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Takemura H, Choi JH, Fushimi K, Narikawa R, Wu J, Kondo M, Nelson DC, Suzuki T, Ouchi H, Inai M, Hirai H, Kawagishi H. Role of hypoxanthine-guanine phosphoribosyltransferase in the metabolism of fairy chemicals in rice. Org Biomol Chem 2023; 21:2556-2561. [PMID: 36880328 DOI: 10.1039/d3ob00026e] [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: 03/08/2023]
Abstract
Fairy chemicals (FCs), 2-azahypoxanthine (AHX), imidazole-4-carboxamide (ICA), and 2-aza-8-oxohypoxanthine (AOH), are molecules with many diverse functions in plants. The defined biosynthetic pathway for FCs is a novel purine metabolism in which they are biosynthesized from 5-aminoimidazole-4-carboxamide. Here, we show that one of the purine salvage enzymes, hypoxanthine-guanine phosphoribosyltransferase (HGPRT), recognizes AHX and AOH as substrates. Two novel compounds, AOH ribonucleotide and its ribonucleoside which are the derivatives of AOH, were enzymatically synthesized. The structures were determined by mass spectrometry, 1D and 2D NMR spectroscopy, and X-ray single-crystal diffraction analysis. This report demonstrates the function of HGPRT and the existence of novel purine metabolism associated with the biosynthesis of FCs in rice.
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Affiliation(s)
- Hirohide Takemura
- Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Research Fellow of Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | - Jae-Hoon Choi
- Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Keiji Fushimi
- Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Rei Narikawa
- Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Jing Wu
- Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Mitsuru Kondo
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - David C Nelson
- Department of Botany and Plant Sciences, University of California, Riverside, California 92521, USA
| | - Tomohiro Suzuki
- Center for Bioscience Research and Education, Utsunomiya University, 350 Minemachi, Tochigi 321-8505, Japan
| | - Hitoshi Ouchi
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Makoto Inai
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Hirofumi Hirai
- Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Hirokazu Kawagishi
- Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
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Kobori H, Wu J, Takemura H, Choi JH, Tada N, Kawagishi H. Utilization of Corn Steep Liquor for the Production of Fairy Chemicals by Lepista sordida Mycelia. J Fungi (Basel) 2022; 8:jof8121269. [PMID: 36547602 PMCID: PMC9783885 DOI: 10.3390/jof8121269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/30/2022] [Accepted: 11/30/2022] [Indexed: 12/04/2022] Open
Abstract
There are various potential practical uses of fairy chemicals (FCs) in the fields of agriculture, cosmetics, and medicine; however, the production costs of FCs are very high. To enable the practical use of FCs, more efficient and inexpensive methods of culturing the mycelia of FCs-producing fungi and producing FCs need to be developed. The purpose of the present study was to determine methods of reducing the production costs of FCs and mycelia of the FCs-producing fungus Lepista sordida. We investigated the effects of four food industrial by-products, i.e., corn steep liquor (CSL), rice bran, wheat bran, and Japanese liquor lees, as nutritional additives in the liquid culture medium of the fungus. We found that CSL was more effective than the other tested additives in increasing the production of FCs and mycelia. Medium containing 1% CSL was optimal for increasing the mycelial yield while medium containing 6% CSL was optimal for increasing the production of FCs. The reason for this difference in the optimal CSL concentration was considered to be related to the stress on the mycelia caused by the amount of nutrients in the liquid medium. These results are expected to facilitate the practical use of FCs and the mycelia of FCs-producing fungi.
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Affiliation(s)
- Hajime Kobori
- Iwade Research Institute of Mycology Co., Ltd., 1-9 Suehiro, Tsu 514-0012, Japan
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Correspondence: (H.K.); (H.K.)
| | - Jing Wu
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Hirohide Takemura
- Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Jae-Hoon Choi
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Research Institute of Green Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Naoto Tada
- Iwade Research Institute of Mycology Co., Ltd., 1-9 Suehiro, Tsu 514-0012, Japan
| | - Hirokazu Kawagishi
- Research Institute for Mushroom Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Faculty of Agriculture, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
- Correspondence: (H.K.); (H.K.)
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Inoue O, Usui S, Goten C, Hashimuko D, Yamaguchi K, Takeda Y, Nomura A, Ootsuji H, Takashima S, Iino K, Takemura H, Sanchez-Gurmaches J, Takamura M. Single-cell transcriptomics reveals an angiogenic cell population for therapeutic angiogenesis in adipose tissue. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.3089] [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: 11/13/2022] Open
Abstract
Abstract
Background
Therapeutic angiogenesis mediated by stem/progenitor cells is an attractive therapeutic option against cardiovascular disease (CVD). Adipose tissue (AT) can be safely obtained even in CVD patients with anti-platelet medications, and it is a readily available source of culture-expanded adipose-derived stem cells (ADSCs) for transplantation. Single-cell transcriptome enables us to screen all the surface markers at once, while conventional strategies have been limited for the number of target markers. Furthermore, gene profiling at single-cell resolution can be used for the quantification of each marker by how many favorable cells can be purified without mixing of detrimental cells.
Purpose
We aimed to identify and characterize a cell population with in vivo angiogenic potential by single-cell RNA sequencing (scRNA-seq) analysis and xenograft experiments.
Methods
We revisited scRNA-seq datasets of single cell fraction from AT, bone-marrow (BM), and umbilical-cord blood (UCB, n=6/organ) to find cell populations with pro-angiogenic potential. Next, we collected AT from CVD patients (n=23) and used multicolor flow cytometry to quantify and sort the specific populations. PBS, the specific marker-negative and unsorted ADSCs were used as controls. Xenograft models of PKH26 pre-labeled human ADSC transplantation in limb ischemia were used to evaluate the lectin capillary density, PKH+ engrafted ADSCs, and blood flow recovery.
Results
Clustering divided CD45–CD31–CD34+ progenitor fraction into 3 clusters. We identified pro-/anti-angiogenic clusters based on the expressions of well-known pro-/anti-angiogenic factors. All genes encoding cell-surface proteins were compared in this functional clustering, resulted in 17 markers screened (Fig. 1A, B). Taken together with enrichment analysis, CD271+ cells showed predominant and pro-angiogenic gene profile from the other top candidates including CD36 and CD54 (Fig. 1C, D). Next, we evaluated the number and gene profile of CD271+ cells in well-known stem cell sources including BM and UCB. Surprisingly, the number of CD271 expressing cells were significantly lower and did not show angiogenic gene profile in BM and UCB (Fig. 2A). In analysis of AT from 23 CVD patients, CD271+ cells were significantly decreased by donor insulin resistance (Fig. 2B). Cell therapy using CD271+ ADSCs demonstrated in vivo angiogenic capacity compared to those of CD271– ADSCs and PBS in limb ischemia model. Furthermore, CD271+ ADSC transplantation showed enhanced efficacy compared to unsorted ADSCs from the same donors (Fig. 2C–E).
