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Luan C, Lu Z, Chen J, Chen M, Zhao R, Li X. Thalidomide Alleviates Apoptosis, Oxidative Damage and Inflammation Induced by Pemphigus Vulgaris IgG in HaCat Cells and Neonatal Mice Through MyD88. Drug Des Devel Ther 2023; 17:2821-2839. [PMID: 37719363 PMCID: PMC10504907 DOI: 10.2147/dddt.s407242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 09/02/2023] [Indexed: 09/19/2023] Open
Abstract
Purpose Thalidomide (Tha) can be used as a selective treatment for mild pemphigus vulgaris (PV). However, the specific mechanism of action remains unclear. Patients and Methods PV IgG extracted from patients' serum was cocultured with HaCaT cells to construct a PV cell model, and different concentrations of Tha were used to screen the drug effect. The expression level of MYD88 was assessed in skin lesions of PV patients. Intracellular Ca2+ concentration, reactive oxygen species level, DSG3, PG, MYD88, apoptosis-related proteins (Caspase-3, Bcl-2, and Bax), NF-κB pathway-related proteins (IκBα, p-IκBα, p50, and p65), NLRP3, IFN-γ, TNF-α, IL-6, and IL-8 levels were measured. PV IgG was subcutaneously injected into C57BL/6 neonatal mice to construct the animal model. Immunofluorescence was used to detect IgG deposition in the mouse epidermis, whereas immunohistochemistry and TUNEL methods were used to detect the expression of MYD88 and NLRP3 as well as cell apoptosis level in the mouse epidermis. Results Tha reversed the decrease in Dsg3 and PG caused by PV IgG. The expression of MyD88 increased in the patients' skin, PV cell model, and PV mouse model. The increase in MyD88 expression level in PV cell models and PV newborn mouse models was inhibited by Tha. Overexpression of MyD88 induced a decrease in the expression levels of Dsg3 and PG in Hacat cells. Overexpression of MyD88 inhibited Tha effects on Dsg3 and PG expressions and blocked Tha effects on Ca2+, apoptosis, Bax, Bcl-2, and Caspase-3 expressions, oxidative damage, and inflammatory response in HaCat cells. Tha alleviated acantholysis induced by PV IgG in model mice. Conclusion Through MYD88, Tha attenuated apoptosis of HaCat cells, modulated NF-κB to hamper the oxidative damage and inflammatory response in the PV cell models, and alleviated acantholysis, IgG deposition, and epidermal cell apoptosis induced by PV IgG in model mice.
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Affiliation(s)
- Chunyan Luan
- Department of Dermatology, The Second Affiliated Hospital of Kunming Medical University, Kunming, People’s Republic of China
| | - Zhipeng Lu
- Southwest United Graduate School, Yunnan University, Kunming, Yunnan, 650500, People’s Republic of China
| | - Juan Chen
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Kunming Medical University, Kunming, People’s Republic of China
| | - Mengxing Chen
- Department of Dermatology, The Second Affiliated Hospital of Kunming Medical University, Kunming, People’s Republic of China
| | - Ran Zhao
- Department of Dermatology, The Second Affiliated Hospital of Kunming Medical University, Kunming, People’s Republic of China
| | - Xiaolan Li
- Department of Dermatology, The Second Affiliated Hospital of Kunming Medical University, Kunming, People’s Republic of China
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Abstract
Tumour necrosis factor (TNF) is a central cytokine in inflammatory reactions, and biologics that neutralize TNF are among the most successful drugs for the treatment of chronic inflammatory and autoimmune pathologies. In recent years, it became clear that TNF drives inflammatory responses not only directly by inducing inflammatory gene expression but also indirectly by inducing cell death, instigating inflammatory immune reactions and disease development. Hence, inhibitors of cell death are being considered as a new therapy for TNF-dependent inflammatory diseases.
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Zhang P, Wang W, Li M. Role and mechanism of circular RNA circ_0050486 in regulating oxidized low-density lipoprotein-induced injury in endothelial cells. Clin Hemorheol Microcirc 2022; 82:107-124. [PMID: 35723090 DOI: 10.3233/ch-211259] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Dysfunction of endothelial cells in the arterial vasculature is an essential contributor to the pathogenesis of atherosclerosis. Circular RNAs (circRNAs) exert important regulatory functions in endothelial cell dysfunction. Here, we explored the precise role and mechanism of circ_0050486 in regulating endothelial cell injury induced by oxidized low-density lipoprotein (ox-LDL). METHODS Circ_0050486, microRNA (miR)-182-5p and myeloid differentiation primary response gene 88 (MyD88) were quantified by quantitative real-time PCR or western blot. Cell viability, proliferation and apoptosis were examined by MTS, 5-Ethynyl-2'-Deoxyuridine (EdU), and flow cytometry assays, respectively. Direct relationship between miR-182-5p and circ_0050486 or MYD88 was verified by dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. RESULTS Circ_0050486 was upregulated in atherosclerosis serum and ox-LDL-treated human aortic endothelial cells (HAECs). Silencing of circ_0050486 suppressed HAEC injury induced by ox-LDL. Mechanistically, circ_0050486 targeted miR-182-5p, and the effects of circ_0050486 silencing were partially due to the upregulation of miR-182-5p. MYD88 was a direct target of miR-182-5p, and miR-182-5p-mediated inhibition of MYD88 attenuated ox-LDL-evoked HAEC injury. Circ_0050486 bound to miR-182-5p to regulate MYD88 expression. Additionally, the NF-κB signaling pathway was involved in the regulation of circ_0050486/miR-182-5p/MYD88 axis in ox-LDL-treated HAECs. CONCLUSION Our study identifies the functional role of circ_0050486 in ox-LDL-induced endogenous cell injury and establishes a mechanism of circ_0050486 function by affecting MYD88 through competitively binding to shared miR-182-5p.
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Affiliation(s)
- Pu Zhang
- Second Department of Cardiology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan, China
| | - Weiping Wang
- Second Department of Cardiology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan, China
| | - Meilan Li
- Second Department of Cardiology, The Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan, China
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Sharma BR, Karki R, Sundaram B, Wang Y, Vogel P, Kanneganti TD. The Transcription Factor IRF9 Promotes Colorectal Cancer via Modulating the IL-6/STAT3 Signaling Axis. Cancers (Basel) 2022; 14:cancers14040919. [PMID: 35205671 PMCID: PMC8869918 DOI: 10.3390/cancers14040919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/25/2022] [Accepted: 02/08/2022] [Indexed: 01/05/2023] Open
Abstract
Colorectal cancer (CRC) is a leading cause of cancer-related deaths worldwide, and innate immune responses and inflammation are known to affect the course of disease. Interferon (IFN) signaling in particular is critical for modulating inflammation-associated diseases including CRC. While the effects of IFN signaling in CRC have been studied, results have been conflicting. Furthermore, individual molecules in the IFN pathway that could be therapeutically targeted have distinct functions, with many of their diverse roles in CRC remaining unclear. Here, we found that IRF9 had an oncogenic effect in CRC; loss of IRF9 reduced tumorigenesis in both azoxymethane (AOM)/dextran sodium sulfate (DSS)-induced and spontaneous CRC models. IRF9 also reduced DSS-induced colitis and inflammation in the colon, but it had no effect on the NF-κB and MAPK signaling activation. Instead, IRF9 enhanced the transcription and production of the inflammatory cytokine IL-6. By promoting IL-6 release, IRF9 drove the activation of pro-oncogenic STAT3 signaling in the colon. Overall, our study found that IRF9 promoted the development of CRC via modulation of the IL-6/STAT3 signaling axis, identifying multiple potential targets and suggesting new therapeutic strategies for the treatment of CRC.
