1
|
Hasegawa K, Maedomari R, Sato Y, Gotoh K, Kudoh S, Kojima A, Okada S, Ito T. Corrigendum: Kiss1R Identification and Biodistribution Analysis Employing a Western Ligand Blot and Ligand-Derivative Stain with a FITC-Kisspeptin Derivative. ChemMedChem 2021; 16:725. [PMID: 33594770 DOI: 10.1002/cmdc.202000990] [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: 11/05/2022]
|
2
|
Hasegawa K, Maedomari R, Sato Y, Gotoh K, Kudoh S, Kojima A, Okada S, Ito T. Kiss1R Identification and Biodistribution Analysis Employing a Western Ligand Blot and Ligand-Derivative Stain with a FITC-Kisspeptin Derivative. ChemMedChem 2020; 15:1699-1705. [PMID: 32706162 DOI: 10.1002/cmdc.202000356] [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] [Received: 05/26/2020] [Revised: 06/22/2020] [Indexed: 11/09/2022]
Abstract
It is not always easy to establish specific antibodies against receptors. Most receptors are hydrophobic and have complicated three-dimensional structures, making them difficult to use as immunogens. Thus, we developed receptor detection methods with a fluorescein-labeled ligand as an antibody alternative, which we referred to as a western ligand blot (WLB) and ligand derivative stain (LDS). Kisspeptin receptor (Kiss1R) was detected by its ligand. Kiss1R expression was confirmed in eight human cell lines by the WLB and in four pathological tissues by the LDS. Next, Kiss1R was stained by LDS in organs, revealing Kiss1R expression by [67 Ga]Ga-DOTA-kisspeptin 10 accumulation. As a result, Kiss1R-expressing cells in each organ could be stained with fluorescein-labeled kisspeptin 14 instead of an antibody and observed by light microscopy. The combination of the WLB and LDS allows identification of receptors in tissues, which can be readily applied to target receptor detection by a synthetic ligand derivative.
Collapse
Affiliation(s)
- Koki Hasegawa
- Center for Instrumental Analysis, Kyoto Pharmaceutical University, Misasagishichyonochyo 1 Yamashina-ku, Kyoto, 607-8412, Japan
| | - Rika Maedomari
- Department of Pathology and Experimental Medicine Graduate School of Medical Sciences, Kumamoto University, Honjyo 1-1-1, Chyuo-ku, Kumamoto, 860-855, Japan
| | - Younosuke Sato
- Department of Pathology and Experimental Medicine Graduate School of Medical Sciences, Kumamoto University, Honjyo 1-1-1, Chyuo-ku, Kumamoto, 860-855, Japan
| | - Kumiko Gotoh
- Department of Radioisotope Science Institute of Resource Development and Analysis, Kumamoto University, Honjyo 1-1-1, Chyuo-ku, Kumamoto, 860-8556, Japan
| | - Shinji Kudoh
- Department of Pathology and Experimental Medicine Graduate School of Medical Sciences, Kumamoto University, Honjyo 1-1-1, Chyuo-ku, Kumamoto, 860-855, Japan
| | - Akihiro Kojima
- Department of Radioisotope Science Institute of Resource Development and Analysis, Kumamoto University, Honjyo 1-1-1, Chyuo-ku, Kumamoto, 860-8556, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Joint Research Center for Human Retrovirus Infection, Kumamoto University, Honjyo 1-1-1, Chyuo-ku, Kumamoto, 860-8556, Japan
| | - Takaaki Ito
- Department of Pathology and Experimental Medicine Graduate School of Medical Sciences, Kumamoto University, Honjyo 1-1-1, Chyuo-ku, Kumamoto, 860-855, Japan
| |
Collapse
|
3
|
Matsuba T, Kubozono H, Saegusa A, Obata K, Gotoh K, Miki K, Akiyama T, Oba M. Short communication: Effects of feeding purple corn (Zea mays L.) silage on productivity and blood superoxide dismutase concentration in lactating cows. J Dairy Sci 2019; 102:7179-7182. [PMID: 31178175 DOI: 10.3168/jds.2019-16353] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 01/22/2019] [Accepted: 04/03/2019] [Indexed: 02/03/2023]
Abstract
The objective of this study was to evaluate the effects of feeding purple corn (Zea mays L.) silage on productivity and blood superoxide dismutase concentration in lactating cows. We hypothesized that feeding purple corn silage (AX-152; Nagano Animal Industry Experiment Station, Nagano, Japan, and Takii and Co. Ltd., Tokyo, Japan), which is high in anthocyanin content, would increase milk production and blood concentration of superoxide dismutase. We assigned 16 Holstein cows (8 primiparous and 8 multiparous) in mid lactation to 1 of 2 treatments in a randomized block design, with efforts to balance parity, body weight, and days in milk between treatments. Experimental diets contained either purple corn silage [PCS; 31.2% dry matter (DM), 8.4% crude protein, 40.2% neutral detergent fiber, and 26.6% starch] or conventional corn silage (CONT; 30.5% dry matter, 8.7% crude protein, 42.1% neutral detergent fiber, and 26.5% starch) at approximately 32% of diet DM. Both PCS and CONT were ensiled for 5 mo before the study. Treatment diets were fed as total mixed rations ad libitum for 12 wk from February 1 to April 25, 2016. Cows fed the PCS had increased milk yield (31.7 vs. 29.2 kg/d) and blood superoxide dismutase concentrations (9,333 vs. 8,467 U/mL) compared with those fed CONT. However, anthocyanin concentration in the PCS decreased over the 12-wk experiment: 70 mg/kg of DM for the first 4 wk, 20 mg/kg of DM for the second 4 wk, and undetectable for the last 4 wk. We did not detect anthocyanins in the CONT group at any time point. Feeding PCS may increase antioxidant capacity and milk production in dairy cows, but anthocyanin in PCS may be degraded during storage.
Collapse
Affiliation(s)
- T Matsuba
- Dairy Technology Research Institute, National Federation of Dairy Co-operative Associations (ZEN-RAKU-REN), Fukushima, Japan 969-0223
| | - H Kubozono
- Dairy Technology Research Institute, National Federation of Dairy Co-operative Associations (ZEN-RAKU-REN), Fukushima, Japan 969-0223
| | - A Saegusa
- Dairy Technology Research Institute, National Federation of Dairy Co-operative Associations (ZEN-RAKU-REN), Fukushima, Japan 969-0223
| | - K Obata
- Dairy Technology Research Institute, National Federation of Dairy Co-operative Associations (ZEN-RAKU-REN), Fukushima, Japan 969-0223
| | - K Gotoh
- Nagano Animal Industry Experiment Station, Nagano, Japan 399-0711
| | - K Miki
- Nagano Animal Industry Experiment Station, Nagano, Japan 399-0711
| | - T Akiyama
- Takii and Co. Ltd., Kyoto, Japan 600-8686
| | - M Oba
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Canada T6G 2P5.
| |
Collapse
|
4
|
Terajima H, Kobayashi S, Nagano H, Tomokuni A, Gotoh K, Sakai D, Hatano E, Seo S, Uchida Y, Ajiki T, Satake H, Kamei K, Tohyama T, Hirose T, Ikai I, Morita S, Ioka T. A randomized phase II trial of adjuvant chemotherapy with gemcitabine versus S-1 after major hepatectomy for biliary tract cancer: Kansai Hepato-Biliary Oncology Group (KHBO1208). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy282.145] [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
|
5
|
|
6
|
Kobayashi S, Tomokuni A, Gotoh K, Takahashi H, Akita H, Marubashi S, Yamada T, Teshima T, Fukui K, Fujiwara Y, Sakon M. A retrospective analysis of the clinical effects of neoadjuvant combination therapy with full-dose gemcitabine and radiation therapy in patients with biliary tract cancer. Eur J Surg Oncol 2017; 43:763-771. [DOI: 10.1016/j.ejso.2016.12.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 12/06/2016] [Accepted: 12/16/2016] [Indexed: 12/27/2022] Open
|
7
|
Miyoshi N, Ohue M, Yasui M, Noura S, Shingai T, Sugimura K, Akita H, Gotoh K, Marubashi S, Takahashi H, Okami J, Fujiwara Y, Higashiyama M, Yano M. Novel prognostic prediction models for patients with stage IV colorectal cancer after concurrent curative resection. ESMO Open 2016; 1:e000052. [PMID: 27843609 PMCID: PMC5070303 DOI: 10.1136/esmoopen-2016-000052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 03/30/2016] [Accepted: 04/03/2016] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND We developed a prediction tool for recurrence and survival in patients with stage IV colorectal cancer (CRC) following surgically curative resection. PATIENTS AND METHODS From January 1983 to December 2012, 113 patients with CRC and synchronous liver and/or lung metastatic CRC were investigated at the Osaka Medical Center for Cancer and Cardiovascular Diseases. All patients underwent curative resection of primary and metastatic lesions. In the group of patients who underwent surgery from 1983 to 2008, a Cox regression model was used to develop prediction models for 1-year, 3-year and 5-year cancer-specific survival (CSS) and relapse-free survival (RFS). In the other group of patients who underwent surgery from 2009 to 2012, the developed prediction model was validated. RESULTS Univariate analysis of clinicopathological factors showed that the following factors were significantly correlated with CSS and RFS: preoperative serum carcinoembryonic antigen level, tumour location, pathologically defined tumour invasion and lymph node metastasis, and synchronous metastatic lesions. Using these variables, novel prediction models predicting CSS and RFS were constructed using the Cox regression model with concordance indexes of 0.802 for CSS and 0.631 for RFS. The prediction models were validated by external data sets in an independent patient group. CONCLUSIONS We developed novel and reliable personalised prognostic models, integrating tumour, node, metastasis (TNM) factors as well as the preoperative serum carcinoembryonic antigen level, tumour location and metastatic lesions, to predict patients' prognosis following surgically curative resection. This individualised prediction model may help clinicians in the treatment of postoperative stage IV CRC following surgically curative resection.