Conclusion
In this study, we identified CD271+ cell population in AT as an angiogenic cell population through scRNA-seq analysis and cell therapy experiments. AT obtained from donors without insulin resistance would be the most suitable for CD271+ ADSC isolation. CD271+ ADSC transplantation with a promising angiogenic capacity could contribute better cell-based therapy tackling CVD.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Japan Society for the Promotion of Science (JSPS) KAKENHI (Tokyo, Japan)
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Affiliation(s)
- O Inoue
- Cincinnati Children's Hospital Medical Center, Developmental Biology , Cincinnati , United States of America
| | - S Usui
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - C Goten
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - D Hashimuko
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - K Yamaguchi
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - Y Takeda
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - A Nomura
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - H Ootsuji
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - S Takashima
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
| | - K Iino
- Kanazawa University, Department of Cardiovascular Surgery , Kanazawa , Japan
| | - H Takemura
- Kanazawa University, Department of Cardiovascular Surgery , Kanazawa , Japan
| | - J Sanchez-Gurmaches
- Cincinnati Children's Hospital Medical Center, Developmental Biology , Cincinnati , United States of America
| | - M Takamura
- Kanazawa University, Department of Cardiology , Kanazawa , Japan
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Takago S, Matsumoto I, Kato H, Saito N, Ueda H, Iino K, Kimura K, Takemura H. Hypothermic preservation of rat hearts using antifreeze glycoprotein. Physiol Res 2020; 69:1029-1038. [PMID: 33251809 DOI: 10.33549/physiolres.934473] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Antifreeze proteins are an effective additive for low-temperature preservation of solid organs. Here, we compared static hypothermic preservation with and without antifreeze glycoprotein (AFGP), followed by nonfreezing cryopreservation of rat hearts. The heart was surgically extracted and immersed in one of the cardioplegia solutions after cardiac arrest. Control rat hearts (n=6) were immersed in University of Wisconsin (UW) solution whereas AFGP-treated hearts (AFGP group) (n=6) were immersed in UW solution containing 500 ?g/ml AFGP. After static hypothermic preservation, a Langendorff apparatus was used to reperfuse the coronary arteries with oxygenated Krebs-Henseleit solution. After 30, 60, 90, and 120 min, the heart rate (HR), coronary flow (CF), cardiac contractile force (max dP/dt), and cardiac diastolic force (min dP/dt) were measured. Tissue water content (TWC) and tissue adenosine triphosphate (ATP) levels in the reperfused preserved hearts were also assessed. All the parameters were compared between the control and AFGP groups. Compared with the control group, the AFGP group had significantly (p<0.05) higher values of the following parameters: HR at 60, 90, and 120 min; CF at all four time points; max dP/dt at 90 min; min dP/dt at 90 and 120 min; and tissue ATP levels at 120 min. TWC did not differ significantly between the groups. The higher HR, CF, max dP/dt, min dP/dt, and tissue ATP levels in the AFGP compared with those in control hearts suggested that AFGP conferred superior hemodynamic and metabolic functions. Thus, AFGP might be a useful additive for the static/nonfreezing hypothermic preservation of hearts.
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Affiliation(s)
- S Takago
- Department of Cardiovascular Surgery, Kanazawa University, Kanazawa, Ishikawa, Japan.
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Ito A, Choi JH, Takemura H, Kotajima M, Wu J, Tokuyama S, Hirai H, Asakawa T, Ouchi H, Inai M, Kan T, Kawagishi H. Biosynthesis of the Fairy Chemicals, 2-Azahypoxanthine and Imidazole-4-carboxamide, in the Fairy Ring-Forming Fungus Lepista sordida. J Nat Prod 2020; 83:2469-2476. [PMID: 32786881 DOI: 10.1021/acs.jnatprod.0c00394] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Fairy rings resulting from a fungus-plant interaction appear worldwide. 2-Azahypoxanthine (AHX) and imidazole-4-carboxamide (ICA) were first isolated from the culture broth of one of the fairy ring-forming fungi, Lepista sordida. Afterward, a common metabolite of AHX in plants, 2-aza-8-oxohypoxanthine (AOH), was found in AHX-treated rice. The biosynthetic pathway of the three compounds that are named as fairy chemicals (FCs) in plants has been partially elucidated; however, that in mushrooms remains unknown. In this study, it was revealed that the carbon skeletons of AHX and ICA were constructed from Gly in L. sordida mycelia and the fungus metabolized 5-aminoimidazole-4-carboxamide (AICA) to both of the compounds. These results indicated that FCs were biosynthesized by a diversion of the purine metabolic pathway in L. sordida mycelia, similar to that in plants. Furthermore, we showed that recombinant adenine phosphoribosyltransferase (APRT) catalyzed reversible interconversion not only between 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranosyl 5'-monophosphate (AICAR) and AICA but also between ICA-ribotide (ICAR) and ICA. Furthermore, the presence of ICAR in L. sordida mycelia was proven for the first time by LC-MS/MS detection, and this study provided the first report that there was a novel metabolic pathway of ICA in which its ribotide was an intermediate in the fungus.
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Affiliation(s)
- Akinobu Ito
- Research Fellow of Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | | | - Hirohide Takemura
- Research Fellow of Japan Society for the Promotion of Science, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan
| | | | | | | | | | - Tomohiro Asakawa
- Marine Science and Technology, Tokai University, 4-1-1 Kitakaname, Hiratsuka City, Kanagawa 259-1292, Japan
| | - Hitoshi Ouchi
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Makoto Inai
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Toshiyuki Kan
- Department of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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Inoue O, Usui S, Nomura A, Yamaguchi K, Goten C, Hamaoka T, Ootsuji H, Takashima S, Murai H, Iino K, Takemura H, Takamura M. P3495Long-term engraftment of human CD271-positive adipose-derived stem cells with pericytic and less-aged gene profile in a mouse model of hindlimb ischemia. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0362] [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
Therapeutic angiogenesis using adipose-derived stem cells (ADSCs) is an attractive strategy for ischemic cardiovascular diseases. We previously reported that human CD271+ population of adipose-derived stem cells (ADSCs) promoted neovascularization with enhanced engraftment in a mouse model of hindlimb ischemia. However, whether and how CD271+ ADSCs promote the long-term engraftment is still uncertain.
Purpose
We aimed to examine whether the angiogenic effect and cell engraftment capacity of CD271+ ADSCs would be sustained in long-term period. Then, comparative gene profiling between CD271+ and CD271- ADSCs were analyzed. Finally, cell proliferation and endothelial differentiation assays were conducted.
Methods
ADSCs were isolated from subcutaneous adipose tissue of 5 patients received cardiovascular surgery. CD271+ and CD271- ADSCs were sorted from CD45-CD31-CD34+ ADSCs fraction by FACS sorting (Fig. A). Cultured CD271+ and CD271- ADSCs at passage 6 were labeled by PKH26 cell linker dye and used for xenograft experiments. Briefly, athymic nude mice were subjected to hindlimb ischemia and one million of human ADSCs were injected into the ischemic muscles. In control group, PBS was solely injected. At 2 and 5 weeks, neovascularization was evaluated by immunohistochemistry (capillary density using lectin perfusion). Cell engraftment was assessed by counting PKH26-positive cells. Furthermore, we compared gene profiling between CD271+ and CD271- ADSCs by microarray. Proliferative capacity was evaluated by colony-forming unit (CFU) assay with Giemsa staining. In endothelial differentiation assay, CD271+ and CD271- ADSCs were cultured in differentiation induction medium containing vascular endothelial growth factor for 2 weeks and stained with anti-human CD31 antibody.
Results
Cell therapy using CD271+ ADSCs demonstrated approximately 3-fold more enhanced neovascularization than those using CD271- ADSCs or PBS in histological analysis of capillary density at 2 weeks from cell therapy (Fig. B and C). At 5 weeks, mice treated with CD271+ ADSCs were significantly rescued from limb ischemia and this was accompanied by sustained engraftment of ADSCs (Fig. D). In microarray analysis, the differentially expressed 2167 genes were extracted to classify CD271+ and CD271- ADSCs. Pathway analysis demonstrated CD271 expression on ADSCs was associated with the pathways related to stemness and cell differentiation. Indeed, we found that genes related to cell proliferation (PI3K, Cyclin D, and Cyclin D2) were up-regulated in CD271+ ADSCs. Additionally, we found the pericytic marker nestin which was significantly up-regulated in CD271+ ADSCs. Consistent with these findings, CD271+ ADSCs were more proliferative and capable for endothelial differentiation while CD271- ADSCs were not.
FACS and cell therapy experiments
Conclusion
These results suggest that CD271+ ADSCs possess long-term engraftment and angiogenic capacity due to their less-aged and more pericytic gene profile.
