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Kamezaki M, Katano T, Chen K, Ishida T, Sugano S. Preliminary study of a separative shared control scheme focusing on control-authority and attention allocation for multi-limb disaster response robots. Adv Robot 2020. [DOI: 10.1080/01691864.2020.1730238] [Citation(s) in RCA: 2] [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: 10/24/2022]
Affiliation(s)
- Mitsuhiro Kamezaki
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
| | - Takahiro Katano
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
| | - Kui Chen
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
| | - Tatsuzo Ishida
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
| | - Shigeki Sugano
- Research Institute for Science and Engineering, Waseda University, Tokyo, Japan
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Kawano Y, Sanada Y, Urahashi T, Ihara Y, Okada N, Yamada N, Hirata Y, Katano T, Taniai N, Matsuda A, Miyashita M, Yoshida H, Mizuta K. Transition of Spleen Volume Long After Pediatric Living Donor Liver Transplantation for Biliary Atresia. Transplant Proc 2018; 50:2718-2722. [PMID: 30401384 DOI: 10.1016/j.transproceed.2018.03.071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 03/02/2018] [Indexed: 01/10/2023]
Abstract
PURPOSE After undergoing the Kasai procedure for biliary atresia (BA), most patients develop severe splenomegaly that tends to be improved by liver transplantation. However, fluctuations in splenic volume long after transplantation remain to be elucidated. PATIENTS AND METHODS Seventy-one consecutive patients who had undergone pediatric living donor liver transplantation (LDLT) for BA were followed up in our outpatient clinic for 5 years. They were classified into 3 groups according to their clinical outcomes: a good course group (GC, n = 41) who were maintained on only 1 or without an immunosuppressant, a liver dysfunction group (LD, n = 18) who were maintained on 2 or 3 types of immunosuppressants, and a vascular complication group (VC, n = 11). Splenic and hepatic volumes were calculated by computed tomography in 464 examinations and the values compared before and after the treatment, especially in the VC group. RESULTS Splenic volume decreased exponentially in the GC group, with splenic volume to standard spleen volume ratio (SD) being 1.59 (0.33) 5 years after liver transplantation. Splenic volume to standard spleen volume ratios were greater in the VC and LD groups than in the GC group. Patients in the VC group with portal vein stenosis developed liver atrophy and splenomegaly, whereas those with hepatic vein stenosis developed hepatomegaly and splenomegaly. Interventional radiation therapy tended to improve the associated symptoms. CONCLUSIONS Fluctuations in splenic volume long after pediatric LDLT for BA may reflect various clinical conditions. Evaluation of both splenic and hepatic volumes can facilitate understanding clinical conditions following pediatric LDLT.
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Affiliation(s)
- Y Kawano
- Department of Surgery, Nippon Medical School Chiba Hokusou Hospital, Chiba, Japan.
| | - Y Sanada
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - T Urahashi
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Ihara
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - N Okada
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - N Yamada
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Hirata
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - T Katano
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - N Taniai
- Department of Surgery, Nippon Medical School, Tokyo, Japan
| | - A Matsuda
- Department of Surgery, Nippon Medical School Chiba Hokusou Hospital, Chiba, Japan
| | - M Miyashita
- Department of Surgery, Nippon Medical School Chiba Hokusou Hospital, Chiba, Japan
| | - H Yoshida
- Department of Surgery, Nippon Medical School, Tokyo, Japan
| | - K Mizuta
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
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Okada N, Sanada Y, Urahashi T, Ihara Y, Yamada N, Hirata Y, Katano T, Otomo S, Ushijima K, Mizuta K. Endotoxin Metabolism Reflects Hepatic Functional Reserve in End-Stage Liver Disease. Transplant Proc 2018; 50:1360-1364. [PMID: 29705277 DOI: 10.1016/j.transproceed.2018.01.052] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 12/29/2017] [Accepted: 01/23/2018] [Indexed: 01/29/2023]
Abstract
BACKGROUND The hepatic clearance of endotoxin (Et) may reflect hepatic functional reserve and ischemic injury to hepatocytes. Therefore, we examined the relationships between Et activity (EA) and the metrics Pediatric End-Stage Liver Disease (PELD)/Model of End-Stage Liver Disease (MELD) score and alanine transaminase (ALT) levels in the postoperative period. METHODS We performed 8 living-donor liver transplantations (LDLTs) for biliary atresia at our center from April 2012 to December 2012. EA was measured by means of an Et activity assay (EAA) in samples collected from a vein 1 day before LDLT, from the portal vein during the intraoperative anhepatic phase, from an artery 1 hour after reperfusion, from an artery on postoperative day (POD) 1, and from an artery or vein at PODs 7 and 14. RESULTS EAs generally remained at low levels. EA at the reperfusion period was significantly lowest. The correlation coefficient for the preoperative MELD/PELD score and the EAA was 0.837, and the corresponding P value was .009; thus, there was a significant relationship between the preoperative MELD/PELD score and the EAA. The correlation coefficients for ALT at POD 1 and EA during the anhepatic phase, at 1 hour after reperfusion, and at POD 1 were 0.64, 0.43, and 0.38, respectively, and the P values for these correlations were .08, .67, and .34. Thus, we observed that ALT and EA generally tended to be somewhat directly correlated, but no significant relationships between these 2 metrics were observed. CONCLUSIONS Endotoxin metabolism reflects the hepatic functional reserve capacity of end-stage liver disease.
