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Crosstalk between p38 and Erk 1/2 in Downregulation of FGF1-Induced Signaling. Int J Mol Sci 2019; 20:ijms20081826. [PMID: 31013829 PMCID: PMC6514807 DOI: 10.3390/ijms20081826] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 01/25/2019] [Accepted: 04/10/2019] [Indexed: 11/16/2022] Open
Abstract
Mitogen-activated protein kinases (MAPK): Erk1 and Erk2 are key players in negative-feedback regulation of fibroblast growth factor (FGF) signaling. Upon activation, Erk1 and Erk2 directly phosphorylate FGF receptor 1 (FGFR1) at a specific serine residue in the C-terminal part of the receptor, substantially reducing the tyrosine phosphorylation in the receptor kinase domain and its signaling. Similarly, active Erks can also phosphorylate multiple threonine residues in the docking protein FGF receptor substrate 2 (FRS2), a major mediator of FGFR signaling. Here, we demonstrate that in NIH3T3 mouse fibroblasts and human osteosarcoma U2OS cells stably expressing FGFR1, in addition to Erk1 and Erk2, p38 kinase is able to phosphorylate FRS2. Simultaneous inhibition of Erk1/2 and p38 kinase led to a significant change in the phosphorylation pattern of FRS2 that in turn resulted in prolonged tyrosine phosphorylation of FGFR1 and FRS2 and in sustained signaling, as compared to the selective inhibition of Erks. Furthermore, excessive activation of p38 with anisomycin partially compensated the lack of Erks activity. These experiments reveal a novel crosstalk between p38 and Erk1/2 in downregulation of FGF-induced signaling.
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102
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Fujita M, Sato-Shigeta M, Mori H, Iwasa A, Kawai N, Hassan AH, Tanaka E. Protective Effects of Low-Intensity Pulsed Ultrasound on Mandibular Condylar Cartilage Exposed to Mechanical Overloading. ULTRASOUND IN MEDICINE & BIOLOGY 2019; 45:944-953. [PMID: 30732913 DOI: 10.1016/j.ultrasmedbio.2018.12.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Revised: 12/04/2018] [Accepted: 12/17/2018] [Indexed: 06/09/2023]
Abstract
The aim of this study was to assess the effect of low-intensity pulsed ultrasound (LIPUS) application on rat temporomandibular joints (TMJs) with early-stage of osteoarthritis-like conditions induced by mechanical overloading. Fifteen-week-old male Wistar rats were divided into two experimental groups and a control group (n = 10 each). Both TMJs of all rats in one experimental group were subjected to mechanical overloading for 5 d, and those in the other experimental group were exposed to LIPUS for 20 min/d after overloading. Condyles were assessed using micro-computed tomography, histology and histomorphometry. LIPUS treatment attenuated cartilage degeneration, decreased the number of osteoclastic cells and restored the expression of aggrecan after an initial decrease induced by mechanical overloading. These results indicate that LIPUS may have a protective effect on the early progression of TMJ osteoarthritis.
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Affiliation(s)
- Mutsumi Fujita
- Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Graduate School of Oral Sciences, Tokushima, Japan.
| | - Minami Sato-Shigeta
- Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Hospital, Tokushima, Japan
| | - Hiroki Mori
- Department of Orthodontics and Dentofacial Orthopedics, Tokushima University Hospital, Tokushima, Japan
| | - Akihiko Iwasa
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Nobuhiko Kawai
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
| | - Ali H Hassan
- Faculty of Dentistry, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Eiji Tanaka
- Department of Orthodontics and Dentofacial Orthopedics, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, Japan
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103
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Qu F, Tang J, Peng X, Zhang H, Shi L, Huang Z, Xu W, Chen H, Shen Y, Yan J, Li J, Lu S, Liu Z. Two novel MKKs (MKK4 and MKK7) from Ctenopharyngodon idella are involved in the intestinal immune response to bacterial muramyl dipeptide challenge. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2019; 93:103-114. [PMID: 30633955 DOI: 10.1016/j.dci.2019.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/03/2019] [Accepted: 01/03/2019] [Indexed: 06/09/2023]
Abstract
Mitogen-activated protein kinase kinases (MKKs) are a class of evolutionarily conserved signalling intermediates of the MAPK signalling pathway that can be activated by a diverse range of pathogenic stimuli and are crucial for the regulation of host immune defence. In this study, two fish MKK genes (CiMKK4 and CiMKK7) were first identified and characterized from grass carp (Ctenopharyngodon idella). Similar to other reported MKKs, the present CiMKK4 and CiMKK7 contained a conserved serine/threonine protein kinase (S_TKc) domain and a canonical dual phosphorylation motif. Quantitative real-time PCR results showed that CiMKK4 and CiMKK7 were broadly transcribed in all selected tissues and developmental stages of grass carp. The mRNA expression levels of CiMKK4 and CiMKK7 in the intestine were significantly induced by bacterial muramyl dipeptide (MDP) challenge in a time-dependent manner (P < 0.01). Additionally, the stimulatory effects of bacterial MDP on CiMKK4 and CiMKK7 expression in the intestine were inhibited by the bioactive dipeptide β-alanyl-l-histidine (carnosine) and alanyl-glutamine (Ala-Gln) (P < 0.05). Moreover, overexpression analysis revealed that CiMKK4 and CiMKK7 were localized throughout the entire cell and could significantly enhance AP-1 reporter gene activation in HEK293T cells. Taken together, these results provide the first experimental demonstration that CiMKK4 and CiMKK7 are involved in the intestinal immune response to MDP challenge in C. idella, which may provide new insight into the bacterial-induced intestinal inflammation of bony fishes.
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Affiliation(s)
- Fufa Qu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China; State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, China
| | - Jianzhou Tang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Xiangyu Peng
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Hui Zhang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Liping Shi
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Zhenzhen Huang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Wenqian Xu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Huiqing Chen
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Ying Shen
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Jinpeng Yan
- Department of Cell Biology, School of Life Sciences, Central South University, Changsha, 410017, China
| | - Jianzhong Li
- State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, China
| | - Shuangqing Lu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Zhen Liu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China; State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, China.
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104
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Lee HJ, Spandidos DA, Tsatsakis A, Margina D, Izotov BN, Yang SH. Neuroprotective effects of Scrophularia buergeriana extract against glutamate-induced toxicity in SH-SY5Y cells. Int J Mol Med 2019; 43:2144-2152. [PMID: 30896788 PMCID: PMC6443351 DOI: 10.3892/ijmm.2019.4139] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 03/15/2019] [Indexed: 02/07/2023] Open
Abstract
The aim of this study was to investigate the antioxidant and anti-apoptotic activities, as well as the underlying mechanisms of action, of Scrophularia buergeriana (S. buergeriana) extract (SBE) in glutamate-induced SH-SY5Y cell death. The roots of S. buergeriana were extracted with 70% ethanol, and standardized SBE was used in this study. To induce cytotoxicity, the SH-SY5Y cells were exposed to glutamate for 3 h, or pre-treated with SBE for 1 h, and subsequently incubated with glutamate for 3 h. The neuro-protective effects were assessed by measuring cell viability and the total glutathione contents using commercial kits. The antioxidant and anti-apoptotic mechanisms of action of SBE were evaluated by western blot analysis. The results confirmed that glutamate-induced toxicity was caused by reactive oxygen species (ROS) production, leading to oxidative stress and DNA damage, thus leading to cell death. However, treatment of the SH-SY5Y cells with SBE significantly increased the viability of the cells exposed to glutamate by upregulating the levels of antioxidant proteins, such as superoxide dismutase (SOD)1, SOD2 and glutathione peroxidase-1 (GPx-1), and directly enhancing the total glutathione contents. Furthermore, SBE attenuated DNA impairment and decreased B-cell lymphoma-2 (Bcl-2)-associated X protein (Bax), cleaved caspase-3 and cleaved poly(adenosine diphosphate (ADP)-ribose) polymerase (PARP) activation. In addition, SBE upregulated Bcl-2 expression via p38 mitogen-activated protein kinases (MAPKs). On the whole, the findings of this study demonstrated that SBE exerts neuroprotective effects against glutamate-induced cell toxicity through its antioxidant and anti-apoptotic activities.
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Affiliation(s)
- Hae Jin Lee
- Department of Biotechnology, Chonnam National University, Yeosu 59626, Republic of Korea
| | - Demetrios A Spandidos
- Laboratory of Clinical Virology, School of Medicine, University of Crete, Heraklion 71003, Greece
| | - Aristidis Tsatsakis
- Department of Toxicology and Forensics, School of Medicine, University of Crete, Heraklion 71003, Greece
| | - Denisa Margina
- Department of Biochemistry, Carol Davila University of Medicine and Pharmacy, Faculty of Pharmacy Bucharest 020956, Romania
| | - Boris N Izotov
- Department of Biotechnology, Chonnam National University, Yeosu 59626, Republic of Korea
| | - Seung Hwan Yang
- Department of Analytical and Forensic Medical Toxicology, Sechenov University, Moscow 119991, Russia
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105
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Effects of hypoxia-reoxygenation stress on mitochondrial proteome and bioenergetics of the hypoxia-tolerant marine bivalve Crassostrea gigas. J Proteomics 2019; 194:99-111. [DOI: 10.1016/j.jprot.2018.12.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 12/03/2018] [Accepted: 12/10/2018] [Indexed: 12/21/2022]
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106
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Tian Y, Wen H, Qi X, Zhang X, Li Y. Identification of mapk gene family in Lateolabrax maculatus and their expression profiles in response to hypoxia and salinity challenges. Gene 2019; 684:20-29. [DOI: 10.1016/j.gene.2018.10.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 10/10/2018] [Accepted: 10/11/2018] [Indexed: 10/28/2022]
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107
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Abo El-Maali N, Badr G, Sayed D, Adam R, Abd El Wahab G. Enhanced susceptibility to apoptosis and growth arrest of human breast carcinoma cells treated with silica nanoparticles loaded with monohydroxy flavone compounds. Biochem Cell Biol 2019; 97:513-525. [PMID: 30640511 DOI: 10.1139/bcb-2018-0133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The treatment of drug-resistant cancer is a clinical challenge, hence screening for novel anticancer drugs is critically important. In this study, we investigated the anti-tumor potential of three plant-derived flavone compounds: 3-hydroxy flavone (3-HF), 6-hydroxy flavone (6-HF), and 7-hydroxy flavone (7-HF), either alone or combined with silica nanoparticles (3-HF + NP, 6-HF + NP, and 7-HF + NP), on the human breast carcinoma cell lines MDA-MB-231 and MCF-7, as well as on non-tumorigenic normal breast epithelial cells (MCF-10). The IC50 values of these flavone compounds loaded with NP (flavones + NP) in these cell lines were determined to be 1.5 μg/mL without affecting the viability of normal MCF-10 cells. Additionally, using annexin V - propidium iodide double-staining followed by flow cytometry analysis, we found that the combination of flavones with NP significantly induced apoptosis in MCF-7 and MDA-MB-231 cancer cells. Furthermore, flavones + NP increased the expression of cytochrome c and caspase-9, mediating the growth arrest of these cancer cells. Most importantly, the combination of flavones with NP significantly abolished the expression of ATF-3, which is responsible for the proliferation and invasion of bone-metastatic breast cancer cells. Our data revealed the potential therapeutic effects of these flavones in fighting breast cancer cells, and provide the first insights concerning the underlying molecular mechanisms.
