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1. Setting of the Poincar\'e section for accurately calculating the phase of rhythmic spatiotemporal dynamics

Author

Arai, Takahiro, Kawamura, Yoji, and Aoyagi, Toshio

Subjects
Nonlinear Sciences - Adaptation and Self-Organizing Systems, Physics - Data Analysis, Statistics and Probability
Abstract

The synchronization analysis of limit-cycle oscillators is prevalent in many fields, including physics, chemistry, and life sciences. It relies on the phase calculation that utilizes measurements. However, the synchronization of spatiotemporal dynamics cannot be analyzed because a standardized method for calculating the phase has not been established. The presence of spatial structure complicates the determination of which measurements should be used for accurate phase calculation. To address this, we explore a method for calculating the phase from the time series of measurements taken at a single spatial grid point. The phase is calculated to increase linearly between event times when the measurement time series intersects the Poincar\'e section. The difference between the calculated phase and the isochron-based phase, resulting from the discrepancy between the isochron and the Poincar\'e section, is evaluated using a linear approximation near the limit-cycle solution. We found that the difference is small when measurements are taken from regions that dominate the rhythms of the entire spatiotemporal dynamics. Furthermore, we investigate an alternative method where the Poincar\'e section is applied to the time series obtained through orthogonal decomposition of the entire spatiotemporal dynamics. We present two decomposition schemes that utilize the principal component analysis. For illustration, the phase is calculated from the measurements of spatiotemporal dynamics exhibiting target waves or oscillating spots, simulated by weakly coupled FitzHugh-Nagumo reaction-diffusion models., Comment: 28 pages, 15 figures

Published
2024

5. Extracting phase coupling functions between collectively oscillating networks directly from time-series data

Author

Arai, Takahiro, Kawamura, Yoji, and Aoyagi, Toshio

Subjects
Nonlinear Sciences - Adaptation and Self-Organizing Systems, Physics - Data Analysis, Statistics and Probability
Abstract

Many real-world systems are often regarded as weakly coupled limit-cycle oscillators, in which each oscillator corresponds to a dynamical system with many degrees of freedom that have collective oscillations. One of the most practical methods for investigating the synchronization properties of such a rhythmic system is to statistically extract phase coupling functions between limit-cycle oscillators directly from observed time-series data. In Particular, using a method that combines phase reduction theory and Bayesian inference, the phase coupling functions can be extracted from the time-series data of even just one variable in each oscillatory dynamical system with many degrees of freedom. However, it remains unclear how the choice of the observed variables affects the statistical inference for the phase coupling functions. In this study, we examine the influence of observed variable types on the extraction of phase coupling functions using some typical dynamical elements under various conditions. We demonstrate that our method can consistently extract the macroscopic phase coupling functions between two phases representing collective oscillations in a fully locked state, regardless of the observed variable types; for example, even using one variable of any element in one system and the mean-field value over all the elements in another system. We also study the case of globally coupled phase oscillators in a partially locked state. Our results reveal directional asymmetry in the robustness of extracting the macroscopic phase coupling function between two networks. For instance, when an asynchronous oscillator in network $A$ and the macroscopic collective oscillation of network $B$ is observed, the macroscopic phase coupling function from network $A$ to network $B$ can be extracted more robustly than in the opposite direction., Comment: 17 pages, 10 figures

Published
2021
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12. Proton pump inhibitors affect capecitabine efficacy in patients with stage II–III colorectal cancer: a multicenter retrospective study

Author

Kitazume, Yoshiko, Kawazoe, Hitoshi, Uozumi, Ryuji, Yoshizawa, Tomoe, Iihara, Hirotoshi, Fujii, Hironori, Takahashi, Masaya, Arai, Takahiro, Murachi, Yasushi, Sato, Yumiko, Mikami, Takahiro, Hashiguchi, Koji, Yamazaki, Tomoko, Takahashi, Katsuyuki, Fujita, Yukiyoshi, Hosokawa, Yuki, Morozumi, Issei, Tsuchiya, Masami, Yokoyama, Atsushi, Hashimoto, Hironobu, and Yamaguchi, Masakazu

