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Ujiie K, Tanaka C, Arai M, Hashimoto M, Yoshida Y, Kawano T, Tamura S. Proposal for structure revision of pinofuranoxin A through total syntheses of stereoisomers. J Nat Med 2024:10.1007/s11418-024-01810-5. [PMID: 38587582 DOI: 10.1007/s11418-024-01810-5] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 03/29/2024] [Indexed: 04/09/2024]
Abstract
The relative configuration of the epoxide functionality in pinofuranoxin A (1), α-alkylidene-β-hydroxy-γ-methyl-γ-butyrolactone with trans-epoxy side chain isolated by Evidente et al. in 2021, was revised by DFT-based spectral reinvestigations and stereo-controlled synthesis. The present investigation demonstrates the difficulty of the configurational elucidation of the stereogenic centers on the conformationally flexible acyclic side-chains. Sharpless's enantioselective epoxidations and dihydroxylations were quite effective in the reinvestigations of the configurations. As our syntheses made all diastereomers available, these would be quite effective in the next structure-biological activity relationship studies.
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Affiliation(s)
- Kazuki Ujiie
- Laboratory of Natural Products Chemistry, School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichibancho, Wakayama, 640-8156, Japan
| | - Chiaki Tanaka
- Laboratory of Natural Products Chemistry, School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichibancho, Wakayama, 640-8156, Japan
| | - Masayoshi Arai
- Laboratory of Natural Products for Drug Discovery, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-Oka, Suita, Osaka, 565-0871, Japan
| | - Masaru Hashimoto
- Department of Biochemistry and Molecular Biology, Faculty of Agriculture and Life Science, Hirosaki University, 3-Bunkyo-Cho, Hirosaki, 036-8561, Japan
| | - Yuki Yoshida
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, 1-1-1 Idai-Dori, Yahaba-Cho, Shiwa-Gun, Iwate, 028-3694, Japan
| | - Tomikazu Kawano
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, 1-1-1 Idai-Dori, Yahaba-Cho, Shiwa-Gun, Iwate, 028-3694, Japan
| | - Satoru Tamura
- Laboratory of Natural Products Chemistry, School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichibancho, Wakayama, 640-8156, Japan.
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Yamamoto S, Sato I, Fujii M, Kakimoto M, Honma K, Kirihara S, Nakayama H, Fukuoka T, Tamura S, Ueda M, Hirohata S, Watanabe S. Therapeutic effect of ouabagenin, a novel liver X receptor agonist, on atherosclerosis in nonalcoholic steatohepatitis in SHRSP5/Dmcr rat model. Can J Physiol Pharmacol 2023; 101:455-465. [PMID: 37224568 DOI: 10.1139/cjpp-2022-0532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The liver X receptor (LXR) can enhance cholesterol transporters, which could remove excess cholesterol from foam cells in atheromas. LXR has two subtypes: LXRα, which aggravates hepatic lipid accumulation, and LXRβ, which does not. In 2018, ouabagenin (OBG) was reported as a potential LXRβ-specific agonist. We aimed to examine whether OBG specifically affects LXRβ in nonalcoholic steatohepatitis (NASH); it did not aggravate hepatic steatosis and can suppress the development of atherosclerosis. SHRSP5/Dmcr rats fed a high-fat and high-cholesterol diet were divided into four groups as follows: (I) L-NAME group, (II) L-NAME/OBG group, (III) OBG (-) group, and (IV) OBG (+) group. All groups' rats were intraperitoneally administered L-NAME. The L-NAME/OBG group's rats were intraperitoneally administered OBG and L-NAME simultaneously. After L-NAME administration, the OBG (+) group's rats were administered OBG, while the OBG (-) group's rats were not. Although all rats developed NASH, OBG did not exacerbate steatosis (L-NAME/OBG and OBG (+) groups). In addition, endothelial cells were protected in the L-NAME/OBG group and foam cells in the atheroma were reduced in the OBG (+) group. OBG is an LXRβ-specific agonist and has a potential therapeutic effect on atherosclerosis without developing lipid accumulation in the liver.
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Affiliation(s)
- Shusei Yamamoto
- Faculty of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Ikumi Sato
- Faculty of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Moe Fujii
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
- Department of Medical Technology, Ehime Prefectural University of Health Sciences, 543 Takoda, Tobe-cho, Iyo-gun, Ehime 791-2101, Japan
| | - Mai Kakimoto
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Koki Honma
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Sora Kirihara
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Hinako Nakayama
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Taketo Fukuoka
- Department of Medical Technology, Faculty of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Satoru Tamura
- School of Pharmaceutical Sciences, Wakayama Medical University, 25-1 Shichibancho, Wakayama-shi, Wakayama 640-8156, Japan
| | - Minoru Ueda
- Department of Chemistry, Graduate School of Life Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai-shi, Miyagi 980-8578, Japan
| | - Satoshi Hirohata
- Faculty of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
| | - Shogo Watanabe
- Faculty of Health Sciences, Okayama University, 2-5-1 Shikata-cho, Kita-ku, Okayama-shi, Okayama 700-8558, Japan
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Kaneko Y, Fukuda K, Irie T, Shimizu H, Tamura S, Kobari T, Hasegawa H, Nakajima T, Ishii H. Electrophysiological characteristics and catheter ablation of atypical fast-slow atrioventricular nodal reentrant tachycardia using an inferolateral left atrial slow pathway. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.643] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Understandings of subtypes of atypical atrioventricular nodal reentrant tachycardia (AVNRT) using variants of slow pathway (SP) are still growing. Inferolateral (inf-lat-) left atrial (LA) SP is a rare variant extending into an inf-lat-LA along the mitral annulus (MA).
Purpose
To characterize an unknown subtype of atypical fast-slow (F/S-) AVNRT using an inf-lat-LA-SP as a retrograde limb (inf-lat-LA-F/S-AVNRT).
Methods
This Japanese multicenter retrospective study enrolled 4 patients of inf-lat-LA-F/S-AVNRT that was characterized by the earliest site of atrial activation during tachycardia (EAA) between 3 and 6 o'clock along the MA. The diagnosis was made by an exclusion of AV reentrant tachycardia (AVRT) and atrial tachycardia (AT) according to the standard criteria and was confirmed by successful elimination of tachycardia and the inf-lat-LA-SP.
Results
Surface ECG during tachycardia revealed long RP appearance except one who had short RP due to a short conduction time across the inf-lat-LA-SP. During tachycardia, far-field LA activation preceding near-field activation of coronary sinus (CS) musculature was visible in the CS recording in 2. Retrograde conduction via the inf-lat-LA-SP with a decremental delay was consistently reproducible with ventricular stimulation in 2, 1 of whom had double atrial response, while it was always masked by the presence of a retrograde conduction via the fast pathway in 1 and a retrograde block at the lower common pathway in 1. An injection of a small dose of ATP transiently interrupted a retrograde conduction over the inf-lat-LA-SP, suggesting its ATP-sensitivity. Exclusion of AVRT was made by no resetting of tachycardia with left ventricular extrastimulus in 2 and VA dissociation during overdrive pacing of tachycardia in remaining 2. Exclusion of AT was made by V-A-V response after ventricular entrainment in 1 and termination without atrial capture by ventricular pacing in 2. Ablation of the right-sided SP was unsuccessful to eliminate the tachycardia, but ablation at or near the EAA by transseptal approach was successful to cure the tachycardia, associated with an elimination of a retrograde conduction over the inf-lat-LA-SP following a development of an accelerated junction rhythm in all. Low-frequency potentials preceding local atrial activation, consistent with a retrograde activation via the inf-lat-LA-SP were detected along the MA medial to the EAA in 1.
