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Cacheiro-Llaguno C, Hernández-Subirá E, Díaz-Muñoz MD, Fresno M, Serrador JM, Íñiguez MA. Regulation of Cyclooxygenase-2 Expression in Human T Cells by Glucocorticoid Receptor-Mediated Transrepression of Nuclear Factor of Activated T Cells. Int J Mol Sci 2022; 23:13275. [PMID: 36362060 PMCID: PMC9653600 DOI: 10.3390/ijms232113275] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2023] Open
Abstract
Cyclooxygenase (COX) is the key enzyme in prostanoid synthesis from arachidonic acid (AA). Two isoforms, named COX-1 and COX-2, are expressed in mammalian tissues. The expression of COX-2 isoform is induced by several stimuli including cytokines and mitogens, and this induction is inhibited by glucocorticoids (GCs). We have previously shown that the transcriptional induction of COX-2 occurs early after T cell receptor (TCR) triggering, suggesting functional implications of this enzyme in T cell activation. Here, we show that dexamethasone (Dex) inhibits nuclear factor of activated T cells (NFAT)-mediated COX-2 transcriptional induction upon T cell activation. This effect is dependent on the presence of the GC receptor (GR), but independent of a functional DNA binding domain, as the activation-deficient GRLS7 mutant was as effective as the wild-type GR in the repression of NFAT-dependent transcription. Dex treatment did not disturb NFAT dephosphorylation, but interfered with activation mediated by the N-terminal transactivation domain (TAD) of NFAT, thus pointing to a negative cross-talk between GR and NFAT at the nuclear level. These results unveil the ability of GCs to interfere with NFAT activation and the induction of pro-inflammatory genes such as COX-2, and explain some of their immunomodulatory properties in activated human T cells.
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2
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Huang L, Chen W, Wei L, Su Y, Liang J, Lian H, Wang H, Long F, Yang F, Gao S, Tan Z, Xu J, Zhao J, Liu Q. Lonafarnib Inhibits Farnesyltransferase via Suppressing ERK Signaling Pathway to Prevent Osteoclastogenesis in Titanium Particle-Induced Osteolysis. Front Pharmacol 2022; 13:848152. [PMID: 35300293 PMCID: PMC8921770 DOI: 10.3389/fphar.2022.848152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 02/10/2022] [Indexed: 11/30/2022] Open
Abstract
Wear debris after total joint arthroplasty can attract the recruitment of macrophages, which release pro-inflammatory substances, triggering the activation of osteoclasts, thereby leading to periprosthetic osteolysis (PPOL) and aseptic loosening. However, the development of pharmacological strategies targeting osteoclasts to prevent periprosthetic osteolysis has not been fruitful. In this study, we worked toward researching the effects and mechanisms of a farnesyltransferase (FTase) inhibitor Lonafarnib (Lon) on receptor activator of nuclear factor κB (NF-κB) ligand (RANKL)-induced osteoclastogenesis and bone resorption, as well as the impacts of Lon on titanium particle-induced osteolysis. To investigate the impacts of Lon on bone resorption and osteoclastogenesis in vitro, bone marrow macrophages were incubated and stimulated with RANKL and macrophage colony-stimulating factor (M-CSF). The influence of Lon on osteolysis prevention in vivo was examined utilizing a titanium particle-induced mouse calvarial osteolysis model. The osteoclast-relevant genes expression was explored by real-time quantitative PCR. Immunofluorescence was used to detect intracellular localization of nuclear factor of activated T cells 1 (NFATc1). SiRNA silence assay was applied to examine the influence of FTase on osteoclasts activation. Related signaling pathways, including NFATc1 signaling, NF-κB, mitogen-activated protein kinases pathways were identified by western blot assay. Lon was illustrated to suppress bone resorptive function and osteoclastogenesis in vitro, and it also reduced the production of pro-inflammatory substances and prevented titanium particle-induced osteolysis in vivo. Lon decreased the expression of osteoclast-relevant genes and suppressed NFATc1 nuclear translocation and auto-amplification. Mechanistically, Lon dampened FTase, and inhibition of FTase reduced osteoclast formation by suppressing ERK signaling. Lon is a promising treatment option for osteoclast-related osteolysis diseases including periprosthetic osteolysis by targeted inhibition of FTase through suppressing ERK signaling.
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Affiliation(s)
- Linke Huang
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Department of Orthopaedics, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Weiwei Chen
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Linhua Wei
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China.,The Affiliated Nanning Infectious Disease Hospital of Guangxi Medical University, The Fourth People's Hospital of Nanning, Nanning, China
| | - Yuangang Su
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Jiamin Liang
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Haoyu Lian
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Hui Wang
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Feng Long
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Fan Yang
- Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Shiyao Gao
- Department of Orthopaedics, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhen Tan
- Department of Orthopaedics, The Second Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Jiake Xu
- School of Biomedical Sciences, University of Western Australia, Perth, WA, Australia
| | - Jinmin Zhao
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China.,Guangxi Key Laboratory of Regenerative Medicine, Guangxi Medical University, Nanning, China
| | - Qian Liu
- Research Centre for Regenerative Medicine, Orthopaedic Department, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Kim HJ, Kim H, Choi Y, Lee JH, Kim D, Lee SK, Park KS. Cinnamomum verum-derived O-methoxycinnamaldehyde prevents lipopolysaccharide-induced depressive-like behavior in mice via NFAT mRNA stability in T lymphocytes. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2021; 91:153703. [PMID: 34425473 DOI: 10.1016/j.phymed.2021.153703] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/30/2021] [Accepted: 08/06/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Depressive-like behaviors are related to inflammatory immune activation. Cinnamomum verum (CV) has anti-inflammatory effects, but the molecular mechanisms underlying the antidepressant effects after immunological activation still remain elusive. PURPOSE The aim of the present study was to investigate the effect of CV in improving depressive-like behavior and explore its underlying mechanism in T lymphocytes. METHODS Mice were randomly divided into Control, LPS, LPS plus fluoxetine, LPS plus CV, and LPS plus MCA groups. Behavior was evaluated using forced swimming test (FST) and tail suspension test (TST). The experimental group mice were exposed to LPS to induce depressive-like behavior. Cell viability was measured upon treating splenic T lymphocytes and Jurkat T cells with CV. Cytokine activity was measured using ELISA and RT-qPCR. The components of CV were analyzed by HPLC. NFAT expression was evaluated by western blotting, immunofluorescence, and luciferase assay. To verify the half-life of NFAT mRNA, Jurkat cells were treated with actinomycin D for 1.5, 3, and 4.5 h. RESULTS CV effectively prevents inflammation-induced depressive-like behaviors. CV dose-dependently decreased protein and mRNA levels of TNFα and IL-2. Inhibition of TNFα and IL-2 production involves an MCA-mediated decrease in NFAT mRNA level, rather than inhibition of nuclear translocation. This mechanism was independent of NFAT transcription inducer p38 MAPK; it can be attributed to the promotion of NFAT mRNA decay. CONCLUSION Overall, MCA might be an alternative or adjuvant to existing NFAT-targeting immunosuppressants for clinical prophylaxis or therapy in the context of inflammation-induced depressive disorder or other T-cell-associated inflammatory disorders.
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Affiliation(s)
- Hye Jin Kim
- KM Convergence Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea; College of Pharmacy, Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea
| | - Hyungjun Kim
- KM Science Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea
| | - Yujin Choi
- KM Science Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea
| | - Jun-Hwan Lee
- KM Science Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea; Korean Medicine Life Science, University of Science & Technology (UST), Campus of Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea
| | - Donghwan Kim
- Laboratory of Metabolism, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Sang Kook Lee
- College of Pharmacy, Natural Products Research Institute, Seoul National University, Seoul 08826, Republic of Korea.
| | - Ki-Sun Park
- KM Science Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Republic of Korea.
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Abstract
Phospholipase C γ1 (PLCγ1) is a member of the PLC family that functions as signal transducer by hydrolyzing membrane lipid to generate second messengers. The unique protein structure of PLCγ1 confers a critical role as a direct effector of VEGFR2 and signaling mediated by other receptor tyrosine kinases. The distinct vascular phenotypes in PLCγ1-deficient animal models and the gain-of-function mutations of PLCγ1 found in human endothelial cancers point to a major physiological role of PLCγ1 in the endothelial system. In this review, we discuss aspects of physiological and molecular function centering around PLCγ1 in the context of endothelial cells and provide a perspective for future investigation.
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Affiliation(s)
- Dongying Chen
- Yale Cardiovascular Research Center, Departments of Internal Medicine and Cell Biology, Yale University School of Medicine, New Haven, CT 06511, USA
| | - Michael Simons
- Yale Cardiovascular Research Center, Departments of Internal Medicine and Cell Biology, Yale University School of Medicine, New Haven, CT 06511, USA.
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Cheriyan AM, Ume AC, Francis CE, King KN, Linck VA, Bai Y, Cai H, Hoover RS, Ma HP, Gooch JL, Williams CR. Calcineurin A-α suppression drives nuclear factor-κB-mediated NADPH oxidase-2 upregulation. Am J Physiol Renal Physiol 2021; 320:F789-F798. [PMID: 33615888 PMCID: PMC8424558 DOI: 10.1152/ajprenal.00254.2020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 01/19/2021] [Accepted: 02/09/2021] [Indexed: 12/26/2022] Open
Abstract
Calcineurin inhibitors (CNIs) are vital immunosuppressive therapies in the management of inflammatory conditions. A long-term consequence is nephrotoxicity. In the kidneys, the primary, catalytic calcineurin (CnA) isoforms are CnAα and CnAβ. Although the renal phenotype of CnAα-/- mice substantially mirrors CNI-induced nephrotoxicity, the mechanisms downstream of CnAα are poorly understood. Since NADPH oxidase-2 (Nox2)-derived oxidative damage has been implicated in CNI-induced nephrotoxicity, we hypothesized that CnAα inhibition drives Nox2 upregulation and promotes oxidative stress. To test the hypothesis, Nox2 regulation was investigated in kidneys from CnAα-/-, CnAβ-/-, and wild-type (WT) littermate mice. To identify the downstream mediator of CnAα, nuclear factor of activated T cells (NFAT) and NF-κB regulation was examined. To test if Nox2 is transcriptionally regulated via a NF-κB pathway, CnAα-/- and WT renal fibroblasts were treated with the NF-κB inhibitor caffeic acid phenethyl ester. Our findings showed that cyclosporine A treatment induced Nox2 upregulation and oxidative stress. Furthermore, Nox2 upregulation and elevated ROS generation occurred only in CnAα-/- mice. In these mice, NF-κB but not NFAT activity was increased. In CnAα-/- renal fibroblasts, NF-κB inhibition prevented Nox2 upregulation and reactive oxygen species (ROS) generation. In conclusion, these findings indicate that 1) CnAα loss stimulates Nox2 upregulation, 2) NF-κB is a novel CnAα-regulated transcription factor, and 3) NF-κB mediates CnAα-induced Nox2 and ROS regulation. Our results demonstrate that CnAα plays a key role in Nox2 and ROS generation. Furthermore, these novel findings provide evidence of divergent CnA isoform signaling pathways. Finally, this study advocates for CnAα-sparing CNIs, ultimately circumventing the CNI nephrotoxicity.NEW & NOTEWORTHY A long-term consequence of calcineurin inhibitors (CNIs) is oxidative damage and nephrotoxicity. This study indicates that NF-κB is a novel calcineurin-regulated transcription factor that is activated with calcineurin inhibition, thereby driving oxidative damage in CNI nephropathy. These findings provide additional evidence of divergent calcineurin signaling pathways and suggest that selective CNIs could improve the long-term outcomes of patients by mitigating renal side effects.