Collapse
Affiliation(s)
- N Miyoshi
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - M Ohue
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - M Yasui
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - S Noura
- Department of Surgery , Osaka Rosai Hospital , Osaka , Japan
| | - T Shingai
- Department of Surgery , Saiseikai Senri Hospital , Osaka , Japan
| | - K Sugimura
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - H Akita
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - K Gotoh
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - S Marubashi
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - H Takahashi
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - J Okami
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - Y Fujiwara
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - M Higashiyama
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| | - M Yano
- Department of Surgery , Osaka Medical Center for Cancer and Cardiovascular Diseases , Osaka , Japan
| |
Collapse
|
8
|
Suico MA, Taura M, Kudo E, Gotoh K, Shuto T, Okada S, Kai H. The ETS Factor Myeloid Elf-1-Like Factor (MEF)/Elf4 Is Transcriptionally and Functionally Activated by Hypoxia. Biol Pharm Bull 2016; 39:641-7. [DOI: 10.1248/bpb.b15-00796] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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)
- Mary Ann Suico
- Department of Molecular Medicine, Faculty of Pharmaceutical Sciences, Kumamoto University
| | - Manabu Taura
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University
| | - Eriko Kudo
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University
| | - Kumiko Gotoh
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University
| | - Tsuyoshi Shuto
- Department of Molecular Medicine, Faculty of Pharmaceutical Sciences, Kumamoto University
| | - Seiji Okada
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University
| | - Hirofumi Kai
- Department of Molecular Medicine, Faculty of Pharmaceutical Sciences, Kumamoto University
| |
Collapse
|
9
|
Kojima A, Gotoh K, Shimamoto M, Hasegawa K, Okada S. Iodine-131 imaging using 284 keV photons with a small animal CZT-SPECT system dedicated to low-medium-energy photon detection. Ann Nucl Med 2015; 30:169-75. [DOI: 10.1007/s12149-015-1028-9] [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] [Received: 07/29/2015] [Accepted: 09/11/2015] [Indexed: 01/28/2023]
|
10
|
Gotoh K, Kariya R, Matsuda K, Hattori S, Vaeteewoottacharn K, Okada S. A novel EGFP-expressing nude mice with complete loss of lymphocytes and NK cells to study tumor-host interactions. Biosci Trends 2015; 8:202-5. [PMID: 25224625 DOI: 10.5582/bst.2014.01049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Enhanced green fluorescent protein (EGFP) expressing Balb/c nude mice strain with Rag-2 and Jak3 double mutants (Nude-R/J-EGFP mice) was established to improve the take rate of human tumors and to distinguish tumor and host cells. EGFP was ubiquitously expressed in all organs including the brain, lung, liver, heart, kidney, spleen, and gastrointestinal tract in Nude-R/J-EGFP mice. The mice showed complete loss of T lymphocytes, B lymphocytes, and NK cells, indicating a higher take rate of human tumor xenograft. M213-mCherry, an mCherry expressing the cholangiocarcinoma cell line, was successfully detected and tumor vessels derived from the host were clearly identified with fluorescence imager. Thus, dual-color fluorescence imaging visualizes the tumor-host interaction by non-invasive in vivo fluorescent imaging in Nude-R/J-EGFP mice. These finding suggests that Nude-R/J-EGFP mice are becoming a powerful tool to investigate human tumor-host interactions.
Collapse
Affiliation(s)
- Kumiko Gotoh
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University
| | | | | | | | | | | |
Collapse
|
11
|
Marubashi S, Gotoh K, Akita H, Takahashi H, Ito Y, Yano M, Ishikawa O, Sakon M. Anatomical versus non-anatomical resection for hepatocellular carcinoma. Br J Surg 2015; 102:776-84. [PMID: 25847111 DOI: 10.1002/bjs.9815] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 02/09/2015] [Accepted: 02/26/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND The optimal surgical resection method in patients with HCC to minimize the risk of local recurrence has not yet been determined. The aim of this study was to compare the prognosis following anatomical versus non-anatomical hepatic resection for hepatocellular carcinoma (HCC). METHODS Consecutive patients with HCC without macroscopic vascular invasion, treated by curative resection between 1981 and 2012 at Osaka Medical Centre, were included in this retrospective study. The outcomes of patients selected by propensity score matching were compared. RESULTS Some 1102 patients were included, 577 in the anatomical and 525 in the non-anatomical resection group. By propensity score matching, 329 patients were selected into each group. Demographic, preoperative and tumour variables were similar between the propensity score-matched groups, including tumour size, tumour multiplicity, α-fetoprotein level and 15-min indocyanine green retention rate at 15 min. The incidence of microvascular invasion was higher in the matched anatomical resection group (P = 0·048). Stratified analysis of recurrence-free and overall survival rates revealed no statistically significant differences between the two propensity score-matched groups (P = 0·704 and P = 0·381 respectively). There was also no significant difference in the early recurrence rate within 2 years after resection between these groups (P = 0·726). Subset analysis of the early recurrence-free survival rate in patients with and without microvascular invasion revealed no significant differences between the groups (P = 0·312 and P = 0·479 respectively). CONCLUSION The resection method had no impact on the risk of HCC recurrence or survival.
Collapse
Affiliation(s)
- S Marubashi
- Department of Surgery, Osaka Medical Centre for Cancer and Cardiovascular Diseases, Osaka, Japan
| | | | | | | | | | | | | | | |
Collapse
|
12
|
Gotoh K, Kariya R, Alam MM, Matsuda K, Hattori S, Maeda Y, Motoyama K, Kojima A, Arima H, Okada S. The antitumor effects of methyl-β-cyclodextrin against primary effusion lymphoma via the depletion of cholesterol from lipid rafts. Biochem Biophys Res Commun 2014; 455:285-9. [PMID: 25446086 DOI: 10.1016/j.bbrc.2014.11.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [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: 10/29/2014] [Accepted: 11/05/2014] [Indexed: 12/17/2022]
Abstract
Primary effusion lymphoma (PEL) is a subtype of aggressive and chemotherapy-resistant non-Hodgkin lymphoma that occurs predominantly in patients with advanced AIDS. In this study, we examined the antitumor activity of methyl-β-cyclodextrin (M-β-CyD) in vitro and in vivo. M-β-CyD quickly induced caspase-dependent apoptosis in PEL cells via cholesterol depletion from the plasma membrane. In a PEL xenograft mouse model, M-β-CyD significantly inhibited the growth and invasion of PEL cells without apparent adverse effects. These results strongly suggest that M-β-CyD has the potential to be an effective antitumor agent against PEL.
