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https://www.readbyqxmd.com/read/28820778/src-kinase-inhibition-attenuates-morphine-tolerance-without-affecting-reinforcement-or-psychomotor-stimulation
#1
Fiona A Bull, Daniel T Baptista-Hon, Claire Sneddon, Lisa Wright, Wendy Walwyn, Tim G Hales
BACKGROUND: Prolonged opioid administration leads to tolerance characterized by reduced analgesic potency. Pain management is additionally compromised by the hedonic effects of opioids, the cause of their misuse. The multifunctional protein β-arrestin2 regulates the hedonic effects of morphine and participates in tolerance. These actions might reflect µ opioid receptor up-regulation through reduced endocytosis. β-Arrestin2 also recruits kinases to µ receptors. We explored the role of Src kinase in morphine analgesic tolerance, locomotor stimulation, and reinforcement in C57BL/6 mice...
August 18, 2017: Anesthesiology
https://www.readbyqxmd.com/read/28820056/involvement-of-cd24-in-multiple-cancer-related-pathways-makes-it-an-interesting-new-target-for-cancer-therapy
#2
Shirin Eyvazi, Bahram Kazemi, Siavoush Dastmalchi, Mojgan Bandehpour
CD24 (cluster of differentiation 24) is a small heavy glycosylated protein, which is overexpressed in many cancer and some cancer stem cells and is associated with the development, invasion, and metastasis of cancer cells. The exact role of CD24 in these processes is not fully understood, however, in this article, it has been tried to present collection of cancer-related mechanisms attributed to CD24. Based on the literature, CD24 dis-regulates different signaling pathways in various cancer cells, including; Src kinases, STAT3, EGFR, Wnt/β-catenin and MAPK...
August 18, 2017: Current Cancer Drug Targets
https://www.readbyqxmd.com/read/28819393/phosphoglycerate-mutase-1-predicts-the-poor-prognosis-of-oral-squamous-cell-carcinoma-and-is-associated-with-cell-migration
#3
Dadong Zhang, Heming Wu, Xiaomin Zhang, Xu Ding, Min Huang, Meiyu Geng, Hongwei Li, Zuoquan Xie
Oral squamous cell carcinoma (OSCC) is a common malignant tumor with high metastatic potential. However, no good biomarker has been identified to refine which subtype is of high metastatic potential to make decisions regarding the elective and therapeutic management of lymphatic metastases. In this study, we investigated the role of the metabolic enzyme phosphoglycerate mutase 1 (PGAM1) in OSCC. PGAM1 expression was examined in tissue samples of 122 OSCC patients using immunohistochemistry, and the correlation between clinicopathological expression and PGAM1 expression was determined...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28818835/src-dependent-phosphorylation-of-%C3%AE-opioid-receptor-at-tyr-336-modulates-opiate-withdrawal
#4
Lei Zhang, Cherkaouia Kibaly, Yu-Jun Wang, Chi Xu, Kyu Young Song, Patrick W McGarrah, Horace H Loh, Jing-Gen Liu, Ping-Yee Law
Opiate withdrawal/negative reinforcement has been implicated as one of the mechanisms for the progression from impulsive to compulsive drug use. Increase in the intracellular cAMP level and protein kinase A (PKA) activities within the neurocircuitry of addiction has been a leading hypothesis for opiate addiction. This increase requires the phosphorylation of μ-opioid receptor (MOR) at Tyr(336) by Src after prolonged opiate treatment in vitro Here, we report that the Src-mediated MOR phosphorylation at Tyr(336) is a prerequisite for opiate withdrawal in mice...
August 17, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28818394/focal-adhesion-kinase-family-is-involved-in-matrix-contraction-by-transdifferentiated-m%C3%A3-ller-cells
#5
Rintaro Tsukahara, Kazuhiko Umazume, Kevin McDonald, Henry J Kaplan, Shigeo Tamiya
Transdifferentiated Müller cells that adopt a fibroblastic/myofibroblastic phenotype have been identified in epiretinal membranes (ERMs) in several ocular disorders, and have been implicated to play a role in the formation and/or the contraction of ERMs. We have previously demonstrated that dasatinib, a dual inhibitor of Src-family kinases and Abl kinase, can prevent matrix contraction by transdifferentiated Müller cells. In this study, we examined molecules involved in matrix contraction downstream of primary dasatinib targets...
