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Cartucho J, Weld A, Tukra S, Xu H, Matsuzaki H, Ishikawa T, Kwon M, Jang YE, Kim KJ, Lee G, Bai B, Kahrs LA, Boecking L, Allmendinger S, Müller L, Zhang Y, Jin Y, Bano S, Vasconcelos F, Reiter W, Hajek J, Silva B, Lima E, Vilaça JL, Queirós S, Giannarou S. SurgT challenge: Benchmark of soft-tissue trackers for robotic surgery. Med Image Anal 2024; 91:102985. [PMID: 37844472 DOI: 10.1016/j.media.2023.102985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 08/30/2023] [Accepted: 09/28/2023] [Indexed: 10/18/2023]
Abstract
This paper introduces the "SurgT: Surgical Tracking" challenge which was organized in conjunction with the 25th International Conference on Medical Image Computing and Computer-Assisted Intervention (MICCAI 2022). There were two purposes for the creation of this challenge: (1) the establishment of the first standardized benchmark for the research community to assess soft-tissue trackers; and (2) to encourage the development of unsupervised deep learning methods, given the lack of annotated data in surgery. A dataset of 157 stereo endoscopic videos from 20 clinical cases, along with stereo camera calibration parameters, have been provided. Participants were assigned the task of developing algorithms to track the movement of soft tissues, represented by bounding boxes, in stereo endoscopic videos. At the end of the challenge, the developed methods were assessed on a previously hidden test subset. This assessment uses benchmarking metrics that were purposely developed for this challenge, to verify the efficacy of unsupervised deep learning algorithms in tracking soft-tissue. The metric used for ranking the methods was the Expected Average Overlap (EAO) score, which measures the average overlap between a tracker's and the ground truth bounding boxes. Coming first in the challenge was the deep learning submission by ICVS-2Ai with a superior EAO score of 0.617. This method employs ARFlow to estimate unsupervised dense optical flow from cropped images, using photometric and regularization losses. Second, Jmees with an EAO of 0.583, uses deep learning for surgical tool segmentation on top of a non-deep learning baseline method: CSRT. CSRT by itself scores a similar EAO of 0.563. The results from this challenge show that currently, non-deep learning methods are still competitive. The dataset and benchmarking tool created for this challenge have been made publicly available at https://surgt.grand-challenge.org/. This challenge is expected to contribute to the development of autonomous robotic surgery and other digital surgical technologies.
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Affiliation(s)
- João Cartucho
- The Hamlyn Centre for Robotic Surgery, Imperial College London, United Kingdom.
| | - Alistair Weld
- The Hamlyn Centre for Robotic Surgery, Imperial College London, United Kingdom
| | - Samyakh Tukra
- The Hamlyn Centre for Robotic Surgery, Imperial College London, United Kingdom
| | - Haozheng Xu
- The Hamlyn Centre for Robotic Surgery, Imperial College London, United Kingdom
| | | | | | - Minjun Kwon
- Electronics and Telecommunications Research Institute (ETRI), Daejeon, South Korea
| | - Yong Eun Jang
- Electronics and Telecommunications Research Institute (ETRI), Daejeon, South Korea
| | - Kwang-Ju Kim
- Electronics and Telecommunications Research Institute (ETRI), Daejeon, South Korea
| | - Gwang Lee
- Ajou University, Gyeonggi-do, South Korea
| | - Bizhe Bai
- Medical Computer Vision and Robotics Lab, University of Toronto, Canada
| | - Lueder A Kahrs
- Medical Computer Vision and Robotics Lab, University of Toronto, Canada
| | | | | | | | - Yitong Zhang
- Surgical Robot Vision, University College London, United Kingdom
| | - Yueming Jin
- Surgical Robot Vision, University College London, United Kingdom
| | - Sophia Bano
- Surgical Robot Vision, University College London, United Kingdom
| | | | | | | | - Bruno Silva
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal; 2Ai - School of Technology, IPCA, Barcelos, Portugal
| | - Estevão Lima
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - João L Vilaça
- 2Ai - School of Technology, IPCA, Barcelos, Portugal
| | - Sandro Queirós
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal; ICVS/3B's - PT Government Associate Laboratory, Braga/Guimarães, Portugal
| | - Stamatia Giannarou
- The Hamlyn Centre for Robotic Surgery, Imperial College London, United Kingdom
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Igaki T, Kitaguchi D, Matsuzaki H, Nakajima K, Kojima S, Hasegawa H, Takeshita N, Kinugasa Y, Ito M. Automatic Surgical Skill Assessment System Based on Concordance of Standardized Surgical Field Development Using Artificial Intelligence. JAMA Surg 2023; 158:e231131. [PMID: 37285142 PMCID: PMC10248810 DOI: 10.1001/jamasurg.2023.1131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 01/28/2023] [Indexed: 06/08/2023]
Abstract
IMPORTANCE Automatic surgical skill assessment with artificial intelligence (AI) is more objective than manual video review-based skill assessment and can reduce human burden. Standardization of surgical field development is an important aspect of this skill assessment. OBJECTIVE To develop a deep learning model that can recognize the standardized surgical fields in laparoscopic sigmoid colon resection and to evaluate the feasibility of automatic surgical skill assessment based on the concordance of the standardized surgical field development using the proposed deep learning model. DESIGN, SETTING, AND PARTICIPANTS This retrospective diagnostic study used intraoperative videos of laparoscopic colorectal surgery submitted to the Japan Society for Endoscopic Surgery between August 2016 and November 2017. Data were analyzed from April 2020 to September 2022. INTERVENTIONS Videos of surgery performed by expert surgeons with Endoscopic Surgical Skill Qualification System (ESSQS) scores higher than 75 were used to construct a deep learning model able to recognize a standardized surgical field and output its similarity to standardized surgical field development as an AI confidence score (AICS). Other videos were extracted as the validation set. MAIN OUTCOMES AND MEASURES Videos with scores less than or greater than 2 SDs from the mean were defined as the low- and high-score groups, respectively. The correlation between AICS and ESSQS score and the screening performance using AICS for low- and high-score groups were analyzed. RESULTS The sample included 650 intraoperative videos, 60 of which were used for model construction and 60 for validation. The Spearman rank correlation coefficient between the AICS and ESSQS score was 0.81. The receiver operating characteristic (ROC) curves for the screening of the low- and high-score groups were plotted, and the areas under the ROC curve for the low- and high-score group screening were 0.93 and 0.94, respectively. CONCLUSIONS AND RELEVANCE The AICS from the developed model strongly correlated with the ESSQS score, demonstrating the model's feasibility for use as a method of automatic surgical skill assessment. The findings also suggest the feasibility of the proposed model for creating an automated screening system for surgical skills and its potential application to other types of endoscopic procedures.
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Affiliation(s)
- Takahiro Igaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Gastrointestinal Surgery, Tokyo Medical and Dental University Graduate School of Medicine, Yushima, Bunkyo-Ku, Tokyo, Japan
| | - Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Kei Nakajima
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Shigehiro Kojima
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Hiro Hasegawa
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Yusuke Kinugasa
- Department of Gastrointestinal Surgery, Tokyo Medical and Dental University Graduate School of Medicine, Yushima, Bunkyo-Ku, Tokyo, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
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3
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Huaulmé A, Harada K, Nguyen QM, Park B, Hong S, Choi MK, Peven M, Li Y, Long Y, Dou Q, Kumar S, Lalithkumar S, Hongliang R, Matsuzaki H, Ishikawa Y, Harai Y, Kondo S, Mitsuishi M, Jannin P. PEg TRAnsfer Workflow recognition challenge report: Do multimodal data improve recognition? Comput Methods Programs Biomed 2023; 236:107561. [PMID: 37119774 DOI: 10.1016/j.cmpb.2023.107561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 04/06/2023] [Accepted: 04/18/2023] [Indexed: 05/21/2023]
Abstract
BACKGROUND AND OBJECTIVE In order to be context-aware, computer-assisted surgical systems require accurate, real-time automatic surgical workflow recognition. In the past several years, surgical video has been the most commonly-used modality for surgical workflow recognition. But with the democratization of robot-assisted surgery, new modalities, such as kinematics, are now accessible. Some previous methods use these new modalities as input for their models, but their added value has rarely been studied. This paper presents the design and results of the "PEg TRAnsfer Workflow recognition" (PETRAW) challenge with the objective of developing surgical workflow recognition methods based on one or more modalities and studying their added value. METHODS The PETRAW challenge included a data set of 150 peg transfer sequences performed on a virtual simulator. This data set included videos, kinematic data, semantic segmentation data, and annotations, which described the workflow at three levels of granularity: phase, step, and activity. Five tasks were proposed to the participants: three were related to the recognition at all granularities simultaneously using a single modality, and two addressed the recognition using multiple modalities. The mean application-dependent balanced accuracy (AD-Accuracy) was used as an evaluation metric to take into account class balance and is more clinically relevant than a frame-by-frame score. RESULTS Seven teams participated in at least one task with four participating in every task. The best results were obtained by combining video and kinematic data (AD-Accuracy of between 93% and 90% for the four teams that participated in all tasks). CONCLUSION The improvement of surgical workflow recognition methods using multiple modalities compared with unimodal methods was significant for all teams. However, the longer execution time required for video/kinematic-based methods(compared to only kinematic-based methods) must be considered. Indeed, one must ask if it is wise to increase computing time by 2000 to 20,000% only to increase accuracy by 3%. The PETRAW data set is publicly available at www.synapse.org/PETRAW to encourage further research in surgical workflow recognition.
