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Kamiya Y, Kishida T. Effect of Drinking Water and Sanitation on Child Undernutrition and Diarrhea in Lao PDR. Asia Pac J Public Health 2023; 35:494-501. [PMID: 37837291 DOI: 10.1177/10105395231204797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2023]
Abstract
Childhood undernutrition and diarrhea remain a global health burden in the 21st century. We assessed the effect of access to basic drinking water and sanitation at home on reducing children's likelihood of being undernourished and experiencing diarrhea in Laos. We pooled two rounds of nationally representative cross-sectional household surveys: the Lao Social Indicator Surveys 2011/2012 and 2017, encompassing 23 070 children aged <5 years. We employed multivariate multilevel logistic regression for the analysis. The results showed that access to basic drinking water was associated with a reduced likelihood of undernutrition and was effective in improving child undernutrition. Moreover, access to basic sanitation reduced diarrhea in addition to undernutrition. Notably, sanitation facilities only mitigated childhood stunting and diarrhea when basic drinking water facilities were present in the household. We also confirmed that socio-economic disparities existed among children accessing basic drinking water and sanitation. Consequently, further efforts are needed toward equitable access to these facilities in Laos.
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Affiliation(s)
- Yusuke Kamiya
- Faculty of Economics, Ryukoku University, Kyoto, Japan
| | - Takaaki Kishida
- Department of Economics, University of Lausanne, Lausanne, Switzerland
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Acharya S, Adamová D, Adler A, Adolfsson J, Aglieri Rinella G, Agnello M, Agrawal N, Ahammed Z, Ahmad S, Ahn S, Ahuja I, Akbar Z, Akindinov A, Al-Turany M, Alam S, Aleksandrov D, Alessandro B, Alfanda H, Alfaro Molina R, Ali B, Ali Y, Alici A, Alizadehvandchali N, Alkin A, Alme J, Alocco G, Alt T, Altsybeev I, Anaam M, Andrei C, Andreou D, Andronic A, Anguelov V, Antinori F, Antonioli P, Anuj C, Apadula N, Aphecetche L, Appelshäuser H, Arcelli S, Arnaldi R, Arsene I, Arslandok M, Augustinus A, Averbeck R, Aziz S, Azmi M, Badalà A, Baek Y, Bai X, Bailhache R, Bailung Y, Bala R, Balbino A, Baldisseri A, Balis B, Banerjee D, Banoo Z, Barbera R, Barioglio L, Barlou M, Barnaföldi G, Barnby L, Barret V, Bartels C, Barth K, Bartsch E, Baruffaldi F, Bastid N, Basu S, Batigne G, Battistini D, Batyunya B, Bauri D, Bazo Alba J, Bearden I, Beattie C, Becht P, Belikov I, Bell Hechavarria A, Bellini F, Bellwied R, Belokurova S, Belyaev V, Bencedi G, Beole S, Bercuci A, Berdnikov Y, Berdnikova A, Bergmann L, Besoiu M, Betev L, Bhaduri P, Bhasin A, Bhat I, Bhat M, Bhattacharjee B, Bhattacharya P, Bianchi L, Bianchi N, Yamaguchi Y, Yamakawa K, Yang S, Yano S, Yin Z, Yoo IK, Yoon J, Yuan S, Yuncu A, Zaccolo V, Bielčík J, Zampolli C, Zanoli H, Zanone F, Zardoshti N, Zarochentsev A, Závada P, Zaviyalov N, Zhalov M, Zhang B, Zhang S, Bielčíková J, Zhang X, Zhang Y, Zherebchevskii V, Zhi Y, Zhigareva N, Zhou D, Zhou Y, Zhu J, Zhu Y, Zinovjev G, Biernat J, Zurlo N, Bilandzic A, Biro G, Biswas S, Blair J, Blau D, Blidaru M, Blume C, Boca G, Bock F, Bogdanov A, Boi S, Bok J, Boldizsár L, Bolozdynya A, Bombara M, Bond P, Bonomi G, Borel H, Borissov A, Bossi H, Botta E, Bratrud L, Braun-Munzinger P, Bregant M, Broz M, Bruno G, Buckland M, Budnikov D, Buesching H, Bufalino S, Bugnon O, Buhler P, Buthelezi Z, Butt J, Bylinkin A, Bysiak S, Cai M, Caines H, Caliva A, Calvo Villar E, Camacho J, Camacho R, Camerini P, Canedo F, Carabas M, Carnesecchi F, Caron R, Castillo Castellanos J, Casula E, Catalano F, Ceballos Sanchez C, Chakaberia I, Chakraborty P, Chandra S, Chapeland S, Chartier M, Chattopadhyay S, Chattopadhyay S, Chavez T, Cheng T, Cheshkov C, Cheynis B, Chibante Barroso V, Chinellato D, Cho S, Chochula P, Christakoglou P, Christensen C, Christiansen P, Chujo T, Cicalo C, Cifarelli L, Cindolo F, Ciupek M, Clai G, Cleymans J, Colamaria F, Colburn J, Colella D, Collu A, Colocci M, Concas M, Conesa Balbastre G, Conesa del Valle Z, Contin G, Contreras J, Coquet M, Cormier T, Cortese P, Cosentino M, Costa F, Costanza S, Crochet P, Cruz-Torres R, Cuautle E, Cui P, Cunqueiro L, Dainese A, Danisch M, Danu A, Das P, Das P, Das S, Dash S, De Caro A, de Cataldo G, De Cilladi L, de Cuveland J, De Falco A, De Gruttola D, De Marco N, De Martin C, De Pasquale S, Deb S, Degenhardt H, Deja K, Del Grande R, Dello Stritto L, Deng W, Dhankher P, Di Bari D, Di Mauro A, Diaz R, Dietel T, Ding Y, Divià R, Dixit D, Djuvsland Ø, Dmitrieva U, Do J, Dobrin A, Dönigus B, Dubey A, Dubla A, Dudi S, Dupieux P, Durkac M, Dzalaiova N, Eder T, Ehlers R, Eikeland V, Eisenhut F, Elia D, Erazmus B, Ercolessi F, Erhardt F, Erokhin A, Ersdal M, Espagnon B, Eulisse G, Evans D, Evdokimov S, Fabbietti L, Faggin M, Faivre J, Fan F, Fan W, Fantoni A, Fasel M, Fecchio P, Feliciello A, Feofilov G, Fernández Téllez A, Ferrero A, Ferretti A, Feuillard V, Figiel J, Filova V, Finogeev D, Fionda F, Fiorenza G, Flor F, Flores A, Foertsch S, Fokin S, Fragiacomo E, Frajna E, Francisco A, Fuchs U, Funicello N, Furget C, Furs A, Gaardhøje J, Gagliardi M, Gago A, Gal A, Galvan C, Ganoti P, Garabatos C, Garcia J, Garcia-Solis E, Garg K, Gargiulo C, Garibli A, Garner K, Gasik P, Gauger E, Gautam A, Gay Ducati M, Germain M, Ghosh S, Giacalone M, Gianotti P, Giubellino P, Giubilato P, Glaenzer A, Glässel P, Glimos E, Goh D, Gonzalez V, González-Trueba L, Gorbunov S, Gorgon M, Görlich L, Gotovac S, Grabski V, Graczykowski L, Greiner L, Grelli A, Grigoras C, Grigoriev V, Grigoryan S, Grosa F, Grosse-Oetringhaus J, Grosso R, Grund D, Guardiano G, Guernane R, Guilbaud M, Gulbrandsen K, Gunji T, Guo W, Gupta A, Gupta R, Guzman S, Gyulai L, Habib M, Hadjidakis C, Haidenbauer J, Hamagaki H, Hamid M, Hannigan R, Haque M, Harlenderova A, Harris J, Harton A, Hasenbichler J, Hassan H, Hatzifotiadou D, Hauer P, Havener L, Heckel S, Hellbär E, Helstrup H, Herman T, Herrera Corral G, Herrmann F, Hetland K, Heybeck B, Hillemanns H, Hills C, Hippolyte B, Hofman B, Hohlweger B, Honermann J, Hong G, Horak D, Hornung S, Horzyk A, Hosokawa R, Hou Y, Hristov P, Hughes C, Huhn P, Huhta L, Hulse C, Humanic T, Hushnud H, Husova L, Hutson A, Hyodo T, Iddon J, Ilkaev R, Ilyas H, Inaba M, Innocenti G, Ippolitov M, Isakov A, Isidori T, Islam M, Ivanov M, Ivanov V, Izucheev V, Jablonski M, Jacak B, Jacazio N, Jacobs P, Jadlovska S, Jadlovsky J, Jaelani S, Jahnke C, Jakubowska M, Jalotra A, Janik M, Janson T, Jercic M, Jevons O, Jimenez A, Jonas F, Jones P, Jowett J, Jung J, Jung M, Junique A, Jusko A, Kabus M, Kaewjai J, Kalinak P, Kalteyer A, Kalweit A, Kamiya Y, Kaplin V, Karasu Uysal A, Karatovic D, Karavichev O, Karavicheva T, Karczmarczyk P, Karpechev E, Kashyap V, Kazantsev A, Kebschull U, Keidel R, Keijdener D, Keil M, Ketzer B, Khan A, Khan S, Khanzadeev A, Kharlov Y, Khatun A, Khuntia A, Kileng B, Kim B, Kim C, Kim D, Kim E, Kim J, Kim J, Kim J, Kim J, Kim M, Kim S, Kim T, Kirsch S, Kisel I, Kiselev S, Kisiel A, Kitowski J, Klay J, Klein J, Klein S, Klein-Bösing C, Kleiner M, Klemenz T, Kluge A, Knospe A, Kobdaj C, Kollegger T, Kondratyev A, Kondratyeva N, Kondratyuk E, Konig J, Konigstorfer S, Konopka P, Kornakov G, Koryciak S, Kotliarov A, Kovalenko O, Kovalenko V, Kowalski M, Králik I, Kravčáková A, Kreis L, Krivda M, Krizek F, Krizkova Gajdosova K, Kroesen M, Krüger M, Krupova D, Kryshen E, Krzewicki M, Kučera V, Kuhn C, Kuijer P, Kumaoka T, Kumar D, Kumar L, Kumar N, Kundu S, Kurashvili P, Kurepin A, Kurepin A, Kuryakin A, Kushpil S, Kvapil J, Kweon M, Kwon J, Kwon Y, La Pointe S, La Rocca P, Lai Y, Lakrathok A, Lamanna M, Langoy R, Larionov P, Laudi E, Lautner L, Lavicka R, Lazareva T, Lea R, Lehrbach J, Lemmon R, León Monzón I, Lesch M, Lesser E, Lettrich M, Lévai P, Li X, Li X, Lien J, Lietava R, Lim B, Lim S, Lindenstruth V, Lindner A, Lippmann C, Liu A, Liu D, Liu J, Lofnes I, Loginov V, Loizides C, Loncar P, Lopez J, Lopez X, López Torres E, Luhder J, Lunardon M, Luparello G, Ma Y, Maevskaya A, Mager M, Mahmoud T, Maire A, Malaev M, Malik N, Malik Q, Malik S, Malinina L, Mal’Kevich D, Mallick D, Mallick N, Mandaglio G, Manko V, Manso F, Manzari V, Mao Y, Margagliotti G, Margotti A, Marín A, Markert C, Marquard M, Martin N, Martinengo P, Martinez J, Martínez M, Martínez García G, Masciocchi S, Masera M, Masoni A, Massacrier L, Mastroserio A, Mathis A, Matonoha O, Matuoka P, Matyja A, Mayer C, Mazuecos A, Mazzaschi F, Mazzilli M, Mdhluli J, Mechler A, Melikyan Y, Menchaca-Rocha A, Meninno E, Menon A, Meres M, Mhlanga S, Miake Y, Micheletti L, Migliorin L, Mihaylov D, Mikhaylov K, Mishra A, Miśkowiec D, Modak A, Mohanty A, Mohanty B, Mohisin Khan M, Molander M, Moravcova Z, Mordasini C, Moreira De Godoy D, Morozov I, Morsch A, Mrnjavac T, Muccifora V, Mudnic E, Mühlheim D, Muhuri S, Mulligan J, Mulliri A, Munhoz M, Munzer R, Murakami H, Murray S, Musa L, Musinsky J, Myrcha J, Naik B, Nair R, Nandi B, Nania R, Nappi E, Nassirpour A, Nath A, Nattrass C, Neagu A, Negru A, Nellen L, Nesbo S, Neskovic G, Nesterov D, Nielsen B, Nielsen E, Nikolaev S, Nikulin S, Nikulin V, Noferini F, Noh S, Nomokonov P, Norman J, Novitzky N, Nowakowski P, Nyanin A, Nystrand J, Ogino M, Ohlson A, Ohnishi A, Okorokov V, Oleniacz J, Oliveira Da Silva A, Oliver M, Onnerstad A, Oppedisano C, Ortiz Velasquez A, Osako T, Oskarsson A, Otwinowski J, Oya M, Oyama K, Pachmayer Y, Padhan S, Pagano D, Paić G, Palasciano A, Panebianco S, Park J, Parkkila J, Pathak S, Patra R, Paul B, Pei H, Peitzmann T, Peng X, Pereira L, Pereira Da Costa H, Peresunko D, Perez G, Perrin S, Pestov Y, Petráček V, Petrov V, Petrovici M, Pezzi R, Piano S, Pikna M, Pillot P, Pinazza O, Pinsky L, Pinto C, Pisano S, Płoskoń M, Planinic M, Pliquett F, Poghosyan M, Polichtchouk B, Politano S, Poljak N, Pop A, Porteboeuf-Houssais S, Porter J, Pozdniakov V, Prasad S, Preghenella R, Prino F, Pruneau C, Pshenichnov I, Puccio M, Qiu S, Quaglia L, Quishpe R, Ragoni S, Rakotozafindrabe A, Ramello L, Rami F, Ramirez S, Rancien T, Raniwala R, Raniwala S, Räsänen S, Rath R, Ravasenga I, Read K, Redelbach A, Redlich K, Rehman A, Reichelt P, Reidt F, Reme-ness H, Rescakova Z, Reygers K, Riabov A, Riabov V, Richert T, Richter M, Riegler W, Riggi F, Ristea C, Rodríguez Cahuantzi M, Røed K, Rogalev R, Rogochaya E, Rogoschinski T, Rohr D, Röhrich D, Rojas P, Rojas Torres S, Rokita P, Ronchetti F, Rosano A, Rosas E, Rossi A, Roy A, Roy P, Roy S, Rubini N, Rueda O, Ruggiano D, Rui R, Rumyantsev B, Russek P, Russo R, Rustamov A, Ryabinkin E, Ryabov Y, Rybicki A, Rytkonen H, Rzesa W, Saarimaki O, Sadek R, Sadovsky S, Saetre J, Šafařík K, Saha S, Saha S, Sahoo B, Sahoo P, Sahoo R, Sahoo S, Sahu D, Sahu P, Saini J, Sakai S, Salvan M, Sambyal S, Saramela T, Sarkar D, Sarkar N, Sarma P, Sarti V, Sas M, Schambach J, Scheid H, Schiaua C, Schicker R, Schmah A, Schmidt C, Schmidt H, Schmidt M, Schmidt M, Schmidt N, Schmier A, Schotter R, Schukraft J, Schwarz K, Schweda K, Scioli G, Scomparin E, Seger J, Sekiguchi Y, Sekihata D, Selyuzhenkov I, Senyukov S, Seo J, Serebryakov D, Šerkšnytė L, Sevcenco A, Shaba T, Shabanov A, Shabetai A, Shahoyan R, Shaikh W, Shangaraev A, Sharma A, Sharma D, Sharma H, Sharma M, Sharma N, Sharma S, Sharma U, Shatat A, Sheibani O, Shigaki K, Shimomura M, Shirinkin S, Shou Q, Sibiriak Y, Siddhanta S, Siemiarczuk T, Silva T, Silvermyr D, Simantathammakul T, Simonetti G, Singh B, Singh R, Singh R, Singh R, Singh V, Singhal V, Sinha T, Sitar B, Sitta M, Skaali T, Skorodumovs G, Slupecki M, Smirnov N, Snellings R, Soncco C, Song J, Songmoolnak A, Soramel F, Sorensen S, Sputowska I, Stachel J, Stan I, Steffanic P, Stiefelmaier S, Stocco D, Storehaug I, Storetvedt M, Stratmann