51
|
Hundsrucker C, Krause G, Beyermann M, Prinz A, Zimmermann B, Diekmann O, Lorenz D, Stefan E, Nedvetsky P, Dathe M, Christian F, Mcsorley T, Krause E, Mcconnachie G, Herberg F, Scott J, Rosenthal W, Klussmann E. High-affinity AKAP7delta-protein kinase A interaction yields novel protein kinase A-anchoring disruptor peptides. Biochem J 2006; 396:297-306. [PMID: 16483255 PMCID: PMC1462715 DOI: 10.1042/bj20051970] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PKA (protein kinase A) is tethered to subcellular compartments by direct interaction of its regulatory subunits (RI or RII) with AKAPs (A kinase-anchoring proteins). AKAPs preferentially bind RII subunits via their RII-binding domains. RII-binding domains form structurally conserved amphipathic helices with unrelated sequences. Their binding affinities for RII subunits differ greatly within the AKAP family. Amongst the AKAPs that bind RIIalpha subunits with high affinity is AKAP7delta [AKAP18delta; K(d) (equilibrium dissociation constant) value of 31 nM]. An N-terminally truncated AKAP7delta mutant binds RIIalpha subunits with higher affinity than the full-length protein presumably due to loss of an inhibitory region [Henn, Edemir, Stefan, Wiesner, Lorenz, Theilig, Schmidtt, Vossebein, Tamma, Beyermann et al. (2004) J. Biol. Chem. 279, 26654-26665]. In the present study, we demonstrate that peptides (25 amino acid residues) derived from the RII-binding domain of AKAP7delta bind RIIalpha subunits with higher affinity (K(d)=0.4+/-0.3 nM) than either full-length or N-terminally truncated AKAP7delta, or peptides derived from other RII binding domains. The AKAP7delta-derived peptides and stearate-coupled membrane-permeable mutants effectively disrupt AKAP-RII subunit interactions in vitro and in cell-based assays. Thus they are valuable novel tools for studying anchored PKA signalling. Molecular modelling indicated that the high affinity binding of the amphipathic helix, which forms the RII-binding domain of AKAP7delta, with RII subunits involves both the hydrophobic and the hydrophilic faces of the helix. Alanine scanning (25 amino acid peptides, SPOT technology, combined with RII overlay assays) of the RII binding domain revealed that hydrophobic amino acid residues form the backbone of the interaction and that hydrogen bond- and salt-bridge-forming amino acid residues increase the affinity of the interaction.
Collapse
Affiliation(s)
- Christian Hundsrucker
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Gerd Krause
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Michael Beyermann
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Anke Prinz
- †Institut für Biochemie, Universität Kassel, Heinrich-Plett-Str. 40, 34109 Kassel, Germany
| | | | - Oliver Diekmann
- ‡Biaffin GmbH & Co. KG, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
| | - Dorothea Lorenz
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Eduard Stefan
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Pavel Nedvetsky
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Margitta Dathe
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Frank Christian
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Theresa Mcsorley
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - Eberhard Krause
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
| | - George Mcconnachie
- §Howard Hughes Medical Institute, Vollum Institute, Oregon Health and Science University, Portland, OR 97239, U.S.A
| | - Friedrich W. Herberg
- †Institut für Biochemie, Universität Kassel, Heinrich-Plett-Str. 40, 34109 Kassel, Germany
| | - John D. Scott
- §Howard Hughes Medical Institute, Vollum Institute, Oregon Health and Science University, Portland, OR 97239, U.S.A
| | - Walter Rosenthal
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
- ¶Institut für Pharmakologie, Charité – Universitätsmedizin Berlin, Campus Benjamin Franklin, Freie Universität Berlin, Thielallee 67–73, 14195 Berlin, Germany
| | - Enno Klussmann
- *Leibniz-Institut für Molekulare Pharmakologie, Campus Berlin-Buch, Robert-Rössle-Str. 10, 13125 Berlin, Germany
- ¶Institut für Pharmakologie, Charité – Universitätsmedizin Berlin, Campus Benjamin Franklin, Freie Universität Berlin, Thielallee 67–73, 14195 Berlin, Germany
- To whom correspondence should be addressed (email )
| |
Collapse
|
52
|
Gesellchen F, Prinz A, Zimmermann B, Herberg FW. Quantification of cAMP antagonist action in vitro and in living cells. Eur J Cell Biol 2006; 85:663-72. [PMID: 16529845 DOI: 10.1016/j.ejcb.2006.01.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