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Affiliation(s)
- Arnaud Huaulmé
- Univ Rennes, INSERM, LTSI - UMR 1099, Rennes, F35000, France.
| | - Kanako Harada
- Department of Mechanical Engineering, the University of Tokyo, Tokyo 113-8656, Japan
| | | | - Bogyu Park
- VisionAI hutom, Seoul, Republic of Korea
| | | | | | | | | | - Yonghao Long
- Department of Computer Science & Engineering, The Chinese University of Hong Kong, Hong Kong
| | - Qi Dou
- Department of Computer Science & Engineering, The Chinese University of Hong Kong, Hong Kong
| | | | | | - Ren Hongliang
- National University of Singapore, Singapore, Singapore; The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Hiroki Matsuzaki
- National Cancer Center Japan East Hospital, Tokyo 104-0045, Japan
| | - Yuto Ishikawa
- National Cancer Center Japan East Hospital, Tokyo 104-0045, Japan
| | - Yuriko Harai
- National Cancer Center Japan East Hospital, Tokyo 104-0045, Japan
| | | | - Manoru Mitsuishi
- Department of Mechanical Engineering, the University of Tokyo, Tokyo 113-8656, Japan
| | - Pierre Jannin
- Univ Rennes, INSERM, LTSI - UMR 1099, Rennes, F35000, France.
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4
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Kitaguchi D, Teramura K, Matsuzaki H, Hasegawa H, Takeshita N, Ito M. Automatic purse-string suture skill assessment in transanal total mesorectal excision using deep learning-based video analysis. BJS Open 2023; 7:7071650. [PMID: 36882082 PMCID: PMC9991500 DOI: 10.1093/bjsopen/zrac176] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 11/07/2022] [Accepted: 12/18/2022] [Indexed: 03/09/2023] Open
Abstract
BACKGROUND Purse-string suture in transanal total mesorectal excision is a key procedural step. The aims of this study were to develop an automatic skill assessment system for purse-string suture in transanal total mesorectal excision using deep learning and to evaluate the reliability of the score output from the proposed system. METHODS Purse-string suturing extracted from consecutive transanal total mesorectal excision videos was manually scored using a performance rubric scale and computed into a deep learning model as training data. Deep learning-based image regression analysis was performed, and the purse-string suture skill scores predicted by the trained deep learning model (artificial intelligence score) were output as continuous variables. The outcomes of interest were the correlation, assessed using Spearman's rank correlation coefficient, between the artificial intelligence score and the manual score, purse-string suture time, and surgeon's experience. RESULTS Forty-five videos obtained from five surgeons were evaluated. The mean(s.d.) total manual score was 9.2(2.7) points, the mean(s.d.) total artificial intelligence score was 10.2(3.9) points, and the mean(s.d.) absolute error between the artificial intelligence and manual scores was 0.42(0.39). Further, the artificial intelligence score significantly correlated with the purse-string suture time (correlation coefficient = -0.728) and surgeon's experience (P< 0.001). CONCLUSION An automatic purse-string suture skill assessment system using deep learning-based video analysis was shown to be feasible, and the results indicated that the artificial intelligence score was reliable. This application could be expanded to other endoscopic surgeries and procedures.
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Affiliation(s)
- Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, Chiba, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, Chiba, Japan
| | - Koichi Teramura
- Department of Colorectal Surgery, National Cancer Center Hospital East, Chiba, Japan
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, Chiba, Japan
| | - Hiro Hasegawa
- Surgical Device Innovation Office, National Cancer Center Hospital East, Chiba, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, Chiba, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, Chiba, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, Chiba, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, Chiba, Japan
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5
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Takeshita N, Sakamoto S, Kitaguchi D, Takeshita N, Yajima S, Koike T, Ishikawa Y, Matsuzaki H, Mori K, Masuda H, Ichikawa T, Ito M. Deep Learning-Based Seminal Vesicle and Vas Deferens Recognition in the Posterior Approach of Robot-Assisted Radical Prostatectomy. Urology 2023; 173:98-103. [PMID: 36572225 DOI: 10.1016/j.urology.2022.12.006] [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: 09/01/2022] [Revised: 11/24/2022] [Accepted: 12/04/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To develop a convolutional neural network to recognize the seminal vesicle and vas deferens (SV-VD) in the posterior approach of robot-assisted radical prostatectomy (RARP) and assess the performance of the convolutional neural network model under clinically relevant conditions. METHODS Intraoperative videos of robot-assisted radical prostatectomy performed by the posterior approach from 3 institutions were obtained between 2019 and 2020. Using SV-VD dissection videos, semantic segmentation of the seminal vesicle-vas deferens area was performed using a convolutional neural network-based approach. The dataset was split into training and test data in a 10:3 ratio. The average time required by 6 novice urologists to correctly recognize the SV-VD was compared using intraoperative videos with and without segmentation masks generated by the convolutional neural network model, which was evaluated with the test data using the Dice similarity coefficient. Training and test datasets were compared using the Mann-Whitney U-test and chi-square test. Time required to recognize the SV-VD was evaluated using the Mann-Whitney U-test. RESULTS From 26 patient videos, 1 040 images were created (520 SV-VD annotated images and 520 SV-VD non-displayed images). The convolutional neural network model had a Dice similarity coefficient value of 0.73 in the test data. Compared with original videos, videos with the generated segmentation mask promoted significantly faster seminal vesicle and vas deferens recognition (P < .001). CONCLUSION The convolutional neural network model provides accurate recognition of the SV-VD in the posterior approach RARP, which may be helpful, especially for novice urologists.
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Affiliation(s)
- Nobushige Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan; Department of Urology, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan; Department of Urology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Shinichi Sakamoto
- Department of Urology, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan
| | - Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Shugo Yajima
- Department of Urology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Tatsuki Koike
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Yuto Ishikawa
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Kensaku Mori
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan
| | - Hitoshi Masuda
- Department of Urology, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Tomohiko Ichikawa
- Department of Urology, Graduate School of Medicine, Chiba University, Chuo-ku, Chiba, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwa, Chiba, Japan.
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6
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Sasaki K, Ito M, Kobayashi S, Kitaguchi D, Matsuzaki H, Kudo M, Hasegawa H, Takeshita N, Sugimoto M, Mitsunaga S, Gotohda N. Automated surgical workflow identification by artificial intelligence in laparoscopic hepatectomy: Experimental research. Int J Surg 2022; 105:106856. [PMID: 36031068 DOI: 10.1016/j.ijsu.2022.106856] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Accepted: 08/19/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND To perform accurate laparoscopic hepatectomy (LH) without injury, novel intraoperative systems of computer-assisted surgery (CAS) for LH are expected. Automated surgical workflow identification is a key component for developing CAS systems. This study aimed to develop a deep-learning model for automated surgical step identification in LH. MATERIALS AND METHODS We constructed a dataset comprising 40 cases of pure LH videos; 30 and 10 cases were used for the training and testing datasets, respectively. Each video was divided into 30 frames per second as static images. LH was divided into nine surgical steps (Steps 0-8), and each frame was annotated as being within one of these steps in the training set. After extracorporeal actions (Step 0) were excluded from the video, two deep-learning models of automated surgical step identification for 8-step and 6-step models were developed using a convolutional neural network (Models 1 & 2). Each frame in the testing dataset was classified using the constructed model performed in real-time. RESULTS Above 8 million frames were annotated for surgical step identification from the pure LH videos. The overall accuracy of Model 1 was 0.891, which was increased to 0.947 in Model 2. Median and average accuracy for each case in Model 2 was 0.927 (range, 0.884-0.997) and 0.937 ± 0.04 (standardized difference), respectively. Real-time automated surgical step identification was performed at 21 frames per second. CONCLUSIONS We developed a highly accurate deep-learning model for surgical step identification in pure LH. Our model could be applied to intraoperative systems of CAS.