Published
2022
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13. Relationship between intraocular pressure-lowering effects and alterations in scleral birefringence following micropulse cyclophotocoagulation

Author

Nemoto, Hotaka, primary, Honjo, Megumi, additional, Okamoto, Michiaki, additional, Tominaga, Sou, additional, Yamanari, Masahiro, additional, Aoyama, Yurika, additional, Arai, Takahiro, additional, Ishiyama, Yukako, additional, Sugimoto, Koichiro, additional, Sakata, Rei, additional, Saito, Hitomi, additional, Fujishiro, Takashi, additional, and Aihara, Makoto, additional

Published
2024
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16. Variations in Neonatal Length of Stay of Babies Born Extremely Preterm: An International Comparison Between iNeo Networks

Author

Lui, Kei, Marshall, Peter, Schmidt, Peter, Dhawan, Anjali, Korostenski, Larissa, Travadi, Javeed Travadi, Sharp, Mary, Gill, Andy, Pillow, Jane, Stack, Jacqueline, Birch, Pita, Nothdurft, Karen, Cooke, Lucy, Casalaz, Dan, Holberton, Jim, Stewart, Alice, Downe, Lyn, Stewart, Michael, Berry, Andrew, Hunt, Rod, Morris, Peter, Paoli, Tony De, Bolisetty, Srinivas, Paradisis, Mary, Greenhalgh, Mark, Koorts, Pieter, Kuschel, Carl, Jacobs, Sue, Doyle, Lex, Craven, John, Numa, Andrew, Carlisle, Hazel, Badawi, Nadia, Popat, Himanshu, Koh, Guan, Davis, Jonathan, Luig, Melissa, Headley, Bevan, Andersen, Chad, Ng, Linda, Chambers, Georgina, Austin, Nicola, Lynn, Adrienne, Darlow, Brian, Edmonds, Liza, Mildenhall, Lindsay, Buksh, Mariam, Battin, Malcolm, Boom, Jutta van den, Richardson, Vaughan, Barker, David, Hammond, Barbara, Rajadurai, Victor Samuel, Lam, Simon, Fung, Genevieve, Shah, Prakesh S., Beltempo, Marc, Kanungo, Jaideep, Ting, Joseph, Cieslak, Zenon, Sherlock, Rebecca, Mehrem, Ayman Abou, Toye, Jennifer, Aziz, Khalid, Fajardo, Carlos, Bodani, Jaya, Strueby, Lannae, Seshia, Mary, Louis, Deepak, Alvaro, Ruben, Mukerji, Amit, Da Silva, Orlando, Adie, Mohammad, Lee, Kyong-Soon, Ng, Eugene, Lemyre, Brigitte, Daboval, Thierry, Khurshid, Faiza, Pelausa, Ermelinda, Barrington, Keith, Lapoint, Anie, Ethier, Guillaume, Drolet, Christine, Piedboeuf, Bruno, Claveau, Martine, St-Hilaire, Marie, Bertelle, Valerie, Masse, Edith, Canning, Roderick, Makary, Hala, Ojah, Cecil, Monterrosa, Luis, Emberley, Julie, Afifi, Jehier, Kajetanowicz, Andrzej, Lee, Shoo