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Takano S, Tomita N, Niwa M, Torii A, Takaoka T, Okazaki D, Kita N, Uchiyama K, Imai M, Ayakawa S, Iida M, Tsuzuki Y, Otsuka S, Manabe Y, Nomura K, Ogawa Y, Miyakawa A, Miyamoto A, Yasui T, Hiwatashi A. Effects of Radiation Doses on Clinical Recurrence in Patients with Biochemically Recurrent Prostate Cancer after Prostatectomy. Int J Radiat Oncol Biol Phys 2023; 117:e444. [PMID: 37785436 DOI: 10.1016/j.ijrobp.2023.06.1623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Salvage radiotherapy (SRT) to the prostate bed is the only curative treatment for patients with biochemical recurrence (BCR) after radical prostatectomy (RP). Although several systematic reviews indicated that a dose escalation in the range of 60-70 Gy improved biochemical control, the effects of radiation doses on clinical relapse after SRT remain unclear. Our aim was to investigate the relationship between radiation doses and clinical relapse-free survival (cRFS) after SRT. MATERIALS/METHODS We identified 295 eligible patients receiving SRT for biochemically recurrent prostate cancer after RP between 2005 and 2018 at 15 institutions. Sixteen patients (5%) received short-term (< 6 months) androgen deprivation therapy (ADT) following RP and/or concurrently with SRT. SRT was delivered to the prostate and seminal vesicle bed using photon beams at a median (range) dose of 66 Gy (61-85) in 1.8-3.0 Gy fractions. The primary outcome was cRFS. Clinical relapse was identified on radiological imaging and/or biopsy and included local recurrence, lymph node metastasis, and distant metastasis. In all analyses, doses were recalculated as an equivalent dose in 2-Gy fractions (EQD2) with α/β = 1.5 Gy. Clinical RFS between the EQD2 ≥ 66 Gy (n = 229) and EQD2 < 66 Gy (n = 66) groups were compared using the Log-rank test, followed by univariate and multivariate Cox regression analyses and a subgroup analysis. RESULTS The median follow-up duration was 73 months. Among patients with BCR (n = 119), 79 of 96 (82%) in the EQD2 ≥ 66 Gy group and 21 of 23 (91%) in the EQD2 < 66 Gy group received second salvage ADT (p = 0.36). Among all patients (n = 295), clinical relapse was identified in 22 (7%) patients after SRT. Six-year biochemical relapse-free survival (bRFS), cRFS, cancer-specific survival (CSS), and overall survival (OS) rates were 58%, 93%, 98%, and 94%, respectively. Six-year cRFS rates were 94% (95% confidence interval [CI], 90-97) in the EQD2 ≥ 66 Gy group and 87% (95% CI, 75-93) in the EQD2 < 66 Gy group (p = 0.020). The multivariate analysis revealed that EQD2 < 66 Gy, Gleason score ≥ 8, seminal vesicle involvement, and PSA at BCR ≥ 0.5 ng/ml correlated with clinical relapse (p = 0.0016, 0.014, 0.011, and 0.027, respectively). The subgroup analysis showed the consistent benefit of EQD2 ≥ 66 Gy in patients across most subgroups including PSA at BCR after RP, extracapsular extension, and age at SRT. CONCLUSION This large multi-institutional observational study demonstrated that a higher SRT dose (EQD2 ≥ 66 Gy) resulted in superior cRFS. The present result supports the dose recommendations in the 2023 National Comprehensive Cancer Network guidelines (64-72 Gy) even in terms of clinical relapse. Prospective trial is warranted to investigate an upper threshold for optimal SRT dose.
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Affiliation(s)
- S Takano
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - N Tomita
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - M Niwa
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - A Torii
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - T Takaoka
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - D Okazaki
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - N Kita
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - K Uchiyama
- Department of Radiology, Kariya-Toyota general hospital, Nagoya, Japan
| | - M Imai
- Department of Radiology, Japanese Red Cross Aichi Medical Center Nagoya Daini Hospital, Nagoya, Japan
| | - S Ayakawa
- Department of Radiology, Japan Community Healthcare Organization Chukyo Hospital, Nagoya, Japan
| | - M Iida
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan; Department of Radiation Oncology, Suzuka General Hospital, Suzuka, Japan
| | - Y Tsuzuki
- Department of Radiation Oncology, Nagoya Proton Therapy Center, Nagoya City University West Medical Center, Nagoya, Japan
| | - S Otsuka
- Department of Radiology, Okazaki City Hospital, Okazaki, Japan
| | - Y Manabe
- Department of Radiation Oncology, Nanbu Tokushukai Hospital, Okinawa, Japan
| | - K Nomura
- Department of Radiotherapy, Nagoya City West Medical Center, Nagoya, Japan
| | - Y Ogawa
- Department of Radiation Oncology, Kasugai Municipal Hospital, Kasugai, Japan
| | - A Miyakawa
- Department of Radiation Oncology, National Hospital Organization Nagoya Medical Center, Nagoya, Japan
| | - A Miyamoto
- Department of Radiation Oncology, Hokuto Hospital, Obihiro, Japan
| | - T Yasui
- Department of Urology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - A Hiwatashi
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
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Kurth WS, Sulaiman AH, Hospodarsky GB, Menietti JD, Mauk BH, Clark G, Allegrini F, Valek P, Connerney JEP, Waite JH, Bolton SJ, Imai M, Santolik O, Li W, Duling S, Saur J, Louis C. Juno Plasma Wave Observations at Ganymede. Geophys Res Lett 2022; 49:e2022GL098591. [PMID: 37034392 PMCID: PMC10078157 DOI: 10.1029/2022gl098591] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 04/22/2022] [Accepted: 04/27/2022] [Indexed: 06/19/2023]
Abstract
The Juno Waves instrument measured plasma waves associated with Ganymede's magnetosphere during its flyby on 7 June, day 158, 2021. Three distinct regions were identified including a wake, and nightside and dayside regions in the magnetosphere distinguished by their electron densities and associated variability. The magnetosphere includes electron cyclotron harmonic emissions including a band at the upper hybrid frequency, as well as whistler-mode chorus and hiss. These waves likely interact with energetic electrons in Ganymede's magnetosphere by pitch angle scattering and/or accelerating the electrons. The wake is accentuated by low-frequency turbulence and electrostatic solitary waves. Radio emissions observed before and after the flyby likely have their source in Ganymede's magnetosphere.
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Affiliation(s)
- W. S. Kurth
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | - A. H. Sulaiman
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | | | - J. D. Menietti
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | - B. H. Mauk
- The Johns Hopkins University Applied Physics LaboratoryLaurelMDUSA
| | - G. Clark
- The Johns Hopkins University Applied Physics LaboratoryLaurelMDUSA
| | - F. Allegrini
- Southwest Research InstituteSan AntonioTXUSA
- Department of Physics and AstronomyUniversity of Texas at San AntonioSan AntonioTXUSA
| | - P. Valek
- Southwest Research InstituteSan AntonioTXUSA
| | | | - J. H. Waite
- Southwest Research InstituteSan AntonioTXUSA
| | | | - M. Imai
- Department of Electrical Engineering and Information ScienceNational Institute of Technology (KOSEN), Niihama CollegeNiihamaJapan
| | - O. Santolik
- Department of Space PhysicsInstitute of Atmospheric Physics of the Czech Academy of SciencesPragueCzechia
- Faculty of Mathematics and PhysicsCharles UniversityPragueCzechia
| | - W. Li
- Center for Space PhysicsBoston UniversityBostonMAUSA
| | - S. Duling
- Institute of Geophysics and MeteorologyUniversity of CologneCologneGermany
| | - J. Saur
- Institute of Geophysics and MeteorologyUniversity of CologneCologneGermany
| | - C. Louis
- School of Cosmic Physics, DIAS Dunsink ObservatoryDublin Institute for Advanced StudiesDublinIreland
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3
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Rimini M, Rimassa L, Ueshima K, Burgio V, Shigeo S, Tada T, Suda G, Yoo C, Cheon J, Pinato DJ, Lonardi S, Scartozzi M, Iavarone M, Di Costanzo GG, Marra F, Soldà C, Tamburini E, Piscaglia F, Masi G, Cabibbo G, Foschi FG, Silletta M, Pressiani T, Nishida N, Iwamoto H, Sakamoto N, Ryoo BY, Chon HJ, Claudia F, Niizeki T, Sho T, Kang B, D'Alessio A, Kumada T, Hiraoka A, Hirooka M, Kariyama K, Tani J, Atsukawa M, Takaguchi K, Itobayashi E, Fukunishi S, Tsuji K, Ishikawa T, Tajiri K, Ochi H, Yasuda S, Toyoda H, Ogawa C, Nishimur T, Hatanaka T, Kakizaki S, Shimada N, Kawata K, Tanaka T, Ohama H, Nouso K, Morishita A, Tsutsui A, Nagano T, Itokawa N, Okubo T, Arai T, Imai M, Naganuma A, Koizumi Y, Nakamura S, Joko K, Iijima H, Hiasa Y, Pedica F, De Cobelli F, Ratti F, Aldrighetti L, Kudo M, Cascinu S, Casadei-Gardini A. Atezolizumab plus bevacizumab versus lenvatinib or sorafenib in non-viral unresectable hepatocellular carcinoma: an international propensity score matching analysis. ESMO Open 2022; 7:100591. [PMID: 36208496 PMCID: PMC9808460 DOI: 10.1016/j.esmoop.2022.100591] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/21/2022] [Accepted: 08/22/2022] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND A growing body of evidence suggests that non-viral hepatocellular carcinoma (HCC) might benefit less from immunotherapy. MATERIALS AND METHODS We carried out a retrospective analysis of prospectively collected data from consecutive patients with non-viral advanced HCC, treated with atezolizumab plus bevacizumab, lenvatinib, or sorafenib, in 36 centers in 4 countries (Italy, Japan, Republic of Korea, and UK). The primary endpoint was overall survival (OS) with atezolizumab plus bevacizumab versus lenvatinib. Secondary endpoints were progression-free survival (PFS) with atezolizumab plus bevacizumab versus lenvatinib, and OS and PFS with atezolizumab plus bevacizumab versus sorafenib. For the primary and secondary endpoints, we carried out the analysis on the whole population first, and then we divided the cohort into two groups: non-alcoholic fatty liver disease (NAFLD)/non-alcoholic steatohepatitis (NASH) population and non-NAFLD/NASH population. RESULTS One hundred and ninety patients received atezolizumab plus bevacizumab, 569 patients received lenvatinib, and 210 patients received sorafenib. In the whole population, multivariate analysis showed that treatment with lenvatinib was associated with a longer OS [hazard ratio (HR) 0.65; 95% confidence interval (CI) 0.44-0.95; P = 0.0268] and PFS (HR 0.67; 95% CI 0.51-0.86; P = 0.002) compared to atezolizumab plus bevacizumab. In the NAFLD/NASH population, multivariate analysis confirmed that lenvatinib treatment was associated with a longer OS (HR 0.46; 95% CI 0.26-0.84; P = 0.0110) and PFS (HR 0.55; 95% CI 0.38-0.82; P = 0.031) compared to atezolizumab plus bevacizumab. In the subgroup of non-NAFLD/NASH patients, no difference in OS or PFS was observed between patients treated with lenvatinib and those treated with atezolizumab plus bevacizumab. All these results were confirmed following propensity score matching analysis. By comparing patients receiving atezolizumab plus bevacizumab versus sorafenib, no statistically significant difference in survival was observed. CONCLUSIONS The present analysis conducted on a large number of advanced non-viral HCC patients showed for the first time that treatment with lenvatinib is associated with a significant survival benefit compared to atezolizumab plus bevacizumab, in particular in patients with NAFLD/NASH-related HCC.
