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Ueda T, Murata S, Yasui D, Mine T, Hiranuma C, Kobayashi Y, Tamai J, Yamamoto A, Kumita S. Comparison of miriplatin-lipiodol suspension and cisplatin-lipiodol suspension: the antitumor efficacy and safety of transcatheter arterial chemoembolization for hepatocellular carcinoma. J Vasc Interv Radiol 2014. [DOI: 10.1016/j.jvir.2013.12.370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Shimizu T, Sonoda H, Murata S, Takebayashi K, Ohta H, Miyake T, Mekata E, Shiomi H, Naka S, Tani T. Hyperthermic intraperitoneal chemotherapy using a combination of mitomycin C,5-fluorouracil, and oxaliplatin in patients at high risk of colorectal peritoneal metastasis: A Phase I clinical study. Eur J Surg Oncol 2013; 40:521-528. [PMID: 24388411 DOI: 10.1016/j.ejso.2013.12.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 11/15/2013] [Accepted: 12/05/2013] [Indexed: 01/19/2023] Open
Abstract
INTRODUCTION The drugs and protocols used for hyperthermic intraperitoneal chemotherapy (HIPEC) vary among institutions. Here we show the efficacy of the 3-drug combination of mitomycin C (MMC), 5-fluorouracil (5FU), and oxaliplatin (OHP) in an in vitro simulation of HIPEC and the safety of HIPEC with these drugs during a Phase I study of patients at high risk of developing colorectal peritoneal metastasis. METHODS To simulate HIPEC, we used HCT116 and WiDr cells to assess the growth inhibitory efficacy of MMC 2 μg/mL, 5FU 200 μg/mL, and OHP 40 μg/mL as single drugs or their combination after an exposure time of 30 min at 37 or 42 °C. In addition, nine patients underwent surgical resection of tumors and HIPEC with MMC, 5FU, and an escalating dose of OHP (90/110/130 mg/m²). Dose-limiting toxicity was monitored. RESULTS In the simulation, the 3-drug combination showed marked tumor-suppressive effects compared with those from ten times higher dose of OHP 400 μg/mL, with significant augmentation under hyperthermic conditions. No dose-limiting toxicity occurred in the clinical study. Dose escalation was completed at the final level of OHP. CONCLUSIONS The MMC-5FU-OHP combination showed marked growth inhibition against colorectal cancer cells under hyperthermic conditions in vitro. In the phase I study, the recommended dose of OHP was determined as 130 mg/m² when used with MMC and 5FU; HIPEC using MMC-5FU-OHP appears to be safe and feasible for patients at high risk of colorectal peritoneal metastasis.
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Ooshiro M, Konnai S, Katagiri Y, Afuso M, Arakaki N, Tsuha O, Murata S, Ohashi K. Horizontal transmission of bovine leukemia virus from lymphocytotic cattle, and beneficial effects of insect vector control. Vet Rec 2013; 173:527. [PMID: 24158325 DOI: 10.1136/vr.101833] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Mine T, Murata S, Nakazawa K, Onozawa S, Ueda T, Miyauchi M, Morita S, Kumita S. Glue embolization for gastroduodenal ulcer bleeding: contribution to hemodynamics and healing process. Acta Radiol 2013; 54:934-8. [PMID: 23612428 DOI: 10.1177/0284185113484644] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Although the morbidity of bowel ischemic events after glue embolization has been suggested, a causal relationship between glue and ischemia has not been clearly established. PURPOSE To evaluate the efficiency and safety of transcatheter arterial embolization with n-butyl cyanoacrylate (NBCA-TAE) for upper gastrointestinal hemorrhage (GIH). MATERIAL AND METHODS Between October 2006 and October 2012, 21 patients with upper GIH underwent NBCA-TAE, and endoscopic data were obtained within 30 days of follow-up. Shock index prior to and immediately after NBCA-TAE were compared to determine changes in hemodynamics. Days to Forrest type III, as assessed by follow-up endoscopy, was used as an indicator of the healing process. Other clinical outcomes included days for starting ingestion and for hospital discharge. RESULTS Sixteen gastric and five duodenal ulcers, classified into Forrest type I, were treated. Immediate hemostasis was achieved in all the patients, and no re-bleeding occurred within the follow-up period. Shock index significantly (P < 0.001) improved from before (0.99 ± 0.076) to immediately after NBCA-TAE (0.67 ± 0.038). Sequential mucosal healing processes were observed in all the patients, and the number of days to Forrest type III was 9.6 ± 7.1. The number of days for starting ingestion and hospital discharge was 9.0 ± 4.5 and 15 ± 7.7 days, respectively. CONCLUSION NBCA-TAE is an effective and safe method for the control of nonvariceal upper GIH, in terms of contribution to hemodynamics and healing process of the gastroduodenal mucosa.
