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Silva LAP, Campagnolo S, Fernandes SR, Marques SS, Barreiros L, Sampaio-Maia B, Segundo MA. Rapid and sustainable HPLC method for the determination of uremic toxins in human plasma samples. Anal Bioanal Chem 2023; 415:683-694. [PMID: 36464734 DOI: 10.1007/s00216-022-04458-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 11/04/2022] [Accepted: 11/22/2022] [Indexed: 12/11/2022]
Abstract
Protein-bound uremic toxins, mainly indoxyl sulfate (3-INDS), p-cresol sulfate (pCS), and indole-3-acetic acid (3-IAA) but also phenol (Pol) and p-cresol (pC), are progressively accumulated during chronic kidney disease (CKD). Their accurate measurement in biomatrices is demanded for timely diagnosis and adoption of appropriate therapeutic measures. Multianalyte methods allowing the establishment of a uremic metabolite profile are still missing. Hence, the aim of this work was to develop a rapid and sensitive method based on high-performance liquid chromatography with fluorescence detection for the simultaneous quantification of Pol, 3-IAA, pC, 3-INDS, and pCS in human plasma. Separation was attained in 12 min, using a monolithic C18 column and isocratic elution with acetonitrile and phosphate buffer containing an ion-pairing reagent, at a flow rate of 2 mL min-1. Standards were prepared in plasma and quantification was performed using the background subtraction approach. LOQ values were ≤ 0.2 µg mL-1 for all analytes except for pCS (LOQ of 2 µg mL-1). The method proved to be accurate (93.5-112%) and precise (CV ≤ 14.3%). The multianalyte application of the method, associated to a reduced sample volume (50 µL), a less toxic internal standard (eugenol) in comparison to the previously applied 2,6-dimethylphenol and 4-ethylphenol, and a green extraction solvent (ethanol), resulted in the AGREE score of 0.62 which is in line with the recent trend of green and sustainable analytical chemistry. The validated method was successfully applied to the analysis of plasma samples from control subjects exhibiting normal levels of uremic toxins and CKD patients presenting significantly higher levels of 3-IAA, pC, 3-INDS, and pCS that can be further investigated as biomarkers of disease progression.
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Affiliation(s)
- Luís A P Silva
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Stefano Campagnolo
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Sara R Fernandes
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal.,Escola Superior de Saúde, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 400, 4200-072, Porto, Portugal
| | - Sara S Marques
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Luisa Barreiros
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal. .,Escola Superior de Saúde, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 400, 4200-072, Porto, Portugal.
| | - Benedita Sampaio-Maia
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 280, 4200-135, Porto, Portugal.,INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Rua Alfredo Allen 280, 4200-135, Porto, Portugal.,Faculdade de Medicina Dentária, Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393, Porto, Portugal
| | - Marcela A Segundo
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
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Fernandes SR, Meireles AN, Marques SS, Silva L, Barreiros L, Sampaio-Maia B, Miró M, Segundo MA. Sample preparation and chromatographic methods for the determination of protein-bound uremic retention solutes in human biological samples: An overview. J Chromatogr B Analyt Technol Biomed Life Sci 2023; 1215:123578. [PMID: 36610265 DOI: 10.1016/j.jchromb.2022.123578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2022] [Revised: 12/12/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022]
Abstract
Protein-bound uremic retention solutes, such as indole-3-acetic acid, indoxyl sulfate, p-cresol and p-cresol sulfate, are associated with the development of several pathologies, namely renal, cardiovascular, and bone toxicities, due to their potential accumulation in the human body, thus requiring analytical methods for monitoring and evaluation. The present review addresses conventional and advanced sample treatment procedures for sample handling and the chromatographic analytical methods developed for quantification of these compounds in different biological fluids, with particular focus on plasma, serum, and urine. The sample preparation and chromatographic methods coupled to different detection systems are critically discussed, focusing on the different steps involved for sample treatment, namely elimination of interfering compounds present in the sample matrix, and the evaluation of their environmental impact through the AGREEprep tool. There is a clear trend for the application of liquid-chromatography coupled to tandem mass spectrometry, which requires protein precipitation, solid-phase extraction and/or dilution prior to analysis of biological samples. Furthermore, from a sustainability point of view, miniaturized methods resorting to microplate devices are highly recommended.
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Affiliation(s)
- Sara R Fernandes
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; Escola Superior de Saúde, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 400, 4200-072 Porto, Portugal
| | - Andreia N Meireles
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Sara S Marques
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Luís Silva
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Luisa Barreiros
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; Escola Superior de Saúde, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 400, 4200-072 Porto, Portugal.
| | - Benedita Sampaio-Maia
- Faculdade de Medicina Dentária, Universidade do Porto, Rua Dr. Manuel Pereira da Silva, 4200-393 Porto, Portugal; INEB - Instituto Nacional de Engenharia Biomédica / I3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Manuel Miró
- FI-TRACE group, Department of Chemistry, University of the Balearic Islands, 07122-Palma de Mallorca, Spain
| | - Marcela A Segundo
- LAQV, REQUIMTE, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal.
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Asgharian M, Gholizadeh P, Samadi Kafil H, Ghojazadeh M, Samadi A, Soleymani J, Jouyban A, Tayebi Khosroshahi H. Correlation of inflammatory biomarkers with the diversity of Bacteroidaceae, Bifidobacteriaceae, Prevotellaceae and Lactobacillaceae families in the intestinal microbiota of patients with end stage renal disease. Adv Med Sci 2022; 67:304-310. [PMID: 35994929 DOI: 10.1016/j.advms.2022.07.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 05/17/2022] [Accepted: 07/18/2022] [Indexed: 11/28/2022]
Abstract
PURPOSE Serum levels of inflammatory cytokines and uremic toxins, and their inter-correlations with the diversity of Bacteroidaceae, Bifidobacteriaceae, Prevotellaceae and Lactobacillaceae families in intestinal microbiota were investigated in patients with end stage renal disease (ESRD). METHODS Stool and blood samples from 20 ESRD patients on maintenance hemodialysis were collected. DNA genome of the bacterial composition of the stool samples was extracted and evaluated by the sequencing analysis of 16S rRNA genes. Serum levels of inflammatory cytokines and uremic toxins were then analyzed. RESULTS The mean serum concentrations of TNF-α, IL-6, indoxyl sulfate (IS) and p-cresol (PC) were 305.99 ± 12.03 ng/L, 159.95 ± 64.22 ng/L, 36.76 ± 5.09 μg/mL and 0.39 ± 0.15 μg/mL, respectively. The most significant positive correlation was observed between Prevotellaceae family and total antioxidant capacity (TAC), Lactobacilli species and CRP and PC, as well as Scardovia wiggsiae and IS (p < 0.001). A negative correlation was also found between Bacteroides clarus and PC. Patients with ESRD on maintenance hemodialysis had elevated levels of PC and IS and increased levels of the inflammatory markers. The most positive correlation was found between microbiota and CRP and PC, while the most negative one was between microbiota and IL-1 and TAC. CONCLUSIONS The abundance and diversity of Bacteroidaceae, Bifidobacteriaceae, Prevotellaceae and Lactobacillaceae families and their correlations with clinical parameters could provide benefits in the ESRD patients but they could not promote the symptoms.
