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Splichal RC, Chen K, Walton SP, Chan C. The Role of Endoplasmic Reticulum Stress on Reducing Recombinant Protein Production in Mammalian Cells. Biochem Eng J 2024; 210:109434. [PMID: 39220803 PMCID: PMC11360842 DOI: 10.1016/j.bej.2024.109434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
Therapeutic recombinant protein production relies on industrial scale culture of mammalian cells to produce active proteins in quantities sufficient for clinical use. The combination of stresses from industrial cell culture environment and recombinant protein production can overwhelm the protein synthesis machinery in the endoplasmic reticulum (ER). This leads to a buildup of improperly folded proteins which induces ER stress. Cells respond to ER stress by activating the Unfolded Protein Response (UPR). To restore proteostasis, ER sensor proteins reduce global protein synthesis and increase chaperone protein synthesis, and if that is insufficient the proteins are degraded. If proteostasis is still not restored, apoptosis is initiated. Increasing evidence suggests crosstalk between ER proteostasis and DNA damage repair (DDR) pathways. External factors (e.g., metabolites) from the cellular environment as well as internal factors (e.g., transgene copy number) can impact genome stability. Failure to maintain genome integrity reduces cell viability and in turn protein production. This review focuses on the association between ER stress and processes that affect protein production and secretion. The processes mediated by ER stress, including inhibition of global protein translation, chaperone protein production, degradation of misfolded proteins, DNA repair, and protein secretion, impact recombinant protein production. Recombinant protein production can be reduced by ER stress through increased autophagy and protein degradation, reduced protein secretion, and reduced DDR response.
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Affiliation(s)
- R. Chauncey Splichal
- Department of Chemical Engineering and Materials Science, Michigan State University, MI, USA
| | - Kevin Chen
- Department of Chemical Engineering and Materials Science, Michigan State University, MI, USA
| | - S. Patrick Walton
- Department of Chemical Engineering and Materials Science, Michigan State University, MI, USA
| | - Christina Chan
- Department of Chemical Engineering and Materials Science, Michigan State University, MI, USA
- Department of Biochemistry and Molecular Biology, Michigan State University, MI, USA
- Department of Computer Science and Engineering, Michigan State University, MI, USA
- Institute for Quantitative Health Science and Engineering, Division of Medical Devices, Michigan State University, MI, USA
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2
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Białek W, Hryniewicz-Jankowska A, Czechowicz P, Sławski J, Collawn JF, Czogalla A, Bartoszewski R. The lipid side of unfolded protein response. Biochim Biophys Acta Mol Cell Biol Lipids 2024; 1869:159515. [PMID: 38844203 DOI: 10.1016/j.bbalip.2024.159515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/16/2024] [Accepted: 05/31/2024] [Indexed: 06/12/2024]
Abstract
Although our current knowledge of the molecular crosstalk between the ER stress, the unfolded protein response (UPR), and lipid homeostasis remains limited, there is increasing evidence that dysregulation of either protein or lipid homeostasis profoundly affects the other. Most research regarding UPR signaling in human diseases has focused on the causes and consequences of disrupted protein folding. The UPR itself consists of very complex pathways that function to not only maintain protein homeostasis, but just as importantly, modulate lipid biogenesis to allow the ER to adjust and promote cell survival. Lipid dysregulation is known to activate many aspects of the UPR, but the complexity of this crosstalk remains a major research barrier. ER lipid disequilibrium and lipotoxicity are known to be important contributors to numerous human pathologies, including insulin resistance, liver disease, cardiovascular diseases, neurodegenerative diseases, and cancer. Despite their medical significance and continuous research, however, the molecular mechanisms that modulate lipid synthesis during ER stress conditions, and their impact on cell fate decisions, remain poorly understood. Here we summarize the current view on crosstalk and connections between altered lipid metabolism, ER stress, and the UPR.
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Affiliation(s)
- Wojciech Białek
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | | | - Paulina Czechowicz
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Jakub Sławski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - James F Collawn
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, USA
| | - Aleksander Czogalla
- Department of Cytobiochemistry, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland
| | - Rafał Bartoszewski
- Department of Biophysics, Faculty of Biotechnology, University of Wroclaw, Wroclaw, Poland.
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3
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Abolfazli S, Butler AE, Kesharwani P, Sahebkar A. The beneficial impact of curcumin on cardiac lipotoxicity. J Pharm Pharmacol 2024:rgae102. [PMID: 39180454 DOI: 10.1093/jpp/rgae102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 07/02/2024] [Indexed: 08/26/2024]
Abstract
Lipotoxicity is defined as a prolonged metabolic imbalance of lipids that results in ectopic fat distribution in peripheral organs such as the liver, heart, and kidney. The harmful consequences of excessive lipid accumulation in cardiomyocytes cause cardiac lipotoxicity, which alters the structure and function of the heart. Obesity and diabetes are linked to lipotoxic cardiomyopathy. These anomalies might be caused by a harmful metabolic shift that accumulates toxic lipids and shifts glucose oxidation to less fatty acid oxidation. Research has linked fatty acids, fatty acyl coenzyme A, diacylglycerol, and ceramide to lipotoxic stress in cells. This stress can be brought on by apoptosis, impaired insulin signaling, endoplasmic reticulum stress, protein kinase C activation, p38 Ras-mitogen-activated protein kinase (MAPK) activation, or modification of peroxisome proliferator-activated receptors (PPARs) family members. Curcuma longa is used to extract curcumin, a hydrophobic polyphenol derivative with a variety of pharmacological characteristics. Throughout the years, curcumin has been utilized as an anti-inflammatory, antioxidant, anticancer, hepatoprotective, cardioprotective, anti-diabetic, and anti-obesity drug. Curcumin reduces cardiac lipotoxicity by inhibiting apoptosis and decreasing the expression of apoptosis-related proteins, reducing the expression of inflammatory cytokines, activating the autophagy signaling pathway, and inhibiting the expression of endoplasmic reticulum stress marker proteins.
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Affiliation(s)
- Sajad Abolfazli
- Student Research Committee, School of Pharmacy, Mazandaran University Medical Science, Sari, Iran
| | - Alexandra E Butler
- Research Department, Royal College of Surgeons in Ireland, Bahrain, Adliya, Bahrain
| | - Prashant Kesharwani
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi 110062, India
| | - Amirhossein Sahebkar
- Center for Global Health Research, Saveetha Medical College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
- Biotechnology Research Center, Pharmaceutical Technology Institute, Mashhad University of Medical Sciences, Mashhad, Iran
- Applied Biomedical Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
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4
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Berkel C. Inducers and Inhibitors of Pyroptotic Death of Granulosa Cells in Models of Premature Ovarian Insufficiency and Polycystic Ovary Syndrome. Reprod Sci 2024:10.1007/s43032-024-01643-3. [PMID: 39026050 DOI: 10.1007/s43032-024-01643-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Accepted: 07/01/2024] [Indexed: 07/20/2024]
Abstract
Granulosa cells (GCs), the largest cell population and primary source of steroid hormones in the ovary, are the important somatic ovarian components. They have critical roles in folliculogenesis by supporting oocyte, facilitating its growth, and providing a microenvironment suitable for follicular development and oocyte maturation, thus having essential functions in maintaining female fertility and in reproductive health in general. Pyroptotic death of GCs and associated inflammation have been implicated in the pathogenesis of several reproductive disorders in females including Premature Ovarian Insufficiency (POI) and Polycystic Ovary Syndrome (PCOS). Here, I reviewed factors, either intrinsic or extrinsic, that induce or inhibit pyroptosis in GCs in various models of these disorders, both in vitro and in vivo, and also covered associated molecular mechanisms. Most of these studied factors influence NLRP3 inflammasome- and GSDMD (Gasdermin D)-mediated pyroptosis in GCs, compared to other inflammasomes and gasdermins (GSDMs). I conclude that a more complete mechanistic understanding of these factors in terms of GC pyroptosis is required to be able to develop novel strategies targeting inflammatory cell death in the ovary.
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Affiliation(s)
- Caglar Berkel
- Department of Molecular Biology and Genetics, Tokat Gaziosmanpasa University, Tokat, Türkiye.
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5
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Yu X, Xu R, Huang X, Chen H, Zhang Z, Wong I, Chen Z, Deng F. Size-Dependent Effect of Titania Nanotubes on Endoplasmic Reticulum Stress to Re-establish Diabetic Macrophages Homeostasis. ACS Biomater Sci Eng 2024; 10:4323-4335. [PMID: 38860558 DOI: 10.1021/acsbiomaterials.4c00549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
In patients with diabetes, endoplasmic reticulum stress (ERS) is a crucial disrupting factor of macrophage homeostasis surrounding implants, which remains an obstacle to oral implantation success. Notably, the ERS might be modulated by the implant surface morphology. Titania nanotubes (TNTs) may enhance diabetic osseointegration. However, a consensus has not been achieved regarding the tube-size-dependent effect and the underlying mechanism of TNTs on diabetic macrophage ERS. We manufactured TNTs with small (30 nm) and large diameters (100 nm). Next, we assessed how the different titanium surfaces affected diabetic macrophages and regulated ERS and Ca2+ homeostasis. TNTs alleviated the inflammatory response, oxidative stress, and ERS in diabetic macrophages. Furthermore, TNT30 was superior to TNT100. Inhibiting ERS abolished the positive effect of TNT30. Mechanistically, topography-induced extracellular Ca2+ influx might mitigate excessive ERS in macrophages by alleviating ER Ca2+ depletion and IP3R activation. Furthermore, TNT30 attenuated the peri-implant inflammatory response and promoted osseointegration in diabetic rats. TNTs with small nanodiameters attenuated ERS and re-established diabetic macrophage hemostasis by inhibiting IP3R-induced ER Ca2+ depletion.
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Affiliation(s)
- Xiaoran Yu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
| | - Ruogu Xu
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
| | - Xiaoqiong Huang
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
| | - Hongcheng Chen
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
| | - Zhengchuan Zhang
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
| | - Iohong Wong
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
| | - Zetao Chen
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
| | - Feilong Deng
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University, Guangzhou 510055, PR China
- Guangdong Provincial Key Laboratory of Stomatology, Guangzhou 510080, PR China
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6
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Wu J, Sun X, Jiang P. Metabolism-inflammasome crosstalk shapes innate and adaptive immunity. Cell Chem Biol 2024; 31:884-903. [PMID: 38759617 DOI: 10.1016/j.chembiol.2024.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 04/08/2024] [Accepted: 04/16/2024] [Indexed: 05/19/2024]
Abstract
Inflammasomes are a central component of innate immunity and play a vital role in regulating innate immune response. Activation of inflammasomes is also indispensable for adaptive immunity, modulating the development and response of adaptive immunity. Recently, increasing studies have shown that metabolic alterations and adaptations strongly influence and regulate the differentiation and function of the immune system. In this review, we will take a holistic view of how inflammasomes bridge innate and adaptive (especially T cell) immunity and how inflammasomes crosstalk with metabolic signals during the immune responses. And, special attention will be paid to the metabolic control of inflammasome-mediated interactions between innate and adaptive immunity in disease. Understanding the metabolic regulatory functions of inflammasomes would provide new insights into future research directions in this area and may help to identify potential targets for inflammasome-associated diseases and broaden therapeutic avenues.
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Affiliation(s)
- Jun Wu
- School of Pharmaceutical Sciences, Xiamen University, Xiamen 361102, Fujian, China; State Key Laboratory of Molecular Oncology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Center for Life Sciences, Beijing 100084, China
| | - Xuan Sun
- State Key Laboratory of Molecular Oncology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Center for Life Sciences, Beijing 100084, China
| | - Peng Jiang
- State Key Laboratory of Molecular Oncology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Tsinghua-Peking Center for Life Sciences, Beijing 100084, China.
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7
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Sasaki I, Fukuda-Ohta Y, Nakai C, Wakaki-Nishiyama N, Okamoto C, Okuzaki D, Morita S, Kaji S, Furuta Y, Hemmi H, Kato T, Yamamoto A, Tosuji E, Saitoh SI, Tanaka T, Hoshino K, Fukuda S, Miyake K, Kuroda E, Ishii KJ, Iwawaki T, Furukawa K, Kaisho T. A stress sensor, IRE1α, is required for bacterial-exotoxin-induced interleukin-1β production in tissue-resident macrophages. Cell Rep 2024; 43:113981. [PMID: 38520688 DOI: 10.1016/j.celrep.2024.113981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 01/31/2024] [Accepted: 03/06/2024] [Indexed: 03/25/2024] Open
Abstract
Cholera toxin (CT), a bacterial exotoxin composed of one A subunit (CTA) and five B subunits (CTB), functions as an immune adjuvant. CTB can induce production of interleukin-1β (IL-1β), a proinflammatory cytokine, in synergy with a lipopolysaccharide (LPS), from resident peritoneal macrophages (RPMs) through the pyrin and NLRP3 inflammasomes. However, how CTB or CT activates these inflammasomes in the macrophages has been unclear. Here, we clarify the roles of inositol-requiring enzyme 1 alpha (IRE1α), an endoplasmic reticulum (ER) stress sensor, in CT-induced IL-1β production in RPMs. In RPMs, CTB is incorporated into the ER and induces ER stress responses, depending on GM1, a cell membrane ganglioside. IRE1α-deficient RPMs show a significant impairment of CT- or CTB-induced IL-1β production, indicating that IRE1α is required for CT- or CTB-induced IL-1β production in RPMs. This study demonstrates the critical roles of IRE1α in activation of both NLRP3 and pyrin inflammasomes in tissue-resident macrophages.
