1201
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Glycans expressed on Trichinella spiralis excretory-secretory antigens are important for anti-inflamatory immune response polarization. Comp Immunol Microbiol Infect Dis 2014; 37:355-67. [PMID: 25467036 DOI: 10.1016/j.cimid.2014.10.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 10/17/2014] [Accepted: 10/20/2014] [Indexed: 01/28/2023]
Abstract
Trichinella spiralis muscle larvae excretory-secretory antigens (ES L1) are most likely responsible for the induction of immune response during infection by this parasitic. The antigens bear carbohydrate structures that may contribute to immune system activation resulting in a Th2/anti-inflammatory immune response. We show that T. spiralis glycans affect the expression and the production of IL-4 and IL-10 in vivo. Alteration of carbohydrate structures on ES L1 altered dendritic cell (DC) maturation. Periodate treatment of ES L1 led to the reduction in both ERK and p38 phosphorylation which may be the cause of reduced IL-10 and IL-12p70 production. In vitro priming of naïve T cells with DCs stimulated with native and periodate-treated ES L1 emphasized the importance of intact glycans for IL-10 production. We conclude that T. spiralis glycans affect the anti-inflammatory environment and can interfere with the development of inflammatory diseases.
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1202
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Qin Y, Zhou ZW, Pan ST, He ZX, Zhang X, Qiu JX, Duan W, Yang T, Zhou SF. Graphene quantum dots induce apoptosis, autophagy, and inflammatory response via p38 mitogen-activated protein kinase and nuclear factor-κB mediated signaling pathways in activated THP-1 macrophages. Toxicology 2014; 327:62-76. [PMID: 25446327 DOI: 10.1016/j.tox.2014.10.011] [Citation(s) in RCA: 128] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 10/16/2014] [Accepted: 10/22/2014] [Indexed: 01/18/2023]
Abstract
The biomedical application of graphene quantum dots (GQDs) is a new emerging area. However, their safety data are still in scarcity to date. Particularly, the effect of GQDs on the immune system remains unknown. This study aimed to elucidate the interaction of GQDs with macrophages and the underlying mechanisms. Our results showed that GQDs slightly affected the cell viability and membrane integrity of macrophages, whereas GQDs significantly increased reactive oxygen species (ROS) generation and apoptotic and autophagic cell death with an increase in the expression level of Bax, Bad, caspase 3, caspase 9, beclin 1, and LC3-I/II and a decrease in that of Bcl-2. Furthermore, low concentrations of GQDs significantly increased the expression of tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), IL-8, whereas high concentrations of GQDs elicited opposite effects on the cytokines production. SB202190, a selective inhibitor of p38 mitogen-activated protein kinase (MAPK), abolished the cytokine-inducing effect of GQDs in macrophages. Moreover, GQDs significantly increased the phosphorylation of p38 MAPK and p65, and promoted the nuclear translocation of nuclear factor-κB (NF-κB). Taken together, these results show that GQDs induce ROS generation, apoptosis, autophagy, and inflammatory response via p38MAPK and NF-κB mediated signaling pathways in THP-1 activated macrophages.
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Affiliation(s)
- Yiru Qin
- Department of Pharmaceutical Science, College of Pharmacy, University of South Florida, Tampa, FL, USA; Department of Molecular Medicine, College of Medicine, University of South Florida, Tampa, FL, USA
| | - Zhi-Wei Zhou
- Department of Pharmaceutical Science, College of Pharmacy, University of South Florida, Tampa, FL, USA
| | - Shu-Ting Pan
- Department of Pharmaceutical Science, College of Pharmacy, University of South Florida, Tampa, FL, USA; Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Zhi-Xu He
- Guizhou Provincial Key Laboratory for Regenerative Medicine, Stem Cell and Tissue Engineering Research Center & Sino-US Joint Laboratory for Medical Sciences, Guiyang Medical University, Guiyang 550004, Guizhou, China
| | - Xueji Zhang
- Research Center for Bioengineering and Sensing Technology, University of Science and Technology Beijing, Beijing 100083, China
| | - Jia-Xuan Qiu
- Department of Oral and Maxillofacial Surgery, The First Affiliated Hospital of Nanchang University, Nanchang 330006, Jiangxi, China
| | - Wei Duan
- School of Medicine, Deakin University, Waurn Ponds, Victoria 3217, Australia
| | - Tianxin Yang
- Department of Internal Medicine, University of Utah and Salt Lake Veterans Affairs Medical Center, Salt Lake City, UT, USA
| | - Shu-Feng Zhou
- Department of Pharmaceutical Science, College of Pharmacy, University of South Florida, Tampa, FL, USA; Department of Molecular Medicine, College of Medicine, University of South Florida, Tampa, FL, USA.
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1203
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Structural and functional basis for p38-MK2-activated Rsk signaling in toll-like receptor-stimulated dendritic cells. Mol Cell Biol 2014; 35:132-40. [PMID: 25332232 PMCID: PMC4295372 DOI: 10.1128/mcb.00773-14] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Rsk kinases play important roles in several cellular processes such as proliferation, metabolism, and migration. Until recently, Rsk activation was thought to be exclusively initiated by Erk1/2, but in dendritic cells (DC) Rsk is also activated by p38 mitogen-activated protein (MAP) kinase via its downstream substrates, MK2/3. How and why this noncanonical configuration of the MAP kinase pathway is adopted by these key immune cells are not known. We demonstrate that the Erk1/2-activated C-terminal kinase domain of Rsk is dispensable for p38-MK2/3 activation and show that compared with fibroblasts, a greater fraction of p38 and MK2/3 is located in the cytosol of DC prior to stimulation, suggesting a partial explanation for the operation of the noncanonical pathway of Rsk activation in these cells. p38/MK2/3-activated Rsk phosphorylated downstream targets and is physiologically important because in plasmacytoid DC (pDC) stimulated with Toll-like receptor 7 (TLR7) agonists, Erk1/2 activation is very weak relative to p38. As a result, Rsk activation is entirely p38 dependent. We show that this unusual configuration of MAP kinase signaling contributes substantially to production of type I interferons, a hallmark of pDC activation.
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1204
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Hussaarts L, Yazdanbakhsh M, Guigas B. Priming dendritic cells for th2 polarization: lessons learned from helminths and implications for metabolic disorders. Front Immunol 2014; 5:499. [PMID: 25368615 PMCID: PMC4202775 DOI: 10.3389/fimmu.2014.00499] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 09/25/2014] [Indexed: 12/20/2022] Open
Abstract
Nearly one quarter of the world's population is infected with helminth parasites. A common feature of helminth infections is the manifestation of a type 2 immune response, characterized by T helper 2 (Th2) cells that mediate anti-helminth immunity. In addition, recent literature describes a close association between type 2 immune responses and wound repair, suggesting that a Th2 response may concurrently mediate repair of parasite-induced damage. The molecular mechanisms that govern Th2 responses are poorly understood, although it is clear that dendritic cells (DCs), which are the most efficient antigen-presenting cells in the immune system, play a central role. Here, we review the molecular mechanisms by which DCs polarize Th2 cells, examining both helminth antigens and helminth-mediated tissue damage as Th2-inducing triggers. Finally, we discuss the implication of these findings in the context of metabolic disorders, as recent literature indicates that various aspects of the Th2-associated inflammatory response contribute to metabolic homeostasis.
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Affiliation(s)
- Leonie Hussaarts
- Department of Parasitology, Leiden University Medical Center , Leiden , Netherlands
| | - Maria Yazdanbakhsh
- Department of Parasitology, Leiden University Medical Center , Leiden , Netherlands
| | - Bruno Guigas
- Department of Parasitology, Leiden University Medical Center , Leiden , Netherlands ; Department of Molecular Cell Biology, Leiden University Medical Center , Leiden , Netherlands
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1205
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Crowell S, Wancket LM, Shakibi Y, Xu P, Xue J, Samavati L, Nelin LD, Liu Y. Post-translational regulation of mitogen-activated protein kinase phosphatase (MKP)-1 and MKP-2 in macrophages following lipopolysaccharide stimulation: the role of the C termini of the phosphatases in determining their stability. J Biol Chem 2014; 289:28753-64. [PMID: 25204653 PMCID: PMC4200237 DOI: 10.1074/jbc.m114.591925] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/05/2014] [Indexed: 01/19/2023] Open
Abstract
MAPK phosphatases (MKPs) are critical modulators of the innate immune response, and yet the mechanisms regulating their accumulation remain poorly understood. In the present studies, we investigated the role of post-translational modification in the accumulation of MKP-1 and MKP-2 in macrophages following LPS stimulation. We found that upon LPS stimulation, MKP-1 and MKP-2 accumulated with different kinetics: MKP-1 level peaked at ∼1 h, while MKP-2 levels continued to rise for at least 6 h. Accumulation of both MKP-1 and MKP-2 were attenuated by inhibition of the ERK cascade. Interestingly, p38 inhibition prior to LPS stimulation had little effect on MKP-1 and MKP-2 protein levels, but hindered their detection by an M-18 MKP-1 antibody. Studies of the epitope sequence recognized by the M-18 MKP-1 antibody revealed extensive phosphorylation of two serine residues in the C terminus of both MKP-1 and MKP-2 by the ERK pathway. Remarkably, the stability of both MKP-1 and MKP-2 was markedly decreased in macrophages in the presence of an ERK pathway inhibitor. Mutation of the two C-terminal serine residues in MKP-1 and MKP-2 to alanine decreased their half-lives, while mutating these residues to aspartate dramatically increased their half-lives. Deletion of the C terminus from MKP-1 and MKP-2 also considerably increased their stabilities. Surprisingly, enhanced stabilities of the MKP-1 and MKP-2 mutants were not associated with decreased ubiquitination. Degradation of both MKP-1 and MKP-2 was attenuated by proteasomal inhibitors. Our studies suggest that MKP-1 and MKP-2 stability is regulated by ERK-mediated phosphorylation through a degradation pathway independent of polyubiquitination.
