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[Changes of gut microflora in newly diagnosed IgA nephropathy patients and its correlation with clinical risk factors]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2023; 55:124-132. [PMID: 36718700 PMCID: PMC9894810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
OBJECTIVE To investigate the gut microbiota in newly diagnosed IgA nephropathy patients with chronic kidney disease (CKD) stages 1-2 and the association between the gut microbiota and the clinical risk factors of IgA nephropathy. METHODS Fresh fecal samples were collected from nineteen newly diagnosed IgA nephropathy patients with CKD stages 1-2 and fifteen age- and sex-matched healthy controls. Fecal bacterial DNA was extracted and microbiota composition were characterized using 16S ribosomal RNA (16S rRNA) high-throughput sequencing for the V3-V4 region. The Illumina Miseq platform was used to analyze the results of 16S rRNA high-throughput sequencing of fecal flora. At the same time, the clinical risk factors of IgA nephropathy patients were collected to investigate the association between the gut microbiota and the clinical risk factors. RESULTS (1) At the phylum level, the abundance of Bacteroidetes was significantly reduced (P=0.046), and the abundance of Actinobacteria was significantly increased (P=0.001). At the genus level, the abundance of Escherichia-Shigella, Bifidobacte-rium, Dorea and others were significantly increased (P < 0.05). The abundance of Lachnospira, Coprococcus_2 and Sutterella was significantly reduced (P < 0.05). (2) There was no significant difference in the abundance of gut microbiota between the newly diagnosed IgA nephropathy patients and the healthy control group (P>0.05), but there were differences in the structure of the gut microbiota between the two groups. The results of LEfSe analysis showed that there were 16 differential bacteria in the newly diagnosed IgA nephropathy patients and healthy controls. Among them, the abundance of the newly diagnosed IgA nephropathy patients was increased in Enterobacteriales, Actinobacteria, Escherichia-Shigella, etc. The healthy control group was increased in Bacteroidetes and Lachnospira. (3) The result of redundancy analysis (RDA) showed that Bifidobacterium was positively correlated with serum IgA levels, 24-hour urinary protein levels and the presence of hypertension. Lachnoclostridium was positively correlated with the presence of hypertension. Escherichia-Shigella was positively correlated with urine red blood cells account. Bifidobacterium was positively correlated with the proliferation of capillaries. Faecalibacterium was positively correlated with cell/fibrocytic crescents. Ruminococcus_2 was positively correlated with mesangial cell proliferation, glomerular segmental sclerosis and renal tubular atrophy/interstitial fibrosis. CONCLUSION The gut microbiota in the newly diagnosed IgA nephropathy patients with CKD stages 1-2 is different from that of the healthy controls. Most importantly, some gut bacteria are related to the clinical risk factors of IgA nephropathy. Further research is needed to understand the potential role of these bacteria in IgA nephropathy.
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Gill PA, Muir JG, Gibson PR, van Zelm MC. A Randomized Dietary Intervention to Increase Colonic and Peripheral Blood Short-Chain Fatty Acids Modulates the Blood B- and T-cell Compartments in Healthy Humans. Am J Clin Nutr 2022; 116:1354-1367. [PMID: 36084000 PMCID: PMC9630882 DOI: 10.1093/ajcn/nqac246] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 08/15/2022] [Accepted: 09/01/2022] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Short-chain fatty acids (SCFA) have immune-modulating effects in animal models of disease. However, there is limited evidence that this may occur in humans. OBJECTIVES This study aimed to determine the effects of increased exposure to SCFA via dietary manipulation on colonic fermentation and adaptive immune cells. METHODS Twenty healthy, young adults (18-45 years of age) underwent a blinded, randomized, cross-over dietary intervention, consuming a high-SCFA producing diet and matched low-SCFA diet for 21 days with 21-day wash-out in between. SCFA were provided through resistant starch, inulin and apple cider vinegar. Blood and 3-day total fecal output were collected at baseline and at the end of each diet. Gas chromatography was used to measure fecal and plasma SCFA. Flow cytometry was used for peripheral blood immuno-phenotyping. RESULTS High-SCFA diet was associated with significantly (paired samples Wilcoxon test) higher median [IQR] fecal SCFA concentrations (86.6 [59.0] vs 75.4 [56.2] µmol/g, P = 0.02) and significantly lower median fecal ammonia concentrations (26.2 [14.7] vs 33.4 [18.5] µmol/g, P = 0.04) than the low-SCFA diet. Plasma propionate (9.87 [12.3] vs 4.72 [7.6] µmol/L, P = 0.049) and butyrate (2.85 [1.35] vs 2.02 [1.29] µmol/L, P = 0.03) were significantly higher after high-SCFA diet than after low-SCFA diet. Blood total B cells (184 [112] vs 199 [143] cells/µL, P = 0.04), naive B cells (83 [66] vs 95 [89] cells/µL, P = 0.02), Th1 cells (22 [19] vs 29 [16] cells/µL, P = 0.03) and mucosal-associated invariant T (MAIT) cells (62 [83] vs 69 [114] cells/µL, P = 0.02) were significantly lower after high-SCFA diet than low-SCFA diet. CONCLUSION Increasing colonic and peripheral blood SCFA has discrete effects on circulating immune cells in healthy humans following 3-week intervention. Further studies, e.g., in patients with inflammatory disease, are necessary to determine if these changes have immunomodulatory effects, whether these are therapeutically beneficial, and whether prolonged intake might be required. Clinical trial registry: Australian New Zealand Clinical trials registry: ACTRN12618001054202. <https://www.anzctr.org.au/Trial/Registration/TrialReview.aspx?id=375342&isReview=true>.
