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Ma B, Zhao X, Zhang X, Yang B, Cai Z, Xing Z, Xu M, Mi L, Zhang J, Wang L, Zhao Y, Liu X. The acute neurotoxicity of inorganic mercury in Mactra chinensis philippi. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 270:106896. [PMID: 38490093 DOI: 10.1016/j.aquatox.2024.106896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Revised: 02/05/2024] [Accepted: 03/11/2024] [Indexed: 03/17/2024]
Abstract
Inorganic mercury (IHg) is hazardous to marine organisms especially resulting in neurotoxicity, bivalves are sensitive to pollutants as "ocean sentinel", but data on the neurotoxicity of IHg in bivalves are sparse. So we chosed M. chinensis philippi with typical neural structures in bivalves to investigate the neurotoxicity of IHg, which could be helpful to understand the specificity of neural regulation and the response characteristics of bivalves. After acute exposed to IHg (HgCl2) for 24 h, the metabolites of ganglion tissues in M. chinensis philippi were evaluated using 1H-nuclear magnetic resonance based metabolomics; Ca2+, neurotransmitters (nitric oxide, glutamate, acetylcholine) and related enzymes (calcineurin, nitric oxide synthase and acetylcholinesterase) were measured using biochemical detection. Compared to the control group, the levels of the nitric oxide (81.04 ± 12.84 μmol/g prot) and acetylcholine (30.93 ± 12.57 μg/mg prot) in M. chinensis philippi of IHg-treated were decreased, while glutamate (2.11 ± 0.61 mmol/L) increased significantly; the activity of nitric oxide synthase (679.34 ± 135.33 U/mg prot) was increased, while acetylcholinesterase (1.39 ± 0.44 U/mg prot) decreased significantly, and the activity of calcineurin (0.52 ± 0.02 U/mg prot) had a statistically insignificant increasing tendency. The concentration of Ca2+ (0.92 ± 0.46 mmol/g prot) in the IHg-treated group was significantly higher than that in the control group. OPLS-DA was performed to reveal the difference in metabolites between the control and IHg-challenged groups, the metabolites of glucose, glutamine, inosine, succinate, glutamate, homarine, and alanine were sensitive to IHg, subsequently metabolic pathways that were affected including glucose metabolism, glutamine metabolism, nucleotide metabolism, Krebs cycle, amino acid metabolism and osmotic regulation. In our study, IHg interfered with metabolites in M. chinensis philippi, thus the corresponding metabolic pathways were changed, which influenced the neurotransmitters subsequently. Furthermore, Ca2+overload affected the synthesis or degradation of the neurotransmitters, and then the altered neurotransmitters involved in changes in metabolic pathways again. Overall, we hypothesized that the neurotoxic effects of IHg on bivalve were in close contact with metabolism, neurotransmitters, related enzymes and Ca2+, which could be effective neurotoxic biomarkers for marine environmental quality assessment, and also provide effective data for the study of the regulatory mechanism of the nervous system in response to IHg in bivalves.
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Affiliation(s)
- Bangguo Ma
- School of Life Sciences, Ludong University, Yantai 264025, PR China
| | - Xiaoli Zhao
- Center for Reproductive Medicine, Yantai Yuhuangding Hospital, Yantai 264000, PR China
| | - Xiaoning Zhang
- The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Qingdao 266003, PR China
| | - Bowen Yang
- Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Zimin Cai
- School of Life Sciences, Ludong University, Yantai 264025, PR China
| | - Zihan Xing
- School of Life Sciences, Ludong University, Yantai 264025, PR China
| | - Mingzhe Xu
- School of Life Sciences, Ludong University, Yantai 264025, PR China
| | - Liuya Mi
- School of Life Sciences, Ludong University, Yantai 264025, PR China
| | | | - Lei Wang
- School of Life Sciences, Ludong University, Yantai 264025, PR China
| | - Yancui Zhao
- School of Life Sciences, Ludong University, Yantai 264025, PR China
| | - Xiaoli Liu
- School of Life Sciences, Ludong University, Yantai 264025, PR China.
