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Noguchi-Shinohara M, Murakami H, Sakashita Y, Mori Y, Komatsu J, Muramatsu D, Hikishima S, Ono K. Plasma amyloid-β biomarkers are associated with Alzheimer's disease comorbidity in Lewy body disease. Parkinsonism Relat Disord 2023; 111:105445. [PMID: 37201326 DOI: 10.1016/j.parkreldis.2023.105445] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 05/20/2023]
Abstract
No blood biomarkers which can identify Alzheimer's disease pathology in Lewy body disease (LBD) have ever been established. We showed that the plasma amyloid-β (Aβ) 1-42/Aβ1-40 ratio was significantly decreased in patients with Aβ+ LBD compared with those with Aβ- LBD and it might be a useful biomarker.
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Affiliation(s)
- Moeko Noguchi-Shinohara
- Department of Neurology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Hidetomo Murakami
- Department of Neurology, School of Medicine, Showa University, Tokyo, Japan
| | - Yasuhiro Sakashita
- Department of Neurology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Yukiko Mori
- Department of Neurology, School of Medicine, Showa University, Tokyo, Japan
| | - Junji Komatsu
- Department of Neurology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan; Department of Preemptive Medicine for Dementia, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Daiki Muramatsu
- Department of Neurology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Sadao Hikishima
- Department of Neurology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan
| | - Kenjiro Ono
- Department of Neurology, Kanazawa University Graduate School of Medical Sciences, Kanazawa, Japan.
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Hikishima S, Sakai K, Akagi A, Yamaguchi H, Shibata S, Hayashi K, Nakano H, Kanemoto M, Usui Y, Taniguchi Y, Komatsu J, Nakamura-Shindo K, Nozaki I, Hamaguchi T, Ono K, Iwasa K, Yamada M. Deterioration after Liver Transplantation and Transthyretin Stabilizer Administration in a Patient with ATTRv Amyloidosis with a Leu58Arg (p.Leu78Arg) TTR Variant. Intern Med 2022; 61:2347-2351. [PMID: 35283385 PMCID: PMC9424092 DOI: 10.2169/internalmedicine.8945-21] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We herein report a 44-year-old Japanese man with hereditary transthyretin amyloidosis (ATTRv amyloidosis) harboring the variant Leu58Arg (p.Leu78Arg) in TTR in whom we conducted an observational study with liver transplantation (LT) and transthyretin (TTR) stabilizers (tafamidis and diflunisal) for 9 years. This patient showed gradual deterioration of sensory, motor, and autonomic neuropathy symptoms after LT. Furthermore, cardiac amyloidosis gradually developed. Although the present case showed deterioration of the symptoms after disease-modifying treatments, LT might be suitable in patients with the same variant if they are young and in good condition due to a long survival after LT.
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Affiliation(s)
- Sadao Hikishima
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Kenji Sakai
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Akio Akagi
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Hiroki Yamaguchi
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Shutaro Shibata
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Koji Hayashi
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Hiroto Nakano
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Mizuki Kanemoto
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Yuta Usui
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Yu Taniguchi
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Junji Komatsu
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Keiko Nakamura-Shindo
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Ichiro Nozaki
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Tsuyoshi Hamaguchi
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Kenjiro Ono
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Kazuo Iwasa
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
| | - Masahito Yamada
- Department of Neurology and Neurobiology of Aging, Kanazawa University Graduate School of Medical Sciences, Japan
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Wielgus-Kutrowska B, Breer K, Hashimoto M, Hikishima S, Yokomatsu T, Narczyk M, Dyzma A, Girstun A, Staroń K, Bzowska A. Trimeric purine nucleoside phosphorylase: Exploring postulated one-third-of-the-sites binding in the transition state. Bioorg Med Chem 2012; 20:6758-69. [DOI: 10.1016/j.bmc.2012.08.045] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 08/24/2012] [Indexed: 11/28/2022]
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4
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Breer K, Wielgus-Kutrowska B, Hashimoto M, Hikishima S, Yokomatsu T, Szczepanowski RH, Bochtler M, Girstun A, Starón K, Bzowska A. Thermodynamic studies of interactions of calf spleen PNP with acyclic phosphonate inhibitors. ACTA ACUST UNITED AC 2010:663-4. [PMID: 18776554 DOI: 10.1093/nass/nrn335] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The Gibbs binding energy and entropy/enthalpy contributions to the interaction of calf spleen purine nucleoside phosphorylase (PNP) with the novel multisubstrate analogue DFPP-DG, as well as with DFPP-G and (S)-PMP-DAP were determined by fluorescence and calorimetric studies. Results were compared with findings for guanine - a natural reaction product and inhibitor.