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Affiliation(s)
- N Okada
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan.
| | - Y Sanada
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - T Urahashi
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Ihara
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - N Yamada
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - Y Hirata
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - T Katano
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
| | - S Otomo
- Department of Pharmacy, Jichi Medical University Hospital, Tochigi, Japan
| | - K Ushijima
- Department of Clinical Pharmacy, Jichi Medical University, Tochigi, Japan
| | - K Mizuta
- Department of Transplant Surgery, Jichi Medical University, Tochigi, Japan
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Hirata Y, Sanada Y, Urahashi T, Ihara Y, Yamada N, Okada N, Katano T, Otomo S, Ushijima K, Mizuta K. Antibody Drug Treatment for Steroid-Resistant Rejection After Pediatric Living Donor Liver Transplantation: A Single-Center Experience. Transplant Proc 2018; 50:60-65. [PMID: 29407332 DOI: 10.1016/j.transproceed.2017.11.008] [Citation(s) in RCA: 6] [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] [Received: 06/17/2017] [Accepted: 11/13/2017] [Indexed: 01/15/2023]
Abstract
BACKGROUND Antibody drugs have been used to treat steroid-resistant rejection (SRR) after liver transplantation. Although anti-thymocyte globulin has been used for SRR after liver transplantation in place of muromonab-CD3 since 2011 in Japan, the effectiveness of anti-thymocyte globulin after pediatric living-donor liver transplantation (LDLT) has not yet been reported. The aim of this study was to evaluate the effectiveness of antibody drug treatment for SRR after pediatric LDLT in our single center. METHODS Between May 2001 and December 2013, 220 pediatric LDLTs were performed. Initial immunosuppression after LDLT included tacrolimus and methylprednisolone therapy. Acute rejection was diagnosed by use of a liver biopsy and the administration of steroid pulse treatment, and SRR was defined as acute rejection refractory to the steroid pulse treatment. RESULTS Acute rejection and SRR occurred in 74 (33.6%) and 16 patients (7.3%), respectively. The graft survival rates of non-SRR and SRR were 92.4% and 87.5%, respectively (P = .464). The median concentration of alanine aminotransferase before and after the administration of antibody drug was 193.5 mU/mL (range, 8-508) and 78 mU/mL (range, 9-655), respectively (P = .012). The median rejection activity index before and after the administration of antibody drugs was 5 (range, 2-9) and 1 (range, 0-9), respectively (P = .004). After antibody drug treatment, 12 patients had cytomegalovirus infections, 2 patients had Epstein-Barr virus infections, 3 patients had respiratory infections, and 1 patient had encephalitis. The cause of death in 1 patient with SRR was recurrence of infant fulminant hepatic failure. CONCLUSIONS Antibody drug treatment for SRR after pediatric LDLT is safe and effective.
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Affiliation(s)
- Y Hirata
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan.
| | - Y Sanada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan
| | - T Urahashi
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan
| | - Y Ihara
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan
| | - N Yamada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan
| | - N Okada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan
| | - T Katano
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan
| | - S Otomo
- Department of Pharmacy, Jichi Medical University Hospital, Shimotsuke City, Japan
| | - K Ushijima
- Department of Clinical Pharmacology, Jichi Medical University, Shimotsuke City, Japan
| | - K Mizuta
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Japan
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Hirata Y, Sanada Y, Urahashi T, Ihara Y, Yamada N, Okada N, Tashiro M, Katano T, Otomo S, Ushijima K, Mizuta K. Relationship Between Graft Liver Function and the Change of Graft Liver and Spleen Volumes After Technical Variant Liver Transplantation. Transplant Proc 2017; 48:1105-9. [PMID: 27320567 DOI: 10.1016/j.transproceed.2015.12.089] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 12/30/2015] [Indexed: 12/28/2022]
Abstract
BACKGROUND Although there have been a few reports describing the changes of graft liver and spleen volumes after liver transplantation (LT), little is known about the relationship between graft liver function and the changes of these volumes after technical variant liver transplantation (TVLT). We therefore performed a retrospective study to investigate the relationship between graft liver function and these volumes after TVLT. METHODS We retrospectively investigated the cases of 140 TVLT procedures that were performed in our department between July 1987 and October 2012 and in which follow-up was conducted at our department. We calculated the graft liver volume to standard liver volume (GV/SLV) ratio, the spleen volume to standard spleen volume (SV/SSV) ratio, and the spleen volume to graft liver volume (S/L) ratio by CT volumetry. We clarified the relationship between graft liver function (according to the pathological findings) and the graft liver and spleen volumes at 2, 5, and 10 years after TVLT. RESULTS In the normal liver function group, the GV/SLV, SV/SSV, and S/L ratios decreased until 6 months after TVLT and then converged at 10 years after TVLT to 0.95, 1.27, and 0.27, respectively. In the graft liver failure group, the GV/SLV, SV/SSV, and S/L ratios at 10 years after TVLT were 0.67, 5.01, and 1.55, respectively. A significant correlation was observed between the GV/SLV ratio and the presence of mild liver fibrosis at 2 and 5 years after TVLT (P = .03 and P = .04, respectively). CONCLUSIONS Post-transplant CT-volumetry is a noninvasive and effective means of evaluating graft liver status.
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Affiliation(s)
- Y Hirata
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan.
