151
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Prasad B, Lakshma Nayak V, Srikanth PS, Baig MF, Subba Reddy NV, Babu KS, Kamal A. Synthesis and biological evaluation of 1-benzyl-N-(2-(phenylamino)pyridin-3-yl)-1H-1,2,3-triazole-4-carboxamides as antimitotic agents. Bioorg Chem 2018; 83:535-548. [PMID: 30472555 DOI: 10.1016/j.bioorg.2018.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/31/2018] [Accepted: 11/01/2018] [Indexed: 01/11/2023]
Abstract
A library of 1-benzyl-N-(2-(phenylamino)pyridin-3-yl)-1H-1,2,3-triazole-4-carboxamides (7a-al) have been designed, synthesized and screened for their anti-proliferative activity against some selected human cancer cell lines namely DU-145, A-549, MCF-7 and HeLa. Most of them have shown promising cytotoxicity against lung cancer cell line (A549), amongst them 7f was found to be the most potent anti-proliferative congener. Furthermore, 7f exhibited comparable tubulin polymerization inhibition (IC50 value 2.04 µM) to the standard E7010 (IC50 value 2.15 µM). Moreover, flow cytometric analysis revealed that this compound induced apoptosis via cell cycle arrest at G2/M phase in A549 cells. Induction of apoptosis was further observed by examining the mitochondrial membrane potential and was also confirmed by Hoechst staining as well as Annexin V-FITC assays. Furthermore, molecular docking studies indicated that compound 7f binds to the colchicine binding site of the β-tubulin. Thus, 7f exhibits anti-proliferative properties by inhibiting the tubulin polymerization through the binding at the colchicine active site and by induction of apoptosis.
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Affiliation(s)
- Budaganaboyina Prasad
- Medicinal Chemistry and Biotechnology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India; Department of Chemistry, Osmania University, Hyderabad 500007, Telangana, India
| | - V Lakshma Nayak
- Medicinal Chemistry and Biotechnology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - P S Srikanth
- Medicinal Chemistry and Biotechnology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Mirza Feroz Baig
- Medicinal Chemistry and Biotechnology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - N V Subba Reddy
- Medicinal Chemistry and Biotechnology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Korrapati Suresh Babu
- Medicinal Chemistry and Biotechnology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India; Department of Chemistry, Osmania University, Hyderabad 500007, Telangana, India
| | - Ahmed Kamal
- Medicinal Chemistry and Biotechnology, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India; School of Pharmaceutical Education and Research (SPER), Jamia Hamdard, 110 062 New Delhi, India.
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152
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Protective effect of calpeptin on acrylamide-induced microtubule injury in sciatic nerve. Toxicology 2018; 409:103-111. [DOI: 10.1016/j.tox.2018.08.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Revised: 07/12/2018] [Accepted: 08/04/2018] [Indexed: 12/16/2022]
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153
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Vicente-Blázquez A, González M, Álvarez R, Del Mazo S, Medarde M, Peláez R. Antitubulin sulfonamides: The successful combination of an established drug class and a multifaceted target. Med Res Rev 2018; 39:775-830. [PMID: 30362234 DOI: 10.1002/med.21541] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 09/02/2018] [Accepted: 09/06/2018] [Indexed: 12/13/2022]
Abstract
Tubulin, the microtubules and their dynamic behavior are amongst the most successful antitumor, antifungal, antiparasitic, and herbicidal drug targets. Sulfonamides are exemplary drugs with applications in the clinic, in veterinary and in the agrochemical industry. This review summarizes the actual state and recent progress of both fields looking from the double point of view of the target and its drugs, with special focus onto the structural aspects. The article starts with a brief description of tubulin structure and its dynamic assembly and disassembly into microtubules and other polymers. Posttranslational modifications and the many cellular means of regulating and modulating tubulin's biology are briefly presented in the tubulin code. Next, the structurally characterized drug binding sites, their occupying drugs and the effects they induce are described, emphasizing on the structural requirements for high potency, selectivity, and low toxicity. The second part starts with a summary of the favorable and highly tunable combination of physical-chemical and biological properties that render sulfonamides a prototypical example of privileged scaffolds with representatives in many therapeutic areas. A complete description of tubulin-binding sulfonamides is provided, covering the different species and drug sites. Some of the antimitotic sulfonamides have met with very successful applications and others less so, thus illustrating the advances, limitations, and future perspectives of the field. All of them combine in a mechanism of action and a clinical outcome that conform efficient drugs.
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Affiliation(s)
- Alba Vicente-Blázquez
- Laboratorio de Química Orgánica y Farmacéutica, Departamento de Ciencias Farmacéuticas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Centro de Investigación de Enfermedades Tropicales de la Universidad de Salamanca (CIETUS), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Laboratory of Cell Death and Cancer Therapy, Department of Molecular Biomedicine, Centro de Investigaciones Biológicas, Consejo Superior de Investigaciones Científicas (CSIC), Madrid, Spain
| | - Myriam González
- Laboratorio de Química Orgánica y Farmacéutica, Departamento de Ciencias Farmacéuticas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Centro de Investigación de Enfermedades Tropicales de la Universidad de Salamanca (CIETUS), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
| | - Raquel Álvarez
- Laboratorio de Química Orgánica y Farmacéutica, Departamento de Ciencias Farmacéuticas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Centro de Investigación de Enfermedades Tropicales de la Universidad de Salamanca (CIETUS), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
| | - Sara Del Mazo
- Laboratorio de Química Orgánica y Farmacéutica, Departamento de Ciencias Farmacéuticas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Centro de Investigación de Enfermedades Tropicales de la Universidad de Salamanca (CIETUS), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
| | - Manuel Medarde
- Laboratorio de Química Orgánica y Farmacéutica, Departamento de Ciencias Farmacéuticas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Centro de Investigación de Enfermedades Tropicales de la Universidad de Salamanca (CIETUS), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
| | - Rafael Peláez
- Laboratorio de Química Orgánica y Farmacéutica, Departamento de Ciencias Farmacéuticas, Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Instituto de Investigación Biomédica de Salamanca (IBSAL), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain.,Facultad de Farmacia, Centro de Investigación de Enfermedades Tropicales de la Universidad de Salamanca (CIETUS), Universidad de Salamanca, Campus Miguel de Unamuno, Salamanca, Spain
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154
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Karki P, Meliton A, Sitikov A, Tian Y, Ohmura T, Birukova AA. Microtubule destabilization caused by particulate matter contributes to lung endothelial barrier dysfunction and inflammation. Cell Signal 2018; 53:246-255. [PMID: 30339829 DOI: 10.1016/j.cellsig.2018.10.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 10/15/2018] [Accepted: 10/15/2018] [Indexed: 11/25/2022]
Abstract
Exposure to particulate matter (PM) associated with air pollution remains a major public health concern, as it has been linked to significant increase in cardiopulmonary morbidity and mortality. Lung endothelial cell (EC) dysfunction is one of the hallmarks of cardiovascular events of lung exposure to PM. However, the role of PM in acute lung injury (ALI) exacerbation and delayed recovery remains incompletely understood. This study tested a hypothesis that PM augments lung injury and EC barrier dysfunction via microtubule-dependent mechanisms. Our data demonstrate that in pulmonary EC PM caused time- and dose-dependent remodeling of actin cytoskeleton and considerable destabilization of the microtubule (MT) network. These events led to the weakening of cell junctions and formation of actin stress fibers, resulting in disruption of lung EC monolayer and increased permeability. PM also caused ROS-dependent activation of MT-specific deacetylase, HDAC6. Suppression of HDAC6 activity by pharmacological inhibitors or siRNA-based depletion of HDAC6 abolished PM-induced EC permeability increase, which was accompanied by reduced activation of stress kinase signaling, inhibition of Rho cascade, decreased IL-6 production and suppressed activation of its downstream target STAT3. Pretreatment of pulmonary EC with IL-6 inhibitor led to inhibition of STAT3 activity and decreased PM-induced hyper-permeability. Because one of the major activators of Rho-GTPase, GEFH1, is localized on the MT, we examined its involvement in PM-caused EC barrier compromise. Inhibition of GEF-H1 activation significantly attenuated PM-induced permeability increase. Moreover, combined inhibition of IL-6 and GEF-H1 signaling exhibited additive protective effect. Taken together, these results demonstrate a critical involvement of MT-associated signaling in the PM-induced exacerbation of lung EC barrier compromise and inflammatory response.
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Affiliation(s)
- Pratap Karki
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States
| | - Angelo Meliton
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL 60637, United States
| | - Albert Sitikov
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL 60637, United States
| | - Yufeng Tian
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL 60637, United States
| | - Tomomi Ohmura
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL 60637, United States
| | - Anna A Birukova
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, United States; Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago, Chicago, IL 60637, United States.
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155
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Ti SC, Alushin GM, Kapoor TM. Human β-Tubulin Isotypes Can Regulate Microtubule Protofilament Number and Stability. Dev Cell 2018; 47:175-190.e5. [PMID: 30245156 DOI: 10.1016/j.devcel.2018.08.014] [Citation(s) in RCA: 83] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/28/2018] [Accepted: 08/20/2018] [Indexed: 10/28/2022]
Abstract
Cell biological studies have shown that protofilament number, a fundamental feature of microtubules, can correlate with the expression of different tubulin isotypes. However, it is not known if tubulin isotypes directly control this basic microtubule property. Here, we report high-resolution cryo-EM reconstructions (3.5-3.65 Å) of purified human α1B/β3 and α1B/β2B microtubules and find that the β-tubulin isotype can determine protofilament number. Comparisons of atomic models of 13- and 14-protofilament microtubules reveal how tubulin subunit plasticity, manifested in "accordion-like" distributed structural changes, can accommodate distinct lattice organizations. Furthermore, compared to α1B/β3 microtubules, α1B/β2B filaments are more stable to passive disassembly and against depolymerization by MCAK or chTOG, microtubule-associated proteins with distinct mechanisms of action. Mixing tubulin isotypes in different proportions results in microtubules with protofilament numbers and stabilities intermediate to those of isotypically pure filaments. Together, our findings indicate that microtubule protofilament number and stability can be controlled through β-tubulin isotype composition.
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Affiliation(s)
- Shih-Chieh Ti
- Laboratory of Chemistry and Cell Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA
| | - Gregory M Alushin
- Laboratory of Structural Biophysics and Mechanobiology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
| | - Tarun M Kapoor
- Laboratory of Chemistry and Cell Biology, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
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156
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Wang G, Peng Z, Peng S, Qiu J, Li Y, Lan Y. (E)-N-Aryl-2-oxo-2-(3,4,5-trimethoxyphenyl)acetohydrazonoyl cyanides as tubulin polymerization inhibitors: Structure-based bioisosterism design, synthesis, biological evaluation, molecular docking and in silico ADME prediction. Bioorg Med Chem Lett 2018; 28:3350-3355. [PMID: 30197030 DOI: 10.1016/j.bmcl.2018.09.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 08/17/2018] [Accepted: 09/04/2018] [Indexed: 10/28/2022]
Abstract
A series of (E)-N-Aryl-2-oxo-2-(3,4,5-trimethoxyphenyl)acetohydrazonoyl cyanides have been synthesized and evaluated for their anticancer activity in human hepatocellular liver carcinoma HepG2 and breast adenocarcinoma MCF-7 cell lines. Among all the tested compounds, compound 3a, 3e and 3n displayed more activity than lead compound with IC50 value of 0.26-0.61 μM. Meanwhile, these compounds (3a, 3e and 3n) showed potent antiproliferative activity against a panel of cancer cells and the HCT-8/T multidrug resistant cell line with IC50 values in the range of 0.077- 7.44 μM. Flow cytometric analyses revealed that compound 3n induced cell cycle arrest in G2/M phases in a dose dependent manner. The compound 3n also displayed potent tubulin polymerization inhibition with an IC50 value of 0.9 µM, with ten folds more active than colchicine (IC50 = 9 μM). Molecular docking studies revealed that compound 3n efficiently interacted with the colchicine binding site of tubulin through hydrophobic, cation-π and hydrogen bond interaction. Furthermore, in silico pharmacokinetic prediction shown that these compounds have a good ADME-related physicochemical parameters. These results demonstrate that 3n exhibits potent cytotoxicity in cancer cells by targeting the colchicine binding site of tubulin and potentially acts as a therapeutic lead compound for the development of anticancer drugs.