cAMP-dependent protein kinase (PKA) plays a key role in intracellular signalling. cAMP antagonists, acting as suppressors of PKA activity by preventing PKA-holoenzyme dissociation, have received increasing attention because of their potential use in diagnostics as well as for therapeutic purposes. A large number of cAMP analogs have been described over the last three decades and methodology has been established to monitor cAMP agonists action by either following enzymatic activity or holoenzyme dissociation. This is not the case for cAMP antagonists, where only a few substances have been demonstrated to exhibit effects in the low micromolar range, for example, Rp-8-Br-cAMPS. A main drawback in the development of new compounds is the lack of technologies to assess antagonist action in an in vitro situation as well as in living cells. Here we quantify the effect of several cAMP analogs applying three different biochemical/biophysical assay setups and one in-cell assay. This includes two methods monitoring subunit dissociation in a test tube, namely AlphaScreen, a bead-based proximity assay, and surface plasmon resonance, determining the association and dissociation patterns of the two PKA subunits in real time in response to antagonists. BRET(2), performed in living cells in a 96-well format, allows testing for the efficacy of membrane-permeable cAMP analogs based on a genetically engineered cAMP sensor. Using novel and established experimental strategies side by side, the action of cAMP and cAMP analogs was tested on type Ialpha PKA holoenzyme, thus generating methodology to screen drug libraries for potential cAMP antagonists with high accuracy, reproducibility as well as potential for automation.
Collapse
Affiliation(s)
- Frank Gesellchen
- Department of Biochemistry, Kassel University, Heinrich-Plett-Str. 40, D-34132 Kassel, Germany.
| | | | | | | |
Collapse
|
53
|
Prinz A, Diskar M, Erlbruch A, Herberg FW. Novel, isotype-specific sensors for protein kinase A subunit interaction based on bioluminescence resonance energy transfer (BRET). Cell Signal 2006; 18:1616-25. [PMID: 16524697 DOI: 10.1016/j.cellsig.2006.01.013] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2005] [Accepted: 01/11/2006] [Indexed: 11/26/2022]
Abstract
Homogeneous protein-protein interaction assays without the need of a separation step are an essential tool to unravel signal transduction events in live cells. We have established an isoform specific protein kinase A (PKA) subunit interaction assay based on bioluminescence resonance energy transfer (BRET). Tagging human Ralpha(I)-, Ralpha(II)-, as well as Calpha-subunits of PKA with Renilla luciferase (Rluc) as the bioluminescent donor or with green fluorescent protein (GFP2) as the energy acceptor, respectively, allows to directly probe PKA subunit interaction in living cells as well as in total cell extracts in order to study side by side PKA type I versus type II holoenzyme dynamics. Several novel, genetically encoded cAMP sensors and-for the first time PKA type I sensors-were generated. When C- and R-subunits are assembled to the respective holoenzyme complexes inside the cell, BRET occurs with a signal up to three times above the background. An increase of endogenous cAMP levels as well as treatment with the cAMP analog 8-Br-cAMP is reflected by a dose-dependent BRET signal reduction in cells expressing wild type proteins. In contrast to type II, the dissociation of the PKA type I holoenzyme complex was never complete in cells with maximally elevated cAMP levels. Both sensors dissociated completely upon treatment with 8-Br-cAMP after cell lysis, consistent with in vitro activation assays using holoenzymes assembled from purified PKA subunits. Interestingly, incubation of cells with the PKA antagonist Rp-8-Br-cAMPS leads to a significant BRET signal increase in cells expressing PKA type I or type II isoforms, indicating a stabilization of the holoenzyme complexes in vivo. Mutant RI subunits with reduced (hRIalpha-R210K) or abolished (hRIalpha-G200E/G324E) cAMP binding capability were studied to quantify maximal signal to noise ratios for the RI-BRET sensor. Utilizing BRET we demonstrate that PKA type II holoenzyme was rendered insensitive to beta-adrenergic receptor stimulation with isoproterenol when anchoring to the plasma membrane of COS-7 cells was disrupted by either using Ht31 peptide or by depletion of membrane cholesterol.
