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9. Inhibitory effect of oestradiol on activation of rat hepatic stellate cells in vivo and in vitro

Author

Ichiro Shimizu, Masako Shiba, Liu F, Susumu Ito, Mizobuchi Y, Ma Yr, Takahiro Horie, and Yasuda M

Subjects
Male, medicine.medical_specialty, Cirrhosis, Cell Culture Techniques, Enzyme-Linked Immunosorbent Assay, Biology, Liver Cirrhosis, Experimental, Dimethylnitrosamine, Immunoenzyme Techniques, In vivo, Fibrosis, Internal medicine, medicine, Animals, Rats, Wistar, Estradiol, Cell growth, Gastroenterology, Blotting, Northern, medicine.disease, Rats, Endocrinology, Liver, Cell culture, Hepatic stellate cell, Collagen, Hepatic fibrosis, Type I collagen
Abstract

BackgroundHepatic stellate cells play a key role in the pathogenesis of hepatic fibrosis.AimsTo examine the inhibitory effect of oestradiol on stellate cell activation.MethodsIn vivo, hepatic fibrosis was induced in rats by dimethylnitrosamine or pig serum. In vitro, rat stellate cells were activated by contact with plastic dishes resulting in their transformation into myofibroblast-like cells.ResultsIn the dimethylnitrosamine and pig serum models, treatment with oestradiol at gestation related doses resulted in a dose dependent suppression of hepatic fibrosis with restored content of hepatic retinyl palmitate, reduced collagen content, lower areas of stellate cells which express α smooth muscle actin (α-SMA) and desmin, and lower procollagen type I and III mRNA levels in the liver. In cultured stellate cells, oestradiol inhibited type I collagen production, α-SMA expression, and cell proliferation. These findings suggest that oestradiol is a potent inhibitor of stellate cell transformation.ConclusionThe antifibrogenic role of oestradiol in the liver may contribute to the sex associated differences in the progression from hepatic fibrosis to cirrhosis.

Published
1999

10. Effects of sho-saiko-to, a japanese herbal medicine, on hepatic fibrosis in rats

Author

Susumu Ito, Sakae Amagaya, Yue-Rong Ma, Mizobuchi Y, Tetsuo Miura, Yasuda M, Yoichiro Nakai, Hitoshi Hori, Fei Liu, Takahiro Horie, Ichiro Shimizu, Norifumi Kawada, and Masako Shiba

Subjects
Male, medicine.medical_specialty, Blotting, Western, Mitochondria, Liver, Liver Cirrhosis, Experimental, medicine.disease_cause, Antioxidants, Lipid peroxidation, Retinoids, chemistry.chemical_compound, Oxygen Consumption, Superoxides, Fibrosis, Internal medicine, medicine, Animals, Rats, Wistar, Cells, Cultured, Hypolipidemic Agents, Respiratory Burst, Sho-saiko-to, Hepatology, business.industry, medicine.disease, Malondialdehyde, Immunohistochemistry, Rats, Baicalein, Oxidative Stress, Endocrinology, chemistry, Hepatic stellate cell, Collagen, Lipid Peroxidation, Hepatic fibrosis, business, Cell Division, Oxidative stress, Drugs, Chinese Herbal
Abstract

It has been shown that lipid peroxidation is associated with hepatic fibrosis and stellate cell activation. Sho-saiko-to (TJ-9) is an herbal medicine, which is commonly used to treat chronic hepatitis in Japan, although the mechanism by which TJ-9 protects against hepatic fibrosis is not known. As a result, we assayed the preventive and therapeutic effects of TJ-9 on experimental hepatic fibrosis, induced in rats by dimethylnitrosamine (DMN) or pig serum (PS), and on rat stellate cells and hepatocytes in primary culture, and assessed the antioxidative activities and the active components of TJ-9. Male Wistar rats were given a single intraperitoneal injection of 40 mg/kg DMN or 0.5 mL PS twice weekly for 10 weeks. In each model, rats were fed a basal diet throughout, or the same diet, which also contained 1.5% TJ-9, for 2 weeks before treatment or for the last 2 weeks of treatment. TJ-9 suppressed the induction of hepatic fibrosis, increased hepatic retinoids, and reduced the hepatic levels of collagen and malondialdehyde (MDA), a production of lipid peroxidation. Immunohistochemical examination showed that TJ-9 reduced the deposition of type I collagen and the number of alpha-smooth muscle actin (alpha-SMA) positive-stellate cells in the liver and inhibited, not only lipid peroxidation in cultured rat hepatocytes that were undergoing oxidative stress, but also the production of type I collagen, alpha-SMA expression, cell proliferation, and oxidative burst in cultured rat stellate cells. In addition, TJ-9 inhibited Fe2+/adenosine 5'-diphosphate-induced lipid peroxidation in rat liver mitochondria in a dose-dependent manner and showed radical scavenging activity. Among the active components of TJ-9, baicalin and baicalein were found to be mainly responsible for the antioxidative activity. These findings suggest that Sho-saiko-to (TJ-9) functions as a potent antifibrosuppressant by inhibition of lipid peroxidation in hepatocytes and stellate cells in vivo.

Published
1999

11. Retinyl palmitate reduces hepatic fibrosis in rats induced by dimethylnitrosamine or pig serum

Author

Yasuda M, Susumu Ito, Mizobuchi Y, Ichiro Shimizu, Hitoshi Hori, and Masayuki Shono

Subjects
Male, Retinyl Esters, medicine.medical_specialty, Swine, medicine.drug_class, Liver Cirrhosis, Experimental, Antioxidants, Dimethylnitrosamine, Lipid peroxidation, chemistry.chemical_compound, Fibrosis, Retinyl palmitate, Internal medicine, medicine, Animals, Retinoid, Rats, Wistar, Vitamin A, Dose-Response Relationship, Drug, Hepatology, Chemistry, Retinol, Hepatotoxin, Blood Physiological Phenomena, medicine.disease, Rats, Oxidative Stress, Endocrinology, Hepatic stellate cell, Lipid Peroxidation, Diterpenes, Hepatic fibrosis
Abstract