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Affiliation(s)
- Guangcheng Wang
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, China; College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China.
| | - Zhiyun Peng
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Provincial Key Laboratory of Pharmaceutics, Guizhou Medical University, Guiyang 550004, China; College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Shanshan Peng
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Jie Qiu
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, PR China
| | - Yongjun Li
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Medical University, Guiyang 550004, China.
| | - Yanyu Lan
- Engineering Research Center for the Development and Application of Ethnic Medicine and TCM (Ministry of Education), Guizhou Medical University, Guiyang 550004, China
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157
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Ma M, Zhao J, Cheng H, Deng M, Ding Z, Hou Y, Li F, Dou G, Li W. In vitro and in vivo pharmacokinetic and pharmacodynamic study of MBRI-001, a deuterium-substituted plinabulin derivative as a potent anti-cancer agent. Bioorg Med Chem 2018; 26:4687-4692. [PMID: 30119994 DOI: 10.1016/j.bmc.2018.08.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 07/26/2018] [Accepted: 08/04/2018] [Indexed: 02/06/2023]
Abstract
MBRI-001 was demonstrated preliminary better pharmacokinetics and antitumor effects than that of plinabulin in vivo. In this approach, we further carried out systematic pharmacokinetic and pharmacodynamic study of MBRI-001 in vitro and in vivo. MBRI-001 was tested stable in rat plasma and more stable in liver microsomes than plinabulin in vitro. In vivo, MBRI-001 could be distributed rapidly and widely in various tissues, especially the concentration of MBRI-001 in lung was remarkably higher than other tissues. Excretion study indicated that MBRI-001 might been decomposed and excreted as metabolites. Additionally, the combination treatment of MBRI-001 and gefitinib revealed better antitumor inhibition rate than monotherapy in vivo. Therefore, we suggest that MBRI-001 could be developed as a promising anti-cancer agent in near future.
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Affiliation(s)
- Mingxu Ma
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Jianchun Zhao
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
| | - Hejuan Cheng
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Mengyan Deng
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Zhongpeng Ding
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China
| | - Yingwei Hou
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
| | - Feng Li
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China
| | - Guifang Dou
- Institute of Transfusion Medicine, Academy of Military Medical Sciences, Beijing 100850, China
| | - Wenbao Li
- School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China; Innovation Center for Marine Drug Screening and Evaluation, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China; Marine Biomedical Research Institute of Qingdao, Qingdao 266071, China.
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158
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Müller GDAES, Lüchmann KH, Razzera G, Toledo-Silva G, Bebianno MJ, Marques MRF, Bainy ACD. Proteomic response of gill microsomes of Crassostrea brasiliana exposed to diesel fuel water-accommodated fraction. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2018; 201:109-118. [PMID: 29906693 DOI: 10.1016/j.aquatox.2018.06.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 05/28/2018] [Accepted: 06/04/2018] [Indexed: 06/08/2023]
Abstract
Diesel fuel water-accommodated fraction (diesel-WAF) is a complex mixture of organic compounds that may cause harmful effects to marine invertebrates. Expression of microsomal proteins can be changed by oil exposure, causing functional alterations in endoplasmic reticulum (ER). The aim of this study was to investigate changes in protein expression signatures in microsomes of oysterl Crassostrea brasiliana (=C.gasar) gill after exposure to 10% diesel-WAF for 24 and 72 h. Protein expression signatures of gills of oysters exposed to diesel-WAF were compared to those of unexposed oysters using two-dimensional electrophoresis (2-DE) to identify differentially expressed proteins. A total of 458 protein spots with molecular weights between 30-75 kDa were detected by 2-DE in six replicates of exposed oyster proteomes compared to unexposed ones. Fourteen differentially expressed proteins (six up-regulated and eight down-regulated) were identified. They are: proteins related to xenobiotic biotransformation (cytochrome P450 6 A, NADPH-cytochrome P450 reductase); cytoskeleton (α-tubulin, β-tubulin, gelsolin); processing and degradation of proteins pathways (thioredoxin domain-containing protein E3 ubiquitin-protein ligase MIB2); involved in the biosynthesis of glycolipids and glycoproteins (beta-1,3-galactosyltransferase 1); associated with stress responses (glutamate receptor 4 and 14-3-3 protein zeta, corticotropin-releasing factor-binding protein); plasmalogen biosynthesis (fatty acyl-CoA reductase 1), and sodium-and chloride-dependent glycine transporter 2 and glyoxylate reductase/hydroxypyruvate reductase. Different patterns of protein responses were observed between 24 and 72 h-exposed groups. Expression pattern of microsomal proteins provided a first insight on the potential diesel-WAF effects at protein level in microsomal fraction of oyster gills and indicated new potential biomarkers of exposure and effect. The present work can be a basis for future ecotoxicological studies in oysters aiming to elucidate the molecular mechanisms behind diesel-WAF toxicity and for environmental monitoring programs.
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Affiliation(s)
- Gabrielle do Amaral E Silva Müller
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry - LABCAI, Biochemistry Department, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Karim Hahn Lüchmann
- Laboratory of Biochemistry and Molecular Biology - LBBM, Fishery Engineering Department, Santa Catarina State University, Laguna, 88790-000, Brazil
| | - Guilherme Razzera
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry - LABCAI, Biochemistry Department, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Guilherme Toledo-Silva
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry - LABCAI, Biochemistry Department, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Maria João Bebianno
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry - LABCAI, Biochemistry Department, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil; Centre of Marine and Environmental Research (CIMA), University of Algarve, Campus de Gambelas, 8000-139 Faro, Portugal
| | - Maria Risoleta Freire Marques
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry - LABCAI, Biochemistry Department, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil
| | - Afonso Celso Dias Bainy
- Laboratory of Biomarkers of Aquatic Contamination and Immunochemistry - LABCAI, Biochemistry Department, Federal University of Santa Catarina, Florianópolis 88040-900, Brazil.
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159
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Tang F, Pan MH, Lu Y, Wan X, Zhang Y, Sun SC. Involvement of Kif4a in Spindle Formation and Chromosome Segregation in Mouse Oocytes. Aging Dis 2018; 9:623-633. [PMID: 30090651 PMCID: PMC6065292 DOI: 10.14336/ad.2017.0901] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 09/01/2017] [Indexed: 12/31/2022] Open
Abstract
Kif4a, a member of the kinesin superfamily, has been reported to participate in a series of cellular processes such as chromosome condensation and cytokinesis during mitosis. However, the roles of KIF4a in meiosis are still unknown. In present study we found that the Kif4a protein expression decreased in maternal aged mouse oocytes. We then explored the roles of Kif4a in mouse oocyte meiosis by knockdown analysis. Kif4a was enriched at the spindle during mouse oocyte maturation. By specific knock down of the Kif4a using morpholino microinjection, we found that the disruption of Kif4a caused the failure of polar body extrusion. Further analysis indicated that Kif4a might affect the spindle morphology and chromosome alignment in the mouse oocytes, and this might be due to the regulation of tubulin acetylation. Moreover, our results showed that an increased proportion of aneuploidy in the Kif4a knock down oocytes, and this might be due to the loss of kinetochore-microtubule attachment. Taken together, these results suggested that Kif4a possibly regulated mouse oocyte meiosis through its effects on the spindle organization and accurate chromosome segregation, and the loss of Kif4a might be related with aneuploidy of aging oocytes.
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Affiliation(s)
- Feng Tang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Meng-Hao Pan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yujie Lu
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xiang Wan
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yu Zhang
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Shao-Chen Sun
- College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
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160
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Sar D, Srivastava I, Misra SK, Ostadhossein F, Fathi P, Pan D. Copper-Catalyzed Syntheses of Pyrene-Pyrazole Pharmacophores and Structure Activity Studies for Tubulin Polymerization. ACS OMEGA 2018; 3:6378-6387. [PMID: 30221233 PMCID: PMC6130796 DOI: 10.1021/acsomega.8b00320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 06/05/2018] [Indexed: 05/04/2023]
Abstract
Tubulin polymerization is critical in mitosis process, which regulates uncontrolled cell divisions. Here, we report a new class of pyrene-pyrazole pharmacophore (PPP) for targeting microtubules. Syntheses of seven pyrenyl-substituted pyrazoles with side-chain modification at N-1 and C-3 positions of the pyrazole ring were accomplished from alkenyl hydrazones via C-N dehydrogenative cross-coupling using copper catalyst under aerobic condition. Tubulin polymerization with PPPs was investigated using docking and biological tools to reveal that these ligands are capable of influencing microtubule polymerization and their interaction with α-, β-tubulin active binding sites, which are substituent specific. Furthermore, cytotoxicity response of these PPPs was tested on cancer cells of different origin, such as MCF-7, MDA-MB231, and C32, and also noncancerous normal cells, such as MCF-10A. All newly synthesized PPPs showed excellent anticancer activities. The anticancer activities and half-maximal inhibitory concentration (IC50) values of all PPPs across different cancer cell lines (MCF-7, MDA-MB231, and C32) have been demonstrated. 1,3-Diphenyl-5-(pyren-1-yl)-1H-pyrazole was found to be best among all other PPPs in killing significant population of all of the cancerous cell with IC50 values 1 ± 0.5, 0.5 ± 0.2, and 5.0 ± 2.0 μM in MCF-7, MDA-MB231, and C32 cells, respectively.
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Affiliation(s)
- Dinabandhu Sar
- Department
of Bioengineering, Department of Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Mills
Breast Cancer Institute and Carle Foundation Hospital, 502 North Busey, Urbana, Illinois 61801, United States
| | - Indrajit Srivastava
- Department
of Bioengineering, Department of Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Mills
Breast Cancer Institute and Carle Foundation Hospital, 502 North Busey, Urbana, Illinois 61801, United States
| | - Santosh K. Misra
- Department
of Bioengineering, Department of Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Mills
Breast Cancer Institute and Carle Foundation Hospital, 502 North Busey, Urbana, Illinois 61801, United States
| | - Fatemeh Ostadhossein
- Department
of Bioengineering, Department of Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Mills
Breast Cancer Institute and Carle Foundation Hospital, 502 North Busey, Urbana, Illinois 61801, United States
| | - Parinaz Fathi
- Department
of Bioengineering, Department of Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Mills
Breast Cancer Institute and Carle Foundation Hospital, 502 North Busey, Urbana, Illinois 61801, United States
| | - Dipanjan Pan
- Department
of Bioengineering, Department of Materials Science and Engineering, and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
- Mills
Breast Cancer Institute and Carle Foundation Hospital, 502 North Busey, Urbana, Illinois 61801, United States
- E-mail:
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161
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Yang T, Du S, Liu X, Ye X, Wei X. Withdrawal from spinal application of remifentanil induces long-term potentiation of c-fiber-evoked field potentials by activation of Src family kinases in spinal microglia. Neurochem Res 2018; 43:1660-1670. [PMID: 29959648 DOI: 10.1007/s11064-018-2582-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 06/08/2018] [Accepted: 06/20/2018] [Indexed: 12/12/2022]
Abstract
It is well known that remifentanil, a widely used intravenous anesthesia drug, can paradoxically induce hyperalgesia. The underlying mechanisms are still not clear despite the wide investigations. The present study demonstrated that withdrawal from spinal application of remifentanil could dose-dependently induce long term potentiation (LTP) of C-fiber evoked field potentials. Remifentanil withdrawal could activate Src family kinases (SFKs) in microglia, and upregulate the expression of tumor necrosis factor alpha (TNFα) in spinal dorsal horn. Furthermore, pretreatment with either microglia inhibitor Minocycline, SFKs inhibitor PP2 or TNF αneutralization antibody could block remifentanil withdrawal induced spinal LTP, whereas supplement of recombinant rat TNFα to the spinal cord could reverse the inhibitory effect of Minocycline or PP2 on remifentanil withdrawal induced LTP. Our results suggested that TNFαrelease following SFKs activation in microglia is involved in the induction of LTP induced by remifentanil withdrawal.