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Affiliation(s)
- Mostafa Asgharian
- Kidney Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Pourya Gholizadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Samadi Kafil
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Morteza Ghojazadeh
- Neuroscience Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Azam Samadi
- Nutrition Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Jafar Soleymani
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Abolghasem Jouyban
- Pharmaceutical Analysis Research Center and Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran; Faculty of Pharmacy, Near East University, Nicosia, North Cyprus, Mersin, Turkey
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Wang W, Xu Y, Huang H, Pang Z, Fu Z, Niu J, Zhang C, Li W, Li X, Sun B. Correlation between microbial communities and flavor compounds during the fifth and sixth rounds of sauce-flavor baijiu fermentation. Food Res Int 2021; 150:110741. [PMID: 34865760 DOI: 10.1016/j.foodres.2021.110741] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 09/07/2021] [Accepted: 10/06/2021] [Indexed: 11/16/2022]
Abstract
Sauce-flavor baijiu is a representative of Chinese traditional fermented baijiu using grains as the raw materials through the co-fermentation of microorganisms. The whole manufacturing process includes 7 times of distillation and generates 7 kinds of base baijius. The final product is a mixture of the 7 kinds of base baijius. Thus the base baijius greatly affect the quality of the final product. The quality of the base baijiu obtained by the sixth distillation is obviously poorer than that of the fifth one. However, the reason is still unclear and limits the quality control of baijiu fermentation. In this study, the flavor substances and microbiota in the up, middle and bottom layers of fermented grains in the fifth and sixth rounds were compared. Some flavor esters showed obviously decreased concentrations in the sixth round, including ethyl benzoneacetic acid, ethyl hexanoic acid, ethyl dodecanoic acid, diethyl butanedioic acid, and ethyl 2-hydroxyl-propanoic acid. Meanwhile, an off-flavor p-cresol was detected in the sixth round. Correlation analysis of flavor chemicals and microbiota indicated that fungi in the fifth round played an important role for ester synthesis. Some bacterial and fungal species were both positively correlated with p-cresol synthesis, and the related p-cresol metabolic pathways were proposed for the first time. These results revealed flavor divergences of fermented grains between the fifth and sixth rounds, and will ultimately help to improve baijiu quality.
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Affiliation(s)
- Wenhua Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Youqiang Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Huiqin Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Zemin Pang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Zhilei Fu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Jialiang Niu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Chengnan Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Weiwei Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China
| | - Xiuting Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China.
| | - Baoguo Sun
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Technology and Business University, Beijing 100048, China.
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Blachier F, Andriamihaja M. Effects of the L-tyrosine-derived bacterial metabolite p-cresol on colonic and peripheral cells. Amino Acids 2021; 54:325-338. [PMID: 34468872 DOI: 10.1007/s00726-021-03064-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 08/06/2021] [Indexed: 11/28/2022]
Abstract
Specific families of bacteria present within the intestinal luminal content produce p-cresol from L-tyrosine. Although the hosts do not synthesize p-cresol, they can metabolize this compound within their colonic mucosa and liver leading to the production of co-metabolites including p-cresyl sulfate (p-CS) and p-cresyl glucuronide (p-CG). p-Cresol and its co-metabolites are recovered in the circulation mainly conjugated to albumin, but also in their free forms that are excreted in the urine. An increased dietary protein intake raises the amount of p-cresol recovered in the feces and urine, while fecal excretion of p-cresol is diminished by a diet containing undigestible polysaccharides. p-Cresol in excess is genotoxic for colonocytes. In addition, in these cells, this bacterial metabolite decreases mitochondrial oxygen consumption, while increasing the anion superoxide production. In chronic kidney disease (CKD), marked accumulation of p-cresol and p-CS in plasma is measured, and in renal tubular cells, p-cresol and p-CS increase oxidative stress, affect mitochondrial function, and lead to cell death, strongly suggesting that these 2 compounds act as uremic toxins that aggravate CKD progression. p-Cresol and p-CS are also suspected to play a role in the CKD-associated adverse cardiovascular events, since they affect endothelial cell proliferation and migration, decrease the capacity of endothelial wound repair, and increase the senescence of endothelial cells. Finally, the fact that concentration of p-cresol is transiently increased in young autistic children biological fluids, and that intraperitoneal injection of p-cresol in animal models induces some behavioral characteristics observed in the autism spectrum disorders (ASD), raise the view that p-cresol may possibly represent one of the components involved in ASD etiology. Further pre-clinical and clinical studies are obviously needed to determine if the lowering of p-cresol and/or p-CS circulating concentrations, by dietary and/or pharmacological means, would allow, by itself or in combination with other interventions, to improve CKD progression and associated cardiovascular outcomes, as well as some neurological outcomes in children with an early diagnosis of autism.
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Affiliation(s)
- F Blachier
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, Paris, France.
| | - M Andriamihaja
- Université Paris-Saclay, AgroParisTech, INRAE, UMR PNCA, Paris, France
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Bermudez-Martin P, Becker JAJ, Caramello N, Fernandez SP, Costa-Campos R, Canaguier J, Barbosa S, Martinez-Gili L, Myridakis A, Dumas ME, Bruneau A, Cherbuy C, Langella P, Callebert J, Launay JM, Chabry J, Barik J, Le Merrer J, Glaichenhaus N, Davidovic L. The microbial metabolite p-Cresol induces autistic-like behaviors in mice by remodeling the gut microbiota. Microbiome 2021; 9:157. [PMID: 34238386 PMCID: PMC8268286 DOI: 10.1186/s40168-021-01103-z] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/27/2021] [Indexed: 05/06/2023]
Abstract
BACKGROUND Autism spectrum disorders (ASD) are associated with dysregulation of the microbiota-gut-brain axis, changes in microbiota composition as well as in the fecal, serum, and urine levels of microbial metabolites. Yet a causal relationship between dysregulation of the microbiota-gut-brain axis and ASD remains to be demonstrated. Here, we hypothesized that the microbial metabolite p-Cresol, which is more abundant in ASD patients compared to neurotypical individuals, could induce ASD-like behavior in mice. RESULTS Mice exposed to p-Cresol for 4 weeks in drinking water presented social behavior deficits, stereotypies, and perseverative behaviors, but no changes in anxiety, locomotion, or cognition. Abnormal social behavior induced by p-Cresol was associated with decreased activity of central dopamine neurons involved in the social reward circuit. Further, p-Cresol induced changes in microbiota composition and social behavior deficits could be transferred from p-Cresol-treated mice to control mice by fecal microbiota transplantation (FMT). We also showed that mice transplanted with the microbiota of p-Cresol-treated mice exhibited increased fecal p-Cresol excretion, compared to mice transplanted with the microbiota of control mice. In addition, we identified possible p-Cresol bacterial producers. Lastly, the microbiota of control mice rescued social interactions, dopamine neurons excitability, and fecal p-Cresol levels when transplanted to p-Cresol-treated mice. CONCLUSIONS The microbial metabolite p-Cresol induces selectively ASD core behavioral symptoms in mice. Social behavior deficits induced by p-Cresol are dependant on changes in microbiota composition. Our study paves the way for therapeutic interventions targeting the microbiota and p-Cresol production to treat patients with ASD. Video abstract.
