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Masoumi N, Ghollasi M, Raheleh Halabian, Eftekhari E, Ghiasi M. Carbachol, along with calcium, indicates new strategy in neural differentiation of human adipose tissue-derived mesenchymal stem cells in vitro. Regen Ther 2023; 23:60-66. [PMID: 37122359 PMCID: PMC10130343 DOI: 10.1016/j.reth.2023.04.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/25/2023] [Accepted: 04/06/2023] [Indexed: 08/27/2023] Open
Abstract
INTRODUCTION Over the past few years, stem cells have represented a promising treatment in neurological disorders due to the well-defined characteristics of their capability to proliferate and differentiate into any cell type, both in vitro and in vivo. Additionally, previous studies have shown that calcium signaling modulates the proliferation and differentiation of neural progenitor cells. The present study investigated the effect of carbachol (CCh), a cholinergic agonist activating acetylcholine receptors, with and without calcium, on the neural differentiation of human adipose tissue-derived mesenchymal stem cells (hADSCs) in neural media, including forskolin and 3-isobutyl-1-methyl-xanthine and retinoic acid. METHODS For this purpose, first, the MTT assay and acridine orange staining were studied to obtain the optimal concentration of CCh. Next, the differentiation tests, such as cellular calcium assay as well as evaluation of qualitative and quantitative expression of neuronal index markers through immunofluorescence staining and gene expression analysis, respectively, were performed on days 7 and 14 of the differentiation period. RESULTS According to the results, CCh at 1 μM concentration had no cytotoxicity on hADSCs and also induced cell proliferation. Furthermore, CCh with and without calcium increased the expression of neural-specific genes (NSE, MAP2, β-III-tubulin, and MAPK3) and proteins (γ-enolase, MAP2, and β-III-tubulin) as well as the amount of calcium in differentiated hADSCs at 7 and 14 days after induction. CONCLUSIONS In conclusion, the findings suggest that CCh acts as an influential therapeutic factor in the field of neural regenerative medicine and research.
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Affiliation(s)
- Niloofar Masoumi
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Marzieh Ghollasi
- Department of Cell and Molecular Biology, Faculty of Biological Sciences, Kharazmi University, Tehran, Iran
| | - Raheleh Halabian
- Applied Microbiology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Elahe Eftekhari
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Mohsen Ghiasi
- Department of Cellular and Molecular Biology, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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Billet A, Luo Y, Balghi H, Hanrahan JW. Role of tyrosine phosphorylation in the muscarinic activation of the cystic fibrosis transmembrane conductance regulator (CFTR). J Biol Chem 2013; 288:21815-23. [PMID: 23760269 DOI: 10.1074/jbc.m113.479360] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Cystic fibrosis transmembrane conductance regulator (CFTR) is a chloride (Cl(-)) channel, which plays an important role in physiological anion and fluid secretion, and is defective in several diseases. Although its activation by PKA and PKC has been studied extensively, its regulation by receptors is less well understood. To study signaling involved in CFTR activation, we measured whole-cell Cl(-) currents in BHK cells cotransfected with GPCRs and CFTR. In cells expressing the M3 muscarinic acetylcholine receptor, the agonist carbachol (Cch) caused strong activation of CFTR through two pathways; the canonical PKA-dependent mechanism and a second mechanism that involves tyrosine phosphorylation. The role of PKA was suggested by partial inhibition of cholinergic stimulation by the specific PKA inhibitor Rp-cAMPS. The role of tyrosine kinases was suggested by Cch stimulation of 15SA-CFTR and 9CA-CFTR, mutants that lack 15 PKA or 9 PKC consensus sequences and are unresponsive to PKA or PKC stimulation, respectively. Moreover the residual Cch response was sensitive to inhibitors of the Pyk2 and Src tyrosine kinase family. Our results suggest that tyrosine phosphorylation acts on CFTR directly and through inhibition of the phosphatase PP2A. Results suggest that PKA and tyrosine kinases contribute to CFTR regulation by GPCRs that are expressed at the apical membrane of intestinal and airway epithelia.
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Affiliation(s)
- Arnaud Billet
- Department of Physiology, McGill University and Research Institute of the McGill University Hospital Centre, Montréal, Quebec H3G 1Y6, Canada.