K., Metsäranta, Marjo, Lehtonen, Liisa, Tammela, Outi, Sankilampi, Ulla, Saarela, Timo, Morag, Iris, Zangen, Shmuel, Smolkin, Tatyana, Mimouni, Francis, Bader, David, Rothschild, Avi, Strauss, Zipora, Felszer, Clari, Omari, Hussam, Tov-Friedman, Smadar Even, Bar-Oz, Benjamin, Feldman, Michael, Saad, Nizar, Flidel-Rimon, Orna, Weisbrod, Meir, Lubin, Daniel, Litmanovitz, Ita, Kugelman, Amir, Shinwell, Eric, Klinger, Gil, Nijim, Yousif, Bin-Nun, Alona, Golan, Agneta, Mandel, Dror, Fleisher-Sheffer, Vered, Oron, Anat, Bakhrakh, Lev, Hattori, Satoshi, Shirai, Masaru, Ishioka, Toru, Mori, Toshihiko, Amizuka, Takasuke, Huchimukai, Toru, Yoshida, Hiroshi, Sasaki, Ayako, Shimizu, Junichi, Nakamura, Toshihiko, Maruyama, Mami, Matsumoto, Hiroshi, Hosokawa, Shinichi, Taki, Atsuko, Nakagawa, Machiko, Ko, Kyone, Uozumi, Azusa, Nakata, Setsuko, Shimazaki, Akira, Yoda, Tatsuya, Numata, Osamu, Imamura, Hiroaki, Kobayashi, Azusa, Tokuriki, Shuko, Uchida, Yasushi, Arai, Takahiro, Ito, Mitsuhiro, Ieda, Kuniko, Ono, Toshiyuki, Hayashi, Masashi, Maki, Kanemasa, Yamakawa, MieToru, Kawai, Masahiko, Fujii, Noriko, Shiomi, Kozue, Nozaki, Koji, Wada, Hiroshi, Kim, Taho, Tokunaga, Yasuyuki, Takatera, Akihiro, Oshima, Toshio, Sumida, Hiroshi, Michinomae, Yae, Kusumoto, Yoshio, Yoshimoto, Seiji, Morisawa, Takeshi, Ohashi, Tamaki, Takahashi, Yukihiro, Sugimoto, Moriharu, Ono, Noriaki, Miyagawa, Shinichiro, Saijo, Takahiko, Yamagami, Takashi, Koyano, Kosuke, Kobayashi, Shoko, Kanda, Takeshi, Sakemi, Yoshihiro, Aoki, Mikio, Iida, Koichi, Goshi, Mitsushi, Maruyama, Yuko, Avila-Alvarez, Alejandro, Fernandez-Trisac, José Luis, Pico, M<ce:sup loc='post">a</ce:sup> Luz Couce, Fernández Seara, María José, Gutiérrez, Andrés Martínez, Vizcaíno, Carolina, Iglesias, Miriam Salvador, Zaplana, Honorio Sánchez, Colomer, Belén Fernández, García López, José Enrique, Mozo, Rafael García, González Martínez, M. Teresa, Sebastián, M<ce:sup loc='post">a</ce:sup> Dolores Muro, Carbonell, Marta Balart, Barnusell, Joan Badia, Puiggròs, Mònica Domingo, Aloy, Josep Figueras, Mussons, Francesc Botet, Sanz, Israel Anquela, Galiana, Gemma Ginovart, Coroleu, W., Iriondo, Martin, Vilella, Laura Castells, Porta, Roser, Demestre, Xavier, Nadal, Silvia Martínez, de Frutos Martínez, Cristina, López Cuesta, María Jesús, Mora, Dolores Esquivel, Tardío, Joaquín Ortiz, Benavente, Isabel, Alonso, Almudena, Olmos, Ramón Aguilera, García Cabezas, Miguel A., Jiménez, M<ce:sup loc='post">a</ce:sup> Dolores Martínez, Caballero, M<ce:sup