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  1. Article ; Online: Myeloid cell MHC I expression drives CD8

    Adams, Victoria R / Collins, Leonard B / Williams, Taufika Islam / Holmes, Jennifer / Hess, Paul / Atkins, Hannah M / Scheidemantle, Grace / Liu, Xiaojing / Lodge, Mareca / Johnson, Aaron J / Kennedy, Arion

    Frontiers in immunology

    2024  Volume 14, Page(s) 1302006

    Abstract: Background & aims: Activated CD8: Methods: We used H2Kb and H2Db deficient (MHC I KO: Results: In NASH, MHC class I isoform H2Kb was upregulated in myeloid cells. MHC I KO demonstrated protective effects against NASH-induced inflammation and ... ...

    Abstract Background & aims: Activated CD8
    Methods: We used H2Kb and H2Db deficient (MHC I KO
    Results: In NASH, MHC class I isoform H2Kb was upregulated in myeloid cells. MHC I KO demonstrated protective effects against NASH-induced inflammation and fibrosis. Kb mice exhibited increased fibrosis in the absence of H2Db while LysM Kb KO mice showed protection against fibrosis but not inflammation. H2Kb restricted peptides identified a unique NASH peptide Ncf2 capable of CD8
    Conclusion: These results suggest that activated hepatic CD8
    MeSH term(s) Animals ; Mice ; Non-alcoholic Fatty Liver Disease/pathology ; CD8-Positive T-Lymphocytes ; Inflammation ; Myeloid Cells/metabolism ; Mice, Transgenic ; Fibrosis ; Cytokines/metabolism
    Chemical Substances Cytokines
    Language English
    Publishing date 2024-01-11
    Publishing country Switzerland
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2606827-8
    ISSN 1664-3224 ; 1664-3224
    ISSN (online) 1664-3224
    ISSN 1664-3224
    DOI 10.3389/fimmu.2023.1302006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Data-dependent and -independent acquisition lipidomics analysis reveals the tissue-dependent effect of metformin on lipid metabolism.

    Scheidemantle, Grace / Duan, Likun / Lodge, Mareca / Cummings, Magdalina J / Hilovsky, Dalton / Pham, Eva / Wang, Xiaoqiu / Kennedy, Arion / Liu, Xiaojing

    Research square

    2023  

    Abstract: Introduction: Despite the well-recognized health benefits, the mechanisms and site of action of metformin remains elusive. Metformin-induced global lipidomic changes in plasma of animal models and human subjects have been reported. However, there is a ... ...

    Abstract Introduction: Despite the well-recognized health benefits, the mechanisms and site of action of metformin remains elusive. Metformin-induced global lipidomic changes in plasma of animal models and human subjects have been reported. However, there is a lack of systemic evaluation of metformin-induced lipidomic changes in different tissues. Metformin uptake requires active transporters such as organic cation transporters (OCTs), and hence, it is anticipated that metformin actions are tissue-dependent. In this study, we aim to characterize metformin effects in non-diabetic male mice with a special focus on lipidomics analysis. The findings from this study will help us to better understand the cell-autonomous (direct actions in target cells) or non-cell-autonomous (indirect actions in target cells) mechanisms of metformin and provide insights into the development of more potent yet safe drugs targeting a particular organ instead of systemic metabolism for metabolic regulations without major side effects.
    Objectives: To characterize metformin-induced lipidomic alterations in different tissues of non-diabetic male mice and further identify lipids affected by metformin through cell-autonomous or systemic mechanisms based on the correlation between lipid alterations in tissues and the corresponding in-tissue metformin concentrations.
    Methods: Lipids were extracted from tissues and plasma of male mice treated with or without metformin in drinking water for 12 days and analyzed using MS/MS scan workflow (hybrid mode) on LC-Orbitrap Exploris 480 mass spectrometer using biologically relevant lipids-containing inclusion list for data-independent acquisition (DIA), named as BRI-DIA workflow followed by data-dependent acquisition (DDA), to maximum the coverage of lipids and minimize the negative effect of stochasticity of precursor selection on experimental consistency and reproducibility.
    Results: Lipidomics analysis of 6 mouse tissues and plasma using MS/MS combining BRI-DIA and DDA allowed a systemic evaluation of lipidomic changes induced by metformin in different tissues. We observed that 1) the degrees of lipidomic changes induced by metformin treatment overly correlated with tissue concentrations of metformin; 2) the impact on lysophosphorylcholine and cardiolipins was positively correlated with tissue concentrations of metformin, while neutral lipids such as triglycerides did not correlate with the corresponding tissue metformin concentrations.
    Conclusion: The data collected in this study from non-diabetic mice with 12-day metformin treatment suggest that the overall metabolic effect of metformin is positively correlated with tissue concentrations and the effect on individual lipid subclass is via both cell-autonomous mechanisms (cardiolipins and lysoPC) and non-cell-autonomous mechanisms (triglycerides).
    Language English
    Publishing date 2023-01-10
    Publishing country United States
    Document type Preprint
    DOI 10.21203/rs.3.rs-2444456/v1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Prioritize biologically relevant ions for data-independent acquisition (BRI-DIA) in LC-MS/MS-based lipidomics analysis.