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Tang Y, Zou Y, Cui J, Ma X, Zhang L, Yu S, Qiu L. Analysis of two intestinal bacterial metabolites (trimethylamine N-oxide and phenylacetylglutamine) in human serum samples of patients with T2DM and AMI using a liquid chromatography tandem mass spectrometry method. Clin Chim Acta 2022; 536:162-168. [DOI: 10.1016/j.cca.2022.09.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/29/2022] [Accepted: 09/16/2022] [Indexed: 11/03/2022]
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3
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Fu BC, Hullar MAJ, Randolph TW, Franke AA, Monroe KR, Cheng I, Wilkens LR, Shepherd JA, Madeleine MM, Le Marchand L, Lim U, Lampe JW. Associations of plasma trimethylamine N-oxide, choline, carnitine, and betaine with inflammatory and cardiometabolic risk biomarkers and the fecal microbiome in the Multiethnic Cohort Adiposity Phenotype Study. Am J Clin Nutr 2020; 111:1226-1234. [PMID: 32055828 PMCID: PMC7266689 DOI: 10.1093/ajcn/nqaa015] [Citation(s) in RCA: 84] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 01/22/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Trimethylamine N-oxide (TMAO), a compound derived from diet and metabolism by the gut microbiome, has been associated with several chronic diseases, although the mechanisms of action are not well understood and few human studies have investigated microbes involved in its production. OBJECTIVES Our study aims were 1) to investigate associations of TMAO and its precursors (choline, carnitine, and betaine) with inflammatory and cardiometabolic risk biomarkers; and 2) to identify fecal microbiome profiles associated with TMAO. METHODS We conducted a cross-sectional analysis using data collected from 1653 participants (826 men and 827 women, aged 60-77 y) in the Multiethnic Cohort Study. Plasma concentrations of TMAO and its precursors were measured by LC-tandem MS. We also analyzed fasting blood for markers of inflammation, glucose and insulin, cholesterol, and triglycerides (TGs), and further measured blood pressure. Fecal microbiome composition was evaluated by sequencing the 16S ribosomal RNA gene V1-V3 region. Associations of TMAO and its precursors with disease risk biomarkers were assessed by multivariable linear regression, whereas associations between TMAO and the fecal microbiome were assessed by permutational multivariate ANOVA and hurdle regression models using the negative binomial distribution. RESULTS Median (IQR) concentration of plasma TMAO was 3.05 μmol/L (2.10-4.60 μmol/L). Higher concentrations of TMAO and carnitine, and lower concentrations of betaine, were associated with greater insulin resistance (all P < 0.02). Choline was associated with higher systolic blood pressure, TGs, lipopolysaccharide-binding protein, and lower HDL cholesterol (P ranging from <0.001 to 0.03), reflecting an adverse cardiometabolic risk profile. TMAO was associated with abundance of 13 genera (false discovery rate < 0.05), including Prevotella, Mitsuokella, Fusobacterium, Desulfovibrio, and bacteria belonging to the families Ruminococcaceae and Lachnospiraceae, as well as the methanogen Methanobrevibacter smithii. CONCLUSIONS Plasma TMAO concentrations were associated with a number of trimethylamine-producing bacterial taxa, and, along with its precursors, may contribute to inflammatory and cardiometabolic risk pathways.
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Affiliation(s)
- Benjamin C Fu
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA,Department of Epidemiology, University of Washington, Seattle, WA, USA,Department of Epidemiology, Harvard TH Chan School of Public Health, Boston, MA, USA
| | - Meredith A J Hullar
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Timothy W Randolph
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Adrian A Franke
- Epidemiology Program, University of Hawaii Cancer Center, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Kristine R Monroe
- Department of Preventive Medicine, University of Southern California, Los Angeles, CA, USA
| | - Iona Cheng
- Department of Epidemiology and Biostatistics, University of California, San Francisco, CA, USA
| | - Lynne R Wilkens
- Epidemiology Program, University of Hawaii Cancer Center, University of Hawaii at Manoa, Honolulu, HI, USA
| | - John A Shepherd
- Epidemiology Program, University of Hawaii Cancer Center, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Margaret M Madeleine
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - Loïc Le Marchand
- Epidemiology Program, University of Hawaii Cancer Center, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Unhee Lim
- Epidemiology Program, University of Hawaii Cancer Center, University of Hawaii at Manoa, Honolulu, HI, USA
| | - Johanna W Lampe
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA,Department of Epidemiology, University of Washington, Seattle, WA, USA,Address correspondence to JWL (e-mail: )
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4
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Applying mass spectrometry-based assays to explore gut microbial metabolism and associations with disease. ACTA ACUST UNITED AC 2020; 58:719-732. [DOI: 10.1515/cclm-2019-0974] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/06/2019] [Indexed: 12/14/2022]
Abstract
AbstractThe workings of the gut microbiome have gained increasing interest in recent years through the mounting evidence that the microbiota plays an influential role in human health and disease. A principal focus of this research seeks to further understand the production of metabolic by-products produced by bacteria resident in the gut, and the subsequent interaction of these metabolites on host physiology and pathophysiology of disease. Gut bacterial metabolites of interest are predominately formed via metabolic breakdown of dietary compounds including choline and ʟ-carnitine (trimethylamine N-oxide), amino acids (phenol- and indole-containing uremic toxins) and non-digestible dietary fibers (short-chain fatty acids). Investigations have been accelerated through the application of mass spectrometry (MS)-based assays to quantitatively assess the concentration of these metabolites in laboratory- and animal-based experiments, as well as for direct circulating measurements in clinical research populations. This review seeks to explore the impact of these metabolites on disease, as well as to introduce the application of MS for those less accustomed to its use as a clinical tool, highlighting pertinent research related to its use for measurements of gut bacteria-mediated metabolites to further understand their associations with disease.
