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Rong LJ, Ye YT, Lin X, Sun X, Chen S, Zhang J, Zhang L. Structure and optical limiting effects of heterometallic Ag 6@Ti 12 and Ag 8@Ti 12 oxo clusters regulated by alkynyl ligands. Dalton Trans 2024; 53:1947-1950. [PMID: 38214025 DOI: 10.1039/d3dt03941b] [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: 01/13/2024]
Abstract
Heterometallic Ag6@Ti12 and Ag8@Ti12 oxo clusters were prepared through a strategy of protecting polynuclear silver cores by a hollow Ti-O module. The introduction of alkyne ligands has shown significant influence on their structures and optical limiting effects.
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Affiliation(s)
- Li-Jun Rong
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China.
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Yu-Ting Ye
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China.
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Xin Lin
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Xiaohui Sun
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Shumei Chen
- College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, P. R. China.
| | - Jian Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
| | - Lei Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
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Abstract
Twenty-one lignans including three new ones (1, 2 and 13) were isolated from Justicia procumbens. The chemical structures of the new lignans were determined by spectroscopic means including 1D and 2D NMR analysis. These compounds were evaluated for their cytotoxic and anti-HIV activities. The new secoisolariciresinol dimethyl ether acetate (13) exhibited anti-HIV-1 activity with an IC50 value of 5.27 μmol·L-1 and a selective index (SI) value of 2.2. The known arylnaphthalene lignan procumbenoside A (3) and diphyllin (8) demonstrated inhibitory activity against HIV-1 with IC50 values of 4.95 (SI > 6.2) and 0.38 μmol·L-1 (SI = 5.3), respectively.
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Affiliation(s)
- Xin-Ya Xu
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China; Institute of Marine Drugs, Guangxi University of Chinese Medicine, Guangxi 530200, China
| | - Dong-Ying Wang
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China; College of Food Science and Technology, Henan University of Technology, Zhengzhou 450001, China
| | - Chuen-Fai Ku
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - Yang Zhao
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - Han Cheng
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, IL 60612, United States
| | - Kang-Lun Liu
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - Li-Jun Rong
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, IL 60612, United States.
| | - Hong-Jie Zhang
- School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China.
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Wang YL, Song YY, Jiang HC, Li ZM, Zhang D, Rong LJ. Variation of nanoparticle fraction and compositions in two-stage double peaks aging precipitation of Al-Zn-Mg alloy. Nanoscale Res Lett 2018; 13:131. [PMID: 29704071 PMCID: PMC5924510 DOI: 10.1186/s11671-018-2542-1] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 04/17/2018] [Indexed: 06/08/2023]
Abstract
Atom probe tomography (APT) coupling high-resolution transmission electron microscopy (HRTEM) was used to analyze the fraction and compositions of different nanoparticles in two-stage double peaks aging process of Al-Zn-Mg alloy. Al content is found to be closely related to the size of nanoparticles and it can be greater than ~ 50.0 at. % in the nanoparticle with the equivalent radius under ~ 3.0 nm. Correspondingly, Al content of the nanoparticle, with the equivalent radius over ~ 5.0 nm, is measured under ~ 40.0 at. %. Evolution from Guinier-Preston (G.P.) zone to η phase is a growing process where Mg and Zn atoms enter the nanoparticle, therefore rejecting Al atoms. G.P. zones can take up a number fraction of ~ 85.0 and ~ 22.7% of nanoparticles in the first and second peak-aged samples, respectively, and even in the over-aged (T73) sample, they can still be found. As aging time increases, fraction of η' phases monotonically rises to the peak value (~ 54.5%) in the second peak-aged state and then drops, which is significant for the second hardness peak and directly proves their function as the transitional medium. In T73 state, ~ 63.3% nanoparticles compose of η phases, which were measured to still contain ~ 10.2 to ~ 36.4 at. % Al atoms.
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Affiliation(s)
- Y L Wang
- CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - Y Y Song
- CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China
| | - H C Jiang
- CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China.
| | - Z M Li
- CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China
| | - D Zhang
- CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China
- School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China
| | - L J Rong
- CAS Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016, China.
