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de Cássia Lemos Lima R, T Kongstad K, Kato L, José das Silva M, Franzyk H, Staerk D. High-Resolution PTP1B Inhibition Profiling Combined with HPLC-HRMS-SPE-NMR for Identification of PTP1B Inhibitors from Miconia albicans. Molecules 2018; 23:molecules23071755. [PMID: 30018269 PMCID: PMC6100288 DOI: 10.3390/molecules23071755] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [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: 06/14/2018] [Revised: 07/09/2018] [Accepted: 07/12/2018] [Indexed: 12/18/2022] Open
Abstract
Protein tyrosine phosphatase 1B (PTP1B) is an intracellular enzyme responsible for deactivation of the insulin receptor, and consequently acts as a negative regulator of insulin signal transduction. In recent years, PTP1B has become an important target for controlling insulin resistance and type 2 diabetes. In the present study, the ethyl acetate extract of leaves of Miconia albicans (IC50 = 4.92 µg/mL) was assessed by high-resolution PTP1B inhibition profiling combined with HPLC-HRMS-SPE-NMR for identification of antidiabetic compounds. This disclosed eleven PTP1B inhibitors, including five polyphenolics: 1-O-(E)-caffeoyl-4,6-di-O-galloyl-β-d-glucopyranose (2), myricetin 3-O-α-l-rhamnopyranoside (3), quercetin 3-O-(2″-galloyl)-α-l-rhamnopyranoside (5), mearnsetin 3-O-α-l-rhamnopyranoside (6), and kaempferol 3-O-α-l-arabinopyranoside (8) as well as eight triterpenoids: maslinic acid (13), 3-epi-sumaresinolic acid (14), sumaresinolic acid (15), 3-O-cis-p-coumaroyl maslinic acid (16), 3-O-trans-p-coumaroyl maslinic acid (17), 3-O-trans-p-coumaroyl 2α-hydroxydulcioic acid (18), oleanolic acid (19), and ursolic acid (20). These results support the use of M. albicans as a traditional medicine with antidiabetic properties and its potential as a source of PTP1B inhibitors.
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Affiliation(s)
- Rita de Cássia Lemos Lima
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
| | - Kenneth T Kongstad
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
| | - Lucília Kato
- Instituto de Química, Universidade Federal de Goiás, Goiânia 70040-010, Brazil.
| | - Marcos José das Silva
- Instituto de Ciências Biológicas, Universidade Federal de Goiás, Goiânia 70040-010, Brazil.
| | - Henrik Franzyk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen, Denmark.
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Röhrig T, Liesenfeld D, Richling E. Identification of a Phosphodiesterase-Inhibiting Fraction from Roasted Coffee (Coffea arabica) through Activity-Guided Fractionation. J Agric Food Chem 2017; 65:3792-3800. [PMID: 28443667 DOI: 10.1021/acs.jafc.6b05613] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recent reports that coffee can significantly inhibit cAMP phosphodiesterases (PDEs) in vitro, as well as in vivo, have described another beneficial effect of coffee consumption. However, the PDE-inhibiting substances remain mostly unknown. We chose activity-guided fractionation and an in vitro test system to identify the coffee components that are responsible for PDE inhibition. This approach indicated that a fraction of melanoidins reveals strong PDE-inhibiting potential (IC50 = 130 ± 42 μg/mL). These melanoidins were characterized as water-soluble, low-molecular weight melanoidins (<3 kDa) with a nitrogen content of 4.2% and a carbohydrate content lower than those of other melanoidins. Fractions containing known PDE inhibitors such as chlorogenic acids, alkylpyrazines, or trigonelline as well as N-caffeoyl-tryptophan and N-p-coumaroyl-tryptophan did not exert PDE-inhibiting activity. We also observed that the known PDE inhibitor caffeine does not contribute to the PDE-inhibiting effects of coffee.
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Affiliation(s)
- Teresa Röhrig
- Department of Chemistry, Division of Food Chemistry and Toxicology, University of Kaiserslautern , Erwin-Schroedinger-Straße 52, D-67663 Kaiserslautern, Germany
| | - David Liesenfeld
- Department of Chemistry, Division of Food Chemistry and Toxicology, University of Kaiserslautern , Erwin-Schroedinger-Straße 52, D-67663 Kaiserslautern, Germany
| | - Elke Richling
- Department of Chemistry, Division of Food Chemistry and Toxicology, University of Kaiserslautern , Erwin-Schroedinger-Straße 52, D-67663 Kaiserslautern, Germany
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Tian LW, Feng Y, Tran TD, Shimizu Y, Pfeifer T, Forster PI, Quinn RJ. Tyrosyl-DNA Phosphodiesterase I Inhibitors from the Australian Plant Macropteranthes leichhardtii. J Nat Prod 2015; 78:1756-1760. [PMID: 26149757 DOI: 10.1021/acs.jnatprod.5b00211] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Mass-directed isolation of the CH2Cl2/MeOH extract from the bark of an Australian plant, Macropteranthes leichhardtii, resulted in the purification of a new phenylpropanoid glucoside, macropteranthol (1), together with four known analogues (2-5). The structure of compound 1 was elucidated by NMR and MS data analyses and quantum chemical calculations. Compounds 3 and 5 showed inhibitory activity against tyrosyl-DNA phosphodiesterase I with IC50 values of ∼1.0 μM.
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Affiliation(s)
- Li-Wen Tian
- †Eskitis Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Yunjiang Feng
- †Eskitis Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Trong D Tran
- †Eskitis Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
| | - Yoko Shimizu
- ‡Centre for Drug Research and Development, Vancouver, BC 2405, Canada
| | - Tom Pfeifer
- ‡Centre for Drug Research and Development, Vancouver, BC 2405, Canada
| | | | - Ronald J Quinn
- †Eskitis Institute for Drug Discovery, Griffith University, Brisbane, QLD 4111, Australia
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Cheng ZB, Lu X, Bao JM, Han QH, Dong Z, Tang GH, Gan LS, Luo HB, Yin S. (±)-Torreyunlignans A-D, rare 8-9' linked neolignan enantiomers as phosphodiesterase-9A inhibitors from Torreya yunnanensis. J Nat Prod 2014; 77:2651-2657. [PMID: 25495612 DOI: 10.1021/np500528u] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
(±)-Torreyunlignans A-D (1a/1b-4a/4b), four pairs of new 8-9' linked neolignan enantiomers featuring a rare (E)-2-styryl-1,3-dioxane moiety, were isolated from the trunk of Torreya yunnanensis. The structures were determined by combined spectroscopic and chemical methods, and the absolute configurations were elucidated by ECD calculations. The compounds were screened by using tritium-labeled adenosine 3',5'-cyclic monophosphate ([(3)H]-cGMP) as a substrate for inhibitory affinities against phosphodiesterase-9A (PDE9A), which is a potential target for the treatment of diabetes and Alzheimer's disease. All of the enantiomers exhibited inhibition against PDE9A with IC50 values ranging from 5.6 to 15.0 μM. This is the first report of PDE9A inhibitors from nature.
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Affiliation(s)
- Zhong-Bin Cheng
- School of Pharmaceutical Sciences, Sun Yat-sen University , Guangzhou, Guangdong 510006, People's Republic of China
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Sun ZH, Cai YH, Fan CQ, Tang GH, Luo HB, Yin S. Six new tetraprenylated alkaloids from the South China Sea gorgonian Echinogorgia pseudossapo. Mar Drugs 2014; 12:672-81. [PMID: 24473168 PMCID: PMC3944508 DOI: 10.3390/md12020672] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [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: 11/25/2013] [Revised: 12/10/2013] [Accepted: 01/13/2014] [Indexed: 12/02/2022] Open
Abstract
Six new tetraprenylated alkaloids, designated as malonganenones L–Q (1–6), were isolated from the gorgonian Echinogorgia pseudossapo, collected in Daya Bay of Guangdong Province, China. The structures of 1–6 featuring a methyl group at N-3 and a tetraprenyl chain at N-7 in the hypoxanthine core were established by extensive spectroscopic analyses. Compounds 1–6 were tested for their inhibitory activity against the phosphodiesterases (PDEs)-4D, 5A, and 9A, and compounds 1 and 6 exhibited moderate inhibitory activity against PDE4D with IC50 values of 8.5 and 20.3 µM, respectively.