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Affiliation(s)
- M Rimini
- IRCCS San Raffaele Scientific Institute Hospital, Department of Oncology, Vita-Salute San Raffaele University, Milan, Italy
| | - L Rimassa
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; Medical Oncology and Hematology Unit, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, Milan, Italy
| | - K Ueshima
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Higashi-Osaka, Japan
| | - V Burgio
- IRCCS San Raffaele Scientific Institute Hospital, Department of Oncology, Vita-Salute San Raffaele University, Milan, Italy
| | - S Shigeo
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - T Tada
- Department of Internal Medicine, Japanese Red Cross Himeji Hospital, Himeji, Japan
| | - G Suda
- Department of Gastroenterology and Hepatology, Hokkaido, Japan; University Graduate School of Medicine, Sapporo, Japan
| | - C Yoo
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - J Cheon
- Department of Medical Oncology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - D J Pinato
- Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK; Department of Translational Medicine, Università degli Studi del Piemonte Orientale, Novara, Italy
| | - S Lonardi
- Oncology Unit 3, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - M Scartozzi
- Medical Oncology, University and University Hospital of Cagliari, Cagliari, Italy
| | - M Iavarone
- Division of Gastroenterology and Hepatology, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano, Milan, Italy
| | | | - F Marra
- Dipartimento di Medicina Sperimentale e Clinica, Università di Firenze, Firenze, Italy
| | - C Soldà
- Oncology Unit 1, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - E Tamburini
- Department of Oncology and Palliative Care, Cardinale Hospital, Naples, Italy
| | - F Piscaglia
- Division of Internal Medicine, Hepatobiliary and Immunoallergic Disease, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - G Masi
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Pisa, Italy; Unit of Medical Oncology 2, Azienda Ospedaliero-Universitaria Pisana, Pisa, Italy
| | - G Cabibbo
- Section of Gastroenterology & Hepatology, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, PROMISE, University of Palermo, Palermo, Italy
| | - F G Foschi
- Internal Medicine, Infermi Hospital, Faenza (AUSL ROMAGNA), Ravenna, Italy
| | - M Silletta
- Division of Medical Oncology, Policlinico Universitario Campus Bio-Medico, Rome, Italy
| | - T Pressiani
- Medical Oncology and Hematology Unit, Humanitas Cancer Center, IRCCS Humanitas Research Hospital, Milan, Italy
| | - N Nishida
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Higashi-Osaka, Japan
| | - H Iwamoto
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - N Sakamoto
- Department of Gastroenterology and Hepatology, Hokkaido, Japan; University Graduate School of Medicine, Sapporo, Japan
| | - B-Y Ryoo
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - H J Chon
- Department of Medical Oncology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - F Claudia
- Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK; Department of Translational Medicine, Università degli Studi del Piemonte Orientale, Novara, Italy
| | - T Niizeki
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Japan
| | - T Sho
- Department of Gastroenterology and Hepatology, Hokkaido, Japan; University Graduate School of Medicine, Sapporo, Japan
| | - B Kang
- Department of Medical Oncology, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Republic of Korea
| | - A D'Alessio
- Department of Surgery & Cancer, Imperial College London, Hammersmith Hospital, London, UK; Department of Translational Medicine, Università degli Studi del Piemonte Orientale, Novara, Italy
| | - T Kumada
- Department of Nursing, Gifu Kyoritsu University, Ogaki, Japan
| | - A Hiraoka
- Gastroenterology Center, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - M Hirooka
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - K Kariyama
- Department of Gastroenterology, Okayama City Hospital, Okayama, Japan
| | - J Tani
- Department of Gastroenterology and Hepatology, Kagawa University, Kagawa, Japan
| | - M Atsukawa
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - K Takaguchi
- Department of Hepatology, Kagawa Prefectural Central Hospital, Takamatsu, Japan
| | - E Itobayashi
- Department of Gastroenterology, Asahi General Hospital, Asahi, Japan
| | - S Fukunishi
- Premier Departmental Research of Medicine, Osaka Medical and Pharmaceutical University, Shinya Fukunishi, Osaka, Japan
| | - K Tsuji
- Center of Gastroenterology, Teine Keijinkai Hospital, Sapporo, Japan
| | - T Ishikawa
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - K Tajiri
- Department of Gastroenterology, Toyama University Hospital, Toyama, Japan
| | - H Ochi
- Hepato-biliary Center, Japanese Red Cross Matsuyama Hospital, Matsuyama, Japan
| | - S Yasuda
- Department of Gastroenterology and Hepatology, Ogaki Municipal Hospital, Ogaki, Japan
| | - H Toyoda
- Department of Gastroenterology and Hepatology, Ogaki Municipal Hospital, Ogaki, Japan
| | - C Ogawa
- Department of Gastroenterology, Japanese Red Cross Takamatsu Hospital, Takamatsu, Japan
| | - T Nishimur
- Department of Internal medicine, Division of Gastroenterology and Hepatology, Hyogo College of Medicine, Nishinomiya, Japan
| | - T Hatanaka
- Department of Gastroenterology, Gunma Saiseikai Maebashi Hospital, Maebashi, Japan
| | - S Kakizaki
- Department of Clinical Research, National Hospital Organization Takasaki General Medical Center, Takasaki, Japan
| | - N Shimada
- Division of Gastroenterology and Hepatology, Otakanomori Hospital, Kashiwa, Japan
| | - K Kawata
- Department of Hepatology, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - T Tanaka
- Gastroenterology Center, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - H Ohama
- Premier Departmental Research of Medicine, Osaka Medical and Pharmaceutical University, Shinya Fukunishi, Osaka, Japan
| | - K Nouso
- Department of Gastroenterology, Okayama City Hospital, Okayama, Japan
| | - A Morishita
- Department of Gastroenterology and Hepatology, Kagawa University, Kagawa, Japan
| | - A Tsutsui
- Department of Hepatology, Kagawa Prefectural Central Hospital, Takamatsu, Japan
| | - T Nagano
- Department of Hepatology, Kagawa Prefectural Central Hospital, Takamatsu, Japan
| | - N Itokawa
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - T Okubo
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - T Arai
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - M Imai
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - A Naganuma
- Department of Gastroenterology, National Hospital Organization Takasaki General Medical Center, Takasaki, Japan
| | - Y Koizumi
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - S Nakamura
- Department of Internal Medicine, Japanese Red Cross Himeji Hospital, Himeji, Japan
| | - K Joko
- Hepato-biliary Center, Japanese Red Cross Matsuyama Hospital, Matsuyama, Japan
| | - H Iijima
- Department of Internal medicine, Division of Gastroenterology and Hepatology, Hyogo College of Medicine, Nishinomiya, Japan
| | - Y Hiasa
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Ehime, Japan
| | - F Pedica
- Department of Experimental Oncology, Pathology Unit, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - F De Cobelli
- School of Medicine, Vita-Salute San Raffaele University, Milan, Italy
| | - F Ratti
- Hepatobiliary Surgery Division, Liver Center, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - L Aldrighetti
- Hepatobiliary Surgery Division, Liver Center, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - M Kudo
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Higashi-Osaka, Japan
| | - S Cascinu
- Department of Oncology, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute Hospital, Milan, Italy
| | - A Casadei-Gardini
- Department of Oncology, Vita-Salute San Raffaele University, IRCCS San Raffaele Scientific Institute Hospital, Milan, Italy.
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Takeuchi K, Ikeda Y, Senda M, Harada A, Okuwaki K, Fukuzawa K, Nakagawa S, Yu HY, Nagase L, Imai M, Sasaki M, Lo YH, Ito D, Osaka N, Fujii Y, Sasaki AT, Senda T. The GTP responsiveness of PI5P4Kβ evolved from a compromised trade-off between activity and specificity. Structure 2022; 30:886-899.e4. [PMID: 35504278 PMCID: PMC9177683 DOI: 10.1016/j.str.2022.04.004] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/22/2021] [Accepted: 04/06/2022] [Indexed: 10/18/2022]
Abstract
Unlike most kinases, phosphatidylinositol 5-phosphate 4-kinase β (PI5P4Kβ) utilizes GTP as a physiological phosphate donor and regulates cell growth under stress (i.e., GTP-dependent stress resilience). However, the genesis and evolution of its GTP responsiveness remain unknown. Here, we reveal that PI5P4Kβ has acquired GTP preference by generating a short dual-nucleotide-recognizing motif called the guanine efficient association (GEA) motif. Comparison of nucleobase recognition with 660 kinases and 128 G proteins has uncovered that most kinases and PI5P4Kβ use their main-chain atoms for adenine recognition, while the side-chain atoms are required for guanine recognition. Mutational analysis of the GEA motif revealed that the acquisition of GTP reactivity is accompanied by an extended activity toward inosine triphosphate (ITP) and xanthosine triphosphate (XTP). Along with the evolutionary analysis data that point to strong negative selection of the GEA motif, these results suggest that the GTP responsiveness of PI5P4Kβ has evolved from a compromised trade-off between activity and specificity, underpinning the development of the GTP-dependent stress resilience.
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Affiliation(s)
- Koh Takeuchi
- Molecular Profiling Research Center for Drug Discovery and Cellular Molecular Biotechnology Research Institute, National Institute of Advanced Science and Technology, Aomi, Koto, Tokyo 135-0063, Japan; Graduate School of Pharmacological Sciences, The University of Tokyo, Hongo, Bunkyo, Tokyo 113-0033, Japan.
| | - Yoshiki Ikeda
- Division of Hematology and Oncology, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Miki Senda
- Structural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Ayaka Harada
- Structural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Koji Okuwaki
- Department of Chemistry and Research Center for Smart Molecules, Rikkyo University, Toshima, Tokyo 171-8501, Japan
| | - Kaori Fukuzawa
- School of Pharmacy and Pharmaceutical Sciences, Hoshi University, Shinagawa, Tokyo 142-8501, Japan
| | - So Nakagawa
- Department of Molecular Life Sciences, Tokai University School of Medicine, Isehara, Kanagawa 259-1193, Japan
| | - Hong Yang Yu
- Division of Hematology and Oncology, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; Structural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Lisa Nagase
- Structural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Misaki Imai
- Molecular Profiling Research Center for Drug Discovery and Cellular Molecular Biotechnology Research Institute, National Institute of Advanced Science and Technology, Aomi, Koto, Tokyo 135-0063, Japan; Graduate School of Pharmacological Sciences, The University of Tokyo, Hongo, Bunkyo, Tokyo 113-0033, Japan
| | - Mika Sasaki
- Division of Hematology and Oncology, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Yu-Hua Lo
- Structural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Doshun Ito
- Structural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan
| | - Natsuki Osaka
- Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata 997-0052, Japan
| | - Yuki Fujii
- Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi, Osaka 558-8585, Japan
| | - Atsuo T Sasaki
- Division of Hematology and Oncology, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; Department of Cancer Biology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA; Institute for Advanced Biosciences, Keio University, Tsuruoka, Yamagata 997-0052, Japan; Department of Neurosurgery, Brain Tumor Center at UC Gardner Neuroscience Institute, Cincinnati, OH 45267, USA.
| | - Toshiya Senda
- Structural Biology Research Center, Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan; Department of Accelerator Science, School of High Energy Accelerator Science, SOKENDAI (The Graduate University for Advanced Studies), Oho, Tsukuba, Ibaraki 305-0801, Japan; Faculty of Pure and Applied Sciences, University of Tsukuba, Tennodai, Ibaraki 305-8571, Japan.
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Rimini M, Kudo M, Tada T, Shigeo S, Kang W, Suda G, Jefremow A, Burgio V, Iavarone M, Tortora R, Marra F, Lonardi S, Tamburini E, Piscaglia F, Masi G, Cabibbo G, Foschi FG, Silletta M, Kumada T, Iwamoto H, Aoki T, Goh MJ, Sakamoto N, Siebler J, Hiraoka A, Niizeki T, Ueshima K, Sho T, Atsukawa M, Hirooka M, Tsuji K, Ishikawa T, Takaguchi K, Kariyama K, Itobayashi E, Tajiri K, Shimada N, Shibata H, Ochi H, Yasuda S, Toyoda H, Fukunishi S, Ohama H, Kawata K, Tani J, Nakamura S, Nouso K, Tsutsui A, Nagano T, Takaaki T, Itokawa N, Okubo T, Arai T, Imai M, Joko K, Koizumi Y, Hiasa Y, Cucchetti A, Ratti F, Aldrighetti L, Cascinu S, Casadei-Gardini A. Nonalcoholic steatohepatitis in hepatocarcinoma: new insights about its prognostic role in patients treated with lenvatinib. ESMO Open 2021; 6:100330. [PMID: 34847382 PMCID: PMC8710492 DOI: 10.1016/j.esmoop.2021.100330] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 10/31/2021] [Accepted: 11/03/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) treatment remains a big challenge in the field of oncology. The liver disease (viral or not viral) underlying HCC turned out to be crucial in determining the biologic behavior of the tumor, including its response to treatment. The aim of this analysis was to investigate the role of the etiology of the underlying liver disease in survival outcomes. PATIENTS AND METHODS We conducted a multicenter retrospective study on a large cohort of patients treated with lenvatinib as first-line therapy for advanced HCC from both Eastern and Western institutions. Univariate and multivariate analyses were performed. RESULTS Among the 1232 lenvatinib-treated HCC patients, 453 (36.8%) were hepatitis C virus positive, 268 hepatitis B virus positive (21.8%), 236 nonalcoholic steatohepatitis (NASH) correlate (19.2%) and 275 had other etiologies (22.3%). The median progression-free survival (mPFS) was 6.2 months [95% confidence interval (CI) 5.9-6.7 months] and the median overall survival (mOS) was 15.8 months (95% CI 14.9-17.2 months). In the univariate analysis for OS NASH-HCC was associated with longer mOS [22.2 versus 15.1 months; hazard ratio (HR) 0.69; 95% CI 0.56-0.85; P = 0.0006]. In the univariate analysis for PFS NASH-HCC was associated with longer mPFS (7.5 versus 6.5 months; HR 0.84; 95% CI 0.71-0.99; P = 0.0436). The multivariate analysis confirmed NASH-HCC (HR 0.64; 95% CI 0.48-0.86; P = 0.0028) as an independent prognostic factor for OS, along with albumin-bilirubin (ALBI) grade, extrahepatic spread, neutrophil-to-lymphocyte ratio, portal vein thrombosis, Eastern Cooperative Oncology Group (ECOG) performance status and alpha-fetoprotein. An interaction test was performed between sorafenib and lenvatinib cohorts and the results highlighted the positive predictive role of NASH in favor of the lenvatinib arm (P = 0.0047). CONCLUSION NASH has been identified as an independent prognostic factor in a large cohort of patients with advanced HCC treated with lenvatinib, thereby suggesting the role of the etiology in the selection of patients for tyrosine kinase treatment. If validated, this result could provide new insights useful to improve the management of these patients.
