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Chaki S, Amponnawarat A, Levenstein B, Hui Y, Oskeritzian C, Ali H. Glatiramer acetate induces mast cell degranulation via MRGPRX2, implications for local and systemic adverse reactions. Allergy 2024; 79:758-761. [PMID: 38095027 PMCID: PMC10922971 DOI: 10.1111/all.15978] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 11/21/2023] [Accepted: 12/01/2023] [Indexed: 03/01/2024]
Affiliation(s)
- Shaswati Chaki
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, United States
| | - Aetas Amponnawarat
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, United States
- Department of Family and Community Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Brett Levenstein
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, United States
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Carole Oskeritzian
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Hydar Ali
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA 19104, United States
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Gao J, Li Y, Guan X, Mohammed Z, Gomez G, Hui Y, Zhao D, Oskeritzian CA, Huang H. IL-33 priming and antigenic stimulation synergistically promote the transcription of proinflammatory cytokine and chemokine genes in human skin mast cells. BMC Genomics 2023; 24:592. [PMID: 37798647 PMCID: PMC10557204 DOI: 10.1186/s12864-023-09702-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 09/27/2023] [Indexed: 10/07/2023] Open
Abstract
BACKGROUND Antigenic stimulation through cross-linking the IgE receptor and epithelial cell-derived cytokine IL-33 are potent stimuli of mast cell (MC) activation. Moreover, IL-33 primes a variety of cell types, including MCs to respond more vigorously to external stimuli. However, target genes induced by the combined IL-33 priming and antigenic stimulation have not been investigated in human skin mast cells (HSMCs) in a genome-wide manner. Furthermore, epigenetic changes induced by the combined IL-33 priming and antigenic stimulation have not been evaluated. RESULTS We found that IL-33 priming of HSMCs enhanced their capacity to promote transcriptional synergy of the IL1B and CXCL8 genes by 16- and 3-fold, respectively, in response to combined IL-33 and antigen stimulation compared to without IL-33 priming. We identified the target genes in IL-33-primed HSMCs in response to the combined IL-33 and antigenic stimulation using RNA sequencing (RNA-seq). We found that the majority of genes synergistically upregulated in the IL-33-primed HSMCs in response to the combined IL-33 and antigenic stimulation were predominantly proinflammatory cytokine and chemokine genes. Moreover, the combined IL-33 priming and antigenic stimulation increase chromatin accessibility in the synergy target genes but not synergistically. Transcription factor binding motif analysis revealed more binding sites for NF-κB, AP-1, GABPA, and RAP1 in the induced or increased chromatin accessible regions of the synergy target genes. CONCLUSIONS Our study demonstrates that IL-33 priming greatly potentiates MCs' ability to transcribe proinflammatory cytokine and chemokine genes in response to antigenic stimulation, shining light on how epithelial cell-derived cytokine IL-33 can cause exacerbation of skin MC-mediated allergic inflammation.
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Affiliation(s)
- Junfeng Gao
- Department of Immunology and Genomic Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, USA
| | - Yapeng Li
- Department of Immunology and Genomic Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, USA
| | - Xiaoyu Guan
- Department of Immunology and Genomic Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, USA
| | - Zahraa Mohammed
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA
- College of Medicine, AI-Mustansiriyah University, Baghdad, Iraq
| | - Gregorio Gomez
- Department of Biomedical Sciences, University of Houston College of Medicine, Houston, TX, USA
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Dianzheng Zhao
- Department of Immunology and Genomic Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, USA
| | - Carole A Oskeritzian
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Hua Huang
- Department of Immunology and Genomic Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, USA.
- Department of Immunology and Microbiology, University of Colorado School of Medicine, Denver, CO, USA.
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Miralda I, Samanas NB, Seo AJ, Foronda JS, Sachen J, Hui Y, Morrison SD, Oskeritzian CA, Piliponsky AM. Siglec-9 is an inhibitory receptor on human mast cells in vitro. J Allergy Clin Immunol 2023; 152:711-724.e14. [PMID: 37100120 PMCID: PMC10524464 DOI: 10.1016/j.jaci.2023.04.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 04/04/2023] [Accepted: 04/13/2023] [Indexed: 04/28/2023]
Abstract
BACKGROUND Mast cell activation is critical for the development of allergic diseases. Ligation of sialic acid-binding immunoglobin-like lectins (Siglecs), such as Siglec-6, -7, and -8 as well as CD33, have been shown to inhibit mast cell activation. Recent studies showed that human mast cells express Siglec-9, an inhibitory receptor also expressed by neutrophils, monocytes, macrophages, and dendritic cells. OBJECTIVE We aimed to characterize Siglec-9 expression and function in human mast cells in vitro. METHODS We assessed the expression of Siglec-9 and Siglec-9 ligands on human mast cell lines and human primary mast cells by real-time quantitative PCR, flow cytometry, and confocal microscopy. We used a clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) gene editing approach to disrupt the SIGLEC9 gene. We evaluated Siglec-9 inhibitory activity on mast cell function by using native Siglec-9 ligands, glycophorin A (GlycA), and high-molecular-weight hyaluronic acid, a monoclonal antibody against Siglec-9, and coengagement of Siglec-9 with the high-affinity receptor for IgE (FcεRI). RESULTS Human mast cells express Siglec-9 and Siglec-9 ligands. SIGLEC9 gene disruption resulted in increased expression of activation markers at baseline and increased responsiveness to IgE-dependent and IgE-independent stimulation. Pretreatment with GlycA or high-molecular-weight hyaluronic acid followed by IgE-dependent or -independent stimulation had an inhibitory effect on mast cell degranulation. Coengagement of Siglec-9 with FcεRI in human mast cells resulted in reduced degranulation, arachidonic acid production, and chemokine release. CONCLUSIONS Siglec-9 and its ligands play an important role in limiting human mast cell activation in vitro.
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Affiliation(s)
- Irina Miralda
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Wash
| | - Nyssa B Samanas
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Wash
| | - Albert J Seo
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Wash
| | - Jake S Foronda
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Wash
| | - Josie Sachen
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Wash
| | - Yvonne Hui
- University of South Carolina School of Medicine, Columbia, SC
| | - Shane D Morrison
- Department of Surgery, Division of Plastic Surgery, Seattle Children's Hospital, Seattle, Wash
| | | | - Adrian M Piliponsky
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, Wash; Department of Pediatrics, University of Washington School of Medicine, Seattle, Wash; Department of Pathology, University of Washington School of Medicine, Seattle, Wash; Department of Global Health, University of Washington School of Medicine, Seattle, Wash.
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4
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Avesta A, Hui Y, Aboian M, Duncan J, Krumholz HM, Aneja S. 3D Capsule Networks for Brain Image Segmentation. AJNR Am J Neuroradiol 2023; 44:562-568. [PMID: 37080721 PMCID: PMC10171390 DOI: 10.3174/ajnr.a7845] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 03/11/2023] [Indexed: 04/22/2023]
Abstract
BACKGROUND AND PURPOSE Current autosegmentation models such as UNets and nnUNets have limitations, including the inability to segment images that are not represented during training and lack of computational efficiency. 3D capsule networks have the potential to address these limitations. MATERIALS AND METHODS We used 3430 brain MRIs, acquired in a multi-institutional study, to train and validate our models. We compared our capsule network with standard alternatives, UNets and nnUNets, on the basis of segmentation efficacy (Dice scores), segmentation performance when the image is not well-represented in the training data, performance when the training data are limited, and computational efficiency including required memory and computational speed. RESULTS The capsule network segmented the third ventricle, thalamus, and hippocampus with Dice scores of 95%, 94%, and 92%, respectively, which were within 1% of the Dice scores of UNets and nnUNets. The capsule network significantly outperformed UNets in segmenting images that were not well-represented in the training data, with Dice scores 30% higher. The computational memory required for the capsule network is less than one-tenth of the memory required for UNets or nnUNets. The capsule network is also >25% faster to train compared with UNet and nnUNet. CONCLUSIONS We developed and validated a capsule network that is effective in segmenting brain images, can segment images that are not well-represented in the training data, and is computationally efficient compared with alternatives.
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Affiliation(s)
- A Avesta
- From the Department of Radiology and Biomedical Imaging (A.A., M.A., J.D.)
- Department of Therapeutic Radiology (A.A., Y.H., S.A.)
- Center for Outcomes Research and Evaluation (A.A., Y.H., H.M.K., S.A.)
| | - Y Hui
- Department of Therapeutic Radiology (A.A., Y.H., S.A.)
- Center for Outcomes Research and Evaluation (A.A., Y.H., H.M.K., S.A.)
| | - M Aboian
- From the Department of Radiology and Biomedical Imaging (A.A., M.A., J.D.)
| | - J Duncan
- From the Department of Radiology and Biomedical Imaging (A.A., M.A., J.D.)
- Departments of Statistics and Data Science (J.D.)
- Biomedical Engineering (J.D., S.A.), Yale University, New Haven, Connecticut
| | - H M Krumholz
- Center for Outcomes Research and Evaluation (A.A., Y.H., H.M.K., S.A.)
- Division of Cardiovascular Medicine (H.M.K.), Yale School of Medicine, New Haven, Connecticut
| | - S Aneja
- Department of Therapeutic Radiology (A.A., Y.H., S.A.)
- Center for Outcomes Research and Evaluation (A.A., Y.H., H.M.K., S.A.)
