51
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Miyazaki Y, Iwabuchi K, Iwata D, Miyazaki A, Kon Y, Niino M, Kikuchi S, Yanagawa Y, Kaer LV, Sasaki H, Onoé K. Effect of high fat diet on NKT cell function and NKT cell-mediated regulation of Th1 responses. Scand J Immunol 2008; 67:230-7. [PMID: 18226013 DOI: 10.1111/j.1365-3083.2007.02062.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Diet is one of the important factors that modulate immune responses. In the present study, we have examined the capacity of dietary lipids to modify immune responses in mice and we have investigated the contribution of glycolipid-reactive natural killer T (NKT) cells in this process. Mice fed, high fat diet (HFD; 21.2% fat, 0.20% cholesterol) for 3 weeks, as compared with mice fed standard fat diet (SFD; 4.3% fat, 0.03% cholesterol), showed significantly reduced interferon-gamma production in sera at 6 or 12 h after intraperitoneal injection of an NKT cell ligand, alpha-galactosylceramide. In contrast, production of interleukin-13 was significantly higher at 2 and 6 h in HFD fed mice compared with mice on SFD. No difference was detected in the serum interleukin-4 levels between these two groups of animals. The proportion of NKT cells in spleen and liver was reduced in mice fed HFD compared with those on SFD. In addition, activation of NKT cells assessed by up-regulation of CD69 was suppressed specifically in liver from mice fed HFD. Recall responses of conventional T cells and delayed-type hypersensitivity (Th1 type) against ovalbumin were significantly suppressed in mice fed HFD in comparison with those fed SFD. This suppression was not observed in CD1d-/- mice, suggesting that NKT cells in mice fed HFD played a role in suppressing Th1 responses. Taken together, our findings suggest a critical link between NKT cells, dietary lipid and adaptive immune responses.
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Affiliation(s)
- Y Miyazaki
- Division of Immunobiology, Research Section of Pathophysiology, Institute for Genetic Medicine, Hokkaido University, Japan
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52
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Yamada M, Kaku Y, Nakamura K, Yoshii M, Yamamoto Y, Miyazaki A, Tsunemitsu H, Narita M. Immunohistochemical Detection of Porcine Teschovirus Antigen in the Formalin-fixed Paraffin-embedded Specimens from Pigs Experimentally Infected with Porcine Teschovirus. ACTA ACUST UNITED AC 2007; 54:571-4. [DOI: 10.1111/j.1439-0442.2007.00974.x] [Citation(s) in RCA: 9] [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: 11/27/2022]
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53
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Shiotani K, Miyazaki A, Li T, Tsuda Y, Yokoi T, Ambo A, Sasaki Y, Bryant S, Jinsmaa Y, Lazarus L, Okada Y. Synthesis of Opioidmimetics, 3-[H-Dmt-NH(CH2)m]-6-[H-Dmt-NH(CH2)n]-2(1H)-pyrazinones, and Studies on Structure-Activity Relationships. Med Chem 2007; 3:583-98. [DOI: 10.2174/157340607782360272] [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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54
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Shiotani K, Li T, Miyazaki A, Tsuda Y, Yokoi T, Ambo A, Sasaki Y, Bryant SD, Lazarus LH, Okada Y. Design and synthesis of opioidmimetics containing 2',6'-dimethyl-L-tyrosine and a pyrazinone-ring platform. Bioorg Med Chem Lett 2007; 17:5768-71. [PMID: 17826995 PMCID: PMC2366109 DOI: 10.1016/j.bmcl.2007.08.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2007] [Revised: 08/16/2007] [Accepted: 08/24/2007] [Indexed: 11/28/2022]
Abstract
Twelve 2',6'-dimethyl-L-tyrosine (Dmt) analogues linked to a pyrazinone platform were synthesized as 3- or 6-[H-Dmt-NH(CH(2))(n)],3- or 6-R-2(1H)-pyrazinone (n=1-4). 3-[H-Dmt-NH-(CH(2))(4)]-6-beta-phenethyl-5-methyl-2(1H)-pyrazinone 11 bound to mu-opioid receptors with high affinity (K(i)mu=0.13 nM; K(i)delta/K(i)mu=447) with mu-agonism (GPI IC(50)=15.9 nM) and weak delta-antagonism (MVD pA(2)=6.35). Key factors affecting opioid affinity and functional bioactivity are the length of the aminoalkyl chain linked to Dmt and the nature of the R residue. These data present a simplified method for the formation of pyrazinone opioidmimetics and new lead compounds.
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Affiliation(s)
- Kimitaka Shiotani
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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55
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Li T, Shiotani K, Miyazaki A, Tsuda Y, Ambo A, Sasaki Y, Jinsmaa Y, Marczak E, Bryant SD, Lazarus LH, Okada Y. Bifunctional [2',6'-dimethyl-L-tyrosine1]endomorphin-2 analogues substituted at position 3 with alkylated phenylalanine derivatives yield potent mixed mu-agonist/delta-antagonist and dual mu-agonist/delta-agonist opioid ligands. J Med Chem 2007; 50:2753-66. [PMID: 17497839 PMCID: PMC2669435 DOI: 10.1021/jm061238m] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Endomorphin-2 (H-Tyr-Pro-Phe-Phe-NH2) and [Dmt1]EM-2 (Dmt = 2',6'-dimethyl-l-tyrosine) analogues, containing alkylated Phe3 derivatives, 2'-monomethyl (2, 2'), 3',5'- and 2',6'-dimethyl (3, 3', and 4', respectively), 2',4',6'-trimethyl (6, 6'), 2'-ethyl-6'-methyl (7, 7'), and 2'-isopropyl-6'-methyl (8, 8') groups or Dmt (5, 5'), had the following characteristics: (i) [Xaa3]EM-2 analogues exhibited improved mu- and delta-opioid receptor affinities. The latter, however, were inconsequential (Kidelta = 491-3451 nM). (ii) [Dmt1,Xaa3]EM-2 analogues enhanced mu- and delta-opioid receptor affinities (Kimu = 0.069-0.32 nM; Kidelta = 1.83-99.8 nM) without kappa-opioid receptor interaction. (iii) There were elevated mu-bioactivity (IC50 = 0.12-14.4 nM) and abolished delta-agonism (IC50 > 10 muM in 2', 3', 4', 5', 6'), although 4' and 6' demonstrated a potent mixed mu-agonism/delta-antagonism (for 4', IC50mu = 0.12 and pA2 = 8.15; for 6', IC50mu = 0.21 nM and pA2 = 9.05) and 7' was a dual mu-agonist/delta-agonist (IC50mu = 0.17 nM; IC50delta = 0.51 nM).