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Yang Y, Cheng H, Yan H, Wang PZ, Rong R, Zhang YY, Zhang CB, Du RK, Rong LJ. A cell-based high-throughput protocol to screen entry inhibitors of highly pathogenic viruses with Traditional Chinese Medicines. J Med Virol 2016; 89:908-916. [PMID: 27704591 PMCID: PMC7167059 DOI: 10.1002/jmv.24705] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2016] [Indexed: 12/03/2022]
Abstract
Emerging viruses such as Ebola virus (EBOV), Lassa virus (LASV), and avian influenza virus H5N1 (AIV) are global health concerns. Since there is very limited options (either vaccine or specific therapy) approved for humans against these viruses, there is an urgent need to develop prophylactic and therapeutic treatments. Previously we reported a high‐throughput screening (HTS) protocol to identify entry inhibitors for three highly pathogenic viruses (EBOV, LASV, and AIV) using a human immunodeficiency virus–based pseudotyping platform which allows us to perform the screening in a BSL‐2 facility. In this report, we have adopted this screening protocol to evaluate traditional Chinese Medicines (TCMs) in an effort to discover entry inhibitors against these viruses. Here we show that extracts of the following Chinese medicinal herbs exhibit potent anti‐Ebola viral activities: Gardenia jasminoides Ellis, Citrus aurantium L., Viola yedoensis Makino, Prunella vulgaris L., Coix lacryma‐jobi L. var. mayuen (Roman.) Stapf, Pinellia ternata (Thunb.) Breit., and Morus alba L. This study represents a proof‐of‐principle investigation supporting the suitability of this assay for rapid screening TCMs and identifying putative entry inhibitors for these viruses. J. Med. Virol. 89:908–916, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Yong Yang
- Shandong University of Traditional Chinese Medicine, Jinan, China.,Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Han Cheng
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Hui Yan
- Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Peng-Zhan Wang
- Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Rong Rong
- Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Ying-Ying Zhang
- Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Cheng-Bo Zhang
- Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Rui-Kun Du
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
| | - Li-Jun Rong
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, Chicago, Illinois
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Li WF, Wang J, Zhang JJ, Song X, Ku CF, Zou J, Li JX, Rong LJ, Pan LT, Zhang HJ. Henrin A: A New Anti-HIV Ent-Kaurane Diterpene from Pteris henryi. Int J Mol Sci 2015; 16:27978-87. [PMID: 26610490 PMCID: PMC4661929 DOI: 10.3390/ijms161126071] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 10/26/2015] [Accepted: 11/13/2015] [Indexed: 12/31/2022] Open
Abstract
Henrin A (1), a new ent-kaurane diterpene, was isolated from the leaves of Pteris henryi. The chemical structure was elucidated by analysis of the spectroscopic data including one-dimensional (1D) and two-dimensional (2D) NMR spectra, and was further confirmed by X-ray crystallographic analysis. The compound was evaluated for its biological activities against a panel of cancer cell lines, dental bacterial biofilm formation, and HIV. It displayed anti-HIV potential with an IC50 value of 9.1 µM (SI = 12.2).
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Affiliation(s)
- Wan-Fei Li
- Guiyang College of Traditional Chinese Medicine, Guiyang 550002, China.
| | - Juan Wang
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong, China.
- School of Public Health, Jilin University, Changchun 130021, China.
| | - Jing-Jie Zhang
- Guiyang College of Traditional Chinese Medicine, Guiyang 550002, China.
| | - Xun Song
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong, China.
| | - Chuen-Fai Ku
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong, China.
| | - Juan Zou
- Guiyang College of Traditional Chinese Medicine, Guiyang 550002, China.
| | - Ji-Xin Li
- Guiyang College of Traditional Chinese Medicine, Guiyang 550002, China.
| | - Li-Jun Rong
- Department of Microbiology and Immunology, College of Medicine, University of Illinois at Chicago, 833 South Wood Street, Chicago, IL 60612, USA.
| | - Lu-Tai Pan
- Guiyang College of Traditional Chinese Medicine, Guiyang 550002, China.
| | - Hong-Jie Zhang
- School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong, China.
