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Wen L, Han Z. Identification and validation of xenobiotic metabolism-associated prognostic signature based on five genes to evaluate immune microenvironment in colon cancer. J Gastrointest Oncol 2021; 12:2788-2802. [PMID: 35070407 PMCID: PMC8748051 DOI: 10.21037/jgo-21-655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 11/25/2021] [Indexed: 11/06/2022] Open
Abstract
BACKGROUND Xenobiotic metabolism plays an important role in the progression of colon cancer; however, little is known about its related biomarkers. This study sought to construct a prognostic model related to xenobiotic metabolism in colon cancer, and further reveal the characteristics of tumor immune microenvironment based on the prognostic model. METHODS Transcriptome data of 41 normal colon tissues and 473 colon tumor tissues and the clinical features of 452 colon cancer patients were downloaded from The Cancer Genome Atlas (TCGA) database. Data on xenobiotic metabolism genes (XMGs) were obtained from the hallmark xenobiotic metabolism set of the Molecular Signatures Database (MSigDB) and articles. Additionally, data on differential XMGs in colon cancer were acquired for a functional enrichment analysis by R software. An XMG prognostic model was constructed by a Cox regression analysis, and evaluated using Kaplan-Meier survival curves, risk curves, receiver operating characteristic (ROC) curves, and an independent prognostic analysis in a training cohort and validation cohort. Moreover, tumor immune infiltration and negative regulatory immune genes of cancer-immunity cycle (CIC), including immune checkpoints and immune cytokines, were further analyzed between low- and high-risk groups in both the training and validation cohorts. Differences with P value <0.05 were interpreted as statistically significant. RESULTS A total of 126 differential XMGs were distinguished in the colon cancer data set, which were mainly enriched in the metabolism pathways of drugs and nutrients. There were 5 optimized genes (i.e., CYP2W1, GSTM1, TGFB2, MPP2, and ACOX1) used to construct the prognosis model, which effectively predicted prognosis and had good ROC curves. Between low- and high-risk groups, there were significant differences in abundance for T cells CD4 memory resting and T cells regulatory (Tregs), and expression of PDCD1, LAG3, NOS3, TGFB1, and ICAM1 in the training cohort and validation cohort. CONCLUSIONS The XMGs in the prognostic model have a good prediction effect on the prognosis of colon cancer patients. The T cells CD4 memory resting, and Tregs, immune checkpoints PDCD1 and LAG3, and CIC negative regulatory immune cytokines NOS3, TGFB1, and ICAM1 are closely associated with xenobiotic metabolism.
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Affiliation(s)
- Lina Wen
- Department of Clinical Nutrition, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Zongqiang Han
- Department of Laboratory Medicine, Beijing Xiaotangshan Hospital, Beijing, China
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152
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Vazquez-Rivera E, Rojas B, Parrott JC, Shen AL, Xing Y, Carney PR, Bradfield CA. The aryl hydrocarbon receptor as a model PAS sensor. Toxicol Rep 2021; 9:1-11. [PMID: 34950569 PMCID: PMC8671103 DOI: 10.1016/j.toxrep.2021.11.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 11/19/2021] [Accepted: 11/24/2021] [Indexed: 01/02/2023] Open
Abstract
Proteins containing PER-ARNT-SIM (PAS) domains are commonly associated with environmental adaptation in a variety of organisms. The PAS domain is found in proteins throughout Archaea, Bacteria, and Eukarya and often binds small-molecules, supports protein-protein interactions, and transduces input signals to mediate an adaptive physiological response. Signaling events mediated by PAS sensors can occur through induced phosphorelays or genomic events that are often dependent upon PAS domain interactions. In this perspective, we briefly discuss the diversity of PAS domain containing proteins, with particular emphasis on the prototype member, the aryl hydrocarbon receptor (AHR). This ligand-activated transcription factor acts as a sensor of the chemical environment in humans and many chordates. We conclude with the idea that since mammalian PAS proteins often act through PAS-PAS dimers, undocumented interactions of this type may link biological processes that we currently think of as independent. To support this idea, we present a framework to guide future experiments aimed at fully elucidating the spectrum of PAS-PAS interactions with an eye towards understanding how they might influence environmental sensing in human and wildlife populations.
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Affiliation(s)
- Emmanuel Vazquez-Rivera
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Brenda Rojas
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Jessica C. Parrott
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Anna L. Shen
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Yongna Xing
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Patrick R. Carney
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
| | - Christopher A. Bradfield
- Molecular and Environmental Toxicology Center, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
- McArdle Laboratory for Cancer Research, University of Wisconsin School of Medicine and Public Health, Madison, WI 53706, United States
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153
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Aryl Hydrocarbon Receptor Repressor Is Hypomethylated in Psoriasis and Promotes Psoriasis-like Inflammation in HaCaT Cells. Int J Mol Sci 2021; 22:ijms222312715. [PMID: 34884515 PMCID: PMC8657998 DOI: 10.3390/ijms222312715] [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: 10/18/2021] [Revised: 11/17/2021] [Accepted: 11/17/2021] [Indexed: 11/17/2022] Open
Abstract
It is known that DNA hypomethylation of aryl hydrocarbon receptor repressor (AhRR), one of the epigenetic markers of environmental pollutants, causes skin diseases. However, the function and mechanisms are still unknown. We aimed to determine whether AhRR is hypomethylated in PBMC of psoriasis patients, as well as to examine the expression of psoriasis-related inflammatory cytokines and antimicrobial peptides after 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) treatment in HaCaT cells overexpressing or silencing AhRR. AhRR was determined by qPCR, Western blot, immunohistochemistry, and immunocytochemistry in skin tissue and HaCaT cells. DNA methylation of AhRR was performed by Infinium Human Methylation450 BeadChip in PBMC of psoriasis patients and methylation-specific PCR (MSP) in HaCaT cells. NF-κB pp50 translocation and activity were performed by immunocytochemistry and luciferase reporter assay, respectively. We verified AhRR gene expression in the epidermis from psoriasis patients and healthy controls. AhRR hypomethylation in PBMC of psoriasis patients and pAhRR-HaCaT cells was confirmed. The expression level of AhRR was increased in both TCDD-treated HaCaT cells and pAhRR-HaCaT cells. NF-κB pp50 translocation and activity increased with TCDD. Our results showed that AhRR was hypomethylated and overexpressed in the lesional skin of patients with psoriasis, thereby increasing AhRR gene expression and regulating pro-inflammatory cytokines through the NF-κB signaling pathway in TCDD-treated HaCaT cells.
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154
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Niu H, Zhou X, Gong P, Jiao Y, Zhang J, Wu Y, Lyu L, Liang C, Chen S, Han X, Zhang L. Effect of Lactobacillus rhamnosus MN-431 Producing Indole Derivatives on Complementary Feeding-Induced Diarrhea Rat Pups Through the Enhancement of the Intestinal Barrier Function. Mol Nutr Food Res 2021; 66:e2100619. [PMID: 34806832 DOI: 10.1002/mnfr.202100619] [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] [Received: 06/25/2021] [Revised: 10/26/2021] [Indexed: 12/22/2022]
Abstract
SCOPE Many infants suffer from complementary feeding-induced diarrhea (CFID). Studies have shown that intestinal microbes can enhance the intestinal barrier and prevent diarrhea by producing indole derivatives that promote pregnane X receptor (PXR) expression. METHODS AND RESULTS In this study, the indole test and determination of the PXR concentration are performed on tryptophan broth cultures of 320-suspected Lactobacillus and Enterococcus strains. Four strains that produce indole derivatives that promote the expression of PXR are screened as potential functional probiotics. Both Lactobacillus rhamnosus MN-431 (L. rhamnosus MN-431) and Lactobacillus oris FN-448 (L. oris FN-448) can colonize the intestine of rat pups, and L. rhamnosus MN-431 can significantly decrease the incidence of diarrhea and intestinal permeability in rat pups. Using real-time qPCR and the analysis of the intestinal morphology using immunohistochemistry, it is observed that the metabolized tryptophan from L. rhamnosus MN-431 can reduce small intestinal mucosal damage by stimulating PXR/NF-κB signaling and activating PXR and aryl hydrocarbon receptor. The intestinal barrier is also enhanced by promoting the expression of tight junction proteins such as Occludin and zonula occludens-1 in baby rats. CONCLUSION The results demonstrate that L. rhamnosus MN-431 can metabolize tryptophan to prevent infantile CFID by promoting the expression of PXR.
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Affiliation(s)
- Haiyue Niu
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | | | - Pimin Gong
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
| | - Yuehua Jiao
- Drug Safety Evaluation Center, Heilongjiang University of Chinese Medicine, Harbin, Heilongjiang, 150040, China
| | - Jiliang Zhang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Yifan Wu
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Linzheng Lyu
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Cong Liang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Shiwei Chen
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Xue Han
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China
| | - Lanwei Zhang
- College of Food Science and Engineering, Ocean University of China, Qingdao, 266003, China
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155
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Fling RR, Zacharewski TR. Aryl Hydrocarbon Receptor (AhR) Activation by 2,3,7,8-Tetrachlorodibenzo- p-Dioxin (TCDD) Dose-Dependently Shifts the Gut Microbiome Consistent with the Progression of Non-Alcoholic Fatty Liver Disease. Int J Mol Sci 2021; 22:12431. [PMID: 34830313 PMCID: PMC8625315 DOI: 10.3390/ijms222212431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2021] [Revised: 11/16/2021] [Accepted: 11/16/2021] [Indexed: 11/17/2022] Open
Abstract
Gut dysbiosis with disrupted enterohepatic bile acid metabolism is commonly associated with non-alcoholic fatty liver disease (NAFLD) and recapitulated in a NAFLD-phenotype elicited by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in mice. TCDD induces hepatic fat accumulation and increases levels of secondary bile acids, including taurolithocholic acid and deoxycholic acid (microbial modified bile acids involved in host bile acid regulation signaling pathways). To investigate the effects of TCDD on the gut microbiota, the cecum contents of male C57BL/6 mice orally gavaged with sesame oil vehicle or 0.3, 3, or 30 µg/kg TCDD were examined using shotgun metagenomic sequencing. Taxonomic analysis identified dose-dependent increases in Lactobacillus species (i.e., Lactobacillus reuteri). Increased species were also associated with dose-dependent increases in bile salt hydrolase sequences, responsible for deconjugation reactions in secondary bile acid metabolism. Increased L. reuteri levels were further associated with mevalonate-dependent isopentenyl diphosphate (IPP) biosynthesis and o-succinylbenzoate synthase, a menaquinone biosynthesis associated gene. Analysis of the gut microbiomes from cirrhosis patients identified an increased abundance of genes from the mevalonate-dependent IPP biosynthesis as well as several other menaquinone biosynthesis genes, including o-succinylbenzoate synthase. These results extend the association of lactobacilli with the AhR/intestinal axis in NAFLD progression and highlight the similarities between TCDD-elicited phenotypes in mice to human NAFLD.
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Affiliation(s)
- Russell R. Fling
- Department of Microbiology and Molecular Genetics, Michigan State University, East Lansing, MI 48824, USA;
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, USA
| | - Timothy R. Zacharewski
- Institute for Integrative Toxicology, Michigan State University, East Lansing, MI 48824, USA
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI 48824, USA
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156
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Jia Y, Zhao Y, Zhang Z, Shi L, Fang Y, Chang C. Aryl hydrocarbon receptor signaling pathway plays important roles in the proliferative and metabolic properties of bone marrow mesenchymal stromal cells. Acta Biochim Biophys Sin (Shanghai) 2021; 53:1428-1439. [PMID: 34508548 DOI: 10.1093/abbs/gmab122] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Indexed: 02/07/2023] Open
Abstract
Bone marrow mesenchymal stromal cells (BMMSCs) are widely sourced and easily amplified in vitro; thus, they have a great potential in the treatment of hemopathies. Recent findings suggested that BMMSCs express the aryl hydrocarbon receptor (AHR). However, few studies have reported on the regulation of proliferative behaviors and metabolism by AHR in BMMSCs. In the present study, we found that activating AHR reduced the proliferation of BMMSCs and enhanced their mitochondrial function, whereas inhibiting AHR exerted the opposite effects. This study may provide the basis for further unveiling the molecular mechanisms and therapeutic potential of AHR in BMMSCs.
