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Ji W, Zhang Y, Qian X, Hu C, Huo Y. Palmatine alleviates inflammation and modulates ferroptosis against dextran sulfate sodium (DSS)-induced ulcerative colitis. Int Immunopharmacol 2024; 143:113396. [PMID: 39423661 DOI: 10.1016/j.intimp.2024.113396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 09/19/2024] [Accepted: 10/09/2024] [Indexed: 10/21/2024]
Abstract
UC, also known as ulcerative colitis, is an inflammatory bowel disease that is chronic and nonspecific. Palmatine (PAL), a natural alkaloid active ingredient, has demonstrated predominant protective effects on UC. In spite of this, PAL on UC is unclear in terms of its underlying mechanisms. Thus, this study aimed to investigate its effects and mechanism. By inducing rats with 5 % dextran sulfate sodium (DSS), an in vivo model of UC was developed. and then oral PAL administration. In vitro viability of NCM460 cells was measured using Cell Counting Kit-8. An enzyme-linked immunosorbent assay was used to determine the levels of inflammatory factores. The levels of oxidative stress parameters were also assessed, and the expression level of cyclooxygenase-2 (COX-2), acyl-CoA synthetase long-chain family member 4 (ACSL4), glutathione peroxidase 4 (GPX4), NF-E2-related factor 2(Nrf2), phospho-Nrf2, and heme oxygenase-1 (HO-1) was detected by Western blot. An iron kit was employed to measure iron content in cells and colonic tissues. Results indicated that PAL treatment significantly improved UC in rats, as shown by reduced disease activity index scores and increased colon length, which decreased IL-18, IL-1β, IL-6, TNF-α, MDA, NO, and LDH levels, but increased GSH level in DSS-induced rats and NCM460 cells. Further, PAL treatment markedly decreased COX-2, ACSL4, Nrf2, and HO-1 expression levels while increasing that of GPX4 and phospho-Nrf2. Furthermore, PAL inhibited the iron overload in the cells and colonic tissues. PAL may protect against UC by inhibiting the inflammatory response, oxidative stress, iron load, and suppressing ferroptosis pathway.
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Affiliation(s)
- Wanli Ji
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China.
| | - Yifan Zhang
- School of Pharmacy, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China.
| | - Xiaojing Qian
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Cheng Hu
- Science and Technology Experiment Center, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Yan Huo
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China.
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Fujii T, Yamawaki-Ogata A, Terazawa S, Narita Y, Mutsuga M. Administration of an antibody against apoptosis inhibitor of macrophage prevents aortic aneurysm progression in mice. Sci Rep 2024; 14:15878. [PMID: 38982113 PMCID: PMC11233551 DOI: 10.1038/s41598-024-66791-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Accepted: 07/03/2024] [Indexed: 07/11/2024] Open
Abstract
Apoptosis inhibitor of macrophage (AIM) is known to induce apoptosis resistance in macrophages and to exacerbate chronic inflammation, leading to arteriosclerosis. The role of AIM in aortic aneurysm (AA) remains unknown. This study examined the effects of an anti-AIM antibody in preventing AA formation and progression. In apolipoprotein E-deficient mice, AA was induced by subcutaneous angiotensin II infusion. Mice were randomly divided into two groups: (i) AIM group; weekly anti-murine AIM monoclonal antibody injection (n = 10), and (ii) IgG group; anti-murine IgG antibody injection as control (n = 14). The AIM group, compared with the IgG group, exhibited reduced AA enlargement (aortic diameter at 4 weeks: 2.1 vs. 2.7 mm, respectively, p = 0.012); decreased loss of elastic lamellae construction; reduced expression levels of IL-6, TNF-α, and MCP-1; decreased numbers of AIM-positive cells and inflammatory M1 macrophages (AIM: 1.4 vs. 8.0%, respectively, p = 0.004; M1 macrophages: 24.5 vs. 55.7%, respectively, p = 0.017); and higher expression of caspase-3 in the aortic wall (22.8 vs. 10.5%, respectively, p = 0.019). Our results suggest that administration of an anti-AIM antibody mitigated AA progression by alleviating inflammation and promoting M1 macrophage apoptosis.