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Affiliation(s)
- Aswathy M Cheriyan
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
| | - Adaku C Ume
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio
| | - Cynthia E Francis
- Department of Pharmaceutical Sciences, School of Pharmacy, Philadelphia College of Osteopathic Medicine, Suwanee, Georgia
| | - Keyona N King
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
| | - Valerie A Linck
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
| | - Yun Bai
- Department of Pharmaceutical Sciences, School of Pharmacy, Philadelphia College of Osteopathic Medicine, Suwanee, Georgia
| | - Hui Cai
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
- Research Service, Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
| | - Robert S Hoover
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
- Research Service, Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
| | - Heping P Ma
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
| | - Jennifer L Gooch
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
- Department of Pharmaceutical Sciences, School of Pharmacy, Philadelphia College of Osteopathic Medicine, Suwanee, Georgia
- Research Service, Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
| | - Clintoria R Williams
- Division of Nephrology, Department of Medicine, and Department of Physiology, Emory University, Atlanta, Georgia
- Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio
- Research Service, Atlanta Veterans Affairs Medical Center, Atlanta, Georgia
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6
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Hokello J, Sharma AL, Tyagi M. Efficient Non-Epigenetic Activation of HIV Latency through the T-Cell Receptor Signalosome. Viruses 2020; 12:v12080868. [PMID: 32784426 PMCID: PMC7472175 DOI: 10.3390/v12080868] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/05/2020] [Accepted: 08/06/2020] [Indexed: 12/14/2022] Open
Abstract
Human immunodeficiency virus type-1 (HIV-1) can either undergo a lytic pathway to cause productive systemic infections or enter a latent state in which the integrated provirus remains transcriptionally silent for decades. The ability to latently infect T-cells enables HIV-1 to establish persistent infections in resting memory CD4+ T-lymphocytes which become reactivated following the disruption or cessation of intensive drug therapy. The maintenance of viral latency occurs through epigenetic and non-epigenetic mechanisms. Epigenetic mechanisms of HIV latency regulation involve the deacetylation and methylation of histone proteins within nucleosome 1 (nuc-1) at the viral long terminal repeats (LTR) such that the inhibition of histone deacetyltransferase and histone lysine methyltransferase activities, respectively, reactivates HIV from latency. Non-epigenetic mechanisms involve the nuclear restriction of critical cellular transcription factors such as nuclear factor-kappa beta (NF-κB) or nuclear factor of activated T-cells (NFAT) which activate transcription from the viral LTR, limiting the nuclear levels of the viral transcription transactivator protein Tat and its cellular co-factor positive transcription elongation factor b (P-TEFb), which together regulate HIV transcriptional elongation. In this article, we review how T-cell receptor (TCR) activation efficiently induces NF-κB, NFAT, and activator protein 1 (AP-1) transcription factors through multiple signal pathways and how these factors efficiently regulate HIV LTR transcription through the non-epigenetic mechanism. We further discuss how elongation factor P-TEFb, induced through an extracellular signal-regulated kinase (ERK)-dependent mechanism, regulates HIV transcriptional elongation before new Tat is synthesized and the role of AP-1 in the modulation of HIV transcriptional elongation through functional synergy with NF-κB. Furthermore, we discuss how TCR signaling induces critical post-translational modifications of the cyclin-dependent kinase 9 (CDK9) subunit of P-TEFb which enhances interactions between P-TEFb and the viral Tat protein and the resultant enhancement of HIV transcriptional elongation.
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Affiliation(s)
- Joseph Hokello
- Department of Basic Science, Faculty of Science and Technology, Kampala International University-Western Campus, P.O Box 71, Bushenyi, Uganda;
| | | | - Mudit Tyagi
- Center for Translational Medicine, Thomas Jefferson University, 1020 Locust Street, Philadelphia, PA 19107, USA;
- Correspondence:
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7
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Khaliullin TO, Yanamala N, Newman MS, Kisin ER, Fatkhutdinova LM, Shvedova AA. Comparative analysis of lung and blood transcriptomes in mice exposed to multi-walled carbon nanotubes. Toxicol Appl Pharmacol 2020; 390:114898. [PMID: 31978390 DOI: 10.1016/j.taap.2020.114898] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 01/16/2020] [Accepted: 01/21/2020] [Indexed: 12/16/2022]
Abstract
Pulmonary exposure to multi-walled carbon nanotubes (MWCNT) causes inflammation, fibroproliferation, immunotoxicity, and systemic responses in rodents. However, the search for representative biomarkers of exposure is an ongoing endeavor. Whole blood gene expression profiling is a promising new approach for the identification of novel disease biomarkers. We asked if the whole blood transcriptome reflects pathology-specific changes in lung gene expression caused by MWCNT. To answer this question, we performed mRNA sequencing analysis of the whole blood and lung in mice administered MWCNT or vehicle solution via pharyngeal aspiration and sacrificed 56 days later. The pattern of lung mRNA expression as determined using Ingenuity Pathway Analysis (IPA) was indicative of continued inflammation, immune cell trafficking, phagocytosis, and adaptive immune responses. Simultaneously, innate immunity-related transcripts (Plunc, Bpifb1, Reg3g) and cancer-related pathways were downregulated. IPA analysis of the differentially expressed genes in the whole blood suggested increased hematopoiesis, predicted activation of cancer/tumor development pathways, and atopy. There were several common upregulated genes between whole blood and lungs, important for adaptive immune responses: Cxcr1, Cd72, Sharpin, and Slc11a1. Trim24, important for TH2 cell effector function, was downregulated in both datasets. Hla-dqa1 mRNA was upregulated in the lungs and downregulated in the blood, as was Lilrb4, which controls the reactivity of immune response. "Cancer" disease category had opposing activation status in the two datasets, while the only commonality was "Hypersensitivity". Transcriptome changes occurring in the lungs did not produce a completely replicable pattern in whole blood; however, specific systemic responses may be shared between transcriptomic profiles.
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Affiliation(s)
- Timur O Khaliullin
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA; Health Effects Laboratory Division, NIOSH, CDC, Morgantown, WV, USA.
| | - Naveena Yanamala
- Health Effects Laboratory Division, NIOSH, CDC, Morgantown, WV, USA.
| | - Mackenzie S Newman
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA.
| | - Elena R Kisin
- Health Effects Laboratory Division, NIOSH, CDC, Morgantown, WV, USA.
| | - Liliya M Fatkhutdinova
- Department of Hygiene and Occupational Medicine, Kazan State Medical University, Kazan, Russia
| | - Anna A Shvedova
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, WV, USA; Health Effects Laboratory Division, NIOSH, CDC, Morgantown, WV, USA.
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8
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Abstract
Two decades ago a class of ion channels, hitherto unsuspected, was discovered. In mammals these Transient Receptor Potential channels (TRPs) have not only expanded in number (to 26 functional channels) but also expanded the view of our interface with the physical and chemical environment. Some are heat and cold sensors while others monitor endogenous and/or exogenous chemical signals. Some TRP channels monitor osmotic potential, and others measure cell movement, stretching, and fluid flow. Many TRP channels are major players in nociception and integration of pain signals. One member of the vanilloid sub-family of channels is TRPV6. This channel is highly selective for divalent cations, particularly calcium, and plays a part in general whole-body calcium homeostasis, capturing calcium in the gut from the diet. TRPV6 can be greatly elevated in a number of cancers deriving from epithelia and considerable study has been made of its role in the cancer phenotype where calcium control is dysfunctional. This review compiles and updates recent published work on TRPV6 as a promising drug target in a number of cancers including those afflicting breast, ovarian, prostate and pancreatic tissues.
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Affiliation(s)
- John M. Stewart
- Soricimed Biopharma Inc. 18 Botsford Street, Moncton, NB, Canada, E1C 4W7
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9
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Andrade-Souza VA, Ghiarone T, Sansonio A, Santos Silva KA, Tomazini F, Arcoverde L, Fyfe J, Perri E, Saner N, Kuang J, Bertuzzi R, Leandro CG, Bishop DJ, Lima-Silva AE. Exercise twice-a-day potentiates markers of mitochondrial biogenesis in men. FASEB J 2019; 34:1602-1619. [PMID: 31914620 DOI: 10.1096/fj.201901207rr] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Revised: 10/31/2019] [Accepted: 11/04/2019] [Indexed: 12/18/2022]
Abstract
Endurance exercise begun with reduced muscle glycogen stores seems to potentiate skeletal muscle protein abundance and gene expression. However, it is unknown whether this greater signaling responses is due to performing two exercise sessions in close proximity-as a first exercise session is necessary to reduce the muscle glycogen stores. In the present study, we manipulated the recovery duration between a first muscle glycogen-depleting exercise and a second exercise session, such that the second exercise session started with reduced muscle glycogen in both approaches but was performed either 2 or 15 hours after the first exercise session (so-called "twice-a-day" and "once-daily" approaches, respectively). We found that exercise twice-a-day increased the nuclear abundance of transcription factor EB (TFEB) and nuclear factor of activated T cells (NFAT) and potentiated the transcription of peroxisome proliferator-activated receptor-ɣ coactivator 1-alpha (PGC-1α), peroxisome proliferator-activated receptor-alpha (PPARα), and peroxisome proliferator-activated receptor beta/delta (PPARβ/δ) genes, in comparison with the once-daily exercise. These results suggest that part of the elevated molecular signaling reported with previous "train-low" approaches might be attributed to performing two exercise sessions in close proximity. The twice-a-day approach might be an effective strategy to induce adaptations related to mitochondrial biogenesis and fat oxidation.
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Affiliation(s)
- Victor Amorim Andrade-Souza
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - Thaysa Ghiarone
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - Andre Sansonio
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - Kleiton Augusto Santos Silva
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil.,Department of Medicine, University of Missouri School of Medicine, Columbia, MI, USA
| | - Fabiano Tomazini
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - Lucyana Arcoverde
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - Jackson Fyfe
- School of Exercise and Nutrition Sciences, Faculty of Health, Deakin University, Burwood, VIC, Australia
| | - Enrico Perri
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Nicholas Saner
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Jujiao Kuang
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Romulo Bertuzzi
- Endurance Performance Research Group, School of Physical Education and Sport, University of São Paulo, São Paulo, SP, Brazil
| | - Carol Gois Leandro
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil
| | - David John Bishop
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia.,School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Adriano Eduardo Lima-Silva
- Department of Physical Education and Sports Science, Academic Center of Vitoria, Federal University of Pernambuco, Vitória de Santo Antão, PE, Brazil.,Human Performance Research Group, Academic Department of Physical Education, Technological Federal University of Paraná, Curitiba, PR, Brazil
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10
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Gang W, Yu-Zhu W, Yang Y, Feng S, Xing-Li F, Heng Z. The critical role of calcineurin/NFAT (C/N) pathways and effective antitumor prospect for colorectal cancers. J Cell Biochem 2019; 120:19254-19273. [PMID: 31489709 DOI: 10.1002/jcb.29243] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 06/10/2019] [Indexed: 12/11/2022]
Abstract
Transcription factors (TFs) like a nuclear factor of activated T-cells (NFAT) and its controller calcineurin are highly expressed in primary intestinal epithelial cells (IECs) due to delamination, damage by tumor-associated flora and selective activation in the intestinal tract tumor are crucial in the progression and growth of colorectal cancer (CRC). This study sought to summarize the current findings concerning the dysregulated calcineurin/NFAT (C/N) signaling involved in CRC initiation and progression. These signalings include proliferation, T-cell functions, and glycolysis with high lactate production that remodels the acidosis, which genes in tumor cells provide an evolutionary advantage, or even increased their attack phenotype. Moreover, the relationship between C/N and gut microbiome in CRC, especially role of NFAT and toll-like receptor signaling in regulating intestinal microbiota are also discussed. Furthermore, this review will discuss the proteins and genes relating to C/N induced acidosis in CRC, which includes ASIC2 regulated C/N1 and TFs associated with the glycolytic by-product that affect T-cell functions and CRC cell growth. It is revealed that calcineurin or NFAT targeting to antitumor, selective calcineurin inhibition or targets in NFAT signaling may be useful for clinical treatment of CRC. This can further aid in the identification of specific targets via cancer patient-personalized approach. Future studies should be focused on targeting to C/N or TLR signaling by the combination of therapeutic agents to regulate T-cell functions and gut microbiome for activating potent anticancer property with the prospect of potentiating the antitumor therapy for CRC.
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Affiliation(s)
- Wang Gang
- Department of Pharmaceutics, Shanghai Eight People's Hospital, Jiangsu University, Shanghai, China
| | - Wang Yu-Zhu
- Department of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Yu Yang
- Department of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Shi Feng
- Department of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Fu Xing-Li
- Department of Medicine, Jiangsu University, Zhenjiang, Jiangsu, China
| | - Zhang Heng
- Department of General Surgery, Nanjing Lishui District People's Hospital, Zhongda Hospital Lishui Branch, Southeast University, Nanjing, China
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Haustrate A, Hantute-Ghesquier A, Prevarskaya N, Lehen’kyi V. RETRACTED: TRPV6 calcium channel regulation, downstream pathways, and therapeutic targeting in cancer. Cell Calcium 2019; 80:117-124. [DOI: 10.1016/j.ceca.2019.04.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/19/2019] [Accepted: 04/20/2019] [Indexed: 11/30/2022]
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12
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Vilariño-Güell C, Zimprich A, Martinelli-Boneschi F, Herculano B, Wang Z, Matesanz F, Urcelay E, Vandenbroeck K, Leyva L, Gris D, Massaad C, Quandt JA, Traboulsee AL, Encarnacion M, Bernales CQ, Follett J, Yee IM, Criscuoli MG, Deutschländer A, Reinthaler EM, Zrzavy T, Mascia E, Zauli A, Esposito F, Alcina A, Izquierdo G, Espino-Paisán L, Mena J, Antigüedad A, Urbaneja-Romero P, Ortega-Pinazo J, Song W, Sadovnick AD. Exome sequencing in multiple sclerosis families identifies 12 candidate genes and nominates biological pathways for the genesis of disease. PLoS Genet 2019; 15:e1008180. [PMID: 31170158 PMCID: PMC6553700 DOI: 10.1371/journal.pgen.1008180] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Accepted: 05/07/2019] [Indexed: 12/12/2022] Open
Abstract
Multiple sclerosis (MS) is an inflammatory disease of the central nervous system characterized by myelin loss and neuronal dysfunction. Although the majority of patients do not present familial aggregation, Mendelian forms have been described. We performed whole-exome sequencing analysis in 132 patients from 34 multi-incident families, which nominated likely pathogenic variants for MS in 12 genes of the innate immune system that regulate the transcription and activation of inflammatory mediators. Rare missense or nonsense variants were identified in genes of the fibrinolysis and complement pathways (PLAU, MASP1, C2), inflammasome assembly (NLRP12), Wnt signaling (UBR2, CTNNA3, NFATC2, RNF213), nuclear receptor complexes (NCOA3), and cation channels and exchangers (KCNG4, SLC24A6, SLC8B1). These genes suggest a disruption of interconnected immunological and pro-inflammatory pathways as the initial event in the pathophysiology of familial MS, and provide the molecular and biological rationale for the chronic inflammation, demyelination and neurodegeneration observed in MS patients.