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Affiliation(s)
- Katarzyna Breer
- Department of Biophysics, Institute of Experimental Physics, University of Warsaw, Zwirki i Wigury 93, 02-089 Warsaw, Poland
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Breer K, Glavas-Obrovac L, Suver M, Hikishima S, Hashimoto M, Yokomatsu T, Wielgus-Kutrowska B, Magnowska L, Bzowska A. 9-Deazaguanine derivatives connected by a linker to difluoromethylene phosphonic acid are slow-binding picomolar inhibitors of trimeric purine nucleoside phosphorylase. FEBS J 2010; 277:1747-60. [PMID: 20193043 DOI: 10.1111/j.1742-4658.2010.07598.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Genetic deficiency of purine nucleoside phosphorylase (PNP; EC 2.4.2.1) activity leads to a severe selective disorder of T-cell function. Therefore, potent inhibitors of mammalian PNP are expected to act as selective immunosuppressive agents against, for example, T-cell cancers and some autoimmune diseases. 9-(5',5'-difluoro-5'-phosphonopentyl)-9-deazaguanine (DFPP-DG) was found to be a slow- and tight-binding inhibitor of mammalian PNP. The inhibition constant at equilibrium (1 mm phosphate concentration) with calf spleen PNP was shown to be = 85 +/- 13 pm (pH 7.0, 25 degrees C), whereas the apparent inhibition constant determined by classical methods was two orders of magnitude higher ( = 4.4 +/- 0.6 nm). The rate constant for formation of the enzyme/inhibitor reversible complex is (8.4 +/- 0.5) x 10(5) m(-1).s(-1), which is a value that is too low to be diffusion-controlled. The picomolar binding of DFPP-DG was confirmed by fluorimetric titration, which led to a dissociation constant of 254 pm (68% confidence interval is 147-389 pm). Stopped-flow experiments, together with the above data, are most consistent with a two-step binding mechanism: E + I <--> (EI) <--> (EI)*. The rate constants for reversible enzyme/inhibitor complex formation (EI), and for the conformational change (EI) <--> (EI)*, are k(on1) = (17.46 +/- 0.05) x 10(5) m(-1).s(-1), k(off1) = (0.021 +/- 0.003) s(-1), k(on2) = (1.22 +/- 0.08) s(-1) and k(off2) = (0.024 +/- 0.005) s(-1), respectively. This leads to inhibition constants for the first (EI) and second (EI)* complexes of K(i) = 12.1 nM (68% confidence interval is 8.7-15.5 nm) and = 237 pm (68% confidence interval is 123-401 pm), respectively. At a concentration of 10(-4) m, DFPP-DG exhibits weak, but statistically significant, inhibition of the growth of cell lines sensible to inhibition of PNP activity, such as human adult T-cell leukaemia and lymphoma (Jurkat, HuT78 and CCRF-CEM). Similar inhibitory activities of the tested compound were noted on the growth of lymphocytes collected from patients with Hashimoto's thyroiditis and Graves' disease. The observed weak cytotoxicity may be a result of poor membrane permeability.
