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Das D, Banerjee A, Mukherjee S, Maji BK. Quercetin inhibits NF-kB and JAK/STAT signaling via modulating TLR in thymocytes and splenocytes during MSG-induced immunotoxicity: an in vitro approach. Mol Biol Rep 2024; 51:277. [PMID: 38319443 DOI: 10.1007/s11033-024-09245-7] [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: 12/11/2023] [Accepted: 01/11/2024] [Indexed: 02/07/2024]
Abstract
BACKGROUND The most widely used food additive monosodium glutamate (MSG) has been linked to immunopathology. Conversely, quercetin (Q), a naturally occurring flavonoid has been demonstrated to have immunomodulatory functions. Therefore, the purpose of the study is to determine if quercetin can mitigate the deleterious effects of MSG on immune cells, and the possible involvement of TLR, if any. METHODS AND RESULTS: This study was conducted on Q, to determine how it affects the inflammatory response triggered by MSG in primary cultured thymocytes and splenocytes from rats (n = 5). Q shielded cells by augmenting cell survival and decreasing lactate dehydrogenase leakage during MSG treatment. It decreased IL-1β, IL-6, IL-8, and TNF-α expression and release by hindering NF-kB activation and by inhibiting the JAK/STAT pathway. Moreover, Q prevented NLRP3 activation, lowered IL-1β production, and promoted an anti-inflammatory response by increasing IL-10 production. Q reduced MSG-induced cellular stress and inflammation by acting as an agonist for PPAR-γ and LXRα, preventing NF-kB activation, and lowering MMP-9 production via increasing TIMP-1. Additionally, Q neutralized free radicals, elevated intracellular antioxidants, and impeded RIPK3, which is involved in inflammation induced by oxidative stress, TNF-α, and TLR agonists in MSG-treated cells. Furthermore, it also modulated TYK2 and the JAK/STAT pathway, which exhibited an anti-inflammatory effect. CONCLUSIONS MSG exposure is associated with immune cell dysfunction, inflammation, and oxidative stress, and Q modulates TLR to inhibit NF-kB and JAK/STAT pathways, providing therapeutic potential. Further research is warranted to understand Q's downstream effects and explore its potential clinical applications in inflammation.
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Affiliation(s)
- Debasmita Das
- Department of Physiology (UG & PG), Serampore College, 9 William Carey Road, Serampore, Hooghly, West Bengal, 712201, India
| | - Arnab Banerjee
- Department of Physiology (UG & PG), Serampore College, 9 William Carey Road, Serampore, Hooghly, West Bengal, 712201, India.
| | - Sandip Mukherjee
- Department of Physiology (UG & PG), Serampore College, 9 William Carey Road, Serampore, Hooghly, West Bengal, 712201, India
| | - Bithin Kumar Maji
- Department of Physiology (UG & PG), Serampore College, 9 William Carey Road, Serampore, Hooghly, West Bengal, 712201, India.
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Abstract
Loss of tolerance to self-antigens is considered to be one of the initial reasons for the onset of rheumatoid arthritis (RA). Identification of self-antigens and evaluation of autoreactive antibodies can foster understanding of the pathogenesis of the disease and the development of new therapeutics. By detection of responses to a particular self-antigen, such as α-enolase, keratin, fibrinogen, fibronectin, collagen, or vimentin, in patient- and animal model-derived samples, high-affinity T-cell receptor-dependent activation of autoreactive T cells to self-antigens can be elucidated. This chapter introduces a simple method to estimate T-cell-autoreactive responses to type II collagen (CII) in a murine collagen-induced arthritis model. A limiting dilution system is established in order to assess CII-dependent T-cell responses, which are reflected by the level of cytokine release.
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Affiliation(s)
- Shuang Liu
- Department of Pharmacology, Ehime University Graduate School of Medicine, Toon, Ehime, Japan.
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Dobutr T, Jangpromma N, Patramanon R, Daduang J, Klaynongsruang S, Poopornchai S, Yabe T, Daduang S. The effect of edible bird's nests on the expression of MHC-II and costimulatory molecules of C57BL/6 mouse splenocytes. Biochem Biophys Rep 2023; 35:101534. [PMID: 37671389 PMCID: PMC10475475 DOI: 10.1016/j.bbrep.2023.101534] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 08/11/2023] [Accepted: 08/18/2023] [Indexed: 09/07/2023] Open
Abstract
The glutinous nest that builds by the saliva secretion of swiftlet is recognizable as an edible bird's nest (EBN). It enriched a medicinal value and was regarded as supplementary food that exerts various beneficial health effects, especially immune boosters. This study's objective was to determine the impact of EBN on the expression of MHC-II and costimulatory molecules (CD86 and CD80) related to the initiation of T-cell activation. Both rEBN and pEBN samples were prepared with simulated gastrointestinal digestion for enhancing the bioaccessibility of bioactive compounds. Our result showed that digested EBN samples slightly influence the upregulation of MHC-II, CD86, and CD80 in gene expression of LPS-stimulated Raw 264.7 cells. The concern of endotoxin contamination in EBN samples, which may cause a false-positive result, was measured by quantitative PCR. We found that the inflammatory genes (IL-1β and TNF-α) were not induced by EBN treatments. Moreover, cell surface protein expression in splenocytes treated with EBN was assessed using flow cytometric analysis. Digested EBN samples demonstrated their capacity to promote the elevation of MHC-II, CD86, and CD80 cell surface protein expression. Finally, the digested-EBN-treated splenocytes only exhibited a specific response in the T-cells population. Thus, EBN is a source of the bioactive compound that has been proposed to exert a role in the stimulation of both MHC-II and costimulatory molecules for TCR/pMHC-II interaction leading to T-cell activation.
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Affiliation(s)
- Theerawat Dobutr
- Biomedical Sciences Program, Graduate School, Khon Kaen University, Khon Kaen, 40002, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
- Centre for Research and Development of Medical Diagnostic Laboratories (CMDL), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Nisachon Jangpromma
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Rina Patramanon
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Jureerut Daduang
- Centre for Research and Development of Medical Diagnostic Laboratories (CMDL), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Sompong Klaynongsruang
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
- Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
| | - Saowanee Poopornchai
- Aiko Edible Bird Nest Pattani, 44 M.3, T. Rhusamilae, Muang, Pattani, 94000, Thailand
| | - Tomio Yabe
- Department of Applied Life Science, Faculty of Applied Biological Sciences, Gifu University, Gifu, 501-1193, Japan
| | - Sakda Daduang
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand
- Division of Pharmacognosy and Toxicology, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen, 40002, Thailand
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Sugiyama Y, Ishida K, Yoshiyama Y, Tanaka S, Kawamata M. TRPV1 is involved in abdominal hyperalgesia in a mouse model of lipopolysaccharide-induced peritonitis and influences the immune response via peripheral noradrenergic neurons. Life Sci 2023; 317:121472. [PMID: 36750138 DOI: 10.1016/j.lfs.2023.121472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 01/12/2023] [Accepted: 01/30/2023] [Indexed: 02/07/2023]
Abstract
AIMS The transient receptor potential vanilloid subfamily 1 (TRPV1) not only plays a role as a nociceptor but also has some regulatory effects on the immune system. We investigated the effects of TRPV1 on abdominal pain and the immune system in lipopolysaccharide (LPS)-induced peritonitis and the association between TRPV1 and peripheral noradrenergic neurons. MAIN METHODS Experiments were performed in 8- to 14-week-old male wild-type (WT) and TRPV1 knockout (KO) mice. The mice were intraperitoneally injected with a non-lethal dose of LPS. Pain assessment and investigation of changes in the immune system were performed. Denervation of sympathetic nerves and the noradrenergic splenic nerve was induced by intraperitoneal administration of 6-hydroxydopamine. KEY FINDINGS The levels of serum cytokines were not significantly different in WT mice and TRPV1 KO mice. Abdominal mechanical hyperalgesia was greater in WT mice than in TRPV1 KO mice from 6 h to 3 days. The numbers of macrophages, neutrophils, dendritic cells, and CD4 T cells in the spleens of TRPV1 KO mice were significantly increased compared to those in WT mice 4 days after LPS administration. By noradrenergic denervation, the numbers of those cells in WT mice increased to levels comparable to those in TRPV1 KO mice. SIGNIFICANCE In LPS-induced peritonitis, abdominal inflammatory pain was transmitted via TRPV1. In addition, TRPV1 had an anti-inflammatory effect on the spleen in the late phase of peritonitis. This anti-inflammatory effect was thought to be mediated by activation of the sympathetic nervous system and/or noradrenergic splenic nerve induced by TRPV1 activation.
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Han NR, Kim KC, Kim JS, Ko SG, Park HJ, Moon PD. The immune-enhancing effects of a mixture of Astragalus membranaceus (Fisch.) Bunge, Angelica gigas Nakai, and Trichosanthes Kirilowii (Maxim.) or its active constituent nodakenin. J Ethnopharmacol 2022; 285:114893. [PMID: 34875347 DOI: 10.1016/j.jep.2021.114893] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/16/2021] [Accepted: 12/01/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE A mixture (SH003) of Astragalus membranaceus (Fisch.) Bunge, Angelica gigas Nakai, and Trichosanthes Kirilowii (Maxim.) has beneficial effects against several carcinomas. There have been few reports on an immune-enhancing activity of SH003 and its active constituent nodakenin. AIM OF THE STUDY This study aimed at identifying the immune-enhancing effect of SH003 and nodakenin. MATERIALS AND METHODS The immune-enhancing effect was evaluated using RAW264.7 macrophages, mouse primary splenocytes, and a cyclophosphamide (CP)-induced immunosuppression murine model. RESULTS The results show that SH003 or nodakenin stimulated the production levels of granulocyte colony-stimulating factor, IL-12, IL-2, IL-6, TNF-α, and nitric oxide (NO) and the expression levels of iNOS in RAW264.7 macrophages. SH003 or nodakenin also enhanced NF-κB p65 activation in RAW264.7 macrophages. SH003 or nodakenin stimulated the production levels of IFN-γ, IL-12, IL-2, TNF-α, and NO and the expression levels of iNOS in splenocytes. SH003 or nodakenin increased the splenic lymphocyte proliferation and splenic NK cell activity. In addition, SH003 or nodakenin increased the levels of IFN-γ, IL-12, IL-2, IL-6, and TNF-α in the serum and spleen of CP-treated mice, alleviating CP-induced immunosuppression. CONCLUSION Taken together, the results of this study show that SH003 improved immunosuppression through the activation of macrophages, splenocytes, and NK cells. These findings suggest that SH003 could be applied as a potential immunostimulatory agent for a variety of diseases caused or exacerbated by immunodeficiency.