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Murata S, Kawabe K, Taura S, Shimogiri T, Okamoto S. Relationship between abdominal fat content and avian uncoupling protein gene expression in skeletal muscle of Japanese quail Coturnix japonica. Br Poult Sci 2013; 54:42-9. [PMID: 23444853 DOI: 10.1080/00071668.2013.764398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
1. The genetic architecture of the avian uncoupling protein (avUCP) was investigated and the relationship between avUCP gene expression and the amount of abdominal fat of Japanese quail was determined by quantitative real-time PCR. 2. The Japanese quail avUCP gene consists of six exons and five introns. Sequences of nucleotides and amino acids were 94·6% and 86·0% identical to those of the chicken avUCP gene, and phylogenetic analysis showed that the Japanese quail avUCP gene consists of the same clusters as the chicken and turkey avUCP. 3. Expression of the avUCP gene was significantly higher in the Pectoralis major (1·28 ± 0·24) than in the Biceps femoris (0·63 ± 0·14). 4. A positive correlation coefficient between the avUCP gene expression in the Pectoralis major and Biceps femoris was observed (r = 0·79, P = 0·02), whereas a negative correlation coefficient was observed between the abdominal fat percentage (AFP) and gene expression in both the Pectoralis major (r = -0·82, P = 0·01) and Biceps femoris (r = -0·61, P = 0·11). 5. The avUCP gene was associated with the accumulation of abdominal fat in Japanese quail and it was concluded that modulation of avUCP gene expression could be utilised to control abdominal fat accumulation in poultry.
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Okamoto Y, Hirota M, Monden Y, Murata S, Koyama C, Mitsudo K, Iwai T, Ishikawa Y, Tohnai I. High-dose zoledronic acid narrows the periodontal space in rats. Int J Oral Maxillofac Surg 2012; 42:627-31. [PMID: 23245701 DOI: 10.1016/j.ijom.2012.11.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2011] [Revised: 08/20/2012] [Accepted: 11/13/2012] [Indexed: 11/27/2022]
Abstract
The aim of this experiment was to evaluate the histological effects of zoledronic acid on the periodontal space in rats. 40 male Wistar rats were divided into three zoledronic acid groups and a control group. Zoledronic acid was injected subcutaneously at doses of 10, 50, or 500 μg/kg once a week for 3 weeks. The rats were killed 1 or 9 weeks after the last injection. Histological examination of the periodontal space around the incisor tooth revealed that zoledronic acid did not inhibit tooth development. In the rats killed 1 week after treatment discontinuation, the periodontal space gradually narrowed in response to increasing zoledronic acid doses, and the changes were statistically significant according to ANOVA but not according to ANOVA with post hoc tests. The changes persisted in the high-dose zoledronic acid group despite zoledronic acid discontinuation, with significant differences identified by ANOVA and ANOVA with post hoc tests. Therefore, although zoledronic acid had an insignificant effect on tooth development, it had a significant effect on the periodontal space when high doses were administered. The results of this experiment may provide useful information for future investigations on the role of zoledronic acid in the osteonecrosis of the jaw.
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Fukushima H, Kawanabe N, Murata S, Ishihara Y, Yanagita T, Balam TA, Yamashiro T. SSEA-4 is a marker of human deciduous periodontal ligament stem cells. J Dent Res 2012; 91:955-60. [PMID: 22895512 DOI: 10.1177/0022034512458123] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Although human deciduous teeth are an ideal source of adult stem cells, no method for identifying deciduous periodontal ligament (D-PDL) stem cells has so far been developed. In the present study, we investigated whether stage-specific embryonic antigen (SSEA)-4 is a marker that could be used to isolate D-PDL stem cells. The isolated D-PDL cells met the minimum criteria for mesenchymal stem cells (MSCs): They showed plastic adherence, specific-surface antigen expression, and multipotent differentiation potential. SSEA-4+ D-PDL cells were detected in vitro and in vivo. A flow cytometric analysis demonstrated that 22.7% of the D-PDL cells were positive for SSEA-4. SSEA-4+ clonal D-PDL cells displayed multilineage differentiation potential: They were able to differentiate into adipocytes, osteoblasts, and chondrocytes in vitro. A clonal assay demonstrated that 61.5% of the SSEA-4+ D-PDL cells had adipogenic, osteogenic, and chondrogenic potential. Our present study demonstrated that SSEA-4+ D-PDL cells are a subset of multipotent stem cells. Hence, SSEA-4 is a specific marker that can be used to identify D-PDL stem cells.