P, Strazzi S, Stylianidis C, Suaide A, Suire C, Sukhanov M, Suljic M, Sultanov R, Sumberia V, Sumowidagdo S, Swain S, Szabo A, Szarka I, Tabassam U, Taghavi S, Taillepied G, Takahashi J, Tambave G, Tang S, Tang Z, Tapia Takaki J, Tapus N, Tarzila M, Tauro A, Tejeda Muñoz G, Telesca A, Terlizzi L, Terrevoli C, Tersimonov G, Thakur S, Thomas D, Tieulent R, Tikhonov A, Timmins A, Tkacik M, Toia A, Topilskaya N, Toppi M, Torales-Acosta F, Tork T, Torres Ramos A, Trifiró A, Triolo A, Tripathy S, Tripathy T, Trogolo S, Trubnikov V, Trzaska W, Trzcinski T, Tumkin A, Turrisi R, Tveter T, Ullaland K, Uras A, Urioni M, Usai G, Vala M, Valle N, Vallero S, van Doremalen L, van Leeuwen M, Vande Vyvre P, Varga D, Varga Z, Varga-Kofarago M, Vasileiou M, Vasiliev A, Vázquez Doce O, Vechernin V, Velure A, Vercellin E, Vergara Limón S, Vermunt L, Vértesi R, Verweij M, Vickovic L, Vilakazi Z, Villalobos Baillie O, Vino G, Vinogradov A, Virgili T, Vislavicius V, Vodopyanov A, Volkel B, Völkl M, Voloshin K, Voloshin S, Volpe G, von Haller B, Vorobyev I, Vozniuk N, Vrláková J, Wagner B, Wang C, Wang D, Weber M, Weelden R, Wegrzynek A, Wenzel S, Wessels J, Weyhmiller S, Wiechula J, Wikne J, Wilk G, Wilkinson J, Willems G, Windelband B, Winn M, Witt W, Wright J, Wu W, Wu Y, Xu R, Yadav A, Yalcin S. First study of the two-body scattering involving charm hadrons. Int J Clin Exp Med 2022. [DOI: 10.1103/physrevd.106.052010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Kamiya Y, Handa K, Miura T, Ohori J, Shimizu M, Kitajima M, Shono F, Funatsu K, Yamazaki H. Correction to "An Updated In Silico Prediction Method for Volumes of Systemic Circulation of 323 Disparate Chemicals for Use in Physiologically Based Pharmacokinetic Models to Estimate Plasma and Tissue Concentrations after Oral Doses in Rats". Chem Res Toxicol 2022; 35:1433. [PMID: 35905009 DOI: 10.1021/acs.chemrestox.2c00225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ogiya D, Murayama N, Kamiya Y, Saito R, Shiraiwa S, Suzuki R, Machida S, Tazume K, Ando K, Yamazaki H. Low cerebrospinal fluid-to-plasma ratios of orally administered lenalidomide mediated by its low cell membrane permeability in patients with hematologic malignancies. Ann Hematol 2022; 101:2013-2019. [PMID: 35732975 DOI: 10.1007/s00277-022-04893-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 06/13/2022] [Indexed: 11/01/2022]
Abstract
Lenalidomide is a synthetic analog of thalidomide formed by the removal of one keto group (plus the addition of an amino group); it has anti-tumor activities beneficial for the treatment of hematologic malignancies. However, lenalidomide distribution to brain in animal models is reportedly low compared with that of thalidomide. The aim of this study was to evaluate plasma and cerebrospinal fluid concentrations of lenalidomide in three patients with malignant hematologic malignancies. Lenalidomide was detected in plasma from the three Japanese patients 1.5 h following oral administration of 20 mg lenalidomide using liquid chromatography/mass spectrometry, despite the in vitro gastrointestinal permeability of lenalidomide being low. Clinically observed cerebrospinal fluid-to-plasma ratios of lenalidomide were low (1.3-2.4%). Observed influx permeability values for lenalidomide in monkey blood-brain barrier model and human placental cell systems were one order of magnitude lower than those of thalidomide and another second-generation drug, pomalidomide along with a positive permeability control, caffeine. Because of the low cell-barrier permeability of lenalidomide demonstrated in in vitro assays, clinically relevant pharmacokinetic profiles of lenalidomide resulted in low penetrability from plasma into cerebrospinal fluid in patients with hematologic malignancies. Lenalidomide is conclusively suggested to expert its favorable immunomodulatory effects via systemic exposures in the patients.
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Affiliation(s)
- Daisuke Ogiya
- Department of Hematology and Oncology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan.,Department of Hematology, Isehara Kyodo Hospital, 345 Tanaka, Isehara, Kanagawa, 259-1187, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Rie Saito
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Sawako Shiraiwa
- Department of Hematology and Oncology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan
| | - Rikio Suzuki
- Department of Hematology and Oncology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan
| | - Shinichiro Machida
- Department of Hematology and Oncology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan
| | - Kei Tazume
- Department of Hematology, Isehara Kyodo Hospital, 345 Tanaka, Isehara, Kanagawa, 259-1187, Japan
| | - Kiyoshi Ando
- Department of Hematology and Oncology, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan.
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Tanou M, Kishida T, Kamiya Y. The Effects of Precipitation and Temperature on Birth Weight: A Cross-Sectional Study from the Republic of Benin. Glob J Health Sci 2022. [DOI: 10.5539/gjhs.v14n7p19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Climate change, particularly changes in temperature and precipitation, prevents the improvement of maternal and neonatal health (MNH) in low-and middle-income countries (LMICs). Pregnant women and newborns in LMICs are considered the most vulnerable to adverse climate conditions, including extreme heat, floods, and droughts. This study examined the effects of precipitation and temperature on birth weight in the Republic of Benin, emphasizing climatic differences between the southern and northern regions. As a cross-sectional study, we pooled four rounds of Benin Demographic and Health Survey (BDHS) data, identifying 19 646 live births. We investigated the effects of precipitation and temperature on birth weight and the likelihood of low birth weight (LBW) newborns using multivariate multilevel linear and logistic regression models. We found that the average precipitation amount during the nine months before birth was positively correlated with higher birth weight in the south and was associated with a lower likelihood of LBW in the north. During the nine months before birth, a heat wave reduced birth weight by 57.0 g in the north. Furthermore, women and newborns in the north were more susceptible to precipitation and temperature, possibly due to food insecurity. Evaluating the MNH consequences of climate change is imperative for many developing countries facing severe climate change threats. Our findings provide an essential benchmark for future policies in Benin.
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Shimizu M, Hayasaka R, Kamiya Y, Yamazaki H. Trivariate Linear Regression and Machine Learning Prediction of Possible Roles of Efflux Transporters in Estimated Intestinal Permeability Values of 301 Disparate Chemicals. Biol Pharm Bull 2022; 45:1142-1157. [DOI: 10.1248/bpb.b22-00221] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Kamiya Y, Miura T, Kato A, Murayama N, Shimizu M, Yamazaki H. Plasma concentration profiles for hepatotoxic pyrrolizidine alkaloid senkirkine in humans extrapolated from rat data sets using a simplified physiologically based pharmacokinetic model. Drug Metab Lett 2021; 15:64-69. [PMID: 34931973 DOI: 10.2174/1872312801666211220110055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 11/27/2021] [Accepted: 12/06/2021] [Indexed: 11/22/2022]
Abstract
AIM The main aim of the current study was to obtain forward dosimetry assessments of pyrrolizidine alkaloid senkirkine plasma and liver concentrations by setting up a human physiologically based pharmacokinetic (PBPK) model based on the limited information available. BACKGROUND The risks associated with plant-derived pyrrolizidine alkaloids as natural toxins have been assessed. OBJECTIVE The pyrrolizidine alkaloid senkirkine was investigated because it was analyzed in a European transcriptomics study of natural hepatotoxins and in a study of the alkaloidal constituents of traditional Japanese food plants Petasites japonicus. The in silico human plasma and liver concentrations of senkirkine were modeled using doses reported for acute-term toxicity in humans. METHODS Using a simplified PBPK model established using rat pharmacokinetic data, forward dosimetry was conducted. Since in vitro rat and human intrinsic hepatic clearances were similar; an allometric scaling approach was applied to rat parameters to create a human PBPK model. RESULTS After oral administration of 1.0 mg/kg in rats in vivo, water-soluble senkirkine was absorbed and cleared from plasma to two orders of magnitude below the maximum concentration in 8 h. Human in silico senkirkine plasma concentration curves were generated after virtual daily oral administrations of 3.0 mg/kg senkirkine (the dose involved in an acute fatal hepatotoxicity case). A high concentration of senkirkine in the culture medium caused in vitro hepatotoxicity as evidenced by lactate dehydrogenase leakage from human hepatocyte-like HepaRG cells. CONCLUSION Higher virtual concentrations of senkirkine in human liver and plasma than those in rat plasma were estimated using the current rat and human PBPK models. Current simulations suggest that if P. japonicus (a water-soluble pyrrolizidine alkaloid-producing plant) is ingested daily as food, hepatotoxic senkirkine could be continuously present in human plasma and liver.
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Affiliation(s)
- Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Airi Kato
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
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Kamiya Y, Handa K, Miura T, Ohori J, Kato A, Shimizu M, Kitajima M, Yamazaki H. Machine Learning Prediction of the Three Main Input Parameters of a Simplified Physiologically Based Pharmacokinetic Model Subsequently Used to Generate Time-Dependent Plasma Concentration Data in Humans after Oral Doses of 212 Disparate Chemicals. Biol Pharm Bull 2021; 45:124-128. [PMID: 34732590 DOI: 10.1248/bpb.b21-00769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Physiologically based pharmacokinetic (PBPK) modeling has the potential to play significant roles in estimating internal chemical exposures. The three major PBPK model input parameters (i.e., absorption rate constants, volumes of the systemic circulation, and hepatic intrinsic clearances) were generated in silico for 212 chemicals using machine learning algorithms. These input parameters were calculated based on sets of between 17 and 65 chemical properties that were generated by in silico prediction tools before being processed by machine learning algorithms. The resulting simplified PBPK models were used to estimate plasma concentrations after virtual oral administrations in humans. The estimated absorption rate constants, volumes of the systemic circulation, and hepatic intrinsic clearance values for the 212 test compounds determined traditionally (i.e., based on fitting to measured concentration profiles) and newly estimated had correlation coefficients of 0.65, 0.68, and 0.77 (p < 0.01, n = 212), respectively. When human plasma concentrations were modeled using traditionally determined input parameters and again using in silico estimated input parameters, the two sets of maximum plasma concentrations (r = 0.85, p < 0.01, n = 212) and areas under the curve (r = 0.80, p < 0.01, n = 212) were correlated. Virtual chemical exposure levels in liver and kidney were also estimated using these simplified PBPK models along with human plasma levels. These results indicate that the PBPK model input parameters for humans of a diverse set of compounds can be reliability estimated using chemical descriptors calculated using in silico tools.