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Affiliation(s)
- Tao Yang
- Department of Anesthesiology, SunYat-SenMemorial Hospital, SunYat-Sen University, 107 Yanjiang Xi Road, Guangzhou, People's Republic of China
| | - Sujuan Du
- Department of Anesthesiology, SunYat-SenMemorial Hospital, SunYat-Sen University, 107 Yanjiang Xi Road, Guangzhou, People's Republic of China
| | - Xianguo Liu
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, 510080, People's Republic of China.,Guangdong Provincial Key Laboratory of Brain Function and Disease, Guangzhou, Guangdong, People's Republic of China
| | - Xijiu Ye
- Department of Anesthesiology, SunYat-SenMemorial Hospital, SunYat-Sen University, 107 Yanjiang Xi Road, Guangzhou, People's Republic of China.
| | - Xuhong Wei
- Department of Physiology and Pain Research Center, Zhongshan School of Medicine, Sun Yat-sen University, 74 Zhongshan Road 2, Guangzhou, 510080, People's Republic of China. .,Guangdong Provincial Key Laboratory of Brain Function and Disease, Guangzhou, Guangdong, People's Republic of China.
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162
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Dave S, Anderson SJ, Sinha Roy P, Nsamba ET, Bunning AR, Fukuda Y, Gupta ML. Discrete regions of the kinesin-8 Kip3 tail differentially mediate astral microtubule stability and spindle disassembly. Mol Biol Cell 2018; 29:1866-1877. [PMID: 29874146 PMCID: PMC6085823 DOI: 10.1091/mbc.e18-03-0199] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
To function in diverse cellular processes, the dynamic properties of microtubules must be tightly regulated. Cellular microtubules are influenced by a multitude of regulatory proteins, but how their activities are spatiotemporally coordinated within the cell, or on specific microtubules, remains mostly obscure. The conserved kinesin-8 motor proteins are important microtubule regulators, and family members from diverse species combine directed motility with the ability to modify microtubule dynamics. Yet how kinesin-8 activities are appropriately deployed in the cellular context is largely unknown. Here we reveal the importance of the nonmotor tail in differentially controlling the physiological functions of the budding yeast kinesin-8, Kip3. We demonstrate that the tailless Kip3 motor domain adequately governs microtubule dynamics at the bud tip to allow spindle positioning in early mitosis. Notably, discrete regions of the tail mediate specific functions of Kip3 on astral and spindle microtubules. The region proximal to the motor domain operates to spatially regulate astral microtubule stability, while the distal tail serves a previously unrecognized role to control the timing of mitotic spindle disassembly. These findings provide insights into how nonmotor tail domains differentially control kinesin functions in cells and the mechanisms that spatiotemporally control the stability of cellular microtubules.
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Affiliation(s)
- Sandeep Dave
- Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011
| | - Samuel J Anderson
- Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011
| | - Pallavi Sinha Roy
- Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011
| | - Emmanuel T Nsamba
- Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011
| | - Angela R Bunning
- Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011
| | - Yusuke Fukuda
- Cell and Molecular Biology, The University of Chicago, Chicago, IL 60637
| | - Mohan L Gupta
- Genetics, Development and Cell Biology, Iowa State University, Ames, IA 50011
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163
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Brown A, Thatje S, Morris JP, Oliphant A, Morgan EA, Hauton C, Jones DOB, Pond DW. Metabolic costs imposed by hydrostatic pressure constrain bathymetric range in the lithodid crab Lithodes maja. ACTA ACUST UNITED AC 2018; 220:3916-3926. [PMID: 29093188 DOI: 10.1242/jeb.158543] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 09/05/2017] [Indexed: 01/16/2023]
Abstract
The changing climate is shifting the distributions of marine species, yet the potential for shifts in depth distributions is virtually unexplored. Hydrostatic pressure is proposed to contribute to a physiological bottleneck constraining depth range extension in shallow-water taxa. However, bathymetric limitation by hydrostatic pressure remains undemonstrated, and the mechanism limiting hyperbaric tolerance remains hypothetical. Here, we assess the effects of hydrostatic pressure in the lithodid crab Lithodes maja (bathymetric range 4-790 m depth, approximately equivalent to 0.1 to 7.9 MPa hydrostatic pressure). Heart rate decreased with increasing hydrostatic pressure, and was significantly lower at ≥10.0 MPa than at 0.1 MPa. Oxygen consumption increased with increasing hydrostatic pressure to 12.5 MPa, before decreasing as hydrostatic pressure increased to 20.0 MPa; oxygen consumption was significantly higher at 7.5-17.5 MPa than at 0.1 MPa. Increases in expression of genes associated with neurotransmission, metabolism and stress were observed between 7.5 and 12.5 MPa. We suggest that hyperbaric tolerance in Lmaja may be oxygen-limited by hyperbaric effects on heart rate and metabolic rate, but that Lmaja's bathymetric range is limited by metabolic costs imposed by the effects of high hydrostatic pressure. These results advocate including hydrostatic pressure in a complex model of environmental tolerance, where energy limitation constrains biogeographic range, and facilitate the incorporation of hydrostatic pressure into the broader metabolic framework for ecology and evolution. Such an approach is crucial for accurately projecting biogeographic responses to changing climate, and for understanding the ecology and evolution of life at depth.
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Affiliation(s)
- Alastair Brown
- University of Southampton, Ocean and Earth Science, European Way, Southampton SO14 3ZH, UK
| | - Sven Thatje
- University of Southampton, Ocean and Earth Science, European Way, Southampton SO14 3ZH, UK
| | - James P Morris
- University of Southampton, Ocean and Earth Science, European Way, Southampton SO14 3ZH, UK
| | - Andrew Oliphant
- University of Southampton, Ocean and Earth Science, European Way, Southampton SO14 3ZH, UK
| | - Elizabeth A Morgan
- University of Southampton, Ocean and Earth Science, European Way, Southampton SO14 3ZH, UK
| | - Chris Hauton
- University of Southampton, Ocean and Earth Science, European Way, Southampton SO14 3ZH, UK
| | - Daniel O B Jones
- National Oceanography Centre, University of Southampton Waterfront Campus, European Way, Southampton SO14 3ZH, UK
| | - David W Pond
- Scottish Association for Marine Science, Oban, Argyll PA37 1QA, UK
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164
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La Regina G, Bai R, Coluccia A, Naccarato V, Famiglini V, Nalli M, Masci D, Verrico A, Rovella P, Mazzoccoli C, Da Pozzo E, Cavallini C, Martini C, Vultaggio S, Dondio G, Varasi M, Mercurio C, Hamel E, Lavia P, Silvestri R. New 6- and 7-heterocyclyl-1H-indole derivatives as potent tubulin assembly and cancer cell growth inhibitors. Eur J Med Chem 2018; 152:283-297. [DOI: 10.1016/j.ejmech.2018.04.042] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/19/2018] [Accepted: 04/21/2018] [Indexed: 01/19/2023]
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165
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TAK1 activation of alpha-TAT1 and microtubule hyperacetylation control AKT signaling and cell growth. Nat Commun 2018; 9:1696. [PMID: 29703898 PMCID: PMC5923212 DOI: 10.1038/s41467-018-04121-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 04/04/2018] [Indexed: 01/04/2023] Open
Abstract
Acetylation of microtubules (MT) confers mechanical stability necessary for numerous functions including cell cycle and intracellular transport. Although αTAT1 is a major MT acetyltransferase, how this enzyme is regulated remains much less clear. Here we report TGF-β-activated kinase 1 (TAK1) as a key activator of αTAT1. TAK1 directly interacts with and phosphorylates αTAT1 at Ser237 to critically enhance its catalytic activity, as mutating this site to alanine abrogates, whereas a phosphomimetic induces MT hyperacetylation across cell types. Using a custom phospho-αTAT1-Ser237 antibody, we screen various mouse tissues to discover that brain contains some of the highest TAK1-dependent αTAT1 activity, which, accordingly, is diminished rapidly upon intra-cerebral injection of a TAK1 inhibitor. Lastly, we show that TAK1 selectively inhibits AKT to suppress mitogenic and metabolism-related pathways through MT-based mechanisms in culture and in vivo. Collectively, our findings support a fundamental new role for TGF-β signaling in MT-related functions and disease. Acetylation of microtubules (MT) confers mechanical stability necessary for numerous cellular functions but its regulation is unclear. Here the authors show that the MT acetyltransferase αTAT1 is regulated by TGF-β-activated kinase 1 implicating TGF-β signaling in MT-related functions and disease.
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166
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Parker AL, Teo WS, Pandzic E, Vicente JJ, McCarroll JA, Wordeman L, Kavallaris M. β-tubulin carboxy-terminal tails exhibit isotype-specific effects on microtubule dynamics in human gene-edited cells. Life Sci Alliance 2018; 1. [PMID: 30079401 PMCID: PMC6070155 DOI: 10.26508/lsa.201800059] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
This study used human gene-edited cell models and image analysis to reveal that the tubulin C-terminal tails specifically regulate the dynamics of individual microtubules and coordinate microtubule behavior across the cell. Microtubules are highly dynamic structures that play an integral role in fundamental cellular functions. Different α- and β-tubulin isotypes are thought to confer unique dynamic properties to microtubules. The tubulin isotypes have highly conserved structures, differing mainly in their carboxy-terminal (C-terminal) tail sequences. However, little is known about the importance of the C-terminal tail in regulating and coordinating microtubule dynamics. We developed syngeneic human cell models using gene editing to precisely modify the β-tubulin C-terminal tail region while preserving the endogenous microtubule network. Fluorescent microscopy of live cells, coupled with advanced image analysis, revealed that the β-tubulin C-terminal tails differentially coordinate the collective and individual dynamic behavior of microtubules by affecting microtubule growth rates and explorative microtubule assembly in an isotype-specific manner. Furthermore, βI- and βIII-tubulin C-terminal tails differentially regulate the sensitivity of microtubules to tubulin-binding agents and the microtubule depolymerizing protein mitotic centromere-associated kinesin. The sequence of the β-tubulin tail encodes regulatory information that instructs and coordinates microtubule dynamics, thereby fine-tuning microtubule dynamics to support cellular functions.