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Affiliation(s)
- Izumi Sasaki
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan.
| | - Yuri Fukuda-Ohta
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan; Laboratory for Protein Conformation Diseases, RIKEN Center for Brain Science, Wako, Saitama 351-0198, Japan
| | - Chihiro Nakai
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Naoko Wakaki-Nishiyama
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Chizuyo Okamoto
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Daisuke Okuzaki
- Genome Information Research Center, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Shuhei Morita
- First Department of Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Shiori Kaji
- Second Department of Internal Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Yuki Furuta
- Department of Thoracic and Cardiovascular Surgery, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Hiroaki Hemmi
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan; Laboratory of Immunology, Faculty of Veterinary Medicine, Okayama University of Science, Imabari, Ehime 794-8555, Japan
| | - Takashi Kato
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Asumi Yamamoto
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Emi Tosuji
- Department of Dermatology, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Shin-Ichiroh Saitoh
- Department of Intractable Disorders, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan
| | - Takashi Tanaka
- Laboratory for Developmental Genetics, RIKEN Center for Integrative Medical Science, Yokohama, Kanagawa 230-0045, Japan
| | - Katsuaki Hoshino
- Department of Immunology, Faculty of Medicine, Kagawa University, Miki, Kagawa 761-0793, Japan
| | - Shinji Fukuda
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata 997-0052, Japan; Gut Environmental Design Group, Kanagawa Institute of Industrial Science and Technology, Kawasaki, Kanagawa 210-0821, Japan; Transborder Medical Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8575, Japan; Laboratory for Regenerative Microbiology, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Kensuke Miyake
- Division of Innate Immunity, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Etsushi Kuroda
- Department of Immunology, School of Medicine, Hyogo Medical University, Nishinomiya, Hyogo 663-8501, Japan
| | - Ken J Ishii
- Division of Vaccine Science, Department of Microbiology and Immunology, The Institute of Medical Science, University of Tokyo, Tokyo 108-8639, Japan
| | - Takao Iwawaki
- Division of Cell Medicine, Department of Life Science, Medical Research Institute, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Koichi Furukawa
- Department of Biomedical Sciences, Chubu University College of Life and Health Sciences, Kasugai, Aichi 487-8501, Japan
| | - Tsuneyasu Kaisho
- Department of Immunology, Institute of Advanced Medicine, Wakayama Medical University, Wakayama 641-8509, Japan.
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8
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Ma M, Jiang W, Zhou R. DAMPs and DAMP-sensing receptors in inflammation and diseases. Immunity 2024; 57:752-771. [PMID: 38599169 DOI: 10.1016/j.immuni.2024.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 02/17/2024] [Accepted: 03/01/2024] [Indexed: 04/12/2024]
Abstract
Damage-associated molecular patterns (DAMPs) are endogenous danger molecules produced in cellular damage or stress, and they can activate the innate immune system. DAMPs contain multiple types of molecules, including nucleic acids, proteins, ions, glycans, and metabolites. Although these endogenous molecules do not trigger immune response under steady-state condition, they may undergo changes in distribution, physical or chemical property, or concentration upon cellular damage or stress, and then they become DAMPs that can be sensed by innate immune receptors to induce inflammatory response. Thus, DAMPs play an important role in inflammation and inflammatory diseases. In this review, we summarize the conversion of homeostatic molecules into DAMPs; the diverse nature and classification, cellular origin, and sensing of DAMPs; and their role in inflammation and related diseases. Furthermore, we discuss the clinical strategies to treat DAMP-associated diseases via targeting DAMP-sensing receptors.
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Affiliation(s)
- Ming Ma
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Wei Jiang
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Rongbin Zhou
- Key Laboratory of Immune Response and Immunotherapy, Center for Advanced Interdisciplinary Science and Biomedicine of IHM, School of Basic Medical Sciences, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230027, Anhui, China; Department of Geriatrics, Gerontology Institute of Anhui Province, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230001, China.
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9
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Bu J, Mahan Y, Zhang S, Wu X, Zhang X, Zhou L, Zhang Y. Acacetin inhibits inflammation by blocking MAPK/NF-κB pathways and NLRP3 inflammasome activation. Front Pharmacol 2024; 15:1286546. [PMID: 38389927 PMCID: PMC10883387 DOI: 10.3389/fphar.2024.1286546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 01/26/2024] [Indexed: 02/24/2024] Open
Abstract
Objective: Our preliminary research indicates that acacetin modulates the nucleotide-binding oligomerization domain (NOD)-like receptor pyrin domain containing 3 (NLRP3) inflammasome, providing protection against Alzheimer's Disease (AD) and cerebral ischemic reperfusion injury. The mechanisms of acacetin to inhibit the activation of the NLRP3 inflammasome remain fully elucidated. This study aims to investigate the effects and potential mechanisms of acacetin on various agonists induced NLRP3 inflammasome activation. Methods: A model for the NLRP3 inflammasome activation was established in mouse bone marrow-derived macrophages (BMDMs) using Monosodium Urate (MSU), Nigericin, Adenosine Triphosphate (ATP), and Pam3CSK4, separately. Western blot analysis (WB) was employed to detect Pro-caspase-1, Pro-Interleukin-1β (Pro-IL-1β) in cell lysates, and caspase-1, IL-1β in supernatants. Enzyme-Linked Immunosorbent Assay (ELISA) was used to measured the release of IL-1β, IL-18, and Tumor Necrosis Factor-alpha (TNF-α) in cell supernatants to assess the impact of acacetin on NLRP3 inflammasome activation. The lactate dehydrogenase (LDH) release was also assessed. The Nuclear Factor Kappa B (NF-κB) and Mitogen-Activated Protein Kinase (MAPK) signaling pathways related proteins were evaluated by WB, and NF-κB nuclear translocation was observed via laser scanning confocal microscopy (LSCM). Disuccinimidyl Suberate (DSS) cross-linking was employed to detect oligomerization of Apoptosis-associated Speck-like protein containing a Caspase Recruitment Domain (ASC), and LSCM was also used to observe Reactive Oxygen Species (ROS) production. Inductively Coupled Plasma (ICP) and N-(6-methoxyquinolyl) acetoethyl ester (MQAE) assays were utilized to determined the effects of acacetin on the efflux of potassium (K+) and chloride (Cl-) ions. Results: Acacetin inhibited NLRP3 inflammasome activation induced by various agonists, reducing the release of TNF-α, IL-1β, IL-18, and LDH. It suppressed the expression of Lipopolysaccharides (LPS)-activated Phosphorylated ERK (p-ERK), p-JNK, and p-p38, inhibited NF-κB p65 phosphorylation and nuclear translocation. Acacetin also reduced ROS production and inhibited ASC aggregation, thus suppressing NLRP3 inflammasome activation. Notably, acacetin did not affect K+ and Cl-ions efflux during the activation process. Conclusion: Acacetin shows inhibitory effects on both the priming and assembly processes of the NLRP3 inflammasome, positioning it as a promising new candidate for the treatment of NLRP3 inflammasome-related diseases.
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Affiliation(s)
- Juan Bu
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Yeledan Mahan
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Shengnan Zhang
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Xuanxia Wu
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Xiaoling Zhang
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Ling Zhou
- Medical and Translational Research Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
| | - Yanmin Zhang
- Scientific Research and Education Center, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi, China
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10
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Huang S, Ghasem Ardabili N, Davidson TL, Riley AL. Western diet consumption does not impact the rewarding and aversive effects of morphine in male Sprague-Dawley rats. Physiol Behav 2023; 270:114317. [PMID: 37541607 DOI: 10.1016/j.physbeh.2023.114317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/06/2023]
Abstract
The impacts of high-fat and/or high-sugar diets on opioid-induced effects are well documented; however, little is known about the effect of such diet on the affective responses to opiates. To address this issue, in the present experiment male Sprague-Dawley rats were given ad libitum access to a western-style diet (high in saturated fat and sugar) or a standard laboratory chow diet beginning in adolescence and continuing into adulthood at which point they were trained in a combined conditioned taste avoidance (CTA)/conditioned place preference (CPP) procedure to assess the aversive and rewarding effects of morphine, respectively. On four conditioning cycles, animals were given access to a novel saccharin solution, injected with morphine (1 mg/kg or 5 mg/kg), and then placed on one side of a place preference chamber. Animals were then tested for place preference and saccharin preference. All subjects injected with morphine displayed significant avoidance of the morphine-associated solution (CTA) and preferred the side associated with the drug (CPP). Furthermore, there were no differences between the two diet groups, indicating that chronic exposure to the western diet had no impact on the affective properties of morphine (despite increasing caloric intake, body weight, body fat and lean body mass). Given previously reported increases in drug self-administration in animals with a history of western-diet consumption, this study suggests that western-diet exposure may increase drug intake via mechanisms other than changes in the rewarding or aversive effects of the drug.
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Affiliation(s)
- Shihui Huang
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW., Washington, D.C. 20016, United States.
| | - Negar Ghasem Ardabili
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW., Washington, D.C. 20016, United States
| | - Terry L Davidson
- Laboratory for Behavioral and Neural Homeostasis, Department of Neuroscience, Center for Neuroscience and Behavior, American University, Washington, D.C. 20016, United States
| | - Anthony L Riley
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW., Washington, D.C. 20016, United States.
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11
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Stansbury CM, Dotson GA, Pugh H, Rehemtulla A, Rajapakse I, Muir LA. A lipid-associated macrophage lineage rewires the spatial landscape of adipose tissue in early obesity. JCI Insight 2023; 8:e171701. [PMID: 37651193 PMCID: PMC10619435 DOI: 10.1172/jci.insight.171701] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 08/29/2023] [Indexed: 09/02/2023] Open
Abstract
Adipose tissue macrophage (ATM) infiltration is associated with adipose tissue dysfunction and insulin resistance in mice and humans. Recent single-cell data highlight increased ATM heterogeneity in obesity but do not provide a spatial context for ATM phenotype dynamics. We integrated single-cell RNA-Seq, spatial transcriptomics, and imaging of murine adipose tissue in a time course study of diet-induced obesity. Overall, proinflammatory immune cells were predominant in early obesity, whereas nonresident antiinflammatory ATMs predominated in chronic obesity. A subset of these antiinflammatory ATMs were transcriptomically intermediate between monocytes and mature lipid-associated macrophages (LAMs) and were consistent with a LAM precursor (pre-LAM). Pre-LAMs were spatially associated with early obesity crown-like structures (CLSs), which indicate adipose tissue dysfunction. Spatial data showed colocalization of ligand-receptor transcripts related to lipid signaling among monocytes, pre-LAMs, and LAMs, including Apoe, Lrp1, Lpl, and App. Pre-LAM expression of these ligands in early obesity suggested signaling to LAMs in the CLS microenvironment. Our results refine understanding of ATM diversity and provide insight into the dynamics of the LAM lineage during development of metabolic disease.
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Affiliation(s)
- Cooper M. Stansbury
- Department of Computational Medicine and Bioinformatics
- The Michigan Institute for Computational Discovery and Engineering
| | | | - Harrison Pugh
- Department of Computational Medicine and Bioinformatics
| | | | - Indika Rajapakse
- Department of Computational Medicine and Bioinformatics
- Department of Mathematics, University of Michigan, Ann Arbor, Michigan, USA
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12
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Iovino M, Colonval M, Wilkin C, L’homme L, Lassence C, Campas M, Peulen O, de Tullio P, Piette J, Legrand-Poels S. Novel XBP1s-independent function of IRE1 RNase in HIF-1α-mediated glycolysis upregulation in human macrophages upon stimulation with LPS or saturated fatty acid. Front Immunol 2023; 14:1204126. [PMID: 37711626 PMCID: PMC10498766 DOI: 10.3389/fimmu.2023.1204126] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 08/01/2023] [Indexed: 09/16/2023] Open
Abstract
In obesity, adipose tissue infiltrating macrophages acquire a unique pro-inflammatory polarization, thereby playing a key role in the development of chronic inflammation and Type 2 diabetes. Increased saturated fatty acids (SFAs) levels have been proposed to drive this specific polarization. Accordingly, we investigated the immunometabolic reprogramming in SFA-treated human macrophages. As expected, RNA sequencing highlighted a pro-inflammatory profile but also metabolic signatures including glycolysis and hypoxia as well as a strong unfolded protein response. Glycolysis upregulation was confirmed in SFA-treated macrophages by measuring glycolytic gene expression, glucose uptake, lactate production and extracellular acidification rate. Like in LPS-stimulated macrophages, glycolysis activation in SFA-treated macrophages was dependent on HIF-1α activation and fueled the production of pro-inflammatory cytokines. SFAs and LPS both induced IRE1α endoribonuclease activity, as demonstrated by XBP1 mRNA splicing, but with different kinetics matching HIF-1α activation and the glycolytic gene expression. Interestingly, the knockdown of IRE1α and/or the pharmacological inhibition of its RNase activity prevented HIF-1α activation and significantly decreased glycolysis upregulation. Surprisingly, XBP1s appeared to be dispensable, as demonstrated by the lack of inhibiting effect of XBP1s knockdown on glycolytic genes expression, glucose uptake, lactate production and HIF-1α activation. These experiments demonstrate for the first time a key role of IRE1α in HIF-1α-mediated glycolysis upregulation in macrophages stimulated with pro-inflammatory triggers like LPS or SFAs through XBP1s-independent mechanism. IRE1 could mediate this novel function by targeting other transcripts (mRNA or pre-miRNA) through a mechanism called regulated IRE1-dependent decay or RIDD. Deciphering the underlying mechanisms of this novel IRE1 function might lead to novel therapeutic targets to curtail sterile obesity- or infection-linked inflammation.
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Affiliation(s)
- Margaud Iovino
- Laboratory of Immunometabolism and Nutrition, GIGA, ULiège, Liège, Belgium
| | - Megan Colonval
- Laboratory of Immunometabolism and Nutrition, GIGA, ULiège, Liège, Belgium
| | - Chloé Wilkin
- Laboratory of Immunometabolism and Nutrition, GIGA, ULiège, Liège, Belgium
| | - Laurent L’homme
- Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, U1011-EGID, Lille, France
| | - Cédric Lassence
- Laboratory of Virology and Immunology, GIGA, ULiège, Liège, Belgium
| | - Manon Campas
- Clinical Metabolomics Group, CIRM, ULiège, Liege, Belgium
| | - Olivier Peulen
- Metastasis Research Laboratory, GIGA, ULiège, Liège, Belgium
| | | | - Jacques Piette
- Laboratory of Virology and Immunology, GIGA, ULiège, Liège, Belgium
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13
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Duisenbek A, Lopez-Armas GC, Pérez M, Avilés Pérez MD, Aguilar Benitez JM, Pereira Pérez VR, Gorts Ortega J, Yessenbekova A, Ablaikhanova N, Escames G, Acuña-Castroviejo D, Rusanova I. Insights into the Role of Plasmatic and Exosomal microRNAs in Oxidative Stress-Related Metabolic Diseases. Antioxidants (Basel) 2023; 12:1290. [PMID: 37372020 DOI: 10.3390/antiox12061290] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 06/05/2023] [Accepted: 06/10/2023] [Indexed: 06/29/2023] Open
Abstract
A common denominator of metabolic diseases, including type 2 diabetes Mellitus, dyslipidemia, and atherosclerosis, are elevated oxidative stress and chronic inflammation. These complex, multi-factorial diseases are caused by the detrimental interaction between the individual genetic background and multiple environmental stimuli. The cells, including the endothelial ones, acquire a preactivated phenotype and metabolic memory, exhibiting increased oxidative stress, inflammatory gene expression, endothelial vascular activation, and prothrombotic events, leading to vascular complications. There are different pathways involved in the pathogenesis of metabolic diseases, and increased knowledge suggests a role of the activation of the NF-kB pathway and NLRP3 inflammasome as key mediators of metabolic inflammation. Epigenetic-wide associated studies provide new insight into the role of microRNAs in the phenomenon of metabolic memory and the development consequences of vessel damage. In this review, we will focus on the microRNAs related to the control of anti-oxidative enzymes, as well as microRNAs related to the control of mitochondrial functions and inflammation. The objective is the search for new therapeutic targets to improve the functioning of mitochondria and reduce oxidative stress and inflammation, despite the acquired metabolic memory.
