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Ren E, Qiu H, Yu Z, Cao M, Sohail M, Lu GP, Zhang X, Lin Y. Nanozyme sensor array based on Fe, Se co-doped carbon material for the discrimination of Sulfur-containing compounds. J Hazard Mater 2024; 470:134127. [PMID: 38554521 DOI: 10.1016/j.jhazmat.2024.134127] [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: 01/02/2024] [Revised: 03/17/2024] [Accepted: 03/24/2024] [Indexed: 04/01/2024]
Abstract
Developing methods for the accurate identification and analysis of sulfur-containing compounds (SCCs) is of great significance because of their essential roles in living organisms and the diagnosis of diseases. Herein, Se-doping improved oxidase-like activity of iron-based carbon material (Fe-Se/NC) was prepared and applied to construct a four-channel colorimetric sensor array for the detection and identification of SCCs (including biothiols and sulfur-containing metal salts). Fe-Se/NC can realize the chromogenic oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) by activating O2 without relying on H2O2, which can be inhibited by different SCCs to diverse degrees to produce different colorimetric response changes as "fingerprints" on the sensor array. Principal component analysis (PCA) and hierarchical cluster analysis (HCA) revealed that nine kinds of SCCs could be well discriminated. The sensor array was also applied for the detection of SCCs with a linear range of 1-50 μM and a limit of detection of 0.07-0.2 μM. Moreover, colorimetric sensor array inspired by the different levels of SCCs in real samples were used to discriminate cancer cells and food samples, demonstrating its potential application in the field of disease diagnosis and food monitoring. ENVIRONMENTAL IMPLICATIONS: In this work, a four-channel colorimetric sensor array for accurate SCCs identification and detection was successfully constructed. The colorimetric sensor array inspired by the different levels of SCCs in real samples were also used to discriminate cancer cells and food samples. Therefore, this Fe-Se/NC based sensor array is expected to be applied in the field of environmental monitoring and environment related disease diagnosis.
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Affiliation(s)
- Enxiang Ren
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Haochen Qiu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Zhixuan Yu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Min Cao
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Muhammad Sohail
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Guo-Ping Lu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing 210094, China
| | - Xing Zhang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China.
| | - Yamei Lin
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China; International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing 210037, China.
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Zhu F, Yu Y, Yu Z, Qiu H, Lu GP, Chen Z, Hu J, Lin Y. S-Doping Regulated Iron Spin States in Fe-N-C Single-Atom Material for Enhanced Peroxidase-Mimicking Activity at Neutral pH. Small 2024:e2311848. [PMID: 38556630 DOI: 10.1002/smll.202311848] [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: 12/18/2023] [Revised: 03/01/2024] [Indexed: 04/02/2024]
Abstract
Designing biomimetic nanomaterials with peroxidase (POD)-like activity at neutral pH remains a significant challenge. An S-doping strategy is developed to afford an iron single-atom nanomaterial (Fe1@CN-S) with high POD-like activity under neutral conditions. To the best of knowledge, there is the first example on the achievement of excellent POD-like activity under neutral conditions by regulating the active site structure. S-doping not only promotes the dissociation of the N─H bond in 3,3″,5,5″-tetramethylbenzidine (TMB), but also facilitates the desorption of OH* by the transformation of iron species' spin states from middle-spin (MS FeII) to low-spin (LS FeII). Meanwhile, LS FeII sites typically have more unfilled d orbitals, thereby exhibiting stronger interactions with H2O2 than MS FeII, which can enhance POD-like activity. Finally, a one-pot visual detection of glucose at pH 7 is performed, demonstrating the best selectivity and sensitivity than previous reports.
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Affiliation(s)
- Fuying Zhu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - YueYi Yu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Zhixuan Yu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Haochen Qiu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Guo-Ping Lu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing, 210094, P. R. China
| | - Zhong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Jun Hu
- School of Chemical Engineering, Northwest University, Xi'an, 710069, P. R. China
| | - Yamei Lin
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, P. R. China
- International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University, Nanjing, 210037, P. R. China
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Lin YM, Huang JL, Zhang XQ. [Screen viewing in children under 3 years old: a review of correlates based on socio-ecological models]. Zhonghua Er Ke Za Zhi 2023; 61:852-855. [PMID: 37650171 DOI: 10.3760/cma.j.cn112140-20230608-00387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Affiliation(s)
- Y M Lin
- Nursing Department, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen 361000, China
| | - J L Huang
- Department of Neurorehabilitation, Fujjan Children's Hospital, Fujian Branch of Shanghai Children's Medical Center, Fuzhou 350000, China
| | - X Q Zhang
- Xiamen Clinical Research Center for Perinatal Medicine, Women and Children's Hospital, School of Medicine, Xiamen University, Xiamen 361000, China
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Chen B, Wang X, Sun J, Lin Y, Zhi H, Shao K, Fu Y, Liu Z. Study on the Interactions Between Cisplatin and Cadherin by Fluorescence Spectrometry and Atomic Force Microscopy. J Fluoresc 2023:10.1007/s10895-023-03401-1. [PMID: 37615895 DOI: 10.1007/s10895-023-03401-1] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Accepted: 08/16/2023] [Indexed: 08/25/2023]
Abstract
Cisplatin is an important platinum drug in cancer chemotherapy in clinical practice. It is well established that the main target of cisplatin is nuclear DNA. However, recent studies have demonstrated that platinum drugs may act on some important functional proteins in the human body. E-cadherin is a newly discovered glycoprotein that has been regarded as an important sign of the occurrence and development of some tumors. This study examines the interactions between cisplatin and E-cadherin by fluorescence spectrometry and atomic force microscopy (AFM). The fluorescence spectrometry results indicated that cisplatin can efficiently quench the fluorescence of E-cadherin. The calculated binding constant Kb was 3.20 × 106 (25 ℃), 1.36 × 106(31 ℃), and 8.22 × 105 L mol-1 (37 ℃). These results reveal that the fluorescence quenching effect of cisplatin on E-cadherin is static quenching. The obtained thermodynamic parameters ΔH < 0, ΔS < 0, and ΔG < 0, indicate that the binding of cisplatin on E-cadherin is a spontaneous process dominated by hydrogen bonds and Van der Waals forces. The AFM results revealed that E-cadherins are interlaced with each other to form a spherical-chain structure. The addition of cisplatin can significantly disrupt the interlaced structure of the E-cadherin molecules.
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Affiliation(s)
- Boyu Chen
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Ministry of Education, Engineering Research Center of Forest Bio-Preparation, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-Based Active Substances, Heilongjiang, People's Republic of China
| | - Xitong Wang
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Jixiang Sun
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Yamei Lin
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Ministry of Education, Engineering Research Center of Forest Bio-Preparation, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-Based Active Substances, Heilongjiang, People's Republic of China
| | - Hongxin Zhi
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Ministry of Education, Engineering Research Center of Forest Bio-Preparation, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-Based Active Substances, Heilongjiang, People's Republic of China
| | - Kai Shao
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Ministry of Education, Engineering Research Center of Forest Bio-Preparation, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-Based Active Substances, Heilongjiang, People's Republic of China
| | - Yujie Fu
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China
- Ministry of Education, Engineering Research Center of Forest Bio-Preparation, Northeast Forestry University, Harbin, 150040, People's Republic of China
| | - Zhiguo Liu
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin, 150040, People's Republic of China.
- College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin, 150040, People's Republic of China.
- Ministry of Education, Engineering Research Center of Forest Bio-Preparation, Northeast Forestry University, Harbin, 150040, People's Republic of China.
- Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-Based Active Substances, Heilongjiang, People's Republic of China.