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Affiliation(s)
- Katarzyna Breer
- Department of Biophysics, Institute of Experimental Physics, Warsaw University, Poland
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6
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Hikishima S, Hashimoto M, Magnowska L, Bzowska A, Yokomatsu T. Structural-based design and synthesis of novel 9-deazaguanine derivatives having a phosphate mimic as multi-substrate analogue inhibitors for mammalian PNPs. Bioorg Med Chem 2010; 18:2275-2284. [PMID: 20189401 DOI: 10.1016/j.bmc.2010.01.062] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Revised: 01/27/2010] [Accepted: 01/28/2010] [Indexed: 10/19/2022]
Abstract
9-(5',5'-Difluoro-5'-phosphonopentyl)-9-deazaguanine (DFPP-DG) was designed as a multi-substrate analogue inhibitor against purine nucleoside phosphorylase (PNP) on the basis of X-ray crystallographic data obtained for a binary complex of 9-(5',5'-difluoro-5'-phosphonopentyl)guanine (DFPP-G) with calf-spleen PNP. DFPP-DG and its analogous compounds were synthesized by the Sonogashira coupling reaction between a 9-deaza-9-iodoguanine derivative and omega-alkynyldifluoromethylene phosphonates as a key reaction. The experimental details focused on the synthetic chemistry along with some insights into the physical and biological properties of newly synthesized DFPP-DG derivatives are disclosed.
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Affiliation(s)
- Sadao Hikishima
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Mariko Hashimoto
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
| | - Lucyna Magnowska
- Department of Biophysics, Institute of Experimental Physics, Warsaw University, Zwirki i Wigury 93, 02 089 Warsaw, Poland
| | - Agnieszka Bzowska
- Department of Biophysics, Institute of Experimental Physics, Warsaw University, Zwirki i Wigury 93, 02 089 Warsaw, Poland
| | - Tsutomu Yokomatsu
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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7
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Glavas-Obrovac L, Suver M, Hikishima S, Hashimoto M, Yokomatsu T, Magnowska L, Bzowska A. Antiproliferative activity of purine nucleoside phosphorylase multisubstrate analogue inhibitors containing difluoromethylene phosphonic acid against leukaemia and lymphoma cells. Chem Biol Drug Des 2010; 75:392-9. [PMID: 20102369 DOI: 10.1111/j.1747-0285.2009.00939.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Potent inhibitors of purine nucleoside phosphorylase (PNP) are expected to act as selective agents against T-cell tumours. Five compounds with guanine, three with hypoxanthine, and five with 9-deazaguanine, all connected by a linker with difluoromethylene phosphonic acid, were studied on their inhibitory potential against human and calf PNPs. Antiproliferative activity of these analogues against lymphocytes as well as lymphoma and leukaemia cells has been also investigated. All tested compounds act as multisubstrate analogue inhibitors of PNP with the apparent inhibition constants in the range 5-100 nm, and also show a slight antiproliferative activity. Analogues with 9-deazaguanine aglycone have better anti-leukaemic and anti-lymphoma activities compared to the guanine and hypoxanthine analogues, and applied in the concentration of 100 mum, caused a statistically significant decrease in the cell viability in all human leukaemia and lymphoma cells used. Despite the high PNP inhibitory potential of tested analogues, no differences were observed between the effects on the growth of tumour cells sensible to the inhibition of PNP, such as human adult T-cell leukaemia and lymphoma cells, and other investigated cells. Obtained poor effects on cell proliferation could be explained probably by a poor ability of tested compounds to penetrate cell membranes.
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Affiliation(s)
- Ljubica Glavas-Obrovac
- School of Medicine, J.J. Strossmayer University of Osijek and University Hospital Osijek J. Huttlera 4, Osijek, HR-31000, Croatia.