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Affiliation(s)
- Ayauly Duisenbek
- Department of Biophysics, Biomedicine and Neuroscience, Al-Farabi Kazakh National University, Al-Farabi Av. 71, Almaty 050040, Kazakhstan
- Department of Biochemistry and Molecular Biology I, Faculty of Science, University of Granada, 18019 Granada, Spain
| | - Gabriela C Lopez-Armas
- Departamento de Investigación y Extensión, Centro de Enseñanza Técnica Industrial, C. Nueva Escocia 1885, Guadalajara 44638, Mexico
| | - Miguel Pérez
- Hospital de Alta Resolución de Alcalá la Real, 23680 Jaén, Spain
| | - María D Avilés Pérez
- Endocrinology and Nutrition Unit, Instituto de Investigación Biosanitaria de Granada (Ibs.GRANADA), University Hospital Clínico San Cecilio, 18016 Granada, Spain
| | | | - Víctor Roger Pereira Pérez
- Department of Biochemistry and Molecular Biology I, Faculty of Science, University of Granada, 18019 Granada, Spain
| | - Juan Gorts Ortega
- Department of Biochemistry and Molecular Biology I, Faculty of Science, University of Granada, 18019 Granada, Spain
| | - Arailym Yessenbekova
- Department of Biophysics, Biomedicine and Neuroscience, Al-Farabi Kazakh National University, Al-Farabi Av. 71, Almaty 050040, Kazakhstan
- Department of Biochemistry and Molecular Biology I, Faculty of Science, University of Granada, 18019 Granada, Spain
| | - Nurzhanyat Ablaikhanova
- Department of Biophysics, Biomedicine and Neuroscience, Al-Farabi Kazakh National University, Al-Farabi Av. 71, Almaty 050040, Kazakhstan
| | - Germaine Escames
- Centro de Investigación Biomédica en Red Fragilidad y Envejecimiento Saludable (CIBERfes), Instituto de Investigación Biosanitaria de Granada (Ibs.GRANADA), San Cecilio University Hospital Clínico, 18016 Granada, Spain
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, 18016 Granada, Spain
- Department of Physiology, Faculty of Medicine, University of Granada, 18016 Granada, Spain
| | - Darío Acuña-Castroviejo
- Centro de Investigación Biomédica en Red Fragilidad y Envejecimiento Saludable (CIBERfes), Instituto de Investigación Biosanitaria de Granada (Ibs.GRANADA), San Cecilio University Hospital Clínico, 18016 Granada, Spain
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, 18016 Granada, Spain
- Department of Physiology, Faculty of Medicine, University of Granada, 18016 Granada, Spain
| | - Iryna Rusanova
- Department of Biochemistry and Molecular Biology I, Faculty of Science, University of Granada, 18019 Granada, Spain
- Centro de Investigación Biomédica en Red Fragilidad y Envejecimiento Saludable (CIBERfes), Instituto de Investigación Biosanitaria de Granada (Ibs.GRANADA), San Cecilio University Hospital Clínico, 18016 Granada, Spain
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, 18016 Granada, Spain
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14
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Bauer S, Hezinger L, Rexhepi F, Ramanathan S, Kufer TA. NOD-like Receptors-Emerging Links to Obesity and Associated Morbidities. Int J Mol Sci 2023; 24:ijms24108595. [PMID: 37239938 DOI: 10.3390/ijms24108595] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 05/06/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
Obesity and its associated metabolic morbidities have been and still are on the rise, posing a major challenge to health care systems worldwide. It has become evident over the last decades that a low-grade inflammatory response, primarily proceeding from the adipose tissue (AT), essentially contributes to adiposity-associated comorbidities, most prominently insulin resistance (IR), atherosclerosis and liver diseases. In mouse models, the release of pro-inflammatory cytokines such as TNF-alpha (TNF-α) and interleukin (IL)-1β and the imprinting of immune cells to a pro-inflammatory phenotype in AT play an important role. However, the underlying genetic and molecular determinants are not yet understood in detail. Recent evidence demonstrates that nucleotide-binding and oligomerization domain (NOD)-like receptor (NLR) family proteins, a group of cytosolic pattern recognition receptors (PRR), contribute to the development and control of obesity and obesity-associated inflammatory responses. In this article, we review the current state of research on the role of NLR proteins in obesity and discuss the possible mechanisms leading to and the outcomes of NLR activation in the obesity-associated morbidities IR, type 2 diabetes mellitus (T2DM), atherosclerosis and non-alcoholic fatty liver disease (NAFLD) and discuss emerging ideas about possibilities for NLR-based therapeutic interventions of metabolic diseases.
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Affiliation(s)
- Sarah Bauer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Lucy Hezinger
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
| | - Fjolla Rexhepi
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
| | - Sheela Ramanathan
- Department of Immunology and Cell Biology, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
| | - Thomas A Kufer
- Institute of Nutritional Medicine, Department of Immunology, University of Hohenheim, 70593 Stuttgart, Germany
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15
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Müller L, Power Guerra N, Schildt A, Lindner T, Stenzel J, Behrangi N, Bergner C, Alberts T, Bühler D, Kurth J, Krause BJ, Janowitz D, Teipel S, Vollmar B, Kuhla A. [ 18F]GE-180-PET and Post Mortem Marker Characteristics of Long-Term High-Fat-Diet-Induced Chronic Neuroinflammation in Mice. Biomolecules 2023; 13:biom13050769. [PMID: 37238638 DOI: 10.3390/biom13050769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 04/14/2023] [Accepted: 04/26/2023] [Indexed: 05/28/2023] Open
Abstract
Obesity is characterized by immoderate fat accumulation leading to an elevated risk of neurodegenerative disorders, along with a host of metabolic disturbances. Chronic neuroinflammation is a main factor linking obesity and the propensity for neurodegenerative disorders. To determine the cerebrometabolic effects of diet-induced obesity (DIO) in female mice fed a long-term (24 weeks) high-fat diet (HFD, 60% fat) compared to a group on a control diet (CD, 20% fat), we used in vivo PET imaging with the radiotracer [18F]FDG as a marker for brain glucose metabolism. In addition, we determined the effects of DIO on cerebral neuroinflammation using translocator protein 18 kDa (TSPO)-sensitive PET imaging with [18F]GE-180. Finally, we performed complementary post mortem histological and biochemical analyses of TSPO and further microglial (Iba1, TMEM119) and astroglial (GFAP) markers as well as cerebral expression analyses of cytokines (e.g., Interleukin (IL)-1β). We showed the development of a peripheral DIO phenotype, characterized by increased body weight, visceral fat, free triglycerides and leptin in plasma, as well as increased fasted blood glucose levels. Furthermore, we found obesity-associated hypermetabolic changes in brain glucose metabolism in the HFD group. Our main findings with respect to neuroinflammation were that neither [18F]GE-180 PET nor histological analyses of brain samples seem fit to detect the predicted cerebral inflammation response, despite clear evidence of perturbed brain metabolism along with elevated IL-1β expression. These results could be interpreted as a metabolically activated state in brain-resident immune cells due to a long-term HFD.
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Affiliation(s)
- Luisa Müller
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Department of Psychosomatic Medicine and Psychotherapy, Rostock University Medical Centre, 18147 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
| | - Nicole Power Guerra
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Institute of Anatomy, Rostock University Medical Centre, 18057 Rostock, Germany
- Smell & Taste Clinic, Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, 01034 Dresden, Germany
| | - Anna Schildt
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Tobias Lindner
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Jan Stenzel
- Core Facility Multimodal Small Animal Imaging, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Newshan Behrangi
- Institute of Anatomy and Cell Biology, Medical University of Bonn, 53115 Bonn, Germany
| | - Carina Bergner
- Department of Clinic and Polyclinic for Nuclear Medicine, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Teresa Alberts
- Institute of Anatomy and Cell Biology, Medical University of Bonn, 53115 Bonn, Germany
| | - Daniel Bühler
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Jens Kurth
- Department of Clinic and Polyclinic for Nuclear Medicine, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Bernd Joachim Krause
- Department of Clinic and Polyclinic for Nuclear Medicine, Rostock University Medical Centre, 18057 Rostock, Germany
| | - Deborah Janowitz
- Department of Psychiatry, University of Greifswald, 17475 Greifswald, Germany
| | - Stefan Teipel
- Department of Psychosomatic Medicine and Psychotherapy, Rostock University Medical Centre, 18147 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
- Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE) Rostock/Greifswald, 18147 Rostock, Germany
| | - Brigitte Vollmar
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
| | - Angela Kuhla
- Rudolf-Zenker-Institute for Experimental Surgery, Rostock University Medical Centre, 18057 Rostock, Germany
- Centre for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Centre, 18147 Rostock, Germany
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16
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Henn RE, Guo K, Elzinga SE, Noureldein MH, Mendelson FE, Hayes JM, Rigan DM, Savelieff MG, Hur J, Feldman EL. Single-cell RNA sequencing identifies hippocampal microglial dysregulation in diet-induced obesity. iScience 2023; 26:106164. [PMID: 36915697 PMCID: PMC10006681 DOI: 10.1016/j.isci.2023.106164] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 12/23/2022] [Accepted: 02/02/2023] [Indexed: 02/10/2023] Open
Abstract
Obesity is a growing global concern in adults and youth with a parallel rise in associated complications, including cognitive impairment. Obesity induces brain inflammation and activates microglia, which contribute to cognitive impairment by aberrantly phagocytosing synaptic spines. Local and systemic signals, such as inflammatory cytokines and metabolites likely participate in obesity-induced microglial activation. However, the precise mechanisms mediating microglial activation during obesity remain incompletely understood. Herein, we leveraged our mouse model of high-fat diet (HFD)-induced obesity, which mirrors human obesity, and develops hippocampal-dependent cognitive impairment. We assessed hippocampal microglial activation by morphological and single-cell transcriptomic analysis to evaluate this heterogeneous, functionally diverse, and dynamic class of cells over time after 1 and 3 months of HFD. HFD altered cell-to-cell communication, particularly immune modulation and cellular adhesion signaling, and induced a differential gene expression signature of protein processing in the endoplasmic reticulum in a time-dependent manner.
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Affiliation(s)
- Rosemary E. Henn
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - Kai Guo
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - Sarah E. Elzinga
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - Mohamed H. Noureldein
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - Faye E. Mendelson
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - John M. Hayes
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - Diana M. Rigan
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - Masha G. Savelieff
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
| | - Junguk Hur
- Department of Biomedical Sciences, University of North Dakota, Grand Forks, ND, USA
| | - Eva L. Feldman
- Department of Neurology, University of Michigan, Ann Arbor, MI, USA
- NeuroNetwork for Emerging Therapies, University of Michigan, Ann Arbor, MI, USA
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17
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Shahi A, Afzali S, Firoozi Z, Mohaghegh P, Moravej A, Hosseinipour A, Bahmanyar M, Mansoori Y. Potential roles of NLRP3 inflammasome in the pathogenesis of Kawasaki disease. J Cell Physiol 2023; 238:513-532. [PMID: 36649375 DOI: 10.1002/jcp.30948] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 12/12/2022] [Accepted: 01/05/2023] [Indexed: 01/19/2023]
Abstract
There is a heterogeneous group of rare illnesses that fall into the vasculitis category and are characterized mostly by blood vessel inflammation. Ischemia and disrupted blood flow will cause harm to the organs whose blood arteries become inflamed. Kawasaki disease (KD) is the most prevalent kind of vasculitis in children aged 5 years or younger. Because KD's cardiovascular problems might persist into adulthood, it is no longer thought of as a self-limiting disease. KD is a systemic vasculitis with unknown initiating factors. Numerous factors, such as genetic predisposition and infectious pathogens, are implicated in the etiology of KD. As endothelial cell damage and inflammation can lead to coronary endothelial dysfunction in KD, some studies hypothesized the crucial role of pyroptosis in the pathogenesis of KD. Additionally, pyroptosis-related proteins like caspase-1, apoptosis-associated speck-like protein containing a CARD (ASC), proinflammatory cytokines like IL-1 and IL-18, lactic dehydrogenase, and Gasdermin D (GSDMD) have been found to be overexpressed in KD patients when compared to healthy controls. These occurrences may point to an involvement of inflammasomes and pyroptotic cell death in the etiology of KD and suggest potential treatment targets. Based on these shreds of evidence, in this review, we aim to focus on one of the well-defined inflammasomes, NLRP3, and its role in the pathophysiology of KD.
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Affiliation(s)
- Abbas Shahi
- Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Shima Afzali
- Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Firoozi
- Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
- Department of Medical Genetics, Fasa University of Medical Sciences, Fasa, Iran
| | - Poopak Mohaghegh
- Pediatrics Department, School of Medicine, Fasa University of Medical Sciences, Fasa, Iran
| | - Ali Moravej
- Department of Immunology, Fasa University of Medical Sciences, Fasa, Iran
| | - Ali Hosseinipour
- Department of Internal Medicine, Fasa University of Medical Sciences, Fasa, Iran
| | - Maryam Bahmanyar
- Pediatrics Department, School of Medicine, Fasa University of Medical Sciences, Fasa, Iran
| | - Yaser Mansoori
- Noncommunicable Diseases Research Center, Fasa University of Medical Sciences, Fasa, Iran
- Department of Medical Genetics, Fasa University of Medical Sciences, Fasa, Iran
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18
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Crosstalk between fatty acid metabolism and tumour-associated macrophages in cancer progression. Biomedicine (Taipei) 2023; 12:9-19. [PMID: 36816174 PMCID: PMC9910230 DOI: 10.37796/2211-8039.1381] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 06/06/2022] [Indexed: 11/27/2022] Open
Abstract
Over the last few decades, cancer has been regarded as an independent and self sustaining progression. The earliest hallmarks of cancer comprise of sustaining proliferative signalling, avoiding growth suppressors, resisting cell death, enabling replicative immortality, inducing angiogenesis, and activating invasion and metastasis. Nonetheless, two emerging hallmarks are being described: aberrant metabolic pathways and evasion of immune destruction. Changes in tumour cell metabolism are not restricted to tumour cells alone; the products of the altered metabolism have a direct impact on the activity of immune cells inside the tumour microenvironment, particularly tumour-associated macrophages (TAMs). The complicated process of cancer growth is orchestrated by metabolic changes dictating the tight mutual connection between these cells. Here, we discuss approaches to exploit the interaction of cancer cells' abnormal metabolic activity and TAMs. We also describe ways to exploit it by reprogramming fatty acid metabolism via TAMs.