- Biomedical Engineering (J.D., S.A.), Yale University, New Haven, Connecticut
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5
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Carlucci CD, Hui Y, Chumanevich AP, Robida PA, Fuseler JW, Sajish M, Nagarkatti P, Nagarkatti M, Oskeritzian CA. Resveratrol Protects against Skin Inflammation through Inhibition of Mast Cell, Sphingosine Kinase-1, Stat3 and NF-κB p65 Signaling Activation in Mice. Int J Mol Sci 2023; 24:ijms24076707. [PMID: 37047680 PMCID: PMC10095068 DOI: 10.3390/ijms24076707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 04/07/2023] Open
Abstract
Inflammation is pathogenic to skin diseases, including atopic dermatitis (AD) and eczema. Treatment for AD remains mostly symptomatic with newer but costly options, tainted with adverse side effects. There is an unmet need for safe therapeutic and preventative strategies for AD. Resveratrol (R) is a natural compound known for its anti-inflammatory properties. However, animal and human R studies have yielded contrasting results. Mast cells (MCs) are innate immune skin-resident cells that initiate the development of inflammation and progression to overt disease. R’s effects on MCs are also controversial. Using a human-like mouse model of AD development consisting of a single topical application of antigen ovalbumin (O) for 7 days, we previously established that the activation of MCs by a bioactive sphingolipid metabolite sphingosine-1-phosphate (S1P) initiated substantial skin remodeling compared to controls. Here, we show that daily R application normalized O-mediated epidermal thickening, ameliorated cell infiltration, and inhibited skin MC activation and chemokine expression. We unraveled R’s multiple mechanisms of action, including decreased activation of the S1P-producing enzyme, sphingosine kinase 1 (SphK1), and of transcription factors Signal Transducer and Activator of Transcription 3 (Stat3) and NF-κBp65, involved in chemokine production. Thus, R may be poised for protection against MC-driven pathogenic skin inflammation.
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Affiliation(s)
- Christopher D. Carlucci
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Alena P. Chumanevich
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Piper A. Robida
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - John W. Fuseler
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Mathew Sajish
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, University of South Carolina, Columbia, SC 29208, USA
| | - Prakash Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
| | - Carole A. Oskeritzian
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, USA
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Zhou Y, Zhu X, Ren Y, Hui Y. Distribution of Cheyletus mites in dust samples. The European Zoological Journal 2022. [DOI: 10.1080/24750263.2022.2126533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Y. Zhou
- Department of Pediatrics Laboratory, The Affiliated Wuxi Children’s Hospital of Nanjing Medical University, China
| | - X. Zhu
- Department of Clinical Laboratory, The Affiliated Wuxi People’s Hospital of Nanjing Medical University, China
| | - Y. Ren
- Clinical Research Center, The Affiliated Wuxi People’s Hospital of Nanjing Medical University, China
| | - Y. Hui
- Department of Respiratory, The Affiliated Wuxi Children’s Hospital of Nanjing Medical University, China
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Bawazir M, Amponnawarat A, Hui Y, Oskeritzian CA, Ali H. Inhibition of MRGPRX2 but not FcεRI or MrgprB2-mediated mast cell degranulation by a small molecule inverse receptor agonist. Front Immunol 2022; 13:1033794. [PMID: 36275683 PMCID: PMC9582160 DOI: 10.3389/fimmu.2022.1033794] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Accepted: 09/16/2022] [Indexed: 11/17/2022] Open
Abstract
Mas-related G protein-coupled receptor-X2 (MRGPRX2) expressed on mast cells (MCs) contributes to hypersensitivity reactions to cationic US-Food and Drug Administration (FDA) approved drugs such as the neuromuscular blocking agent, rocuronium. In addition, activation of MRGPRX2 by the neuropeptide substance P (SP) and the pro-adrenomedullin peptide (PAMP-12) is associated with a variety of cutaneous conditions such as neurogenic inflammation, pain, atopic dermatitis, urticaria, and itch. Thus, small molecules aimed at blocking MRGPRX2 constitute potential options for modulating IgE-independent MC-mediated disorders. Two inverse MRGPRX2 agonists, named C9 and C9-6, have recently been identified, which inhibit basal G protein activation and agonist-induced calcium mobilization in transfected HEK293 cells. Substance P serves as a balanced agonist for MRGPRX2 whereby it activates both G protein-mediated degranulation and β-arrestin-mediated receptor internalization. The purpose of this study was to determine if C9 blocks MRGPRX2's G protein and β-arrestin-mediated signaling and to determine its specificity. We found that C9, but not its inactive analog C7, inhibited degranulation in RBL-2H3 cells stably expressing MRGPRX2 in response to SP, PAMP-12 and rocuronium with an IC50 value of ~300 nM. C9 also inhibited degranulation as measured by cell surface expression of CD63, CD107a and β-hexosaminidase release in LAD2 cells and human skin-derived MCs in response to SP but not the anaphylatoxin, C3a or FcϵRI-aggregation. Furthermore, C9 inhibited β-arrestin recruitment and MRGPRX2 internalization in response to SP and PAMP-12. We found that a G protein-coupling defective missense MRGPRX2 variant (V282M) displays constitutive activity for β-arrestin recruitment, and that this response was significantly inhibited by C9. Rocuronium, SP and PAMP-12 caused degranulation in mouse peritoneal MCs and these responses were abolished in the absence of MrgprB2 or cells treated with pertussis toxin but C9 had no effect. These findings suggest that C9 could provide an important framework for developing novel therapeutic approaches for the treatment of IgE-independent MC-mediated drug hypersensitivity and cutaneous disorders.
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Affiliation(s)
- Maram Bawazir
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Department of Oral Diagnostic Sciences, Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Aetas Amponnawarat
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Department of Family and Community Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Carole A. Oskeritzian
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Hydar Ali
- Department of Basic and Translational Sciences, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, United States
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8
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Chaki S, Alkanfari I, Roy S, Amponnawarat A, Hui Y, Oskeritzian CA, Ali H. Inhibition of Orai Channel Function Regulates Mas-Related G Protein-Coupled Receptor-Mediated Responses in Mast Cells. Front Immunol 2022; 12:803335. [PMID: 35126366 PMCID: PMC8810828 DOI: 10.3389/fimmu.2021.803335] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 12/28/2021] [Indexed: 11/13/2022] Open
Abstract
Mast cells (MCs) are tissue resident immune cells that play important roles in the pathogenesis of allergic disorders. These responses are mediated via the cross-linking of cell surface high affinity IgE receptor (FcϵRI) by antigen resulting in calcium (Ca2+) mobilization, followed by degranulation and release of proinflammatory mediators. In addition to FcϵRI, cutaneous MCs express Mas-related G protein-coupled receptor X2 (MRGPRX2; mouse ortholog MrgprB2). Activation of MRGPRX2/B2 by the neuropeptide substance P (SP) is implicated in neurogenic inflammation, chronic urticaria, mastocytosis and atopic dermatitis. Although Ca2+ entry is required for MRGPRX2/B2-mediated MC responses, the possibility that calcium release-activated calcium (CRAC/Orai) channels participate in these responses has not been tested. Lentiviral shRNA-mediated silencing of Orai1, Orai2 or Orai3 in a human MC line (LAD2 cells) resulted in partial inhibition of SP-induced Ca2+ mobilization, degranulation and cytokine/chemokine generation (TNF-α, IL-8, and CCL-3). Synta66, which blocks homo and hetero-dimerization of Orai channels, caused a more robust inhibition of SP-induced responses than knockdown of individual Orai channels. Synta66 also blocked SP-induced extracellular signal-regulated kinase 1/2 (ERK1/2) and Akt phosphorylation and abrogated cytokine/chemokine production. It also inhibited SP-induced Ca2+ mobilization and degranulation in primary human skin MCs and mouse peritoneal MCs. Furthermore, Synta66 attenuated both SP-induced cutaneous vascular permeability and leukocyte recruitment in mouse peritoneum. These findings demonstrate that Orai channels contribute to MRGPRX2/B2-mediated MC activation and suggest that their inhibition could provide a novel approach for the modulation of SP-induced MC/MRGPRX2-mediated disorders.
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Affiliation(s)
- Shaswati Chaki
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, United States
| | - Ibrahim Alkanfari
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, United States
- Faculty of Dentistry, King AbdulAziz University, Jeddah, Saudi Arabia
| | - Saptarshi Roy
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, United States
| | - Aetas Amponnawarat
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, United States
- Department of Family and Community Dentistry, Faculty of Dentistry, Chiang Mai University, Chiang Mai, Thailand
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Carole A. Oskeritzian
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, United States
| | - Hydar Ali
- Department of Basic and Translational Sciences, University of Pennsylvania School of Dental Medicine, Philadelphia, PA, United States
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9
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Liu K, Zeng M, Chen J, Hui Y, Kong Q, Duan Q, Sang H. Multisystem Langerhans cell histiocytosis with diabetes insipidus in an adult. Indian J Dermatol 2022; 67:184-186. [PMID: 36092185 PMCID: PMC9455141 DOI: 10.4103/ijd.ijd_741_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Kh Liu
- From the Jinling Hospital Department of Dermatology, Nanjing 210002, P R China,Nanjing Medical University, Nanjing 210002, P R China
| | - Mh Zeng
- From the Jinling Hospital Department of Dermatology, Nanjing 210002, P R China
| | - J Chen
- From the Jinling Hospital Department of Dermatology, Nanjing 210002, P R China
| | - Y Hui
- From the Jinling Hospital Department of Dermatology, Nanjing 210002, P R China
| | - Qt Kong
- From the Jinling Hospital Department of Dermatology, Nanjing 210002, P R China
| | - Qf Duan
- Unit 31610 of the PLA, Zhejiang 310000, P R China E-mail:
| | - H Sang
- From the Jinling Hospital Department of Dermatology, Nanjing 210002, P R China,Nanjing Medical University, Nanjing 210002, P R China
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10
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Shang Z, Ferris ZE, Sweeney D, Chase AB, Yuan C, Hui Y, Hou L, Older EA, Xue D, Tang X, Zhang W, Nagarkatti P, Nagarkatti M, Testerman TL, Jensen PR, Li J. Grincamycins P-T: Rearranged Angucyclines from the Marine Sediment-Derived Streptomyces sp. CNZ-748 Inhibit Cell Lines of the Rare Cancer Pseudomyxoma Peritonei. J Nat Prod 2021; 84:1638-1648. [PMID: 33899471 PMCID: PMC8650148 DOI: 10.1021/acs.jnatprod.1c00179] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
While marine natural products have been investigated for anticancer drug discovery, they are barely screened against rare cancers. Thus, in our effort to discover potential drug leads against the rare cancer pseudomyxoma peritonei (PMP), which currently lacks effective drug treatments, we screened extracts of marine actinomycete bacteria against the PMP cell line ABX023-1. This effort led to the isolation of nine rearranged angucyclines from Streptomyces sp. CNZ-748, including five new analogues, namely, grincamycins P-T (1-5). The chemical structures of these compounds were unambiguously established based on spectroscopic and chemical analyses. Particularly, grincamycin R (3) possesses an S-containing α-l-methylthio-aculose residue, which was discovered in nature for the first time. All of the isolated compounds were evaluated against four PMP cell lines and some exhibited low micromolar inhibitory activities. To identify a candidate biosynthetic gene cluster (BGC) encoding the grincamycins, we sequenced the genome of the producing strain, Streptomyces sp. CNZ-748, and compared the BGCs detected with those linked to the production of angucyclines with different aglycon structures.