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Affiliation(s)
- Na-Ra Han
- College of Korean Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea; Korean Medicine-Based Drug Repositioning Cancer Research Center, College of Korean Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea.
| | - Kyeoung-Cheol Kim
- Majors in Plant Resource and Environment, College of Agriculture & Life Sciences, SARI, Jeju National University, Jeju, 63243, Republic of Korea.
| | - Ju-Sung Kim
- Majors in Plant Resource and Environment, College of Agriculture & Life Sciences, SARI, Jeju National University, Jeju, 63243, Republic of Korea.
| | - Seong-Gyu Ko
- Korean Medicine-Based Drug Repositioning Cancer Research Center, College of Korean Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea; Department of Preventive Medicine, College of Korean Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea.
| | - Hi-Joon Park
- Department of Anatomy & Information Sciences, College of Korean Medicine, Kyung Hee University, Seoul, 02447, Republic of Korea.
| | - Phil-Dong Moon
- Center for Converging Humanities, Kyung Hee University, Seoul, 02447, Republic of Korea.
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Shin JE, Lee SJ, Gharbi A, Jung ID, Park YM. IOX1 impedes host inflammation in imiquimod-triggered psoriasis. Heliyon 2021; 7:e08433. [PMID: 34877426 DOI: 10.1016/j.heliyon.2021.e08433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 04/26/2021] [Revised: 07/16/2021] [Accepted: 11/16/2021] [Indexed: 02/07/2023] Open
Abstract
Psoriasis is a chronic autoimmune disease with an unknown etiology and highly limited treatment strategies. The drugs currently used in the treatment of psoriasis are rarely recommended for long-term use owing to the serious side effects. Although different targets have been identified for controlling psoriasis, the role of epigenetic modifications as therapeutic targets is yet to be elucidated. Here, we investigated the therapeutic potential of 8-hydroxyquinoline-5-carboxylic acid (IOX1), a novel drug with a genetic target, in psoriasis. The daily topical administration of IOX1 in a mouse model of imiquimod (IMQ)-induced psoriatic inflammation reduced inflammatory reactions in the skin and lowered the PASI score. Furthermore, intraperitoneally injected IOX1 repressed the inflammatory status induced by IMQ in psoriatic mice by reducing the mRNA levels of pro-inflammatory cytokines, restoring splenocyte populations, and regulating macrophage polarization. Our findings indicate the remedial effects of IOX1 on dermatitis psoriasis and the potential of IOX1 as a therapeutic compound in psoriasis.
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Prenek L, Litvai T, Balázs N, Kugyelka R, Boldizsár F, Najbauer J, Németh P, Berki T. Regulatory T cells are less sensitive to glucocorticoid hormone induced apoptosis than CD4 + T cells. Apoptosis 2021; 25:715-729. [PMID: 32737651 PMCID: PMC7527366 DOI: 10.1007/s10495-020-01629-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [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] [Indexed: 02/06/2023]
Abstract
Earlier we have reported that thymic regulatory T cells (Treg) are resistant to in vivo glucocorticoid hormone (GC)-induced apoptosis, while the most GC-sensitive DP thymocytes died through the activation of mitochondrial apoptotic pathway. Here we analyzed the apoptosis-inducing effect of high dose (10-6 M) in vitro dexamethasone (DX) treatment in mouse thymic- and splenic Tregs and CD4+ T cells. Activation of both extrinsic and intrinsic apoptotic pathways started after 2 h of DX treatment in CD4 SP thymocytes and was 3 × higher than in CD4+ splenocytes, while in Treg cells, weak activation of the extrinsic apoptotic pathway started only after 3 h. We also investigated the expression of 21 apoptosis-related molecules using a protein array and found higher level of both pro-and anti-apoptotic molecules in Tregs compared to CD4+ T cells. 4 h in vitro DX treatment induced upregulation of most apoptosis-related molecules both in Tregs and CD4+ T cells, except for the decrease of Bcl-2 expression in CD4+ T cells. We found high basal cytosolic Ca2+ levels in untreated Treg cells, which further increased after DX treatment, while the specific TCR-induced Ca2+ signal was lower in Tregs than in CD4+ T cells. Our results suggest that in the background of the relative apoptosis resistance of Treg cells to GCs might be their high basal cytosolic Ca2+ level and upregulated Bcl-2 expression. In contrast, downregulation of Bcl-2 expression in CD4+ T cells can explain their higher, DX-induced apoptosis sensitivity.
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Affiliation(s)
- Lilla Prenek
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Tímea Litvai
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Noémi Balázs
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Réka Kugyelka
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Ferenc Boldizsár
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - József Najbauer
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Péter Németh
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary
| | - Timea Berki
- Department of Immunology and Biotechnology, Clinical Center, Medical School, University of Pécs, Szigeti út 12, Pécs, 7624, Hungary.
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Marinescu CI, Preda MB, Burlacu A. A procedure for in vitro evaluation of the immunosuppressive effect of mouse mesenchymal stem cells on activated T cell proliferation. Stem Cell Res Ther 2021; 12:319. [PMID: 34090507 PMCID: PMC8178850 DOI: 10.1186/s13287-021-02344-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 09/04/2020] [Accepted: 04/19/2021] [Indexed: 02/08/2023] Open
Abstract
Background Mesenchymal stem/stromal cells (MSC) represent adult cells with multipotent capacity. Besides their capacity to differentiate into multiple lineages in vitro and in vivo, increasing evidence points towards the immunomodulatory capacity of these cells, as an important feature for their therapeutic power. Although not included in the minimal criteria established by the International Society for Cellular Therapy as a defining MSC attribute, demonstration of the immunomodulatory capacity of MSC can be useful for the characterization of these cells before being considered MSC. Methods Here we present a simple and reliable protocol by which the immunosuppressive effect of mouse bone marrow-derived MSC can be evaluated in vitro. It is based on the measuring of the proliferation of activated T cells cultured in direct contact with irradiated MSC. Results Our results showed that mouse MSC have a dose-dependent inhibitory effect on activated T cell proliferation, which can be quantified as a percentage of maximum proliferation. Our data shows that batch-to-batch variability can be determined within one or multiple experiments, by extracting the area under curve of T cell proliferation plotted against the absolute number of MSC in co-culture. Conclusions The validation of the immunosupressive capacity of MSC could be added to the characterization of the cells before being used in various MSC-based approaches to treat immunological diseases. Our results showed that mouse MSC have a dose-dependent inhibitory effect on activated T cell proliferation. The immunosuppressive properties of MSC vary between batches, but not between different passages of the same batch.
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Affiliation(s)
- Catalina-Iolanda Marinescu
- Laboratory of Stem Cell Biology, Institute of Cellular Biology and Pathology "Nicolae Simionescu", 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Mihai Bogdan Preda
- Laboratory of Stem Cell Biology, Institute of Cellular Biology and Pathology "Nicolae Simionescu", 8 B.P. Hasdeu Street, 050568, Bucharest, Romania
| | - Alexandrina Burlacu
- Laboratory of Stem Cell Biology, Institute of Cellular Biology and Pathology "Nicolae Simionescu", 8 B.P. Hasdeu Street, 050568, Bucharest, Romania.
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Lee H, Cho JA, Park E. Cell cycle profile data on splenocytes of high fat diet induced obese mice treated with ferulic acid. Data Brief 2020; 31:105990. [PMID: 32695857 PMCID: PMC7363655 DOI: 10.1016/j.dib.2020.105990] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/01/2020] [Accepted: 07/01/2020] [Indexed: 11/16/2022] Open
Abstract
The reported data are related to the article entitled "Ferulic acid maintains the self-renewal capacity of embryo stem cells and adipose-derived mesenchymal stem cells in high fat diet-induced obese mice" [1]. Ferulic acid is a natural bioactive compound and demonstrated potential to serve as a self-renewing biomarker in an alkaline phosphate assay and caused increased Nanog mRNA levels in embryonic stem cells. In these data, we examined another functional aspect of ferulic acid, namely the effect of ferulic acid on the cell cycle of splenocytes. These data were collected from the splenocytes of C57BL/6 J male mice that were fed either a high fat diet (HFD) alone or an HFD diet supplemented with ferulic acid (5 g/kg diet) for 8 weeks. As expected, the HFD resulted in a significant increase in mouse body weight, liver weight, and epididymal fat tissue weight compared to the control diet (Cho and Park, 2020). The cell cycle profile of mouse splenocytes in HFD-induced obese mice was evaluated by FACS. Since the G1 checkpoint is the point at which cells enter the cell cycle, an internal or external stimulation can cause the cell to delay passing G1 and instead enter a quiescent state known as G0 without proceeding past the restriction checkpoint. DNA damage is the main trigger that can cause a cell to "restrict" itself and not enter the cell cycle [2]. These results show that ferulic acid helps attenuate G1/S arrest in splenocytes in HFD-induced obese mice.
