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Li J, Li P, Zhang B, Fang J, Zhong W, Ma F. Effect of free radicals on rheological properties, antioxidant activity, and molecular conformation of chitosan under solution pulsed plasma process based on radical scavengers. Int J Biol Macromol 2024; 262:130260. [PMID: 38368984 DOI: 10.1016/j.ijbiomac.2024.130260] [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: 06/20/2023] [Revised: 02/03/2024] [Accepted: 02/15/2024] [Indexed: 02/20/2024]
Abstract
Radical scavengers were employed to evaluate the influence of various active species (•OH, •O, and H2O2) on the rheological properties, antioxidant activity, and molecular conformation of chitosan under solution plasma process (SPP) degradation. ESR analysis showed that •OH and •O radicals played important roles in SPP degradation. The results of rheological properties and antioxidant activity indicated that the •OH scavenger (tert-butanol), •O scavenger (1, 4-benzoquinone), and H2O2 scavenger (MnO2) remarkably inhibited the decrease of G' and G" of the degraded chitosan, the formation of gel structure, and the increase of antioxidant activity. The analysis of molecular conformation of the chitosan by particle size analysis, atomic force microscopy (AFM), and high performance size exclusion chromatography coupled with multi-angle laser light scattering (HPSEC-MALLS) revealed that the decrease of particle size, molecular aggregation, and molecular weight of chitosan was inhibited after the addition of radical scavengers. An evident effect of radical scavengers on the hard sphere conformation of chitosan was observed. It was found that the above effects were strongly dependent on the scavenger concentration. These results proved that •OH, •O, and H2O2 played important roles in SPP treatment. For the rheological properties and molecular conformation, H2O2 exhibited the greatest impact. For the antioxidant activity and molecular weight, •OH presented the biggest influence. Besides, •O expressed the weakest effect. This study will be beneficial to reveal the action mechanisms of SPP technology to the degradation of chitosan.
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Affiliation(s)
- Jinfeng Li
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Pu Li
- College of art design and architecture, Liaoning University of Technology, Jinzhou 121001, China
| | - Baiqing Zhang
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Jun Fang
- Tianjin Agricultural Development Service Center, Tianjin 300202, China
| | - Weitian Zhong
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Fengming Ma
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China; Chongqing Research Institute of HIT, Harbin Institute of Technology, Harbin 150001, China.
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Pinna A, Torki Baghbaderani M, Vigil Hernández V, Naruphontjirakul P, Li S, McFarlane T, Hachim D, Stevens MM, Porter AE, Jones JR. Nanoceria provides antioxidant and osteogenic properties to mesoporous silica nanoparticles for osteoporosis treatment. Acta Biomater 2021; 122:365-76. [PMID: 33359295 DOI: 10.1016/j.actbio.2020.12.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/02/2020] [Accepted: 12/13/2020] [Indexed: 01/06/2023]
Abstract
Osteoporosis, a chronic metabolic bone disease, is the most common cause of fractures. Drugs for treating osteoporosis generally inhibit osteoclast (OC) activity, but are rarely aimed at encouraging new bone growth and often cause severe systemic side effects. Reactive oxygen species (ROS) are one of the key triggers of osteoporosis, by inducing osteoblast (OB) and osteocyte apoptosis and promoting osteoclastogenesis. Here we tested the capability of the ROS-scavenger nanoceria encapsulated within mesoporous silica nanoparticles (Ce@MSNs) to treat osteoporosis using a pre-osteoblast MC3T3-E1 cell monoculture in stressed and normal conditions. Ce@MSNs (diameter of 80 ± 10 nm) were synthesised following a scalable two-step process involving sol-gel and wet impregnation methods. The Ce@MSNs at concentration of 100 μg mL-1 induced a significant reduction in oxidative stress produced by t-butyl hydroperoxide and did not alter cell viability significantly. Confocal microscopy showed that MSNs and Ce@MsNs were internalised into the cytoplasm of the pre-osteoblasts after 24 h but were not in the nucleus, avoiding any DNA and RNA modifications. Ce@MSNs provoked mineralisation of the pre-osteoablasts without osteogenic supplements, which did not occur when the cells were exposed to MSN without nanoceria. In a co-culture system of MC3T3-E1 and RAW264.7 macrophages, the Ce@MSNs exhibited antioxidant capability and stimulated cell proliferation and osteogenic responses without adding osteogenic supplements to the culture. The work brings forward an effective platform based for facile synthesis of Ce@MSNs to interact with both OBs and OCs for treatment of osteoporosis.