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Affiliation(s)
- Sara Crowell
- From the Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 43205
| | - Lyn M Wancket
- Department of Veterinary Bioscience, The Ohio State University College of Veterinary Medicine, Columbus, Ohio 43210, and
| | - Yasmine Shakibi
- From the Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 43205
| | - Pingping Xu
- From the Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 43205
| | - Jianjing Xue
- From the Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 43205
| | - Lobelia Samavati
- Department of Medicine, Division of Pulmonary, Critical Care and Sleep Medicine, Wayne State University School of Medicine and Detroit Medical Center, Detroit, Michigan 48201
| | - Leif D Nelin
- From the Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 43205, Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio 43205
| | - Yusen Liu
- From the Center for Perinatal Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio 43205, Department of Veterinary Bioscience, The Ohio State University College of Veterinary Medicine, Columbus, Ohio 43210, and Department of Pediatrics, The Ohio State University College of Medicine, Columbus, Ohio 43205,
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1206
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Woolery AR, Yu X, LaBaer J, Orth K. AMPylation of Rho GTPases subverts multiple host signaling processes. J Biol Chem 2014; 289:32977-88. [PMID: 25301945 DOI: 10.1074/jbc.m114.601310] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Rho GTPases are frequent targets of virulence factors as they are keystone signaling molecules. Herein, we demonstrate that AMPylation of Rho GTPases by VopS is a multifaceted virulence mechanism that counters several host immunity strategies. Activation of NFκB, Erk, and JNK kinase signaling pathways were inhibited in a VopS-dependent manner during infection with Vibrio parahaemolyticus. Phosphorylation and degradation of IKBα were inhibited in the presence of VopS as was nuclear translocation of the NFκB subunit p65. AMPylation also prevented the generation of superoxide by the phagocytic NADPH oxidase complex, potentially by inhibiting the interaction of Rac and p67. Furthermore, the interaction of GTPases with the E3 ubiquitin ligases cIAP1 and XIAP was hindered, leading to decreased degradation of Rac and RhoA during infection. Finally, we screened for novel Rac1 interactions using a nucleic acid programmable protein array and discovered that Rac1 binds to the protein C1QA, a protein known to promote immune signaling in the cytosol. Interestingly, this interaction was disrupted by AMPylation. We conclude that AMPylation of Rho Family GTPases by VopS results in diverse inhibitory consequences during infection beyond the most obvious phenotype, the collapse of the actin cytoskeleton.
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Affiliation(s)
- Andrew R Woolery
- From the Department of Molecular Biology, UT Southwestern Medical Center, Dallas, Texas 75390-9148 and
| | - Xiaobo Yu
- The Virginia G. Piper Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287
| | - Joshua LaBaer
- The Virginia G. Piper Center for Personalized Diagnostics, Biodesign Institute, Arizona State University, Tempe, Arizona 85287
| | - Kim Orth
- From the Department of Molecular Biology, UT Southwestern Medical Center, Dallas, Texas 75390-9148 and
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1207
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Okada M, Matsuzawa A, Yoshimura A, Ichijo H. The lysosome rupture-activated TAK1-JNK pathway regulates NLRP3 inflammasome activation. J Biol Chem 2014; 289:32926-36. [PMID: 25288801 DOI: 10.1074/jbc.m114.579961] [Citation(s) in RCA: 160] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Lysosome rupture triggers NLRP3 inflammasome activation in macrophages. However, the underlying mechanism is not fully understood. Here we showed that the TAK1-JNK pathway, a MAPK signaling pathway, is activated through lysosome rupture and that this activation is necessary for the complete activation of the NLRP3 inflammasome through the oligomerization of an adapter protein, apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC). We also revealed that the activation of the TAK1-JNK pathway is sustained through Ca(2+) ions and that calcium/calmodulin-dependent protein kinase type II functions upstream of the TAK1-JNK pathway and specifically regulates lysosome rupture-induced NLRP3 inflammasome activation. These data suggest a novel role for the TAK1-JNK pathway as a critical regulator of NLRP3 inflammasome activation.
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Affiliation(s)
- Masahiro Okada
- From the Laboratory of Cell Signaling, Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, the Department of Microbiology and Immunology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, and
| | - Atsushi Matsuzawa
- From the Laboratory of Cell Signaling, Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan, the Laboratory of Health Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8578, Japan
| | - Akihiko Yoshimura
- the Department of Microbiology and Immunology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan, and
| | - Hidenori Ichijo
- From the Laboratory of Cell Signaling, Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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1208
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Xu Y, Ito T, Fushimi S, Takahashi S, Itakura J, Kimura R, Sato M, Mino M, Yoshimura A, Matsukawa A. Spred-2 deficiency exacerbates lipopolysaccharide-induced acute lung inflammation in mice. PLoS One 2014; 9:e108914. [PMID: 25275324 PMCID: PMC4183529 DOI: 10.1371/journal.pone.0108914] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 08/26/2014] [Indexed: 11/19/2022] Open
Abstract
Background Acute respiratory distress syndrome (ARDS) is a severe and life-threatening acute lung injury (ALI) that is caused by noxious stimuli and pathogens. ALI is characterized by marked acute inflammation with elevated alveolar cytokine levels. Mitogen-activated protein kinase (MAPK) pathways are involved in cytokine production, but the mechanisms that regulate these pathways remain poorly characterized. Here, we focused on the role of Sprouty-related EVH1-domain-containing protein (Spred)-2, a negative regulator of the Ras-Raf-extracellular signal-regulated kinase (ERK)-MAPK pathway, in lipopolysaccharide (LPS)-induced acute lung inflammation. Methods Wild-type (WT) mice and Spred-2−/− mice were exposed to intratracheal LPS (50 µg in 50 µL PBS) to induce pulmonary inflammation. After LPS-injection, the lungs were harvested to assess leukocyte infiltration, cytokine and chemokine production, ERK-MAPK activation and immunopathology. For exvivo experiments, alveolar macrophages were harvested from untreated WT and Spred-2−/− mice and stimulated with LPS. In invitro experiments, specific knock down of Spred-2 by siRNA or overexpression of Spred-2 by transfection with a plasmid encoding the Spred-2 sense sequence was introduced into murine RAW264.7 macrophage cells or MLE-12 lung epithelial cells. Results LPS-induced acute lung inflammation was significantly exacerbated in Spred-2−/− mice compared with WT mice, as indicated by the numbers of infiltrating leukocytes, levels of alveolar TNF-α, CXCL2 and CCL2 in a later phase, and lung pathology. U0126, a selective MEK/ERK inhibitor, reduced the augmented LPS-induced inflammation in Spred-2−/− mice. Specific knock down of Spred-2 augmented LPS-induced cytokine and chemokine responses in RAW264.7 cells and MLE-12 cells, whereas Spred-2 overexpression decreased this response in RAW264.7 cells. Conclusions The ERK-MAPK pathway is involved in LPS-induced acute lung inflammation. Spred-2 controls the development of LPS-induced lung inflammation by negatively regulating the ERK-MAPK pathway. Thus, Spred-2 may represent a therapeutic target for the treatment of ALI.
