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Liu MZ, Zhou DC, Liu Q, Xie FL, Xiang DX, Tang GY, Luo SL. Osteogenesis activity of isocoumarin a through the activation of the PI3K-Akt/ Erk cascade-activated BMP/RUNX2 signaling pathway. Eur J Pharmacol 2019; 858:172480. [PMID: 31228453 DOI: 10.1016/j.ejphar.2019.172480] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/18/2019] [Accepted: 06/18/2019] [Indexed: 11/18/2022]
Abstract
Bone formation refers to a series of complex events related to the activities of osteoblasts. In this study, we evaluated the osteogenesis activity of a natural compound named isocoumarin A that was isolated from the rhizomes of Polygonum amplexicaule on the non-transformed preosteoblastic cell line MC3T3-E1 for an in vitro study, and the results revealed that it increased the proliferation and promoted the mineralization of the extracellular matrix of MC3T3-E1 cells after treatment for 3 d in a dose-dependent manner. The cell metabolic activity peaked at 169% at 10 μM, and the activity of alkaline phosphatase (ALP) tripled to 15.94 U/mg compared with the control group. The protein levels of morphogenetic protein 2 (BMP-2), runt-related transcription factor 2 (RUNX2), ALP, and the mRNA levels of ALP, type I collagen (COL-1), and osteocalcin (OCN) were also upregulated after isocoumarin A administration. The mechanism investigation revealed that these effects were associated with the activation of the p-Akt/p-Erk1/2-activated BMP/RUNX2 signaling pathway. Subsequently, the in vivo investigation on the zebrafish embryos model demonstrated that isocoumarin A (0.30 mM) increased the number of vertebrae (5.38 ± 2.07 pcs) and the vertebral area (433.25 ± 111.77 μm2) in the development process of zebrafish embryos after a 7-day postfertilization (dpf) culture compared with the control group (2.50 ± 1.16 pcs and 209.75 ± 86.40 μm2). Together, these results indicated that isocoumarin A could be viewed as a promising candidate in early drug discovery and development to promote the healing of fractures and postmenopausal osteoporosis.
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Affiliation(s)
- Min-Zhen Liu
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China; Institute of Clinical Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China
| | - Dong-Chu Zhou
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China; Institute of Clinical Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China
| | - Qiang Liu
- Department of Pharmacy, Yiyang Central Hospital, Yiyang, 41300, PR China
| | - Fu-Li Xie
- School of Medical Science, Hunan Provincial Key Laboratory of Dong Medicine, Hunan University of Medicine, Huaihua, 418000, PR China
| | - Da-Xiong Xiang
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China; Institute of Clinical Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China
| | - Gen-Yun Tang
- School of Medical Science, Hunan Provincial Key Laboratory of Dong Medicine, Hunan University of Medicine, Huaihua, 418000, PR China
| | - Shi-Lin Luo
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China; Institute of Clinical Pharmacy, The Second Xiangya Hospital, Central South University, Changsha, 410011, PR China.
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Gensicke NM, Cavanaugh NB, Andersen ND, Huang T, Qian L, Dyle MC, Turek JW. Accelerated Marfan syndrome model recapitulates established signaling pathways. J Thorac Cardiovasc Surg 2019; 159:1719-1726. [PMID: 31272746 DOI: 10.1016/j.jtcvs.2019.05.043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 04/17/2019] [Accepted: 05/11/2019] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Marfan syndrome (MFS) represents a genetic disorder with a range of clinical features, including proximal aortic aneurysms. Extensive research has revealed an abundance of transforming growth factor beta from a mutation in fibrillin-1 to be the key biochemical mechanism of aneurysm formation. Many important signaling pathways downstream of transforming growth factor beta have been further characterized. Our laboratory has previously demonstrated a unique murine model of MFS resulting in the accelerated formation of ascending aortic aneurysms and dilated cardiomyopathies. This study aims to characterize the relevance of this model to known signaling mechanisms in MFS. METHODS Fibrillin 1C1039G/+ heterozygous mice (ie, MFS), with a mutation in fibrillin-1, were supplemented with 4.5 mg/kg/d angiotensin II to accelerate aneurysm formation. Four mouse groups were analyzed: wild type with or without angiotensin II and MFS with or without angiotensin II. Aortic tissue from these samples were subjected to western blotting and phosphoimaging to query various signaling pathways. RESULTS Mice with MFS displayed downstream regulation in both the canonical (Smad2) and noncononical (extracellular signal-regulated kinases and P38) pathways characteristic of MFS. However, these downstream signals were exaggerated in the MFS mice supplemented with angiotensin II (accelerated model), matching the observed phenotypic severity of this model. CONCLUSIONS The murine MFS model depicted here accelerates ascending aortic aneurysm formation and cardiomyopathies via well-characterized MFS signaling cascades. The mechanistic relevance of the accelerated murine MFS model suggests that it could be an important tool in future studies hoping to characterize MFS signaling in an expedited experimental design.
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Affiliation(s)
| | | | - Nicholas D Andersen
- Duke Congenital Heart Surgery Research & Training Laboratory, Durham, NC; Duke Pediatric & Congenital Heart Center of Duke Children's Hospital, Durham, NC; Division of Thoracic and Cardiovascular Surgery, Duke University Medical Center, Durham, NC
| | - Tai Huang
- Duke Congenital Heart Surgery Research & Training Laboratory, Durham, NC
| | - Lan Qian
- University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Michael C Dyle
- University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Joseph W Turek
- Duke Congenital Heart Surgery Research & Training Laboratory, Durham, NC; Duke Pediatric & Congenital Heart Center of Duke Children's Hospital, Durham, NC; Division of Thoracic and Cardiovascular Surgery, Duke University Medical Center, Durham, NC.
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Ziyad S, Riordan JD, Cavanaugh AM, Su T, Hernandez GE, Hilfenhaus G, Morselli M, Huynh K, Wang K, Chen JN, Dupuy AJ, Iruela-Arispe ML. A Forward Genetic Screen Targeting the Endothelium Reveals a Regulatory Role for the Lipid Kinase Pi4ka in Myelo- and Erythropoiesis. Cell Rep 2019; 22:1211-1224. [PMID: 29386109 PMCID: PMC5828030 DOI: 10.1016/j.celrep.2018.01.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 11/05/2017] [Accepted: 01/05/2018] [Indexed: 11/19/2022] Open
Abstract
Given its role as the source of definitive hematopoietic cells, we sought to determine whether mutations initiated in the hemogenic endothelium would yield hematopoietic abnormalities or malignancies. Here, we find that endothelium-specific transposon mutagenesis in mice promotes hematopoietic pathologies that are both myeloid and lymphoid in nature. Frequently mutated genes included previously recognized cancer drivers and additional candidates, such as Pi4ka, a lipid kinase whose mutation was found to promote myeloid and erythroid dysfunction. Subsequent validation experiments showed that targeted inactivation of the Pi4ka catalytic domain or reduction in mRNA expression inhibited myeloid and erythroid cell differentiation in vitro and promoted anemia in vivo through a mechanism involving deregulation of AKT, MAPK, SRC, and JAK-STAT signaling. Finally, we provide evidence linking PI4KAP2, previously considered a pseudogene, to human myeloid and erythroid leukemia.
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Affiliation(s)
- Safiyyah Ziyad
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jesse D Riordan
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - Ann M Cavanaugh
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Trent Su
- Institute for Quantitative and Computational Biology and Department of Biological Chemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Gloria E Hernandez
- Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Georg Hilfenhaus
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Marco Morselli
- Institute for Quantitative and Computational Biology and Department of Biological Chemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA; Institute of Genomics and Proteomics, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kristine Huynh
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Kevin Wang
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Jau-Nian Chen
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Adam J Dupuy
- Department of Anatomy and Cell Biology, University of Iowa, Iowa City, IA 52242, USA
| | - M Luisa Iruela-Arispe
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, Los Angeles, CA 90095, USA; Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA; Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA 90095, USA.
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Hsieh SC, Lai CS, Chang CH, Yen JH, Huang SW, Feng CH, Chen YW, Li ZY. Nitric oxide: Is it the culprit for the continued expansion of keloids? Eur J Pharmacol 2019; 854:282-8. [PMID: 31034822 DOI: 10.1016/j.ejphar.2019.04.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 04/19/2019] [Accepted: 04/25/2019] [Indexed: 11/22/2022]
Abstract
Keloids are characterized by excessive proliferation of fibroblasts and invasion of surrounding healthy skin. High levels of Nitric Oxide (NO) are thought to be the crucial factor within the micro-environment in promoting keloid formation. However, the effects and mechanisms of NO on the proliferation of Keloid Fibroblasts (KDFs) remain unclear. In this study, we investigated the effect of NO on KDFs proliferation by Sodium Nitroprusside (SNP), an NO donor. Our results show that SNP significantly enhanced KDFs proliferation. Moreover, with prolonged treatment with SNP after cell confluence, the growth of KDFs escape contact inhibition and experience significant pile up growth. Furthermore, PTIO, an NO scavenger, attenuated SNP-enhanced cell proliferation effectively. The mechanism involved in SNP-induced KDFs proliferation was soluble Guanylyl Cyclase (sGC) and cGMP independent. ODQ, a specific sGC inhibitor, failed to suppress SNP-enhanced KDFs proliferation. 8-Bromo-c GMP, a cell-permeable cGMP analogue, could not stimulate KDFs proliferation. Erk and Akt provide important signaling for cell growth. U0126 and LY294002, inhibitors of Erk and Akt respectively, block SNP-enhanced KDFs proliferation effectively. As expected, a Western blot showed that SNP up-regulated the phosphorylation levels of Erk and Akt. Moreover, it decreased the expression of p27, a cell cycle inhibitor. Our results reveal that SNP induced KDFs proliferation and loss contact inhibition led to pile up growth via activation of the Erk and Akt pathways, as well as a decreased expression of p27. Thus, we speculate that the pathological feature of continuous expansion in keloids is caused by NO-induced KDFs sustained growth.
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Nam HK, Vesela I, Siismets E, Hatch NE. Tissue nonspecific alkaline phosphatase promotes calvarial progenitor cell cycle progression and cytokinesis via Erk1,2. Bone 2019; 120:125-136. [PMID: 30342227 PMCID: PMC6360114 DOI: 10.1016/j.bone.2018.10.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 10/09/2018] [Accepted: 10/14/2018] [Indexed: 01/09/2023]
Abstract
Bone growth is dependent upon the presence of self-renewing progenitor cell populations. While the contribution of Tissue Nonspecific Alkaline Phosphatase (TNAP) enzyme activity in promoting bone mineralization when expressed in differentiated bone forming cells is well understood, little is known regarding the role of TNAP in bone progenitor cells. We previously found diminished proliferation in the calvarial MC3T3E1 cell line upon suppression of TNAP by shRNA, and in calvarial cells and tissues of TNAP-/- mice. These findings indicate that TNAP promotes cell proliferation. Here we investigate how TNAP mediates this effect. Results show that TNAP is essential for calvarial progenitor cell cycle progression and cytokinesis, and that these effects are mediated by inorganic phosphate and Erk1/2. Levels of active Erk1/2 are significantly diminished in TNAP deficient cranial cells and tissues even in the presence of inorganic phosphate. Moreover, in the absence of TNAP, FGFR2 expression levels are high and FGF2 rescues phospho-Erk1/2 levels and cell cycle abnormalities to a significantly greater extent than inorganic phosphate. Based upon the data we propose a model in which TNAP stimulates Erk1/2 activity via both phosphate dependent and independent mechanisms to promote cell cycle progression and cytokinesis in calvarial bone progenitor cells. Concomitantly, TNAP feeds back to inhibit FGFR2 expression. These results identify a novel mechanism by which TNAP promotes calvarial progenitor cell renewal and indicate that converging pathways exist downstream of FGF signaling and TNAP activity to control craniofacial skeletal development.
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Affiliation(s)
- Hwa Kyung Nam
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, 1011 N University Avenue, University of Michigan, Ann Arbor, MI 48109-1078, USA
| | - Iva Vesela
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, 1011 N University Avenue, University of Michigan, Ann Arbor, MI 48109-1078, USA
| | - Erica Siismets
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, 1011 N University Avenue, University of Michigan, Ann Arbor, MI 48109-1078, USA
| | - Nan E Hatch
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, 1011 N University Avenue, University of Michigan, Ann Arbor, MI 48109-1078, USA.
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Sinha N, Meher BR, Naik PP, Panda PK, Mukhapadhyay S, Maiti TK, Bhutia SK. p73 induction by Abrus agglutinin facilitates Snail ubiquitination to inhibit epithelial to mesenchymal transition in oral cancer. Phytomedicine 2019; 55:179-190. [PMID: 30668428 DOI: 10.1016/j.phymed.2018.08.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 05/21/2018] [Accepted: 08/05/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Epithelial-to-mesenchymal transition (EMT), a key step in oral cancer progression, is associated with invasion, metastasis, and therapy resistance, thus targeting the EMT represents a critical therapeutic strategy for the treatment of oral cancer metastasis. Our previous study showed that Abrus agglutinin (AGG), a plant lectin, induces both intrinsic and extrinsic apoptosis to activate the tumor inhibitory mechanism. OBJECTIVE This study aimed to investigate the role of AGG in modulating invasiveness and stemness through EMT inhibition for the development of antineoplastic agents against oral cancer. METHODS The EMT- and stemness-related proteins were studied in oral cancer cells using Western blot analysis and fluorescence microscopy. The potential mechanisms of Snail downregulation through p73 activation in FaDu cells were evaluated using Western blot analysis, immunoprecipitation, confocal microscopy, and molecular docking analysis. Immunohistochemical staining of the tumor samples of AGG-treated FaDu-xenografted nude mice was performed. RESULTS At the molecular level, AGG-induced p73 suppressed Snail expression, leading to EMT inhibition in FaDu cells. Notably, AGG promoted the translocation of Snail from the nucleus to the cytoplasm in FaDu cells and triggered its degradation through ubiquitination. In this setting, AGG inhibited the interaction between Snail and p73 in FaDu cells, resulting in p73 activation and EMT inhibition. Moreover, in epidermal growth factor (EGF)-stimulated FaDu cells, AGG abolished the upregulation of extracellular signal-regulated kinase (ERK)1/2 that plays a pivotal role in the upregulation of Snail to regulate the EMT phenotypes. In immunohistochemistry analysis, FaDu xenografts from AGG-treated mice showed decreased expression of Snail, SOX2, and vimentin and increased expression of p73 and E-cadherin compared with the control group, confirming EMT inhibition as part of its anticancer efficacy against oral cancer. CONCLUSION In summary, AGG stimulates p73 in restricting EGF-induced EMT, invasiveness, and stemness by inhibiting the ERK/Snail pathway to facilitate the development of alternative therapeutics for oral cancer.