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Palharim PH, Graça CAL, Teixeira ACSC. Comparison between UVA- and zero-valent iron-activated persulfate processes for degrading propylparaben. Environ Sci Pollut Res Int 2020; 27:22214-22224. [PMID: 32124285 DOI: 10.1007/s11356-020-08141-4] [Citation(s) in RCA: 7] [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: 10/11/2019] [Accepted: 02/17/2020] [Indexed: 06/10/2023]
Abstract
Conventional wastewater treatments are not efficient in removing parabens, which may thus end up in surface waters, posing a threat to aquatic biota and human health. As an alternative treatment, persulfate (PS)-driven advanced oxidation technologies have gained growing attention for removing these pollutants. In this study, the degradation of propylparaben (PrP) by UVA- and zero-valent iron (ZVI)-activated persulfate was investigated. The effects of initial PS concentration ([PS]0) and irradiance or ZVI concentration were explored using the Doehlert experimental design. For the UVA-activated system, the specific PrP degradation rate (k) and percent removal were consistently higher for increasing [PS]0 and irradiance, varying in the ranges 0.0053-0.0192 min-1 and 37.9-77.3%, respectively. In contrast, extremely fast PrP degradation was achieved through the ZVI/PS process (0.3304 < k < 0.9212 min-1), with removal percentages above 97.5%; in this case, paraben degradation was hindered for a ZVI dosage beyond 40 mg L-1. Regarding toxicity, ECOSAR predictions suggest that the degradation products elucidated by LC-MS/MS are less toxic than PrP toward fish, daphnid, and green algae. In addition, both processes showed to be strongly dependent on the water matrix, being ZVI/PS more impacted for a MBR effluent, although its performance was much better than that exhibited by the UVA-driven process (t1/2 of 65.4 and 276.1 min, respectively).
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Affiliation(s)
- Priscila H Palharim
- Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical Engineering, University of São Paulo, Av. Prof. Luciano Gualberto, 380, tv 3, São Paulo, 05508-900, Brazil.
| | - Cátia A L Graça
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
| | - Antonio C S C Teixeira
- Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical Engineering, University of São Paulo, Av. Prof. Luciano Gualberto, 380, tv 3, São Paulo, 05508-900, Brazil
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Bandeira PT, Dalmolin MC, de Oliveira MM, Nunes KC, Garcia FP, Nakamura CV, de Oliveira ARM, Piovan L. Synthesis, Antioxidant Activity and Cytotoxicity of N-Functionalized Organotellurides. Bioorg Med Chem 2018; 27:410-415. [PMID: 30554969 DOI: 10.1016/j.bmc.2018.12.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 11/28/2018] [Accepted: 12/10/2018] [Indexed: 12/30/2022]
Abstract
The use of antioxidants is the most effective means to protect the organism against cellular damage caused by oxidative stress. In this context, organotellurides have been described as promising antioxidant agents for decades. Herein, a series of N-functionalized organotellurium compounds has been tested as antioxidant and presented remarkable activities by three different in vitro chemical assays. They were able to reduce DPPH radical with IC50 values ranging from 5.08 to 19.20 µg mL-1, and some of them also reduced ABTS+ radical and TPTZ-Fe3+ complex in ABTS+ and FRAP assays, respectively. Initial structure-activity relationship discloses that the nature of N-substituent strongly influenced both activity and cytotoxicity of the studied compounds. Furthermore, radical scavenging activities of N-functionalized organotellurides have been compared with those of their selenilated congeners, demonstrating that the presence of tellurium atom has an essential role in antioxidant activity.