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MESH Headings
- Animals
- Binding, Competitive
- Brain/metabolism
- Guinea Pigs
- In Vitro Techniques
- Ligands
- Male
- Mice
- Muscle Contraction/drug effects
- Muscle, Smooth/drug effects
- Muscle, Smooth/innervation
- Muscle, Smooth/physiology
- Myenteric Plexus/physiology
- Neuromuscular Junction/drug effects
- Neuromuscular Junction/physiology
- Oligopeptides/chemical synthesis
- Oligopeptides/pharmacology
- Radioligand Assay
- Rats
- Rats, Sprague-Dawley
- Receptors, Opioid, delta/agonists
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, mu/agonists
- Structure-Activity Relationship
- Synaptosomes/metabolism
- Tyrosine/analogs & derivatives
- Tyrosine/chemical synthesis
- Tyrosine/pharmacology
- Vas Deferens/drug effects
- Vas Deferens/physiology
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Affiliation(s)
- Tingyou Li
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Kimitaka Shiotani
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Anna Miyazaki
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Yuko Tsuda
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Akihiro Ambo
- Department of Biochemistry, Tohoku Pharmaceutical University, Aoba-ku, Sendai 981-8558, Japan
| | - Yusuke Sasaki
- Department of Biochemistry, Tohoku Pharmaceutical University, Aoba-ku, Sendai 981-8558, Japan
| | - Yunden Jinsmaa
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, U.S.A
| | - Ewa Marczak
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, U.S.A
| | - Sharon D. Bryant
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, U.S.A
| | - Lawrence H. Lazarus
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, U.S.A
- Corresponding authors: Y. Okada: Tel: +81-78-974-1551, fax: +81-78-974-5689., E-mail: . L. H. Lazarus: Tel: +1-919-541-3238, fax: + 1-919-541-5737. E-mail:
| | - Yoshio Okada
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
- Corresponding authors: Y. Okada: Tel: +81-78-974-1551, fax: +81-78-974-5689., E-mail: . L. H. Lazarus: Tel: +1-919-541-3238, fax: + 1-919-541-5737. E-mail:
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56
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Miyazaki A, Yamazaki H, Aimatsu M, Enoki T, Watanabe R, Ogura E, Kuwatani Y, Iyoda M. Crystal Structure and Physical Properties of Conducting Molecular Antiferromagnets with a Halogen-Substituted Donor: (EDO-TTFBr2)2FeX4 (X = Cl, Br). Inorg Chem 2007; 46:3353-66. [PMID: 17367128 DOI: 10.1021/ic061871y] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [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
The crystal structure and physical properties of radical ion salts (EDO-TTFBr2)2FeX4 (X = Cl, Br) based on halogen-substituted organic donor and magnetic anions are investigated, including the comparison with the isomorphous compounds (EDO-TTFBr2)2GaX4 with nonmagnetic anions. The crystal structure of these four salts consists of uniformly stacked donor molecules and tetrahedral counter anions, and the Br substituents of the donor molecules are connected to halide ligands of anions with remarkably short intermolecular atomic distances. These salts show metallic behavior around room temperature and undergo a spin-density-wave transition in the low-temperature range, as confirmed with the divergence of the electron spin resonance (ESR) line width. Although close anion-anion contacts are absent in these salts, the FeCl4 salt undergoes an antiferromagnetic transition at TN = 4.2 K, and the FeBr4 salt shows successive magnetic transitions at TN = 13.5 K and TC2 = 8.5 K with a helical spin structure as a candidate for the ground state of the d-electron spins. The magnetoresistance of the FeCl4 salt shows stepwise anomalies, which are explained qualitatively using a pi-d interaction-based frustrated spin system model composed of the donor pi-electron and the anion d-electron spins. Although on the ESR spectra of the FeX4 salts signals from the pi- and d-electron spins are separately observed, the line width of the pi-electron spins broadens under the temperature where the susceptibility deviates from the Curie-Weiss behavior, showing the presence of the pi-d interaction.
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Affiliation(s)
- A Miyazaki
- Department of Chemistry, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan.
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57
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Cho A, Asano T, Yamamoto H, Nagata M, Takiguchi N, Kainuma O, Souda H, Gunji H, Miyazaki A, Nojima H, Ikeda A, Matsumoto I, Ryu M, Makino H, Okazumi S. Laparoscopy-assisted hepatic lobectomy using hilar Glissonean pedicle transection. Surg Endosc 2007; 21:1466-8. [PMID: 17356935 DOI: 10.1007/s00464-007-9253-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [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: 10/12/2006] [Accepted: 01/25/2007] [Indexed: 02/06/2023]
Abstract
Although many reports have described laparoscopic minor liver resections, major hepatic resection, including right or left lobectomy, has not been widely developed because of technical difficulties. This article describes a new technique for performing laparoscopy-assisted right or left hepatic lobectomy using hilar Glissonean pedicle transection. Laparoscopic mobilization of the right or left hepatic lobe is performed, including dissection of the round, faliciform, triangular, and coronary ligaments. The right or left Glissonean pedicle is encircled and divided laparoscopically. A parenchymal dissection is then performed though the upper median or right subcostal incision, through which the resected liver is removed. We successfully performed this procedure in 6 patients without blood transfusion or serious complications. Laparoscopy-assisted hepatic lobectomy using hilar Glissonean pedicle transection can be feasible and safe in highly selected patients.
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Affiliation(s)
- A Cho
- Department of Gastroenterological Surgery, Chiba Cancer Center Hospital, 666-2 Nitonachou, Chuouku, Chiba, 260-8717, Japan.
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58
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Li T, Jinsmaa Y, Nedachi M, Miyazaki A, Tsuda Y, Ambo A, Sasaki Y, Bryant SD, Marczak E, Li Q, Swartzwelder HS, Lazarus LH, Okada Y. Transformation of μ-opioid receptor agonists into biologically potent μ-opioid receptor antagonists. Bioorg Med Chem 2007; 15:1237-51. [PMID: 17142049 DOI: 10.1016/j.bmc.2006.11.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2006] [Revised: 11/09/2006] [Accepted: 11/10/2006] [Indexed: 11/24/2022]
Abstract
N-Allylation (-CH(2)-CHCH(2)) of [Dmt(1)]endomorphins yielded the following: (i) [N-allyl-Dmt(1)]endomorphin-2 (Dmt=2',6'-dimethyl-l-tyrosine) (12) and [N-allyl-Dmt(1)]endomorphin-1 (15) (K(i)mu=0.45 and 0.26nM, respectively) became mu-antagonists (pA(2)=8.59 and 8.18, respectively) with weak delta-antagonism (pA(2)=6.32 and 7.32, respectively); (ii) intracerebroventricularly administered 12 inhibited morphine-induced CNS-mediated antinociception in mice [AD(50) (0.148ng/mouse) was 16-fold more potent than naloxone], but not spinal antinociception, and (iii) 15 reversed the alcohol-elevated frequency in spontaneous inhibitory post-synaptic currents (IPSC) in hippocampal CA1 pyramidal cells in rat brain slices (P=0.0055). Similarly, N-allylation of the potent mu-opioidmimetic agonists, 1,6-bis-[H-Dmt-NH]-hexane and 3,6-bis-[Dmt-NH-propyl]-2(1H)-pyrazinone, converted them into mu-antagonists (pA(2)=7.23 and 7.17 for the N-allyl-derivatives 17 and 19, respectively), and exhibited weak delta-antagonism. Thus, N-allylation of Dmt containing opioid peptides or opioidmimetics continues to provide a facile means to convert selective mu-opioid agonists into potent mu-opioid antagonists.
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Affiliation(s)
- Tingyou Li
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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59
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Shiotani K, Li T, Miyazaki A, Tsuda Y, Bryant SD, Ambo A, Sasaki Y, Lazarus LH, Okada Y. Synthesis of 3,6-bis[H-Tyr/H-Dmt-NH(CH2)m,n]-2(1H)pyrazinone derivatives: function of alkyl chain length on opioid activity. Bioorg Med Chem Lett 2006; 16:5793-6. [PMID: 16949282 PMCID: PMC2636969 DOI: 10.1016/j.bmcl.2006.08.079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Revised: 07/22/2006] [Accepted: 08/17/2006] [Indexed: 10/24/2022]
Abstract
Dimeric opioid analogues linked to a pyrazinone platform, 3-[Tyr/Dmt-NH(CH2)m]-6-[Tyr/Dmt-NH(CH2)n]-2(1H)-pyrazinone (m, n=3 or 4), were synthesized. The Tyr-containing compound (m=4, n=3) exhibited mu-receptor affinity (K(i)mu; 7.58 nM) comparable to that of morphine, while the Dmt derivatives exhibited considerably higher affinity (K(i)mu; 0.021-0.051 nM) with corresponding agonism (IC50=1.79-4.93 nM). Interestingly one compound (m=4, n=3) revealed modest delta-opioid agonism; the converse analogue (m=3, n=4), however, was inactive in MVD assay.
