1
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Liu X, Lu L, Zhang N, Jiang W. Regulator-carrying dual-responsive integrated AuNP composite fluorescence probe for in situ real time monitoring apoptosis progression. Talanta 2024; 269:125507. [PMID: 38056417 DOI: 10.1016/j.talanta.2023.125507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/17/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023]
Abstract
Apoptosis is a typical programmed death mode with complex molecular regulation mechanisms. Developing advanced strategies to monitor apoptosis progression is conducive to disease treatment related with apoptosis. Herein, we developed a regulator-carrying dual-responsive integrated AuNP composite fluorescence probe for in situ real time monitoring apoptosis progression. The nanoprobe is constructed by modifying specially designed double-stranded DNA (dsDNA) and caspase 3-specific cleavable peptides (pep) to the surface of AuNP. After uptake by cells, the nanoprobe recognizes miRNA 21 and triggers fluorescence recovery, enabling silencing and imaging of the upstream signaling molecule miRNA 21. Once miRNA 21 is silenced, the downstream signaling molecule caspase 3 is activated and cleaves the substrate peptides, and fluorescence is restored for in situ imaging of caspase 3. The apoptosis induced by silencing miRNA 21 has been successfully implemented in HeLa and A549 cells. The expression level of miRNA 21 and corresponding changes of caspase 3 have also been effectively monitored. These results suggested this nanoprobe will be a potential tool for apoptosis-related biomedical research and clinical application.
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Affiliation(s)
- Xiaoting Liu
- Research Center of Basic Medicine, Breast Center, Jinan Central Hospital, Shandong University, 250013, Jinan, PR China; School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, PR China
| | - Ling Lu
- Research Center of Basic Medicine, Breast Center, Jinan Central Hospital, Shandong University, 250013, Jinan, PR China
| | - Nan Zhang
- Research Center of Basic Medicine, Breast Center, Jinan Central Hospital, Shandong University, 250013, Jinan, PR China.
| | - Wei Jiang
- School of Chemistry and Chemical Engineering, Shandong University, 250100, Jinan, PR China.
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2
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Moustafa GO, Shalaby A, Naglah AM, Mounier MM, El-Sayed H, Anwar MM, Nossier ES. Synthesis, Characterization, In Vitro Anticancer Potentiality, and Antimicrobial Activities of Novel Peptide-Glycyrrhetinic-Acid-Based Derivatives. Molecules 2021; 26:4573. [PMID: 34361728 PMCID: PMC8346995 DOI: 10.3390/molecules26154573] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/23/2021] [Accepted: 07/23/2021] [Indexed: 01/10/2023] Open
Abstract
Glycyrrhetinic acid (GA) is one of many interesting pentacyclic triterpenoids showing significant anticancer activity by triggering apoptosis in tumor cell lines. This study deals with the design and synthesis of new glycyrrhetinic acid (GA)-amino acid peptides and peptide ester derivatives. The structures of the new derivatives were established through various spectral and microanalytical data. The novel compounds were screened for their in vitro cytotoxic activity. The evaluation results showed that the new peptides produced promising cytotoxic activity against the human breast MCF-7 cancer cell line while comparing to doxorubicin. On the other hand, only compounds 3, 5, and 7 produced potent activity against human colon HCT-116 cancer cell line. The human liver cancer (HepG-2) cell line represented a higher sensitivity to peptide 7 (IC50; 3.30 μg/mL), while it appeared insensitive to the rest of the tested peptides. Furthermore, compounds 1, 3, and 5 exhibited a promising safety profile against human normal skin fibroblasts cell line BJ-1. In order to investigate the mode of action, compound 5 was selected as a representative example to study its in vitro effect against the apoptotic parameters and Bax/BCL-2/p53/caspase-7/caspase-3/tubulin, and DNA fragmentation to investigate beta (TUBb). Additionally, all the new analogues were subjected to antimicrobial assay against a panel of Gram-positive and Gram-negative bacteria and the yeast candida Albicans. All the tested GA analogues 1-8 exhibited more antibacterial effect against Micrococcus Luteus than gentamicin, but they exhibited moderate antimicrobial activity against the tested bacterial and yeast strains. Molecular docking studies were also simulated for compound 5 to give better rationalization and put insight to the features of its structure.
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Affiliation(s)
- Gaber O. Moustafa
- National Research Centre, Peptide Chemistry Department, Chemical Industries Research Division, Cairo 12622, Egypt;
| | - Ahmed Shalaby
- National Research Centre, Peptide Chemistry Department, Chemical Industries Research Division, Cairo 12622, Egypt;
| | - Ahmed M. Naglah
- National Research Centre, Peptide Chemistry Department, Chemical Industries Research Division, Cairo 12622, Egypt;
- Department of Pharmaceutical Chemistry, Drug Exploration and Development Chair (DEDC), College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia
| | - Marwa M. Mounier
- National Research Centre, Pharmacognosy Department, Pharmaceutical and Drug Industries Research Division, 33-El Bohouth St., Giza 12622, Egypt;
| | - Heba El-Sayed
- Botany and Microbiology Department, Faculty of Science, Helwan University, Helwan 11111, Egypt;
| | - Manal M. Anwar
- National Research Centre, Department of Therapeutic Chemistry, Cairo 12622, Egypt;
| | - Eman S. Nossier
- Department of Pharmaceutical Medicinal Chemistry and Drug Design, Faculty of Pharmacy (Girls), Al-Azhar University, Cairo 11754, Egypt;
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3
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Ma XY, Zhang M, Fang G, Cheng CJ, Wang MK, Han YM, Hou XT, Hao EW, Hou YY, Bai G. Ursolic acid reduces hepatocellular apoptosis and alleviates alcohol-induced liver injury via irreversible inhibition of CASP3 in vivo. Acta Pharmacol Sin 2021; 42:1101-1110. [PMID: 33028983 PMCID: PMC8209164 DOI: 10.1038/s41401-020-00534-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Accepted: 09/10/2020] [Indexed: 02/07/2023] Open
Abstract
Alcoholic liver disease (ALD) is one of the pathogenic factors of chronic liver disease with the highest clinical morbidity worldwide. Ursolic acid (UA), a pentacyclic terpenoid carboxylic acid, has shown many health benefits including antioxidative, anti-inflammatory, anticancer, and hepatoprotective activities. We previously found that UA was metabolized in vivo into epoxy-modified UA containing an epoxy electrophilic group and had the potential to react with nucleophilic groups. In this study we prepared an alkynyl-modified UA (AM-UA) probe for tracing and capturing the target protein of UA from liver in mice, then investigated the mode by which UA bound to its target in vivo. By conducting proteome identification and bioinformatics analysis, we identified caspase-3 (CASP3) as the primary target protein of UA associated with liver protection. Molecule docking analysis showed that the epoxy group of the UA metabolite reacted with Cys-163 of CASP3, forming a covalent bond with CASP3. The binding mode of the UA metabolites (UA, CM-UA, and EM-UA) was verified by biochemical evaluation, demonstrating that the epoxy group produced by metabolism played an important role in the inhibition of CASP3. In alcohol-treated HepG2 cells, pretreatment with the UA metabolite (10 μM) irreversibly inhibited CASP3 activities, and subsequently decreased the cleavage of PARP and cell apoptosis. Finally, pre-administration of UA (20-80 mg· kg-1 per day, ig, for 1 week) dose-dependently alleviated alcohol-induced liver injury in mice mainly via the inhibition of CASP3. In conclusion, this study demonstrates that UA is a valuable lead compound for the treatment of ALD.
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Affiliation(s)
- Xiao-Yao Ma
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China
| | - Man Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China
| | - Ge Fang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China
| | - Chuan-Jing Cheng
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China
| | - Mu-Kuo Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China
| | - Yi-Man Han
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China
| | - Xiao-Tao Hou
- Guangxi Collaborative Innovation Center for Functional Ingredients Study of Agricultural Residues, Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning, 530200, China
| | - Er-Wei Hao
- Guangxi Collaborative Innovation Center for Functional Ingredients Study of Agricultural Residues, Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning, 530200, China
| | - Yuan-Yuan Hou
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China.
| | - Gang Bai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300000, China
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4
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Anson F, Kanjilal P, Thayumanavan S, Hardy JA. Tracking exogenous intracellular casp-3 using split GFP. Protein Sci 2021; 30:366-380. [PMID: 33165988 PMCID: PMC7784757 DOI: 10.1002/pro.3992] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 09/28/2020] [Accepted: 11/03/2020] [Indexed: 11/08/2022]
Abstract
Cytosolic protein delivery promises diverse applications from therapeutics, to genetic modification and precision research tools. To achieve effective cellular and subcellular delivery, approaches that allow protein visualization and accurate localization with greater sensitivity are essential. Fluorescently tagging proteins allows detection, tracking and visualization in cellulo. However, undesired consequences from fluorophores or fluorescent protein tags, such as nonspecific interactions and high background or perturbation to native protein's size and structure, are frequently observed, or more troublingly, overlooked. Distinguishing cytosolically released molecules from those that are endosomally entrapped upon cellular uptake is particularly challenging and is often complicated by the inherent pH-sensitive and hydrophobic properties of the fluorophore. Monitoring localization is more complex in delivery of proteins with inherent protein-modifying activities like proteases, transacetylases, kinases, etc. Proteases are among the toughest cargos due to their inherent propensity for self-proteolysis. To implement a reliable, but functionally silent, tagging technology in a protease, we have developed a caspase-3 variant tagged with the 11th strand of GFP that retains both enzymatic activity and structural characteristics of wild-type caspase-3. Only in the presence of cytosolic GFP strands 1-10 will the tagged caspase-3 generate fluorescence to signal a non-endosomal location. This methodology facilitates easy screening of cytosolic vs. endosomally-entrapped proteins due to low probabilities for false positive results, and further, allows tracking of the resultant cargo's translocation. The development of this tagged casp-3 cytosolic reporter lays the foundation to probe caspase therapeutic properties, charge-property relationships governing successful escape, and the precise number of caspases required for apoptotic cell death.
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Affiliation(s)
- Francesca Anson
- Department of ChemistryUniversity of MassachusettsAmherstMassachusettsUSA
| | - Pintu Kanjilal
- Department of ChemistryUniversity of MassachusettsAmherstMassachusettsUSA
| | - S. Thayumanavan
- Department of ChemistryUniversity of MassachusettsAmherstMassachusettsUSA
- The Center for Bioactive Delivery at the Institute for Applied Life SciencesUniversity of MassachusettsAmherstMassachusettsUSA
| | - Jeanne A. Hardy
- Department of ChemistryUniversity of MassachusettsAmherstMassachusettsUSA
- The Center for Bioactive Delivery at the Institute for Applied Life SciencesUniversity of MassachusettsAmherstMassachusettsUSA
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5
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El-Sheref EM, Aly AA, Alshammari MB, Brown AB, Abdel-Hafez SMN, Abdelzaher WY, Bräse S, Abdelhafez EMN. Design, Synthesis, Molecular Docking, Antiapoptotic and Caspase-3 Inhibition of New 1,2,3-Triazole/ Bis-2(1 H)-Quinolinone Hybrids. Molecules 2020; 25:E5057. [PMID: 33143331 PMCID: PMC7672604 DOI: 10.3390/molecules25215057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 10/22/2020] [Accepted: 10/22/2020] [Indexed: 12/29/2022] Open
Abstract
A series of novel 1,2,3-triazoles hybridized with two quinolin-2-ones, was designed and synthesized through click reactions. The structures of the synthesized compounds were elucidated by NMR, IR, and mass spectra in addition to elemental analysis. The synthesized compounds were assessed for their antiapoptotic activity in testis, as testicular torsion is the main cause of male infertility. This effect was studied in light of decreasing tissue damage induced by I/R in the testis of rats using N-acetylcysteine (NAC) as an antiapoptotic reference. Compounds 6a-c were the most active antiapoptotic hybrids with significant measurements for malondialdehyde (MDA) and total antioxidant capacity (TAC) and the apoptotic biomarkers (testicular testosterone, TNFα, and caspase-3) in comparison to the reference. A preliminary mechanistic study was performed to improve the antiapoptotic activity through caspase-3 inhibition. A compound assigned as 6-methoxy-4-(4-(((2-oxo-1,2-dihydroquinolin-4-yl)oxy)methyl)-1H-1,2,3-triazol-1-yl)quinolin-2(1H)-one (6c) was selected as a representative of the most active hybrids in comparison to NAC. Assay of cytochrome C for 6c revealed an attenuation of cytochrome C level about 3.54 fold, comparable to NAC (4.13 fold). In caspases-3,8,9 assays, 6c was found to exhibit more potency and selectivity toward caspase-3 than other caspases. The testicular histopathological investigation was carried out on all targeted compounds 6a-g, indicating a significant improvement in the spermatogenesis process for compounds 6a-c if compared to the reference relative to the control. Finally, molecular docking studies were done at the caspase-3 active site to suggest possible binding modes. Hence, it could conceivably be hypothesized that compounds 6a-c could be considered good lead candidate compounds as antiapoptotic agents.
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Affiliation(s)
- Essmat M. El-Sheref
- Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt;
| | - Ashraf A. Aly
- Chemistry Department, Faculty of Science, Minia University, El-Minia 61519, Egypt;
| | - Mohammed B. Alshammari
- College of Sciences and Humanities, Prince Sattam bin Abdulaziz University, Alkharj 11942, Saudi Arabia;
| | - Alan B. Brown
- Florida Institute of Technology, 150 W University Blvd, Melbourne, FL 32901, USA;
| | | | | | - Stefan Bräse
- Institute of Organic Chemistry, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
- Institute of Biological and Chemical Systems (IBCS-FMS), Karlsruhe Institute of Technology, 76344 Eggenstein-Leopoldshafen, Germany
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6
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Öhlknecht C, Petrov D, Engele P, Kröß C, Sprenger B, Fischer A, Lingg N, Schneider R, Oostenbrink C. Enhancing the promiscuity of a member of the Caspase protease family by rational design. Proteins 2020; 88:1303-1318. [PMID: 32432825 PMCID: PMC7497161 DOI: 10.1002/prot.25950] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 03/19/2020] [Accepted: 04/29/2020] [Indexed: 12/12/2022]
Abstract
The N-terminal cleavage of fusion tags to restore the native N-terminus of recombinant proteins is a challenging task and up to today, protocols need to be optimized for different proteins individually. Within this work, we present a novel protease that was designed in-silico to yield enhanced promiscuity toward different N-terminal amino acids. Two mutations in the active-site amino acids of human Caspase-2 were determined to increase the recognition of branched amino-acids, which show only poor binding capabilities in the unmutated protease. These mutations were determined by sequential and structural comparisons of Caspase-2 and Caspase-3 and their effect was additionally predicted using free-energy calculations. The two mutants proposed in the in-silico studies were expressed and in-vitro experiments confirmed the simulation results. Both mutants showed not only enhanced activities toward branched amino acids, but also smaller, unbranched amino acids. We believe that the created mutants constitute an important step toward generalized procedures to restore original N-termini of recombinant fusion proteins.
