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Zhang X, Zhang F, Li Y, Fan N, Zhao K, Zhang A, Kang J, Lin Y, Xue X, Jiang X. Blockade of PI3K/AKT signaling pathway by Astragaloside IV attenuates ulcerative colitis via improving the intestinal epithelial barrier. J Transl Med 2024; 22:406. [PMID: 38689349 PMCID: PMC11061986 DOI: 10.1186/s12967-024-05168-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 04/05/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND The specific pathogenesis of UC is still unclear, but it has been clear that defects in intestinal barrier function play an important role in it. There is a temporary lack of specific drugs for clinical treatment. Astragaloside IV (AS-IV) is one of the main active ingredients extracted from Astragalus root and is a common Chinese herbal medicine for the treatment of gastrointestinal diseases. This study aimed to determine whether AS-IV has therapeutic value for DSS or LPS-induced intestinal epithelial barrier dysfunction in vivo and in vitro and its potential molecular mechanisms. METHODS The intestinal tissues from UC patients and colitis mice were collected, intestinal inflammation was observed by colonoscopy, and mucosal barrier function was measured by immunofluorescence staining. PI3K/AKT signaling pathway activator YS-49 and inhibitor LY-29 were administered to colitic mice to uncover the effect of this pathway on gut mucosal barrier modulation. Then, network pharmacology was used to screen Astragaloside IV (AS-IV), a core active component of the traditional Chinese medicine Astragalus membranaceus. The potential of AS-IV for intestinal barrier function repairment and UC treatment through blockade of the PI3K/AKT pathway was further confirmed by histopathological staining, FITC-dextran, transmission electron microscopy, ELISA, immunofluorescence, qRT-PCR, and western blotting. Finally, 16 S rRNA sequencing was performed to uncover whether AS-IV can ameliorate UC by regulating gut microbiota homeostasis. RESULTS Mucosal barrier function was significantly damaged in UC patients and murine colitis, and the activated PI3K/AKT signaling pathway was extensively involved. Both in vivo and vitro showed that the AS-IV-treated group significantly relieved inflammation and improved intestinal epithelial permeability by inhibiting the activation of the PI3K/AKT signaling pathway. In addition, microbiome data found that gut microbiota participates in AS-IV-mediated intestinal barrier recovery as well. CONCLUSIONS Our study highlights that AS-IV exerts a protective effect on the integrality of the mucosal barrier in UC based on the PI3K/AKT pathway, and AS-IV may serve as a novel AKT inhibitor to provide a potential therapy for UC.
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Affiliation(s)
- Xinhui Zhang
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xinsi Road, Baqiao District, 710038, Xi'an, Shaanxi, China
- The Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, The Ministry of Education, College of Life Sciences, Shaanxi Normal University, 620 West Chang'an Avenue, Chang 'a District, 710119, Xi'an, Shaanxi, China
| | - Fan Zhang
- Medical College, Yan'an University, 580 ShengDi Road, Baota District, 716099, Yan'an, Shaanxi, China
| | - Yan Li
- The Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, The Ministry of Education, College of Life Sciences, Shaanxi Normal University, 620 West Chang'an Avenue, Chang 'a District, 710119, Xi'an, Shaanxi, China
| | - Na Fan
- Medical College, Yan'an University, 580 ShengDi Road, Baota District, 716099, Yan'an, Shaanxi, China
| | - Ke Zhao
- The Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, The Ministry of Education, College of Life Sciences, Shaanxi Normal University, 620 West Chang'an Avenue, Chang 'a District, 710119, Xi'an, Shaanxi, China
- Department of Nutrition and Health, China Agriculture University, 100091, Beijing, China
| | - Anding Zhang
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xinsi Road, Baqiao District, 710038, Xi'an, Shaanxi, China
| | - Jiefang Kang
- The Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, The Ministry of Education, College of Life Sciences, Shaanxi Normal University, 620 West Chang'an Avenue, Chang 'a District, 710119, Xi'an, Shaanxi, China
| | - Yan Lin
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xinsi Road, Baqiao District, 710038, Xi'an, Shaanxi, China
| | - Xiaochang Xue
- The Key Laboratory of Medicinal Resources and Natural Pharmaceutical Chemistry, The Ministry of Education, College of Life Sciences, Shaanxi Normal University, 620 West Chang'an Avenue, Chang 'a District, 710119, Xi'an, Shaanxi, China.
| | - Xun Jiang
- Department of Pediatrics, Tangdu Hospital, Air Force Medical University, Xinsi Road, Baqiao District, 710038, Xi'an, Shaanxi, China.
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Yin Z, Zhu Y, Shi J, He Y, Zhang F. The role of the Notch signaling pathway in bacterial infectious diseases. Microb Pathog 2024; 188:106557. [PMID: 38272330 DOI: 10.1016/j.micpath.2024.106557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 01/22/2024] [Accepted: 01/22/2024] [Indexed: 01/27/2024]
Abstract
The Notch signaling pathway is the most crucial link in the normal operation and maintenance of physiological functions of mammalian life processes. Notch receptors interact with ligands and this leads to three cleavages and goes on to enter the nucleus to initiate the transcription of target genes. The Notch signaling pathway deeply participates in the differentiation and function of various cells, including immune cells. Recent studies indicate that the outcomes of Notch signaling are changeable and highly dependent on different bacterial infection. The Notch signaling pathway plays a different role in promoting and inhibiting bacterial infection. In this review, we focus on the latest research findings of the Notch signaling pathway in bacterial infectious diseases. The Notch signaling pathway is critically involved in a variety of development processes of immunosuppression of different APCs. The Notch signaling pathway leads to functional changes in epithelial cells to aggravate tissue damage. Specifically, we illustrate the regulatory mechanism of the Notch signaling pathway in various bacterial infections, such as Mycobacterium tuberculosis, Mycobacterium avium paratuberculosis, Mycobacterium leprae, Helicobacter pylori, Klebsiella pneumoniae, Bacillus subtilis, Staphylococcus aureus, Ehrlichia chaffeensis and sepsis. Collectively, this review will not only help beginners intuitively and systematically understand the Notch signaling pathway in bacterial infectious diseases but also help experts to generate fresh insight in this field.