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Affiliation(s)
| | - Jane G Muir
- Department of Gastroenterology and Department of Immunology and Pathology, Central Clinical School, Monash University and Alfred Hospital, Melbourne, Australia
| | - Peter R Gibson
- Department of Gastroenterology and Department of Immunology and Pathology, Central Clinical School, Monash University and Alfred Hospital, Melbourne, Australia
| | - Menno C van Zelm
- Department of Immunology and Pathology, Central Clinical School, Monash University and Alfred Hospital, Melbourne, Australia
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Liang X, Zhang S, Zhang D, Hu L, Zhang L, Peng Y, Xu Y, Hou H, Zou C, Liu X, Chen Y, Lu F. Metagenomics-based systematic analysis reveals that gut microbiota Gd-IgA1-associated enzymes may play a key role in IgA nephropathy. Front Mol Biosci 2022; 9:970723. [PMID: 36090029 PMCID: PMC9449366 DOI: 10.3389/fmolb.2022.970723] [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: 06/16/2022] [Accepted: 08/09/2022] [Indexed: 11/13/2022] Open
Abstract
Background: IgA nephropathy (IgAN) is the most common type of glomerulonephritis in Asia. Its pathogenesis involves higher expression of galactose-deficient IgA1 (Gd-IgA1) and dysregulated intestinal mucosal immunity. The objective of this study was to explore whether specific gut microbiota and associated enzymes affect Gd-IgA1 in IgAN.Methods: This study carried out shotgun metagenomic sequencing with Illumina on fecal samples collected from 20 IgAN patients (IgAN group) and 20 healthy controls (HCs group) who were recruited from January 2016 to December 2018 at the Second Clinical College of Guangzhou University of Chinese Medicine. Differences analysis in gut microbiota was performed to determine the overall microbiota composition, the representative enterotypes, and the microbiota abundance. Correlations between gut microbiota and clinical indicators were assessed by Spearman’s analysis. Moreover, the functional prediction of microbial communities and the quantitative calculation of enzymes encoded by microbiome were performed using the MetaCyc pathway and the bioBakery three platform, respectively.Results:Bacteroides plebeius and Bacteroides vulgatus levels were higher, while Prevotella copri and Alistipes putredinis levels were lower in the IgAN group compared to HCs group. Enterotype I characterized by Bacteroides was closely related to the IgAN patients. Moreover, Bacteroides fragilis, Flavonifractor plautii and Ruminococcus gnavus were characteristic bacteria enriched in IgAN patients. Spearman’s correlation analysis found that Eggerthella lenta and Ruminococcus bromii were positively correlated with urine protein-creatinine ratio, while Ruminococcus gnavus showed a direct association with red blood cells in urine, and Bacteroides vulgatus and Ruminococcus gnavus were positively correlated with eGFR. These results indicated that intestinal dysbacteriosis occurred in IgAN patients and was associated with clinical and biochemical features. In addition, MetaCyc pathway analysis predicted microbiota-related metabolic pathways, including the biosynthesis of amino acids and glycans, were associated with the IgAN group. Microbial enzymes analysis highlighted that Gd-IgA1-associated α-galactosidase and α-N-acetyl-galactosaminidase secreted by Flavonifractor plautii were enriched in IgAN patients.Conclusion: These findings suggested that α-galactosidase and α-N-acetyl-galactosaminidase secreted by Flavonifractor plautii might be related to the production of Gd-IgA1, indicating that enzymes originated from abnormal intestinal microbiota may contribute to the production of Gd-IgA1 and play an important role in the pathogenesis of IgAN.
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Affiliation(s)
- Xiaolin Liang
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Simeng Zhang
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Difei Zhang
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
- Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Liang Hu
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Hunan Academy of Traditional Chinese Medicine Affiliated Hospital, Changsha, China
| | - La Zhang
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Yu Peng
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Yuan Xu
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
| | - Haijing Hou
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
- Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Chuan Zou
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
- Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Xusheng Liu
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
- Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yang Chen
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research, Guangzhou University of Chinese Medicine, Guangzhou, China
- *Correspondence: Yang Chen, ; Fuhua Lu,
| | - Fuhua Lu
- The Second Clinical College of Guangzhou University of Chinese Medicine, Guangzhou, China
- Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China
- Guangdong-Hong Kong-Macau Joint Lab on Chinese Medicine and Immune Disease Research, Guangzhou University of Chinese Medicine, Guangzhou, China
- *Correspondence: Yang Chen, ; Fuhua Lu,
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Abokor AA, McDaniel GH, Golonka RM, Campbell C, Brahmandam S, Yeoh BS, Joe B, Vijay-Kumar M, Saha P. Immunoglobulin A, an Active Liaison for Host-Microbiota Homeostasis. Microorganisms 2021; 9:2117. [PMID: 34683438 PMCID: PMC8539215 DOI: 10.3390/microorganisms9102117] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 10/01/2021] [Accepted: 10/05/2021] [Indexed: 12/12/2022] Open
Abstract
Mucosal surfaces in the gastrointestinal tract are continually exposed to native, commensal antigens and susceptible to foreign, infectious antigens. Immunoglobulin A (IgA) provides dual humoral responses that create a symbiotic environment for the resident gut microbiota and prevent the invasion of enteric pathogens. This review features recent immunological and microbial studies that elucidate the underlying IgA and microbiota-dependent mechanisms for mutualism at physiological conditions. IgA derailment and concurrent microbiota instability in pathological diseases are also discussed in detail. Highlights of this review underscore that the source of IgA and its structural form can dictate microbiota reactivity to sustain a diverse niche where both host and bacteria benefit. Other important studies emphasize IgA insufficiency can result in the bloom of opportunistic pathogens that encroach the intestinal epithelia and disseminate into circulation. The continual growth of knowledge in these subjects can lead to the development of therapeutics targeting IgA and/or the microbiota to treat life threatening diseases.
