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Xu Y, Wang C, Li Z, Zheng X, Kang Z, Lu P, Zhang J, Cao P, Chen Q, Liu X. A chromosome-level haplotype-resolved genome assembly of oriental tobacco budworm (Helicoverpa assulta). Sci Data 2024; 11:461. [PMID: 38710675 DOI: 10.1038/s41597-024-03264-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 04/15/2024] [Indexed: 05/08/2024] Open
Abstract
Oriental tobacco budworm (Helicoverpa assulta) and cotton bollworm (Helicoverpa armigera) are two closely related species within the genus Helicoverpa. They have similar appearances and consistent damage patterns, often leading to confusion. However, the cotton bollworm is a typical polyphagous insect, while the oriental tobacco budworm belongs to the oligophagous insects. In this study, we used Nanopore, PacBio, and Illumina platforms to sequence the genome of H. assulta and used Hifiasm to create a haplotype-resolved draft genome. The Hi-C technique helped anchor 33 primary contigs to 32 chromosomes, including two sex chromosomes, Z and W. The final primary haploid genome assembly was approximately 415.19 Mb in length. BUSCO analysis revealed a high degree of completeness, with 99.0% gene coverage in this genome assembly. The repeat sequences constituted 38.39% of the genome assembly, and we annotated 17093 protein-coding genes. The high-quality genome assembly of the oriental tobacco budworm serves as a valuable genetic resource that enhances our comprehension of how they select hosts in a complex odour environment. It will also aid in developing an effective control policy.
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Affiliation(s)
- Yalong Xu
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Chen Wang
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Zefeng Li
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Xueao Zheng
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Zhengzhong Kang
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Peng Lu
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Jianfeng Zhang
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Peijian Cao
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China
- Beijing Life Science Academy (BLSA), Beijing, 102209, China
| | - Qiansi Chen
- China Tobacco Gene Research Center, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001, China.
- Beijing Life Science Academy (BLSA), Beijing, 102209, China.
| | - Xiaoguang Liu
- Institution Henan International Laboratory for Green Pest Control, Henan Engineering Laboratory of Pest Biological Control, College of Plant Protection, Henan Agricultural University, Zhengzhou, 450000, China.
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Meng Z, Guo Y, Deng S, Xiang Q, Cao J, Zhang Y, Zhang K, Ma K, Xie S, Kang Z. Improving image quality of triple-low-protocol renal artery CT angiography with deep-learning image reconstruction: a comparative study with standard-dose single-energy and dual-energy CT with adaptive statistical iterative reconstruction. Clin Radiol 2024; 79:e651-e658. [PMID: 38433041 DOI: 10.1016/j.crad.2024.01.008] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 01/03/2024] [Accepted: 01/09/2024] [Indexed: 03/05/2024]
Abstract
AIM To investigate the improvement in image quality of triple-low-protocol (low radiation, low contrast medium dose, low injection speed) renal artery computed tomography (CT) angiography (RACTA) using deep-learning image reconstruction (DLIR), in comparison with standard-dose single- and dual-energy CT (DECT) using adaptive statistical iterative reconstruction-Veo (ASIR-V) algorithm. MATERIALS AND METHODS Ninety patients for RACTA were divided into different groups: standard-dose single-energy CT (S group) using ASIR-V at 60% strength (60%ASIR-V), DECT (DE group) with 60%ASIR-V including virtual monochromatic images at 40 keV (DE40 group) and 70 keV (DE70 group), and the triple-low protocol single-energy CT (L group) with DLIR at high level (DLIR-H). The effective dose (ED), contrast medium dose, injection speed, standard deviation (SD), signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of abdominal aorta (AA), and left/right renal artery (LRA, RRA), and subjective scores were compared among the different groups. RESULTS The L group significantly reduced ED by 37.6% and 31.2%, contrast medium dose by 33.9% and 30.5%, and injection speed by 30% and 30%, respectively, compared to the S and DE groups. The L group had the lowest SD values for all arteries compared to the other groups (p<0.001). The SNR of RRA and LRA in the L group, and the CNR of all arteries in the DE40 group had highest value compared to others (p<0.05). The L group had the best comprehensive score with good consistency (p<0.05). CONCLUSIONS The triple-low protocol RACTA with DLIR-H significantly reduces the ED, contrast medium doses, and injection speed, while providing good comprehensive image quality.
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Affiliation(s)
- Z Meng
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China
| | - Y Guo
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China
| | - S Deng
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China
| | - Q Xiang
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China
| | - J Cao
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China
| | - Y Zhang
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China
| | - K Zhang
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China
| | - K Ma
- CT Imaging Research Center, GE HealthCare China, Tianhe District, Huacheng Road 87, Guangzhou, 510623, China
| | - S Xie
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China.
| | - Z Kang
- Department of Radiology, The Third Affiliated Hospital of Sun Yat-sen University, Tianhe District, Tianhe Road, 600, Guangzhou, 510620, China.
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Zheng X, Jiang J, Wang C, Hua Y, Huang H, Xu Y, Wei P, Tao J, Cao P, Kang Z, Li X, Gao Q, Chen Q. NRAMP6c plays a key role in plant cadmium accumulation and resistance in tobacco (Nicotiana tabacum L.). Ecotoxicol Environ Saf 2024; 271:115885. [PMID: 38194857 DOI: 10.1016/j.ecoenv.2023.115885] [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: 09/27/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 01/11/2024]
Abstract
Tobacco plants (Nicotiana tabacum L.) exhibit considerable potential for phytoremediation of soil cadmium (Cd) pollutants, owing to their substantial biomass and efficient metal accumulation capabilities. The reduction of Cd accumulation in tobacco holds promise for minimizing Cd intake in individuals exposed to cigar smoking. NRAMP transporters are pivotal in the processes of Cd accumulation and resistance in plants; however, limited research has explored the functions of NRAMPs in tobacco plants. In this investigation, we focused on NtNRAMP6c, one of the three homologs of NRAMP6 in tobacco. We observed a robust induction of NtNRAMP6c expression in response to both Cd toxicity and iron (Fe) deficiency, with the highest expression levels detected in the roots. Subsequent subcellular localization and heterologous expression analyses disclosed that NtNRAMP6c functions as a plasma membrane-localized Cd transporter. Moreover, its overexpression significantly heightened the sensitivity of yeast cells to Cd toxicity. Through CRISPR-Cas9-mediated knockout of NtNRAMP6c, we achieved a reduction in Cd accumulation and an enhancement in Cd resistance in tobacco plants. Comparative transcriptomic analysis unveiled substantial alterations in the transcriptional profiles of genes associated with metal ion transport, photosynthesis, and macromolecule catabolism upon NtNRAMP6c knockout. Furthermore, our study employed plant metabolomics and rhizosphere metagenomics to demonstrate that NtNRAMP6c knockout led to changes in phytohormone homeostasis, as well as shifts in the composition and abundance of microbial communities. These findings bear significant biological implications for the utilization of tobacco in phytoremediation strategies targeting Cd pollutants in contaminated soils, and concurrently, in mitigating Cd accumulation in tobacco production destined for cigar consumption.
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Affiliation(s)
- Xueao Zheng
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
| | - Jiarui Jiang
- Technology Center, China Tobacco Yunnan Industrial Co. LTD, No. 181 Hongjin Road, Kunming, Yunnan Province 650000, China.
| | - Chen Wang
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
| | - Yingpeng Hua
- School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China.
| | - Haitao Huang
- Technology Center, China Tobacco Yunnan Industrial Co. LTD, No. 181 Hongjin Road, Kunming, Yunnan Province 650000, China.
| | - Yalong Xu
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
| | - Pan Wei
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
| | - Jiemeng Tao
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
| | - Peijian Cao
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
| | - Zhengzhong Kang
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
| | - Xuemei Li
- Technology Center, China Tobacco Yunnan Industrial Co. LTD, No. 181 Hongjin Road, Kunming, Yunnan Province 650000, China.
| | - Qian Gao
- Technology Center, China Tobacco Yunnan Industrial Co. LTD, No. 181 Hongjin Road, Kunming, Yunnan Province 650000, China.
| | - Qiansi Chen
- Zhengzhou Tobacco Research Institute of CNTC, No. 2 Fengyang Street, Zhengzhou, Henan Province 450001, China; Beijing Life Science Academy (BLSA), Beijing 102209, China.
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Fu Y, Forse AC, Kang Z, Cliffe MJ, Cao W, Yin J, Gao L, Pang Z, He T, Chen Q, Wang Q, Long JR, Reimer JA, Kong X. One-dimensional alignment of defects in a flexible metal-organic framework. Sci Adv 2023; 9:eade6975. [PMID: 36763650 PMCID: PMC9916987 DOI: 10.1126/sciadv.ade6975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 01/09/2023] [Indexed: 06/18/2023]
Abstract
Crystalline materials are often considered to have rigid periodic lattices, while soft materials are associated with flexibility and nonperiodicity. The continuous evolution of metal-organic frameworks (MOFs) has erased the boundaries between these two distinct conceptions. Flexibility, disorder, and defects have been found to be abundant in MOF materials with imperfect crystallinity, and their intricate interplay is poorly understood because of the limited strategies for characterizing disordered structures. Here, we apply advanced nuclear magnetic resonance spectroscopy to elucidate the mesoscale structures in a defective MOF with a semicrystalline lattice. We show that engineered defects can tune the degree of lattice flexibility by combining both ordered and disordered compartments. The one-dimensional alignment of correlated defects is the key for the reversible topological transition. The unique matrix is featured with both rigid framework of nanoporosity and flexible linkage of high swellability.
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Affiliation(s)
- Yao Fu
- Department of Physical Medicine and Rehabilitation, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310027, P. R. China
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Alexander C. Forse
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
- Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
| | - Zhengzhong Kang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Matthew J. Cliffe
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Weicheng Cao
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jinglin Yin
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Lina Gao
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Zhenfeng Pang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Tian He
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Qinlong Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Qi Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Jeffrey R. Long
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
- Department of Chemistry, University of California, Berkeley, CA 94720, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
| | - Jeffrey A. Reimer
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720, USA
| | - Xueqian Kong
- Department of Physical Medicine and Rehabilitation, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310027, P. R. China
- Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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Hu J, Sun X, Kang Z, Cheng J. Computational investigation of functional water molecules in GPCRs bound to G protein or arrestin. J Comput Aided Mol Des 2023; 37:91-105. [PMID: 36459325 DOI: 10.1007/s10822-022-00492-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/21/2022] [Indexed: 12/04/2022]
Abstract
G protein-coupled receptors (GPCRs) are membrane proteins constituting the largest family of drug targets. The activated GPCR binds either the heterotrimeric G proteins or arrestin through its activation cycle. Water molecules have been reported to play a role in GPCR activation. Nevertheless, reported studies are focused on the hydrophobic helical bundle region. How water molecules function in GPCR bound either G protein or arrestin is rarely studied. To address this issue, we carried out computational studies on water molecules in both GPCR/G protein complexes and GPCR/arrestin complexes. Using inhomogeneous fluid theory (IFT), we locate all possible hydration sites in GPCRs binding either to G protein or arrestin. We observe that the number of water molecules on the interaction surface between GPCRs and signal proteins are correlated with the insertion depths of the α5-helix from G-protein or "finger loop" from arrestin in GPCRs. In three out of the four simulation pairs, the interfaces of Rhodopsin, M2R and NTSR1 in the G protein-associated systems show more water-mediated hydrogen-bond networks when compared to these in arrestin-associated systems. This reflects that more functionally relevant water molecules may probably be attracted in G protein-associated structures than that in arrestin-associated structures. Moreover, we find the water-mediated interaction networks throughout the NPxxY region and the orthosteric pocket, which may be a key for GPCR activation. Reported studies show that non-biased agonist, which can trigger both GPCR-G protein and GPCR-arrestin activation signal, can result in pharmacologically toxicities. Our comprehensive studies of the hydration sites in GPCR/G protein complexes and GPCR/arrestin complexes may provide important insights in the design of G-protein biased agonists.