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Affiliation(s)
- Nagwa Abo El-Maali
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt.,Multidisciplinary Research Centre of Excellence, Assiut University, Egypt
| | - Gamal Badr
- Laboratory of Immunology, Zoology Department, Faculty of Science, Assiut University, 71516 Assiut, Egypt
| | - Douaa Sayed
- Clinical Pathology Department, South Egypt Cancer Institute, Assiut University, Assiut, Egypt
| | - Randa Adam
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Gamal Abd El Wahab
- Department of Chemistry, Faculty of Science, Assiut University, Assiut 71516, Egypt
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108
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Qu F, Tang J, Liao J, Chen B, Song P, Luo W, Xiong D, Liu T, Gao Q, Lu S, Liu Z. Mitogen-activated protein kinase kinase 6 is involved in the immune response to bacterial di-/tripeptide challenge in grass carp Ctenopharyngodon idella. FISH & SHELLFISH IMMUNOLOGY 2019; 84:795-801. [PMID: 30393177 DOI: 10.1016/j.fsi.2018.10.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 10/19/2018] [Accepted: 10/26/2018] [Indexed: 06/08/2023]
Abstract
Mitogen-activated protein kinase kinase 6 (MKK6) is an essential component of the p38MAPK signaling pathway, which is involved in the modulation of inflammation, cell apoptosis and survival responses in mammals. However, the function of MKK6s in teleosts is still unclear. In this study, a fish MKK6 homolog (CiMKK6) was first identified from the grass carp (Ctenopharyngodon idella), a freshwater fish. CiMKK6 cDNA encodes a putative protein of 357 amino acids that contains conserved structural characteristics of the MKK6 family, including the S_TKc domain, SVAKT motif and DVD site. The deduced CiMKK6 protein exhibits high sequence homology with other reported fish MKK6s and shares the closest relationship with MKK6 from Danio rerio. Quantitative real-time PCR (qRT-PCR) analysis revealed that CiMKK6 mRNA was widely expressed in all tested tissues and stages of embryonic development. Additionally, the transcript levels of CiMKK6 in the intestine were significantly upregulated in response to bacterial muramyl dipeptide (MDP) and L-Ala-γ-D-Glu-meso-diaminopimelic acid (Tri-DAP) stimulation. Moreover, subcellular localization analysis indicated that CiMKK6 was distributed in both the cytoplasm and the nucleus of HEK293T cells. Finally, overexpression of CiMKK6 significantly enhanced the transcriptional activity of the AP-1 reporter gene in HEK293T cells. Overall, these findings may help better clarify the immune function of teleost MKK6s and provide new insight into the immune defense mechanisms of grass carp.
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Affiliation(s)
- Fufa Qu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China; State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, China
| | - Jianzhou Tang
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Jinting Liao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Bei Chen
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Peng Song
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Wenjie Luo
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China; State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, China
| | - Ding Xiong
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Tianting Liu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Qianting Gao
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Shuangqing Lu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China
| | - Zhen Liu
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Department of Biological and Environmental Engineering, Changsha University, Changsha, 410022, China; State Key Laboratory of Developmental Biology of Freshwater Fish, Hunan Normal University, Changsha, 410081, China.
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109
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Chloroquine Protects Human Corneal Epithelial Cells from Desiccation Stress Induced Inflammation without Altering the Autophagy Flux. BIOMED RESEARCH INTERNATIONAL 2018; 2018:7627329. [PMID: 30519584 PMCID: PMC6241345 DOI: 10.1155/2018/7627329] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 08/21/2018] [Accepted: 10/01/2018] [Indexed: 12/13/2022]
Abstract
Dry eye disease (DED) is a multifactorial ocular surface disorder affecting millions of individuals worldwide. Inflammation has been associated with dry eye and anti-inflammatory drugs are now being targeted as the alternate therapeutic approach for dry eye condition. In this study, we have explored the anti-inflammatory and autophagy modulating effect of chloroquine (CQ) in human corneal epithelial and human corneal fibroblasts cells exposed to desiccation stress, (an in-vitro model for DED). Gene and protein expression profiling of inflammatory and autophagy related molecular factors were analyzed in HCE-T and primary HCF cells exposed to desiccation stress with and without CQ treatment. HCE-T and HCF cells exposed to desiccation stress exhibited increased levels of activated p65, TNF-α, MCP-1, MMP-9, and IL-6. Further, treatment with CQ decreased the levels of active p65, TNF-α, MCP-1, and MMP-9 in cells underdesiccation stress. Increased levels of LC3B and LAMP1 markers in HCE-T cells exposed to desiccation stress suggest activation of autophagy and the addition of CQ did not alter these levels. Changes in the phosphorylation levels of MAPKinase and mTOR pathway proteins were found in HCE-T cells under desiccation stress with or without CQ treatment. Taken together, the data suggests that HCE-T cells under desiccation stress showed NFκB mediated inflammation, which was rescued through the anti-inflammatory effect of CQ without altering the autophagy flux. Therefore, CQ may be used as an alternate therapeutic management for dry eye condition.
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110
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Pierzynowski SG, Gregory PC, Filip R, Woliński J, Pierzynowska KG. Glucose homeostasis dependency on acini-islet-acinar (AIA) axis communication: a new possible pathophysiological hypothesis regarding diabetes mellitus. Nutr Diabetes 2018; 8:55. [PMID: 30293998 PMCID: PMC6174155 DOI: 10.1038/s41387-018-0062-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2017] [Revised: 08/29/2018] [Accepted: 09/06/2018] [Indexed: 02/08/2023] Open
Abstract
Studies have highlighted the existence of two intra-pancreatic axes of communication: one involved in the regulation of enzyme production by insulin-the insular-acinar axis; and another involved in the regulation of insulin release by pancreatic enzymes-the acini-insular axis. Previous studies by our laboratory show that pancreatic enzymes can affect blood glucose homeostasis and insulin secretion independently of their digestive functions, both from the gut lumen and probably from the blood. As a result we would like to introduce here the concept of acini-islet-acinar (AIA) axis communication (feedback), which could play an important role in the development of obesity and diabetes type 2. The AIA feedback links the endocrine and exocrine parts of the pancreas and emphasizes the essential role that the pancreas plays, as a single organ, in the regulation of glucose homeostasis by amylase most probably in gut epithelium and by insulin and glucagon in peripheral blood.
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Affiliation(s)
- Stefan G Pierzynowski
- Department of Biology, Lund University, Sölvegatan 35, 22362, Lund, Sweden. .,Anara AB/SGPlus, Alfågelgränden 24, 23132, Trelleborg, Sweden. .,PROF/Vitanano Sp.z o.o., Woronieckiego 1a-13, 20491, Lublin, Poland. .,Department of Medical Biology., Inst, Rural Medicine, Jaczewskiego 2, 20950, Lublin, Poland. .,Innovation Centre - STB, Skarszewska 23, 83100, Tczew, Poland.
| | - Peter C Gregory
- PROF/Vitanano Sp.z o.o., Woronieckiego 1a-13, 20491, Lublin, Poland
| | - Rafał Filip
- Department of Gastroenterology with IBD Unit of Clinical Hospital 2, University of Rzeszow, Lwowska 60, Rzeszow, 35301, Poland
| | - Jarosław Woliński
- Department of Animal Physiology, The Kielanowski Institute of Animal Nutrition and Physiology Polish Academy of Sciences, Instytucka 3, 05110, Jabłonna, Poland
| | - Kateryna Goncharova Pierzynowska
- Department of Biology, Lund University, Sölvegatan 35, 22362, Lund, Sweden. .,Anara AB/SGPlus, Alfågelgränden 24, 23132, Trelleborg, Sweden. .,PROF/Vitanano Sp.z o.o., Woronieckiego 1a-13, 20491, Lublin, Poland. .,Innovation Centre - STB, Skarszewska 23, 83100, Tczew, Poland.
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111
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Zhang X, Simmons CA, Santerre JP. Alterations of MEK1/2-ERK1/2, IFNγ and Smad2/3 associated Signalling pathways during cryopreservation of ASCs affect their differentiation towards VSMC-like cells. Stem Cell Res 2018; 32:115-125. [DOI: 10.1016/j.scr.2018.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/06/2018] [Accepted: 09/07/2018] [Indexed: 12/13/2022] Open
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112
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Wijenayake S, Luu BE, Zhang J, Tessier SN, Quintero-Galvis JF, Gaitán-Espitia JD, Nespolo RF, Storey KB. Strategies of biochemical adaptation for hibernation in a South American marsupial Dromiciops gliroides: 1. Mitogen-activated protein kinases and the cell stress response. Comp Biochem Physiol B Biochem Mol Biol 2018; 224:12-18. [DOI: 10.1016/j.cbpb.2017.12.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 12/06/2017] [Accepted: 12/07/2017] [Indexed: 12/21/2022]
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113
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Saini P, Beniwal A, Kokkiligadda A, Vij S. Response and tolerance of yeast to changing environmental stress during ethanol fermentation. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.07.001] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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114
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Liu X, Wang B, Ding H, Shi H, Liu J, Sun H. Low-intensity pulsed ultrasound in combination with SonoVue induces cytotoxicity of human renal glomerular endothelial cells via repression of the ERK1/2 signaling pathway. Ren Fail 2018; 40:458-465. [PMID: 30122107 PMCID: PMC6104615 DOI: 10.1080/0886022x.2018.1487868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/30/2022] Open
Abstract
OBJECTIVES Low-intensity pulsed ultrasound (LIPUS) and SonoVue have been used widely for diagnosis and therapeutic treatment. The effects of LIPUS and SonoVue on the microvascular system and underlying molecular mechanisms have not been established. METHODS Cultured human renal glomerular endothelial cells (HRGECs) were treated with 5-min ultrasonic irradiation, 20% SonoVue or the combination of both treatments. Cell proliferation, viablity, and apoptosis were measured by MTT assay, Trypan blue exclusion assay and flow cytometry, respectively. Activation of extracellular regulated protein kinases (ERK) were examined by Western blot. RESULTS We found that LIPUS and SonoVue alone do not induce cytotoxicity of HRGECs; however, the combination of the two treatments reduces cell proliferation and increases cell death. In addition, the combination of LIPUS and SonoVue suppressed the activation of ERK 1/2 in HRGRCs. With pretreatment of the inhibitor of ERK1/2 signaling, PD98059, LIPUS, and SonoVue does not induce additional cell death and inhibition of proliferation. CONCLUSIONS LIPUS combined with SonoVue induces cytotoxicity of HRGECs via repression of the ERK1/2 signaling pathway.
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Affiliation(s)
- Xiu Liu
- a Shandong Provincial Qianfoshan Hospital, Shandong University , Jinan , China.,b Department of Cardiography , Yantai Affiliated Hospital of Binzhou Medical University , Yantai , China
| | - Bei Wang
- c Department of Ultrasonography , Shandong Provincial Qianfoshan Hospital, Shandong University , Jinan , China
| | - Hongyu Ding
- c Department of Ultrasonography , Shandong Provincial Qianfoshan Hospital, Shandong University , Jinan , China
| | - Hao Shi
- d Department of Radiology, Shandong Provincial Qianfoshan Hospital , Shandong University , Jinan , China
| | - Ju Liu
- e Medical Research Center, Shandong Provincial Qianfoshan Hospital, Shandong University , Jinan , China
| | - Hongjun Sun
- e Medical Research Center, Shandong Provincial Qianfoshan Hospital, Shandong University , Jinan , China
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Reece E, Doyle S, Greally P, Renwick J, McClean S. Aspergillus fumigatus Inhibits Pseudomonas aeruginosa in Co-culture: Implications of a Mutually Antagonistic Relationship on Virulence and Inflammation in the CF Airway. Front Microbiol 2018; 9:1205. [PMID: 29922270 PMCID: PMC5996130 DOI: 10.3389/fmicb.2018.01205] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 05/17/2018] [Indexed: 11/26/2022] Open
Abstract
Many cystic fibrosis (CF) airway infections are considered to be polymicrobial and microbe–microbe interactions may play an important role in disease pathology. Pseudomonas aeruginosa and Aspergillus fumigatus are the most prevalent bacterial and fungal pathogens isolated from the CF airway, respectively. We have previously shown that patients co-colonized with these pathogens had comparable outcomes to those chronically colonized with P. aeruginosa. Our objective was to examine the interactions between A. fumigatus and P. aeruginosa, specifically the effects of co-colonization on biofilm formation, virulence and host pro-inflammatory responses. Our findings suggest that co-infections of A. fumigatus and P. aeruginosa in the Galleria mellonella acute infection model showed that pre-exposure of larvae to sub-lethal inocula of A. fumigatus increased the mortality caused by subsequent P. aeruginosa infection. Co-infection of human bronchial epithelial cells (CFBE41o-) with both pathogens did not enhance IL-6 and IL-8 production beyond the levels observed following single infections. In addition, both pathogens stimulated cytokine secretion via the same two mitogen-activated protein kinases (MAPKs) signaling pathways, ERK and p38. Mixed species biofilms showed overall reduced biofilm development with crystal violet staining. Quantification by species-specific qPCR revealed that both pathogens had mutually antagonistic effects on each other. A. fumigatus supernatants showed strong anti-Pseudomonal activity and gliotoxin was the main active agent. Gliotoxin resulted in varying levels of anti-biofilm activity toward other bacteria commonly found in the CF airways. Gliotoxin produced by A. fumigatus colonizing the CF airways may have a significant impact on the CF airway microbiome composition with potential clinical implications.