Collapse
Affiliation(s)
- Kumiko Gotoh
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan; Radioisotope Center, Institute of Resource Development and Analysis (IRDA), Kumamoto University, Kumamoto, Japan
| | - Ryusho Kariya
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | - Md Masud Alam
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | - Kouki Matsuda
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | - Shinichiro Hattori
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | - Yuki Maeda
- Department of Physical Pharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Keiichi Motoyama
- Department of Physical Pharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Akihiro Kojima
- Radioisotope Center, Institute of Resource Development and Analysis (IRDA), Kumamoto University, Kumamoto, Japan
| | - Hidetoshi Arima
- Department of Physical Pharmaceutics, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan.
| |
Collapse
|
13
|
Kariya R, Matsuda K, Gotoh K, Vaeteewoottacharn K, Hattori S, Okada S. Establishment of nude mice with complete loss of lymphocytes and NK cells and application for in vivo bio-imaging. In Vivo 2014; 28:779-784. [PMID: 25189889] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND Nude mice are used in human xenograft research; however, only 25-35% of human tumors have been successfully transplanted into nude mice and their application is limited due to high natural killer (NK) cell activity. More severely immunodeficient mice with loss of NK activity are needed to overcome this limitation. MATERIALS AND METHODS Balb/c nude Rag-2(-/-)Jak3(-/-) (Nude-RJ) mice were established by crossing Rag-2(-/-)Jak3(-/-) mice and nude mice. The K562 cell line was implanted subcutaneously to compare tumorigenicity between Nude-RJ mice and Nude mice. The cholangiocarcinoma mCherry expressing cell line (KKU-M213) was implanted subcutaneously, and fluorescence intensity and tumor weight were measured. RESULTS Nude R/J mice showed complete loss of lymphocytes and NK cells. Xeno-transplantation of K562 cells showed higher proliferation in Nude R/J mice than nude mice. Subcutaneously-transplanted mCherry-transduced KKU-M213 cells were successfully detected with a fluorescence imager. CONCLUSION Nude-R/J mice are valuable tools for in vivo imaging studies in biomedical research.
Collapse
Affiliation(s)
- Ryusho Kariya
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | - Kouki Matsuda
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | - Kumiko Gotoh
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | | | - Shinichiro Hattori
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| | - Seiji Okada
- Division of Hematopoiesis, Center for AIDS Research, Kumamoto University, Kumamoto, Japan
| |
Collapse
|
14
|
Mukasa A, Aihara K, Gotoh K, Saito K, Nagae G, Tsuji S, Tatuno K, Yamamoto S, Takayanagi S, Narita Y, Shibui S, Aburatani H, Saito N. FREQUENT H3F3A K27M MUTATIONS IN THALAMIC GLIOMAS FROM YOUNG ADULT PATIENTS. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou206.33] [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: 11/13/2022] Open
|
15
|
Ogura I, Kotake M, Hashimoto N, Gotoh K, Kishimoto A. Release characteristics of single-wall carbon nanotubes during manufacturing and handling. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/429/1/012057] [Citation(s) in RCA: 6] [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: 11/11/2022]
|
16
|
Gotoh K, Masaki T, Chiba S, Ando H, Fujiwara K, Shimasaki T, Mitsutomi K, Katsuragi I, Kakuma T, Sakata T, Yoshimatsu H. Hypothalamic brain-derived neurotrophic factor regulates glucagon secretion mediated by pancreatic efferent nerves. J Neuroendocrinol 2013; 25:302-11. [PMID: 23157205 DOI: 10.1111/jne.12003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 10/18/2012] [Accepted: 11/10/2012] [Indexed: 01/10/2023]
Abstract
Understanding the molecular mechanism of the regulation of glucagon secretion is critical for treating the dysfunction of α cells observed in diabetes. Glucagon-like peptide (GLP)-1 analogues reduce plasma glucagon and are assumed to contribute to their action to lower blood glucose. It has previously been demonstrated that the central administration of brain-derived neurotrophic factor (BDNF) improves glucose metabolism by a mechanism independent of feeding behaviour in obese subjects. Using male rats, we examined whether BDNF influences glucagon secretion from α cells via the the central nervous system. We investigate whether: (i) the central infusion of BDNF stimulates glucagon and/or insulin secretion via the pancreatic efferent nerve from the hypothalamus; (ii) the intraportal infusion of GLP-1 regulates glucose metabolism via the central and peripheral nervous system; and (iii) BDNF receptor and/or BDNF-positive fibres are localised near α cells of islets. The portal glucagon level decreased with the central administration of BDNF (n = 6, in each; P < 0.05); in contrast, there was no significant change in portal insulin, peripheral glucagon and insulin levels with the same treatment. This reduction of glucagon secretion was abolished by pancreatic efferent denervation (n = 6, in each; P < 0.05). In an immunohistochemical study, pancreatic α cells were stained specifically with BDNF and tyrosine-related kinase B, a specific receptor for BDNF, and α cells were also co-localised with BDNF. Moreover, intraportal administration of GLP-1 decreased glucagon secretion, as well as blood glucose, whereas it increased the BDNF content in the pancreas; these effects were inhibited with the central infusion of BDNF antibody (n = 6, in each; P < 0.05). BDNF and GLP-1 affect glucose metabolism and modulate glucagon secretion from pancreatic α cells via the central and peripheral nervous systems.
Collapse
Affiliation(s)
- K Gotoh
- Department of Internal Medicine 1, Faculty of Medicine, Oita University, Yufu, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Gotoh K, Inoue M, Masaki T, Chiba S, Shiraishi K, Shimasaki T, Matsuoka K, Ando H, Fujiwara K, Fukunaga N, Aoki K, Nawata T, Katsuragi I, Kakuma T, Seike M, Yoshimatsu H. Obesity-related chronic kidney disease is associated with spleen-derived IL-10. Nephrol Dial Transplant 2012; 28:1120-30. [DOI: 10.1093/ndt/gfs440] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
|
18
|
Okuchi S, Okada T, Ihara M, Gotoh K, Kido A, Fujimoto K, Yamamoto A, Kanagaki M, Tanaka S, Takahashi R, Togashi K. Visualization of lenticulostriate arteries by flow-sensitive black-blood MR angiography on a 1.5 T MRI system: a comparative study between subjects with and without stroke. AJNR Am J Neuroradiol 2012; 34:780-4. [PMID: 23064597 DOI: 10.3174/ajnr.a3310] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The branches of the LSA are the main causative arteries for lacunar infarction, though the vascular changes are largely unknown. Herein, we examined the correlation of LSA imaging findings in patients with lacunar infarction compared with controls by using FSBB-MRA. MATERIALS AND METHODS Fifteen patients (9 men, 6 women; mean age, 73 years) with infarction at the basal ganglia and/or its vicinity were prospectively enrolled, and 12 aged-matched control subjects (6 men, 6 women; mean age, 68 years) were examined by using FSBB-MRA on a 1.5T MR imaging system. Total number and length of visualized LSA branches were compared by a 2-tailed 2-sample t test. Stepwise multiple regression analyses were performed, including hypertension, hyperlipidemia, smoking history, and diabetes mellitus after evaluation of their colinearity. P<.05 after correction for multiple comparisons was considered significant. RESULTS Patients with stroke had significantly fewer LSA branches (average, 6.3; 95% CI, 5.4-7.1) than controls (8.7; 95% CI, 7.8-9.5) (P=.0003). The total LSA lengths were 117 mm (95% CI, 96-138 mm) for patients with stroke and 162 mm (95% CI, 133-91 mm) for control subjects (P=.01). In stepwise multiple regression analysis, only the LSA branch numbers were significantly related to infarction (P=.0003), while only hypertension was significantly related to total LSA length (P=.0085). CONCLUSIONS Using FSBB-MRA to visualize LSA branches, we found a significant reduction in the numbers of LSA branches in patients with stroke, and hypertension was inversely related to total LSA length. FSBB is a promising method to investigate the LSA by using 1.5T MR imaging.
