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Nishimura F, Kim Y, Bando T, Fujise Y, Nakamura G, Murase H, Kato H. Morphological differences in skulls and feeding apparatuses between Antarctic (Balaenoptera bonaerensis) and common (Balaenoptera acutorostrata) minke whales, and the implication for their feeding ecology. CAN J ZOOL 2021. [DOI: 10.1139/cjz-2020-0237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The differences in rorqual feeding ecology have been linked to the presence of different morphological markers. The Antarctic minke whale (Balaenoptera bonaerensis Burmeister, 1867) and the common minke whale (Balaenoptera acutorostrata Lacépède, 1804) are closely related species, but their morphological differences have not been fully investigated. In this study, we compared 21 skull and 11 feeding apparatus (baleen and mouth-related parts) measurement points between these two species using hundreds of individuals covering a wide range of body lengths in both sexes. Their engulfment capacities were estimated using these measurements. Our results show that Antarctic minke whales have (i) proportionally larger skulls to the body length, (ii) more dorsoventrally and laterally curved rostra, (iii) proportionally larger feeding apparatuses to the condylobasal length, and (iv) significantly larger engulfment capacity than common minke whales. These differences could indicate that Antarctic minke whales have developed a feeding strategy suitable for feeding on krill, which forms large schools. In contrast, common minke whales have adapted to prey on small pelagic fishes that are agile and form small schools.
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Affiliation(s)
- F. Nishimura
- Laboratory of Cetacean Biology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - Y. Kim
- Laboratory of Cetacean Biology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - T. Bando
- Institute of Cetacean Research, Toyomi Shinko Building 5F, 4-5 Toyomi-cho, Chuo-ku, Tokyo 104-0055, Japan
| | - Y. Fujise
- Institute of Cetacean Research, Toyomi Shinko Building 5F, 4-5 Toyomi-cho, Chuo-ku, Tokyo 104-0055, Japan
| | - G. Nakamura
- Laboratory of Cetacean Biology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - H. Murase
- Laboratory of Cetacean Biology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
| | - H. Kato
- Laboratory of Cetacean Biology, Tokyo University of Marine Science and Technology, 4-5-7 Konan, Minato-ku, Tokyo 108-8477, Japan
- Institute of Cetacean Research, Toyomi Shinko Building 5F, 4-5 Toyomi-cho, Chuo-ku, Tokyo 104-0055, Japan
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Fujise Y, Kubota M, Suzuki M, Tamano H, Takeda A. Blockade of intracellular Zn 2+ signaling in the basolateral amygdala affects object recognition memory via attenuation of dentate gyrus LTP. Neurochem Int 2017; 108:1-6. [DOI: 10.1016/j.neuint.2017.01.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 01/18/2017] [Accepted: 01/24/2017] [Indexed: 12/01/2022]
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Onoyama T, Koda M, Fujise Y, Takata T, Kawata S, Okamoto T, Miyoshi K, Matono T, Sugihara T, Matsumoto K, Kawaguchi K, Harada K, Yashima K, Isomoto H. Utility of virtual touch quantification in the diagnosis of pancreatic ductal adenocarcinoma. Clin Imaging 2016; 42:64-67. [PMID: 27886609 DOI: 10.1016/j.clinimag.2016.11.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 10/28/2016] [Accepted: 11/16/2016] [Indexed: 12/21/2022]
Abstract
This study aimed to compare the tissue stiffness of pancreatic ductal adenocarcinoma (PDAC) with that of pancreatic parenchyma using virtual touch quantification (VTQ). SWV was measured in 34 PDAC lesions and in pancreatic parenchyma of both controls and patients. SWVs in PDAC lesions were significantly higher than in pancreatic parenchyma in both healthy controls and in patients with PDAC. The area under the ROC for diagnosis of PDAC was 0.94 for pancreatic parenchyma in healthy controls, and 0.85 for pancreatic parenchyma in patients with PDAC. VTQ can provide a useful and additional information for diagnosis of PDAC.
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Affiliation(s)
- Takumi Onoyama
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Masahiko Koda
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan.
| | - Yuki Fujise
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Tomoaki Takata
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Soichiro Kawata
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Toshiaki Okamoto
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kennichi Miyoshi
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Tomomitsu Matono
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Takaaki Sugihara
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kazuya Matsumoto
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Koichiro Kawaguchi
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kenichi Harada
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Kazuo Yashima
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
| | - Hajime Isomoto
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago 683-8504, Japan
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Takata T, Koda M, Sugihara T, Sugihara S, Okamoto T, Miyoshi K, Hodotsuka M, Fujise Y, Matono T, Okano J, Hosho K, Iyama T, Fukui T, Fukuda S, Munemura C, Isomoto H. Left Renal Cortical Thickness Measured by Ultrasound Can Predict Early Progression of Chronic Kidney Disease. Nephron Clin Pract 2015; 132:25-32. [PMID: 26581096 DOI: 10.1159/000441957] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2015] [Accepted: 10/24/2015] [Indexed: 11/19/2022] Open
Abstract
AIMS The kidney becomes atrophic in advanced chronic kidney disease, and renal size and parenchymal volume correlate with renal function. However, alterations in renal parenchymal volume have not been adequately studied in terms of the renal cortex and medulla. We investigated the relationship between the changes in the renal cortex and medulla and renal function. METHODS Renal ultrasound (US) parameters including renal length, parenchymal thickness, cortical thickness and medullary thickness were assessed in 176 subjects, who were categorized into 4 groups based on the estimated glomerular filtration rate (ml/min/1.73 m2): group 1, ≥ 90; group 2, ≥ 60 but < 90; group 3, ≥ 30 but < 60; and group 4, < 30. Renal US parameters in both kidneys were compared among the 4 groups. RESULTS We found stepwise associations in renal length, cortical thickness and parenchymal thickness with decreased renal function. Medullary thickness showed no changes among groups 1-3. Multiple linear regression analysis including sex, age and renal US parameters showed that only renal length was an independent predictor of renal function. When analyzed in groups 1-3, cortical thickness was the strongest associated parameter. Lower cortical left/right ratio (left cortical thickness/right cortical thickness) showed a stepwise association with a decrease in renal function. CONCLUSION Renal length and cortical thickness measured by US were correlated with renal function. In particular, left cortical thickness could help to detect early changes in renal function.
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Affiliation(s)
- Tomoaki Takata
- Division of Medicine and Clinical Science, Tottori University Faculty of Medicine, Tottori, Japan
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Suzuki M, Fujise Y, Tsuchiya Y, Tamano H, Takeda A. Excess influx of Zn(2+) into dentate granule cells affects object recognition memory via attenuated LTP. Neurochem Int 2015; 87:60-5. [PMID: 26044210 DOI: 10.1016/j.neuint.2015.05.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [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: 03/05/2015] [Revised: 04/21/2015] [Accepted: 05/26/2015] [Indexed: 10/23/2022]
Abstract
The influx of extracellular Zn(2+) into dentate granule cells is nonessential for dentate gyrus long-term potentiation (LTP) and the physiological significance of extracellular Zn(2+) dynamics is unknown in the dentate gyrus. Excess increase in extracellular Zn(2+) in the hippocampal CA1, which is induced with excitation of zincergic neurons, induces memory deficit via excess influx of Zn(2+) into CA1 pyramidal cells. In the present study, it was examined whether extracellular Zn(2+) induces object recognition memory deficit via excess influx of Zn(2+) into dentate granule cells. KCl (100 mM, 2 µl) was locally injected into the dentate gyrus. The increase in intracellular Zn(2+) in dentate granule cells induced with high K(+) was blocked by co-injection of CaEDTA and CNQX, an extracellular Zn(2+) chelator and an AMPA receptor antagonist, respectively, suggesting that high K(+) increases the influx of Zn(2+) into dentate granule cells via AMPA receptor activation. Dentate gyrus LTP induction was attenuated 1 h after KCl injection into the dentate gyrus and also attenuated when KCl was injected 5 min after the induction. Memory deficit was induced when training of object recognition test was performed 1 h after KCl injection into the dentate gyrus and also induced when KCl was injected 5 min after the training. High K(+)-induced impairments of LTP and memory were rescued by co-injection of CaEDTA. These results indicate that excess influx of Zn(2+) into dentate granule cells via AMPA receptor activation affects object recognition memory via attenuated LTP induction. Even in the dentate gyrus where is scarcely innervated by zincergic neurons, it is likely that extracellular Zn(2+) homeostasis is strictly regulated for cognition.
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Affiliation(s)
- Miki Suzuki
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuki Fujise
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuka Tsuchiya
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Haruna Tamano
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Atsushi Takeda
- Department of Neurophysiology, School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan.
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Oyama K, Koda M, Sugihara T, Kishina M, Miyoshi K, Okamoto T, Hodotsuka M, Fujise Y, Matono T, Tokunaga S, Okamoto K, Hosho K, Okano J, Murawaki Y. Rapid and early α-fetoprotein and des-γ-carboxy prothrombin responses to initial arterial infusion chemotherapy predict treatment outcomes of advanced hepatocellular carcinoma. Mol Clin Oncol 2015; 3:655-662. [PMID: 26137283 DOI: 10.3892/mco.2015.523] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 12/08/2014] [Accepted: 02/26/2015] [Indexed: 02/07/2023] Open
Abstract
The aim of the present study was to predict the effects of transarterial infusion (TAI) chemotherapy based on early changes in α-fetoprotein (AFP) and des-γ-carboxy prothrombin (DCP) in patients with advanced hepatocellular carcinoma (HCC). Seventy-four patients who underwent TAI with cisplatin, 5-fluorouracil, mitomycin C and epirubicin for advanced HCC were enrolled. Antitumor responses were evaluated 6 months after TAI. Rapid and early responses were defined as the ratio of AFP or DCP after 1 week and 1 month compared to baseline. A total of 5, 10, 17 and 42 patients had complete response (CR), partial response (PR), stable disease (SD) or progressive disease (PD), respectively. Early AFP response was significantly lower in the CR+PR compared to the SD+PD groups (P<0.01). The early DCP response was significantly lower in the CR+PR compared to the SD+PD. The sensitivity and specificity of rapid and early AFP responses in the CR+PR were 0.78 and 0.72, and 0.80 and 0.73, respectively, and those of rapid and early DCP responses were 0.67 and 0.65, and 0.77 and 0.71, respectively. The combination of AFP and DCP responses had higher specificity compared to AFP or DCP alone responses. Patients were divided into responder and non-responder groups to evaluate the prediction of survival outcome. Early responders of AFP, DCP and AFP+DCP, who were divided based on the cut-off values of CR+PR survived significantly longer than the non-responders (P<0.05). In conclusion, rapid or early responses of AFP and/or DCP levels 1 and 4 weeks after TAI chemotherapy helped to predict the treatment effects.