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Yibchok-anun S, Cheng H, Abu-Basha EA, Ding J, Ioudina M, Hsu WH. Mechanisms of bradykinin-induced glucagon release in clonal alpha-cells In-R1-G9: involvement of Ca(2+)-dependent and -independent pathways. Mol Cell Endocrinol 2002; 192:27-36. [PMID: 12088864 DOI: 10.1016/s0303-7207(02)00115-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanisms by which bradykinin (BK) increases glucagon release were investigated. BK (0.1-10 microM) increased [Ca(2+)](i) and glucagon release in clonal alpha-cells In-R1-G9. BK-induced glucagon release was lower in the absence than in the presence of extracellular Ca(2+), but it still increased glucagon release while [Ca(2+)](i) was stringently deprived. Depletion of intracellular Ca(2+) store with thapsigargin abolished both the BK-induced Ca(2+) peak and sustained plateau. Microinjection of heparin abolished BK-induced Ca(2+) release. Pertussis toxin (PTX) did not block BK-induced [Ca(2+)](i) increase or glucagon release. U-73122 (8 microM), a phospholipase C (PLC) inhibitor, abolished BK-induced increases in [Ca(2+)](i), but only reduced BK-induced glucagon release by 40%. A phospholipase D (PLD) inhibitor zLYCK reduced BK-induced glucagon release by 60%. The combination of U-73122 and zLYCK abolished BK-induced glucagon release. Both SK&F 96365, a receptor-operated Ca(2+) channel (ROC) blocker and nimodipine, an L-type Ca(2+) channel blocker, reduced BK-induced [Ca(2+)](i) increase and glucagon release. These findings suggest that BK increase glucagon release through a PTX-insensitive G protein and both Ca(2+)-dependent and -independent pathways. The Ca(2+)-dependent pathway is attributable to PLC activation. PLC catalyzes IP(3) formation, inducing Ca(2+) release from the endoplasmic reticulum, which, in turn, triggers Ca(2+) influx via both ROCs and L-type channels. PLD activation may be involved in Ca(2+)-dependent and/or -independent pathway.
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Affiliation(s)
- S Yibchok-anun
- Department of Biomedical Sciences, Iowa State University, Ames, IA 50011, USA
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4
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Calcium/calmodulin-dependent protein kinase types II and IV differentially regulate CREB-dependent gene expression. Mol Cell Biol 1994. [PMID: 8065343 DOI: 10.1128/mcb.14.9.6107] [Citation(s) in RCA: 370] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Phosphorylation of CREB (cyclic AMP [cAMP]- response element [CRE]-binding protein) by cAMP-dependent protein kinase (PKA) leads to the activation of many promoters containing CREs. In neurons and other cell types, CREB phosphorylation and activation of CRE-containing promoters can occur in response to elevated intracellular Ca2+. In cultured cells that normally lack this Ca2+ responsiveness, we confer Ca(2+)-mediated activation of a CRE-containing promoter by introducing an expression vector for Ca2+/calmodulin-dependent protein kinase type IV (CaMKIV). Activation could also be mediated directly by a constitutively active form of CaMKIV which is Ca2+ independent. The CaMKIV-mediated gene induction requires the activity of CREB/ATF family members but is independent of PKA activity. In contrast, transient expression of either a constitutively active or wild-type Ca2+/calmodulin-dependent protein kinase type II (CaMKII) fails to mediate the transactivation of the same CRE-containing reporter gene. Examination of the subcellular distribution of transiently expressed CaMKIV and CaMKII reveals that only CaMKIV enters the nucleus. Our results demonstrate that CaMKIV, which is expressed in neuronal, reproductive, and lymphoid tissues, may act as a mediator of Ca(2+)-dependent gene induction.