Collapse
Affiliation(s)
- Anke Prinz
- University of Kassel, Department of Biochemistry, Heinrich Plett Str. 40, D-34132 Kassel, Germany.
| | | | | | | |
Collapse
|
54
|
Chrétien F, Roussel F, Hilly M, Mauger J, Chapleur Y. New Sugar‐Based Permeant Analogs of D‐ Myo ‐Inositol 1,4,5‐Trisphosphate Mimicking the Effect of Vasopressin: Synthesis and Biologic Evaluation*. J Carbohydr Chem 2005. [DOI: 10.1081/car-200068070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
55
|
Furuta T, Takeuchi H, Isozaki M, Takahashi Y, Kanehara M, Sugimoto M, Watanabe T, Noguchi K, Dore TM, Kurahashi T, Iwamura M, Tsien RY. Bhc-cNMPs as either water-soluble or membrane-permeant photoreleasable cyclic nucleotides for both one- and two-photon excitation. Chembiochem 2005; 5:1119-28. [PMID: 15300837 DOI: 10.1002/cbic.200300814] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Cyclic nucleoside monophosphates (cNMPs) play key roles in many cellular regulatory processes, such as growth, differentiation, motility, and gene expression. Caged derivatives that can be activated by irradiation could be powerful tools for studying such diverse functions of intracellular second messengers, since the spatiotemporal dynamics of these molecules can be controlled by irradiation with appropriately focused light. Here we report the synthesis, photochemistry, and biological testing of 6-bromo-7-hydroxycoumarin-4-ylmethyl esters of cNMP (Bhc-cNMP) and their acetyl derivatives (Bhc-cNMP/Ac) as new caged second messengers. Irradiation of Bhc-cNMPs quantitatively produced the parent cNMPs with one-photon uncaging efficiencies (Phiepsilon) of up to one order of magnitude better than those of 2-nitrophenethyl (NPE) cNMPs. In addition, two-photon induced photochemical release of cNMP from Bhc-cNMPs (7 and 8) can be observed with the two-photon uncaging action cross-sections (delta(u)) of up to 2.28 GM (1 GM=10(-50) cm(4) s photon(-1)), which is the largest value among those of the reported Bhc-caged compounds. The wavelength dependence of the delta(u) values of 7 revealed that the peak wavelength was twice that of the one-photon absorption maximum. Bhc-cNMPs showed practically useful water solubility (nearly 500 microM), whereas 7-acetylated derivatives (Bhc-cNMPs/Ac) were expected to have a certain membrane permeability. Their advantages were demonstrated in two types of biological systems: the opening of cAMP-mediated transduction channels in newt olfactory receptor cells and cAMP-mediated motility responses in epidermal melanophores in scales from medaka fish. Both examples showed that Bhc and Bhc/Ac caged compounds have great potential for use in many cell biological applications.