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Affiliation(s)
- Patricia Bermudez-Martin
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Jérôme A J Becker
- Physiologie de la Reproduction et des Comportements, UMR0075 INRAE, UMR7247 CNRS, IFCE, Inserm, Université François Rabelais, 37380, Nouzilly, France
- UMR 1253, iBrain, Université de Tours, Inserm, CNRS, Tours, 37200, France
| | - Nicolas Caramello
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
- Current address: Structural Biology, Radiation Facility, European Synchrotron, Grenoble, France
| | - Sebastian P Fernandez
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Renan Costa-Campos
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Juliette Canaguier
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Susana Barbosa
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Laura Martinez-Gili
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Antonis Myridakis
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
| | - Marc-Emmanuel Dumas
- Division of Systems Medicine, Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, SW7 2AZ, UK
- Genomic and Environmental Medicine, National Heart & Lung Institute, Faculty of Medicine, Imperial College London, London, SW3 6KY, UK
- European Genomic Institute for Diabetes, CNRS UMR 8199, INSERM UMR 1283, Institut Pasteur de Lille, Lille University Hospital, University of Lille, 59045, Lille, France
- McGill University and Genome Quebec Innovation Centre, 740 Doctor Penfield Avenue, Montréal, QC, H3A 0G1, Canada
| | - Aurélia Bruneau
- AgroParisTech, INRAE, Institut Micalis, Université Paris-Saclay, Jouy-en-Josas, France
| | - Claire Cherbuy
- AgroParisTech, INRAE, Institut Micalis, Université Paris-Saclay, Jouy-en-Josas, France
| | - Philippe Langella
- AgroParisTech, INRAE, Institut Micalis, Université Paris-Saclay, Jouy-en-Josas, France
| | - Jacques Callebert
- UMR-S 942, INSERM, Department of Biochemistry, Lariboisière Hospital, Paris, France
- Centre for Biological Resources, BB-0033-00064, Lariboisière Hospital, Paris, France
| | - Jean-Marie Launay
- UMR-S 942, INSERM, Department of Biochemistry, Lariboisière Hospital, Paris, France
- Centre for Biological Resources, BB-0033-00064, Lariboisière Hospital, Paris, France
| | - Joëlle Chabry
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Jacques Barik
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
| | - Julie Le Merrer
- Physiologie de la Reproduction et des Comportements, UMR0075 INRAE, UMR7247 CNRS, IFCE, Inserm, Université François Rabelais, 37380, Nouzilly, France
- UMR 1253, iBrain, Université de Tours, Inserm, CNRS, Tours, 37200, France
| | - Nicolas Glaichenhaus
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France
- Fondation FondaMental, Créteil, France
| | - Laetitia Davidovic
- Institut de Pharmacologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Université Côte d'Azur, 660 route des Lucioles, 06560, Valbonne, France.
- Fondation FondaMental, Créteil, France.
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Gasaly N, Gotteland M. Interference of dietary polyphenols with potentially toxic amino acid metabolites derived from the colonic microbiota. Amino Acids 2021. [PMID: 34235577 DOI: 10.1007/s00726-021-03034-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 06/24/2021] [Indexed: 02/07/2023]
Abstract
Each day, varying amounts of undigested or partially digested proteins reach the colon where they are metabolized by the microbiota, resulting in the formation of compounds such as ammonia, p-cresol, skatole, phenol, indole, and hydrogen sulfide (H2S). In farm animals, the excessive production of these metabolites can affect the quality of meat and milk and is a source of contaminating emissions from animal manure. In humans, their accumulation is potentially harmful, and it has been proposed that they could be involved in the development of pathologies such as colorectal cancer and ulcerative colitis, among others. This review assesses the evidence supporting the use of dietary polyphenols to reduce the production of these metabolites. Most studies have used condensed (proanthocyanidins) or hydrolyzable (ellagitannins and gallotannins) tannins, and have been carried out in farm animals. Several show that the administration of tannins in pigs, chicken, and ruminants decreases the levels of ammonia, p-cresol, skatole, and/or H2S, improving meat/milk quality and reducing manure odor. Direct application of tannins to manure also decreases ammonia emissions. Few studies were carried out in rats and humans and their results confirm, to a lesser extent, those reported in farm animals. These effects would be due to the capacity of tannins to trap ammonia and H2S, and to modify the composition of the microbiota, reducing the bacterial populations producing metabolites. In addition, PACs prevent p-cresol and H2S-induced alterations on intestinal cells in vitro. Tannins, therefore, appear as an interesting tool for improving the quality of animal products, human health, and the harmful emissions associated with breeding.
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Zhao K, Veksha A, Ge L, Lisak G. Near real-time analysis of para-cresol in wastewater with a laccase-carbon nanotube-based biosensor. Chemosphere 2021; 269:128699. [PMID: 33121813 DOI: 10.1016/j.chemosphere.2020.128699] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/13/2020] [Accepted: 10/16/2020] [Indexed: 06/11/2023]
Abstract
Para-Cresol is a water-soluble organic pollutant, which is harmful to organisms even at low concentrations. Therefore, it is important to rapidly detect the p-cresol in wastewater as well as natural water. In this work, a new, simple and stable biosensor was developed for on-site quantitatively determination and near real-time monitoring p-cresol in wastewater. The new biosensor was designed and fabricated using a screen-printed carbon electrode (SPCE) modified by waste-derived carbon nanotubes (CNTs) immobilized with laccase (LAC). The fabrication processes and performance of the biosensors were systematically characterized and optimized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscope (FESEM), transmission electron microscopy (TEM) and electrochemical methods. With improved conductivity, the proposed biosensor could provide the direct quantitation of p-cresol. The linear range of the biosensor is 0.2-25 ppm of p-cresol with a detection limit of 0.05 ppm. Additionally, the biosensor exhibited high reproducibility, stability and reusability during the validation. More importantly, the biosensor was successfully applied for the rapid detection of p-cresol in environmental lab wastewater under the interference of metal ions and other organics, and the results were consistent with high-performance liquid chromatography (HPLC). Finally, the biosensor with a portable potentiostat was approved as an easy-to-use, sensitive and inexpensive platform that could provide near real-time monitoring of p-cresol concentration in wastewater during Fenton oxidation treatment process.
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Affiliation(s)
- Ke Zhao
- Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One, 637141, Singapore
| | - Andrei Veksha
- Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One, 637141, Singapore
| | - Liya Ge
- Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One, 637141, Singapore.
| | - Grzegorz Lisak
- Residues and Resource Reclamation Centre (R3C), Nanyang Environment and Water Research Institute, Nanyang Technological University, 1 Cleantech Loop, Clean Tech One, 637141, Singapore; School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
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9
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Aziz FFA, Jalil AA, Hassan NS, Hitam CNC, Rahman AFA, Fauzi AA. Enhanced visible-light driven multi-photoredox Cr(VI) and p-cresol by Si and Zr interplay in fibrous silica-zirconia. J Hazard Mater 2021; 401:123277. [PMID: 33113710 DOI: 10.1016/j.jhazmat.2020.123277] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 05/19/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
Multiple contaminants including heavy metals and phenolic compounds are normally co-exist in wastewater, which caused the treatment process is rather complicated. Herein, the synergistic photoredox of Cr(VI) and p-cresol (pC) by innovative fibrous silica zirconia (FSZr) photocatalyst was reported. The high surface area of FSZr comprised of microspheres with a bicontinuous concentric lamella structure morphology consisted of silica, while its core consisted of ZrO2 structure. The rearrangement of FSZr framework increased the crystallinity, formed Si-O-Zr bonds and narrowed the band gap of ZrO2 for enhanced of photoredox of Cr(VI) and pC. Compared to the reaction, the photoredox efficiency of FSZr for removing Cr(VI) and pC in simultaneous system was found to be 96 % and 59 %, respectively which are higher than that in its single system owing to the efficient electron-hole charge separation. Phenolic compound with high degree of electron donating group gave beneficial effect to photoreduction of Cr(VI). Consequently, a proposed mechanism involving multi-photoredox pathway were proposed based on photoredox reaction and scavengers studies. FSZr sustained the simultaneous photoredox activities after five runs demonstrating its possibility to be use in the wastewater treatment of various pollutants.