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Affiliation(s)
- Kimitaka Shiotani
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Tingyou Li
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Anna Miyazaki
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Yuko Tsuda
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Sharon D. Bryant
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
| | - Akihiro Ambo
- Department of Biochemistry, Tohoku Pharmaceutical University, Aoba-ku, Sendai 981-8558, Japan
| | - Yusuke Sasaki
- Department of Biochemistry, Tohoku Pharmaceutical University, Aoba-ku, Sendai 981-8558, Japan
| | - Lawrence H. Lazarus
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709 U.S.A
| | - Yoshio Okada
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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60
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Enoki T, Enomoto M, Enomoto M, Yamaguchi K, Yoneyama N, Yamaura J, Miyazaki A, Saito G. Molecular Magnets Based on Charge Transfer Complexes. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259608030773] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- T. Enoki
- a Department of Chemistry , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152 , Japan
| | - M. Enomoto
- a Department of Chemistry , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152 , Japan
| | - M. Enomoto
- a Department of Chemistry , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152 , Japan
| | - K. Yamaguchi
- a Department of Chemistry , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152 , Japan
| | - N. Yoneyama
- a Department of Chemistry , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152 , Japan
| | - J. Yamaura
- a Department of Chemistry , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152 , Japan
| | - A. Miyazaki
- a Department of Chemistry , Tokyo Institute of Technology , Ookayama, Meguro-ku, Tokyo , 152 , Japan
| | - G. Saito
- b Department of Chemistry , Kyoto Univerisity , Sakyo-ku, Kyoto , 606 , Japan
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61
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Jinsmaa Y, Marczak E, Fujita Y, Shiotani K, Miyazaki A, Li T, Tsuda Y, Ambo A, Sasaki Y, Bryant SD, Okada Y, Lazarus LH. Potent in vivo antinociception and opioid receptor preference of the novel analogue [Dmt1]endomorphin-1. Pharmacol Biochem Behav 2006; 84:252-8. [PMID: 16782179 DOI: 10.1016/j.pbb.2006.05.005] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2006] [Revised: 05/09/2006] [Accepted: 05/11/2006] [Indexed: 10/24/2022]
Abstract
[Dmt1]Endomorphin-1 is a novel analogue of the potent mu-opioid agonist endomorphin-1. Given the physiological role of endomorphin-1 in vivo, this compound was investigated to determine if the antinociception occurred through systemic, supraspinal or in a combination of both neuronal pathways. This compound exhibited a potent dose-dependent effect intracerebroventricularly in both spinal and supraspinal regions, and was blocked by opioid antagonist naloxone, which verified the involvement of opioid receptors. Specific opioid antagonists characterized the apparent receptor type: beta-funaltrexamine (mu1/mu2-irreversible antagonist) equally inhibited spinal- and central-mediated antinociception; on the other hand, naloxonazine (mu1-subtype) was ineffective in both neural pathways and naltrindole (delta-selective antagonist) partially (26%), though not significantly, blocked only the spinal-mediated antinociception. Therefore, spinal antinociception was primarily triggered by mu2-subtypes without involvement of mu1-opioid receptors; however, although a slight enhancement of antinociception by delta-receptors cannot be completely ruled out since functional bioactivity indicated mixed mu-agonism/delta-antagonism. In terms of the CNS action, [Dmt1]endomorphin-1 appears to act through mu2-opioid receptor subtypes.
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Affiliation(s)
- Yunden Jinsmaa
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA.
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62
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Tashiro J, Kotani K, Yamazaki K, Nakamura Y, Miyazaki A, Bujo H, Saito Y. Th-P15:127 Role of malondialdehyde-modified low-density lipoprotein in restenosis. ATHEROSCLEROSIS SUPP 2006. [DOI: 10.1016/s1567-5688(06)82087-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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63
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Li T, Fujita Y, Shiotani K, Miyazaki A, Tsuda Y, Ambo A, Sasaki Y, Jinsmaa Y, Marczak E, Bryant SD, Salvadori S, Lazarus LH, Okada Y. Potent Dmt-Tic Pharmacophoric δ- and μ-Opioid Receptor Antagonists. J Med Chem 2005; 48:8035-44. [PMID: 16335927 DOI: 10.1021/jm050377l] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A series of dimeric Dmt-Tic (2',6'-dimethyl-L-tyrosyl-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid) analogues (8-14, 18-22) were covalently linked through diaminoalkane and symmetric or asymmetric 3,6-diaminoalkyl-2(1H)-pyrazinone moieties. All the compounds exhibited high affinity for both delta-opioid receptors [Ki(delta) = 0.06-1.53 nM] and mu-opioid receptors [Ki(mu) = 1.37-5.72 nM], resulting in moderate delta-receptor selectivity [Ki(mu)/Ki(delta) = 3-46]. Regardless of the type of linker between the Dmt-Tic pharmacophores, delta-opioid-mediated antagonism was extraordinarily high in all analogues (pA2 = 10.42-11.28), while in vitro agonism (MVD and GPI bioassays) was essentially absent (ca. 3 to >10 microM). While an unmodified N-terminus (9, 13, 18) revealed weak mu-opioid antagonism (pA2 = 6.78-6.99), N,N'-dimethylation (21, 22), which negatively impacts on mu-opioid-associated agonism (Balboni et al., Bioorg. Med. Chem. 2003, 11, 5435-5441), markedly enhanced mu-opioid antagonism (pA2 = 8.34 and 7.71 for 21 and 22, respectively) without affecting delta-opioid activity. These data are the first evidence that a single dimeric opioid ligand containing the Dmt-Tic pharmacophore exhibits highly potent delta- and mu-opioid antagonist activities.
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MESH Headings
- Animals
- Binding, Competitive
- Brain/metabolism
- Diamines/chemical synthesis
- Diamines/chemistry
- Diamines/pharmacology
- Dipeptides/chemical synthesis
- Dipeptides/chemistry
- Dipeptides/pharmacology
- Guinea Pigs
- Ileum/drug effects
- Ileum/physiology
- In Vitro Techniques
- Ligands
- Male
- Mice
- Muscle, Smooth/drug effects
- Muscle, Smooth/physiology
- Peptides/chemical synthesis
- Peptides/chemistry
- Peptides/pharmacology
- Pyrazines/chemical synthesis
- Pyrazines/chemistry
- Pyrazines/pharmacology
- Radioligand Assay
- Rats
- Rats, Sprague-Dawley
- Receptors, Opioid, delta/agonists
- Receptors, Opioid, delta/antagonists & inhibitors
- Receptors, Opioid, mu/agonists
- Receptors, Opioid, mu/antagonists & inhibitors
- Structure-Activity Relationship
- Tetrahydroisoquinolines/chemical synthesis
- Tetrahydroisoquinolines/chemistry
- Tetrahydroisoquinolines/pharmacology
- Vas Deferens/drug effects
- Vas Deferens/physiology
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Affiliation(s)
- Tingyou Li
- The Graduate School of Food and Medicinal Sciences and Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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64
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Li T, Shiotani K, Miyazaki A, Fujita Y, Tsuda Y, Ambo A, Sasaki Y, Jinsmaa Y, Marczak E, Bryant SD, Lazarus LH, Okada Y. New series of potent delta-opioid antagonists containing the H-Dmt-Tic-NH-hexyl-NH-R motif. Bioorg Med Chem Lett 2005; 15:5517-20. [PMID: 16183273 DOI: 10.1016/j.bmcl.2005.08.073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2005] [Revised: 08/20/2005] [Accepted: 08/26/2005] [Indexed: 11/20/2022]
Abstract
Heterodimeric compounds H-Dmt-Tic-NH-hexyl-NH-R (R=Dmt, Tic, and Phe) exhibited high affinity to delta- (K(i)delta=0.13-0.89nM) and mu-opioid receptors (K(i)mu=0.38-2.81nM) with extraordinary potent delta antagonism (pA(2)=10.2-10.4). These compounds represent the prototype for a new class of structural homologues lacking mu-opioid receptor-associated agonism (IC(50)=1.6-5.8muM) based on the framework of bis-[H-Dmt-NH]-alkyl (Okada, Y.; Tsuda, Y.; Fujita, Y.; Yokoi, T.; Sasaki, Y.; Ambo, A.; Konishi, R.; Nagata, M.; Salvadori, S.; Jinsmaa, Y.; Bryant, S. D.; Lazarus, L. H. J. Med. Chem.2003, 46, 3201), which exhibited both high mu affinity and bioactivity.
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Affiliation(s)
- Tingyou Li
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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65
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Miyazaki A, Fujisawa Y, Shiotani K, Fujita Y, Li T, Tsuda Y, Yokoi T, Bryant SD, Lazarus LH, Okada Y. Studies on the mechanism of 1,2-dihydropyrazin-2-one ring formation from dipeptidyl chloromethyl ketone and its chemical properties: immediate deamination during catalytic hydrogenation. Chem Pharm Bull (Tokyo) 2005; 53:1152-8. [PMID: 16141586 DOI: 10.1248/cpb.53.1152] [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: 11/22/2022]
Abstract
1,2-Dihydropyrazin-2-one derivatives, which have two aminoalkyl groups at the positions 3 and 6, were found to be efficient tools for the construction of potent, selective and long-acting opioid mimetics. During the course of preparation, we found that the catalytic hydrogenation of 3,6-bis(benzyloxycarbonylaminomethyl)-5-methyl-1,2-dihydropyrazin-2-one to remove the benzyloxycarbonyl groups resulted in a side reaction. By MS and NMR studies and by preparation of additional 1,2-dihydropyrazin-2-one derivatives, the structure of the by-product was identified as 3-aminomethyl-5,6-dimethyl-1,2-dihydropyrazin-2-one. Preparation of additional compounds substituted with deuterium provided us with sufficient information to confirm the structure of the product and to support a cyclization mechanism in its formation.