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Chojnowski G, Breer K, Narczyk M, Wielgus-Kutrowska B, Czapinska H, Hashimoto M, Hikishima S, Yokomatsu T, Bochtler M, Girstun A, Staroń K, Bzowska A. 1.45Å resolution crystal structure of recombinant PNP in complex with a pM multisubstrate analogue inhibitor bearing one feature of the postulated transition state. Biochem Biophys Res Commun 2010; 391:703-8. [DOI: 10.1016/j.bbrc.2009.11.124] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Accepted: 11/19/2009] [Indexed: 10/20/2022]
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9
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Breer K, Wielgus-Kutrowska B, Girstun A, Staroń K, Hashimoto M, Hikishima S, Yokomatsu T, Bzowska A. Overexpressed proteins may act as mops removing their ligands from the host cells: a case study of calf PNP. Biochem Biophys Res Commun 2009; 391:1203-9. [PMID: 20005207 DOI: 10.1016/j.bbrc.2009.12.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2009] [Accepted: 12/08/2009] [Indexed: 10/20/2022]
Abstract
Calf purine nucleoside phosphorylase (PNP) was overexpressed in Escherichia coli. The basic kinetic parameters of recombinant PNP were found to be similar to the values published previously for non-recombinant PNP from calf spleen. However, upon titration of the recombinant enzyme with the tight-binding multisubstrate analogue inhibitor DFPP-DG, endothermic as well as exothermic signals were obtained. This was not the case for PNP isolated from calf spleen for which only the endothermic process was observed. Further calorimetric titrations of the recombinant and non-recombinant enzyme with its potent and moderate ligands, and studied involving partial inactivation of the enzyme, lead to the conclusion that a part of the recombinant enzyme forms a complex with its product, hypoxanthine, although hypoxanthine was not present at any purification stage except for its natural occurrence in E. coli cells. Binding of hypoxanthine is accompanied with a large negative change of the free enthalpy, and therefore the replacement of this compound by DFPP-DG yields positive heat signal. Our data obtained with calf PNP indicate that similar processes--moping of ligands from the host cells--may take place in the case of other proteins with high overexpression yield.
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Affiliation(s)
- Katarzyna Breer
- Department of Biophysics, Institute of Experimental Physics, University of Warsaw, Zwirki i Wigury 93, 02-089 Warsaw, Poland
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Yamagishi T, Muronoi S, Hikishima S, Shimeno H, Soeda S, Yokomatsu T. Diastereoselective Synthesis of γ-Amino-δ-hydroxy-α,α-difluorophosphonates: A Vehicle for Structure−activity Relationship Studies on SMA-7, a Potent Sphingomyelinase Inhibitor. J Org Chem 2009; 74:6350-3. [DOI: 10.1021/jo9008782] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Soeda S, Sakata A, Ochiai T, Yasuda K, Kuramoto Y, Shimeno H, Toda A, Eyanagi R, Hikishima S, Yokomastu T, Shibuya S. Sphingomyelinase Inhibition Suggests a Possible New Strategy for the Treatment of Inflammatory Bowel Disease. CDTH 2008. [DOI: 10.2174/157488508785747853] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Yatsu T, Hashimoto M, Hikishima S, Magnowska L, Bzowska A, Yokomatsu T. 9-Deazaguanine derivatives: synthesis and inhibitory properties as multi-substrate analogue inhibitors of mammalian PNPs. ACTA ACUST UNITED AC 2008:661-2. [DOI: 10.1093/nass/nrn334] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Glavas-Obrovac L, Suver M, Hikishima S, Yokomatsu T, Bzowska A. Inhibitory properties of nucleotides with difluoromethylenephosphonic acid as a phosphate mimic versus calf spleen purine nucleoside phosphorylase and effect of these analogues on the viability of human blood lymphocytes. Nucleosides Nucleotides Nucleic Acids 2008; 26:989-93. [PMID: 18058523 DOI: 10.1080/15257770701508513] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Several cyclic and acyclic 6-keto purine nucleotides with difluoromethylenephosphonic acid as phosphate mimic are proved to be potent inhibitors of mammalian purine nucleoside phosphorylase (PNP). Antiproliferative activity of these analogues on the growth of human blood lymphocytes was tested by MTT assay. Compared to inhibitory effects on the growth of human blood T-lymphocytes isolated from healthy donors, all analogues significantly slow down proliferation of T-lymphocytes isolated from patients with autoimmune thyroid disease--Hashimoto's thyroiditis.