loc='post">a</ce:sup> Pilar Jaraba, Díaz, M<ce:sup loc='post">a</ce:sup> Dolores Ordoñez, Fagundo, Alberto Trujillo, Canals, Lluis Mayol, García-Muñoz Rodrigo, Fermín, Martí, Lourdes Urquía, Moreno Galdo, María Fernanda, Suazo, José Antonio Hurtado, López, Eduardo Narbona, Fernández, José Uberos, Cortajarena Altuna, Miguel A., Zuriarrain, Oihana Muga, Navarro, David Mora, Domínguez, María Teresa, Ruiz del Prado, M<ce:sup loc='post">a</ce:sup> Yolanda, Díez, Inés Esteban, Palau Benavides, María Teresa, Lapeña, Santiago, Prada, Teresa, Mir, Eduard Soler, Sánchez, Araceli Corredera, Vega, Enrique Criado, Prado, Náyade del, Fernández, Cristina, Vilaplana, Lucía Cabanillas, Pérez, Irene Cuadrado, Gómez, Luisa López, Comeche, Laura Domingo, Martín, Isabel Llana, Armengod, Carmen González, Labián, Carmen Muñoz, Muñoz, M<ce:sup loc='post">a</ce:sup> José Santos, Bravo, Dorotea Blanco, Pérez, Vicente, Fernández, M<ce:sup loc='post">a</ce:sup> Dolores Elorza, González, Celia Díaz, Segura, Susana Ares, Azorín, Manuela López, Jimenez, Ana Belén, Sánchez-Tamayo, Tomás, Moreno, Elías Tapia, González, María, Sánchez Martínez, José Enrique, Lloreda García, José María, Orayen, Concepción Goñi, González, Javier Vilas, Albo, María Suárez, Colmenero, Eva González, Gutiérrez González, Elena Pilar, Vacas del Arco, Beatriz, Fernández, Josefina Márquez, Gordillo, Laura Acosta, Asensio, Mercedes Granero, Díaz, Carmen Macías, Albújar, Mar, Jorge, Pedro Fuster, Romero, Sabina, Falero, Mónica Rivero, Escobar Izquierdo, Ana Belén, Capell, Javier Estañ, Macián, M<ce:sup loc='post">a</ce:sup> Isabel Izquierdo, Vicente, M<ce:sup loc='post">a</ce:sup> Mar Montejo, Caballero, Raquel Izquierdo, Martínez, M<ce:sup loc='post">a</ce:sup> Mercedes, Euba, Aintzane, Serna, Amaya Rodríguez, López de Heredia Goya, Juan María, Legorburu, Alberto Pérez, Amorós, Ana Gutiérrez, Marugán Isabel, Víctor Manuel, González, Natalio Hernández, Gracia, Segundo Rite, Faci, M<ce:sup loc='post">a</ce:sup> Purificación Ventura, Villagrasa, M<ce:sup loc='post">a</ce:sup> Pilar Samper, Kofron, Jiri, Brodd, Katarina Strand, Odlind, Andreas, Alberg, Lars, Arwehed, Sofia, Hafström, Ola, Kasemo, Anna, Nederman, Karin, Åhman, Lars, Ingemarsson, Fredrik, Petersson, Henrik, Thurn, Pernilla, Albinsson, Eva, Selander, Bo, Abrahamsson, Thomas, Heimdahl, Ingela, Sveinsdottir, Kristbjorg, Wejryd, Erik, Hedlund, Anna, Söderberg, Maria