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Affiliation(s)
- Zhengwei Yin
- The First Affiliated Hospital of Xinjiang Medical University, No. 393, Xinyi Road, Urumqi, 830011, Xinjiang, China
| | - Yuejie Zhu
- Reproductive Fertility Assistance Center, First Affiliated Hospital of Xinjiang Medical University, China
| | - Juan Shi
- The First Affiliated Hospital of Xinjiang Medical University, No. 393, Xinyi Road, Urumqi, 830011, Xinjiang, China
| | - Yueyue He
- Department of Immunology, School of Basic Medical Sciences, Xinjiang Medical University, No. 393, Xinyi Road, Urumqi, 830011, Xinjiang, China
| | - Fengbo Zhang
- The First Affiliated Hospital of Xinjiang Medical University, No. 393, Xinyi Road, Urumqi, 830011, Xinjiang, China.
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Wang Z, Su Y, Zhao M, Ma Z, Li J, Hou Z, Li H. NOTCH1 as a Negative Regulator of Avian Adipocyte Differentiation: Implications for Fat Deposition. Animals (Basel) 2024; 14:585. [PMID: 38396553 PMCID: PMC10886207 DOI: 10.3390/ani14040585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 02/02/2024] [Accepted: 02/07/2024] [Indexed: 02/25/2024] Open
Abstract
The NOTCH signaling pathway plays a pivotal role in diverse developmental processes, including cell proliferation and differentiation. In this study, we investigated whether this signaling molecules also contribute to avian adipogenesis. Using previous mRNA-seq datasets, we examined the expression of 11 signaling members during avian adipocyte differentiation. We found most members are down-regulated throughout differentiation (p < 0.05). As a representative, NOTCH1 was decreased in cultured chicken abdominal adipocytes during adipogenesis at mRNA and protein levels (p < 0.05). Moreover, using an overexpression plasmid for NOTCH1's intracellular domain (NICD1), as well as siRNA and DAPT to activate or deplete NOTCH1 in cells, we investigated the role of NOTCH1 in avian adipogenesis. Our findings illuminate that NOTCH1 activates the expression of HES1 and SOCS3 while it decreases NR2F2 and NUMB (p < 0.05), as well as inhibits oleic acid-induced adipocyte differentiation (p < 0.01). We further demonstrate that HES1, a downstream transcription factor activated by NOTCH1, also significantly inhibits adipogenesis by suppressing PPARγ and C/EBPα (p < 0.01). Collectively, these findings establish NOTCH1 as a negative regulator of avian adipocyte differentiation, unveiling NOTCH signaling as a potential target for regulating avian fat deposition.
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Affiliation(s)
- Zheng Wang
- College of Life Sciences, Shanxi Agricultural University, Jinzhong 030801, China; (Z.W.); (Y.S.); (M.Z.); (Z.M.)
| | - Yue Su
- College of Life Sciences, Shanxi Agricultural University, Jinzhong 030801, China; (Z.W.); (Y.S.); (M.Z.); (Z.M.)
| | - Mingyu Zhao
- College of Life Sciences, Shanxi Agricultural University, Jinzhong 030801, China; (Z.W.); (Y.S.); (M.Z.); (Z.M.)
| | - Zhenhua Ma
- College of Life Sciences, Shanxi Agricultural University, Jinzhong 030801, China; (Z.W.); (Y.S.); (M.Z.); (Z.M.)
| | - Jianhui Li
- College of Animal Science, Shanxi Agricultural University, Jinzhong 030801, China;
| | - Zhuocheng Hou
- National Engineering Laboratory for Animal Breeding and MARA Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
| | - Huifeng Li
- College of Life Sciences, Shanxi Agricultural University, Jinzhong 030801, China; (Z.W.); (Y.S.); (M.Z.); (Z.M.)
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Ning H, Liu J, Tan J, Yi M, Lin X. The role of the Notch signalling pathway in the pathogenesis of ulcerative colitis: from the perspective of intestinal mucosal barrier. Front Med (Lausanne) 2024; 10:1333531. [PMID: 38249980 PMCID: PMC10796567 DOI: 10.3389/fmed.2023.1333531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 12/12/2023] [Indexed: 01/23/2024] Open
Abstract
Ulcerative colitis is a common digestive disorder worldwide, with increasing incidence in recent years. It is an urgent problem to be solved, as it seriously affects and threatens the health and life of the global population. Studies have shown that dysfunction of the intestinal mucosal barrier is a critical pathogenic factor and molecular basis of ulcerative colitis, and some scholars have described it as a "barrier organ disease." While the Notch signalling pathway affects a series of cellular processes, including proliferation, differentiation, development, migration, and apoptosis. Therefore, it can regulate intestinal stem cells, CD4+ T cells, innate lymphoid cells, macrophages, and intestinal microbiota and intervene in the chemical, physical, immune, and biological mucosal barriers in cases of ulcerative colitis. The Notch signalling pathway associated with the pathogenesis of ulcerative colitis has distinct characteristics, with good regulatory effects on the mucosal barrier. However, research on ulcerative colitis has mainly focused on immune regulation, anti-inflammatory activity, and antioxidant stress; therefore, the study of the Notch signalling pathway suggests the possibility of understanding the pathogenesis of ulcerative colitis from another perspective. In this article we explore the role and mechanism of the Notch signalling pathway in the pathogenesis of ulcerative colitis from the perspective of the intestinal mucosal barrier to provide new targets and theoretical support for further research on the pathogenesis and clinical treatment of ulcerative colitis.