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Affiliation(s)
- Pamela T Bandeira
- Departamento de Química, Universidade Federal do Paraná, Curitiba 4106902, Brazil
| | - Mara C Dalmolin
- Departamento de Química, Universidade Federal do Paraná, Curitiba 4106902, Brazil
| | - Mariana M de Oliveira
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | - Karine C Nunes
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | - Francielle P Garcia
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | - Celso V Nakamura
- Centro de Ciências da Saúde, Universidade Estadual de Maringá, Maringá 4115200, Brazil
| | | | - Leandro Piovan
- Departamento de Química, Universidade Federal do Paraná, Curitiba 4106902, Brazil.
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Singh RK, Philip L, Ramanujam S. Rapid degradation, mineralization and detoxification of pharmaceutically active compounds in aqueous solution during pulsed corona discharge treatment. Water Res 2017; 121:20-36. [PMID: 28505531 DOI: 10.1016/j.watres.2017.05.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 03/04/2017] [Revised: 05/01/2017] [Accepted: 05/04/2017] [Indexed: 06/07/2023]
Abstract
In the present study, plasma generated by pulsed corona discharge was used for the degradation of diclofenac, carbamazepine and ciprofloxacin. Pollutants in aqueous solution were plasma treated under two categories: single and mixed pollutant condition. Mixed pollutant condition showed an antagonistic behaviour and thus the degradation time was higher for mixed condition compared to the single condition. At different voltage and frequencies, degradation efficiency followed the trend, diclofenac>carbamazepine>ciprofloxacin. Acidic pH slightly favoured the degradation process whereas in presence of radical scavengers (HCO3-, CO32- and humic acid) the degradation yield was significantly decreased. With an input power of 101.5 W, complete degradation was achieved within 4-16 min of plasma treatment for pharmaceutical's concentrations of 1-10 mg/L. As the pollutant concentration increased from 1 to 10 mg/L, the pseudo first order rate constant decreased, while yield increased. Complete degradation pathway of diclofenac, carbamazepine and ciprofloxacin in plasma treatment process are proposed by identifying the intermediates using LC-MS analysis. TOC analysis confirmed 80% mineralization within 10 min of plasma treatment for higher pharmaceutical's concentrations of 10 mg/L. The microalgae ecotoxicity study and disc diffusion test confirmed the complete detoxification of PACs that took place after 6 min of plasma treatment.
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Affiliation(s)
- Raj Kamal Singh
- Department of Civil Engineering, Indian Institute of Technology, Madras, 600036, India
| | - Ligy Philip
- Department of Civil Engineering, Indian Institute of Technology, Madras, 600036, India.
| | - Sarathi Ramanujam
- Department of Electrical Engineering, Indian Institute of Technology, Madras, 600036, India
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Zhu Y, Mahaney J, Jellison J, Cao J, Gressler J, Hoffmeister D, Goodell B. Fungal variegatic acid and extracellular polysaccharides promote the site-specific generation of reactive oxygen species. J Ind Microbiol Biotechnol 2016; 44:329-338. [PMID: 28032229 DOI: 10.1007/s10295-016-1889-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/14/2016] [Indexed: 01/19/2023]
Abstract
This study aims to clarify the role of variegatic acid (VA) in fungal attack by Serpula lacrymans, and also the generation and scavenging of reactive oxygen species (ROS) by the fungus. VA promotes a mediated Fenton reaction to generated ROS after oxalate solubilizes oxidized forms of iron. The fungal extracellular matrix (ECM) β-glucan scavenged ROS, and we propose this as a mechanism to protect the fungal hyphae while ROS generation is promoted to deconstruct the lignocellulose cell wall. A relatively high pH (4.4) also favored Fe(III) transfer from oxalate to VA as opposed to a lower pH (2.2) conditions, suggesting a pH-dependent Fe(III) transfer to VA employed by S. lacrymans. This permits ROS generation within the higher pH of the cell wall, while limiting ROS production near the fungal hyphae, while β-glucan from the fungal ECM scavenges ROS in the more acidic environments surrounding the fungal hyphae.