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Nakagawa Y, Furusho H, Kamiya Y, Nishikawa R, Miwa K, Yasuda T. A case of torsades de pointes due to takotsubo cardiomyopathy after common atrial flutter ablation. J Cardiol Cases 2021; 25:275-278. [DOI: 10.1016/j.jccase.2021.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 10/14/2021] [Accepted: 11/02/2021] [Indexed: 10/19/2022] Open
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10
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Miura T, Kamiya Y, Murayama N, Shimizu M, Yamazaki H. Differences in Pharmacokinetics and Haematotoxicities of Aniline and Its Dimethyl Derivatives Orally Administered in Rats. Biol Pharm Bull 2021; 44:1775-1780. [PMID: 34433705 DOI: 10.1248/bpb.b21-00589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Aniline and its dimethyl derivatives reportedly become haematotoxic after metabolic N-hydroxylation of their amino groups. The plasma concentrations of aniline and its dimethyl derivatives after single oral doses of 25 mg/kg in rats were quantitatively measured and semi-quantitatively estimated using LC-tandem mass spectrometry. The quantitatively determined elimination rates of aniline; 2,4-dimethylaniline; and 3,5-dimethylaniline based on rat plasma versus time curves were generally rapid compared with those of 2,3-; 2,5-; 2,6-; and N,2-dimethylaniline. The primary acetylated metabolites of aniline; 2,4-dimethylaniline; and 3,5-dimethylaniline, as semi-quantitatively estimated based on their peak areas in LC analyses, were more extensively formed than those of 2,3-; 2,5-; 2,6-; and N,2-dimethylaniline. The areas under the curve of unmetabolized (remaining) aniline and its dimethyl derivatives estimated using simplified physiologically based pharmacokinetic models (that were set up using the experimental plasma concentrations) showed an apparently positive correlation with the reported lowest-observed-effect levels for haematotoxicity of these chemicals. In the case of 2,4-dimethylaniline, a methyl group at another C4-positon would be one of the determinant factors for rapid metabolic elimination to form aminotoluic acid. These results suggest that rapid and extensive metabolic activation of aniline and its dimethyl derivatives occurred in rats and that the presence of a methyl group at the C2-positon may generally suppress fast metabolic rates of dimethyl aniline derivatives that promote metabolic activation reactions at NH2 moieties.
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Affiliation(s)
- Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
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11
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Kamiya Y, Handa K, Miura T, Ohori J, Shimizu M, Kitajima M, Shono F, Funatsu K, Yamazaki H. An Updated In Silico Prediction Method for Volumes of Systemic Circulation of 323 Disparate Chemicals for Use in Physiologically Based Pharmacokinetic Models to Estimate Plasma and Tissue Concentrations after Oral Doses in Rats. Chem Res Toxicol 2021; 34:2180-2183. [PMID: 34586804 DOI: 10.1021/acs.chemrestox.1c00249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Updated algorithms for predicting the volumes of systemic circulation (V1), along with absorption rate constants and hepatic intrinsic clearances, as input parameters for physiologically based pharmacokinetic (PBPK) models were established to improve the accuracy of estimated plasma and tissue concentrations of 323 chemicals after virtual oral administrations in rats. Using ridge regression with an enlarged set of chemical descriptors (up to 99), the estimated input V1 values resulted in an improved correlation coefficient (from 246 compounds) with the traditionally determined values. The PBPK model input parameters for rats of diverse compounds can be precisely estimated by increasing the number of descriptors.
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Affiliation(s)
- Yusuke Kamiya
- Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | | | - Tomonori Miura
- Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Junya Ohori
- Fujitsu, Nakahara-ku, Kawasaki 211-8588, Japan
| | - Makiko Shimizu
- Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | | | - Fumiaki Shono
- Data Science Center Tokyo Office, Nara Institute of Science and Technology, Minato-ku, Tokyo 108-0023, Japan
| | - Kimito Funatsu
- Data Science Center Tokyo Office, Nara Institute of Science and Technology, Minato-ku, Tokyo 108-0023, Japan
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Tanou M, Kishida T, Kamiya Y. The effects of geographical accessibility to health facilities on antenatal care and delivery services utilization in Benin: a cross-sectional study. Reprod Health 2021; 18:205. [PMID: 34649581 PMCID: PMC8518195 DOI: 10.1186/s12978-021-01249-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 09/25/2021] [Indexed: 11/10/2022] Open
Abstract
Background The world is making progress toward achieving maternal and child health (MCH) related components of the Sustainable Development Goals. Nevertheless, the progress of many countries in Sub-Saharan Africa is lagging. Geographical accessibility from residence to health facilities is considered a major obstacle hampering the use of appropriate MCH services. Benin, a country where the southern and northern parts belong to different geographical zones, has among the highest maternal mortality rate in the world. Adequate use of MCH care is important to save lives of women and their babies. This study assessed the effect of geographical accessibility to health facilities on antenatal care and delivery services utilization in Benin, with an emphasis on geographical zones. Methods We pooled two rounds of Benin Demographic and Health Surveys (BDHS). The sample included 18,105 women aged 15–49 years (9111 from BDHS-2011/2012 and 8994 from BDHS-2017/2018) who had live births within five years preceding the surveys. We measured the distance and travel time from residential areas to the closest health center by merging the BDHS datasets with Benin’s geographic information system data. Multivariate logistic regression analysis was performed to estimate the effect of geographical access on pregnancy and delivery services utilization. We conducted a propensity score-matching analysis to check for robustness. Results Regression results showed that the distance to the closest health center had adverse effects on the likelihood of a woman receiving appropriate maternal healthcare. The estimates showed that one km increase in straight-line distance to the closest health center reduces the odds of the woman receiving at least one antenatal care by 0.042, delivering in facility by 0.092, and delivering her baby with assistance of skilled birth attendants by 0.118. We also confirmed the negative effects of travel time and altitude of women’s residence on healthcare utilization. Nonetheless, these effects were mainly seen in the northern part of Benin. Conclusions Geographical accessibility to health facilities is critically important for the utilization of antenatal care and delivery services, particularly in the northern part of Benin. Improving geographical accessibility, especially in rural areas, is significant for further use of maternal health care in Benin. Maternal and neonatal mortality rates are still high in many countries in Sub-Saharan Africa. Antenatal care (ANC) visits and institutional delivery with skilled birth attendants are important to prevent maternal and neonatal deaths. Nevertheless, women’s utilization of ANC and delivery services has decreased recently in Benin, a country where the southern and northern parts belong to different geographical zones. Geographical accessibility from residence to health facilities is considered a major obstacle hampering the use of appropriate maternal healthcare. This study assessed the effect of geographical accessibility on ANC and delivery services utilization in Benin by considering the geographical characteristics. We used the two rounds of the Benin Demographic and Health Survey 2011/2012 and 2017/2018 and conducted regression analysis. This study has three important findings: (1) We confirmed adverse effects of distance and travel time on the likelihood of a women receiving appropriate ANC and delivery services in Benin, but this effect was mainly observed in the northern part; (2) Distance and travel time to health facilities had a negative effect on the use of at least one ANC but no significant effect for four or more ANC; (3) Regarding the threshold of distance, we confirmed that women living within 5 km from the closest health center were more likely to use maternal healthcare compared to their counterparts. In conclusion, geographical accessibility to health facilities is critically important for the utilization of antenatal care and delivery services, particularly in the northern part of Benin.
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Affiliation(s)
- Mariam Tanou
- Ministry of Infrastructure, Building Lamizana, 03BP7011, Ouagadougou, Burkina Faso.
| | - Takaaki Kishida
- Graduate School of International Cooperation Studies, Kobe University, 2-1 Rokkodai, Nada-ku, Kobe, 657-8501, Japan
| | - Yusuke Kamiya
- Faculty of Economics, Ryukoku University, 67 Tsukamoto-cho, Fukakusa, Fushimi-ku, Kyoto, 612-8577, Japan
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Yanagi M, Kamiya Y, Murayama N, Banju K, Shimizu M, Yamazaki H. Metabolic profiles for the pyrrolizidine alkaloid neopetasitenine and its metabolite petasitenine in humans extrapolated from rat in vivo and in vitro data sets using a simplified physiologically based pharmacokinetic model. J Toxicol Sci 2021; 46:391-399. [PMID: 34470991 DOI: 10.2131/jts.46.391] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Naturally occurring food substances may constitute safety hazards. The risks associated with plant-derived pyrrolizidine alkaloids have been extensively evaluated. Petasites japonicus (common Japanese name, fuki) is a widely consumed water-soluble pyrrolizidine alkaloid-producing plant. In this study, neopetasitenine (acetylfukinotoxin) was selected as a model food substrate (for which human pharmacokinetics were estimated) because of its high concentration in fuki, along with petasitenine (fukinotoxin), its carcinogenic deacetylated metabolite. Although neopetasitenine was rapidly absorbed and converted to petasitenine after oral administration of 1.0 mg/kg in rats, petasitenine was slowly cleared from plasma. Forward dosimetry was conducted using in silico simplified physiologically based pharmacokinetic (PBPK) modeling formulated on experimental pharmacokinetic rat data. From ~2 hr after the oral administration of neopetasitenine in rats, the plasma concentrations of petasitenine were higher than those of neopetasitenine under the present conditions. A human PBPK model was established following an allometric scaling approach applied to rat parameters (without considering interspecies factors) to estimate human intrinsic hepatic clearances from empirical rat values. Human in silico neopetasitenine and petasitenine plasma concentration curves were simulated after daily oral administrations of 3.0 and 1.3 mg/kg neopetasitenine. These doses were taken from reported acute/short-term cases of pyrrolizidine alkaloid toxicity. In vitro hepatotoxicity of neopetasitenine and petasitenine was caused by their high concentrations in the medium for human hepatocyte-like cell line HepaRG cells as an index of lactate dehydrogenase leakage. Neopetasitenine was estimated to be rapidly absorbed and converted to deacetylated carcinogenic petasitenine, even after hepatotoxic doses of 1.0 mg/kg in humans. If the water-soluble pyrrolizidine alkaloid-producing plant P. japonicus were daily consumed as food, current simulation results suggest that dangerous amounts of deacetylated petasitenine could be continuously present in human plasma.
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Kamiya Y, Omura A, Hayasaka R, Saito R, Sano I, Handa K, Ohori J, Kitajima M, Shono F, Funatsu K, Yamazaki H. Prediction of permeability across intestinal cell monolayers for 219 disparate chemicals using in vitro experimental coefficients in a pH gradient system and in silico analyses by trivariate linear regressions and machine learning. Biochem Pharmacol 2021; 192:114749. [PMID: 34461115 DOI: 10.1016/j.bcp.2021.114749] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/25/2021] [Accepted: 08/25/2021] [Indexed: 11/25/2022]
Abstract
For medicines, the apparent membrane permeability coefficients (Papp) across human colorectal carcinoma cell line (Caco-2) monolayers under a pH gradient generally correlate with the fraction absorbed after oral intake. Furthermore, the in vitro Papp values of 29 industrial chemicals were found to have an inverse association with their reported no-observed effect levels for hepatotoxicity in rats. In the current study, we expanded our influx permeability predictions for the 90 previously investigated chemicals to both influx and efflux permeability predictions for 207 diverse primary compounds, along with those for 23 secondary compounds. Trivariate linear regression analysis found that the observed influx and efflux logPapp values determined by in vitro experiments significantly correlated with molecular weights and the octanol-water distribution coefficients at apical and basal pH levels (pH 6.0 and 7.4, respectively) (apical to basal, r = 0.76, n = 198; and basal to apical, r = 0.77, n = 202); the distribution coefficients were estimated in silico. Further, prediction accuracy was enhanced by applying a light gradient boosting machine learning system (LightGBM) to estimate influx and efflux logPapp values that incorporated 17 and 19 in silico chemical descriptors (r = 0.83-0.84, p < 0.001). The determination in vitro and/or prediction in silico of permeability coefficients across intestinal cell monolayers of a diverse range of industrial chemicals/food components/medicines could contribute to the safety evaluations of oral intakes of general chemicals in humans. Such new alternative methods could also reduce the need for animal testing during toxicity assessment.
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Affiliation(s)
- Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Asuka Omura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Riku Hayasaka
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Rie Saito
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Izumi Sano
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | | | - Junya Ohori
- Fujitsu, Nakahara-ku, Kawasaki 211-8588, Japan
| | | | - Fumiaki Shono
- Data Science Center Tokyo Office, Nara Institute of Science and Technology, Minato-ku, Tokyo 108-0023, Japan
| | - Kimito Funatsu
- Data Science Center Tokyo Office, Nara Institute of Science and Technology, Minato-ku, Tokyo 108-0023, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan.
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Miura T, Kamiya Y, Uehara S, Murayama N, Shimizu M, Suemizu H, Yamazaki H. Hepatotoxicological potential of P-toluic acid in humanised-liver mice investigated using simplified physiologically based pharmacokinetic models. Xenobiotica 2021; 51:636-642. [PMID: 33781181 DOI: 10.1080/00498254.2021.1908643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
p-Toluic acid, a metabolite of organic solvent xylene, has a high reported no-observed-effect level (NOEL, 1000 mg/kg) in rats, possibly because of direct glycine conjugation to methylhippuric acid. In this study, plasma levels of p-toluic acid and its glycine conjugate in mice and humanised-liver mice were evaluated after oral administrations.Although rapid conversion of p-toluic acid to its glycine conjugate was evident from mouse plasma concentrations, the biotransformation of p-toluic acid was slower in humanised-liver mice. The input parameters for physiologically based pharmacokinetic (PBPK) models were determined using fitting procedures to create PBPK-generated plasma concentration curves.The PBPK-modelled hepatic concentrations of p-toluic acid in humanised-liver mice were higher than those observed in plasma. PBPK-modelled hepatic and plasma concentrations of p-toluic acid also indicated slow elimination in humans.These results suggest that rapid conjugations of p-toluic acid reportedly observed in rats could result in overestimation of NOELs for conjugatable chemicals when extrapolated to humanised-liver mice or humans.