Conclusions
Differential diagnosis of tachycardia with the EAA in the inf-lat-LA and especially long RP appearance should include inf-lat-LA-F/S-AVNRT. Presumed arrhythmogenic substrate of the inf-lat-LA-SP seemed to be consistent with the remnant of embryogenic AV ring tissue in the electropharmacological and locational characteristics. Successful elimination of this AVNRT can be obtained by ablation of the inf-lat-LA-SP, but not of the right-sided SP.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Kaneko
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - K Fukuda
- International University of Health and Welfare Hospital, Department of Cardiology , Nasushiobara , Japan
| | - T Irie
- Saitama Sekishinkai Hospita, Department of Cardiology , Sayama , Japan
| | - H Shimizu
- Saiseikai Niigata Hospital, Department of Cardiology , Niigata , Japan
| | - S Tamura
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - T Kobari
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - H Hasegawa
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - T Nakajima
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
| | - H Ishii
- Gunma University Graduate School of Medicine, Maebashi , Gunma , Japan
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4
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Tamura S. Was the 'alternating head tilt' a 'positioning head tilt'? J Small Anim Pract 2021; 63:84. [PMID: 34786724 DOI: 10.1111/jsap.13447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 08/26/2021] [Accepted: 10/07/2021] [Indexed: 11/27/2022]
Affiliation(s)
- S Tamura
- Tamura Animal Clinic, Hiroshima, 731-5132, Japan
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5
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Kaneko Y, Nakajima T, Tamura S, Hasegawa H, Kobari T, Nagashima K. Fast-slow atrioventricular nodal reentrant tachycardia phenotype mimicking the slow-slow type. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0599] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Fast-slow (F/S-) atrioventricular (AV) nodal reentrant tachycardia (AVNRT) is characterized by a short atrio-His (AH) interval and the earliest site of atrial activation (EAA) in the proximal coronary sinus (EAA-CS), while slow-slow (S/S-) AVNRT presents a long AH interval and EAA-CS. Those intracardiac appearances are initial indicators for making a diagnosis.
Purpose
To identify an unknown phenotype of F/S-AVNRT.
Methods
Among 46 consecutive patients with F/S-AVNRT, 6 patients (1 man, age 59±9) had an apparent but not typical (pseudo-) S/S-AVNRT during an electrophysiologic study. In 2 patients, pseudo-S/S-AVNRT was clinically documented.
Results
In all 6 patients, the diagnosis of F/S-AVNRT was made by an exclusion of atrial tachycardia with findings of 1) a V-A-V response following ventricular entrainment or 2) termination without atrial capture by ventricular pacing, and an exclusion of AV reentrant tachycardia with a ventriculoatrial dissociation during an initial (so-called QRS transition) zone of ventricular entrainment. An initial A-A-V activation sequence on atrial induction of F/S-AVNRT observed in 1 patient and Wenckebach-type AV block during ongoing F/S-AVNRT developing in 3 patients suggested the presence of the lower common pathway (LCP). Like the typical S/S-AVNRT, pseudo-S/S-AVNRT was induced with atrial stimulation after a jump in the AH interval or double ventricular response. However, in all patients, the pseudo-S/S-AVNRT transited to F/S-AVNRT following AV block in a single cycle and/or pseudo-S/S-AVNRT transited from spontaneously or triggered by atrial contractions. Importantly, on these transitions, the atrial cycle length (CL) and EAA-CS remained unchanged, that is, the atrial CL of S/S-AVNRT was almost identical to that of F/S-AVNRT, suggesting that the essential circuit of both tachycardias was identical. Actually, both tachycardias were cured by ablation at a single site in the traditional slow pathway (SP). Collectively, the pseudo-S/S-AVNRT was diagnosed as another phenotype of F/S-AVNRT accompanied by sustained antegrade conduction via another bystander (likely the left-sided or superior) SP breaking through the His bundle owing to the repetitive antegrade block at the LCP occurring by linking phenomenon, thus representing a long AH interval during the ongoing F/S-AVNRT. When the antegrade conduction is blocked at the bystander SP during the pseudo-S/S-AVNRT, releasing the linking phenomenon, the subsequent antegrade conduction reach the His-bundle via the fast pathway, thus returning to F/S-AVNRT.
Conclusions
An unknown, but not rare F/S-AVNRT phenotype exists that apparently mimics the typical S/S-AVNRT and is also an unknown subtype of apparent S/S-AVNRT. The presence of this pseudo-S/S-AVNRT suggests the limitation of classifying types of AVNRT based on AH and HA intervals during tachycardia. Understandings of this phenotype can advance a diagnosis of atypical AVNRT with multiple phenotypes.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- Y Kaneko
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - T Nakajima
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - S Tamura
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - H Hasegawa
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - T Kobari
- Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
| | - K Nagashima
- Nihon University School of Medicine, Division of Cardiology, Department of Medicine, Tokyo, Japan
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Ahmadi P, Muguruma K, Chang TC, Tamura S, Tsubokura K, Egawa Y, Suzuki T, Dohmae N, Nakao Y, Tanaka K. In vivo metal-catalyzed SeCT therapy by a proapoptotic peptide. Chem Sci 2021; 12:12266-12273. [PMID: 34603656 PMCID: PMC8480321 DOI: 10.1039/d1sc01784e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 08/16/2021] [Indexed: 01/03/2023] Open
Abstract
Selective cell tagging (SeCT) therapy is a strategy for labeling a targeted cell with certain chemical moieties via a catalytic chemical transformation in order to elicit a therapeutic effect. Herein, we report a cancer therapy based on targeted cell surface tagging with proapoptotic peptides (Ac-GGKLFG-X; X = reactive group) that induce apoptosis when attached to the cell surface. Using either Au-catalyzed amidation or Ru-catalyzed alkylation, these proapoptotic peptides showed excellent therapeutic effects both in vitro and in vivo. In particular, co-treatment with proapoptotic peptide and the carrier-Ru complex significantly and synergistically inhibited tumor growth and prolonged survival rate of tumor-bearing mice after only a single injection. This is the first report of Ru catalyst application in vivo, and this approach could be used in SeCT for cancer therapy.
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Affiliation(s)
- Peni Ahmadi
- Biofunctional Synthetic Chemistry, RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Kyohei Muguruma
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology 2-12-1 Ookayama Meguro Tokyo 152-8552 Japan
| | - Tsung-Che Chang
- Biofunctional Synthetic Chemistry, RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Satoru Tamura
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University Yahaba Iwate 028-3694 Japan
| | - Kazuki Tsubokura
- Biofunctional Synthetic Chemistry, RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Yasuko Egawa
- Biofunctional Synthetic Chemistry, RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Takehiro Suzuki
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Naoshi Dohmae
- Biomolecular Characterization Unit, RIKEN Center for Sustainable Resource Science 2-1 Hirosawa Wako Saitama 351-0198 Japan
| | - Yoichi Nakao
- School of Advanced Science and Engineering, Department of Chemistry and Biochemistry, Waseda University 3-4-1 Okubo Shinjuku Tokyo 169-8555 Japan
| | - Katsunori Tanaka
- Biofunctional Synthetic Chemistry, RIKEN Cluster for Pioneering Research 2-1 Hirosawa Wako Saitama 351-0198 Japan
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology 2-12-1 Ookayama Meguro Tokyo 152-8552 Japan
- Biofunctional Chemistry Laboratory, A. Butlerov Institute of Chemistry, Kazan Federal University 18 Kremlyovskaya Street Kazan 420008 Russia
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Yamasaki M, Takiguchi S, Omori T, Hirao M, Imamura H, Fujitani K, Tamura S, Akamaru Y, Kishi K, Fujita J, Hirao T, Demura K, Matsuyama J, Takeno A, Ebisui C, Takachi K, Takayama O, Fukunaga H, Okada K, Adachi S, Fukuda S, Matsuura N, Saito T, Takahashi T, Kurokawa Y, Yano M, Eguchi H, Doki Y. Multicenter prospective trial of total gastrectomy versus proximal gastrectomy for upper third cT1 gastric cancer. Gastric Cancer 2021; 24:535-543. [PMID: 33118118 DOI: 10.1007/s10120-020-01129-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [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: 07/10/2020] [Accepted: 09/28/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND The appropriate surgical procedure for patients with upper third early gastric cancer is controversial. We compared total gastrectomy (TG) with proximal gastrectomy (PG) in this patient population. METHODS A multicenter, non-randomized trial was conducted, with patients treated with PG or TG. We compared short- and long-term outcomes between these procedures. RESULTS Between 2009 and 2014, we enrolled 254 patients from 22 institutions; data from 252 were included in the analysis. These 252 patients were assigned to either the PG (n = 159) or TG (n = 93) group. Percentage of body weight loss (%BWL) at 1 year after surgery, i.e., the primary endpoint, in the PG group was significantly less than that of the TG group (- 12.8% versus - 16.9%; p = 0.0001). For short-term outcomes, operation time was significantly shorter for PG than TG (252 min versus 303 min; p < 0.0001), but there were no group-dependent differences in blood loss and postoperative complications. For long-term outcomes, incidence of reflux esophagitis in the PG group was significantly higher than that of the TG group (14.5% versus 5.4%; p = 0.02), while there were no differences in the incidence of anastomotic stenosis between the two (5.7% versus 5.4%; p = 0.92). Overall patient survival rates were similar between the two groups (3-year survival rates: 96% versus 92% in the PG and TG groups, respectively; p = 0.49). CONCLUSIONS Patients who underwent PG were better able to control weight loss without worsening the prognosis, relative to those in the TG group. Optimization of a reconstruction method to reduce reflux in PG patients will be important.