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Affiliation(s)
- Anna Miyazaki
- Faculty of Pharmaceutical Sciences, Kobe Gakuin University; Nishi-ku, Kobe 651-2180, Japan
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66
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Ohmori M, Baba R, Miyazaki A, Sato H, Katano S, Sawaki A, Tanabe S, Masatuki N, Yasukawa T, Hasegawa A, Imade S, Sano A. P19 A study for the effect of tongue cleaning. Oral Dis 2005. [DOI: 10.1111/j.1601-0825.2005.01105_42.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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67
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Igarashi K, Murabayashi Y, Hotta K, Kitamura Y, Kasuya F, Shiotani K, Tingyou L, Miyazaki A, Tsuda Y, Okada Y, Fukushima S. Application of liquid chromatography-tandem mass spectrometry for the determination of opioidmimetics in the brain dialysates from rats treated with opioidmimetics intraperitoneally. J Chromatogr B Analyt Technol Biomed Life Sci 2005; 806:53-7. [PMID: 15149611 DOI: 10.1016/j.jchromb.2004.02.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
We have determined three opioidmimetics (compounds I-III) in the rat brain dialysates after intraperitoneal (i.p.) administration of compounds I-III using a liquid chromatography/mass spectrometry with tandem mass spectrometry (LC-MS/MS). The dialysate samples with methanol were directly analyzed by online column-switching liquid chromatography. Using multiple reaction monitoring (MRM, product ions m/z 421 of m/z 657 for compound I, m/z 421 of m/z 643 for compound II, and m/z 407 of m/z 629 for compound III) on LC-MS/MS with electrospray ionization (ESI), opioidmimetics in rat brain dialysates were determined. Calibration curves of the method showed a good linearity in the range of 10-100 ng/ml for each compound. The limit of determination was estimated to be ca. 1 ng/ml for compounds II and III, and ca. 5 ng/ml for compound I, respectively. The precision of analysis showed coefficients of variation ranging from 4.7 to 10.4% at compound III concentration (10-100 ng/ml) in Ringer's solution. As a result, the procedure proved to be very suitable for routine analysis. The method was applied to the analysis of three opioidmimetics in the brain dialysate samples from rats treated with these compounds.
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Affiliation(s)
- Kazuo Igarashi
- Department of Analytical Toxicology, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Ikawadani-cho, Nishi-ku, Kobe 651-2180, Japan.
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68
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Fujita Y, Tsuda Y, Motoyama T, Li T, Miyazaki A, Yokoi T, Sasaki Y, Ambo A, Niizuma H, Jinsmaa Y, Bryant SD, Lazarus LH, Okada Y. Studies on the structure–activity relationship of 2′,6′-dimethyl-l-tyrosine (Dmt) derivatives: bioactivity profile of H–Dmt–NH–CH3. Bioorg Med Chem Lett 2005; 15:599-602. [PMID: 15664820 DOI: 10.1016/j.bmcl.2004.11.040] [Citation(s) in RCA: 8] [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] [Received: 10/11/2004] [Revised: 11/16/2004] [Accepted: 11/17/2004] [Indexed: 10/26/2022]
Abstract
The 2',6'-dimethyl-l-tyrosine (Dmt) enhances receptor affinity, functional bioactivity and in vivo analgesia of opioid peptides. To further investigate its direct influence on these opioid parameters, we developed a series of compounds (H-Dmt-NH-X). Among them, H-Dmt-NH-CH(3) showed the highest affinity (K(i)mu=7.45 nM) equal to that of morphine, partial mu-opioid agonism (E(max)=66.6%) in vitro and a moderate antinociception in mice.
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Affiliation(s)
- Yoshio Fujita
- The Graduate School of Food and Medicinal Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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69
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Jinsmaa Y, Fujita Y, Shiotani K, Miyazaki A, Li T, Tsuda Y, Okada Y, Ambo A, Sasaki Y, Bryant SD, Lazarus LH. Differentiation of opioid receptor preference by [Dmt1]endomorphin-2-mediated antinociception in the mouse. Eur J Pharmacol 2005; 509:37-42. [PMID: 15713427 DOI: 10.1016/j.ejphar.2004.12.015] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2004] [Revised: 12/07/2004] [Accepted: 12/09/2004] [Indexed: 10/25/2022]
Abstract
The potent opioid [Dmt1]endomorphin-2 (Dmt-Pro-Phe-Phe-NH2) differentiated between the opioid receptor subtypes responsible for the antinociception elicited by endomorphin-2 in mice. Antinociception, induced by the intracerebroventricular administration of [Dmt1]endomorphin-2 and inhibited by various opioid receptor antagonists [naloxone, naltrindole, beta-funaltrexamine, naloxonazine], was determined by the tail-flick (spinal effect) and hot-plate (supraspinal effect) tests. The opioid receptor subtypes involved in [Dmt1]endomorphin-2-induced antinociception differed between these in vivo model paradigms: naloxone (non-specific opioid receptor antagonist) and beta-funaltrexamine (irreversible mu1/mu2-opioid receptor antagonist) blocked antinociception in both tests, although stronger inhibition occurred in the hot-plate than the tail-flick test suggesting involvement of other opioid receptors. Consequently, we applied naloxonazine (mu1-opioid receptor antagonist) that significantly blocked the effect in the hot-plate test and naltrindole (delta-opioid receptor antagonist), which was only effective in the tail-flick test. The data indicated that [Dmt1]endomorphin-2-induced spinal antinociception was primarily mediated by both mu2- and delta-opioid receptors, while a supraspinal mechanism involved only mu1/mu2-subtypes.
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MESH Headings
- Analgesia
- Animals
- Dose-Response Relationship, Drug
- Drug Evaluation, Preclinical/methods
- Hot Temperature/adverse effects
- Injections, Intraventricular
- Injections, Subcutaneous
- Male
- Mice
- Naloxone/administration & dosage
- Naloxone/analogs & derivatives
- Naloxone/antagonists & inhibitors
- Naloxone/pharmacokinetics
- Naltrexone/administration & dosage
- Naltrexone/analogs & derivatives
- Naltrexone/antagonists & inhibitors
- Naltrexone/pharmacokinetics
- Nociceptors/drug effects
- Oligopeptides/antagonists & inhibitors
- Oligopeptides/chemical synthesis
- Oligopeptides/pharmacology
- Pain
- Pain Measurement/drug effects
- Pain Measurement/methods
- Receptors, Opioid, delta/chemistry
- Receptors, Opioid, delta/drug effects
- Receptors, Opioid, delta/physiology
- Receptors, Opioid, mu/drug effects
- Receptors, Opioid, mu/physiology
- Tail
- Time Factors
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Affiliation(s)
- Yunden Jinsmaa
- Medicinal Chemistry Group, Laboratory of Pharmacology and Chemistry, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA.
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70
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Li T, Fujita Y, Tsuda Y, Miyazaki A, Ambo A, Sasaki Y, Jinsmaa Y, Bryant SD, Lazarus LH, Okada Y. Development of Potent μ-Opioid Receptor Ligands Using Unique Tyrosine Analogues of Endomorphin-2. J Med Chem 2005; 48:586-92. [PMID: 15658871 DOI: 10.1021/jm049384k] [Citation(s) in RCA: 43] [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: 11/28/2022]
Abstract
Six analogues of tyrosine, which contained alkyl groups at positions 2', 3', and 6', either singly or in combination on the tyramine ring, were investigated for their effect on the opioid activity of [Xaa(1)]endomorphin-2 (EM-2). The opioid analogues displayed the following characteristics: (i) high mu-opioid receptor affinity [K(i)(mu) = 0.063-2.29 nM] with selectivity [K(i)(delta)/K(i)(mu)] ranging from 46 to 5347; (ii) potent functional mu-opioid agonism [GPI assay (IC(50) = 0.623-0.924 nM)] and with a correlation between delta-opioid receptor affinities and functional bioactivity using MVD; (iii) intracerebroventricular administration of [Dmt(1)]- (14) and [Det(1)]EM-2 (10) produced a dose-response antinociception in mice, with the former analogue more active than the latter; and (iv) a marked shift occurred from the trans-orientation at the Tyr(1)-Pro(2) bond to a cis-conformer compared to that observed previously with [Dmt(1)]EM-2 (14) (Okada et al. Bioorg. Med. Chem. 2003, 11, 1983-1984) except [Mmt(1)]EM-2 (7). The active profile of the [Xaa(1)]EM-2 analogues indicated that significant modifications on the tyramine ring are possible while high biological activity is maintained.