Collapse
Affiliation(s)
- Toshiaki Furuta
- Department of Biomolecular Science, Toho University, 2-2-1 Miyama, Funabashi 274-8510, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
56
|
Kim M, Kleckley TS, Wiemer AJ, Holstein SA, Hohl RJ, Wiemer DF. Synthesis and activity of fluorescent isoprenoid pyrophosphate analogues. J Org Chem 2005; 69:8186-93. [PMID: 15549786 DOI: 10.1021/jo049101w] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New fluorescent analogues of farnesol and geranylgeraniol have been prepared and then converted to the corresponding pyrophosphates. These analogues incorporate anthranylate or dansyl-like groups anchored to the terpenoid skeleton through amine bonds that would be expected to be relatively stable to metabolism. After addition of the alcohols or the pyrophosphates to the culture medium, their fluorescence is readily observed inside a human-derived leukemia cell line. Enzyme assays have revealed that the farnesyl pyrophosphate analogue is an inhibitor of FTase, while the corresponding alcohol is not. These results, together with Western blot analyses of cell lysates, indicate that the farnesyl pyrophosphate analogue penetrates the cells as an intact pyrophosphate and that it does so at a biologically relevant concentration.
Collapse
Affiliation(s)
- MeeKyoung Kim
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242-1294, USA
| | | | | | | | | | | |
Collapse
|
57
|
Bartsch M, Zorn-Kruppa M, Kühl N, Genieser HG, Schwede F, Jastorff B. Bioactivatable, membrane-permeant analogs of cyclic nucleotides as biological tools for growth control of C6 glioma cells. Biol Chem 2004; 384:1321-6. [PMID: 14515995 DOI: 10.1515/bc.2003.148] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In the present study, the cAMP analogs 8-bromo-cAMP (8-Br-cAMP), N6-2'O-dibutyryl-cAMP (DBcAMP) and 8-para-chlorophenylthio-cAMP (8-CPT-cAMP), as well as the corresponding cAMP-acetoxymethyl (AM)-ester-prodrugs were tested in a HPLC study for their membrane permeability, intracellular accumulation and biotransformation. Antiproliferative activities of these compounds were studied in the rat C6 glioma cell line. Chromatographic analysis revealed that the AM-ester analogs of the cyclic nucleotides penetrate quantitatively into rat C6 glioma cells and generate high amounts of their parent cyclic nucleotides intracellularly within 60 min; however, long-term growth inhibition tested in C6 cells is only slightly enhanced with the AM-ester prodrugs of 8-Br-cAMP or DBcAMP.
Collapse
Affiliation(s)
- Martin Bartsch
- Zentrum für Umwellforschung und Umwelttechnologie (UFT), Abt. Bioorganische Chemie, Universität Bremen, Leobener Strasse, D-28359 Bremen, Germany
| | | | | | | | | | | |
Collapse
|
58
|
Abstract
Bioactivatable protecting groups represent an enormously powerful tool to increase bioavailability or to generally help deliver drugs to cells. This approach is particularly valuable in the case of biologically active phosphates because of the high intrinsic hydrophilicity and the multitude of biological functions phosphate esters exhibit inside cells. Here, the most prominent masking groups used so far are introduced. The stability and toxicology of the resulting prodrugs is discussed. Finally, this review tries to cover briefly some of the work that describes the usefulness and efficiency of the approach in various application areas.
Collapse
Affiliation(s)
- Carsten Schultz
- European Molecular Biology Laboratory, Meyerhofstr. 1, 69117, Heidelberg, Germany.
| |
Collapse
|
59
|
|
60
|
Kopperud R, Christensen AE, Kjarland E, Viste K, Kleivdal H, Døskeland SO. Formation of inactive cAMP-saturated holoenzyme of cAMP-dependent protein kinase under physiological conditions. J Biol Chem 2002; 277:13443-8. [PMID: 11834733 DOI: 10.1074/jbc.m109869200] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The complex of the subunits (RIalpha, Calpha) of cAMP-dependent protein kinase I (cA-PKI) was much more stable (K(d) = 0.25 microm) in the presence of excess cAMP than previously thought. The ternary complex of C subunit with cAMP-saturated RIalpha or RIIalpha was devoid of catalytic activity against either peptide or physiological protein substrates. The ternary complex was destabilized by protein kinase substrate. Extrapolation from the in vitro data suggested about one-fourth of the C subunit to be in ternary complex in maximally cAMP-stimulated cells. Cells overexpressing either RIalpha or RIIalpha showed decreased CRE-dependent gene induction in response to maximal cAMP stimulation. This could be explained by enhanced ternary complex formation. Modulation of ternary complex formation by the level of R subunit may represent a novel way of regulating the cAMP kinase activity in maximally cAMP-stimulated cells.