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Affiliation(s)
- Yan Jia
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Youshan Zhao
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Zheng Zhang
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Lei Shi
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Ying Fang
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Chunkang Chang
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
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157
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Brown H, Esterházy D. Intestinal immune compartmentalization: implications of tissue specific determinants in health and disease. Mucosal Immunol 2021; 14:1259-1270. [PMID: 34211125 DOI: 10.1038/s41385-021-00420-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 05/05/2021] [Accepted: 05/24/2021] [Indexed: 02/04/2023]
Abstract
The emerging concept of tissue specific immunity has opened the gates to new inquiries into what factors drive immune cell niche adaptation and the implications on immune homeostasis, organ specific immune diseases, and therapeutic efficacy. These issues are particularly complicated at barrier sites, which are directly exposed to an ever-changing environment. In particular, the gastrointestinal (GI) tract faces even further challenges given the profound functional and structural differences along its length, raising the possibility that it may even have to be treated as multiple organs when seeking to answer these questions. In this review, we evaluate what is known about the tissue intrinsic and extrinsic factors shaping immune compartments in the intestine. We then discuss the physiological and pathological consequences of a regionally distinct immune system in a single organ, but also discuss where our insight into the role of the compartment for disease development is still very limited. Finally, we discuss the technological and therapeutic implications this compartmentalization has. While the gut is perhaps one of the most intensely studied systems, many of these aspects apply to understanding tissue specific immunity of other organs, most notably other barrier sites such as skin, lung, and the urogenital tract.
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Affiliation(s)
- Hailey Brown
- Committee on Immunology, University of Chicago, Chicago, IL, USA
| | - Daria Esterházy
- Committee on Immunology, University of Chicago, Chicago, IL, USA. .,Department of Pathology, University of Chicago, Chicago, IL, USA.
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158
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Zhu T, Mao J, Zhong Y, Huang C, Deng Z, Cui Y, Liu J, Wang H. L. reuteri ZJ617 inhibits inflammatory and autophagy signaling pathways in gut-liver axis in piglet induced by lipopolysaccharide. J Anim Sci Biotechnol 2021; 12:110. [PMID: 34641957 PMCID: PMC8513206 DOI: 10.1186/s40104-021-00624-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 08/01/2021] [Indexed: 01/14/2023] Open
Abstract
Background This study investigated the protective effects of L. reuteri ZJ617 on intestinal and liver injury and the underlying mechanisms in modulating inflammatory, autophagy, and apoptosis signaling pathways in a piglet challenged with lipopolysaccharide (LPS). Methods Duroc × Landrace × Large White piglets were assigned to 3 groups (n = 6/group): control (CON) and LPS groups received oral phosphate-buffered saline for 2 weeks before intraperitoneal injection (i.p.) of physiological saline or LPS (25 μg/kg body weight), respectively, while the ZJ617 + LPS group was orally inoculated with ZJ617 for 2 weeks before i.p. of LPS. Piglets were sacrificed 4 h after LPS injection to determine intestinal integrity, serum biochemical parameters, inflammatory signaling involved in molecular and liver injury pathways. Results Compared with controls, LPS stimulation significantly increased intestinal phosphorylated-p38 MAPK, phosphorylated-ERK and JNK protein levels and decreased IκBα protein expression, while serum LPS, TNF-α, and IL-6 concentrations (P < 0.05) increased. ZJ617 pretreatment significantly countered the effects induced by LPS alone, with the exception of p-JNK protein levels. Compared with controls, LPS stimulation significantly increased LC3, Atg5, and Beclin-1 protein expression (P < 0.05) but decreased ZO-1, claudin-3, and occludin protein expression (P < 0.05) and increased serum DAO and D-xylose levels, effects that were all countered by ZJ617 pretreatment. LPS induced significantly higher hepatic LC3, Atg5, Beclin-1, SOD-2, and Bax protein expression (P < 0.05) and lower hepatic total bile acid (TBA) levels (P < 0.05) compared with controls. ZJ617 pretreatment significantly decreased hepatic Beclin-1, SOD2, and Bax protein expression (P < 0.05) and showed a tendency to decrease hepatic TBA (P = 0.0743) induced by LPS treatment. Pretreatment of ZJ617 before LPS injection induced the production of 5 significant metabolites in the intestinal contents: capric acid, isoleucine 1TMS, glycerol-1-phosphate byproduct, linoleic acid, alanine-alanine (P < 0.05). Conclusions These results demonstrated that ZJ617 pretreatment alleviated LPS-induced intestinal tight junction protein destruction, and intestinal and hepatic inflammatory and autophagy signal activation in the piglets. Supplementary Information The online version contains supplementary material available at 10.1186/s40104-021-00624-9.
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Affiliation(s)
- Tao Zhu
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Science, Zhejiang University, Hangzhou, 310058, China
| | - Jiangdi Mao
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Science, Zhejiang University, Hangzhou, 310058, China
| | - Yifan Zhong
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Science, Zhejiang University, Hangzhou, 310058, China
| | | | - Zhaoxi Deng
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Science, Zhejiang University, Hangzhou, 310058, China
| | - Yanjun Cui
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Science, Zhejiang University, Hangzhou, 310058, China
| | - Jianxin Liu
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Science, Zhejiang University, Hangzhou, 310058, China
| | - Haifeng Wang
- The Key Laboratory of Molecular Animal Nutrition, Ministry of Education, College of Animal Science, Zhejiang University, Hangzhou, 310058, China.
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159
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Nagata N, Hamasaki Y, Inagaki S, Nakamura T, Horikami D, Yamamoto-Hanada K, Inuzuka Y, Shimosawa T, Kobayashi K, Narita M, Ohya Y, Murata T. Urinary lipid profile of atopic dermatitis in murine model and human patients. FASEB J 2021; 35:e21949. [PMID: 34591339 DOI: 10.1096/fj.202100828r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/15/2021] [Accepted: 09/09/2021] [Indexed: 12/23/2022]
Abstract
Atopic dermatitis (AD) is the most common inflammatory skin disease in children. The serum level of thymus and activation-regulated chemokine (TARC) is a useful AD index to reflect disease severity; however, it requires blood collection from young children. In comparison, urine samples are easier to collect in a pediatric clinical setting. Here, we analyzed the lipids excreted in urine to identify a diagnostic biomarker for AD. We generated a murine dermatitis model by repeated topical application of 2,4-dinitrofluorobenzene (DNFB) or tape-stripping the dorsal skin. Lipid metabolites excreted in the urine were comprehensively analyzed using liquid chromatography-tandem mass spectrometry. To corroborate our findings, we also analyzed urine samples from patients with AD. DNFB application induced AD-like skin lesions, including epidermal thickening, infiltration of eosinophils and T cells, and an increase in Th2 cytokine levels. Assessment of lipids excreted in urine showed a dominance of prostaglandins (PGs), namely, a PGF2α metabolite (13,14-dihydro-15-keto-tetranor-PGF1α ), a PGE2 metabolite (13,14-dihydro-15-keto-tetranor-PGE2 ), and a PGD2 metabolite (13,14-dihydro-15-keto PGJ2 ). mRNA and protein expression of PGF2α , PGE2 , and PGD2 synthase was upregulated in DNFB-treated skin. The tape-stripping model also caused dermatitis but without Th2 inflammation; urine PGF2α and PGD2 metabolite levels remained unaffected. Finally, we confirmed that the urinary levels of the aforementioned PG metabolites, as well as PGI2 metabolite, 6,15-diketo-13,14-dihydro-PGF1α and arachidonic acid metabolite, 17-hydroxyeicosatetraenoic acid (17-HETE) increased in patients with AD. Our data highlights the unique urinary lipid profile in patients with AD, which may provide insight into novel urinary biomarkers for AD diagnosis.
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Affiliation(s)
- Nanae Nagata
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Yuta Hamasaki
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Shinichiro Inagaki
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Tatsuro Nakamura
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Daiki Horikami
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | | | - Yusuke Inuzuka
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Tatsuo Shimosawa
- Department of Clinical Laboratory, School of Medicine, International University of Health and Welfare, Chiba, Japan
| | - Koji Kobayashi
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Masami Narita
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Yukihiro Ohya
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Takahisa Murata
- Department of Animal Radiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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160
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Tan CY, Ramirez ZE, Surana NK. A Modern-World View of Host-Microbiota-Pathogen Interactions. THE JOURNAL OF IMMUNOLOGY 2021; 207:1710-1718. [PMID: 34544813 DOI: 10.4049/jimmunol.2100215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 05/14/2021] [Indexed: 12/14/2022]
Abstract
The microbiota-the diverse set of commensal microbes that normally colonize humans-represents the first line of defense against infectious diseases. In this review, we summarize the direct and indirect mechanisms by which the microbiota modulates susceptibility to, and severity of, infections, with a focus on immunological mechanisms. Moreover, we highlight some of the ways that modern-world lifestyles have influenced the structure-function relationship between the microbiota and infectious diseases. Ultimately, understanding how the microbiota influences infectious risks will facilitate development of microbiota-derived therapeutics that bolster host defenses.
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Affiliation(s)
- Chin Yee Tan
- Division of Infectious Diseases, Department of Pediatrics, Duke University School of Medicine, Durham, NC.,Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC; and
| | - Zeni E Ramirez
- Division of Infectious Diseases, Department of Pediatrics, Duke University School of Medicine, Durham, NC.,Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC; and
| | - Neeraj K Surana
- Division of Infectious Diseases, Department of Pediatrics, Duke University School of Medicine, Durham, NC; .,Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC; and.,Department of Immunology, Duke University School of Medicine, Durham, NC
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161
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Bock KW. Aryl hydrocarbon receptor (AHR) functions in infectious and sterile inflammation and NAD +-dependent metabolic adaptation. Arch Toxicol 2021; 95:3449-3458. [PMID: 34559251 PMCID: PMC8461142 DOI: 10.1007/s00204-021-03134-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/11/2021] [Indexed: 01/13/2023]
Abstract
Aryl hydrocarbon receptor (AHR) research has shifted from exploring dioxin toxicity to elucidation of various physiologic AHR functions. Exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) is known to exert cellular stress-mediated sterile inflammatory responses in exposed human tissues but may be lethal in sensitive species. Inflammation can be thought of as the extreme end of a spectrum ranging from homeostasis to stress responses (sterile inflammation) and to defense against infection (infectious inflammation). Defense against bacterial infection by generation of reactive oxygen species has to be strictly controlled and may use up a considerable amount of energy. NAD+-mediated energy metabolism adapts to various inflammatory responses. As examples, the present commentary tries to integrate responses of AHR and NAD+-consuming enzymes (PARP7/TiPARP, CD38 and sirtuins) into infectious and stress-induced inflammatory responses, the latter exemplified by nonalcoholic fatty liver disease (NAFLD). TCDD toxicity models in sensitive species provide hints to molecular AHR targets of energy metabolism including gluconeogenesis and glycolysis. AHR research remains challenging and promising.
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Affiliation(s)
- Karl Walter Bock
- Institute of Experimental and Clinical Pharmacology and Toxicology, Wilhelmstrasse 56, 72074, Tübingen, Germany.
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162
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Xie T, Jin F, Jia X, Mao H, Xu Y, Zhang S. High cellulose diet promotes intestinal motility through regulating intestinal immune homeostasis and serotonin biosynthesis. Biol Chem 2021; 403:279-292. [PMID: 34536342 DOI: 10.1515/hsz-2021-0216] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Accepted: 09/07/2021] [Indexed: 12/12/2022]
Abstract
It is widely accepted dietary fiber intimately linked to inflammatory and nervous diseases, which often been described with altered gastrointestinal (GI) motility. However, how dose dietary fiber modulate inflammation and crosstalk influence GI function has not been explained in detail. We found fiber-free diet reduced intestinal motility, accompanied by upregulated proinflammatory immunocytes and inflammatory cytokines in colon of mice. We also discovered high-cellulose diet increased synthesis of serotonin and expression of neurotrophic factors, both of that have been reported involved in promoting intestinal motility. In addition, metabolomics analysis showed increased tryptophan metabolites in high-cellulose diet mice, which happened to be required for serotonin biosynthesis. Further analysis revealed high-cellulose diet changed the composition of gut microbiota, in particular by altering the ratio of Firmicutes to Bacteroidetes, consequently, concentration of short-chain fatty acids (SCFAs), especially acetate. Orally administration of acetate confirmed its modulating to serotonin synthesis, neurotrophic factors expression and immunocyte differentiation through regulating histone deacetylase (HDAC3) activity in colon. Together, our results demonstrated high-cellulose diet promote intestinal motility through regulating intestinal homeostasis and enteric nervous system by increasing acetate production and HDAC3 inhibition. Thus, rich cellulose diet or acetate supplement can be considered as dietary advice to improve clinically intestinal motility insufficiency.