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Zhang X, Zhang Q, Reng J, Lin Y, Tang Y, Liu G, Wang P, Lu GP. N, S Co-Coordinated Zinc Single-Atom Catalysts for N-Alkylation of Aromatic Amines with Alcohols: The Role of S-Doping in the Reaction. Nanomaterials (Basel) 2023; 13:445. [PMID: 36770405 PMCID: PMC9919690 DOI: 10.3390/nano13030445] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/15/2023] [Accepted: 01/16/2023] [Indexed: 06/18/2023]
Abstract
S-doping emerged as a promising approach to further improve the catalytic performance of carbon-based materials for organic synthesis. Herein, a facile and gram-scale strategy was developed using zeolitic imidazole frameworks (ZIFs) as a precursor for the fabrication of the ZIF-derived N, S co-doped carbon-supported zinc single-atom catalyst (CNS@Zn1-AA) via the pyrolysis of S-doped ZIF-8, which was modified by aniline, ammonia and thiourea and prepared by one-pot ball milling at room temperature. This catalyst, in which Zn is dispersed as the single atom, displays superior activity in N-alkylation via the hydrogen-borrowing strategy (120 °C, turnover frequency (TOF) up to 8.4 h-1). S-doping significantly enhanced the catalytic activity of CNS@Zn1-AA, as it increased the specific surface area and defects of this material and simultaneously increased the electron density of Zn sites in this catalyst. Furthermore, this catalyst had excellent stability and recyclability, and no obvious loss in activity after eight runs.
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Affiliation(s)
- Xueping Zhang
- School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Qiang Zhang
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Jiacheng Reng
- School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Yamei Lin
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Wenyuanstreet 200, Nanjing 210032, China
| | - Yongxing Tang
- School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Guigao Liu
- School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Pengcheng Wang
- School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Guo-Ping Lu
- School of Chemistry and Chemical Engineering, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
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Cao M, Yu J, Zhang X, Lin Y, Huang H. Laccase-functionalized magnetic framework composite enabled chlorophenols degradation, a potential remediation for fungicides residues in leather. J Leather Sci Eng 2022. [DOI: 10.1186/s42825-022-00094-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
Chlorophenols, used as the fungicides in leather, are strictly limited in leather products. In this work, a metal–organic framework material, zeolitic metal azolate framework-7 (MAF-7), was first used to encapsulate laccase (Lac) to prepare MAF-7/Lac bio-composites with 98.5% immobilization yield. Afterward, Lac/MNP@MOM was formed by introducing the magnetic nanoparticles (MNPs) into the Lac@MOM. MAF-7 with better hydrophilicity and stronger pH buffering ability, exhibits good compatibility with laccase, which can reserve the activity of laccase after immobilization. Moreover, the porous structure of MAF-7 is favorable for the sufficient contact between laccase and substrates. Lac/MNP@MOM exhibited excellent activity when exposed to high temperature, extreme pH, and organic solvents, which also simplified complex recovery steps. Furthermore, the degradation rate of 2,4-dichlorophenol (2,4-DCP) could reach as high as 97% within 24 h by immobilized laccase, and after nine consecutive cycles of operation, enzyme activity could remain over 80%, which gives it the potential for practical applications.
Graphical abstract
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Lin Y, Wang F, Ren E, Zhu F, Zhang Q, Lu GP. N, Si-codoped carbon-based iron catalyst for efficient, selective synthesis of pyrroles from nitroarenes: The role of Si doping. J Catal 2022. [DOI: 10.1016/j.jcat.2022.10.017] [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: 11/06/2022]
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Wang F, Zhu F, Ren E, Zhu G, Lu GP, Lin Y. Recent Advances in Carbon-Based Iron Catalysts for Organic Synthesis. Nanomaterials (Basel) 2022; 12:nano12193462. [PMID: 36234590 PMCID: PMC9565280 DOI: 10.3390/nano12193462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 05/13/2023]
Abstract
Carbon-based iron catalysts combining the advantages of iron and carbon material are efficient and sustainable catalysts for green organic synthesis. The present review summarizes the recent examples of carbon-based iron catalysts for organic reactions, including reduction, oxidation, tandem and other reactions. In addition, the introduction strategies of iron into carbon materials and the structure and activity relationship (SAR) between these catalysts and organic reactions are also highlighted. Moreover, the challenges and opportunities of organic synthesis over carbon-based iron catalysts have also been addressed. This review will stimulate more systematic and in-depth investigations on carbon-based iron catalysts for exploring sustainable organic chemistry.
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Affiliation(s)
- Fei Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Fuying Zhu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Enxiang Ren
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Guofu Zhu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
| | - Guo-Ping Lu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing 210094, China
- Correspondence: (G.-P.L.); (Y.L.)
| | - Yamei Lin
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, China
- Correspondence: (G.-P.L.); (Y.L.)
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Lin Y, Wang F, Yu J, Zhang X, Lu GP. Iron single-atom anchored N-doped carbon as a 'laccase-like' nanozyme for the degradation and detection of phenolic pollutants and adrenaline. J Hazard Mater 2022; 425:127763. [PMID: 34801307 DOI: 10.1016/j.jhazmat.2021.127763] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [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: 09/07/2021] [Revised: 11/01/2021] [Accepted: 11/09/2021] [Indexed: 05/09/2023]
Abstract
To solve the inherent defects of laccase, the first iron single-atom anchored N-doped carbon material (Fe1@CN-20) as a laccase mimic was disclosed. The FeN4 structure of this material can well mimic the catalytic activity of laccase. Although Fe1@CN-20 has a lower metal content (2.9 wt%) than any previously reported laccase mimics, it exhibits kinetic constants comparable to those of laccase, as its Km (Michaelis constant) and Vmax (maximum rate) are 0.070 mM and 2.25 µM/min respectively, which are similar to those of laccase (0.078 mM, 2.49 µM/min). This catalyst displays excellent stability even under extreme pH (2-9), high temperature (100 °C), strong ionic strength (500 mM of NaCl), high ethanol concentration (volume ratio 40%) and long storage time (2 months). Additionally, it can be reused for at least 7 times with only a slight loss in activity. Therefore, this material has a much lower price and better stability and recyclability than laccase, which has been applied in the detection and degradation of a series of phenolic compounds. In the detection of adrenaline, Fe1@CN-20 achieved a detection limit of 1.3 µM, indicating it is more sensitive than laccase (3.9 µM).
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Affiliation(s)
- Yamei Lin
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China
| | - Fei Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China
| | - Jie Yu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China
| | - Xing Zhang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China.
| | - Guo-Ping Lu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing 210094, PR China.
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Wang F, Zhu F, Ren E, Zhang Q, Lu GP, Lin Y. Fe–FeO x nanoparticles encapsulated in N-doped carbon material: a facile catalyst for selective synthesis of quinazolines from alcohols in water. Catal Sci Technol 2022. [DOI: 10.1039/d2cy01562e] [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: 11/21/2022]
Abstract
A Fe–FeOx@NC catalyst with N-doped carbon encapsulated Fe–FeOx nanoparticles has excellent performance in the synthesis of quinazolines.