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Affiliation(s)
- Yang Xu
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Toshihiro Ito
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Soichiro Fushimi
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Sakuma Takahashi
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Junya Itakura
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Ryojiro Kimura
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Miwa Sato
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Megumi Mino
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Akihiko Yoshimura
- Department of Microbiology and Immunology, Keio University School of Medicine, Tokyo, Japan
| | - Akihiro Matsukawa
- Department of Pathology and Experimental Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
- * E-mail:
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1209
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Palm E, Khalaf H, Bengtsson T. Suppression of inflammatory responses of human gingival fibroblasts by gingipains fromPorphyromonas gingivalis. Mol Oral Microbiol 2014; 30:74-85. [DOI: 10.1111/omi.12073] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/18/2014] [Indexed: 12/13/2022]
Affiliation(s)
- E. Palm
- Department of Biomedicine; School of Health and Medical Sciences; Örebro University; Örebro Sweden
| | - H. Khalaf
- Department of Biomedicine; School of Health and Medical Sciences; Örebro University; Örebro Sweden
| | - T. Bengtsson
- Department of Biomedicine; School of Health and Medical Sciences; Örebro University; Örebro Sweden
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1210
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Ramamoorthi R, Graef KM, Krattiger A, Dent JC. WIPO Re:Search: Catalyzing Collaborations to Accelerate Product Development for Diseases of Poverty. Chem Rev 2014; 114:11272-9. [DOI: 10.1021/cr5000656] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Roopa Ramamoorthi
- BIO Ventures for Global Health, 401 Terry Avenue North, Seattle, Washington 98109, United States
| | - Katy M. Graef
- BIO Ventures for Global Health, 401 Terry Avenue North, Seattle, Washington 98109, United States
| | - Anatole Krattiger
- World Intellectual Property Organization, 34, Chemin des Colombettes, CH-1211 Geneva 20, Switzerland
| | - Jennifer C. Dent
- BIO Ventures for Global Health, 401 Terry Avenue North, Seattle, Washington 98109, United States
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1211
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Wang T, Dai Y, Dun Y, Zhang C, Wan J, Deng L, Zhou Z, Liu C, Yuan D. Chikusetsusaponin V inhibits inflammatory responses via NF-κB and MAPK signaling pathways in LPS-induced RAW 264.7 macrophages. Immunopharmacol Immunotoxicol 2014; 36:404-11. [DOI: 10.3109/08923973.2014.960088] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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1212
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Abstract
The protein kinase Hog1 (high osmolarity glycerol 1) was discovered 20 years ago, being revealed as a central signaling mediator during osmoregulation in the budding yeast Saccharomyces cerevisiae. Homologs of Hog1 exist in all evaluated eukaryotic organisms, and this kinase plays a central role in cellular responses to external stresses and stimuli. Here, we highlight the mechanism by which cells sense changes in extracellular osmolarity, the method by which Hog1 regulates cellular adaptation, and the impacts of the Hog1 pathway upon cellular growth and morphology. Studies that have addressed these issues reveal the influence of the Hog1 signaling pathway on diverse cellular processes.
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Affiliation(s)
- Jay L Brewster
- Natural Science Division, Pepperdine University, 24255 Pacific Coast Highway, Malibu, CA 90263, USA.
| | - Michael C Gustin
- Department of BioSciences, Rice University, 6100 Main Street, Houston, TX 77251, USA
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1213
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del Reino P, Alsina-Beauchamp D, Escós A, Cerezo-Guisado MI, Risco A, Aparicio N, Zur R, Fernandez-Estévez M, Collantes E, Montans J, Cuenda A. Pro-Oncogenic Role of Alternative p38 Mitogen-Activated Protein Kinases p38γ and p38δ, Linking Inflammation and Cancer in Colitis-Associated Colon Cancer. Cancer Res 2014; 74:6150-60. [DOI: 10.1158/0008-5472.can-14-0870] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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1214
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Fish EN, Platanias LC. Interferon receptor signaling in malignancy: a network of cellular pathways defining biological outcomes. Mol Cancer Res 2014; 12:1691-703. [PMID: 25217450 DOI: 10.1158/1541-7786.mcr-14-0450] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
IFNs are cytokines with important antiproliferative activity and exhibit key roles in immune surveillance against malignancies. Early work initiated over three decades ago led to the discovery of IFN receptor activated Jak-Stat pathways and provided important insights into mechanisms for transcriptional activation of IFN-stimulated genes (ISG) that mediate IFN biologic responses. Since then, additional evidence has established critical roles for other receptor-activated signaling pathways in the induction of IFN activities. These include MAPK pathways, mTOR cascades, and PKC pathways. In addition, specific miRNAs appear to play a significant role in the regulation of IFN signaling responses. This review focuses on the emerging evidence for a model in which IFNs share signaling elements and pathways with growth factors and tumorigenic signals but engage them in a distinctive manner to mediate antiproliferative and antiviral responses.
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Affiliation(s)
- Eleanor N Fish
- Toronto General Research Institute, University Health Network and Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Leonidas C Platanias
- Robert H. Lurie Comprehensive Cancer Center and Division of Hematology-Oncology, Northwestern University Medical School and Jesse Brown VA Medical Center, Chicago, Illinois.
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1215
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Pandey SP, Chandel HS, Srivastava S, Selvaraj S, Jha MK, Shukla D, Ebensen T, Guzman CA, Saha B. Pegylated bisacycloxypropylcysteine, a diacylated lipopeptide ligand of TLR6, plays a host-protective role against experimental Leishmania major infection. THE JOURNAL OF IMMUNOLOGY 2014; 193:3632-43. [PMID: 25194056 DOI: 10.4049/jimmunol.1400672] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
TLRs recognize pathogen-expressed Ags and elicit host-protective immune response. Although TLR2 forms heterodimers with TLR1 or TLR6, recognizing different ligands, differences in the functions of these heterodimers remain unknown. In this study, we report that in Leishmania major-infected macrophages, the expression of TLR1 and TLR2, but not TLR6, increased; TLR2-TLR2 association increased, but TLR2-TLR6 association diminished. Lentivirus-expressed TLR1-short hairpin RNA (shRNA) or TLR2-shRNA administration reduced, but TLR6-shRNA increased L. major infection in BALB/c mice. Corroboratively, Pam3CSK4 (TLR1-TLR2 ligand) and peptidoglycan (TLR2 ligand) increased L. major infection but reduced TLR9 expression, whereas pegylated bisacycloxypropylcysteine (BPPcysMPEG; TLR2-TLR6 ligand) reduced L. major number in L. major-infected macrophages, accompanied by increased TLR9 expression, higher IL-12 production, and inducible NO synthase expression. Whereas MyD88, Toll/IL-1R adaptor protein, and TNFR-α-associated factor 6 recruitments to TLR2 were not different in Pam3CSK4-, peptidoglycan-, or BPPcysMPEG-treated macrophages, only BPPcysMPEG enhanced p38MAPK and activating transcription factor 2 activation. BPPcysMPEG conferred antileishmanial functions to L. major-infected BALB/c-derived T cells in a macrophage-T cell coculture and in BALB/c mice; the protection was TLR6 dependent and IL-12 dependent, and it was accompanied by reduced regulatory T cell number. BPPcysMPEG administration during the priming with fixed L. major protected BALB/c mice against challenge L. major infection; the protection was accompanied by low IL-4 and IL-10, but high IFN-γ productions and reduced regulatory T cells. Thus, BPPcysMPEG, a novel diacylated lipopeptide ligand for TLR2-TLR6 heterodimer, induces IL-12-dependent, inducible NO synthase-dependent, T-reg-sensitive antileishmanial protection. The data reveal a novel dimerization partner-dependent duality in TLR2 function.
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Affiliation(s)
| | | | - Sunit Srivastava
- National Centre for Cell Science, Ganeshkhind, Pune 411007, India; and
| | | | - Mukesh Kumar Jha
- National Centre for Cell Science, Ganeshkhind, Pune 411007, India; and
| | - Divanshu Shukla
- National Centre for Cell Science, Ganeshkhind, Pune 411007, India; and
| | - Thomas Ebensen
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, 38124 Braunschweig, Germany
| | - Carlos A Guzman
- Department of Vaccinology and Applied Microbiology, Helmholtz Centre for Infection Research, Braunschweig, 38124 Braunschweig, Germany
| | - Bhaskar Saha
- National Centre for Cell Science, Ganeshkhind, Pune 411007, India; and
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1216
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Yoshikane Y, Koga M, Imanaka-Yoshida K, Cho T, Yamamoto Y, Yoshida T, Hashimoto J, Hirose S, Yoshimura K. JNK is critical for the development of Candida albicans-induced vascular lesions in a mouse model of Kawasaki disease. Cardiovasc Pathol 2014; 24:33-40. [PMID: 25242023 DOI: 10.1016/j.carpath.2014.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2014] [Revised: 07/29/2014] [Accepted: 08/21/2014] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Kawasaki disease (KD) is the most common systemic vasculitis of unknown etiology in children, and can cause the life-threatening complication of coronary artery aneurysm. Although a novel treatment strategy for patients with KD-caused vascular lesions is eagerly awaited, their molecular pathogenesis remains largely unknown. c-Jun N-terminal kinase (JNK) is a signaling molecule known to have roles in inflammation and tissue remodeling. The aim of this study was to elucidate significant involvement of JNK in the development of vascular lesions in a mouse model of KD. METHODS AND RESULTS We injected Candida albicans cell wall extract (CAWE) into 4-week-old C57BL/6 mice. Macroscopically, we found that CAWE caused the development of bulging lesions at coronary artery, carotid artery, celiac artery, iliac artery and abdominal aorta. Histological examination of coronary artery and abdominal aorta in CAWE-treated mice showed marked inflammatory cell infiltration, destruction of elastic lamellae, loss of medial smooth muscle cells and intimal thickening, which are similar to histological features of vascular lesions of patients with KD. To find the role of JNK in lesion formation, we evaluated the effects of JNK inhibitor, SP600125, on abdominal aortic lesions induced by CAWE. Interestingly, treatment with SP600125 significantly decreased the incidence of lesions and also protected against vascular inflammation and tissue destruction histologically, compared with the placebo treatment. CONCLUSIONS Our findings suggest that JNK is crucial for the development of CAWE-induced vascular lesions in mice, and potentially represents a novel therapeutic target for KD.