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Affiliation(s)
- Bhesh Raj Sharma
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (B.R.S.); (R.K.); (B.S.); (Y.W.)
| | - Rajendra Karki
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (B.R.S.); (R.K.); (B.S.); (Y.W.)
| | - Balamurugan Sundaram
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (B.R.S.); (R.K.); (B.S.); (Y.W.)
| | - Yaqiu Wang
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (B.R.S.); (R.K.); (B.S.); (Y.W.)
| | - Peter Vogel
- Animal Resources Center and the Veterinary Pathology Core, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA;
| | - Thirumala-Devi Kanneganti
- Department of Immunology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA; (B.R.S.); (R.K.); (B.S.); (Y.W.)
- Correspondence: ; Tel.: +1-901-595-3634; Fax: +1-901-595-5766
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Gomez-Diaz C, Jonsson G, Schodl K, Deszcz L, Bestehorn A, Eislmayr K, Almagro J, Kavirayani A, Seida M, Fennell LM, Hagelkruys A, Kovarik P, Penninger JM, Ikeda F. The ubiquitin ligase HOIL-1L regulates immune responses by interacting with linear ubiquitin chains. iScience 2021; 24:103241. [PMID: 34755089 PMCID: PMC8561004 DOI: 10.1016/j.isci.2021.103241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 08/30/2021] [Accepted: 10/05/2021] [Indexed: 11/28/2022] Open
Abstract
The Linear Ubiquitin Chain Assembly Complex (LUBAC), composed of HOIP, HOIL-1L, and SHARPIN, promotes tumor necrosis factor (TNF)-dependent NF-κB signaling in diverse cell types. HOIL-1L contains an Npl4 Zinc Finger (NZF) domain that specifically recognizes linear ubiquitin chains, but its physiological role in vivo has remained unclear. Here, we demonstrate that the HOIL-1L NZF domain has important regulatory functions in inflammation and immune responses in mice. We generated knockin mice (Hoil-1lT201A;R208A/T201A;R208A) expressing a HOIL-1L NZF mutant and observed attenuated responses to TNF- and LPS-induced shock, including prolonged survival, stabilized body temperature, reduced cytokine production, and liver damage markers. Cells derived from Hoil-1lT201A;R208A/T201A;R208A mice show reduced TNF-dependent NF-κB activation and incomplete recruitment of HOIL-1L into TNF Receptor (TNFR) Complex I. We further show that HOIL-1L NZF cooperates with SHARPIN to prevent TNFR-dependent skin inflammation. Collectively, our data suggest that linear ubiquitin-chain binding by HOIL-1L regulates immune responses and inflammation in vivo. An RBR-type E3 ligase HOIL-1L decodes linear ubiquitin chains via the NZF domain HOIL-1L NZF is essential for proper responses to LPS and TNF-induced shock in mice Intact HOIL-1L NZF is required for activating the TNF-induced NF-kB pathway HOIL-1L NZF cooperates with SHARPIN to control inflammation in mice
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Affiliation(s)
- Carlos Gomez-Diaz
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Gustav Jonsson
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Katrin Schodl
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Luiza Deszcz
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Annika Bestehorn
- Max Perutz Labs, University of Vienna, Vienna Biocenter (VBC), Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Kevin Eislmayr
- Max Perutz Labs, University of Vienna, Vienna Biocenter (VBC), Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Jorge Almagro
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Anoop Kavirayani
- Vienna Biocenter Core Facilities (VBCF), Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Mayu Seida
- Medical Institute of Bioregulation (MIB), Kyushu University, Fukuoka 812-8582, Japan
| | - Lilian M Fennell
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Astrid Hagelkruys
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria
| | - Pavel Kovarik
- Max Perutz Labs, University of Vienna, Vienna Biocenter (VBC), Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Josef M Penninger
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria.,Department of Medical Genetics, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Fumiyo Ikeda
- IMBA - Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna Biocenter (VBC), 1030 Vienna, Austria.,Medical Institute of Bioregulation (MIB), Kyushu University, Fukuoka 812-8582, Japan
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6
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Zhang X, Chen C, Li B, Lu W. Circ-UQCRC2 aggravates lipopolysaccharide-induced injury in human bronchial epithelioid cells via targeting miR-495-3p/MYD88-mediated inflammatory response and oxidative stress. Autoimmunity 2021; 54:483-492. [PMID: 34499003 DOI: 10.1080/08916934.2021.1975273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Infantile pneumonia is a common inflammatory disease with the infections of various pathogens in lower respiratory tracts. Here, the role and working mechanism of circular RNA (circRNA) ubiquinol-cytochrome c reductase core protein 2 (circ-UQCRC2; hsa_circ_0038467) in infantile pneumonia were investigated. Cell viability, apoptosis, and inflammatory response were assessed by 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, flow cytometry, and enzyme-linked immunosorbent assay (ELISA). Cell oxidative stress was analyzed by measuring the production of malondialdehyde (MDA) and superoxide dismutase (SOD). Reverse transcription-quantitative polymerase chain reaction (RT-qPCR) and Western blot assay were performed to determine the expression of RNAs and proteins. Dual-luciferase reporter assay and RNA immunoprecipitation (RIP) assay were performed to confirm the interaction between microRNA-495-3p (miR-495-3p) and circ-UQCRC2 or myeloid differentiation primary response protein 88 (MYD88). Lipopolysaccharide (LPS) treatment suppressed the viability while induced the apoptosis, inflammation, and oxidative stress of 16HBE cells in a dose-dependent manner. LPS exposure dose-dependently up-regulated the expression of circ-UQCRC2 in 16HBE cells. Circ-UQCRC2 absence attenuated LPS-induced injury in 16HBE cells. miR-495-3p was a target of circ-UQCRC2, and circ-UQCRC2 silencing-mediated protective effects in LPS-induced 16HBE cells were partly reversed by anti-miR-495-3p. MYD88 was a target of miR-495-3p, and MYD88 overexpression partly counteracted miR-495-3p accumulation-mediated influences in 16HBE cells upon LPS exposure. Circ-UQCRC2 interference decreased the protein expression of MYD88 partly by up-regulating miR-495-3p in LPS-induced 16HBE cells. In conclusion, circ-UQCRC2 contributed to LPS-induced injury of 16HBE cells by targeting miR-495-3p/MYD88 signalling-mediated inflammatory response and oxidative stress.
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Affiliation(s)
- Xuan Zhang
- Department of Pediatrics, The First College of Clinical Medical Science, China Three Gorges University, Yichang City, Hubei Province, China
| | - Chunbao Chen
- Department of Pediatrics, The First College of Clinical Medical Science, China Three Gorges University, Yichang City, Hubei Province, China
| | - Bei Li
- Department of Pediatrics, The First College of Clinical Medical Science, China Three Gorges University, Yichang City, Hubei Province, China
| | - Wei Lu
- Department of Pediatrics, The First College of Clinical Medical Science, China Three Gorges University, Yichang City, Hubei Province, China
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Wladis EJ, Adam AP. Immune signaling in rosacea. Ocul Surf 2021; 22:224-229. [PMID: 34481075 DOI: 10.1016/j.jtos.2021.08.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Revised: 08/24/2021] [Accepted: 08/30/2021] [Indexed: 11/29/2022]
Abstract
Rosacea is a common chronic skin disease affecting mostly people aged 40 and above, with currently no cure. When it affects the eyelids and periocular skin, it leads to dry eye and potentially corneal damage. Research performed over the last decade shed light into the potential mechanisms leading to skin hypersensitivity and provided promising avenues for development of novel, rational therapeutics aimed at reducing the skin inflammatory state. In this review, we discuss the current knowledge on the mechanisms of rosacea in general and of periocular skin-affecting disease in particular, identify key questions that remain to be answered in future research, and offer a disease model that can explain the key characteristics of this disease, with particular emphasis on a potential positive feedback loop that could explain both the acute and chronic features of rosacea.