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Affiliation(s)
- F F A Aziz
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia
| | - A A Jalil
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310 UTM, Johor Bahru, Johor, Malaysia.
| | - N S Hassan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia
| | - C N C Hitam
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia
| | - A F A Rahman
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia
| | - A A Fauzi
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Johor Bahru, Johor, Malaysia
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10
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Shim J, Kumar M, Goswami R, Mazumder P, Oh BT, Shea PJ. Removal of p-cresol and tylosin from water using a novel composite of alginate, recycled MnO 2 and activated carbon. J Hazard Mater 2019; 364:419-428. [PMID: 30384252 DOI: 10.1016/j.jhazmat.2018.09.065] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 08/22/2018] [Accepted: 09/25/2018] [Indexed: 05/12/2023]
Abstract
For sustainable production, there is an urgent need to minimize the adverse environmental impacts of swine farming, which is a major contributor of the pollutants p-cresol and tylosin. Novel reactive composite alginate beads (CAB-MOACs) were fabricated by combining alginate with activated carbon (AC) and MnO2 recovered from spent battery waste and used for efficient removal of p-cresol and tylosin from water. Batch experiments were carried out under varying pH (3-11), temperature (15-50 °C), and agitation speed (50-200 rpm) to understand their effects on removal efficiency. The CAB-MOACs had better removal efficiency for p-cresol and tylosin than alginate beads alone or beads containing only AC or MnO2. Adsorption to CAB-MOACs followed pseudo-second-order kinetics (R2≥0.98) and Langmuir isotherm models (R2≥0.95). CAB-MOACs showed higher removal efficiency (∼99.9% after 10 h) compared to beads containing only immobilized MnO2 (60-70%) or AC (94-96%). Regeneration and reuse performance of the CAB-MOACs was excellent through five cycles, although slightly better for p-cresol than tylosin. With low-cost manufacturing and beneficial utilization of hazardous waste such as spent batteries, the newly developed composite beads show potential as an effective adsorbent for treating wastewater effluent containing emerging contaminants like p-cresol and tylosin. Future studies may focus on product refinement and large-scale testing on actual wastewaters.
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Affiliation(s)
- Jaehong Shim
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea
| | - Manish Kumar
- Discipline of Earth Sciences, Indian Institute of Technology Gandhinagar, Palaj, Gujarat-382355, India.
| | - Ritusmita Goswami
- Discipline of Earth Sciences, Indian Institute of Technology Gandhinagar, Palaj, Gujarat-382355, India
| | - Payal Mazumder
- Centre for Environment, Indian Institute of Technology Guwahati, North Guwahati, Assam, 781039, India
| | - Byung-Taek Oh
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea
| | - Patrick J Shea
- School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE, USA
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11
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Korytowska N, Wyczałkowska-Tomasik A, Wiśniewska A, Pączek L, Giebułtowicz J. Development of the LC-MS/MS method for determining the p-cresol level in plasma. J Pharm Biomed Anal 2019; 167:149-54. [PMID: 30772758 DOI: 10.1016/j.jpba.2019.01.041] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 01/12/2019] [Accepted: 01/25/2019] [Indexed: 01/22/2023]
Abstract
p-Cresol is a protein-bound uremic retention solute that originates in the intestine through bacterial metabolism and accumulates throughout the body in case of kidney failure. To date, there has been no method to analyze unconjugated p-cresol concentration in the blood with a limit of detection lower than 75 pg. Thus, the aim of this study was to develop and validate a novel liquid chromatography-tandem mass spectrometry method for the determination of unconjugated p-cresol in plasma with a lower detection limit than what has been determined using previously described methods. Sample preparation included derivatization of p-cresol with dansyl chloride (derivatization reagent) showed to be a better approach to analyze the compound. The method optimization involved various pH, time of the reaction, and concentration of derivatization reagent. The validation process was performed according to the procedures prescribed by the European Medicines Agency. All analyzed validation criteria were fulfilled. The novel validated method was applied to compare the level of p-cresol in patients with chronic renal failure before and after dialysis (n = 24). Additionally, the concentration of p-cresol was determined in patients with multiple organ dysfunction syndrome (n = 23). The established method can be used for determination of p-cresol in the plasma in further clinical research.
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Burkina V, Sakalli S, Zlabek V, Zamaratskaia G. CYP1A1 activity in rainbow trout is inhibited by the environmental pollutant p-cresol. Environ Toxicol Pharmacol 2018; 62:199-202. [PMID: 30077163 DOI: 10.1016/j.etap.2018.07.013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 05/15/2018] [Revised: 07/12/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
Naturally- and anthropogenically-produced cresols could pose serious risks to fish health. In this study, three piscine CYP isoforms were investigated for their abilities to interact with p-cresol. Therefore, the activity of 7-ethoxyresorufin-O-deethylase (EROD), 7-benzyloxy-4-trifluoromethylcoumarin O-debenzylase (BFCOD), and p-nitrophenol hydroxylase (PNPH) were evaluated in the hepatic microsomes of juvenile rainbow trout. Results showed that EROD activity was inhibited in a competitive manner, BFCOD activity was inhibited in presence the highest tested p-cresol concentration and PNPH activity was not affected. These results indicate that p-cresol might affect the ability of fish to metabolize numerous aromatic hydrocarbons and dioxin compounds, which are present in the aquatic environment.
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Affiliation(s)
- Viktoriia Burkina
- University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zatisi 728/II, 389 25, Vodnany, Czech Republic; Swedish University of Agricultural Sciences, Department of Molecular Science, P.O. Box 7015, SE-750 07, Uppsala, Sweden.
| | - Sidika Sakalli
- University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zatisi 728/II, 389 25, Vodnany, Czech Republic
| | - Vladimir Zlabek
- University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zatisi 728/II, 389 25, Vodnany, Czech Republic
| | - Galia Zamaratskaia
- University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, Zatisi 728/II, 389 25, Vodnany, Czech Republic; Swedish University of Agricultural Sciences, Department of Molecular Science, P.O. Box 7015, SE-750 07, Uppsala, Sweden
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Yun SP, Han YS, Lee JH, Kim SM, Lee SH. Melatonin Rescues Mesenchymal Stem Cells from Senescence Induced by the Uremic Toxin p-Cresol via Inhibiting mTOR-Dependent Autophagy. Biomol Ther (Seoul) 2018; 26:389-398. [PMID: 28655071 PMCID: PMC6029684 DOI: 10.4062/biomolther.2017.071] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 04/22/2017] [Accepted: 04/26/2017] [Indexed: 12/19/2022] Open
Abstract
p-Cresol, found at high concentrations in the serum of chronic kidney failure patients, is known to cause cell senescence and other complications in different parts of the body. p-Cresol is thought to mediate cytotoxic effects through the induction of autophagy response. However, toxic effects of p-cresol on mesenchymal stem cells have not been elucidated. Thus, we aimed to investigate whether p-cresol induces senescence of mesenchymal stem cells, and whether melatonin can ameliorate abnormal autophagy response caused by p-cresol. We found that p-cresol concentration-dependently reduced proliferation of mesenchymal stem cells. Pretreatment with melatonin prevented pro-senescence effects of p-cresol on mesenchymal stem cells. We found that by inducing phosphorylation of Akt and activating the Akt signaling pathway, melatonin enhanced catalase activity and thereby inhibited the accumulation of reactive oxygen species induced by p-cresol in mesenchymal stem cells, ultimately preventing abnormal activation of autophagy. Furthermore, preincubation with melatonin counteracted other pro-senescence changes caused by p-cresol, such as the increase in total 5′-AMP-activated protein kinase expression and decrease in the level of phosphorylated mechanistic target of rapamycin. Ultimately, we discovered that melatonin restored the expression of senescence marker protein 30, which is normally suppressed because of the induction of the autophagy pathway in chronic kidney failure patients by p-cresol. Our findings suggest that stem cell senescence in patients with chronic kidney failure could be potentially rescued by the administration of melatonin, which grants this hormone a novel therapeutic role.