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Affiliation(s)
- Ahmed A. Abokor
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA; (A.A.A.); (R.M.G.); (B.S.Y.); (B.J.); (M.V.-K.)
| | - Grant H. McDaniel
- College of Medicine, University of Toledo, Toledo, OH 43614, USA; (G.H.M.); (C.C.); (S.B.)
| | - Rachel M. Golonka
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA; (A.A.A.); (R.M.G.); (B.S.Y.); (B.J.); (M.V.-K.)
| | - Connor Campbell
- College of Medicine, University of Toledo, Toledo, OH 43614, USA; (G.H.M.); (C.C.); (S.B.)
| | - Sreya Brahmandam
- College of Medicine, University of Toledo, Toledo, OH 43614, USA; (G.H.M.); (C.C.); (S.B.)
| | - Beng San Yeoh
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA; (A.A.A.); (R.M.G.); (B.S.Y.); (B.J.); (M.V.-K.)
| | - Bina Joe
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA; (A.A.A.); (R.M.G.); (B.S.Y.); (B.J.); (M.V.-K.)
| | - Matam Vijay-Kumar
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA; (A.A.A.); (R.M.G.); (B.S.Y.); (B.J.); (M.V.-K.)
| | - Piu Saha
- Department of Physiology & Pharmacology, University of Toledo College of Medicine and Life Sciences, Toledo, OH 43614, USA; (A.A.A.); (R.M.G.); (B.S.Y.); (B.J.); (M.V.-K.)
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Looman KIM, van Mierlo MMF, van Zelm MC, Hu C, Duijts L, de Jongste JC, Nijsten T, Pardo LM, Kiefte-de Jong JC, Moll HA, Pasmans SGMA. Increased Th22 cell numbers in a general pediatric population with filaggrin haploinsufficiency: The Generation R Study. Pediatr Allergy Immunol 2021; 32:1360-1368. [PMID: 33715246 PMCID: PMC8451856 DOI: 10.1111/pai.13502] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/09/2021] [Indexed: 12/15/2022]
Abstract
BACKGROUND Mutations in the filaggrin gene (FLG) affect epidermal barrier function and increase the risk of atopic dermatitis (AD). We hypothesized that FLG mutations affect immune cell composition in a general pediatric population. Therefore, we investigated whether school-aged children with and without FLG mutations have differences in T- and B-cell subsets. METHODS This study was embedded in a population-based prospective cohort study, the Generation R Study, and included 523 children of European genetic ancestry aged 10 years. The most common FLG mutations in the European population (R501X, S1085CfsX36, R2447X, and S3247X) were genotyped. Additionally, 11-color flow cytometry was performed on peripheral blood samples to determine helper T (Th), regulatory T (Treg), and CD27+ and CD27- memory B cells. Subset analysis was performed in 358 non-AD and 102 AD cases, assessed by parental questionnaires. RESULTS FLG mutations were observed in 8.4% of the total population and in 15.7% of the AD cases. Children with any FLG mutation had higher Th22 cell numbers compared to FLG wild-type children in the general and non-AD population. Children with and without FLG mutations had no difference in Th1, Th2, Th17, Treg, or memory B-cell numbers. Furthermore, in children with AD, FLG mutation carriership was not associated with differences in T- and B-cell subsets. CONCLUSIONS School-aged children of a general population with FLG mutations have higher Th22 cell numbers, which reflects the immunological response to the skin barrier dysfunction. FLG mutations did not otherwise affect the composition of the adaptive immunity in this general pediatric population.
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Affiliation(s)
- Kirsten I M Looman
- The Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of General Pediatrics, Erasmus MC, University Medical Center Rotterdam-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Minke M F van Mierlo
- Department of Dermatology, Erasmus MC, University Medical Center Rotterdam-Sophia Children's Hospital-Center of Pediatric Dermatology, Rotterdam, The Netherlands
| | - Menno C van Zelm
- Department Immunology and Pathology, Central Clinical School, Monash University and The Alfred Hospital, Melbourne, VIC, Australia
| | - Chen Hu
- The Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Dermatology, Erasmus MC, University Medical Center Rotterdam-Sophia Children's Hospital-Center of Pediatric Dermatology, Rotterdam, The Netherlands
| | - Liesbeth Duijts
- Department of Pediatrics, Division of Respiratory Medicine and Allergology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Pediatrics, Division of Neonatology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Johan C de Jongste
- The Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Pediatrics, Division of Respiratory Medicine and Allergology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Tamar Nijsten
- Department of Dermatology, Erasmus MC, University Medical Center Rotterdam-Sophia Children's Hospital-Center of Pediatric Dermatology, Rotterdam, The Netherlands
| | - Luba M Pardo
- Department of Dermatology, Erasmus MC, University Medical Center Rotterdam-Sophia Children's Hospital-Center of Pediatric Dermatology, Rotterdam, The Netherlands
| | - Jessica C Kiefte-de Jong
- Department of Public Health and Primary Care, Leiden University Medical Center/LUMC Campus, Leiden, The Netherlands
| | - Henriëtte A Moll
- Department of General Pediatrics, Erasmus MC, University Medical Center Rotterdam-Sophia Children's Hospital, Rotterdam, The Netherlands
| | - Suzanne G M A Pasmans
- Department of Dermatology, Erasmus MC, University Medical Center Rotterdam-Sophia Children's Hospital-Center of Pediatric Dermatology, Rotterdam, The Netherlands