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Affiliation(s)
- Christoph Öhlknecht
- Institute of Molecular Modeling and SimulationUniversity of Natural Resources and Life SciencesViennaAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Drazen Petrov
- Institute of Molecular Modeling and SimulationUniversity of Natural Resources and Life SciencesViennaAustria
| | - Petra Engele
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Christina Kröß
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Bernhard Sprenger
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | | | - Nico Lingg
- Austrian Centre of Industrial BiotechnologyViennaAustria
| | - Rainer Schneider
- Institute of Biochemistry and Center of Molecular Biosciences InnsbruckUniversity of InnsbruckInnsbruckAustria
| | - Chris Oostenbrink
- Institute of Molecular Modeling and SimulationUniversity of Natural Resources and Life SciencesViennaAustria
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7
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Fu QQ, Liu R, Zhang W, Ben A, Wang R. In Vitro Susceptibility of Oxidized Myosin by μ-Calpain or Caspase-3 and the Determination of the Oxidation Sites of Myosin Heavy Chains. J Agric Food Chem 2020; 68:8629-8636. [PMID: 32678614 DOI: 10.1021/acs.jafc.0c01065] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The effect of susceptibility to in vitro oxidation on the degradation of myosin isolated from beef muscles via μ-calpain or caspase-3 was examined, and the measurement of the oxidation sites of myosin heavy chains was performed. Myosin was incubated with hydroxyl free radical-generating systems, which were composed of 0.01 M FeCl3, 0.1 M ascorbic acid, and 0, 25, 50, and 100 μM H2O2 at 37 °C for 20 min. The oxidized myosin then reacted with μ-calpain or caspase-3 at 37 °C for 30 min, respectively. The results showed that protein oxidation systems in vitro resulted in different levels of myosin oxidation, leading to significant changes in the secondary structure of myosin (P < 0.05). The sodium dodecyl dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and Western blotting results showed that in vitro oxidation promoted myosin degradation via μ-calpain or caspase-3. Proteomics research suggested that the number of myosin oxidation sites increased constantly with the increase of oxidation levels. Oxidation sites of myosin were mainly cysteine, methionine, arginine, histidine, tyrosine, lysine, and asparagine. These results indicated that oxidation using H2O2 in the range of 0-100 μM could increase the degradation of myosin via μ-calpain and caspase-3 due to increased exposure of the oxidation sites of myosin.
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Affiliation(s)
- Qing-Quan Fu
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, Jiangsu, China
| | - Rui Liu
- College of Food Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China
| | - Wangang Zhang
- Key Laboratory of Meat Processing and Quality Control, MOE, Key Laboratory of Meat Processing, MOA, Jiangsu Synergetic Innovation Center of Meat Processing and Quality Control, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Ailing Ben
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, Jiangsu, China
| | - Rongrong Wang
- School of Food Science, Nanjing Xiaozhuang University, Nanjing 211171, Jiangsu, China
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8
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Pan RR, Zhang CY, Li Y, Zhang BB, Zhao L, Ye Y, Song YN, Zhang M, Tie HY, Zhang H, Zhu JY. Daphnane Diterpenoids from Daphne genkwa Inhibit PI3K/Akt/mTOR Signaling and Induce Cell Cycle Arrest and Apoptosis in Human Colon Cancer Cells. J Nat Prod 2020; 83:1238-1248. [PMID: 32223193 DOI: 10.1021/acs.jnatprod.0c00003] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Seven new daphnane-type diterpenoids, daphgenkins A-G (1-7), and 15 known analogues (8-22) were isolated from the flower buds of Daphne genkwa. Their structures and absolute configurations were elucidated by spectroscopic data and calculated ECD analyses. The cytotoxicities of all daphnane-type diterpenoids (1-22) obtained were evaluated against three human colon cancer cell lines (SW620, RKO, and LoVo). Compounds 1, 12, and 13 exhibited cytotoxic effects against the SW620 and RKO cell lines, with IC50 values in the range of 3.0-9.7 μM. The most active new compound, 1, with an IC50 value of 3.0 μM against SW620 cells, was evaluated further for its underlying molecular mechanism. Compound 1 induced G0/G1 cell cycle arrest, leading to the induction of apoptosis in SW620 cells. Also, it induced cancer cell apoptosis by an increased ratio of Bax/Bcl-2, activated cleaved caspase-3 and caspase-9, and upregulated PARP. Finally, compound 1 significantly inhibited PI3K/Akt/mTOR signaling in SW620 cells. Together, the results suggest that compound 1 may be a suitable lead compound for further biological evaluation.
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Affiliation(s)
- Rong-Rong Pan
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Chun-Yan Zhang
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Yuan Li
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Bing-Bing Zhang
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Liang Zhao
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Ying Ye
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Ya-Nan Song
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Miao Zhang
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Hong-Yun Tie
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
| | - Hong Zhang
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, People's Republic of China
| | - Jian-Yong Zhu
- Central Laboratory, Seventh People's Hospital of Shanghai University of Traditional Chinese Medicine, Shanghai 200137, People's Republic of China
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9
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Stallinger A, Kretschmer N, Kleinegger F, Brvar L, Liegl-Atzwanger B, Prokesch A, Durchschein C, Bauer R, Deutsch A, Rinner B. β,β-Dimethylacrylshikonin Induces Apoptosis in Melanoma Cell Lines by NOXA Upregulation. J Nat Prod 2020; 83:305-315. [PMID: 31961147 DOI: 10.1021/acs.jnatprod.9b00719] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Melanoma is the most aggressive form of skin cancer, with high metastasis rates and poor prognosis. Survival rates and possible therapies depend on the state of the tumor and its mutational profile. BRAF and NRAS are the most frequent driver mutations. Currently, there is no efficient therapy for NRAS-mutated or late-stage melanoma. In this study, the therapeutic potential of β,β-dimethylacrylshikonin (DMAS) was investigated on melanoma. The influence of DMAS was determined in five different melanoma cell lines with different mutational profiles. The effects of this compound on cell viability, apoptosis, and gene and protein expression were examined. The results obtained were validated in vivo. DMAS significantly reduced the viability of several melanoma cell lines in a concentration- and time-dependent manner. Furthermore, DMAS induced caspase-3-dependent apoptosis via NOXA upregulation, as confirmed by NOXA knockdown experiments. This is the first time that NOXA-dependent apoptosis was shown with respect to a shikonin derivative and melanoma. Additionally, tumor regression and necrosis under DMAS treatment were demonstrated in vivo. Importantly, BRAF as well as NRAS-mutated metastatic human melanoma cell lines were treated successfully in vitro and in vivo. Taken together, DMAS showed promising results and is worthy of further study.
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Affiliation(s)
- Alexander Stallinger
- Division of Biomedical Research , Medical University of Graz , 8036 Graz , Austria
| | - Nadine Kretschmer
- Division of Biomedical Research , Medical University of Graz , 8036 Graz , Austria
- Institute of Pharmaceutical Sciences, Department of Pharmacognosy , University of Graz , 8010 Graz , Austria
| | - Florian Kleinegger
- Diagnostic and Research Institute of Pathology , Medical University of Graz , 8010 Graz , Austria
| | - Luka Brvar
- Division of Biomedical Research , Medical University of Graz , 8036 Graz , Austria
| | | | - Andreas Prokesch
- Gottfried Schatz Research Center for Cell Signaling, Metabolism & Aging , Medical University of Graz , 8010 Graz , Austria
- Division of Cell Biology, Histology and Embryology , Medical University of Graz , 8010 Graz , Austria
| | - Christin Durchschein
- Institute of Pharmaceutical Sciences, Department of Pharmacognosy , University of Graz , 8010 Graz , Austria
| | - Rudolf Bauer
- Institute of Pharmaceutical Sciences, Department of Pharmacognosy , University of Graz , 8010 Graz , Austria
| | - Alexander Deutsch
- Division of Hematology, Medical University of Graz , 8036 Graz , Austria
| | - Beate Rinner
- Division of Biomedical Research , Medical University of Graz , 8036 Graz , Austria
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10
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Cancela S, Canclini L, Mourglia-Ettlin G, Hernández P, Merlino A. Neuroprotective effects of novel nitrones: In vitro and in silico studies. Eur J Pharmacol 2020; 871:172926. [PMID: 31958456 DOI: 10.1016/j.ejphar.2020.172926] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 11/19/2022]
Abstract
Neurodegenerative diseases affect millions of people around the world. Several studies point out caspase-3 as a key player in the development and progression of neurological disorders including amyotrophic lateral sclerosis, Alzheimer's, Parkinson's and Huntington's diseases. Furthermore, oxidative stress and mitochondrial dysfunction plays an important role in neurodegenerative pathologies leading to neuronal damage and cell death. Pharmacological properties of nitrones such as free radical trapping and neuroprotection has been previously described. In the present work, we have assessed ten non-cytotoxic nitrones for their ability to inhibit apoptosis plus their potential to reduce active caspase-3 and oxidative stress in the hippocampal neuronal cell line HT22. Our results highlight the faculty of nitrones to inhibit apoptosis by a mechanism that involves active caspase-3 reduction and decrease of reactive oxygen species. Moreover, docking and molecular dynamics approaches lead to a detailed analysis at the atomic level of the nitrones binding mode to caspase-3 suggesting that compounds bind in a region close to the catalytic site. All these data place these molecules as excellent hits for further efforts to redesign novel compounds in the search of a new therapy against neurodegenerative disorders.
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Affiliation(s)
- Saira Cancela
- Laboratorio de Epigenética e Inestabilidad Genómica, Departamento de Genética, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay.
| | - Lucía Canclini
- Departamento de Genética, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
| | - Gustavo Mourglia-Ettlin
- Cátedra de Inmunología, Departamento de Biociencias, Facultad de Química, Universidad de la República, Montevideo, Uruguay
| | - Paola Hernández
- Laboratorio de Epigenética e Inestabilidad Genómica, Departamento de Genética, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay.
| | - Alicia Merlino
- Instituto de Química Biológica, Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay
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11
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Glaser M, Rajkumar V, Diocou S, Gendron T, Yan R, Sin PKB, Sander K, Carroll L, Pedley RB, Aboagye EO, Witney TH, Årstad E. One-Pot Radiosynthesis and Biological Evaluation of a Caspase-3 Selective 5-[ 123,125I]iodo-1,2,3-triazole derived Isatin SPECT Tracer. Sci Rep 2019; 9:19299. [PMID: 31848442 PMCID: PMC6917698 DOI: 10.1038/s41598-019-55992-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 11/26/2019] [Indexed: 11/08/2022] Open
Abstract
Induction of apoptosis is often necessary for successful cancer therapy, and the non-invasive monitoring of apoptosis post-therapy could assist in clinical decision making. Isatins are a class of compounds that target activated caspase-3 during apoptosis. Here we report the synthesis of the 5-iodo-1,2,3-triazole (FITI) analog of the PET tracer [18F]ICMT11 as a candidate tracer for imaging of apoptosis with SPECT, as well as PET. Labelling with radioiodine (123,125I) was achieved in 55 ± 12% radiochemical yield through a chelator-accelerated one-pot cycloaddition reaction mediated by copper(I) catalysis. The caspase-3 binding affinity and selectivity of FITI compares favourably to that of [18F]ICMT11 (Ki = 6.1 ± 0.9 nM and 12.4 ± 4.7 nM, respectively). In biodistribution studies, etoposide-induced cell death in a SW1222 xenograft model resulted in a 2-fold increase in tumour uptake of the tracer. However, the tumour uptake was too low to allow in vivo imaging of apoptosis with SPECT.
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Affiliation(s)
- Matthias Glaser
- Centre for Radiopharmaceutical Chemistry, University College London, 5 Gower Place, London, WC1E 6BS, United Kingdom
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | | | - Seckou Diocou
- UCL, Cancer Institute, 72 Huntley Street, London, WC1E 6DD, UK
| | - Thibault Gendron
- Centre for Radiopharmaceutical Chemistry, University College London, 5 Gower Place, London, WC1E 6BS, United Kingdom
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | - Ran Yan
- King's College London, School of Biomedical Engineering and Imaging Sciences, St. Thomas' Hospital, SE1 7EH, London, United Kingdom
| | - Pak Kwan Brian Sin
- Centre for Radiopharmaceutical Chemistry, University College London, 5 Gower Place, London, WC1E 6BS, United Kingdom
| | - Kerstin Sander
- Centre for Radiopharmaceutical Chemistry, University College London, 5 Gower Place, London, WC1E 6BS, United Kingdom
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
| | - Laurence Carroll
- Imperial College London, Science, Technology & Medicine, Department of Medicine, Hammersmith Hospital, DuCane Road, London, W12 0NN, United Kingdom
| | | | - Eric O Aboagye
- Imperial College London, Science, Technology & Medicine, Department of Medicine, Hammersmith Hospital, DuCane Road, London, W12 0NN, United Kingdom
| | - Timothy H Witney
- King's College London, School of Biomedical Engineering and Imaging Sciences, St. Thomas' Hospital, SE1 7EH, London, United Kingdom
- Centre for Advanced Biomedical Imaging, Division of Medicine, University College London, London, United Kingdom
| | - Erik Årstad
- Centre for Radiopharmaceutical Chemistry, University College London, 5 Gower Place, London, WC1E 6BS, United Kingdom.
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom.