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Affiliation(s)
- Emma Reece
- Department of Clinical Microbiology, Trinity College Dublin - Trinity Centre for Health Science, Tallaght Hospital, Dublin, Ireland
| | - Sean Doyle
- Department of Biology, Maynooth University, Maynooth, Ireland
| | - Peter Greally
- Department of Respiratory Medicine, The National Children's Hospital, Tallaght Hospital, Dublin, Ireland
| | - Julie Renwick
- Department of Clinical Microbiology, Trinity College Dublin - Trinity Centre for Health Science, Tallaght Hospital, Dublin, Ireland
| | - Siobhán McClean
- School of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
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Logan SM, Storey KB. Pro-inflammatory AGE-RAGE signaling is activated during arousal from hibernation in ground squirrel adipose. PeerJ 2018; 6:e4911. [PMID: 29888131 PMCID: PMC5991297 DOI: 10.7717/peerj.4911] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 05/15/2018] [Indexed: 12/26/2022] Open
Abstract
Background Inflammation is generally suppressed during hibernation, but select tissues (e.g. lung) have been shown to activate both antioxidant and pro-inflammatory pathways, particularly during arousal from torpor when breathing rates increase and oxidative metabolism fueling the rewarming process produces more reactive oxygen species. Brown and white adipose tissues are now understood to be major hubs for the regulation of immune and inflammatory responses, yet how these potentially damaging processes are regulated by fat tissues during hibernation has hardly been studied. The advanced glycation end-product receptor (RAGE) can induce pro-inflammatory responses when bound by AGEs (which are glycated and oxidized proteins, lipids, or nucleic acids) or damage associated molecular pattern molecules (DAMPs, which are released from dying cells). Methods Since gene expression and protein synthesis are largely suppressed during torpor, increases in AGE-RAGE pathway proteins relative to a euthermic control could suggest some role for these pro-inflammatory mediators during hibernation. This study determined how the pro-inflammatory AGE-RAGE signaling pathway is regulated at six major time points of the torpor-arousal cycle in brown and white adipose from a model hibernator, Ictidomys tridecemlineatus. Immunoblotting, RT-qPCR, and a competitive ELISA were used to assess the relative gene expression and protein levels of key regulators of the AGE-RAGE pathway during a hibernation bout. Results The results of this study revealed that RAGE is upregulated as animals arouse from torpor in both types of fat, but AGE and DAMP levels either remain unchanged or decrease. Downstream of the AGE-RAGE cascade, nfat5 was more highly expressed during arousal in brown adipose. Discussion An increase in RAGE protein levels and elevated mRNA levels of the downstream transcription factor nfat5 during arousal suggest the pro-inflammatory response is upregulated in adipose tissue of the hibernating ground squirrel. It is unlikely that this cascade is activated by AGEs or DAMPs. This research sheds light on how a fat-but-fit organism with highly regulated metabolism may control the pro-inflammatory AGE-RAGE pathway, a signaling cascade that is often dysregulated in other obese organisms.
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Affiliation(s)
- Samantha M Logan
- Institute of Biochemistry, Departments of Biology and Chemistry, Carleton University, Ottawa, Ontario, Canada
| | - Kenneth B Storey
- Institute of Biochemistry, Departments of Biology and Chemistry, Carleton University, Ottawa, Ontario, Canada
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Uchida T, Sakashita Y, Kitahata K, Yamashita Y, Tomida C, Kimori Y, Komatsu A, Hirasaka K, Ohno A, Nakao R, Higashitani A, Higashibata A, Ishioka N, Shimazu T, Kobayashi T, Okumura Y, Choi I, Oarada M, Mills EM, Teshima-Kondo S, Takeda S, Tanaka E, Tanaka K, Sokabe M, Nikawa T. Reactive oxygen species upregulate expression of muscle atrophy-associated ubiquitin ligase Cbl-b in rat L6 skeletal muscle cells. Am J Physiol Cell Physiol 2018. [DOI: 10.1152/ajpcell.00184.2017] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Unloading-mediated muscle atrophy is associated with increased reactive oxygen species (ROS) production. We previously demonstrated that elevated ubiquitin ligase casitas B-lineage lymphoma-b (Cbl-b) resulted in the loss of muscle volume (Nakao R, Hirasaka K, Goto J, Ishidoh K, Yamada C, Ohno A, Okumura Y, Nonaka I, Yasutomo K, Baldwin KM, Kominami E, Higashibata A, Nagano K, Tanaka K, Yasui N, Mills EM, Takeda S, Nikawa T. Mol Cell Biol 29: 4798–4811, 2009). However, the pathological role of ROS production associated with unloading-mediated muscle atrophy still remains unknown. Here, we showed that the ROS-mediated signal transduction caused by microgravity or its simulation contributes to Cbl-b expression. In L6 myotubes, the assessment of redox status revealed that oxidized glutathione was increased under microgravity conditions, and simulated microgravity caused a burst of ROS, implicating ROS as a critical upstream mediator linking to downstream atrophic signaling. ROS generation activated the ERK1/2 early-growth response protein (Egr)1/2-Cbl-b signaling pathway, an established contributing pathway to muscle volume loss. Interestingly, antioxidant treatments such as N-acetylcysteine and TEMPOL, but not catalase, blocked the clinorotation-mediated activation of ERK1/2. The increased ROS induced transcriptional activity of Egr1 and/or Egr2 to stimulate Cbl-b expression through the ERK1/2 pathway in L6 myoblasts, since treatment with Egr1/2 siRNA and an ERK1/2 inhibitor significantly suppressed clinorotation-induced Cbl-b and Egr expression, respectively. Promoter and gel mobility shift assays revealed that Cbl-b was upregulated via an Egr consensus oxidative responsive element at −110 to −60 bp of the Cbl-b promoter. Together, this indicates that under microgravity conditions, elevated ROS may be a crucial mechanotransducer in skeletal muscle cells, regulating muscle mass through Cbl-b expression activated by the ERK-Egr signaling pathway.
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Affiliation(s)
- Takayuki Uchida
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Yoshihiro Sakashita
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Kanako Kitahata
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Yui Yamashita
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Chisato Tomida
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Yuki Kimori
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Akio Komatsu
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Katsuya Hirasaka
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Graduate School of Fisheries Science and Environmental Studies, Nagasaki University, Nagasaki, Japan
| | - Ayako Ohno
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
| | - Reiko Nakao
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Biological Clock Research Group, Biomedical Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki, Japan
| | | | - Akira Higashibata
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki, Japan
| | - Noriaki Ishioka
- Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Tsukuba, Ibaraki, Japan
| | | | - Takeshi Kobayashi
- Department of Physiology, Nagoya University, School of Medicine, Nagoya, Japan
| | - Yuushi Okumura
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Faculty of Nutritional Science, Sagami Women’s University, Kanagawa, Japan
| | - Inho Choi
- Institute of Space Biology, Yonsei University, Wonju, South Korea
| | - Motoko Oarada
- Faculty of Nutritional Science, Sagami Women’s University, Kanagawa, Japan
| | - Edward M. Mills
- Division of Pharmacology/Toxicology, College of Pharmacy, University of Texas, Austin, Texas
| | - Shigetada Teshima-Kondo
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
- Department of Nutrition, Graduate School of Comprehensive Rehabilitation, Osaka Prefecture University, Osaka, Japan
| | - Shin’ichi Takeda
- Translational Research Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Eiji Tanaka
- Department of Orthodontic Dentistry, Institute of Medical Biosciences, Tokushima University Graduate School, Tokushima, Japan
| | - Keiji Tanaka
- Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan
| | - Masahiro Sokabe
- Department of Physiology, Nagoya University, School of Medicine, Nagoya, Japan
| | - Takeshi Nikawa
- Department of Nutritional Physiology, Institute of Medical Nutrition, Tokushima University Graduate School, Tokushima, Japan
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Developmental and molecular responses of buffalo (Bubalus bubalis) cumulus–oocyte complex maturedin vitrounder heat shock conditions. ZYGOTE 2018; 26:177-190. [DOI: 10.1017/s0967199418000072] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
SummaryTo investigate the effects of physiologically relevant heat shock during oocyte maturation, buffalo cumulus–oocyte complexes (COCs) were cultured at 38.5°C (control) or were exposed to 39.5°C (T1) or 40.5°C (T2) for the first 6 h ofin vitromaturation (IVM), followed by 38.5°C through the next 18 h/IVM and early embryonic development up to the blastocyst stage. Gene expression analysis was performed on selected target genes (HSF-1,HSF-2,HSP-70,HSP-90,BAX,p53,SOD1,COX1,MAPK14) in denuded oocytes and their isolated cumulus cells resulting from control COCs as well as from COCs exposed to a temperature of 39.5°C (T1). The results indicated that heat shock significantly (P< 0.01) decreased the maturation rate in T1 and T2 cells compared with the control. Afterin vitrofertilization (IVF), cleavage rate was lower (P< 0.01) for oocytes exposed to heat stress, and the percentage of oocytes arrested at the 2- or 4-cell stage was higher (P< 0.01) than that of the control. The percentage of oocytes that developed to the 8-cell, 16-cell or blastocyst stage was lower (P< 0.01) in both T1 and T2 groups compared with the control group. mRNA expression levels for the studied genes were decreased (P< 0.05) in treated oocytes (T1) except forHSP-90andHSF-1, which were increased. In cumulus cells isolated from COCs (T1), the expression for the target genes was upregulated except forBAX, which was downregulated. The results of this study demonstrated that exposure of buffalo oocytes to elevated temperatures for 6 h severely compromised their developmental competence and gene expression.
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Singh T, Agarwal T, Ghosh SK. Identification and functional analysis of a stress-responsive MAPK15 in Entamoeba invadens. Mol Biochem Parasitol 2018; 222:34-44. [PMID: 29730364 DOI: 10.1016/j.molbiopara.2018.05.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 03/30/2018] [Accepted: 05/01/2018] [Indexed: 01/04/2023]
Abstract
E. histolytica, a protozoan parasite is the causative agent of amoebiasis in human beings. It exists in two different forms - the motile trophozoite form which undergoes encystation under starvation conditions to form the non-motile, osmotically resistant cyst form. Cellular stresses stimulate several signaling cascades which assist the parasite in counter-attacking such conditions thereby, promoting cell survival. To study the stress-associated pathways activated during encystation, we have used Entamoeba invadens, a reptilian parasite as a model organism because of its ability to undergo encystation under in vitro conditions. In this study, we have identified a stress-responsive MAPK which gets upregulated under different stress conditions, including encystation. Sequence analysis and phylogenetic classification show that the MAPK belongs to the atypical MAPK15 family (henceforth, named EiMAPK15), which does not require an upstream MAPKK for its phosphorylation and activation. The in vitro kinase activity of recombinant EiMAPK15 exhibits its auto-phosphorylation ability. Immunolocalization studies reveal that the protein is mainly cytosolic under normal growing conditions but gets translocated into the nucleus under stress conditions. Knockdown of EiMAPK15 using double-stranded RNA was found to reduce the expression of other encystation-specific genes which in turn, resulted in the decline of the overall encystation efficiency of the cells. Overall, the present work has laid the platform for further characterization of this important MAPK gene in Entamoeba invadens.