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Affiliation(s)
| | | | - Filippo Martinelli-Boneschi
- Laboratory of Human Genetics of Neurological Disorders, CNS Inflammatory Unit, Institute of Experimental Neurology, IRCCS San Raffaele Scientific Institute, Milan, Italy
- MS Unit and Department of Neurology, IRCCS Policlinico San Donato, Milan, Italy
- Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Bruno Herculano
- Townsend Family Laboratories, Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - Zhe Wang
- Townsend Family Laboratories, Department of Psychiatry, University of British Columbia, Vancouver, Canada
- National Clinical Research Center for Geriatric Diseases, Xuanwu Hospital of the Capital Medical University, Beijing, China
| | - Fuencisla Matesanz
- Department of Cell Biology and Immunology, Instituto de Parasitología y Biomedicina López Neyra (IPBLN), CSIC, Granada, Spain
| | - Elena Urcelay
- Immunology Dept, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
- Red Española de Esclerosis Múltiple REEM, Madrid, Spain
| | - Koen Vandenbroeck
- Achucarro Basque Center for Neuroscience, Universidad del País Vasco (UPV/EHU), Leioa, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain
| | - Laura Leyva
- Red Española de Esclerosis Múltiple REEM, Madrid, Spain
- Instituto de Investigación Biomédica de Málaga-IBIMA, Unidad de Gestion Clínica de Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Denis Gris
- Division of Immunology, Department of Pediatrics, CR-CHUS, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Canada
| | - Charbel Massaad
- Toxicology, Pharmacology and Cell Signalisation—UMR-S 1124 Université Paris Descartes, Paris, France
| | - Jacqueline A. Quandt
- Department of Pathology, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Anthony L. Traboulsee
- Division of Neurology, Faculty of Medicine, University of British Columbia, Vancouver, Canada
| | - Mary Encarnacion
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Cecily Q. Bernales
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Jordan Follett
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Irene M. Yee
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Maria G. Criscuoli
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
| | - Angela Deutschländer
- Department of Neurology, Mayo Clinic Florida, Jacksonville, FL, United States of America
- Department of Clinical Genomics, Mayo Clinic Florida, Jacksonville, FL, United States of America
- Department of Neuroscience, Mayo Clinic Florida, Jacksonville, FL, United States of America
| | - Eva M. Reinthaler
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Tobias Zrzavy
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - Elisabetta Mascia
- Laboratory of Human Genetics of Neurological Disorders, CNS Inflammatory Unit, Institute of Experimental Neurology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Andrea Zauli
- Laboratory of Human Genetics of Neurological Disorders, CNS Inflammatory Unit, Institute of Experimental Neurology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Federica Esposito
- Laboratory of Human Genetics of Neurological Disorders, CNS Inflammatory Unit, Institute of Experimental Neurology, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - Antonio Alcina
- Department of Cell Biology and Immunology, Instituto de Parasitología y Biomedicina López Neyra (IPBLN), CSIC, Granada, Spain
| | | | - Laura Espino-Paisán
- Immunology Dept, Hospital Clínico San Carlos, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
- Red Española de Esclerosis Múltiple REEM, Madrid, Spain
| | - Jorge Mena
- Achucarro Basque Center for Neuroscience, Universidad del País Vasco (UPV/EHU), Leioa, Spain
| | - Alfredo Antigüedad
- Neurology Department, Hospital Universitario de Cruces, S/N, Baracaldo, Spain
| | - Patricia Urbaneja-Romero
- Red Española de Esclerosis Múltiple REEM, Madrid, Spain
- Instituto de Investigación Biomédica de Málaga-IBIMA, Unidad de Gestion Clínica de Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Jesús Ortega-Pinazo
- Instituto de Investigación Biomédica de Málaga-IBIMA, Unidad de Gestion Clínica de Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Weihong Song
- Townsend Family Laboratories, Department of Psychiatry, University of British Columbia, Vancouver, Canada
| | - A. Dessa Sadovnick
- Department of Medical Genetics, University of British Columbia, Vancouver, Canada
- Division of Neurology, Faculty of Medicine, University of British Columbia, Vancouver, Canada
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13
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Yamaguchi K. Tacrolimus treatment for infertility related to maternal-fetal immune interactions. Am J Reprod Immunol 2019; 81:e13097. [PMID: 30689243 DOI: 10.1111/aji.13097] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 01/15/2019] [Accepted: 01/16/2019] [Indexed: 12/29/2022] Open
Abstract
Many approaches have been used to achieve successful pregnancies in patients with infertility, though existing treatments remain unsatisfactory in patients with infertility caused by abnormal maternal-fetal immunity. However, our understanding of the immunological aspects of infertility has steadily progressed, aided by recent research into organ transplantation and cancer. The results of these recent analyses have led to the development and evaluation of several candidate immunological treatments, but the use of immunological treatments remains a novel approach. The current paper presents the hypothesis that tacrolimus may have potential as a candidate agent for the treatment of maternal-fetal immunity-related infertility.
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Affiliation(s)
- Koushi Yamaguchi
- Center of Maternal-Fetal, Neonatal and Reproductive Medicine, National Center for Child Health and Development, Tokyo, Japan
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14
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Xue H, Wang Y, MacCormack TJ, Lutes T, Rice C, Davey M, Dugourd D, Ilenchuk TT, Stewart JM. Inhibition of Transient Receptor Potential Vanilloid 6 channel, elevated in human ovarian cancers, reduces tumour growth in a xenograft model. J Cancer 2018; 9:3196-3207. [PMID: 30210643 PMCID: PMC6134823 DOI: 10.7150/jca.20639] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 10/06/2017] [Indexed: 12/22/2022] Open
Abstract
Background: Transient Receptor Potential Vanilloid 6 (TRPV6), a non-voltage gated calcium channel, is implicated in malignancies and correlates with Gleason scores in prostate cancer and with poor prognosis in breast cancer. Data on the TRPV6 status of ovarian malignancies has not received significant attention. The effect of inhibiting TRPV6 activity on ovarian tumour growth has never been reported. Methods: We quantified TRPV6 mRNA and protein in biopsies of five types of ovarian cancer at different stages and grades by quantitative PCR and immunohistochemistry respectively. We verified the presence of TRPV6 in SKOV-3 cells and xenografts by Western Blotting. NOD/SCID mice bearing xenografted ovarian tumours derived from SKOV-3 were treated daily with TRPV6-antagonistic peptides (SOR-C13 and SOR-C27) at 400, 600 and 800 mg/kg delivered intraperitoneally (i.p.) over 12 days. Data from qPCR and tumour growth experiments were compared with a Student's t-test. Immunohistochemical ranking of staining were compared with Kruskall-Wallace one-way ANOVA and Dunn's Multiple Comparison post-test. Results: TRPV6 mRNA and protein are significantly elevated at all stages and grades of 5 ovarian cancer types over normal tissue. Overall qPCR log2 values (n, mean, ± SEM) for mRNA in tumour (n = 165, 5.06 ± 0.16) were greater (p < 0.05) than normal tissues (n = 26, 0.45 ± 0.41). All stages and grades included in the biopsy arrays were significantly greater than normal tissues. Immunohistochemical staining of TRPV6 was ranked >2 (faint in most cells) in 80.5% of tumours (123) while 92% of normal tissues (23) ranked ≤ 2. Daily i.p. injection with SOR-C13 (400, 600 and 800 mg/kg) over 12 days inhibits tumour growth (59%) at the highest dose compared to non-treated controls. SOR-C27 at 800 mg/kg SOR-C27 inhibited tumour growth 55% after 12 days. Results of daily and intermittent dosing (Days 1, 2, 3 and 8, 9, 10) with SOR-C13 were indistinguishable. Conclusion: TRPV6 mRNA and protein are elevated in biopsies of ovarian cancers compared to normal tissue. Inhibition of TRPV6 activity significantly reduces ovarian tumour growth providing evidence that TRPV6 is a feasible oncology target in ovarian cancers.
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Affiliation(s)
- Hui Xue
- Department of Experimental Therapeutics, BC Cancer Agency, 675 West 10 th Avenue, Vancouver BC, Canada, V5Z 1L3
| | - Yuzhuo Wang
- Department of Experimental Therapeutics, BC Cancer Agency, 675 West 10 th Avenue, Vancouver BC, Canada, V5Z 1L3
| | - Tyson J MacCormack
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, New Brunswick, Canada. E4L 1E4
| | - Tyler Lutes
- Department of Chemistry and Biochemistry, Mount Allison University, Sackville, New Brunswick, Canada. E4L 1E4.,Soricimed Biopharma Inc. 18 Botsford Street, Suite 201, Moncton, NB, Canada, E1C 4W7
| | - Christopher Rice
- Soricimed Biopharma Inc. 18 Botsford Street, Suite 201, Moncton, NB, Canada, E1C 4W7
| | - Michelle Davey
- Soricimed Biopharma Inc. 18 Botsford Street, Suite 201, Moncton, NB, Canada, E1C 4W7
| | - Dominique Dugourd
- Soricimed Biopharma Inc. 18 Botsford Street, Suite 201, Moncton, NB, Canada, E1C 4W7
| | - T Toney Ilenchuk
- Soricimed Biopharma Inc. 18 Botsford Street, Suite 201, Moncton, NB, Canada, E1C 4W7
| | - John M Stewart
- Soricimed Biopharma Inc. 18 Botsford Street, Suite 201, Moncton, NB, Canada, E1C 4W7
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15
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Attakpa ES, Bertin GA, Chabi NW, Ategbo JM, Seri B, Khan NA. Moringa oleifera-rich diet and T cell calcium signaling in spontaneously hypertensive rats. Physiol Res 2017; 66:753-767. [PMID: 28406707 DOI: 10.33549/physiolres.933397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Moringa oleifera is a plant whose fruits, roots and leaves have been advocated for traditional medicinal uses. The physicochemical analysis shows that Moringa oleifera contains more dietary polyunsaturated fatty acids (PUFA) than saturated fatty acids (SFA). The consumption of an experimental diet enriched with Moringa oleifera extracts lowered blood pressure in spontaneously hypertensive rats (SHR), but not in normotensive Wistar-Kyoto (WKY) rats as compared to rats fed an unsupplemented control diet. Anti-CD3-stimulated T cell proliferation was diminished in both strains of rats fed the Moringa oleifera. The experimental diet lowered secretion of interleukin-2 in SHR, but not in WKY rats compared with rats fed the control diet. Studies of platelets from patients with primary hypertension and from SHR support the notion that the concentration of intracellular free calcium [Ca(2+)](i) is modified in both clinical and experimental hypertension. We observed that the basal, [Ca(2+)](i) was lower in T cells of SHR than in those of WKY rats fed the control diet. Feeding the diet with Moringa oleifera extracts to WKY rats did not alter basal [Ca(2+)](i) in T cells but increased basal [Ca(2+)](i) in SHR. Our study clearly demonstrated that Moringa oleifera exerts antihypertensive effects by inhibiting the secretion of IL-2 and modulates T cell calcium signaling in hypertensive rats.
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Affiliation(s)
- E S Attakpa
- Laboratoire de Physiopathologie Moléculaire et Toxicologie, Département de Physiologie Animale, Faculté des Sciences et Techniques, Université d'Abomey Calavi, Cotonou, Republic of Benin.