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12
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Chen YL, Han K, Huang X, Zhang Z, Wan X, Ren Q. Caspase-3C gene from red swamp crayfish, Procambarus clarki: Characterization and expression in response to pathogenic infection. Fish Shellfish Immunol 2019; 94:792-799. [PMID: 31585244 DOI: 10.1016/j.fsi.2019.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/28/2019] [Accepted: 10/01/2019] [Indexed: 06/10/2023]
Abstract
The caspase is an essential module in the Drosophila immune deficiency (IMD) pathway, which plays a crucial role in countering pathogen infection. In this study, a gene named PcCaspase-3C was found in Procambarus clarkia with a full-length of 4684 bp, including a 1572 bp opening reading frame, which encoded a putative protein of 523 amino acids. PcCaspase-3C contained a CASc domain constituted of 237 amino acids. The PcCaspase-3C gene was primarily expressed in heart, stomach, and intestine, while less in gonad, hepatopancreas, gills, and hemocytes, with the least expression in muscle. Infection with Staphyloccocus aureus, Vibrio parahaemolyticus or white spot syndrome virus (WSSV) induced an up-regulated expression of PcCaspase-3C in intestine or stomach to varying degrees. When PcCaspase-3C was silenced by double-stranded RNA, the expression of some antimicrobial peptides such as ALF2, ALF5, ALF6, Cru3, Cru4, and Lys was significantly inhibited. In addition, silencing of PcCaspase-3C accelerated infection with WSSV in vivo. According to these results, we suggest that PcCaspase-3C might play a crucial role in the immune response of P. clarkia against pathogenic bacterial and viral infections.
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Affiliation(s)
- Yu-Lei Chen
- College of Food and Biological Engineering, Jimei University, Xiamen, Fujian Province, 361021, China
| | - Keke Han
- College of Marine Science and Engineering, Nanjing Normal University, Nanjing, China
| | - Xin Huang
- College of Marine Science and Engineering, Nanjing Normal University, Nanjing, China
| | - Zhuoxing Zhang
- College of Marine Science and Engineering, Nanjing Normal University, Nanjing, China
| | - Xihe Wan
- Institute of Oceanology and Marine Fisheries, Jiangsu, PR China.
| | - Qian Ren
- Shandong Provincial Key Laboratory of Animal Resistance Biology, College of Life Sciences, Shandong Normal University, Jinan, 250014, PR China; Co-Innovation Center for Marine Bio-Industry Technology of Jiangsu Province, Lianyungang, Jiangsu Province, 222005, China; College of Marine Science and Engineering, Nanjing Normal University, Nanjing, China.
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13
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Ling Y, Li Y, Zhu R, Qian J, Liu J, Gao W, Meng C, Miao J, Xiong B, Qiu X, Ling C, Dai H, Zhang Y. Hydroxamic Acid Derivatives of β-Carboline/Hydroxycinnamic Acid Hybrids Inducing Apoptosis and Autophagy through the PI3K/Akt/mTOR Pathways. J Nat Prod 2019; 82:1442-1450. [PMID: 31120744 DOI: 10.1021/acs.jnatprod.8b00843] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Naturally occurring β-carbolines are known to have antitumor activities but with limited effectiveness. In order to improve their efficacy, a series of new hydroxamic-acid-containing β-carbolines connected via a hydroxycinnamic acid moitey (12a-f) were developed to incorporate histone deacetylase (HDAC) inhibition for possible synergistic effects. When evaluated in in vitro assays, most of the analogues showed significant antitumor activities against four human cancer cells. In particular, 12b showed the highest cytotoxic potency of the series, including drug-resistant Bel7402 cells, but had minimal effect on normal hepatic LO2 cells. These compounds also showed excellent inhibitory effects against HDAC1/6, which appear to contribute greatly to their antiproliferative properties. Compound 12b enhanced the acetylation levels of histone H3 and α-tubulin and induced greater cancer cell apoptosis than the FDA-approved HDAC inhibitor SAHA by regulating expression of apoptotic proteins Bax, Bcl-2, and caspase 3. Importantly, 12b also induced a significant amount of autophagic flux activity in Bel7402 cells by increasing the expression of Beclin-1 and LC3-II proteins and decreasing that of LC3-I and p62. Finally, 12b significantly inhibited PI3K/Akt/mTOR signaling, an important cell-growth-promoting pathway aberrantly activated in many cancers. Together, the results suggest that these hydroxamic-acid-containing β-carboline derivatives may be new leads for the discovery of agents for the treatment of human carcinoma cancers.
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Affiliation(s)
- Yong Ling
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
- The Affiliated Hospital of Nantong University , Nantong University , Nantong 226001 , People's Republic of China
| | - Yangyang Li
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
- The Affiliated Hospital of Nantong University , Nantong University , Nantong 226001 , People's Republic of China
| | - Rui Zhu
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
| | - Jianqiang Qian
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
| | - Ji Liu
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
- The Affiliated Hospital of Nantong University , Nantong University , Nantong 226001 , People's Republic of China
| | - Weijie Gao
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
| | - Chi Meng
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
| | - Jiefei Miao
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
- The Affiliated Hospital of Nantong University , Nantong University , Nantong 226001 , People's Republic of China
| | - Biao Xiong
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
| | - Xiaodong Qiu
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
| | - Changchun Ling
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
- The Affiliated Hospital of Nantong University , Nantong University , Nantong 226001 , People's Republic of China
| | - Hong Dai
- College of Chemistry and Chemical Engineering , Nantong University , Nantong 226019 , People's Republic of China
| | - Yanan Zhang
- School of Pharmacy and Jiangsu Province Key Laboratory for Inflammation and Molecular Drug Target , Nantong University , Nantong 226001 , People's Republic of China
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14
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Abstract
The engineering of enzymes for the purpose of controlling their activity represents a valuable approach to address challenges in both fundamental and applied research. Here, we describe and compare different design strategies for the generation of a human rhinovirus-14 (HRV14) 3C protease-inducible caspase-3 (CASP3). We exemplify the application potential of the resulting protease by controlling the activity of a synthetic enzyme cascade, which represents an important motif for the design of artificial signal transduction networks. In addition, we use our engineered CASP3 to characterize the effect of aspartate mutations on enzymatic activity. Besides the identification of mutations that render the enzyme inactive, we find the CASP3-D192E mutant (aspartate-to-glutamate exchange at position 192) to be inaccessible for 3C protease-mediated cleavage. This indicates a structural change of CASP3 that goes beyond a slight misalignment of the catalytic triad. This study could inspire the design of additional engineered proteases that could be used to unravel fundamental research questions or to expand the collection of biological parts for the design of synthetic signaling pathways.
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Affiliation(s)
- Hanna J Wagner
- Faculty of Biology, University of Freiburg, Schänzlestraße 18, 79104 Freiburg, Germany.
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104 Freiburg, Germany.
| | - Wilfried Weber
- Faculty of Biology, University of Freiburg, Schänzlestraße 18, 79104 Freiburg, Germany.
- Signalling Research Centres BIOSS and CIBSS, University of Freiburg, Schänzlestraße 18, 79104 Freiburg, Germany.
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15
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Abdel-Magied N, Shedid SM, Ahmed AG. Mitigating effect of biotin against irradiation-induced cerebral cortical and hippocampal damage in the rat brain tissue. Environ Sci Pollut Res Int 2019; 26:13441-13452. [PMID: 30911963 DOI: 10.1007/s11356-019-04806-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
Radiation-induced brain injury is common and mainly occurs in patients receiving radiotherapy for malignant head and neck tumors. The brain is oversensitive to oxidant injury induced by radiation. Biotin is a member of the vitamin B complex family and its deficiency has been associated with neurogenesis impairment in animals and humans. The present study was undertaken to investigate the mitigating effect of biotin on the cerebral cortical and hippocampal damage induced by radiation exposure. Animals were exposed to radiation in the presence or absence of biotin and sacrificed on day 10. The results demonstrated that the administration of biotin 2 mg to irradiated rats had no significant effect on the radiation-induced damage of the cerebral cortex and the hippocampus, while the administration of biotin 6 mg has significantly attenuated oxidative stress in the hippocampus, manifested by a reduction of 4-hydroxynonenal (4HNE), total nitrate/nitrite (NOx), and xanthine oxidase (XO) levels associated with an elevation of glutathione (GSH) content as well as superoxide dismutase (SOD) and catalase (CAT) activities. In addition, biotin decreased the pro-inflammatory cytokines (interleukin-1 beta (IL-1β), interleukin-6 (IL-6), and tumor necrotic factor alpha (TNF-α)), caspase-3, poly(ADP-ribose) polymerase 1 (PARP1) level, and PARP1 gene expression. Moreover, biotin 6 mg treatment diminished serum S100 protein (S100B) and neuron-specific enolase (NSE) levels. In conclusion, biotin treatment at high dose post-irradiation has efficiently neutralized the effect of free radicals in the hippocampal region of rats. Thus, it could be applicable as a radio-mitigator for reducing or delayed radiation-induced brain injury in patients post-radiotherapy.
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Affiliation(s)
- Nadia Abdel-Magied
- Radiation Biology Research Department, National Centre for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), 3 street (3st) Ahmed Elzomer, P.O. Box 29, Nasr City, Cairo, Egypt.
| | - Shereen M Shedid
- Radiation Biology Research Department, National Centre for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), 3 street (3st) Ahmed Elzomer, P.O. Box 29, Nasr City, Cairo, Egypt
| | - Amal G Ahmed
- Radiation Biology Research Department, National Centre for Radiation Research and Technology (NCRRT), Atomic Energy Authority (AEA), 3 street (3st) Ahmed Elzomer, P.O. Box 29, Nasr City, Cairo, Egypt
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16
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Zeweil MM, Sadek KM, Taha NM, El-Sayed Y, Menshawy S. Graviola attenuates DMBA-induced breast cancer possibly through augmenting apoptosis and antioxidant pathway and downregulating estrogen receptors. Environ Sci Pollut Res Int 2019; 26:15209-15217. [PMID: 30924043 DOI: 10.1007/s11356-019-04920-w] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 03/20/2019] [Indexed: 06/09/2023]
Abstract
Breast cancer is a global public health problem where it is the second most prevalent cancer. Historical cancer treatment with graviola has been reported. This study aimed to investigate the protective effects of graviola on 7,12-dimethylbenz[a]anthracene (DMBA)-induced rat breast cancer. Fifty female Wistar rats were allocated into four groups: control group (gastro-gavaged by sesame oil), DMBA-treated group (gastro-gavaged a single dose of DMBA [50 mg/kg body mass, diluted in 1 ml sesame oil]) at the age 57 days, DMBA+G37-treated group (gastro-gavaged a single dose of DMBA [50 mg/kg body mass, diluted in 1 ml sesame oil]) at the age of 57 days plus graviola (200 mg/kg body mass) two times weekly (p.o.) at the age of 37 days till the end of the experiment, and DMBA+G57-treated group (received a single dose of DMBA [50 mg/kg body mass, diluted in 1 ml sesame oil]) plus graviola (200 mg/kg body mass) two times weekly at the age of 57 days until the end of the experiment. After the 30-week experimental period, blood samples were collected. Then, animals were sacrificed to determine the apoptotic indices, antioxidant status, and mammary gland tumor marker (CA 15-3). The DMBA upregulated the expression of one of the main anti-apoptotic genes: B-cell lymphoma protein 2 (BCL2) and estrogen receptor alpha (ER-α) gene. Moreover, it significantly increased breast lipid peroxidation and serum CA 15-3 but decreased breast antioxidant enzymatic activities (glutathione peroxidase, glutathione S-transferase, catalase, and superoxide dismutase). Nevertheless, administration of DMBA and graviola especially DMBA+G37 induced apoptosis through at least 1.5-fold in gene expression levels of pro-apoptotic genes: BCL2-associated X protein (BAX), tumor suppressor gene (P53), and cysteinyl-aspartic acid-protease-3 (caspase-3). A critical role of P53 in the regulation of the BCL2 and BAX has been reported. These proteins can determine if the cell undergoes apoptosis or cancels the process. Once the BAX gene activates caspase-3, there is no irreversible way toward cell death. Also, graviola ameliorated the DMBA effects on antioxidant enzymatic activities and tumor marker CA 15-3. This study concludes that graviola ameliorated DMBA-induced breast cancer potentially through upregulating apoptotic genes, downregulating the ER-α gene, increasing antioxidants, and decreasing lipid peroxidation levels.
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Affiliation(s)
- Mohamed M Zeweil
- Faculty of Veterinary Medicine, Department of Biochemistry, Damanhour University, Damanhour, Egypt
| | - Kadry M Sadek
- Faculty of Veterinary Medicine, Department of Biochemistry, Damanhour University, Damanhour, Egypt.
| | - Nabil M Taha
- Faculty of Veterinary Medicine, Department of Biochemistry, Alexandria University, Alexandria, Egypt
| | - Yasser El-Sayed
- Faculty of Veterinary Medicine, Department of Forensic Medicine and Toxicology, Damanhour University, Damanhur, Egypt
| | - Sherif Menshawy
- Faculty of Veterinary Medicine, Department of Genetics, Damanhour University, Damanhour, Egypt
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17
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Van Kersavond T, Konopatzki R, Chakrabarty S, Blank-Landeshammer B, Sickmann A, Verhelst SHL. Short Peptides with Uncleavable Peptide Bond Mimetics as Photoactivatable Caspase-3 Inhibitors. Molecules 2019; 24:E206. [PMID: 30626051 PMCID: PMC6337261 DOI: 10.3390/molecules24010206] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 12/28/2018] [Accepted: 01/03/2019] [Indexed: 12/31/2022] Open
Abstract
Chemical probes that covalently interact with proteases have found increasing use for the study of protease function and localization. The design and synthesis of such probes is still a bottleneck, as the strategies to target different families are highly diverse. We set out to design and synthesize chemical probes based on protease substrate specificity with inclusion of an uncleavable peptide bond mimic and a photocrosslinker for covalent modification of the protease target. With caspase-3 as a model target protease, we designed reduced amide and triazolo peptides as substrate mimetics, whose sequences can be conveniently constructed by modified solid phase peptide synthesis. We found that these probes inhibited the caspase-3 activity, but did not form a covalent bond. It turned out that the reduced amide mimics, upon irradiation with a benzophenone as photosensitizer, are oxidized and form low concentrations of peptide aldehydes, which then act as inhibitors of caspase-3. This type of photoactivation may be utilized in future photopharmacology experiments to form protease inhibitors at a precise time and location.