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Affiliation(s)
- Tanya Singh
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal, 721302, India.
| | - Tarun Agarwal
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal, 721302, India.
| | - Sudip Kumar Ghosh
- Department of Biotechnology, Indian Institute of Technology Kharagpur, West Bengal, 721302, India.
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Soto C, Bergado G, Blanco R, Griñán T, Rodríguez H, Ros U, Pazos F, Lanio ME, Hernández AM, Álvarez C. Sticholysin II-mediated cytotoxicity involves the activation of regulated intracellular responses that anticipates cell death. Biochimie 2018; 148:18-35. [DOI: 10.1016/j.biochi.2018.02.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 02/07/2018] [Indexed: 12/12/2022]
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Mammone T, Chidlow G, Casson RJ, Wood JPM. Expression and activation of mitogen-activated protein kinases in the optic nerve head in a rat model of ocular hypertension. Mol Cell Neurosci 2018; 88:270-291. [PMID: 29408550 DOI: 10.1016/j.mcn.2018.01.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 01/03/2018] [Accepted: 01/11/2018] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Glaucoma is a leading cause of irreversible blindness manifesting as an age-related, progressive optic neuropathy with associated retinal ganglion cell (RGC) loss. Mitogen-activated protein kinases (MAPKs: p42/44 MAPK, SAPK/JNK, p38 MAPK) are activated in various retinal disease models and likely contribute to the mechanisms of RGC death. Although MAPKs play roles in the development of retinal pathology, their action in the optic nerve head (ONH), where the initial insult to RGC axons likely resides in glaucoma, remains unexplored. METHODS An experimental paradigm representing glaucoma was established by induction of chronic ocular hypertension (OHT) via laser-induced coagulation of the trabecular meshwork in Sprague-Dawley rats. MAPKs were subsequently investigated over the following days for expression and activity alterations, using RT-PCR, immunohistochemistry and Western immunoblot. RESULTS p42/44 MAPK expression was unaltered after intraocular pressure (IOP) elevation, but there was a significant activation of this enzyme in ONH astrocytes after 6-24 h. Activated SAPK/JNK isoforms were present throughout healthy RGC axons but after IOP elevation or optic nerve crush, they both accumulated at the ONH, likely due to RGC axon transport disruption, and were subject to additional activation. p38 MAPK was expressed by a population of microglia which were significantly more populous following IOP elevation. However it was only significantly activated in microglia after 3 days, and then only in the ONH and optic nerve; in the retina it was solely activated in RGC perikarya. CONCLUSIONS In conclusion, each of the MAPKs showed a specific spatio-temporal expression and activation pattern in the retina, ONH and optic nerve as a result of IOP elevation. These findings likely reflect the roles of the individual enzymes, and the cells in which they reside, in the developing pathology following IOP elevation. These data have implications for understanding the mechanisms of ocular pathology in diseases such as glaucoma.
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Affiliation(s)
- Teresa Mammone
- Ophthalmic Research Laboratories, Central Adelaide Local Health Network, Level 7 Adelaide Health & Medical Sciences Building, University of Adelaide, Adelaide, South Australia, Australia; Department of Ophthalmology and Visual Sciences, University of Adelaide, Adelaide, South Australia, Australia.
| | - Glyn Chidlow
- Ophthalmic Research Laboratories, Central Adelaide Local Health Network, Level 7 Adelaide Health & Medical Sciences Building, University of Adelaide, Adelaide, South Australia, Australia; Department of Ophthalmology and Visual Sciences, University of Adelaide, Adelaide, South Australia, Australia.
| | - Robert J Casson
- Ophthalmic Research Laboratories, Central Adelaide Local Health Network, Level 7 Adelaide Health & Medical Sciences Building, University of Adelaide, Adelaide, South Australia, Australia; Department of Ophthalmology and Visual Sciences, University of Adelaide, Adelaide, South Australia, Australia.
| | - John P M Wood
- Ophthalmic Research Laboratories, Central Adelaide Local Health Network, Level 7 Adelaide Health & Medical Sciences Building, University of Adelaide, Adelaide, South Australia, Australia; Department of Ophthalmology and Visual Sciences, University of Adelaide, Adelaide, South Australia, Australia.
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Han A, Zou L, Gan X, Li Y, Liu F, Chang X, Zhang X, Tian M, Li S, Su L, Sun Y. ROS generation and MAPKs activation contribute to the Ni-induced testosterone synthesis disturbance in rat Leydig cells. Toxicol Lett 2018; 290:36-45. [PMID: 29567110 DOI: 10.1016/j.toxlet.2018.03.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 03/07/2018] [Accepted: 03/13/2018] [Indexed: 01/23/2023]
Abstract
Nickel (Ni) can disorder testosterone synthesis in rat Leydig cells, whereas the mechanisms remain unclear. The aim of this study was to investigate the role of reactive oxygen species (ROS) and mitogen-activated protein kinases (MAPKs) in Ni-induced disturbance of testosterone synthesis in rat Leydig cells. The testosterone production and ROS levels were detected in Leydig cells. The mRNA and protein levels of testosterone synthetase, including StAR, CYP11A1, 3β-HSD, CYP17A1 and 17β-HSD, were determined. Effects of Ni on the ERK1/2, p38 and JNK MAPKs were also investigated. The results showed that Ni triggered ROS generation, consequently resulted in the decrease of testosterone synthetase expression and testosterone production in Leydig cells, which were then attenuated by ROS scavengers of N-acetylcysteine (NAC) and 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO), indicating that ROS are involved in the Ni-induced testosterone biosynthesis disturbance. Meanwhile Ni activated the ERK1/2, p38 and JNK MAPKs. Furthermore, Ni-inhibited testosterone synthetase expression levels and testosterone secretion were all alleviated by co-treatment with MAPK specific inhibitors (U0126 and SB203580, respectively), implying that Ni inhibited testosterone synthesis through activating ERK1/2 and p38 MAPK signal pathways in Leydig cells. In conclusion, these findings suggest that Ni causes testosterone synthesis disorder, partly, via ROS and MAPK signal pathways.
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Affiliation(s)
- Aijie Han
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Lingyue Zou
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Xiaoqin Gan
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Yu Li
- Department of Infectious Diseases, Shaanxi Provincial People's hospital, Xi'an 710068, China
| | - Fangfang Liu
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Xuhong Chang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Xiaotian Zhang
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Minmin Tian
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China
| | - Sheng Li
- Lanzhou Municipal Center for Disease Control, Lanzhou, China
| | - Li Su
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China.
| | - Yingbiao Sun
- Department of Toxicology, School of Public Health, Lanzhou University, Lanzhou 730000, China.
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Luna C, Mendoza N, Casao A, Pérez-Pé R, Cebrián-Pérez JA, Muiño-Blanco T. c-Jun N-terminal kinase and p38 mitogen-activated protein kinase pathways link capacitation with apoptosis and seminal plasma proteins protect sperm by interfering with both routes†. Biol Reprod 2018; 96:800-815. [PMID: 28379343 DOI: 10.1093/biolre/iox017] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 03/28/2017] [Indexed: 12/18/2022] Open
Abstract
The mitogen-activated protein kinase (MAPK), c-Jun N-terminal kinase (JNK), and p38 MAP kinase (p38) signaling cascades are involved in triggering apoptosis in somatic cells. Given that spermatozoa are able to undergo apoptosis, we tested the hypothesis that these pathways might be functional in ram spermatozoa as two signal transduction mechanisms that contribute to the modulation of capacitation and apoptosis. Indirect immunofluorescence and western blot analysis evidenced the presence of JNK and p38 in ram spermatozoa. To verify the involvement of these enzymes in sperm physiology, we determined the effect of specific inhibitors of JNK or p38 on in vitro capacitation induced with either cAMP-elevating agents or epidermal growth factor (EGF). Both inhibitions reduced the EGF-induced capacitation with a decrease in the chlortetracycline capacitated-sperm pattern, protein tyrosine phosphorylation, phosphatidylserine externalization, caspase-3 and -7 activation, and the proportion of DNA-damaged spermatozoa. No significant changes were found in the high-cAMP capacitated samples. The addition of 3.4 mg/ml seminal plasma proteins (SPPs) to the EGF-containing samples, either alone or together with each inhibitor, resulted in a decreased proportion of capacitated sperm pattern, protein tyrosine phosphorylation, loss of plasma membrane integrity, and apoptotic alterations. Furthermore, SPPs significantly reduced the phosphorylation level of JNK and p38 MAPK (active forms). These findings show a relationship between capacitation and apoptosis, and represent a step forward in the knowledge of the SPP protective mechanism in spermatozoa.
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Antileukemic effect of paclitaxel in combination with metformin in HL-60 cell line. Gene 2018; 647:213-220. [DOI: 10.1016/j.gene.2018.01.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 01/04/2018] [Indexed: 12/17/2022]
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Yada T, Mekuchi M, Ojima N. Molecular biology and functional genomics of immune-endocrine interactions in the Japanese eel, Anguilla japonica. Gen Comp Endocrinol 2018; 257:272-279. [PMID: 29108728 DOI: 10.1016/j.ygcen.2017.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 10/03/2017] [Accepted: 11/02/2017] [Indexed: 10/18/2022]
Abstract
Immune-endocrine interactions are an important pathogen resistance mechanism in fish. We review the immune-endocrine interactions in the Japanese eel, Anguilla japonica, with special reference to high throughput gene sequencing. These data may be relevant to the significant decrease in the eel harvest in recent years and will aid in the selection of appropriate disease-resistant strains for aquaculture. More than 1000 sequences that whose expression in elvers responded to air exposure were identified through comprehensive gene expression analysis using next-generation sequencing. These included transcription factors within the MAPK pathway. Significant changes in expression after air exposure were detected by quantitative polymerase chain reaction analysis in many genes related to disease resistance. These factors include innate immune system factors and cytokines that interact with the endocrine system during the stress response. Other applications of immune-endocrine interactions in eel culture are discussed.
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Affiliation(s)
- Takashi Yada
- Freshwater Fisheries Research Center, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Nikko, Japan.
| | - Miyuki Mekuchi
- Research Center for Bioinformatics and Biosciences, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Yokohama, Japan
| | - Nobuhiko Ojima
- Research Center for Bioinformatics and Biosciences, National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, Yokohama, Japan
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Ahmad MK, Abdollah NA, Shafie NH, Yusof NM, Razak SRA. Dual-specificity phosphatase 6 (DUSP6): a review of its molecular characteristics and clinical relevance in cancer. Cancer Biol Med 2018; 15:14-28. [PMID: 29545965 PMCID: PMC5842331 DOI: 10.20892/j.issn.2095-3941.2017.0107] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Mitogen-activated protein kinases (MAPKs) are the main regulators of cellular proliferation, growth, and survival in physiological or pathological conditions. Aberrant MAPK signaling plays a pivotal role in carcinogenesis, which leads to development and progression of human cancer. Dual-specificity phosphatase 6 (DUSP6), a member of the MAPK phosphatase family, interacts with specifically targeted extracellular signal-regulated kinase 1/2 via negative feedback regulation in the MAPK pathway of mammalian cells. This phosphatase functions in a dual manner, pro-oncogenic or tumor-suppressive, depending on the type of cancer. To date, the tumor-suppressive role of DUSP6 has been demonstrated in pancreatic cancer, non-small cell lung cancer, esophageal squamous cell and nasopharyngeal carcinoma, and ovarian cancer. Its pro-oncogenic role has been observed in human glioblastoma, thyroid carcinoma, breast cancer, and acute myeloid carcinoma. Both roles of DUSP6 have been documented in malignant melanoma depending on the histological subtype of the cancer. Loss- or gain-of-function effects of DUSP6 in these cancers highlights the significance of this phosphatase in carcinogenesis. Development of methods that use the DUSP6 gene as a therapeutic target for cancer treatment or as a prognostic factor for diagnosis and evaluation of cancer treatment outcome has great potential. This review focuses on molecular characteristics of the DUSP6 gene and its role in cancers in the purview of development, progression, and cancer treatment outcome.