Collapse
Affiliation(s)
- Reidun Kopperud
- Department of Anatomy and Cell Biology, University of Bergen, N-5009 Bergen, Norway
| | | | | | | | | | | |
Collapse
|
61
|
|
62
|
Schwede F, Maronde E, Genieser H, Jastorff B. Cyclic nucleotide analogs as biochemical tools and prospective drugs. Pharmacol Ther 2000; 87:199-226. [PMID: 11008001 DOI: 10.1016/s0163-7258(00)00051-6] [Citation(s) in RCA: 191] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Cyclic AMP (cAMP) and cyclic GMP (cGMP) are key second messengers involved in a multitude of cellular events. From the wealth of synthetic analogs of cAMP and cGMP, only a few have been explored with regard to their therapeutic potential. Some of the first-generation cyclic nucleotide analogs were promising enough to be tested as drugs, for instance N(6),O(2)'-dibutyryl-cAMP and 8-chloro-cAMP (currently in clinical Phase II trials as an anticancer agent). Moreover, 8-bromo and dibutyryl analogs of cAMP and cGMP have become standard tools for investigations of biochemical and physiological signal transduction pathways. The discovery of the Rp-diastereomers of adenosine 3',5'-cyclic monophosphorothioate and guanosine 3',5'-cyclic monophosphorothioate as competitive inhibitors of cAMP- and cGMP-dependent protein kinases, as well as subsequent development of related analogs, has proven very useful for studying the molecular basis of signal transduction. These analogs exhibit a higher membrane permeability, increased resistance against degradation, and improved target specificity. Furthermore, better understanding of signaling pathways and ligand/protein interactions has led to new therapeutic strategies. For instance, Rp-8-bromo-adenosine 3',5'-cyclic monophosphorothioate is employed against diseases of the immune system. This review will focus mainly on recent developments in cyclic nucleotide-related biochemical and pharmacological research, but also highlights some historical findings in the field.
Collapse
Affiliation(s)
- F Schwede
- Center for Environmental Research and Environmental Technology, Department of Bioorganic Chemistry, University of Bremen, Leobener Strasse, D-28359, Bremen, Germany
| | | | | | | |
Collapse
|
63
|
Schwede F, Brustugun OT, Zorn-Kruppa M, Døskeland SO, Jastorff B. Membrane-permeant, bioactivatable analogues of cGMP as inducers of cell death in IPC-81 leukemia cells. Bioorg Med Chem Lett 2000; 10:571-3. [PMID: 10741556 DOI: 10.1016/s0960-894x(00)00050-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report an improved single-step synthesis to generate the membrane-permeant acetoxymethyl esters (AM-esters) of cGMP and three cGMP-analogues. These bioactivatable compounds were found to induce cell death in rat IPC-81 cells, a model system for acute myelocytic leukemia, in micromolar doses, while the corresponding non-modified cGMP-analogues were inactive.
Collapse
Affiliation(s)
- F Schwede
- Zentrum für Umweltforschung und -technologie, Abt. Bioorganische Chemie, Universität Bremen, Germany
| | | | | | | | | |
Collapse
|
64
|
Kang SH, Sinhababu AK, Cho MJ. Synthesis and biological activity of bis(pivaloyloxymethyl) ester of 2'-azido-2'-deoxyuridine 5'-monophosphate. NUCLEOSIDES & NUCLEOTIDES 1998; 17:1089-98. [PMID: 9708324 DOI: 10.1080/07328319808004222] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Bis(pivaloyloxymethyl) ester of 2'-azido-2'-deoxyuridine 5'-monophosphate was prepared as a prodrug to generate 2'-azido-2'-deoxyuridine 5'-diphosphate inside the cell. A synthetic route utilizing stannyl phosphate was adopted in the preparation. The prodrug was evaluated for cell growth inhibition against a variety of tumor cell lines along with 2'-azido-2'-deoxyuridine and 2'-azido-2'-deoxycytidine.