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Affiliation(s)
- Tim Van Kersavond
- Leibniz-Institut für Analytische Wissenschaften ISAS, Otto-Hahn-Str. 6b, 44227 Dortmund, Germany.
| | - Raphael Konopatzki
- Leibniz-Institut für Analytische Wissenschaften ISAS, Otto-Hahn-Str. 6b, 44227 Dortmund, Germany.
| | - Suravi Chakrabarty
- Department of Cellular and Molecular Medicine, Laboratory of Chemical Biology, KU Leuven-University of Leuven, Herestraat 49 Box 802, 3000 Leuven, Belgium.
| | | | - Albert Sickmann
- Leibniz-Institut für Analytische Wissenschaften ISAS, Otto-Hahn-Str. 6b, 44227 Dortmund, Germany.
| | - Steven H L Verhelst
- Leibniz-Institut für Analytische Wissenschaften ISAS, Otto-Hahn-Str. 6b, 44227 Dortmund, Germany.
- Department of Cellular and Molecular Medicine, Laboratory of Chemical Biology, KU Leuven-University of Leuven, Herestraat 49 Box 802, 3000 Leuven, Belgium.
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18
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Clark AM, Ponniah K, Warden MS, Raitt EM, Yawn AC, Pascal SM. pH-Induced Folding of the Caspase-Cleaved Par-4 Tumor Suppressor: Evidence of Structure Outside of the Coiled Coil Domain. Biomolecules 2018; 8:biom8040162. [PMID: 30518159 PMCID: PMC6316887 DOI: 10.3390/biom8040162] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 11/20/2018] [Accepted: 11/22/2018] [Indexed: 12/13/2022] Open
Abstract
Prostate apoptosis response-4 (Par-4) is a 38 kDa largely intrinsically disordered tumor suppressor protein that functions in cancer cell apoptosis. Par-4 down-regulation is often observed in cancer while up-regulation is characteristic of neurodegenerative conditions such as Alzheimer’s disease. Cleavage of Par-4 by caspase-3 activates tumor suppression via formation of an approximately 25 kDa fragment (cl-Par-4) that enters the nucleus and inhibits Bcl-2 and NF-ƙB, which function in pro-survival pathways. Here, we have investigated the structure of cl-Par-4 using biophysical techniques including circular dichroism (CD) spectroscopy, dynamic light scattering (DLS), and intrinsic tyrosine fluorescence. The results demonstrate pH-dependent folding of cl-Par-4, with high disorder and aggregation at neutral pH, but a largely folded, non-aggregated conformation at acidic pH.
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Affiliation(s)
- Andrea M Clark
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA.
| | - Komala Ponniah
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA.
| | - Meghan S Warden
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA.
| | - Emily M Raitt
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA.
| | - Andrea C Yawn
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA.
| | - Steven M Pascal
- Department of Chemistry and Biochemistry, Old Dominion University, Norfolk, VA 23529, USA.
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19
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Kim KR, Hwang D, Kim J, Lee CY, Lee W, Yoon DS, Shin D, Min SJ, Kwon IC, Chung HS, Ahn DR. Streptavidin-mirror DNA tetrahedron hybrid as a platform for intracellular and tumor delivery of enzymes. J Control Release 2018; 280:1-10. [PMID: 29723615 DOI: 10.1016/j.jconrel.2018.04.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 03/29/2018] [Accepted: 04/29/2018] [Indexed: 11/17/2022]
Abstract
Despite the extremely high substrate specificity and catalytically amplified activity of enzymes, the lack of efficient cellular internalization limits their application as therapeutics. To overcome this limitation and to harness enzymes as practical biologics for targeting intracellular functions, we developed the streptavidin-mirror DNA tetrahedron hybrid as a platform for intracellular delivery of various enzymes. The hybrid consists of streptavidin, which provides a stoichiometrically controlled loading site for the enzyme cargo and an L-DNA (mirror DNA) tetrahedron, which provides the intracellular delivery potential. Due to the cell-penetrating ability of the mirror DNA tetrahedron of this hybrid, enzymes loaded on streptavidin can be efficiently delivered into the cells, intracellularly expressing their activity. In addition, we demonstrate tumor delivery of enzymes in an animal model by utilizing the potential of the hybrid to accumulate in tumors. Strikingly, the hybrid is able to transfer the apoptotic enzyme specifically into tumor cells, leading to strong suppression of tumor growth without causing significant damage to other tissues. These results suggest that the hybrid may allow anti-proliferative enzymes and proteins to be utilized as anticancer drugs.
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Affiliation(s)
- Kyoung-Ran Kim
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Dohyeon Hwang
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Juhyeon Kim
- Center for Neuro-Medicine, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Chang-Yong Lee
- College of Pharmacy, Gachon University, 191 Hambakmoe-ro, Incheon 21936, Republic of Korea
| | - Wonseok Lee
- Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea
| | - Dae Sung Yoon
- School of Biomedical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Dongyun Shin
- College of Pharmacy, Gachon University, 191 Hambakmoe-ro, Incheon 21936, Republic of Korea
| | - Sun-Joon Min
- Department of Chemical & Molecular Engineering/Applied Chemistry, Hanyang University, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Ick Chan Kwon
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Hak Suk Chung
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Division of Biomedical Science and Technology, Korea University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Dae-Ro Ahn
- Center for Theragnosis, Biomedical Research Institute, Korea Institute of Science and Technology (KIST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea; Division of Biomedical Science and Technology, Korea University of Science and Technology (UST), Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Republic of Korea.
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20
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Ma X, Zhang Y, Wang Z, Shen Y, Zhang M, Nie Q, Hou Y, Bai G. Ursolic Acid, a Natural Nutraceutical Agent, Targets Caspase3 and Alleviates Inflammation-Associated Downstream Signal Transduction. Mol Nutr Food Res 2017; 61:1700332. [PMID: 28801966 PMCID: PMC5765441 DOI: 10.1002/mnfr.201700332] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2017] [Revised: 08/03/2017] [Indexed: 12/14/2022]
Abstract
SCOPE Ursolic acid (UA) is a pentacyclicterpenoid carboxylic acid that is present in a wide variety of plant foods. There are many beneficial health effects that are attributed to the properties of UA. However, the specific cellular targets of UA and the mechanism underlying downstream signal transduction processes linked to the anti-inflammation pathway have not been thoroughly elucidated to date. METHODS AND RESULTS Chemical biology strategies such as target fishing, click reaction synthesis of a UA probe and molecular imaging were used to identify potential target proteins of UA. Cysteinyl aspartate specific proteinase 3 (CASP3) and its downstream signaling pathway were verified as potential targets by molecular docking, intracellular enzyme activity evaluation and accurate pathway analysis. The results indicated that UA acted on CASP3, ERK1 and JNK2 targets, alleviated inflammation-associated downstream multiple signal transduction factors, including ERK1, NF-κB and STAT3, and exhibited anti-inflammation activities. CONCLUSION As a natural dietary supplement, UA demonstrated anti-inflammation activity via inhibition of CASP3 and shows the potential to improve the therapy effect of several inflammation-associated diseases.
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Affiliation(s)
- Xiaoyao Ma
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
| | - Yuan Zhang
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
| | - Zengyong Wang
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
| | - Yunbing Shen
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
| | - Man Zhang
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
| | - Quandeng Nie
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
| | - Yuanyuan Hou
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
| | - Gang Bai
- State Key Laboratory of Medicinal Chemical BiologyCollege of Pharmacy and Tianjin Key Laboratory of Molecular Drug ResearchNankai UniversityTianjinChina
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21
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Ren X, Yu X, Gao B, Liu P, Li J. Characterization of three caspases and their pathogen-induced expression pattern in Portunus trituberculatus. Fish Shellfish Immunol 2017; 66:189-197. [PMID: 28478258 DOI: 10.1016/j.fsi.2017.05.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 04/21/2017] [Accepted: 05/01/2017] [Indexed: 06/07/2023]
Abstract
Caspases are a family of proteases involved in many important biological processes including apoptosis and inflammation. In this study, we analyzed the expression patterns and effects on immune response in various tissues of the edible crab Portunus trituberculatus. PtCas 2, PtCas 3 and PtCas 4 share overall sequence identities of 55.88%-74.86%, 8.47%-46.54% and 20.11%-50.87%, respectively, with their other crustacean species. PtCas 2, PtCas 3 and PtCas 4 have the same caspase domain and catalytic site found in known caspases. The expression levels of the three caspases differed between tissues. Following bacterial and viral infection, the expression levels of the three caspases reached a maximum level at 24 h post-infection (hpi) in case of bacteria, whereas it was 48 hpi in virus. Moreover, the WSSV, Vibrio alginolyticus or V. parahaemolyticus induced the activities of PtCas 2-4 in a time-dependent manner. These results indicate an involvement of caspases in bacterial and viral induced immune response and demonstrate for the first time that PtCas 2, PtCas 3 and PtCas 4 are essential for optimal response to bacterial and virus infection in crabs.
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Affiliation(s)
- Xianyun Ren
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, PR China
| | - Xuan Yu
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, PR China; College of Fisheries and Life Science, Dalian Ocean University, Dalian, China
| | - Baoquan Gao
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, PR China
| | - Ping Liu
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, PR China
| | - Jian Li
- Key Laboratory for Sustainable Utilization of Marine Fisheries Resources, Ministry of Agriculture, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, PR China; Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, PR China.
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22
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Reis MA, Ahmed OB, Spengler G, Molnár J, Lage H, Ferreira MJU. Exploring Jolkinol D Derivatives To Overcome Multidrug Resistance in Cancer. J Nat Prod 2017; 80:1411-1420. [PMID: 28421773 DOI: 10.1021/acs.jnatprod.6b01084] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Macrocyclic monoacyl lathyrane derivatives bearing a benzoyl moiety were previously found to be strong ABCB1 modulators. To explore the effects of different substituents of the aromatic moiety, 14 new compounds (1.1-1.7, 1.10, and 2.1-2.4) were prepared from jolkinol D (1), obtained from Euphorbia piscatoria, and from jolkinodiol (2), its hydrolysis derivative. Compounds 1.8 and 1.9, having aliphatic moieties, were also obtained. The reversal of ABCB1-mediated MDR was evaluated through functional and chemosensitivity assays on the human ABCB1-gene-transfected L5178Y mouse T-lymphoma cell line. Structure-activity relationships showed that addition of electron-donating groups to the aromatic moiety improved the activity. The effects on the ATPase activity of the strongest modulator (1.3) and the inactive jolkinol D (1) were also investigated and compared. Moreover, in the chemosensitivity assay, most of the compounds interacted synergistically with doxorubicin. Compounds 1.1-1.10 and 2.1-2.4 were further assessed for their collateral sensitivity effect against the human cancer cells: EPG85-257 (gastric) and EPP85-181 (pancreatic), and the matching drug-selected cells EPG85-257RDB, EPG85-257RNOV, EPP85-181RDB, and EPP85-181RNOV. The most promising ones (1.8 and 1.10) along with compound 3, previously selected, were investigated as apoptosis inducers. The compounds were able to induce apoptosis through caspase-3 activation, with significant differences being observed between the parental and resistant cells.
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Affiliation(s)
- Mariana A Reis
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , Avenue Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Omar B Ahmed
- Institute of Pathology, University Hospital Charité , 10117 Berlin, Germany
| | - Gabriella Spengler
- Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged , Dóm tér 10, H-6720 Szeged, Hungary
| | - Joseph Molnár
- Department of Medical Microbiology and Immunobiology, Faculty of Medicine, University of Szeged , Dóm tér 10, H-6720 Szeged, Hungary
| | - Hermann Lage
- Institute of Pathology, University Hospital Charité , 10117 Berlin, Germany
| | - Maria-José U Ferreira
- Research Institute for Medicines (iMed.ULisboa), Faculty of Pharmacy, Universidade de Lisboa , Avenue Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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23
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Abstract
The formulation in which therapeutic proteins are administered plays a key role in retaining their biological activity. Enzyme wrapping, using synthetic polymers, is a strategy employed to provide enzymes with lower immunogenicity, longer circulation times, and better targeting capabilities. Protein-polymer complexation methods, involving covalent, noncovalent, and electrostatic interactions, that can provide means to develop formulations for retaining enzyme stability are discussed in this chapter. Amphiphilic self-cross-linkable polymer was used to encapsulate capsase-3 enzyme in the nanogel, while inverse emulsion polymerization method was used to entrap α-glucosidase enzyme in the nanogel. These nanogels were characterized by dynamic light scattering, transmission electron microscopy, and gel electrophoresis. Upon release of caspase-3 enzyme from polymeric nanogel, it retained nearly 86% of its original activity. Similarly, α-glucosidase that was encased in the acid cleavable polymeric nanogel exhibited substantial activity after release under acidic conditions (pH 5, 48h). Nano-armoring of the enzymes were nearly complete and provided high yields of the encased enzyme.
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Sun S, Xuan F, Fu H, Zhu J, Ge X, Wu X. Molecular cloning, characterization and expression analysis of caspase-3 from the oriental river prawn, Macrobrachium nipponense when exposed to acute hypoxia and reoxygenation. Fish Shellfish Immunol 2017; 62:291-302. [PMID: 28159694 DOI: 10.1016/j.fsi.2017.01.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/20/2017] [Accepted: 01/27/2017] [Indexed: 06/06/2023]
Abstract
Caspases are present in the cytosol as inactive proenzymes but become activated when apoptosis is initiated, playing an essential role at various stages of the process. In this study, a caspase-3 (Mncaspase-3c) was cloned from gill of the oriental river prawn Macrobrachium nipponense by reverse-transcription polymerase chain reaction and rapid amplification of cDNA ends, and its properties were characterized. The 1730-bp cDNA contained an open reading frame of 1566 bp, a 123-bp 5'-untranslated region (UTR), and a 41-bp 3'-UTR containing a poly(A) tail. The molecular mass of the deduced amino acid (aa) sequence (521 aa) was 56.3 kDa with an estimated pI of 5.01. The MnCaspase-3c sequence contained a predicted caspase family p20 domain and a caspase family p10 domain at positions 236-367 and 378-468 respectively. Recombinant MnCaspase-3c protein was expressed in Escherichia coli and purified. In vitro activity assays indicated that the recombinant MnCaspase-3c hydrolyzed the substrate Ac-DEVD-pNA, suggesting a physiological role as a caspase-3. Caspase-3c gene transcripts were distributed in all M. nipponense tissues tested by quantitative RT-PCR, being especially abundant in hemocytes. Comet assays in gill tissues showed an obvious time-dependent response to hypoxia. Furthermore, Mncaspase-3c, at both the mRNA and protein levels, was demonstrated to participate in the apoptotic process in gill after stimulation by acute hypoxia. Overall, these results indicate that hypoxia triggers apoptosis in shrimp gill tissues.