Acknowledgement/Funding
Japan Society for the Promotion of Science (JSPS) KAKENHI (Tokyo, Japan) Grant Number JP16H06828
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Affiliation(s)
- O Inoue
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - S Usui
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - A Nomura
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - K Yamaguchi
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - C Goten
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - T Hamaoka
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - H Ootsuji
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - S Takashima
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - H Murai
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
| | - K Iino
- Kanazawa University, Department of Cardiovascular Surgery, Kanazawa, Japan
| | - H Takemura
- Kanazawa University, Department of Cardiovascular Surgery, Kanazawa, Japan
| | - M Takamura
- Kanazawa University, Department of Cardiology, Kanazawa, Japan
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Choi JH, Wu J, Sawada A, Takeda S, Takemura H, Yogosawa K, Hirai H, Kondo M, Sugimoto K, Asakawa T, Inai M, Kan T, Kawagishi H. N-Glucosides of Fairy Chemicals, 2-Azahypoxanthine and 2-Aza-8-oxohypoxanthine, in Rice. Org Lett 2017; 20:312-314. [PMID: 29235343 DOI: 10.1021/acs.orglett.7b03736] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Plant growth stimulators, 2-azahypoxanthine (AHX) and 2-aza-8-oxohypoxanthine (AOH), were isolated from the fairy-ring-forming fungus, Lepista sordida, and AHX-treated rice, respectively. Further metabolites of AHX were detected in AHX-treated rice by HPLC, and the metabolites 1-4 were isolated from the rice. The structures of 1-4 were determined by spectroscopic analysis and synthesis. Compounds 1-4 exhibited no significant activity against rice, indicating that rice regulates the activity of AHX and AOH by converting them into their glucosides.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Kunihisa Sugimoto
- Research & Utilization Division, Japan Synchrotron Radiation Research Institute , 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - Tomohiro Asakawa
- Tokai University Institute of Innovative Science and Technology , 4-1-1 Kitakaname, Hiratsuka City, Kanagawa 259-1292, Japan
| | - Makoto Inai
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Toshiyuki Kan
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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Inoue O, Usui S, Nomura A, Goten C, Hamaoka T, Ootsuji H, Takashima S, Kato T, Murai H, Furusho H, Iino K, Takemura H, Kaneko S, Takamura M. P2555Identification of the angiogenic subset of human adipose-derived stem cells by evaluation of capability to induce M2-dominant macrophage polarization in cell therapy. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2555] [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: 11/14/2022] Open
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9
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Iwata H, Shirahashi K, Yamamoto H, Takemura H. F-141PROPENSITY SCORE MATCHING ANALYSIS OF HYBRID VIDEO-ASSISTED THORACOSCOPIC SURGERY AND THORACOSCOPIC LOBECTOMY FOR CLINICAL STAGE I LUNG CANCER. Interact Cardiovasc Thorac Surg 2015. [DOI: 10.1093/icvts/ivv204.141] [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: 11/15/2022] Open
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10
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Pestilli F, Yeatman J, Rokem A, Kay K, Takemura H, Wandell B. LiFE: Linear Fascicle Evaluation a new technology to study visual connectomes. J Vis 2014. [DOI: 10.1167/14.10.1122] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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11
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Takemura H, Wandell B. A major white-matter wiring between the ventral and dorsal stream. J Vis 2014. [DOI: 10.1167/14.10.1465] [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] Open
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12
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Adachi Y, Tsutsumi A, Murata H, Takemura H, Chino Y, Takahashi R, Ebitsuka T, Sumida T. Behçet's disease accompanied by myelodysplastic syndrome with trisomy 8: two case reports and a review of 15 Japanese cases. Mod Rheumatol 2014; 13:90-4. [PMID: 24387124 DOI: 10.3109/s101650300015] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract We describe two cases of Behçet's disease associated with myelodysplastic syndrome (MDS) with trisomy 8. Both cases developed ulceration in the cecum as a gastrointestinal complication of Behçet's disease, after a diagnosis of MDS. We summarized recent case reports of Behçet's disease associated with myelodysplastic syndrome, and studied the clinical manifestations. Most cases showed trisomy 8 as a chromosomal abnormality. Gastrointestinal involvement without eye lesions seems to be characteristic of Behçet's disease associated with MDS.
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Affiliation(s)
- Y Adachi
- Division of Rheumatology, Department of Internal Medicine, Institute of Clinical Medicine, University of Tsukuba , 1-1-1 Tennodai, Tsukuba 305-8575 , Japan
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Iwata H, Shirahashi K, Mizuno Y, Matsui M, Takemura H. 085 * THE FEASIBILITY OF SEGMENTAL RESECTION IN LUNG CANCER WITH GROUND GLASS OPACITY. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.85] [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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14
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Mizuno Y, Iwata H, Shirahashi K, Matsui M, Takemura H. Persistent spontaneous pneumothorax for four years: a case report. Prague Med Rep 2012; 113:303-208. [PMID: 23249663 DOI: 10.14712/23362936.2015.15] [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: 10/23/2022] Open
Abstract
Pneumothorax, defined as the presence of air in the pleural space, is usually classified as spontaneous or traumatic; it is unusual for pneumothorax to be categorized as being acute or chronic. Even if conservative treatment is chosen, the pneumothorax is cured when air in the pleural space dissolves into the venous blood. A 50-years-old Japanese man with no prior medical history was referred to our department with a right pneumothorax and two rightsided pulmonary nodules on chest X-ray and CT. The chest radiographs of past mass screening which was taken four years ago showed right pneumothorax and right-sided pulmonary nodules. From then, all chest radiograph and chest computed tomography showed right pneumothorax and pulmonary nodules. But he underwent no medical interventions. We designed to perform an operation for a treatment of right pneumothorax and the diagnosis of pulmonary tumors. We underwent right upper lobectomy and pleural decortication under video assisted thoracic surgery. We obtained pathological diagnosis of inflammatory pseudotumor and surrounding atelectasis. He was cured from pneumothorax and pulmonary tumors. A unique case of spontaneous pneumothorax presenting with a pleural air space that was confirmed by chest radiographs and computed tomography examinations over a 4-year period is reported.
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Affiliation(s)
- Y Mizuno
- Department of General and Cardiothoracic Surgery, Graduate School of Medicine, Gifu University, Gifu, Japan.
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15
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Kubonoya K, Furukawa S, Machida T, Miyakawa T, Hisamatsu M, Sekine K, Takemura H, Sato K. W280 A 30-YEAR CASE STUDY BASED ON 64,528 BREECH PRESENTATIONS; CHANGES IN DELIVERY MODE AND INFANT MORTALITY. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)62003-7] [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: 10/27/2022]
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16
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Takemura H, Ashida H, Amano K, Kitaoka A, Murakami I. Neural correlates of induced motion revealed by fMRI. J Vis 2012. [DOI: 10.1167/12.9.755] [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] Open
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17
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Miyahara T, Umeda Y, Yoshikawa S, Matsuno Y, Iwata H, Takemura H. Selective blockade of apoptosis by in vivo electroporation-mediated gene transfer combined with portal infusion of plasmid DNA attenuates liver cirrhosis. MINERVA CHIR 2012; 67:249-255. [PMID: 22691829] [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: 06/01/2023]
Abstract
AIM The purpose of the present study was to determine whether in vivo electroporation could achieve selective blockade of apoptosis in a rat liver cirrhosis model. METHODS A dimethylnitrosamine (DMN)-induced rat liver cirrhosis model was used. In vivo electroporation was performed after portal vein infusion of plasmid DNA. pFas-Fc plasmid DNA was used to block the apoptotic pathway. pUC/HGF and pCAGGS/EGFP were used as positive and negative controls, respectively. Liver collagen content was evaluated by hydroxyproline assay two weeks after gene transfer. Terminal deoxynucleotidyltransferase dUTP nick end-labeling was simultaneously performed in the liver to evaluate suppression of apoptosis. Survival analysis was performed using 10 rats that received the sFas gene, 10 that received the HGF gene, and 13 that received the GFP gene. RESULTS The apoptotic cell index in the DMN-injected liver was significantly lower in rats that received the sFas gene compared with the negative control. The collagen content of the DMN-injected liver was also lower in rats that received the sFas gene compared with the negative control. There was no significant difference in the apoptotic cell index and collagen content of rats that received the sFas and HGF genes. Ten weeks after the initiation of DMN treatment, the survival rates with the sFas, HGF, and GFP genes were 56%, 100%, and 0, respectively. CONCLUSION Selective blockade of apoptosis by in vivo electroporation-mediated gene transfer improved the apoptotic cell index, hydroxyproline content, and survival rate. Soluble Fas gene therapy using in vivo electroporation can be a safe and efficient therapy for liver cirrhosis in rats.