August 14, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28817661/ouabain-affects-cell-migration-via-na-k-atpase-p130cas-and-via-nucleus-centrosome-association
#6
Young Ou, Chen Xuan Pan, Jeremy Zuo, Frans A van der Hoorn
Na,K-ATPase is a membrane protein that catalyzes ATP to maintain transmembrane sodium and potassium gradients. In addition, Na,K-ATPase also acts as a signal-transducing receptor for cardiotonic steroids such as ouabain and activates a number of signalling pathways. Several studies report that ouabain affects cell migration. Here we used ouabain at concentrations far below those required to block Na,K-ATPase pump activity and show that it significantly reduced RPE cell migration through two mechanisms. It causes dephosphorylation of a 130 kD protein, which we identify as p130cas...
2017: PloS One
https://www.readbyqxmd.com/read/28815598/lpa1-is-a-key-mediator-of-intracellular-signalling-and-neuroprotection-triggered-by-tetracyclic-antidepressants-in-hippocampal-neurons
#7
Maria C Olianas, Simona Dedoni, Pierluigi Onali
Both lysophosphatidic acid (LPA) and antidepressants have been shown to affect neuronal survival and differentiation, but whether LPA signalling participates in the action of antidepressants is still unknown. In the present study we examined the role of LPA receptors in the regulation of ERK1/2 activity and neuronal survival by the tetracyclic antidepressants mianserin and mirtazapine in hippocampal neurons. In HT22 immortalized hippocampal cells antidepressants and LPA induced a time- and concentration-dependent stimulation of ERK1/2 phosphorylation...
August 16, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/28811476/lyn-and-fyn-function-as-molecular-switches-that-control-immunoreceptors-to-direct-homeostasis-or-inflammation
#8
Sanae Ben Mkaddem, Amaya Murua, Héloise Flament, Dimitri Titeca-Beauport, Carine Bounaix, Luca Danelli, Pierre Launay, Marc Benhamou, Ulrich Blank, Eric Daugas, Nicolas Charles, Renato C Monteiro
Immunoreceptors can transduce either inhibitory or activatory signals depending on ligand avidity and phosphorylation status, which is modulated by the protein kinases Lyn and Fyn. Here we show that Lyn and Fyn control immune receptor signaling status. SHP-1 tyrosine 536 phosphorylation by Lyn activates the phosphatase promoting inhibitory signaling through the immunoreceptor. By contrast, Fyn-dependent phosphorylation of SHP-1 serine 591 inactivates the phosphatase, enabling activatory immunoreceptor signaling...
August 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28810597/dual-inhibition-of-met-and-src-kinase-activity-as-a-combined-targeting-strategy-for-colon-cancer
#9
Na Song, Xiujuan Qu, Shizhou Liu, Simeng Zhang, Jing Liu, Jinglei Qu, Huachuan Zheng, Yunpeng Liu, Xiaofang Che
Hepatocyte growth factor (HGF)/MET signaling is implicated in the development of colorectal cancer (CRC) and possesses therapeutic value for various types of cancer. However, inhibition of MET alone has been demonstrated to have limited efficacy. The present study examined the combined inhibition of MET and SRC kinase activity in colon cancer cells. Furthermore, the role of the HGF/MET pathway in ligand-dependent and -independent activation was demonstrated. The single inhibition of MET by knockdown small interfering RNA or inhibitor indicated a limited anti-viability effects without inhibiting the basal phosphorylation levels of SRC, protein kinase B (AKT) or extracellular signal-regulated kinase (ERK)...
August 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28805811/caveolin-1-dependent-nanoscale-organization-of-the-bcr-regulates-b-cell-tolerance
#10
Susana Minguet, Kathrin Kläsener, Anna-Maria Schaffer, Gina J Fiala, Teresa Osteso-Ibánez, Katrin Raute, Inmaculada Navarro-Lérida, Frederike A Hartl, Maximilian Seidl, Michael Reth, Miguel A Del Pozo
Caveolin-1 (Cav1) regulates the nanoscale organization and compartmentalization of the plasma membrane. Here we found that Cav1 controlled the distribution of nanoclusters of isotype-specific B cell antigen receptors (BCRs) on the surface of B cells. In mature B cells stimulated with antigen, the immunoglobulin M BCR (IgM-BCR) gained access to lipid domains enriched for GM1 glycolipids, by a process that was dependent on the phosphorylation of Cav1 by the Src family of kinases. Antigen-induced reorganization of nanoclusters of IgM-BCRs and IgD-BCRs regulated BCR signaling in vivo...