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Affiliation(s)
- Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Japan
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Japan
| | - Shotaro Uehara
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Japan
| | - Hiroshi Suemizu
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Japan
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Kamiya Y, Handa K, Miura T, Yanagi M, Shigeta K, Hina S, Shimizu M, Kitajima M, Shono F, Funatsu K, Yamazaki H. In Silico Prediction of Input Parameters for Simplified Physiologically Based Pharmacokinetic Models for Estimating Plasma, Liver, and Kidney Exposures in Rats after Oral Doses of 246 Disparate Chemicals. Chem Res Toxicol 2021; 34:507-513. [PMID: 33433197 DOI: 10.1021/acs.chemrestox.0c00336] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Recently developed computational models can estimate plasma, hepatic, and renal concentrations of industrial chemicals in rats. Typically, the input parameter values (i.e., the absorption rate constant, volume of systemic circulation, and hepatic intrinsic clearance) for simplified physiologically based pharmacokinetic (PBPK) model systems are calculated to give the best fit to measured or reported in vivo blood substance concentration values in animals. The purpose of the present study was to estimate in silico these three input pharmacokinetic parameters using a machine learning algorithm applied to a broad range of chemical properties obtained from several cheminformatics software tools. These in silico estimated parameters were then incorporated into PBPK models for predicting internal exposures in rats. Following this approach, simplified PBPK models were set up for 246 drugs, food components, and industrial chemicals with a broad range of chemical structures. We had previously generated PBPK models for 158 of these substances, whereas 88 for which concentration series data were available in the literature were newly modeled. The values for the absorption rate constant, volume of systemic circulation, and hepatic intrinsic clearance could be generated in silico by equations containing between 14 and 26 physicochemical properties. After virtual oral dosing, the output concentration values of the 246 compounds in plasma, liver, and kidney from rat PBPK models using traditionally determined and in silico estimated input parameters were well correlated (r ≥ 0.83). In summary, by using PBPK models consisting of chemical receptor (gut), metabolizing (liver), excreting (kidney), and central (main) compartments with in silico-derived input parameters, the forward dosimetry of new chemicals could provide the plasma/tissue concentrations of drugs and chemicals after oral dosing, thereby facilitating estimates of hematotoxic, hepatotoxic, or nephrotoxic potential as a part of risk assessment.
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Affiliation(s)
- Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Kentaro Handa
- Fujitsu Kyusyu Systems, Higashi-hie, Hakata-ku, Fukuoka 812-0007, Japan
| | - Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Mayu Yanagi
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Kazuki Shigeta
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Shiori Hina
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Masato Kitajima
- Fujitsu Kyusyu Systems, Higashi-hie, Hakata-ku, Fukuoka 812-0007, Japan
| | - Fumiaki Shono
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kimito Funatsu
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
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Miura T, Shimizu M, Uehara S, Yoshizawa M, Nakano A, Yanagi M, Kamiya Y, Murayama N, Suemizu H, Yamazaki H. Different Hepatic Concentrations of Bromobenzene, 1,2-Dibromobenzene, and 1,4-Dibromobenzene in Humanized-Liver Mice Predicted Using Simplified Physiologically Based Pharmacokinetic Models as Putative Markers of Toxicological Potential. Chem Res Toxicol 2020; 33:3048-3053. [DOI: 10.1021/acs.chemrestox.0c00387] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Shotaro Uehara
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Manae Yoshizawa
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Ayane Nakano
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Mayu Yanagi
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Hiroshi Suemizu
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
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Miura T, Kamiya Y, Hina S, Kobayashi Y, Murayama N, Shimizu M, Yamazaki H. Metabolic profiles of coumarin in human plasma extrapolated from a rat data set with a simplified physiologically based pharmacokinetic model. J Toxicol Sci 2020; 45:695-700. [PMID: 33132243 DOI: 10.2131/jts.45.695] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Coumarin is a dietary-derived substance that is extensively metabolized by human liver to excretable 7-hydroxycoumarin. Although coumarin under daily dietary consumption is generally regarded as nontoxic, the substance is of toxicological and clinical interest because of its potential association with hepatotoxicity, which is especially evident in rats. In this study, the pharmacokinetics of coumarin were modeled after virtual oral administration in humans. The adjusted monitoring equivalents of coumarin, along with the biotransformation of coumarin to o-hydroxyphenylacetic acid (via 3,4-epoxidation) based on reported plasma concentrations from rat studies, were scaled to human coumarin equivalents using known species allometric scaling factors. Using rat and human liver preparations, data on the rapid in vitro metabolic clearance for humans (~50-fold faster than in rats) were obtained for in vitro-in vivo extrapolation. For human physiologically based pharmacokinetic (PBPK) modeling, the metabolic ratios to o-hydroxyphenylacetic acid and 7-hydroxycoumarin were set at minor (0.1) and major (0.9) levels for the total disappearance of coumarin. The resulting modeled plasma concentration curves in humans generated by simple PBPK models were consistent with reported simulated coumarin maximum concentrations. These results provide basic information to simulate plasma levels of coumarin and its primary metabolite 7-hydroxycoumarin or its secondary activated metabolite o-hydroxyphenylacetic acid (via 3,4-epoxidation) resulting from dietary foodstuff consumption. Under the current assumptions, little toxicological impact of coumarin was evident in humans, thereby indicating the usefulness of forward dosimetry using PBPK modeling for human risk assessment.
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Miura T, Uehara S, Shigeta K, Yoshizawa M, Kamiya Y, Murayama N, Shimizu M, Suemizu H, Yamazaki H. Metabolic Profiles of Tetrabromobisphenol A in Humans Extrapolated from Humanized-Liver Mouse Data Using a Simplified Physiologically Based Pharmacokinetic Model. Chem Res Toxicol 2020; 34:522-528. [PMID: 33198470 DOI: 10.1021/acs.chemrestox.0c00358] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Tetrabromobisphenol A, a brominated flame retardant, is increasingly prevalent worldwide and presents a potential health risk. Adjusted animal biomonitoring equivalents of tetrabromobisphenol A after orally administered doses in humanized-liver mice were scaled up to humans using known species allometric scaling factors to set up simplified physiologically based pharmacokinetic (PBPK) models. Absorbed tetrabromobisphenol A was slightly, moderately, and extensively metabolized in vivo to its glucuronide in rats, control mice, and humanized-liver mice tested, respectively. In silico estimated hepatic exposures of tetrabromobisphenol A and its glucuronide generated using the rat PBPK model-generated plasma concentration profiles were consistent with the reported values. The extent of hepatic injury in humanized-liver mice caused by tetrabromobisphenol A was evaluated by detecting human albumin mRNA in mouse plasma after oral administration of a high dose of tetrabromobisphenol A (1000 mg/kg). Reverse dosimetry analyses were carried out using two human PBPK models (set up based on the humanized-liver-mouse model and by optimizing the input parameters for reported human plasma concentrations of tetrabromobisphenol A glucuronide) to estimate the tetrabromobisphenol A daily intake based on reported human serum concentrations of total tetrabromobisphenol A from biomonitoring data. Within the predictability of the forward and reverse dosimetry estimations, the calculated daily intake was found to be far below established health benchmark levels (i.e., the suggested daily reported reference dose) with a wide (4 orders of magnitude) safety margin. These results suggest that the simplified PBPK models can be successfully applied to forward and reverse dosimetry estimations of tissue and/or blood exposures of tetrabromobisphenol A in humans after oral doses.
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Affiliation(s)
- Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Shotaro Uehara
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Kazuki Shigeta
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Manae Yoshizawa
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Hiroshi Suemizu
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
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Ogawa SI, Shimizu M, Kamiya Y, Uehara S, Suemizu H, Yamazaki H. Increased plasma concentrations of an antidyslipidemic drug pemafibrate co-administered with rifampicin or cyclosporine A in cynomolgus monkeys genotyped for the organic anion transporting polypeptide 1B1. Drug Metab Pharmacokinet 2020; 35:354-360. [DOI: 10.1016/j.dmpk.2020.03.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 03/02/2020] [Accepted: 03/24/2020] [Indexed: 12/21/2022]
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Sakimoto Y, Mizuno J, Kida H, Kamiya Y, Ono Y, Mitsushima D. Learning Promotes Subfield-Specific Synaptic Diversity in Hippocampal CA1 Neurons. Cereb Cortex 2020; 29:2183-2195. [PMID: 30796817 PMCID: PMC6459007 DOI: 10.1093/cercor/bhz022] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 01/25/2019] [Accepted: 01/28/2019] [Indexed: 12/18/2022] Open
Abstract
The hippocampus is functionally heterogeneous between the dorsal and ventral subfields with left–right asymmetry. To determine the possible location of contextual memory, we performed an inhibitory avoidance task to analyze synaptic plasticity using slice patch-clamp technique. The training bilaterally increased the AMPA/NMDA ratio at dorsal CA3–CA1 synapses, whereas the training did not affect the ratio at ventral CA3–CA1 synapses regardless of the hemisphere. Moreover, sequential recording of miniature excitatory postsynaptic currents and miniature inhibitory postsynaptic currents from the same CA1 neuron clearly showed learning-induced synaptic plasticity. In dorsal CA1 neurons, the training dramatically strengthened both excitatory and inhibitory postsynaptic responses in both hemispheres, whereas the training did not promote the plasticity in either hemisphere in ventral CA1 neurons. Nonstationary fluctuation analysis further revealed that the training bilaterally increased the number of AMPA or GABAA receptor channels at dorsal CA1 synapses, but not at ventral CA1 synapses, suggesting functional heterogeneity of learning-induced receptor mobility. Finally, the performance clearly impaired by the bilateral microinjection of plasticity blockers in dorsal, but not ventral CA1 subfields, suggesting a crucial role for contextual learning. The quantification of synaptic diversity in specified CA1 subfields may help us to diagnose and evaluate cognitive disorders at the information level.
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Affiliation(s)
- Y Sakimoto
- Department of Physiology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | | | - H Kida
- Department of Physiology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan
| | - Y Kamiya
- Uonuma Institute of Community Medicine, Niigata University Medical Hospital, Niigata, Japan
| | - Y Ono
- Department of Electronics and Bioinformatics, Meiji University School of Science and Technology, Tokyo, Japan
| | - D Mitsushima
- Department of Physiology, Yamaguchi University Graduate School of Medicine, Yamaguchi, Japan.,Department of Physiology and Neuroscience, Kanagawa Dental University, Kanagawa, Japan.,The Research Institute for Time Studies, Yamaguchi University, Yamaguchi, Japan
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22
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Kamiya Y, Otsuka S, Miura T, Yoshizawa M, Nakano A, Iwasaki M, Kobayashi Y, Shimizu M, Kitajima M, Shono F, Funatsu K, Yamazaki H. Physiologically Based Pharmacokinetic Models Predicting Renal and Hepatic Concentrations of Industrial Chemicals after Virtual Oral Doses in Rats. Chem Res Toxicol 2020; 33:1736-1751. [PMID: 32500706 DOI: 10.1021/acs.chemrestox.0c00009] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Recently developed high-throughput in vitro assays in combination with computational models could provide alternatives to animal testing. The purpose of the present study was to model the plasma, hepatic, and renal pharmacokinetics of approximately 150 structurally varied types of drugs, food components, and industrial chemicals after virtual external oral dosing in rats and to determine the relationship between the simulated internal concentrations in tissue/plasma and their lowest-observed-effect levels. The model parameters were based on rat plasma data from the literature and empirically determined pharmacokinetics measured after oral administrations to rats carried out to evaluate hepatotoxic or nephrotic potentials. To ensure that the analyzed substances exhibited a broad diversity of chemical structures, their structure-based location in the chemical space underwent projection onto a two-dimensional plane, as reported previously, using generative topographic mapping. A high-throughput in silico one-compartment model and a physiologically based pharmacokinetic (PBPK) model consisting of chemical receptor (gut), metabolizing (liver), central (main), and excreting (kidney) compartments were developed in parallel. For 159 disparate chemicals, the maximum plasma concentrations and the areas under the concentration-time curves obtained by one-compartment models and modified simple PBPK models were closely correlated. However, there were differences between the PBPK modeled and empirically obtained hepatic/renal concentrations and plasma maximal concentrations/areas under the concentration-time curves of the 159 chemicals. For a few compounds, the lowest-observed-effect levels were available for hepatotoxicity and nephrotoxicity in the Hazard Evaluation Support System Integrated Platform in Japan. The areas under the renal or hepatic concentration-time curves estimated using PBPK modeling were inversely associated with these lowest-observed-effect levels. Using PBPK forward dosimetry could provide the plasma/tissue concentrations of drugs and chemicals after oral dosing, thereby facilitating estimates of nephrotoxic or hepatotoxic potential as a part of the risk assessment.