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Affiliation(s)
- Kenji Oyama
- Tottori University Hospital Cancer Center, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Masahiko Koda
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Takaaki Sugihara
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Manabu Kishina
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Kenichi Miyoshi
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Toshiaki Okamoto
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Masanori Hodotsuka
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Yuki Fujise
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Tomomitsu Matono
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Shiho Tokunaga
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Kinya Okamoto
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Keiko Hosho
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Junichi Okano
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
| | - Yoshikazu Murawaki
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8504, Japan
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Kishina M, Koda M, Tokunaga S, Miyoshi K, Fujise Y, Kato J, Matono T, Sugihara T, Murawaki Y. Usefulness of contrast-enhanced ultrasound with Sonazoid for evaluating liver abscess in comparison with conventional B-mode ultrasound. Hepatol Res 2015; 45:337-42. [PMID: 24773617 DOI: 10.1111/hepr.12347] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 04/12/2014] [Accepted: 04/23/2014] [Indexed: 12/08/2022]
Abstract
AIM The purpose of this study was to evaluate the usefulness of contrast-enhanced ultrasound (CEUS) with Sonazoid (perfluorobutane) in patients with liver abscess. Sonazoid is a contrast agent with a low mechanical index and is phagocytosed by Kupffer cells. METHODS Twenty-two patients with liver abscess were evaluated with conventional US, real-time CEUS with Sonazoid, and enhanced computed tomography (CT). After 0.5 mL of Sonazoid was administrated i.v., CEUS images in the vascular and post-vascular phases were observed. RESULTS Conventional US showed hypoechoic lesions in 13 (59.1%), isoechoic in four (18.2%), hyperechoic in two (9.1%), mixed echoic in two (9.1%) and undetected in one (4.8%) patient. CEUS showed perilesional enhancement in 19 (86.4%) lesions in the vascular phase and well-defined unenhanced areas in 22 (100%) lesions in the post-vascular phase. CEUS revealed that 18 abscesses were cystic type and three were honeycomb type. Twenty-one abscesses (95.5%) had clearer appearances on CEUS than on conventional US in regard to the extent of necrotic or liquefied lesions seen. We could confirm reduction of the lesions after therapy in 13 (92.9%) of 14 patients followed up by CEUS. CONCLUSION Most of the liver abscesses showed perilesional enhancement in the vascular phase and unenhanced areas in the post-vascular phase. The appearance of liver abscesses was clearer on CEUS than on conventional US. CEUS with Sonazoid can be a more effective diagnostic and therapeutic tool for liver abscess.
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Affiliation(s)
- Manabu Kishina
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Tottori University School of Medicine, Yonago, Japan
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Imamoto R, Okano JI, Sawada S, Fujise Y, Abe R, Murawaki Y. Null anticarcinogenic effect of silymarin on diethylnitrosamine-induced hepatocarcinogenesis in rats. Exp Ther Med 2013; 7:31-38. [PMID: 24348760 PMCID: PMC3861306 DOI: 10.3892/etm.2013.1391] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 10/28/2013] [Indexed: 12/25/2022] Open
Abstract
The aim of this study was to investigate the anticarcinogenic effects of silymarin in diethylnitrosamine (DEN)-induced hepatocarcinogenic rat models. Severe and mild models of hepatocellular carcinoma (HCC) were generated by the intraperitoneal administration of 40 mg/kg DEN once a week for 18 weeks and 100 mg/kg DEN every 2 weeks for 6 weeks in male Wistar rats, respectively. In the severe and mild models of HCC, the rats were treated with 0.1 and 0.5% silymarin for 18 weeks and with 0.1% silymarin for 5 weeks, respectively. Serum transaminase levels were not significantly decreased by the silymarin treatment in either model. Macroscopic and microscopic features indicated that the silymarin-containing formulations did not significantly inhibit the hepatic tumor formation induced by DEN. Furthermore, immunohistochemical and western blot analyses demonstrated that the expression levels of proliferating cell nuclear antigen and glutathione S-transferase P, which are hepatocarcinogenic markers, were not significantly modified by the silymarin treatment. These results indicate that silymarin may not be considered as a candidate agent against hepatocarcinogenesis.
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Affiliation(s)
- Ryu Imamoto
- Second Department of Internal Medicine, Tottori University School of Medicine, Yonago, Tottori 683-8504, Japan
| | - Jun-Ichi Okano
- Second Department of Internal Medicine, Tottori University School of Medicine, Yonago, Tottori 683-8504, Japan
| | - Shintaro Sawada
- Second Department of Internal Medicine, Tottori University School of Medicine, Yonago, Tottori 683-8504, Japan
| | - Yuki Fujise
- Second Department of Internal Medicine, Tottori University School of Medicine, Yonago, Tottori 683-8504, Japan
| | - Ryo Abe
- Second Department of Internal Medicine, Tottori University School of Medicine, Yonago, Tottori 683-8504, Japan
| | - Yoshikazu Murawaki
- Second Department of Internal Medicine, Tottori University School of Medicine, Yonago, Tottori 683-8504, Japan
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Koda M, Tokunaga S, Miyoshi K, Kishina M, Fujise Y, Kato J, Matono T, Murawaki Y, Kakite S, Yamashita E. Ablative margin states by magnetic resonance imaging with ferucarbotran in radiofrequency ablation for hepatocellular carcinoma can predict local tumor progression. J Gastroenterol 2013; 48:1283-92. [PMID: 23338488 DOI: 10.1007/s00535-012-0747-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Accepted: 12/25/2012] [Indexed: 02/04/2023]
Abstract
BACKGROUND Our aim was to determine how well ablative margin (AM) grading assessed by magnetic resonance imaging (MRI) with ferucarbotran administered prior to radiofrequency ablation (RFA) predicts local tumor progression in comparison with enhanced computed tomography (CT). METHODS 101 hepatocellular carcinomas were treated by RFA after ferucarbotran administration. We performed T2*-weighted MRI after 1 week and enhanced CT after 1 month. The assessment was categorized in three grades: AM(+): high-intensity area with continuous low-intensity rim; AM zero: high-intensity area with discontinuous low-intensity rim; and AM(-): high-intensity area extending beyond the low-intensity rim. RESULTS AM(+), AM zero, AM(-) and indeterminable were found in 47, 36, 8 and 10 nodules, respectively. The overall agreement rate between MRI and enhanced CT for the diagnosis of AM was 71.3%. The κ coefficient was 0.523 (p < 0.001), indicating moderate agreement. Multivariate logistic regression showed that a significant factor for the achievement of AM(+) on MRI was only segment location (odds ratio 5.9, non-segment 4 + 8 vs. segment 4 + 8). The cumulative local tumor progression rates (4.4, 7.6, and 7.6% in 1, 2, and 3 years) in 47 AM(+) nodules were significantly lower than those (13.9, 33.4, and 41.8% in 1, 2, and 3 years) in 36 AM zero nodules. A multivariate Cox proportional hazards model identified contiguous vessels (odds ratio 12.0) and AM(+) on MRI (odds ratio 0.19) as independent factors for local tumor progression. CONCLUSION AM assessment by MRI using ferucarbotran can predict local tumor progression after RFA and enable early and less invasive diagnosis.
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Affiliation(s)
- Masahiko Koda
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Tottori University, Yonago, 683-8504, Japan,
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Tokunaga S, Koda M, Kato J, Miyoshi K, Kishina M, Fujise Y, Matono T, Murawaki Y. Assessment of track microbubble flow signals on contrast-enhanced ultrasound with perflubutane following percutaneous liver biopsy. Intern Med 2013; 52:1455-9. [PMID: 23812191 DOI: 10.2169/internalmedicine.52.9584] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE It is important to detect post-liver biopsy hemorrhage early and confirm hemostasis in the clinical setting. Contrast-enhanced ultrasound (CEUS) is a sensitive and highly specific tool for detecting active bleeding. The aim of this study was to investigate the rate of detection of track microbubble flow signals on CEUS with perflubutane following liver biopsy and to assess the disappearance of these signals. METHODS Microbubble flow signals along the needle track on CEUS were examined in 100 patients who underwent percutaneous US-guided liver biopsies. The microbubble flow signals were examined repeatedly until their disappearance. The patients were followed up with clinical and laboratory data to detect clinically significant hemorrhaging. RESULTS Microbubble flow signals on CEUS following percutaneous liver biopsy were seen in 33% of the patients. There were no significant differences in the platelet count, prothrombin time or length of the biopsy specimen between the patients with and those without microbubble flow signals on CEUS. The microbubble flow signals disappeared over time in all patients. There were no cases of clinically significant hemorrhaging in the present study. CONCLUSION Track microbubble flow signals on CEUS are frequently observed after biopsies. The disappearance of a microbubble flow signal is a useful index for confirming hemostasis of postbiopsy hemorrhaging.