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Affiliation(s)
- Zhuo Shang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Zachary E Ferris
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Douglas Sweeney
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Alexander B Chase
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Chunhua Yuan
- Nuclear Magnetic Resonance Facility, Campus Chemical Instrument Center, The Ohio State University, Columbus, Ohio 43210, United States
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Lukuan Hou
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Ethan A Older
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Dan Xue
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
| | - Xiaoyu Tang
- Institute of Chemical Biology, Shenzhen Bay Laboratory, Shenzhen 518132, China
| | - Weipeng Zhang
- College of Marine Life Sciences, Ocean University of China, Qingdao 266100, China
| | - Prakash Nagarkatti
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Traci L Testerman
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, United States
| | - Paul R Jensen
- Center for Marine Biotechnology and Biomedicine, Scripps Institution of Oceanography, University of California San Diego, La Jolla, California 92093, United States
| | - Jie Li
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United States
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11
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Li Y, Sun W, Saaoud F, Wang Y, Wang Q, Hodge J, Hui Y, Yin S, Lessner SM, Kong X, Fan D. MiR155 modulates vascular calcification by regulating Akt-FOXO3a signalling and apoptosis in vascular smooth muscle cells. J Cell Mol Med 2020; 25:535-548. [PMID: 33210462 PMCID: PMC7810936 DOI: 10.1111/jcmm.16107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/13/2020] [Accepted: 11/01/2020] [Indexed: 12/17/2022] Open
Abstract
microRNA‐155 (miR155) is pro‐atherogenic; however, its role in vascular calcification is unknown. In this study, we aim to examine whether miR155 regulates vascular calcification and to understand the underlying mechanism. Quantitative real‐time PCR showed that miR155 is highly expressed in human calcific carotid tissue and positively correlated with the expression of osteogenic genes. Wound‐healing assay and TUNEL staining showed deletion of miR155 inhibited vascular smooth muscle cell (VSMC) migration and apoptosis. miR155 deficiency attenuated calcification of cultured mouse VSMCs and aortic rings induced by calcification medium, whereas miR155 overexpression promoted VSMC calcification. Compared with wild‐type mice, miR155−/− mice showed significant resistance to vitamin D3 induced vascular calcification. Protein analysis showed that miR155 deficiency alleviated the reduction of Rictor, increased phosphorylation of Akt at S473 and accelerated phosphorylation and degradation of FOXO3a in cultured VSMCs and in the aortas of vitamin D3‐treated mice. A PI3K inhibitor that suppresses Akt phosphorylation increased, whereas a pan‐caspase inhibitor that suppresses apoptosis reduced VSMC calcification; and both inhibitors diminished the protective effects of miR155 deficiency on VSMC calcification. In conclusion, miR155 deficiency attenuates vascular calcification by increasing Akt phosphorylation and FOXO3a degradation, and thus reducing VSMC apoptosis induced by calcification medium.
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Affiliation(s)
- Yong Li
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Wei Sun
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA.,Department of Cardiology and Department of Cardiothoracic Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Fatma Saaoud
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Yuzhen Wang
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Quanyi Wang
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Johnie Hodge
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Yvonne Hui
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Sophia Yin
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Susan M Lessner
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Xiangqing Kong
- Department of Cardiology and Department of Cardiothoracic Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Daping Fan
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
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12
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Alkarkoushi RR, Hui Y, Tavakoli AS, Singh U, Nagarkatti P, Nagarkatti M, Chatzistamou I, Bam M, Testerman TL. Immune and microRNA responses to Helicobacter muridarum infection and indole-3-carbinol during colitis. World J Gastroenterol 2020; 26:4763-4785. [PMID: 32921956 PMCID: PMC7459201 DOI: 10.3748/wjg.v26.i32.4763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 07/16/2020] [Accepted: 08/12/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Indole-3-carbinol (I3C) and other aryl hydrocarbon receptor agonists are known to modulate the immune system and ameliorate various inflammatory and autoimmune diseases in animal models, including colitis induced by dextran sulfate sodium (DSS). MicroRNAs (miRNAs) are also gaining traction as potential therapeutic agents or diagnostic elements. Enterohepatic Helicobacter (EHH) species are associated with an increased risk of inflammatory bowel disease, but little is known about how these species affect the immune system or response to treatment.
AIM To determine whether infection with an EHH species alters the response to I3C and how the immune and miRNA responses of an EHH species compare with responses to DSS and inflammatory bowel disease.
METHODS We infected C57BL/6 mice with Helicobacter muridarum (H. muridarum), with and without DSS and I3C treatment. Pathological responses were evaluated by histological examination, symptom scores, and cytokine responses. MiRNAs analysis was performed on mesenteric lymph nodes to further evaluate the regional immune response.
RESULTS H. muridarum infection alone caused colonic inflammation and upregulated proinflammatory, macrophage-associated cytokines in the colon similar to changes seen in DSS-treated mice. Further upregulation occurred upon treatment with DSS. H. muridarum infection caused broad changes in mesenteric lymph node miRNA expression, but colitis-associated miRNAs were regulated similarly in H. muridarum-infected and uninfected, DSS-treated mice. In spite of causing colitis exacerbation, H. muridarum infection did not prevent disease amelioration by I3C. I3C normalized both macrophage- and T cell-associated cytokines.
CONCLUSION Thus, I3C may be useful for inflammatory bowel disease patients regardless of EHH infection. The miRNA changes associated with I3C treatment are likely the result of, rather than the cause of immune response changes.
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Affiliation(s)
- Rasha Raheem Alkarkoushi
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
| | - Abbas S Tavakoli
- College of Nursing, University of South Carolina, University of South Carolina, Columbia, SC 29208, United States
| | - Udai Singh
- Department of Medicine, Hematology and Oncology, University of Virginia School of Medicine, Charlottesville, VA 22908, United States
| | - Prakash Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
| | - Mitzi Nagarkatti
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
| | - Ioulia Chatzistamou
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
| | - Marpe Bam
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
| | - Traci L Testerman
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC 29209, United States
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13
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Yan Y, Wang F, Chen H, Zhao X, Yin D, Hui Y, Ma N, Yang C, Zheng Z, Zhang T, Xu N, Wang G. Efficacy of laparoscopic gastric bypass vs laparoscopic sleeve gastrectomy in treating obesity combined with type-2 diabetes. Br J Biomed Sci 2020; 78:35-40. [PMID: 32698681 DOI: 10.1080/09674845.2020.1798578] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
OBJECTIVE This prospective study compared the efficacy and safety of laparoscopic gastric bypass and laparoscopic sleeve gastrectomy in treating overweight and obese patients with BMI>28 kg/m2 and type-2 diabetes. METHODS Patients were randomized into a gastric bypass group (n = 77) or a gastrectomy group (n = 80). The surgery time, intraoperative blood loss, recovery time, and hospitalization time were collected. BMI, waistline, hipline, C-peptide level, insulin resistance index (HOMA-IR), and their blood and lipid profile were also measured. RESULTS Surgery time and blood loss were significantly higher in the gastrectomy group, when compared to the gastric bypass group (P < 0.05). In both groups, the levels of BMI, waist circumference and hip circumference (but not their ratio) gradually and significantly decreased after surgery compared with baseline (P < 0.05), and no significant difference was found between these two groups. The C-peptide level, HOMA-IR, fasting blood glucose, 2-hour postprandial blood glucose and glycosylated haemoglobin gradually and significantly decreased after surgery compared with the values before treatment (P < 0.05). The levels of total cholesterol, triglyceride, LDL, and monocyte chemoattractant protein-1 were also lower after surgery in both groups, while HDL and glucagon-like peptide-1 were significantly higher after surgery compared with the values before treatment (P < 0.05). However, no significant difference was found between these two groups of patients. CONCLUSION Both laparoscopic gastric bypass and laparoscopic sleeve gastrectomy improved the BMI and diabetic conditions of overweight/obese diabetics, while laparoscopic sleeve gastrectomy had a shorter surgical time and less blood loss.