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Matthews RP, Guthrie CR, Wailes LM, Zhao X, Means AR, McKnight GS. Calcium/calmodulin-dependent protein kinase types II and IV differentially regulate CREB-dependent gene expression. Mol Cell Biol 1994; 14:6107-16. [PMID: 8065343 PMCID: PMC359137 DOI: 10.1128/mcb.14.9.6107-6116.1994] [Citation(s) in RCA: 139] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Phosphorylation of CREB (cyclic AMP [cAMP]- response element [CRE]-binding protein) by cAMP-dependent protein kinase (PKA) leads to the activation of many promoters containing CREs. In neurons and other cell types, CREB phosphorylation and activation of CRE-containing promoters can occur in response to elevated intracellular Ca2+. In cultured cells that normally lack this Ca2+ responsiveness, we confer Ca(2+)-mediated activation of a CRE-containing promoter by introducing an expression vector for Ca2+/calmodulin-dependent protein kinase type IV (CaMKIV). Activation could also be mediated directly by a constitutively active form of CaMKIV which is Ca2+ independent. The CaMKIV-mediated gene induction requires the activity of CREB/ATF family members but is independent of PKA activity. In contrast, transient expression of either a constitutively active or wild-type Ca2+/calmodulin-dependent protein kinase type II (CaMKII) fails to mediate the transactivation of the same CRE-containing reporter gene. Examination of the subcellular distribution of transiently expressed CaMKIV and CaMKII reveals that only CaMKIV enters the nucleus. Our results demonstrate that CaMKIV, which is expressed in neuronal, reproductive, and lymphoid tissues, may act as a mediator of Ca(2+)-dependent gene induction.
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Affiliation(s)
- R P Matthews
- Department of Pharmacology, University of Washington, Seattle 98195
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Abstract
Opioids are coupled through G proteins to both ion channels and adenylyl cyclase. This study describes opioid modulation of the voltage-dependent cation channel, Ih, in cultured guinea pig nodose ganglion neurons. Forskolin, PGE2, and cAMP analogs shifted the voltage dependence of activation of Ih to more depolarized potentials and increased the inward current at -60 mV. Opioids had no effect on Ih alone, but reversed the effect of forskolin on Ih. This action of opioids was blocked by naloxone. Opioids had no effect on Ih in the presence of cAMP analogs, suggesting that modulation occurs at the level of adenylyl cyclase. The shift in the voltage dependence of Ih by agents that induce inflammation (i.e., PGE2) is one potential mechanism to mediate an increased excitability. Opioid inhibition of adenylyl cyclase and subsequent inhibition of Ih may be a mechanism by which opioids inhibit primary afferent excitability and relieve pain.
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Affiliation(s)
- S L Ingram
- Vollum Institute, Oregon Health Sciences University, Portland 97201
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Nardone J, Gerald C, Rimawi L, Song L, Hogan PG. Identification of a B2 bradykinin receptor expressed by PC12 pheochromocytoma cells. Proc Natl Acad Sci U S A 1994; 91:4412-6. [PMID: 8183922 PMCID: PMC43795 DOI: 10.1073/pnas.91.10.4412] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
We have used rat PC12 pheochromocytoma cells, a clonal cell line closely related to sympathetic neurons, to investigate reports that the bradykinin receptor expressed in the peripheral nervous system is distinct from the well-characterized B2 bradykinin receptor of smooth muscle. Although there have been reports that [Thi5,8,D-Phe7]bradykinin [where Thi is beta-(2-thienyl)alanine] is a full agonist at some sites in the peripheral nervous system, we find that in PC12 cells [Thi5,8,D-Phe7]bradykinin behaves as a competitive antagonist of bradykinin-stimulated phosphatidylinositol turnover. In particular, sufficient concentrations of [Thi5,8,D-Phe7]bradykinin completely block the increase in inositol bisphosphate and trisphosphate in response to 100 nM bradykinin; [Thi5,8,D-Phe7]bradykinin alone, at up to 10 microM, does not appreciably increase inositol bisphosphate and trisphosphate. In contrast to the absence of evidence for a distinctive neuronal receptor, we have found convincing evidence that the bradykinin receptor previously identified in smooth muscle is present in PC12 cells. Using the polymerase chain reaction, we have isolated a full-length cDNA encoding a bradykinin receptor that is expressed in PC12 cells and verified that its nucleotide sequence is identical except at a single position to that of the rat uterine B2 bradykinin receptor. When expressed in COS cells this uterine bradykinin receptor exhibits the same high affinity for [3H]bradykinin (Kd 4.4 nM), the same relative affinities for a series of kinin antagonists, and the same efficient coupling to phosphatidylinositol turnover (EC50 2.5 nM) as the receptor in PC12 cells. We interpret our data, and the findings of a number of pharmacological studies, as strengthening the view that the B2 receptor expressed in PC12 cells and in certain cells of the peripheral nervous system is identical to the receptor in rat uterine smooth muscle.