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Affiliation(s)
- Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Shohei Otsuka
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Manae Yoshizawa
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Ayane Nakano
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Miyu Iwasaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Yui Kobayashi
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
| | - Masato Kitajima
- Fujitsu Kyusyu Systems, Higashi-hie, Hakata-ku, Fukuoka 812-0007, Japan
| | - Fumiaki Shono
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kimito Funatsu
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan
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Kamiya Y, Takaku H, Yamada R, Akase C, Abe Y, Sekiguchi Y, Murayama N, Shimizu M, Kitajima M, Shono F, Funatsu K, Yamazaki H. Determination and prediction of permeability across intestinal epithelial cell monolayer of a diverse range of industrial chemicals/drugs for estimation of oral absorption as a putative marker of hepatotoxicity. Toxicol Rep 2020; 7:149-154. [PMID: 31993333 PMCID: PMC6976901 DOI: 10.1016/j.toxrep.2020.01.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 01/04/2020] [Accepted: 01/13/2020] [Indexed: 11/19/2022] Open
Abstract
Permeability values of 90 industry chemicals were measured by a Caco-2 system. A multivariate prediction equation for permeability of chemicals was proposed. Chemical permeability coefficients were inversely associated with hepatic NOELs.
Apparent permeability coefficients (Papp) across a human intestinal epithelial Caco-2 cell monolayer were measured for a range of industrial/drug chemicals. A predictive equation for determining in vitro Papp values of fifty-six substances was set up using multivariate regression analysis based on in silico-estimated physicochemical properties (molecular weights and water distribution coefficients for apical and basal pH environments) (r = 0.77, p < 0.01). Predicted logPapp values of a secondary set of 34 compounds were correlated with the measured values. Under the medicinal logPapp values associated with their reported fraction absorbed, a significant inverse non-linear correlation was found between the logarithmic transformed values of observed Papp values and reported hepatic no-observed-effect levels of industrial chemicals (r = –0.55, p < 0.01, n = 29). In vitro determination and/or in silico prediction of permeability across intestinal cells could be effective for estimating oral absorption as a putative indicator for hepatotoxicity.
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Affiliation(s)
- Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Hiroka Takaku
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Rio Yamada
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Chisato Akase
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Yuto Abe
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Yuko Sekiguchi
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
| | | | - Fumiaki Shono
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kimito Funatsu
- Department of Chemical System Engineering, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan
- Corresponding author at: Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo, 194-8543, Japan.
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Kamiya Y, Takaku H, Yamada R, Yamazaki H. P205 - Determination of permeability across Caco-2 cell monolayer and development of predictable equations for oral absorbability of general chemical substances. Drug Metab Pharmacokinet 2020. [DOI: 10.1016/j.dmpk.2020.04.206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kamiya Y, Yanagi M, Hina S, Shigeta K, Miura T, Yamazaki H. Plasma, liver, and kidney exposures in rats after oral doses of industrial chemicals predicted using physiologically based pharmacokinetic models: A case study of perfluorooctane sulfonic acid. J Toxicol Sci 2020; 45:763-767. [DOI: 10.2131/jts.45.763] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Mayu Yanagi
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Shiori Hina
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Kazuki Shigeta
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
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26
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Ota M, Shimizu M, Kamiya Y, Emoto C, Fukuda T, Yamazaki H. Adult and infant pharmacokinetic profiling of dihydrocodeine using physiologically based pharmacokinetic modeling. Biopharm Drug Dispos 2019; 40:350-357. [PMID: 31691978 DOI: 10.1002/bdd.2209] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 10/16/2019] [Accepted: 10/25/2019] [Indexed: 01/11/2023]
Abstract
We previously analysed the serum concentrations of dihydrocodeine in a 1-month-old infant with respiratory depression after being prescribed dihydrocodeine phosphate 2.0 mg/day divided t.i.d. for 2 days. The purpose was to develop a full physiologically based pharmacokinetic (PBPK) model that could account for these and other drug monitoring results. Based on experiments in Caco-2 cell monolayers, the effective permeability of dihydrocodeine in human jejunum was established as 1.28 × 10-4 cm/s. The in vitro Vmax /Km values for dihydrocodeine demethylation mediated by recombinant cytochrome P450 2D6 and 3A4 were 0.19 and 0.066 μl/min/pmol, respectively, and for dihydrocodeine 6-O-glucuronidation mediated by recombinant UGT2B4 and 2B7, the Vmax /Km values were 0.14 and 0.22 μl/min/mg protein, respectively. Renal clearance was calculated as 5.37 L/h on the total clearance value multiplied by the fraction recovered in urine. The reported plasma concentration-time profiles of dihydrocodeine after intravenous administration in healthy volunteers were used to adjust the tissue partitioning ratios. The developed model simulated the pharmacokinetic profiles of dihydrocodeine after single and multiple oral administrations reasonably well in the same population. Subsequently, the validated model was used to simulate pharmacokinetic profiles for five pediatric cases, including the 1-month-old Japanese boy and a 14-year-old Japanese girl who took an overdose of dihydrocodeine phosphate (37 mg). The simulated pharmacokinetic profiles for five virtual pediatric subjects matching the age, gender, and P450 2D6 phenotype of each case approximately reflected the observed values. These results suggested that our dihydrocodeine PBPK model reproduced the results of clinical cases reasonably well for subjects.
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Affiliation(s)
- Miki Ota
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Makiko Shimizu
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Yusuke Kamiya
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Chie Emoto
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Tsuyoshi Fukuda
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
| | - Hiroshi Yamazaki
- Showa Pharmaceutical University, Machida, Tokyo, 194-8543, Japan
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Yamazaki H, Kamiya Y. Extrapolation of Hepatic Concentrations of Industrial Chemicals Using Pharmacokinetic Models to Predict Hepatotoxicity. Toxicol Res 2019; 35:295-301. [PMID: 31636840 PMCID: PMC6791659 DOI: 10.5487/tr.2019.35.4.295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 08/12/2019] [Accepted: 08/26/2019] [Indexed: 11/20/2022] Open
Abstract
In this review, we describe the absorption rates (Caco-2 cell permeability) and hepatic/plasma pharmacokinetics of 53 diverse chemicals estimated by modeling virtual oral administration in rats. To ensure that a broad range of chemical structures is present among the selected substances, the properties described by 196 chemical descriptors in a chemoinformatics tool were calculated for 50,000 randomly selected molecules in the original chemical space. To allow visualization, the resulting chemical space was projected onto a two-dimensional plane using generative topographic mapping. The calculated absorbance rates of the chemicals based on cell permeability studies were found to be inversely correlated to the no-observed-effect levels for hepatoxicity after oral administration, as obtained from the Hazard Evaluation Support System Integrated Platform in Japan (r = -0.88, p < 0.01, n = 27). The maximum plasma concentrations and the areas under the concentration-time curves (AUC) of a varied selection of chemicals were estimated using two different methods: simple one-compartment models (i.e., high-throughput toxicokinetic models) and simplified physiologically based pharmacokinetic (PBPK) modeling consisting of chemical receptor (gut), metabolizing (liver), and central (main) compartments. The results obtained from the two methods were consistent. Although the maximum concentrations and AUC values of the 53 chemicals roughly correlated in the liver and plasma, inconsistencies were apparent between empirically measured concentrations and the PBPK-modeled levels. The lowest-observed-effect levels and the virtual hepatic AUC values obtained using PBPK models were inversely correlated (r = -0.78, p < 0.05, n = 7). The present simplified PBPK models could estimate the relationships between hepatic/plasma concentrations and oral doses of general chemicals using both forward and reverse dosimetry. These methods are therefore valuable for estimating hepatotoxicity.
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Affiliation(s)
- Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Tokyo, Japan
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Tokyo, Japan
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Tanou M, Kamiya Y. Assessing the impact of geographical access to health facilities on maternal healthcare utilization: evidence from the Burkina Faso demographic and health survey 2010. BMC Public Health 2019; 19:838. [PMID: 31248393 PMCID: PMC6598277 DOI: 10.1186/s12889-019-7150-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 06/10/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Improving maternal and child health (MCH) remains a serious challenge for many developing countries. Geographical accessibility from a residence to the nearest health facility is suspected to be an important obstacle hampering the use of appropriate services for MCH especially in Sub-Sharan African countries. In Burkina Faso, a landlocked country in the Sahel region of West Africa, women's use of proper healthcare services during pregnancy and childbirth is still low. This study therefore assessed the impact of geographical access to health facilities on maternal healthcare utilization in Burkina Faso. METHODS We used the Burkina Faso demographic and health survey (DHS) 2010 dataset, with its sample of 10,364 mothers aged 15-49 years. Distance from residential areas to the closest health facility was measured by merging the DHS dataset with Geographic Information System data on the location of health centers in Burkina Faso. Multivariate logistic regressions were conducted to estimate the effects of distance on maternal healthcare utilization. RESULTS Regression results revealed that the longer the distance to the closest health center, the less likely it is that a woman will receive appropriate maternal healthcare services. The estimates show that one kilometer increase in distance to the closest health center reduces the odds that a woman will receive four or more antenatal care by 0.05 and reduces by 0.267 the odds that she will deliver her baby with the assistance of a skilled birth attendant. CONCLUSIONS Improving geographical access to health facilities increases the use of appropriate healthcare services during pregnancy and childbirth. Investment in transport infrastructure should be a prioritized target for further improvement in MCH in Burkina Faso.
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Affiliation(s)
- Mariam Tanou
- Ministry of Infrastructure, Building Lamizana, Ouagadougou, 03BP7011, Burkina Faso
| | - Yusuke Kamiya
- Ryukoku University, Faculty of Economics, 67 Tsukamoto-cho, Fukakusa, Fushimi-ku, Kyoto, 612-8577, Japan.
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Kamiya Y, Otsuka S, Miura T, Takaku H, Yamada R, Nakazato M, Nakamura H, Mizuno S, Shono F, Funatsu K, Yamazaki H. Correction to "Plasma and Hepatic Concentrations of Chemicals after Virtual Oral Administrations Extrapolated Using Rat Plasma Data and Simple Physiologically Based Pharmacokinetic Models". Chem Res Toxicol 2019; 32:792. [PMID: 30900873 DOI: 10.1021/acs.chemrestox.9b00063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Miura T, Uehara S, Mizuno S, Yoshizawa M, Murayama N, Kamiya Y, Shimizu M, Suemizu H, Yamazaki H. Steady-State Human Pharmacokinetics of Monobutyl Phthalate Predicted by Physiologically Based Pharmacokinetic Modeling Using Single-Dose Data from Humanized-Liver Mice Orally Administered with Dibutyl Phthalate. Chem Res Toxicol 2019; 32:333-340. [DOI: 10.1021/acs.chemrestox.8b00361] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Shotaro Uehara
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Sawa Mizuno
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Manae Yoshizawa
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
| | - Hiroshi Suemizu
- Laboratory Animal Research Department, Central Institute for Experimental Animals, Kawasaki-ku, Kawasaki 210-0821, Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, Machida, Tokyo 194-8543, Japan
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Miura T, Uehara S, Nakazato M, Kusama T, Toda A, Kamiya Y, Murayama N, Shimizu M, Suemizu H, Yamazaki H. Human plasma and liver concentrations of styrene estimated by combining a simple physiologically based pharmacokinetic model with rodent data. J Toxicol Sci 2019; 44:543-548. [DOI: 10.2131/jts.44.543] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
| | | | | | | | - Akiko Toda
- Shin Nippon Biomedical Laboratories, Ltd
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Omori S, Kamiya Y, Yamaki T, Uchida M, Ohtake K, Kimura M, Natsume H. Enhancement Effect of Poly-L-ornithine on the Nasal Absorption of Water-Soluble Macromolecules in Rats. Biol Pharm Bull 2019; 42:144-148. [DOI: 10.1248/bpb.b18-00673] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Shigehiro Omori
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University
| | - Yusuke Kamiya
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Tsutomu Yamaki
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University
| | - Masaki Uchida
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University
| | - Kazuo Ohtake
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University
| | | | - Hideshi Natsume
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University
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Kamiya Y, Otsuka S, Miura T, Takaku H, Yamada R, Nakazato M, Nakamura H, Mizuno S, Shono F, Funatsu K, Yamazaki H. Plasma and Hepatic Concentrations of Chemicals after Virtual Oral Administrations Extrapolated Using Rat Plasma Data and Simple Physiologically Based Pharmacokinetic Models. Chem Res Toxicol 2018; 32:211-218. [PMID: 30511563 DOI: 10.1021/acs.chemrestox.8b00307] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Only a small fraction of chemicals possesses adequate in vivo toxicokinetic data for assessing potential hazards. The aim of the present study was to model the plasma and hepatic pharmacokinetics of more than 50 disparate types of chemicals and drugs after virtual oral administrations in rats. The models were based on reported pharmacokinetics determined after oral administration to rats. An inverse relationship was observed between no-observed-effect levels after oral administration and chemical absorbance rates evaluated for cell permeability ( r = -0.98, p < 0.001, n = 17). For a varied selection of more than 30 chemicals, the plasma concentration curves and the maximum concentrations obtained using a simple one-compartment model (recently recommended as a high-throughput toxicokinetic model) and a simple physiologically based pharmacokinetic (PBPK) model (consisting of chemical receptor, metabolizing, and central compartments) were highly consistent. The hepatic and plasma concentrations and the hepatic and plasma areas under the concentration-time curves of more than 50 chemicals were roughly correlated; however, differences were evident between the PBPK-modeled values in livers and empirically obtained values in plasma. Of the compounds selected for analysis, only seven had the lowest observed effect level (LOEL) values for hepatoxicity listed in the Hazard Evaluation Support System Integrated Platform in Japan. For these seven compounds, the LOEL values and the areas under the hepatic concentration-time curves estimated using PBPK modeling were inversely correlated ( r = -0.78, p < 0.05, n = 7). This study provides important information to help simulate the high hepatic levels of potent hepatotoxic compounds. Using suitable PBPK parameters, the present models could estimate the plasma/hepatic concentrations of chemicals and drugs after oral doses using both PBPK forward and reverse dosimetry, thereby indicating the potential value of this modeling approach in predicting hepatic toxicity as a part of risk assessments of chemicals absorbed in the human body.