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Affiliation(s)
- Hyuna Lee
- Department of Food and Nutrition, Hannam University, 70, Hannam-ro, Daedeok-gu, Daejeon 306-791, Republic of Korea
| | - Jin Ah Cho
- Department of Food and Nutrition, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Eunmi Park
- Department of Food and Nutrition, Hannam University, 70, Hannam-ro, Daedeok-gu, Daejeon 306-791, Republic of Korea
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Mandil R, Prakash A, Rahal A, Singh SP, Sharma D, Kumar R, Garg SK. In vitro and in vivo effects of flubendiamide and copper on cyto-genotoxicity, oxidative stress and spleen histology of rats and its modulation by resveratrol, catechin, curcumin and α-tocopherol. BMC Pharmacol Toxicol 2020; 21:29. [PMID: 32326976 PMCID: PMC7179012 DOI: 10.1186/s40360-020-00405-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 09/29/2018] [Accepted: 03/20/2020] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND Living organisms are frequently exposed to more than one xenobiotic at a time either by ingestion of contaminated food/fodder or due to house-hold practices, occupational hazards or through environment. These xenobiotics interact individually or in combination with biological systems and act as carcinogen or produce other toxic effects including reproductive and degenerative diseases. Present study was aimed to investigate the cyto-genotoxic effects of flubendiamide and copper and ameliorative potential of certain natural phyotconstituent antioxidants. METHOD In vitro cytogenotoxic effects were evaluated by employing battery of assays including Propidium iodide staining, Tunel assay, Micronuclei, DNA fragmentation and Comet assay on isolated splenocytes and their prevention by resveratrol (5 and 10 μM), catechin (10 and 20 μM), curcumin (5 and 10 μM) and α-tocopherol (5, 10 and 20 μM). In vivo study was also undertaken daily oral administration of flubendiamide (200 mg/kg) or copper (33 mg/kg) and both these in combination, and also all these concurrently with of α-tocopherol to Wistar rats for 90 days. RESULTS Flubendiamide and copper produced concentration-dependent cytotoxic effects on splenocytes and at median lethal concentrations, flubendiamide (40 μM) and copper (40 μM) respectively produced 71 and 81% nonviable cells, higher number of Tunel+ve apoptotic cells, 7.86 and 9.16% micronucleus and 22.90 and 29.59 comets/100 cells and DNA fragmentation. In vivo study revealed significant (P < 0.05) increase in level of lipid peroxidation (LPO) and decrease in glutathione peroxidase (GPx), glutathione-S-transferase (GST) and superoxide dismutase (SOD) activities in groups exposed to flubendiamide or copper alone or both these in combination. Histopathological examination of rat spleens revealed depletion of lymphoid tissue, separation of splenocytes and rarification in splenic parenchyma of xenobiotic(s) treated groups. CONCLUSION Flubendiamide and copper induce oxidative stress and produce cytogenotoxic effects along with histoarchitectural changes in spleen. All four tested natural antioxidants (resveratrol, catechin, curcumin and α-tocopherol) reduced flubendiamide and copper-induced cytotoxic effects in rat splenocytes. Rat splenocytes are very sensitive to flubendiamide and copper-induced cytogenotoxicity, therefore, these can be effectively employed for screening of compounds for their cytogenotoxic potential. α-tocopherol was effective in restoring alterations in oxidative stress biomarkers and preventing histoarchitectural lesions in spleen.
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Affiliation(s)
- Rajesh Mandil
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary and Animal Sciences, Sardar Vallabhbhai Patel University of Agriculture and Tecahnology, 250110, Meerut, India
| | - Atul Prakash
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Science and Animal Husbandry, U.P. Pt. Deen Dayal Upadhyay Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go- Anusandhan Sansthan (DUVASU), -281001, Mathura, India
| | - Anu Rahal
- Division of Goat Health, Central Institute for Research on Goat (CIRG), Makhdoom, Farah, Mathura, Uttar Pradesh 281122 India
| | - S. P. Singh
- Department of Animal Genetics & Breeding, College of Veterinary Science and Animal Husbandry, U.P. Pt. Deen Dayal Upadhyay Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go-Anusandhan Sansthan (DUVASU), 281001, Mathura, India
| | - Deepak Sharma
- Department of Animal Genetics & Breeding, College of Veterinary Science and Animal Husbandry, U.P. Pt. Deen Dayal Upadhyay Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go-Anusandhan Sansthan (DUVASU), 281001, Mathura, India
| | - Rahul Kumar
- Department of Veterinary Pathology, College of Veterinary Science and Animal Husbandry, U.P. Pt. Deen Dayal Upadhyay Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go-Anusandhan Sansthan (DUVASU), 281001, Mathura, India
| | - Satish Kumar Garg
- Department of Veterinary Pharmacology and Toxicology, College of Veterinary Science and Animal Husbandry, U.P. Pt. Deen Dayal Upadhyay Pashu Chikitsa Vigyan Vishwavidyalaya Evam Go- Anusandhan Sansthan (DUVASU), -281001, Mathura, India
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Hoover DB, Poston MD, Brown S, Lawson SE, Bond CE, Downs AM, Williams DL, Ozment TR. Cholinergic leukocytes in sepsis and at the neuroimmune junction in the spleen. Int Immunopharmacol 2020; 81:106359. [PMID: 32143148 DOI: 10.1016/j.intimp.2020.106359] [Citation(s) in RCA: 7] [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: 01/17/2020] [Revised: 02/24/2020] [Accepted: 02/26/2020] [Indexed: 11/30/2022]
Abstract
The spleen is a key participant in the pathophysiology of sepsis and inflammatory disease. Many splenocytes exhibit a cholinergic phenotype, but our knowledge regarding their cholinergic biology and how they are affected by sepsis is incomplete. We evaluated effects of acute sepsis on the spleen using the cecal ligation and puncture (CLP) model in C57BL/6 and ChATBAC-eGFP mice. Quantification of cholinergic gene expression showed that choline acetyltransferase and vesicular acetylcholine transporter (VAChT) are present and that VAChT is upregulated in sepsis, suggesting increased capacity for release of acetylcholine (ACh). High affinity choline transporter is not expressed but organic acid transporters are, providing additional mechanisms for release. Flow cytometry studies identified subpopulations of cholinergic T and B cells as well as monocytes/macrophages. Neither abundance nor GFP intensity of cholinergic T cells changed in sepsis, suggesting that ACh synthetic capacity was not altered. Spleens have low acetylcholinesterase activity, and the enzyme is localized primarily in red pulp, characteristics expected to favor cholinergic signaling. For cellular studies, ACh was quantified by mass spectroscopy using d4-ACh internal standard. Isolated splenocytes from male mice contain more ACh than females, suggesting the potential for gender-dependent differences in cholinergic immune function. Isolated splenocytes exhibit basal ACh release, which can be increased by isoproterenol (4 and 24 h) or by T cell activation with antibodies to CD3 and CD28 (24 h). Collectively, these data support the concept that sepsis enhances cholinergic function in the spleen and that release of ACh can be triggered by stimuli via different mechanisms.
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Affiliation(s)
- Donald B Hoover
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA; Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, TN 37614, USA.
| | - Megan D Poston
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - Stacy Brown
- Department of Pharmaceutical Sciences, Gatton College of Pharmacy, East Tennessee State University, Johnson City, TN 37614, USA
| | - Sarah E Lawson
- Department of Pharmaceutical Sciences, Gatton College of Pharmacy, East Tennessee State University, Johnson City, TN 37614, USA
| | - Cherie E Bond
- Department of Biology, University of Florida, Gainesville, FL 32611, USA
| | - Anthony M Downs
- Department of Biomedical Sciences, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
| | - David L Williams
- Department of Surgery, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA; Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
| | - Tammy R Ozment
- Department of Surgery, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA; Center of Excellence in Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, TN 37614, USA
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Aboalsoud A, El-Ghaiesh SH, Abd Elmonem FF, Salem ML, Abdel Rahman MN. The effect of low-dose naltrexone on solid Ehrlich carcinoma in mice: The role of OGFr, BCL2, and immune response. Int Immunopharmacol 2020; 78:106068. [PMID: 31835085 DOI: 10.1016/j.intimp.2019.106068] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 11/11/2019] [Accepted: 11/19/2019] [Indexed: 02/07/2023]
Abstract
AIMS Cancer is a major worldwide health problem. Cancer cells express opioid growth factor (OGF) which controls their growth. Naltrexone in low dose (LDN) blocks opioid receptors intermittently and controls the replication of cancer cells. The aim of this study was to investigate the effect of LDN and its chemotherapeutic additive effect on the growth of solid Ehrlich carcinoma in mice with focus on the OGFr and immune responses. MAIN METHODS Sixty female Swiss albino mice were assigned into 5 groups (n: 12 mice each): (i): normal control, (ii): Solid Ehrlich carcinoma (SEC), (iii): SEC treated with LDN, (iv): SEC treated with 5-fluorouracil (5-FU), (v): SEC treated with LDN + 5-FU. All drugs were started when the tumor became palpable on 9th day. At the end of the study animals were sacrificed, blood and tissue samples were collected. Tumor weight and volume were measured. Splenocytes and myeloid derived suppressor cells (MDSC) were counted. Tumor expression of opioid growth factor receptors (OGFr), serum level of IFN-γ, tumor histopathology (H&E) and immunohistochemistry staining of p21, p53, Bcl2 were assessed. KEY FINDINGS All drug-treated groups showed reduction in tumor weight and volume, significant increase of splenocyte with tendency to reduce MDSC cell counts. LDN led to significant increase in OGFr both in solo and in combination with 5FU. Serum IFN-γ is significantly increased by LDN but decreased by 5-FU. Also, LDN and 5FU increased immunehistochemical staining of p21 while decreased immunostaining of Bcl2. In animals treated with a combination of LDN and 5FU a maximal downregulation of the antiapoptotic mediator BCL2 was observed. SIGNIFICANCE The current study suggested that LDN may play a role in inhibiting cancer cell growth and highlights the possibility of promising combination with cancer chemotherapeutics, which guarantee further clinical studies for approval.
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Affiliation(s)
- Alshimaa Aboalsoud
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Sabah H El-Ghaiesh
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt; Department of Pharmacology, Faculty of Medicine, University of Tabuk, Tabuk, Saudi Arabia.
| | - Fleur F Abd Elmonem
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Mohammed L Salem
- Department of Zoology, Faculty of Science, Tanta University, Tanta, Egypt
| | - Mohamed N Abdel Rahman
- Department of Pharmacology, Faculty of Medicine, Tanta University, Tanta, Egypt; Department of Clinical Pharmacology, Faculty of Medicine, Bisha University, Bisha, Saudi Arabia
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Adithan A, John Peter JS, Hossain MA, Kang CW, Kim B, Kim NS, Hwang KC, Kim JH. Biological effects of cyclosporin A on CD3 -CD161 + and CD3 +CD161 + lymphocytes. Mol Cell Biochem 2019; 458:159-169. [PMID: 31020492 DOI: 10.1007/s11010-019-03539-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 11/23/2018] [Accepted: 04/12/2019] [Indexed: 11/24/2022]
Abstract
Cyclosporin A (CSA) is a widely used drug to prevent the immune cell function. It is well known that CSA blocks transcription of cytokine genes in activated T cells. The connection between T cells and CSA has been well established. However, the effect of CSA on natural killer (NK) cells is not thoroughly understood. Therefore, in the present study, splenocytes and peripheral blood mononuclear cells (PBMCs) were treated with CSA in the presence of concanavalin A (Con A) or interleukin-2 (IL-2). CSA at higher concentrations induces apoptosis and inhibition of proliferation, while lower concentrations showed synergistically enhanced proliferation in splenocytes and PBMCs. Further, CSA favored the in vitro conversion of CD3+CD161+ cells. Splenocytes and PBMC were found to have synergistic proliferation with Con A, and PBMC exhibited significantly higher expression of NKp30, NKp44, and granzyme B along with enhanced cytotoxicity against K-562 cells in CSA-treated animals. Proliferation assay also showed that proliferation of CD161+ cells was higher in CSA-treated animals. Collectively, our results suggest that CSA differentially influences the population, function, and expression of the NK cell phenotype.