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Affiliation(s)
- M Rimini
- Department of Oncology and Hematology, Division of Oncology, University of Modena and Reggio Emilia, Modena, Italy
| | - M Kudo
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Higashi-osaka, Japan
| | - T Tada
- Department of Internal Medicine, Japanese Red Cross Himeji Hospital, Himeji, Japan
| | - S Shigeo
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - W Kang
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea; Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology (SAIHST), Sungkyunkwan University, Seoul, Korea
| | - G Suda
- Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - A Jefremow
- Department of Medicine 1, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nuremberg, Erlangen, Germany; Deutsches Zentrum Immuntherapie (DZI), Erlangen, Germany
| | - V Burgio
- Department of Oncology, IRCCS San Raffaele Scientific Institute Hospital, Milan, Italy
| | - M Iavarone
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico di Milano, Division of Gastroenterology and Hepatology, Milan, Italy
| | - R Tortora
- Liver Unit, Department of Transplantation, Cardarelli Hospital, Naples, Italy
| | - F Marra
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - S Lonardi
- Medical Oncology Unit 3, Department of Oncology, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - E Tamburini
- Department of Medical Oncology, Card. G. Panico Hospital of Tricase, Tricase, Italy
| | - F Piscaglia
- Division of Internal Medicine, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy
| | - G Masi
- Unit of Medical Oncology, Pisa University Hospital, Pisa, Italy
| | - G Cabibbo
- Section of Gastroenterology & Hepatology, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, PROMISE, University of Palermo, Palermo, Italy
| | - F G Foschi
- Azienda Unità Sanitaria della Romagna, Ospedale degli Infermi, Faenza, Italy
| | - M Silletta
- Medical Oncology Unit, University Campus Bio-Medico, Rome, Italy
| | - T Kumada
- Faculty of Nursing, Gifu Kyoritsu University, Ogaki, Japan
| | - H Iwamoto
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - T Aoki
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Higashi-osaka, Japan
| | - M J Goh
- Department of Medicine, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - N Sakamoto
- Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - J Siebler
- Department of Medicine 1, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nuremberg, Erlangen, Germany; Deutsches Zentrum Immuntherapie (DZI), Erlangen, Germany
| | - A Hiraoka
- Gastroenterology Center, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - T Niizeki
- Division of Gastroenterology, Department of Medicine, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - K Ueshima
- Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Higashi-osaka, Japan
| | - T Sho
- Department of Gastroenterology and Hepatology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - M Atsukawa
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - M Hirooka
- Department of Gastroenterology and Metabology, Ehime University Graduate School of Medicine, Matsuyama, Japan
| | - K Tsuji
- Center of Gastroenterology, Teine Keijinkai Hospital, Sapporo, Japan
| | - T Ishikawa
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - K Takaguchi
- Department of Hepatology, Kagawa Prefectural Central Hospital, Takamatsu, Japan
| | - K Kariyama
- Department of Gastroenterology, Okayama City Hospital, Okayama, Japan
| | - E Itobayashi
- Department of Gastroenterology, Asahi General Hospital, Asahi, Japan
| | - K Tajiri
- Department of Gastroenterology, Toyama University Hospital, Toyama, Japan
| | - N Shimada
- Division of Gastroenterology and Hepatology, Otakanomori Hospital, Kashiwa, Japan
| | - H Shibata
- Department of Gastroenterology, Tokushima Prefectural Central Hospital, Tokushima, Japan
| | - H Ochi
- Hepato-biliary Center, Matsuyama Red Cross Hospital, Matsuyama, Japan
| | - S Yasuda
- Department of Gastroenterology and Hepatology, Ogaki Municipal Hospital, Ogaki, Japan
| | - H Toyoda
- Department of Gastroenterology and Hepatology, Ogaki Municipal Hospital, Ogaki, Japan
| | - S Fukunishi
- Second Department of Internal Medicine, Osaka Medical College, Takatsuki, Japan
| | - H Ohama
- Second Department of Internal Medicine, Osaka Medical College, Takatsuki, Japan
| | - K Kawata
- Hepatology Division, Department of Internal Medicine, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - J Tani
- Department of Gastroenterology and Neurology, Kagawa University School of Medicine, Kagawa, Japan
| | - S Nakamura
- Department of Internal Medicine, Japanese Red Cross Himeji Hospital, Himeji, Japan
| | - K Nouso
- Department of Gastroenterology, Okayama City Hospital, Okayama, Japan
| | - A Tsutsui
- Department of Hepatology, Kagawa Prefectural Central Hospital, Takamatsu, Japan
| | - T Nagano
- Department of Hepatology, Kagawa Prefectural Central Hospital, Takamatsu, Japan
| | - T Takaaki
- Gastroenterology Center, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - N Itokawa
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - T Okubo
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - T Arai
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Nippon Medical School, Tokyo, Japan
| | - M Imai
- Department of Gastroenterology, Saiseikai Niigata Hospital, Niigata, Japan
| | - K Joko
- Gastroenterology Center, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - Y Koizumi
- Gastroenterology Center, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - Y Hiasa
- Gastroenterology Center, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - A Cucchetti
- Department of Medical and Surgical Sciences-DIMEC, Alma Mater Studiorum - University of Bologna, Bologna, Italy; Department of Surgery, Morgagni - Pierantoni Hospital, Forlì, Italy
| | - F Ratti
- Hepatobiliary Surgery Division, IRCCS San Raffaele Scientific Institute, Milan, Italy
| | - L Aldrighetti
- Hepatobiliary Surgery Division, IRCCS San Raffaele Scientific Institute, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy
| | - S Cascinu
- Vita-Salute San Raffaele University, Milan, Italy; Department of Oncology, IRCCS San Raffaele Scientific Institute Hospital, Milan, Italy
| | - A Casadei-Gardini
- Department of Oncology, IRCCS San Raffaele Scientific Institute Hospital, Milan, Italy; Vita-Salute San Raffaele University, Milan, Italy.
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Kage H, Sunami K, Naito Y, Amano T, Ennishi D, Imai M, Kanai M, Kenmotsu H, Komine K, Koyama T, T. M, Morita S, Saigusa Y, Sakai D, Yamanaka T, Kohsaka S, Tsuchihara K, Yoshino T. 519MO Concordance analysis of treatment recommendations between central consensus and multidisciplinary tumor boards. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1041] [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: 11/16/2022] Open
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7
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Komine K, Sunami K, Naito Y, Amano T, Ennishi D, Imai M, Kage H, Kanai M, Kenmotsu H, Koyama T, T. M, Morita S, Sakai D, Kohsaka S, Tsuchihara K, Saigusa Y, Yamanaka T, Yoshino T. 551P Chronological improvement in precision oncology implementation in Japan. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1073] [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: 10/20/2022] Open
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Takaishi A, Kisinoue T, Mori H, Yoshino T, Yamaji T, Yasuhara K, Tanimoto M, Kagawa K, Onishi N, Imai M, Ueeda M. Our unique clinical pathway for congestive heart failure cases required admission achieved a dramatic reduction of their hospitalization period and a significant reduction of readmission with heart fa. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
In recent years, the number of elderly congestive heart failure (CHF) cases has been increasing in Japan with the aging of the population. This tendency is particularly remarkable in rural areas where our facilities are located. After admission with CHF, the hospitalization period (PE) was prolonged due to various complications unique to the elderly, and re-exacerbation of CHF occurred shortly after discharge. Approximately 30% of them were readmitted within one year. From August 2015, for shortening of PE and reduction of CHF readmission through the efficiency of CHF treatment and comprehensive patient education, we had introduced a unique clinical pathway (PATH) that provided the immediate use of Tolvaptan and comprehensive education by multi-disciplinary staff after admission.
Purpose
In this study, we verified whether the improvement of clinical prognosis were achieved by introduction of PATH.
Methods
Between April 2014 and July 2019, 635 CHF cases (764 admissions) ware enrolled. We divided them to two groups, N-group before introducing PATH (198 cases, 262 admissions) and P-group applied PATH (437 cases, 502 admission). Between both groups, we compared the various acute care situation, PE and readmission rate with CHF within 1 year after discharge.
Results
There were no differences between P and N-group in mean age, distribution of underlying illness or daily activity level before admission. There ware not also differences about left ventricle function by echocardiography and various blood test data at admission. The enforcement rate of continuous infusion and the rate of urinary catheter placement were significantly lower in the P-group (71 vs 88%; p<0.0001, 52 vs 63%; p<0.01, respectively). And their enforcement duration was significantly shorter in P-group (4.6±5.3 vs 10.5±9.6 days; p<0.0001, 6.3±7.9 vs 12.8±13.1 days; p<0.0001 respectively). The enforcement rate of cardiac rehabilitation was significantly higher in group P (94 vs 84%; p<0.0001), and the starting time of rehabilitation was significantly earlier (2.9±1.5 vs 6.3±4.8th illness day; p<0.0001). As a result, the average HP was significantly shorter in group P (16.5±13.4 vs 28.6±24.1 days, p<0.0001). The readmission rate with CHF within one year after discharge was significantly lower in group P (23 vs 36%; p<0.001).
Conclusion
By the introduction of our original clinical pathway for congestive heart failure, the efficiency of medical care was achieved and the mean hospitalization period was widely shortened. In addition, by the through comprehensive patient education by multi-disciplinary staff involved in the pathway, the self-restraint life style after discharge seemed to be maintained and the readmission with worsening of heart failure was significantly suppressed.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
| | | | - H Mori
- Mitoyo General Hospital, Kanonji, Japan
| | - T Yoshino
- Mitoyo General Hospital, Kanonji, Japan
| | - T Yamaji
- Mitoyo General Hospital, Kanonji, Japan
| | | | | | - K Kagawa
- Mitoyo General Hospital, Kanonji, Japan
| | - N Onishi
- Mitoyo General Hospital, Kanonji, Japan
| | - M Imai
- Mitoyo General Hospital, Kanonji, Japan
| | - M Ueeda
- Ueeda cardiovasculal clinic, Toyonaka, Japan
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9
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Mizukoshi Y, Takeuchi K, Tokunaga Y, Matsuo H, Imai M, Fujisaki M, Kamoshida H, Takizawa T, Hanzawa H, Shimada I. Targeting the cryptic sites: NMR-based strategy to improve protein druggability by controlling the conformational equilibrium. Sci Adv 2020; 6:eabd0480. [PMID: 32998885 PMCID: PMC7527212 DOI: 10.1126/sciadv.abd0480] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
Cryptic ligand binding sites, which are not evident in the unligated structures, are beneficial in tackling with difficult but attractive drug targets, such as protein-protein interactions (PPIs). However, cryptic sites have thus far not been rationally pursued in the early stages of drug development. Here, we demonstrated by nuclear magnetic resonance that the cryptic site in Bcl-xL exists in a conformational equilibrium between the open and closed conformations under the unligated condition. While the fraction of the open conformation in the unligated wild-type Bcl-xL is estimated to be low, F143W mutation that is distal from the ligand binding site can substantially elevate the population. The F143W mutant showed a higher hit rate in a phage-display peptide screening, and the hit peptide bound to the cryptic site of the wild-type Bcl-xL. Therefore, by controlling the conformational equilibrium in the cryptic site, the opportunity to identify a PPI inhibitor could be improved.
