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Your search keyword '"Kirino, Y."' showing total 27 results
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27 results on '"Kirino, Y."'

1. Variable pentrance of a familial progressive necrotising encephalopathy due to a novel tRNA(super lle) homoplasmic mutation in the mitochondrial genome

Author

Limongelli, A., Schaefer, J., Jackson, S., Invernizzi, F., Kirino, Y., Suzuki, T., Reichmann, H., and Zeviani, M.

Subjects
Mitochondrial diseases -- Genetic aspects, Mitochondrial diseases -- Research, Encephalopathy -- Genetic aspects, Encephalopathy -- Research, Genetic research, Health
Abstract

Results of a study conducted on a normal mother and two daughters with severe encephalopathy reported that mitochondrial disorders were due to homoplasmic mutations in tRNA genes characterized by extremely variable penetrance. This phenomenon has important consequences in the nosological characterisation, clinical management, and genetic counselling of mitochondrial disorders.

Published
2004

3. Hippocampal Damage Disrupts Eyeblink Conditioning in Mice Lacking Glutamate Receptor Subunit δ2

Author

Takatsuki, K., Kawahara, S., Kotani, S., Mori, H., Mishina, M., and Kirino, Y.

Abstract

Cerebellar long-term depression (LTD) at the parallel fiber-Purkinje cell synapses has been proposed to be a neural substrate for classical eyeblink conditioning. Mutant mice lacking the glutamate receptor subunit δ2 (GluRδ2), in which the cerebellar LTD is disrupted, exhibited a severe impairment in the delay eyeblink conditioning with a temporal overlap of CS and US. However, they learned normally trace and delay conditioning without CS-US overlap, suggesting a learning mechanism which does not require the cerebellar LTD.In the present study, we tested possible involvement of the hippocampus in this cerebellar LTD-independent learning. We examined effects of scopolamine and hippocampal lesion on the delay conditioning without CS-US overlap. TheGluRδ2 mutant mice that received scopolamine or aspiration of the dorsalhippocampus together with its overlying cortex exhibited a severe impairment in learning, while the control mutant mice that received saline or aspiration of the overlying cortex learned normally. In contrast, wild-type mice that received either treatment learned as normally as the control wild-type mice. These results suggest that the hippocampus is essential in the cerebellar LTD-independent learning in the GluRδ2 mutant mice, indicating a newrole of hippocampus in the paradigm with a short trace interval.

Published
2002
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4. Phospholipase Cbeta4 and protein kinase Calpha and/or protein kinase CbetaI are involved in the induction of long term depression in cerebellar Purkinje cells.

Author

Hirono, M, Sugiyama, T, Kishimoto, Y, Sakai, I, Miyazawa, T, Kishio, M, Inoue, H, Nakao, K, Ikeda, M, Kawahara, S, Kirino, Y, Katsuki, M, Horie, H, Ishikawa, Y, and Yoshioka, T

Abstract

Activation of the type-1 metabotropic glutamate receptor (mGluR1) signaling pathway in the cerebellum involves activation of phospholipase C (PLC) and protein kinase C (PKC) for the induction of cerebellar long term depression (LTD). The PLC and PKC isoforms that are involved in LTD remain unclear, however. One previous study found no change in LTD in PKCgamma-deficient mice, thus, in the present study, we examined cerebellar LTD in PLCbeta4-deficient mice. Immunohistochemical and Western blot analyses of cerebellum from wild-type mice revealed that PLCbeta1 was expressed weakly and uniformly, PLCbeta2 was not detected, PLCbeta3 was expressed predominantly in caudal cerebellum (lobes 7-10), and PLCbeta4 was expressed uniformly throughout. In PLCbeta4-deficient mice, expression of total PLCbeta, the mGluR1-mediated Ca(2+) response, and LTD induction were greatly reduced in rostral cerebellum (lobes 1-6). Furthermore, we used immunohistochemistry to localize PKCalpha, -betaI, -betaII, and -gamma in mouse cerebellar Purkinje cells during LTD induction. Both PKCalpha and PKCbetaI were found to be translocated to the plasmamembrane under these conditions. Taken together, these results suggest that mGluR1-mediated activation of PLCbeta4 in rostral cerebellar Purkinje cells induced LTD via PKCalpha and/or PKCbetaI.

Published
2001
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9. PDZ domain-dependent suppression of NF-kappaB/p65-induced Abeta42 production by a neuron-specific X11-like protein.

Author

Tomita, S, Fujita, T, Kirino, Y, and Suzuki, T

Abstract

It is widely believed that one of the causes of Alzheimer's disease (AD) is the generation and secretion of beta-amyloid (Abeta) from amyloid precursor protein in the brain. Here we report that a transcription factor, NF-kappaB/p65, induces increased secretion of amyloidogenic Abeta42 but not Abeta40. The kappaB motif-dependent production of Abeta42 was suppressed by binding of NF-kappaB/p65 to the PDZ domain of the X11-like protein (X11L), which a human homologue protein of LIN-10. The results suggest that the PDZ domain of X11L can control the ability of NF-kappaB/p65 to induce expression of protein(s) involved in Abeta42 production. The amino acids 161-163 in Rel homology domain (RHD) of NF-kappaB/p65 is important in interaction of NF-kappaB/p65 with X11L. Another subunit NF-kappaB/p50 and heterodimers of p65 and p50 do not bind to X11L. Our finding indicates NF-kappaB and X11L may, in novel way, regulate Abeta production in neuronal cells. Targeting X11L by specific therapy may provide the possibility to control the progression of AD.

Published
2000

10. Glutamate induces Cl− and K+ currents in the olfactory interneurons of a terrestrial slug

Author

Watanabe, S., Kawahara, S., and Kirino, Y.

Abstract

Abstract: Glutamate-induced responses in the procerebral neurons of the terrestrial slug Limax marginatus were examined using the nystatin-perforated patch recording technique applied in the voltage-clamp mode and local application of drugs. The procerebrum contains two types of interneurons with different spontaneous activities, bursting and nonbursting neurons. In the bursting neurons, a puff of glutamate evoked a rapidly desensitizing current followed by a smaller sustained current. The reversal potential of the early component showed that the current was mediated by Cl− ions, while the late component was presumed to be mediated by K+ ions. In the nonbursting neurons, glutamate evoked a sustained current with a strong outward rectification, and the current was mediated by K+ ions. Ibotenate selectively evoked the rapidly desensitizing response in the bursting neurons, whereas quisqualate evoked a non-desensitizing K+ current both in the bursting and nonbursting neurons. The glutamate-induced K+ current had similar characteristics with the spontaneous synaptic activities in the procerebrum neurons, suggesting the possibility that glutamate receptors are involved in the spontaneous oscillatory activity.

Published
1999
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11. Interaction of a neuron-specific protein containing PDZ domains with Alzheimer's amyloid precursor protein.