August 14, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28798028/ptpn2-regulates-t-cell-lineage-commitment-and-%C3%AE-%C3%AE-versus-%C3%AE-%C3%AE-specification
#11
Florian Wiede, Jarrod A Dudakov, Kun-Hui Lu, Garron T Dodd, Tariq Butt, Dale I Godfrey, Andreas Strasser, Richard L Boyd, Tony Tiganis
In the thymus, hematopoietic progenitors commit to the T cell lineage and undergo sequential differentiation to generate diverse T cell subsets, including major histocompatibility complex (MHC)-restricted αβ T cell receptor (TCR) T cells and non-MHC-restricted γδ TCR T cells. The factors controlling precursor commitment and their subsequent maturation and specification into αβ TCR versus γδ TCR T cells remain unclear. Here, we show that the tyrosine phosphatase PTPN2 attenuates STAT5 (signal transducer and activator of transcription 5) signaling to regulate T cell lineage commitment and SRC family kinase LCK and STAT5 signaling to regulate αβ TCR versus γδ TCR T cell development...
August 10, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28797107/jasplakinolide-induces-primary-cilium-formation-through-cell-rounding-and-yap-inactivation
#12
Tomoaki Nagai, Kensaku Mizuno
Primary cilia are non-motile cilia that serve as cellular antennae for sensing and transducing extracellular signals. In general, primary cilia are generated by cell quiescence signals. Recent studies have shown that manipulations to increase actin assembly suppress quiescence-induced ciliogenesis. To further examine the role of actin dynamics in ciliogenesis, we analyzed the effect of jasplakinolide (Jasp), a potent inducer of actin polymerization, on ciliogenesis. Unexpectedly, Jasp treatment induced ciliogenesis in serum-fed cells cultured at low density...
2017: PloS One
https://www.readbyqxmd.com/read/28796998/microrna-dependent-control-of-serotonin-induced-pulmonary-arterial-contraction
#13
Diana Dahan, Tran Thi Hien, Philip Tannenberg, Mari Ekman, Catarina Rippe, Thomas Boettger, Thomas Braun, Karin Tran-Lundmark, Phan-Kiet Tran, Karl Swärd, Sebastian Albinsson
BACKGROUND: Serotonin (5-HT) is considered to play a role in pulmonary arterial hypertension by regulating vascular remodeling and smooth muscle contractility. Here, arteries from mice with inducible and smooth muscle-specific deletion of Dicer were used to address mechanisms by which microRNAs control 5-HT-induced contraction. METHODS: Mice were used 5 weeks after Dicer deletion, and pulmonary artery contractility was analyzed by wire myography. RESULTS: No change was seen in right ventricular systolic pressure following dicer deletion, but systemic blood pressure was reduced...
August 11, 2017: Journal of Vascular Research
https://www.readbyqxmd.com/read/28794229/dock8-drives-src-dependent-nk-cell-effector-function
#14
Conor J Kearney, Stephin J Vervoort, Kelly M Ramsbottom, Andrew J Freeman, Jessica Michie, Jane Peake, Jean-Laurent Casanova, Capucine Picard, Stuart G Tangye, Cindy S Ma, Ricky W Johnstone, Katrina L Randall, Jane Oliaro
Mutations in the dedicator of cytokinesis 8 (DOCK8) gene cause an autosomal recessive form of hyper-IgE syndrome, characterized by chronic immunodeficiency with persistent microbial infection and increased incidence of malignancy. These manifestations suggest a defect in cytotoxic lymphocyte function and immune surveillance. However, how DOCK8 regulates NK cell-driven immune responses remains unclear. In this article, we demonstrate that DOCK8 regulates NK cell cytotoxicity and cytokine production in response to target cell engagement or receptor ligation...
August 9, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28791377/c%C3%A2-maf-inducing-protein-inhibits-cofilin%C3%A2-1-activity-and-alters-podocyte-cytoskeleton-organization
#15
Lixia Yu, Jianming Ye, Qifeng Liu, Jianhua Feng, Xiaoxia Gu, Qiang Sun, Guoyuan Lu
The glomerular visceral epithelial cells, also termed podocytes, are key in maintaining the normal renal filtration barrier. Although it has been demonstrated that stimulation of c‑Maf inducing protein (CMIP) expression is involved in podocyte damage, the molecular events during this process remain unclear. In the current study, CMIP‑induced proximal signaling was investigated by focusing on its effect on cofilin‑1 activity in puromycin aminonucleoside (PA)‑damaged podocytes. An obvious elevation of CMIP expression and phosphorylated (p) cofilin‑1 levels was detected in cultured podocytes treated with PA and in glomeruli isolated from PA‑induced nephropathy rats...
August 3, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28790817/emerging-pharmaceutical-therapies-for-copd
#16
REVIEW
Sowmya P Lakshmi, Aravind T Reddy, Raju C Reddy
COPD, for which cigarette smoking is the major risk factor, remains a worldwide burden. Current therapies provide only limited short-term benefit and fail to halt progression. A variety of potential therapeutic targets are currently being investigated, including COPD-related proinflammatory mediators and signaling pathways. Other investigational compounds target specific aspects or complications of COPD such as mucus hypersecretion and pulmonary hypertension. Although many candidate therapies have shown no significant effects, other emerging therapies have improved lung function, pulmonary hypertension, glucocorticoid sensitivity, and/or the frequency of exacerbations...