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Affiliation(s)
- Aravinthan Adithan
- College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Iksan, Jeollabuk-Do, Republic of Korea
| | - Judith Sharmila John Peter
- College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Iksan, Jeollabuk-Do, Republic of Korea
| | - Mohammad Amjad Hossain
- College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Iksan, Jeollabuk-Do, Republic of Korea
| | - Chang-Won Kang
- College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Iksan, Jeollabuk-Do, Republic of Korea
| | - Bumseok Kim
- College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Iksan, Jeollabuk-Do, Republic of Korea
| | - Nam Soo Kim
- College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Iksan, Jeollabuk-Do, Republic of Korea
| | - Ki-Chul Hwang
- Department of Medicine, College of Medicine, Catholic Kwandong University, Gangneung, Republic of Korea
| | - Jong-Hoon Kim
- College of Veterinary Medicine, Biosafety Research Institute, Chonbuk National University, Iksan, Jeollabuk-Do, Republic of Korea.
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Reyes-Becerril M, Angulo C, Sanchez V, Vázquez-Martínez J, López MG. Antioxidant, intestinal immune status and anti-inflammatory potential of Chenopodium ambrosioides L. in fish: In vitro and in vivo studies. Fish Shellfish Immunol 2019; 86:420-428. [PMID: 30502468 DOI: 10.1016/j.fsi.2018.11.059] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 10/10/2018] [Accepted: 11/27/2018] [Indexed: 06/09/2023]
Abstract
Chenopodium ambrosioides L. has been used for centuries as traditional medicine in many clinical situations. The objectives of this study were first to assess the nutraceutical potential of C. ambrosioides L. extract through analyses of its chemical composition and antioxidant properties, followed by assessing toxicity and antioxidative activities on fish splenocytes. The second one was to perform an in vivo study using dietary C. ambrosioides L. extract (0.0, 0.5, 1.0 and 2.0%; w/w) for 15 and 30 days (2-week and 4-week treatments) to assess associated-intestine health status by short-chain fatty production, antioxidant enzyme activities and anti-inflammatory effects on Pacific red snapper (Lutjanus peru). Non-polar and polar fractions were detected by gas chromatography/mass spectrometry (GC-MS) in C. ambrosioides, of which the most abundant compounds were carvacrol, phytol, squalene, vitamin E and sucrose. The extract of C. ambrosioides L. enhanced a considerable antiradical and reducing power; fish splenocytes responded positively with higher (88%) cell viability than control. The production of nitric oxide and superoxide anion, as well as superoxide dismutase and catalase activities, were also enhanced in splenocytes treated with C. ambrosioides L. The in vivo study results showed that acetate was the major short-chain fatty acid found in fish receiving C. ambrosioides L. after week four. Pro-inflammatory cytokine gene expression in intestine was modulated in fish fed with C. ambrosioides L. at any time of the experimental trial. In addition, the histological findings suggested that its extract did not cause inflammatory damage in intestine. Overall, the results suggest that C. ambrosioides L. is safe for immune cells and promoting intestinal health status of fish through antioxidant and anti-inflammatory effects, making it an interesting additive in functional diets.
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Affiliation(s)
- Martha Reyes-Becerril
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz B.C.S, 23096, Mexico.
| | - Carlos Angulo
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz B.C.S, 23096, Mexico
| | - Veronica Sanchez
- Immunology & Vaccinology Group. Centro de Investigaciones Biológicas del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz B.C.S, 23096, Mexico
| | - Juan Vázquez-Martínez
- Chemistry of Natural Products Laboratory, Biotechnology and Biochemistry Department, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Irapuato, Gto., Mexico
| | - Mercedes G López
- Chemistry of Natural Products Laboratory, Biotechnology and Biochemistry Department, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV-IPN), Irapuato, Gto., Mexico
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Pham TX, Lee Y, Bae M, Hu S, Kang H, Kim MB, Park YK, Lee JY. Spirulina supplementation in a mouse model of diet-induced liver fibrosis reduced the pro-inflammatory response of splenocytes. Br J Nutr 2019; 121:748-55. [PMID: 30806344 DOI: 10.1017/S0007114519000126] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Treatment of liver fibrosis is very limited as there is currently no effective anti-fibrotic therapy. Spirulina platensis (SP) is a blue-green alga that is widely supplemented in healthy foods. The objective of this study was to determine whether SP supplementation can prevent obesity-induced liver fibrosis in vivo. Male C57BL/6J mice were randomly assigned to a low-fat or a high-fat (HF)/high-sucrose/high-cholesterol diet or an HF diet supplemented with 2·5 % SP (w/w) (HF/SP) for 16 or 20 weeks. There were no significant differences in body weight, activity, energy expenditure, serum lipids or glucose tolerance between mice on HF and HF/SP diets. However, plasma alanine aminotransferase level was significantly reduced by SP at 16 weeks. Expression of fibrotic markers and trichrome stains showed no differences between HF and HF/SP. Splenocytes isolated from HF/SP fed mice had lower inflammatory gene expression and cytokine secretion compared with splenocytes from HF-fed mice. SP supplementation did not attenuate HF-induced liver fibrosis. However, the expression and secretion of inflammatory genes in splenocytes were significantly reduced by SP supplementation, demonstrating the anti-inflammatory effects of SP in vivo. Although SP did not show appreciable effect on the prevention of liver fibrosis in this mouse model, it may be beneficial for other inflammatory conditions.
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Yang EJ, Song IS, Song KS. Ethanol extract of Glycyrrhizae Radix modulates the responses of antigen-specific splenocytes in experimental autoimmune encephalomyelitis. Phytomedicine 2019; 54:56-65. [PMID: 30668383 DOI: 10.1016/j.phymed.2018.09.189] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Revised: 08/22/2018] [Accepted: 09/17/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Multiple sclerosis (MS) is an autoimmune disorder resulting in paralysis, and the responses of reactive T cells against self-antigens are hallmarks. Glycyrrhizae Radix (GR) has been used for detoxification and reducing inflammation. However, very few reports have described the effects of GR on MS. PURPOSE The immunomodulatory effects of GR extract on autoimmune responses were evaluated through in vitro, ex vivo, and in vivo assays using primary mouse splenocytes (SPLC), mouse microglia BV2 cell line, and a mouse model of experimental autoimmune encephalomyelitis (EAE). STUDY DESIGN Ethanol extract of GR was used in vitro with primary SPLC in the condition of anti-CD3/CD28 stimulation and interferon (IFN)-γ-producing CD4+ (TH1)/CD8+ (TC1) polarization as well as IFN-γ-stimulated BV2 cells. For EAE induction, female C57BL/6 mice were immunized with 200 μg of myelin oligodendrocyte glycoprotein (MOG)35-55 without pertussis toxin. EAE SPLC (ex vivo) and EAE mice (in vivo) were treated with GR extract to evaluate the changes in antigen-specific responses. SPLC media containing antigen-specific responses were used to stimulate BV2 cells. RESULTS GR extract effectively modulated the responses of reactive splenic T cells through the reduction in IFN-γ+ T cell populations, the expressions of cell adhesion molecules (CAMs), and secretions of cytokines containing IFN-γ and a chemokine IFN-γ-induced protein 10 (IP-10) in vitro. In addition, GR extract significantly decreased nitric oxide production and secretion of tumor necrosis factor (TNF)-α and IP-10 in IFN-γ-stimulated BV2 cells. The antigen-specific TH1 and TC1 populations were decreased following administration of 100 mg/kg of GR extract, whereas CD8+IL-17A+ (TC17) population was increased on day 36 after EAE induction. Moreover, IFN-γ, which showed the highest secretion among examined cytokines, and IP-10 decreased on day 36. SPLC media derived from 100 mg/kg GR extract-administered EAE mice revealed the ameliorative effects on BV2 cell stimulation. CONCLUSION This is the first report on the immunomodulatory effects of GR extract on antigen-specific SPLC responses in EAE. These results could be helpful for the discovery of drug candidates for MS by focusing on IFN-γ-related autoimmune responses.
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Affiliation(s)
- Eun-Ju Yang
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, 80 Daehak-ro, Daegu, 41566, Republic of Korea.
| | - Im-Sook Song
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, 80 Daehak-ro, Daegu, 41566, Republic of Korea
| | - Kyung-Sik Song
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Kyungpook National University, 80 Daehak-ro, Daegu, 41566, Republic of Korea.
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Du J, Ding X, Zhang X, Zhao X, Shan H, Wang F. Berberine attenuate staphylococcal enterotoxin B-mediated acute liver injury via regulating HDAC expression. AMB Express 2018; 8:158. [PMID: 30276552 PMCID: PMC6167266 DOI: 10.1186/s13568-018-0684-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 06/06/2018] [Accepted: 09/24/2018] [Indexed: 01/16/2023] Open
Abstract
Staphylococcal enterotoxin B (SEB) has been documented to be implicated in the pathogenesis of liver injury in the experimental models of hepatitis. However, the underlying mechanism of SEB-induced acute liver injury (ALI) remains to be further explored. In our study, we explored the therapeutic effectiveness of berberine (BBR), a natural isoquinoline alkaloid, in the SEB-induced ALI. In our study, we found that injection of SEB into d-galactosamine (d-gal)-sensitized mice induced ALI, as demonstrated by an increase of levels of alanine aminotransferase and aspartate aminotransferase, massive infiltration of immune cells into the liver, and pro-inflammatory cytokine release. However, intragastric administration of BBR attenuated SEB-induced ALI in mice. Meanwhile, we discovered that BBR treatment suppressed activation of splenocytes and pro-inflammatory cytokine release in SEB-stimulated splenocytes. Moreover, mechanistic analyses demonstrated that BBR was effective at inhibiting the expression of class I HDAC, but not class II, in SEB-stimulated splenocytes. Furthermore, trichostatin A, a standard HDAC inhibitor, alleviated activation of splenocytes and pro-inflammatory cytokine release in SEB-stimulated splenocytes. Taken together, we inferred from these results that BBR attenuated SEB-mediated ALI through repressing the class I HDAC enzyme, suggesting that BBR may constitute a novel therapeutic modality to prevent SEB-mediated inflammation and ALI.