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Affiliation(s)
- Kimimasa Sasaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan; Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan; Course of Advanced Clinical Research of Cancer, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-Ward, Tokyo, 113-8421, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan.
| | - Shin Kobayashi
- Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Masashi Kudo
- Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Hiro Hasegawa
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Motokazu Sugimoto
- Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Shuichi Mitsunaga
- Course of Advanced Clinical Research of Cancer, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-Ward, Tokyo, 113-8421, Japan; Department of Hepatobiliary and Pancreatic Oncology, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan
| | - Naoto Gotohda
- Department of Hepatobiliary and Pancreatic Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa-City, Chiba, 277-8577, Japan; Course of Advanced Clinical Research of Cancer, Juntendo University Graduate School of Medicine, 2-1-1, Hongo, Bunkyo-Ward, Tokyo, 113-8421, Japan
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7
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Hori K, Ikematsu H, Yamamoto Y, Matsuzaki H, Takeshita N, Shinmura K, Yoda Y, Kiuchi T, Takemoto S, Yokota H, Yano T. Detecting colon polyps in endoscopic images using artificial intelligence constructed with automated collection of annotated images from an endoscopy reporting system. Dig Endosc 2022; 34:1021-1029. [PMID: 34748658 DOI: 10.1111/den.14185] [Citation(s) in RCA: 1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 11/02/2021] [Accepted: 11/05/2021] [Indexed: 12/28/2022]
Abstract
BACKGROUND Artificial intelligence (AI) has made considerable progress in image recognition, especially in the analysis of endoscopic images. The availability of large-scale annotated datasets has contributed to the recent progress in this field. Datasets of high-quality annotated endoscopic images are widely available, particularly in Japan. A system for collecting annotated data reported daily could aid in accumulating a significant number of high-quality annotated datasets. AIM We assessed the validity of using daily annotated endoscopic images in a constructed reporting system for a prototype AI model for polyp detection. METHODS We constructed an automated collection system for daily annotated datasets from an endoscopy reporting system. The key images were selected and annotated for each case only during daily practice, not to be performed retrospectively. We automatically extracted annotated endoscopic images of diminutive colon polyps that had been diagnosed (study period March-September 2018) using the keywords of diagnostic information, and additionally collect the normal colon images. The collected dataset was devised into training and validation to build and evaluate the AI system. The detection model was developed using a deep learning algorithm, RetinaNet. RESULTS The automated system collected endoscopic images (47,391) from colonoscopies (745), and extracted key colon polyp images (1356) with localized annotations. The sensitivity, specificity, and accuracy of our AI model were 97.0%, 97.7%, and 97.3% (n = 300), respectively. CONCLUSION The automated system enabled the development of a high-performance colon polyp detector using images in endoscopy reporting system without the efforts of retrospective annotation works.
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Affiliation(s)
- Keisuke Hori
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japan.,Division of Science and Technology for Endoscopy, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center Hospital East, Chiba, Japan
| | - Hiroaki Ikematsu
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japan.,Division of Science and Technology for Endoscopy, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center Hospital East, Chiba, Japan
| | - Yoichi Yamamoto
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japan
| | - Hiroki Matsuzaki
- Medical Device Innovation Center, National Cancer Center Hospital East, Chiba, Japan
| | - Nobuyoshi Takeshita
- Medical Device Innovation Center, National Cancer Center Hospital East, Chiba, Japan
| | - Kensuke Shinmura
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japan
| | - Yusuke Yoda
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japan.,Medical Device Innovation Center, National Cancer Center Hospital East, Chiba, Japan
| | - Takayoshi Kiuchi
- System Engineering Division, FUJIFILM Medical IT Solutions Co., Ltd., Tokyo, Japan
| | - Satoko Takemoto
- Image Processing Research Team, RIKEN Center for Advanced Photonics, Saitama, Japan
| | - Hideo Yokota
- Image Processing Research Team, RIKEN Center for Advanced Photonics, Saitama, Japan.,Advanced Data Science Project, RIKEN Information R&D and Strategy Headquarters, Saitama, Japan
| | - Tomonori Yano
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Chiba, Japan.,Medical Device Innovation Center, National Cancer Center Hospital East, Chiba, Japan
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8
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Kitaguchi D, Takeshita N, Matsuzaki H, Igaki T, Hasegawa H, Ito M. Development and Validation of a 3-Dimensional Convolutional Neural Network for Automatic Surgical Skill Assessment Based on Spatiotemporal Video Analysis. JAMA Netw Open 2021; 4:e2120786. [PMID: 34387676 PMCID: PMC8363914 DOI: 10.1001/jamanetworkopen.2021.20786] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
IMPORTANCE A high level of surgical skill is essential to prevent intraoperative problems. One important aspect of surgical education is surgical skill assessment, with pertinent feedback facilitating efficient skill acquisition by novices. OBJECTIVES To develop a 3-dimensional (3-D) convolutional neural network (CNN) model for automatic surgical skill assessment and to evaluate the performance of the model in classification tasks by using laparoscopic colorectal surgical videos. DESIGN, SETTING, AND PARTICIPANTS This prognostic study used surgical videos acquired prior to 2017. In total, 650 laparoscopic colorectal surgical videos were provided for study purposes by the Japan Society for Endoscopic Surgery, and 74 were randomly extracted. Every video had highly reliable scores based on the Endoscopic Surgical Skill Qualification System (ESSQS, range 1-100, with higher scores indicating greater surgical skill) established by the society. Data were analyzed June to December 2020. MAIN OUTCOMES AND MEASURES From the groups with scores less than the difference between the mean and 2 SDs, within the range spanning the mean and 1 SD, and greater than the sum of the mean and 2 SDs, 17, 26, and 31 videos, respectively, were randomly extracted. In total, 1480 video clips with a length of 40 seconds each were extracted for each surgical step (medial mobilization, lateral mobilization, inferior mesenteric artery transection, and mesorectal transection) and separated into 1184 training sets and 296 test sets. Automatic surgical skill classification was performed based on spatiotemporal video analysis using the fully automated 3-D CNN model, and classification accuracies and screening accuracies for the groups with scores less than the mean minus 2 SDs and greater than the mean plus 2 SDs were calculated. RESULTS The mean (SD) ESSQS score of all 650 intraoperative videos was 66.2 (8.6) points and for the 74 videos used in the study, 67.6 (16.1) points. The proposed 3-D CNN model automatically classified video clips into groups with scores less than the mean minus 2 SDs, within 1 SD of the mean, and greater than the mean plus 2 SDs with a mean (SD) accuracy of 75.0% (6.3%). The highest accuracy was 83.8% for the inferior mesenteric artery transection. The model also screened for the group with scores less than the mean minus 2 SDs with 94.1% sensitivity and 96.5% specificity and for group with greater than the mean plus 2 SDs with 87.1% sensitivity and 86.0% specificity. CONCLUSIONS AND RELEVANCE The results of this prognostic study showed that the proposed 3-D CNN model classified laparoscopic colorectal surgical videos with sufficient accuracy to be used for screening groups with scores greater than the mean plus 2 SDs and less than the mean minus 2 SDs. The proposed approach was fully automatic and easy to use for various types of surgery, and no special annotations or kinetics data extraction were required, indicating that this approach warrants further development for application to automatic surgical skill assessment.
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Affiliation(s)
- Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Takahiro Igaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Hiro Hasegawa
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
- Department of Colorectal Surgery, National Cancer Center Hospital East, Kashiwanoha, Kashiwa, Chiba, Japan
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9
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Wallner A, Froehlich MB, Hotchkis MAC, Kinoshita N, Paul M, Martschini M, Pavetich S, Tims SG, Kivel N, Schumann D, Honda M, Matsuzaki H, Yamagata T. 60Fe and 244Pu deposited on Earth constrain the r-process yields of recent nearby supernovae. Science 2021; 372:742-745. [PMID: 33986180 DOI: 10.1126/science.aax3972] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 04/12/2021] [Indexed: 11/02/2022]
Abstract
Half of the chemical elements heavier than iron are produced by the rapid neutron capture process (r-process). The sites and yields of this process are disputed, with candidates including some types of supernovae (SNe) and mergers of neutron stars. We search for two isotopic signatures in a sample of Pacific Ocean crust-iron-60 (60Fe) (half-life, 2.6 million years), which is predominantly produced in massive stars and ejected in supernova explosions, and plutonium-244 (244Pu) (half-life, 80.6 million years), which is produced solely in r-process events. We detect two distinct influxes of 60Fe to Earth in the last 10 million years and accompanying lower quantities of 244Pu. The 244Pu/60Fe influx ratios are similar for both events. The 244Pu influx is lower than expected if SNe dominate r-process nucleosynthesis, which implies some contribution from other sources.
