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El Riz A, Tchoumi Neree A, Mousavifar L, Roy R, Chorfi Y, Mateescu MA. Metallo-Glycodendrimeric Materials against Enterotoxigenic Escherichia coli. Microorganisms 2024; 12:966. [PMID: 38792795 PMCID: PMC11124148 DOI: 10.3390/microorganisms12050966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/02/2024] [Accepted: 05/09/2024] [Indexed: 05/26/2024] Open
Abstract
Conjugation of carbohydrates to nanomaterials has been extensively studied and recognized as an alternative in the biomedical field. Dendrimers synthesized with mannose at the end group and with entrapped zero-valent copper/silver could be a potential candidate against bacterial proliferation. This study is aimed at investigating the bactericidal activity of metal-glycodendrimers. The Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) reaction was used to synthesize a new mannosylated dendrimer containing 12 mannopyranoside residues in the periphery. The enterotoxigenic Escherichia coli fimbriae 4 (ETEC:F4) viability, measured at 600 nm, showed the half-inhibitory concentration (IC50) of metal-free glycodendrimers (D), copper-loaded glycodendrimers (D:Cu) and silver-loaded glycodendrimers (D:Ag) closed to 4.5 × 101, 3.5 × 101 and to 1.0 × 10-2 µg/mL, respectively, and minimum inhibitory concentration (MIC) of D, D:Cu and D:Ag of 2.0, 1.5 and 1.0 × 10-4 µg/mL, respectively. The release of bacteria contents onto broth and the inhibition of ETEC:F4 biofilm formation increased with the number of metallo-glycodendrimer materials, with a special interest in silver-containing nanomaterial, which had the highest activity, suggesting that glycodendrimer-based materials interfered with bacteria-bacteria or bacteria-polystyrene interactions, with bacteria metabolism and can disrupt bacteria cell walls. Our findings identify metal-mannose-dendrimers as potent bactericidal agents and emphasize the effect of entrapped zero-valent metal against ETEC:F4.
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Affiliation(s)
- Aly El Riz
- Department of Chemistry, Université du Québec à Montréal, Succ. Centre-Ville, P.O. Box 8888, Montréal, QC H3C 3P8, Canada; (A.E.R.); (L.M.); (R.R.)
| | - Armelle Tchoumi Neree
- Department of Veterinary Biomedicine Sciences, Faculty of Veterinary Medicine, Université de Montréal, St-Hyacinthe, QC J2S 2M2, Canada; (A.T.N.); (Y.C.)
- Centre de recherche en infectiologie porcine et avicole (CRIPA), Université de Montréal, St-Hyacinthe, QC J2S 2M2, Canada
| | - Leila Mousavifar
- Department of Chemistry, Université du Québec à Montréal, Succ. Centre-Ville, P.O. Box 8888, Montréal, QC H3C 3P8, Canada; (A.E.R.); (L.M.); (R.R.)
| | - René Roy
- Department of Chemistry, Université du Québec à Montréal, Succ. Centre-Ville, P.O. Box 8888, Montréal, QC H3C 3P8, Canada; (A.E.R.); (L.M.); (R.R.)
| | - Younes Chorfi
- Department of Veterinary Biomedicine Sciences, Faculty of Veterinary Medicine, Université de Montréal, St-Hyacinthe, QC J2S 2M2, Canada; (A.T.N.); (Y.C.)
- Centre de recherche en infectiologie porcine et avicole (CRIPA), Université de Montréal, St-Hyacinthe, QC J2S 2M2, Canada
| | - Mircea Alexandru Mateescu
- Department of Chemistry, Université du Québec à Montréal, Succ. Centre-Ville, P.O. Box 8888, Montréal, QC H3C 3P8, Canada; (A.E.R.); (L.M.); (R.R.)
- Centre de recherche en infectiologie porcine et avicole (CRIPA), Université de Montréal, St-Hyacinthe, QC J2S 2M2, Canada
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Mathews PD, Gama GS, Megiati HM, Madrid RRM, Garcia BBM, Han SW, Itri R, Mertins O. Flavonoid-Labeled Biopolymer in the Structure of Lipid Membranes to Improve the Applicability of Antioxidant Nanovesicles. Pharmaceutics 2024; 16:141. [PMID: 38276511 PMCID: PMC10819309 DOI: 10.3390/pharmaceutics16010141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/15/2024] [Accepted: 01/17/2024] [Indexed: 01/27/2024] Open
Abstract
Nanovesicles produced with lipids and polymers are promising devices for drug and bioactive delivery and are of great interest in pharmaceutical applications. These nanovesicles can be engineered for improvement in bioavailability, patient compliance or to provide modified release or enhanced delivery. However, their applicability strongly depends on the safety and low immunogenicity of the components. Despite this, the use of unsaturated lipids in nanovesicles, which degrade following oxidation processes during storage and especially during the proper routes of administration in the human body, may yield toxic degradation products. In this study, we used a biopolymer (chitosan) labeled with flavonoid (catechin) as a component over a lipid bilayer for micro- and nanovesicles and characterized the structure of these vesicles in oxidation media. The purpose of this was to evaluate the in situ effect of the antioxidant in three different vesicular systems of medium, low and high membrane curvature. Liposomes and giant vesicles were produced with the phospholipids DOPC and POPC, and crystalline cubic phase with monoolein/DOPC. Concentrations of chitosan-catechin (CHCa) were included in all the vesicles and they were challenged in oxidant media. The cytotoxicity analysis using the MTT assay (3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide) revealed that concentrations of CHCa below 6.67 µM are non-toxic to HeLa cells. The size and zeta potential of the liposomes evidenced the degradation of their structures, which was minimized by CHCa. Similarly, the membrane of the giant vesicle, which rapidly deteriorated in oxidative solution, was protected in the presence of CHCa. The production of a lipid/CHCa composite cubic phase revealed a specific cubic topology in small-angle X-ray scattering, which was preserved in strong oxidative media. This study demonstrates the specific physicochemical characteristics introduced in the vesicular systems related to the antioxidant CHCa biopolymer, representing a platform for the improvement of composite nanovesicle applicability.
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Affiliation(s)
- Patrick D. Mathews
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
- Institute of Biosciences, Sao Paulo State University, Botucatu 18618-689, Brazil
| | - Gabriella S. Gama
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
| | - Hector M. Megiati
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
| | - Rafael R. M. Madrid
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
| | - Bianca B. M. Garcia
- Interdisciplinary Center for Gene Therapy, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (B.B.M.G.); (S.W.H.)
| | - Sang W. Han
- Interdisciplinary Center for Gene Therapy, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (B.B.M.G.); (S.W.H.)
| | - Rosangela Itri
- Applied Physics Department, Institute of Physics, University of Sao Paulo, Sao Paulo 05508-900, Brazil;
| | - Omar Mertins
- Laboratory of Nano Bio Materials (LNBM), Department of Biophysics, Paulista Medical School, Federal University of Sao Paulo, Sao Paulo 04023-062, Brazil; (P.D.M.); (G.S.G.); (H.M.M.); (R.R.M.M.)