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Affiliation(s)
- Shiho Tokunaga
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Tottori University School of Medicine, Japan
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Abe R, Okano JI, Imamoto R, Fujise Y, Koda M, Murawaki Y. [Evaluation of the surveillance program for hepatocellular carcinoma]. Nihon Shokakibyo Gakkai Zasshi 2012; 109:741-750. [PMID: 22688099] [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: 06/01/2023]
Abstract
We examined the compliance with, and efficacy of, the clinical guideline for the diagnosis of hepatocellular carcinoma (HCC). We classified 74 patients with HCC into 3 categories;23 surveillance cases, 18 non-surveillance cases, and 33 incidental cases. Patients from affiliated hospitals included more non-surveillance and incidental cases than in university hospital-treated cases. HCC was diagnosed at an earlier stage in the surveillance group than the incidental group, and the surveillance group had a better outcome than the incidental group. There was no significant difference in HCC stage or outcome between surveillance and non-surveillance groups. The guidelines appeared to be useful for early diagnosis of HCC except for the fact that some in the surveillance group were diagnosed at an advanced stage and around 30% of the incidental group had some risk factors of HCC. Those conducting surveillance must improve their skills for early diagnosis of HCC and both doctors and patients must increase compliance with the guidelines.
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Affiliation(s)
- Ryo Abe
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Tottori University School of Medicine
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Abe R, Okano JI, Imamoto R, Fujise Y, Murawaki Y. Sequential analysis of diethylnitrosamine-induced hepatocarcinogenesis in rats. Exp Ther Med 2011; 3:371-378. [PMID: 22969898 DOI: 10.3892/etm.2011.419] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2011] [Accepted: 12/08/2011] [Indexed: 12/22/2022] Open
Abstract
In the present study, we examined the sequential changes of diethylnitrosamine (DEN)-induced hepatocarcinogenesis in Wistar rats. After 14 weeks of DEN treatment, hyperplastic nodules developed as a consequence of the appearance of renewed hepatocytes, degenerated hepatocytes, oval cells and fibrotic changes. Total bilirubin and alanine aminotransferase levels were significantly higher in the DEN group compared to the control group throughout the experimental period. Our data may prove beneficial to future analyses of chemopreventive compounds during various stages of hepatocarcinogenesis in rats.
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Affiliation(s)
- Ryo Abe
- Second Department of Internal Medicine, Tottori University School of Medicine, Yonago, Tottori 683-8504, Japan
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Koda M, Tokunaga S, Miyoshi K, Kishina M, Fujise Y, Kato J, Matono T, Okamoto K, Murawaki Y, Kakite S. Assessment of ablative margin by unenhanced magnetic resonance imaging after radiofrequency ablation for hepatocellular carcinoma. Eur J Radiol 2011; 81:2730-6. [PMID: 22137612 DOI: 10.1016/j.ejrad.2011.11.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Revised: 10/30/2011] [Accepted: 11/01/2011] [Indexed: 12/15/2022]
Abstract
PURPOSE The aim of this study was to evaluate the feasibility of magnetic resonance imaging (MRI) without a contrast agent to visualize the ablative margin after radiofrequency ablation (RFA) for hepatocellular carcinoma (HCC), compared with enhanced CT. METHODS Twenty-five HCCs in 19 patients were treated by RFA. T1-weighted MRI was performed before and after RFA, and the signal intensities of the tumors and surrounding liver tissues were measured. Treatment efficacy was assessed based on three grades: margin (+), a continuous high-intensity rim around the index tumor; margin zero, a partially discontinuous high-intensity rim; margin (-), the tumor extends beyond the high-intensity rim. RESULTS Twelve (86%) of fourteen low-intensity tumors on the pre-MRI were visualized as low-intensity tumors on post-MRI, and the ablative margins were visualized as high-intensity rims. Two (67%) of three high-intensity tumors on pre-MRI were visualized as higher-intensity tumors in the high-intensity ablative margin. Because the signal intensities of tumors and surrounding tissues in 14 tumors that were low- or high-intensity tumors on pre-MRI increased to the same extent, the tumors and ablative margin could be distinguished on post images. In 6 (75%) of the 8 iso-intensity tumors on pre-MRI, the ablative margin and tumor could also not be discriminated on post-MRI. The overall agreement between MRI and CT for the ablative margin was good (κ coefficient=0.716, p=0.00002). CONCLUSION In 82% of low- or high-intensity tumors on pre-MRI, post-MRI without a contrast agent enabled visualization of the ablative margin as a high-intensity rim, and it was possible to evaluate the ablative margin earlier and easier than with enhanced CT.
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Affiliation(s)
- Masahiko Koda
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Tottori University School of Medicine, Yonago 683-8504, Japan.
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Abstract
Since the majority of hepatocellular carcinoma (HCC) arises from a background of chronic liver diseases caused by infection with hepatitis C virus (HCV) and hepatitis B virus (HBV), chemoprevention targeting patients at high risk of HCC is feasible. In this review article, we summarize current knowledge of chemoprevention against HCC mostly using phytochemicals which have less toxicity than pharmaceutical agents. We describe in vivo and in vitro evidence and proposed mechanisms of beneficial effects of several compounds on the liver, including acyclic retinoid (ACR), angiotensin-converting enzyme inhibitors (ACEIs), caffeine, capsaicin, cepharanthine (CEP), cinnamaldehyde, curcumin, diallyl sulfide (DAS), eicosapentaenoic acid (EPA), epigallocatechin-3-gallate (EGCG), genistein, lycopene, resveratrol, silymarin, sulforaphane (SFN), and xanthohumol (XN). Because antihepatocarcinogenic effects by these compounds are mostly based on experimental studies, clinical evidence is urgently necessary.
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Affiliation(s)
- Jun-Ichi Okano
- Second Department of Internal Medicine, Tottori University School of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan.
| | - Yuki Fujise
- Second Department of Internal Medicine, Tottori University School of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Ryo Abe
- Second Department of Internal Medicine, Tottori University School of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Ryu Imamoto
- Second Department of Internal Medicine, Tottori University School of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
| | - Yoshikazu Murawaki
- Second Department of Internal Medicine, Tottori University School of Medicine, 36-1 Nishi-cho, Yonago, Tottori, 683-8504, Japan
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Koda M, Tokunaga S, Fujise Y, Kato J, Matono T, Sugihara T, Nagahara T, Ueki M, Murawaki Y, Kakite S, Yamashita E. Assessment of ablative margin after radiofrequency ablation for hepatocellular carcinoma; comparison between magnetic resonance imaging with ferucarbotran and enhanced CT with iodized oil deposition. Eur J Radiol 2011; 81:1400-4. [PMID: 21440397 DOI: 10.1016/j.ejrad.2011.03.004] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Accepted: 03/02/2011] [Indexed: 10/18/2022]
Abstract
BACKGROUND AND PURPOSE Our aim was to investigate whether magnetic resonance imaging (MRI) with ferucarbotran administered prior to radiofrequency ablation could accurately assess ablative margin when compared with enhanced computed tomography (CT) with iodized oil marking. MATERIALS AND METHODS We enrolled 27 patients with 32 hepatocellular carcinomas in which iodized oil deposits were visible throughout the nodule after transcatheter arterial chemoembolization. For these nodules, radiofrequency ablation was performed after ferucarbotran administration. We then performed T2-weighted MRI after 1 week and enhanced CT after 1 month. T2-weighted MRI demonstrated the ablative margin as a low-intensity rim. We classified the margin into three grades; margin (+): high-intensity area with a continuous low-intensity rim; margin zero: high-intensity area with a discontinuous low-intensity rim; and margin (-): high-intensity area extending beyond the low-intensity rim. RESULTS In 28 (86%) of 32 nodules, there was agreement between MRI and CT. The overall agreement between for the two modalities in the assessment of ablative margin was good (κ=0.759, 95% confidence interval: 0.480-1.000, p<0.001). In four nodules, ablative margins on MRI were underestimated by one grade compared with CT. CONCLUSION MRI using ferucarbotran is less invasive and allows earlier assessment than CT. The MRI technique performed similarly to enhanced CT with iodized oil marking in evaluating the ablative margin after radiofrequency ablation.
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Affiliation(s)
- Masahiko Koda
- Division of Medicine and Clinical Science, Department of Multidisciplinary Internal Medicine, Tottori University School of Medicine, 36-1 Nishicho, Yonago 683-8504, Japan.
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Watanabe M, Kato K, Takeda K, Konishi T, Kurai J, Tatsukawa T, Yamamoto H, Tamura Y, Ishikawa S, Kawasaki Y, Morita M, Yoneda K, Fujise H, Fujise Y, Fujise K, Yamaguchi K, Hayabuchi T, Shigeshiro K, Katayama S, Chikumi H, Igishi T, Yamasaki A, Hasegawa Y, Okazaki R, Burioka N, Shimizu E. Difference of health-care associated pneumonia between large hospitals and small hospitals in Japan. J Med Invest 2011; 58:67-74. [DOI: 10.2152/jmi.58.67] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- Masanari Watanabe
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
- Motomachi Hospital
| | | | | | | | - Jun Kurai
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
- Chukai Clinic
| | | | | | | | | | - Yuji Kawasaki
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | | | - Kazuhiko Yoneda
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | | | - Yuki Fujise
- Motomachi Hospital
- The Second Department of Internal Medicine, Faculty of Medicine, Tottori University
| | | | | | | | | | | | - Hiroki Chikumi
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | - Tadashi Igishi
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | - Akira Yamasaki
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | - Yasuyuki Hasegawa
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | - Ryota Okazaki
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | - Naoto Burioka
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
| | - Eiji Shimizu
- Department of Respirology and Rheumatology, Faculty of Medicine, Tottori University
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Fujise Y, Koda M, Kato J, Tokunaga S, Matono T, Sugihara T, Nagahara T, Ueki M, Okamoto K, Oyama K, Okano JI, Maeda N, Kuwamoto S, Murawaki Y. Drug-induced hepatic injury caused by an aldose reductase inhibitor, epalrestat. ACTA ACUST UNITED AC 2011. [DOI: 10.2957/kanzo.52.351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Nagahara T, Okano JI, Fujise Y, Abe R, Murawaki Y. Preventive effect of JTE-522, a selective cyclooxygenase-2 inhibitor, on DEN-induced hepatocarcinogenesis in rats. Biomed Pharmacother 2010; 64:319-26. [PMID: 20434301 DOI: 10.1016/j.biopha.2009.09.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2009] [Accepted: 09/01/2009] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Chemopreventive effect of a selective cyclooxygenase-2 (COX-2) inhibitor JTE-522 on diethylnitrosamine (DEN)-induced hepatocarcinogenesis was evaluated in Wistar rats. METHODS Animals in the control group (G1) were injected with phosphate buffered saline (PBS), those in hepatocellular carcinoma (HCC) group (G2) were injected with DEN with regular foods for 14 weeks, and those in the treatment groups were injected with DEN for 14 weeks fed with JTE-522 for 7 (G3) and 14 weeks (G4), respectively. Proliferation and precancerous lesions were evaluated by expression levels of proliferating cell nuclear antigen (PCNA) and glutathione S-transferase-P (GST-P), respectively by immunohistochemistry and Western blot analysis. Apoptosis and oxidative stress were evaluated by TdT-mediated dUTP-biotin nick-end labeling (TUNEL) and 8-hydroxy-2'-deoxyguanosine (8-OHdG) staining, respectively. RESULTS After 14 weeks of the treatment, HCC was developed in G2, G3, and G4 showing no significant differences in gross appearance and histology of the liver among the three groups. There were no significant differences in the expression levels of PCNA and numbers of TUNEL and 8-OHdG positive cells in the liver among the three groups. However, GST-P positive area was significantly suppressed in G3 and G4 compared to G2. CONCLUSION Our data revealed that JTE-522 had a modest inhibitory effect on hepatocarcinogenesis in rats in a manner independent of induction of apoptosis and inhibition of oxidative stress.