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Affiliation(s)
- Makoto Yamasaki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2-E2, Yamadaoka, Suita, Osaka, 565-0879, Japan.
| | - S Takiguchi
- Department of Gastroenterological Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - T Omori
- Department of Surgery, Osaka International Cancer Institute, Osaka, Japan
| | - M Hirao
- Department of Surgery, National Hospital Organization, Osaka National Hospital, Osaka, Japan
| | - H Imamura
- Department of Surgery, Toyonaka Municipal Hospital, Osaka, Japan
| | - K Fujitani
- Department of Surgery, Osaka General Medical Center, Osaka, Japan
| | - S Tamura
- Department of Surgery, Yao Municipal Hospital, Osaka, Japan
| | - Y Akamaru
- Department of Surgery, Ikeda Municipal Hospital, Osaka, Japan
| | - K Kishi
- Department of Surgery, Osaka Police Hospital, Osaka, Japan
| | - J Fujita
- Department of Surgery, Sakai City Medical Center, Osaka, Japan
| | - T Hirao
- Department of Surgery, Japan Community Health Care Organization Osaka Hospital, Osaka, Japan
| | - K Demura
- Department of Surgery, Japan Community Health Care Organization Osaka Hospital, Osaka, Japan
| | - J Matsuyama
- Department of Surgery, Higashiosaka City Medical Center, Osaka, Japan
| | - A Takeno
- Department of Surgery, Kansai Rosai Hospital, Hyogo, Japan
| | - C Ebisui
- Department of Surgery, Suita Municipal Hospital, Osaka, Japan
| | - K Takachi
- Department of Surgery, Kinki Central Hospital, Hyogo, Japan
| | - O Takayama
- Department of Surgery, Saiseikai Senri Hospital, Osaka, Japan
| | - H Fukunaga
- Department of Surgery, Itami Municipal Hospital, Osaka, Japan
| | - K Okada
- Department of Surgery, Hyogo Prefectural Nishinomiya Hospital, Hyogo, Japan
| | - S Adachi
- Department of Surgery, Nishinomiya Municipal Central Hospital, Hyogo, Japan
| | - S Fukuda
- Department of Surgery, Kindai University Nara Hospital, Osaka, Japan
| | - N Matsuura
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2-E2, Yamadaoka, Suita, Osaka, 565-0879, Japan
| | - T Saito
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2-E2, Yamadaoka, Suita, Osaka, 565-0879, Japan
| | - T Takahashi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2-E2, Yamadaoka, Suita, Osaka, 565-0879, Japan
| | - Y Kurokawa
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2-E2, Yamadaoka, Suita, Osaka, 565-0879, Japan
| | - M Yano
- Department of Surgery, Suita Municipal Hospital, Osaka, Japan
| | - H Eguchi
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2-E2, Yamadaoka, Suita, Osaka, 565-0879, Japan
| | - Y Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, 2-2-E2, Yamadaoka, Suita, Osaka, 565-0879, Japan
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8
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Yamamoto S, Satoh I, Kakimoto M, Fujii M, Matsui M, Takahashi Y, Mirokuin K, Ran S, Tamura S, Hirohata S, Watanabe S. The novel liver x receptor beta agonist, ouabagenin, prevent arterial lipid deposition in SHRSP5/DMCR rat. Atherosclerosis 2020. [DOI: 10.1016/j.atherosclerosis.2020.10.429] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Yamamoto S, Satoh I, Kakimoto M, Fujii M, Matsui M, Takahashi Y, Mirokuin K, Ran S, Tamura S, Hirohata S, Watanabe S. The novel liver X receptor beta agonist, ouabagenin, prevent arterial lipid deposition in SHRSP5/Dmcr rat. Atherosclerosis 2020. [DOI: 10.1016/j.atherosclerosis.2020.10.431] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Tamura S, Shimoyama Y, Hong D, Kon Y. Selective aerobic oxidation of allyl phenyl ether to methyl ketone by palladium–polyoxometalate hybrid catalysts. Molecular Catalysis 2020. [DOI: 10.1016/j.mcat.2020.111178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Morikawa T, Tamura S, Wang T. Editorial: Discovery and Total Synthesis of Bio-functional Natural Products From Traditional Medicinal Plants. Front Chem 2020; 8:650. [PMID: 32974270 PMCID: PMC7472932 DOI: 10.3389/fchem.2020.00650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 11/17/2022] Open
Affiliation(s)
- Toshio Morikawa
- Pharmaceutical Research and Technology Institute, Kindai University, Osaka, Japan
| | - Satoru Tamura
- School of Pharmacy, Iwate Medical University, Iwate, Japan
| | - Tao Wang
- Institute of TCM, Tianjin University of Traditional Chinese Medicine, Tianjin, China
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12
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Tamura S, Haruyama S, Ogami A, Yokoyama A, Okuno T, Kubono Y, Takakura K, Esumi S. Health guidance for prevention of lifestyle-related diseases using health-related mobile applications. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.582] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Issue
Lifestyle modifications are essential for the prevention of lifestyle-related diseases such as hypertension, hyperlipidaemia, and type 2 diabetes. Healthcare providers in Japan are required to use information and communications technologies (ICT), such as health-related mobile applications (mHealth apps), in health guidance.
Description of the Problem
To understand the results of and issues in health guidance, two searches were conducted to identify the domains of health guidance provided using ICT. We searched the PubMed and Japan Medical Abstracts Society databases to identify articles published from 2000-2018. The first search identified frameworks of health guidance provided using ICT. The second search identified primary studies about using mHealth apps published between 2000 and 2018. The sample comprised 22 unique programs from 38 primary studies. The following research questions were explored: 1) What is the purpose of using the mHealth app?
2) Is there a significant difference in the effect of using the mHealth app instead of face-to-face communication?
Results
The mHealth app was used to enhance convenience and to improve or modify lifestyle. The latter included self-monitoring, typing health information, providing knowledge, sharing information, providing encouragement and praise, and correction of action plans. Some positive effects were observed, including compensating for insufficient information, enhancing self-management, and improving degrees of satisfaction of users. Only two programs did not report a significant difference in the effect of using the mHealth app as compared to face-to-face communication.
Lessons
This review showed that the frequency of typing information about diet and exercise appeared to be related to the prevention of primary lifestyle-related diseases and the improvement of self-management behaviour.
Key messages
Use of the mHealth app for providing health guidance might enhance continuous support for self-monitoring and self-management behaviour. Use the mHealth app for providing encouragement and praise might promote a smooth conversation, which in turn would facilitate appropriate self-management behaviour.
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Affiliation(s)
- S Tamura
- Academic Assembly, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - S Haruyama
- Faculty of Nursing, Jichi Medical University, Tochigi, Japan
| | - A Ogami
- Ogami Occupational Health Consulting Office, Tokyo, Japan
| | - A Yokoyama
- Faculty of Nursing, Jichi Medical University, Tochigi, Japan
| | - T Okuno
- Nippon Express Corporation, Toyama, Japan
| | - Y Kubono
- Faculty of Nursing, Niigata College of Nursing, Niigata, Japan
| | - K Takakura
- Academic Assembly, Faculty of Medicine, University of Toyama, Toyama, Japan
| | - S Esumi
- Faculty of Nursing, Jichi Medical University, Tochigi, Japan
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Tamura S, Miyoshi A, Kawano T, Horii T, Itagaki S, Murakami N. Structure-Activity Relationship of Anti-malarial Allylpyrocatechol Isolated from Piper betle. Chem Pharm Bull (Tokyo) 2020; 68:784-790. [PMID: 32741921 DOI: 10.1248/cpb.c20-00294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Malaria disease remains a serious worldwide health problem. In South-East Asia, one of the malaria infection "hot-spots," medicinal plants such as Piper betle have traditionally been used for the treatment of malaria, and allylpyrocatechol (1), a constituent of P. betle, has been shown to exhibit anti-malarial activities. In this study, we verified that 1 showed in vivo anti-malarial activity through not only intraperitoneal (i.p.) but also peroral (p.o.) administration. Additionally, some analogs of 1 were synthesized and the structure-activity relationship was analyzed to disclose the crucial sub-structures for the potent activity.