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Abstract
Loss of tolerance to self-antigens is considered to be one of the initial reasons for the onset of rheumatoid arthritis (RA). Identification of self-antigens and evaluation of autoreactive antibodies can foster understanding of the pathogenesis of the disease and the development of new therapeutics. By detection of responses to a particular self-antigen, such as α-enolase, keratin, fibrinogen, fibronectin, collagen, or vimentin, in patient- and animal model-derived samples, high-affinity T-cell receptor-dependent activation of autoreactive T cells to self-antigens can be elucidated. This chapter introduces a simple method to estimate T-cell autoreactive responses to CII in a murine CIA model. A limiting dilution system is established in order to assess CII-dependent T-cell responses, which are reflected by the level of cytokine release.
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Mandal P, Tewari P, Kumar S, Yadav S, Ayanur A, Chaturvedi RK, Das M, Tripathi A. Argemone oil, an edible oil adulterant, induces systemic immunosuppression in Balb/c mice in an oral 28 days repeated dose toxicity study. Chem Biol Interact 2018; 287:57-69. [PMID: 29655912 DOI: 10.1016/j.cbi.2018.04.013] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 04/04/2018] [Accepted: 04/12/2018] [Indexed: 10/17/2022]
Abstract
Consumption of edible oils contaminated with Argemone oil (AO) leads to a clinical condition called "Epidemic dropsy". Earlier studies have reported that metabolism and oxidative stress primarily contributes to AO toxicity, however, the involvement of immune system has not been assessed so far. Therefore, the present study was undertaken to systematically assess the effect of AO exposure on the function of immune system in Balb/c mice. The repeated exposure of AO for 28 days caused prominent regression of spleen and thymus; severe inflammatory changes in spleen depicted by the loss of distinct follicles, increased megakaryocyte infiltration, and enhanced expression levels of inflammatory markers (iNOS & COX-2). At the functional level, AO exposure significantly abrogated the mixed lymphocyte reaction and mitogen-stimulated lymphoproliferative activity of T and B cells, which is reflective of profound lymphocyte dysfunction upon antigen exposure. In concordance with the loss in functional activity of lymphocytes in AO exposed animals, it was found the AO altered the relative percentage of CD3+, CD4+, and CD28 + T cells. Further, there was a marked decrease in the relative distribution of cells with prominent MHC I and CD1d expression in AO exposed splenocytes. Moreover, reduced levels of immune stimulatory cytokines (TNF-α, IFN-γ, IL-2, IL-4, and IL-6), and increased levels of immunosuppressive cytokine IL-10 were detected in the serum of AO treated mice. Along with T and B cells, AO exposure also affected the phenotype and activation status of macrophages suggesting the inclination towards "alternative activation of macrophages". Altogether, these functional changes in the immune cells are contributing factors in AO induced immunosuppression.
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Affiliation(s)
- Payal Mandal
- Food, Drugs and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research, India; Academy of Scientific and Innovative Research (AcSIR) CSIR-IITR Campus, Lucknow, India
| | - Prachi Tewari
- Food, Drugs and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research, India; Academy of Scientific and Innovative Research (AcSIR) CSIR-IITR Campus, Lucknow, India
| | - Sachin Kumar
- Food, Drugs and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research, India; Academy of Scientific and Innovative Research (AcSIR) CSIR-IITR Campus, Lucknow, India
| | - Sarika Yadav
- Food, Drugs and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research, India; Academy of Scientific and Innovative Research (AcSIR) CSIR-IITR Campus, Lucknow, India
| | - Anjaneya Ayanur
- Central Pathology Laboratory, CSIR- Indian Institute of Toxicology Research, India
| | - Rajnish K Chaturvedi
- Academy of Scientific and Innovative Research (AcSIR) CSIR-IITR Campus, Lucknow, India; Systems Toxicology & Health Risk Assessment, CSIR- Indian Institute of Toxicology Research, India
| | - Mukul Das
- Food, Drugs and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research, India; Academy of Scientific and Innovative Research (AcSIR) CSIR-IITR Campus, Lucknow, India.
| | - Anurag Tripathi
- Food, Drugs and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research, India; Academy of Scientific and Innovative Research (AcSIR) CSIR-IITR Campus, Lucknow, India.
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Chander S, Ashok P, Reguera RM, Perez-Pertejo MY, Carbajo-Andres R, Balana-Fouce R, Gowri Chandra Sekhar KV, Sankaranarayanan M. Synthesis and activity of benzopiperidine, benzopyridine and phenyl piperazine based compounds against Leishmania infantum. Exp Parasitol 2018; 189:49-60. [PMID: 29702355 DOI: 10.1016/j.exppara.2018.04.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 02/07/2018] [Revised: 03/25/2018] [Accepted: 04/15/2018] [Indexed: 10/17/2022]
Abstract
In the present study, anti-leishmanial evaluation of twenty four structurally diverse compounds based on benzopiperidine, benzopyridine and phenylpiperazine nucleuses against Leishmania infantum has been reported. Cytotoxicity studies of all the compounds were performed on murine non-infected splenocytes. Tested compounds exhibited weak to potent activity against promastigote (IC50 3.21 ± 1.40 to >100 μM) as well as amastigote (IC50 6.84 ± 2.5 to 92.47 ± 17.61 μM) forms of tested strains. Moreover, two compounds F13 and F15 exhibited potent activity (IC50 < 10 μM) against both forms of the parasite with selectivity index ranges from 11.40 to 22.10. Overall, the current study afforded few hits with novel anti-leishmanial activity in low micromolar concentration, further hit optimization studies can be performed to get more potent candidates against the selected species of parasite.
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Affiliation(s)
- Subhash Chander
- Medicinal Chemistry Research Laboratory, Department of Pharmacy, Birla Institute of Technology & Science-Pilani, Pilani Campus, Pilani, 333031, Rajasthan, India; School of Pharmacy, Maharaja Agrasen University, Baddi, 174103, Solan, Himachal Pradesh, India.
| | - Penta Ashok
- Medicinal Chemistry Research Laboratory, Department of Pharmacy, Birla Institute of Technology & Science-Pilani, Pilani Campus, Pilani, 333031, Rajasthan, India
| | - Rosa M Reguera
- Departmento de Ciencias Biomedicas, Facultad de Veterinaria, Universidad de Leon, Leon, 24071, Spain
| | - M Yolanda Perez-Pertejo
- Departmento de Ciencias Biomedicas, Facultad de Veterinaria, Universidad de Leon, Leon, 24071, Spain
| | - Ruben Carbajo-Andres
- Departmento de Ciencias Biomedicas, Facultad de Veterinaria, Universidad de Leon, Leon, 24071, Spain
| | - Rafael Balana-Fouce
- Departmento de Ciencias Biomedicas, Facultad de Veterinaria, Universidad de Leon, Leon, 24071, Spain
| | - Kondapalli Venkata Gowri Chandra Sekhar
- Department of Chemistry, Birla Institute of Technology and Science-Pilani, Hyderabad Campus, Jawahar Nagar, Shameerpet Mandal, R.R. Dist, Hyderabad, 500078, Telangana, India
| | - Murugesan Sankaranarayanan
- Medicinal Chemistry Research Laboratory, Department of Pharmacy, Birla Institute of Technology & Science-Pilani, Pilani Campus, Pilani, 333031, Rajasthan, India.
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Hsiao YP, Shen CC, Huang CH, Lin YC, Jan TR. Iron oxide nanoparticles attenuate T helper 17 cell responses in vitro and in vivo. Int Immunopharmacol 2018; 58:32-39. [PMID: 29549717 DOI: 10.1016/j.intimp.2018.03.007] [Citation(s) in RCA: 14] [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: 10/21/2017] [Revised: 02/15/2018] [Accepted: 03/07/2018] [Indexed: 12/27/2022]
Abstract
Iron oxide nanoparticles (IONPs) have been shown to attenuate T helper (Th)1 and Th2 cell-mediated immunity in ovalbumin (OVA)-sensitized mice. The objective of this study is to investigate the effects of IONPs on the immune responses of Th17 cells, a subset of T cells involved in various inflammatory pathologies. For in vivo study, a murine model of delayed-type hypersensitivity (DTH) was employed. BALB/c mice received a single dose of IONPs (0.2-10 mg iron/kg) via the tail vein 1 h prior to ovalbumin (OVA) sensitization. Their footpads were subcutaneously challenged with OVA to induce DTH reactions. The expression of Th17 cell-related molecules in inflamed footpads were examined by immunohistochemistry. For in vitro study, OVA-primed splenocytes were directly exposed to IONPs (1-100 μg iron/mL), and then re-stimulated with OVA in culture. The expression of Th17 cell-related molecules were measured by reverse transcription-polymerase chain reaction and enzyme-linked immunosorbent assay. IONP administration attenuated the number of interleukin (IL)-6, IL-17, the transcription factor ROR-γ, and chemokine receptor 6 positive cells in OVA-challenged footpads, whereas the number of transforming growth factor-β, IL-23 and chemokine (C-C motif) ligand 20 positive cells was not altered. Direct exposure of OVA-primed splenocytes to IONPs suppressed the production of IL-6 and IL-17, and the mRNA expression of IL-17 and ROR-γt. These data indicate that exposure to IONPs attenuates Th17 cell responses in vivo and in vitro.
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Affiliation(s)
- Yai-Ping Hsiao
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
| | - Chien-Chang Shen
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
| | - Chung-Hsiung Huang
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan; National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Miaoli, Taiwan
| | - Yu-Chin Lin
- Department of Medicinal Botanicals and Health Applications, College of Biotechnology & Bioresources, Da-Yeh University, No.168, University Rd., Dacun, Changhua, Taiwan.
| | - Tong-Rong Jan
- Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan.