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Affiliation(s)
- Fei Wang
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China
| | - Fuying Zhu
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China
| | - Enxiang Ren
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China
| | - Qiang Zhang
- School of Chemistry and Life Sciences, Suzhou University of Science and Technology, Suzhou 215009, China
| | - Guo-Ping Lu
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei Street, Nanjing 210094, PR China
| | - Yamei Lin
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, PR China
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Lin Y, Yu J, Zhang X, Fang J, Lu GP, Huang H. Carbohydrate-derived porous carbon materials: An ideal platform for green organic synthesis. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.06.045] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Li J, Sun C, Lin Y, Zhi H, Fu Y, Liu Z. The interaction of proanthocyanidins with DNA molecules studied by atomic force microscopy and spectroscopic method. Ultramicroscopy 2021; 230:113393. [PMID: 34607224 DOI: 10.1016/j.ultramic.2021.113393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 09/06/2021] [Accepted: 09/20/2021] [Indexed: 11/28/2022]
Abstract
The interactions of the naturally available botanicals with DNA molecules have received considerable attention owing to the potential to develop for medicinal agents. In this study, the interaction of proanthocyanidins with DNA molecules was studied by atomic force microscopy (AFM) and spectroscopic method. The AFM observation indicated that proanthocyanidins induced DNA molecules from double helix chains to the thick rope and toroids. The heights of the formed DNA structures are more than eight times than that of DNA double helix. Spectroscopic measurement results revealed that proanthocyanidins intercalated between the base pairs of DNA in the intercalative binding mode, which resulted in unwinding the DNA helix, twisting the DNA strands and finally transforming into the supercoiled DNA structures. All these results implied that DNA molecule is an important interaction target of proanthocyanidins, and the formed compact DNA structures have biological significance on the gene expression and regulation.
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Affiliation(s)
- Jingchao Li
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China
| | - Congcong Sun
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China
| | - Yamei Lin
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China
| | - Hongxin Zhi
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China
| | - Yujie Fu
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China
| | - Zhiguo Liu
- Key Laboratory of Forest Plant Ecology, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China; College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, People's Republic of China; Engineering Research Center of Forest Bio-preparation, Ministry of Education, Northeast Forestry University, Harbin 150040, People's Republic of China.
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14
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Pan HJ, Lin Y, Gao T, Lau KK, Feng W, Yang B, Zhao Y. Catalytic Diastereo- and Enantioconvergent Synthesis of Vicinal Diamines from Diols through Borrowing Hydrogen. Angew Chem Int Ed Engl 2021; 60:18599-18604. [PMID: 34125475 DOI: 10.1002/anie.202101517] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 01/31/2021] [Revised: 06/13/2021] [Indexed: 01/23/2023]
Abstract
We present herein an unprecedented diastereoconvergent synthesis of vicinal diamines from diols through an economical, redox-neutral process. Under cooperative ruthenium and Lewis acid catalysis, readily available anilines and 1,2-diols (as a mixture of diastereomers) couple to forge two C-N bonds in an efficient and diastereoselective fashion. By identifying an effective chiral iridium/phosphoric acid co-catalyzed procedure, the first enantioconvergent double amination of racemic 1,2-diols has also been achieved, resulting in a practical access to highly valuable enantioenriched vicinal diamines.
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Affiliation(s)
- Hui-Jie Pan
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Yamei Lin
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore.,School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, 1 Wenyuan Road, Nanjing, 210023, P. R. China
| | - Taotao Gao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Kai Kiat Lau
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Wei Feng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Binmiao Yang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore
| | - Yu Zhao
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore, 117543, Republic of Singapore.,Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, China
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15
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Pan H, Lin Y, Gao T, Lau KK, Feng W, Yang B, Zhao Y. Catalytic Diastereo‐ and Enantioconvergent Synthesis of Vicinal Diamines from Diols through Borrowing Hydrogen. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101517] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Hui‐Jie Pan
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Yamei Lin
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
- School of Food Science and Pharmaceutical Engineering Nanjing Normal University 1 Wenyuan Road Nanjing 210023 P. R. China
| | - Taotao Gao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Kai Kiat Lau
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Wei Feng
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Binmiao Yang
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
| | - Yu Zhao
- Department of Chemistry National University of Singapore 3 Science Drive 3 Singapore 117543 Republic of Singapore
- Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City, Fuzhou 350207 China
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16
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Lin Y, Bu Q, Xu J, Liu X, Zhang X, Lu GP, Zhou B. Hf-MOF catalyzed Meerwein−Ponndorf−Verley (MPV) reduction reaction: Insight into reaction mechanism. Molecular Catalysis 2021. [DOI: 10.1016/j.mcat.2021.111405] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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17
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Lin Y, Lu GP, Zhao X, Cao X, Yang L, Zhou B, Zhong Q, Chen Z. Porous cobalt@N-doped carbon derived from chitosan for oxidative esterification of 5-Hydroxymethylfurfural: The roles of zinc in the synthetic and catalytic process. Molecular Catalysis 2020. [DOI: 10.1016/j.mcat.2019.110695] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Xie C, Ren GL, Xu MC, Zhang WY, Zhang SL, Cai QY, Lin YM, Zhou DL. [The effect of miR-155 on HBV replication and PTEN expression in vivo]. Zhonghua Gan Zang Bing Za Zhi 2019; 26:489-494. [PMID: 30317769 DOI: 10.3760/cma.j.issn.1007-3418.2018.07.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To construct the mmu-miR-155 eukaryotic overexpression vector pmR-155 and to investigate its effect on HBV replication and expression of PTEN in vivo. Methods: The mmu-mir-146a precursor gene fragment pre-mmu-mir-146a was amplified by PCR, then connected to the pmR-mCherry plasmid vector after double enzyme digestion, the accuracy of recombinant vector was verified by colony PCR、double enzyme digestion and sequencing; then the recombinant vector was transfected HBV transgene mice(Experimental Group)with hydrodynamics-based injection via vena caudalis, and pmR-mCherry plasmid、PBS were respectively transfected into the mice as Empty plasmid Group、Blank Group. The concentration of IFN-γ in the serum was detected by ELISA. The expression of SOCS1、PTEN mRNA in the liver was detected by qPCR at 30d post-transfectioned. The Western blot was performed to detect the changes in SOCS1、PTEN、HBX in the liver tissue at 30 d post-transfectioned. The results were analyzed with Student's t-test, or one-way analysis of variance and the least significant difference test. Results: the colony PCR、double enzyme digestion and sequencing verified that the gene was inserted into the pmR-mCherry vector. Compared with Blank Group, the expression of miR-155 in the Experimental Group was significantly increased(t = 8.90, P < 0.01); the concentration of IFN-γ in the Experimental Group was significantly increased(F = 26.58, P < 0.01); the mRNA(F(SOCS1 mRNA) = 19.72, P < 0.01; F(PTEN mRNA) = 7.38, P < 0.05) and protein(F(SOCS1) = 50.30, P < 0.01; F(PTEN) = 129.00, P < 0.01) expression of COCS1、PTEN was significantly decreased in the Experimental group and the protein of HBX was also significantly(F(HBX) = 77.97, P < 0.01). Conclusion: The pmR-155 eukaryotic overexpression vector is successfully constructed, this recombinant vector can express miR-155 stably; miR-155 can down-regulate cocs1、PTEN gene expression and up-regulate the expression of IFN-γ, it can inhibit the replication of HBV and a potential targets to treating hepatocellular carcinoma.
