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Sinha AK, Laursen MF, Brinck JE, Rybtke ML, Hjørne AP, Procházková N, Pedersen M, Roager HM, Licht TR. Dietary fibre directs microbial tryptophan metabolism via metabolic interactions in the gut microbiota. Nat Microbiol 2024; 9:1964-1978. [PMID: 38918470 PMCID: PMC11306097 DOI: 10.1038/s41564-024-01737-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 05/17/2024] [Indexed: 06/27/2024]
Abstract
Tryptophan is catabolized by gut microorganisms resulting in a wide range of metabolites implicated in both beneficial and adverse host effects. How gut microbial tryptophan metabolism is directed towards indole, associated with chronic kidney disease, or towards protective indolelactic acid (ILA) and indolepropionic acid (IPA) is unclear. Here we used in vitro culturing and animal experiments to assess gut microbial competition for tryptophan and the resulting metabolites in a controlled three-species defined community and in complex undefined human faecal communities. The generation of specific tryptophan-derived metabolites was not predominantly determined by the abundance of tryptophan-metabolizing bacteria, but rather by substrate-dependent regulation of specific metabolic pathways. Indole-producing Escherichia coli and ILA- and IPA-producing Clostridium sporogenes competed for tryptophan within the three-species community in vitro and in vivo. Importantly, fibre-degrading Bacteroides thetaiotaomicron affected this competition by cross-feeding monosaccharides to E. coli. This inhibited indole production through catabolite repression, thus making more tryptophan available to C. sporogenes, resulting in increased ILA and IPA production. The fibre-dependent reduction in indole was confirmed using human faecal cultures and faecal-microbiota-transplanted gnotobiotic mice. Our findings explain why consumption of fermentable fibres suppresses indole production but promotes the generation of other tryptophan metabolites associated with health benefits.
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Affiliation(s)
- Anurag K Sinha
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark.
| | - Martin F Laursen
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Julius E Brinck
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Morten L Rybtke
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Anna Pii Hjørne
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Nicola Procházková
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | - Mikael Pedersen
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Henrik M Roager
- Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | - Tine R Licht
- National Food Institute, Technical University of Denmark, Kongens Lyngby, Denmark.
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Pradhan N, Delozier S, Brar S, Perez JA, Rahman M, Dobre M. Dietary Fiber Intake and Clinical Outcomes in Chronic Kidney Disease: A Report From the Chronic Renal Insufficiency Cohort Study. J Ren Nutr 2024:S1051-2276(24)00167-5. [PMID: 39074599 DOI: 10.1053/j.jrn.2024.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 06/11/2024] [Accepted: 07/21/2024] [Indexed: 07/31/2024] Open
Abstract
OBJECTIVE Dietary interventions are the mainstay of chronic diseases prevention in general population, but the evidence to support such therapeutic approaches in patients with chronic kidney disease (CKD) is less robust. The objective of this study is to examine the association between dietary fiber intake and adverse cardiovascular and kidney outcomes and all-cause mortality in participants with CKD enrolled in the Chronic Renal Insufficiency Cohort study. DESIGN AND METHODS A total of 3791 Chronic Renal Insufficiency Cohort participants with self-reported dietary fiber intake were included in the analyses stratified by tertiles of dietary fiber at study baseline. Hazard ratios for occurrence of all-cause mortality, composite cardiovascular events and composite kidney events were calculated using Cox Proportional Hazards models adjusted for demographic, clinical, and laboratory characteristics, including levels of inflammatory markers, C-reactive protein and interleukin-6. RESULTS Mean daily dietary fiber intake was 15.2 g/day. During a median (standard deviation) follow up of 14.6 (4.4) years, 1074 deaths from any cause occurred. In multivariable adjusted models, participants in the middle and low dietary fiber tertiles had a 19% (hazard ratio [95% CI]), 1.19 [1.02, 1.39]) and 11% (1.11 [0.95, 1.31]) greater risk of death respectively, compared to those in the highest fiber intake tertile. No statistically significant associations were observed between dietary fiber intake and adverse cardiovascular and kidney outcomes. Higher dietary fiber intake was not significantly associated with lower levels of C-reactive protein and interleukin-6. CONCLUSION A lower intake of dietary fiber was not associated with all-cause mortality in participants with CKD after adjustments for kidney function and inflammatory biomarkers. There was no significant association between dietary fiber intake and adverse kidney and cardiovascular outcomes. Future randomized intervention trials are needed to identify whether a high dietary fiber intake translates into improved clinical outcomes in CKD.
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Affiliation(s)
- Nishigandha Pradhan
- Division of Nephrology and Hypertension, Case Western Reserve University, University Hospital Cleveland Medical Center, Cleveland, Ohio.
| | - Sarah Delozier
- Clinical Research Unit, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Sumeet Brar
- Department of Medicine, Stanford University, Palo Alto, California
| | - Jaime Abraham Perez
- Clinical Research Unit, University Hospitals Cleveland Medical Center, Cleveland, Ohio
| | - Mahboob Rahman
- Division of Nephrology and Hypertension, Case Western Reserve University, University Hospital Cleveland Medical Center, Cleveland, Ohio
| | - Mirela Dobre
- Division of Nephrology and Hypertension, Case Western Reserve University, University Hospital Cleveland Medical Center, Cleveland, Ohio
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Cladis DP, Burstad KM, Biruete A, Jannasch AH, Cooper BR, Hill Gallant KM. Dietary Phosphorus Levels Influence Protein-Derived Uremic Toxin Production in Nephrectomized Male Rats. Nutrients 2024; 16:1807. [PMID: 38931160 PMCID: PMC11207110 DOI: 10.3390/nu16121807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2024] [Revised: 06/05/2024] [Accepted: 06/06/2024] [Indexed: 06/28/2024] Open
Abstract
Gut microbiota-derived uremic toxins (UT) accumulate in patients with chronic kidney disease (CKD). Dietary phosphorus and protein restriction are common in CKD treatment, but the relationship between dietary phosphorus, a key nutrient for the gut microbiota, and protein-derived UT is poorly studied. Thus, we explored the relationship between dietary phosphorus and serum UT in CKD rats. For this exploratory study, we used serum samples from a larger study on the effects of dietary phosphorus on intestinal phosphorus absorption in nephrectomized (Nx, n = 22) or sham-operated (sham, n = 18) male Sprague Dawley rats. Rats were randomized to diet treatment groups of low or high phosphorus (0.1% or 1.2% w/w, respectively) for 1 week, with serum trimethylamine oxide (TMAO), indoxyl sulfate (IS), and p-cresol sulfate (pCS) analyzed by LC-MS. Nx rats had significantly higher levels of serum TMAO, IS, and pCS compared to sham rats (all p < 0.0001). IS showed a significant interaction between diet and CKD status, where serum IS was higher with the high-phosphorus diet in both Nx and sham rats, but to a greater extent in the Nx rats. Serum TMAO (p = 0.24) and pCS (p = 0.34) were not affected by dietary phosphorus levels. High dietary phosphorus intake for 1 week results in higher serum IS in both Nx and sham rats. The results of this exploratory study indicate that reducing dietary phosphorus intake in CKD may have beneficial effects on UT accumulation.
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Affiliation(s)
- Dennis P. Cladis
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA; (D.P.C.); (K.M.B.)
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907, USA;
- Department of Food Science and Technology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - Kendal M. Burstad
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA; (D.P.C.); (K.M.B.)
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907, USA;
| | - Annabel Biruete
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907, USA;
- Department of Nutrition and Dietetics, Indiana University-Purdue University Indianapolis, Indianapolis, IN 46202, USA
- Division of Nephrology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Amber H. Jannasch
- Bindley Bioscience Center, Purdue University, West Lafayette, IN 47906, USA; (A.H.J.); (B.R.C.)
| | - Bruce R. Cooper
- Bindley Bioscience Center, Purdue University, West Lafayette, IN 47906, USA; (A.H.J.); (B.R.C.)
| | - Kathleen M. Hill Gallant
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA; (D.P.C.); (K.M.B.)
- Department of Nutrition Science, Purdue University, West Lafayette, IN 47907, USA;
- Division of Nephrology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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Fan Y, Keerthisinghe TP, Nian M, Cao X, Chen X, Yang Q, Sampathkumar K, Loo JSC, Ng KW, Demokritou P, Fang M. Comparative secretome metabolic dysregulation by six engineered dietary nanoparticles (EDNs) on the simulated gut microbiota. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133003. [PMID: 38029586 DOI: 10.1016/j.jhazmat.2023.133003] [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: 08/25/2023] [Revised: 10/27/2023] [Accepted: 11/12/2023] [Indexed: 12/01/2023]
Abstract
The potential use of engineered dietary nanoparticles (EDNs) in diet has been increasing and poses a risk of exposure. The effect of EDNs on gut bacterial metabolism remains largely unknown. In this study, liquid chromatography-mass spectrometry (LC-MS) based metabolomics was used to reveal significantly altered metabolites and metabolic pathways in the secretome of simulated gut microbiome exposed to six different types of EDNs (Chitosan, cellulose nanocrystals (CNC), cellulose nanofibrils (CNF) and polylactic-co-glycolic acid (PLGA); two inorganic EDNs including TiO2 and SiO2) at two dietary doses. We demonstrated that all six EDNs can alter the composition in the secretome with distinct patterns. Chitosan, followed by PLGA and SiO2, has shown the highest potency in inducing the secretome change with major pathways in tryptophan and indole metabolism, bile acid metabolism, tyrosine and phenol metabolism. Metabolomic alterations with clear dose response were observed in most EDNs. Overall, phenylalanine has been shown as the most sensitive metabolites, followed by bile acids such as chenodeoxycholic acid and cholic acid. Those metabolites might be served as the representative metabolites for the EDNs-gut bacteria interaction. Collectively, our studies have demonstrated the sensitivity and feasibility of using metabolomic signatures to understand and predict EDNs-gut microbiome interaction.
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Affiliation(s)
- Yijun Fan
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Anhui Medical University, No 678 Furong Road, Hefei 230601, Anhui, China
| | | | - Min Nian
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Xiaoqiong Cao
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, T.H. Chan School of Public Health, Harvard University, 655 Huntington Ave, Boston, MA 02115, USA
| | - Xing Chen
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China
| | - Qin Yang
- Nanyang Environment and Water Research Institute, Nanyang Technological University, 637141, Singapore
| | - Kaarunya Sampathkumar
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Joachim Say Chye Loo
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Kee Woei Ng
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, Department of Environmental Health, T.H. Chan School of Public Health, Harvard University, 655 Huntington Ave, Boston, MA 02115, USA
| | - Mingliang Fang
- Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China; Institute of Eco-Chongming, Shanghai 202162, China.
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Radisavljevic N, Metcalfe-Roach A, Cirstea M, Tabusi MM, Bozorgmehr T, Bar-Yoseph H, Finlay BB. Microbiota-mediated effects of Parkinson's disease medications on Parkinsonian non-motor symptoms in male transgenic mice. mSphere 2024; 9:e0037923. [PMID: 38078745 PMCID: PMC10826342 DOI: 10.1128/msphere.00379-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Accepted: 10/24/2023] [Indexed: 01/31/2024] Open
Abstract
Parkinson's disease (PD) is characterized by motor symptoms and a loss of dopaminergic neurons, as well as a variety of non-motor symptoms, including constipation, depression, and anxiety. Recently, evidence has also accumulated for a link between gut microbiota and PD. Most PD patients are on dopamine replacement therapy, primarily a combination of L-DOPA and carbidopa; however, the effect of these medications on the microbiota and non-motor symptoms in PD is still unclear. In this study, we explored the effects of chronic oral treatment with L-DOPA plus carbidopa (LDCD) on the gut microbiota and non-motor symptoms in males of a transgenic mouse model of PD (dbl-PAC-Tg(SNCAA53T);Snca-/-). To further test whether the effects of these PD medications were mediated by the gut microbiota, oral antibiotic treatment (Abx; vancomycin and neomycin) was included both with and without concurrent LDCD treatment. Post-treatment, the gastrointestinal, motor, and behavioral phenotypes were profiled, and fecal, ileal, and jejunal samples were analyzed for gut microbiota composition by 16S sequencing. LDCD treatment was found to improve symptoms of constipation and depression in this model, concurrent with increases in Turicibacter abundance in the ileum. Abx treatment worsened the symptoms of constipation, possibly through decreased levels of short-chain fatty acids and disrupted gut barrier function. LDCD + Abx treatment showed an interaction effect on behavioral symptoms that was also associated with ileal Turicibacter levels. This study demonstrates that, in a mouse model, PD medications and antibiotics affect PD-related non-motor symptoms potentially via the gut microbiota.IMPORTANCEThe motor symptoms of Parkinson's disease (PD) are caused by a loss of dopamine-producing neurons and are commonly treated with dopamine replacement therapy (L-DOPA plus carbidopa). PD has also been associated with altered gut microbiota composition. However, the effects of these PD medications on PD-related non-motor symptoms and the gut microbiota have not been well characterized. This study uses a transgenic mouse model of PD to help resolve medication-induced microbiota alterations from those that are potentially disease relevant within a PD context, and explores how long-term treatment may interact with the gut microbiota to impact non-motor symptoms.