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Affiliation(s)
- Jiaqi Hu
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, China
| | - Xianqiang Sun
- AutoDrug Biotech Co. Ltd, No. 58 XiangKe Rd., Pudong New Area, Shanghai, China
| | - Zhengzhong Kang
- AutoDrug Biotech Co. Ltd, No. 58 XiangKe Rd., Pudong New Area, Shanghai, China.
| | - Jianxin Cheng
- Jiangxi Provincial Key Laboratory of Drug Design and Evaluation, School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang, China.
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Li W, Kang Z, Li S, Lin Y, Li Y, Mao Y, Zhang J, Lei T, Wang H, Su Y, Yang Y, Qiu J. 302P A multicenter, open-label, dose-escalation (DE), first-in-human study of VEGFRs and CSF1R inhibitor SYHA1813 in patients (pts) with recurrent high-grade gliomas (HGG) or advanced solid tumors. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.436] [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: 11/16/2022] Open
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Yin J, Kang Z, Fu Y, Cao W, Wang Y, Guan H, Yin Y, Chen B, Yi X, Chen W, Shao W, Zhu Y, Zheng A, Wang Q, Kong X. Molecular identification and quantification of defect sites in metal-organic frameworks with NMR probe molecules. Nat Commun 2022; 13:5112. [PMID: 36042242 PMCID: PMC9427814 DOI: 10.1038/s41467-022-32809-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 08/16/2022] [Indexed: 01/18/2023] Open
Abstract
The defects in metal-organic frameworks (MOFs) can dramatically alter their pore structure and chemical properties. However, it has been a great challenge to characterize the molecular structure of defects, especially when the defects are distributed irregularly in the lattice. In this work, we applied a characterization strategy based on solid-state nuclear magnetic resonance (NMR) to assess the chemistry of defects. This strategy takes advantage of the coordination-sensitive phosphorus probe molecules, e.g., trimethylphosphine (TMP) and trimethylphosphine oxide (TMPO), that can distinguish the subtle differences in the acidity of defects. A variety of local chemical environments have been identified in defective and ideal MOF lattices. The geometric dimension of defects can also be evaluated by using the homologs of probe molecules with different sizes. In addition, our method provides a reliable way to quantify the density of defect sites, which comes together with the molecular details of local pore environments. The comprehensive solid-state NMR strategy can be of great value for a better understanding of MOF structures and for guiding the design of MOFs with desired catalytic or adsorption properties. Defects in porous materials can alter the pore structure and chemical properties. Here authors demonstrate an approach for studying defects in metal-organic frameworks using 31P NMR and probe molecules.
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Affiliation(s)
- Jinglin Yin
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China.,Key Laboratory of Excited-State Materials of Zhejiang Province, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Zhengzhong Kang
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Yao Fu
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Weicheng Cao
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Yiran Wang
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Hanxi Guan
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Yu Yin
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Binbin Chen
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xianfeng Yi
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, 430071, Wuhan, P. R. China
| | - Wei Chen
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, 430071, Wuhan, P. R. China
| | - Wei Shao
- College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, 310014, Hangzhou, China
| | - Yihan Zhu
- College of Chemical Engineering and State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology, Zhejiang University of Technology, 310014, Hangzhou, China
| | - Anmin Zheng
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, 430071, Wuhan, P. R. China
| | - Qi Wang
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China
| | - Xueqian Kong
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, P. R. China. .,Key Laboratory of Excited-State Materials of Zhejiang Province, Zhejiang University, 310027, Hangzhou, P. R. China.
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Chen Q, Jiang Y, Kang Z, Cheng J, Xiong X, Hu CY, Meng Y. Engineering a Feruloyl-Coenzyme A Synthase for Bioconversion of Phenylpropanoid Acids into High-Value Aromatic Aldehydes. J Agric Food Chem 2022; 70:9948-9960. [PMID: 35917470 DOI: 10.1021/acs.jafc.2c02980] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Aromatic aldehydes find extensive applications in food, perfume, pharmaceutical, and chemical industries. However, a limited natural enzyme selectivity has become the bottleneck of bioconversion of aromatic aldehydes from natural phenylpropanoid acids. Here, based on the original structure of feruloyl-coenzyme A (CoA) synthetase (FCS) from Streptomyces sp. V-1, we engineered five substrate-binding domains to match specific phenylpropanoid acids. FcsCIAE407A/K483L, FcsMAE407R/I481R/K483R, FcsHAE407K/I481K/K483I, FcsCAE407R/I481R/K483T, and FcsFAE407R/I481K/K483R showed 9.96-, 10.58-, 4.25-, 6.49-, and 8.71-fold enhanced catalytic efficiency for degrading CoA thioesters of cinnamic acid, 4-methoxycinnamic acid, 4-hydroxycinnamic acid, caffeic acid, and ferulic acid, respectively. Molecular dynamics simulation illustrated that novel substrate-binding domains formed strong interaction forces with substrates' methoxy/hydroxyl group and provided hydrophobic/alkaline catalytic surfaces. Five recombinant E. coli with FCS mutants were constructed with the maximum benzaldehyde, p-anisaldehyde, p-hydroxybenzaldehyde, protocatechualdehyde, and vanillin productivity of 6.2 ± 0.3, 5.1 ± 0.23, 4.1 ± 0.25, 7.1 ± 0.3, and 8.7 ± 0.2 mM/h, respectively. Hence, our study provided novel and efficient enzymes for the bioconversion of phenylpropanoid acids into aromatic aldehydes.
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Affiliation(s)
- Qihang Chen
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian 710119, P.R. China
| | - Yaqin Jiang
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian 710119, P.R. China
| | - Zhengzhong Kang
- AutoDrug Biotech Co. Ltd, No. 58 XiangKe Rd, Pudong New Area, Shanghai 201210, China
| | - Jie Cheng
- Meat Processing Key Laboratory of Sichuan Province, College of Food and Biological Engineering, Chengdu University, Chengdu 610106, P.R. China
| | - Xiaochao Xiong
- Biological Systems Engineering, Washington State University, Pullman, Washington 99163, United States
| | - Ching Yuan Hu
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian 710119, P.R. China
- Department of Human Nutrition, Food and Animal Sciences, College of Tropical Agriculture and Human Resources, University of Hawaii at Manoa, 1955 East-West Road, AgSci. 415J, Honolulu, Hawaii 96822, United States
| | - Yonghong Meng
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, 620 West Changan Avenue, Changan, Xian 710119, P.R. China
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9
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Chen ZP, Wu XF, Zheng BW, Chen QL, Yuan T, Zheng R, Chen JY, Kong WF, Wu S, Kang Z, Ren J, Yang QT. [Application of locating supratrochlear artery and supraorbital artery in combined transfrontal and intranasal endoscopic approaches]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:931-936. [PMID: 36058658 DOI: 10.3760/cma.j.cn115330-20210805-00526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the localization methods of supratrochlear artery (STA) and supraorbital artery (SOA), and to explore the clinical benefit of locating nerve via accompanying vascular localization in combined transfrontal and intranasal endoscopic approaches. Methods: From June 2019 to May 2021, 14 patients, including 11 males and 3 females, aging from 18 to 69 years old, were underwent frontal sinus surgery through the combined transfrontal and intranasal endoscopic approaches in the Department of Otorhinolaryngology Head and Neck Surgery of the Third Affiliated Hospital of Sun Yat-sen University. Before the surgery, localization of STA and SOA was determined by color doppler flow imaging (CDFI), computerized topographic angiography (CTA) and contrast enhanced magnetic resonance angiography (CE-MRA) respectively, and the distances between STA and SOA from facial midline were measured on 28 eyebrows. The position of external incision was determined according to the preoperative localization of STA and SOA. The examination time, cost and postoperative complications of the three methods were recorded. The accuracy of localization at 14 sides was verified by the surgery. GraphPad Prism 8.3 software was used for statistical analysis. Results: STA and SOA could be located by CDFI, CTA and CE-MRA. There was no significant difference in the measurement of the distance between STA and SOA from the facial midline among 3 methods (all P>0.05). Determining the position of external incision according to the localization of STA and SOA could protect both the blood vessels and accompanying nerves. No postoperative complications such as numbness of the forehead skin occurred. The measurement time of CDFI, CTA and CE-MRA was 22.50 (15.75, 30.00), 30.00 (28.00, 34.25) and 48.00 (44.00, 52.75) min (M (Q1, Q3)), respectively (all P<0.05). CDFI incurred the lowest costs and took the shortest time. Conclusions: CDFI is an efficient and economic localization method. The localization of STA and SOA facilitates the precise selection of the position of external incision, protects the accompanying nerve and reduces postoperative complications.
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Affiliation(s)
- Z P Chen
- Department of Ophthalmology and Otorhinolaryngology, the Second People's Hospital of Longgang District, Shenzhen 518112, China
| | - X F Wu
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - B W Zheng
- Department of Ultrasonography, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Q L Chen
- Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - T Yuan
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - R Zheng
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - J Y Chen
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - W F Kong
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - S Wu
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Z Kang
- Department of Radiology, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - J Ren
- Department of Ultrasonography, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
| | - Q T Yang
- Department of Otorhinolaryngology Head and Neck Surgery, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, China
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10
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He SL, Li SJ, Liu M, Ouyang WX, Chen WJ, Zheng X, Jiang T, Tan YF, Kang Z, Qin XM, Yu Y. [Study on the diagnostic value of transient elastography, APRI and FIB-4 for liver fibrosis in children with non-alcoholic fatty liver disease]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:81-86. [PMID: 35152674 DOI: 10.3760/cma.j.cn501113-20210105-00007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To evaluate the diagnostic value of transient elastography, aspartate aminotransferase-to-platelet ratio index (APRI), and fibrosis index based on 4 factors (FIB-4) for liver fibrosis in children with non-alcoholic fatty liver disease (NAFLD). Methods: A retrospective study was conducted on 100 cases of nonalcoholic fatty liver disease in Hunan Children's Hospital between August 2015 to October 2020 to collect liver tissue pathological and clinical data. The receiver operating characteristic curve (ROC curve) was used to analyze the diagnostic value of liver stiffness measurement (LSM), APRI and FIB-4 in the diagnosis of different stages of liver fibrosis caused by NAFLD in children. Results: The area under the ROC curve (AUC) value of LSM, APRI and FIB-4 for diagnosing liver fibrosis (S≥1) were 0.701 [95% confidence interval (CI): 0.579 ~ 0.822, P = 0.011], 0.606 (95%CI: 0.436 ~ 0.775, P = 0.182), and 0.568 (95%CI: 0.397 ~ 0.740, P = 0.387), respectively. The best cut-off values were 6.65 kPa, 21.20, and 0.18, respectively. The AUCs value of LSM, APRI, and FIB-4 for diagnosing significant liver fibrosis (S≥ 2) were 0.660 (95% CI: 0.552 ~ 0.768, P = 0.006), 0.578 (95% CI: 0.464 ~ 0.691, P = 0.182) and 0.541 (95% CI: 0.427 ~ 0.655, P = 0.482), respectively. The best cut-off values were 7.35kpa, 24.78 and 0.22, respectively. The AUCs value of LSM, APRI and FIB-4 for the diagnosis of advanced liver fibrosis (S≥ 3) were 0.639 (95% CI: 0.446 ~ 0.832, P = 0.134), 0.613 (95% CI: 0.447 ~ 0.779, P = 0.223) and 0.587 (95% CI: 0.411 ~ 0.764, P = 0.346), respectively. The best cut-off values were 8.55kpa, 26.66 and 0.27, respectively. Conclusion: The transient elastography technique has a better diagnostic value than APRI and FIB-4 for liver fibrosis in children with NAFLD.