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Affiliation(s)
- Takakazu Nagahara
- Second Department of Internal Medicine, Tottori University School of Medicine, 36-1 Nishi-cho, Yonago, Tottori 683-8504, Japan.
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Watanabe H, Tateno H, Kusakabe H, Matsuoka T, Kamiguchi Y, Fujise Y, Ishikawa H, Ohsumi S, Fukui Y. Fertilizability and chromosomal integrity of frozen-thawed Bryde's whale (Balaenoptera edeni) spermatozoa intracytoplasmically injected into mouse oocytes. ZYGOTE 2007; 15:9-14. [PMID: 17391541 DOI: 10.1017/s0967199406003923] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Prior to attempting the in vitro production of embryos in the Bryde's whale (Balaenoputera edeni), we investigated whether spermatozoa can retain the capacity for oocyte activation and pronucleus formation as well as chromosomal integrity under cryopreservation by using intracytoplasmic sperm injection (ICSI) into mouse oocytes. Regardless of motility and viability, whale spermatozoa efficiently led to the activation of mouse oocytes (90.3-97.4%), and sperm nuclei successfully transformed into male pronucleus within activated ooplasm (87.2-93.6%). Chromosome analysis at the first cleavage metaphase (M) of the hybrid zygotes revealed that a majority (95.2%) of motile spermatozoa had the normal chromosome complement, while the percentage of chromosomal normality was significantly reduced to 63.5% in immotile spermatozoa and 50.0% in dead spermatozoa due to the increase in structural chromosome aberrations. This is the first report showing that motile Bryde's whale spermatozoa are competent to support embryonic development.
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Affiliation(s)
- H Watanabe
- Department of Animal Production Science, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Japan
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Watanabe H, Tateno H, Kusakabe H, Kamiguchi Y, Fujise Y, Ishikawa H, Ohsumi S, Fukui Y. 381 FERTILIZABILITY AND CHROMOSOMAL INTEGRITY OF FROZEN - THAWED BRYDE's WHALE (BALAENOPTERA EDENI) SPERMATOZOA INTRACYTOPLASMICALLY INJECTED INTO MOUSE OOCYTES. Reprod Fertil Dev 2007. [DOI: 10.1071/rdv19n1ab381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
In this study, we applied intracytoplasmic sperm injection (ICSI) to mouse oocytes to evaluate the fertilizability and chromosomal integrity of the three types of frozen–thawed Bryde's whale spermatozoa. B6D2F1 female mice (7–11 weeks of age) were superovulated by injections of PMSG followed by hCG 48 h later. The oocytes recovered from oviducts between 14 and 16 h after hCG injection were denuded of their cumulus cells. Sperm samples were obtained from a Bryde's whale (Balaenoptera edeni) captured under the Japanese Whale Research Program with Special Permit in the Western North Pacific between May and August 2003 (presumptive feeding season). The whale was killed by an explosive harpoon which has been recognized as the best humane method for whales by the International Whaling Commission (IWC) and stipulated by Schedule III (Capture) of the International Convention for the Regulation of Whaling. Spermatozoa collected from vasa deferentia were cryopreserved. Frozen Bryde's whale spermatozoa were thawed at 37�C and washed with HEPES-TYH by centrifugation at 500g for 5 min. Motile and immotile spermatozoa were obtained, and some spermatozoa in HEPES-TYH were refrozen without cryoprotectant at -20�C to be completely killed. Within 24 h, they were thawed at 37�C and prepared for ICSI. Comparison of group values was performed by either Fisher's exact probability test or chi-square test where necessary. Differences at P d 0.05 were considered significant. Chromosomal normality was determined by analyses of karyotyped haploid chromosomes (n = 22) of the whale sperm. Regardless of motility and viability, whale spermatozoa efficiently led to the activation of mouse oocytes (90.3–97.4%), and sperm nuclei successfully transformed into male pronuclei within activated ooplasm (87.2–93.6%). Chromosome analysis at the first cleavage metaphase of the hybrid zygotes revealed that a majority (95.2%) of motile spermatozoa had the normal chromosome complement, whereas the percentage of chromosomal normality was significantly (P ≤ 0.001) reduced to 63.5% in immotile spermatozoa and 50.0% in dead spermatozoa, due to the increase in structural chromosome aberrations such as chromosome fragments. This is the first report showing that motile Bryde's whale spermatozoa are competent to support embryonic development. Furthermore, we have shown that chromosomal analysis of whale spermatozoa is a useful technique for measuring the influences of marine pollution on reproduction in cetacean species that occupy the top niche in the marine ecosystem.
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Honda K, Aoki M, Fujise Y. Ecochemical approach using mercury accumulation of Antarctic minke whale, Balaenoptera bonaerensis, as tracer of historical change of Antarctic marine ecosystem during 1980-1999. Bull Environ Contam Toxicol 2006; 76:140-7. [PMID: 16404672 DOI: 10.1007/s00128-005-0900-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2005] [Accepted: 11/07/2005] [Indexed: 05/06/2023]
Affiliation(s)
- K Honda
- Department of Environmental Science for Industry, Ehime University, 3-5-7 Tarumi, Matsuyama 790-8566, Japan
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Masumoto K, Yamada I, Tanaka H, Fujise Y, Hashimoto K. Tissue distribution of a new photosensitizer ATX-S10Na(II) and effect of a diode laser (670 nm) in photodynamic therapy. Lasers Med Sci 2004; 18:134-8. [PMID: 14505196 DOI: 10.1007/s10103-003-0268-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2003] [Accepted: 07/08/2003] [Indexed: 12/30/2022]
Abstract
The aims of the present study were to analyse the quantitative tissue distribution of ATX-S10Na(II) and to investigate the maximal effect of a diode laser and the irradiation conditions required to obtain this effect in photodynamic therapy (PDT) with ATX-S10Na(II). Spectrofluorometry was used to obtain quantitative tissue distribution of ATX-S10Na(II) in Colon 26 carcinoma-bearing mice as a function of time following administration. Next, transplanted tumours of mice with or without ATX-S10Na(II) were treated with the diode laser under conditions in which power density and irradiation time were varied. Tumour tissue concentrations of ATX-S10Na(II) were higher than in all tissues at all intervals following administration. The uptake of ATX-S10Na(II) by most tissues was rapid, with maximal concentrations occurring 1 h after i.v. injection, and ATX-S10Na(II) was almost excreted within 24 h after administration. The maximal depth of necrosis induced by PDT in the treated tumour was 7.9 mm under conditions in which power density was 160 mW/cm2 and total dose was above 100 J/cm2. PDT with ATX-S10Na(II) and the diode laser is useful for the treatment of superficial cancers.
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Affiliation(s)
- K Masumoto
- Department of Chemistry, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu 431-3192, Japan
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Otake M, Nishiwaki M, Kobayashi Y, Baba S, Kohno E, Kawasaki T, Fujise Y, Nakamura H. Selective accumulation of ALA-induced PpIX and photodynamic effect in chemically induced hepatocellular carcinoma. Br J Cancer 2003; 89:730-6. [PMID: 12915887 PMCID: PMC2376916 DOI: 10.1038/sj.bjc.6601135] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The possibility of 5-aminolaevulinic acid-based photodynamic therapy (ALA-PDT) for liver cancer was investigated using a chemically induced hepatocellular carcinoma (HCC) model. Endogenously synthesised protoporphyrin IX (PpIX) following the administration of ALA is an effective photosensitiser for PDT. We determined the fluorescence intensity of PpIX in HCC and nontumoral tissue in the liver. 5-Aminolaevulinic acid was intravenously injected to male Fisher rats with HCC at a dose of 500 mg x kg(-1), and the fluorescence intensity in each tissue sample excised from liver was measured with a spectrofluorometer at 1, 3 and 6 h after administration. Fluorescence intensity was at a peak of 3 h after administration in both HCC and nontumoral tissue. The accumulation of PpIX in HCC was higher than that in the nontumoral tissue at 1 h (P<0.001) and 3 h (P<0.05) after ALA administration. Based on these results, PDT was performed on HCC at 3 h after 500 mg x kg(-1) ALA administration before laser irradiation of 30 J per tumour. Antitumour effect was more evident in HCC than in the nontumoral tissue surrounding HCC. These findings suggest the possibility to detect HCC by fluorescence and to treat HCC by light.
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Affiliation(s)
- M Otake
- Second Department of Internal Medicine, Hamamatsu University School of Medicine, Handayama 1-20-1, Hamamatsu, Shizuoka 431-3192, Japan.
