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Brauneck F, Seubert E, Wellbrock J, Schulze zur Wiesch J, Duan Y, Magnus T, Bokemeyer C, Koch-Nolte F, Menzel S, Fiedler W. Combined Blockade of TIGIT and CD39 or A2AR Enhances NK-92 Cell-Mediated Cytotoxicity in AML. Int J Mol Sci 2021; 22:ijms222312919. [PMID: 34884723 PMCID: PMC8657570 DOI: 10.3390/ijms222312919] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 01/17/2023] Open
Abstract
This study aimed to characterize different natural killer (NK) cell phenotypes on bone marrow and peripheral blood cells from acute myeloid leukemia (AML) patients and healthy donors (HDs). Our data show that CD56dimCD16− and CD56brightCD16− NK cells represent the predominant NK cell subpopulations in AML, while the CD56dimCD16+ NK cells are significantly reduced compared to HDs. Moreover, TIGIT+ and PVRIG+ cells cluster on the CD56dimCD16+ subset whereas CD39+ and CD38+ cells do so on CD56brightCD16− NK cells in AML. Furthermore, functional effects of (co-)blockade of TIGIT and CD39 or A2AR on NK cell functionality were analyzed. These experiments revealed that the single blockade of the TIGIT receptor results in an increased NK-92 cell-mediated killing of AML cells in vitro. Combined targeting of CD39 or A2AR significantly augments the anti-TIGIT-mediated lysis of AML cells. Our data indicate that distinct NK cell subsets in AML exhibit different immunosuppressive patterns (via the TIGIT/PVRIG receptors and the purinergic pathway). In summary, we conclude that TIGIT, CD39, and A2AR constitute relevant inhibitory checkpoints of NK cells in AML patients. A combinatorial blockade synergistically strengthens NK-92 cell-mediated cytotoxicity. As inhibitors of TIGIT, CD39, and A2AR are clinically available, studies on their combined use could be conducted in the near future.
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Affiliation(s)
- Franziska Brauneck
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald University Cancer Center, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (F.B.); (E.S.); (J.W.); (C.B.)
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
| | - Elisa Seubert
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald University Cancer Center, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (F.B.); (E.S.); (J.W.); (C.B.)
| | - Jasmin Wellbrock
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald University Cancer Center, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (F.B.); (E.S.); (J.W.); (C.B.)
| | - Julian Schulze zur Wiesch
- Infectious Diseases Unit, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
| | - Yinghui Duan
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (Y.D.); (T.M.)
| | - Tim Magnus
- Department of Neurology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (Y.D.); (T.M.)
| | - Carsten Bokemeyer
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald University Cancer Center, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (F.B.); (E.S.); (J.W.); (C.B.)
| | - Friedrich Koch-Nolte
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
| | - Stephan Menzel
- Mildred Scheel Cancer Career Center HaTriCS4, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
| | - Walter Fiedler
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, Hubertus Wald University Cancer Center, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany; (F.B.); (E.S.); (J.W.); (C.B.)
- Correspondence:
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Abbas S, Afzal S, Nadeem H, Hussain D, Langer P, Sévigny J, Ashraf Z, Iqbal J. Synthesis, characterization and biological evaluation of thiadiazole amide derivatives as nucleoside triphosphate diphosphohydrolases (NTPDases) inhibitors. Bioorg Chem 2021; 118:105456. [PMID: 34800887 DOI: 10.1016/j.bioorg.2021.105456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 09/21/2021] [Accepted: 10/23/2021] [Indexed: 11/17/2022]
Abstract
Importance of extracellular nucleotides is widely understood. These nucleotides act as ligand for P2X and P2Y receptors and modulate a variety of biological functions. However, their extracellular concentration is maintained by a chain of enzymes termed as ecto-nucleotidases. Amongst them, nucleoside triphosphate diphosphohydrolases (NTPDases) is an important enzyme family responsible for the dephosphorylation of these nucleotides. Overexpression of NTPDases leads to many pathological conditions such as cancer and thrombosis. So far, only a few NTPDase inhibitors have been reported. Considering this scarcity of (NTPDase) inhibitors, a number of thiadiazole amide derivatives were synthesized and screened against human (h)-NTPDases. Several compounds showed promising inhibitory activity; compound 5a (IC50 (µM); 0.05 ± 0.008) and 5g (IC50 (µM); 0.04 ± 0.006) appeared to be the most distinguished molecules corresponding to h-NTPDase1 and -2. However, h-NTPDase3 was the least susceptible isozyme and only three compounds (5d, 5e, 5j) strongly inhibited h-NTPDase3. Interestingly, compound 5e was recognized as the most active compound that showed dual inhibition against h-NTPDase3 as well as against h-NTPDase8. For better comprehension of binding mode of these inhibitors, most potent inhibitors were docked with their respective isozyme.
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Affiliation(s)
- Sadia Abbas
- Department of Chemistry, Allama Iqbal Open University, Islamabad 44000, Pakistan
| | - Saira Afzal
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Humaira Nadeem
- Department of Pharmaceutical Chemistry, Riphah Institute of Pharmaceutical Sciences, Riphah International University, Islamabad, Pakistan
| | - Dilawar Hussain
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan
| | - Peter Langer
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany; Leibniz Institut für Katalyse an der Universität Rostock e.V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Jean Sévigny
- Centre de Recherche du CHU de Québec - Université Laval, Québec, QC G1V 4G2, Canada; Département de microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada
| | - Zaman Ashraf
- Department of Chemistry, Allama Iqbal Open University, Islamabad 44000, Pakistan.
| | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS University Islamabad, Abbottabad Campus, Abbottabad 22060, Pakistan.
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Viczjan G, Erdei T, Ovari I, Lampe N, Szekeres R, Bombicz M, Takacs B, Szilagyi A, Zsuga J, Szilvassy Z, Juhasz B, Gesztelyi R. A Body of Circumstantial Evidence for the Irreversible Ectonucleotidase Inhibitory Action of FSCPX, an Agent Known as a Selective Irreversible A 1 Adenosine Receptor Antagonist So Far. Int J Mol Sci 2021; 22:ijms22189831. [PMID: 34575993 PMCID: PMC8464902 DOI: 10.3390/ijms22189831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 09/04/2021] [Accepted: 09/09/2021] [Indexed: 11/18/2022] Open
Abstract
In previous studies using isolated, paced guinea pig left atria, we observed that FSCPX, known as a selective A1 adenosine receptor antagonist, paradoxically increased the direct negative inotropic response to A1 adenosine receptor agonists (determined using concentration/effect (E/c) curves) if NBTI, a nucleoside transport inhibitor, was present. Based on mathematical modeling, we hypothesized that FSCPX blunted the cardiac interstitial adenosine accumulation in response to nucleoside transport blockade, probably by inhibiting CD39 and/or CD73, which are the two main enzymes of the interstitial adenosine production in the heart. The goal of the present study was to test this hypothesis. In vitro CD39 and CD73 inhibitor assays were carried out; furthermore, E/c curves were constructed in isolated, paced rat and guinea pig left atria using adenosine, CHA and CPA (two A1 adenosine receptor agonists), FSCPX, NBTI and NBMPR (two nucleoside transport inhibitors), and PSB-12379 (a CD73 inhibitor), measuring the contractile force. We found that FSCPX did not show any inhibitory effect during the in vitro enzyme assays. However, we successfully reproduced the paradox effect of FSCPX in the rat model, mimicked the “paradox” effect of FSCPX with PSB-12379, and demonstrated the lipophilia of FSCPX, which could explain the negative outcome of inhibitor assays with CD39 and CD73 dissolved in a water-based solution. Taken together, these three pieces of indirect evidence are strong enough to indicate that FSCPX possesses an additional action besides the A1 adenosine receptor antagonism, which action may be the inhibition of an ectonucleotidase. Incidentally, we found that POM-1 inhibited CD73, in addition to CD39.
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Affiliation(s)
- Gabor Viczjan
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
- Doctoral School of Nutrition and Food Sciences, University of Debrecen, H-4032 Debrecen, Hungary
| | - Tamas Erdei
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Ignac Ovari
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Nora Lampe
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Reka Szekeres
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Mariann Bombicz
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Barbara Takacs
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Anna Szilagyi
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Judit Zsuga
- Department of Health Systems Management and Quality Management for Health Care, Faculty of Public Health, University of Debrecen, H-4032 Debrecen, Hungary;
| | - Zoltan Szilvassy
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Bela Juhasz
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
| | - Rudolf Gesztelyi
- Department of Pharmacology and Pharmacotherapy, Faculty of Medicine, University of Debrecen, H-4032 Debrecen, Hungary; (G.V.); (T.E.); (I.O.); (N.L.); (R.S.); (M.B.); (B.T.); (A.S.); (Z.S.); (B.J.)
- Correspondence: ; Tel.: +36-52-427-899
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Shuai C, Xia GQ, Yuan F, Wang S, Lv XW. CD39-mediated ATP-adenosine signalling promotes hepatic stellate cell activation and alcoholic liver disease. Eur J Pharmacol 2021; 905:174198. [PMID: 34033815 DOI: 10.1016/j.ejphar.2021.174198] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 02/24/2021] [Accepted: 05/17/2021] [Indexed: 12/12/2022]
Abstract
CD39 is associated with diverse physiological and pathological processes, including cell proliferation and differentiation. Adenosine triphosphate (ATP) is hydrolysed to adenosine by different enzymes including ecto-nucleoside triphosphate diphosphohydrolase-1/ENTPD1 (CD39) and ecto-5'-nucleotidase (CD73), regulating many physiological and pathological processes in various diseases, but these changes and functions in alcoholic liver disease are generally unknown. In this study, an alcoholic liver disease model in vivo was induced by ethanol plus carbon tetrachloride(CCl4) administered to C57BL/6 mice, who were the intraperitoneally injected with the CD39 inhibitor sodium polyoxotungstate (POM1) or colchicine from the 5th week to the 8th week. Meanwhile, hepatic stellate cells were stimulated by acetaldehyde to replicate alcoholic liver fibrosis models in vitro. Exogenous ATP and POM1 were added in turn to the culture system. Pharmacological blockade of CD39 largely prevents liver damage and collagen deposition. We found that blockade or silencing of CD39 prevented acetaldehyde-induced proliferation of HSC-T6 cells and the expression of fibrogenic factors. Moreover, blockade or silencing of CD39 could block the activation of the adenosine A2A and adenosine A2B receptors and the TGF-β/Smad3 pathway, which are essential events in HSC activation. Thus, blockade of CD39 to inhibit the transduction of ATP to adenosine may prevent HSC activation, alleviating alcoholic hepatic fibrosis. The findings from this study suggest ATP-adenosine signalling is a novel therapeutic and preventive target for alcoholic liver disease.
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Affiliation(s)
- Chen Shuai
- Institute for Liver Diseases of Anhui Medical University, Hefei, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, Hefei, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China
| | - Guo-Qing Xia
- Institute for Liver Diseases of Anhui Medical University, Hefei, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, Hefei, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China
| | - Fei Yuan
- Institute for Liver Diseases of Anhui Medical University, Hefei, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, Hefei, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China
| | - Sheng Wang
- Department of Pharmacy, Yijishan Affiliated Hospital of Wannan Medical College, Wuhu, 241001, Anhui Province, China
| | - Xiong-Wen Lv
- Institute for Liver Diseases of Anhui Medical University, Hefei, China; The Key Laboratory of Anti-inflammatory and Immune Medicines, Ministry of Education, Hefei, China; Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China.
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Clark G, Brown KA, Tripathy MK, Roux SJ. Recent Advances Clarifying the Structure and Function of Plant Apyrases (Nucleoside Triphosphate Diphosphohydrolases). Int J Mol Sci 2021; 22:ijms22063283. [PMID: 33807069 PMCID: PMC8004787 DOI: 10.3390/ijms22063283] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 01/22/2023] Open
Abstract
Studies implicating an important role for apyrase (NTPDase) enzymes in plant growth and development began appearing in the literature more than three decades ago. After early studies primarily in potato, Arabidopsis and legumes, especially important discoveries that advanced an understanding of the biochemistry, structure and function of these enzymes have been published in the last half-dozen years, revealing that they carry out key functions in diverse other plants. These recent discoveries about plant apyrases include, among others, novel findings on its crystal structures, its biochemistry, its roles in plant stress responses and its induction of major changes in gene expression when its expression is suppressed or enhanced. This review will describe and discuss these recent advances and the major questions about plant apyrases that remain unanswered.
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Affiliation(s)
- Greg Clark
- Department of Molecular Biosciences, University of Texas, Austin, TX 78712, USA; (G.C.); (K.A.B.)
| | - Katherine A. Brown
- Department of Molecular Biosciences, University of Texas, Austin, TX 78712, USA; (G.C.); (K.A.B.)
- Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, UK
| | | | - Stanley J. Roux
- Department of Molecular Biosciences, University of Texas, Austin, TX 78712, USA; (G.C.); (K.A.B.)
- Correspondence: ; Tel.: +1-512-471-4238
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Wang Y, Wang C, Zhu Y, Zhang Y, Chen B, Wu Y, Yao J, Miao Z. Discovery of natural product ellagic acid as a potent CD73 and CD39 dual inhibitor. Bioorg Med Chem Lett 2021; 34:127758. [PMID: 33359608 DOI: 10.1016/j.bmcl.2020.127758] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 12/15/2020] [Accepted: 12/20/2020] [Indexed: 11/18/2022]
Abstract
The ATP-adenosine pathway has been recently identified as an attractive immune-oncology target and several drug candidates have been entered clinic trials. Inspired by the report of the first small-molecule CD73inhibitor AB680, we describe the discovery of natural product ellagic acid as a dual CD73 and CD39 inhibitor with an IC50 value of 1.85 ± 0.21 μM and 0.50 ± 0.22 μM, respectively. The result of cytotoxicity assays indicated that ellagic acid is a valuable lead compound with low cytotoxicity effect for immune therapy.
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Affiliation(s)
- Yuan Wang
- School of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, Ningxia 750004, People's Republic of China
| | - Chuanhao Wang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Yazhao Zhu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Yanming Zhang
- School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, People's Republic of China
| | - Baobao Chen
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, People's Republic of China
| | - Yuelin Wu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, 100 Haiquan Road, Shanghai 201418, People's Republic of China.
| | - Jianzhong Yao
- School of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, Ningxia 750004, People's Republic of China; School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, People's Republic of China.
| | - Zhenyuan Miao
- School of Pharmacy, Second Military Medical University, 325 Guohe Road, Shanghai 200433, People's Republic of China.