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Affiliation(s)
- S L He
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - S J Li
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - M Liu
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - W X Ouyang
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - W J Chen
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - X Zheng
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - T Jiang
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - Y F Tan
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - Z Kang
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - X M Qin
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
| | - Y Yu
- Liver Disease Center of Hunan Children's Hospital, Changsha 410000, China
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11
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Pie N, Bettadpur SV, Tamisiea M, Krichman B, Save H, Poole S, Nagel P, Kang Z, Jacob G, Ellmer M, Fahnestock E, Landerer FW, McCullough C, Yuan D, Wiese DN. "Time Variable Earth Gravity Field Models From the First Spaceborne Laser Ranging Interferometer". J Geophys Res Solid Earth 2021; 126:e2021JB022392. [PMID: 35865454 PMCID: PMC9286545 DOI: 10.1029/2021jb022392] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 10/06/2021] [Accepted: 11/05/2021] [Indexed: 06/15/2023]
Abstract
The Gravity Recovery and Climate Experiment Follow-On (GRACE-FO), launched May 22, 2018 and collecting science data since June 2018, is extending the 15-year data record of Earth mass change established by its predecessor GRACE mission (2002-2017). The GRACE-FO satellites carry onboard a novel technology demonstration instrument for intersatellite ranging, the Laser Ranging Interferometer (LRI), in addition to the microwave interferometer (MWI) carried on GRACE. The LRI has out-performed its in-orbit performance requirements both in terms of accuracy as well as the duration of tracking. Here, we compare and validate LRI-based gravity solutions for January 2019 to September 2020 against the MWI solutions. The comparison between the two sets of gravity solutions shows great similarities in general and nearly perfect consistency at a large hydrologic basin spatial scale (100,000 km2 and above), commonly viewed as the spatial resolution established by GRACE. The comparison in the spectral domain shows differences at the higher degrees of the spectrum, with lower error in the zonal and near zonal terms for the LRI solutions. We conclude that the LRI observations can be used to recover time-varying gravity signals to at least the level of accuracy established by the MWI-based solutions. This is a promising finding, especially when considering the benefits of using the LRI over the MWI, such as the great stability of the instrument and the low occurrence of instrument reboot events.
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Affiliation(s)
- N. Pie
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - S. V. Bettadpur
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - M. Tamisiea
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - B. Krichman
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - H. Save
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - S. Poole
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - P. Nagel
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - Z. Kang
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - G. Jacob
- Center for Space Research (CSR)The University of Texas at AustinAustinTXUSA
| | - M. Ellmer
- Jet Propulsion Laboratory (JPL)California Institute of TechnologyPasadenaCAUSA
| | - E. Fahnestock
- Jet Propulsion Laboratory (JPL)California Institute of TechnologyPasadenaCAUSA
| | - F. W. Landerer
- Jet Propulsion Laboratory (JPL)California Institute of TechnologyPasadenaCAUSA
| | - C. McCullough
- Jet Propulsion Laboratory (JPL)California Institute of TechnologyPasadenaCAUSA
| | - D.‐N. Yuan
- Jet Propulsion Laboratory (JPL)California Institute of TechnologyPasadenaCAUSA
| | - D. N. Wiese
- Jet Propulsion Laboratory (JPL)California Institute of TechnologyPasadenaCAUSA
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12
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Chen B, Kang Z, Zheng E, Liu Y, Gauld JW, Wang Q. Hydrolysis Mechanism of the Linkers by Matrix Metalloproteinase-9 Using QM/MM Calculations. J Chem Inf Model 2021; 61:5203-5211. [PMID: 34649435 DOI: 10.1021/acs.jcim.1c00825] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Activatable cell-penetrating peptides (ACPPs) are known to be able to decrease the cytotoxicity of cell-penetrating peptide (CPP)-based drug delivery systems. Furthermore, they can improve the targeting of CPPs when specifically recognized and hydrolyzed by characteristic proteases. A comprehensive and profound understanding of the recognition and hydrolysis process will provide a better design of the ACPP-based drug delivery system. Previous studies have clearly described how ACPPs are recognized and bound by MMPs. However, the hydrolysis mechanism of ACPPs is still unsolved. This work focuses on a proteinase-sensitive cleavable linker of ACPPs (PLGLAG), the key structure for recognition and hydrolysis, trying to determine the mechanism by which MMP-9 hydrolyzes its substrate PLGLAG. The quantum mechanics/molecular mechanics (QM/MM) calculations herein show that MMP-9 proteolysis is a water-mediated four-step reaction. More specifically, it consists of (i) nucleophilic attack, (ii) hydrogen-bond rearrangement, (iii) proton transfer, and finally (iv) amide bond rupture. Considering the reversibility of multistep reaction, the second step (i.e., hydrogen-bond rearrangement) has the highest barrier and is the rate-limiting step in the hydrolysis of PLGLAG. The possible design and improvement of the key P1 and P1' sites are also explored through mutations. The present results indicate that, while the mutations affect the reaction energy barriers and the rate-limiting steps, all mutants considered could be hydrolyzed by MMP-9. To provide further insights, the hydrolysis mechanism of MMP-2, which has a similar hydrolysis process to that of MMP-9 but with different reaction barriers, is also studied and compared. As a result, this work provides detailed insights into the hydrolysis mechanism of ACPPs by MMP-9 and, thus, also possible insights for the development of new strategies for ACPP-based delivery systems.
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Affiliation(s)
- Binbin Chen
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Zhengzhong Kang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - En Zheng
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - Yingchun Liu
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
| | - James W Gauld
- Department of Chemistry and Biochemistry, University of Windsor, Windsor N9B 3P4, Canada
| | - Qi Wang
- Department of Chemistry, Zhejiang University, Hangzhou 310027, China
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13
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Zhang B, Kang Z, Zhang J, Kang Y, Liang L, Liu Y, Wang Q. Simultaneous binding mechanism of multiple substrates for multidrug resistance transporter P-glycoprotein. Phys Chem Chem Phys 2021; 23:4530-4543. [PMID: 33595579 DOI: 10.1039/d0cp05910b] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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
P-glycoprotein (P-gp), a member of ATP-binding cassette (ABC) transporters, is a multidrug resistance pump. Its promiscuous nature is the main cause of multidrug resistance in cancer cells. P-gp can bind multiple drug molecules simultaneously; however, the binding mechanism is still not clear. Furthermore, the upper limit of the number of substrates that can be accommodated by the binding pocket is not fully understood. In this work, we explore the dynamic process of P-gp binding to multiple substrates by using molecular dynamics (MD) simulations. Our results show that P-gp possesses the ability for simultaneous binding, and that the number of substrates has an upper limit. The accommodating ability of P-gp relates to the size of the binding drugs, and conforms to induced fit theory. In the binding process, the residues 339PHE, 982MET and 986GLN are essential. The pocket of P-gp presents strong flexibility and adaptability features according to the mutation results in this work. Drug molecules tend to gather in the pocket during binding, and interactions between these molecules are beneficial to simultaneous binding. These findings provide new insights into the mechanism of the promiscuous nature of P-gp, and may give us a guideline for inhibiting the process of multidrug resistance.
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Affiliation(s)
- Bo Zhang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou 310027, People's Republic of China.
| | - Zhengzhong Kang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou 310027, People's Republic of China.
| | - Junqiao Zhang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou 310027, People's Republic of China.
| | - Yu Kang
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou 310058, People's Republic of China
| | - Lijun Liang
- College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, Hangzhou, People's Republic of China
| | - Yingchun Liu
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou 310027, People's Republic of China.
| | - Qi Wang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou 310027, People's Republic of China.
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14
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Fu Y, Kang Z, Cao W, Yin J, Tu Y, Li J, Guan H, Wang Y, Wang Q, Kong X. Defect-Assisted Loading and Docking Conformations of Pharmaceuticals in Metal-Organic Frameworks. Angew Chem Int Ed Engl 2021; 60:7719-7727. [PMID: 33400342 DOI: 10.1002/anie.202010231] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Indexed: 12/16/2022]
Abstract
Understanding of drug-carrier interactions is essential for the design and application of metal-organic framework (MOF)-based drug-delivery systems, and such drug-carrier interactions can be fundamentally different for MOFs with or without defects. Herein, we reveal that the defects in MOFs play a key role in the loading of many pharmaceuticals with phosphate or phosphonate groups. The host-guest interaction is dominated by the Coulombic attraction between phosphate/phosphonate groups and defect sites, and it strongly enhances the loading capacity. For similar molecules without a phosphate/phosphonate group or for MOFs without defects, the loading capacity is greatly reduced. We employed solid-state NMR spectroscopy and molecular simulations to elucidate the drug-carrier interaction mechanisms. Through a synergistic combination of experimental and theoretical analyses, the docking conformations of pharmaceuticals at the defects were revealed.
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Affiliation(s)
- Yao Fu
- Center for Chemistry of High-Performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China.,Department of Rehabilitation, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Zhengzhong Kang
- Center for Physical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China.,Department of Theoretical Chemistry and Biology, KTH Royal Institute of Technology, 10691, Stockholm, Sweden
| | - Weicheng Cao
- Center for Chemistry of High-Performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Jinglin Yin
- Center for Chemistry of High-Performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yaoquan Tu
- Department of Theoretical Chemistry and Biology, KTH Royal Institute of Technology, 10691, Stockholm, Sweden
| | - Jianhua Li
- Department of Rehabilitation, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Hanxi Guan
- Center for Chemistry of High-Performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Yiran Wang
- Center for Chemistry of High-Performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Qi Wang
- Center for Physical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xueqian Kong
- Center for Chemistry of High-Performance and Novel Materials, Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China.,Department of Rehabilitation, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, 310027, P. R. China
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15
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Choi I, Park SY, Lee SW, Kang Z, Jin YS, Kim IW. Dissolution enhancement of sorafenib tosylate by co-milling with tetradecanol post-extracted using supercritical carbon dioxide. Pharmazie 2020; 75:13-17. [PMID: 32033627 DOI: 10.1691/ph.2020.9120] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Sorafenib (SOR) is an important multikinase inhibitor for the treatment of cancers. It is commercially available (Nexavar from Bayer) in the form of sorafenib tosylate (SORt) due to its very low solubility. Studies have been made to further improve the dissolution behavior of the tosylate form (SORt), which could ultimately moderate the currently high daily dose. In the present study, SORt nanoparticles (SORt-NP) were prepared through a process that combined two industrially well-accepted techniques of co-milling and supercritical extraction. SORt was co-milled with hydrophilic polymers and tetradecanol, and the tetradecanol was post-extracted using supercritical carbon dioxide. The process enabled the formation of SORt-NP without using any toxic organic solvents, and the drug/excipient ratio (1:0.38) was substantially higher than determined in other studies (1:5.4-10). The enhanced dissolution behavior of SORt-NP was possible with an optimized number of milling cycles. Combining co-milling and supercritical extraction was able to form overall porous network structures with reduced crystallite size, which accelerated the dissolution of SORt-NP. The current method could be easily extended to other poorly soluble drugs as a general approach to improve their dissolution behaviors.