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Affiliation(s)
- Seung Pil Yun
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Yong-Seok Han
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul 04401, Republic of Korea
| | - Jun Hee Lee
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham School of Medicine, Birmingham, AL 35294, USA
| | - Sang Min Kim
- Neuroregeneration and Stem Cell Programs, Institute for Cell Engineering, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Sang Hun Lee
- Medical Science Research Institute, Soonchunhyang University Seoul Hospital, Seoul 04401, Republic of Korea
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Shiba T, Makino I, Sasaki T, Fukuhara Y, Kawakami K, Kato I, Kobayashi T. p-Cresyl sulfate decreases peripheral B cells in mice with adenine-induced renal dysfunction. Toxicol Appl Pharmacol 2018; 342:50-59. [PMID: 29407365 DOI: 10.1016/j.taap.2018.01.025] [Citation(s) in RCA: 8] [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: 11/17/2017] [Revised: 01/24/2018] [Accepted: 01/29/2018] [Indexed: 12/29/2022]
Abstract
Infection is a major cause of mortality in chronic kidney disease (CKD) patients. Although immune dysfunction is a risk factor for infection in CKD patients, its causes are not fully elucidated. In the present study, we evaluated whether p-cresyl sulfate (pCS), an intestinal bacteria-derived uremic toxin, was involved in immune dysfunction in CKD. We used osmotic pumps to establish adenine-induced renal dysfunction mice with a chronically high blood pCS concentration. Analysis of lymphocyte subsets revealed that pCS significantly reduced peripheral B cells in renal dysfunction mice. In vitro, pCS inhibited interleukin (IL)-7-induced proliferation of CD43+ B-cell progenitors and suppressed IL-7-induced phosphorylation of signal transducer and activator of transcription 5 (STAT5) in these cells. Cell cycle analysis showed that pCS significantly decreased the percentage of CD43+ B-cell progenitors in S phase and increased that in G1 phase. These results suggest that pCS suppressed IL-7-induced STAT5 signaling and inhibited B-cell progenitor proliferation, leading to reduction of peripheral B cells in adenine-induced renal dysfunction mice. Therefore, pCS decreases peripheral B cells by inhibiting proliferation of CD43+ B-cell progenitors and is a likely cause of immune dysfunction in CKD patients.
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Affiliation(s)
- Takahiro Shiba
- Yakult Central Institute, 5-11 Izumi, Kunitachi-Shi, Tokyo 186-8650, Japan.
| | - Ikuyo Makino
- Yakult Central Institute, 5-11 Izumi, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Takashi Sasaki
- Yakult Central Institute, 5-11 Izumi, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Yuji Fukuhara
- Yakult Central Institute, 5-11 Izumi, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Koji Kawakami
- Yakult Central Institute, 5-11 Izumi, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Ikuo Kato
- Yakult Central Institute, 5-11 Izumi, Kunitachi-Shi, Tokyo 186-8650, Japan
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Singh T, Srivastava N, Bhatiya AK, Mishra PK. Analytical study of effective biodegradation of p-cresol using Serratia marcescens ABHI001: application in bioremediation. 3 Biotech 2017; 7:384. [PMID: 29142804 DOI: 10.1007/s13205-017-1006-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 10/09/2017] [Indexed: 10/18/2022] Open
Abstract
This study evaluated the capability of Serratia marcescens ABHI001 to effectively degrade p-cresol through different techniques. The molecular identity of the laboratory isolate S. marcescens ABHI001 was confirmed through the 16S ribosomal DNA gene pattern, and its morphological features were investigated through field-emission scanning electron microscopy. In addition, the degradation behavior of the isolate for cresol was verified using several techniques, including UV-visible spectroscopy, followed by high-performance liquid chromatography (HPLC), gas chromatography, and Fourier transform infrared spectroscopy. The maximum degradation percentage of 85% for p-cresol could be achieved after 18 h of incubation with S. marcescens ABHI001. The formation of p-hydroxybenzaldehyde, p-hydroxybenzoate, and protocatechuate metabolites was confirmed through HPLC. The study results indicate that S. marcescens ABHI001 may have applications in the bioremediation of organic pollutants, such as p-cresol.
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Riccio E, Sabbatini M, Bruzzese D, Grumetto L, Marchetiello C, Amicone M, Andreucci M, Guida B, Passaretti D, Russo G, Pisani A. Plasma p-cresol lowering effect of sevelamer in non-dialysis CKD patients: evidence from a randomized controlled trial. Clin Exp Nephrol 2017; 22:529-538. [PMID: 29159529 DOI: 10.1007/s10157-017-1504-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 06/12/2017] [Accepted: 10/31/2017] [Indexed: 12/22/2022]
Abstract
BACKGROUND The accumulation of p-cresol, a metabolic product of aromatic amino acids generated by intestinal microbiome, increases the cardiovascular risk in chronic kidney disease (CKD) patients. Therefore, therapeutic strategies to reduce plasma p-cresol levels are highly demanded. It has been reported that the phosphate binder sevelamer (SEV) sequesters p-cresol in vitro, while in vivo studies on dialysis patients showed controversial results. Aim of our study was to evaluate the effect of SEV on p-cresol levels in non-dialysis CKD patients. METHODS This was a single-blind, randomized placebo-controlled trial (Registration number NCT02199444) carried on 69 CKD patients (stage 3-5, not on dialysis), randomly assigned (1:1) to receive either SEV or placebo for 3 months. Total p-cresol serum levels were evaluated at baseline (T0), and 1 (T1) and 3 months (T3) after treatment start. The primary end-point was to evaluate the effect of SEV on p-cresol levels. RESULTS Compared to baseline (T0, 7.4 ± 2.7 mg/mL), p-cresol mean concentration was significantly reduced in SEV patients after one (- 2.06 mg/mL, 95% CI - 2.62 to - 1.50 mg/mL; p < 0.001) and 3 months of treatment (- 3.97 mg/mL, 95% CI - 4.53 to - 3.41 mg/mL; p < 0.001); no change of plasma p-cresol concentration was recorded in placebo-treated patients. Moreover, P and LDL values were reduced after 3 months of treatment by SEV but not placebo. CONCLUSIONS In conclusion, our study represents the first evidence that SEV is effective in reducing p-cresol levels in CKD patients in conservative treatment, and confirms its beneficial effects on inflammation and lipid pattern.
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Affiliation(s)
- Eleonora Riccio
- Department of Nephrology, Second University of Naples, Naples, Italy.
| | - Massimo Sabbatini
- Chair of Nephrology, Department of Public Health, Federico II University of Naples, Naples, Italy
| | - Dario Bruzzese
- Chair of Statistics, Department of Public Health, Federico II University of Naples, Naples, Italy
| | - Lucia Grumetto
- Department of Pharmacy, School of Medicine and Surgery, Federico II University of Naples, Naples, Italy
| | - Cristina Marchetiello
- Chair of Nephrology, Department of Public Health, Federico II University of Naples, Naples, Italy
| | - Maria Amicone
- Chair of Nephrology, Department of Public Health, Federico II University of Naples, Naples, Italy
| | - Michele Andreucci
- Unit of Nephrology, Department of Health Sciences, "Magna Graecia" University, Catanzaro, Italy
| | - Bruna Guida
- Division of Physiology, Department of Clinical Medicine and Surgery, Federico II University of Naples, Naples, Italy
| | - Davide Passaretti
- Department of Economics and Law, University of Cassino and Southern Lazio, Cassino, Italy
| | - Giacomo Russo
- Department of Pharmacy, School of Medicine and Surgery, Federico II University of Naples, Naples, Italy
| | - Antonio Pisani
- Chair of Nephrology, Department of Public Health, Federico II University of Naples, Naples, Italy
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Guida B, Cataldi M, Memoli A, Trio R, di Maro M, Grumetto L, Capuano I, Federico S, Pisani A, Sabbatini M. Effect of a Short-Course Treatment with Synbiotics on Plasma p-Cresol Concentration in Kidney Transplant Recipients. J Am Coll Nutr 2017; 36:586-591. [PMID: 28895794 DOI: 10.1080/07315724.2017.1334602] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVE We evaluated whether a short-term course with synbiotics may lower plasma p-Cresol concentrations in kidney transplant patients (KTRs) who accumulate this uremic toxin both because of increased production by their dysbiotic gut microbiome and because of reduced elimination by the transplanted kidneys. METHODS Thirty-six KTRs (29 males, mean age 49.6 ± 9.1 years) with transplant vintage > 12 months, stable graft function, and no episode of acute rejection or infection in the last 3 months were enrolled in this single-center, parallel-group, double-blinded, randomized (2:1 synbiotic to placebo) study. Synbiotic (Probinul Neutro, CadiGroup, Rome, Italy) or placebo was taken at home for 30 days, as 5 g powder packets dissolved in water three times a day far from meals. The main outcome measure was the decrease in total plasma p-Cresol measured by high-performance liquid chromatography at baseline and after 15 and 30 days of placebo or synbiotic treatment. RESULTS After 15 and 30 days of treatment, plasma p-Cresol decreased by 40% and 33% from baseline (both p < 0.05), respectively, in the synbiotic group, whereas it remained stable in the placebo group. After 30 days of treatment, no significant change was observed in either group in renal function, glycemia, plasma lipids, or albumin concentration. Treatment was well tolerated and did not induce any change in stool characteristics. CONCLUSION The results of this pilot study suggest that treatment with synbiotics may be effective to lower plasma p-Cresol concentrations in KTRs. Prospective larger scale, longer term studies are needed to establish whether cardiovascular prognosis could also be improved with this nutritional intervention.