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Affiliation(s)
- Y Yan
- Department of Gastrointestinal Surgery, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , JiangSu, China
| | - F Wang
- Department of Gastrointestinal Surgery, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , JiangSu, China
| | - H Chen
- Department of Gastrointestinal Surgery, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , JiangSu, China
| | - X Zhao
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Soochow University; the First Affiliated Hospital of Kangda College, Nanjing Medical University , Nanjing, China
| | - D Yin
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
| | - Y Hui
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
| | - N Ma
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
| | - C Yang
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
| | - Z Zheng
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
| | - T Zhang
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
| | - N Xu
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
| | - G Wang
- Department of Endocrinology, The Affiliated Lianyungang Hospital of Xuzhou Medical University, the First People's Hospital of Lianyungang; Lianyungang Clinical College of Nanjing Medical University, the First People's Hospital of Lianyungang , Jiangsu, China
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14
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Gao EJ, Hui Y, Wang N, Jia ZL, Zhao HW, Wu SY, Zhu MC. Synthesis, Crystal Structures, Interaction with DNA, Cytotoxicity, and Apoptosis Studies of Co(II), Cd(II) Complexes Bearing Pyrazine-2,3-dicarboxylic Acid. RUSS J COORD CHEM+ 2020. [DOI: 10.1134/s1070328420080035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Lawson PA, Patel NB, Mohammed A, Moore ERB, Lo AS, Sardi A, Davis JM, Doyle DA, Hui Y, Testerman T. Parapseudoflavitalea muciniphila gen. nov., sp. nov., a member of the family Chitinophagaceae isolated from a human peritoneal tumour and reclassification of Pseudobacter ginsenosidimutans as Pseudoflavitalea ginsenosidimutans comb. nov. Int J Syst Evol Microbiol 2020; 70:3639-3646. [PMID: 32501783 DOI: 10.1099/ijsem.0.004204] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, microaerophilic, non-motile, rod-shaped bacterium strain designated PMP191FT, was isolated from a human peritoneal tumour. Phylogenetic analysis based on 16S rRNA gene sequences indicated that the organism formed a lineage within the family Chitinophagaceae that was distinct from members of the genus Pseudoflavitalea (95.1-95.2 % sequence similarity) and Pseudobacter ginsenosidimutans (94.4 % sequence similarity). The average nucleotide identity values between strain PMP191FT and Pseudoflavitalea rhizosphaerae T16R-265T and Pseudobacter ginsenosidimutans Gsoil 221T was 68.9 and 62.3% respectively. The only respiratory quinone of strain PMP191FT was MK-7 and the major fatty acids were iso-C15 : 0, iso-C15 : 1 G and summed feature 3 (C16:1 ω7c and/or C16:1 ω6c). The polar lipids consisted of phosphatidylethanolamine and some unidentified amino and glycolipids. The G+C content of strain PMP191FT calculated from the genome sequence was 43.4 mol%. Based on phylogenetic, phenotypic and chemotaxonomic evidence, strain PMP191FT represents a novel species and genus for which the name Parapseudoflavitalea muciniphila gen. nov., sp. nov. is proposed. The type strain is PMP191FT (=DSM 104999T=ATCC BAA-2857T = CCUG 72691T). The phylogenetic analyses also revealed that Pseudobacter ginsenosidimutans shared over 98 % sequence similarly to members of the genus Pseudoflavitalea. However, the average nucleotide identity value between Pseudoflavitalea rhizosphaerae T16R-265T, the type species of the genus and Pseudobacter ginsenosidimutans Gsoil 221T was 86.8 %. Therefore, we also propose that Pseudobacter ginsenosidimutans be reclassified as Pseudoflavitalea ginsenosidimutans comb. nov.
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Affiliation(s)
- Paul A Lawson
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, USA
| | - Nisha B Patel
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, USA
| | - Ahmed Mohammed
- University of Baghdad School of Veterinary Medicine, Baghdad, Iraq.,Department of Pathology, Microbiology and Immunology, University of South Carolina, Columbia, SC, USA
| | - Edward R B Moore
- Culture Collection, Department of Clinical Bacteriology, University of Göteborg, S-41346 Göteborg, Sweden
| | | | - Armando Sardi
- Department of Surgical Oncology, Institute for Cancer Care at Mercy Medical Center, Baltimore, MD, USA
| | - Jeffrey M Davis
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, SC, USA
| | - D Annie Doyle
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, USA
| | - Yvonne Hui
- Department of Pathology, Microbiology and Immunology, University of South Carolina, Columbia, SC, USA
| | - Traci Testerman
- Department of Pathology, Microbiology and Immunology, University of South Carolina, Columbia, SC, USA
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16
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Li PhD J, Wen Jian Z, Hui Y, patrick T, Ling H, Xiaoru H, Anping X, Zhihua Z, Huiyao L. SAT-011 A negative regulatory role of Smad3 in B cell activation in lupus nephritis via the E4BP4-Mincle-Syk dependent mechanism. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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17
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Ye H, Liu XJ, Hui Y, Liang YH, Li CH, Wan Q. USF1 gene polymorphisms may associate with the efficacy and safety of chemotherapy based on paclitaxel and prognosis in the treatment of ovarian cancer. Neoplasma 2019; 65:153-160. [PMID: 29322800 DOI: 10.4149/neo_2018_170322n205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
This study was supposed to investigate the correlation between the functional single nucleotide polymorphisms (SNPs) (rs2516839 and rs3737787) in USF1 gene and the efficacy and safety of paclitaxel-based chemotherapy and prognosis in the treatment of ovarian cancer (OC). In total 100 OC patients were selected and divided into the sensitive group and the resistantgroup according to the tumor response to paclitaxel-based chemotherapy after surgery, and the incidence of observed and recorded toxic reaction. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method was applied to test the polymorphisms of rs2516839 and rs3737787 in USF1 gene after extraction of DNA. The correlation between USF1 gene polymorphisms and paclitaxel-based chemotherapy resistance was analyzed using Logistic regression analysis. Stratified analysis was used to test the incidence of toxic reaction in OC patients. Cox proportional hazard model was adapted to make a multiple-factor survival analysis. Significant differences exhibited in the genotype and the allele frequencies of rs2516839 between the sensitive and resistant groups, which showed no obvious difference in the genotype and allele frequencies of rs3737787. OC patients carrying the GA+AA genotype had higher incidence of serious toxic reaction than those carrying the GG genotype. Physical status score, tumor type, maximum tumor diameter and rs2516839 were the independent risk factors for the prognosis of OC patients. Taken together, our results suggest that the rs2516839 polymorphism in USF1 gene may associate with the efficacy and safety of paclitaxel-based chemotherapy and prognosis in the treatment of OC.
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18
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Alkarkoushi RR, Chatzistamou I, Hui Y, Nagarkatti M, Nagarkatti P, Testerman TL. Enterohepatic Helicobacter (EHH) species differ in their effects on colonic inflammation and colitis-associated colon tumorigenesis in mice. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.190.30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Enterohepatic Helicobacter (EHH) species are gram-negative bacteria that colonize the colons and sometimes the biliary tracts of humans, primates, rodents, and other mammals. Though ~20% of the human population may be infected, EHH species are poorly studied in humans. H. hepaticus is known for causing colitis in mice with severe immunologic abnormalities; however, virtually nothing is known about the influence of EHH species on colitis in wild-type mice, which are more relevant to humans. Dextran sulfate sodium (DSS) treatment and DSS plus azoxymethane (AOM ) are widely used as mouse models of ulcerative colitis and colitis-associated colon cancer. We hypothesized that specific EHH species would alter the course of DSS-induced colitis and colitis-associated colon tumorigenesis in mice. We infected C57BL/6 mice with human- and rodent-associated EHH species +/− DSS, or +/− DSS/AOM and measured the effects on pathology and inflammation markers. We found that H. cinaedi, H. pullorum, H. fennelliae exacerbate DSS-induced colitis and delay recovery, whereas H. hepaticus reduced the effect of DSS-induced colitis severity. H. hepaticus also prevented tumor development in the AOM/DSS colon cancer model. We measured the proinflammatory and the anti-inflammatory cytokines in serum and colon homogenates and found that cytokine induction varied among the EHH species. Therefore, EHH species alter susceptibility to DSS-induced colitis and DSS-AOM colon cancer. These results suggest that EHH species could increase or decrease the risk of inflammatory bowel disease or colorectal cancer in humans, making it important to identify the infecting species.
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19
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Alkarkoushi RR, Singh UP, Chatzistamou I, Bam M, Hui Y, Nagarkatti M, Nagarkatti P, Testerman TL. Indole-3-carbinol ameliorates colonic inflammation in DSS-treated, Helicobacter muridarum-infected mice. The Journal of Immunology 2019. [DOI: 10.4049/jimmunol.202.supp.185.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Enterohepatic Helicobacter species are epidemiologically linked to increased inflammatory bowel disease; however, little research has been done to elucidate potential contributions of individual species. We hypothesized that Helicobacter muridarum (Hm) would alter the course of DSS-induced colitis and the response to indole-3-carbinol (I3C), an anti-inflammatory phytochemical. We treated Hm-infected C57BL/6 mice with1% DSS +/− 40 mg/kg I3C and measured inflammatory biomarkers. We found that H. m exacerbated DSS-induced colitis and increased the percentage of Th17 cells in the mesenteric lymph nodes and spleen and increased IL-17 in colonic tissue compared to the DSS group. Also, we found that Hm bacteria itself produced inflammation and pathology. I3C, on the other hand, ameliorated colitis and shifted the Treg/Th17 balance in DSS+H.m-infected mice. We found that I3C treatment of DSS + H.m-infected mice decreased the expression of pro-inflammatory IL17 and RORC as well as increased anti-inflammatory Foxp3 when compared to the untreated group. The decreased expression of RORC correlated with increased miR-let7a-2 and miR-29a-3p expression and increased FoxP3 correlated with decreased miR-874 expression following I3C treatment. Moreover, I3C reduced the abundance of certain taxa, such as Clostridiales, Actinobacteria, and Erysipelotrichales, and increased the abundance of Ruminococcus. In summary, H. muridarum causes baseline inflammation and exacerbates colitis via microRNA-mediated increases in Th17 cells, while I3C ameliorates colitis via increased Treg populations.