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16
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Zhang B, Zhang J, Kang Z, Liang L, Liu Y, Wang Q. On interactions of P-glycoprotein with various anti-tumor drugs by binding free energy calculations. J Biomol Struct Dyn 2020; 39:5335-5347. [PMID: 32608321 DOI: 10.1080/07391102.2020.1786456] [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] [Indexed: 10/24/2022]
Abstract
P-glycoprotein (P-gp, MDR1), one of ATP-binding cassette transporters, may confer tumor cells cross-resistance to chemotherapeutics. A large amount of P-gp inhibitors were designed to inhibit the multidrug resistance (MDR) feature of P-gp. However, no sufficient researches were reported to explore the correlation between binding capacity and drug property by experiment. Without particular drug property found to inhibit the MDR feature of P-gp, the orientation of drug design is indefinite. In this work, 10 representative cancer drugs with various properties are used to bind with P-gp by molecular dynamics simulation. Binding free energy between P-gp and 10 drugs ranges -139 to -253 kJ/mol. It reveals that the promiscuity nature of P-gp is in light of the similar binding free energy in separate P-gp-ligand binding systems. The binding effect of P-gp and drugs correlates well with the size of drugs and has no apparent correlation with the polarity of each drug. The key reason is that van der Waal's interaction occupies most of the total binding free energy, and it is led by the number of atoms in the drugs. Two transmembrane segments (TM6 and TM12) and three types of amino acids (PHE, MET, and GLN) are vital in binding drugs with van der Waal's energy, which evident the influence between binding stability and size of drugs. This work provides the cause and theoretical basis for the promiscuity nature of P-gp.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Bo Zhang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, People's Republic of China
| | - Junqiao Zhang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, People's Republic of China
| | - Zhengzhong Kang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, People's Republic of China
| | - Lijun Liang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, People's Republic of China.,College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, Hangzhou, People's Republic of China
| | - Yingchun Liu
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, People's Republic of China
| | - Qi Wang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, People's Republic of China
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17
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Yao C, Kang Z, Yu B, Chen Q, Liu Y, Wang Q. All-Factor Analysis and Correlations on the Transmembrane Process for Arginine-Rich Cell-Penetrating Peptides. Langmuir 2019; 35:9286-9296. [PMID: 31265309 DOI: 10.1021/acs.langmuir.9b01169] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Currently, arginine-rich cell-penetrating peptides (CPPs), due to their little cytotoxicity and high transmembrane efficiency, are considered as one of the important intracellular carriers. Although the mechanism of the transmembrane process for arginine-rich CPPs was proposed, the quantitative correlations and the key factors involved in this process still deserve further investigation. In this study, all-atom molecular dynamics and the umbrella sampling technique were employed to study the arginine-rich CPPs transmembrane process. In the adsorption process of CPPs from solution to the surface of the lipid bilayer, the adsorption free energy (ΔGA) is found to be linearly related to the interaction energy change (ΔEA): ΔGA = 0.0426ΔEA + 36.7, R2 = 0.92. In the CPPs transmembrane process, the transmembrane free energy barrier (ΔGB) is roughly correlated with the corresponding interaction energy change (ΔEB): ΔGB = 0.108ΔEB +135, R2 = 0.73. The multiple salt bridges of guanidinium-PO4 account for 65% of the overall interaction energy, so the increased negative charges of the lipid bilayer or more salt bridges would facilitate CPPs adsorption and transmembrane processes. Also, the increased negative charges of the lipid bilayer would reduce the amount of water to be carried into the pore and further reduce the ΔGB. The peptide backbone would not have a direct impact on transmembrane efficiency. The ΔGB is also found to be related to the length of the pore (L): ΔGB = 46.2L - 31.3, R2 = 0.92, which makes the transmembrane efficiency estimable. This work is expected to deliver an in-depth understanding and help the optimization of CPPs.
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Affiliation(s)
- Cai Yao
- Department of Chemistry and Soft Matter Research Center , Zhejiang University , Hangzhou 310027 , China
| | - Zhengzhong Kang
- Department of Chemistry and Soft Matter Research Center , Zhejiang University , Hangzhou 310027 , China
| | - Bin Yu
- Department of Chemistry and Soft Matter Research Center , Zhejiang University , Hangzhou 310027 , China
| | - Qu Chen
- School of Biological and Chemical Engineering , Zhejiang University of Science and Technology , Hangzhou 310023 , China
| | - Yingchun Liu
- Department of Chemistry and Soft Matter Research Center , Zhejiang University , Hangzhou 310027 , China
| | - Qi Wang
- Department of Chemistry and Soft Matter Research Center , Zhejiang University , Hangzhou 310027 , China
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18
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Abstract
Metal-organic frameworks (MOFs) are porous crystalline materials with promising applications in molecular adsorption, separation, and catalysis. It has been discovered recently that structural defects introduced unintentionally or by design could have a significant impact on their properties. However, the exact chemical composition and structural evolution under different conditions at the defects are still under debate. In this study, we performed multidimensional solid-state nuclear magnetic resonance (SSNMR) coupled with computer simulations to elucidate an important scenario of MOF defects, uncovering the dynamic interplay between residual acetate and water. Acetate, as a defect modulator, and water, as a byproduct, are prevalent defect-associated species, which are among the key factors determining the reactivity and stability of defects. We discovered that acetate molecules coordinate to a single metal site monodentately and pair with water at the neighboring position. The acetates are highly flexible, which undergo fast libration as well as a slow kinetic exchange with water through dynamic hydrogen bonds. The dynamic processes under variable temperatures and different hydration levels have been quantitatively analyzed across a broad time scale from microseconds to seconds. The integration of SSNMR and computer simulations allows a precision probe into defective MOF structures with intrinsic dynamics and disorder.
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Affiliation(s)
- Yao Fu
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , People's Republic of China
- Department of Chemical and Biomolecular Engineering , University of California , Berkeley , California 94720 , United States
| | - Zhengzhong Kang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , People's Republic of China
- Department of Theoretical Chemistry and Biology , KTH Royal Institute of Technology , Stockholm SE-10691 , Sweden
| | - Jinglin Yin
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , People's Republic of China
| | - Weicheng Cao
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , People's Republic of China
| | - Yaoquan Tu
- Department of Theoretical Chemistry and Biology , KTH Royal Institute of Technology , Stockholm SE-10691 , Sweden
| | - Qi Wang
- Department of Chemistry , Zhejiang University , Hangzhou 310027 , People's Republic of China
| | - Xueqian Kong
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry , Zhejiang University , Hangzhou 310027 , People's Republic of China
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Xue Z, Sun Q, Zhang L, Kang Z, Liang L, Wang Q, Shen JW. Graphene quantum dot assisted translocation of drugs into a cell membrane. Nanoscale 2019; 11:4503-4514. [PMID: 30806416 DOI: 10.1039/c8nr10091h] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Graphene quantum dots (GQDs) are increasingly being recognized as anti-cancer drug carriers, e.g., doxorubicin delivery, in many experiments. In this work, the structure, thermodynamics and dynamic properties of model drugs (doxorubicin and deoxyadenosine) translocating into a POPC lipid membrane with the assistance of GQDs were investigated via MD simulation and free energy calculation. The simulation results imply that GQD19 can facilitate the permeation of model drugs into the lipid membrane on the nanosecond timescale with less deformation of the cell membrane structure. More importantly, free energy calculations further revealed that the translocation free energy of doxorubicin or deoxyadenosine permeating into the lipid bilayer could be significantly reduced with the assistance of GQD19. Our results suggest that GQDs with appropriate size may assist in the drug delivery process by reducing the translocation free energy permeating into the biomembrane. These results may promote the molecular design and application of GQD-based drug delivery systems.
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Affiliation(s)
- Zhengyang Xue
- Department of Chemistry, Zhejiang University, Hangzhou 310027, People's Republic of China.
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20
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Yao C, Chen B, Kang Z, Liu Y, Qi X, Wang Q. Binding, selectivity and sequence recognition of matrix metalloproteinase-2 to oligopeptides. J Biomol Struct Dyn 2019; 38:275-282. [DOI: 10.1080/07391102.2019.1578694] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Cai Yao
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, China
| | - Binbin Chen
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, China
| | - Zhengzhong Kang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, China
| | - Yingchun Liu
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, China
| | - Xianrong Qi
- School of Pharmaceutical Sciences, Peking University, Beijing, China
| | - Qi Wang
- Department of Chemistry and Soft Matter Research Center, Zhejiang University, Hangzhou, China
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21
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Kang Z, Zhu Y, Zhang QA, Dong L, Xu F, Zhang X, Guan M. Methylation and expression analysis of mismatch repair genes in extramammary Paget's disease. J Eur Acad Dermatol Venereol 2019; 33:874-879. [PMID: 30784122 DOI: 10.1111/jdv.15404] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 11/21/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Extramammary Paget's disease (EMPD) is a rare skin cancer with relative high frequencies of germline and somatic mismatch repair (MMR) genes mutations. However, the methylation and expression of these genes have not been validated in EMPD. OBJECTIVE This study aims to confirm the methylation and expression of MMR genes in EMPD. METHODS Immunohistochemical (IHC) staining detection and Methylation-specific PCR (MSP) were used to analyse MLH1, MSH2, MSH6 and PMS2 proteins' expression and promoters' methylation in 57 EMMD samples, and pyro-sequence was used to find highly methylated CpG sites in MSH2 promoter. RESULTS Immunohistochemical detection displayed reduced expression of MSH2 in 38.6% EMPD cases but normal expression of MLH1, MSH6 and PMS2 in all tumour tissues. Hypermethylation also was found in the promoter of MSH2 but not in other MMR genes. Pyrosequencing of MSH2 promoter showed CpG6 (-87) and CpG3 (-98) were the most common two methylated CpG dinucleotides. There is a significant correlation between reduced MSH2 expression and MSH2 methylation. CONCLUSION Reduced MSH2 expression and hypermethylation in this gene promoter were common genetic changes in EMPD, which expands our understanding of the role of MMR function in this skin cancer.