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Querio G, Antoniotti S, Levi R, Gallo MP. Trimethylamine N-Oxide Does Not Impact Viability, ROS Production, and Mitochondrial Membrane Potential of Adult Rat Cardiomyocytes. Int J Mol Sci 2019; 20:ijms20123045. [PMID: 31234461 PMCID: PMC6627059 DOI: 10.3390/ijms20123045] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/06/2019] [Accepted: 06/19/2019] [Indexed: 01/10/2023] Open
Abstract
Trimethylamine N-oxide (TMAO) is an organic compound derived from dietary choline and L-carnitine. It behaves as an osmolyte, a protein stabilizer, and an electron acceptor, showing different biological functions in different animals. Recent works point out that, in humans, high circulating levels of TMAO are related to the progression of atherosclerosis and other cardiovascular diseases. However, studies on a direct role of TMAO in cardiomyocyte parameters are still limited. The purpose of this work is to study the effects of TMAO on isolated adult rat cardiomyocytes. TMAO in both 100 µM and 10 mM concentrations, from 1 to 24 h of treatment, does not affect cell viability, sarcomere length, intracellular ROS, and mitochondrial membrane potential. Furthermore, the simultaneous treatment with TMAO and known cardiac insults, such as H2O2 or doxorubicin, does not affect the treatment’s effect. In conclusion, TMAO cannot be considered a direct cause or an exacerbating risk factor of cardiac damage at the cellular level in acute conditions.
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Affiliation(s)
- Giulia Querio
- Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin, Italy.
| | - Susanna Antoniotti
- Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin, Italy.
| | - Renzo Levi
- Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin, Italy.
| | - Maria Pia Gallo
- Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin, Italy.
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Baek K, Lee N, Chung I. Association of arsenobetaine with beta-cell function assessed by homeostasis model assessment (HOMA) in nondiabetic Koreans: data from the fourth Korea National Health and Nutrition Examination Survey (KNHANES) 2008-2009. Ann Occup Environ Med 2017; 29:31. [PMID: 28702205 PMCID: PMC5504790 DOI: 10.1186/s40557-017-0181-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 06/15/2017] [Indexed: 01/29/2023] Open
Abstract
Background Arsenic is known as an endocrine disruptor that people are exposed to through various sources such as drinking water and indigestion of marine products. Although some epidemiological and animal studies have reported a correlation between arsenic exposure and diabetes development, there are limited studies regarding the toxic effects of organic arsenic including arsenobetaine on the human body. Here, we analyzed the association between urine arsenobetaine and the homeostasis model assessment of β-cell function (HOMA-β), which is an index for predicting diabetes development and reflecting the function of pancreatic β-cells. Methods In the fourth Korea National Health and Nutrition Examination Survey (KNHANES), health and nutrition surveys and screening tests were performed. Of the total survey population, people with confirmed values for urine total arsenic and arsenobetaine were included, and known diabetic patients were excluded. A total 369 participants were finally included in the study. We collected surveys on health, height, body weight, body mass index, blood mercury level, fasting glucose level, and serum insulin level and calculated HOMA index. Owing to sexual discrepancy, we performed sexually stratified analysis. Results Urine total arsenic and total arsenic minus arsenobetaine was not associated with HOMA-IR and HOMA-β in univariate analysis or in sexually stratified analysis. However, urine arsenobetaine showed a statistically significant relationship with HOMA-β in univariate analysis, and only male participants showed a significant correlation in sexually stratified analysis. In the analysis adjusted for age, BMI, smoking, alcohol drinking, physical activity and blood mercury, the HOMA-β value in the group below the 25th percentile of arsenobetaine was significantly higher than the group between 50 and 75th percentile, while no difference was shown for HOMA-IR. In sexually stratified analysis, The value of HOMA-β was significantly higher in male participants with below the 25th percentile urine arsenobetaine than the group between 25 and 50th and between 50 and 75th, while no difference was shown for HOMA-IR. However, female participants did not demonstrate a relationship between HOMA–IR, HOMA-β and urine arsenobetaine. Conclusion This study revealed the association between urine arsenobetaine and pancreatic β-cell function assessed by HOMA-β in the normal population (without diabetes), especially in males, despite adjusting for factors affecting pancreatic β-cell function and diabetes. Electronic supplementary material The online version of this article (doi:10.1186/s40557-017-0181-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kiook Baek
- Division of Occupational and Environmental Medicine, Keimyung University Dongsan Medical Center, Daegu, South Korea