Collapse
Affiliation(s)
- S Okuchi
- Department of Diagnostic Radiology, Translational Research Center, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
19
|
Gotoh K, Okada T, Satogami N, Yakami M, Takahashi JC, Yoshida K, Ishii A, Tanaka S, Miyamoto S, Togashi K. Evaluation of CT angiography for visualisation of the lenticulostriate artery: difference between normotensive and hypertensive patients. Br J Radiol 2012; 85:e1004-8. [PMID: 22744324 DOI: 10.1259/bjr/67294268] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE High-resolution CT angiography (CTA) is currently available using multidetector row CT (MDCT); however, its use for small artery visualisation has been limited. To evaluate its capability, we investigated CTA visualisation for difference in number of the lenticulostriate artery (LSA) branches between normotensive and hypertensive patients, because hypertension is a major cause of LSA damage. METHODS This was a retrospective study evaluating cerebrovascular CTA at our hospital conducted from February 2008 to June 2009 under approval of the institutional review board. 117 patients (39 males and 78 females, 19-88 years old) were included. CTA was conducted using a 64 channel MDCT. Total numbers of LSA branches were examined for differences by age with regression analysis and the presence or absence of hypertension and/or aneurysm using two-sample t-tests. A p-value <0.016 was considered statistically significant after correction for multiple comparisons. A multiple variable analysis of three factors was also conducted. RESULTS The average number of LSA branches was 3.6 [95% confidence interval (CI) 3.0-4.1] and 4.4 (95% CI 4.1-4.7), respectively, for a patient with and without history of hypertension, and the difference was statistically significant (p=0.013). The difference was approximately one branch in the multiple variable analysis. No significant correlation was observed for age and no significant difference was observed for the presence or absence of aneurysms. CONCLUSIONS Contrast-enhanced CTA can visualise significant differences in the number of LSA branches among patients with and without hypertension. Advances in knowledge Current high-resolution CTA can visualise LSA well, which enables finding a difference in the LSA between normotensive subjects and hypertensive patients.
Collapse
Affiliation(s)
- K Gotoh
- Department of Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Yano M, Motoori M, Tanaka K, Kishi K, Miyashiro I, Shingai T, Gotoh K, Noura S, Takahashi H, Yamada T, Ohue M, Ohigashi H, Ishikawa O. Prevention of gastroduodenal content reflux and delayed gastric emptying after esophagectomy: gastric tube reconstruction with duodenal diversion plus Roux-en-Y anastomosis. Dis Esophagus 2012; 25:181-7. [PMID: 21819481 DOI: 10.1111/j.1442-2050.2011.01229.x] [Citation(s) in RCA: 10] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Reflux of gastroduodenal contents and delayed gastric emptying are the most common and serious problems after esophagectomy with gastric reconstruction. However, attempts to reduce the above symptoms, surgically as well as non-surgically, had no or limited effect. To address this issue, we performed retrosternal gastric reconstruction with duodenal diversion plus Roux-en-Y anastomosis (RY) in eight patients with thoracic esophageal cancer and compared the outcomes with control patients who underwent standard reconstruction. The procedure is simple, safe, and not associated with any postoperative complications. The pancreatic amylase concentrations in the gastric juice samples on postoperative day 2 were slightly lower in the non-RY group than in the RY group (1884 ± 2152 vs. 25,790 ± 23,542IU/mL, respectively, P= 0.07). Postoperative endoscopic examination showed neither reflux esophagitis nor residual gastric content in the RY group. Quality of life assessed by the Dysfunction After Upper Gastrointestinal Surgery-32 questionnaire postoperatively was significantly better in the RY group than in the non-RY group for 'decreased physical activity,''symptoms of reflux,''nausea and vomiting,' and 'pain.' The results of this pilot study suggest that gastric reconstruction with duodenal diversion plus RY seems effective in improving both the reflux and delayed gastric emptying. The benefits of this procedure need to be further assessed in a large-scale, randomized controlled trial.
Collapse
Affiliation(s)
- M Yano
- Department of Surgery, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Tanaka K, Yano M, Motoori M, Doki Y, Kishi K, Miyashiro I, Shingai T, Gotoh K, Noura S, Takahashi H, Ohue M, Yamada T, Ohigashi H, Ishikawa O. The significance of abdominal para-aortic lymph node metastasis in patients with lower thoracic esophageal cancer. Dis Esophagus 2012; 25:146-52. [PMID: 21762280 DOI: 10.1111/j.1442-2050.2011.01222.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Para-aortic lymph node (PALN) recurrence is often seen in patients with lower thoracic esophageal cancer treated by esophagectomy with extended lymph node dissection. However, the clinicopathological characteristics of patients with PALN metastasis and the significance of PALN dissection are unknown. A total of 283 patients with lower thoracic esophageal cancer underwent esophagectomy with lymphadenectomy at our hospital between April 1984 and March 2007. Among these 283 patients, 60 patients were enrolled in this retrospective study according to following criteria: (i) clinical T2 to T4 tumor, (ii) no clinical PALN metastasis, and (iii) received PALN dissection. PALN dissection was indicated by a tumor depth of at least T2 and no severe complications. The clinicopathological data, recurrence pattern, and overall survival were compared between patients with PALN and without PALN metastasis. The mean length of surgery was 587 min and the mean blood loss was 1383 mL. The morbidity was 33.3% and mortality was 5% in this series. Sixteen patients (26.7%) had PALN metastasis; these showed significantly more lymph node metastases (15.8 ± 13.2 vs. 3.0 ± 3.2, P < 0.0001) and significantly worse survival rates (53.3% vs. 79.9% at 1 year, 6.7% vs. 62.0% at 3 years, P < 0.0001) than patients without PALN metastasis. The incidence of lymph node recurrence (P < 0.0001) and hematogenous recurrence (P= 0.0487) was also higher in patients with PALN metastasis than in patients without PALN metastasis. Among the 16 patients with PALN metastasis, a univariate analysis revealed total number of metastatic nodes < 8 (P= 0.0325) to be a significant prognostic factor. A multivariate logistic regression analysis of the regional lymph nodes identified the invasion of the lower mediastinal nodes (hazard ratio = 6.120) and retroperitoneal nodes (hazard ratio = 15.167) to be significantly correlated with PALN metastasis. PALN metastasis is suggested to be related to the systemic spread of lymphatic metastasis even in lower thoracic esophageal cancer. PALN dissection for pathological PALN(+) patients should not be performed. It remains to be determined in future prospective studies whether patients without pathological PALN metastasis, but showing PALN micrometastasis, could achieve improved survival with PALN dissection.
Collapse
Affiliation(s)
- K Tanaka
- Department of Surgery, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Matsuyama S, Tokai Y, Ishii K, Yamazaki H, Gotoh K, Satoh T, Sugimoto A, Yamamoto K, Oikawa M, Iwasaki S, Orihara H, Jon GC, Nakamura E, Futatsugawa S, Sera K. AN ATTEMPT TO DETERMINE POSITIONS OF AEROSOL SOURCE BY THE PIXE ANALYSIS. ACTA ACUST UNITED AC 2011. [DOI: 10.1142/s0129083599000097] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Aerosols were continuously collected for 2 or 3 hours during the periods of 4-27 August 1997 and of 23 March-2 April 1998 at a suburb of Sendai City (east 10 km from Sendai), and meteorological data such as wind directions, wind velocities, etc were measured at the same time. The collected aerosol samples were analyzed by the particle-induced X-ray emission (PIXE) method. Fourteen elements (S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Hg and Pb) were contained in these samples. The elemental concentrations increased in the daytime and decreased at night. It coincided with the time variation of people movement. The concentrations of Mn, Fe, Zn and Pb elements depended strongly on the direction of wind and their distributions for wind directions reflected to the position of aerosol sources. This result suggests that the position of aerosol source can be determined by measuring aerosols and wind directions at the many positions.
