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Nakashima H, Kearney BM, Kato A, Miyazaki H, Ito S, Nakashima M, Kinoshita M. Novel phenotypical and functional sub-classification of liver macrophages highlights changes in population dynamics in experimental mouse models. Cytometry A 2023; 103:902-914. [PMID: 37606087 DOI: 10.1002/cyto.a.24783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/11/2023] [Accepted: 07/28/2023] [Indexed: 08/23/2023]
Abstract
Liver macrophages are critical components of systemic immune system defense mechanisms. F4/80high Kupffer cells (KCs) are the predominant liver-resident macrophages and the first immune cells to contact pathogens entering the liver. F4/80low monocyte-derived macrophages (MoMφs) are essential macrophages that modulate liver immune functions. Here we report a novel method of identifying subpopulations of these two populations using traditional flow cytometry and examine each subpopulation for its putative roles in the pathogenesis of an experimental non-alcoholic steatohepatitis model. Using male C57BL/6 mice, we isolated and analyzed liver non-parenchymal cells by flow cytometry. We identified F4/80high and F4/80low macrophage populations and characterized subpopulations using uniform manifold approximation and projection. We identified three subpopulations in F4/80high macrophages: CD163(+) KCs, CD163(-) KCs, and liver capsular macrophages. CD163(+) KCs had higher phagocytic and bactericidal activities and more complex cellular structures than CD163(-) KCs. We also identified four subpopulations of F4/80low MoMφs based on Ly6C and MHC class II expression: infiltrating monocytes, pro-inflammatory MoMφs, Ly6C(-) monocytes, and conventional dendritic cells. CCR2 knock-out mice expressed lower levels of these monocyte-derived cells, and the count varied by subpopulation. In high-fat- and cholesterol-diet-fed mice, only one subpopulation, pro-inflammatory MoMφs, significantly increased in count. This indicates that changes to this subpopulation is the first step in the progression to non-alcoholic steatohepatitis. The community can use our novel subpopulation and gating strategy to better understand complex immunological mechanisms in various liver disorders through detailed analysis of these subpopulations.
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Affiliation(s)
- Hiroyuki Nakashima
- Department of Immunology and Microbiology, National Defense Medical College, Saitama, Japan
| | - Bradley M Kearney
- Department of Immunology and Microbiology, National Defense Medical College, Saitama, Japan
| | - Azusa Kato
- Department of Immunology and Microbiology, National Defense Medical College, Saitama, Japan
| | - Hiromi Miyazaki
- Division of Biomedical Engineering, National Defense Medical College Research Institute, Saitama, Japan
| | - Seigo Ito
- Department of Internal Medicine, Self-Defense Force Iruma Hospital, Saitama, Japan
| | - Masahiro Nakashima
- Department of Immunology and Microbiology, National Defense Medical College, Saitama, Japan
| | - Manabu Kinoshita
- Department of Immunology and Microbiology, National Defense Medical College, Saitama, Japan
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2
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Manna K, Khan ZS, Saha M, Mishra S, Gaikwad N, Bhakta JN, Banerjee K, Das Saha K. Manjari Medika Grape Seed Extract Protects Methotrexate-Induced Hepatic Inflammation: Involvement of NF-κB/NLRP3 and Nrf2/HO-1 Signaling System. J Inflamm Res 2023; 16:467-492. [PMID: 36785716 PMCID: PMC9922067 DOI: 10.2147/jir.s338888] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 08/20/2022] [Indexed: 02/09/2023] Open
Abstract
Objective Grape Seed Extract is a natural source of various polyphenols, which have been shown to possess potent antioxidant and free radical-scavenging activities. The earlier studies have reported that grape seed extract exhibits broad-spectrum pharmacological activities. Therefore, studying the hepatoprotective effects and elucidation of mechanisms of action of the Indian Variety, Manjari Medika grape seed extract (GSE), may give an insight into therapeutic benefits. Methotrexate (MTX) is the first-line pharmacological therapy for different rheumatic diseases. The major adverse events such as hepatotoxicity are evident even in the low doses used for the treatment. The present study investigated the role of MTX on hepatic damage in murine liver and the plausible protective effects of the Indian grape variety, Manjari Medika grape seed extract, in ameliorating it. Methods and Results To assess the hepatological modulation, mice were divided into eight groups to investigate the ameliorative potential of this GSE (75 and 125 mg/kg) and correlate the experimental findings. The active components of the extract were assessed through UPLC-(ESI)-QToF-MS analysis. On the other hand, various biochemical and immunological indices were carried out to correlate the experimental data. The result demonstrated that the prophylactic administration of GSE reduced MTX-induced hepatic toxicity indices, which subsequently restored the hepatic morphological architecture. Moreover, the application of GSE in a dual dosage (75 and 125 mg/kg) suppressed MTX-induced reactive oxygen species generation, followed by lipid peroxidation and cellular nitrite formation. MTX-induced inflammasome activation through the redox-assisted cascade of TLR4/NF-κB signaling was further reduced by applying the GSE. The results showed that the activation of cytoprotective transcription factor Nrf2 enhanced the level of endogenous antioxidants. Furthermore, through the regulation of TLR4/NF-κB and Nrf2/HO-1 axis, this extract could reduce the MTX-mediated hepatic damage. Conclusion Our findings suggest that Manjari Medika seed extract could be used as a therapeutic agent to relieve the side effects of MTX and other hepatic disorders.
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Affiliation(s)
- Krishnendu Manna
- Department of Food & Nutrition, University of Kalyani, Nadia, West Bengal, India
| | - Zareen S Khan
- National Referral Laboratory, ICAR-National Research Centre for Grapes, Pune, Maharashtra, 412307, India
| | - Moumita Saha
- Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, Kolkata, West Bengal, 700032, India
| | - Snehasis Mishra
- Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, Kolkata, West Bengal, 700032, India
| | - Nilesh Gaikwad
- ICAR-National Research Centre on Pomegranate, Solapur, Maharashtra, 413255, India
| | - Jatindra Nath Bhakta
- Department of Food & Nutrition, University of Kalyani, Nadia, West Bengal, India
| | - Kaushik Banerjee
- National Referral Laboratory, ICAR-National Research Centre for Grapes, Pune, Maharashtra, 412307, India,Kaushik Banerjee, National Referral Laboratory, ICAR-National Research Centre for Grapes, Pune, Maharashtra, 412307, India, Email
| | - Krishna Das Saha
- Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, Kolkata, West Bengal, 700032, India,Correspondence: Krishna Das Saha, Cancer Biology and Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S.C. Mullick Road, Kolkata, West Bengal, 700032, India, Tel +91 33 2499 5810, Fax +91 33 2473 5197, Email
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3
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Kim AD, Kim SE, Leszczynska A, Kaufmann B, Reca A, Kim DJ, Feldstein AE. Dual role of neutrophils in modulating liver injury and fibrosis during development and resolution of diet-induced murine steatohepatitis. Sci Rep 2021; 11:24194. [PMID: 34921208 PMCID: PMC8683497 DOI: 10.1038/s41598-021-03679-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 12/03/2021] [Indexed: 02/06/2023] Open
Abstract
Inflammatory changes in the liver represent a key feature of non-alcoholic steatohepatitis (NASH), the progressive form of non-alcoholic fatty liver disease (NAFLD). Innate immune activation including hepatic neutrophilic infiltration acts as an important inflammatory trigger as well as a potential mediator of inflammation resolution. In this study, we dissected the effects of neutrophil depletion via anti-lymphocyte antigen 6 complex locus G6D (Ly6G) antibodies administration during ongoing high fat-fructose-cholesterol (FFC) diet-induced murine NASH and during inflammation resolution by switching into a low-fat control diet. During NASH progression, protective effects were shown as HSC activation, cell infiltration and activation of pro-inflammatory macrophages were ameliorated. Furthermore, these changes were contrasted with the effects observed when neutrophil depletion was performed during the resolution phase. Impaired resolving mechanisms, such as a failure to balance the pro and anti-inflammatory cytokines ratio, deficient macrophage phenotypic switch into a pro-restorative profile, and defective repair and remodeling processes were observed when neutrophils were depleted in this scenario. This study described phase-dependent contrasting roles of neutrophils as triggers and pro-resolutive mediators of liver injury and fibrosis associated with diet-induced NASH in mice. These findings have important translational implications at the time of designing NASH therapeutic strategies.
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Affiliation(s)
- Andrea D Kim
- Department of Pediatrics, University of California San Diego, La Jolla, USA
| | - Sung Eun Kim
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Republic of Korea
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, Republic of Korea
| | | | - Benedikt Kaufmann
- Department of Pediatrics, University of California San Diego, La Jolla, USA
- Department of Surgery, TUM School of Medicine, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Agustina Reca
- Department of Pediatrics, University of California San Diego, La Jolla, USA
| | - Dong Joon Kim
- Department of Internal Medicine, Hallym University College of Medicine, Chuncheon, Republic of Korea
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, Republic of Korea
| | - Ariel E Feldstein
- Department of Pediatrics, University of California San Diego, La Jolla, USA.
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Feng L, Huang F, Ma Y, Tang J. The Effect of High-Fat Diet and Exercise Intervention on the TNF-α Level in Rat Spleen. Front Immunol 2021; 12:671167. [PMID: 34975827 PMCID: PMC8714663 DOI: 10.3389/fimmu.2021.671167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 08/05/2021] [Indexed: 01/22/2023] Open
Abstract
High-fat diet (HFD) consumption can trigger chronic inflammation in some tissues. However, it remains unclear if HFD induces chronic inflammation in the spleen. This investigation aims to address the effect of HFD consumption and exercise intervention on the level of tumor necrosis factor alpha (TNF-α) in the spleen. Rats were subjected to HFD feeding and/or moderate-intensity treadmill running. The TNF-α levels in plasma and spleen were detected by ELISA. The mass and total cell numbers of the spleen were measured. In addition, the expression of TNF-α and its relevant gene mRNAs in macrophages from the spleen were analyzed by qRT-PCR. We found that HFD consumption did not significantly affect the mass and total cell numbers of the spleen. However, HFD consumption significantly increased splenic TNF-α level, the expression of TNF-α, toll-like receptor 4, and nuclear factor κB p65 mRNAs. In contrast, the expression of nicotinic acetylcholine receptor alpha 7 subunit (α7nAChR) mRNA in macrophages was downregulated. Additionally, exercise abolished the increase in splenic TNF-α level as well as the abnormal expression of TNF-α and related gene mRNAs in macrophages in HFD-fed rats. In conclusion, our results reveal that HFD consumption increases TNF-α level in the spleen, which is along with upregulation of the expression of TLR4 and NF-κB mRNAs as well as downregulation of the expression of α7nAChR mRNA in splenic macrophages in rats. Exercise abolished detrimental effects of HFD on TNF-α level in the spleen and prevented abnormal expression of these genes in the macrophages from rat spleen.