2017: International Journal of Chronic Obstructive Pulmonary Disease
https://www.readbyqxmd.com/read/28783171/the-pdgfr%C3%AE-laminin-b1-keratin-19-cascade-drives-tumor-progression-at-the-invasive-front-of-human-hepatocellular-carcinoma
#17
O Govaere, M Petz, J Wouters, Y-P Vandewynckel, E J Scott, B Topal, F Nevens, C Verslype, Q M Anstee, H Van Vlierberghe, W Mikulits, T Roskams
Human hepatocellular carcinomas (HCCs) expressing the biliary/hepatic progenitor cell marker keratin 19 (K19) have been linked with a poor prognosis and exhibit an increase in platelet-derived growth factor receptor α (PDGFRα) and laminin beta 1 (LAMB1) expression. PDGFRα has been reported to induce de novo synthesis of LAMB1 protein in a Sjogren syndrome antigen B (La/SSB)-dependent manner in a murine metastasis model. However, the role of this cascade in human HCC remains unclear. This study focused on the functional role of the PDGFRα-La/SSB-LAMB1 pathway and its molecular link to K19 expression in human HCC...
August 7, 2017: Oncogene
https://www.readbyqxmd.com/read/28775147/combination-therapy-with-c-met-and-src-inhibitors-induces-caspase-dependent-apoptosis-of-merlin-deficient-schwann-cells-and-suppresses-growth-of-schwannoma-cells
#18
Marisa A Fuse, Stephani Klingeman Plati, Sarah S Burns, Christine T Dinh, Olena Bracho, Denise Yan, Rahul Mittal, Rulong Shen, Julia N Soulakova, Alicja J Copik, Xue Zhong Liu, Fred F Telischi, Long-Sheng Chang, Maria Clara Franco, Cristina Fernandez-Valle
Neurofibromatosis type 2 (NF2) is a nervous system tumor disorder caused by inactivation of the merlin tumor suppressor encoded by the NF2 gene. Bilateral vestibular schwannomas (VS) are a diagnostic hallmark of NF2. Mainstream treatment options for NF2-associated tumors have been limited to surgery and radiotherapy; however, off-label uses of targeted molecular therapies are becoming increasingly common. Here we investigated drugs targeting two kinases activated in NF2-associated schwannomas, c-Met and Src...
August 3, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28775097/platelet-derived-growth-factor-receptor-alpha-pdgfr%C3%AE-and-ras-related-c3-botulinum-toxin-substrate-1-rac1-regulate-mechano-responsiveness-of-lung-fibroblasts
#19
Stephen E McGowan, Diann M McCoy
Platelet-derived growth factor (PDGF)-A, which only signals through PDGF-receptor-alpha (PDGFRα) is required for secondary alveolar septal formation. Although PDGFRα distinguishes mesenchymal progenitor cells during the saccular stage, PDGFRα-expressing alveolar cells persist through adulthood. PDGF-A sustains proliferation, limits apoptosis, and maintains alpha-smooth muscle actin (αSMA) containing alveolar cells, which congregate at the alveolar entry ring at postnatal day (P)12. PDGFRα-expressing, αSMA-containing, alveolar cells re-distribute in the elongating septum, suggesting that they migrate to the alveolar entry rings where mechanical tension is higher...
August 3, 2017: American Journal of Physiology. Lung Cellular and Molecular Physiology
https://www.readbyqxmd.com/read/28774834/role-of-forkhead-box-class-o-proteins-in-cancer-progression-and-metastasis
#20
REVIEW
Chang Geun Kim, Hyemin Lee, Nehal Gupta, Sharavan Ramachandran, Itishree Kaushik, Sangeeta Srivastava, Sung-Hoon Kim, Sanjay K Srivastava
It is now widely accepted that several gene alterations including transcription factors are critically involved in cancer progression and metastasis. Forkhead Box Class O proteins (FoxOs) including FoxO1/FKHR, FoxO3/FKHRL1, FoxO4/AFX and FoxO6 transcription factors are known to play key roles in proliferation, apoptosis, metastasis, cell metabolism, aging and cancer biology through their phosphorylation, ubiquitination, acetylation and methylation. Though FoxOs are proved to be mainly regulated by upstream phosphatidylinositol-4,5-bisphosphate 3-kinase (PI3K)/Akt signaling pathway, the role of FoxOs in cancer progression and metastasis still remains unclear so far...
July 31, 2017: Seminars in Cancer Biology
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