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Affiliation(s)
| | - Koh Takeuchi
- National Institute of Advanced Industrial Science and Technology (AIST), Molecular Profiling Research Center for Drug Discovery (molprof) and Cellular and Molecular Biotechnology Research Institute, Tokyo 135-0063, Japan.
| | - Yuji Tokunaga
- National Institute of Advanced Industrial Science and Technology (AIST), Molecular Profiling Research Center for Drug Discovery (molprof) and Cellular and Molecular Biotechnology Research Institute, Tokyo 135-0063, Japan
| | - Hitomi Matsuo
- Japan Biological Informatics Consortium, Tokyo 135-0063, Japan
| | - Misaki Imai
- Japan Biological Informatics Consortium, Tokyo 135-0063, Japan
| | - Miwa Fujisaki
- Japan Biological Informatics Consortium, Tokyo 135-0063, Japan
| | | | | | | | - Ichio Shimada
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Tokyo 113-0033, Japan.
- RIKEN, Center for Biosystems Dynamics Research, Yokohama 230-0045, Japan
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10
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Saito M, Imai M, Wake D, Higaki R, Nakao Y, Sumimoto T, Yokomoto Y, Ogimoto A, Suzuki M, Kawakami H, Hiasa G, Okayama H, Inoue K, Ikeda S, Yamaguchi O. Semiquantitative assessment of the relative apical sparing pattern of longitudinal strain for cardiac amyloidosis identification. Echocardiography 2020; 37:1422-1429. [PMID: 32860644 DOI: 10.1111/echo.14833] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 04/17/2020] [Revised: 07/17/2020] [Accepted: 08/01/2020] [Indexed: 01/28/2023] Open
Abstract
BACKGROUNDS The relative apical sparing pattern (RASP) of left ventricular (LV) longitudinal strain (LS) is frequently associated with cardiac amyloidosis (CA). However, the visual assessment of RASP is inconsistent, and the quantitative assessment of RASP is time-consuming. This study aimed to compare assessments of RASP for the identification of CA with conventional assessments and investigate their reproducibility and relevance on the assessments. METHODS Forty patients with biopsy-proven CA were compared with 80 hypertrophied patients matched for mean LV wall thickness. We compared the discriminative abilities of three assessments of RASP to identify CA (visual, quantitative, and semiquantitative). Nine patterns of semiquantitative RASP were investigated; finally, it was defined as "reduction of LS" (≥ -10%) in ≥5 (of 6) basal segments, relative to "preserved LS" (< -15%) in at least one apical segment. RESULTS The concordance between the two observers for visual RASP was modest (κ = 0.65). On the other hand, the consistency for semiquantitative RASP was perfect (κ = 1.00). The discriminative ability of semiquantitative RASP (area under the curve [AUC] = 0.74) was significantly better than that of visual RASP (AUC = 0.65) and equivalent to that of binary quantitative RASP. CONCLUSION Semiquantitative RASP assessment is reproducible and accurately discriminates CA. This simple assessment may help readily refine the risk stratification of patients with diffuse LV hypertrophy.
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Affiliation(s)
- Makoto Saito
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Misaki Imai
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Daisuke Wake
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Rieko Higaki
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Yasuhisa Nakao
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan.,Department of Cardiology, Ehime University Graduate School of Medicine, Toon, Japan
| | | | - Yuki Yokomoto
- Department of Cardiology, Uwajima City Hospital, Uwajima, Japan
| | | | - Moeko Suzuki
- Department of Cardiology, Ehime Prefectural Imabari Hospital, Imabari, Japan
| | - Hideo Kawakami
- Department of Cardiology, Ehime Prefectural Imabari Hospital, Imabari, Japan
| | - Go Hiasa
- Department of Cardiology, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - Hideki Okayama
- Department of Cardiology, Ehime Prefectural Central Hospital, Matsuyama, Japan
| | - Katsuji Inoue
- Department of Cardiology, Ehime University Graduate School of Medicine, Toon, Japan
| | - Shuntaro Ikeda
- Department of Cardiology, Ehime University Graduate School of Medicine, Toon, Japan
| | - Osamu Yamaguchi
- Department of Cardiology, Ehime University Graduate School of Medicine, Toon, Japan
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11
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Saito M, Imai M, Wake D, Higaki R, Nakao Y, Morioka H, Sumimoto T, Inoue K. Prognostic assessment of relative apical sparing pattern of longitudinal strain for severe aortic valve stenosis. Int J Cardiol Heart Vasc 2020; 29:100551. [PMID: 32529023 PMCID: PMC7280361 DOI: 10.1016/j.ijcha.2020.100551] [Citation(s) in RCA: 5] [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: 03/12/2020] [Revised: 05/22/2020] [Accepted: 05/28/2020] [Indexed: 01/15/2023]
Abstract
Backgrounds The relative apical sparing pattern (RASP) of left ventricular (LV) longitudinal strain (LS) is frequently associated with cardiac amyloidosis. Elderly patients with aortic valve stenosis (AS) complicated by transthyretin amyloid cardiomyopathy have poor prognosis. Furthermore, deteriorated basal LS in AS patients has been reported to be associated with adverse outcome. We investigated the association between RASP and outcomes in patients with severe AS. Methods We retrospectively studied 156 consecutive patients with severe AS and preserved LV ejection fraction. RASP was assessed by both of semi-quantitative (sRASP) and quantitative (qRASP) methods. sRASP was defined as a deterioration of LS (≥-10%) in ≥ 5 (of 6) basal segments, relative to preserved LS (<-15%) in at least 1 apical segment. qRASP was calculated using the following formula: average apical LS/(average basal LS + average mid-ventricle LS); qRASP ≥ 1 was defined as positive. Patients were followed up to determine outcomes, which included sudden cardiac death or unexpected admission due to heart failure, over a median of 1.9 years. Results sRASP and qRASP were assessed in all patients, but 24 and 42 patients fulfilled the criteria for sRASP and qRASP, respectively. Both assessments were significantly associated with outcomes (n = 44; 28%). Furthermore, sRASP was significantly associated with outcome after adjusting for EuroSCORE, NYHA ≥ II, or global longitudinal strain. A model based on these covariates for predicting outcomes significantly improved by adding sRASP. Conclusion RASP is observed in some patients with severe AS and provides additive prognostic information over conventional parameters.
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Affiliation(s)
- Makoto Saito
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Misaki Imai
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Daisuke Wake
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Rieko Higaki
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | - Yasuhisa Nakao
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan.,Department of Cardiology, Ehime University Graduate School of Medicine, Toon, Japan
| | - Hiroe Morioka
- Department of Cardiology, Kitaishikai Hospital, Ozu, Japan
| | | | - Katsuji Inoue
- Department of Cardiology, Ehime University Graduate School of Medicine, Toon, Japan
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12
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Maruyama Y, Koroku S, Imai M, Takeuchi K, Mitsutake A. Mutation-induced change in chignolin stability from π-turn to α-turn. RSC Adv 2020; 10:22797-22808. [PMID: 35514567 PMCID: PMC9054626 DOI: 10.1039/d0ra01148g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 02/06/2020] [Accepted: 05/20/2020] [Indexed: 11/21/2022] Open
Abstract
A mutation from threonine to proline at the eighth residue in chignolin changes π-turn to α-turn.
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Affiliation(s)
- Yutaka Maruyama
- Architecture Development Team
- FLAGSHIP 2020 Project
- RIKEN Center for Computational Science
- Kobe 650-0047
- Japan
| | - Shunpei Koroku
- Department of Physics
- School of Science and Technology
- Meiji University
- Kawasaki-shi
- Japan
| | - Misaki Imai
- Cellular and Molecular Biotechnology Research Institute
- National Institute of Advanced Industrial Science and Technology
- Koto
- Japan
| | - Koh Takeuchi
- Cellular and Molecular Biotechnology Research Institute
- National Institute of Advanced Industrial Science and Technology
- Koto
- Japan
| | - Ayori Mitsutake
- Department of Physics
- School of Science and Technology
- Meiji University
- Kawasaki-shi
- Japan
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13
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Saito M, Imai M, Wake D, Higaki R, Sumimoto T, Inaba S. P305Prognostic value of relative apical sparing pattern of longitudinal strain in patients with severe aortic stenosis. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
The relative apical sparing pattern (RASP) of left ventricular longitudinal strain (LS) is determined on the strain polar map, while global longitudinal strain (GLS) is measured using speckle-tracking echocardiography and is frequently associated with cardiac amyloidosis (CA). According to recent reports, some elderly patients with aortic stenosis (AS) suffer from transthyretin CA and have a poor prognosis. Accordingly, we aimed to investigate the association of RASP and outcome of patients with severe AS.
Methods
We retrospectively studied 157 consecutive patients (age: 81±10 years, 33% men) with severe AS (mean transaortic pressure gradient: 49 mmHg) and preserved ejection fraction (>50%). After measuring GLS, RASP was semi-quantitatively and quantitatively assessed. Semi-quantitative RASP (sRASP) was defined as reduction of LS (more than −10%), showing light red or blue in ≥5 segments out of the basal six segments, relative to apical LS (less than −15%) showing red. This analysis was independently performed in a blinded manner by two observers. Quantitative RASP (qRASP) was calculated using the following formula: average apical LS/(average basal LS + average mid-ventricle LS), then qRASP ≥1 was determined as positive according to the previous paper. Patients were followed up to determine their outcomes, i.e., sudden cardiac death or unexpected admission due to heart failure over a median duration of 1.9 years. Concordance of sRASP was assessed using the kappa statistic, and a Cox proportional hazards model was used to assess the association between the parameters and primary outcome.
Results
The consistency in the observations of the two sonographers in identifying sRASP was found to be excellent (κ = 1.00). sRASP and qRASP were observed in 24 (15%) and 42 (27%) patients, respectively, and were significantly associated with the primary outcome (n=44; 28%). The representative case is shown in figure (left panel). Further, positive sRASP was associated with the outcome after adjusting for the Euro score, NYHA ≥II, and GLS (hazard ratio = 2.69, p=0.01). The model based on these covariates significantly improved following the addition of sRASP (Figure; right panel). In addition, sRASP was observed in four patients out of 50 patients who underwent aortic valve replacement. Of these, one patient had the primary outcome (25%). On the other hand, in the remaining 46 patients without sRASP, four patients had the outcome (9%).
Figure 1
Conclusions
RASP was observed in some patients with severe AS and has been shown to have increasing importance in predicting adverse cardiac events in such patients.
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Affiliation(s)
- M Saito
- Kitaishikai Hospital, Ozu, Japan
| | - M Imai
- Kitaishikai Hospital, Ozu, Japan
| | - D Wake
- Kitaishikai Hospital, Ozu, Japan
| | - R Higaki
- Kitaishikai Hospital, Ozu, Japan
| | | | - S Inaba
- Kitaishikai Hospital, Ozu, Japan
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14
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Mizuno T, Tomita N, Uchiyama K, Sugie C, Imai M, Ayakawa S, Niwa M, Matsui T, Otsuka S, Manabe Y, Nomura K, Kondo T, Kosaki K, Akifumi M, Miyamoto A, Takemoto S, Yasui T, Shibamoto Y. Impact of Early Salvage Radiotherapy in Patients with Biochemical Recurrence after Radical Prostatectomy: Results of a Multi-institutional Retrospective Study. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1843] [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: 11/15/2022]
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15
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Yamazaki S, Odanaka M, Shime H, Imai M, Hemmi H, Kaisho T, Ohkura N, Sakaguchi S, Morita A. 051 Dermal dendritic cells present neo-self antigens induced by ultraviolet B exposure to expand Foxp3+ regulatory T cells. J Invest Dermatol 2019. [DOI: 10.1016/j.jid.2019.03.127] [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: 11/16/2022]
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16
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Ebert RW, Greathouse TK, Clark G, Allegrini F, Bagenal F, Bolton SJ, Connerney JEP, Gladstone GR, Imai M, Hue V, Kurth WS, Levin S, Louarn P, Mauk BH, McComas DJ, Paranicas C, Szalay JR, Thomsen MF, Valek PW, Wilson RJ. Comparing Electron Energetics and UV Brightness in Jupiter's Northern Polar Region During Juno Perijove 5. Geophys Res Lett 2019; 46:19-27. [PMID: 30828110 PMCID: PMC6378591 DOI: 10.1029/2018gl081129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/14/2018] [Accepted: 12/20/2018] [Indexed: 05/24/2023]
Abstract
We compare electron and UV observations mapping to the same location in Jupiter's northern polar region, poleward of the main aurora, during Juno perijove 5. Simultaneous peaks in UV brightness and electron energy flux are identified when observations map to the same location at the same time. The downward energy flux during these simultaneous observations was not sufficient to generate the observed UV brightness; the upward energy flux was. We propose that the primary acceleration region is below Juno's altitude, from which the more intense upward electrons originate. For the complete interval, the UV brightness peaked at ~240 kilorayleigh (kR); the downward and upward energy fluxes peaked at 60 and 700 mW/m2, respectively. Increased downward energy fluxes are associated with increased contributions from tens of keV electrons. These observations provide evidence that bidirectional electron beams with broad energy distributions can produce tens to hundreds of kilorayleigh polar UV emissions.
