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Purinergic Signalling

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https://www.readbyqxmd.com/read/28616713/modulation-of-the-tgf-%C3%AE-1-induced-epithelial-to-mesenchymal-transition-emt-mediated-by-p1-and-p2-purine-receptors-in-mdck-cells
#1
Mariachiara Zuccarini, Patricia Giuliani, Silvana Buccella, Valentina Di Liberto, Giuseppa Mudò, Natale Belluardo, Marzia Carluccio, Margherita Rossini, Daniele Filippo Condorelli, Michel Piers Rathbone, Francesco Caciagli, Renata Ciccarelli, Patrizia Di Iorio
Epithelial to mesenchymal transition (EMT) occurs during embryogenesis or under pathological conditions such as hypoxia, injury, chronic inflammation, or tissue fibrosis. In renal tubular epithelial cells (MDCK), TGF-β1 induces EMT by reducing or increasing epithelial or mesenchymal marker expression, respectively. In this study, we confirmed that the cAMP analogues, 8-CPT-cAMP or N6-Ph-cAMP, inhibited the TGF-β1-driven overexpression of the mesenchymal markers ZEB-1, Slug, Fibronectin, and α-SMA. Furthermore, we showed that A1, A2A, P2Y1, P2Y11, and P2X7 purine receptor agonists modulated the TGF-β1-induced EMT through the involvement of PKA and/or MAPK/ERK signaling...
June 14, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28616712/vesicular-nucleotide-transporter-vnut-appearance-of-an-actress-on-the-stage-of-purinergic-signaling
#2
REVIEW
Yoshinori Moriyama, Miki Hiasa, Shohei Sakamoto, Hiroshi Omote, Masatoshi Nomura
Vesicular storage of ATP is one of the processes initiating purinergic chemical transmission. Although an active transport mechanism was postulated to be involved in the processes, a transporter(s) responsible for the vesicular storage of ATP remained unidentified for some time. In 2008, SLC17A9, the last identified member of the solute carrier 17 type I inorganic phosphate transporter family, was found to encode the vesicular nucleotide transporter (VNUT) that is responsible for the vesicular storage of ATP...
June 14, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28597172/the-p2x7-receptor-is-not-essential-for-development-of-imiquimod-induced-psoriasis-like-inflammation-in-mice
#3
Nicholas J Geraghty, Kylie J Mansfield, Stephen J Fuller, Debbie Watson, Ronald Sluyter
Psoriasis is a chronic inflammatory skin disorder, characterised by epidermal hyperplasia (acanthosis) and leukocyte infiltration of the skin. Current therapies are inadequate, highlighting the need for new therapeutic targets. The P2X7 receptor is implicated in the pathogenesis of psoriasis. This study investigated the role of P2X7 in imiquimod (IMQ)-induced psoriasis-like inflammation. Topically applied IMQ caused twofold greater ear swelling in BALB/c mice compared to C57BL/6 mice, which encode a partial loss-of-function missense mutation in the P2RX7 gene...
June 8, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28555330/the-p2y1-receptor-mediated-leukocyte-adhesion-to-endothelial-cells-is-inhibited-by-melatonin
#4
Tassya Cataldi Cardoso, Thaís Emanuelle Pompeu, Claudia Lucia Martins Silva
Extracellular ATP (released by endothelial and immune cells) and its metabolite ADP are important pro-inflammatory mediators via the activation of purinergic P2 receptors (P2Y and P2X), which represent potential new targets for anti-inflammatory therapy. Endothelial P2Y1 receptor (P2Y1R) induces endothelial cell activation triggering leukocyte adhesion. A number of data have implicated melatonin as a modulator of immunity, inflammation, and endothelial cell function, but to date no studies have investigated whether melatonin modulates endothelial P2YR signaling...
May 29, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28547381/purinergic-signalling-links-mechanical-breath-profile-and-alveolar-mechanics-with-the-pro-inflammatory-innate-immune-response-causing-ventilation-induced-lung-injury
#5
REVIEW
Djo Hasan, Paul Blankman, Gary F Nieman
Severe pulmonary infection or vigorous cyclic deformation of the alveolar epithelial type I (AT I) cells by mechanical ventilation leads to massive extracellular ATP release. High levels of extracellular ATP saturate the ATP hydrolysis enzymes CD39 and CD73 resulting in persistent high ATP levels despite the conversion to adenosine. Above a certain level, extracellular ATP molecules act as danger-associated molecular patterns (DAMPs) and activate the pro-inflammatory response of the innate immunity through purinergic receptors on the surface of the immune cells...