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19
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Capetini VC, Quintanilha BJ, de Oliveira DC, Nishioka AH, de Matos LA, Ferreira LRP, Ferreira FM, Sampaio GR, Hassimotto NMA, Lajolo FM, Fock RA, Rogero MM. Blood orange juice intake modulates plasma and PBMC microRNA expression in overweight and insulin-resistant women: impact on MAPK and NFκB signaling pathways. J Nutr Biochem 2023; 112:109240. [PMID: 36442716 DOI: 10.1016/j.jnutbio.2022.109240] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 07/28/2022] [Accepted: 10/12/2022] [Indexed: 11/27/2022]
Abstract
Blood orange consumption presents potential health benefits and may modulate epigenetic mechanisms such as microRNAs (miRNAs) expression. MiRNAs are non-coding RNAs responsible for post-transcriptional gene regulation, and these molecules can also be used as biomarkers in body fluids. This study was designed to investigate the effect of chronic blood orange juice (BOJ) intake on the inflammatory response and miRNA expression profile in plasma and blood cells in overweight women. The study cohort was comprised of twenty women aged 18-40 years old, diagnosed as overweight, who consumed 500 mL/d of BOJ for four weeks. Clinical data were collected at baseline and after 4 weeks of juice consumption, e.g., anthropometric and hemodynamic parameters, food intake, blood cell count, and metabolic and inflammatory biomarkers. BOJ samples were analyzed and characterized. Additionally, plasma and blood cells were also collected for miRNA expression profiling and evaluation of the expression of genes and proteins in the MAPK and NFκB signaling pathways. BOJ intake increased the expression of miR-144-3p in plasma and the expression of miR-424-5p, miR-144-3p, and miR-130b-3p in peripheral blood mononuclear cells (PBMC). Conversely, the beverage intake decreased the expression of let-7f-5p and miR-126-3p in PBMC. Computational analyses identified different targets of the dysregulated miRNA on inflammatory pathways. Furthermore, BOJ intake increased vitamin C consumption and the pJNK/JNK ratio and decreased the expression of IL6 mRNA and NFκB protein. These results demonstrate that BOJ regulates the expression of genes involved in the inflammatory process and decreases NFкB-protein expression in PBMC.
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Affiliation(s)
- Vinícius Cooper Capetini
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil; Food Research Center (FoRC), CEPID-FAPESP (Research Innovation and Dissemination Centers São Paulo Research Foundation), São Paulo, Brazil
| | - Bruna J Quintanilha
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil; Food Research Center (FoRC), CEPID-FAPESP (Research Innovation and Dissemination Centers São Paulo Research Foundation), São Paulo, Brazil
| | - Dalila Cunha de Oliveira
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Alessandra Harumi Nishioka
- Department of Food Science and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil; Food Research Center (FoRC), CEPID-FAPESP (Research Innovation and Dissemination Centers São Paulo Research Foundation), São Paulo, Brazil
| | - Luciene Assaf de Matos
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Ludmila Rodrigues Pinto Ferreira
- Morphology Department, Institute of Biological Sciences of the Federal University of Minas Gerais (ICB/UFMG), Belo Horizonte, Brazil
| | | | - Geni Rodrigues Sampaio
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil
| | - Neuza Mariko Aymoto Hassimotto
- Department of Food Science and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil; Food Research Center (FoRC), CEPID-FAPESP (Research Innovation and Dissemination Centers São Paulo Research Foundation), São Paulo, Brazil
| | - Franco Maria Lajolo
- Department of Food Science and Experimental Nutrition, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil; Food Research Center (FoRC), CEPID-FAPESP (Research Innovation and Dissemination Centers São Paulo Research Foundation), São Paulo, Brazil
| | - Ricardo Ambrósio Fock
- Department of Clinical and Toxicological Analysis, School of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Marcelo Macedo Rogero
- Department of Nutrition, School of Public Health, University of São Paulo, São Paulo, Brazil; Food Research Center (FoRC), CEPID-FAPESP (Research Innovation and Dissemination Centers São Paulo Research Foundation), São Paulo, Brazil.
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20
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Guimarães ES, Gomes MTR, Sanches RCO, Matteucci KC, Marinho FV, Oliveira SC. The endoplasmic reticulum stress sensor IRE1α modulates macrophage metabolic function during Brucella abortus infection. Front Immunol 2023; 13:1063221. [PMID: 36660548 PMCID: PMC9842658 DOI: 10.3389/fimmu.2022.1063221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/29/2022] [Indexed: 01/04/2023] Open
Abstract
Endoplasmic reticulum (ER) stress plays a major role in several inflammatory disorders. ER stress induces the unfolded protein response (UPR), a conserved response broadly associated with innate immunity and cell metabolic function in various scenarios. Brucella abortus, an intracellular pathogen, triggers the UPR via Stimulator of interferon genes (STING), an important regulator of macrophage metabolism during B. abortus infection. However, whether ER stress pathways underlie macrophage metabolic function during B. abortus infection remains to be elucidated. Here, we showed that the UPR sensor inositol-requiring enzyme 1α (IRE1α) is as an important component regulating macrophage immunometabolic function. In B. abortus infection, IRE1α supports the macrophage inflammatory profile, favoring M1-like macrophages. IRE1α drives the macrophage metabolic reprogramming in infected macrophages, contributing to the reduced oxidative phosphorylation and increased glycolysis. This metabolic reprogramming is probably associated with the IRE1α-dependent expression and stabilization of hypoxia-inducible factor-1 alpha (HIF-1α), an important molecule involved in cell metabolism that sustains the inflammatory profile in B. abortus-infected macrophages. Accordingly, we demonstrated that IRE1α favors the generation of mitochondrial reactive oxygen species (mROS) which has been described as an HIF-1α stabilizing factor. Furthermore, in infected macrophages, IRE1α drives the production of nitric oxide and the release of IL-1β. Collectively, these data unravel a key mechanism linking the UPR and the immunometabolic regulation of macrophages in Brucella infection and highlight IRE1α as a central pathway regulating macrophage metabolic function during infectious diseases.
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Affiliation(s)
- Erika S. Guimarães
- Departamento de Genética, Ecologia e Evolução, Programa de Pós-Graduação em Genética, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Marco Túlio R. Gomes
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Rodrigo C. O. Sanches
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Kely Catarine Matteucci
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
- Plataforma de Medicina Translacional Fundação Oswaldo Cruz/Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, Brazil
| | - Fábio V. Marinho
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Sergio C. Oliveira
- Departamento de Bioquímica e Imunologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Departamento de Imunologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brazil
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21
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de Batista DG, de Batista EG, Miragem AA, Ludwig MS, Heck TG. Disturbance of cellular calcium homeostasis plays a pivotal role in glyphosate-based herbicide-induced oxidative stress. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:9082-9102. [PMID: 36441326 DOI: 10.1007/s11356-022-24361-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 11/17/2022] [Indexed: 06/16/2023]
Abstract
Glyphosate-based herbicides (GBHs) are the most worldwide used pesticides. The wide application of GBHs contaminates the soil and, consequently, water and food resources reaching human consumption. GBHs induce oxidative stress in non-target organisms, leading to a pro-inflammatory and pro-apoptotic cellular status, promoting tissue dysfunction and, thus, metabolic and neurobehavioral changes. This review presents evidence of oxidative damage induced by GBHs and the mechanism of cell damage and health consequences. To summarize, exposure to GBHs may induce disorders in calcium homeostasis related to the activation of ion channels. Also, alterations in pathways related to redox state regulation must have a primordial role in oxidative stress caused by GBHs.
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Affiliation(s)
- Diovana Gelati de Batista
- Research Group in Physiology, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil.
- Postgraduate Program in Integral Attention to Health, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil.
- Research Group in Cell Stress Response, Federal Institute of Education, Science and Technology Farroupilha, Rio Grande Do Sul State, Santa Rosa, Brazil.
- Postgraduate Program in Mathematical and Computational Modeling, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil.
| | - Edivania Gelati de Batista
- Research Group in Cell Stress Response, Federal Institute of Education, Science and Technology Farroupilha, Rio Grande Do Sul State, Santa Rosa, Brazil
| | - Antônio Azambuja Miragem
- Research Group in Cell Stress Response, Federal Institute of Education, Science and Technology Farroupilha, Rio Grande Do Sul State, Santa Rosa, Brazil
| | - Mirna Stela Ludwig
- Research Group in Physiology, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil
- Postgraduate Program in Integral Attention to Health, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil
| | - Thiago Gomes Heck
- Research Group in Physiology, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil
- Postgraduate Program in Integral Attention to Health, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil
- Postgraduate Program in Mathematical and Computational Modeling, Regional University of Northwestern Rio Grande Do Sul State, Rio Grande Do Sul State, Ijuí, Brazil
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22
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Lumbrokinase regulates endoplasmic reticulum stress to improve neurological deficits in ischemic stroke. Neuropharmacology 2022; 221:109277. [DOI: 10.1016/j.neuropharm.2022.109277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 08/30/2022] [Accepted: 09/27/2022] [Indexed: 11/07/2022]
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23
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Wang X, Wu Z, Zeng J, Zhao Y, Zhang C, Yu M, Wang W, Chen X, Chen L, Wang J, Xu L, Zhou J, Tan Q, Wei W, Li Y. Untargeted metabolomics of pulmonary tuberculosis patient serum reveals potential prognostic markers of both latent infection and outcome. Front Public Health 2022; 10:962510. [PMID: 36457328 PMCID: PMC9705731 DOI: 10.3389/fpubh.2022.962510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 10/18/2022] [Indexed: 11/17/2022] Open
Abstract
Currently, there are no particularly effective biomarkers to distinguish between latent tuberculosis infection (LTBI) and active pulmonary tuberculosis (PTB) and evaluate the outcome of TB treatment. In this study, we have characterized the changes in the serum metabolic profiles caused by Mycobacterium tuberculosis (Mtb) infection and standard anti-TB treatment with isoniazid-rifampin-pyrazinamide-ethambutol (HRZE) using GC-MS and LC-MS/MS. Seven metabolites, including 3-oxopalmitic acid, akeboside ste, sulfolithocholic acid, 2-decylfuran (4,8,8-trimethyldecahydro-1,4-methanoazulen-9-yl)methanol, d-(+)-camphor, and 2-methylaminoadenosine, were identified to have significantly higher levels in LTBI and untreated PTB patients (T0) than those in uninfected healthy controls (Un). Among them, akeboside Ste and sulfolithocholic acid were significantly decreased in PTB patients with 2-month HRZE (T2) and cured PTB patients with 2-month HRZE followed by 4-month isoniazid-rifampin (HR) (T6). Receiver operator characteristic curve analysis revealed that the combined diagnostic model showed excellent performance for distinguishing LT from T0 and Un. By analyzing the biochemical and disease-related pathways, we observed that the differential metabolites in the serum of LTBI or TB patients, compared to healthy controls, were mainly involved in glutathione metabolism, ascorbate and aldarate metabolism, and porphyrin and chlorophyll metabolism. The metabolites with significant differences between the T0 group and the T6 group were mainly enriched in niacin and nicotinamide metabolism. Our study provided more detailed experimental data for developing laboratory standards for evaluating LTBI and cured PTB.
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Affiliation(s)
- Xuezhi Wang
- Foshan Fourth People's Hospital, Foshan, China
| | - Zhuhua Wu
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Jincheng Zeng
- Dongguan Key Laboratory of Medical Bioactive Molecular Development and Translational Research, Guangdong Provincial Key Laboratory of Medical Molecular Diagnostics, Guangdong Medical University, Dongguan, China
| | - Yuchuan Zhao
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Chenchen Zhang
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Meiling Yu
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Wei Wang
- Foshan Fourth People's Hospital, Foshan, China
| | - Xunxun Chen
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Liang Chen
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Jiawen Wang
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Liuyue Xu
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China
| | - Jie Zhou
- Foshan Fourth People's Hospital, Foshan, China
| | - Qiuchan Tan
- Dongguan Key Laboratory of Medical Bioactive Molecular Development and Translational Research, Guangzhou Health Science College, Guangzhou, China,Qiuchan Tan
| | - Wenjing Wei
- Center for Tuberculosis Control of Guangdong Province, Guangzhou, China,Wenjing Wei
| | - Yanxia Li
- Foshan Fourth People's Hospital, Foshan, China,*Correspondence: Yanxia Li
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24
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He W, Tran A, Chen CT, Loganathan N, Bazinet RP, Belsham DD. Oleate restores altered autophagic flux to rescue palmitate lipotoxicity in hypothalamic neurons. Mol Cell Endocrinol 2022; 557:111753. [PMID: 35981630 DOI: 10.1016/j.mce.2022.111753] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/29/2022] [Accepted: 08/10/2022] [Indexed: 01/18/2023]
Abstract
Accumulation of excess lipids in non-adipose tissues, such as the hypothalamus, is termed lipotoxicity and causative of free fatty acid-mediated pathology in metabolic disease. This study aimed to elucidate the molecular mechanisms behind oleate (OA)- and palmitate (PA)-mediated changes in hypothalamic neurons. Using the well-characterized hypothalamic neuronal cell model, mHypoE-46, we assessed gene changes through qRT-PCR, cell death with quantitative imaging, PA metabolism using stable isotope labeling, and cellular mechanisms using pharmacological modulation of lipid metabolism and autophagic flux. Palmitate (PA) disrupts gene expression, including Npy, Grp78, and Il-6 mRNA in mHypoE-46 hypothalamic neurons. Blocking PA metabolism using triacsin-C prevented the increase of these genes, implying that these changes depend on PA intracellular metabolism. Co-incubation with oleate (OA) is also potently protective and prevents cell death induced by increasing concentrations of PA. However, OA does not decrease U-13C-PA incorporation into diacylglycerol and phospholipids. Remarkably, OA can reverse PA toxicity even after significant PA metabolism and cellular impairment. OA can restore PA-mediated impairment of autophagy to prevent or reverse the accumulation of PA metabolites through lysosomal degradation, and not through other reported mechanisms. The autophagic flux inhibitor chloroquine (CQ) mimics PA toxicity by upregulating autophagy-related genes, Npy, Grp78, and Il-6, an effect partially reversed by OA. CQ also prevented the OA defense against PA toxicity, whereas the autophagy inducer rapamycin provided some protection. Thus, PA impairment of autophagic flux significantly contributes to its lipotoxicity, and OA-mediated protection requires functional autophagy. Overall, our results suggest that impairment of autophagy contributes to hypothalamic lipotoxicity.