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Affiliation(s)
- Zhang-Hua Sun
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Ying-Hong Cai
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Cheng-Qi Fan
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China.
| | - Gui-Hua Tang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Hai-Bin Luo
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
| | - Sheng Yin
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China.
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Low BS, Choi SB, Abdul Wahab H, Das PK, Chan KL. Eurycomanone, the major quassinoid in Eurycoma longifolia root extract increases spermatogenesis by inhibiting the activity of phosphodiesterase and aromatase in steroidogenesis. J Ethnopharmacol 2013; 149:201-207. [PMID: 23810842 DOI: 10.1016/j.jep.2013.06.023] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [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: 01/17/2013] [Revised: 04/06/2013] [Accepted: 06/14/2013] [Indexed: 06/02/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Eurycoma longifolia Jack (Simaroubaceae family), known locally as 'Tongkat Ali' by the ethnic population, is popularly taken as a traditional remedy to improve the male libido, sexual prowess and fertility. Presently, many tea, coffee and carbonated beverages, pre-mixed with the root extract are available commercially for the improvement of general health and labido. Eurycomanone, the highest concentrated quassinoid in the root extract of E. longifolia improved fertility by increasing testosterone and spermatogenesis of rats through the hypothalamus-pituitary-gonadal axis, but the mechanisms underlying the effects are not totally clear. AIM OF THE STUDY To provide evidences on the plant ethnopharmacological use and the involvement of eurycomanone, the major indigenous plant quassinoid in testosterone steroidogenesis and spermatogenesis increase. MATERIAL AND METHODS The rat testicular Leydig cell-rich interstitial cells were isolated and incubated in the culture medium M199. The viability of the cells was determined with trypan blue staining and the concentration of the viable cells was counted with a haemocytometer. The 3β-hydroxysteroid dehydrogenase (HSD) staining method was used to measure the abundance of Leydig cells in the preparation. Eurycomanone and the standard steroidogenesis inhibitors were incubated with 1.0 × 10(5) cells, and after 2h, the testosterone and the oestrogen concentrations were determined by the ELISA method. Computational molecular docking was performed to determine the binding affinity of the compound at the respective steroidogenesis enzymes. RESULTS Eurycomanone (EN) significantly increased testosterone production dose-dependently at 0.1, 1.0 and 10.0 μM (P<0.05), but the two lower doses when combined with 3-isobutyl-1-methylxanthine (IBMX), the phosphodiesterase inhibitor were not significantly higher than EN or IBMX alone, except at a higher concentration. The molecular docking studies indicated EN and IBMX were binding at different sites of the enzyme. EN has no reversal of inhibition by aminoglutethimide, ketoconazole or nifedipine at the respective steroidogenesis enzyme. The quassinoid was also non-responsive to the inhibition of oestrogen receptor by tamoxifen, but displayed improved formestane inhibition of aromatase in reducing oestrogen production. The molecular docking studies further supported that EN and formestane bound to aromatase with similar orientations and free energy binding values. CONCLUSION Eurycomanone enhanced testosterone steroidogenesis at the Leydig cells by inhibiting aromatase conversion of testosterone to oestrogen, and at a high concentration may also involve phosphodiesterase inhibition. The quassinoid may be worthy for further development as a phytomedicine to treat testosterone-deficient idiopathic male infertility and sterility.
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Affiliation(s)
- Bin-Seng Low
- School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia
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Fozing CDA, Ali Z, Ngadjui BT, Choudhary MI, Kapche GDWF, Abegaz BM, Khan IA. Phosphodiesterase I-inhibiting Diels-Alder adducts from the leaves of Morus mesozygia. Planta Med 2012; 78:154-159. [PMID: 22083899 DOI: 10.1055/s-0031-1280338] [Citation(s) in RCA: 14] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A new 2-arylbenzofuran derivative, (+)-dimethylsmoracin O (1), and three new Diels-Alder type adducts, mesozygins A–C (2–4), in addition to eight known compounds, artonin I (5), chalcomaracin (6), norartocarpetin (7), moracin L (8), mulberrofuran F (9), moracin M (10), moracin C (11), and morachalcone A (12),were isolated from the leaves of Morus mesozygia Stapf. Structures were elucidated by spectroscopic data analyses. Compounds 2-7 displayed a potent phosphodiesterase I inhibitory activity.
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Affiliation(s)
- Christian D A Fozing
- Department of Organic Chemistry, Faculty of Science, University of Yaounde I, Yaounde, Cameroon
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Jiang D, Chen Y, Hou X, Xu J, Mu X, Chen W. Influence of Paeonia lactiflora roots extract on cAMP-phosphodiesterase activity and related anti-inflammatory action. J Ethnopharmacol 2011; 137:914-920. [PMID: 21782011 DOI: 10.1016/j.jep.2011.07.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 06/12/2011] [Accepted: 07/06/2011] [Indexed: 05/31/2023]
Abstract
BACKGROUND Paeonia lactiflora root (baishao in Chinese) is a commonly used herb in TCM. Research has shown baishao to have positive pharmacological actions, including, particularly, anti-inflammatory properties. In this paper we studied the influence of baishao extract on cAMP-phosphodiesterase (PDE) activity and related anti-inflammatory action to identify new pharmacologic action for its clinically widespread use. METHODS PDE activity was calculated by cAMP change examined with HPLC, respiratory burst of neutrophils was detected with method of cytochrome C reduction, elastase release was indicated with the substrate reduction, rat arthritis model was caused by complete Freund's adjuvant, mouse capillary permeability model was made by acetic acid, and chemical constituents of baishao extract was identified by HPLC, mass spectroscopy and NMR spectrum. RESULTS Baishao extract had significant inhibition on cAMP-PDE activity (p<0.01), had dose dependent restraint on neutrophils respiratory burst (p<0.001), had inhibition at low concentration and promotion at high concentration on elastase release (p<0.05), and had obvious restraint on local inflammation of animal model (p<0.01). Analysis of HPLC, mass spectroscopy and NMR spectrum showed baishao extract mainly had five components (identified as gallic acid, paeoniflorin sulfonate, albiflorin, paeoniflorin and benzoic acid), among which gallic acid had the largest inhibition on cAMP-PDE activity. CONCLUSION The anti-inflammatory effects of baishao may be mediated, at least in part, through its gallic acid content, and this effect may be regulated in part by an inhibition on cAMP-PDE.