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Affiliation(s)
- Amelia L Parker
- Children's Cancer Institute, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia 2031.,Australian Centre for NanoMedicine and ARC Centre of Excellence for Convergent BioNano Science and Technology, UNSW Sydney, NSW, Australia 2052.,School of Women's and Children's Health, Faculty of Medicine, UNSW Sydney, NSW, Australia 2052
| | - Wee Siang Teo
- Children's Cancer Institute, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia 2031.,Australian Centre for NanoMedicine and ARC Centre of Excellence for Convergent BioNano Science and Technology, UNSW Sydney, NSW, Australia 2052.,School of Women's and Children's Health, Faculty of Medicine, UNSW Sydney, NSW, Australia 2052
| | - Elvis Pandzic
- Biomedical Imaging Facility, Mark Wainwright Analytical Centre, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia 2052
| | - Juan Jesus Vicente
- Department of Physiology and Biophysics, School of Medicine, University of Washington, Seattle, WA, USA 98195-7290
| | - Joshua A McCarroll
- Children's Cancer Institute, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia 2031.,Australian Centre for NanoMedicine and ARC Centre of Excellence for Convergent BioNano Science and Technology, UNSW Sydney, NSW, Australia 2052.,School of Women's and Children's Health, Faculty of Medicine, UNSW Sydney, NSW, Australia 2052
| | - Linda Wordeman
- Department of Physiology and Biophysics, School of Medicine, University of Washington, Seattle, WA, USA 98195-7290
| | - Maria Kavallaris
- Children's Cancer Institute, Lowy Cancer Research Centre, UNSW Sydney, NSW, Australia 2031.,Australian Centre for NanoMedicine and ARC Centre of Excellence for Convergent BioNano Science and Technology, UNSW Sydney, NSW, Australia 2052.,School of Women's and Children's Health, Faculty of Medicine, UNSW Sydney, NSW, Australia 2052
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167
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Chen J, Yu Q, Owen M, Han H, Powles S. Dinitroaniline herbicide resistance in a multiple-resistant Lolium rigidum population. PEST MANAGEMENT SCIENCE 2018; 74:925-932. [PMID: 29148165 DOI: 10.1002/ps.4790] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 11/03/2017] [Accepted: 11/13/2017] [Indexed: 05/03/2023]
Abstract
BACKGROUND The pre-emergence dinitroaniline herbicides (such as trifluralin and pendimethalin) are vital to Australian no-till farming systems. A Lolium rigidum population collected from the Western Australian grain belt with a 12-year trifluralin use history was characterised for resistance to dinitroaniline, acetyl CoA carboxylase (ACCase)- and acetolactate synthase (ALS)-inhibiting herbicides. Target-site resistance mechanisms were investigated. RESULTS This L. rigidum population exhibited 32-fold resistance to trifluralin, as compared with the susceptible population. It also displayed 12- to 30-fold cross-resistance to other dinitroaniline herbicides (pendimethalin, ethalfluralin and oryzalin). In addition, this population showed multiple resistance to commonly used post-emergence ACCase- and ALS-inhibiting herbicides. Two target-site α-tubulin gene mutations (Val-202-Phe and Thr-239-Ile) previously documented in other dinitroaniline-resistant weed species were identified, and some known target-site mutations in ACCase (Ile-1781-Leu, Asp-2078-Gly and Cys-2088-Arg) and ALS (Pro-197-Gln/Ser) were found in the same population. An agar-based Petri dish screening method was established for the rapid diagnosis of resistance to dinitroaniline herbicides. CONCLUSION Evolution of target-site resistance to both pre- and post-emergence herbicides was confirmed in a single L. rigidum population. The α-tubulin mutations Val-202-Phe and Thr-239-Ile, documented here for the first time in L. rigidum, are likely to be responsible for dinitroaniline resistance in this population. Early detection of dinitroaniline herbicide resistance and integrated weed management strategies are needed to maintain the effectiveness of dinitroaniline herbicides. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Jinyi Chen
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Qin Yu
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Mechelle Owen
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Heping Han
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
| | - Stephen Powles
- Australian Herbicide Resistance Initiative (AHRI), School of Agriculture & Environment, University of Western Australia, Crawley, Australia
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168
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Ma XH, Duan WJ, Mo YS, Chen JL, Li S, Zhao W, Yang L, Mi SQ, Mao XL, Wang H, Wang Q. Neuroprotective effect of paeoniflorin on okadaic acid-induced tau hyperphosphorylation via calpain/Akt/GSK-3β pathway in SH-SY5Y cells. Brain Res 2018; 1690:1-11. [PMID: 29596798 DOI: 10.1016/j.brainres.2018.03.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Revised: 03/15/2018] [Accepted: 03/16/2018] [Indexed: 12/13/2022]
Abstract
Abnormal phosphorylation of tau, one of the most common symptoms of dementia, has become increasingly important in the study of the etiology and development of Alzheimer's disease. Paeoniflorin, the main bioactive component of herbaceous peony, is a monoterpene glycoside, which has been reported to exert beneficial effects on neurodegenerative disease. However, the effect of paeoniflorin on tauopathies remains ambiguous. SH-SY5Y cells were treated with okadaic acid (OA) for 8 h to induce tau phosphorylation and no cell death was observed. Optical microscopy results showed that paeoniflorin ameliorated okadaic acid induced morphological changes, including cell swelling and synapsis shortening. Western blotting data illustrated that paeoniflorin reversed okadaic acid induced tau hyperphosphorylation, which was enhanced by inhibiting the activities of calpain, Akt and GSK-3β. Transmission electron microscopy results showed that paeoniflorin alone can reduce the number of autophagosomes and stabilize the microtubule structure. In addition, calpastain and paeoniflorin enhance the effect of paeoniflorin on stabilizing microtubules. In addition, calpastain markedly enhanced the effect of paeoniflorin on reversing okadaic acid-lowered fluorescence intensity of both MAP-2 and β III-tubulin, two microtubule-associated proteins. This study shows that paeoniflorin protected SH-SY5Y cells against okadaic acid assault by interfering with the calpain/Akt/GSK-3β-related pathways, in which autophagy might be involved. Besides, paeoniflorin is found to relieve the stress response of the microtubule structure system caused by okadaic acid treatment. The results presented in this study suggest that paeoniflorin potentially plays an important role in tauopathies.
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Affiliation(s)
- Xiao-Hui Ma
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Wen-Jun Duan
- College of Pharmacy, Jinan University, Guangzhou 510080, China
| | - You-Sheng Mo
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Jun-Li Chen
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Shi Li
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Wei Zhao
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Lei Yang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Sui-Qing Mi
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Xin-Liang Mao
- Department of Pharmacology, College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Hong Wang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China.
| | - Qi Wang
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou 510405, China.
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169
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Aktories K, Papatheodorou P, Schwan C. Binary Clostridium difficile toxin (CDT) - A virulence factor disturbing the cytoskeleton. Anaerobe 2018. [PMID: 29524654 DOI: 10.1016/j.anaerobe.2018.03.001] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Clostridium difficile infection causes antibiotics-associated diarrhea and pseudomembranous colitis. Major virulence factors of C. difficile are the Rho-glucosylating toxins TcdA and TcdB. In addition, many, so-called hypervirulent C. difficile strains produce the binary actin-ADP-ribosylating toxin CDT. CDT causes depolymerization of F-actin and rearrangement of the actin cytoskeleton. Thereby, many cellular functions, which depend on actin, are altered. CDT disturbs the dynamic balance between actin and microtubules in target cells. The toxin increases microtubule polymerization and induces the formation of microtubule-based protrusions at the plasma membrane of target cells. Moreover, CDT causes a redistribution of vesicles from the basolateral side to the apical side, where extracellular matrix proteins are released. These processes may increase the adherence of clostridia to target cells. Here, we review the effects of the action of CDT on the actin cytoskeleton and on the microtubule system.
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Affiliation(s)
- Klaus Aktories
- Institute of Experimental and Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Freiburg, Albertstr. 25, 79104 Freiburg, Germany; Centre for Biological Signalling Studies (BIOSS), University of Freiburg, 79104 Freiburg, Germany.
| | - Panagiotis Papatheodorou
- Faculty of Natural Sciences, University of Ulm, 89081 Ulm, Germany; Institute of Pharmacology and Toxicology, University of Ulm Medical Center, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Carsten Schwan
- Institute of Experimental and Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Freiburg, Albertstr. 25, 79104 Freiburg, Germany
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170
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Wang M, Zhang Y, Cai C, Tu J, Guo X, Zhang D. Sonoporation-induced cell membrane permeabilization and cytoskeleton disassembly at varied acoustic and microbubble-cell parameters. Sci Rep 2018; 8:3885. [PMID: 29497082 PMCID: PMC5832802 DOI: 10.1038/s41598-018-22056-8] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 02/15/2018] [Indexed: 11/30/2022] Open
Abstract
Sonoporation mediated by microbubbles has being extensively studied as a promising technique to facilitate gene/drug delivery to cells. Previous studies mainly explored the membrane-level responses to sonoporation. To provide in-depth understanding on this process, various sonoporation-induced cellular responses (e.g., membrane permeabilization and cytoskeleton disassembly) generated at different impact parameters (e.g., acoustic driving pressure and microbubble-cell distances) were systemically investigated in the present work. HeLa cells, whose α-tubulin cytoskeleton was labeled by incorporation of a green fluorescence protein (GFP)-α-tubulin fusion protein, were exposed to a single ultrasound pulse (1 MHz, 20 cycles) in the presence of microbubbles. Intracellular transport via sonoporation was assessed in real time using propidium iodide and the disassembly of α-tubulin cytoskeleton was observed by fluorescence microscope. Meanwhile, the dynamics of an interacting bubble-cell pair was theoretically simulated by boundary element method. Both the experimental observations and numerical simulations showed that, by increasing the acoustic pressure or reducing the bubble-cell distance, intensified deformation could be induced in the cellular membrane, which could result in enhanced intracellular delivery and cytoskeleton disassembly. The current results suggest that more tailored therapeutic strategies could be designed for ultrasound gene/drug delivery by adopting optimal bubble-cell distances and/or better controlling incident acoustic energy.
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Affiliation(s)
- Maochen Wang
- Key Laboratory of Modern Acoustics (MOE), Department of Physics, Collaborative Innovation Centre of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
| | - Yi Zhang
- Key Laboratory of Modern Acoustics (MOE), Department of Physics, Collaborative Innovation Centre of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
| | - Chenliang Cai
- Key Laboratory of Modern Acoustics (MOE), Department of Physics, Collaborative Innovation Centre of Advanced Microstructure, Nanjing University, Nanjing, 210093, China
| | - Juan Tu
- Key Laboratory of Modern Acoustics (MOE), Department of Physics, Collaborative Innovation Centre of Advanced Microstructure, Nanjing University, Nanjing, 210093, China.
| | - Xiasheng Guo
- Key Laboratory of Modern Acoustics (MOE), Department of Physics, Collaborative Innovation Centre of Advanced Microstructure, Nanjing University, Nanjing, 210093, China.
| | - Dong Zhang
- Key Laboratory of Modern Acoustics (MOE), Department of Physics, Collaborative Innovation Centre of Advanced Microstructure, Nanjing University, Nanjing, 210093, China.
- The State Key Laboratory of Acoustics, Chinese Academy of Science, Beijing, 10080, China.
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171
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Kou X, Wang X, Ji R, Liu L, Qiao Y, Lou Z, Ma C, Li S, Wang H, Ho CT. Occurrence, biological activity and metabolism of 6-shogaol. Food Funct 2018; 9:1310-1327. [PMID: 29417118 DOI: 10.1039/c7fo01354j] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2023]
Abstract
As one of the main bioactive compounds of dried ginger, 6-shogaol has been widely used to alleviate many ailments. It is also a major pungent flavor component, and its precursor prior to dehydration is 6-gingerol, which is reported to be responsible for the pungent flavor and biological activity of fresh ginger. Structurally, gingerols including 6-gingerol have a β-hydroxyl ketone moiety and is liable to dehydrate to generate an α,β-unsaturated ketone under heat and/or acidic conditions. The conjugation of the α,β-unsaturated ketone skeleton in the chemical structure of 6-shogaol explicates its higher potency and efficacy than 6-gingerol in terms of antioxidant, anti-inflammatory, anticancer, antiemetic and other bioactivities. Research on the health benefits of 6-shogaol has been conducted and results have been reported recently; however, scientific data are scattered due to a lack of systematic collection. In addition, action mechanisms of the preventive and/or therapeutic actions of 6-shogaol remain obscurely non-collective. Herein, we review the preparations, biological activity and mechanisms, and metabolism of 6-shogaol as well as the properties of 6-shogaol metabolites.
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Affiliation(s)
- Xingran Kou
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China. and School of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China and Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901-8520, USA.
| | - Xiaoqi Wang
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901-8520, USA.
| | - Ruya Ji
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901-8520, USA.
| | - Lang Liu
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901-8520, USA.
| | - Yening Qiao
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Zaixiang Lou
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China. and School of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Chaoyang Ma
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China. and School of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Shiming Li
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901-8520, USA.
| | - Hongxin Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China. and National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, People's Republic of China and School of Food Science and Technology, Jiangnan University, Wuxi 214122, People's Republic of China
| | - Chi-Tang Ho
- Department of Food Science, Rutgers University, 65 Dudley Road, New Brunswick, NJ 08901-8520, USA.
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172
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Kumar JSD, Solingapuram Sai KK, Prabhakaran J, Oufkir HR, Ramanathan G, Whitlow CT, Dileep H, Mintz A, Mann JJ. Radiosynthesis and in Vivo Evaluation of [ 11C]MPC-6827, the First Brain Penetrant Microtubule PET Ligand. J Med Chem 2018; 61:2118-2123. [PMID: 29457976 DOI: 10.1021/acs.jmedchem.8b00028] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Abnormalities of microtubules (MTs) are implicated in the pathogenesis of many CNS diseases. Despite the potential of an MT imaging agents, no PET ligand is currently available for in vivo imaging of MTs in the brain. We radiolabeled [11C]MPC-6827, a high affinity MTA, and demonstrated its specific binding in rat and mice brain using PET imaging. Our experiments show that [11C]MPC-6827 has specific binding to MT in brain, and it is the first MT-binding PET ligand.
