoretical results are in excellent agreement and/or compatible with the experimental observations in ion beam mixing.
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Affiliation(s)
- K P Tai
- Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Zhang RF, Shen YX, Yan HF, Liu BX. Formation of amorphous alloys by ion beam mixing and its multiscale theoretical modeling in the equilibrium immiscible Sc-W system. J Phys Chem B 2005; 109:4391-7. [PMID: 16851507 DOI: 10.1021/jp046672j] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Unique amorphous alloys are synthesized at the compositions of 25 and 40 atom % of W by ion beam mixing in the equilibrium immiscible Sc-W system characterized by a positive heat of formation of +14 kJ/mol. In thermodynamic modeling, a Gibbs free energy diagram is constructed based on Miedema's theory, and the diagram predicts a glass-forming range of the Sc-W system to be within 12-58 atom % of W. To develop an atomistic model, ab initio calculations are first conducted to assist the construction of an n-body Sc-W potential under the embedded atom method. The proven realistic potential is applied in molecular dynamic simulations to study the crystal-to-amorphous transition in the Sc-W solid solutions, thus determining the glass-forming ability of the system to be within 15-50 atom % of W. Apparently, both theoretical predicted glass-forming ranges cover the experimentally measured one, showing an excellent agreement. We report, in this paper, the experimental results from ion beam mixing and the multiscale theoretical modeling concerning the amorphous alloy formation in the Sc-W system together with a brief discussion of the structural transition mechanism.
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Affiliation(s)
- R F Zhang
- Advanced Materials Laboratory, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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Abstract
This work investigated the ability of melatonin to prevent oxidative damage in brain tissue induced by injection of beta-amyloid peptide 25-35 (Abeta25-35) in middle-aged rats. The Morris water maze was used to evaluate the cognitive function of the rats. Thiobarbituric acid-reactive substances and antioxidative enzymes (superoxide dismutase and glutathione peroxidase) activities were measured. It was found that injection of (Abeta25-35) (20 microg) into the rat hippocampus caused an increase in the latency (the time to find the platform), the total swimming distance to the platform, and the starting angles in (Abeta25-35)-treated rats. Furthermore, a significant rise in lipid peroxidation and decrease in antioxidative enzyme activities in brain tissue were found. Melatonin (0.1, 1, and 10 mg/kg, i.g. x 10 days) improved the spatial resolution of amnesic rats in the Morris water maze test. Meanwhile, melatonin antagonized the lipid peroxidation in both the mitochondria (P < 0.01) at the doses of 0.1, 1.0, and 10 mg/kg and in the cytoplasm at the doses of 0.1 and 1.0 mg/kg. Also in the amnesic rats, melatonin (0.1, 1.0, and 10 mg/kg. i.g. x 10 days) stimulated the antioxidative enzyme activities. The results show that melatonin effectively reduced lipid peroxidation and enhanced the antioxidative enzyme activities in Abeta(25-35)-treated rats, which may contribute to the improvement of rats' learning and memory impaired by Abeta(25-35).
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Affiliation(s)
- Y X Shen
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei, China.
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Shen YX, Wei W, Yang J, Liu C, Dong C, Xu SY. Improvement of melatonin to the learning and memory impairment induced by amyloid beta-peptide 25 - 35 in elder rats. Acta Pharmacol Sin 2001; 22:797-803. [PMID: 11749859 DOI: pmid/11749859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
AIM To investigate improvement of melatonin on learning and memory impairment induced by amyloid beta-peptide 25 - 35 (Abeta25-35) in elder rats. METHODS Step-down type passive avoidance test, shuttle-box test, and Morris water maze were used together to determine effects of Abeta25-35 and melatonin on learning and memory. Pathological changes were observed by HE, Congo red, and Ag staining. RESULTS The elder rats were injected bilaterally Abeta25-35 20 microg into the hippocampus to induce learning and memory dysfunction. Melatonin administration (0.1, 1, and 10 mg/kg, ig x 8 d) to the Abeta25-35-treated rats prolonged the latency, shortened the total stimulating time, and decreased the number of errors in the step-down test. Shuttle-box test showed that melatonin improved amnesic rats' performance at the same doses. Melatonin (0.1, 1, and 10 mg/kg ), giving for 10 d, could enhance the spatial resolution of amnesic rats in Morris water maze test. Also in Abeta25-35-treated group, a decrease in the number of neurons in cortex and hippocampus, a massive glial reaction, and neurophilic phenomenon were detected by HE staining; the positive vascular amyloidosis by Congo red and fibrils by Ag staining were observed. Melatonin (0.1 and 1 mg/kg)could inhibit above pathological changes in Abeta25-35 group. CONCLUSION Melatonin improved the impaired learning and memory induced by Abeta25-35 in elder rats.