Author

Tomita, S, Ozaki, T, Taru, H, Oguchi, S, Takeda, S, Yagi, Y, Sakiyama, S, Kirino, Y, and Suzuki, T

Abstract

A novel protein, human X11-like (human X11L), contains a phosphotyrosine interaction (PI) domain and two PDZ domains and displays 55.2% amino acid homology with the human X11 (human X11). The PI domain of human X11L interacts with a sequence containing the NPXY motif found in the cytoplasmic domain of Alzheimer's amyloid precursor protein. A construct lacking the carboxyl-terminal domain, which comprises two PDZ domains (N + PI), enhances PI binding to APP, whereas another construct lacking an amino-terminal domain relative to PI domain (PI + C) suppresses PI binding to APP. Overexpression of full-length human X11L (N + PI + C) in cells that express APP695 stably decreased the secretion of Abeta40 but not that of Abeta42. However, overexpression of the PI domain alone and the N + PI construct in cells did not affect the secretion of Abeta despite their ability to bind to the cytoplasmic domain of Alzheimer's amyloid precursor protein. These observations suggest that the amino-terminal domain regulates PI binding to APP and that the carboxyl-terminal domain containing PDZ motifs is essential to modulate APP processing. Because expression of the human X11L gene is specific to brain, the present observations should contribute to shedding light on the molecular mechanism of APP processing in Alzheimer's disease.