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Affiliation(s)
- Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Shohei Otsuka
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Tomonori Miura
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Hiroka Takaku
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Rio Yamada
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Mayuko Nakazato
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Hitomi Nakamura
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Sawa Mizuno
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
| | - Fumiaki Shono
- Department of Chemical System Engineering, School of Engineering , The University of Tokyo , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Kimito Funatsu
- Department of Chemical System Engineering, School of Engineering , The University of Tokyo , Bunkyo-ku, Tokyo 113-8656 , Japan
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics , Showa Pharmaceutical University , 3-3165 Higashi-tamagawa Gakuen , Machida, Tokyo 194-8543 , Japan
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34
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Murayama N, Suemizu H, Uehara S, Kusama T, Mitsui M, Kamiya Y, Shimizu M, Guengerich FP, Yamazaki H. Association of pharmacokinetic profiles of lenalidomide in human plasma simulated using pharmacokinetic data in humanized-liver mice with liver toxicity detected by human serum albumin RNA. J Toxicol Sci 2018; 43:369-375. [PMID: 29877213 DOI: 10.2131/jts.43.369] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Lenalidomide has been shown to be potentially teratogenic in thalidomide-sensitive animal species. Screening for thalidomide analogs devoid of teratogenicity/toxicity-attributable to drug metabolism and disposition, but having immunomodulatory properties-is a strategic pathway towards development of new anticancer drugs. Plasma concentrations of lenalidomide were investigated in immunodeficient control and humanized-liver mice following oral administration of lenalidomide (50 mg/kg). Plasma concentrations of lenalidomide (1-2 hr after administration) were slightly but significantly higher in humanized-liver mice than in control mice (p < 0.05). Human albumin mRNA, a liver-specific toxicity marker, was found in the blood of humanized-liver mice 24 hr after lenalidomide administration. Simulations of human plasma concentrations of lenalidomide were achieved with simplified physiologically-based pharmacokinetic models in control and humanized-liver mice or by the direct fitting analysis of reported human data, in accordance with reported lenalidomide concentrations after low dose administration in humans. The results indicate that pharmacokinetic profiles of lenalidomide, a compound resulting from introducing one aromatic amino group into thalidomide and removing one keto group, resulted in less species variation in in vivo pharmacokinetics in control and humanized-liver mice and that immunodeficient humanized-liver mice can serve as experimental model animals for human liver injury in drug development at high doses, with human albumin RNA analysis in plasma.
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Affiliation(s)
- Norie Murayama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | | | | | - Takashi Kusama
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Marina Mitsui
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Yusuke Kamiya
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - Makiko Shimizu
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
| | - F Peter Guengerich
- Department of Biochemistry, Vanderbilt University School of Medicine, USA
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University
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Kamiya Y, Ge L, Hong T, Qiu Y, Quintero-Castro DL, Lu Z, Cao HB, Matsuda M, Choi ES, Batista CD, Mourigal M, Zhou HD, Ma J. Author Correction: The nature of spin excitations in the one-third magnetization plateau phase of Ba 3CoSb 2O 9. Nat Commun 2018; 9:3110. [PMID: 30068947 PMCID: PMC6070534 DOI: 10.1038/s41467-018-05679-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- Y Kamiya
- Condensed Matter Theory Laboratory, RIKEN, Wako, 351-0198, Saitama, Japan.
| | - L Ge
- School of Physics, Georgia Institute of Technology, 30332, Atlanta, GA, USA
| | - Tao Hong
- Neutron Scattering Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
| | - Y Qiu
- NIST Centre for Neutron Research, National Institute of Standards and Technology, 20899, Gaithersburg, MD, USA
| | - D L Quintero-Castro
- Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109, Berlin, Germany
| | - Z Lu
- Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109, Berlin, Germany
| | - H B Cao
- Neutron Scattering Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
| | - M Matsuda
- Neutron Scattering Division, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
| | - E S Choi
- National High Magnetic Field Laboratory, Florida State University, 32310, Tallahassee, FL, USA
| | - C D Batista
- Department of Physics and Astronomy, University of Tennessee, 37996, Knoxville, TN, USA.,Neutron Scattering Division and Shull-Wollan Center, Oak Ridge National Laboratory, 37831, Oak Ridge, TN, USA
| | - M Mourigal
- School of Physics, Georgia Institute of Technology, 30332, Atlanta, GA, USA
| | - H D Zhou
- National High Magnetic Field Laboratory, Florida State University, 32310, Tallahassee, FL, USA.,Department of Physics and Astronomy, University of Tennessee, 37996, Knoxville, TN, USA
| | - J Ma
- Department of Physics and Astronomy, University of Tennessee, 37996, Knoxville, TN, USA. .,Key Laboratory of Artificial Structures and Quantum Control, Department of Physics and Astronomy, Shanghai Jiao Tong University, 200240, Shanghai, China. .,Collaborative Innovation Center of Advanced Microstructures, 210093, Nanjing, Jiangsu, China.
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Kamiya Y, Ge L, Hong T, Qiu Y, Quintero-Castro DL, Lu Z, Cao HB, Matsuda M, Choi ES, Batista CD, Mourigal M, Zhou HD, Ma J. The nature of spin excitations in the one-third magnetization plateau phase of Ba 3CoSb 2O 9. Nat Commun 2018; 9:2666. [PMID: 29991805 PMCID: PMC6039502 DOI: 10.1038/s41467-018-04914-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Accepted: 05/21/2018] [Indexed: 11/25/2022] Open
Abstract
Magnetization plateaus in quantum magnets—where bosonic quasiparticles crystallize into emergent spin superlattices—are spectacular yet simple examples of collective quantum phenomena escaping classical description. While magnetization plateaus have been observed in a number of spin-1/2 antiferromagnets, the description of their magnetic excitations remains an open theoretical and experimental challenge. Here, we investigate the dynamical properties of the triangular-lattice spin-1/2 antiferromagnet Ba3CoSb2O9 in its one-third magnetization plateau phase using a combination of nonlinear spin-wave theory and neutron scattering measurements. The agreement between our theoretical treatment and the experimental data demonstrates that magnons behave semiclassically in the plateau in spite of the purely quantum origin of the underlying magnetic structure. This allows for a quantitative determination of Ba3CoSb2O9 exchange parameters. We discuss the implication of our results to the deviations from semiclassical behavior observed in zero-field spin dynamics of the same material and conclude they must have an intrinsic origin. Frustrated magnetic materials attract significant interest because their properties can become dominated by quantum fluctuations. Here the authors show that excitations in the plateau phase of a quantum magnet can be understood semiclassically even though the ground state involves strong quantum effects.
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Affiliation(s)
- Y Kamiya
- Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama, 351-0198, Japan.
| | - L Ge
- School of Physics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Tao Hong
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Y Qiu
- NIST Centre for Neutron Research, National Institute of Standards and Technology, Gaithersburg, MD, 20899, USA
| | - D L Quintero-Castro
- Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109, Berlin, Germany
| | - Z Lu
- Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109, Berlin, Germany
| | - H B Cao
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - M Matsuda
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - E S Choi
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA
| | - C D Batista
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA.,Neutron Scattering Division and Shull-Wollan Center, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - M Mourigal
- School of Physics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - H D Zhou
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32310, USA.,Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA
| | - J Ma
- Department of Physics and Astronomy, University of Tennessee, Knoxville, TN, 37996, USA. .,Key Laboratory of Artificial Structures and Quantum Control, Department of Physics and Astronomy, Shanghai Jiao Tong University, 200240, Shanghai, China. .,Collaborative Innovation Center of Advanced Microstructures, 210093, Nanjing, Jiangsu, China.
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37
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Kamiya Y, Nomura M, Ogino H, Yoshikawa K, Siengsounthone L, Xangsayarath P. Mothers' autonomy and childhood stunting: evidence from semi-urban communities in Lao PDR. BMC Womens Health 2018; 18:70. [PMID: 29789003 PMCID: PMC5964969 DOI: 10.1186/s12905-018-0567-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Accepted: 05/16/2018] [Indexed: 11/10/2022]
Abstract
Background Childhood stunting (height-for-age z-scores below − 2), a form of chronic undernutrition, remains a global health burden. Although a growing literature has examined the association between mothers’ autonomy and childhood stunting, these studies have been limited to countries in South Asia or Sub-Saharan Africa where women have relatively lower social status than do men. Little research has analyzed the effect of mothers’ autonomy on childhood stunting in Lao PDR, where women’s social status is relatively high compared to that in other countries. Methods We conducted a cross-sectional questionnaire and body scale measurement targeting 100 mothers and their 115 children (<5 years old) from semi-urban communities in Lao PDR, which is the country with the highest prevalence of childhood stunting in the Indochina region. As dimensions of women’s autonomy, we measured self-esteem, self-efficacy, decision-making power, freedom of mobility, and control of money. We then analyzed how each dimension was associated with the likelihood of childhood stunting. Results The likelihood of childhood stunting was significantly lower if mothers had higher self-efficacy for health care (OR = 0.15, p = 0.007), self-esteem (OR = 0.11, p = 0.025), or control of money (OR = 0.11, p = 0.041). In contrast, mothers’ decision-making power and freedom of mobility were not significantly associated with childhood stunting. Conclusions We clarified which dimensions of women’s autonomy were associated with childhood stunting in Lao PDR. A closer examination of mothers’ autonomy will aid proper understanding of the determinants of childhood stunting.
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Affiliation(s)
- Yusuke Kamiya
- Faculty of Economics, Ryukoku University, 67 Tsukamoto-cho, Fukakusa, Fushimi-ku, Kyoto, 612-8577, Japan.
| | - Marika Nomura
- Japan International Cooperation Agency, 1-6th floor, Nibancho Center Building, 5-25 Niban-cho, Chiyoda-ku, Tokyo, 102-8012, Japan
| | - Hina Ogino
- Mie Prefectural College of Nursing, 1-1-1 Yumegaoka, Tsu-shi, Mie, 514-0116, Japan
| | - Kanako Yoshikawa
- Osaka School of International Public Policy, Osaka University, 1-31 Machikaneyama, Toyonaka-shi, Osaka, 560-0043, Japan
| | - Latsamy Siengsounthone
- National Institute of Public Health, Ministry of Health, Samsenthai Road, Ban Kaognot, Sisattanack district, Vientiane Capital, Lao People's Democratic Republic
| | - Phonepadith Xangsayarath
- National Center for Laboratory and Epidemiology, Ministry of Health, Ban Watnak, Sisattanak district, Vientiane Capital, Lao People's Democratic Republic
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38
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Kamiya Y, Yamaki T, Omori S, Uchida M, Ohtake K, Kimura M, Yamazaki H, Natsume H. Improved Intranasal Retentivity and Transnasal Absorption Enhancement by PEGylated Poly-l-ornithine. Pharmaceuticals (Basel) 2018; 11:ph11010009. [PMID: 29370117 PMCID: PMC5874705 DOI: 10.3390/ph11010009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 01/17/2018] [Accepted: 01/19/2018] [Indexed: 11/25/2022] Open
Abstract
We reported that the introduction of polyethylene glycol (PEG) to poly-l-ornithine (PLO), which is an homopolymeric basic amino acid having absorption-enhancement ability, prolonged retention time in an in vitro inclined plate test, probably due to an increase in viscosity caused by PEGylation. The aim of the present study is to investigate whether the introduction of PEG chains to PLO improves intranasal retention and transnasal absorption in vivo. We performed intranasal administration experiments using PLO and PEG-PLO with a model drug, fluorescein isothiocyanate dextran (FD-4), in rats under closed and open systems. In the open system, transition of plasma FD-4 concentration after co-administration with unmodified PLO was low, and the area under the plasma concentration-time curve (AUC) decreased to about 60% of that in the closed system. In contrast, the AUC after co-administration with PEG-PLO in the open system was about 90% of that in the closed system, and the transition of plasma FD-4 concentration and FD-4 absorption profile were similar to those of the closed system. These findings indicate that introducing PEG chains to homopolymeric basic amino acids (HPBAAs) is a very useful method for developing a functional absorption enhancer that can exhibit an efficient in vivo absorption-enhancing effect.
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Affiliation(s)
- Yusuke Kamiya
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Tsutomu Yamaki
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Shigehiro Omori
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Masaki Uchida
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Kazuo Ohtake
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Mitsutoshi Kimura
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
| | - Hiroshi Yamazaki
- Laboratory of Drug Metabolism and Pharmacokinetics, Showa Pharmaceutical University, 3-3165 Higashi-tamagawa Gakuen, Machida, Tokyo 194-8543, Japan.
| | - Hideshi Natsume
- Faculty of Pharmaceutical Sciences, Josai University, 1-1 Keyakidai, Sakado, Saitama 350-0295, Japan.
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Žukovič M, Tomita Y, Kamiya Y. Ordering phenomena in a heterostructure of frustrated and unfrustrated triangular-lattice Ising layers. Phys Rev E 2018; 96:012145. [PMID: 29347216 DOI: 10.1103/physreve.96.012145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Indexed: 11/07/2022]
Abstract
We study critical and magnetic properties of a bilayer Ising system consisting of two triangular planes A and B, with the antiferromagnetic (AF) coupling J_{A} and the ferromagnetic (FM) one J_{B} for the respective layers, which are coupled by the interlayer interaction J_{AB} by using Monte Carlo simulations. When J_{A} and J_{B} are of the same order, the unfrustrated FM plane orders first at a high temperature T_{c1}∼J_{B}. The spontaneous FM order then exerts influence on the other frustrated AF plane as an effective magnetic field, which subsequently induces a ferrimagnetic order in this plane at low temperatures below T_{c2}. When short-range order is developed in the AF plane while the influence of the FM plane is still small, there appears a preemptive Berezinskii-Kosterlitz-Thouless-type pseudocritical crossover regime just above the ferrimagnetic phase transition point, where the short-distance behavior up to a rather large length scale exponentially diverging in ∝J_{A}/T is controlled by a line of Gaussian fixed points at T=0. In the crossover region, a continuous variation in the effective critical exponent 4/9≲η^{eff}≲1/2 is observed. The phase diagram by changing the ratio J_{A}/J_{B} is also investigated.