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MESH Headings
- 3',5'-Cyclic-AMP Phosphodiesterases/antagonists & inhibitors
- 3',5'-Cyclic-AMP Phosphodiesterases/metabolism
- Animals
- Anti-Inflammatory Agents/chemistry
- Anti-Inflammatory Agents/isolation & purification
- Anti-Inflammatory Agents/pharmacology
- Arthritis, Experimental/chemically induced
- Arthritis, Experimental/drug therapy
- Arthritis, Experimental/enzymology
- Arthritis, Experimental/immunology
- Capillary Permeability/drug effects
- Cells, Cultured
- Chromatography, High Pressure Liquid
- Cytochromes c/metabolism
- Dose-Response Relationship, Drug
- Drugs, Chinese Herbal/chemistry
- Drugs, Chinese Herbal/isolation & purification
- Drugs, Chinese Herbal/pharmacology
- Freund's Adjuvant
- Gallic Acid/pharmacology
- Leukocyte Elastase/metabolism
- Magnetic Resonance Spectroscopy
- Mass Spectrometry
- Mice
- Neutrophils/drug effects
- Neutrophils/enzymology
- Neutrophils/immunology
- Oxidation-Reduction
- Paeonia/chemistry
- Phosphodiesterase Inhibitors/chemistry
- Phosphodiesterase Inhibitors/isolation & purification
- Phosphodiesterase Inhibitors/pharmacology
- Plant Roots
- Plants, Medicinal
- Rats
- Rats, Sprague-Dawley
- Respiratory Burst/drug effects
- Swine
- Swine, Miniature
- Time Factors
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Affiliation(s)
- Daixun Jiang
- Beijing Key Laboratory of Traditional Chinese Veterinary Medicine, Beijing University of Agriculture, Beijing 102206, PR China
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Abstract
CONTEXT This study describes the antispasmodic, bronchodilator, and cardiovascular-modulatory activities of Hypericum perforatum Linn. (Hypericaceae) fractions and constituents. AIM OF STUDY Pharmacological investigation of H. perforatum fractions and active principles. MATERIALS AND METHODS H. perforatum extract fractions [petroleum spirit (HpPet), chloroform (HpCHCl(3)), ethyl acetate (HpEtAc), and aqueous (HpAq)] and its compounds (hyperforin, hypericin, and hyperoside) were studied in various isolated tissue preparations. RESULTS In rabbit jejunum, HpCHCl(3), HpEtAc and HpAq, like papaverine, inhibited both spontaneous and K(+) (80 mM)-induced contractions at similar concentrations, whereas HpPet was relatively potent against K(+), as verapamil. All fractions caused rightward of Ca(2+) concentration-response curves (CRCs), similar to verapamil. HpCHCl(3), HpEtAc, and HpAq shifted isoprenaline-inhibitory CRCs to left, like papaverine, while HpPet was devoid of any such effect, as verapamil. In guinea-pig trachea, HpCHCl(3), HpEtAc, and HpAq equipotently relaxed carbachol and K(+)-induced contractions and shifted the isoprenaline-curves to the left, whereas HpPet was more effective against K(+), without potentiating isoprenaline effect. When tested in rabbit aorta, all fractions exhibited vasoconstrictor and vasodilator effects, except HpEtAc, which did not produce vasoconstriction. In guinea-pig atria HpCHCl(3), HpEtAc, and HpAq initially caused cardiac stimulation, followed by inhibition, similar to papaverine, whereas HpPet, like verapamil, caused only cardiac suppression. Hyperforin, hypericin, and hyperoside showed a similar pattern of spasmolytic effect to verapamil. DISCUSSION AND CONCLUSION Thus, all tested fractions of H. perforatum exhibit a combination of Ca(2+) antagonist and phosphodiesterase-inhibition, except petroleum spirit which was devoid of later mechanism. The compounds tested showed only Ca(2+) channel blocking effect.
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Affiliation(s)
- Arif-ullah Khan
- Department of Biological and Biomedical Sciences, Aga Khan University Medical College, Karachi-74800, Pakistan
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Abstract
The genus Symplocos has been reviewed for its chemical constituents and biological activities including traditional importance of some common species. The plants of this genus contain terpenoids, flavonoids, lignans, phenols, steroids, alkaloids, and iridoids. Terpenoids are the major constituents within the genus Symplocos and most of them exhibit antiproliferative effects. Some phenolic glycoside derivatives showed inhibitory activity against snake-venom phosphodiesterase I and human nucleotide pyrophosphatase phosphodiesterase I. The members of genus Symplocos are well known for their traditional uses in the treatment of various diseases like leprosy, gynecological disorders, ulcers, leucorrhea, menorrhagia, malaria, and tumefaction. The aim of the present paper is to review the comprehensive knowledge of the plants of this genus including the traditional uses, chemistry, and pharmacology.
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Affiliation(s)
- Ruchi Badoni
- Department of Chemistry, HNB Garhwal University, Srinagar, Uttarakhand, India
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Kim YS, Lee YM, Kim H, Kim J, Jang DS, Kim JH, Kim JS. Anti-obesity effect of Morus bombycis root extract: anti-lipase activity and lipolytic effect. J Ethnopharmacol 2010; 130:621-624. [PMID: 20669373 DOI: 10.1016/j.jep.2010.05.053] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
AIM OF THE STUDY This study evaluated anti-obesity effect of the ethanolic extract of Morus bombycis root on lipase activity and lipolysis in adipocytes and adipose tissues. MATERIALS AND METHODS Lipase (triacylgycerol acylhydrolase, EC 3.1.1.3) activity was determined by measuring the hydrolysis of p-nitrophenyl butyrate to p-nitrophenol at 405 nm. Lipolytic effects were assayed in fully differentiated 3T3-L1 adipocytes and adipose tissues. In vitro, phosphodiesterase (PDE) activity was also measured. RESULTS Morus bombycis root extract exhibited strong anti-lipase activity, with an IC50 value of 2.07 microg/mL.In differentiated adipocytes and adipose tissues, the extract increased lipolytic effects such as decreased intracellular triglyceride and the release of glycerol. Further, the extract inhibited PDE activity in a dose-dependent manner. CONCLUSION The present study suggests that Morus bombycis root extract might be of therapeutic interest with respect to the treatment of obesity.
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Affiliation(s)
- Young Sook Kim
- Diabetic Complications Research Center, Division of Traditional Korean Medicine (TKM) Integrated Research, Korea Institute of Oriental Medicine (KIOM), Yuseong-gu, Daejeon, Republic of Korea
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Nieto A, Peschka M, Borrull F, Pocurull E, Marcé RM, Knepper TP. Phosphodiesterase type V inhibitors: Occurrence and fate in wastewater and sewage sludge. Water Res 2010; 44:1607-1615. [PMID: 19959201 DOI: 10.1016/j.watres.2009.11.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2009] [Revised: 11/03/2009] [Accepted: 11/07/2009] [Indexed: 05/28/2023]
Abstract
The contamination of wastewater and sewage sludge has been examined for three phosphodiesterase type V inhibitors sildenafil, vardenafil and tadalafil, active agents of Viagra, Levitra and Cialis, respectively. Sensitive quantification methods based on solid-phase extraction (SPE) and pressurized liquid extraction (PLE) followed by high performance liquid chromatography - tandem mass spectrometry (HPLC-MS/MS) have been developed to analyse these compounds in wastewater and sewage sludge. Effluent water of nine sewage treatment plants (STPs) has been analysed to assess the impact of the phosphodiesterase type V inhibitors on the environment. One municipal STP (Tarragona, Spain) has been thoroughly studied over the year 2008 (i) with respect to the distribution of these compounds among influent and sewage sludge and (ii) the elimination efficiency. The developed methods allowed quantification at trace concentrations. Sildenafil was present in all investigated samples at the low ng/L and ng/g range, respectively. Tadalafil was not detected or below the limit of detection (LOQ) in effluent water taken in Spain but in sewage sludge (12 ng/g - < LOQ). Vardenafil was present only in one sludge sample and between 5 ng/g and < LOQ in effluent water. The overall removal efficiency of the STP in Tarragona (Spain) is 68%, 69% and 80% for sildenafil, tadalafil and vardenafil, respectively. This study shows for the first time the determination of these compounds in wastewater and sewage sludge.
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Affiliation(s)
- Antonio Nieto
- University of Applied Sciences Fresenius, Limburger Strabetae 2, 65510 Idstein, Germany.