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Affiliation(s)
- J S Dileep Kumar
- Molecular Imaging and Neuropathology Division , New York State Psychiatric Institute , 1051 Riverside Drive , New York , New York 10032 , United States
| | | | - Jaya Prabhakaran
- Molecular Imaging and Neuropathology Division , New York State Psychiatric Institute , 1051 Riverside Drive , New York , New York 10032 , United States.,Department of Psychiatry , Columbia University Medical Center , New York , New York 10032 , United States
| | - Hakeem R Oufkir
- Department of Radiology , Wake Forest Medical Center , Winston Salem , North Carolina 27157 , United States
| | - Gayathri Ramanathan
- Department of Radiology , Wake Forest Medical Center , Winston Salem , North Carolina 27157 , United States
| | - Christopher T Whitlow
- Department of Radiology , Wake Forest Medical Center , Winston Salem , North Carolina 27157 , United States
| | - Hima Dileep
- Molecular Imaging and Neuropathology Division , New York State Psychiatric Institute , 1051 Riverside Drive , New York , New York 10032 , United States.,Department of Psychiatry , Columbia University Medical Center , New York , New York 10032 , United States
| | - Akiva Mintz
- Department of Radiology , Wake Forest Medical Center , Winston Salem , North Carolina 27157 , United States
| | - J John Mann
- Molecular Imaging and Neuropathology Division , New York State Psychiatric Institute , 1051 Riverside Drive , New York , New York 10032 , United States.,Department of Psychiatry , Columbia University Medical Center , New York , New York 10032 , United States
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173
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Identification and characterization of SSE15206, a microtubule depolymerizing agent that overcomes multidrug resistance. Sci Rep 2018; 8:3305. [PMID: 29459693 PMCID: PMC5818492 DOI: 10.1038/s41598-018-21642-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Accepted: 02/06/2018] [Indexed: 12/31/2022] Open
Abstract
Microtubules are highly dynamic structures that form spindle fibres during mitosis and are one of the most validated cancer targets. The success of drugs targeting microtubules, however, is often limited by the development of multidrug resistance. Here we describe the discovery and characterization of SSE15206, a pyrazolinethioamide derivative [3-phenyl-5-(3,4,5-trimethoxyphenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamide] that has potent antiproliferative activities in cancer cell lines of different origins and overcomes resistance to microtubule-targeting agents. Treatment of cells with SSE15206 causes aberrant mitosis resulting in G2/M arrest due to incomplete spindle formation, a phenotype often associated with drugs that interfere with microtubule dynamics. SSE15206 inhibits microtubule polymerization both in biochemical and cellular assays by binding to colchicine site in tubulin as shown by docking and competition studies. Prolonged treatment of cells with the compound results in apoptotic cell death [increased Poly (ADP-ribose) polymerase cleavage and Annexin V/PI staining] accompanied by p53 induction. More importantly, we demonstrate that SSE15206 is able to overcome resistance to chemotherapeutic drugs in different cancer cell lines including multidrug-resistant KB-V1 and A2780-Pac-Res cell lines overexpressing MDR-1, making it a promising hit for the lead optimization studies to target multidrug resistance.
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174
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Gao Y, Mruk DD, Lui WY, Lee WM, Cheng CY. F5-peptide induces aspermatogenesis by disrupting organization of actin- and microtubule-based cytoskeletons in the testis. Oncotarget 2018; 7:64203-64220. [PMID: 27611949 PMCID: PMC5325436 DOI: 10.18632/oncotarget.11887] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 08/29/2016] [Indexed: 01/01/2023] Open
Abstract
During the release of sperm at spermiation, a biologically active F5-peptide, which can disrupt the Sertoli cell tight junction (TJ) permeability barrier, is produced at the site of the degenerating apical ES (ectoplasmic specialization). This peptide coordinates the events of spermiation and blood-testis barrier (BTB) remodeling at stage VIII of the epithelial cycle, creating a local apical ES-BTB axis to coordinate cellular events across the epithelium. The mechanism(s) by which F5-peptide perturbs BTB restructuring, and its involvement in apical ES dynamics remain unknown. F5-peptide, besides perturbing BTB integrity, was shown to induce germ cell release from the epithelium following its efficient in vivo overexpression in the testis. Overexpression of F5-peptide caused disorganization of actin- and microtubule (MT)-based cytoskeletons, mediated by altering the spatiotemporal expression of actin binding/regulatory proteins in the seminiferous epithelium. F5-peptide perturbed the ability of actin microfilaments and/or MTs from converting between their bundled and unbundled/defragmented configuration, thereby perturbing adhesion between spermatids and Sertoli cells. Since apical ES and basal ES/BTB are interconnected through the underlying cytoskeletal networks, this thus provides an efficient and novel mechanism to coordinate different cellular events across the epithelium during spermatogenesis through changes in the organization of actin microfilaments and MTs. These findings also illustrate the potential of F5-peptide being a male contraceptive peptide for men.
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Affiliation(s)
- Ying Gao
- The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, USA
| | - Dolores D Mruk
- The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, USA
| | - Wing-Yee Lui
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - Will M Lee
- School of Biological Sciences, The University of Hong Kong, Hong Kong, China
| | - C Yan Cheng
- The Mary M. Wohlford Laboratory for Male Contraceptive Research, Center for Biomedical Research, Population Council, New York, USA
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175
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Shikina S, Chiu YL, Chen CJ, Yang SH, Yao JIC, Chen CC, Wei JD, Shao ZF, Chang CF. Immunodetection of acetylated alpha-tubulin in stony corals: Evidence for the existence of flagella in coral male germ cells. Mol Reprod Dev 2017; 84:1285-1295. [PMID: 29064589 DOI: 10.1002/mrd.22927] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2017] [Revised: 10/09/2017] [Accepted: 10/17/2017] [Indexed: 12/11/2022]
Abstract
The molecular and cellular characteristics of male germ cell development remain largely unknown in corals. This study focused on the expression pattern of acetylated α-tubulin (Ac-α-Tu), which is involved in male germ cell development in various animals across taxa, to gain a better understanding of male germ cell development in the stony coral Euphyllia ancora. Immunohistochemical analysis of the different stages of male germ cells showed the presence of filamentous Ac-α-Tu in the early to late stages of male germ cells-such as spermatogonia, spermatocytes, and spermatids-as well as in the flagella of mature sperm. Immunocytochemical and transmission electron microscope analyses demonstrated that early-stage male germ cells possess long flagella containing Ac-α-Tu. The presence of filamentous Ac-α-Tu was also immunohistochemically demonstrated in the male germ cells from 14 other coral species, implying that possession of flagella with Ac-α-Tu is a common characteristic of male germ cells in stony corals. Therefore, as a distinctive cellular characteristic of male germ cells, Ac-α-Tu could be used as a male germ cell marker in stony corals; indeed, immunolabeling for Ac-α-Tu may be a useful method to aid in the identification and morphological observation of male germ cells in various corals in basic and applied biology (e.g., aquaculture) as well as in ecological studies.
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Affiliation(s)
- Shinya Shikina
- Institute of Marine Environment and Ecology, National Taiwan Ocean University, Keelung, Taiwan.,Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan
| | - Yi-Ling Chiu
- Doctoral degree Program in Marine Biotechnology, National Taiwan Ocean University, Keelung, Taiwan.,Doctoral degree Program in Marine Biotechnology, Academia Sinica, Taipei, Taiwan
| | - Chieh-Jhen Chen
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Shih-Han Yang
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Jack I-Chen Yao
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Che-Chun Chen
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Jiou-Di Wei
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Zih-Fang Shao
- Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
| | - Ching-Fong Chang
- Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, Taiwan.,Department of Aquaculture, National Taiwan Ocean University, Keelung, Taiwan
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176
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Arnst KE, Wang Y, Hwang DJ, Xue Y, Costello T, Hamilton D, Chen Q, Yang J, Park F, Dalton JT, Miller DD, Li W. A Potent, Metabolically Stable Tubulin Inhibitor Targets the Colchicine Binding Site and Overcomes Taxane Resistance. Cancer Res 2017; 78:265-277. [PMID: 29180476 DOI: 10.1158/0008-5472.can-17-0577] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 09/01/2017] [Accepted: 11/01/2017] [Indexed: 11/16/2022]
Affiliation(s)
- Kinsie E Arnst
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Yuxi Wang
- State Key Laboratory of Biotherapy and Cancer Center, Collaborative Innovation Center of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
- Department of Respiratory Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Dong-Jin Hwang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Yi Xue
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Terry Costello
- Department of Comparative Medicine, College of Medicine, the University of Tennessee Health Science Center, Memphis, Tennessee
| | - David Hamilton
- Department of Comparative Medicine, College of Medicine, the University of Tennessee Health Science Center, Memphis, Tennessee
| | - Qiang Chen
- State Key Laboratory of Biotherapy and Cancer Center, Collaborative Innovation Center of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Jinliang Yang
- State Key Laboratory of Biotherapy and Cancer Center, Collaborative Innovation Center of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Frank Park
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee
| | - James T Dalton
- College of Pharmacy, The University of Michigan, Ann Arbor, Michigan
| | - Duane D Miller
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee.
| | - Wei Li
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, Memphis, Tennessee.
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177
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Fan P, Zhang Y, Guo X, Cai C, Wang M, Yang D, Li Y, Tu J, Crum LA, Wu J, Zhang D. Cell-cycle-specific Cellular Responses to Sonoporation. Am J Cancer Res 2017; 7:4894-4908. [PMID: 29187912 PMCID: PMC5706108 DOI: 10.7150/thno.20820] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Accepted: 10/04/2017] [Indexed: 12/22/2022] Open
Abstract
Microbubble-mediated sonoporation has shown its great potential in facilitating intracellular uptake of gene/drugs and other therapeutic agents that are otherwise difficult to enter cells. However, the biophysical mechanisms underlying microbubble-cell interactions remain unclear. Particularly, it is still a major challenge to get a comprehensive understanding of the impact of cell cycle phase on the cellular responses simultaneously occurring in cell membrane and cytoskeleton induced by microbubble sonoporation. Methods: Here, efficient synchronizations were performed to arrest human cervical epithelial carcinoma (HeLa) cells in individual cycle phases. The, topography and stiffness of synchronized cells were examined using atomic force microscopy. The variations in cell membrane permeabilization and cytoskeleton arrangement induced by sonoporation were analyzed simultaneously by a real-time fluorescence imaging system. Results: The results showed that G1-phase cells typically had the largest height and elastic modulus, while S-phase cells were generally the flattest and softest ones. Consequently, the S-Phase was found to be the preferred cycle for instantaneous sonoporation treatment, due to the greatest enhancement of membrane permeability and the fastest cytoskeleton disassembly at the early stage after sonoporation. Conclusion: The current findings may benefit ongoing efforts aiming to pursue rational utilization of microbubble-mediated sonoporation in cell cycle-targeted gene/drug delivery for cancer therapy.
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178
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Li X, Liu X, Gao M, Han L, Qiu D, Wang H, Xiong B, Sun SC, Liu H, Gu L. HDAC3 promotes meiotic apparatus assembly in mouse oocytes by modulating tubulin acetylation. Development 2017; 144:3789-3797. [PMID: 28935703 DOI: 10.1242/dev.153353] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Accepted: 08/30/2017] [Indexed: 12/17/2022]
Abstract
Histone deacetylases (HDACs) have been shown to deacetylate numerous cellular substrates that govern a wide array of biological processes. HDAC3, a member of the Class I HDACs, is a highly conserved and ubiquitously expressed protein. However, its roles in meiotic oocytes are not known. In the present study, we find that mouse oocytes depleted of HDAC3 are unable to completely progress through meiosis, and are blocked at metaphase I. These HDAC3 knockdown oocytes show spindle/chromosome organization failure, with severely impaired kinetochore-microtubule attachments. Consistent with this, the level of BubR1, a central component of the spindle assembly checkpoint, at kinetochores is dramatically increased in metaphase oocytes following HDAC3 depletion. Knockdown and overexpression experiments reveal that HDAC3 modulates the acetylation status of α-tubulin in mouse oocytes. Importantly, the deacetylation mimetic mutant tubulin-K40R can partly rescue the defective phenotypes of HDAC3 knockdown oocytes. Our data support a model whereby HDAC3, through deacetylating tubulin, promotes microtubule stability and the establishment of kinetochore-microtubule interaction, consequently ensuring proper spindle morphology, accurate chromosome movement and orderly meiotic progression during oocyte maturation.