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Affiliation(s)
- Tao Xie
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Guangzhou510282, China
| | - Fa Jin
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Guangzhou510282, China
| | - Xiaokun Jia
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Guangzhou510282, China
| | - Hengxu Mao
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Guangzhou510282, China
| | - Yuting Xu
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Guangzhou510282, China
| | - Shizhong Zhang
- Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, The Neurosurgery Institute of Guangdong Province, Guangzhou510282, China
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163
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Gershon MD, Margolis KG. The gut, its microbiome, and the brain: connections and communications. J Clin Invest 2021; 131:143768. [PMID: 34523615 PMCID: PMC8439601 DOI: 10.1172/jci143768] [Citation(s) in RCA: 60] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Modern research on gastrointestinal behavior has revealed it to be a highly complex bidirectional process in which the gut sends signals to the brain, via spinal and vagal visceral afferent pathways, and receives sympathetic and parasympathetic inputs. Concomitantly, the enteric nervous system within the bowel, which contains intrinsic primary afferent neurons, interneurons, and motor neurons, also senses the enteric environment and controls the detailed patterns of intestinal motility and secretion. The vast microbiome that is resident within the enteric lumen is yet another contributor, not only to gut behavior, but to the bidirectional signaling process, so that the existence of a microbiota-gut-brain "connectome" has become apparent. The interaction between the microbiota, the bowel, and the brain now appears to be neither a top-down nor a bottom-up process. Instead, it is an ongoing, tripartite conversation, the outline of which is beginning to emerge and is the subject of this Review. We emphasize aspects of the exponentially increasing knowledge of the microbiota-gut-brain "connectome" and focus attention on the roles that serotonin, Toll-like receptors, and macrophages play in signaling as exemplars of potentially generalizable mechanisms.
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Affiliation(s)
| | - Kara Gross Margolis
- Department of Pediatrics, Columbia University Vagelos College of Physicians and Surgeons, New York, New York, USA
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164
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Fujiwara H. Crosstalk Between Intestinal Microbiota Derived Metabolites and Tissues in Allogeneic Hematopoietic Cell Transplantation. Front Immunol 2021; 12:703298. [PMID: 34512627 PMCID: PMC8429959 DOI: 10.3389/fimmu.2021.703298] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/09/2021] [Indexed: 12/12/2022] Open
Abstract
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an evidence based- cellular immunotherapy for hematological malignancies. Immune reactions not only promote graft-versus-tumor effects that kill hematological malignant cells but also graft-versus-host disease (GVHD) that is the primary complication characterized by systemic organ damages consisting of T-cells and antigen presenting cells (APCs) activation. GVHD has long been recognized as an immunological reaction that requires an immunosuppressive treatment targeting immune cells. However immune suppression cannot always prevent GVHD or effectively treat it once it has developed. Recent studies using high-throughput sequencing technology investigated the impact of microbial flora on GVHD and provided profound insights of the mechanism of GVHD other than immune cells. Allo-HSCT affects the intestinal microbiota and microbiome-metabolome axis that can alter intestinal homeostasis and the severity of experimental GVHD. This axis can potentially be manipulated via dietary intervention or metabolites produced by intestinal bacteria affected post-allo-HSCT. In this review, we discuss the mechanism of experimental GVHD regulation by the complex microbial community-metabolites-host tissue axis. Furthermore, we summarize the major findings of microbiome-based immunotherapeutic approaches that protect tissues from experimental GVHD. Understanding the complex relationships between gut microbiota-metabolites-host tissues axis provides crucial insight into the pathogenesis of GVHD and advances the development of new therapeutic approaches.
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Affiliation(s)
- Hideaki Fujiwara
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
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165
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Design, Synthesis, and In Vitro Evaluation of Novel Indolyl DiHydropyrazole Derivatives as Potential Anticancer Agents. Molecules 2021; 26:molecules26175235. [PMID: 34500672 PMCID: PMC8434462 DOI: 10.3390/molecules26175235] [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: 05/25/2021] [Revised: 08/11/2021] [Accepted: 08/12/2021] [Indexed: 11/17/2022] Open
Abstract
Indoles derived from both natural sources or artificial synthetic methods have been known to interact with aryl hydrocarbon receptors (AhR), and exhibit anticancer activity. In light of these attractive properties, a series of hybrid molecules with structural features of indoles, i.e., those bearing a pyrazoline nucleus, were evaluated for their enhanced anticancer activity. The designed molecules were subjected to molecular docking in order to screen for potential AhR interacting compounds, and the identified indolyl dihydropyrazole derivatives were synthesized. The synthesized compounds were characterized, and their cytotoxicity was evaluated against four human cancer cell lines using the MTT assay. Based on the Glide g-score, H-bonding interactions and bonding energy of 20 candidate molecules were selected for further analysis from the 64 initially designed molecules. These candidate molecules have shown promising anti-proliferative activity against the cell lines tested. Among these candidate molecules, the compounds with hydroxy phenyl substitution on the pyrazoline ring have shown potent activity across all the tested cell lines. The designed scaffold was proven effective for screening potential candidate molecules with anticancer properties, and may be further optimized structurally for yielding the ideal anti-tumorigenic compound for the treatment of various cancers.
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166
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Chapkin RS, Davidson LA, Park H, Jin UH, Fan YY, Cheng Y, Hensel ME, Landrock KK, Allred C, Menon R, Klemashevich C, Jayaraman A, Safe S. Role of the Aryl Hydrocarbon Receptor (AhR) in Mediating the Effects of Coffee in the Colon. Mol Nutr Food Res 2021; 65:e2100539. [PMID: 34406707 DOI: 10.1002/mnfr.202100539] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/26/2021] [Indexed: 12/14/2022]
Abstract
SCOPE This study investigates the mechanism of action and functional effects of coffee extracts in colonic cells, on intestinal stem cell growth, and inhibition of dextran sodium sulfate (DSS)-induced intestinal barrier damage in mice. METHODS AND RESULTS Aqueous coffee extracts induced Ah receptor (AhR) -responsive CYP1A1, CYP1B1, and UGT1A1 gene expression in colon-derived Caco2 and YAMC cells. Tissue-specific AhR knockout (AhRf/f x Lgr5-GFP-CreERT2 x Villin-Cre), wild-type (Lgr5-CreERT2 x Villin-Cre) mice are sources of stem cell enriched organoids and both coffee extracts and norharman, an AhR-active component of these extracts inhibited stem cell growth. Coffee extracts also inhibit DSS-induced damage to intestinal barrier function and DSS-induced mucosal inflammatory genes such as IL-6 and TGF-β1 in wild-type (AhR+/+ ) but not AhR-/- mice. In contrast, coffee does not exhibit protective effects in intestinal-specific AhR knockout mice. Coffee extracts also enhanced overall formation of AhR-active microbial metabolites. CONCLUSIONS In colon-derived cells and in the mouse intestine, coffee induced several AhR-dependent responses including gene expression, inhibition of intestinal stem cell-enriched organoid growth, and inhibition of DSS-induced intestinal barrier damage. We conclude that the anti-inflammatory effects of coffee in the intestine are due, in part, to activation of AhR signaling.
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Affiliation(s)
- Robert S Chapkin
- Departments of Nutrition and Biochemistry & Biophysics Texas A&M University, College Station, TX, 77843, USA
| | - Laurie A Davidson
- Departments of Nutrition and Biochemistry & Biophysics Texas A&M University, College Station, TX, 77843, USA
| | - Hyejin Park
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX, 77843, USA
| | - Un-Ho Jin
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX, 77843, USA
| | - Yang-Yi Fan
- Departments of Nutrition and Biochemistry & Biophysics Texas A&M University, College Station, TX, 77843, USA
| | - Yating Cheng
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX, 77843, USA
| | - Martha E Hensel
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX, 77843, USA
| | - Kerstin K Landrock
- Departments of Nutrition and Biochemistry & Biophysics Texas A&M University, College Station, TX, 77843, USA
| | - Clinton Allred
- Departments of Nutrition and Biochemistry & Biophysics Texas A&M University, College Station, TX, 77843, USA
| | - Rani Menon
- Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Cory Klemashevich
- Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Arul Jayaraman
- Department of Chemical Engineering, Texas A&M University, College Station, TX, 77843, USA
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX, 77843, USA
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167
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Krkoška M, Svobodová J, Kabátková M, Zapletal O, Hyršlová Vaculová A, Nekvindová J, Vondráček J. Deregulation of signaling pathways controlling cell survival and proliferation in cancer cells alters induction of cytochrome P450 family 1 enzymes. Toxicology 2021; 461:152897. [PMID: 34403729 DOI: 10.1016/j.tox.2021.152897] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 07/28/2021] [Accepted: 08/12/2021] [Indexed: 02/07/2023]
Abstract
Cytochrome P450 family 1 (CYP1) enzymes contribute both to metabolism of xenobiotics and to the control of endogenous levels of ligands of the aryl hydrocarbon receptor (AhR). Their activities, similar to other CYPs, can be altered in tumor tissues. Here, we examined a possible role of proliferative/survival pathways signaling, which is often deregulated in tumor cells, and possible links with p300 histone acetyltransferase (a transcriptional co-activator) in the control of CYP1 expression, focusing particularly on CYP1A1. Using cell models derived from human liver, we observed that the induction of CYP1A1 expression, as well as other CYP1 enzymes, was reduced in exponentially growing cells, as compared with their non-dividing counterparts. The siRNA-mediated inhibition of proliferation/pro-survival signaling pathway effectors (such as β-catenin and/or Hippo pathway effectors YAP/TAZ) increased the AhR ligand-induced CYP1A1 mRNA levels in liver HepaRG cells, and/or in colon carcinoma HCT-116 cells. The activation of proliferative Wnt/β-catenin signaling in HCT-116 cells reduced both the induction of CYP1 enzymes and the binding of p300 to the promoter of CYP1A1 or CYP1B1 genes. These results seem to indicate that aberrant proliferative signaling in tumor cells could suppress induction of CYP1A1 (or other CYP1 enzymes) via competition for p300 binding. This mechanism could be involved in modulation of the metabolism of both endogenous and exogenous substrates of CYP1A1 (and other CYP1 enzymes), with possible further consequences for alterations of the AhR signaling in tumor cells, or additional functional roles of CYP1 enzymes.
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Affiliation(s)
- Martin Krkoška
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Jana Svobodová
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic
| | - Markéta Kabátková
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic
| | - Ondřej Zapletal
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic
| | - Alena Hyršlová Vaculová
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic
| | - Jana Nekvindová
- Institute of Clinical Biochemistry and Diagnostics, University Hospital Hradec Králové, Sokolská 581, 500 05 Hradec Králové, Czech Republic
| | - Jan Vondráček
- Department of Cytokinetics, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 61265 Brno, Czech Republic.
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168
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Lin LP, Liu D, Qian JC, Wu L, Zhao Q, Tan RX. Post-ingestion conversion of dietary indoles into anticancer agents. Natl Sci Rev 2021; 9:nwab144. [PMID: 35505660 PMCID: PMC9053945 DOI: 10.1093/nsr/nwab144] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 05/03/2021] [Accepted: 07/08/2021] [Indexed: 11/12/2022] Open
Abstract
There are health benefits from consuming cruciferous vegetables that release indole-3-carbinol (I3C), but the in vivo transformation of I3C-related indoles remains underinvestigated. Here we detail the post-ingestion conversion of I3C into antitumor agents, 2-(indol-3-ylmethyl)-3,3′-diindolylmethane (LTr1) and 3,3′-diindolylmethane (DIM), by conceptualizing and materializing the reaction flux derailing (RFD) approach as a means of unraveling these stepwise transformations to be non-enzymatic but pH-dependent and gut microbe-sensitive. In the upper (or acidic) gastrointestinal tract, LTr1 is generated through Michael addition of 3-methyleneindolium (3MI, derived in situ from I3C) to DIM produced from I3C via the formaldehyde-releasing (major) and CO2-liberating (minor) pathways. In the large intestine, ‘endogenous’ I3C and DIM can form, respectively, from couplings of formaldehyde with one and two molecules of indole (a tryptophan catabolite). Acid-producing gut bacteria such as Lactobacillus acidophilus facilitate the H+-promotable steps. This work updates our understanding of the merits of I3C consumption and identifies LTr1 as a drug candidate.
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Affiliation(s)
- Li Ping Lin
- State Key Laboratory of Pharmaceutical Biotechnology, Institute of Functional Biomolecules, Nanjing University, Nanjing 210023, China
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Dan Liu
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Jia Cheng Qian
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Liang Wu
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
| | - Quan Zhao
- State Key Laboratory of Pharmaceutical Biotechnology, Institute of Functional Biomolecules, Nanjing University, Nanjing 210023, China
| | - Ren Xiang Tan
- State Key Laboratory of Pharmaceutical Biotechnology, Institute of Functional Biomolecules, Nanjing University, Nanjing 210023, China
- State Key Laboratory Cultivation Base for TCM Quality and Efficacy, Nanjing University of Chinese Medicine, Nanjing 210023, China
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169
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Tang JS, Cait A, Li Y, Abolins-Thompson H, Gell K, Herst PM, O'Sullivan D, Gasser O. Practical Approach To Explore the Effects of Polyphenols on Aryl Hydrocarbon Receptor Regulated Immune Function. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:8625-8633. [PMID: 34338516 DOI: 10.1021/acs.jafc.1c02095] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The ligand-activated aryl hydrocarbon receptor (AhR) is an important molecular regulator of immune function, whose activity can be modulated by dietary glucosinolate- and tryptophan-derived metabolites. In contrast, the potential use of polyphenols as dietary regulators of AhR-dependent immunity remains unclear. In this perspective, we discuss how cellular metabolism may alter the net effect of polyphenols on AhR, thus potentially reconciling some of the conflicting observations reported in the literature. We further provide a methodological roadmap, across the fields of immunology, metabolomics, and gut microbial ecology, to explore the potential effects of polyphenol-rich diets on AhR-regulated immune function in humans.