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Affiliation(s)
- T Miyahara
- Department of General and Cardiothoracic Surgery, Gifu University, Gifu, Japan.
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Mizuno Y, Iwata H, Shirahashi K, Takamochi K, Oh S, Suzuki K, Takemura H. The importance of intraoperative fluid balance for the prevention of postoperative acute exacerbation of idiopathic pulmonary fibrosis after pulmonary resection for primary lung cancer. Eur J Cardiothorac Surg 2012; 41:e161-5. [DOI: 10.1093/ejcts/ezs147] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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19
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Ishida N, Takemura H, Shimabukuro K, Matsuno Y. Normothermic total arch replacement without hypothermic circulatory arrest to treat aortic distal arch aneurysm in a patient with cold agglutinin disease. Interact Cardiovasc Thorac Surg 2011; 13:432-4. [DOI: 10.1510/icvts.2011.275602] [Citation(s) in RCA: 7] [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: 11/06/2022] Open
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20
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Takemura H, Tajima S, Murakami I. Motion integration and segregation modulated by surrounding motion. J Vis 2011. [DOI: 10.1167/11.11.739] [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] Open
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21
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Takemura H, Murakami I. Directional judgment between leftward and rightward motions modulated by angular deviation from the horizontal axis. J Vis 2010. [DOI: 10.1167/10.7.829] [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] Open
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22
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Umeda Y, Fukumoto Y, Miyauchi T, Imaizumi M, Shimabukuro K, Mori Y, Takemura H. [Reconstruction of the left common carotid artery for dissective occlusion detected by intra-operative ultrasonography]. Kyobu Geka 2010; 63:355-357. [PMID: 20446601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We describe a case of Stanford type A acute aortic dissection. Replacement of the ascending aorta and aortic arch was performed using an "arch 1st technique". Following the completion of replacement, hypotension of the left superficial temporal artery pressure was detected. Ultrasonography revealed dissection of the left common carotid artery (LCCA) and compressive occlusion of the true lumen. Reconstruction of the LCCA was performed in the neck. The patient did well after the operation without any neurological abnormalities.
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Affiliation(s)
- Y Umeda
- Department of General and Cardiothoracic Surgery, Gifu University, Gifu, Japan
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Yoshida K, Nasu Y, Shitami N, Toyoda H, Takemura H, Oomori K. A novel convenient method for high bacteriophage titer assay. ACTA ACUST UNITED AC 2009:315-6. [DOI: 10.1093/nass/nrp158] [Citation(s) in RCA: 2] [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: 11/13/2022]
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25
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Murakami E, Iwata H, Imaizumi M, Takemura H. Prevention of arterial graft spasm by botulinum toxin: an in-vitro experiment. Interact Cardiovasc Thorac Surg 2009; 9:395-8. [DOI: 10.1510/icvts.2009.207076] [Citation(s) in RCA: 13] [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: 11/06/2022] Open
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26
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Sugimoto T, Yamada T, Iwata H, Sekino T, Matsumoto S, Ishida N, Manabe H, Kimura M, Takemura H. Two-Stage Portal Vein Ligation Facilitates Liver Regeneration in Rats. Eur Surg Res 2009; 42:181-8. [DOI: 10.1159/000203406] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Accepted: 12/23/2008] [Indexed: 11/19/2022]
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27
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Yamazaki T, Takemura H, Inoue M, Ogawa M, Ando S, Sato K, Kishimoto T. The intracellular accumulation of phagocytic and epithelial cells and the inhibitory effect on Chlamydophila (Chlamydia) pneumoniae of telithromycin and comparator antimicrobials. J Chemother 2008; 20:428-30. [PMID: 18676220 DOI: 10.1179/joc.2008.20.4.428] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
The intracellular accumulation of telithromycin was measured and compared with ciprofloxacin, clarithromycin, minocycline and erythromycin. The activities of telithromycin, clarithromycin and minocycline against Chlamydophila (Chlamydia) pneumoniae were compared in an intracellular killing assay. Maximal telithromycin accumulation (mean intracellular/extracellular concentration ratio) ranged from 6.7 (A549 lung epithelial cells) to 11.8 (THP-1 monocytic cells). This ratio was similar to that of clarithromycin, but less than for minocycline. Minimum inhibitory and minimum lethal telithromycin concentrations against six clinical strains of C. pneumoniae were <0.015-0.03 mg/L and 0.03-0.06 mg/L, respectively, which were lower than those found for minocycline. These results show that telithromycin accumulates rapidly into epithelial cells, similar to previously reported results for phagocytic cells. Intracellular accumulation of telithromycin was lower than that observed for minocycline, but telithromycin demonstrated substantially more potent antichlamydial activity.
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Affiliation(s)
- T Yamazaki
- First Department of Virology, National Institute of Infectious Diseases, Tokyo, Japan.
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28
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Umeda Y, Fukumoto Y, Miyauchi T, Imaizumi M, Shimabukuro K, Mori Y, Takemura H. [Anaphylactic shock related to aprotinin induced by anti-aprotinin immunoglobulin G antibody alone; report of a case]. Kyobu Geka 2007; 60:69-71. [PMID: 17249542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Anaphylactic shock related to aprotinin has been reported to be induced exclusively in the presence of IgE antibody. And the possibility of anaphylactic shock induced by anti-aprotinin IgG antibody alone was controversial. In this paper, we describe the first case of anaphylactic shock induced by aprotinin-specific IgG antibody alone. A 55-year-old man underwent surgical repair of the descending aorta with the use of aprotinin at 2 months after first aprotinin usage. Immediately after initiation of cardiopulmonary bypass with the continuous infusion of aprotinin, clinical symptoms of anaphylactic reaction were found. Postoperative drug lymphocyte stimulation test for aprotinin and aprotinin-specific IgE antibody were negative, but aprotinin-specific IgG antibody was 163 mg/l and positive.
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Affiliation(s)
- Y Umeda
- Advanced Surgery, Department of Organ Pathobiology, Gifu University School of Medicine, Gifu, Japan
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29
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Furuta T, Hayward RL, Meng LH, Takemura H, Aune GJ, Bonner WM, Aladjem MI, Kohn KW, Pommier Y. p21CDKN1A allows the repair of replication-mediated DNA double-strand breaks induced by topoisomerase I and is inactivated by the checkpoint kinase inhibitor 7-hydroxystaurosporine. Oncogene 2006; 25:2839-49. [PMID: 16407843 DOI: 10.1038/sj.onc.1209313] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
This study provides evidence for the importance of p21(CDKN1A) for the repair of replication-mediated DNA double-strand breaks (DSBs) induced by topoisomerase I. We report that defects of p21(CDKN1A) and p53 enhance camptothecin-induced histone H2AX phosphorylation (gammaH2AX), a marker for DNA DSBs. In human colon carcinoma HCT116 cells with wild-type (wt) p53, gammaH2AX reverses after camptothecin removal. By contrast, gammaH2AX increases after camptothecin removal in HCT116 cells deficient for p53 (p53-/-) or p21(CDKN1A) (p21-/-) as the cells reach the late-S and G2 phases. Since p21-/- cells exhibit similar S-phase arrest as wt cells in response to camptothecin and aphidicolin does not abrogate the enhanced gammaH2AX formation in p21-/- cells, we conclude that enhanced gammaH2AX formation in p21-/- cells is not due to re-replication. The cell cycle checkpoint abrogator and Chk1/Chk2 inhibitor 7-hydroxystaurosporine (UCN-01) also increases camptothecin-induced gammaH2AX formation and inhibits camptothecin-induced p21(CDKN1A) upregulation in HCT116 wt cells. TUNEL (terminal deoxynucleotidyl transferase (TdT)-mediated dUTP-biotin nick end labeling) assays demonstrate that gammaH2AX formation in late S and G2 cells following CPT treatment corresponds to DNA breaks. However, these breaks are not related to apoptotic DNA fragmentation. We propose that p21(CDKN1A) prevents the collapse of replication forks damaged by stabilized topoisomerase I cleavage complexes.