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MESH Headings
- Analgesics, Opioid/chemical synthesis
- Analgesics, Opioid/chemistry
- Analgesics, Opioid/pharmacology
- Animals
- Binding, Competitive
- Brain/metabolism
- Guinea Pigs
- Ileum/drug effects
- Ileum/innervation
- Ileum/physiology
- In Vitro Techniques
- Ligands
- Male
- Mice
- Muscle Contraction/drug effects
- Muscle, Smooth/drug effects
- Muscle, Smooth/innervation
- Muscle, Smooth/physiology
- Oligopeptides/chemical synthesis
- Oligopeptides/chemistry
- Oligopeptides/pharmacology
- Radioligand Assay
- Rats
- Rats, Sprague-Dawley
- Receptors, Opioid, mu/agonists
- Stereoisomerism
- Structure-Activity Relationship
- Tyrosine/analogs & derivatives
- Tyrosine/chemical synthesis
- Tyrosine/chemistry
- Tyrosine/pharmacology
- Vas Deferens/drug effects
- Vas Deferens/physiology
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Affiliation(s)
- Tingyou Li
- The Graduate School of Food and Medicinal Sciences, Faculty of Pharmaceutical Sciences, and High Technology Research Center, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan
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71
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Amano H, Miyazaki A, Iida K, Kawashima T, Iwaya M, Kamiyama S, Akasaki I, Liu R, Bell A, Ponce FA, Sahonta S, Cherns D. Defect and stress control of AlGaN for fabrication of high performance UV light emitters. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pssa.200405044] [Citation(s) in RCA: 18] [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] [Indexed: 11/10/2022]
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72
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Abstract
Primary ventricular tachycardia (VT) is rare in children. We report a child with VT exacerbated by fever which was ultimately fatal. His first episode occurred at 5 months old and recurred with fever, occasionally causing syncope. Episodes were difficult to control with antiarrhythmic agents during fever but remitted with antipyretics. He was admitted to hospital 23 times because of VT and died suddenly with fever when he was 17 years old. At autopsy, severe fatty replacement of the bundle of His and interstitial fibrosis of the sinus node was found.
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Affiliation(s)
- A Miyazaki
- Department of Pediatrics, National Cardiovascular Center, Suita, Osaka, Japan.
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73
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Fujiwara M, Tsukamoto Y, Miyazaki A, Moriyama M, Satoh H. Assignment of the murine ankyrin-repeated protein gene (Ankrd2) to mouse chromosome 19C3-->D1 and rat chromosome 1q51-->q53 by fluorescence in situ hybridization. Cytogenet Genome Res 2004; 105:159. [PMID: 15222314 DOI: 10.1159/000078023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- M Fujiwara
- Department of Cancer Biology, The Institute of Medical Science, The University of Tokyo, Japan
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74
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Miyazaki A, Kimura H, Maiwa K, Nakamura H, Kannan CV. Characterization of SHG candidate crystals in barium aluminum (gallium) borates. Cryst Res Technol 2004. [DOI: 10.1002/crat.200310191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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75
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Jinsmaa Y, Miyazaki A, Fujita Y, Li T, Fujisawa Y, Shiotani K, Tsuda Y, Yokoi T, Ambo A, Sasaki Y, Bryant SD, Lazarus LH, Okada Y. Oral Bioavailability of a New Class of μ-Opioid Receptor Agonists Containing 3,6-Bis[Dmt-NH(CH2)n]-2(1H)-pyrazinone with Central-Mediated Analgesia. J Med Chem 2004; 47:2599-610. [PMID: 15115401 DOI: 10.1021/jm0304616] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The inability of opioid peptides to be transported through epithelial membranes in the gastrointestinal tract and pass the blood-brain barrier limits their effectiveness for oral application in an antinociceptive treatment regime. To overcome this limitation, we enhanced the hydrophobicity while maintaining the aqueous solubility properties in a class of opioid-mimetic substances by inclusion of two identical N-termini consisting of Dmt (2',6'-dimethyl-l-tyrosine) coupled to a pyrazinone ring platform by means of alkyl chains to yield the class of 3,6-bis[Dmt-NH-(CH(2))(n)]-2(1H)-pyrazinones. These compounds displayed high micro-opioid receptor affinity (K(i)micro = 0.042-0.115 nM) and selectivity (K(i)delta/K(i)micro = 204-307) and functional micro-opioid receptor agonism (guinea-pig ileum, IC(50) = 1.3-1.9 nM) with little or undetectable bioactivity toward delta-opioid receptors (mouse vas deferens) and produced analgesia in mice in a naloxone reversible manner when administered centrally (intracerebroventricular, i.c.v.) or systemically (subcutaneously and orally). Furthermore, the most potent compound, 3,6-bis(3'-Dmt-aminopropyl)-5-methyl-2(1H)-pyrazinone (7'), lacked functional delta-opioid receptor bioactivity and was 50-63-fold and 18-21-fold more active than morphine by icv administration as measured analgesia using tail-flick (spinal involvement) and hot-plate (supraspinal effect) tests, respectively; the compound ranged from 16 to 63% as potent upon systemic injection. These analgesic effects are many times greater than unmodified opioid peptides. The data open new possibilities for the rational design of potential opioid-mimetic drugs that pass through the epithelium of the gastrointestinal tract and the blood-brain barrier to target brain receptors.
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Affiliation(s)
- Yunden Jinsmaa
- Medicinal Chemistry Group, LCBRA, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, USA
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76
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Kimura H, Miyazaki A, Maiwa K, Nakamura H. Fluctuation of crystallization at center part of floating molten zone under reduced gravity condition. Cryst Res Technol 2004. [DOI: 10.1002/crat.200310158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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77
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78
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Miyazaki A, Nakanishi T, Shimizu A, Hisamitsu H. First case of a single heterozygote of an abnormal hemoglobin, Hb Stanmore, [beta111(G13)Val-->Ala]. J Chromatogr B Analyt Technol Biomed Life Sci 2003; 792:23-31. [PMID: 12828994 DOI: 10.1016/s1570-0232(03)00275-7] [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: 11/28/2022]
Abstract
We describe a hemoglobin beta-chain mutant detected incidentally in an unusual profile of glycated hemoglobin (HbA1c) measured by ion-exchange HPLC. Analysis of intact globin by electrospray ionization mass spectrometry (ESI-MS) and peptide analysis by on-line HPLC-ESI-MS-MS revealed the substitution, [beta111(G13)Val-->Ala], which was confirmed by DNA analysis. This was the second case of Hb Stanmore. As the first case combined beta(0)-thalassemia, and the family study in that case showed no case of Hb Stanmore without combined thalassemia, the case presented here is the first case of single heterozygote, and the first Japanese case. Hb Stanmore is isoelectrophoretically silent with only mild clinical symptoms, although stability by isopropanol test was positive.