    Duan, Likun / Scheidemantle, Grace / Lodge, Mareca / Cummings, Magdalina J / Pham, Eva / Wang, Xiaoqiu / Kennedy, Arion / Liu, Xiaojing

    Metabolomics : Official journal of the Metabolomic Society

    2022  Volume 18, Issue 8, Page(s) 55

    Abstract: Introduction: Data-dependent acquisition (DDA) is the most commonly used MS/MS scan method for lipidomics analysis on orbitrap-based instrument. However, MS instrument associated software decide the top N precursors for fragmentation, resulting in ... ...

    Abstract Introduction: Data-dependent acquisition (DDA) is the most commonly used MS/MS scan method for lipidomics analysis on orbitrap-based instrument. However, MS instrument associated software decide the top N precursors for fragmentation, resulting in stochasticity of precursor selection and compromised consistency and reproducibility. We introduce a novel workflow using biologically relevant lipids to construct inclusion list for data-independent acquisition (DIA), named as BRI-DIA workflow.
    Objectives: To ensure consistent coverage of biologically relevant lipids in LC-MS/MS-based lipidomics analysis.
    Methods: Biologically relevant ion list was constructed based on LIPID MAPS and lipidome atlas in MS-DIAL 4. Lipids were extracted from mouse tissues and used to assess different MS/MS scan workflow (DDA, BRI-DIA, and hybrid mode) on LC-Orbitrap Exploris 480 mass spectrometer.
    Results: DDA resulted in more MS/MS events, but the total number of unique lipids identified by three methods (DDA, BRI-DIA, and hybrid MS/MS scan mode) is comparable (580 unique lipids across 44 lipid subclasses in mouse liver). Major cardiolipin molecular species were identified by data generated using BRI-DIA and hybrid methods and allowed calculation of cardiolipin compositions, while identification of the most abundant cardiolipin CL72:8 was missing in data generated using DDA method, leading to wrong calculation of cardiolipin composition.
    Conclusion: The method of using inclusion list comprised of biologically relevant lipids in DIA MS/MS scan is as efficient as traditional DDA method in profiling lipids, but offers better consistency of lipid identification, compared to DDA method. This study was performed using Orbitrap Exploris 480, and we will further evaluate this workflow on other platforms, and if verified by future work, this biologically relevant ion fragmentation workflow could be routinely used in many studies to improve MS/MS identification capacities.
    MeSH term(s) Animals ; Cardiolipins ; Chromatography, Liquid/methods ; Ions ; Lipidomics ; Metabolomics ; Mice ; Reproducibility of Results ; Tandem Mass Spectrometry/methods
    Chemical Substances Cardiolipins ; Ions
    Language English
    Publishing date 2022-07-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, N.I.H., Extramural
    ZDB-ID 2250617-2
    ISSN 1573-3890 ; 1573-3882
    ISSN (online) 1573-3890
    ISSN 1573-3882
    DOI 10.1007/s11306-022-01913-8
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Obesity-induced reduction of adipose eosinophils is reversed with low-calorie dietary intervention.

    Bolus, William Reid / Kennedy, Arion J / Hasty, Alyssa H

    Physiological reports

    2018  Volume 6, Issue 22, Page(s) e13919

    Abstract: While many studies have characterized the inflammatory disposition of adipose tissue (AT) during obesity, far fewer have dissected how such inflammation resolves during the process of physiological weight loss. In addition, new immune cells, such as the ... ...