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Takahira R, Yonemura K, Fujise Y, Hishida A. Dexamethasone attenuates neutrophil infiltration in the rat kidney in ischemia/reperfusion injury: the possible role of nitroxyl. Free Radic Biol Med 2001; 31:809-15. [PMID: 11557319 DOI: 10.1016/s0891-5849(01)00658-x] [Citation(s) in RCA: 35] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Neutrophil infiltration to the tissue, which is one of the important pathogenetic factors in ischemia/reperfusion injury, can be inhibited by glucocorticoids. The purpose of the present study was to clarify the mechanisms by which glucocorticoids inhibit neutrophil infiltration in renal ischemia/reperfusion injury in rats. Pretreatment with dexamethasone significantly attenuated the enhanced neutrophil infiltration and expression of intercellular adhesion molecule-1 induced by renal ischemia/reperfusion. Treatment with nitroxyl anion releaser known as Angeli's salt abolished the beneficial effect of dexamethasone in renal ischemia/reperfusion. Renal dysfunction and tubular damage induced by renal ischemia/reperfusion were not ameliorated by pretreatment with dexamthasone. These results indicate that the attenuation by dexamethasone of neutrophil infiltration and intercellular adhesion molecule-1 expression during renal ischemia/reperfusion may be mediated by the suppressed production of nitroxyl anion. Thus, neutrophil infiltration in renal ischemia/reperfusion injury may be mediated, at least in part, by the enhanced production of nitroxyl anion.
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Affiliation(s)
- R Takahira
- First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
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Abstract
Urinary trypsin inhibitor (UTI) has several roles other than protease inhibition. It is suggested that UTI inhibits calcium influx in cultured cells and that the chondroitin sulfate chain of UTI may play an important role. In order to clarify the mechanistic features of this phenomenon, the chondroitin sulfate chain of UTI was analyzed by (1)H-NMR. The samples were highly purified UTI dissolved in D(2)O in the presence or absence of Ca(2+), Mg(2+) and Na(+). 1D-spectra were obtained and T(1) values of detected signals were estimated from the inversion-recovery method. The addition of Ca(2+) to UTI caused a chemical shift to downfield, line broadening and a reduction of T(1) values at several signals from chondroitin sulfate moiety (especially at axial H-2 of GalNAc), whereas Mg(2+) and Na(+) had no significant effect. Some of the signals in the linkage region of chondroitin sulfate chain showed marked line broadening by Ca(2+). The reduction of T(1) values implies formation of a complex. It is suggested that Ca(2+) generates the sulfate salt and interacts with other polar groups in the chondroitin sulfate chain, thereby causing bridging between UTI molecules. Several properties of UTI may be related to this interaction of Ca(2+) with chondroitin sulfate chains.
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Affiliation(s)
- M Masui
- Department of Obstetrics and Gynecology, Hamamatsu University School of Medicine, 3600 Handa-cho, Hamamatsu 431-3192, Japan.
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Abstract
PURPOSE Neither serum creatinine concentration nor creatinine clearance assess renal function accurately. Serum creatinine concentration is affected by muscle mass, and the creatinine clearance overestimates the glomerular filtration rate because of tubular secretion of creatinine. The present study was designed to determine whether serum concentrations of 2-(alpha-mannopyranosyl)-L-tryptophan (MPT), a tryptophan glycoconjugate, can be used as a marker of renal function. METHODS Clearances of MPT and of inulin were compared in normal rats and in rats with cisplatin-induced acute renal failure. We also compared the clearances of MPT and of creatinine with inulin clearance in 25 patients with chronic renal disease. Serum concentrations of MPT and creatinine as a function of MPT clearance were determined in 108 patients with chronic renal disease. RESULTS There was strong linear correlation between clearances of MPT and inulin in rats (r = 0.97) and humans (r = 0.87), indicating that renal handling of MPT is similar to that of inulin. In humans, linear regression analyses indicated that MPT was a better indicator of inulin clearance than was creatinine clearance. At the same level of renal function, serum creatinine concentrations tended to be lower in patients with less muscle mass (as indicated by a urinary creatinine excretion <1,000 mg in 24 hours) than in those who excreted >1,000 mg in 24 hours, whereas serum MPT concentrations were not affected by creatinine excretion. CONCLUSION MPT clearance can replace inulin clearance in the clinical setting. The serum MPT concentration is an accurate measure of renal function even in patients with diminished muscle mass, and thus is a better indicator of renal function than is the serum creatinine concentration.
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Affiliation(s)
- R Takahira
- First Department of Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
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Teramitsu I, Yamamoto Y, Chiba I, Iwata H, Tanabe S, Fujise Y, Kazusaka A, Akahori F, Fujita S. Identification of novel cytochrome P450 1A genes from five marine mammal species. Aquat Toxicol 2000; 51:145-153. [PMID: 11064121 DOI: 10.1016/s0166-445x(00)00113-2] [Citation(s) in RCA: 15] [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: 05/23/2023]
Abstract
Marine mammals, being endangered by the chronic exposure of hydrophobic environmental contaminants as an assorting result of global pollution, are especially focused as indicators for organochlorine pollution. The use of contaminant-induced xenobiotic metabolizers, particularly P450 (CYP) 1A, in marine mammals can be effective as potential biomarkers of the contaminant exposure and/or toxic effects. In this study, we identified the first marine mammalian CYPs. Six novel CYP1A cDNA fragments were cloned from the livers of marine mammal species, minke whale (Balaenoptera acutorostrata), dall's porpoise (Phocoenoides dalli), steller sea lion (Eumetopias jubatus), largha seal (Phoca largha), and ribbon seal (Phoca fasciata) by the method of reverse transcription/polymerase chain reaction (RT/PCR); two distinct fragments were from steller sea lion and one fragment each was obtained from the other species. Five of the fragments, one from each species, were classified in the subfamily of CYP1A1, and the other fragment cloned from steller sea lion was designated CYP1A2. Degenerate PCR primers were used to amplify the fragments from liver cDNAs. The deduced amino acid sequences of these fragment CYP1As showed identities ranging from 50.0 to 94.3% with other known vertebrate CYPs in the subfamily of CYP1A, including those from fish, chicken, and terrestrial mammals. The isolated fragments were used to construct a molecular phylogeny, along with other vertebrate CYP1A cDNAs cut down in size to the corresponding region of 265 bp in which those newly determined fragments were cloned. This phylogenetic analysis by the maximum parsimony method using the PHYLIP program suggests two distinct evolutional pathways for aquatic mammalian CYP1As, compatible to a conservative taxonomy. Pinniped genes are clustered together with dog gene, forming a carnivore group, and cetaceans form another branch. Identification of CYP1A genes in marine mammals will be an introductory step to provide new insights into the metabolic or toxicological functions of CYP1As in these animals.
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Affiliation(s)
- I Teramitsu
- Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, 060-0818, Sapporo, Japan
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Eguchi M, Kondoh S, Takagi Y, Tsuchihashi K, Abiru M, Minatoya Y, Seino R, Fujise Y. Giant noninflammatory and nonatherosclerotic coronary arterial aneurysm in the left main trunk assessed by intravascular ultrasound imaging--a case report. Angiology 2000; 51:599-602. [PMID: 10917585 DOI: 10.1177/000331970005100709] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A case of a giant noninflammatory and nonatherosclerotic coronary arterial aneurysm in the left main trunk of a 69-year-old female is reported. Preoperative intravascular ultrasound (IVUS) images were helpful for visualizing the morphologic and histologic features of the coronary aneurysm. They were also useful for determining the etiologic background and surgical procedure.
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Affiliation(s)
- M Eguchi
- Second Department of Internal Medicine, Sapporo Medical University School of Medicine, Japan.
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29
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Suzuki S, Serizawa A, Sakaguchi T, Tsuchiya Y, Kojima Y, Okamoto K, Kurachi K, Konno H, Fujise Y, Baba S, Nakamura S. The roles of platelet-activating factor and endothelin-1 in renal damage after total hepatic ischemia and reperfusion. Transplantation 2000; 69:2267-73. [PMID: 10868624 DOI: 10.1097/00007890-200006150-00008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND This study was designed to verify the involvement of platelet-activating factor (PAF) in renal damage associated with hepatic ischemia and reperfusion (HIR) injury through the release of endothelin (ET)-1 and to determine the modulating effect of a specific PAF receptor antagonist on these insults in rats. METHODS Male rats pretreated with either normal saline as a vehicle (NS group) or intravenous TCV-309, a PAF receptor antagonist (TCV group), were subjected to 120 min of total hepatic ischemia under an extracorporeal portosystemic shunt. Plasma aspartate transaminase, creatinine, blood urea nitrogen, and ET-1 levels and the relative renal wet weight were determined under nonischemic conditions and at 1, 3, and 6 hr of reperfusion after hepatic ischemia. Changes in mean arterial blood pressure and renal tissue blood flow measurements in the kidney were determined throughout the experiment. RESULTS Increased plasma aspartate transaminase, creatinine, blood urea nitrogen, and ET-1 levels and the relative renal wet weight after HIR in the NS group were significantly suppressed by TCV-309 pretreatment. Mean arterial blood pressure and renal tissue blood flow after HIR in the TCV group were significantly improved when compared with those in the NS group. These effects resulted in attenuation of structural hepatic and renal damage with the improvement of 7-day survival (62%). CONCLUSIONS The present study demonstrates that renal damage as well as critical liver injury is produced after reperfusion following 120 min of total hepatic ischemia. A PAF receptor antagonist may be therapeutically useful to protect against these types of damage via indirect modulation of plasma ET-1 levels.
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Affiliation(s)
- S Suzuki
- Department of Surgery II, Hamamatsu University School of Medicine, Japan.