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Lopez V, Schäkel L, Schuh HJM, Schmidt MS, Mirza S, Renn C, Pelletier J, Lee SY, Sévigny J, Alban S, Bendas G, Müller CE. Sulfated Polysaccharides from Macroalgae Are Potent Dual Inhibitors of Human ATP-Hydrolyzing Ectonucleotidases NPP1 and CD39. Mar Drugs 2021; 19:md19020051. [PMID: 33499103 PMCID: PMC7911304 DOI: 10.3390/md19020051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 12/25/2022] Open
Abstract
Extracellular ATP mediates proinflammatory and antiproliferative effects via activation of P2 nucleotide receptors. In contrast, its metabolite, the nucleoside adenosine, is strongly immunosuppressive and enhances tumor proliferation and metastasis. The conversion of ATP to adenosine is catalyzed by ectonucleotidases, which are expressed on immune cells and typically upregulated on tumor cells. In the present study, we identified sulfopolysaccharides from brown and red sea algae to act as potent dual inhibitors of the main ATP-hydrolyzing ectoenzymes, ectonucleotide pyrophosphatase/phosphodiesterase-1 (NPP1) and ecto-nucleoside triphosphate diphosphohydrolase-1 (NTPDase1, CD39), showing nano- to picomolar potency and displaying a non-competitive mechanism of inhibition. We showed that one of the sulfopolysaccharides tested as a representative example reduced adenosine formation at the surface of the human glioblastoma cell line U87 in a concentration-dependent manner. These natural products represent the most potent inhibitors of extracellular ATP hydrolysis known to date and have potential as novel therapeutics for the immunotherapy of cancer.
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Affiliation(s)
- Vittoria Lopez
- Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (V.L.); (L.S.); (S.M.); (C.R.); (S.-Y.L.)
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
| | - Laura Schäkel
- Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (V.L.); (L.S.); (S.M.); (C.R.); (S.-Y.L.)
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
| | - H. J. Maximilian Schuh
- Pharmaceutical & Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (H.J.M.S.); (M.S.S.); (G.B.)
| | - Michael S. Schmidt
- Pharmaceutical & Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (H.J.M.S.); (M.S.S.); (G.B.)
| | - Salahuddin Mirza
- Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (V.L.); (L.S.); (S.M.); (C.R.); (S.-Y.L.)
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
| | - Christian Renn
- Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (V.L.); (L.S.); (S.M.); (C.R.); (S.-Y.L.)
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
| | - Julie Pelletier
- Centre de Recherche du CHU de Québec—Université Laval, Québec City, QC G1V 4G2, Canada; (J.P.); (J.S.)
| | - Sang-Yong Lee
- Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (V.L.); (L.S.); (S.M.); (C.R.); (S.-Y.L.)
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
| | - Jean Sévigny
- Centre de Recherche du CHU de Québec—Université Laval, Québec City, QC G1V 4G2, Canada; (J.P.); (J.S.)
- Départment de Microbiologie-Infectiologie et d’Immunologie, Faculté de Médecine, Université Laval, Quebec City, QC G1V 0A6, Canada
| | - Susanne Alban
- Pharmaceutical Institute, Christian-Albrechts-University of Kiel, Gutenbergstraße 76, 24118 Kiel, Germany;
| | - Gerd Bendas
- Pharmaceutical & Cell Biological Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (H.J.M.S.); (M.S.S.); (G.B.)
| | - Christa E. Müller
- Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (V.L.); (L.S.); (S.M.); (C.R.); (S.-Y.L.)
- PharmaCenter Bonn, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany
- Correspondence: ; Tel.: +49-228-73-2301; Fax: +49-228-73-2567
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Longhi MS, Feng L, Robson SC. Targeting ectonucleotidases to treat inflammation and halt cancer development in the gut. Biochem Pharmacol 2021; 187:114417. [PMID: 33460629 DOI: 10.1016/j.bcp.2021.114417] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 12/30/2020] [Accepted: 01/11/2021] [Indexed: 01/28/2023]
Abstract
CD39 and CD73 control cell immunity by hydrolyzing proinflammatory ATP and ADP (CD39) into AMP, subsequently converted into anti-inflammatory adenosine (CD73). By regulating the balance between effector and regulatory cells, these ectonucleotidases promote immune homeostasis in acute and chronic inflammation; while also appearing to limit antitumor effector immunity in gut cancer. This manuscript focuses on the pivotal role of CD39 and CD73 ectonucleotidase function in shaping immune responses in the gut. We focus on those mechanisms deployed by these critical and pivotal ectoenzymes and the regulation in the setting of gastrointestinal tract infections, inflammatory bowel disease and tumors of the gastrointestinal tract. We will highlight translational and clinical implications of the latest and most innovative basic research discoveries of these important players of the purinergic signaling. Immunotherapeutic strategies that have been developed to either boost or control ectonucleotidase expression and activity in important disease settings are also reviewed and the in vivo effects discussed.
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Affiliation(s)
- Maria Serena Longhi
- Center for Inflammation Research, Department of Anesthesia, Critical Care & Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, 02215 Boston, USA.
| | - Lili Feng
- Center for Inflammation Research, Department of Anesthesia, Critical Care & Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, 02215 Boston, USA; Department of Hematology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong 250021, China
| | - Simon C Robson
- Center for Inflammation Research, Department of Anesthesia, Critical Care & Pain Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, 02215 Boston, USA; Division of Gastroenterology, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, 330 Brookline Avenue, 02215 Boston, USA.
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9
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Gallerano D, Ciminati S, Grimaldi A, Piconese S, Cammarata I, Focaccetti C, Pacella I, Accapezzato D, Lancellotti F, Sacco L, Caronna R, Melaiu O, Fruci D, D'Oria V, Manzi E, Sagnotta A, Parrino C, Coletta D, Peruzzi G, Terenzi V, Battisti A, Cassoni A, Fadda MT, Brozzetti S, Fazzi K, Grazi GL, Valentini V, Chirletti P, Polimeni A, Barnaba V, Timperi E. Genetically driven CD39 expression shapes human tumor-infiltrating CD8 + T-cell functions. Int J Cancer 2020; 147:2597-2610. [PMID: 32483858 DOI: 10.1002/ijc.33131] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/12/2020] [Accepted: 05/18/2020] [Indexed: 12/16/2022]
Abstract
In our study, we investigated the role of CD39 on tumor-infiltrating CD8+ T lymphocytes (CD8+ TILs) in colorectal, head and neck and pancreatic cancers. Partially confirming recent observations correlating the CD39 expression with T-cell exhaustion, we demonstrated a divergent functional activity in CD39+ CD8+ TILs. On the one hand, CD39+ CD8+ TILs (as compared to their CD39- counterparts) produced significantly lower IFN-γ and IL-2 amounts, expressed higher PD-1, and inversely correlated with perforin and granzyme B expression. On the other, they displayed a significantly higher proliferative capacity ex vivo that was inversely correlated with the PD-1 expression. Therefore, CD39+ CD8+ TILs, including those co-expressing the CD103 (a marker of T resident memory [TRM] cells), were defined as partially dysfunctional T cells that correlate with tumor patients with initial progression stages. Interestingly, our results identified for the first time a single nucleotide polymorphism (SNP rs10748643 A>G), as a genetic factor associated with CD39 expression in CD8+ TILs. Finally, we demonstrated that compounds inhibiting CD39-related ATPases improved CD39+ CD8+ T-cell effector function ex vivo, and that CD39+ CD8+ TILs displayed effective suppression function in vitro. Overall these data suggest that the SNP analysis may represent a suitable predictor of CD39+ CD8+ T-cell expression in cancer patients, and propose the modulation of CD39 as a new strategy to restore partially exhausted CD8+ TILs.
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MESH Headings
- Aged
- Aged, 80 and over
- Antineoplastic Combined Chemotherapy Protocols/pharmacology
- Antineoplastic Combined Chemotherapy Protocols/therapeutic use
- Apyrase/antagonists & inhibitors
- Apyrase/genetics
- Apyrase/metabolism
- Cells, Cultured
- Female
- Gene Expression Regulation, Neoplastic/immunology
- Humans
- Immune Checkpoint Inhibitors/pharmacology
- Immune Checkpoint Inhibitors/therapeutic use
- Lymphocytes, Tumor-Infiltrating/drug effects
- Lymphocytes, Tumor-Infiltrating/immunology
- Lymphocytes, Tumor-Infiltrating/metabolism
- Male
- Middle Aged
- Neoplasms/drug therapy
- Neoplasms/genetics
- Neoplasms/immunology
- Neoplasms/pathology
- Nivolumab/pharmacology
- Nivolumab/therapeutic use
- Polymorphism, Single Nucleotide
- Primary Cell Culture
- T-Lymphocytes, Cytotoxic/drug effects
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
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Affiliation(s)
- Daniela Gallerano
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Selina Ciminati
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Alessio Grimaldi
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Silvia Piconese
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
- Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci-Bolognetti, Rome, Italy
| | - Ilenia Cammarata
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Chiara Focaccetti
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Ilenia Pacella
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Daniele Accapezzato
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
| | - Francesco Lancellotti
- Dipartimento di Scienze Chirurgiche, "Sapienza" Università di Roma, Policlinico Umberto I, Rome, Italy
| | - Luca Sacco
- Dipartimento di Scienze Chirurgiche, "Sapienza" Università di Roma, Policlinico Umberto I, Rome, Italy
| | - Roberto Caronna
- Dipartimento di Scienze Chirurgiche, "Sapienza" Università di Roma, Policlinico Umberto I, Rome, Italy
| | - Ombretta Melaiu
- Department of Paediatric Haematology/Oncology and of Cell and Gene Therapy, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
- Department of Biology, University of Pisa, Pisa, Italy
| | - Doriana Fruci
- Department of Paediatric Haematology/Oncology and of Cell and Gene Therapy, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Valentina D'Oria
- Confocal Microscopy, Core Facility, Research Laboratories, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Emy Manzi
- Hepatobiliary Pancreatic Surgery IRCCS - Regina Elena National Cancer Institute, Rome, Italy
| | - Andrea Sagnotta
- Hepatobiliary Pancreatic Surgery IRCCS - Regina Elena National Cancer Institute, Rome, Italy
| | - Chiara Parrino
- Hepatobiliary Pancreatic Surgery IRCCS - Regina Elena National Cancer Institute, Rome, Italy
| | - Diego Coletta
- Hepatobiliary Pancreatic Surgery IRCCS - Regina Elena National Cancer Institute, Rome, Italy
| | - Giovanna Peruzzi
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome, Italy
| | - Valentina Terenzi
- Odontostomatogical and Maxillo-facial Sciences Department, Sapienza Università di Roma, Rome, Italy
| | - Andrea Battisti
- Odontostomatogical and Maxillo-facial Sciences Department, Sapienza Università di Roma, Rome, Italy
| | - Andrea Cassoni
- Odontostomatogical and Maxillo-facial Sciences Department, Sapienza Università di Roma, Rome, Italy
| | - Maria Teresa Fadda
- Odontostomatogical and Maxillo-facial Sciences Department, Sapienza Università di Roma, Rome, Italy
| | - Stefania Brozzetti
- Dipartimento di Chirurgia "Pietro Valdoni", "Sapienza" Università di Roma, Policlinico Umberto I, Rome, Italy
| | - Katia Fazzi
- Dipartimento di Chirurgia "Pietro Valdoni", "Sapienza" Università di Roma, Policlinico Umberto I, Rome, Italy
| | - Gian Luca Grazi
- Hepatobiliary Pancreatic Surgery IRCCS - Regina Elena National Cancer Institute, Rome, Italy
| | - Valentino Valentini
- Odontostomatogical and Maxillo-facial Sciences Department, Sapienza Università di Roma, Rome, Italy
| | - Piero Chirletti
- Dipartimento di Scienze Chirurgiche, "Sapienza" Università di Roma, Policlinico Umberto I, Rome, Italy
| | - Antonella Polimeni
- Odontostomatogical and Maxillo-facial Sciences Department, Sapienza Università di Roma, Rome, Italy
| | - Vincenzo Barnaba
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
- Laboratory Affiliated to Istituto Pasteur Italia-Fondazione Cenci-Bolognetti, Rome, Italy
| | - Eleonora Timperi
- Department of Internal Clinical, Anaesthesiologic and Cardiovascular Sciences, Sapienza University of Rome, Rome, Italy
- INSERM U932, Institut Curie, PSL Research University, Paris, France
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10
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Dang J, Xu Z, Xu A, Liu Y, Fu Q, Wang J, Huang F, Zheng Y, Qi G, Sun B, Bellanti JA, Kandalam U, Emam HA, Jarjour W, Zheng SG. Human gingiva-derived mesenchymal stem cells are therapeutic in lupus nephritis through targeting of CD39 -CD73 signaling pathway. J Autoimmun 2020; 113:102491. [PMID: 32565049 DOI: 10.1016/j.jaut.2020.102491] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 04/30/2020] [Accepted: 05/18/2020] [Indexed: 12/21/2022]
Abstract
Cell specific and cytokine targeted therapeutics have underperformed in systemic lupus erythematosus (SLE). Mesenchymal stem cells (MSCs) have emerged as a novel therapy to address the dysregulation in autoimmune diseases but also have limitations. Human gingiva derived MSCs (GMSCs) are superior in regulating immune responses. Here, we demonstrate that the adoptive transfer of GMSCs homes to and maintains in the kidney and has a robust therapeutic effect in a spontaneous lupus nephritis model. Specifically, GMSCs limits the development of autoantibodies as well as proteinuria, decreases the frequency of plasma cells and lupus nephritis histopathological scores by directly suppressing B cells activation, proliferation and differentiation. The blockage of CD39-CD73 pathway dramatically abrogates the suppressive capacities of GMSCs in vitro and in vivo and highlights the significance of this signaling pathway in SLE. Collectively, manipulation of GMSCs provides a promising strategy for the treatment of patients with SLE and other autoimmune diseases.