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Affiliation(s)
- C Xie
- Department of Pediatric, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China (Department of Pediatric, the Secon Affiliated Hospital of Guangzhou Medical University)
| | - G L Ren
- Department of Pediatric, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
| | - M C Xu
- Department of Pediatric, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
| | - W Y Zhang
- Department of Clinical Laboratory, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
| | - S L Zhang
- Department of Clinical Laboratory, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
| | - Q Y Cai
- Department of Pediatric, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
| | - Y M Lin
- Department of Pediatric, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou 510010, China
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19
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Lu GP, Lin YM. A Base-Induced Ring-Opening Process of 2-Substituted-1,3,4-Oxadiazoles for the Generation of Nitriles at Room Temperature. Journal of Chemical Research 2019. [DOI: 10.3184/174751914x14007780679741] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Guo-ping Lu
- College of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
| | - Ya-mei Lin
- College of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiaoling Wei, Nanjing 210094, P.R. China
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20
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Lin YM, Druyan S, Yahav S, Brake J. Thermal treatments prior to and during the beginning of incubation affects development of the broiler embryo and yolk sac membranes, and live performance and carcass characteristics. Poult Sci 2018; 96:1939-1947. [PMID: 28339819 DOI: 10.3382/ps/pew467] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 01/12/2017] [Indexed: 12/14/2022] Open
Abstract
This study evaluated temperature during preincubation and embryonic day 0 (E0) E0 to E5 of incubation on broiler embryo development and subsequent live performance. Freshly laid eggs from a single 41-wk-old Ross 708 broiler breeder flock produced on a single day were weighed individually for weight matching purposes, stored overnight, and assigned to 4 treatment combinations of 2 preincubation temperatures (23.9 or 29.4°C) × 2 E0 to E5 temperatures (38.1 or 37.5°C). The 29.4°C preincubation temperature decreased (P ≤ 0.05) yolk sac membrane (YSM) vasculature at E6 and E7, and increased (P ≤ 0.05) embryo weight and length but decreased (P ≤ 0.05) yolk sac weight (YSW) at E15. No subsequent main effects were observed. The 38.1°C incubation temperature increased YSM vasculature at E7, chorioallantoic membrane (CAM) vasculature at E8 and E10, and egg weight loss, embryo weight, and embryo length at E15 and chick length at E21 in the presence of reduced BW and YSW (P ≤ 0.05). This was followed by greater male BW at 35 d, as well as improved FCR in females 0 to 14 d and in males 15 to 35 d (P ≤ 0.05). Pectoralis major and minor yields were increased (P ≤ 0.05) at 50 d of age in males and females, respectively. There were no interactions observed with regards to broiler live performance and carcass yield, which probably negated the importance of the interactions observed for preincubation temperature by E0 to E5 incubation temperature that affected YSM vasculature, CAM vasculature area, egg weight loss, embryo weight, yolk sac weight, and chick length.
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Affiliation(s)
- Y M Lin
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC 27695-7608 USA
| | - S Druyan
- Institute of Animal Science, ARO the Volcani Center, Bet Dagan 50250, Israel
| | - S Yahav
- Institute of Animal Science, ARO the Volcani Center, Bet Dagan 50250, Israel
| | - J Brake
- Prestage Department of Poultry Science, North Carolina State University, Raleigh, NC 27695-7608 USA
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21
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22
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Pronk M, Neu TR, van Loosdrecht MCM, Lin YM. The acid soluble extracellular polymeric substance of aerobic granular sludge dominated by Defluviicoccus sp. Water Res 2017; 122:148-158. [PMID: 28599160 DOI: 10.1016/j.watres.2017.05.068] [Citation(s) in RCA: 16] [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] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 05/28/2017] [Accepted: 05/29/2017] [Indexed: 06/07/2023]
Abstract
A new acid soluble extracellular polymeric substance (acid soluble EPS) was extracted from an acetate fed aerobic granular sludge reactor operated at 35 °C. Acid soluble EPS dominated granules exhibited a remarkable and distinctive tangled tubular morphology. These granules are dominated by Defluviicoccus Cluster II organisms. Acetic acid instead of the usually required alkaline extraction medium was needed to dissolve the granules and solubilise the polymeric matrix. The extracted acid soluble EPS was analysed and identified using various instrumental analysis including 1H and 13C Nuclear Magnetic Resonance, Fourier Transform Infrared Spectroscopy and Raman spectroscopy. In addition, the glycoconjugates were characterized by fluorescence lectin-binding analysis. The acid soluble EPS is α-(1 → 4) linked polysaccharide, containing both glucose and galactose as monomers. There are OCH3 groups connected to the glucose monomer. Transmission and scanning electron microscopy (TEM, SEM) as well as confocal laser scanning microscopy (CLSM) showed that the acid soluble EPS was present as a tightly bound capsular EPS around bacterial cells ordered into a sarcinae-like growth pattern. The special granule morphology is decided by the acid soluble EPS produced by Defluviicoccus Cluster II organisms. This work shows that no single one method can be used to extract all possible extracellular polymeric substances. Results obtained here can support the elucidation of biofilm formation and structure in future research.
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Affiliation(s)
- M Pronk
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629 HZ, Delft, The Netherlands.
| | - T R Neu
- Microbiology of Interfaces, Department River Ecology, Helmholtz Centre for Environmental Research - UFZ, Brueckstrasse 3A, 39114, Magdeburg, Germany.
| | - M C M van Loosdrecht
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629 HZ, Delft, The Netherlands.
| | - Y M Lin
- Department of Biotechnology, Delft University of Technology, van der Maasweg 9, 2629 HZ, Delft, The Netherlands.
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23
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Lin YM, Lu GP, Wang RK, Yi WB. Stereoselective Synthesis of Alkenyl Silanes, Sulfones, Phosphine Oxides, and Nitroolefins by Radical C–S Bond Cleavage of Arylalkenyl Sulfides. Org Lett 2017; 19:1100-1103. [DOI: 10.1021/acs.orglett.7b00126] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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)
- Ya-mei Lin
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Guo-ping Lu
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Rong-kang Wang
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Wen-bin Yi
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
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24
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Lin YM, Lu GP, Wang GX, Yi WB. Acid/Phosphide-Induced Radical Route to Alkyl and Alkenyl Sulfides and Phosphonothioates from Sodium Arylsulfinates in Water. J Org Chem 2016; 82:382-389. [DOI: 10.1021/acs.joc.6b02459] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Ya-mei Lin
- Chemical Engineering College, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Guo-ping Lu
- Chemical Engineering College, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Gui-xiang Wang
- Chemical Engineering College, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
| | - Wen-bin Yi
- Chemical Engineering College, Nanjing University of Science & Technology, Xiaolingwei 200, Nanjing 210094, China
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25
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Lin YM, Lu GP, Wang GX, Yi WB. Odorless, Regioselective Synthesis of Diaryl Sulfides and α-Thioaryl Carbonyls from Sodium Arylsulfinates via
a Metal- Free Radical Strategy in Water. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600846] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Ya-mei Lin
- Chemical Engineering College; Nanjing University of Science and Technology; Nanjing 210094 People's Republic of China
| | - Guo-ping Lu
- Chemical Engineering College; Nanjing University of Science and Technology; Nanjing 210094 People's Republic of China
| | - Gui-xiang Wang
- Chemical Engineering College; Nanjing University of Science and Technology; Nanjing 210094 People's Republic of China
| | - Wen-bin Yi
- Chemical Engineering College; Nanjing University of Science and Technology; Nanjing 210094 People's Republic of China
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26
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Affiliation(s)
- Ya-mei Lin
- Chemical
Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Wen-bin Yi
- Chemical
Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Wan-zhao Shen
- Chemical
Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
| | - Guo-ping Lu
- Chemical
Engineering College, Nanjing University of Science and Technology, Nanjing, 210094, China
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27
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Lin YM, Lu GP, Cai C, Yi WB. Odorless, One-Pot Regio- and Stereoselective Iodothiolation of Alkynes with Sodium Arenesulfinates under Metal-Free Conditions in Water. Org Lett 2015; 17:3310-3. [DOI: 10.1021/acs.orglett.5b01488] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Ya-mei Lin
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
| | - Guo-ping Lu
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
| | - Chun Cai
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
| | - Wen-bin Yi
- Chemical Engineering College, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China
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Abstract
An efficient thia-Michael addition using odorless, easy to synthesis and handle Bunte salts as thiol surrogates is introduced.