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Affiliation(s)
- Satoru Tamura
- School of Pharmacy, Iwate Medical University.,Graduate School of Pharmaceutical Sciences, Osaka University
| | - Akihito Miyoshi
- Graduate School of Pharmaceutical Sciences, Osaka University
| | | | | | - Sawako Itagaki
- Research Institute for Microbial Diseases, Osaka University
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14
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Tsujihara T, Yamauchi H, Tamura S, Takehara T, Suzuki T, Kawano T. Diastereoselective direct amidation/aza-Michael cascade reaction to synthesize cis-1,3-disubstituted isoindolines. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152122] [Citation(s) in RCA: 2] [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: 01/25/2023]
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15
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Morioka D, Tamura S. Nonsurgical enucleation of plantar epidermal cysts using salicylic acid plaster. Dermatol Ther 2020; 33:e13879. [PMID: 32558068 DOI: 10.1111/dth.13879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Revised: 06/15/2020] [Accepted: 06/17/2020] [Indexed: 11/26/2022]
Affiliation(s)
- Daichi Morioka
- Department of Plastic Surgery, Showa University, Tokyo, Japan
| | - Satoru Tamura
- Department of Plastic Surgery, Showa University, Tokyo, Japan
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Fukudome I, Dabanaka K, Okabayashi T, Shima Y, Okamoto K, Tamura S, Hanazaki K, Kobayashi M. A 58-year-old Woman with Mesh Migration into the Transverse Colon. Am Surg 2020. [DOI: 10.1177/000313481408000203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Ian Fukudome
- Department of Surgery Kochi Medical School Kochi, Japan
| | - Ken Dabanaka
- Department of Surgery Kochi Medical School Kochi, Japan
| | | | - Yasuo Shima
- Department of Surgery Kochi Health Sciences Center Kochi, Japan
| | - Ken Okamoto
- Department of Surgery Kochi Medical School Kochi, Japan
| | - Satoru Tamura
- Division of Gastroenterology Tamura Clinic Kochi, Japan
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Affiliation(s)
- Daichi Morioka
- Department of Plastic Surgery, Showa University, Tokyo, Japan
| | - Satoru Tamura
- Department of Plastic Surgery, Showa University, Tokyo, Japan
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Tamura S, Sugawara A, Sato E, Sato F, Sato K, Kawano T. New approach for induction of alkyl moiety to aliphatic amines by NaBH(OAc)3 with carboxylic acid. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151919] [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: 10/24/2022]
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19
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Shimoyama Y, Tamura S, Kitagawa Y, Hong D, Kon Y. A cobalt-substituted Keggin-type polyoxometalate for catalysis of oxidative aromatic cracking reactions in water. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01758b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxidative aromatic cracking reactions in water were achieved using a catalytic system with a cobalt-substituted Keggin-type polyoxometalate as a catalyst, an Oxone® as a sacrificial oxidant and sodium bicarbonate as an additive under mild conditions.
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Affiliation(s)
- Yoshihiro Shimoyama
- Interdisciplinary Research Center for Catalytic Chemistry
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - Satoru Tamura
- Institute for Energy and Material/Food Resources
- Technology Innovation Division
- Panasonic Corporation
- Kadoma City
- Japan
| | - Yasutaka Kitagawa
- Department of Materials Engineering Science
- Graduate School of Engineering Science
- Osaka University
- Toyonaka
- Japan
| | - Dachao Hong
- Interdisciplinary Research Center for Catalytic Chemistry
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
- Global Zero Emission Research Center
| | - Yoshihiro Kon
- Interdisciplinary Research Center for Catalytic Chemistry
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
- Global Zero Emission Research Center
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20
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Kawano T, Sugawara A, Ohashi T, Ogawa S, Matsumoto N, Nakanishi-Matsui M, Tamura S. Synthesis and Biological Evaluation of New Curcumin Analogs Inhibiting Osteoclastogenesis. HETEROCYCLES 2020. [DOI: 10.3987/com-20-14282] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Tsujihara T, Tomeba M, Ohkubo-Sato S, Iwabuchi K, Koie R, Tada N, Tamura S, Takehara T, Suzuki T, Kawano T. One-pot reactions of bicyclic zinc enolate generated from Ni-catalyzed reductive cyclization to furnish octahydro-4,7-ethanobenzofuran-9-one derivatives. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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22
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Kanno M, Miura K, Masaki Y, Tsujimura H, Iino M, Takizawa J, Maeda Y, Yamamoto K, Tamura S, Yoshida A, Yagi H, Yoshida I, Kitazume K, Masunari T, Choi I, Kakinoki Y, Suzuki R, Yoshino T, Nakamura S, Yoshida T. CONSOLIDATION THERAPY USING 90
Y-IBRITUMOMAB TIUXETAN AFTER BENDAMUSTINE AND RITUXIMAB FOR RELAPSED FOLLICULAR LYMPHOMA; A MULTICENTER, PHASE II STUDY (BRiZ2012). Hematol Oncol 2019. [DOI: 10.1002/hon.61_2631] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- M. Kanno
- Oncology Center; Nara Medical University Hospital; Kashihara Japan
| | - K. Miura
- Division of Hematology and Rheumatology; Nihon University School of Medicine; Tokyo Japan
| | - Y. Masaki
- Department of Hematology and Immunology; Kanazawa Medical University; Ishikawa Japan
| | - H. Tsujimura
- Division of Medical Oncology; Chiba Cancer Center; Chiba Japan
| | - M. Iino
- Department of Medical Oncology; Yamanashi Prefectural Central Hospital; Kofu Japan
| | - J. Takizawa
- Department of Hematology; Endocrinology and Metabolism, Niigata University Faculty of Medicine; Niigata Japan
| | - Y. Maeda
- Department of Hematology and Oncology; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
| | - K. Yamamoto
- Department of Hematology; Okayama City Hospital; Okayama Japan
| | - S. Tamura
- Department of Hematology/Oncology; Kinan Hospital; Tanabe Japan
| | - A. Yoshida
- Department of Hematology; Toyama Prefectural Central Hospital; Toyama Japan
| | - H. Yagi
- Department of Hematology and Oncology; Nara Prefecture General Medical Center; Nara Japan
| | - I. Yoshida
- Department of Hematologic Oncology; National Hospital Organization, Shikoku Cancer Center; Matsuyama Japan
| | - K. Kitazume
- Department of Hematology; Showa General Hospital; Kodaira Japan
| | - T. Masunari
- Department of Infectious Diseases; Chugoku Central Hospital; Fukuyama Japan
| | - I. Choi
- Department of Hematology; National Hospital Organization, Kyushu Cancer Center; Fukuoka Japan
| | - Y. Kakinoki
- Department of Hematology; Asahikawa City Hospital; Ashikawa Japan
| | - R. Suzuki
- Department of Oncology/Hematology, Innovative Cancer Center; Shimane University Hospital; Izumo Japan
| | - T. Yoshino
- Department of Pathology; Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences; Okayama Japan
| | - S. Nakamura
- Department of Pathology and Biological Response; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - T. Yoshida
- Member; Society of Lymphoma Treatment in Japan (SoLT-J); Kanazawa Japan
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Kitano Y, Wakimoto S, Tamura S, Kubota K, Domon Y, Arakawa N, Saito M, Sava B, Buisson B. Effects of mirogabalin, a novel ligand for the α₂δ subunit of voltage-gated calcium channels, on N-type calcium channel currents of rat dorsal root ganglion culture neurons. Pharmazie 2019; 74:147-149. [PMID: 30961679 DOI: 10.1691/ph.2019.8833] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Mirogabalin, which is a novel ligand for the α₂δ subunit of voltage-gated calcium channels, is being developed for treating neuropathic pain including diabetic peripheral neuropathy and postherpetic neuralgia. Mirogabalin possesses unique α₂δ subunit binding characteristics and has potent and long-lasting analgesic effects in neuropathic pain models. In the present study, we investigated the effects of mirogabalin on N-type calcium channel currents of the rat dorsal root ganglion (DRG) culture neurons using the whole-cell patch clamp technique. Small or medium DRG neurons were isolated from Sprague-Dawley rats and were incubated for 20 to 24 h with mirogabalin or pregabalin. The DRG neurons were depolarised from a holding potential of -40 mV to +40 mV in steps of 10 mV for 220 ms, and elicited N-type calcium channel currents were recorded. The N-type calcium channel currents were verified by sensitivity to ω-conotoxin GVIA, a selective N-type calcium channel blocker. Mirogabalin inhibited the calcium channel currents of rat DRG neurons at 50 μM, and pregabalin inhibited them at 200 μM. Mirogabalin and pregabalin showed significant differences in the peak current densities at depolarisation to -20 and -10 mV when compared with that shown by the vehicle control. In conclusion, mirogabalin inhibits N-type calcium channel currents in rat DRG culture neurons. The potent and long-lasting analgesic effects of mirogabalin are thought to be associated with its potent and selective binding to α₂δ-1 subunits and following functional inhibition of calcium channel currents.