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Affiliation(s)
- Nina Radisavljevic
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Avril Metcalfe-Roach
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mihai Cirstea
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
| | - M. Mahebali Tabusi
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
| | - Tahereh Bozorgmehr
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
| | - Haggai Bar-Yoseph
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
| | - B. Brett Finlay
- Michael Smith Laboratories, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada
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Deng Y, Zhang L, Chen S, Xu D, Wu W, Shen T, Liu Z, Yang L, Wen A, Hou Y, Shao F. Exploring the clinical efficacy and mechanism of high-position colon dialysis combined with Traditional Chinese Medicine retention enema in real-world patients with stage 3-5 chronic kidney disease (non-dialysis) based on the theory of the Gut-Kidney axis. Front Pharmacol 2024; 14:1246852. [PMID: 38328574 PMCID: PMC10847354 DOI: 10.3389/fphar.2023.1246852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2023] [Accepted: 12/31/2023] [Indexed: 02/09/2024] Open
Abstract
Background: With societal and economic development, the annual incidence of chronic kidney disease (CKD) is increasing. Current treatments for CKD are limited, and once patients progress to the uraemic stage, it places a significant economic burden on families and society. Based on the "gut-kidney axis" theory and real-world research, this study aims to evaluate the clinical efficacy, safety, and potential mechanism of high-position colon dialysis combined with traditional Chinese medicine (TCM) retention enema in treating stage 3-5 chronic kidney disease (non-dialysis). Additionally, it seeks to identify new therapeutic targets and approaches for CKD treatment. Methods: The TCM decoction was analyzed using Ultra-Performance Liquid Chromatography-Quadrupole-Orbitrap-High Resolution Mass Spectrometry (UPLC-Q-Orbitrap-HRMS). Participants meeting the inclusion criteria were divided into a control group (n = 153) and a treatment group (n = 159) based on their preferences and physicians' recommendations. Both groups adhered to a high-quality low-protein, low-salt, low-phosphorus, and low-fat diet supplemented with essential amino acids, and were monitored for blood pressure, blood glucose, and blood lipids. The treatment group received high-position colon dialysis combined with TCM retention enemas (administered at least 12 times every other day). Results: Thirteen compounds were identified from the herbs by UPLC-Q-Orbitrap-HRMS. The CKD3-5 treatment group exhibited improvements in blood biochemistry and other laboratory indices, with significant enhancements in renal function-related indices for CKD4 and CKD5 stages (p < 0.05). Following treatment, indoxyl sulfate (IS), endotoxin, and D-lactic acid levels decreased to a certain extent in both groups, with a statistically significant difference observed within the treatment group (p < 0.05). The treatment group displayed a significant reduction in aerobic bacterial colonies, an increase in anaerobic bacterial colonies, a decrease in Escherichia coli colonies, and an increase in Bifidobacterium and Lactobacillus colonies (p < 0.05). No significant changes in colony numbers were observed in the control group. Conclusion: High-position colon dialysis combined with TCM retention enema may serve as an adjuvant treatment for CKD4-5 (non-dialysis), and its mechanism may be related to the reduction of uraemic toxins, improvement of intestinal mucosal barrier function, and regulation of intestinal microecology. Clinical Trial Registration: https://www.chictr.org.cn/, identifier ChiCTR2200062852.
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Affiliation(s)
- Yanli Deng
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Leixiao Zhang
- Division of Internal Medicine, Institute of Integrated Traditional Chinese and Western Medicine, West China Hospital, Sichuan University, Chengdu, China
| | - Si Chen
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Dongxian Xu
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Wei Wu
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Tao Shen
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Zhen Liu
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Lin Yang
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Aiwei Wen
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Yuhao Hou
- Department of Nephrology, Sichuan Second Hospital of Traditional Chinese Medicine, Chengdu, China
| | - Fanyun Shao
- Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Lee CL, Liu WJ, Tsai SF. Effects of AST-120 on mortality in patients with chronic kidney disease modeled by artificial intelligence or traditional statistical analysis. Sci Rep 2024; 14:738. [PMID: 38184721 PMCID: PMC10771424 DOI: 10.1038/s41598-024-51498-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 01/05/2024] [Indexed: 01/08/2024] Open
Abstract
Chronic kidney disease (CKD) imposes a substantial burden, and patient prognosis remains grim. The impact of AST-120 (AST-120) on the survival of CKD patients lacks a consensus. This study aims to investigate the effects of AST-120 usage on the survival of CKD patients and explore the utility of artificial intelligence models for decision-making. We conducted a retrospective analysis of CKD patients receiving care in the pre-end-stage renal disease (ESRD) program at Taichung Veterans General Hospital from 2000 to 2019. We employed Cox regression models to evaluate the relationship between AST-120 use and patient survival, both before and after propensity score matching. Subsequently, we employed Deep Neural Network (DNN) and Extreme Gradient Boosting (XGBoost) models to assess their performance in predicting AST-120's impact on patient survival. Among the 2584 patients in our cohort, 2199 did not use AST-120, while 385 patients received AST-120. AST-120 users exhibited significantly lower mortality rates compared to non-AST-120 users (13.51% vs. 37.88%, p < 0.0001) and a reduced prevalence of ESRD (44.16% vs. 53.17%, p = 0.0005). Propensity score matching at 1:1 and 1:2 revealed no significant differences, except for dialysis and all-cause mortality, where AST-120 users exhibited significantly lower all-cause mortality (p < 0.0001), with a hazard ratio (HR) of 0.395 (95% CI = 0.295-0.522). This difference remained statistically significant even after propensity matching. In terms of model performance, the XGBoost model demonstrated the highest accuracy (0.72), specificity (0.90), and positive predictive value (0.48), while the logistic regression model showed the highest sensitivity (0.63) and negative predictive value (0.84). The area under the curve (AUC) values for logistic regression, DNN, and XGBoost were 0.73, 0.73, and 0.69, respectively, indicating similar predictive capabilities for mortality. In this cohort of CKD patients, the use of AST-120 is significantly associated with reduced mortality. However, the performance of artificial intelligence models in predicting the impact of AST-120 is not superior to statistical analysis using the current architecture and algorithm.
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Grants
- TCVGH-1093605D, TCVGH-1097316C, TCVGH-1097327D, TCVGH-1103502C, TCVGH-1107305D, TCVGH-1117308C, TCVGH-1117305D, TCVGH-1113602C, TCVGH-1113602D and TCVGH-1103601D Taichung Veterans General Hospital
- TCVGH-1093605D, TCVGH-1097316C, TCVGH-1097327D, TCVGH-1103502C, TCVGH-1107305D, TCVGH-1117308C, TCVGH-1117305D, TCVGH-1113602C, TCVGH-1113602D and TCVGH-1103601D Taichung Veterans General Hospital
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Affiliation(s)
- Chia-Lin Lee
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
- Intelligent Data Mining Laboratory, Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
- Department of Public Health, College of Public Health, China Medical University, Taichung, Taiwan
- School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung, Taiwan
| | - Wei-Ju Liu
- Intelligent Data Mining Laboratory, Department of Medical Research, Taichung Veterans General Hospital, Taichung, Taiwan
| | - Shang-Feng Tsai
- School of Medicine, National Yang-Ming University, Taipei, Taiwan.
- Department of Post-Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung, Taiwan.
- Division of Nephrology, Taichung Veterans General Hospital, Taiwan, 160, Sec. 3, Taiwan Boulevard, Taichung, 407, Taiwan.
- Department of Life Science, Tunghai University, Taichung, Taiwan.
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Zou X, Xiong L, Guo Z, Li Y, Ning K, Liu X, Xie Y, Peng Y, Liu Y, Cai X, Zhao B, Zhou F, Yu C, Zheng X, Campbell SC, Zhang Z. Trimethylamine-N-oxide (TMAO) and predicted risk of cardiovascular events after partial nephrectomy. Asian J Surg 2024; 47:281-288. [PMID: 37673746 DOI: 10.1016/j.asjsur.2023.08.104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 08/21/2023] [Indexed: 09/08/2023] Open
Abstract
INTRODUCTION Emerging evidence suggests that uremic toxins, in particular trimethylamine-N-oxide(TMAO), indoxyl-sulfate(IS), and p-cresyl-sulfate(PCS), may associate with increased risk of cardiovascular events(CVe). However, whether uremic toxins increase after partial nephrectomy(PN) and their correlation with risk for CVe remains unknown. METHODS 100 patients managed with PN were retrospectively reviewed. TMAO/IS/PCS levels were examined by liquid chromatography-mass-spectrometry. Renal-parenchymal-volume-preservation(RPVP) was estimated from CT scans. Predicted risks for CVe were obtained using the Framingham score. Linear regression assessed association between uremic toxins, GFR and risk of CVe. Logistic regression evaluated factors associated with post-PN TMAO. RESULTS TMAO, IS and PCS increased from 1.7, 3.7 and 3.5 μmol/L before PN to 3.6, 5.4 and 7.4 μmol/L at latest follow-up, respectively, while GFR declined from 102 to 93 ml/min/1.73 m2 (all p<0.001). TMAO, IS and PCS levels all negatively correlated with GFR(all p<0.001). Predicted 10-year risk of CVe increased from 1.1% pre-PN to 1.7% post-PN(p<0.001), primarily due to increased age(p<0.001), blood pressure(p = 0.002) and total cholesterol(p = 0.003). TMAO(β = 0.038) and GFR (β = -0.02) were independent predictors for predicted 10-year CVe risk on multivariable-analysis. Increased TMAO was an early and sustained finding maintained through 5 years, unlike IS, PCS and eGFR. On multivariable analysis, increased pre-PN TMAO(OR = 2.79) and decreased RPVP(OR = 3.23) were identified as independent risk factors for higher post-PN TMAO, while ischemia type/duration failed to correlate. CONCLUSION Uremic toxin levels increased after PN correlating with reduced GFR. Higher TMAO independently associated with greater predicted 10-year CVe risk. Parenchymal mass preserved rather than ischemia time or type associated with increased TMAO.
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Affiliation(s)
- Xiangpeng Zou
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China
| | - Longbin Xiong
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China
| | - Zhixing Guo
- Department of Ultrasound, Sun Yat-sen University Cancer Center, Guangzhou, PR China
| | - Yuchen Li
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China
| | - Kang Ning
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China
| | - Xiaohua Liu
- Department of Clinical Laboratory, Sun Yat-sen University Cancer Center, Guangzhou, PR China
| | - Ye Xie
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, PR China
| | - Yulu Peng
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China
| | - Yixuan Liu
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, PR China
| | - Xinyang Cai
- Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, PR China
| | - Boxin Zhao
- Department of Pharmacy, Nanfang Hospital, Southern Medical University, Guangzhou, PR China
| | - Fangjian Zhou
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China
| | - Chunping Yu
- Guangdong Key Laboratory of Urology, Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Institute of Urology, Guangzhou, PR China.
| | - Xia Zheng
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China.
| | - Steven C Campbell
- Department of Urology, Glickman Urological and Kidney Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Zhiling Zhang
- Department of Urology, Sun Yat-sen University Cancer Center, Guangzhou, PR China; State Key Laboratory of Oncology in Southern China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, PR China.
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Lu C, Wu L, Tang MY, Liu YF, Liu L, Liu XY, Zhang C, Huang L. Indoxyl sulfate in atherosclerosis. Toxicol Lett 2023:S0378-4274(23)00215-1. [PMID: 37414304 DOI: 10.1016/j.toxlet.2023.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2022] [Revised: 06/19/2023] [Accepted: 07/03/2023] [Indexed: 07/08/2023]
Abstract
Atherosclerosis (AS), a chronic vascular inflammatory disease, has become a main focus of attention worldwide for its chronic progressing disease course and serious complications in the later period. Nevertheless, explanations for the exact molecular mechanisms of AS initiation and development remain to be an unsolved problem. The classic pathogenesis theories, such as lipid percolation and deposition, endothelium injury, inflammation and immune damage, provide the foundation for discovering the new key molecules or signaling mechanisms. Recently, indoxyl sulfate (IS), one of non-free uremia toxins, has been noticeable for its multiple atherogenic effects. IS exists at high concentration in plasma for its great albumin binding rate. Patients with uremia have markedly elevated serum levels of IS due both to the deterioration of renal function and to the high binding affinity of IS to albumin. Nowadays, elevated incidence of circulatory disease among patients with renal dysfunction indicates correlation of uremic toxins with cardiovascular damage. In this review, the atherogenic effects of IS and the underlying mechanisms are summarized with emphasis on several key pathological events associated with AS developments, such as vascular endothelium dysfunction, arterial medial lesions, vascular oxidative stress, excessive inflammatory responses, calcification, thrombosis and foam cell formation. Although recent studies have proved the great correlation between IS and AS, deciphering cellular and pathophysiological signaling by confirming key factors involved in IS-mediated atherosclerosis development may enable identification of novel therapeutic targets.
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Affiliation(s)
- Cong Lu
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China; Departments of Clinical Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China
| | - Li Wu
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China; Departments of Clinical Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China
| | - Mu-Yao Tang
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China; Departments of Clinical Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China
| | - Yi-Fan Liu
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China
| | - Lei Liu
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China; Departments of Clinical Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China
| | - Xi-Ya Liu
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China; Departments of Clinical Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China
| | - Chun Zhang
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China; Departments of Clinical Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China
| | - Liang Huang
- Research Laboratory of Translational Medicine, Hengyang Medical School, University of South China, Hengyang, Hunan 421001, People's Republic of China.
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Zhu N, Duan H, Feng Y, Xu W, Shen J, Wang K, Liu J. Magnesium lithospermate B ameliorates diabetic nephropathy by suppressing the uremic toxin formation mediated by gut microbiota. Eur J Pharmacol 2023:175812. [PMID: 37245856 DOI: 10.1016/j.ejphar.2023.175812] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 05/08/2023] [Accepted: 05/25/2023] [Indexed: 05/30/2023]
Abstract
Diabetic nephropathy (DN) is a major cause of renal failure and urgently necessitates new therapeutic strategies. Magnesium lithospermate B (MLB) showed a good protective effect on kidney injure by oral administration, despite its extremely low bioavailability. The current study aimed to investigate its gut microbiota-targeted mechanism to explain the paradoxical properties of pharmacodynamics and pharmacokinetics. Here we show that MLB alleviated DN by recovering the dysfunction of gut microbiota and their associated metabolites in colon content, such as short-chain fatty acids and amino acids. Moreover, MLB significantly decreased uremic toxin levels in plasma, especially the p-cresyl sulfate. We further discovered that MLB could affect the metabolism of p-cresyl sulfate by suppressing the formation of its intestinal precursors, i.e. the microbiota-mediated conversion from 4-hydroxyphenylacetate to p-cresol. In addition, the inhibition effects of MLB were confirmed. MLB and its metabolite danshensu exhibited inhibitory effects on p-cresol formation mediated by three strains belonging to the genus Clostridium, Bifidobacterium, and Fusobacterium, respectively. Meanwhile, MLB decreased the levels of p-cresyl sulfate in plasma and p-cresol in feces caused by rectal administration of tyrosine in mice. To summarize, the results indicated that MLB ameliorated DN through modulating gut microbiota-associated p-cresyl sulfate metabolism. Together, this study provides new insights on the microbiota-targeted mechanism of MLB in intervening DN and a new strategy in lowering plasma uremic toxins by blocking the formation of their precursors in intestine.
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Affiliation(s)
- Nanlin Zhu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Haonan Duan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Yingying Feng
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Wenwei Xu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Jianhua Shen
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China
| | - Kai Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China.
| | - Jia Liu
- Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, PR China; School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310058, PR China.