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Affiliation(s)
- Junlong Dang
- Department of Clinical Immunology, Third Affiliated Hospital at Sun Yat-sen University, Guangzhou, China; Division of Rheumatology, Department of Medicine, Penn State College of Medicine, Hershey, PA, USA
| | - Zhenjian Xu
- Division of Rheumatology, Department of Medicine, Penn State College of Medicine, Hershey, PA, USA; Department of Nephrology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, China
| | - Anping Xu
- Department of Nephrology, Sun Yat-sen Memorial Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yan Liu
- Department of Clinical Immunology, Third Affiliated Hospital at Sun Yat-sen University, Guangzhou, China
| | - Qingling Fu
- Otorhinolaryngology Department, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Julie Wang
- Division of Immunology and Rheumatology, Department of Internal Medicine, Ohio State University College of Medicine, USA
| | - Feng Huang
- Department of Clinical Immunology, Third Affiliated Hospital at Sun Yat-sen University, Guangzhou, China
| | - Yuejuan Zheng
- Center for Traditional Chinese Medicine and Immunology Research, School of Basic Medical Sciences, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| | - Guangying Qi
- Guangxi State Key Lab, Guilin College of Medicine, Guilin, China
| | - Boqing Sun
- Department of Allergy and Clinical Immunology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Joseph A Bellanti
- Departments of Pediatrics and Microbiology-Immunology, Georgetown University Medical Center, Washington DC, USA
| | - Umadevi Kandalam
- Department of Pediatric Dentistry, College of Dental Medicine, Nova Southeastern University, Davie, FL, USA
| | - Hany A Emam
- Department of Oral & Maxillofacial Surgery, The Ohio State University, Columbus, USA
| | - Wael Jarjour
- Division of Immunology and Rheumatology, Department of Internal Medicine, Ohio State University College of Medicine, USA
| | - Song Guo Zheng
- Division of Immunology and Rheumatology, Department of Internal Medicine, Ohio State University College of Medicine, USA.
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11
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Li XY, Moesta AK, Xiao C, Nakamura K, Casey M, Zhang H, Madore J, Lepletier A, Aguilera AR, Sundarrajan A, Jacoberger-Foissac C, Wong C, Dela Cruz T, Welch M, Lerner AG, Spatola BN, Soros VB, Corbin J, Anderson AC, Effern M, Hölzel M, Robson SC, Johnston RL, Waddell N, Smith C, Bald T, Geetha N, Beers C, Teng MWL, Smyth MJ. Targeting CD39 in Cancer Reveals an Extracellular ATP- and Inflammasome-Driven Tumor Immunity. Cancer Discov 2019; 9:1754-1773. [PMID: 31699796 DOI: 10.1158/2159-8290.cd-19-0541] [Citation(s) in RCA: 168] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 09/04/2019] [Accepted: 10/01/2019] [Indexed: 01/24/2023]
Abstract
We explored the mechanism of action of CD39 antibodies that inhibit ectoenzyme CD39 conversion of extracellular ATP (eATP) to AMP and thus potentially augment eATP-P2-mediated proinflammatory responses. Using syngeneic and humanized tumor models, we contrast the potency and mechanism of anti-CD39 mAbs with other agents targeting the adenosinergic pathway. We demonstrate the critical importance of an eATP-P2X7-ASC-NALP3-inflammasome-IL18 pathway in the antitumor activity mediated by CD39 enzyme blockade, rather than simply reducing adenosine as mechanism of action. Efficacy of anti-CD39 activity was underpinned by CD39 and P2X7 coexpression on intratumor myeloid subsets, an early signature of macrophage depletion, and active IL18 release that facilitated the significant expansion of intratumor effector T cells. More importantly, anti-CD39 facilitated infiltration into T cell-poor tumors and rescued anti-PD-1 resistance. Anti-human CD39 enhanced human T-cell proliferation and Th1 cytokine production and suppressed human B-cell lymphoma in the context of autologous Epstein-Barr virus-specific T-cell transfer. SIGNIFICANCE: Overall, these data describe a potent and novel mechanism of action of antibodies that block mouse or human CD39, triggering an eATP-P2X7-inflammasome-IL18 axis that reduces intratumor macrophage number, enhances intratumor T-cell effector function, overcomes anti-PD-1 resistance, and potentially enhances the efficacy of adoptive T-cell transfer.This article is highlighted in the In This Issue feature, p. 1631.
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Affiliation(s)
- Xian-Yang Li
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | | | - Christos Xiao
- Cancer Immunoregulation and Immunotherapy Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Kyohei Nakamura
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Mika Casey
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Haiyan Zhang
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Jason Madore
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Ailin Lepletier
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Amelia Roman Aguilera
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Ashmitha Sundarrajan
- Oncology and Cellular Immunology Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Celia Jacoberger-Foissac
- Cancer Immunoregulation and Immunotherapy Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | | | | | - Megan Welch
- Tizona Therapeutics, San Francisco, California
| | | | | | | | - John Corbin
- Tizona Therapeutics, San Francisco, California
| | - Ana C Anderson
- Harvard Medical School and Brigham and Women's Hospital, Boston, Massachusetts
| | - Maike Effern
- Unit of RNA Biology, Department of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, University of Bonn, Bonn, Germany
- Institute of Experimental Oncology (IEO), University Hospital Bonn, University of Bonn, Bonn, Germany
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Michael Hölzel
- Unit of RNA Biology, Department of Clinical Chemistry and Clinical Pharmacology, University Hospital Bonn, University of Bonn, Bonn, Germany
- Institute of Experimental Oncology (IEO), University Hospital Bonn, University of Bonn, Bonn, Germany
| | - Simon C Robson
- Departments of Medicine and Anesthesia, Beth Israel Deaconess Medical Center, Boston, Massachusetts
| | - Rebecca L Johnston
- Medical Genomics Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Nicola Waddell
- Medical Genomics Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Corey Smith
- Translational and Human Immunology Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Tobias Bald
- Oncology and Cellular Immunology Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Nishamol Geetha
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | | | - Michele W L Teng
- Cancer Immunoregulation and Immunotherapy Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Mark J Smyth
- Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston, Queensland, Australia.
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12
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Sade-Feldman M, Yizhak K, Bjorgaard SL, Ray JP, de Boer CG, Jenkins RW, Lieb DJ, Chen JH, Frederick DT, Barzily-Rokni M, Freeman SS, Reuben A, Hoover PJ, Villani AC, Ivanova E, Portell A, Lizotte PH, Aref AR, Eliane JP, Hammond MR, Vitzthum H, Blackmon SM, Li B, Gopalakrishnan V, Reddy SM, Cooper ZA, Paweletz CP, Barbie DA, Stemmer-Rachamimov A, Flaherty KT, Wargo JA, Boland GM, Sullivan RJ, Getz G, Hacohen N. Defining T Cell States Associated with Response to Checkpoint Immunotherapy in Melanoma. Cell 2018; 175:998-1013.e20. [PMID: 30388456 PMCID: PMC6641984 DOI: 10.1016/j.cell.2018.10.038] [Citation(s) in RCA: 1007] [Impact Index Per Article: 167.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 07/07/2018] [Accepted: 10/15/2018] [Indexed: 02/07/2023]
Abstract
Treatment of cancer has been revolutionized by immune checkpoint blockade therapies. Despite the high rate of response in advanced melanoma, the majority of patients succumb to disease. To identify factors associated with success or failure of checkpoint therapy, we profiled transcriptomes of 16,291 individual immune cells from 48 tumor samples of melanoma patients treated with checkpoint inhibitors. Two distinct states of CD8+ T cells were defined by clustering and associated with patient tumor regression or progression. A single transcription factor, TCF7, was visualized within CD8+ T cells in fixed tumor samples and predicted positive clinical outcome in an independent cohort of checkpoint-treated patients. We delineated the epigenetic landscape and clonality of these T cell states and demonstrated enhanced antitumor immunity by targeting novel combinations of factors in exhausted cells. Our study of immune cell transcriptomes from tumors demonstrates a strategy for identifying predictors, mechanisms, and targets for enhancing checkpoint immunotherapy.
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MESH Headings
- Animals
- Antibodies, Monoclonal, Humanized/immunology
- Antibodies, Monoclonal, Humanized/pharmacology
- Antigens, CD/immunology
- Antineoplastic Agents, Immunological/immunology
- Antineoplastic Agents, Immunological/pharmacology
- Apyrase/antagonists & inhibitors
- Apyrase/immunology
- CD8-Positive T-Lymphocytes/immunology
- Cell Line, Tumor
- Humans
- Immunotherapy/methods
- Leukocyte Common Antigens/antagonists & inhibitors
- Leukocyte Common Antigens/immunology
- Melanoma/immunology
- Melanoma/therapy
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- T Cell Transcription Factor 1/metabolism
- Transcriptome
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Affiliation(s)
- Moshe Sade-Feldman
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA
| | - Keren Yizhak
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Stacey L Bjorgaard
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - John P Ray
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Carl G de Boer
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Russell W Jenkins
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA; Department of Medical Oncology, Dana Farber Cancer Institute, Boston, MA, USA
| | - David J Lieb
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA
| | - Jonathan H Chen
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Pathology, Massachusetts General Hospital, HMS, Boston, MA, USA
| | - Dennie T Frederick
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Michal Barzily-Rokni
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Samuel S Freeman
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Biomedical Informatics, HMS, Boston, MA, USA
| | - Alexandre Reuben
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Paul J Hoover
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Brigham & Women's Hospital, Division of Rheumatology, Immunology and Allergy, Boston, MA, USA
| | - Alexandra-Chloé Villani
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA
| | - Elena Ivanova
- Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA; Belfer Center for Applied Cancer Science, Dana Farber Cancer Institute, Boston, MA, USA
| | - Andrew Portell
- Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA; Belfer Center for Applied Cancer Science, Dana Farber Cancer Institute, Boston, MA, USA
| | - Patrick H Lizotte
- Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA; Belfer Center for Applied Cancer Science, Dana Farber Cancer Institute, Boston, MA, USA
| | - Amir R Aref
- Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA; Belfer Center for Applied Cancer Science, Dana Farber Cancer Institute, Boston, MA, USA
| | - Jean-Pierre Eliane
- Department of Pathology, Massachusetts General Hospital, HMS, Boston, MA, USA
| | - Marc R Hammond
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Hans Vitzthum
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Shauna M Blackmon
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA
| | - Bo Li
- Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Virology, Harvard Medical School, Boston, MA, USA
| | | | - Sangeetha M Reddy
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Zachary A Cooper
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA; Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Cloud P Paweletz
- Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA; Belfer Center for Applied Cancer Science, Dana Farber Cancer Institute, Boston, MA, USA
| | - David A Barbie
- Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA
| | | | - Keith T Flaherty
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA
| | - Jennifer A Wargo
- Department of Surgical Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA; Department of Genomic Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Genevieve M Boland
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Surgery, Massachusetts General Hospital, HMS, Boston, MA, USA
| | - Ryan J Sullivan
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA
| | - Gad Getz
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Pathology, Massachusetts General Hospital, HMS, Boston, MA, USA; Department of Pathology, Harvard Medical School, Boston, MA, USA.
| | - Nir Hacohen
- Massachusetts General Hospital Cancer Center, Harvard Medical School (HMS), Boston, MA, USA; Broad Institute of Massachusetts Institute of Technology (MIT) and Harvard, Cambridge, MA, USA; Department of Medicine, Massachusetts General Hospital, HMS, Boston, MA, USA.
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13
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Mohammed Khan K, Salar U, Afzal S, Wadood A, Taha M, Perveen S, Khan H, Lecka J, Sévigny J, Iqbal J. Schiff bases of tryptamine as potent inhibitors of nucleoside triphosphate diphosphohydrolases (NTPDases): Structure-activity relationship. Bioorg Chem 2018; 82:253-266. [PMID: 30391856 DOI: 10.1016/j.bioorg.2018.10.046] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 10/18/2018] [Accepted: 10/23/2018] [Indexed: 01/10/2023]
Abstract
Overexpression of NTPDases leads to a number of pathological situations such as thrombosis, and cancer. Thus, effective inhibitors are required to combat these pathological situations. Different classes of NTPDase inhibitors are reported so far including nucleotides and their derivatives, sulfonated dyes such as reactive blue 2, suramin and its derivatives, and polyoxomatalates (POMs). Suramin is a well-known and potent NTPDase inhibitor, nonetheless, a range of side effects are also associated with it. Reactive blue 2 also had non-specific side effects that become apparent at high concentrations. In addition, most of the NTPDase inhibitors are high molecular weight compounds, always required tedious chemical steps to synthesize. Hence, there is still need to explore novel, low molecular weight, easy to synthesize, and potent NTPDase inhibitors. Keeping in mind the known NTPDase inhibitors with imine functionality and nitrogen heterocycles, Schiff bases of tryptamine, 1-26, were synthesized and characterized by spectroscopic techniques such as EI-MS, HREI-MS, 1H-, and 13C NMR. All the synthetic compounds were evaluated for the inhibitory avidity against activities of three major isoforms of NTPDases: NTPDase-1, NTPDase-3, and NTPDase-8. Cumulatively, eighteen compounds were found to show potent inhibition (Ki = 0.0200-0.350 μM) of NTPDase-1, twelve (Ki = 0.071-1.060 μM) of NTPDase-3, and fifteen compounds inhibited (Ki = 0.0700-4.03 μM) NTPDase-8 activity. As a comparison, the Kis of the standard inhibitor suramin were 1.260 ± 0.007, 6.39 ± 0.89 and 1.180 ± 0.002 μM, respectively. Kinetic studies were performed on lead compounds (6, 5, and 21) with human (h-) NTPDase-1, -3, and -8, and Lineweaver-Burk plot analysis showed that they were all competitive inhibitors. In silico study was conducted on compound 6 that showed the highest level of inhibition of NTPDase-1 to understand the binding mode in the active site of the enzyme.
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Affiliation(s)
- Khalid Mohammed Khan
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan; Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 1982, Dammam 31441, Saudi Arabia.
| | - Uzma Salar
- H. E. J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Saira Afzal
- Centre for Advanced Drug Research (CADR), Department of Pharmacy COMSATS Institute of Information Technology, Abbottabad, Pakistan
| | - Abdul Wadood
- Department of Biochemistry, Computational Medicinal Chemistry Laboratory, UCSS, Abdul Wali Khan University Mardan, Pakistan
| | - Muhammad Taha
- Department of Clinical Pharmacy, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman Bin Faisal University, P.O. Box 31441, Dammam, Saudi Arabia
| | - Shahnaz Perveen
- PCSIR Laboratories Complex, Karachi, Shahrah-e-Dr. Salimuzzaman Siddiqui, Karachi 75280, Pakistan
| | - Huma Khan
- Department of Biochemistry, Computational Medicinal Chemistry Laboratory, UCSS, Abdul Wali Khan University Mardan, Pakistan
| | - Joanna Lecka
- Département de Microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada; Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Jean Sévigny
- Département de Microbiologie-infectiologie et d'immunologie, Faculté de Médecine, Université Laval, Québec, QC G1V 0A6, Canada; Centre de Recherche du CHU de Québec-Université Laval, Québec, QC G1V 4G2, Canada
| | - Jamshed Iqbal
- Centre for Advanced Drug Research (CADR), Department of Pharmacy COMSATS Institute of Information Technology, Abbottabad, Pakistan.