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Kim J, Jang DS, Kim H, Kim JS. Anti-lipase and lipolytic activities of ursolic acid isolated from the roots of Actinidia arguta. Arch Pharm Res 2009; 32:983-7. [PMID: 19641878 DOI: 10.1007/s12272-009-1702-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [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: 06/05/2009] [Revised: 06/05/2009] [Accepted: 07/03/2009] [Indexed: 11/26/2022]
Abstract
The aim of this study was to investigate the anti-obestic effects of ursolic acid isolated from the roots of Actinidia arguta, as well as the mechanism of action of this compound. This was conducted by testing whether ursolic acid inhibited the elevation of the rat plasma triacylglycerol levels after oral administration of a lipid emulsion containing corn oil in rats. Ursolic acid prevented the elevation of plasma triacylglycerol levels 2 h after oral administration of the lipid emulsion at a dose of 100 mg/kg. Furthermore, ursolic acid inhibited phosphodiesterase activity in vitro with an IC(50) of 51.21 muM and enhanced lipolysis in rat fat cells. We suggest that the inhibitory effects of ursolic acid, isolated from the roots of A. arguta, on obesity, might be attributable to the inhibition of lipid absorption through the inhibition of pancreatic lipase and by enhancing lipolysis in fat cells.
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Affiliation(s)
- Junghyun Kim
- Diabetic Complications Research Center, Division of Traditional Korean Medicine (TKM) Integrated Research, Korea Institute of Oriental Medicine (KIOM), Daejeon, 305-811, Korea
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Temkitthawon P, Viyoch J, Limpeanchob N, Pongamornkul W, Sirikul C, Kumpila A, Suwanborirux K, Ingkaninan K. Screening for phosphodiesterase inhibitory activity of Thai medicinal plants. J Ethnopharmacol 2008; 119:214-217. [PMID: 18582551 DOI: 10.1016/j.jep.2008.05.034] [Citation(s) in RCA: 25] [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] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Revised: 05/25/2008] [Accepted: 05/29/2008] [Indexed: 05/26/2023]
Abstract
INTRODUCTION Phosphodiesterases (PDEs) are a group of enzymes that have powerful effects on cellular signaling because they regulate the second messenger, cAMP or cGMP. PDE inhibitors have been used for treatment of many indications such as cardiovascular diseases, chronic obstructive pulmonary diseases, erectile dysfunction and pulmonary hypertension. THE AIM OF THE STUDY The aim of the study was to search for sources of PDE inhibitors from Thai biodiversity. MATERIALS AND METHODS Some Thai medicinal plants used as aphrodisiac and neurotonic agents together with plants from Leguminosae collected from the North of Thailand were screened for PDE inhibitory activity using a radioassay. RESULTS Seven from nineteen aphrodisiac and neurotonic plants as well as three from twelve Leguminosae plants showed potent PDEs inhibitory activity. The concentrations that could inhibit 50% PDE activity (IC(50)) of the active extracts were determined in comparison to the standard inhibitor, 3-isobutyl-1-methylxanthine (IBMX). Betula alnoides, Hiptage benghalensis, Leea indica and Senna surrattensis showed IC(50) values in the range of microgram per milliliter while IBMX standard showed an IC(50) value of 0.68+/-0.13 microg/ml. CONCLUSION Thai biodiversity was the great sources of PDE inhibitors.
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Affiliation(s)
- Prapapan Temkitthawon
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok 65000, Thailand
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16
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Chaabi M, Antheaume C, Weniger B, Justiniano H, Lugnier C, Lobstein A. Biflavones of Decussocarpus rospigliosii as phosphodiesterases inhibitors. Planta Med 2007; 73:1284-6. [PMID: 17893835 DOI: 10.1055/s-2007-990218] [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: 05/17/2023]
Abstract
A phytochemical study of an ethyl acetate extract of Decussocarpus rospigliosii leaves led to the isolation of six 3'-8''-biapigenin derivatives identified as amentoflavone (1), podocarpusflavone A (2), sequoiaflavone (3), podocarpusflavone B (4), 7,7''-di-O-methylamentoflavone (5) and heveaflavone (6). Biflavones 1-4 showed strong inhibitory activity on several PDE isoforms. Biflavone (5) showed selective and potent inhibition of the PDE4 isoform (IC50=1.48+/-0.21 microM) and was almost as active as the reference drug Rolipram (IC50=1.1+/-0.2 microM).
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Affiliation(s)
- Mehdi Chaabi
- LC1 UMR-CNRS 7175 Biotechnologies, Biomolécules et Innovations Thérapeutiques, Faculté de Pharmacie de Strasbourg, Illkirch, France
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17
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Wang J, Jiang Y, Wang Y, Zhao X, Cui Y, Gu J. Liquid chromatography tandem mass spectrometry assay to determine the pharmacokinetics of aildenafil in human plasma. J Pharm Biomed Anal 2007; 44:231-5. [PMID: 17306493 DOI: 10.1016/j.jpba.2007.01.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [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: 11/08/2006] [Revised: 01/11/2007] [Accepted: 01/11/2007] [Indexed: 11/26/2022]
Abstract
A simple, sensitive and specific liquid chromatography/tandem mass spectrometry method for the quantitation of aildenafil, a new phosphodiesterase V inhibitor, in human plasma is presented. The analyte and internal standard, sildenafil, were extracted by a one-step liquid-liquid extraction in alkaline conditions and separated on a C(18) column using ammonia:10mM ammonium acetate buffer:methanol (0.1:15:85, v/v/v) as the mobile phase. The detection by an API 4000 triple quadrupole mass spectrometer in multiple-reaction monitoring mode was completed within 2.5 min. The calibration curve exhibited a linear dynamic range of 0.05-100 ng/ml with a 10 pg/ml limit of detection. The intra- and inter-day precisions measured as relative standard deviation were within 8.04% and 5.72%, respectively. This method has been used in a pharmacokinetic study of aildenafil in healthy male volunteers each given an oral administration of one of the three dosages.
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Affiliation(s)
- Jiang Wang
- Research Center for Drug Metabolism, College of Life Science, Jilin University, Changchun 130023, China
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18
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Hou P, Zou P, Low MY, Chan E, Koh HL. Structural identification of a new acetildenafil analogue from pre-mixed bulk powder intended as a dietary supplement. ACTA ACUST UNITED AC 2006; 23:870-5. [PMID: 16901855 DOI: 10.1080/02652030600803856] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [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: 10/24/2022]
Abstract
An analogue of acetildenafil was detected in an extract of pre-mixed bulk powder. To our knowledge, the powder was destined to be encapsulated and sold as a dietary supplement. The structure was identified by NMR, HR-ESI-MS, ESI-MSn and FTIR analyses. Owing to the inclusion of a hydroxyl group in acetildenafil, the detected compound was called 'hydroxyacetildenafil'. With increasing use of dietary supplements marketed for penile erectile dysfunction, the detection of analogues of sexual performance enhancers is important and timely.
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Affiliation(s)
- Peiling Hou
- Department of Pharmacy, Faculty of Science, National University of Singapore, Science Drive 4, Singapore 117543
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19
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Mostafa M, Nahar N, Mosihuzzaman M, Sokeng SD, Fatima N, Choudhary MI. Phosphodiesterase-I inhibitor quinovic acid glycosides fromBridelia ndellensis. Nat Prod Res 2006; 20:686-92. [PMID: 16901813 DOI: 10.1080/14786410600661658] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Quinovic acid-3-O-alpha-L-rhamnopyranoside (1), quinovic acid-3-O-beta-D-fucopyranoside (2), quinovic acid-3-O-beta-D-glucopyranosyl (1 --> 4)-beta-D-fucopyranoside (3), methyl gallate (4) and ethyl gallate (5) were isolated from the ethyl acetate extract of Bridelia ndellensis barks by fractionation. Compounds 1-3 showed significant inhibitory activity against snake venom phosphodiesterase-I.