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Pino-Sandoval DA, Cantú-Cárdenas ME, Rodríguez-González V, Patrón-Soberano OA, Rosas-Castor JM, Murillo-Sierra JC, Hernández-Ramírez A. Solar heterogeneous photo-Fenton for complete inactivation of Escherichia coli and Salmonella typhimurium in secondary-treated wastewater effluent. CHEMOSPHERE 2023; 342:140132. [PMID: 37690560 DOI: 10.1016/j.chemosphere.2023.140132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 08/17/2023] [Accepted: 09/07/2023] [Indexed: 09/12/2023]
Abstract
In this work, complete elimination of Escherichia coli and Salmonella typhimurium was achieved in 120 min using a heterogeneous photo-Fenton process under sunlight at pH 6.5 in distilled water. A face-centered composite central design 22 with one categoric factor and three replicates at the central point was used to evaluate the effect of iron (III) oxide concentration (0.8-3.4 mg L-1), H2O2 (2-10 mg L-1), and the type of iron oxide phase (maghemite and hematite) on the inactivation of both bacteria. The results showed that the amount of catalyst, H2O2 concentration and their interaction were significant factors (p < 0.05) in the elimination of the microorganisms. Thus, under the best conditions (3.4 mg L-1 of iron (III) oxide and 10 mg L-1 of H2O2) in the experimental ranges, complete inactivation of E. coli and S. typhimurium was achieved (6-log reduction) in 120 min using the photo-Fenton treatment with both iron-oxide phases. Furthermore, the photocatalytic elimination of both bacteria by the photo-Fenton process using hematite and maghemite in secondary-treated wastewater effluent was performed obtaining slower inactivation rates (1.2-5.9 times) than in distilled water due to the matrix effect of the effluent from a wastewater treatment plant. Nevertheless, the process continued to be effective in the effluent, achieving complete bacterial elimination in 150 min using the hematite phase. Additionally, the SEM images of the bacterial cells showed that the heterogeneous photo-Fenton treatment generated permanent and irreversible cell damage, resulting in complete cell death.
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Affiliation(s)
- Diego A Pino-Sandoval
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico; Universidad Politécnica de Apodaca, Av. Politécnica No. 2331, El Barretal, Apodaca, C. P. 66600, Nuevo León, Mexico
| | - M Elena Cantú-Cárdenas
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico
| | - Vicente Rodríguez-González
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, División de Materiales Avanzados, Camino a La Presa San José 2055, Lomas 4a. Sección, 78216, San Luis Potosí, S.L.P., Mexico
| | - O Araceli Patrón-Soberano
- IPICyT, Instituto Potosino de Investigación Científica y Tecnológica, División de Biología Molecular, División de Materiales Avanzados, Camino a La Presa San José 2055, Lomas 4a. Sección, 78216, San Luis Potosí, S.L.P., Mexico
| | - J Martín Rosas-Castor
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico
| | - J Camilo Murillo-Sierra
- Facultad de Ciencias Químicas, Universidad de Concepción, Edmundo Larenas 129, Concepción, Chile
| | - Aracely Hernández-Ramírez
- Universidad Autónoma de Nuevo León, Facultad de Ciencias Químicas, Cd. Universitaria, San Nicolás de Los Garza, C.P. 66455, Nuevo León, Mexico.
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Chiang YF, Lin IC, Huang KC, Chen HY, Ali M, Huang YJ, Hsia SM. Caffeic acid's role in mitigating polycystic ovary syndrome by countering apoptosis and ER stress triggered by oxidative stress. Biomed Pharmacother 2023; 166:115327. [PMID: 37619480 DOI: 10.1016/j.biopha.2023.115327] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 08/26/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is a complex endocrine disorder that affects women of reproductive age, characterized by androgen-induced oxidative stress leading to several metabolic disorders. In this study, we investigated the potential therapeutic effect of caffeic acid on PCOS and its underlying molecular mechanism. We used a human ovarian granulosa cell line (KGN cells) induced by hydrogen peroxide (H2O2) to examine how caffeic acid influences the protein expression of oxidative stress-induced apoptosis-related markers. Our results indicate that caffeic acid significantly inhibits intracellular reactive oxygen species (ROS) generation and safeguards KGN cells against oxidative stress. For the in vivo aspect of our study, female Sprague-Dawley (SD) rats were utilized to induce the PCOS model using dehydroepiandrosterone (DHEA). Caffeic acid was then administered to the rats for a duration of 6 weeks. The outcomes revealed that caffeic acid effectively improved irregular estrous cycles, fasting blood glucose levels, liver function, and lipid profiles in DHEA-induced PCOS rats. Additionally, it mitigated hyperandrogenism, enhanced steroidogenesis enzyme expression, and modulated apoptosis-related protein expression. Our findings strongly suggest that caffeic acid holds promising potential in reducing oxidative stress-induced damage and ameliorating PCOS-related complications by modulating ER stress.
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Affiliation(s)
- Yi-Fen Chiang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan
| | - I-Cheng Lin
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan
| | - Ko-Chieh Huang
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan
| | - Hsin-Yuan Chen
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan
| | - Mohamed Ali
- Clinical Pharmacy Department, Faculty of Pharmacy, Ain Shams University, 11566 Cairo, Egypt; Deaprtment of Obstertrics and Gynecology, University of Chicago, 60637 Chicago, IL, USA
| | - Yun-Ju Huang
- Department of Biotechnology and Food Technology, Southern Taiwan University of Science and Technology, Tainan City 710301, Taiwan
| | - Shih-Min Hsia
- School of Nutrition and Health Sciences, College of Nutrition, Taipei Medical University, Taipei 11031, Taiwan; Graduate Institute of Metabolism and Obesity Sciences, Taipei Medical University, Taipei 11031, Taiwan; School of Food and Safety, Taipei Medical University, Taipei 11031, Taiwan; Nutrition Research Center, Taipei Medical University Hospital, Taipei 11031, Taiwan; TMU Research Center for Digestive Medicine, Taipei Medical University, Taipei 11031, Taiwan.
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Aguiar TKB, Mesquita FP, Neto NAS, Gomes FÍR, Freitas CDT, Carneiro RF, Nagano CS, Alencar LMR, Santos-Oliveira R, Oliveira JTA, Souza PFN. No Chance to Survive: Mo-CBP 3-PepII Synthetic Peptide Acts on Cryptococcus neoformans by Multiple Mechanisms of Action. Antibiotics (Basel) 2023; 12:antibiotics12020378. [PMID: 36830289 PMCID: PMC9952340 DOI: 10.3390/antibiotics12020378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/09/2023] [Accepted: 02/10/2023] [Indexed: 02/15/2023] Open
Abstract
Multidrug-resistant Cryptococcus neoformans is an encapsulated yeast causing a high mortality rate in immunocompromised patients. Recently, the synthetic peptide Mo-CBP3-PepII emerged as a potent anticryptococcal molecule with an MIC50 at low concentration. Here, the mechanisms of action of Mo-CBP3-PepII were deeply analyzed to provide new information about how it led C. neoformans cells to death. Light and fluorescence microscopies, analysis of enzymatic activities, and proteomic analysis were employed to understand the effect of Mo-CBP3-PepII on C. neoformans cells. Light and fluorescence microscopies revealed Mo-CBP3-PepII induced the accumulation of anion superoxide and hydrogen peroxide in C. neoformans cells, in addition to a reduction in the activity of superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT) in the cells treated with Mo-CBP3-PepII. In the presence of ascorbic acid (AsA), no reactive oxygen species (ROS) were detected, and Mo-CBP3-PepII lost the inhibitory activity against C. neoformans. However, Mo-CBP3-PepII inhibited the activity of lactate dehydrogenase (LDH) ergosterol biosynthesis and induced the decoupling of cytochrome c (Cyt c) from the mitochondrial membrane. Proteomic analysis revealed a reduction in the abundance of proteins related to energetic metabolism, DNA and RNA metabolism, pathogenicity, protein metabolism, cytoskeleton, and cell wall organization and division. Our findings indicated that Mo-CBP3-PepII might have multiple mechanisms of action against C. neoformans cells, mitigating the development of resistance and thus being a potent molecule to be employed in the production of new drugs against C. neoformans infections.