Background/Aims: Lipid peroxidation has been found to be associated with Ito cell activation. Ito cells are the principal collagen-producing cells and the main storage sites of retinoids. However, the relationship between retinoids and hepatic fibrosis is complex. The aim of this study was to elucidate the role of retinoids as a fibrosuppressant: the effects of retinoids on hepatic fibrosis induced in rats by dimethylnitrosamine or pig serum, as well as on rat Ito cells in primary culture, were examined in order to assess the antioxidant activity of retinoids. Methods: Male Wistar rats were given a single injection of 40 mg/kg dimethylnitrosamine or 0.5 ml PS twice weekly for 10 weeks. In each model, rats were treated with retinyl palmitate for 2 weeks before hepatotoxin treatments or for the last 2 weeks of the treatments. The cumulative amount of retinyl palmitate administered in each experiment was 2, 10, or 20×10 4 IU/rat. Results: Retinyl palmitate treatment before or after administration of dimethylnitrosamine or pig serum suppressed the induction of hepatic fibrosis, restored hepatic retinyl palmitate levels, prevented increases in hepatic levels of collagen and malondialdehyde, a product of lipid peroxidation, and prevented increases in deposition of type III collagen and the number of α-smooth muscle actin (α-SMA) positive-Ito cells in the liver. Retinyl palmitate supplementation resulted in a dose-dependent reduction of α-SMA expression and an oxidative burst in cultured Ito cells. In addition, retinyl palmitate inhibited Fe 2+ /adenosine 5′-diphosphate-induced lipid peroxidation in rat liver mitochondria and showed radical scavenging activity. Conclusions: These findings suggest that retinyl palmitate may suppress the induction of hepatic fibrosis, at least in part, by the inhibition of Ito cell activation through its antioxidant activity.

Published
1998

12. Suppressive effect of oestradiol on chemical hepatocarcinogenesis in rats

Author

Takahiro Horie, Susumu Ito, Masako Shiba, Liu F, Ma Yr, Ichiro Shimizu, Yasuda M, and Mizobuchi Y

Subjects
Male, medicine.medical_specialty, medicine.drug_class, Ovariectomy, Endogeny, Receptors, Estradiol, Biology, Malignant transformation, chemistry.chemical_compound, Liver Neoplasms, Experimental, Internal medicine, polycyclic compounds, Biomarkers, Tumor, medicine, Animals, Hepatectomy, Diethylnitrosamine, Testosterone, Orchiectomy, skin and connective tissue diseases, Receptor, Carcinogen, Glutathione Transferase, Hepatology, Estradiol, business.industry, Liver Disease, Body Weight, Gastroenterology, Radioimmunoassay, Organ Size, 2-Acetylaminofluorene, Androgen, Immunohistochemistry, Rats, Inbred F344, Rats, Androgen receptor, Endocrinology, Castration, chemistry, Receptors, Androgen, Estrogen, Female, business
Abstract

Aims—To examine the effects of oestradiol and testosterone on the early carcinogenic changes expressed in rat liver from the diethylnitrosamine (DEN), 2-acetylaminofluorene (AAF), partial hepatectomy (PH) model of hepatocarcinogenesis.Methods—Preneoplastic liver lesions were evaluated using immunohistochemical analysis of glutathione-S-transferase placental form (GST-P) expression; oestrogen and androgen receptor levels were measured by radioimmunoassay.Results—Oestradiol administration to non-castrated DEN-AAF-PH treated males resulted in a decrease in the area of GST-P positive foci, while testosterone increased the serum oestradiol level and reduced the area. In males, castration alone and castration with oestradiol replacement significantly reduced the GST-P positive area, and increased the hepatic oestrogen receptor level. In DEN-AAF-PH treated females, castration with testosterone replacement was associated with a significant increase in the GST-P positive area and the hepatic androgen receptor level.Conclusion—These findings suggest that exogenous and endogenous oestradiol can suppress chemical hepatocarcinogenesis. It appears that oestrogen receptors may be involved in the inhibition of malignant transformation of preneoplastic liver cells, while androgens and androgen receptors are involved in hepatocarcinogenesis.