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Affiliation(s)
- A Miyazaki
- Department of Clinical Pathology, Osaka Medical College, 2-7 Daigakumachi, Takatsuki City, Osaka 569-8686, Japan
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79
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Hayashi T, Arockia J, Miyazaki A, Iguchi A. 4P-1047 A new HMG-CoA reductase inhibitor, pitavastatin retards remarkably the progression of high cholesterol induced atherosclerosis in rabbits—Relevance of nitric oxide and superoxide anion. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)91304-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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80
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Hayashi T, Arockia J, Miyazaki A, Iguchi A. 1P-0143 Celiprolol hydrochloride, β1 antagonist, β2 agonist, retards progression of vascular lesions and restore endothelial dysfunction in type II diabetic rats complicated with NO dysfunction. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90217-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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81
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Sakamoto Y, Sakai M, Tamagawa H, Wang G, Horiuchi S, Hagiwara T, Miyazaki A. 4P-0997 Interaction of oxidized low-density lipoprotein with thrombospondin-1 leads to inhibition of activation of transforming growth factor-β. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)91255-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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82
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Sakai M, Takaki K, Koito W, Unno Y, Araki Y, Sakamoto Y, Miyazaki A, Horiuchi S. 1P-0140 High glucose-enhanced expression of scavenger receptor class A is one mechanism for diabetes-induced atherosclerosis. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90214-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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83
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Tashiro J, Nakamura Y, Miyazaki A, Miyazaki O, Nakamura Y, Fukamachi I, Bujo H, Saito Y. 3P-0767 Relationship of plasma preβ1-HDL levels and atherosclerotic phases of coronary artery disease. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90985-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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84
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Furukawa K, Hori M, Sakamoto Y, Sakai M, Kihara S, Funahashi T, Matsuzawa Y, Miyazaki A, Horiuchi A, Nakayama H. 2HT01-2 Adiponectin, adipocyte-derived hormone suppresses acyl-coenzyme A: cholesterol acyltransferase (ACAT)-1 expression in human monocyte-derived macrophages. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90452-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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85
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Okazaki Y, Furuno M, Kasukawa T, Adachi J, Bono H, Kondo S, Nikaido I, Osato N, Saito R, Suzuki H, Yamanaka I, Kiyosawa H, Yagi K, Tomaru Y, Hasegawa Y, Nogami A, Schönbach C, Gojobori T, Baldarelli R, Hill DP, Bult C, Hume DA, Quackenbush J, Schriml LM, Kanapin A, Matsuda H, Batalov S, Beisel KW, Blake JA, Bradt D, Brusic V, Chothia C, Corbani LE, Cousins S, Dalla E, Dragani TA, Fletcher CF, Forrest A, Frazer KS, Gaasterland T, Gariboldi M, Gissi C, Godzik A, Gough J, Grimmond S, Gustincich S, Hirokawa N, Jackson IJ, Jarvis ED, Kanai A, Kawaji H, Kawasawa Y, Kedzierski RM, King BL, Konagaya A, Kurochkin IV, Lee Y, Lenhard B, Lyons PA, Maglott DR, Maltais L, Marchionni L, McKenzie L, Miki H, Nagashima T, Numata K, Okido T, Pavan WJ, Pertea G, Pesole G, Petrovsky N, Pillai R, Pontius JU, Qi D, Ramachandran S, Ravasi T, Reed JC, Reed DJ, Reid J, Ring BZ, Ringwald M, Sandelin A, Schneider C, Semple CAM, Setou M, Shimada K, Sultana R, Takenaka Y, Taylor MS, Teasdale RD, Tomita M, Verardo R, Wagner L, Wahlestedt C, Wang Y, Watanabe Y, Wells C, Wilming LG, Wynshaw-Boris A, Yanagisawa M, Yang I, Yang L, Yuan Z, Zavolan M, Zhu Y, Zimmer A, Carninci P, Hayatsu N, Hirozane-Kishikawa T, Konno H, Nakamura M, Sakazume N, Sato K, Shiraki T, Waki K, Kawai J, Aizawa K, Arakawa T, Fukuda S, Hara A, Hashizume W, Imotani K, Ishii Y, Itoh M, Kagawa I, Miyazaki A, Sakai K, Sasaki D, Shibata K, Shinagawa A, Yasunishi A, Yoshino M, Waterston R, Lander ES, Rogers J, Birney E, Hayashizaki Y. Analysis of the mouse transcriptome based on functional annotation of 60,770 full-length cDNAs. Nature 2002; 420:563-73. [PMID: 12466851 DOI: 10.1038/nature01266] [Citation(s) in RCA: 1226] [Impact Index Per Article: 55.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2002] [Accepted: 10/28/2002] [Indexed: 01/10/2023]
Abstract
Only a small proportion of the mouse genome is transcribed into mature messenger RNA transcripts. There is an international collaborative effort to identify all full-length mRNA transcripts from the mouse, and to ensure that each is represented in a physical collection of clones. Here we report the manual annotation of 60,770 full-length mouse complementary DNA sequences. These are clustered into 33,409 'transcriptional units', contributing 90.1% of a newly established mouse transcriptome database. Of these transcriptional units, 4,258 are new protein-coding and 11,665 are new non-coding messages, indicating that non-coding RNA is a major component of the transcriptome. 41% of all transcriptional units showed evidence of alternative splicing. In protein-coding transcripts, 79% of splice variations altered the protein product. Whole-transcriptome analyses resulted in the identification of 2,431 sense-antisense pairs. The present work, completely supported by physical clones, provides the most comprehensive survey of a mammalian transcriptome so far, and is a valuable resource for functional genomics.
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MESH Headings
- Alternative Splicing/genetics
- Amino Acid Motifs
- Animals
- Chromosomes, Mammalian/genetics
- Cloning, Molecular
- DNA, Complementary/genetics
- Databases, Genetic
- Expressed Sequence Tags
- Genes/genetics
- Genomics/methods
- Humans
- Membrane Proteins/genetics
- Mice/genetics
- Physical Chromosome Mapping
- Protein Structure, Tertiary
- Proteome/chemistry
- Proteome/genetics
- RNA, Antisense/genetics
- RNA, Messenger/analysis
- RNA, Messenger/genetics
- RNA, Untranslated/analysis
- RNA, Untranslated/genetics
- Transcription Initiation Site
- Transcription, Genetic/genetics
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Affiliation(s)
- Y Okazaki
- [1] Laboratory for Genome Exploration Research Group, RIKEN Genomic Sciences Center, RIKEN Yokohama Institute 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama, Kanagawa, 230-0045, Japan
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86
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Okada Y, Fujisawa Y, Morishita A, Shiotani K, Miyazaki A, Fujita Y, Li T, Tsuda Y, Yokoi T, Bryant SD, Lazarus LH. Immediate deamination from the aminomethyl group attached to 1,2-dihydropyrazin-2-one derivative during catalytic hydrogenation. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)01944-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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87
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Kamiyama S, Iwaya M, Takanami S, Terao S, Miyazaki A, Amano H, Akasaki I. UV Light-Emitting Diode Fabricated on Hetero-ELO-Grown Al0.22Ga0.78N with Low Dislocation Density. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/1521-396x(200208)192:2<296::aid-pssa296>3.0.co;2-z] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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88
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Abstract
The patient was a 47-year-old woman who underwent total hysterectomy for uterine leiomyoma in 1994. Two years later, intracaval and intravenous tumors were found by ultrasonic cardiography, magnetic resonance imaging, enhanced chest computed tomography, and venography. The patient underwent total removal of these tumors. Pathological findings indicated that these tumors were leiomyomas. After comparing the present findings with those of similar cases in the literature, we concluded that our patient had intravenous leiomyomatosis extending into the heart.
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Affiliation(s)
- Y Itani
- Third Department of Internal Medicine, Chiba University School of Medicine, Japan.
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89
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Rajendran RB, Tao H, Miyazaki A, Ramesh R, Ramachandran S. Determination of butyl-, phenyl-, octyl- and tributylmonomethyltin compounds in a marine environment (Bay of Bengal, India) using gas chromatography-inductively coupled plasma mass spectrometry. J Environ Monit 2001; 3:627-34. [PMID: 11785637 DOI: 10.1039/b106009k] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Organotin compounds (butyl-, phenyl-, octyl- and tributylmonomethyltin) and inorganic tin were quantified in sea-water and sediments from two harbours and several locations on the southeast coast of India using highly sensitive and selective gas chromatography-inductively coupled plasma mass spectrometry (GC-ICP-MS), adopting new extraction and analytical techniques with extremely low detection limits (water, 0.019-0.85 pg l(-1); sediment, 0.23-0.48 ng g(-1)). The concentrations of monobutyltin (MBT), dibutyltin (DBT) and tributyltin (TBT) in sea-water from Tuticorin harbour varied from 0.64 to 4.97, 3.0 to 26.8 and 0.3 to 30.4 ng Sn l(-1), respectively. MBT, DBT and TBT in sediments from harbour areas ranged from 1.6 to 393, 1.3 to 394 and ND (not detected) to 1280 ng Sn g(-1) (dry weight), respectively. Natural methylation in both harbours was established by quantifying tributylmonomethyltin (TBMMT) residues (sea-water, ND-0.19 ng Sn l(-1); sediment, ND-765 ng Sn g(-1) dry weight). In sea-water, octyltins were also determined as monooctyltin (MOT) > dioctyltin (DOT) > trioctyltin (TOT). Butyltin contamination in commercial harbours is evident, but other coastal waters are not contaminated with organotin residues. The high concentration of inorganic tin in estuarine sediment indicates an elevated rate of debutylation in the estuarine environment. Both methylation and debutylation of TBT in Chennai harbour were greater than in Tuticorin harbour. A significant correlation (r2 = 0.75) between total butyltin and organic carbon contents in sediment was found. To our knowledge, this is the first report on the distribution of butyltins and methylated butyltin in sea-water and sediment and octyltins in sea-water in the Indian marine environment.