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Affiliation(s)
- Taro Fujii
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumaicho Showa, Nagoya, Aichi, 466-8550, Japan
| | - Aika Yamawaki-Ogata
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumaicho Showa, Nagoya, Aichi, 466-8550, Japan
| | - Sachie Terazawa
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumaicho Showa, Nagoya, Aichi, 466-8550, Japan
| | - Yuji Narita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumaicho Showa, Nagoya, Aichi, 466-8550, Japan.
| | - Masato Mutsuga
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, 65 Tsurumaicho Showa, Nagoya, Aichi, 466-8550, Japan
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Apoptosis inhibitor of macrophage as a biomarker for disease activity in Japanese children with IgA nephropathy and Henoch-Schönlein purpura nephritis. Pediatr Res 2021; 89:667-672. [PMID: 32408340 DOI: 10.1038/s41390-020-0951-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 04/13/2020] [Accepted: 04/28/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND To evaluate the apoptosis inhibitor of macrophage (AIM) deposition patterns on the kidneys of children with IgA nephropathy (IgAN) and Henoch-Schönlein purpura nephritis (HSPN) and to investigate the clinical usefulness of serum and/or urinary AIM levels as biomarkers for the disease activity. METHODS Immunohistochemical study was performed in the kidneys of 37 patients with IgAN and 10 patients with HSPN. Serum and urinary AIM levels in the patients and 20 healthy controls (HCs) were quantified by enzyme-linked immunosorbent assay. The results were compared with clinical features. RESULTS In patients with IgAN and HSPN, AIM expression was observed in various areas, including the glomerular mesangial and capillary areas, the proximal and distal tubular epithelial cells, and on infiltrating macrophages in the glomeruli and interstitial areas. Serum and urinary AIM levels were significantly elevated in these patients compared with the HCs. Urinary AIM levels were positively correlated with the histological severity and degree of proteinuria and hematuria as well as urinary β2 microglobulin and urinary N-acetyl-β-D-glucosaminidase levels. CONCLUSIONS AIM plays an important role in the pathogenesis of IgAN and HSPN. Urinary AIM levels can potentially reflect active renal inflammation in these diseases and may represent a useful biomarker for disease activity. IMPACT Urinary AIM levels may represent a useful biomarker for disease activity of IgAN and HSPN. AIM expression was observed in the glomeruli, tubular epithelial cells, and infiltrating macrophages in glomeruli and interstitial area. U-AIM/Cr were significantly correlated not only with proteinuria, hematuria, and u-β2MG and u-NAG levels but also with the activity index of histological findings in kidney biopsy specimens. Our results can emphasize the important role of AIM in the pathogenesis of IgAN and HSPN.
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Gao X, Yan X, Yin Y, Lin X, Zhang Q, Xia Y, Cao J. Therapeutic Targeting of Apoptosis Inhibitor of Macrophage/CD5L in Sepsis. Am J Respir Cell Mol Biol 2019; 60:323-334. [PMID: 30326743 DOI: 10.1165/rcmb.2018-0272oc] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The factors involved in disturbing host homeostasis during sepsis are largely unknown. We sought to determine the immunopathological role of apoptosis inhibitor of macrophage (AIM)/CD5L in sepsis. Here, we show that blockade of AIM led to significantly increased survival after experimental sepsis, and it decreased local and systemic inflammation, reduced tissue injury, and inhibited bacterial dissemination in the blood, in particular at later time points. Supplementation of recombinant AIM in sepsis resulted in increased tissue injury, amplified inflammation, increased bacteremia, and worsened mortality. Interestingly, the most important difference in the production of cytokines and chemokines after in vivo AIM blockade or AIM administration during sepsis was IL-10. In vitro, AIM enhanced IL-10 production from macrophages, neutrophils, or lymphocytes. In vivo, the beneficial effects of AIM blockade and the detrimental effects of AIM addition on experimental sepsis were ablated by treatment with recombinant IL-10 and neutralizing anti-IL-10 antibodies, respectively. This study is the first to identify AIM as an important mediator in disturbing host homeostasis in sepsis.