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Affiliation(s)
- Muhammad Khairi Ahmad
- Oncological and Radiological Sciences Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Pulau Pinang 13200, Malaysia
| | - Nur Ainina Abdollah
- Oncological and Radiological Sciences Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Pulau Pinang 13200, Malaysia
| | - Nurul Husna Shafie
- Oncological and Radiological Sciences Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Pulau Pinang 13200, Malaysia
| | - Narazah Mohd Yusof
- Oncological and Radiological Sciences Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Pulau Pinang 13200, Malaysia
| | - Siti Razila Abdul Razak
- Oncological and Radiological Sciences Cluster, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Kepala Batas, Pulau Pinang 13200, Malaysia
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Proteomic Analysis Reveals Coordinated Regulation of Anthocyanin Biosynthesis through Signal Transduction and Sugar Metabolism in Black Rice Leaf. Int J Mol Sci 2017; 18:ijms18122722. [PMID: 29244752 PMCID: PMC5751323 DOI: 10.3390/ijms18122722] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 12/06/2017] [Accepted: 12/12/2017] [Indexed: 02/08/2023] Open
Abstract
Black rice (Oryza sativa L.) is considered to be a healthy food due to its high content of anthocyanins in the pericarp. The synthetic pathway of anthocyanins in black rice grains has been identified, however, the proteomic profile of leaves during grain development is still unclear. Here, isobaric Tags Relative and Absolute Quantification (iTRAQ) MS/MS was carried out to identify statistically significant changes of leaf proteome in the black rice during grain development. Throughout three sequential developmental stages, a total of 3562 proteins were detected and 24 functional proteins were differentially expressed 3–10 days after flowering (DAF). The detected proteins are known to be involved in various biological processes and most of these proteins were related to gene expression regulatory (33.3%), signal transduction (16.7%) and developmental regulation and hormone-like proteins (12.5%). The coordinated changes were consistent with changes in regulatory proteins playing a leading role in leaves during black rice grain development. This indicated that signal transduction between leaves and grains may have an important role in anthocyanin biosynthesis and accumulation during grain development of black rice. In addition, four identified up-regulated proteins associated with starch metabolism suggested that the remobilization of nutrients for starch synthesis plays a potential role in anthocyanin biosynthesis of grain. The mRNA transcription for eight selected proteins was validated with quantitative real-time PCR. Our results explored the proteomics of the coordination between leaf and grain in anthocyanins biosynthesis of grain, which might be regulated by signal transduction and sugar metabolism in black rice leaf.
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128
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Haider MS, Kurjogi MM, Khalil-Ur-Rehman M, Fiaz M, Pervaiz T, Jiu S, Haifeng J, Chen W, Fang J. Grapevine immune signaling network in response to drought stress as revealed by transcriptomic analysis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2017; 121:187-195. [PMID: 29127881 DOI: 10.1016/j.plaphy.2017.10.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 10/26/2017] [Accepted: 10/26/2017] [Indexed: 05/01/2023]
Abstract
Drought is a ubiquitous abiotic factor that severely impedes growth and development of horticulture crops. The challenge postured by global climate change is the evolution of drought-tolerant cultivars that could cope with concurrent stress. Hence, in this study, biochemical, physiological and transcriptome analysis were investigated in drought-treated grapevine leaves. The results revealed that photosynthetic activity and reducing sugars were significantly diminished which were positively correlated with low stomatal conductance and CO2 exchange in drought-stressed leaves. Further, the activities of superoxide dismutase, peroxidase, and catalase were significantly actuated in the drought-responsive grapevine leaves. Similarly, the levels of abscisic acid and jasmonic acid were also significantly increased in the drought-stressed leaves. In transcriptome analysis, 12,451 differentially-expressed genes (DEGs) were annotated, out of which 8021 DEGs were up-regulated and 4430 DEGs were down-regulated in response to drought stress. In addition, the genes encoding pathogen-associated molecular pattern (PAMP) triggered immunity (PTI), including calcium signals, protein phosphatase 2C, calcineurin B-like proteins, MAPKs, and phosphorylation (FLS2 and MEKK1) cascades were up-regulated in response to drought stress. Several genes related to plant-pathogen interaction pathway (RPM1, PBS1, RPS5, RIN4, MIN7, PR1, and WRKYs) were also found up-regulated in response to drought stress. Overall the results of present study showed the dynamic interaction of DEG in grapevine physiology which provides the premise for selection of defense-related genes against drought stress for subsequent grapevine breeding programs.
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Affiliation(s)
- Muhammad S Haider
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - Mahantesh M Kurjogi
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - M Khalil-Ur-Rehman
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - Muhammad Fiaz
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - Tariq Pervaiz
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - Songtao Jiu
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - Jia Haifeng
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - Wang Chen
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China
| | - Jinggui Fang
- Key Laboratory of Genetics and Fruit Development, College of Horticulture, Nanjing Agricultural University, Tongwei Road 6, Nanjing 210095, PR China.
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129
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Banerjee S, Sinha K, Chowdhury S, Sil PC. Unfolding the mechanism of cisplatin induced pathophysiology in spleen and its amelioration by carnosine. Chem Biol Interact 2017; 279:159-170. [PMID: 29191451 DOI: 10.1016/j.cbi.2017.11.019] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 11/17/2017] [Accepted: 11/26/2017] [Indexed: 12/27/2022]
Abstract
cis-Diamminedichloroplatinum (cisplatin) is an effective chemotherapeutic and is widely used for the treatment of various types of solid tumors. Bio-distribution of cisplatin to other organs due to poor targeting towards only cancer cells constitutes the backbone of cisplatin-induced toxicity. The adverse effect of this drug on spleen is not well characterized so far. Therefore, we have set our goal to explore the mechanism of the cisplatin-induced pathophysiology of the spleen and would also like to evaluate whether carnosine, an endogenous neurotransmitter and antioxidant, can ameliorate this pathophysiological response. We found a dose and time-dependent increase of the pro-inflammatory cytokine, TNF-α, in the spleen tissue of the experimental mice exposed to 10 and 20 mg/kg body weight of cisplatin. The increase in inflammatory cytokine can be attributed to the activation of the transcription factor, NF-ĸB. This also aids in the transcription of other pro-inflammatory cytokines and cellular adhesion molecules. Exposure of animals to cisplatin at both the doses resulted in ROS and NO production leading to oxidative stress. The MAP Kinase pathway, especially JNK activation, was also triggered by cisplatin. Eventually, the persistence of inflammatory response and oxidative stress lead to apoptosis through extrinsic pathway. Carnosine has been found to restore the expression of inflammatory molecules and catalase to normal levels through inhibition of pro-inflammatory cytokines, oxidative stress, NF-ĸB and JNK. Carnosine also protected the splenic cells from apoptosis. Our study elucidated the detailed mechanism of cisplatin-induced spleen toxicity and use of carnosine as a protective agent against this cytotoxic response.
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Affiliation(s)
- Sharmistha Banerjee
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Kolkata 700054, India
| | - Krishnendu Sinha
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Kolkata 700054, India
| | - Sayantani Chowdhury
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Kolkata 700054, India
| | - Parames C Sil
- Division of Molecular Medicine, Bose Institute, P-1/12, CIT Scheme VII M, Kolkata 700054, India.
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130
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Tessier SN, Zhang Y, Wijenayake S, Storey KB. MAP kinase signaling and Elk1 transcriptional activity in hibernating thirteen-lined ground squirrels. Biochim Biophys Acta Gen Subj 2017; 1861:2811-2821. [DOI: 10.1016/j.bbagen.2017.07.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 07/07/2017] [Accepted: 07/31/2017] [Indexed: 12/13/2022]
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131
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Tine M. Evidence of the Complexity of Gene Expression Analysis in Fish Wild Populations. Int J Genomics 2017; 2017:1258396. [PMID: 29201893 PMCID: PMC5672613 DOI: 10.1155/2017/1258396] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 08/24/2017] [Accepted: 09/18/2017] [Indexed: 11/17/2022] Open
Abstract
The present work examines the induction of the band 3 anion transport protein, mitogen-activated protein kinase, and lactate dehydrogenase, respectively related to osmolyte transport, cell volume regulation, and energy production in the gills of two tilapia strains exposed to either freshwater or hypersaline water. Overall, genes showed similar expression patterns between strains. However, a wild population survey across a range of natural habitats and salinities did not reveal the expected patterns. Although significant, the correlations between gene expression and salinity were slightly ambiguous and did not show any link with phenotypic differences in life history traits previously reported between the same populations. The differential expression was also not associated with the population genetic structure inferred from neutral markers. The results suggest that the differential expression observed is not the result of evolutionary forces such as genetic drift or adaptation by natural selection. Instead, it can be speculated that genes responded to various abiotic and biotic stressors, including factors intrinsic to animals. This study provides clear evidence of the complexity of gene expression analysis in wild populations and shows that more attention needs to be paid when selecting candidates as potential biomarkers for monitoring adaptive responses to a specific environmental perturbation.
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Affiliation(s)
- Mbaye Tine
- UFR des Sciences Agronomiques, de l'Aquaculture et des Technologies Alimentaires (UFR S2ATA), Universite Gaston Berger (UGB), Route de Ngallele BP 234, Saint-Louis, Senegal
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132
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Nguyen NU, Stamper BD. Polyphenols reported to shift APAP-induced changes in MAPK signaling and toxicity outcomes. Chem Biol Interact 2017; 277:129-136. [PMID: 28918124 DOI: 10.1016/j.cbi.2017.09.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/09/2017] [Accepted: 09/11/2017] [Indexed: 12/20/2022]
Abstract
Due to its widespread availability, acetaminophen (APAP) is the leading cause for drug-induced liver injury in many countries including United States and United Kingdom. When used as recommended, APAP is relatively safe. However, in overdose cases, increased metabolism of APAP to N-acetyl-para-benzoquinoneimine (NAPQI), a reactive metabolite, leads to glutathione (GSH) depletion, oxidative stress, and cellular injury. Throughout this process, a variety of factors play important roles in propagating toxicity, including c-Jun N-terminal kinase (JNK), a member of the mitogen-activated protein kinase (MAPK) family. Because of its involvement in multiple cellular processes, biomarkers associated with MAPK signaling have generated interest as a mechanistic target for protecting against APAP-induced liver injury and hepatocellular injury, in general. This review summarizes mechanistic details by which natural products, specifically those containing polyphenolic moieties, are capable of attenuating APAP-induced toxicity, at least in part through an ability to modulate MAPKs. These compounds include carnosic acid, chlorogenic acid, davallialactone, extracts from Hibiscus sabdariffa, quercetin-based compounds, and resveratrol. Despite variations in the experimental designs across these studies, common pathways and biomarkers were implicated in cytoprotection when polyphenolic compounds were given with APAP, such as enhanced antioxidant gene expression and reversal of APAP-induced changes in oxidative stress markers and MAPK signaling. Overall, an emphasis should be placed on method standardization for future studies if we are to gain a more in-depth understanding of how polyphenolic moieties contribute to cytoprotection during an APAP overdose event.
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Affiliation(s)
- Ngoc Uy Nguyen
- Pacific University College of Arts & Sciences, 2043 College Way UC #4882, Forest Grove, OR 97116, USA.
| | - Brendan David Stamper
- Pacific University School of Pharmacy, 222 S.E. 8th Avenue #451, Hillsboro, OR 97123, USA.