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Tamura S, Yoshihira K, Kawano T, Murakami N. Inhibitor for FcεRI expression on mast cell from Verbasucum thapsus L. Bioorg Med Chem Lett 2018; 28:3342-3345. [DOI: 10.1016/j.bmcl.2018.09.007] [Citation(s) in RCA: 2] [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] [Received: 04/02/2018] [Revised: 08/29/2018] [Accepted: 09/06/2018] [Indexed: 11/17/2022]
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Inagaki S, Saito K, Suto S, Aihara H, Sugawara A, Tamura S, Kawano T. Synthesis of 5-Aryl-3(2H)-furanones Using Intramolecular Cyclization of Sulfonium Salts. J Org Chem 2018; 83:13834-13846. [DOI: 10.1021/acs.joc.8b02153] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sho Inagaki
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Kai Saito
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Soichiro Suto
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Hiromi Aihara
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Aoi Sugawara
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Satoru Tamura
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Tomikazu Kawano
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
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Kanno M, Miura K, Masaki Y, Tsujimura H, Iino M, Takizawa J, Maeda Y, Yamamoto K, Tamura S, Yoshida A, Yagi H, Yoshida I, Kitazume K, Masunari T, Choi I, Kakinoki Y, Yoshino T, Nakamura S, Yoshida T. Bendamustine and rituximab followed by 90Y-ibritumomab tiuxetan for relapsed follicular lymphoma: A preliminary analysis of a multicenter, prospective phase II study (BRiZ2012). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy286.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Sato Y, Mizusawa J, Nakamura K, Fukagawa T, Katai H, Haruta S, Yamada M, Takagi M, Tamura S, Yoshimura T, Inada T, Hirabayashi N, Wada I, Kodera Y, Tokunaga M, Yoshikawa T, Boku N, Sano T, Sasako M, Terashima M. Diagnosis of invasion depth in resectable advanced gastric cancer for neoadjuvant chemotherapy: An exploratory analysis of JCOG1302A. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy282.040] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Tamura S, Yang GM, Koitabashi T, Matsuura Y, Komoda Y, Kawano T, Murakami N. Oenothein B, dimeric hydrolysable tannin inhibiting HCV invasion from Oenothera erythrosepala. J Nat Med 2018; 73:67-75. [PMID: 30132241 DOI: 10.1007/s11418-018-1239-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 08/13/2018] [Indexed: 11/25/2022]
Abstract
The envelope proteins of the hepatitis C virus (HCV), E1 and E2, have been revealed to be essential for invasion of HCV. Thus, we were engaged in the search for the inhibitors against HCV invasion through the assay system using the model virus expressing recombinant HCV envelopes, E1 and E2. Now, we disclosed dimeric hydrolysable tannin oenothein B (1) from MeOH extract of Oenothera erythrosepala as an active principle for inhibition of HCV invasion and its potency was almost the same as that of monomeric hydrolysable tannin, tellimagrandin I (2). Furthermore, by use of stereoselectively prepared 1-β- and 1-α-O-methyl tellimagrandin Is (4 and 5), the introduction of methyl moiety into 1-hydroxy group of 2 was clarified to result in slightly reduction of activity and β-isomer was revealed to exhibit a little stronger activity than α-one.
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Affiliation(s)
- Satoru Tamura
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan. .,School of Pharmacy, Iwate Medical University, 2-1-1 Nishitokuda Yahaba-cho Siwa-gun, Iwate, 019-3694, Japan.
| | - Gang-Ming Yang
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Teruaki Koitabashi
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Yoshiharu Matsuura
- Research Center for Emerging Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Yasumasa Komoda
- Research Center for Emerging Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamada-oka, Suita, Osaka, 565-0871, Japan
| | - Tomikazu Kawano
- School of Pharmacy, Iwate Medical University, 2-1-1 Nishitokuda Yahaba-cho Siwa-gun, Iwate, 019-3694, Japan
| | - Nobutoshi Murakami
- Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamada-oka, Suita, Osaka, 565-0871, Japan
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Shinoda N, Mori M, Tamura S, Korosue K, Kose S, Kohmura E. Three-dimensional shaping technique for coil placement using the steam-shaped microcatheter for ruptured blood blister-like aneurysm. Neurochirurgie 2018; 64:216-218. [PMID: 29907359 DOI: 10.1016/j.neuchi.2018.04.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/21/2018] [Accepted: 04/13/2018] [Indexed: 11/28/2022]
Abstract
Treatment of blood blister-like aneurysm (BBA) is a challenge due to its unfavourable morphology, small size and the friable neck of BBA. In the management of ruptured BBA, coil placement can be achieved by stent-assisted coil embolisation. We propose to incorporate a new technique using a steam-shaped microcatheter to improve safety. A 59-year-old woman was transferred to our hospital and diagnosed with subarachnoid haemorrhage (SAH) due to a ruptured BBA of the left internal carotid artery (ICA) at the C2 portion. For coil embolisation, we selected the aneurysm sac using a three-dimensional shaping technique and the jailing method. Post-embolisation angiography revealed complete occlusion of the aneurysmal sac. For safe treatment and stability of BBA, the shape of the catheter tip and the distal portion of the microcatheter are two important factors to consider. The proposed technique could help resolve the problem of catheter shaping in the treatment of BBA.
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Affiliation(s)
- N Shinoda
- Department of Neurosurgery, Kosei Hospital, Kobe, Japan.
| | - M Mori
- Department of Neurosurgery, Kosei Hospital, Kobe, Japan
| | - S Tamura
- Department of Neurosurgery, Kosei Hospital, Kobe, Japan
| | - K Korosue
- Department of Neurosurgery, Kosei Hospital, Kobe, Japan
| | - S Kose
- Department of Neurosurgery, Kosei Hospital, Kobe, Japan
| | - E Kohmura
- Department of Neurosurgery, Kobe University Hospital, Kobe, Japan
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Sasaki T, Shirai T, Tsukiji N, Otake S, Tamura S, Ichikawa J, Osada M, Satoh K, Ozaki Y, Suzuki-Inoue K. Functional characterization of recombinant snake venom rhodocytin: rhodocytin mutant blocks CLEC-2/podoplanin-dependent platelet aggregation and lung metastasis. J Thromb Haemost 2018; 16:960-972. [PMID: 29488681 DOI: 10.1111/jth.13987] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Indexed: 12/11/2022]
Abstract
Essentials We generated recombinant rhodocytin that could aggregate platelets via CLEC-2. Recombinant wild-type rhodocytin formed heterooctamer with four α- and β-subunits. Asp 4 in α-subunit of rhodocytin was required for binding to CLEC-2. Inhibitory mutant of rhodocytin blocked podoplanin-dependent hematogenous metastasis. SUMMARY Background Rhodocytin, a disulfide-linked heterodimeric C-type lectin from Calloselasma rhodostoma consisting of α-subunits and β-subunits, induces platelet aggregation through C-type lectin-like receptor 2 (CLEC-2). CLEC-2 is a physiological binding partner of podoplanin (PDPN), which is expressed on some tumor cell types, and is involved in tumor cell-induced platelet aggregation and tumor metastasis. Thus, modified rhodocytin may be a possible source of anti-CLEC-2 drugs for both antiplatelet and antimetastasis therapy. However, its molecular function has not been well characterized, because of the lack of recombinant rhodocytin that induces platelet aggregation. Objective To produce recombinant rhodocytin, in order to verify its function with mutagenesis, and to develop an anti-CLEC-2 drug based on the findings. Methods We used Chinese hamster ovary cells to express recombinant rhodocytin (wild-type [WT] and mutant), which was analyzed for induction/inhibition of platelet aggregation with light transmission aggregometry, the formation of multimers with blue native PAGE, and binding to CLEC-2 with flow cytometry. Finally, we investigated whether mutant rhodocytin could suppress PDPN-induced metastasis in an experimental lung metastasis mouse model. Results Functional WT] rhodocytin (αWTβWT) was obtained by coexpression of both subunits. Asp4 in α-subunits of rhodocytin was required for CLEC-2 binding. αWTβWT formed a heterooctamer similarly to native rhodocytin. Moreover, an inhibitory mutant of rhodocytin (αWTβK53A/R56A), forming a heterotetramer, bound to CLEC-2 without inducing platelet aggregation, and blocked CLEC-2-PDPN interaction-dependent platelet aggregation and experimental lung metastasis. Conclusion These findings provide molecular characterization information on rhodocytin, and suggest that mutant rhodocytin could be used as a therapeutic agent to target CLEC-2.