Published
1998

14. CELL BIOLOGY AND SIGNALING

Author

Agarwal, M., primary, Nitta, R., additional, Dovat, S., additional, Li, G., additional, Arita, H., additional, Narita, Y., additional, Fukushima, S., additional, Tateishi, K., additional, Matsushita, Y., additional, Yoshida, A., additional, Miyakita, Y., additional, Ohno, M., additional, Collins, V. P., additional, Kawahara, N., additional, Shibui, S., additional, Ichimura, K., additional, Kahn, S. A., additional, Gholamin, S., additional, Junier, M.-P., additional, Chneiweiss, H., additional, Weissman, I., additional, Mitra, S., additional, Cheshier, S., additional, Avril, T., additional, Hamlat, A., additional, Le Reste, P.-J., additional, Mosser, J., additional, Quillien, V., additional, Carrato, C., additional, Munoz-Marmol, A., additional, Serrano, L., additional, Pijuan, L., additional, Hostalot, C., additional, Villa, S. l., additional, Ariza, A., additional, Etxaniz, O., additional, Balana, C., additional, Benveniste, E. T., additional, Zheng, Y., additional, McFarland, B., additional, Drygin, D., additional, Bellis, S., additional, Bredel, M., additional, Lotsch, D., additional, Engelmaier, C., additional, Allerstorfer, S., additional, Grusch, M., additional, Pichler, J., additional, Weis, S., additional, Hainfellner, J., additional, Marosi, C., additional, Spiegl-Kreinecker, S., additional, Berger, W., additional, Bronisz, A., additional, Nowicki, M. O., additional, Wang, Y., additional, Ansari, K., additional, Chiocca, E. A., additional, Godlewski, J., additional, Brown, K., additional, Kwatra, M., additional, Bui, T., additional, Zhu, S., additional, Kozono, D., additional, Li, J., additional, Kushwaha, D., additional, Carter, B., additional, Chen, C., additional, Schulte, J., additional, Srikanth, M., additional, Das, S., additional, Zhang, J., additional, Lathia, J., additional, Yin, L., additional, Rich, J., additional, Olson, E., additional, Kessler, J., additional, Chenn, A., additional, Cherry, A., additional, Haas, B., additional, Lin, Y. H., additional, Ong, S.-E., additional, Stella, N., additional, Cifarelli, C. P., additional, Griffin, R. J., additional, Cong, D., additional, Zhu, W., additional, Shi, Y., additional, Clark, P., additional, Kuo, J., additional, Hu, S., additional, Sun, D., additional, Bookland, M., additional, Darbinian, N., additional, Dey, A., additional, Robitaille, M., additional, Remke, M., additional, Faury, D., additional, Maier, C., additional, Malhotra, A., additional, Jabado, N., additional, Taylor, M., additional, Angers, S., additional, Kenney, A., additional, Ren, X., additional, Zhou, H., additional, Schur, M., additional, Baweja, A., additional, Singh, M., additional, Erdreich-Epstein, A., additional, Fu, J., additional, Koul, D., additional, Yao, J., additional, Saito, N., additional, Zheng, S., additional, Verhaak, R., additional, Lu, Z., additional, Yung, W. K. A., additional, Gomez, G., additional, Volinia, S., additional, Croce, C., additional, Brennan, C., additional, Cavenee, W., additional, Furnari, F., additional, Lopez, S. G., additional, Qu, D., additional, Petritsch, C., additional, Gonzalez-Huarriz, M., additional, Aldave, G., additional, Ravi, D., additional, Rubio, A., additional, Diez-Valle, R., additional, Marigil, M., additional, Jauregi, P., additional, Vera, B., additional, Rocha, A. A. d. l., additional, Tejada-Solis, S., additional, Alonso, M. M., additional, Gopal, U., additional, Isaacs, J., additional, Gruber-Olipitz, M., additional, Dabral, S., additional, Ramkissoon, S., additional, Kung, A., additional, Pak, E., additional, Chung, J., additional, Theisen, M., additional, Sun, Y., additional, Monrose, V., additional, Franchetti, Y., additional, Shulman, D., additional, Redjal, N., additional, Tabak, B., additional, Beroukhim, R., additional, Zhao, J., additional, Buonamici, S., additional, Ligon, K., additional, Kelleher, J., additional, Segal, R., additional, Canton, D., additional, Diaz, P., additional, Scott, J., additional, Hara, K., additional, Kageji, T., additional, Mizobuchi, Y., additional, Kitazato, K., additional, Okazaki, T., additional, Fujihara, T., additional, Nakajima, K., additional, Mure, H., additional, Kuwayama, K., additional, Hara, T., additional, Nagahiro, S., additional, Hill, L., additional, Botfield, H., additional, Hossain-Ibrahim, K., additional, Logan, A., additional, Cruickshank, G., additional, Liu, Y., additional, Gilbert, M., additional, Kyprianou, N., additional, Rangnekar, V., additional, Horbinski, C., additional, Hu, Y., additional, Vo, C., additional, Li, Z., additional, Ke, C., additional, Ru, N., additional, Hess, K. R., additional, Linskey, M. E., additional, Zhou, Y.-a. H., additional, Hu, F., additional, Vinnakota, K., additional, Wolf, S., additional, Kettenmann, H., additional, Jackson, P. J., additional, Larson, J. D., additional, Beckmann, D. A., additional, Moriarity, B. S., additional, Largaespada, D. A., additional, Jalali, S., additional, Agnihotri, S., additional, Singh, S., additional, Burrell, K., additional, Croul, S., additional, Zadeh, G., additional, Kang, S.-H., additional, Yu, M. O., additional, Song, N.-H., additional, Park, K.-J., additional, Chi, S.-G., additional, Chung, Y.-G., additional, Kim, S. K., additional, Kim, J. W., additional, Kim, J. Y., additional, Kim, J. E., additional, Choi, S. H., additional, Kim, T. M., additional, Lee, S.-H., additional, Kim, S.-K., additional, Park, S.-H., additional, Kim, I. H., additional, Park, C.-K., additional, Jung, H.-W., additional, Koldobskiy, M., additional, Ahmed, I., additional, Ho, G., additional, Snowman, A., additional, Raabe, E., additional, Eberhart, C., additional, Snyder, S., additional, Gugel, I., additional, Bornemann, A., additional, Pantazis, G., additional, Mack, S., additional, Shih, D., additional, Sabha, N., additional, Tatagiba, M., additional, Krischek, B., additional, Schulte, A., additional, Liffers, K., additional, Kathagen, A., additional, Riethdorf, S., additional, Westphal, M., additional, Lamszus, K., additional, Lee, J. S., additional, Xiao, J., additional, Patel, P., additional, Schade, J., additional, Wang, J., additional, Deneen, B., additional, Song, H.-R., additional, Leiss, L., additional, Gjerde, C., additional, Saed, H., additional, Rahman, A., additional, Lellahi, M., additional, Enger, P. O., additional, Leung, R., additional, Gil, O., additional, Lei, L., additional, Canoll, P., additional, Sun, S., additional, Lee, D., additional, Ho, A. S. W., additional, Pu, J. K. S., additional, Zhang, X.