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133
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Schmitz M, Ziv T, Admon A, Baekelandt S, Mandiki SN, L'Hoir M, Kestemont P. Salinity stress, enhancing basal and induced immune responses in striped catfish Pangasianodon hypophthalmus (Sauvage). J Proteomics 2017; 167:12-24. [DOI: 10.1016/j.jprot.2017.08.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 08/02/2017] [Accepted: 08/03/2017] [Indexed: 12/12/2022]
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134
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Wu CW, Tessier SN, Storey KB. Regulation of the insulin-Akt signaling pathway and glycolysis during dehydration stress in the African clawed frog Xenopus laevis. Biochem Cell Biol 2017; 95:663-671. [PMID: 28708941 DOI: 10.1139/bcb-2017-0117] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Estivation is an adaptive stress response utilized by some amphibians during periods of drought in the summer season. In this study, we examine the regulation of the insulin signaling cascade and glycolysis pathway in the African clawed frog Xenopus laevis during the dehydration stress induced state of estivation. We show that in the brain and heart of X. laevis, dehydration reduces the phosphorylation of the insulin growth factor-1 receptor (IGF-1R), and this is followed by similar reductions in the phosphorylation of the Akt and mechanistic target of rapamycin (mTOR) kinase. Interestingly, phosphorylation levels of IGF-1R and mTOR were not affected in the kidney, and phosphorylation levels of P70S6K and the ribosomal S6 protein were elevated during dehydration stress. Animals under estivation are also susceptible to periods of hypoxia, suggesting that glycolysis may also be affected. We observed that protein levels of many glycolytic enzymes remained unchanged during dehydration; however, the hypoxia response factor-1 alpha (HIF-1α) protein was elevated by greater than twofold in the heart during dehydration. Overall, we provide evidence that shows that the insulin signaling pathway in X. laevis is regulated in a tissue-specific manner during dehydration stress and suggests an important role for this signaling cascade in mediating the estivation response.
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Affiliation(s)
- Cheng-Wei Wu
- Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6, Canada.,Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6, Canada
| | - Shannon N Tessier
- Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6, Canada.,Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6, Canada
| | - Kenneth B Storey
- Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6, Canada.,Institute of Biochemistry and Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, K1S 5B6, Canada
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135
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Arfat Y, Chang H, Gao Y. Stress-responsive microRNAs are involved in re-programming of metabolic functions in hibernators. J Cell Physiol 2017; 233:2695-2704. [PMID: 28574587 DOI: 10.1002/jcp.26034] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 06/01/2017] [Indexed: 12/21/2022]
Abstract
Mammalian hibernation includes re-programing of metabolic capacities, partially, encouraged by microRNAs (miRNAs). Albeit much is known about the functions of miRNAs, we need learning on low temperature miRNAs target determination. As hibernators can withstand low body temperatures (TB) for a long time without anguish tissue damage, understanding the means and mechanisms that empower them to do as such are of restorative intrigue. Nonetheless, these mechanisms by which miRNAs and the hibernators react to stressful conditions are not much clear. It is evident from recent data that the gene expression and the translation of mRNA to protein are controlled by miRNAs. The miRNAs also influence regulation of major cellular processes. As the significance of miRNAs in stress conditions adaptation are getting clearer, this audit article abridges the key alterations in miRNA expression and the mechanism that facilitates stress survival.
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Affiliation(s)
- Yasir Arfat
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, China.,Key Laboratory of Resource Biology and Biotechnology in Western China (College of Life Sciences, Northwest University), Ministry of Education, Xi'an, China
| | - Hui Chang
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, China.,Key Laboratory of Resource Biology and Biotechnology in Western China (College of Life Sciences, Northwest University), Ministry of Education, Xi'an, China
| | - Yunfang Gao
- Shaanxi Key Laboratory for Animal Conservation, Northwest University, Xi'an, China.,Key Laboratory of Resource Biology and Biotechnology in Western China (College of Life Sciences, Northwest University), Ministry of Education, Xi'an, China
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136
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Leite FGG, Torres AA, De Oliveira LC, Da Cruz AFP, Soares-Martins JAP, Pereira ACTC, Trindade GS, Abrahão JS, Kroon EG, Ferreira PCP, Bonjardim CA. c-Jun integrates signals from both MEK/ERK and MKK/JNK pathways upon vaccinia virus infection. Arch Virol 2017. [PMID: 28620810 DOI: 10.1007/s00705-017-3446-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Usurpation of the host's signalling pathways is a common strategy employed by viruses to promote their successful replication. Here we show that infection with the orthopoxvirus vaccinia virus (VACV) leads to sustained stimulation of c-Jun activity during the entire infective cycle. This stimulation is temporally regulated through MEK/ERK or MKK/JNK pathways, i.e. during the early/mid phase (1 to 6 hpi) and in the late phase (9 to 24 hpi) of the infective cycle, respectively. As a transcriptional regulator, upon infection with VACV, c-Jun is translocated from the cytoplasm to the nucleus, where it binds to the AP-1 DNA sequence found at the promoter region of its target genes. To investigate the role played by c-Jun during VACV replication cycle, we generated cell lines that stably express a c-Jun-dominant negative (DNc-Jun) mutation. Our data revealed that c-Jun is required during early infection to assist with viral DNA replication, as demonstrated by the decreased amount of viral DNA found in the DNc-Jun cells. We also demonstrated that c-Jun regulates the expression of the early growth response gene (egr-1), a gene previously shown to affect VACV replication mediated by MEK/ERK signalling. VACV-induced stimulation of the MKK/JNK/JUN pathway impacts viral dissemination, as we observed a significant reduction in both viral yield, during late stages of infection, and virus plaque size. Collectively, our data suggest that, by modulating the host's signalling pathways through a common target such as c-Jun, VACV temporally regulates its infective cycle in order to successfully replicate and subsequently spread.
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Affiliation(s)
- Flávia G G Leite
- Signal Transduction Group/Orthopoxviruses, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Cellular Signalling and Cytoskeletal function Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK
| | - Alice A Torres
- Signal Transduction Group/Orthopoxviruses, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,University of Cambridge, Tennis Court Road, Cambridge, CB2 1QP, UK
| | - Leonardo C De Oliveira
- Signal Transduction Group/Orthopoxviruses, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - André F P Da Cruz
- Signal Transduction Group/Orthopoxviruses, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Jamária A P Soares-Martins
- Signal Transduction Group/Orthopoxviruses, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Department of Math and Science, Waukesha County Technical College, 800 Main Street, Pewaukee, WI, 53072, USA
| | - Anna C T C Pereira
- Signal Transduction Group/Orthopoxviruses, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.,Laboratory of Biochemistry and Biology of Microorganisms and Plants, Universidade Federal do Piauí, Campus de Parnaíba, Av. São Sebastião, 2819, Bairro Reis Velloso, Parnaíba, PI, CEP 64202-020, Brazil
| | - Giliane S Trindade
- Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Jonatas S Abrahão
- Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Erna G Kroon
- Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Paulo C P Ferreira
- Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil
| | - Cláudio A Bonjardim
- Signal Transduction Group/Orthopoxviruses, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil. .,Laboratório de Vírus, Department of Microbiology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.
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137
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Hu S, Rao M, Lei H, Wu Y, Wang Y, Ke D, Xia W, Zhu C. Expression patterns of p38αMAPK during follicular development in the ovaries of neonatal rats. Acta Histochem 2017; 119:538-542. [PMID: 28606727 DOI: 10.1016/j.acthis.2017.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 05/17/2017] [Accepted: 05/17/2017] [Indexed: 01/02/2023]
Abstract
The p38αMAPK signaling pathway plays a critical role in female reproduction, but an understanding of its expression in rats remains elusive. This study was carried out to investigate the temporal and spatial expression of p38αMAPK and p-p38αMAPK. Ovarian tissue samples were collected from 2-, 4-, 8-, 12-, 16-, 20- and 30-day-old female rats. Western blotting was used to examine the relative expression of p38αMAPK and p-p38αMAPK in ovarian tissue, and subcellular localization was examined using immunohistochemistry of the rat ovaries at different ages of postpartum. The immunohistochemical results showed that p38αMAPK and p-p38αMAPK were widely expressed in the rat ovaries, mainly localized in the follicle cells and granulosa cells. The expression of p38αMAPK was relatively stable for the different stages of oocytes, whereas the expression of p-p38αMAPK gradually increased. At different stages of granulosa cells, the expression of p38αMAPK was also relatively stable, and the p-p38αMAPK expression showed an upward trend during follicular development. Western blotting revealed that the expression of p38αMAPK in the ovaries was relatively stable, where as p-p38αMAPK expression initially exhibited an increasing trend and subsequently decreased, with a maximum at day 20. The expression patterns of p38αMAPK and p-p38αMAPK in the rat ovaries indicate their possible involvement in folliculogenesis. Taken together, the stage- and cell-specific expression of p-p38αMAPK in rat ovaries indicated that p-p38αMAPK might play a vital role during rat follicular development.
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138
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Neuhaus W, Krämer T, Neuhoff A, Gölz C, Thal SC, Förster CY. Multifaceted Mechanisms of WY-14643 to Stabilize the Blood-Brain Barrier in a Model of Traumatic Brain Injury. Front Mol Neurosci 2017; 10:149. [PMID: 28603485 PMCID: PMC5445138 DOI: 10.3389/fnmol.2017.00149] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Accepted: 05/03/2017] [Indexed: 12/27/2022] Open
Abstract
The blood-brain barrier (BBB) is damaged during ischemic insults such as traumatic brain injury or stroke. This contributes to vasogenic edema formation and deteriorate disease outcomes. Enormous efforts are pursued to understand underlying mechanisms of ischemic insults and develop novel therapeutic strategies. In the present study the effects of PPARα agonist WY-14643 were investigated to prevent BBB breakdown and reduce edema formation. WY-14643 inhibited barrier damage in a mouse BBB in vitro model of traumatic brain injury based on oxygen/glucose deprivation in a concentration dependent manner. This was linked to changes of the localization of tight junction proteins. Furthermore, WY-14643 altered phosphorylation of kinases ERK1/2, p38, and SAPK/JNK and was able to inhibit proteosomal activity. Moreover, addition of WY-14643 upregulated PAI-1 leading to decreased t-PA activity. Mouse in vivo experiments showed significantly decreased edema formation in a controlled cortical impact model of traumatic brain injury after WY-14643 application, which was not found in PAI-1 knockout mice. Generally, data suggested that WY-14643 induced cellular responses which were dependent as well as independent from PPARα mediated transcription. In conclusion, novel mechanisms of a PPARα agonist were elucidated to attenuate BBB breakdown during traumatic brain injury in vitro.
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Affiliation(s)
- Winfried Neuhaus
- Competence Unit Molecular Diagnostics, Competence Center Health and Bioresources, AIT Austrian Institute of Technology (AIT) GmbHVienna, Austria
| | - Tobias Krämer
- Department of Anesthesiology, Medical Center of Johannes Gutenberg University of MainzMainz, Germany
| | - Anja Neuhoff
- Department of Anesthesia and Critical Care, Center of Operative Medicine, University Hospital WürzburgWürzburg, Germany
| | - Christina Gölz
- Department of Anesthesiology, Medical Center of Johannes Gutenberg University of MainzMainz, Germany
| | - Serge C Thal
- Department of Anesthesiology, Medical Center of Johannes Gutenberg University of MainzMainz, Germany
| | - Carola Y Förster
- Department of Anesthesia and Critical Care, Center of Operative Medicine, University Hospital WürzburgWürzburg, Germany
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Wang D, Liu Y, Zhong G, Wang Y, Zhang T, Zhao Z, Yan X, Liu Q. Compatibility of Tanshinone IIA and Astragaloside IV in attenuating hypoxia-induced cardiomyocytes injury. JOURNAL OF ETHNOPHARMACOLOGY 2017; 204:67-76. [PMID: 28389356 DOI: 10.1016/j.jep.2017.03.053] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 03/24/2017] [Accepted: 03/31/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Herbal medicines including Tanshinone IIA (TanIIA) and Astragaloside IV (AsIV) are widely used in Asia as therapeutic agents for cardiovascular diseases, due to their complementary roles and shared properties based on the theory of traditional Chinese medicine and pharmacological researches. However, the underlying pathological mechanisms for their efficacy are still unclear. In addition, the compatibility or incompatibility of the herbal medicines when administered with other herbal remedies or with prescription drugs is unknown. AIM OF THE STUDY We aimed to investigate the compatibility of TanIIA and AsIV in protecting cardiomyocytes against hypoxia-induced injury. MATERIALS AND METHODS Cultured cardiomyocytes were stimulated in hypoxia condition, in the absence or presence of the two herbal compounds, TanIIA and AsIV. Indicators were determined by cytotoxicity assay, quantitative PCR, ELISA, flow cytometry assay, immunofluorescence staining and western blot. RESULTS Either TanIIA alone or the combined herbal compounds inhibited hypoxia-triggered chemokines production including CCL2/5/19, CXCL2 and Transwell assay-indicated monocyte/macrophage recruitment, cytokines production including TNF-α and IL-6. While AsIV alone or the combined herbal compounds attenuated hypoxia-induced cell apoptosis indicated by decreased Annexin V+ cells and the ratio of Bax/Bcl-2, but no significant effect of the herbal compounds was observed in modulating cell apoptosis following both hypoxia and TNF-α stimulation. As an anti-apoptotic factor, stress granule formation was further enhanced by AsIV alone or the combined herbal compounds in hypoxia or heat shock stress. Moreover, immunoblotting analysis indicated that stress-responsive mitogen-activated protein kinases (MAPK) pathways including the phosphorylation of ERK1/2, p38 and JNK were inhibited while the phosphorylation of Akt in phosphatidylinositol 3-kinase (PI3K) -Akt pathway for cell survival was restored by the herbal compounds. Among these results, the combination of TanIIA and AsIV comprised most of the beneficial properties tested, although their combination did not improve the maximal effects achieved by any of the compounds alone. CONCLUSIONS Taken together, these data suggest a compatibility of TanIIA and AsIV in protecting cardiomyocyte against hypoxia-induced injury.