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Affiliation(s)
- Ya-mei Lin
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing
- P. R. China
| | - Guo-ping Lu
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing
- P. R. China
| | - Chun Cai
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing
- P. R. China
| | - Wen-bin Yi
- Chemical Engineering College
- Nanjing University of Science & Technology
- Nanjing
- P. R. China
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Lu TH, Chang YT, Lin YM. Implementation of an Automatic Laboratory Data Checking System To Reduce Deduction of Statins Reimbursement in A Teaching Hospital in Taiwan. Value Health 2014; 17:A500. [PMID: 27201511 DOI: 10.1016/j.jval.2014.08.1505] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Affiliation(s)
- T H Lu
- Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Y T Chang
- Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
| | - Y M Lin
- Shuang Ho Hospital, Taipei Medical University, New Taipei City, Taiwan
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Lin YM, Lotti T, Sharma PK, van Loosdrecht MCM. Apatite accumulation enhances the mechanical property of anammox granules. Water Res 2013; 47:4556-4566. [PMID: 23764605 DOI: 10.1016/j.watres.2013.04.061] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [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: 02/03/2013] [Revised: 04/19/2013] [Accepted: 04/27/2013] [Indexed: 06/02/2023]
Abstract
The strength of granular sludge is essential for the mechanical stability of the granules. Inorganic precipitants form a major factor influencing the strength of the granules. To check the possibility of apatite accumulation in anammox granules, and study its contribution to the mechanical strength of granules, anammox granular sludge was collected from Dokhaven municipal wastewater treatment plant, the Netherlands. Mineral precipitation inside the granules was visualized by micro-computed tomography, and apatite was identified by electron probe microanalysis and X-ray powder diffraction. The mechanical strength of anammox granules was measured by a low load compression tester. The contribution of apatite to the mechanical strength was evaluated by the generalized Maxwell model. Ca-PO4 minerals are reported to accumulate in anammox granules. A transformation of Ca-PO4 happens, and apatite is the final stable form. The accumulation of apatite increases the mechanical strength of anammox granules. A fast method to monitor and evaluate the accumulation of minerals in anammox granules was proposed.
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Affiliation(s)
- Y M Lin
- Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628BC Delft, The Netherlands.
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31
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Lin YM, Sharma PK, van Loosdrecht MCM. The chemical and mechanical differences between alginate-like exopolysaccharides isolated from aerobic flocculent sludge and aerobic granular sludge. Water Res 2013; 47:57-65. [PMID: 23084341 DOI: 10.1016/j.watres.2012.09.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 08/21/2012] [Accepted: 09/06/2012] [Indexed: 06/01/2023]
Abstract
This study aimed to investigate differences in the gel matrix of aerobic granular sludge and normal aerobic flocculent sludge. From both types of sludge that fed with the same municipal sewage, the functional gel-forming exopolysaccharides, alginate-like exopolysaccharides, were isolated. These two exopolysaccharides were chemically fractionated, and investigated by FT-IR spectroscopy. The isolated polymers were made into a gel by calcium addition and the mechanical properties of these reconstituted gels were measured by a low load compression tester. The viscoelastic behavior of the gels was described by a generalized Maxwell model. The alginate-like exopolysaccharides derived from aerobic granules had significantly higher amount of poly(guluronic acid) blocks but lower amount of poly(guluronic acid-manuronic acid) blocks in the chemical structure, while the alginate-like exopolysaccharides derived from aerobic flocculent sludge had equal amount of poly(guluronic acid) blocks and poly(guluronic acid-manuronic acid) blocks. These differences result in a perfect gel-forming capability of alginate-like exopolysaccharides derived from aerobic granules and bestowed this exopolysaccharides gel a stronger mechanical property as compared to alginate-like exopolysaccharides derived from aerobic flocculent sludge. The different chemical and mechanical properties of these two exopolysaccharides contributed to the distinguished characteristics between aerobic granular sludge and aerobic flocculent sludge.
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Affiliation(s)
- Y M Lin
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands.
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Lin YM, Bassin JP, van Loosdrecht MCM. The contribution of exopolysaccharides induced struvites accumulation to ammonium adsorption in aerobic granular sludge. Water Res 2012; 46:986-92. [PMID: 22209260 DOI: 10.1016/j.watres.2011.11.072] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Revised: 11/25/2011] [Accepted: 11/29/2011] [Indexed: 05/06/2023]
Abstract
Aerobic granular sludge from a lab-scale reactor with simultaneous nitrification/denitrification and enhanced biological phosphorus removal processes exhibited significant amount of ammonium adsorption (1.5 mg NH4+-N/g TSS at an ammonium concentration of 30 mg N/L). Potassium release accompanied ammonium adsorption, indicating an ion exchange process. The existence of potassium magnesium phosphate (K-struvite) as one of potassium sources in the granular sludge was studied by X-ray diffraction analysis (XRD). Artificially prepared K-struvite was indeed shown to adsorb ammonium. Alginate-like exopolysaccharides were isolated and their inducement for struvite formation was investigated as well. Potassium magnesium phosphate proved to be a major factor for ammonium adsorption on the granular sludge. Struvites (potassium/ammonium magnesium phosphate) accumulate in aerobic granular sludge due to inducing of precipitation by alginate-like exopolysaccharides.
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Affiliation(s)
- Y M Lin
- Department of biotechnology, Delft university of Technology, Julianalaan 67, 2628BC Delft, The Netherlands.
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Ren L, Ji J, Fang Y, Jiang SH, Lin YM, Bo J, Qian JY, Xu XH, Ding XQ. Assessment of urinary N-acetyl-β-glucosaminidase as an early marker of contrast-induced nephropathy. J Int Med Res 2011; 39:647-53. [PMID: 21672370 DOI: 10.1177/147323001103900234] [Citation(s) in RCA: 12] [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: 11/15/2022] Open
Abstract
Early detection and timely intervention are important for improving contrast-induced nephropathy (CIN) prognosis. Whether urinary N-acetyl-β-glucosaminidase (NAG) is a useful marker for early detection of CIN was investigated in 590 patients undergoing diagnostic coronary angiography (CA) and/or therapeutic percutaneous coronary intervention (PCI) for acute coronary syndromes or stable angina, and who received low-osmolality nonionic contrast agent. Urinary NAG, osmolality and serum creatinine were measured before and 1, 2 and 6 days after contrast agent exposure. CIN occurred in 33 patients; its incidence in high-risk patients (pre-existing renal dysfunction with/without diabetes mellitus) was significantly higher than in others. In patients with CIN, urinary NAG and serum creatinine levels on days 1 and 2 were significantly higher than at baseline and compared with patients without CIN; mean levels were gradually returning to baseline by day 6. Compared with serum creatinine, urinary NAG levels peaked earlier in CIN patients and increased much more. The results suggest that, following CA and/or PCI, CIN occurs to a certain degree and that NAG may be a useful early CIN marker as it is noninvasive, simple, inexpensive and sensitive.
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Affiliation(s)
- L Ren
- Department of Nephrology, Zhongshan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
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Wang L, Lin YM. Spore detection in aerobic granules by different dipicolinic acid releasing methods. Bioresour Technol 2007; 98:3164-7. [PMID: 17280830 DOI: 10.1016/j.biortech.2006.10.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2006] [Revised: 10/11/2006] [Accepted: 10/22/2006] [Indexed: 05/13/2023]
Abstract
This work aimed at developing a procedure for spore quantification. Spore content was determined by analyzing dipicolinic acid (dpa) extracted from aerobic granules by 13 methods. Concentrated HCl was able to release dpa completely. Results showed that dpa constituted 33.7 mg per g SS, meaning that about 337 mg per g SS were spores, not the normal vegetative cells.