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Affiliation(s)
- Hang Ning
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China
| | - Jiemin Liu
- Guizhou Provincial People’s Hospital, Guiyang, China
| | - Jiaqian Tan
- Medical School, Hunan University of Chinese Medicine, Changsha, China
| | - Mengni Yi
- School of Traditional Chinese Medicine, Hunan University of Chinese Medicine, Changsha, China
| | - Xiaoyuan Lin
- The First Hospital of Hunan University of Chinese Medicine, Changsha, China
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Li Y, Lei Z, Guo Y, Liu Y, Guo X, Wang X, Che J, Yuan J, Wang C, Li M. Fermentation of Ganoderma lucidum and Raphani Semen with a probiotic mixture attenuates cyclophosphamide-induced immunosuppression through microbiota-dependent or -independent regulation of intestinal mucosal barrier and immune responses. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 121:155082. [PMID: 37722243 DOI: 10.1016/j.phymed.2023.155082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 09/01/2023] [Accepted: 09/10/2023] [Indexed: 09/20/2023]
Abstract
BACKGROUND Probiotic fermentation is a promising strategy for improving the nutritional and functional properties of traditional Chinese medicines (TCMs). Ganoderma lucidum and Raphani Semen are famous TCMs that have been shown to help alleviate immune system disorders. However, few studies have experimentally investigated the effects of probiotic-fermented G.lucidum and Raphani Semen on the immune system. PURPOSE We established the in vitro fermentation of G. lucidum and Raphani Semen with a probiotic mixture (Bifidobacterium longum, Lactobacillus acidophilus, and l. fermentum) (GRFB), investigated its ameliorating effect against cyclophosphamide (CTX)-induced immunosuppression, and explored its possible mechanisms. METHODS First, the different components in GRFB were identified by high-performance liquid chromatography. Second, its immune-stimulatory activities were evaluated in CTX-treated mice. Lastly, its possible in vitro and in vivo mechanisms were studied. RESULTS Probiotic fermentation of G. lucidum and Raphani Semen altered some of its chemical constituents, potentially helping improve the ability of GRFB to alleviate immunosuppression. As expected, GRFB effectively ameliorated CTX-induced immunosuppression by increasing the number of splenic lymphocytes and regulating the secretion of serum and ileum cytokines. GRFB supplementation also effectively improved intestinal integrity in CTX-treated mice by upregulating tight junction proteins. It also protects against CTX-induced intestinal dysbiosis by increasing the abundance of beneficial bacteria and reducing the abundance of harmful bacteria. GRFB could directly promote intestinal immunity but not systemic immunity in vitro, suggesting a microbiota-dependent regulation of GRFB. Interestingly, cohousing CTX-induced immunosuppressed mice with GRFB-treated mice promoted their symptoms recovery. Enhanced CTX-induced immunosuppression by GRFB in vitro depended on the gut microbiota. Remarkably, a Kyoto Encyclopedia of Genes and Genomes analysis showed that the GRFB-reprogrammed microbiota was significantly enriched in DNA damage repair pathways, which contribute to repairing the intestinal mucosal barrier. CONCLUSION This is the first study to suggest that compare with unfermented G. lucidum and Raphani Semen, GRFB can more effectively promote intestinal immunity and manipulate the gut microbiota to promote immunostimulatory activity and repair immunosuppression-induced intestinal barrier damage by biotransforming G.lucidum and Raphani Semen components.
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Affiliation(s)
- Yuyuan Li
- Advanced Institute for Medical Sciences, Dalian Medical University, Dalian, China
| | - Zengjie Lei
- College of Basic Medical Science, Dalian Medical University, Dalian, China
| | - Yuling Guo
- College of Basic Medical Science, Dalian Medical University, Dalian, China
| | - Yujia Liu
- College of Basic Medical Science, Dalian Medical University, Dalian, China
| | - Xiujie Guo
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Chinese Academy of Sciences, Dalian Institute of Chemical Physics, China
| | - Xiuli Wang
- College of Basic Medical Science, Dalian Medical University, Dalian, China
| | - Jian Che
- Aim Honesty Biopharmaceutical Co., Ltd, Dalian, China
| | - Jieli Yuan
- College of Basic Medical Science, Dalian Medical University, Dalian, China
| | - Chaoran Wang
- CAS Key Laboratory of Separation Science for Analytical Chemistry, Chinese Academy of Sciences, Dalian Institute of Chemical Physics, China.
| | - Ming Li
- College of Basic Medical Science, Dalian Medical University, Dalian, China.