Collapse
Affiliation(s)
- S H Kang
- School of Pharmacy, University of North Carolina, Chapel Hill 27514, USA
| | | | | |
Collapse
|
65
|
Somogyi G, Nishitani S, Nomi D, Buchwald P, Prokai L, Bodor N. Targeted drug delivery to the brain via phosphonate derivatives. Int J Pharm 1998. [DOI: 10.1016/s0378-5173(98)00025-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
66
|
Jiang T, Sweeney G, Rudolf MT, Klip A, Traynor-Kaplan A, Tsien RY. Membrane-permeant esters of phosphatidylinositol 3,4,5-trisphosphate. J Biol Chem 1998; 273:11017-24. [PMID: 9556583 DOI: 10.1074/jbc.273.18.11017] [Citation(s) in RCA: 129] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Phosphoinositide 3-OH kinases and their products, D-3 phosphorylated phosphoinositides, are increasingly recognized as crucial elements in many signaling cascades. A reliable means to introduce these lipids into intact cells would be of great value for showing the physiological roles of this pathway and for testing the specificity of pharmacological inhibitors of the kinases. We have stereospecifically synthesized di-C8-PIP3/AM and di-C12-PIP3/AM, the heptakis(acetoxymethyl) esters of dioctanoyl- and dilauroylphosphatidylinositol 3,4,5-trisphosphate, in 14 steps from myo-inositol. The ability of these uncharged lipophilic derivatives to deliver phosphatidylinositol 3,4,5-trisphosphate across cell membranes was demonstrated on 3T3-L1 adipocytes and T84 colon carcinoma monolayers. Insulin stimulation of hexose uptake into adipocytes was inhibited by the kinase inhibitor wortmannin and was largely restored by di-C8-PIP3/AM, which had no effect in the absence of insulin. Thus phosphatidylinositol 3,4,5-trisphosphate or a metabolite was necessary but not sufficient for stimulation of hexose transport. In T84 epithelial monolayers, di-C12-PIP3/AM mimicked epidermal growth factor in inhibiting chloride secretion and potassium efflux, suggesting that phosphatidylinositol 3,4, 5-trisphosphate was sufficient to modulate these fluxes and mediate epidermal growth factor's action.
Collapse
Affiliation(s)
- T Jiang
- Department of Pharmacology and Howard Hughes Medical Institute, University of California San Diego, La Jolla, California 92093-0647, USA
| | | | | | | | | | | |
Collapse
|
67
|
DeBernardi MA, Brooker G. Simultaneous fluorescence ratio imaging of cyclic AMP and calcium kinetics in single living cells. ADVANCES IN SECOND MESSENGER AND PHOSPHOPROTEIN RESEARCH 1998; 32:195-213. [PMID: 9421592 DOI: 10.1016/s1040-7952(98)80012-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- M A DeBernardi
- Department of Cell Biology, Georgetown University School of Medicine, Washington, DC 20007, USA
| | | |
Collapse
|
68
|
Li W, Schultz C, Llopis J, Tsien RY. Membrane-permeant esters of inositol polyphosphates, chemical syntheses and biological applications. Tetrahedron 1997. [DOI: 10.1016/s0040-4020(97)00714-x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
69
|
|
70
|
Freeman S, Ross KC. 3 Prodrug Design for Phosphates and Phosphonates. PROGRESS IN MEDICINAL CHEMISTRY 1997. [DOI: 10.1016/s0079-6468(08)70106-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
|
71
|
Briggs AD, Camplo M, Freeman S, Lundström J, Pring BG. Acyloxymethyl and 4-acyloxybenzyl diester prodrugs of phosphonoformate. Tetrahedron 1996. [DOI: 10.1016/0040-4020(96)00906-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
72
|
Gigg J, Gigg R. The one-pot esterification of phosphoric acids with silver carbonate and alkyl halides in refluxing toluene. Carbohydr Res 1996. [DOI: 10.1016/0008-6215(96)00084-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