| | - Y Sanada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - T Urahashi
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - Y Ihara
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - N Yamada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - N Okada
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - M Tashiro
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - T Katano
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - S Otomo
- Department of Pharmacy, Jichi Medical University Hospital, Shimotsuke City, Tochigi, Japan
| | - K Ushijima
- Department of Clinical Pharmacology, Jichi Medical University, Shimotsuke City, Tochigi, Japan
| | - K Mizuta
- Department of Transplant Surgery, Jichi Medical University, Shimotsuke City, Tochigi, Japan
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Kodama N, Iwao T, Katano T, Ohta K, Yuasa H, Matsunaga T. Characteristic Analysis of Intestinal Transport in Enterocyte-Like Cells Differentiated from Human Induced Pluripotent Stem Cells. ACTA ACUST UNITED AC 2016; 44:0. [PMID: 27417181 DOI: 10.1124/dmd.116.069336] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 07/13/2016] [Indexed: 12/25/2022]
Abstract
We previously demonstrated that differentiated enterocytes from human induced pluripotent stem (iPS) cells exhibited drug-metabolizing activities and cytochrome P450 CYP3A4 inducibility. The aim of this study was to apply human iPS cell-derived enterocytes in pharmacokinetic studies by investigating the characteristics of drug transport into enterocyte-like cells. Human iPS cells cultured on feeder cells were differentiated into endodermal cells using activin A. These endodermal-like cells were then differentiated into intestinal stem cells by fibroblast growth factor 2. Finally, epidermal growth factor and small-molecule compounds induced the maturation of the intestinal stem cell-like cells. After differentiation, we performed transepithelial electrical resistance (TEER) measurements, immunofluorescence staining, and transport studies. TEER values increased in a time-dependent manner and reached approximately 100 Ω × cm(2) Efflux transport of Hoechst 33342, a substrate of breast cancer resistance protein (BCRP), was observed and inhibited by the BCRP inhibitor Ko143. The uptake of peptide transporter 1 substrate glycylsarcosine was also confirmed and suppressed when the temperature was lowered to 4°C. Using immunofluorescence staining, villin and Na(+)-K(+) ATPase were expressed. These results suggest that human iPS cell-derived enterocytes had loose tight junctions, polarity, as well as uptake and efflux transport functions. In addition, the rank order of apparent membrane permeability coefficient (Papp) values of these test compounds across the enterocyte-like cell membrane corresponded to the fraction absorbance (Fa) values. Therefore, differentiated enterocytes from human iPS cells may provide a useful comprehensive evaluation model of drug transport and metabolism in the small intestine.
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Affiliation(s)
- Nao Kodama
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (N.K., T.I., T.M.), Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (T.K., K.O., H.Y.)
| | - Takahiro Iwao
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (N.K., T.I., T.M.), Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (T.K., K.O., H.Y.)
| | - Takahiro Katano
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (N.K., T.I., T.M.), Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (T.K., K.O., H.Y.)
| | - Kinya Ohta
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (N.K., T.I., T.M.), Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (T.K., K.O., H.Y.)
| | - Hiroaki Yuasa
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (N.K., T.I., T.M.), Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (T.K., K.O., H.Y.)
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (N.K., T.I., T.M.), Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan (T.K., K.O., H.Y.)
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Taniguchi H, Katano T, Nishida K, Kinoshita H, Matsuda T, Ito S. Elucidation of the mechanism of suppressed steroidogenesis during androgen deprivation therapy of prostate cancer patients using a mouse model. Andrology 2016; 4:964-71. [PMID: 27230983 DOI: 10.1111/andr.12213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/05/2016] [Accepted: 04/06/2016] [Indexed: 11/30/2022]
Abstract
Androgen deprivation therapy (ADT) is the standard medical approach to the management of prostate cancer. Patients switched from a GnRH antagonist to a GnRH agonist, did not experience a testosterone surge in spite of the occurrence of luteinizing hormone (LH) surge in our protocol of clinical study. To clarify this observation, male mice pre-treated with two different doses of the GnRH antagonist degarelix for 28 days were further administered the GnRH agonist leuprolide or chorionic gonadotropin, and testosterone production of the mice was studied. Serum LH and testosterone levels, the size of Leydig cells, and expression level of steroidogenesis-related genes in the testis were analyzed. Treatment of mice with a high dose of degarelix (0.1 μg/mouse; HDG), but not a low dose (0.05 μg/mouse; LDG), for 28 days reproduced declined steroidogenesis observed in prostate cancer patients during ADT switched from a GnRH antagonist to a GnRH agonist. The size of the Leydig cells in the HDG mice was not significantly different from that in naive mice. Although expression levels of StAR, P450scc, and 17β HSD increased significantly in the LDH testis, those in the HDG testis did not change. Treatment of mice with a high dose of degarelix for 28 days reproduced the decline in steroidogenesis observed in prostate cancer patients during ADT. In this animal model, we demonstrated that initial ADT may inhibit the ability of Leydig cells to produce testosterone by suppressing the expression of genes involved in steroidogenesis, such as StAR, P450scc, and 17βHSD.