Collapse
Affiliation(s)
- S. Matsuyama
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - Y. Tokai
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - K. Ishii
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - H. Yamazaki
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - K. Gotoh
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - T. Satoh
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - A. Sugimoto
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - K. Yamamoto
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - M. Oikawa
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - S. Iwasaki
- Department of Quantum Science and Energy Engineering, Tohoku University, Sendai 980-8579, Japan
| | - H. Orihara
- Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578, Japan
| | - G. C. Jon
- Institute of Physics, Academia Sinica, Taipei 11529, Taiwan, ROC
| | - E. Nakamura
- Miyagi Prefectural Institute of Public Health and Environment, Sendai 983-0836, Japan
| | - S. Futatsugawa
- Nishina Memorial Cyclotron Center, Japan Radioisotope Association, Takizawa, Iwate 020-0173, Japan
| | - K. Sera
- Department of Cyclotron Research Center, Iwate Medical University, Takizawa, Iwate 020-0173, Japan
| |
Collapse
|
23
|
Yamauchi Y, Gotoh K, Nobuta Y, Hino T, Suzuki S, Akiba M. Deuterium retention and desorption behavior of reduced activated ferritic steel with surface damage due to high energy helium ion irradiation. Fusion Engineering and Design 2010. [DOI: 10.1016/j.fusengdes.2010.06.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
24
|
Shiraishi Y, Gotoh K, Towata T, Shimasaki T, Suzu S, Kojima A, Okada S. Therapeutic effects of γ-irradiation in a primary effusion lymphoma mouse model. Exp Ther Med 2010; 1:79-84. [PMID: 23136597 DOI: 10.3892/etm_00000014] [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] [Received: 08/27/2009] [Accepted: 10/27/2009] [Indexed: 12/11/2022] Open
Abstract
Primary effusion lymphoma (PEL) is a unique and recently identified non-Hodgkin's lymphoma in immunocompromised individuals. PEL is caused by the Kaposi sarcoma-associated herpes virus/human herpes virus 8 (KSHV/HHV-8) and has a peculiar presentation involving liquid growth in the serous body cavity, chemotherapy resistance and poor prognosis. In search of a new therapeutic modality for PEL, we examined the effect of γ-irradiation on PEL-derived cell lines (BCBL-1, BC-1, and BC-3) in vitro and in vivo. An MTT assay and trypan blue exclusion assay revealed that irradiation significantly suppressed cell proliferation in the PEL cell lines in a dose-dependent manner, and induced apoptosis. The PEL cell lines were relatively radiosensitive compared with other hematological tumor cell lines (Raji, Jurkat, and K562 cells). Inoculation of the BC-3 cell line into the peritoneal cavity of Rag2/Jak3 double-deficient mice led to massive ascites formation, and subcutaneous injection of BCBL-1 led to solid lymphoma formation. Total body irradiation (4 Gy × 2) with bone marrow transplantation resulted in the complete recovery of both types of PEL-inoculated mice. These results suggest that total body irradiation with bone marrow transplantation can be successfully applied for the treatment of chemotherapy-resistant PEL.
Collapse
Affiliation(s)
- Yoshioki Shiraishi
- Division of Hematopoiesis, Center for AIDS Research; ; Radioisotope Center, Institute of Resource Development and Analysis, Kumamoto University, Kumamoto 860-0811, Japan
| | | | | | | | | | | | | |
Collapse
|
25
|
Oshitani J, Hatai I, Yoshida M, Gotoh K. Effects of Fe-AOT complex on the properties of iron oxide particles formed by an AOT isooctane/water emulsion system. ASIA-PAC J CHEM ENG 2008. [DOI: 10.1002/apj.143] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
26
|
Hamada N, Gotoh K, Hara K, Iwahashi J, Imamura Y, Nakamura S, Taguchi C, Sugita M, Yamakawa R, Etoh Y, Sera N, Ishibashi T, Chijiwa K, Watanabe H. Nosocomial outbreak of epidemic keratoconjunctivitis accompanying environmental contamination with adenoviruses. J Hosp Infect 2008; 68:262-8. [PMID: 18289721 DOI: 10.1016/j.jhin.2007.12.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2007] [Accepted: 12/20/2007] [Indexed: 11/28/2022]
Abstract
An outbreak of acute keratoconjunctivitis involving 27 patients occurred in the Department of Ophthalmology, Kurume University Hospital. Adenoviral DNA was detected in four inpatients, one outpatient and one healthcare worker. Sequence-based typing of adenoviral DNA indicated serotype 3 from one inpatient, the rest being serotype 37. At a later stage of the outbreak adenoviral DNA types 37 and/or 3 were also detected from almost all environmental instruments and commonly used eye drops, despite thorough disinfection of the environment and enforcement of various infection control measures. The detection rate of adenoviral DNA in environmental swabs was 81%. A further second disinfection of the environment reduced the detection rate of adenoviral DNA to 38%. The outbreak ceased after closing the ophthalmology ward and outpatient consulting room, accompanied by enhanced cleaning of environmental instruments and the introduction of disposable eye drops for individual patients.
Collapse
Affiliation(s)
- N Hamada
- Division of Infectious Diseases, Department of Infectious Medicine, Kurume University School of Medicine, Kurume, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Gotoh K, Qin L, Watanabe H, Watanabe K, Anh D, Huong P, Anh N, Cat N, Ha L, Ai L, Tien N, Minh T, Oishi K. Prevalence of Haemophilus influenzae with resistant genes isolated from young children with acute lower respiratory tract infections in Nha Trang, Vietnam. J Infect Chemother 2008; 14:349-53. [DOI: 10.1007/s10156-008-0632-1] [Citation(s) in RCA: 9] [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] [Received: 02/25/2008] [Accepted: 06/27/2008] [Indexed: 11/28/2022]
|
28
|
Mochizuki H, Gotoh K, Hieda K, Kobukata Y, Hiromoto N, Kiriu H. POS-02.25: Combined intra-arterial chemotherapy and radiotherapy for treatment of invasive bladder cancer. Urology 2007. [DOI: 10.1016/j.urology.2007.06.765] [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]
|
29
|
Marubashi S, Dono K, Sugita Y, Asaoka T, Hama N, Gotoh K, Miyamoto A, Takeda Y, Nagano H, Umeshita K, Monden M. Alpha-fetoprotein mRNA Detection in Peripheral Blood for Prediction of Hepatocellular Carcinoma Recurrence After Liver Transplantation. Transplant Proc 2006; 38:3640-2. [PMID: 17175354 DOI: 10.1016/j.transproceed.2006.10.067] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2006] [Indexed: 11/24/2022]
Abstract
The aim of this study was to assess the value of alphafeto protein (AFP) mRNA-expressing cells detected in peripheral blood for predicting tumor recurrence after living donor liver transplantation (LDLT) in patients with hepatocellular carcinoma (HCC). The test group consisted of 25 patients who underwent LDLT for end-stage liver disease with HCC while the control group consisted of 37 living donors. Quantitative real-time reverse-transcriptase polymerase chain reaction was used for detection of AFP mRNA-expressing cells in peripheral blood. Nine (36%) of 25 patients developed tumor recurrences (four lung; one liver; one peritoneum; two bone; one adrenal gland) during the follow-up period. Perioperatively, AFP mRNA was positive in peripheral blood of eight patients (32.0%) but only in 1 (2.7%) of the control. Preoperative AFP mRNA was positive in three cases. Univariate analyses revealed that preoperative and perioperative AFP mRNA and microscopical vascular invasion were the significant predictors for HCC recurrence (P = .007, .037, and .005, respectively). In the patients with HCC exceeding Milan criteria (n = 15), the presence of AFP mRNA-positive cells in the peripheral blood correlated significantly with HCC recurrence (P = .033). We concluded that the presence of AFP mRNA-expressing cells could be a useful predictor of HCC recurrence in liver transplant patients.
Collapse
Affiliation(s)
- S Marubashi
- Department of Surgery and Clinical Oncology, Osaka University Graduate School of Medicine, Osaka, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Marubashi S, Dono K, Asaoka T, Hama N, Gotoh K, Miyamoto A, Takeda Y, Nagano H, Umeshita K, Monden M. Risk factors for graft dysfunction after adult-to-adult living donor liver transplantation. Transplant Proc 2006; 38:1407-10. [PMID: 16797318 DOI: 10.1016/j.transproceed.2006.02.091] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2005] [Indexed: 02/07/2023]
Abstract
The aim of this study was to investigate the risk factors for graft dysfunction after adult-to-adult living donor liver transplantation (LDLT). Thirty-nine adults with chronic cirrhosis underwent LDLT between 1999 and 2004. Their postoperative courses were uneventful with no vascular or bile duct complications early after LDLT, except one mild hepatic artery stenosis. The preoperative MELD scores were significantly higher in the failed graft group (n=5) than the functioning graft group (n=34; P=.004), while the graft liver weight/standard liver volume ratio was similar between these groups. We concluded that a high preoperative MELD score was associated with postoperative graft failure and that graft size had little impact on graft outcome. Although large grafts would seem intuitively more suitable for sick recipients, we did not show a benefit among this cohort; the MELD score was the best predictor, a finding that is also most consistent with donor safety.