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Affiliation(s)
- R. W. Ebert
- Southwest Research InstituteSan AntonioTXUSA
- Department of Physics and AstronomyUniversity of Texas at San AntonioSan AntonioTXUSA
| | | | - G. Clark
- Johns Hopkins University Applied Physics LabLaurelMDUSA
| | - F. Allegrini
- Southwest Research InstituteSan AntonioTXUSA
- Department of Physics and AstronomyUniversity of Texas at San AntonioSan AntonioTXUSA
| | - F. Bagenal
- Laboratory for Atmospheric and Space PhysicsUniversity of Colorado BoulderBoulderCOUSA
| | | | | | - G. R. Gladstone
- Southwest Research InstituteSan AntonioTXUSA
- Department of Physics and AstronomyUniversity of Texas at San AntonioSan AntonioTXUSA
| | - M. Imai
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | - V. Hue
- Southwest Research InstituteSan AntonioTXUSA
| | - W. S. Kurth
- Department of Physics and AstronomyUniversity of IowaIowa CityIAUSA
| | - S. Levin
- Jet Propulsion LaboratoryPasadenaCAUSA
| | - P. Louarn
- Institut de Recherche en Astrophysique et PlanétologieToulouseFrance
| | - B. H. Mauk
- Johns Hopkins University Applied Physics LabLaurelMDUSA
| | - D. J. McComas
- Southwest Research InstituteSan AntonioTXUSA
- Department of Astrophysical SciencesPrinceton UniversityPrincetonNJUSA
| | - C. Paranicas
- Johns Hopkins University Applied Physics LabLaurelMDUSA
| | - J. R. Szalay
- Department of Astrophysical SciencesPrinceton UniversityPrincetonNJUSA
| | | | - P. W. Valek
- Southwest Research InstituteSan AntonioTXUSA
| | - R. J. Wilson
- Laboratory for Atmospheric and Space PhysicsUniversity of Colorado BoulderBoulderCOUSA
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17
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Ebert RW, Greathouse TK, Clark G, Allegrini F, Bagenal F, Bolton SJ, Connerney JEP, Gladstone GR, Imai M, Hue V, Kurth WS, Levin S, Louarn P, Mauk BH, McComas DJ, Paranicas C, Szalay JR, Thomsen MF, Valek PW, Wilson RJ. Comparing Electron Energetics and UV Brightness in Jupiter's Northern Polar Region During Juno Perijove 5. Geophys Res Lett 2019; 46:19-27. [PMID: 30828110 DOI: 10.1029/2019gl084146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/14/2018] [Accepted: 12/20/2018] [Indexed: 05/24/2023]
Abstract
We compare electron and UV observations mapping to the same location in Jupiter's northern polar region, poleward of the main aurora, during Juno perijove 5. Simultaneous peaks in UV brightness and electron energy flux are identified when observations map to the same location at the same time. The downward energy flux during these simultaneous observations was not sufficient to generate the observed UV brightness; the upward energy flux was. We propose that the primary acceleration region is below Juno's altitude, from which the more intense upward electrons originate. For the complete interval, the UV brightness peaked at ~240 kilorayleigh (kR); the downward and upward energy fluxes peaked at 60 and 700 mW/m2, respectively. Increased downward energy fluxes are associated with increased contributions from tens of keV electrons. These observations provide evidence that bidirectional electron beams with broad energy distributions can produce tens to hundreds of kilorayleigh polar UV emissions.
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Affiliation(s)
- R W Ebert
- Southwest Research Institute San Antonio TX USA
- Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA
| | | | - G Clark
- Johns Hopkins University Applied Physics Lab Laurel MD USA
| | - F Allegrini
- Southwest Research Institute San Antonio TX USA
- Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA
| | - F Bagenal
- Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
| | - S J Bolton
- Southwest Research Institute San Antonio TX USA
| | | | - G R Gladstone
- Southwest Research Institute San Antonio TX USA
- Department of Physics and Astronomy University of Texas at San Antonio San Antonio TX USA
| | - M Imai
- Department of Physics and Astronomy University of Iowa Iowa City IA USA
| | - V Hue
- Southwest Research Institute San Antonio TX USA
| | - W S Kurth
- Department of Physics and Astronomy University of Iowa Iowa City IA USA
| | - S Levin
- Jet Propulsion Laboratory Pasadena CA USA
| | - P Louarn
- Institut de Recherche en Astrophysique et Planétologie Toulouse France
| | - B H Mauk
- Johns Hopkins University Applied Physics Lab Laurel MD USA
| | - D J McComas
- Southwest Research Institute San Antonio TX USA
- Department of Astrophysical Sciences Princeton University Princeton NJ USA
| | - C Paranicas
- Johns Hopkins University Applied Physics Lab Laurel MD USA
| | - J R Szalay
- Department of Astrophysical Sciences Princeton University Princeton NJ USA
| | | | - P W Valek
- Southwest Research Institute San Antonio TX USA
| | - R J Wilson
- Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA
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18
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Taguchi S, Oguchi M, Motoko Y, Suzuki R, Ejima Y, Hasegawa M, Ishibashi N, Isobe K, Kasuya T, Sasai K, Shimoda E, Soejima T, Imai M. The Primary Tumor Invasion and Soluble Interleukin-2 Receptor As Prognostic Factors for Localized Nasal NK/T-Cell Lymphoma: The Multi-Institutional Retrospective Study (NKEA project) in Japan. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.084] [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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19
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Tsunematsu M, Imai M, Imai K. Influence of Washing Hands and Using Gloves During Hygienic Operations Involving Acupuncture Needles: Observation of Bacteriological Tests. J Acupunct Meridian Stud 2018. [DOI: 10.1016/j.jams.2018.08.206] [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: 11/27/2022] Open
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20
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Nogawa S, Abe T, Shigematsu H, Chin Y, Nakayama T, Imai M, Tokuoka K, Oda S, Shimoda M. DWI-aspects and NIHSS at baseline predict good responsiveness to endovascular thrombectomy following thrombolysis in large cerebral vessel occlusion. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Ishibashi N, Soejima T, Kawaguchi H, Oguchi M, Sasai K, Hasegawa M, Isobe K, Ejima Y, Ito H, Imai M, Kasuya T, Shimoda E, Akimoto T. National Survey of Japan for Myeloablative Total Body Irradiation Prior to Hematopoietic Stem Cell Transplantation. Int J Radiat Oncol Biol Phys 2017. [DOI: 10.1016/j.ijrobp.2017.06.1630] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Nakajima T, Ono Y, Kaneko Y, Saito A, Imai M, Iizuka T, Irie T, Funada R, Takama N, Kasama S, Nakamura K, Niwamae N, Tange S, Kurabayashi M. P799The clinical and genetic predispositions to ventricular tachyarrhythmias associated with vasospastic angina. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx501.p799] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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23
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Kato K, Hodgson WJ, Abraham NG, Onodera K, Imai M, Kasai S, Mito M. Expression and Inducibility of Cytochrome P450 Iiia Family within Intrasplenically Transplanted Fetal Hepatocytes. Cell Transplant 2017; 5:117-22. [PMID: 8665072 DOI: 10.1177/096368979600500116] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
With the development of transplantation of hepatocytes into the spleen, interest has focused on the metabolic changes associated with hepatocyte proliferation. As these changes are important for drug metabolism in hepatocytes, we examined the expression and inducibility of the cytochrome P450 IIIA family within transplanted hepatocytes. Fetal hepatocytes were harvested at 20 days of gestation from spontaneously hypertensive rats (SHRs) and transplanted into recipient adult SHR spleens. Microscopic examination of the recipient spleens 4 and 10 wk after transplantation revealed masses of hepatocytes with cordlike structures in the red pulp. Proliferating hepatocytes were detected with a bromodeoxyuridine (BrdU) immunohistochemical stain. Immunochemical studies detected cytochromes (cytos) P450 p and P450 HLp in fetal hepatocytes before transplantation without prior induction. And although these cytos were not detected by 10 wk after transplantation, they were induced with dexamethasone. These results demonstrated that fetal hepatocytes can be transplanted successfully into recipient spleens and suggested that fetal hepatocytes grow in the spleen, similar to the adult hepatocyte response.
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Affiliation(s)
- K Kato
- Department of Medicine and Gastrointestinal Surgery, New York Medical College, Valhalla 10595, USA
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24
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Takeuchi K, Imai M, Shimada I. Dynamic equilibrium on DNA defines transcriptional regulation of a multidrug binding transcriptional repressor, LmrR. Sci Rep 2017; 7:267. [PMID: 28325892 PMCID: PMC5428041 DOI: 10.1038/s41598-017-00257-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 12/16/2016] [Accepted: 02/14/2017] [Indexed: 11/09/2022] Open
Abstract
LmrR is a multidrug binding transcriptional repressor that controls the expression of a major multidrug transporter, LmrCD, in Lactococcus lactis. Promiscuous compound ligations reduce the affinity of LmrR for the lmrCD operator by several fold to release the transcriptional repression; however, the affinity reduction is orders of magnitude smaller than that of typical transcriptional repressors. Here, we found that the transcriptional regulation of LmrR is achieved through an equilibrium between the operator-bound and non-specific DNA-adsorption states in vivo. The effective dissociation constant of LmrR for the lmrCD operator under the equilibrium is close to the endogenous concentration of LmrR, which allows a substantial reduction of LmrR occupancy upon compound ligations. Therefore, LmrR represents a dynamic type of transcriptional regulation of prokaryotic multidrug resistance systems, where the small affinity reduction induced by compounds is coupled to the functional relocalization of the repressor on the genomic DNA via nonspecific DNA adsorption.
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Affiliation(s)
- Koh Takeuchi
- Biomedicinal Information Research Center & Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Aomi 2-3-26, Koto-ku, Tokyo, 135-0064, Japan.,PRESTO, JST, Aomi 2-3-26, Koto-ku, Tokyo, 135-0064, Japan
| | - Misaki Imai
- Research and Development Department, Japan Biological Informatics Consortium, Aomi 2-3-26, Koto-ku, Tokyo, 135-0064, Japan
| | - Ichio Shimada
- Biomedicinal Information Research Center & Molecular Profiling Research Center for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Aomi 2-3-26, Koto-ku, Tokyo, 135-0064, Japan. .,Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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25
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Miyawaki S, Araki Y, Tanimoto Y, Katayama A, Fujii A, Imai M, Takano-Yamamoto T. Occlusal Force and Condylar Motion in Patients with Anterior Open Bite. J Dent Res 2016; 84:133-7. [PMID: 15668329 DOI: 10.1177/154405910508400205] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Patients with open bite often show a weak occlusal force and temporomandibular disorders (TMDs). If these are the main cause of open bite, it may be hypothesized that both pre-pubertal and adult open-bite patients would show a weak occlusal force and abnormal condylar motion. The purpose of this study was to test this hypothesis. Test group subjects consisted of 13 consecutive pre-pubertal and 13 adult patients with anterior open bite. They were compared with age-matched normal subjects. The adult open-bite group showed a weaker occlusal force and a shorter range of condylar motion compared with the control subjects. In the pre-pubertal subjects, however, there were no significant differences in the occlusal force and range of condylar motion between the open-bite and control groups. Therefore, these results suggest that a weak occlusal force or TMDs may not be the main cause of open bite.