Katarina, Navér, Lars, Brune, Thomas, Bäckström, Jens, Robinson, Johan, Farooqi, Aijaz, Normann, Erik, Fredriksson, Magnus, Palm, Anders, Rosenqvist, Urban, Walde, Bengt, Hagman, Cecilia, Ohlin, Andreas, Florell, Rein, Smedsaas-Löfvenberg, Agneta, Adams, Mark, Meyer, Philipp, Kusche, Rachel, Schulzke, Sven, Nelle, Mathias, Wagner, Bendicht, Riedel, Thomas, Kaczala, Grégoire, Pfister, Riccardo E., Tolsa, Jean-François, Roth, Matthias, Stocker, Martin, Laubscher, Bernhard, Malzacher, Andreas, Micallef, John P., Hegi, Lukas, Bassler, Dirk, Arlettaz, Romaine, Bernet, Vera, Dani, Carlo, Fiorini, Patrizio, Ghirri, Paolo, Tomasini, Barbara, Mittal, Anita, Kefas, Jonathan, Kamalanathan, Anand, Grosdenier, Michael, Dewhurst, Christopher, Bontea, Andreea, Webb, Delyth, Garr, Ross, Hassan, Ahmed, Ambadkar, Priyadarshan, Dyke, Mark, McDevitt, Katharine, Rewitzky, Glynis, D'Amore, Angela, Kamath, P., Settle, Paul, Maddock, Natasha, Edi-Osagie, Ngozi, Zipitis, Christos, Heal, Carrie, Birch, Jacqeline, Hasib, Abdul, Soe, Aung, Abdul-Malik, Bushra, Kisat, Hamudi, Vasu, Vimal, Sivashankar, Savi, Gupta, Richa, Rawlingson, Chris, Wickham, Tim, Theron, Marice, Kendall, Giles, Gupta, Aashish, Aladangady, Narendra, Ali, Imdad, Jain, Neeraj, Mannan, Khalid, Murthy, Vadivelam, Sullivan, Caroline, Chuang, Shu-Ling, Bate, Tristan, Tyszcuzk, Lidia, Lee, Geraint, Obi, Ozioma, Chang, John, Pai, Vinay, Huddy, Charlotte, Yasin, Salim, Nicholl, Richard, Pandey, Poornima, Cusack, Jonathan, Kairamkonda, Venkatesh, Muogbo, Dominic, Harry, Liza, Surana, Pinki, Broggio, Penny, Pillay, Tilly, Deshpande, Sanjeev, Mahadevan, Moore, Alison, Bastani, Porus, Garbash, Mehdi, Lal, Mithilesh, Abu-Harb, Majd, Allwood, Alex, Selter, Michael, Munyard, Paul, Bartle, David, Paul, Siba, Whincup, Graham, Rekha, Sanghavi, Amess, Philip, Obi, Ben, Reynolds, Peter, Misra, Indranil, De Halpert, Peter, Salgia, Sanjay, Sanghavi, Rekha, Paul, Nicola, Deketelaere, Abby, Khashu, Minesh, Johnson, Mark, Groves, Charlotte, Baird, Jim, Brennan, Nick, Vamvakiti, Katia, McIntyre, John, Holman, Jennifer, Jones, Stephen, Pike, Alison, Cairns, Pamela, Eaton, Megan, Schwarz, Karin, Gibson, David, Miall, Lawrence, Krishnamurthy, Dr, Narayanan, Sankara, Seaton, Sarah E., Draper, Elizabeth S., Kusuda, Satoshi, Håkansson, Stellan, Helenius, Kjell, Reichman, Brian, Vento, Maximo, Darlow, Brian A., Rusconi, Franca, Isayama, Tetsuya, Norman, Mikael, Yang, Junmin, and Modi, Neena