May 26, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28540569/altered-purinergic-signaling-in-uridine-adenosine-tetraphosphate-induced-coronary-relaxation-in-swine-with-metabolic-derangement
#6
Zhichao Zhou, Oana Sorop, Vincent J de Beer, Ilkka Heinonen, Caroline Cheng, A H Jan Danser, Dirk J Duncker, Daphne Merkus
We previously demonstrated that uridine adenosine tetraphosphate (Up4A) induces potent and partially endothelium-dependent relaxation in the healthy porcine coronary microvasculature. We subsequently showed that Up4A-induced porcine coronary relaxation was impaired via downregulation of P1 receptors after myocardial infarction. In view of the deleterious effect of metabolic derangement on vascular function, we hypothesized that the coronary vasodilator response to Up4A is impaired in metabolic derangement, and that the involvement of purinergic receptor subtypes and endothelium-derived vasoactive factors (EDVFs) is altered...
May 24, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28536931/guanosine-promotes-cytotoxicity-via-adenosine-receptors-and-induces-apoptosis-in-temozolomide-treated-a172-glioma-cells
#7
Karen A Oliveira, Tharine A Dal-Cim, Flávia G Lopes, Cláudia B Nedel, Carla Inês Tasca
Gliomas are a malignant tumor group whose patients have survival rates around 12 months. Among the treatments are the alkylating agents as temozolomide (TMZ), although gliomas have shown multiple resistance mechanisms for chemotherapy. Guanosine (GUO) is an endogenous nucleoside involved in extracellular signaling that presents neuroprotective effects and also shows the effect of inducing differentiation in cancer cells. The chemotherapy allied to adjuvant drugs are being suggested as a novel approach in gliomas treatment...
May 23, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28516276/p2x7-receptor-pannexin-1-interaction-mediates-extracellular-alpha-synuclein-induced-atp-release-in-neuroblastoma-sh-sy5y-cells
#8
Anna Wilkaniec, Magdalena Gąssowska, Grzegorz A Czapski, Magdalena Cieślik, Grzegorz Sulkowski, Agata Adamczyk
Abnormalities of alpha-synuclein (ASN), the main component of protein deposits (Lewy bodies), were observed in Parkinson's disease (PD), dementia with Lewy bodies, Alzheimer's disease, and other neurodegenerative disorders. These alterations include increase in the levels of soluble ASN oligomers in the extracellular space. Numerous works have identified several mechanisms of their toxicity, including stimulation of the microglial P2X7 receptor leading to oxidative stress. While the significant role of purinergic signaling-particularly, P2 family receptors-in neurodegenerative disorders is well known, the interaction of extracellular soluble ASN with neuronal purinergic receptors is yet to be studied...
May 17, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28497417/purinergic-p2x7-receptor-functional-genetic-polymorphisms-are-associated-with-the-susceptibility-to-osteoporosis-in-chinese-postmenopausal-women
#9
Hong Xu, Chengxin Gong, Luling He, Shenqiang Rao, Xingzi Liu, Yijun Nie, Changle Liu, Tao Li, Lu Ding, Yunming Tu, Yuping Yang, Fangfang Hu, Yongfang Fan, Hui Wang, Shuo Wang, Chaopeng Xiong, Peipei Zhong, Lan Tang, Shangdong Liang
Osteoporosis (OP) is a major public health problem worldwide. Genetic factors are considered to be major contributors to the pathogenesis of OP. The purinergic P2X7 receptor (P2X7R) has been shown to play a role in the regulation of osteoblast and osteoclast activity and has been considered as an important candidate gene for OP. A case-control study was performed to investigate the associations of functional single nucleotide polymorphisms (SNPs) in the P2X7R gene (rs2393799, rs7958311, rs1718119, rs2230911, and rs3751143) with susceptibility to OP in 400 Chinese OP patients and 400 controls...
May 11, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28409324/generation-and-characterization-of-polyclonal-and-monoclonal-antibodies-to-human-ntpdase2-including-a-blocking-antibody
#10
Julie Pelletier, Hervé Agonsanou, Ninotchska Delvalle, Michel Fausther, Mabrouka Salem, Brian Gulbransen, Jean Sévigny
Nucleoside triphosphate diphosphohydrolase-2 (NTPDase2) is an ectonucleotidase that modulates P2 receptor activation by hydrolyzing ATP to ADP. In rodents, NTPDase2 is expressed by several specialized cell types such as vascular adventitial cells, neuroglial cells, hepatic portal fibroblasts, gustatory type I cells, and cells within the connective tissues of reproductive and gastrointestinal organs. Much less is known regarding the expression and function of NTPDase2 in humans. Here, we developed specific research tools to study human NTPDase2...