Collapse
Affiliation(s)
- S Marubashi
- Department of Surgery and Clinical Oncology, Osaka University, Graduate School of Medicine, Osaka, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Masunaga S, Nagasawa H, Gotoh K, Uto Y, Sakurai Y, Hori H, Nagata K, Suzuki M, Maruhashi A, Kinashi Y, Ono K. 236 Evaluation of bioreductive agent-sodium borocaptate-10b hybrid compounds, as 10B-carriers in boron neutron capture therapy. Radiother Oncol 2006. [DOI: 10.1016/s0167-8140(06)80713-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Aiba Y, Yamazaki T, Okada T, Gotoh K, Sanjo H, Ogata M, Kurosaki T. BANK Negatively Regulates Akt Activation and Subsequent B Cell Responses. Immunity 2006; 24:259-68. [PMID: 16546095 DOI: 10.1016/j.immuni.2006.01.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [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: 09/07/2005] [Revised: 12/21/2005] [Accepted: 01/12/2006] [Indexed: 12/15/2022]
Abstract
BANK is an adaptor protein that is highly expressed in B cells. To investigate its physiological role, we generated BANK-deficient mice. BANK-deficient mice displayed enhanced germinal center formation and IgM production in response to T-dependent antigens, whereas this phenotype was blocked in CD40-BANK double knockout mice. Involvement of BANK in CD40 signaling was further demonstrated by in vitro analysis. CD40-mediated proliferation and survival were significantly increased in BANK-deficient B cells, with enhanced Akt activation, whereas introduction of dominant-negative Akt into BANK-deficient B cells suppressed the augmented CD40-mediated responses. Together, our findings suggest that BANK attenuates CD40-mediated Akt activation, thereby preventing hyperactive B cell responses.
Collapse
Affiliation(s)
- Yuichi Aiba
- Laboratory for Lymphocyte Differentiation, RIKEN Research Center for Allergy and Immunology, Tsurumi-ku, Yokohama, Kanagawa 230-0045, Japan
| | | | | | | | | | | | | |
Collapse
|
33
|
Furuuchi M, Gotoh K, Kanaoka C. The influence of humidity on dry separation of granular particles based on geometrical characteristics. POWDER TECHNOL 2005. [DOI: 10.1016/j.powtec.2005.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
34
|
Taki W, Gotoh K, Hyodo A, Hyogo T, Kinugasa K, Koike T, Konishi Y, Negoro M, Nemoto S, Niimi K, Satoh K, Sonobe M, Takahashi A, Terada T. Editorial: The First Specialist Qualification Examination of the Japanese Society of Intravascular Neurosurgery (JSIN). Interv Neuroradiol 2004; 8:343-5. [PMID: 20594495 DOI: 10.1177/159101990200800403] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2002] [Accepted: 10/12/2002] [Indexed: 11/16/2022] Open
Affiliation(s)
- W Taki
- The office for the Specialist Qualification System of the JSI, Department of Neurosurgery, Mie University, Medical School Mie Prefecture, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Uyeda S, Hayakawa M, Nagao T, Molchanov O, Hattori K, Orihara Y, Gotoh K, Akinaga Y, Tanaka H. Electric and magnetic phenomena observed before the volcano-seismic activity in 2000 in the Izu Island Region, Japan. Proc Natl Acad Sci U S A 2002; 99:7352-5. [PMID: 12032286 PMCID: PMC124234 DOI: 10.1073/pnas.072208499] [Citation(s) in RCA: 146] [Impact Index Per Article: 6.6] [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
Significant anomalous changes in the ultra low frequency range (approximately 0.01 Hz) were observed in both geoelectric and geomagnetic fields before the major volcano-seismic activity in the Izu Island region, Japan. The spectral intensity of the geoelectric potential difference between some electrodes on Niijima Island and the third principal component of geomagnetic field variations at an array network in Izu Peninsula started to increase from a few months before the onset of the volcano-seismic activity, culminating immediately before nearby magnitude 6 class earthquakes. Appearance of similar changes in two different measurements conducted at two far apart sites seems to provide information supporting the reality of preseismic electromagnetic signals.
Collapse
Affiliation(s)
- S Uyeda
- Riken International Frontier Research Group on Earthquakes, Earthquake Prediction Research Center, Tokai University, 3-20-1, Orido, Shimizu 424-8610, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
36
|
|
37
|
Mori Y, Wakamori M, Miyakawa T, Hermosura M, Hara Y, Nishida M, Hirose K, Mizushima A, Kurosaki M, Mori E, Gotoh K, Okada T, Fleig A, Penner R, Iino M, Kurosaki T. Transient receptor potential 1 regulates capacitative Ca(2+) entry and Ca(2+) release from endoplasmic reticulum in B lymphocytes. J Exp Med 2002; 195:673-81. [PMID: 11901194 PMCID: PMC2193746 DOI: 10.1084/jem.20011758] [Citation(s) in RCA: 151] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Capacitative Ca(2+) entry (CCE) activated by release/depletion of Ca(2+) from internal stores represents a major Ca(2+) influx mechanism in lymphocytes and other nonexcitable cells. Despite the importance of CCE in antigen-mediated lymphocyte activation, molecular components constituting this mechanism remain elusive. Here we demonstrate that genetic disruption of transient receptor potential (TRP)1 significantly attenuates both Ca(2+) release-activated Ca(2+) currents and inositol 1,4,5-trisphosphate (IP(3))-mediated Ca(2+) release from endoplasmic reticulum (ER) in DT40 B cells. As a consequence, B cell antigen receptor-mediated Ca(2+) oscillations and NF-AT activation are reduced in TRP1-deficient cells. Thus, our results suggest that CCE channels, whose formation involves TRP1 as an important component, modulate IP(3) receptor function, thereby enhancing functional coupling between the ER and plasma membrane in transduction of intracellular Ca(2+) signaling in B lymphocytes.
Collapse
Affiliation(s)
- Yasuo Mori
- Center for Integrative Bioscience, Department of Information Physiology, National Institute for Physiological Sciences, Myodaiji-cho, Okazaki 444-8585, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Abstract
BCAP was recently cloned as a binding molecule to phosphoinositide 3-kinase (PI3K). To investigate the role of BCAP, mutant mice deficient in BCAP were generated. While BCAP-deficient mice are viable, they have decreased numbers of mature B cells and B1 B cell deficiency. The mice produce lower titers of serum immunoglobulin (Ig)M and IgG3, and mount attenuated responses to T cell--independent type II antigen. Upon B cell receptor cross-linking, BCAP-deficient B cells exhibit reduced Ca(2+) mobilization and poor proliferative responses. These findings demonstrate that BCAP plays a pivotal immunoregulatory role in B cell development and humoral immune responses.
Collapse
Affiliation(s)
- Tetsuo Yamazaki
- Department of Molecular Genetics, Institute for Liver Research, Kansai Medical University, Moriguchi, Osaka, Japan
| | | | | | | | | | | |
Collapse
|
39
|
Tasaki T, Fujii K, Gotoh K, Satoh S, Takadate J, Sasaki S, Tachibana M, Yamamoto K. Significance of platelet-reactive antibody screening for patients facing frequent platelet transfusions. Immunohematology 2002; 18:104-8. [PMID: 15373546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023]
Abstract
It is not clear whether platelet-reactive antibody screening is clinically significant for patients facing frequent platelet transfusions. On the basis of data from 96 patients who had been examined for platelet-reactive antibodies by the mixed passive hemagglutination method for a variety of reasons, we investigated the following three issues retrospectively: (1) the relationship between platelet-reactive antibodies and the occurrence of problems in platelet transfusions, such as refractoriness or nonhemolytic reactions; (2) the influence of a history of transfusion on the production of those antibodies; and (3) the effect of screening for those antibodies on the prompt administration of appropriate platelet components. More than half of the platelet transfusion-related problems were associated with platelet-reactive antibodies. For patients with a history of transfusion, the mean period before a clinical problem occurred with platelet transfusions was 9 days,compared with 66 days for those without such a history. Accordingly, during the period, patients with a history of transfusions received fewer units of platelets and had fewer donor exposures than did patients without such a history. On the other hand, most patients who had been screened in advance for those antibodies received appropriate platelet components without delay, whereas an average of 10 days was needed before those who had not been screened received compatible platelets. The patients who had not been screened were transfused with 68 units of random platelets on average during the period. When frequent platelet transfusions are anticipated, especially for patients with a history of transfusion, screening for platelet-reactive antibodies beforehand would be helpful for prompt administration of appropriate platelets, although problems, such as the cost of those platelets and the burden on donors, remain to be resolved.