Published
2021
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18. Neonatal Intensive Care Unit-Level Patent Ductus Arteriosus Treatment Rates and Outcomes in Infants Born Extremely Preterm

Author

Harrison, Adele, Synnes, Anne, Ting, Joseph, Cieslak, Zenon, Sherlock, Rebecca, Yee, Wendy, Aziz, Khalid, Toye, Jennifer, Fajardo, Carlos, Kalapesi, Zarin, Sankaran, Koravangattu, Daspal, Sibasis, Seshia, Mary, Alvaro, Ruben, Mukerji, Amit, Da Silva, Orlando, Nwaesei, Chuks, Lee, Kyong-Soon, Dunn, Michael, Lemyre, Brigitte, Dow, Kimberly, Pelausa, Ermelinda, Barrington, Keith, Drolet, Christine, Piedboeuf, Bruno, Claveau, Martine, Beltempo, Marc, Bertelle, Valerie, Masse, Edith, Canning, Roderick, Makary, Hala, Ojah, Cecil, Monterrosa, Luis, Deshpandey, Akhil, Afifi, Jehier, Kajetanowicz, Andrzej, Andersson, Sture, Tammela, Outi, Sankilampi, Ulla, Saarela, Timo, Heymann, Eli, Zangen, Shmuel, Smolkin, Tatyana, Mimouni, Francis, Bader, David, Rothschild, Avi, Strauss, Zipora, Felszer, Clari, Omari, Hussam, Tov-Friedman, Smadar Even, Bar-Oz, Benjamin, Feldman, Michael, Saad, Nizar, Flidel-Rimon, Orna, Weisbrod, Meir, Lubin, Daniel, Litmanovitz, Ita, Kugelman, Amir, Shinwell, Eric, Klinger, Gil, Nijim, Yousif, Bin-Nun, Alona, Golan, Agneta, Mandel, Dror, Fleisher-Sheffer, Vered, Kohelet, David, Bakhrakh, Lev, Hattori, Satoshi, Shirai, Masaru, Ishioka, Toru, Mori, Toshihiko, Amizuka, Takasuke, Huchimukai, Toru, Yoshida, Hiroshi, Sasaki, Ayako, Shimizu, Junichi, Nakamura, Toshihiko, Maruyama, Mami, Matsumoto, Hiroshi, Hosokawa, Shinichi, Taki, Atsuko, Nakagawa, Machiko, Ko, Kyone, Uozumi, Azusa, Nakata, Setsuko, Shimazaki, Akira, Yoda, Tatsuya, Numata, Osamu, Imamura, Hiroaki, Kobayashi, Azusa, Tokuriki, Shuko, Uchida, Yasushi, Arai, Takahiro, Ito, Mitsuhiro, Ieda, Kuniko, Ono, Toshiyuki, Hayashi, Masashi, Maki, Kanemasa, Yamakawa, Mie- Toru, Kawai, Masahiko, Fujii, Noriko, Shiomi, Kozue, Nozaki, Koji, Wada, Hiroshi, Kim, Taho, Tokunaga, Yasuyuki, Takatera, Akihiro, Oshima, Toshio, Sumida, Hiroshi, Michinomae, Yae, Kusumoto, Yoshio, Yoshimoto, Seiji, Morisawa, Takeshi, Ohashi, Tamaki, Takahashi, Yukihiro, Sugimoto, Moriharu, Ono, Noriaki, Miyagawa, Shinichiro, Saijo, Takahiko, Yamagami, Takashi, Koyano, Kosuke, Kobayashi, Shoko, Kanda, Takeshi, Sakemi, Yoshihiro, Aoki, Mikio, Iida, Koichi, Goshi, Mitsushi, Maruyama, Yuko, Kofron, Jiri, Brodd, Katarina Strand, Odlind, Andreas, Alberg, Lars, Arwehed, Sofia, Hafström, Ola, Kasemo, Anna, Nederman, Karin, Åhman, Lars, Ingemarsson, Fredrik, Petersson, Henrik, Thurn, Pernilla, Albinsson, Eva, Selander, Bo, Abrahamsson, Thomas, Heimdahl, Ingela, Sveinsdottir, Kristbjorg, Wejryd, Erik, Hedlund, Anna, Söderberg, Maria Katarina, Navér, Lars, Brune, Thomas, Bäckström, Jens, Robinson, Johan, Farooqi, Aijaz, Normann, Erik, Fredriksson, Magnus, Palm, Anders, Rosenqvist, Urban, Walde, Bengt, Hagman, Cecilia, Ohlin, Andreas, Florell, Rein, Löfvenberg, Agneta Smedsaas, Meyer, Philipp, Kusche, Rachel, Schulzke, Sven, Nelle, Mathias, Wagner, Bendicht, Riedel, Thomas, Kaczala, Grégoire, Pfister, Riccardo E., Tolsa, Jean-François, Roth, Matthias, Stocker, Martin, Laubscher, Bernhard, Malzacher, Andreas, Micallef, John P., Hegi, Lukas, Arlettaz, Romaine, Bernet, Vera, Isayama, Tetsuya, Kusuda, Satoshi, Reichman, Brian, Lee, Shoo K., Lehtonen, Liisa, Norman, Mikael, Adams, Mark, Bassler, Dirk, Helenius, Kjell, Hakansson, Stellan, Yang, Junmin, Jain, Amish, and Shah, Prakesh S.