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Affiliation(s)
- Y X Shen
- Institute of Clinical Pharmacology, Anhui Medical University, Hefei 230032, China.
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Zhang ZL, Ren YG, Shen YX, Shan S, Fan GC, Wu XF, Qian KX, Shen GF. [Expression of Bacillus thuringiensis (Bt) crystal toxin gene in the chloroplast of tobacco]. Yi Chuan Xue Bao 2000; 27:270-7. [PMID: 10887699] [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: 02/17/2023]
Abstract
The 3.5 kb wild-type Bt Cry I A(c) gene and its 3' truncated forms (2.1 kb, 1.8 kb) were placed under the control of plastid expression signals consisting of the strong light-induced psbA promoter and its 3' untranslated region with the aadA cassette (Prrn, aadA and psbA3') as a selectable marker. The resulting vectors pBT3, pBT8 and pBT22 also contain flanking tobacco plastid DNA homology regions to direct insertion of the Bt transgene into the tobacco plastid genome between psbA and trnK by homologous recombination. Transformed plastid genomes were selectively amplified by growing the cells on spectinomycin medium. Several independently transformed lines were obtained at last. The results of Southern and Western blot demonstrated that these three kinds of Bt genes had been introduced into tobacco plants, and their filial generations are resistant to spectinomycin. Insecticidal activity assay with transgenic tobacco leaves indicate that some plants have strong toxicity to cotton bollworm. This is the first report in China that Bt gene has been introduced and successfully expressed in the chloroplast of higher plants.
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Affiliation(s)
- Z L Zhang
- Biotechnology Research Center, Chinese Academy of Agricultural Sciences, Beijing, China
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Shen YX, Quan LH, Guan L, Chen JM. [Studies on the flavonoids from Dendranthema lavandulifolium]. Yao Xue Xue Bao 1997; 32:451-4. [PMID: 11596327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
From the whole plant of Dendranthema lavandulifolium, two flavonoides (I, II) and two flavone glycosides (III, IV) were isolated. They were identified as luteolin (I), apigenin (II), 5-hydroxy-4'-methoxy-flavone-7-O-alpha-L-rhamnopyranosyl(1-->6)-beta- D-glucopyranosyl (acaciin III) and 5-hydroxy-4'-methoxy-flavone-7-O-alpha-L-rhamnopyranosyl (1-->6) [2-O-acetyl-beta-D-glucopyranosyl(1-->2)]-beta-D-glucopyranoside (IV) by means of IR, UV, 1H-NMR, 13C-NMR, EI-MS, HRFAB, etc. Among these four compounds, I, II were isolated for the first time from this plant, IV is a new compound.
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Affiliation(s)
- Y X Shen
- Institute of Medicinal Plant, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100094
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Zhou XG, Wang YC, Yu BM, Shen YX, Chen ZR, Lin LH, Yang JS, Zhang DS, Ding QG, Ma L. [Route and preparation of 5-Fu administration as preoperative adjuvant chemotherapy in rectal cancer. II. Morphologic, ultrastructural and histochemical changes of the cancer cells after intrarectal and intravenous 5-Fu administration]. Zhonghua Zhong Liu Za Zhi 1988; 10:220-3. [PMID: 3219984] [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: 01/04/2023]
Abstract
From March 1981 to October 1985, 5-Fu was preoperatively given to 65 Dukes B and C rectal cancer patients (intrarectal suppository 40 and emulsion 20, intravenous 5). The results indicated that after intrarectal administration, marked changes and destruction of the cancer cells in morphology were observed in 40% of the resected rectal specimens for suppository and in 45% for emulsion; marked retrograde degeneration in ultrastructure was found in 47.5% for suppository and in 50% for emulsion; DNA synthesis was obviously reduced in 63% for suppository and in 75% for emulsion. It is suggested that the emulsion be a better preparation. No obvious changes or destruction in morphology and ultrastructure were observed in cancer cells treated by intravenous drip of high dose 5-Fu though leukopenia below 4000 was found in 2/5. However, it was 0/60 by rectal administration. This implies that the intrarectal route is more rational than the conventional intravenous route. This study presents an alternate supplementary treatment in addition to radiotherapy for the reduction of postoperative local recurrence of Dukes B and C rectal cancers.