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Zhang F, Huang W, Zhao L. Regulatory Effects of Ganoderma lucidum, Grifola frondosa, and American ginseng Extract Formulation on Gut Microbiota and Fecal Metabolomics in Mice. Foods 2023; 12:3804. [PMID: 37893697 PMCID: PMC10606397 DOI: 10.3390/foods12203804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/12/2023] [Accepted: 10/13/2023] [Indexed: 10/29/2023] Open
Abstract
The bioactivities of Ganoderma lucidum, Grifola frondosa, and American ginseng have been extensively studied and documented. However, the effects of their complexes on the structural properties of intestinal microbiota and fecal metabolism remain unclear. Therefore, this paper aims to present a preliminary study to shed light on this aspect. In this study, an immunocompromised mouse model was induced using cyclophosphamide, and Ganoderma lucidum, Grifola frondosa, and American ginseng extract formulation (referred to as JGGA) were administered via gavage to investigate their modulatory effects on gut microbiota and fecal metabolism in mice. The effects of JGGA on immune enhancement were explored using serum test kits, hematoxylin-eosin staining, 16SrDNA high-throughput sequencing, and UHPLC-QE-MS metabolomics. The findings revealed potential mechanisms underlying the immune-enhancing effects of JGGA. Specifically, JGGA administration resulted in an improved body weight, thymic index, splenic index, carbon scavenging ability, hypersensitivity, and cellular inflammatory factor expression levels in mice. Further analysis demonstrated that JGGA reduced the abundance of Firmicutes, Proteobacteria, and Actinobacteria, while increasing the abundance of Bacteroidetes. Additionally, JGGA modulated the levels of 30 fecal metabolites. These results suggest that the immune enhancement observed with JGGA may be attributed to the targeted modulation of gut microbiota and fecal metabolism, thus promoting increased immunity in the body.
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Affiliation(s)
- Fengli Zhang
- National Engineering Research Center of JUNCAO Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (F.Z.); (W.H.)
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Wenqi Huang
- National Engineering Research Center of JUNCAO Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (F.Z.); (W.H.)
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Lina Zhao
- National Engineering Research Center of JUNCAO Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China; (F.Z.); (W.H.)
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An Y, Zhai Z, Wang X, Ding Y, He L, Li L, Mo Q, Mu C, Xie R, Liu T, Zhong W, Wang B, Cao H. Targeting Desulfovibrio vulgaris flagellin-induced NAIP/NLRC4 inflammasome activation in macrophages attenuates ulcerative colitis. J Adv Res 2023; 52:219-232. [PMID: 37586642 PMCID: PMC10555950 DOI: 10.1016/j.jare.2023.08.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 08/11/2023] [Accepted: 08/13/2023] [Indexed: 08/18/2023] Open
Abstract
INTRODUCTION The perturbations of gut microbiota could interact with excessively activated immune responses and play key roles in the etiopathogenesis of ulcerative colitis (UC). Desulfovibrio, the most predominant sulfate reducing bacteria (SRB) resided in the human gut, was observed to overgrow in patients with UC. The interactions between specific gut microbiota and drugs and their impacts on UC treatment have not been demonstrated well. OBJECTIVES This study aimed to elucidate whether Desulfovibrio vulgaris (D. vulgaris, DSV) and its flagellin could activate nucleotide-binding oligomerization domain-like receptors (NLR) family of apoptosis inhibitory proteins (NAIP) / NLR family caspase activation and recruitment domain-containing protein 4 (NLRC4) inflammasome and promote colitis, and further evaluate the efficacy of eugeniin targeting the interaction interface of D. vulgaris flagellin (DVF) and NAIP to attenuate UC. METHODS The abundance of DSV and the occurrence of macrophage pyroptosis in human UC tissues were investigated. Colitis in mice was established by dextran sulfate sodium (DSS) and gavaged with DSV or its purified flagellin. NAIP/NLRC4 inflammasome activation and macrophage pyroptosis were evaluated in vivo and in vitro. The effects of eugeniin on blocking the interaction of DVF and NAIP/NLRC4 and relieving colitis were also assessed. RESULTS The abundance of DSV increased in the feces of patients with UC and was found to be associated with disease activity. DSV and its flagellin facilitated DSS-induced colitis in mice. Mechanistically, RNA sequencing showed that gene expression associated with inflammasome complex and pyroptosis was upregulated after DVF treatment in macrophages. DVF was further demonstrated to induce significant macrophage pyroptosis in vitro, depending on NAIP/NLRC4 inflammasome activation. Furthermore, eugeniin was screened as an inhibitor of the interface between DVF and NAIP and successfully alleviated the proinflammatory effect of DVF in colitis. CONCLUSION Targeting DVF-induced NAIP/NLRC4 inflammasome activation and macrophage pyroptosis ameliorates UC. This finding is of great significance for exploring the gut microbiota-host interactions in UC development and providing new insights for precise treatment.
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Affiliation(s)
- Yaping An
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Zihan Zhai
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Xin Wang
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Yiyun Ding
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Linlin He
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Lingfeng Li
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Qi Mo
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Chenlu Mu
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Runxiang Xie
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Tianyu Liu
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Weilong Zhong
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Bangmao Wang
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China
| | - Hailong Cao
- Department of Gastroenterology and Hepatology, General Hospital, Tianjin Medical University, National Key Clinical Specialty, Tianjin Institute of Digestive Diseases, Tianjin Key Laboratory of Digestive Diseases, Tianjin, China.