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16
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Boczek T, Lisek M, Ferenc B, Zylinska L. Cross talk among PMCA, calcineurin and NFAT transcription factors in control of calmodulin gene expression in differentiating PC12 cells. BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS 2017; 1860:502-515. [PMID: 28153703 DOI: 10.1016/j.bbagrm.2017.01.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 01/16/2017] [Accepted: 01/27/2017] [Indexed: 11/19/2022]
Abstract
Brain aging is characterized by progressive loss of plasma membrane calcium pump (PMCA) and its activator - calmodulin (CaM), but the mechanism of this phenomenon remains unresolved. CaM encoded by three genes Calm1, Calm2, Calm3, works to translate Ca2+ signal into changes in frequently opposite cellular activities. This unique function allows CaM to affect gene expression via stimulation of calcineurin (CaN) and its downstream target - nuclear factor of activated T-cells (NFAT) and to terminate Ca2+ signal by stimulation of its extrusion. PMCA, which exists in four isoforms PMCA1-4, may in turn shape the pattern of Ca2+ transients and control CaN activity by its direct binding. Therefore, the interplay between PMCA, CaM and CaN/NFAT is highly plausible. To verify that, we used differentiated PC12 cells with reduced expression of PMCA2 or PMCA3 to mimic the potential changes in aged brain. Manipulation in PMCAs level decreased CaM protein in PMCA2 or PMCA3-reduced lines that was accompanied by down-regulation of Calm1 and Calm2 in both lines, but Calm3 only in PMCA2-reduced cells. Further studies showed substantially higher NFATc2 nuclear accumulation and increased NFAT transcriptional activity. Blocking of CaN/NFAT signalling resulted in almost full CaM recovery, mainly due to up-regulation of Calm2 and Calm3 genes. Moreover, higher occupancy of Calm2 and Calm3 promoters by NFATc2 and increased expression of these genes in response to NFATc2 silencing were demonstrated in PMCA2 and PMCA3-reduced lines. Our results indicate that decrease in CaM level in response to PMCAs downregulation can be driven by CaN/NFAT pathway.
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Affiliation(s)
- Tomasz Boczek
- Department of Molecular Neurochemistry, Medical University, Mazowiecka 6/8 Str., 92-215 Lodz, Poland; Boston Children's Hospital and Harvard Medical School, 300 Longwood Ave, Boston, MA 02115, USA.
| | - Malwina Lisek
- Department of Molecular Neurochemistry, Medical University, Mazowiecka 6/8 Str., 92-215 Lodz, Poland
| | - Bozena Ferenc
- Department of Molecular Neurochemistry, Medical University, Mazowiecka 6/8 Str., 92-215 Lodz, Poland
| | - Ludmila Zylinska
- Department of Molecular Neurochemistry, Medical University, Mazowiecka 6/8 Str., 92-215 Lodz, Poland
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17
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Manocha GD, Ghatak A, Puig KL, Kraner SD, Norris CM, Combs CK. NFATc2 Modulates Microglial Activation in the AβPP/PS1 Mouse Model of Alzheimer's Disease. J Alzheimers Dis 2017; 58:775-787. [PMID: 28505967 PMCID: PMC6265241 DOI: 10.3233/jad-151203] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Alzheimer's disease (AD) brains are characterized by fibrillar amyloid-β (Aβ) peptide containing plaques and associated reactive microglia. The proinflammatory phenotype of the microglia suggests that they may negatively affect disease course and contribute to behavioral decline. This hypothesis predicts that attenuating microglial activation may provide benefit against disease. Prior work from our laboratory and others has characterized a role for the transcription factor, nuclear factor of activated T cells (NFAT), in regulating microglial phenotype in response to different stimuli, including Aβ peptide. We observed that the NFATc2 isoform was the most highly expressed in murine microglia cultures, and inhibition or deletion of NFATc2 was sufficient to attenuate the ability of the microglia to secrete cytokines. In order to determine whether the NFATc2 isoform, in particular, was a valid immunomodulatory target in vivo, we crossed an NFATc2-/- line to a well-known AD mouse model, an AβPP/PS1 mouse line. As expected, the AβPP/PS1 x NFATc2-/- mice had attenuated cytokine levels compared to AβPP/PS1 mice as well as reduced microgliosis and astrogliosis with no effect on plaque load. Although some species differences in relative isoform expression may exist between murine and human microglia, it appears that microglial NFAT activity is a viable target for modulating the proinflammatory changes that occur during AD.
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Affiliation(s)
- Gunjan D. Manocha
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
| | - Atreyi Ghatak
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
| | - Kendra L. Puig
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
| | - Susan D. Kraner
- Department of Pharmacology and Nutritional Sciences and the Sanders Brown Center on Aging, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Christopher M. Norris
- Department of Pharmacology and Nutritional Sciences and the Sanders Brown Center on Aging, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Colin K. Combs
- Department of Biomedical Sciences, University of North Dakota School of Medicine and Health Sciences, Grand Forks, ND, USA
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KRAS mutation leads to decreased expression of regulator of calcineurin 2, resulting in tumor proliferation in colorectal cancer. Oncogenesis 2016; 5:e253. [PMID: 27526107 PMCID: PMC5007825 DOI: 10.1038/oncsis.2016.47] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 05/07/2016] [Accepted: 05/30/2016] [Indexed: 12/22/2022] Open
Abstract
KRAS mutations occur in 30–40% of all cases of human colorectal cancer (CRC). However, to date, specific therapeutic agents against KRAS-mutated CRC have not been developed. We previously described the generation of mouse models of colon cancer with and without Kras mutations (CDX2P-G22Cre;Apcflox/flox; LSL-KrasG12D and CDX2P-G22Cre;Apcflox/flox mice, respectively). Here, the two mouse models were compared to identify candidate genes, which may represent novel therapeutic targets or predictive biomarkers. Differentially expressed genes in tumors from the two mouse models were identified using microarray analysis, and their expression was compared by quantitative reverse transcription–PCR (qRT–PCR) and immunohistochemical analyses in mouse tumors and surgical specimens of human CRC, with or without KRAS mutations, respectively. Furthermore, the functions of candidate genes were studied using human CRC cell lines. Microarray analysis of 34 000 transcripts resulted in the identification of 19 candidate genes. qRT–PCR analysis data showed that four of these candidate genes (Clps, Irx5, Bex1 and Rcan2) exhibited decreased expression in the Kras-mutated mouse model. The expression of the regulator of calcineurin 2 (RCAN2) was also observed to be lower in KRAS-mutated human CRC. Moreover, inhibitory function for cancer cell proliferation dependent on calcineurin was indicated with overexpression and short hairpin RNA knockdown of RCAN2 in human CRC cell lines. KRAS mutations in CRC lead to a decrease in RCAN2 expression, resulting in tumor proliferation due to derepression of calcineurin–nuclear factor of activated T cells (NFAT) signaling. Our findings suggest that calcineurin–NFAT signal may represent a novel molecular target for the treatment of KRAS-mutated CRC.
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Niitsu H, Hinoi T, Sentani K, Mukai S, Adachi T, Saito Y, Miguchi M, Kochi M, Sada H, Oue N, Yasui W, Ohdan H. Increased Calcineurin A Expression Is Associated with a Lower Relapse-Free Survival Rate after Colorectal Cancer Surgery. Pathobiology 2016; 83:308-15. [PMID: 27322036 DOI: 10.1159/000445121] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 03/01/2016] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Increased expression of calcineurin in colorectal cancer (CRC) has been reported. Although the oncogenic function has been suggested, the clinical relevance is still unclear. We herein studied calcineurin expression as a prognostic biomarker in patients receiving curative surgery for stages I-III CRC. METHODS In 121 patients with stages I-III CRC treated at Hiroshima University between 1997 and 2003, calcineurin A expression was examined using immunohistochemistry (IHC) staining of surgical specimens. Specimens were considered positive for calcineurin A if any IHC-stained cells were observed within the carcinomatous area, and clinicopathological characteristics and survival outcomes were compared between IHC-positive and -negative groups. RESULTS Calcineurin A was preferentially expressed in the cytoplasm of cancer cells, and a median of 8% of the cells (range: 0-80%; interquartile range: 0-22.5%) were stained within the carcinomatous areas. Of 121 cases, 81 were determined as IHC positive while 40 were determined to be negative. Positive expression of calcineurin A, as well UICC-TNM stage, was associated with low relapse-free survival (RFS) rates in multivariate analyses (hazard ratio = 2.92; 95% CI: 1.27-7.92; p = 0.010). CONCLUSION Increased calcineurin A expression is associated with lower RFS rates and may have clinical value in predicting recurrence.
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Affiliation(s)
- Hiroaki Niitsu
- Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Hiroshima University, Hiroshima, Japan
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20
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Gao S, Li W, Lin G, Liu G, Deng W, Zhai C, Bian C, He G, Hu Z. Norisoboldine, an alkaloid from Radix linderae, inhibits NFAT activation and attenuates 2,4-dinitrofluorobenzene-induced dermatitis in mice. Immunopharmacol Immunotoxicol 2016; 38:327-33. [PMID: 27315014 DOI: 10.1080/08923973.2016.1202961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
CONTEXT The nuclear factor of activated T-cells (NFAT) is a family of transcription factors, essential for T-cell activation. Norisoboldine (NOR), an isoquinoline alkaloid from Radix linderae, has been demonstrated to possess anti-inflammatory activity. OBJECTIVE This study examines NOR's effect on NFAT activation and its therapeutic potential for atopic dermatitis (AD). MATERIALS AND METHODS The transcriptional activity of NFAT was examined with luciferase reporter assay, using K562-luc cells, stimulated with 20 ng/mL PMA plus 1 μM ionomycin. NFAT dephosphorylation was examined by immuno-blotting in K562-luc cells and Jurkat cells. Interleukin-2 (IL-2) expression in Jurkat cells was examined by real-time PCR. A mouse model of dermatitis, induced by 2,4-dinitrochlorobenzene (DNCB), was used to test NOR's therapeutic potential for AD. RESULTS NOR, dose-dependently, inhibited PMA and ionomycin-induced NFAT reporter gene expression in K562-luc cells in the range of 2-50 μM. NOR also inhibited PMA and ionomycin-induced NFAT dephosphorylation in K562-luc cells and Jurkat cells. Consequently, NOR suppressed PMA plus ionomycin-induced IL-2 expression in Jurkat cells. The administration of NOR (10 mg/kg, i.p.), alleviated DNCB-induced dermatitis in mice, by the reduction of ear swelling and attenuation of inflammatory infiltration into ear tissue. Moreover, mRNA levels of INF-γ, TNF-α, IL-4 and IL-6 in ears of NOR-treated mice were reduced by 78.4, 77.8, 72.3 and 73.9%, respectively, compared with untreated controls. DISCUSSION AND CONCLUSION This study demonstrates that NOR inhibits NFAT activation in T-cells and alleviates AD-like inflammatory reaction in a DNCB-induced dermatitis model, highlighting NOR as a potential therapeutic agent for AD.
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Affiliation(s)
- Shuang Gao
- a Department of Biochemical Pharmacy, School of Pharmacy , Second Military Medical University , Shanghai , China
| | - Wencai Li
- a Department of Biochemical Pharmacy, School of Pharmacy , Second Military Medical University , Shanghai , China
| | - Guochao Lin
- a Department of Biochemical Pharmacy, School of Pharmacy , Second Military Medical University , Shanghai , China
| | | | - Wenjuan Deng
- b Infinitus (China) Company Ltd , Guangzhou , China
| | | | | | - Gaiying He
- c Shanghai LB Nature Co. Ltd , Shanghai , China
| | - Zhenlin Hu
- a Department of Biochemical Pharmacy, School of Pharmacy , Second Military Medical University , Shanghai , China
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21
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Taylor A, Harker JA, Chanthong K, Stevenson PG, Zuniga EI, Rudd CE. Glycogen Synthase Kinase 3 Inactivation Drives T-bet-Mediated Downregulation of Co-receptor PD-1 to Enhance CD8(+) Cytolytic T Cell Responses. Immunity 2016; 44:274-86. [PMID: 26885856 PMCID: PMC4760122 DOI: 10.1016/j.immuni.2016.01.018] [Citation(s) in RCA: 123] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 05/12/2015] [Accepted: 11/11/2015] [Indexed: 01/22/2023]
Abstract
Despite the importance of the co-receptor PD-1 in T cell immunity, the upstream signaling pathway that regulates PD-1 expression has not been defined. Glycogen synthase kinase 3 (GSK-3, isoforms α and β) is a serine-threonine kinase implicated in cellular processes. Here, we identified GSK-3 as a key upstream kinase that regulated PD-1 expression in CD8(+) T cells. GSK-3 siRNA downregulation, or inhibition by small molecules, blocked PD-1 expression, resulting in increased CD8(+) cytotoxic T lymphocyte (CTL) function. Mechanistically, GSK-3 inactivation increased Tbx21 transcription, promoting enhanced T-bet expression and subsequent suppression of Pdcd1 (encodes PD-1) transcription in CD8(+) CTLs. Injection of GSK-3 inhibitors in mice increased in vivo CD8(+) OT-I CTL function and the clearance of murine gamma-herpesvirus 68 and lymphocytic choriomeningitis clone 13 and reversed T cell exhaustion. Our findings identify GSK-3 as a regulator of PD-1 expression and demonstrate the applicability of GSK-3 inhibitors in the modulation of PD-1 in immunotherapy.