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Affiliation(s)
- T Sasaki
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Kofu, Japan
| | - T Shirai
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Kofu, Japan
| | - N Tsukiji
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Kofu, Japan
| | | | - S Tamura
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - J Ichikawa
- Department of Orthopedic Surgery, Faculty of Medicine, University of Yamanashi, Kofu, Japan
| | - M Osada
- School of Medical Technology, Gunma Paz University, Takasaki, Japan
| | - K Satoh
- Division of Laboratory Medicine, University of Yamanashi Hospital, Kofu, Japan
| | - Y Ozaki
- Fuefuki Central Hospital, Fuefuki, Japan
| | - K Suzuki-Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Kofu, Japan
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Tamura S, Suga Y, Tanamura M, Murata-Kawakami M, Takagi Y, Hottori Y, Kakihara M, Suzuki S, Takagi A, Kojima T. Optimisation of antithrombin resistance assay as a practical clinical laboratory test: Development of prothrombin activator using factors Xa/Va and automation of assay. Int J Lab Hematol 2018; 40:312-319. [PMID: 29436777 DOI: 10.1111/ijlh.12786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Accepted: 01/11/2018] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Antithrombin resistance (ATR) is a novel thrombotic risk in abnormal prothrombins. A manual ATR assay using Oxyuranus scutellatus (Ox) venom as a prothrombin activator was established for detecting antithrombin-resistant prothrombin. However, this assay was limited because of Ox snake venom availability and its throughput capacity. Here, we have improved the ATR assay using bovine factors Xa and Va (FXa/Va) as prothrombin activators and have optimised assay conditions for an automated instrument (ACL TOP 500). METHODS Diluted plasma was incubated with a prothrombin activator mix (phospholipids, CaCl2 , and bovine FXa/Va), followed by inactivation with antithrombin for 10, 20 and 30 minutes. We added a chromogenic substrate S-2238, and assessed changes in absorbance/min at 405 nm. We also adapted assay conditions for ACL TOP 500. RESULTS Optimum conditions for FXa/Va treatment were 6.25% phospholipids, 5 mM CaCL2 , 0.01 μg/mL FXa and 0.1 μg/mL FVa. ATR assay kinetics with the FXa/Va activator was comparable with that with the Ox activator in heterozygous reconstituted plasma with the recombinant wild-type or antithrombin-resistant prothrombin. Using ACL TOP 500, optimum conditions for the FXa/Va treatment were 10.0% phospholipids, 5 mM CaCl2 , 0.02 μg/mL FXa and 0.2 μg/mL FVa. The automated ATR assay with the FXa/Va activator demonstrated good detectability for antithrombin-resistant prothrombin in plasma from a heterozygous carrier with prothrombin Yukuhashi or Belgrade. CONCLUSION We optimised the ATR assay with the FXa/Va activator and adapted the assay for ACL TOP 500; the assay showed the ability to clearly detect antithrombin-resistant prothrombin in manual and automated procedures.
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Affiliation(s)
- S Tamura
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Suga
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Tanamura
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Murata-Kawakami
- Department of Transfusion Medicine, Nagoya University Hospital, Nagoya, Japan
| | - Y Takagi
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Japan Society for the Promotion of Science, Tokyo, Japan
| | - Y Hottori
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - M Kakihara
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Suzuki
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - A Takagi
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Kojima
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Tamura S, Okada M, Kato S, Shinoda Y, Shioda N, Fukunaga K, Ui-Tei K, Ueda M. Ouabagenin is a naturally occurring LXR ligand without causing hepatic steatosis as a side effect. Sci Rep 2018; 8:2305. [PMID: 29396543 PMCID: PMC5797171 DOI: 10.1038/s41598-018-20663-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 01/23/2018] [Indexed: 12/23/2022] Open
Abstract
Ouabagenin (OBG) is an aglycone of the cardiotonic steroid ouabain and until now was considered a biologically inactive biosynthetic precursor. Herein, we revealed that OBG functions as a novel class of ligand for the liver X receptor (LXR). Luciferase reporter assays and in silico docking studies suggested that OBG has LXR-selective agonistic activity. In addition, OBG repressed the expression of epithelial sodium channel (ENaC), a LXR target gene, without causing hepatic steatosis, a typical side effect of conventional LXR ligands. This remarkable biological activity can be attributed to a unique mode of action; the LXR agonist activity mainly proceeds through the LXRβ subtype without affecting LXRα, unlike conventional LXR ligands. Thus, OBG is a novel class of LXR ligand that does not cause severe side effects, with potential for use as an antihypertensive diuretic or a tool compound for exploring LXR subtype-specific biological functions.
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Affiliation(s)
- Satoru Tamura
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi, 980-8578, Japan.,School of Pharmacy, Iwate Medical University, Shiwa-gun, Iwate, 028-3694, Japan
| | - Maiko Okada
- Institute of Medical Science, St. Marianna University Graduate School of Medicine, Kawasaki, Kanagawa, 970-8551, Japan.,Genome regulation and Molecular Pharmacogenomics, School of Bioscience and Biotechnology, Tokyo University of Technology, Hachioji, Tokyo, 192-0982, Japan
| | - Shigeaki Kato
- Iwaki Meisei University, Iwaki, Fukushima, 970-8551, Japan.,Research Institute of Innovative Medicine, Tokiwa Foundation, Iwaki, Fukushima, 972-8322, Japan
| | - Yasuharu Shinoda
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan
| | - Norifumi Shioda
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan
| | - Kohji Fukunaga
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai, Miyagi, 980-8578, Japan
| | - Kumiko Ui-Tei
- Graduate School of Science, The University of Tokyo, Tokyo, 113-0032, Japan
| | - Minoru Ueda
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Miyagi, 980-8578, Japan.