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Affiliation(s)
- Z Kang
- Department of Laboratory Medicine, Huashan Hospital, Fudan University, Shanghai, P. R. China
| | - Y Zhu
- Department of Pathology, Huashan Hospital North, Fudan University, Shanghai, P. R. China
| | - Q-A Zhang
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, P. R. China
| | - L Dong
- Department of Laboratory Medicine, Huashan Hospital, Fudan University, Shanghai, P. R. China
| | - F Xu
- Department of Dermatology, Huashan Hospital, Fudan University, Shanghai, P. R. China
| | - X Zhang
- Central Laboratory, Huashan Hospital, Fudan University, Shanghai, P. R. China
| | - M Guan
- Department of Laboratory Medicine, Huashan Hospital, Fudan University, Shanghai, P. R. China.,Central Laboratory, Huashan Hospital, Fudan University, Shanghai, P. R. China
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22
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Abstract
Objective: To estimate the choroidal thickness (CT) in healthy children aged 2-6 years old and its relation to axial length, age and gender. Methods: Cross-sectional study. CT was assessed using spectral domain optical coherence tomography (OCT) in 126 children aged 2 to 6 years. CT was measured at nine locations, including the subfovea and 1 mm and 3 mm nasal, temporal, superior and inferior to the fovea. Results: Mean subfoveal choroidal thickness (SFCT) was 331.56±62.03 μm. The choroid was thickest at the subfoveal and 1 mm temporal area, and thinner nasally compared to temporally, superiorly and inferiorly. No statistical significance of SFCT between male and female was noted. Stepwise multiple regression analysis revealed that axial length and age were associated significantly with SFCT (P=0.00), while there was no detectable effect of sex on SFCT (P=0.94). Conclusions: Choroidal thickness was negatively correlated to axial length and positively correlated to age in preschool children. The development of the choroid in early childhood offset the effect of the expansion of eyes. Gender played a minor role in the choroidal development in early childhood. (Chin J Ophthalmol, 2019, 55:111-114).
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Affiliation(s)
- Z Kang
- Xiamen Pediatric Hospital Affiliated to Fudan University, Xiamen Children's Hospital, Xiamen 361000, China
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23
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Miao J, Wei X, Kang Z, Gao Y, Yu X. MYOFIBRILLAR AND DISTAL MYOPATHIES. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.300] [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: 12/01/2022]
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24
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Han J, Ji Y, Wang H, Cao D, Kang Z, Zhu J. Hydrocephalus combined with acute communicating syringomyelia resulting from aneurysmal subarachnoid hemorrhage: A case report. Rev Neurol (Paris) 2018; 174:175-177. [DOI: 10.1016/j.neurol.2017.06.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 05/27/2017] [Accepted: 06/15/2017] [Indexed: 10/18/2022]
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25
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Wang B, Wang N, Song N, Wang W, Wang J, Wang X, Kang Z. Overexpression of AtPAD4 in transgenic Brachypodium distachyon enhances resistance to Puccinia brachypodii. Plant Biol (Stuttg) 2017; 19:868-874. [PMID: 28836326 DOI: 10.1111/plb.12616] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 08/21/2017] [Indexed: 06/07/2023]
Abstract
Brachypodium distachyon (L.) has recently emerged as a model for temperate grasses for investigating the molecular basis of plant-pathogen interactions. Phytoalexin deficient 4 (PAD4) plays a regulatory role in mediating expression of genes involved in plant defence. In this research, we generated transgenic B. distachyon plants constitutively overexpressing AtPAD4. Two transgenic B. distachyon lines were verified using PCR and GUS phenotype. Constitutive expression of AtPAD4 in B. distachyon enhanced resistance to Puccinia brachypodii. P. brachypodii generated less urediniospores on transgenic than on wild-type plants. AtPAD4 overexpression enhanced salicylic acid (SA) levels in B. distachyon-infected tissues. qRT-PCR showed that expression of pathogenesis-related 1 (PR1) and other defence-related genes were up-regulated in transformed B. distachyon following infection with P. brachypodii. Our results indicate that AtPAD4 overexpression in B. distachyon plants led to SA accumulation and induced PR gene expression that reduced the rate of colonisation by P. brachypodii.
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Affiliation(s)
- B Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Sciences, Northwest A & F University, Yangling, Shaanxi, China
| | - N Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
| | - N Song
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
| | - W Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
| | - J Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
| | - X Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
| | - Z Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A & F University, Yangling, Shaanxi, China
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26
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Wang Z, Fu Y, Kang Z, Liu X, Chen N, Wang Q, Tu Y, Wang L, Song S, Ling D, Song H, Kong X, Fan C. Organelle-Specific Triggered Release of Immunostimulatory Oligonucleotides from Intrinsically Coordinated DNA-Metal-Organic Frameworks with Soluble Exoskeleton. J Am Chem Soc 2017; 139:15784-15791. [PMID: 29024595 DOI: 10.1021/jacs.7b07895] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
DNA has proven of high utility to modulate the surface functionality of metal-organic frameworks (MOFs) for various biomedical applications. Nevertheless, current methods for preparing DNA-MOF nanoparticles rely on either inefficient covalent conjugation or specific modification of oligonucleotides. In this work, we report that unmodified oligonucleotides can be loaded on MOFs with high density (∼2500 strands/particle) via intrinsic, multivalent coordination between DNA backbone phosphate and unsaturated zirconium sites on MOFs. More significantly, surface-bound DNA can be efficiently released in either bulk solution or specific organelles in live cells when free phosphate ions are present. As a proof-of-concept for using this novel type of DNA-MOFs in immunotherapy, we prepared a construct of immunostimulatory DNA-MOFs (isMOFs) by intrinsically coordinating cytosine-phosphate-guanosine (CpG) oligonucleotides on biocompatible zirconium MOF nanoparticles, which was further armed by a protection shell of calcium phosphate (CaP) exoskeleton. We demonstrated that isMOFs exhibited high cellular uptake, organelle specificity, and spatiotemporal control of Toll-like receptors (TLR)-triggered immune responses. When isMOF reached endolysosomes via microtubule-mediated trafficking, the CaP exoskeleton dissolved in the acidic environment and in situ generated free phosphate ions. As a result, CpG was released from isMOFs and stimulated potent immunostimulation in living macrophage cells. Compared with naked CpG-MOF, isMOFs exhibited 83-fold up-regulation in stimulated secretion of cytokines. We thus expect this isMOF design with soluble CaP exoskeleton and an embedded sequential "protect-release" program provides a highly generic approach for intracellular delivery of therapeutic nucleic acids.
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Affiliation(s)
- Zejun Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Shanghai 201800, People's Republic of China
| | - Yao Fu
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University , Hangzhou 310027, People's Republic of China
| | - Zhengzhong Kang
- Department of Chemistry, Zhejiang University , Hangzhou 310027, People's Republic of China.,Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology , SE-10691 Stockholm, Sweden
| | - Xiaoguo Liu
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Shanghai 201800, People's Republic of China
| | - Nan Chen
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Shanghai 201800, People's Republic of China
| | - Qi Wang
- Department of Chemistry, Zhejiang University , Hangzhou 310027, People's Republic of China
| | - Yaoquan Tu
- Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology , SE-10691 Stockholm, Sweden
| | - Lihua Wang
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Shanghai 201800, People's Republic of China
| | - Shiping Song
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Shanghai 201800, People's Republic of China
| | - Daishun Ling
- Institute of Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University , 866 Yuhangtang Road, Hangzhou 310058, People's Republic of China
| | - Haiyun Song
- Key Laboratory of Food Safety Research, Institute for Nutritional Sciences, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences , Shanghai 200031, People's Republic of China
| | - Xueqian Kong
- Center for Chemistry of High-Performance & Novel Materials, Department of Chemistry, Zhejiang University , Hangzhou 310027, People's Republic of China
| | - Chunhai Fan
- Division of Physical Biology and Bioimaging Center, Shanghai Synchrotron Radiation Facility, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences , Shanghai 201800, People's Republic of China
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27
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Affiliation(s)
- Z Kang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - X D Min
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Z Y Feng
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - L Wang
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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28
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Abstract
Owing to unique morphology, ultrasmall lateral sizes, and exceptional properties, graphene quantum dots (GQDs) hold great potential in many applications, especially in the field of electrochemical biosensors, bioimaging, drug delivery, et cetera. Its biosafety and potential cytotoxicity to human and animal cells has been a growing concern in recent years. In this work, the potential cytotoxicity of GQDs was evaluated by molecular dynamics simulations. Our simulation demonstrates that small size GQDs could easily permeate into the lipid membrane in a vertical way. It is relatively difficult to permeate into the lipid membrane for GQDs that are larger than GQD61 on the nanosecond time-scale. The thickness of the POPC membrane could even be affected by the small size of GQDs. Free energy calculations revealed that the free energy barrier of GQD permeation through the lipid membrane could greatly change with the change of GQD size. Under high GQD concentration, the GQD molecules could rapidly aggregate in water but disaggregate after entering into the membrane interior. Moreover, high concentrations of GQDs could induce changes in the structure properties and diffusion properties of the lipid bilayer, and it may affect the cell signal transduction. However, GQDs with relatively small size are not large enough to mechanically damage the lipid membrane. Our results suggest that the cytotoxicity of GQDs with small size is low and may be appropriate for biomedical application.
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Affiliation(s)
- Lijun Liang
- College of Life Information Science and Instrument Engineering, Hangzhou Dianzi University, No. 1, Second Street, Jianggan District, Hangzhou, 310018, People's Republic of China
| | - Zhe Kong
- College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou, No. 1, Second Street, Jianggan District, Hangzhou, 310018, People's Republic of China
| | - Zhengzhong Kang
- Department of Chemistry, Zhejiang University, Zheda Road 38, Hangzhou, 310028, People's Republic of China.,Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - Hongbo Wang
- College of Automation, Hangzhou Dianzi University, No. 1, Second Street, Jianggan District, Hangzhou 310018, People's Republic of China
| | - Li Zhang
- Department of Chemistry, Zhejiang Sci-Tech University, No. 2, Second Street, Jianggan District, Hangzhou, 310012, People's Republic of China
| | - Jia-Wei Shen
- School of Medicine, Hangzhou Normal University, Xuelin Street 16, Jianggan District, Hangzhou 310016, People's Republic of China
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29
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Yew KL, Kang Z, Anum A. Late presentation of ALCAPA syndrome in an elderly Asian lady. Med J Malaysia 2016; 71:217-219. [PMID: 27770127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Coronary artery anomalies are often discovered incidentally during cardiac catheterization or computed tomography coronary angiography and may involve the affected coronary artery origin and its course. Coronary artery anomalies are associated with congenital heart disease. The affected coronary arteries may have an unusual high take off origin, origin from contralateral or non-coronary sinus, origin from the pulmonary artery, single coronary system or coronary artery fistula.