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Affiliation(s)
- M Mostafa
- Department of Chemistry, University of Dhaka, Dhaka-1000, Bangladesh
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20
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Yamazaki K, Kusunose N, Fujita K, Sato H, Asano S, Dan A, Kanaoka M. Identification of phosphodiesterase-1 and 5 dual inhibitors by a ligand-based virtual screening optimized for lead evolution. Bioorg Med Chem Lett 2005; 16:1371-9. [PMID: 16337379 DOI: 10.1016/j.bmcl.2005.11.046] [Citation(s) in RCA: 15] [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: 08/11/2005] [Revised: 10/31/2005] [Accepted: 11/14/2005] [Indexed: 11/15/2022]
Abstract
We identified new lead candidates which showed potent dual inhibition against phosphodiesterase-1 and 5 by a ligand-based virtual screening optimized for lead evolution. This virtual screening method, consisting of classification and regression tree analysis using 168 2-center pharmacophore descriptors and 12 macroscopic descriptors, demonstrated a high predictive ability for bioactivity of new chemical compounds. The obtained lead candidates were structurally diverse, although only the structure-activity relationship data of hydroxamic acid derivatives were used to configure the prediction model for the virtual screening.
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Affiliation(s)
- Kazuto Yamazaki
- Sumitomo Pharmaceuticals Co., Ltd, 1-98, Kasugade Naka 3-Chome, Konohana-ku, Osaka 554-0022, Japan.
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21
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Abstract
Sildenafil, the active ingredient in Viagra, has been purified from commercially available tablets. The purification, using Sephadex G25 chromatography under conditions of low ionic strength, is simple and inexpensive. Sildenafil purified according to this protocol has been characterized with respect to its IC50 for PDE5, its ultraviolet absorption profile, and by collision-induced dissociation fingerprinting, positive ion nanospray, and MALDI mass spectrometry. Tritated sildenafil (6 Ci/mmol) was prepared commercially using the sildenafil purified by this protocol and was verified to retain the potency of unlabeled sildenafil. This protocol and similar procedures will allow investigators to easily isolate sufficient amounts of sildenafil or other PDE5 inhibitors for conducting biochemical and in vitro studies of drug action.
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Affiliation(s)
- S H Francis
- Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232-0615, USA.
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22
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Ahmad VU, Abbasi MA, Hussain H, Akhtar MN, Farooq U, Fatima N, Choudhary MI. Phenolic glycosides from Symplocos racemosa: natural inhibitors of phosphodiesterase I. Phytochemistry 2003; 63:217-220. [PMID: 12711144 DOI: 10.1016/s0031-9422(03)00075-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
One new phenolic glycoside named benzoylsalireposide (1) along with one known phenolic glycoside named salireposide (2) have been isolated from Symplocos racemosa. Four other known compounds i.e. beta-amyrin (3), oleonolic acid (4), beta-sitosterol (5) and beta-sitosterol glycoside (6) were also isolated from this plant. The structure elucidation of the isolated compounds was based primarily on 1D- and 2D-NMR analysis, including COSY, HMQC, and HMBC correlations. The compound 1 and 2 showed inhibitory activity against snake venom phosphodiesterase I.
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Affiliation(s)
- Viqar Uddin Ahmad
- H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan.
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23
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Fatima N, Tapondjou LA, Lontsi D, Sondengam BL, Choudhary MI. Quinovic acid glycosides from Mitragyna stipulosa--first examples of natural inhibitors of snake venom phosphodiesterase I. Nat Prod Lett 2002; 16:389-93. [PMID: 12462343 DOI: 10.1080/10575630290033169] [Citation(s) in RCA: 16] [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: 10/26/2022]
Abstract
Phytochemical investigations on the non-alkaloidal extracts of Mitragyna stipulosa bark has led to the isolation of a series of triterpenoids mainly consisting of quinovic acid ([structure: see text]) and its glycoside derivatives [structure: see text] and [structure: see text]. The other constituents isolated include alpha-amyrin, 3beta-acetyl ursolic acid and a mixture of oleanolic and ursolic acid and beta-sitosterol glucopyranoside. Their structures were identified by spectral and chemical studies and compounds [structure: see text] and [structure: see text] were, respectively, identified as quinovic acid 3-O-[beta-D-glucopyranoside] (quinovin glycoside C) and quinovic acid 3-O-[beta-D-quinovopyranoside]-27-O-[beta-D-glucopyranosyl] ester. Compounds [structure: see text] and [structure: see text] showed significant inhibitory activity against snake venom phosphodiesterase I.
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Affiliation(s)
- Naheed Fatima
- HEJ Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan
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Dal Piaz V, Castellana MC, Vergelli C, Giovannoni MP, Gavaldà A, Segarra V, Beleta J, Ryder H, Palacios JM. Synthesis and evaluation of some pyrazolo[3,4-d]pyridazinones and analogues as PDE 5 inhibitors potentially useful as peripheral vasodilator agents. J Enzyme Inhib Med Chem 2002; 17:227-33. [PMID: 12530475 DOI: 10.1080/1475636021000008494] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Abstract
A series of pyrazolo[3,4-d]pyridazinones and analogues, potentially useful as peripheral vasodilators, were synthesized and evaluated as inhibitors of PDE5 extracted from human platelets. Several of them showed IC50 values in the range 0.14-1.4 microM. A good activity and selectivity profile versus PDE6 was found for compound 11e (6-benzyl-3-methyl-1-isopropyl-4-phenylpyrazolo[3,4-d] pyridazin-7(6H)-one). Structure-activity relationship studies demonstrated the essential role played by the benzyl group at position-6 of the pyrazolopyridazine system. Other types of pyridazinones fused with five and six membered heterocycles (pyrrole, isoxazole, pyridine and dihydropyridine), as well as some open models were prepared and evaluated. Besides the pyrazole, the best fused systems proved to be isoxazole and pyridine.
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Affiliation(s)
- Vittorio Dal Piaz
- Dipartimento di Scienze Farmaceutiche, Via G. Capponi 9, 50121 Firenze, Italy.
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25
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Moon TC, Lee JH, Lee SH, Park YK, Baek SH, Chan HW. Detection and characterization of a type IIA secretory phospholipase A2 inhibitory protein in human amniotic fluid. Biol Pharm Bull 2000; 23:1163-6. [PMID: 11041244 DOI: 10.1248/bpb.23.1163] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two types of phospholipase A2 (PLA2) inhibitory protein (PLIP-I, PLIP-II) were detected and isolated from human amniotic fluid by Sephacryl S300 gel filtration chromatography. The lower molecular weight-fraction (PLIP-II) was further purified by Sephadex G75 gel filtration and analyzed by SDS-PAGE. Its molecular weight was estimated to be approximately 18 kDa, and it was sensitive to heat treatment. Inhibition of phospholipase A2 (sPLA2 type IIA) by PLIP-II occurred in a dose-dependent manner (IC50 about 0.82/microm), and the effect was stronger on sPLA2 IIA than on pancreatic sPLA2 (IC50 about 3.11 microL). The ratio of the inhibitions of the sPLA2 IIA by PLIP-II remained consistent over an entire range of substrate concentrations. Furthermore, addition of excess Ca2+ at concentrations of up to 10 mm did not antagonize the inhibitory activity of PLIP-II.
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Affiliation(s)
- T C Moon
- College of Pharmacy, Yeungnam University, Kyongsan, Korea
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26
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Amenomori H, Sasaki S, Hiraoka K, Morimoto Y, Gando S, Kemmotsu O. Phosphodiesterase III inhibitor olprinone chlorate is not significantly removed by continuous venovenous hemodiafiltration. ASAIO J 2000; 46:635-8. [PMID: 11016521 DOI: 10.1097/00002480-200009000-00024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/25/2022] Open
Abstract
The study objective was to determine whether a phosphodiesterase III inhibitor, olprinone chlorate, is effectively removed by continuous venovenous hemodiafiltration (CVVHDF) in a patient with cardiac and renal failure. The patient was a 73 year old man who had undergone coronary artery bypass grafting for ischemic heart disease and who developed cardiac and renal failure postoperatively. A 0.2 microg/kg per minute dosage of olprinone chlorate was administered intravenously for 120 minutes while the patient was treated with CVVHDF. Samples from the arterial and venous blood catheters and those from the ultradiafiltrate for 12 hours were collected to calculate pharmacokinetic parameters and clearance of hemodiafiltration. The calculated parameters were as follows: half-life of elimination phase: 4.96 hours; total clearance 3.40 ml/min per kg. The clearance of CVVHDF was 0.33 ml/min per kg. The olprinone chlorate clearance of CVVHDF approximates only 10% of total clearance in this case. CVVHDF may not produce significant reduction in the serum olprinone chlorate level. It is recommended that the infusion dosage of olprinone chlorate should be reduced when given to patients with renal failure even if treated with CVVHDF.