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Affiliation(s)
- A Wallner
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia. .,Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany
| | - M B Froehlich
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - M A C Hotchkis
- Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234, Australia
| | - N Kinoshita
- Institute of Technology, Shimizu Corporation, Tokyo 135-8530, Japan
| | - M Paul
- Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - M Martschini
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - S Pavetich
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - S G Tims
- Department of Nuclear Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia
| | - N Kivel
- Laboratory of Radiochemistry, Department for Nuclear Energy and Safety, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - D Schumann
- Laboratory of Radiochemistry, Department for Nuclear Energy and Safety, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - M Honda
- Graduate School of Pure and Applied Sciences, University of Tsukuba, Ibaraki 305-8577, Japan
| | - H Matsuzaki
- Micro Analysis Laboratory, Tandem Accelerator, The University Museum, The University of Tokyo, Tokyo 113-0032, Japan
| | - T Yamagata
- Micro Analysis Laboratory, Tandem Accelerator, The University Museum, The University of Tokyo, Tokyo 113-0032, Japan
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10
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Kitaguchi D, Takeshita N, Matsuzaki H, Hasegawa H, Igaki T, Oda T, Ito M. Deep learning-based automatic surgical step recognition in intraoperative videos for transanal total mesorectal excision. Surg Endosc 2021; 36:1143-1151. [PMID: 33825016 PMCID: PMC8758657 DOI: 10.1007/s00464-021-08381-6] [Citation(s) in RCA: 4] [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: 08/04/2020] [Accepted: 02/09/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND Dividing a surgical procedure into a sequence of identifiable and meaningful steps facilitates intraoperative video data acquisition and storage. These efforts are especially valuable for technically challenging procedures that require intraoperative video analysis, such as transanal total mesorectal excision (TaTME); however, manual video indexing is time-consuming. Thus, in this study, we constructed an annotated video dataset for TaTME with surgical step information and evaluated the performance of a deep learning model in recognizing the surgical steps in TaTME. METHODS This was a single-institutional retrospective feasibility study. All TaTME intraoperative videos were divided into frames. Each frame was manually annotated as one of the following major steps: (1) purse-string closure; (2) full thickness transection of the rectal wall; (3) down-to-up dissection; (4) dissection after rendezvous; and (5) purse-string suture for stapled anastomosis. Steps 3 and 4 were each further classified into four sub-steps, specifically, for dissection of the anterior, posterior, right, and left planes. A convolutional neural network-based deep learning model, Xception, was utilized for the surgical step classification task. RESULTS Our dataset containing 50 TaTME videos was randomly divided into two subsets for training and testing with 40 and 10 videos, respectively. The overall accuracy obtained for all classification steps was 93.2%. By contrast, when sub-step classification was included in the performance analysis, a mean accuracy (± standard deviation) of 78% (± 5%), with a maximum accuracy of 85%, was obtained. CONCLUSIONS To the best of our knowledge, this is the first study based on automatic surgical step classification for TaTME. Our deep learning model self-learned and recognized the classification steps in TaTME videos with high accuracy after training. Thus, our model can be applied to a system for intraoperative guidance or for postoperative video indexing and analysis in TaTME procedures.
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Affiliation(s)
- Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Hiro Hasegawa
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Takahiro Igaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Tatsuya Oda
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, 305-8575, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan. .,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
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11
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Tan SPV, Bautista AT, Mendoza NDS, Racadio CDT, Puthenpurekal M, Resurreccion AC, Matsuzaki H. Iodine-129 for determining the origin of salinity in groundwater in Pampanga, Philippines. J Environ Radioact 2020; 218:106239. [PMID: 32421573 DOI: 10.1016/j.jenvrad.2020.106239] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 06/11/2023]
Abstract
Assessing groundwater vulnerability from salinity contamination is vital and relevant to meet the increasing demand for freshwater. Iodine-129 (129I, half-life = 15.7 million years), a radioisotope of iodine, was used as an environmental tracer for the possible origin of salinization in groundwater (e.g., natural rock weathering, evaporated water, seawater, brine fossil water, contamination). In July 2017 (wet season), thirty-two (32) water samples were taken from production wells of different localities in Pampanga, a province in the Philippines that relies heavily on groundwater for freshwater sources. Hydrogeochemical (mainly Cl) and stable water isotopes (δ2H and δ18O) were able to identify seven samples potentially affected by seawater intrusion. The salinity origin of these samples was investigated using iodine-129 and iodine-127 isotopes by generating two graphs: 129I vs. chloride and 129I/127I ratio vs. 1/127I. 129I vs. Cl graph was capable of showing a clear distinction between different salinity origins. Five out of the seven samples were being affected by evaporated water, one sample from possible wastewater, and one sample from brine fossil water. A conceptual model was produced to summarize the results. Compiled end-members (e.g., natural brine, seawater, modern rain) were plotted in the 129I/127I ratio vs. 1/127I graph to show the interaction between two recharge sources. The results of this study will be helpful to the government, civil society, and other organizations for monitoring, policymaking, and management of the groundwater and the subsurface formations that will be crucial to continuously supply the freshwater needs of the present and future generation.
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Affiliation(s)
- S P V Tan
- Environmental Engineering Program, University of the Philippines, Quezon City, 1101, Philippines.
| | - A T Bautista
- Department of Science and Technology - Philippine Nuclear Research Institute (DOST-PNRI), Quezon City, 1101, Philippines
| | - N D S Mendoza
- Department of Science and Technology - Philippine Nuclear Research Institute (DOST-PNRI), Quezon City, 1101, Philippines
| | - C D T Racadio
- Department of Science and Technology - Philippine Nuclear Research Institute (DOST-PNRI), Quezon City, 1101, Philippines
| | - M Puthenpurekal
- Department of Environment and Natural Resources - Mines and Geosciences Bureau (DENR-MGB), Quezon City, 1100, Philippines
| | - A C Resurreccion
- Environmental Engineering Program, University of the Philippines, Quezon City, 1101, Philippines
| | - H Matsuzaki
- Micro Analysis Laboratory, Tandem Accelerator (MALT), University of Tokyo, Bunkyo-ku, 113-8654, Japan
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12
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Inaba A, Hori K, Yoda Y, Ikematsu H, Takano H, Matsuzaki H, Watanabe Y, Takeshita N, Tomioka T, Ishii G, Fujii S, Hayashi R, Yano T. Artificial intelligence system for detecting superficial laryngopharyngeal cancer with high efficiency of deep learning. Head Neck 2020; 42:2581-2592. [PMID: 32542892 DOI: 10.1002/hed.26313] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 04/18/2020] [Accepted: 05/15/2020] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND There are no published reports evaluating the ability of artificial intelligence (AI) in the endoscopic diagnosis of superficial laryngopharyngeal cancer (SLPC). We presented our newly developed diagnostic AI model for SLPC detection. METHODS We used RetinaNet for object detection. SLPC and normal laryngopharyngeal mucosal images obtained from narrow-band imaging were used for the learning and validation data sets. Each independent data set comprised 400 SLPC and 800 normal mucosal images. The diagnostic AI model was constructed stage-wise and evaluated at each learning stage using validation data sets. RESULTS In the validation data sets (100 SLPC cases), the median tumor size was 13.2 mm; flat/elevated/depressed types were found in 77/21/2 cases. Sensitivity, specificity, and accuracy improved each time a learning image was added and were 95.5%, 98.4%, and 97.3%, respectively, after learning all SLPC and normal mucosal images. CONCLUSIONS The novel AI model is helpful for detection of laryngopharyngeal cancer at an early stage.
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Affiliation(s)
- Atsushi Inaba
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Kashiwa, Chiba, Japan.,Course of Advanced Clinical Research of Cancer, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Keisuke Hori
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Yusuke Yoda
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Kashiwa, Chiba, Japan.,Medical Device Innovation Center, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Hiroaki Ikematsu
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Kashiwa, Chiba, Japan.,Division of Science and Technology for Endoscopy, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center East, Kashiwa, Chiba, Japan
| | - Hiroaki Takano
- Medical Device Innovation Center, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Hiroki Matsuzaki
- Medical Device Innovation Center, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Yoshiki Watanabe
- Department of Medical Information, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Nobuyoshi Takeshita
- Medical Device Innovation Center, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Toshifumi Tomioka
- Department of Head and Neck Surgery, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Genichiro Ishii
- Course of Advanced Clinical Research of Cancer, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan.,Division of Pathology, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center East, Kashiwa, Chiba, Japan
| | - Satoshi Fujii
- Division of Pathology, Exploratory Oncology Research & Clinical Trial Center, National Cancer Center East, Kashiwa, Chiba, Japan
| | - Ryuichi Hayashi
- Department of Head and Neck Surgery, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - Tomonori Yano
- Department of Gastroenterology and Endoscopy, National Cancer Center Hospital East, Kashiwa, Chiba, Japan.,Medical Device Innovation Center, National Cancer Center Hospital East, Kashiwa, Chiba, Japan
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13
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Kitaguchi D, Takeshita N, Matsuzaki H, Hasegawa H, Honda R, Teramura K, Oda T, Ito M. Computer-assisted real-time automatic prostate segmentation during TaTME: a single-center feasibility study. Surg Endosc 2020; 35:2493-2499. [PMID: 32430531 DOI: 10.1007/s00464-020-07659-5] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 05/15/2020] [Indexed: 01/17/2023]
Abstract
BACKGROUND Urethral injuries (UIs) are significant complications pertaining to transanal total mesorectal excision (TaTME). It is important for surgeons to identify the prostate during TaTME to prevent UI occurrence; intraoperative image navigation could be considered useful in this regard. This study aims at developing a deep learning model for real-time automatic prostate segmentation based on intraoperative video during TaTME. The proposed model's performance has been evaluated. METHODS This was a single-institution retrospective feasibility study. Semantic segmentation of the prostate area was performed using a convolutional neural network (CNN)-based approach. DeepLab v3 plus was utilized as the CNN model for the semantic segmentation task. The Dice coefficient (DC), which is calculated based on the overlapping area between the ground truth and predicted area, was utilized as an evaluation metric for the proposed model. RESULTS Five hundred prostate images were randomly extracted from 17 TaTME videos, and the prostate area was manually annotated on each image. Fivefold cross-validation tests were performed, and as observed, the average DC value equaled 0.71 ± 0.04, the maximum value being 0.77. Additionally, the model operated at 11 fps, which provides acceptable real-time performance. CONCLUSIONS To the best of the authors' knowledge, this is the first effort toward realization of computer-assisted TaTME, and results obtained in this study suggest that the proposed deep learning model can be utilized for real-time automatic prostate segmentation. In future endeavors, the accuracy and performance of the proposed model will be improved to enable its use in practical applications, and its capability to reduce UI risks during TaTME will be verified.