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Affiliation(s)
- L Wang
- Environmental Science and Engineering College, Ocean University of China, 266100 Qingdao, China
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35
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Lin YM, Chen CN, Yoshinaga T, Tsai SC, Shen ID, Lee TH. Short-term effects of hyposmotic shock on Na+/K+-ATPase expression in gills of the euryhaline milkfish, Chanos chanos. Comp Biochem Physiol A Mol Integr Physiol 2006; 143:406-15. [PMID: 16459117 DOI: 10.1016/j.cbpa.2005.12.031] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2005] [Revised: 12/21/2005] [Accepted: 12/21/2005] [Indexed: 10/25/2022]
Abstract
Changes in expression of gill Na+/K+ -ATPase (NKA) on a short-term (96 h) time-course following hyposmotic shock (direct transfer to fresh water) of the euryhaline, marine milkfish were studied on gene, protein, and cell levels in this paper. Plasma osmolality and [Na+] responded with rapid declines in 3 h post-transfer yet, thereafter, remained constant. Plasma [Cl-] gradually fell to a significantly lower level at 6 h post-transfer. Gills responded to hyposmotic shock by a dual phase enhancement of NKA activity and protein abundance; (a) Before 24 h: NKA activity increased as early as 3 h and reached a maximum level from 6 to 12 h post-transfer coincided with the sustained lower levels of plasma osmolality, [Na+], and [Cl-] since 3 h post-transfer. This was followed by a gradual rise in alpha-subunit protein levels that peaked at 12 h post-transfer. Meanwhile, alpha-mRNA of NKA did no show significant change. (b) After 24 h: NKA activity as well as the amounts of alpha-subunit mRNA and protein increased significantly. Direct freshwater transfer induced a prompt and significant decrease of NKA immunoreactive (NKIR) cell abundance in filaments before 24 h, followed by a significant increase after 24 h due to their development in filaments and lamellae. Increased number of NKIR cells after 24 h of hyposmotic shock may occur in conjunction with rise of NKA activity as well as alpha-subunit mRNA and protein abundance. In conclusion, milkfish is able to avoid an excessive drop in plasma ions immediately upon hyposmotic shock and maintain plasma ions on a marginal lower level in fresh water. Notably, the initial increase in NKA activity (adjustive phase; 3-12 h) and delayed increase in NKA mRNA and protein abundance (regulatory phase; 48-96 h) indicate the importance of a higher level of the gill enzyme in milkfish upon hyposmotic shock.
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Affiliation(s)
- Y M Lin
- Department of Life Sciences, National Chung-Hsing University, Taichung 402, Taiwan
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Abstract
This study explores the possibility of growing lung cells on poly-DL-lactic acid (PDLLA) scaffolds, with a view to in future engineer pulmonary tissue for human implantation. As a first step in this process, the ability of PDLLA to maintain the growth of lung epithelium is tested using a robust cell line. Poly-DL-lactic acid has been investigated in two forms, as planar discs and as 3-D foams, and it has been demonstrated that PDLLA is not only nontoxic to pneumocytes but it also actively supports their growth. The initial findings suggest that the material is an appropriate matrix for engineering of distal lung tissue.
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Affiliation(s)
- Y M Lin
- Department of Materials, Chelsea & Westminster Campus Imperial College, London, UK
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Rao Q, Zheng GG, Lin YM, Wu KF. Production of matrix metalloproteinase-9 by cord blood CD34 + cells and its role in migration. Ann Hematol 2004; 83:409-13. [PMID: 15034761 DOI: 10.1007/s00277-004-0866-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2003] [Accepted: 07/09/2003] [Indexed: 10/26/2022]
Abstract
The transmigration of hematopoietic progenitor cells is a crucial step in the homing of transplanted stem cells into bone marrow (BM) microenvironment; however, the molecular basis for this is not fully understood. Matrix metalloproteinases (MMPs), which are implicated in the migration of leukocytes, are important in degrading components of extracellular matrix molecules. In this study, using zymographic analysis and enzyme-linked immunosorbent assay (ELISA), we investigated the production of MMP-9 in CD34(+) cells from cord blood (CB) and BM, compared their spontaneous migration across a reconstituted basement membrane-coated filter in transwell, and studied the role of MMP-9 in the transmigration. Zymography and ELISA showed that MMP-9 is produced by freshly isolated CD34(+) stem/progenitor cells obtained from CB. CB CD34(+) cells showed significantly higher migrational capacity than BM CD34(+) cells ( p=0.008). Furthermore, the migrational ability of CB CD34(+) cells over the extracellular matrix (ECM) was significantly inhibited by the inhibitor of MMP, o-phenanthroline and anti-MMP-9 monoclonal antibody (73.3+/-11.8% and 37.5+/-10.4% inhibition, respectively). Our results strengthen the potential role of MMP-9 in the higher migrational capacity of CB CD34(+) cells, which may be beneficial to homing of these cells to the BM environment.
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Affiliation(s)
- Q Rao
- Institute of Hematology, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, 300020 Tianjin, China
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Wu CC, Hsieh-Li HM, Lin YM, Chiang HS. Cystic fibrosis transmembrane conductance regulator gene screening and clinical correlation in Taiwanese males with congenital bilateral absence of the vas deferens. Hum Reprod 2004; 19:250-3. [PMID: 14747162 DOI: 10.1093/humrep/deh073] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [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: 11/13/2022] Open
Abstract
BACKGROUND In Taiwan, an area with a very low incidence of cystic fibrosis (CF), we first screened for the most common mutations of the cystic fibrosis transmembrane conductance regulator (CFTR) gene and looked for clinical correlations in 27 patients with clinically diagnosed congenital bilateral absence of the vas deferens (CBAVD). METHODS AND RESULTS The clinical results showed that none of the 27 patients had CF symptoms. We did not detect any definite renal anomaly ultrasonographically. Mutation analysis was carried out on these 27 cases and 46 normal fertile males as controls. No mutations of Delta F508 or R117H were identified in any of the samples analysed. In the screening of IVS8-poly T, five of the 27 CBAVD patients showed the homozygous genotype for 5T/5T, 14 showed the heterozygous genotype for 5T/7T and eight showed the homozygous genotype for 7T/7T. The frequency of 5T alleles was 44.4%, which was significantly higher than in the 46 normal fertile males, for which there was a 5T frequency of 5.4%. CONCLUSIONS The absence of major mutations of CFTR genes could be related to the much lower CF incidence in Taiwan. Further investigations into differences in the mutation spectrum of other CFTR genes are needed for a better understanding of the development of Taiwanese-Oriental CBAVD.
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Affiliation(s)
- C C Wu
- Graduate Institute of Medical Sciences, Taipei Medical University, and Department of Urology, Taipei Medical University Hospital, Taipei, Taiwan
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Lin YM, Chen CN, Lee TH. The expression of gill Na, K-ATPase in milkfish, Chanos chanos, acclimated to seawater, brackish water and fresh water. Comp Biochem Physiol A Mol Integr Physiol 2003; 135:489-97. [PMID: 12829056 DOI: 10.1016/s1095-6433(03)00136-3] [Citation(s) in RCA: 101] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Juvenile milkfish Chanos chanos (Forsskål, 1775) were transferred from a local fish farm to fresh water (FW; 0 per thousand ), brackish water (BW; 10 per thousand, 20 per thousand ) and seawater (SW; 35 per thousand ) conditions in the laboratory and reared for at least two weeks. The blood and gill of the fish adapted to various salinities were analyzed to determine the osmoregulatory ability of this euryhaline species. No significant difference was found in plasma osmolality, sodium or chloride concentrations of milkfish adapted to various salinities. In FW, the fish exhibited the highest specific activity of Na, K-ATPase (NKA) in gills, while the SW group was found to have the lowest. Relative abundance of branchial NKA alpha-subunit revealed similar profiles. However, in contrary to other euryhaline teleosts, i.e. tilapia, salmon and eel, the naturally SW-dwelling milkfish expresses higher activity of NKA in BW and FW. Immunocytochemical staining has shown that most Na, K-ATPase immunoreactive (NKIR) cells in fish adapted to BW and SW were localized to the filaments with very few on the lamellae. Moreover, in FW-adapted milkfish, the number of NKIR cells found on the lamellae increased significantly. Such responses as elevated NKIR cell number and NKA activity are thought to improve the osmoregulatory capacity of the milkfish in hyposaline environments.