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Affiliation(s)
- Bruna Guida
- a Department of Clinical Medicine and Surgery, Physiology Nutrition Unit , Federico II University of Naples , Naples , Italy.,b Federico II University Hospital , Naples , Italy
| | - Mauro Cataldi
- b Federico II University Hospital , Naples , Italy.,c Department of Neuroscience, Reproductive Sciences and Dentistry, Division of Pharmacology , Federico II University of Naples , Naples , Italy
| | - Andrea Memoli
- b Federico II University Hospital , Naples , Italy.,d Department of Public Health, Nephrology Section , Federico II University of Naples , Naples , Italy
| | | | - Martina di Maro
- a Department of Clinical Medicine and Surgery, Physiology Nutrition Unit , Federico II University of Naples , Naples , Italy.,b Federico II University Hospital , Naples , Italy
| | - Lucia Grumetto
- e Department of Pharmaceutical and Toxicological Chemistry , Federico II University of Naples , Naples , Italy
| | - Ivana Capuano
- b Federico II University Hospital , Naples , Italy.,d Department of Public Health, Nephrology Section , Federico II University of Naples , Naples , Italy
| | - Stefano Federico
- b Federico II University Hospital , Naples , Italy.,d Department of Public Health, Nephrology Section , Federico II University of Naples , Naples , Italy
| | - Antonio Pisani
- b Federico II University Hospital , Naples , Italy.,d Department of Public Health, Nephrology Section , Federico II University of Naples , Naples , Italy
| | - Massimo Sabbatini
- b Federico II University Hospital , Naples , Italy.,d Department of Public Health, Nephrology Section , Federico II University of Naples , Naples , Italy
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18
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Escudero CJ, Iglesias O, Dominguez S, Rivero MJ, Ortiz I. Performance of electrochemical oxidation and photocatalysis in terms of kinetics and energy consumption. New insights into the p-cresol degradation. J Environ Manage 2017; 195:117-124. [PMID: 27157700 DOI: 10.1016/j.jenvman.2016.04.049] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 04/20/2016] [Accepted: 04/24/2016] [Indexed: 05/11/2023]
Abstract
This work reports the comparative performance of two Advanced Oxidation Processes (AOPs), electrochemical oxidation and photocatalysis, as individual technological alternatives for the treatment of effluents containing p-cresol. First, the influence of operating parameters in the oxidation and mineralization yield was carried out together with kinetic analysis. Boron Doped Diamond (BDD), RuO2 and Pt as anodic materials, Na2SO4 and NaCl as supporting electrolytes and different current densities were evaluated in electrochemical oxidation whereas the effect of TiO2 concentration and radiation was studied in the photocatalytic degradation. Then, the parameter Electrical Energy per Order (EEO) was calculated to compare the energy consumption in both AOPs, concluding that under the studied conditions the electrochemical treatment with BDD, Na2SO4 and 125 A m-2 showed the best energy efficiency, with an EEO of 5.83 kW h m-3 order-1 for p-cresol and 58.05 kW h m-3 order-1 for DOC removal, respectively.
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Affiliation(s)
- Carlos J Escudero
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. de los Castros s/n, 39005, Santander, Spain
| | - Olalla Iglesias
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. de los Castros s/n, 39005, Santander, Spain
| | - Sara Dominguez
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. de los Castros s/n, 39005, Santander, Spain
| | - Maria J Rivero
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. de los Castros s/n, 39005, Santander, Spain
| | - Inmaculada Ortiz
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. de los Castros s/n, 39005, Santander, Spain.
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Edalli VA, Mulla SI, Eqani SAMAS, Mahadevan GD, Sharma R, Shouche Y, Kamanavalli CM. Evaluation of p-cresol degradation with polyphenol oxidase (PPO) immobilized in various matrices. 3 Biotech 2016; 6:229. [PMID: 28330301 PMCID: PMC5082039 DOI: 10.1007/s13205-016-0547-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 10/12/2016] [Indexed: 12/07/2022] Open
Abstract
p-Cresol is an environmental pollutant due to its vast use, toxicity and persistence, nevertheless, its degradation in an enzyme is unclear. In this study, we used Pleurotus sp. isolate VLECK02 polyphenol oxidase (PPO) for the determination of p-cresol degradation. On the basis of UV, FT-IR and chromatographic (HPLC and GC–MS) analysis, 4-methylcatechol was identified as the main metabolite of p-cresol catabolism. In addition, batch and semi-continuous degradation of p-cresol (10 and 20 mM) were studied and compared by free and immobilized PPO in different matrices like sodium alginate (SA), sodium alginate–polyvinyl alcohol (SA–PVA) and sodium alginate–polyvinyl alcohol–silver nanoparticles (SA–PVA–AgNPs). The experimental data showed that an enzyme (PPO) immobilized in SA–PVA–AgNPs was completely degraded p-cresol at initial concentrations of 10 and 20 mM within 30 h. These results suggest that the enzyme immobilized in SA–PVA–AgNPs has achieved higher degradation rates at a given time than free PPO and PPO immobilized in SA–PVA and SA. The SA–PVA–AgNPs and SA–PVA immobilized enzyme could be reused for more than 12 and 8 cycles, respectively, without losing any degradation capacity. Moreover, the immobilized PPO showed higher tolerance to various temperatures and pH than free PPO. Hence, immobilized PPO could be useful for the bioremediation of environment contaminated with phenolic compounds like p-cresol.
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Affiliation(s)
| | - Sikandar I Mulla
- Department of Biochemistry, Karnatak University, Dharwad, Karnataka, 580 003, India
| | | | - Gurumurthy D Mahadevan
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Rohit Sharma
- National Center for Cell Science, University of Pune, Ganeshkhind, Pune, 411007, India
| | - Yogesh Shouche
- National Center for Cell Science, University of Pune, Ganeshkhind, Pune, 411007, India
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Stressler T, Leisibach D, Lutz-Wahl S, Kuhn A, Fischer L. Homologous expression and biochemical characterization of the arylsulfatase from Kluyveromyces lactis and its relevance in milk processing. Appl Microbiol Biotechnol 2016; 100:5401-14. [PMID: 26875879 DOI: 10.1007/s00253-016-7366-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [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: 11/09/2015] [Revised: 01/21/2016] [Accepted: 01/30/2016] [Indexed: 11/24/2022]
Abstract
The industrial manufacturing process of lactose-free milk products depends on the application of commercial β-galactosidase (lactase) preparations. These preparations are often obtained from Kluyveromyces lactis. There is a gene present in the genome of K. lactis which should encode for an enzyme called arylsulfatase (EC 3.1.6.1). Therefore, this enzyme could also be present in β-galactosidase preparations. The arylsulfatase is suspected of being responsible for an unpleasant "cowshed-like" off-flavor resulting from the release of p-cresol from milk endogenous alkylphenol sulfuric esters. So far, no gene/functionality relationship is described. In addition, no study is available which has shown that arylsulfatase from K. lactis is truly responsible for the flavor generation. In this study, we cloned the putative arylsulfatase gene from K. lactis GG799 into the commercially available vector pKLAC2. The cloning strategy chosen resulted in a homologous, secretory expression of the arylsulfatase. We showed that the heretofore putative arylsulfatase has the desired activity with the synthetic substrate p-nitrophenyl sulfate and with the natural substrate p-cresol sulfate. The enzyme was biochemically characterized and showed an optimum temperature of 45-50 °C and an optimum pH of 9-10. Additionally, the arylsulfatase was activated by Ca(2+) ions and was inactivated by Zn(2+) ions. Moreover, the arylsulfatase was inhibited by p-cresol and sulfate ions. Finally, the enzyme was added to ultra-heat treated (UHT) milk and a sensory triangle test verified that the arylsulfatase from K. lactis can cause an unpleasant "cowshed-like" off-flavor.