| | - Namhoon Lee
- Division of Occupational and Environmental Medicine, Keimyung University Dongsan Medical Center, Daegu, South Korea
| | - Insung Chung
- Division of Occupational and Environmental Medicine, Keimyung University Dongsan Medical Center, Daegu, South Korea.,Department of Preventive Medicine, Keimyung University School of Medicine, Daegu, South Korea
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7
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Mi S, Zhao YY, Jacobs RL, Curtis JM. Simultaneous determination of trimethylamine and trimethylamineN-oxide in mouse plasma samples by hydrophilic interaction liquid chromatography coupled to tandem mass spectrometry. J Sep Sci 2016; 40:688-696. [DOI: 10.1002/jssc.201600926] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/15/2016] [Accepted: 11/19/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Si Mi
- Department of Agricultural; Food and Nutritional Science; University of Alberta; Edmonton AB Canada
| | - Yuan-Yuan Zhao
- Department of Agricultural; Food and Nutritional Science; University of Alberta; Edmonton AB Canada
| | - René L. Jacobs
- Department of Agricultural; Food and Nutritional Science; University of Alberta; Edmonton AB Canada
| | - Jonathan M. Curtis
- Department of Agricultural; Food and Nutritional Science; University of Alberta; Edmonton AB Canada
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8
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Teft WA, Morse BL, Leake BF, Wilson A, Mansell SE, Hegele RA, Ho RH, Kim RB. Identification and Characterization of Trimethylamine-N-oxide Uptake and Efflux Transporters. Mol Pharm 2016; 14:310-318. [PMID: 27977217 DOI: 10.1021/acs.molpharmaceut.6b00937] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Trimethylamine-N-oxide (TMAO) is a recently identified predictor of cardiovascular and chronic kidney disease. TMAO is primarily generated through gut-microbiome mediated conversion of dietary choline and carnitine to TMA, which is converted to TMAO by hepatic flavin monooxygenase 3 (FMO3) and subsequently undergoes renal elimination. We investigated the role of uptake and efflux drug transporters in TMAO disposition in vitro and in vivo. After screening a large array of uptake transporters, we show organic cation transporter 2 (OCT2) is the key transporter for TMAO cellular uptake. In Oct1/2 knockout mice, we observed increased plasma TMAO levels with reduced renal retention, suggesting the importance of Oct2 in facilitating the uptake of TMAO into renal tubular cells in vivo. Multiple transporters of the ATP-binding cassette (ABC) family, including ABCG2 (BCRP) and ABCB1 (MDR1), were capable of TMAO efflux. In human subjects, clinical, dietary, and pharmacogenetic covariates were evaluated for contribution to TMAO levels in a cohort of dyslipidemic patients (n = 405). Interestingly, genetic variation in ABCG2, but not other transporters, appeared to play a role in modulating TMAO exposure.
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Affiliation(s)
- Wendy A Teft
- Department of Medicine, Division of Clinical Pharmacology, London Health Sciences Centre-University Hospital, Western University , 339 Windermere Road, London, Ontario N6A 5A5, Canada
| | - Bridget L Morse
- Department of Medicine, Division of Clinical Pharmacology, London Health Sciences Centre-University Hospital, Western University , 339 Windermere Road, London, Ontario N6A 5A5, Canada
| | - Brenda F Leake
- Department of Pediatrics, Division of Hematology and Oncology, Vanderbilt University School of Medicine , 338 PRB, 2220 Pierce Avenue, Nashville, Tennessee 37232-6310, United States
| | - Aze Wilson
- Department of Medicine, Division of Clinical Pharmacology, London Health Sciences Centre-University Hospital, Western University , 339 Windermere Road, London, Ontario N6A 5A5, Canada.,Department of Medicine, Division of Gastroenterology, London Health Sciences Centre-University Hospital, Western University , 339 Windermere Road, London, Ontario N6A 5A5, Canada
| | - Sara E Mansell
- Department of Medicine, Division of Clinical Pharmacology, London Health Sciences Centre-University Hospital, Western University , 339 Windermere Road, London, Ontario N6A 5A5, Canada
| | - Robert A Hegele
- Department of Medicine and Robarts Research Institute, Schulich School of Medicine and Dentistry, Western University , London, Ontario N6A 5B7, Canada
| | - Richard H Ho
- Department of Pediatrics, Division of Hematology and Oncology, Vanderbilt University School of Medicine , 338 PRB, 2220 Pierce Avenue, Nashville, Tennessee 37232-6310, United States
| | - Richard B Kim
- Department of Medicine, Division of Clinical Pharmacology, London Health Sciences Centre-University Hospital, Western University , 339 Windermere Road, London, Ontario N6A 5A5, Canada.,Department of Oncology, London Health Sciences Centre-Victoria Hospital, 800 Commissioners Road East, PO Box 5010, Western University , London, Ontario N6A 5W9, Canada.,Department of Physiology and Pharmacology, Medical Sciences Building, Western University , London, Ontario N6A 5C1, Canada