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Tamura S, Sato K, Kawano T. <i>N</i>-Alkylation Using Sodium Triacetoxyborohydride with Carboxylic Acids as Alkyl Sources. Chem Pharm Bull (Tokyo) 2018; 66:101-103. [DOI: 10.1248/cpb.c17-00716] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Satoru Tamura
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University
| | - Keigo Sato
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University
| | - Tomikazu Kawano
- Department of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University
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Inagaki S, Sato A, Sato H, Tamura S, Kawano T. Synthesis of 2-substituted 4,5-dihydro-4-oxo-3-furancarboxylates using acylative intramolecular cyclization of sulfonium salts. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.11.035] [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: 11/17/2022]
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Suzuki S, Nakamura Y, Suzuki N, Yamazaki T, Takagi Y, Tamura S, Takagi A, Kanematsu T, Matsushita T, Kojima T. Combined deficiency of factors V and VIII by chance coinheritance of parahaemophilia and haemophilia A, but not by mutations of either LMAN1 or MCFD2, in a Japanese family. Haemophilia 2017; 24:e13-e16. [PMID: 29082580 DOI: 10.1111/hae.13360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/19/2017] [Indexed: 11/26/2022]
Affiliation(s)
- S Suzuki
- Department of Pathophysiological Laboratory Science, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Y Nakamura
- Department of Pathophysiological Laboratory Science, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - N Suzuki
- Department of Transfusion Medicine, Nagoya University Hospital, Nagoya, Japan
| | | | - Y Takagi
- Department of Pathophysiological Laboratory Science, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - S Tamura
- Department of Pathophysiological Laboratory Science, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - A Takagi
- Department of Pathophysiological Laboratory Science, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - T Kanematsu
- Department of Clinical Laboratory, Nagoya University Hospital, Nagoya, Japan
| | - T Matsushita
- Department of Transfusion Medicine, Nagoya University Hospital, Nagoya, Japan.,Department of Clinical Laboratory, Nagoya University Hospital, Nagoya, Japan
| | - T Kojima
- Department of Pathophysiological Laboratory Science, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Tone T, Fujisawa N, Seki Y, Iida H, Tachikawa K, Sugihara M, Minato A, Nishio S, Yamamoto T, Kitamura K, Ueda K, Saito S, Shimada R, Matsuda Y, Naruse Y, Shimamoto S, Tamura S, Yoshikawa M, Tomabechi K. Conceptual Design of Fusion Experimental Reactor(FER). ACTA ACUST UNITED AC 2017. [DOI: 10.13182/fst83-a22924] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Tone
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - N. Fujisawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Seki
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - H. Iida
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Tachikawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - M. Sugihara
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - A. Minato
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Nishio
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - T. Yamamoto
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Kitamura
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Ueda
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Saito
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - R. Shimada
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Matsuda
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - Y. Naruse
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Shimamoto
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - S. Tamura
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - M. Yoshikawa
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
| | - K. Tomabechi
- Japan Atomic Energy Research Institute Naka-machi, Naka-gun, Ibaraki-ken, Japan (02929) 5-3111
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Tsujihara T, Zhou DY, Suzuki T, Tamura S, Kawano T. Helically Chiral 1-Sulfur-Functionalized [6]Helicene: Synthesis, Optical Resolution, and Functionalization. Org Lett 2017; 19:3311-3314. [DOI: 10.1021/acs.orglett.7b01470] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tetsuya Tsujihara
- Department
of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Da-Yang Zhou
- Comprehensive
Analysis Center, Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki 567-0047, Japan
| | - Takeyuki Suzuki
- Comprehensive
Analysis Center, Institute of Scientific and Industrial Research, Osaka University, Mihogaoka, Ibaraki 567-0047, Japan
| | - Satoru Tamura
- Department
of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Tomikazu Kawano
- Department
of Medicinal and Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
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Inagaki S, Nakazato M, Fukuda N, Tamura S, Kawano T. Synthesis of 4-Halo-3(2H)-furanones Using Intramolecular Cyclization of Sulfonium Salts. J Org Chem 2017; 82:5583-5589. [DOI: 10.1021/acs.joc.7b00399] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sho Inagaki
- Department of Medicinal
and
Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Maiko Nakazato
- Department of Medicinal
and
Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Nozomi Fukuda
- Department of Medicinal
and
Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Satoru Tamura
- Department of Medicinal
and
Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
| | - Tomikazu Kawano
- Department of Medicinal
and
Organic Chemistry, School of Pharmacy, Iwate Medical University, Yahaba, Iwate 028-3694, Japan
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Shinohara N, Sunagawa N, Tamura S, Yokoyama R, Ueda M, Igarashi K, Nishitani K. The plant cell-wall enzyme AtXTH3 catalyses covalent cross-linking between cellulose and cello-oligosaccharide. Sci Rep 2017; 7:46099. [PMID: 28443615 PMCID: PMC5405413 DOI: 10.1038/srep46099] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Accepted: 03/02/2017] [Indexed: 11/09/2022] Open
Abstract
Cellulose is an economically important material, but routes of its industrial processing have not been fully explored. The plant cell wall - the major source of cellulose - harbours enzymes of the xyloglucan endotransglucosylase/hydrolase (XTH) family. This class of enzymes is unique in that it is capable of elongating polysaccharide chains without the requirement for activated nucleotide sugars (e.g., UDP-glucose) and in seamlessly splitting and reconnecting chains of xyloglucan, a naturally occurring soluble analogue of cellulose. Here, we show that a recombinant version of AtXTH3, a thus far uncharacterized member of the Arabidopsis XTH family, catalysed the transglycosylation between cellulose and cello-oligosaccharide, between cellulose and xyloglucan-oligosaccharide, and between xyloglucan and xyloglucan-oligosaccharide, with the highest reaction rate observed for the latter reaction. In addition, this enzyme formed cellulose-like insoluble material from a soluble cello-oligosaccharide in the absence of additional substrates. This newly found activity (designated "cellulose endotransglucosylase," or CET) can potentially be involved in the formation of covalent linkages between cellulose microfibrils in the plant cell wall. It can also comprise a new route of industrial cellulose functionalization.
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Affiliation(s)
- Naoki Shinohara
- Plant Cell Wall Biology Laboratory, Graduate School of Life Sciences, Tohoku University, Aoba-Ku, Sendai, 980-8578, Japan
| | - Naoki Sunagawa
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-Ku, Tokyo, 113-8657, Japan
| | - Satoru Tamura
- Laboratory of Organic Chemistry, Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-Ku, Sendai 980-8578, Japan
| | - Ryusuke Yokoyama
- Plant Cell Wall Biology Laboratory, Graduate School of Life Sciences, Tohoku University, Aoba-Ku, Sendai, 980-8578, Japan
| | - Minoru Ueda
- Laboratory of Organic Chemistry, Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-Ku, Sendai 980-8578, Japan
| | - Kiyohiko Igarashi
- Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-Ku, Tokyo, 113-8657, Japan.,VTT Technical Research Centre of Finland, P.O. Box 1000, Tietotie 2, Espoo FI-02044, Finland
| | - Kazuhiko Nishitani
- Plant Cell Wall Biology Laboratory, Graduate School of Life Sciences, Tohoku University, Aoba-Ku, Sendai, 980-8578, Japan
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Shirai T, Inoue O, Tamura S, Tsukiji N, Sasaki T, Endo H, Satoh K, Osada M, Sato-Uchida H, Fujii H, Ozaki Y, Suzuki-Inoue K. C-type lectin-like receptor 2 promotes hematogenous tumor metastasis and prothrombotic state in tumor-bearing mice. J Thromb Haemost 2017; 15:513-525. [PMID: 28028907 DOI: 10.1111/jth.13604] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Indexed: 01/01/2023]
Abstract
Essentials The role of C-type lectin-like receptor-2 (CLEC-2) in cancer progression is unclear. CLEC-2-depleted mouse model is generated by using a rat anti-mouse CLEC-2 monoclonal antibody. CLEC-2 depletion inhibits hematogenous tumor metastasis of podoplanin-expressing B16F10 cells. CLEC-2 depletion prolongs cancer survival by suppressing thrombosis and inflammation. SUMMARY Background C-type lectin-like receptor 2 (CLEC-2) is a platelet activation receptor of sialoglycoprotein podoplanin, which is expressed on the surface of certain types of tumor cells. CLEC-2-podoplanin interactions facilitate hematogenous tumor metastasis. However, direct evidence of the role of CLEC-2 in hematogenous metastasis and cancer progression is lacking. Objective and methods We generated immunological CLEC-2-depleted mice by using anti-mouse CLEC-2 monoclonal antibody 2A2B10 and investigated whether CLEC-2 promoted hematogenous tumor metastasis and tumor growth and exacerbated the prognosis of mice bearing podoplanin-expressing B16F10 melanoma cells. Results Our results showed that hematogenous metastasis was significantly inhibited in CLEC-2-depleted mice. B16F10 cells co-cultured with wild-type platelets, but not with CLEC-2-deficient platelets, showed increased proliferation. However, B16F10 cell proliferation was not inhibited in CLEC-2-depleted mice. Histological analysis showed that thrombus formation in tumor vessels was significantly inhibited and functional vessel density was significantly increased in CLEC-2-depleted mice. These data suggest that CLEC-2 deficiency may inhibit thrombus formation in tumor vessels and increase the density of functional vessels, thus improving oxygen and nutrient supply to tumors, indirectly promoting tumor proliferation. Furthermore, the overall survival of CLEC-2-depleted mice was significantly prolonged, which may be due to the suppression of thrombus formation in the lungs and subsequent inhibition of systemic inflammation and cachexia. Conclusions These data provide a rationale for the targeted inhibition of CLEC-2 as a new strategy for preventing hematogenous tumor metastasis and for inhibiting cancer-related thromboembolism.