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Affiliation(s)
- Lin Feng
- Sport Hospital Affiliated to Chengdu Sport University, Chengdu Sport University, Chengdu, China
| | - Feiyun Huang
- Key Laboratory of Bio-Resources and Eco-Environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, China
| | - Yinan Ma
- Department of Physical Education, Yili Normal University, Yining, China
- *Correspondence: Yinan Ma, ; Jialing Ting,
| | - Jialing Tang
- Department of P.E., Central South University, Changsha, China
- *Correspondence: Yinan Ma, ; Jialing Ting,
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Ito S, Nakashima H, Ishikiriyama T, Nakashima M, Yamagata A, Imakiire T, Kinoshita M, Seki S, Kumagai H, Oshima N. Effects of a CCR2 antagonist on macrophages and Toll-like receptor 9 expression in a mouse model of diabetic nephropathy. Am J Physiol Renal Physiol 2021; 321:F757-F770. [PMID: 34719947 DOI: 10.1152/ajprenal.00191.2021] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 10/19/2021] [Indexed: 12/24/2022] Open
Abstract
The pathogenesis of diabetic nephropathy (DN) is related to macrophage (Mφ) recruitment to the kidneys, tumor necrosis factor-α (TNF-α) production, and oxidative stress. Toll-like receptor 9 (TLR9) activation is reportedly involved in systemic inflammation, and it exacerbates this condition in metabolic syndrome. Therefore, we hypothesized that TLR9 plays a role in the pathogenesis of DN. Two subsets of kidney Mφs in DN model (db/db) mice were analyzed using flow cytometry to evaluate their distribution and TLR9 expression and function. Mice were administered the CCR2 antagonist INCB3344 for 8 wk; changes in Mφ distribution and function and its therapeutic effects on DN pathology were examined. Bone marrow-derived CD11bhigh (BM-Mφ) and tissue-resident CD11blow Mφs (Res-Mφ) were identified in the mouse kidneys. As DN progressed, the BM-Mφ number, TLR9 expression, and TNF-α production increased significantly. In Res-Mφs, reactive oxygen species (ROS) production and phagocytic activity were enhanced. INCB3344 decreased albuminuria, serum creatinine level, BM-Mφ abundance, TLR9 expression, and TNF-α production by BM-Mφs and ROS production by Res-Mφs. Both increased activation of BM-Mφ via TLR9 and TNF-α production and increased ROS production by Res-Mφs were involved in DN progression. Thus, inactivating Mφs and their TLR9 expression by INCB3344 is a potential therapeutic strategy for DN.NEW & NOTEWORTHY We classified kidney macrophages (Mφs) into bone marrow-derived Mφs (BM-Mφs) expressing high CD11b and tissue-specific resident Mφ (Res-Mφs) expressing low CD11b. In diabetic nephropathy (DN) model mice, Toll-like receptor 9 (TLR9) expression and TNF-α production via TLR9 activation in BM-Mφs and ROS production in Res-Mφs were enhanced. Furthermore, CCR2 antagonist suppressed the kidney infiltration of BM-Mφs and their function and the ROS production by Res-Mφs, with concomitant TLR9 suppression. Our study presents a new therapeutic strategy for DN.
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Affiliation(s)
- Seigo Ito
- Department of Nephrology and Endocrinology, National Defense Medical College, Tokorozawa, Japan
| | - Hiroyuki Nakashima
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Japan
| | - Takuya Ishikiriyama
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Japan
| | - Masahiro Nakashima
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Japan
| | - Akira Yamagata
- Department of Nephrology and Endocrinology, National Defense Medical College, Tokorozawa, Japan
| | - Toshihiko Imakiire
- Department of Nephrology and Endocrinology, National Defense Medical College, Tokorozawa, Japan
| | - Manabu Kinoshita
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Japan
| | - Shuhji Seki
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Japan
| | - Hiroo Kumagai
- Department of Nephrology and Endocrinology, National Defense Medical College, Tokorozawa, Japan
| | - Naoki Oshima
- Department of Nephrology and Endocrinology, National Defense Medical College, Tokorozawa, Japan
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Owen A, Newsome PN. Mesenchymal Stromal Cells, a New Player in Reducing Complications From Liver Transplantation? Front Immunol 2020; 11:1306. [PMID: 32636850 PMCID: PMC7318292 DOI: 10.3389/fimmu.2020.01306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 05/22/2020] [Indexed: 12/12/2022] Open
Abstract
In response to the global burden of liver disease there has been a commensurate increase in the demand for liver transplantation. However, due to a paucity of donor organs many centers have moved toward the routine use of marginal allografts, which can be associated with a greater risk of complications and poorer clinical outcomes. Mesenchymal stromal cells (MSC) are a multi-potent progenitor cell population that have been utilized to modulate aberrant immune responses in acute and chronic inflammatory conditions. MSC exert an immunomodulatory effect on innate and adaptive immune systems through the release of both paracrine soluble factors and extracellular vesicles. Through these routes MSC can switch the regulatory function of the immune system through effects on macrophages and T regulatory cells enabling a switch of phenotype from injury to restoration. A key benefit seems to be their ability to tailor their response to the inflammatory environment without compromising the host ability to fight infection. With over 200 clinical trials registered to examine MSC therapy in liver disease and an increasing number of trials of MSC therapy in solid organ transplant recipients, there is increasing consideration for their use in liver transplantation. In this review we critically appraise the potential role of MSC therapy in the context of liver transplantation, including their ability to modulate reperfusion injury, their role in the reduction of medium term complications in the biliary tree and their potential to enhance tolerance in transplanted organs.
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Affiliation(s)
- Andrew Owen
- National Institute for Health Research Birmingham, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust, University of Birmingham, Birmingham, United Kingdom.,Department of Anesthesia and Critical Care, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
| | - Philip N Newsome
- National Institute for Health Research Birmingham, Biomedical Research Centre at University Hospitals Birmingham NHS Foundation Trust, University of Birmingham, Birmingham, United Kingdom.,Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, United Kingdom.,Liver Unit, University Hospitals Birmingham NHS Foundation Trust, Birmingham, United Kingdom
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7
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Zeng T, Deng G, Zhong W, Gao Z, Ma S, Mo C, Li Y, Huang S, Zhou C, Lai Y, Xie S, Xie Z, Chen Y, He S, Lv Z, Gao L. Indoleamine 2, 3-dioxygenase 1enhanceshepatocytes ferroptosis in acute immune hepatitis associated with excess nitrative stress. Free Radic Biol Med 2020; 152:668-679. [PMID: 31945497 DOI: 10.1016/j.freeradbiomed.2020.01.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Accepted: 01/09/2020] [Indexed: 12/16/2022]
Abstract
Ferroptosis is a recently recognized form of regulated cell death that is characterized by lipid peroxidation. However, the molecular mechanisms of ferroptosis in acute immune hepatitis (AIH) are largely unknown. In this study, we investigated the classical ferroptotic events in the livers of mice with concanavalin A (ConA) to induce AIH. The dramatically upregulated gene indoleamine 2, 3-dioxygenase 1 (IDO1) was identified with AIH, and its role in generation of ferroptosis and reactive nitrogen species (RNS) was assessed both in vitro and in vivo by genetic deletion or pharmacologic inhibition of IDO1. We observed that ferroptosis contributed to the ConA-induced hepatic damage, which was confirmed by the therapeutical effects of ferroptosis inhibitor (ferrostatin-1). Noteworthy, upregulation of hepatic IDO1 and nitrative stress in ConA-induced hepatic damage were also remarkably inhibited by the ferroptosis abolishment. Additionally, IDO1 deficiency contributed to ferroptosis resistance by activating solute carrier family 7 member 11 (SLC7A11; also known as xCT) expression, accompanied with the reductions of murine liver lesions and RNS. Meanwhile, IDO inhibitor 1-methyl tryptophan alleviated murine liver damage with the reduction of inducible nitric oxide synthase and 3-nitrotyrosine expression. Consistent with the results in vivo, hepatocytes-specific knockdown of IDO1 led to ferroptosis resistance upon exposure to ferroptosis-inducing compound (Erastin) in vitro, whereas IDO1 overexpression aggravated the classical ferroptotic events, and the RNS stress. Overall, these results revealed a novel molecular mechanism of ferroptosis with the key feature of nitrative stress in ConA-induced liver injury, and also identified IDO1-dependent ferroptosis as a potential target for the treatment of AIH.
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Affiliation(s)
- Ting Zeng
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Guanghui Deng
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Weichao Zhong
- Shenzhen Traditional Chinese Medicine Hospital, No.1, Fuhua Road, Futian District, Shenzhen, Guangdong, China
| | - Zhuowei Gao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Shuoyi Ma
- Guangzhou First People's Hospital, School of Medicine, South China University of Technology, Guangzhou, Guangdong, China
| | - Chan Mo
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Yunjia Li
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Sha Huang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Chuying Zhou
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Yuqi Lai
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Shuwen Xie
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Zeping Xie
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Yuyao Chen
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China
| | - Songqi He
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China.
| | - Zhiping Lv
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China.
| | - Lei Gao
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou, Guangdong, China.