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Affiliation(s)
- Xun Gao
- 1 Department of Laboratory Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.,2 Key Laboratory of Diagnostic Medicine designated by the Ministry of Education, Chongqing Medical University, Chongqing, China; and
| | - Xingxing Yan
- 1 Department of Laboratory Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yibing Yin
- 2 Key Laboratory of Diagnostic Medicine designated by the Ministry of Education, Chongqing Medical University, Chongqing, China; and
| | - Xue Lin
- 1 Department of Laboratory Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Qun Zhang
- 3 Clinical Laboratories Center, Affiliated Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Yun Xia
- 1 Department of Laboratory Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Ju Cao
- 1 Department of Laboratory Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Elevation of serum CD5L concentration is correlated with disease activity in patients with systemic lupus erythematosus. Int Immunopharmacol 2018; 63:311-316. [PMID: 30173083 DOI: 10.1016/j.intimp.2018.07.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 07/08/2018] [Accepted: 07/19/2018] [Indexed: 01/15/2023]
Abstract
Systemic lupus erythematosus (SLE) is characterized by an autoantibody- and immune complex-mediated inflammatory disease. Since CD5-like (CD5L), also known as apoptosis inhibitor of macrophage (AIM), is as an apoptosis inhibitor that protects the survival of macrophages, T cells, and NKT against proapoptotic agents, which plays an important role in the pathogenesis of various inflammatory diseases, we investigated the possible aberrant production of CD5L and its clinical implications in SLE patients. We measured the serum concentration and ex vivo production of CD5L in 68 SLE patients and 60 sex- and age- matched control individuals using an enzyme-linked immunoabsorbent assay. Serum CD5L concentrations were significantly higher in SLE patients than in healthy control subjects. Increase in CD5L concentration correlated positively and significantly with SLE Disease Activity Index (SLEDAI) score in all SLE patients. Besides, CD5L titers were positively correlated with anti-double stranded DNA antibody (anti-dsDNA) titers, ESR and C-reactive protein (CRP) levels, and negatively correlated with complement 3 (C3) and C4 levels. Serum CD5L concentrations could be significantly decreased after effective treatment of SLE. In addition, the ex vivo release of CD5L upon mitogen activation of peripheral blood mononuclear cells was significantly higher in the SLE groups than in the healthy control group. The above results suggest that the up-regulated production of CD5L is important in the immunopathogenesis of SLE, and may serve as a potential disease marker for the monitoring of SLE disease severity and therapeutic efficacy.
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Kimura H, Suzuki M, Konno S, Shindou H, Shimizu T, Nagase T, Miyazaki T, Nishimura M. Orchestrating Role of Apoptosis Inhibitor of Macrophage in the Resolution of Acute Lung Injury. THE JOURNAL OF IMMUNOLOGY 2017; 199:3870-3882. [PMID: 29070674 DOI: 10.4049/jimmunol.1601798] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 09/30/2017] [Indexed: 12/31/2022]
Abstract
Appropriate resolution of inflammation is known to be essential in tissue homeostasis. In this study, we evaluated the significance of a macrophage-derived soluble protein, apoptosis inhibitor of macrophage (AIM), in LPS-induced lung injury in mice. After oropharyngeal administration of LPS, the level of free-form serum AIM increased on days 2-4, accompanied by the resolution of inflammation, which was observed in the cellular profile of bronchoalveolar lavage fluid. In an experiment using wild-type (WT) and AIM-/- mice, the resolution of inflammation was accelerated in AIM-/- mice when compared with the WT mice, which was reversed when recombinant AIM protein was administered. The changes in the histopathological findings and inflammatory mediators followed similar trends, and the ratio of apoptotic cells was increased in AIM-/- mice when compared with the WT mice. In vitro analysis showed that macrophage phagocytosis of apoptotic neutrophils was suppressed in the presence of AIM, indicating that anti-resolution property of AIM involves efferocytosis inhibition. In lipidomic analysis of lung tissues, the levels of several lipid mediators increased markedly when LPS was given to WT mice. However, in AIM-/- mice, the concentrations of these lipid mediators were not significantly upregulated by LPS. These data reflect the significant role of AIM in lipid metabolism; it may suppress lipid metabolites at baseline, and then produce an inflammatory/pathologic pattern in the event of LPS-induced lung injury. Taken together, AIM may play an orchestrating role in the resolution process of inflammation by altering the profile of pulmonary lipid mediators in mice.