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Affiliation(s)
- Alison Taylor
- Cell Signalling Section, Division of Immunology, Department of Pathology, Tennis Court Road, University of Cambridge, Cambridge CB2 1QP, UK
| | - James A Harker
- Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Kittiphat Chanthong
- Cell Signalling Section, Division of Immunology, Department of Pathology, Tennis Court Road, University of Cambridge, Cambridge CB2 1QP, UK
| | - Philip G Stevenson
- Division of Virology, Department of Pathology, University of Cambridge, Cambridge CB2 2QQ, UK
| | - Elina I Zuniga
- Division of Biological Sciences, University of California San Diego, La Jolla, CA 92093, USA
| | - Christopher E Rudd
- Cell Signalling Section, Division of Immunology, Department of Pathology, Tennis Court Road, University of Cambridge, Cambridge CB2 1QP, UK.
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Liu XP, Gao H, Huang XY, Chen YF, Feng XJ, He YH, Li ZM, Liu PQ. Peroxisome proliferator-activated receptor gamma coactivator 1 alpha protects cardiomyocytes from hypertrophy by suppressing calcineurin-nuclear factor of activated T cells c4 signaling pathway. Transl Res 2015; 166:459-473.e3. [PMID: 26118953 DOI: 10.1016/j.trsl.2015.06.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 05/21/2015] [Accepted: 06/02/2015] [Indexed: 01/11/2023]
Abstract
Peroxisome proliferator-activated receptor gamma coactivator 1 alpha (PGC-1α) is a crucial coregulator interacting with multiple transcriptional factors in the regulation of cardiac hypertrophy. The present study revealed that PGC-1α protected cardiomyocytes from hypertrophy by suppressing calcineurin-nuclear factor of activated T cells c4 (NFATc4) signaling pathway. Overexpression of PGC-1α by adenovirus infection prevented the increased protein and messenger RNA expression of NFATc4 in phenylephrine (PE)-treated hypertrophic cardiomyocytes, whereas knockdown of PGC-1α by RNA silencing augmented the expression of NFATc4. An interaction between PGC-1α and NFATc4 was observed in both the cytoplasm and nucleus of neonatal rat cardiomyocytes. Adenovirus PGC-1α prevented the nuclear import of NFATc4 and increased its phosphorylation level of NFATc4, probably through repressing the expression and activity of calcineurin and interfering with the interaction between calcineurin and NFATc4. On the contrary, PGC-1α silencing aggravated PE-induced calcineurin activation, NFATc4 dephosphorylation, and nuclear translocation. Moreover, the binding activity and transcription activity of NFATc4 to DNA promoter of brain natriuretic peptide were abrogated by PGC-1α overexpression but were enhanced by PGC-1α knockdown. The effect of PGC-1α on suppressing the calcinuerin-NFATc4 signaling pathway might at least partially contribute to the protective effect of PGC-1α on cardiomyocyte hypertrophy. These findings provide novel insights into the role of PGC-1α in regulation of cardiac hypertrophy.
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Affiliation(s)
- Xue-Ping Liu
- Department of Pharmacology and Toxicology, School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, PR China
| | - Hui Gao
- Department of Pharmacology and Toxicology, School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, PR China; Department of Pharmacology, School of Medicine, Jishou University, Jishou, PR China
| | - Xiao-Yang Huang
- Department of Pharmacology and Toxicology, School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, PR China
| | - Yan-Fang Chen
- Department of Pharmacy, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, PR China
| | - Xiao-Jun Feng
- Department of Pharmacology and Toxicology, School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, PR China
| | - Yan-Hong He
- Department of Pharmacology and Toxicology, School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, PR China
| | - Zhuo-Ming Li
- Department of Pharmacology and Toxicology, School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, PR China.
| | - Pei-Qing Liu
- Department of Pharmacology and Toxicology, School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou, PR China.
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Geng X, Yang L, Zhang C, Qin H, Liang Q. Wogonin inhibits osteoclast differentiation by inhibiting NFATc1 translocation into the nucleus. Exp Ther Med 2015; 10:1066-1070. [PMID: 26622440 DOI: 10.3892/etm.2015.2615] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 06/02/2015] [Indexed: 01/21/2023] Open
Abstract
The aim of the present study was to identify a natural product with the ability to inhibit nuclear factor of activated T cells c1 (NFATc1) translocation from the cytoplasm to the nucleus by high-throughput screening, and to investigate the effect of the natural product upon osteoclast differentiation and its underlying mechanism. An NFATc1 antagonist redistribution assay was performed in U2OS-NFATc1 cells against a natural product library, and Wogonin was found to have the ability to inhibit the NFATc1 translocation from the cytoplasm to the nucleus. The effect of Wogonin on NFATc1 transcription activation was further determined by luciferase assay. An osteoclast differentiation assay was executed to evaluate the effect of Wogonin on osteoclast differentiation. The effect of Wogonin upon the vital genes in osteoclast differentiation was investigated using fluorescent quantitative polymerase chain reaction analysis. The natural product Wogonin significantly inhibited the translocation of NFATc1 from the cytoplasm to the nucleus and its transcriptional activation activity. Wogonin also significantly inhibited osteoclast differentiation and decreased the transcription of osteoclast-associated immunoglobulin-like receptor, tartrate-resistant acid phosphatase and calcitonin receptor. In conclusion, the natural product Wogonin inhibited osteoclast differentiation through the inhibition of NFATc1 translocation from the cytoplasm to the nucleus, and thus the downregulation of genes associated with osteoclast differentiation, which marked Wogonin as a potential treatment for osteoporosis.
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Affiliation(s)
- Xiaolin Geng
- Department of Orthopedic Surgery I, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Libin Yang
- Department of Orthopedic Surgery I, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Chao Zhang
- Department of Orthopedic Surgery I, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Hua Qin
- Department of Orthopedic Surgery I, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
| | - Qiudong Liang
- Department of Orthopedic Surgery I, The First Affiliated Hospital of Xinxiang Medical University, Weihui, Henan 453100, P.R. China
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Disease relevance of T11TS-induced T-cell signal transduction through the CD2-mediated calcineurin-NFAT pathway: Perspectives in glioma immunotherapy. Mol Immunol 2015; 67:256-64. [PMID: 26105805 DOI: 10.1016/j.molimm.2015.06.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 05/31/2015] [Accepted: 06/01/2015] [Indexed: 11/21/2022]
Abstract
Malignant glioma is the most lethal of a wide array of CNS neoplasms. Its onset and progression are markedly associated with profound immunosupression and paralysis of T-cell survival and proliferation. Myriad immunotherapeutic strategies are presently used to target such T-cell anomalies in glioma. Our recent work has highlighted use of the novel glycopeptide, the CD2 ligand, T11 target structure (T11TS) as an immunotherapeutic agent against experimentally induced glioma in rats. We have shown that T11TS causes multi-target modulation of key components of the T-cell - antigen presenting cell (APC) immunological synapse. This consequently triggers T-cell activation so as to reverse glioma-induced changes to physiological levels. T11TS administration also causes CD2 upregulation. Earlier we also found T11TS to cause enhanced proliferation of both CD4+ and CD8+ T-cells in glioma conditions. These findings led us to believe that downstream CD2-stimulated "alternative pathway" of calcineurin-NFAT could be a possible target for modulation by T11TS. In the present paper we thus show that immunotherapy with T11TS induces a multi-targeted approach towards activation of this "alternative pathway" of T-cell signaling providing an immunotherapeutic advantage against glioma. We show here that T11TS immunotherapy causes positive modulations of the CD2 pathway-associated proteins, viz., p59fyn, protein kinase C-θ (PKC-θ), calcineurin and nuclear factor for activation of T-cells (NFAT) and hint that this may accord greater survival and proliferation advantage to T-cells of the glioma-bearing animals for augmented defence against glioma. These findings help open a molecular immunotherapeutic door - one which is directed towards clinical studies for glioma-immunotherapy using T11TS.
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Carter JJ, Wheal AJ, Hill SJ, Woolard J. Effects of receptor tyrosine kinase inhibitors on VEGF165 a- and VEGF165 b-stimulated gene transcription in HEK-293 cells expressing human VEGFR2. Br J Pharmacol 2015; 172:3141-50. [PMID: 25684635 PMCID: PMC4459029 DOI: 10.1111/bph.13116] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 01/25/2015] [Accepted: 02/10/2015] [Indexed: 01/03/2023] Open
Abstract
Background and Purpose Receptor tyrosine kinase inhibitors (RTKIs) targeted at VEGF receptor 2 (VEGFR2) have proved to be attractive approaches to cancer therapy based on their ability to reduce angiogenesis. Here we have undertaken a quantitative analysis of the interaction of RTKIs and two VEGF splice variants, VEGF165a and VEGF165b, with VEGFR2 by studying nuclear factor of activated T-cells (NFAT) reporter gene activity in live HEK-293 cells. Experimental Approach HEK-293 cells expressing the human VEGFR2 and a firefly luciferase reporter gene regulated by an NFAT response element were used for quantitative analysis of the effect of RTKIs on VEGF165a- and VEGF165b-stimulated luciferase gene expression. Key Results VEGF165a produced a concentration-dependent activation of the NFAT-luciferase reporter gene in living cells that was inhibited in a non-competitive fashion by four different RTKIs (cediranib, pazopanib, sorafenib and vandetanib). The potency obtained for each RTKI from this analysis was similar to those obtained in binding studies using purified VEGFR2 kinase domains. VEGF165b was a lower-efficacy agonist of the NFAT-luciferase response when compared with VEGF165a. Analysis of the concentration–response data using the operational model of agonism indicated that both VEGF165 isoforms had similar affinity for VEGFR2. Conclusions and Implications Quantitative pharmacological analysis of the interaction of VEGF165 isoforms and RTKIs with VEGFR2 in intact living cells has provided important insights into the relative affinity and efficacy of VEGF165a and VEGF165b for activation of the calcineurin- NFAT signalling pathway by this tyrosine kinase receptor.
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Affiliation(s)
- Joanne J Carter
- Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Amanda J Wheal
- Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Stephen J Hill
- Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Jeanette Woolard
- Cell Signalling Research Group, School of Life Sciences, University of Nottingham, Nottingham, UK
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Rojanathammanee L, Floden AM, Manocha GD, Combs CK. Attenuation of microglial activation in a mouse model of Alzheimer's disease via NFAT inhibition. J Neuroinflammation 2015; 12:42. [PMID: 25889879 PMCID: PMC4355356 DOI: 10.1186/s12974-015-0255-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 01/25/2015] [Indexed: 12/21/2022] Open
Abstract
Background Amyloid β (Aβ) peptide is hypothesized to stimulate microglia to acquire their characteristic proinflammatory phenotype in Alzheimer’s disease (AD) brains. The specific mechanisms by which Aβ leads to microglial activation remain an area of interest for identifying attractive molecular targets for intervention. Based upon the fact that microglia express the proinflammatory transcription factor, nuclear factor of activated T cells (NFAT), we hypothesized that NFAT activity is required for the Aβ-stimulated microgliosis that occurs during disease. Methods Primary murine microglia cultures were stimulated with Aβ in the absence or presence of NFAT inhibitors, FK506 and tat-VIVIT peptide, to quantify secretion of cytokines, neurotoxins, or Aβ phagocytosis. A transgenic mouse model of AD, APP/PS1, was treated subcutaneously via mini-osmotic pumps with FK506 or tat-VIVIT to quantify effects on cytokines, microgliosis, plaque load, and memory. Results Expression of various NFAT isoforms was verified in primary murine microglia through Western blot analysis. Microglial cultures were stimulated with Aβ fibrils in the absence or presence of the NFAT inhibitors, FK506 and tat-VIVIT, to demonstrate that NFAT activity regulated Aβ phagocytosis, neurotoxin secretion, and cytokine secretion. Delivery of FK506 and tat-VIVIT to transgenic APP/PS1 mice attenuated spleen but not brain cytokine levels. However, FK506 and tat-VIVIT significantly attenuated both microgliosis and Aβ plaque load in treated mice compared to controls. Surprisingly, this did not correlate with changes in memory performance via T-maze testing. Conclusions Our findings suggest that development of specific NFAT inhibitors may offer promise as an effective strategy for attenuating the microgliosis and Aβ plaque deposition that occur in AD. Electronic supplementary material The online version of this article (doi:10.1186/s12974-015-0255-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Lalida Rojanathammanee
- Institute of Science, Suranaree University of Technology, 111 University Avenue, Suranaree Subdistric, Nakhon Ratchasima, 30000, Thailand. .,Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, 504 Hamline Street, Neuroscience Building, Grand Forks, ND, 58203, USA.
| | - Angela M Floden
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, 504 Hamline Street, Neuroscience Building, Grand Forks, ND, 58203, USA.
| | - Gunjan D Manocha
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, 504 Hamline Street, Neuroscience Building, Grand Forks, ND, 58203, USA.
| | - Colin K Combs
- Department of Basic Sciences, University of North Dakota School of Medicine and Health Sciences, 504 Hamline Street, Neuroscience Building, Grand Forks, ND, 58203, USA.