Published
1999

12. Contributory presentations/posters

Author

Manoj, N., Srinivas, V., Surolia, A., Vijayan, M., Suguna, K., Ravishankar, R., Suguna, K., Surolia, A., Vijayan, M., Schwarzenbacher, R., Zeth, K., Diederichs, Kostner, G., Gries, A., Laggner, P., Prassl, R., Madhusudan, Akamine, Pearl, Xuong, Nguyen-huu, Taylor, Susan, Sagar, M., Ravishankar, R., Saikrishnan, K., Roy, S., Purnapatre, K., Handa, P., Varshney, U., Vijayan, M., Biswal, B., Sukumar, N., Vijayan, M., Rao, J., Johnson, A., Pattabhi, Vasantha, Krishna, S., Sastri, Mira, Savithri, H., Murthy, M., Pillai, Bindu, Kannan, Hosur, M., Kumar, Mukesh, Patwardhan, Swati, Kannan, K., Hosur, M., Padmanabhaa, B., Sasaki-Sugio, S., Nukaga, M., Matsuzaki, T., Karthikevan, S., Sharma, S., Sharma, A., Paramasivam, M., Kumar, P., Khan, J., Yadav, S., Srinivasan, A., Singh, T., Gourinath, S., Alam, Neelima, Srintvasan, A., Singh, T., Chandra, Vikas, Kaur, Punit, Betzel, Ch., Singh, T., Ghosh, S., Bera, A., Bhattacharya, S., Chakraborty, S., Pal, A., Mukhopadhyay, B., Dey, I., Haldar, U., Baneriee, Asok, Sevcik, Jozef, Solovicova, Adriana, Sekar, K., Sundaralingam, M., Betzel, Ch., Genov, N., Singh, T., Liang, Dong-cai, Jiang, Tao, Zhang, Ji-ping, Chang, Wen-rui, Jahnke, Wolfgang, Blommers, Marcel, Panchal, S., Hosur, R., Pillay, Bindu, Hosur, M., Mathur, Puniti, Srivatsun, S., Joshi, Ratan, Jaganathan, N., Chauhan, V., Atreya, H., Sahu, S., Chary, K., Govil, Girjesh, Adjadj, Elisabeth, Quinjou, Éric, Izadi-Pruneyre, Nadia, Blouquit, Yves, Mispelter, Joël, Heyd, Bernadette, Lerat, Guilhem, Milnard, Philippe, Desmadreil, Michel, Lin, Y., Rao, B., Raghunathan, Vidva, Chau, Mei, Rao, B., Pesais, Prashant, Srivastava, Sudha, Coutinho, Evans, Saran, Anil, Sapico, Leizl, Gesme, Jayson, Lijima, Herbert, Paxton, Raymond, Srikrishnan, Thamarapu, Grace, C., Nagenagowda, G., Lynn, A., Cowsik, Sudha, Sahu, Sarata, Chauhan, S., Bhattacharya, A., Chary, K., Govil, G., Kumar, Anil, Pellecchia, Maurizio, Zuiderweg, Erik, Kawano, Keiichi, Aizawa, Tomoyasu, Fujitani, Naoki, Hayakawa, Yoichi, Ohnishi, Atsushi, Ohkubo, Tadayasu, Kumaki, Yasuhiro, Hikichi, Kunio, Nitta, Katsutoshi, Rani Parvathy, V., Chary, K., Kini, R., Govil, G., Koshiba, Takumi, Kobashigawa, Yoshihiro, Yao, Min, Demura, Makoto, Nakagawa, Astushi, Tanaka, Isao, Kuwajima, Kunihiro, Nitta, Katsutoshi, Linge, Jens, Donoghue, Seán, Nilges, Michael, Chakshusmathi, G., Ratnaparkhi, Girish, Madhu, P., Varadarajan, R., Tetreau, C., Tourbez, M., Lavalette, D., Manno, M., Biagio, P., Martorana, V., Emanuele, A., Vaiana, S., Bulone, D., Palma-Vittorelli, M., Palma, M., Trivedi, V., Cheng, S., Chien, W., Yang, S., Francis, S., Chang, D., Batra, Renn, Geeves, Michael, Manstein, Dietmar, Trvlska, Joanna, Grochowski, Pawel, Geller, Maciej, Ginalski, K., Grochowski, P., Lesyng, B., Lavalette, P., Tetreau, C., Tourbez, M., Blouquit, Y., Roccatano, D., Amadei, A., Nola, A., Berendsen, H., Ho, Bosco, Curmi, P., Berry, H., Lairez, D., Pauthe, E., Pelta, J., Kothekar, V., Sahi, Shakti, Srinivasan, M., Singh, Anil, Madhusudnan, Kartha, Nandel, Fateh, Kaur, Harpreet, Nandel, Fateh, Singh, Balwinder, Jain, D., Feenstra, K., Berendsen, Herman, Tama, F., Sanejouand, Y., Go, N., Sharma, Deepak, Sharma, Sunita, Pasha, Santosh, Brahmachari, Samir, Viiavaraghavan, R., Makker, Jyoti, Dey, Sharmisllia, Kumar, S., Singh, T., Lakshmikanth, G., Krishnamoorthy, G., Mazhul, V., Zaitseva, E., Kierdaszuk, Borys, Widengren, J., Terry, B., Mets, Ü., Rigler, R., Swaminathan, R., Thamotharan, S., Yathindra, N., Shibata, Y., Chosrowjan, H., Mataga, N., Morisima, I., Chakraharty, Tania, Xiao, Ming, Cooke, Roger, Selvin, Paul, Branca, C., Faraone, A., Magazù, S., Maisano, G., Migliardo, P., Villari, V., Behere, Digambar, Deva, M., Brunori, M., Cutruzzolà, F., Gibson, Q., Savino, C., Travaglini-Allocatelli, C., Vallone, B., Prasad, Swati, Mazumdar, Shyamalava, Mitra, Samaresh, Soto, P., Fayad, R., Sukovataya, I., Tyulkova, N., Mamedov, Sh., Aktas, B., Canturk, M., Aksakal, B., Yilgin, R., Bogutska, K., Miroshnichenko, N., Chacko, S., DiSanto, M., Hypolite, J., Zheng, Y-M., Wein, A., Wojciechowski, M., Grycuk, T., Antosiewicz, J., Lesyng, B., Ceruso, Marc, Nola, Alfredo, Bandvopadhvay, Subhasis, Chatterjee, Bishnu, Choudhury, Devapriva, Thompson, Andrew, Stojanoff, Vivian, Pinkner, Jerome, Hultgren, Scott, Khight, Stefan, Flatters, Delphine, Goodfellow, Julia, Takazawatt, Fumi, Kanehisa, Minoru, Sasai, Masaki, Nakamura, Hironori, Sasai, Masaki, Han, Wang, Zheng, Yuan, Xin, Wang, Min, Pan, Bhakuni, Vlnod, Kulkarni, Sangeeta, Ahmad, Atta, Prakash, Koodathingal, Prajapati, Shashi, Surin, Alexey, Matsumoto, Tomoharu, Yang, Li, Nakagawa, Yuki, Kimura, Kazumoto, Amemiya, Yoshiyuki, Semisotnov, Gennady, Kihara, Hiroshi, Tayyab, Saad, Muzammil, Salman, Kumar, Yogesh, Kulkarni, Sangeeta, Prajapati, Shashi, Prakash, Koodathingal, Ahmad, Atta, Bhakuni, Vinod, Sundd, Monica, Kundu, Suman, Jagannadham, M., Kundu, Suman, Sundd, Monica, Jagannadham, Medicherla, Chandani, Bina, Dhar, Ruby, Sinha, Lalankumar, Warrier, Deepti, Mehrotra, Sonam, Khandelwal, Purnima, Seth, Subhendu, Hosur, R., Sasidhar, Y., Prabha, C., Gidwani, Arun, Ahmad, Atta, Kulkarni, Sangeeta, Madhusudan, K., Bhakuni, Vinod, Kinjo, Akira, Nishikawa, Ken, Chakravarty, Suvobrata, Varadarajan, Raghavan, Noyelle, K., Haezebrouck, P., Joniau, M., Dael, H., Dash, Sheffali, Jha, Indra, Bhat, Rajiv, Mohanty, Prasanna, Bandyopadhyay, A., Sonawat, H., Rao, Ch., Datta, Siddhartha, Rajaraman, K., Raman, B., Ramakrishna, T., Rao, Ch., Pande, A., Pande, J., Betts, S., Asherie, N., Ogun, O., King, J., Benedek, G., Sokolova, I., Tyulkova, N., Kalacheva, G., Sonoyama, Masashi, Yokoyama, Yasunori, Taira, Kunihiro, Mitaku, Shigeki, Nakazawal, Chicko, Sasakil, Takanori, Mukai, Yuri, Kamo, Naoki, Sonoyama, Masashi, Mitaku, Shigeki, Dalal, Seema, Regan, Lynne, Mukai, Yuri, Kamo, Naoki, Mituku, Shigeki, Roychoudhury, Mihir, Kumar, Devesh, Lőrinczv, Dénes, Könczöl, Franciska, Farkas, László, Belagyi, Joseph, Schick, Christoph, Thomson, Christy, Ananthanarayanan, Vettai, Alirzayeva, E., Baba-Zade, S., Gromiha, M., Oobatake, M., Kono, H., An, J., Uedaira, H., Sarai, A., Takano, Kazufumi, Yamagata, Yuriko, Yutani, Katsuhide, Jas, Gouri, Muñoz, Victor, Hofrichter, James, Eaton, William, Penoyar, Jonathan, Srikrishnan, Thamarapu, Lo