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Affiliation(s)
| | | | | | - Marpe Bam
- 1Univ. of South Carolina Sch. of Med
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20
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Fang L, Hodge J, Saaoud F, Wang J, Iwanowycz S, Wang Y, Hui Y, Evans TD, Razani B, Fan D. Transcriptional factor EB regulates macrophage polarization in the tumor microenvironment. Oncoimmunology 2017. [PMID: 28638736 DOI: 10.1080/2162402x.2017.1312042] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Tumor microenvironment (TME) contains a variety of infiltrating immune cells. Among them, tumor-associated macrophages (TAMs) and their alternative activation contribute greatly to the progression of tumors. The mechanisms governing macrophage polarization in the TME are unclear. Here, we show that in TAMs or macrophages under tumor-conditioned medium treatment, the expression of transcription factor EB (TFEB) is reduced and more of the TFEB protein is in an inactive cytosolic form. Transforming growth factor (TGF)-β is identified as a main driving force for the reduced TFEB expression and activity in TAMs via activating ERK signaling. TFEB interference in macrophages significantly enhanced their alternative activation, with reduced expression of MHC-II and co-stimulatory molecule CD80, decreased ability to activate T cells, and increased ability to attract tumor cells. When co-inoculated with tumor cells, macrophages with TFEB knockdown significantly enhanced tumor growth with increased infiltration of M2-like macrophages, reduced infiltration of CD8+ T cells, and enhanced angiogenesis in the tumors. Mechanistic studies revealed that TFEB downregulation resulted in macrophage M2 polarization through reducing SOCS3 production and enhancing STAT3 activation. We further demonstrate that the activation of TFEB by hydroxypropyl-β-cyclodextrin in macrophages suppressed their M2 polarization and tumor-promoting capacity, and that macrophage-specific TFEB overexpression inhibited breast tumor growth in mice. Therefore, our data suggest that TFEB plays critical roles in macrophage polarization, and the downregulation of TFEB expression and activation is an integral part of tumor-induced immune editing in the TME. This study provides a rationale for a new cancer treatment strategy by modulating macrophage polarization through activating TFEB.
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Affiliation(s)
- Liang Fang
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA.,Department of Immunology, Fourth Military Medical University, Xi'an, China
| | - Johnie Hodge
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Fatma Saaoud
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Junfeng Wang
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Stephen Iwanowycz
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Yuzhen Wang
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Yvonne Hui
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Trent D Evans
- Cardiovascular Division, Department of Medicine and Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Babak Razani
- Cardiovascular Division, Department of Medicine and Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO, USA
| | - Daping Fan
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, SC, USA
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21
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Hui Y, Yang B, Lei H, Guan R, Xin Z. 148 Therapeutic Effects of Adipose-Derived Stem Cells-Based Micro-Tissues on Erectile Dysfunction in Streptozotocin-Induced Diabetic Rats. J Sex Med 2017. [DOI: 10.1016/j.jsxm.2016.11.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Xu H, He Y, Hui Y, Xiao X, Zhang X, Li C, Wang B. NCSTN mutations in hidradenitis suppurativa/acne inversa do not influence cytokine production by peripheral blood mononuclear cells. Br J Dermatol 2016; 176:277-279. [PMID: 27639175 DOI: 10.1111/bjd.15076] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- H Xu
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Y He
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - Y Hui
- Department of Dermatology, Jinling Hospital, Nanjing University Medical School, Nanjing, China
| | - X Xiao
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - X Zhang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - C Li
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
| | - B Wang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases and STIs, Nanjing, China
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Huo G, Liu C, Hui Y, Chen X, Xiao D. Synthesis and structure-activity relationship of oleanolic mono- or di-glycosides against Magnaporthe oryzae. Genet Mol Res 2016; 15:gmr8998. [PMID: 27706788 DOI: 10.4238/gmr.15038998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Saponins are naturally-occurring units with broad diversity and are usually recognized as phytoanticipins. In order to develop new saponin chemical entities with high activity against Magnaporthe oryzae, we selected oleanolic acid (OA), which has wide natural distribution and rich content in plants. We used the ability of OA to act as an aglycone for glycosylation to obtain information on the structure-activity relationship (SAR) for rational molecular pesticide design. Oleanolic mono- or di-glycosides were synthesized at either the C3-hydroxy and/or C28-carboxyl position, using trichloroacetimidate or glycosyl bromide donors, respectively. Structures were confirmed by [1H]-,[13C]-NMR. Furthermore, the activity of the synthesized glycosides against M. oryzae was assessed in vitro, based on the mycelium growth rate. The twenty five oleanolic mono- or di-glycosides comprised fourteen saponins with 3-monosaccharide residue 1a-1n, six saponins with 28-monosaccharide residue 2a-2f, and five saponins with 3, 28-monosaccharide residue 3a-3e; all showed different activities against M. oryzae according to their different structures. We concluded that the optimal oleanolic mono- and di-glycoside structure for activity against M. oryzae is a C3 connection of a hexose such as mannose, galactose, or glucose, in combination with a C28 connection to a small group such as allyl or a C3 connection to a pentose accompanied by a larger group such as another pentose or heptenyl at C28.
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Affiliation(s)
- G Huo
- Institute of Bioresource Conservation and Utilization/College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang, China
| | - C Liu
- College of Pharmacy, Gannan Medical University, Ganzhou, China
| | - Y Hui
- Institute of Bioresource Conservation and Utilization/College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang, China
| | - X Chen
- Institute of Bioresource Conservation and Utilization/College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang, China
| | - D Xiao
- Institute of Bioresource Conservation and Utilization/College of Bioscience and Engineering, Jiangxi Agricultural University, Nanchang, China
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Iwanowycz S, Wang J, Altomare D, Hui Y, Fan D. Emodin Bidirectionally Modulates Macrophage Polarization and Epigenetically Regulates Macrophage Memory. J Biol Chem 2016; 291:11491-503. [PMID: 27008857 DOI: 10.1074/jbc.m115.702092] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Indexed: 01/21/2023] Open
Abstract
Macrophages are pleiotropic cells capable of performing a broad spectrum of functions. Macrophage phenotypes are classified along a continuum between the extremes of proinflammatory M1 macrophages and anti-inflammatory M2 macrophages. The seemingly opposing functions of M1 and M2 macrophages must be tightly regulated for an effective and proper response to foreign molecules or damaged tissue. Excessive activation of either M1 or M2 macrophages contributes to the pathology of many diseases. Emodin is a Chinese herb-derived compound and has shown potential to inhibit inflammation in various settings. In this study, we tested the ability of emodin to modulate the macrophage response to both M1 and M2 stimuli. Primary mouse macrophages were stimulated with LPS/IFNγ or IL4 with or without emodin, and the effects of emodin on gene transcription, cell signaling pathways, and histone modifications were examined by a variety of approaches, including microarray, quantitative real-time PCR, Western blotting, chromatin immunoprecipitation, and functional assays. We found that emodin bidirectionally tunes the induction of LPS/IFNγ- and IL4-responsive genes through inhibiting NFκB/IRF5/STAT1 signaling and IRF4/STAT6 signaling, respectively. Thereby, emodin modulates macrophage phagocytosis, migration, and NO production. Furthermore, emodin inhibited the removal of H3K27 trimethylation (H3K27m3) marks and the addition of H3K27 acetylation (H3K27ac) marks on genes required for M1 or M2 polarization of macrophages. In conclusion, our data suggest that emodin is uniquely able to suppress the excessive response of macrophages to both M1 and M2 stimuli and therefore has the potential to restore macrophage homeostasis in various pathologies.
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Affiliation(s)
- Stephen Iwanowycz
- From the Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina 29209 and
| | - Junfeng Wang
- From the Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina 29209 and
| | - Diego Altomare
- the Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, University of South Carolina, Columbia, South Carolina 29208
| | - Yvonne Hui
- From the Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina 29209 and
| | - Daping Fan
- From the Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina 29209 and
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Xu H, Xiao X, Hui Y, Zhang X, He Y, Li C, Wang B. Phenotype of 53 Chinese individuals with nicastrin gene mutations in association with familial hidradenitis suppurativa (acne inversa). Br J Dermatol 2016; 174:927-9. [PMID: 26522179 DOI: 10.1111/bjd.14268] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- H Xu
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases & STDs, Nanjing, China
| | - X Xiao
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases & STDs, Nanjing, China
| | - Y Hui
- Department of Dermatology, Jinling Hospital, Nanjing University Medical School, Nanjing, China
| | - X Zhang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases & STDs, Nanjing, China
| | - Y He
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases & STDs, Nanjing, China
| | - C Li
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases & STDs, Nanjing, China
| | - B Wang
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, Jiangsu, China.,Jiangsu Key Laboratory of Molecular Biology for Skin Diseases & STDs, Nanjing, China
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Ma X, Hui Y, Lin L, Wu Y, Zhang X, Qin X. Possible relevance of tumor-related genes mutation to malignant transformation of endometriosis. EUR J GYNAECOL ONCOL 2016; 37:89-94. [PMID: 27048117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Despite studies have suggested that endometriosis has malignant potential, the molecular mechanism underlying the malignant transformation of endometriosis is poorly understood so far. Endometriosis-associated ovarian cancer (EAOC) or ovarian cancer arising from endometriosis (OCEM) may provide an ideal model for genetic studies. To investigate the genetic alterations during transformation of ovarian endometriosis into cancer, the authors analysed mutations of tumour-related genes (PTEN and p53) in EAOC cases (n=23, group 1), including 19 cases which were detected co-existence of endometriosis and cancer and four cases which fulfilled the histological criteria in malignant transformation of endometriosis (OCEMs), and in atypical hyperplasia ovarian endometriosis (aEMs) (n = 10, group 2), as well as in solitary ovarian endometriosis (EMs) (n = 20, group 3), simultaneously, to study the correlation of the two genes in the development and progression of the ovarian endometriosis malignancy. MATERIALS AND METHODS Each paraffin block was sliced into serial ten-µm-thick sections. Extracted DNA was amplified by nested PCR. Mutations of PTEN and p53 were examined by bidirectional DNA sequencing. RESULTS It was acknowledged by experiments that the PTEN and p53 mutation frequency in EAOCs were significantly higher than that in aEMs and EMs. There was significant difference to compare EAOCs with EMs (p < 0.01, p < 0.05), and converse to compare with aEMs (p > 0.05), respectively. No definite involvement between the frequency of PTEN and p53 mutations in EAOCs and age difference, histological type, clinical stage, pathological grade, and whether accompanied by metastasis (p > 0.05); however, a decreasing trend of PTEN mutation with the increased age, decreased clinical stage and pathological grade, and when accompanied by metastasis was detected. Adversely, an increasing trend of p53 mutation was represented. In EAOCs group, the authors detected eight PTEN and four p53 mutation events, respectively. Moreover, one case occurred PTEN and p53 mutation simultaneously. With 23 EAOCs, two cases which fulfilled the histological criteria in malignant transformation of endometriosis, which may be a specific entity distinct from non-endometriosis-associated ovarian cancer, the authors named them the OCEMs, occurred PTEN or p53 mutation, respectively. CONCLUSION The present study suggested that the mutation and functional incapacitation of certain tumor-related genes may be involved in malignant transformation of endometriosis. PTEN mutation is the pristine event, but p53 mutation is the late.