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Affiliation(s)
- H Taniguchi
- Department of Medical Chemistry, Kansai Medical University, Hirakata, Osaka, Japan.,Department of Urology and Andrology, Kansai Medical University, Hirakata, Osaka, Japan
| | - T Katano
- Department of Medical Chemistry, Kansai Medical University, Hirakata, Osaka, Japan
| | - K Nishida
- Department of Medical Chemistry, Kansai Medical University, Hirakata, Osaka, Japan
| | - H Kinoshita
- Department of Urology and Andrology, Kansai Medical University, Hirakata, Osaka, Japan
| | - T Matsuda
- Department of Urology and Andrology, Kansai Medical University, Hirakata, Osaka, Japan
| | - S Ito
- Department of Medical Chemistry, Kansai Medical University, Hirakata, Osaka, Japan
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Taniguchi H, Katano T, Nishida K, Yao I, Morimoto Y, Matsuda T, Ito S. Expression of hOvol2 in the XY body of human spermatocytes. Andrologia 2016; 49. [DOI: 10.1111/and.12599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2016] [Indexed: 11/30/2022] Open
Affiliation(s)
- H. Taniguchi
- Department of Medical Chemistry; Kansai Medical University; Hirakata Osaka Japan
- Department of Urology and Andrology; Kansai Medical University; Hirakata Osaka Japan
| | - T. Katano
- Department of Medical Chemistry; Kansai Medical University; Hirakata Osaka Japan
| | - K. Nishida
- Department of Medical Chemistry; Kansai Medical University; Hirakata Osaka Japan
| | - I. Yao
- Medical Photonics Research Center; Hamamatsu University School of Medicine; Hamamatsu Shizuoka Japan
| | | | - T. Matsuda
- Department of Urology and Andrology; Kansai Medical University; Hirakata Osaka Japan
| | - S. Ito
- Department of Medical Chemistry; Kansai Medical University; Hirakata Osaka Japan
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Katano T, Ito Y, Ohta K, Yasujima T, Inoue K, Yuasa H. Competitive Inhibition of AQP7-mediated Glycerol Transport by Glycerol Derivatives. Drug Metab Pharmacokinet 2014; 29:348-51. [DOI: 10.2133/dmpk.dmpk-13-nt-139] [Citation(s) in RCA: 3] [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: 11/30/2022]
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Katano T, Ito Y, Ohta K, Yasujima T, Inoue K, Yuasa H. Functional Characteristics of Aquaporin 7 as a Facilitative Glycerol Carrier. Drug Metab Pharmacokinet 2014; 29:244-8. [DOI: 10.2133/dmpk.dmpk-13-rg-121] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Riztyan, Katano T, Shimogiri T, Kawabe K, Okamoto S. Genetic diversity and population structure of Indonesian native chickens based on single nucleotide polymorphism markers. Poult Sci 2011; 90:2471-8. [PMID: 22010231 DOI: 10.3382/ps.2011-01450] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Indonesian native chickens are considered an important genetic resource, particularly with respect to their excellent traits for meat and egg production. However, few molecular genetic studies of these native chickens have been conducted. We analyzed the genetic diversity and differentiation of 4 populations of Indonesian native chickens: Black Kedu (BK), Kedu (KD), Kampung (LOC), and Arab (AR). Blood samples from 188 individuals were collected in central and western Java. Genomic DNA was genotyped using 98 autosomal SNP markers, of which 87 were found to be polymorphic. The proportion of polymorphic loci and the average heterozygosity of each population were in the range of 0.765 to 0.878 and 0.224 to 0.263, respectively. The 4 populations of Indonesian chickens appeared to be derived from 3 genetic populations (K = 3): maximum likelihood clustering showed that the BK variety and AR breed were each assigned to a distinct cluster, whereas the LOC ecotype and KD variety were admixed populations with similar proportions of membership. Principal components analysis revealed that eigenvector 1 separated BK and AR from the other 2 populations. Neighbor-joining trees constructed from pairwise distance matrix (F(ST)) estimates, for individuals and between populations, corroborated that the LOC ecotype and KD variety were related closely, whereas the BK variety and AR breed diverged at greater distances. These results also confirmed the usefulness of SNP markers for the study of genetic diversity.
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Affiliation(s)
- Riztyan
- United Graduate School of Agriculture, Kagoshima University, Kagoshima, Japan.
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Ishii M, Ohta K, Katano T, Urano K, Watanabe J, Miyamoto A, Inoue K, Yuasa H. Dual functional characteristic of human aquaporin 10 for solute transport. Cell Physiol Biochem 2011; 27:749-56. [PMID: 21691092 DOI: 10.1159/000330083] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2011] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Although aquaglyceroporins have been generally believed to operate in a channel mode, which is of nonsaturable nature, for glycerol as well as for water, we recently found that human aquaporin 9 (hAQP9) operates in a carrier-mediated mode, which is of saturable nature, for glycerol. Based on the finding, we assumed that such a characteristic might be shared by the other aquaglyceroporins and examined the functional characteristics of hAQP10, which is an intestine-specific aquaglyceroporin. METHODS Transport assays were conducted using Xenopus laevis oocytes expressing hAQP10 derived from the microinjected cRNA. RESULTS The transport of glycerol by hAQP10 was found to be highly saturable with a Michaelis constant of 10.4 μM and specifically inhibited by several glycerol analogs such as monoacetin. Furthermore, when glycerol was preloaded in hAQP10-expressing oocytes, its efflux was trans-stimulated by extracellular glycerol. These results indicate the involvement of a carrier-mediated mechanism in glycerol transport by hAQP10. Interestingly, a channel mechanism was also found to be involved in part in hAQP10-mediated glycerol transport. CONCLUSION The present study unveiled the uniquely dual functional characteristic of hAQP10 as a carrier/channel for solute transport, providing a novel insight into its operation mechanism, which would help further elucidate its physiological role.