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Affiliation(s)
- Edward J Wladis
- Lions Eye Institute, Department of Ophthalmology, Albany Medical College, 1220 New Scotland Rd, Suite 302, Slingerlands, NY, 12159, United States.
| | - Alejandro P Adam
- Department of Molecular and Cellular Physiology and Department of Ophthalmology, Albany Medical College, United States
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8
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Wu X, Tang Y, Zhang S, Zhao X, Lin X. MyD88-Dependent Signaling Is Required for HOIP Deficiency-Induced Autoinflammation. THE JOURNAL OF IMMUNOLOGY 2021; 207:542-554. [PMID: 34253576 DOI: 10.4049/jimmunol.2100173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 05/06/2021] [Indexed: 11/19/2022]
Abstract
The linear ubiquitin chain assembly complex (LUBAC) plays pivotal roles in regulating lymphocyte activation, inflammation, and cell death. This is highlighted by the fact that patients with mutations in LUBAC catalytic subunit HOIP suffer from autoinflammation combined with immunodeficiency. Although defective development of T and B cells resulting from HOIP deficiency in adaptive immunity can explain immunodeficiency, the pathogenesis of autoinflammation is not clear. In this study, we found that dendritic cell (DC)-specific deletion of HOIP resulted in spontaneous inflammation, indicating the essential role of HOIP in maintaining DC homeostasis. Although HOIP deficiency in DCs did not affect TNF-α-induced NF-κB activation, it enhanced TNF-α-induced apoptosis and necroptosis. However, crossing HoipDC KO mice with TNFR1-knockout mice surprisingly could not rescue the systematic inflammation, suggesting that the autoinflammation is not due to the effect of HOIP on TNF-α signaling. In contrast, treatment of HoipDC KO mice with antibiotics reduced the inflammation, implying that TLR signaling may contribute to the inflammatory phenotype found in HoipDC KO mice. Consistently, we found that LPS induced more cell death and significantly higher levels of IL-1α and IL-1β in HoipDC KO cells. Importantly, MyD88 deficiency rescued the inflammatory phenotype in HoipDC KO mice. Together, these findings reveal the indispensable function of HOIP in maintaining DC homeostasis, and MyD88-dependent proinflammatory signal plays a substantial role in the pathogenesis of human autoinflammation associated with HOIP mutations.
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Affiliation(s)
- Xin Wu
- Institute for Immunology, Tsinghua University School of Medicine, Beijing, China; and
| | - Yong Tang
- Institute for Immunology, Tsinghua University School of Medicine, Beijing, China; and
| | - Silin Zhang
- Institute for Immunology, Tsinghua University School of Medicine, Beijing, China; and
| | - Xueqiang Zhao
- Institute for Immunology, Tsinghua University School of Medicine, Beijing, China; and
| | - Xin Lin
- Institute for Immunology, Tsinghua University School of Medicine, Beijing, China; and .,Tsinghua-Peking Center for Life Sciences, Beijing, China
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9
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Karki R, Kanneganti TD. The 'cytokine storm': molecular mechanisms and therapeutic prospects. Trends Immunol 2021; 42:681-705. [PMID: 34217595 DOI: 10.1016/j.it.2021.06.001] [Citation(s) in RCA: 158] [Impact Index Per Article: 52.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/09/2021] [Accepted: 06/10/2021] [Indexed: 12/15/2022]
Abstract
Cytokine storm syndrome (CSS) has generally been described as a collection of clinical manifestations resulting from an overactivated immune system. Cytokine storms (CSs) are associated with various pathologies, as observed in infectious diseases, certain acquired or inherited immunodeficiencies and autoinflammatory diseases, or following therapeutic interventions. Despite the role of CS in tissue damage and multiorgan failure, a systematic understanding of its underlying molecular mechanisms is lacking. Recent studies demonstrate a positive feedback loop between cytokine release and cell death pathways; certain cytokines, pathogen-associated molecular patterns (PAMPs), and damage-associated molecular patterns (DAMPs), can activate inflammatory cell death, leading to further cytokine secretion. Here, we discuss recent progress in innate immunity and inflammatory cell death, providing insights into the cellular and molecular mechanisms of CSs and therapeutics that might quell ensuing life-threatening effects.
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Affiliation(s)
- Rajendra Karki
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, USA
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10
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Wladis EJ, Arunachalam T, LaJoie JE, Lau KW, Adam AP. Myeloid differentiation factor 88 expression in eyelid specimens of rosacea. Orbit 2021; 41:329-334. [PMID: 33789561 DOI: 10.1080/01676830.2021.1905668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Purpose: Rosacea is a common cause of ocular surface disease. Specific immunologic features have been implicated in its pathogenesis, including toll-like receptors, mitogen-associated kinase, and nuclear factor kappa-B. Myeolid differentiation factor 88 (MYD88) has been associated with these elements, suggesting a role for this protein in rosacea. This study was designed to compare the expression of MYD88 in the eyelids of patients with and without this disease.Methods: Western blotting for MYD88 was performed in 14 control patients and 15 patients with rosacea. Bands were quantified and normalized to actin. Immunohistochemical staining for MYD88 was performed in a different cohort of 12 patients with rosacea and 12 controls, and positively-staining cells were counted across five consecutive 40x fields. Statistical analyses compared the differences between the two groups via a dedicated software package.Results: On western blotting, the mean ratios of MYD88 to actin were 13.8 (standard deviation = 14.1) and 44.3 (standard deviation = 39.6) in control and rosacea patients, respectively (p = .002). On immunohistochemistry, the mean numbers of positively-staining cells were 12.1/40x field (standard deviation = 9.61/40x field) and 27.4/40x (standard deviation = 18.7/40x field) in control and rosacea patients, respectively (p = .0438).Conclusions: MYD88 is enriched in eyelid specimens of rosacea. This finding further implicates the innate immune system in the pathogenesis of rosacea, and is consistent with previous reports regarding the role of this protein in ocular surface disease and the previously-implicated cellular features of the disease. Inhibition of MYD88 may be a successful treatment strategy to manage rosacea.