    Abstract While many studies have characterized the inflammatory disposition of adipose tissue (AT) during obesity, far fewer have dissected how such inflammation resolves during the process of physiological weight loss. In addition, new immune cells, such as the eosinophil, have been discovered as part of the AT immune cell repertoire. We have therefore characterized how AT eosinophils, associated eosinophilic inflammation, and remodeling processes, fluctuate during a dietary intervention in obese mice. Similar to previous reports, we found that obesity induced by high-fat diet feeding reduced the AT eosinophil content. However, upon switching obese mice to a low fat diet, AT eosinophils were restored to lean levels as mice reached the body weight of controls. The rise in AT eosinophils during dietary weight loss was accompanied by reduced macrophage content and inflammatory expression, upregulated tissue remodeling factors, and a more uniformly distributed AT vascular network. Additionally, we show that eosinophils of another metabolically relevant tissue, the liver, did not oscillate with either dietary weight gain or weight loss. This study shows that eosinophil content is differentially regulated among tissues during the onset and resolution of obesity. Furthermore, AT eosinophils correlated with AT remodeling processes during weight loss and thus may play a role in reestablishing AT homeostasis.
    MeSH term(s) Adipose Tissue/pathology ; Animals ; Caloric Restriction ; Cells, Cultured ; Eosinophils/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Obesity/diet therapy ; Obesity/pathology ; Weight Loss
    Language English
    Publishing date 2018-08-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2724325-4
    ISSN 2051-817X ; 2051-817X
    ISSN (online) 2051-817X
    ISSN 2051-817X
    DOI 10.14814/phy2.13919
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Role of lipids in the metabolism and activation of immune cells.

    Hubler, Merla J / Kennedy, Arion J

    The Journal of nutritional biochemistry

    2015  Volume 34, Page(s) 1–7

    Abstract: Immune cell plasticity has extensive implications in the pathogenesis and resolution of metabolic disorders, cancers, autoimmune diseases and chronic inflammatory disorders. Over the past decade, nutritional status has been discovered to influence the ... ...

    Abstract Immune cell plasticity has extensive implications in the pathogenesis and resolution of metabolic disorders, cancers, autoimmune diseases and chronic inflammatory disorders. Over the past decade, nutritional status has been discovered to influence the immune response. In metabolic disorders such as obesity, immune cells interact with various classes of lipids, which are capable of controlling the plasticity of macrophages and T lymphocytes. The purpose of this review is to discuss lipids and their impact on innate and adaptive immune responses, focusing on two areas: (1) the impact of altering lipid metabolism on immune cell activation, differentiation and function and (2) the mechanism by which lipids such as cholesterol and fatty acids regulate immune cell plasticity.
    MeSH term(s) Adaptive Immunity ; Cardiovascular Diseases/etiology ; Cardiovascular Diseases/immunology ; Cardiovascular Diseases/metabolism ; Cardiovascular Diseases/pathology ; Cell Plasticity ; Dietary Fats/adverse effects ; Dietary Fats/metabolism ; Humans ; Immunity, Cellular ; Immunity, Innate ; Lipid Metabolism ; Macrophages/cytology ; Macrophages/immunology ; Macrophages/metabolism ; Macrophages/pathology ; Models, Immunological ; Non-alcoholic Fatty Liver Disease/etiology ; Non-alcoholic Fatty Liver Disease/immunology ; Non-alcoholic Fatty Liver Disease/metabolism ; Non-alcoholic Fatty Liver Disease/pathology ; Nutritional Status ; Obesity/etiology ; Obesity/immunology ; Obesity/metabolism ; Obesity/pathology ; T-Lymphocytes/cytology ; T-Lymphocytes/immunology ; T-Lymphocytes/metabolism ; T-Lymphocytes/pathology
    Chemical Substances Dietary Fats
    Language English
    Publishing date 2015-11-24
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1014929-6
    ISSN 1873-4847 ; 0955-2863
    ISSN (online) 1873-4847
    ISSN 0955-2863
    DOI 10.1016/j.jnutbio.2015.11.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: MFe

    Hubler, Merla J / Erikson, Keith M / Kennedy, Arion J / Hasty, Alyssa H

    American journal of physiology. Cell physiology

    2018  Volume 315, Issue 3, Page(s) C319–C329

    Abstract: Resident adipose tissue macrophages (ATMs) play multiple roles to maintain tissue homeostasis, such as removing excess free fatty acids and regulation of the extracellular matrix. The phagocytic nature and oxidative resiliency of macrophages not only ... ...