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9
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Mohammadi A, Najar AG, Yaghoobi MM, Jahani Y, Vahabzadeh Z. Trimethylamine-N-Oxide Treatment Induces Changes in the ATP-Binding Cassette Transporter A1 and Scavenger Receptor A1 in Murine Macrophage J774A.1 cells. Inflammation 2016; 39:393-404. [PMID: 26412259 DOI: 10.1007/s10753-015-0261-7] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Recently, trimethylamine N-oxide was introduced as a risk factor for atherosclerosis in terms of helping foam cell formation and worsening atherosclerosis complications. The present study was performed to investigate whether/how trimethylamine N-oxide is involved in regulation of ATP-binding cassette transporter A1 and scavenger receptor A1 in macrophages at both mRNA and protein levels. METHODS Murine macrophage J774A.1 cells were treated with micromolar concentrations of trimethylamine N-oxide and 4-phenylbutyric acid, a chemical chaperon, for different time intervals. Tunicamycin was also used as a control for induction of endoplasmic reticulum stress. RESULTS Similar to tunicamycin, trimethylamine N-oxide increased scavenger receptor A1 in all treatment periods, whereas ATP-binding cassette transporter A1 was only reduced 24 h post-treatment with trimethylamine N-oxide at both mRNA and protein levels. In contrast, 4-phenylbutyric acid failed to induce such changes in either scavenger receptor A1 or ATP-binding cassette transporter A1. CONCLUSIONS The results of this study, in agreement with previous studies, confirm the mechanistic role of trimethylamine N-oxide in the upregulation of scavenger receptor A1, which potentially can promote its proatherogenic role. The results also showed downregulation of ATP-binding cassette transporter A1 in trimethylamine N-oxide treated macrophages which may indicate another possible proatherosclerotic mechanism for foam cell formation.
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Affiliation(s)
- Abbas Mohammadi
- Department of Clinical Biochemistry, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.,Endocrine and Metabolism Research Center, Institute of Basic and Clinical Physiology, Kerman University of Medical Sciences, Kerman, Iran
| | - Ahmad Gholamhoseynian Najar
- Department of Clinical Biochemistry, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Mohammad Mehdi Yaghoobi
- Research Department of Biotechnology, Institute of Sciences and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran
| | - Yunes Jahani
- Social Determinants of Health Research Center, Institute of Futures Studies in Health, Department of Biostatistics and Epidemiology, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran
| | - Zakaria Vahabzadeh
- Department of Clinical Biochemistry, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman, Iran.
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Popko J, Herrfurth C, Feussner K, Ischebeck T, Iven T, Haslam R, Hamilton M, Sayanova O, Napier J, Khozin-Goldberg I, Feussner I. Metabolome Analysis Reveals Betaine Lipids as Major Source for Triglyceride Formation, and the Accumulation of Sedoheptulose during Nitrogen-Starvation of Phaeodactylum tricornutum. PLoS One 2016; 11:e0164673. [PMID: 27736949 PMCID: PMC5063337 DOI: 10.1371/journal.pone.0164673] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 09/28/2016] [Indexed: 11/18/2022] Open
Abstract
Oleaginous microalgae are considered as a promising resource for the production of biofuels. Especially diatoms arouse interest as biofuel producers since they are most productive in carbon fixation and very flexible to environmental changes in the nature. Naturally, triacylglycerol (TAG) accumulation in algae only occurs under stress conditions like nitrogen-limitation. We focused on Phaeodactylum strain Pt4 (UTEX 646), because of its ability to grow in medium with low salinity and therefore being suited when saline water is less available or for wastewater cultivation strategies. Our data show an increase in neutral lipids during nitrogen-depletion and predominantly 16:0 and 16:1(n-7) accumulated in the TAG fraction. The molecular species composition of TAG suggests a remodeling primarily from the betaine lipid diacylglyceroltrimethylhomoserine (DGTS), but a contribution of the chloroplast galactolipid monogalactosyldiacylglycerol (MGDG) cannot be excluded. Interestingly, the acyl-CoA pool is rich in 20:5(n-3) and 22:6(n-3) in all analyzed conditions, but these fatty acids are almost excluded from TAG. Other metabolites most obviously depleted under nitrogen-starvation were amino acids, lyso-phospholipids and tricarboxylic acid (TCA) cycle intermediates, whereas sulfur-containing metabolites as dimethylsulfoniopropionate, dimethylsulfoniobutyrate and methylsulfate as well as short acyl chain carnitines, propanoyl-carnitine and butanoyl-carnitine increased upon nitrogen-starvation. Moreover, the Calvin cycle may be de-regulated since sedoheptulose accumulated after nitrogen-depletion. Together the data provide now the basis for new strategies to improve lipid production and storage in Phaeodactylum strain Pt4.