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Affiliation(s)
- Wenyuan He
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Andy Tran
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Chuck T Chen
- Department of Nutritional Sciences, University of Toronto, Ontario, Canada
| | | | - Richard P Bazinet
- Department of Nutritional Sciences, University of Toronto, Ontario, Canada
| | - Denise D Belsham
- Department of Physiology, University of Toronto, Ontario, Canada; Department of Medicine, University of Toronto, Ontario, Canada; Department of Obstetrics and Gynaecology, University of Toronto, Ontario, Canada.
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25
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Abstract
PURPOSE OF REVIEW HIV and antiretroviral therapy (ART) use are linked to an increased incidence of atherosclerotic cardiovascular disease (ASCVD). Immune activation persists in ART-treated people with HIV (PWH), and markers of inflammation (i.e. IL-6, C-reactive protein) predict mortality in this population. This review discusses underlying mechanisms that likely contribute to inflammation and the development of ASCVD in PWH. RECENT FINDINGS Persistent inflammation contributes to accelerated ASCVD in HIV and several new insights into the underlying immunologic mechanisms of chronic inflammation in PWH have been made (e.g. clonal haematopoiesis, trained immunity, lipidomics). We will also highlight potential pro-inflammatory mechanisms that may differ in vulnerable populations, including women, minorities and children. SUMMARY Mechanistic studies into the drivers of chronic inflammation in PWH are ongoing and may aid in tailoring effective therapeutic strategies that can reduce ASCVD risk in this population. Focus should also include factors that lead to persistent disparities in HIV care and comorbidities, including sex as a biological factor and social determinants of health. It remains unclear whether ASCVD progression in HIV is driven by unique mediators (HIV itself, ART, immunodeficiency), or if it is an accelerated version of disease progression seen in the general population.
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Affiliation(s)
- Sahera Dirajlal-Fargo
- Rainbow Babies and Children’s Hospital, Cleveland, OH
- Case Western Reserve University, Cleveland, OH
| | - Nicholas Funderburg
- School of Health and Rehabilitation Sciences, The Ohio State University, Columbus, OH
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26
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Signaling pathways in obesity: mechanisms and therapeutic interventions. Signal Transduct Target Ther 2022; 7:298. [PMID: 36031641 PMCID: PMC9420733 DOI: 10.1038/s41392-022-01149-x] [Citation(s) in RCA: 84] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/26/2022] [Accepted: 08/08/2022] [Indexed: 12/19/2022] Open
Abstract
Obesity is a complex, chronic disease and global public health challenge. Characterized by excessive fat accumulation in the body, obesity sharply increases the risk of several diseases, such as type 2 diabetes, cardiovascular disease, and nonalcoholic fatty liver disease, and is linked to lower life expectancy. Although lifestyle intervention (diet and exercise) has remarkable effects on weight management, achieving long-term success at weight loss is extremely challenging, and the prevalence of obesity continues to rise worldwide. Over the past decades, the pathophysiology of obesity has been extensively investigated, and an increasing number of signal transduction pathways have been implicated in obesity, making it possible to fight obesity in a more effective and precise way. In this review, we summarize recent advances in the pathogenesis of obesity from both experimental and clinical studies, focusing on signaling pathways and their roles in the regulation of food intake, glucose homeostasis, adipogenesis, thermogenesis, and chronic inflammation. We also discuss the current anti-obesity drugs, as well as weight loss compounds in clinical trials, that target these signals. The evolving knowledge of signaling transduction may shed light on the future direction of obesity research, as we move into a new era of precision medicine.
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27
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Macrophage Polarization Mediated by Mitochondrial Dysfunction Induces Adipose Tissue Inflammation in Obesity. Int J Mol Sci 2022; 23:ijms23169252. [PMID: 36012516 PMCID: PMC9409464 DOI: 10.3390/ijms23169252] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Revised: 08/10/2022] [Accepted: 08/12/2022] [Indexed: 12/06/2022] Open
Abstract
Obesity is one of the prominent global health issues, contributing to the growing prevalence of insulin resistance and type 2 diabetes. Chronic inflammation in adipose tissue is considered as a key risk factor for the development of insulin resistance and type 2 diabetes in obese individuals. Macrophages are the most abundant immune cells in adipose tissue and play an important role in adipose tissue inflammation. Mitochondria are critical for regulating macrophage polarization, differentiation, and survival. Changes to mitochondrial metabolism and physiology induced by extracellular signals may underlie the corresponding state of macrophage activation. Macrophage mitochondrial dysfunction is a key mediator of obesity-induced macrophage inflammatory response and subsequent systemic insulin resistance. Mitochondrial dysfunction drives the activation of the NLRP3 inflammasome, which induces the release of IL-1β. IL-1β leads to decreased insulin sensitivity of insulin target cells via paracrine signaling or infiltration into the systemic circulation. In this review, we discuss the new findings on how obesity induces macrophage mitochondrial dysfunction and how mitochondrial dysfunction induces NLRP3 inflammasome activation. We also summarize therapeutic approaches targeting mitochondria for the treatment of diabetes.
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28
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Yang R, Chen J, Jia Q, Yang X, Mehmood S. Epigallocatechin-3-gallate ameliorates renal endoplasmic reticulum stress-mediated inflammation in type 2 diabetic rats. Exp Biol Med (Maywood) 2022; 247:1410-1419. [PMID: 35775606 PMCID: PMC9493765 DOI: 10.1177/15353702221106479] [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: 02/03/2023] Open
Abstract
Epigallocatechin-3-gallate (EGCG), an essential polyphenolic constituent found in tea leaves, possesses various potent biological activities. This research was undertaken to investigate the impact of EGCG against endoplasmic reticulum (ER) stress-mediated inflammation and to clarify the underlying molecular mechanism in type 2 diabetic kidneys. The male rats were randomized into four groups: normal, diabetic, low-dose EGCG, and high-dose EGCG. In type 2 diabetic rats, hyperglycemia and hyperlipidemia noticeably caused renal structural damage and dysfunction and aggravated ER stress. Meanwhile, sustained ER stress activated the NOD-like receptor family pyrin domain containing 3 (NLRP3) inflammasome and then upregulated the contents of inflammatory cytokines in the diabetic kidney. Following supplementation with 40 mg/kg and 80 mg/kg EGCG, hyperglycemia, hyperlipidemia, and renal histopathological alterations and dysfunction were noticeably ameliorated; renal ER stress, NLRP3 inflammasome, and inflammatory response were markedly repressed in the EGCG treatment groups. In summary, the current study highlighted the renoprotective effects of EGCG in type 2 diabetes and its mechanisms are mainly associated with the repression of ER stress-mediated NLRP3 inflammasome overactivation.
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Affiliation(s)
- Rui Yang
- School of Life Sciences, Hefei Normal
University, Hefei 230601, China
| | - Jinwu Chen
- School of Life Sciences, Hefei Normal
University, Hefei 230601, China;,Anhui Province Key Laboratory of
Medical Physics and Technology, Institute of Health & Medical Technology, Hefei
Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031,
China
| | - Qiang Jia
- Department of Physiology, Bengbu
Medical College, Bengbu 233030, China;,Qiang Jia.
| | - Xingxing Yang
- School of Life Sciences, Hefei Normal
University, Hefei 230601, China
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29
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Liu Y, Wu Y, Jiang M. The emerging roles of PHOSPHO1 and its regulated phospholipid homeostasis in metabolic disorders. Front Physiol 2022; 13:935195. [PMID: 35957983 PMCID: PMC9360546 DOI: 10.3389/fphys.2022.935195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 07/07/2022] [Indexed: 11/25/2022] Open
Abstract
Emerging evidence suggests that phosphoethanolamine/phosphocholine phosphatase 1 (PHOSPHO1), a specific phosphoethanolamine and phosphocholine phosphatase, is involved in energy metabolism. In this review, we describe the structure and regulation of PHOSPHO1, as well as current knowledge about the role of PHOSPHO1 and its related phospholipid metabolites in regulating energy metabolism. We also examine mechanistic evidence of PHOSPHO1- and phospholipid-mediated regulation of mitochondrial and lipid droplets functions in the context of metabolic homeostasis, which could be potentially targeted for treating metabolic disorders.
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Affiliation(s)
- Yi Liu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Yingting Wu
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Mengxi Jiang
- Department of Pharmacology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
- Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
- *Correspondence: Mengxi Jiang,
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30
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Yu M, Zhou M, Li J, Zong R, Yan Y, Kong L, Zhu Q, Li C. Notch-activated mesenchymal stromal/stem cells enhance the protective effect against acetaminophen-induced acute liver injury by activating AMPK/SIRT1 pathway. Stem Cell Res Ther 2022; 13:318. [PMID: 35842731 PMCID: PMC9288678 DOI: 10.1186/s13287-022-02999-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 04/22/2022] [Indexed: 12/03/2022] Open
Abstract
Background Notch signaling plays important roles in regulating innate immunity. However, little is known about the role of Notch in mesenchymal stromal/stem cell (MSC)-mediated immunomodulation during liver inflammatory response. Methods Notch activation in human umbilical cord-derived MSCs was performed by a tissue culture plate coated with Notch ligand, recombinant human Jagged1 (JAG1). Mice were given intravenous injection of Notch-activated MSCs after acetaminophen (APAP)-induced acute liver injury. Liver tissues were collected and analyzed by histology and immunohistochemistry. Results MSC administration reduced APAP-induced hepatocellular damage, as manifested by decreased serum ALT levels, intrahepatic macrophage/neutrophil infiltration, hepatocellular apoptosis and proinflammatory mediators. The anti-inflammatory activity and therapeutic effects of MSCs were greatly enhanced by Notch activation via its ligand JAG1. However, Notch2 disruption in MSCs markedly diminished the protective effect of MSCs against APAP-induced acute liver injury, even in the presence of JAG1 pretreatment. Strikingly, Notch-activated MSCs promoted AMP-activated protein kinase (AMPKα) phosphorylation, increased the sirtuins 1 (SIRT1) deacetylase expression, but downregulated spliced X-box-binding protein 1 (XBP1s) expression and consequently reduced NLR family pyrin domain-containing 3 (NLRP3) inflammasome activation. Furthermore, SIRT1 disruption or XBP1s overexpression in macrophages exacerbated APAP-triggered liver inflammation and augmented NLRP3/caspase-1 activity in MSC-administrated mice. Mechanistic studies further demonstrated that JAG1-pretreated MSCs activated Notch2/COX2/PGE2 signaling, which in turn induced macrophage AMPK/SIRT1 activation, leading to XBP1s deacetylation and inhibition of NLRP3 activity. Conclusions Activation of Notch2 is required for the ability of MSCs to reduce the severity of APAP-induced liver damage in mice. Our findings underscore a novel molecular insights into MSCs-mediated immunomodulation by activating Notch2/COX2/AMPK/SIRT1 pathway and thus provide a new strategy for the treatment of liver inflammatory diseases. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-02999-6.
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Affiliation(s)
- Mengxue Yu
- Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.,Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Min Zhou
- Neurocritical Care Unit, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, China
| | - Jiahui Li
- Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.,Department of Anatomy and Histology Embryology, Jinzhou Medical University, Jinzhou, China
| | - Ruobin Zong
- Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Yufei Yan
- Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Liangyi Kong
- Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China
| | - Qiang Zhu
- Children's Hospital of Nanjing Medical University, Nanjing, China.
| | - Changyong Li
- Department of Physiology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, China.
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31
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Markussen LK, Rondini EA, Johansen OS, Madsen JGS, Sustarsic EG, Marcher AB, Hansen JB, Gerhart-Hines Z, Granneman JG, Mandrup S. Lipolysis regulates major transcriptional programs in brown adipocytes. Nat Commun 2022; 13:3956. [PMID: 35803907 PMCID: PMC9270495 DOI: 10.1038/s41467-022-31525-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/17/2022] [Indexed: 02/06/2023] Open
Abstract
β-Adrenergic signaling is a core regulator of brown adipocyte function stimulating both lipolysis and transcription of thermogenic genes, thereby expanding the capacity for oxidative metabolism. We have used pharmacological inhibitors and a direct activator of lipolysis to acutely modulate the activity of lipases, thereby enabling us to uncover lipolysis-dependent signaling pathways downstream of β-adrenergic signaling in cultured brown adipocytes. Here we show that induction of lipolysis leads to acute induction of several gene programs and is required for transcriptional regulation by β-adrenergic signals. Using machine-learning algorithms to infer causal transcription factors, we show that PPARs are key mediators of lipolysis-induced activation of genes involved in lipid metabolism and thermogenesis. Importantly, however, lipolysis also activates the unfolded protein response and regulates the core circadian transcriptional machinery independently of PPARs. Our results demonstrate that lipolysis generates important metabolic signals that exert profound pleiotropic effects on transcription and function of cultured brown adipocytes.
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Affiliation(s)
- Lasse K Markussen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
- Center for Adipocyte Signaling (AdipoSign), Odense, Denmark
- Center for Functional Genomics and Tissue Plasticity (ATLAS), Odense, Denmark
| | - Elizabeth A Rondini
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI, USA
| | - Olivia Sveidahl Johansen
- Center for Adipocyte Signaling (AdipoSign), Odense, Denmark
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
- Embark Biotech ApS, Copenhagen, Denmark
| | - Jesper G S Madsen
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
- Center for Functional Genomics and Tissue Plasticity (ATLAS), Odense, Denmark
| | - Elahu G Sustarsic
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Ann-Britt Marcher
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark
- Center for Adipocyte Signaling (AdipoSign), Odense, Denmark
- Center for Functional Genomics and Tissue Plasticity (ATLAS), Odense, Denmark
| | - Jacob B Hansen
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Zachary Gerhart-Hines
- Center for Adipocyte Signaling (AdipoSign), Odense, Denmark
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
- Embark Biotech ApS, Copenhagen, Denmark
| | - James G Granneman
- Center for Molecular Medicine and Genetics, Wayne State University, Detroit, MI, USA.
| | - Susanne Mandrup
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense, Denmark.