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Affiliation(s)
- Shengming Sun
- Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Centre, Chinese Academy of Fishery Sciences, Wuxi 214081, PR China
| | - Fujun Xuan
- Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng City, Jiangsu Province 224002, PR China
| | - Hongtuo Fu
- Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Centre, Chinese Academy of Fishery Sciences, Wuxi 214081, PR China.
| | - Jian Zhu
- Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Centre, Chinese Academy of Fishery Sciences, Wuxi 214081, PR China.
| | - Xianping Ge
- Key Laboratory of Genetic Breeding and Aquaculture Biology of Freshwater Fishes, Ministry of Agriculture, Freshwater Fisheries Research Centre, Chinese Academy of Fishery Sciences, Wuxi 214081, PR China
| | - Xugan Wu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Shanghai Ocean University, Ministry of Education, Shanghai 201306, PR China
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25
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Prokop JW, Lazar J, Crapitto G, Smith DC, Worthey EA, Jacob HJ. Molecular modeling in the age of clinical genomics, the enterprise of the next generation. J Mol Model 2017; 23:75. [PMID: 28204942 DOI: 10.1007/s00894-017-3258-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 01/23/2017] [Indexed: 01/31/2023]
Abstract
Protein modeling and molecular dynamics hold a unique toolset to aide in the characterization of clinical variants that may result in disease. Not only do these techniques offer the ability to study under characterized proteins, but they do this with the speed that is needed for time-sensitive clinical cases. In this paper we retrospectively study a clinical variant in the XIAP protein, C203Y, while addressing additional variants seen in patients with similar gastrointestinal phenotypes as the C203Y mutation. In agreement with the clinical tests performed on the C203Y patient, protein modeling and molecular dynamics suggest that direct interactions with RIPK2 and Caspase3 are altered by the C203Y mutation and subsequent loss of Zn coordination in the second BIR domain of XIAP. Interestingly, the variant does not appear to alter interactions with SMAC, resulting in further damage to the caspase and NOD2 pathways. To expand the computational strategy designed when studying XIAP, we have applied the molecular modeling tools to a list of 140 variants seen in CFTR associated with cystic fibrosis, and a list of undiagnosed variants in 17 different genes. This paper shows the exciting applications of molecular modeling in the classification and characterization of genetic variants identified in next generation sequencing. Graphical abstract XIAP in Caspase 3 and NOD2 signaling pathways.
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Affiliation(s)
- Jeremy W Prokop
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA.
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
| | - Jozef Lazar
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Gabrielle Crapitto
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - D Casey Smith
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA
| | - Elizabeth A Worthey
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Howard J Jacob
- HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL, 35806, USA
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
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26
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Tucker MB, MacKenzie SH, Maciag JJ, Dirscherl Ackerman H, Swartz P, Yoder JA, Hamilton PT, Clay Clark A. Phage display and structural studies reveal plasticity in substrate specificity of caspase-3a from zebrafish. Protein Sci 2016; 25:2076-2088. [PMID: 27577093 PMCID: PMC5079243 DOI: 10.1002/pro.3032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 08/02/2016] [Accepted: 08/25/2016] [Indexed: 01/27/2023]
Abstract
The regulation of caspase-3 enzyme activity is a vital process in cell fate decisions leading to cell differentiation and tissue development or to apoptosis. The zebrafish, Danio rerio, has become an increasingly popular animal model to study several human diseases because of their transparent embryos, short reproductive cycles, and ease of drug administration. While apoptosis is an evolutionarily conserved process in metazoans, little is known about caspases from zebrafish, particularly regarding substrate specificity and allosteric regulation compared to the human caspases. We cloned zebrafish caspase-3a (casp3a) and examined substrate specificity of the recombinant protein, Casp3a, compared to human caspase-3 (CASP3) by utilizing M13 bacteriophage substrate libraries that incorporated either random amino acids at P5-P1' or aspartate fixed at P1. The results show a preference for the tetrapeptide sequence DNLD for both enzymes, but the P4 position of zebrafish Casp3a also accommodates valine equally well. We determined the structure of zebrafish Casp3a to 2.28Å resolution by X-ray crystallography, and when combined with molecular dynamics simulations, the results suggest that a limited number of amino acid substitutions near the active site result in plasticity of the S4 sub-site by increasing flexibility of one active site loop and by affecting hydrogen-bonding with substrate. The data show that zebrafish Casp3a exhibits a broader substrate portfolio, suggesting overlap with the functions of caspase-6 in zebrafish development.
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Affiliation(s)
- Matthew B Tucker
- Department of Molecular and Structural Biochemistry, NC State University, Raleigh, North Carolina, 27608
| | - Sarah H MacKenzie
- Department of Molecular and Structural Biochemistry, NC State University, Raleigh, North Carolina, 27608
| | - Joseph J Maciag
- Department of Molecular and Structural Biochemistry, NC State University, Raleigh, North Carolina, 27608
| | | | - Paul Swartz
- Department of Molecular and Structural Biochemistry, NC State University, Raleigh, North Carolina, 27608
| | - Jeffrey A Yoder
- Department of Molecular Biomedical Sciences, NC State University, Raleigh, North Carolina, 27608
| | - Paul T Hamilton
- Department of Plant and Microbial Biology, NC State University, Raleigh, North Carolina, 27608
| | - A Clay Clark
- Department of Biology, University of Texas at Arlington, Arlington, Texas, 76019.
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27
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Zheng J, Mao Y, Su Y, Wang J. Effects of nitrite stress on mRNA expression of antioxidant enzymes, immune-related genes and apoptosis-related proteins in Marsupenaeus japonicus. Fish Shellfish Immunol 2016; 58:239-252. [PMID: 27582290 DOI: 10.1016/j.fsi.2016.08.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 08/23/2016] [Accepted: 08/26/2016] [Indexed: 06/06/2023]
Abstract
Nitrite accumulation in aquaculture systems is a potential risk factor that may trigger stress responses in aquatic organisms. However, the mechanisms regulating the responses of shrimp to nitrite stress remain unclear. In this study, full-length cDNA sequences of two apoptosis-related genes, caspase-3 and defender against apoptotic death (DAD-1), were cloned from Marsupenaeus japonicus for the first time, and their expression levels and tissue distribution were analyzed by quantitative real-time PCR (qRT-PCR). The full lengths of Mjcaspase-3 and MjDAD-1 were 1203 bp and 640 bp respectively, with deduced amino acid (AA) sequences of 321 and 114 AA. Mjcaspase-3 was predominantly expressed in haemocytes and weakly expressed in the seven other tissues tested. MjDAD-1 was mainly expressed in the defense and digestive tissues, especially in the hepatopancreas and hemocytes. To explore the influence of nitrite stress on the genetic response of antioxidant enzymes, immune-related genes and apoptosis-related proteins, the mRNA expression profiles of MjCAT, MjMnSOD, Mj-ilys, Mj-sty, Mjcaspase-3 and MjDAD-1 in response to nitrite stress were analyzed by qRT-PCR. The mRNA levels of MjCAT, MjMnSOD, Mj-ilys, Mj-sty, Mjcaspase-3 and MjDAD-1 show both time- and dose-dependent changes in response to nitrite stress. The mRNA expression levels of MjCAT and MjSOD peaked at 6 h for all nitrite concentrations tested (p < 0.05) and the up-regulated of MjCAT and MjSOD exhibited a positive correlation with the nitrite concentration. The mRNA expression levels of Mj-ilys and Mj-sty gradually decreased during the experiment period. Mjcaspase-3 mRNA level reached a maximum at 6 h (p < 0.05), and MjDAD-1 reached its peak at 12 h and 48 h in 10 mg/L and 20 mg/L nitrite, respectively. In addition, CAT and SOD activity showed changes in response to nitrite stress that mirrored the induced expression of MjCAT and MjMnSOD, and prolonged nitrite exposure reduced the activity of CAT. This study provided basic data for further elucidating the responses of shrimp to nitrite stress at the molecular level.
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Affiliation(s)
- Jinbin Zheng
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Yong Mao
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China.
| | - Yongquan Su
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
| | - Jun Wang
- College of Ocean and Earth Sciences, Xiamen University, Xiamen, 361102, China
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28
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Sawai H. Induction of Apoptosis in TNF-Treated L929 Cells in the Presence of Necrostatin-1. Int J Mol Sci 2016; 17:ijms17101678. [PMID: 27739412 PMCID: PMC5085711 DOI: 10.3390/ijms17101678] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 09/09/2016] [Accepted: 09/27/2016] [Indexed: 12/20/2022] Open
Abstract
It has been shown that necroptosis—caspase-independent programmed necrotic cell death—can be induced by treatment with tumor necrosis factor (TNF) in the L929 murine fibrosarcoma cell line, even in the absence of a caspase inhibitor. Although it was reported that necrostatin-1—a specific inhibitor of necroptosis—inhibited TNF-induced necroptosis in L929 cells, it has not been elucidated whether the cells eventually die by apoptosis in the presence of necrostatin-1. In this paper, induction of apoptosis was demonstrated in TNF-treated L929 cells in the presence of necrostatin-1. Co-treatment with cycloheximide expedited apoptosis induction in necrostatin-1/TNF-treated L929 cells: typical apoptotic morphological changes, including membrane blebbing and nuclear fragmentation, induction of caspase-3 activity, proteolytic activation of caspases-3, -8, and -9, and cleavage of poly(ADP-ribose) polymerase (PARP) (a well-known substrate of caspase-3) were observed. Moreover, co-treatment with Z-VAD-fmk (a pan-caspase inhibitor) inhibited apoptosis by completely inhibiting caspases, resulting in a shift from apoptosis to necroptosis. In contrast, co-treatment with Z-Asp-CH2-DCB (a caspase inhibitor preferential to caspase-3) inhibited apoptosis without expediting necroptosis. These results indicate that apoptosis can be induced in TNF-treated L929 cells when the cells are protected from necroptosis, and support the notion that partial activation of caspase-8 in the presence of a caspase inhibitor preferential to caspase-3 suppresses both apoptosis and necroptosis.
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Affiliation(s)
- Hirofumi Sawai
- Department of Internal Medicine, Osaka Dental University, Hirakata 573-1121, Japan.
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29
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Kang YF, Qiao HX, Xin LZ, Ge LP. Chain elongation analog of resveratrol as potent cancer chemoprevention agent. J Physiol Biochem 2016; 72:445-52. [PMID: 27160168 DOI: 10.1007/s13105-016-0487-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Accepted: 04/12/2016] [Indexed: 11/26/2022]
Abstract
Resveratrol is identified as a natural cancer chemoprevention agent. There has been a lot of interest in designing and developing resveratrol analogs with cancer chemoprevention activity superior to that of parent molecule and exploring their action mechanism in the past several decades. In this study, we have synthesized resveratrol analogs of compounds A-C via conjugated chain elongation based on isoprene unit retention strategy. Remarkably, cytotoxic activity analysis results indicated that compound B possesses the best proliferation inhibition activity for NCI-H460 cells in all the test compounds. Intriguingly, compound B displayed a higher cytotoxicity against human non-small cell lung cancer cells (NCI-H460) compared to normal human embryonic lung fibroblasts (MRC-5). Afterward, flow cytometry analysis showed that compound B would induce cell apoptosis. We further researched the action mechanism. When NCI-H460 cells were incubated by compound B for 6 or 9 h, respectively, the intracellular reactive oxygen species (ROS) level was enhanced obviously. With elevation of intracellular ROS level, flow cytometry measurement verified mitochondrial transmembrane potential collapse, which was accompanied by the up-regulation of Bax and down-regulation of Bcl-2. More interestingly, compound B increased the expression of caspase-9 and caspase-3, which induced cell apoptosis. Moreover, compound B arrested cell cycle in G0/G1 phase. These are all to provide useful information for designing resveratrol-based chemoprevention agent and understanding the action mechanism.
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Affiliation(s)
- Yan-Fei Kang
- College of Laboratory Medicine, Hebei North University, 11 Diamond Street South, Zhangjiakou, 075000, Hebei Province, People's Republic of China.
| | - Hai-Xia Qiao
- College of Laboratory Medicine, Hebei North University, 11 Diamond Street South, Zhangjiakou, 075000, Hebei Province, People's Republic of China
| | - Long-Zuo Xin
- College of Agriculture and Forestry Science and Technology, Hebei North University, Zhangjiakou, 075000, Hebei, China
| | - Li-Ping Ge
- College of Laboratory Medicine, Hebei North University, 11 Diamond Street South, Zhangjiakou, 075000, Hebei Province, People's Republic of China
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Yang G, Zhang W, Qin Q, Wang J, Zheng H, Xiong W, Yuan J. Mono(2-ethylhexyl) phthalate induces apoptosis in p53-silenced L02 cells via activation of both mitochondrial and death receptor pathways. Environ Toxicol 2015; 30:1178-1191. [PMID: 24706461 DOI: 10.1002/tox.21990] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 03/21/2014] [Accepted: 03/23/2014] [Indexed: 06/03/2023]
Abstract
Mono(2-ethylhexyl) phthalate (MEHP) is one of the main metabolites of di(2-ethylhexyl) phthalate. The evidence shows that DEHP may exert its toxic effects primarily via MEHP, which is 10-fold more potent than its parent compound in toxicity in vitro. MEHP-induced apoptosis is mediated by either p53-dependent or -independent pathway. However, the detailed mechanism of its toxicity remains unclear. In this study, immortalized normal human liver cell line L02 was chosen, as an in vitro model of nonmalignant liver, to elucidate the role of p53 in MEHP-induced apoptosis. The cells were treated with MEHP (6.25, 12.50, 25.00, 50.00, and 100.00 μM) for 24 and 36 h, then small interfering RNA (siRNA) was used to specifically silence p53 gene of L02 cells. The results indicated that MEHP caused oxidative DNA damage and apoptosis in L02 cells were associated with the p53 signaling pathway. Further study found that MEHP (50.00 and 100.00 μM) induced apoptosis in p53-silenced L02 cells, along with the up-regulations of Fas and FasL proteins as well as increased the Bax/Bcl-2 ratio and Caspase 3, 8, and 9 activities. Additionally, both FasL inhibitor (AF-016) and Caspase inhibitor N-benzyloxycarbonyl-Val-Ala-Asp- fluoromethylketone (Z-VAD-FMK) could prevent the cell apoptosis induced by MEHP. The findings suggested that MEHP-induced apoptosis in L02 cells involving a Caspases-mediated mitochondrial signaling pathway and/or death receptor pathway. p53 was not absolutely necessary for MEHP-induced L02 cell apoptosis.