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Soffritti I, D’Accolti M, Fabbri C, Passaro A, Manfredini R, Zuliani G, Libanore M, Franchi M, Contini C, Caselli E. Oral Microbiome Dysbiosis Is Associated With Symptoms Severity and Local Immune/Inflammatory Response in COVID-19 Patients: A Cross-Sectional Study. Front Microbiol 2021; 12:687513. [PMID: 34248910 PMCID: PMC8261071 DOI: 10.3389/fmicb.2021.687513] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/07/2021] [Indexed: 12/14/2022] Open
Abstract
The human oral microbiome (HOM) is the second largest microbial community after the gut and can impact the onset and progression of several localized and systemic diseases, including those of viral origin, especially for viruses entering the body via the oropharynx. However, this important aspect has not been clarified for the new pandemic human coronavirus SARS-CoV-2, causing COVID-19 disease, despite it being one of the many respiratory viruses having the oropharynx as the primary site of replication. In particular, no data are available about the non-bacterial components of the HOM (fungi, viruses), which instead has been shown to be crucial for other diseases. Consistent with this, this study aimed to define the HOM in COVID-19 patients, to evidence any association between its profile and the clinical disease. Seventy-five oral rinse samples were analyzed by Whole Genome Sequencing (WGS) to simultaneously identify oral bacteria, fungi, and viruses. To correlate the HOM profile with local virus replication, the SARS-CoV-2 amount in the oral cavity was quantified by digital droplet PCR. Moreover, local inflammation and secretory immune response were also assessed, respectively by measuring the local release of pro-inflammatory cytokines (L-6, IL-17, TNFα, and GM-CSF) and the production of secretory immunoglobulins A (sIgA). The results showed the presence of oral dysbiosis in COVID-19 patients compared to matched controls, with significantly decreased alpha-diversity value and lower species richness in COVID-19 subjects. Notably, oral dysbiosis correlated with symptom severity (p = 0.006), and increased local inflammation (p < 0.01). In parallel, a decreased mucosal sIgA response was observed in more severely symptomatic patients (p = 0.02), suggesting that local immune response is important in the early control of virus infection and that its correct development is influenced by the HOM profile. In conclusion, the data presented here suggest that the HOM profile may be important in defining the individual susceptibility to SARS-CoV-2 infection, facilitating inflammation and virus replication, or rather, inducing a protective IgA response. Although it is not possible to determine whether the alteration in the microbial community is the cause or effect of the SARS-CoV-2 replication, these parameters may be considered as markers for personalized therapy and vaccine development.
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Affiliation(s)
- Irene Soffritti
- Section of Microbiology, CIAS Research Center and LTTA, Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Ferrara, Italy
| | - Maria D’Accolti
- Section of Microbiology, CIAS Research Center and LTTA, Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Ferrara, Italy
| | - Chiara Fabbri
- Section of Dentistry, Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy
| | - Angela Passaro
- Unit of Internal Medicine, Department of Translational Medicine, University of Ferrara, Ferrara, Italy
| | - Roberto Manfredini
- Medical Clinic Unit, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Giovanni Zuliani
- Unit of Internal Medicine, Department of Translational Medicine, University of Ferrara, Ferrara, Italy
| | - Marco Libanore
- Unit of Infectious Diseases, University Hospital of Ferrara, Ferrara, Italy
| | - Maurizio Franchi
- Section of Dentistry, Department of Biomedical and Specialty Surgical Sciences, University of Ferrara, Ferrara, Italy
| | - Carlo Contini
- Section of Infectious Diseases and Dermatology, Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Elisabetta Caselli
- Section of Microbiology, CIAS Research Center and LTTA, Department of Chemical and Pharmaceutical Sciences, University of Ferrara, Ferrara, Italy
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Jacobsen EA, Jackson DJ, Heffler E, Mathur SK, Bredenoord AJ, Pavord ID, Akuthota P, Roufosse F, Rothenberg ME. Eosinophil Knockout Humans: Uncovering the Role of Eosinophils Through Eosinophil-Directed Biological Therapies. Annu Rev Immunol 2021; 39:719-757. [PMID: 33646859 PMCID: PMC8317994 DOI: 10.1146/annurev-immunol-093019-125918] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The enigmatic eosinophil has emerged as an exciting component of the immune system, involved in a plethora of homeostatic and inflammatory responses. Substantial progress has been achieved through experimental systems manipulating eosinophils in vivo, initially in mice and more recently in humans. Researchers using eosinophil knockout mice have identified a contributory role for eosinophils in basal and inflammatory processes and protective immunity. Primarily fueled by the purported proinflammatory role of eosinophils in eosinophil-associated diseases, a series of anti-eosinophil therapeutics have emerged as a new class of drugs. These agents, which dramatically deplete eosinophils, provide a valuable opportunity to characterize the consequences of eosinophil knockout humans. Herein, we comparatively describe mouse and human eosinophil knockouts. We put forth the view that human eosinophils negatively contribute to a variety of diseases and, unlike mouse eosinophils, do not yet have an identified role in physiological health; thus, clarifying all roles of eosinophils remains an ongoing pursuit.