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Affiliation(s)
- Tawanny K. B. Aguiar
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Felipe P. Mesquita
- Drug Research and Development Center, Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza 60430-275, CE, Brazil
| | - Nilton A. S. Neto
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Francisco Í. R. Gomes
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Cleverson D. T. Freitas
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Rômulo F. Carneiro
- Department of Fisheries Engineering, Federal University of Ceará (UFC), Fortaleza 60451-970, CE, Brazil
| | - Celso S. Nagano
- Department of Fisheries Engineering, Federal University of Ceará (UFC), Fortaleza 60451-970, CE, Brazil
| | - Luciana M. R. Alencar
- Laboratory of Biophysics and Nanosystems, Physics Department, Federal University of Maranhão, São Luís 65080-805, MA, Brazil
| | - Ralph Santos-Oliveira
- Brazilian Nuclear Energy Commission, Nuclear Engineering Institute, Rio de Janeiro 21941-906, RJ, Brazil
- Laboratory of Nanoradiopharmacy, Rio de Janeiro State University, Rio de Janeiro 23070-200, RJ, Brazil
| | - Jose T. A. Oliveira
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
| | - Pedro F. N. Souza
- Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza 60451-970, CE, Brazil
- Drug Research and Development Center, Department of Physiology and Pharmacology, Federal University of Ceará, Fortaleza 60430-275, CE, Brazil
- Correspondence: or
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Behind the Curtain: In Silico and In Vitro Experiments Brought to Light New Insights into the Anticryptococcal Action of Synthetic Peptides. Antibiotics (Basel) 2023; 12:antibiotics12010153. [PMID: 36671354 PMCID: PMC9854638 DOI: 10.3390/antibiotics12010153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/08/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Cryptococcus neoformans is the pathogen responsible for cryptococcal pneumonia and meningitis, mainly affecting patients with suppressed immune systems. We have previously revealed the mechanism of anticryptococcal action of synthetic antimicrobial peptides (SAMPs). In this study, computational and experimental analyses provide new insights into the mechanisms of action of SAMPs. Computational analysis revealed that peptides interacted with the PHO36 membrane receptor of C. neoformans. Additionally, ROS (reactive oxygen species) overproduction, the enzymes of ROS metabolism, interference in the ergosterol biosynthesis pathway, and decoupling of cytochrome c mitochondrial membrane were evaluated. Three of four peptides were able to interact with the PHO36 receptor, altering its function and leading to ROS overproduction. SAMPs-treated C. neoformans cells showed a decrease in scavenger enzyme activity, supporting ROS accumulation. In the presence of ascorbic acid, an antioxidant agent, SAMPs did not induce ROS accumulation in C. neoformans cells. Interestingly, two SAMPs maintained inhibitory activity and membrane pore formation in C. neoformans cells by a ROS-independent mechanism. Yet, the ergosterol biosynthesis and lactate dehydrogenase activity were affected by SAMPs. In addition, we noticed decoupling of Cyt c from the mitochondria, which led to apoptosis events in the cryptococcal cells. The results presented herein suggest multiple mechanisms imposed by SAMPs against C. neoformans interfering in the development of resistance, thus revealing the potential of SAMPs in treating infections caused by C. neoformans.
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Ganeshkar MP, Mirjankar MR, Shivappa P, Gaddigal AT, Goder PH, Kamanavalli CM. Biogenic synthesis of selenium nanoparticles, characterization and screening of therapeutic applications using Averrhoa carambola leaf extract. PARTICULATE SCIENCE AND TECHNOLOGY 2023. [DOI: 10.1080/02726351.2023.2164876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | | | - Parashuram Shivappa
- P. G. Department of Studies in Biochemistry, Karnatak University, Dharwad, India
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Rodrigues-Silva F, V M Starling MC, Amorim CC. Challenges on solar oxidation as post-treatment of municipal wastewater from UASB systems: Treatment efficiency, disinfection and toxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 850:157940. [PMID: 35952890 PMCID: PMC9554792 DOI: 10.1016/j.scitotenv.2022.157940] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 08/05/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
The application of solar photo-Fenton as post-treatment of municipal secondary effluents (MSE) in developing tropical countries is the main topic of this review. Alternative technologies such as stabilization ponds and upflow anaerobic sludge blanket (UASB) are vastly applied in these countries. However, data related to the application of solar photo-Fenton to improve the quality of effluents from UASB systems are scarce. This review gathered main achievements and limitations associated to the application of solar photo-Fenton at neutral pH and at pilot scale to analyze possible challenges associated to its application as post-treatment of MSE generated by alternative treatments. To this end, the literature review considered studies published in the last decade focusing on CECs removal, toxicity reduction and disinfection via solar photo-Fenton. Physicochemical characteristics of effluents originated after UASB systems alone and followed by a biological post-treatment show significant difference when compared with effluents from conventional activated sludge (CAS) systems. Results obtained for solar photo-Fenton as post-treatment of MSE in developed countries indicate that remaining organic matter and alkalinity present in UASB effluents may pose challenges to the performance of solar advanced oxidation processes (AOPs). This drawback could result in a more toxic effluent. The use of chelating agents such as Fe3+-EDDS to perform solar photo-Fenton at neutral pH was compared to the application of intermittent additions of Fe2+ and both of these strategies were reported as effective to remove CECs from MSE. The latter strategy may be of greater interest in developing countries due to costs associated to complexing agents. In addition, more studies are needed to confirm the efficiency of solar photo-Fenton on the disinfection of effluent from UASB systems to verify reuse possibilities. Finally, future research urges to evaluate the efficiency of solar photo-Fenton at natural pH for the treatment of effluents from UASB systems.
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Affiliation(s)
- Fernando Rodrigues-Silva
- Research Group on Environmental Applications of Advanced Oxidation Processes, Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Maria Clara V M Starling
- Research Group on Environmental Applications of Advanced Oxidation Processes, Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Camila C Amorim
- Research Group on Environmental Applications of Advanced Oxidation Processes, Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Antônio Carlos, 6627, Belo Horizonte, Minas Gerais 31270-901, Brazil.
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Survival and Neurogenesis-Promoting Effects of the Co-Overexpression of BCLXL and BDNF Genes on Wharton’s Jelly-Derived Mesenchymal Stem Cells. Life (Basel) 2022; 12:life12091406. [PMID: 36143442 PMCID: PMC9501059 DOI: 10.3390/life12091406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 09/05/2022] [Accepted: 09/07/2022] [Indexed: 12/02/2022] Open
Abstract
The main problem with using MSC (mesenchymal stem cells) to treat the deficient diseases of the central nervous system is the low cell survival rate after the transplant procedure and their low ability to spontaneously differentiate into functional neurons. The aim of this study was to investigate the effects of genetically modifying MSC. A co-overexpression of two genes was performed: BCLXL was supposed to increase the resistance of the cells to the toxic agents and BDNF was supposed to direct cells into the neuronal differentiation pathway. As a result, it was possible to obtain the functional overexpression of the BCLXL and BDNF genes. These cells had an increased resistance to apoptosis-inducing toxicants (staurosporine, doxorubicin and H2O2). At the same time, the genes of the neuronal pathway (CHAT, TPH1) were overexpressed. The genetically modified MSC increased the survival rate under toxic conditions, which increased the chance of surviving a transplant procedure. The obtained cells can be treated as neural cell progenitors, which makes them a universal material that can be used in various disease models. The production of neurotransmitters suggests that cells transplanted into the brain and subjected to the additional influence of the brain’s microenvironment, will be able to form synapses and become functional neurons.