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Affiliation(s)
- Ljubica Glavas-Obrovac
- Clinical Hospital Osijek and School of Medicine, University of J. J. Strossmayer in Osijek, Osijek, Croatia
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Hashimoto M, Hikishima S, Magnowska L, Bzowska A, Yokomatsu T. Synthesis and evaluation of 9-deazaguanine derivatives as multi-substrate analogue inhibitors of PNP. Nucleic Acids Symp Ser (Oxf) 2007:431-2. [PMID: 18029771 DOI: 10.1093/nass/nrm216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
9-(5',5'-Difluoro-5'-phosphonopentyl)-9-deazaguanine (DFPP-DG) and its related analogues were designed as multi-substrate analogue inhibitors against purine nucleoside phosphorylase (PNP) on the basis of the X-ray crystallographic data obtained for the binary complex of 9-(5',5'-difluoro-5'-phosphonopentyl)guanine (DFPP-G) with calf-spleen PNP. One of these analogues, homo-DFPP-DG was found to be a very potent PNP inhibitor at an intracellular P(i) concentration (about 1 mM phosphate).
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Affiliation(s)
- Mariko Hashimoto
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachiouji, Tokyo 192-0392, Japan
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Hikishima S, Kuramoto K, Minakawa N, Matsuda A. Properties and application of oligodeoxynucleotides containing the naphthyridine:imidazopyridopyrimidine base pairs with the ability to form four hydrogen bonds. ACTA ACUST UNITED AC 2007:295-6. [PMID: 17150595 DOI: 10.1093/nass/48.1.295] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
As our continuing study to develop base pairing motifs which stabilize and regulate DNA structure, we designed novel 1,8-naphthyridine C-nucleosides possessing Na-O(N) and Na-N(O) bases. These C-nucleosides formed two sets of naphthyridine:imidazopyridopyrimidine base pairing motifs (Na-O(N):Im-N(O) and Na-N(O):Im-O(N)) with four hydrogen bonds, and duplexes containing the pairs were markedly thermally stabilized independent of the manner in which the new pairs are incorporated.
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Affiliation(s)
- Sadao Hikishima
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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Hikishima S, Hashimoto M, Magnowska L, Bzowska A, Yokomatsu T. Synthesis and biological evaluation of 9-deazaguanine derivatives connected by a linker to difluoromethylene phosphonic acid as multi-substrate analogue inhibitors of PNP. Bioorg Med Chem Lett 2007; 17:4173-7. [PMID: 17544667 DOI: 10.1016/j.bmcl.2007.05.054] [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: 04/03/2007] [Revised: 04/25/2007] [Accepted: 05/16/2007] [Indexed: 10/23/2022]
Abstract
9-(5',5'-difluoro-5'-phosphonopentyl)-9-deazaguanine (DFPP-DG) was designed as a multi-substrate analogue inhibitor against purine nucleoside phosphorylase (PNP) on the basis of X-ray crystallographic data obtained for a binary complex of 9-(5',5'-difluoro-5'-phosphonopentyl)guanine (DFPP-G) with calf spleen PNP. DFPP-DG and its analogous compounds were adjusted by length of the linker achieved by the Sonogashira-coupling reaction between a 9-deaza-9-iodoguanine derivative and omega-alkynyldifluoromethylene phosphonates as a key reaction. DFPP-DG is a very potent PNP inhibitor with apparent inhibition constants (in the presence of 1 mM phosphate) of 4.4 and 8.1 nM versus calf spleen and human erythrocyte PNPs, respectively. One of its analogues, homo-DFPP-DG, with longer chain linking phosphonate and 9-deazaguanine is even more potent versus human enzyme, with an apparent inhibition constant of 5.3 nM (in the presence of 1mM phosphate).