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Affiliation(s)
- T Furuta
- Laboratory of Molecular Pharmacology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Kanemitsu K, Kunishima H, Hatta M, Inden K, Saga T, Ouchi H, Ishizawa K, Harigae H, Takemura H, Kaku M. Evaluation of a fully automated system (RAISUS) for rapid identification and antimicrobial susceptibility testing of Staphylococci. J Clin Microbiol 2005; 43:5808-10. [PMID: 16272527 PMCID: PMC1287811 DOI: 10.1128/jcm.43.11.5808-5810.2005] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
RAISUS is a system for rapid bacterial identification and antimicrobial susceptibility testing. RAISUS and VITEK showed 97.8% and 75.9% agreement in identification of 45 Staphylococcus aureus strains and 58 coagulase-negative staphylococci (CoNS), respectively, and RAISUS and CLSI (formerly NCCLS) methods showed 87.2% and 87.9% agreement in the MICs for S. aureus and CoNS, respectively. RAISUS provided these data within 3.75 h, suggesting its utility for clinical bacteriological laboratories.
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Affiliation(s)
- K Kanemitsu
- Department of Infection Control and Laboratory Diagnostics, Tohoku University Graduate School of Medicine, 1-1 Seiryo-machi, Aobaku, Sendai, Miyagi 980-8574, Japan.
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31
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Fukumoto Y, Umeda Y, Imaizumi M, Miyauchi T, Shimabukuro K, Takemura H. [Arch first technique using handmade branched graft]. Kyobu Geka 2005; 58:997-1001. [PMID: 16235850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We created a method using handmade branched graft to do the aortic arch surgery easier and safer. We made the branched graft using 12 and 8 mm vascular graft. A 77-year-old man with Stanford type A aortic dissection was operated with this method under deep hypothermia. After aortic root manipulation, perfusion of the aortic arch was stopped and selective cerebral perfusion was established. Left subclavian artery (LSCA) was anastomosed to one of the branches. The perfusion of the LSCA was re-started via one of its branches. Respectively, left common carotid artery and brachiocephalic artery reconstruction and reperfusion were performed in a same fashion. After distal anastomosis, anastomosis between the branched graft and main graft was performed consecutively. Postoperative course was uneventful and there was no complication. The treatment of our branched graft was easier than that of ready-made 4-branched graft. We could perform the operation under clear view for its movability with minimal cerebral ischemic time.
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Affiliation(s)
- Y Fukumoto
- Department of Advanced Surgery, Division of Organ Pathobiology, Gifu University School of Medicine, Gifu, Japan
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32
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Ishino M, Mise K, Takemura H, Ahmed MU, Alam MM, Naik TN, Kobayashi N. Comparison of NSP4 protein between group A and B human rotaviruses: detection of novel diarrhea-causing sequences in group B NSP4. Arch Virol 2005; 151:173-82. [PMID: 16132179 DOI: 10.1007/s00705-005-0616-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2005] [Accepted: 07/04/2005] [Indexed: 11/27/2022]
Abstract
The human group B rotavirus is a causative agent of severe adult diarrhea. In this study, we analyzed the NSP4 structure of a group B rotavirus strain, CAL-1, and determined whether enterotoxin activity was present in CAL-1 NSP4. CAL-1 NSP4 was comprised of 219 amino acids which was longer than group A and C rotavirus NSP4, and the primary structures of their sequences differed considerably. However, CAL-1 NSP4 had an enterotoxin-like sequence (residues 106-127) that was only 27% identical to the enterotoxin region of NSP4 of KUN (a group A rotavirus strain) at residues 114-135. Interestingly, both of the synthetic peptides, one (residues 99-128) containing the enterotoxin-like sequence and the other (residues 191-219) containing 29 C-terminal amino acids of CAL-1 NSP4, induced diarrhea in 5.5-day-old mice, but not in 17.5-day-old mice, when administered parenterally. Thus, rotavirus "enterotoxin" sequences could be considerably divergent.
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Affiliation(s)
- M Ishino
- Department of Hygiene, Sapporo Medical University, Sapporo, Japan.
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33
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Iwata H, Takemura H, Yamada T, Shirahashi K, Matsumoto S, Yoshikawa S, Umeda Y, Iwaki Y. Average P/F ratio during donor management for finding out the potential donor of lung procurement. Transplant Proc 2005; 37:1845-7. [PMID: 15919483 DOI: 10.1016/j.transproceed.2005.02.091] [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: 11/21/2022]
Abstract
We investigated the potential donors from cases without lung procurement in spite of considering procurement as the donor. We reviewed 207 cases considered for lung procurement. Donors were divided into 2 groups according to whether or not their lungs were harvested: 50 did and 157 did not. We investigated their age, gender, donor management periods, blood pressure, heart rate, P/F ratio, PCO2, HCO3, positive end-expiratory pressure (PEEP), respiratory rate, abnormal findings in the chest X-ray, blood chemistries, sputum culture, and intravenous administration of steroid. Univariable or multivariable logistic regression analysis was used to predict lung harvesting by various factors. Univariable logistic regression analysis revealed maximum heart rate (HR) and respiratory rate (RR), maximum, minimum, and average P/F ratio, and abnormal findings in the chest X-ray, to be predictors to perform transplant. The maximum HR and RR of the non-harvest group are higher than those of the harvest group. Multivariable logistic regression analysis revealed average P/F ratio only to be a predictor to transplant. We divided the non-harvest group into 2 groups according to whether or not their P/F ratio was >300: 55 did (P/F 300 group) and 102 did not (P/F 299 group). Between P/F 299 group and the harvest group, univariable logistic regression analysis revealed maximum HR, maximum and minimum RR, maximum PEEP, maximum, minimum, and average P/F ratio, and abnormal findings in the chest X-ray to be predictors to transplant. Maximum HR, PEEP, and maximum and minimum RR of the P/F 299 group are higher than those of the harvest group. Maximum, minimum, and average P/F ratio of the P/F 299 group are lower than those of the harvest group. The average PCO2 of P/F 299 group is higher than that of the harvest group. The rate of abnormal findings in the chest X-ray of the P/F 299 group is higher than that of the harvest group. Multivariable logistic regression analysis revealed average P/F ratio only to be a predictor to transplant. There were no predictors between the P/F 300 group and the harvest group in both univariable and multivariable logistic regression analyses. Furthermore, there were no different factors between the P/F 300 group and the harvest group. Our study showed that 35.5% of the non-harvest group had a P/F ratio of >300 and had no difference compared with the harvest group. Our data suggest that potential donors existed in the non-harvest group and increased the number of lung procurement to 27.3% from 13.0% of all donors.
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Affiliation(s)
- H Iwata
- Advanced Surgery, Graduate School of Medicine, Gifu University, Gifu City, Gifu, Japan.
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Moriyama H, Tomita S, Tabata S, Nagamine H, Arai S, Takemura H, Watanabe G. [Clinical experience with aortic connector system]. Kyobu Geka 2005; 58:89-92; discussion 92-5. [PMID: 15724468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
From April to December 2002, 40 patients underwent coronary artery bypass grafting (CABG) using the St. Jude Medical (Minneapolis) Symmetry bypass system (aortic connector system: ACS). 59 proximal anastomoses (51 saphenous vein grafts, 8 radial artery grafts) were performed with the ACS. One saphenous vein graft occluded during operation. Postoperative evaluation of the anastomotic patency was carried out by angiography in 45 grafts. Five of the saphenous vein grafts were occluded (5/38). One patient who was shock state before operation presented with postoperative unconsciousness. Another patient died at 8th postoperative day caused by ventricular fibrillation. We conclude that the ACS produces a simple, quick way of performing the proximal anastomosis without the need for clamping the aorta, allows reducing risk of embolization by aortic manipulation. However, it is necessary to discuss sufficiently using the ACS, because the graft patency with the ACS is lower than with standard suturing technique.