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Ueyama H, Fu KI, Ogura K, Murata S, Miyazaki A. Successful treatment for Cronkhite-Canada syndrome with endoscopic mucosal resection and salazosulfapyridine. Tech Coloproctol 2012; 18:503-7. [DOI: 10.1007/s10151-012-0863-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2011] [Accepted: 07/05/2012] [Indexed: 11/24/2022]
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Suzuki S, Konnai S, Okagawa T, Githaka NW, Kariuki E, Gakuya F, Kanduma E, Shirai T, Ikebuchi R, Ikenaka Y, Ishizuka M, Murata S, Ohashi K. Molecular cloning and characterization of Th1 and Th2 cytokines of African buffalo (Syncerus caffer). Int J Immunogenet 2011; 39:170-82. [PMID: 22117600 DOI: 10.1111/j.1744-313x.2011.01062.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The African buffalo (Syncerus caffer) has been implicated as the reservoir of several bovine infectious agents. However, there is insufficient information on the protective immune responses in the African buffalo, particularly in infected animals. In this study, we analysed Th1 cytokines IL-2 and IFN-γ, and Th2 cytokines IL-4 and IL-10. The cloned cDNA of IL-2, IL-4, IL-10 and IFN-γ contained an open reading frame of 468, 501, 408 and 540 nucleotides, encoding polypeptides of 155, 166, 135 and 179 amino acids, respectively. Nucleotide sequence homology of IL-2, IFN-γ and IL-4 was more than 98% between the African buffalo and cattle, which resulted in identical polypeptides. Meanwhile, IL-10 gene of African buffalo and cattle had 95% homology in nucleotide sequence, corresponding to thirteen amino acid residues substitution. Cysteine residues and potential glycosylation sites were conserved within the family Bovinae. Phylogenetic analyses including cytokines of the African buffalo placed them within a cluster comprised mainly of species belonging to the order Artiodactyla, including cattle, water buffalo, sheep, goat, pig and artiodactyl wildlife. A deeper understanding of the structure of these cytokines will shed light on their protective role in the disease-resistant African buffalo in comparison with other closely related species.
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Miura H, Ueno Y, Hamada S, Murata S, Tsukamoto K. A crystal growth approach for DNA nano-structure formation. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311086430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Horie J, Murata S, Hayashi S, Murata J, Miyazaki J, Mizota K, Horikawa E. Factors That Delay COPD Detection in the General Elderly Population. Respir Care 2011; 56:1143-50. [DOI: 10.4187/respcare.01109] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Murata S, Hashiguchi N, Shimizu M, Endo A, Omura N, Morita E. Skin disorders and the role of dermatologists after the tsunami in Japan. J Eur Acad Dermatol Venereol 2011; 26:923-4. [PMID: 21711469 DOI: 10.1111/j.1468-3083.2011.04168.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sueyoshi T, Ueda M, Jono H, Tasaki M, Murata S, Horibata Y, Obayashi K, Irie H, Sei A, Ide J, Mizuta H, Ando Y. Transthyretin-derived amyloidosis in musculoskeletal systems. Amyloid 2011; 18 Suppl 1:163-5. [PMID: 21838473 DOI: 10.3109/13506129.2011.574354061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Murata S, Ueda M, Tanabe Y, Kurata N, Demura N, Gram H, Tasaki M, Su Y, Jono H, Shono M, Obayashi K, Ando Y. Inhibitory effects of anti-IL-1β antibody in murine AA amyloidosis mode. Amyloid 2011; 18 Suppl 1:38-9. [PMID: 21838425 DOI: 10.3109/13506129.2011.574354013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Osada S, Akiyama M, Takasaki M, Takagawa S, Nakazawa K, Murata S, Sawada Y, Kawana S. Revascularization by percutaneous transluminal angioplasty improved abruptly deteriorated ischaemic symptoms in cutaneous polyarteritis nodosa. Clin Exp Dermatol 2011; 36:502-5. [DOI: 10.1111/j.1365-2230.2011.04050.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Horinaga M, Murata S, Matsushima M, Nakahira Y, Yanaihara H, Ueno M, Asakura H. Use of cytokeratin 18 and EAU score to predict tumor recurrence in patients with non-muscle-invasive bladder cancer following single postoperative immediate intravesical chemotherapy instillation. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.7_suppl.269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