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Affiliation(s)
- Guangtao Yang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
| | - Wenjuan Zhang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
| | - Qizhi Qin
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
| | - Jing Wang
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
| | - Hongyan Zheng
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
| | - Wei Xiong
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
| | - Jing Yuan
- Department of Occupational and Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, People's Republic of China
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Tran TH, Ramasamy T, Choi JY, Nguyen HT, Pham TT, Jeong JH, Ku SK, Choi HG, Yong CS, Kim JO. Tumor-targeting, pH-sensitive nanoparticles for docetaxel delivery to drug-resistant cancer cells. Int J Nanomedicine 2015; 10:5249-62. [PMID: 26346426 PMCID: PMC4552257 DOI: 10.2147/ijn.s89584] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The attachment of polyethylene glycol (PEG) increases the circulation time of drug-containing nanoparticles; however, this also negatively affects cellular uptake. To overcome this problem, unique lipid polymer hybrid (LPH) nanoparticles were developed with a pH-responsive PEG layer that detached prior to cell uptake. Docetaxel (DTX) was incorporated into the lipid core of the nanoparticles, which was then shielded with the pH-responsive block co-polymer polyethylene glycol-b-polyaspartic acid (PEG-b-PAsp) using a modified emulsion method. The optimized LPH nanoparticles were ~200 nm and had a narrow size distribution. Drug release from DTX-loaded LPH (DTX-LPH) nanoparticles was pH-sensitive, which is beneficial for tumor targeting. More importantly, DTX-LPH nanoparticles were able to effectively induce apoptosis in cancer cells. The negative surface charge and PEG shell of vehicle remarkably enhanced the blood circulation and physiological activity of DTX-LPH nanoparticles compared with that of free DTX. The nanoparticles were also found to reduce the size of tumors in tumor-bearing xenograft mice. The in vivo anticancer effect of DTX-LPH nanoparticles was further confirmed by the elevated levels of caspase-3 and poly ADP ribose polymerase found in the tumors after treatment. Thus, the results suggest that this novel LPH system could be an effective new treatment for cancer.
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Affiliation(s)
- Tuan Hiep Tran
- College of Pharmacy, Yeungnam University, Dae-Dong, South Korea
| | | | - Ju Yeon Choi
- College of Pharmacy, Yeungnam University, Dae-Dong, South Korea
| | | | - Thanh Tung Pham
- College of Pharmacy, Yeungnam University, Dae-Dong, South Korea
| | - Jee-Heon Jeong
- College of Pharmacy, Yeungnam University, Dae-Dong, South Korea
| | - Sae Kwang Ku
- College of Korean Medicine, Daegu Haany University, Gyeongsan, South Korea
| | - Han-Gon Choi
- College of Pharmacy, Hanyang University, Hanyangdaehak-ro, Sangnok-gu, Ansan, South Korea
| | - Chul Soon Yong
- College of Pharmacy, Yeungnam University, Dae-Dong, South Korea
| | - Jong Oh Kim
- College of Pharmacy, Yeungnam University, Dae-Dong, South Korea
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Goryashchenko AS, Khrenova MG, Bochkova AA, Ivashina TV, Vinokurov LM, Savitsky AP. Genetically Encoded FRET-Sensor Based on Terbium Chelate and Red Fluorescent Protein for Detection of Caspase-3 Activity. Int J Mol Sci 2015; 16:16642-54. [PMID: 26204836 PMCID: PMC4519970 DOI: 10.3390/ijms160716642] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 06/30/2015] [Accepted: 07/06/2015] [Indexed: 12/01/2022] Open
Abstract
This article describes the genetically encoded caspase-3 FRET-sensor based on the terbium-binding peptide, cleavable linker with caspase-3 recognition site, and red fluorescent protein TagRFP. The engineered construction performs two induction-resonance energy transfer processes: from tryptophan of the terbium-binding peptide to Tb(3+) and from sensitized Tb(3+) to acceptor--the chromophore of TagRFP. Long-lived terbium-sensitized emission (microseconds), pulse excitation source, and time-resolved detection were utilized to eliminate directly excited TagRFP fluorescence and background cellular autofluorescence, which lasts a fraction of nanosecond, and thus to improve sensitivity of analyses. Furthermore the technique facilitates selective detection of fluorescence, induced by uncleaved acceptor emission. For the first time it was shown that fluorescence resonance energy transfer between sensitized terbium and TagRFP in the engineered construction can be studied via detection of microsecond TagRFP fluorescence intensities. The lifetime and distance distribution between donor and acceptor were calculated using molecular dynamics simulation. Using this data, quantum yield of terbium ions with binding peptide was estimated.
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Affiliation(s)
| | - Maria G Khrenova
- M. V. Lomonosov Moscow State University, Department of Chemistry, 119991 Moscow, Russia.
| | - Anna A Bochkova
- M. V. Lomonosov Moscow State University, Department of Chemistry, 119991 Moscow, Russia.
| | - Tatiana V Ivashina
- Skryabin Institute of Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, 142290 Pushchino, Russia.
| | - Leonid M Vinokurov
- Branch of Shemyakin and Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 142290 Pushchino, Russia.
| | - Alexander P Savitsky
- A. N. Bach Institute of Biochemistry, Russian Academy of Sciences, 119071 Moscow, Russia.
- M. V. Lomonosov Moscow State University, Department of Chemistry, 119991 Moscow, Russia.
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Ozdemir A, Ibisolu B, Simay YD, Polat B, Ark M. [Ouabain induces Rho-dependent rock activation and membrane blebbing incultured endothelial cells]. Mol Biol (Mosk) 2015; 49:158-64. [PMID: 25916120 DOI: 10.7868/s0026898415010139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Small G protein Rho and its most studied effectors, ROCK I and ROCK II, are involved in several cellular fuctions including smooth muscle and non-muscle cell contractions, cell migration and apoptosis. Activation of ROCK I by caspase-3 and activation of ROCK II by granzyme B are essential for membrane blebbing in the execution phase of apoptosis. In contrast, it has been demonstrated that Rho signaling is critical for blebbing developed after serum removal. As it was shown by us previously, ouabain induces membrane blebbing and proteolitic cleavage of ROCK I and ROCK II via caspases in human umbilical endothelial cells. However, caspase inhibitors do not prevent ouabain-induced blebs. Ouabain induces concentration-dependent cell death and membrane blebbing in endothelial cells. The aim of this study was to identify the possible role of Rho in ouabain-induced membrane blebbing. Pretreatment of endothelial cells with a Rho inhibitor CT04 did not inhibit the ouabain-induced cell death but prevented the development ofbleb formation. These results indicate that bleb formation is dependent on Rho activity in ouabain-induced cell death in HUVECs. Taken together, these results suggest that the mechanism of membrane bleb formation might be different depending on cell type and cell death-stimuli.
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Khan S, Ahmad K, Alshammari EMA, Adnan M, Baig MH, Lohani M, Somvanshi P, Haque S. Implication of Caspase-3 as a Common Therapeutic Target for Multineurodegenerative Disorders and Its Inhibition Using Nonpeptidyl Natural Compounds. Biomed Res Int 2015; 2015:379817. [PMID: 26064904 PMCID: PMC4434175 DOI: 10.1155/2015/379817] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 04/13/2015] [Accepted: 04/14/2015] [Indexed: 12/27/2022]
Abstract
Caspase-3 has been identified as a key mediator of neuronal apoptosis. The present study identifies caspase-3 as a common player involved in the regulation of multineurodegenerative disorders, namely, Alzheimer's disease (AD), Parkinson's disease (PD), Huntington's disease (HD), and amyotrophic lateral sclerosis (ALS). The protein interaction network prepared using STRING database provides a strong evidence of caspase-3 interactions with the metabolic cascade of the said multineurodegenerative disorders, thus characterizing it as a potential therapeutic target for multiple neurodegenerative disorders. In silico molecular docking of selected nonpeptidyl natural compounds against caspase-3 exposed potent leads against this common therapeutic target. Rosmarinic acid and curcumin proved to be the most promising ligands (leads) mimicking the inhibitory action of peptidyl inhibitors with the highest Gold fitness scores 57.38 and 53.51, respectively. These results were in close agreement with the fitness score predicted using X-score, a consensus based scoring function to calculate the binding affinity. Nonpeptidyl inhibitors of caspase-3 identified in the present study expeditiously mimic the inhibitory action of the previously identified peptidyl inhibitors. Since, nonpeptidyl inhibitors are preferred drug candidates, hence, discovery of natural compounds as nonpeptidyl inhibitors is a significant transition towards feasible drug development for neurodegenerative disorders.
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Affiliation(s)
- Saif Khan
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Ha'il, Ha'il 2440, Saudi Arabia
| | - Khurshid Ahmad
- Department of Biosciences, Integral University, Lucknow, Uttar Pradesh 226026, India
| | - Eyad M. A. Alshammari
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Ha'il, Ha'il 2440, Saudi Arabia
| | - Mohd Adnan
- Department of Clinical Nutrition, College of Applied Medical Sciences, University of Ha'il, Ha'il 2440, Saudi Arabia
| | - Mohd Hassan Baig
- School of Biotechnology, Yeungnam University, Gyeongsan 712749, Republic of Korea
| | - Mohtashim Lohani
- Department of Biosciences, Integral University, Lucknow, Uttar Pradesh 226026, India
| | - Pallavi Somvanshi
- Department of Biotechnology, TERI University, New Delhi 110070, India
| | - Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing & Allied Health Sciences, Jazan University, Jazan 45142, Saudi Arabia
- Department of Biosciences, Jamia Millia Islamia, New Delhi 110025, India
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Shan H, Yan R, Diao J, Lin L, Wang S, Zhang M, Zhang R, Wei J. Involvement of caspases and their upstream regulators in myocardial apoptosis in a rat model of selenium deficiency-induced dilated cardiomyopathy. J Trace Elem Med Biol 2015; 31:85-91. [PMID: 26004897 DOI: 10.1016/j.jtemb.2015.03.005] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 02/24/2015] [Accepted: 03/24/2015] [Indexed: 12/19/2022]
Abstract
Keshan disease is an endemic dilated cardiomyopathy (DCM) which is closely related with selenium-deficient diet in China. In the previous study, we reported that the low selenium status plays a pivotal role in the myocardial apoptosis in the DCM rats, however, the underlying mechanism remains unclear. The present study aimed to determine whether the intrinsic, extrinsic pathways and the upstream regulators were involved in the myocardial apoptosis of selenium deficiency-induced DCM rats. Therefore, the rat model of endemic DCM was induced by a selenium-deficient diet for 12 weeks. Accompanied with significant dilation and impaired systolic function of left ventricle, an enhanced myocardial apoptosis was detected by TUNEL assay. Western blot analysis showed remarkably increased protein levels of cleaved caspase-3, caspase-8, caspase-9, and cytosolic cytochrome c released from the mitochondria. In addition, the immunoreactivities of p53 and Bax were significantly up-regulated, while the anti-apoptotic Bcl-2 family members Bcl-2 and Bcl-X(L) were down-regulated. Furthermore, appropriate selenium supplement for another 4 weeks could partially reverse all the above changes. In conclusion, the intrinsic, extrinsic pathways and the upstream regulators such as p53, Bax, Bcl-2, and Bcl-X(L )were all involved in selenium deficiency-induced myocardial apoptosis.
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Affiliation(s)
- Hu Shan
- Department of Cardiology, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China; Department of Endemic Disease, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China
| | - Rui Yan
- Department of Cardiology, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China; Department of Endemic Disease, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China
| | - Jiayu Diao
- Department of Cardiology, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China
| | - Lin Lin
- Department of Cardiology, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China
| | - Suqin Wang
- Department of Cardiology, Henan Provincial People's Hospital, 7 Weiwu Road, Zhengzhou, Henan, 450003, China
| | - Ming Zhang
- Key Laboratory of Trace Elements and Endemic Disease of Ministry of Health, Xi'an Jiaotong University School of Medicine, 76 Yantaxi Road, Xi'an, Shaanxi 710061, China
| | - Rong Zhang
- Key Laboratory of Trace Elements and Endemic Disease of Ministry of Health, Xi'an Jiaotong University School of Medicine, 76 Yantaxi Road, Xi'an, Shaanxi 710061, China
| | - Jin Wei
- Department of Cardiology, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China; Department of Endemic Disease, The Second Affiliated Hospital, Xi'an Jiaotong University School of Medicine, 157 Xiwu Road, Xi'an, Shaanxi 710004, China.
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Kanugula AK, Dhople VM, Völker U, Ummanni R, Kotamraju S. Fluvastatin mediated breast cancer cell death: a proteomic approach to identify differentially regulated proteins in MDA-MB-231 cells. PLoS One 2014; 9:e108890. [PMID: 25268751 PMCID: PMC4182601 DOI: 10.1371/journal.pone.0108890] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 09/04/2014] [Indexed: 01/12/2023] Open
Abstract
Statins are increasingly being recognized as anti-cancer agents against various cancers including breast cancer. To understand the molecular pathways targeted by fluvastatin and its differential sensitivity against metastatic breast cancer cells, we analyzed protein alterations in MDA-MB-231 cells treated with fluvastatin using 2-DE in combination with LC-MS/MS. Results revealed dys-regulation of 39 protein spots corresponding to 35 different proteins. To determine the relevance of altered protein profiles with breast cancer cell death, we mapped these proteins to major pathways involved in the regulation of cell-to-cell signaling and interaction, cell cycle, Rho GDI and proteasomal pathways using IPA analysis. Highly interconnected sub networks showed that vimentin and ERK1/2 proteins play a central role in controlling the expression of altered proteins. Fluvastatin treatment caused proteolysis of vimentin, a marker of epithelial to mesenchymal transition. This effect of fluvastatin was reversed in the presence of mevalonate, a downstream product of HMG-CoA and caspase-3 inhibitor. Interestingly, fluvastatin neither caused an appreciable cell death nor did modulate vimentin expression in normal mammary epithelial cells. In conclusion, fluvastatin alters levels of cytoskeletal proteins, primarily targeting vimentin through increased caspase-3- mediated proteolysis, thereby suggesting a role for vimentin in statin-induced breast cancer cell death.