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Affiliation(s)
- Niharika Sinha
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India
| | - Biswa Ranjan Meher
- Centre for Life Science, Central University of Jharkhand, Brambe, Ranchi 835205, Jharkhand, India
| | - Prajna Paramita Naik
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India
| | - Prashanta Kumar Panda
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India
| | - Subhadip Mukhapadhyay
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India
| | - Tapas K Maiti
- Department of Biotechnology, Indian Institute of Technology, Kharagpur, Kharagpur 721302, India
| | - Sujit K Bhutia
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India.
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Vasjari L, Bresan S, Biskup C, Pai G, Rubio I. Ras signals principally via Erk in G1 but cooperates with PI3K/Akt for Cyclin D induction and S-phase entry. Cell Cycle 2019; 18:204-225. [PMID: 30560710 DOI: 10.1080/15384101.2018.1560205] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Numerous studies exploring oncogenic Ras or manipulating physiological Ras signalling have established an irrefutable role for Ras as driver of cell cycle progression. Despite this wealth of information the precise signalling timeline and effectors engaged by Ras, particularly during G1, remain obscure as approaches for Ras inhibition are slow-acting and ill-suited for charting discrete Ras signalling episodes along the cell cycle. We have developed an approach based on the inducible recruitment of a Ras-GAP that enforces endogenous Ras inhibition within minutes. Applying this strategy to inhibit Ras stepwise in synchronous cell populations revealed that Ras signaling was required well into G1 for Cyclin D induction, pocket protein phosphorylation and S-phase entry, irrespective of whether cells emerged from quiescence or G2/M. Unexpectedly, Erk, and not PI3K/Akt or Ral was activated by Ras at mid-G1, albeit PI3K/Akt signalling was a necessary companion of Ras/Erk for sustaining cyclin-D levels and G1/S transition. Our findings chart mitogenic signaling by endogenous Ras during G1 and identify limited effector engagement restricted to Raf/MEK/Erk as a cogent distinction from oncogenic Ras signalling.
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Affiliation(s)
- Ledia Vasjari
- a Institute of Molecular Cell Biology, Center for Molecular Biomedicine , Jena University Hospital , Jena , Germany
| | - Stephanie Bresan
- a Institute of Molecular Cell Biology, Center for Molecular Biomedicine , Jena University Hospital , Jena , Germany
| | - Christoph Biskup
- b Biomolecular Photonics Group , Jena University Hospital , Jena , Germany
| | - Govind Pai
- a Institute of Molecular Cell Biology, Center for Molecular Biomedicine , Jena University Hospital , Jena , Germany
| | - Ignacio Rubio
- a Institute of Molecular Cell Biology, Center for Molecular Biomedicine , Jena University Hospital , Jena , Germany
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Cruz-Nova P, Schnoor M, Correa-Basurto J, Bello M, Briseño-Diaz P, Rojo-Domínguez A, Ortiz-Mendoza CM, Guerrero-Aguirre J, García-Vázquez FJ, Hernández-Rivas R, Thompson-Bonilla MDR, Vargas M. The small organic molecule C19 binds and strengthens the KRAS4b-PDEδ complex and inhibits growth of colorectal cancer cells in vitro and in vivo. BMC Cancer 2018; 18:1056. [PMID: 30382908 PMCID: PMC6211466 DOI: 10.1186/s12885-018-4968-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Accepted: 10/17/2018] [Indexed: 11/26/2022] Open
Abstract
BACKGROUND Colorectal cancer is the third most common cancer worldwide; and in 40% of all cases, KRAS4b-activating mutations occur. KRAS4b is transported by phosphodiesterase-6δ (PDEδ) to the plasma membrane, where it gets activated. PDEδ downregulation prevents redistribution and activation of KRAS4b. Thus, targeting the KRAS4b-PDEδ complex is a treatment strategy for colorectal cancer. METHODS Using docking and molecular dynamics simulations coupled to molecular mechanics, the generalized born model and solvent accessibility (MMGBSA) approach to explore protein-ligand stability, we found that the compound ((2S)-N-(2,5-diclorofenil)-2-[(3,4-dimetoxifenil)metilamino]-propanamida), termed C19, bound and stabilized the KRAS4b-PDEδ complex. We investigated whether C19 decreases the viability and proliferation of colorectal cancer cells, in addition to knowing the type of cell death that it causes and if C19 decreases the activation of KRAS4b and their effectors. RESULTS C19 showed high cytotoxicity in the colorectal cancer cell lines HCT116 and LoVo, with a stronger effect in KRAS-dependent LoVo cells. Importantly, C19 significantly decreased tumor size in a xenograft mouse model and showed lower side effects than 5-fluorouracil that is currently used as colorectal cancer treatment. CONCLUSIONS Mechanistically, the cytotoxic effect was due to increased apoptosis of tumor cells and decreased phosphorylation of Erk and Akt. Therefore, our results suggest that C19 may serve as a promising new treatment for colorectal cancer.
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Affiliation(s)
- Pedro Cruz-Nova
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. I.P.N, 2508, México City, Mexico
| | - Michael Schnoor
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. I.P.N, 2508, México City, Mexico
| | - José Correa-Basurto
- Laboratorio de Modelado Molecular y diseño de fármacos de la Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, Mexico
| | - Martiniano Bello
- Laboratorio de Modelado Molecular y diseño de fármacos de la Escuela Superior de Medicina, Instituto Politécnico Nacional, México City, Mexico
| | - Paola Briseño-Diaz
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. I.P.N, 2508, México City, Mexico
| | - Arturo Rojo-Domínguez
- Departamento de Ciencias Naturales, Universidad Autónoma Metropolitana Unidad Cuajimalpa, México City, Mexico
| | - Carlos M Ortiz-Mendoza
- Investigación Biomédica y Traslacional, Laboratorio de Medicina Genómica, Hospital 1° de Octubre, ISSSTE, México City, Mexico
| | - Jorge Guerrero-Aguirre
- Investigación Biomédica y Traslacional, Laboratorio de Medicina Genómica, Hospital 1° de Octubre, ISSSTE, México City, Mexico
| | | | - Rosaura Hernández-Rivas
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. I.P.N, 2508, México City, Mexico
| | | | - Miguel Vargas
- Departamento de Biomedicina Molecular, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional (CINVESTAV-IPN), Av. I.P.N, 2508, México City, Mexico.
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Ohtake Y, Sami A, Jiang X, Horiuchi M, Slattery K, Ma L, Smith GM, Selzer ME, Muramatsu SI, Li S. Promoting Axon Regeneration in Adult CNS by Targeting Liver Kinase B1. Mol Ther 2018; 27:102-117. [PMID: 30509565 DOI: 10.1016/j.ymthe.2018.10.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 10/24/2018] [Accepted: 10/26/2018] [Indexed: 12/21/2022] Open
Abstract
Liver kinase B1 (LKB1), a downstream effector of cyclic AMP (cAMP)/PKA and phosphatidylinositol 3-kinase (PI3K) pathways, is a determinant for migration and differentiation of many cells, but its role in CNS axon regeneration is unknown. Therefore, LKB1 was overexpressed in sensorimotor cortex of adult mice five days after mid-thoracic spinal cord injury, using an AAV2 vector. Regeneration of corticospinal axons was dramatically enhanced. Next, systemic injection of a mutant-AAV9 vector was used to upregulate LKB1 specifically in neurons. This promoted long-distance regeneration of injured corticospinal fibers into caudal spinal cord in adult mice and regrowth of descending serotonergic and tyrosine hydroxylase immunoreactive axons. Either intracortical or systemic viral delivery of LKB1 significantly improved recovery of locomotor functions in adult mice with spinal cord injury. Moreover, we demonstrated that LKB1 used AMPKα, NUAK1, and ERK as the downstream effectors in the cortex of adult mice. Thus, LKB1 may be a critical factor for enhancing the growth capacity of mature neurons and may be an important molecular target in the treatment of CNS injuries.
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Affiliation(s)
- Yosuke Ohtake
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Armin Sami
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Xinpei Jiang
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Makoto Horiuchi
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Kieran Slattery
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Lena Ma
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - George M Smith
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Neuroscience, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Michael E Selzer
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Neurology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA
| | - Shin-Ichi Muramatsu
- Division of Neurology, Jichi Medical University, Shimotsuke, Tochigi 329-0498, Japan
| | - Shuxin Li
- Shriners Hospitals Pediatric Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA; Department of Anatomy and Cell Biology, Lewis Katz School of Medicine, Temple University, Philadelphia, PA 19140, USA.
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Ishii D, Matsuzawa D, Matsuda S, Tomizawa-Shinohara H, Sutoh C, Shimizu E. Spontaneous recovery of fear differs among early - late adolescent and adult male mice. Int J Neurosci 2018; 129:1-9. [PMID: 30010457 DOI: 10.1080/00207454.2018.1501049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Adolescence is a vulnerable period for developing anxiety-related mental disorders such as post-traumatic stress disorder (PTSD), which requires a long-term course of therapy when a traumatic event has been experienced during childhood. However, the biological mechanism underlying these age-dependent characteristics remains unclear. In the present study, we used early adolescent, late adolescent and adult (4-, 8-, and 15-week old) male mice to examine age differences in fear memory, fear extinction, and spontaneous recovery of fear. We also measured the activation of extracellular signal-regulated kinase (ERK) 2 in the dorsal hippocampus (dHip) and the basolateral amygdala (BLA) following a spontaneous recovery test. Our major findings were as follows: (1) early adolescent and adult mice did not recover the fear response; only late adolescent mice recovered the fear response. (2) The ERK2 in the dHip was more activated after the spontaneous recovery test in late adolescent mice than in adult mice, and the ERK2 in the BLA was more activated after the spontaneous recovery test in adult mice than in late adolescent mice. These results suggest that there exists a unique period in which spontaneous recovery occurs and that these late adolescent behavioral signatures may be related to alteration in the ERK2 phosphorylation in the dHip and BLA.
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Affiliation(s)
- Daisuke Ishii
- a Center for Medical Sciences , Ibaraki Prefectural University of Health Sciences , Ibaraki , Japan.,b Department of Cognitive Behavioral Physiology , Chiba University Graduate School of Medicine , Chiba , Japan
| | - Daisuke Matsuzawa
- b Department of Cognitive Behavioral Physiology , Chiba University Graduate School of Medicine , Chiba , Japan.,c Research Center for Child Mental Development , Chiba University Graduate School of Medicine , Chiba , Japan
| | - Shingo Matsuda
- b Department of Cognitive Behavioral Physiology , Chiba University Graduate School of Medicine , Chiba , Japan.,d Department of Pharmacotherapeutics , Showa Pharmaceutical University , Tokyo , Japan.,e Department of Ultrastructural Research , National Institute of Neuroscience, National Center of Neurology and Psychiatry , Tokyo , Japan
| | - Haruna Tomizawa-Shinohara
- b Department of Cognitive Behavioral Physiology , Chiba University Graduate School of Medicine , Chiba , Japan
| | - Chihiro Sutoh
- b Department of Cognitive Behavioral Physiology , Chiba University Graduate School of Medicine , Chiba , Japan
| | - Eiji Shimizu
- b Department of Cognitive Behavioral Physiology , Chiba University Graduate School of Medicine , Chiba , Japan.,c Research Center for Child Mental Development , Chiba University Graduate School of Medicine , Chiba , Japan
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Kobayashi T, Kozlova A. Lin28a overexpression reveals the role of Erk signaling in articular cartilage development. Development 2018; 145:dev.162594. [PMID: 30042178 DOI: 10.1242/dev.162594] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 07/08/2018] [Indexed: 12/12/2022]
Abstract
Adult articular cartilage shows limited tissue turnover, and therefore development of the proper structure of articular cartilage is crucial for life-long joint function. However, the mechanism by which the articular cartilage structure is developmentally regulated is poorly understood. In this study, we show evidence that activation of extracellular signal-regulated kinases (Erk1/2) in articular chondrocyte progenitors during developmental stages control articular cartilage thickness. We found that overexpression of Lin28a, an RNA-binding protein that regulates organismal growth and metabolism, in articular chondrocyte progenitor cells upregulated Erk signaling and increased articular cartilage thickness. Overexpression of a constitutively active Kras mimicked Lin28a overexpression, and inhibition of Erk signaling during embryonic stages normalized the cartilage phenotype of both Kras- and Lin28a-overexpressing mice. These results suggest that articular cartilage thickness is mainly determined during the process of embryonic synovial joint development, which is positively regulated by Erk signaling.
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Affiliation(s)
- Tatsuya Kobayashi
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Anastasia Kozlova
- Endocrine Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
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62
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Barrio-Real L, Lopez-Haber C, Casado-Medrano V, Goglia AG, Toettcher JE, Caloca MJ, Kazanietz MG. P-Rex1 is dispensable for Erk activation and mitogenesis in breast cancer. Oncotarget 2018; 9:28612-24. [PMID: 29983884 DOI: 10.18632/oncotarget.25584] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 05/19/2018] [Indexed: 12/21/2022] Open
Abstract
Phosphatidylinositol-3,4,5-Trisphosphate Dependent Rac Exchange Factor 1 (P-Rex1) is a key mediator of growth factor-induced activation of Rac1, a small GTP-binding protein widely implicated in actin cytoskeleton reorganization. This Guanine nucleotide Exchange Factor (GEF) is overexpressed in human luminal breast cancer, and its expression associates with disease progression, metastatic dissemination and poor outcome. Despite the established contribution of P-Rex1 to Rac activation and cell locomotion, whether this Rac-GEF has any relevant role in mitogenesis has been a subject of controversy. To tackle the discrepancies among various reports, we carried out an exhaustive analysis of the potential involvement of P-Rex1 on the activation of the mitogenic Erk pathway. Using a range of luminal breast cancer cellular models, we unequivocally showed that silencing P-Rex1 (transiently, stably, using multiple siRNA sequences) had no effect on the phospho-Erk response upon stimulation with growth factors (EGF, heregulin, IGF-I) or a GPCR ligand (SDF-1). The lack of involvement of P-Rex1 in Erk activation was confirmed at the single cell level using a fluorescent biosensor of Erk kinase activity. Depletion of P-Rex1 from breast cancer cells failed to affect cell cycle progression, cyclin D1 induction, Akt activation and apoptotic responses. In addition, mammary-specific P-Rex1 transgenic mice (MMTV-P-Rex1) did not show any obvious hyperproliferative phenotype. Therefore, despite its crucial role in Rac1 activation and cell motility, P-Rex1 is dispensable for mitogenic or survival responses in breast cancer cells.