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Kumar Tripathy M, Weeraratne G, Clark G, Roux SJ. Apyrase inhibitors enhance the ability of diverse fungicides to inhibit the growth of different plant-pathogenic fungi. Mol Plant Pathol 2017; 18:1012-1023. [PMID: 27392542 PMCID: PMC6638264 DOI: 10.1111/mpp.12458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/24/2016] [Accepted: 07/06/2016] [Indexed: 06/06/2023]
Abstract
A previous study has demonstrated that the treatment of Arabidopsis plants with chemical inhibitors of apyrase enzymes increases their sensitivity to herbicides. In this study, we found that the addition of the same or related apyrase inhibitors could potentiate the ability of different fungicides to inhibit the growth of five different pathogenic fungi in plate growth assays. The growth of all five fungi was partially inhibited by three commonly used fungicides: copper octanoate, myclobutanil and propiconazole. However, when these fungicides were individually tested in combination with any one of four different apyrase inhibitors (AI.1, AI.10, AI.13 or AI.15), their potency to inhibit the growth of five fungal pathogens was increased significantly relative to their application alone. The apyrase inhibitors were most effective in potentiating the ability of copper octanoate to inhibit fungal growth, and least effective in combination with propiconazole. Among the five pathogens assayed, that most sensitive to the fungicide-potentiating effects of the inhibitors was Sclerotinia sclerotiorum. Overall, among the 60 treatment combinations tested (five pathogens, four apyrase inhibitors, three fungicides), the addition of apyrase inhibitors increased significantly the sensitivity of fungi to the fungicide treatments in 53 of the combinations. Consistent with their predicted mode of action, inhibitors AI.1, AI.10 and AI.13 each increased the level of propiconazole retained in one of the fungi, suggesting that they could partially block the ability of efflux transporters to remove propiconazole from these fungi.
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Affiliation(s)
- Manas Kumar Tripathy
- Department of Molecular BiosciencesUniversity of Texas at AustinAustinTX78712USA
| | - Gayani Weeraratne
- Department of Molecular BiosciencesUniversity of Texas at AustinAustinTX78712USA
| | - Greg Clark
- Department of Molecular BiosciencesUniversity of Texas at AustinAustinTX78712USA
| | - Stanley J. Roux
- Department of Molecular BiosciencesUniversity of Texas at AustinAustinTX78712USA
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de Castro CCB, Costa PS, Laktin GT, de Carvalho PHD, Geraldo RB, de Moraes J, Pinto PLS, Couri MRC, Pinto PDF, Da Silva Filho AA. Cardamonin, a schistosomicidal chalcone from Piper aduncum L. (Piperaceae) that inhibits Schistosoma mansoni ATP diphosphohydrolase. Phytomedicine 2015; 22:921-928. [PMID: 26321741 DOI: 10.1016/j.phymed.2015.06.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/11/2015] [Accepted: 06/18/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Schistosomiasis is one of the world's major public health problems, and praziquantel (PZQ) is the only available drug to treat this neglected disease with an urgent demand for new drugs. Recent studies indicated that extracts from Piper aduncum L. (Piperaceae) are active against adult worms of Schistosoma mansoni, the major etiological agent of human schistosomiasis. PURPOSE We investigated the in vitro schistosomicidal activity of cardamonin, a chalcone isolated from the crude extract of P. aduncum. Also, this present work describes, for the first time, the S. mansoni ATP diphosphohydrolase inhibitory activity of cardamonin, as well as, its molecular docking with S. mansoni ATPDase1, in order to investigate its mode of inhibition. METHODS In vitro schistosomicidal assays and confocal laser scanning microscopy were used to evaluate the effects of cardamonin on adult schistosomes. Cell viability was measured by MTT assay, and the S. mansoni ATPase activity was determined spectrophotometrically. Identification of the cardamonin binding site and its interactions on S. mansoni ATPDase1 were made by molecular docking experiments. RESULTS A bioguided fractionation of the crude extract of P. aduncum was carried out, leading to identification of cardamonin as the active compound, along with pinocembrin and uvangoletin. Cardamonin (25, 50, and 100 µM) caused 100% mortality, tegumental alterations, and reduction of oviposition and motor activity of all adult worms of S. mansoni, without affecting mammalian cells. Confocal laser scanning microscopy showed tegumental morphological alterations and changes on the numbers of tubercles of S. mansoni worms in a dose-dependent manner. Cardamonin also inhibited S. mansoni ATP diphosphohydrolase (IC50 of 23.54 µM). Molecular docking studies revealed that cardamonin interacts with the Nucleotide-Binding of SmATPDase 1. The nature of SmATPDase 1-cardamonin interactions is mainly hydrophobic and hydrogen bonding. CONCLUSION This report provides evidence for the in vitro schistosomicidal activity of cardamonin and demonstrated, for the first time, that this chalcone is highly effective in inhibiting S. mansoni ATP diphosphohydrolase, opening the route to further studies of chalcones as prototypes for new S. mansoni ATP diphosphohydrolase inhibitors.
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Affiliation(s)
- Clarissa C B de Castro
- Faculdade de Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
| | - Poliana S Costa
- Faculdade de Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
| | - Gisele T Laktin
- Faculdade de Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
| | - Paulo H D de Carvalho
- Faculdade de Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
| | - Reinaldo B Geraldo
- Faculdade de Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
| | - Josué de Moraes
- Núcleo de Pesquisa em Doenças Negligenciadas (FACIG), 07025-000 Guarulhos, SP, Brazil
| | - Pedro L S Pinto
- Núcleo de Enteroparasitas, Instituto Adolfo Lutz, 01246-902 São Paulo, SP, Brazil
| | - Mara R C Couri
- Departamento de Química, Universidade Federal de Juiz de Fora, 36036-330 Juiz de Fora, MG, Brazil
| | - Priscila de F Pinto
- Instituto de Ciências Biológicas, Departamento de Bioquímica, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil
| | - Ademar A Da Silva Filho
- Faculdade de Farmácia, Departamento de Ciências Farmacêuticas, Universidade Federal de Juiz de Fora, 36036-900 Juiz de Fora, MG, Brazil.
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Deng S, Sun J, Zhao R, Ding M, Zhang Y, Sun Y, Wang W, Tan Y, Liu D, Ma X, Hou P, Wang M, Lu C, Shen X, Chen S. Populus euphratica APYRASE2 Enhances Cold Tolerance by Modulating Vesicular Trafficking and Extracellular ATP in Arabidopsis Plants. Plant Physiol 2015; 169:530-548. [PMID: 26224801 PMCID: PMC4577398 DOI: 10.1104/pp.15.00581] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 07/28/2015] [Indexed: 05/20/2023]
Abstract
Apyrase and extracellular ATP play crucial roles in mediating plant growth and defense responses. In the cold-tolerant poplar, Populus euphratica, low temperatures up-regulate APYRASE2 (PeAPY2) expression in callus cells. We investigated the biochemical characteristics of PeAPY2 and its role in cold tolerance. We found that PeAPY2 predominantly localized to the plasma membrane, but punctate signals also appeared in the endoplasmic reticulum and Golgi apparatus. PeAPY2 exhibited broad substrate specificity, but it most efficiently hydrolyzed purine nucleotides, particularly ATP. PeAPY2 preferred Mg(2+) as a cofactor, and it was insensitive to various, specific ATPase inhibitors. When PeAPY2 was ectopically expressed in Arabidopsis (Arabidopsis thaliana), cold tolerance was enhanced, based on root growth measurements and survival rates. Moreover, under cold stress, PeAPY2-transgenic plants maintained plasma membrane integrity and showed reduced cold-elicited electrolyte leakage compared with wild-type plants. These responses probably resulted from efficient plasma membrane repair via vesicular trafficking. Indeed, transgenic plants showed accelerated endocytosis and exocytosis during cold stress and recovery. We found that low doses of extracellular ATP accelerated vesicular trafficking, but high extracellular ATP inhibited trafficking and reduced cell viability. Cold stress caused significant increases in root medium extracellular ATP. However, under these conditions, PeAPY2-transgenic lines showed greater control of extracellular ATP levels than wild-type plants. We conclude that Arabidopsis plants that overexpressed PeAPY2 could increase membrane repair by accelerating vesicular trafficking and hydrolyzing extracellular ATP to avoid excessive, cold-elicited ATP accumulation in the root medium and, thus, reduced ATP-induced inhibition of vesicular trafficking.
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Affiliation(s)
- Shurong Deng
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Jian Sun
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Rui Zhao
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Mingquan Ding
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Yinan Zhang
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Yuanling Sun
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Wei Wang
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Yeqing Tan
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Dandan Liu
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Xujun Ma
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Peichen Hou
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Meijuan Wang
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Cunfu Lu
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Xin Shen
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
| | - Shaoliang Chen
- College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, People's Republic of China (S.D., R.Z., Y.Z., Y.S., W.W., Y.T., D.L., X.M., M.W., C.L., X.S., S.C.);College of Life Science, Jiangsu Normal University, Xuzhou 221116, People's Republic of China (J.S.);College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou 311300, People's Republic of China (M.D.); andNational Engineering Research Center for Information Technology in Agriculture, Beijing 100097, People's Republic of China (P.H.)
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Massalski C, Bloch J, Zebisch M, Steinebrunner I. The biochemical properties of the Arabidopsis ecto-nucleoside triphosphate diphosphohydrolase AtAPY1 contradict a direct role in purinergic signaling. PLoS One 2015; 10:e0115832. [PMID: 25822168 PMCID: PMC4379058 DOI: 10.1371/journal.pone.0115832] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 12/02/2014] [Indexed: 11/18/2022] Open
Abstract
The Arabidopsis E-NTPDase (ecto-nucleoside triphosphate diphosphohydrolase) AtAPY1 was previously shown to be involved in growth and development, pollen germination and stress responses. It was proposed to perform these functions through regulation of extracellular ATP signals. However, a GFP-tagged version was localized exclusively in the Golgi and did not hydrolyze ATP. In this study, AtAPY1 without the bulky GFP-tag was biochemically characterized with regard to its suggested role in purinergic signaling. Both the full-length protein and a soluble form without the transmembrane domain near the N-terminus were produced in HEK293 cells. Of the twelve nucleotide substrates tested, only three--GDP, IDP and UDP--were hydrolyzed, confirming that ATP was not a substrate of AtAPY1. In addition, the effects of pH, divalent metal ions, known E-NTPDase inhibitors and calmodulin on AtAPY1 activity were analyzed. AtAPY1-GFP extracted from transgenic Arabidopsis seedlings was included in the analyses. All three AtAPY1 versions exhibited very similar biochemical properties. Activity was detectable in a broad pH range, and Ca(2+), Mg(2+) and Mn(2+) were the three most efficient cofactors. Of the inhibitors tested, vanadate was the most potent one. Surprisingly, sulfonamide-based inhibitors shown to inhibit other E-NTPDases and presumed to inhibit AtAPY1 as well were not effective. Calmodulin stimulated the activity of the GFP-tagless membranous and soluble AtAPY1 forms about five-fold, but did not alter their substrate specificities. The apparent Km values obtained with AtAPY1-GFP indicate that AtAPY1 is primarily a GDPase. A putative three-dimensional structural model of the ecto-domain is presented, explaining the potent inhibitory potential of vanadate and predicting the binding mode of GDP. The found substrate specificity classifies AtAPY1 as a nucleoside diphosphatase typical of N-terminally anchored Golgi E-NTPDases and negates a direct function in purinergic signaling.
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Affiliation(s)
- Carolin Massalski
- Department of Biology, Technische Universität Dresden, Dresden, Germany
| | - Jeannine Bloch
- Department of Biology, Technische Universität Dresden, Dresden, Germany
| | - Matthias Zebisch
- Division of Structural Biology, University of Oxford, Oxford, United Kingdom
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Clark G, Darwin C, Mehta V, Jackobs F, Perry T, Hougaard K, Roux S. Effects of chemical inhibitors and apyrase enzyme further document a role for apyrases and extracellular ATP in the opening and closing of stomates in Arabidopsis. Plant Signal Behav 2013; 8:e26093. [PMID: 23989340 PMCID: PMC4106450 DOI: 10.4161/psb.26093] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 08/08/2013] [Indexed: 05/06/2023]
Abstract
In Arabidopsis leaves there is a bi-phasic dose-response to applied nucleotides; i.e., lower concentrations induce stomatal opening, while higher concentrations induce closure. Two mammalian purinoceptor antagonists, PPADS and RB2, block both nucleotide-induced stomatal opening and closing. These antagonists also partially block ABA-induced stomatal closure and light-induced stomatal opening. There are two closely related Arabidopsis apyrases, AtAPY1 and AtAPY2, which are both expressed in guard cells. Here we report that low levels of apyrase chemical inhibitors can induce stomatal opening in the dark, while apyrase enzyme blocks ABA-induced stomatal closure. We also demonstrate that high concentrations of ATP induce stomatal closure in the light. Application of ATPγS and chemical apyrase inhibitors at concentrations that have no effect on stomatal closure can lower the threshold for ABA-induced closure. The closure induced by ATPγS was not observed in gpa1-3 loss-of-function mutants. These results further confirm the role of extracellular ATP in regulating stomatal apertures.