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Blanco-Canella P, Lama G, Sanromán MA, Pazos M. Disinfection through Advance Oxidation Processes: Optimization and Application on Real Wastewater Matrices. TOXICS 2022; 10:512. [PMID: 36136477 PMCID: PMC9501268 DOI: 10.3390/toxics10090512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/19/2022] [Accepted: 08/25/2022] [Indexed: 06/16/2023]
Abstract
Disinfection is an essential and significant process for water treatment to protect the environment and human beings from pathogenic infections. In this study, disinfection through the generation of hydroxyl (Fenton process (FP)) and sulfate (Fenton-like process (FLP)) radicals was validated and optimized. The optimization was carried out in synthetic water through an experimental design methodology using the bacteria Escherichia coli as a model microorganism. Different variables were evaluated in both processes: precursor concentration (peroxymonosulfate (PMS) and H2O2), catalyst concentration (Fe+2), and pH in the Fenton process. After that, the optimized conditions (FP: 132.36 mM H2O2, 0.56 mM Fe+2 and 3.26 pH; FLP: 3.82 mM PMS and 0.40 mM Fe+2) were applied to real matrices from wastewater treatment plants. The obtained results suggest that both processes are promising for disinfection due to the high oxidant power of hydroxyl and sulfate radicals.
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Ganeshkar MP, Goder PH, Mirjankar MR, Gaddigal AT, Shivappa P, Kamanavalli CM. Characterization and screening of anticancer properties of cerium oxide nanoparticles synthesized using Averrhoa carambola plant extract. INORG NANO-MET CHEM 2022. [DOI: 10.1080/24701556.2022.2077374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | | | | | | | - Parashuram Shivappa
- P. G. Department of Studies in Biochemistry, Karnatak University, Dharwad, India
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Enhancing the Productivity and Stability of Superoxide Dismutase from Saccharomyces cerevisiae TBRC657 and Its Application as a Free Radical Scavenger. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8040169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Superoxide dismutase (SOD) is crucial antioxidant enzyme that plays a role in protecting cells against harmful reactive oxygen species (ROS) which are generated inside cells. Due to its functionality, SOD is used in many applications. In this study, Saccharomyces cerevisiae TBRC657 was selected as the SOD producer due to its high SOD production. After investigating an optimized medium, the major components were found to be molasses and yeast extract, which improved SOD production up to 3.97-fold compared to a synthetic medium. In addition, the optimized medium did not require any induction, which makes it suitable for applications in large-scale production. The SOD formulation was found to increase the stability of the conformational structure and prolong shelf-life. The results show that 1.0% (w/w) trehalose was the best additive, in giving the highest melting temperature by the DSF method and maintaining its activity at more than 80% after storage for 6 months. The obtained SOD was investigated for its cytotoxicity and ROS elimination against fibroblast cells. The results indicate that the SOD enhanced the proliferation and controlled ROS level inside the cells. Thus, the SOD obtained from S. cerevisiae TBRC657 cultured in the optimized medium could be a candidate for use as a ROS scavenger, which can be applied in many industries.
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Fidan H, Esatbeyoglu T, Simat V, Trif M, Tabanelli G, Kostka T, Montanari C, Ibrahim SA, Özogul F. Recent developments of lactic acid bacteria and their metabolites on foodborne pathogens and spoilage bacteria: Facts and gaps. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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14
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Kim MK, Choi YC, Cho SH, Choi JS, Cho YW. The Antioxidant Effect of Small Extracellular Vesicles Derived from Aloe vera Peels for Wound Healing. Tissue Eng Regen Med 2021; 18:561-571. [PMID: 34313971 PMCID: PMC8325744 DOI: 10.1007/s13770-021-00367-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 06/15/2021] [Accepted: 06/15/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Extracellular vesicles (EVs) derived from plants have emerged as potential candidates for cosmetic and therapeutic applications. In this study, we isolated EVs from Aloe vera peels (A-EVs) and investigated the antioxidant and wound healing potential of A-EVs. METHODS A-EVs were isolated by ultracentrifugation and tangential flow filtration and were characterized using transmission electron microscopy, nanoparticle tracking analysis. The cytotoxicity and cellular uptake of A-EVs were investigated by WST-1 assay and flow cytometry. The antioxidant effect of A-EVs was evaluated by superoxide dismutase (SOD) activity assay and cellular antioxidant activity (CAA) assay. The wound healing potential was assessed by in vitro scratch assay using human keratinocytes (HaCaT) and fibroblasts (HDF). The expression of nuclear factor erythroid 2-related factor 2 (Nrf2) and their associated genes was analyzed by quantitative RT-PCR. RESULTS A-EVs displayed a round shape and had diameters from 50 to 200 nm. A-EVs showed good cytocompatibility on human skin cells and were internalized into HaCaT cells via clathrin-, caveolae-mediated endocytosis, and membrane fusion. The SOD activity and CAA assays exhibited that A-EVs had antioxidant activity and reduced intracellular ROS levels in H2O2-treated HaCaT cells in a dose-dependent manner. A scratch assay showed that A-EVs enhanced the migration ability of HaCaT and HDF. Moreover, A-EVs significantly upregulated the mRNA expression of Nrf2, HO-1, CAT, and SOD genes in H2O2-treated HaCaT cells. Our findings reveal that A-EVs could activate the antioxidant defense mechanisms and wound healing process via the Nrf2 activation. CONCLUSION Overall results suggest that the A-EVs are promising as a potential agent for skin regeneration.
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Affiliation(s)
- Min Kang Kim
- Exostemtech Inc., Education Research Industry Collaboration Complex (ERICC), Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Republic of Korea
| | - Young Chan Choi
- Exostemtech Inc., Education Research Industry Collaboration Complex (ERICC), Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Republic of Korea
| | - Seung Hee Cho
- Exostemtech Inc., Education Research Industry Collaboration Complex (ERICC), Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Republic of Korea
| | - Ji Suk Choi
- Exostemtech Inc., Education Research Industry Collaboration Complex (ERICC), Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Republic of Korea.
| | - Yong Woo Cho
- Exostemtech Inc., Education Research Industry Collaboration Complex (ERICC), Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Republic of Korea.
- Department of Materials Science and Chemical Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, 15588, Republic of Korea.
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Chen YD, Duan X, Zhou X, Wang R, Wang S, Ren NQ, Ho SH. Advanced oxidation processes for water disinfection: Features, mechanisms and prospects. CHEMICAL ENGINEERING JOURNAL 2021. [PMID: 0 DOI: 10.1016/j.cej.2020.128207] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
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16
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Alvear-Daza JJ, García-Barco A, Osorio-Vargas P, Gutiérrez-Zapata HM, Sanabria J, Rengifo-Herrera JA. Resistance and induction of viable but non culturable states (VBNC) during inactivation of E. coli and Klebsiella pneumoniae by addition of H 2O 2 to natural well water under simulated solar irradiation. WATER RESEARCH 2021; 188:116499. [PMID: 33049567 DOI: 10.1016/j.watres.2020.116499] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/01/2020] [Accepted: 10/04/2020] [Indexed: 05/15/2023]
Abstract
Inactivation of E. coli and Klebsiella pneumoniae by addition of H2O2 10 mg L-1 into natural well water samples containing natural total iron concentrations (around 0.3 mg L-1) under simulated solar light was followed by bacterial culturability (plate count) and viability (DVC-FISH). Results showed that culturability of both bacteria was totally reduced while viability was only completely depleted for E. coli in well water samples depending of total iron concentration. Post-irradiation effects in presence of residual H2O2 showed that viability of both bacteria kept dropping being totally reduced for E. coli cells while K. pneumoniae decreased only 1-log. SEM micrographs showed that E. coli and K. pneumoniae cells underwent morphological changes and size reduction according to VBNC states. Different dark and photo-induced processes where physical-chemical features of groundwater samples play an important role could be responsible of bacteria abatement.