-q., additional, Lee, N. P., additional, Dat, P. J. R., additional, Leung, G. K. K., additional, Loetsch, D., additional, Steiner, E., additional, Holzmann, K., additional, Pirker, C., additional, Hlavaty, J., additional, Petznek, H., additional, Hegedus, B., additional, Garay, T., additional, Mohr, T., additional, Sommergruber, W., additional, Lukiw, W. J., additional, Jones, B. M., additional, Zhao, Y., additional, Bhattacharjee, S., additional, Culicchia, F., additional, Magnus, N., additional, Garnier, D., additional, Meehan, B., additional, McGraw, S., additional, Hashemi, M., additional, Lee, T. H., additional, Milsom, C., additional, Gerges, N., additional, Trasler, J., additional, Pawlinski, R., additional, Mackman, N., additional, Rak, J., additional, Maherally, Z., additional, Thorne, A., additional, An, Q., additional, Barbu, E., additional, Fillmore, H., additional, Pilkington, G., additional, Tan, S. L., additional, Tan, S., additional, Choi, S., additional, Potts, C., additional, Ford, D. A., additional, Nahle, Z., additional, Kenney, A. M., additional, Matlaf, L., additional, Khan, S., additional, Zider, A., additional, Singer, E., additional, Cobbs, C., additional, Soroceanu, L., additional, McFarland, B. C., additional, Hong, S. W., additional, Rajbhandari, R., additional, Twitty, G. B., additional, Gray, G. K., additional, Yu, H., additional, Benveniste, E. N., additional, Nozell, S. E., additional, Minata, M., additional, Kim, S., additional, Mao, P., additional, Kaushal, J., additional, Nakano, I., additional, Mizowaki, T., additional, Sasayama, T., additional, Tanaka, K., additional, Mizukawa, K., additional, Nishihara, M., additional, Nakamizo, S., additional, Tanaka, H., additional, Kohta, M., additional, Hosoda, K., additional, Kohmura, E., additional, Moeckel, S., additional, Meyer, K., additional, Leukel, P., additional, Bogdahn, U., additional, Riehmenschneider, M. J., additional, Bosserhoff, A. K., additional, Spang, R., additional, Hau, P., additional, Mukasa, A., additional, Watanabe, A., additional, Ogiwara, H., additional, Aburatani, H., additional, Mukherjee, J., additional, Obha, S., additional, See, W., additional, Pieper, R., additional, Otsuka, R., additional, Kung, D., additional, Sinha, T., additional, Meares, G., additional, Nozell, S., additional, Ott, M., additional, Litzenburger, U., additional, Rauschenbach, K., additional, Bunse, L., additional, Pusch, S., additional, Ochs, K., additional, Sahm, F., additional, Opitz, C., additional, von Deimling, A., additional, Wick, W., additional, Platten, M., additional, Peruzzi, P., additional, Read, R., additional, Fenton, T., additional, Wykosky, J., additional, Vandenberg, S., additional, Babic, I., additional, Iwanami, A., additional, Yang, H., additional, Mischel, P., additional, Thomas, J., additional, Ronellenfitsch, M. W., additional, Thiepold, A. L., additional, Harter, P. N., additional, Mittelbronn, M., additional, Steinbach, J. P., additional, Rybakova, Y., additional, Kalen, A., additional, Sarsour, E., additional, Goswami, P., additional, Silber, J., additional, Harinath, G., additional, Aldaz, B., additional, Fabius, A. W. M., additional, Turcan, S., additional, Chan, T. A., additional, Huse, J. T., additional, Sonabend, A. M., additional, Bansal, M., additional, Guarnieri, P., additional, Soderquist, C., additional, Yun, J., additional, Kennedy, B., additional, Sisti, J., additional, Bruce, S., additional, Bruce, R., additional, Shakya, R., additional, Ludwig, T., additional, Rosenfeld, S., additional, Sims, P. A., additional, Bruce, J. N., additional, Califano, A., additional, Stockhausen, M.-T., additional, Kristoffersen, K., additional, Olsen, L. S., additional, Poulsen, H. S., additional, Stringer, B., additional, Day, B., additional, Barry, G., additional, Piper, M., additional, Jamieson, P., additional, Ensbey, K., additional, Bruce, Z., additional, Richards, L., additional, Boyd, A., additional, Sufit, A., additional, Burleson, T., additional, Le, J. P., additional, Keating, A. K., additional, Sundstrom, T., additional, Varughese, J. K., additional, Harter, P., additional, Prestegarden, L., additional, Petersen, K., additional, Azuaje, F., additional, Tepper, C., additional, Ingham, E., additional, Even, L., additional, Johnson, S., additional, Skaftnesmo, K. O., additional, Lund-Johansen, M., additional, Bjerkvig, R., additional, Ferrara, K., additional, Thorsen, F., additional, Takeshima, H., additional, Yamashita, S., additional, Yokogami, K., additional, Mizuguchi, S., additional, Nakamura, H., additional, Kuratsu, J., additional, Fukushima, T., additional, Morishita, K., additional, Tang, Y., additional, Vaka, D., additional, Chen, S., additional, Ponnuswami, A., additional, Cho, Y.-J., additional, Monje, M., additional, Nakamura, T., additional, Cahill, D., additional, Tiemann, K., additional, Hedman, H., additional, Niclou, S. P., additional, Timmer, M., additional, Tjiong, R., additional, Rohn, G., additional, Goldbrunner, R., additional, Stavrinou, P., additional, Perrech, M., additional, Tokita, M., additional, Mikheev, S., additional, Sellers, D., additional, Mikheev, A., additional, Kosai, Y., additional, Rostomily, R., additional, Tritschler, I., additional, Seystahl, K., additional, Schroeder, J. J., additional, Weller, M., additional, Wade, A., additional, Robinson, A. E., additional, Phillips, J. J., additional, Gong, Y., additional, Ma, Y., additional, Cheng, Z., additional, Thompson, R., additional, Fan, Q.-W., additional, Cheng, C., additional, Gustafson, W., additional, Charron, E., additional, Zipper, P., additional, Wong, R., additional, Chen, J., additional, Lau, J., additional, Knobbe-Thosen, C., additional, Jura, N., additional, Reifenberger, G., additional, Shokat, K., additional, Weiss, W., additional, Wu, S., additional, Hu, J., additional, Taylor, T., additional, Villa, G. R., additional, Mischel, P. S., additional, Gonias, S. L., additional, Yamashita, D., additional, Kondo, T., additional, Takahashi, H., additional, Inoue, A., additional, Kohno, S., additional, Harada, H., additional, Ohue, S., additional, Ohnishi, T., additional, Li, P., additional, Ng, J., additional, Yuelling, L., additional, Du, F., additional, Curran, T., additional, Yang, Z.-j., additional, Zhu, D., additional, Castellino, R. C., additional, Van Meir, E. G., additional, Begum, G., additional, Wang, Q., additional, Yang, S.-S., additional, Lin, S.-H., additional, and Kahle, K., additional