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Affiliation(s)
- Greg Clark
- Section of Molecular Cell and Developmental Biology; University of Texas; Austin, TX USA
| | - Cameron Darwin
- 1Section of Molecular Cell and Developmental Biology; University of Texas; Austin, TX USA
| | - Viraj Mehta
- 1Section of Molecular Cell and Developmental Biology; University of Texas; Austin, TX USA
| | - Faith Jackobs
- 1Section of Molecular Cell and Developmental Biology; University of Texas; Austin, TX USA
| | - Tyler Perry
- 1Section of Molecular Cell and Developmental Biology; University of Texas; Austin, TX USA
| | - Katia Hougaard
- 1Section of Molecular Cell and Developmental Biology; University of Texas; Austin, TX USA
| | - Stan Roux
- Section of Molecular Cell and Developmental Biology; University of Texas; Austin, TX USA
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Liu X, Wu J, Clark G, Lundy S, Lim M, Arnold D, Chan J, Tang W, Muday GK, Gardner G, Roux SJ. Role for apyrases in polar auxin transport in Arabidopsis. Plant Physiol 2012; 160:1985-95. [PMID: 23071251 PMCID: PMC3510125 DOI: 10.1104/pp.112.202887] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 10/10/2012] [Indexed: 05/20/2023]
Abstract
Recent evidence indicates that extracellular nucleotides regulate plant growth. Exogenous ATP has been shown to block auxin transport and gravitropic growth in primary roots of Arabidopsis (Arabidopsis thaliana). Cells limit the concentration of extracellular ATP in part through the activity of ectoapyrases (ectonucleoside triphosphate diphosphohydrolases), and two nearly identical Arabidopsis apyrases, APY1 and APY2, appear to share this function. These findings, plus the fact that suppression of APY1 and APY2 blocks growth in Arabidopsis, suggested that the expression of these apyrases could influence auxin transport. This report tests that hypothesis. The polar movement of [(3)H]indole-3-acetic acid in both hypocotyl sections and primary roots of Arabidopsis seedlings was measured. In both tissues, polar auxin transport was significantly reduced in apy2 null mutants when they were induced by estradiol to suppress the expression of APY1 by RNA interference. In the hypocotyl assays, the basal halves of APY-suppressed hypocotyls contained considerably lower free indole-3-acetic acid levels when compared with wild-type plants, and disrupted auxin transport in the APY-suppressed roots was reflected by their significant morphological abnormalities. When a green fluorescent protein fluorescence signal encoded by a DR5:green fluorescent protein construct was measured in primary roots whose apyrase expression was suppressed either genetically or chemically, the roots showed no signal asymmetry following gravistimulation, and both their growth and gravitropic curvature were inhibited. Chemicals that suppress apyrase activity also inhibit gravitropic curvature and, to a lesser extent, growth. Taken together, these results indicate that a critical step connecting apyrase suppression to growth suppression is the inhibition of polar auxin transport.
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Milošević M, Petrović S, Veličković N, Grković I, Ignjatović M, Horvat A. ATP and ADP hydrolysis in cell membranes from rat myometrium. Mol Cell Biochem 2012; 371:199-208. [PMID: 22956447 DOI: 10.1007/s11010-012-1436-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Accepted: 08/25/2012] [Indexed: 11/26/2022]
Abstract
Extracellular nucleotides affect female reproductive functions, fertilization, and pregnancy. The aim of this study was to investigate biochemical characteristics of ATP and ADP hydrolysis and identify E-NTPDases in myometrial cell membranes from Wistar albino rats. The apparent K (m) values were 506.4 ± 62.1 and 638.8 ± 31.3 μM, with a calculated V (max) (app) of 3,973.0 ± 279.5 and 2,853.9 ± 79.8 nmol/min/mg for ATP and ADP, respectively. The enzyme activity described here has common properties characteristic for NTPDases: divalent cation dependence; alkaline pH optimum for both substrates, insensitivity to some of classical ATPase inhibitors (ouabain, oligomycine, theophylline, levamisole) and significant inhibition by suramine and high concentration of sodium azides (5 mM). According to similar apparent K(m) values for both substrates, the ATP/ADP hydrolysis ratio, and Chevillard competition plot, NTPDase1 is dominant ATP/ADP hydrolyzing enzyme in myometrial cell membranes. RT-PCR analysis revealed expression of three members of ectonucleoside triphosphate diphosphohydrolase family (NTPDase 1, 2, and 8) in rat uterus. These findings may further elucidate the role of NTPDases and ATP in reproductive physiology.
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Affiliation(s)
- Maja Milošević
- Department of Molecular Biology and Endocrinology, Institute of Nuclear Sciences VINČA, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia.
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Maia ACRG, Detoni ML, Porcino GN, Soares TV, do Nascimento Gusmão MA, Fessel MR, Marques MJ, Souza MA, Coelho PMZ, Estanislau JASG, da Costa Rocha MO, de Oliveira Santos M, Faria-Pinto P, Vasconcelos EG. Occurrence of a conserved domain in ATP diphosphohydrolases from pathogenic organisms associated to antigenicity in human parasitic diseases. Dev Comp Immunol 2011; 35:1059-1067. [PMID: 21527274 DOI: 10.1016/j.dci.2011.03.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2010] [Revised: 02/15/2011] [Accepted: 03/27/2011] [Indexed: 05/30/2023]
Abstract
A polypeptide (r78-117) belonging to the potato apyrase was identified as a conserved domain shared with apyrase-like proteins from distinct pathogenic organisms, and was obtained as a 6xHis tag polypeptide (r-Domain B). By ELISA, high IgG, and IgG1 and IgG2a subtypes levels were detected in BALB/c mice pre-inoculated with r-Domain B. In Schistosoma mansoni adult worm or Leishmania (V.) braziliensis promastigote preparation, anti-r-Domain B antibodies inhibit 22-72% of the phosphohydrolytic activities and when immobilized on Protein A-Sepharose immunoprecipitate 42-91% of them. Western blots of the immunoprecipitated resin-antibody-antigen complexes identified bands of mw similar to those predicted for parasite proteins. Total IgG and subclasses of patients with leishmaniasis or schistosomiasis exhibited cross-immunoreactivity with r-Domain B. Therefore, the domain B within both S. mansoni SmATPDase 2 (r156-195) and L. (V.) braziliensis NDPase (r83-122) are potentially involved in the host immune response, and also seem to be conserved during host and parasites co-evolution.
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Affiliation(s)
- Ana Carolina Ribeiro Gomes Maia
- Departamento de Bioquímica, Instituto de Ciências Biológicas, Universidade Federal de Juiz de Fora, Juiz de Fora, MG, Brazil
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22
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Clark G, Fraley D, Steinebrunner I, Cervantes A, Onyirimba J, Liu A, Torres J, Tang W, Kim J, Roux SJ. Extracellular nucleotides and apyrases regulate stomatal aperture in Arabidopsis. Plant Physiol 2011; 156:1740-53. [PMID: 21636723 PMCID: PMC3149927 DOI: 10.1104/pp.111.174466] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2011] [Accepted: 05/31/2011] [Indexed: 05/19/2023]
Abstract
This study investigates the role of extracellular nucleotides and apyrase enzymes in regulating stomatal aperture. Prior data indicate that the expression of two apyrases in Arabidopsis (Arabidopsis thaliana), APY1 and APY2, is strongly correlated with cell growth and secretory activity. Both are expressed strongly in guard cell protoplasts, as determined by reverse transcription-polymerase chain reaction and immunoblot analyses. Promoter activity assays for APY1 and APY2 show that expression of both apyrases correlates with conditions that favor stomatal opening. Correspondingly, immunoblot data indicate that APY expression in guard cell protoplasts rises quickly when these cells are moved from darkness into light. Both short-term inhibition of ectoapyrase activity by polyclonal antibodies and long-term suppression of APY1 and APY2 transcript levels significantly disrupt normal stomatal behavior in light. Stomatal aperture shows a biphasic response to applied adenosine 5'-[γ-thio]triphosphate (ATPγS) or adenosine 5'-[β-thio] diphosphate, with lower concentrations inducing stomatal opening and higher concentrations inducing closure. Equivalent concentrations of adenosine 5'-O-thiomonophosphate have no effect on aperture. Two mammalian purinoceptor inhibitors block ATPγS- and adenosine 5'-[β-thio] diphosphate-induced opening and closing and also partially block the ability of abscisic acid to induce stomatal closure and of light to induce stomatal opening. Treatment of epidermal peels with ATPγS induces increased levels of nitric oxide and reactive oxygen species, and genetically suppressing the synthesis of these agents blocks the effects of nucleotides on stomatal aperture. A luciferase assay indicates that treatments that induce either the closing or opening of stomates also induce the release of ATP from guard cells. These data favor the novel conclusion that ectoapyrases and extracellular nucleotides play key roles in regulating stomatal functions.
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Affiliation(s)
- Greg Clark
- Section of Molecular, Cell, and Developmental Biology, University of Texas, Austin, Texas 78712, USA
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23
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Luiz Oliveira Penido M, Resende DM, Vianello MA, Humberto da Silveira Bordin F, Jacinto AA, Dias WD, Montesano MA, Nelson DL, Marcos Zech Coelho P, Vasconcelos EG. A new series of schistosomicide drugs, the alkylaminoalkanethiosulfuric acids, partially inhibit the activity of Schistosoma mansoni ATP diphosphohydrolase. Eur J Pharmacol 2007; 570:10-7. [PMID: 17588561 DOI: 10.1016/j.ejphar.2007.05.028] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Revised: 05/03/2007] [Accepted: 05/15/2007] [Indexed: 10/23/2022]
Abstract
The effects of the alkylaminoalkanethiosulfuric acids (AAATs), new schistosomicidal drugs, on Schistosoma mansoni ATP diphosphohydrolase isoforms, members of the NTPDase family, were analyzed. Pre-incubation of worm adult tegument with AAATs derivatives, with small apolar alkyl groups and an apolar alkane portion of 6 or 8 carbon atoms linked to the amino group, inhibited ATPase activity with a Ki 100-1000 microM. Little inhibition (20%) was observed when ADP was the substrate. The 2-[(tert-butyl)amino]-1-ethanethiosulfuric acid (100 microM) which has a less lipophilic structure, inhibited 28% ATPase and 12% ADPase activities, suggesting that the lipophilicity, although important, is not the only requisite for enzyme activity inhibition. The N-(sec-butyl)-2-bromo-1-octanaminium bromide, which contains a bromide atom instead of thiosulphate, inhibited <10% of the enzyme activity, suggesting the involvement of cysteine residue(s) from S. mansoni ATP diphosphohydrolase isoforms in a mixed disulfide formation. Treatment of parasite tegument with 5 mM iodoacetamide or 1 mM dithiothreitol protected ATPase and ADPase activities against inhibition by AAATs, corroborating the participation of disulfide interchange in the AAATs mechanism. Since S. mansoni ATP diphosphohydrolase isoforms and potato apyrase share structural similarities, the latter enzyme was also tested. ADPase activity from potato apyrase was inhibited by 55%, showing a higher sensitivity to 1 mM AAATs than that shown by ADPase activity from the tegument, while the ATPase activities from both samples showed similar inhibition levels. Furthermore, sulfhydryl reagents protected potato apyrase activity. Therefore, it is possible that both soluble S. mansoni ATP diphosphohydrolase and membrane-associated isoforms are targets for the AAATs.
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Lévesque SA, Lavoie ÉG, Lecka J, Bigonnesse F, Sévigny J. Specificity of the ecto-ATPase inhibitor ARL 67156 on human and mouse ectonucleotidases. Br J Pharmacol 2007; 152:141-50. [PMID: 17603550 PMCID: PMC1978278 DOI: 10.1038/sj.bjp.0707361] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND AND PURPOSE ARL 67156, 6-N,N-Diethyl-D-beta-gamma-dibromomethylene adenosine triphosphate, originally named FPL 67156, is the only commercially available inhibitor of ecto-ATPases. Since the first report on this molecule, various ectonucleotidases responsible for the hydrolysis of ATP at the cell surface have been cloned and characterized. In this work, we identified the ectonucleotidases inhibited by ARL 67156. EXPERIMENTAL APPROACH The effect of ARL 67156 on recombinant NTPDase1, 2, 3 & 8 (mouse and human), NPP1, NPP3 and ecto-5'-nucleotidase (human) have been evaluated. The inhibition of the activity of NTPDases (using the following substrates: ATP, ADP, UTP), NPPs (pnp-TMP, Ap(3)A) and ecto-5'-nucleotidase (AMP) was measured by colorimetric or HPLC assays. KEY RESULTS ARL 67156 was a weak competitive inhibitor of human NTPDase1, NTPDase3 and NPP1 with K(i) of 11+/-3, 18+/-4 and 12+/-3 microM, respectively. At concentrations used in the literature (50-100 microM), ARL 67156 partially but significantly inhibited the mouse and human forms of these enzymes. NTPDase2, NTPDase8, NPP3 and ecto-5'-nucleotidase activities were less affected. Importantly, ARL 67156 was not hydrolysed by either human NTPDase1, 2, 3, 8, NPP1 or NPP3. CONCLUSIONS AND IMPLICATIONS In cell environments where NTPDase1, NTPDase3, NPP1 or mouse NTPDase8 are present, ARL 67156 would prolong the effect of endogenously released ATP on P2 receptors. However, it does not block any ectonucleotidases efficiently when high concentrations of substrates are present, such as in biochemical, pharmacological or P2X(7) assays. In addition, ARL 67156 is not an effective inhibitor of NTPDase2, human NTPDase8, NPP3 and ecto-5'-nucleotidase.
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Affiliation(s)
- S A Lévesque
- Centre de Recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Québec, Université Laval Québec, QC, Canada
| | - É G Lavoie
- Centre de Recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Québec, Université Laval Québec, QC, Canada
| | - J Lecka
- Centre de Recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Québec, Université Laval Québec, QC, Canada
| | - F Bigonnesse
- Centre de Recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Québec, Université Laval Québec, QC, Canada
| | - J Sévigny
- Centre de Recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Québec, Université Laval Québec, QC, Canada
- Author for correspondence:
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Vuaden FC, de Paula Cognato G, Bonorino C, Bogo MR, de Freitas Sarkis JJ, Bonan CD. Lipopolysaccharide alters nucleotidase activities from lymphocytes and serum of rats. Life Sci 2007; 80:1784-91. [PMID: 17363004 DOI: 10.1016/j.lfs.2007.02.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2006] [Revised: 01/24/2007] [Accepted: 02/07/2007] [Indexed: 11/21/2022]
Abstract
ATP exerts a proinflammatory role and induces cytokine release by acting at P2X(7) receptors. The product of ATP hydrolysis is the nucleoside adenosine, an important immunomodulator. The main source of extracellular adenosine is the hydrolysis of extracellular ATP by a group of ecto-enzymes: ENTPDase family, NPP family and ecto-5'-nucleotidase. Considering the role of ATP and adenosine in inflammatory processes, we investigated the effect of lipopolysaccharide on ectonucleotidases activities and expression in lymphocytes from mesenteric lymph nodes and serum of rats, in order to better understand the involvement of extracellular nucleotide hydrolysis in an endotoxemia model. We observed significant changes on nucleotidase activities from lymphocytes and serum of rats after in vitro and in vivo exposure to LPS. In vitro results have shown an increase on nucleotide hydrolysis in lymphocytes and a decrease on the enzyme activity of NPP in blood serum. In vivo, we observed an increase on nucleotide hydrolysis in lymphocytes and a decrease in the hydrolysis of all nucleotides tested in blood serum. After 24 and 48 h of LPS treatment, there was a reduction in NTPDase1, 2, 3 and ecto-5'-nucleotidase transcripts. These results suggest that there is a time-dependent enhancement of extracellular nucleotides metabolism in lymphocytes and blood serum after the induction of an endotoxemic model. The changes observed suggest that these enzymes can act in the regulation of extracellular nucleosides and nucleotides in a model able to trigger inflammatory process.