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Affiliation(s)
- Yuan Zhu
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing, China.,Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, VA, USA
| | - James Mahaney
- Edward Via Virginia College of Osteopathic Medicine, Blacksburg, VA, USA
| | - Jody Jellison
- Center for Agriculture, Food and the Environment, 319 Stockbridge Hall, University of Massachusetts, Amherst, MA, USA
| | - Jinzhen Cao
- MOE Key Laboratory of Wooden Material Science and Application, Beijing Forestry University, Beijing, China.
| | - Julia Gressler
- Department of Pharmaceutical Microbiology at the Hans Knöll Institute, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Dirk Hoffmeister
- Department of Pharmaceutical Microbiology at the Hans Knöll Institute, Friedrich-Schiller-Universität Jena, Jena, Germany
| | - Barry Goodell
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, VA, USA.
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Khalil MF, Valenzuela C, Sisniega D, Skouta R, Narayan M. ER Protein Processing Under Oxidative Stress: Implications and Prevention. Cell Biochem Biophys 2016; 74:213-20. [PMID: 26983927 DOI: 10.1007/s12013-016-0726-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 12/10/2015] [Accepted: 02/18/2016] [Indexed: 01/01/2023]
Abstract
Elevated levels of mitochondrial nitrosative stress have been associated with the pathogenesis of both Parkinson's and Alzheimer's diseases. The mechanism involves catalytic poisoning of the endoplasmic reticulum (ER)-resident oxidoreductase chaperone, protein disulfide isomerase (PDI), and the subsequent accumulation of ER-processed substrate proteins. Using a model system to mimic mitochondrial oxidative and nitrosative stress, we demonstrate a PDI-independent mechanism whereby reactive oxygen species (ROS) compromise regeneration rates of disulfide bond-containing ER-processed proteins. Under ROS-duress, the secretion-destined traffic adopts disulfide-exposed structures making the protein flux retrotranslocation biased. We also demonstrate that ROS-compromised protein maturation rates can be rescued by the polyphenol ellagic acid (EA). Our results are significant in that they reveal an additional mechanism which could promote neurodegenerative disorders. Furthermore, our data reveal that EA possesses therapeutic potential as a lead prophylactic agent against oxidative/nitrosative stress-related neurodegenerative diseases.
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Affiliation(s)
- Mahmoud F Khalil
- Department of Chemistry, University of Texas at El Paso, 500 W. University Ave., Chemistry and Computer Science Building 2.0202, 121 A Spiel Paso, El Paso, TX, 79968, USA
| | - Carlos Valenzuela
- Department of Chemistry, University of Texas at El Paso, 500 W. University Ave., Chemistry and Computer Science Building 2.0202, 121 A Spiel Paso, El Paso, TX, 79968, USA
| | - Daniella Sisniega
- Boston University School of Medicine, 72 E Concord St, Boston, MA, 02118, USA
| | - Rachid Skouta
- Department of Chemistry, University of Texas at El Paso, 500 W. University Ave., Chemistry and Computer Science Building 2.0202, 121 A Spiel Paso, El Paso, TX, 79968, USA.
- Border Biomedical Research Center, The University of Texas at El Paso, El Paso, TX, 79968, USA.
| | - Mahesh Narayan
- Department of Chemistry, University of Texas at El Paso, 500 W. University Ave., Chemistry and Computer Science Building 2.0202, 121 A Spiel Paso, El Paso, TX, 79968, USA.