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63
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Peng X, Liu Y, Peng X, Wang Z, Zhang Z, Qiu Y, Jin M, Wang R, Kong D. Clinical features and the molecular biomarkers of olfactory neuroblastoma. Pathol Res Pract 2018; 214:1123-1129. [PMID: 29921494 DOI: 10.1016/j.prp.2018.06.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Revised: 06/06/2018] [Accepted: 06/06/2018] [Indexed: 01/07/2023]
Abstract
Olfactory neuroblastoma (ONB) is a kind of rare and complex head and neck tumor. The reports on this field are very scarce due to the low morbidity. Here, we summarized the clinical features and prognosis of ONB through analysis of 10 cases, and determined the phosphorylation status of some molecules known to be involved in carcinogesis such as Akt, Erk, Stat3 and Stat5 in ONB tissue. Ten ONB patients were recruited in this study, 6 male and 4 female, ranging from 26 to 66 years old. In the 10 cases, 6 were diagnosed as late T stage (T3/T4), 6 were at late Kadish stage (C/D) and 3 were at high Hyams grade (Ⅲ), which indicated a poorer prognosis. Patient characteristics-gender and tumor features were evaluated with respect to the overall survival (OS) through univariate analysis. The result indicated that the OS of male is obviously higher than that of female after a series of combined treatment. The OS of ONB patients in the late stage or high grade is lower than those in early stages or low grade. Moreover, p-Akt, p-Erk, p-Stat3 and p-Stat5 was detected in 5 (50%), 9 (90%), 7 (70%) and 0 patients (0%), respectively, suggesting the former 3 molecules might be potential biomarkers for diagnosis of ONB.
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Affiliation(s)
- Xiaolin Peng
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China; Department of Otorhinolaryngology Head and Neck Surgery, Tianjin first central hospital, Tianjin 300192, China
| | - Yao Liu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Xin Peng
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Zhengming Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Zhe Zhang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Yuling Qiu
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Meihua Jin
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Ran Wang
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China.
| | - Dexin Kong
- Tianjin Key Laboratory on Technologies Enabling Development of Clinical Therapeutics and Diagnostics, School of Pharmacy, Tianjin Medical University, Tianjin 300070, China; Research Center of Basic Medical Sciences, Tianjin Medical University, Tianjin 300070, China.
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64
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Alam SK, Astone M, Liu P, Hall SR, Coyle AM, Dankert EN, Hoffman DK, Zhang W, Kuang R, Roden AC, Mansfield AS, Hoeppner LH. DARPP-32 and t-DARPP promote non-small cell lung cancer growth through regulation of IKKα-dependent cell migration. Commun Biol 2018; 1:43. [PMID: 29782621 PMCID: PMC5959014 DOI: 10.1038/s42003-018-0050-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Lung cancer is the leading cause of cancer-related death worldwide. Here we demonstrate that elevated expression of dopamine and cyclic adenosine monophosphate-regulated phosphoprotein, Mr 32000 (DARPP-32) and its truncated splice variant t-DARPP promote lung tumor growth, while abrogation of DARPP-32 expression in human non-small cell lung cancer (NSCLC) cells reduces tumor growth in orthotopic mouse models. We observe a novel physical interaction between DARPP-32 and inhibitory kappa B kinase-α (IKKα) that promotes NSCLC cell migration through non-canonical nuclear factor kappa-light-chain-enhancer of activated B cells 2 (NF-κB2) signaling. Bioinformatics analysis of 513 lung adenocarcinoma patients reveals elevated t-DARPP isoform expression is associated with poor overall survival. Histopathological investigation of 62 human lung adenocarcinoma tissues also shows that t-DARPP expression is elevated with increasing tumor (T) stage. Our data suggest that DARPP-32 isoforms serve as a negative prognostic marker associated with increasing stages of NSCLC and may represent a novel therapeutic target.
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Affiliation(s)
- Sk Kayum Alam
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
| | - Matteo Astone
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
| | - Ping Liu
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, 55905, USA.,Department of Oncology, The Second Xiangya Hospital of Central South University, Changsha, Hunan, China
| | - Stephanie R Hall
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
| | - Abbygail M Coyle
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
| | - Erin N Dankert
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA
| | - Dane K Hoffman
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Wei Zhang
- Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Rui Kuang
- Department of Computer Science and Engineering, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Anja C Roden
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Aaron S Mansfield
- Department of Oncology, Division of Medical Oncology, Mayo Clinic, Rochester, MN, 55905, USA
| | - Luke H Hoeppner
- The Hormel Institute, University of Minnesota, Austin, MN, 55912, USA.
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65
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Molnar C, Estrada B, de Celis JF. Tay bridge and extracellular-regulated kinase activity are required for motoneuron function in the Drosophila neural system. Genes Brain Behav 2018. [PMID: 29524312 DOI: 10.1111/gbb.12470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Extracellular regulated kinase (Erk) activity is required during neural development for the specification of cell fates in neuroblasts and neuronal lineages, and also regulates several aspects of the activity and survival of mature neurons. The activation of Erk is regulated at multiple levels by kinases and phosphatases that alter its phosphorylation state and by other proteins that regulate its subcellular localization. Here, we find that tay bridge (tay), a negative regulator of Erk in Drosophila imaginal discs, is required in the motoneurons to regulate the number and size of neuromuscular synapses in these cells. The expression of Tay is maximal in motoneurons with low levels of activated ERK, suggesting that Tay modulates the activity of Erk in these cells. We also found that loss of tay expression and increased Erk activity specifically in the motoneurons cause a reversible decrease in walking speed. Impaired motoneurons activity may be caused by alterations in the functionality and number of synaptic boutons developing at the neuromuscular junction in tay mutants.
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Affiliation(s)
- C Molnar
- Centro de Biología Molecular "Severo Ochoa", CSIC and Universidad Autónoma de Madrid, Madrid, Spain.,Institute for Research in Biomedicine-Barcelona, Barcelona, Spain
| | - B Estrada
- Centro Andaluz de Biología del Desarrollo, CSIC and UPO, Sevilla, Spain
| | - J F de Celis
- Centro de Biología Molecular "Severo Ochoa", CSIC and Universidad Autónoma de Madrid, Madrid, Spain
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66
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Liu Y, Li F, Gao F, Xing L, Qin P, Liang X, Zhang J, Qiao X, Lin L, Zhao Q, Du L. Periostin promotes tumor angiogenesis in pancreatic cancer via Erk/VEGF signaling. Oncotarget 2018; 7:40148-40159. [PMID: 27223086 PMCID: PMC5129999 DOI: 10.18632/oncotarget.9512] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Accepted: 04/26/2016] [Indexed: 12/11/2022] Open
Abstract
Pancreatic cancer (PaC) consists of a bulk of stroma cells which contribute to tumor progression by releasing angiogenic factors. Recent studies have found that periostin (POSTN) is closely associate with the metastatic potential and prognosis of PaC. The purpose of this study is to determine the role of POSTN in tumor angiogenesis and explore the precise mechanisms. In this study, we used lentiviral shRNA and human recombinant POSTN protein (rPOSTN) to negatively and positively regulate POSTN expression in vitro. We found that increased POSTN expression promoted the tubule formation dependent on human umbilical vein endothelial cells (HUVECs). Moreover, knockdown of POSTN in PaC cells reduced tumor growth and VEGF expression in vivo. In accordance with these observations, we found that Erk phosphorylation and its downstream VEGF expression were upregulated achieved in rPOSTN-treated groups, opposing results were obversed in POSTN-slienced group. Meanwhile, Erk inhibitor SCH772984 significantly decreased VEGF expression as well as tubule formation of HUVECs in rPOSTN-treated PaC cells. Taken together, these findings suggest that POSTN promotes tumor angiogenesis via Erk/VEGF signaling in PaC and POSTN may be a new target for cancer anti-vascular treatment.
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Affiliation(s)
- Yang Liu
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Fan Li
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Feng Gao
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Lingxi Xing
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Peng Qin
- Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xingxin Liang
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Jiajie Zhang
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Xiaohui Qiao
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Lizhou Lin
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
| | - Qian Zhao
- Department of Pathophysiology, Key Laboratory of Cell Differentiation and Apoptosis and National Ministry of Education, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| | - Lianfang Du
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200080, China
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67
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Gunawardhana N, Jang S, Choi YH, Hong YA, Jeon YE, Kim A, Su H, Kim JH, Yoo YJ, Merrell DS, Kim J, Cha JH. Helicobacter pylori-Induced HB-EGF Upregulates Gastrin Expression via the EGF Receptor, C-Raf, Mek1, and Erk2 in the MAPK Pathway. Front Cell Infect Microbiol 2018; 7:541. [PMID: 29379775 PMCID: PMC5775237 DOI: 10.3389/fcimb.2017.00541] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 12/26/2017] [Indexed: 12/22/2022] Open
Abstract
Helicobacter pylori is associated with hypergastrinemia, which has been linked to the development of gastric diseases. Although the molecular mechanism is not fully understood, H. pylori is known to modulate the Erk pathway for induction of gastrin expression. Herein we found that an epidermal growth factor (EGF) receptor kinase inhibitor significantly blocked H. pylori-induced gastrin promoter activity, suggesting involvement of EGF receptor ligands. Indeed, H. pylori induced mRNA expression of EGF family members such as amphiregulin, EGF, heparin-binding EGF-like growth factor (HB-EGF), and transforming growth factor-α. Of these, specific siRNA targeting of HB-EGF significantly blocked H. pylori-induced gastrin expression. Moreover, H. pylori induced HB-EGF ectodomain shedding, which we found to be a critical process for H. pylori-induced gastrin expression. Thus, we demonstrate a novel role for human mature HB-EGF in stimulating gastrin promoter activity during H. pylori infection. Further investigation using specific siRNAs targeting each isoform of Raf, Mek, and Erk elucidated that the mechanism underlying H. pylori-induced gastrin expression can be delineated as the sequential activation of HB-EGF, the EGF receptor, C-Raf, Mek1, and the Erk2 molecules in the MAPK pathway. Surprisingly, whereas Erk2 acts as a potent activator of gastrin expression, siRNA knockdown of Erk1 induced gastrin promoter activity, suggesting that Erk1 typically acts as a repressor of gastrin expression. Elucidation of the mechanism of gastrin modulation by HB-EGF-mediated EGF receptor transactivation should facilitate the development of therapeutic strategies against H. pylori-related hypergastrinemia and consequently gastric disease development, including gastric cancers.
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Affiliation(s)
- Niluka Gunawardhana
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea.,Department of Basic Sciences, Faculty of Dental Sciences, University of Peradeniya, Peradeniya, Sri Lanka
| | - Sungil Jang
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - Yun Hui Choi
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - Youngmin A Hong
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - Yeong-Eui Jeon
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - Aeryun Kim
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - Hanfu Su
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea.,Microbiology and Molecular Biology, Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ji-Hye Kim
- Department of Dental Hygiene, Jeonju Kijeon College, Jeonju, South Korea
| | - Yun-Jung Yoo
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - D Scott Merrell
- Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, MD, United States
| | - Jinmoon Kim
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea
| | - Jeong-Heon Cha
- Department of Oral Biology, Oral Science Research Center, Department of Applied Life Science, The Graduate School, BK21 Plus Project, Yonsei University College of Dentistry, Seoul, South Korea.,Microbiology and Molecular Biology, Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, China
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68
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Goshen-Lago T, Melamed D, Admon A, Engelberg D. Isolation and Characterization of Intrinsically Active (MEK-Independent) Mutants of Mpk1/ Erk. Methods Mol Biol 2018; 1487:65-88. [PMID: 27924559 DOI: 10.1007/978-1-4939-6424-6_5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The extracellular-regulated kinase (Erk) pathway is a major determinant in the control of diverse cellular processes, such as proliferation, differentiation, survival, and motility. The pathway executes its effects through kinases of the Erk family. Erks are not only critical for a variety of physiological processes, but are also associated with neurodegenerative diseases, cardiovascular diseases, diabetes and a large number of human cancers. However, the exact role of each Erk molecule in these biological and pathological processes is not fully determined. An efficient strategy for revealing these roles is to activate each Erk isoform individually, in a signal independent manner, and to monitor the molecular, physiological, and pathological effects. This could be achieved by developing intrinsically active variants for each Erk isoform and splicing variant and expressing these molecules individually in biological systems. A screening method that selects for relevant and useful active mutants of Erks is described in this chapter. The main principle of the method is to screen for mutants of Erk that function in the total absence of their relevant MEKs. Another principle is that the screen should be unbiased toward particular domains or mechanisms of action. We describe how these principles are combined into a screen that takes advantage of the yeast Mpk1/Erk pathway. Following the description of how intrinsically active Mpk1 molecules are isolated, we provide comprehensive and detailed descriptions of the methods used to characterize their catalytic activity, autophosphorylation capabilities, and phosphorylation status, as well as the methods used to determine the precise phosphorylated sites. The principles of the screen and the methods described here could be easily adapted for any Erk molecule in any organism.
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Affiliation(s)
- Tal Goshen-Lago
- Department of Biological Chemistry, The Institute of Life Science, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Dganit Melamed
- Faculty of Biology, Technion - Israel Institute of Technology, Haifa, 32000, Israel
| | - Arie Admon
- Faculty of Biology, Technion - Israel Institute of Technology, Haifa, 32000, Israel
| | - David Engelberg
- Department of Biological Chemistry, The Institute of Life Science, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel. .,CREATE-NUS-HUJ Cellular & Molecular Mechanisms of Inflammation Programme, National University of Singapore, 1 CREATE WAY, Innovation Wing, #03-09, Singapore, 138602, Singapore. .,Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, 117456, Singapore.