73
|
|
74
|
Comments on nucleotide delivery forms. ACTA ACUST UNITED AC 1996. [DOI: 10.1016/s1075-8593(96)80105-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
|
75
|
Schultz C, Burmester A, Stadler C. Synthesis, separation, and identification of different inositol phosphates. Subcell Biochem 1996; 26:371-413. [PMID: 8744272 DOI: 10.1007/978-1-4613-0343-5_13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- C Schultz
- Institute for Organic Chemistry, University of Bremen, Germany
| | | | | |
Collapse
|
76
|
Potter BVL, Lampe D. Die Chemie der Inositlipid-vermittelten zellulären Signalübertragung. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951071804] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
77
|
Iyer RP, Yu D, Ho NH, Agrawal S. Synthesis of Iodoalkylacylates and Their Use in the preparation ofS-Alkyl Phosphorothiolates. SYNTHETIC COMMUN 1995. [DOI: 10.1080/00397919508011821] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
78
|
Rodriguez-Pascual F, Miras-Portugal MT, Torres M. Cyclic GMP-dependent protein kinase activation mediates inhibition of catecholamines secretion and Ca2+ influx in bovine chromaffin cells. Neuroscience 1995; 67:149-57. [PMID: 7477895 DOI: 10.1016/0306-4522(95)00035-h] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The effects of the membrane-permeable cGMP analogue, 8-bromoguanosine 3':5'-cyclic monophosphate on acetylcholine-evoked catecholamine secretion and cytosolic calcium increases were studied in chromaffin cells from the bovine adrenal gland. Preincubation with 100 microM 8-bromoguanosine 3':5'-cyclic monophosphate during 10 and 30 min decreased the acetylcholine-evoked catecholamine release by 16 +/- 3% and 27 /+- 5%, respectively. The cytosolic calcium increases triggered by acetylcholine and 30 mM KCl were also inhibited by 30 min of preincubation with this compound by 27 +/- 4 and 34 /+- 12%, respectively. Changes in membrane potential induced by acetylcholine and KCl were not affected by preincubation with 8-bromoguanosine 3':5'-cyclic monophosphate. The cyclic GMP-dependent protein kinase inhibitor N-[2-(methylamino)ethyl]-5-isoquinoline sulfonamide dihydrochloride-at l micron abolished the inhibitory effect of 8-bromoguanosine 3':5'-cyclic monophosphate on acetylcholine-evoked calcium increase. By contrast, a potent and selective inhibitor against cyclic AMP-dependent protein kinase, N-[2-(p-bromocinnamylamino)ethyl]-5-isoquinolinesulfonamide did not block the 8-bromoguanosine 3':5'-cyclic monophosphate effect. Additionally, 8-bromoguanosine 3':5'-cyclic monophosphate stimulated histone F2b phosphorylation by a partial purified cGMP-dependent protein kinase from chromaffin cells. The extent of histone phosphorylation was reduced by N-[2-(methylamino)ethyl]-5-isoquinolinesulfonamide dihydrochloride and 8-(4-chlorophenylthio)-guanosine 3':5'-cyclic monophosphorothioate, Rp-isomer, a specific inhibitor against cyclic GMP-dependent protein kinase, whereas it was not modified by N-[2-(p-bromocinnamylamino)ethyl]-5-isoquinoline sulfonamide. The results suggest that the inhibitory effects of 8-bromoguanosine 3':5' cyclic monophosphate on chromaffin cells are mediated through the activation of cGMP-dependent protein kinase.(ABSTRACT TRUNCATED AT 250 WORDS)
Collapse
Affiliation(s)
- F Rodriguez-Pascual
- Departamento de Bioquímica, Facultad de Veterinaria, Universidad Complutense de Madrid, Spain
| | | | | |