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Affiliation(s)
- Elizabeth A Jacobsen
- Division of Allergy, Asthma and Clinical Immunology, Mayo Clinic, Scottsdale, Arizona 85259, USA;
| | - David J Jackson
- Guy's and St Thomas' Hospitals, London WC2R 2LS, United Kingdom;
- Department of Immunobiology, King's College London, London WC2R 2LS, United Kingdom
| | - Enrico Heffler
- Department of Biomedical Sciences, Humanitas University, 20090 Milan, Italy
- Personalized Medicine, Asthma and Allergy Unit, Humanitas Clinical and Research Center IRCCS, 20089 Milan, Italy;
| | - Sameer K Mathur
- Division of Allergy, Pulmonary and Critical Care Medicine, Department of Medicine, School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin 53792, USA;
| | - Albert J Bredenoord
- Department of Gastroenterology and Hepatology, Amsterdam UMC, University of Amsterdam, 1105 AZ Amsterdam, The Netherlands;
| | - Ian D Pavord
- Respiratory Medicine Unit, Oxford Respiratory NIHR BRC, Nuffield Department of Medicine, Oxford OX3 9DU, United Kingdom;
| | - Praveen Akuthota
- Division of Pulmonary, Critical Care, and Sleep Medicine, Department of Medicine, University of California, San Diego, La Jolla, California 92093, USA;
| | - Florence Roufosse
- Médecine Interne, Hôpital Erasme, Université Libre de Bruxelles, 1070 Brussels, Belgium;
| | - Marc E Rothenberg
- Division of Allergy and Immunology, Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio 45229, USA;
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Kononova S, Litvinova E, Vakhitov T, Skalinskaya M, Sitkin S. Acceptive Immunity: The Role of Fucosylated Glycans in Human Host-Microbiome Interactions. Int J Mol Sci 2021; 22:ijms22083854. [PMID: 33917768 PMCID: PMC8068183 DOI: 10.3390/ijms22083854] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 04/04/2021] [Accepted: 04/05/2021] [Indexed: 02/07/2023] Open
Abstract
The growth in the number of chronic non-communicable diseases in the second half of the past century and in the first two decades of the new century is largely due to the disruption of the relationship between the human body and its symbiotic microbiota, and not pathogens. The interaction of the human immune system with symbionts is not accompanied by inflammation, but is a physiological norm. This is achieved via microbiota control by the immune system through a complex balance of pro-inflammatory and suppressive responses, and only a disturbance of this balance can trigger pathophysiological mechanisms. This review discusses the establishment of homeostatic relationships during immune system development and intestinal bacterial colonization through the interaction of milk glycans, mucins, and secretory immunoglobulins. In particular, the role of fucose and fucosylated glycans in the mechanism of interactions between host epithelial and immune cells is discussed.
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Affiliation(s)
- Svetlana Kononova
- Department of Microbiology, State Research Institute of Highly Pure Biopreparations, 197110 St. Petersburg, Russia; (T.V.); (M.S.); (S.S.)
- Institute of Protein Research, Russian Academy of Sciences, 142290 Pushchino, Russia
- Correspondence:
| | - Ekaterina Litvinova
- Scientific-Research Institute of Neurosciences and Medicine, 630117 Novosibirsk, Russia;
- Siberian Federal Scientific Center of Agro-BioTechnologies, Russian Academy of Sciences, Krasnoobsk, 633501 Novosibirsk, Russia
| | - Timur Vakhitov
- Department of Microbiology, State Research Institute of Highly Pure Biopreparations, 197110 St. Petersburg, Russia; (T.V.); (M.S.); (S.S.)
| | - Maria Skalinskaya
- Department of Microbiology, State Research Institute of Highly Pure Biopreparations, 197110 St. Petersburg, Russia; (T.V.); (M.S.); (S.S.)
- Department of Internal Diseases, Gastroenterology and Dietetics, North-Western State Medical University Named after I.I. Mechnikov, 191015 St. Petersburg, Russia
| | - Stanislav Sitkin
- Department of Microbiology, State Research Institute of Highly Pure Biopreparations, 197110 St. Petersburg, Russia; (T.V.); (M.S.); (S.S.)
- Department of Internal Diseases, Gastroenterology and Dietetics, North-Western State Medical University Named after I.I. Mechnikov, 191015 St. Petersburg, Russia
- Institute of Perinatology and Pediatrics, Almazov National Medical Research Centre, 197341 St. Petersburg, Russia
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9
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Zhang X, Yang Y, Su J, Zheng X, Wang C, Chen S, Liu J, Lv Y, Fan S, Zhao A, Chen T, Jia W, Wang X. Age-related compositional changes and correlations of gut microbiome, serum metabolome, and immune factor in rats. GeroScience 2021; 43:709-725. [PMID: 32418021 PMCID: PMC8110635 DOI: 10.1007/s11357-020-00188-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 04/01/2020] [Indexed: 02/07/2023] Open
Abstract
Aging is a complex physiological process associated with degenerative disorder of metabolism and immune function, which contributes to the occurrence of senile diseases. The gut microbiota affects systemic inflammation in aging processes probably through metabolism, but their relationship is still unclear. In this study, 16S-rRNA-sequencing technology, gas chromatography-time-of-flight mass spectrometry (GC-TOFMS)-based metabolic profiling, and immune factor analysis combined with advanced differential and association analysis were employed to investigate the correlation between the microbiome, metabolome, and immune factors in male Wistar rats across lifespan. Our findings showed significant changes in the ileum microbiome and serum metabolome compositions across aging process. A two-level strategy was applied to demonstrate that key metabolites associated with age such as 4-hydroxyproline, proline, and lysine were clustered together and positively correlated with beneficial microbes including Bifidobacterium, Lactobacillus, and Akkermansia. Function analysis explored association between serum metabolite class and specific gut bacteria's metabolism pathways. Further correlation analysis on all the alteration patterns provided an interaction network of main immune factors such as IL-10, IgA, IgM, and IgG with key gut bacteria and serum metabolites. This study offers new insights into the relationship between immune factors, serum metabolome, and the gut microbiome.