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11
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Ragi N, Pallerla P, Babi Reddy Gari AR, Lingampelly SS, Ketavarapu V, Addipilli R, Chirra N, Kantevari S, Yadla M, Sripadi P. Assessment of uremic toxins in advanced chronic kidney disease patients on maintenance hemodialysis by LC-ESI-MS/MS. Metabolomics 2023; 19:14. [PMID: 36826619 DOI: 10.1007/s11306-023-01978-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 01/23/2023] [Indexed: 02/25/2023]
Abstract
INTRODUCTION In the advanced stage of chronic kidney disease (CKD), electrolytes, fluids, and metabolic wastes including various uremic toxins, accumulate at high concentrations in the patients' blood. Hemodialysis (HD) is the conventional procedure used worldwide to remove metabolic wastes. The creatinine and urea levels have been routinely monitored to estimate kidney function and effectiveness of the HD process. This study, first from in Indian perspective, aimed at the identification and quantification of major uremic toxins in CKD patients on maintenance HD (PRE-HD), and compared with the healthy controls (HC) as well as after HD (POST-HD). OBJECTIVES The study mainly focused on the identification of major uremic toxins in Indian perspective and the quantitative analysis of indoxyl sulfate and p-cresol sulfate (routinely targeted uremic toxins), and phenyl sulfate, catechol sulfate, and guaiacol sulfate (targeted for the first time), apart from creatinine and urea in PRE-HD, POST-HD, and HC groups. METHODS Blood samples were collected from 90 HD patients (both PRE-HD and POST-HD), and 74 HCs. The plasma samples were subjected to direct ESI-HRMS and LC/HRMS for untargeted metabolomics and LC-MS/MS for quantitative analysis. RESULTS Various known uremic toxins, and a few new and unknown peaks were detected in PRE-HD patients. The p-cresol sulfate and indoxyl sulfate were dominant in PRE-HD, the concentrations of phenyl sulfate, catechol sulfate, and guaiacol sulfate were about 50% of that of indoxyl sulfate. Statistical evaluation on the levels of targeted uremic toxins in PRE-HD, POST-HD, and HC groups showed a significant difference among the three groups. The dialytic clearance of indoxyl sulfate and p-cresol sulfate was found to be < 35%, while that of the other three sulfates was 50-58%. CONCLUSION LC-MS/MS method was developed and validated to evaluate five major uremic toxins in CKD patients on HD. The levels of the targeted uremic toxins could be used to assess kidney function and the effectiveness of HD.
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Affiliation(s)
- Nagarjunachary Ragi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
- Centre for Mass Spectrometry, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India
| | - Pavankumar Pallerla
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
- Centre for Mass Spectrometry, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India
| | | | - Sai Sachin Lingampelly
- Centre for Mass Spectrometry, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India
| | | | - Ramunaidu Addipilli
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
- Centre for Mass Spectrometry, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India
| | - Nagaraju Chirra
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India
| | - Srinivas Kantevari
- Department of Fluoro & Agrochemicals, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India
| | - Manjusha Yadla
- Department of Nephrology, Gandhi Medical College, Gandhi Hospitals, Hyderabad, Telangana, 500025, India.
| | - Prabhakar Sripadi
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India.
- Centre for Mass Spectrometry, Department of Analytical & Structural Chemistry, CSIR-Indian Institute of Chemical Technology, Hyderabad, Telangana, 500007, India.
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Probiotic Bifidobacteria Mitigate the Deleterious Effects of para-Cresol in a Drosophila melanogaster Toxicity Model. mSphere 2022; 7:e0044622. [PMID: 36321825 PMCID: PMC9769938 DOI: 10.1128/msphere.00446-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Renal impairment associated with chronic kidney disease (CKD) causes the buildup of uremic toxins that are deleterious to patient health. Current therapies that manage toxin accumulation in CKD offer an incomplete therapeutic effect against toxins such as para-cresol (p-cresol) and p-cresyl sulfate. Probiotic therapies can exploit the wealth of microbial diversity to reduce toxin accumulation. Using in vitro culture techniques, strains of lactobacilli and bifidobacteria from a 24-strain synbiotic were investigated for their ability to remove p-cresol. Four strains of bifidobacteria internalized p-cresol from the extracellular environment. The oral supplementation of these toxin-clearing probiotics was more protective than control strains in a Drosophila melanogaster toxicity model. Bifidobacterial supplementation was also associated with higher abundance of lactobacilli in the gut microbiota of p-cresol-exposed flies. The present findings suggest that these strains might reduce p-cresol in the gut in addition to increasing the prevalence of other beneficial bacteria, such as lactobacilli, and should be tested clinically to normalize the dysbiotic gut microbiota observed in CKD patients. IMPORTANCE Chronic kidney disease (CKD) affects approximately 10% of the global population and has limited treatment options. The accumulation of gut microbiota-derived uremic toxins, such as para-cresol (p-cresol) and p-cresyl sulfate, is associated with the onset of comorbidities (i.e., atherosclerosis and cognitive disorders) in CKD. Unfortunately, dialysis, the gold standard therapy is unable to remove these toxins from the bloodstream due to their highly protein-bound nature. Some strains of Bifidobacterium have metabolic properties that may be useful in managing uremic toxicity. Using a Drosophila model, the present work highlights why dosing with certain probiotic strains may be clinically useful in CKD management.
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Sarfraz MH, Shahid A, Asghar S, Aslam B, Ashfaq UA, Raza H, Prieto MA, Simal-Gandara J, Barba FJ, Rajoka MSR, Khurshid M, Nashwan AJ. Personalized nutrition, microbiota, and metabolism: A triad for eudaimonia. Front Mol Biosci 2022; 9:1038830. [PMID: 36330221 PMCID: PMC9623024 DOI: 10.3389/fmolb.2022.1038830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 10/06/2022] [Indexed: 11/28/2022] Open
Abstract
During the previous few years, the relationship between the gut microbiota, metabolic disorders, and diet has come to light, especially due to the understanding of the mechanisms that particularly link the gut microbiota with obesity in animal models and clinical trials. Research has led to the understanding that the responses of individuals to dietary inputs vary remarkably therefore no single diet can be suggested to every individual. The variations are attributed to differences in the microbiome and host characteristics. In general, it is believed that the immanent nature of host-derived factors makes them difficult to modulate. However, diet can more easily shape the microbiome, potentially influencing human physiology through modulation of digestion, absorption, mucosal immune response, and the availability of bioactive compounds. Thus, diet could be useful to influence the physiology of the host, as well as to ameliorate various disorders. In the present study, we have described recent developments in understanding the disparities of gut microbiota populations between individuals and the primary role of diet-microbiota interactions in modulating human physiology. A deeper understanding of these relationships can be useful for proposing personalized nutrition strategies and nutrition-based therapeutic interventions to improve human health.
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Affiliation(s)
| | - Aqsa Shahid
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
- Faculty of Rehabilitation and Allied Health Sciences, Riphah International University, Faisalabad, Pakistan
| | - Samra Asghar
- Faculty of Rehabilitation and Allied Health Sciences, Riphah International University, Faisalabad, Pakistan
| | - Bilal Aslam
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Usman Ali Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University Faisalabad, Faisalabad, Pakistan
| | - Hammad Raza
- Department of Biochemistry, Government College University Faisalabad, Faisalabad, Pakistan
| | - Miguel A. Prieto
- Nutrition and Bromatology Group, Faculty of Food Science and Technology, University of Vigo, Ourense, Spain
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, Bragança, Portugal
| | - Jesus Simal-Gandara
- Nutrition and Bromatology Group, Faculty of Food Science and Technology, University of Vigo, Ourense, Spain
| | - Francisco J. Barba
- Nutrition and Bromatology Group, Faculty of Food Science and Technology, University of Vigo, Ourense, Spain
- Nutrition and Food Science Area, Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine Department, Faculty of Pharmacy, Universitat de València, Burjassot, València, Spain
| | - Muhammad Shahid Riaz Rajoka
- Nutrition and Bromatology Group, Faculty of Food Science and Technology, University of Vigo, Ourense, Spain
- Food and Feed Immunology Group, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Mohsin Khurshid
- Department of Microbiology, Government College University Faisalabad, Faisalabad, Pakistan
- *Correspondence: Mohsin Khurshid, ; Abdulqadir J. Nashwan,
| | - Abdulqadir J. Nashwan
- Nursing Department, Hazm Mebaireek General Hospital (HMGH), Hamad Medical Corporation (HMC), Doha, Qatar
- *Correspondence: Mohsin Khurshid, ; Abdulqadir J. Nashwan,
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Urinary Metabolomics Study on the Protective Role of Cocoa in Zucker Diabetic Rats via 1H-NMR-Based Approach. Nutrients 2022; 14:nu14194127. [PMID: 36235779 PMCID: PMC9572671 DOI: 10.3390/nu14194127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 09/29/2022] [Accepted: 09/30/2022] [Indexed: 11/19/2022] Open
Abstract
Cocoa constitutes one of the richest sources of dietary flavonoids with demonstrated anti-diabetic potential. However, the metabolic impact of cocoa intake in a diabetic context remains unexplored. In this study, metabolomics tools have been used to investigate the potential metabolic changes induced by cocoa in type 2 diabetes (T2D). To this end, male Zucker diabetic fatty rats were fed on standard (ZDF) or 10% cocoa-rich diet (ZDF-C) from week 10 to 20 of life. Cocoa supplementation clearly decreased serum glucose levels, improved glucose metabolism and produced significant changes in the urine metabolome of ZDF animals. Fourteen differential urinary metabolites were identified, with eight of them significantly modified by cocoa. An analysis of pathways revealed that butanoate metabolism and the synthesis and degradation of branched-chain amino acids and ketone bodies are involved in the beneficial impact of cocoa on diabetes. Moreover, correlation analysis indicated major associations between some of these urine metabolites (mainly valine, leucine, and isoleucine) and body weight, glycemia, insulin sensitivity, and glycated hemoglobin levels. Overall, this untargeted metabolomics approach provides a clear metabolic fingerprint associated to chronic cocoa intake that can be used as a marker for the improvement of glucose homeostasis in a diabetic context.
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15
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Cao Y, Aquino-Martinez R, Hutchison E, Allayee H, Lusis AJ, Rey FE. Role of gut microbe-derived metabolites in cardiometabolic diseases: Systems based approach. Mol Metab 2022; 64:101557. [PMID: 35870705 PMCID: PMC9399267 DOI: 10.1016/j.molmet.2022.101557] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 06/30/2022] [Accepted: 07/18/2022] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND The gut microbiome influences host physiology and cardiometabolic diseases by interacting directly with intestinal cells or by producing molecules that enter the host circulation. Given the large number of microbial species present in the gut and the numerous factors that influence gut bacterial composition, it has been challenging to understand the underlying biological mechanisms that modulate risk of cardiometabolic disease. SCOPE OF THE REVIEW Here we discuss a systems-based approach that involves simultaneously examining individuals in populations for gut microbiome composition, molecular traits using "omics" technologies, such as circulating metabolites quantified by mass spectrometry, and clinical traits. We summarize findings from landmark studies using this approach and discuss future applications. MAJOR CONCLUSIONS Population-based integrative approaches have identified a large number of microbe-derived or microbe-modified metabolites that are associated with cardiometabolic traits. The knowledge gained from these studies provide new opportunities for understanding the mechanisms involved in gut microbiome-host interactions and may have potentially important implications for developing novel therapeutic approaches.
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Affiliation(s)
- Yang Cao
- Departments of Medicine, Human Genetics, and Microbiology, Immunology, & Molecular Genetics, David Geffen School of Medicine of UCLA, Los Angeles, CA 90095, USA
| | - Ruben Aquino-Martinez
- Department of Bacteriology, University of Wisconsin, Madison, Madison, WI 53706, USA
| | - Evan Hutchison
- Department of Bacteriology, University of Wisconsin, Madison, Madison, WI 53706, USA
| | - Hooman Allayee
- Departments of Population & Public Health Sciences and Biochemistry & Molecular Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Aldons J Lusis
- Departments of Medicine, Human Genetics, and Microbiology, Immunology, & Molecular Genetics, David Geffen School of Medicine of UCLA, Los Angeles, CA 90095, USA.
| | - Federico E Rey
- Department of Bacteriology, University of Wisconsin, Madison, Madison, WI 53706, USA
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A Comprehensive 2D-LC/MS/MS Profile of the Normal Human Urinary Metabolome. Diagnostics (Basel) 2022; 12:diagnostics12092184. [PMID: 36140585 PMCID: PMC9497905 DOI: 10.3390/diagnostics12092184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/26/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Profiling bodily fluids is crucial for monitoring and discovering metabolic markers of disease. In this study, a comprehensive analysis approach based on 1D-LC-MS/MS and 2D-LC-MS/MS was applied to profile normal human urine metabolites from 348 children and 315 adults. A total of 2357 metabolites were identified, including 1831 endogenous metabolites and 526 exogenous ones. In total, 1005 metabolites were identified in urine for the first time. The urinary metabolites were mainly involved in amino acid metabolism, small molecule biochemistry, lipid metabolism and cellular compromise. The comparison of adult’s and children’s urine metabolomes showed adults urine had more metabolites involved in immune response than children’s, but the function of binding of melatonin, which belongs to the endocrine system, showed a higher expression in children. The urine metabolites detected by the 1D-LC-MS/MS method were mainly related to amino acid metabolism and lipid metabolism, and the 2D-LC-MS/MS method not only explored metabolites from 1D-LC-MS/MS but also metabolites related to cell signaling, cell function and maintenance, etc. Our analysis comprehensively profiled and functionally annotated the metabolome of normal human urine, which would benefit the application of urinary metabolome to clinical research.