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Affiliation(s)
- Timo Stressler
- Institute of Food Science and Biotechnology, Department of Biotechnology and Enzyme Science, University of Hohenheim, Garbenstr. 25, 70599, Stuttgart, Germany.
| | - Desirée Leisibach
- Institute of Food Science and Biotechnology, Department of Biotechnology and Enzyme Science, University of Hohenheim, Garbenstr. 25, 70599, Stuttgart, Germany
| | - Sabine Lutz-Wahl
- Institute of Food Science and Biotechnology, Department of Biotechnology and Enzyme Science, University of Hohenheim, Garbenstr. 25, 70599, Stuttgart, Germany
| | - Andreas Kuhn
- Institute of Microbiology, University of Hohenheim, Garbenstr. 30, 70599, Stuttgart, Germany
| | - Lutz Fischer
- Institute of Food Science and Biotechnology, Department of Biotechnology and Enzyme Science, University of Hohenheim, Garbenstr. 25, 70599, Stuttgart, Germany
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Noh H, Yu MR, Kim HJ, Jang EJ, Hwang ES, Jeon JS, Kwon SH, Han DC. Uremic toxin p-cresol induces Akt-pathway-selective insulin resistance in bone marrow-derived mesenchymal stem cells. Stem Cells 2015; 32:2443-53. [PMID: 24805773 DOI: 10.1002/stem.1738] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 04/04/2014] [Accepted: 04/11/2014] [Indexed: 11/06/2022]
Abstract
We reported a functional incompetence in mesenchymal stem cells (MSCs) under uremia, but the mechanisms have not been explored. To study the mechanisms of dysfunctional MSCs induced by uremia, we characterized insulin signaling in MSCs and investigated the effect of uremic toxin, p-cresol, on the proangiogenic actions of insulin. In MSCs, insulin induced hypoxia-inducible factor (HIF)-1α, vascular endothelial growth factor, and stromal cell-derived factor 1α expressions via PI3K/Akt-dependent pathway. MSCs treated with p-cresol exhibited altered insulin signaling in a selective manner for insulin receptor substrate-1/PI3K/Akt pathway, whereas ERK pathway remained active. The insulin-induced increase of HIF-1α was blunted by p-cresol treatment. This Akt-selective insulin resistance was also observed in MSCs isolated from chronic kidney disease (CKD) mice. In mice model of hindlimb ischemia, blood flow recovery, capillary density, and local production of angiogenic factors in the ischemic limb treated with CKD MSCs were significantly inferior to those promoted by control MSCs. However, modifying CKD MSCs by overexpression of HIF-1α restored all of these changes. Taken together, these data suggest that p-cresol contributes to insulin resistance in a selective manner for Akt pathway. This might be a biological explanation for the functional incompetence of MSCs under uremia through defects in the insulin-induced elevation of HIF-1α protein expression.
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Affiliation(s)
- Hyunjin Noh
- Department of Internal Medicine, Soon Chun Hyang University, Seoul, Korea; Hyonam Kidney Laboratory, Soon Chun Hyang University, Seoul, Korea
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Balachandran V, Murugan M, Nataraj A, Karnan M, Ilango G. Comparative vibrational spectroscopic studies, HOMO-LUMO, NBO analyses and thermodynamic functions of p-cresol and 2-methyl-p-cresol based on DFT calculations. Spectrochim Acta A Mol Biomol Spectrosc 2014; 132:538-549. [PMID: 24892532 DOI: 10.1016/j.saa.2014.04.194] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 04/23/2014] [Accepted: 04/30/2014] [Indexed: 06/03/2023]
Abstract
In the present study structural properties of p-cresol, and 2-methoxy-p-cresol have been studied by using B3LYP/cc-pvdz and B3PW91/cc-pvdz of Density Functional Theory (DFT) utilizing Becke three exchange functional and Lee Yang Paar correlation functional. The Fourier transform infrared and Fourier transform Raman spectra of title molecules were recorded (solid phase). Optimized geometry, harmonic vibrational frequencies and various thermodynamic parameters of the title compounds were calculated with B3LYP/cc-pvdz, and B3PW91/cc-pvdz basis sets. Non-linear optical (NLO) behavior of the p-cresol and 2-methoxy-p-cresol were investigated by determining of electric dipole moment, polarizability α, and hyperpolarizability β using the above mentioned basis sets. The molecular properties such as ionization potential, electronegativity, chemical potential, electrophilicity have been deduced from HOMO-LUMO analysis employing the same basis sets. A detailed interpretation of the infrared and Raman spectra of title molecules were reported. UV spectrum was measured in different solvent. The energy and oscillator strength are calculated by Time Dependant Density Functional Theory (TD-DFT) results. The calculated HOMO and LUMO energies also confirm that charge transfer occurs within the molecule. The complete assignments were performed on the basis of the potential energy distribution (PED) of vibrational modes, calculated with scaled quantum mechanics (SQM) method. Finally the theoretical FT-IR, FT-Raman, and UV spectra of the title molecules have also been constructed.
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Affiliation(s)
- V Balachandran
- Department of Physics, Arignar Anna Government Arts College, Musiri, Tiruchirappalli 621211, India.
| | - M Murugan
- Department of Physics, Govt. Arts College, Tiruchirappalli 620022, India
| | - A Nataraj
- Department of Physics, SRM University, Ramapuram, Chennai 600089, India
| | - M Karnan
- Department of Physics, Srimad Andavan Arts and Science College, Tiruchirappalli 620005, India
| | - G Ilango
- Department of Physics, M.I.E.T. Engineering College, Tiruchirappalli 620007, India
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Gupta VK, Nayak A, Agarwal S, Tyagi I. Potential of activated carbon from waste rubber tire for the adsorption of phenolics: effect of pre-treatment conditions. J Colloid Interface Sci 2014; 417:420-30. [PMID: 24407705 DOI: 10.1016/j.jcis.2013.11.067] [Citation(s) in RCA: 377] [Impact Index Per Article: 37.7] [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: 09/05/2013] [Revised: 11/22/2013] [Accepted: 11/24/2013] [Indexed: 11/17/2022]
Abstract
Rubber tire activated carbon modification (RTACMC) and rubber tire activated carbon (RTAC) were prepared from waste rubber tire by microwave assisted chemical treatment and physical heating respectively. A greater improvement in porosity and total pore volume was achieved in RTACMC as compared to that of RTAC. But both have a predominantly mesoporous structure. Under identical operating conditions, an irradiation time of 10 min, chemical impregnation ratio of 1.50 and a microwave power of 600 W resulted in maximizing the efficiency of RTACMC for p-cresol (250 mg/g) at a contact time of 90 min while RTAC showed a 71.43 mg/g adsorption capacity at 150 min. Phenol, due to its higher solubility was adsorbed to a lesser extent by both adsorbents. Physical nature of interactions, pore diffusion mechanism and exothermicity of the adsorption process was operative in both adsorbents. The outcomes support the feasibility of preparing high quality activated carbon from waste rubber tire by microwave assisted chemical activation.