Collapse
Affiliation(s)
- T Tasaki
- Division of Blood Transfusion, Iwate Medical University Hospital, 19-1 Uchimaru, Morioka City, Iwate, 020-8505, Japan
| | | | | | | | | | | | | | | |
Collapse
|
40
|
Abstract
Thrombomodulin (TM) and its molecular species have been identified as markers of vascular endothelial cells (EC). In the present study, using high-performance liquid chromatography (HPLC) in 7 normal subjects, 5 chronic glomerulonephritis (GN) patients, and 25 diabetes mellitus (DM) patients, the TM molecular species separated from plasma showed seven heterogeneous fragments of 94, 74, 48, 36, 27, 14, and 12 kDa. Comparing the diabetic patients and healthy subjects, it was found that plasma TM generally, and its 74-kDa molecular species particularly, were increased in diabetic patients and the increase became more apparent as the disease progressed in severity. Comparing the patients with diabetic nephropathy and those with nephritis of the same degree of renal dysfunction, both groups had increased levels of TM, but the distribution of the molecular species differed; that is, the 74-kDa form increased in the diabetic patients and the 12-kDa species increased markedly in the nephritis patients. Glycation of the various TM molecular species increased more in the diabetic patients than in healthy subjects. There was a significantly positive correlation between the HbA(1c) and the 74-kDa TM molecular species in diabetic patients. These findings suggest that a fluctuation in the blood glucose level is significantly related to vascular EC damage in DM.
Collapse
Affiliation(s)
- S Uehara
- Department of Internal Medicine, Ohtaki Onsen Hospital, Ohtaki, Usugun, Hokkaido, Japan
| | | | | |
Collapse
|
41
|
Gotoh K, Nishiura I, Nagata N, Yamamoto A, Kawanishi M, Handa H. [Multiple cerebral tuberculomas presenting with paradoxical expansion: a case report]. No Shinkei Geka 2001; 29:1075-9. [PMID: 11758315] [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: 02/23/2023]
Abstract
A 24-year-old male presented with headache. He had been treated with antituberculous drugs for 19 months. MRI revealed 4 intracranial Gd-DTPA enhanced lesions surrounded by massive edema in the right frontal, both occipital and left basal ganglionic regions. Digital subtraction angiography showed no tumor stain. Two procedures for tumor resection were performed for the right frontal and left occipital regions, the latter of which definitively diagnosed by the polymerase chain reaction method. The tumors were well demarcated, showed a rough surface, and were elastically hard. The two residual lesions responded differently to chemotherapy. The lesion in the right occipital region decreased in size, while the other in the left basal ganglionic region continued to grow gradually 26 months after the antituberculous chemotherapy was started. According to previous reports, treatment should be continued for as long as 12-30 months in cases showing paradoxical expansion. In this case, the left basal ganglionic lesion began to decrease in size after 28 months of administration of anti-tuberculous drugs. We report successful treatment of a case of multiple tuberculomas presenting with paradoxical expansion managed by a combination of surgery and continuous chemotherapy.
Collapse
Affiliation(s)
- K Gotoh
- Division of Neurosurgery, Takeda General Hospital, 28-1 Moriminami-cho, Ishida, Fushimi-ku, Kyoto 601-1415, Japan
| | | | | | | | | | | |
Collapse
|
42
|
Kawada M, Ohno Y, Ri Y, Ikoma T, Yuugetu H, Asai T, Watanabe M, Yasuda N, Akao S, Takemura G, Minatoguchi S, Gotoh K, Fujiwara H, Fukuda K. Anti-tumor effect of gallic acid on LL-2 lung cancer cells transplanted in mice. Anticancer Drugs 2001; 12:847-52. [PMID: 11707653 DOI: 10.1097/00001813-200111000-00009] [Citation(s) in RCA: 119] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We previously reported that gallic acid (3,4,5-trihydroxybenzoic acid), a naturally occurring plant phenol, can induce apoptosis in four kinds of human lung cancer cell lines in vitro. The present study further investigated the in vivo anti-tumor effects of orally administered gallic acid. Gallic acid reduced cell viability of LL-2 mouse lung cancer cells in vitro dose dependently, with a 50% inhibitory concentration (IC50) value of around 200 microM. C57Black mice were transplanted with LL-2 cells, and administered gallic acid (1 mg/ml in drinking water, ad libitum) and/or cisplatin (4 mg/kg i.p. injection, once a week). The average weight of the transplanted tumors, obtained at 29 days after transplantation, in the mice of control, gallic acid-treated cisplatin-treated and cisplatin plus gallic acid-treated groups was 4.02, 3.65, 3.19 and 1.72 g, respectively. The average tumor weight of the mice treated with cisplatin combined with gallic acid was significantly smaller than that of the control group (p<0.05). The amount of apoptotic cells in the tumor tissues of mice treated with gallic acid and/or cisplatin was significantly higher than those of the control mice. Combination of gallic acid and cisplatin increased the tumor cell apoptosis compared with the treatment with cisplatin alone. The present findings suggest that the combination of gallic acid with an anti-cancer drug, including cisplatin, may be an effective protocol for lung cancer therapy.
Collapse
Affiliation(s)
- M Kawada
- Second Department of Internal Medicine, Gifu University School of Medicine, 40 Tsukasa-machi, Gifu 500-8705, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Gotoh K. Selection of long DNA fragments free of repetitive sequences without specific sequence information or locus-specific primers. Anal Biochem 2001; 293:146-9. [PMID: 11373093 DOI: 10.1006/abio.2001.5109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- K Gotoh
- Kazusa DNA Research Institute, Kisarazu, Chiba 292-0812, Japan
| |
Collapse
|
44
|
Tamamura H, Omagari A, Hiramatsu K, Kanamoto T, Gotoh K, Kanbara K, Yamamoto N, Nakashima H, Otaka A, Fujii N. Synthesis and evaluation of bifunctional anti-HIV agents based on specific CXCR4 antagonists-AZT conjugation. Bioorg Med Chem 2001; 9:2179-87. [PMID: 11504655 DOI: 10.1016/s0968-0896(01)00128-6] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have previously found that T140, a 14-amino acid residue peptide, inhibits infection of target cells by T cell-line-tropic strains of HIV-1 (X4-HIV-1) through its specific binding to a chemokine receptor, CXCR4. Here, we report synthesis and evaluation of bifunctional anti-HIV compounds, which are composed of T140 analogues and a reverse transcriptase inhibitor, 3'-azido-3'-deoxythymidine (AZT). Novel conjugated analogues have been proved to have the ability for controlled release of AZT in neutral aqueous media as well as mouse and feline sera, and high selectivity indexes (SIs, 50% cytotoxic concentration/50% effective concentration) caused by a synergistic effect of two different regenerating agents. Thus, these bifunctional compounds have several potential advantages. T140 analogues can possibly work as a carrier of AZT targeting T cells due to their specific affinity for CXCR4 on T cells. A synergistic effect by two types of regenerating agents may enable drug dosage to be reduced, and thus it may effectively suppress toxic side effects and the appearance of drug-resistant virus.
Collapse
Affiliation(s)
- H Tamamura
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Tamamura H, Omagari A, Hiramatsu K, Gotoh K, Kanamoto T, Xu Y, Kodama E, Matsuoka M, Hattori T, Yamamoto N, Nakashima H, Otaka A, Fujii N. Development of specific CXCR4 inhibitors possessing high selectivity indexes as well as complete stability in serum based on an anti-HIV peptide T140. Bioorg Med Chem Lett 2001; 11:1897-902. [PMID: 11459656 DOI: 10.1016/s0960-894x(01)00323-7] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [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: 11/16/2022]
Abstract
We previously reported a truncated polyphemusin peptide analogue, T140, which efficiently inhibits infection of target cells by T-cell line-tropic strains of HIV-1 (X4-HIV-1) through its specific binding to a chemokine receptor, CXCR4. We have found that T140 is not stable in feline serum due to the cleavage of the C-terminal Arg,(14) indispensable for anti-HIV activity. On the other hand, a C-terminally amidated analogue of T140, TZ14004, has been found to be completely stable in incubation in the serum for 2 days. The C-terminal amide is thought to be needed for stability in serum. However, TZ14004 does not have fairly strong anti-HIV activity, but has relatively strong cytotoxicity, probably due to an increase by +1 charge from total +7 charges of T140. In our previous study, the number of total +6 charges seemed to be a suitable balance between activity and cytotoxicity. In this study, we have conducted a double-L-citrulline (Cit)-scanning study on TZ14004 based on the C-terminally amidated form in due consideration of the total net charges in the whole molecule to find novel effective CXCR4 inhibitors, TN14003 ([Cit(6)]-T140 with the C-terminal amide) and TC14012 ([Cit(6), D-Cit(8)]-T140 with the C-terminal amide), which possess high selectivity indexes (SIs) and complete stability in feline serum.