    Abstract Resident adipose tissue macrophages (ATMs) play multiple roles to maintain tissue homeostasis, such as removing excess free fatty acids and regulation of the extracellular matrix. The phagocytic nature and oxidative resiliency of macrophages not only allows them to function as innate immune cells but also to respond to specific tissue needs, such as iron homeostasis. MFe
    MeSH term(s) Adipocytes/metabolism ; Adipocytes/physiology ; Adipose Tissue/metabolism ; Adipose Tissue/physiology ; Animals ; Cell Line ; Dietary Supplements ; Inflammation/metabolism ; Inflammation/physiopathology ; Iron Overload/metabolism ; Iron Overload/physiopathology ; Iron, Dietary/metabolism ; Macrophages/metabolism ; Macrophages/physiology ; Male ; Mice ; Mice, Inbred C57BL ; Monocytes/metabolism ; Monocytes/physiology
    Chemical Substances Iron, Dietary
    Language English
    Publishing date 2018-05-16
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 392098-7
    ISSN 1522-1563 ; 0363-6143
    ISSN (online) 1522-1563
    ISSN 0363-6143
    DOI 10.1152/ajpcell.00103.2018
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Macrophage-Targeted Therapeutics for Metabolic Disease.

    Peterson, Kristin R / Cottam, Matthew A / Kennedy, Arion J / Hasty, Alyssa H

    Trends in pharmacological sciences

    2018  Volume 39, Issue 6, Page(s) 536–546

    Abstract: Macrophages are cells of the innate immune system that are resident in all tissues, including metabolic organs such as the liver and adipose tissue (AT). Because of their phenotypic flexibility, they play beneficial roles in tissue homeostasis, but they ... ...

    Abstract Macrophages are cells of the innate immune system that are resident in all tissues, including metabolic organs such as the liver and adipose tissue (AT). Because of their phenotypic flexibility, they play beneficial roles in tissue homeostasis, but they also contribute to the progression of metabolic disease. Thus, they are ideal therapeutic targets for diseases such as insulin resistance (IR), nonalcoholic fatty liver disease (NAFLD), and atherosclerosis. Recently, discoveries in the area of drug delivery have facilitated phenotype-specific targeting of macrophages. In this review we discuss advances in potential therapeutics for metabolic diseases via macrophage-specific delivery. We highlight micro- and nanoparticles, liposomes, and oligopeptide complexes, and how they can be used to alter macrophage phenotype for a more metabolically favorable tissue environment.
    MeSH term(s) Drug Delivery Systems/methods ; Gene Expression/drug effects ; Humans ; Macrophages/drug effects ; Macrophages/immunology ; Metabolic Diseases/drug therapy ; Metabolic Diseases/immunology ; Molecular Targeted Therapy ; Pharmaceutical Preparations/administration & dosage
    Chemical Substances Pharmaceutical Preparations
    Language English
    Publishing date 2018-04-05
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 282846-7
    ISSN 1873-3735 ; 0165-6147
    ISSN (online) 1873-3735
    ISSN 0165-6147
    DOI 10.1016/j.tips.2018.03.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Role of lipids in the metabolism and activation of immune cells

    Hubler, Merla J / Arion J. Kennedy

    Journal of nutritional biochemistry. 2016 Aug., v. 34

    2016  

    Abstract: Immune cell plasticity has extensive implications in the pathogenesis and resolution of metabolic disorders, cancers, autoimmune diseases and chronic inflammatory disorders. Over the past decade, nutritional status has been discovered to influence the ... ...

    Abstract Immune cell plasticity has extensive implications in the pathogenesis and resolution of metabolic disorders, cancers, autoimmune diseases and chronic inflammatory disorders. Over the past decade, nutritional status has been discovered to influence the immune response. In metabolic disorders such as obesity, immune cells interact with various classes of lipids, which are capable of controlling the plasticity of macrophages and T lymphocytes. The purpose of this review is to discuss lipids and their impact on innate and adaptive immune responses, focusing on two areas: (1) the impact of altering lipid metabolism on immune cell activation, differentiation and function and (2) the mechanism by which lipids such as cholesterol and fatty acids regulate immune cell plasticity.
    Keywords adaptive immunity ; autoimmune diseases ; cholesterol ; chronic diseases ; fatty acids ; immune response ; lipid metabolism ; macrophages ; metabolic diseases ; neoplasms ; nutritional status ; obesity ; pathogenesis ; T-lymphocytes
    Language English
    Dates of publication 2016-08
    Size p. 1-7.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 1014929-6
    ISSN 1873-4847 ; 0955-2863
    ISSN (online) 1873-4847
    ISSN 0955-2863
    DOI 10.1016/j.jnutbio.2015.11.002
    Database NAL-Catalogue (AGRICOLA)