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Affiliation(s)
- Jennifer Popko
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
| | - Cornelia Herrfurth
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
| | - Kirstin Feussner
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
| | - Till Ischebeck
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
| | - Tim Iven
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
| | - Richard Haslam
- Rothamsted Research, Biological Chemistry, Harpenden, AL5 2JQ, United Kingdom
| | - Mary Hamilton
- Rothamsted Research, Biological Chemistry, Harpenden, AL5 2JQ, United Kingdom
| | - Olga Sayanova
- Rothamsted Research, Biological Chemistry, Harpenden, AL5 2JQ, United Kingdom
| | - Jonathan Napier
- Rothamsted Research, Biological Chemistry, Harpenden, AL5 2JQ, United Kingdom
| | - Inna Khozin-Goldberg
- Microalgal Biotechnology Laboratory, The French Associates Institute for Agriculture and Biotechnology of Drylands, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus 8499000, Midreshet Ben-Gurion, Israel
| | - Ivo Feussner
- Georg-August-University, Albrecht-von-Haller-Institute for Plant Sciences, Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
- Georg-August-University, Goettingen Center for Molecular Biosciences (GZMB), Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
- Georg-August-University, International Center for Advanced Studies of Energy Conversion (ICASEC), Department of Plant Biochemistry, Justus-von-Liebig-Weg 11, 37077, Göttingen, Germany
- * E-mail:
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11
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Quantification of glycine betaine, choline and trimethylamine N-oxide in seawater particulates: Minimisation of seawater associated ion suppression. Anal Chim Acta 2016; 938:114-22. [PMID: 27619093 DOI: 10.1016/j.aca.2016.07.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 07/11/2016] [Accepted: 07/17/2016] [Indexed: 11/22/2022]
Abstract
A liquid chromatography/mass spectrometry (LC/MS, electrospray ionisation) method has been developed for the quantification of nitrogenous osmolytes (N-osmolytes) in the particulate fraction of natural water samples. Full method validation demonstrates the validity of the method for measuring glycine betaine (GBT), choline and trimethylamine N-oxide (TMAO) in particulates from seawater. Limits of detection were calculated as 3.5, 1.2 and 5.9 pg injected onto column (equivalent to 1.5, 0.6 and 3.9 nmol per litre) for GBT, choline and TMAO respectively. Precision of the method was typically 3% for both GBT and choline and 6% for TMAO. Collection of the particulate fraction of natural samples was achieved via in-line filtration. Resulting chromatography and method sensitivity was assessed and compared for the use of both glass fibre and polycarbonate filters during sample collection. Ion suppression was shown to be a significant cause of reduced instrument response to N-osmolytes and was associated with the presence of seawater in the sample matrix.
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A multiplexed targeted assay for high-throughput quantitative analysis of serum methylamines by ultra performance liquid chromatography coupled to high resolution mass spectrometry. Arch Biochem Biophys 2016; 597:12-20. [PMID: 27036856 DOI: 10.1016/j.abb.2016.03.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 03/27/2016] [Accepted: 03/28/2016] [Indexed: 12/28/2022]
Abstract
Methylamines are biologically-active metabolites present in serum and urine samples, which play complex roles in metabolic diseases. Methylamines can be detected by proton nuclear magnetic resonance (NMR), but specific methods remain to be developed for their routine assay in human serum in clinical settings. Here we developed and validated a novel reliable "methylamine panel" method for simultaneous quantitative analysis of trimethylamine (TMA), its major detoxification metabolite trimethylamine-N-oxide (TMAO), and precursors choline, betaine and l-carnitine in human serum using Ultra Performance Liquid Chromatography (UPLC) coupled to High Resolution Mass Spectrometry (HRMS). Metabolite separation was carried out on a HILIC stationary phase. For all metabolites, the assay was linear in the range of 0.25-12.5 μmol/L and enabled to reach limit of detection of about 0.10 μmol/L. Relative standard deviations were below 16% for the three levels of concentrations. We demonstrated the strong reliability and robustness of the method, which was applied to serum samples from healthy individuals to establish the range of concentrations of the metabolites and their correlation relationships and detect gender differences. Our data provide original information for implementing in a clinical environment a MS-based diagnostic method with potential for targeted metabolic screening of patients at risk of cardiometabolic diseases.