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Affiliation(s)
- Fernanda Cenci Vuaden
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600, Anexo, 90035-003, Porto Alegre, RS, Brazil
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Abstract
Dr Simon C Robson (Harvard University) was interviewed by Emma Quigley (Commissioning Editor, Expert Opinion) on 14th August 2006. Born in the UK, Dr Simon Robson obtained his MB, ChB from the University of Cape Town, South Africa in 1978 and his PhD in Immunology in 1989. He worked in both South Africa and the UK before moving to the USA in 1994. Now an Associate Professor in Medicine at Harvard University, Dr Robson is conducting research dealing with the vascular biology of transplantation and specifically focussing on how endothelial and immune cell purinergic signalling is modulated by ecto-nucleotidases of the CD39 family (ecto-enzymes that hydrolyse extracellular nucleotides to generate nucleosides). In several studies funded by the NIH, ROTRF and other agencies, Dr Robson has been researching genomics, proteomics and the biology of CD39 in models of inflammation and immunity. Dr Robson has published > 200 papers and is on the Editorial Boards of many well-respected journals, including Expert Opinion on Therapeutic Targets.
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27
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Sharon E, Lévesque SA, Munkonda MN, Sévigny J, Ecke D, Reiser G, Fischer B. Fluorescent N2,N3-epsilon-adenine nucleoside and nucleotide probes: synthesis, spectroscopic properties, and biochemical evaluation. Chembiochem 2006; 7:1361-74. [PMID: 16871613 PMCID: PMC5218839 DOI: 10.1002/cbic.200600070] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2006] [Indexed: 11/06/2022]
Abstract
N1,N(6)-ethenoadenine, epsilon-A, nucleos(t)ides have been previously applied as fluorescent probes in numerous biochemical systems. However, these epsilon-A analogues lack the H-bonding capability of adenine. To improve the fluorescence characteristics while preserving the H-bonding pattern required for molecular recognition, we designed a novel probe: N(2),N3-etheno-adenosine, (N(2),N3-epsilon-A). Here, we describe four novel syntheses of the target epsilon-nucleoside and related analogues. These methods are short, facile, and provide the product regiospecifically. In addition, we report the absorption and emission spectra of N(2),N3-epsilon-A and the dependence of the spectral features on the pH and polarity of the medium. Specifically, maximum emission of N(2),N3-epsilon-A in water is observed at 420 nm (phi=0.03, excitation at 290 nm). The biochemical relevance of the new probe was evaluated with respect to the P2Y(1) receptor and NTPDases 1 and 2. N(2),N3-epsilon-ATP was found to be almost equipotent with ATP at the P2Y(1) receptor and was hydrolyzed by NTPDases 1 and 2 at about 80 % of the rate of ATP. Furthermore, protein binding does not seem to shift the fluorescence of N(2),N3-epsilon-ATP. Based on the fluorescence and full recognition by ATP-binding proteins, we propose N(2),N3-epsilon-ATP and related nucleo(s)tides as unique probes for the investigation of adenine nucleo(s)tide-binding proteins as well as for other biochemical applications.
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Affiliation(s)
- Einat Sharon
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900 (Israel)
| | - Sébastien A. Lévesque
- Centre de Recherche en Rhumatologie et Immunologie, Université Laval, 2705 boulevard Laurier, T1-49, Sainte-Foy, Québec, G1V 4G2 (Canada)
| | - Mercedes N. Munkonda
- Centre de Recherche en Rhumatologie et Immunologie, Université Laval, 2705 boulevard Laurier, T1-49, Sainte-Foy, Québec, G1V 4G2 (Canada)
| | - Jean Sévigny
- Centre de Recherche en Rhumatologie et Immunologie, Université Laval, 2705 boulevard Laurier, T1-49, Sainte-Foy, Québec, G1V 4G2 (Canada)
| | - Denise Ecke
- Institute for Neurobiochemistry, Faculty of Medicine, Otto von Guericke University, Leipzigerstrasse 44, 39120 Magdeburg (Germany)
| | - Georg Reiser
- Institute for Neurobiochemistry, Faculty of Medicine, Otto von Guericke University, Leipzigerstrasse 44, 39120 Magdeburg (Germany)
| | - Bilha Fischer
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900 (Israel)
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da Silva AC, Balz D, de Souza JBD, Morsch VM, Corrêa MC, Zanetti GD, Manfron MP, Schetinger MRC. Inhibition of NTPDase, 5'-nucleotidase, Na+/K+-ATPase and acetylcholinesterase activities by subchronic treatment with Casearia sylvestris. Phytomedicine 2006; 13:509-14. [PMID: 16785042 DOI: 10.1016/j.phymed.2005.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2004] [Accepted: 01/11/2005] [Indexed: 05/10/2023]
Abstract
The aqueous extract of Casearia sylvestris was tested in cortical membrane preparations. C. sylvestris was obtained commercially from two different sources, designated as Sample A and Sample B. The enzymes studied in this work were NTPDase-like, 5'-Nucleotidase, Na(+)/K(+)-ATPase and acetylcholinesterase (AChE). Adult rats received aqueous extracts from C. sylvestris in a dose of 20mg/kg body wt. daily for a 75-day-period, by oral administration (gavage). Our study showed that this treatment caused an inhibition of NTPDase-like activity with both, ATP (19.41% with Sample A and 25.03% with Sample B) and ADP (41.57% with Sample A and 31.20% with Sample B) as substrates. This treatment also caused an inhibition of 5'-nucleotidase activity (28.34% with Sample A and 31.46% with Sample B) and Na(+)/K(+)-ATPase (25.08% with Sample A and 24.81% with Sample B). The rate of acetylcholine degradation was reduced, as shown by the inhibition of AChE (31.65% and 26.74%, Samples A and B, respectively). These results suggest that extracts of C. sylvestris can cause neurochemical alterations in the purinergic and cholinergic systems of the central nervous system.
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Affiliation(s)
- A C da Silva
- Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil
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Horvat A, Orlić T, Banjac A, Momić T, Petrović S, Demajo M. Inhibition of rat brain ecto-atpase activity by various drugs. Gen Physiol Biophys 2006; 25:91-105. [PMID: 16714778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
The in vitro effect of digoxin, verapamil, propranolol, carbamazepine, diazepam and promethazine were investigated on the ecto-ATPase activity of synaptosomal plasma membranes from the rat brain. ATP hydrolyzing activities of the enzyme were not affected by digoxin while the use of all other drugs resulted in significant and dose-dependent ihibition in ATP hydrolysis. According to values of IC(50) and K(iapp), the order of inhibitory potency of the drugs applied was: diazepam > promethazine > verapamil > propranolol >> carbamazepine. Kinetic analysis of the nature of the ATPase inhibition revealed that it resulted from a direct action of drugs on the enzyme protein. The aim of the present study was to determine the potential neuromodulatory side effects of the drugs investigated. The results achieved indicated that all investigated drugs, except digoxin, may modulate neuronal activities via the purinergic receptors P2 by increasing extracellular concentrations of ATP as a consequence of inhibition of the ecto-ATPase activity. Our findings indicate that it may be useful to take into consideration the possible side effects of the investigated drugs, when they are used in treatment of different pathologies, particularly in the treatment of epilepsy by carbamazepine and diazepam.
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Affiliation(s)
- A Horvat
- Laboratory for Molecular Biology and Endocrinology, Vinca Institute of Nuclear Sciences, Belgrade, Serbia and Montenegro.
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30
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Fonseca FV, Fonseca de Souza AL, Mariano AC, Entringer PF, Gondim KC, Meyer-Fernandes JR. Trypanosoma rangeli: characterization of a Mg-dependent ecto ATP-diphosphohydrolase activity. Exp Parasitol 2005; 112:76-84. [PMID: 16289087 DOI: 10.1016/j.exppara.2005.09.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2005] [Revised: 09/08/2005] [Accepted: 09/20/2005] [Indexed: 01/05/2023]
Abstract
In this work we describe the ability of living Trypanosoma rangeli to hydrolyze extracellular ATP. In these intact parasites whose viability was assessed before and after the reactions by motility and by Trypan blue dye exclusion, there was a low level of ATP hydrolysis in the absence of any divalent metal (1.53+/-0.12 nmol P(i)/h x 10(7) cells). The ATP hydrolysis was stimulated by MgCl(2) and the Mg-dependent ecto-ATPase activity was 5.24+/-0.64 nmol P(i)/h x 10(7) cells. The Mg-dependent ecto-ATPase activity was linear with cell density and with time for at least 60 min. This stimulatory effect on the ATP hydrolysis was also observed when MgCl(2) was replaced by MnCl(2), but not by CaCl(2), SrCl(2), and ZnCl(2). The apparent K(m) for Mg-ATP2- was 0.53+/-0.11 mM. The optimum pH for the T. rangeli Mg-dependent ecto-ATPase activity lies in the alkaline range. This ecto-ATPase activity was insensitive to inhibitors of other ATPase and phosphatase activities, such as oligomycin, sodium azide, bafilomycin A1, ouabain, furosemide, vanadate, molybdate, sodium fluoride, tartrate, and levamizole. To confirm that this Mg-dependent ATPase was an ecto-ATPase, we used an impermeant inhibitor, DIDS (4, 4'-diisothiocyanostylbene 2'-2'-disulfonic acid) as well as suramin, an antagonist of P2 purinoreceptors and inhibitor of some ecto-ATPases. These two reagents inhibited the Mg(2+)-dependent ATPase activity in a dose-dependent manner. This ecto-ATPase activity was stimulated by carbohydrates involved in the attachment/invasion of salivary glands of Rhodnius prolixus and by lipophorin, an insect lipoprotein circulating in the hemolymph.
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Affiliation(s)
- Fábio Vasconcelos Fonseca
- Departamento de Bioquímica Médica, Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, CCS, Bloco H, Cidade Universitária, Ilha do Fundão, 21541-590, Rio de Janeiro, RJ, Brazil
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31
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Horner S, Menke K, Hildebrandt C, Kassack MU, Nickel P, Ullmann H, Mahaut-Smith MP, Lambrecht G. The novel suramin analogue NF864 selectively blocks P2X1 receptors in human platelets with potency in the low nanomolar range. Naunyn Schmiedebergs Arch Pharmacol 2005; 372:1-13. [PMID: 16158305 DOI: 10.1007/s00210-005-1085-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Accepted: 07/14/2005] [Indexed: 11/28/2022]
Abstract
The role of ATP-stimulated P2X1 receptors in human platelets is still unclear. They may act alone or in synergy with other pathways, such as P2Y1 or P2Y12 receptors, to accelerate and enhance calcium mobilisation, shape change and aggregation. To date very few pharmacological means of selectively inhibiting platelet P2X1 receptors have been described, although recent work has shown that suramin is a useful lead compound for the development of high-affinity P2X1 antagonists. We therefore investigated the effects of a series of bivalent and tetravalent suramin analogues on alphabeta meATP (P2X1 receptors)-induced or ADP (P2Y1 receptors)-induced intracellular calcium increases and shape change, as well as on ADP-induced aggregation (P2Y1 & P2Y12 receptors) in human platelets. Changes in intracellular calcium were measured using standard fluorescence techniques, while shape change and aggregation were determined by turbidimetry. The novel tetravalent compound NF864 (8,8',8'',8'''-(carbonylbis(imino-5,1,3-benzenetriyl-bis(carbonylimino)))tetrakis-naphthalene-1,3,5-trisulfonic acid-dodecasodium salt) proved to be the most potent platelet P2X1 antagonist reported to date, blocking alphabeta meATP-induced Ca2+ increases and shape change in a concentration-dependent manner, with a pA2 of 8.17 and 8.49, respectively. The ability to inhibit the platelet P2X1 receptor displayed the following order : NF864 > NF449 > or = NF110 > NF023 = MK-HU1 = suramin. A different antagonistic profile was observed for ADP-induced Ca2+ increases, shape change and aggregation; however, overall four compounds showed sufficient ability to selectively inhibit P2X1 responses, with the order NF110 > NF449 > or = NF864 > or = MK-HU1. Therefore, these compounds should prove useful tools for investigating the functional significance of platelet P2X1 receptors in thrombosis and haemostasis, NF864 being the most promising compound.
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Affiliation(s)
- Susanne Horner
- Department of Pharmacology, University of Frankfurt, Marie-Curie-Strasse 9, 60439, Frankfurt (Main), Germany
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Reigada D, Lu W, Zhang X, Friedman C, Pendrak K, McGlinn A, Stone RA, Laties AM, Mitchell CH. Degradation of extracellular ATP by the retinal pigment epithelium. Am J Physiol Cell Physiol 2005; 289:C617-24. [PMID: 15857904 DOI: 10.1152/ajpcell.00542.2004] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Stimulation of ATP or adenosine receptors causes important physiological changes in retinal pigment epithelial (RPE) cells that may influence their relationship to the adjacent photoreceptors. While RPE cells have been shown to release ATP, the regulation of extracellular ATP levels and the production of dephosphorylated purines is not clear. This study examined the degradation of ATP by RPE cells and the physiological effects of the adenosine diphosphate (ADP) that result. ATP was readily broken down by both cultured human ARPE-19 cells and the apical membrane of fresh bovine RPE cells. The compounds ARL67156 and betagamma-mATP inhibited this degradation in both cell types. RT-PCR analysis of ARPE-19 cells found mRNA message for multiple extracellular degradative enzymes; ectonucleotide pyrophosphatase/phosphodiesterase eNPP1, eNPP2, and eNPP3; the ectoATPase ectonucleoside triphosphate diphosphohydrolase NTPDase2, NTPDase3, and some message for NTPDase1. Considerable levels of ADP bathed RPE cells, consistent with a role for NTPDase2. ADP and ATP increased levels of intracellular Ca(2+). Both responses were inhibited by thapsigargin and P2Y(1) receptor inhibitor MRS 2179. Message for both P2Y(1) and P2Y(12) receptors was detected in ARPE-19 cells. These results suggest that extracellular degradation of ATP in subretinal space can result in the production of ADP. This ADP can stimulate P2Y receptors and augment Ca(2+) signaling in the RPE.