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de Oliveira S, Houseright RA, Korte BG, Huttenlocher A. DnaJ-PKAc fusion induces liver inflammation in a zebrafish model of fibrolamellar carcinoma. Dis Model Mech 2020; 13:dmm042564. [PMID: 32102783 PMCID: PMC7197716 DOI: 10.1242/dmm.042564] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Accepted: 02/14/2020] [Indexed: 12/12/2022] Open
Abstract
Fibrolamellar carcinoma (FLC) is a rare liver cancer that affects adolescents and young adults. Genomic analysis of FLC has revealed a 400 kb deletion in chromosome 19 that leads to the chimeric transcript DNAJB1-PRKACA (DnaJ-PKAc), comprised of the first exon of heat shock protein 40 (DNAJB1) and exons 2-10 of the catalytic subunit of protein kinase A (PRKACA). Here, we report a new zebrafish model of FLC induced by ectopic expression of zebrafish Dnaja-Pkaca (zfDnaJa-Pkaca) in hepatocytes that is amenable to live imaging of early innate immune inflammation. Expression of zfDnaJa-Pkaca in hepatocytes induces hepatomegaly and increased hepatocyte size. In addition, FLC larvae exhibit early innate immune inflammation characterized by early infiltration of neutrophils and macrophages into the liver microenvironment. Increased Caspase-a (the zebrafish homolog for human caspase-1) activity was also found in the liver of FLC larvae, and pharmacological inhibition of Tnfα and caspase-a decreased liver size and inflammation. Overall, these findings show that innate immune inflammation is an early feature in a zebrafish model of FLC and that pharmacological inhibition of TNFα or caspase-1 activity might be targets to treat inflammation and progression in FLC patients.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Sofia de Oliveira
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Ruth A Houseright
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Benjamin G Korte
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Anna Huttenlocher
- Department of Medical Microbiology and Immunology, University of Wisconsin-Madison, Madison, WI 53706, USA
- Department of Pediatrics, University of Wisconsin-Madison, Madison, WI 53792, USA
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9
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Sun H, Jiang J, Gong L, Li X, Yang Y, Luo Y, Guo Z, Lu R, Li H, Li J, Zhao J, Yang N, Li Y. Voltage-gated sodium channel inhibitor reduces atherosclerosis by modulating monocyte/macrophage subsets and suppressing macrophage proliferation. Biomed Pharmacother 2019; 120:109352. [DOI: 10.1016/j.biopha.2019.109352] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/13/2019] [Accepted: 08/14/2019] [Indexed: 12/19/2022] Open
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Endo-Umeda K, Makishima M. Liver X Receptors Regulate Cholesterol Metabolism and Immunity in Hepatic Nonparenchymal Cells. Int J Mol Sci 2019; 20:ijms20205045. [PMID: 31614590 PMCID: PMC6834202 DOI: 10.3390/ijms20205045] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 10/06/2019] [Accepted: 10/09/2019] [Indexed: 02/07/2023] Open
Abstract
Excess dietary cholesterol intake and the dysregulation of cholesterol metabolism are associated with the pathogenesis and progression of nonalcoholic fatty liver disease, nonalcoholic steatohepatitis, and fibrosis. Hepatic accumulation of free cholesterol induces activation of nonparenchymal cells, including Kupffer cells, macrophages, and hepatic stellate cells, which leads to persistent inflammation and fibrosis. The nuclear receptors liver X receptor α (LXRα) and LXRβ act as negative regulators of cholesterol metabolism through the induction of hepatocyte cholesterol catabolism, excretion, and the reverse cholesterol transport pathway. Additionally, LXRs exert an anti-inflammatory effect in immune cell types, such as macrophages. LXR activation suppresses acute hepatic inflammation that is mediated by Kupffer cells/macrophages. Acute liver injury, diet-induced steatohepatitis, and fibrosis are exacerbated by significant hepatic cholesterol accumulation and inflammation in LXR-deficient mice. Therefore, LXRs regulate hepatic lipid metabolism and immunity and they are potential therapeutic targets in the treatment of hepatic inflammation that is associated with cholesterol accumulation.
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Affiliation(s)
- Kaori Endo-Umeda
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-kamicho, Itabashi-ku, Tokyo 173-8610, Japan.
| | - Makoto Makishima
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-kamicho, Itabashi-ku, Tokyo 173-8610, Japan.
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de Oliveira S, Houseright RA, Graves AL, Golenberg N, Korte BG, Miskolci V, Huttenlocher A. Metformin modulates innate immune-mediated inflammation and early progression of NAFLD-associated hepatocellular carcinoma in zebrafish. J Hepatol 2019; 70:710-721. [PMID: 30572006 PMCID: PMC6436385 DOI: 10.1016/j.jhep.2018.11.034] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Revised: 11/19/2018] [Accepted: 11/26/2018] [Indexed: 12/20/2022]
Abstract
BACKGROUND & AIMS Non-alcoholic fatty liver disease/non-alcoholic steatohepatitis (NAFLD/NASH) is an increasing clinical problem associated with progression to hepatocellular carcinoma (HCC). The effect of a high-fat diet on the early immune response in HCC is poorly understood, while the role of metformin in treating NAFLD and HCC remains controversial. Herein, we visualized the early immune responses in the liver and the effect of metformin on progression of HCC using optically transparent zebrafish. METHODS We used live imaging to visualize liver inflammation and disease progression in a NAFLD/NASH-HCC zebrafish model. We combined a high-fat diet with a transgenic zebrafish HCC model induced by hepatocyte-specific activated beta-catenin and assessed liver size, angiogenesis, micronuclei formation and inflammation in the liver. In addition, we probed the effects of metformin on immune cell composition and early HCC progression. RESULTS We found that a high-fat diet induced an increase in liver size, enhanced angiogenesis, micronuclei formation and neutrophil infiltration in the liver. Although macrophage number was not affected by diet, a high-fat diet induced changes in macrophage morphology and polarization with an increase in liver associated TNFα-positive macrophages. Treatment with metformin altered macrophage polarization, reduced liver size and reduced micronuclei formation in NAFLD/NASH-associated HCC larvae. Moreover, a high-fat diet reduced T cell density in the liver, which was reversed by treatment with metformin. CONCLUSIONS These findings suggest that diet alters macrophage polarization and exacerbates the liver inflammatory microenvironment and cancer progression in a zebrafish model of NAFLD/NASH-associated HCC. Metformin specifically affects the progression induced by diet and modulates the immune response by affecting macrophage polarization and T cell infiltration, suggesting possible effects of metformin on tumor surveillance. LAY SUMMARY This paper reports a new zebrafish model that can be used to study the effects of diet on liver cancer. We found that a high-fat diet promotes non-resolving inflammation in the liver and enhances cancer progression. In addition, we found that metformin, a drug used to treat diabetes, inhibits high-fat diet-induced cancer progression in this model, by reducing diet-induced non-resolving inflammation and potentially restoring tumor surveillance.
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Affiliation(s)
- Sofia de Oliveira
- Department of Medical Microbiology and Immunology, University of Wisconsin Madison, Madison, United States.
| | - Ruth A Houseright
- Department of Medical Microbiology and Immunology, University of Wisconsin Madison, Madison, United States
| | - Alyssa L Graves
- Department of Medical Microbiology and Immunology, University of Wisconsin Madison, Madison, United States
| | - Netta Golenberg
- Department of Medical Microbiology and Immunology, University of Wisconsin Madison, Madison, United States
| | - Benjamin G Korte
- Department of Medical Microbiology and Immunology, University of Wisconsin Madison, Madison, United States
| | - Veronika Miskolci
- Department of Medical Microbiology and Immunology, University of Wisconsin Madison, Madison, United States
| | - Anna Huttenlocher
- Department of Medical Microbiology and Immunology, University of Wisconsin Madison, Madison, United States; Department of Pediatrics, University of Wisconsin-Madison, Madison, United States.
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Abstract
The number of individuals aged 65 or older is projected to increase globally from 524 million in 2010 to nearly 1. 5 billion in 2050. Aged individuals are particularly at risk for developing chronic illness, while being less able to regenerate healthy tissue and tolerate whole organ transplantation procedures. In the liver, these age-related diseases include non-alcoholic fatty liver disease, alcoholic liver disease, hepatitis, fibrosis, and cirrhosis. Hepatic macrophages, a population comprised of both Kupffer cells and infiltrating monocyte derived macrophages, are implicated in several chronic liver diseases and also play important roles in the homeostatic functions of the liver. The effects of aging on hepatic macrophage population dynamics, polarization, and function are not well understood. Studies performed on macrophages derived from other aged sources, such as the bone marrow, peritoneal cavity, lungs, and brain, demonstrate general reductions in autophagy and phagocytosis, dysfunction in cytokine signaling, and altered morphology and distribution, likely mediated by epigenetic changes and mitochondrial defects, that may be applicable to hepatic macrophages. This review highlights recent findings in macrophage developmental biology and function, particularly in the liver, and discusses the role of macrophages in various age-related liver diseases. A better understanding of the biology of aging that influences hepatic macrophages and thus the progression of chronic liver disease will be crucial in order to develop new interventions and treatments for liver disease in aging populations.
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Affiliation(s)
- Elizabeth C Stahl
- Department of Bioengineering, Pittsburgh Liver Research Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Martin J Haschak
- Department of Bioengineering, Pittsburgh Liver Research Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Branimir Popovic
- Department of Bioengineering, Pittsburgh Liver Research Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States
| | - Bryan N Brown
- Department of Bioengineering, Pittsburgh Liver Research Center, McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, United States
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13
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Carolini Thiesen L, de Oliveira Nunes ML, Meyre-Silva C, Dávila Pastor V, de Andrade SF, Garcia Couto A, da Silva LM, Bellé Bresolin TM, Santin JR. The hydroethanolic Litchi chinensis leaf extract alleviate hepatic injury induced by carbon tetrachloride (CCl 4) through inhibition of hepatic inflammation. Biomed Pharmacother 2018; 107:929-936. [PMID: 30257405 DOI: 10.1016/j.biopha.2018.08.076] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/26/2018] [Accepted: 08/15/2018] [Indexed: 02/08/2023] Open
Abstract
Various medicinal plants are traditionally used in a hepatoprotective manner, like, for example, the Litchi chinensis leaf infusion that is employed in Chinese medicine as liver tonics to strengthen hepatic functioning. In this context, the present study was designed to evaluate the hepatoprotective and acute toxicological effects of hydroethanolic L. chinensis leaf extract in HepG2 cells and mice. Specifically, the cytotoxicity and hepatoprotective activities of L. chinensis leaf extract were evaluated in HepG2 cells and in vivo against carbon tetrachloride (CCl4)-induced acute liver injury. The administration of CCl4 in mice provokes cell swelling, loss of sinusoid capillary spaces and structural disarrangement of the hepatic lobe, apoptosis and leukocyte infiltration. Further, CCl4 evokes an increase in serum alanine aminotransferase (ALT), tumor necrosis factor (TNF) and interleukin-6 (IL-6) levels in hepatic tissue. However, Silymarin, the positive control, and the L. chinensis extract were able to restore the viability of cells treated with CCl4 at all concentrations evaluated, reduced the inflammatory parameters, TNF and IL-6, reestablished hepatic tissue morphology and did not induce acute toxicological alterations. The data obtained underscore that the extract from L. chinensis leaves features hepatoprotective activity, corroborating with ethnopharmacological use, and does not lead to acute toxicological effects.
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Affiliation(s)
| | | | | | | | - Sérgio Faloni de Andrade
- Postgraduation Program in Pharmaceutical Sciences, Itajaí, SC, Brazil; Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Itajaí, SC, Brazil; Pharmacy Course, Universidade do Vale de Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Angélica Garcia Couto
- Postgraduation Program in Pharmaceutical Sciences, Itajaí, SC, Brazil; Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Itajaí, SC, Brazil; Pharmacy Course, Universidade do Vale de Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Luisa Mota da Silva
- Postgraduation Program in Pharmaceutical Sciences, Itajaí, SC, Brazil; Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Itajaí, SC, Brazil; Pharmacy Course, Universidade do Vale de Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Tania Mari Bellé Bresolin
- Postgraduation Program in Pharmaceutical Sciences, Itajaí, SC, Brazil; Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Itajaí, SC, Brazil; Pharmacy Course, Universidade do Vale de Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - José Roberto Santin
- Postgraduation Program in Pharmaceutical Sciences, Itajaí, SC, Brazil; Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Itajaí, SC, Brazil.