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Affiliation(s)
- Jeffry S Tang
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
- High-Value Nutrition National Science Challenge, Auckland 1023, New Zealand
| | - Alissa Cait
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
| | - Yanyan Li
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
- High-Value Nutrition National Science Challenge, Auckland 1023, New Zealand
| | - Helena Abolins-Thompson
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
- High-Value Nutrition National Science Challenge, Auckland 1023, New Zealand
| | - Katie Gell
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
| | - Patries M Herst
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
- Department of Radiation Therapy, University of Otago, Wellington 6021, New Zealand
| | - David O'Sullivan
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
- High-Value Nutrition National Science Challenge, Auckland 1023, New Zealand
| | - Olivier Gasser
- Malaghan Institute of Medical Research, Post Office Box 7060, Wellington 6242, New Zealand
- High-Value Nutrition National Science Challenge, Auckland 1023, New Zealand
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170
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Pernomian L, Duarte-Silva M, de Barros Cardoso CR. The Aryl Hydrocarbon Receptor (AHR) as a Potential Target for the Control of Intestinal Inflammation: Insights from an Immune and Bacteria Sensor Receptor. Clin Rev Allergy Immunol 2021; 59:382-390. [PMID: 32279195 DOI: 10.1007/s12016-020-08789-3] [Citation(s) in RCA: 111] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The aryl hydrocarbon receptor (AHR) is widely expressed in immune and non-immune cells of the gut and its activation has been correlated to the outcome of inflammatory bowel diseases (IBD). In ulcerative colitis and Crohn's disease, there is an excessive chronic inflammation with massive accumulation of leukocytes in the gut, in an attempt to constrain the invasion of pathogenic microorganisms on the damaged organ. Accordingly, it is known that dietary components, xenobiotics, and some chemicals or metabolites can activate AHR and induce the modulation of inflammatory responses. In fact, the AHR triggering by specific ligands during inflammatory conditions results in decreased IFNγ, IL-6, IL-12, TNF, IL-7, and IL-17, along with reduced microbial translocation and fibrosis in the gut. Moreover, upon AHR activation, there are increased regulatory mechanisms such as IL-10, IL-22, prostaglandin E2, and Foxp3, besides the production of anti-microbial peptides and epithelial repair. Most interestingly, commensal bacteria or their metabolites may also activate this receptor, thus contributing to the restoration of gut normobiosis and homeostasis. In line with that, Lactobacillus reuteri, Lactobacillus bulgaricus, or microbial products such as tryptophan metabolites, indole-3-pyruvic acid, urolithin A, short-chain fatty acids, dihydroxyquinoline, and others may regulate the inflammation by mechanisms dependent on AHR activation. Hence, here we discussed the potential modulatory role of AHR on intestinal inflammation, focused on the reestablishment of homeostasis through the receptor triggering by microbial metabolites. Finally, the development of AHR-based therapies derived from bacteria products could represent an important future alternative for controlling IBD.
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Affiliation(s)
- Larissa Pernomian
- Department of Clinical Analysis, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Murillo Duarte-Silva
- Department of Biochemistry and Immunology, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Cristina Ribeiro de Barros Cardoso
- Department of Clinical Analysis, Toxicology and Food Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil.
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171
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Berthold DL, Jones KDJ, Udalova IA. Regional specialization of macrophages along the gastrointestinal tract. Trends Immunol 2021; 42:795-806. [PMID: 34373208 DOI: 10.1016/j.it.2021.07.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 07/12/2021] [Accepted: 07/14/2021] [Indexed: 12/15/2022]
Abstract
The tissue microenvironment is a major driver in imprinting tissue-specific macrophage functions in various mammalian tissues. As monocytes are recruited into the gastrointestinal (GI) tract at steady state and inflammation, they rapidly adopt a tissue-specific and distinct transcriptome. However, the GI tract varies significantly along its length, yet most studies of intestinal macrophages do not directly compare the phenotype and function of these macrophages in the small and large intestine, thus leading to disparities in data interpretations. This review highlights differences along the GI tract that are likely to influence macrophage function, with a specific focus on diet and microbiota. This analysis may fuel further investigation regarding the interplay between the intestinal immune system and GI tissue microenvironments, ideally providing unique therapeutic targets to modulate specific intestinal macrophage populations and/or functions.
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Affiliation(s)
| | - Kelsey D J Jones
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK; Gastroenterology Department, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
| | - Irina A Udalova
- Kennedy Institute of Rheumatology, University of Oxford, Oxford, UK.
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172
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Pappolla MA, Perry G, Fang X, Zagorski M, Sambamurti K, Poeggeler B. Indoles as essential mediators in the gut-brain axis. Their role in Alzheimer's disease. Neurobiol Dis 2021; 156:105403. [PMID: 34087380 DOI: 10.1016/j.nbd.2021.105403] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 05/05/2021] [Accepted: 05/21/2021] [Indexed: 02/07/2023] Open
Abstract
Sporadic late-onset Alzheimer's disease (AD) is the most frequent cause of dementia associated with aging. Due to the progressive aging of the population, AD is becoming a healthcare burden of unprecedented proportions. Twenty years ago, it was reported that some indole molecules produced by the gut microbiota possess essential biological activities, including neuroprotection and antioxidant properties. Since then, research has cemented additional characteristics of these substances, including anti-inflammatory, immunoregulatory, and amyloid anti-aggregation features. Herein, we summarize the evidence supporting an integrated hypothesis that some of these substances can influence the age of onset and progression of AD and are central to the symbiotic relationship between intestinal microbes and the brain. Studies have shown that some of these substances' activities result from interactions with biologically conserved pathways and with genetic risk factors for AD. By targeting multiple pathologic mechanisms simultaneously, certain indoles may be excellent candidates to ameliorate neurodegeneration. We propose that management of the microbiota to induce a higher production of neuroprotective indoles (e.g., indole propionic acid) will promote brain health during aging. This area of research represents a new therapeutic paradigm that could add functional years of life to individuals who would otherwise develop dementia.
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Affiliation(s)
- Miguel A Pappolla
- University of Texas Medical Branch, Department of Neurology, Galveston, TX, United States of America.
| | - George Perry
- University of Texas at San Antonio, Department of Biology, San Antonio, TX, United States of America
| | - Xiang Fang
- University of Texas Medical Branch, Department of Neurology, Galveston, TX, United States of America
| | - Michael Zagorski
- Case Western Reserve University, Department of Chemistry, Cleveland, United States of America
| | - Kumar Sambamurti
- Medical University of South Carolina, Department of Neurobiology, Charleston, SC, United States of America
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173
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Stockinger B, Shah K, Wincent E. AHR in the intestinal microenvironment: safeguarding barrier function. Nat Rev Gastroenterol Hepatol 2021; 18:559-570. [PMID: 33742166 PMCID: PMC7611426 DOI: 10.1038/s41575-021-00430-8] [Citation(s) in RCA: 148] [Impact Index Per Article: 49.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/09/2021] [Indexed: 02/01/2023]
Abstract
Mammalian aryl hydrocarbon receptor (AHR) is a ligand-dependent transcription factor that belongs to the basic helix-loop-helix (bHLH)-PAS family of transcription factors, which are evolutionarily conserved environmental sensors. In the absence of ligands, AHR resides in the cytoplasm in a complex with molecular chaperones such as HSP90, XAP2 and p23. Upon ligand binding, AHR translocates into the nuclear compartment, where it dimerizes with its partner protein, AHR nuclear translocator (ARNT), an obligatory partner for the DNA-binding and functional activity. Historically, AHR had mostly been considered as a key intermediary for the detrimental effects of environmental pollutants on the body. However, following the discovery of AHR-mediated functions in various immune cells, as well as the emergence of non-toxic 'natural' AHR ligands, this view slowly began to change, and the study of AHR-deficient mice revealed a plethora of important beneficial functions linked to AHR activation. This Review focuses on regulation of the AHR pathway and the barrier-protective roles AHR has in haematopoietic, as well as non-haematopoietic, cells within the intestinal microenvironment. It covers the nature of AHR ligands and feedback regulation of the AHR pathway, outlining the currently known physiological functions in immune, epithelial, endothelial and neuronal cells of the intestine.
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Affiliation(s)
| | | | - Emma Wincent
- Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
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Zhao C, Hu X, Bao L, Wu K, Feng L, Qiu M, Hao H, Fu Y, Zhang N. Aryl hydrocarbon receptor activation by Lactobacillus reuteri tryptophan metabolism alleviates Escherichia coli-induced mastitis in mice. PLoS Pathog 2021; 17:e1009774. [PMID: 34297785 PMCID: PMC8336809 DOI: 10.1371/journal.ppat.1009774] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 08/04/2021] [Accepted: 06/30/2021] [Indexed: 12/25/2022] Open
Abstract
The intestinal microbiota has been associated with the occurrence and development of mastitis, which is one of the most serious diseases of lactating women and female animals, but the underlying mechanism has not yet been elucidated. Aryl hydrocarbon receptor (AhR) activation by microbiota tryptophan metabolism-derived ligands is involved in maintaining host homeostasis and resisting diseases. We investigated whether AhR activation by microbiota-metabolic ligands could influence mastitis development in mice. In this study, we found that AhR activation using Ficz ameliorated mastitis symptoms, which were related to limiting NF-κB activation and enhancing barrier function. Impaired AhR activation by disturbing the intestinal microbiota initiated mastitis, and processed Escherichia coli (E. coli)-induced mastitis in mice. Supplementation with dietary tryptophan attenuated the mastitis, but attenuation was inhibited by the intestinal microbiota abrogation, while administering tryptophan metabolites including IAld and indole but not IPA, rescued the tryptophan effects in dysbiotic mice. Supplementation with a Lactobacillus reuteri (L. reuteri) strain with the capacity to produce AhR ligands also improved E. coli-induced mastitis in an AhR-dependent manner. These findings provide evidence for novel therapeutic strategies for treating mastitis, and support the role of metabolites derived from the intestinal microbiota in improving distal disease. Mastitis, a common disease for female during lactation period that could cause a health risk for humans or huge economic losses for animals, is caused by pathogen invasion. However, little is known about how host factors affect mastitis’ progression and outcome. Our previous study found that disrupting the intestinal microbiota exacerbated pathogen-induced mastitis, but the underlying mechanism is unclear. Host cell surface receptors recognize intestinal microbiota-metabolized ligands to mediate downstream signal transduction is the primary manner for microbiota-host interactions. In this study, we determined microbiota-mediated aryl hydrocarbon receptor (AhR) activation alleviated E. coli-induced mastitis in mice. Insufficient AhR ligands production by disrupting the intestinal microbiota contributed to mastitis progression, but compensation host with dietary tryptophan, AhR ligands or probiotic Lactobacillus reuteri protected mice from E. coli-induced mastitis by rescuing AhR activation. Our founding provides direct evidence for a potential strategy for treating mastitis and as a basis for targeting microbiota-host interaction for diseases intervention.
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Affiliation(s)
- Caijun Zhao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xiaoyu Hu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Lijuan Bao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Keyi Wu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Lianjun Feng
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Min Qiu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Haoyang Hao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
| | - Yunhe Fu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
- * E-mail:
| | - Naisheng Zhang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Jilin University, Changchun, China
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Cirac A, Tsaktanis T, Beyer T, Linnerbauer M, Andlauer T, Grummel V, Nirschl L, Loesslein L, Quintana FJ, Hemmer B, Rothhammer V. The Aryl Hydrocarbon Receptor-Dependent TGF-α/VEGF-B Ratio Correlates With Disease Subtype and Prognosis in Multiple Sclerosis. NEUROLOGY-NEUROIMMUNOLOGY & NEUROINFLAMMATION 2021; 8:8/5/e1043. [PMID: 34301821 PMCID: PMC8312279 DOI: 10.1212/nxi.0000000000001043] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 05/28/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVE To evaluate the aryl hydrocarbon receptor (AHR)-dependent transforming growth factor alpha (TGF-α)/vascular endothelial growth factor B (VEGF-B) ratio, which regulates the effects of metabolic, dietary, and microbial factors on acute and chronic CNS inflammation, as a potential marker in multiple sclerosis (MS). METHODS TGF-α, VEGF-B, and AHR agonistic activity were determined in serum of 252 patients with relapsing-remitting (RR) MS, primary and secondary progressive MS, as well as during active disease (clinically isolated syndrome [CIS] and RRMS relapse). RESULTS The TGF-α/VEGF-B ratio and AHR agonistic activity were decreased in all MS subgroups with a stable disease course as compared to controls. During active CNS inflammation in CIS and RRMS relapse, the TGF-α/VEGF-B ratio and AHR agonistic activity were increased. Conversely, in patients with minimal clinical impairment despite long-standing disease, the TGF-α/VEGF-B ratio and AHR agonistic activity were unaltered. Finally, the TGF-α/VEGF-B ratio and AHR agonistic activity correlated with neurologic impairment and time to conversion from CIS to MS. CONCLUSIONS The AHR-dependent TGF-α/VEGF-B ratio is altered in a subtype, severity, and disease activity-specific manner and correlates with time to conversion from CIS to MS. It may thus represent a novel marker and serve as additive guideline for immunomodulatory strategies in MS. CLASSIFICATION OF EVIDENCE This study provides Class III evidence that serum levels of AHR, TGF-α, and VEGF-B distinguish subtypes of MS and predict the severity and disease activity of MS.