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Affiliation(s)
- R B Rajendran
- National Institute of Advanced Industrial Science and Technology, Tsukuba Japan
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90
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Okuda K, Miyazaki A, Momose M, Murata M, Nomura T, Kubota T, Wolff LF, Yoshie H. Levels of tissue inhibitor of metalloproteinases-1 and matrix metalloproteinases-1 and -8 in gingival crevicular fluid following treatment with enamel matrix derivative (EMDOGAIN). J Periodontal Res 2001; 36:309-16. [PMID: 11585118 DOI: 10.1034/j.1600-0765.2001.360506.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [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: 11/23/2022]
Abstract
The mechanism of enamel matrix derivative (EM D) action on the periodontal wound healing process is not well understood. However, earlier in vitro studies from our laboratory demonstrated that EMD stimulated the proliferation of both periodontal ligament and gingival fibroblast cells. Therefore, the purpose of this study was to further evaluate the effect of EMD on the early wound healing process by assessing the protein levels of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) in gingival crevicular fluid (GCF). Sixteen patients, each of whom had one or two pairs of infrabony defects located contralaterally in the same arch, were included in this clinical trial. Thirty-six infrabony defects were randomly assigned treatment with flap surgery plus EMD or flap surgery plus placebo. At baseline and at 2, 4 and 12 week follow-up evaluation visits, GCF was sampled with paper strips. After determination of GCF volume, TIMP-1, MMP-1 and MMP-8 GCF levels were measured by an enzyme-linked immunosorbent assay. Intragroup analysis: At week 2 following surgery, when compared to baseline all parameters in each study group, except MMP-1, significantly increased (p<0.05). There were no significant differences between 4 or 12 weeks and baseline in either study group. Intergroup analysis: At 4 weeks after surgery, GCF volume and TIMP-1 levels showed a significant decrease (p<0.05) in the EMD group, when compared to the placebo group. MMP-1 levels at weeks 2, 4 and 12, and MMP-8 levels at weeks 4 and 12 were significantly lower (p < 0.05) in the EMD group compared to the placebo group. EMD compared to placebo treated sites demonstrated a more rapid return to baseline levels of TIMP-1, MMP-1 and MMP-8. These findings suggest that treatment with flap surgery and EMD, compared to flap surgery with placebo, accelerated healing at an earlier stage of wound healing following surgery.
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Affiliation(s)
- K Okuda
- Department of Periodontology, Faculty of Dentistry, Niigata University, Japan.
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91
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Kurahashi T, Miyazaki A, Suwan S, Isobe M. Extensive investigations on oxidized amino acid residues in H(2)O(2)-treated Cu,Zn-SOd protein with LC-ESI-Q-TOF-MS, MS/MS for the determination of the copper-binding site. J Am Chem Soc 2001; 123:9268-78. [PMID: 11562208 DOI: 10.1021/ja015953r] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The ESI (electrospray ionization)-Q-TOF (tandem quadrupole/orthogonal-acceleration time-of-flight) mass spectrometer combined with the nano-HPLC (high performance liquid chromatography) system was utilized to pinpoint the Cu-binding site in Cu,Zn-SOD (superoxide dismutase) protein. Cu,Zn-SOD was treated with hydrogen peroxide, intended to specifically oxidize histidine residues coordinated to the copper ion as a mass spectrometric probe. The oxidized Cu,Zn-SOD was then fragmented with the successive treatment of endoproteinase Asp-N and DTT (dithiothreitol). Separation of the peptide mixture with the nano-HPLC and the on-line ESI-Q-TOF MS analysis revealed that only two peptide fragments were oxidized to a significant extent. Further analyses of oxidized peptide fragments with LC-ESI-Q-TOF-MS/MS disclosed that three out of four Cu-coordinated histidine residues were specifically oxidized by action of a redox-active copper ion and hydrogen peroxide, demonstrating the copper-catalyzed oxidation of amino acid ligands could be a versatile tool for the mass spectrometric determination of the copper-binding site. In addition, proline and valine residues in the proximity of the Cu ion were found to be oxidized upon H(2)O(2) treatment.
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Affiliation(s)
- T Kurahashi
- Laboratory of Organic Chemistry, Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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92
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Ishikawa S, Komiyama Y, Kobayashi H, Tsuyuzaki J, Tokunaga S, Miyazaki A, Hanyu N, Ikeda S. Lupus anticoagulant in myasthenia gravis associated with IgM gammopathy. Intern Med 2001; 40:952-5. [PMID: 11579964 DOI: 10.2169/internalmedicine.40.952] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The plasma of a patient with myasthenia gravis had strong lupus anticoagulant activity and his IgM paraprotein displayed non-specific inhibition to coagulation factors IX, XI, XII, prekallikrein, and high molecular weight kininogen. He was placed on prednisolone, which resulted in improvement in his myasthenic symptoms, but the prolongation of APTT and macroglobulinemia remained. Double filtration plasmapheresis successfully decreased the serum IgM level from 1,190 mg/dl to 375 mg/dl and APTT improved from 58 s to 38 s. Myasthenia gravis is frequently associated with other autoimmune diseases, but the association with lupus anticoagulant and IgM gammopathy is rare.
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Affiliation(s)
- S Ishikawa
- Department of Medicine, Shinshu University School of Medicine, Matsumoto
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93
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Onishi Y, Yajima Y, Hayashi C, Sato M, Aoki C, Takahashi N, Miyazaki A, Eda Y, Ohira S, Oikawa H. [A case of advanced hepatocellular carcinoma (Vp3) with right adrenal gland metastasis successfully treated with repeated arterial infusion chemotherapy using low dose CDDP and 5-FU through an implanted reservoir]. Nihon Shokakibyo Gakkai Zasshi 2001; 98:1089-94. [PMID: 11579495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- Y Onishi
- Department of Gastroenterology, Sendai City Hospital
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94
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Isobe Z, Utsugi T, Ohyama Y, Miyazaki A, Ito H, Okuno S, Uchiyama T, Ohno T, Arai M, Tomono S, Kurabayashi M. Recurrent pyogenic vertebral osteomyelitis associated with type 2 diabetes mellitus. J Int Med Res 2001; 29:445-50. [PMID: 11725834 DOI: 10.1177/147323000102900511] [Citation(s) in RCA: 4] [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: 11/15/2022] Open
Abstract
We report a case of recurrent pyogenic vertebral osteomyelitis associated with type 2 diabetes mellitus. A 51-year-old male was admitted to our hospital because of lumbago and general fatigue, with multiple ulcers on the soles of his feet. Staphylococcus aureus was isolated from peripheral blood and the foot ulcers, and 67Gallium scintigram showed abnormal isotope uptake, accumulated at the lower thoracic spine. Antibiotics were administered and the patient underwent intensive insulin therapy. Magnetic resonance imaging (MRI), performed after the levels of C-reactive protein decreased to 0.0 mg/dl, indicated old inflammatory changes at the Th8-Th9 spine and antibiotics were stopped. Unexpectedly, 8 days later the patient complained of lumbago with fever again, and MRI showed acute inflammatory changes at the same lesion site. This case report suggests that it is important for complementary antibiotic therapy to continue after signs of inflammation have disappeared in cases of pyogenic vertebral osteomyelitis.
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Affiliation(s)
- Z Isobe
- Second Department of Internal Medicine, Gunma University School of Medicine, Maebashi, Japan
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95
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Sato M, Yajima Y, Takahashi N, Aoki C, Miyazaki A, Eda Y, Ohira S, Naganuma H, Kato H, Sakai N. [A case of adenosquamous carcinoma of the liver containing squamous components demonstrating a character of adenocarcinoma with immunohistochemical stains]. Nihon Shokakibyo Gakkai Zasshi 2001; 98:964-9. [PMID: 11524858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Affiliation(s)
- M Sato
- Department of Gastroenterology, Sendai City Hospital
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96
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Moriyama M, Tsukamoto Y, Fujiwara M, Kondo G, Nakada C, Baba T, Ishiguro N, Miyazaki A, Nakamura K, Hori N, Sato K, Shomori K, Takeuchi K, Satoh H, Mori S, Ito H. Identification of a novel human ankyrin-repeated protein homologous to CARP. Biochem Biophys Res Commun 2001; 285:715-23. [PMID: 11453652 DOI: 10.1006/bbrc.2001.5216] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We cloned a novel ankyrin repeat protein, Arpp, by immunoscreening a cDNA library constructed from a human esophageal carcinoma cell line, TE1, with an antibody directed to a hypothetical protein encoded by antisense p53 mRNA. Arpp protein is composed of 333 amino acids and contains four ankyrin-like repeat motifs in the middle portion of the protein, a PEST-like sequence and a lysine-rich sequence similar to a nuclear localization signal in the N-terminal region, and a proline-rich region containing consensus phosphorylation sites in the C-terminal region. Protein sequence analysis revealed that Arpp is homologous (52.7% identity) to Carp which is shown to be involved in the regulation of the transcription of the cardiac ventricular myosin light chain 2 gene. Arpp mRNA was found to be expressed in normal skeletal and cardiac muscle. Interestingly, Arpp expression was detectable in bilateral ventricles, but undetectable in bilateral atria and large vessels, suggesting that Arpp may play a specific function in cardiac ventricles as well as skeletal muscles.