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Affiliation(s)
- Edward J Wladis
- Ophthalmic Plastic Surgery, Department of Ophthalmology, Albany Medical College, Lions Eye Institute, Albany, New York, USA
| | - Thilaka Arunachalam
- Ophthalmic Plastic Surgery, Department of Ophthalmology, Albany Medical College, Lions Eye Institute, Albany, New York, USA
| | - Juliann E LaJoie
- Ophthalmic Plastic Surgery, Department of Ophthalmology, Albany Medical College, Lions Eye Institute, Albany, New York, USA
| | - Kevin W Lau
- Ophthalmic Plastic Surgery, Department of Ophthalmology, Albany Medical College, Lions Eye Institute, Albany, New York, USA
| | - Alejandro P Adam
- Ophthalmic Plastic Surgery, Department of Ophthalmology, Albany Medical College, Lions Eye Institute, Albany, New York, USA.,Center for Molecular Physiology, Albany Medical College, Albany, New York, USA
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11
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Zhang L, Liu Q, Liu KW, Qin ZY, Zhu GX, Shen LT, Zhang N, Liu BY, Che LR, Li JY, Wang T, Wen LZ, Liu KJ, Guo Y, Yin XR, Wang XW, Zhou ZH, Xiao HL, Cui YH, Bian XW, Lan CH, Chen D, Wang B. SHARPIN stabilizes β-catenin through a linear ubiquitination-independent manner to support gastric tumorigenesis. Gastric Cancer 2021; 24:402-416. [PMID: 33159601 DOI: 10.1007/s10120-020-01138-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 10/19/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Aberrant activation of Wnt/β-catenin signaling by dysregulated post-translational protein modifications, especially ubiquitination is causally linked to cancer development and progression. Although Lys48-linked ubiquitination is known to regulate Wnt/β-catenin signaling, it remains largely obscure how other types of ubiquitination, such as linear ubiquitination governs its signaling activity. METHODS The expression and regulatory mechanism of linear ubiquitin chain assembly complex (LUBAC) on Wnt/β-catenin signaling was examined by immunoprecipitation, western blot and immunohistochemical staining. The ubiquitination status of β-catenin was detected by ubiquitination assay. The impacts of SHARPIN, a core component of LUBAC on malignant behaviors of gastric cancer cells were determined by various functional assays in vitro and in vivo. RESULTS Unlike a canonical role in promoting linear ubiquitination, SHARPIN specifically interacts with β-catenin to maintain its protein stability. Mechanistically, SHARPIN competes with the E3 ubiquitin ligase β-Trcp1 for β-catenin binding, thereby decreasing β-catenin ubiquitination levels to abolish its proteasomal degradation. Importantly, SHARPIN is required for invasiveness and malignant growth of gastric cancer cells in vitro and in vivo, a function that is largely dependent on its binding partner β-catenin. In line with these findings, elevated expression of SHARPIN in gastric cancer tissues is associated with disease malignancy and correlates with β-catenin expression levels. CONCLUSIONS Our findings reveal a novel molecular link connecting linear ubiquitination machinery and Wnt/β-catenin signaling via SHARPIN-mediated stabilization of β-catenin. Targeting the linear ubiquitination-independent function of SHARPIN could be exploited to inhibit the hyperactive β-catenin signaling in a subset of human gastric cancers.
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Affiliation(s)
- Liang Zhang
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Qin Liu
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Ke-Wei Liu
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Zhong-Yi Qin
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Guang-Xi Zhu
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Li-Ting Shen
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Ni Zhang
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Bi-Ying Liu
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Lin-Rong Che
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Jin-Yang Li
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Tao Wang
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Liang-Zhi Wen
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Kai-Jun Liu
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Yan Guo
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Xin-Ru Yin
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Xing-Wei Wang
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - Zhi-Hua Zhou
- Department of Pathology, The 904 Hospital of People Liberation Army, Wuxi, People's Republic of China
| | - Hua-Liang Xiao
- Department of Pathology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China
| | - You-Hong Cui
- Institute of Pathology and Southwest Cancer Center, Key Laboratory of Tumor Immunopathology of Ministry of Education of China, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, People's Republic of China
| | - Xiu-Wu Bian
- Institute of Pathology and Southwest Cancer Center, Key Laboratory of Tumor Immunopathology of Ministry of Education of China, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, People's Republic of China
| | - Chun-Hui Lan
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China.
| | - Dongfeng Chen
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China.
| | - Bin Wang
- Department of Gastroenterology, Daping Hospital, Army Medical University (Third Military Medical University), Chongqing, 400042, People's Republic of China. .,Institute of Pathology and Southwest Cancer Center, Key Laboratory of Tumor Immunopathology of Ministry of Education of China, Southwest Hospital, Army Medical University (Third Military Medical University), Chongqing, 400038, People's Republic of China.
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12
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Tartey S, Neale G, Vogel P, Malireddi RKS, Kanneganti TD. A MyD88/IL1R Axis Regulates PD-1 Expression on Tumor-Associated Macrophages and Sustains Their Immunosuppressive Function in Melanoma. Cancer Res 2021; 81:2358-2372. [PMID: 33619117 DOI: 10.1158/0008-5472.can-20-3510] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2020] [Revised: 12/22/2020] [Accepted: 02/18/2021] [Indexed: 11/16/2022]
Abstract
Macrophages are critical mediators of tissue homeostasis, cell proliferation, and tumor metastasis. Tumor-associated macrophages (TAM) are generally associated with tumor-promoting immunosuppressive functions in solid tumors. Here, we examined the transcriptional landscape of adaptor molecules downstream of Toll-like receptors in human cancers and found that higher expression of MYD88 correlated with tumor progression. In murine melanoma, MyD88, but not Trif, was essential for tumor progression, angiogenesis, and maintaining the immunosuppressive phenotype of TAMs. In addition, MyD88 expression in myeloid cells drove melanoma progression. The MyD88/IL1 receptor (IL1R) axis regulated programmed cell death (PD)-1 expression on TAMs by promoting recruitment of NF-κBp65 to the Pdcd1 promoter. Furthermore, a combinatorial immunotherapy approach combining the MyD88 inhibitor with anti-PD-1 blockade elicited strong antitumor effects. Thus, the MyD88/IL1R axis maintains the immunosuppressive function of TAMs and promotes tumor growth by regulating PD-1 expression. SIGNIFICANCE: These findings indicate that MyD88 regulates TAM-immunosuppressive activity, suggesting that macrophage-mediated immunotherapy combining MYD88 inhibitors with PD-1 blockade could result in better treatment outcomes in a wide variety of cancers. GRAPHICAL ABSTRACT: http://cancerres.aacrjournals.org/content/canres/81/9/2358/F1.large.jpg.
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Affiliation(s)
- Sarang Tartey
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Geoffrey Neale
- Hartwell Center for Bioinformatics and Biotechnology, St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Peter Vogel
- Animal Resources Center and the Veterinary Pathology Core, St. Jude Children's Research Hospital, Memphis, Tennessee
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13
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Yan J, Yang F, Wang D, Lu Y, Liu L, Wang Z. MicroRNA-217 modulates inflammation, oxidative stress, and lung injury in septic mice via SIRT1. Free Radic Res 2020; 55:1-10. [PMID: 33207945 DOI: 10.1080/10715762.2020.1852234] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Inflammation and oxidative stress contribute to the initiation and progression of septic lung injury. MicroRNA-217 (miR-217) is proved to be involved in controlling inflammatory response and oxidative stress, yet its role and underlying mechanism in the pathogenesis of septic lung injury remain elusive. Caecal ligation and puncture surgery were performed to generate sepsis in vivo and mice were kept for 12 h to imitate septic lung injury. Next, mice were administrated with miR-217 antagomir or agomir to decrease or increase the expression of miR-217 in lung tissue. Moreover, primary peritoneal macrophages were separated and incubated with lipopolysaccharide (LPS) to further verify the role of miR-217 in vitro. miR-217 was upregulated in septic lungs and primary macrophages. miR-217 antagomir alleviated, whereas miR-217 agomir aggravated inflammation and oxidative stress in septic mice and LPS-stimulated macrophages. Further detection identified SIRT1 was responsible for miR-217 antagomir-mediated anti-inflammatory and anti-oxidant effects, and SIRT1 inhibition abolished the beneficial effects of miR-217 antagomir in vivo and in vitro. Our data defined miR-217 as a therapeutic target for treating septic lung injury.