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Singh SB, Carroll-Portillo A, Lin HC. Desulfovibrio in the Gut: The Enemy within? Microorganisms 2023; 11:1772. [PMID: 37512944 PMCID: PMC10383351 DOI: 10.3390/microorganisms11071772] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/26/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
Desulfovibrio (DSV) are sulfate-reducing bacteria (SRB) that are ubiquitously present in the environment and as resident commensal bacteria within the human gastrointestinal tract. Though they are minor residents of the healthy gut, DSV are opportunistic pathobionts that may overgrow in the setting of various intestinal and extra-intestinal diseases. An increasing number of studies have demonstrated a positive correlation between DSV overgrowth (bloom) and various human diseases. While the relationship between DSV bloom and disease pathology has not been clearly established, mounting evidence suggests a causal role for these bacteria in disease development. As DSV are the most predominant genera of SRB in the gut, this review summarizes current knowledge regarding the relationship between DSV and a variety of diseases. In this study, we also discuss the mechanisms by which these bacteria may contribute to disease pathology.
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Affiliation(s)
- Sudha B Singh
- Biomedical Research Institute of New Mexico, Albuquerque, NM 87108, USA
| | - Amanda Carroll-Portillo
- Division of Gastroenterology and Hepatology, University of New Mexico, Albuquerque, NM 87131, USA
| | - Henry C Lin
- Division of Gastroenterology and Hepatology, University of New Mexico, Albuquerque, NM 87131, USA
- Medicine Service, New Mexico VA Health Care System, Albuquerque, NM 87108, USA
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Chen X, Li R, Zhao H, Wang X, Shao Z, Shang Z. Phenotype transition of fibroblasts incorporated into patient-derived oral carcinoma organoids. Oral Dis 2023; 29:913-922. [PMID: 34741375 DOI: 10.1111/odi.14071] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2021] [Revised: 09/22/2021] [Accepted: 10/29/2021] [Indexed: 01/05/2023]
Abstract
OBJECTIVE Cancer-associated fibroblasts (CAFs) are abundantly infiltrated in oral squamous cell carcinoma (OSCC), but the contact-dependent mechanisms that regulate CAFs phenotype in precursor cells, such as paracancerous fibroblasts (PFs), remain unclear. Here, a fibroblast-attached organoid (FAO) model was initiated to determine phenotype transition of fibroblasts triggered by contact with OSCC. MATERIAL AND METHODS Organoids and fibroblasts were generated using OSCC and adjacent tissues. Cell-clusters containing fibroblasts and tumour cells were aggregated to allow for FAOs expansion. Immunoblotting assay was performed to compare expression of Notch intracellular domain (NICD) in CAFs and PFs. Colony formation assay was employed to evaluate morphological activation of fibroblasts. RESULTS Compared to traditional 3D co-culture, FAOs better modulated the spatial distribution of fibroblasts with tumour nests. The presence of CAFs with multiple branches was stably observed in FAOs during serial passage. Incorporation with organoids promoted the ability of PFs to form multiple branches. Immunoblotting assay confirmed higher NICD level in CAFs than PFs. Treatment with Notch inhibitor, N-[N-(3, 5-difluorophenacetyl)-l-alanyl]-S-phenylglycine t-butyl ester (i.e. DAPT) blocked morphological activation of fibroblasts incorporated into FAO. CONCLUSION We developed a robust strategy to study contact-dependent mechanisms underlying tumour-stromal interaction, and suggested that Notch activity contributes to biogenesis of OSCC-associated fibroblasts.
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Affiliation(s)
- Xu Chen
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine of Ministry of education (KLOBM), School & Hospital of Stomatology, Wuhan University, Wuhan, 430089, China
| | - Rui Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine of Ministry of education (KLOBM), School & Hospital of Stomatology, Wuhan University, Wuhan, 430089, China
| | - Hui Zhao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine of Ministry of education (KLOBM), School & Hospital of Stomatology, Wuhan University, Wuhan, 430089, China
| | - Xinmiao Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine of Ministry of education (KLOBM), School & Hospital of Stomatology, Wuhan University, Wuhan, 430089, China
| | - Zhe Shao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine of Ministry of education (KLOBM), School & Hospital of Stomatology, Wuhan University, Wuhan, 430089, China
- Department of Oral and Maxillofacial-Head and Neck Oncology, School of Stomatology-Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Zhengjun Shang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory for Oral Biomedicine of Ministry of education (KLOBM), School & Hospital of Stomatology, Wuhan University, Wuhan, 430089, China
- Department of Oral and Maxillofacial-Head and Neck Oncology, School of Stomatology-Hospital of Stomatology, Wuhan University, Wuhan, China
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10
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Karnachuk OV, Panova IA, Panov VL, Ikkert OP, Kadnikov VV, Rusanov II, Avakyan MR, Glukhova LB, Lukina AP, Rakitin AV, Begmatov S, Beletsky AV, Pimenov NV, Ravin NV. Active Sulfate-Reducing Bacterial Community in the Camel Gut. Microorganisms 2023; 11:microorganisms11020401. [PMID: 36838366 PMCID: PMC9963290 DOI: 10.3390/microorganisms11020401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/18/2023] [Accepted: 02/01/2023] [Indexed: 02/08/2023] Open
Abstract
The diversity and activity of sulfate-reducing bacteria (SRB) in the camel gut remains largely unexplored. An abundant SRB community has been previously revealed in the feces of Bactrian camels (Camelus bactrianus). This study aims to combine the 16S rRNA gene profiling, sulfate reduction rate (SRR) measurement with a radioactive tracer, and targeted cultivation to shed light on SRB activity in the camel gut. Fresh feces of 55 domestic Bactrian camels grazing freely on semi-arid mountain pastures in the Kosh-Agach district of the Russian Altai area were analyzed. Feces were sampled in early winter at an ambient temperature of -15 °C, which prevented possible contamination. SRR values measured with a radioactive tracer in feces were relatively high and ranged from 0.018 to 0.168 nmol S cm-3 day-1. The 16S rRNA gene profiles revealed the presence of Gram-negative Desulfovibrionaceae and spore-forming Desulfotomaculaceae. Targeted isolation allowed us to obtain four pure culture isolates belonging to Desulfovibrio and Desulforamulus. An active SRB community may affect the iron and copper availability in the camel intestine due to metal ions precipitation in the form of sparingly soluble sulfides. The copper-iron sulfide, chalcopyrite (CuFeS2), was detected by X-ray diffraction in 36 out of 55 analyzed camel feces. In semi-arid areas, gypsum, like other evaporite sulfates, can be used as a solid-phase electron acceptor for sulfate reduction in the camel gastrointestinal tract.