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Affiliation(s)
- Yukako Yoshikane
- Department of Pediatrics, Faculty of Medicine, Fukuoka University, Fukuoka, 814-0180, Japan.
| | - Mitsuhisa Koga
- Department of Pharmaceutical Care and Health Sciences, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, 814-0180, Japan
| | - Kyoko Imanaka-Yoshida
- Department of Pathology and Matrix Biology, Mie University Graduate School of Medicine, Tsu, 514-8507, Japan; Mie University Research Center for Matrix Biology, Mie University, Tsu, 514-8507, Japan
| | - Tamaki Cho
- Section of Infection Biology, Department of Functional Bioscience, Fukuoka Dental College, Fukuoka, 814-0193, Japan
| | - Yumi Yamamoto
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, 755-8505, Japan
| | - Toshimichi Yoshida
- Department of Pathology and Matrix Biology, Mie University Graduate School of Medicine, Tsu, 514-8507, Japan; Mie University Research Center for Matrix Biology, Mie University, Tsu, 514-8507, Japan
| | - Junichi Hashimoto
- Department of Pediatrics, Faculty of Medicine, Fukuoka University, Fukuoka, 814-0180, Japan
| | - Shinichi Hirose
- Department of Pediatrics, Faculty of Medicine, Fukuoka University, Fukuoka, 814-0180, Japan
| | - Koichi Yoshimura
- Department of Surgery and Clinical Science, Yamaguchi University Graduate School of Medicine, Ube, 755-8505, Japan; Graduate School of Health and Welfare, Yamaguchi Prefectural University, Yamaguchi, 753-8502, Japan
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1217
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HJB-1, a 17-hydroxy-jolkinolide B derivative, inhibits LPS-induced inflammation in mouse peritoneal macrophages. Int Immunopharmacol 2014; 21:474-80. [DOI: 10.1016/j.intimp.2014.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 04/28/2014] [Accepted: 06/02/2014] [Indexed: 11/19/2022]
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1218
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Wei W, Gao J, Shen Y, Chu YL, Xu Q, Tan RX. Immunosuppressive Diterpenes fromPhomopsissp. S12. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402491] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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1219
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Yu S, Nie Y, Knowles B, Sakamori R, Stypulkowski E, Patel C, Das S, Douard V, Ferraris RP, Bonder EM, Goldenring JR, Ip YT, Gao N. TLR sorting by Rab11 endosomes maintains intestinal epithelial-microbial homeostasis. EMBO J 2014; 33:1882-95. [PMID: 25063677 PMCID: PMC4195784 DOI: 10.15252/embj.201487888] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Compartmentalization of Toll-like receptors (TLRs) in intestinal epithelial cells (IECs) regulates distinct immune responses to microbes; however, the specific cellular machinery that controls this mechanism has not been fully identified. Here we provide genetic evidences that the recycling endosomal compartment in enterocytes maintains a homeostatic TLR9 intracellular distribution, supporting mucosal tolerance to normal microbiota. Genetic ablation of a recycling endosome resident small GTPase, Rab11a, a gene adjacent to a Crohn's disease risk locus, in mouse IECs and in Drosophila midgut caused epithelial cell-intrinsic cytokine production, inflammatory bowel phenotype, and early mortality. Unlike wild-type controls, germ-free Rab11a-deficient mouse intestines failed to tolerate the intraluminal stimulation of microbial agonists. Thus, Rab11a endosome controls intestinal host-microbial homeostasis at least partially via sorting TLRs.
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Affiliation(s)
- Shiyan Yu
- Department of Biological Sciences, Rutgers University, Newark, NJ, USA
| | - Yingchao Nie
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Byron Knowles
- Experimental Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Ryotaro Sakamori
- Department of Biological Sciences, Rutgers University, Newark, NJ, USA
| | - Ewa Stypulkowski
- Department of Biological Sciences, Rutgers University, Newark, NJ, USA
| | - Chirag Patel
- Department of Pharmacology and Physiology, Rutgers-New Jersey Medical School, Newark, NJ, USA
| | - Soumyashree Das
- Department of Biological Sciences, Rutgers University, Newark, NJ, USA
| | - Veronique Douard
- Department of Pharmacology and Physiology, Rutgers-New Jersey Medical School, Newark, NJ, USA
| | - Ronaldo P Ferraris
- Department of Pharmacology and Physiology, Rutgers-New Jersey Medical School, Newark, NJ, USA
| | - Edward M Bonder
- Department of Biological Sciences, Rutgers University, Newark, NJ, USA
| | - James R Goldenring
- Experimental Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Yicktung Tony Ip
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA
| | - Nan Gao
- Department of Biological Sciences, Rutgers University, Newark, NJ, USA Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA
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1220
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Sphingosine 1-phosphate induced anti-atherogenic and atheroprotective M2 macrophage polarization through IL-4. Cell Signal 2014; 26:2249-58. [PMID: 25035231 DOI: 10.1016/j.cellsig.2014.07.009] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Accepted: 07/09/2014] [Indexed: 11/23/2022]
Abstract
Sphingosine 1-phosphate (S1P) has been implicated in anti-atherogenic properties of high-density lipoproteins. However, the roles and signaling of S1P in macrophages, the main contributor to atherosclerosis, have not been well studied. Furthermore, pro-inflammatory M1 and anti-inflammatory M2 macrophage phenotypes may influence the development of atherosclerosis. Therefore, we investigated the effects of S1P on macrophage phenotypes, especially on M2 polarization and its signaling in relation to the anti-atherogenic properties of S1P. It was found that S1P induced anti-inflammatory M2 polarization via IL-4 secretion and its signaling, and induced IL-4Rα and IL-2Rγ. In addition, down-stream signalings, such as, stat-6 phosphorylation, SOCS1 induction, and SOCS3 suppression were also observed in macrophages in response to S1P. Furthermore, S1P-induced ERK activation, and the inhibitions of p38 MAPK and JNK were found to be key signals for IL-4 induction. Moreover, the anti-atherogenic effect of S1P in HDL was confirmed by the observation that oxidized LDL-induced lipid accumulation was attenuated in S1P-treated M2 macrophages. Furthermore, the atheroprotective effect of S1P was demonstrated by its anti-apoptotic effect on S1P-treated macrophages. The present study shows that S1P-induced M2 polarization of macrophages could be mediated via IL-4 signaling, and suggests that M2 polarization by S1P is responsible for the anti-atherogenic and atheroprotective properties of high-density lipoproteins in vivo.
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1221
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Physical and functional interaction of the TPL2 kinase with nucleophosmin. Oncogene 2014; 34:2516-26. [PMID: 24998852 DOI: 10.1038/onc.2014.183] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 05/01/2014] [Accepted: 05/21/2014] [Indexed: 12/18/2022]
Abstract
Tumor Progression Locus 2 (TPL2) is widely recognized as a cytoplasmic mitogen-activated protein 3 kinase with a prominent role in the regulation of inflammatory and oncogenic signal transduction. Herein we report that TPL2 may also operate in the nucleus as a physical and functional partner of nucleophosmin (NPM/B23), a major nucleolar phosphoprotein with diverse cellular activities linked to malignancy. We demonstrate that TPL2 mediates the phosphorylation of a fraction of NPM at threonine 199, an event required for its proteasomal degradation and maintenance of steady-state NPM levels. Upon exposure to ultraviolet C, Tpl2 is required for the translocation of de-phosphorylated NPM from the nucleolus to the nucleoplasm. NPM is an endogenous inhibitor of HDM2:p53 interaction and knockdown of TPL2 was found to result in reduced binding of NPM to HDM2, with concomitant defects in p53 accumulation following genotoxic or ribosomal stress. These findings expand our understanding of the function of TPL2 as a negative regulator of carcinogenesis by defining a nuclear role for this kinase in the topological sequestration of NPM, linking p53 signaling to the generation of threonine 199-phosphorylated NPM.