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17
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Oto J, Fernández-Pardo Á, Roca M, Plana E, Cana F, Herranz R, Pérez-Ardavín J, Vera-Donoso CD, Martínez-Sarmiento M, Medina P. LC-MS metabolomics of urine reveals distinct profiles for non-muscle-invasive and muscle-invasive bladder cancer. World J Urol 2022; 40:2387-2398. [PMID: 36057894 DOI: 10.1007/s00345-022-04136-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 08/11/2022] [Indexed: 12/01/2022] Open
Abstract
PURPOSE Bladder cancer (BC) is among the most frequent malignancies worldwide. Novel non-invasive markers are needed to diagnose and stage BC with more accuracy than invasive procedures like cystoscopy. To date, no study has identified urine metabolites characteristic of all BC stages. To discover novel urine metabolomic profiles to diagnose and stage non-muscle-invasive (NMIBC) and muscle-invasive (MIBC) patients using mass spectrometry-based metabolomics. METHODS We prospectively recruited 198 BC patients and 98 age- and sex-matched healthy volunteers without evidence of renal or bladder condition confirmed by ultrasound, from whom we collected a first morning urine sample (before surgery in patients). In a discovery stage, an untargeted metabolomic analysis was conducted in urine samples of a selection of 64 BC patients (19 TaG1, 11 TaG3, 20 T1G3, 12 T2G3, 1 T2G2, 1 T3G3) and 20 controls to identify dysregulated metabolites. Next, after exhaustive multivariate analysis, confirmed dysregulated metabolites were validated in an independent cohort of 134 BC patients (19 TaG1, 62 TaG2, 9 TaG3, 15 T1G2, 16 T1G3, 4 T2G2, 9 T2G3) and 78 controls. RESULTS We validated p-cresol glucuronide as potential diagnostic biomarker for BC patients compared to controls (AUC = 0.79). For NMIBC, p-cresol glucuronide was valuable as staging biomarker (AUC = 0.803). And among NMIBCs, p-coumaric acid may be a potential specific staging biomarker for the TaG1 NMIBC; however, future validation experiments should be conducted once the precise version of the standard is commercially available. Remarkably, for MIBC we validated spermine as potential specific staging biomarker (AUC = 0.882). CONCLUSION Ours is the first metabolomics study conducted in urine of a thoroughly characterized cohort comprising all stages of NMIBC, MIBC and healthy controls in which we identified non-invasive diagnostic and staging biomarkers. These may improve BC management, thus reducing the use of current harmful diagnostic techniques.
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Affiliation(s)
- Julia Oto
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - Álvaro Fernández-Pardo
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - Marta Roca
- Analytical Unit Platform, Medical Research Institute Hospital La Fe, Valencia, Spain
| | - Emma Plana
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain.,Angiology and Vascular Surgery Service, La Fe University and Polytechnic Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - Fernando Cana
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - Raquel Herranz
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - Javier Pérez-Ardavín
- Urology Service, La Fe University and Polytechnic Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - César David Vera-Donoso
- Urology Service, La Fe University and Polytechnic Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - Manuel Martínez-Sarmiento
- Urology Service, La Fe University and Polytechnic Hospital, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain
| | - Pilar Medina
- Haemostasis, Thrombosis, Arteriosclerosis and Vascular Biology Research Group, Medical Research Institute Hospital La Fe, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain. .,IIS La Fe-Hospital Universitario y Politécnico La Fe, Torre A, 5ª Planta, Lab. 5-09, Av. Fernando Abril Martorell 106, 46026, Valencia, Spain.
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18
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Liu X, Deng R, Chen Y, Huang S, Lu J, Zheng L, Xiong G, Li S. Jian-Pi-Yi-Shen Formula Improves Adenine-Induced Chronic Kidney Disease via Regulating Tryptophan Metabolism and Aryl Hydrocarbon Receptor Signaling. Front Pharmacol 2022; 13:922707. [PMID: 35865941 PMCID: PMC9294467 DOI: 10.3389/fphar.2022.922707] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 06/15/2022] [Indexed: 11/13/2022] Open
Abstract
Traditional Chinese medicine (TCM) is an important complementary and alternative branch of chronic kidney disease (CKD) therapy. Jian-Pi-Yi-Shen formula (JPYSF) is a TCM formula used for treating CKD with good efficacy. However, the underlying mechanisms of JPYSF in treating CKD remain to be elucidated. The purpose of the present study was to investigate the renoprotective effect and potential mechanism of JPYSF in treating CKD. CKD rat model was induced by feeding a diet containing 0.75% w/w adenine for 4 weeks. JPYSF was given by gavage every day, starting from the 3rd week of the adenine-containing diet and continuing for 4 weeks at the dose of 10.89 g/kg. Renal injury was evaluated by serum creatinine (Scr), blood urea nitrogen (BUN), histopathology, and fibrotic markers expression. Serum levels of tryptophan metabolites were detected by ultra-high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS). Aryl hydrocarbon receptor (AHR) signaling was tested by Western blot analysis. The results found that JPYSF treatment significantly lowered Scr and BUN levels, improved renal pathological injury, and down-regulated fibrotic markers expression in CKD rats. Furthermore, JPYSF significantly reduced the levels of 10 tryptophan metabolites in the serum of CKD rats and restored the level of tryptophan. Additionally, the kidney expression of AHR signaling was enhanced in CKD rats and was further suppressed in JPYSF treated rats. These results suggested that JPYSF protected against adenine-induced CKD via modulating tryptophan metabolism and AHR activation.
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Affiliation(s)
- Xinhui Liu
- Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, Guangzhou University of Chinese Medicine, Shenzhen, China
- *Correspondence: Xinhui Liu, ; Guoliang Xiong, ; Shunmin Li,
| | - Ruyu Deng
- Shenzhen Traditional Chinese Medicine Hospital Affiliated to Nanjing University of Chinese Medicine, Shenzhen, China
| | - Yulian Chen
- The Fourth Clinical Medical College, Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Shiying Huang
- Shenzhen Key Laboratory of Hospital Chinese Medicine Preparation, Shenzhen Traditional Chinese Medicine Hospital, Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Jiandong Lu
- Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Lin Zheng
- Shenzhen Key Laboratory of Hospital Chinese Medicine Preparation, Shenzhen Traditional Chinese Medicine Hospital, Guangzhou University of Chinese Medicine, Shenzhen, China
| | - Guoliang Xiong
- Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, Guangzhou University of Chinese Medicine, Shenzhen, China
- *Correspondence: Xinhui Liu, ; Guoliang Xiong, ; Shunmin Li,
| | - Shunmin Li
- Department of Nephrology, Shenzhen Traditional Chinese Medicine Hospital, Guangzhou University of Chinese Medicine, Shenzhen, China
- *Correspondence: Xinhui Liu, ; Guoliang Xiong, ; Shunmin Li,
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19
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Beker BM, Colombo I, Gonzalez-Torres H, Musso CG. Decreasing microbiota-derived uremic toxins to improve CKD outcomes. Clin Kidney J 2022; 15:2214-2219. [PMID: 36381370 PMCID: PMC9664568 DOI: 10.1093/ckj/sfac154] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Chronic kidney disease (CKD) is set to become the fifth-leading global cause of death by 2040. This illustrates the many unknowns regarding its pathogenesis and therapy. A key unknown relates to the therapeutic impact of the interaction between CKD and the gut microbiome. The normal gut microbiome is essential for body homeostasis. There is evidence for multiple interactions between the microbiota and CKD—its causes, comorbidities and therapeutic interventions—that are only starting to be unraveled. Thus uremic retention products, such as urea itself, modify the gut microbiota biology and both dietary and drug prescriptions modify the composition and function of the microbiota. Conversely, the microbiota may influence the progression and manifestations of CKD through the production of biologically active compounds (e.g. short-chain fatty acids such as butyrate and crotonate) and precursors of uremic toxins. The present review addresses these issues and their relevance for novel therapeutic approaches ranging from dietary interventions to prebiotics, probiotics, synbiotics and postbiotics, to the prevention of the absorption of microbial metabolites and to increased clearance of uremic toxins of bacterial origin through optimized dialysis techniques or blockade of tubular cell transporters.
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Affiliation(s)
- Braian M Beker
- Human Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires , Buenos Aires , Argentina
| | - Iara Colombo
- Human Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires , Buenos Aires , Argentina
| | - Henry Gonzalez-Torres
- Facultad de Ciencias de la Salud. Universidad Simón Bolívar , Barranquilla , Colombia
- Doctorado en Ciencias Biomédicas. Universidad del Valle, Cali , Valle del Cauca , Colombia
| | - Carlos G Musso
- Human Physiology Department, Instituto Universitario del Hospital Italiano de Buenos Aires , Buenos Aires , Argentina
- Facultad de Ciencias de la Salud. Universidad Simón Bolívar , Barranquilla , Colombia
- Research Department, Hospital Italiano de Buenos Aires , Buenos Aires , Argentina
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20
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Torimoto K, Ueda T, Kasahara M, Hirayama A, Matsushita C, Matsumoto Y, Gotoh D, Nakai Y, Miyake M, Aoki K, Fujimoto K. Identification of diagnostic serum biomarkers for Hunner-type interstitial cystitis. Low Urin Tract Symptoms 2022; 14:334-340. [PMID: 35307976 DOI: 10.1111/luts.12439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/01/2022] [Accepted: 03/07/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Diagnosis of Hunner-type interstitial cystitis (HIC) relies on the ability to identify Hunner lesions endoscopically, which can lead to storage symptom misdiagnosis. Here, we examined serum biomarkers for HIC and verified their utility. METHODS Based on the previous definition of the Japanese guidelines, which did not distinguish HIC and non-HIC diseases, we searched for serum biomarkers in 25 patients with interstitial cystitis (IC) and 25 control participants using metabolomics during 2013-2014. In 2019, we conducted a validation study in HIC and control groups. Serum samples were analyzed using liquid chromatography-tandem mass spectrometry, and candidate biomarker concentrations were compared between the groups using Mann-Whitney test. RESULTS Metabolomics targeted 678 metabolites and revealed that the levels of 14 lysolipids, seven γ-glutamyl amino acids, and two monoacylglycerols were significantly different between the IC and control groups. The following metabolites were selected from each metabolite category as candidates: 1-linoleoylglycerophosphocholine (1-linoleloyl-GPC [18:2]), γ-glutamylisoleucine (γ-Glu-Ile), and 1-arachidonylglycerol (1-AG). The serum concentrations of 1-linoleoyl-GPC (18:2) in the HIC and control groups were 27 920 ± 6261 and 40 360 ± 1514 ng/mL (P = 0.0003), respectively. The serum concentrations of γ-Glu-Ile and 1-AG were not significantly different between the groups. When the cut-off value of 1-linoleoyl-GPC (18:2) was set at 28 400 ng/mL, the sensitivity and specificity were 68% and 84%, respectively. CONCLUSIONS Serum 1-linoleoyl-GPC (18:2) is a candidate diagnostic biomarker for HIC. Additional studies on whether this biomarker can distinguish HIC from other diseases with high urination frequency are required for its clinical use.
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Affiliation(s)
| | | | - Masato Kasahara
- Institute for Clinical and Translational Science, Nara Medical University, Kashihara, Japan
| | - Akihide Hirayama
- Department of Urology, Kindai University Nara Hospital, Ikoma, Japan
| | - Chie Matsushita
- Department of Urology, Saiseikai Chuwa Hospital, Sakurai, Japan
| | | | - Daisuke Gotoh
- Department of Urology, Nara Medical University, Kashihara, Japan
| | - Yasushi Nakai
- Department of Urology, Nara Medical University, Kashihara, Japan
| | - Makito Miyake
- Department of Urology, Nara Medical University, Kashihara, Japan
| | - Katsuya Aoki
- Department of Urology, Nara Medical University, Kashihara, Japan
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21
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Zhao S, Khoo S, Ng SC, Chi A. Brain Functional Network and Amino Acid Metabolism Association in Females with Subclinical Depression. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19063321. [PMID: 35329007 PMCID: PMC8951207 DOI: 10.3390/ijerph19063321] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 02/05/2023]
Abstract
This study aimed to investigate the association between complex brain functional networks and the metabolites in urine in subclinical depression. Electroencephalography (EEG) signals were recorded from 78 female college students, including 40 with subclinical depression (ScD) and 38 healthy controls (HC). The phase delay index was utilized to construct functional connectivity networks and quantify the topological properties of brain networks using graph theory. Meanwhile, the urine of all participants was collected for non-targeted LC-MS metabolic analysis to screen differential metabolites. The global efficiency was significantly increased in the α-2, β-1, and β-2 bands, while the characteristic path length of β-1 and β-2 and the clustering coefficient of β-2 were decreased in the ScD group. The severity of depression was negatively correlated with the level of cortisone (p = 0.016, r = −0.40). The metabolic pathways, including phenylalanine metabolism, phenylalanine tyrosine tryptophan biosynthesis, and nitrogen metabolism, were disturbed in the ScD group. The three metabolic pathways were negatively correlated (p = 0.014, r = −0.493) with the global efficiency of the brain network of the β-2 band, whereas they were positively correlated (p = 0.014, r = 0.493) with the characteristic path length of the β-2 band. They were mainly associated with low levels of L-phenylalanine, and the highest correlation sparsity was 0.11. The disturbance of phenylalanine metabolism and the phenylalanine, tryptophan, tyrosine biosynthesis pathways cause depressive symptoms and changes in functional brain networks. The decrease in the L-phenylalanine level may be related to the randomization trend of the β-1 frequency brain functional network.
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Affiliation(s)
- Shanguang Zhao
- Centre for Sport and Exercise Sciences, University Malaya, Kuala Lumpur 50603, Malaysia;
| | - Selina Khoo
- Centre for Sport and Exercise Sciences, University Malaya, Kuala Lumpur 50603, Malaysia;
- Correspondence: (S.K.); (A.C.)
| | - Siew-Cheok Ng
- Department of Biomedical Engineering, Faculty of Engineering, University Malaya, Kuala Lumpur 50603, Malaysia;
| | - Aiping Chi
- Institute of Physical Education, Shaanxi Normal University, Xi’an 710119, China
- Correspondence: (S.K.); (A.C.)
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22
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Tryptophan Metabolites Regulate Neuropentraxin 1 Expression in Endothelial Cells. Int J Mol Sci 2022; 23:ijms23042369. [PMID: 35216489 PMCID: PMC8874566 DOI: 10.3390/ijms23042369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 02/11/2022] [Accepted: 02/16/2022] [Indexed: 11/18/2022] Open
Abstract
In patients with chronic kidney disease (CKD) and in animal models of CKD, the transcription factor Aryl Hydrocabon Receptor (AhR) is overactivated. In addition to the canonical AhR targets constituting the AhR signature, numerous other genes are regulated by this factor. We identified neuronal pentraxin 1 (NPTX1) as a new AhR target. Belonging to the inflammatory protein family, NPTX1 seems of prime interest regarding the inflammatory state observed in CKD. Endothelial cells were exposed to tryptophan-derived toxins, indoxyl sulfate (IS) and indole-3-acetic acid (IAA). The adenine mouse model of CKD was used to analyze NPTX1 expression in the burden of uremia. NPTX1 expression was quantified by RT-PCR and western blot. AhR involvement was analyzed using silencing RNA. We found that IS and IAA upregulated NPTX1 expression in an AhR-dependent way. Furthermore, this effect was not restricted to uremic indolic toxins since the dioxin 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) and the tryptophan photoproduct 6-formylindolo[3,2-b]carbazole (FICZ) do the same. In CKD mice, NPTX1 expression was increased in the aorta. Therefore, NPTX1 is a new target of AhR and further work is necessary to elucidate its exact role during CKD.