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Affiliation(s)
- John J Alvear-Daza
- Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. J.J. Ronco" (CINDECA), Departamento de Química, Facultad de Ciencias Exactas, UNLP-CCT La Plata, CONICET, 47 No. 257, 1900 La Plata, Buenos Aires, Argentina
| | - Alejandra García-Barco
- Grupo de Investigación en Fotocatálisis y Estado Sólido, Escuela de Química, Universidad Técnologica de Pereira, Pereira, Risaralda 660003, Colombia
| | - Paula Osorio-Vargas
- Grupo de Investigación en Fotocatálisis y Estado Sólido, Escuela de Química, Universidad Técnologica de Pereira, Pereira, Risaralda 660003, Colombia; Laboratory of Thermal and Catalytic Processes (LPTC), Chemical Engineering School, Department of Wood Engineering. University of Bío-Bío, Concepción, Chile
| | - Héctor M Gutiérrez-Zapata
- Environmental Microbiology and Biotechnology Laboratory, Engineering School of Environmental & Natural Resources, Engineering Faculty, Universidad del Valle - Sede Meléndez, A.A. 25360, Santiago de Cali-Colombia, Colombia
| | - Janeth Sanabria
- Environmental Microbiology and Biotechnology Laboratory, Engineering School of Environmental & Natural Resources, Engineering Faculty, Universidad del Valle - Sede Meléndez, A.A. 25360, Santiago de Cali-Colombia, Colombia.
| | - Julián A Rengifo-Herrera
- Centro de Investigación y Desarrollo en Ciencias Aplicadas "Dr. J.J. Ronco" (CINDECA), Departamento de Química, Facultad de Ciencias Exactas, UNLP-CCT La Plata, CONICET, 47 No. 257, 1900 La Plata, Buenos Aires, Argentina.
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Zachanowicz E, Kulpa-Greszta M, Tomaszewska A, Gazińska M, Marędziak M, Marycz K, Pązik R. Multifunctional Properties of Binary Polyrhodanine Manganese Ferrite Nanohybrids-From the Energy Converters to Biological Activity. Polymers (Basel) 2020; 12:polym12122934. [PMID: 33302596 PMCID: PMC7764815 DOI: 10.3390/polym12122934] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 01/18/2023] Open
Abstract
The PRHD@MnFe2O4 binary hybrids have shown a potential for applications in the biomedical field. The polymer cover/shell provides sufficient surface protection of magnetic nanoparticles against adverse effects on the biological systems, e.g., it protects against Fenton’s reactions and the generation of highly toxic radicals. The heating ability of the PRHD@MnFe2O4 was measured as a laser optical density (LOD) dependence either for powders as well as nanohybrid dispersions. Dry hybrids exposed to the action of NIR radiation (808 nm) can effectively convert energy into heat that led to the enormous temperature increase ΔT 170 °C (>190 °C). High concentrated colloidal suspensions (5 mg/mL) can generate ΔT of 42 °C (65 °C). Further optimization of the nanohybrids amount and laser parameters provides the possibility of temperature control within a biologically relevant range. Biological interactions of PRHD@MnFe2O4 hybrids were tested using three specific cell lines: macrophages (RAW 264.7), osteosarcoma cells line (UMR-106), and stromal progenitor cells of adipose tissue (ASCs). It was shown that the cell response was strongly dependent on hybrid concentration. Antimicrobial activity of the proposed composites against Escherichia coli and Staphylococcus aureus was confirmed, showing potential in the exploitation of the fabricated materials in this field.
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Affiliation(s)
- Emilia Zachanowicz
- Polymer Engineering and Technology Division, Wroclaw University of Technology, 50-370 Wrocław, Poland;
- Correspondence: (E.Z.); (R.P.)
| | - Magdalena Kulpa-Greszta
- Faculty of Chemistry, Rzeszow University of Technology, Aleja Powstańców Warszawy 12, 35-959 Rzeszow, Poland;
- Department of Biotechnology, Institute of Biology and Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland;
| | - Anna Tomaszewska
- Department of Biotechnology, Institute of Biology and Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland;
| | - Małgorzata Gazińska
- Polymer Engineering and Technology Division, Wroclaw University of Technology, 50-370 Wrocław, Poland;
| | - Monika Marędziak
- Faculty of Biology, University of Environmental and Life Sciences Wroclaw, Kożuchowska 5b, 50-631 Wroclaw, Poland; (M.M.); (K.M.)
| | - Krzysztof Marycz
- Faculty of Biology, University of Environmental and Life Sciences Wroclaw, Kożuchowska 5b, 50-631 Wroclaw, Poland; (M.M.); (K.M.)
| | - Robert Pązik
- Department of Biotechnology, Institute of Biology and Biotechnology, College of Natural Sciences, University of Rzeszow, Pigonia 1, 35-310 Rzeszow, Poland;
- Correspondence: (E.Z.); (R.P.)
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18
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Linares GR, Leng Y, Maric D, Chuang DM. Overexpression of fibroblast growth factor-21 (FGF-21) protects mesenchymal stem cells against caspase-dependent apoptosis induced by oxidative stress and inflammation. Cell Biol Int 2020; 44:2163-2169. [PMID: 32557962 PMCID: PMC10848314 DOI: 10.1002/cbin.11409] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 04/03/2020] [Accepted: 05/24/2020] [Indexed: 12/17/2022]
Abstract
The clinical application of stem cells offers great promise as a potential avenue for therapeutic use in neurodegenerative diseases. However, cell loss after transplantation remains a major challenge, which currently plagues the field. On the basis of our previous findings that fibroblast growth factor 21 (FGF-21) protected neurons from glutamate excitotoxicity and that upregulation of FGF-21 in a rat model of ischemic stroke was associated with neuroprotection, we proposed that overexpression of FGF-21 protects bone marrow-derived mesenchymal stem cells (MSCs) from apoptosis. To test this hypothesis, we examined whether the detrimental effects of apoptosis can be mitigated by the transgenic overexpression of FGF-21 in MSCs. FGF-21 was transduced into MSCs by lentivirus and its overexpression was confirmed by quantitative polymerase chain reaction. Moreover, FGF-21 overexpression did not stimulate the expression of other FGF family members, suggesting it does not activate a positive feedback system. The effects of hydrogen peroxide (H2 O2 ), tumor necrosis factor-α (TNF-α), and staurosporine, known inducers of apoptosis, were evaluated in FGF-21 overexpressing MSCs and mCherry control MSCs. Caspases 3 and 7 activity was markedly and dose-dependently increased by all three stimuli in mCherry MSCs. FGF-21 overexpression robustly suppressed caspase activation induced by H2 O2 and TNF-α, but not staurosporine. Moreover, the assessment of apoptotic morphological changes confirmed the protective effects of FGF-21 overexpression. Taken together, these results provide compelling evidence that FGF-21 plays a crucial role in protecting MSCs from apoptosis induced by oxidative stress and inflammation and merits further investigation as a strategy for enhancing the therapeutic efficacy of stem cell-based therapies.