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Affiliation(s)
- Ana Cirac
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Thanos Tsaktanis
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Tobias Beyer
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Mathias Linnerbauer
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Till Andlauer
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Verena Grummel
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Lucy Nirschl
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Lena Loesslein
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Francisco J Quintana
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Bernhard Hemmer
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany
| | - Veit Rothhammer
- From the Department of Neurology (A.C., T.T., T.B., M.L., T.A., V.G., L.N., B.H., V.R.), Klinikum Rechts der Isar, Technical University of Munich Department of Neurology (T.T., M.L., L.L., V.R.), University Hospital Erlangen, Friedrich Alexander University Erlangen-Nuernberg, Germany; Ann Romney Center for Neurologic Diseases (F.J.Q.), Brigham and Women's Hospital, Harvard Medical School, Boston; Broad Institute of MIT and Harvard (F.J.Q.), Cambridge, MA; and Munich Cluster for Systems Neurology (SyNergy) (B.H.), Germany.
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176
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Stockinger B. T cell subsets and environmental factors in Citrobacter rodentium infection. Curr Opin Microbiol 2021; 63:92-97. [PMID: 34298480 DOI: 10.1016/j.mib.2021.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/25/2021] [Accepted: 06/29/2021] [Indexed: 10/20/2022]
Abstract
Infection with Citrobacter rodentium constitutes an attack on the intestinal barrier and results in concerted action by innate and adaptive immune responses to limit bacterial translocation and destroy those bacteria that have breached the intestinal barrier. Among the many immune cell types that are involved in the defence against this infection, Th17 cells as the major producers of the barrier protective cytokine IL-22 during the adaptive phase of the response are most numerous. Their extensive plasticity furthermore results in the production of additional cytokines that previously were ascribed to Th1 cells, such as IFNγ. The timely and coordinated repair of damaged epithelium requires input from environmental factors derived from diet and microbiota metabolism of tryptophan which are transmitted through the aryl hydrocarbon receptor (AHR). Thus, the combination of a robust immune response, coupled with intestinal stem cell differentiation guided by environmental factors, ensures resistance to barrier destruction by intestinal infection.
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177
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Puccetti M, Pariano M, Renga G, Santarelli I, D’Onofrio F, Bellet MM, Stincardini C, Bartoli A, Costantini C, Romani L, Ricci M, Giovagnoli S. Targeted Drug Delivery Technologies Potentiate the Overall Therapeutic Efficacy of an Indole Derivative in a Mouse Cystic Fibrosis Setting. Cells 2021; 10:1601. [PMID: 34202407 PMCID: PMC8305708 DOI: 10.3390/cells10071601] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/21/2021] [Accepted: 06/23/2021] [Indexed: 12/16/2022] Open
Abstract
Inflammation plays a major role in the pathophysiology of cystic fibrosis (CF), a multisystem disease. Anti-inflammatory therapies are, therefore, of interest in CF, provided that the inhibition of inflammation does not compromise the ability to fight pathogens. Here, we assess whether indole-3-aldehyde (3-IAld), a ligand of the aryl hydrocarbon receptor (AhR), may encompass such an activity. We resorted to biopharmaceutical technologies in order to deliver 3-IAld directly into the lung, via dry powder inhalation, or into the gut, via enteric microparticles, in murine models of CF infection and inflammation. We found the site-specific delivery of 3-IAld to be an efficient strategy to restore immune and microbial homeostasis in CF organs, and mitigate lung and gut inflammatory pathology in response to fungal infections, in the relative absence of local and systemic inflammatory toxicity. Thus, enhanced delivery to target organs of AhR agonists, such as 3-IAld, may pave the way for the development of safe and effective anti-inflammatory agents in CF.
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Affiliation(s)
- Matteo Puccetti
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy;
| | - Marilena Pariano
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Giorgia Renga
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Ilaria Santarelli
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Fiorella D’Onofrio
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Marina M. Bellet
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Claudia Stincardini
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Andrea Bartoli
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Claudio Costantini
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Luigina Romani
- Department of Medicine and Surgery, University of Perugia, 06132 Perugia, Italy; (M.P.); (G.R.); (I.S.); (F.D.); (M.M.B.); (C.S.); (A.B.); (C.C.); (L.R.)
| | - Maurizio Ricci
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy;
| | - Stefano Giovagnoli
- Department of Pharmaceutical Sciences, University of Perugia, 06123 Perugia, Italy;
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178
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Lamas B, Hernandez-Galan L, Galipeau HJ, Constante M, Clarizio A, Jury J, Breyner NM, Caminero A, Rueda G, Hayes CL, McCarville JL, Bermudez Brito M, Planchais J, Rolhion N, Murray JA, Langella P, Loonen LMP, Wells JM, Bercik P, Sokol H, Verdu EF. Aryl hydrocarbon receptor ligand production by the gut microbiota is decreased in celiac disease leading to intestinal inflammation. Sci Transl Med 2021; 12:12/566/eaba0624. [PMID: 33087499 DOI: 10.1126/scitranslmed.aba0624] [Citation(s) in RCA: 94] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 02/24/2020] [Accepted: 06/02/2020] [Indexed: 12/15/2022]
Abstract
Metabolism of tryptophan by the gut microbiota into derivatives that activate the aryl hydrocarbon receptor (AhR) contributes to intestinal homeostasis. Many chronic inflammatory conditions, including celiac disease involving a loss of tolerance to dietary gluten, are influenced by cues from the gut microbiota. We investigated whether AhR ligand production by the gut microbiota could influence gluten immunopathology in nonobese diabetic (NOD) mice expressing DQ8, a celiac disease susceptibility gene. NOD/DQ8 mice, exposed or not exposed to gluten, were subjected to three interventions directed at enhancing AhR pathway activation. These included a high-tryptophan diet, gavage with Lactobacillus reuteri that produces AhR ligands or treatment with an AhR agonist. We investigated intestinal permeability, gut microbiota composition determined by 16S rRNA gene sequencing, AhR pathway activation in intestinal contents, and small intestinal pathology and inflammatory markers. In NOD/DQ8 mice, a high-tryptophan diet modulated gut microbiota composition and enhanced AhR ligand production. AhR pathway activation by an enriched tryptophan diet, treatment with the AhR ligand producer L. reuteri, or pharmacological stimulation using 6-formylindolo (3,2-b) carbazole (Ficz) decreased immunopathology in NOD/DQ8 mice exposed to gluten. We then determined AhR ligand production by the fecal microbiota and AhR activation in patients with active celiac disease compared to nonceliac control individuals. Patients with active celiac disease demonstrated reduced AhR ligand production and lower intestinal AhR pathway activation. These results highlight gut microbiota-dependent modulation of the AhR pathway in celiac disease and suggest a new therapeutic strategy for treating this disorder.
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Affiliation(s)
- Bruno Lamas
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Leticia Hernandez-Galan
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Heather J Galipeau
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Marco Constante
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Alexandra Clarizio
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Jennifer Jury
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Natalia M Breyner
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Alberto Caminero
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Gaston Rueda
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Christina L Hayes
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Justin L McCarville
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Miriam Bermudez Brito
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Julien Planchais
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Nathalie Rolhion
- Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, AP-HP, Hôpital Saint Antoine, Service de Gastroenterologie, F-75012 Paris, France
| | - Joseph A Murray
- Division of Gastroenterology and Hepatology, Department of Immunology, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Philippe Langella
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France
| | - Linda M P Loonen
- Host-Microbe Interactomics, Animal Sciences Group, Wageningen University, Wageningen, Netherlands
| | - Jerry M Wells
- Host-Microbe Interactomics, Animal Sciences Group, Wageningen University, Wageningen, Netherlands
| | - Premysl Bercik
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Harry Sokol
- Université Paris-Saclay, INRAE, AgroParisTech, Micalis Institute, 78350, Jouy-en-Josas, France. .,Sorbonne Université, Inserm, Centre de Recherche Saint-Antoine, CRSA, AP-HP, Hôpital Saint Antoine, Service de Gastroenterologie, F-75012 Paris, France
| | - Elena F Verdu
- Farncombe Family Digestive Health Research Institute, Department of Medicine, McMaster University, Hamilton, Ontario, Canada.
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van den Bogaard EH, Esser C, Perdew GH. The aryl hydrocarbon receptor at the forefront of host-microbe interactions in the skin: A perspective on current knowledge gaps and directions for future research and therapeutic applications. Exp Dermatol 2021; 30:1477-1483. [PMID: 34105853 PMCID: PMC8518783 DOI: 10.1111/exd.14409] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/11/2021] [Accepted: 05/22/2021] [Indexed: 02/06/2023]
Abstract
The skin is home to a community of skin microbiota including bacteria, viruses and fungi, which are widely accepted to be of importance for skin homeostasis but also associated with skin diseases. Detailed knowledge on the skin microbiota composition and its changes in a number of skin diseases is available. Yet, specific interactions between microbes and the host skin cells or how they communicate with each other are less well understood. To identify, understand and eventually therapeutically exploit causal relationships of microbial dysbiosis with disease, studies are required that address the receptors and mediators involved in host‐microbe interactions. In this perspective article, we provide an outlook on one of such receptors, namely the aryl hydrocarbon receptor (AHR). The AHR is well known for being a ligand‐activated transcription factor regulating the proliferation, differentiation and function of many cell types present in the skin. Its targeting by anti‐inflammatory therapeutics such as coal tar and Tapinarof is effective in atopic dermatitis and psoriasis. AHR signalling is activated upon binding of wide variety of small chemicals or ligands, including microbiota‐derived metabolites. New evidence has emerged pointing towards a key role for epidermal AHR signalling through skin microbiota‐derived metabolites. In response, AHR‐driven expression of antimicrobial peptides and stratum corneum formation may alter the skin microbiota composition. This a self‐perpetuating feedback loop calls for novel therapeutic intervention strategies for which we herein discuss the requirements in future mechanistic studies.
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Affiliation(s)
- Ellen H van den Bogaard
- Department of Dermatology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Nijmegen, The Netherlands
| | - Charlotte Esser
- IUF-Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany
| | - Gary H Perdew
- Department of Veterinary and Biomedical Sciences, Center for Molecular Toxicology and Carcinogenesis, The Pennsylvania State University, University Park, PA, USA
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180
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Grifka-Walk HM, Jenkins BR, Kominsky DJ. Amino Acid Trp: The Far Out Impacts of Host and Commensal Tryptophan Metabolism. Front Immunol 2021; 12:653208. [PMID: 34149693 PMCID: PMC8213022 DOI: 10.3389/fimmu.2021.653208] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 05/11/2021] [Indexed: 12/12/2022] Open
Abstract
Tryptophan (Trp) is an essential amino acid primarily derived from the diet for use by the host for protein synthesis. The intestinal tract is lined with cells, both host and microbial, that uptake and metabolize Trp to also generate important signaling molecules. Serotonin (5-HT), kynurenine and its downstream metabolites, and to a lesser extent other neurotransmitters are generated by the host to signal onto host receptors and elicit physiological effects. 5-HT production by neurons in the CNS regulates sleep, mood, and appetite; 5-HT production in the intestinal tract by enterochromaffin cells regulates gastric motility and inflammation in the periphery. Kynurenine can signal onto the aryl hydrocarbon receptor (AHR) to elicit pleiotropic responses from several cell types including epithelial and immune cells, or can be further metabolized into bioactive molecules to influence neurodegenerative disease. There is a remarkable amount of cross-talk with the microbiome with regard to tryptophan metabolites as well. The gut microbiome can regulate the production of host tryptophan metabolites and can use dietary or recycled trp to generate bioactive metabolites themselves. Trp derivatives like indole are able to signal onto xenobiotic receptors, including AHR, to elicit tolerogenic effects. Here, we review studies that demonstrate that tryptophan represents a key intra-kingdom signaling molecule.