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Dellschaft NS, Richard C, Lewis ED, Goruk S, Jacobs RL, Curtis JM, Field CJ. The dietary form of choline during lactation affects maternal immune function in rats. Eur J Nutr 2017; 57:2189-2199. [PMID: 28667457 DOI: 10.1007/s00394-017-1493-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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: 05/03/2017] [Accepted: 06/25/2017] [Indexed: 12/11/2022]
Abstract
PURPOSE The present study was designed to determine the effects of both choline form and availability on maternal immune function during lactation. METHODS Sprague-Dawley rats were randomized to one of the three diets 24-48 h before parturition and fed ad libitum until 21 days postnatal: 1 g/kg choline as free choline (C, n = 11), the current form, and amount of choline in commercial diets; 1 g/kg choline as phosphatidylcholine (PC1, n = 11); or 2.5 g/kg choline as PC (PC2.5, n = 8). Choline metabolites in offspring stomach contents were quantified. At 21 days, lymphocytes from mothers' mesenteric lymph nodes and spleens were isolated and phenotypes and ex vivo cytokine production after mitogen exposure were determined. RESULTS There was a higher proportion of choline and a lower proportion of lyso-PC in stomach contents (representing dam's milk) of C pups compared to PC1. In the mesenteric lymph nodes, feeding PC1 compared to C led to a higher IL-2 production after Concanavalin A (ConA) stimulation and a higher proportion of T cells (CD3+) and a lower proportion of B cells [immunoglobulin (Ig)κ, CD45RA+, and IgM+; P < 0.05]. Splenocytes from the PC1 group produced more IL-6 and TNF-α after lipopolysaccharides stimulation compared to C (P < 0.05). Splenocytes from the PC2.5 group produced more IL-2 and IL-6 after ConA stimulation compared to PC1 (P < 0.05). CONCLUSIONS Feeding choline as PC in the maternal diet improved the ability of immune cells to respond ex vivo to mitogens and increasing the amount of PC in the diet further improved T cell proliferation.
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Affiliation(s)
- N S Dellschaft
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-126A Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
- Early Life Research Unit, Academic Division of Child Health, Obstetrics and Gynaecology, School of Medicine, Queen's Medical Centre, University of Nottingham, Nottingham, NG7 2UH, UK
| | - C Richard
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-126A Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
| | - E D Lewis
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-126A Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
| | - S Goruk
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-126A Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
| | - R L Jacobs
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-126A Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
| | - J M Curtis
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-126A Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada
| | - C J Field
- Department of Agricultural, Food and Nutritional Science, University of Alberta, 4-126A Li Ka Shing Centre for Health Research Innovation, Edmonton, AB, T6G 2E1, Canada.
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Shruthi RR, Venkatesh YP, Muralikrishna G. Structural and functional characterization of a novel immunomodulatory glycoprotein isolated from ajowan (Trachyspermum ammi L.). Glycoconj J 2017; 34:499-514. [PMID: 28493026 DOI: 10.1007/s10719-017-9771-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 12/07/2016] [Revised: 04/12/2017] [Accepted: 04/19/2017] [Indexed: 12/28/2022]
Abstract
Ajowan (Trachyspermum ammi L.) spice has been used in food preparations and also as a traditional medicine in Ayurveda. Although a number of pharmacological activities have been attributed to ajowan, its role in immunomodulation is not known. The main objective of the present study is to examine the macromolecular immunomodulatory components. Macrophage activation was studied by nitric oxide (NO) release, phagocytosis and secretion of pro-inflammatory cytokines as the markers. Ethanol precipitate (fractional) of ajowan aqueous extract was subjected to conventional chromatography (Q Sepharose followed by Bio-Gel P-100). One of the proteins (30.7 kDa; ajowan glycoprotein or Agp) showed effective mitogenic activity towards splenocytes. Agp is a O-linked glycoprotein with the glycans contributing to one-third of the molecular mass. It has a high content of glutamic acid, serine, aspartic acid and proline whereas galactose (45.7%), arabinose (34.5%), glucose (7%), mannose (5%) and xylose (4%) are the constituent sugars. Secondary structure analysis indicated that Agp contains 79% α-helices and 21% random coil. Internal sequencing of the tryptic peptides did not show homology with the existing proteins in the database (BLAST). Agp at 1 μg/mL induced proliferation of B-cell enriched murine splenocytes and activated macrophages in releasing NO and promoted phagocytosis (p < 0.01). RAW 264.7 cells produced pro-inflammatory cytokines (IL-12, TNF-α and IFN-γ) at 1 μg/mL Agp (p < 0.01). Deproteinized Agp (dpAgp) failed to elicit activation of murine immune cells, whereas deglycosylated Agp (20 kDa; dgAgp) showed compromised efficiency. This is the first report of an immunomodulatory protein from ajowan.
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Affiliation(s)
- R R Shruthi
- Department of Biochemistry, CSIR-Central Food Technological Research Institute (CFTRI), KRS Road, Mysore, Karnataka, 570020, India
| | - Y P Venkatesh
- Department of Biochemistry, CSIR-Central Food Technological Research Institute (CFTRI), KRS Road, Mysore, Karnataka, 570020, India
| | - G Muralikrishna
- Department of Biochemistry, CSIR-Central Food Technological Research Institute (CFTRI), KRS Road, Mysore, Karnataka, 570020, India.
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24
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Syama S, Paul W, Sabareeswaran A, Mohanan PV. Raman spectroscopy for the detection of organ distribution and clearance of PEGylated reduced graphene oxide and biological consequences. Biomaterials 2017; 131:121-30. [PMID: 28388498 DOI: 10.1016/j.biomaterials.2017.03.043] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 03/12/2017] [Accepted: 03/25/2017] [Indexed: 01/12/2023]
Abstract
Graphene, a 2D carbon material has found vast application in biomedical field because of its exciting physico-chemical properties. The large planar sheet like structure helps graphene to act as an effective carrier of drug or biomolecules in enormous amount. However, limited data available on the biocompatibility of graphene upon interaction with the biological system prompts us to evaluate their toxicity in animal model. In this study organ distribution, clearance and toxicity of PEGylated reduced nanographene (PrGO) on Swiss Albino mice was investigated after intraperitoneal and intravenous administration. Biodistribution and blood clearance was monitored using confocal Raman mapping and indicated that PrGO was distributed on major organs such as brain, liver, kidney, spleen and bone marrow. Presence of PrGO in brain tissue suggests that it has the potential to cross blood brain barrier. Small amount of injected PrGO was found to excrete via urine. Repeated administration of PrGO induced acute liver injury, congestion in kidney and increased splenocytes proliferation in days following exposure. Hence the result of the study recommended that PrGO should undergo intensive safety assessment before clinical application or validated to be safe for medical use.
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25
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Yan X, Wu C, Chen T, Santos MM, Liu CL, Yang C, Zhang L, Ren J, Liao S, Guo H, Sukhova GK, Shi GP. Cathepsin S inhibition changes regulatory T-cell activity in regulating bladder cancer and immune cell proliferation and apoptosis. Mol Immunol 2016; 82:66-74. [PMID: 28033540 DOI: 10.1016/j.molimm.2016.12.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [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: 11/07/2016] [Revised: 12/17/2016] [Accepted: 12/19/2016] [Indexed: 12/29/2022]
Abstract
Regulatory T cells (Tregs) are immune suppressive cells, but their roles in tumor growth have been elusive, depending on tumor type or site. Our prior study demonstrated a role of cathepsin S (CatS) in reducing Treg immunosuppressive activity. Therefore, CatS inhibition in Tregs may exacerbate tumor growth. Using mouse bladder carcinoma MB49 cell subcutaneous implant tumor model, we detected no difference in tumor growth, whether mice were given saline- or CatS inhibitor-treated Tregs. However, mice that received inhibitor-treated Tregs had fewer splenic and tumor Tregs, and lower levels of tumor and splenic cell proliferation than mice that received saline-treated Tregs. In vitro, inhibitor-treated Tregs showed lower proliferation and higher apoptosis than saline-treated Tregs when cells were exposed to MB49. In contrast, both types of Tregs showed no difference in proliferation when they were co-cultured with normal splenocytes. Inhibitor-treated Tregs had less apoptosis in splenocytes, but more apoptosis in splenocytes with MB49 conditioned media than saline-treated Tregs. In turn, we detected less proliferation and more apoptosis of MB94 cells after co-culture with inhibitor-treated Tregs, compared with saline-treated Tregs. B220+ B-cell, CD4+ T-cell, and CD8+ T-cell proliferation and apoptosis were also lower in splenocytes co-cultured with inhibitor-treated Tregs than with saline-treated Tregs. Under the same conditions, the addition of cancer cell-conditioned media greatly increased CD8+ T-cell proliferation and reduced CD8+ T-cell apoptosis. These observations suggest that CatS inhibition of Tregs may reduce overall T-cell immunity under normal conditions, but enhance CD8+ T-cell immunity in the presence of cancer cells.
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Affiliation(s)
- Xiang Yan
- Department of Urology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, 210008, China; Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Chun Wu
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA; Department of Cardiology, Institute of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and technology, Wuhan, 430022, China
| | - Tao Chen
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Marcela M Santos
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Cong-Lin Liu
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Chongzhe Yang
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Lijun Zhang
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Jingyuan Ren
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Sha Liao
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Hongqiang Guo
- Department of Urology, Drum Tower Hospital, Nanjing University Medical School, Nanjing, 210008, China
| | - Galina K Sukhova
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Guo-Ping Shi
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
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Panigrahi GK, Yadav A, Mandal P, Tripathi A, Das M. Immunomodulatory potential of Rhein, an anthraquinone moiety of Cassia occidentalis seeds. Toxicol Lett 2016; 245:15-23. [PMID: 26784856 DOI: 10.1016/j.toxlet.2016.01.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [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: 10/12/2015] [Revised: 01/06/2016] [Accepted: 01/11/2016] [Indexed: 11/17/2022]
Abstract
Rhein, the most toxic anthraquinone moiety in Cassia occidentalis seeds, has been associated with hepatomyoencephalopathy (HME) in children. Structural and functional alterations in the lymphoid organs have been reported both in HME patients and experimental animals indicating a possibility of the dysfunction of immune system following exposure to CO seeds or its toxic anthraquinones (Panigrahi et al., 2014a). In the present study the mechanism of immune response of Rhein in splenocytes has been investigated by measuring functional assays of lymphocyte, cell surface receptor expression and analysis of cytokine levels. Results indicate that Rhein at a maximum dose of 10 μM is non cytotoxic up to 72 h in splenocytes. In addition to its potential to decrease the allogenic response of T-cells, Rhein significantly suppresses the proliferation of the concavalin A (Con A) and lipopolysaccharide (LPS) stimulated splenocytes. Lymphocyte receptor expression analysis revealed that Rhein exposure significantly down regulate the expression of CD3e, CD4, CD8, CD28, CD69 molecules in T-cells. The expression of CD19, CD28, CD40 in B-cells were also found to be significantly decreased following Rhein exposure. In accordance with the functional responses, Rhein treatment significantly lowered the expression of IL2 and IL6 cytokines in Con A stimulated splenocytes, and IL6, IL10, IFNγ and TNFα in LPS stimulated splenocytes. Over all, the study suggests the immunomodulatory activity of Rhein and that it would be useful in understanding the immune response of CO seeds in human subjects.