Verde, Philip, Kardos, J., Bódi, Á., Venekei, I., Závodszky, P., Gráf, L., Szilágyi, András, Závodszky, Péter, Allan, R., Walshaw, J., Woolfson, D., Funahashi, Jun, Takano, Kazufumi, Yamagata, Yuriko, Yutani, Katsuhide, Gupta, Savan, Mazumdar, Shyamalava, Di Nola, A., Mangoni, M., Roccatano, P., Ramachandraiah, Gosu, Chandra, Nagasuma, Kothekar, V., Srinivasan, M., Sahi, Shakti, Chakraborty, S., Bhattacharya, S., Bera, A., Ghosh, S., Pal, A., Haldar, U., Mukhopadhyay, B., Baneriee, Asok, Ciani, Barbara, Woolfson, Derek, Nair, Usha, Kaur, Kanwal, Salunke, Dinakar, Swaminathan, Chittoor, Surolia, Avadhesha, Rigler, R., Pramanik, A., Jonasson, P., Kratz, G., Jansson, O., Nygren, P., Ståhl, S., Ekberg, K., Johansson, B., Uhlén, S., Uhlén, M., Jörnvall, H., Wahren, J., Welfle, Karin, Misselwitz, Rolf, Höhne, Wolfgang, Welfle, Heinz, Mazhul, V., Zaitseva, E., Mitskevich, L., Fedurkina, N., Kurganov, B., Jarori, Gotam, Maity, Haripada, Guharay, J., Sengupta, B., Sengupta, P., Sridevi, K., Kasturi, S., Gupta, S., Agarwal, Gunjan, Kwong, Suzanne, Briehl, Robin, Ismailova, O., N, Tyulkova, Hariharan, C., Pines, D., Pines, E., Zamai, M., Cohen-Luria, R., Yayon, A., Parola, A., Padya, M., Spooner, G., Woolfeon, D., Bakshi, Panchan, Sharma, Deepak, Sharma, Sunita, Bharadwaj, D., Pasha, Santosh, Sharma, U., Srivastava, N., Barthwal, R., Jagannathan, N., Matsuda, Keiko, Nishioka, Takaaki, Go, Nobuhiro, Aita, T., Urata, S., Husimi, Y., Majumder, Mainak, Chatterjee, Bishnu, Abrescia, Nicola, Malinina, Lucy, Subirana, Juan, Aymami, Juan, Eritxa, Ramón, Coll, Miquel, Premraj, B., Yathindra, N., Thenmalarchelvi, R., Yathindra, N., Kumar, P., Gautham, N., Kan, Lou, Ming-Hou, Lin, Shwu-Bin, Sana, Tapas, Roy, Kanal, Bruant, N., Flatters, D., Lavery, R., Genest, D., Rons, Remo, Sklenar, Heinz, Lavery, Richard, Kundu, Sudip, Bhattacharyya, Dhananjay, Bandyopadhyay, Debashree, Thakur, Ashoke, Majumdar, Rabi, Barceló, F., Portugal, J., Ramanathan, Sunita, Chary, K., Rao, B., Gliosli, Mahua, Kumar, N., Varshney, Umesh, Chary, K., Pataskar, Shashank, Brahmachari, Samir, Sarojini, R., Selvasekarapandian, S., Kolandaivel, P., Sukumar, S., Selvasekarapandian, S., Sarojini, R., Kolmdaivel, P., Sukumar, S., Sarojini, R., Selvasekarapandian, S., Kolandaivel, P., Sukumar, S., Selvasekarapandian, S., Sarojini, R., Kolandaivel, P., Sukumar, S., Maiti, Motilal, Sen, Anjana, Das, Suman, Terra, Elisa, Suraci, Chiara, Diviacco, Silvia, Quadrifoglio, Franco, Xodo, Luigi, Bandyopadhyay, Debashree, Bhattacharyya, Dhananjay, Kundu, Sudip, Thakur, Ashoke, Das, Suman, Ray, Arghya, Maiti, Motilal, Karthikeyan, G., Chary, Kandala, Rao, Basuthkar, Mujeeb, Anwer, James, Thomas, Kasyanenko, N., Haya, E., Bogdanov, A., Zanina, A., Bugs, M., Cornélio, M., Srikrishnan, Thamarapu, Tolstorukov, M., Sanval, Nitish, Tiwari, S., Tiwari, S., Sanyal, Nitish, Choudhury, Mihir, Kumar, Devesh, Sanyal, Nitish, Patel, P., Bhavesh, Neel, Hosur, R., Gabrielian, Anna, Wennmalm, Stefan, Edman, Lars, Rigler, Rudolf, Constantinescu, B., Radu, L., Radulcscu, I., Gazdaru, D., Wärmländer, Sebastian, Leijon, Mikael, Aoki, Setsuyuki, Kondo, Takao, Ishiura, Masahiro, Pashinskaya, V., Kosevich, M., Shelkovsky, V., Blagoy, Yu., Wang, Ji-hua, Malathi, R., Chandrasekhar, K., Premraj, B., Patel, P., Kandimalla, E., Agrawal, S., Hosur, R., Yathindra, N., Rastogi, V., Palafox, M., Singh, Chatar, Beniaminov, A., Bondarenko, S., Zdobnov, E., Minyat, E., Ulyanov, N., Ivanov, V., Singh, J., Sonawane, Kailas, Grosjean, Henri, Tewari, Ravindra, Sonavane, Uddhavesh, Morin, Annie, Grosjean, Henri, Tewari, Ravindra, Doherty, Elizabeth, Doudna, Jennifer, Tochio, H., Sato, S., Matsuo, H., Shirakawa, M., Kyogoku, Y., Javaram, B., Dixit, Surjit, Shukla, Piyush, Kalra, Parul, Das, Achintya, McConnell, Kevin, Beveridge, David, Sawyer, W., Chan, R., Eccelston, J., Yan, Yuling, Davidson, B., Ray, Arghya, Tuite, Eimer, Norden, Bengt, Nielsen, Peter, Takahashi, Masayuki, Ghosh, Anirban, Bansal, Manju, Christ, Frauke, Thole, Hubert, Wende, Wolfgang, Pingoud, Alfred, Pingoud, Vera, Luthra, Pratibha, Chandra, Ramesh, Sen, Ranjan, King, Rodney, Weisberg, Robert, Larsen, Olaf, Berends, Jos, Heus, Hans, Hilbers, Cornelis, Stokkum, Ivo, Gobets, Bas, Grondelle, Rienk, Amerongen, Herbert, Sngrvan, HE., Babayan, Yu., Khudaverdian, N., Kono, H., Gromiha, M., Pichierri, F., Aida, M., Prabakaran, P., Sayano, K., An, J., Uedaira, H., Sarai, A., Serva, Saulius, Merkienė, Eglė, Vilkaitis, Giedrius, Weinhold, Elmar, Klimašauskas, Saulius, Marsich, Eleonora, Bandiera, Antonella, Xodo, Luigi, Manzini, Giorgio, Potikyan, G., Arakelyan, V., Babayan, Yu., Ninaber, Alex, Goodfellow, Julia, Ito, Yoichiro, Ohta, Shigeru, Husimi, Yuzuru, Usukura, J., Tagami, H., Aiba, H., Suarez, Mougli, Nunes, Elia, Keszenman, Deborah, Candreva, E., Nunes, Elia, Thyberg, Per, Földes-Papp, Zeno, Rigler, Rudolf, Joshi, Amita, Rao, Basuthkar, Singh, Dinesh, Rajeswari, M., Ira, Krishnamoorthy, G., Pregetter, M., Prassl, R., Schwarzenbacher, R., Amenitsch, H., Chapman, J., Laggner, P., Pandev, B., Mishra, K., Pohl, E., Sun, J., Agapov, I., Tonevitsky, A., Pohl, P., Dennison, S., Guharay, J., Sengupta, P., Gorbeako, G., Dynbko, T., Pappavee, N., Mishra, A., Manuel, Prieto, Rodrigo, Almeida, Luis, Loura, Gendel, L., Przestalski, S., Kuczera, J., Kleszczyńska, H., Kral, T., Chernitsky, E., Senkovich, O., Rosin, V., Allakhverdieva, Y., Papageorgiou, G., Gasanov, R., Apetrei, Calin, Savopol, Tudor, Balea, Marius, Cucu, D., Mihailescu, D., Ramanathan, K., Bačić, Goran, Sajot, Nicolas, Garnier, Norbert, Crouzy, Serge, Genest, Monique, Várkonyi, Z., Zsiros, O., Farkas, T., Combos, Z., Cribier, Sophie, Fraceto