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Affiliation(s)
- T Shirai
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - O Inoue
- Infection Control Office, Yamanashi University Hospital, Yamanashi, Japan
| | - S Tamura
- Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - N Tsukiji
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - T Sasaki
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - H Endo
- Department of Food Science and Nutrition, School of Human Cultures, University of Shiga Prefecture, Shiga, Japan
| | - K Satoh
- Division of Laboratory Medicine, Yamanashi University Hospital, Yamanashi, Japan
| | - M Osada
- Division of Laboratory Medicine, Yamanashi University Hospital, Yamanashi, Japan
- School of Medical Technology, Faculty of Health Science, Gumma Paz College, Takasaki, Japan
| | - H Sato-Uchida
- Department of Clinical Nursing, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - H Fujii
- First Department of Surgery, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Y Ozaki
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - K Suzuki-Inoue
- Department of Clinical and Laboratory Medicine, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
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Ito K, Akamatsu N, Togashi J, Tamura S, Sakamoto Y, Hasegawa K, Kokudo N. Outflow Reconstruction Using Cryopreserved Homologous Venous Grafts in Living Donor Liver Transplantation. Transplant Proc 2017; 49:109-114. [DOI: 10.1016/j.transproceed.2016.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Yamasaki M, Yasuda T, Yano M, Hirao M, Kobayashi K, Fujitani K, Tamura S, Kimura Y, Miyata H, Motoori M, Shiraishi O, Makino T, Satoh T, Mori M, Doki Y. Multicenter randomized phase II study of cisplatin and fluorouracil plus docetaxel (DCF) compared with cisplatin and fluorouracil plus Adriamycin (ACF) as preoperative chemotherapy for resectable esophageal squamous cell carcinoma (OGSG1003). Ann Oncol 2017; 28:116-120. [PMID: 27687307 DOI: 10.1093/annonc/mdw439] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND This phase II trial evaluated the efficacy of cisplatin and fluorouracil (CF)-based combination neoadjuvant chemotherapy on the outcome of patients with resectable locally advanced esophageal squamous cell carcinoma (ESCC). We compared the recurrence-free survival (RFS) associated with CF plus Adriamycin (ACF) with that associated with CF plus docetaxel (DCF) to select an alternative regimen in a new phase III trial investigating the optimal neoadjuvant treatment of patients with ESCC. PATIENTS AND METHODS Patients with resectable advanced ESCC were randomly assigned to either ACF (Adriamycin 35 mg/m2, cisplatin 70 mg/m2 i.v. on day 1, fluorouracil 700 mg/m2 continuous infusion for 7 days) every 4 weeks or DCF (docetaxel 70 mg/m2, cisplatin 70 mg/m2 i.v. on day 1, fluorouracil 700 mg/m2 continuous infusion for 5 days) every 3 weeks. Surgery was scheduled after completion of two cycles of chemotherapy. The primary end point was RFS, analyzed by the intention-to-treat. RESULTS Between October 2011 and October 2013, 162 patients at 10 institutions were enrolled in the study, all of whom were eligible and randomly assigned to the two groups (81 to the ACF group and 81 to the DCF group). The R0 resection rates for the ACF and DCF groups were equivalent (95.9% versus 96.2%, P = 0.93). The 2-year RFS and overall survival rates for DCF versus ACF were 64.1% versus 42.9% (hazard ratio 0.53, 95% confidence interval 0.33-0.83, P = 0.0057) and 78.6% versus 65.4% (P = 0.08), respectively. CONCLUSION Compared with ACF, DCF chemotherapy was associated with prolonged RFS for patients with resectable advanced ESCC. Thus, DCF chemotherapy has potential as a standard neoadjuvant therapy for resectable ESCC. CLINICAL TRIAL REGISTRATION University Hospital Medical Information Network Clinical Trials Registry of Japan (identification number UMIN000004555/000004616).
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Affiliation(s)
- M Yamasaki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka
| | - T Yasuda
- Department of Surgery, Kinki University School of Medicine, Osaka Sayama, Osaka
| | - M Yano
- Department of Surgery, Osaka Medical Center for Cancer and Cardiovascular Disease, Osaka
| | - M Hirao
- Department of Surgery, National Hospital Organization, Osaka National Hospital, Osaka
| | - K Kobayashi
- Department of Surgery, Kinki Central Hospital of the Mutual Aid Association of Public School Teachers, Hyogo
| | - K Fujitani
- Department of Surgery, Osaka General Medical Center, Osaka
| | - S Tamura
- Department of Surgery, Kansai Rosai Hospital, Hyogo
| | - Y Kimura
- Department of Gastroenterological Surgery, Nippon Telegraph and Telephone Public Corporation West Osaka Hospital, Osaka
| | - H Miyata
- Department of Surgery, Osaka Medical Center for Cancer and Cardiovascular Disease, Osaka
| | - M Motoori
- Department of Surgery, Osaka General Medical Center, Osaka
| | - O Shiraishi
- Department of Surgery, Kinki University School of Medicine, Osaka Sayama, Osaka
| | - T Makino
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka
| | - T Satoh
- Department of Frontier Science for Cancer and Chemotherapy, Osaka University Graduate School of Medicine, Osaka, Japan
| | - M Mori
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka
| | - Y Doki
- Department of Gastroenterological Surgery, Graduate School of Medicine, Osaka University, Suita, Osaka
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Maeda H, Okamoto K, Maehara H, Namikawa T, Tamura S, Hiroi M, Hanazaki K, Kobayashi M. Laparoscopic resection of villous adenoma of the appendix. ACRT 2017. [DOI: 10.4993/acrt.25.44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | - Ken Okamoto
- Cancer Treatment Center, Kochi Medical School Hospital
| | | | | | | | - Makoto Hiroi
- Department of diagnostic pathology, Kochi Medical School, Kochi University
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Tamura S, Taniguchi H, Takeno A, Murakami K, Katsura Y, Ohmura Y, Naito A, Kagawa Y, Takeda Y, Kato T. A randomized phase II study of pancrelipase in patients with gastrectomy to assess the prevention of weight loss. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw371.46] [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: 11/14/2022] Open
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Tamura S, Yu Y, Nakagawa T, Nagasaka R, Tsunoda T, Ogawa K, Tori M, Koike T, Shiomi M. A novel compound (D-47), the hypolipidemic effects and the mechanism in an animal model of hypercholesterolemia (WHHLMI rabbit). Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.429] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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46
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Nishikawa K, Fujitani K, Inagaki H, Akamaru Y, Tokunaga S, Takagi M, Tamura S, Sugimoto N, Shigematsu T, Yoshikawa T, Ishiguro T, Nakamura M, Yamane T, Yamada M, Imano M, Iijima S, Nashimoto A, Morita S, Miyashita Y, Tsuburaya A, Sakamoto J, Tsujinaka T. PD-035 Efficacy and safety of second-line irinotecan based chemotherapy in early relapse patients with gastric cancer after adjuvant chemotherapy: exploratory subgroup analysis of TRICS trial. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw200.35] [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: 11/14/2022] Open
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47
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Mitsui Y, Kagemoto K, Itagaki T, Inoue S, Yamasaki S, Naruse K, Tamura S, Muguruma N, Takayama T. [Duodenal gastrointestinal stromal tumor (GIST) with deletion in exon 11 of c-kit treated with emergency pancreaticoduodenectomy due to massive bleeding: a case report]. Nihon Shokakibyo Gakkai Zasshi 2015; 112:690-8. [PMID: 25843457 DOI: 10.11405/nisshoshi.112.690] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A Japanese woman in her 50s presented with coffee-ground vomiting at a local clinic and was referred to our hospital for further investigation. Esophagogastroduodenoscopy demonstrated a submucosal tumor in the descending part of the duodenum, and she was diagnosed with a gastrointestinal stromal tumor (GIST) by other imaging studies. Elective surgery of the tumor was initially planned. However, on the 13th day of hospitalization, emergency pancreaticoduodenectomy was performed because of massive hematemesis with hemorrhagic shock. Genetic analysis demonstrated a deletion in exon 11 of the c-kit gene, which could dramatically alter the clinical course. Although duodenal GIST with active bleeding is comparatively rare, we have to assume that it is the cause of gastrointestinal bleeding and treat such cases with a minimally invasive surgical procedure and neoadjuvant/adjuvant chemotherapy. It is necessary to accumulate more cases with duodenal GIST to establish an evidence-based therapeutic strategy.
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Affiliation(s)
- Yasuhiro Mitsui
- Department of Gastroenterology, National Hospital Organization Kochi National Hospital
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48
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Shirakawa T, Nakano M, Nio K, Tamura S, Kumagai H, Komoda M, Uchino K, Arita S, Ariyama H, Shibata Y, Kusaba H, Akashi K, Baba E. 520P Retrospective analysis of cardiovascular diseases in chemotherapies for advanced solid tumor patients in a single institution. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv535.15] [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: 11/12/2022] Open
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49
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Moritani N, Matsumura T, Yamachika E, Goda Y, Uemura A, Nakata N, Tamura S, Yoshioka Y, Iida S. A novel guide device of the osteotomy line for intraoral vertical ramus osteotomy. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.248] [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: 11/28/2022]
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50
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Tamura S, Takeno A, Murakami K, Naito A, Katsura Y, Ohmura Y, Kagawa Y, Okishiro M, Egawa C, Takeda Y, Kato T. 2232 Results of the preoperative diagnosis by staging laparoscopy and the surgical intervention following chemotherapy for patients with peritoneal dissemination due to gastric cancer. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31148-0] [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: 10/22/2022]
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