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30
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Iimuro M, Kaneko M, Matsumoto Y, Fujise Y, Watanabe T, Hayashi H. Effects of an endothelin receptor antagonist TAK-044 on myocardial energy metabolism in ischemia/reperfused rat hearts. J Cardiovasc Pharmacol 2000; 35:403-9. [PMID: 10710125 DOI: 10.1097/00005344-200003000-00009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The purpose of this study was to investigate the effects of an endothelin-receptor antagonist TAK-044 on functional defects and metabolic derangement in myocardial ischemia/reperfusion injury. We sequentially measured high-energy phosphate metabolites and intracellular pH by phosphorus magnetic resonance spectroscopy during 35-min global ischemia followed by 60-min reperfusion in Langendorff-perfused rat hearts. TAK-044 (initial loading by 3 mg/kg followed by perfusion with 100 nM solution) was administered in two different ways: before ischemia or immediately after reperfusion. In addition, we investigated the effects of TAK-044 on functional defects and metabolic alterations induced by hydrogen peroxide (200 microM, 30 min). The recoveries of left ventricular developed pressure after reperfusion in TAK-044 groups (51 +/-12% in TAK-I, 61 +/- 12% in TAK-R) were better than in control (10 +/- 5% in control; p < 0.01). Increases in left ventricular end-diastolic pressure (LVEDP) in TAK-044 groups (22 +/- 5 mm Hg in TAK-I, 24 +/- 5 mm Hg in TAK-R) were less than in control (38 +/- 3 mm Hg; p < 0.01). Adenosine triphosphate (ATP) (33 +/- 5% in TAK-I, 28 +/- 4% in TAK-R) in TAK-044 groups were higher than in control (13 +/- 3%; p < 0.01). The creatine phosphokinase (CPK) release during reperfusion in TAK-044 groups (3.3 +/- 1.5 IU/g wet wt/60 min in TAK-I, 3.5 +/- 2.5 IU/g wet wt/60 min in TAK-R) were lower than in control (13.8 +/- 3.9 IU/g wet wt/60 min; p < 0.05). In contrast, TAK-044 did not attenuate the myocardial injury induced by hydrogen peroxide. TAK-044, even if administered simultaneous with coronary reperfusion, attenuated myocardial ischemia/ reperfusion injury. The energy-preservative effect of TAK-044 could be associated with the good functional recovery in ischemia/reperfused rat hearts.
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Affiliation(s)
- M Iimuro
- Third Department of Internal Medicine, Hamamatsu University School of Medicine, Japan
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31
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Abstract
We examined polymers of sodium 11-acrylamidoundecanoate [poly(Na 11-AAU)] with a very high molecular mass (>10(6)) for their potential use as a pseudo-stationary phase in micellar electrokinetic capillary chromatography (MEKC). Size-exclusion chromatography and capillary electrophoresis studies reveal that the polymers are highly charged, and have a densely packed chain structure. For aromatic compounds, the polymeric surfactant showed significantly different selectivity than sodium dodecyl sulfate (SDS). It was suggested that one molecule of poly(Na 11-AAU) forms one micelle. The structural stability of this pseudo-stationary phase permitted its use with relatively high percentages of organic modifiers in the buffer medium, allowing the separation of highly hydrophobic compounds which are difficult to analyze by conventional MEKC with SDS.
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Affiliation(s)
- C Fujimoto
- Department of Chemistry, Hamamatsu University School of Medicine, Japan.
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Matsumoto Y, Kaneko M, Iimuro M, Fujise Y, Hayashi H. Role of high-energy phosphate metabolism in hydrogen peroxide-induced cardiac dysfunction. Mol Cell Biochem 2000; 204:97-106. [PMID: 10718630 DOI: 10.1023/a:1007042611127] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This study was undertaken to clarify the role of high-energy phosphate metabolism in hydrogen peroxide-induced cardiac dysfunction using phosphorus and fluorine nuclear magnetic resonance spectroscopy. The exposure of a Langendorff-perfused heart to hydrogen peroxide (200-400 micromol/L, 8 min) provoked biphasic contractile dysfunction characterized by a transient depression of left ventricular developed pressure during the administration of hydrogen peroxide and a delayed elevation of left ventricular end-diastolic pressure after the washout of hydrogen peroxide. The initial phase of cardiac dysfunction correlated well with the accumulation of sugar phosphates (r = 0.89, p < 0.01). Furthermore, we demonstrated that glibenclamide, a potent inhibitor of the ATP-sensitive K+ channel, attenuated the initial depression of developed pressure. On the other hand, the delayed elevation of end-diastolic pressure correlated well with the total ATP depletion (r = 0.96, p < 0.01). However, ATP loss was supposed to be a mere result from the increased ATP consumption corresponding to a rise in intracellular free Ca2+ (from the control value of 315+/-23 nmol/L to 708+/-104 after the administration of hydrogen peroxide, p < 0.01), which also paralleled the elevation of end-diastolic pressure. Thus glycolytic inhibition and intracellular Ca2+ overload are independently responsible for the biphasic contractile dysfunction induced by hydrogen peroxide.
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Affiliation(s)
- Y Matsumoto
- Third Department of Internal Medicine, Hamamatsu University School of Medicine, Japan
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33
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Li HQ, Matsuda I, Fujise Y, Ichiyama A. Short-chain acyl-CoA-dependent production of oxalate from oxaloacetate by Burkholderia glumae, a plant pathogen which causes grain rot and seedling rot of rice via the oxalate production. J Biochem 1999; 126:243-53. [PMID: 10393345 DOI: 10.1093/oxfordjournals.jbchem.a022429] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In Burkholderia glumae (formerly named Pseudomonas glumae), isolated as the causal agent of grain rot and seedling rot of rice, oxalate was produced from oxaloacetate in the presence of short-chain acyl-CoA such as acetyl-CoA and propionyl-CoA. Upon purification, the enzyme responsible was separated into two fractions (tentatively named fractions II and III), both of which were required for the acyl-CoA-dependent production of oxalate. In conjugation with the oxalate production from oxaloacetate catalyzed by fractions II and III, acetyl-CoA used as the acyl-CoA substrate was consumed and equivalent amounts of CoASH and acetoacetate were formed. The isotope incorporation pattern indicated that the two carbon atoms of oxalate are both derived from oxaloacetate, and among the four carbon atoms of acetoacetate two are from oxaloacetate and two from acetyl-CoA. When the reaction was carried out with fraction II alone, a decrease in acetyl-CoA and an equivalent level of net utilization of oxaloacetate were observed without appreciable formation of CoASH, acetoacetate or oxalate. It appears that in the oxalate production from oxaloacetate and acetyl-CoA, fraction II catalyzes condensation of the two substrates to form an intermediate which is split into oxalate and acetoacetate by fraction III being accompanied by the release of CoASH.
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Affiliation(s)
- H Q Li
- First Department of Biochemistry Kannondai, Tsukuba, Ibaraki, 305-8604, Japan
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34
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Nishiwaki M, Fujise Y, Yoshida TO, Matsuzawa E, Nishiwaki Y. Evaluation of the effects of photodynamic therapy with phosphorus 31 magnetic resonance spectroscopy. Br J Cancer 1999; 80:133-41. [PMID: 10389989 PMCID: PMC2363014 DOI: 10.1038/sj.bjc.6690332] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Magnetic resonance spectroscopy in situ was used to study changes in phosphorus 31 metabolism after photodynamic therapy (PDT) of transplanted HeLa cell tumours. Tumours were irradiated 2 h after administration of ATX-S10 (8-formyloximethylidene-7-hydroxy-3-ethenyl-2,7,12,18, tetramethyl-porphyrin-13,17-bispropionil aspartate), a new photosensitizer and chlorin derivative. Nuclear magnetic resonance spectra were measured prior to illumination and 1, 3, 7, 14, 21 and 28 days after PDT on each mouse. A drastic decrease in adenosine triphosphate (ATP) and a concomitant increase in inorganic phosphate (Pi) were evident on the first day after PDT in all cases. The beta-ATP/total phosphate (P) ratio was 0.64 +/- 0.29% (average +/- s.d.) in complete response, 0.67 +/- 0.30% in recurrence and 2.45 +/- 0.93% in partial response. Comparison of this ratio to the histological findings revealed that the beta-ATP/total P ratio reflects the HeLa cell tumours which survived PDT. In other words, partial response on the one hand was distinguished from complete response and recurrence on the other with this ratio 1 day after PDT (P < 0.05). In addition, the ratio of phosphomonoester (PME) to Pi rose beyond 1.0 when macroscopic recurrence occurred, while it stayed under 1.0 in complete response. This finding suggests that the recurrence of HeLa cell tumours can be detected by the PME/Pi ratio.
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Affiliation(s)
- M Nishiwaki
- Department of Microbiology and Immunology, Hamamatsu University School of Medicine, Handa-cho Hamamatsu, Japan
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35
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Kanayama N, Maehara K, Suzuki M, Fujise Y, Terao T. The role of chondroitin sulfate chains of urinary trypsin inhibitor in inhibition of LPS-induced increase of cytosolic free Ca2+ in HL60 cells and HUVEC cells. Biochem Biophys Res Commun 1997; 238:560-4. [PMID: 9299551 DOI: 10.1006/bbrc.1997.7344] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Preincubation of HL60 cells and HUVEC cells with urinary trypsin inhibitor (UTI) inhibited increase of cytosolic free Ca2+ induced by LPS. In contrast, an increase of cytosolic free Ca2+ induced by LPS was not inhibited by deglycosylated UTI, UTI treated with monoclonal antibody of chondroitin sulfate. 45Ca2+ binding showed that UTI binds 45Ca2+ dose-dependently. Scatchard plot analysis showed that UTI has two binding sites for Ca2+, a high affinity binding site (Kd=15 microM) and a low affinity site (Kd=150 microM), and that UTI has more than 70 Ca2+ binding sites per molecule. The Ca2+ binding capacity of deglycosylated UTI and UTI treated with monoclonal antibody of chondroitin sulfate was markedly depressed. Furthermore, UTI forms multi-polymers in the presence of Ca2+ as demonstrated by gel filtration and agarose gel electrophoresis. These results suggest that UTI is a physiological Ca2+ chelator on the cells and that the action is due to chondroitin sulfate chains of UTI.