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Affiliation(s)
- Xia Zhang
- Key Laboratory of Systems Biomedicine(Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Yuping Yang
- Key Laboratory of Systems Biomedicine(Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Juan Su
- College of Veterinary Medicine, Nanjing Agriculture University, Nanjing, 210095, China
| | - Xiaojiao Zheng
- Shanghai Key Laboratory of Diabetes Mellitus and Center for Translational Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Chongchong Wang
- Key Laboratory of Systems Biomedicine(Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Shaoqiu Chen
- Key Laboratory of Systems Biomedicine(Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Jiajian Liu
- Shanghai Key Laboratory of Diabetes Mellitus and Center for Translational Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Yingfang Lv
- Key Laboratory of Systems Biomedicine(Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Shihao Fan
- College of Veterinary Medicine, Nanjing Agriculture University, Nanjing, 210095, China
| | - Aihua Zhao
- Shanghai Key Laboratory of Diabetes Mellitus and Center for Translational Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China
| | - Tianlu Chen
- Shanghai Key Laboratory of Diabetes Mellitus and Center for Translational Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China.
| | - Wei Jia
- Shanghai Key Laboratory of Diabetes Mellitus and Center for Translational Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai, 200233, China.
| | - Xiaoyan Wang
- Key Laboratory of Systems Biomedicine(Ministry of Education), Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, 200240, China.
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10
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Koulouridi A, Messaritakis I, Gouvas N, Tsiaoussis J, Souglakos J. Immunotherapy in Solid Tumors and Gut Microbiota: The Correlation-A Special Reference to Colorectal Cancer. Cancers (Basel) 2020; 13:cancers13010043. [PMID: 33375686 PMCID: PMC7795476 DOI: 10.3390/cancers13010043] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/16/2020] [Accepted: 12/22/2020] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Immunotherapy and immune checkpoint inhibitors have become the breakthrough treatment with extended responses and survival rates in various neoplasms. They use the immune system to defeat cancer, while gut microbiota seems to play a significant role in that attempt. To date, colorectal cancer patients have gained little benefit from immunotherapy. Only mismatch repair-deficient/microsatellite-unstable tumors seem to respond positively to immunotherapy. However, gut microbiota could be the key to expanding the use of immunotherapy to a greater range of colorectal cancer patients. In the current review study, the authors aimed to present and analyze the mechanisms of action and resistance of immunotherapy and the types of immune checkpoint inhibitors (ICIs) as well as their correlation to gut microbiota. A special reference will be made in the association of immunotherapy and gut microbiota in the colorectal cancer setting. Abstract Over the last few years, immunotherapy has been considered as a key player in the treatment of solid tumors. Immune checkpoint inhibitors (ICIs) have become the breakthrough treatment, with prolonged responses and improved survival results. ICIs use the immune system to defeat cancer by breaking the axes that allow tumors to escape immune surveillance. Innate and adaptive immunity are involved in mechanisms against tumor growth. The gut microbiome and its role in such mechanisms is a relatively new study field. The presence of a high microbial variation in the gut seems to be remarkably important for the efficacy of immunotherapy, interfering with innate immunity. Metabolic and immunity pathways are related with specific gut microbiota composition. Various studies have explored the composition of gut microbiota in correlation with the effectiveness of immunotherapy. Colorectal cancer (CRC) patients have gained little benefit from immunotherapy until now. Only mismatch repair-deficient/microsatellite-unstable tumors seem to respond positively to immunotherapy. However, gut microbiota could be the key to expanding the use of immunotherapy to a greater range of CRC patients.
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Affiliation(s)
- Asimina Koulouridi
- Laboratory of Translational Oncology, School of Medicine, University of Crete, 70013 Heraklion, Greece;
| | - Ippokratis Messaritakis
- Laboratory of Translational Oncology, School of Medicine, University of Crete, 70013 Heraklion, Greece;
- Correspondence: (I.M.); (J.S.); Tel.: +30-28-1039-4926 (I.M.); +30-28-1039-4712 (J.S.)
| | - Nikolaos Gouvas
- Medical School, University of Cyprus, 20537 Nicosia, Cyprus;
| | - John Tsiaoussis
- Department of Anatomy, School of Medicine, University of Crete, 70013 Heraklion, Greece;
| | - John Souglakos
- Laboratory of Translational Oncology, School of Medicine, University of Crete, 70013 Heraklion, Greece;
- Department of Medical Oncology, University Hospital of Heraklion, 71110 Heraklion, Greece
- Correspondence: (I.M.); (J.S.); Tel.: +30-28-1039-4926 (I.M.); +30-28-1039-4712 (J.S.)