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Affiliation(s)
- H Amenomori
- Division of Intensive Care, Hokkaido University Hospital, Sapporo, Japan
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Korn C, Meiss G, Gast F, Gimadutdinow O, Urbanke C, Pingoud A. Genetic engineering of Escherichia coli to produce a 1:1 complex of the anabaena sp. PCC 7120 nuclease NucA and its inhibitor NuiA. Gene 2000; 253:221-9. [PMID: 10940560 DOI: 10.1016/s0378-1119(00)00267-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A series of T7-promoter based bicistronic expression vectors was constructed in order to produce the complex of the Anabaena sp. PCC 7120 DNA/RNA non-specific nuclease NucA and its inhibitor NuiA. With all constructs, tandem expression of nucA and nuiA results in aggregation and inclusion body formation of NucA, independent of the order of the genes, the relative expression of the two proteins and the temperature applied during expression. Two constructs in which nuiA is the first and nucA the second cistron lead to an approximately one order of magnitude higher expression of nuiA compared with nucA. In these cells inclusion bodies are formed which contain NucA and NuiA in a 1:1 molar ratio. The complex can be solubilized with 6M urea after disruption of the cells by sonication, renatured by dialysis and purified to homogeneity. 2mg of the complex are obtained from 1l Escherichia coli culture. As shown by gel filtration and analytical ultracentrifugation, our system leads to a highly pure and homogeneous complex preparation, as required for biophysical and structural studies. Thus, our new method is a superior alternative for the production of the NucA/NuiA complex in which separately produced nuclease and inhibitor are mixed, and an excess of one or the other component, as well as aggregates of NucA, have to be removed from the preparation.
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Affiliation(s)
- C Korn
- Institut für Biochemie, Fachbereich Biologie, Chemie und Geowissenschaften, Justus-Liebig-Universität, Heinrich-Buff-Ring 58, D-35392, Giessen, Germany
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Okumura K, Inoue S, Ikeda K, Hayashi K. cDNA cloning and bacterial expression of phospholipase A(2) inhibitor PLIalpha from the serum of the Chinese mamushi, Agkistrodon blomhoffii siniticus(1). Biochim Biophys Acta 1999; 1441:51-60. [PMID: 10526227 DOI: 10.1016/s1388-1981(99)00141-9] [Citation(s) in RCA: 17] [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: 11/19/2022]
Abstract
The cDNA encoding of a phospholipase A(2) inhibitor (PLIalpha) of the Chinese mamushi, Agkistrodon blomhoffii siniticus, was identified from a liver cDNA library by use of a probe prepared by polymerase chain reaction (PCR) on the basis of the amino acid sequence of PLIalpha. It encoded a polypeptide of 166 amino acid residues, including 19 residues of the signal sequence and 147 residues of the complete mature sequence of PLIalpha. The PLIalpha cDNA was subcloned into the expression vector pET-16b and used to transform Escherichia coli strain BL21(DE3)pLysS. The recombinant PLIalpha expressed as a fusion protein was solubilized and purified to homogeneity by use of a metal affinity resin. The purified PLIalpha fusion protein underwent folding to form a trimeric structure like the intact PLIalpha, and showed inhibitory activity against the group II acidic PLA(2) from A. blomhoffii siniticus venom; although its binding constant (1/K(i)) value was 30-fold lower than that of the natural PLIalpha. The elimination of the N-terminal additional peptide from the fusion protein resulted in a marked increase in the inhibition activity with a binding constant comparable to that of the natural PLIalpha against the acidic PLA(2). Furthermore, the carbohydrate chains of the natural PLIalpha were found to play an important role in the inhibitory activity against the basic PLA(2).
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Affiliation(s)
- K Okumura
- Department of Biochemistry, Osaka University of Pharmaceutical Sciences, Nasahara, Takatsuki, Osaka, Japan
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Tsuge K, Ano T, Hirai M, Nakamura Y, Shoda M. The genes degQ, pps, and lpa-8 (sfp) are responsible for conversion of Bacillus subtilis 168 to plipastatin production. Antimicrob Agents Chemother 1999; 43:2183-92. [PMID: 10471562 PMCID: PMC89444 DOI: 10.1128/aac.43.9.2183] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacillus subtilis YB8 produces the lipopeptide antibiotic plipastatin. B. subtilis MI113, which is a derivative of strain 168, was converted into a new plipastatin producer, strain 406, by competence transformation with the chromosomal DNA of YB8. Transposon mini-Tn10 insertional mutagenesis was applied to strain 406, which revealed that lpa-8 (sfp) (encoding 4'-phosphopantetheinyl transferase) and the pps operon (located between 167 and 171 degrees ) are essential for plipastatin production. The pps operon was previously suggested to encode putative peptide synthetases (A. Tognoni, E. Franchi, C. Magistrelli, E. Colombo, P. Cosmina, and G. Grandi, Microbiology 141:645-648, 1995) and was thought to be the fengycin operon (V. Tosato, A. M. Albertini, M. Zotti, S. Sonda, and C. V. Bruschi, Microbiology 143:3443-3450, 1997). We claim that the pps operon is the pli operon, encoding plipastatin synthetase. By using a new high-performance liquid chromatography system, we revealed that strain 168 expressing only lpa-8 can also produce plipastatin, although the yield is very low. However, the introduction of the pleiotropic regulator degQ of strain YB8 into strain 168 expressing lpa-8 resulted in a 10-fold increase in the production of plipastatin.
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Affiliation(s)
- K Tsuge
- Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Abstract
This work compares the inhibition of cAMP-phosphodiesterase in rat adipose tissue by a mixture of Ginkgo biloba biflavones with the effect of individual dimeric flavonoids. The degree of enzyme inhibition by G. biloba biflavones was amentoflavone > bilobetin > sequoiaflavone > ginkgetin = isoginkgetin. Sciadopitysin was almost inactive.
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Affiliation(s)
- R Saponara
- Institute of Pharmacological Sciences, Faculty of Pharmacy, Via Balzaretti 9, 20133 Milan, Italy
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Kinoshita K, Sasaki T, Awata M, Takada M, Yaginuma S. Structure of sporostatin (M5032), an inhibitor of cyclic adenosine 3',5'-monophosphate phosphodiesterase. J Antibiot (Tokyo) 1997; 50:961-4. [PMID: 9592571 DOI: 10.7164/antibiotics.50.961] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- K Kinoshita
- Institute for Life Science Research, Asahi Chemical Industry Co., Ltd., Shizuoka, Japan
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Ohkura N, Okuhara H, Inoue S, Ikeda K, Hayashi K. Purification and characterization of three distinct types of phospholipase A2 inhibitors from the blood plasma of the Chinese mamushi, Agkistrodon blomhoffii siniticus. Biochem J 1997; 325 ( Pt 2):527-31. [PMID: 9230137 PMCID: PMC1218591 DOI: 10.1042/bj3250527] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.3] [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: 02/04/2023]
Abstract
Three distinct types of phospholipase A2 (PLA2) inhibitory proteins (PLIalpha, PLIbeta, and PLIgamma) were isolated from the blood plasma of the Chinese mamushi, Agkistrodon blomhoffii siniticus. PLIalpha is an inhibitor that we have already purified and whose amino acid sequence we have already determined [Ohkura, Inoue, Ikeda and Hayashi (1993) J. Biochem. (Tokyo) 113, 413-419]. It inhibited selectively the group-II acidic PLA2s from Crotalidae venom. PLIbeta was a 160-kDa glycoprotein having a trimeric structure composed of 50-kDa subunits. The amino acid sequence of the first 30 amino acids of the N-terminal part of the 50-kDa subunit was determined and found to have no significant homology to that of known proteins. PLIbeta was a selective inhibitor against the group-II basic PLA2s from Crotalidae venom. Some amino acid residues located in or close to the interfacial binding surface of the group-II basic PLA2s were suggested to be involved in selective binding to PLIbeta. PLIgamma was a 100-kDa glycoprotein containing 25-kDa and 20-kDa subunits and inhibited all of the PLA2s investigated equally, including Elapidae venom PLA2s (group I), Crotalidae and Viperidae venom PLA2s (group II) and honey-bee PLA2 (group III). From the N-terminal sequences of the two subunits, PLIgamma was found to be the same type of PLI that had been purified from Thailand cobra plasma.