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Affiliation(s)
- N Kanayama
- Department of Obstetrics and Gynecology, Hamamatsu University School of Medicine, Hamamatsu, 3600 Handa-cho, 431-31, Japan
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36
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Nakajima Y, Moriwaki G, Ikeda K, Fujise Y. The effects of sevoflurane on recovery of brain energy metabolism after cerebral ischemia in the rat: a comparison with isoflurane and halothane. Anesth Analg 1997; 85:593-9. [PMID: 9296415 DOI: 10.1097/00000539-199709000-00020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
UNLABELLED Isoflurane is an appropriate anesthetic for neuroanesthesia. We evaluated whether the effect of sevoflurane is similar to that of isoflurane or halothane on brain energy metabolism after cerebral ischemia followed by reperfusion using 31P-magnetic resonance spectroscopy. Wistar rats (n = 21) were divided into three groups: isoflurane-, sevoflurane-, or halothane-treated. After anesthesia induction and surgical preparation, each anesthetic concentration was adjusted to 1 minimum alveolar anesthetic concentration. Cerebral ischemia was induced with bilateral carotid occlusion and reduction of mean arterial blood pressure to 30-40 mm Hg by blood withdrawal. Magnetic resonance measurements were performed during ischemia and for 120 min of reperfusion. Intracellular pH in the isoflurane-treated, sevoflurane-treated, and halothane-treated groups decreased to 6.180 +/- 0.149, 6.125 +/- 0.134, and 6.027 +/- 0.157, respectively, at the end of ischemia. There were no differences in the change of phosphorous compounds and intracellular pH between the isoflurane-treated and the sevoflurane-treated groups during ischemia and reperfusion. However, in the halothane-treated group, we observed a significant delay in the recovery of adenosine triphosphate and intracellular pH (0.038 +/- 0.013 pH unit/min compared with 0.064 +/- 0.011 in the isoflurane-treated group and 0.058 +/- 0.008 in the sevoflurane-treated group) until 24 min of reperfusion (P < 0.05). We conclude that sevoflurane has effects similar to isoflurane on brain energy metabolism during and after cerebral ischemia. IMPLICATIONS It is important to know whether anesthetics adversely effect brain metabolism during ischemia and reperfusion. A new anesthetic, sevoflurane, affected the brain in a manner similar to isoflurane, which has been used for many years as an anesthetic.
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Affiliation(s)
- Y Nakajima
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, Japan
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37
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Aono S, Tanabe S, Fujise Y, Kato H, Tatsukawa R. Persistent organochlorines in minke whale (Balaenoptera acutorostrata) and their prey species from the Antarctic and the North Pacific. Environ Pollut 1997; 98:81-89. [PMID: 15093347 DOI: 10.1016/s0269-7491(97)00105-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/1997] [Accepted: 07/21/1997] [Indexed: 05/24/2023]
Abstract
Persistent organochlorines such as polychlorinated biphenyls (PCBs), DDTs, chlordane compounds (CHLs), hexachlorocyclohexanes (HCHs) and hexachlorobenzene (HCB) were determined in the blubber of minke whale and its diet collected from the Antarctic and the North Pacific Oceans. Residue levels of these compounds (except HCB) in minke whale from the Antarctic were apparently lower than those from the North Pacific. This is due to the lower levels of these pollutants in the southern hemisphere than in the northern hemisphere and the specific feeding habit of the minke whale from the Antarctic which feeds on lower trophic organisms, primarily euphausiids. The north-south difference for HCB residue levels was small, reflecting its dispersible nature through long-range atmospheric transport. Compositions of DDT and CHL compounds in minke whale from the Antarctic were similar to those from the North Pacific. However, the composition of HCH isomers was different between the Antarctic and the North Pacific as was observed in their diet, suggesting a larger or on-going usage of lindane in the southern hemisphere countries. In minke whale from the Antarctic, the elevated level of PCBs residues was noted during a period of 1984 to 1993, implying a continuous discharge of PCBs in the southern hemisphere. A similar discharge was also suggested in the North Pacific, while a decreasing contamination by DDTs was apparent.
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Affiliation(s)
- S Aono
- Department of Environment Conservation, Ehime University, Tarumi 3-5-7, Matsuyama 790, Japan
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Sugimoto K, Fujise Y, Shibata K, Komori Y, Nikai T, Sugihara H, Sakurai N. Effects of a prescription of Chinese herbal medicine on snake venom-induced nephropathy in mice. Biol Pharm Bull 1996; 19:587-92. [PMID: 8860964 DOI: 10.1248/bpb.19.587] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A prescription of Chinese herbal medicine, tentatively named P-19, was examined for its inhibitory effect and its mechanism using an experimental model of nephropathy induced by purified snake venom proteinase, Ac(1)-proteinase (Ac(1)-P). The treated mice were injected with 0.1 ml of crude extract of P-19 intraperitoneally every other day beginning 2 d before to 1 week after the injection of Ac(1)-P. The non-treated mice were injected with saline instead of the medicine P-19. The physiological condition and histopathological observation of the mice at one week after Ac(1)-P injection were better in the treated group than in the non-treated group. This indicates that P-19 inhibited the production of glomerular lesions induced in mice by Ac(1)-P. The physiological condition and histopathological changes in the mice were better with P-19 treatment than with P-3 treatment. Differences in the mechanism of action between the crude extract of P-3 and P-19 are not only in diuretic action but also in the changes in the glomerular basement membrane. On the basis of spectrophotometric studies, phenolic carboxylates were confirmed to be contained in the crude extract of P-19, having a different chemical structure of caffeic acid, which is the effective component in P-3. Immunohistochemical observation revealed a difference between the groups. In the non-treated mice, deposits of the venom were clearly observed in the glomerular tuft and Bowman's capsule, corresponding to the histopathological changes, within 2.5 min after the injection of Ac(1)-P. In the treated mice, the deposits were indistinct in the Bowman's capsule. The difference was considered to be caused by changes in the glomerular basement membrane after P-19 treatment.
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Affiliation(s)
- K Sugimoto
- Department of Hygiene, Hamamatsu University School of Medicine, Japan
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Abstract
One feature of the diabetic cardiomyopathy is the appearance of contractile dysfunction as the workload increases. We hypothesized that this resulted from an impaired creatine kinase/phosphocreatine system and therefore examined the creatine kinase kinetics at both low and high workloads. Creatine kinase flux (by 31P nuclear magnetic resonance saturation transfer method), cardiac performance, and oxygen consumption were measured in control and streptozotocin-induced diabetic rat hearts. Creatine kinase flux was inhibited by iodoacetamide in control hearts to confirm the role of the creatine kinase/phosphocreatine system in cardiac performance. In diabetic hearts, 1) the contractile dysfunction became apparent only at high workloads, 2) the ATP synthesis rate was not significantly different from control hearts, 3) the creatine kinase flux was reduced by 30.8% (257.5 +/- 7.7 mumol.g wet wt-1.min-1 in control vs. 178.3 +/- 9.4 in diabetes, P < 0.001), and 4) the creatine kinase flux did not increase as the workload increased. In control hearts, 5) iodoacetamide inhibited the creatine kinase flux to the same degree as that in diabetic hearts, and 6) the contractile dysfunction was not as severe as that observed in diabetic hearts. These results suggest that the impaired creatine kinase/phosphocreatine system is, at least in part, responsible for the contractile dysfunction in the diabetic cardiomyopathy.
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Affiliation(s)
- Y Matsumoto
- Third Department of Internal Medicine and Chemistry, Hamamatsu University School of Medicine, Japan
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40
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Imaizumi T, Katoh T, Kanno K, Aoyama S, Hayashi E, Takagi Y, Shibata S, Abiru M, Takigami Y, Fujise Y. [Marked dilatation of the bilateral common carotid artery: a case report]. No Shinkei Geka 1995; 23:365-9. [PMID: 7739779] [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: 01/26/2023]
Abstract
We reported a rare case of marked dilatation of the bilateral common carotid artery (CCA) associated with stenosis of the left middle cerebral artery (MCA). A 64-year-old female was admitted with right hemiparesis and dysarthria. She was hospitalized 2 years ago for cholecystitis. For 5 years, she has been under medical treatment for hypertension, diabetes mellitus, hyperlipidemia, cardiac failure associated with hypertrophic cardiomyopathy, and atrial fibrillation. Brain CT scan showed infarction of the left corona radiata. Angiography revealed marked dilatation of the bilateral CCA and the internal carotid artery (ICA), moderate dilatation of the innominate artery and the right subclavian artery, kinking of the right CCA, diverticular outpouching of the left ICA, and stenosis of the right external carotid artery and the left MCA. Breast CT scan revealed moderate dilatation and marked calcification of the ascending aorta and the aortic arch. Laboratory examination did not show any sign of inflammation, rheumatoid factor (RA), antistreptolysis-O (ASLO) and antinucleotic antibody. Based on the clinical course, radiological findings and laboratory data, possible diagnosis of the dilatation of the bilateral CCA was discussed with particular emphasis on arteriosclerotic aneurysm and aortitis syndrome.
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Affiliation(s)
- T Imaizumi
- Department of Neurosurgery, Oji General Hospital
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41
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Abstract
A substance that exhibited a tryptophan-like fluorescence peak at 354 nm on excitation at 295 nm at neutral pH was isolated from human urine. This compound was determined by visible-light absorption spectroscopy, fluorescence spectroscopy, 1H and 13C NMR spectroscopies, and FAB-MS to be 1-(1',2',3',4',5'-pentahydroxypentyl)-1,2,3,4-tetrahydro-2-carboli ne-3- carboxylic acid. This compound, named tetrahydropentoxyline, is a new type of hydrophilic tetrahydro-beta-carboline, and its elution position was between those of 4-pyridoxic acid and kynurenic acid on C18 reversed-phase HPLC. The amount of tetrahydropentoxyline excreted in the urine of normal subjects [n = 21; age, 45 (SD 20) years] was about 5.2 (SD 1.0) mg per day.