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1222
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Inflammation, vasospasm, and brain injury after subarachnoid hemorrhage. BIOMED RESEARCH INTERNATIONAL 2014; 2014:384342. [PMID: 25105123 PMCID: PMC4106062 DOI: 10.1155/2014/384342] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/14/2014] [Accepted: 05/26/2014] [Indexed: 12/15/2022]
Abstract
Subarachnoid hemorrhage (SAH) can lead to devastating neurological outcomes, and there are few pharmacologic treatments available for treating this condition. Both animal and human studies provide evidence of inflammation being a driving force behind the pathology of SAH, leading to both direct brain injury and vasospasm, which in turn leads to ischemic brain injury. Several inflammatory mediators that are elevated after SAH have been studied in detail. While there is promising data indicating that blocking these factors might benefit patients after SAH, there has been little success in clinical trials. One of the key factors that complicates clinical trials of SAH is the variability of the initial injury and subsequent inflammatory response. It is likely that both genetic and environmental factors contribute to the variability of patients' post-SAH inflammatory response and that this confounds trials of anti-inflammatory therapies. Additionally, systemic inflammation from other conditions that affect patients with SAH could contribute to brain injury and vasospasm after SAH. Continuing work on biomarkers of inflammation after SAH may lead to development of patient-specific anti-inflammatory therapies to improve outcome after SAH.
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1223
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Rodríguez M, Domingo E, Alonso S, Frade JG, Eiros J, Crespo MS, Fernández N. The unfolded protein response and the phosphorylations of activating transcription factor 2 in the trans-activation of il23a promoter produced by β-glucans. J Biol Chem 2014; 289:22942-22957. [PMID: 24982422 DOI: 10.1074/jbc.m113.522656] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Current views on the control of IL-23 production focus on the regulation of il23a, the gene encoding IL-23 p19, by NF-κB in combination with other transcription factors. C/EBP homologous protein (CHOP), X2-Box-binding protein 1 (XBP1), activator protein 1 (AP1), SMAD, CCAAT/enhancer-binding protein (C/EBPβ), and cAMP-response element-binding protein (CREB) have been involved in response to LPS, but no data are available regarding the mechanism triggered by the fungal mimic and β-glucan-containing stimulus zymosan, which produces IL-23 and to a low extent the related cytokine IL-12 p70. Zymosan induced the mobilization of CHOP from the nuclear fractions to phagocytic vesicles. Hypha-forming Candida also induced the nuclear disappearance of CHOP. Assay of transcription factor binding to the il23a promoter showed an increase of Thr(P)-71-Thr(P)-69-activating transcription factor 2 (ATF2) binding in response to zymosan. PKC and PKA/mitogen- and stress-activated kinase inhibitors down-regulated Thr(P)-71-ATF2 binding to the il23a promoter and il23a mRNA expression. Consistent with the current concept of complementary phosphorylations on N-terminal Thr-71 and Thr-69 of ATF2 by ERK and p38 MAPK, MEK, and p38 MAPK inhibitors blunted Thr(P)-69-ATF2 binding. Knockdown of atf2 mRNA with siRNA correlated with inhibition of il23a mRNA, but it did not affect the expression of il12/23b and il10 mRNA. These data indicate the following: (i) zymosan decreases nuclear proapoptotic CHOP, most likely by promoting its accumulation in phagocytic vesicles; (ii) zymosan-induced il23a mRNA expression is best explained through coordinated κB- and ATF2-dependent transcription; and (iii) il23a expression relies on complementary phosphorylation of ATF2 on Thr-69 and Thr-71 dependent on PKC and MAPK activities.
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Affiliation(s)
- Mario Rodríguez
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Universidad de Valladolid, 47005-Valladolid
| | - Esther Domingo
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas, 47003-Valladolid
| | - Sara Alonso
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas, 47003-Valladolid
| | - Javier García Frade
- Division of Hematology, Hospital Universitario Rio Hortega, 47012-Valladolid, and
| | - José Eiros
- Division of Microbiology, Hospital Universitario Rio Hortega, 47012-Valladolid, Spain
| | - Mariano Sánchez Crespo
- Instituto de Biología y Genética Molecular, Consejo Superior de Investigaciones Científicas, 47003-Valladolid,.
| | - Nieves Fernández
- Departamento de Bioquímica y Biología Molecular, Facultad de Medicina, Universidad de Valladolid, 47005-Valladolid
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1224
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Ben-Lulu S, Ziv T, Admon A, Weisman-Shomer P, Benhar M. A substrate trapping approach identifies proteins regulated by reversible S-nitrosylation. Mol Cell Proteomics 2014; 13:2573-83. [PMID: 24973421 DOI: 10.1074/mcp.m114.038166] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Protein S-nitrosylation, the nitric oxide-mediated posttranslational modification of cysteine residues, has emerged as an important regulatory mechanism in diverse cellular processes. Yet, knowledge about the S-nitrosoproteome in different cell types and cellular contexts is still limited and many questions remain regarding the precise roles of protein S-nitrosylation and denitrosylation. Here we present a novel strategy to identify reversibly nitrosylated proteins. Our approach is based on nitrosothiol capture and enrichment using a thioredoxin trap mutant, followed by protein identification by mass spectrometry. Employing this approach, we identified more than 400 putative nitroso-proteins in S-nitrosocysteine-treated human monocytes and about 200 nitrosylation substrates in endotoxin and cytokine-stimulated mouse macrophages. The large majority of these represent novel nitrosylation targets and they include many proteins with key functions in cellular homeostasis and signaling. Biochemical and functional experiments in vitro and in cells validated the proteomic results and further suggested a role for thioredoxin in the denitrosylation and activation of inducible nitric oxide synthase and the protein kinase MEK1. Our findings contribute to a better understanding of the macrophage S-nitrosoproteome and the role of thioredoxin-mediated denitrosylation in nitric oxide signaling. The approach described here may prove generally useful for the identification and exploration of nitroso-proteomes under various physiological and pathophysiological conditions.
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Affiliation(s)
- Shani Ben-Lulu
- From the ‡From the Department of Biochemistry, Rappaport Institute for Research in the Medical Sciences, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Tamar Ziv
- §Smoler Proteomics Center and Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Arie Admon
- §Smoler Proteomics Center and Faculty of Biology, Technion-Israel Institute of Technology, Haifa, Israel
| | - Pnina Weisman-Shomer
- From the ‡From the Department of Biochemistry, Rappaport Institute for Research in the Medical Sciences, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Moran Benhar
- From the ‡From the Department of Biochemistry, Rappaport Institute for Research in the Medical Sciences, Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel;
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1225
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Burotto M, Chiou VL, Lee JM, Kohn EC. The MAPK pathway across different malignancies: a new perspective. Cancer 2014; 120:3446-56. [PMID: 24948110 DOI: 10.1002/cncr.28864] [Citation(s) in RCA: 656] [Impact Index Per Article: 65.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 04/22/2014] [Accepted: 05/08/2014] [Indexed: 12/12/2022]
Abstract
The mitogen-activated protein kinase/extracellular signal-regulated (MAPK/ERK) pathway is activated by upstream genomic events and/or activation of multiple signaling events in which information coalesces at this important nodal pathway point. This pathway is tightly regulated under normal conditions by phosphatases and bidirectional communication with other pathways, like the protein kinase B/mammalian target of rapamycin (AKT/m-TOR) pathway. Recent evidence indicates that the MAPK/ERK signaling node can function as a tumor suppressor as well as the more common pro-oncogenic signal. The effect that predominates depends on the intensity of the signal and the context or tissue in which the signal is aberrantly activated. Genomic profiling of tumors has revealed common mutations in MAPK/ERK pathway components, such as v-raf murine sarcoma viral oncogene homolog B1 (BRAF). Currently approved for the treatment of melanoma, inhibitors of BRAF kinase are being studied alone and in combination with inhibitors of the MAPK and other pathways to optimize the treatment of many tumor types. Therapies targeted toward MAPK/ERK components have various response rates when used in different solid tumors, such as colorectal cancer and ovarian cancer. Understanding the differential nature of activation of the MAPK/ERK pathway in each tumor type is critical in developing single and combination regimens, because different tumors have unique mechanisms of primary and secondary signaling and subsequent sensitivity to drugs.