, I., Schreier, S., Spisni, A., Paula, F., Sevšek, F., Gomišček, G., Arrigler, V., Svetina, S., Žekš, B., Nomura, Fumimasa, Nagata, Miki, Takiguchi, Kingo, Hotani, Hirokazu, Panicker, Lata, Parvathanathan, P., Ishino, A., Saitoh, A., Hotani, H., Takiguchi, K., Afonin, S., Takahashi, A., Nakato, Y., Takizawa, T., Marathe, Dipti, Mishra, K., Jørgensen, Kent, Rawat, Satinder, Nair, Usha, Rukmini, R., Chattopadhyay, Amitabha, Šentiurc, M., Štrancar, J., Stolič, Z., Filipin, K., Pečar, S., Chattopadhyay, Amitabha, Biswas, S., Rukmini, R., Sana, Satyen, Samanta, Anunay, Kinoshita, Koji, Yamazaki, Masahito, Ohba, Tetsuhiko, Kiuchi, Tai, Yoshitoshi, Kamakura, Goto, Akira, Kumeta, Takaaki, Ohki, Kazuo, Sugar, I., Thompson, T., Thompson, K., Biltonen, R., Suezaki, Y., Ichinose, H., Takiguchi, K., Hotani, H., Akivama, M., Matuoka, S., Tsuchihashi, K., Gasa, S., Mattjus, P., Molotkovsky, J., Pike, H., Brown, R., Arora, Ashish, Kleinschmidt, Jörg, Tamm, Lukas, Luneva, O., Gendel, L., Kruglyakova, K., Fedin, V., Kuptsoya, O., Borst, J., Visser, N., Visser, A., Dyubko, T., Ogihara, Toshihiko, Mishima, Kiyoshi, Shvaleva, A., Radenović, N., Minić, P., Jeremić, M., Radenović, Č., Aripov, T., Tadjibaeva, E., Vagina, O., Zamaraeva, M., Salakhutdinov, B., Cole, A., Poppofl, M., Naylor, C., Titball, R., Basak, A., Eaton, J., Naylor, C., Justin, N., Moss, D., Titball, R., Basak, A., Nomura, F., Nagata, M., Ishjkawa, S., Takiguchi, K., Takahashi, S., Hotani, H., Obuchi, Kaoru, Staudegger, Erich, Kriechbaum, Manfred, Lehrer, Robert, Waring, Alan, Lohner, Karl, Gangl, Susanne, Mayer, Bernd, Köhler, Gottfried, Shobini, J., Mishra, A., Guttenberg, Z., Lortz, B., Hu, B., Sackmann, E., Kozlova, N., Lukyanenko, L., Antonovich, A., Slobozhanina, E., Chernitsky, E., Krylov, Andrey, Antonenko, Yuri, Kotova, Elena, Yaroslavov, Alexander, Ghosh, Subhendu, Bera, Amal, Das, Sudipto, Urbánková, Eva, Jelokhani-Niaraki, Masood, Freeman, Karl, Jezek, Petr, Usmanov, P., Ongarbaev, A., Tonkikh, A., Pohl, Peter, Saparov, Sapar, Harikumar, P., Reeves, J., Rao, S., Sikdar, S., Ghatpande, A., Rao, S., Sikdar, S., Corsso, C., Campos de Carvalho, A., Varanda, W., ElHamel, C., Dé, E., Saint, N., Molle, G., Varshney, Anurae, Mathew, M., Loots, E., Isacoff, E., Kasai, Michiki, Yamaguchi, Naohiro, Ghosh, Paramita, Ghosh, Subhendu, Tigyi, Joseph, Tigyi, Gabor, Liliom, Karoly, Miledi, Ricardo, Djurisic, Maja, Andjus, Pavle, Shrivastava, Indira, Sansom, M., Barrias, C., Oliveira, P., Mauricio, A., Rebelo da Costa, A., Lopes, I., Barrias, C., Fedorovich, S., Chubanov, V., Sholukh, M., Konev, S., Fedirko, N., Manko, V., Klevets, M., Shvinka, N., Prabhananda, B., Kombrabail, Mamata, Aravamudhan, S., Venegas-Cotero, Berenice, Blake, Ivan, Zhang, Zhi-hong, Hu, Xiao-jian, Zhou, Han-qing, Cheng, Wei-ying, Feng, Hang-fang, Dubitsky, L., Vovkanvch, L., Zalyvsky, I., Savio-Galimberti, E., Bonazzola, P., Ponce-Homos, J., Parisi, Mario, Capurro, Claudia, Toriano, Roxana, Ready, Laxma, Jones, Larry, Thomas, David, Tashmukhamedov, B., Sagdullaev, B., Usmanov, P., Mauricio, A., Heitzmann, D., Warth, R., Bleich, M., Greger, R., Ferreira, K., Ferreira, H., Zagoory, Orna, Alfahel, Essa, Parola, Abraham, Priel, Zvi, Hama-Inaba, H., Wang, R., Choi, K., Nakajima, T., Haginoya, K., Mori, M., Ohyama, H., Yukawa, O., Hayata, I., Joshi, Nanda, Kannurpatti, Sridhar, Joshi, Preeti, Sinha, Mau, Shen, Xun, Hu, Tianhui, Bei, Ling, Knetsch, Menno, Schäfers, Nicole, Manstein, Dietmar, Sandblom, John, Galvanovskis, Juris, Pologea-Moraru, Roxana, Kovacs, Eugenia, Savopol, Tudor, Dinu, Alexandra, Sanghvi, S., Mishra, K., Jazbinšek, V., Thiel, G., Müller, W., Wübeller, G., Tronteli, Z., Fajmut, Leš, Marhl, Marko, Brumen, Milan, Volotovski, I., Sokolovski, S., Knight, M., Vasil’ev, Alexei, Chalyi, Alexander, Sharma, P., Steinbach, P., Sharma, M., Amin, N., Barchir, J., Albers, R., Pant, H., Balasubramanyam, M., Condrescu, M., Reeves, J., Gardner, J., Monajembashi, Shamci, Pilarczyk, Gotz, Greulich, K., Kovacs, Eugenia, El-Refaei, F., Talaat, M., El-Awadi, A., Ali, F., Tahradník, Ivan, Pavelková, Jana, Zahradniková, Alexandra, Zhorov, Boris, Ananthanaravanan, Vettai, Michailov, M., Neu, E., Seidenbusch, W., Gornik, E., Martin, D., Welscher, U., Weiss, D., Pattnaik, B., Jellali, A., Forster, V., Hicks, D., Sahel, J., Dreyfus, H., Picaud, S., Wang, Hong-Wei, Sui, Sen-fang, Luther, Pradeep, Barry, John, Morris, Ed, Squire, John, Sundari, C., Balasubramanian, D., Veluraia, K., Christlet, T., Suresh, M., Berry, H., Pelta, J., Lairez, D., Laretta-Garde, V., Krilov, Dubravka, Stojanović, Nataša, Herak, Janko, Jasuja, Ravi, Ivanova, Maria, Mirchev, Rossen, Ferrone, Frank, Stopar, David, Spruijt, Ruud, Wolfs, Cor, Hemminga, Marcus, Arcovito, G., Spirito, M., Sui, Sen-fang, Wang, Hong-Wei, Agrawal, Rajendra, Heagle, Amy, Penczek, Pawel, Grassucci, Robert, Frank, Joachim, Sharma, Manjuli, Jeyakumar, Loice, Fleischer, Sidney, Wagenknecht, Terence, Knupp, Carlo, Munro, Peter, Luther, Pradeep, Ezra, Eric, Squire, John, Ichihara, Koji, Kitazawa, Hidefumi, Iguchi, Yusuke, Hotani, Hirokazu, Itoh, Tomohiko, Pifat, Greta, Kveder, Marina, Pečar, Slavko, Schara, Milan, Nair, Deepak, Singh, Kavita, Rao, Kanury, Salunke, Dinakar, Kaur, Kanwaljeet, Jain, Deepti, Sundaravadivel, B., Goel, Manisha, Salunke, D., Kovalenko, E., Semenkova, G., Cherenkevich, S., Lakshmanan, T., Sriram, D., Srinivasan, S., Loganathan, D., Ramalingam, T., Lebrón, J., Bjorkman, P., Singh, A., Gayatri, T., Jain, Deepti, Kaur, Kanwaljeet, Sundaravadivel, B., Salunke, Dinakar, Caffarena, Ernesto, Grigera, J., Bisch, Paulo, Kiessling, V., Fromherz, P., Rao, K., Gaikwad, S., Khan, M., Suresh, C., Kaliannan, P., Gromiha, M., Elanthiraiyan, M., Chadha, K., Payne, J., Ambrus, J., Nair, M., Nair, Madhavan, Mahajan, S., Chadha, K., Hewitt, R., Schwartz, S., Bourguignon, J., Faure, M., Cohen-Addad, C., Neuburger, M., Ober, R., Sieker, L., Macherel, D., Douce, R., Gurumurthy, D., Velmurugan, S., Lobo, Z., Srivastava, Sudha, Phadke, Ratna, Govil, Girjesh, Desai, Prashant, Coutinho, Evans, Guseinova, I., Suleimanov, S., Zulfugarov, I., Novruzova, S., Aliev, J., Ismayilov, M., Savchenko, T., Alieva, D., Ilík, Petr, Kouřil, Roman, Bartošková, Hana, Nauš, Jan, Gaikwad, Jvoti, Thomas, Sarah, Vidyasagar, P., Garab, G., Simidjiev, I., Rajagopal, S., Várkonyi, Zs., Stoylova, S., Cseh, Z., Papp, E., Mustárdy, L., Holzenburg, A., Bruder, R., Genick, U., Woo, T., Millar, D., Gerwert, K., Getzoff, E., Jávorfí, Tamás, Garab, Győző, Naqvi, K., Kalimullah, Md., Gaikwad, Jyoti, Thomas, Sarah, Semwal, Manoj, Vidyasagar, P., Kouril, Roman, Ilik, Petr, Naus, Man, Pomozi, István, Horváth, Gábor, Wehner, Rüdiger, Bernard, Gary, Damjanović, Ana, Ritz, Thorsten, Schulten, Klaus, Jushuo, Wang, Jixiu, Shan, Yandao, Gong, Tingyun, Kuang, Nanming, Zhao, Freiberg, Arvi, Timpmann, Kõu, Ruus, Rein, Woodbury, Neal, Nemtseva, E., Kudryasheva, N., Sizykh, A., Shikhov, V., Nesterenko, T., Tikhomirov, A., Forti, Giorgio, Finazzi, Giovanni, Furia, Alberto, Barbagallo, Romina, Forti, Giorgio, Iskenderova, S., Agalarov, R., Gasanov, R., Osamu, Miyashita, Nobuhiro, G., Soni, R., Ramrakhiani, M., Yagi, Hiromasa, Tozawa, Kacko, Sekino, Nobuaki, Iwabuchi, Tomoyuki, Yoshida, Masasuke, Akutsu, Hideo, Avetisyan, A., Kaulen, A., Skulachev, V., Feniouk, B., Breyton, Cécile, Kühlbrandt, Werner, Assarsson, Maria, Gräslund, Astrid, Zsiros, O., Horváth, G., Mustárdy, L., Libisch, B., Gombos, Z., Budagovskaya, N., Kudryasheva, N., Harada, Erisa, Fukuoka, Yuki, Ohmura, Tomoaki, Fukunishi, Arima, Kawai, Gota, Watanabe, Kimitsuna, Akutsu, Hideo, Derganc, Jure, Božič, Bojan, Svetina, Saša, Žekš, Boštjan, Hoh, J., Li, Z., Rossmanith, G., Beer, E., Treijtel, B., Frederix, P., Blangè, T., Hénon, S., Galtet, F., Laurent, V., Planus, E., Isabey, D., Rath, L., Dash, P., Raval, M., Ramakrishnan, C., Balaram, R., Randic, Milan, Basak, Subhash, Vracko, Marjan, Nandy, Ashesh, Amic, Dragan, Beslo, Drago, Nikolic, Sonja, Trinajstic, Nenad, Walahaw, J., Woolfson, D., Lensink, Marc, Berendsen, Herman, Reddy, Boojala, Shindylov, Ilya, Bourne, Philip, Donnamaria, M., Xammar Oro, J., Grigera, J., Neagu, Monica, Neagu, Adrian, Praprotnik, Matej, Janežič, Dušanka, Mark, Pekka, Nilsson, Lennart, Martorana, V., Bulone, D., Fata, L., Manno, M., Biagio, P., Dardenne, Laurent, Werneck, Araken, Neto, Marçal, Bisch, Paulo, Kannan, N., Vishveshwara, S., Christlet, T., Veluraja, K., Grunwald, Gregory, Balaban, Alexandra, Basak, Kanika, Gute, Brian, Mills, Denise, Opitz, David, Balasubramanian, Krishnan, Mihalas, G., Lungeanu, Diana, Macovievici, G., Gruia, Raluca, Neagu, Monica, Cortez-Maghelly, C., Dalcin, B., Passos, E., Blesic, S., Ljubisavljevic, M., Milosevic, S., Stratimirovic, D., Bachhawat, Nandita, Mande, Shekhar, Ghosh, S., Nandy, A., Saito, Ayumu, Nishigaki, Koichi, Nishigaki, Koichi, Naimuddin, Mohammed, Mitaku, Shigeki, Hirokawa, Takatsugu, Ono, Mitsuo, Takaesu, Hirotomo, El Gohary, M., Ahmed, Abdalla, Eissa, A., Nakashima, Hiroshi, Nishikawa, Ken, Neagu, Monica, Neagu, Adrian, Raghava, G., Kurgalvuk, N., Goryn, O., Gerstman, Bernard, Gritsenko, E., Remmel, N., Maznyak, O., Kratasyuk, V., Esimbekova, E., Kratasyuk, V., Tchitchkan, D., Koulchitsky, S., Tikhonov, A., German, A., Pesotskaya, Y., Pashkevich, S., Pletnev, S., Kulchitsky, V., Duvvuri, Umamaheswar, Charagundla, Sridhar, Rizi, Rahim, Leigh, John, Reddy, Ravinder, Kumar, Mahesh, Coshic, O., Julka, P., Rath, O., Jagannathan, NR., Iliescu, Karina, Sajin, Maria, Moisoi, Nicolcta, Petcu, Ileana, Kuzmenko, A., Morozova, R., Nikolenko, I., Donchenko, G., Rahman, M., Ahmed, M., Naimuddin, Mohammed, Watanabe, Takehiro, Nishigaki, Koichi, Rubin, Y., Gilboa, H., Sharony, R., Ammar, R., Uretzky, G., Khubchandani, M., Mallick, H., Kumar, V., Jagannathan, N., Borthakur, Arijitt, Shapiro, Erik, Begum, M., Degaonkar, Mahaveer, Govindasamy, S., Dimitrov, Ivan, Kumosani, T., Bild, W., Stefanescu, I., Titescu, G., Iliescu, R., Lupusoru, C., Nastasa, V., Haulica, I., Khetawat, Gopal, Faraday, N., Nealen, M., Noga, S., Bray, P., Ananieva, T., Lycholat, E., Pashinskaya, V., Kosevich, MV., Stepanyan, S., Lycholat, E., Ananieva, T., Antonyuk, S., Khachatryan, R., Arakelian, H., Kumar, A., Ayrapetyan, S., Mkheyan, V., Agadjanyan, S., Khachatryan, A., Rajan, S., Kabaleeswaran, V., Malathi, R., Gopalakrishnan, Geetha, Govindachari, T., Ramrakhiani, Meera, Lowe, Phillip, Badley, Andrew, Cullen, David, Hermel, H., Schmahl, W., Möhwald, H., Singh, Anil, Majumdar, Nirmalya, Das, Joydip, Madhusudnan, Kartha, Dér, András, Kelemen, Loránd, Oroszi, László, Hámori, András, Ramsden, Jeremy, Ormos, Pál, Savitri, D., Mitra, Chanchal, Yanagida, Toshio, Esaki, Seiji, Kimura, Yuji, Nishida, Tomoyuki, Sowa, Yosiyuki, Radu, M., Koltover, V., Estrin, Ya., Kasumova, L., Bubnov, V., Laukhina, E., Dotta, Rajiv, Degaonkar, M., Raghunathan, P., Jayasundar, Rama, Jagannathan, N., Novák, Pavel, Marko, Milan, Zahradník, Ivan, Hirata, Hiroaki, Miyata, Hidetake, Ohki, Kazuo, Balaji, J., Sengupta, P., Maiti, S., Gonsalves, M., Barker, A., Macpherson, J., O’Hare, D., Winlove, C., Unwin, P., Sengupta, P., Phillip, R., Banerjee, S., Kumar, G., Maiti, S., Nagayaka, K., Danev, R., Sugitani, S., Murata, K., Gősch, Michael, Blom, H., Thyberg, P., Földes-Papp, Z., Björk, G., Holm, J., Heino, T., Rigler, Rudolf, Yokochi, Masashi, Inagaki, Fuyuhiko, Kusunoki, Masami, Matthews, E., Pines, J., Chukova, Yu., Koltover, Vitaly, Bansal, Geetanjali, Singh, Uma, Bansal, M., Nakata, Kotoko, Nakano, Tastuya, Kaminuma, Tsuguchika, Kang, B., Singh, U., Kirn, Bonn, Potocnik, Neja, Stare, Vito, Shukla, Latal, Natarajan, V., Devasagayam, T., Sastry, M., Kesavan, P., Sayfutdinov, R., Adamovich, V., Rogozin, D., Degermendzhy, A., Khetrapal, C., Ramanathan, K., Gowda, G., Ghimire, Kedar, Masaru, Ishida, Fujita, H., Ishiwata, S., Kishimoto, Y., Kawahara, S., Suzuki, M., Mori, H., Mishina, M., Kirino, Y., Ohshima, H., Dukhin, A., Shilov, V., Goetz, P., Sengupta, B., Guharay, J., Sengupta, P., and Mishra, R.