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Liu S, Jin K, Hui Y, Fu J, Jie C, Feng S, Reisman D, Wang Q, Fan D, Sukumar S, Chen H. HOXB7 promotes malignant progression by activating the TGFβ signaling pathway. Cancer Res 2014; 75:709-19. [PMID: 25542862 DOI: 10.1158/0008-5472.can-14-3100] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Overexpression of HOXB7 in breast cancer cells induces an epithelial-mesenchymal transition and promotes tumor progression and lung metastasis. However, the underlying mechanisms for HOXB7-induced aggressive phenotypes in breast cancer remain largely unknown. Here, we report that phosphorylation of SMAD3 was detected in a higher percentage in primary mammary tumor tissues from double-transgenic MMTV-Hoxb7/Her2 mice than tumors from single-transgenic Her2/neu mice, suggesting activation of TGFβ/SMAD3 signaling by HOXB7 in breast tumor tissues. As predicted, TGFβ2 was high in four MMTV-Hoxb7/Her2 transgenic mouse tumor cell lines and two breast cancer cell lines transfected with HOXB7, whereas TGFβ2 was low in HOXB7-depleted cells. HOXB7 directly bound to and activated the TGFβ2 promoter in luciferase and chromatin immunoprecipitation assays. Increased migration and invasion as a result of HOXB7 overexpression in breast cancer cells were reversed by knockdown of TGFβ2 or pharmacologic inhibition of TGFβ signaling. Furthermore, knockdown of TGFβ2 in HOXB7-overexpressing MDA-MB-231 breast cancer cells dramatically inhibited metastasis to the lung. Interestingly, HOXB7 overexpression also induced tumor-associated macrophage (TAM) recruitment and acquisition of an M2 tumor-promoting phenotype. TGFβ2 mediated HOXB7-induced activation of macrophages, suggesting that TAMs may contribute to HOXB7-promoted tumor metastasis. Providing clinical relevance to these findings, by real-time PCR analysis, there was a strong correlation between HOXB7 and TGFβ2 expression in primary breast carcinomas. Taken together, our results suggest that HOXB7 promotes tumor progression in a cell-autonomous and non-cell-autonomous manner through activation of the TGFβ signaling pathway.
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Affiliation(s)
- Shou Liu
- Department of Biological Science, University of South Carolina, Columbia, South Carolina. Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina
| | - Kideok Jin
- Department of Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Yvonne Hui
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Jie Fu
- Department of Biological Science, University of South Carolina, Columbia, South Carolina. Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina
| | - Chunfa Jie
- Department of Surgery, Transplant Surgery Division, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Sheng Feng
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina
| | - David Reisman
- Department of Biological Science, University of South Carolina, Columbia, South Carolina. Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina
| | - Qian Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina
| | - Daping Fan
- Department of Cell Biology and Anatomy, University of South Carolina School of Medicine, Columbia, South Carolina
| | - Saraswati Sukumar
- Department of Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland.
| | - Hexin Chen
- Department of Biological Science, University of South Carolina, Columbia, South Carolina. Center for Colon Cancer Research, University of South Carolina, Columbia, South Carolina.
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Li ZL, Guan HH, Xiao XM, Hui Y, Jia WX, Yu RX, Chen H, Li CR. Germline mutation analysis in the CYLD gene in Chinese patients with multiple trichoepitheliomas. Genet Mol Res 2014; 13:9650-5. [PMID: 25501176 DOI: 10.4238/2014.november.14.10] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Trichoepithelioma is a benign neoplasm that primarily shows follicular germinative differentiation. Classic trichoepithelioma typically presents as a skin-colored papule or nodule on the face or upper trunk; lesions have a predilection for the nose. Trichoepithelioma can be sporadic or familial and solitary or multiple. Most previously reported multiple trichoepithelioma cases are familial, and germline CYLD mutations could be detected in some patients. We performed mutational analysis of the germline CYLD gene in 8 Chinese multiple trichoepitheliomas patients, 6 of which were sporadic cases. A heterozygous missense mutation (c.1112C>A) in the 9th exon of the CYLD gene was detected in some mother-daughter patients. However, the germline CYLD mutation could not be detected in the 6 non-familial cases. The results suggest that the pathogenesis of sporadic multiple trichoepitheliomas may differ from that of familial cases. Our findings also further confirmed the genetic heterogeneity of multiple trichoepitheliomas.
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Affiliation(s)
- Z L Li
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - H H Guan
- Department of Dermatology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu Province, China
| | - X M Xiao
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - Y Hui
- Department of Dermatology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, Jiangsu Province, China
| | - W X Jia
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - R X Yu
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - H Chen
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
| | - C R Li
- Institute of Dermatology, Chinese Academy of Medical Sciences and Peking Union Medical College, Nanjing, China
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Du F, Yu F, Wang Y, Hui Y, Carnevale K, Fu M, Lu H, Fan D. MicroRNA-155 deficiency results in decreased macrophage inflammation and attenuated atherogenesis in apolipoprotein E-deficient mice. Arterioscler Thromb Vasc Biol 2014; 34:759-67. [PMID: 24504735 DOI: 10.1161/atvbaha.113.302701] [Citation(s) in RCA: 154] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
OBJECTIVE microRNA-155 (miR155) plays a critical role in immunity and macrophage inflammation. We aim to investigate the role of miR155 in atherogenesis. APPROACH AND RESULTS Quantitative real-time polymerase chain reaction showed that miR155 was expressed in mouse and human atherosclerotic lesions. miR155 expression in macrophages was correlated positively with proinflammatory cytokine expression. Lentivirus-mediated overexpression of miR155 in macrophages enhanced their inflammatory response to lipopolysaccharide through targeting suppressor of cytokine signaling-1 and impaired cholesterol efflux from acetylated low-density lipoprotein-loaded macrophages, whereas deficiency of miR155 blunted macrophage inflammatory responses and enhanced cholesterol efflux possibly via enhancing lipid loading-induced macrophage autophagy. We next examined the atherogenesis in apolipoprotein E-deficient (apoE(-/-)) and miR155(-/-)/apoE(-/-) (double knockout) mice fed a Western diet. Compared with apoE(-/-) mice, the double knockout mice developed less atherosclerosis lesion in aortic root, with reduced neutral lipid content and macrophages. Flow cytometric analysis showed that there were increased number of regulatory T cells and reduced numbers of Th17 cells and CD11b+/Ly6C(high) cells in the spleen of double knockout mice. Peritoneal macrophages from the double knockout mice had significantly reduced proinflammatory cytokine expression and secretion both in the absence and presence of lipopolysaccharide stimulation. To determine whether miR155 in leukocytes contributes to atherosclerosis, we performed a bone marrow transplantation study. Deficiency of miR155 in bone marrow-derived cells suppressed atherogenesis in apoE(-/-) mice, demonstrating that hematopoietic cell-derived miR155 plays a critical role. CONCLUSIONS miR155 deficiency attenuates atherogenesis in apoE(-/-) mice by reducing inflammatory responses of macrophages, enhancing macrophage cholesterol efflux and resulting in an antiatherogenic leukocyte profile. Targeting miR155 may be a promising strategy to halt atherogenesis.
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Affiliation(s)
- Fen Du
- From the Department of Biochemistry and Molecular Biology, School of Basic Medicine, Wuhan University, Wuhan, PR China (F.D.); the Department of Cell Biology and Anatomy (F.D., F.Y., Y.W., Y.H, H.L., D.F.) and the Department of Pathology, Microbiology, and Immunology (K.C.), University of South Carolina School of Medicine, Columbia; Department of Nutrition and Food Hygiene, the Fourth Military Medical University, Xi'an, Shaanxi, PR China (F.Y.); and Department of Basic Medical Science, School of Medicine, Shock/Trauma Research Center, University of Missouri, Kansas City (M.F.)