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Affiliation(s)
- Y M Lin
- Department of Life Sciences, National Chung-Hsing University, 250 Kuo-Kuang Road, 402 Taichung, Taiwan
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40
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Abstract
The DAZL gene and its homologues are required for the development of male and female germ cells in different species. However, their role in other aspects of human reproduction is not known. We have generated a polyclonal antibody to the DAZL protein and developed a sensitive standard curve quantitative-competitive-RT-PCR assay to characterize the expression of DAZL in the human corpus luteum (CL). DAZL transcripts are expressed in the CL, but the concentrations decreased with advancing luteal phase. In accordance with the mRNA data, DAZL protein was most abundant in the early phase CL. Immunohistochemical staining showed DAZL protein in the cytoplasm of granulosa-luteal cells. The distinct expression pattern of DAZL protein in the human CL may play an important role in the regulation of luteal function.
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Affiliation(s)
- H A Pan
- Department of Obstetrics and Gynecology, National Cheng-Kung University Hospital, Tainan, Taiwan
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Frissel MJ, Deb DL, Fathony M, Lin YM, Mollah AS, Ngo NT, Othman I, Robison WL, Skarlou-Alexiou V, Topcuoğlu S, Twining JR, Uchida S, Wasserman MA. Generic values for soil-to-plant transfer factors of radiocesium. J Environ Radioact 2002; 58:113-128. [PMID: 11820221 DOI: 10.1016/s0265-931x(01)00061-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
There is a need for soil-to-plant transfer factors of radionuclides that take into account all possible crops on all soil varieties to support dose assessment studies. Because only limited experimental data exist for worldwide soil systems, such values should necessarily have a generic character. This paper describes a generic system for 137Cs, mainly based on a reference soil-to-plant transfer factor which depends solely on soil properties such as nutrient status, exchangeable K-content, pH and moisture content. Crops are divided into crop groups, cereals serving as reference group. The transfer of other crop groups can be calculated by multiplying data for cereals by a conversion factor. Existing data present in the IUR (International Union of Radioecologists) databank and in large part the work of a FAO (Food and Agriculture Organisation)/IAEA(International Atomic Energy Agency)/IUR project on tropical systems provided the basis for the derivation of the conversion factors and reference values.
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Affiliation(s)
- Y M Lin
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, Indiana 46556, USA
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Lin YM, Chen CW, Sun HS, Tsai SJ, Hsu CC, Teng YN, Lin JS, Kuo PL. Expression patterns and transcript concentrations of the autosomal DAZL gene in testes of azoospermic men. Mol Hum Reprod 2001; 7:1015-22. [PMID: 11675467 DOI: 10.1093/molehr/7.11.1015] [Citation(s) in RCA: 35] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The DAZ (Deleted in AZoospermia) gene cluster on the Y chromosome is a strong candidate for the azoospermia factor. The DAZ gene was derived from an autosomal homologue, DAZL (DAZ-Like). This study was designed to assess the functional role of DAZL in human spermatogenesis. The expression patterns and mRNA transcript levels of DAZL in the testes of 17 azoospermic men were therefore examined by immunohistochemical staining and quantitative competitive reverse transcription-polymerase chain reaction. DAZL protein was expressed in the cytoplasm of primary spermatocytes and weakly in spermatogonia. It was detected in the testicular tissues of all subjects with germ cells present. The copy number of the DAZL transcript in normal spermatogenesis (n = 4), hypospermatogenesis or maturation arrest (n = 6), and Sertoli cell-only syndrome (n = 7) ranged from 1.22 x 10(6) to 1.63 x 10(6) per ng of RNA, 1.19 x 10(5) to 2.82 x 10(5) per ng of RNA and 2.83 x 10(4) to 1.23 x 10(5) per ng of RNA respectively. DAZL transcripts were lower in men with spermatogenic failure, and a significant difference was found between the three groups (P < 0.0001). This study suggests that DAZL may play an important role in the human spermatogenic processes of both mitosis and meiosis.
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Affiliation(s)
- Y M Lin
- Department of Urology, Institute of Molecular Medicine, National Cheng Kung University, College of Medicine, 138 Sheng-Li Road, Tainan, Taiwan 704
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Abstract
Enlarged iliopectineal bursitis in the hip region, which usually occurs with degenerative, infectious, or traumatic disorders, is relatively rare. Iliopectineal bursitis complicating bipolar hemiarthroplasty is even more rare. Reported here is an unusual case of a patient with an inguinal mass presenting 8 years after bipolar hemiarthroplasty. Enlarged bursitis complicating the hip prosthesis is rare and has been described only anecdotally in the literature. The enlarged iliopectineal bursa arises from the hip, and the most apparent cause of its formation is polyethylene debris. Treatment should be directed at the source of the debris intraarticularly. Wearing of the polyethylene insert was difficult to discern radiographically for this patient; it was seen on the scout film of the computed tomography of the pelvis while evaluating the enlarged bursitis. The scout film of the computed tomography and the two-dimensional reconstruction of computed tomograms of the hip may be helpful in evaluating wearing of the polyethylene insert.
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Affiliation(s)
- Y M Lin
- Department of Orthopedic Surgery, Veterans General Hospital-Taichung, Taiwan
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45
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Abstract
Fibril formation is the basis of amyloid production in a number of disease states, such as Alzheimer's disease, diabetes and immunocytic dyscrasias. Compounds that inhibit fibril formation could be directly relevant to the treatment of amyloid diseases, and may also provide a foundation for the development of interventions in other molecular condensation diseases ranging from sickle cell anemia to atherosclerosis. We developed an economical and convenient high-throughput method for screening compounds against fibril formation in microwell plates. Chalcones, flavonoids and biflavonoids were screened against fibril formation by a recombinant antibody variable domain (V1). Chalcones 6 and 14 were found to demonstrate inhibition at 0.1 microM in 79 microM of protein solution in both test tube and microwell plate assays. The concentration of protein in the microwell plate assay could be as low as 5 microM using ThT as a monitoring agent. Molecular modeling studies indicated that both compounds could be individually docked into a binding site at the monomer-monomer interface of the V(L) protein dimer. These studies suggested that these compounds could potentially stabilize the VL dimer and therefore reduce its tendency to form fibrils. These findings may provide the basis for a new therapeutic approach to prevent or treat amyloid diseases.
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Affiliation(s)
- Y M Lin
- MediChem Life Sciences, Inc., Woodridge, IL 60517, USA.