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Ramos-Enríquez MA, Medina-Campos ON, Pedraza-Chaverri J, Iglesias-Arteaga MA. Synthesis and radical scavenger properties of novel spirochromenes derived from steroid sapogenins. Steroids 2015; 98:132-7. [PMID: 25824324 DOI: 10.1016/j.steroids.2015.03.013] [Citation(s) in RCA: 12] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 03/10/2015] [Accepted: 03/20/2015] [Indexed: 11/23/2022]
Abstract
Tandem aldol condensation between steroid sapogenins and hydroxylated benzaldehydes afforded steroidal spirochromenes. Compounds that bear a phenolic hydroxyl group at position C-6', obtained by a reaction with 2,5-dihydroxybenzaldehyde, showed approximately 80% of maximal radical scavenging activity in the 1,1-diphenyl-2-picrylhydrazyl radical (DPPH) assay at 288 nM. In contrast, the starting steroid sapogenins and the spirochromenes without a phenolic group in the side chain proved to be inactive.
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Affiliation(s)
- Manuel A Ramos-Enríquez
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., Mexico
| | - Omar N Medina-Campos
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., Mexico
| | - José Pedraza-Chaverri
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., Mexico
| | - Martín A Iglesias-Arteaga
- Facultad de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 México, D.F., Mexico.
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Rong S, Sun Y. Degradation of TAIC by water falling film dielectric barrier discharge--influence of radical scavengers. J Hazard Mater 2015; 287:317-324. [PMID: 25668300 DOI: 10.1016/j.jhazmat.2015.02.003] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/30/2015] [Accepted: 02/01/2015] [Indexed: 06/04/2023]
Abstract
This work describes the application of plasma generated by water falling film dielectric barrier discharge for the degradation of triallyl isocyanurate (TAIC). The results indicated that TAIC solution of 1000mg/L was effectively removed within 60min treatment at 120W output power. Six intermediates were identified and a possible evolution of the TAIC degradation process was continuously proposed basing on the results of mass spectrum analysis. The effects of metal ions and radical scavengers were investigated. Results showed that whatever hydrogen radical scavengers (carbon tetrachloride, perfluorooctane) or hydroxyl radical scavengers (iso-propyl alcohol, tert-butyl alcohol) all could further enhance the degradation processes, and both kings of radical scavengers could promote the generation of H2O2. In the present study, we employed a novel method by introducing the mixed additives of Fe(2+) and radical scavengers into the plasma. It was found that the reaction rate constant and energy efficiency were improved by 309.2% and 387.8%, respectively. Among the mixed additives, Fe(2+) could promote the decomposition and increase the oxidizing power of H2O2, which is generated from the plasma discharge and greatly enhanced by the radical scavengers.
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Affiliation(s)
- Shaopeng Rong
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, PR China
| | - Yabing Sun
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, PR China.
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Bokhale NB, Bomble SD, Dalbhanjan RR, Mahale DD, Hinge SP, Banerjee BS, Mohod AV, Gogate PR. Sonocatalytic and sonophotocatalytic degradation of Rhodamine 6G containing wastewaters. Ultrason Sonochem 2014; 21:1797-804. [PMID: 24726320 DOI: 10.1016/j.ultsonch.2014.03.022] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 03/13/2014] [Accepted: 03/22/2014] [Indexed: 05/27/2023]
Abstract
The present work deals with degradation of aqueous solution of Rhodamine 6G (Rh 6G) using sonocatalytic and sonophotocatalytic treatment schemes based on the use of cupric oxide (CuO) and titanium dioxide (TiO2) as the solid catalysts. Experiments have been carried out at the operating capacity of 2 L and constant initial pH of 12.5. The effect of catalyst loading on the sonochemical degradation has been investigated by varying the loading over the range of 1.5-4.5 g/L. It has been observed that the maximum degradation of 52.2% was obtained at an optimum concentration of CuO as 1.5 g/L whereas for TiO2 maximum degradation was observed as 51.2% at a loading of 4 g/L over similar treatment period. Studies with presence of radical scavengers such as methanol (CH3OH) and n-butanol (C4H9OH) indicated lower extents of degradation confirming the dominance of radical mechanism. The combined approach of ultrasound, solid catalyst and scavengers has also been investigated at optimum loadings to simulate real conditions. The optimal solid loading was used for studies involving oxidation using UV irradiations where 26.4% and 28.9% of degradation was achieved at optimal loading of CuO and TiO2, respectively. Studies using combination of UV and US irradiations have also been carried out using the optimal concentration of the catalysts. It has been observed that maximum degradation of 63.3% is achieved using combined US and UV with TiO2 (4 g/L) as the photocatalyst. Overall it can be said that the combined processes give higher extent of degradation as compared to the individual processes based on US or UV irradiations.