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Affiliation(s)
- Mauricio Burotto
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, Maryland
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1226
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Cellular signaling in the aging immune system. Curr Opin Immunol 2014; 29:105-11. [PMID: 24934647 DOI: 10.1016/j.coi.2014.05.007] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 05/16/2014] [Accepted: 05/19/2014] [Indexed: 12/11/2022]
Abstract
Causes for immunosenescence and inflamm-aging have to be established. Efficient function of the immune system requires homeostatic regulation from receptor recognition of antigenic challenge to cell responses and adaptation to its changing environment. It is reasonable to assume that one of the most important molecular causes of immunosenescence is alteration in the regulation of signaling pathways. Indeed, alterations in feed-forward and negative feedback (inhibitory) signaling have been highlighted in all cells involved in the immune response including short-lived (neutrophils) and long-lived (T lymphocytes) cells. These dysregulations tip the balance in favor of altered (less efficient) function of the immune system. In this review, we summarize our knowledge on signal transduction changes in the aging immune system and propose a unifying mechanism as one of the causes of immunosenescence. Modulation of these pathways with aging represents a major challenge to restore the immune response to functional levels.
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1227
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Javadov S, Jang S, Agostini B. Crosstalk between mitogen-activated protein kinases and mitochondria in cardiac diseases: therapeutic perspectives. Pharmacol Ther 2014; 144:202-25. [PMID: 24924700 DOI: 10.1016/j.pharmthera.2014.05.013] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 05/30/2014] [Indexed: 02/07/2023]
Abstract
Cardiovascular diseases cause more mortality and morbidity worldwide than any other diseases. Although many intracellular signaling pathways influence cardiac physiology and pathology, the mitogen-activated protein kinase (MAPK) family has garnered significant attention because of its vast implications in signaling and crosstalk with other signaling networks. The extensively studied MAPKs ERK1/2, p38, JNK, and ERK5, demonstrate unique intracellular signaling mechanisms, responding to a myriad of mitogens and stressors and influencing the signaling of cardiac development, metabolism, performance, and pathogenesis. Definitive relationships between MAPK signaling and cardiac dysfunction remain elusive, despite 30 years of extensive clinical studies and basic research of various animal/cell models, severities of stress, and types of stimuli. Still, several studies have proven the importance of MAPK crosstalk with mitochondria, powerhouses of the cell that provide over 80% of ATP for normal cardiomyocyte function and play a crucial role in cell death. Although many questions remain unanswered, there exists enough evidence to consider the possibility of targeting MAPK-mitochondria interactions in the prevention and treatment of heart disease. The goal of this review is to integrate previous studies into a discussion of MAPKs and MAPK-mitochondria signaling in cardiac diseases, such as myocardial infarction (ischemia), hypertrophy and heart failure. A comprehensive understanding of relevant molecular mechanisms, as well as challenges for studies in this area, will facilitate the development of new pharmacological agents and genetic manipulations for therapy of cardiovascular diseases.
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Affiliation(s)
- Sabzali Javadov
- Department of Physiology, School of Medicine, University of Puerto Rico, PR, USA.
| | - Sehwan Jang
- Department of Physiology, School of Medicine, University of Puerto Rico, PR, USA
| | - Bryan Agostini
- Department of Physiology, School of Medicine, University of Puerto Rico, PR, USA
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1228
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Peng H, Shi M, Zhang L, Li Y, Sun J, Zhang L, Wang X, Xu X, Zhang X, Mao Y, Ji Y, Jiang J, Shi W. Activation of JNK1/2 and p38 MAPK signaling pathways promotes enterovirus 71 infection in immature dendritic cells. BMC Microbiol 2014; 14:147. [PMID: 24906853 PMCID: PMC4057572 DOI: 10.1186/1471-2180-14-147] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 05/30/2014] [Indexed: 02/05/2023] Open
Abstract
Background c-Jun NH2-terminal kinase/stress-activated kinase (JNK/SAPK) and the p38 mitogen-activated protein kinase (p38 MAPK) are important components of cellular signal transduction pathways, which have been reported to be involved in viral replication. However, little is known about JNK1/2 and p38 MAPK signaling pathways in enterovirus 71 (EV71)-infected immature dendritic cells (iDCs). Thus, iDCs were induced from peripheral blood mononuclear cells (PBMC) and performed to explore the expressions and phosphorylation of molecules in the two signaling pathways as well as secretions of inflammatory cytokines and interferons during EV71 replication. Results We showed that EV71 infection could activate both JNK1/2 and p38 MAPK in iDCs and phosphorylate their downstream transcription factors c-Fos and c-Jun, which further promoted the production of IL-2, IL-6, IL-10, and TNF-α. Moreover, EV71 infection also increased the release of IFN-β and IL-12 p40. Pretreatment of iDCs with SP600125 and SB203580 (20 μM) could severely impair viral replication and its induced phosphorylation of JNK1/2,p38 MAPK, c-Fos and c-Jun. In addition, treatment of EV71-infected iDCs with SP600125 and SB203580 could inhibit secretions of IL-6, IL-10 and TNF-α. Conclusion JNK1/2 and p38 MAPK signaling pathways are beneficial to EV71 infection and positively regulate secretions of inflammatory cytokines in iDCs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Weifeng Shi
- Department of Clinical Laboratory, the Third Affiliated Hospital of Suzhou University, No, 185 Juqian street, Changzhou, Jiangsu 213003, P, R, China.
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1229
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Bauler TJ, Chase JC, Wehrly TD, Bosio CM. Virulent Francisella tularensis destabilize host mRNA to rapidly suppress inflammation. J Innate Immun 2014; 6:793-805. [PMID: 24902499 DOI: 10.1159/000363243] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Accepted: 04/28/2014] [Indexed: 12/30/2022] Open
Abstract
Highly virulent bacterial pathogens have evolved rapid means to suppress host inflammatory responses by unknown mechanisms. Here, we use virulent Francisella tularensis, the cause of lethal tularemia in humans, as a model to elucidate these mechanisms. We show that following infection of murine macrophages F. tularensis rapidly and selectively destabilizes mRNA containing adenylate-uridylate-rich elements that encode for cytokines and chemokines important in controlling bacterial infection. Degradation of host mRNA encoding interleukin (IL)-1β, IL-6 and CXCL1 did not require viable bacteria or de novo protein synthesis, but did require escape of intracellular organisms from endocytic vesicles into the host cytosol. The specific targeting of host mRNA encoding inflammatory cytokines and chemokines for decay by a bacterial pathogen has not been previously reported. Thus, our findings represent a novel strategy by which a highly virulent pathogen modulates host inflammatory responses critical to the evasion of innate immunity.
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Affiliation(s)
- Timothy J Bauler
- Immunity to Pulmonary Pathogens Section, Laboratory of Intracellular Parasites, Rocky Mountain Laboratories, NIAID, NIH, Hamilton, Mont., USA
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1230
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Robertson AJ, Trost B, Scruten E, Robertson T, Mostajeran M, Connor W, Kusalik A, Griebel P, Napper S. Identification of developmentally-specific kinotypes and mechanisms of Varroa mite resistance through whole-organism, kinome analysis of honeybee. Front Genet 2014; 5:139. [PMID: 24904639 PMCID: PMC4033134 DOI: 10.3389/fgene.2014.00139] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 04/28/2014] [Indexed: 01/08/2023] Open
Abstract
Recent investigations associate Varroa destructor (Mesostigmata: Varroidae) parasitism and its associated pathogens and agricultural pesticides with negative effects on colony health, resulting in sporadic global declines in domestic honeybee (Apis mellifera) populations. These events have motivated efforts to develop research tools that can offer insight into the causes of declining bee health as well as identify biomarkers to guide breeding programs. Here we report the development of a bee-specific peptide array for characterizing global cellular kinase activity in whole bee extracts. The arrays reveal distinct, developmentally-specific signaling profiles between bees with differential susceptibility to infestation by Varroa mites. Gene ontology analysis of the differentially phosphorylated peptides indicates that the differential susceptibility to Varroa mite infestation does not reflect compromised immunity; rather, there is evidence for mite-mediated immune suppression within the susceptible phenotype that may reduce the ability of these bees to counter secondary viral infections. This hypothesis is supported by the demonstration of more diverse viral infections in mite-infested, susceptible adult bees. The bee-specific peptide arrays are an effective tool for understanding the molecular basis of this complex phenotype as well as for the discovery and utilization of phosphorylation biomarkers for breeding programs.