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Affiliation(s)
- Gabriel R. Linares
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
- Department of Stem Cell Biology and Regenerative Medicine, Keck School of Medicine University of Southern California, Los Angeles, CA 90033, USA
- Eli and Edythe Broad CIRM Center for Regenerative Medicine and Stem Cell Research at USC, Los Angeles, CA 90033, USA
| | - Yan Leng
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
| | - Dragan Maric
- Flow Cytometry Core Facility, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892, USA
| | - De-Maw Chuang
- Intramural Research Program, National Institute of Mental Health, National Institutes of Health, Bethesda, MD 20892, USA
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MicroRNA-18a targeting of the STK4/MST1 tumour suppressor is necessary for transformation in HPV positive cervical cancer. PLoS Pathog 2020; 16:e1008624. [PMID: 32555725 PMCID: PMC7326282 DOI: 10.1371/journal.ppat.1008624] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 06/30/2020] [Accepted: 05/13/2020] [Indexed: 12/27/2022] Open
Abstract
Human papillomaviruses (HPV) are a major cause of malignancy worldwide. They are the aetiological agents of almost all cervical cancers as well as a sub-set of other anogenital and head and neck cancers. Hijacking of host cellular pathways is essential for virus pathogenesis; however, a major challenge remains to identify key host targets and to define their contribution to HPV-driven malignancy. The Hippo pathway regulates epithelial homeostasis by down-regulating the function of the transcription factor YAP. Increased YAP expression has been observed in cervical cancer but the mechanisms driving this increase remain unclear. We found significant down-regulation of the master Hippo regulatory kinase STK4 (also termed MST1) in cervical disease samples and cervical cancer cell lines compared with healthy controls. Re-introduction of STK4 inhibited the proliferation of HPV positive cervical cells and this corresponded with decreased YAP nuclear localization and decreased YAP-dependent gene expression. The HPV E6 and E7 oncoproteins maintained low STK4 expression in cervical cancer cells by upregulating the oncomiR miR-18a, which directly targeted the STK4 mRNA 3’UTR. Interestingly, miR-18a knockdown increased STK4 expression and activated the Hippo pathway, significantly reducing cervical cancer cell proliferation. Our results identify STK4 as a key cervical cancer tumour suppressor, which is targeted via miR-18a in HPV positive tumours. Our study indicates that activation of the Hippo pathway may offer a therapeutically beneficial option for cervical cancer treatment. HPVs are the causative agents of ~5% of human cancers. Better understanding of the mechanisms by which these viruses deregulate cellular signalling pathways may offer therapeutic options for HPV-associated malignancies. The transcription factor YAP is active in cervical cancer but the mechanisms controlling its activation remain unclear. YAP is negatively regulated and sequestered in the cytoplasm through activation of the Hippo pathway. We discovered that expression of the master Hippo kinase, STK4 (also termed MST1), is reduced in HPV positive cervical cell lines and cervical disease samples. Low STK4 levels were maintained by the HPV oncogenes through up-regulation of miR-18a, which targeted the STK4 mRNA 3’UTR. Re-introduction of STK4 or bypassing miR-18a-dependent regulation de-activated YAP-driven transcription and reduced cell proliferation. Thus, our study identifies a novel interplay between HPV oncogenes and the STK4 tumour suppressor and identifies the Hippo pathway as a target for therapeutic intervention in HPV-associated malignancies.
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20
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Synthesis of copper oxide nanoparticles by chemical and biogenic methods: photocatalytic degradation and in vitro antioxidant activity. ACTA ACUST UNITED AC 2020. [DOI: 10.1007/s41204-020-00078-w] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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21
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Muthuvel A, Jothibas M, Manoharan C, Jayakumar SJ. Synthesis of CeO2-NPs by chemical and biological methods and their photocatalytic, antibacterial and in vitro antioxidant activity. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04115-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Henderson CF, Bica I, Long FT, Irwin DD, Stull CH, Baker BW, Suarez Vega V, Taugher ZM, Fletes ED, Bartleson JM, Humphrey ML, Álvarez L, Akiyama M, Kumagai Y, Fukuto JM, Lin J. Cysteine Trisulfide Protects E. coli from Electrophile-Induced Death through the Generation of Cysteine Hydropersulfide. Chem Res Toxicol 2020; 33:678-686. [PMID: 31977195 DOI: 10.1021/acs.chemrestox.9b00494] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Hydropersulfide and polysulfide species have recently been shown to elicit a wide variety of biological and physiological responses. In this study, we examine the effects of cysteine trisulfide (Cys-SSS-Cys; also known as thiocystine) treatment on E. coli. Previous studies in mammalian cells have shown that Cys-SSS-Cys treatment results in protection from the electrophiles. Here, we show that the protective effect of Cys-SSS-Cys treatment against electrophile-induced cell death is conserved in E. coli. This protection correlates with the rapid generation of cysteine hydropersulfide (Cys-SSH) in the culture media. We go on to demonstrate that an exogenous phosphatase expressed in E. coli, containing only a single catalytic cysteine, is protected from electrophile-induced inactivation in the presence of hydropersulfides. These data together demonstrate that E. coli can utilize Cys-SSS-Cys to generate Cys-SSH and that the Cys-SSH can protect cellular thiols from reactivity with the electrophiles.
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Affiliation(s)
- Catherine F Henderson
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Iris Bica
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Faith T Long
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Drew D Irwin
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Christine H Stull
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Blaine W Baker
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Valeria Suarez Vega
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Zachary M Taugher
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Eliza D Fletes
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Juliet M Bartleson
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Megan L Humphrey
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Lucía Álvarez
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires , INQUIMAE-CONICET, Ciudad Universitaria, C1428EGA Buenos Aires , Argentina
| | - Masahiro Akiyama
- Environmental Biology Section, Faculty of Medicine , University of Tsukuba , Tsukuba , Ibaraki 305-8575 , Japan
| | - Yoshito Kumagai
- Environmental Biology Section, Faculty of Medicine , University of Tsukuba , Tsukuba , Ibaraki 305-8575 , Japan
| | - Jon M Fukuto
- Department of Chemistry , Sonoma State University , Rohnert Park , California 94928 , United States
| | - Joseph Lin
- Department of Biology , Sonoma State University , Rohnert Park , California 94928 , United States
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Calabrese G, Peker E, Amponsah PS, Hoehne MN, Riemer T, Mai M, Bienert GP, Deponte M, Morgan B, Riemer J. Hyperoxidation of mitochondrial peroxiredoxin limits H 2 O 2 -induced cell death in yeast. EMBO J 2019; 38:e101552. [PMID: 31389622 PMCID: PMC6745495 DOI: 10.15252/embj.2019101552] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 07/04/2019] [Accepted: 07/08/2019] [Indexed: 11/20/2022] Open
Abstract
Hydrogen peroxide (H2O2) plays important roles in cellular signaling, yet nonetheless is toxic at higher concentrations. Surprisingly, the mechanism(s) of cellular H2O2 toxicity remain poorly understood. Here, we reveal an important role for mitochondrial 1‐Cys peroxiredoxin from budding yeast, Prx1, in regulating H2O2‐induced cell death. We show that Prx1 efficiently transfers oxidative equivalents from H2O2 to the mitochondrial glutathione pool. Deletion of PRX1 abrogates glutathione oxidation and leads to a cytosolic adaptive response involving upregulation of the catalase, Ctt1. Both of these effects contribute to improved cell viability following an acute H2O2 challenge. By replacing PRX1 with natural and engineered peroxiredoxin variants, we could predictably induce widely differing matrix glutathione responses to H2O2. Therefore, we demonstrated a key role for matrix glutathione oxidation in driving H2O2‐induced cell death. Finally, we reveal that hyperoxidation of Prx1 serves as a switch‐off mechanism to limit oxidation of matrix glutathione at high H2O2 concentrations. This enables yeast cells to strike a fine balance between H2O2 removal and limitation of matrix glutathione oxidation.