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Lin YM, Teng YN, Lee PC, Lin YH, Hsu CC, Lin JS, Kuo PL. AZFa candidate gene deletions in Taiwanese patients with spermatogenic failure. J Formos Med Assoc 2001; 100:592-7. [PMID: 11695273] [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: 02/22/2023] Open
Abstract
BACKGROUND AND PURPOSE Deletions of the azoospermia factor subregion a (AZFa) genes in proximal Yq11 are not frequently reported. The majority of AZFa deletions are thought to be associated with more severe testicular phenotypes, such as Sertoli cell-only syndrome. There is a lack of data on AZFa gene deletions in East Asian populations. In this study, we investigated the deletion status of AZFa genes in Taiwanese men with spermatogenic failure. METHODS One hundred and eighty-three consecutive men with severe oligozoospermia or non-obstructive azoospermia were enrolled in this study. Genomic DNA was extracted from peripheral blood samples and polymerase chain reaction (PCR) was performed using primers specific to four AZFa genes: AZFaT1, DFFRY, DBY, and UTY. Sequence-tagged site markers (sY740, sY630, sY86, sY85, sY87, sY709, and sY88) were used to define the position of deletions. One hundred and twenty fertile men with normal spermatogenesis were enrolled as controls. RESULTS Of the 183 patients, two showed single AZFa gene deletions, resulting in an overall frequency of 1.1%. One of these two patients had DFFRY deletion and the other had DBY deletion; their testicular phenotypes were Sertoli cell-only syndrome and hypospermatogenesis, respectively. Neither patient had deletions extending from AZFa through AZFb or AZFc. CONCLUSION Our results suggest that AZFa gene deletion is infrequent in Taiwanese patients with severe oligozoospermia or non-obstructive azoospermia.
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Affiliation(s)
- Y M Lin
- Department of Urology, National Cheng Kung University, College of Medicine, Tainan
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Lin YM, Ono K, Satoh S, Ishiguro H, Fujita M, Miwa N, Tanaka T, Tsunoda T, Yang KC, Nakamura Y, Furukawa Y. Identification of AF17 as a downstream gene of the beta-catenin/T-cell factor pathway and its involvement in colorectal carcinogenesis. Cancer Res 2001; 61:6345-9. [PMID: 11522623] [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: 02/21/2023]
Abstract
To elucidate the molecular mechanism of colorectal carcinogenesis, we have been attempting to isolate genes involved in the beta-catenin/T-cell factor pathway. In the experiments reported here, analysis by cDNA microarray indicated that AF17, a fusion partner of the MLL gene in acute leukemias with t(11;17)(q23;q21), was transactivated according to accumulation of beta-catenin. Expression of AF17 was significantly enhanced in 8 of the 12 colorectal cancer tissues examined. Introduction of a plasmid designed to express AF17 stimulated growth of NIH3T3 cells, and fluorescence-activated cell sorter analysis indicated that the AF17 regulation of cell-cycle progression was occurring mainly at the G(2)-M transition. Our results suggest that the AF17 gene product is likely to be involved in the beta-catenin-T-cell factor/lymphoid enhancer factor signaling pathway and to function as a growth-promoting, oncogenic protein. These findings should aid development of new strategies for diagnosis, treatment, and prevention of colon cancers and acute leukemias by clarifying the pathogenesis of these conditions.
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Affiliation(s)
- Y M Lin
- Laboratory of Molecular Medicine, Human Genome Center, Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
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Abstract
A series of naturally occurring and synthetic biflavonoids was evaluated for inhibitory activity against Mycobacterium tuberculosis H37Rv (Mtb). Compounds 6, 24, and 25 demonstrated 96, 95, and 87% inhibition, respectively, at a screening concentration of 12.5 microg/mL. The type of linkage and the presence of methoxy- and nitro-substituents in biflavonoids may contribute to the observed inhibitory activity. The results of this study represent the discovery of biflavonoids as a potential new class of antituberculosis agent.
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Affiliation(s)
- Y M Lin
- MediChem Life Sciences, Woodridge, IL 60517, USA.
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Chia-Hsien Cheng J, Chuang VP, Cheng SH, Lin YM, Cheng TI, Yang PS, Jian JJ, You DL, Horng CF, Huang AT. Unresectable hepatocellular carcinoma treated with radiotherapy and/or chemoembolization. Int J Cancer 2001; 96:243-52. [PMID: 11474499 DOI: 10.1002/ijc.1022] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The purpose of our study was to evaluate the outcome, patterns of failure, and toxicity for patients with unresectable hepatocellular carcinoma (HCC) treated with radiotherapy, transcatheter arterial chemoembolization (TACE), or combined TACE and radiotherapy. Forty-two patients with unresectable HCC were treated with combined radiotherapy and TACE (TACE+RT group, 17 patients), radiotherapy alone (RT group, 9 patients), or with TACE alone (TACE group, 16 patients). Mean dose of radiation was 46.9 +/- 5.8 Gy in a daily fraction of 1.8 to 2 Gy, directed only to the cancer-involved areas of the liver. TACE was performed with a combination of Lipiodol, doxorubicin, cisplatin, and mitomycin C, followed by Gelfoam or Ivalon embolization. Tumor size was smaller in the TACE group (mean: 5.4 cm) compared with the TACE+RT group (8.6 cm) and the RT group (13.1 cm) (P = 0.0003). The median follow-up was 24 months in the TACE+RT group, 28 months in the RT group, and 23 months in the TACE group. Survival was significantly worse for patients treated with radiotherapy alone due to the selection bias of patients with more advanced disease and compromised condition in this group. In contrast, the TACE+RT and TACE groups had comparable survival (two-year rates: TACE+RT 58%, TACE 56%, P = 0.69). The local control rate for the treated tumors was similar in the TACE+RT and TACE groups (P = 0.11). The intrahepatic recurrence outside the treated tumors was common and similar between these two groups (P = 0.48). The extrahepatic progression-free survival was significantly shorter for patients in the TACE+RT group than in the TACE group (two-year rates: TACE+RT 36%, TACE 100%, P = 0.002). Seven patients died from complications of treatment. Local radiotherapy may be added to treat patients with unresectable HCC, and the control of progression of the treated tumors was promising even in patients with large hepatic tumors. Survival of patients with combined TACE and radiotherapy was similar to that with TACE as the only treatment, while a significant portion of the patients treated with radiotherapy developed extrahepatic metastasis.
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Affiliation(s)
- J Chia-Hsien Cheng
- Department of Radiation Oncology, Koo Foundation Sun Yat-Sen Cancer Center, Taipei, Taiwan.
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Chang CY, Hsieh YH, Lin YM, Hu PY, Liu CC, Wang KH. The organic precursors affecting the formation of disinfection by-products with chlorine dioxide. Chemosphere 2001; 44:1153-1158. [PMID: 11513403 DOI: 10.1016/s0045-6535(00)00285-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The object of this research was to study the formation of disinfection by-products by using chlorine dioxide (ClO2) as a disinfectant reacting with different properties of organic substance in natural aquatic environment. The adsorbent resin (XAD-4, XAD-7) was used to divide the organic matters in raw water into three groups. The influence of the function groups on structure, reaction tendency, and formation of disinfection by-products generated by the reaction of these organic substances with chlorine dioxide was explored. The experimental results show that the three different organic groups formed using adsorbent resin were hydrophobic substance, hydrophilic acid, and non-acid hydrophilics in proportions of 43%, 41%, and 16%, respectively. Within the raw water in our study, the hydrophilic substance had a higher distribution proportion than that described in general articles and journals, which indicates that this water was contaminated with pollution from human beings. The exploration of the reactivity of the three different organic substances with chlorine dioxide shows that the unit consumption of disinfection agent per unit organic matters (represented by ClO2/DOC) is in the following sequence hydrophobic substance > hydrophilic substance > non-acid hydrophilics. It indicated that larger molecular organic precursors had larger consumption of disinfectant. We also discovered that after the reaction of the three different organic substances with chlorine dioxide, the largest amount of disinfection by-products were generated by the non-acid hydrophilics.
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Affiliation(s)
- C Y Chang
- Department of Medical Technology, Chung-Tai Institute of Health Sciences and Technology, Taichung, Taiwan, ROC.
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