Published
1999
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14. A basic amino acid in the cytoplasmic domain of Alzheimer's beta-amyloid precursor protein (APP) is essential for cleavage of APP at the alpha-site.

Author

Tomita, S, Kirino, Y, and Suzuki, T

Abstract

In Alzheimer's disease (AD), the beta-amyloid peptide (Abeta) is thought to be produced as a result of the aberrant metabolism of beta-amyloid precursor protein (APP). We report that the APP cytoplasmic domain contains a novel and important signal for APP metabolism. A single amino acid mutation that changed arginine at amino acid 747 of APP770 (corresponding to position 672 of APP695) to a non-basic amino acid greatly increased the production of intracellular APP carboxyl-terminal fragment(s) cleaved at beta-site(s) (CTFbeta), but did not result in increased secretion of Abeta40 and Abeta42. This was not due to a simple intracellular accumulation of CTFbeta resulting from a lack of gamma-secretase. CTFbeta derived from this mutant APP was generated and degraded as efficiently as CTFbeta derived from wild-type APP. This result indicates that the increase in the quantity of CTFbeta does not always give rise to more Abeta production, as was previously suggested by studies of a familial AD mutation of APP. These findings suggest that APP carrying the substitution mutation at this basic amino acid may be metabolized by another protein secretory pathway. Although these results have not completely elucidated why CTFbeta derived from the mutant APP escapes from subsequent cleavage by gamma-secretase, analysis of the processing pathway of this mutant APP should provide insights into the pathogenesis of the sporadic type of AD.

Published
1998

16. Behavioral modulation induced by food odor aversive conditioning and its influence on the olfactory responses of an oscillatory brain network in the slug Limax marginatus.

Author

Kimura, T, Toda, S, Sekiguchi, T, and Kirino, Y

Abstract

We compared behaviorally and physiologically the olfactory responses of slugs (Limax marginatus) that had been subjected to aversive, appetitive, or unpaired training with food odors (carrot or cucumber). In the aversive training, the slugs were exposed to the food odor as a conditioned stimulus (CS), and then quinidine sulfate solution as an unconditioned stimulus (UCS) was immediately applied to the lip of the slugs. This training caused a decrease in preference level for the CS. The unpaired training, in which the CS and the UCS were presented to the slugs with a 5-min interval, induced no change in the preference level for the CS. In the appetitive training, the slugs were allowed to eat the CS odor source without UCS application. When we used nonstarved slugs, it was found that the preference level for the CS increased upon the appetitive training. These results indicate that each training changed the preference for the odors in a characteristic manner. In the physiological experiments, we used brain-inferior tentacular nose preparations isolated from slugs and investigated the olfactory responses of the oscillations in the local field potential (LFP) of the procerebral (PC) lobe. We found that odor presentation induced various types of changes in the LFP oscillation frequency, although the rate of occurrence of the frequency modulation differed between odors used in the aversive and the unpaired training (aversive-conditioned and unpaired odors). The aversive-conditioned odors induced a decrease in the oscillatory frequency. Unpaired odors did not change it. Moreover, odors used in the appetitive training (appetitive-conditioned odors) induced an increase in the frequency. Thus, it was considered that those modulations of PC lobe oscillatory activity were independent of odor and reflected learned preference for odors.

Published
1998

17. Cleavage of Alzheimer's amyloid precursor protein (APP) by secretases occurs after O-glycosylation of APP in the protein secretory pathway. Identification of intracellular compartments in which APP cleavage occurs without using toxic agents that interfere with protein metabolism.