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Affiliation(s)
- N Ohkura
- Department of Biochemistry, Osaka University of Pharmaceutical Sciences, Nasahara, Takatsuki, Osaka 569-11, Japan
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Abstract
Many filamentous, heterocyst-forming cyanobacteria express a sugar-non-specific nuclease of about 29 kDa that can be detected in DNA-containing SDS-PAGE gels. The nucA gene encoding this nuclease has previously been cloned from Anabaena sp. PCC 7120, sequenced and expressed in Escherichia coli. The NucA protein bears a putative signal peptide close to its N-terminal end and, in Anabaena cultures, is present in both the cells and the extracellular medium. Cell-free extracts of different cyanobacteria producing NucA-like nucleases exhibited an inhibitory activity on NucA. In Anabaena sp. PCC 7120, this inhibition was exerted by protein(s) or protein-containing molecule(s) that were heat resistant. Immediately downstream from the nucA gene, in the complementary strand, we have identified an open reading frame composed of 135 codons, that we have named nuiA, whose expression in E. coli conferred heat-resistant NucA-inhibitory activity to cell-free extracts. The NuiA protein was purified to homogeneity, and purified NuiA inhibited the nuclease activity of NucA. Sequences hybridizing with the nuiA gene have been found in all the tested cyanobacterial strains that express a NucA-like nuclease. Whereas the NucA protein is homologous to endonuclease G from vertebrates and to nucleases from Serratia marcescens and yeast, no protein homologous to NuiA was found in the available databases. Therefore, nuiA represents a novel gene encoding a nuclease inhibitor.
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Affiliation(s)
- A M Muro-Pastor
- Instituto de Bioquímica Vegetal y Fotosíntesis, C.S.I.C.-Universidad de Sevilla, Centro de Investigaciones, Spain
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Amschler G, Frahm AW, Hatzelmann A, Kilian U, Müller-Doblies D, Müller-Doblies U. Constituents of Veltheimia viridifolia; I. Homoisoflavanones of the bulbs. Planta Med 1996; 62:534-539. [PMID: 9000886 DOI: 10.1055/s-2006-957964] [Citation(s) in RCA: 29] [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] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The new homoisoflavanone R(-)-3-(4-hydroxybenzyl)-5-hydroxy-6, 7,8-trimethoxychroman-4-one (1) was isolated from the petroleum ether and the diethyl ether extracts of the bulbs of Veltheimia viridifolia (Hyacinthaceae) together with the known homoisoflavanone muscomin (2). The structures of the compounds were elucidated by means of 1H-NMR, 2D 1H-1H-COSY, 13C-NMR, HMQC, HMBC, mass, and CD spectra. Pharmacological testings of the new homoisoflavanone are reported.
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Affiliation(s)
- G Amschler
- Lehrstuhl für Pharmazeutische Chemie, Universität Freiburg, Germany
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Abstract
We isolated fluvirucin B2 from the culture broth of Streptomyces as an inhibitor of phosphatidylinositol-specific phospholipase C (PI-PLC). It inhibited PI-PLC of A431 cell cytosol with an IC50 of 1.6 micrograms/ml. Fluvirucin B2 also inhibited PI-PLC in cultured A431 cells, whereas it did not inhibit phosphatidylinositol synthesis and macromolecular synthesis markedly. It also inhibited epidermal growth factor-induced rapid rounding of A431 cells, in which PI turnover is involved.
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Affiliation(s)
- H Ui
- Department of Applied Chemistry, Faculty of Science and Technology, Keio University, Yokohama
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36
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Abstract
A novel compound, PS-990, which induces differentiation of neuroblastoma cells, was isolated from the culture broth of a fungus, Acremonium sp. KY12702. PS-990 inhibited brain calcium calmodulin-dependent cyclic nucleotide phosphodiesterase with an IC50 value of 3 micrograms/ml, and markedly induced neurite extension of mouse neuroblastoma, Neuro2A, at concentrations ranging from 10 to 30 micrograms ml.
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Affiliation(s)
- S Toki
- Tokyo Research Laboratories, Kyowa Hakko Kogyo Co. Ltd., Japan
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Yang P, Li S, Pan S, Cao X, Xie C, Liang S, Huang X, Mao W. [Amino acid analysis of retinal S-antigen and interphotoreceptor retinoid-binding protein]. Yan Ke Xue Bao 1993; 9:203-7. [PMID: 7957858] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Retinal S-antigen and interphotoreceptor retinoid-binding protein (IRBP) were purified by DEAE-Sephacel ionexchange chromatography and Con A Sepharose affinity chromatography. Amino acid analysis of the S-antigen and IRBP was carried out and compared with that presented by others. The possible reason for difference with regard to some amino acids and related problems were analyzed and discussed.
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Affiliation(s)
- P Yang
- Zhongshan Ophthalmic Center, Sun Yat-Sen University of Medical Sciences, Guangzhou, China
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38
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Ritzau M, Philipps S, Zeeck A, Hoff H, Zähner H. Metabolic products of microorganisms. 268. Obscurolides, a novel class of phosphodiesterase inhibitors from streptomyces. II. Minor components belonging to the obscurolide B to D series. J Antibiot (Tokyo) 1993; 46:1625-8. [PMID: 8244895 DOI: 10.7164/antibiotics.46.1625] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- M Ritzau
- Institut für Organische Chemie, Universität Göttingen, Germany
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Hoff H, Drautz H, Fiedler HP, Zähner H, Schultz JE, Keller-Schierlein W, Philipps S, Ritzau M, Zeeck A. Metabolic products of microorganisms. 261. Obscurolides, a novel class of phosphodiesterase inhibitors from streptomyces. I. Production, isolation, structural elucidation and biological activity of obscurolides A1 to A4. J Antibiot (Tokyo) 1992; 45:1096-107. [PMID: 1325435 DOI: 10.7164/antibiotics.45.1096] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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: 12/26/2022]
Abstract
A novel class of butyrolactones, named obscurolides, was isolated from the culture filtrate of Streptomyces viridochromogenes by chemical screening methods. The structural elucidation of the obscurolides A1 to A4 (1 approximately 4) is described. The carboxy group of the 4-aminobenzoic acid moiety of obscurolide A1 (1) is reduced in the other compounds. The isolated natural products have been proved to be diastereomeric mixtures by a partial racemization at C-7 which belongs to an allylic alcohol system. The obscurolides showed a weak inhibitory activity against calcium/calmodulin-dependent and independent phosphodiesterases from bovine.