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Affiliation(s)
- Hiroki Kimura
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo 060-8638, Japan.,Department of Respiratory Medicine, Faculty of Medicine, The University of Tokyo, Tokyo 113-0033, Japan.,Agency for Medical Research and Development-Core Research for Evolutional Medical Science and Technology, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan
| | - Masaru Suzuki
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo 060-8638, Japan; .,Agency for Medical Research and Development-Core Research for Evolutional Medical Science and Technology, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan
| | - Satoshi Konno
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo 060-8638, Japan.,Agency for Medical Research and Development-Core Research for Evolutional Medical Science and Technology, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan
| | - Hideo Shindou
- Agency for Medical Research and Development-Core Research for Evolutional Medical Science and Technology, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan.,Department of Lipid Signaling, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan
| | - Takao Shimizu
- Department of Lipid Signaling, Research Institute, National Center for Global Health and Medicine, Tokyo 162-8655, Japan.,Department of Lipidomics, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan; and
| | - Takahide Nagase
- Department of Respiratory Medicine, Faculty of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - Toru Miyazaki
- Agency for Medical Research and Development-Core Research for Evolutional Medical Science and Technology, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan.,Laboratory of Molecular Biomedicine for Pathogenesis, Center for Disease Biology and Integrative Medicine, Faculty of Medicine, The University of Tokyo, Tokyo 113-8655, Japan
| | - Masaharu Nishimura
- First Department of Medicine, Hokkaido University School of Medicine, Sapporo 060-8638, Japan.,Agency for Medical Research and Development-Core Research for Evolutional Medical Science and Technology, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan
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Paclik D, Werner L, Guckelberger O, Wiedenmann B, Sturm A. Galectins distinctively regulate central monocyte and macrophage function. Cell Immunol 2011; 271:97-103. [PMID: 21724180 DOI: 10.1016/j.cellimm.2011.06.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2010] [Revised: 05/27/2011] [Accepted: 06/08/2011] [Indexed: 12/11/2022]
Abstract
Monocytes and macrophages link the innate and adaptive immune systems and protect the host from the outside world. In inflammatory disorders their activation leads to tissue damage. Galectins have emerged as central regulators of the immune system. However, if they regulate monocyte/macrophage physiology is still unknown. Binding of Gal-1, Gal-2, Gal-3 and Gal-4 to monocytes/macrophages, activation, cytokine secretion and apoptosis were determined by FACS, migration by Transwell system and phagocytosis by phagotest. Supernatants from macrophages co-cultured with galectins revealed their influence on T-cell function. In our study Gal-1, Gal-2, Gal-4, and partly Gal-3 bound to monocytes/macrophages. Galectins prevented Salmonella-induced MHCII upregulation. Cytokine release was distinctly induced by different galectins. T-cell activation was significantly restricted by supernatants of macrophages co-cultured in the presence of Gal-2 or Gal-4. Furthermore, all galectins tested significantly inhibited monocyte migration. Finally, we showed for the first time that galectins induce potently monocyte, but not macrophage apoptosis. Our study provides evidence that galectins distinctively modulate central monocyte/macrophage function. By inhibiting T-cell function via macrophage priming, we show that galectins link the innate and adaptive immune systems and provide new insights into the action of sugar-binding proteins.
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Affiliation(s)
- Daniela Paclik
- Department of Hepatology and Gastroenterology, Campus Virchow-Klinikum, Charité - Universitätsmedizin Berlin, Germany.
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