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Affiliation(s)
- K L Yew
- Sarawak Heart Center, Cardiology Department, Kota Samarahan, 94300 Sarawak, Malaysia.
| | - Z Kang
- Sarawak Heart Center, Cardiology Department, Kota Samarahan, 94300 Sarawak, Malaysia
| | - A Anum
- Sarawak Heart Center, Cardiology Department, Kota Samarahan, 94300 Sarawak, Malaysia
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30
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Grelewicz Z, Lee B, Cutright D, Kang Z, Gopalakrishnan M, Sathiaseelan V, Zhang H. SU-F-T-75: Dosimetry Considerations in the Use of Hanging-Eye Block for Lesions of the Conjunctiva. Med Phys 2016. [DOI: 10.1118/1.4956211] [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: 11/07/2022] Open
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31
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Lee B, Grelewicz Z, Kang Z, Cutright D, Gopalakrishnan M, Sathiaseelan V, Zhang H. SU-F-T-08: Brachytherapy Film Dosimetry in a Water Phantom for a Ring and Tandem HDR Applicator. Med Phys 2016. [DOI: 10.1118/1.4956142] [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: 11/07/2022] Open
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32
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Ruan W, Kang Z, Li Y, Sun T, Wang L, Liang L, Lai M, Wu T. Interaction between IGFBP7 and insulin: a theoretical and experimental study. Sci Rep 2016; 6:19586. [PMID: 27101796 PMCID: PMC4840315 DOI: 10.1038/srep19586] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 10/14/2015] [Indexed: 12/13/2022] Open
Abstract
Insulin-like growth factor binding protein 7 (IGFBP7) can bind to insulin with high affinity which inhibits the early steps of insulin action. Lack of recognition mechanism impairs our understanding of insulin regulation before it binds to insulin receptor. Here we combine computational simulations with experimental methods to investigate the interaction between IGFBP7 and insulin. Molecular dynamics simulations indicated that His200 and Arg198 in IGFBP7 were key residues. Verified by experimental data, the interaction remained strong in single mutation systems R198E and H200F but became weak in double mutation system R198E-H200F relative to that in wild-type IGFBP7. The results and methods in present study could be adopted in future research of discovery of drugs by disrupting protein-protein interactions in insulin signaling. Nevertheless, the accuracy, reproducibility, and costs of free-energy calculation are still problems that need to be addressed before computational methods can become standard binding prediction tools in discovery pipelines.
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Affiliation(s)
- Wenjing Ruan
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou 310058, P. R. China.,Department of Respiratory Medicine, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, P.R. China
| | - Zhengzhong Kang
- Soft Matter Research Center and Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Youzhao Li
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou 310058, P. R. China
| | - Tianyang Sun
- Soft Matter Research Center and Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Lipei Wang
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou 310058, P. R. China
| | - Lijun Liang
- Soft Matter Research Center and Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
| | - Maode Lai
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou 310058, P. R. China
| | - Tao Wu
- Soft Matter Research Center and Department of Chemistry, Zhejiang University, Hangzhou 310027, P. R. China
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33
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Zhang X, Feng H, Feng C, Xu H, Huang X, Wang Q, Duan X, Wang X, Wei G, Huang L, Kang Z. Isolation and characterisation of cDNA encoding a wheat heavy metal-associated isoprenylated protein involved in stress responses. Plant Biol (Stuttg) 2015; 17:1176-86. [PMID: 25951496 DOI: 10.1111/plb.12344] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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: 02/23/2015] [Accepted: 05/01/2015] [Indexed: 05/03/2023]
Abstract
In cells, metallochaperones are important proteins that safely transport metal ions. Heavy metal-associated isoprenylated plant proteins (HIPPs) are metallochaperones that contain a metal binding domain and a CaaX isoprenylation motif at the carboxy-terminal end. To investigate the roles of wheat heavy metal-associated isoprenylated plant protein (TaHIPP) genes in plant development and in stress responses, we isolated cDNA encoding the wheat TaHIPP1 gene, which contains a heavy metal-associated domain, nuclear localisation signals and an isoprenylation motif (CaaX motif). Quantitative real-time PCR analysis indicated that the TaHIPP1 gene was differentially expressed under biotic and abiotic stresses. Specifically, TaHIPP1 expression was up-regulated by ABA exposure or wounding. Additionally, TaHIPP1 over-expression in yeast (Schizosaccharomyces pombe) significantly increased the cell growth rate under Cu(2+) and high salinity stresses. The nuclear localisation of the protein was confirmed with confocal laser scanning microscopy of epidermal onion cells after particle bombardment with chimeric TaHIPP1-GFP constructs. In addition, TaHIPP1 was shown to enhance the susceptibility of wheat to Pst as determined by virus-induced gene silencing. These data indicate that TaHIPP1 is an important component in defence signalling pathways and may play a crucial role in the defence response of wheat to biotic and certain abiotic stresses.
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Affiliation(s)
- X Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Science, Northwest A&F University, Yangling, Shaanxi, China
| | - H Feng
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - C Feng
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Science, Northwest A&F University, Yangling, Shaanxi, China
| | - H Xu
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Science, Northwest A&F University, Yangling, Shaanxi, China
| | - X Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - Q Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Science, Northwest A&F University, Yangling, Shaanxi, China
| | - X Duan
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Life Science, Northwest A&F University, Yangling, Shaanxi, China
| | - X Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - G Wei
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - L Huang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
| | - Z Kang
- State Key Laboratory of Crop Stress Biology for Arid Areas and College of Plant Protection, Northwest A&F University, Yangling, Shaanxi, China
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34
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Shi C, Kong Z, Sun T, Liang L, Shen J, Zhao Z, Wang Q, Kang Z, Ågren H, Tu Y. Molecular dynamics simulations indicate that DNA bases using graphene nanopores can be identified by their translocation times. RSC Adv 2015. [DOI: 10.1039/c4ra12530d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A, T, C, and G could be identified by translocation time using a 2 nm graphene nanopore under a low electric field .
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Affiliation(s)
- Changchun Shi
- The Children's Hospital
- Zhejiang University School of Medicine
- Hangzhou
- People's Republic of China
| | - Zhe Kong
- College of Automation
- Hangzhou Dianzi University
- Hangzhou 310018
- People's Republic of China
| | - Tianyang Sun
- Department of Chemistry and Soft Matter Research Center
- Zhejiang University
- Hangzhou 310027
- People's Republic of China
| | - Lijun Liang
- Department of Chemistry and Soft Matter Research Center
- Zhejiang University
- Hangzhou 310027
- People's Republic of China
- Division of Theoretical Chemistry and Biology
| | - Jiawei Shen
- School of Medicine
- Hangzhou Normal University
- Hangzhou 310016
- People's Republic of China
| | - Zhengyan Zhao
- The Children's Hospital
- Zhejiang University School of Medicine
- Hangzhou
- People's Republic of China
| | - Qi Wang
- Department of Chemistry and Soft Matter Research Center
- Zhejiang University
- Hangzhou 310027
- People's Republic of China
| | - Zhengzhong Kang
- Department of Chemistry and Soft Matter Research Center
- Zhejiang University
- Hangzhou 310027
- People's Republic of China
- Division of Theoretical Chemistry and Biology
| | - Hans Ågren
- Division of Theoretical Chemistry and Biology
- School of Biotechnology
- KTH Royal Institute of Technology
- SE-10691 Stockholm
- Sweden
| | - Yaoquan Tu
- Division of Theoretical Chemistry and Biology
- School of Biotechnology
- KTH Royal Institute of Technology
- SE-10691 Stockholm
- Sweden
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Hu M, Sheng J, Kang Z, Zou L, Guo J, Sun P. Magnetic resonance imaging and dual energy X-ray absorptiometry of the lumbar spine in professional wrestlers and untrained men. J Sports Med Phys Fitness 2014; 54:505-510. [PMID: 25034552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aim of this study was to examine the relation between bone marrow adipose tissue (BMAT) and bone mineral density (BMD) of lumbar spine in male professional wrestlers and healthy untrained men. A total of 14 wrestlers (22.9±3.4 years) and 11 controls (24.4±1.6 years) were studied cross-sectionally. Body composition and BMD were measured by dual-energy X-ray absorptiometry. Magnetic resonance imaging of the lumbar spine was examined in a sagittal T1-weighted (T1-w) spin-echo (SE) sequence. The averaged bone marrow signal intensity (SI) of L2-L4 was related to the signal of an adjacent nondegenerative disk. Mean SI of T1-w SE in wrestlers was lower than controls (P=0.001), indicating L2-L4 BMAT in wrestlers was lower compared to controls. L2-L4 BMD in wrestlers was higher than controls (P<0.001). In the total subject population, L2-L4 BMD was inversely correlated with mean SI of T1-w SE (r=-0.62, P=0.001). This association remained strong after adjusting for body mass and whole lean mass, but became weaker after adjusting for whole body or trunk fat percentage. The inverse relationship between BMAT and BMD was confirmed in this relatively small subject sample with narrow age range, which implies that exercise training is an important determinant of this association.
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Affiliation(s)
- M Hu
- Department of Sport and Health Sciences, Guangzhou Institute of Physical EducationGuangzhou, China -
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Kang Z, Zhu H, Luan H, Han F, Jiang W. Curculigoside A induces angiogenesis through VCAM-1/Egr-3/CREB/VEGF signaling pathway. Neuroscience 2014; 267:232-40. [DOI: 10.1016/j.neuroscience.2014.02.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 02/25/2014] [Accepted: 02/27/2014] [Indexed: 12/25/2022]
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Miao Y, Kang Z, Xu F, Qi S, Sheng Y, Han Y, Hu R, Guo X, Yang Q. Association analysis of the IL2RA gene with alopecia areata in a Chinese population. Dermatology 2013; 227:299-304. [PMID: 24280705 DOI: 10.1159/000351555] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2012] [Accepted: 04/12/2013] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Interleukin-2 receptor subunit alpha (IL2RA) is highly expressed on CD4+CD25+ regulatory T cells and is important for immune homeostasis and the suppression of autoimmune responses. It has been suggested that the single nucleotide polymorphism in IL2RA may affect the pathogenesis of alopecia areata (AA). OBJECTIVE Our aim was to investigate the link between IL2RA polymorphism and AA in a Chinese population. METHODS We examined 427 patients and 430 controls in this study. The rs3118470 polymorphism was evaluated using high-resolution melting analysis and direct sequencing. RESULTS The prevalence of the C/C, T/C and T/T genotypes was 16.2, 48.2 and 35.6%, respectively. The genotype distribution and allele frequencies were significantly different between AA and control subjects (p < 0.0001). The C allele frequency was significantly higher in the AA group (p < 0.0001), and the frequencies of C allele and C/C genotype were higher in the patients with family history (p = 0.034; p < 0.0001). CONCLUSIONS The rs3118470 single nucleotide polymorphism of IL2RA may be a genetic marker to assess the risk of AA in a Chinese population.
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Affiliation(s)
- Y Miao
- Department of Dermatology, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, China
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Bacchus I, Gopalakrishnan M, Kang Z. SU-E-T-594: Software Application for Comparison and Verification of Radiotherapy Treatment Plans. Med Phys 2013. [DOI: 10.1118/1.4815022] [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: 11/07/2022] Open
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Wang S, Zhu H, Lu C, Kang Z, Luo Y, Feng L, Lu X. Fermented milk supplemented with probiotics and prebiotics can effectively alter the intestinal microbiota and immunity of host animals. J Dairy Sci 2013; 95:4813-4822. [PMID: 22916885 DOI: 10.3168/jds.2012-5426] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Accepted: 05/26/2012] [Indexed: 01/03/2023]
Abstract
Fermented milk supplemented with 2 probiotic strains, Bifidobacterium lactis Bi-07 and Lactobacillus acidophilus NCFM, and a prebiotic, isomaltooligosaccharide, was orally administered to 100 healthy adults at 480 g/d for 2 wk in a randomized controlled trial. The fecal bacterial compositions of these subjects were examined by culture before and after the intervention. The same fermented milk was also orally fed to BALB/c mice, and immune as well as fecal bacteria analyses were conducted using the same culturing methods. After the intervention, increases in fecal bifidobacteria and lactobacilli were observed among the subjects compared with the subjects in the control group. In contrast, after the intervention, fecal enterobacilli were significantly decreased in the test group compared with the control group. The same effects on the composition of the intestinal microbiota were observed in mice. Furthermore, the tested mice were found to have significantly increased delayed-type hypersensitivity, plaque-forming cells, and half-hemolysis values after the intervention with the fermented milk. In summary, the synbiotic fermented milk containing probiotics and a prebiotic may contribute to improve intestinal health and may have a positive effect on the humoral and cell-mediated immunity of host animals.