- Center for Adipocyte Signaling (AdipoSign), Odense, Denmark.
- Center for Functional Genomics and Tissue Plasticity (ATLAS), Odense, Denmark.
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32
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Bowman ER, Wilson M, Riedl KM, MaWhinney S, Jankowski CM, Funderburg NT, Erlandson KM. Lipidome Alterations with Exercise Among People With and Without HIV: An Exploratory Study. AIDS Res Hum Retroviruses 2022; 38:544-551. [PMID: 35302400 PMCID: PMC9297322 DOI: 10.1089/aid.2021.0154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Age-related comorbidities and physical function impairments in aging people with HIV (PWH) can be improved through exercise interventions. The mechanisms underlying these improvements, including lipidomic changes, are unknown. Sedentary adults (50-75 years old) with or without HIV participated in supervised endurance/resistance exercise for 24 weeks. Plasma lipid concentrations (∼1,200 lipid species from 13 lipid classes) at baseline and week 24 were measured by mass spectrometry. Given multiple comparisons, unadjusted and Benjamini-Hochberg corrected p values are reported. Analyses are considered exploratory. Twenty-five PWH and 24 controls had paired samples at baseline and week 24. The change in total triacylglycerol (TAG) concentrations after exercise intervention differed between groups (unadj-p = 0.006, adj-p = 0.078) with concentrations increasing among controls, but not among PWH. Changes in concentrations of TAG species composed of long-chain fatty acids differed between groups (unadj-p < 0.04) with increases among controls, but not among PWH. Changes in total diacylglycerol (DAG) concentration from baseline to week 24 differed between groups (unadj-p = 0.03, adj-p = 0.2) with an increase in PWH and a nonsignificant decrease in controls. Baseline to week 24 changes in DAGs composed of palmitic acid (16:0), palmitoleic acid (16:1), and stearic acid (18:0) differed by serostatus (unadj-p = 0.009-0.03; adj-p 0.10-0.12), with nonsignificant increases and decreases in concentrations in PWH and controls, respectively. Concentrations of individual lysophosphatidylcholine (LPC) and ceramide (CER) species also differed by HIV serostatus (unadj-p < = 0.05). Although exploratory, the effects of exercise on the lipidome may differ among people with and without HIV, potentially due to underlying alterations in lipid processing and fatty acid oxidation in PWH. Clinical Trials NCT02404792.
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Affiliation(s)
- Emily R. Bowman
- College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Melissa Wilson
- Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Kenneth M. Riedl
- College of Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Samantha MaWhinney
- Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | - Catherine M. Jankowski
- Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
| | | | - Kristine M. Erlandson
- Department of Medicine, University of Colorado, Anschutz Medical Campus, Aurora, Colorado, USA
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33
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Shah SA, Echols JT, Sun C, Wolf MJ, Epstein FH. Accelerated fatty acid composition MRI of epicardial adipose tissue: Development and application to eplerenone treatment in a mouse model of obesity-induced coronary microvascular disease. Magn Reson Med 2022; 88:1734-1747. [PMID: 35726367 PMCID: PMC9339514 DOI: 10.1002/mrm.29348] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 04/23/2022] [Accepted: 05/16/2022] [Indexed: 01/10/2023]
Abstract
Purpose To develop an accelerated MRI method to quantify the epicardial adipose tissue (EAT) fatty acid composition (FAC) and test the hypothesis that eplerenone (EPL) shifts the EAT FAC toward unsaturation in obese mice. Methods Undersampled multi‐echo gradient echo imaging employing a dictionary‐based compressed‐sensing reconstruction and iterative decomposition with echo asymmetry and least‐squares–based mapping (IDEAL) was developed, validated, and used to study EAT in obese mice scanned at 7T. Fully sampled and rate 2, 2.5, 3, and 3.5 undersampled image data were acquired, reconstructed, and assessed using RMSE and structural similarity (SSIM). Two groups of mice were studied: untreated (control, n = 10) and EPL‐treated (n = 10) mice fed a high‐fat high‐sucrose diet. MRI included imaging of EAT FAC, EAT volume, and myocardial perfusion reserve. Results Rate 3 acceleration provided RMSE <5% and structural similarity >0.85 for FAC MRI. After 6 weeks of diet, EPL‐treated compared to untreated mice had a reduced EAT saturated fatty acid fraction (0.27 ± 0.09 vs. 0.39 ± 0.07, P < 0.05) and increased EAT unsaturation degree (4.37 ± 0.32 vs. 3.69 ± 0.58, P < 0.05). Also, EAT volume in EPL‐treated compared to untreated mice was reduced (8.1 ± 0.6 mg vs. 11.4 ± 0.7 mg, P < 0.01), and myocardial perfusion reserve was improved (1.83 ± 0.15 vs. 1.61 ± 0.17, P < 0.05). Conclusion Rate 3 accelerated FAC MRI enabled accurate quantification of EAT FAC in mice. EPL treatment shifted the EAT FAC toward increased unsaturation and was associated with improvement of coronary microvascular function. Click here for author‐reader discussions
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Affiliation(s)
- Soham A Shah
- Biomedical Engineering, University of Virginia, Charlottesville, VA
| | - John T Echols
- Biomedical Engineering, University of Virginia, Charlottesville, VA
| | - Changyu Sun
- Biomedical Engineering, University of Virginia, Charlottesville, VA.,Biomedical, Biological & Chemical Engineering, University of Missouri, Columbia, MO.,Radiolgy, University of Missouri, Columbia, MO
| | - Matthew J Wolf
- Cardiovascular Medicine, University of Virginia, Charlottesville, VA
| | - Frederick H Epstein
- Biomedical Engineering, University of Virginia, Charlottesville, VA.,Radiology, University of Virginia, Charlottesville, VA
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34
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Ishaq A, Tchkonia T, Kirkland JL, Siervo M, Saretzki G. Palmitate induces DNA damage and senescence in human adipocytes in vitro that can be alleviated by oleic acid but not inorganic nitrate. Exp Gerontol 2022; 163:111798. [PMID: 35390489 PMCID: PMC9214712 DOI: 10.1016/j.exger.2022.111798] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/28/2022] [Accepted: 03/31/2022] [Indexed: 11/22/2022]
Abstract
Hypertrophy in white adipose tissue (WAT) can result in sustained systemic inflammation, hyperlipidaemia, insulin resistance, and onset of senescence in adipocytes. Inflammation and hypertrophy can be induced in vitro using palmitic acid (PA). WAT adipocytes have innately low β-oxidation capacity, while inorganic nitrate can promote a beiging phenotype, with promotion of β-oxidation when cells are exposed to nitrate during differentiation. We hypothesized that treatment of human adipocytes with PA in vitro can induce senescence, which might be attenuated by nitrate treatment through stimulation of β-oxidation to remove accumulated lipids. Differentiated subcutaneous and omental adipocytes were treated with PA and nitrate and senescence markers were analyzed. PA induced DNA damage and increased p16INK4a levels in both human subcutaneous and omental adipocytes in vitro. However, lipid accumulation and lipid droplet size increased after PA treatment only in subcutaneous adipocytes. Thus, hypertrophy and senescence seem not to be causally associated. Contrary to our expectations, subsequent treatment of PA-induced adipocytes with nitrate did not attenuate PA-induced lipid accumulation or senescence. Instead, we found a significantly beneficial effect of oleic acid (OA) on human subcutaneous adipocytes when applied together with PA, which reduced the DNA damage caused by PA treatment.
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Affiliation(s)
- Abbas Ishaq
- Biosciences Institute, Campus for Ageing and Vitality, Newcastle upon Tyne, UK
| | - Tamara Tchkonia
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, United States of America
| | - James L Kirkland
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, United States of America
| | - Mario Siervo
- Human Nutrition Research Centre, Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK; School of Life Sciences, University of Nottingham, Queen's Medical Centre, Nottingham, UK
| | - Gabriele Saretzki
- Biosciences Institute, Campus for Ageing and Vitality, Newcastle upon Tyne, UK.
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35
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Lipke K, Kubis-Kubiak A, Piwowar A. Molecular Mechanism of Lipotoxicity as an Interesting Aspect in the Development of Pathological States-Current View of Knowledge. Cells 2022; 11:cells11050844. [PMID: 35269467 PMCID: PMC8909283 DOI: 10.3390/cells11050844] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 02/22/2022] [Accepted: 02/25/2022] [Indexed: 02/06/2023] Open
Abstract
Free fatty acids (FFAs) play numerous vital roles in the organism, such as contribution to energy generation and reserve, serving as an essential component of the cell membrane, or as ligands for nuclear receptors. However, the disturbance in fatty acid homeostasis, such as inefficient metabolism or intensified release from the site of storage, may result in increased serum FFA levels and eventually result in ectopic fat deposition, which is unfavorable for the organism. The cells are adjusted for the accumulation of FFA to a limited extent and so prolonged exposure to elevated FFA levels results in deleterious effects referred to as lipotoxicity. Lipotoxicity contributes to the development of diseases such as insulin resistance, diabetes, cardiovascular diseases, metabolic syndrome, and inflammation. The nonobvious organs recognized as the main lipotoxic goal of action are the pancreas, liver, skeletal muscles, cardiac muscle, and kidneys. However, lipotoxic effects to a significant extent are not organ-specific but affect fundamental cellular processes occurring in most cells. Therefore, the wider perception of cellular lipotoxic mechanisms and their interrelation may be beneficial for a better understanding of various diseases’ pathogenesis and seeking new pharmacological treatment approaches.
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36
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Yildirim Z, Baboo S, Hamid SM, Dogan AE, Tufanli O, Robichaud S, Emerton C, Diedrich JK, Vatandaslar H, Nikolos F, Gu Y, Iwawaki T, Tarling E, Ouimet M, Nelson DL, Yates JR, Walter P, Erbay E. Intercepting IRE1 kinase-FMRP signaling prevents atherosclerosis progression. EMBO Mol Med 2022; 14:e15344. [PMID: 35191199 PMCID: PMC8988208 DOI: 10.15252/emmm.202115344] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 12/15/2022] Open
Abstract
Fragile X Mental Retardation protein (FMRP), widely known for its role in hereditary intellectual disability, is an RNA‐binding protein (RBP) that controls translation of select mRNAs. We discovered that endoplasmic reticulum (ER) stress induces phosphorylation of FMRP on a site that is known to enhance translation inhibition of FMRP‐bound mRNAs. We show ER stress‐induced activation of Inositol requiring enzyme‐1 (IRE1), an ER‐resident stress‐sensing kinase/endoribonuclease, leads to FMRP phosphorylation and to suppression of macrophage cholesterol efflux and apoptotic cell clearance (efferocytosis). Conversely, FMRP deficiency and pharmacological inhibition of IRE1 kinase activity enhances cholesterol efflux and efferocytosis, reducing atherosclerosis in mice. Our results provide mechanistic insights into how ER stress‐induced IRE1 kinase activity contributes to macrophage cholesterol homeostasis and suggests IRE1 inhibition as a promising new way to counteract atherosclerosis.
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Affiliation(s)
- Zehra Yildirim
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,Department of Molecular Biology and Genetics, National Nanotechnology Center, Bilkent University, Ankara, Turkey
| | - Sabyasachi Baboo
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Syed M Hamid
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Asli E Dogan
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,Department of Molecular Biology and Genetics, National Nanotechnology Center, Bilkent University, Ankara, Turkey
| | - Ozlem Tufanli
- Lagone Medical Center, New York University, New York, NY, USA
| | - Sabrina Robichaud
- Department of Biochemistry, Microbiology and Immunology, Heart Institute, University of Ottawa, Ottawa, ON, Canada
| | - Christina Emerton
- Department of Biochemistry, Microbiology and Immunology, Heart Institute, University of Ottawa, Ottawa, ON, Canada
| | - Jolene K Diedrich
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Hasan Vatandaslar
- Institute of Molecular Health Sciences, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland
| | - Fotis Nikolos
- Samuel Oschin Cancer Center, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Yanghong Gu
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Takao Iwawaki
- Department of Life Science, Medical Research Institute, Kanazawa Medical University, Ishikawa, Japan
| | - Elizabeth Tarling
- Department of Biochemistry and Biophysics, Howard Hughes Medical Institute, University of California at San Francisco, San Francisco, CA, USA
| | - Mireille Ouimet
- Department of Biochemistry, Microbiology and Immunology, Heart Institute, University of Ottawa, Ottawa, ON, Canada
| | - David L Nelson
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - John R Yates
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Peter Walter
- Department of Biochemistry and Biophysics, Howard Hughes Medical Institute, University of California at San Francisco, San Francisco, CA, USA
| | - Ebru Erbay
- Department of Cardiology, Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA.,David Geffen School of Medicine, University of California at Los Angeles, Los Angeles, CA, USA
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37
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Marek-Iannucci S, Yildirim AD, Hamid SM, Ozdemir AB, Gomez AC, Kocatürk B, Porritt RA, Fishbein MC, Iwawaki T, Noval Rivas M, Erbay E, Arditi M. Targeting IRE1 endoribonuclease activity alleviates cardiovascular lesions in a murine model of Kawasaki disease vasculitis. JCI Insight 2022; 7:157203. [PMID: 35167493 PMCID: PMC8986066 DOI: 10.1172/jci.insight.157203] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 02/09/2022] [Indexed: 11/17/2022] Open
Abstract
Kawasaki disease (KD) is the leading cause of non-congenital heart disease in children. Studies in mice and humans propound the NLRP3-IL-1β pathway as the principal driver of KD pathophysiology. Endoplasmic reticulum (ER) stress can activate the NLRP3 inflammasome, but the potential implication of ER stress in KD pathophysiology has not been investigated. We used human patient data and the Lactobacillus casei cell wall extract (LCWE) murine model of KD vasculitis to characterize the impact of ER stress on the development of cardiovascular lesions. KD patient transcriptomics and single-cell RNA sequencing of the abdominal aorta from LCWE-injected mice revealed changes in the expression of ER stress genes. Alleviating ER stress genetically, by conditional deletion of Inositol Requiring Enzyme-1 (IRE1) in myeloid cells, or pharmacologically, by inhibition of IRE1 endoribonuclease (RNase) activity, led to significant reduction of LCWE-induced cardiovascular lesion formation as well as reduced caspase-1 activity and IL-1β secretion. These results demonstrate the causal relationship of ER stress to KD pathogenesis, and highlight IRE1 RNase activity as a potential new therapeutic target.