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Kim RB, Morse BL, Djurdjev O, Tang M, Muirhead N, Barrett B, Holmes DT, Madore F, Clase CM, Rigatto C, Levin A. Advanced chronic kidney disease populations have elevated trimethylamine N-oxide levels associated with increased cardiovascular events. Kidney Int 2016; 89:1144-1152. [PMID: 27083288 DOI: 10.1016/j.kint.2016.01.014] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 01/04/2016] [Accepted: 01/07/2016] [Indexed: 11/24/2022]
Abstract
Cardiovascular disease is more common in patients with chronic kidney disease (CKD), and traditional risk factors do not adequately predict those at risk for cardiovascular (CV) events. Recent evidence suggests elevated trimethylamine N-oxide (TMAO), created by gut microflora from dietary L-carnitine and choline, is associated with CV events. We investigated the relationship of TMAO levels in patients with stages 3b and 4 CKD to ischemic CV events using the CanPREDDICT cohort, a Canada-wide observational study with prospective 3-year follow-up of adjudicated CV events. Baseline samples were obtained for 2529 CKD patients. TMAO, choline, and L-carnitine levels were measured using tandem mass spectrometry. Baseline median TMAO level was high for the whole cohort (20.41 μM; interquartile range [IQR]: 12.82-32.70 μM). TMAO was independently associated with CV events (hazard ratio 1.23; 95% confidence interval: 1.06-1.42 / 1 SD lnTMAO) after adjusting for all potential CV risk factors. Those in the highest TMAO quartile had significantly higher risk of CV events (adjusted hazard ratio 1.59; 95% confidence interval: 1.04-2.43; P = 0.0351) in the analysis of recurring ischemic events. Among those with stage 3b CKD (hazard ratio 1.45; 95% confidence interval: 1.12-1.87 / 1 SD lnTMAO), independent of kidney function, TMAO levels identified those at highest risk for events. Our results suggest that TMAO may represent a new potentially modifiable CV risk factor for CKD patients. Further studies are needed to determine sources of variability and if lowering of TMAO reduces CV risk in CKD.
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Affiliation(s)
- Richard B Kim
- Department of Medicine, Western University, London, Ontario, Canada.
| | - Bridget L Morse
- Department of Medicine, Western University, London, Ontario, Canada
| | - Ognjenka Djurdjev
- Division of Nephrology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mila Tang
- Division of Nephrology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Norman Muirhead
- Department of Medicine, Western University, London, Ontario, Canada
| | - Brendan Barrett
- Memorial University Newfoundland, St. John's, Newfoundland, Canada
| | - Daniel T Holmes
- Department of Laboratory Medicine, University of British Columbia, Vancouver, British Columbia, Canada
| | | | | | | | - Adeera Levin
- Division of Nephrology, University of British Columbia, Vancouver, British Columbia, Canada.
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Heaney LM, Jones DJL, Mbasu RJ, Ng LL, Suzuki T. High mass accuracy assay for trimethylamine N-oxide using stable-isotope dilution with liquid chromatography coupled to orthogonal acceleration time of flight mass spectrometry with multiple reaction monitoring. Anal Bioanal Chem 2015; 408:797-804. [DOI: 10.1007/s00216-015-9164-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/20/2015] [Accepted: 10/29/2015] [Indexed: 02/06/2023]
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15
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Simultaneous determination of glycine betaine and arsenobetaine in biological samples by HPLC/ICPMS/ESMS and the application to some marine and freshwater fish samples. Microchem J 2015. [DOI: 10.1016/j.microc.2015.04.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Hefni M, McEntyre C, Lever M, Slow S. Validation of HPLC-UV Methods for the Quantification of Betaine in Foods by Comparison with LC-MS. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0195-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Development and validation of a simple UHPLC–MS/MS method for the simultaneous determination of trimethylamine N-oxide, choline, and betaine in human plasma and urine. J Pharm Biomed Anal 2015; 109:128-35. [DOI: 10.1016/j.jpba.2015.02.040] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 02/16/2015] [Accepted: 02/20/2015] [Indexed: 11/23/2022]
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18
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Hefni M, McEntyre C, Lever M, Slow S. A Simple HPLC Method with Fluorescence Detection for Choline Quantification in Foods. FOOD ANAL METHOD 2015. [DOI: 10.1007/s12161-015-0131-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Wang X, Zhao P, Liu X, Chen J, Xu J, Chen H, Yan X. Quantitative profiling method for phytohormones and betaines in algae by liquid chromatography electrospray ionization tandem mass spectrometry. Biomed Chromatogr 2014; 28:275-80. [PMID: 24037856 DOI: 10.1002/bmc.3018] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 07/07/2013] [Accepted: 07/12/2013] [Indexed: 11/11/2022]
Abstract
A liquid chromatography-tandem mass spectrometry (LC-MS/MS) method was developed for the quantitative determination of phytohormones and betaines in algae. The results showed that phytohormones and betaines were separated with high efficiency on Hypersil Gold C18 and Cnwsil SCX columns. Mass spectrometric detection was performed using positive or negative electrospray ionization in selective reaction monitoring mode (SRM). Linearity of the method was good with correlation coefficients (r(2) > 0.9951 in the range of 0.005-5 mg/L. The limits of detection were from 0.004 to 0.86 µg/L and the limits of quantification were in the range from 0.01 to 2.8 µg/L for the investigated phytohormones and betaines. The obtained recoveries varied between 61.33 and 90.39%, and the relative standard deviations were <15%. Using the developed methods, seven types of phytohormones and two types of betaines in Laminaria japonica, and seven types of phytohormones and one type of betaine in Pyropia haitanensis, which were collected in Xiangshan, Zhejiang Province, China, were determined. Thus, LC-MS/MS was demonstrated to be a powerful tool for the comprehensive analysis of phytohormones and betaines in algae, owing to its large dynamic range and excellent sensitivity.