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Affiliation(s)
- Olga V. Karnachuk
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
- Correspondence:
| | - Inna A. Panova
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
| | - Vasilii L. Panov
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
| | - Olga P. Ikkert
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
| | - Vitaly V. Kadnikov
- Institute of Bioengineering, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prosp, bld. 33-2, 119071 Moscow, Russia
| | - Igor I. Rusanov
- Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Marat R. Avakyan
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
| | - Lubov B. Glukhova
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
| | - Anastasia P. Lukina
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
| | - Anatolii V. Rakitin
- Laboratory of Biochemistry and Molecular Biology, Tomsk State University, 634050 Tomsk, Russia
| | - Shahjahon Begmatov
- Institute of Bioengineering, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prosp, bld. 33-2, 119071 Moscow, Russia
| | - Alexey V. Beletsky
- Institute of Bioengineering, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prosp, bld. 33-2, 119071 Moscow, Russia
| | - Nikolai V. Pimenov
- Institute of Microbiology, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia
| | - Nikolai V. Ravin
- Institute of Bioengineering, Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Prosp, bld. 33-2, 119071 Moscow, Russia
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11
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Wu X, He W, Mu X, Liu Y, Deng J, Liu Y, Nie X. Macrophage polarization in diabetic wound healing. BURNS & TRAUMA 2022; 10:tkac051. [PMID: 36601058 PMCID: PMC9797953 DOI: 10.1093/burnst/tkac051] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/22/2022] [Indexed: 12/31/2022]
Abstract
Impaired wound healing is one of the severe complications of diabetes. Macrophages have been shown to play a vital role in wound healing. In different wound environments, macrophages are classified into two phenotypes: classically activated macrophages and alternatively activated macrophages. Dysregulation of macrophage phenotypes leads to severely impaired wound healing in diabetes. Particularly, uncontrolled inflammation and abnormal macrophage phenotype are important reasons hindering the closure of diabetic wounds. This article reviews the functions of macrophages at various stages of wound healing, the relationship between macrophage phenotypic dysregulation and diabetic wound healing and the mechanism of macrophage polarization in diabetic wound healing. New therapeutic drugs targeting phagocyte polarization to promote the healing of diabetic wounds might provide a new strategy for treating chronic diabetic wound healing.
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Affiliation(s)
- Xingqian Wu
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Wenjie He
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Xingrui Mu
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Ye Liu
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Junyu Deng
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
| | - Yiqiu Liu
- College of Pharmacy, Zunyi Medical University, Zunyi 563000, China
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12
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Li C, Liu C, Li N. Causal associations between gut microbiota and adverse pregnancy outcomes: A two-sample Mendelian randomization study. Front Microbiol 2022; 13:1059281. [PMID: 36590417 PMCID: PMC9801412 DOI: 10.3389/fmicb.2022.1059281] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Accepted: 11/11/2022] [Indexed: 12/23/2022] Open
Abstract
Growing evidence indicates that gut microbiota could be closely associated with a variety of adverse pregnancy outcomes (APOs), but a causal link between gut microbiome and APOs has yet to be established. Therefore, in this study, we comprehensively investigated the relationship between gut microbiota and APOs to identify specific causal bacteria that may be associated with the development and occurrence of APOs by conducting a two-sample Mendelian randomization (MR) analysis. The microbiome genome-wide association study (GWAS) from the MiBioGen consortium was used as exposure data, and the GWAS for six common APOs was used as outcome data. Single-nucleotide polymorphisms (SNPs) that significantly correlated to exposure, data obtained from published GWAS, were selected as instrumental variables (IVs). We used the inverse variance-weighted (IVW) test as the main MR analysis to estimate the causal relationship. The Mendelian randomization pleiotropy residual sum and outlier (MR-PRESSO) and MR-Egger regression were used to confirm the presence of horizontal pleiotropy and to exclude outlier SNPs. We performed Cochran's Q test to assess the heterogeneity among SNPs associated with each bacterium. The leave-one-out sensitivity analysis was used to evaluate whether the overall estimates were affected by a single SNP. Our analysis shows a causal association between specific gut microbiota and APOs. Our findings offer novel insights into the gut microbiota-mediated development mechanism of APOs.