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Affiliation(s)
- Stefanie Marek-Iannucci
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Asli D Yildirim
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Syed M Hamid
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Asli B Ozdemir
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Angela C Gomez
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Begüm Kocatürk
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Rebecca A Porritt
- Department of Biomedical Sciences, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | | | - Takao Iwawaki
- Department of Life Science, Medical Research Institute, Kanazawa Medical University, Kahoku, Japan
| | - Magali Noval Rivas
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Ebru Erbay
- Smidt Heart Institute, Cedars-Sinai Medical Center, Los Angeles, United States of America
| | - Moshe Arditi
- Cedars-Sinai Medical Center, Los Angeles, United States of America
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38
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Liao J, Hu Z, Li Q, Li H, Chen W, Huo H, Han Q, Zhang H, Guo J, Hu L, Pan J, Li Y, Tang Z. Endoplasmic Reticulum Stress Contributes to Copper-Induced Pyroptosis via Regulating the IRE1α-XBP1 Pathway in Pig Jejunal Epithelial Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:1293-1303. [PMID: 35075900 DOI: 10.1021/acs.jafc.1c07927] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Copper (Cu) is a common additive in food products, which poses a potential concern to animal and human health when it is in excess. Here, we investigated the relationship between endoplasmic reticulum (ER) stress and pyroptosis in Cu-induced toxicity of jejunum in vivo and in vitro. In in vivo experiments, excess intake of dietary Cu caused ER cavity expansion, elevated fluorescence signals of GRP78 and Caspase-1, and increased the mRNA and protein expression levels related to ER stress and pyroptosis in pig jejunal epithelium. Simultaneously, similar effects were observed in IPEC-J2 cells under excess Cu treatment. Importantly, 4-phenylbutyric acid (ER stress inhibitor) and MKC-3946 (IRE1α inhibitor) significantly inhibited the ER stress-triggered IRE1α-XBP1 pathway, which also alleviated the Cu-induced pyroptosis in IPEC-J2 cells. In general, these results suggested that ER stress participated in regulating Cu-induced pyroptosis in jejunal epithelial cells via the IRE1α-XBP1 pathway, which provided a novel view into the toxicology of Cu.
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Affiliation(s)
- Jianzhao Liao
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Zhuoying Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Quanwei Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Hongji Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Weijin Chen
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Haihua Huo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Qingyue Han
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Hui Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Jianying Guo
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Lianmei Hu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Jiaqiang Pan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Ying Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
| | - Zhaoxin Tang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510642, Guangdong, P. R. China
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39
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Kotlyarov S, Kotlyarova A. Involvement of Fatty Acids and Their Metabolites in the Development of Inflammation in Atherosclerosis. Int J Mol Sci 2022; 23:ijms23031308. [PMID: 35163232 PMCID: PMC8835729 DOI: 10.3390/ijms23031308] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/14/2022] [Accepted: 01/21/2022] [Indexed: 02/06/2023] Open
Abstract
Despite all the advances of modern medicine, atherosclerosis continues to be one of the most important medical and social problems. Atherosclerosis is the cause of several cardiovascular diseases, which are associated with high rates of disability and mortality. The development of atherosclerosis is associated with the accumulation of lipids in the arterial intima and the disruption of mechanisms that maintain the balance between the development and resolution of inflammation. Fatty acids are involved in many mechanisms of inflammation development and maintenance. Endothelial cells demonstrate multiple cross-linkages between lipid metabolism and innate immunity. In addition, these processes are linked to hemodynamics and the function of other cells in the vascular wall, highlighting the central role of the endothelium in vascular biology.
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Affiliation(s)
- Stanislav Kotlyarov
- Department of Nursing, Ryazan State Medical University, 390026 Ryazan, Russia
- Correspondence:
| | - Anna Kotlyarova
- Department of Pharmacology and Pharmacy, Ryazan State Medical University, 390026 Ryazan, Russia;
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40
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Modulatory Properties of Food and Nutraceutical Components Targeting NLRP3 Inflammasome Activation. Nutrients 2022; 14:nu14030490. [PMID: 35276849 PMCID: PMC8840562 DOI: 10.3390/nu14030490] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 01/16/2022] [Accepted: 01/20/2022] [Indexed: 12/27/2022] Open
Abstract
Inflammasomes are key intracellular multimeric proteins able to initiate the cellular inflammatory signaling pathway. NLRP3 inflammasome represents one of the main protein complexes involved in the development of inflammatory events, and its activity has been largely demonstrated to be connected with inflammatory or autoinflammatory disorders, including diabetes, gouty arthritis, liver fibrosis, Alzheimer’s disease, respiratory syndromes, atherosclerosis, and cancer initiation. In recent years, it has been demonstrated how dietary intake and nutritional status represent important environmental elements that can modulate metabolic inflammation, since food matrices are an important source of several bioactive compounds. In this review, an updated status of knowledge regarding food bioactive compounds as NLRP3 inflammasome modulators is discussed. Several chemical classes, namely polyphenols, organosulfurs, terpenes, fatty acids, proteins, amino acids, saponins, sterols, polysaccharides, carotenoids, vitamins, and probiotics, have been shown to possess NLRP3 inflammasome-modulating activity through in vitro and in vivo assays, mainly demonstrating an anti-NLRP3 inflammasome activity. Plant foods are particularly rich in important bioactive compounds, each of them can have different effects on the pathway of inflammatory response, confirming the importance of the nutritional pattern (food model) as a whole rather than any single nutrient or functional compound.
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41
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Lisco G, Giagulli VA, De Pergola G, Guastamacchia E, Jirillo E, Triggiani V. The Pathogenic Role of Foam Cells in Atherogenesis: Do They Represent Novel Therapeutic Targets? Endocr Metab Immune Disord Drug Targets 2022; 22:765-777. [PMID: 34994321 DOI: 10.2174/1871530322666220107114313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/09/2021] [Accepted: 12/15/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Foam cells, mainly derived from monocytes-macrophages, contain lipid droplets essentially composed of cholesterol in their cytoplasm. They infiltrate the intima of arteries, contributing to the formation of atherosclerotic plaques. PATHOGENESIS Foam cells damage the arterial cell wall via the release of proinflammatory cytokines, free radicals, and matrix metalloproteinases, enhancing the plaque size up to its rupture. THERAPY A correct dietary regimen seems to be the most appropriate therapeutic approach to minimize obesity, which is associated with the formation of foam cells. At the same time, different types of antioxidants have been evaluated to arrest the formation of foam cells, even if the results are still contradictory. In any case, a combination of antioxidants seems to be more efficient in the prevention of atherosclerosis.
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Affiliation(s)
- Giuseppe Lisco
- Interdisciplinary Department of Medicine-Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases. University of Bari "Aldo Moro", School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Italy
| | - Vito Angelo Giagulli
- Interdisciplinary Department of Medicine-Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases. University of Bari "Aldo Moro", School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Italy
| | - Giovanni De Pergola
- Unit of Geriatrics and Internal Medicine, National Institute of Gastroenterology "Saverio de Bellis", Research Hospital, Castellana Grotte, Bari, Italy
| | - Edoardo Guastamacchia
- Interdisciplinary Department of Medicine-Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases. University of Bari "Aldo Moro", School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Italy
| | - Emilio Jirillo
- Department of Basic Medical Science, Neuroscience and Sensory Organs, University of Bari Aldo Moro, Bari, Italy
| | - Vincenzo Triggiani
- Interdisciplinary Department of Medicine-Section of Internal Medicine, Geriatrics, Endocrinology and Rare Diseases. University of Bari "Aldo Moro", School of Medicine, Policlinico, Piazza Giulio Cesare 11, 70124 Bari, Italy
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Cai J, Zhang X, Chen P, Li Y, Liu S, Liu Q, Zhang H, Wu Z, Song K, Liu J, Shan B, Liu Y. The ER stress sensor inositol-requiring enzyme 1α in Kupffer cells promotes hepatic ischemia-reperfusion injury. J Biol Chem 2021; 298:101532. [PMID: 34953853 PMCID: PMC8760522 DOI: 10.1016/j.jbc.2021.101532] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 12/13/2021] [Indexed: 12/18/2022] Open
Abstract
Hepatic ischemia/reperfusion (I/R) injury is an inflammation-mediated process arising from ischemia/reperfusion-elicited stress in multiple cell types, causing liver damage during surgical procedures and often resulting in liver failure. Endoplasmic reticulum (ER) stress triggers the activation of the unfolded protein response (UPR) and is implicated in tissue injuries, including hepatic I/R injury. However, the cellular mechanism that links the UPR signaling to local inflammatory responses during hepatic I/R injury remains largely obscure. Here, we report that IRE1α, a critical ER-resident transmembrane signal transducer of the UPR, plays an important role in promoting Kupffer-cell-mediated liver inflammation and hepatic I/R injury. Utilizing a mouse model in which IRE1α is specifically ablated in myeloid cells, we found that abrogation of IRE1α markedly attenuated necrosis and cell death in the liver, accompanied by reduced neutrophil infiltration and liver inflammation following hepatic I/R injury. Mechanistic investigations in mice as well as in primary Kupffer cells revealed that loss of IRE1α in Kupffer cells not only blunted the activation of the NLRP3 inflammasome and IL-1β production, but also suppressed the expression of the inducible nitric oxide synthase (iNos) and proinflammatory cytokines. Moreover, pharmacological inhibition of IRE1α′s RNase activity was able to attenuate inflammasome activation and iNos expression in Kupffer cells, leading to alleviation of hepatic I/R injury. Collectively, these results demonstrate that Kupffer cell IRE1α mediates local inflammatory damage during hepatic I/R injury. Our findings suggest that IRE1α RNase activity may serve as a promising target for therapeutic treatment of ischemia/reperfusion-associated liver inflammation and dysfunction.
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Affiliation(s)
- Jie Cai
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China
| | - Xiaoge Zhang
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China
| | - Peng Chen
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China
| | - Yang Li
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China
| | - Songzi Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China
| | - Qian Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China
| | - Hanyong Zhang
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhuyin Wu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China
| | - Ke Song
- Department of Stomatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianmiao Liu
- Cellular Signaling Laboratory, Key Laboratory of Molecular Biophysics of Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Bo Shan
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.
| | - Yong Liu
- Hubei Key Laboratory of Cell Homeostasis, College of Life Sciences; the Institute for Advanced Studies; Frontier Science Center for Immunology and Metabolism; Wuhan University, Wuhan 430072, China.
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Hauck S, Zager P, Halfter N, Wandel E, Torregrossa M, Kakpenova A, Rother S, Ordieres M, Räthel S, Berg A, Möller S, Schnabelrauch M, Simon JC, Hintze V, Franz S. Collagen/hyaluronan based hydrogels releasing sulfated hyaluronan improve dermal wound healing in diabetic mice via reducing inflammatory macrophage activity. Bioact Mater 2021; 6:4342-4359. [PMID: 33997511 PMCID: PMC8105600 DOI: 10.1016/j.bioactmat.2021.04.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 04/14/2021] [Accepted: 04/15/2021] [Indexed: 12/13/2022] Open
Abstract
Sustained inflammation associated with dysregulated macrophage activation prevents tissue formation and healing of chronic wounds. Control of inflammation and immune cell functions thus represents a promising approach in the development of advanced therapeutic strategies. Here we describe immunomodulatory hyaluronan/collagen (HA-AC/coll)-based hydrogels containing high-sulfated hyaluronan (sHA) as immunoregulatory component for the modulation of inflammatory macrophage activities in disturbed wound healing. Solute sHA downregulates inflammatory activities of bone marrow-derived and tissue-resident macrophages in vitro. This further affects macrophage-mediated pro-inflammatory activation of skin cells as shown in skin ex-vivo cultures. In a mouse model of acute skin inflammation, intradermal injection of sHA downregulates the inflammatory processes in the skin. This is associated with the promotion of an anti-inflammatory gene signature in skin macrophages indicating a shift of their activation profile. For in vivo translation, we designed HA-AC/coll hydrogels allowing delivery of sHA into wounds over a period of at least one week. Their immunoregulatory capacity was analyzed in a translational experimental approach in skin wounds of diabetic db/db mice, an established model for disturbed wound healing. The sHA-releasing hydrogels improved defective tissue repair with reduced inflammation, augmented pro-regenerative macrophage activation, increased vascularization, and accelerated new tissue formation and wound closure.
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Affiliation(s)
- Sophia Hauck
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Paula Zager
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Norbert Halfter
- Institute of Materials Science, Max Bergmann Center for Biomaterials, Technische Universität Dresden, 01069, Dresden, Germany
| | - Elke Wandel
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Marta Torregrossa
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Ainur Kakpenova
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Sandra Rother
- Institute of Materials Science, Max Bergmann Center for Biomaterials, Technische Universität Dresden, 01069, Dresden, Germany
| | - Michelle Ordieres
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Susann Räthel
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Albrecht Berg
- Biomaterials Department, INNOVENT e.V. Jena, Germany
| | | | | | - Jan C. Simon
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
| | - Vera Hintze
- Institute of Materials Science, Max Bergmann Center for Biomaterials, Technische Universität Dresden, 01069, Dresden, Germany
| | - Sandra Franz
- Department of Dermatology, Venerology und Allergology, Leipzig University, 04103, Leipzig, Germany
- Corresponding author. University Leipzig, Department of Dermatology, Venerology and Allergology, Max Bürger Research Centre, Johannisallee 30, 04103, Leipzig, Germany.