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Ng M, Lam W, Hui Y. P042 Evidence-based guideline on pharmacological management of osteoarthritis of knee in primary care settings in Hong Kong. BMJ Qual Saf 2013. [DOI: 10.1136/bmjqs-2013-002293.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
BACKGROUND Since a disproportionate amount of medical education still occurs in hospitals, there are concerns that medical school graduates are not fully prepared to deliver efficient and effective care in ambulatory settings to increasingly complex patients. AIMS To understand the current extent of scholarship in this area. METHOD A scoping review was conducted by searching electronic databases and grey literature sources for articles published between 2001 and 2011 that identified key challenges and models of practice for undergraduate teaching of ambulatory care. Relevant articles were charted and assigned key descriptors, which were mapped onto Canadian recommendations for the future of undergraduate medical education. RESULTS Most of the relevant articles originated in the United States, Australia, or the United Kingdom. Recommendations related to faculty development, learning contexts and addressing community needs had numerous areas of scholarly activity while scholarly activity was lacking for recommendations related to inter-professional practice, the use of technology, preventive medicine, and medical leadership. CONCLUSIONS Systems should be established to support education and research collaboration between medical schools to develop best practices and build capacity for change. This method of scoping the field can be applied using best practices and recommendations in other countries.
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Affiliation(s)
- Camille K Williams
- Graduate Department of Rehabilitation Science, University of Toronto, 200 Elizabeth Street, Toronto,Ontario, Canada.
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Hui Y, Safir O, Dubrowski A, Carnahan H. What skills should simulation training in arthroscopy teach residents? A focus on resident input. Int J Comput Assist Radiol Surg 2013; 8:945-53. [DOI: 10.1007/s11548-013-0833-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 03/11/2013] [Indexed: 10/27/2022]
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33
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Hui Y, Lieberman J, Sicherer S. Effect of A Reaction During Oral Food Challenges (OFC) on Food-specific IgE levels (sIgE). J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Safir O, Dubrowski A, Williams C, Hui Y, Backstein D, Carnahan H. The benefits of Fundamentals of Laparoscopic Surgery (FLS) training on simulated arthroscopy performance. Stud Health Technol Inform 2012; 173:412-417. [PMID: 22357027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Current theories of skill learning suggest that novices learn optimally in a simplified environment. This information can be incorporated in simulator designs. Our purpose was to assess whether basic visuospatial training is beneficial for performance on an arthroscopy model. One group of trainees practiced three visuomotor tasks while the other group was not given this opportunity. Both groups then performed three different surgical tasks on a simulated arthroscopy model. Practice with the visuomotor tasks enhanced performance on two of the tasks on the arthroscopy model. The basic navigational skills learned through practice transferred to the performance of arthroscopic surgery tasks and these skills should be included in the design of a comprehensive arthroscopy simulator.
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Affiliation(s)
- Oleg Safir
- Department of Surgery, University of Toronto, Canada
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Du F, Hui Y, Zhang M, Linton MF, Fazio S, Fan D. Novel domain interaction regulates secretion of proprotein convertase subtilisin/kexin type 9 (PCSK9) protein. J Biol Chem 2011; 286:43054-61. [PMID: 22027821 DOI: 10.1074/jbc.m111.273474] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
PCSK9 (proprotein convertase subtilisin/kexin type 9) has emerged as a novel therapeutic target for hypercholesterolemia due to its LDL receptor (LDLR)-reducing activity. Although its structure has been solved, the lack of a detailed understanding of the structure-function relation hinders efforts to develop small molecule inhibitors. In this study, we used mutagenesis and transfection approaches to investigate the roles of the prodomain (PD) and the C-terminal domain (CD) and its modules (CM1-3) in the secretion and function of PCSK9. Deletion of PD residues 31-40, 41-50, or 51-60 did not affect the self-cleavage, secretion, or LDLR-degrading activity of PCSK9, whereas deletion of residues 61-70 abolished all of these functions. Deletion of the entire CD protein did not impair PCSK9 self-cleavage or secretion but completely abolished LDLR-degrading activity. Deletion of any one or two of the CD modules did not affect self-cleavage but influenced secretion and LDLR-reducing activity. Furthermore, in cotransfection experiments, a secretion-defective PD deletion mutant (ΔPD) was efficiently secreted in the presence of CD deletion mutants. This was due to the transfer of PD from the cotransfected CD mutants to the ΔPD mutant. Finally, we found that a discrete CD protein fragment competed with full-length PCSK9 for binding to LDLR in vitro and attenuated PCSK9-mediated hypercholesterolemia in mice. These results show a previously unrecognized domain interaction as a critical determinant in PCSK9 secretion and function. This knowledge should fuel efforts to develop novel approaches to PCSK9 inhibition.
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Affiliation(s)
- Fen Du
- Department of Cell Biology and Anatomy, School of Medicine, University of South Carolina, Columbia, South Carolina 29209, USA
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Wang X, Wang H, He B, Hui Y, Lv G, Li L, Wen H. Virological and molecular characterization of Kaposi’s sarcoma-associated herpesvirus strains from Xinjiang, China. Eur J Clin Microbiol Infect Dis 2011; 31:53-9. [DOI: 10.1007/s10096-011-1274-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Accepted: 04/12/2011] [Indexed: 10/18/2022]
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Wei M, Junzhu C, Hui Y, Liangrong Z, Qianmin T, Yiming N. e0356 The research on calcium homeostasis expression and gene transcription of atrial myocytes in patients with atrial fibrillation. Heart 2010. [DOI: 10.1136/hrt.2010.208967.356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Goldstein D, Lee C, Hui Y, Shah B, Yip D, McArthur GA. Development of a nomogram to predict overall survival in patients with locally advanced or metastatic gastrointestinal stromal tumor receiving first-line treatment with imatinib. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.10054] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Wen S, Yang F, Li JG, Gong Y, Zhang XL, Hui Y, Wu YN, Zhao YF, Xu Y. Polychlorinated dibenzo-p-dioxin and dibenzofurans (PCDD/Fs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs) monitored by tree bark in an E-waste recycling area. Chemosphere 2009; 74:981-987. [PMID: 19118860 DOI: 10.1016/j.chemosphere.2008.10.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2008] [Revised: 07/31/2008] [Accepted: 10/05/2008] [Indexed: 05/27/2023]
Abstract
To investigate the environmental levels and profiles of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs), tree bark samples (n=22) were collected from Luqiao, an E-waste recycling area, in east China in July 11-13, 2006. The average concentrations of PCDD/Fs, PBDEs, and PCBs determined by isotope dilution-high resolution gas chromatography (HRGC) coupled with high resolution mass spectrometer (HRMS) were 0.1+/-0.0, 1.4+/-0.2, and 6.5+/-0.8 microg g(-1) lipid weight, respectively. PCDD/F-toxic equivalent (TEQ, WHO-1998), PCB-TEQs, and total dioxin-like TEQs were 1.3+/-0.1, 0.5+/-0.0, and 1.8+/-0.2 ng g(-1) lipid weight, respectively. The profiles of these pollutants in the tree bark were also discussed. Tetra-CDFs, deca-BDE and tri-CBs were the main homologues and accounted for 47% of total PCDD/Fs, 79.3% of total PBDEs, and 33.2% of total PCBs, respectively; As for TEQs, 2,3,4,7,8-PeCDF and PCB126 were the main contributors and accounted for 36% of the total PCDD/F-TEQs and 81.2% of the total PCB-TEQs, respectively. High accumulation of PCDD/Fs, PBDEs, and PCBs detected in the tree bark indicated heavy contaminations of these pollutants in Luqiao area.
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Affiliation(s)
- Sheng Wen
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China
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Yuling H, Ruijing X, Xiang J, Luokun X, Wenjun Y, Feng C, Baojun H, Hui Y, Guang Y, Chunlei Y, Jixin Z, Lang C, Li Q, Chang A, Zhuan B, Youxin J, Feili G, Jinquan T. Essential role of sphingosine-1-phosphate receptor 1-bearing CD8+CD44+CCR7+ T cells in acute skin allograft rejection. Am J Transplant 2008; 8:1401-12. [PMID: 18510631 DOI: 10.1111/j.1600-6143.2008.02275.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A subset of naturally formed sphingosine-1-phosphate receptor 1 (S1P1)-bearing CD8(+)CD44(+)CCR7(+) memory T cells has been identified in transplant recipient BALB/c (H-2(d)) mice. The frequency of this subset of memory T cells is significantly increased in the spleen, lymph nodes and skin grafts in the recipient BALB/c mice during acute skin allograft rejections. The immune-reconstitution with CD8(+)CD44(+)CCR7(+)S1P1(+) memory T cells facilitates acute skin allograft rejection in SCID mice. Being Th1-polarized and cytotoxic, CD8(+)CD44(+)CCR7(+)S1P1(+) memory T cells proliferate and differentiate immediately into effectors upon encountering allo-antigens. A siRNA against S1P1 inhibits CD8(+)CD44(+)CCR7(+)S1P1(+) memory T cell-mediated acute skin allograft rejection in SCID mice by means of knocking-down S1P1-expression. CCL21 mutant (CCL21-DeltaCT) has been used to compete with wild-type CCL21 in the course of binding to CCR7. Combined administration of siRNA S1P1 and CCL21-DeltaCT significantly prolongs the survival of skin allograft in the recipient BALB/c mice by means of inhibiting accumulation of CD8(+)CD44(+)CCR7(+)S1P1(+) memory T cells in the spleen and the skin grafts. Our data provide direct evidence that S1P1 and CCR7 are involved in the proliferation and trafficking of CD8(+)CD44(+)CCR7(+)S1P1(+) memory T cells. S1P1 may serve as a functional marker for CD8(+)CD44(+)CCR7(+) memory T cells. Targeting CD8(+)CD44(+)CCR7(+)S1P1(+) T cells may be a useful strategy to prolong the survival of allograft transplant.