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Endo-Umeda K, Nakashima H, Komine-Aizawa S, Umeda N, Seki S, Makishima M. Liver X receptors regulate hepatic F4/80 + CD11b + Kupffer cells/macrophages and innate immune responses in mice. Sci Rep 2018; 8:9281. [PMID: 29915246 PMCID: PMC6006359 DOI: 10.1038/s41598-018-27615-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 06/07/2018] [Indexed: 12/25/2022] Open
Abstract
The liver X receptors (LXRs), LXRα and LXRβ, are nuclear receptors that regulate lipid homeostasis. LXRs also regulate inflammatory responses in cultured macrophages. However, the role of LXRs in hepatic immune cells remains poorly characterized. We investigated the role of LXRs in regulation of inflammatory responses of hepatic mononuclear cells (MNCs) in mice. Both LXRα and LXRβ were expressed in mouse hepatic MNCs and F4/80+ Kupffer cells/macrophages. LXRα/β-knockout (KO) mice had an increased number of hepatic MNCs and elevated expression of macrophage surface markers and inflammatory cytokines compared to wild-type (WT) mice. Among MNCs, F4/80+CD11b+ cells, not F4/80+CD11b- or F4/80+CD68+ cells, were increased in LXRα/β-KO mice more than WT mice. Isolated hepatic MNCs and F4/80+CD11b+ cells of LXRα/β-KO mice showed enhanced production of inflammatory cytokines after stimulation by lipopolysaccharide or CpG-DNA compared to WT cells, and LXR ligand treatment suppressed lipopolysaccharide-induced cytokine expression in hepatic MNCs. Lipopolysaccharide administration also stimulated inflammatory cytokine production in LXRα/β-KO mice more effectively than WT mice. Thus, LXR deletion enhances recruitment of F4/80+CD11b+ Kupffer cells/macrophages and acute immune responses in the liver. LXRs regulate the Kupffer cell/macrophage population and innate immune and inflammatory responses in mouse liver.
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Affiliation(s)
- Kaori Endo-Umeda
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Hiroyuki Nakashima
- Department of Immunology and Microbiology, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan
| | - Shihoko Komine-Aizawa
- Division of Microbiology, Department of Pathology and Microbiology, Nihon University School of Medicine, 30-1 Oyaguchi-kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Naoki Umeda
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-kamicho, Itabashi-ku, Tokyo, 173-8610, Japan
| | - Shuhji Seki
- Department of Immunology and Microbiology, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513, Japan
| | - Makoto Makishima
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, 30-1 Oyaguchi-kamicho, Itabashi-ku, Tokyo, 173-8610, Japan.
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15
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Endo-Umeda K, Nakashima H, Umeda N, Seki S, Makishima M. Dysregulation of Kupffer Cells/Macrophages and Natural Killer T Cells in Steatohepatitis in LXRα Knockout Male Mice. Endocrinology 2018; 159:1419-1432. [PMID: 29409022 DOI: 10.1210/en.2017-03141] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 01/25/2018] [Indexed: 12/20/2022]
Abstract
Liver X receptor (LXR) α expression is mainly localized to metabolic tissues, such as the liver, whereas LXRβ is ubiquitously expressed. LXRα is activated by oxysterols and plays an important role in the regulation of lipid metabolism in metabolic tissues. In macrophages, LXRs stimulate reverse cholesterol transport and regulate immune responses. Although a high-cholesterol diet induces severe steatohepatitis in LXRα-knockout (KO) mice, the underlying mechanisms linking lipid metabolism and immune responses remain largely unknown. In this study, we investigated the role of LXRα in the pathogenesis of steatohepatitis by assessing the effects of a high-fat and high-cholesterol diet (HFCD) on hepatic immune cell proportion and function as well as lipid metabolism in wild-type (WT) and LXRα-KO mice. HFCD feeding induced severe steatohepatitis in LXRα-KO mice compared with WT mice. These mice had higher cholesterol levels in the plasma and the liver and dysregulated expression of LXR target and proinflammatory genes in both whole liver samples and isolated hepatic mononuclear cells. Flow cytometry showed an increase in CD68+CD11b+ Kupffer cells/macrophages and a decrease in invariant natural killer T cells in the liver of HFCD-fed LXRα-KO mice. These mice were more susceptible to lipopolysaccharide-induced liver injury and resistant to inflammatory responses against α-galactosylceramide or concanavalin-A treatment. The findings provide evidence for activation of bone marrow-derived Kupffer cells/macrophages and dysfunction of invariant natural killer T cells in LXRα-KO mouse liver. These findings indicate that LXRα regulates hepatic immune function along with lipid metabolism and protects against the pathogenesis of nonalcoholic steatohepatitis.
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Affiliation(s)
- Kaori Endo-Umeda
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, Itabashi-ku, Tokyo, Japan
| | - Hiroyuki Nakashima
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Naoki Umeda
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, Itabashi-ku, Tokyo, Japan
| | - Shuhji Seki
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Makoto Makishima
- Division of Biochemistry, Department of Biomedical Sciences, Nihon University School of Medicine, Itabashi-ku, Tokyo, Japan
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16
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Li H, Zhang L. Liver regeneration microenvironment of hepatocellular carcinoma for prevention and therapy. Oncotarget 2017; 8:1805-13. [PMID: 27655683 DOI: 10.18632/oncotarget.12101] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 09/12/2016] [Indexed: 02/06/2023] Open
Abstract
Research on liver cancer prevention and treatment has mainly focused on the liver cancer cells themselves. Currently, liver cancers are no longer viewed as only collections of genetically altered cells but as aberrant organs with a plastic stroma, matrix, and vasculature. Improving the microenvironment of the liver to promote liver regeneration and repair by affecting immune function, inflammation and vasculature can regulate the dynamic imbalance between normal liver regeneration and repair and abnormal liver regeneration, thus improving the microenvironment of liver regeneration for the prevention and treatment of liver cancer. This review addresses the basic theory of the liver regeneration microenvironment, including the latest findings on immunity, inflammation and vasculature. Attention is given to the potential design of molecular targets in the microenvironment of hepatocellular carcinoma (HCC). In an effort to improve the liver regeneration microenvironment of HCC, researchers have extensively utilized the enhancement of immunity, anti-inflammation and the vasculature niche, which are discussed in detail in this review. In addition, the authors summarize the latest pro-fibrotic transition characteristics of the vascular niche and review potential cell therapies for liver disease.
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17
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Chapelin F, Gao S, Okada H, Weber TG, Messer K, Ahrens ET. Fluorine-19 nuclear magnetic resonance of chimeric antigen receptor T cell biodistribution in murine cancer model. Sci Rep 2017; 7:17748. [PMID: 29255242 PMCID: PMC5735180 DOI: 10.1038/s41598-017-17669-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 11/28/2017] [Indexed: 01/07/2023] Open
Abstract
Discovery of effective cell therapies against cancer can be accelerated by the adaptation of tools to rapidly quantitate cell biodistribution and survival after delivery. Here, we describe the use of nuclear magnetic resonance (NMR) ‘cytometry’ to quantify the biodistribution of immunotherapeutic T cells in intact tissue samples. In this study, chimeric antigen receptor (CAR) T cells expressing EGFRvIII targeting transgene were labeled with a perfluorocarbon (PFC) emulsion ex vivo and infused into immunocompromised mice bearing subcutaneous human U87 glioblastomas expressing EGFRvIII and luciferase. Intact organs were harvested at day 2, 7 and 14 for whole-sample fluorine-19 (19F) NMR to quantitatively measure the presence of PFC-labeled CAR T cells, followed by histological validation. NMR measurements showed greater CAR T cell homing and persistence in the tumors and spleen compared to untransduced T cells. Tumor growth was monitored with bioluminescence imaging, showing that CAR T cell treatment resulted in significant tumor regression compared to untransduced T cells. Overall, 19F NMR cytometry is a rapid and quantitative method to evaluate cell biodistribution, tumor homing, and fate in preclinical studies.
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Affiliation(s)
- Fanny Chapelin
- Department of Bioengineering, University of California San Diego, San Diego, CA, USA
| | - Shang Gao
- Department of Radiology, University of California San Diego, San Diego, CA, USA
| | - Hideho Okada
- Department of Neurological Surgery, University of California San Francisco, San Francisco, CA, USA.,Cancer Immunotherapy Program, University of California San Francisco, San Francisco, CA, USA
| | - Thomas G Weber
- Department of Radiology, University of California San Diego, San Diego, CA, USA
| | - Karen Messer
- Cancer Prevention and Control Program, Moores Cancer Center, University of California San Diego, La Jolla, CA, USA
| | - Eric T Ahrens
- Department of Radiology, University of California San Diego, San Diego, CA, USA.
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18
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Kinoshita M, Miyazaki H, Nakashima H, Nakashima M, Nishikawa M, Ishikiriyama T, Kato S, Iwaya K, Hiroi S, Shinomiya N, Seki S. In vivo Lipopolysaccharide Tolerance Recruits CD11b+ Macrophages to the Liver with Enhanced Bactericidal Activity and Low Tumor Necrosis Factor-Releasing Capability, Resulting in Drastic Resistance to Lethal Septicemia. J Innate Immun 2017; 9:493-510. [PMID: 28675904 DOI: 10.1159/000475931] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 04/21/2017] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES In vivo lipopolysaccharide (LPS) tolerance on bacterial infection was investigated, focusing on liver macrophages. METHODS LPS tolerance was induced by intraperitoneal injections with 5 μg/kg of LPS for 3 consecutive days, and then mice were intravenously infected with Escherichia coli. RESULTS All LPS-primed mice survived lethal bacterial infection. Drastic enhancement of bactericidal activity of liver macrophages strongly contributed to bacterial clearance. Although LPS-primed mice produced substantial amounts of tumor necrosis factor (TNF) inside the liver, TNF efflux into the systemic circulation was markedly suppressed. These mice showed a dramatic increase in CD11b+ monocyte- derived macrophages in the liver. The CD11b+ macrophages that increased in LPS-primed mice were those with strong phagocytic/bactericidal activity and an upregulated expression of Fcγ receptor I, but the subfraction with a potent TNF-producing capacity and poor phagocytic activity diminished. The adoptive transfer of CD11b+ macrophages from LPS-primed mice to control mice increased survival after bacterial infection and reduced the elevation of plasma TNF. LPS priming did not affect the CD68+ resident Kupffer cells, and CD68+ Kupffer cell-depleted mice still exhibited LPS tolerance with strong resistance to bacteremia. CONCLUSIONS LPS tolerance recruits CD11b+ macrophages to the liver with enhanced bactericidal activity, which plays a central role in resistance to lethal bacteremia.