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Affiliation(s)
- Jie Yan
- Department of Thoracic and Cardiovascular Surgery, Huangshi Central Hospital (Affiliated Hospital of Hubei Polytechnic University), Edong Healthcare Group, Huangshi, Hubei, China
| | - Fan Yang
- Department of Thoracic and Cardiovascular Surgery, Huangshi Central Hospital (Affiliated Hospital of Hubei Polytechnic University), Edong Healthcare Group, Huangshi, Hubei, China
| | - Dengyun Wang
- Department of Thoracic and Cardiovascular Surgery, Huangshi Central Hospital (Affiliated Hospital of Hubei Polytechnic University), Edong Healthcare Group, Huangshi, Hubei, China
| | - Yuan Lu
- Department of Thoracic and Cardiovascular Surgery, Huangshi Central Hospital (Affiliated Hospital of Hubei Polytechnic University), Edong Healthcare Group, Huangshi, Hubei, China
| | - Li Liu
- Department of Thoracic and Cardiovascular Surgery, Huangshi Central Hospital (Affiliated Hospital of Hubei Polytechnic University), Edong Healthcare Group, Huangshi, Hubei, China
| | - Zhengjun Wang
- Department of Thoracic and Cardiovascular Surgery, Huangshi Central Hospital (Affiliated Hospital of Hubei Polytechnic University), Edong Healthcare Group, Huangshi, Hubei, China
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14
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Place DE, Kanneganti TD. The innate immune system and cell death in autoinflammatory and autoimmune disease. Curr Opin Immunol 2020; 67:95-105. [PMID: 33242752 DOI: 10.1016/j.coi.2020.10.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 10/09/2020] [Accepted: 10/23/2020] [Indexed: 12/16/2022]
Abstract
The innate immune system, the first line of defense against pathogens and host tissue damage, initiates pro-inflammatory responses which, when dysregulated, promote inflammation to drive a broad range of autoimmune diseases. Immunomodulatory therapies have been developed to successfully treat several autoimmune diseases, but still many others lack effective treatments. Here, we explore recent advances in how the innate immune system contributes to autoinflammation, from the innate immune sensors that initiate immune responses to how this system regulates the activation of programmed cell death pathways including pyroptosis, apoptosis, necroptosis, and PANoptosis, which involves machinery from the pyroptotic, apoptotic, and necroptotic pathways. Recent advances in our understanding of innate immunity raise important considerations for developing new inflammatory disease treatments that target innate immune signaling and programmed cell death pathways.
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Affiliation(s)
- David E Place
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, 38105, USA
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15
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Sundberg JP, Pratt CH, Goodwin LP, Silva KA, Kennedy VE, Potter CS, Dunham A, Sundberg BA, HogenEsch H. Keratinocyte-specific deletion of SHARPIN induces atopic dermatitis-like inflammation in mice. PLoS One 2020; 15:e0235295. [PMID: 32687504 PMCID: PMC7371178 DOI: 10.1371/journal.pone.0235295] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 06/12/2020] [Indexed: 12/30/2022] Open
Abstract
Spontaneous mutations in the SHANK-associated RH domain interacting protein (Sharpin) resulted in a severe autoinflammatory type of chronic proliferative dermatitis, inflammation in other organs, and lymphoid organ defects. To determine whether cell-type restricted loss of Sharpin causes similar lesions, a conditional null mutant was created. Ubiquitously expressing cre-recombinase recapitulated the phenotype seen in spontaneous mutant mice. Limiting expression to keratinocytes (using a Krt14-cre) induced a chronic eosinophilic dermatitis, but no inflammation in other organs or lymphoid organ defects. The dermatitis was associated with a markedly increased concentration of serum IgE and IL18. Crosses with S100a4-cre resulted in milder skin lesions and moderate to severe arthritis. This conditional null mutant will enable more detailed studies on the role of SHARPIN in regulating NFkB and inflammation, while the Krt14-Sharpin-/- provides a new model to study atopic dermatitis.
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Affiliation(s)
- John P. Sundberg
- The Jackson Laboratory, Bar Harbor, ME, United States of America
| | - C. Herbert Pratt
- The Jackson Laboratory, Bar Harbor, ME, United States of America
| | | | | | | | | | - Anisa Dunham
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, United States of America
| | - Beth A. Sundberg
- The Jackson Laboratory, Bar Harbor, ME, United States of America
| | - Harm HogenEsch
- The Jackson Laboratory, Bar Harbor, ME, United States of America
- Department of Comparative Pathobiology, College of Veterinary Medicine, Purdue University, West Lafayette, IN, United States of America
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16
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Karki R, Sharma BR, Lee E, Banoth B, Malireddi RKS, Samir P, Tuladhar S, Mummareddy H, Burton AR, Vogel P, Kanneganti TD. Interferon regulatory factor 1 regulates PANoptosis to prevent colorectal cancer. JCI Insight 2020; 5:136720. [PMID: 32554929 DOI: 10.1172/jci.insight.136720] [Citation(s) in RCA: 120] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 05/20/2020] [Indexed: 12/11/2022] Open
Abstract
Interferon regulatory factor 1 (IRF1) regulates diverse biological functions, including modulation of cellular responses involved in tumorigenesis. Genetic mutations and altered IRF1 function are associated with several cancers. Although the function of IRF1 in the immunobiology of cancer is emerging, IRF1-specific mechanisms regulating tumorigenesis and tissue homeostasis in vivo are not clear. Here, we found that mice lacking IRF1 were hypersusceptible to colorectal tumorigenesis. IRF1 functions in both the myeloid and epithelial compartments to confer protection against AOM/DSS-induced colorectal tumorigenesis. We further found that IRF1 also prevents tumorigenesis in a spontaneous mouse model of colorectal cancer. The attenuated cell death in the colons of Irf1-/- mice was due to defective pyroptosis, apoptosis, and necroptosis (PANoptosis). IRF1 does not regulate inflammation and the inflammasome in the colon. Overall, our study identified IRF1 as an upstream regulator of PANoptosis to induce cell death during colitis-associated tumorigenesis.