Author

Tomita, S, Kirino, Y, and Suzuki, T

Abstract

beta-Amyloid peptide (Abeta) is a principal component of parenchymal amyloid deposits in Alzheimer's disease. Abeta is derived from amyloid precursor protein (APP) by proteolytic cleavage. APP is subject to N- and O-glycosylation and potential tyrosine sulfation, following protein synthesis, and is then thought to be cleaved in an intracellular secretory pathway after or during these post-translational modifications. Studies utilizing agents that affect a series of steps in the protein secretory pathway have identified the possible intracellular sites of APP cleavage and Abeta generation within the protein secretory pathway. In the present study, using cells with normal protein metabolism, but expressing mutant APP with defective O-glycosylation, we demonstrated that the majority of APP cleavage by alpha-, beta-, and gamma-secretases occurs after O-glycosylation. Cells expressing the mutant APP noticeably decreased the generation of the intracellular APP carboxyl-terminal fragment (alphaAPPCOOH), a product of alpha-secretase, and both Abeta40 and Abeta42 in medium, a product of beta- and gamma-secretases. Furthermore, we found that the cells accumulate the mutant APP in intracellular reticular compartments such as the endoplasmic reticulum. Agents that could ambiguously affect the function of specific intracellular organelles and that may be toxic were not used. The present results indicate that APP is cleaved by alpha-, beta-, and gamma-secretases in step(s) during the transport of APP through Golgi complex, where O-glycosylation occurs, or in compartments subsequent to trans-Golgi of the APP secretory pathway.

Published
1998

18. Ion Channel Activity of a Synthetic Peptide with a Primary Structure Corresponding to the Presumed Pore-Forming Region of the Voltage Dependent Potassium Channel

Author

Shinozaki, K., Anzai, K., Kirino, Y., Lee, S., and Aoyagi, H.

Abstract

A 26-mer peptide of which the sequence contains the presumed pore forming region of the Shaker K+channel (H5 region) was chemically synthesized. The peptide was found to interact and penetrate lipid membranes based on the fluorescence of Trp residues of the peptide in the presence and absence of liposomes. The secondary structure and the ion channel forming ability of the peptide were measured by CD spectroscopy and by a planar bilayer technique, respectively. The secondary structure of the peptide was composed of a mixture of an α-helix, β-sheet, β-turn, and a random coil. The content of β-sheet structure was increased by the presence of liposomes. In planar bilayers, the peptide formed anion-selective ion channels with a larger conductance than that of the native Shaker K+channel. These results suggest that the H5 region of the Shaker K+channel can penetrate into lipid bilayers and form ion channel structures by itself, but it requires other structural components to reproduce the native characteristics of the K+channel.

Published
1994
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19. Asymmetrical Lipid Charge Changes the Subconducting State of the Potassium Channel from Sarcoplasmic Reticulum

Author

Anzai, K., Takano, C., Tanaka, K., and Kirino, Y.

Abstract

The K+channel of sarcoplasmic reticulum was incorporated into planar lipid bilayers having various net surface charges. The conductance of both the main-state and substate increased with the increase in negative charges of the membrane and vice versa. The change in the conductance of the substate was larger than that of the main-state. The K+channel reconstituted into asymmetrical planar lipid bilayers revealed that the effect on the substate was derived from only one half (trans) of the bilayer. The substate of the K+channel may assume a conformation in which part of the channel located at the transside is susceptible to some changes induced by the transsurface charge.

Published
1994
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20. Time-Resolved Imaging of Protein Kinase C Activation during Sea Urchin Egg Fertilization

Author

de Barry, J., Kawahara, S., Takamura, K., Janoshazi, A., Kirino, Y., Olds, J.L., Lester, D.S., Alkon, D.L., and Yoshioka, T.

Abstract

To study protein kinase C (PKC) activation during sea urchin egg fertilization we used three different fluorescent probes specific for PKC, namely, fim-1, which recognizes the catalytic site of the enzyme, and BODIPY- and NBD-phorbol esters interacting with the PKC regulatory domain. We were able to follow PKC activation during the early steps of fertilization, the three different probes giving the same fluorescent pattern. Within 120 s following insemination, the fluorescent signal increased and clustered in the cortical zone of the cell. The process was Ca2+dependent and was inhibited in the presence of staurosporine, a PKC inhibitor. According to ourin vitroprobe characterization, this signal increase is due to PKC activation. These findings were further confirmed by Western blot analysis. This initial phase was followed by a rapid decrease which might be attributed to PKC hydrolysis by Ca2+-dependent proteases. The kinetics and the site distribution of PKC activation appear in complete agreement with the putative functions previously suggested for PKC during fertilization.

Published
1997
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22. Optical recording analysis of olfactory response of the procerebral lobe in the slug brain.

Author

Kimura, T, Toda, S, Sekiguchi, T, Kawahara, S, and Kirino, Y

Abstract

We studied the oscillatory properties and the olfactory responses of the procerebral (PC) lobe of the cerebral ganglion in the terrestrial mollusc Limax marginatus. The PC lobe, a central olfactory organ in Limax, is a highly interconnected network of local interneurons that receives olfactory inputs from the inferior and superior tentacular noses. We used an optical recording technique with a voltage-sensitive dye to record the activity of the PC lobe from either the posterior or the dorsal surface. The recordings revealed that almost all PC interneurons showed spontaneous oscillatory activities that had been entrained with each other. Upon presentation to the nose of odors to which the slugs had been aversively conditioned, the basal level of the oscillation changed biphasically. In the early phase of the response, depolarization in the basal level of the oscillation occurred in one or more belt-shaped regions parallel to the dorsoventral axis. In the late phase of the response, hyperpolarization of basal potential level of the PC lobe oscillations occurred in a wider area. Such spatial and temporal modulation was not observed when the unpaired control odors were presented to the preparation, whereas the same preparations responded to the aversively conditioned stimuli. Thus, it was considered that the spatial and temporal response in the basal level of oscillation was specific to the aversively conditioned odors. Furthermore, the spatial pattern of the depolarization modulation in the early phase was repeatable in multiple trials performed using the same odor, although different odors produced different spatial patterns of the modulation. From these results, we conclude that in the PC lobe learned odors are represented as spatial and temporal activity patterns of oscillators that constitute a coherent network.

Published
1998

24. Erratum

Author

Shinozaki, K., Anzai, K., Kirino, Y., Lee, S., and Aoyagi, H.

Published
1994
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25. ChemInform Abstract: Development of a Fluorescent Indicator for Nitric Oxide Based on the Fluorescein Chromophore.

Author

KOJIMA, H., SAKURAI, K., KIKUCHI, K., KAWAHARA, S., KIRINO, Y., NAGOSHI, H., HIRATA, Y., and NAGANO, T.

Abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Published
1998
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