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Affiliation(s)
- Chuang Li
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Shenyang, China
| | - Caixia Liu
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Shenyang, China
| | - Na Li
- Department of Obstetrics and Gynecology, Shengjing Hospital of China Medical University, Shenyang, China,Key Laboratory of Maternal-Fetal Medicine of Liaoning Province, Shenyang, China,*Correspondence: Na Li
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13
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Gao Z, Zheng W, Li Y, Liu Y, Wu M, Li S, Li P, Liu G, Fu X, Wang S, Wang F, Cai Y, Feng X, Gu B, Zhong H, Yin Y. Mercury transformation processes in nature: Critical knowledge gaps and perspectives for moving forward. J Environ Sci (China) 2022; 119:152-165. [PMID: 35934460 DOI: 10.1016/j.jes.2022.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/11/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
The transformation of mercury (Hg) in the environment plays a vital role in the cycling of Hg and its risk to the ecosystem and human health. Of particular importance are Hg oxidation/reduction and methylation/demethylation processes driven or mediated by the dynamics of light, microorganisms, and organic carbon, among others. Advances in understanding those Hg transformation processes determine our capacity of projecting and mitigating Hg risk. Here, we provide a critical analysis of major knowledge gaps in our understanding of Hg transformation in nature, with perspectives on approaches moving forward. Our analysis focuses on Hg transformation processes in the environment, as well as emerging methodology in exploring these processes. Future avenues for improving the understanding of Hg transformation processes to protect ecosystem and human health are also explored.
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Affiliation(s)
- Zhiyuan Gao
- Centre for Earth Observation Science, and Department of Environment and Geography, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Wang Zheng
- Institute of Surface-Earth System Science, Tianjin University, Tianjin 300192, China
| | - Yanbin Li
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education and College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China
| | - Yurong Liu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Mengjie Wu
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210023, China
| | - Shouying Li
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210023, China
| | - Ping Li
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Guangliang Liu
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA
| | - Xuewu Fu
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Shuxiao Wang
- School of Environment and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
| | - Feiyue Wang
- Centre for Earth Observation Science, and Department of Environment and Geography, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Yong Cai
- Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA
| | - Xinbin Feng
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Baohua Gu
- Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Huan Zhong
- School of the Environment, Nanjing University, State Key Laboratory of Pollution Control and Resource Reuse, Nanjing 210023, China; Environmental and Life Sciences Program (EnLS), Trent University, Peterborough, Ontario K9L 0G2, Canada.
| | - Yongguang Yin
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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14
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Friedrich T, Ferrante F, Pioger L, Nist A, Stiewe T, Andrau JC, Bartkuhn M, Giaimo BD, Borggrefe T. Notch-dependent and -independent functions of transcription factor RBPJ. Nucleic Acids Res 2022; 50:7925-7937. [PMID: 35848919 PMCID: PMC9371899 DOI: 10.1093/nar/gkac601] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 05/27/2022] [Accepted: 07/05/2022] [Indexed: 11/14/2022] Open
Abstract
Signal transduction pathways often involve transcription factors that promote activation of defined target gene sets. The transcription factor RBPJ is the central player in Notch signaling and either forms an activator complex with the Notch intracellular domain (NICD) or a repressor complex with corepressors like KYOT2/FHL1. The balance between these two antagonizing RBPJ-complexes depends on the activation state of the Notch receptor regulated by cell-to-cell interaction, ligand binding and proteolytic cleavage events. Here, we depleted RBPJ in mature T-cells lacking active Notch signaling and performed RNA-Seq, ChIP-Seq and ATAC-seq analyses. RBPJ depletion leads to upregulation of many Notch target genes. Ectopic expression of NICD1 activates several Notch target genes and enhances RBPJ occupancy. Based on gene expression changes and RBPJ occupancy we define four different clusters, either RBPJ- and/or Notch-regulated genes. Importantly, we identify early (Hes1 and Hey1) and late Notch-responsive genes (IL2ra). Similarly, to RBPJ depletion, interfering with transcriptional repression by squelching with cofactor KYOT2/FHL1, leads to upregulation of Notch target genes. Taken together, RBPJ is not only an essential part of the Notch co-activator complex but also functions as a repressor in a Notch-independent manner.
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Affiliation(s)
- Tobias Friedrich
- Institute of Biochemistry, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392 Giessen, Germany.,Biomedical Informatics and Systems Medicine, Justus-Liebig-University Giessen, Aulweg 128, 35392 Giessen, Germany
| | - Francesca Ferrante
- Institute of Biochemistry, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Léo Pioger
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS-UMR 5535, 1919 Route de Mende, 34293 cedex 5, Montpellier, France
| | - Andrea Nist
- Genomics Core Facility, Institute of Molecular Oncology, Member of the German Center for Lung Research (DZL), Philipps-University, Hans-Meerwein-Str. 3, 35043 Marburg, Germany
| | - Thorsten Stiewe
- Genomics Core Facility, Institute of Molecular Oncology, Member of the German Center for Lung Research (DZL), Philipps-University, Hans-Meerwein-Str. 3, 35043 Marburg, Germany
| | - Jean-Christophe Andrau
- Institut de Génétique Moléculaire de Montpellier, University of Montpellier, CNRS-UMR 5535, 1919 Route de Mende, 34293 cedex 5, Montpellier, France
| | - Marek Bartkuhn
- Biomedical Informatics and Systems Medicine, Justus-Liebig-University Giessen, Aulweg 128, 35392 Giessen, Germany.,Institute for Lung Health, Aulweg 132, 35392 Giessen, Germany
| | - Benedetto Daniele Giaimo
- Institute of Biochemistry, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