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Affiliation(s)
- Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan. .,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Hiro Hasegawa
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Ryoya Honda
- Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Koichi Teramura
- Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Tatsuya Oda
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan. .,Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
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14
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Kitaguchi D, Takeshita N, Matsuzaki H, Oda T, Watanabe M, Mori K, Kobayashi E, Ito M. Automated laparoscopic colorectal surgery workflow recognition using artificial intelligence: Experimental research. Int J Surg 2020; 79:88-94. [PMID: 32413503 DOI: 10.1016/j.ijsu.2020.05.015] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [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: 03/06/2020] [Revised: 05/01/2020] [Accepted: 05/05/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Identifying laparoscopic surgical videos using artificial intelligence (AI) facilitates the automation of several currently time-consuming manual processes, including video analysis, indexing, and video-based skill assessment. This study aimed to construct a large annotated dataset comprising laparoscopic colorectal surgery (LCRS) videos from multiple institutions and evaluate the accuracy of automatic recognition for surgical phase, action, and tool by combining this dataset with AI. MATERIALS AND METHODS A total of 300 intraoperative videos were collected from 19 high-volume centers. A series of surgical workflows were classified into 9 phases and 3 actions, and the area of 5 tools were assigned by painting. More than 82 million frames were annotated for a phase and action classification task, and 4000 frames were annotated for a tool segmentation task. Of these frames, 80% were used for the training dataset and 20% for the test dataset. A convolutional neural network (CNN) was used to analyze the videos. Intersection over union (IoU) was used as the evaluation metric for tool recognition. RESULTS The overall accuracies for the automatic surgical phase and action classification task were 81.0% and 83.2%, respectively. The mean IoU for the automatic tool segmentation task for 5 tools was 51.2%. CONCLUSIONS A large annotated dataset of LCRS videos was constructed, and the phase, action, and tool were recognized with high accuracy using AI. Our dataset has potential uses in medical applications such as automatic video indexing and surgical skill assessments. Open research will assist in improving CNN models by making our dataset available in the field of computer vision.
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Affiliation(s)
- Daichi Kitaguchi
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan; Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan; Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Nobuyoshi Takeshita
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan; Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
| | - Hiroki Matsuzaki
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
| | - Tatsuya Oda
- Department of Gastrointestinal and Hepato-Biliary-Pancreatic Surgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan
| | - Masahiko Watanabe
- Department of Surgery, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0374, Japan
| | - Kensaku Mori
- Graduate School of Informatics, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi, 464-8601, Japan
| | - Etsuko Kobayashi
- Institute of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo, 162-8666, Japan
| | - Masaaki Ito
- Surgical Device Innovation Office, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan; Department of Colorectal Surgery, National Cancer Center Hospital East, 6-5-1 Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan.
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15
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Tsuji S, Matsuzaki H, Iseki M, Nagasu A, Hirano H, Ishihara K, Ueda N, Honda Y, Horiuchi T, Nishikomori R, Morita Y, Mukai T. Functional analysis of a novel G87V TNFRSF1A mutation in patients with TNF receptor-associated periodic syndrome. Clin Exp Immunol 2019; 198:416-429. [PMID: 31429073 DOI: 10.1111/cei.13365] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2019] [Indexed: 12/17/2022] Open
Abstract
Tumor necrosis factor (TNF) receptor-associated periodic syndrome (TRAPS) is an autoinflammatory disease that is caused by heterozygous mutations in the TNFRSF1A gene. Although more than 150 TNFRSF1A mutations have been reported to be associated with TRAPS phenotypes only a few, such as p.Thr79Met (T79M) and cysteine mutations, have been functionally analyzed. We identified two TRAPS patients in one family harboring a novel p.Gly87Val (G87V) mutation in addition to a p.Thr90Ile (T90I) mutation in TNFRSF1A. In this study, we examined the functional features of this novel G87V mutation. In-vitro analyses using mutant TNF receptor 1 (TNF-R1)-over-expressing cells demonstrated that this mutation alters the expression and function of TNF-R1 similar to that with the previously identified pathogenic T79M mutation. Specifically, cell surface expression of the mutant TNF-R1 in transfected cells was inhibited with both G87V and T79M mutations, whereas the T90I mutation did not affect this. Moreover, peripheral blood mononuclear cells (PBMCs) from TRAPS patients harboring the G87V and T90I mutations showed increased mitochondrial reactive oxygen species (ROS). Furthermore, the effect of various Toll-like receptor (TLR) ligands on inflammatory responses was explored, revealing that PBMCs from TRAPS patients are hyper-responsive to TLR-2 and TLR-4 ligands and that interleukin (IL)-8 and granulocyte-macrophage colony-stimulating factor (GM-CSF) are likely to be involved in the pathogenesis of TRAPS. These findings suggest that the newly identified G87V mutation is one of the causative mutations of TRAPS. Our findings based on unique TRAPS-associated mutations provide novel insight for clearer understanding of inflammatory responses, which would be basic findings of developing a new therapeutic and prophylactic approach to TRAPS.
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Affiliation(s)
- S Tsuji
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - H Matsuzaki
- Department of Life Sciences, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, Shobara, Hiroshima, Japan
| | - M Iseki
- Department of Immunology and Molecular Genetics, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - A Nagasu
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - H Hirano
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - K Ishihara
- Department of Immunology and Molecular Genetics, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - N Ueda
- Department of Internal Medicine, Miyazaki Prefectural Miyazaki Hospital, Miyazaki, Japan
| | - Y Honda
- Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - T Horiuchi
- Department of Internal Medicine, Kyushu University Beppu Hospital, Beppu, Oita, Japan
| | - R Nishikomori
- Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Pediatrics and Child Health, Kurume University School of Medicine, Kurume, Fukuoka, Japan
| | - Y Morita
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
| | - T Mukai
- Department of Rheumatology, Kawasaki Medical School, Kurashiki, Okayama, Japan
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16
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Tamanuki T, Namura M, Aoyagi T, Shimizu S, Suwa T, Matsuzaki H. Efficacy of using imprint and exfoliative cytology followed by frozen section as intraoperative margin assessment in breast conservation surgery. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz098.015] [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: 11/12/2022] Open
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17
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Shimamura M, Shibusawa N, Kurashige T, Mussazhanova Z, Matsuzaki H, Nakashima M, Yamada M, Nagayama Y. Mouse models of sporadic thyroid cancer derived from BRAFV600E alone or in combination with PTEN haploinsufficiency under physiologic TSH levels. PLoS One 2018; 13:e0201365. [PMID: 30086162 PMCID: PMC6080762 DOI: 10.1371/journal.pone.0201365] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 10/31/2017] [Accepted: 07/13/2018] [Indexed: 01/01/2023] Open
Abstract
The BRAFV600E mutation is the most prevalent driver mutation of sporadic papillary thyroid cancers (PTC). It was previously shown that prenatal or postnatal expression of BRAFV600E under elevated TSH levels induced thyroid cancers in several genetically engineered mouse models. In contrast, we found that postnatal expression of BRAFV600E under physiologic TSH levels failed to develop thyroid cancers in conditional transgenic Tg(LNL-BrafV600E) mice injected in the thyroid with adenovirus expressing Cre under control of the thyroglobulin promoter (Ad-TgP-Cre). In this study, we first demonstrated that BrafCA/+ mice carrying a Cre-activated allele of BrafV600E exhibited higher transformation efficiency than Tg(LNL-BrafV600E) mice when crossed with TPO-Cre mice. As a result, most BrafCA/+ mice injected with Ad-TgP-Cre developed thyroid cancers in 1 year. Histologic examination showed follicular or cribriform-like structures with positive TG and PAX staining and no colloid formation. Some tumors also had papillary structure component with lower TG expression. Concomitant PTEN haploinsufficiency in injected BrafCA/+;Ptenf/+ mice induced tumors predominantly exhibiting papillary structures and occasionally undifferentiated solid patterns with normal to low PAX expression and low to absent TG expression. Typical nuclear features of human PTC and extrathyroidal invasion were observed primarily in the latter mice. The percentages of pERK-, Ki67- and TUNEL-positive cells were all higher in the latter. In conclusion, we established novel thyroid cancer mouse models in which postnatal expression of BRAFV600E alone under physiologic TSH levels induces PTC. Simultaneous PTEN haploinsufficiency tends to promote tumor growth and de-differentiation.