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Affiliation(s)
- Milan Žukovič
- Institute of Physics, Faculty of Science, P. J. Šafárik University, Park Angelinum 9, 040 01 Košice, Slovakia
| | - Yusuke Tomita
- College of Engineering, Shibaura Institute of Technology, Saitama 337-8570, Japan
| | - Y Kamiya
- Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
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40
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Nomura M, Xangsayarath P, Takahashi K, Kamiya Y, Siengsounthone L, Ogino H, Kobayashi J. Socioeconomic determinants of accessibility to birth registration in Lao PDR. BMC Public Health 2018; 18:116. [PMID: 29310660 PMCID: PMC5759213 DOI: 10.1186/s12889-017-5009-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Accepted: 12/20/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The global coverage rate of birth registration is only around 65% for the population of children under five although birth registration secures protection and access to health services that are fundamental rights for all babies. This study aimed to perform a basic analysis of the accessibility to birth registration to better understand how to improve the birth registration system in the Lao PDR. METHODS For the analysis of birth registration and related socioeconomic factors, 9576 mother-child pairs were chosen from the data set of The Lao Social Indicator Survey 2011-12. After bivariate analysis with statistical tests including the chi-square test were conducted, logistic regression was performed to determine the variables that statistically influence accessibility to birth registration. RESULTS Ethno-geographic factors and place of delivery were observed to be the factors associated with birth registration in this analysis. CONCLUSION Many mothers in the Lao PDR deliver in their local communities. Therefore, capacity development of various human resources, such as Skilled Birth Attendant, to support the local administrative procedure of birth registration in their communities could be one option to overcoming the bottlenecks in the birth registration process in the Lao PDR.
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Affiliation(s)
- Marika Nomura
- Department of International Health and Collaboration, National Institute of Public Health, 2-3-6 Minami, Wako-shi, Saitama, 351-0197, Japan.
| | | | | | | | | | - Hina Ogino
- Yokkaichi Nursing and Medical Care University, Mie, Japan
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Kamiya Y, Ishijma H, Hagiwara A, Takahashi S, Ngonyani HAM, Samky E. Evaluating the impact of continuous quality improvement methods at hospitals in Tanzania: a cluster-randomized trial. Int J Qual Health Care 2017; 29:32-39. [PMID: 27920249 DOI: 10.1093/intqhc/mzw128] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Accepted: 10/12/2016] [Indexed: 12/25/2022] Open
Abstract
Objective To evaluate the impact of implementing continuous quality improvement (CQI) methods on patient's experiences and satisfaction in Tanzania. Design Cluster-randomized trial, which randomly allocated district-level hospitals into treatment group and control group, was conducted. Setting Sixteen district-level hospitals in Kilimanjaro and Manyara regions of Tanzania. Participants Outpatient exit surveys targeting totally 3292 individuals, 1688 in the treatment and 1604 in the control group, from 3 time-points between September 2011 and September 2012. Intervention Implementation of the 5S (Sort, Set, Shine, Standardize, Sustain) approach as a CQI method at outpatient departments over 12 months. Main outcome measures Cleanliness, waiting time, patient's experience, patient's satisfaction. Results The 5S increased cleanliness in the outpatient department, patients' subjective waiting time and overall satisfaction. However, negligible effects were confirmed for patient's experiences on hospital staff behaviours. Conclusions The 5S as a CQI method is effective in enhancing hospital environment and service delivery; that are subjectively assessed by outpatients even during the short intervention period. Nevertheless, continuous efforts will be needed to connect CQI practices with the further improvement in the delivery of quality health care.
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Affiliation(s)
- Yusuke Kamiya
- Ryukoku University, Faculty of Economics, Kyoto, Japan
| | | | | | | | | | - Eleuter Samky
- Mbeya Consultant Hospital, Ministry of Health and Social Welfare, Mbeya, Tanzania
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Kamiya Y, Akpalu B, Mahama E, Ayipah EK, Owusu-Agyei S, Hodgson A, Shibanuma A, Kikuchi K, Jimba M. The gender gap in relation to happiness and preferences in married couples after childbirth: evidence from a field experiment in rural Ghana. J Health Popul Nutr 2017; 36:8. [PMID: 28298243 PMCID: PMC5353885 DOI: 10.1186/s41043-017-0084-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 03/05/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND How does the gap in preferences between married couples affect their happiness after childbirth? Are couples that share similar preferences happier? In recent years, gender, marriage, and happiness have been considered to be key issues in public health research. Although much research has examined the happiness status of married couples, practically no study has explored the gender gap in relation to happiness and the preferences of married couples after childbirth. Therefore, our study was conducted to assess the association between the preference gap and the happiness status among married couples in the afterbirth period. METHODS We conducted a field experiment in rural communities in the Brong-Ahafo region of Ghana. Participants were 80 married couples who had experienced childbirth within 2 years prior to the survey. As preference indicators, we measured trust, reciprocity, altruism, and risk lovingness through an economic experiment. Then, we assessed how, for a couple, the gap between these preferences affected their happiness. RESULTS Wives' happiness was positively associated with the absolute value of the gap in risk lovingness between a couple (OR = 4.83, p = 0.08), while husbands' happiness was negatively associated with the gap in trust (OR = -3.58, p = 0.04) or altruism (OR = -3.33, p = 0.02). Within a couple, wives felt greater happiness than their husbands if there was a wider gap in trust (OR = 6.22, p = 0.01), reciprocity (OR = 2.80, p = 0.01), or risk lovingness (OR = 3.81, p = 0.07). CONCLUSIONS The gender gaps in the preference indicators were found to be closely associated with the happiness levels between married couples after childbirth. For the further improvement of maternal and child health, we must consider the gender gaps between couples in relation to happiness and preferences.
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Affiliation(s)
- Yusuke Kamiya
- Faculty of Economics, Ryukoku University, 67 Tsukamoto-cho, Fukakusa, Fushimi-ku, Kyoto City, 612-8577 Japan
| | - Bright Akpalu
- Kintampo Health Research Centre, P.O. Box 200, Kintampo, Brong-Ahafo Ghana
| | - Emmanuel Mahama
- Kintampo Health Research Centre, P.O. Box 200, Kintampo, Brong-Ahafo Ghana
| | | | - Seth Owusu-Agyei
- Kintampo Health Research Centre, P.O. Box 200, Kintampo, Brong-Ahafo Ghana
| | - Abraham Hodgson
- Research and Development Division, Ghana Health Service, MB 190 Accra, Ghana
| | - Akira Shibanuma
- Department of Community and Global Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033 Japan
| | - Kimiyo Kikuchi
- Institute of Decision Science for a Sustainable Society (IDS3), Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka City, 8128582 Japan
| | - Masamine Jimba
- Department of Community and Global Health, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033 Japan
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Kamiya Y, Yamaki T, Uchida M, Hatanaka T, Kimura M, Ogihara M, Morimoto Y, Natsume H. Preparation and Evaluation of PEGylated Poly-L-ornithine Complex as a Novel Absorption Enhancer. Biol Pharm Bull 2017; 40:205-211. [PMID: 28154261 DOI: 10.1248/bpb.b16-00781] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Polycationic compounds, such as poly-L-arginine and poly-L-ornithine (PLO), enhance the nasal absorption of hydrophilic macromolecular drugs. However, the bio availability corresponding to the dose of these enhancers has not been obtained in an open system study, where an administered solution is transferred to the pharynx because they do not exhibit mucoadhesion/retention in the nasal cavity. In this study, we prepared PEGylated-poly-L-ornithine (PEG-PLO) and investigated the effects of PEGylation on in vitro adhesion/retention properties, permeation enhancement efficiency, and cytotoxicity. PEG-PLO bearing 3-4 polyethylene glycol (PEG) chains per PLO molecule was more retentive than unmodified PLO on an inclined plate. The permeability of a model drug, FD-4, across Caco-2 cell sheets was enhanced by PEG-PLO as well as by PLO. PLO showed cytotoxicity at high concentrations, whereas PEG-PLO did not decrease cell viability, even above the concentration giving a sufficient enhancement effect. These findings suggest that PEGylation of polycationic absorption enhancers improves their adhesion/retention and decreases their cytotoxicity, which may lead to enhancers with greater utility.
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Affiliation(s)
- Yusuke Kamiya
- Faculty of Pharmaceutical Sciences, Josai University
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Koyama Y, Kamiya Y, Moro K, Miura K, Nagahashi M, Tatsuda K, Tsuchida J, Nakajima M, Toshikawa C, Ikarashi M, Sakata J, Kobayashi T, Kameyama H, Baba H, Wakai T. MON-P247: Efficacy of Pectoral Nerves Block at Breast Cancer Surgery for Maintaining Postoperative Appetite: A Prospective Double-Blinded Randomaized Controlled Study. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30881-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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45
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Ma J, Kamiya Y, Hong T, Cao HB, Ehlers G, Tian W, Batista CD, Dun ZL, Zhou HD, Matsuda M. Static and Dynamical Properties of the Spin-1/2 Equilateral Triangular-Lattice Antiferromagnet Ba_{3}CoSb_{2}O_{9}. Phys Rev Lett 2016; 116:087201. [PMID: 26967439 DOI: 10.1103/physrevlett.116.087201] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Indexed: 06/05/2023]
Abstract
We present single-crystal neutron scattering measurements of the spin-1/2 equilateral triangular-lattice antiferromagnet Ba_{3}CoSb_{2}O_{9}. Besides confirming that the Co^{2+} magnetic moments lie in the ab plane for zero magnetic field and then determining all the exchange parameters of the minimal quasi-2D spin Hamiltonian, we provide conclusive experimental evidence of magnon decay through observation of intrinsic line broadening. Through detailed comparisons with the linear and nonlinear spin-wave theories, we also point out that the large-S approximation, which is conventionally employed to predict magnon decay in noncollinear magnets, is inadequate to explain our experimental observation. Thus, our results call for a new theoretical framework for describing excitation spectra in low-dimensional frustrated magnets under strong quantum effects.
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Affiliation(s)
- J Ma
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Y Kamiya
- iTHES Research Group and Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - Tao Hong
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - H B Cao
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - G Ehlers
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - W Tian
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - C D Batista
- Theoretical Division, T-4 and CNLS, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Z L Dun
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - H D Zhou
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310-3706, USA
| | - M Matsuda
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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Kamiya Y, Itagaki K, Tani M, Kim GN, Komamiya S. Constraints on new gravitylike forces in the nanometer range. Phys Rev Lett 2015; 114:161101. [PMID: 25955041 DOI: 10.1103/physrevlett.114.161101] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Indexed: 06/04/2023]
Abstract
We report on a new constraint on gravitylike short-range forces, in which the interaction charge is mass, obtained by measuring the angular distribution of 5 Å neutrons scattering off atomic xenon gas. Around 10^{7} scattering events were collected at the 40 m small angle neutron scattering beam line located at the HANARO research reactor of the Korean Atomic Energy Research Institute. The extracted coupling strengths of new forces in the Yukawa-type parametrization are g[over ^]^{2}=(0.2±6.8±2.0)×10^{-15} GeV^{-2} and g[over ^]^{2}=(-5.3±9.0_{-2.8}^{+2.7})×10^{-17} GeV^{-2} for interaction ranges of 0.1 and 1.0 nm, respectively. These strengths correspond to 95% confidence level limits of g^{2}<(1.4±0.2)×10^{-14} GeV^{-2} and g^{2}<(1.3±0.2)×10^{-16} GeV^{-2}, improving the current limits for interaction ranges between 4 and 0.04 nm by a factor of up to 10.
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Affiliation(s)
- Y Kamiya
- International Center for Elementary Particle Physics and Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - K Itagaki
- International Center for Elementary Particle Physics and Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - M Tani
- International Center for Elementary Particle Physics and Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - G N Kim
- Department of Physics, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - S Komamiya
- International Center for Elementary Particle Physics and Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
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Chen J, Kamiya Y, Polur I, Xu M, Choi T, Kalajzic Z, Drissi H, Wadhwa S. Estrogen via estrogen receptor beta partially inhibits mandibular condylar cartilage growth. Osteoarthritis Cartilage 2014; 22:1861-8. [PMID: 25046534 PMCID: PMC4252977 DOI: 10.1016/j.joca.2014.07.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 07/01/2014] [Accepted: 07/10/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE Temporomandibular joint (TMJ) diseases predominantly afflict women, suggesting a role for female hormones in the disease process. However, little is known about the role of estrogen receptor (ER) signaling in regulating mandibular condylar cartilage growth. Therefore, the goal of this study was to examine the effects of altered estrogen levels on the mandibular condylar cartilage in wild type (WT) and ER beta Knockout (KO) mice. MATERIALS AND METHODS 21-day-old female WT (n = 37) and ER beta KO mice (n = 36) were either sham operated or ovariectomized, and treated with either placebo or estradiol. The mandibular condylar cartilage was evaluated by histomorphometry, proliferation was analyzed by double ethynyl-2'-deoxyuridine/bromodeoxyuridine (EdU/BrdU) labeling, and assays on gene and protein expression of chondrocyte maturation markers were performed. RESULTS In WT mice, ovariectomy caused a significant increase in mandibular condylar cartilage cell numbers, a significant increase in Sox9 expression and a significant increase in proliferation compared with sham operated WT mice. In contrast, ovariectomy did not cause any of these effects in the ER beta KO mice. Estrogen replacement treatment in ovariectomized WT mice caused a significant decrease in ER alpha expression and a significant increase in Sost expression compared with ovariectomized mice treated with placebo. Estrogen replacement treatment in ovariectomized ER beta KO mice caused a significant increase in Col2 expression, no change in ER alpha expression, and a significant increase in Sost expression. CONCLUSION Estrogen via ER beta inhibits proliferation and ER alpha expression while estrogen independent of ER beta induces Col2 and Sost expression.