April 13, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28397110/potential-role-of-p2x7r-in-esophageal-squamous-cell-carcinoma-proliferation
#11
André A Santos, Angélica R Cappellari, Fernanda O de Marchi, Marina P Gehring, Aline Zaparte, Caroline A Brandão, Tiago Giuliani Lopes, Vinicius D da Silva, Luis Felipe Ribeiro Pinto, Luiz Eduardo Baggio Savio, Aline Cristina Abreu Moreira-Souza, Robson Coutinho-Silva, Juliano D Paccez, Luiz F Zerbini, Fernanda B Morrone
Esophageal cancer is an aggressive tumor and is the sixth leading cause of cancer death worldwide. ATP is well known to regulate cancer progression in a variety of models by different mechanisms, including P2X7R activation. This study aimed to evaluate the role of P2X7R in esophageal squamous cell carcinoma (ESCC) proliferation. Our results show that treatment with high ATP concentrations induced a decrease in cell number, cell viability, number of polyclonal colonies, and reduced migration of ESCC. The treatment with the selective P2X7R antagonist A740003 or siRNA for P2X7 reverted this effect in the KYSE450 cell line...
April 11, 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28353082/erratum-to-the-effect-of-sinomenine-in-diabetic-neuropathic-pain-mediated-by-the-p2x3-receptor-in-dorsal-root-ganglia
#12
Shenqiang Rao, Shuangmei Liu, Lifang Zou, Tianyu Jia, Shanhong Zhao, Bing Wu, Zhihua Yi, Shouyu Wang, Yun Xue, Yun Gao, Changshui Xu, Guilin Li, Hong Xu, Chunping Zhang, Shangdong Liang
No abstract text is available yet for this article.
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28343356/development-of-a-novel-strategy-to-target-cd39-antithrombotic-activity-to-the-endothelial-platelet-microenvironment-in-kidney-ischemia-reperfusion-injury
#13
Maithili Sashindranath, Karen M Dwyer, Shala Dezfouli, Carly Selan, Sandra Crikis, Bo Lu, Yuping Yuan, Michael J Hickey, Karlheinz Peter, Simon C Robson, Peter J Cowan, Harshal H Nandurkar
Kidney ischemia-reperfusion injury (IRI) is common during transplantation. IRI is characterised by inflammation and thrombosis and associated with acute and chronic graft dysfunction. P-selectin and its ligand PSGL-1 are cell adhesion molecules that control leukocyte-endothelial and leukocyte-platelet interactions under inflammatory conditions. CD39 is the dominant vascular nucleotidase that facilitates adenosine generation via extracellular ATP/ADP-phosphohydrolysis. Adenosine signalling is protective in renal IRI, but CD39 catalytic activity is lost with exposure to oxidant stress...
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28233082/prasugrel-suppresses-development-of-lithium-induced-nephrogenic-diabetes-insipidus-in-mice
#14
Yue Zhang, János Peti-Peterdi, Anna U Brandes, Anne Riquier-Brison, Noel G Carlson, Christa E Müller, Carolyn M Ecelbarger, Bellamkonda K Kishore
Previously, we localized ADP-activated P2Y12 receptor (R) in rodent kidney and showed that its blockade by clopidogrel bisulfate (CLPD) attenuates lithium (Li)-induced nephrogenic diabetes insipidus (NDI). Here, we evaluated the effect of prasugrel (PRSG) administration on Li-induced NDI in mice. Both CLPD and PRSG belong to the thienopyridine class of ADP receptor antagonists. Groups of age-matched adult male B6D2 mice (N = 5/group) were fed either regular rodent chow (CNT), or with added LiCl (40 mmol/kg chow) or PRSG in drinking water (10 mg/kg bw/day) or a combination of LiCl and PRSG for 14 days and then euthanized...
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28176024/hyperosmotic-stress-induces-atp-release-and-changes-in-p2x7-receptor-levels-in-human-corneal-and-conjunctival-epithelial-cells
#15
Ana Guzman-Aranguez, María J Pérez de Lara, Jesús Pintor
Tear hyperosmolarity is a key event in dry eye. In this work, we analyzed whether hyperosmolar challenge induces ATP release on the ocular surface. Moreover, as extracellular ATP can activate P2X7 receptor, the changes in P2X7 protein levels and its involvement in pathological process triggered by hypertonic treatment were also examined. High-performance liquid chromatography analysis revealed that ATP levels significantly increased in human corneal and conjunctival epithelial cells exposed to hyperosmotic challenge as well as in dry eye patients as compared to control subjects...