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Affiliation(s)
- Manabu Kinoshita
- Department of Immunology and Microbiology, National Defense Medical College, Tokorozawa, Japan
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Nakashima H, Nakashima M, Kinoshita M, Ikarashi M, Miyazaki H, Hanaka H, Imaki J, Seki S. Activation and increase of radio-sensitive CD11b+ recruited Kupffer cells/macrophages in diet-induced steatohepatitis in FGF5 deficient mice. Sci Rep. 2016;6:34466. [PMID: 27708340 PMCID: PMC5052649 DOI: 10.1038/srep34466] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Accepted: 09/13/2016] [Indexed: 02/07/2023] Open
Abstract
We have recently reported that Kupffer cells consist of two subsets, radio-resistant resident CD68+ Kupffer cells and radio-sensitive recruited CD11b+ Kupffer cells/macrophages (Mφs). Non-alcoholic steatohepatitis (NASH) is characterized not only by hepatic steatosis but also chronic inflammation and fibrosis. In the present study, we investigated the immunological mechanism of diet-induced steatohepatitis in fibroblast growth factor 5 (FGF5) deficient mice. After consumption of a high fat diet (HFD) for 8 weeks, FGF5 null mice developed severe steatohepatitis and fibrosis resembling human NASH. F4/80+ Mφs which were both CD11b and CD68 positive accumulated in the liver. The production of TNF and FasL indicated that they are the pivotal effectors in this hepatitis. The weak phagocytic activity and lack of CRIg mRNA suggested that they were recruited Mφs. Intermittent exposure to 1 Gy irradiation markedly decreased these Mφs and dramatically inhibited liver inflammation without attenuating steatosis. However, depletion of the resident subset by clodronate liposome (c-lipo) treatment increased the Mφs and tended to exacerbate disease progression. Recruited CD11b+ CD68+ Kupffer cells/Mφs may play an essential role in steatohepatitis and fibrosis in FGF5 null mice fed with a HFD. Recruitment and activation of bone marrow derived Mφs is the key factor to develop steatohepatitis from simple steatosis.
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Soffientini U, Graham A. Intracellular cholesterol transport proteins: roles in health and disease. Clin Sci (Lond) 2016; 130:1843-59. [DOI: 10.1042/cs20160339] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 07/12/2016] [Indexed: 12/13/2022]
Abstract
Effective cholesterol homoeostasis is essential in maintaining cellular function, and this is achieved by a network of lipid-responsive nuclear transcription factors, and enzymes, receptors and transporters subject to post-transcriptional and post-translational regulation, whereas loss of these elegant, tightly regulated homoeostatic responses is integral to disease pathologies. Recent data suggest that sterol-binding sensors, exchangers and transporters contribute to regulation of cellular cholesterol homoeostasis and that genetic overexpression or deletion, or mutations, in a number of these proteins are linked with diseases, including atherosclerosis, dyslipidaemia, diabetes, congenital lipoid adrenal hyperplasia, cancer, autosomal dominant hearing loss and male infertility. This review focuses on current evidence exploring the function of members of the ‘START’ (steroidogenic acute regulatory protein-related lipid transfer) and ‘ORP’ (oxysterol-binding protein-related proteins) families of sterol-binding proteins in sterol homoeostasis in eukaryotic cells, and the evidence that they represent valid therapeutic targets to alleviate human disease.
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21
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Sato K, Hall C, Glaser S, Francis H, Meng F, Alpini G. Pathogenesis of Kupffer Cells in Cholestatic Liver Injury. Am J Pathol 2016; 186:2238-47. [PMID: 27452297 DOI: 10.1016/j.ajpath.2016.06.003] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/18/2016] [Accepted: 06/07/2016] [Indexed: 02/08/2023]
Abstract
Kupffer cells are the resident macrophages in the liver. They are located in hepatic sinusoid, which allows them to remove foreign materials, pathogens, and apoptotic cells efficiently. Activated Kupffer cells secrete various mediators, including cytokines and chemokines, to initiate immune responses, inflammation, or recruitment of other liver cells. Bile duct ligation (BDL) surgery in rodents is often studied as an animal model of cholestatic liver disease, characterized by obstruction of bile flow. BDL mice show altered functional activities of Kupffer cells compared with sham-operated mice, including elevated cytokine secretion and impaired bacterial clearance. Various mediators produced by other liver cells can regulate Kupffer cell activation, which suggest that Kupffer cells orchestrate with other liver cells to relay inflammatory signals and to maintain liver homeostasis during BDL-induced liver injury. Blocking or depletion of Kupffer cells, an approach for the treatment of liver diseases, has shown controversial implications. Procedures in Kupffer cell research have limitations and may produce various results in Kupffer cell research. It is important, however, to reveal underlying mechanisms of activation and functions of Kupffer cells, followed by hepatic inflammation and fibrosis. This review summarizes present Kupffer cell studies in cholestatic liver injury.
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Affiliation(s)
- Keisaku Sato
- Research, Central Texas Veterans Health Care System, Temple, Texas; Department of Medicine, Texas A&M Health Science Center, College of Medicine, Temple, Texas; Scott & White Digestive Disease Research Center, Scott & White, Temple, Texas
| | - Chad Hall
- Department of Medicine, Texas A&M Health Science Center, College of Medicine, Temple, Texas; Academic Research Integration, Department Surgery, Baylor Scott & White Healthcare, Temple, Texas
| | - Shannon Glaser
- Research, Central Texas Veterans Health Care System, Temple, Texas; Department of Medicine, Texas A&M Health Science Center, College of Medicine, Temple, Texas; Scott & White Digestive Disease Research Center, Scott & White, Temple, Texas
| | - Heather Francis
- Research, Central Texas Veterans Health Care System, Temple, Texas; Department of Medicine, Texas A&M Health Science Center, College of Medicine, Temple, Texas; Scott & White Digestive Disease Research Center, Scott & White, Temple, Texas
| | - Fanyin Meng
- Research, Central Texas Veterans Health Care System, Temple, Texas; Department of Medicine, Texas A&M Health Science Center, College of Medicine, Temple, Texas; Scott & White Digestive Disease Research Center, Scott & White, Temple, Texas
| | - Gianfranco Alpini
- Research, Central Texas Veterans Health Care System, Temple, Texas; Department of Medicine, Texas A&M Health Science Center, College of Medicine, Temple, Texas; Scott & White Digestive Disease Research Center, Scott & White, Temple, Texas.
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Cai B, Luo YL, Wang SJ, Wei WY, Zhang XH, Huang W, Li T, Zhang M, Wu N, Roodrajeetsing G, Zhang S. Does Citrulline Have Protective Effects on Liver Injury in Septic Rats? Biomed Res Int 2016; 2016:1469590. [PMID: 27195281 DOI: 10.1155/2016/1469590] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/29/2016] [Accepted: 03/31/2016] [Indexed: 12/31/2022]
Abstract
Citrulline (Cit) supplementation was proposed to serve as a therapeutic intervention to restore arginine (Arg) concentrations and improve related functions in sepsis. This study explored whether citrulline had positive effects on liver injury and cytokine release in the early stages of sepsis. The cecal ligation and puncture (CLP) model was utilized in our study. Rats were divided into four groups: normal, Cit, CLP, and CLP+Cit. The CLP group and CLP+Cit group were separated into 6-, 12-, and 24-hour groups, according to the time points of sacrifice after surgery. Intragastric administration of L-citrulline was applied to rats in Cit and CLP+Cit groups before surgery. Serum AST and ALT levels and levels of MDA, SOD, NO, and iNOS in the liver tissues were evaluated. Plasma concentrations of Cit and Arg were assessed using HPLC-MS/MS. Serum concentrations of cytokines and chemokines were calculated by Luminex. Results showed SOD activities of CLP+Cit groups were significantly higher than that of CLP groups, contrasting with the MDA and NO levels which were significantly lower in CLP+Cit groups than in CLP groups. In addition, plasma concentrations of TNF-α, IL-6, and IL-1β were significantly lower in the CLP+Cit 6-hour group than in the CLP 6-hour group.
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Robert O, Boujedidi H, Bigorgne A, Ferrere G, Voican CS, Vettorazzi S, Tuckermann JP, Bouchet-Delbos L, Tran T, Hemon P, Puchois V, Dagher I, Douard R, Gaudin F, Gary-Gouy H, Capel F, Durand-Gasselin I, Prévot S, Rousset S, Naveau S, Godot V, Emilie D, Lombès M, Perlemuter G, Cassard AM. Decreased expression of the glucocorticoid receptor-GILZ pathway in Kupffer cells promotes liver inflammation in obese mice. J Hepatol 2016; 64:916-24. [PMID: 26639395 DOI: 10.1016/j.jhep.2015.11.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Revised: 11/12/2015] [Accepted: 11/13/2015] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Kupffer cells (KC) play a key role in the onset of inflammation in non-alcoholic steatohepatitis (NASH). The glucocorticoid receptor (GR) induces glucocorticoid-induced leucine zipper (GILZ) expression in monocytes/macrophages and is involved in several inflammatory processes. We hypothesized that the GR-GILZ axis in KC may contribute to the pathophysiology of obesity-induced liver inflammation. METHODS By using a combination of primary cell culture, pharmacological experiments, mice deficient for the Gr specifically in macrophages and transgenic mice overexpressing Gilz in macrophages, we explored the involvement of the Gr-Gilz axis in KC in the pathophysiology of obesity-induced liver inflammation. RESULTS Obesity was associated with a downregulation of the Gr and Gilz, and an impairment of Gilz induction by lipopolysaccharide (LPS) and dexamethasone (DEX) in KC. Inhibition of Gilz expression in isolated KC transfected with Gilz siRNA demonstrated that Gilz downregulation was sufficient to sensitize KC to LPS. Conversely, liver inflammation was decreased in obese transgenic mice specifically overexpressing Gilz in macrophages. Pharmacological inhibition of the Gr showed that impairment of Gilz induction in KC by LPS and DEX in obesity was driven by a downregulation of the Gr. In mice specifically deficient for Gr in macrophages, Gilz expression was low, leading to an exacerbation of obesity-induced liver inflammation. CONCLUSIONS Obesity is associated with a downregulation of the Gr-Gilz axis in KC, which promotes liver inflammation. The Gr-Gilz axis in KC is an important target for the regulation of liver inflammation in obesity.