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Affiliation(s)
- Nileema B Bokhale
- Department of Chemical Engineering, AISSMS College of Engineering, Kennedy Road, Near RTO, Pune 411001, India
| | - Snehal D Bomble
- Department of Chemical Engineering, AISSMS College of Engineering, Kennedy Road, Near RTO, Pune 411001, India
| | - Rachana R Dalbhanjan
- Department of Chemical Engineering, AISSMS College of Engineering, Kennedy Road, Near RTO, Pune 411001, India
| | - Deepika D Mahale
- Department of Chemical Engineering, AISSMS College of Engineering, Kennedy Road, Near RTO, Pune 411001, India
| | - Shruti P Hinge
- Department of Chemical Engineering, AISSMS College of Engineering, Kennedy Road, Near RTO, Pune 411001, India
| | - Barnali S Banerjee
- Department of Chemical Engineering, AISSMS College of Engineering, Kennedy Road, Near RTO, Pune 411001, India
| | - Ashish V Mohod
- Department of Chemical Engineering, AISSMS College of Engineering, Kennedy Road, Near RTO, Pune 411001, India.
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India.
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11
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Novelli M, Canistro D, Martano M, Funel N, Sapone A, Melega S, Masini M, De Tata V, Pippa A, Vecoli C, Campani D, De Siena R, Soleti A, Paolini M, Masiello P. Anti-diabetic properties of a non-conventional radical scavenger, as compared to pioglitazone and exendin-4, in streptozotocin-nicotinamide diabetic mice. Eur J Pharmacol 2014; 729:37-44. [PMID: 24530416 DOI: 10.1016/j.ejphar.2014.01.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Revised: 01/22/2014] [Accepted: 01/24/2014] [Indexed: 12/13/2022]
Abstract
We previously showed that the innovative radical scavenger bis(1-hydroxy-2,2,6,6-tetramethyl-4-piperidinyl)-decandioate (IAC) improves metabolic dysfunctions in a diabetic mouse model. Here, we compared the in vivo effects of IAC with those of the anti-diabetic drugs pioglitazone (PIO) and exendin-4 (EX-4). Diabetes was induced in C57Bl/6J mice by streptozotocin and nicotinamide administration. Paralleled by healthy controls, diabetic animals (D) were randomly assigned to four groups and treated daily for 7 consecutive weeks: D+saline, ip; D+IAC 30mg/kgb.w., ip; D+PIO 10mg/kgb.w. per os; and D+EX-4, 50μg/kgb.w., ip. Our results show that IAC reduced basal hyperglycemia and improved glucose tolerance better than PIO or EX-4. Interestingly, in the heart of diabetic mice, IAC treatment normalized the increased levels of GSSG/GSH ratio and thiobarbituric acid reactive substances, indexes of oxidative stress and damage, while PIO and EX-4 were less effective. As supported by immunohistochemical data, IAC markedly prevented diabetic islet β-cell reduced density, differently from PIO and EX-4 that had only a moderate effect. Interestingly, in diabetic animals, IAC treatment enhanced the activity of pancreatic-duodenal homeobox 1 (PDX-1), an oxidative stress-sensitive transcription factor essential for maintenance of β-cell function, as evaluated by quantification of its nuclear immunostaining, whereas PIO or EX-4 treatments did not. Altogether, these observations support the improvement of the general redox balance and β-cell function induced by IAC treatment in streptozotocin-nicotinamide diabetic mice. Furthermore, in this model, the correction of diabetic alterations was better obtained by treatment with the radical scavenger IAC than with pioglitazone or exendin-4.