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69
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Suen KM, Lin CC, Seiler C, George R, Poncet-Montange G, Biter AB, Ahmed Z, Arold ST, Ladbury JE. Phosphorylation of threonine residues on Shc promotes ligand binding and mediates crosstalk between MAPK and Akt pathways in breast cancer cells. Int J Biochem Cell Biol 2018; 94:89-97. [PMID: 29208567 DOI: 10.1016/j.biocel.2017.11.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/16/2017] [Accepted: 11/30/2017] [Indexed: 01/14/2023]
Abstract
Scaffold proteins play important roles in regulating signalling network fidelity, the absence of which is often the basis for diseases such as cancer. In the present work, we show that the prototypical scaffold protein Shc is phosphorylated by the extracellular signal-regulated kinase, Erk. In addition, Shc threonine phosphorylation is specifically up-regulated in two selected triple-negative breast cancer (TNBC) cell lines. To explore how Erk-mediated threonine phosphorylation on Shc might play a role in the dysregulation of signalling events, we investigated how Shc affects pathways downstream of EGF receptor. Using an in vitro model and biophysical analysis, we show that Shc threonine phosphorylation is responsible for elevated Akt and Erk signalling, potentially through the recruitment of the 14-3-3 ζ and Pin-1 proteins.
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Affiliation(s)
- K M Suen
- Department of Biochemistry and Molecular Biology, The University of Texas MD Anderson Cancer Center, Unit 1954, 1515 Holcombe Blvd, Houston, TX 77030, USA; Graduate School of Biological Sciences, The University of Texas MD Anderson Cancer Center, Unit 1954, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - C C Lin
- School of Molecular and Cellular Biology, University of Leeds, LC Miall Building, Leeds, LS2 9JT, UK
| | - C Seiler
- School of Molecular and Cellular Biology, University of Leeds, LC Miall Building, Leeds, LS2 9JT, UK
| | - R George
- Structural Biology STP, The Francis Crick Institute, Lincolns Inn Fields Laboratory, 44 Lincolns Inn Fields, Holborn, London, WC2A 3LY, UK
| | - G Poncet-Montange
- Orthogon Therapeutics, 960 Turnpike Street, Unit 10, Canton, MA 02021, USA
| | - A B Biter
- Sabin Vaccine Institute and Texas Children's Hospital Center for Vaccine Development, 1102 Bates Avenue, Houston, TX 77030, USA
| | - Z Ahmed
- Department of Biochemistry and Molecular Biology, The University of Texas MD Anderson Cancer Center, Unit 1954, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - S T Arold
- Division of Biological and Environmental Sciences and Engineering, CBRC, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - J E Ladbury
- School of Molecular and Cellular Biology, University of Leeds, LC Miall Building, Leeds, LS2 9JT, UK.
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70
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Abstract
The accessibility and optical transparency of the zebrafish embryo offers a unique platform for live-imaging of developmental lymphangiogenesis. Transgenic lines labelling lymphatic progenitors and vessels enable researchers to visualize cellular processes and ask how they contribute to lymphatic development in genetic models. Furthermore, validated immunofluorescence staining for key signaling and cell fate markers (phosphorylated Erk and Prox1) allow single cell resolution studies of lymphatic differentiation. Here, we describe in detail how zebrafish embryos and larvae can be mounted for high resolution, staged imaging of lymphatic networks, how lymphangiogenesis can be reliably quantified and how immunofluorescence can reveal lymphatic signaling and differentiation. These methods offer researchers the opportunity to experimentally dissect developmental lymphangiogenesis with outstanding resolution.
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Affiliation(s)
- Kazuhide S Okuda
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Sungmin Baek
- Stowers Institute for Medical Research, Kansas city, MO, USA.,Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia
| | - Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, Australia.
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Ma L, Jiang Y, Dong Y, Gao J, Du B, Liu D. Anti-TNF-alpha antibody attenuates subarachnoid hemorrhage-induced apoptosis in the hypothalamus by inhibiting the activation of Erk. Neuropsychiatr Dis Treat 2018; 14:525-536. [PMID: 29497296 PMCID: PMC5819588 DOI: 10.2147/ndt.s154809] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Subarachnoid hemorrhage (SAH) can induce apoptosis in many regions of the brain including the cortex and hippocampus. However, few studies have focused on apoptosis in the hypothalamus after SAH. Although some antiapoptotic strategies have been developed for SAH, such as anti-tumor necrosis factor-alpha (TNF-α) antibody, the molecular mechanisms underlying this condition have yet to be elucidated. Therefore, the purpose of this study was to evaluate whether SAH could induce apoptosis in the hypothalamus and identify the potential molecular mechanisms underlying the actions of anti-TNF-α antibody, as a therapeutic regimen, upon apoptosis. MATERIALS AND METHODS SAH was induced in a rat model. Thirty minutes prior to SAH, anti-TNF-α antibody or U0126, an extracellular signal-regulated kinase (Erk) inhibitor, was microinjected into the left lateral cerebral ventricle. In addition, phorbol-12-myristate-13-acetate was injected intraperitoneally immediately after the anti-TNF-α antibody microinjection. Then, real-time polymerase chain reaction, Western blotting and immunohistochemistry were used to detect the expression of caspase-3, bax, bcl-2, phosphorylated Erk (p-Erk) and Erk. Finally, anxiety-like behavior was identified by using open field. RESULTS Levels of caspase-3, bax and bcl-2, all showed a temporary rise after SAH in the hypothalamus, indicating the induction of apoptosis in this brain region. Interestingly, we found that the microinjection of anti-TNF-α antibody could selectively block the elevated levels of bax, suggesting the potential role of anti-TNF-α antibody in the inhibition of SAH-induced apoptosis in the hypothalamus. Moreover, we found that Erk activation was necessary for apoptosis after SAH and that the microinfusion of anti-TNF-α antibody could inhibit apoptosis by suppressing the increase of p-Erk in the hypothalamus. Finally, our data indicated that the infusion of anti-TNF-α antibody could improve anxiety-like behavior. CONCLUSION Collectively, our data demonstrate that anti-TNF-α antibody attenuates apoptosis in the hypothalamus by inhibiting the activation of Erk, which plays an important role in the treatment of SAH.
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Affiliation(s)
- Ling Ma
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, People's Republic of China
| | - Yong Jiang
- Department of Neurosurgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
| | - Yanan Dong
- Department of Neurosurgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
| | - Jun Gao
- Department of Neurosurgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
| | - Bin Du
- Department of Neurosurgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
| | - Dianwei Liu
- Department of Neurosurgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shandong, People's Republic of China
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Chan WK, Price DJ, Pratt T. FGF8 morphogen gradients are differentially regulated by heparan sulphotransferases Hs2st and Hs6st1 in the developing brain. Biol Open 2017; 6:1933-1942. [PMID: 29158323 PMCID: PMC5769653 DOI: 10.1242/bio.028605] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 11/10/2017] [Indexed: 01/02/2023] Open
Abstract
Fibroblast growth factor (FGF) morphogen signalling through the evolutionarily ancient extracellular signalling-regulated kinase/mitogen activated protein kinase (ERK/MAPK) pathway recurs in many neural and non-neural developmental contexts, and understanding the mechanisms that regulate FGF/ERK function are correspondingly important. The glycosaminoglycan heparan sulphate (HS) binds to FGFs and exists in an enormous number of differentially sulphated forms produced by the action of HS modifying enzymes, and so has the potential to present an extremely large amount of information in FGF/ERK signalling. Although there have been many studies demonstrating that HS is an important regulator of FGF function, experimental evidence on the role of the different HS modifying enzymes on FGF gradient formation has been lacking until now. We challenged ex vivo developing mouse neural tissue, in which HS had either been enzymatically removed by heparanase treatment or lacking either the HS modifying enzymes Hs2st (Hs2st-/- tissue) or Hs6st1 (Hs6st1-/- tissue), with exogenous Fgf8 to gain insight on how HS and the function of these two HS modifying enzymes impacts on Fgf8 gradient formation from an exogenously supplied source of Fgf8 protein. We discover that two different HS modifying enzymes, Hs2st and Hs6st1, indeed differentially modulate the properties of emerging Fgf8 protein concentration gradients and the Erk signalling output in response to Fgf8 in living tissue in ex vivo cultures. Both Hs2st and Hs6st1 are required for stable Fgf8 gradients to form as rapidly as they do in wild-type tissue while only Hs6st1 has a significant effect on suppressing the levels of Fgf8 protein in the gradient compared to wild type. Next we show that Hs2st and Hs6st1 act to antagonise and agonise the Erk signalling in response to Fgf8 protein, respectively, in ex vivo cultures of living tissue. Examination of endogenous Fgf8 protein and Erk signalling outputs in Hs2st-/- and Hs6st1-/- embryos suggests that our ex vivo findings have physiological relevance in vivo Our discovery identifies a new class of mechanism to tune Fgf8 function by regulated expression of Hs2st and Hs6st1 that is likely to have broader application to the >200 other signalling proteins that interact with HS and their function in neural development and disease.
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Affiliation(s)
- Wai-Kit Chan
- Centre for Integrative Physiology, Edinburgh Medical School Biomedical Sciences, The University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - David J Price
- Centre for Integrative Physiology, Edinburgh Medical School Biomedical Sciences, The University of Edinburgh, Edinburgh, EH8 9XD, UK
| | - Thomas Pratt
- Centre for Integrative Physiology, Edinburgh Medical School Biomedical Sciences, The University of Edinburgh, Edinburgh, EH8 9XD, UK
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Ma C, Karwacki-Neisius V, Tang H, Li W, Shi Z, Hu H, Xu W, Wang Z, Kong L, Lv R, Fan Z, Zhou W, Yang P, Wu F, Diao J, Tan L, Shi YG, Lan F, Shi Y. Nono, a Bivalent Domain Factor, Regulates Erk Signaling and Mouse Embryonic Stem Cell Pluripotency. Cell Rep 2017; 17:997-1007. [PMID: 27760330 DOI: 10.1016/j.celrep.2016.09.078] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Revised: 08/29/2016] [Accepted: 09/22/2016] [Indexed: 10/20/2022] Open
Abstract
Nono is a component of the para-speckle, which stores and processes RNA. Mouse embryonic stem cells (mESCs) lack para-speckles, leaving the function of Nono in mESCs unclear. Here, we find that Nono functions as a chromatin regulator cooperating with Erk to regulate mESC pluripotency. We report that Nono loss results in robust self-renewing mESCs with epigenomic and transcriptomic features resembling the 2i (GSK and Erk inhibitors)-induced "ground state." Erk interacts with and is required for Nono localization to a subset of bivalent genes that have high levels of poised RNA polymerase. Nono loss compromises Erk activation and RNA polymerase poising at its target bivalent genes in undifferentiated mESCs, thus disrupting target gene activation and differentiation. These findings argue that Nono collaborates with Erk signaling to regulate the integrity of bivalent domains and mESC pluripotency.
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Affiliation(s)
- Chun Ma
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Violetta Karwacki-Neisius
- Newborn Medicine Division, Boston Children's Hospital, Boston, MA 02115, USA; Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Haoran Tang
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Wenjing Li
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Zhennan Shi
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Haolin Hu
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Wenqi Xu
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Zhentian Wang
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Lingchun Kong
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Ruitu Lv
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Zheng Fan
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Wenhao Zhou
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China
| | - Pengyuan Yang
- Department of Systems Biology, Institutes of Biomedical Sciences, Fudan University, 138 Yixue Yuan Road, Shanghai 200032, China
| | - Feizhen Wu
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Jianbo Diao
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Li Tan
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Yujiang Geno Shi
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Division of Endocrinology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Fei Lan
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China.
| | - Yang Shi
- Key Laboratory of Birth Defects, Children's Hospital and Key Laboratory of Epigenetics, Institutes of Biomedical Sciences, Fudan University, Shanghai 201102, China; Key Laboratory of Metabolism and Molecular Medicine, Ministry of Education, Department of Cellular and Genetic Medicine, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China; Newborn Medicine Division, Boston Children's Hospital, Boston, MA 02115, USA; Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA.
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Ryu BK, Lee MG, Kim NH, Lee KY, Oh SJ, Moon JR, Kim HJ, Chi SG. Bidirectional alteration of Cav-1 expression is associated with mitogenic conversion of its function in gastric tumor progression. BMC Cancer 2017; 17:766. [PMID: 29141593 DOI: 10.1186/s12885-017-3770-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 11/10/2017] [Indexed: 01/05/2023] Open
Abstract
Background Expression of caveolin-1 (Cav-1) is frequently altered in many human cancers and both tumor suppression and promotion functions of Cav-1 have been suggested based on its expression status. However, it remains unanswered how Cav-1 provokes opposite effects in different cancers or different phases of tumor progression. Methods To explore the implication of Cav-1 alteration in gastric tumorigenesis, the expression and mutational status of Cav-1 and its effects on tumor cell growth were characterized. Results A substantial fraction of primary tumors and cell lines displayed abnormally low or high Cav-1 mRNA expression, indicating the bidirectional alteration of Cav-1 in gastric cancers. While allelic imbalance and mutational alterations of the Cav-1 gene were rarely detected, aberrant promoter hyper- or hypo-methylation showed a tight correlation with bidirectional alteration of its expression. Abnormally low and high Cav-1 expression was more frequently observed in early and advanced cancers, respectively, suggesting the oncogenic switch of its function in tumor progression. Cell cycle progression, DNA synthesis, and colony forming ability were markedly decreased by Cav-1 transfection in low-expressing tumor cells but by its depletion in high-expressing cells. Interestingly, Cav-1 exerted opposite effects on MEK-ERK signaling in these two cell types through the reciprocal regulation of the RAF-ERK negative feedback loop. A feedback inhibition of RAF by ERK was stimulated by restoration of Cav-1 expression in low-expressing cells but by it depletion in high-expressing cells. As predicted, the opposite effects of Cav-1 on both tumor cell growth and inhibitory RAF phosphorylation were abolished if ERK is depleted. Conclusion Bidirectional alteration of Cav-1 is linked to its opposite effects on gastric tumor cell growth, which stem from the reciprocal control on the RAF-ERK negative feedback loop.