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Affiliation(s)
- X G Zhou
- Ruijin Hospital, Shanghai Second Medical College
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Zhou XG, Wang YC, Yu BM, Shen YX, Jiang JT, Zhang DS, Ding QG, Xia ZQ, Xie GP, Liu Y. [Route and preparation of 5-Fu administration as preoperative adjuvant chemotherapy in rectal cancer. I. Concentration and distribution of 5-Fu in tissues monitored by 14C-isotopically tagged 5-Fu]. Zhonghua Zhong Liu Za Zhi 1988; 10:81-4. [PMID: 3208659] [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: 01/04/2023]
Abstract
Experimental studies on more rational route and preparation of preoperative administration of 5-Fu were undertaken from March 1981 to June 1985. The experimental observation shows that intrarectal administration of radioisotope 14C tagged 5-Fu (suppository and emulsion) produces a much higher concentration in the rectal wall and mesenteric lymph nodes compared with its intravenous administration (40 rabbits) and produces a much higher concentration in cancer tissue than in surrounding tissues and in mesenteric lymph nodes than in the inferior mesenteric veins (4 patients). These findings favor the attenuation or destruction of cancer cells in the tumor and regional lymph nodes-the main route of spread. Also, after intrarectal administration of 14C tagged 5-Fu, its concentration in the lung, liver and bone marrow is much lower than that after intravenous administration (40 rabbits), and hence systemic toxicity is decreased. The above results indicate that the intrarectal route stands better than the conventional intravenous route for 5-Fu preoperative adjuvant chemotherapy in rectal cancer. Administration of 5-Fu emulsion produces a higher concentration in the rectal wall and mesenteric lymph nodes than that of 5-Fu suppository and peak concentration also appears earlier, i.e. 2 hours after the administration of 5-Fu emulsion. This will lessen the interference of 5-Fu absorption owing to its premature evacuation, indicating that emulsion is a better form for intrarectal 5-Fu.
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Affiliation(s)
- X G Zhou
- Ruijin Hospital, Shanghai Second Medical College
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Shen YX. [Cerebral infarction: CT findings and clinical manifestations]. Zhonghua Shen Jing Jing Shen Ke Za Zhi 1987; 20:105-8. [PMID: 3622104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Abstract
One thousand two hundred twenty-six cases of colorectal cancer were treated surgically between 1956 and 1978. Seven hundred ninety-eight cases (65.08 per cent) were rectal, 74.3 per cent of which were located extraperitoneally. Dukes' C2 cases and cases with distant metastasis constituted 39.15 per cent, and Dukes' A cases, 9.22 per cent. Resectability rate was 75.1 per cent (77.6 per cent for rectal cancer). Two hundred and four cases (32.96 per cent) of rectal excision were restorative resections. Of the combined excisions for extraperitoneal lesions in females, 84.8 per cent were posterior pelvic exenterations. The overall operative mortality rate was 2.93 per cent. The mortality rate for 921 cases of resection was 1.73 per cent, for rectal resection, 0.8 per cent, and for curative rectal resection, 0.63 per cent. The follow-up rate was 94.13 per cent. The five-and ten-year survival rates for rectal resection were 53.08 +/- 2.29 per cent and 47.65 +/- 2.44 per cent; for curative rectal resection. 66.91 +/- 2.54 per cent and 60.27 +/- 3.03 per cent; and for Dukes' A cases, 98.05 +/- 1.35 per cent and 96.39 +/- 2.13 per cent. The five-and ten-year survival rates for colonic resection were 59.79 +/- 2.04 per cent and 52.18 +/- 3.49 per cent; for curative colonic resection, 72.79 +/- 3.39 per cent and 62.06 +/- 4.17 per cent; and for Dukes' A cases, both 100 per cent. Besides the extent of spread and degree of malignancy of a lesion, the local immunologic reaction of the host is also important in prognosis. The more lymphocytic infiltration in and around the cancer, the more follicular hyperplasia and sinus histiocytosis in regional lymph nodes, the better is the prognosis. The problem of anal preservation in radical resection of rectal cancer and the problem of improvement of results in the treatment of extraperitoneal rectal cancer are discussed in detail.
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Zhou XG, Yu BM, Shen YX. Surgical treatment and late results in 1,226 colorectal cancer cases. Chin Med J (Engl) 1982; 95:483-90. [PMID: 6816516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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Xu KL, Li ML, Guan SF, Yu EX, Song MZ, Shen YX. [Clinical analysis of low AFP level cases and their prognosis (author's transl)]. Zhonghua Zhong Liu Za Zhi 1980; 2:45-9. [PMID: 6160027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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