| | - Tilman Borggrefe
- Institute of Biochemistry, Justus-Liebig-University Giessen, Friedrichstrasse 24, 35392 Giessen, Germany
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15
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Singh SB, Coffman CN, Varga MG, Carroll-Portillo A, Braun CA, Lin HC. Intestinal Alkaline Phosphatase Prevents Sulfate Reducing Bacteria-Induced Increased Tight Junction Permeability by Inhibiting Snail Pathway. Front Cell Infect Microbiol 2022; 12:882498. [PMID: 35694541 PMCID: PMC9177943 DOI: 10.3389/fcimb.2022.882498] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 04/25/2022] [Indexed: 11/13/2022] Open
Abstract
Tight junctions (TJs) are essential components of intestinal barrier integrity and protect the epithelium against passive paracellular flux and microbial translocation. Dysfunctional TJ leads to leaky gut, a condition associated with diseases including inflammatory bowel disease (IBD). Sulfate-Reducing Bacteria (SRB) are minor residents of the gut. An increased number of Desulfovibrio, the most predominant SRB, is observed in IBD and other diseases associated with leaky gut. However, it is not known whether Desulfovibrio contributes to leaky gut. We tested the hypothesis that Desulfovibrio vulgaris (DSV) may induce intestinal permeability in vitro. Snail, a transcription factor, disrupts barrier function by affecting TJ proteins such as occludin. Intestinal alkaline phosphatase (IAP), a host defense protein, protects epithelial barrier integrity. We tested whether DSV induced permeability in polarized Caco-2 cells via snail and if this effect was inhibited by IAP. Barrier integrity was assessed by measuring transepithelial electric resistance (TEER) and by 4kDa FITC-Dextran flux to determine paracellular permeability. We found that DSV reduced TEER, increased FITC-flux, upregulated snail protein expression, caused nuclear translocation of snail, and disrupted occludin staining at the junctions. DSV-induced permeability effects were inhibited in cells knocked down for snail. Pre-treatment of cells with IAP inhibited DSV-induced FITC flux and snail expression and DSV-mediated disruption of occludin staining. These data show that DSV, a resident commensal bacterium, can contribute to leaky gut and that snail may serve as a novel therapeutic target to mitigate DSV-induced effects. Taken together, our study suggests a novel underlying mechanism of association of Desulfovibrio bloom with diseases with increased intestinal permeability. Our study also underscores IAP as a novel therapeutic intervention for correcting SRB-induced leaky gut via inhibition of snail.
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Affiliation(s)
- Sudha B. Singh
- Biomedical Research Institute of New Mexico, New Mexico Veterans Affairs (VA) Health Care System, Albuquerque, NM, United States
| | - Cristina N. Coffman
- Biomedical Research Institute of New Mexico, New Mexico Veterans Affairs (VA) Health Care System, Albuquerque, NM, United States
| | - Matthew G. Varga
- Biomedical Research Institute of New Mexico, New Mexico Veterans Affairs (VA) Health Care System, Albuquerque, NM, United States
| | - Amanda Carroll-Portillo
- Division of Gastroenterology and Hepatology, Department of Medicine, University of New Mexico, Albuquerque, NM, United States
| | - Cody A. Braun
- Biomedical Research Institute of New Mexico, New Mexico Veterans Affairs (VA) Health Care System, Albuquerque, NM, United States
| | - Henry C. Lin
- Division of Gastroenterology and Hepatology, Department of Medicine, University of New Mexico, Albuquerque, NM, United States
- Medicine Service, New Mexico Veterans Affairs (VA) Health Care System, Albuquerque, NM, United States
- *Correspondence: Henry C. Lin,
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16
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Khoramjoo SM, Kazemifard N, Baradaran Ghavami S, Farmani M, Shahrokh S, Asadzadeh Aghdaei H, Sherkat G, Zali MR. Overview of Three Proliferation Pathways (Wnt, Notch, and Hippo) in Intestine and Immune System and Their Role in Inflammatory Bowel Diseases (IBDs). Front Med (Lausanne) 2022; 9:865131. [PMID: 35677821 PMCID: PMC9170180 DOI: 10.3389/fmed.2022.865131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 04/14/2022] [Indexed: 12/15/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a disorder, which involves the gastrointestinal (GI) tract consisting Crohn's disease (CD) and ulcerative colitis (UC). The etiology of this disease is not yet clear and, hence, there are numerous medications and treatments for patients with IBD, although a definite and permanent treatment is still missing. Therefore, finding novel therapeutic approaches are vital for curing patients with IBD. In the GI tract, there are various lineages of cells with different roles that their existence is necessary for the barrier function of intestinal epithelial cells (IECs). Therefore, signaling pathways, which manage the hemostasis of cell lineages in intestine, such as Wnt, Notch, and Hippo, could have crucial roles in regulation of barrier function in the intestine. Additionally, these signaling pathways function as a governor of cell growth, tissue homeostasis, and organ size. In patients with IBD, recent studies have revealed that these signaling pathways are dysregulated that it could result in depletion or excess of a cell lineage in the intestine. Moreover, dysregulation of these signaling pathways in different cell lineages of the immune system could lead to dysregulation of the immune system's responses in IBD. In this article, we summarized the components and signaling of Wnt, Notch, and Hippo pathways and their role in the intestine and immune system. Furthermore, we reviewed latest scientific literature on the crosstalk among these three signaling pathways in IBD. An overview of these three signaling pathways and their interactions in IBD could provide a novel insight for prospective study directions into finding efficient medications or treatments.
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Affiliation(s)
- Seyed Mobin Khoramjoo
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Nesa Kazemifard
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shaghayegh Baradaran Ghavami
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- *Correspondence: Shaghayegh Baradaran Ghavami
| | - Maryam Farmani
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shabnam Shahrokh
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamid Asadzadeh Aghdaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ghazal Sherkat
- Faculty of Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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