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Affiliation(s)
- Heather M Grifka-Walk
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Brittany R Jenkins
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
| | - Douglas J Kominsky
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, United States
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181
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Dagenais-Lussier X, Loucif H, Beji C, Telittchenko R, Routy JP, van Grevenynghe J. Latest developments in tryptophan metabolism: Understanding its role in B cell immunity. Cytokine Growth Factor Rev 2021; 59:111-117. [DOI: 10.1016/j.cytogfr.2021.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Revised: 02/20/2021] [Accepted: 02/22/2021] [Indexed: 12/12/2022]
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182
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Loos SAM, Hermann S, Klapp SHL. Medium Entropy Reduction and Instability in Stochastic Systems with Distributed Delay. ENTROPY (BASEL, SWITZERLAND) 2021; 23:696. [PMID: 34073091 PMCID: PMC8229647 DOI: 10.3390/e23060696] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 05/20/2021] [Accepted: 05/26/2021] [Indexed: 11/17/2022]
Abstract
Many natural and artificial systems are subject to some sort of delay, which can be in the form of a single discrete delay or distributed over a range of times. Here, we discuss the impact of this distribution on (thermo-)dynamical properties of time-delayed stochastic systems. To this end, we study a simple classical model with white and colored noise, and focus on the class of Gamma-distributed delays which includes a variety of distinct delay distributions typical for feedback experiments and biological systems. A physical application is a colloid subject to time-delayed feedback control, which is, in principle, experimentally realizable by co-moving optical traps. We uncover several unexpected phenomena in regard to the system's linear stability and its thermodynamic properties. First, increasing the mean delay time can destabilize or stabilize the process, depending on the distribution of the delay. Second, for all considered distributions, the heat dissipated by the controlled system (e.g., the colloidal particle) can become negative, which implies that the delay force extracts energy and entropy of the bath. As we show here, this refrigerating effect is particularly pronounced for exponential delay. For a specific non-reciprocal realization of a control device, we find that the entropic costs, measured by the total entropy production of the system plus controller, are the lowest for exponential delay. The exponential delay further yields the largest stable parameter regions. In this sense, exponential delay represents the most effective and robust type of delayed feedback.
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Affiliation(s)
- Sarah A. M. Loos
- Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany;
- ICTP—The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34151 Trieste, Italy
- Institut für Theoretische Physik, Universität Leipzig, Brüderstraße 15, 04103 Leipzig, Germany
| | - Simon Hermann
- Institut für Physik, Humboldt-Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany;
| | - Sabine H. L. Klapp
- Institut für Theoretische Physik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany;
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183
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Yadetie F, Brun NR, Vieweg I, Nahrgang J, Karlsen OA, Goksøyr A. Transcriptome responses in polar cod (Boreogadus saida) liver slice culture exposed to benzo[a]pyrene and ethynylestradiol: insights into anti-estrogenic effects. Toxicol In Vitro 2021; 75:105193. [PMID: 34015484 DOI: 10.1016/j.tiv.2021.105193] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/10/2021] [Accepted: 05/13/2021] [Indexed: 10/21/2022]
Abstract
Polar cod (Boreogadus saida) is a key species in the arctic marine ecosystem vulnerable to effects of pollution, particularly from petroleum related activities. To facilitate studying the effects of those pollutants, we adapted a precision-cut liver slice culture protocol for this species. Using this system on board a research vessel, we studied gene expression in liver slice after exposure to the polycyclic aromatic hydrocarbon (PAH) benzo[a]pyrene (BaP), ethynylestradiol (EE2), and their mixtures, to map their molecular targets and examine possible anti-estrogenic effects of BaP. The exposure experiments were performed with BaP alone (0.1, 1, and 10 μM) or in combination with low concentrations of EE2 (5 nM) to mimic physiological estradiol levels in early vitellogenic female fish. Transcriptome analysis (RNA-seq) was performed after 72 h exposure in culture to map the genes and cellular pathways affected. The results provide a view of global transcriptome responses to BaP and EE2, which resulted in enrichment of many pathways such as the aryl hydrocarbon (Ahr) and estrogen receptor pathways. In the mixture exposure, BaP resulted in anti-estrogenic effects, shown by attenuation of EE2 activated transcription of many estrogen target genes. The results from this ex vivo experiment suggest that pollutants that activate the Ahr pathway such as the PAH compound BaP can result in anti-estrogenic effects that may lead to endocrine disruption in polar cod.
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Affiliation(s)
- Fekadu Yadetie
- Department of Biological Sciences, University of Bergen, Bergen, Norway.
| | - Nadja R Brun
- Department of Biological Sciences, University of Bergen, Bergen, Norway; Biology Department, Woods Hole Oceanographic Institution, Woods Hole, MA, USA.
| | - Ireen Vieweg
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway.
| | - Jasmine Nahrgang
- Department of Arctic and Marine Biology, UiT The Arctic University of Norway, Tromsø, Norway.
| | - Odd André Karlsen
- Department of Biological Sciences, University of Bergen, Bergen, Norway.
| | - Anders Goksøyr
- Department of Biological Sciences, University of Bergen, Bergen, Norway.
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184
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Khan S, Luck H, Winer S, Winer DA. Emerging concepts in intestinal immune control of obesity-related metabolic disease. Nat Commun 2021; 12:2598. [PMID: 33972511 PMCID: PMC8110751 DOI: 10.1038/s41467-021-22727-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Accepted: 03/22/2021] [Indexed: 12/19/2022] Open
Abstract
The intestinal immune system is an important modulator of glucose homeostasis and obesity-associated insulin resistance. Dietary factors, the intestinal microbiota and their metabolites shape intestinal immunity during obesity. The intestinal immune system in turn affects processes such as intestinal permeability, immune cell trafficking, and intestinal hormone availability, impacting systemic insulin resistance. Understanding these pathways might identify mechanisms underlying treatments for insulin resistance, such as metformin and bariatric surgery, or aid in developing new therapies and vaccination approaches. Here, we highlight evolving concepts centered on intestinal immunity, diet, and the microbiota to provide a working model of obesity-related metabolic disease.
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Affiliation(s)
- Saad Khan
- Department of Immunology, University of Toronto, Toronto, ON, Canada
- Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON, Canada
| | - Helen Luck
- Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON, Canada
| | - Shawn Winer
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
- Department of Laboratory Medicine, St. Michael's Hospital, Toronto, ON, Canada
| | - Daniel A Winer
- Department of Immunology, University of Toronto, Toronto, ON, Canada.
- Division of Cellular & Molecular Biology, Diabetes Research Group, Toronto General Hospital Research Institute (TGHRI), University Health Network, Toronto, ON, Canada.
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada.
- Department of Pathology, University Health Network, Toronto, ON, Canada.
- Buck Institute for Research on Aging, Novato, CA, USA.
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185
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Shi Z, Ohno H, Satoh-Takayama N. Dietary Derived Micronutrients Modulate Immune Responses Through Innate Lymphoid Cells. Front Immunol 2021; 12:670632. [PMID: 33995407 PMCID: PMC8116705 DOI: 10.3389/fimmu.2021.670632] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 04/06/2021] [Indexed: 12/12/2022] Open
Abstract
Innate lymphoid cells (ILCs) are a group of innate immune cells that possess overlapping features with T cells, although they lack antigen-specific receptors. ILCs consist of five subsets-ILC1, ILC2, ILC3, lymphoid tissue inducer (LTi-like) cells, and natural killer (NK) cells. They have significant functions in mediating various immune responses, protecting mucosal barrier integrity and maintaining tissue homeostasis in the lung, skin, intestines, and liver. ILCs react immediately to signals from internal and external sources. Emerging evidence has revealed that dietary micronutrients, such as various vitamins and minerals can significantly modulate immune responses through ILCs and subsequently affect human health. It has been demonstrated that micronutrients control the development and proliferation of different types of ILCs. They are also potent immunoregulators in several autoimmune diseases and play vital roles in resolving local inflammation. Here, we summarize the interplay between several essential micronutrients and ILCs to maintain epithelial barrier functions in various mucosal tissues and discuss their limitations and potentials for promoting human health.
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Affiliation(s)
- Zhengzheng Shi
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.,Laboratory for Immune Regulation, Graduate School of Medical and Pharmaceutical Sciences, Chiba University, Chiba, Japan
| | - Hiroshi Ohno
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.,Laboratory for Immune Regulation, Graduate School of Medical and Pharmaceutical Sciences, Chiba University, Chiba, Japan.,Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University, Yokohama, Japan.,Intestinal Microbiota Project, Kanagawa Institute of Industrial Science and Technology, Kawasaki, Japan
| | - Naoko Satoh-Takayama
- Laboratory for Intestinal Ecosystem, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.,Immunobiology Laboratory, Graduate School of Medical Life Science, Yokohama City University, Yokohama, Japan
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186
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Nolan LS, Mihi B, Agrawal P, Gong Q, Rimer JM, Bidani SS, Gale SE, Goree M, Hu E, Lanik WE, Huang E, Bando JK, Liu V, Lewis AN, Bustos A, Hodzic Z, Laury ML, Good M. Indole-3-Carbinol-Dependent Aryl Hydrocarbon Receptor Signaling Attenuates the Inflammatory Response in Experimental Necrotizing Enterocolitis. Immunohorizons 2021; 5:193-209. [PMID: 33906960 PMCID: PMC8173979 DOI: 10.4049/immunohorizons.2100018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 03/01/2021] [Indexed: 01/10/2023] Open
Abstract
Necrotizing enterocolitis (NEC) causes significant morbidity and mortality in premature infants; therefore, the identification of therapeutic and preventative strategies against NEC remains a high priority. The ligand-dependent transcription factor aryl hydrocarbon receptor (AhR) is well known to contribute to the regulation of intestinal microbial communities and amelioration of intestinal inflammation. However, the role of AhR signaling in NEC is unclear. Experimental NEC was induced in 4-d-old wild-type mice or mice lacking AhR expression in the intestinal epithelial cells or AhR expression in CD11c+ cells (AhRΔCD11c) by subjecting animals to twice daily hypoxic stress and gavage feeding with formula supplemented with LPS and enteric bacteria. During NEC, compared with wild-type mice treated with vehicle, littermates treated with an AhR proligand, indole-3-carbinol, had reduced expression of Il1b and Marco, a scavenger receptor that mediates dendritic cell activation and the recognition and clearance of bacterial pathogens by macrophages. Furthermore, indole-3-carbinol treatment led to the downregulation of genes involved in cytokine and chemokine, as revealed by pathway enrichment analysis. AhR expression in the intestinal epithelial cells and their cre-negative mouse littermates were similarly susceptible to experimental NEC, whereas AhRΔCD11c mice with NEC exhibited heightened inflammatory responses compared with their cre-negative mouse littermates. In seeking to determine the mechanisms involved in this increased inflammatory response, we identified the Tim-4- monocyte-dependent subset of macrophages as increased in AhRΔCD11c mice compared with their cre-negative littermates. Taken together, these findings demonstrate the potential for AhR ligands as a novel immunotherapeutic approach to the management of this devastating disease.
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Affiliation(s)
- Lila S Nolan
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Belgacem Mihi
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | | | - Qingqing Gong
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Jamie M Rimer
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Shay S Bidani
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Sarah E Gale
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Martin Goree
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Elise Hu
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Wyatt E Lanik
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Elizabeth Huang
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Jennifer K Bando
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO
| | - Victoria Liu
- Washington University in St. Louis, St. Louis, MO
| | - Angela N Lewis
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO
| | - Aiza Bustos
- Washington University in St. Louis, St. Louis, MO
| | - Zerina Hodzic
- Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA; and
| | - Marie L Laury
- Genome Technology Access Center, McDonnell Genome Institute, Washington University School of Medicine, St. Louis, MO
| | - Misty Good
- Division of Newborn Medicine, Washington University School of Medicine, St. Louis, MO;
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187
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Hoffmann JP, Kolls JK, McCombs JE. Regulation and Function of ILC3s in Pulmonary Infections. Front Immunol 2021; 12:672523. [PMID: 33968082 PMCID: PMC8102726 DOI: 10.3389/fimmu.2021.672523] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 04/07/2021] [Indexed: 12/12/2022] Open
Abstract
Lower respiratory infections are among the leading causes of morbidity and mortality worldwide. These potentially deadly infections are further exacerbated due to the growing incidence of antimicrobial resistance. To combat these infections there is a need to better understand immune mechanisms that promote microbial clearance. This need in the context of lung infections has been further heightened with the emergence of SARS-CoV-2. Group 3 innate lymphoid cells (ILC3s) are a recently discovered tissue resident innate immune cell found at mucosal sites that respond rapidly in the event of an infection. ILC3s have clear roles in regulating mucosal immunity and tissue homeostasis in the intestine, though the immunological functions in lungs remain unclear. It has been demonstrated in both viral and bacterial pneumonia that stimulated ILC3s secrete the cytokines IL-17 and IL-22 to promote both microbial clearance as well as tissue repair. In this review, we will evaluate regulation of ILC3s during inflammation and discuss recent studies that examine ILC3 function in the context of both bacterial and viral pulmonary infections.