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Feng Y, Ke J, Cao P, Deng M, Li J, Cai H, Meng Q, Li Y, Long X. HMGB1-induced angiogenesis in perforated disc cells of human temporomandibular joint. J Cell Mol Med 2017; 22:1283-1291. [PMID: 29083089 PMCID: PMC5783830 DOI: 10.1111/jcmm.13410] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 08/29/2017] [Indexed: 11/29/2022] Open
Abstract
High mobility group 1 protein (HMGB1), a highly conserved nuclear DNA‐binding protein and inflammatory mediator, has been recently found to be involved in angiogenesis. Our previous study has demonstrated the elevation of HMGB1 in the tissue of perforated disc of temporomandibular joint (TMJ). Here, we investigated a novel mediator of HMGB1 in regulating hypoxia‐inducible factor‐1α (HIF‐1α) and vascular endothelial growth factor (VEGF) to mediate angiogenesis in perforated disc cells of TMJ. HMGB1 increased the expression of HIF‐1α and VEGF in a dose‐ and time‐dependent manner in these cells. Moreover, immunofluorescence assay exhibits that the HIF‐1α were activated by HMGB1. In addition, HMGB1 activated extracellular signal‐related kinase 1/2 (Erk1/2), Jun N‐terminal kinase (JNK), but not P38 in these cells. Furthermore, both U0126 (ErK inhibitor) and SP600125 (JNK inhibitor) significantly suppressed the enhanced production of HIF‐1α and VEGF induced by HMGB1. Tube formation of human umbilical vein endothelial cells (HUVECs) was significantly increased by exposure to conditioned medium derived from HMGB1‐stimulated perforated disc cells, while attenuated with pre‐treatment of inhibitors for VEGF, HIF‐1α, Erk and JNK, individually. Therefore, abundance of HMGB1 mediates activation of HIF‐1α in disc cells via Erk and JNK pathway and then, initiates VEGF secretion, thereby leading to disc angiogenesis and accelerating degenerative change of the perforated disc.
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Affiliation(s)
- Yaping Feng
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Jin Ke
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Pinyin Cao
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST), Key Laboratory of Oral Biomedicine Ministry of Education (KLOBM), School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Mohong Deng
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Jian Li
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Hengxing Cai
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Qinggong Meng
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Yingjie Li
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
| | - Xing Long
- Department of Oral and Maxillofacial Surgery, School and Hospital of Stomatology, Wuhan University, Wuhan, Hubei, China
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Im DS, Lee JM, Lee J, Shin HJ, No KT, Park SH, Kim K. Inhibition of collagenase and melanogenesis by ethanol extracts of Orostachys japonicus A. Berger: possible involvement of Erk and Akt signaling pathways in melanoma cells. Acta Biochim Biophys Sin (Shanghai) 2017; 49:945-953. [PMID: 28981602 DOI: 10.1093/abbs/gmx090] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 07/28/2017] [Indexed: 12/12/2022] Open
Abstract
Orostachys japonicus is an herb that contains several functional components and has traditionally been used to treat various diseases in Asia. In this study, bioactive components from different parts of the O. japonicus plant were investigated, and the contents of the functional components in ethanol extracts of O. japonicus cultivated in Korea and China were compared. The antioxidant effects of O. japonicus ethanol extracts were investigated using Raw 264.7 cells. It was found that 2,2-diphenyl-1-picrylhydrazyl radical-scavenging activity was significantly decreased in the cells treated with the extracts. Moreover, the novel inhibitory functions of O. japonicus extracts on collagenase, elastase, and tyrosinase were established. We also found that O. japonicus extracts strongly inhibited melanin synthesis in B16F10 melanoma cells by decreasing MITF protein levels and activating the Erk and Akt signaling pathways. Thus, these findings would be useful for developing new cosmetic and pharmaceutical formulations based on O. japonicus extracts.
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Affiliation(s)
- Dai Sig Im
- Department of Chemistry, Soonchunhyang University, Asan 31538, Republic of Korea
- SH Company, Asan 31538, Republic of Korea
| | - Jong-Min Lee
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - Jongsung Lee
- Department of Genetic Engineering, Sungkyunkwan University, Suwon 16419,Republic of Korea
| | - Hye Jin Shin
- Department of Chemistry, Soonchunhyang University, Asan 31538,Republic of Korea
| | - Kyoung Tai No
- Department of Biotechnology, College of Life Science and Biotechnology, Yonsei University, Seoul 03722, Republic of Korea
| | - See-Hyoung Park
- Department of Bio and Chemical Engineering, Hongik University, Sejong 30016, Republic of Korea
| | - Kiyoung Kim
- Department of Medical Biotechnology, Soonchunhyang University, Asan 31538, Republic of Korea
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Banisch TU, Maimon I, Dadosh T, Gilboa L. Escort cells generate a dynamic compartment for germline stem cell differentiation via combined Stat and Erk signalling. Development 2017; 144:1937-1947. [PMID: 28559239 DOI: 10.1242/dev.143727] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Accepted: 04/21/2017] [Indexed: 01/01/2023]
Abstract
Two different compartments support germline stem cell (GSC) self-renewal and their timely differentiation: the classical niche provides maintenance cues, while a differentiation compartment, formed by somatic escort cells (ECs), is required for proper GSC differentiation. ECs extend long protrusions that invade between tightly packed germ cells, and alternate between encapsulating and releasing them. How ECs achieve this dynamic balance has not been resolved. By combining live imaging and genetic analyses in Drosophila, we have characterised EC shapes and their dynamic changes. We show that germ cell encapsulation by ECs is a communal phenomenon, whereby EC-EC contacts stabilise an extensive meshwork of protrusions. We further show that Signal Transducer and Activator of Transcription (Stat) and Epidermal Growth Factor Receptor (Egfr) signalling sustain EC protrusiveness and flexibility by combinatorially affecting the activity of different RhoGTPases. Our results reveal how a complex signalling network can determine the shape of a cell and its dynamic behaviour. It also explains how the differentiation compartment can establish extensive contacts with germ cells, while allowing a continual posterior movement of differentiating GSC daughters.
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Affiliation(s)
- Torsten U Banisch
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Iris Maimon
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Tali Dadosh
- Electron Microscopy Unit, Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lilach Gilboa
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
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Shin NR, Ryu HW, Ko JW, Park SH, Yuk HJ, Kim HJ, Kim JC, Jeong SH, Shin IS. Artemisia argyi attenuates airway inflammation in ovalbumin-induced asthmatic animals. J Ethnopharmacol 2017; 209:108-115. [PMID: 28735728 DOI: 10.1016/j.jep.2017.07.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/08/2017] [Accepted: 07/19/2017] [Indexed: 06/07/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Artemisia argyi is a traditional herbal medicine in Korea and commonly called as mugwort. It is traditionally used as food source and tea to control abdominal pain, dysmenorrhea, uterine hemorrhage, and inflammation. AIM OF THE STUDY We investigated the effects of A. argyi (TOTAL) and dehydromatricarin A (DA), its active component on ovalbumin (OVA)-induced allergic asthma. MATERIALS AND METHODS The animals were sensitized on day 0 and 14 by intraperitoneal injection of OVA with aluminum hydroxide. On day 21, 22 and 23 after the initial sensitization, the animals received an airway challenge with OVA for 1h using an ultrasonic nebulizer. TOTAL (50 and 100mg/kg) or DA (10 and 20mg/kg) were administered to mice by oral gavage once daily from day 18-23. Airway hyperresponsiveness (AHR) was measured 24h after final OVA challenge. RESULT TOTAL and DA treated animals reduced inflammatory cell counts, cytokines and AHR in asthmatic animals, which was accompanied with inflammatory cell accumulation and mucus hypersecretion. Furthermore, TOTAL and DA significantly declined Erk phosphorylation and the expression of MMP-9 in asthmatic animals. CONCLUSION In conclusion, we indicate that Total and DA suppress allergic inflammatory responses caused by OVA challenge. It was considered that A. argyi has a potential for treating allergic asthma.
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Affiliation(s)
- Na-Rae Shin
- College of Veterinary Medicine (BK21 project team), Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Hyung-Won Ryu
- Natural Medicine Research Center, Korea Research Institute of Bioscience&Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Chungju-si, Chungbuk 28116, Republic of Korea
| | - Je-Won Ko
- College of Veterinary Medicine (BK21 project team), Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Sung-Hyeuk Park
- College of Veterinary Medicine (BK21 project team), Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Heung-Joo Yuk
- Natural Medicine Research Center, Korea Research Institute of Bioscience&Biotechnology, 30 Yeongudanji-ro, Ochang-eup, Cheongwon-gu, Chungju-si, Chungbuk 28116, Republic of Korea
| | - Ha-Jung Kim
- College of Veterinary Medicine (BK21 project team), Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Jong-Choon Kim
- College of Veterinary Medicine (BK21 project team), Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
| | - Seong-Hun Jeong
- Namhae Garlic Research Institute, Namhae-gun, Kyungnam 668-812, Republic of Korea.
| | - In-Sik Shin
- College of Veterinary Medicine (BK21 project team), Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea.
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Wilson MZ, Ravindran PT, Lim WA, Toettcher JE. Tracing Information Flow from Erk to Target Gene Induction Reveals Mechanisms of Dynamic and Combinatorial Control. Mol Cell 2017; 67:757-769.e5. [PMID: 28826673 DOI: 10.1016/j.molcel.2017.07.016] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 06/12/2017] [Accepted: 07/13/2017] [Indexed: 10/19/2022]
Abstract
Cell signaling networks coordinate specific patterns of protein expression in response to external cues, yet the logic by which signaling pathway activity determines the eventual abundance of target proteins is complex and poorly understood. Here, we describe an approach for simultaneously controlling the Ras/Erk pathway and monitoring a target gene's transcription and protein accumulation in single live cells. We apply our approach to dissect how Erk activity is decoded by immediate early genes (IEGs). We find that IEG transcription decodes Erk dynamics through a shared band-pass filtering circuit; repeated Erk pulses transcribe IEGs more efficiently than sustained Erk inputs. However, despite highly similar transcriptional responses, each IEG exhibits dramatically different protein-level accumulation, demonstrating a high degree of post-transcriptional regulation by combinations of multiple pathways. Our results demonstrate that the Ras/Erk pathway is decoded by both dynamic filters and logic gates to shape target gene responses in a context-specific manner.
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Affiliation(s)
- Maxwell Z Wilson
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Pavithran T Ravindran
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, USA
| | - Wendell A Lim
- Howard Hughes Medical Institute; Department of Cellular and Molecular Pharmacology, University of California, San Francisco, San Francisco, CA 94158, USA
| | - Jared E Toettcher
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA.
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80
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Tachibana N, Cantrup R, Dixit R, Touahri Y, Kaushik G, Zinyk D, Daftarian N, Biernaskie J, McFarlane S, Schuurmans C. Pten Regulates Retinal Amacrine Cell Number by Modulating Akt, Tgfβ, and Erk Signaling. J Neurosci 2016; 36:9454-71. [PMID: 27605619 DOI: 10.1523/JNEUROSCI.0936-16.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Accepted: 07/18/2016] [Indexed: 12/11/2022] Open
Abstract
UNLABELLED All tissues are genetically programmed to acquire an optimal size that is defined by total cell number and individual cellular dimensions. The retina contains stereotyped proportions of one glial and six neuronal cell types that are generated in overlapping waves. How multipotent retinal progenitors know when to switch from making one cell type to the next so that appropriate numbers of each cell type are generated is poorly understood. Pten is a phosphatase that controls progenitor cell proliferation and differentiation in several lineages. Here, using a conditional loss-of-function strategy, we found that Pten regulates retinal cell division and is required to produce the full complement of rod photoreceptors and amacrine cells in mouse. We focused on amacrine cell number control, identifying three downstream Pten effector pathways. First, phosphoinositide 3-kinase/Akt signaling is hyperactivated in Pten conditional knock-out (cKO) retinas, and misexpression of constitutively active Akt (Akt-CA) in retinal explants phenocopies the reduction in amacrine cell production observed in Pten cKOs. Second, Akt-CA activates Tgfβ signaling in retinal explants, which is a negative feedback pathway for amacrine cell production. Accordingly, Tgfβ signaling is elevated in Pten cKO retinas, and epistatic analyses placed Pten downstream of TgfβRII in amacrine cell number control. Finally, Pten regulates Raf/Mek/Erk signaling levels to promote the differentiation of all amacrine cell subtypes, which are each reduced in number in Pten cKOs. Pten is thus a positive regulator of amacrine cell production, acting via multiple downstream pathways, highlighting its diverse actions as a mediator of cell number control. SIGNIFICANCE STATEMENT Despite the importance of size for optimal organ function, how individual cell types are generated in correct proportions is poorly understood. There are several ways to control cell number, including readouts of organ function (e.g., secreted hormones reach functional levels when enough cells are made) or counting of cell divisions or cell number. The latter applies to the retina, where cell number is regulated by negative feedback signals, which arrest differentiation of particular cell types at threshold levels. Herein, we show that Pten is a critical regulator of amacrine cell number in the retina, acting via multiple downstream pathways. Our studies provide molecular insights into how PTEN loss in humans may lead to uncontrolled cell division in several pathological conditions.
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81
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Khan TK, Wender PA, Alkon DL. Bryostatin and its synthetic analog, picolog rescue dermal fibroblasts from prolonged stress and contribute to survival and rejuvenation of human skin equivalents. J Cell Physiol 2017; 233:1523-1534. [PMID: 28590053 DOI: 10.1002/jcp.26043] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 06/06/2017] [Indexed: 11/09/2022]
Abstract
Skin health is associated with the day-to-day activity of fibroblasts. The primary function of fibroblasts is to synthesize structural proteins, such as collagen, extracellular matrix proteins, and other proteins that support the structural integrity of the skin and are associated with younger, firmer, and more elastic skin that is better able to resist and recover from injury. At sub-nanomolar concentrations (0.03-0.3 nM), bryostatin-1 and its synthetic analog, picolog (0.1-10 nM) sustained the survival and activation of human dermal fibroblasts cultured under the stressful condition of prolonged serum deprivation. Bryostatin-1 treatment stabilized human skin equivalents (HSEs), a bioengineered combination of primary human skin cells (keratinocytes and dermal fibroblasts) on an extracellular matrix composed of mainly collagen. Fibroblasts activated by bryostatin-1 protected the structural integrity of HSEs. Bryostatin-1 and picolog prolonged activation of Erk in fibroblasts to promote cell survival. Chronic stress promotes the progression of apoptosis. Dermal fibroblasts constitutively express all components of Fas associated apoptosis, including caspase-8, an initiator enzyme of apoptosis. Prolong bryostatin-1 treatment reduced apoptosis by decreasing caspase-8 and protected dermal fibroblasts. Our data suggest that bryostatin-1 and picolog could be useful in anti-aging skincare, and could have applications in tissue engineering and regenerative medicine.