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Affiliation(s)
- Gaetano Calabrese
- Department for Chemistry, Institute for Biochemistry, University of Cologne, Cologne, Germany
| | - Esra Peker
- Department for Chemistry, Institute for Biochemistry, University of Cologne, Cologne, Germany
| | - Prince Saforo Amponsah
- Department for Biology, Cellular Biochemistry, University of Kaiserslautern, Kaiserslautern, Germany.,Institute of Biochemistry, University of the Saarland, Saarbruecken, Germany
| | - Michaela Nicole Hoehne
- Department for Chemistry, Institute for Biochemistry, University of Cologne, Cologne, Germany
| | - Trine Riemer
- Department for Chemistry, Institute for Biochemistry, University of Cologne, Cologne, Germany
| | - Marie Mai
- Institute of Biochemistry, University of the Saarland, Saarbruecken, Germany
| | - Gerd Patrick Bienert
- Department of Physiology and Cell Biology, Leibniz-Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | - Marcel Deponte
- Department of Chemistry/Biochemistry, University of Kaiserslautern, Kaiserslautern, Germany
| | - Bruce Morgan
- Institute of Biochemistry, University of the Saarland, Saarbruecken, Germany
| | - Jan Riemer
- Department for Chemistry, Institute for Biochemistry, University of Cologne, Cologne, Germany
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TRPM2 ion channel promotes gastric cancer migration, invasion and tumor growth through the AKT signaling pathway. Sci Rep 2019; 9:4182. [PMID: 30862883 PMCID: PMC6414629 DOI: 10.1038/s41598-019-40330-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 01/28/2019] [Indexed: 12/27/2022] Open
Abstract
Transient Receptor Potential Melastatin-2 (TRPM2) ion channel is emerging as a great therapeutic target in many types of cancer, including gastric cancer - a major health threat of cancer related-death worldwide. Our previous study demonstrated the critical role of TRPM2 in gastric cancer cells bioenergetics and survival; however, its role in gastric cancer metastasis, the major cause of patient death, remains unknown. Here, using molecular and functional assays, we demonstrate that TRPM2 downregulation significantly inhibits the migration and invasion abilities of gastric cancer cells, with a significant reversion in the expression level of metastatic markers. These effects were concomitant with decreased Akt and increased PTEN activities. Finally, TRPM2 silencing resulted in deregulation of metastatic markers and abolished the tumor growth ability of AGS gastric cancer cells in NOD/SCID mice. Taken together, our results provide compelling evidence on the important function of TRPM2 in the modulation of gastric cancer cell invasion likely through controlling the PTEN/Akt pathway.
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Karami-Gadallo L, Ataie-Fashtami L, Ghoranneviss M, Pouladian M, Sardari D. Cell damaging by irradiating non-thermal plasma to the water: Mathematical modeling of chemical processes. MOLECULAR BIOLOGY RESEARCH COMMUNICATIONS 2018; 7:133-141. [PMID: 30426031 DOI: 10.22099/mbrc.2018.29751.1325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 09/30/2022]
Abstract
Recently non-thermal plasma (NTP) is applied for many therapeutic applications. By NTP irradiating to the tissues or cell-lines, the water molecules (H2O) would be also activated leading to generate hydrogen peroxide (H2O2). By irradiating plasma to bio-solution, its main output including vacuum UV to UV causes the photolysis of H2O leading to generate hydroxyl (OH) molecules in couple forms with ability to convert to H2O2. Additionally, other plasma's output the oxygen atoms could also penetrate under the liquid's surface and react with H2O to generate H2O2. In NTP applications for killing unwanted-cells of microorganisms (e.g. sterilization) or cancerous tissues, the H2O2 molecule is the main reactive species for cell death via inducing DNA damage in mammalian cells. In this paper we proposed a mathematical model for NTP application describing the formation of hydroxyls in the bio solution and other subsequent reactions leading to DNA damage in vitro. The instant concentrations of the OH and H2O2, the main species for DNA oxidation were obtained and investigated in this simulation. In order to validate the model, the cellular response to NTP stimulation was compared with some experimental findings from viewpoint of DNA damage to show the significant consistency.
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Affiliation(s)
- Leila Karami-Gadallo
- Department of Medical Radiation Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Leila Ataie-Fashtami
- Department of Regenerative Medicine, Royan Institute for Stem Cell Biology & Technology, Tehran, Iran
| | - Mahmood Ghoranneviss
- Department of Plasma Physics, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Majid Pouladian
- Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.,Research Center of 'Engineering in Medicine and Biology', Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Dariush Sardari
- Department of Medical Radiation Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
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Giannakis S. Analogies and differences among bacterial and viral disinfection by the photo-Fenton process at neutral pH: a mini review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:27676-27692. [PMID: 29255985 DOI: 10.1007/s11356-017-0926-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 12/03/2017] [Indexed: 04/16/2023]
Abstract
Over the last years, the photo-Fenton process has been established as an effective, green alternative to chemical disinfection of waters and wastewaters. Microorganisms' inactivation is the latest success story in the application of this process at near-neutral pH, albeit without clearly elucidated inactivation mechanisms. In this review, the main pathways of the combined photo-Fenton process against the most frequent pathogen models (Escherichia coli for bacteria and MS2 bacteriophage for viruses) are analyzed. Firstly, the action of solar light is described and the specific inactivation mechanisms in bacteria (internal photo-Fenton) and viruses (genome damage) are presented. The contribution of the external pathways due to the potential presence of organic matter in generating reactive oxygen species (ROS) and their effects on microorganism inactivation are discussed. Afterwards, the effects of the gradual addition of Fe and H2O2 are assessed and the differences among bacterial and viral inactivation are highlighted. As a final step, the simultaneous addition of both reagents induces the photo-Fenton in the bulk, focusing on the differences induced by the homogeneous or heterogeneous fraction of the process and the variation among the two respective targets. This work exploits the accumulated evidence on the mechanisms of bacterial inactivation and the scarce ones towards viral targets, aiming to bridge this knowledge gap and make possible the further application of the photo-Fenton process in the field of water/wastewater treatment.
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Affiliation(s)
- Stefanos Giannakis
- School of Basic Sciences (SB), Institute of Chemical Science and Engineering (ISIC), Group of Advanced Oxidation Processes (GPAO), École Polytechnique Fédérale de Lausanne (EPFL), Station 6, 1015, Lausanne, Switzerland.