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Affiliation(s)
- Dawei Wang
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China; Emergency Department, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China; Guangdong Provincial Key Laboratory of Research on Emergency in TCM, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510405, China
| | - Yuntao Liu
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China; Emergency Department, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, China; Guangdong Provincial Key Laboratory of Research on Emergency in TCM, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou 510405, China
| | - Guofu Zhong
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Yuanyuan Wang
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Tong Zhang
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Zhen Zhao
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Xia Yan
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China
| | - Qing Liu
- The Second Clinical School of Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510405, China.
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Sathish Kumar P, Viswanathan MBG, Venkatesan M, Balakrishna K. Bauerenol, a triterpenoid from Indian Suregada angustifolia: Induces reactive oxygen species–mediated P38MAPK activation and apoptosis in human hepatocellular carcinoma (HepG2) cells. Tumour Biol 2017; 39:1010428317698387. [DOI: 10.1177/1010428317698387] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The triterpenoid, bauerenol, from Suregada angustifolia (Baill. ex Muell.-Arg.) Airy Shaw (Euphorbiaceae) was screened for anti-cancer property using hepatocellular carcinoma cell line, HepG2. Bauerenol exhibited growth inhibitory and apoptosis inducing potential against HepG2 cancer cells. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide cytotoxic assay revealed that bauerenol treatment significantly reduced the growth of HepG2 cells in a time- and dose-dependent manner with 50% growth inhibitory concentration doses of 45 and 25 µg/mL at 24 and 48 h treatments, respectively. Bauerenol-induced cell death reflected apoptotic morphological features, that is, cell membrane blebbing, vacuolization, chromatin condensation, and nuclear fragmentation. In addition, bauerenol treatment diminished the mitochondrial membrane potential, by inducing the efflux of cytochrome c, downregulating the levels of anti-apoptotic Bcl-2 as well as upregulating the levels of pro-apoptotic Bax, and inducing caspase activation and poly (ADP-ribose) polymerase cleavage. Moreover, bauerenol treatment activates p38MAPK and inactivates the anti-apoptotic kinases Akt and ERK1/2 through the induction of reactive oxygen species. Furthermore, bauerenol-mediated S-phase arrest was associated with downregulation of cell cycle-rate-limiting factor (cyclin D1) and upregulation of cyclin-dependent kinase inhibitor p21 and tumor suppressor p53. Interestingly, pre-treatment of cells with reactive oxygen species inhibitor and p38 inhibitor significantly decreases bauerenol-induced cytotoxicity, Bax upregulation, and p38 activation. This study clearly states that bauerenol induces cell cycle arrest and apoptosis through the reactive oxygen species–dependent p38MAPK activation in HepG2 cancer cells.
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Affiliation(s)
- Perumal Sathish Kumar
- Centre for Research and Development of Siddha-Ayurveda Medicines (CRDSAM), Department of Plant Science, Bharathidasan University, Tiruchirappalli, India
| | - Madepalli Byrappa Gowdu Viswanathan
- Centre for Research and Development of Siddha-Ayurveda Medicines (CRDSAM), Department of Plant Science, Bharathidasan University, Tiruchirappalli, India
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Zhang J, Storey KB. Insect cold hardiness: the role of mitogen-activated protein kinase and Akt signalling in freeze avoiding larvae of the goldenrod gall moth, Epiblema scudderiana. INSECT MOLECULAR BIOLOGY 2017; 26:181-189. [PMID: 27880024 DOI: 10.1111/imb.12283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Larvae of the goldenrod gall moth, Epiblema scudderiana, use the freeze avoidance strategy of cold hardiness to survive the winter. Here we report that protein kinase-dependent signal transduction featuring mitogen-activated protein kinase (MAPK) signalling cascades (extracellular signal regulated kinase, c-jun N-terminal kinase and p38 MAPK pathways) and the Akt (also known as protein kinase B, or PKB) pathway could be integral parts of the development of cold hardiness by E. scudderiana. We used Luminex technology to assess the protein levels and phosphorylation status of key components and downstream targets of those pathways in larvae in response to low temperature acclimation. The data showed that MAPK pathways (both total protein and phosphorylated MAPK targets) were inhibited after 5°C acclimation, but not -15°C exposure, as compared with the 15°C control group. However, total heat shock protein 27 (HSP27) levels increased dramatically by ∼12-fold in the -15°C acclimated insects. Elevated HSP27 may facilitate anti-apoptotic mechanisms in an Akt-dependent fashion. By contrast, both 5 and -15°C acclimation produced signs of Akt pathway activation. In particular, the inhibitor phosphorylated Glycogen Synthase Kinase 3a (p-GSK3) levels remained high in cold-exposed larvae. Additionally, activation of the Akt pathway might also facilitate inhibition of apoptosis independently of GSK3. Overall, the current study indicates that both MAPK and Akt signal transduction may play essential roles in freeze avoidance by E. scudderiana.
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Affiliation(s)
- J Zhang
- Institute of Biochemistry and Department of Biology, Carleton University, Ottawa, Ontario, Canada
| | - K B Storey
- Institute of Biochemistry and Department of Biology, Carleton University, Ottawa, Ontario, Canada
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142
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Qu F, Xiang Z, Li J, Xiao S, Mao F, Qin Y, Zhou Y, Ma H, Yu Z. A molluscan extracellular signal-regulated kinase is involved in host response to immune challenges in vivo and in vitro. FISH & SHELLFISH IMMUNOLOGY 2017; 62:311-319. [PMID: 28159693 DOI: 10.1016/j.fsi.2017.01.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Revised: 01/23/2017] [Accepted: 01/28/2017] [Indexed: 06/06/2023]
Abstract
Extracellular signal-regulated kinases (ERKs) are a group of highly conserved serine/threonine-specific protein kinases that function as important signaling intermediates in mitogen-activated protein kinase (MAPK) pathways, which are involved in a wide variety of cellular activities, including proliferation, inflammation and cytokine production. However, little is known about the roles of this kinase in mollusk immunity. In this study, we identified a molluscan ERK homolog (ChERK) in the Hong Kong oyster (Crassostrea hongkongensis) and investigated its biological functions. The open reading frame (ORF) of ChERK encoded a polypeptide of 365 amino acids, with a predicted molecular weight of 41.96 kDa and pI of 6.43. The predicted ChERK protein contained typical characteristic motifs of the ERK family, including a dual threonine-glutamate-tyrosine (TEY) phosphorylation motif and an ATRW substrate binding site. Phylogenetic analysis revealed that ChERK belonged to the mollusk cluster and shared a close evolutionary relationship with ERK from Crassostrea gigas. In addition, quantitative real-time PCR analysis revealed that ChERK expression was detected in all of the examined tissues and stages of embryonic development; its transcript level was significantly induced upon challenge with bacterial pathogens (Vibrio alginolyticus and Staphylococcus haemolyticus) in vivo and PAMPs (lipopolysaccharide and peptidoglycan) in vitro. Moreover, ChERK was mainly located in the cytoplasm of HEK293T cells. Taken together, these findings may provide novel insights into the functions of molluscan ERKs, especially their roles in response to immune challenge in oyster.
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Affiliation(s)
- Fufa Qu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China; Department of Biological and Environmental Engineering, Changsha University, Changsha 410022, China
| | - Zhiming Xiang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China.
| | - Jun Li
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China
| | - Shu Xiao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China
| | - Fan Mao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China
| | - Yanping Qin
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China
| | - Yingli Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China
| | - Haitao Ma
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China
| | - Ziniu Yu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, Guangzhou 510275, China.
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143
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Yan L, Su J, Wang Z, Yan X, Yu R, Ma P, Li Y, Du J. Transcriptomic analysis of Crassostrea sikamea × Crassostrea angulata hybrids in response to low salinity stress. PLoS One 2017; 12:e0171483. [PMID: 28182701 PMCID: PMC5300195 DOI: 10.1371/journal.pone.0171483] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 01/21/2017] [Indexed: 11/17/2022] Open
Abstract
Hybrid oysters often show heterosis in growth rate, weight, survival and adaptability to extremes of salinity. Oysters have also been used as model organisms to study the evolution of host-defense system. To gain comprehensive knowledge about various physiological processes in hybrid oysters under low salinity stress, we performed transcriptomic analysis of gill tissue of Crassostrea sikamea ♀ × Crassostrea angulata♂ hybrid using the deep-sequencing platform Illumina HiSeq. We exploited the high-throughput technique to delineate differentially expressed genes (DEGs) in oysters maintained in hypotonic conditions. A total of 199,391 high quality unigenes, with average length of 644 bp, were generated. Of these 35 and 31 genes showed up- and down-regulation, respectively. Functional categorization and pathway analysis of these DEGs revealed enrichment for immune mechanism, apoptosis, energy metabolism and osmoregulation under low salinity stress. The expression patterns of 41 DEGs in hybrids and their parental species were further analyzed by quantitative real-time PCR (qRT-PCR). This study will serve as a platform for subsequent gene expression analysis regarding environmental stress. Our findings will also provide valuable information about gene expression to better understand the immune mechanism, apoptosis, energy metabolism and osmoregulation in hybrid oysters under low salinity stress.