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Affiliation(s)
| | | | - Janet E. McCombs
- Center for Translational Research in Infection & Inflammation, Department of Medicine, Tulane University School of Medicine, New Orleans, LA, United States
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188
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The role of mucosal barriers in human gut health. Arch Pharm Res 2021; 44:325-341. [PMID: 33890250 DOI: 10.1007/s12272-021-01327-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 03/26/2021] [Indexed: 12/15/2022]
Abstract
The intestinal mucosa is continuously exposed to a large number of commensal or pathogenic microbiota and foreign food antigens. The intestinal epithelium forms a dynamic physicochemical barrier to maintain immune homeostasis. To efficiently absorb nutrients from food, the epithelium in the small intestine has thin, permeable layers spread over a vast surface area. Epithelial cells are renewed from the crypt toward the villi, accompanying epithelial cell death and shedding, to control bacterial colonization. Tight junction and adherens junction proteins provide epithelial cell-cell integrity. Microbial signals are recognized by epithelial cells via toll-like receptors. Environmental signals from short-chain fatty acids derived from commensal microbiota metabolites, aryl hydrocarbon receptors, and hypoxia-induced factors fortify gut barrier function. Here we summarize recent findings regarding various environmental factors for gut barrier function. Further, we discuss the role of gut barriers in the pathogenesis of human intestinal disease and the challenges of therapeutic strategies targeting gut barrier restoration.
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189
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Lu X, Lin Y, Qiu X, Liu J, Zhu T, Araujo JA, Zhang J, Zhu Y. Metabolomic Changes after Subacute Exposure to Polycyclic Aromatic Hydrocarbons: A Natural Experiment among Healthy Travelers from Los Angeles to Beijing. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:5097-5105. [PMID: 33683876 DOI: 10.1021/acs.est.0c07627] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Emerging epidemiological evidence has associated exposure to polycyclic aromatic hydrocarbons (PAHs) with chronic diseases including cardiometabolic diseases and neurodegeneration. However, little information is available about their subacute effects, which may accumulate over years and contribute to chronic disease development. To fill this knowledge gap, we designed a natural experiment among 26 healthy young adults who were exposed to elevated PAHs for 10 weeks after traveling from Los Angeles to Beijing in 2014 and 2015. Serum was collected before, during, and after the trip for metabolomics analysis. We identified 50 metabolites that significantly changed 6-8 weeks after the travel to Beijing (FDR < 5%). The network analysis revealed two main independent modules. Module 1 was allocated to oxidative homeostasis-related response and module 2 to delayed enzymatic deinduction response. Remarkably, the module 1 metabolites were recovered 4-7 weeks after participants' return, while the module 2 metabolites were not. Urinary hydroxylated PAHs were significantly associated with metabolites from both modules, while PAH carboxylic acids, likely metabolites of alkylated PAHs, were only associated with antioxidation-related metabolites. These results suggested differential subacute effects of unsubstituted and alkylated PAHs. Further studies are warranted to elucidate the role of the reversibility of metabolite changes in adverse health effects of PAHs.
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Affiliation(s)
- Xinchen Lu
- State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, P. R. China
| | - Yan Lin
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California Los Angeles, Los Angeles, California 90095, United States
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California 90095, United States
| | - Xinghua Qiu
- State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, P. R. China
| | - Jinming Liu
- State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, P. R. China
| | - Tong Zhu
- State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, P. R. China
| | - Jesus A Araujo
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California Los Angeles, Los Angeles, California 90095, United States
- Division of Cardiology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles, Los Angeles, California 90095, United States
| | - Junfeng Zhang
- State Key Joint Laboratory for Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, and Center for Environment and Health, Peking University, Beijing 100871, P. R. China
- Nicholas School of the Environment and Global Health Institute, Duke University, Durham, North Carolina 27708, United States
| | - Yifang Zhu
- Department of Environmental Health Sciences, Jonathan and Karin Fielding School of Public Health, University of California Los Angeles, Los Angeles, California 90095, United States
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190
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Drug Discovery Inspired from Nuclear Receptor Sensing of Microbial Signals. Trends Mol Med 2021; 27:624-626. [PMID: 33865719 DOI: 10.1016/j.molmed.2021.03.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 03/04/2021] [Accepted: 03/16/2021] [Indexed: 01/07/2023]
Abstract
Host-microbiota interactions are vital for diverse pathophysiological events and may be targeted for innovative therapeutics. Nuclear receptors (NRs) are versatile host sensors of microbial signals that coordinate diverse environmental cues with local and remote adaptions. Harnessing NR-mediated sensory machinery could provide an alternative lynchpin for gut microbiota-oriented drug discovery strategy.
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191
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Margolis KG, Cryan JF, Mayer EA. The Microbiota-Gut-Brain Axis: From Motility to Mood. Gastroenterology 2021; 160:1486-1501. [PMID: 33493503 PMCID: PMC8634751 DOI: 10.1053/j.gastro.2020.10.066] [Citation(s) in RCA: 327] [Impact Index Per Article: 109.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/07/2020] [Accepted: 10/15/2020] [Indexed: 02/06/2023]
Abstract
The gut-brain axis plays an important role in maintaining homeostasis. Many intrinsic and extrinsic factors influence signaling along this axis, modulating the function of both the enteric and central nervous systems. More recently the role of the microbiome as an important factor in modulating gut-brain signaling has emerged and the concept of a microbiota-gut-brain axis has been established. In this review, we highlight the role of this axis in modulating enteric and central nervous system function and how this may impact disorders such as irritable bowel syndrome and disorders of mood and affect. We examine the overlapping biological constructs that underpin these disorders with a special emphasis on the neurotransmitter serotonin, which plays a key role in both the gastrointestinal tract and in the brain. Overall, it is clear that although animal studies have shown much promise, more progress is necessary before these findings can be translated for diagnostic and therapeutic benefit in patient populations.
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Affiliation(s)
- Kara G. Margolis
- Department of Pediatrics, Morgan Stanley Children’s Hospital, Columbia University Irving Medical Center, New York, NY,Corresponding author:
| | - John F. Cryan
- Department of Anatomy & Neuroscience, University College Cork, Ireland, APC Microbiome Ireland, University College Cork, Ireland
| | - Emeran A. Mayer
- G. Oppenheimer Center for Neurobiology of Stress and Resilience, Vachte and Tamar Manoukian Division of Digestive Diseases, David Geffen School of Medicine at UCLA, Los Angeles, California
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192
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Jia Y, Guo J, Zhao Y, Zhang Z, Shi L, Fang Y, Wu D, Wu L, Chang C. AHR signaling pathway reshapes the metabolism of AML/MDS cells and potentially leads to cytarabine resistance. Acta Biochim Biophys Sin (Shanghai) 2021; 53:492-500. [PMID: 33709099 DOI: 10.1093/abbs/gmab017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Indexed: 01/08/2023] Open
Abstract
Emerging evidence suggests that aryl hydrocarbon receptor (AHR) promotes the initiation, invasion, progression, and metastasis of cancer cells. However, its effects in patients with myelodysplastic syndrome/acute myeloid leukemia (MDS/AML) remain undefined. In this study, we aimed to investigate the effects of AHR activation on malignant cells in patients with MDS/AML. We found that AHR was expressed aberrantly in patients with MDS/AML. Further studies demonstrated that inhibiting AHR decreased the mitochondrial dehydrogenase content and the mitochondrial membrane potential (MMP) in MDS/AML cells. Activating AHR with L-kynurenine (Kyn) increased AHR expression, which was accompanied by an increase in mitochondrial dehydrogenase content and MMP in MDS/AML cells. Moreover, the expression level of mitochondria-associated mitochondrial transcription factor A was increased after activating AHR with L-Kyn when compared with that in the control group but decreased after inhibiting the AHR signal. Activating AHR in MDS/AML cells enhanced the resistance to cytarabine. These findings indicated that activating the AHR signaling pathway reshaped the metabolism in MDS/AML cells, thus contributing to the resistance to cytarabine.
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Affiliation(s)
- Yan Jia
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Juan Guo
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Youshan Zhao
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Zheng Zhang
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Lei Shi
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Ying Fang
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Dong Wu
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Lingyun Wu
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Chunkang Chang
- Department of Hematology, Shanghai Jiao Tong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
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193
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Rao Z, Li J, Shi B, Zeng Y, Liu Y, Sun Z, Wu L, Sun W, Tang Z. Dietary Tryptophan Levels Impact Growth Performance and Intestinal Microbial Ecology in Weaned Piglets via Tryptophan Metabolites and Intestinal Antimicrobial Peptides. Animals (Basel) 2021; 11:817. [PMID: 33799457 PMCID: PMC7999158 DOI: 10.3390/ani11030817] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/09/2021] [Accepted: 03/12/2021] [Indexed: 12/29/2022] Open
Abstract
Tryptophan (Trp) plays an important role in piglet growth. However, the effect of dietary Trp on microbial flora is still poorly understood. A total of 40 28-d weaned piglets were allocated to four groups with 10 barrows per group and one pig per replicate. Piglets were fed a corn and soybean meal-based diet with 0.14%, 0.21%, 0.28%, or 0.35% Trp for four weeks. Five piglets from each diet group were euthanized, and blood and tissue samples were collected. The average daily body weight gain, average daily feed intake, feed conversion ratio, spleen index, pancreas index, longissimus dorsi muscle index, plasma insulin, 5-hydroxytryptamine, kynurenine, and Trp concentrations of weaned piglets increased in a dose-dependent manner (p < 0.05). Compared with the 0.14% Trp diet, the adequate-Trp diets (0.21%, 0.28%, or 0.35%) down-regulated the relative abundances of 12 genera including Turicibacter, Prevotella, Mitsuokella, Anaerovibrio, Megasphaera, Succinivibrio, Sutterella, Desulfovibrio, and Methanobrevibacter (p < 0.05); up-regulated the abundances of Ruminococcaceae, Lactobacillus, and Muribaculaceae in the colon (p < 0.05); and augmented the mRNA level and concentration of porcine β-defensin 2 in the small intestinal mucosa (p < 0.05). Moreover, Trp-adequate diets increased the abundances of Trp hydroxylase, indoleamine 2,3-dioxygenase, porcine β-defensin 2, phosphorylated mammalian target of rapamycin, and phosphorylated protein kinase B in the small intestinal mucosa (p < 0.05). We noted that a corn and soybean meal-based diet with 0.35% Trp may be a nutritional strategy to improve growth performance, intestinal mucosal barrier integrity, and intestinal microbial ecology in weaned piglets.
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Affiliation(s)
- Zebin Rao
- Laboratory for Bio-Feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (Z.R.); (J.L.); (B.S.); (Z.S.); (L.W.); (W.S.)
| | - Jinlong Li
- Laboratory for Bio-Feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (Z.R.); (J.L.); (B.S.); (Z.S.); (L.W.); (W.S.)
| | - Baoshi Shi
- Laboratory for Bio-Feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (Z.R.); (J.L.); (B.S.); (Z.S.); (L.W.); (W.S.)
| | - Yan Zeng
- Hunan Institute of Microbiology, Changsha 410009, China; (Y.Z.); (Y.L.)
| | - Yubo Liu
- Hunan Institute of Microbiology, Changsha 410009, China; (Y.Z.); (Y.L.)
| | - Zhihong Sun
- Laboratory for Bio-Feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (Z.R.); (J.L.); (B.S.); (Z.S.); (L.W.); (W.S.)
| | - Liuting Wu
- Laboratory for Bio-Feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (Z.R.); (J.L.); (B.S.); (Z.S.); (L.W.); (W.S.)
| | - Weizhong Sun
- Laboratory for Bio-Feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (Z.R.); (J.L.); (B.S.); (Z.S.); (L.W.); (W.S.)
| | - Zhiru Tang
- Laboratory for Bio-Feed and Molecular Nutrition, College of Animal Science and Technology, Southwest University, Chongqing 400715, China; (Z.R.); (J.L.); (B.S.); (Z.S.); (L.W.); (W.S.)
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194
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Wang J, Su S, Pender C, Murugesan R, Syed B, Kim WK. Effect of a Phytogenic Feed Additive on Growth Performance, Nutrient Digestion, and Immune Response in Broiler-Fed Diets with Two Different Levels of Crude Protein. Animals (Basel) 2021; 11:ani11030775. [PMID: 33799557 PMCID: PMC7999929 DOI: 10.3390/ani11030775] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 03/05/2021] [Accepted: 03/08/2021] [Indexed: 12/22/2022] Open
Abstract
Simple Summary The rising concerns on antibiotics resistance from using antibiotics in animal production has resulted in an increase in researches on antibiotic alternatives. A phytogenic feed additive from a blend of extracts of oregano, cinnamon, citrus peel, and fructooligosaccharides was evaluated in the present study. The objective of the present study is not only to evaluate the effect of phytogenic feed additive on broiler performance, but also to explore the potential mode of actions through immune response, digestive enzyme activities, nutrient transporter gene expressions and nutrient digestibility. Supplementation of phytogenic feed additives improved broiler FCR through stimulating ileum immunity. Abstract The aim of this experiment was to evaluate the effect of a phytogenic feed additive (PFA) on growth performance and nutrient digestibility of broilers fed corn and soybean meal-based diets containing two different levels of crude protein. A 2 × 2 completely randomized factorial arrangement (eight replicates/treatment, 30 birds/replicate) was conducted with a positive control (PC) and negative control (NC) containing crude protein at standard or reduced by 1.5% (equivalent to a reduction of 15 g/kg), respectively, and supplementation of PFA at 0 or 125 ppm of diet. There were no significant interactions found between PFA and CP levels in the current study. Main effect analysis showed that during 0–42 d of age NC diets decreased body weight gain (p < 0.05), but increased feed intake (p < 0.05) and feed conversion ratio (FCR, p < 0.01), whereas supplementation of PFA resulted in a lower FCR (p < 0.01). The ileal nutrient digestibility was reduced (p < 0.05) in the broilers fed a reduced protein diet at 21 d compared to the standard protein level group, but there were no effects for PFA levels. Similarly, supplementing PFAs showed no effects on digestive enzyme (Alkaline phosphatase, amylase, and lipase) activity in jejunal digesta and jejunal brush border enzyme (maltase, sucrase, and aminopeptidase) activity. Supplementation of PFA downregulated (p < 0.05) the mRNA expressions of cytochrome P450 1A and interleukin 6 in the ileum but had no effects on nutrient transporter genes in the jejunum. In conclusion, supplementation of PFA reduced broiler FCR during the whole grow-out period and positively regulated the immune responses in the ileum.