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Affiliation(s)
- Rajendra Karki
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Bhesh Raj Sharma
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Ein Lee
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.,Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, Tennessee, USA
| | - Balaji Banoth
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - R K Subbarao Malireddi
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Parimal Samir
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Shraddha Tuladhar
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Harisankeerth Mummareddy
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.,Emory College of Arts and Sciences, Emory University, Atlanta, Georgia, USA
| | - Amanda R Burton
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Peter Vogel
- Animal Resources Center and Veterinary Pathology Core, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
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17
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Oikawa D, Sato Y, Ito H, Tokunaga F. Linear Ubiquitin Code: Its Writer, Erasers, Decoders, Inhibitors, and Implications in Disorders. Int J Mol Sci 2020; 21:ijms21093381. [PMID: 32403254 PMCID: PMC7246992 DOI: 10.3390/ijms21093381] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/01/2020] [Accepted: 05/06/2020] [Indexed: 12/12/2022] Open
Abstract
The linear ubiquitin chain assembly complex (LUBAC) is a ubiquitin ligase composed of the Heme-oxidized IRP2 ubiquitin ligase-1L (HOIL-1L), HOIL-1L-interacting protein (HOIP), and Shank-associated RH domain interactor (SHARPIN) subunits. LUBAC specifically generates the N-terminal Met1-linked linear ubiquitin chain and regulates acquired and innate immune responses, such as the canonical nuclear factor-κB (NF-κB) and interferon antiviral pathways. Deubiquitinating enzymes, OTULIN and CYLD, physiologically bind to HOIP and control its function by hydrolyzing the linear ubiquitin chain. Moreover, proteins containing linear ubiquitin-specific binding domains, such as NF-κB-essential modulator (NEMO), optineurin, A20-binding inhibitors of NF-κB (ABINs), and A20, modulate the functions of LUBAC, and the dysregulation of the LUBAC-mediated linear ubiquitination pathway induces cancer and inflammatory, autoimmune, and neurodegenerative diseases. Therefore, inhibitors of LUBAC would be valuable to facilitate investigations of the molecular and cellular bases for LUBAC-mediated linear ubiquitination and signal transduction, and for potential therapeutic purposes. We identified and characterized α,β-unsaturated carbonyl-containing chemicals, named HOIPINs (HOIP inhibitors), as LUBAC inhibitors. We summarize recent advances in elucidations of the pathophysiological functions of LUBAC-mediated linear ubiquitination and identifications of its regulators, toward the development of LUBAC inhibitors.
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Affiliation(s)
- Daisuke Oikawa
- Department of Pathobiochemistry, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan;
| | - Yusuke Sato
- Center for Research on Green Sustainable Chemistry, Tottori University, Tottori 680-8552, Japan;
| | - Hidefumi Ito
- Department of Neurology, Faculty of Medicine, Wakayama Medical University, Wakayama 641-8510, Japan;
| | - Fuminori Tokunaga
- Department of Pathobiochemistry, Graduate School of Medicine, Osaka City University, Osaka 545-8585, Japan;
- Correspondence: ; Tel.: +81-6-6645-3720
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18
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Karki R, Lee E, Sharma BR, Banoth B, Kanneganti TD. IRF8 Regulates Gram-Negative Bacteria-Mediated NLRP3 Inflammasome Activation and Cell Death. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2020; 204:2514-2522. [PMID: 32205422 PMCID: PMC7291389 DOI: 10.4049/jimmunol.1901508] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 02/24/2020] [Indexed: 11/19/2022]
Abstract
Inflammasomes are intracellular signaling complexes that are assembled in response to a variety of pathogenic or physiologic stimuli to initiate inflammatory responses. Ubiquitously present LPS in Gram-negative bacteria induces NLRP3 inflammasome activation that requires caspase-11. We have recently demonstrated that IFN regulatory factor (IRF) 8 was dispensable for caspase-11-mediated NLRP3 inflammasome activation during LPS transfection; however, its role in Gram-negative bacteria-mediated NLRP3 inflammasome activation remains unknown. In this study, we found that IRF8 promotes NLRP3 inflammasome activation in murine bone marrow-derived macrophages (BMDMs) infected with Gram-negative bacteria such as Citrobacter rodentium, Escherichia coli, or Pseudomonas aeruginosa mutant strain ΔpopB Moreover, BMDMs deficient in IRF8 showed substantially reduced caspase-11 activation and gasdermin D cleavage, which are required for NLRP3 inflammasome activation. Mechanistically, IRF8-mediated phosphorylation of IRF3 was required for Ifnb transcription, which in turn triggered the caspase-11-dependent NLRP3 inflammasome activation in the infected BMDMs. Overall, our findings suggest that IRF8 promotes NLRP3 inflammasome activation during infection with Gram-negative bacteria.
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Affiliation(s)
- Rajendra Karki
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105; and
| | - Ein Lee
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105; and
- Integrated Biomedical Sciences Program, University of Tennessee Health Science Center, Memphis, TN 38163
| | - Bhesh R Sharma
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105; and
| | - Balaji Banoth
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105; and
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19
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Zhou D, Zhang M, Min L, Jiang K, Jiang Y. Cerebral ischemia-reperfusion is modulated by macrophage-stimulating 1 through the MAPK-ERK signaling pathway. J Cell Physiol 2020; 235:7067-7080. [PMID: 32017081 DOI: 10.1002/jcp.29603] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Accepted: 01/22/2020] [Indexed: 01/04/2023]
Abstract
Cerebral ischemia-reperfusion (IR) injury is associated with mitochondrial damage. Macrophage-stimulating 1 (MST1) reportedly stimulates mitochondrial apoptosis by suppressing BCL-2. We investigated whether MST1 promotes the progression of cerebral IR injury by inducing mitochondrial dysfunction in vivo and in vitro. Western blot analysis, quantitative polymerase chain reaction, immunofluorescence, and mitochondrial function assays were conducted in cells from wild-type and Mst1-knockout mice subjected to cerebral IR injury. MST1 expression in wild-type glial cells increased following cerebral IR injury. Cerebral IR injury reduced the mitochondrial membrane potential and mitochondrial metabolism in glial cells, while it enhanced mitochondrial reactive oxygen species generation and mitochondrial calcium levels in these cells. The deletion of Mst1 attenuated cerebral IR injury by improving mitochondrial function and reducing mitochondrial damage. The mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK/ERK) pathway was suppressed in wild-type glial cell upon cerebral IR injury but was reactivated in Mst1-knockout glial cell. Accordingly, blocking the MAPK/ERK pathway abolished the beneficial effects of Mst1 deletion during cerebral IR injury by inducing mitochondrial damage in glial cells. Our results suggest that cerebral IR injury is associated with MST1 upregulation in the brain, while the genetic ablation of Mst1 can attenuate mitochondrial damage and sustain brain function following cerebral IR injury.
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Affiliation(s)
- Dingzhou Zhou
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Mingming Zhang
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Liu Min
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Kaiyuan Jiang
- Department of Neurosurgery, The Central Hospital of Shaoyang, Shaoyang, Hunan, China
| | - Yugang Jiang
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
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20
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Zhang M, Zhou D, Ouyang Z, Yu M, Jiang Y. Sphingosine kinase 1 promotes cerebral ischemia-reperfusion injury through inducing ER stress and activating the NF-κB signaling pathway. J Cell Physiol 2020; 235:6605-6614. [PMID: 31985036 DOI: 10.1002/jcp.29546] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 01/15/2020] [Indexed: 01/02/2023]
Abstract
Endoplasm reticulum stress and inflammation response have been found to be linked to cerebral ischemia-reperfusion (IR) injury. Sphingosine kinase 1 (SPHK1) has been reported to be a novel endoplasm reticulum regulator. The aim of our study is to figure out the role of SPHK1 in cerebral IR injury and verify whether it has an ability to regulate inflammation and endoplasm reticulum stress. Hydrogen peroxide was used to induce cerebral IR injury. Enzyme-linked immunosorbent assay, quantitative polymerase chain reaction, western blots, and immunofluorescence were used to measure the alterations of cell viability, inflammation response, and endoplasm reticulum stress. The results demonstrated that after exposure to hydrogen peroxide, cell viability was reduced whereas SPHK1 expression was significantly elevated. Knockdown of SPHK1 attenuated hydrogen peroxide-mediated cell death and reversed cell viability. Our data also demonstrated that SPHK1 deletion reduced endoplasm reticulum stress and alleviated inflammation response in hydrogen peroxide-treated cells. In addition, we also found that SHPK1 modulated endoplasm reticulum stress and inflammation response to through the NF-κB signaling pathway. Inhibition of NF-κB signaling pathway has similar results when compared with the cells with SPHK1 deletion. Altogether, our results demonstrated that SPHK1 upregulation, induced by hydrogen peroxide, is responsible for cerebral IR injury through inducing endoplasm reticulum stress and inflammation response in a manner working through the NF-κB signaling pathway. This finding provides new insight into the molecular mechanism to explain the neuron death induced by cerebral IR injury.