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Affiliation(s)
- Lulu Yan
- Fisheries College, Ocean University of China, Qingdao, Shandong, China
| | - Jiaqi Su
- The Key Lab of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, Guangdong, China
| | - Zhaoping Wang
- Fisheries College, Ocean University of China, Qingdao, Shandong, China
| | - Xiwu Yan
- Engineering Research Center of Shellfish Culture and Breeding of Liaoning Province, College of Fisheries and Life Science, Dalian Ocean University, Dalian, Liaoning, China
| | - Ruihai Yu
- Fisheries College, Ocean University of China, Qingdao, Shandong, China
| | - Peizhen Ma
- Fisheries College, Ocean University of China, Qingdao, Shandong, China
| | - Yangchun Li
- Fisheries College, Ocean University of China, Qingdao, Shandong, China
| | - Junpeng Du
- Fisheries College, Ocean University of China, Qingdao, Shandong, China
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144
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Kalikstad B, Kultima HG, Andersstuen TK, Klungland A, Isaksson A. Gene expression profiles in preterm infants on continuous long‑term oxygen therapy suggest reduced oxidative stress‑dependent signaling during hypoxia. Mol Med Rep 2017; 15:1513-1526. [PMID: 28259955 PMCID: PMC5364962 DOI: 10.3892/mmr.2017.6185] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 12/01/2016] [Indexed: 01/24/2023] Open
Abstract
Preterm infants are susceptible to neonatal inflammatory/infective diseases requiring drug therapy. The present study hypothesized that mRNA expression in the blood may be modulated by signaling pathways during treatment. The current study aimed to explore changes in global gene expression in the blood from preterm infants with the objective of identifying patterns or pathways of potential relevance to drug therapy. The infants involved were selected based on maternal criteria indicating increased risk for therapeutic intervention. Global mRNA expression was measured in 107 longitudinal whole blood samples using Affymetrix Human-Genome-U133 Plus 2.0-arrays; samples were obtained from 20 preterm infants. Unsupervised clustering revealed a distinct homogeneous gene expression pattern in 13 samples derived from seven infants undergoing continuous oxygen therapy. At these sampling times, all but one of the seven infants exhibited severe drops in peripheral capillary saturation levels below 60%. The infants were reoxygenated with 100% inspired oxygen concentration. The other samples (n=94) represented the infants from the cohort at time points when they did not undergo continuous oxygen therapy. Comparing these two sets of samples identified a distinct gene expression pattern of 5,986 significantly differentially expressed genes, of which 5,167 genes exhibited reduced expression levels during transient hypoxia. This expression pattern was reversed when the infants became stable, i.e., when they were not continuously oxygenated and had no events of hypoxia. To identify signaling pathways involved in gene regulation, the Database for Annotation, Visualization and Integrated Discovery online tool was used. Mitogen-activated protein kinases, which are normally induced by oxidative stress, exhibited reduced gene expression during hypoxia. In addition, nuclear factor erythroid 2-related factor 2-antioxidant response element target genes involved in oxidative stress protection were also expressed at lower levels, suggesting reduced transcription of this pathway. The findings of the present study suggest that oxidative stress-dependent signaling is reduced during hypoxia. Understanding the molecular response in preterm infants during continuous oxygenation may aid in refining therapeutic strategies for oxygen therapy.
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Affiliation(s)
- Betty Kalikstad
- University of Oslo, Institute of Clinical Medicine, Women and Children's Clinic, Rikshospitalet, 0372 Oslo, Norway
| | - Hanna Göransson Kultima
- Department of Medical Sciences, Science for Life Laboratory, Uppsala University, 751 23 Uppsala, Sweden
| | | | - Arne Klungland
- Department of Molecular Biology, Institute of Medical Microbiology, Oslo University Hospital, Rikshospitalet, 0372 Oslo, Norway
| | - Anders Isaksson
- Department of Medical Sciences, Science for Life Laboratory, Uppsala University, 751 23 Uppsala, Sweden
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145
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Effect of four different in vitro incubation temperatures on functional dynamics, process of capacitation and apoptosis in goat spermatozoa. Small Rumin Res 2017. [DOI: 10.1016/j.smallrumres.2016.12.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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146
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Protective effect of ginsenoside Rh3 against anticancer drug-induced apoptosis in LLC-PK1 kidney cells. J Ginseng Res 2017; 41:227-231. [PMID: 28413329 PMCID: PMC5386128 DOI: 10.1016/j.jgr.2017.01.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 01/17/2017] [Accepted: 01/18/2017] [Indexed: 01/28/2023] Open
Abstract
Background Ginsenosides are active components of Panax ginseng that exert various health benefits including kidney protection effect. The medicinal activity of ginsenosides can be enhanced by modulating their stereospecificity by heat processing. Ginsenosides Rk2 and Rh3 represent positional isomers of the double bond at C-20(21) or C-20(22). Methods The present study investigated the kidney-protective effects of ginsenosides Rk2 and Rh3 against cisplatin, a platinum based anticancer drug, induced apoptotic damage in renal proximal LLC-PK1 cells. Results As a result, ginsenoside Rh3 shows a stronger protective effect than that shown by Rk2. Cisplatin-induced elevated protein levels of phosphorylated c-Jun N-terminal kinase (JNK), extracellular signal-regulated kinase (ERK), p38, and cleaved caspase-3 decreased after cotreatment with ginsenoside Rh3. The increase in the percentage of apoptotic LLC-PK1 cells induced by cisplatin treatment also significantly reduced after cotreatment with ginsenoside Rh3. Conclusion These results demonstrate that inhibition of the JNK and ERK mitogen-activated protein kinase signaling cascade plays a critical role in mediating the renoprotective effect of ginsenoside Rh3.
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147
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Tat-DJ-1 enhances cell survival by inhibition of oxidative stress, NF-κB and MAPK activation in HepG2 cells. Biotechnol Lett 2017; 39:511-521. [DOI: 10.1007/s10529-017-2286-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/04/2017] [Indexed: 12/29/2022]
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148
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Korytář T, Nipkow M, Altmann S, Goldammer T, Köllner B, Rebl A. Adverse Husbandry of Maraena Whitefish Directs the Immune System to Increase Mobilization of Myeloid Cells and Proinflammatory Responses. Front Immunol 2016; 7:631. [PMID: 28066440 PMCID: PMC5179527 DOI: 10.3389/fimmu.2016.00631] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 12/08/2016] [Indexed: 11/21/2022] Open
Abstract
Adverse life circumstances evoke a common “conserved transcriptional response to adversity” (CTRA) in mammalian leukocytes. To investigate whether this pattern is preserved in lower vertebrates, maraena whitefish (Coregonus maraena) were exposed for 9 days to different stocking densities: ~10 kg/m3 (low density), ~33 kg/m3 (moderate), ~60 kg/m3 (elevated), and ~100 kg/m3 (high). Transcriptome profiling in the liver and kidney of individuals from each group suggested that crowding conditions activate stress-related signaling and effector pathways. Remarkably, about one-quarter of the genes differentially expressed under crowding conditions were involved in the activation of immune pathways such as acute-phase response and interleukin/TNF signaling attended by the simultaneous reduction of antiviral potency. Network analysis confirmed the complex interdigitation of immune- and stress-relevant pathways with interleukin-1 playing a central role. Antibody-based techniques revealed remarkable changes in the blood composition of whitefish and demonstrated the correlation between increasing stocking densities and elevated number of myeloid cells together with the increased phagocytic activity of peripheral blood leukocytes. In line with current studies in mammals, we conclude that crowding stress triggers in whitefish hallmarks of a CTRA, indicating that the stress-induced molecular mechanisms regulating the immune responses not only are conserved within mammals but were established earlier in evolution.
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Affiliation(s)
- Tomáš Korytář
- Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany; Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Mareen Nipkow
- Fish Genetics Unit, Institute for Genome Biology, Leibniz Institute for Farm Animal Biology (FBN) , Dummerstorf , Germany
| | - Simone Altmann
- Fish Genetics Unit, Institute for Genome Biology, Leibniz Institute for Farm Animal Biology (FBN) , Dummerstorf , Germany
| | - Tom Goldammer
- Fish Genetics Unit, Institute for Genome Biology, Leibniz Institute for Farm Animal Biology (FBN) , Dummerstorf , Germany
| | - Bernd Köllner
- Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health , Greifswald-Insel Riems , Germany
| | - Alexander Rebl
- Fish Genetics Unit, Institute for Genome Biology, Leibniz Institute for Farm Animal Biology (FBN) , Dummerstorf , Germany
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149
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Ryu HW, Lee SU, Lee S, Song HH, Son TH, Kim YU, Yuk HJ, Ro H, Lee CK, Hong ST, Oh SR. 3-Methoxy-catalposide inhibits inflammatory effects in lipopolysaccharide-stimulated RAW264.7 macrophages. Cytokine 2016; 91:57-64. [PMID: 28011397 DOI: 10.1016/j.cyto.2016.12.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 12/05/2016] [Accepted: 12/09/2016] [Indexed: 01/18/2023]
Abstract
Pseudolysimachion rotundum var. subintegrum is utilized as a traditional herbal remedy to treat cough, bronchitis, and asthma in Korea, Russia, China, and Europe. Here, we show that 3-methoxy-catalposide, a novel iridoide glycoside isolated from P. rotundum var. subintegrum has the anti-inflammatory activity in lipopolysaccharide (LPS)-stimulated macrophages. The chemical structure of 3-methoxy-catalposide was determined by NMR, optical rotation and HRESIMS. In in vitro experiment, RAW264.7 cells were treated with 3-methoxy-catalposide for 2h before exposure to LPS for different times. Inflammatory gene and protein expressions were assayed using RT-PCR and ELISA. Activities of signal proteins were examined using western analysis. Our results demonstrated that 3-methoxy-catalposide significantly inhibits the expression of cyclooxygenase (COX)-2 and inducible nitric oxide synthase (iNOS) in RAW264.7 cells stimulated by LPS, thereby suppressing the release of prostaglandin E2 (PGE2) and nitric oxide (NO). Moreover, 3-methoxy-catalposide markedly reduced the LPS-induced expression of pro-inflammatory genes, such as interleukin (IL)-6, IL-1β, and TNF-α. Further, 3-methoxy-catalposide inhibited both LPS-induced activation of three MAP kinases (ERK 1/2, JNK, and p38) and the nuclear translocation of NF-κB and AP-1. These results support that 3-methoxy-catalposide may be a promising candidate for inflammation treatment.
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Affiliation(s)
- Hyung Won Ryu
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang, Cheongju, Chungbuk 28116, Republic of Korea
| | - Su Ui Lee
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang, Cheongju, Chungbuk 28116, Republic of Korea
| | - Seoghyun Lee
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang, Cheongju, Chungbuk 28116, Republic of Korea; College of Bioscience and Biotechnology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Hyuk-Hwan Song
- R&D Team, Agency for Korea National Food Cluster (AnFC), 460 Iksan-daero, Iksan, Jeonbuk 507-749, Republic of Korea
| | - Tae Hyun Son
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang, Cheongju, Chungbuk 28116, Republic of Korea; College of Pharmacy, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Yeah-Un Kim
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang, Cheongju, Chungbuk 28116, Republic of Korea
| | - Heung Joo Yuk
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang, Cheongju, Chungbuk 28116, Republic of Korea
| | - Hyunju Ro
- College of Bioscience and Biotechnology, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Chong-Kil Lee
- College of Pharmacy, Chungbuk National University, Cheongju 28644, Republic of Korea
| | - Sung-Tae Hong
- Department of Biological Sciences, Korea Advanced Institute of Science & Technology, 291 Daehak-ro, Yuseong, Daejeon 34141, Republic of Korea.
| | - Sei-Ryang Oh
- Natural Medicine Research Center, Korea Research Institute of Bioscience and Biotechnology, 30 Yeongudanji-ro, Ochang, Cheongju, Chungbuk 28116, Republic of Korea.
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150
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Identification of a multifunctional docking site on the catalytic unit of phosphodiesterase-4 (PDE4) that is utilised by multiple interaction partners. Biochem J 2016; 474:597-609. [PMID: 27993970 PMCID: PMC5290487 DOI: 10.1042/bcj20160849] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 12/15/2016] [Accepted: 12/19/2016] [Indexed: 12/26/2022]
Abstract
Cyclic AMP (cAMP)-specific phosphodiesterase-4 (PDE4) enzymes underpin compartmentalised cAMP signalling by localising to distinct signalling complexes. PDE4 long isoforms can be phosphorylated by mitogen-activated protein kinase-activated protein kinase 2 (MK2), which attenuates activation of such enzymes through their phosphorylation by protein kinase A. Here we show that MK2 interacts directly with PDE4 long isoforms and define the sites of interaction. One is a unique site that locates within the regulatory upstream conserved region 1 (UCR1) domain and contains a core Phe141, Leu142 and Tyr143 (FLY) cluster (PDE4A5 numbering). Located with the second site is a critical core Phe693, Glu694, Phe695 (FQF) motif that is also employed in the sequestering of PDE4 long forms by an array of other signalling proteins, including the signalling scaffold β-arrestin, the tyrosyl kinase Lyn, the SUMOylation E2 ligase UBC9, the dynein regulator Lis1 (PAFAH1B1) and the protein kinase Erk. We propose that the FQF motif lies at the heart of a multifunctional docking (MFD) site located within the PDE4 catalytic unit. It is clear from our data that, as well as aiding fidelity of interaction, the MFD site confers exclusivity of binding between PDE4 and a single specific partner protein from the cohort of signalling proteins whose interaction with PDE4 involves the FQF motif.
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