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Affiliation(s)
- Tapan K Khan
- Center for Neurodegenerative Diseases, Blanchette Rockefeller Neurosciences Institute at West Virginia University, Morgantown, West Virginia
| | - Paul A Wender
- Department of Chemistry, Stanford University, Stanford, California.,Department of Chemical and Systems Biology, Stanford University, Stanford, California
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82
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Huo J, Huang Y, Xu S, Lam KP. Analysis of Signaling Events in B-1a Cells. Methods Mol Biol 2017; 1643:75-83. [PMID: 28667530 DOI: 10.1007/978-1-4939-7180-0_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
B-1a cells are a unique subset of B cells that are phenotypically and functionally distinguishable from conventional (B-2) cells. Here we detail methods to analyze signaling events in B-1a cells. We demonstrate by flow cytometry and Western blot that mouse peritoneal B-1a but not splenic B-2 cells have constitutive activation of signal transducers and activators of transcription-3 (Stat3) and extracellular signal-regulated kinase (Erk).
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83
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Miedlich SU, Taya M, Young MR, Hammes SR. Paxillin and embryonic PolyAdenylation Binding Protein (ePABP) engage to regulate androgen-dependent Xenopus laevis oocyte maturation - A model of kinase-dependent regulation of protein expression. Mol Cell Endocrinol 2017; 448:87-97. [PMID: 28359799 PMCID: PMC5500300 DOI: 10.1016/j.mce.2017.03.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Revised: 03/25/2017] [Accepted: 03/25/2017] [Indexed: 01/01/2023]
Abstract
Steroid-triggered Xenopus laevis oocyte maturation is an elegant physiologic model of nongenomic steroid signaling, as it proceeds completely independent of transcription. We previously demonstrated that androgens are the main physiologic stimulator of oocyte maturation in Xenopus oocytes, and that the adaptor protein paxillin plays a crucial role in mediating this process through a positive feedback loop in which paxillin first enhances Mos protein translation, ensued by Erk2 activation and Erk-dependent phosphorylation of paxillin on serine residues. Phosphoserine-paxillin then further augments Mos protein translation and downstream Erk2 activation, resulting in meiotic progression. We hypothesized that paxillin enhances Mos translation by interacting with embryonic PolyAdenylation Binding Protein (ePABP) on polyadenylated Mos mRNA. Knockdown of ePABP phenocopied paxillin knockdown, with reduced Mos protein expression, Erk2 and Cdk1 activation, as well as oocyte maturation. In both Xenopus oocytes and mammalian cells (HEK-293), paxillin and ePABP constitutively interacted. Testosterone (Xenopus) or EGF (HEK-293) augmented ePABP-paxillin binding, as well as ePABP binding to Mos mRNA (Xenopus), in an Erk-dependent fashion. Thus, ePABP and paxillin work together in an Erk-dependent fashion to enhance Mos protein translation and promote oocyte maturation.
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Affiliation(s)
- Susanne U Miedlich
- Division of Endocrinology and Metabolism, Department of Medicine, University of Rochester School of Medicine and Dentistry, Box 693, 601 Elmwood Ave, Rochester, NY 14642, USA.
| | - Manisha Taya
- Division of Endocrinology and Metabolism, Department of Medicine, University of Rochester School of Medicine and Dentistry, Box 693, 601 Elmwood Ave, Rochester, NY 14642, USA
| | - Melissa Rasar Young
- Department of Therapeutic Radiology, Smilow Cancer Hospital at Yale, Yale School of Medicine, 35 Park Street, New Haven, CT 06511, USA
| | - Stephen R Hammes
- Division of Endocrinology and Metabolism, Department of Medicine, University of Rochester School of Medicine and Dentistry, Box 693, 601 Elmwood Ave, Rochester, NY 14642, USA
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84
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Shigematsu Y, Oue N, Nishioka Y, Sakamoto N, Sentani K, Sekino Y, Mukai S, Teishima J, Matsubara A, Yasui W. Overexpression of the transmembrane protein BST-2 induces Akt and Erk phosphorylation in bladder cancer. Oncol Lett 2017; 14:999-1004. [PMID: 28693265 DOI: 10.3892/ol.2017.6230] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 03/07/2017] [Indexed: 11/05/2022] Open
Abstract
Bladder cancer, the majority of which is urothelial carcinoma (UC), is a common malignancy worldwide. Genes encoding transmembrane/secretory proteins expressed specifically in certain cancers may be ideal biomarkers for cancer diagnosis and may represent therapeutic targets. In the present study, the expression and function of the bone marrow stromal cell antigen 2 (BST2) gene was analyzed in UC. Reverse transcription-quantitative polymerase chain reaction demonstrated that expression of BST2 in normal tissue samples was the highest in liver tissue. However, expression of BST2 in UC tissue samples was higher than in normal liver. Immunohistochemical analysis revealed weak or no staining of BST-2 in non-neoplastic mucosa, whereas UC tissue exhibited stronger and more extensive staining compared with non-neoplastic mucosa. BST-2 staining was observed mainly on UC cell membranes. In total, 28 (41%) of 69 UC cases were positive for BST-2. UC cases positive for BST-2 were more frequently T2/3/4 cases [so-called muscle-invasive bladder cancer (MIBC)] than Ta/is/1 cases (P=0.0001). However, Kaplan-Meier analysis demonstrated no association between BST-2 expression and survival. BST2 small interfering RNA (siRNA)-transfected T24 cells exhibited significantly reduced cell growth relative to negative control siRNA-transfected T24 cells. The levels of phosphorylated Akt and extracellular signal-regulated kinase were lower in BST2 siRNA-transfected T24 cells than in control cells. These results suggest the involvement of BST-2 in the pathogenesis of UC. Since BST-2 is expressed on the cell membrane, BST-2 may be a good therapeutic target for MIBC.
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Affiliation(s)
- Yoshinori Shigematsu
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan.,Department of Urology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Naohide Oue
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Yuri Nishioka
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Naoya Sakamoto
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Kazuhiro Sentani
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Yohei Sekino
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan.,Department of Urology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Shoichiro Mukai
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Jun Teishima
- Department of Urology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Akio Matsubara
- Department of Urology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
| | - Wataru Yasui
- Department of Molecular Pathology, Hiroshima University Institute of Biomedical and Health Sciences, Hiroshima 734-8551, Japan
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85
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Shimoda Y, Tagaya Y, Saito T, Yamada E, Osaki A, Nakajima Y, Ozawa A, Satoh T, Okada J, Okada S, Yamada M. Continuous or Transient High Level of Glucose Exposure Differentially Increases Coronary Artery Endothelial Cell Proliferation and Human Colon Cancer Cell Proliferation. Cell J 2017; 19:106-112. [PMID: 28580314 PMCID: PMC5448324 DOI: 10.22074/cellj.2017.4446] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Accepted: 11/03/2016] [Indexed: 11/21/2022]
Abstract
We studied effect of high glucose levels on coronary artery endothelial cell proliferation
and human colon cancer cell proliferation. To examine the long-term effect of glucose
exposure on cell growth, cells were cultured for 14 days in the absence or presence of
183 mg/dL D-glucose addition in the culture medium. Short effect of elevated glucose
levels was examined by addition of 183 mg/dL D-glucose addition in the culture medium
for just one hour per day followed by changing the culture to standard medium (5.5 mM
D-glucose) during the next 23-hours period. Cell proliferation was estimated by 2,3-Bis
(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carbox-anilide (XTT) assay and
phosphor-Erk western blot analysis. We found that coronary artery endothelial cell proliferation
was significantly increased in the culture medium with the acute one-hour addition
of 183 mg/dL D-glucose compared to the absence or chronic presence of 183 mg/dL
D-glucose addition in the culture medium. In contrast, colon cancer cell proliferation was
significantly increased in the continuous presence of 183 mg/dL D-glucose addition in the
culture medium compared to the acute one-hour addition of glucose. The extent of Erk2
phosphorylation paralleled with the relative changes in cellular proliferation in both cell
types. Taken together, these results suggested that continuous or transient high level of
glucose exposure differentially effects coronary artery endothelial and human colon cancer cell proliferation.
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Affiliation(s)
- Yoko Shimoda
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Yuko Tagaya
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Tsugumichi Saito
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Eijiro Yamada
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Aya Osaki
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Yasuyo Nakajima
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Atsushi Ozawa
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Tetsurou Satoh
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Junichi Okada
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Shuichi Okada
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
| | - Masanobu Yamada
- Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Showa-machi, Maebashi, Gunma, Japan
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86
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Shin NR, Kim SH, Ko JW, Park SH, Lee IC, Ryu JM, Kim JC, Shin IS. HemoHIM, a herbal preparation, alleviates airway inflammation caused by cigarette smoke and lipopolysaccharide. Lab Anim Res 2017; 33:40-7. [PMID: 28400838 DOI: 10.5625/lar.2017.33.1.40] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 02/07/2017] [Accepted: 03/16/2017] [Indexed: 11/23/2022] Open
Abstract
HemoHIM, herbal preparation has designed for immune system recovery. We investigated the anti-inflammatory effect of HemoHIM on cigarette smoke (CS) and lipopolysaccharide (LPS) induced chronic obstructive pulmonary disease (COPD) mouse model. To induce COPD, C57BL/6 mice were exposed to CS for 1 h per day (eight cigarettes per day) for 4 weeks and intranasally received LPS on day 26. HemoHIM was administrated to mice at a dose of 50 or 100 mg/kg 1h before CS exposure. HemoHIM reduced the inflammatory cell count and levels of tumor necrosis factor receptor (TNF)-α, interleukin (IL)-6 and IL-1β in the broncho-alveolar lavage fluid (BALF) induced by CS+LPS exposure. HemoHIM decreased the inflammatory cell infiltration in the airway and inhibited the expression of iNOS and MMP-9 and phosphorylation of Erk in lung tissue exposed to CS+LPS. In summary, our results indicate that HemoHIM inhibited a reduction in the lung inflammatory response on CS and LPS induced lung inflammation via the Erk pathway. Therefore, we suggest that HemoHIM has the potential to treat pulmonary inflammatory disease such as COPD.
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87
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Gao XP, Qian DW, Xie Z, Hui H. Protective role of licochalcone B against ethanol-induced hepatotoxicity through regulation of Erk signaling. Iran J Basic Med Sci 2017; 20:131-137. [PMID: 28293388 PMCID: PMC5339652 DOI: 10.22038/ijbms.2017.8235] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Objective(s): Oxidative stress has been established as a key cause of alcohol-induced hepatotoxicity. Licochalcone B, an extract of licorice root, has shown antioxidative properties. This study was to investigate the effects and mechanisms of licochalcone B in ethanol-induced hepatic injury in an in vitro study. Materials and Methods: An in vitro model of Ethanol-induced cytotoxicity in BRL cells was used in this study. Cell injury was assessed using WST-1 assay and lactate dehydrogenase, alanine transaminase, and aspartate aminotransferase release assay. Cell apoptosis were quantified by flow cytometric analysis. The intracellular oxidative level was evaluated by reactive oxidative species, malondialdehyde and glutathione detection. Furthermore, the expression level of Erk, p-Erk, Nrf-2 were assessed using Western blot. Results: Treatment with ethanol induced marked cell injury and cell apoptosis in BRL cells. Licochalcone B significantly attenuated ethanol-induced cell injury, and inhibited cell apoptosis. Furthermore, licochalcone B significantly inhibited ethanol-induced intracellular oxidative level, upregulated the expression of p-Erk, and promoted nuclear localization of Nrf2. Additionally, this hepatoprotective role was significantly abolished by inhibition of Erk signaling. However, no apparent effects of Erk inhibition were observed on ethanol-induced hepatotoxicity. Conclusion: This study demonstrates that licochalcone B protects hepatocyte from alcohol-induced cell injury, and this hepatoprotective role might be attributable to apoptosis reduction, inhibition of oxidative stress, and upregulation of Erk–Nrf2. Therefore, licochalcone B might possess potential as a novel therapeutic drug candidate for alcohol-related liver disorders.
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Affiliation(s)
- Xiao-Peng Gao
- Department of General Surgery, Xi'an Central Hospital, The Affiliated Xi'an Central Hospital of Xi'an Jiaotong University College of Medicine, Xi'an 710003, P.R. China
| | - Dong-Wei Qian
- Department of Operation Room, Xi'an Central Hospital, The affiliated Xi'an central hospital of Xi'an Jiaotong university College of Medicine, Xi'an 710003, P.R. China
| | - Zhen Xie
- Department Two of Neurology, Shaanxi Provincial People's Hospital, Xi'an, China
| | - Hao Hui
- Department Two of Neurology, Shaanxi Provincial People's Hospital, Xi'an, China
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88
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Kim S, Williams DW, Lee C, Kim T, Arai A, Shi S, Li X, Shin KH, Kang MK, Park NH, Kim RH. IL-36 Induces Bisphosphonate-Related Osteonecrosis of the Jaw-Like Lesions in Mice by Inhibiting TGF-β-Mediated Collagen Expression. J Bone Miner Res 2017; 32:309-318. [PMID: 27567012 PMCID: PMC5642919 DOI: 10.1002/jbmr.2985] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 08/17/2016] [Accepted: 08/25/2016] [Indexed: 01/30/2023]
Abstract
Long-term administration of nitrogen-containing bisphosphonates can induce detrimental side effects such as bisphosphonate-related osteonecrosis of the jaw (BRONJ) in human. Although inflammation is known to be associated with BRONJ development, the detailed underlying mechanism remains unknown. Here, we report that the pro-inflammatory cytokine IL-36α is, in part, responsible for the BRONJ development. We found a notably higher level of IL-36α and lower level of collagen in the BRONJ lesions in mice. We also found that IL-36α remarkably suppressed TGF-β-mediated expression of Collα1 and α-Sma via the activation of Erk signaling pathway in mouse gingival mesenchymal stem cells. When IL-36 signaling was abrogated in vivo, development of BRONJ lesions was ameliorated in mice. Taken together, we showed the pathologic role of IL-36α in BRONJ development by inhibiting collagen expression and demonstrated that IL-36α could be a potential marker and a therapeutic target for the prevention and treatment of BRONJ. © 2016 American Society for Bone and Mineral Research.