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Affiliation(s)
- Michela Novelli
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, 56126 Pisa, Italy
| | - Donatella Canistro
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum, University of Bologna, Via Irnerio 48, 40126 Bologna, Italy
| | | | - Niccola Funel
- Department of Surgical, Medical, Molecular, and Critical Area Pathology, University of Pisa, Via Savi 10, 56126 Pisa, Italy
| | - Andrea Sapone
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum, University of Bologna, Via Irnerio 48, 40126 Bologna, Italy
| | - Simone Melega
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum, University of Bologna, Via Irnerio 48, 40126 Bologna, Italy
| | - Matilde Masini
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, 56126 Pisa, Italy
| | - Vincenzo De Tata
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, 56126 Pisa, Italy
| | - Anna Pippa
- Institute of Clinical Physiology, CNR, Via Moruzzi 1, 56124 Pisa, Italy
| | - Cecilia Vecoli
- Institute of Clinical Physiology, CNR, Via Moruzzi 1, 56124 Pisa, Italy
| | - Daniela Campani
- Department of Surgical, Medical, Molecular, and Critical Area Pathology, University of Pisa, Via Savi 10, 56126 Pisa, Italy
| | | | | | - Moreno Paolini
- Department of Pharmacy and Biotechnology, Alma Mater Studiorum, University of Bologna, Via Irnerio 48, 40126 Bologna, Italy
| | - Pellegrino Masiello
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via Roma 55, 56126 Pisa, Italy.
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Kannan RRR, Arumugam R, Anantharaman P. Pharmaceutical potential of a fucoidan-like sulphated polysaccharide isolated from Halodule pinifolia. Int J Biol Macromol 2013; 62:30-4. [PMID: 23962716 DOI: 10.1016/j.ijbiomac.2013.08.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 08/03/2013] [Accepted: 08/09/2013] [Indexed: 10/26/2022]
Abstract
In continuation with the screening of biological properties of seagrasses, we isolated sulphated polysaccharides from Halodule pinifolia. This is the first report that indicates the presence of fucoidan-like H. pinifolia crude sulphated polysaccharide (HPCSP) that are commonly found in brown algae being present in marine angiosperms. Fucoidan-like structures such as β-mannuronic acid residues and sulphate groups were confirmed by Fourier transform infrared (FTIR) spectral analysis. There was a high content of uronic acid. The isolated HPCSP consisted mainly of total sugar (54.17%), protein (11.06%), carbon (18.25%), nitrogen (1.77%), hydrogen (3.62%), C/N ratio (2.04%) and uronic acid (2.61%). This isolated HPCSP was further investigated to determine anticoagulant and antioxidant activity. The HPCSP had high activity in the total antioxidant assay (125.86 mg ascorbic acid equivalents/g), DPPH radical scavenging rate (IC50 value 2.024 ± 0.12 μg/mL), deoxyribose radical scavenging rate (51.82% at 1000 μg/mL) and H2O2 radical scavenging rate (IC50 value 6.904 ± 0.34 μg/mL). In the anticoagulant assay, prolonged clotting time was observed with application of HPCSP with increasing concentrations. Further purification and characterization process is underway to confirm the structures of HPCSP. From the observed results, this fucoidan-like HPCSP could be developed as a new natural source of potential antioxidants in the functional food industry.
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Affiliation(s)
- Rengasamy Ragupathi Raja Kannan
- Centre of Advanced Study in Marine Biology, Faculty of Marine Sciences, Annamalai University, Parangipettai 608 502, Tamil Nadu, India.
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