Published
2013
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15. EXPERIMENTAL THERAPEUTICS AND PHARMACOLOGY

Author

Aaberg-Jessen, C., primary, Fogh, L., additional, Halle, B., additional, Jensen, V., additional, Brunner, N., additional, Kristensen, B. W., additional, Abe, T., additional, Momii, Y., additional, Watanabe, J., additional, Morisaki, I., additional, Natsume, A., additional, Wakabayashi, T., additional, Fujiki, M., additional, Aldaz, B., additional, Fabius, A. W. M., additional, Silber, J., additional, Harinath, G., additional, Chan, T. A., additional, Huse, J. T., additional, Anai, S., additional, Hide, T., additional, Nakamura, H., additional, Makino, K., additional, Yano, S., additional, Kuratsu, J.-i., additional, Balyasnikova, I. V., additional, Prasol, M. S., additional, Kanoija, D. K., additional, Aboody, K. S., additional, Lesniak, M. S., additional, Barone, T., additional, Burkhart, C., additional, Purmal, A., additional, Gudkov, A., additional, Gurova, K., additional, Plunkett, R., additional, Barton, K., additional, Misuraca, K., additional, Cordero, F., additional, Dobrikova, E., additional, Min, H., additional, Gromeier, M., additional, Kirsch, D., additional, Becher, O., additional, Pont, L. B., additional, Kloezeman, J., additional, van den Bent, M., additional, Kanaar, R., additional, Kremer, A., additional, Swagemakers, S., additional, French, P., additional, Dirven, C., additional, Lamfers, M., additional, Leenstra, S., additional, Balvers, R., additional, Kleijn, A., additional, Lawler, S., additional, Gong, X., additional, Andres, A., additional, Hanson, J., additional, Delashaw, J., additional, Bota, D., additional, Chen, C.-C., additional, Yao, N.-W., additional, Chuang, W.-J., additional, Chang, C., additional, Chen, P.-Y., additional, Huang, C.-Y., additional, Wei, K.-C., additional, Cheng, Y., additional, Dai, Q., additional, Morshed, R., additional, Han, Y., additional, Auffinger, B., additional, Wainwright, D., additional, Zhang, L., additional, Tobias, A., additional, Rincon, E., additional, Thaci, B., additional, Ahmed, A., additional, He, C., additional, Lesniak, M., additional, Choi, Y. A., additional, Pandya, H., additional, Gibo, D. M., additional, Fokt, I., additional, Priebe, W., additional, Debinski, W., additional, Chornenkyy, Y., additional, Agnihotri, S., additional, Buczkowicz, P., additional, Rakopoulos, P., additional, Morrison, A., additional, Barszczyk, M., additional, Hawkins, C., additional, Chung, S., additional, Decollogne, S., additional, Luk, P., additional, Shen, H., additional, Ha, W., additional, Day, B., additional, Stringer, B., additional, Hogg, P., additional, Dilda, P., additional, McDonald, K., additional, Moore, S., additional, Hayden-Gephart, M., additional, Bergen, J., additional, Su, Y., additional, Rayburn, H., additional, Edwards, M., additional, Scott, M., additional, Cochran, J., additional, Das, A., additional, Varma, A. K., additional, Wallace, G. C., additional, Dixon-Mah, Y. N., additional, Vandergrift, W. A., additional, Giglio, P., additional, Ray, S. K., additional, Patel, S. J., additional, Banik, N. L., additional, Dasgupta, T., additional, Olow, A., additional, Yang, X., additional, Mueller, S., additional, Prados, M., additional, James, C. D., additional, Haas-Kogan, D., additional, Dave, N. D., additional, Desai, P. B., additional, Gudelsky, G. A., additional, Chow, L. M. L., additional, LaSance, K., additional, Qi, X., additional, Driscoll, J., additional, Ebsworth, K., additional, Walters, M. J., additional, Ertl, L. S., additional, Wang, Y., additional, Berahovic, R. D., additional, McMahon, J., additional, Powers, J. P., additional, Jaen, J. C., additional, Schall, T. J., additional, Eroglu, Z., additional, Portnow, J., additional, Sacramento, A., additional, Garcia, E., additional, Raubitschek, A., additional, Synold, T., additional, Esaki, S., additional, Rabkin, S., additional, Martuza, R., additional, Wakimoto, H., additional, Ferluga, S., additional, Tome, C. L., additional, Forde, H. E., additional, Netland, I. A., additional, Sleire, L., additional, Skeie, B., additional, Enger, P. O., additional, Goplen, D., additional, Giladi, M., additional, Tichon, A., additional, Schneiderman, R., additional, Porat, Y., additional, Munster, M., additional, Dishon, M., additional, Weinberg, U., additional, Kirson, E., additional, Wasserman, Y., additional, Palti, Y., additional, Gramatzki, D., additional, Staudinger, M., additional, Frei, K., additional, Peipp, M., additional, Weller, M., additional, Grasso, C., additional, Liu, L., additional, Berlow, N., additional, Davis, L., additional, Fouladi, M., additional, Gajjar, A., additional, Huang, E., additional, Hulleman, E., additional, Hutt, M., additional, Keller, C., additional, Li, X.-N., additional, Meltzer, P., additional, Quezado, M., additional, Quist, M., additional, Raabe, E., additional, Spellman, P., additional, Truffaux, N., additional, van Vurden, D., additional, Wang, N., additional, Warren, K., additional, Pal, R., additional, Grill, J., additional, Monje, M., additional, Green, A. 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M., additional, Lee, S., additional, Ramisetti, S., additional, Slagle-Webb, B., additional, Sharma, A., additional, Connor, J., additional, Lee, W.-S., additional, Kluk, M., additional, Aster, J. C., additional, Ligon, K., additional, Sun, S., additional, Lee, D., additional, Ho, A. S. W., additional, Pu, J. K. S., additional, Zhang, Z.-q., additional, Lee, N. P., additional, Day, P. J. R., additional, Leung, G. K. K., additional, Liu, Z., additional, Liu, X., additional, Madhankumar, A. B., additional, Miller, P., additional, Webb, B., additional, Connor, J. R., additional, Yang, Q. X., additional, Lobo, M., additional, Green, S., additional, Schabel, M., additional, Gillespie, Y., additional, Woltjer, R., additional, Pike, M., additional, Lu, Y.-J., additional, Luchman, H. A., additional, Stechishin, O., additional, Nguyen, S., additional, Cairncross, J. G., additional, Weiss, S., additional, Lun, X., additional, Wells, J. C., additional, Hao, X., additional, Grinshtein, N., additional, Kaplan, D., additional, Luchman, A., additional, Senger, D., additional, Robbins, S., additional, Madhankumar, A., additional, Rizk, E., additional, Payne, R., additional, Park, A., additional, Pang, M., additional, Harbaugh, K., additional, Wilisch-Neumann, A., additional, Pachow, D., additional, Kirches, E., additional, Mawrin, C., additional, McDonell, S., additional, Liang, J., additional, Piao, Y., additional, Nguyen, N., additional, Yung, A., additional, Verhaak, R., additional, Sulman, E., additional, Stephan, C., additional, Lang, F., additional, de Groot, J., additional, Mizobuchi, Y., additional, Okazaki, T., additional, Kageji, T., additional, Kuwayama, K., additional, Kitazato, K. T., additional, Mure, H., additional, Hara, K., additional, Morigaki, R., additional, Matsuzaki, K., additional, Nakajima, K., additional, Nagahiro, S., additional, Kumala, S., additional, Heravi, M., additional, Devic, S., additional, Muanza, T., additional, Knubel, K. H., additional, Neuwelt, A., additional, Wu, Y. J., additional, Donson, A., additional, Vibhakar, R., additional, Venkatamaran, S., additional, Amani, V., additional, Neuwelt, E., additional, Rapkin, L., additional, Foreman, N., additional, Ibrahim, F., additional, New, P., additional, Cui, K., additional, Zhao, H., additional, Chow, D., additional, Stephen, W., additional, Nozue-Okada, K., additional, Nagane, M., additional, McDonald, K. L., additional, Ogawa, D., additional, Chiocca, E., additional, Godlewski, J., additional, Patel, A., additional, Pasupuleti, N., additional, Gorin, F., additional, Valenzuela, A., additional, Leon, L., additional, Carraway, K., additional, Ramachandran, C., additional, Nair, S., additional, Quirrin, K.-W., additional, Khatib, Z., additional, Escalon, E., additional, Melnick, S., additional, Phillips, A., additional, Boghaert, E., additional, Vaidya, K., additional, Ansell, P., additional, Shalinsky, D., additional, Zhang, Y., additional, Voorbach, M., additional, Mudd, S., additional, Holen, K., additional, Humerickhouse, R., additional, Reilly, E., additional, Parab, S., additional, Diago, O., additional, Ryken, T., additional, Agarwal, S., additional, Al-Keilani, M., additional, Alqudah, M., additional, Sibenaller, Z., additional, Assemolt, M., additional, Sai, K., additional, Li, W.-y., additional, Li, W.-p., additional, Chen, Z.-p., additional, Saito, R., additional, Sonoda, Y., additional, Kanamori, M., additional, Yamashita, Y., additional, Kumabe, T., additional, Tominaga, T., additional, Sarkar, G., additional, Curran, G., additional, Jenkins, R., additional, Scharnweber, R., additional, Kato, Y., additional, Lin, J., additional, Everson, R., additional, Soto, H., additional, Kruse, C., additional, Liau, L., additional, Prins, R., additional, Semenkow, S., additional, Chu, Q., additional, Eberhart, C., additional, Sengupta, R., additional, Marassa, J., additional, Piwnica-Worms, D., additional, Rubin, J., additional, Shai, R., additional, Pismenyuk, T., additional, Moshe, I., additional, Fisher, T., additional, Freedman, S., additional, Simon, A., additional, Amariglio, N., additional, Rechavi, G., additional, Toren, A., additional, Yalon, M., additional, Shimazu, Y., additional, Kurozumi, K., additional, Ichikawa, T., additional, Fujii, K., additional, Onishi, M., additional, Ishida, J., additional, Oka, T., additional, Watanabe, M., additional, Nasu, Y., additional, Kumon, H., additional, Date, I., additional, Sirianni, R. W., additional, McCall, R. L., additional, Spoor, J., additional, van der Kaaij, M., additional, Geurtjens, M., additional, Veiseh, O., additional, Fang, C., additional, Leung, M., additional, Strohbehn, G., additional, Atsina, K.-K., additional, Patel, T., additional, Piepmeier, J., additional, Zhou, J., additional, Saltzman, W. M., additional, Takahashi, M., additional, Valdes, G., additional, Inagaki, A., additional, Kamijima, S., additional, Hiraoka, K., additional, Micewicz, E., additional, McBride, W. H., additional, Iwamoto, K. S., additional, Gruber, H. E., additional, Robbins, J. M., additional, Jolly, D. J., additional, McCully, C., additional, Bacher, J., additional, Thomas, T., additional, Murphy, R., additional, Steffen-Smith, E., additional, McAllister, R., additional, Pastakia, D., additional, Widemann, B., additional, Chen, P., additional, Hua, M., additional, Liu, H., additional, Woolf, E. C., additional, Abdelwahab, M. G., additional, Fenton, K. E., additional, Liu, Q., additional, Turner, G., additional, Preul, M. C., additional, Scheck, A. C., additional, Shen, W., additional, Brown, D., additional, Pedersen, H., additional, Hariono, S., additional, Yao, T.-W., additional, Sidhu, A., additional, Weiss, W. A., additional, Nicolaides, T. P., additional, and Olusanya, T., additional