Published
2020
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19. Efficacy and safety of 5 mg olanzapine combined with aprepitant, granisetron and dexamethasone to prevent carboplatin-induced nausea and vomiting in patients with gynecologic cancer: A multi-institution phase II study

Author

Iihara, Hirotoshi, Shimokawa, Mototsugu, Hayasaki, Yoh, Fujita, Yukiyoshi, Abe, Masakazu, Takenaka, Motoki, Yamamoto, Senri, Arai, Takahiro, Sakurai, Michiru, Mori, Minako, Nakamura, Kazuto, Kado, Nobuhiro, Murase, Saki, Shimaoka, Ryuichi, Suzuki, Akio, and Morishige, Ken-ichirou

Published
2020
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24. Reeb orbits trapped by Denjoy minimal sets

Author

Arai, Takahiro, Inaba, Takashi, and Kano, Yosuke

Subjects
Mathematics - Symplectic Geometry, Mathematics - Dynamical Systems, 37C27, 53D10, 57R30
Abstract

Let $\varphi$ be any flow on $T^n$ obtained as the suspension of a diffeomorphism of $T^{n-1}$ and let $\mathcal A$ be any compact invariant set of $\varphi$. We realize $(\mathcal A, \varphi|_{\mathcal A})$ up to reparametrization as an invariant set of the Reeb flow of a contact form on $\mathbb R^{2n+1}$ equal to the standard contact form outside a compact set and defining the standard contact structure on all of $\mathbb R^{2n+1}$. This generalizes the construction of Geiges, R\"ottgen and Zehmisch., Comment: 7 pages. Two coauthors newly joined. Construction of the function improved

Published
2014

37. A double-blind randomized phase II dose-finding study of olanzapine 10 mg or 5 mg for the prophylaxis of emesis induced by highly emetogenic cisplatin-based chemotherapy

Author

Yanai, Takako, Iwasa, Satoru, Hashimoto, Hironobu, Ohyanagi, Fumiyoshi, Takiguchi, Tomomi, Takeda, Koji, Nakao, Masahiko, Sakai, Hiroshi, Nakayama, Toshiaki, Minato, Koichi, Arai, Takahiro, Suzuki, Kenichi, Shimada, Yasuhiro, Nagashima, Kengo, Terakado, Hiroyuki, and Yamamoto, Noboru

Published
2018
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39. Hereditary Pancreatitis Model by Blastocyst Complementation in Mouse

Author

Asai, Ayumu, Konno, Masamitsu, Kawamoto, Koichi, Isotani, Ayako, Mori, Masaki, Eguchi, Hidetoshi, Doki, Yuichiro, Arai, Takahiro, Ishii, Hideshi, Asai, Ayumu, Konno, Masamitsu, Kawamoto, Koichi, Isotani, Ayako, Mori, Masaki, Eguchi, Hidetoshi, Doki, Yuichiro, Arai, Takahiro, and Ishii, Hideshi

Abstract

The application of pluripotent stem cells is expected to contribute to the elucidation of unknown mechanism of human diseases. However, in vitro induction of organ-specific cells, such as pancreas and liver, is still difficult and the reproduction of their disorders in a model has been unfeasible. To study the mechanism of human hereditary pancreatitis (HP), we here performed the blastocyst complementation (BC) method. In the BC method, mouse embryonic stem (ES) cells harboring CRISPR/CAS9-mediated mutations in the Prss1 gene were injected into blastocysts with deficient Pdx1 gene, which is a critical transcription factor in the development of pancreas. The results showed that trypsin was activated extremely in Prss1-mutant mice. This implied that the mouse phenotype mimics that of human HP and that the BC method was useful for the reproduction and study of pancreatic disorders. The present study opens the possibility of investigating uncharacterized human diseases by utilizing the BC method.

Published
2023

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