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Affiliation(s)
- S Miyawaki
- Department of Orthodontics and Dentofacial Orthopedics, Okayama University Graduate School of Medicine and Dentistry, 2-5-1, Shikata-cho, Okayama, 700-8525, Japan
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26
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Shimoda M, Oda S, Hirayama A, Imai M, Komatsu F, Hoshikawa K, Shigematsu H, Nishiyama J, Osada T. Centripetal Propagation of Vasoconstriction at the Time of Headache Resolution in Patients with Reversible Cerebral Vasoconstriction Syndrome. AJNR Am J Neuroradiol 2016; 37:1594-8. [PMID: 27079368 DOI: 10.3174/ajnr.a4768] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 02/05/2016] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Reversible cerebral vasoconstriction syndrome is characterized by thunderclap headache and diffuse segmental vasoconstriction that resolves spontaneously within 3 months. Previous reports have proposed that vasoconstriction first involves small distal arteries and then progresses toward major vessels at the time of thunderclap headache remission. The purpose of this study was to confirm centripetal propagation of vasoconstriction on MRA at the time of thunderclap headache remission compared with MRA at the time of reversible cerebral vasoconstriction syndrome onset. MATERIALS AND METHODS Of the 39 patients diagnosed with reversible cerebral vasoconstriction syndrome at our hospital during the study period, participants comprised the 16 patients who underwent MR imaging, including MRA, within 72 hours of reversible cerebral vasoconstriction syndrome onset (initial MRA) and within 48 hours of thunderclap headache remission. RESULTS In 14 of the 16 patients (87.5%), centripetal propagation of vasoconstriction occurred from the initial MRA to remission of thunderclap headache, with typical segmental vasoconstriction of major vessels. These mainly involved the M1 portion of the MCA (10 cases), P1 portion of the posterior cerebral artery (10 cases), and A1 portion of the anterior cerebral artery (5 cases). CONCLUSIONS This study found evidence of centripetal propagation of vasoconstriction on MRA obtained at the time of thunderclap headache remission, compared with MRA obtained at the time of reversible cerebral vasoconstriction syndrome onset. If clinicians remain unsure of the diagnosis during early-stage reversible cerebral vasoconstriction syndrome, this time point represents the best opportunity to diagnose reversible cerebral vasoconstriction syndrome with confidence.
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Affiliation(s)
- M Shimoda
- From the Department of Neurosurgery (M.S., S.O., A.H., M.I., F.K., K.H.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - S Oda
- From the Department of Neurosurgery (M.S., S.O., A.H., M.I., F.K., K.H.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - A Hirayama
- From the Department of Neurosurgery (M.S., S.O., A.H., M.I., F.K., K.H.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - M Imai
- From the Department of Neurosurgery (M.S., S.O., A.H., M.I., F.K., K.H.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - F Komatsu
- From the Department of Neurosurgery (M.S., S.O., A.H., M.I., F.K., K.H.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - K Hoshikawa
- From the Department of Neurosurgery (M.S., S.O., A.H., M.I., F.K., K.H.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - H Shigematsu
- Department of Neurosurgery (H.S., J.N., T.O.), Tokai University School of Medicine, Kanagawa, Japan
| | - J Nishiyama
- Department of Neurosurgery (H.S., J.N., T.O.), Tokai University School of Medicine, Kanagawa, Japan
| | - T Osada
- Department of Neurosurgery (H.S., J.N., T.O.), Tokai University School of Medicine, Kanagawa, Japan
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27
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Kawamura F, Yamada N, Imai M, Taniguchi T. Synthesis of ZnSnN2crystals via a high-pressure metathesis reaction. Crystal Research and Technology 2016. [DOI: 10.1002/crat.201500258] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- F. Kawamura
- National Institute for Materials Science (NIMS); Namiki 1-1 Tsukuba, Ibaraki 305-0044 Japan
| | - N. Yamada
- Department of Applied Chemistry; Chubu University; 1200 Matsumoto Kasugai Aichi 487-8501 Japan
| | - M. Imai
- National Institute for Materials Science (NIMS); Sengen 1-2-1 Tsukuba Ibaraki 305-0047 Japan
| | - T. Taniguchi
- National Institute for Materials Science (NIMS); Namiki 1-1 Tsukuba, Ibaraki 305-0044 Japan
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28
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Takeuchi K, Arthanari H, Imai M, Wagner G, Shimada I. Nitrogen-detected TROSY yields comparable sensitivity to proton-detected TROSY for non-deuterated, large proteins under physiological salt conditions. J Biomol NMR 2016; 64:143-51. [PMID: 26800993 PMCID: PMC4871712 DOI: 10.1007/s10858-016-0015-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 01/16/2016] [Indexed: 05/12/2023]
Abstract
Direct detection of the TROSY component of proton-attached (15)N nuclei ((15)N-detected TROSY) yields high quality spectra with high field magnets, by taking advantage of the slow (15)N transverse relaxation. The slow transverse relaxation and narrow line width of the (15)N-detected TROSY resonances are expected to compensate for the inherently low (15)N sensitivity. However, the sensitivity of (15)N-detected TROSY in a previous report was one-order of magnitude lower than in the conventional (1)H-detected version. This could be due to the fact that the previous experiments were performed at low salt (0-50 mM), which is advantageous for (1)H-detected experiments. Here, we show that the sensitivity gap between (15)N and (1)H becomes marginal for a non-deuterated, large protein (τ c = 35 ns) at a physiological salt concentration (200 mM). This effect is due to the high salt tolerance of the (15)N-detected TROSY. Together with the previously reported benefits of the (15)N-detected TROSY, our results provide further support for the significance of this experiment for structural studies of macromolecules when using high field magnets near and above 1 GHz.
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Affiliation(s)
- Koh Takeuchi
- Molecular Profiling Research Center for Drug Discovery, National Institute for Advanced Industrial Science and Technology, Tokyo, 135-0063, Japan
- PRESTO, JST, Tokyo, 135-0063, Japan
| | - Haribabu Arthanari
- Department of Biochemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, MA, 02115, USA
| | - Misaki Imai
- Research and Development Department, Japan Biological Informatics Consortium, Tokyo, 135-0063, Japan
| | - Gerhard Wagner
- Department of Biochemistry and Molecular Pharmacology, Harvard Medical School, 240 Longwood Avenue, Boston, MA, 02115, USA.
| | - Ichio Shimada
- Molecular Profiling Research Center for Drug Discovery, National Institute for Advanced Industrial Science and Technology, Tokyo, 135-0063, Japan.
- Graduate Schools of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan.
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29
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Oda S, Shimoda M, Hirayama A, Imai M, Komatsu F, Shigematsu H, Nishiyama J, Matsumae M. Reply: To PMID 25977479. AJNR Am J Neuroradiol 2015; 36:E64. [PMID: 26185327 DOI: 10.3174/ajnr.a4480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- S Oda
- Department of Neurosurgery Tokai University Hachioji Hospital Tokyo, Japan
| | - M Shimoda
- Department of Neurosurgery Tokai University Hachioji Hospital Tokyo, Japan
| | - A Hirayama
- Department of Neurosurgery Tokai University Hachioji Hospital Tokyo, Japan
| | - M Imai
- Department of Neurosurgery Tokai University Hachioji Hospital Tokyo, Japan
| | - F Komatsu
- Department of Neurosurgery Tokai University Hachioji Hospital Tokyo, Japan
| | - H Shigematsu
- Department of Neurosurgery Tokai University Hachioji Hospital Tokyo, Japan
| | - J Nishiyama
- Department of Neurosurgery Tokai University Hachioji Hospital Tokyo, Japan
| | - M Matsumae
- Department of Neurosurgery Tokai University School of Medicine Kanagawa, Japan
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Mitsui Y, Shimomura M, Komatsu K, Namiki N, Shibata-Hatta M, Imai M, Katayose Y, Mukai Y, Kanamori H, Kurita K, Kagami T, Wakatsuki A, Ohyanagi H, Ikawa H, Minaka N, Nakagawa K, Shiwa Y, Sasaki T. The radish genome and comprehensive gene expression profile of tuberous root formation and development. Sci Rep 2015; 5:10835. [PMID: 26056784 PMCID: PMC4650646 DOI: 10.1038/srep10835] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [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: 01/19/2015] [Accepted: 04/08/2015] [Indexed: 12/23/2022] Open
Abstract
Understanding the processes that regulate plant sink formation and development at the molecular level will contribute to the areas of crop breeding, food production and plant evolutionary studies. We report the annotation and analysis of the draft genome sequence of the radish Raphanus sativus var. hortensis (long and thick root radish) and transcriptome analysis during root development. Based on the hybrid assembly approach of next-generation sequencing, a total of 383 Mb (N50 scaffold: 138.17 kb) of sequences of the radish genome was constructed containing 54,357 genes. Syntenic and phylogenetic analyses indicated that divergence between Raphanus and Brassica coincide with the time of whole genome triplication (WGT), suggesting that WGT triggered diversification of Brassiceae crop plants. Further transcriptome analysis showed that the gene functions and pathways related to carbohydrate metabolism were prominently activated in thickening roots, particularly in cell proliferating tissues. Notably, the expression levels of sucrose synthase 1 (SUS1) were correlated with root thickening rates. We also identified the genes involved in pungency synthesis and their transcription factors.
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Affiliation(s)
- Yuki Mitsui
- Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Michihiko Shimomura
- Mitsubishi Space Software Co., Ltd., 1-6-1, Takezono, Tsukuba, Ibaraki 305-0032, Japan
| | - Kenji Komatsu
- Junior College of Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Nobukazu Namiki
- Mitsubishi Space Software Co., Ltd., 1-6-1, Takezono, Tsukuba, Ibaraki 305-0032, Japan
| | - Mari Shibata-Hatta
- Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Misaki Imai
- Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Yuichi Katayose
- National Institute of Agrobiological Sciences, 1-2, Owashi, Tsukuba, Ibaraki, 305-8634, Japan
| | - Yoshiyuki Mukai
- National Institute of Agrobiological Sciences, 1-2, Owashi, Tsukuba, Ibaraki, 305-8634, Japan
| | - Hiroyuki Kanamori
- National Institute of Agrobiological Sciences, 1-2, Owashi, Tsukuba, Ibaraki, 305-8634, Japan
| | - Kanako Kurita
- National Institute of Agrobiological Sciences, 1-2, Owashi, Tsukuba, Ibaraki, 305-8634, Japan
| | - Tsutomu Kagami
- Sakata Seed Corporation, 2-7-1, Nakamachidai, Tuzuki-ku, Yokohama, 224-0041, Japan
| | - Akihito Wakatsuki
- Sakata Seed Corporation, 2-7-1, Nakamachidai, Tuzuki-ku, Yokohama, 224-0041, Japan
| | - Hajime Ohyanagi
- Mitsubishi Space Software Co., Ltd., 1-6-1, Takezono, Tsukuba, Ibaraki 305-0032, Japan
| | - Hiroshi Ikawa
- Mitsubishi Space Software Co., Ltd., 1-6-1, Takezono, Tsukuba, Ibaraki 305-0032, Japan
| | - Nobuhiro Minaka
- 1] Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan [2] National Institute for Agro-Environmental Science, 3-1-3, Tukuba, 305-8604, Japan
| | - Kunihiro Nakagawa
- Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Yu Shiwa
- Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
| | - Takuji Sasaki
- 1] Tokyo University of Agriculture, 1-1-1, Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan [2] National Institute of Agrobiological Sciences, 1-2, Owashi, Tsukuba, Ibaraki, 305-8634, Japan
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Imai M, Arimura H, Nonaka A, Nakamura K, Shioyama Y, Honda H, Hirata H. SU-E-T-696: Similar-Case-Based Framework of Beam Angle Configurations Using Treatment-Plan-Related Features in Lung Stereotactic Body Radiation Therapy. Med Phys 2015. [DOI: 10.1118/1.4925060] [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] Open
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Furuta Y, Konno M, Osaki T, Yonezawa H, Ishige T, Imai M, Shiwa Y, Shibata-Hatta M, Kanesaki Y, Yoshikawa H, Kamiya S, Kobayashi I. Microevolution of Virulence-Related Genes in Helicobacter pylori Familial Infection. PLoS One 2015; 10:e0127197. [PMID: 25978460 PMCID: PMC4433339 DOI: 10.1371/journal.pone.0127197] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 04/13/2015] [Indexed: 12/20/2022] Open
Abstract
Helicobacter pylori, a bacterial pathogen that can infect human stomach causing gastritis, ulcers and cancer, is known to have a high degree of genome/epigenome diversity as the result of mutation and recombination. The bacteria often infect in childhood and persist for the life of the host. One of the reasons of the rapid evolution of H. pylori is that it changes its genome drastically for adaptation to a new host. To investigate microevolution and adaptation of the H. pylori genome, we undertook whole genome sequencing of the same or very similar sequence type in multi-locus sequence typing (MLST) with seven genes in members of the same family consisting of parents and children in Japan. Detection of nucleotide substitutions revealed likely transmission pathways involving children. Nonsynonymous (amino acid changing) mutations were found in virulence-related genes (cag genes, vacA, hcpDX, tnfα, ggt, htrA and the collagenase gene), outer membrane protein (OMP) genes and other cell surface-related protein genes, signal transduction genes and restriction-modification genes. We reconstructed various pathways by which H. pylori can adapt to a new human host, and our results raised the possibility that the mutational changes in virulence-related genes have a role in adaptation to a child host. Changes in restriction-modification genes might remodel the methylome and transcriptome to help adaptation. This study has provided insights into H. pylori transmission and virulence and has implications for basic research as well as clinical practice.