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Affiliation(s)
- Olivier Robert
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France
| | - Hédia Boujedidi
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France
| | - Amélie Bigorgne
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France
| | - Gladys Ferrere
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France
| | | | - Sabine Vettorazzi
- Institute of Comparative Molecular Endocrinology (CME), Ulm University, 89081 Ulm, Germany
| | - Jan Peter Tuckermann
- Institute of Comparative Molecular Endocrinology (CME), Ulm University, 89081 Ulm, Germany
| | | | - Thi Tran
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France
| | - Patrice Hemon
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France
| | - Virginie Puchois
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France
| | - Ibrahim Dagher
- Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France; AP-HP, Hôpital Antoine-Béclère, Service de chirurgie minimale invasive, DHU Hépatinov, Clamart, France
| | - Richard Douard
- AP-HP, Hôpital Européen Georges Pompidou, Service de chirurgie, Paris, France; AP-HP, Hôpital Avicenne, Service de chirurgie, Bobigny, France
| | - Francoise Gaudin
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; IFR 141 Institut Paris-Sud d'Innovation Thérapeutique, Châtenay-Malabry, France
| | - Hélène Gary-Gouy
- IFR 141 Institut Paris-Sud d'Innovation Thérapeutique, Châtenay-Malabry, France
| | - Francis Capel
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France
| | | | - Sophie Prévot
- AP-HP, Hôpital Antoine-Béclère, Service d'anatomie pathologique, Clamart, France
| | - Sophie Rousset
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France
| | - Sylvie Naveau
- AP-HP, Hôpital Antoine-Béclère, Service d'hépato-gastroentérologie, Clamart, France
| | - Véronique Godot
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France
| | - Dominique Emilie
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France
| | - Marc Lombès
- Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France; INSERM, U693, Le Kremlin-Bicêtre, France; AP-HP, Hôpital Antoine-Béclère, Service d'anatomie pathologique, Clamart, France; AP-HP, Hôpital Bicêtre, Service d'Endocrinologie et Maladies de la Reproduction, Le Kremlin-Bicêtre, France
| | - Gabriel Perlemuter
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France; AP-HP, Hôpital Antoine-Béclère, Service d'hépato-gastroentérologie, Clamart, France.
| | - Anne-Marie Cassard
- INSERM UMR996 - Inflammation, Chemokines and Immunopathology, Clamart, France; Univ Paris-Sud, Univ Paris-Saclay, DHU Hepatinov, Labex Lermit, Kremlin-Bicêtre, France.
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Nati M, Haddad D, Birkenfeld AL, Koch CA, Chavakis T, Chatzigeorgiou A. The role of immune cells in metabolism-related liver inflammation and development of non-alcoholic steatohepatitis (NASH). Rev Endocr Metab Disord 2016; 17:29-39. [PMID: 26847547 DOI: 10.1007/s11154-016-9339-2] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The low grade inflammatory state present in obesity promotes the progression of Non-Alcoholic Fatty Liver Disease (NAFLD). In Non-Alcoholic Steatohepatitis (NASH), augmented hepatic steatosis is accompanied by aberrant intrahepatic inflammation and exacerbated hepatocellular injury. NASH is an important disorder and can lead to fibrosis, cirrhosis and even neoplasia. The pathology of NASH involves a complex network of mechanisms, including increased infiltration of different subsets of immune cells, such as monocytes, T-lymphocytes and neutrophils, to the liver, as well as activation and in situ expansion of liver resident cells such as Kupffer cells or stellate cells. In this review, we summarize recent advances regarding understanding the role of the various cells of the innate and adaptive immunity in NASH development and progression, and discuss possible future therapeutic options and tools to interfere with disease progression.
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Affiliation(s)
- Marina Nati
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany
| | - David Haddad
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany
| | - Andreas L Birkenfeld
- Section of Metabolic Vascular Medicine, Medical Clinic III, Faculty of Medicine, TU Dresden, Dresden, Germany
- Paul Langerhans Institute Dresden of the Helmholtz Center Munich at University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- Division of Diabetes and Nutritional Sciences, Rayne Institute, King's College London, London, UK
| | - Christian A Koch
- Division of Endocrinology, Endocrine Tumor Program, Cancer Institute, University of Mississippi Medical Center, Jackson, MS, USA
| | - Triantafyllos Chavakis
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany
- Paul Langerhans Institute Dresden of the Helmholtz Center Munich at University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, TU Dresden, Dresden, Germany
| | - Antonios Chatzigeorgiou
- Department of Clinical Pathobiochemistry, Faculty of Medicine, Technische Universität Dresden, MTZ, Fiedlerstrasse 42, 01307, Dresden, Germany.
- Paul Langerhans Institute Dresden of the Helmholtz Center Munich at University Hospital and Faculty of Medicine, TU Dresden, Dresden, Germany.
- German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.
- Institute for Clinical Chemistry and Laboratory Medicine, Faculty of Medicine, TU Dresden, Dresden, Germany.
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Abstract
This review explores the relationship between mitochondrial structure and function in the regulation of macrophage cholesterol metabolism and proposes that mitochondrial dysfunction contributes to loss of the elegant homeostatic mechanisms which normally maintain cellular sterol levels within defined limits. Mitochondrial sterol 27-hydroxylase (CYP27A1) can generate oxysterol activators of liver X receptors which heterodimerise with retinoid X receptors, enhancing the transcription of ATP binding cassette transporters (ABCA1, ABCG1, and ABCG4), that can remove excess cholesterol via efflux to apolipoproteins A-1, E, and high density lipoprotein, and inhibit inflammation. The activity of CYP27A1 is regulated by the rate of supply of cholesterol substrate to the inner mitochondrial membrane, mediated by a complex of proteins. The precise identity of this dynamic complex remains controversial, even in steroidogenic tissues, but may include steroidogenic acute regulatory protein and the 18 kDa translocator protein, together with voltage-dependent anion channels, ATPase AAA domain containing protein 3A, and optic atrophy type 1 proteins. Certainly, overexpression of StAR and TSPO proteins can enhance macrophage cholesterol efflux to apoA-I and/or HDL, while perturbations in mitochondrial function, or changes in the expression of mitochondrial fusion proteins, alter the efficiency of cholesterol efflux. Molecules which can sustain or improve mitochondrial function or increase the activity of the protein complex involved in cholesterol transfer may have utility in resolving the problem of dysregulated macrophage cholesterol homeostasis, a condition which may contribute to inflammation, atherosclerosis, nonalcoholic steatohepatitis, osteoblastic bone resorption, and some disorders of the central nervous system.
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Affiliation(s)
- Annette Graham
- Department of Life Sciences, School of Health and Life Sciences, and Institute for Applied Health Research, Glasgow Caledonian University, 70 Cowcaddens Road, Glasgow G4 0BA, United Kingdom.
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Hu B, Guo Y, Garbacz WG, Jiang M, Xu M, Huang H, Tsung A, Billiar TR, Ramakrishnan SK, Shah YM, Lam KSL, Huang M, Xie W. Fatty acid binding protein-4 (FABP4) is a hypoxia inducible gene that sensitizes mice to liver ischemia/reperfusion injury. J Hepatol 2015; 63:855-62. [PMID: 26070408 PMCID: PMC4867094 DOI: 10.1016/j.jhep.2015.05.030] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 04/28/2015] [Accepted: 05/21/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND & AIMS Fatty acid binding protein 4 (FABP4) has been known as a mediator of inflammatory response in the macrophages and adipose tissue, but its hepatic function is poorly understood. The goal of this study is to investigate the role of FABP4 in liver ischemia/reperfusion (I/R), a clinical condition that involves both hypoxia and inflammation. METHODS To examine the I/R regulation of FABP4, mice were subjected to I/R surgery before being measured for FABP4 gene expression. Both loss-of-function (by using a pharmacological FABP4 inhibitor) and gain-of-function (by adenoviral overexpression of FABP4) were used to determine the functional relevance of FABP4 expression and its regulation during I/R. To determine the hypoxia responsive regulation of FABP4, primary mouse hepatocytes were exposed to hypoxia. The FABP4 gene promoter was cloned and its regulation by hypoxia inducible factor 1α (HIF-1α) was characterized by luciferase reporter gene, electrophoretic mobility shift, and chromatin immunoprecipitation assays. RESULTS We found that the hepatic expression of FABP4 was markedly induced by I/R. At the functional level, pharmacological inhibition of FABP4 alleviated the I/R injury, whereas adenoviral overexpression of FABP4 sensitized mice to I/R injury. We also showed that exposure of primary hepatocytes to hypoxia or transgenic overexpression of HIF-1α in the mouse liver was sufficient to induce the expression of FABP4. Our promoter analysis established FABP4 as a novel transcriptional target of HIF-1α. CONCLUSIONS FABP4 is a hypoxia inducible gene that sensitizes mice to liver I/R injury. FABP4 may represent a novel therapeutic target, and FABP4 inhibitors may be used as therapeutic agents to manage hepatic I/R injury.
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Affiliation(s)
- Bingfang Hu
- Institute of Clinical Pharmacology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China; Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Yan Guo
- Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, USA; Department of Pathology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wojciech G Garbacz
- Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Mengxi Jiang
- Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Meishu Xu
- Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Hai Huang
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Allan Tsung
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Timothy R Billiar
- Department of Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Sadeesh K Ramakrishnan
- Department of Molecular & Integrative Physiology, Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Yatrik M Shah
- Department of Molecular & Integrative Physiology, Department of Internal Medicine, Division of Gastroenterology, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Karen S L Lam
- Department of Medicine, The University of Hong Kong, Hong Kong, China
| | - Min Huang
- Institute of Clinical Pharmacology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, China.
| | - Wen Xie
- Center for Pharmacogenetics and Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA, USA; Department of Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh, PA, USA.
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Nishiyama K, Nakashima H, Ikarashi M, Kinoshita M, Nakashima M, Aosasa S, Seki S, Yamamoto J. Mouse CD11b+Kupffer Cells Recruited from Bone Marrow Accelerate Liver Regeneration after Partial Hepatectomy. PLoS One 2015; 10:e0136774. [PMID: 26333171 DOI: 10.1371/journal.pone.0136774] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 08/08/2015] [Indexed: 01/11/2023] Open
Abstract
TNF and Fas/FasL are vital components, not only in hepatocyte injury, but are also required for hepatocyte regeneration. Liver F4/80+Kupffer cells are classified into two subsets; resident radio-resistant CD68+cells with phagocytic and bactericidal activity, and recruited radio-sensitive CD11b+cells with cytokine-producing capacity. The aim of this study was to investigate the role of these Kupffer cells in the liver regeneration after partial hepatectomy (PHx) in mice. The proportion of Kupffer cell subsets in the remnant liver was examined in C57BL/6 mice by flow cytometry after PHx. To examine the role of CD11b+Kupffer cells/Mφ, mice were depleted of these cells before PHx by non-lethal 5 Gy irradiation with or without bone marrow transplantation (BMT) or the injection of a CCR2 (MCP-1 receptor) antagonist, and liver regeneration was evaluated. Although the proportion of CD68+Kupffer cells did not significantly change after PHx, the proportion of CD11b+Kupffer cells/Mφ and their FasL expression was greatly increased at three days after PHx, when the hepatocytes vigorously proliferate. Serum TNF and MCP-1 levels peaked one day after PHx. Irradiation eliminated the CD11b+Kupffer cells/Mφ for approximately two weeks in the liver, while CD68+Kupffer cells, NK cells and NKT cells remained, and hepatocyte regeneration was retarded. However, BMT partially restored CD11b+Kupffer cells/Mφ and recovered the liver regeneration. Furthermore, CCR2 antagonist treatment decreased the CD11b+Kupffer cells/Mφ and significantly inhibited liver regeneration. The CD11b+Kupffer cells/Mφ recruited from bone marrow by the MCP-1 produced by CD68+Kupffer cells play a pivotal role in liver regeneration via the TNF/FasL/Fas pathway after PHx.