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Affiliation(s)
- Sol Kim
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Drake W Williams
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Cindy Lee
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Terresa Kim
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Atsushi Arai
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
| | - Songtao Shi
- Department of Anatomy and Cell Biology, University of Pennsylvania, School of Medicine, Philadelphia, PA, USA
| | - Xinmin Li
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
| | - Ki-Hyuk Shin
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
- UCLA Jonsson Comprehensive Cancer Center, Los Angeles, CA, USA
| | - Mo K Kang
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
- UCLA Jonsson Comprehensive Cancer Center, Los Angeles, CA, USA
| | - No-Hee Park
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
- Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
- UCLA Jonsson Comprehensive Cancer Center, Los Angeles, CA, USA
| | - Reuben H Kim
- The Shapiro Family Laboratory of Viral Oncology and Aging Research, UCLA School of Dentistry, Los Angeles, CA, USA
- UCLA Jonsson Comprehensive Cancer Center, Los Angeles, CA, USA
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89
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Xiang S, Wang N, Hui P, Ma J. Gab3 is required for human colorectal cancer cell proliferation. Biochem Biophys Res Commun 2017; 484:719-25. [PMID: 28115166 DOI: 10.1016/j.bbrc.2017.01.095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Accepted: 01/19/2017] [Indexed: 11/21/2022]
Abstract
Here, we focused on the potential function of Gab3, an uncommon Gab family protein, in human colorectal cancer (CRC) cells. We found that Gab3 was only expressed in human colon cancer tissues as well as in established (HCT-116 and HT-29 lines) and primary human CRC cells. It was however absent in normal human colon cancer tissues and in FHC colon epithelial cells. Knockdown of Gab3 by targeted-shRNAs inhibited proliferation of the CRC cells. Reversely, exogenous over-expression of Gab3 promoted CRC cell proliferation. At the signaling level, Gab3 co-precipitated with p85 and SHP2 in CRC cells, which was required for subsequent Akt and Erk activation. Gab3 shRNA knockdown inhibited Akt and Erk activation, yet Gab3 over-expression augmented it. In vivo, HCT-116 xenograft tumor growth in severe combined immune deficient (SCID) mice was suppressed following expressing Gab3 shRNAs. Meanwhile, Akt and Erk activation in Gab3 shRNA-expressing tumors was also largely inhibited. Together, our results suggest that Gab3 expression in CRC cells is important for Akt-Erk activation and cell proliferation.
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90
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López C, Zamorano P, Teuber S, Salas M, Otth C, Hidalgo MA, Concha I, Zambrano A. Interleukin-3 Prevents Cellular Death Induced by Oxidative Stress in HEK293 Cells. J Cell Biochem 2017; 118:1330-1340. [PMID: 27862234 DOI: 10.1002/jcb.25790] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 11/08/2016] [Indexed: 11/07/2022]
Abstract
Interleukin-3 (IL-3) is a well-characterized growth factor in hematopoietic cells, but it is also expressed in other cell types with poorly described functions. Many studies have provided evidence that IL-3 plays an important role in cell survival. We have previously shown that IL-3 is able to increase glucose uptake in HEK293 cells, suggesting that this factor requires sustained glucose metabolism to promote cell survival. In this study, we demonstrate that IL-3 contributes to cell survival under oxidative stress, a prominent feature in the pathophysiology of cancer, diabetes, and neurodegenerative diseases, as well as in the aging process. Our results suggest a molecular mechanism that involves signaling pathways mediated by PI-3k/Akt and Erk. Altogether, these findings show an important role for IL-3 in supporting the viability of non-hematopoietic systems. J. Cell. Biochem. 118: 1330-1340, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Camila López
- Facultad de Ciencias, Instituto de Bioquímica y Microbiología, Valdivia, Chile
| | - Patricia Zamorano
- Facultad de Ciencias, Instituto de Bioquímica y Microbiología, Valdivia, Chile
| | - Stefanie Teuber
- Facultad de Ciencias, Instituto de Bioquímica y Microbiología, Valdivia, Chile
| | - Mónica Salas
- Facultad de Ciencias, Instituto de Bioquímica y Microbiología, Valdivia, Chile
| | - Carola Otth
- Facultad de Medicina, Instituto de Microbiología Clínica, Valdivia, Los Ríos, Chile.,Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia, Chile
| | - María A Hidalgo
- Facultad de Ciencias Veterinarias, Instituto de Farmacología, Universidad Austral de Chile, Valdivia, Los Ríos, Chile
| | - Ilona Concha
- Facultad de Ciencias, Instituto de Bioquímica y Microbiología, Valdivia, Chile
| | - Angara Zambrano
- Facultad de Ciencias, Instituto de Bioquímica y Microbiología, Valdivia, Chile.,Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia, Chile
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91
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Abstract
The Ras/Erk signaling pathway plays a central role in diverse cellular processes ranging from development to immune cell activation to neural plasticity to cancer. In recent years, this pathway has been widely studied using live-cell fluorescent biosensors, revealing complex Erk dynamics that arise in many cellular contexts. Yet despite these high-resolution tools for measurement, the field has lacked analogous tools for control over Ras/Erk signaling in live cells. Here, we provide detailed methods for one such tool based on the optical control of Ras activity, which we call "Opto-SOS." Expression of the Opto-SOS constructs can be coupled with a live-cell reporter of Erk activity to reveal highly quantitative input-to-output maps of the pathway. Detailed herein are protocols for expressing the Opto-SOS system in cultured cells, purifying the small molecule cofactor necessary for optical stimulation, imaging Erk responses using live-cell microscopy, and processing the imaging data to quantify Ras/Erk signaling dynamics.
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Affiliation(s)
- Alexander G Goglia
- Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory Room 140, Washington Road, Princeton, NJ, 08544, USA
- Robert Wood Johnson Medical School, Rutgers University, New Brunswick, NJ, USA
| | - Maxwell Z Wilson
- Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory Room 140, Washington Road, Princeton, NJ, 08544, USA
| | - Daniel B DiGiorno
- Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory Room 140, Washington Road, Princeton, NJ, 08544, USA
| | - Jared E Toettcher
- Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory Room 140, Washington Road, Princeton, NJ, 08544, USA.
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92
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Deng HT, Liu HL, Zhai BB, Zhang K, Xu GC, Peng XM, Zhang QZ, Li LY. Vascular endothelial growth factor suppresses TNFSF15 production in endothelial cells by stimulating miR-31 and miR-20a expression via activation of Akt and Erk signals. FEBS Open Bio 2016; 7:108-117. [PMID: 28097093 PMCID: PMC5221472 DOI: 10.1002/2211-5463.12171] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 11/18/2016] [Accepted: 11/26/2016] [Indexed: 02/05/2023] Open
Abstract
Tumor necrosis factor superfamily‐15 (TNFSF15; VEGI; TL1A) is a negative modulator of angiogenesis for blood vessel homeostasis and is produced by endothelial cells in a mature vasculature. It is known to be downregulated by vascular endothelial growth factor (VEGF), a major regulator of neovascularization but the mechanism of this interaction is unclear. Here we report that VEGF is able to stimulate the production of two microRNAs, miR‐20a and miR‐31, which directly target the 3′‐UTR of TNFSF15. Additionally, we show that two VEGF‐stimulated cell growth signals, Erk and Akt, are responsible for promoting the expression of miR‐20a and miR‐31. Treatment of human umbilical vein endothelial cells (HUVECs) with Akt inhibitor LY294002 results in diminished miR‐20a and miR‐31 production, while Erk inhibitor U0126 prevented VEGF‐stimulated expression of miR‐20a but not that of miR‐31. Furthermore, inactivation of either Erk or Akt signals restores TNFSF15 gene expression. In an angiogenesis assay, elevated miR‐20a or miR‐31 levels in HUVECs leads to enhancement of capillary‐like tubule formation in vitro, whereas lowered miR‐20a and miR‐31 levels results in an inhibition. These findings are consistent with the view that miR‐20a and miR‐31 mediate VEGF‐induced downregulation of TNFSF15. Targeting these microRNA molecules may therefore provide an effective approach to inhibit angiogenesis.
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Affiliation(s)
- Hui-Ting Deng
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
| | - Hai-Lin Liu
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
| | - Bei-Bei Zhai
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
| | - Kun Zhang
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
| | - Guo-Ce Xu
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
| | - Xue-Mei Peng
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
| | - Qiang-Zhe Zhang
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
| | - Lu-Yuan Li
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research Nankai University China; Collaborative Innovation Center for Biotherapy Nankai University West China Hospital Sichuan University Chengdu China
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93
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Mathew G, Hannan A, Hertzler-Schaefer K, Wang F, Feng GS, Zhong J, Zhao JJ, Downward J, Zhang X. Targeting of Ras-mediated FGF signaling suppresses Pten-deficient skin tumor. Proc Natl Acad Sci U S A 2016; 113:13156-13161. [PMID: 27799550 PMCID: PMC5135310 DOI: 10.1073/pnas.1604450113] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Deficiency in PTEN (phosphatase and tensin homolog deleted on chromosome 10) is the underlying cause of PTEN hamartoma tumor syndrome and a wide variety of human cancers. In skin epidermis, we have previously identified an autocrine FGF signaling induced by loss of Pten in keratinocytes. In this study, we demonstrate that skin hyperplasia requires FGF receptor adaptor protein Frs2α and tyrosine phosphatase Shp2, two upstream regulators of Ras signaling. Although the PI3-kinase regulatory subunits p85α and p85β are dispensable, the PI3-kinase catalytic subunit p110α requires interaction with Ras to promote hyperplasia in Pten-deficient skin, thus demonstrating an important cross-talk between Ras and PI3K pathways. Furthermore, genetic and pharmacological inhibition of Ras-MAPK pathway impeded epidermal hyperplasia in Pten animals. These results reveal a positive feedback loop connecting Pten and Ras pathways and suggest that FGF-activated Ras-MAPK pathway is an effective therapeutic target for preventing skin tumor induced by aberrant Pten signaling.
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Affiliation(s)
- Grinu Mathew
- Department of Ophthalmology, Columbia University, New York, NY 10032
- Department of Pathology and Cell Biology, Columbia University, New York, NY 10032
| | - Abdul Hannan
- Department of Ophthalmology, Columbia University, New York, NY 10032
- Department of Pathology and Cell Biology, Columbia University, New York, NY 10032
| | | | - Fen Wang
- Center for Cancer Biology and Nutrition, Institute of Biosciences and Technology, Texas A&M, Houston, TX 77030
| | - Gen-Sheng Feng
- Department of Pathology, School of Medicine, University of California, San Diego, La Jolla, CA 92093
- Section of Molecular Biology, Division of Biological Sciences, University of California, San Diego, La Jolla, CA 92093
| | - Jian Zhong
- Burke Medical Research Institute, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, White Plains, NY 10605
| | - Jean J Zhao
- Department of Cancer Biology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115
- Department of Biochemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115
| | - Julian Downward
- Oncogene Biology Laboratory, The Francis Crick Institute, London WC2A 3LY, United Kingdom
| | - Xin Zhang
- Department of Ophthalmology, Columbia University, New York, NY 10032;
- Department of Pathology and Cell Biology, Columbia University, New York, NY 10032
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94
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Yasuda K, Ushio H. Keyhole limpet hemocyanin induces innate immunity via Syk and Erk phosphorylation. EXCLI J 2016; 15:474-481. [PMID: 27822175 PMCID: PMC5083961 DOI: 10.17179/excli2016-488] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Accepted: 07/11/2016] [Indexed: 01/01/2023]
Abstract
Hemocyanin is an extracellular respiratory protein containing copper in hemolymph of invertebrates, such as Mollusk and Arthropod. Keyhole limpet hemocyanin (KLH) is one of hemocyanins and has many years of experience for vaccine developments and immunological studies in mammals including human. However, the association between KLH and the immune systems, especially the innate immune systems, remains poorly understood. The aim of this study is to clarify the direct effects of KLH on the innate immune systems. KLH activated an inflammation-related transcription factor NF-κB as much as lipopolysaccharide (LPS) in a human monocytic leukemia THP-1 reporter cell line. We have found that the KLH-induced NF-κB activation is partially involved in a spleen tyrosine kinase (Syk) pathway. We have also successfully revealed that an extracellular signal-regulated kinase (Erk), a member of mitogen-activated protein kinases, is located in an upstream of NF-κB activation induced by KLH. Furthermore, a Syk phosphorylation inhibitor partially suppressed the Erk activation in KLH-stimulated THP-1. These results suggest that both Syk and Erk associate with the KLH-induced NF-κB activation in the human monocyte.
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Affiliation(s)
- Kyoko Yasuda
- Laboratory of Marine Biochemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
| | - Hideki Ushio
- Laboratory of Marine Biochemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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95
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Chen J, Chen J, Wang X, Wang C, Cao W, Zhao Y, Zhang B, Cui M, Shi Q, Zhang G. Ligustrazine alleviates acute pancreatitis by accelerating acinar cell apoptosis at early phase via the suppression of p38 and Erk MAPK pathways. Biomed Pharmacother 2016; 82:1-7. [PMID: 27470331 DOI: 10.1016/j.biopha.2016.04.048] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 04/23/2016] [Accepted: 04/25/2016] [Indexed: 12/16/2022] Open
Abstract
OBJECTIVE This study aimed to investigate the role of ligustrazine on apoptosis and inflammatory reaction in acute pancreatitis. METHODS Rats and acinar cells were treated with caerulein to induce acute pancreatitis models. Cell models were treated with saline, p38 inhibitor, Erk inhibitor and ligustrazine. Then, the levels of TNF-α, IL-1β and IL-6 were determined by ELISA assay, the protein levels of p38, Erk1/2, p53 and cleaved caspase3 were determined by western blotting, and apoptosis were measured by flow cytometry. Rat models were treated with saline and ligustrazine. Plasma amylase and pancreatic myeloperoxidase activity and the levels of TNF-α, IL-1β and IL-6 in rats were determined. The protein levels of p38, Erk1/2, p53 and cleaved caspase3 in pancreas tissues were determined by western blotting, and pancreas tissues were also performed TUNEL staining to observe apoptosis status. RESULTS Ligustrazine downregulated the levels of TNF-α, IL-1β, IL-6. The protein levels of p38 and Erk were reduced by p38 inhibitor, Erk inhibitor and ligustrazine, while the levels of p53 and cleaved caspase 3 were upregulated. Apoptosis of AP acinar cells and cells in AP rat models was promoted after treated with ligustrazine. Plasma amylase and pancreatic myeloperoxidase activity in AP rat models were reduced by ligustrazine. CONCLUSION Ligustrazine alleviates acute pancreatitis by accelerating acinar cell apoptosis at early phase via the suppression on p38 and Erk MAPK pathways. It is capable of attenuating the severity of acute pancreatitis and may have a therapeutic effect on patients with acute pancreatitis.