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Affiliation(s)
- Jinquan Wang
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA; (J.W.); (S.S.)
| | - Shengchen Su
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA; (J.W.); (S.S.)
| | - Chasity Pender
- BIOMIN America Inc., Overland Park, KS 66210, USA; (C.P.); (R.M.)
| | - Raj Murugesan
- BIOMIN America Inc., Overland Park, KS 66210, USA; (C.P.); (R.M.)
- BIOMIN Holding GmbH, 3130 Getzersdorf, Austria;
| | | | - Woo Kyun Kim
- Department of Poultry Science, University of Georgia, Athens, GA 30602, USA; (J.W.); (S.S.)
- Correspondence:
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195
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Abstract
Exposed surfaces of mammals are colonized with 100 trillion indigenous bacteria, fungi, and viruses, creating a diverse ecosystem known as the human microbiome. The gut microbiome is the richest microbiome and is now known to regulate postnatal skeletal development and the activity of the major endocrine regulators of bone. Parathyroid hormone (PTH) is one of the bone-regulating hormone that requires elements of the gut microbiome to exert both its bone catabolic and its bone anabolic effects. How the gut microbiome regulates the skeletal response to PTH is object of intense research. Involved mechanisms include absorption and diffusion of bacterial metabolites, such as short-chain fatty acids, and trafficking of immune cells from the gut to the bone marrow. This review will focus on how the gut microbiome communicates and regulates bone marrow cells in order to modulate the skeletal effects of PTH.
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Affiliation(s)
- Roberto Pacifici
- Division of Endocrinology, Metabolism and Lipids, Department of Medicine, Emory University, Atlanta, GA, USA
- Emory Microbiome Research Center, Emory University, Atlanta, GA, USA
- Immunology and Molecular Pathogenesis Program, Emory University, Atlanta, GA, USA
- Correspondence: Roberto Pacifici, M.D., Division of Endocrinology, Metabolism and Lipids, Emory University School of Medicine, 101 Woodruff Circle, Room 1309, Atlanta, GA 30322, USA.
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196
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Qayed M, Michonneau D, Socié G, Waller EK. Indole derivatives, microbiome and graft versus host disease. Curr Opin Immunol 2021; 70:40-47. [PMID: 33647539 PMCID: PMC8466652 DOI: 10.1016/j.coi.2021.02.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 02/05/2021] [Accepted: 02/08/2021] [Indexed: 02/07/2023]
Abstract
Graft versus host disease is a life-threatening complication following allogeneic hematopoietic stem cell transplantation driven by donor T cells reacting against disparate host antigens. Immune homeostasis within the gut plays a major role in the graft versus host response. Gut microbiota and its metabolites impact gut integrity, inflammation and immune activation within the gut. This review will focus on the role of indoles, a product of microbiota metabolism, on gut homeostasis and our current understanding on how that modulates graft versus host disease.
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Affiliation(s)
- Muna Qayed
- Winship Cancer Institute, Emory University, Atlanta, Georgia, USA
- Children’s Healthcare of Atlanta, Atlanta, Georgia, USA
- Corresponding author: Edmund K. Waller MD, PhD, FACP, Professor of Medicine and Oncology, Winship Cancer Institute Emory University, Atlanta, Georgia 30322; Phone 404-727-4995; Fax 404-778-5530
| | - David Michonneau
- Hematology Transplantation, Saint Louis Hospital, 1 avenue Claude Vellefaux, 75010 Paris, France
- Université de Paris, INSERM U976, F-75010 Paris, France
| | - Gerard Socié
- Hematology Transplantation, Saint Louis Hospital, 1 avenue Claude Vellefaux, 75010 Paris, France
- Université de Paris, INSERM U976, F-75010 Paris, France
| | - Edmund K. Waller
- Winship Cancer Institute, Emory University, Atlanta, Georgia, USA
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197
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Li X, Zhang ZH, Zabed HM, Yun J, Zhang G, Qi X. An Insight into the Roles of Dietary Tryptophan and Its Metabolites in Intestinal Inflammation and Inflammatory Bowel Disease. Mol Nutr Food Res 2021; 65:e2000461. [PMID: 33216452 DOI: 10.1002/mnfr.202000461] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 10/14/2020] [Indexed: 12/11/2022]
Abstract
Inflammatory bowel disease (IBD) is complex, chronic, and relapsing gastrointestinal inflammatory disorders, which includes mainly two conditions, namely ulcerative colitis (UC) and Crohn's disease (CD). Development of IBD in any individual is closely related to his/her autoimmune regulation, gene-microbiota interactions, and dietary factors. Dietary tryptophan (Trp) is an essential amino acid for intestinal mucosal cells, and it is associated with the intestinal inflammation, epithelial barrier, and energy homeostasis of the host. According to recent studies, Trp and its three major metabolic pathways, namely kynurenine (KYN) pathway, indole pathway, and 5-hydroxytryptamine (5-HT) pathway, have vital roles in the regulation of intestinal inflammation by acting directly or indirectly on the pro/anti-inflammatory cytokines, functions of various immune cells, as well as the intestinal microbial composition and homeostasis. In this review, recent advances in Trp- and its metabolites-associated intestinal inflammation are summarized. It further discusses the complex mechanisms and interrelationships of the three major metabolic pathways of Trp in regulating inflammation, which could elucidate the value of dietary Trp to be used as a nutrient for IBD patients.
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Affiliation(s)
- Xiaolan Li
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Zhi-Hong Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Hossain M Zabed
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Junhua Yun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Guoyan Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
| | - Xianghui Qi
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
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198
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Lu P, Yamaguchi Y, Fulton WB, Wang S, Zhou Q, Jia H, Kovler ML, Salazar AG, Sampah M, Prindle T, Wipf P, Sodhi CP, Hackam DJ. Maternal aryl hydrocarbon receptor activation protects newborns against necrotizing enterocolitis. Nat Commun 2021; 12:1042. [PMID: 33589625 PMCID: PMC7884836 DOI: 10.1038/s41467-021-21356-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 01/25/2021] [Indexed: 02/07/2023] Open
Abstract
Necrotizing enterocolitis (NEC) is a disease of premature infants characterized by acute intestinal necrosis. Current dogma suggests that NEC develops in response to post-natal dietary and bacterial factors, and so a potential role for in utero factors in NEC remains unexplored. We now show that during pregnancy, administration of a diet rich in the aryl hydrocarbon receptor (AHR) ligand indole-3-carbinole (I3C), or of breast milk, activates AHR and prevents NEC in newborn mice by reducing Toll-like receptor 4 (TLR4) signaling in the newborn gut. Protection from NEC requires activation of AHR in the intestinal epithelium which is reduced in mouse and human NEC, and is independent of leukocyte activation. Finally, we identify an AHR ligand ("A18") that limits TLR4 signaling in mouse and human intestine, and prevents NEC in mice when administered during pregnancy. In summary, AHR signaling is critical in NEC development, and maternally-delivered, AHR-based therapies may alleviate NEC.
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MESH Headings
- Animals
- Animals, Newborn
- Basic Helix-Loop-Helix Transcription Factors/agonists
- Basic Helix-Loop-Helix Transcription Factors/genetics
- Basic Helix-Loop-Helix Transcription Factors/immunology
- Cytochrome P-450 CYP1A1/genetics
- Cytochrome P-450 CYP1A1/immunology
- Diet/methods
- Disease Models, Animal
- Enterocolitis, Necrotizing/genetics
- Enterocolitis, Necrotizing/immunology
- Enterocolitis, Necrotizing/pathology
- Enterocolitis, Necrotizing/prevention & control
- Female
- Gene Expression Regulation
- Humans
- Indoles/administration & dosage
- Infant, Newborn
- Infant, Premature
- Intestinal Mucosa/drug effects
- Intestinal Mucosa/immunology
- Intestinal Mucosa/pathology
- Ligands
- Maternal Exposure
- Mice
- Milk, Human/physiology
- Pregnancy
- Receptors, Aryl Hydrocarbon/agonists
- Receptors, Aryl Hydrocarbon/genetics
- Receptors, Aryl Hydrocarbon/immunology
- Signal Transduction
- Swine
- Toll-Like Receptor 4/genetics
- Toll-Like Receptor 4/immunology
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Affiliation(s)
- Peng Lu
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA.
| | - Yukihiro Yamaguchi
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - William B Fulton
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Sanxia Wang
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Qinjie Zhou
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Hongpeng Jia
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Mark L Kovler
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Andres Gonzalez Salazar
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Maame Sampah
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Thomas Prindle
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, USA
| | - Chhinder P Sodhi
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA
| | - David J Hackam
- Division of Pediatric Surgery, Johns Hopkins University School of Medicine and the Johns Hopkins Children's Center, Baltimore, MD, USA.
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199
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Trajectory Shifts in Interdisciplinary Research of the Aryl Hydrocarbon Receptor-A Personal Perspective on Thymus and Skin. Int J Mol Sci 2021; 22:ijms22041844. [PMID: 33673338 PMCID: PMC7918350 DOI: 10.3390/ijms22041844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 02/08/2021] [Accepted: 02/10/2021] [Indexed: 12/13/2022] Open
Abstract
Identifying historical trajectories is a useful exercise in research, as it helps clarify important, perhaps even “paradigmatic”, shifts in thinking and moving forward in science. In this review, the development of research regarding the role of the transcription factor “aryl hydrocarbon receptor” (AHR) as a mediator of the toxicity of environmental pollution towards a link between the environment and a healthy adaptive response of the immune system and the skin is discussed. From this fascinating development, the opportunities for targeting the AHR in the therapy of many diseases become clear.
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200
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Zhao X, Li X, Wang S, Yang Z, Liu H, Xu S. Cadmium exposure induces mitochondrial pathway apoptosis in swine myocardium through xenobiotic receptors-mediated CYP450s activation. J Inorg Biochem 2021; 217:111361. [PMID: 33581611 DOI: 10.1016/j.jinorgbio.2021.111361] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 01/12/2021] [Accepted: 01/16/2021] [Indexed: 12/20/2022]
Abstract
Cadmium (Cd) pollution has become an important public and environmental health issue. Xenobiotic receptors (XRs, aryl hydrocarbon receptor, AHR; constitutive androstane receptor, CAR; pregnane X receptor, PXR) modulate downstream cytochrome P450 enzymes (CYP450s) expression to metabolize xenobiotics and environmental contaminants. However, the underlying mechanisms of cardiotoxicity induced by Cd(II) in swine and the roles of XRs and CYP450s remain poorly understood. In this study, the cardiotoxicity of Cd(II) was investigated by establishing a Cd(II)-exposed swine model (CdCl2, 20 mg Cd/Kg diet). Terminal-deoxynucleotidyl transferase mediated nick end labeling (TUNEL) assay and transmission electron microscope were used to observe the apoptosis. Antioxidant capacity was evaluated by free radicals contents and antioxidant enzymes activities. RT-PCR and western blot were used to measure the expression of XRs, CYP450s and apoptosis-related genes. Our results revealed that Cd(II) exposure activated the XRs and increased the CYP450s expression, contributing to the production of reactive oxygen species (ROS). Cd(II) exposure restrained the antioxidant capacity, causing oxidative stress. Moreover, mitogen-activated protein kinase (MAPK) pathway including c-Jun N-terminal kinase (JNK), extracellular signal-regulated kinase (ERK) and P38 mitogen-activated protein kinase (P38) was activated, triggering the mitochondrial apoptotic pathway. In brief, we concluded that Cd(II) caused mitochondrial pathway apoptosis in swine myocardium via the oxidative stress-MAPK pathway, and XRs-mediated CYP450s expression might participate in this process through promoting the ROS.
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Affiliation(s)
- Xia Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Xiaojing Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Shengchen Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Zijiang Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China
| | - Honggui Liu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China.
| | - Shiwen Xu
- College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, China.
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