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Affiliation(s)
- J Nardone
- Department of Neurobiology, Harvard Medical School, Boston, MA 02215
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Gurwitz D, Haring R, Heldman E, Fraser CM, Manor D, Fisher A. Discrete activation of transduction pathways associated with acetylcholine m1 receptor by several muscarinic ligands. Eur J Pharmacol 1994; 267:21-31. [PMID: 8206127 DOI: 10.1016/0922-4106(94)90220-8] [Citation(s) in RCA: 105] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Activation of transfected muscarinic m1 acetylcholine receptors (m1AChR) has been linked to several signal transduction pathways which include phosphoinositide hydrolysis, arachidonic acid release and cAMP accumulation. In Chinese hamster ovary cells stably transfected with the rat m1AChR gene, carbachol elicited all three responses with EC50 values of 2.6, 3.8 and 76 microM, respectively. However, pilocarpine and the selective muscarinic agonist AF102B activated phosphoinositide hydrolysis (by 94 and 27% vs. carbachol, respectively), while antagonizing carbachol-mediated cAMP accumulation. Carbachol also activated (by 4-fold) adenylyl cyclase in membranes prepared from these cells, indicating independence of this signal from intracellular mediators. Moreover, carbachol and AF102B similarly elevated cytosolic Ca2+ in intact m1AChR-transfected cells. The ligand-selective cAMP accumulation, its independence from Ca2+ and the carbachol-activated adenylyl cyclase in membranes suggest that it represents an independent m1AChR-mediated signal, unrelated to phosphoinositide hydrolysis. Selective muscarinic ligands such as AF102B may independently activate distinct signalling pathways, which may be important for designing cholinergic replacement therapy for treating Alzheimer's disease.
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Affiliation(s)
- D Gurwitz
- Israel Institute for Biological Research, Ness-Ziona
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Kim UH, Han MK, Park BH, Kim HR, An NH. Function of NAD glycohydrolase in ADP-ribose uptake from NAD by human erythrocytes. BIOCHIMICA ET BIOPHYSICA ACTA 1993; 1178:121-6. [PMID: 8394137 DOI: 10.1016/0167-4889(93)90001-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The function of the ectoenzyme NAD glycohydrolase (NADase) in ADP-ribose uptake from extracellular NAD was studied in human erythrocytes that express relatively high NADase activity (adult erythrocytes) and erythrocytes expressing very low activity (newborn erythrocytes). The rates of ADP-ribose uptake from NAD in human erythrocytes were correlated with their NADase activities. In contrast, there was no significant difference in the rates of ADP-ribose uptake among these cells when incubated with ADP-ribose. These results indicate that ecto-NADase may have a role as supplier of ADP-ribose for its uptake into the cells and that the cleavage of NAD by NADase is necessary for the ADP-ribose uptake by human erythrocytes. From ADP-ribose uptake studies at 37 degrees C a Km of 0.7 +/- 0.05 microM and a Vmax of 2.04 +/- 0.1 pmol/min per microliter cell water was found for the uptake of [3H]ADP-ribose. The thiol-reactive reagents p-chloromercuribenzene sulfonic acid and N-ethylmaleimide inhibited the uptake ADP-ribose with IC50 values of 50 +/- 4 and 750 +/- 25 mM, respectively. Since efflux of [3H]ADP-ribose was negligible, the ADP-ribose transport system appears to be unidirectional. The unidirectionality was supported by the evidence that transported ADP-ribose was rapidly degraded to AMP which is impermeable to the membrane.