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Affiliation(s)
- Jianli Chen
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Junmao Chen
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Xiaotao Wang
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Changyou Wang
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Wenbin Cao
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Yongkui Zhao
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Bo Zhang
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Mingxin Cui
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Qiuyan Shi
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China
| | - Guozhi Zhang
- North China University of Science and Technology Affiliated Hospital, Tangshan 063000, Hebei, China.
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96
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Liu C, Chen H, Liu L, Chen L. RNA sequencing analysis to demonstrate Erk dependent and independent functions of Mek. Genom Data 2016; 7:73-5. [PMID: 26981366 PMCID: PMC4778636 DOI: 10.1016/j.gdata.2015.11.029] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 11/30/2015] [Indexed: 11/21/2022]
Abstract
Mek inhibition and Erk knockout (KO) have quite distinct effects on pluripotency maintenance in mouse embryonic stem cells (ESCs). To test whether there is an Erk-independent function of Mek, RNA-sequencing (RNA-seq) is carried out on six samples, WT KH2 ESCs treated with or without PD0325901 (PD) for 48 h (KH2_PD and KH2, respectively), iErk1; Erk KO ESCs cultured in the presence of Dox (P0), 48 and 96 h after Dox withdrawal (P1 and P2, respectively), and iErk1; Erk KO ESCs cultured without Dox for 96 h, and treated with PD in the last 48 h (P2_PD). These RNA-seq data demonstrate that Mek inhibition has quite different effect on the transcriptional profile of mouse ESCs, compared to Erk KO. Moreover, a significant fraction of genes is regulated by Mek inhibition, regardless of the presence or absence of Erk, indicating an Erk-independent function of Mek. RNA-seq data are deposited in Gene Expression Omnibus (GEO) datasets under accession number GSE70304.
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Affiliation(s)
- Chang Liu
- State Key Laboratory of Medicinal Chemical Biology, Collaborative Innovation Center for Biotherapy, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Protein Sciences and College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Haixia Chen
- State Key Laboratory of Medicinal Chemical Biology, Collaborative Innovation Center for Biotherapy, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Protein Sciences and College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Lin Liu
- State Key Laboratory of Medicinal Chemical Biology, Collaborative Innovation Center for Biotherapy, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Protein Sciences and College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Lingyi Chen
- State Key Laboratory of Medicinal Chemical Biology, Collaborative Innovation Center for Biotherapy, 2011 Collaborative Innovation Center of Tianjin for Medical Epigenetics, Tianjin Key Laboratory of Protein Sciences and College of Life Sciences, Nankai University, Tianjin 300071, China
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Geng W, Wei R, Liu S, Tang L, Zhu H, Chen P, Wu J, Zhang X, Zhu F, Yin Z, Chen X. Shenhua Tablet inhibits mesangial cell proliferation in rats with chronic anti-Thy-1 nephritis. Biol Res 2016; 49:17. [PMID: 26969153 PMCID: PMC4788853 DOI: 10.1186/s40659-016-0078-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 03/02/2016] [Indexed: 01/19/2023] Open
Abstract
Background In China, mesangial proliferative glomerulonephritis (MsPGN) is one of the most common kidney diseases. In this study, we treated a rat model of chronic anti-Thy-1 MsPGN with Shenhua Tablet and evaluated whether the tablet was able to protect the kidney function. Thirty-six Wistar rats were randomly divided into six groups: (1) Sham surgery (Sham); (2) anti-Thy-1 nephritis model (Thy-1); (3) anti-Thy-1 nephritis model + irbesartan-treated (Irb); (4) anti-Thy-1 nephritis model + low-dose of Shenhua Tablet (SHL); (5) anti-Thy-1 nephritis model + medium-dose of Shenhua Tablet (SHM); (6) anti-Thy-1 nephritis model + high-dose of Shenhua Tablet (SHH). Results Thirteen weeks after drug treatment, urinary proteins were quantified and renal pathological changes were thoroughly examined at the time point of 24 h. Meanwhile, the expression levels of p-Erk1/2, cyclin D1 and p21 at the renal cortex were also tested. The levels of urinary proteins and total cholesterol in the blood were significantly reduced in rats treated with any drug tested in this study. The level of triglyceride was significantly reduced in all three Shenhua Tablet-treated groups. Renal pathomorphological scores were significantly improved in groups of Irb, SHM and SHH. Mesangial cell proliferation was significantly inhibited in any drug-treated group. p-Erk1/2 and cyclin D1 were downregulated whereas p21 was upregulated in the renal cortex. Conclusions Our study indicated that Shenhua Tablet is able to inhibit the abnormal proliferation of mesangial cells and to prevent kidney damage, which is likely associated with downregulation of p-Erk1/2 and reduced activity of its downstream target-cyclin D1.
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Affiliation(s)
- Wenjia Geng
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China.,Department of Nephrology, Guangdong Provincial Hospital of Chinese Medicine, Guangzhou, 510120, People's Republic of China
| | - Ribao Wei
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Shuwen Liu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Li Tang
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Hanyu Zhu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Pu Chen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Jie Wu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Xueguang Zhang
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Fei Zhu
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Zhong Yin
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China
| | - Xiangmei Chen
- Department of Nephrology, Chinese PLA General Hospital, Chinese PLA Institute of Nephrology, State Key Laboratory of Kidney Diseases, National Clinical Research Center for Kidney Diseases, Beijing Key Laboratory of Kidney Disease Research, Beijing, 100853, People's Republic of China.
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Hui H, Rao W, Zhang L, Xie Z, Peng C, Su N, Wang K, Wang L, Luo P, Hao YL, Zhang S, Fei Z. Inhibition of Na(+)-K(+)-2Cl(-) Cotransporter-1 attenuates traumatic brain injury-induced neuronal apoptosis via regulation of Erk signaling. Neurochem Int 2016; 94:23-31. [PMID: 26854573 DOI: 10.1016/j.neuint.2016.02.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 01/26/2016] [Accepted: 02/03/2016] [Indexed: 11/28/2022]
Abstract
Traumatic brain injury (TBI) is the leading cause of mortality and morbidity worldwide and is characterized by immediate brain damage and secondary injuries, such as brain edema and ischemia. However, the exact pathological mechanisms that comprise these associated secondary injuries have not been fully elucidated. This study aimed to investigate the role of the Na(+)-K(+)-2Cl(-) cotransporter-1 (NKCC1) in the disruption of ion homeostasis and neuronal apoptosis in TBI. Using a traumatic neuron injury (TNI) model in vitro and a controlled cortex injury (CCI) model in vivo, the present study investigated changes in the expression and effects of NKCC1 in TBI using western blot, RNA interference, a lactate dehydrogenase (LDH) release assay, TdT-mediated dUTP Nick end-labeling (TUNEL) analysis, sodium imaging, brain water content, and neurological severity scoring. TBI induced the expression of NKCC1 to be significantly upregulated in the cortex, both in vitro and in vivo. Pharmacological inhibitor bumetanide (Bume) or NKCC1 RNA interference significantly attenuated TBI-induced intracellular Na(+) increase, inhibited neuronal apoptosis, and improved brain edema and neurological function. Furthermore, NKCC1 inhibition also significantly inhibited TBI-induced extracellular signal-regulated kinase (Erk) activation. Erk inhibition significantly protected neurons from TBI injury; however, Erk inhibition had no effect on NKCC1 expression or the neuroprotective effect of NKCC1 inhibition against TBI. This study demonstrates the role of NKCC1 in TBI-induced brain cortex injury, establishing that NKCC1 may play a neurotoxic role in TBI and that the inhibition of NKCC1 may protect neurons from TBI via the regulation of Erk signaling.
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Affiliation(s)
- Hao Hui
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Wei Rao
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Lei Zhang
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Zhen Xie
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Cheng Peng
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Ning Su
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Kai Wang
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Li Wang
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Peng Luo
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Ye-lu Hao
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China
| | - Sai Zhang
- Department of Neurosurgery, Affiliated Hospital of Logistics, University of Chinese Armed Police Forces, Chenglin Road, Tianjin 300162, PR China.
| | - Zhou Fei
- Department of Neurosurgery, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, PR China.
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Doldo E, Costanza G, Ferlosio A, Pompeo E, Agostinelli S, Bellezza G, Mazzaglia D, Giunta A, Sidoni A, Orlandi A. High expression of cellular retinol binding protein-1 in lung adenocarcinoma is associated with poor prognosis. Genes Cancer 2016; 6:490-502. [PMID: 26807202 PMCID: PMC4701228 DOI: 10.18632/genesandcancer.89] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Purpose Adenocarcinoma, the most common non-small cell lung cancer is a leading cause of death worldwide, with a low overall survival (OS) despite increasing attempts to achieve an early diagnosis and accomplish surgical and multimodality treatment strategies. Cellular retinol binding protein-1 (CRBP-1) regulates retinol bioavailability and cell differentiation, but its role in lung cancerogenesis remains uncertain. Experimental design CRBP-1 expression, clinical outcome and other prognostic factors were investigated in 167 lung adenocarcinoma patients. CRBP-1 expression was evaluated by immunohistochemistry of tissue microarray sections, gene copy number analysis and tumor methylation specific PCR. Effects of CRBP-1 expression on proliferation/apoptosis gene array, protein and transcripts were investigated in transfected A549 lung adenocarcinoma cells. Results CRBP-1High expression was observed in 62.3% of adenocarcinomas and correlated with increased tumor grade and reduced OS as an independent prognostic factor. CRBP-1 gene copy gain also associated with tumor CRBP-1High status and dedifferentiation. CRBP-1-transfected (CRBP-1+) A549 grew more than CRBP-1− A549 cells. At >1μM concentrations, all trans-retinoic acid and retinol reduced viability more in CRBP-1+ than in CRBP-1− A549 cells. CRBP-1+ A549 cells showed up-regulated RARα/ RXRα and proliferative and transcriptional genes including pAkt, pEGFR, pErk1/2, creb1 and c-jun, whereas RARβ and p53 were strongly down-regulated; pAkt/pErk/ pEGFR inhibitors counteracted proliferative advantage and increased RARα/RXRα, c-jun and CD44 expression in CRBP-1+ A549 cells. Conclusion CRBP-1High expression in lung adenocarcinoma correlated with increased tumor grade and reduced OS, likely through increased Akt/Erk/EGFR-mediated cell proliferation and differentiation. CRBP-1High expression can be considered an additional marker of poor prognosis in lung adenocarcinoma patients.
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Affiliation(s)
- Elena Doldo
- Anatomic Pathology, Department of Biomedicine and Prevention, Tor Vergata University of Rome, Italy
| | - Gaetana Costanza
- Anatomic Pathology, Department of Biomedicine and Prevention, Tor Vergata University of Rome, Italy
| | - Amedeo Ferlosio
- Anatomic Pathology, Department of Biomedicine and Prevention, Tor Vergata University of Rome, Italy
| | | | - Sara Agostinelli
- Anatomic Pathology, Department of Biomedicine and Prevention, Tor Vergata University of Rome, Italy
| | - Guido Bellezza
- Department of Experimental Medicine, Section of Anatomic Pathology and Histology, Medical School, University of Perugia, Italy
| | - Donatella Mazzaglia
- Anatomic Pathology, Department of Biomedicine and Prevention, Tor Vergata University of Rome, Italy
| | - Alessandro Giunta
- Anatomic Pathology, Department of Biomedicine and Prevention, Tor Vergata University of Rome, Italy
| | - Angelo Sidoni
- Department of Experimental Medicine, Section of Anatomic Pathology and Histology, Medical School, University of Perugia, Italy
| | - Augusto Orlandi
- Anatomic Pathology, Department of Biomedicine and Prevention, Tor Vergata University of Rome, Italy; Department of Anatomic Pathology, Tor Vergata Policlinic of Rome, Italy
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Matsunaga R, Nishino T, Yokoyama A, Nakashima A, Kikkawa U, Konishi H. Versatile function of the circadian protein CIPC as a regulator of Erk activation. Biochem Biophys Res Commun 2016; 469:377-83. [PMID: 26657846 DOI: 10.1016/j.bbrc.2015.11.117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2015] [Accepted: 11/25/2015] [Indexed: 11/24/2022]
Abstract
The CLOCK-interacting protein, Circadian (CIPC), has been identified as an additional negative-feedback regulator of the circadian clock. However, recent study on CIPC knockout mice has shown that CIPC is not critically required for basic circadian clock function, suggesting other unknown biological roles for CIPC. In this study, we focused on the cell cycle dependent nuclear-cytoplasmic shuttling function of CIPC and on identifying its binding proteins. Lys186 and 187 were identified as the essential amino acid residues within the nuclear localization signal (NLS) of CIPC. We identified CIPC-binding proteins such as the multifunctional enzyme CAD protein (carbamoyl-phosphate synthetase 2, aspartate transcarbamoylase, and dihydroorotase), which is a key enzyme for de novo pyrimidine synthesis. Compared to control cells, HEK293 cells overexpressing wild-type CIPC showed suppressed cell proliferation and retardation of cell cycle. We also found that PMA-induced Erk activation was inhibited with expression of wild-type CIPC. In contrast, the NLS mutant of CIPC, which reduced the ability of CIPC to translocate into the nucleus, did not exhibit these biological effects. Since CAD and Erk have significant roles in cell proliferation and cell cycle, CIPC may work as a cell cycle regulator by interacting with these binding proteins.
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Affiliation(s)
- Ryota Matsunaga
- Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima 727-0023, Japan
| | - Tasuku Nishino
- Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima 727-0023, Japan
| | - Atsushi Yokoyama
- Department of Molecular Endocrinology, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Akio Nakashima
- Biosignal Research Center, Kobe University, Kobe 657-8501, Japan
| | - Ushio Kikkawa
- Biosignal Research Center, Kobe University, Kobe 657-8501, Japan
| | - Hiroaki Konishi
- Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima 727-0023, Japan.
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