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Abstract
Probiotic organisms are claimed to offer several functional properties including stimulation of immune system. This review is presented to provide detailed informations about how probiotics stimulate our immune system. Lactobacillus rhamnosus GG, Lactobacillus casei Shirota, Bifidobacterium animalis Bb-12, Lactobacillus johnsonii La1, Bifidobacterium lactis DR10, and Saccharomyces cerevisiae boulardii are the most investigated probiotic cultures for their immunomodulation properties. Probiotics can enhance nonspecific cellular immune response characterized by activation of macrophages, natural killer (NK) cells, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in strain-specific and dose-dependent manner. Mixture and type (gram-positive and gram-negative) of probiotic organisms may induce different cytokine responses. Supplementation of probiotic organisms in infancy could help prevent immune-mediated diseases in childhood, whereas their intervention in pregnancy could affect fetal immune parameters, such as cord blood interferon (IFN)-γ levels, transforming growth factor (TGF)-β1 levels, and breast milk immunoglobulin (Ig)A. Probiotics that can be delivered via fermented milk or yogurt could improve the gut mucosal immune system by increasing the number of IgA(+) cells and cytokine-producing cells in the effector site of the intestine.
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Affiliation(s)
- Rabia Ashraf
- a Faculty of Health Engineering and Science, School of Biomedical and Health Sciences , Victoria University , Werribee Campus, P.O. Box 14428 , Melbourne , Victoria , 8001 , Australia
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Liu X, Zhao Q, Peng X, Xia S, Shen W, Zong Y, Cheng J, Wu W, Zhang M, Du F, Xu W, Qian H, Shao Q. PTD-mediated intracellular delivery of mutant NFAT minimum DNA binding domain inhibited the proliferation of T cells. Int Immunopharmacol 2014; 19:110-8. [DOI: 10.1016/j.intimp.2014.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 12/31/2013] [Accepted: 01/03/2014] [Indexed: 12/01/2022]
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Rojanathammanee L, Puig KL, Combs CK. Pomegranate polyphenols and extract inhibit nuclear factor of activated T-cell activity and microglial activation in vitro and in a transgenic mouse model of Alzheimer disease. J Nutr 2013; 143:597-605. [PMID: 23468550 PMCID: PMC3738232 DOI: 10.3945/jn.112.169516] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Alzheimer disease (AD) brain is characterized by extracellular plaques of amyloid β (Aβ) peptide with reactive microglia. This study aimed to determine whether a dietary intervention could attenuate microgliosis. Memory was assessed in 12-mo-old male amyloid precursor protein/presenilin 1 (APP/PS1) transgenic mice via Barnes maze testing followed by division into either a control-fed group provided free access to normal chow and water or a treatment group provided free access to normal chow and drinking water supplemented with pomegranate extract (6.25 mL/L) for 3 mo followed by repeat Barnes maze testing for both groups. Three months of pomegranate feeding decreased the path length to escape of mice compared with their initial 12-mo values (P < 0.05) and their control-fed counterparts (P < 0.05). Brains of the 3-mo study pomegranate-fed mice had lower tumor necrosis factor α (TNF-α) concentrations (P < 0.05) and lower nuclear factor of activated T-cell (NFAT) transcriptional activity (P < 0.05) compared with controls. Brains of the 3-mo pomegranate or control mice were also compared with an additional control group of 12-mo-old mice for histologic analysis. Immunocytochemistry showed that pomegranate- but not control-fed mice had attenuated microgliosis (P < 0.05) and Aβ plaque deposition (P < 0.05) compared with 12-mo-old mice. An additional behavioral study again used 12-mo-old male APP/PS1 mice tested by T-maze followed by division into a control group provided with free access to normal chow and sugar supplemented drinking water or a treatment group provided with normal chow and pomegranate extract-supplemented drinking water (6.25 mL/L) for 1 mo followed by repeat T-maze testing in both groups. One month of pomegranate feeding increased spontaneous alternations versus control-fed mice (P < 0.05). Cell culture experiments verified that 2 polyphenol components of pomegranate extract, punicalagin and ellagic acid, attenuated NFAT activity in a reporter cell line (P < 0.05) and decreased Aβ-stimulated TNF-α secretion by murine microglia (P < 0.05). These data indicate that dietary pomegranate produces brain antiinflammatory effects that may attenuate AD progression.
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Lodygin D, Odoardi F, Schläger C, Körner H, Kitz A, Nosov M, van den Brandt J, Reichardt HM, Haberl M, Flügel A. A combination of fluorescent NFAT and H2B sensors uncovers dynamics of T cell activation in real time during CNS autoimmunity. Nat Med 2013; 19:784-90. [PMID: 23624600 DOI: 10.1038/nm.3182] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Accepted: 10/16/2012] [Indexed: 01/21/2023]
Abstract
Multiple sclerosis is an autoimmune disease of the central nervous system (CNS) that is initiated when self-reactive T cells enter the brain and become locally activated after encountering their specific nervous antigens. When and where the disease-relevant antigen encounters occur is unclear. Here we combined fluorescently labeled nuclear factor of activated T cells (NFAT) with histone protein H2B to create a broadly applicable molecular sensor for intravital imaging of T cell activation. In experimental autoimmune encephalomyelitis, an animal model for multiple sclerosis, we report that effector T cells entering the CNS become activated after short contacts with leptomeningeal phagocytes. During established disease, the activation process is extended to the depth of the CNS parenchyma, where the cells form contacts with microglia and recruited phagocytes. We show that it is the activation processes during the preclinical phase rather than during established disease that are essential for the intensity and duration of the disease bout.
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Affiliation(s)
- Dmitri Lodygin
- Institute for Multiple Sclerosis Research and Department of Neuroimmunology, Gemeinnützige Hertie-Stiftung and University Medical Center Göttingen, Göttingen, Germany
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31
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Singh RS, Walia AK. Microbial lectins and their prospective mitogenic potential. Crit Rev Microbiol 2012; 40:329-47. [DOI: 10.3109/1040841x.2012.733680] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Key signalling factors and pathways in the molecular determination of skeletal muscle phenotype. Animal 2012; 1:681-98. [PMID: 22444469 DOI: 10.1017/s1751731107702070] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The molecular basis and control of the biochemical and biophysical properties of skeletal muscle, regarded as muscle phenotype, are examined in terms of fibre number, fibre size and fibre types. A host of external factors or stimuli, such as ligand binding and contractile activity, are transduced in muscle into signalling pathways that lead to protein modifications and changes in gene expression which ultimately result in the establishment of the specified phenotype. In skeletal muscle, the key signalling cascades include the Ras-extracellular signal regulated kinase-mitogen activated protein kinase (Erk-MAPK), the phosphatidylinositol 3'-kinase (PI3K)-Akt1, p38 MAPK, and calcineurin pathways. The molecular effects of external factors on these pathways revealed complex interactions and functional overlap. A major challenge in the manipulation of muscle of farm animals lies in the identification of regulatory and target genes that could effect defined and desirable changes in muscle quality and quantity. To this end, recent advances in functional genomics that involve the use of micro-array technology and proteomics are increasingly breaking new ground in furthering our understanding of the molecular determinants of muscle phenotype.
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Abstract
Organ transplantation is the state of the art for treating end-stage organ failure. Over 25000 organ transplants are performed in the USA each year. Survival rates following transplantation are now approaching 90% for 1 year and 75% for 5 years. Central to this success was the introduction of drugs that suppress the immune system and prevent rejection. The most commonly used class of immunosuppressing drugs are calcineurin inhibitors (CNIs). Calcineurin is a ubiquitous enzyme that is important for T-cell function. With more people taking CNIs for longer and longer periods of time the consequences of calcineurin inhibition on other organ systems - particularly the kidney - have become a growing concern. Virtually all people who take a CNI will develop some degree of kidney toxicity and up to 10% will progress to kidney failure. In the past 15 years, research into calcineurin action has identified distinct actions of the two main isoforms of the catalytic subunit of the enzyme. The α-isoform is required for kidney function whereas the β-isoform has a predominant role in the immune system. This review will discuss the current state of knowledge about calcineurin isoforms and how these new insights may reshape post-transplant immunosuppression.
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Chen ZL, Zhao SH, Wang Z, Qiu B, Li BZ, Zhou F, Tan XG, He J. Expression and unique functions of four nuclear factor of activated T cells isoforms in non-small cell lung cancer. CHINESE JOURNAL OF CANCER 2012; 30:62-8. [PMID: 21192845 PMCID: PMC4012264 DOI: 10.5732/cjc.010.10156] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Nuclear factor of activated T cells (NFAT) is an important family of transcription factors that can be activated by calmodulin and calcineurin in human cells. To investigate the expression and clinical significance of NFAT isoforms and calcineurin in non-small cell lung cancer (NSCLC), we collected tumor and adjacent normal tissues from 159 NSCLC patients and assembled them in a tissue microarray. Protein levels of NFAT1, NFAT2, NFAT3, NFAT4, and calcineurin were determined using immunohistochemistry. Correlations between NFAT and calcineurin expression and clinicopathologic characteristics were analyzed. We found that the positive rates of NFAT1 (52.8%, 84/159), NFAT2 (11.3%, 18/159), NFAT3 (28.3%, 45/ 159), NFAT4 (47.2%, 75/159), and calcineurin (47.8%, 76/159) expression were significantly higher in tumor tissues than in adjacent normal lung tissues (P < 0.001), respectively. The positive rate of NFAT1 expression was significantly higher in patients with adenocarcinoma (63.5%, 47/74) than in those with squamous cell carcinoma (43.5%, 37/85) (χ2 = 6.340, P = 0.012); with lymph node metastasis (61.6%, 53/ 86) than without lymph node metastasis (42.5%, 31/73) (χ2 = 5.818, P = 0.016); and with stage-ll and -III diseases (61.8%, 55/89) than with stage-I disease (41.4%, 29/70) (χ2 = 6.524, P = 0.011). Moreover, the overexpression of NFAT1 was associated with poor survival of NSCLC patients (χ2 = 5.006, P = 0.025). The positive rate of NFAT4 was significantly higher in patients with squamous carcinoma (57.6%, 49/85) than in those with adenocarcinoma (35.1%, 26/74) (χ2 = 8.045, P = 0.005) and with high and moderate differentiation (54.9%, 61/111) than with low differentiation (29.2%, 14/48) (χ2 = 8.943, P = 0.003). Calcineurin overexpression was significantly associated with histologic type (higher in squamous carcinoma than in adenocarcinoma, χ2 = 8.897, P = 0.003), differentiation grade (higher in high-moderation grade than in low grade, χ2 = 9.566, P = 0.002) and gender (higher in male than in female, χ2 = 5.766, P = 0.016). Furthermore, calcineurin expression was significantly correlated with NFAT4 level (r = 0.429, P < 0.001). These results suggest that NFAT1 expression is associated with lung adenocarcinoma progression, and NFAT4 expression, which was higher in squamous lung cancer, is associated with calcineurin expression and differentiation grade.
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Affiliation(s)
- Zhao-Li Chen
- Department of Thoracic Surgery, Cancer Institute and Hospital, Chinese Academy of Medical Sciences, Beijing 100021, PR China
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Maine CJ, Hamilton-Williams EE, Cheung J, Stanford SM, Bottini N, Wicker LS, Sherman LA. PTPN22 alters the development of regulatory T cells in the thymus. THE JOURNAL OF IMMUNOLOGY 2012; 188:5267-75. [PMID: 22539785 DOI: 10.4049/jimmunol.1200150] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
PTPN22 encodes a tyrosine phosphatase that inhibits Src-family kinases responsible for Ag receptor signaling in lymphocytes and is strongly linked with susceptibility to a number of autoimmune diseases. As strength of TCR signal is critical to the thymic selection of regulatory T cells (Tregs), we examined the effect of murine PTPN22 deficiency on Treg development and function. In the thymus, numbers of pre-Tregs and Tregs increased inversely with the level of PTPN22. This increase in Tregs persisted in the periphery and could play a key part in the reduced severity observed in the PTPN22-deficient mice of experimental autoimmune encephalomyelitis, a mouse model of multiple sclerosis. This could explain the lack of association of certain autoimmune conditions with PTPN22 risk alleles.