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28054206/the-effect-of-sinomenine-in-diabetic-neuropathic-pain-mediated-by-the-p2x3-receptor-in-dorsal-root-ganglia
#16
Shenqiang Rao, Shuangmei Liu, Lifang Zou, Tianyu Jia, Shanhong Zhao, Bing Wu, Zhihua Yi, Shouyu Wang, Yun Xue, Yun Gao, Changshui Xu, Guilin Li, Hong Xu, Chunping Zhang, Shangdong Liang
Type 2 diabetes mellitus (T2DM) accounts for more than 90% of all cases of diabetes mellitus (DM). Diabetic neuropathic pain (DNP) is a common complication of T2DM. Sinomenine is a natural bioactive component extracted from the Sinomenium acutum and has anti-inflammatory effects. The aim of our study was to investigate the effects of sinomenine on DNP mediated by the P2X3 receptor in dorsal root ganglia (DRG). The mechanical withdrawal threshold (MWT) and thermal withdrawal latency (TWL) in T2DM rats were lower than those of control rats...
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/28028627/effect-of-electroacupuncture-on-the-cervicospinal-p2x7-receptor-fractalkine-cx3cr1-signaling-pathway-in-a-rat-neck-incision-pain-model
#17
Y H Gao, C W Li, J Y Wang, L H Tan, C L Duanmu, X H Jing, X R Chang, J L Liu
Increasing evidence supports that acupuncture intervention is an effective approach for intraoperative and postoperative pain. Neuron-microglia crosstalk, mediated by the purinergic P2X7 receptor (R)/fractalkine/CX3CR1 cascade in the spinal cord dorsal horn, plays a pivotal role in pain processing. However, its involvement in the analgesic effect of electroacupuncture (EA) remains unclear. In this study, a rat neck-incision pain model was established by making a longitudinal incision along the midline of the neck and subsequent repeated mechanical stimulation...
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/27966087/signaling-pathways-underlying-the-antidepressant-like-effect-of-inosine-in-mice
#18
Filipe Marques Gonçalves, Vivian Binder Neis, Débora Kurrle Rieger, Mark William Lopes, Isabella A Heinrich, Ana Paula Costa, Ana Lúcia S Rodrigues, Manuella P Kaster, Rodrigo Bainy Leal
Inosine is a purine nucleoside formed by the breakdown of adenosine that elicits an antidepressant-like effect in mice through activation of adenosine A1 and A2A receptors. However, the signaling pathways underlying this effect are largely unknown. To address this issue, the present study investigated the influence of extracellular-regulated protein kinase (ERK)1/2, Ca(2+)/calmoduline-dependent protein kinase (CaMKII), protein kinase A (PKA), phosphoinositide 3-kinase (PI3K)/Akt, and glycogen synthase kinase 3beta (GSK-3β) modulation in the antiimmobility effect of inosine in the tail suspension test (TST) in mice...
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/27915383/a-covalent-antagonist-for-the-human-adenosine-a2a-receptor
#19
Xue Yang, Guo Dong, Thomas J M Michiels, Eelke B Lenselink, Laura Heitman, Julien Louvel, Ad P IJzerman
The structure of the human A2A adenosine receptor has been elucidated by X-ray crystallography with a high affinity non-xanthine antagonist, ZM241385, bound to it. This template molecule served as a starting point for the incorporation of reactive moieties that cause the ligand to covalently bind to the receptor. In particular, we incorporated a fluorosulfonyl moiety onto ZM241385, which yielded LUF7445 (4-((3-((7-amino-2-(furan-2-yl)-[1, 2, 4]triazolo[1,5-a][1, 3, 5]triazin-5-yl)amino)propyl)carbamoyl)benzene sulfonyl fluoride)...
June 2017: Purinergic Signalling
https://www.readbyqxmd.com/read/27866341/the-role-of-the-p2x7-receptor-in-murine-cutaneous-leishmaniasis-aspects-of-inflammation-and-parasite-control
#20
Vanessa Ribeiro Figliuolo, Suzana Passos Chaves, Luiz Eduardo Baggio Savio, Maria Luiza Prates Thorstenberg, Érika Machado Salles, Christina Maeda Takiya, Maria Regina D'Império-Lima, Herbert Leonel de Matos Guedes, Bartira Rossi-Bergmann, Robson Coutinho-Silva
Leishmania amazonensis is the etiological agent of diffuse cutaneous leishmaniasis. The immunopathology of leishmaniasis caused by L. amazonensis infection is dependent on the pathogenic role of effector CD4(+) T cells. Purinergic signalling has been implicated in resistance to infection by different intracellular parasites. In this study, we evaluated the role of the P2X7 receptor in modulating the immune response and susceptibility to infection by L. amazonensis. We found that P2X7-deficient mice are more susceptible to L...
June 2017: Purinergic Signalling
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