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Affiliation(s)
| | - Brett Trost
- Department of Computer Science, University of Saskatchewan Saskatoon, SK, Canada
| | - Erin Scruten
- Vaccine and Infectious Disease Organization, University of Saskatchewan Saskatoon, SK, Canada
| | | | | | - Wayne Connor
- Vaccine and Infectious Disease Organization, University of Saskatchewan Saskatoon, SK, Canada
| | - Anthony Kusalik
- Department of Computer Science, University of Saskatchewan Saskatoon, SK, Canada
| | - Philip Griebel
- Vaccine and Infectious Disease Organization, University of Saskatchewan Saskatoon, SK, Canada ; School of Public Health, University of Saskatchewan Saskatoon, SK, Canada
| | - Scott Napper
- Vaccine and Infectious Disease Organization, University of Saskatchewan Saskatoon, SK, Canada ; Department of Biochemistry, University of Saskatchewan Saskatoon, SK, Canada
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1231
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Abstract
Toll-like receptors (TLRs) and the receptors for interleukin (IL)-1, IL-18 and IL-33 are required for defence against microbial pathogens but, if hyper-activated or not switched off efficiently, can cause tissue damage and inflammatory and autoimmune diseases. Understanding how the checks and balances in the system are integrated to fight infection without the network operating out of control will be crucial for the development of improved drugs to treat these diseases in the future. In this Cell Science at a Glance article and the accompanying poster, I provide a brief overview of how one of these intricate networks is controlled by the interplay of protein phosphorylation and protein ubiquitylation events, and the mechanisms in myeloid cells that restrict and terminate its activation to prevent inflammatory and autoimmune diseases. Finally, I suggest a few protein kinases that have been neglected as drug targets, but whose therapeutic potential should be explored in the light of recent advances in our understanding of their roles in the innate immune system.
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Affiliation(s)
- Philip Cohen
- MRC Protein Phosphorylation and Ubiquitylation Unit, College of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
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1232
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Sahay B, Owen JL, Zadeh M, Yang T, Lightfoot YL, Abed F, Mohamadzadeh M. Impaired colonic B-cell responses by gastrointestinal Bacillus anthracis infection. J Infect Dis 2014; 210:1499-507. [PMID: 24829464 DOI: 10.1093/infdis/jiu280] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Ingestion of Bacillus anthracis spores causes gastrointestinal (GI) anthrax. Humoral immune responses, particularly immunoglobulin A (IgA)-secreting B-1 cells, play a critical role in the clearance of GI pathogens. Here, we investigated whether B. anthracis impacts the function of colonic B-1 cells to establish active infection. GI anthrax led to significant inhibition of immunoglobulins (eg, IgA) and increased expression of program death 1 on B-1 cells. Furthermore, infection also diminished type 2 innate lymphoid cells (ILC2) and their ability to enhance differentiation and immunoglobulin production by secreting interleukin 5 (IL-5). Such B-1-cell and ILC2 dysfunction is potentially due to cleavage of p38 and Erk1/2 mitogen-activated protein kinases in these cells. Conversely, mice that survived infection generated neutralizing antibodies via the formation of robust germinal center B cells in Peyer's patches and had restored B-1-cell and ILC2 function. These data may provide additional insight for designing efficacious vaccines and therapeutics against this deadly pathogen.
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Affiliation(s)
- Bikash Sahay
- Department of Infectious Diseases and Pathology Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine
| | - Jennifer L Owen
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville
| | - Mojgan Zadeh
- Department of Infectious Diseases and Pathology Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine
| | - Tao Yang
- Department of Infectious Diseases and Pathology Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine
| | - Yaíma L Lightfoot
- Department of Infectious Diseases and Pathology Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine
| | - Firas Abed
- Department of Infectious Diseases and Pathology Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine
| | - Mansour Mohamadzadeh
- Department of Infectious Diseases and Pathology Division of Gastroenterology, Hepatology, and Nutrition, Department of Medicine
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1233
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Target engagement analysis and link to pharmacodynamic endpoint for a novel class of CNS-penetrant and efficacious p38α MAPK inhibitors. J Neuroimmune Pharmacol 2014; 9:454-60. [PMID: 24789302 PMCID: PMC4122817 DOI: 10.1007/s11481-014-9543-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Accepted: 04/16/2014] [Indexed: 12/05/2022]
Abstract
The protein kinase, p38α MAPK, is a key intracellular transducer of stressor-induced neuroinflammatory responses and, as such, is of high interest as a potential therapeutic target. We recently reported the synthesis and evaluation of first-in-class CNS-penetrant and highly specific p38 MAPK inhibitors that avoid target crossover issues seen in popular small molecule p38 MAPK inhibitors used in hundreds of previous reports. The novel p38 MAPK inhibitors, represented in this study by MW181, are efficacious in vivo. Pharmacodynamic actions include attenuation of stressor-induced increases in brain proinflammatory cytokine levels. We report here more detailed analyses of MW181 target engagement and specific linkage to the downstream increase in glia proinflammatory cytokine production. In vivo validation included demonstration that oral administration of MW181 suppresses lipopolysaccharide-induced increases in mouse brain IL-1β, TNFα, IL-6, IL-10, and CXCL1 but not in a drug-resistant p38α MAPK mutant mouse.
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1234
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1235
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Yan GH, Choi YH. Phellinus linteus Extract Exerts Anti-asthmatic Effects by Suppressing NF-κB and p38 MAPK Activity in an OVA-induced Mouse Model of Asthma. Immune Netw 2014; 14:107-15. [PMID: 24851100 PMCID: PMC4022778 DOI: 10.4110/in.2014.14.2.107] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2014] [Revised: 03/30/2014] [Accepted: 04/03/2014] [Indexed: 01/09/2023] Open
Abstract
Phellinus linteus has been used as a traditional herbal medicine in Asian countries and is known to have anti-tumor, immunomodulatory, anti-inflammatory, and anti-allergic activities. However, the protective effects of P. linteus against experimental asthma have not been fully investigated. The objective of this study was to determine whether P. linteus ethanol extract (PLE) suppresses inflammatory response in an OVA-induced asthma model. As expected, the oral administration of PLE significantly inhibited eosinophilic airway inflammation and airway hyperresponsiveness in OVA-challenged BALB/c mice. Supporting these data, the augmentation of Th2 cytokines (IL-4, IL-5, and IL-13), eotaxin, and adhesion molecules in lung tissues and bronchoalveolar lavage fluid after OVA inhalation was markedly attenuated by PLE. Furthermore, PLE reduced OVA-induced activation of NF-κB and p38 MAPK in lung tissues. Therefore, our results suggest the potential of P. linteus as a therapeutic agent for asthma.
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Affiliation(s)
- Guang Hai Yan
- Department of Anatomy and Histology and Embryology, Yanbian University School of Basic Medical Sciences, YanJi 133002, Jilin, China
| | - Yun Ho Choi
- Department of Anatomy, Medical School, Institute for Medical Sciences, Chonbuk National University, Jeonju 561-180, Korea
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1236
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Shah S, King EM, Chandrasekhar A, Newton R. Roles for the mitogen-activated protein kinase (MAPK) phosphatase, DUSP1, in feedback control of inflammatory gene expression and repression by dexamethasone. J Biol Chem 2014; 289:13667-79. [PMID: 24692548 DOI: 10.1074/jbc.m113.540799] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Glucocorticoids act on the glucocorticoid receptor (NR3C1) to repress inflammatory gene expression. This is central to their anti-inflammatory effectiveness and rational improvements in therapeutic index depend on understanding the mechanism. Human pulmonary epithelial A549 cells were used to study the role of the mitogen-activated protein kinase (MAPK) phosphatase, dual-specificity phosphatase 1 (DUSP1), in the dexamethasone repression of 11 inflammatory genes induced, in a MAPK-dependent manner, by interleukin-1β (IL1B). Adenoviral over-expression of DUSP1 inactivated MAPK pathways and reduced expression of all 11 inflammatory genes. IL1B rapidly induced DUSP1 expression and RNA silencing revealed a transient role in feedback inhibition of MAPKs and inflammatory gene expression. With dexamethasone, which induced DUSP1 expression, plus IL1B (co-treatment), DUSP1 expression was further enhanced. At 1 h, this was responsible for the dexamethasone inhibition of IL1B-induced MAPK activation and CXCL1 and CXCL2 mRNA expression, with a similar trend for CSF2. Whereas, CCL20 mRNA was not repressed by dexamethasone at 1 h, repression of CCL2, CXCL3, IL6, and IL8 was unaffected, and PTGS2 repression was partially affected by DUSP1 knockdown. At later times, dexamethasone repression of MAPKs was unaffected by DUSP1 silencing. Likewise, 6 h post-IL1B, dexamethasone repression of all 11 mRNAs was essentially unaffected by DUSP1 knockdown. Qualitatively similar data were obtained for CSF2, CXCL1, IL6, and IL8 release. Thus, despite general roles in feedback inhibition, DUSP1 plays a transient, often partial, role in the dexamethasone-dependent repression of certain inflammatory genes. Therefore this also illustrates key roles for DUSP1-independent effectors in mediating glucocorticoid-dependent repression.