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Affiliation(s)
- Christian J Maine
- Department of Immunology and Microbial Sciences, The Scripps Research Institute, La Jolla, CA 92037, USA
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Uropathogenic E. coli induce different immune response in testicular and peritoneal macrophages: implications for testicular immune privilege. PLoS One 2011; 6:e28452. [PMID: 22164293 PMCID: PMC3229579 DOI: 10.1371/journal.pone.0028452] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 11/08/2011] [Indexed: 01/13/2023] Open
Abstract
Infertility affects one in seven couples and ascending bacterial infections of the male genitourinary tract by Escherichia coli are an important cause of male factor infertility. Thus understanding mechanisms by which immunocompetent cells such as testicular macrophages (TM) respond to infection and how bacterial pathogens manipulate defense pathways is of importance. Whole genome expression profiling of TM and peritoneal macrophages (PM) infected with uropathogenic E. coli (UPEC) revealed major differences in regulated genes. However, a multitude of genes implicated in calcium signaling pathways was a common feature which indicated a role of calcium-dependent nuclear factor of activated T cells (NFAT) signaling. UPEC-dependent NFAT activation was confirmed in both cultured TM and in TM in an in vivo UPEC infectious rat orchitis model. Elevated expression of NFATC2-regulated anti-inflammatory cytokines was found in TM (IL-4, IL-13) and PM (IL-3, IL-4, IL-13). NFATC2 is activated by rapid influx of calcium, an activity delineated to the pore forming toxin alpha-hemolysin by bacterial mutant analysis. Alpha-hemolysin suppressed IL-6 and TNF-α cytokine release from PM and caused differential activation of MAP kinase and AP-1 signaling pathways in TM and PM leading to reciprocal expression of key pro-inflammatory cytokines in PM (IL-1α, IL-1β, IL-6 downregulated) and TM (IL-1β, IL-6 upregulated). In addition, unlike PM, LPS-treated TM were refractory to NFκB activation shown by the absence of degradation of IκBα and lack of pro-inflammatory cytokine secretion (IL-6, TNF-α). Taken together, these results suggest a mechanism to the conundrum by which TM initiate immune responses to bacteria, while maintaining testicular immune privilege with its ability to tolerate neo-autoantigens expressed on developing spermatogenic cells.
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Gurda GT, Wang JY, Guo L, Ernst SA, Williams JA. Profiling CCK-mediated pancreatic growth: the dynamic genetic program and the role of STATs as potential regulators. Physiol Genomics 2011; 44:14-24. [PMID: 22010007 DOI: 10.1152/physiolgenomics.00255.2010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Feeding mice with protease inhibitor (PI) leads to increased endogenous cholecystokinin (CCK) release and results in pancreatic growth. This adaptive response requires calcineurin (CN)-NFAT and AKT-mTOR pathways, but the genes involved, the dynamics of their expression, and other regulatory pathways remain unknown. Here, we examined the early (1-8 h) transcriptional program that underlies pancreatic growth. We found 314 upregulated and 219 downregulated genes with diverse temporal and functional profiles. Several new identifications include the following: stress response genes Gdf15 and Txnip, metabolic mediators Pitpnc1 and Hmges2, as well as components of growth factor response Fgf21, Atf3, and Egr1. The genes fell into seven self-organizing clusters, each with a distinct pattern of expression; a representative gene within each of the upregulated clusters (Egr1, Gadd45b, Rgs2, and Serpinb1a) was validated by qRT-PCR. Genes up at any point throughout the time course and CN-dependent genes were subjected to further bioinformatics-based networking and promoter analysis, yielding STATs as potential transcriptional regulators. As shown by PCR, qPCR, and Western blots, the active phospho-form of STAT3 and the Jak-STAT feedback inhibitor Socs2 were both increased throughout early pancreatic growth. Moreover, immunohistochemistry showed a CCK-dependent and acinar cell-specific increase in nuclear localization of p-STAT3, with >75% nuclear occupancy in PI-fed mice vs. <0.1% in controls. Thus, the study identified novel genes likely to be important for CCK-driven pancreatic growth, characterized and biologically validated the dynamic pattern of their expression and investigated STAT-Socs signaling as a new player in this trophic response.
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Affiliation(s)
- Grzegorz T Gurda
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, Michigan 48109-0622, USA.
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Reddy RN, Pena JA, Roberts BR, Williams SR, Price SR, Gooch JL. Rescue of calcineurin Aα(-/-) mice reveals a novel role for the α isoform in the salivary gland. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 178:1605-13. [PMID: 21435446 DOI: 10.1016/j.ajpath.2010.12.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 11/29/2010] [Accepted: 12/30/2010] [Indexed: 10/18/2022]
Abstract
Calcineurin is an important signal transduction mediator in T cells, neurons, the heart, and kidneys. Recent evidence points to unique actions of the two main isoforms of the catalytic subunit. Although the β isoform is required for T-cell development, α is important in the brain and kidney. In addition, mice lacking α but not β suffer from failure to thrive and early mortality. The purpose of this study was to identify the cause of postnatal death of calcineurin α null (CnAα(-/-)) mice and to determine the mechanism of α activity that contributes to the phenotype. CnAα(-/-) mice and wild-type littermate controls were fed a modified diet and then salivary gland function and histology were examined. In vitro studies were performed to identify the mechanism of α action. Data show that calcineurin is required for normal submandibular gland function and secretion of digestive enzymes. Loss of α does not impair nuclear factor of activated T-cell activity or expression but results in impaired protein trafficking downstream of the inositol trisphosphate receptor. These findings show a novel function of calcineurin in digestion and protein trafficking. Significantly, these data also provide a mechanism to rescue to adulthood a valuable animal model of calcineurin inhibitor-mediated neuronal and renal toxicities.
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Affiliation(s)
- Ramesh N Reddy
- Atlanta Veterans Administration Medical Center, Decatur, GA 30322-0001, USA
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Chen W, Zhang X, Siu RK, Chen F, Shen J, Zara JN, Culiat CT, Tetradis S, Ting K, Soo C. Nfatc2 is a primary response gene of Nell-1 regulating chondrogenesis in ATDC5 cells. J Bone Miner Res 2011; 26:1230-41. [PMID: 21611965 PMCID: PMC3312756 DOI: 10.1002/jbmr.314] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2010] [Revised: 10/30/2010] [Accepted: 12/01/2010] [Indexed: 01/05/2023]
Abstract
Nell-1 is a growth factor required for normal skeletal development and expression of extracellular matrix proteins required for bone and cartilage cell differentiation. We identified the transcription factor nuclear factor of activated T cells (Nfatc2) as a primary response gene of Nell-1 through a microarray screen, with validation using real-time polymerase chain reaction (PCR). We investigated the effects of recombinant Nell-1 protein on the chondrogenic cell line ATDC5 and primary mouse chondrocytes. The osteochondral transcription factor Runx2 was investigated as a possible intermediary between Nell-1 and Nfatc2 using adenoviral overexpression of wild-type and dominant-negative Runx2. Nell-1 transiently induced both transcription and translation of Nfatc2, an effect inhibited by transduction of dominant-negative Runx2, suggesting that Runx2 was necessary for Nfatc2 induction. Differentiation assays revealed inhibitory effects of Nell-1 on ATDC5 cells. Although proliferation was unaffected, expression of chondrocyte-specific genes was decreased, and cartilage nodule formation and proteoglycan accumulation were suppressed. siRNA knockdown of Nfatc2 significantly reversed these inhibitory effects. To elucidate the relationship between Nell-1, Runx2, and Nfatc2 in vivo, their presence and distribution were visualized in femurs of wild-type and Nell1-deficient mice at both neonatal and various developmental stages using immunohistochemistry. All three proteins colocalized in the perichondrium of wild-type femurs but stained weakly or were completely absent in Nell1-deficient femurs at neonatal stages. Thus Nfatc2 likely plays an important role in Nell-1-mediated osteochondral differentiation in vitro and in vivo. To our knowledge, this is the first demonstration that Nfatc2 is a primary response gene of Nell-1.
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Affiliation(s)
- Weiwei Chen
- Zhejiang California International NanoSystems Institute, Zhejiang University, Hangzhou, Zhejiang, People’s Republic of China
- Dental and Craniofacial Research Institute, University of California Los Angeles, Los Angeles, CA, USA
| | - Xinli Zhang
- Dental and Craniofacial Research Institute, University of California Los Angeles, Los Angeles, CA, USA
| | - Ronald K Siu
- Department of Biomedical Engineering, University of California Los Angeles, Los Angeles, CA, USA
| | - Feng Chen
- Dental and Craniofacial Research Institute, University of California Los Angeles, Los Angeles, CA, USA
| | - Jia Shen
- Dental and Craniofacial Research Institute, University of California Los Angeles, Los Angeles, CA, USA
| | - Janette N Zara
- Department of Biomedical Engineering, University of California Los Angeles, Los Angeles, CA, USA
| | - Cymbeline T Culiat
- Life Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA
| | - Sotirios Tetradis
- Division of Surgical and Diagnostic Sciences, Section of Oral Radiology, University of California Los Angeles, Los Angeles, CA, USA
| | - Kang Ting
- Dental and Craniofacial Research Institute, University of California Los Angeles, Los Angeles, CA, USA
- Section of Orthodontics, School of Dentistry, University of California Los Angeles, Los Angeles, CA, USA
| | - Chia Soo
- Department of Orthopaedic Surgery, University of California Los Angeles, Los Angeles, CA, USA
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Lin H, Sue YM, Chou Y, Cheng CF, Chang CC, Li HF, Chen CC, Juan SH. Activation of a nuclear factor of activated T-lymphocyte-3 (NFAT3) by oxidative stress in carboplatin-mediated renal apoptosis. Br J Pharmacol 2011; 161:1661-76. [PMID: 20718735 DOI: 10.1111/j.1476-5381.2010.00989.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND AND PURPOSE Although carboplatin is currently used as a therapeutic drug for ovarian, breast, and non-small cell lung cancers, it has serious side effects including renal and cardiac toxicity. Herein, we examined the effect of carboplatin on murine renal tubular cell (RTC) apoptosis both in vivo and in vitro and the underlying molecular mechanisms associated with its activation of the nuclear factor of activated T-lymphocytes-3 (NFAT3). EXPERIMENTAL APPROACH Mechanisms of carboplatin-mediated renal apoptosis were examined using NFAT-reporter transgenic mice and RTCs with NFAT3 overexpression or knockdown. KEY RESULTS We demonstrated that carboplatin initiated an intrinsic apoptotic pathway of activating caspase-3 and -9, accompanied by a decrease in the ratio of Bcl-XL/Bax and a significant increase in Bcl-XS. Carboplatin increased NFAT activation in NFAT-luciferase reporter transgenic mice, RTCs and cells exogenously overexpressing NFAT3 that exacerbated cell death. Furthermore, the addition of either N-acetylcysteine (NAC, an antioxidant) or NFAT inhibitors, including FK-506 (tacrolimus), cyclosporin A (CsA, a calcineurin inhibitor), and BAPTA-AM (a calcium chelator) successfully reversed carboplatin-mediated cell apoptosis, which was further confirmed using siNFAT3. Additionally, NAC blocked NFAT3 activation by inhibition of NADPH oxidase activation, and ERK/JNK and PKC pathways, resulting in a decrease in cell apoptosis; the therapeutic effect of NAC was verified in vivo. CONCLUSION AND IMPLICATIONS The results presented herein show that carboplatin-mediated reactive oxygen species might signal calcineurin and NFAT3 activation in RTCs, whereas NAC and NFAT inhibitors reversed carboplatin-mediated RTC apoptosis, suggesting that oxidative stress-mediated NFAT3 activation is essential for carboplatin-mediated RTC apoptosis.
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Affiliation(s)
- Heng Lin
- Department of Physiology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
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41
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Meissner JD, Freund R, Krone D, Umeda PK, Chang KC, Gros G, Scheibe RJ. Extracellular signal-regulated kinase 1/2-mediated phosphorylation of p300 enhances myosin heavy chain I/beta gene expression via acetylation of nuclear factor of activated T cells c1. Nucleic Acids Res 2011; 39:5907-25. [PMID: 21498542 PMCID: PMC3152325 DOI: 10.1093/nar/gkr162] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The nuclear factor of activated T-cells (NFAT) c1 has been shown to be essential for Ca2+-dependent upregulation of myosin heavy chain (MyHC) I/β expression during skeletal muscle fiber type transformation. Here, we report activation of extracellular signal-regulated kinase (ERK) 1/2 in Ca2+-ionophore-treated C2C12 myotubes and electrostimulated soleus muscle. Activated ERK1/2 enhanced NFATc1-dependent upregulation of a −2.4 kb MyHCI/β promoter construct without affecting subcellular localization of endogenous NFATc1. Instead, ERK1/2-augmented phosphorylation of transcriptional coactivator p300, promoted its recruitment to NFATc1 and increased NFATc1–DNA binding to a NFAT site of the MyHCI/β promoter. In line, inhibition of ERK1/2 signaling abolished the effects of p300. Comparison between wild-type p300 and an acetyltransferase-deficient mutant (p300DY) indicated increased NFATc1–DNA binding as a consequence of p300-mediated acetylation of NFATc1. Activation of the MyHCI/β promoter by p300 depends on two conserved acetylation sites in NFATc1, which affect DNA binding and transcriptional stimulation. NFATc1 acetylation occurred in Ca2+-ionophore treated C2C12 myotubes or electrostimulated soleus. Finally, endogenous MyHCI/β gene expression in C2C12 myotubes was strongly inhibited by p300DY and a mutant deficient in ERK phosphorylation sites. In conclusion, ERK1/2-mediated phosphorylation of p300 is crucial for enhancing NFATc1 transactivation function by acetylation, which is essential for Ca2+-induced MyHCI/β expression.