Collapse
|
79
|
Vajanaphanich M, Schultz C, Rudolf MT, Wasserman M, Enyedi P, Craxton A, Shears SB, Tsien RY, Barrett KE, Traynor-Kaplan A. Long-term uncoupling of chloride secretion from intracellular calcium levels by Ins(3,4,5,6)P4. Nature 1994; 371:711-4. [PMID: 7935818 DOI: 10.1038/371711a0] [Citation(s) in RCA: 169] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Osmoregulation, inhibitory neurotransmission and pH balance depend on chloride ion (Cl-) flux. In intestinal epithelial cells, apical Cl- channels control salt and fluid secretion and are, in turn, regulated by agonists acting through cyclic nucleotides and internal calcium ion concentration ([Ca2+]i). Recently, we found that muscarinic pretreatment prevents [Ca2+]i increases from eliciting Cl- secretion in T84 colonic epithelial cells. By studying concomitant inositol phosphate metabolism, we have now identified D-myo-inositol 3,4,5,6-tetrakisphosphate (Ins(3,4,5,6)P4), as the inositol phosphate most likely to mediate this uncoupling. A novel, membrane-permeant ester prepared by total synthesis delivers Ins(3,4,5,6)P4 intracellularly and confirms that this emerging messenger does inhibit Cl- flux resulting from thapsigargin- or histamine-induced [Ca2+]i elevations.
Collapse
Affiliation(s)
- M Vajanaphanich
- Department of Medicine, School of Medicine, University of California, San Diego, La Jolla 92093
| | | | | | | | | | | | | | | | | | | |
Collapse
|
80
|
Iyer RP, Yu D, Agrawal S. Stereospecific bio-reversibility of dinucleoside S-alkyl phosphorothiolates to dinucleoside phosphorothioates. Bioorg Med Chem Lett 1994. [DOI: 10.1016/s0960-894x(01)80412-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
81
|
Zhuo M, Hu Y, Schultz C, Kandel ER, Hawkins RD. Role of guanylyl cyclase and cGMP-dependent protein kinase in long-term potentiation. Nature 1994; 368:635-9. [PMID: 7908417 DOI: 10.1038/368635a0] [Citation(s) in RCA: 366] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Several lines of evidence suggest that cyclic GMP might be involved in long-term potentiation (LTP) in the hippocampus. Arachidonic acid, nitric oxide and carbon monoxide, three molecules that have been proposed to act as retrograde messengers in LTP, all activate soluble guanylyl cyclase. We report here that an inhibitor of guanylyl cyclase blocks the induction of LTP in the CA1 region of hippocampal slices. Conversely, cGMP analogues produce long-lasting enhancement of the excitatory postsynaptic potential if they are applied at the same time as weak tetanic stimulation of the presynaptic fibres. The enhancement is spatially restricted, is not blocked by valeric acid (APV), nifedipine, or picrotoxin, and partially occludes LTP. This synaptic enhancement may be mediated by the cGMP-dependent protein kinase (PKG). Inhibitors of PKG block the induction of LTP, and activators of PKG produce activity-dependent long-lasting enhancement. These results suggest that guanylyl cyclase and PKG contribute to LTP, possibly as activity-dependent presynaptic effectors of retrograde messengers.
Collapse
Affiliation(s)
- M Zhuo
- Center for Neurobiology and Behavior, College of Physicians and Surgeons, Columbia University, New York, New York
| | | | | | | | | |
Collapse
|
82
|
Schultz C, Vajanaphanich M, Harootunian A, Sammak P, Barrett K, Tsien R. Acetoxymethyl esters of phosphates, enhancement of the permeability and potency of cAMP. J Biol Chem 1993. [DOI: 10.1016/s0021-9258(18)53255-5] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
|