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Affiliation(s)
- Xiaoyan Li
- College of Animal Science & Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Xiaohui Liu
- College of Animal Science & Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Min Gao
- College of Animal Science & Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Longsen Han
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 211166 Nanjing, China
| | - Danhong Qiu
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 211166 Nanjing, China
| | - Haichao Wang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, 211166 Nanjing, China
| | - Bo Xiong
- College of Animal Science & Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Shao-Chen Sun
- College of Animal Science & Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Honglin Liu
- College of Animal Science & Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Ling Gu
- College of Animal Science & Technology, Nanjing Agricultural University, 210095 Nanjing, China
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179
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Onbulak S, Rzayev J. Synthesis and one‐dimensional assembly of cylindrical polymer nanoparticles prepared from tricomponent bottlebrush copolymers. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28771] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sebla Onbulak
- Department of ChemistryUniversity at Buffalo, The State University of New YorkBuffaloNew York14260‐3000
| | - Javid Rzayev
- Department of ChemistryUniversity at Buffalo, The State University of New YorkBuffaloNew York14260‐3000
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180
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Vleugel M, Kok M, Dogterom M. Understanding force-generating microtubule systems through in vitro reconstitution. Cell Adh Migr 2017; 10:475-494. [PMID: 27715396 PMCID: PMC5079405 DOI: 10.1080/19336918.2016.1241923] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
Microtubules switch between growing and shrinking states, a feature known as dynamic instability. The biochemical parameters underlying dynamic instability are modulated by a wide variety of microtubule-associated proteins that enable the strict control of microtubule dynamics in cells. The forces generated by controlled growth and shrinkage of microtubules drive a large range of processes, including organelle positioning, mitotic spindle assembly, and chromosome segregation. In the past decade, our understanding of microtubule dynamics and microtubule force generation has progressed significantly. Here, we review the microtubule-intrinsic process of dynamic instability, the effect of external factors on this process, and how the resulting forces act on various biological systems. Recently, reconstitution-based approaches have strongly benefited from extensive biochemical and biophysical characterization of individual components that are involved in regulating or transmitting microtubule-driven forces. We will focus on the current state of reconstituting increasingly complex biological systems and provide new directions for future developments.
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Affiliation(s)
- Mathijs Vleugel
- a Department of Bionanoscience , Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft Institute of Technology , Delft , The Netherlands
| | - Maurits Kok
- a Department of Bionanoscience , Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft Institute of Technology , Delft , The Netherlands
| | - Marileen Dogterom
- a Department of Bionanoscience , Kavli Institute of Nanoscience, Faculty of Applied Sciences, Delft Institute of Technology , Delft , The Netherlands
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181
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Parker AL, Teo WS, McCarroll JA, Kavallaris M. An Emerging Role for Tubulin Isotypes in Modulating Cancer Biology and Chemotherapy Resistance. Int J Mol Sci 2017; 18:ijms18071434. [PMID: 28677634 PMCID: PMC5535925 DOI: 10.3390/ijms18071434] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 06/24/2017] [Accepted: 06/27/2017] [Indexed: 12/19/2022] Open
Abstract
Tubulin proteins, as components of the microtubule cytoskeleton perform critical cellular functions throughout all phases of the cell cycle. Altered tubulin isotype composition of microtubules is emerging as a feature of aggressive and treatment refractory cancers. Emerging evidence highlighting a role for tubulin isotypes in differentially influencing microtubule behaviour and broader functional networks within cells is illuminating a complex role for tubulin isotypes regulating cancer biology and chemotherapy resistance. This review focuses on the role of different tubulin isotypes in microtubule dynamics as well as in oncogenic changes that provide a survival or proliferative advantage to cancer cells within the tumour microenvironment and during metastatic processes. Consideration of the role of tubulin isotypes beyond their structural function will be essential to improving the current clinical use of tubulin-targeted chemotherapy agents and informing the development of more effective cancer therapies.
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Affiliation(s)
- Amelia L Parker
- Tumour Biology and Targeting, Children's Cancer Institute, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW 2031, Australia.
- Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Wee Siang Teo
- Tumour Biology and Targeting, Children's Cancer Institute, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW 2031, Australia.
- Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Joshua A McCarroll
- Tumour Biology and Targeting, Children's Cancer Institute, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW 2031, Australia.
- Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, NSW 2052, Australia.
| | - Maria Kavallaris
- Tumour Biology and Targeting, Children's Cancer Institute, Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW 2031, Australia.
- Australian Centre for NanoMedicine, ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, University of New South Wales, Sydney, NSW 2052, Australia.
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182
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Podolski-Renić A, Banković J, Dinić J, Ríos-Luci C, Fernandes MX, Ortega N, Kovačević-Grujičić N, Martín VS, Padrón JM, Pešić M. DTA0100, dual topoisomerase II and microtubule inhibitor, evades paclitaxel resistance in P-glycoprotein overexpressing cancer cells. Eur J Pharm Sci 2017; 105:159-168. [DOI: 10.1016/j.ejps.2017.05.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/29/2017] [Accepted: 05/05/2017] [Indexed: 12/15/2022]
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183
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She ZY, Yang WX. Molecular mechanisms of kinesin-14 motors in spindle assembly and chromosome segregation. J Cell Sci 2017; 130:2097-2110. [DOI: 10.1242/jcs.200261] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
ABSTRACT
During eukaryote cell division, molecular motors are crucial regulators of microtubule organization, spindle assembly, chromosome segregation and intracellular transport. The kinesin-14 motors are evolutionarily conserved minus-end-directed kinesin motors that occur in diverse organisms from simple yeasts to higher eukaryotes. Members of the kinesin-14 motor family can bind to, crosslink or slide microtubules and, thus, regulate microtubule organization and spindle assembly. In this Commentary, we present the common subthemes that have emerged from studies of the molecular kinetics and mechanics of kinesin-14 motors, particularly with regard to their non-processive movement, their ability to crosslink microtubules and interact with the minus- and plus-ends of microtubules, and with microtubule-organizing center proteins. In particular, counteracting forces between minus-end-directed kinesin-14 and plus-end-directed kinesin-5 motors have recently been implicated in the regulation of microtubule nucleation. We also discuss recent progress in our current understanding of the multiple and fundamental functions that kinesin-14 motors family members have in important aspects of cell division, including the spindle pole, spindle organization and chromosome segregation.
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Affiliation(s)
- Zhen-Yu She
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wan-Xi Yang
- The Sperm Laboratory, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
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184
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Nogales E, Kellogg EH. Challenges and opportunities in the high-resolution cryo-EM visualization of microtubules and their binding partners. Curr Opin Struct Biol 2017. [PMID: 28628789 DOI: 10.1016/j.sbi.2017.06.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
As non-crystallizable polymers, microtubules have been the target of cryo-electron microscopy (cryo-EM) studies since the technique was first established. Over the years, image processing strategies have been developed that take care of the unique, pseudo-helical symmetry of the microtubule. With recent progress in data quality and data processing, cryo-EM reconstructions are now reaching resolutions that allow the generation of atomic models of microtubules and the factors that bind them. These include cellular partners that contribute to microtubule cellular functions, or small ligands that interfere with those functions in the treatment of cancer. The stage is set to generate a family portrait for all identified microtubule interacting proteins and to use cryo-EM as a drug development tool in the targeting of tubulin.
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Affiliation(s)
- Eva Nogales
- Molecular and Cell Biology Department and QB3 Institute, University of California Berkeley, CA 94720-3220, United States; Howard Hughes Medical Institute, University of California Berkeley, CA 94720-3220, United States; Molecular Biophysics and Integrative Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States.
| | - Elizabeth H Kellogg
- Molecular Biophysics and Integrative Bioimaging, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States
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185
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Kulshrestha A, Katara GK, Ibrahim SA, Patil R, Patil SA, Beaman KD. Microtubule inhibitor, SP-6-27 inhibits angiogenesis and induces apoptosis in ovarian cancer cells. Oncotarget 2017; 8:67017-67028. [PMID: 28978013 PMCID: PMC5620153 DOI: 10.18632/oncotarget.17549] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 03/21/2017] [Indexed: 01/21/2023] Open
Abstract
In ovarian cancer (OVCA), treatment failure due to chemo-resistance is a serious challenge. It is therefore critical to identify new therapies that are effective against resistant tumors and have reduced side effects. We recently identified 4-H-chromenes as tubulin depolymerizing agents that bind to colchicine site of beta-tubulin. Here, we screened a chemical library of substituted 4-H-chromenes and identified SP-6-27 to exhibit most potent anti-proliferative activity towards a panel of human cisplatin sensitive and resistant OVCA cell lines with 50% inhibitory concentration (IC50; mean ± SD) ranging from 0.10 ± 0.01 to 0.84 ± 0.20 μM. SP-6-27 exhibited minimum cytotoxicity to normal ovarian epithelia. A pronounced decrease in microtubule density as well as G2/M cell cycle arrest was observed in SP-6-27 treated cisplatin sensitive/resistant OVCA cells. The molecular mechanism of SP-6-27 induced cell death revealed modulation in cell-cycle regulation by upregulation of growth arrest and DNA damage inducible alpha transcripts (GADD45). An enhanced intrinsic apoptosis was observed in OVCA cells through upregulation of Bax, Apaf-1, caspase-6, -9, and caspase-3. In vitro wound healing assay revealed reduced OVCA cell migration upon SP-6-27 treatment. Additionally, SP-6-27 and cisplatin combinatorial treatment showed enhanced cytotoxicity in chemo-sensitive/resistant OVCA cells. Besides effect on cancer cells, SP-6-27 further restrained angiogenesis by inhibiting capillary tube formation by human umbilical vein endothelial cells (HUVEC). Together, these findings show that the chromene analog SP-6-27 is a novel chemotherapeutic agent that offers important advantages for the treatment of ovarian cancer.
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Affiliation(s)
- Arpita Kulshrestha
- Department of Microbiology and Immunology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, USA
| | - Gajendra K Katara
- Department of Microbiology and Immunology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, USA
| | - Safaa A Ibrahim
- Department of Microbiology and Immunology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, USA.,Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Giza, Egypt
| | - Renukadevi Patil
- Pharmaceutical Sciences Department, College of Pharmacy, Rosalind Franklin University of Medicine and Science, North Chicago, USA
| | - Shivaputra A Patil
- Pharmaceutical Sciences Department, College of Pharmacy, Rosalind Franklin University of Medicine and Science, North Chicago, USA
| | - Kenneth D Beaman
- Department of Microbiology and Immunology, Chicago Medical School, Rosalind Franklin University of Medicine and Science, North Chicago, USA
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186
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Avdoshina V, Caragher SP, Wenzel ED, Taraballi F, Mocchetti I, Harry GJ. The viral protein gp120 decreases the acetylation of neuronal tubulin: potential mechanism of neurotoxicity. J Neurochem 2017; 141:606-613. [PMID: 28295345 DOI: 10.1111/jnc.14015] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 02/10/2017] [Accepted: 02/28/2017] [Indexed: 01/18/2023]
Abstract
The human immunodeficiency virus (HIV) envelope protein gp120 promotes axonal damage and neurite pruning, similar to that observed in HIV-positive subjects with neurocognitive disorders. Thus, gp120 has been used to examine molecular and cellular pathways underlying HIV-mediated neuronal dysfunction. Gp120 binds to tubulin beta III, a component of neuronal microtubules. Microtubule function, which modulates the homeostasis of neurons, is regulated by polymerization and post-translational modifications. Based on these considerations, we tested the hypothesis that gp120 induces dynamic instability of neuronal microtubules. We first observed that gp120 prevents the normal polymerization of tubulin in vitro. We then tested whether gp120 alters the post-translational modifications in tubulin by examining the ability of gp120 to change the levels of acetylated tubulin in primary rat neuronal cultures. Gp120 elicited a time-dependent decrease in tubulin acetylation that was reversed by Helix-A peptide, a compound that competitively displaces the binding of gp120 to neuronal microtubules. To determine whether post-translational modifications in tubulin also occur in vivo, we measured acetylated tubulin in the cerebral cortex of HIV transgenic rats (HIV-tg). We observed a decrease in tubulin acetylation in 5- and 9-month-old HIV-tg rats when compared to age-matched wild type. Neither changes in microglia morphology nor alterations in mRNA levels for interleukin-1β and tumor necrosis factor α were detected in 5-month-old animals. Our findings propose neuronal microtubule instability as a novel mechanism of HIV neurotoxicity, without evidence of enhanced inflammation.