Published
2013
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30. Particle damping for vibration suppression of a clamped plate

Author

Masato Saeki, Kazama, Y., and Mizobuchi, Y.

Subjects
Physics::Fluid Dynamics, Finite element method, Computational methods in mechanics, Granular materials, DEM, Vibration suppression, Contact problems, Particle methods (Numerical analysis), Elements finits, Mètode dels, Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits [Àrees temàtiques de la UPC]
Abstract

In this paper, analytical and experimental studies of the vibration suppression of a square plate with a particle damper are discussed. The primary objective of this paper is to construct an analytical model to simulate the transient impact response of a plate with a particle damper. In the experimental approach, an acrylic resin plate with all sides clamped was used. The transient vibration of the plate caused by the impact of a steel ball was measured with a laser displacement sensor. The effects of the mass ratio, particle material and cavity shape on the damping efficiency were investigated. To capture the behavior of the entire system in detail, an analytical model based on coupling between the finite element method and the discrete element method was constructed. Rayleigh damping was used to approximate the damping behavior of the plate without granular materials. Comparison between the experimental and analytical results showed that accurate estimates of the response of a plate can be obtained.

44. Value of the Acute Physiology and Chronic Health Evaluation II (APACHE II) score in predicting hospital mortality for postoperative brain tumor patients in intensive care units in Japan: A retrospective case-control study.