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Affiliation(s)
- Suharsh Shah
- From the Airways Inflammation Research Group, Snyder Institute for Chronic Diseases, University of Calgary, Calgary, Alberta T2N 4Z6, Canada
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1237
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Abstract
The binding of tumour necrosis factor α (TNFα) to cell surface receptors engages multiple signal transduction pathways, including three groups of mitogen-activated protein (MAP) kinases: extracellular-signal-regulated kinases (ERKs); the cJun NH2-terminal kinases (JNKs); and the p38 MAP kinases. These MAP kinase signalling pathways induce a secondary response by increasing the expression of several inflammatory cytokines (including TNFα) that contribute to the biological activity of TNFα. MAP kinases therefore function both upstream and down-stream of signalling by TNFα receptors. Here we review mechanisms that mediate these actions of MAP kinases during the response to TNFα.
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Affiliation(s)
- Guadalupe Sabio
- Department of Vascular Biology and Inflammation, Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III, 28029 Madrid, Spain
| | - Roger J Davis
- Howard Hughes Medical Institute and Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA 01605, USA.
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1238
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Bartels M, Calgarotto AK, Martens AC, Maso V, da Silva SL, Bierings MB, de Souza Queiroz ML, Coffer PJ. Differential effects of nitrostyrene derivatives on myelopoiesis involve regulation of C/EBPα and p38MAPK activity. PLoS One 2014; 9:e90586. [PMID: 24614182 PMCID: PMC3948686 DOI: 10.1371/journal.pone.0090586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 02/03/2014] [Indexed: 11/18/2022] Open
Abstract
Bone marrow failure syndromes and MDS represent a heterogenous group of diseases, characterized by ineffective myelopoiesis, the risk of clonal evolution and a generally poor response to chemotherapy-based treatment regimen. Nitrostyrene derivatives have been studied as protein phosphatase inhibitors in various tumor models. Pharmacological studies have identified nitrostyrene as the structural core underlying a pro-apoptotic effect in tumor cells, yet their effects on normal cells, including those of the hematopoietic system, are largely unknown. In this study, utilizing umbilical cord blood-derived myeloid progenitor cells, patient-derived bone marrow cells, and a (BALB/c) mouse model; we investigated the effects of treatment with two nitrostyrene derivatives (NTS1 and NTS2) on myeloid development. We demonstrate that these compounds stimulate the expansion and differentiation of myeloid progenitors in vitro and improve myeloid reconstitution after chemotherapy-induced bone marrow depletion in vitro and in vivo. These effects were accompanied by increased C/EBPα expression and activity and inhibition of the p38MAPK signalling pathway. Together, our data suggest that nitrostyrenes improve myelopoiesis and represent potential new treatment strategies for patients suffering from bone marrow failure syndromes, hypocellular myelodysplastic syndrome and chemotherapy-induced aplasia.
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Affiliation(s)
- Marije Bartels
- Department of Cell Biology, University Medical Center Utrecht, Utrecht, The Netherlands; Division of Pediatrics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Andrana K Calgarotto
- Departamento de Farmacologica, Universidade Estadual de Campinas, Campinas/SP, Brazil
| | - Anton C Martens
- Department of Cell Biology, University Medical Center Utrecht, Utrecht, The Netherlands; Department of Immunology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Victor Maso
- Departamento de Farmacologica, Universidade Estadual de Campinas, Campinas/SP, Brazil
| | - Saulo L da Silva
- Departamento de Química, Universidade Federal de São João Del-Rei, Ouro Branco/MG, Brazil
| | - Marc B Bierings
- Division of Pediatrics, University Medical Center Utrecht, Utrecht, The Netherlands
| | | | - Paul J Coffer
- Department of Cell Biology, University Medical Center Utrecht, Utrecht, The Netherlands; Division of Pediatrics, University Medical Center Utrecht, Utrecht, The Netherlands
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1239
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Scott IC, Scott DL. Spleen Tyrosine Kinase Inhibitors for Rheumatoid Arthritis: Where Are We Now? Drugs 2014; 74:415-22. [DOI: 10.1007/s40265-014-0193-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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1240
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Kroeker AL, Coombs KM. Systems biology unravels interferon responses to respiratory virus infections. World J Biol Chem 2014; 5:12-25. [PMID: 24600511 PMCID: PMC3942539 DOI: 10.4331/wjbc.v5.i1.12] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 12/11/2013] [Accepted: 01/06/2014] [Indexed: 02/05/2023] Open
Abstract
Interferon production is an important defence against viral replication and its activation is an attractive therapeutic target. However, it has long been known that viruses perpetually evolve a multitude of strategies to evade these host immune responses. In recent years there has been an explosion of information on virus-induced alterations of the host immune response that have resulted from data-rich omics technologies. Unravelling how these systems interact and determining the overall outcome of the host response to viral infection will play an important role in future treatment and vaccine development. In this review we focus primarily on the interferon pathway and its regulation as well as mechanisms by which respiratory RNA viruses interfere with its signalling capacity.
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1241
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Le MQ, Kim MS, Song YS, Noh WN, Chun SC, Yoon DY. The Water-Extracted Ampelopsis brevipedunculata Downregulates IL-1β, CCL5, and COX-2 Expression via Inhibition of PKC-Mediated JNK/NF-κB Signaling Pathways in Human Monocytic Cells. J Pharmacol Sci 2014; 126:359-69. [DOI: 10.1254/jphs.14168fp] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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1242
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Seveau S. Multifaceted activity of listeriolysin O, the cholesterol-dependent cytolysin of Listeria monocytogenes. Subcell Biochem 2014; 80:161-95. [PMID: 24798012 DOI: 10.1007/978-94-017-8881-6_9] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The cholesterol-dependent cytolysins (CDCs) are a large family of pore-forming toxins that are produced by numerous Gram-positive bacterial pathogens. These toxins are released in the extracellular environment as water-soluble monomers or dimers that bind to cholesterol-rich membranes and assemble into large pore complexes. Depending upon their concentration, the nature of the host cell and membrane (cytoplasmic or intracellular) they target, the CDCs can elicit many different cellular responses. Among the CDCs, listeriolysin O (LLO), which is a major virulence factor of the facultative intracellular pathogen Listeria monocytogenes, is involved in several stages of the intracellular lifecycle of the bacterium and displays unique characteristics. It has long been known that following L. monocytogenes internalization into host cells, LLO disrupts the internalization vacuole, enabling the bacterium to replicate into the host cell cytosol. LLO is then used by cytosolic bacteria to spread from cell to cell, avoiding bacterial exposure to the extracellular environment. Although LLO is continuously produced during the intracellular lifecycle of L. monocytogenes, several processes limit its toxicity to ensure the survival of infected cells. It was previously thought that LLO activity was limited to mediating vacuolar escape during bacterial entry and cell to cell spreading. This concept has been challenged by compelling evidence suggesting that LLO secreted by extracellular L. monocytogenes perforates the host cell plasma membrane, triggering important host cell responses. This chapter provides an overview of the well-established intracellular activity of LLO and the multiple roles attributed to LLO secreted by extracellular L. monocytogenes.
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Affiliation(s)
- Stephanie Seveau
- Department of Microbiology, Department of Microbial Infection and Immunity, The Ohio State University, 484 West, 12th Avenue, Columbus, OH, 43210-1292, USA,
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1243
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Singh R, Dangol S, Jwa NS. Yeast two-hybrid system for dissecting the rice MAPK interactome. Methods Mol Biol 2014; 1171:195-216. [PMID: 24908130 DOI: 10.1007/978-1-4939-0922-3_16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Protein-protein interactions are a preliminary but fundamental key to many biological systems. Identification of proteins that interact with particular bait not only contributes to a deeper understanding of bait protein function but also provides much information for the discovery of larger-scale interaction networks (interactome). Therefore, protein-protein interaction mapping is regarded as a widely accepted standardized functional genomics technique that provides comprehensive functional interpretation of previously uncharacterized proteins. A commonly used approach to detecting novel protein-protein interactions is the yeast two-hybrid system. In this chapter we describe in detail the protocols used to dissect the rice MAPK interactome, including the bait protein auto-activation test, identification of a rice MAPK interacting protein, confirmation of interaction by retransformation assay and characterization of the novel interacting protein.
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Affiliation(s)
- Raksha Singh
- Department of Molecular Biology, College of Life Sciences, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul, 143-747, Republic of Korea
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1244
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Yan GH, Choi YH. Lentinus edodes Suppresses Allergen-Induced Airway Hyperresponsiveness and Inflammation by Downregulating Nuclear Factor-kappa B Activity in a Murine Model of Allergic Asthma. ACTA ACUST UNITED AC 2014. [DOI: 10.11637/kjpa.2014.27.2.79] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guang Hai Yan
- Department of Anatomy and Histology and Embryology, Yanbian University School of Basic Medical Sciences, 977 Gongyuan Road, YanJi City 133002, Jilin, China
| | - Yun Ho Choi
- Department of Anatomy, Medical School, Institute for Medical Sciences, Chonbuk National University, Jeonju, Jeonbuk 561-180, Korea
- Institute for Medical Science, Chonbuk National University, Jeonju, Jeonbuk 561-180, Korea
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