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Affiliation(s)
- David Reigada
- Dept. of Physiology, University of Pennsylvania, Philadelphia, PA 19104-6085, USA
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Eriksson J, Gharizadeh B, Nourizad N, Nyrén P. 7-Deaza-2'-deoxyadenosine-5'-triphosphate as an alternative nucleotide for the pyrosequencing technology. Nucleosides Nucleotides Nucleic Acids 2005; 23:1583-94. [PMID: 15620097 DOI: 10.1081/ncn-200031402] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A new adenosine nucleotide analog suitable for the Pyrosequencing method is presented. The new analog, 7-deaza-2'-deoxyadenosine-5'-triphosphate (c7dATP), has virtually the same low substrate specificity for luciferase as the currently used analog, 2'-deoxyadenosine-5'-O-(1-thiotriphosphate) (dATPalphaS). The inhibitory effect dATPalphaS displays on the nucleotide degrading activity of apyrase was reduced significantly by substituting the c7dATP for the dATPalphaS. Both analogs show high stability after long time storage at + 8 degrees C. Furthermore, with the new nucleotide a read length of up to 100 bases was obtained for several templates from fungi, bacteria and viruses.
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Affiliation(s)
- Jonas Eriksson
- Department of Biotechnology, SCFAB (Stockholm Centre for Physics, Astronomy, and Biotechnology), KTH (Royal Institute of Technology), Stockholm, Sweden
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Buffon A, Ribeiro VB, Fürstenau CR, Battastini AMO, Sarkis JJF. Acetylsalicylic acid inhibits ATP diphosphohydrolase activity by platelets from adult rats. Clin Chim Acta 2005; 349:53-60. [PMID: 15469855 DOI: 10.1016/j.cccn.2004.06.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2004] [Revised: 05/31/2004] [Accepted: 06/01/2004] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND METHODS The in vitro effect of the nonsteroidal anti-inflammatory drug, acetylsalicylic acid (ASA), on the extracellular adenine nucleotide hydrolysis by intact rat blood platelets was studied. RESULTS Our results demonstrate that aspirin, at final concentrations of 2.0 and 3.0 mM, inhibits ATP extracellular hydrolysis in vitro by approximately 17% and 21%, respectively. Aspirin, at a final concentration of 3.0 mM, also inhibited in vitro extracellular ADP hydrolysis by approximately 41%. The same concentrations of this drug, however, did not alter AMP hydrolysis by intact rat blood platelets under similar assay conditions. The kinetic analysis demonstrated that the inhibition of ADP and ATP hydrolysis by aspirin in rat platelets is of the uncompetitive type. CONCLUSION In this study, we demonstrated an inhibitory effect of ASA upon E-NTPDase 3 activity of platelets from adult rats and discussed the significance of our findings.
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Affiliation(s)
- Andréia Buffon
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600, ANEXO, CEP Porto Alegre, RS, Brazil.
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Oses JP, Cardoso CM, Germano RA, Kirst IB, Rücker B, Fürstenau CR, Wink MR, Bonan CD, Battastini AMO, Sarkis JJF. Soluble NTPDase: An additional system of nucleotide hydrolysis in rat blood serum. Life Sci 2004; 74:3275-84. [PMID: 15094327 DOI: 10.1016/j.lfs.2003.11.020] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2003] [Accepted: 11/12/2003] [Indexed: 11/19/2022]
Abstract
The participation of a nucleoside triphosphate diphosphohydrolase in the nucleotide hydrolysis by rat blood serum was evaluated. Nucleoside triphosphate diphosphohydrolase and phosphodiesterase are enzymes possibly involved in ATP and ADP hydrolysis. The specific activity of the phosphodiesterase activity (using thymidine 5'-monophosphate p-nitrophenyl ester as substrate) was 4.92 +/- 0.73 (mean +/- SD, n = 10) nmol p-nitrophenol.min(-1).mg(-1) protein and the specific activities for ATP and ADP were 1.31 +/- 0.37 (mean +/- SD, n = 7) and 1.36 +/- 0.25 (mean +/- SD, n = 5) nmol Pi.min(-1).mg(-1) protein, respectively. A competition plot demonstrated that ATP and ADP hydrolysis occurs at the same active site. The effect of suramin and phenylalanine on ATP, ADP and thymidine 5'-monophosphate p-nitrophenyl ester hydrolysis was investigated. The results were opposite considering the hydrolysis of ATP and ADP and that of the substrate marker for the enzyme phosphodiesterase. These results are indicative of the presence of, at least, two enzymes participating in the serum nucleotide hydrolysis. The presence of cAMP did not affect the hydrolysis velocity of ATP and ADP, while thymidine 5'-monophosphate p-nitrophenyl ester hydrolysis was inhibited by cAMP by approximately 47%, suggesting that the hydrolysis of the ATP and ADP, under our assay conditions, occurs at a different site from the phosphodiesterase site. Both enzyme activities, in the rat blood serum, may be involved in the modulation of the nucleotide/nucleoside ratio in the circulation, serving an in vivo homeostatic and antithrombotic function. In addition, the phosphodiesterase may act on DNA or RNA liberated upon tissue injury and/or cell death.
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Affiliation(s)
- Jean Pierre Oses
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Halbfinger E, Gorochesky K, Lévesque SA, Beaudoin AR, Sheihet L, Margel S, Fischer B. Photoaffinity labeling on magnetic microspheres (PALMm) methodology for topographic mapping: preparation of PALMm reagents and demonstration of biochemical relevance. Org Biomol Chem 2003; 1:2821-32. [PMID: 12968331 DOI: 10.1039/b303425a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Photoaffinity labeling (PAL) is a technique widely used for identifying the binding-site within proteins. Although the classic method is both versatile and powerful, it suffers significant disadvantages, such as the need to radiolabel the PAL ligand, and the need to conduct highly complicated separations of both the labeled protein and the labeled peptides derived from it. Here, we propose a novel and universal methodology--Photo-Affinity Labeling on Magnetic microspheres (PALMm) designed to simplify and shorten the PAL protocol. In this context, we describe the preparation of PALMm reagents and the evaluation of their biochemical relevance regarding two ATP-binding enzymes: hexokinase and apyrase.
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Affiliation(s)
- Efrat Halbfinger
- Department of Chemistry, Gonda-Goldschmied Medical Research Center, Bar-Ilan University, Ramat-Gan 52900, Israel
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Rücker B, Oses JP, Kirst IB, Berti SL, Bonan CD, Battastini AMO, Sarkis JJF. Effects of phenylalanine and phenylpyruvate on ATP-ADP hydrolysis by rat blood serum. Amino Acids 2003; 24:383-8. [PMID: 12768500 DOI: 10.1007/s00726-002-0345-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The nucleotide (ATP-ADP)/nucleoside (adenosine) ratio in the circulation can modulate the processes of vasoconstriction, vasodilatation and platelet aggregation. The main objective of the present study with rat blood serum was to evaluate the possibility of changes in nucleotide hydrolysis by phenylalanine (Phe) and phenylpyruvate (PP), the levels of which could increase in the circulation of individuals with phenylketonuria. Results demonstrated that Phe in the range 1.0-5.0 mM inhibited the ADP hydrolysis by rat serum. The effect of inhibition by Phe on ATP hydrolysis appeared only at a concentration of 5.0 mM. PP had no significant effect upon nucleotide hydrolysis. Kinetic analysis indicated that the inhibition of ADP and ATP hydrolysis by Phe in rat blood serum is uncompetitive. Conversely, Phe and PP did not affect the hydrolysis of p-nitrophenyl-5'-TMP by rat serum.
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Affiliation(s)
- B Rücker
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil
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Abstract
Dietary supplementation with fish oil that contains omega-3 polyunsaturated fatty acids has been shown to enhance bone density as well as duodenal calcium uptake in rats. The latter process is supported by membrane ATPases. The present in vitro study was undertaken to test the effect of omega-3 fatty acids on ATPase activity in isolated basolateral membranes from rat duodenal enterocytes. Ca-ATPase in calmodulin-stripped membranes was activated in a biphasic manner by docosahexanoic acid (DHA) (10-30 microg/ml) but not by eicosapentanoic acid (EPA). This effect was blocked partially by 0.5 microM calphostin (a protein kinase C blocker). DHA inhibited Na,K-ATPase (-49% of basal activity, [DHA]=30 microg/ml, P <0.01). This effect could be reversed partially by 50 microM genistein, a tyrosine kinase blocker. EPA also inhibited Na,K-ATPase: (-47% of basal activity, [EPA]=30 microg/ml, P <0.01), this effect was partially reversed by 100 microM indomethacin, a cyclo-oxygenase blocker. Omega-3 fatty acids are thus involved in multiple signalling effects that effect ATPases in BLM.
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Affiliation(s)
- Marianne Haag
- Department of Physiology, University of Pretoria, PO Box 2034, Pretoria 0001, South Africa.
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Demenis MA, Furriel RPM, Leone FA. Characterization of an ectonucleoside triphosphate diphosphohydrolase 1 activity in alkaline phosphatase-depleted rat osseous plate membranes: possible functional involvement in the calcification process. Biochim Biophys Acta 2003; 1646:216-25. [PMID: 12637029 DOI: 10.1016/s1570-9639(03)00021-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An ectonucleoside triphosphate diphosphohydrolase 1 (NTPDase1) activity present in alkaline phosphatase-depleted rat osseous plate membranes, obtained 14 days after implantation of demineralized bone particles in the subcutaneous tissue of Wistar rats, was characterized. At pH 7.5, NTPDase1 hydrolyzed nucleotide triphosphates at rates 2.4-fold higher than those of nucleotide diphosphates, while the hydrolysis of nucleotide monophosphates and non-nucleotide phosphates was negligible. NTPDase 1 hydrolyzed ATP and ADP following Michaelis-Menten kinetics with V=1278.7+/-38.4 nmol Pi/min/mg and K(M)=83.3+/-2.5 microM and V=473.9+/-18.9 nmol Pi/min/mg and K(M)=150.6+/-6.0 microM, respectively, but in the absence of magnesium and calcium ions, ATP or ADP hydrolysis was negligible. The stimulation of the NTPDase1 by calcium (V=1084.7+/-32.5 nmol Pi/min/mg; and K(M)=377.8+/-11.3 microM) and magnesium (V=1367.2+/-41.0 nmol Pi/min/mg and K(M)=595.3+/-17.8 microM) ions suggested that each ion could replace the other during the catalytic cycle of the enzyme. Oligomycin, ouabain, bafilomycin A(1), theophylline, thapsigargin, ethacrynic acid, P(1),P(5)-(adenosine-5')-pentaphosphate and omeprazole had negligible effects on the hydrolysis of ATP and ADP by NTPDase1. However, suramin and sodium azide were effective inhibitors of ATP and ADP hydrolysis. To our knowledge this is the first report suggesting the presence of NTPDase1 in rat osseous plate membranes. Considering that the ectonucleoside triphosphate diphosphohydrolase family of enzymes participates in many regulatory functions, such as response to hormones, growth control, and cell differentiation, the present observations raise interesting questions about the participation of this activity in the calcification process.
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Affiliation(s)
- Marlene A Demenis
- Departamento de Química-Faculdade de Filosofia Ciências e Letras de Ribeirão Preto/USP, Avenida Bandeirantes 3.900, 14040-901 Ribeirão Preto, SP, Brazil
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Rossatto ER, da Silva LB, Pereira GS, Bonan CD, Battastini AMO, Ribeiro JP, Sarkis JJF. ATP diphosphohydrolase in human platelets from patients with coronary arteries heart disease. Platelets 2003; 14:47-52. [PMID: 12623446 DOI: 10.1080/0953710021000062923] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
ATP diphosphohydrolase is an enzyme described in platelets and may be related to the control of ADP-dependent platelet aggregation. Platelet aggregation in atherosclerotic coronary arteries, and the release of platelet-derived factors, play an important role in coronary artery disease syndromes. In this study, we determined the activity of ATP diphosphohydrolase in platelets from patients with chronic and acute coronary artery disease syndromes and healthy persons. The following groups were studied: healthy persons (group I), patients with chronic heart disease (group II) and acute heart disease (group III). Results did not demonstrate differences between the groups studied. The control group demonstrated a lower range of enzyme activity. The patients from groups II and III had ingested drugs with actions upon the cardiovascular system and the effect, in vitro, of these drugs upon the ATP diphosphohydrolase activity in human platelets was also investigated. The in vitro experiments demonstrated that 2.0 mM acetylsalicylic acid inhibited ATP hydrolysis by human platelets by approximately 55%. Significant correlation was observed between ADP hydrolysis and glucose blood levels in the control group and between ATP hydrolysis and triglycerides in the group II. These results contribute to our understanding of a possible relationship between ATP diphosphohydrolase and thrombogenesis.
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Affiliation(s)
- E R Rossatto
- Laboratório de Pesquisas Biomédicas, Serviço de Cardiologia, Hospital de Clínicas de Porto Alegre, RS, Brazil
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Nedeljkovic N, Banjac A, Horvat A, Stojiljkovic M, Nikezic G. Ecto-ATPase and ecto-ATP-diphosphohydrolase are co-localized in rat hippocampal and caudate nucleus synaptic plasma membranes. Physiol Res 2003; 52:797-804. [PMID: 14640903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
Enzymes that hydrolyze extracellular ATP, i.e. ecto-ATPase and ecto-ATP diphosphohydrolase (ATPDase), can be differentiated by ability of the latter to hydrolyze ADP and by slightly different kinetic properties of the two enzymes. Synaptic plasma membrane fractions isolated from rat hippocampus and caudate nucleus exhibit ADP-hydrolyzing activity, as revealed by the enzyme assay, and the presence of ecto-ATPase protein, as revealed by immunological identification on Western blot. These findings indicate that both enzymes are co-expressed in the synaptic membrane compartment of hippocampal and caudate nucleus neurons. Kinetic analysis was performed to determine the relative contribution of each enzyme to the total ATP-hydrolyzing activity, while an inhibition study was carried out in order to exclude the interference of other nonspecific ATPase and phosphatase activities. Based on the kinetic properties, sensitivity to inhibitors and V(ATP)/V(ADP) ratio of about 2, we concluded that a substantial portion of ATP-hydrolyzing activity in both synaptic membrane preparations can be ascribed to the catalytic action of ATPDase. On the other hand, the highest catalytic efficacy when ATP is the substrate and the greater abundance of ecto-ATPase protein in caudate nucleus preparation suggest that the relative contribution of ecto-ATPase to the total ATP-hydrolyzing activity in the caudate nucleus is higher than in the hippocampus.