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Affiliation(s)
- Mingming Zhang
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Dingzhou Zhou
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhu Ouyang
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Mengqiang Yu
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yugang Jiang
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
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21
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Ouyang H, Li Q, Zhong J, Xia F, Zheng S, Lu J, Deng Y, Hu Y. Combination of melatonin and irisin ameliorates lipopolysaccharide-induced cardiac dysfunction through suppressing the Mst1-JNK pathways. J Cell Physiol 2020; 235:6647-6659. [PMID: 31976559 DOI: 10.1002/jcp.29561] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 01/13/2020] [Indexed: 12/15/2022]
Abstract
Despite significant advances in therapies in past decades, the mortality rate of septic cardiomyopathy remains high. The aim of this study is to explore the therapeutic effects of combined treatment using melatonin and irisin in a mouse model of lipopolysaccharide (LPS)-mediated septic cardiomyopathy. Our data found that melatonin and irisin could further attenuate LPS-induced myocardial depression. Molecular investigation illustrated that melatonin and irisin cotreatment sustained cardiomyocyte viability and improved mitochondrial function under LPS stress. Pathway analysis demonstrated that macrophage-stimulating 1 (Mst1), which was significantly activated by LPS, was drastically inhibited by melatonin/irisin cotreatment. Mechanically, Mst1 activated c-Jun N-terminal kinase (JNK) pathway and the latter induced oxidative stress, adenosine triphosphate metabolism disorder, mitochondrial membrane potential reduction, and cardiomyocyte death activation. Melatonin and irisin cotreatment effectively inhibited the Mst1-JNK pathway and, thus, promoted cardiomyocyte survival and mitochondrial homeostasis. Interestingly, Mst1 overexpression abolished the beneficial effects of melatonin and irisin in vivo and in vitro. Altogether, our results confirmed that melatonin and irisin combination treatment could protect heart against sepsis-induced myocardial depression via modulating the Mst1-JNK pathways.
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Affiliation(s)
- Haichun Ouyang
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, Guangdong, China
| | - Qian Li
- Department of Emergency Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jiankai Zhong
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, Guangdong, China
| | - Fengfan Xia
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, Guangdong, China
| | - Sulin Zheng
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, Guangdong, China
| | - Jianhua Lu
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, Guangdong, China
| | - Yuanyan Deng
- Department of Cardiology, Integrated Hospital of Traditional Chinese Medicine, Southern Medical University, Guangzhou, China
| | - Yunzhao Hu
- Department of Cardiology, Shunde Hospital, Southern Medical University (The First People's Hospital of Shunde Foshan), Foshan, Guangdong, China
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22
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Dasari TK, Geiger R, Karki R, Banoth B, Sharma BR, Gurung P, Burton A, Kanneganti TD. The nonreceptor tyrosine kinase SYK drives caspase-8/NLRP3 inflammasome-mediated autoinflammatory osteomyelitis. J Biol Chem 2019; 295:3394-3400. [PMID: 31719149 DOI: 10.1074/jbc.ra119.010623] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2019] [Revised: 11/05/2019] [Indexed: 12/31/2022] Open
Abstract
Chronic recurrent multifocal osteomyelitis (CRMO) in humans can be modeled in Pstpip2cmo mice, which carry a missense mutation in the proline-serine-threonine phosphatase-interacting protein 2 (Pstpip2) gene. As cmo disease in mice, the experimental model analogous to human CRMO, is mediated specifically by IL-1β and not by IL-1α, delineating the molecular pathways contributing to pathogenic IL-1β production is crucial to developing targeted therapies. In particular, our earlier findings support redundant roles of NLR family pyrin domain-containing 3 (NLRP3) and caspase-1 with caspase-8 in instigating cmo However, the signaling components upstream of caspase-8 and pro-IL-1β cleavage in Pstpip2cmo mice are not well-understood. Therefore, here we investigated the signaling pathways in these mice and discovered a central role of a nonreceptor tyrosine kinase, spleen tyrosine kinase (SYK), in mediating osteomyelitis. Using several mutant mouse strains, immunoblotting, and microcomputed tomography, we demonstrate that absent in melanoma 2 (AIM2), receptor-interacting serine/ threonine protein kinase 3 (RIPK3), and caspase recruitment domain-containing protein 9 (CARD9) are each dispensable for osteomyelitis induction in Pstpip2cmo mice, whereas genetic deletion of Syk completely abrogates the disease phenotype. We further show that SYK centrally mediates signaling upstream of caspase-1 and caspase-8 activation and principally up-regulates NF-κB and IL-1β signaling in Pstpip2cmo mice, thereby inducing cmo These results provide a rationale for directly targeting SYK and its downstream signaling components in CRMO.
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Affiliation(s)
- Tejasvi K Dasari
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105; School of Medicine, Baylor College of Medicine, Houston, Texas 77030
| | - Rechel Geiger
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Rajendra Karki
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Balaji Banoth
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Bhesh Raj Sharma
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
| | - Prajwal Gurung
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105; Inflammation Program, University of Iowa, Iowa City, Iowa 52241
| | - Amanda Burton
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105
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23
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Tian Z, Tang J, Yang Q, Li X, Zhu J, Wu G. Atypical ubiquitin-binding protein SHARPIN promotes breast cancer progression. Biomed Pharmacother 2019; 119:109414. [DOI: 10.1016/j.biopha.2019.109414] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 01/16/2023] Open
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Tartey S, Kanneganti TD. Inflammasomes in the pathophysiology of autoinflammatory syndromes. J Leukoc Biol 2019; 107:379-391. [PMID: 31608507 DOI: 10.1002/jlb.3mir0919-191r] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 09/17/2019] [Accepted: 09/23/2019] [Indexed: 12/15/2022] Open
Abstract
Inflammasomes are a specialized group of intracellular sensors that are key components of the host innate immune system. Autoinflammatory diseases are disorders of the innate immune system that are characterized by recurrent inflammation and serious complications. Dysregulation of the inflammasome is associated with the onset and progression of several autoinflammatory and autoimmune diseases, including cryopyrin-associated periodic fever syndrome, familial Mediterranean fever, rheumatoid arthritis, and systemic lupus erythematosus. In this review, we discuss the involvement of various inflammasome components in the regulation of autoinflammatory disorders and describe the manifestations of these autoinflammatory diseases caused by inflammasome activation.