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Affiliation(s)
| | - Vishnu M. Dhople
- Interfacultary Institute of Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Uwe Völker
- Interfacultary Institute of Genetics and Functional Genomics, University Medicine Greifswald, Greifswald, Germany
| | - Ramesh Ummanni
- Centre for Chemical Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- * E-mail: (SK); (RU)
| | - Srigiridhar Kotamraju
- Centre for Chemical Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, India
- * E-mail: (SK); (RU)
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Hu G, Wang K, Groenendyk J, Barakat K, Mizianty MJ, Ruan J, Michalak M, Kurgan L. Human structural proteome-wide characterization of Cyclosporine A targets. ACTA ACUST UNITED AC 2014; 30:3561-6. [PMID: 25172926 DOI: 10.1093/bioinformatics/btu581] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
MOTIVATION Off-target interactions of a popular immunosuppressant Cyclosporine A (CSA) with several proteins besides its molecular target, cyclophilin A, are implicated in the activation of signaling pathways that lead to numerous side effects of this drug. RESULTS Using structural human proteome and a novel algorithm for inverse ligand binding prediction, ILbind, we determined a comprehensive set of 100+ putative partners of CSA. We empirically show that predictive quality of ILbind is better compared with other available predictors for this compound. We linked the putative target proteins, which include many new partners of CSA, with cellular functions, canonical pathways and toxicities that are typical for patients who take this drug. We used complementary approaches (molecular docking, molecular dynamics, surface plasmon resonance binding analysis and enzymatic assays) to validate and characterize three novel CSA targets: calpain 2, caspase 3 and p38 MAP kinase 14. The three targets are involved in the apoptotic pathways, are interconnected and are implicated in nephrotoxicity.
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Affiliation(s)
- Gang Hu
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
| | - Kui Wang
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
| | - Jody Groenendyk
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
| | - Khaled Barakat
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
| | - Marcin J Mizianty
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
| | - Jishou Ruan
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
| | - Marek Michalak
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
| | - Lukasz Kurgan
- School of Mathematical Sciences and LPMC, Nankai University, Tianjin, 300071, PR China, Department of Biochemistry, Faculty of Pharmacy and Pharmaceutical Sciences, Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta, T6G 2R3, Canada and State Key Laboratory for Medicinal Chemical Biology, Nankai University, Tianjin, 300071, PR China
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Chávez-Mardones J, Gallardo-Escárate C. Immune response of apoptosis-related cysteine peptidases from the red abalone Haliotis rufescens (HrCas8 and HrCas3): molecular characterization and transcription expression. Fish Shellfish Immunol 2014; 39:90-98. [PMID: 24821426 DOI: 10.1016/j.fsi.2014.04.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/28/2014] [Accepted: 04/30/2014] [Indexed: 06/03/2023]
Abstract
Caspases play an important role in the different stages of programmed cell death, or apoptosis, which has been related to the immune response in multicellular organisms. The present study characterized an initiator caspase (HrCas8) and an effector caspase (HrCas3) from the red abalone Haliotis rufescens using the RACE method and qPCR analysis. HrCas8 showed a complete sequence of 2529 base pairs (bp) with an open-reading frame (ORF) of 1911 bp, a 5'UTR of 201 bp, and a 3'UTR of 417 bp. The estimated molecular mass for the 636 amino acids from HrCas8 was 71.5 kDa with an isoelectric point of 6.2. The HrCas8 sequence had two death-effector domains (DEDs) and the subunits p20 and p10, in addition to an active site characteristic of cysteine proteins. Meanwhile, the effector caspase HrCas3 showed a complete sequence of 1404 bp, a 5'UTR of 82 bp, and a 3'UTR of 574 bp. The ORF of this caspase had 747 bp that coded for 248 residues. Moreover, the predicted molecular mass of HrCas3 was 29.4 kDa; the theoretical isoelectric point was 5.70, and the sequence evidenced a conserved caspase recruitment domain (CARD). The distribution of the caspases in distinct tissues revealed that HrCas8 was principally expressed in the hemolymph, while HrCas3 had a higher expression in the gills. A basal level of expression was found for both caspases in muscle tissue. The immune response of caspases in H. rufescens was evaluated through an injection of Vibrio anguillarum. The results showed an increase in the transcription of HrCas8 post-challenge, as well as an activation of HrCas3, which together suggest the initiation of apoptosis as a response to bacterial infection in H. rufescens.
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Affiliation(s)
- Jacqueline Chávez-Mardones
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, P.O. Box 160-C, Concepción, Chile
| | - Cristian Gallardo-Escárate
- Laboratory of Biotechnology and Aquatic Genomics, Interdisciplinary Center for Aquaculture Research (INCAR), University of Concepción, P.O. Box 160-C, Concepción, Chile.
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Zhou L, Cai X, Han X, Ji L. P38 plays an important role in glucolipotoxicity-induced apoptosis in INS-1 cells. J Diabetes Res 2014; 2014:834528. [PMID: 24734256 PMCID: PMC3964802 DOI: 10.1155/2014/834528] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 01/27/2014] [Accepted: 01/30/2014] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES The mechanism underlying the regulation of glucolipotoxicity-induced apoptosis by MAPKs was examined in INS-1 cells. METHODS The rat insulinoma cell line INS-1 was cotreated with glucose (30 mM) and palmitic acid (0.2 mM) (GLU+PA). Apoptosis was assessed by cell morphology and detection of PARP cleavage. The activation of MAPKs was examined by Western blotting using specific antibodies against the phosphorylated forms of JNK, ERK1/2, and P38. RESULTS (1) Live cell imaging studies showed that treatment with GLU+PA for 72 h induced significant cell death, concomitant with PARP-1 cleavage and caspase-3 activation, which peaked at 96 h of treatment. (2) Western blot analysis of the activation of MAPKs during GLU+PA-induced INS-1 cell apoptosis showed that phosphorylation of P38 increased gradually and reached a peak at 96 h, which coincided with PARP-1 cleavage. A transient increase of ERK activation was followed by a rapid decline at 96 h, whereas JNK phosphorylation status remained unchanged in response to GLU+PA. (3) Phosphorylation of insulin receptor substrate (IRS)-2 at 48 h of treatment triggered its degradation, which coincided with P38 activation. (4) Inhibition of P38, but not JNK or ERK, blocked GLU+PA-induced INS-1 cell apoptosis. CONCLUSIONS P38 may be involved in the regulation of glucolipotoxicity-induced apoptosis through the phosphorylation of IRS-2.
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Affiliation(s)
- Lingli Zhou
- Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing 100044, China
| | - Xiaoling Cai
- Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing 100044, China
| | - Xueyao Han
- Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing 100044, China
| | - Linong Ji
- Department of Endocrinology and Metabolism, Peking University People's Hospital, Beijing 100044, China
- *Linong Ji:
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Lin X, Guan H, Huang Z, Liu J, Li H, Wei G, Cao X, Li Y. Downregulation of Bcl-2 expression by miR-34a mediates palmitate-induced Min6 cells apoptosis. J Diabetes Res 2014; 2014:258695. [PMID: 24829923 PMCID: PMC4009326 DOI: 10.1155/2014/258695] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 02/23/2014] [Accepted: 03/11/2014] [Indexed: 12/17/2022] Open
Abstract
Recent studies have demonstrated that the expression of miR-34a is significantly upregulated and associated with cell apoptosis in pancreatic β -cell treated with palmitate. Nevertheless, the underlying detailed mechanism is largely unknown. Here, we showed that miR-34a was significantly induced in Min6 pancreatic β -cell upon palmitate treatment. Elevated miR-34a promoted Min6 cell apoptosis. Intriguingly, ectopic expression of miR-34a lowered the expression of Bcl-2, an antiapoptotic protein. Luciferase reporter assay indicated the direct interaction of miR-34a with the Bcl-2 3'-UTR. Moreover, downregulated expression of Bcl-2 induced by palmitate could be restored by inhibition of miR-34a. We conclude that direct suppression of Bcl-2 by miR-34a accounts for palmitate-induced increased apoptosis rate in pancreatic β -cell.
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Affiliation(s)
- Xiaojie Lin
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
| | - Hongyu Guan
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
| | - Zhimin Huang
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
| | - Juan Liu
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
| | - Hai Li
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
| | - Guohong Wei
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
| | - Xiaopei Cao
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
| | - Yanbing Li
- Department of Endocrinology and Diabetes Center, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhongshan Road II, Guangzhou, Guangdong 510080, China
- *Yanbing Li:
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Li J, Li X, Shi X, He X, Wei W, Ma N, Chen H. Highly sensitive detection of caspase-3 activities via a nonconjugated gold nanoparticle-quantum dot pair mediated by an inner-filter effect. ACS Appl Mater Interfaces 2013; 5:9798-9802. [PMID: 24015837 DOI: 10.1021/am4029735] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We describe here a simple fluorometric assay for the highly sensitive detection of caspase-3 activities on the basis of the inner-filter effect of gold nanoparticles (AuNPs) on CdTe quantum dots (QDs). The method takes advantage of the high molar absorptivity of the plasmon band of gold nanoparticles as well as the large absorption band shift from 520 to 680 nm upon nanoparticle aggregation. When labeled with a peptide possessing the caspase-3 cleavage sequence (DEVD), the monodispersed Au-Ps (peptide-modified AuNPs) exhibited a tendency to aggregate when exposed to caspase-3, which induced the absorption band transition from 520 to 680 nm and turned on the fluorescence of the CdTe QDs for caspase-3 sensing. Under optimum conditions, a high sensitivity towards caspase-3 was achieved with a detection limit as low as 18 pM, which was much lower than the corresponding assays based on absorbance or other approaches. Overall, we demonstrated a facile and sensitive approach for caspase-3 detection, and we expected that this method could be potentially generalized to design more fluorescent assays for sensing other bioactive entities.
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Affiliation(s)
- Jingwen Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University , Suzhou 215123, China
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Yen TL, Hsu WH, Huang SKH, Lu WJ, Chang CC, Lien LM, Hsiao G, Sheu JR, Lin KH. A novel bioactivity of andrographolide from Andrographis paniculata on cerebral ischemia/reperfusion-induced brain injury through induction of cerebral endothelial cell apoptosis. Pharm Biol 2013; 51:1150-1157. [PMID: 23930775 DOI: 10.3109/13880209.2013.782051] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
CONTEXT Andrographolide, extracted from the leaves of Andrographis paniculata (Burm. f.) Nees (Acanthaceae), is a labdane diterpene lactone. It is widely reported to possess anti-inflammatory and antitumorigenic activities. Cerebral endothelial cells (CECs) play a crucial role in supporting the integrity and the function of the blood-brain barrier (BBB). However, no data are available concerning the effects of andrographolide in CECs. The aim of this study was to examine the detailed mechanisms of andrographolide on CECs. OBJECTIVE This study investigated a novel bioactivity of andrographolide on cerebral ischemia/reperfusion-induced brain injury. MATERIALS AND METHODS CECs were treated with andrographolide (20-100 µΜ) for the indicated times (0-24 h). After the reactions, cell survival rate and cytotoxicity were tested by the MTT assay and the lactate dehydrogenase (LDH) test, respectively. Western blotting was used to detect caspase-3 expression. In addition, analysis of cell cycle and apoptosis using PI staining and annexin V-FITC/PI labeling, respectively, was performed by flow cytometry. We also investigated the effect of andrographolide on middle cerebral artery occlusion (MCAO)/reperfusion-induced brain injury in a rat model. RESULTS In the present study, we found that andrographolide (50-100 µΜ) markedly inhibited CEC growth according to an MTT assay and caused CEC damage according to a LDH test. Our data also revealed that andrographolide (50 µM) induced CEC apoptosis and caspase-3 activation as respectively detected by PI/annexin-V double staining and western blotting. Moreover, andrographolide arrested the CEC cell cycle at the G0/G1 phase by PI staining. In addition, andrographolide (5 mg/kg) caused deterioration of MCAO/reperfusion-induced brain injury in a rat model. CONCLUSIONS These data suggest that andrographolide may disrupt BBB integrity, thereby deteriorating MCAO/reperfusion-induced brain injury, which are, in part, associated with its capacity to arrest cell-cycle and induce CEC apoptosis.
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Affiliation(s)
- Ting-Lin Yen
- Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan
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Lukacs C, Belunis C, Crowther R, Danho W, Gao L, Goggin B, Janson CA, Li S, Remiszewski S, Schutt A, Thakur MK, Singh SK, Swaminathan S, Pandey R, Tyagi R, Gosu R, Kamath AV, Kuglstatter A. The structure of XIAP BIR2: understanding the selectivity of the BIR domains. Acta Crystallogr D Biol Crystallogr 2013; 69:1717-25. [PMID: 23999295 PMCID: PMC3760131 DOI: 10.1107/s0907444913016284] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 06/11/2013] [Indexed: 11/11/2022]
Abstract
XIAP, a member of the inhibitor of apoptosis family of proteins, is a critical regulator of apoptosis. Inhibition of the BIR domain-caspase interaction is a promising approach towards treating cancer. Previous work has been directed towards inhibiting the BIR3-caspase-9 interaction, which blocks the intrinsic apoptotic pathway; selectively inhibiting the BIR2-caspase-3 interaction would also block the extrinsic pathway. The BIR2 domain of XIAP has successfully been crystallized; peptides and small-molecule inhibitors can be soaked into these crystals, which diffract to high resolution. Here, the BIR2 apo crystal structure and the structures of five BIR2-tetrapeptide complexes are described. The structural flexibility observed on comparing these structures, along with a comparison with XIAP BIR3, affords an understanding of the structural elements that drive selectivity between BIR2 and BIR3 and which can be used to design BIR2-selective inhibitors.