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Affiliation(s)
- Yoshikazu Furuta
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, University of Tokyo, Minato-ku, Tokyo, Japan
- Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Mutsuko Konno
- Department of Pediatrics, Sapporo Kosei General Hospital, Sapporo-shi, Hokkaido, Japan
| | - Takako Osaki
- Department of Infectious Diseases, Kyorin University School of Medicine, Mitaka-shi, Tokyo, Japan
| | - Hideo Yonezawa
- Department of Infectious Diseases, Kyorin University School of Medicine, Mitaka-shi, Tokyo, Japan
| | - Taichiro Ishige
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Misaki Imai
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Yuh Shiwa
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Mari Shibata-Hatta
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Yu Kanesaki
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Hirofumi Yoshikawa
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Shigeru Kamiya
- Department of Infectious Diseases, Kyorin University School of Medicine, Mitaka-shi, Tokyo, Japan
| | - Ichizo Kobayashi
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, University of Tokyo, Minato-ku, Tokyo, Japan
- Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
- * E-mail:
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Oda S, Shimoda M, Hirayama A, Imai M, Komatsu F, Shigematsu H, Nishiyama J, Matsumae M. Neuroradiologic Diagnosis of Minor Leak prior to Major SAH: Diagnosis by T1-FLAIR Mismatch. AJNR Am J Neuroradiol 2015; 36:1616-22. [PMID: 25977479 DOI: 10.3174/ajnr.a4325] [Citation(s) in RCA: 15] [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] [Received: 12/11/2014] [Accepted: 02/09/2015] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE In major SAH, the only method to diagnose a preceding minor leak is to ascertain the presence of a warning headache by interview; however, poor clinical condition and recall bias can cause inaccuracy. We devised a neuroradiologic method to diagnose previous minor leak in patients with SAH and attempted to determine whether warning (sentinel) headaches were associated with minor leaks before major SAH. MATERIALS AND METHODS We retrospectively evaluated 127 patients who were admitted with SAH within 48 hours of ictus. Previous minor leak before major SAH was defined as T1WI-detected clearly bright hyperintense subarachnoid blood accompanied by SAH blood on FLAIR images that was distributed over a larger area than bright hyperintense subarachnoid blood on T1WI (T1-FLAIR mismatch). RESULTS The incidence of warning headache before SAH was 11.0% (14 of 127 patients, determined by interview). The incidence of T1-FLAIR mismatch (neuroradiologic diagnosis of minor leak before major SAH) was 33.9% (43 of 127 patients). Of the 14 patients with warning headache, 13 had a minor leak diagnosed by T1-FLAIR mismatch at the time of admission. Variables identified by multivariate analysis as significantly associated with minor leak diagnosed by T1-FLAIR mismatch included 80 years of age or older, rebleeding after admission, intracerebral hemorrhage on CT, and mRS scores of 3-6. CONCLUSIONS We conclude that warning headaches diagnosed by interview are not a product of recall bias but are the result of actual leaks from aneurysms.
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Affiliation(s)
- S Oda
- From the Department of Neurosurgery (S.O., M.S., A.H., M.I., F.K., H.S., J.N.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - M Shimoda
- From the Department of Neurosurgery (S.O., M.S., A.H., M.I., F.K., H.S., J.N.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - A Hirayama
- From the Department of Neurosurgery (S.O., M.S., A.H., M.I., F.K., H.S., J.N.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - M Imai
- From the Department of Neurosurgery (S.O., M.S., A.H., M.I., F.K., H.S., J.N.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - F Komatsu
- From the Department of Neurosurgery (S.O., M.S., A.H., M.I., F.K., H.S., J.N.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - H Shigematsu
- From the Department of Neurosurgery (S.O., M.S., A.H., M.I., F.K., H.S., J.N.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - J Nishiyama
- From the Department of Neurosurgery (S.O., M.S., A.H., M.I., F.K., H.S., J.N.), Tokai University Hachioji Hospital, Tokyo, Japan
| | - M Matsumae
- Department of Neurosurgery (M.M.), Tokai University School of Medicine, Kanagawa, Japan
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Goh SK, Tompsett DA, Saines PJ, Chang HC, Matsumoto T, Imai M, Yoshimura K, Grosche FM. Ambient pressure structural quantum critical point in the phase diagram of (Ca(x)Sr(1-x))(3)Rh(4)Sn(13). Phys Rev Lett 2015; 114:097002. [PMID: 25793843 DOI: 10.1103/physrevlett.114.097002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Indexed: 06/04/2023]
Abstract
The quasiskutterudite superconductor Sr_{3}Rh_{4}Sn_{13} features a pronounced anomaly in electrical resistivity at T^{*}∼138 K. We show that the anomaly is caused by a second-order structural transition, which can be tuned to 0 K by applying physical pressure and chemical pressure via the substitution of Ca for Sr. A broad superconducting dome is centered around the structural quantum critical point. Detailed analysis of the tuning parameter dependence of T^{*} as well as insights from lattice dynamics calculations strongly support the existence of a structural quantum critical point at ambient pressure when the fraction of Ca is 0.9 (i.e., x_{c}=0.9). This establishes the (Ca_{x}Sr_{1-x})_{3}Rh_{4}Sn_{13} series as an important system for exploring the physics of structural quantum criticality without the need of applying high pressures.
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Affiliation(s)
- S K Goh
- Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
- Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - D A Tompsett
- Department of Chemistry, Imperial College London, South Kensington SW7 2AZ, United Kingdom
| | - P J Saines
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - H C Chang
- Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
| | - T Matsumoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - M Imai
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - K Yoshimura
- Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - F M Grosche
- Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom
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Shin MR, Natsuume M, Matsumoto T, Hanaoka M, Imai M, Iijima K, Oka SI, Adachi E, Kodama H. Sense transgene-induced post-transcriptional gene silencing in tobacco compromises the splicing of endogenous counterpart genes. PLoS One 2014; 9:e87869. [PMID: 24586294 PMCID: PMC3931610 DOI: 10.1371/journal.pone.0087869] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 12/31/2013] [Indexed: 11/23/2022] Open
Abstract
Sense transgene-induced post-transcriptional gene silencing (S-PTGS) is thought to be a type of RNA silencing in which ARGONAUTE1 directs the small interfering RNA (siRNA)-mediated cleavage of a target mRNA in the cytoplasm. Here, we report that the altered splicing of endogenous counterpart genes is a main cause for the reduction of their mature mRNA levels. After the S-PTGS of a tobacco endoplasmic reticulum ω-3 fatty acid desaturase (NtFAD3) gene, 3'-truncated, polyadenylated endo-NtFAD3 transcripts and 5'-truncated, intron-containing endo-NtFAD3 transcripts were detected in the total RNA fraction. Although transcription proceeded until the last exon of the endogenous NtFAD3 gene, intron-containing NtFAD3 transcripts accumulated in the nucleus of the S-PTGS plants. Several intron-containing NtFAD3 transcripts harboring most of the exon sequences were generated when an endogenous silencing suppressor gene, rgs-CaM, was overexpressed in the S-PTGS plants. These intron-containing NtFAD3 splice variants were generated in the presence of NtFAD3 siRNAs that are homologous to the nucleotide sequences of these splice variants. The results of this study indicate that the inhibition of endo-NtFAD3 gene expression is primarily directed via the alteration of splicing and not by cytoplasmic slicer activity. Our results suggest that the transgene and intron-containing endogenous counterpart genes are differentially suppressed in S-PTGS plants.
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Affiliation(s)
- Mi-Rae Shin
- Graduate School of Advanced Integration Science, Chiba University, Inage-ku, Chiba, Japan
| | - Masaya Natsuume
- Graduate School of Horticulture, Chiba University, Chiba, Japan
| | - Takashi Matsumoto
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | | | - Misaki Imai
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Ken Iijima
- Department of Applied Biology and Chemistry, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Shin-ichiro Oka
- Graduate School of Horticulture, Chiba University, Chiba, Japan
| | - Eri Adachi
- Graduate School of Science and Technology, Chiba University, Inage-ku, Chiba, Japan
| | - Hiroaki Kodama
- Graduate School of Advanced Integration Science, Chiba University, Inage-ku, Chiba, Japan
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Abstract
Influenza A viruses cause yearly epidemics and occasional pandemics. In addition, zoonotic influenza A viruses sporadically infect humans and may cause severe respiratory disease and fatalities. Fortunately, most of these viruses do not have the ability to be efficiently spread among humans via aerosols or respiratory droplets (airborne transmission) and to subsequently cause a pandemic. However, adaptation of these zoonotic viruses to humans by mutation or reassortment with human influenza A viruses may result in airborne transmissible viruses with pandemic potential. Although our knowledge of factors that affect mammalian adaptation and transmissibility of influenza viruses is still limited, we are beginning to understand some of the biological traits that drive airborne transmission of influenza viruses among mammals. Increased understanding of the determinants and mechanisms of airborne transmission may aid in assessing the risks posed by avian influenza viruses to human health, and preparedness for such risks. This chapter summarizes recent discoveries on the genetic and phenotypic traits required for avian influenza viruses to become airborne transmissible between mammals.
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Affiliation(s)
- S Herfst
- Department of Viroscience, Postgraduate School Molecular Medicine, Erasmus Medical Center, P.O. Box 2040, 3000 CA, Rotterdam, The Netherlands
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Sei Y, Mizuno M, Imai M, Suzuki Y, Higashide K, Okada N, Harris C, Matsuo S, Ito Y. Expression of membrane complement regulators in patients on peritoneal dialysis therapy. Mol Immunol 2013. [DOI: 10.1016/j.molimm.2013.05.110] [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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Tsuda K, Kawahara-Miki R, Sano S, Imai M, Noguchi T, Inayoshi Y, Kono T. Abundant sequence divergence in the native Japanese cattle Mishima-Ushi (Bos taurus) detected using whole-genome sequencing. Genomics 2013; 102:372-8. [PMID: 23938316 DOI: 10.1016/j.ygeno.2013.08.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [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: 04/23/2013] [Revised: 07/06/2013] [Accepted: 08/02/2013] [Indexed: 12/30/2022]
Abstract
The native Japanese cattle Mishima-Ushi, a designated national natural treasure, are bred on a remote island, which has resulted in the conservation of their genealogy. We examined the genetic characteristics of 8 Mishima-Ushi individuals by using single nucleotide polymorphisms (SNPs), insertions, and deletions obtained by whole-genome sequencing. Mapping analysis with various criteria showed that predicted heterozygous SNPs were more prevalent than predicted homozygous SNPs in the exonic region, especially non-synonymous SNPs. From the identified 6.54 million polymorphisms, we found 400 non-synonymous SNPs in 313 genes specific to each of the 8 Mishima-Ushi individuals. Additionally, 3,170,833 polymorphisms were found between the 8 Mishima-Ushi individuals. Phylogenetic analysis confirmed that the Mishima-Ushi population diverged from another strain of Japanese cattle. This study provides a framework for further genetic studies of Mishima-Ushi and research on the function of SNP-containing genes as well as understanding the genetic relationship between the domestic and native Japanese cattle breeds.
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Affiliation(s)
- Kaoru Tsuda
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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Higami H, Shiomi H, Tazaki J, Imai M, Saito N, Kimura T. Five-year outcomes and late adverse events after sirolimus-eluting stent implantation for unprotected left main coronary artery disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p5529] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Imai M, Kimura TK. Characteristics of angiographic Peri-Stent contrast Staining (PSS) on very late stent thrombosis after sirolimus-eluting stent implantation: morphological classification and antiplatelet therapy. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht310.p4811] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Vass A, Süveges G, Érces D, Nógrády M, Varga G, Földesi I, Futakuchi M, Imai M, Okada N, Okada H, Boros M, Kaszaki J. Inflammatory activation after experimental cardiac tamponade. Eur Surg Res 2013; 51:1-13. [PMID: 23859935 DOI: 10.1159/000352089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Accepted: 05/14/2013] [Indexed: 11/19/2022]
Abstract
BACKGROUND/PURPOSE Cardiac tamponade is a medical emergency situation associated with a high rate of life-threatening complications, even after immediate interventions. Our aim was to characterize the acute inflammatory consequences of this event in a clinically relevant large animal model. METHODS Cardiac tamponade was induced for 60 min in anesthetized, ventilated and thoracotomized minipigs by intrapericardial fluid administration, the mean arterial pressure (MAP) being maintained in the interval of 40-45 mm Hg (n = 8). A further group (n = 7) served as sham-operated control. The global macrohemodynamics, including the right- and left-heart end-diastolic volumes (RHEDV and LHEDV), the pulmonary vascular resistance index (PVRI) and the superior mesenteric artery (SMA) flow, were monitored for 240 min, and the intestinal microcirculatory changes (pCO2 gap) were evaluated by indirect tonometry. Blood samples were taken for the determination of cardiac troponin T and vasoactive inflammatory mediators, including histamine, nitrite/nitrate, big-endothelin, superoxide and high-mobility group box protein-1 levels in association with intestinal leukocyte and complement activation. RESULTS The cardiac tamponade induced significant decreases in MAP, cardiac output, LHEDV and SMA flow, while the PVRI and the pCO2 gap increased significantly. After the removal of fluid from the pericardial sac, the MAP and the LHEDV were decreased, while the PVRI and the pCO2 gap remained elevated when compared with those in the sham-operated group. In the posttamponade period, the abrupt release of inflammatory mediators was accompanied by a significant splanchnic leukocyte accumulation and complement activation. CONCLUSIONS The macrocirculatory and splanchnic microcirculatory disturbances were accompanied by a significant proinflammatory reaction; endothelin and the complement system may be significant components of the inflammatory cascade that is activated in this porcine model of pericardial tamponade.