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Affiliation(s)
- M Moriyama
- Department of Molecular Biology, Tottori University, 86 Nishimachi, Yonago-city, Tottori 683-8503, Japan.
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97
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Iijima M, Osawa M, Iwata M, Miyazaki A, Tei H. Topographic mapping of P300 and frontal cognitive function in Parkinson's disease. Behav Neurol 2001; 12:143-8. [PMID: 11455051 DOI: 10.1155/2000/764795] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The purpose of this study was to evaluate the relationship between P300 that is one of the event-related potentials and frontal cognitive functions in Parkinson's disease (PD) without clinically apparent dementia. Subjects were 20 PD cases 48 to 79 years of age, all of whom were within normal limits on the Mini-Mental State examination, and 55 age-matched healthy adults. P300 was elicited with an auditory oddball paradigm and recorded at 15 sites on the scalp. Cognitive functioning of the frontal lobe was evaluated using the New Modified Wisconsin Card Sorting Test (WCST) and the Letter Pick-Out Test (LPOT) which reflects selective attention and semantic categorization. P300 latency was delayed in 30.0% of P300 demonstrated abnormal distribution in 20.0%. the WCST and the LPOT were abnormal in 15.0%, P300 latency significantly correlated with number of subcategories achieved on the WCST. P300 amplitude correlated with scores on the LPOT. These results suggest that cognitive dysfunction which linked partly to the frontal lobe might begin in PD even without clinically apparent dementia.
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Affiliation(s)
- M Iijima
- Department of Neurology, Neurological Institute, Tokyo Women's Medical University, Tokyo, Japan
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98
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Ohuchi H, Yasuda K, Hasegawa S, Miyazaki A, Takamuro M, Yamada O, Ono Y, Uemura H, Yagihara T, Echigo S. Influence of ventricular morphology on aerobic exercise capacity in patients after the Fontan operation. J Am Coll Cardiol 2001; 37:1967-74. [PMID: 11401140 DOI: 10.1016/s0735-1097(01)01266-9] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVES This study investigated the influences of ventricular morphology, hemodynamics and clinical findings on exercise capacity in patients after the Fontan operation. BACKGROUND Determinants of exercise capacity after the Fontan operation remain unclear. METHODS Peak oxygen uptake (PVo2) was determined in 105 patients by exercise test and compared to hemodynamics and clinical findings. Patients were divided into three groups based on ventricular morphology: those with a right ventricle (group RV), a biventricle (group BV) and a left ventricle (group LV). RESULTS Ten patients with atrioventricular valve regurgitation (AVVR) or hypoxia exhibited a low PVo2. After excluding these patients, although PVo2 did not correlate with hemodynamics, except ventricular ejection fraction (p < 0.02), it correlated with age at the Fontan operation and exercise test (p < 0.002). The PVo2 was higher in group LV (63+/-9%) than in groups RV (55+/-9%) and BV (55+/-12%) (p < 0.01), while an inverse correlation between PVo2 and age at operation was demonstrated only in group RV (p < 0.05). Groups RV or BV and age at exercise test were associated with a lower PVo2, whereas group LV was an independent predictor of a higher PVo2 (p < 0.01). During 4.2 years of follow-up, a decrease in peak heart rate was related to a decrease in PVo2 (p < 0.05). The PVo2 decreased in group RV (p < 0.01). CONCLUSIONS In addition to AVVR, hypoxia, and heart rate response, ventricular morphology is related to exercise capacity. Early Fontan operation may be beneficial in terms of exercise capacity, especially in the group RV patients.
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Affiliation(s)
- H Ohuchi
- Department of Pediatrics, National Cardiovascular Center, Osaka, Japan
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99
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Abstract
Acyl-coenzyme A:cholesterol acyltransferase (ACAT) is an intracellular enzyme that produces cholesteryl esters in various tissues. In mammals, two ACAT genes (ACAT1 and ACAT2) have been identified. Together, these two enzymes are involved in storing cholesteryl esters as lipid droplets, in macrophage foam-cell formation, in absorbing dietary cholesterol, and in supplying cholesteryl esters as part of the core lipid for lipoprotein synthesis and assembly. The key difference in tissue distribution of ACAT1 and ACAT2 between humans, mice and monkeys is that, in adult human liver (including hepatocytes and bile duct cells), the major enzyme is ACAT1, rather than ACAT2. There is compelling evidence implicating a role for ACAT1 in macrophage foam-cell formation, and for ACAT2 in intestinal cholesterol absorption. However, further studies at the biochemical and cell biological levels are needed in order to clarify the functional roles of ACAT1 and ACAT2 in the VLDL or chylomicron synthesis/assembly process.
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Affiliation(s)
- T Y Chang
- Department of Biochemistry, Dartmouth Medical School, Hanover, New Hampshire 03755, USA.
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100
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Shimura H, Suzuki H, Miyazaki A, Furuya F, Ohta K, Haraguchi K, Endo T, Onaya T. Transcriptional activation of the thyroglobulin promoter directing suicide gene expression by thyroid transcription factor-1 in thyroid cancer cells. Cancer Res 2001; 61:3640-6. [PMID: 11325833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Gene therapy with thyroglobulin (TG) promoter and a prodrug/suicide gene combination may prove useful as a treatment for thyroid carcinoma. However, most poorly differentiated and anaplastic thyroid carcinomas have lost the ability to express the TG gene expression accompanied by loss of transcription factors [thyroid transcription factor-1 (TTF-1), TTF-2, or Pax-8] interacting with the TG promoter. In anticipation of developing transcriptionally targeted gene therapy of TG-nonproducing thyroid carcinomas, we investigated the effect of TTF-1 gene transfer on TG promoter activity and the cytotoxic effect obtained by the TG promoter-driven HSV-TK gene along with ganciclovir in thyroid carcinoma and nonthyroidal cells. Using a chimeric construct containing the 5'-flanking region of the rat TG gene between -826 and +39 bp and the luciferase gene, TG promoter activity was detected in a normal rat thyroid cell line (FRTL-5), but not in a dedifferentiated line of thyroid cells (FRT) expressing Pax-8 but not TTF-1, TTF-2, or TG [TTF-1(-)/TTF-2(-)/Pax-8(+)/TG(-)], or in a human papillary thyroid carcinoma cell line [BHP15-3; TTF-1(-)/TTF-2(-)/Pax-8(-)/TG(-)], a human pulmonary cell line [H441; TTF-1(+)/TTF-2(-)/Pax-8(-)/TG(-)], or a dog kidney epithelial cell line [MDCK; TTF-1(-)/TTF-2(-)/Pax-8(+)/TG(-)]. Cotransfection of the TTF-1 expression vector stimulated TG promoter activity in FRT and BHP15-3 dedifferentiated thyroid cells, but not in H441 pulmonary cells. Only weak activation was observed in MDCK kidney cells. We then constructed recombinant adenovirus vectors, AdTTF-1 and ADTGTK: AdTTF-1 contained cytomegalovirus promoter and rat TTF-1 cDNA; AdTGTK carried the TG promoter-driven HSV-TK gene. Infection with AdTGTK and combined with GCV treatment induced a cytotoxic effect in FRTL-5 cells but not in dedifferentiated thyroid or nonthyroid cells. Cotransduction of AdTTF-1 and AdTGTK permitted 90% cytotoxicity for BHP15-3 and >95% cytotoxicity for FRT, as well as for BHP7-13 and BHP18-21v thyroid cancer cell lines [both/TTF1(-)/TTF-2(-)/Pax-8(+)/TG(-)]. In contrast, little cytotoxicity was seen for H441 and MDCK cell lines even with 300 microg/ml of ganciclovir. These results suggest that cotransduction of a TG promoter-controlled suicide gene and the TTF-1 gene by adenoviral vectors confers transcriptionally targeted gene-mediated cytotoxicity in poorly differentiated thyroid carcinoma cells unable to express the TG gene.
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Affiliation(s)
- H Shimura
- Third Department of Internal Medicine, Yamanashi Medical University, Yamanashi 409-3898, Japan
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