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Affiliation(s)
- Sarang Tartey
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
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25
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Xie Z, Zhou Y, Duan X, Yang L. Inhibitory effect of Tanshinone IIA on inverted formin-2 protects HaCaT cells against oxidative injury via regulating mitochondrial stress. J Recept Signal Transduct Res 2019; 39:134-145. [PMID: 31354004 DOI: 10.1080/10799893.2019.1638402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zhiyin Xie
- Department of Dermatology, Beijing Changping Hospital of Traditional Chinese Medicine, Beijing, China
| | - Yu Zhou
- Department of Dermatology, Beijing Changping Hospital of Traditional Chinese Medicine, Beijing, China
| | - Xingwu Duan
- Department of Dermatology, Dongzhimen Hospital, Affiliated to Beijing University of Traditional Chinese Medicine, Beijing, China
| | - Lirong Yang
- Infirmary of Shahe Campus, Central University of Finance and Economics, Beijing, China
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Liu Y, Fu Y, Hu X, Chen S, Miao J, Wang Y, Zhou Y, Zhang Y. Caveolin-1 knockdown increases the therapeutic sensitivity of lung cancer to cisplatin-induced apoptosis by repressing Parkin-related mitophagy and activating the ROCK1 pathway. J Cell Physiol 2019; 235:1197-1208. [PMID: 31270811 DOI: 10.1002/jcp.29033] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 06/12/2019] [Indexed: 12/12/2022]
Abstract
Chemotherapy is the first-line treatment option for patients with lung cancer. However, therapeutic resistance occurs through an incompletely understood mechanism. Our research wants to investigate the influence of Caveolin-1 (Cav-1) on the therapeutic sensitivity of lung cancer in vitro. Results in this study demonstrated that Cav-1 levels were markedly inhibited in A549 lung cancer cells after exposure to cisplatin. Knockdown of caveolin further enhanced cisplatin-triggered cancer death in A549 cells. The functional investigation demonstrated that Cav-1 inhibition amplified the mitochondrial stress signaling induced by cisplatin, as evidenced by the mitochondrial reactive oxygen species burst, cellular metabolic disruption, mitochondrial membrane potential reduction, and mitochondrial caspase-9-related apoptosis activation. At the molecular level, cav-1 augmented cisplatin-mediated mitochondrial damage by inhibiting Parkin-related mitochondrial autophagy. Mitophagy activation effectively attenuated the promotive impact of Cav-1 knockdown on mitochondrial damage and cell death. Furthermore, our data indicated that Cav-1 affected Parkin-related mitophagy by activating the Rho-associated coiled-coil kinase 1 (ROCK1) pathway; inhibition of the ROCK1 axis prevented cav-1 knockdown-mediated cell death and mitochondrial damage. Taken together, our results provide ample data illuminate the necessary action exerted by Cav-1 on affecting cisplatin-related therapeutic resistance. Silencing of Cav-1 inhibited Parkin-related mitophagy, thus amplifying cisplatin-mediated mitochondrial apoptotic signaling. This finding identifies the Cav-1/ROCK1/Parkin/mitophagy axis as a potential target to overcome cisplatin-related resistance in lung cancer cells.
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Affiliation(s)
- Yi Liu
- Department of Thoracic Surgery, Beijing Chaoyang Hospital, Beijing, Chaoyang, China
| | - Yili Fu
- Department of Thoracic Surgery, Beijing Chaoyang Hospital, Beijing, Chaoyang, China
| | - Xianoxing Hu
- Department of Thoracic Surgery, Beijing Chaoyang Hospital, Beijing, Chaoyang, China
| | - Shuo Chen
- Department of Thoracic Surgery, Beijing Chaoyang Hospital, Beijing, Chaoyang, China
| | - Jinbai Miao
- Department of Thoracic Surgery, Beijing Chaoyang Hospital, Beijing, Chaoyang, China
| | - Yang Wang
- Department of Thoracic Surgery, Beijing Chaoyang Hospital, Beijing, Chaoyang, China
| | - Ying Zhou
- Department of Pulmonary and Critical Care Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, Yangpu, China
| | - Yuan Zhang
- Department of Pulmonary and Critical Care Medicine, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai, Yangpu, China
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27
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Fan J, Zhu Q, Wu Z, Ding J, Qin S, Liu H, Miao P. Protective effects of irisin on hypoxia-reoxygenation injury in hyperglycemia-treated cardiomyocytes: Role of AMPK pathway and mitochondrial protection. J Cell Physiol 2019; 235:1165-1174. [PMID: 31268170 DOI: 10.1002/jcp.29030] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 06/12/2019] [Indexed: 12/22/2022]
Abstract
Recent evidence has verified the cardioprotective actions of irisin in different diseases models. However, the beneficial action of irisin on hypoxia-reoxygenation (HR) injury under high glucose stress has not been described. Herein our research investigated the influence of irisin on HR-triggered cardiomyocyte death under high glucose stress. HR model was established in vitro under high glucose treatment. The results illuminated that HR injury augmented apoptotic ratio of cardiomyocyte under high glucose stress; this effect could be abolished by irisin via modulating mitochondrial function. Irisin treatment attenuated cellular redox stress, improved cellular ATP biogenetics, sustained mitochondria potential, and impaired mitochondrion-related cell death. At the molecular levels, irisin treatment activated the 5'-adenosine monophosphate-activated protein kinase (AMPK) pathway and the latter protected cardiomyocyte and mitochondria against HR injury under high glucose stress. Altogether, our results indicated a novel role of irisin in HR-treated cardiomyocyte under high glucose stress. Irisin-activated AMPK pathway and the latter sustained cardiomyocyte viability and mitochondrial function.
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Affiliation(s)
- Jiamao Fan
- Department of Cardiology, Linfen Central Hospital, Linfen, China
| | - Qing Zhu
- Department of Cardiology, Linfen Central Hospital, Linfen, China.,Institutes of Biomedical Sciences, Shanghai Medical School, Fudan University, Shanghai, China
| | - Zhenhua Wu
- Department of Cardiology, Linfen Central Hospital, Linfen, China
| | - Jiao Ding
- Department of Cardiology, Linfen Central Hospital, Linfen, China
| | - Shuai Qin
- Department of Cardiovascular Surgery, Linfen Central Hospital, Linfen, China
| | - Hui Liu
- Department of Cardiovascular Surgery, Linfen Central Hospital, Linfen, China
| | - Pengfei Miao
- Department of Cardiology, Linfen Central Hospital, Linfen, China
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Role of Green Macroalgae Enteromorpha Prolifera Polyphenols in the Modulation of Gene Expression and Intestinal Microflora Profiles in Type 2 Diabetic Mice. Int J Mol Sci 2018; 20:ijms20010025. [PMID: 30577594 PMCID: PMC6337142 DOI: 10.3390/ijms20010025] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 12/09/2018] [Accepted: 12/18/2018] [Indexed: 11/17/2022] Open
Abstract
Effects of green macroalgae 55% ethanolic extract Enteromorpha prolifera through an ultrafiltration membrane of 3 kDa (EPE3k) on antidiabetic activity, gut microbiota, and regulation mechanism were investigated in high-fat/high-sucrose diet and streptozocin-induced diabetic mice. The structural characterizations of its major compounds in EPE3k were determined by ultra-performance liquid chromatography-quadrupole/time of flight mass spectrometry. Furthermore, the intestinal microflora modulation in diabetic mice was also investigated with high-throughput 16S rRNA gene sequencing. The proposed presence of polyphenols in EPE3k was confirmed. EPE3k could significantly decrease the fasting blood glucose and improve fasting glucose tolerance. The hypoglycemic effect of EPE3k was via activation of phosphatidylinositol 3-kinase and suppression of c-Jun N-terminal kinase in liver. EPE3k treatment significantly increased the relative abundance of Akkermansia and decreased the proportion of Alistipes and Turicibacter. The above results indicated that EPE3k could be provided as a new potential therapy for the treatment of type 2 diabetic mellitus.
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