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Affiliation(s)
- Valeria Avdoshina
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Washington, Washington, District of Columbia, USA
| | - Seamus P Caragher
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Washington, Washington, District of Columbia, USA
| | - Erin D Wenzel
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Washington, Washington, District of Columbia, USA.,Department of Pharmacology and Physiology, Georgetown University Washington, Washington, District of Columbia, USA
| | - Francesca Taraballi
- Department of Regenerative Medicine, Houston Methodist Research Institute, Houston, Texas, USA
| | - Italo Mocchetti
- Laboratory of Preclinical Neurobiology, Department of Neuroscience, Georgetown University Washington, Washington, District of Columbia, USA
| | - Gaylia Jean Harry
- National Toxicology Program Laboratory, National Institute of Environmental Health Science, Research Triangle Park, North Carolina, USA
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187
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Bailon-Moscoso N, Cevallos-Solorzano G, Romero-Benavides JC, Orellana MIR. Natural Compounds as Modulators of Cell Cycle Arrest: Application for Anticancer Chemotherapies. Curr Genomics 2017; 18:106-131. [PMID: 28367072 PMCID: PMC5345333 DOI: 10.2174/1389202917666160808125645] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Revised: 11/13/2015] [Accepted: 11/20/2015] [Indexed: 12/22/2022] Open
Abstract
Natural compounds from various plants, microorganisms and marine species play an important role in the discovery novel components that can be successfully used in numerous biomedical applications, including anticancer therapeutics. Since uncontrolled and rapid cell division is a hallmark of cancer, unraveling the molecular mechanisms underlying mitosis is key to understanding how various natural compounds might function as inhibitors of cell cycle progression. A number of natural compounds that inhibit the cell cycle arrest have proven effective for killing cancer cells in vitro, in vivo and in clinical settings. Significant advances that have been recently made in the understanding of molecular mechanisms underlying the cell cycle regulation using the chemotherapeutic agents is of great importance for improving the efficacy of targeted therapeutics and overcoming resistance to anticancer drugs, especially of natural origin, which inhibit the activities of cyclins and cyclin-dependent kinases, as well as other proteins and enzymes involved in proper regulation of cell cycle leading to controlled cell proliferation.
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188
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Prinz H, Ridder AK, Vogel K, Böhm KJ, Ivanov I, Ghasemi JB, Aghaee E, Müller K. N-Heterocyclic (4-Phenylpiperazin-1-yl)methanones Derived from Phenoxazine and Phenothiazine as Highly Potent Inhibitors of Tubulin Polymerization. J Med Chem 2017; 60:749-766. [PMID: 28045256 DOI: 10.1021/acs.jmedchem.6b01591] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report here a series of 27 10-(4-phenylpiperazin-1-yl)methanones derived from tricyclic heterocycles which were screened for effects on tumor cell growth, inhibition of tubulin polymerization, and induction of cell cycle arrest. Several analogues, among them the 10-(4-(3-methoxyphenyl)piperazine-1-carbonyl)-10H-phenoxazine-3-carbonitrile (16o), showed excellent antiproliferative properties, with low nanomolar GI50 values (16o, mean GI50 of 3.3 nM) against a large number (93) of cancer cell lines. Fifteen compounds potently inhibited tubulin polymerization. Analysis of cell cycle by flow cytometry revealed that inhibition of tumor cell growth was related to an induction of G2/M phase cell cycle blockade. Western blotting and molecular docking studies suggested that these compounds bind efficiently to β-tubulin at the colchicine binding site. Our studies demonstrate the suitability of the phenoxazine and phenothiazine core and also of the phenylpiperazine moiety for the development of novel and potent tubulin polymerization inhibitors.
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Affiliation(s)
- Helge Prinz
- Institute of Pharmaceutical and Medicinal Chemistry, Westphalian Wilhelms-University , Corrensstraße 48, D-48149 Münster, Germany
| | - Ann-Kathrin Ridder
- Institute of Pharmaceutical and Medicinal Chemistry, Westphalian Wilhelms-University , Corrensstraße 48, D-48149 Münster, Germany
| | - Kirsten Vogel
- Institute of Pharmaceutical and Medicinal Chemistry, Westphalian Wilhelms-University , Corrensstraße 48, D-48149 Münster, Germany
| | - Konrad J Böhm
- Leibniz Institute on Aging-Fritz Lipmann Institute (FLI) , Beutenbergstrasse 11, D-07745 Jena, Germany
| | - Igor Ivanov
- Oncolead GmbH & Co. KG , Zugspitzstraße 5, D-85757 Karlsfeld, Germany
| | - Jahan B Ghasemi
- Drug Design in Silico Lab, Chemistry Faculty, School of Sciences, University of Tehran , Teheran, Iran
| | - Elham Aghaee
- Drug Design in Silico Lab, Chemistry Faculty, School of Sciences, University of Tehran , Teheran, Iran
| | - Klaus Müller
- Institute of Pharmaceutical and Medicinal Chemistry, Westphalian Wilhelms-University , Corrensstraße 48, D-48149 Münster, Germany
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189
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Lai SR, Castello SA, Robinson AC, Koehler JW. In vitro anti-tubulin effects of mebendazole and fenbendazole on canine glioma cells. Vet Comp Oncol 2017; 15:1445-1454. [PMID: 28078780 DOI: 10.1111/vco.12288] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 10/12/2016] [Accepted: 10/13/2016] [Indexed: 01/19/2023]
Abstract
Benzimidazole anthelmintics have reported anti-neoplastic effects both in vitro and in vivo. The purpose of this study was to evaluate the in vitro chemosensitivity of three canine glioma cell lines to mebendazole and fenbendazole. The mean inhibitory concentration (IC50 ) (±SD) obtained from performing the MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay after treating J3T, G06-A, and SDT-3G cells for 72 h with mebendazole were 0.030 ± 0.003, 0.080 ± 0.015 and 0.030 ± 0.006 μM respectively, while those for fenbendazole were 0.550 ± 0.015, 1.530 ± 0.159 and 0.690 ± 0.095 μM; treatment of primary canine fibroblasts for 72 h at IC50 showed no significant effect. Immunofluorescence studies showed disruption of tubulin after treatment. Mebendazole and fenbendazole are cytotoxic in canine glioma cell lines in vitro and may be good candidates for treatment of canine gliomas. Further in vivo studies are required.
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Affiliation(s)
- S R Lai
- Department of Clinical Sciences, Auburn University College of Veterinary Medicine, Auburn, AL, USA
| | - S A Castello
- Undergraduate Honors College, Auburn University, Auburn, AL, USA
| | - A C Robinson
- Undergraduate Honors College, Auburn University, Auburn, AL, USA
| | - J W Koehler
- Department of Pathobiology, Auburn University College of Veterinary Medicine, Auburn, AL, USA
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190
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Quinn CM, Polenova T. Structural biology of supramolecular assemblies by magic-angle spinning NMR spectroscopy. Q Rev Biophys 2017; 50:e1. [PMID: 28093096 PMCID: PMC5483179 DOI: 10.1017/s0033583516000159] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In recent years, exciting developments in instrument technology and experimental methodology have advanced the field of magic-angle spinning (MAS) nuclear magnetic resonance (NMR) to new heights. Contemporary MAS NMR yields atomic-level insights into structure and dynamics of an astounding range of biological systems, many of which cannot be studied by other methods. With the advent of fast MAS, proton detection, and novel pulse sequences, large supramolecular assemblies, such as cytoskeletal proteins and intact viruses, are now accessible for detailed analysis. In this review, we will discuss the current MAS NMR methodologies that enable characterization of complex biomolecular systems and will present examples of applications to several classes of assemblies comprising bacterial and mammalian cytoskeleton as well as human immunodeficiency virus 1 and bacteriophage viruses. The body of work reviewed herein is representative of the recent advancements in the field, with respect to the complexity of the systems studied, the quality of the data, and the significance to the biology.
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Affiliation(s)
- Caitlin M. Quinn
- University of Delaware, Department of Chemistry and Biochemistry, Newark, DE 19711; Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Pittsburgh, PA 15306
| | - Tatyana Polenova
- University of Delaware, Department of Chemistry and Biochemistry, Newark, DE 19711; Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Pittsburgh, PA 15306
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191
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Benhamman R, Bai F, Drory SB, Loubert-Hudon A, Ellis B, Matton DP. The Arabidopsis Mitogen-Activated Protein Kinase Kinase Kinase 20 (MKKK20) Acts Upstream of MKK3 and MPK18 in Two Separate Signaling Pathways Involved in Root Microtubule Functions. FRONTIERS IN PLANT SCIENCE 2017; 8:1352. [PMID: 28848569 PMCID: PMC5550695 DOI: 10.3389/fpls.2017.01352] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 07/19/2017] [Indexed: 05/04/2023]
Abstract
Mitogen-activated protein kinase (MAPK) signaling networks represent important means of signal transduction in plants and other eukaryotes, controlling intracellular signaling by linking perception of environmental or developmental cues to downstream targets. In the Arabidopsis MEKK subfamily, the MKKK19, 20, and 21 form a highly supported clade with the Solanaceous Fertilization-Related Kinases. In Arabidopsis, little is known about this group, except for MKKK20, which is involved in osmotic stress. Using a directed MKKK-MKK yeast two-hybrid (Y2H) screen, MKKK20 was found to interact only with MKK3, while a MKKK20 large-scale Y2H screen retrieved MPK18 as a direct interactant. In vitro phosphorylation assays showed that MKKK20 phosphorylates both MKK3 and MPK18. However, when all three kinases are combined, no synergistic effect is observed on MPK18 phosphorylation, suggesting a direct access to MPK18, consistent with the absence of interaction between MKK3 and MPK18 in protein-protein interaction assays. Since mpk18 mutant plants were previously shown to be defective in microtubule-related functions, phenotypes of mkkk20 single and mkkk20/mpk18 double mutants were investigated to determine if MKKK20 acts upstream of MPK18. This was the case, as mkkk20 root length was shorter than WT in media containing microtubule-disrupting drugs as previously observed for mpk18 plants. Surprisingly, mkk3 plants were also similarly affected, suggesting the presence of two non-complementary pathways involved in Arabidopsis cortical microtubule function, the first including MKKK20, MKK3 and an unknown MPK; the second, a non-canonical MAPK cascade made of MKKK20 and MPK18 that bypasses the need for an MKK intermediate.
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Affiliation(s)
- Rachid Benhamman
- Institut de Recherche en Biologie Végétale, Département de Sciences Biologiques, Université de Montréal, MontréalQC, Canada
| | - Fangwen Bai
- Institut de Recherche en Biologie Végétale, Département de Sciences Biologiques, Université de Montréal, MontréalQC, Canada
| | - Samuel B. Drory
- Institut de Recherche en Biologie Végétale, Département de Sciences Biologiques, Université de Montréal, MontréalQC, Canada
| | - Audrey Loubert-Hudon
- Institut de Recherche en Biologie Végétale, Département de Sciences Biologiques, Université de Montréal, MontréalQC, Canada
| | - Brian Ellis
- Michael Smith Laboratories, University of British Columbia, VancouverBC, Canada
| | - Daniel P. Matton
- Institut de Recherche en Biologie Végétale, Département de Sciences Biologiques, Université de Montréal, MontréalQC, Canada
- *Correspondence: Daniel P. Matton,
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192
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Protein self-assembly onto nanodots leads to formation of conductive bio-based hybrids. Sci Rep 2016; 6:38252. [PMID: 27922059 PMCID: PMC5138619 DOI: 10.1038/srep38252] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 11/07/2016] [Indexed: 11/29/2022] Open
Abstract
The next generation of nanowires that could advance the integration of functional nanosystems into synthetic applications from photocatalysis to optical devices need to demonstrate increased ability to promote electron transfer at their interfaces while ensuring optimum quantum confinement. Herein we used the biological recognition and the self-assembly properties of tubulin, a protein involved in building the filaments of cellular microtubules, to create stable, free standing and conductive sulfur-doped carbon nanodots-based conductive bio-hybrids. The physical and chemical properties (e.g., composition, morphology, diameter etc.) of such user-synthesized hybrids were investigated using atomic and spectroscopic techniques, while the electron transfer rate was estimated using peak currents formed during voltammetry scanning. Our results demonstrate the ability to create individually hybrid nanowires capable to reduce energy losses; such hybrids could possibly be used in the future for the advancement and implementation into nanometer-scale functional devices.