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Affiliation(s)
- J. Chen
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY, USA
| | - Y. Kamiya
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY, USA
| | - I. Polur
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY, USA
| | - M. Xu
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY, USA
| | - T. Choi
- Columbia University College of Dental Medicine, New York, NY, USA
| | - Z. Kalajzic
- Division of Orthodontics, School of Dental Medicine, University of Connecticut Health Center, Farmington, CT, USA
| | - H. Drissi
- Department of Orthopedic Surgery, University of Connecticut Health Center, Farmington, CT, USA
| | - S. Wadhwa
- Division of Orthodontics, Columbia University College of Dental Medicine, New York, NY, USA
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Masumoto S, Yamamoto T, Ohkado A, Yoshimatsu S, Querri AG, Kamiya Y. Prevalence and associated factors of depressive state among pulmonary tuberculosis patients in Manila, The Philippines. Int J Tuberc Lung Dis 2014; 18:174-9. [PMID: 24429309 DOI: 10.5588/ijtld.13.0335] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
SETTING Both depression and tuberculosis (TB) are global public health problems that have a substantial impact on human health. However, depressive state among TB patients has not been well investigated in the Philippines. OBJECTIVE To assess depressive state among pulmonary tuberculosis (PTB) patients and to identify factors associated with depressive state in Manila, the Philippines. DESIGN A cross-sectional survey of PTB patients was conducted at 10 public health centres and two non-government organisation clinics providing directly observed treatment in District I, Tondo, Manila. Face-to-face interviews with 561 PTB patients using a structured questionnaire were conducted. RESULTS Depressive state was observed in 16.8% of the participants. Logistic regression analysis indicated that body mass index < 18.5 kg/m(2), marital status of cohabitation compared with married, four or more symptoms, four or more adverse drug reactions, grade 3 or higher on the Medical Research Council dyspnoea scale and low perceived confidant social support were significantly associated with depressive state. CONCLUSION Depressive state among PTB patients in economically depressed areas is common, and screening for depression in the primary care setting can identify patients who need support and treatment, especially for malnourished patients and those with poor social support.
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Affiliation(s)
- S Masumoto
- Graduate School of International Health Development, Nagasaki University, Nagasaki, Japan
| | - T Yamamoto
- Graduate School of International Health Development, Nagasaki University, Nagasaki, Japan
| | - A Ohkado
- Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association Philippines Inc, Manila, The Philippines; Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Kiyose, Japan
| | - S Yoshimatsu
- Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association Philippines Inc, Manila, The Philippines; Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association, Kiyose, Japan
| | - A G Querri
- Research Institute of Tuberculosis, Japan Anti-Tuberculosis Association Philippines Inc, Manila, The Philippines
| | - Y Kamiya
- Graduate School of International Health Development, Nagasaki University, Nagasaki, Japan
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Ichikawa G, Komamiya S, Kamiya Y, Minami Y, Tani M, Geltenbort P, Yamamura K, Nagano M, Sanuki T, Kawasaki S, Hino M, Kitaguchi M. Observation of the spatial distribution of gravitationally bound quantum states of ultracold neutrons and its derivation using the Wigner function. Phys Rev Lett 2014; 112:071101. [PMID: 24579585 DOI: 10.1103/physrevlett.112.071101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Indexed: 06/03/2023]
Abstract
Ultracold neutrons (UCNs) can be bound by the potential of terrestrial gravity and a reflecting mirror. The wave function of the bound state has characteristic modulations. We carried out an experiment to observe the vertical distribution of the UCNs above such a mirror at the Institut Laue-Langevin in 2011. The observed modulation is in good agreement with that prediction by quantum mechanics using the Wigner function. The spatial resolution of the detector system is estimated to be 0.7 μm. This is the first observation of gravitationally bound states of UCNs with submicron spatial resolution.
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Affiliation(s)
- G Ichikawa
- Department of Physics, Graduate School of Science, and International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - S Komamiya
- Department of Physics, Graduate School of Science, and International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Y Kamiya
- Department of Physics, Graduate School of Science, and International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Y Minami
- Department of Physics, Graduate School of Science, and International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - M Tani
- Department of Physics, Graduate School of Science, and International Center for Elementary Particle Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - P Geltenbort
- Institut Laue-Langevin, BP 156, 6, rue Jules Horowitz, 38042 Grenoble Cedex 9, France
| | - K Yamamura
- Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M Nagano
- Research Center for Ultra-Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - T Sanuki
- Department of Physics, Graduate School of Science, Tohoku University, 6-3, Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - S Kawasaki
- High Energy Accelerator Research Organization, Institute of Particle and Nuclear Studies, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - M Hino
- Kyoto University Research Reactor Institute, 2, Asahiro-Nishi, Kumatori-cho, Sennan-gun, Osaka 590-0494, Japan
| | - M Kitaguchi
- Department of Physics, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
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50
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White GR, Ainsworth R, Akagi T, Alabau-Gonzalvo J, Angal-Kalinin D, Araki S, Aryshev A, Bai S, Bambade P, Bett DR, Blair G, Blanch C, Blanco O, Blaskovic-Kraljevic N, Bolzon B, Boogert S, Burrows PN, Christian G, Corner L, Davis MR, Faus-Golfe A, Fukuda M, Gao J, García-Morales H, Geffroy N, Hayano H, Heo AY, Hildreth M, Honda Y, Huang JY, Hwang WH, Iwashita Y, Jang S, Jeremie A, Kamiya Y, Karataev P, Kim ES, Kim HS, Kim SH, Kim YI, Komamiya S, Kubo K, Kume T, Kuroda S, Lam B, Lekomtsev K, Liu S, Lyapin A, Marin E, Masuzawa M, McCormick D, Naito T, Nelson J, Nevay LJ, Okugi T, Omori T, Oroku M, Park H, Park YJ, Perry C, Pfingstner J, Phinney N, Rawankar A, Renier Y, Resta-López J, Ross M, Sanuki T, Schulte D, Seryi A, Shevelev M, Shimizu H, Snuverink J, Spencer C, Suehara T, Sugahara R, Takahashi T, Tanaka R, Tauchi T, Terunuma N, Tomás R, Urakawa J, Wang D, Warden M, Wendt M, Wolski A, Woodley M, Yamaguchi Y, Yamanaka T, Yan J, Yokoya K, Zimmermann F. Experimental validation of a novel compact focusing scheme for future energy-frontier linear lepton colliders. Phys Rev Lett 2014; 112:034802. [PMID: 24484144 DOI: 10.1103/physrevlett.112.034802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Indexed: 06/03/2023]
Abstract
A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed in 2001 [P. Raimondi and A. Seryi, Phys. Rev. Lett. 86, 3779 (2001)]. This scheme has many advantageous properties over previously studied focusing schemes, including being significantly shorter for a given energy and having a significantly better energy bandwidth. Experimental results from the ATF2 accelerator at KEK are presented that validate the operating principle of such a scheme by demonstrating the demagnification of a 1.3 GeV electron beam down to below 65 nm in height using an energy-scaled version of the compact focusing optics designed for the ILC collider.
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Affiliation(s)
- G R White
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - R Ainsworth
- John Adams Institute for Accelerator Science at Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom
| | - T Akagi
- Department of Physics, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - J Alabau-Gonzalvo
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland
| | - D Angal-Kalinin
- CLRC: Daresbury Laboratory, Daresbury, Warrington, Cheshire WA4 4AD, United Kingdom
| | - S Araki
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - A Aryshev
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - S Bai
- Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS), Beijing, China
| | - P Bambade
- LAL, Universite Paris-Sud, CNRS/IN2P3, Orsay, France
| | - D R Bett
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - G Blair
- John Adams Institute for Accelerator Science at Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom and Science and Technology Facilities Council, Polaris House, North Star Avenue, Swindon SN2 1SZ, United Kingdom
| | - C Blanch
- Universidad de Valencia - Instituto de Física Corpuscular (IFC), Edificio Institutos de Investigación, c/ Catedrático José Beltrán, 2, E-46980 Paterna, Spain
| | - O Blanco
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland and LAL, Universite Paris-Sud, CNRS/IN2P3, Orsay, France
| | - N Blaskovic-Kraljevic
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - B Bolzon
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland and CLRC: Daresbury Laboratory, Daresbury, Warrington, Cheshire WA4 4AD, United Kingdom and Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Oxford St., Liverpool L69 3BX, United Kingdom
| | - S Boogert
- John Adams Institute for Accelerator Science at Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom
| | - P N Burrows
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - G Christian
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - L Corner
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - M R Davis
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - A Faus-Golfe
- Universidad de Valencia - Instituto de Física Corpuscular (IFC), Edificio Institutos de Investigación, c/ Catedrático José Beltrán, 2, E-46980 Paterna, Spain
| | - M Fukuda
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - J Gao
- Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS), Beijing, China
| | - H García-Morales
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland and Universitat Politécnica de Catalunya, BarcelonaTech, C. Jordi Girona, 31. 08034 Barcelona, Spain
| | - N Geffroy
- LAPP-Universite de Savoie-CNRS/IN2P3, Annecy-le-Vieux, France
| | - H Hayano
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - A Y Heo
- Department of Physics, Kyungpook National University, 1370 San Kyuk-dong, Puk ku, Taegu 635, South Korea
| | - M Hildreth
- University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Y Honda
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - J Y Huang
- Pohang Accelerator Laboratory, POSTECH (Pohang University of Science and Technology), San-31 Hyoja-dong, Pohang 790-784, South Korea
| | - W H Hwang
- Pohang Accelerator Laboratory, POSTECH (Pohang University of Science and Technology), San-31 Hyoja-dong, Pohang 790-784, South Korea
| | - Y Iwashita
- Institute for Chemical Research (ICR), Nuclear Science Research Facility, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - S Jang
- Department of Physics, Kyungpook National University, 1370 San Kyuk-dong, Puk ku, Taegu 635, South Korea
| | - A Jeremie
- LAPP-Universite de Savoie-CNRS/IN2P3, Annecy-le-Vieux, France
| | - Y Kamiya
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - P Karataev
- John Adams Institute for Accelerator Science at Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom
| | - E S Kim
- Department of Physics, Kyungpook National University, 1370 San Kyuk-dong, Puk ku, Taegu 635, South Korea
| | - H S Kim
- Department of Physics, Kyungpook National University, 1370 San Kyuk-dong, Puk ku, Taegu 635, South Korea
| | - S H Kim
- Pohang Accelerator Laboratory, POSTECH (Pohang University of Science and Technology), San-31 Hyoja-dong, Pohang 790-784, South Korea
| | - Y I Kim
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - S Komamiya
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - K Kubo
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - T Kume
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - S Kuroda
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - B Lam
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - K Lekomtsev
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - S Liu
- LAL, Universite Paris-Sud, CNRS/IN2P3, Orsay, France
| | - A Lyapin
- John Adams Institute for Accelerator Science at Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom
| | - E Marin
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - M Masuzawa
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - D McCormick
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - T Naito
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - J Nelson
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - L J Nevay
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom and John Adams Institute for Accelerator Science at Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom
| | - T Okugi
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - T Omori
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - M Oroku
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - H Park
- Department of Physics, Kyungpook National University, 1370 San Kyuk-dong, Puk ku, Taegu 635, South Korea
| | - Y J Park
- Pohang Accelerator Laboratory, POSTECH (Pohang University of Science and Technology), San-31 Hyoja-dong, Pohang 790-784, South Korea
| | - C Perry
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - J Pfingstner
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland
| | - N Phinney
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - A Rawankar
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Y Renier
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland
| | - J Resta-López
- Universidad de Valencia - Instituto de Física Corpuscular (IFC), Edificio Institutos de Investigación, c/ Catedrático José Beltrán, 2, E-46980 Paterna, Spain
| | - M Ross
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - T Sanuki
- Tohoku University, 28 Kawauchi, Aoba-ku, Sendai, 980-8576 Japan
| | - D Schulte
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland
| | - A Seryi
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - M Shevelev
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - H Shimizu
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - J Snuverink
- John Adams Institute for Accelerator Science at Royal Holloway University of London, Egham Hill, Egham, Surrey TW20 0EX, United Kingdom
| | - C Spencer
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - T Suehara
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - R Sugahara
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - T Takahashi
- Department of Physics, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - R Tanaka
- Department of Physics, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
| | - T Tauchi
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - N Terunuma
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - R Tomás
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland
| | - J Urakawa
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - D Wang
- Institute of High Energy Physics (IHEP), Chinese Academy of Sciences (CAS), Beijing, China
| | - M Warden
- John Adams Institute for Accelerator Science at University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, United Kingdom
| | - M Wendt
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland
| | - A Wolski
- Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Oxford St., Liverpool L69 3BX, United Kingdom
| | - M Woodley
- SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025-7090, USA
| | - Y Yamaguchi
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - T Yamanaka
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - J Yan
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan
| | - K Yokoya
- High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - F Zimmermann
- European Organization for Nuclear Research (CERN), CH-1211 Geneva 23, Switzerland
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