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Affiliation(s)
- Mika Shimamura
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Nobuyuki Shibusawa
- Department of Medicine and Molecular Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Tomomi Kurashige
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Zhanna Mussazhanova
- Department of Tumor and Diagnostic Pathology, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Hiroki Matsuzaki
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Masahiro Nakashima
- Department of Tumor and Diagnostic Pathology, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
| | - Masanobu Yamada
- Department of Medicine and Molecular Science, Graduate School of Medicine, Gunma University, Maebashi, Japan
| | - Yuji Nagayama
- Department of Molecular Medicine, Atomic Bomb Disease Institute, Nagasaki University, Nagasaki, Japan
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18
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Du L, Xi W, Zhang J, Matsuzaki H, Furube A. Electron transfer dynamics and yield from gold nanoparticle to different semiconductors induced by plasmon band excitation. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.04.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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19
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Motomura C, Matsuzaki H, Ono R, Iwata M, Okabe K, Akamine Y, Wakatsuki M, Murakami Y, Taba N, Odajima H. Aspirin is an enhancing factor for food-dependent exercise-induced anaphylaxis in children. Clin Exp Allergy 2017; 47:1497-1500. [PMID: 28892197 DOI: 10.1111/cea.13026] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- C Motomura
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - H Matsuzaki
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - R Ono
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - M Iwata
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - K Okabe
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - Y Akamine
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - M Wakatsuki
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - Y Murakami
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - N Taba
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - H Odajima
- Department of Pediatrics, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
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20
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Shinojima N, Matsuzaki H, Takeshima Y, Maenaka A, Makino K, Yamamoto K, Saito Y, Kuratsu J, Nakamura H, Yano S. P18.11 The effect of ketogenic diet on survival and quality of life in patients with malignant brain tumors in palliative care. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.475] [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: 11/13/2022] Open
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21
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Shinojima N, Matsuzaki H, Maenaka A, Makino K, Yamamoto K, Takeshima Y, Kuratsu J, Nakamura H, Yano S. P19.05 Safety and tumor inhibitory effect of ketogenic diet for pediatric patients with malignant brain tumors. Neuro Oncol 2017. [DOI: 10.1093/neuonc/nox036.485] [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: 11/14/2022] Open
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22
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Nakamura N, Miyazaki T, Matsuzaki H, Furuya R, Miyajima S, Irie S, Matsuoka H, Tanaka M. Experience of Quatro-Therapy With Everolimus to Minimize Calcineurin Inhibitor for Kidney Transplant Recipients. Transplant Proc 2017; 49:32-36. [PMID: 28104152 DOI: 10.1016/j.transproceed.2016.11.005] [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: 10/20/2022]
Abstract
BACKGROUND This study was divided into three phases, on the occasion of the introduction of everolimus (EVR) in our hospital. METHODS In the first phase, a study group of six maintenance patients (three living related donors, three deceased donors) who had a history of malignant disease with less than 500 mg/day of proteinuria were enrolled; a high serum creatinine and upper limit of duration after kidney transplant operation was not considered. EVR was discontinued in four of the six patients because of side effects or worsening renal function. The second phase comprised a study group of 12 maintenance patients (12 living related donors) who were more than 5 years after kidney transplant operation with serum creatinine <3 ng/mL and proteinuria <500 mg/day. In two patients, EVR was discontinued because of a skin rash or general fatigue, but EVR was continued in 10 cases. Calcineurin inhibitor (CNI) dosage was reduced and renal function improved, and mean estimated glomerular filtration rate recovered from 42.3 mL/min to 44.8 mL/min, with no rejections occurring. In the third phase, a study group of eight de novo transplant patients who were 2 to 3 weeks after transplant operation were examined. In one case, EVR was discontinued because of proteinuria but was restarted with a stepwise increasing method after 4 months and was continued without any side effects. RESULTS Our study indicates that EVR was a useful drug for the maintenance of kidney transplant recipients for the optimal patients. CONCLUSIONS In de novo cases, EVR plus a high dose of mizoribine and low CNI protocol was a useful regimen without serious adverse effects.
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Affiliation(s)
- N Nakamura
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan.
| | - T Miyazaki
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - H Matsuzaki
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - R Furuya
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - S Miyajima
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - S Irie
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - H Matsuoka
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
| | - M Tanaka
- Department of Urology, Fukuoka University Hospital, Fukuoka, Japan
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23
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Nakamura R, Matsuzaki H, Sakamoto M, Suda K, Hayama S, Sangai T. Abstract P1-07-15: The outcomes for super elderly patients over 80 years old after breast cancer surgery. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p1-07-15] [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: 11/16/2022]
Abstract
Abstract
(Purpose)
Considering the dramatic increase in average life expectancy throughout the world, the management of super-elderly patients over 80 years old (SEP) with breast cancer has become a global issue. However, there have been few clinical trials for SEP until now. The reasons for this were a small population, unpredictable prognosis, a large number of non-cancer-related deaths and a lower function of multiple organs in SEP. Surgical treatment or post-operative treatment based on evidence of clinical trials for SEP has also not been unclear. We hypothesized that the outcome of SEP with breast cancer compared with other ages were similarly depended on the breast cancer subtypes.
The aim of this study was to clarify the breast cancer related survival (BRS) rate and overall survival (OS) rate at 5years for SEP according to breast cancer subtype.
(Methods)
We retrospectively analyzed 407 patients over 80 years old at initial operation between April, 1994 and April 2015 from 4 institutions of Chiba Youth Breast Oncology Research Group.
Overall, 366 patients with stage I to Stage IIIc were included.
41 patients with Stage 0 or IV were excluded in this study.
We compared the clinical characteristics, OS and BRS rates among the breast cancer subtype: such as ER positive HER2 negative (ER group), ER negative HER2 negative (TN group), ER negative HER2 positive (HER2 group) and ER positive HER2 positive (ER/HER2 group).
Univariate and multivariate analyses were performed to identify the factors of Tumor size, Lymph node, Ly, ER, HER2 and characteristics, associated with the OS and BRS.
(Results)
The median age of the 366 patients was 83 years (range 80-96 years).The median follow-up duration was 32 months (range, 2-120).
During the follow-up period, 25 (9.4%) patients in the ER group, 19 (27.5%) in TN group, 4 (22.2%) in HER2 group and 2 (20.0%) patients in ER-HER2 group died.
The 5 year OS and BRS rates were 89.2%, 97.1% in ER group, 64.6%, 81.2% in TN group, 61.5%,33.3% in HER2 group and 83.3%, 100% in ER-HER2 group, respectively.
Univariate and multivariate analyses revealed that ER was one prognostic factor to OS and BRS.
ER positive patients treatment with Aromatase inhibitor had significantly longer survival rates than treatment with Tamoxifen or no treatment (p=0.05).
There were no significant differences in OS or BRS of TN patients according to the use of chemotherapy (n=7) versus non treatment (n=61).
(Conclusions)
The prognosis and clinical course of super elderly patients with breast cancer depended on subtype.
Adjuvant therapy for ER group was one prognostic factor to OS and BRS.
Citation Format: Nakamura R, Matsuzaki H, Sakamoto M, Suda K, Hayama S, Sangai T. The outcomes for super elderly patients over 80 years old after breast cancer surgery. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P1-07-15.
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Affiliation(s)
- R Nakamura
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - H Matsuzaki
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - M Sakamoto
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - K Suda
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - S Hayama
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
| | - T Sangai
- Chiba Cancer Center Hospital, Chiba, Japan; Funabashi Municipal Medical Center; Kameda Medical Center; Juntendou University Urayasu Hospital; Chiba University
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24
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Matsuzaki H, Iwata M, Miyamoto T, Terashige T, Iwano K, Takaishi S, Takamura M, Kumagai S, Yamashita M, Takahashi R, Wakabayashi Y, Okamoto H. Excitation-photon-energy selectivity of photoconversions in halogen-bridged Pd-chain compounds: Mott insulator to metal or charge-density-wave state. Phys Rev Lett 2014; 113:096403. [PMID: 25215998 DOI: 10.1103/physrevlett.113.096403] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Indexed: 06/03/2023]
Abstract
Ultrafast photoinduced transitions of a one-dimensional Mott insulator into two distinct electronic phases, metal and charge-density-wave (CDW) state, were achieved in a bromine-bridged Pd-chain compound [Pd(en)2Br](C5-Y)2H2O (en=ethylenediamine and C5-Y=dialkylsulfosuccinate), by selecting the photon energy of a femtosecond excitation pulse. For the resonant excitation of the Mott-gap transition, excitonic states are generated and converted to one-dimensional CDW domains. For the higher-energy excitation, free electron and hole carriers are produced, giving rise to a transition of the Mott insulator to a metal. Such selectivity in photoconversions by the choice of initial photoexcited states opens a new possibility for the developments of advanced optical switching and memory functions.