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193
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Smit FX, Luiken JA, Bolhuis PG. Primary Fibril Nucleation of Aggregation Prone Tau Fragments PHF6 and PHF6. J Phys Chem B 2016; 121:3250-3261. [PMID: 27776213 DOI: 10.1021/acs.jpcb.6b07045] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We performed replica exchange molecular dynamics and forward flux sampling simulations of hexapeptide VQIINK and VQIVYK systems, also known as, respectively, fragments PHF6* and PHF6 from the tau protein. Being a part of the microtubule binding region, these fragments are known to be aggregation prone, and at least one of them is a prerequisite for fibril formation of the tau protein. Using a coarse-grained force field, we establish the phase behavior of both fragments, and investigate the nucleation kinetics for the conversion into a β-sheet fibril. As the conversion is, in principle, a reversible process, we predict the rate constants for both the fibril formation and melting, and examine the corresponding mechanisms. Our simulations indicate that, while both fragments form disordered aggregates, only PHF6 is able to form β-sheet fibrils. This observation provides a possible explanation for the lack of available steric zipper crystal structures for PHF6*.
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Affiliation(s)
- Florent X Smit
- van't Hoff Institute for Molecular Sciences, University of Amsterdam , PO Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Jurriaan A Luiken
- van't Hoff Institute for Molecular Sciences, University of Amsterdam , PO Box 94157, 1090 GD Amsterdam, The Netherlands
| | - Peter G Bolhuis
- van't Hoff Institute for Molecular Sciences, University of Amsterdam , PO Box 94157, 1090 GD Amsterdam, The Netherlands
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194
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Reuther C, Diego AL, Diez S. Kinesin-1 motors can increase the lifetime of taxol-stabilized microtubules. NATURE NANOTECHNOLOGY 2016; 11:914-915. [PMID: 27821845 DOI: 10.1038/nnano.2016.231] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Affiliation(s)
- Cordula Reuther
- B CUBE - Center for Molecular Bioengineering, Technische Universität Dresden, 01069 Dresden, Germany
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Alejandra Laguillo Diego
- B CUBE - Center for Molecular Bioengineering, Technische Universität Dresden, 01069 Dresden, Germany
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
| | - Stefan Diez
- B CUBE - Center for Molecular Bioengineering, Technische Universität Dresden, 01069 Dresden, Germany
- Max Planck Institute of Molecular Cell Biology and Genetics, 01307 Dresden, Germany
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195
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Furtado LFV, de Paiva Bello ACP, Rabelo ÉML. Benzimidazole resistance in helminths: From problem to diagnosis. Acta Trop 2016; 162:95-102. [PMID: 27338184 DOI: 10.1016/j.actatropica.2016.06.021] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Revised: 06/16/2016] [Accepted: 06/18/2016] [Indexed: 11/29/2022]
Abstract
Helminth parasites cause significant morbidity and mortality in endemic countries. Given the severity of symptoms that helminths may elicit in the host, intervention with prophylactic and therapeutic measures is imperative. Treatment with benzimidazoles is the most widely used means of combatting these parasites. However, widespread use of these drugs can select for drug-resistant parasite strains. In this review, we approach the problem of benzimidazole resistance in helminths in both humans and animals, focusing on the properties of the drug, the molecular mechanisms of drug resistance and how resistance is diagnosed.
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Affiliation(s)
- Luis Fernando Viana Furtado
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Ana Cristina Passos de Paiva Bello
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil
| | - Élida Mara Leite Rabelo
- Universidade Federal de Minas Gerais, Instituto de Ciências Biológicas, Avenida Presidente Antônio Carlos, 6627, Departamento de Parasitologia, L4 237, Laboratório de Parasitologia Molecular, Pampulha, CEP 31270-901, Belo Horizonte, Minas Gerais, Brazil.
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196
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Charafeddine RA, Nosanchuk JD, Sharp DJ. Targeting Microtubules for Wound Repair. Adv Wound Care (New Rochelle) 2016; 5:444-454. [PMID: 27785378 DOI: 10.1089/wound.2015.0658] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 09/08/2015] [Indexed: 12/16/2022] Open
Abstract
Significance: Fast and seamless healing is essential for both deep and chronic wounds to restore the skin and protect the body from harmful pathogens. Thus, finding new targets that can both expedite and enhance the repair process without altering the upstream signaling milieu and causing serious side effects can improve the way we treat wounds. Since cell migration is key during the different stages of wound healing, it presents an ideal process and intracellular structural machineries to target. Recent Advances and Critical Issues: The microtubule (MT) cytoskeleton is rising as an important structural and functional regulator of wound healing. MTs have been reported to play different roles in the migration of the various cell types involved in wound healing. Specific microtubule regulatory proteins (MRPs) can be targeted to alter a section or subtype of the MT cytoskeleton and boost or hinder cell motility. However, inhibiting intracellular components can be challenging in vivo, especially using unstable molecules, such as small interfering RNA. Nanoparticles can be used to protect these unstable molecules and topically deliver them to the wound. Utilizing this approach, we recently showed that fidgetin-like 2, an uncharacterized MRP, can be targeted to enhance cell migration and wound healing. Future Directions: To harness the full potential of the current MRP therapeutic targets, studies should test them with different delivery platforms, dosages, and skin models. Screening for new MT effectors that boost cell migration in vivo would also help find new targets for skin repair.
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Affiliation(s)
- Rabab A. Charafeddine
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York
| | - Joshua D. Nosanchuk
- Department of Medicine, Albert Einstein College of Medicine, Bronx, New York
| | - David J. Sharp
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, New York
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197
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Yagdi E, Cerella C, Dicato M, Diederich M. Garlic-derived natural polysulfanes as hydrogen sulfide donors: Friend or foe? Food Chem Toxicol 2016; 95:219-33. [DOI: 10.1016/j.fct.2016.07.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 07/13/2016] [Accepted: 07/14/2016] [Indexed: 02/06/2023]
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198
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Beller DA, Nelson DR. Plastic deformation of tubular crystals by dislocation glide. Phys Rev E 2016; 94:033004. [PMID: 27739811 DOI: 10.1103/physreve.94.033004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Indexed: 06/06/2023]
Abstract
Tubular crystals, two-dimensional lattices wrapped into cylindrical topologies, arise in many contexts, including botany and biofilaments, and in physical systems such as carbon nanotubes. The geometrical principles of botanical phyllotaxis, describing the spiral packings on cylinders commonly found in nature, have found application in all these systems. Several recent studies have examined defects in tubular crystals associated with crystalline packings that must accommodate a fixed tube radius. Here we study the mechanics of tubular crystals with variable tube radius, with dislocations interposed between regions of different phyllotactic packings. Unbinding and separation of dislocation pairs with equal and opposite Burgers vectors allow the growth of one phyllotactic domain at the expense of another. In particular, glide separation of dislocations offers a low-energy mode for plastic deformations of solid tubes in response to external stresses, reconfiguring the lattice step by step. Through theory and simulation, we examine how the tube's radius and helicity affects, and is in turn altered by, the mechanics of dislocation glide. We also discuss how a sufficiently strong bending rigidity can alter or arrest the deformations of tubes with small radii.
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Affiliation(s)
- Daniel A Beller
- John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
| | - David R Nelson
- Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
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199
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Hori A, Toda T. Regulation of centriolar satellite integrity and its physiology. Cell Mol Life Sci 2016; 74:213-229. [PMID: 27484406 PMCID: PMC5219025 DOI: 10.1007/s00018-016-2315-x] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 07/14/2016] [Accepted: 07/21/2016] [Indexed: 01/01/2023]
Abstract
Centriolar satellites comprise cytoplasmic granules that are located around the centrosome. Their molecular identification was first reported more than a quarter of a century ago. These particles are not static in the cell but instead constantly move around the centrosome. Over the last decade, significant advances in their molecular compositions and biological functions have been achieved due to comprehensive proteomics and genomics, super-resolution microscopy analyses and elegant genetic manipulations. Centriolar satellites play pivotal roles in centrosome assembly and primary cilium formation through the delivery of centriolar/centrosomal components from the cytoplasm to the centrosome. Their importance is further underscored by the fact that mutations in genes encoding satellite components and regulators lead to various human disorders such as ciliopathies. Moreover, the most recent findings highlight dynamic structural remodelling in response to internal and external cues and unexpected positive feedback control that is exerted from the centrosome for centriolar satellite integrity.
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Affiliation(s)
- Akiko Hori
- Lincoln's Inn Fields Laboratory, The Francis Crick Institute, 44 Lincoln's Inn Fields, London, WC2A 3LY, UK.,Developmental Biomedical Science, Graduate School of Biological Sciences, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama, Ikoma, Nara, 630-0192, Japan
| | - Takashi Toda
- Lincoln's Inn Fields Laboratory, The Francis Crick Institute, 44 Lincoln's Inn Fields, London, WC2A 3LY, UK. .,Department of Molecular Biotechnology, Hiroshima Research Center for Healthy Aging (HiHA), Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, 739-8530, Japan.
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200
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Rüdiger AT, Mayrhofer P, Ma-Lauer Y, Pohlentz G, Müthing J, von Brunn A, Schwegmann-Weßels C. Tubulins interact with porcine and human S proteins of the genus Alphacoronavirus and support successful assembly and release of infectious viral particles. Virology 2016; 497:185-197. [PMID: 27479465 PMCID: PMC7111311 DOI: 10.1016/j.virol.2016.07.022] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 07/16/2016] [Accepted: 07/18/2016] [Indexed: 01/05/2023]
Abstract
Coronavirus spike proteins mediate host-cell-attachment and virus entry. Virus replication takes place within the host cell cytosol, whereas assembly and budding occur at the endoplasmic reticulum-Golgi intermediate compartment. In this study we demonstrated that the last 39 amino acid stretches of Alphacoronavirus spike cytoplasmic domains of the human coronavirus 229E, NL63, and the porcine transmissible gastroenteritis virus TGEV interact with tubulin alpha and beta chains. In addition, a partial co-localization of TGEV spike proteins with authentic host cell β-tubulin was observed. Furthermore, drug-induced microtubule depolymerization led to changes in spike protein distribution, a reduction in the release of infectious virus particles and less amount of spike protein incorporated into virions. These data demonstrate that interaction of Alphacoronavirus spike proteins with tubulin supports S protein transport and incorporation into virus particles. The cytoplasmic domain of coronavirus S proteins interacts with tubulin. Microtubule depolymerization influences S protein distribution. Viral titers are reduced after microtubule depolymerization. S protein incorporation into virus particles depends on intact microtubule.
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Affiliation(s)
- Anna-Theresa Rüdiger
- Institute of Virology, University of Veterinary Medicine Hannover, Bünteweg 17, 30559 Hannover, Germany
| | - Peter Mayrhofer
- Virology Department, Max-von-Pettenkofer Institute, Ludwig-Maximilians University Munich, Pettenkoferstraße 9a, 80336 Munich, Germany
| | - Yue Ma-Lauer
- Virology Department, Max-von-Pettenkofer Institute, Ludwig-Maximilians University Munich, Pettenkoferstraße 9a, 80336 Munich, Germany
| | - Gottfried Pohlentz
- Institute for Hygiene, University of Münster, Robert-Koch-Straße 41, 48149 Münster, Germany
| | - Johannes Müthing
- Institute for Hygiene, University of Münster, Robert-Koch-Straße 41, 48149 Münster, Germany
| | - Albrecht von Brunn
- Virology Department, Max-von-Pettenkofer Institute, Ludwig-Maximilians University Munich, Pettenkoferstraße 9a, 80336 Munich, Germany; German Centers for Infection Research (DZIF), Ludwig-Maximilians-University Munich, Germany.
| | - Christel Schwegmann-Weßels
- Institute of Virology, University of Veterinary Medicine Hannover, Bünteweg 17, 30559 Hannover, Germany.
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