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Affiliation(s)
- S Wang
- College of Food Science and Nutritional Engineering, China Agricultural University, Box 112, Beijing, 10083, P. R. China; Shijiazhuang Junlebao Dairy Co. Ltd., Shijiazhuang, Hebei, 050221, P. R. China
| | - H Zhu
- Shijiazhuang Junlebao Dairy Co. Ltd., Shijiazhuang, Hebei, 050221, P. R. China.
| | - C Lu
- Shijiazhuang Junlebao Dairy Co. Ltd., Shijiazhuang, Hebei, 050221, P. R. China
| | - Z Kang
- Shijiazhuang Junlebao Dairy Co. Ltd., Shijiazhuang, Hebei, 050221, P. R. China
| | - Y Luo
- College of Food Science and Nutritional Engineering, China Agricultural University, Box 112, Beijing, 10083, P. R. China
| | - L Feng
- Shijiazhuang Junlebao Dairy Co. Ltd., Shijiazhuang, Hebei, 050221, P. R. China
| | - X Lu
- Shijiazhuang Junlebao Dairy Co. Ltd., Shijiazhuang, Hebei, 050221, P. R. China
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Bi B, Xiao X, Zhang H, Gao J, Tao M, Niu H, Wang Y, Wang Q, Chen C, Sun N, Li K, Fu J, Gan Z, Sang W, Zhang G, Yang L, Tian T, Li Q, Yang Q, Sun L, Li Y, Rong H, Guan C, Zhao X, Ye D, Zhang Y, Ma Z, Li H, He K, Chen J, Cai Y, Zhou C, Luo Y, Wang S, Gao S, Liu J, Guo L, Guan J, Kang Z, Di D, Li Y, Shi S, Li Y, Chen Y, Flint J, Kendler K, Liu Y. A comparison of the clinical characteristics of women with recurrent major depression with and without suicidal symptomatology. Psychol Med 2012; 42:2591-2598. [PMID: 22716960 PMCID: PMC3488812 DOI: 10.1017/s003329171200058x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2011] [Revised: 03/02/2012] [Accepted: 03/06/2012] [Indexed: 11/22/2022]
Abstract
BACKGROUND The relationship between recurrent major depression (MD) in women and suicidality is complex. We investigated the extent to which patients who suffered with various forms of suicidal symptomatology can be distinguished from those subjects without such symptoms. METHOD We examined the clinical features of the worst episode in 1970 Han Chinese women with recurrent DSM-IV MD between the ages of 30 and 60 years from across China. Student's t tests, and logistic and multiple logistic regression models were used to determine the association between suicidality and other clinical features of MD. RESULTS Suicidal symptomatology is significantly associated with a more severe form of MD, as indexed by both the number of episodes and number of MD symptoms. Patients reporting suicidal thoughts, plans or attempts experienced a significantly greater number of stressful life events. The depressive symptom most strongly associated with lifetime suicide attempt was feelings of worthlessness (odds ratio 4.25, 95% confidence interval 2.9-6.3). Excessive guilt, diminished concentration and impaired decision-making were also significantly associated with a suicide attempt. CONCLUSIONS This study contributes to the existing literature on risk factors for suicidal symptomatology in depressed women. Identifying specific depressive symptoms and co-morbid psychiatric disorders may help improve the clinical assessment of suicide risk in depressed patients. These findings could be helpful in identifying those who need more intense treatment strategies in order to prevent suicide.
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Affiliation(s)
- B. Bi
- The First Hospital of China Medical University, Shenyang, People's Republic of China (PRC)
| | - X. Xiao
- The First Hospital of China Medical University, Shenyang, People's Republic of China (PRC)
| | - H. Zhang
- The First Hospital of China Medical University, Shenyang, People's Republic of China (PRC)
| | - J. Gao
- ZheJiang Traditional Chinese Medical Hospital, Hangzhou, PRC
| | - M. Tao
- Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, PRC
| | - H. Niu
- No. 1 Hospital of Zhengzhou University, Zhengzhou, PRC
| | - Y. Wang
- Shandong Mental Health Center, Shan Dong, PRC
| | - Q. Wang
- Beijing Anding Hospital, Capital Medical University, Beijing, PRC
| | - C. Chen
- No. 1 Hospital of Medical College of Xian Jiaotong University, Xian, Shaan Xi, PRC
| | - N. Sun
- No. 1 Hospital of Shanxi Medical University, Shanxi, PRC
| | - K. Li
- Mental Hospital of Jiangxi Province, Jiangxi, PRC
| | - J. Fu
- ShengJing Hospital of China Medical University, Liaoning, PRC
| | - Z. Gan
- No. 3 Affiliated Hospital of Zhongshan University, Guangdong, PRC
| | - W. Sang
- Hebei Mental Health Center, Hebei, PRC
| | - G. Zhang
- No. 4 Affiliated Hospital of Jiangsu University, Jiang Su, PRC
| | - L. Yang
- Jilin Brain Hospital, Jilin, PRC
| | - T. Tian
- Tianjin Anding Hospital, Tianjin, PRC
| | - Q. Li
- No. 1 Mental Health Center Affiliated Harbin Medical University, Heilongjiang, PRC
| | - Q. Yang
- Chongqing Mental Health Center, Chongqing, PRC
| | - L. Sun
- Psychiatric Hospital of Henan Province, Henan, PRC
| | - Ying Li
- Dalian No. 7 People's Hospital and Dalian Mental Health Center, Dalian, PRC
| | - H. Rong
- Shenzhen Kangning Hospital, Shenzhen, PRC
| | - C. Guan
- Nanjing Brain Hospital, Jiang Su, PRC
| | - X. Zhao
- The First Hospital of Hebei Medical University, Shijiazhuang, PRC
| | - D. Ye
- Sichuan Mental Health Center, Sichuan, PRC
| | - Y. Zhang
- Lanzhou University Second Hospital, Second Clinical Medical College of Lanzhou University, Gansu Province, PRC
| | - Z. Ma
- No. 1 Hospital of Chongqing Medical University, Chongqing, PRC
| | - H. Li
- Mental Health Center of West China Hospital of Sichuan University, Si Chuan, PRC
| | - K. He
- Shanghai Tongji University Affiliated Tongji Hospital, Shanghai, PRC
| | - J. Chen
- Shanghai Jiao Tong University School of Medicine Affiliated Shanghai Mental Health Center, Shanghai, PRC
| | - Y. Cai
- Fudan University Affiliated Huashan Hospital, Shanghai, PRC
| | - C. Zhou
- Wuhan Mental Health Center, Hubei, PRC
| | - Y. Luo
- No. 3 Hospital of Heilongjiang Province, Heilongjiang, PRC
| | - S. Wang
- The First Affiliated Hospital of Jinan University, Guangzhou, PRC
| | - S. Gao
- Ningbo Kangning Hospital, Zhejiang, PRC
| | - J. Liu
- Suzhou Guangji Hospital, Jiangsu, PRC
| | - L. Guo
- The Fourth Military Medical University Affiliated Xijing Hospital, Shaanxi, PRC
| | - J. Guan
- Guangzhou Brain Hospital/Guangzhou Psychiatric Hospital, Guangzhou, PRC
| | - Z. Kang
- No. 4 People's Hospital of Liaocheng, Shandong, PRC
| | - D. Di
- Mental Health Institute of Jining Medical College, Shandong, PRC
| | - Yajuan Li
- Xian Mental Health Center, Xian, Shanxi, PRC
| | - S. Shi
- Fudan University Affiliated Huashan Hospital, Shanghai, PRC
| | - Yihan Li
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - Y. Chen
- Clinical Trial Service Unit, Richard Doll Building, Oxford, UK
| | - J. Flint
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - K. Kendler
- Virginia Commonwealth University (VCU), Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Richmond, VA, USA
| | - Y. Liu
- The First Hospital of China Medical University, Shenyang, People's Republic of China (PRC)
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Yang G, Kang Z, Ye X, Wu T, Zhu Q. Molecular simulation of flavin adenine dinucleotide immobilized on charged single-walled carbon nanotubes for biosensor applications. Biomaterials 2012; 33:8757-70. [PMID: 22975425 DOI: 10.1016/j.biomaterials.2012.08.053] [Citation(s) in RCA: 11] [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] [Received: 08/02/2012] [Accepted: 08/23/2012] [Indexed: 11/26/2022]
Abstract
The reconstitution of apo-glucose oxidase (apo-GOx) on single-walled carbon nanotubes (SWNTs) functionalized with the cofactor, flavin adenine dinucleotide (FAD), greatly improved electron transfer turnover rate of the redox reactions in glucose sensing with glucose sensors. The research reported here is aimed to better understand molecular details of affection of the charging SWNT to the conformational changes of FAD, in order to find a rational design and selection scheme of SWNT which is suitable for the FAD and apo-GOx to perform their reconstitution. In this report, molecular simulations of FAD functionalized differently charged SWNTs were carried outin an aqueous environment, with counterions to maintain total charge neutrality. The conformation and orientation changes were observed by both trajectory and quantitative analyses. The simulation results showed that in both uncharged and positively charged SWNT situations, FAD adsorbed onto SWNT at the end of the simulations, which increased the steric resistance of molecules and hindered the reconstitution of apo-GOx and FAD to some degree. By contrast, FAD functionalized negatively charged SWNT maintained its original conformation largely. In addition, negatively charged SWNT may be the best choice for electron transfer mediator for the reconstitution of apo-GOx on relay-cofactor units associated with electrodes.
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Affiliation(s)
- Guang Yang
- College of Biomedical Engineering & Instrument Science, Zhejiang University, PR China
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Chen Y, Ouyang DS, Kang Z, Yang GP, Tan ZR, Zhou G, Yan J. Effect of a traditional Chinese medicine Liu Wei Di Huang Wan on the activities of CYP2C19, CYP2D6 and CYP3A4 in healthy volunteers. Xenobiotica 2011; 42:596-602. [PMID: 22208477 DOI: 10.3109/00498254.2011.644596] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Liu Wei Di Huang Wan (LDW), a well-known traditional Chinese medicine, is widely used for the treatment of various diseases in China. This study was designed to investigate the potential herb-drug interactions of LDW in healthy volunteers and attempted to ascertain whether the interaction might be affected by genotypes. We assessed the effect of LDW on the activities of CYP2C19, CYP2D6 and CYP3A4 in 12 Chinese healthy subjects in a single-center, controlled, non-blinded, two-way crossover clinical trial. The subject pool consisted of six extensive metabolizers with CYP2C19*1/*1 and six poor metabolizers with CYP2C19*2/*2. Placebo or 4.8 g LDW (12 pills, 0.2 g/pill, twice daily) was given to each participant for 14 continuous days with a wash-out period of 2 weeks after an oral administration of 30 mg omeprazole, 30 mg dextromethorphan hydrobromide and 7.5 mg midazolam. The activities of CYP2C19, CYP2D6 and CYP3A4 were ascertained by their respective plasma or urinary metabolic ratios on day 14 post-treatment. There is no difference in the activities of the three tested enzymes before or after a 14-day administration of LDW. LDW had no effect on the pharmacokinetic parameters of the substrates and their metabolites. A 14-day administration of LDW did not affect the activities of CYP2C19, CYP2D6 and CYP3A4. LDW is unlikely to cause pharmacokinetic interaction when it is combined with other medications predominantly metabolized by these enzymes.