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Affiliation(s)
- Hideki Moriyama
- Department of General and Cardiothoracic Surgery, School of Medicine, Kanazawa University, Kanazawa, Japan
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Shimomura T, Takemura H, Narita Y, Ohara Y, Usui A, Ueda Y. [Surgery for acute aortic dissection concomitant with preceding axillofemoral bypass to prevent malperfusion of visceral organs and limb ischemia]. Kyobu Geka 2004; 57:385-7. [PMID: 15151039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
A 52-year-old man was admitted with sudden onset of epigastralgia. Abdominal X-ray showed dilated intestine and computed tomography (CT) revealed extended type A aortic dissection. Marked abdominal distention and weak pulse of right femoral artery were recognized so malperfusion of visceral organs due to narrowing true lumen compressed by thrombosed false lumen was suggested. In the operation, right axillo-right femoral bypass was established preceding to median sternotomy. This graft was used as an arterial perfusion site of cardiopulmonary bypass, and replacement of the ascending aorta was performed under hypothermic circulatory arrest and retrograde cerebral perfusion. Sign of malperfusion of visceral organs was showed for several days after the operation but it disappeared without further intervention. Axillofemoral inflow of cardiopulmonary bypass may be effective procedure in these cases.
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Affiliation(s)
- T Shimomura
- Department of Cardiothoracic Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
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Asaumi Y, Nagamine H, Takemura H, Arai S, Tomita S, Watanabe G. P.1.21 A new balloon type device for pulmonary vein isolation for treatment of atrial fibrillation. Europace 2003. [DOI: 10.1016/eupace/4.supplement_1.a38-a] [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] [Indexed: 10/14/2022] Open
Affiliation(s)
- Y. Asaumi
- The department of general and cardiothoracic surgery, Kanazawa University School of Medicine, Ishikawa, Japan
| | - H. Nagamine
- The department of general and cardiothoracic surgery, Kanazawa University School of Medicine, Ishikawa, Japan
| | - H. Takemura
- The department of general and cardiothoracic surgery, Kanazawa University School of Medicine, Ishikawa, Japan
| | - S. Arai
- The department of general and cardiothoracic surgery, Kanazawa University School of Medicine, Ishikawa, Japan
| | - S. Tomita
- The department of general and cardiothoracic surgery, Kanazawa University School of Medicine, Ishikawa, Japan
| | - Go Watanabe
- The department of general and cardiothoracic surgery, Kanazawa University School of Medicine, Ishikawa, Japan
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Sato M, Matsumoto Y, Morita H, Takemura H, Shimoi K, Amano I. Effects of vitamin supplementation on microcirculatory disturbance in hemodialysis patients without peripheral arterial disease. Clin Nephrol 2003; 60:28-34. [PMID: 12872855 DOI: 10.5414/cnp60028] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIMS Dysfunctional endothelium caused by oxidative stress is thought to play a role in pathogenesis of a variety of conditions including atherosclerosis. We investigated whether a microcirculatory disturbance in hemodialysis (HD) patients was associated with increased oxidative stress and endothelial injury. PATIENTS AND METHODS Transcutaneous oxygen tension (TcPO2) on the dorsum of the foot at rest was measured as a marker of microcirculation in 33 patients undergoing HD without clinical manifestations of peripheral arterial disease and 20 healthy controls. Furthermore, in order to examine whether TcPO2 was affected by antioxidants, oral supplementation with a combination of vitamin C (200 mg daily) and vitamin E (600 mg daily) was administered for 6 months to 8 patients with microcirculatory disturbance (TcPO2 values of 50 mmHg or less). Serum biochemical parameters including vitamins were also measured. RESULTS Mean TcPO2 value was significantly lower in HD patients than in control subjects (47.9 +/- 13.5 mmHg versus 62.4 +/- 11.9 mmHg, p < 0.001). After vitamin supplementation, TcPO2 values remarkably increased (40.6 +/- 10.0 mmHg versus 57.4 +/- 6.5 mmHg, p < 0.005). Serum vitamin C and vitamin E levels increased significantly as well, while serum levels of thrombomodulin, a marker of endothelial injury, and thiobarbituric acid reactants, a marker of lipid peroxidation, were significantly decreased in comparison with those before supplementation. CONCLUSIONS Our results suggest that the microcirculatory disturbance in HD patients seems to be associated with endothelial damage caused by oxidative stress. Combined supplementation with vitamin C and vitamin E may be of clinical benefit in improving the cutaneous microcirculation by reducing oxidative stress.
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Affiliation(s)
- M Sato
- Department of Dialysis Therapy, Social Insurance Chukyo Hospital, Nagoya, Japan.
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Watanabe G, Takemura H, Tomita S, Misaki T, Kotoh K. Multiple minimally invasive direct CABG for the complete revascularization: the figure L approach. Thorac Cardiovasc Surg 2003; 51:28-32. [PMID: 12587085 DOI: 10.1055/s-2003-37271] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND Coronary artery bypass grafting on the beating heart via median sternotomy causes significant hemodynamic compromise during displacement of the heart, especially in patients with low ejection fraction or those who have potential catastrophic sternal reentry injuries. We have developed an innovative minimally invasive surgical approach (figure L Approach) for the treatment of multi-vessel coronary artery disease; especially in cases with huge hearts (> CTR 50 %) including tracheostomy requiring COLD, and redo cases. The objective of this study was to assess the efficacy and safety of this alternative surgical incision. METHODS From January 1998 to March 2001, 22 patients underwent complete revascularization using this figure L Approach. Left submammary anterior thoracotomy incisions are made with the medial part of the incision vertically extending downward to the upper abdomen. The costal margin was divided. The pleural and peritoneal spaces were then entered. A chest retractor was placed to elevate the chest wall, exposing the heart and stomach. Two to four arterial grafts including LIT A, RGEA, RA and IEA were harvested. Revascularization of the LAD, LCX and distal RCA were performed in 22 patients without cardiopulmonary bypass on complex performed arterial grafts using this approach. In four patients, triple and quadruple vessel grafting was performed. RESULTS No early deaths or postoperative complications occurred. The mean coronary clamp time was 12.5 +/- 5.1 minutes for the LAD, 10.8 +/- 1.8 minutes for diagonal branch, 14.1 +/- 2.9 minutes for the LCX and 16.0 +/- 5.1 minutes RCA time. There were no late deaths or angina during the mean follow-up of 37.3 +/- 9.0 months. Postoperative coronary angiography demonstrated widely patent grafts in all but one patient. Hemodynamics did not change significantly during the distal anastomoses. No wound-healing problems were experienced. CONCLUSIONS Multiple MIDCABG using the figure L Approach represents a novel way of approaching both the LAD, CX and distal RCA in patients with multi-vessel disease, especially in those with low ejection fraction, huge heart (> CTR 50 %), or hemodynamically unstable patients, without any hemodynamic deterioration or sternal related complication.
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Affiliation(s)
- G Watanabe
- Department of General and Cardiothoracic Surgery, Kanazawa University School of Medicine, Japan
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Tsutsumi A, Ebitsuka T, Murata H, Takemura H, Sumida T. An HLA-B27-positive patient diagnosed with ulcerative colitis 15 years after the onset of arthropathy. Mod Rheumatol 2002; 12:349-53. [PMID: 24384006 DOI: 10.3109/s101650200063] [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]
Abstract
Abstract A 28-year-old woman had persistent pain of both hip joints since the age of 13 years. X-ray analysis showed destructive changes in both hip joints and ossification of sacroiliitic joints. The patient had mild diarrhea and slight abdominal pain for 8 years. Blood-stained stool was not noticed. Barium enema showed changes consistent with the diagnosis of ulcerative colitis (UC). Inflammatory bowel syndrome should be considered in patients with persistent coxitis, even in the absence of severe abdominal symptoms.