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Affiliation(s)
- Megumi Ishii
- Department of Biopharmaceutics, Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku, Nagoya 467-8603, Japan
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Chizaki R, Yao I, Katano T, Matsuda T, Ito S. Restricted Expression of Ovol2/MOVO in XY Body of Mouse Spermatocytes at the Pachytene Stage. ACTA ACUST UNITED AC 2011; 33:277-86. [DOI: 10.2164/jandrol.110.012294] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Jung S, Kim BH, Katano T, Kong DS, Han MS. Pseudomonas fluorescensHYK0210-SK09 offers species-specific biological control of winter algal blooms caused by freshwater diatomStephanodiscus hantzschii. J Appl Microbiol 2008; 105:186-95. [DOI: 10.1111/j.1365-2672.2008.03733.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Takagi K, Okuda-Ashitaka E, Mabuchi T, Katano T, Ohnishi T, Matsumura S, Ohnaka M, Kaneko S, Abe T, Hirata T, Fujiwara S, Minami T, Ito S. Involvement of stem cell factor and its receptor tyrosine kinase c-kit in pain regulation. Neuroscience 2008; 153:1278-88. [PMID: 18423881 DOI: 10.1016/j.neuroscience.2008.02.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2007] [Revised: 02/21/2008] [Accepted: 02/29/2008] [Indexed: 12/11/2022]
Abstract
The c-kit receptor tyrosine kinase is expressed in a subpopulation of small- and medium-sized neurons of the dorsal root ganglia (DRG) and in the superficial layer of the spinal cord. Stem cell factor (SCF), a ligand of the c-kit receptor, induces neurite outgrowth from DRG and supports the survival of c-kit-expressing neurons. To clarify the possible function of the SCF/c-kit receptor system in the adult animal, we investigated the expression of c-kit receptor in the spinal cord and DRG in relation to pain by using H2C7, a newly developed anti-c-kit monoclonal antibody. S.c. and intrathecal injection of SCF markedly reduced the paw withdrawal threshold to mechanical stimuli and intrathecal SCF at 10 pg maximally induced mechanical allodynia in conscious mice. Intrathecal SCF also reduced the paw withdrawal latency to heat stimuli significantly but transiently. The c-kit receptor was co-expressed in 58.4% of calcitonin gene-related peptide (CGRP) -positive, but only 5.1% of isolectin B4-positive, DRG neurons. In the spinal cord, the c-kit receptor was detected in the superficial layer of the dorsal horn and co-localized there with CGRP in central terminals of DRG neurons. Selective elimination of unmyelinated C-fibers by neonatal capsaicin treatment resulted in marked reduction of the c-kit receptor and CGRP expression in the superficial layer of the spinal cord. Cell-size profiles showed that c-kit receptor expression was significantly up-regulated and down-regulated in medium-sized DRG neurons after neonatal capsaicin treatment and nerve injury, respectively. These results suggest that the c-kit receptor is mainly expressed in peptidergic small-sized DRG neurons and may be involved in pain regulation both peripherally and centrally.
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Affiliation(s)
- K Takagi
- Department of Medical Chemistry, Kansai Medical University, 10-15 Fumizono, Moriguchi, Japan
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16
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Ohgusu Y, Ohta KY, Ishii M, Katano T, Urano K, Watanabe J, Inoue K, Yuasa H. Functional Characterization of Human Aquaporin 9 as a Facilitative Glycerol Carrier. Drug Metab Pharmacokinet 2008; 23:279-84. [DOI: 10.2133/dmpk.23.279] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Tatsumi S, Mabuchi T, Katano T, Matsumura S, Abe T, Hidaka H, Suzuki M, Sasaki Y, Minami T, Ito S. Involvement of Rho-kinase in inflammatory and neuropathic pain through phosphorylation of myristoylated alanine-rich C-kinase substrate (MARCKS). Neuroscience 2005; 131:491-8. [PMID: 15708490 DOI: 10.1016/j.neuroscience.2004.10.022] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2004] [Indexed: 11/18/2022]
Abstract
Myristoylated alanine-rich C-kinase substrate (MARCKS) is a major in vivo substrate for protein kinase C in the brain and has been implicated in cellular processes associated with cytoskeletal restructuring such as synaptic trafficking and neurotransmitter release. A phosphorylation-site specific antibody against Ser159-phospho-MARCKS (pS159-Mar-Ab) revealed that MARCKS is phosphorylated at Ser159 by Rho-kinase and that its phosphorylation is inhibited by the Rho-kinase specific inhibitor H-1152. Since the function of MARCKS is regulated by phosphorylation at multiple sites, here we examined the involvement of Rho-kinase in relation to phosphorylation of MARCKS at Ser159 in inflammatory and neuropathic pain by H-1152. When intrathecally administered 10 min before s.c. injection of formalin, H-1152 at 10 and 100 ng attenuated the second-phase, but not the first-phase, pain-like behaviors in the formalin test. Neuropathic pain induced by selective L5 spinal nerve transection was also relieved by intrathecal injection of H-1152. Nitric oxide synthase activity visualized by NADPH diaphorase histochemistry increased in the superficial layer of the spinal cord 30 min after formalin injection and 7 days after nerve transection, which were blocked by H-1152. Phosphorylation of MARCKS at Ser159 was detected in the spinal cord by pS159-Mar-Ab and the level of phosphorylation increased in the superficial layer after nerve transection. In contrast, immunoreactivities of neuronal nitric oxide synthase and MARCKS did not change significantly in the spinal cord before and after nerve transection. Taken together, the present study demonstrates that Rho-kinase is involved in inflammatory pain and the maintenance of neuropathic pain through phosphorylation of MARCKS at Ser159.
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Affiliation(s)
- S Tatsumi
- Department of Anesthesiology, Osaka Medical College, Takatsuki 569-8686, Japan
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18
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Ikeda T, Sato K, Katano T, Hayashi Y. Improved visual acuity following pars plana vitrectomy for diabetic cystoid macular edema and detached posterior hyaloid. Retina 2000; 20:220-2. [PMID: 10783963 DOI: 10.1097/00006982-200002000-00023] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- T Ikeda
- Department of Ophthalmology, Osaka City General Hospital, Japan.
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19
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Ikeda T, Sato K, Katano T, Hayashi Y. Attached posterior hyaloid membrane and the pathogenesis of honeycombed cystoid macular edema in patients with diabetes. Am J Ophthalmol 1999; 127:478-9. [PMID: 10218713 DOI: 10.1016/s0002-9394(98)00382-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE To investigate the pathogenesis of honeycombed cystoid macular edema in patients with diabetes. METHODS The relationship between the posterior hyaloid membrane and honeycombed cystoid macular edema was examined in 24 eyes of 20 patients with diabetes who underwent vitrectomy for cystoid macular edema. RESULTS In 19 eyes of 15 patients with diabetes, the posterior hyaloid membrane was attached to the macula, and in five eyes of five patients, the posterior hyaloid membrane was separated from the macula. In 14 (74%) of the 19 eyes with an attached posterior hyaloid membrane, honeycombed cystoid macular edema was detected. Conversely, honeycombed cystoid edema was not detected in any of the five eyes with posterior hyaloid detachment (P = .0059). CONCLUSIONS These observations demonstrate a strong correlation between an attached posterior hyaloid membrane and the presence of honeycombed cystoid macular edema. We suggest that retinal traction by the posterior hyaloid membrane is involved in the pathogenesis of honeycombed cystoid changes in diabetic patients.