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Xu Y, Cao C, Gong X, Rong L. Inhibition of ERK5 enhances cytarabine-induced apoptosis in acute myeloid leukemia cells. Int J Clin Exp Med 2015; 8:6446-6455. [PMID: 26131272 PMCID: PMC4483818] [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: 02/28/2015] [Accepted: 04/01/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND AND AIMS Acute myeloid leukemia (AML) is a fatal hematological malignancy which is resistant to a variety of chemotherapy drugs. Phospho-ERK5 (p-ERK5) plays a novel role in chemoresistance in some cancer cells and this pathway is a central mediator of cell survival and apoptotic regulation. The aim of this study was to investigate the effect of a specific ERK5 small interference RNA (siRNA) on proliferation and the sensitivity of HL-60 acute myeloid leukemia (AML) cells to the chemotherapeutic drug cytarabine. METHODS The cells were transfected with siRNAs using Lipofectamine™ 2000 transfection reagent. Relative ERK5 mRNA and protein levels were measured by quantitative real-time PCR, immunocytochemical assay, and Western blotting, respectively. The cytotoxic effects of cytarabine and ERK5 siRNA, alone and in combination, on leukemic cells were determined using colony formation and MTT assay. Apoptosis was assessed by ELISA cell death assay. RESULTS ERK5 siRNA markedly reduced both mRNA and protein expression levels leading to distinct inhibition of cell proliferation and increased spontaneous apoptosis. Surprisingly, ERK5 siRNA synergistically increased the cell toxic effects of cytarabine. CONCLUSIONS Our study suggests that down-regulation of ERK5 by siRNA can trigger apoptosis and overcome drug resistance of leukemia cells. Therefore, ERK5 siRNA may be an effective adjuvant in AML chemotherapy.
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Affiliation(s)
- Yu Xu
- Department of Haematology, People's Hospital of Linyi Shandong, China
| | - Cuiming Cao
- Department of Medical Laboratory Diagnosis Center, Jinan Central Hospital Jinan, Shandong, China
| | - Xiuchun Gong
- Department of Clinical Laboratory, People's Hospital of Linyi Shandong, China
| | - LiJun Rong
- Department of Clinical Laboratory, People's Hospital of LinYi Shandong, China
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Liu HL, Rong LJ, Zhou B, Wei JC, Zheng QS, Chen PY. [Characterization of murine leukemia virus recombinants that express H5N1 subtype avian influenza virus hemagglutinin glycoproteins]. Sheng Wu Gong Cheng Xue Bao 2005; 21:47-51. [PMID: 15859328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
One highly pathogenic strain of avian influenza virus (AIV) was isolated from goose in China recently, designated as F-3. In order to study the viral entry mechanisms, the hemagglutinin (HA) gene of H5N1 subtype AIV isolate was amplified by RT-PCR, and then cloned into pGEM-T vector and sequenced. The sequencing result has logging in GenBank, the accession number was AY639405. The HA gene of F-3 had a complete open reading frame (ORE) and composed of 1707 nucleotides, coding for 568 amino acids. The deduced amino acid sequence at the cleavage site of the HA protein was RKKR GLF, matched to the characteristic of virulent avian influenza strain. The HA gene were subcloned into pcDNA3, so the plasmid pcDNA-HA can express the HA glycoprotein. Co-transfected pcDNA-HA, pHIT60 (include Murine Leukemia Virus structural genes, namely gag and pol) and pHIT111 (retroviral vector genome,containing LacZ as a reporter) into 293T cells. The retroviral supernatant were harvested 48 hours post-transfection, filtered through 0.45 micromol/L filter. The supernatant were used to analysis the characteristic of the pseudotyping virions by Western blotting and infection test. Western blotting revealed the HA glycoproteins can be expressed on the virions, indicated the glycoproteins were incorporated onto the retroviral virions. Infection test were performed on 293T, NIH3T3 and COS-7, all the three kinds of cells infected were lacZ positive, indicating viral entry, and revealed the pseudotype virions of MuLV-HA were infectious. So the pseudotype system of MuLV particles with AIV Hemagglutinin proteins were setted up and it can be used to study the entry of avian influenza virus isolated from goose in China.
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Affiliation(s)
- Hua-Lei Liu
- Key Lab of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
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Abstract
picA is an Agrobacterium tumefaciens chromosomal locus, identified by Mu d11681 mutagenesis, that is inducible by certain acidic polysaccharides found in carrot root extract. Cloning and genetic analysis of a picA::lacZ fusion defined a region of the picA promoter that is responsible for the induction of this locus. Furthermore, we identified a possible negative regulator of picA expression upstream of the picA locus. This sequence, denoted pgl, has extensive homology to polygalacturonase genes from several organisms and inhibited the induction of the picA promoter when present in multiple copies in A. tumefaciens. DNA sequence analysis indicated at least two long open reading frames (ORFs) in the picA region. S1 nuclease mapping was used to identify the transcription initiation site of picA. Mutation of ORF1, but not ORF2, of the picA locus was responsible for an increased aggregation of A. tumefaciens, forming "ropes" in the presence of pea root cap cells. In addition, a potato tuber disk virulence assay indicated that a preinduced picA mutant was more virulent than was the wild-type control, a further indication that the picA locus regulates the surface properties of the bacterium in the presence of plant cells or plant cell extracts.
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Affiliation(s)
- L J Rong
- Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907
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