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Affiliation(s)
- Sadao Hikishima
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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17
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Sakata A, Yasuda K, Ochiai T, Shimeno H, Hikishima S, Yokomatsu T, Shibuya S, Soeda S. Inhibition of lipopolysaccharide-induced release of interleukin-8 from intestinal epithelial cells by SMA, a novel inhibitor of sphingomyelinase and its therapeutic effect on dextran sulphate sodium-induced colitis in mice. Cell Immunol 2007; 245:24-31. [PMID: 17466962 DOI: 10.1016/j.cellimm.2007.03.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [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: 01/29/2007] [Revised: 03/16/2007] [Accepted: 03/19/2007] [Indexed: 01/28/2023]
Abstract
Lipopolysaccharide (LPS) and inflammatory cytokines cause activation of sphingomyelinases (SMases) and subsequent hydrolysis of sphingomyelin (SM) to produce a lipid messenger ceramide. The use of SMase inhibitors may offer new therapies for the treatment of the LPS- and cytokines-related inflammatory bowel disease (IBD). We synthesized a series of difluoromethylene analogues of SM (SMAs). Here, we show that LPS efficiently increases the release of IL-8 from HT-29 intestinal epithelial cells by activating both neutral SMase and nuclear factor (NF)-kappaB in the cells. The addition of SMA-7 suppressed neutral SMase-catalyzed ceramide production, NF-kappaB activation, and IL-8 release from HT-29 cells caused by LPS. The results suggest that activation of neutral SMase is an underlying mechanism of LPS-induced release of IL-8 from the intestinal epithelial cells. Ceramide production following LPS-induced SM hydrolysis may trigger the activation of NF-kappaB in nuclei. Oral administration of SMA-7 (60 mg/kg) to mice with 2% dextran sulfate sodium (DSS) in their drinking water, for 21 consecutive days, reduced significantly the severity of colonic injury. This finding suggests a central role for SMase/ceramide signaling in the pathology of DSS-induced colitis in mice. The therapeutic effect of SMA-7 observed in mice may involve the suppression of IL-8 production from intestinal epithelial cells by LPS or other inflammatory cytokines.
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Affiliation(s)
- Akira Sakata
- Faculty of Pharmaceutical Sciences, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan
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Sakata A, Ochiai T, Shimeno H, Hikishima S, Yokomatsu T, Shibuya S, Toda A, Eyanagi R, Soeda S. Acid sphingomyelinase inhibition suppresses lipopolysaccharide-mediated release of inflammatory cytokines from macrophages and protects against disease pathology in dextran sulphate sodium-induced colitis in mice. Immunology 2007; 122:54-64. [PMID: 17451462 PMCID: PMC2265987 DOI: 10.1111/j.1365-2567.2007.02612.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Lipopolysaccharide (LPS) and inflammatory cytokines cause activation of sphingomyelinases (SMases) and subsequent hydrolysis of sphingomyelin (SM) to produce a lipid messenger ceramide. The design of SMase inhibitors may offer new therapies for the treatment of LPS- and cytokine-related inflammatory bowel disease. We synthesized a series of difluoromethylene analogues of SM (SMAs). We report here the effects of the most potent SMase inhibitor, SMA-7, on the LPS-mediated release of tumour necrosis factor-alpha, interleukin-1beta and interleukin-6 from THP-1 macrophages and the pathology of dextran sulphate sodium (DSS)-induced colitis in mice. SMA-7 suppressed the LPS-induced cytokine release and nuclear factor-kappaB activation. LPS stimulation caused a four-fold increase in acid SMase activation, but little increase in neutral SMase activity. The presence of 10 microm SMA-7 caused acid SMase to remain at the control levels and reduced the formation of ceramide. HT-29 cells had significantly decreased cell viability when incubated with media from LPS-stimulated THP-1 macrophages. However, incubating the colon cells in media from both SMA-7 and LPS-treated macrophages caused little decrease in viability, suggesting that ceramide has a role in the LPS-stimulated signalling that releases cytotoxic factors against colon cells. Oral administration of SMA-7 to mice with 2% DSS in the drinking water, for 10 or 21 consecutive days, reduced significantly the cytokine levels in the colon and the severity of colonic injury. These findings suggest a central role for acid SMase/ceramide signalling in the pathology of DSS-induced colitis in mice, indicating a possible preventive or therapeutic role for SMase inhibitor in inflammatory bowel disease.