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Affiliation(s)
- H Yuling
- Department of Immunology, and Laboratory of Allergy and Clinical Immunology, Institute of Allergy and Immune-Related Diseases and Center for Medical Research, Wuhan University School of Medicine, Wuhan, China
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Deng S, Bulmer GS, Summerbell RC, De Hoog GS, Hui Y, Gräser Y. Changes in frequency of agents of tinea capitis in school children from Western China suggest slow migration rates in dermatophytes. Med Mycol 2008; 46:421-7. [DOI: 10.1080/13693780701883730] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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LaVoie H, Hui Y. GATA4 AND GATA6 KNOCKDOWN IN GRANULOSA CELLS PROVIDE INSIGHT INTO REGULATION OF THE STAR GENE. Biol Reprod 2007. [DOI: 10.1093/biolreprod/77.s1.189a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Gao Q, Mou S, Ge J, To CH, Hui Y, Liu A, Wang Z, Long C, Tan J. A new strategy to replace the natural vitreous by a novel capsular artificial vitreous body with pressure-control valve. Eye (Lond) 2007; 22:461-8. [PMID: 17525767 DOI: 10.1038/sj.eye.6702875] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
PURPOSE The current vitreous substitutes such as silicone oil, heavy silicone oil, and polymeric gels that are directly injected into vitreous cavity frequently cause severe intraocular complications. There is a very urgent need to find a more suitable artificial vitreous substitute for pars plana vitrectomy (PPV) surgery. METHODS We have devised a novel capsular artificial vitreous using tailor-made silicone rubber elastomer. The novel device was implanted into the vitreous cavity of rabbit after PPV and the eye was examined by ophthalmoscopy, fundus photography, and tonometry during an 8-week treatment period. B-scan ultrasonography, electroretinogram (ERG), and histological studies by light microscopy were also performed at the end of 8 weeks. RESULTS The novel artificial vitreous body consists of a thin vitreous-like capsule with a silicone tube-valve system. The capsule can be folded and implanted into vitreous cavity through 1.5 mm incision on sclera. Physiological balanced solution (PBS) was then injected into the capsule and inflated to support retina and control intraocular pressure (IOP) through the tube-valve system subsequently fixed under the conjunctiva. Experiments using rabbits showed that the novel vitreous body could effectively support the retina and apparently induced no significant pathological changes in the eye over 8 weeks. CONCLUSION This approach may provide a new research strategy in the vitreous replacement technology. The novel artificial vitreous body device can effectively support retina, control IOP, and has good biocompatibility. It may be a good alternative to injecting artificial vitreous although its tamponade properties and usefulness still have to be proven in complex vitreoretinal diseases.
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Affiliation(s)
- Q Gao
- Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China.
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Chan EYT, Ng DKK, Chong ASF, Hui Y, Fu YM. Congenital nasal pyriform aperture stenosis with semilobar holoprosencephaly. Int J Pediatr Otorhinolaryngol 2005; 69:93-6. [PMID: 15627454 DOI: 10.1016/j.ijporl.2004.07.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2004] [Revised: 07/09/2004] [Accepted: 07/11/2004] [Indexed: 11/19/2022]
Abstract
We describe a child who has congenital nasal pyriform aperture stenosis with single maxillary central incisor, holoprosencephaly and central diabetes insipidus without any apparent anterior pituitary dysfunction. Conservative management of the congenital nasal pyriform aperture stenosis is adopted and management of diabetes insipidus is described. A literature review is undertaken.
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Affiliation(s)
- E Y T Chan
- Department of Paediatrics, Kwong Wah Hospital, Waterloo Road, Hong Kong, Kowloon, Hong Kong SAR, PR China
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Abstract
Recurrent respiratory papillomatosis (RRP) is a rare disease in children. Previous reports suggested that prematurity and early age of presentation were poor prognostic factors. We report on a 24-week premature infant who presented with stridor, weak cry, and hoarseness of voice at age 9 months (corrected age), in whom the diagnosis of RRP was not made until age 21 months (corrected age). Laser excision of RRP was subsequently performed, and the child is still surviving at age 2.5 years. RRP should be considered in the differential diagnosis of airway problems in survivors of extreme prematurity; the prognosis is not uniformly poor in premature infants.
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Affiliation(s)
- S L Lee
- Department of Paediatrics and Adolescent Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong SAR, China
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Wu JCY, Chan FKL, Ching JYL, Leung WK, Hui Y, Leong R, Chung SCS, Sung JJY. Effect of Helicobacter pylori eradication on treatment of gastro-oesophageal reflux disease: a double blind, placebo controlled, randomised trial. Gut 2004; 53:174-9. [PMID: 14724146 PMCID: PMC1774911 DOI: 10.1136/gut.2003.012641] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND The role of Helicobacter pylori eradication in the management of gastro-oesophageal reflux disease (GORD) is controversial. We hypothesised that H pylori eradication leads to worsened control of reflux disease. METHODS Consecutive patients with weekly reflux symptoms were prospectively recruited for endoscopy and symptom evaluation. Patients were enrolled if they had H pylori infection and required long term acid suppressants. Eligible patients were randomly assigned to omeprazole triple therapy (HpE group) or omeprazole with placebo antibiotics (Hp+ group) for one week. Omeprazole 20 mg daily was given for eight weeks for healing of oesophagitis and symptom relief. This was followed by a maintenance dose of 10 mg daily for up to 12 months. The primary study end point was the probability of treatment failure within 12 months, which was defined as either incomplete resolution of symptoms or oesophagitis at the initial treatment phase, or relapse of symptoms and oesophagitis during the maintenance phase. Predictors of treatment failure were determined by Cox's proportional hazards model. RESULTS A total of 236 GORD patients were screened and 113 (47.9%) were positive for H pylori; 104 (92%) patients were included in the intention to treat analysis (53 in the HpE group and 51 in the Hp+ group). Thirty one patients (30%) had erosive oesophagitis at baseline. H pylori was eradicated in 98% of the HpE group and in 3.9% of the Hp+ group. Overall, 15 patients (28.3%) in the HpE group and eight patients (15.7%) in the Hp+ group had treatment failure. The 12 month probability of treatment failure was 43.2% (95% confidence interval (CI) 29.9-56.5%) in the HpE group and 21.1% (95% CI 9.9-32.3%) in the Hp+ group (log rank test, p = 0.043). In the Cox proportional hazards model, after adjustment for the covariates age, sex, erosive oesophagitis, hiatus hernia, degree of gastritis, and severity of symptoms at baseline, H pylori eradication was the only predictor of treatment failure (adjusted hazard ratio 2.47 (95% CI 1.05-5.85)). CONCLUSION H pylori eradication leads to more resilient GORD.
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Affiliation(s)
- J C Y Wu
- Department of Medicine and Therapeutics, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong ROC.
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Ng PK, Hui Y, Lam BCC, Goh WHS, Yeung CY. Feasibility of implementing a universal neonatal hearing screening programme using distortion product otoacoustic emission detection at a university hospital in Hong Kong. Hong Kong Med J 2004; 10:6-13. [PMID: 14967849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023] Open
Abstract
OBJECTIVE To assess the feasibility of implementing a universal neonatal hearing screening programme using distortion product otoacoustic emission detection at a major teaching hospital in Hong Kong. DESIGN Descriptive study and questionnaire. SETTING. Teaching hospital, Hong Kong. METHODS A total of 1064 infants, together with their mothers, were successfully recruited for the study. The participation rate was 99.3%. A three-stage hearing screening protocol using distortion product otoacoustic emission detection was adopted. Each of the participating infants was screened on three separate occasions (day 1-4, day 5-14, and day 21-30 after birth), irrespective of the test results. A questionnaire was administered to 364 randomly selected mothers to determine whether as consumers of the hearing screening service, mothers would find screening desirable. RESULTS Results of the screening demonstrated an incidence of permanent bilateral hearing loss (>or=40 dB in the better ear) of 0.28%. The results also showed that 3.5% of the screened infants were referred for subsequent diagnostic audiological assessment, including those suspected with unilateral as well as bilateral hearing loss. Data obtained were comparable to other reported results obtained using multi-stage screening protocols. Taking both the false positive rate and the default rate into consideration, the most appropriate time for screening in this hospital setting appeared to be around day 5 to 14 when infants returned to the hospital's day centre as out-patients for routine medical follow-up. Since this day centre service is not generally provided by all maternity hospitals in Hong Kong, an alternative time for screening would be around day 21 to 30 when infants could return as out-patients solely for the hearing test. The results of the questionnaire suggested that most mothers thought a neonatal hearing screening would be desirable (91.35%). The majority (81.70%) indicated a preference for screening either within a few days of birth at the maternity ward prior to discharge from the hospital, or between 5 and 30 days when returning to the hospital as an out-patient. CONCLUSION It was concluded that a universal neonatal hearing screening programme could be readily implemented in a maternity hospital setting in Hong Kong.
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Affiliation(s)
- P K Ng
- Children's Habilitation Institute, The Duchess of Kent Children's Hospital at Sandy Bay, 12 Sandy Bay Road, Pokfulam, Hong Kong.
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Hui Y, Nip WK. New Technology, Vegetable Processing, and Microbial Inactivation. Food Science and Technology 2003. [DOI: 10.1201/9780203912911.ch31] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hui Y, Nip WK. Critical Factors in the Manufacture of Acidified Vegetables and Vegetable Products. Food Science and Technology 2003. [DOI: 10.1201/9780203912911.ch30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hui Y. Frozen French Fried Potatoes and Quality Assurance. Food Science and Technology 2003. [DOI: 10.1201/9780203912911.ch19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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