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Affiliation(s)
- N Nedeljkovic
- Department of General Physiology and Biophysics, Faculty of Biology, University of Belgrade, Studentski trg 3, 11001 Belgrade, Yugoslavia.
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Krötz F, Sohn HY, Keller M, Gloe T, Bolz SS, Becker BF, Pohl U. Depolarization of endothelial cells enhances platelet aggregation through oxidative inactivation of endothelial NTPDase. Arterioscler Thromb Vasc Biol 2002; 22:2003-9. [PMID: 12482826 DOI: 10.1161/01.atv.0000043454.08172.51] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE The objective of this study was to investigate whether depolarization of cultured endothelial cells (human umbilical vein endothelial cells, HUVECs) affects their ectonucleotidase activity through superoxide (O2-) production. METHODS AND RESULTS Depolarization by the cation channel gramicidin (100 nmol/L) or tetrabutylammonium chloride (1 mmol/L) induced O2- release from HUVECs (n=4), which was decreased by superoxide dismutase (SOD, 500 U/mL). The activity of endothelial ectonucleotidases was assessed by the production of inorganic phosphate from ADP, which was decreased by chronic depolarization by 25% (n=6, P<0.05) and the amount of AMP derived from ADP in the presence of the 5'-nucleotidase inhibitor alpha,beta-methylene-5'-diphosphate (100 micromol/L). AMP was decreased by chronic depolarization from 0.54+/-0.16 to 0.39+/-0.11 micromol/min/mg protein (n=6, P<0.05). This was abolished in the continuous presence of SOD (n=6). NTPDase protein was predominantly expressed in HUVECs (n=4). Protein abundance, viability of cells, and apoptosis rates were not altered by depolarization (n=10). Only in the presence of depolarized HUVECs, but not with control cells or with HUVECs depolarized in the presence of SOD, did 5 micromol/L of ADP cause irreversible platelet aggregation. Increases in transmural pressure induced endothelial depolarization in intact hamster small arterioles. CONCLUSIONS Depolarization causes the endothelial production of O2-, which inhibits the activity of endothelial ectonucleotidases. Increases in transmural pressure induce endothelial depolarization. In chronically hypertensive diseases, depolarization might favor platelet aggregation.
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Flores-Herrera O, Uribe A, García-Pérez C, Milán R, Martínez F. 5'-p-Fluorosulfonylbenzoyl adenosine inhibits progesterone synthesis in human placental mitochondria. Biochim Biophys Acta 2002; 1585:11-8. [PMID: 12457710 DOI: 10.1016/s1388-1981(02)00302-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The human placental mitochondria have an ATP-diphosphohydrolase (apyrase) activity. In this paper we characterized the effect of 5'-p-fluorosulfonylbenzoyl adenosine (FSBA) on placental apyrase, and its repercussion on progesterone synthesis and oxygen consumption. Apyrase activity was inhibited by FSBA. Nucleosides tri- and diphosphates protected against FSBA inactivation, but divalent cations did not, indicating that FSBA attaches itself to an ATP-binding site of apyrase. In mitochondria, the inactivation of apyrase by FSBA was associated with inhibition of progesterone synthesis. Also, the oxygen consumption induced by ATP but not by ADP, was inhibited, clearly showing that FSBA exclusively inactivated the apyrase in human placental mitochondria. It is concluded that the apyrase activity is closely related to progesterone synthesis, probably associated with the cholesterol transport between mitochondrial membranes.
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Affiliation(s)
- O Flores-Herrera
- Departamento de Bioqui;mica, Facultad de Medicina, Universidad Nacional Autónoma de México. Apartado Postal 70-159, 04510, D.F., Mexico, Mexico
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Abstract
Apyrases are enzymes that efficiently hydrolyze ATP and ADP and may operate both inside and outside the cell. Although apyrases are important to a variety of cellular mechanisms and uses in industry, there are no available apyrase-specific inhibitors. Colorimetric assays based on the Fiske-Subbarow method for measuring inorganic phosphate are able to detect the release of inorganic phosphate from ATP and other nucleotides. We found that this type of assay could be automated and used to screen for apyrase-inhibiting compounds by assaying for a reduction in released phosphate in the presence of potential inhibitors. The automation of this assay allowed for the successful screening of a commercially available compound library. Several low molecular weight compounds were identified that, when used at micromolar concentrations, effectively inhibited apyrase activity.
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45
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Kaneider NC, Egger P, Dunzendorfer S, Noris P, Balduini CL, Gritti D, Ricevuti G, Wiedermann CJ. Reversal of thrombin-induced deactivation of CD39/ATPDase in endothelial cells by HMG-CoA reductase inhibition: effects on Rho-GTPase and adenosine nucleotide metabolism. Arterioscler Thromb Vasc Biol 2002; 22:894-900. [PMID: 12067895 DOI: 10.1161/01.atv.0000018305.95943.f7] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Adenosine triphosphate and diphosphate that activate platelet, leukocyte, and endothelium functions are hydrolyzed by endothelial CD39/ATPDase. Because CD39/ATPDase is downregulated in endothelial cells by inflammation and this may be affected by HMG-CoA reductase inhibitors, we examined the role of cerivastatin and simvastatin in regulation of endothelial CD39/ATPDase expression, metabolism of ATP/ADP, and function in platelets. Thrombin-stimulated endothelial cells in vitro were treated with the statins, and hydrolysis of exogenous ADP and ATP was assessed by high-performance liquid chromatography and malachite green assay. Platelet aggregation studies were performed with endothelial cell supernatants as triggers. CD39/ATPDase surface expression by endothelial cells was determined immunologically by fluorescence-activated cell sorter, mRNA expression by RT-PCR, and thrombin-induced dissociation of Rho-GTPases by Western blotting. Treatment by simvastatin or cerivastatin restored impaired metabolism of exogenous ATP and ADP in thrombin-activated endothelial cells by preventing thrombin-induced downregulation of CD39/ATPDase. In platelet aggregation studies, ATP and ADP supernatants of thrombin-activated endothelial cells were less stimulatory in the presence of statins than in their absence. Data show that statins preserve CD39/ATPDase activity in thrombin-treated endothelial cells involving alterations by statins of Rho-GTPase function and CD39/ATPDase expression. Preservation of adenine nucleotide metabolism may directly contribute to the observed anti-thrombotic and anti-inflammatory actions of statins.
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Gendron FP, Benrezzak O, Krugh BW, Kong Q, Weisman GA, Beaudoin AR. Purine signaling and potential new therapeutic approach: possible outcomes of NTPDase inhibition. Curr Drug Targets 2002; 3:229-45. [PMID: 12041737 DOI: 10.2174/1389450023347713] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Interest for extracellular nucleotides has increased since the pioneer work of Burnstock in the early seventies. Research on cellular functions modulated by purines and pyrimidines has led to the identification and characterization of the different components of purine signaling, namely purinoceptors and ecto-nucleotidases. Receptors for tri- and diphosphonucleosides, known as P2 nucleotide receptors, are designated either P2Y receptors, for those coupled to G-proteins, or P2X for those which are ligand gated-ion channels. Ecto-nucleoside triphosphate diphosphohydrolase (NTPDase; EC 3.6.1.5), previously identified as ecto-ATPase, ecto-ATPDase or CD39, is now considered as the main ecto-nucleotidase responsible for the sequential hydrolysis of beta and gamma phosphates of tri- and diphosphonucleosides. More recently, research has been focused on the development of specific agonists and antagonists to P2 purinoceptors. The need to develop specific inhibitors for NTPDase to understand the role of this enzyme has clearly emerged. This paper covers the development of specific molecules targeting purinergic signaling, more specifically the inhibition of NTPDase and their impact on the different physiological systems.
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Affiliation(s)
- F P Gendron
- Department of Biochemistry, University of Missouri-Columbia, 65212, USA.
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47
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Abstract
ATPase and ADPase activities capable of hydrolyzing nucleoside di- and triphosphates in the presence of Ca2+ are present in synovial membrane of metacarpophalangeal joint mainly associated to membrane fractions. These hydrolytic activities have been considered involved in the inflammatory process where ATP and ADP are inflammatory mediators while adenosine counteracts this effect. Both, subcellular localization and kinetic properties of these nucleotidase activities, suggest that could correspond to single enzyme called ATP-diphosphohydrolase or apyrase. The comparison of the activity on ATP-Ca and ADP-Ca from normal and pathological equine synovial membrane did not show significant differences either in the subcellular fraction distribution or in the enrichment of each subcellular fraction. Neither differences on 5'-nucleotidase activity present in the microsomal fraction were observed.
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Affiliation(s)
- Paula A Jiménez
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago
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Coimbra ES, Gonçalves-da-Costa SC, Corte-Real S, De Freitas FGR, Durão AC, Souza CSF, Silva-Santos MI, Vasconcelos EG. Characterization and cytochemical localization of an ATP diphosphohydrolase from Leishmania amazonensis promastigotes. Parasitology 2002; 124:137-43. [PMID: 11862992 DOI: 10.1017/s0031182001001056] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
An ATP diphosphohydrolase was identified in the plasma membranes isolated from promastigote forms of Leishmania amazonensis. Both ATP and ADP were hydrolysed at similar rates by the enzyme. Other nucleotides such as UTP, GTP and CTP were also degraded, revealing a broad substrate specificity. Adding ATP and ADP simultaneously, the amount of hydrolysis achieved was compatible with the presence of a single enzyme. ATPase activity was not affected by addition of vanadate, ouabain, thapsigargin, dicyclohexylcarbodiimide, oligomycin and bafilomycin A, thus excluding involvement of P-, F- and V-type ATPases. The effects of pH in the range 6.5-8.5 were examined using ATP or p-NPP as substrate. At pH 7.4, the phosphatase activity decreased, and did not show a significant contribution to ATP hydrolysis. In addition, the enzyme was not inhibited by levamisole and ammonium molybdate, excluding alkaline phosphatase and nucleotidase activities, respectively. Sodium azide (5-10 mM) caused inhibition of the ATP and ADP hydrolysis in a dose-dependent manner. Calcium was the best activating metal ion for both ATPase and ADPase activities. Ultrastructural cytochemical microscopy showed ATP diphosphohydrolase on the surface and flagellar pocket of the parasite. We have proposed that L. amazonensis ATP diphosphohydrolase may participate in the salvage pathway of nucleosides.
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Affiliation(s)
- E S Coimbra
- Departamento de Bioquímica, ICB, Universidade Federal de Juiz de Fora, MG, Brasil
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Seyfarth HJ, Koksch M, Roethig G, Rother T, Neugebauer A, Klein N, Pfeiffer D. Effect of 300- and 450-mg clopidogrel loading doses on membrane and soluble P-selectin in patients undergoing coronary stent implantation. Am Heart J 2002; 143:118-23. [PMID: 11773921 DOI: 10.1067/mhj.2002.119372] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
BACKGROUND After coronary artery stent implantation patients are treated with the adenosine diphosphatase (ADP) receptor antagonist clopidogrel to prevent subacute stent thromboses. Today these patients initially receive a loading dose of 300 mg of clopidogrel to accelerate the complete drug effect. In the current study we investigated whether a higher loading dose can shorten the time until the maximum platelet inhibitory effect of clopidogrel is achieved. METHODS P-selectin expression of nonstimulated and ADP-stimulated platelets was flow cytometrically measured before the clopidogrel loading dose and on 3 consecutive days in 52 patients with coronary artery disease: 21 patients in group 1 received 300 mg of clopidogrel after stent implantation and 11 patients in group 2 received the higher 450-mg clopidogrel loading dose followed by a daily dose of 75 mg of clopidogrel for both groups. The control group consisted of 20 patients who were monitored over 2 days before coronary intervention. Soluble P-selectin levels in plasma were determined by an enzyme-linked immunosorbent assay. RESULTS Inducible P-selectin expression on ADP-stimulated platelets was significantly reduced (P =.05) on days 1 and 2 in patient group 2 (450-mg loading dose) compared with group 1 (300-mg loading dose). No influence of clopidogrel on the P-selectin levels in plasma was observed. CONCLUSIONS In our study the application of 450 mg of clopidogrel as the loading dose in patients undergoing coronary stenting shortens the period until the maximum effect of the ADP receptor antagonist is achieved and thus may lead to a more successful prevention of subacute coronary stent thromboses.
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Berti SL, Bonan CD, da Silva FL, Battastini AM, Sarkis JJ, Wannmacher CM. Phenylalanine and phenylpyruvate inhibit ATP diphosphohydrolase from rat brain cortex. Int J Dev Neurosci 2001; 19:649-53. [PMID: 11705669 DOI: 10.1016/s0736-5748(01)00048-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
The main objective of the present study was to characterize the inhibition by phenylalanine and phenylpyruvate of ATP diphosphohydrolase activity in synaptosomes from the brain cortex of rats. This enzyme participates together with a 5'-nucleotidase in adenosine formation from the neurotransmitter, ATP, in the synaptic cleft. The inhibition of ATP diphosphohydrolase was competitive for nucleotide hydrolysis but 5'-nucleotidase was not affected by these metabolites. Furthermore, the two substances inhibited enzyme activity by acting at the same binding site. If the enzyme inhibition observed in vitro also occurs in the brain of PKU patients, it may promote an increase in ATP levels in the synaptic cleft. In this case, the neurotoxicity of ATP could possibly be one of the mechanisms leading to the characteristic brain damage of phenylketonuria.
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Affiliation(s)
- S L Berti
- Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-anexo, 90035-003, Porto Alegre, RS, Brazil
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