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Affiliation(s)
- Vinod Kumar Gupta
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India.
| | - Arunima Nayak
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Shilpi Agarwal
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
| | - Inderjeet Tyagi
- Department of Chemistry, Indian Institute of Technology Roorkee, Roorkee 247667, India
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Idziak M, Pędzisz P, Burdzińska A, Gala K, Pączek L. Uremic toxins impair human bone marrow-derived mesenchymal stem cells functionality in vitro. ACTA ACUST UNITED AC 2014; 66:187-94. [PMID: 24548687 DOI: 10.1016/j.etp.2014.01.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 01/15/2014] [Accepted: 01/21/2014] [Indexed: 02/07/2023]
Abstract
Mesenchymal stem cells (MSCs) are becoming therapeutic agents of interest in many areas of medicine, including renal diseases and kidney transplantations. However, the effect of uremia on cell properties is still unclear. Therefore, we examined the in vitro influence of uremic toxins, p-cresol (PC) and indoxyl sulfate (IS), on human bone marrow-derived MSC functionality. Cultured MSCs were treated with PC and IS at concentrations corresponding to subsequent stages of chronic kidney disease. Cell viability was characterized by metabolic activity (MTT assay) and proliferation rate (BrdU assay). Apoptosis (Annexin V test) and cell membrane damage (LDH assay) were also tested. MSC secretory properties were determined by measuring cytokine/growth factor levels in media from toxin-treated cells (ELISA). Uremic concentrations of PC and IS resulted in significant inhibition of MSC metabolic activity and proliferation. Toxins did not induce apoptosis, but damaged cell membranes. MSC paracrine activity was also altered - a decrease of VEGF and TGF-β1 levels and an increase in IGF-1 and IL-8 secretion was detected. Presented data indicate a negative influence of uremic toxins on functional characteristics of human bone marrow-derived MSCs. Therefore, their use as autologous therapeutic agents for kidney disease may be questionable and requires further investigations. The observed phenomenon may be attributable to many other MSC therapies, because of the high prevalence of chronic kidney disease in adult population.
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Affiliation(s)
- Marta Idziak
- Department of Immunology, Transplantology and Internal Diseases, Transplantation Institute, Warsaw Medical University, Poland.
| | - Piotr Pędzisz
- Department of Orthopaedy and Traumatology of the Motor System, Warsaw Medical University, Poland
| | - Anna Burdzińska
- Department of Immunology, Transplantology and Internal Diseases, Transplantation Institute, Warsaw Medical University, Poland
| | - Kamila Gala
- Department of Immunology, Transplantology and Internal Diseases, Transplantation Institute, Warsaw Medical University, Poland
| | - Leszek Pączek
- Department of Immunology, Transplantology and Internal Diseases, Transplantation Institute, Warsaw Medical University, Poland
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Tanaka S, Yano S, Sheikh AM, Nagai A, Sugimoto T. Effects of uremic toxin p-cresol on proliferation, apoptosis, differentiation, and glucose uptake in 3T3-L1 cells. Artif Organs 2014; 38:566-71. [PMID: 24417700 DOI: 10.1111/aor.12252] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Malnutrition is a common feature seen in chronic dialysis patients, and the survival rate of obese patients receiving such treatment is higher than that of lean patients. Irrespective of obesity or diabetes, dialysis patients commonly have insulin resistance, and the leading cause of death is cardiovascular (CV) disease. It has been reported that the concentration of p-cresol, a uremic toxin, is highly associated with CV events. As uremic toxin levels are high in dialysis patients, they may be involved in the pathogenesis of insulin resistance and CV disease in this population. However, little is known so far. Thus, we focused on this uremic toxin to examine its effects on adipocytes and their precursors. 3T3-L1 cells, a mouse preadipocyte cell line, were cultured until 90% confluency. The cells were then differentiated with 500 μM 3-isobutyl-methylxanthine, 250 nM dexamethasone, and 10 μg/mL insulin. Cell proliferation was evaluated by cell counting and bromodeoxyuridine (Brd-U) incorporation assay. Glucose uptake was estimated using radiolabeled 2-deoxyglucose. The range of concentrations of p-cresol used in the experiments was from 2 to 200 μM. The investigation of cell proliferation by cell counting revealed that, compared with control, 3T3-L1 cells treated with 100 and 200 μM p-cresol were significantly decreased in number at day 3 and day 7 of culture. The Brd-U incorporation assay also demonstrated similar inhibitory effects on cell proliferation, suggesting that p-cresol affected the normal cell cycle. Oil Red O staining at day 7 showed that the number of mature adipocytes was decreased by treatment with 200 μM p-cresol. Consistent with that finding, the number of apoptotic cells at day 7 was increased by treatment with 100 and 200 μM p-cresol. Peroxisome proliferator-activated receptor γ (PPARγ) mRNA expression increased time-dependently during the differentiation process of 3T3-L1 cells. p-Cresol dose-dependently decreased differentiation-induced mRNA expression of PPARγ. Uptake of 3H-labeled 2-deoxyglucose was markedly decreased by 200 μM p-cresol in the presence or in the absence of insulin, mainly because of the decreased number of mature adipocytes. High concentrations of p-cresol disturbed the cell cycle, induced apoptosis, inhibited the differentiation of preadipocytes into mature adipocytes, and decreased glucose uptake at baseline and after insulin stimulation. These findings indicate that accumulated p-cresol may induce reduction in adipose tissue, insulin resistance, and malnutrition, eventually leading to poor outcomes in chronic dialysis patients.
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Affiliation(s)
- Sayuri Tanaka
- Department of Internal Medicine, Shimane University Faculty of Medicine, Izumo, Japan
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Shiba T, Kawakami K, Sasaki T, Makino I, Kato I, Kobayashi T, Uchida K, Kaneko K. Effects of intestinal bacteria-derived p-cresyl sulfate on Th1-type immune response in vivo and in vitro. Toxicol Appl Pharmacol 2013; 274:191-9. [PMID: 24161588 DOI: 10.1016/j.taap.2013.10.016] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [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: 07/20/2013] [Revised: 09/23/2013] [Accepted: 10/14/2013] [Indexed: 10/26/2022]
Abstract
Protein fermentation by intestinal bacteria generates various compounds that are not synthesized by their hosts. An example is p-cresol, which is produced from tyrosine. Patients with chronic kidney disease (CKD) accumulate high concentrations of intestinal bacteria-derived p-cresyl sulfate (pCS), which is the major metabolite of p-cresol, in their blood, and this accumulation contributes to certain CKD-associated disorders. Immune dysfunction is a CKD-associated disorder that frequently contributes to infectious diseases among CKD patients. Although some studies imply pCS as an etiological factor, the relation between pCS and immune systems is poorly understood. In the present study, we investigated the immunological effects of pCS derived from intestinal bacteria in mice. For this purpose, we fed mice a tyrosine-rich diet that causes the accumulation of pCS in their blood. The mice were shown to exhibit decreased Th1-driven 2, 4-dinitrofluorobenzene-induced contact hypersensitivity response. The concentration of pCS in blood was negatively correlated with the degree of the contact hypersensitivity response. In contrast, the T cell-dependent antibody response was not influenced by the accumulated pCS. We also examined the in vitro cytokine responses by T cells in the presence of pCS. The production of IFN-γ was suppressed by pCS. Further, pCS decreased the percentage of IFN-γ-producing Th1 cells. Our results suggest that intestinal bacteria-derived pCS suppressesTh1-type cellular immune responses.
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Affiliation(s)
- Takahiro Shiba
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan.
| | - Koji Kawakami
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Takashi Sasaki
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Ikuyo Makino
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Ikuo Kato
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Toshihide Kobayashi
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Kazumi Uchida
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan
| | - Kimiyuki Kaneko
- Safety Research Department, Yakult Central Institute for Microbiological Research, 1796 Yaho, Kunitachi-Shi, Tokyo 186-8650, Japan
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