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Giannakis S, Watts S, Rtimi S, Pulgarin C. Solar light and the photo-Fenton process against antibiotic resistant bacteria in wastewater: A kinetic study with a Streptomycin-resistant strain. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.10.033] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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28
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Shuryak I, Matrosova VY, Gaidamakova EK, Tkavc R, Grichenko O, Klimenkova P, Volpe RP, Daly MJ. Microbial cells can cooperate to resist high-level chronic ionizing radiation. PLoS One 2017; 12:e0189261. [PMID: 29261697 PMCID: PMC5738026 DOI: 10.1371/journal.pone.0189261] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 11/22/2017] [Indexed: 11/18/2022] Open
Abstract
Understanding chronic ionizing radiation (CIR) effects is of utmost importance to protecting human health and the environment. Diverse bacteria and fungi inhabiting extremely radioactive waste and disaster sites (e.g. Hanford, Chernobyl, Fukushima) represent new targets of CIR research. We show that many microorganisms can grow under intense gamma-CIR dose rates of 13–126 Gy/h, with fungi identified as a particularly CIR-resistant group of eukaryotes: among 145 phylogenetically diverse strains tested, 78 grew under 36 Gy/h. Importantly, we demonstrate that CIR resistance can depend on cell concentration and that certain resistant microbial cells protect their neighbors (not only conspecifics, but even radiosensitive species from a different phylum), from high-level CIR. We apply a mechanistically-motivated mathematical model of CIR effects, based on accumulation/removal kinetics of reactive oxygen species (ROS) and antioxidants, in bacteria (3 Escherichia coli strains and Deinococcus radiodurans) and in fungi (Candida parapsilosis, Kazachstania exigua, Pichia kudriavzevii, Rhodotorula lysinophila, Saccharomyces cerevisiae, and Trichosporon mucoides). We also show that correlations between responses to CIR and acute ionizing radiation (AIR) among studied microorganisms are weak. For example, in D. radiodurans, the best molecular correlate for CIR resistance is the antioxidant enzyme catalase, which is dispensable for AIR resistance; and numerous CIR-resistant fungi are not AIR-resistant. Our experimental findings and quantitative modeling thus demonstrate the importance of investigating CIR responses directly, rather than extrapolating from AIR. Protection of radiosensitive cell-types by radioresistant ones under high-level CIR is a potentially important new tool for bioremediation of radioactive sites and development of CIR-resistant microbiota as radioprotectors.
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Affiliation(s)
- Igor Shuryak
- Center for Radiological Research, Columbia University, New York, NY, United States of America
- * E-mail:
| | - Vera Y. Matrosova
- Uniformed Services University of the Health Sciences, School of Medicine, Bethesda, MD, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States of America
| | - Elena K. Gaidamakova
- Uniformed Services University of the Health Sciences, School of Medicine, Bethesda, MD, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States of America
| | - Rok Tkavc
- Uniformed Services University of the Health Sciences, School of Medicine, Bethesda, MD, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States of America
| | - Olga Grichenko
- Uniformed Services University of the Health Sciences, School of Medicine, Bethesda, MD, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States of America
| | - Polina Klimenkova
- Uniformed Services University of the Health Sciences, School of Medicine, Bethesda, MD, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States of America
| | - Robert P. Volpe
- Uniformed Services University of the Health Sciences, School of Medicine, Bethesda, MD, United States of America
- Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, United States of America
| | - Michael J. Daly
- Uniformed Services University of the Health Sciences, School of Medicine, Bethesda, MD, United States of America
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Gutiérrez-Zapata HM, Alvear-Daza JJ, Rengifo-Herrera JA, Sanabria J. Addition of Hydrogen Peroxide to Groundwater with Natural Iron Induces Water Disinfection by Photo-Fenton at Circumneutral pH and other Photochemical Events. Photochem Photobiol 2017; 93:1224-1231. [DOI: 10.1111/php.12779] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 03/17/2017] [Indexed: 01/21/2023]
Affiliation(s)
- Héctor Mario Gutiérrez-Zapata
- Environmental Microbiology and Biotechnology Laboratory; Engineering School of Environmental & Natural Resources; Engineering Faculty; Universidad del Valle - Sede Meléndez; Cali Colombia
| | - John Jairo Alvear-Daza
- Environmental Microbiology and Biotechnology Laboratory; Engineering School of Environmental & Natural Resources; Engineering Faculty; Universidad del Valle - Sede Meléndez; Cali Colombia
| | - Julián Andrés Rengifo-Herrera
- Centro de Investigación y Desarrollo en Ciencias Aplicadas “Dr. J.J. Ronco” (CINDECA); Departamento de Química; Facultad de Ciencias Exactas; UNLP-CCT La Plata; La Plata Buenos Aires Argentina
| | - Janeth Sanabria
- Environmental Microbiology and Biotechnology Laboratory; Engineering School of Environmental & Natural Resources; Engineering Faculty; Universidad del Valle - Sede Meléndez; Cali Colombia
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In vitro protective effects of botryosphaeran, a (1→3;1→6)-β-d-glucan, against mutagens in normal and tumor rodent cells. MUTATION RESEARCH-GENETIC TOXICOLOGY AND ENVIRONMENTAL MUTAGENESIS 2017; 814:29-36. [PMID: 28137365 DOI: 10.1016/j.mrgentox.2016.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Revised: 12/14/2016] [Accepted: 12/17/2016] [Indexed: 12/16/2022]
Abstract
Botryosphaeran (BOT) is an exocellular β-d-glucan (carbohydrate biopolymer) of the (1→3;1→6)-linked type produced by Botryosphaeria rhodina MAMB-05. The cytotoxic, mutagenic, genotoxic, and protective effects of this substance were evaluated in Chinese hamster lung fibroblasts (V79) and rat hepatocarcinoma cells (HTC) by the micronucleus test (MN) and the comet assay. BOT was not genotoxic in either cell line; it decreased the clastogenic effects of doxorubicin, H2O2, and benzo[a]pyrene. These results indicate that BOT may have potential as a therapeutic agent.
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Uhl L, Dukan S. Hydrogen Peroxide Induced Cell Death: The Major Defences Relative Roles and Consequences in E. coli. PLoS One 2016; 11:e0159706. [PMID: 27494019 PMCID: PMC4975445 DOI: 10.1371/journal.pone.0159706] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Accepted: 07/07/2016] [Indexed: 02/02/2023] Open
Abstract
We recently developed a mathematical model for predicting reactive oxygen species (ROS) concentration and macromolecules oxidation in vivo. We constructed such a model using Escherichia coli as a model organism and a set of ordinary differential equations. In order to evaluate the major defences relative roles against hydrogen peroxide (H2O2), we investigated the relative contributions of the various reactions to the dynamic system and searched for approximate analytical solutions for the explicit expression of changes in H2O2 internal or external concentrations. Although the key actors in cell defence are enzymes and membrane, a detailed analysis shows that their involvement depends on the H2O2 concentration level. Actually, the impact of the membrane upon the H2O2 stress felt by the cell is greater when micromolar H2O2 is present (9-fold less H2O2 in the cell than out of the cell) than when millimolar H2O2 is present (about 2-fold less H2O2 in the cell than out of the cell). The ratio between maximal external H2O2 and internal H2O2 concentration also changes, reducing from 8 to 2 while external H2O2 concentration increases from micromolar to millimolar. This non-linear behaviour mainly occurs because of the switch in the predominant scavenger from Ahp (Alkyl Hydroperoxide Reductase) to Cat (catalase). The phenomenon changes the internal H2O2 maximal concentration, which surprisingly does not depend on cell density. The external H2O2 half-life and the cumulative internal H2O2 exposure do depend upon cell density. Based on these analyses and in order to introduce a concept of dose response relationship for H2O2-induced cell death, we developed the concepts of “maximal internal H2O2 concentration” and “cumulative internal H2O2 concentration” (e.g. the total amount of H2O2). We predict that cumulative internal H2O2 concentration is responsible for the H2O2-mediated death of bacterial cells.
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Affiliation(s)
- Lionel Uhl
- Institut de Microbiologie de la Méditerranée - Université Aix-Marseille, Laboratoire de Chimie Bactérienne, CNRS UMR7283, 31 Chemin Joseph Aiguier, 13009 Marseille, France
| | - Sam Dukan
- Institut de Microbiologie de la Méditerranée - Université Aix-Marseille, Laboratoire de Chimie Bactérienne, CNRS UMR7283, 31 Chemin Joseph Aiguier, 13009 Marseille, France
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