269 Background: We examined the prognostic factors for recurrence after TURBT using molecular markers as well as the scoring system of the EAU. Methods: Eighty-eight patients with primary or recurrent bladder tumors who underwent TURBT followed by the single postoperative immediate instillation of pirarubicin and no further instillations were enrolled between 2003 and 2006; the median follow-up period was 46 months. The time to first recurrence was the primary end point of this study. Patients were divided into EAU recurrence risk groups as follows: low-risk group (total score, 0), intermediate-risk group (total score, 1-9) and high-risk group (total score, 9-17). The intermediate-risk group patients were subdivided into a total score of 1-4 and a total score of 5-9. Immunostaining using Ki-67, pHH3, CK18 and Survivin were performed on the TURBT specimens. Results: According to the risk stratification, 5, 82, and 1 were assigned to the low-, intermediate-, and high-risk recurrence groups, respectively. During the follow-up, recurrences were observed in 0% of the low-risk group, 45% (37 out of 82) in the intermediate-risk group and 100% in the high-risk group. We evaluated various predictors of a recurrence-free outcome among the 82 intermediate-risk patients. In univariate analyses, EAU score (1-4, 32.1% vs 5-9, 62.1%; p = 0.0011), high CK18 expression (negative, 31.4% vs positive 88.8%; p < 0.0001), high Ki-67 index (< 5%, 35.4% vs > 5%, 52.5%; p = 0.017) and high Survivin nuclear staining (< 5%, 35.9% vs > 5%, 62.5%; p = 0.004) were associated with recurrence. In a multivariate analysis, EAU score (HR 2.95, p = 0.003) and a high CK18 immunostaining (HR 6.70, p < 0.0001) were independent predictors of disease recurrence. Conclusions: A single immediate chemotherapy instillation is, by itself, insufficient for the treatment of patients in the intermediate- or high-risk recurrence groups defined by the EAU guidelines. Strong immunohistochemical expression of CK18 and the EAU scoring system appeared to be independent predictors of clinical outcome among patients with urothelial carcinoma of the bladder. No significant financial relationships to disclose.
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Oh KH, Yang SW, Park JM, Seol JH, Iemura S, Natsume T, Murata S, Tanaka K, Jeon YJ, Chung CH. Control of AIF-mediated cell death by antagonistic functions of CHIP ubiquitin E3 ligase and USP2 deubiquitinating enzyme. Cell Death Differ 2011; 18:1326-36. [PMID: 21293491 DOI: 10.1038/cdd.2011.3] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Apoptosis inducing factor (AIF) is a mitochondrial oxidoreductase that scavenges reactive oxygen species under normal conditions. Under certain stresses, such as exposure to N-methyl-N'-nitro-N'-nitrosoguanidine (MNNG), AIF is truncated and released from the mitochondria and translocated into the nucleus, where the truncated AIF (tAIF) induces caspase-independent cell death. However, it is unknown how cells decide to kill themselves or operate ways to survive when they encounter stresses that induce the release of tAIF. Here, we demonstrated that USP2 and CHIP contribute to the control of tAIF stability. USP2 deubiquitinated and stabilized tAIF, thus promoting AIF-mediated cell death. In contrast, CHIP ubiquitinated and destabilized tAIF, thus preventing the cell death. Consistently, CHIP-deficient cells showed an increased sensitivity to MNNG. On the other hand, knockdown of USP2 attenuated MNNG-induced cell death. Moreover, exposure to MNNG caused a dramatic decrease in CHIP level, but not that of USP2, concurrent with cell shrinkage and chromatin condensation. These findings indicate that CHIP and USP2 show antagonistic functions in the control of AIF-mediated cell death, and implicate the role of the enzymes as a switch for cells to live or die under stresses that cause tAIF release.