Collapse
Affiliation(s)
- H Tamamura
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, 606-8501, Kyoto, Japan.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Shirataki Y, Tani S, Sakagami H, Satoh K, Nakashima H, Gotoh K, Motohashi N. Relationship between cytotoxic activity and radical intensity of isoflavones from Sophora species. Anticancer Res 2001; 21:2643-8. [PMID: 11724333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Among 11 isoflavones tested, genistein [YS13] produced higher cytotoxic activity against human oral tumor cell lines (HSC-2, HSG) than against normal cells (human gingival fibroblast, HGF), suggesting its tumor-specific action. Electron spin resonance (ESR) spectroscopy showed that YS13 did not produce radical, nor scavenged O2*- generated by hypoxanthine-xanthine oxidase reaction system, suggesting that radical-mediated oxidation mechanism is not be involved in the YS13-induced cytotoxicity. Addition of one prenyl group produced YS18 and YS19 with higher anti-Helicobacter pylori activity. Addition of two prenyl groups produced YS21 with the highest cytotoxic activity but lower tumor-specificity. Since YS21 produced the highest amount of radical and most efficiently scavenged O2*-, this compound may induce cytotoxicity by radical-mediated oxidation mechanism. All isoflavones failed to induce anti-human immunodeficiency virus (HIV) activity. These data suggest the medicinal efficacy of isoflavones.
Collapse
Affiliation(s)
- Y Shirataki
- Faculty of Pharmaceutical Sciences, Josai University, Sakado, Saitama, Japan.
| | | | | | | | | | | | | |
Collapse
|
47
|
Kanbara K, Sato S, Tanuma J, Tamamura H, Gotoh K, Yoshimori M, Kanamoto T, Kitano M, Fujii N, Nakashima H. Biological and genetic characterization of a human immunodeficiency virus strain resistant to CXCR4 antagonist T134. AIDS Res Hum Retroviruses 2001; 17:615-22. [PMID: 11375057 DOI: 10.1089/088922201300119716] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The chemokine receptors CXCR4 and CCR5 are considered to be potential targets for the inhibition of HIV-1 replication. We have reported that T134 and T140 inhibited X4 HIV-1 infection specifically because they acted as CXCR4 antagonists. In the present study, we have generated a T134-resistant virus (trHIV-1(NL4-3)) in a cell culture with gradually increasing concentrations of the compound. The EC(50) of T134 against trHIV-1(NL4-3) recovered after 145 passages was 15 times greater than that against wild-type HIV-1(NL4-3). This adapted virus was resistant to other CXCR4 antagonists, T140, AMD3100, and ALX40-4C, and SDF-1; from 10 to 145 times greater than that against wild-type HIV-1(NL4-3). On the other hand, T134, T140, and ALX40-4C were still active against AMD3100-resistant viruses (arHIV-1(018A)). The trHIV-1(NL4-3) contained the following mutations in the V3 loop of gp120: N269K, Q278T, R279K, A284V, F285L, V286Y, I288T, K290E, N293D, M294I, and Q296K; an insertion of T at 290; and Delta274-275 (SI). In addition, many other mutations were recognized in the V1, V2, and V4 domains. Thus, resistance to T134 may be the consequence of amino acid substitutions in the envelope glycoprotein of X4 HIV-1. The trHIV-1(NL4-3) could not utilize CCR5 as an HIV infection coreceptor, although many amino acid substitutions were recognized. The trHIV-1(NL4-3) acquired resistance to vMIP II, which could inhibit both X4 and R5 HIV-1 infection. However, neither the ligands of CCR5, RANTES, and MIP-1alpha, nor a CCR5 low molecular antagonist, TAK-779, were able to influence the infection of trHIV-1(NL4-3). Those results indicated that alternation of coreceptor usage of trHIV-1(NL4-3) was not induced.
Collapse
Affiliation(s)
- K Kanbara
- Department of Microbiology and Immunology, Kagoshima University Dental School, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Okutani A, Tobe T, Sasakawa C, Nozu R, Gotoh K, Takakura A, Itoh T, Miyamoto Y, Itoh K. Comparison of bacteriological, genetic and pathological characters between Escherichia coli O115a,c:K(B) and Citrobacter rodentium. Exp Anim 2001; 50:183-6. [PMID: 11381624 DOI: 10.1538/expanim.50.183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
Murine pathogenic Escherichia coli O115a,c:K(B) (MPEC) is the causative agent of mouse megaenteron, the pathology of which resembles that of transmissible murine colonic hyperplasia caused by Citrobacter rodentium. We compared their genetic and pathological features to reveal the relationship between these two bacteria. To evaluate the genetic distances, 16S rDNA genes were sequenced and biochemical reactions were tested. Mouse strain susceptibility tests, using CF1 MPEC-susceptible germfree mice and BALB/cA(Jic) resistant mice were performed. MPEC strains and C. rodentium showed more than 99.6% identity by comparison of 16S rDNA gene sequences. All results from biochemical reactions and the mouse strain susceptibility tests were identical. It is proposed that MPEC should be reclassified as C. rodentium.
Collapse
Affiliation(s)
- A Okutani
- Laboratory of Veterinary, Public Health, Graduate School of Agriculture and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-8657
| | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Kanamoto T, Kashiwada Y, Kanbara K, Gotoh K, Yoshimori M, Goto T, Sano K, Nakashima H. Anti-human immunodeficiency virus activity of YK-FH312 (a betulinic acid derivative), a novel compound blocking viral maturation. Antimicrob Agents Chemother 2001; 45:1225-30. [PMID: 11257038 PMCID: PMC90447 DOI: 10.1128/aac.45.4.1225-1230.2001] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [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: 11/20/2022] Open
Abstract
Betulinic acid, a triterpenoid isolated from the methyl alcohol extract of the leaves of Syzigium claviflorum, was found to have a potent inhibitory activity against human immunodeficiency virus type 1 (HIV-1). Betulinic acid derivatives were synthesized to enhance the anti-HIV activity. Among the derivatives, 3-O-(3',3'-dimethylsuccinyl) betulinic acid, designated YK-FH312, showed the highest activity against HIV-induced cytopathic effects in HIV-1-infected MT-4 cells. To determine the step(s) of HIV replication affected by YK-FH312, a syncytium formation inhibition assay in MOLT-4/HIV-1(IIIB) and MOLT-4 coculture, a multinuclear-activation-of-galactosidase-indicator (MAGI) assay in MAGI-CCR5 cells, electron microscopic observation, and a time-of-addition assay were performed. In the syncytium formation inhibition assay or in the MAGI assay for de novo infection, the compound did not show inhibitory effects against HIV replication. Conversely, no virions were detected in HIV-1-infected cell cultures treated with YK-FH312 either by electron microscopic observation or by viral yield in the supernatant. In accordance with a p24 enzyme-linked immunosorbent assay of culture supernatant in the time-of-addition assay, YK-FH312 inhibited virus expression in the supernatant when it was added 18 h postinfection. However, Western blot analysis of the cells in the time-of-addition assay revealed that the production of viral proteins in the cells was not inhibited completely by YK-FH312. These results suggest that YK-FH312 might affect the step(s) of virion assembly and/or budding of virions, and this is a novel mechanism of action of an anti-HIV compound.
Collapse
Affiliation(s)
- T Kanamoto
- Department of Microbiology and Immunology, Kagoshima University Dental School, 8-35-1 Sakuragaoka, Kagoshima 890-8544, Japan
| | | | | | | | | | | | | | | |
Collapse
|
50
|
Funaba M, Yamate T, Narukawa Y, Gotoh K, Iriki T, Hatano Y, Abe M. Effect of supplementation of dry cat food with D,L-methionine and ammonium chloride on struvite activity product and sediment in urine. J Vet Med Sci 2001; 63:337-9. [PMID: 11307939 DOI: 10.1292/jvms.63.337] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Feeding dry foods supplemented with urine acidifier (D,L-methionine (Met) or ammonium chloride) decreased urinary pH and struvite activity product in clinically normal cats. As a result, the number of struvite crystals in urine was greatly reduced. Supplementation with 3% Met but not 1% Met caused decrease in the urinary concentration of sediment, which resulted from a reduction in the HCl-soluble fraction. The concentration of HCl-insoluble sediment was not affected by supplementation with the urine acidifier.
Collapse
Affiliation(s)
- M Funaba
- Laboratory of Nutrition, Azabu University School of Veterinary Medicine, Sagamihara-shi, Japan
| | | | | | | | | | | | | |
Collapse
|