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Affiliation(s)
- A Vass
- Institute of Surgical Research, University of Szeged, Szeged, Hungary
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Imai M, Iriki Y, Itoh A. Target Dependence of Single-Electron-Capture Cross Sections for Slow Be, B, C, Fe, Ni, and W Ions Colliding with Atomic and Molecular Targets. Fusion Science and Technology 2013. [DOI: 10.13182/fst13-a16447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Imai
- Kyoto University, Department of Nuclear Engineering, Sakyo, Kyoto 606-8501, Japan
| | - Y. Iriki
- Kyoto University, Department of Nuclear Engineering, Sakyo, Kyoto 606-8501, Japan
| | - A. Itoh
- Kyoto University, Quantum Science and Engineering Center, Uji, Kyoto 611-0011, Japan
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Kobayashi H, Sakurai T, Miura F, Imai M, Mochiduki K, Yanagisawa E, Sakashita A, Wakai T, Suzuki Y, lto T, Matsui Y, Kono T. Amplification-free whole-genome shotgun bisulfite sequencing of mouse primordial germ cells. Epigenetics Chromatin 2013. [PMCID: PMC3620692 DOI: 10.1186/1756-8935-6-s1-p116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Komiya T, Sato K, Shioya H, Inagaki Y, Hagiya H, Kozaki R, Imai M, Takada Y, Maeda T, Kurata H, Kurono M, Suzuki R, Otsuki K, Habashita H, Nakade S. Efficacy and immunomodulatory actions of ONO-4641, a novel selective agonist for sphingosine 1-phosphate receptors 1 and 5, in preclinical models of multiple sclerosis. Clin Exp Immunol 2013. [PMID: 23199323 DOI: 10.1111/j.1365-2249.2012.04669.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
ONO-4641 is a next-generation sphingosine 1-phosphate (S1P) receptor agonist selective for S1P receptors 1 and 5. The objective of the study was to characterize the immunomodulatory effects of ONO-4641 using preclinical data. ONO-4641 was tested in both in-vitro pharmacological studies as well as in-vivo models of transient or relapsing-remitting experimental autoimmune encephalomyelitis (EAE). In vitro, ONO-4641 showed highly potent agonistic activities versus S1P receptors 1 and 5 [half maximal effective concentration (EC(50) ) values of 0·0273 and 0·334 nM, respectively], and had profound S1P receptor 1 down-regulating effects on the cell membrane. ONO-4641 decreased peripheral blood lymphocyte counts in rats by inhibiting lymphocyte egress from secondary lymphoid tissues. In a rat experimental autoimmune encephalomyelitis (EAE) model, ONO-4641 suppressed the onset of disease and inhibited lymphocyte infiltration into the spinal cord in a dose-dependent manner at doses of 0·03 and 0·1 mg/kg. Furthermore, ONO-4641 prevented relapse of disease in a non-obese diabetic mouse model of relapsing-remitting EAE. These observations suggest that ONO-4641 may provide therapeutic benefits in the treatment of multiple sclerosis.
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Affiliation(s)
- T Komiya
- Exploratory Research Laboratories, Tsukuba, Ibaraki, Japan.
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Kobayashi H, Sakurai T, Miura F, Imai M, Mochiduki K, Yanagisawa E, Sakashita A, Wakai T, Suzuki Y, Ito T, Matsui Y, Kono T. High-resolution DNA methylome analysis of primordial germ cells identifies gender-specific reprogramming in mice. Genome Res 2013; 23:616-27. [PMID: 23410886 PMCID: PMC3613579 DOI: 10.1101/gr.148023.112] [Citation(s) in RCA: 199] [Impact Index Per Article: 18.1] [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] [Indexed: 12/02/2022]
Abstract
Dynamic epigenetic reprogramming occurs during mammalian germ cell development, although the targets of this process, including DNA demethylation and de novo methylation, remain poorly understood. We performed genome-wide DNA methylation analysis in male and female mouse primordial germ cells at embryonic days 10.5, 13.5, and 16.5 by whole-genome shotgun bisulfite sequencing. Our high-resolution DNA methylome maps demonstrated gender-specific differences in CpG methylation at genome-wide and gene-specific levels during fetal germline progression. There was extensive intra- and intergenic hypomethylation with erasure of methylation marks at imprinted, X-linked, or germline-specific genes during gonadal sex determination and partial methylation at particular retrotransposons. Following global demethylation and sex determination, CpG sites switched to de novo methylation in males, but the X-linked genes appeared resistant to the wave of de novo methylation. Significant differential methylation at a subset of imprinted loci was identified in both genders, and non-CpG methylation occurred only in male gonocytes. Our data establish the basis for future studies on the role of epigenetic modifications in germline development and other biological processes.
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Affiliation(s)
- Hisato Kobayashi
- Department of BioScience, Tokyo University of Agriculture, Setagaya-ku, Tokyo 156-8502, Japan
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Katakami N, Atagi S, Yoshioka H, Fukuoka M, Ogiwara A, Imai M, Ueda M, Matsui S. Nested Case Control Study of Proteomic Biomarkers for Interstitial Lung Disease in Japanese Patients With Non-Small Cell Lung Cancer Treated With Erlotinib. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32800-3] [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: 10/25/2022] Open
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Pehkonen H, Lepikhova T, Louhimo R, Peitsaro N, Imai M, Martinez R, Klefström J, Hautaniemi S, Monni O. 380 Functional Properties of PPFIA1, Located at the 11q13 Amplification Region, in Epithelial Cancer Cells. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71065-1] [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: 10/28/2022]
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Kobayashi H, Sakurai T, Imai M, Takahashi N, Fukuda A, Yayoi O, Sato S, Nakabayashi K, Hata K, Sotomaru Y, Suzuki Y, Kono T. Contribution of intragenic DNA methylation in mouse gametic DNA methylomes to establish oocyte-specific heritable marks. PLoS Genet 2012; 8:e1002440. [PMID: 22242016 PMCID: PMC3252278 DOI: 10.1371/journal.pgen.1002440] [Citation(s) in RCA: 376] [Impact Index Per Article: 31.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Accepted: 11/14/2011] [Indexed: 12/14/2022] Open
Abstract
Genome-wide dynamic changes in DNA methylation are indispensable for germline development and genomic imprinting in mammals. Here, we report single-base resolution DNA methylome and transcriptome maps of mouse germ cells, generated using whole-genome shotgun bisulfite sequencing and cDNA sequencing (mRNA-seq). Oocyte genomes showed a significant positive correlation between mRNA transcript levels and methylation of the transcribed region. Sperm genomes had nearly complete coverage of methylation, except in the CpG-rich regions, and showed a significant negative correlation between gene expression and promoter methylation. Thus, these methylome maps revealed that oocytes and sperms are widely different in the extent and distribution of DNA methylation. Furthermore, a comparison of oocyte and sperm methylomes identified more than 1,600 CpG islands differentially methylated in oocytes and sperm (germline differentially methylated regions, gDMRs), in addition to the known imprinting control regions (ICRs). About half of these differentially methylated DNA sequences appear to be at least partially resistant to the global DNA demethylation that occurs during preimplantation development. In the absence of Dnmt3L, neither methylation of most oocyte-methylated gDMRs nor intragenic methylation was observed. There was also genome-wide hypomethylation, and partial methylation at particular retrotransposons, while maintaining global gene expression, in oocytes. Along with the identification of the many Dnmt3L-dependent gDMRs at intragenic regions, the present results suggest that oocyte methylation can be divided into 2 types: Dnmt3L-dependent methylation, which is required for maternal methylation imprinting, and Dnmt3L-independent methylation, which might be essential for endogenous retroviral DNA silencing. The present data provide entirely new perspectives on the evaluation of epigenetic markers in germline cells. In mammals, germ-cell–specific methylation patterns and genomic imprints are established throughout large-scale de novo DNA methylation in oogenesis and spermatogenesis. These steps are required for normal germline differentiation and embryonic development; however, current DNA methylation analyses only provide us a partial picture of germ cell methylome. To the best of our knowledge, this is the first study to generate comprehensive maps of DNA methylomes and transcriptomes at single base resolution for mouse germ cells. These methylome maps revealed genome-wide opposing DNA methylation patterns and differential correlation between methylation and gene expression levels in oocyte and sperm genomes. In addition, our results indicate the presence of 2 types of methylation patterns in the oocytes: (i) methylation across the transcribed regions, which might be required for the establishment of maternal methylation imprints and normal embryogenesis, and (ii) retroviral methylation, which might be essential for silencing of retrotransposons and normal oogenesis. We believe that an extension of this work would lead to a better understanding of the epigenetic reprogramming in germline cells and of the role for gene regulations.
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Affiliation(s)
- Hisato Kobayashi
- Department of BioScience, Tokyo University of Agriculture, Tokyo, Japan
| | - Takayuki Sakurai
- Department of BioScience, Tokyo University of Agriculture, Tokyo, Japan
| | - Misaki Imai
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Tokyo, Japan
| | - Nozomi Takahashi
- Department of BioScience, Tokyo University of Agriculture, Tokyo, Japan
| | - Atsushi Fukuda
- Department of BioScience, Tokyo University of Agriculture, Tokyo, Japan
| | - Obata Yayoi
- Department of BioScience, Tokyo University of Agriculture, Tokyo, Japan
| | - Shun Sato
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Kazuhiko Nakabayashi
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Kenichiro Hata
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Yusuke Sotomaru
- Natural Science Center for Basic Research and Development, Hiroshima University, Hiroshima, Japan
| | - Yutaka Suzuki
- Department of Medical Genome Sciences, Graduate School of Frontier, The University of Tokyo, Kashiwa, Japan
| | - Tomohiro Kono
- Department of BioScience, Tokyo University of Agriculture, Tokyo, Japan
- Genome Research Center, NODAI Research Institute, Tokyo University of Agriculture, Tokyo, Japan
- * E-mail:
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Kashima K, Imai M. Impact Factors to Regulate Mass Transfer Characteristics of Stable Alginate Membrane Performed Superior Sensitivity on Various Organic Chemicals. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proeng.2012.07.490] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Sakuma Y, Urakami N, Taniguchi T, Imai M. Asymmetric distribution of cone-shaped lipids in a highly curved bilayer revealed by a small angle neutron scattering technique. J Phys Condens Matter 2011; 23:284104. [PMID: 21709321 DOI: 10.1088/0953-8984/23/28/284104] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have investigated the lipid sorting in a binary small unilamellar vesicle (SUV) composed of cone-shaped (1,2-dihexanoyl-sn-glycero-3-phosphocholine: DHPC) and cylinder-shaped (1,2-dipalmitoyl-sn-glycero-3-phosphocholine: DPPC) lipids. In order to reveal the lipid sorting we adopted a contrast matching technique of small angle neutron scattering (SANS), which extracts the distribution of deuterated lipids in the bilayer quantitatively without steric modification of lipids as in fluorescence probe techniques. First the SANS profile of protonated SUVs at a film contrast condition showed that SUVs have a spherical shape with an inner radius of 190 Å and a bilayer thickness of 40 Å. The SANS profile of deuterated SUVs at a contrast matching condition showed a characteristic scattering profile, indicating an asymmetric distribution of cone-shaped lipids in the bilayer. The characteristic profile was described well by a spherical bilayer model. The fitting revealed that most DHPC molecules are localized in the outer leaflet. Thus the shape of the lipid is strongly coupled with the membrane curvature. We compared the obtained asymmetric distribution of the cone-shaped lipids in the bilayer with the theoretical prediction based on the curvature energy model.
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Affiliation(s)
- Y Sakuma
- Department of Physics, Ochanomizu University, Bunkyo, Tokyo, Japan
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