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Affiliation(s)
- Xiujuan Wang
- College of Life Science, Taizhou University, Taizhou, 317000, China
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Effect of TMAO and betaine on the energy landscape of photosystem I. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2014; 1837:849-56. [PMID: 24440559 DOI: 10.1016/j.bbabio.2014.01.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 11/30/2013] [Accepted: 01/07/2014] [Indexed: 10/25/2022]
Abstract
The accumulation of organic co-solvents in cells is a basic strategy for organisms from various species to increase stress tolerance in extreme environments. Widespread representatives of this class of co-solvents are trimethylamine-N-oxide (TMAO) and betaine; these small molecules are able to stabilize the native conformation of proteins and prevent their aggregation. Despite their importance, detailed experimental studies on the impact of these co-solvents on the energy landscape of proteins have not yet been carried out. We use single-molecule spectroscopy at cryogenic temperatures to examine the influence of these physiological relevant co-solvents on photosystem I (PSI) from Thermosynechococcus elongatus. In contrast to PSI ensemble spectra, which are almost unaffected by the addition of TMAO and betaine, statistical analysis of the fluorescence emission from individual PSI trimers yields insight into the interaction of the co-solvents with PSI. The results show an increased homogeneity upon addition of TMAO or betaine. The number of detectable zero-phonon lines (ZPLs) is reduced, indicating spectral diffusion processes with faster rates. In the framework of energy landscape model these findings indicate that co-solvents lead to reduced barrier heights between energy valleys, and thus efficient screening of protein conformations can take place.
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Zhao S, Kumar R, Sakai A, Vetting MW, Wood BM, Brown S, Bonanno JB, Hillerich BS, Seidel RD, Babbitt PC, Almo SC, Sweedler JV, Gerlt JA, Cronan JE, Jacobson MP. Discovery of new enzymes and metabolic pathways by using structure and genome context. Nature 2013; 502:698-702. [PMID: 24056934 PMCID: PMC3966649 DOI: 10.1038/nature12576] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 08/15/2013] [Indexed: 12/03/2022]
Abstract
Assigning valid functions to proteins identified in genome projects is challenging: overprediction and database annotation errors are the principal concerns. We and others are developing computation-guided strategies for functional discovery with 'metabolite docking' to experimentally derived or homology-based three-dimensional structures. Bacterial metabolic pathways often are encoded by 'genome neighbourhoods' (gene clusters and/or operons), which can provide important clues for functional assignment. We recently demonstrated the synergy of docking and pathway context by 'predicting' the intermediates in the glycolytic pathway in Escherichia coli. Metabolite docking to multiple binding proteins and enzymes in the same pathway increases the reliability of in silico predictions of substrate specificities because the pathway intermediates are structurally similar. Here we report that structure-guided approaches for predicting the substrate specificities of several enzymes encoded by a bacterial gene cluster allowed the correct prediction of the in vitro activity of a structurally characterized enzyme of unknown function (PDB 2PMQ), 2-epimerization of trans-4-hydroxy-L-proline betaine (tHyp-B) and cis-4-hydroxy-D-proline betaine (cHyp-B), and also the correct identification of the catabolic pathway in which Hyp-B 2-epimerase participates. The substrate-liganded pose predicted by virtual library screening (docking) was confirmed experimentally. The enzymatic activities in the predicted pathway were confirmed by in vitro assays and genetic analyses; the intermediates were identified by metabolomics; and repression of the genes encoding the pathway by high salt concentrations was established by transcriptomics, confirming the osmolyte role of tHyp-B. This study establishes the utility of structure-guided functional predictions to enable the discovery of new metabolic pathways.
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Affiliation(s)
- Suwen Zhao
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California, USA
| | - Ritesh Kumar
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Ayano Sakai
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Matthew W. Vetting
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York, USA
| | - B. McKay Wood
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Shoshana Brown
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California, USA
| | - Jeffery B. Bonanno
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Brandan S. Hillerich
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Ronald D. Seidel
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Patricia C. Babbitt
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California, USA
| | - Steven C. Almo
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Jonathan V. Sweedler
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - John A. Gerlt
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Biochemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - John E. Cronan
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York, USA
- Department of Microbiology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Matthew P. Jacobson
- Department of Pharmaceutical Chemistry, University of California, San Francisco, California, USA
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Attri P, Venkatesu P, Kaushik N, Choi EH. TMAO and sorbitol attenuate the deleterious action of atmospheric pressure non-thermal jet plasma on α-chymotrypsin. RSC Adv 2012. [DOI: 10.1039/c2ra20085f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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