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Affiliation(s)
- Akira Sakata
- Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan
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Hikishima S, Minakawa N, Kuramoto K, Ogata S, Matsuda A. Synthesis and characterization of oligodeoxynucleotides containing naphthyridine:imidazopyridopyrimidine base pairs at their sticky ends. Application as thermally stabilized decoy molecules. Chembiochem 2007; 7:1970-5. [PMID: 17031887 DOI: 10.1002/cbic.200600318] [Citation(s) in RCA: 21] [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] [Indexed: 12/23/2022]
Abstract
We describe the synthesis and properties of oligodeoxynucleotides (ODNs) containing 1,8-naphthyridine C-nucleoside (Na-NO) and imidazo[5',4':4,5]pyrido[2,3-d]pyrimidine nucleoside (Im-ON) at the termini. The modified ODNs were more resistant (6 to 40 times) than natural DNA to snake venom phosphodiesterase (SVPD). Although incorporation of one pair each of Na-NO:Im-ON on the sticky ends of the duplex was insufficient for thermal stabilization (+2.5 degrees C per pair relative to the G:C pair), the duplex containing two consecutive Na-NO:Im-ON pairs at its sticky ends was markedly stabilized thermally. The stabilizing effect of the incorporation of additional Na-NO:Im-ON pairs is estimated to be +7.8 degrees C per pair. Application as thermally stabilized decoy molecules to NF-kappaB (p50) was also demonstrated. The DNA duplexes containing the Na-NO:Im-ON pairs (ODN I:ODN II and ODN III:ODN IV) acted as competitors to the natural NF-kappaB-binding duplex (ODN V: ODN VI), and the calculated IC50 values of ODN I:ODN II and ODN III:ODN IV were 20.1+/-13.3 and 10.9+/-4.8 nM, respectively, greater than that of ODN V:ODN VI.
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Affiliation(s)
- Sadao Hikishima
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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Hikishima S, Minakawa N, Kuramoto K, Fujisawa Y, Ogawa M, Matsuda A. Synthesis of 1,8-naphthyridine C-nucleosides and their base-pairing properties in oligodeoxynucleotides: thermally stable naphthyridine:imidazopyridopyrimidine base-pairing motifs. Angew Chem Int Ed Engl 2006; 44:596-8. [PMID: 15612071 DOI: 10.1002/anie.200461857] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sadao Hikishima
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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Hikishima S, Isobe M, Koyanagi S, Soeda S, Shimeno H, Shibuya S, Yokomatsu T. Synthesis and biological evaluation of 9-(5′,5′-difluoro-5′-phosphonopentyl)guanine derivatives for PNP-inhibitors. Bioorg Med Chem 2006; 14:1660-70. [PMID: 16263289 DOI: 10.1016/j.bmc.2005.10.017] [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: 10/07/2005] [Accepted: 10/07/2005] [Indexed: 11/21/2022]
Abstract
9-(5',5'-Difluoro-5'-phosphonopentyl)guanine (DFPP-G) and its hypoxanthine analogue (DFPP-H) were modified by introducing a methyl group to all possible positions of the linker connecting a purine and difluoromethylenephosphonic acid moiety to evaluate the effects of the methyl group on inhibition against purine nucleoside phosphorylase. The methyl group on the linker affected the inhibition in a positional-dependent manner. Inhibitory potency of alpha-methyl and beta-methyl-substituted analogues of DFPP-H increased by about 600- to 1000-fold upon converting to cyclopropane nucleotide analogue (+/-)-4.