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11
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Dai Z, Zhang J, Wu Q, Fang H, Shi C, Li Z, Lin C, Tang D, Wang D. Intestinal microbiota: a new force in cancer immunotherapy. Cell Commun Signal 2020; 18:90. [PMID: 32522267 PMCID: PMC7288675 DOI: 10.1186/s12964-020-00599-6] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Accepted: 05/18/2020] [Indexed: 02/07/2023] Open
Abstract
Cancer displays high levels of heterogeneity and mutation potential, and curing cancer remains a challenge that clinicians and researchers are eager to overcome. In recent years, the emergence of cancer immunotherapy has brought hope to many patients with cancer. Cancer immunotherapy reactivates the immune function of immune cells by blocking immune checkpoints, thereby restoring the anti-tumor activity of immune cells. However, immune-related adverse events are a common complication of checkpoint blockade, which might be caused by the physiological role of checkpoint pathways in regulating adaptive immunity and preventing autoimmunity. In this context, the intestinal microbiota has shown great potential in the immunotherapy of cancer. The intestinal microbiota not only regulates the immune function of the body, but also optimizes the therapeutic effect of immune checkpoint inhibitors, thus reducing the occurrence of complications. Therefore, manipulating the intestinal microbiota is expected to enhance the effectiveness of immune checkpoint inhibitors and reduce adverse reactions, which will lead to new breakthroughs in immunotherapy and cancer management. Video abstract.
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Affiliation(s)
- Zhujiang Dai
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Jingqiu Zhang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
| | - Qi Wu
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Huiwen Fang
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Chunfeng Shi
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Zhen Li
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Chaobiao Lin
- Clinical Medical college, Yangzhou University, Yangzhou, Jiangsu Province China
| | - Dong Tang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
| | - Daorong Wang
- Department of General Surgery, Institute of General Surgery, Clinical Medical College, Yangzhou University, Northern Jiangsu People’s Hospital, Yangzhou, 225001 P. R. China
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12
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Grosserichter-Wagener C, Franco-Gallego A, Ahmadi F, Moncada-Vélez M, Dalm VA, Rojas JL, Orrego JC, Correa Vargas N, Hammarström L, Schreurs MW, Dik WA, van Hagen PM, Boon L, van Dongen JJ, van der Burg M, Pan-Hammarström Q, Franco JL, van Zelm MC. Defective formation of IgA memory B cells, Th1 and Th17 cells in symptomatic patients with selective IgA deficiency. Clin Transl Immunology 2020; 9:e1130. [PMID: 32355559 PMCID: PMC7190975 DOI: 10.1002/cti2.1130] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 03/12/2020] [Accepted: 03/30/2020] [Indexed: 12/16/2022] Open
Abstract
Objective Selective IgA deficiency (sIgAD) is the most common primary immunodeficiency in Western countries. Patients can suffer from recurrent infections and autoimmune diseases because of a largely unknown aetiology. To increase insights into the pathophysiology of the disease, we studied memory B and T cells and cytokine concentrations in peripheral blood. Methods We analysed 30 sIgAD patients (12 children, 18 adults) through detailed phenotyping of peripheral B‐cell, CD8+ T‐cell and CD4+ T‐cell subsets, sequence analysis of IGA and IGG transcripts, in vitro B‐cell activation and blood cytokine measurements. Results All patients had significantly decreased numbers of T‐cell‐dependent (TD; CD27+) and T‐cell‐independent (TI; CD27−) IgA memory B cells and increased CD21low B‐cell numbers. IgM+IgD− memory B cells were decreased in children and normal in adult patients. IGA and IGG transcripts contained normal SHM levels. In sIgAD children, IGA transcripts more frequently used IGA2 than controls (58.5% vs. 25.1%), but not in adult patients. B‐cell activation after in vitro stimulation was normal. However, adult sIgAD patients exhibited increased blood levels of TGF‐β1, BAFF and APRIL, whereas they had decreased Th1 and Th17 cell numbers. Conclusion Impaired IgA memory formation in sIgAD patients is not due to a B‐cell activation defect. Instead, decreased Th1 and Th17 cell numbers and high blood levels of BAFF, APRIL and TGF‐β1 might reflect disturbed regulation of IgA responses in vivo. These insights into B‐cell extrinsic immune defects suggest the need for a broader immunological focus on genomics and functional analyses to unravel the pathogenesis of sIgAD.
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Affiliation(s)
| | | | - Fatemeh Ahmadi
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands
| | - Marcela Moncada-Vélez
- Grupo de Inmunodeficiencias Primarias Universidad de Antioquia UdeA Medellín Colombia
| | - Virgil Ash Dalm
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands.,Department of Internal Medicine Erasmus MC University Medical Center Rotterdam The Netherlands
| | - Jessica Lineth Rojas
- Grupo de Inmunodeficiencias Primarias Universidad de Antioquia UdeA Medellín Colombia
| | - Julio César Orrego
- Grupo de Inmunodeficiencias Primarias Universidad de Antioquia UdeA Medellín Colombia
| | - Natalia Correa Vargas
- Grupo de Inmunodeficiencias Primarias Universidad de Antioquia UdeA Medellín Colombia
| | - Lennart Hammarström
- Clinical Immunology Department of Laboratory Medicine Karolinska Institutet at Karolinska University Hospital Huddinge Sweden
| | - Marco Wj Schreurs
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands
| | - Willem A Dik
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands
| | - P Martin van Hagen
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands.,Department of Internal Medicine Erasmus MC University Medical Center Rotterdam The Netherlands
| | | | - Jacques Jm van Dongen
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands.,Department of Immunohematology and Blood Transfusion Leiden University Medical Center Leiden The Netherlands
| | - Mirjam van der Burg
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands.,Laboratory for Immunology Department of Pediatrics Leiden University Medical Center Leiden The Netherlands
| | - Qiang Pan-Hammarström
- Clinical Immunology Department of Laboratory Medicine Karolinska Institutet at Karolinska University Hospital Huddinge Sweden