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Affiliation(s)
- H Matsuzaki
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - M Iwata
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - T Miyamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - T Terashige
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - K Iwano
- Institute of Materials Structure Science, Graduate University for Advanced Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan
| | - S Takaishi
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M Takamura
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - S Kumagai
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - M Yamashita
- Department of Chemistry, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - R Takahashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - Y Wakabayashi
- Division of Materials Physics, Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
| | - H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba 277-8561, Japan
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25
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Omori Y, Saeki H, Ito K, Matsuzaki H, Tokita M, Itoh M, Tanito K, Ishiji T, Fukunaga M, Nakagawa H. Solitary fibrous tumour of the scalp. Clin Exp Dermatol 2014; 39:539-41. [PMID: 24712870 DOI: 10.1111/ced.12309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2013] [Indexed: 11/28/2022]
Affiliation(s)
- Y Omori
- Department of Dermatology, The Jikei University School of Medicine, 3-25-8, Nishishimbashi, Minato-ku, Tokyo, 105-8461, Japan
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26
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Rampias T, Giagini A, Siolos S, Matsuzaki H, Sasaki C, Scorilas A, Psyrri A. RAS/PI3K Crosstalk and Cetuximab Resistance in Head and Neck Squamous Cell Carcinoma. Clin Cancer Res 2014; 20:2933-46. [DOI: 10.1158/1078-0432.ccr-13-2721] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [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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27
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Kitamura M, Araki K, Matsuzaki H, Okauchi T. Rhodium-Catalyzed Reaction of Diazonaphthoquinones and Enol Ethers: Synthesis of Dihydronaphthofuran Derivatives and α-Naphthyl Esters. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300712] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Fujita M, Matsuzaki H, Yanagi Y, Hara M, Katase N, Hisatomi M, Unetsubo T, Konouchi H, Nagatsuka H, Asaumi JI. Diagnostic value of MRI for odontogenic tumours. Dentomaxillofac Radiol 2013; 42:20120265. [PMID: 23468124 DOI: 10.1259/dmfr.20120265] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To evaluate the diagnostic value of MRI for odontogenic tumours. MATERIALS AND METHODS 51 patients with odontogenic tumours were subjected to pre-operative MRI examinations. For tumours with liquid components, i.e. ameloblastomas and keratocystic odontogenic tumours (KCOTs), the signal intensity (SI) uniformity of their cystic components (UΣ) was calculated and then their UΣ values were compared. For tumours with solid components that had been examined using dynamic contrast-enhanced MRI (DCE-MRI), their CImax (maximum contrast index), Tmax (the time when CImax occurred), CIpeak (CImax × 0.90), Tpeak (the time when CIpeak occurred) and CI300 (i.e. the CI observed at 300 s after contrast medium injection) values were determined from CI curves. We then classified the odontogenic tumours according to their DCE-MRI parameters. RESULTS Significant differences between the UΣ values of the ameloblastomas and KCOT were observed on T1 weighted images, T2 weighted images and short TI inversion recovery images. Depending on their DCE-MRI parameters, we classified the odontogenic tumours into the following five types: Type A, CIpeak > 2.0 and Tpeak < 200 s; Type B, CIpeak < 2.0 and Tpeak < 200 s; Type C, CI300 > 2.0 and Tmax < 600 s; Type D, CI300 > 2.0 and Tmax > 600 s; Type E, CI300 < 2.0 and Tmax > 600 s. CONCLUSION Cystic component SI uniformity was found to be useful for differentiating between ameloblastomas and KCOT. However, the DCE-MRI parameters of odontogenic tumours, except for odontogenic fibromas and odontogenic myxomas, contributed little to their differential diagnosis.
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Affiliation(s)
- M Fujita
- Department of Oral and Maxillofacial Radiology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama City, Okayama, Japan
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29
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Tao S, Ohtani N, Uchida R, Miyamoto T, Matsui Y, Yada H, Uemura H, Matsuzaki H, Uemura T, Takeya J, Okamoto H. Relaxation dynamics of photoexcited excitons in rubrene single crystals using femtosecond absorption spectroscopy. Phys Rev Lett 2012; 109:097403. [PMID: 23002882 DOI: 10.1103/physrevlett.109.097403] [Citation(s) in RCA: 8] [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: 10/24/2011] [Revised: 04/06/2012] [Indexed: 06/01/2023]
Abstract
The relaxation dynamics of an exciton in rubrene was investigated by femtosecond absorption spectroscopy. Exciton relaxation to a self-trapped state occurs via the coherent oscillation with 78 cm(-1) due to a coupled mode of molecular deformations with phenyl-side-group motions and molecular displacements. From the temperature dependence of the decay time of excitons, the energy necessary for an exciton to escape from a self-trapped state is evaluated to be ~35 meV (~400 K). As a result, a self-trapped exciton is stable at low temperatures. At room temperature, excitons can escape from a self-trapped state and, subsequently, they are dissociated to charged species. The exciton dissociation mechanism is discussed on the basis of the results.
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Affiliation(s)
- S Tao
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Chiba, Japan
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30
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Shibata T, Horie Y, Hayashi N, Endo S, Musha T, Matsuzaki H. P35-1 Application of neuronal activity topography to vascular cognitive impairment with carotid artery stenosis. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61271-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Pure cultures of the spirochætal causative agent of the disease known as Weil's disease, or febrile icterus, in Japan, have been obtained by us in a solid, a semisolid, and a fluid medium. The spirochæta thus isolated remains pathogenic for guinea pigs for many generations. Up to the present time we have succeeded through the courtesy of Professor Nagayo, Dr. Konuma, and Dr. Ishihara, in cultivating three different strains. The spirochæta is a facultative anaerobe. The solid and semisolid culture media possess one disadvantage, in that they are opaque on account of the addition of red blood corpuscles; but it is hoped that this drawback may soon be overcome by further studies. We shall report later the results of investigations regarding various questions in immunity as well as further details regarding the biological properties of the spirochæta.
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Affiliation(s)
- T Ito
- Chiba Medical College and the Chiba Hospital, Chiba, Japan
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32
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33
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Asaumi JI, Hisatomi M, Yanagi Y, Unetsubo T, Maki Y, Matsuzaki H, Honda Y, Konouchi H. Evaluation of panoramic radiographs taken at the initial visit at a department of paediatric dentistry. Dentomaxillofac Radiol 2008; 37:340-3. [PMID: 18757719 DOI: 10.1259/dmfr/31214423] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To examine oral and maxillofacial lesions other than those related to the chief complaint in panoramic radiographs taken at the department of paediatric dentistry at our hospital. METHODS We retrospectively reviewed all 1092 patients who had visited the department of paediatric dentistry at our hospital and had a panoramic radiograph taken between August 1999 and October 2004. The following information was obtained from the patients' files and panoramic radiographs: gender, age, chief complaints and the presence or absence of lesions. RESULTS Lesions were observed in 140 of the 1092 panoramic radiographs (12.8%). Among the 140 patients discovered to have lesions in the panoramic radiographs, 66 (47.1%, or 6.05% of the entire group of 1092 patients) had different lesions from those underlying the chief complaint. These 66 patients ages ranged from 3 years to 14 years and the lesions involved 39 (59.1%) missing teeth, 20 (30.3%) mesiodentes, 4 supernumerary teeth, 1 odontoma, 1 radicular cyst and 1 impacted tooth. The missing teeth were observed in the central and lateral incisor, canine, and first and second premolar positions of both jaws, especially in the lower lateral incisor and upper central incisor positions. CONCLUSIONS We were able to detect incidental lesions at a rate of 6.05% (66 of 1092 patients) and at a relatively early age (mean 6.8 years) in the present study. Early treatment of these lesions could avoid maxillofacial deformity and other complications.
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Affiliation(s)
- J-I Asaumi
- Department of Oral and Maxillofacial Radiology, Field of Tumor Biology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan.
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Iwata Y, Tsuchiya KJ, Mikawa S, Nakamura K, Takai Y, Suda S, Sekine Y, Suzuki K, Kawai M, Sugihara G, Matsuzaki H, Hashimoto K, Tsujii M, Sugiyama T, Takei N, Mori N. Serum levels of P-selectin in men with high-functioning autism. Br J Psychiatry 2008; 193:338-9. [PMID: 18827301 DOI: 10.1192/bjp.bp.107.043497] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [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: 01/14/2023]
Abstract
Immune dysfunction has been proposed as a mechanism for the pathophysiology of autistic-spectrum disorders. The selectin family of adhesion molecules plays a prominent role in immune/inflammatory responses. We determined the serum levels of three types of soluble-form selectin (sP, sL and sE) in 15 men with high-functioning autism and 22 age-matched healthy controls by enzyme-linked immunosorbent assay. Levels of sP-selectin and sL-selectin were significantly lower in patients than in controls. Furthermore, sP-selectin levels were negatively correlated with impaired social development during early childhood.
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Affiliation(s)
- Y Iwata
- Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
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Schmied B, Ulrich A, Matsuzaki H, Batra S, Pour P, Schmied B, Ulrich A, Matsuzaki H, Ding X, Adrian T, Ricordi C, Moyer M. Maintenance of human islets in long term culture. Differentiation 2008. [DOI: 10.1111/j.1432-0436.2000.660403.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yamashita SI, Masuda Y, Yoshida N, Matsuzaki H, Kurizaki T, Haga Y, Ikei S, Miyawaki M, Kawano Y, Chujyo M, Kawahara K. p53AIP1 expression can be a prognostic marker in non-small cell lung cancer. Clin Oncol (R Coll Radiol) 2008; 20:148-51. [PMID: 17851056 DOI: 10.1016/j.clon.2007.08.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2006] [Revised: 05/14/2007] [Accepted: 08/07/2007] [Indexed: 12/15/2022]
Abstract
AIMS p53AIP1 is a potential mediator of p53-dependent apoptosis that is mutated in many kinds of carcinoma. To investigate the role of this gene for non-small cell lung cancer, we compared the relationship between p53AIP1 gene expression and clinicopathological status of lung cancer. MATERIALS AND METHODS Seventy samples from non-small cell lung cancer patients were obtained between 1997 and 2003. For quantitative evaluation of RNA expression by polymerase chain reaction (PCR) we used the Taqman PCR methods. Exons 5-8 of the p53 gene were analysed using PCR-single-stranded conformation polymorphism and sequenced for mutation analysis. RESULTS p53AIP1 gene expression levels in the lymph node metastasis-positive group were significantly lower than in the negative group (positive 35.1+/-83.9; negative 64.2+/-113.4; P=0.0486). The overall survival of the p53AIP1 low expression group was significantly worse than that of the p53AIP1 high expression group (P=0.0206). In the multivariate Cox proportional hazard model, p53AIP1 (P=0.0489) was the independent predictor for overall survival. When we investigated mutation analyses of the p53 gene, we could find several point mutations in 15.7% of all samples. However, there was no relationship between p53AIP1 expression and p53 status. CONCLUSIONS These data suggest that the p53AIP1 gene is important for non-small cell lung cancer progression and may be a possible prognostic marker.