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Affiliation(s)
- H Hoff
- Biologisches Institut, Universität Tübingen, Germany
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40
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Wacker WB. Proctor Lecture. Experimental allergic uveitis. Investigations of retinal autoimmunity and the immunopathologic responses evoked. Invest Ophthalmol Vis Sci 1991; 32:3119-28. [PMID: 1721045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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41
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Ikeda Y, Sugiura M, Fukaya C, Yokoyama K, Hashimoto Y, Kawanishi K, Moriyasu M. Periandradulcins A, B and C: phosphodiesterase inhibitors from Periandra dulcis Mart. Chem Pharm Bull (Tokyo) 1991; 39:566-71. [PMID: 2070439 DOI: 10.1248/cpb.39.566] [Citation(s) in RCA: 22] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
During the course of our screening of bioactive natural products, three new saponins named periandradulcins A (1), B (2) and C (3) were isolated as phosphodiesterase (PDE, EC 3.1.4.17) inhibitors from 80% MeOH extract of the roots of Periandra dulcis Mart. (Leguminosae) by a combination of column chromatography and reversed- and normal-phase high-performance liquid chromatography (HPLC). On the basis of 1H-, 13C- and two-dimensional nuclear magnetic resonance (NMR) spectral data and chemical evidence, their chemical structures were characterized as 3-O-beta-[alpha-L-rhamnopyranosyl(1----2)-beta-D-xylopyranosyl(1----2)-b eta-D- glucuronopyranosyl]-30-hydroxyl-25-formylolean-18-ene-22 beta-O-syringate, 3-O-beta-[alpha-L-rhamnopyranosyl(1----2)-beta-D- xylopyranosyl(1----2)-beta-D-glucuronopyranosyl]-22 beta-hydroxyl-25- formylolean-12-ene and 3-O-beta-[alpha-L-rhamnopyranosyl(1----2)-beta-D- glucopyranosyl(1----2)-beta-D-glucuronopyranosyl]-22 beta-hydroxyl-25-formylolean-18-ene, respectively. The concentrations of periandradulcins A, B and C required to give 50% inhibition (IC50 values) of PDE from bovine heart, were 0.033, 7.6 and 7.7 microM, respectively. Compound 1 was the most potent among the known PDE inhibitors; it inhibited PDE-I (IC50:0.0022 microM) twenty and forty times more effectively than PDE-II and -III, respectively.
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Affiliation(s)
- Y Ikeda
- Research Division, Green Cross Corp., Osaka, Japan
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Mirshahi M, Nato A, Razaghi A, Mirshahi A, Faure JP. [Presence of arrestin (S-antigen)-like proteins in vegetable cells]. C R Acad Sci III 1991; 312:441-8. [PMID: 1905970] [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] [Subscribe] [Scholar Register] [Indexed: 03/26/2023]
Abstract
Arrestin (or S-antigen) is a protein that regulates phototransduction in photoreceptor cells of the retina. Homologous proteins have been recently detected in other, non-photosensitive, cells of vertebrates, where they are thought to be associated with other systems of signal transduction. Proteins crossreactive with retinal arrestin were detected in soluble cell extracts from Nicotiana tabacum and Chlamydomonas reinhardtii by immunoblotting using several antibodies against arrestin. Variations of the immunoreactive protein pattern were associated with the growth cycle of tobacco cells. These observations suggest that analogs of arrestin exist in the vegetal kingdom, where they could be involved in transduction processes.
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Affiliation(s)
- M Mirshahi
- Unité n. 86 de l'I.N.S.E.R.M., Centre de Recherches biomédicales des Cordeliers, Paris
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Matsuda Y, Kase H. KS-619-1, a new inhibitor of Ca2+ and calmodulin-dependent cyclic nucleotide phosphodiesterase from Streptomyces californicus. J Antibiot (Tokyo) 1987; 40:1104-10. [PMID: 3680022 DOI: 10.7164/antibiotics.40.1104] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [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: 01/06/2023]
Abstract
KS-619-1, a new inhibitor of Ca2+ and calmodulin-dependent cyclic nucleotide phosphodiesterase, was isolated from the cultured broth of Streptomyces californicus. KS-619-1 has an anthraquinone moiety. IC50 values for the effect of KS-619-1 on Ca2+ and calmodulin-stimulated activity of bovine brain and heart enzymes were 2.0 and 1.5 microM, respectively. On the other hand, basal activity (the activity in the presence of ethylene bis(oxyethylenenitrilo)tetraacetic acid (EGTA) instead of Ca2+/calmodulin) of the bovine brain enzyme, calmodulin-independent cyclic nucleotide phosphodiesterase from bovine heart, and protein kinase C from rat brain were inhibited by KS-619-1 to a lesser extent with IC50 values; 12.3, 25.9 and 151 microM, respectively.
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Affiliation(s)
- Y Matsuda
- Tokyo Research Laboratories, Kyowa Hakko Kogyo Co., Ltd., Japan
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46
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Abstract
Stabilization of cyclic adenosine 3',5'-monophosphate (cAMP)-phosphodiesterase (PDE) in 50% glycerol made possible the removal of endogenous inhibitors from tissue extracts by dialysis and the storage of the extracts at -20 degrees C without loss of PDE activity. Dialysates of heat-inactivated epididymal extracts were fractionated by liquid chromatography, and 4 fractions-F2, F5, F7, and F12-were found to contain endogenous inhibitors of PDE. The masses of the fractions required to inhibit low-Km PDE activity by ca. 50% in 430-microliter incubation mixtures were F2, 89 micrograms; F5, 23 micrograms; F7, 275 micrograms; and F12, 1.2 mg. The mechanisms of inhibition of low-Km PDE by the endogenous inhibitors were investigated by kinetic analysis of enzyme-inhibitor interaction. F2 and F12 inhibited PDE competitively; F5 and F7 decreased both apparent Km and Vmax, suggesting an uncompetitive mechanism of inhibition. The high potency of F5 in low concentration suggests that it may be a physiological modulator of low-Km cAMP-PDE activity.
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Jedlicki E, Orellana O, Allende CC, Allende JE. A protein inhibitor of calmodulin-regulated cyclic nucleotide phosphodiesterase in amphibian ovaries. Arch Biochem Biophys 1985; 241:215-24. [PMID: 2992390 DOI: 10.1016/0003-9861(85)90377-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The cytosol fraction of an extract of Xenopus laevis ovaries contains a protein inhibitor that can specifically block the activation of calmodulin-sensitive cyclic nucleotide phosphodiesterase (PDE I) found in that tissue. This inhibitor was purified by DEAE-cellulose chromatography, gel filtration on Sephacryl S-200, and affinity chromatography on calmodulin-Sepharose. It has a molecular weight of approximately 90,000, and is heat-labile and susceptible to inactivation by chymotrypsin. The inhibitor blocks calmodulin activation of cyclic nucleotide phosphodiesterases from amphibian ovary and bovine brain and of the myosin light chain kinase from rabbit smooth muscle, but does not affect the activity of a calmodulin-insensitive cyclic nucleotide phosphodiesterase. The inhibitor not only affects the activation of Xenopus PDE I and of the bovine brain phosphodiesterase by calmodulin, but also inhibits the stimulation of these enzymes by lysophosphatidylcholine. The inhibitor also acts on PDE I activated by partial tryptic proteolysis, but the enzyme fully activated by trypsin is only slightly susceptible to inhibition by this protein. The inhibition of PDE I activation caused by this ovarian factor can be reversed by adding excess amounts of calmodulin or lysophosphatidylcholine. The presence of this inhibitor provides a possible explanation for the previously observed inactivity of PDE I in vivo.
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Dicou E, Brachet P. Interaction of the inhibitor of the 3',5' cyclic AMP phosphodiesterase of Dictyostelium discoideum with the Affi-Gel blue. Biochem Biophys Res Commun 1981; 102:1172-9. [PMID: 6274332 DOI: 10.1016/s0006-291x(81)80135-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Iwasa Y, Yonemitsu K, Matsui K, Fukunaga K, Miyamoto E. A heat-stable inhibitor protein for bovine brain cyclic nucleotide phosphodiesterase from Escherichia coli. FEBS Lett 1981; 128:311-4. [PMID: 6266875 DOI: 10.1016/0014-5793(81)80105-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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