| | - José L Franco
- Grupo de Inmunodeficiencias Primarias Universidad de Antioquia UdeA Medellín Colombia
| | - Menno C van Zelm
- Department of Immunology Erasmus MC University Medical Center Rotterdam The Netherlands.,Department of Immunology and Pathology Central Clinical School Monash University and The Alfred Hospital Melbourne VIC Australia.,The Jeffrey Modell Diagnostic and Research Center for Primary Immunodeficiencies in Melbourne Melbourne VIC Australia
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13
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Hu X, Du J, Xie Y, Huang Q, Xiao Y, Chen J, Yan S, Gong Z, Ouyang S. Fecal microbiota characteristics of Chinese patients with primary IgA nephropathy: a cross-sectional study. BMC Nephrol 2020; 21:97. [PMID: 32169051 PMCID: PMC7071635 DOI: 10.1186/s12882-020-01741-9] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Accepted: 02/26/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Growing evidence has shown that the gut-renal connection and gut microbiota dysbiosis play a critical role in immunoglobulin A nephropathy (IgAN). However, the fecal microbiome profile in Chinese patients with IgAN remains unknown. A cross-sectional study was designed for the first time to investigate the fecal microbiota compositions in patients with primary IgAN in China and to evaluate the relationship between the fecal microbiome and IgAN clinical presentation. METHODS Fecal samples were collected from 17 IgAN patients and 18 age-, sex-, and body mass index-matched healthy controls, and bacterial DNA was extracted for 16S ribosomal RNA gene sequencing targeting the V3-V4 region. RESULTS Fecal samples from the IgAN patients and healthy controls showed differences in gut microbiota community richness and compositions. Compared to the healthy controls, IgAN patients at the phylum level had an increased abundance of Fusobacteria, but a decreased abundance of Synergistetes. The significantly increased genera in the IgAN group were Escherichia-Shigella, Hungatella, and Eggerthella, all of which possess pathogenic potential. Furthermore, the genus Escherichia-Shigella was negatively associated with the estimated glomerular filtration rate (eGFR) but was positively associated with the urinary albumin-to-creatinine ratio (uACR). However, the genus rectale_group was present in the IgAN group with a low abundance and was negatively associated with the uACR. Functional analysis disclosed that infection-related pathways were enriched in the IgAN group. CONCLUSIONS We demonstrate that gut microbiota dysbiosis occurs in patients with IgAN, and that changes in gut bacterial populations are closely related to IgAN clinical features, suggesting that certain specific gut microbiota may be a potential therapeutic target for IgAN.
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Affiliation(s)
- Xiaofang Hu
- Department of Pharmacy, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China
| | - Jie Du
- Department of Pharmacy, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China
| | - Yuhong Xie
- Department of Pharmacy, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China
| | - Qiong Huang
- Department of Pharmacy, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China
| | - Yi Xiao
- Department of Pharmacy, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China
| | - Juan Chen
- Department of Nephrology, Hunan Provincial People's Hospital, The first-affiliated hospital of Hunan normal university, No. 61 Jie-fang West Road, Fu-Rong District, Changsha, 410005, Hunan, China
| | - Siyuan Yan
- Department of Nephrology, Hunan Provincial People's Hospital, The first-affiliated hospital of Hunan normal university, No. 61 Jie-fang West Road, Fu-Rong District, Changsha, 410005, Hunan, China
| | - Zhicheng Gong
- Department of Pharmacy, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China. .,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, No. 87 Xiangya Road, Kaifu District, Changsha, 410008, Hunan, China.
| | - Shaxi Ouyang
- Department of Nephrology, Hunan Provincial People's Hospital, The first-affiliated hospital of Hunan normal university, No. 61 Jie-fang West Road, Fu-Rong District, Changsha, 410005, Hunan, China.
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14
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SEURA T, FUKUWATARI T. Differences in gut microbial patterns associated with salivary biomarkers in young Japanese adults. BIOSCIENCE OF MICROBIOTA, FOOD AND HEALTH 2020; 39:243-249. [PMID: 33117623 PMCID: PMC7573114 DOI: 10.12938/bmfh.2019-034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Accepted: 07/11/2020] [Indexed: 12/22/2022]
Abstract
Recent evidence suggests that psychological stress is associated with gut microbiota;
however, there are no reports of its association with gut microbial structure. This
cross-sectional study examined the relationship between psychological stress and gut
microbial patterns in young Japanese adults. Analysis of fecal microbiota was performed
using terminal restriction fragment length polymorphism (T-RFLP). Psychological stress was
assessed using salivary biomarkers, including cortisol, alpha-amylase, and secretory IgA
(S-IgA). Fecal microbial patterns were defined using principal component analysis of the
T-RFLP profile and were classified into two enterotype-like clusters, which were defined
by the B (microbiota dominated by Bacteroides) and BL patterns
(microbiota dominated by Bifidobacterium and
Lactobacillales), respectively. The Simpson index was significantly
higher for the BL pattern than for the B pattern. The salivary cortisol level was
significantly lower for the BL pattern than for the B pattern. Salivary alpha-amylase and
S-IgA levels showed a negative correlation with the Simpson index. Our results raise the
possibility that salivary biomarkers may be involved in the observed differences in
microbial patterns.
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Affiliation(s)
- Takahiro SEURA
- Department of Sports and Health Sciences, Faculty of Health and Medical Sciences, Aichi Shukutoku University, 2-9 Katahira, Nagakute, Aichi 480-1197, Japan
- Graduate School of Human Cultures, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga 522-8533, Japan
- Department of Home Economics and Technology Education, Hokkaido University of Education, 9 Hokumon-cho, Asahikawa, Hokkaido 070-8621, Japan
| | - Tsutomu FUKUWATARI
- Graduate School of Human Cultures, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone, Shiga 522-8533, Japan
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