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Yu SJ, Bae S, Kang JS, Yoon JH, Cho EJ, Lee JH, Kim YJ, Lee WJ, Kim CY, Lee HS. Hepatoprotective effect of vitamin C on lithocholic acid-induced cholestatic liver injury in Gulo(−/−) mice. Eur J Pharmacol 2015; 762:247-55. [DOI: 10.1016/j.ejphar.2015.06.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Revised: 06/01/2015] [Accepted: 06/02/2015] [Indexed: 12/21/2022]
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Nishikawa K, Iwaya K, Kinoshita M, Fujiwara Y, Akao M, Sonoda M, Thiruppathi S, Suzuki T, Hiroi S, Seki S, Sakamoto T. Resveratrol increases CD68⁺ Kupffer cells colocalized with adipose differentiation-related protein and ameliorates high-fat-diet-induced fatty liver in mice. Mol Nutr Food Res 2015; 59:1155-70. [PMID: 25677089 DOI: 10.1002/mnfr.201400564] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 12/27/2014] [Accepted: 01/20/2015] [Indexed: 12/12/2022]
Abstract
SCOPE Resveratrol reportedly improves fatty liver. This study purposed to elucidate the effect of resveratrol on fatty liver in mice fed a high-fat (HF) diet, and to investigate the role of liver macrophages (Kupffer cells). METHODS AND RESULTS C57BL/6 mice were divided into three groups, receiving either a control diet, HF diet (50% fat), or HF supplemented with 0.2% resveratrol (HF + res) diet, for 8 weeks. Compared with the HF group, the HF + res group exhibited markedly attenuated fatty liver, and reduced lipid droplets (LDs) in hepatocytes. Proteomic analysis demonstrated that the most downregulated protein in the livers of the HF + res group was adipose differentiation-related protein (ADFP), which is a major constituent of LDs and reflects lipid accumulation in cells. The HF + res group exhibited greatly increased numbers of CD68(+) Kupffer cells with phagocytic activity. Immunohistochemistry showed that several CD68(+) Kupffer cells were colocalized with ADFP immunoreaction in the HF + res group. Additionally, the HF + res group demonstrated markedly decreased TNF-alpha production, which confirmed by both liver mononuclear cells stimulated by LPS in vitro and in situ hybridization analysis, compared with the HF group. CONCLUSION Resveratrol ameliorated fatty liver and increased CD68-positive Kupffer cells with downregulating ADFP expression.
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Affiliation(s)
| | - Keiichi Iwaya
- Department of Basic Pathology, National Defense Medical College, Saitama, Japan
| | - Manabu Kinoshita
- Department of Immunology and Microbiology, National Defense Medical College, Saitama, Japan
| | - Yoko Fujiwara
- Department of Food and Nutritional Sciences, Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Mai Akao
- Department of Food and Nutritional Sciences, Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Mariko Sonoda
- Department of Food and Nutritional Sciences, Graduate School of Humanities and Sciences, Ochanomizu University, Tokyo, Japan
| | - Suresh Thiruppathi
- Division of Molecular Target and Gene Therapy Products, National Institute of Health Sciences, Japan
| | - Takayoshi Suzuki
- Division of Molecular Target and Gene Therapy Products, National Institute of Health Sciences, Japan
| | - Sadayuki Hiroi
- Department of Laboratory Medicine, National Defense Medical College, Saitama, Japan
| | - Shuhji Seki
- Department of Immunology and Microbiology, National Defense Medical College, Saitama, Japan
| | - Toshihisa Sakamoto
- Department of Traumatology and Critical Care Medicine, National Defense Medical College, Saitama, Japan
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Enos RT, Velázquez KT, McClellan JL, Cranford TL, Walla MD, Murphy EA. Lowering the dietary omega-6: omega-3 does not hinder nonalcoholic fatty-liver disease development in a murine model. Nutr Res 2015; 35:449-59. [PMID: 25934114 DOI: 10.1016/j.nutres.2015.04.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 04/02/2015] [Accepted: 04/07/2015] [Indexed: 12/17/2022]
Abstract
It is hypothesized that a high dietary n-6:n-3 (eg, 10-20:1) is partly responsible for the rise in obesity and related health ailments. However, no tightly controlled studies using high-fat diets differing in the n-6:n-3 have tested this hypothesis. The aim of the study was to determine the role that the dietary n-6:n-3 plays in non-alcoholic fatty-liver disease (NAFLD) and colitis development. We hypothesized that reducing the dietary n-6:n-3 would hinder the development of NAFLD and colitis. Male C57BL/6 J mice were fed high-fat diets, differing in the n-6:n-3 (1:1, 5:1, 10:1, 20:1), for 20 weeks. Gas chromatography-mass spectrometry was used to analyze the hepatic phospholipid arachidonic acid (AA):eicosapentaenoic acid and AA:docosahexaenoic acid. Hepatic metabolism, inflammatory signaling, macrophage polarization, gene expression of inflammatory mediators, oxidative and endoplasmic reticulum stress, and oxidative capacity were assessed as well as colonic inflammatory signaling, and gene expression of inflammatory mediators and tight-junction proteins. Although reducing the dietary n-6:n-3 lowered the hepatic phospholipid AA:eicosapentaenoic acid and AA:docosahexaenoic acid in a dose-dependent manner and mildly influenced inflammatory signaling, it did not significantly attenuate NAFLD development. Furthermore, the onset of NAFLD was not paired to colitis development or changes in tight-junction protein gene expression. In conclusion, reducing the dietary n-6:n-3 did not attenuate NAFLD progression; nor is it likely that colitis, or gut permeability, plays a role in NAFLD initiation in this model.
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Affiliation(s)
- Reilly T Enos
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Kandy T Velázquez
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Jamie L McClellan
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Taryn L Cranford
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA
| | - Michael D Walla
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA
| | - E Angela Murphy
- Department of Pathology, Microbiology & Immunology, School of Medicine, University of South Carolina, Columbia, SC, 29209, USA.
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Tomar S, Nagarkatti M, Nagarkatti PS. 3,3'-Diindolylmethane attenuates LPS-mediated acute liver failure by regulating miRNAs to target IRAK4 and suppress Toll-like receptor signalling. Br J Pharmacol 2015; 172:2133-47. [PMID: 25521277 DOI: 10.1111/bph.13036] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/13/2014] [Accepted: 12/03/2014] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND AND PURPOSE Acute liver failure (ALF) is a severe and potentially lethal clinical syndrome. 3,3'-Diindolylmethane (DIM) is a natural plant-derived compound with anti-cancer activities. Recently, DIM has also been shown to have anti-inflammatory properties. Here, we tested the hypothesis that DIM would suppress endotoxin-induced ALF. EXPERIMENTAL APPROACH We investigated the therapeutic potential of DIM in a mouse model of D-galactosamine/Lipopolysaccharide (GalN/LPS)-induced ALF. The efficacy of DIM treatment was assessed by survival, liver histopathology, serum levels of alanine transaminase, pro-inflammatory cytokines and number of activated liver macrophages. Effects of DIM on the expression of two miRNAs, 106a and 20b, and their predicted target gene were measured by qRT-PCR and Western blotting. Effects of DIM on the release of TNF-α from RAW264.7 macrophages transfected with mimics of these miRNAs and activated by LPS was assessed by elisa. KEY RESULTS DIM treatment protected mice from ALF symptoms and reduced the number of activated liver macrophages. DIM increased expression of miR-106a and miR-20b in liver mononuclear cells and decreased expression of their predicted target gene IL-1 receptor-associated kinase 4 (IRAK4), involved in signalling from Toll-like receptor 4 (TLR4). In vitro transfection of RAW264.7 cells using miRNA mimics of miR-106a and 20b decreased expression of IRAK4 and of TNF-α secretion, following LPS stimulation. CONCLUSIONS AND IMPLICATIONS DIM attenuated GalN/LPS-induced ALF by regulating the expression of unique miRNAs that target key molecules in the TLR4 inflammatory pathway. DIM may represent a potential novel hepatoprotective agent.
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Affiliation(s)
- S Tomar
- Department of Pathology, Microbiology and Immunology, University of South Carolina School of Medicine, Columbia, SC, USA
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Krishnan TR, Velusamy P, Srinivasan A, Ganesan T, Mangaiah S, Narasimhan K, Chakrapani LN, J. T, Walter CEJ, Durairajan S, Nathakattur Saravanabavan S, Periandavan K. EGCG mediated downregulation of NF-AT and macrophage infiltration in experimental hepatic steatosis. Exp Gerontol 2014; 57:96-103. [DOI: 10.1016/j.exger.2014.05.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2013] [Revised: 05/03/2014] [Accepted: 05/08/2014] [Indexed: 10/25/2022]
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Sato A, Nakashima H, Nakashima M, Ikarashi M, Nishiyama K, Kinoshita M, Seki S. Involvement of the TNF and FasL produced by CD11b Kupffer cells/macrophages in CCl4-induced acute hepatic injury. PLoS One 2014; 9:e92515. [PMID: 24667392 DOI: 10.1371/journal.pone.0092515] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Accepted: 02/24/2014] [Indexed: 12/20/2022] Open
Abstract
We previously reported that F4/80+ Kupffer cells are subclassified into CD68+ Kupffer cells with phagocytic and ROS producing capacity, and CD11b+ Kupffer cells with cytokine-producing capacity. Carbon tetrachloride (CCl4)-induced hepatic injury is a well-known chemical-induced hepatocyte injury. In the present study, we investigated the immunological role of Kupffer cells/macrophages in CCl4-induced hepatitis in mice. The immunohistochemical analysis of the liver and the flow cytometry of the liver mononuclear cells showed that clodronate liposome (c-lipo) treatment greatly decreased the spindle-shaped F4/80+ or CD68+ cells, while the oval-shaped F4/80+ CD11b+ cells increased. Notably, severe hepatic injury induced by CCl4 was further aggravated by c-lipo-pretreatment. The population of CD11b+ Kupffer cells/macrophages dramatically increased 24 hour (h) after CCl4 administration, especially in c-lipo-pretreated mice. The CD11b+ Kupffer cells expressed intracellular TNF and surface Fas-ligand (FasL). Furthermore, anti-TNF Ab pretreatment (which decreased the FasL expression of CD11b+ Kupffer cells), anti-FasL Ab pretreatment or gld/gld mice attenuated the liver injury induced by CCl4. CD1d−/− mouse and cell depletion experiments showed that NKT cells and NK cells were not involved in the hepatic injury. The adoptive transfer and cytotoxic assay against primary cultured hepatocytes confirmed the role of CD11b+ Kupffer cells in CCl4-induced hepatitis. Interestingly, the serum MCP-1 level rapidly increased and peaked at six h after c-lipo pretreatment, suggesting that the MCP-1 produced by c-lipo-phagocytized CD68+ Kupffer cells may recruit CD11b+ macrophages from the periphery and bone marrow. The CD11b+ Kupffer cells producing TNF and FasL thus play a pivotal role in CCl4-induced acute hepatic injury.