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23
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Uremic Toxins and Protein-Bound Therapeutics in AKI and CKD: Up-to-Date Evidence. Toxins (Basel) 2021; 14:toxins14010008. [PMID: 35050985 PMCID: PMC8780792 DOI: 10.3390/toxins14010008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/17/2021] [Accepted: 12/18/2021] [Indexed: 12/28/2022] Open
Abstract
Uremic toxins are defined as harmful metabolites that accumulate in the human body of patients whose renal function declines, especially chronic kidney disease (CKD) patients. Growing evidence demonstrates the deteriorating effect of uremic toxins on CKD progression and CKD-related complications, and removing uremic toxins in CKD has become the conventional treatment in the clinic. However, studies rarely pay attention to uremic toxin clearance in the early stage of acute kidney injury (AKI) to prevent progression to CKD despite increasing reports demonstrating that uremic toxins are correlated with the severity of injury or mortality. This review highlights the current evidence of uremic toxin accumulation in AKI and the therapeutic value to prevent CKD progression specific to protein-bound uremic toxins (PBUTs).
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24
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Zhang P, Fang J, Li G, Zhang L, Lai X, Xu L, Liu L, Xiong Y, Li L, Zhang T, Wan J, Xu H, Chen R, Zhang W, Ma J, Chen Z. Sex Differences in Fecal Microbiota Correlation With Physiological and Biochemical Indices Associated With End-Stage Renal Disease Caused by Immunoglobulin a Nephropathy or Diabetes. Front Microbiol 2021; 12:752393. [PMID: 34899638 PMCID: PMC8661007 DOI: 10.3389/fmicb.2021.752393] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 10/29/2021] [Indexed: 12/29/2022] Open
Abstract
This study investigated the sex-specific differences in the correlation between intestinal microbiota and end-stage renal disease. Here, we compared the differences in the gut microbiota of male and female healthy controls (HC) and patients with end-stage renal disease (ESRD) caused by immunoglobulin A (IgA) nephropathy (ESRD-IgAN) or type-2 diabetes mellitus (ESRD-T2DM) using high-throughput sequencing of the 16S rRNA gene. We also analyzed the correlation between gut microbiota and clinical immune indicators. We assigned 8, 10, 5, 7, 11, and 20 volunteers to female HC, ESRD-IgAN, and ESRD-T2DM, and male HC, ESRD-IgAN, and ESRD-T2DM, respectively. The results showed sex-specific differences in both physiological and biochemical indices and intestinal microbiota composition, as well as the correlation between them. The correlations between physiological and biochemical indices in men were significantly lower than those in women, especially for indices related to immunity, blood glucose, and cardiac color sonography. Urine output, lymphocyte ratio, serum albumin, blood calcium, dialysis status, serum urea nitrogen, urine protein, and diabetes significantly correlated with male fecal microbiota composition, whereas only creatinine and 2-h post-prandial blood glucose significantly correlated with female fecal microbiota composition. The top 50 dominant operational taxonomic units showed a stronger correlation with physiological and biochemical indices in samples obtained from females than from males. These differences highlight sex-specific differences in the effectiveness of ESRD prevention and treatments via regulating intestinal microbiota.
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Affiliation(s)
- Peng Zhang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiali Fang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Guanghui Li
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Lei Zhang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xingqiang Lai
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Lu Xu
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Luhao Liu
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yunyi Xiong
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Li Li
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Tao Zhang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Jiao Wan
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Hailin Xu
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Rongxin Chen
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Weiting Zhang
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Junjie Ma
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zheng Chen
- Organ Transplant Center, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
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25
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Ho PN, Klanrit P, Hanboonsong Y, Yordpratum U, Suksawat M, Kulthawatsiri T, Jirahiranpat A, Deewai S, Mackawan P, Sermswan RW, Namwat N, Loilome W, Khampitak T, Wangwiwatsin A, Phetcharaburanin J. Bacterial challenge-associated metabolic phenotypes in Hermetia illucens defining nutritional and functional benefits. Sci Rep 2021; 11:23316. [PMID: 34857836 PMCID: PMC8639782 DOI: 10.1038/s41598-021-02752-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Accepted: 11/18/2021] [Indexed: 01/18/2023] Open
Abstract
Black soldier fly (BSF, Hermetia illucens) is popular for its applications in animal feed, waste management and antimicrobial peptide source. The major advantages of BSF larva include their robust immune system and high nutritional content that can be further developed into more potential agricultural and medical applications. Several strategies are now being developed to exploit their fullest capabilities and one of these is the immunity modulation using bacterial challenges. The mechanism underlying metabolic responses of BSF to different bacteria has, however, remained unclear. In the current study, entometabolomics was employed to investigate the metabolic phenoconversion in response to either Escherichia coli, Staphylococcus aureus, or combined challenges in BSF larva. We have, thus far, characterised 37 metabolites in BSF larva challenged with different bacteria with the major biochemical groups consisting of amino acids, organic acids, and sugars. The distinct defense mechanism-specific metabolic phenotypes were clearly observed. The combined challenge contributed to the most significant metabolic phenoconversion in BSF larva with the dominant metabolic phenotypes induced by S. aureus. Our study suggested that the accumulation of energy-related metabolites provided by amino acid catabolism is the principal metabolic pathway regulating the defense mechanism. Therefore, combined challenge is strongly recommended for raising BSF immunity as it remarkably triggered amino acid metabolisms including arginine and proline metabolism and alanine, aspartate and glutamate metabolism along with purine metabolism and pyruvate metabolism that potentially result in the production of various nutritional and functional metabolites.
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Affiliation(s)
- Phuc N Ho
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Poramate Klanrit
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Khon Kaen University International Phenome Laboratory, Khon Kaen, 40002, Thailand.,Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Yupa Hanboonsong
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Umaporn Yordpratum
- Department of Microbiology, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Manida Suksawat
- Khon Kaen University International Phenome Laboratory, Khon Kaen, 40002, Thailand.,Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Thanaporn Kulthawatsiri
- Khon Kaen University International Phenome Laboratory, Khon Kaen, 40002, Thailand.,Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Anyarin Jirahiranpat
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Suthicha Deewai
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Panya Mackawan
- Department of Entomology and Plant Pathology, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.,Research and Development Center, Betagro Group, Klong Luang, Pathum Thani, 12120, Thailand
| | - Rasana W Sermswan
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Nisana Namwat
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Khon Kaen University International Phenome Laboratory, Khon Kaen, 40002, Thailand.,Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Watcharin Loilome
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Khon Kaen University International Phenome Laboratory, Khon Kaen, 40002, Thailand.,Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Tueanjit Khampitak
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Arporn Wangwiwatsin
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand.,Khon Kaen University International Phenome Laboratory, Khon Kaen, 40002, Thailand.,Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Jutarop Phetcharaburanin
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University, Khon Kaen, 40002, Thailand. .,Khon Kaen University International Phenome Laboratory, Khon Kaen, 40002, Thailand. .,Cholangiocarcinoma Research Institute, Khon Kaen University, Khon Kaen, 40002, Thailand. .,Center of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand.
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26
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Li Y, Cao H, Wang X, Guo L, Ding X, Zhao W, Zhang F. Diet-mediated metaorganismal relay biotransformation: health effects and pathways. Crit Rev Food Sci Nutr 2021:1-19. [PMID: 34802351 DOI: 10.1080/10408398.2021.2004993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In recent years, the concept of metaorganism expands our insight into how diet-microbe-host interactions contribute to human health and diseases. We realized that many biological metabolic processes in the host can be summarized into metaorganismal relay pathways, in which metabolites such as trimethylamine-N‑oxide, short-chain fatty acids and bile acids act as double-edged swords (beneficial or harmful effects) in the initiation and progression of diseases. Pleiotropic effects of metabolites are derived from several influencing factors including dose level, targeted organ of effect, action duration and species of these metabolites. Based on the pleiotropic effects of metabolites, personalized therapeutic approaches including microecological agents, enzymatic regulators and changes in dietary habits to govern related metabolite production may provide a new insight in promoting human health. In this review, we summarize our current knowledge of metaorganismal relay pathways and elaborate on the pleiotropic effects of metabolites in these pathways, with special emphasis on related therapeutic nutritional interventions.
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Affiliation(s)
- Yanmin Li
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Hong Cao
- Department of Nutrition, Affiliated Hospital of Jiangnan University, Wuxi, China
| | - Xiaoqian Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Lichun Guo
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Xiaoying Ding
- Department of Endocrinology and Metabolism, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wei Zhao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Feng Zhang
- Department of Nutrition, Affiliated Hospital of Jiangnan University, Wuxi, China
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27
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Melekoglu E, Samur FG. Dietary strategies for gut-derived protein-bound uremic toxins and cardio-metabolic risk factors in chronic kidney disease: A focus on dietary fibers. Crit Rev Food Sci Nutr 2021:1-15. [PMID: 34704501 DOI: 10.1080/10408398.2021.1996331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Chronic kidney disease (CKD) is associated with altered composition and function of gut microbiota. The cause of gut dysbiosis in CKD is multifactorial and encompasses the following: uremic state, metabolic acidosis, slow colonic transit, dietary restrictions of plant-based fiber-rich foods, and pharmacological therapies. Dietary restriction of potassium-rich fruits and vegetables, which are common sources of fermentable dietary fibers, inhibits the conversion of dietary fibers to short-chain fatty acids (SCFA), which are the primary nutrient source for the symbiotic gut microbiota. Reduced consumption of fermentable dietary fibers limits the population of SCFA-forming bacteria and causes dysbiosis of gut microbiota. Gut dysbiosis induces colonic fermentation of protein and formation of gut-derived uremic toxins. In this review, we discuss the roles and benefits of dietary fiber on gut-derived protein-bound uremic toxins and plant-based dietary patterns that could be recommended to decrease uremic toxin formation in CKD patients. Recent studies have indicated that dietary fiber supplementation may be useful to decrease gut-derived uremic toxin formation and slow CKD progression. However, research on associations between adherence of healthy dietary patterns and gut-derived uremic toxins formation in patients with CKD is lacking.
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Affiliation(s)
- Ebru Melekoglu
- Faculty of Health Sciences, Nutrition and Dietetics Department, Hacettepe University, Ankara, Turkey.,Faculty of Health Sciences, Nutrition and Dietetics Department, Cukurova University, Adana, Turkey
| | - F Gulhan Samur
- Faculty of Health Sciences, Nutrition and Dietetics Department, Hacettepe University, Ankara, Turkey
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28
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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] [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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Rong Y, Kiang TKL. Characterizations of Human UDP-Glucuronosyltransferase Enzymes in the Conjugation of p-Cresol. Toxicol Sci 2021; 176:285-296. [PMID: 32421801 DOI: 10.1093/toxsci/kfaa072] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
p-Cresol is a uremic toxin that is formed by intestinal microbiota and extensively conjugated by first-pass metabolism. p-Cresol glucuronide exerts various forms of cellular toxicity in vitro and is accumulated in the plasma of subjects with kidney disease, where associations with adverse cardiovascular and renal outcomes are evident. The objective of this study was to determine the contributions of human UDP-glucuronosyltransferase (UGT) enzymes in the formation of p-cresol glucuronide. Utilizing commonly expressed hepatic or renal human recombinant UGTs (ie, hrUGT1A1, 1A3, 1A4, 1A6, 1A7, 1A8, 1A9, 1A10, 2B4, 2B7, 2B10, 2B15, and 2B17), hrUGT1A6 and hrUGT1A9 exhibited the highest catalytic activities in the generation of p-cresol glucuronide. The kinetics of p-cresol glucuronide formation in hrUGT1A6 and pooled human liver microsomes were best described by the Hill equation and in hrUGT1A9 and pooled human kidney microsomes by substrate inhibition. Using inhibitory and selective UGT inhibitors (ie, acetaminophen or amentoflavone for UGT1A6 and niflumic acid for UGT1A9), UGT1A6 was identified the predominant enzyme responsible for p-cresol glucuronide production in pooled human liver (78.4%-81.3% contribution) and kidney (54.3%-62.9%) microsomes, whereas UGT1A9 provided minor contributions (2.8% and 35.5%, respectively). The relative contributions of UGT1A6 (72.6 ± 11.3%, mean ± SD) and UGT1A9 (5.7 ± 4.1%) in individual human liver microsomes from 12 adult donors were highly variable, where an inverse association (R = -.784, p = .003) between UGT1A6 contribution and UGT1A9 probe substrate activity (ie, mycophenolic acid) was evident. Our novel findings provide valuable tools for conducting further mechanistic studies and for designing clinical interventions to mitigate the toxicities associated with p-cresol glucuronide.
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Affiliation(s)
- Yan Rong
- Faculty of Pharmacy and Pharmaceutical Sciences, Katz Group Centre for Pharmacy and Health Research, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
| | - Tony K L Kiang
- Faculty of Pharmacy and Pharmaceutical Sciences, Katz Group Centre for Pharmacy and Health Research, University of Alberta, Edmonton, Alberta T6G 2E1, Canada
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Wang LC, Tapia LM, Tao X, Chao JE, Thwin O, Zhang H, Thijssen S, Kotanko P, Grobe N. Gut Microbiome-Derived Uremic Toxin Levels in Hemodialysis Patients on Different Phosphate Binder Therapies. Blood Purif 2021; 51:639-648. [PMID: 34375976 PMCID: PMC9393811 DOI: 10.1159/000517470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 05/27/2021] [Indexed: 11/21/2022]
Abstract
Introduction Constipation is prevalent in patients with kidney failure partly due to the use of medication, such as phosphate binders. We hypothesized that serum levels of gut microbiome-derived uremic toxins (UTOX) may be affected by the choice of phosphate binder putatively through its impact on colonic transit time. We investigated two commonly prescribed phosphate binders, sevelamer carbonate (SEV) and sucroferric oxyhydroxide (SFO), and their association with gut microbiome-derived UTOX levels in hemodialysis (HD) patients. Methods Weekly blood samples were collected from 16 anuric HD participants during the 5-week observational period. All participants were on active phosphate binder monotherapy with either SFO or SEV for at least 4 weeks prior to enrollment. Eight UTOX (7 gut microbiome-derived) and tryptophan were quantified using liquid chromatography-mass spectrometry. Serum phosphorus, nutritional, and liver function markers were also measured. For each substance, weekly individual levels, the median concentration per participant, and differences between SFO and SEV groups were reported. Patient-reported bowel movements, by the Bristol Stool Scale (BSS), and pill usage were assessed weekly. Results The SEV group reported a 3.3-fold higher frequency of BSS stool types 1 and 2 (more likely constipated, p < 0.05), whereas the SFO group reported a 1.5-fold higher frequency of BSS stool types 5–7 (more likely loose stool and diarrhea, not significant). Participants in the SFO group showed a trend toward better adherence to phosphate binder therapy (SFO: 87.6% vs. SEV: 66.6%, not significant). UTOX, serum phosphorus, nutritional and liver function markers, and tryptophan were not different between the two groups. Conclusion There was no difference in the gut microbiome-derived UTOX levels between phosphate binders (SFO vs. SEV), despite SFO therapy resulting in fewer constipated participants. This pilot study may inform study design of future clinical trials and highlights the importance of including factors beyond bowel habits and their association with UTOX levels.