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Affiliation(s)
- T Ikeda
- Department of Ophthalmology, Osaka City General Hospital, Osaka, Japan.
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20
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Ikeda T, Sato K, Katano T, Hayashi Y. Surgically induced detachment of the anterior hyaloid membrane from the posterior lens capsule. Arch Ophthalmol 1999; 117:408-9. [PMID: 10088827 DOI: 10.1001/archopht.117.3.408] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Vitreous hemorrhage adhering to the posterior lens capsule prevents adequate visualization of the vitreous cavity and fundus during vitreous surgery and during the dissection of fibrovascular membranes. This type of hemorrhage is difficult to remove by aspiration or resection using a vitreous cutter. We have developed a new technique designed to detach surgically the anterior vitreous for the removal of hemorrhage in patients with proliferative diabetic retinopathy. In this hydrodissection technique, the anterior vitreous is detached from the posterior lens capsule by a forced injection of infusion fluid into the anterior chamber. This technique separates the vitreous hemorrhage adhering to the posterior lens capsule and allows its removal.
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Affiliation(s)
- T Ikeda
- Department of Ophthalmology, Osaka City General Hospital, Osaka, Japan.
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21
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Abstract
AIM To report the success of vitrectomy in eliminating cystoid macular oedema and improving vision in three eyes of two patients with diabetic cystoid macular oedema. In all of the eyes there was no ophthalmoscopic evidence of traction from a posterior hyaloid membrane or from proliferative tissue. METHODS Pars plana vitrectomy was performed on three eyes of two patients with diabetic cystoid macular oedema who did not show traction upon examination with a slit lamp biomicroscope and a scanning laser ophthalmoscope. RESULTS Cystoid changes disappeared 1, 3, and 5 days, postoperatively, and diffuse macular oedema resolved within 2 weeks. The visual acuity was improved and maintained. CONCLUSION Vitrectomy can be effective in some patients with diabetic cystoid macular oedema even in patients who lack evidence of traction by ophthalmoscopy.
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Affiliation(s)
- T Ikeda
- Department of Ophthalmology, Osaka City General Hospital, Japan
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22
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Shimizu J, Tazawa T, Park-Matsumoto YC, Katano T, Akiba Y, Kuroiwa T. [Meningioma associated with acute subdural hematoma: a case report]. No Shinkei Geka 1998; 26:743-7. [PMID: 9744005] [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: 02/08/2023]
Abstract
We present a case of meningioma associated with acute subdural hematoma. This 67-year-old male had a sudden onset of severe headache when he was on the train. He had a CT scan which revealed an acute subdural hematoma at the left parietal convex. Cerebral angiography disclosed a small focus (3 x 4 cm) of vascular stain under the left parietal bone supplied by the left middle meningeal artery. He was diagnosed as having a meningioma with surrounding acute subdural hematoma. The removal of this tumor was carried out without delay. It was fragile and the bleeding point was not detected. Pathological diagnosis was meningothelial meningioma. The literature showed meningioma associated with acute subdural hematoma is rare, but when it is discovered incidentally, surgical resection might be indicated.
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Affiliation(s)
- J Shimizu
- Division of Neurosurgery, Akiba Memorial Hospital, Saitama, Japan
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23
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Abstract
PURPOSE To report a noninvasive method for evaluating eyes with cystoid macular edema. METHODS We obtained infrared images of cystoid macular edema in eight eyes of eight patients using a scanning laser ophthalmoscope with the dark-field mode of a 780-nm diode laser. Differences between infrared images and fluorescein angiograms in the imaging of cystoid changes were examined. RESULTS With the scanning laser ophthalmoscope, we observed cystoid macular changes as images that resembled three-dimensional pictures in the dark-field mode with infrared light. Cystoid changes observed by this method generally agreed with changes observed by fluorescein angiography. CONCLUSIONS Scanning laser ophthalmoscopy with infrared light in a dark-field mode is noninvasive, and the results in eyes with cystoid macular edema generally agreed with results obtained by fluorescein angiography. This method is useful for examining eyes with cystoid macular edema.
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Affiliation(s)
- T Ikeda
- Department of Ophthalmology, Osaka City General Hospital, Osaka, Japan.
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24
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Hayashi K, Kurushima H, Kuga Y, Shingu T, Tanaka K, Yasunobu Y, Nomura K, Ohtani H, Hiraga T, Toyota Y, Katano T, Sakai-Ohta K, Kajiyama G. Comparison of the effect of bezafibrate on improvement of atherogenic lipoproteins in Japanese familial combined hyperlipidemic patients with or without impaired glucose tolerance. Cardiovasc Drugs Ther 1998; 12:3-12. [PMID: 9607127 DOI: 10.1023/a:1007781310827] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The effect of bezafibrate on plasma lipoproteins was investigated in Japanese familial combined hyperlipidemic patients with or without an impaired glucose tolerance accompanied by a low-density lipoprotein subclass, with the major gradient gel peak at a particle diameter of less than 25.5 nm. Bezafibrate treatment at a dose of 400 mg/d for 12 weeks produced an antiatherogenic effect on lipoprotein profiles, as reflected by a decrease in plasma triglyceride levels, an increase in plasma high-density lipoprotein-cholesterol levels, induction of the large-size subclass of low-density lipoprotein, and disappearance of intermediate-density lipoproteins. The plasma total and low-density lipoprotein-cholesterol-lowering effect of bezafibrate was significant in patients without impaired glucose tolerance but was not significant in patients with impaired glucose tolerance. Bezafibrate increased lipoprotein lipase activity and decreased the activity of cholesteryl ester transfer protein, both in patients with or without impaired glucose tolerance. There was no difference in the distribution of signal peptide insertion/deletion or Xbal polymorphisms of the apolipoprotein B gene in patients with or without impaired glucose tolerance. Mechanisms other than lipoprotein lipase, cholesteryl ester transfer protein activities, and an apolipoprotein B gene polymorphism may be responsible for the resistance to lowering of plasma total and low-density lipoprotein cholesterol levels with bezafibrate treatment in familial combined hyperlipidemic patients with impaired glucose tolerance.