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Huang SF, Zhao G, Peng XF, Ye WC. The Pathogenic Role of Long Non-coding RNA H19 in Atherosclerosis via the miR-146a-5p/ANGPTL4 Pathway. Front Cardiovasc Med 2021; 8:770163. [PMID: 34820432 PMCID: PMC8606739 DOI: 10.3389/fcvm.2021.770163] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 10/18/2021] [Indexed: 12/27/2022] Open
Abstract
The abnormally expressed long non-coding RNA (lncRNA) H19 has a crucial function in the development and progression of cardiovascular disease; however, its role in atherosclerosis is yet to be known. We aimed to examine the impacts of lncRNA H19 on atherogenesis as well as the involved mechanism. The outcomes from this research illustrated that the expression of lncRNA H19 was elevated in mouse blood and aorta with lipid-loaded macrophages and atherosclerosis. Adeno-associated virus (AAV)-mediated lncRNA H19 overexpression significantly increased the atherosclerotic plaque area in apoE−/− mice supplied with a Western diet. The upregulation of lncRNA H19 decreased the miR-146a-5p expression but increased the levels of ANGPTL4 in mouse blood and aorta and THP-1 cells. Furthermore, lncRNA H19 overexpression promoted lipid accumulation in oxidized low-density lipoprotein (ox-LDL)-induced THP-1 macrophages. However, the knockdown of lncRNA H19 served as a protection against atherosclerosis in apoE−/− mice and lowered the accumulation of lipids in ox-LDL-induced THP-1 macrophages. lncRNA H19 promoted the expression of ANGPTL4 via competitively binding to miR-146a-5p, thus promoting lipid accumulation in atherosclerosis. These findings altogether demonstrated that lncRNA H19 facilitated the accumulation of lipid in macrophages and aggravated the progression of atherosclerosis through the miR-146a-5p/ANGPTL4 pathway. Targeting lncRNA H19 might be an auspicious therapeutic approach for preventing and treating atherosclerotic disease.
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Affiliation(s)
- Shi-Feng Huang
- Qingyuan People's Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China
| | - Guifang Zhao
- Qingyuan People's Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China
| | - Xiao-Fei Peng
- Department of General Surgery, Qingyuan People's Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China
| | - Wen-Chu Ye
- Qingyuan People's Hospital, The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan, China
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45
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Pharmacological targeting of endoplasmic reticulum stress in disease. Nat Rev Drug Discov 2021; 21:115-140. [PMID: 34702991 DOI: 10.1038/s41573-021-00320-3] [Citation(s) in RCA: 183] [Impact Index Per Article: 61.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2021] [Indexed: 02/08/2023]
Abstract
The accumulation of misfolded proteins in the endoplasmic reticulum (ER) leads to ER stress, resulting in activation of the unfolded protein response (UPR) that aims to restore protein homeostasis. However, the UPR also plays an important pathological role in many diseases, including metabolic disorders, cancer and neurological disorders. Over the last decade, significant effort has been invested in targeting signalling proteins involved in the UPR and an array of drug-like molecules is now available. However, these molecules have limitations, the understanding of which is crucial for their development into therapies. Here, we critically review the existing ER stress and UPR-directed drug-like molecules, highlighting both their value and their limitations.
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46
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Huang J, Fan P, Liu M, Weng C, Fan G, Zhang T, Duan X, Wu Y, Tang L, Yang G, Liu Y. Famotidine promotes inflammation by triggering cell pyroptosis in gastric cancer cells. BMC Pharmacol Toxicol 2021; 22:62. [PMID: 34686215 PMCID: PMC8539739 DOI: 10.1186/s40360-021-00533-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Accepted: 10/15/2021] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND Cell pyroptosis has been characterized by cell swelling and pro-inflammatory factors release to aggravate inflammatory reaction., such as interlukin-1 beta (IL-1β) and interlukin18 (IL-18). However, the function of famotidine, an antagonist of histamine H2-receptor antagonists, in cell pyroptosis remained unknown. METHODS Real-time quantitative PCR (qPCR), western blotting (WB), LDH release assay and enzyme linked immunosorbent assay (Elisa) combined with inhibitor were performed to analyze the effect of famotidine on cell pyroptosis-related gene expression. RESULTS In this study, we found that famotidine (300 μm) treatment led to a phenomenon of cell pyroptosis as confirmed by LDH assay. Further results showed that famotidine triggered cell pyroptosis in gastric cancer cells by activation of NLPR3 inflammasomes including ASC, Caspase-1 and NLRP, leading to enhanced IL-18, not IL-1β, mature and secretion. What's more, the results also showed GSDME, not GSDMD, was increased in response to famotidine stimulation in BGC823 and AGS cells. Mechanically, phosphorylation of ERK1/2 was drastically enhanced in present with famotidine treatment, while inhibition of ERK1/2 activity by U0126 could reverse the promotion of famotidine in IL-18 secretion. CONCLUSION These findings revealed a novel role of famotidine in cell pyroptosis in patients with gastric cancer, a comprehensive consideration is needed in treatment of gastric cancer.
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Affiliation(s)
- Jin Huang
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Pingsheng Fan
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Miao Liu
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Chengtao Weng
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Gaofei Fan
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Tengyue Zhang
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Xiaohong Duan
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Yang Wu
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Lili Tang
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Guohong Yang
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China
| | - Yabei Liu
- Department of Medical Oncology, the First affiliated Hospital of University of Science and Technology of China(West), Heifei, Anhui, China.
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47
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Liang JJ, Fraser IDC, Bryant CE. Lipid regulation of NLRP3 inflammasome activity through organelle stress. Trends Immunol 2021; 42:807-823. [PMID: 34334306 DOI: 10.1016/j.it.2021.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/10/2021] [Accepted: 07/11/2021] [Indexed: 12/14/2022]
Abstract
Inflammation driven by the NLRP3 inflammasome in macrophages is an important contributor to chronic metabolic diseases that affect growing numbers of individuals. Many of these diseases involve the pathologic accumulation of endogenous lipids or their oxidation products, which can activate NLRP3. Other endogenous lipids, however, can inhibit the activation of NLRP3. The intracellular mechanisms by which these lipids modulate NLRP3 activity are now being identified. This review discusses emerging evidence suggesting that organelle stress, particularly involving mitochondria, lysosomes, and the endoplasmic reticulum, may be key in lipid-induced modification of NLRP3 inflammasome activity.
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Affiliation(s)
- Jonathan J Liang
- Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Disease (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA; Department of Medicine, University of Cambridge, Cambridge, UK
| | - Iain D C Fraser
- Signaling Systems Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Disease (NIAID), National Institutes of Health (NIH), Bethesda, MD, USA.
| | - Clare E Bryant
- Department of Medicine, University of Cambridge, Cambridge, UK.
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48
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Xie J, Fan L, Xiong L, Chen P, Wang H, Chen H, Zhao J, Xu Z, Geng L, Xu W, Gong S. Rabeprazole inhibits inflammatory reaction by inhibition of cell pyroptosis in gastric epithelial cells. BMC Pharmacol Toxicol 2021; 22:44. [PMID: 34266494 PMCID: PMC8283986 DOI: 10.1186/s40360-021-00509-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 07/07/2021] [Indexed: 01/04/2023] Open
Abstract
Background Helicobacter pylori (H. pylori) is a common pathogen in development of peptic ulcers with pyroptosis. Rabeprazole, a critical component of standard triple therapy, has been widely used as the first-line regimen for H. pylori infectious treatment. The aim of this study to explore the function of Rabeprazole on cell pyroptosis in vitro. Methods The clinical sample from patients diagnosed with or without H. pylori-infection were collected to analyze by Immunohistochemistry (IHC). Real-time quantitative PCR (qPCR), western blot (WB) and enzyme linked immunosorbent assay (Elisa) were performed to analyze the effect of Rabeprazole on cell pyroptosis, including LDH, IL-1β and IL-18. Results In this study, we showed that Rabeprazole regulated a phenomenon of cell pyroptosis as confirmed by lactate dehydrogenase (LDH) assay. Further results showed that Rabeprazole inhibited cell pyroptosis in gastric epithelial cells by alleviating GSDMD-executed pyroptosis, leading to decrease IL-1β and IL-18 mature and secretion, which is attributed to NLRP3 inflammasome activation inhibition. Further analysis showed that ASC, NLRP3 and Caspase-1, was significantly repressed in response to Rabeprazole stimulation, resulting in decreasing cleaved-caspase-1 expression. Most important, NLRP3 and GSDMD is significantly increased in gastric tissue of patients with H. pylori infection. Conclusion These findings revealed a critical role of Rabeprazole in cell pyroptosis in patients with H. pylori infection, suggesting that targeting cell pyroptosis is an alternative strategy in improving H. pylori treatment.
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Affiliation(s)
- Jing Xie
- The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China.,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Long Fan
- Department of Pharmacy. Zhuhai Maternal and Child Health Hospital, Zhuhai, China
| | - Liya Xiong
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Peiyu Chen
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Hongli Wang
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Huan Chen
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Junhong Zhao
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Zhaohui Xu
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Lanlan Geng
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China
| | - Wanfu Xu
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China. .,Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.
| | - Sitang Gong
- The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou, China. .,Department of Gastroenterology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, 510623, China. .,Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China.
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49
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Scott Jr L, Fender AC, Saljic A, Li L, Chen X, Wang X, Linz D, Lang J, Hohl M, Twomey D, Pham TT, Diaz-Lankenau R, Chelu MG, Kamler M, Entman ML, Taffet GE, Sanders P, Dobrev D, Li N. NLRP3 inflammasome is a key driver of obesity-induced atrial arrhythmias. Cardiovasc Res 2021; 117:1746-1759. [PMID: 33523143 PMCID: PMC8208743 DOI: 10.1093/cvr/cvab024] [Citation(s) in RCA: 81] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/17/2020] [Accepted: 01/18/2021] [Indexed: 12/27/2022] Open
Abstract
AIMS Obesity, an established risk factor of atrial fibrillation (AF), is frequently associated with enhanced inflammatory response. However, whether inflammatory signaling is causally linked to AF pathogenesis in obesity remains elusive. We recently demonstrated that the constitutive activation of the 'NACHT, LRR, and PYD Domains-containing Protein 3' (NLRP3) inflammasome promotes AF susceptibility. In this study, we hypothesized that the NLRP3 inflammasome is a key driver of obesity-induced AF. METHODS AND RESULTS Western blotting was performed to determine the level of NLRP3 inflammasome activation in atrial tissues of obese patients, sheep, and diet-induced obese (DIO) mice. The increased body weight in patients, sheep, and mice was associated with enhanced NLRP3-inflammasome activation. To determine whether NLRP3 contributes to the obesity-induced atrial arrhythmogenesis, wild-type (WT) and NLRP3 homozygous knockout (NLRP3-/-) mice were subjected to high-fat-diet (HFD) or normal chow (NC) for 10 weeks. Relative to NC-fed WT mice, HFD-fed WT mice were more susceptible to pacing-induced AF with longer AF duration. In contrast, HFD-fed NLRP3-/- mice were resistant to pacing-induced AF. Optical mapping in DIO mice revealed an arrhythmogenic substrate characterized by abbreviated refractoriness and action potential duration (APD), two key determinants of reentry-promoting electrical remodeling. Upregulation of ultra-rapid delayed-rectifier K+-channel (Kv1.5) contributed to the shortening of atrial refractoriness. Increased profibrotic signaling and fibrosis along with abnormal Ca2+ release from sarcoplasmic reticulum (SR) accompanied atrial arrhythmogenesis in DIO mice. Conversely, genetic ablation of Nlrp3 (NLRP3-/-) in HFD-fed mice prevented the increases in Kv1.5 and the evolution of electrical remodeling, the upregulation of profibrotic genes, and abnormal SR Ca2+ release in DIO mice. CONCLUSION These results demonstrate that the atrial NLRP3 inflammasome is a key driver of obesity-induced atrial arrhythmogenesis and establishes a mechanistic link between obesity-induced AF and NLRP3-inflammasome activation.
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Affiliation(s)
- Larry Scott Jr
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA
| | - Anke C Fender
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - Arnela Saljic
- Laboratory of Cardiac Physiology, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Luge Li
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Xiaohui Chen
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Xiaolei Wang
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Dominik Linz
- Laboratory of Cardiac Physiology, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Cardiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Centre, Maastricht, The Netherlands
- Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, Royal Adelaide Hospital, University of Adelaide, Adelaide, Australia
| | - Jilu Lang
- Department of Cardiac Center, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China
| | - Mathias Hohl
- Department of Cardiology/Angiology, University-Clinic of Saarland, Internal Medicine III, Homburg/Saar, Germany
| | | | - Thuy T Pham
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Rodrigo Diaz-Lankenau
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Mihail G Chelu
- Division of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Markus Kamler
- Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - Mark L Entman
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - George E Taffet
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
| | - Prashanthan Sanders
- Centre for Heart Rhythm Disorders, South Australian Health and Medical Research Institute, Royal Adelaide Hospital, University of Adelaide, Adelaide, Australia
| | - Dobromir Dobrev
- Institute of Pharmacology, West German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - Na Li
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA
- Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, TX, USA
- Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
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50
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Folick A, Koliwad SK, Valdearcos M. Microglial Lipid Biology in the Hypothalamic Regulation of Metabolic Homeostasis. Front Endocrinol (Lausanne) 2021; 12:668396. [PMID: 34122343 PMCID: PMC8191416 DOI: 10.3389/fendo.2021.668396] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 05/05/2021] [Indexed: 12/18/2022] Open
Abstract
In mammals, myeloid cells help maintain the homeostasis of peripheral metabolic tissues, and their immunologic dysregulation contributes to the progression of obesity and associated metabolic disease. There is accumulating evidence that innate immune cells also serve as functional regulators within the mediobasal hypothalamus (MBH), a critical brain region controlling both energy and glucose homeostasis. Specifically, microglia, the resident parenchymal myeloid cells of the CNS, play important roles in brain physiology and pathology. Recent studies have revealed an expanding array of microglial functions beyond their established roles as immune sentinels, including roles in brain development, circuit refinement, and synaptic organization. We showed that microglia modulate MBH function by transmitting information resulting from excess nutrient consumption. For instance, microglia can sense the excessive consumption of saturated fats and instruct neurons within the MBH accordingly, leading to responsive alterations in energy balance. Interestingly, the recent emergence of high-resolution single-cell techniques has enabled specific microglial populations and phenotypes to be profiled in unprecedented detail. Such techniques have highlighted specific subsets of microglia notable for their capacity to regulate the expression of lipid metabolic genes, including lipoprotein lipase (LPL), apolipoprotein E (APOE) and Triggering Receptor Expressed on Myeloid Cells 2 (TREM2). The discovery of this transcriptional signature highlights microglial lipid metabolism as a determinant of brain health and disease pathogenesis, with intriguing implications for the treatment of brain disorders and potentially metabolic disease. Here we review our current understanding of how changes in microglial lipid metabolism could influence the hypothalamic control of systemic metabolism.
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Affiliation(s)
- Andrew Folick
- Diabetes Center, University of California, San Francisco, San Francisco, CA, United States
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Suneil K. Koliwad
- Diabetes Center, University of California, San Francisco, San Francisco, CA, United States
- Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Martin Valdearcos
- Diabetes Center, University of California, San Francisco, San Francisco, CA, United States
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