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Affiliation(s)
- U H Kim
- Department of Biochemistry, Chonbuk National University Medical School, Chonju, South Korea
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Tanaka S, Koike T. Caffeine promotes survival of cultured sympathetic neurons deprived of nerve growth factor through a cAMP-dependent mechanism. BIOCHIMICA ET BIOPHYSICA ACTA 1992; 1175:114-22. [PMID: 1336398 DOI: 10.1016/0167-4889(92)90017-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The effects of caffeine on neuronal survival independent of trophic factor support were examined in developing superior cervical ganglion in vitro. We found that caffeine promoted neuronal survival in the absence of nerve growth-factor (NGF) in a dose-dependent manner (EC50 = 6 mM). Pulse treatment with caffeine or high K+ (40 mM), which caused only a transient increase in intracellular free Ca2+ levels ([Ca2+]i), did not promote survival. In contrast, caffeine potentiated the saving effect of various phosphodiesterase inhibitors including theophylline (EC50 = 3 mM) and 3-isobutyl-1-methylxanthine (EC50 = 0.4 mM). Non-xanthine phosphodiesterase inhibitor Ro 20-1724 potentiated the survival promoting effect of caffeine or IBMX. Indeed, administration of 20 mM caffeine rapidly restored the cAMP level of NGF-deprived neurons to normal (0.34 pmol/well) within 10 min; the level reached a plateau level (0.69 pmol/well) at 10 h. Even after 1 day, the sustained level was maintained in the presence of caffeine. In contrast, noradrenaline and isoproterenol, which cause only a transient increase in cAMP levels, did not support survival. These data, in conjunction with others, suggest that sustained levels of second messengers, including not only the [Ca2+]i but also the cAMP level, would support the survival of superior cervical ganglion cells independent of trophic factor support.
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Affiliation(s)
- S Tanaka
- Department of Natural Science, Saga Medical School, Japan
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Suidan HS, Tolkovsky AM. Simultaneous analysis of adenosine 3',5'-cyclic monophosphate accumulation and adenosine 5'-triphosphate metabolism in cultured cells preincubated with [2-3H]adenine. Anal Biochem 1992; 205:159-65. [PMID: 1332535 DOI: 10.1016/0003-2697(92)90593-v] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A simple and sensitive method based on metabolic labeling was developed for the simultaneous analysis of cyclic AMP accumulation and ATP metabolism in small numbers of cultured cells. Cells are preincubated overnight with [2-3H]adenine to label the ATP pool to a high specific activity. After cell stimulation the metabolites are extracted in a small volume of aqueous acetic acid and chloroform and separated without further manipulation by one-dimensional thin-layer chromatography and the radioactivity incorporated is determined by liquid scintillation counting. With ATP labeled to about 6 Ci/mmol, the lower limit of cyclic AMP detection is 2 fmol, a sensitivity that is comparable to the radioimmunoassay of acetylated cyclic AMP. In primary neurons and a neural cell line, for example, levels of ATP and its metabolites change when large amounts of cyclic AMP are generated, each with its unique pattern. ATP is also depleted when metabolic energy is consumed concomitantly with stimulation of cyclic AMP production by agonists, probably as a result of an increase in ion pump activity following cation influx. As ATP is utilized for cyclic AMP production and simultaneously for many other processes, an assessment of its metabolism in parallel with that of cyclic AMP is critical. We suggest that the method described here is particularly advantageous over other methods for this purpose.
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Affiliation(s)
- H S Suidan
- Department of Biochemistry, University of Cambridge, United Kingdom
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Begum N, Sussman K, Draznin B. Calcium-induced inhibition of phosphoserine phosphatase in insulin target cells is mediated by the phosphorylation and activation of inhibitor 1. J Biol Chem 1992. [DOI: 10.1016/s0021-9258(18)42648-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Suidan HS, Stone SR, Hemmings BA, Monard D. Thrombin causes neurite retraction in neuronal cells through activation of cell surface receptors. Neuron 1992; 8:363-75. [PMID: 1310864 DOI: 10.1016/0896-6273(92)90302-t] [Citation(s) in RCA: 210] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The mechanism by which thrombin induces neurite retraction was studied in NB2a mouse neuroblastoma cells. The rapid effect of thrombin (completed within minutes) appears to involve an interaction between its anion-binding exosite and the thrombin receptor. Structural alterations of this site increase the EC50 for thrombin-mediated retraction, and a hirudin C-terminal peptide that blocks this site inhibits the response. The thrombin effect was mimicked by a 14 amino acid peptide starting with Ser-42, at the proposed cleavage site of the human thrombin receptor. The protein kinase inhibitors staurosporine and H-7 blocked thrombin-induced retraction. It is therefore proposed that thrombin-mediated neurite retraction is caused by cleavage-induced activation of the thrombin receptor and involves stimulation of a protein kinase(s).
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Affiliation(s)
- H S Suidan
- Friedrich Miescher-Institut, Basel, Switzerland
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Induction of immediate early genes by Ca2+ influx requires cAMP-dependent protein kinase in PC12 cells. J Biol Chem 1991. [DOI: 10.1016/s0021-9258(19)47394-8] [Citation(s) in RCA: 113] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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