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  9. Article ; Online: CD8

    Breuer, Denitra A / Pacheco, Maria Cristina / Washington, M Kay / Montgomery, Stephanie A / Hasty, Alyssa H / Kennedy, Arion J

    American journal of physiology. Gastrointestinal and liver physiology

    2019  Volume 318, Issue 2, Page(s) G211–G224

    Abstract: Nonalcoholic steatohepatitis (NASH) has increased in Western countries due to the prevalence of obesity. Current interests are aimed at identifying the type and function of immune cells that infiltrate the liver and key factors responsible for mediating ... ...

    Abstract Nonalcoholic steatohepatitis (NASH) has increased in Western countries due to the prevalence of obesity. Current interests are aimed at identifying the type and function of immune cells that infiltrate the liver and key factors responsible for mediating their recruitment and activation in NASH. We investigated the function and phenotype of CD8
    MeSH term(s) Animals ; CD8-Positive T-Lymphocytes/pathology ; Hepatic Stellate Cells/drug effects ; Hepatitis/pathology ; Humans ; Hyperlipidemias/pathology ; Interleukin-10/biosynthesis ; Liver/pathology ; Male ; Mice ; Mice, Inbred C57BL ; Mice, Obese ; Non-alcoholic Fatty Liver Disease/complications ; Non-alcoholic Fatty Liver Disease/pathology ; Obesity/etiology ; Obesity/pathology ; Receptors, LDL/genetics ; Receptors, LDL/metabolism
    Chemical Substances IL10 protein, human ; IL10 protein, mouse ; Receptors, LDL ; Interleukin-10 (130068-27-8)
    Language English
    Publishing date 2019-11-11
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 603840-2
    ISSN 1522-1547 ; 0193-1857
    ISSN (online) 1522-1547
    ISSN 0193-1857
    DOI 10.1152/ajpgi.00040.2019
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Vitamin E does not prevent Western diet-induced NASH progression and increases metabolic flux dysregulation in mice.

    Hasenour, Clinton M / Kennedy, Arion J / Bednarski, Tomasz / Trenary, Irina A / Eudy, Brandon J / da Silva, Robin P / Boyd, Kelli L / Young, Jamey D

    Journal of lipid research

    2020  Volume 61, Issue 5, Page(s) 707–721

    Abstract: Fatty liver involves ectopic lipid accumulation and dysregulated hepatic oxidative metabolism, which can progress to a state of elevated inflammation and fibrosis referred to as nonalcoholic steatohepatitis (NASH). The factors that control progression ... ...

    Abstract Fatty liver involves ectopic lipid accumulation and dysregulated hepatic oxidative metabolism, which can progress to a state of elevated inflammation and fibrosis referred to as nonalcoholic steatohepatitis (NASH). The factors that control progression from simple steatosis to NASH are not fully known. Here, we tested the hypothesis that dietary vitamin E (VitE) supplementation would prevent NASH progression and associated metabolic alterations induced by a Western diet (WD). Hyperphagic melanocortin-4 receptor-deficient (MC4R
    MeSH term(s) Animals ; Antioxidants/chemistry ; Antioxidants/pharmacology ; Diet, Western/adverse effects ; Drug Interactions ; Lipid Metabolism/drug effects ; Liver/drug effects ; Liver/metabolism ; Male ; Metabolic Flux Analysis ; Mice ; Non-alcoholic Fatty Liver Disease/chemically induced ; Non-alcoholic Fatty Liver Disease/metabolism ; Non-alcoholic Fatty Liver Disease/prevention & control ; Solubility ; Vitamin E/pharmacology
    Chemical Substances Antioxidants ; Vitamin E (1406-18-4)
    Language English
    Publishing date 2020-02-21
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 80154-9
    ISSN 1539-7262 ; 0022-2275
    ISSN (online) 1539-7262
    ISSN 0022-2275
    DOI 10.1194/jlr.RA119000183
    Database MEDical Literature Analysis and Retrieval System OnLINE

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