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Affiliation(s)
- Christine Lukacs
- Discovery Technologies, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Charles Belunis
- Discovery Technologies, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Robert Crowther
- Discovery Technologies, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Waleed Danho
- Medicinal Chemistry, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Lin Gao
- Discovery Technologies, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Barry Goggin
- Discovery Oncology, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Cheryl A. Janson
- Discovery Technologies, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Shirley Li
- Discovery Technologies, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Stacy Remiszewski
- Medicinal Chemistry, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | - Andrew Schutt
- Discovery Oncology, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
| | | | - Saroj K. Singh
- Structural Biology, Jubilant Biosys Ltd, Bangalore, India
| | | | - Rajat Pandey
- Structural Biology, Jubilant Biosys Ltd, Bangalore, India
| | - Rajiv Tyagi
- Structural Biology, Jubilant Biosys Ltd, Bangalore, India
| | | | | | - Andreas Kuglstatter
- Discovery Technologies, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
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Tang R, Kim CS, Solfiell DJ, Rana S, Mout R, Velázquez-Delgado EM, Chompoosor A, Jeong Y, Yan B, Zhu ZJ, Kim C, Hardy JA, Rotello VM. Direct delivery of functional proteins and enzymes to the cytosol using nanoparticle-stabilized nanocapsules. ACS Nano 2013; 7:6667-6673. [PMID: 23815280 PMCID: PMC3757120 DOI: 10.1021/nn402753y] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Intracellular protein delivery is an important tool for both therapeutic and fundamental applications. Effective protein delivery faces two major challenges: efficient cellular uptake and avoiding endosomal sequestration. We report here a general strategy for direct delivery of functional proteins to the cytosol using nanoparticle-stabilized capsules (NPSCs). These NPSCs are formed and stabilized through supramolecular interactions between the nanoparticle, the protein cargo, and the fatty acid capsule interior. The NPSCs are ~130 nm in diameter and feature low toxicity and excellent stability in serum. The effectiveness of these NPSCs as therapeutic protein carriers was demonstrated through the delivery of fully functional caspase-3 to HeLa cells with concomitant apoptosis. Analogous delivery of green fluorescent protein (GFP) confirmed cytosolic delivery as well as intracellular targeting of the delivered protein, demonstrating the utility of the system for both therapeutic and imaging applications.
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Affiliation(s)
- Rui Tang
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Chang Soo Kim
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - David J. Solfiell
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Subinoy Rana
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Rubul Mout
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Elih M. Velázquez-Delgado
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Apiwat Chompoosor
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Youngdo Jeong
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Bo Yan
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Zheng-Jiang Zhu
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Chaekyu Kim
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Jeanne A. Hardy
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
| | - Vincent M. Rotello
- Department of Chemistry, University of Massachusetts-Amherst, 710 North Pleasant Street, Amherst, Massachusetts, 01003, USA
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Chen K, Shu G, Peng X, Fang J, Cui H, Chen J, Wang F, Chen Z, Zuo Z, Deng J, Geng Y, Lai W. Protective role of sodium selenite on histopathological lesions, decreased T-cell subsets and increased apoptosis of thymus in broilers intoxicated with aflatoxin B₁. Food Chem Toxicol 2013; 59:446-54. [PMID: 23810797 DOI: 10.1016/j.fct.2013.06.032] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Revised: 06/16/2013] [Accepted: 06/18/2013] [Indexed: 01/15/2023]
Abstract
For evaluating the ability of selenium (Se) in counteracting the adverse effects of aflatoxin B₁ (AFB₁), two hundred 1-day-old male Avian broilers, divided into five groups, were fed with basal diet (control group), 0.3 mg/kg AFB₁ (AFB₁ group), 0.3 mg/kg AFB₁+0.2 mg/kg Se (+Se group I), 0.3mg/kg AFB₁+0.4 mg/kg Se (+Se group II) and 0.3mg/kg AFB₁+0.6 mg/kg Se (+Se group III), respectively. Compared with control group, the decreased relative weight of thymus and percentages of mature thymocytes, congestion in medulla and much debris in cortex of thymus, and the increased apoptotic thymocytes were observed in AFB1 group. However, supplied dietary sodium selenite could increase the relative weight of thymus and percentages of mature thymocytes, and alleviate histopathological lesions. Compared with AFB1 group, the percentages of apoptotic thymocytes detected by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling method and flow cytometry method in three +Se groups were decreased, the expression of Caspase-3 and Bax, through quantitative real-time PCR and immunohistochemical method, in three +Se groups were decreased, while the expression of Bcl-2 was increased. The results indicate that sodium selenite supplied in the diet, through a mechanism of apoptosis regulation, may ameliorated AFB₁-induced lesions of thymus and accordingly improve the impaired cellular immune function.
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Affiliation(s)
- Kejie Chen
- Key Laboratory of Animal Diseases and Environmental Hazards of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Ya'an, Sichuan 625014, China
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Huq NL, Seers CA, Toh ECY, Dashper SG, Slakeski N, Zhang L, Ward BR, Meuric V, Chen D, Cross KJ, Reynolds EC. Propeptide-mediated inhibition of cognate gingipain proteinases. PLoS One 2013; 8:e65447. [PMID: 23762374 PMCID: PMC3677877 DOI: 10.1371/journal.pone.0065447] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 04/24/2013] [Indexed: 12/31/2022] Open
Abstract
Porphyromonas gingivalis is a major pathogen associated with chronic periodontitis. The organism’s cell-surface cysteine proteinases, the Arg-specific proteinases (RgpA, RgpB) and the Lys-specific proteinase (Kgp), which are known as gingipains have been implicated as major virulence factors. All three gingipain precursors contain a propeptide of around 200 amino acids in length that is removed during maturation. The aim of this study was to characterize the inhibitory potential of the Kgp and RgpB propeptides against the mature cognate enzymes. Mature Kgp was obtained from P. gingivalis mutant ECR368, which produces a recombinant Kgp with an ABM1 motif deleted from the catalytic domain (rKgp) that enables the otherwise membrane bound enzyme to dissociate from adhesins and be released. Mature RgpB was obtained from P. gingivalis HG66. Recombinant propeptides of Kgp and RgpB were produced in Escherichia coli and purified using nickel-affinity chromatography. The Kgp and RgpB propeptides displayed non-competitive inhibition kinetics with Ki values of 2.04 µM and 12 nM, respectively. Both propeptides exhibited selectivity towards their cognate proteinase. The specificity of both propeptides was demonstrated by their inability to inhibit caspase-3, a closely related cysteine protease, and papain that also has a relatively long propeptide. Both propeptides at 100 mg/L caused a 50% reduction of P. gingivalis growth in a protein-based medium. In summary, this study demonstrates that gingipain propeptides are capable of inhibiting their mature cognate proteinases.
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Affiliation(s)
- N. Laila Huq
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Christine A. Seers
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Elena C. Y. Toh
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Stuart G. Dashper
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Nada Slakeski
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Lianyi Zhang
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Brent R. Ward
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Vincent Meuric
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Dina Chen
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Keith J. Cross
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Eric C. Reynolds
- Oral Health Cooperative Research Centre, Melbourne Dental School, Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
- * E-mail:
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Sahu BD, Kuncha M, Sindhura GJ, Sistla R. Hesperidin attenuates cisplatin-induced acute renal injury by decreasing oxidative stress, inflammation and DNA damage. Phytomedicine 2013; 20:453-460. [PMID: 23353054 DOI: 10.1016/j.phymed.2012.12.001] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Revised: 11/15/2012] [Accepted: 12/15/2012] [Indexed: 06/01/2023]
Abstract
Nephrotoxicity is an important complication in cancer patients undergoing cisplatin therapy. Oxidative stress, inflammation and apoptosis/necrosis are the major patho-mechanisms of cisplatin induced nephrotoxicity. In the present study, hesperidin, a naturally-occurring bioflavonoid has been demonstrated to have protective effect on cisplatin-induced renal injury in rats. Cisplatin intoxication resulted in structural and functional renal impairment which was revealed by massive histopathological changes and elevated blood urea nitrogen and serum creatinine levels, respectively. Renal injury was associated with oxidative stress/lipid peroxidation as evident by increased reactive oxygen species (ROS) and malondialdehyde (MDA) formation with decreased levels of antioxidants such as reduced glutathione, vitamin C, catalase, superoxide dismutase, glutathione reductase, glutathione peroxidase and glutathione-S-transferase. Cisplatin administration also triggered inflammatory response in rat kidneys by inducing pro-inflammatory cytokine, TNF-α, with the increased expression of myeloperoxidase (MPO). Furthermore, cisplatin increased the activity of caspase-3 and DNA damage with decreased tissue nitric oxide levels. Hesperidin treatment significantly attenuated the cisplatin-induced oxidative stress/lipid peroxidation, inflammation (infiltration of leukocytes and pro-inflammatory cytokine), apoptosis/necrosis (caspase-3 activity with DNA damage) as well as increased expression of nitric oxide in the kidney and improved renal function. Thus, our results suggest that hesperidin co-administration may serve as a novel and promising preventive strategy against cisplatin-induced nephrotoxicity.
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Affiliation(s)
- Bidya Dhar Sahu
- Pharmacology Division, Indian Institute of Chemical Technology, Hyderabad, India
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Elvitigala DAS, Whang I, Premachandra HKA, Umasuthan N, Oh MJ, Jung SJ, Yeo SY, Lim BS, Lee JH, Park HC, Lee J. Caspase 3 from rock bream (Oplegnathus fasciatus): genomic characterization and transcriptional profiling upon bacterial and viral inductions. Fish Shellfish Immunol 2012; 33:99-110. [PMID: 22554851 DOI: 10.1016/j.fsi.2012.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 03/31/2012] [Accepted: 04/16/2012] [Indexed: 05/31/2023]
Abstract
Caspase 3 is a prominent mediator of apoptosis and participates in the cell death signaling cascade. In this study, caspase 3 was identified (Rbcasp3) and characterized from rock bream (Oplegnathus fasciatus). The full-length cDNA of Rbcasp3 is 2683 bp and contains an open reading frame of 849 bp, which encodes a 283 amino acid protein with a calculated molecular mass of 31.2 kDa and isoelectric point of 6.31. The amino acid sequence resembles the conventional caspase 3 domain architecture, including crucial amino acid residues in the catalytic site and binding pocket. The genomic length of Rbcasp3 is 7529 bp, and encompasses six exons interrupted by five introns. Phylogenetic analysis affirmed that Rbcasp3 represents a complex group in fish that has been shaped by gene duplication and diversification. Many putative transcription factor binding sites were identified in the predicted promoter region of Rbcasp3, including immune factor- and cancer signal-inducible sites. Rbcasp3, excluding the pro-domain, was expressed in Escherichia coli. The recombinant protein showed a detectable activity against the mammalian caspase 3/7-specific substrate DEVD-pNA, indicating a functional role in physiology. Quantitative real time PCR assay detected Rbcasp3 expression in all examined tissues, but with high abundance in blood, liver and brain. Transcriptional profiling of rock bream liver tissue revealed that challenge with lipopolysaccharides (LPS) caused prolonged up-regulation of Rbcasp3 mRNA whereas, Edwardsiella tarda (E. tarda) stimulated a late-phase significant transcriptional response. Rock bream iridovirus (RBIV) up-regulated Rbcasp3 transcription significantly at late-phase, however polyinosinic-polycytidylic acid (poly(I:C)) induced Rbcasp3 significantly at early-phase. Our findings suggest that Rbcasp3 functions as a cysteine-aspartate-specific protease and contributes to immune responses against bacterial and viral infections.
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Affiliation(s)
- Don Anushka Sandaruwan Elvitigala
- Department of Marine Life Sciences, School of Marine Biomedical Sciences, Jeju National University, Jeju Self-Governing Province 690-756, Republic of Korea
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Park SJ, Kim KJ, Kim WU, Oh IH, Cho CS. Involvement of endoplasmic reticulum stress in homocysteine-induced apoptosis of osteoblastic cells. J Bone Miner Metab 2012; 30:474-84. [PMID: 22222420 DOI: 10.1007/s00774-011-0346-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 12/13/2011] [Indexed: 11/28/2022]
Abstract
Hyperhomocysteinemia has been shown to increase the incidence of osteoporosis and osteoporotic fractures. Endoplasmic reticulum (ER) stress was recently shown to be associated with apoptosis in several types of cells. In this study, we determined the effect of homocysteine (Hcy) on the apoptosis of osteoblastic cells and investigated whether ER stress participates in Hcy-induced osteoblast apoptosis. Human osteoblastic cells were incubated with Hcy. Hcy dose-dependently decreased cell viability and increased apoptosis in osteoblastic cells. Osteoblastic cells are more susceptible to Hcy-mediated cell death than other cell types. Expression of cleaved caspase-3 was significantly increased by Hcy, and pretreatment with caspase-3 inhibitor rescued the cell viability by Hcy. Hcy treatment led to an increase in release of mitochondrial cytochrome c. It also triggered ER stress by increased expression of glucose-regulated protein 78, inositol-requiring transmembrane kinase and endonuclease 1α (IRE-1α), spliced X-box binding protein, activating transcription factor 4, and C/EBP homologous protein. Silencing IRE-1α expression by small interfering RNA effectively suppressed Hcy-induced apoptosis of osteoblastic cells. Our results suggest that hyperhomocysteinemia induces apoptotic cell death in osteoblasts via ER stress.
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Affiliation(s)
- Su-Jung Park
- Division of Rheumatology, Department of Internal Medicine, College of Medicine, Yeouido St. Mary's Hospital, The Catholic University of Korea, #62 Yeouido-dong, Yeongdeungpo-ku, Seoul, South Korea
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50
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Bogojevic D, Chamberlain MD, Barbulovic-Nad I, Wheeler AR. A digital microfluidic method for multiplexed cell-based apoptosis assays. Lab Chip 2012; 12:627-34. [PMID: 22159547 DOI: 10.1039/c2lc20893h] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Digital microfluidics (DMF), a fluid-handling technique in which picolitre-microlitre droplets are manipulated electrostatically on an array of electrodes, has recently become popular for applications in chemistry and biology. DMF devices are reconfigurable, have no moving parts, and are compatible with conventional high-throughput screening infrastructure (e.g., multiwell plate readers). For these and other reasons, digital microfluidics has been touted as being a potentially useful new tool for applications in multiplexed screening. Here, we introduce the first digital microfluidic platform used to implement parallel-scale cell-based assays. A fluorogenic apoptosis assay for caspase-3 activity was chosen as a model system because of the popularity of apoptosis as a target for anti-cancer drug discovery research. Dose-response profiles of caspase-3 activity as a function of staurosporine concentration were generated using both the digital microfluidic method and conventional techniques (i.e., pipetting, aspiration, and 96-well plates.) As expected, the digital microfluidic method had a 33-fold reduction in reagent consumption relative to the conventional technique. Although both types of methods used the same detector (a benchtop multiwell plate reader), the data generated by the digital microfluidic method had lower detection limits and greater dynamic range because apoptotic cells were much less likely to de-laminate when exposed to droplet manipulation by DMF relative to pipetting/aspiration in multiwell plates. We propose that the techniques described here represent an important milestone in the development of digital microfluidics as a useful tool for parallel cell-based screening and other applications.
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Affiliation(s)
- Dario Bogojevic
- Institute for Biomaterials and Biomedical Engineering, University of Toronto, 164 College St., Toronto, ON M5S 3G9, Canada
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