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Affiliation(s)
- A Tsutsumi
- Division of Rheumatology, Department of Internal Medicine, Institute of Clinical Medicine, University of Tsukuba , 1-1-1 Tennodai, Tsukuba 305-8575 , Japan
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Suzuki T, Nangaku M, Oku S, Takemura H, Yokoyama Y, Takahashi Y, Fujita T. Captopril renography in Bartter's syndrome. Clin Exp Nephrol 2002; 6:163-5. [PMID: 24989957 DOI: 10.1007/s101570200028] [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: 10/27/2022]
Abstract
We describe a 19-year-old man who developed muscle weakness due to hypokalemia. His blood pressure on admission was considered to be relatively high, and we performed captopril renography. His baseline renogram was normal, while the results of captopril renography showed delayed patterns similar to those of renovascular hypertension. However, his blood pressure level decreased and returned to the normal range without medication 2 weeks after admission. Our final diagnosis in this patient was Barter's syndrome. We speculate that the delayed pattern of captopril renography was due to an imbalance between the prostaglandin and the renin-angiotensin systems. The blockade of the renin-angiotensin system by captopril may cause dominant prostaglandins, produce systemic vasodilatory effects, and lead to hypoperfusion of the kidneys in patients with Bartter's syndrome.
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Affiliation(s)
- T Suzuki
- Division of Nephrology and Endocrinology, The University of Tokyo School of Medicine, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan Tel. +81-3-5800-9735; Fax +81-3-5800-9736 e-mail: , JP
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41
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Nishikitani M, Kokubo A, Takemura H, Saigenji K, Kawahara K. Serosal application of Ba(2+) induces oscillatory chloride secretion via activation of submucosal cholinergic neurones in guinea-pig distal colon. Acta Physiol Scand 2002; 174:257-64. [PMID: 11906325 DOI: 10.1046/j.1365-201x.2002.00938.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The enteric nervous system regulates ion and fluid secretion in the mammalian intestine at both resting and stimulated conditions. To determine the type and activation mechanism of neurones involved, mucosa-submucosa sheets isolated from guinea-pig distal colon were studied in vitro in Ussing chambers. Serosal addition of 0.5-1 mM barium (Ba(2+)), a potassium (K(+)) channel inhibitor, caused oscillatory increases in short-circuit current (I(sc)). Mean values of the size and frequency of I(sc) were 369.1 microA cm(-2) and 2.3 min(-1). The oscillatory I(sc) induced by the low concentrations of Ba(2+) was blocked by either higher concentrations of Ba(2+) (2-5 mM) or other K(+) channel inhibitors, such as tetraethylammonium (TEA) (1 mM) and quinine (20 mM). The Ba(2+)-induced oscillatory I(sc) was also inhibited by tetrodotoxin (TTX) and atropine. In a nominally Ca(2+) free solution plus serosal addition of 0.1 mM ethylene glycol-bis (beta-aminoethyl ether) N,N,N',N'-tetraacetic acid (EGTA), a Ca(2+) chelator, the oscillatory I(sc) slowed and diminished. Further, the Ba(2+)-induced oscillatory I(sc) was partially inhibited by apical addition of 100 microM 5'-nitro-2-(3-phenylpropylamino)benzoic-acid (NPPB), a Cl(-) channel inhibitor, and completely disappeared in a low Cl(-) solution (11 mM) on both sides. On the other hand, application of either cimetidine, a histamine H(2) receptor antagonist, or hexamethonium, a nicotinic antagonist, to the serosal side did not affect the Ba(2+)-induced oscillatory I(sc). In conclusion, the Ba(2+)-induced oscillatory I(sc) is the transepithelial Cl(-) current which is stimulated by activation of cholinergic neurones in submucosal plexus of guinea-pig distal colon.
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Affiliation(s)
- M Nishikitani
- Department of Physiology, Kitasato University School of Medicine, Sagamihara, Japan
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42
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Terakubo S, Takemura H, Yamamoto H, Ikejima H, Kunishima H, Kanemitsu K, Kaku M, Shimada J. Antimicrobial activity of everninomicin against clinical isolates of Enterococcus spp., Staphylococcus spp., and Streptococcus spp. tested by Etest. J Infect Chemother 2001; 7:263-6. [PMID: 11810596 DOI: 10.1007/s101560170025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2001] [Accepted: 05/16/2001] [Indexed: 10/27/2022]
Abstract
The in-vitro antimicrobial activity of everninomicin, a novel oligosaccharide antibiotic, was tested against clinical isolates of 11 methicillin-susceptible Staphylococcus aureus (MSSA) strains, 11 methicillin-resistant S. aureus (MRSA) strains, 22 Staphylococcus epidermidis strains, 23 Enterococcus faecalis strains, 23 Enterococcus faecium strains, 23 Enterococcus avium strains, 27 Streptococcus pneumoniae strains, 22 Streptococcus pyogenes strains, and 20 Streptococcus agalactiae strains. The minimum inhibitory concentrations (MICs) of everninomicin were determined by Etest and compared with those of vancomycin, teicoplanin, and minocycline. The Etest showed that everninomicin exhibited excellent activity (MIC, <0.016 to 1.5 microg/ml) against the gram-positive cocci tested. The antimicrobial activity of everninomicin against S. aureus and S. epidermidis was stronger than that of vancomycin, teicoplanin, and minocycline, in particular against MRSA, with an MIC50 of 0.38 microg/ml and an MIC90 of 0.5 microg/ml. Against strains of enterococci and streptococci, everninomicin was more active than vancomycin, but as active as teicoplanin.
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Affiliation(s)
- S Terakubo
- Department of Microbiology, St. Marianna University School of Medicine, Sugao, Miyamae, Kawasaki, Kanagawa 216-8511, Japan
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Kanemitsu K, Yamamoto H, Takemura H, Kaku M, Shimada J. Relatedness between the coagulase gene 3'-end region and coagulase serotypes among Staphylococcus aureus strains. Microbiol Immunol 2001; 45:23-7. [PMID: 11270603 DOI: 10.1111/j.1348-0421.2001.tb01270.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The 3'-end region of the coagulase gene from 22 strains of Staphylococcus aureus including 10 standard serotype strains was sequenced, and five subgroups with 4-8 tandem repeating units were distinguished among the tested strains. Phylogenetic analysis of the 3'-end region of the coagulase gene indicated that strains belonging to the same serotype were clustered in the same branch. A phylogenetic tree of the deduced amino acid sequences revealed that the C-terminal region might not be responsible for the epitope of the coagulase protein.
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Affiliation(s)
- K Kanemitsu
- Department of Microbiology, St. Marianna University School of Medicine, Kawasaki, Kanagawa, Japan.
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Abstract
Syn- And anti-[3.3](3,9)carbazolophanes, which are suitable model compounds for sandwich and partial-overlap excimers, respectively, have been synthesized and characterized; the structures of both singlet and triplet carbazole excimer have been described.
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Affiliation(s)
- K Tani
- Division of Natural Science, Osaka Kyoiku University, Asahigaoka, Kashiwara, Osaka 582-8582, Japan.
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Kanemitsu K, Nishino T, Kunishima H, Okamura N, Takemura H, Yamamoto H, Kaku M. Quantitative determination of gelatinase activity among enterococci. J Microbiol Methods 2001; 47:11-6. [PMID: 11566222 DOI: 10.1016/s0167-7012(01)00283-4] [Citation(s) in RCA: 39] [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: 11/20/2022]
Abstract
Gelatinase, hemolysin and aggregation substance have all been reported to be virulence factors of enterococci. In this study, gelatinase production was investigated in isolates of Enterococcus faecalis (n=93), E. faecium (n=49) and E. avium (n=36) recovered from hospitalized patients. Gelatinase was detected in 45% of E. faecalis isolates, but could not be detected in E. faecium and E. avium. Gelatinase activity was then measured by radial diffusion for the 42 gelatinase-positive E. faecalis isolates. To convert gelatinase activity into proteinase K activity, a standard curve was produced by placing different concentrations of proteinase K into wells in the gelatine plate. Gelatinase activity per E. faecalis colony ranged from 2.6 x 10(-7) to 2.2 x 10(-5) microg/ml, proportionate to the activity of proteinase K. An approximately 84-fold difference in gelatinase concentration was observed between the colony producing the highest amount and that producing the lowest amount. This method may be useful for determining the virulence of given isolates in relation to gelatinase production as it is quick, easy and inexpensive to perform.