Author

Azumi M, Mizobuchi Y, Nakanishi N, Nakajima K, Hara K, Fujihara T, Ishihara M, Oto J, and Takagi Y

Subjects
Humans, Male, Female, Middle Aged, Japan epidemiology, Aged, Retrospective Studies, Case-Control Studies, Adult, Prognosis, Aged, 80 and over, Predictive Value of Tests, Hospital Mortality, APACHE, Brain Neoplasms surgery, Brain Neoplasms mortality, Intensive Care Units
Abstract

Objective: Acute Physiology and Chronic Health Evaluation II (APACHE II) is based on the data of intensive care unit (ICU) patients and often correlates with disease severity and prognosis. However, no prognostic predictors exist based on ICU admission data for patients with brain tumors, and no studies have reported an association between APACHE II and prognosis in patients with brain tumors. The Japanese Intensive Care Patients Database (JIPAD) was established to improve the quality of care delivered in intensive care medicine in Japan. We used JIPAD to examine factors associated with in-hospital mortality based on available data of postoperative patients with brain tumors admitted to the ICU., Methods: Patients aged ≥16 years enrolled in JIPAD between April 2015 and March 2018 after surgical brain tumor resection or biopsy of brain tumors. We examined factors related to outcomes at discharge based on blood tests and medical procedures performed during ICU admission, tumor type, and APACHE II score., Results: Among the 1454 patients (male:female ratio: 1:1.1, mean age: 62 years) in the study, 32 (2.2 %) died during hospital stay. In multivariate analysis, male sex (odds ratio [OR] 2.70, [95 % confidence interval, CI 1.22-6.00]), malignant tumor (OR 2.51 [95 % CI 1.13-5.55]), and APACHE II score ≥15 (OR 2.51 [95 % CI 3.08-14.3]) were significantly associated with in-hospital mortality., Conclusion: By picking up cases with a high risk of in-hospital death at an early stage, it is possible to improve methods of treatment and support for the patient's family., Competing Interests: Declaration of Competing Interest None., (Copyright © 2024 Elsevier B.V. All rights reserved.)

Published
2024
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45. Ultrasonic humidifier lung with a reversed halo sign: A case report.

Author

Hasegawa T, Ryu K, Fukuda T, Mizobuchi Y, Yoshimatsu L, Sato R, Takatsuka M, Shinfuku K, Yamada M, Yamanaka Y, Hosaka Y, Seki A, Takasaka N, Ishikawa T, and Araya J

Abstract

The reversed halo sign was initially reported as a representative computed tomography scan finding of cryptogenic organizing pneumonia. Since then, however, it has been reported in various diseases and is now considered a nonspecific finding. However, there are no cases of humidifier lung with the reversed halo sign. An 82-year-old Japanese male patient presented with moving difficulties 48 days after starting darolutamide treatment for prostate cancer. He was admitted to the hospital due to acute pneumonia, which presented as bilateral extensive nonsegmental ground-glass opacities in the peripheral regions and extensive areas of ground-glass opacity with a circumferential halo of consolidation, with the reversed halo sign on computed tomography scan. After darolutamide discontinuation with the concomitant administration of antibiotics, the patient's pneumonia improved, and he was discharged from the hospital. However, within a few days, he was again admitted to the hospital due to pneumonia. He was found to have been using an ultrasonic humidifier at home and was then diagnosed with humidifier lung based on the bronchoscopy and provocative testing findings. Hence, ultrasonic humidifier lung should be considered as a differential diagnosis in patients presenting with the reversed halo sign, and a detailed medical history must be taken., (© 2024 The Authors. Published by Elsevier Inc. on behalf of University of Washington.)

Published
2024
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46. [Prevalences of Trigeminal Neuralgia and Hemifacial Spasm].

Author

Mizobuchi Y and Nagahiro S

Subjects
Female, Humans, Prevalence, Pain, Neurosurgeons, Hemifacial Spasm surgery, Trigeminal Neuralgia surgery
Abstract

Neurosurgeons must have knowledge about the epidemiology of trigeminal neuralgia and facial spasm. The annual incidence of trigeminal neuralgia is 4.3-28.9 per 100,000 persons, with a prevalence of 76.8 per 100,000 persons, increasing with age. It is more common in women and on the right side, with SCA being the most common causative vessel. The long-term efficacy of MVD for trigeminal neuralgia is 80% with complete resolution of pain and 5.2% with complications, which is safe and highly effective when performed by an expert surgeon. Hemifacial spasm has an annual incidence of 0.78/100,000 with a prevalence of approximately 10 per 100,000, increasing with age. It is more common in women and on the left side. AICA alone is the most common causative vessel. The long-term efficacy of MVD for facial spasms is 87.1% with complete resolution of facial spasms and 3.0% with complications. As with trigeminal neuralgia, safe and highly effective treatment can be expected when treated by an expert surgeon.

Published
2024
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47. Differences in amyloid-β and tau/p-tau deposition in blood-injected mouse brains using micro-syringe to mimic traumatic brain microhemorrhages.

Author

Kagusa H, Yamaguchi I, Shono K, Mizobuchi Y, Shikata E, Matsuda T, Miyamoto T, Hara K, Kitazato KT, Uto Y, Kanematsu Y, and Takagi Y

Subjects
tau Proteins metabolism, Phosphoproteins metabolism, Amyloid beta-Peptides metabolism, Mice, Inbred C57BL, Male, Animals, Mice, Brain Injuries, Traumatic metabolism, Syringes, Disease Models, Animal, Brain metabolism
Abstract

Background: Cerebral microbleeds (CMBs) due to traumatic brain injuries (TBI) have been shown to lead to cognitive decline and impairment. CMBs caused by TBI may be associated with pathophysiological mechanisms involving inflammation and the accumulation of amyloid-β (Aβ), tau, and phosphorylated tau (p-tau), contributing to cognitive abnormalities. However, their relationships remain unclear., Objectives: To test our hypothesis that Aβ, tau, and p-tau are accumulated and regulated separately in mice with injuries imitating CMBs from TBI, we studied., Methods: Seven-week-old C57BL/6 male mice were injected with 15 μL of heparinized autologous blood or saline by micro-syringe into the front lobe. Expression profiles and regulation of Aβ, tau, and p-tau were assessed immunohistochemically over time., Results: On day 7 after blood injection, Iba-1 + and S100B + cells in damaged cortex adjacent to the injection site were higher than saline injection group and non-injected sham. On days 3-14, Aβ deposition were gradually increased but normalized by day 28. In contrast, tau/p-tau deposition gradually increased during days 14-28 and dispersed along the corticomedullary junction adjacent to hem deposits, indicating different expression profiles from Aβ. Deposits of Aβ, but not tau/p-tau, were phagocytosed by CD163 + macrophages increased by Gc-protein macrophage-activating factor during days 7-28, suggesting different mechanisms of deposition and regulation between Aβ and tau/p-tau., Conclusion: Deposition and regulation differ between Aβ and tau/p-tau in mice with injuries mimicking CMBs from TBI. Further clarification of relationships between the pathologies of cognitive impairment and their neurodegenerative consequences is needed., (Copyright © 2023 Elsevier B.V. All rights reserved.)