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Oshiro Y, Sasaki R, Kobayashi A, Murata S, Fukunaga K, Kondo T, Oda T, Ohkohchi N. Prognostic relevance of the lymph node ratio in surgical patients with extrahepatic cholangiocarcinoma. Eur J Surg Oncol 2010; 37:60-4. [PMID: 21094016 DOI: 10.1016/j.ejso.2010.10.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 09/15/2010] [Accepted: 10/26/2010] [Indexed: 02/08/2023] Open
Abstract
AIM Few studies have investigated the influence of the lymph node ratio (LNR), the ratio of the number of lymph nodes harboring metastatic cancer to the total number of lymph nodes removed, on the outcome after surgery for extrahepatic cholangiocarcinoma. This study was conducted to examine the prognostic impact of LNR in patients undergoing resection for extrahepatic cholangiocarcinoma. PATIENTS AND METHODS We retrospectively analyzed a total of 60 consecutive patients who underwent resection for extrahepatic cholangiocarcinoma. We focused on the LNR, which was classified as 0 in 34 patients, between 0 and 0.2 in 13 patients, and greater than 0.2 in 13 patients. RESULTS The overall five-year survival rates for patients with LNRs of 0, 0 to 0.2, and ≥0.2 were 44%, 10%, and 0%, respectively (p = 0.023). LNR was an independent predictive factor for estimated survival by both univariate (p = 0.016) and multivariate (p = 0.022) analyses including LNR, the sites of the primary tumors, and surgical margin as the variables. There were no statistically significant differences between patients who had less than 12 lymph nodes removed and those who had 12 or more lymph nodes removed (p = 0.484). CONCLUSION LNR was a powerful, independent predictor of estimated survival in patients undergoing surgical resection for extrahepatic cholangiocarcinoma. LNR should be considered when stratifying patients for future clinical trials.
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Nagaoka S, Murata S, Kimura K, Mori T, Hojo K. Antimicrobial activity of sodium citrate against Streptococcus pneumoniae and several oral bacteria. Lett Appl Microbiol 2010; 51:546-51. [PMID: 20849395 DOI: 10.1111/j.1472-765x.2010.02932.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS The aim of this study is to assess the antibacterial activity of sodium citrate against Streptococcus pneumoniae and several oral bacteria. METHODS AND RESULTS The antibacterial activity was determined by broth microdilution method. The results showed that although Enterocuccus faecium OB7084 and Klebsiella pneumoniae OB7088 had high tolerance to sodium citrate, several oral bacteria including Fusobacterium nucleatum JCM8532(T) , Streptococcus mutans JCM5705(T) and Strep. pneumoniae NBRC102642(T) were susceptible. Furthermore, the bactericidal activity of sodium citrate against Strep. pneumoniae NBRC102642(T) was not influenced by pH in the range of 5·0-8·0, whereas that of sodium lactate was weakened at neutral or weak alkaline pH. When Strep. pneumoniae NBRC102642(T) was treated with sodium citrate for 2 h, many burst cells were observed. However, addition of MgCl(2) or CaCl(2) to an assay medium weakened the antimicrobial activity although ZnCl(2) or MnCl(2) did not influence. CONCLUSIONS Independent of pH, sodium citrate inhibited the growth of oral bacteria, which suggests that the mechanism is different from that of sodium lactate. SIGNIFICANCE AND IMPACT OF THE STUDY The results presented in this study would be available for understanding the antimicrobial property of sodium citrate.