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Affiliation(s)
- K Kanemitsu
- Department of Molecular Diagnostics, Tohoku University Graduate School of Medicine, 1-1 Seiryocho Aobaku Sendai, Miyagi 980-8574, Japan.
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Takemura H, Nakashima S, Kon N, Yasutake M, Shinmyozu T, Inazu T. A study of C-F...M(+) interaction: metal complexes of fluorine-containing cage compounds. J Am Chem Soc 2001; 123:9293-8. [PMID: 11562211 DOI: 10.1021/ja0043587] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The C-F...M(+) interaction was investigated by observation of the NMR spectroscopic changes and complexation studies between metal cations and the cage compounds 1 and 2 which have fluorobenzene units as donor atoms. As a result, the interaction was detected with all of the metal cations which form complexes with 1 and 2. The stability of the complexes of 1 and 2 was determined by the properties of the metal cations (ionic radii and degree of hydrolysis), not by the hard-soft nature of the cations. Crystallographic analyses of Tl(+) subset 1 and La(3+) subset 2 provided structural information (interatomic distances and bond angles), and the bond strengths, C-F...M(+), O...M(+), and N...M(+), were estimated by Brown's equation based on the structural data. Short C-F...Tl(+) (2.952-3.048 A) distances were observed in the complex Tl(+) subset 1. The C-F bond lengths in the complexes, Tl(+) subset 1 and La(3+) subset 2, are elongated compared to those of the metal-free compounds. Interestingly, no solvent molecules including water molecules were coordinated to La(3+) in the La(3+) subset 2. The stabilization energy of cation-dipole interaction was calculated on the basis of the data from X-ray crystallographic analysis, and it is roughly consistent with the (-)Delta H values estimated in solution. Thus, the C-F...M(+) interaction can be expressed by the cation-dipole interaction. This result explains the fact that compound 1 which has fluorine atom as hard donor strongly binds soft metals such as Ag(+) and Tl(+). Furthermore, it was concluded that the fluorobenzene unit has a poor electron-donating ability compared to that of ether oxygen or amine nitrogen, and thus the ratio of the coordination bond in C-F...M(+) is small. The specific and remarkable changes in the (1)H, (13)C, and (19)F NMR spectra were observed accompanied by the complexation between M(+) and the hosts 1 and 2. These spectral features are important tools for the investigation of the C-F...M(+) interaction. Furthermore, F.Tl(+) spin couplings were observed at room temperature in the Tl(+) subset 1, 2 (J(F-Tl) = 2914 Hz for Tl(+) subset 1 and 4558 Hz for Tl(+) subset 2), and these are clear and definitive evidence of the interaction.
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Affiliation(s)
- H Takemura
- Department of Chemistry, Faculty of Science, Kyushu University, Ropponmatsu 4-2-1, Chuo-ku, Fukuoka, 810-8560 Japan
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Suzuki T, Takemura H, Noiri E, Nosaka K, Toda A, Taniguchi S, Uchida K, Fujita T, Kimura S, Nakao A. Puromycin aminonucleoside induces apoptosis and increases HNE in cultured glomerular epithelial cells(1). Free Radic Biol Med 2001; 31:615-23. [PMID: 11522446 DOI: 10.1016/s0891-5849(01)00641-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Puromycin aminonucleoside induces apoptosis and increases 4-hydroxy-2-nonenal (HNE) in cultured glomerular epithelial cells. We have previously reported the detachment of cultured glomerular epithelial cells (GECs) from their substrata by puromycin aminonucleoside (PAN) treatment. In this study we explored whether or not apoptosis was involved in the mechanisms of the detachment. DNA fragmentation on gel electrophoresis was clearly shown by 10(-3) M PAN treatment of GECs. Nuclear staining by Hoechst 33342 indicated the greatest number of apoptotic cells at 10(-3) M PAN for 48 h treatment. Similarly, TUNEL methods revealed maximal apoptotic cells at 10(-3) M PAN for 48 h treatment. Caspase-3 (like) protease activity increased at 10(-3) M PAN, and decreased at 2 x 10(-3) M PAN for 48 h treatment as well as at 10(-3) M PAN for 60 h treatment. Pretreatment with 2'-deoxycoformycin (DCF), inhibitor of adenosine deaminase, abolished these effects of PAN on cultured GECs. PAN treatment increased HNE, a lipid peroxide adduct, modified protein in cultured GECs, which was also prevented by pretreatment by DCF. These results for the first time indicate that the PAN-induced detachment of GECs from culture substrata is mediated at least in part through apoptosis via oxidative stresses by adenosine deaminase activity.
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Affiliation(s)
- T Suzuki
- Department of Nephrology and Endocrinology, University of Tokyo Medical School, Japan
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Takemura H, Noiri E. [Patients reporting abnormalities in urination]. Nihon Naika Gakkai Zasshi 2001; 90:1242-7. [PMID: 11519102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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Ikejima H, Haranaga S, Takemura H, Kamo T, Takahashi Y, Friedman H, Yamamoto Y. PCR-based method for isolation and detection of Chlamydia pneumoniae DNA in cerebrospinal fluids. Clin Diagn Lab Immunol 2001; 8:499-502. [PMID: 11329447 PMCID: PMC96090 DOI: 10.1128/cdli.8.3.499-502.2001] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Since current studies indicate the possible involvement of Chlamydia pneumoniae in the pathogenesis of multiple sclerosis (MS), demonstration of C. pneumoniae in the cerebrospinal fluid (CSF) of patients with MS is highly desirable. However, there is controversy concerning the detection of C. pneumoniae in CSFs from MS patients due to the lack of a standard protocol for extraction and detection of C. pneumoniae DNA. In this regard, we attempted to establish a highly effective extraction protocol for C. pneumoniae DNA from CSFs utilizing a commercial kit and a PCR detection method. The extraction and PCR detection protocol established in this study succeeded in detecting as few as 20 C. pneumoniae organisms in 200 microl of mock CSF. The use of this protocol to detect C. pneumoniae DNA in CSFs revealed that 68% of CSF samples obtained from patients with MS were positive (11 out of 16 samples) for chlamydia DNA. Thus, the protocol established here is sensitive enough to detect chlamydia DNA from CSFs and can be used by other laboratories for evaluation of the presence of chlamydiae in CSFs because the protocol is based on the use of a commercial kit.
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Affiliation(s)
- H Ikejima
- Department of Medical Microbiology and Immunology, University of South Florida College of Medicine, Tampa, Florida 33612, USA
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Takemura H, Kon N, Kotoku M, Nakashima S, Otsuka K, Yasutake M, Shinmyozu T, Inazu T. A study of C-F.M+ interaction: alkali metal complexes of the fluorine-containing cage compound. J Org Chem 2001; 66:2778-83. [PMID: 11304201 DOI: 10.1021/jo0016778] [Citation(s) in RCA: 19] [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: 11/29/2022]
Abstract
The C-F.M(+) interaction was investigated by employing a cage compound 1 that has four fluorobenzene units. The NMR ((1)H, (13)C, and (19)F) spectra and X-ray crystallographic analyses of 1 and its metal complexes showed clear evidence of the interaction. Short C-F.M(+) distances (C-F.K(+), 2.755 and 2.727 A; C-F.Cs(+), 2.944 and 2.954 A) were observed in the crystalline state of K(+) subset 1 and Cs(+) subset 1. Furthermore, the C-F bond lengths were elongated by the interaction with the metal cations. By calculating Brown's bond valence, it is shown that the contribution of the C-F unit to cation binding is comparable or greater than the ether oxygen in the crystalline state. Representative spectroscopic changes implying the C-F.M(+) interaction were observed in the NMR ((1)H, (13)C, and (19)F) spectra. In particular, (133)Cs-(19)F spin coupling (J = 54.9 Hz) was observed in the Cs(+) complex.
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Affiliation(s)
- H Takemura
- Department of Chemistry, Faculty of Science, Kyushu University, Ropponmatsu 4-2-1, Chuo-ku, Fukuoka 810-8560, Japan.
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