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Affiliation(s)
- K Hayashi
- First Department of Internal Medicine, Hiroshima University School of Medicine, Japan
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25
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Hayashi K, Kuga Y, Shingu T, Tanaka K, Yasunobu Y, Nomura K, Ohtani H, Toyota Y, Katano T, Sakai K, Kajiyama G. 2.P.39 Effect of bezafibrate on atherogenic lipoproteins in Japanese familial combined hyperlipidemic patients with or without impaired glucose tolerance. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)88676-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Tanaka K, Hayashi K, Kuga Y, Yasunobu Y, Nomura K, Toyota Y, Katano T, Sakai K, Shingu T, Kajiyama G. 3.P.329 Probucol inhibits neointimal formation of balloon injured artery in rabbit and growth factor induced proliferation of vascular smooth muscle cells. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)89407-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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27
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Kuga Y, Hayashi K, Shingu T, Tanaka K, Yasunobu Y, Nomura K, Toyota Y, Katano T, Ohta K, Kajiyama G. 3.P.322 Sarpogrelate hydrochloride prevents neointima formation of balloon injured carotid artery in rabbit. Atherosclerosis 1997. [DOI: 10.1016/s0021-9150(97)89396-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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28
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Dote K, Ninomiya M, Nomura K, Nakano Y, Nakanishi S, Sasaki S, Katano T, Kuwashima R, Mitsuda H, Okuhara T. [Clinical characteristics of pulmonary embolism without definitive predisposing factors]. J Cardiol 1996; 28:329-36. [PMID: 8986856] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Patients with pulmonary embolism may have no definitive predisposing factors for thrombi. The clinical entity of chronic pulmonary embolism is also uncertain. This study clarified the clinical characteristics of pulmonary embolism without definitive predisposing factors. During the last 10 years, 36 consecutive patients were diagnosed as having pulmonary embolism (mean age 61 years, female 75%). Twenty-four patients (67%) had definitive predisposing factors ("definitive" group). Patients without definitive predisposing factors had the following characteristics. The onset of symptoms was out-hospital and insidious. The main symptom was exertional dyspnea without acute episode compatible with an embolism. In four patients (33%) there was a delay of over 2 years form the onset of symptoms to the diagnosis. Three patients had been treated for depression. Thrombolytic therapy caused an inadequate fall in mean pulmonary artery pressure from 41 +/- 11 to 24 +/- 8 mmHg and in three patients it remained over 30 mmHg. Deep vein thrombosis were found in four of nine patients in whom venography were performed 10 days after thrombolytic therapy, but only one patient showed thrombus in the "definitive" group. During the convalescent stage, all patients were treated with prophylactic warfarin. Home oxygen therapy was indicated in three patients and an inferior vena caval filter was implanted in two patients. One third of patients with pulmonary embolism in our institute had no definitive predisposing factors. In these patients, even with thrombolytic therapy, recovery of pulmonary hypertension was often insufficient and deep vein thrombosis persisted. Clinicians should be aware of this disease to avoid undue delay in its diagnosis.
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Affiliation(s)
- K Dote
- Department of Internal Medicine, Hiroshima City Asa Hospital
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29
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Okada K, Katano T, Kamogashira T, Zahn RJ, Morimito Y, Kagami S, Yasutomo K, Kuhara T, Kuroda Y. Streptokinase gene variable region classification in streptococci: lack of correlation with post-streptococcal glomerulonephritis. Clin Nephrol 1995; 44:8-13. [PMID: 7554538] [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: 01/25/2023] Open
Abstract
To investigate a possible causal role of streptokinase (SKase) in acute post-streptococcal glomerulonephritis (APSGN), the major variable region of SKase genes of Streptococcus pyogenes strains isolated from patients with and without APSGN were analyzed using the polymerase chain reaction, restriction enzyme analysis and the direct sequencing of SKase genes. In the APSGN-associated strains, six of nine revealed mutant classes corresponding to the nephritogenic classes I and II proposed by Johnston et al. [1992], the remaining three belonged to non-nephritogenic classes. In twenty strains not associated with APSGN, seventeen belonged to classes I and II, while three were from other classes. The major variable region of the SKase gene shows no apparent relation with induction of APSGN in humans, suggesting that unique classes of streptococcal SKase do not play a role in the pathogenesis of APSGN.