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Affiliation(s)
- Sadao Hikishima
- School of Pharmacy, Tokyo University of Pharmacy and Life Science, Japan
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Hikishima S, Minakawa N, Kuramoto K, Fujisawa Y, Ogawa M, Matsuda A. Synthesis of 1,8-Naphthyridine C-Nucleosides and Their Base-Pairing Properties in Oligodeoxynucleotides: Thermally Stable Naphthyridine:Imidazopyridopyrimidine Base-Pairing Motifs. Angew Chem Int Ed Engl 2005. [DOI: 10.1002/ange.200461857] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Hikishima S, Fujisawa Y, Ogawa M, Minakawa N, Matsuda A. Synthesis and properties of oligodeoxyribonucleotides containing the new base pairs, Im-N(O):Na-O(N) and Im-O(N):Na-N(O), with the ability to form four hydrogen bonds. ACTA ACUST UNITED AC 2003:35-6. [PMID: 14510367 DOI: 10.1093/nass/3.1.35] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Previously, we synthesized oligodeoxyribonucleotides (ODNs) containing novel base pairing motif consisting of tricyclic nucleosides, Im-N(O) and Im-O(N), with the ability to form four hydrogen bonds (H-bonds). When the base pair, Im-N(O):Im-O(N) pair, was incorporated into the duplex, thermal stability of the duplex depended on the sequence context. In this time, on the basis of previous results, we designed two new bicyclic nucleosides, Na-N(O) and Na-O(N) as complementary nucleobase of the tricyclic nucleobases. These nucleosides were synthesized via a Pd-mediated cross coupling reaction as a key step. When the new Im-O(N):Na-N(O) pair was incorporated into the duplex, it was remarkably stabilized independent of the sequence context.
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Affiliation(s)
- Sadao Hikishima
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan
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Minakawa N, Kojima N, Hikishima S, Sasaki T, Kiyosue A, Atsumi N, Ueno Y, Matsuda A. New base pairing motifs. The synthesis and thermal stability of oligodeoxynucleotides containing imidazopyridopyrimidine nucleosides with the ability to form four hydrogen bonds. J Am Chem Soc 2003; 125:9970-82. [PMID: 12914460 DOI: 10.1021/ja0347686] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.6] [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: 11/30/2022]
Abstract
The synthesis and thermal stability of oligodeoxynucleotides (ODNs) containing imidazo[5',4':4,5]pyrido[2,3-d]pyrimidine nucleosides 1-4 (N(N), O(O), N(O), and O(N), respectively) with the aim of developing two sets of new base pairing motifs consisting of four hydrogen bonds (H-bonds) is described. The proposed four tricyclic nucleosides 1-4 were synthesized through the Stille coupling reaction of a 5-iodoimidazole nucleoside with an appropriate 5-stannylpyrimidine derivative, followed by an intramolecular cyclization. These nucleosides were incorporated into ODNs to investigate the H-bonding ability. When one molecule of the tricyclic nucleosides was incorporated into the center of each ODN (ODN I and II, each 17mer), no apparent specificity of base pairing was observed, and all duplexes were less stable than the duplexes containing natural G:C and A:T pairs. On the other hand, when three molecules of the tricyclic nucleosides were consecutively incorporated into the center of each ODN (ODN III and IV, each 17mer), thermal and thermodynamic stabilization of the duplexes due to the specific base pairings was observed. The melting temperature (T(m)) of the duplex containing the N(O):O(N) pairs showed the highest T(m) of 84.0 degrees C, which was 18.2 and 23.5 degrees C higher than that of the duplexes containing G:C and A:T pairs, respectively. This result implies that N(O)and O(N) form base pairs with four H-bonds when they are incorporated into ODNs. The duplex containing N(O):O(N) pairs was markedly stabilized by the assistance of the stacking ability of the imidazopyridopyrimidine bases. Thus, we developed a thermally stable new base pairing motif, which should be useful for the stabilization and regulation of a variety of DNA structures.
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Affiliation(s)
- Noriaki Minakawa
- Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-12, Nishi-6, Kita-ku, Sapporo 060-0812, Japan.
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