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Affiliation(s)
| | | | - Xia Tao
- Renal Research Institute, New York, New York, USA
| | | | - Ohnmar Thwin
- Renal Research Institute, New York, New York, USA
| | - Hanjie Zhang
- Renal Research Institute, New York, New York, USA
| | | | - Peter Kotanko
- Renal Research Institute, New York, New York, USA.,Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Nadja Grobe
- Renal Research Institute, New York, New York, USA
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Keerthisinghe TP, Yang Q, Chow A, Fang M. Feeding state greatly modulates the effect of xenobiotics on gut microbiome metabolism: A case study of tetracycline. JOURNAL OF HAZARDOUS MATERIALS 2021; 413:125441. [PMID: 33930963 DOI: 10.1016/j.jhazmat.2021.125441] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 02/01/2021] [Accepted: 02/14/2021] [Indexed: 06/12/2023]
Abstract
The human gut microbiome is crucial in modulating host health mostly through bacterial metabolites. Chemical exposure is typical external stress which alters its composition and functionality. To date, very few studies have investigated the effect of feeding state on chemical-induced gut microbial metabolic dysregulations. Here, we set up an in vitro human gut microbiome and incorporated a metabolomics approach to investigate the effect of tetracycline (TET) at multiple doses (i.e., 10, 1, and 0.01 mg/L) on gut microbiome under the fed and fasted states. Overall, the metabolome was highly responsive at the fed state with 62 metabolites dysregulated while only 14 were altered at the fasted state under 10 mg/L (clinical TET dose). As expected, nutrient consumption was significantly inhibited under clinical TET dose at the fed state accumulating nutrients such as glutamate and leucine. Interestingly, at the fed state, TET could increase the synthesis of indole and phenyl derivatives including indole-3-aldehyde and hydrocinnamate, while inhibiting indoxyl, tryptamine, and vitamin B production, all of which have host health implications. Furthermore, metabolites like indoxyl and xanthurenic acid were still responsive at 0.01 mg/L (dietary TET dose). Collectively, results demonstrated that the feeding state greatly modulates the chemical-induced gut microbial metabolic alterations.
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Affiliation(s)
- Tharushi Prabha Keerthisinghe
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798; Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141
| | - Qin Yang
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798; Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141
| | - Agnes Chow
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798; Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141
| | - Mingliang Fang
- School of Civil and Environmental Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798; Nanyang Environment and Water Research Institute, Nanyang Technological University, Singapore 637141; Singapore Phenome Center, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 636921.
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Can curcumin supplementation reduce plasma levels of gut-derived uremic toxins in hemodialysis patients? A pilot randomized, double-blind, controlled study. Int Urol Nephrol 2021; 53:1231-1238. [PMID: 33438085 DOI: 10.1007/s11255-020-02760-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 12/15/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Gut dysbiosis is common in patients with chronic kidney disease (CKD) and is closely related to inflammatory processes. Some nutritional strategies, such as bioactive compounds present in curcumin, have been proposed as an option to modulate the gut microbiota and decrease the production of uremic toxins such as indoxyl sulfate (IS), p-cresyl sulfate (pCS) and indole-3 acetic acid (IAA). OBJECTIVE To evaluate the effects of curcumin supplementation on uremic toxins plasma levels produced by gut microbiota in patients with CKD on hemodialysis (HD). METHODS Randomized, double-blind trial in 28 patients [53.6 ± 13.4 years, fourteen men, BMI 26.7 ± 3.7 kg/m2, dialysis vintage 37.5 (12-193) months]. Fourteen patients were randomly allocated to the curcumin group and received 100 mL of orange juice with 12 g carrot and 2.5 g of turmeric and 14 patients to the control group who received the same juice but without turmeric three times per week after HD sessions for three months. IS, pCS, IAA plasma levels were measured by reverse-phase high-performance liquid chromatography RESULTS: After three months of supplementation, the curcumin group showed a significant decrease in pCS plasma levels [from 32.4 (22.1-45.9) to 25.2 (17.9-37.9) mg/L, p = 0.009], which did not occur in the control group. No statistical difference was observed in IS and IAA levels in both groups. CONCLUSION The oral supplementation of curcumin for three months seems to reduce p-CS plasma levels in HD patients, suggesting a gut microbiota modulation.
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Abstract
INTRODUCTION The colon has an important role in managing nitrogenous waste products, electrolytes, and mineral balance during kidney diseases. However, colonic microbiota produces uremic toxins, such as indoxyl sulfate and p-cresyl sulfate, in chronic kidney disease (CKD) patients, which due to their proinflammatory properties contribute to CKD progression. Conversely, in acute renal injury patients, intestinal microbiota could reduce inflammation by secreting short-chain fatty acids and inducing a renal protective immune response. However, since the intestines are the most frequently affected organ in advanced sepsis, colonic microbiota can also represent a negative factor for kidney health in this scenario. CONCLUSION In the present review, the main characteristics of kidney-gut crosstalk are described.
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Hsu CN, Tain YL. Developmental Programming and Reprogramming of Hypertension and Kidney Disease: Impact of Tryptophan Metabolism. Int J Mol Sci 2020; 21:E8705. [PMID: 33218054 PMCID: PMC7698939 DOI: 10.3390/ijms21228705] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 11/08/2020] [Accepted: 11/17/2020] [Indexed: 02/07/2023] Open
Abstract
The concept that hypertension and chronic kidney disease (CKD) originate in early life has emerged recently. During pregnancy, tryptophan is crucial for maternal protein synthesis and fetal development. On one hand, impaired tryptophan metabolic pathway in pregnancy impacts fetal programming, resulting in the developmental programming of hypertension and kidney disease in adult offspring. On the other hand, tryptophan-related interventions might serve as reprogramming strategies to prevent a disease from occurring. In the present review, we aim to summarize (1) the three major tryptophan metabolic pathways, (2) the impact of tryptophan metabolism in pregnancy, (3) the interplay occurring between tryptophan metabolites and gut microbiota on the production of uremic toxins, (4) the role of tryptophan-derived metabolites-induced hypertension and CKD of developmental origin, (5) the therapeutic options in pregnancy that could aid in reprogramming adverse effects to protect offspring against hypertension and CKD, and (6) possible mechanisms linking tryptophan metabolism to developmental programming of hypertension and kidney disease.
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Affiliation(s)
- Chien-Ning Hsu
- Department of Pharmacy, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung 833, Taiwan;
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - You-Lin Tain
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833, Taiwan
- Institute for Translational Research in Biomedicine, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung 833, Taiwan
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Mehmood A, Zhao L, Ishaq M, Zad OD, Zhao L, Wang C, Usman M, Lian Y, Xu M. Renoprotective effect of stevia residue extract on adenine-induced chronic kidney disease in mice. J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.103983] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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West KA, Kanu C, Maric T, McDonald JAK, Nicholson JK, Li JV, Johnson MR, Holmes E, Savvidou MD. Longitudinal metabolic and gut bacterial profiling of pregnant women with previous bariatric surgery. Gut 2020; 69:1452-1459. [PMID: 31964751 PMCID: PMC7398482 DOI: 10.1136/gutjnl-2019-319620] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 12/15/2022]
Abstract
OBJECTIVE Due to the global increase in obesity rates and success of bariatric surgery in weight reduction, an increasing number of women now present pregnant with a previous bariatric procedure. This study investigates the extent of bariatric-associated metabolic and gut microbial alterations during pregnancy and their impact on fetal development. DESIGN A parallel metabonomic (molecular phenotyping based on proton nuclear magnetic resonance spectroscopy) and gut bacterial (16S ribosomal RNA gene amplicon sequencing) profiling approach was used to determine maternal longitudinal phenotypes associated with malabsorptive/mixed (n=25) or restrictive (n=16) procedures, compared with women with similar early pregnancy body mass index but without bariatric surgery (n=70). Metabolic profiles of offspring at birth were also analysed. RESULTS Previous malabsorptive, but not restrictive, procedures induced significant changes in maternal metabolic pathways involving branched-chain and aromatic amino acids with decreased circulation of leucine, isoleucine and isobutyrate, increased excretion of microbial-associated metabolites of protein putrefaction (phenylacetlyglutamine, p-cresol sulfate, indoxyl sulfate and p-hydroxyphenylacetate), and a shift in the gut microbiota. The urinary concentration of phenylacetylglutamine was significantly elevated in malabsorptive patients relative to controls (p=0.001) and was also elevated in urine of neonates born from these mothers (p=0.021). Furthermore, the maternal metabolic changes induced by malabsorptive surgery were associated with reduced maternal insulin resistance and fetal/birth weight. CONCLUSION Metabolism is altered in pregnant women with a previous malabsorptive bariatric surgery. These alterations may be beneficial for maternal outcomes, but the effect of elevated levels of phenolic and indolic compounds on fetal and infant health should be investigated further.
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Affiliation(s)
- Kiana Ashley West
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - Chidimma Kanu
- Obstetrics & Gynaecology, Chelsea and Westminster Hospital, Institute of Reproductive Developmental Biology, Department of Metabolism, Digestion & Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - Tanya Maric
- Obstetrics & Gynaecology, Chelsea and Westminster Hospital, Institute of Reproductive Developmental Biology, Department of Metabolism, Digestion & Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - Julie Anne Kathryn McDonald
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - Jeremy K Nicholson
- Australian National Phenome Centre, Health Futures Institute, Murdoch University, Murdoch, Western Australia, Australia
| | - Jia V Li
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - Mark R Johnson
- Obstetrics & Gynaecology, Chelsea and Westminster Hospital, Institute of Reproductive Developmental Biology, Department of Metabolism, Digestion & Reproduction, Faculty of Medicine, Imperial College London, London, UK
| | - Elaine Holmes
- Department of Metabolism, Digestion and Reproduction, Faculty of Medicine, Imperial College London, London, UK .,Australian National Phenome Centre, Health Futures Institute, Murdoch University, Murdoch, Western Australia, Australia
| | - Makrina D Savvidou
- Obstetrics & Gynaecology, Chelsea and Westminster Hospital, Institute of Reproductive Developmental Biology, Department of Metabolism, Digestion & Reproduction, Faculty of Medicine, Imperial College London, London, UK
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Six I, Flissi N, Lenglet G, Louvet L, Kamel S, Gallet M, Massy ZA, Liabeuf S. Uremic Toxins and Vascular Dysfunction. Toxins (Basel) 2020; 12:toxins12060404. [PMID: 32570781 PMCID: PMC7354618 DOI: 10.3390/toxins12060404] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/15/2020] [Accepted: 06/17/2020] [Indexed: 02/07/2023] Open
Abstract
Vascular dysfunction is an essential element found in many cardiovascular pathologies and in pathologies that have a cardiovascular impact such as chronic kidney disease (CKD). Alteration of vasomotricity is due to an imbalance between the production of relaxing and contracting factors. In addition to becoming a determining factor in pathophysiological alterations, vascular dysfunction constitutes the first step in the development of atherosclerosis plaques or vascular calcifications. In patients with CKD, alteration of vasomotricity tends to emerge as being a new, less conventional, risk factor. CKD is characterized by the accumulation of uremic toxins (UTs) such as phosphate, para-cresyl sulfate, indoxyl sulfate, and FGF23 and, consequently, the deleterious role of UTs on vascular dysfunction has been explored. This accumulation of UTs is associated with systemic alterations including inflammation, oxidative stress, and the decrease of nitric oxide production. The present review proposes to summarize our current knowledge of the mechanisms by which UTs induce vascular dysfunction.
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Affiliation(s)
- Isabelle Six
- UR 7517 UPJV, Pathophysiological Mechanisms and Consequences of Cardiovascular Calcifications (MP3CV), Picardie Jules Verne University, 80025 Amiens, France; (N.F.); (G.L.); (L.L.); (S.K.); (M.G.); (S.L.)
- Correspondence: ; Tel./Fax: +03-22-82-54-25
| | - Nadia Flissi
- UR 7517 UPJV, Pathophysiological Mechanisms and Consequences of Cardiovascular Calcifications (MP3CV), Picardie Jules Verne University, 80025 Amiens, France; (N.F.); (G.L.); (L.L.); (S.K.); (M.G.); (S.L.)
| | - Gaëlle Lenglet
- UR 7517 UPJV, Pathophysiological Mechanisms and Consequences of Cardiovascular Calcifications (MP3CV), Picardie Jules Verne University, 80025 Amiens, France; (N.F.); (G.L.); (L.L.); (S.K.); (M.G.); (S.L.)
| | - Loïc Louvet
- UR 7517 UPJV, Pathophysiological Mechanisms and Consequences of Cardiovascular Calcifications (MP3CV), Picardie Jules Verne University, 80025 Amiens, France; (N.F.); (G.L.); (L.L.); (S.K.); (M.G.); (S.L.)
| | - Said Kamel
- UR 7517 UPJV, Pathophysiological Mechanisms and Consequences of Cardiovascular Calcifications (MP3CV), Picardie Jules Verne University, 80025 Amiens, France; (N.F.); (G.L.); (L.L.); (S.K.); (M.G.); (S.L.)
- Amiens-Picardie University Hospital, Human Biology Center, 80054 Amiens, France
| | - Marlène Gallet
- UR 7517 UPJV, Pathophysiological Mechanisms and Consequences of Cardiovascular Calcifications (MP3CV), Picardie Jules Verne University, 80025 Amiens, France; (N.F.); (G.L.); (L.L.); (S.K.); (M.G.); (S.L.)
| | - Ziad A. Massy
- Service de Néphrologie et Dialyse, Assistance Publique—Hôpitaux de Paris (APHP), Hôpital Universitaire Ambroise Paré, 92100 Boulogne Billancourt, France;
- INSERM U1018, Equipe 5, CESP (Centre de Recherche en Épidémiologie et Santé des Populations), Université Paris Saclay et Université Versailles Saint Quentin en Yvelines, 94800 Villejuif, France
| | - Sophie Liabeuf
- UR 7517 UPJV, Pathophysiological Mechanisms and Consequences of Cardiovascular Calcifications (MP3CV), Picardie Jules Verne University, 80025 Amiens, France; (N.F.); (G.L.); (L.L.); (S.K.); (M.G.); (S.L.)