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Nakagawa R, Murata S, Ashizuka Y, Shintani Y, Hori T, Tsutsumi T. Hexabromocyclododecane determination in seafood samples collected from Japanese coastal areas. CHEMOSPHERE 2010; 81:445-452. [PMID: 20825970 DOI: 10.1016/j.chemosphere.2010.08.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 08/08/2010] [Accepted: 08/09/2010] [Indexed: 05/29/2023]
Abstract
The levels of three hexabromocyclododecane (HBCD) isomers and ΣHBCDs in 54 wild and 11 farmed seafood samples collected from four regions of Japan were determined by LC/MS/MS. For the fish classified as Anguilliformes, Perciformes, Clupeiformes and farmed Salmoniformes, the medians (ranges) of ΣHBCDs are 2.09 (0.05-36.9), 0.75 (ND-26.2), 0.12 (0.09-77.3) and 1.29 (1.09-1.34) ng g(-1)ww, respectively. However, HBCDs were not detected in samples classified as Crustacea, Mollusca, Pleuronectiformes and Scorpaeniformes, or if detected, the levels were very low. The rank correlation between ΣHBCDs (or α-HBCD) and fat content could not be found except for the Japanese sea bass of the Tohoku region. In HBCD isomer profiles, for fish samples above 20 ng g(-1)ww, the trend was found that γ-HBCD was predominant, which suggests the influence of discharge from a nearby industrial plant. In the other wild fish and the farmed fish samples, on the other hand, α-HBCD was mostly predominant, which suggests biomagnification via the food chain. Additionally, to assess the risk to human health, based on the determined HBCD median concentrations for Anguilliformes, farmed Salmoniformes and Perciformes, the daily intake of HBCDs from fish by an average Japanese adult was tentatively calculated to be 3.7, 2.3 and 1.3 ng (kg body weight)(-1) d(-1), respectively.
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Yamada K, Oda T, Hashimoto S, Ohara Y, Kobayashi A, Fukunaga K, Murata S, Sasaki R, Ohkohchi N. Treatment of locally advanced pancreatic cancer with concurrent chemoradiotherapy with gemcitabine: Results from 24 patients treated from 2003-2009. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Hashimoto S, Oda T, Yamada K, Ohara Y, Kobayashi A, Fukunaga K, Murata S, Sasaki R, Ohkohchi N. Effect of continuous adjuvant chemotherapy and protracted treatment on recurrence and survival in resected pancreatic adenocarcinoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Kozuma Y, Ninomiya H, Murata S, Kono T, Mukai HY, Kojima H. The pro-apoptotic BH3-only protein Bim regulates cell cycle progression of hematopoietic progenitors during megakaryopoiesis. J Thromb Haemost 2010; 8:1088-97. [PMID: 20128868 DOI: 10.1111/j.1538-7836.2010.03785.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
SUMMARY BACKGROUND The pro-apoptotic BH3-only protein Bim is recognized as a pivotal regulator of apoptosis induced by the depletion of cytokines. In the present study, we examined the role of Bim in megakaryopoiesis. METHODS Megakaryocyte (MK) progenitors obtained from bim knockout (KO) mice were analyzed in vitro for liability to apoptosis after the depletion of cytokines, ability to differentiate into MKs and proliferation/cell cycle progression in response to thrombopoietin (TPO). The production of platelets in vitro was evaluated by assaying the formation of proplatelets in MKs. Megakaryopoiesis in vivo was observed in a mouse model of thrombocytopenia induced by injecting fluorouracil (5-FU). RESULTS Bim-deficient CD34-/c-kit+/Sca-1+/Lineage- stem cells and MKs were highly resistant to apoptosis induced by cytokine depletion, suggesting that Bim is involved in the apoptotic process in both stem cells and MKs. As bim KO mice exhibited splenomegaly and thrombocytopenia, splenectomized mice were used for experiments in vivo. Platelet recovery after 5-FU-induced thrombocytopenia was significantly delayed in bim KO mice. Corresponding with this, numbers of MKs in the recovery phase bone marrow were significantly reduced in bim KO mice. Culture of c-kit+/Lineage- progenitors with TPO revealed that Bim-deficient cells poorly proliferate and differentiate into CD41+ cells in comparison with wild-type (WT) cells. However, once differentiated into MKs, these cells matured normally. Furthermore, cell cycle analyses demonstrated that transition from the G1 to the S phase was delayed in Bim-deficient stem cells. CONCLUSIONS In the present study, we demonstrated that Bim plays a pivotal role in the regulation of cell cycle progression in hepatopoietic progenitors during megakaryopiesis.
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Tanak Y, Murata S. Measurement of three-dimensional stress field of RP model having a notch by using digital holography. EPJ WEB OF CONFERENCES 2010. [DOI: 10.1051/epjconf/20100630005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Furuita K, Murata S, Jee J, Ichikawa S, Matsuda A, Kojima C. NMR studies of DNA recognition mechanism of HMGB1 protein. ACTA ACUST UNITED AC 2009:89-90. [DOI: 10.1093/nass/nrp045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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