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Affiliation(s)
- Joachim D Meissner
- Department of Vegetative Physiology, Institute of Biochemistry, Hannover Medical School, D-30625 Hannover, Germany
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Abstract
Cyclosporin A and tacrolimus have been used as immunosuppressive agents initially in organ transplantation after their discovery, and are also used for treatment of the autoimmune disease, providing an excellent therapeutic effect. These agents act targeting on intracellular phosphatase calcineurin (CN), and subsequently inhibit activation of nuclear factor of activated T cells (NFAT), a key regulator of stimulation-dependent gene activation. The CN-NFAT system is involved not only in the immunoregulation including activation and development of helper T cells, regulatory T cells and NKT cells, but in a variety of cellular and developmental events other than immune system. CN inhibitors also affect organs outside of immune system leading to adverse effects, including nephrotoxicity and glucose intolerance. We review recent findings in CN-NFAT system, as well as development of potential CN inhibitors.
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Affiliation(s)
- Yoshiharu Amasaki
- The Center for Rheumatic Diseases/Tonan Hospital, KKR Sapporo Medical Center, Japan
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Transcriptional regulation during CD8 T-cell immune responses. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2010; 684:11-27. [PMID: 20795537 DOI: 10.1007/978-1-4419-6451-9_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Naïve CD8 T cells differentiate in response to antigen stimulation. They acquire the capacity to express multiple effector molecules and mediate effector functions that contribute to infection control. Once antigen loads are reduced they revert progressively to a less activated status and eventually reach a steady-state referred to as "memory" that is very different from that of naive cells. Indeed, these "memory" cells are "ready-to-go" populations that acquired the capacity to respond more efficiently to antigen stimulation. They modify their cell cycle machinery in order to divide faster; they likely improve DNA repair and other cell survival mechanisms in order to survive during division and thus to generate much larger clones of effector cells; finally, they also mediate effector functions much faster. These modifications are the consequence of changes in the expression of multiple genes, i.e., on the utilization of a new transcription program.
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Akbulut S, Reddi AL, Aggarwal P, Ambardekar C, Canciani B, Kim MKH, Hix L, Vilimas T, Mason J, Basson MA, Lovatt M, Powell J, Collins S, Quatela S, Phillips M, Licht JD. Sprouty proteins inhibit receptor-mediated activation of phosphatidylinositol-specific phospholipase C. Mol Biol Cell 2010; 21:3487-96. [PMID: 20719962 PMCID: PMC2947483 DOI: 10.1091/mbc.e10-02-0123] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
PLCγ03B3 binds Spry1 and Spry2. Overexpression of Spry decreased PLCγ03B3 activity and IP3 and DAG production, whereas Spry-deficient cells yielded more IP3. Spry overexpression inhibited T-cell receptor signaling and Spry1 null T-cells hyperproliferated with TCR ligation. Through action of PLCγ03B3, Spry may influence signaling through multiple receptors. Sprouty (Spry) proteins are negative regulators of receptor tyrosine kinase signaling; however, their exact mechanism of action remains incompletely understood. We identified phosphatidylinositol-specific phospholipase C (PLC)-γ as a partner of the Spry1 and Spry2 proteins. Spry–PLCγ interaction was dependent on the Src homology 2 domain of PLCγ and a conserved N-terminal tyrosine residue in Spry1 and Spry2. Overexpression of Spry1 and Spry2 was associated with decreased PLCγ phosphorylation and decreased PLCγ activity as measured by production of inositol (1,4,5)-triphosphate (IP3) and diacylglycerol, whereas cells deficient for Spry1 or Spry1, -2, and -4 showed increased production of IP3 at baseline and further increased in response to growth factor signals. Overexpression of Spry 1 or Spry2 or small-interfering RNA-mediated knockdown of PLCγ1 or PLCγ2 abrogated the activity of a calcium-dependent reporter gene, suggesting that Spry inhibited calcium-mediated signaling downstream of PLCγ. Furthermore, Spry overexpression in T-cells, which are highly dependent on PLCγ activity and calcium signaling, blocked T-cell receptor-mediated calcium release. Accordingly, cultured T-cells from Spry1 gene knockout mice showed increased proliferation in response to T-cell receptor stimulation. These data highlight an important action of Spry, which may allow these proteins to influence signaling through multiple receptors.
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Affiliation(s)
- Simge Akbulut
- Division of Hematology and Oncology, Mount Sinai School of Medicine, New York, NY 10029, USA
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45
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Nagamoto-Combs K, Combs CK. Microglial phenotype is regulated by activity of the transcription factor, NFAT (nuclear factor of activated T cells). J Neurosci 2010; 30:9641-6. [PMID: 20631193 PMCID: PMC2914496 DOI: 10.1523/jneurosci.0828-10.2010] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2010] [Revised: 06/04/2010] [Accepted: 06/12/2010] [Indexed: 11/21/2022] Open
Abstract
The transcription factor family, nuclear factor of activated T cells (NFAT), regulates immune cell phenotype. Four different calcium/calmodulin-regulated isoforms have been identified in the periphery, but isoform expression in microglia, the resident immune cells of the CNS, has not been fully defined. In this study microglial NFAT isoform expression and involvement in regulating inflammatory responses in murine primary microglia culture was examined. Western blot analysis demonstrated robust detection of NFATc1 and c2 isoforms in microglia. Electrophoretic mobility shift assays demonstrated increased NFAT-DNA binding from nuclear extracts of lipopolysaccharide (LPS) stimulated microglia. Moreover, LPS-stimulated microglia behaved similarly to T cell receptor agonist antibody-stimulated Jurkat cells demonstrating a transient increase in NFAT-driven luciferase reporter gene expression. LPS-induced NFAT-luciferase activity in microglia was attenuated by pretreatment with tat-VIVIT, a cell-permeable NFAT inhibitory peptide. Furthermore, LPS-mediated secretion of microglial cytokines, TNF-alpha and MCP-1, was decreased by treatment with tat-VIVIT but not with tat-VEET, a negative control peptide. These results demonstrate that NFAT plays a role in regulating proinflammatory responses in cultured murine microglia.
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Affiliation(s)
- Kumi Nagamoto-Combs
- Department of Pharmacology, Physiology, and Therapeutics, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota 58203
| | - Colin K. Combs
- Department of Pharmacology, Physiology, and Therapeutics, University of North Dakota School of Medicine and Health Sciences, Grand Forks, North Dakota 58203
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Abstract
The roles of nuclear factor of activated T cells (NFAT) transcription factors have been extensively studied in the immune system. However, ubiquitous expression of NFAT isoforms in mammalian tissues has recently been observed, and a role for these transcription factors in human cancer is emerging. Various NFAT isoforms are functional in tumour cells and multiple compartments in the tumour microenvironment, including fibroblasts, endothelial cells and infiltrating immune cells. How do NFAT isoforms regulate the complex interplay between these compartments during carcinoma progression? The answers lie with the multiple functions attributed to NFATs, including cell growth, survival, invasion and angiogenesis. In addition to elucidating the complex role of NFATs in cancer, we face the challenge of targeting this pathway therapeutically.
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Affiliation(s)
- Maria Mancini
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA
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47
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Kinghorn AD, Carcache de Blanco EJ, Chai HB, Orjala J, Farnsworth NR, Soejarto DD, Oberlies NH, Wani MC, Kroll DJ, Pearce CJ, Swanson SM, Kramer RA, Rose WC, Fairchild CR, Vite GD, Emanuel S, Jarjoura D, Cope FO. Discovery of anticancer agents of diverse natural origin. ACTA ACUST UNITED AC 2009; 81:1051-1063. [PMID: 20046887 DOI: 10.1351/pac-con-08-10-16] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A collaborative multidisciplinary research project is described in which new natural product anticancer drug leads are obtained from a diverse group of organisms, constituted by tropical plants, aquatic cyanobacteria, and filamentous fungi. Information is provided on how these organisms are collected and processed. The types of bioassays are indicated in which crude extracts of these acquisitions are tested. Progress made in the isolation of lead bioactive secondary metabolites from three tropical plants is discussed.
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Hanington PC, Tam J, Katzenback BA, Hitchen SJ, Barreda DR, Belosevic M. Development of macrophages of cyprinid fish. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2009; 33:411-429. [PMID: 19063916 DOI: 10.1016/j.dci.2008.11.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2008] [Revised: 11/11/2008] [Accepted: 11/14/2008] [Indexed: 05/27/2023]
Abstract
The innate immune responses of early vertebrates, such as bony fishes, play a central role in host defence against infectious diseases and one of the most important effector cells of innate immunity are macrophages. In order for macrophages to be effective in host defence they must be present at all times in the tissues of their host and importantly, the host must be capable of rapidly increasing macrophage numbers during times of need. Hematopoiesis is a process of formation and development of mature blood cells, including macrophages. Hematopoiesis is controlled by soluble factors known as cytokines, that influence changes in transcription factors within the target cells, resulting in cell fate changes and the final development of specific effector cells. The processes involved in macrophage development have been largely derived from mammalian model organisms. However, recent advancements have been made in the understanding of macrophage development in bony fish, a group of organisms that rely heavily on their innate immune defences. Our understanding of the growth factors involved in teleost macrophage development, as well as the receptors and regulatory mechanisms in place to control them has increased substantially. Furthermore, model organisms such as the zebrafish have emerged as important instruments in furthering our understanding of the transcriptional control of cell development in fish as well as in mammals. This review highlights the recent advancements in our understanding of teleost macrophage development. We focused on the growth factors identified to be important in the regulation of macrophage development from a progenitor cell into a functional macrophage and discuss the important transcription factors that have been identified to function in teleost hematopoiesis. We also describe the findings of in vivo studies that have reinforced observations made in vitro and have greatly improved the relevance and importance of using teleost fish as model organisms for studying developmental processes.
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Mariat C, Degauque N, Balasubramanian S, Kenny J, DeKruyff RH, Umetsu DT, Kuchroo V, Zheng XX, Strom TB. Tim-1 signaling substitutes for conventional signal 1 and requires costimulation to induce T cell proliferation. THE JOURNAL OF IMMUNOLOGY 2009; 182:1379-85. [PMID: 19155484 DOI: 10.4049/jimmunol.182.3.1379] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Differentiation and clonal expansion of Ag-activated naive T cells play a pivotal role in the adaptive immune response. T cell Ig mucin (Tim) proteins influence the activation and differentiation of T cells. Tim-3 and Tim-2 clearly regulate Th1 and Th2 responses, respectively, but the precise influence of Tim-1 on T cell activation remains to be determined. We now show that Tim-1 stimulation in vivo and in vitro induces polyclonal activation of T cells despite absence of a conventional TCR-dependent signal 1. In this model, Tim-1-induced proliferation is dependent on strong signal 2 costimulation provided by mature dendritic cells. Ligation of Tim-1 upon CD4(+) T cells with an agonist anti-Tim-1 mAb elicits a rise in free cytosolic calcium, calcineurin-dependent nuclear translocation of NF-AT, and transcription of IL-2. Because Tim-4, the Tim-1 ligand, is expressed by mature dendritic cells, we propose that interaction between Tim-1(+) T cells and Tim-4(+) dendritic cells might ensure optimal stimulation of T cells, when TCR-derived signals originating within an inflamed environment are weak or waning.
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Affiliation(s)
- Christophe Mariat
- Division of Transplant Immunology and Transplant Research Center, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
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50
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Mallinson J, Meissner J, Chang KC. Chapter 2. Calcineurin signaling and the slow oxidative skeletal muscle fiber type. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2009; 277:67-101. [PMID: 19766967 DOI: 10.1016/s1937-6448(09)77002-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Calcineurin, also known as protein phosphatase 2B (PP2B), is a calcium-calmodulin-dependent phosphatase. It couples intracellular calcium to dephosphorylate selected substrates resulting in diverse biological consequences depending on cell type. In mammals, calcineurin's functions include neuronal growth, development of cardiac valves and hypertrophy, activation of lymphocytes, and the regulation of ion channels and enzymes. This chapter focuses on the key roles of calcineurin in skeletal muscle differentiation, regeneration, and fiber type conversion to an oxidative state, all of which are crucial to muscle development, metabolism, and functional adaptations. It seeks to integrate the current knowledge of calcineurin signaling in skeletal muscle and its interactions with other prominent regulatory pathways and their signaling intermediates to form a molecular overview that could provide directions for possible future exploitations in human metabolic health.
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Affiliation(s)
- Joanne Mallinson
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, UK
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