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Affiliation(s)
- K Okada
- Department of Pediatrics, School of Medicine, University of Tokushima, Japan
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30
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Harada Y, Katano T, Nakamura Y, Adachi Y. [A case of chronic neutrophilic leukemia associated with polycythemia vera]. Rinsho Ketsueki 1993; 34:738-42. [PMID: 8366577] [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: 01/30/2023]
Abstract
A 74-year-old male patient was seen on December 15, 1980 because of right shoulder pain and leukocytosis. The spleen and the liver were enlarged, and palpable, 3 and 4 fingerbreadths below the costal margin respectively. The red blood cell count (RBC) was 899 x 10(4)/microliters, hemoglobin (Hb) 20.6 g/dl, reticlocyte (Ret) 7/1000, platelets (Plt) 34.2 x 10(4)/microliters, the white blood cell count (WBC) 26,800/microliters with 86% neutrophils. A bone marrow aspiration showed the nucleated cell count (NCC) to be 16.5 x 10(4)/microliters, and the myeloid/erythroid ratio (M/E) 2.0. The patient was treated with venesection and later with carboquone. Since September 1990 he has not been treated with any agents because of erythrocytopenia. In July 25, 1991, the spleen was enlarged, and palpated 8 fingerbreadths below the costal margin. The RBC was 456 x 10(4)/microliters, Hb 12.5 g/dl, Ret 9/1000, Plt24.2 x 10(4)/microliters, the WBC41,500/microliters with 90% neutrophils. Bone marrow aspiration showed the NCC to be 16.5 x 10(4)/microliters, M/E14.3, with no atypical cells. Chromosome studies of marrow cells revealed no Ph1 chromosome. Many hematologic malignancies have been occasionally associated with polycythemia vera (PV), but chronic neutrophilic leukemia associated with PV is a very rare condition.
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Affiliation(s)
- Y Harada
- Department of Internal Medicine, Tokyo Metropolitan Toshima General Hospital
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31
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Oka T, Aoyama Y, Natori Y, Katano T, Endo Y. An efficient expression system for a variant form of the cytotoxic protein alpha-sarcin in Escherichia coli. Biochim Biophys Acta 1992; 1130:182-8. [PMID: 1562594 DOI: 10.1016/0167-4781(92)90526-6] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
An efficient Escherichia coli system for the production of a variant form of the cytotoxic protein alpha-sarcin (delta Ala 1) has been constructed. cDNA encoded alpha-sarcin lacking N-terminal alanine was ligated with the bla signal peptide sequence (the signal sequence of E. coli beta-lactamase localizes the protein in the periplasm) and was inserted into an inducible bacterial expression vector pKTN2-2. When the plasmid introduced into E. coli was expressed in the presence of IPTG, the recombinant product accumulated in the periplasmic space. The product was purified by Affi-Gel Blue followed by Bio-Rex 70 column chromatography. Recombinant alpha-sarcin (delta Ala 1) displayed the properties similar to those of authentic alpha-sarcin isolated from Aspergillus giganteus with respect to its molecular mass and enzymatic activity in ribosomal inactivation. The amount of alpha-sarcin variant produced in the system was estimated to be 1.2 mg/l of culture.
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Affiliation(s)
- T Oka
- Department of Nutritional Chemistry, School of Medicine, University of Tokushima, Japan
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32
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Kubota T, Katano T, Yoshizawa M, Ohtake K, Onodera F. Measurement of respiratory work in a breath by breath analysis using new bedside respiratory monitoring system. Can J Anaesth 1990; 37:S109. [PMID: 2361248] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Affiliation(s)
- T Kubota
- Department of ICU.CCU, Jichi Medical School, Tochigi, Japan
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33
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Abstract
New hybrid powders have been produced by the dry processing of six drugs (oxyphenbutazone, prednisolone, theophylline, indomethacin, phenacetin and aspirin), with potato starch used as a core material, by means of an electric mortar and a powder surface reforming system designed to produce hybrid powders. The hybrid powders obtained immediately after production differed in their structure from interactive mixtures. With the hybrid powders the drug was spread on the surface of the core particle by friction and collision that occurred in the dry process, but with interactive mixtures the drug simply adhered as intact particles to the surface of diluent particles. Scanning electron microscopy and powder X-ray diffractometry indicated that the mechanochemical phenomenon was essential for the production of the hybrid powders. With time, a shape change in the adhering drug was observed as a relaxation process took place, with recrystallization resulting from the release of accumulated energy. The change with time might depend upon the method of producing powders and the physical properties of the drug used, e.g. the smooth layer of indomethacin produced by the powder surface reforming system reverted to fine particles tightly adhering to the starch surface, though no change was observed with prednisolone.
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Affiliation(s)
- T Ishizaka
- Faculty of Pharmaceutical Sciences, Science University of Tokyo, Japan
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34
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Katano T, Imai K, Sugihara S, Yokohata M, Toyama Y. [Mentality and health of the aged population in sparsely populated mountainous areas. A medico-social study at three communities at Totsukawa Mura, Yoshino-Gun, Nara Prefecture. 2]. Kango Tenbo 1986; 11:551-6. [PMID: 3637498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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35
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Katano T. [A method of activation of human relations in hospitals; T group]. Kango Tenbo 1983; 8:311-315. [PMID: 6552350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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36
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Katano T. [The "dying process" of the aged]. Kango Gijutsu 1982; 28:165-72. [PMID: 6916015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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37
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38
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Katano T. [Hospitalization and visiting by friends and relatives: continuation and disruption of the outside world]. Kango Gijutsu 1978; 24:150-7. [PMID: 248478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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39
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40
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Katano T. [Ophthalmological study of cases with whiplash injury]. Nihon Ganka Kiyo 1970; 21:525-8. [PMID: 5465891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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41
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Mizukawa T, Katano T. [Disturbances of accommodation and convergence]. Saishin Igaku 1970; 25:692-8. [PMID: 5429570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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42
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Manabe R, Katano T. [Studies on keratoplasty with endothelium-damaged grafts in rabbits]. Nippon Ganka Gakkai Zasshi 1967; 71:1186-8. [PMID: 4867284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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43
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Katano T. [Influence of temperature on swelling pressure of the bovine corneal stroma]. Nihon Ganka Kiyo 1966; 17:999-1010. [PMID: 6009551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Katano T, Manabe R. [Influences of temperature on swelling pressure of the corneal stroma]. Nippon Ganka Gakkai Zasshi 1965; 69:784-8, discussion 788. [PMID: 5006718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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