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Tang T, Sui Y, Lian M, Li Z, Hua J. Pro-inflammatory activated Kupffer cells by lipids induce hepatic NKT cells deficiency through activation-induced cell death. PLoS One 2013; 8:e81949. [PMID: 24312613 PMCID: PMC3849421 DOI: 10.1371/journal.pone.0081949] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Accepted: 10/18/2013] [Indexed: 12/21/2022] Open
Abstract
Background Dietary lipids play an important role in the progression of non-alcoholic fatty liver disease (NAFLD) through alternation of liver innate immune response. Aims The present study was to investigate the effect of lipid on Kupffer cells phenotype and function invivo and invitro. And further to investigate the impact of lipid on ability of Kupffer cell lipid antigen presentation to activate NKT cells. Methods Wild type male C57BL/6 mice were fed either normal or high-fat diet. Hepatic steatosis, Kupffer cell abundance, NKT cell number and cytokine gene expression were evaluated. Antigen presentation assay was performed with Kupffer cells treated with certain fatty acids invitro and co-cultured with NKT cells. Results High-fat diet induced hepatosteatosis, significantly increased Kupffer cells and decreased hepatic NKT cells. Lipid treatment invivo or invitro induced increase of pro-inflammatory cytokines gene expression and toll-like receptor 4 (TLR4) expression in Kupffer cells. Kupffer cells expressed high levels of CD1d on cell surface and only presented exogenous lipid antigen to activate NKT cells. Ability of Kupffer cells to present antigen and activate NKT cells was enhanced after lipid treatment. In addition, pro-inflammatory activated Kupffer cells by lipid treatment induced hepatic NKT cells activation-induced apoptosis and necrosis. Conclusion High-fat diet increase Kupffer cells number and induce their pro-inflammatory status. Pro-inflammatory activated Kupfffer cells by lipid promote hepatic NKT cell over-activation and cell death, which lead to further hepatic NKT cell deficiency in the development of NAFLD.
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Affiliation(s)
- Tongfang Tang
- Division of Gastroenterology and Hepatology, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai ,P.R.China
| | - Yongheng Sui
- Division of Gastroenterology and Hepatology, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai ,P.R.China
| | - Min Lian
- Division of Gastroenterology and Hepatology, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai ,P.R.China
| | - Zhiping Li
- Department of Medicine, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Jing Hua
- Division of Gastroenterology and Hepatology, Ren Ji Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute of Digestive Disease, Shanghai ,P.R.China
- * E-mail:
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Peluso MEM, Munnia A, Tarocchi M, Arciello M, Balsano C, Giese RW, Galli A. Exocycilic DNA Adducts in a Murine Model of Non-alcoholic Steatohepatitis. ACTA ACUST UNITED AC 2013; 2013. [PMID: 31528500 PMCID: PMC6746424 DOI: 10.4172/2157-2518.s3-003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Introduction: Non-alcoholic fatty liver disease is the most common hepatic disorder in Western countries. The transition from abnormal accumulation of lipids toward non-alcoholic steatohepatitis (NASH) represents a key step in the development of chronic liver pathologies. Oxidative stress and lipid peroxidation have often been proposed as mechanisms in the progression to steatohepatitis. Methods: We have examined the hepatic levels of exocyclic DNA adducts, indicated from 3-(2-deoxy-β-D-erythro-pentafuranosyl)pyrimido[1,2-α]purin-10(3H)-one deoxyguanosine (M1dG) adduct, a biomarker of oxidative stress and lipid peroxidation, in a murine model of NASH using the 32P-DNA postlabeling assay. Results: Our findings show that C57BL/6 mice fed with high-fat and cholesterol diet developed signs associated with NASH after eight weeks, whereas there was no evidence of steatosis in control mice. The score for steatohepatitis ranged from grade 2 to 3 for steatosis, inflammation, and fibrosis, showing that the experimental diet was able to induce pathologic alterations of the parenchyma in eight weeks. Higher levels of M1dG adducts were detected in the livers of C57BL/6 mice which developed experimental NASH after eight weeks of high-fat and cholesterol feed, 5.6 M 1dG ± 0.4 (SE) per 106 total nucleotides, as compared to control mice, 1.6 M1dG ± 0.4 (SE). The statistical analysis showed that the increment of oxidatively damaged DNA in mice with NASH raised on high-fat and cholesterol diet was statistically significant as compared to control mice, P=0.006. Conclusions: Our report suggests a link between NASH and M1dG in experimental animals fed with a diet rich in saturated fats and cholesterol. High-fat and cholesterol may act together in inducing a broader spectrum of oxidatively damaged DNA, including exocyclic DNA adducts, that may contribute to the decline of hepatocyte functions, from disturbance of critical pathways, such as transcription and replication, triggering transient or permanent cell-cycle arrest and cell-death, up to chromosomal instability.
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Affiliation(s)
- Marco E M Peluso
- Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy
| | - Armelle Munnia
- Cancer Risk Factor Branch, Cancer Prevention and Research Institute, Florence, Italy
| | - Mirko Tarocchi
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Mario Arciello
- Department of Internal Medicine and Medical Specialties "Sapienza" University of Rome, Rome, Italy
| | - Clara Balsano
- CNR-IBPM Istituto di Biologia e Patologia Molecolare, Rome, Italy
| | - Roger W Giese
- Department of Pharmaceutical Sciences in the Bouve College of Health Sciences, Barnett Institute, Northeastern University, Boston, Massachusetts, USA
| | - Andrea Galli
- Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
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Ikarashi M, Nakashima H, Kinoshita M, Sato A, Nakashima M, Miyazaki H, Nishiyama K, Yamamoto J, Seki S. Distinct development and functions of resident and recruited liver Kupffer cells/macrophages. J Leukoc Biol 2013; 94:1325-36. [PMID: 23964119 DOI: 10.1189/jlb.0313144] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Although mouse liver F4/80(+) Kupffer cells consist of cytokine-producing CD11b(+) cells and phagocytic CD68(+) cells, an undefined CD11b(-) CD68(-) subset (30%) also exists. We herein demonstrate a more fundamental classification by adding CD32 (FcγRII), which covers most liver F4/80(+) cells and the distinct functions of them. Among the F4/80(+) cells, 50%, 40%, and 30% of cells were CD32(+), CD68(+), and CD11b(+), respectively, and one-half of the CD68(+) cells coexpressed CD32. CD68(+) and CD32(+) cells, but not CD11b(+) cells, expressed a phagocytosis-related CRIg. Gy (6) irradiation depleted liver CD11b(+) cells and those in the spleen, bone marrow, and peripheral blood but not liver CD32/CD68(+) cells. Transfer of bone marrow cells into the irradiated mice reconstituted liver CD11b(+) cells. Conversely, clodronate pretreatment depleted only liver CD32/CD68(+) cells but not liver CD11b(+) cells and peripheral blood or spleen CD11b(+) monocytes/macrophages. Moreover, the CD32(+) cells might be precursors of CD68(+) cells, as a large proportion of CD32(+) cells expressed the c-kit (CD117), and CD34 and CD32(+) cells acquired CD68 immediately after bacteria administration. CD32/CD68(+) cells, but not CD11b(+) cells, expressed resident macrophage-specific MerTK and CD64 (FcγRI). Challenge with Staphylococcus aureus or liver metastatic EL-4 tumor cells indicated that the CD68(+) subset is engaged in systemic bactericidal activity, whereas the CD11b(+) subset is pivotal for liver antitumor immunity. Human liver CD14(+) Kupffer cells could also be classified into three similar subsets. These results suggest that liver CD68(+) Kupffer cells and CD11b(+) Kupffer cells/macrophages are developmentally and functionally distinct subsets.
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Affiliation(s)
- Masami Ikarashi
- 1.National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama, 359-8513 Japan.
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Nunes de Carvalho S, Helal-Neto E, de Andrade DC, Costa Cortez EA, Thole AA, Barja-Fidalgo C, de Carvalho L. Bone marrow mononuclear cell transplantation increases metalloproteinase-9 and 13 and decreases tissue inhibitors of metalloproteinase-1 and 2 expression in the liver of cholestatic rats. Cells Tissues Organs 2013; 198:139-48. [PMID: 23886643 DOI: 10.1159/000353215] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/21/2013] [Indexed: 11/19/2022] Open
Abstract
Liver fibrosis results from chronic injury followed by activation of macrophages and fibrogenic cells like myofibroblasts and activated hepatic stellate cells. These fibrogenic cells express α-smooth muscle actin (α-SMA) and produce excessive extracellular matrix (ECM), with disorganization and loss of function of hepatic parenchyma. It is known that increased levels of metalloproteinases (MMPs) in liver fibrosis are associated with reduction of the pathologic ECM and fibrosis resolution. Recently, it has been shown that bone marrow mononuclear cells (BMMNCs) may reduce collagen and α-SMA expression, and ameliorate liver function in cholestatic rats. Therefore, this study aimed to analyze MMP-2, MMP-9 and MMP-13, and tissue inhibitors of MMPs (TIMPs)-1 and TIMP-2 in the liver of cholestatic rats transplanted with BMMNC. Animals were divided into normal rats, cholestatic rats obtained after 14 and 21 days of bile duct ligation (BDL), and rats obtained after 14 days of BDL that received BMMNCs and were killed after 7 days. MMP and TIMP expression was assessed by Western blotting, along with α-SMA, CD68 and CD11b expression by confocal microscopy. Western blotting analysis showed that 14-day BDL animals had significantly reduced amounts of MMP-2 and MMP-13, but increased amounts of MMP-9 compared to normal rats. After 21 days of BDL, overall MMP amounts were decreased and TIMPs were increased. BMMNC transplantation significantly increased MMP-9 and MMP-13, and decreased TIMP expression. Increased MMP activity was confirmed by zymography. MMP-9 and MMP-13 were expressed by macrophages near fibrotic septa, suggesting BMMNC may stimulate MMP production in fibrotic livers, contributing to ECM degradation and hepatic regeneration.
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Affiliation(s)
- Simone Nunes de Carvalho
- Laboratório Cultura de Células, Departamento de Histologia e Embriologia, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, UERJ, Rio de Janeiro, Brazil
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