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Affiliation(s)
- K Horiuchi
- Department of Chemistry, Hamamatsu University School of Medicine, Shizuoka
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Okayama Y, Kobayashi A, Fujise Y, Yamazaki N. Effects of propranolol and diltiazem on the rate of high-energy phosphate metabolism in reperfused rat hearts--31P-NMR saturation transfer study. Jpn Circ J 1993; 57:521-32. [PMID: 8340999 DOI: 10.1253/jcj.57.521] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The relationships between pressure rate product (PRP) and flux (PCr-->ATP) or flux (Pi-->ATP) were studied in isolated perfused rat hearts by the saturation transfer method using 31P-NMR. The effects of propranolol and diltiazem on phosphate metabolism were also studied. After a 40 min preischemic period, the hearts were subjected to a 15 min period of ischemia, followed by 60 min of reperfusion. Propranolol (0.4-1.2 microM) or diltiazem (3.0-6.0 microM) was infused for 30 min before ischemia and reinfused after reperfusion for 60 min. The flux (PCr-->ATP)/PRP ratio at reperfusion did not differ from that at preischemia. This value was also not affected by propranolol or diltiazem treatment. However, the flux (Pi-->ATP)/PRP ratio at reperfusion was significantly less than that at preischemia. Moreover, this value was significantly improved by propranolol or diltiazem treatment. This study demonstrates that 1) flux (PCr-->ATP) has a good correlation with cardiac performance, 2) stunned myocardium needs less ATP turnover for survival of its depressed contractile activity, and 3) flux (Pi-->ATP) can limit recovery of postischemic performance. Protective effects of propranolol and diltiazem are exerted on the flux (Pi-->ATP), i.e. ATP derived from glycolytic flux, in the reperfused heart.
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Affiliation(s)
- Y Okayama
- Third Department of Internal Medicine, Hamamatsu University School of Medicine, Japan
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43
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Hasunuma R, Ogawa T, Fujise Y, Kawanishi Y. Analysis of selenium metabolites in urine samples of minke whale (Balaenoptera Acutorostrata) using ion exchange chromatography. Comp Biochem Physiol C Comp Pharmacol Toxicol 1993; 104:87-9. [PMID: 8097456 DOI: 10.1016/0742-8413(93)90116-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
1. To study the distribution of selenium metabolites in whale urine, an analytical methodology for separation and determination has been developed. 2. From whale urine, five selenium components, including trimethylselenonium ion were separated and determined by a combination of ion exchange chromatography and fluorometry. 3. The mean urinary selenium level of five minke whales was 1500 ng/ml, with a standard deviation of 400 ng/ml, i.e., about 30 times as high as that for humans.
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Affiliation(s)
- R Hasunuma
- Department of Chemistry, Kitasato University, Sagamihara, Japan
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Abstract
A 45-year-old woman with Bartter's syndrome complicated with gouty arthritis is reported. Bartter's syndrome was diagnosed from hypokalemia, metabolic alkalosis, high plasma renin activity, normal blood pressure and attenuated pressor response to exogenous angiotensin II infusion. Serum uric acid was 11.8 mg/dl, the renal clearance of uric acid was low (3.0 ml/min) and fractional excretion of uric acid (FEUA) was 7.0%, being the lower limit of the normal range. Fractional excretion of phosphate was low (5.3%) and fractional free water clearance per fractional distal sodium delivery was 0.51. The mechanism of hyperuricemia in this case is discussed.
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Affiliation(s)
- T Ogawa
- Department of Internal Medicine, Oji General Hospital, Tomakomai, Japan
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Sugimoto K, Sakurai N, Shirasawa H, Fujise Y, Shibata K, Shimoda K, Sakata J. Bovine cases of urolithiasis treated with traditional herbal medicine, P-3. J Vet Med Sci 1992; 54:579-82. [PMID: 1643179 DOI: 10.1292/jvms.54.579] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- K Sugimoto
- Department of Hygiene, Hamamatsu University School of Medicine, Japan
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Sugimoto K, Sakurai N, Fujise Y, Shirasawa H, Shibata K, Matsuo M, Takahashi T, Komori Y, Nikai T, Sugihara H. Identification of effective component from a traditional herbal medicine and the inhibitory effects on experimental glomerular lesion in mice. J Vet Med Sci 1992; 54:111-8. [PMID: 1558873 DOI: 10.1292/jvms.54.111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Effective constituents for renal disease were partially purified from a herbal prescription. The efficacy on renal diseases was examined using an experimental model system of glomerular lesion in mice induced by Agkistrodon acutus venom (Ac1-P). The extract of boiling water of the herbal prescription (P-3) was first fractionated by ether into an acidic fraction and a mixture of basic and neutral fractions. The acidic fraction was proved to be more effective and then further examined by thin layer chromatography and spectrophotometry. One of the main components was confirmed to be caffeic acid which had inhibitory effect on renal failure in mice by Ac1-P. This effect was considered to be caused by caffeic acid inhibiting the proteolytic enzyme activity of Ac1-P. Caffeic acid should thus have prophylactic or inhibitory effect on glomerular disease in which proteolytic enzymes may have pathogenic roles.
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Affiliation(s)
- K Sugimoto
- Department of Hygiene, Hamamatsu University School of Medicine, Japan
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47
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Abstract
This study was undertaken to determine whether or not prostaglandin I2 (PGI2) analog pretreatment could successfully preserve organ viability after warm hepatic ischemia in rats. Although 120-min ischemia of the liver did not permit survival in rats administered normal saline solution (NS group) before warm ischemia, the survival rate of PGI2 analogue (500 ng/kg/min)-treated rats (PG group) significantly improved to 57% (P less than 0.05). Recirculation following 120-min hepatic ischemia in the NS group resulted in no improvement of B-phosphorus of the ATP (B-ATP)/inorganic phosphate (Pi) ratio measured by 31P nuclear magnetic resonance, a marked increase in the serum aspartate aminotransferase (SAST) level, and an increase in the malondialdehyde (MDA) level in liver tissue. In the PG group, the B-ATP/Pi ratio was significantly improved (P less than 0.05), the elevation in SAST was also markedly suppressed (P less than 0.05), and the MDA level of the liver was lowered more than that in the NS group. Severe congestion and extensive vacuolization of hepatocytes from the peripheral to the midzonal areas were histologically exhibited with single-cell necrosis in the NS group. There were fewer histological alterations of the liver and these coincided with the changes in other parameters in the PG group. Our results indicate that PGI2 analog reduces warm ischemic injury of the liver and provides greater protection for organs to be transplanted.
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Affiliation(s)
- S Suzuki
- Second Department of Surgery, Hamamatsu University School of Medicine, Japan
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48
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Shiraishi Y, Fujise Y, Ikeda K, Takahashi Y, Akagi T, Sasaki S, Nozue Y. The relationship between anesthetic potency (minimum alveolar concentration) and molecular shape; structural studies on conventional inhalational anesthetics. J Anesth 1991; 5:370-9. [PMID: 15278606 DOI: 10.1007/s0054010050370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/1990] [Accepted: 03/25/1991] [Indexed: 10/26/2022]
Abstract
We have explored the ability of molecular mechanics energy calculation as a probe to obtain quantitative information about the molecular shape and energies of inhalational anesthetics. (Molecular mechanics is a readily accessible, nonquantum mechanical method of computing detailed molecular structure from energetical viewpoint.) From this aspect, the structure-activity relationships of ten inhalational anesthetics were studied. Using this method, stable conformers of these anesthetics are deduced with various physicochemical parameters. The importance of dipole interaction as the major determinant of stable conformation was suggested, and reasonable correlations between anesthetic potency (minimum alveolar concentration: MAC) and components of dipole moments, with reference to the specific sites of molecules, were obtained. The results indicate that there are important polar components which play a major role in anesthesia.
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Affiliation(s)
- Y Shiraishi
- Department of Anesthesiology, Hamamatsu University School of Medicine, Hamamatsu, Japan
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Horiuchi K, Adachi K, Fujise Y, Naruse H, Sumimoto K, Kanayama N, Terao T. Isolation and characterization of zinc coproporphyrin I: a major fluorescent component in meconium. Clin Chem 1991; 37:1173-7. [PMID: 1855287] [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: 12/29/2022]
Abstract
We isolated a substance from an organic extract of meconium (in neutral pH) that exhibited a porphyrin-like fluorescence peak at 580 nm on excitation at 405 nm and deduced its structure. Spectrometric data suggest that the substance is not free coproporphyrin I or free coproporphyrin III, but is a chelate of coproporphyrin I with Zn2+. We also detected a chelate of coproporphyrin III with Zn2+ by HPLC. These substances may be useful as new indicators of the presence of meconium.
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Affiliation(s)
- K Horiuchi
- Department of Chemistry, Hamamatsu University School of Medicine, Japan
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Sugimoto K, Sakurai N, Shirasawa H, Kaneko M, Fujise Y, Shibata K, Komori Y, Nikai T, Sugihara H, Fukuda Y. A pathologic study on the inhibitory effects of a herbal medicine against the glomerular lesion induced by Agkistrodon venom in mice. J Vet Med Sci 1991; 53:255-62. [PMID: 1830797 DOI: 10.1292/jvms.53.255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The inhibitory effects of a prescription of herbal medicine, tentatively named P-3, were studied pathologically in an experimental model of the glomerular lesion induced by purified snake Agkistrodon acutus venom proteinase (Ac1-P) in mice. Ac1-P was intravenously inoculated at a single LD50 dose. In the treated group, mice were intraperitoneally injected with an extract of P-3 at a designated time once every two days from 2 days before to 1 week after Ac1-P inoculation. The control group mice were injected with saline instead of P-3. In the control group, the main pathologic changes within 48 hrs after inoculation were pulmonary and gastrointestinal tract hemorrhage and renal petechiae with hematuria. The kidney microscopically showed cystic transformation of the glomerular capillary tufts. followed by occlusive thrombosis. One week after inoculation, the glomerular lesions were mostly replaced by proliferative or proliferative-sclerosing changes with occasional crescent formation. Early signs of tubular atrophy accompanying the glomerular changes were observed. In the P-3 treated mice surviving 48 hrs and 1 week, the changes observed in the controls were markedly inhibited, although P-3 treated mice dying earlier than 30 hrs exhibited hemorrhagic changes similar to controls. This indicated that the herbal medicine had efficacy against the tissue injuries induced by Ac1-P as a proteolytic enzyme.
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Affiliation(s)
- K Sugimoto
- Department of Hygiene, Hamamatsu University School of Medicine, Japan
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