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Affiliation(s)
- Y Chen
- Institute of Clinical Pharmacology, Central South University, Changsha, Hunan, China
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Shiloh R, Rakhra S, Evans J, Helenowski I, Kang Z, Mulcahy M, Small W, Hayes J. Retrospective Review of the Dosimetric and Treatment-Related Determinants of Toxicity in Patients with Esophageal Cancer Treated with Concurrent Chemoradiation with or without Surgery. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.524] [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: 12/01/2022]
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Han LY, Wu QH, Jiao ML, Hao YH, Liang LB, Gao LJ, Legge DG, Quan H, Zhao MM, Ning N, Kang Z, Sun H. Associations between single-nucleotide polymorphisms (+45T>G, +276G>T, -11377C>G, -11391G>A) of adiponectin gene and type 2 diabetes mellitus: a systematic review and meta-analysis. Diabetologia 2011; 54:2303-14. [PMID: 21638131 DOI: 10.1007/s00125-011-2202-9] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Accepted: 04/27/2011] [Indexed: 02/07/2023]
Abstract
AIMS/HYPOTHESIS The associations between adiponectin polymorphisms and type 2 diabetes have been studied widely; however, results are inconsistent. METHODS We searched electronic literature databases and reference lists of relevant articles. A fixed or random effects model was used on the basis of heterogeneity. Sub-group and meta-regression analyses were conducted to explore the sources of heterogeneity. RESULTS There were no statistically significant associations between +45T>G (rs2241766), +276G>T (rs1501299), -11391G>A (rs17300539) and type 2 diabetes risk. However, for -11377C>G (rs266729), the pooled OR (95% CI) for G vs C allele was 1.07 (1.03-1.11, p = 0.001). Subgroup analysis by study design revealed that -11377C>G (rs266729) dominant model (CG+GG vs CC, p = 0.0008) and G vs C allele (p = 0.0004) might be associated with type 2 diabetes risk in population-based case-control studies. After stratification by ethnicity, we found that -11377C>G (rs266729) dominant model (CG+GG vs CC, p = 0.004) and G vs C allele (p = 0.001) might be associated with type 2 diabetes risk in white individuals. In individuals with a family history of diabetes, the presence of -11391G>A (rs17300539) dominant model (GA+AA vs GG) and A vs G allele might be associated with increased risk of type 2 diabetes. CONCLUSIONS/INTERPRETATION The presence of +45T>G (rs2241766), +276G>T (rs1501299) and -11391G>A (rs17300539) do not appear to influence the development of type 2 diabetes. However, G vs C allele of -11377C>G (rs266729) might be a risk factor for type 2 diabetes.
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Affiliation(s)
- L Y Han
- Department of Social Medicine, School of Public Health, Harbin Medical University, 157 Baojian Road, Harbin, Heilongjiang 150081, People's Republic of China
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Wang J, Xiao Y, Lu Y, Kang Z, Zhang M, Liu Y, Liang J, Zhang M, Li T. Pharmacokinetics of antofloxacin hydrochloride in healthy male subjects after multiple intravenous dose administration. Xenobiotica 2011; 41:561-6. [PMID: 21446836 DOI: 10.3109/00498254.2011.565820] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The purpose of the study was to evaluate pharmacokinetic characteristics of antofloxacin hydrochloride, a new fluoroquinolone antibiotic, during a multiple, intravenous dosing regimen. Twelve healthy, Chinese male volunteer subjects were each given 300 mg of antofloxacin by intravenous infusion once daily for 7 days. Blood and urine samples were taken at designated time points for analysis of antofloxacin concentration by high-performance liquid chromatography (HPLC). Safety and tolerability were assessed by evaluation of subject complaints, vital signs, electrocardiograms, electroencephalograms, clinical chemistry parameters, haematology and urinalysis and prothrombin time. The serum steady concentration of antofloxacin was obtained in 96 h after the administration of a daily intravenous dose of 300 mg of the drug. In the present study, the following pharmacokinetic parameters after 7 days of treatment with antofloxacin were determined to be: C(max) 3.81 ± 0.66 mg/L, C(min) 0.85 ± 0.19 mg/L, AUC(0-24) 60.51 ± 8.30 mg/L·h, C(av) 2.52 ± 0.35 mg/L, PTF 87.45 ± 3.37%, t(1/2)β 20.34 ± 1.88 h. The C(max) and AUC(0-24) after 7-day treatment were both higher than after the first dose (by 43% and 110%, respectively). The cumulative urinary elimination of antofloxacin within 96 h after the last dose was about 56%. During the study, there were neither subject complaints nor significant adverse clinical findings. Antofloxacin, administered intravenously as a single, daily 300 mg dose for 7 days, demonstrated favourable pharmacokinetic characteristics and tolerability. The results of this study indicate that antofloxacin hydrochloride is suitable for further clinical study.
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Affiliation(s)
- J Wang
- Institute of Clinical Pharmacology, First Hospital, Peking University, Haidian District, Beijing, China
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Mayeenuddin LH, Yu Y, Kang Z, Helman LJ, Cao L. Insulin-like growth factor 1 receptor antibody induces rhabdomyosarcoma cell death via a process involving AKT and Bcl-x(L). Oncogene 2010; 29:6367-77. [PMID: 20818434 DOI: 10.1038/onc.2010.364] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Insulin-like growth factors (IGFs) and their receptor, IGF-1 receptor (IGF1R), have important roles in growth, development, stress response, aging and cancer. There are many agents that inhibit IGF1R in oncology clinical development, and in some cases, they have been associated with rapid tumor regression. However, it is not clear by which process these targeted agents induce cancer cell death and how to predict such tumor responses. Here, we showed that IGF1R antibody led to rapid cell death and tumor regression in some rhabdomyosarcoma (RMS) cells. Mechanistic analysis revealed a rapid onset of mitochondrial-dependent apoptosis, including mitochondrial depolarization, cytochrome C release and the activation of specific caspases. The antibody sensitive cells had greater dependence on AKT for maintaining downstream signaling and the expression of a constitutively active AKT, which restored AKT-signaling in these cells, inhibited anti-IGF1R induced cell death. Further analysis showed IGF1R antibody-induced hypophosphorylation of BAD and activation of downstream BAX. Interestingly, the examination of RMS cell lines and tumors revealed an inverse correlation between elevated IGF1R and Bcl-2 level (P=0.033), with the sensitive cells lacking Bcl-2 expression. The overexpression of BAD specific target, Bcl-x(L), conferred resistance, whereas Bcl-x(L) knockdown sensitized cells lacking Bcl-2 to anti-IGF1R-induced cell death. We propose that RMS pathogenesis involves increased IGF1R expression that enhances AKT and Bcl-x(L)-mediated cell survival, and the blockage of IGF1R results in inhibition of survival signal from Bcl-x(L) and cell death in the sensitive Bcl-2 negative cells.
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Affiliation(s)
- L H Mayeenuddin
- Genetics Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD 20892-4265, USA
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Wang J, Xiao Y, Lu Y, Kang Z, Zhang M, Liu Y, Liang J, Zhang M, Li T. Pharmacokinetics of antofloxacin hydrochloride, a novel fluoroquinolone, after single-dose intravenous administration in healthy Chinese male volunteers. Xenobiotica 2010; 40:344-9. [DOI: 10.3109/00498251003649798] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Diavolitsis V, Rademaker A, Boyle J, Kang Z, Kiel K, Mulcahy M, Small W. Change in Creatinine Clearance Over Time Following Upper Abdominal Irradiation: A Dose Volume Histogram Multivariate Analysis. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.427] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kang Z, Bédécarrats GY, Zadworny D. Expression patterns of the prolactin receptor gene in chicken lymphoid tissues during embryogenesis and posthatch period. Poult Sci 2007; 86:2404-12. [PMID: 17954592 DOI: 10.3382/ps.2007-00235] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Prolactin (PRL) is a pituitary hormone with multiple homeostatic roles among vertebrates. Although it has mainly been studied in relation to its role during the initiation and maintenance of incubation behavior in avian species, it has also been shown to act on the immune system. In this study, levels of PRL receptor (PRLR) mRNA were quantified by real-time PCR, and tissue expression was localized by in situ hybridization in primary and secondary lymphoid organs. Prolactin receptor was shown to be expressed in the bursa follicles, thymus lobules, and splenic pulp at all stages of development examined. Levels of PRLR expression were consistently higher in the bursa of Fabricius when compared with other lymphoid organs, suggesting that PRL acts primarily on bursal development. Furthermore, levels of PRLR mRNA appeared to fluctuate during embryogenesis, with a significant increase observed at embryonic day 19 in the bursa, at 7 d of age in the thymus, and on hatching day in the spleen. Thus, PRL might play an important role during the development of the immune system in chickens.
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Affiliation(s)
- Z Kang
- Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada, N1G 2W1
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Kang Z, Li H, Li G, Yin D. Reaction of pyridoxamine with malondialdehyde: Mechanism of inhibition of formation of advanced lipoxidation end-products. Amino Acids 2005; 30:55-61. [PMID: 15990947 DOI: 10.1007/s00726-005-0209-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [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: 01/15/2005] [Accepted: 03/21/2005] [Indexed: 12/31/2022]
Abstract
Advanced glycation end products (AGEs) and advanced lipoxidation end products (ALEs) are implicated in many age-related chronic diseases and in protein aging. Recent studies suggest that pyridoxamine (PM) is an efficient AGEs/ALEs inhibitor in various biological systems. Because malondialdehyde (MDA) is an important intermediate in the formation of ALEs during lipid peroxidation, the purpose of this study is to determine whether PM can trap MDA directly and thereby prevent ALEs formation. PM reacted readily with MDA under physiological conditions. Within 6 h, a 1-pyridoxamino-propenal adduct derived from reaction of equimolar PM + MDA was detected. A 1-amino-3-iminopropene complex and a dihydropyridine-pyridinium complex were also identified after 7 d incubation. PM also greatly inhibited the lipofuscin-like fluorescence formation induced by MDA reaction with bovine serum albumin (BSA). Our results showed clearly that PM inhibited the formation of ALEs by trapping MDA directly under physiological condition, and provide insight into the mechanism of action of PM in protecting proteins against carbonyl stress.
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Affiliation(s)
- Z Kang
- Aging Biochemistry Lab, College of Life Sciences, Hunan Normal University, Changsha, Hunan, Peoples' Republic of China
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