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Affiliation(s)
- Gati Krushna Panigrahi
- Food Toxicology Laboratory, Food, Drug & Chemical Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), M. G. Marg, Post Box No 80, Lucknow 226001, Uttar Pradesh, India
| | - Ashish Yadav
- Food Toxicology Laboratory, Food, Drug & Chemical Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), M. G. Marg, Post Box No 80, Lucknow 226001, Uttar Pradesh, India
| | - Payal Mandal
- Food Toxicology Laboratory, Food, Drug & Chemical Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), M. G. Marg, Post Box No 80, Lucknow 226001, Uttar Pradesh, India
| | - Anurag Tripathi
- Food Toxicology Laboratory, Food, Drug & Chemical Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), M. G. Marg, Post Box No 80, Lucknow 226001, Uttar Pradesh, India.
| | - Mukul Das
- Food Toxicology Laboratory, Food, Drug & Chemical Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), M. G. Marg, Post Box No 80, Lucknow 226001, Uttar Pradesh, India.
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27
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Yadav A, Kumar A, Das M, Tripathi A. Sodium benzoate, a food preservative, affects the functional and activation status of splenocytes at non cytotoxic dose. Food Chem Toxicol 2015; 88:40-7. [PMID: 26706697 DOI: 10.1016/j.fct.2015.12.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [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: 07/03/2015] [Revised: 12/11/2015] [Accepted: 12/14/2015] [Indexed: 12/31/2022]
Abstract
Sodium benzoate (SB) is a widely used food preservative due to its bacteriostatic and fungistatic properties. The acceptable daily intake of SB is 5 mg/kg-bw, however, it has been found to be used in the food commodities at relatively high levels (2119 mg/kg). Earlier studies on SB have shown its immunosuppressive properties, but comprehensive immunotoxicity data is lacking. Our studies have shown that SB was non cytotoxic in splenocytes up to 1000 μg/ml for 72 h, however at 2500 μg/ml it was found to be cytotoxic. Thus, 1000 μg/ml dose of SB was chosen for the subsequent experiments. SB significantly suppresses the proliferation of Con A and LPS stimulated splenocytes at 72 h, while allogenic response of T cells was significantly decreased after 96 h. SB did not affect the relative expression of CD3e or CD4 molecules following 72 h exposure, however, it downregulated the relative expression of CD8 co-receptor. Further, exposure of splenocytes to SB for 72 h led to reduced expression of CD28 and CD95, which play a vital role in T cell activation. SB also suppresses the relative expression of CD19, CD40 and CD95 receptors on B cells after 72 h. In addition to the functional responses, SB lowered the expression of IL4, IL6, IFNγ and IL17 cytokines in Con A stimulated splenocytes; and IL6, IFNγ and TNFα in LPS stimulated splenocytes following 48 h of exposure. Taken together, the present study is suggestive of the immunomodulatory potential of SB.
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Affiliation(s)
- Ashish Yadav
- Food Toxicology Lab, Food, Drug and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research (CSIR-IITR), M.G. Marg, Lucknow, 226001, Uttar Pradesh, India; Molecular Immunology Lab, School of Biotechnology, Faculty of Science, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India
| | - Arvind Kumar
- Molecular Immunology Lab, School of Biotechnology, Faculty of Science, Banaras Hindu University, Varanasi, 221005, Uttar Pradesh, India
| | - Mukul Das
- Food Toxicology Lab, Food, Drug and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research (CSIR-IITR), M.G. Marg, Lucknow, 226001, Uttar Pradesh, India.
| | - Anurag Tripathi
- Food Toxicology Lab, Food, Drug and Chemical Toxicology Group, CSIR- Indian Institute of Toxicology Research (CSIR-IITR), M.G. Marg, Lucknow, 226001, Uttar Pradesh, India.
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28
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Yi J, Zhu R, Wu J, Wu J, Tan Z. Ameliorative effect of betulinic acid on oxidative damage and apoptosis in the splenocytes of dexamethasone treated mice. Int Immunopharmacol 2015; 27:85-94. [PMID: 25959028 DOI: 10.1016/j.intimp.2015.04.050] [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: 12/07/2014] [Revised: 04/22/2015] [Accepted: 04/25/2015] [Indexed: 10/23/2022]
Abstract
Betulinic acid (BA) is a bioactive pentacyclic triterpene that exhibits a variety of biological activities including antioxidative and immunomodulative properties. The objective of this study was to investigate the potential splenocytes protective effect and underlying mechanism of BA using dexamethasone (Dex)-induced mice as a model system. Pretreatment with BA (0.25, 0.5, and 1.0 mg/kg) dose-dependently ameliorated Dex-induced oxidative damage and apoptosis after 14 days of feeding. In addition to reactive oxygen species scavenging activity in Dex-induced splenocytes, BA administration up-regulated antioxidant enzymes, decreased lipid peroxidation, restored mitochondrial function, decreased the expression of pro-apoptotic protein Bax, prevented the decline of anti-apoptotic protein Bcl-2, inhibited caspase-9 and caspase-3 activation, and improved cell survival. These findings reveal that BA was able to mitigate Dex-induced oxidative stress and might play an important role in repairs of oxidative damage in immunological system.
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Affiliation(s)
- Jine Yi
- College of Veterinary Medicine, Hunan Agricultural University, Changsha City 410128, China.
| | - Ruocen Zhu
- College of Veterinary Medicine, Hunan Agricultural University, Changsha City 410128, China
| | - Jing Wu
- College of Veterinary Medicine, Hunan Agricultural University, Changsha City 410128, China
| | - Jianping Wu
- Department of Agricultural, Food and Nutritional Science, 4-10 Ag/For Center, University of Alberta, Edmonton T6G2P5, Canada
| | - Zhuliang Tan
- College of Veterinary Medicine, Hunan Agricultural University, Changsha City 410128, China.
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Schmeits PCJ, Schaap MM, Luijten M, van Someren E, Boorsma A, van Loveren H, Peijnenburg AACM, Hendriksen PJM. Detection of the mechanism of immunotoxicity of cyclosporine A in murine in vitro and in vivo models. Arch Toxicol 2014; 89:2325-37. [PMID: 25224403 DOI: 10.1007/s00204-014-1365-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 04/22/2014] [Accepted: 09/04/2014] [Indexed: 01/25/2023]
Abstract
Transcriptomics in combination with in vitro cell systems is a powerful approach to unravel modes of action of toxicants. An important question is to which extent the modes of action as revealed by transcriptomics depend on cell type, species and study type (in vitro or in vivo). To acquire more insight into this, we assessed the transcriptomic effects of the immunosuppressive drug cyclosporine A (CsA) upon 6 h of exposure of the mouse cytotoxic T cell line CTLL-2, the thymoma EL-4 and primary splenocytes and compared these to the effects in spleens of mice orally treated with CsA for 7 days. EL-4 and CTLL-2 cells showed the highest similarities in response. CsA affected many genes in primary splenocytes that were not affected in EL-4 or CTLL-2. Pathway analysis demonstrated that CsA upregulated the unfolded protein response, endoplasmic reticulum stress and NRF2 activation in EL-4 cells, CTLL-2 cells and primary mouse splenocytes but not in mouse spleen in vivo. As expected, CsA downregulated cell cycle and immune response in splenocytes in vitro, spleens in vivo as well as CTLL-2 in vitro. Genes up- and downregulated in human Jurkat, HepG2 and renal proximal tubular cells were similarly affected in CTLL-2, EL-4 and primary splenocytes in vitro. In conclusion, of the models tested in this study, the known mechanism of immunotoxicity of CsA is best represented in the mouse cytotoxic T cell line CTLL-2. This is likely due to the fact that this cell line is cultured in the presence of a T cell activation stimulant (IL-2) making it more suitable to detect inhibitory effects on T cell activation.
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Affiliation(s)
- P C J Schmeits
- RIKILT Institute of Food Safety, Wageningen University and Research Centre, P.O. Box 230, 6700 AE, Wageningen, The Netherlands.
- Department of Toxicogenomics, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands.
| | - M M Schaap
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720 BA, Bilthoven, The Netherlands
- Department of Toxicogenetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - M Luijten
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720 BA, Bilthoven, The Netherlands
- Department of Toxicogenetics, Leiden University Medical Centre, Leiden, The Netherlands
| | - E van Someren
- Department of Toxicogenomics, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
- Research Group Microbiology and Systems Biology, TNO, P.O. Box 360, 3700 AJ, Zeist, The Netherlands
| | - A Boorsma
- Research Group Microbiology and Systems Biology, TNO, P.O. Box 360, 3700 AJ, Zeist, The Netherlands
| | - H van Loveren
- Department of Toxicogenomics, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
- Centre for Health Protection, National Institute for Public Health and the Environment (RIVM), P.O. Box 1, 3720 BA, Bilthoven, The Netherlands
| | - A A C M Peijnenburg
- RIKILT Institute of Food Safety, Wageningen University and Research Centre, P.O. Box 230, 6700 AE, Wageningen, The Netherlands
- Department of Toxicogenomics, Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands
| | - P J M Hendriksen
- RIKILT Institute of Food Safety, Wageningen University and Research Centre, P.O. Box 230, 6700 AE, Wageningen, The Netherlands.
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Kang MJ, Ha HW, Kim GH, Lee SK, Ahn YT, Kim DH, Jeong HG, Jeong TC. Role of Metabolism by Intestinal Bacteria in Arbutin-Induced Suppression of Lymphoproliferative Response in vitro. Biomol Ther (Seoul) 2013; 20:196-200. [PMID: 24116295 PMCID: PMC3792218 DOI: 10.4062/biomolther.2012.20.2.196] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Revised: 12/15/2011] [Accepted: 12/20/2011] [Indexed: 11/12/2022] Open
Abstract
Role of metabolism by intestinal bacteria in arbutin-induced immunotoxicity was investigated in splenocyte cultures. Following an incubation of arbutin with 5 different intestinal bacteria for 24 hr, its aglycone hydroquinone could be produced and detected in the bacterial culture media with different amounts. Toxic effects of activated arbutin by intestinal bacteria on lymphoproliferative response were tested in splenocyte cultures from normal mice. Lipopolysaccharide and concanavalin A were used as mitogens for B- and T-cells, respectively. When bacteria cultured medium with arbutin was treated into the splenocytes for 3 days, the medium cultured with bacteria producing large amounts of hydroquinone induced suppression of lymphoproliferative responses, indicating that metabolic activation by intestinal bacteria might be required in arbutin-induced toxicity. The results indicated that the present testing system might be applied for determining the possible role of metabolism by intestinal bacteria in certain chemical-induced immunotoxicity in animal cell cultures.