Published
2023
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48. Distinct Profiles of Desensitization of µ-Opioid Receptors Caused by Remifentanil or Fentanyl: In Vitro Assay with Cells and Three-Dimensional Structural Analyses.

Author

Uezono E, Mizobuchi Y, Miyano K, Ohbuchi K, Murata H, Komatsu A, Manabe S, Nonaka M, Hirokawa T, Yamaguchi K, Iseki M, Uezono Y, Hayashida M, and Kawagoe I

Subjects
Remifentanil pharmacology, Receptors, Opioid, mu metabolism, Analgesics, Opioid pharmacology, beta-Arrestins metabolism, Morphine, Receptors, Opioid metabolism, Fentanyl pharmacology
Abstract

Remifentanil (REM) and fentanyl (FEN) are commonly used analgesics that act by activating a µ-opioid receptor (MOR). Although optimal concentrations of REM can be easily maintained during surgery, it is sometimes switched to FEN for optimal pain regulation. However, standards for this switching protocol remain unclear. Opioid anesthetic efficacy is decided in part by MOR desensitization; thus, in this study, we investigated the desensitization profiles of REM and FEN to MOR. The efficacy and potency during the 1st administration of REM or FEN in activating the MOR were almost equal. Similarly, in β arrestin recruitment, which determines desensitization processes, they showed no significant differences. In contrast, the 2nd administration of FEN resulted in a stronger MOR desensitization potency than that of REM, whereas REM showed a higher internalization potency than FEN. These results suggest that different β arrestin-mediated signaling caused by FEN or REM led to their distinct desensitization and internalization processes. Our three-dimensional analysis, with in silico binding of REM and FEN to MOR models, highlighted that REM and FEN bound to similar but distinct sites of MOR and led to distinct β arrestin-mediated profiles, suggesting that distinct binding profiles to MOR may alter β arrestin activity, which accounts for MOR desensitization and internalization.

Published
2023
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49. Enantiomeric composition of natural pericosine A derived from Periconia byssoides and α-glycosidase inhibitory activity of (-)-enantiomer.

Author

Usami Y, Nakamura K, Mizobuchi Y, Mizuki K, Harusawa S, Yoneyama H, and Yamada T

Subjects
Chromatography, High Pressure Liquid methods, Shikimic Acid analogs & derivatives, Shikimic Acid chemistry, Stereoisomerism, Ascomycota chemistry
Abstract

Chiral high-performance liquid chromatography (HPLC) analysis of natural pericosine A, which appeared in literature first in 1977, from Periconia byssoides was conducted using a column CHIRALPAK® AD-H to determine the enantiomeric composition of the original mixture which was found to be 68: 32 mixtures of (+)- and (-)-enantiomer, respectively. Furthermore, two independently isolated samples of pericosine A from the same fungus were also analyzed to show the two peaks in the HPLC charts at approximate 1:1 ratio. These results concluded that pericosine A derived from Periconia byssoides was indeed an enantiomeric mixture. Synthesized enantiomers were subjected to evaluation of antitumor activity against three kinds of tumor cells (p388, L1210, HL-60), indicating moderate cytotoxicity against all three kinds of tumor cell lines, but significant difference in potency between the enantiomers was not observed. In contrast, when both the enantiomers of pericosine A were evaluated against five kinds of glycosidases-inhibitory activities (α- and β-glucosidases, α- and β-galactosidases, and α-mannosidase), an apparent difference on anti-glycosidase assay was found between the enantiomers: (-)-pericosine A inhibited α-glucosidase at IC 50 : 2.25 mM, and β-galactosidase at IC 50 : 5.38 mM, albeit the (+)-enantiomer showed inactivity against these five enzymes., (© 2022 Wiley Periodicals LLC.)

Published
2022
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50. A Novel Approach to Microvascular Decompression for Hemifacial Spasm: Method Description and Associated Outcomes.

Author

Nagahiro S, Mizobuchi Y, Nakajima K, and Takagi Y

Subjects
Facial Nerve surgery, Humans, Retrospective Studies, Treatment Outcome, Hemifacial Spasm surgery, Microvascular Decompression Surgery methods
Abstract

Background: Microvascular decompression (MVD) is the only potential cure for hemifacial spasm (HFS). However, traditional techniques such as the interposition method may have limited effect in some cases. Alternative techniques have been proposed; however, they can be more complex or difficult to perform than the standard approach., Objective: To describe a safe decompression technique-the "shelter method"-which involves creating a shelter-like space around the facial nerve root exit zone and present associated outcomes., Methods: Medical records and intraoperative findings of 92 patients with HFS who underwent MVD using the shelter method between April 1997 and March 2017 were retrospectively reviewed. As a historical control group, we included 53 patients who had undergone MVD by the traditional interposition method before March 1989. The patients were divided into 3 subgroups according to the arteries involved and degree or direction of arterial compression to the seventh nerve. Patient outcomes were assessed as excellent, good, fair, and poor according to the MVD scoring system of the Japan Society for MVD Surgery., Results: In the shelter method group, complete disappearance of HFS was achieved in 87 patients (94.6%). The curative rate of the shelter method group was significantly higher than that of the interposition method group. The overall complication rates were significantly lower in the shelter method group than in the interposition method group., Conclusion: Our findings indicate high curative and low complication rates of the shelter method, suggesting that it helps treat HFS caused by various types of arterial compression., (Copyright © Congress of Neurological Surgeons 2022. All rights reserved.)

Published
2022
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