- Pharmacology Department, Amiens University Hospital, 80025 Amiens, France
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Mercado-Mercado G, Blancas-Benítez FJ, Zamora-Gasga VM, Sáyago-Ayerdi SG. Mexican Traditional Plant-Foods: Polyphenols Bioavailability, Gut Microbiota Metabolism and Impact Human Health. Curr Pharm Des 2020; 25:3434-3456. [PMID: 31604412 DOI: 10.2174/1381612825666191011093753] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 10/08/2019] [Indexed: 12/12/2022]
Abstract
Functional foods have been used worldwide since ancient times, particularly, the prehispanic civilizations used several plants as medicinal foods. Nowadays, many Mexicans populations preserve their traditions and dietary patterns based on corn, beans, besides other endemic vegetables, mainly diverse varieties of chili, tomatoes and other plant-foods. It is well known that each species has a special complex mixture of bioactive compounds (BC) in which each component contributes to its overall bioactivity. These BC are plant metabolites that benefit human health by means of anti-inflammatory, immune-modulatory, and antioxidant effects. However, it becomes bioactive at human body when these BC must undergo diverse intestinal transformations, due to the action of digestive enzymes, but also by the action of microbiota metabolism. Thus, the intestinal microbiota is the key factor in the mediation of the physiological functions of dietary polyphenols. In fact, limited information is available, especially on dietary phytochemicals and metabolism in commonly available Mexican plant-foods. In this review, the bioaccesibility and bioavailability major BC from traditional Mexican plant-foods products and its potential health benefits will be discussed. Besides, we compile the scientific reports and the evidence of the impact of some Mexican plant-foods on the gut microbiota dynamic composition, specific microbial metabolites and its possible contributions to human health.
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Affiliation(s)
- Gilberto Mercado-Mercado
- Departamento de Ciencias Quimico Biologicas, Instituto de Ciencias Biomedicas, Universidad Autonoma de Ciudad Juarez, Ciudad Juarez, Chihuahua, Mexico
| | - Francisco J Blancas-Benítez
- Tecnologico Nacional de Mexico, Instituto Tecnologico de Tepic. Laboratorio Integral de Investigacion en Alimentos, Division de Estudios de Posgrado, Tepic, Nayarit, Mexico
| | - Victor M Zamora-Gasga
- Tecnologico Nacional de Mexico, Instituto Tecnologico de Tepic. Laboratorio Integral de Investigacion en Alimentos, Division de Estudios de Posgrado, Tepic, Nayarit, Mexico
| | - Sonia G Sáyago-Ayerdi
- Tecnologico Nacional de Mexico, Instituto Tecnologico de Tepic. Laboratorio Integral de Investigacion en Alimentos, Division de Estudios de Posgrado, Tepic, Nayarit, Mexico
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Zhao T, Zhang H, Yin X, Zhao H, Ma L, Yan M, Peng L, Wang Q, Dong X, Li P. Tangshen formula modulates gut Microbiota and reduces gut-derived toxins in diabetic nephropathy rats. Biomed Pharmacother 2020; 129:110325. [PMID: 32535383 DOI: 10.1016/j.biopha.2020.110325] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 05/19/2020] [Accepted: 05/23/2020] [Indexed: 12/12/2022] Open
Abstract
Growing evidence shows that diabetic kidney disease (DKD) is linked with intestinal dysbiosis from gut-derived toxins. Tangshen Formula (TSF) is a traditional Chinese herbal medicine that has been used to treat DKD. In this study, streptozotocin injection and uninephrectomy-induced diabetic nephropathy (DN) rat model was established to explore the impact of TSF on gut microbiota composition, gut-derived toxins, and the downstream inflammatory pathway of urotoxins in the kidney. TSF treatment for 12 weeks showed significant attenuation of both renal histologic injuries and urinary excretion of albumin compared with DN rats without treatment. TSF treatment also reconstructed gut dysbiosis and reduced levels of indoxyl sulfate and metabolic endotoxemia/lipopolysaccharide. MCP-1 and TNF-α were decreased by TSF both in the serum and kidney. In addition, we revealed that the inhibitory effect of TSF on renal inflammation was associated with the inhibition of aryl hydrocarbon, a receptor of indoxyl sulfate, and TLR4, thereby inhibiting JNK and NF-κB signaling in the kidney. Spearman correlation analysis found that a cluster of gut bacterial phyla and genera were significantly correlated with renal pathology, renal function, and systemic inflammation. In conclusion, orally administered TSF significantly inhibited diabetic renal injury, and modulated gut microbiota, which decreased levels of lipopolysaccharide and indoxyl sulfate, and attenuated renal inflammation. Our results indicate that TSF may be used as an agent in the prevention of gut dysbiosis and elimination of intestinal toxins in DN individuals.
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Affiliation(s)
- TingTing Zhao
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China
| | - HaoJun Zhang
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China
| | - Xingbin Yin
- Beijing University of Chinese Medicine, No. 11 Beisanhuan Donglu, Chaoyang District, Beijing 100029, China
| | - HaiLing Zhao
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China
| | - Liang Ma
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China
| | - MeiHua Yan
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China
| | - Liang Peng
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China
| | - Qian Wang
- Beijing University of Chinese Medicine, No. 11 Beisanhuan Donglu, Chaoyang District, Beijing 100029, China
| | - Xi Dong
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China
| | - Ping Li
- Beijing Key Lab for Immune-Mediated Inflammatory Diseases, Department of Pharmacology, Institute of Clinical Medical Sciences, China-Japan Friendship Hospital, Beijing 100029, PR China.
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Cirstea MS, Yu AC, Golz E, Sundvick K, Kliger D, Radisavljevic N, Foulger LH, Mackenzie M, Huan T, Finlay BB, Appel-Cresswell S. Microbiota Composition and Metabolism Are Associated With Gut Function in Parkinson's Disease. Mov Disord 2020; 35:1208-1217. [PMID: 32357258 DOI: 10.1002/mds.28052] [Citation(s) in RCA: 163] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 03/02/2020] [Accepted: 03/20/2020] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Parkinson's disease is characterized by a high burden of gastrointestinal comorbidities, especially constipation and reduced colonic transit time, and by gut microbiota alterations. The diverse metabolites produced by the microbiota are broadly relevant to host health. How microbiota composition and metabolism relate to gastrointestinal function in Parkinson's disease is largely unknown. The objectives of the current study were to assesses associations between microbiota composition, stool consistency, constipation, and systemic microbial metabolites in Parkinson's disease to better understand how intestinal microbes contribute to gastrointestinal disturbances commonly observed in patients. METHODS Three hundred participants (197 Parkinson's patients and 103 controls) were recruited for this cross-sectional cohort study. Participants supplied fecal samples for microbiota sequencing (n = 300) and serum for untargeted metabolomics (n = 125). Data were collected on motor and nonmotor Parkinson's symptoms, medications, diet, and demographics. RESULTS Significant microbiota taxonomic differences were observed in Parkinson's patients, even when controlling for gastrointestinal function. Parkinson's microbiota was characterized by reduced carbohydrate fermentation and butyrate synthesis capacity and increased proteolytic fermentation and production of deleterious amino acid metabolites, including p-cresol and phenylacetylglutamine. Taxonomic shifts and elevated proteolytic metabolites were strongly associated with stool consistency (a proxy for colonic transit time) and constipation among patients. CONCLUSIONS Compositional and metabolic alterations in the Parkinson's microbiota are highly associated with gut function, suggesting plausible mechanistic links between altered bacterial metabolism and reduced gut health in this disease. The systemic detection of elevated deleterious proteolytic microbial metabolites in Parkinson's serum suggests a mechanism whereby microbiota dysbiosis contributes to disease etiology and pathophysiology. © 2020 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Mihai S Cirstea
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada.,Michael Smith Laboratories, UBC, Vancouver, British Columbia, Canada
| | - Adam C Yu
- Pacific Parkinson's Research Centre and Djavad Mowafaghian Centre for Brain Health, UBC, Vancouver, British Columbia, Canada
| | - Ella Golz
- Pacific Parkinson's Research Centre and Djavad Mowafaghian Centre for Brain Health, UBC, Vancouver, British Columbia, Canada
| | - Kristen Sundvick
- Pacific Parkinson's Research Centre and Djavad Mowafaghian Centre for Brain Health, UBC, Vancouver, British Columbia, Canada
| | - Daniel Kliger
- Pacific Parkinson's Research Centre and Djavad Mowafaghian Centre for Brain Health, UBC, Vancouver, British Columbia, Canada
| | - Nina Radisavljevic
- Michael Smith Laboratories, UBC, Vancouver, British Columbia, Canada.,Department of Biochemistry and Molecular Biology, UBC, Vancouver, British Columbia, Canada
| | - Liam H Foulger
- Pacific Parkinson's Research Centre and Djavad Mowafaghian Centre for Brain Health, UBC, Vancouver, British Columbia, Canada
| | - Melissa Mackenzie
- Pacific Parkinson's Research Centre and Djavad Mowafaghian Centre for Brain Health, UBC, Vancouver, British Columbia, Canada.,Division of Neurology, Faculty of Medicine, UBC, Vancouver, British Columbia, Canada
| | - Tau Huan
- Department of Chemistry, UBC, Vancouver, British Columbia, Canada
| | - B Brett Finlay
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, British Columbia, Canada.,Michael Smith Laboratories, UBC, Vancouver, British Columbia, Canada.,Department of Biochemistry and Molecular Biology, UBC, Vancouver, British Columbia, Canada
| | - Silke Appel-Cresswell
- Pacific Parkinson's Research Centre and Djavad Mowafaghian Centre for Brain Health, UBC, Vancouver, British Columbia, Canada.,Division of Neurology, Faculty of Medicine, UBC, Vancouver, British Columbia, Canada
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Vacca M, Celano G, Calabrese FM, Portincasa P, Gobbetti M, De Angelis M. The Controversial Role of Human Gut Lachnospiraceae. Microorganisms 2020; 8:E573. [PMID: 32326636 PMCID: PMC7232163 DOI: 10.3390/microorganisms8040573] [Citation(s) in RCA: 790] [Impact Index Per Article: 197.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 04/05/2020] [Accepted: 04/13/2020] [Indexed: 02/06/2023] Open
Abstract
The complex polymicrobial composition of human gut microbiota plays a key role in health and disease. Lachnospiraceae belong to the core of gut microbiota, colonizing the intestinal lumen from birth and increasing, in terms of species richness and their relative abundances during the host's life. Although, members of Lachnospiraceae are among the main producers of short-chain fatty acids, different taxa of Lachnospiraceae are also associated with different intra- and extraintestinal diseases. Their impact on the host physiology is often inconsistent across different studies. Here, we discuss changes in Lachnospiraceae abundances according to health and disease. With the aim of harnessing Lachnospiraceae to promote human health, we also analyze how nutrients from the host diet can influence their growth and how their metabolites can, in turn, influence host physiology.
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Affiliation(s)
- Mirco Vacca
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126 Bari, Italy; (M.V.); (F.M.C.); (M.D.A.)
| | - Giuseppe Celano
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126 Bari, Italy; (M.V.); (F.M.C.); (M.D.A.)
| | - Francesco Maria Calabrese
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126 Bari, Italy; (M.V.); (F.M.C.); (M.D.A.)
| | - Piero Portincasa
- Clinica Medica “A. Murri”, Department of Biomedical Sciences and Human Oncology, University of Bari Medical School, 70121 Bari, Italy
| | - Marco Gobbetti
- Faculty of Science and Technology, Free University of Bozen, 39100 Bolzano, Italy;
| | - Maria De Angelis
- Department of Soil, Plant and Food Sciences, University of Bari Aldo Moro, 70126 Bari, Italy; (M.V.); (F.M.C.); (M.D.A.)
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42
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Iguchi A, Yamamoto S, Oda A, Tanaka K, Kazama JJ, Saeki T, Yamazaki H, Ishioka K, Suzutani T, Narita I. Effect of sucroferric oxyhydroxide on gastrointestinal microbiome and uremic toxins in patients with chronic kidney disease undergoing hemodialysis. Clin Exp Nephrol 2020; 24:725-733. [PMID: 32285213 DOI: 10.1007/s10157-020-01892-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 04/03/2020] [Indexed: 11/26/2022]
Abstract
BACKGROUND In patients with chronic kidney disease (CKD), dysbiosis in the gastrointestinal microbiome is thought to be associated with increased production of uremic toxins, such as indoxyl sulfate (IS) and p-cresyl sulfate (PCS). Sucroferric oxyhydroxide (SFO), an iron-based phosphate binder, may affect the gastrointestinal microbiome and the production of uremic toxins. We aimed to examine whether SFO administration affected distribution of gastrointestinal microbiome and serum uremic toxin levels in CKD patients undergoing hemodialysis. METHODS In this single-center, open-label, interventional study, 18 maintenance hemodialysis patients with hyperphosphatemia were prescribed with SFO. We collected serum samples before and after 3 months of administration, and serum levels of IS and PCS were measured. A control group of 20 hemodialysis patients without SFO was evaluated. We evaluated gastrointestinal microbiome of patients pre- and post-SFO administration by 16S rDNA sequencing and bioinformatics analysis. RESULTS Serum IS and PCS levels were significantly elevated after administration of SFO (IS before 2.52 ± 1.60 mg/dl vs. after 3.13 ± 1.51 mg/dl, P = 0.008; PCS before 2.32 ± 2.44 mg/dl vs. after 3.45 ± 2.11 mg/dl, P = 0.002), while serum IS and PCS levels did not change in the control group. Microbiome analysis in the SFO group showed no significant change in diversity and major components in phylum, class, order, family, gene, and species. CONCLUSION Administration of SFO increased the serum levels of IS and PCS with no change of major components of gastrointestinal microbiome.