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Affiliation(s)
- Mi Jeong Kang
- College of Pharmacy, Yeungnam University, Gyeongsan 712-749
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Mucci JM, Suqueli García F, de Francesco PN, Ceci R, Di Genaro S, Fossati CA, Delpino MV, Rozenfeld PA. Uncoupling of osteoblast-osteoclast regulation in a chemical murine model of Gaucher disease. Gene 2013; 532:186-91. [PMID: 24076352 DOI: 10.1016/j.gene.2013.09.072] [Citation(s) in RCA: 20] [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: 08/08/2013] [Revised: 09/16/2013] [Accepted: 09/18/2013] [Indexed: 01/18/2023]
Abstract
Gaucher disease (GD) is caused by mutations in the GBA gene that confer a deficient level of activity of glucocerebrosidase (GCase). This deficiency leads to accumulation of the glycolipid glucocerebroside in the lysosomes of cells of monocyte/macrophage system. Type I GD is the mildest form and is characterized by the absence of neuronopathic affection. Bone compromise in Gaucher disease patients is the most disabling aspect of the disease. However, pathophysiological aspects of skeletal alterations are still poorly understood. The homeostasis of bone tissue is maintained by the balanced processes of bone resorption by osteoclasts and formation by osteoblasts. We decided to test whether bone resorption and/or bone formation could be altered by the use of a chemical in vitro murine model of Gaucher disease. We used two sources of cells from monocyte/macrophages lineage isolated from normal mice, splenocytes (S) and peritoneal macrophages (PM), and were exposed to CBE, the inhibitor of GCase (S-CBE and PM-CBE, respectively). Addition of both conditioned media (CM) from S-CBE and PM-CBE induced the differentiation of osteoclasts precursors from bone marrow to mature and functional osteoclasts. TNF-α could be one of the factors responsible for this effect. On the other hand, addition of CM to an osteoblast cell culture resulted in a reduction in expression of alkaline phosphatase and mineralization process. In conclusion, these results suggest implication of changes in both bone formation and bone resorption and are consistent with the idea that both sides of the homeostatic balance are affected in GD.
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Affiliation(s)
- Juan M Mucci
- LISIN, Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata 1900, Argentina
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Leposavić G, Nanut MP, Pilipović I, Kosec D, Arsenović-Ranin N, Stojić-Vukanić Z, Djikić J, Nacka-Aleksić M. Reshaping of T-lymphocyte compartment in adult prepubertaly ovariectomised rats: a putative role for progesterone deficiency. Immunobiology 2013; 219:118-30. [PMID: 24054944 DOI: 10.1016/j.imbio.2013.08.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 04/29/2013] [Revised: 07/05/2013] [Accepted: 08/16/2013] [Indexed: 01/09/2023]
Abstract
This study explores the role of ovarian hormones in the phenotypic shaping of peripheral T-cell pool over the reproductive lifespan of rats. For this purpose, 2-month-old prepubertally ovariectomised (Ox) rats, showing oestrogen and progesterone deficiency, and 11-month-old Ox rats, exhibiting only progesterone deficiency, were examined for thymus output, and cellularity and composition of major TCRαβ+ peripheral blood lymphocyte (PBL) and splenocyte subsets. Although ovariectomy increased thymic output in both 2- and 11-month-old rats, the count of both CD4+ and CD8+ PBLs and splenocytes increased only in the former. In the blood and spleen of 11-month-old Ox rats only the count of CD8+ cells increased. Although ovariectomy affected the total CD4+ count in none of the examined compartments from the 11-month-old rats, it increased CD4+FoxP3+ PBL and splenocyte relative proportions over those in the age-matched controls. The age-related differences in the cellularity and the major subset composition in Ox rats were linked to the differences in the ovarian steroid hormone levels registered in 2- and 11-month-old rats. The administration of progesterone to Ox rats during the seven days before the sacrificing confirmed contribution of this hormone deficiency to the ovariectomy-induced changes in the TCRαβ+ PBL and splenocyte pool from 11-month-old rats. The expansion of the CD8+ splenocyte subset in the 11-month-old Ox rats reflected increases in cellularity of memory and, particularly, naïve cells. This was due to greater thymic output of CD8+ cells and homeostatic proliferation than apoptosis in 11-month-old Ox rats when compared with age-matched sham-Ox control rats. The homeostatic changes within CD8+ splenocyte pool from 11-month-old Ox rats, most likely, reflected the enhanced splenic IL-7 and TGF-β mRNA expression. Overall, in adult female rats, circulating oestrogen and progesterone provide maintenance of T-cell counts, a diversity of T-cell repertoire, and the main T-cell subset composition in the periphery. Progesterone deficiency affects mainly the CD8+ lymphocyte compartment through increasing thymic CD8+ cell export and upsetting homeostatic regulation within the CD8+ splenocyte pool. These alterations were reversible through progesterone supplementation.
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Affiliation(s)
- Gordana Leposavić
- Department of Physiology, University of Belgrade, Faculty of Pharmacy, 450 Vojvode Stepe, 11221 Belgrade, Serbia.
| | - Milica Perišić Nanut
- Immunology Research Centre "Branislav Janković", Institute of Virology, Vaccines and Sera, "Torlak", 458 Vojvode Stepe, 11221 Belgrade, Serbia
| | - Ivan Pilipović
- Immunology Research Centre "Branislav Janković", Institute of Virology, Vaccines and Sera, "Torlak", 458 Vojvode Stepe, 11221 Belgrade, Serbia
| | - Duško Kosec
- Immunology Research Centre "Branislav Janković", Institute of Virology, Vaccines and Sera, "Torlak", 458 Vojvode Stepe, 11221 Belgrade, Serbia
| | - Nevena Arsenović-Ranin
- Department of Microbiology and Immunology, University of Belgrade, Faculty of Pharmacy, 450 Vojvode Stepe, 11221 Belgrade, Serbia
| | - Zorica Stojić-Vukanić
- Department of Microbiology and Immunology, University of Belgrade, Faculty of Pharmacy, 450 Vojvode Stepe, 11221 Belgrade, Serbia
| | - Jasmina Djikić
- Department of Physiology, University of Belgrade, Faculty of Pharmacy, 450 Vojvode Stepe, 11221 Belgrade, Serbia
| | - Mirjana Nacka-Aleksić
- Department of Physiology, University of Belgrade, Faculty of Pharmacy, 450 Vojvode Stepe, 11221 Belgrade, Serbia
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Duan WJ, Liu FL, He RR, Yuan WL, Li YF, Tsoi B, Su WW, Yao XS, Kurihara H. Autophagy is involved in the effects of resveratrol on prevention of splenocyte apoptosis caused by oxidative stress in restrained mice. Mol Nutr Food Res 2013; 57:1145-57. [PMID: 23505001 DOI: 10.1002/mnfr.201200662] [Citation(s) in RCA: 20] [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: 10/09/2012] [Revised: 01/04/2013] [Accepted: 01/16/2013] [Indexed: 12/27/2022]
Abstract
SCOPE Resveratrol, a powerful natural compound for human health, is widely reported for its immunity-related beneficial properties. However, few works have studied its effect mechanism on immunity. The present study was conducted to investigate the effects of resveratrol on splenic immunity in restraint stressed mice and the mechanism was further studied as autophagy induction. METHODS AND RESULTS Mice were administered with resveratrol for 7 days consecutively, fixed in restraint cages for 18 h, and recovered for 12 h after the last administration. Data showed that restraint led to spleen damages, including declined spleen index, decreased CD4(+) T-cell number, increased mitochondrial oxidative damage, and apoptosis of splenocytes. Resveratrol, vitamin C (antioxidant), and rapamycin (autophagy agonist) protected spleen functions. Meanwhile, rapamycin augmented the effects of resveratrol that were abolished by chloroquine (autophagy antagonists). Further studies showed that expressions of Beclin 1 and LC3β required in autophagy development were significantly upregulated by resveratrol but not by vitamin C. CONCLUSION This study demonstrated that resveratrol preserved splenic immunity of restraint stressed mice. It is meaningful to find that autophagy, apart from reactive oxygen species clearance, is included as a potential mechanism via which resveratrol ameliorated the state of oxidative stress and thus protected splenocytes in mice.
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Affiliation(s)
- Wen-Jun Duan
- Pharmacy College, Jinan University, Guangzhou, PR China
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Kim JM, Joo HG. Immunostimulatory Effects of β-glucan Purified from Paenibacillus polymyxa JB115 on Mouse Splenocytes. Korean J Physiol Pharmacol 2012; 16:225-30. [PMID: 22915986 PMCID: PMC3419756 DOI: 10.4196/kjpp.2012.16.4.225] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 06/07/2012] [Accepted: 06/22/2012] [Indexed: 11/21/2022]
Abstract
We investigated the effects of β-glucan purified from Paenibacillus polymyxa JB115 on the viability and proliferation of splenocytes. Splenocytes play a critical role in host immunity. MTT assays and trypan blue exclusion tests revealed that β-glucan significantly promoted the viability and proliferation of splenocytes over a range of concentrations. However, there was no specific subset change. β-glucan protected splenocytes from cytokine withdrawal-induced spontaneous cell death. For further mechanistic studies, ELISA assay revealed that β-glucan enhanced the expression of anti-apoptotic molecules and interleukin 7 (IL-7), a cytokine critical for lymphocyte survival. We also investigated the IL-2 dependency of β-glucan-treated splenocytes to determine if treated cells could still undergo clonal expansion. In flow cytometric analysis, β-glucan induced increased levels of the activation marker CD25 on the surface of splenocytes and β-glucan-treated splenocytes showed higher proliferation rates in response to IL-2 treatment. This study demonstrates that β-glucan can enhance the survival of splenocytes and provides valuable information to broaden the use of β-glucan in research fields.
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Affiliation(s)
- Ji-Mi Kim
- Laboratory of Veterinary Pharmacology, College of Veterinary Medicine, Jeju National University, Jeju 690-756, Korea
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