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Affiliation(s)
- Akira Iguchi
- Department of Internal Medicine, Nagaoka Red-Cross Hospital, 2-297-1 Sensyu, Nagaoka, Niigata, 940-2085, Japan.
| | - Suguru Yamamoto
- Division of Blood Purification Therapy, Niigata University Medical and Dental Hospital, 1-757 Asahimachi-dori, Chuo-ku, Niigata, Niigata, 951-8510, Japan
| | - Akira Oda
- Department of Nephrology and Hypertension, Fukushima Medical University, 1 Hikariga-oka, Fukushima, Fukushima, 960-1295, Japan
| | - Kenichi Tanaka
- Department of Nephrology and Hypertension, Fukushima Medical University, 1 Hikariga-oka, Fukushima, Fukushima, 960-1295, Japan
| | - Junichiro James Kazama
- Department of Nephrology and Hypertension, Fukushima Medical University, 1 Hikariga-oka, Fukushima, Fukushima, 960-1295, Japan
| | - Takako Saeki
- Department of Internal Medicine, Nagaoka Red-Cross Hospital, 2-297-1 Sensyu, Nagaoka, Niigata, 940-2085, Japan
| | - Hajime Yamazaki
- Department of Internal Medicine, Nagaoka Red-Cross Hospital, 2-297-1 Sensyu, Nagaoka, Niigata, 940-2085, Japan
| | - Ken Ishioka
- Department of Microbiology, Fukushima Medical University, 1 Hikariga-oka, Fukushima, Fukushima, 960-1295, Japan
| | - Tatsuo Suzutani
- Department of Microbiology, Fukushima Medical University, 1 Hikariga-oka, Fukushima, Fukushima, 960-1295, Japan
| | - Ichiei Narita
- Division of Clinical Nephrology and Rheumatology, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachi-dori, Chuo-ku, Niigata, Niigata, 951-8510, Japan
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Glorieux G, Gryp T, Perna A. Gut-Derived Metabolites and Their Role in Immune Dysfunction in Chronic Kidney Disease. Toxins (Basel) 2020; 12:toxins12040245. [PMID: 32290429 PMCID: PMC7232434 DOI: 10.3390/toxins12040245] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/08/2020] [Accepted: 04/10/2020] [Indexed: 02/07/2023] Open
Abstract
Several of the uremic toxins, which are difficult to remove by dialysis, originate from the gut bacterial metabolism. This opens opportunities for novel targets trying to decrease circulating levels of these toxins and their pathophysiological effects. The current review focuses on immunomodulatory effects of these toxins both at their side of origin and in the circulation. In the gut end products of the bacterial metabolism such as p-cresol, trimethylamine and H2S affect the intestinal barrier structure and function while in the circulation the related uremic toxins stimulate cells of the immune system. Both conditions contribute to the pro-inflammatory status of patients with chronic kidney disease (CKD). Generation and/or absorption of these toxin precursors could be targeted to decrease plasma levels of their respective uremic toxins and to reduce micro-inflammation in CKD.
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Affiliation(s)
- Griet Glorieux
- Nephrology Division, Ghent University Hospital and Ghent University, 9000 Ghent, Belgium;
- Correspondence: ; Tel.: +32-9-3324511
| | - Tessa Gryp
- Nephrology Division, Ghent University Hospital and Ghent University, 9000 Ghent, Belgium;
| | - Alessandra Perna
- First Division of Nephrology, Department of Translational Medical Sciences, School of Medicine, University of Campania “Luigi Vanvitelli”, 80131 Naples, Italy;
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Chorna N, Godoy-Vitorino F. A Protocol for the Multi-Omic Integration of Cervical Microbiota and Urine Metabolomics to Understand Human Papillomavirus (HPV)-Driven Dysbiosis. Biomedicines 2020; 8:biomedicines8040081. [PMID: 32276347 PMCID: PMC7235793 DOI: 10.3390/biomedicines8040081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 04/03/2020] [Accepted: 04/06/2020] [Indexed: 12/20/2022] Open
Abstract
The multi-omic integration of microbiota data with metabolomics has gained popularity. This protocol is based on a human multi-omics study, integrating cervicovaginal microbiota, HPV status and neoplasia, with urinary metabolites. Indeed, to understand the biology of the infections and to develop adequate interventions for cervical cancer prevention, studies are needed to characterize in detail the cervical microbiota and understand the systemic metabolome. This article is a detailed protocol for the multi-omic integration of cervical microbiota and urine metabolome to shed light on the systemic effects of cervical dysbioses associated with Human Papillomavirus (HPV) infections. This methods article suggests detailed sample collection and laboratory processes of metabolomics, DNA extraction for microbiota, HPV typing, and the bioinformatic analyses of the data, both to characterize the metabolome, the microbiota, and joint multi-omic analyses, useful for the development of new point-of-care diagnostic tests based on these approaches.
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Affiliation(s)
- Nataliya Chorna
- Department of Biochemistry, UPR School of Medicine, 00921 San Juan, Puerto Rico;
| | - Filipa Godoy-Vitorino
- Department of Microbiology & Medical Zoology, UPR School of Medicine, 00921 San Juan, Puerto Rico
- Correspondence: ; Tel.: +1-787-758-2525 (ext. 2096)
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45
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Indoxyl Sulfate, a Uremic Endotheliotoxin. Toxins (Basel) 2020; 12:toxins12040229. [PMID: 32260489 PMCID: PMC7232210 DOI: 10.3390/toxins12040229] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Revised: 04/02/2020] [Accepted: 04/03/2020] [Indexed: 12/15/2022] Open
Abstract
Chronic kidney disease (CKD) is associated with a high prevalence of cardiovascular diseases. During CKD, the uremic toxin indoxyl sulfate (IS)—derived from tryptophan metabolism—accumulates. IS is involved in the pathophysiology of cardiovascular complications. IS can be described as an endotheliotoxin: IS induces endothelial dysfunction implicated in cardiovascular morbidity and mortality during CKD. In this review, we describe clinical and experimental evidence for IS endothelial toxicity and focus on the various molecular pathways implicated. In patients with CKD, plasma concentrations of IS correlate with cardiovascular events and mortality, with vascular calcification and atherosclerotic markers. Moreover, IS induces a prothrombotic state and impaired neovascularization. IS reduction by AST-120 reverse these abnormalities. In vitro, IS induces endothelial aryl hydrocarbon receptor (AhR) activation and proinflammatory transcription factors as NF-κB or AP-1. IS has a prooxidant effect with reduction of nitric oxide (NO) bioavailability. Finally, IS alters endothelial cell and endothelial progenitor cell migration, regeneration and control vascular smooth muscle cells proliferation. Reducing IS endothelial toxicity appears to be necessary to improve cardiovascular health in CKD patients.
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46
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Female AhR Knockout Mice Develop a Minor Renal Insufficiency in an Adenine-Diet Model of Chronic Kidney Disease. Int J Mol Sci 2020; 21:ijms21072483. [PMID: 32260098 PMCID: PMC7177716 DOI: 10.3390/ijms21072483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 03/31/2020] [Accepted: 04/01/2020] [Indexed: 12/16/2022] Open
Abstract
Cardiovascular complications observed in chronic kidney disease (CKD) are associated with aryl hydrocarbon receptor (AhR) activation by tryptophan-derived uremic toxins-mainly indoxyl sulfate (IS). AhR is a ligand-activated transcription factor originally characterized as a receptor of xenobiotics involved in detoxification. The aim of this study was to determine the role of AhR in a CKD mouse model based on an adenine diet. Wild-type (WT) and AhR-/- mice were fed by alternating an adenine-enriched diet and a regular diet for 6 weeks. Our results showed an increased mortality rate of AhR-/- males. AhR-/- females survived and developed a less severe renal insufficiency that WT mice, reflected by urea, creatinine, and IS measurement in serum. The protective effect was related to a decrease of pro-inflammatory and pro-fibrotic gene expression, an attenuation of tubular injury, and a decrease of 2,8-dihydroxyadenine crystal deposition in the kidneys of AhR-/- mice. These mice expressed low levels of xanthine dehydrogenase, which oxidizes adenine into 2,8-dihydroxyadenine, and low levels of the IS metabolism enzymes. In conclusion, the CKD model of adenine diet is not suitable for AhR knockout mice when studying the role of this transcription factor in cardiovascular complications, as observed in human CKD.
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47
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Urine metabolomic analysis in clear cell and papillary renal cell carcinoma: A pilot study. J Proteomics 2020; 218:103723. [DOI: 10.1016/j.jprot.2020.103723] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 02/24/2020] [Accepted: 02/25/2020] [Indexed: 12/21/2022]
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48
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Ji M, Du H, Xu Y. Structural and metabolic performance of p-cresol producing microbiota in different carbon sources. Food Res Int 2020; 132:109049. [PMID: 32331677 DOI: 10.1016/j.foodres.2020.109049] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 01/18/2020] [Accepted: 01/31/2020] [Indexed: 12/15/2022]
Abstract
p-Cresol (PC) is a potential off-flavor and carcinogenic compound that affects food flavor and safety. However, controlling the production of PC when making fermented food is hindered by a lack of knowledge of the microbial diversity and the growth requirements of the microbiota that produce PC. To address this, the present study used three media with selected carbon sources (glucose, ethanol and lactic acid) to explore the microbial origin of PC and to determine the preferred carbon source for the PC-producing microbiota in the pit mud of the strong-aroma type Baijiu. The results showed that the different carbon sources affected the microbial structure, especially of the PC-producing microbiota. Glucose led to the highest production of PC and lactic acid to the lowest. The production of PC was significantly correlated (p < 0.05, |ρ| > 0.6) with Dorea, Sporanaerobacter, Tepidimicrobium, Tissierella Soehngenia, Clostridium and Sedimentibacter in the glucose medium; with Proteiniborus, Ruminococcus and Sporanaerobacter in the ethanol medium; and with Lutispora and Tepidimicrobium in the lactic acid medium. Multiphasic metabolite target analysis further indicated that the PC-producing microbiota could also metabolize flavor compounds. Lactic acid could inhibit the production of PC and ensure that the microbiota produced the appropriate flavor compounds during culture. Collectively, Dorea, Sporanaerobacter, Tepidimicrobium, Tissierella_Soehngenia, Clostridium, Sedimentibacter, Proteiniborus, Ruminococcus and Lutispora were identified as potential PC producers in three media with glucose preferred as the carbon source. These findings provide a perspective on the microbiota and carbon source preference for ultimately improving the quality of distilled alcoholic beverage.
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Affiliation(s)
- Mei Ji
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, People's Republic of China
| | - Hai Du
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, People's Republic of China.
| | - Yan Xu
- Key Laboratory of Industrial Biotechnology of Ministry of Education, State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Biotechnology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, People's Republic of China.
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49
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Chorna N, Romaguera J, Godoy-Vitorino F. Cervicovaginal Microbiome and Urine Metabolome Paired Analysis Reveals Niche Partitioning of the Microbiota in Patients with Human Papilloma Virus Infections. Metabolites 2020; 10:E36. [PMID: 31952112 PMCID: PMC7022855 DOI: 10.3390/metabo10010036] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/11/2020] [Accepted: 01/13/2020] [Indexed: 12/31/2022] Open
Abstract
In this study, we evaluate the association between vaginal and cervical human papillomavirus infections high-risk types (HPV+H), negative controls (HPV-), the bacterial biota, and urinary metabolites via integration of metagenomics, metabolomics, and bioinformatics analysis. We recently proposed that testing urine as a biofluid could be a non-invasive method for the detection of cervical HPV+H infections by evaluating the association between cervical HPV types and a total of 24 urinary metabolites identified in the samples. As a follow-up study, we expanded the analysis by pairing the urine metabolome data with vaginal and cervical microbiota in selected samples from 19 Puerto Rican women diagnosed with HPV+H infections and HPV- controls, using a novel comprehensive framework, Model-based Integration of Metabolite Observations and Species Abundances 2 (MIMOSA2). This approach enabled us to estimate the functional activities of the cervicovaginal microbiome associated with HPV+H infections. Our results suggest that HPV+H infections could induce changes in physicochemical properties of the genital tract through which niche partitioning may occur. As a result, Lactobacillus sp. enrichment coincided with the depletion of L. iners and Shuttleworthia, which dominate under normal physiological conditions. Changes in the diversity of microbial species in HPV+H groups influence the capacity of new community members to produce or consume metabolites. In particular, the functionalities of four metabolic enzymes were predicted to be associated with the microbiota, including acylphosphatase, prolyl aminopeptidase, prolyl-tRNA synthetase, and threonyl-tRNA synthetase. Such metabolic changes may influence systemic health effects in women at risk of developing cervical cancer. Overall, even assuming the limitation of the power due to the small sample number, our study adds to current knowledge by suggesting how microbial taxonomic and metabolic shifts induced by HPV infections may influence the maintenance of microbial homeostasis and indicate that HPV+H infections may alter the ecological balance of the cervicovaginal microbiota, resulting in higher bacterial diversity.
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Affiliation(s)
- Nataliya Chorna
- Department of Biochemistry, UPR School of Medicine, San Juan 00936, Puerto Rico
- PR-INBRE Metabolomics Research Core, UPR School of Medicine, San Juan 00936, Puerto Rico
| | - Josefina Romaguera
- Department of Ob-Gyn, UPR School of Medicine, San Juan 00936, Puerto Rico;
| | - Filipa Godoy-Vitorino
- Department of Microbiology & Medical Zoology, UPR School of Medicine, San Juan 00936, Puerto Rico
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50
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Manor O, Zubair N, Conomos MP, Xu X, Rohwer JE, Krafft CE, Lovejoy JC, Magis AT. A Multi-omic Association Study of Trimethylamine N-Oxide. Cell Rep 2020; 24:935-946. [PMID: 30044989 DOI: 10.1016/j.celrep.2018.06.096] [Citation(s) in RCA: 98] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/17/2018] [Accepted: 06/22/2018] [Indexed: 01/16/2023] Open
Abstract
Trimethylamine N-oxide (TMAO) is a circulating metabolite that has been implicated in the development of atherosclerosis and cardiovascular disease (CVD). In this paper, we identify blood markers, metabolites, proteins, gut microbiota patterns, and diets that are significantly associated with levels of plasma TMAO. We find that kidney markers are strongly associated with TMAO and identify CVD-related proteins that are positively correlated with TMAO. We show that metabolites derived by the gut microbiota are strongly correlated with TMAO and that the magnitude of this correlation varies with kidney function. Moreover, we identify diet-associated patterns in the microbiome that are correlated with TMAO. These findings suggest that both the process of TMAO accumulation and the mechanism by which TMAO promotes atherosclerosis are a complex interplay between diet and the microbiome on one hand and other system-level factors such as circulating proteins, metabolites, and kidney function.
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Affiliation(s)
| | | | | | | | | | | | - Jennifer C Lovejoy
- Arivale, Inc., Seattle, WA 98104, USA; Institute for Systems Biology, Seattle, WA 98109, USA
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