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Affiliation(s)
- S-I Yamashita
- Department of Surgery, National Hospital Organization Kumamoto Medical Center, 1-5 Ninomaru, Kumamoto, 860-0008, Japan.
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Aze T, Fujimura M, Matsumura H, Masumoto K, Nakao N, Matsuzaki H, Nagai H, Kawai M. Measurement of the production rates of 36Cl from Cl, K, and Ca in concrete at the 500 MeV neutron irradiation facility at KENS. J Radioanal Nucl Chem 2007. [DOI: 10.1007/s10967-007-0609-z] [Citation(s) in RCA: 2] [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: 11/28/2022]
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Matsuzaki H, Shima K, Muramatsu T, Ro Y, Hashimoto S, Shibahara T, Shimono M. Osteopontin as biomarker in early invasion by squamous cell carcinoma in tongue. J Oral Pathol Med 2007; 36:30-4. [PMID: 17181739 DOI: 10.1111/j.1600-0714.2006.00493.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 11/29/2022]
Abstract
BACKGROUND Osteopontin (OPN) expression in squamous cell carcinoma (SCC) of the tongue has not been clearly elucidated. METHODS We selected 46 cases of tongue SCC and investigated the expression of OPN by immunohistochemical staining. The immunopositive reaction and score for each case were semiquantitatively evaluated. RESULTS Scores were significantly higher in carcinoma nests than in neighboring normal epithelium or epithelial dysplasia. The OPN was expressed clearly in the cytoplasm of carcinoma cells. In cases of early invasive carcinoma, in particular, expression of OPN showed a remarkable increase at the invasion front compared with the non-invaded regions. However, there was no significant correlation between expression of OPN in the primary tumor nest and lymphatic metastasis, recurrence, or survival rate. CONCLUSION This suggests that OPN is a useful biomarker of early invasion by SCC in tongue.
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Affiliation(s)
- H Matsuzaki
- Department of Pathology, Tokyo Dental College, Chiba, Japan
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Okamoto H, Matsuzaki H, Wakabayashi T, Takahashi Y, Hasegawa T. Photoinduced metallic state mediated by spin-charge separation in a one-dimensional organic Mott insulator. Phys Rev Lett 2007; 98:037401. [PMID: 17358723 DOI: 10.1103/physrevlett.98.037401] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2006] [Indexed: 05/14/2023]
Abstract
Charge dynamics in a one-dimensional (1D) Mott insulator was investigated by fs pump-probe reflection spectroscopy on an organic charge-transfer compound, bis(ethylenedithio)tetrathiafulvalene-difluorotetracyanoquinodimethane (ET-F2TCNQ). The analyses of the transient reflectivity changes demonstrate that low-energy spectral weight induced by photocarrier doping is concentrated on a Drude component being independent of the doping density, and midgap state is never formed. Such phenomena can be explained by the concept of spin-charge separation characteristic of 1D correlated electron systems.
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Affiliation(s)
- H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, 277-8561, Japan
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Matsuzaki H, Katsumata S, Uehara M, Miwa M, Suzuki K. Onset of nephrocalcinosis depends on dietary phosphorus concentration in male rats fed a magnesium-deficient diet. Magnes Res 2006; 19:255-60. [PMID: 17402293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Although a magnesium (Mg)-deficient diet is generally known to induce nephrocalcinosis, our previous study observed that despite the administration of a Mg-deficient diet, the kidney calcium (Ca) and phosphorus (P) concentrations were not increased in male rats. We speculated that this result was due to the P concentration of the experimental diet based on the AIN-93G formula used in the previous study. In the present study, male rats were fed modified AIN-93G diets containing the two different Mg concentrations [0.5 g per kg diet (normal-Mg) or Mg-free (Mg-deficient)] and three different P concentrations [3 (3-P), 5 (5-P) or 7 (7-P) g per kg diet]. By histological examination of the kidney, nephrocalcinosis was not observed in rats fed on the Mg-deficient diet containing 3-P While nephrocalcinosis appeared in rats fed on the Mg-deficient diet containing 5-P and 7-P The degree of nephrocalcinosis was severe in rats fed on the Mg-deficient diet containing 7-P compared with rats fed on the Mg-deficient diet containing 5-P These results demonstrated that the Mg-deficient diet based on AIN-93G formula dose not induce nephrocalcinosis and that the Mg-deficient diet based on AIN-93G formula with increased dietary P concentrations induces nephrocalcinosis in male rats. We suggest that the onset of nephrocalcinosis could depend on the dietary P concentration in male rats fed on a Mg-deficient diet.
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Affiliation(s)
- H Matsuzaki
- Department of Nutrition, Junior College of Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan.
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Abstract
The present study is aimed to clarify the postoperative outcome of endoscopic carpal tunnel release in elderly patients with carpal tunnel syndrome. Endoscopic carpal tunnel release was performed on 37 hands of 27 patients (2 men, 25 women) who were aged 70 years or older and clinically and electrophysiologically diagnosed with carpal tunnel syndrome. Mean age at the time of surgery was 74.5 years (range: 70-85 years). Mean postoperative follow-up was 35.5 months (range: 12-114 months). Pain was present preoperatively in 20 hands, but quickly resolved postoperatively in all cases. Numbness completely disappeared in 13 of 37 hands (35.1%), but some degree of numbness remained in the remaining cases. Preoperative severity of thenar muscle atrophy was none in 4 hands, mild in 7 hands, moderate in 12 hands and severe in 14 hands. Postoperative severity of thenar muscle atrophy at final follow-up was none in 13 hands, mild in 16 hands, moderate in 2 hands and severe in 6 hands, confirming that thenar muscle atrophy improves even in elderly patients. However, moderate or severe thenar muscle atrophy remained in 8 hands (21.6%). Endoscopic carpal tunnel release should be considered in the elderly, even though clinical symptoms may not improve substantially in advanced cases.
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Affiliation(s)
- M Nagaoka
- Orthopaedic Department, Surugadai Nihon University Hospital, Tokyo, Japan.
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Ida T, Matsuzaki H, Morita E, Sakashita H, Harada T, Ogata H, Kimura Y, Miki M, Kitano M, Izumi M. Pulsed Field Waveforms for Magnetization of HTS Gd-Ba-Cu-O Bulk Magnets. ACTA ACUST UNITED AC 2006. [DOI: 10.1088/1742-6596/43/1/133] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ohashi S, Sakashita G, Ban R, Nagasawa M, Matsuzaki H, Murata Y, Taniguchi H, Shima H, Furukawa K, Urano T. Phospho-regulation of human protein kinase Aurora-A: analysis using anti-phospho-Thr288 monoclonal antibodies. Oncogene 2006; 25:7691-702. [PMID: 16785988 DOI: 10.1038/sj.onc.1209754] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.1] [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: 12/19/2022]
Abstract
Mammalian Aurora-A is related to a serine/threonine protein kinase that was originally identified by its close homology with Saccharomyces cerevisiae Ipl1p and Drosophila melanogaster aurora that are key regulators in the orchestration of mitotic events. The protein level of Aurora-A, its peak kinase activity during mitosis, and its activation have been attributed to phosphorylation. Here we show that this enzyme is an arginine-directed kinase and define its substrate specificity. We also found that Thr288 within the activation loop is a critical residue for activating phosphorylation events in vitro and that it is spatiotemporally restricted to a brief window at mitosis on duplicated centrosomes and on spindle microtubules proximal to the poles in vivo. Immunodepletion assays indicated that an upstream kinase(s) of Aurora-A might exist in mammalian cells in addition to autophosphorylation. Furthermore, human activated Aurora-A forms complexes with the negative regulator protein serine/threonine phosphatase type 1 (PP1) that was negatively phosphorylated on Thr320. Interestingly, phospho-specific Aurora-A monoclonal antibodies restrain Aurora-A kinase activity in vitro, providing further therapeutic avenues to explore.
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Affiliation(s)
- S Ohashi
- Department of Biochemistry II, Nagoya University Graduate School of Medicine, Showa-ku, Nagoya, Japan
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Nemoto T, Matsuzaki H, Uehara M, Suzuki K. Magnesium-deficient diet-induced reduction in protein utilization in rats is reversed by dietary magnesium supplementation. Magnes Res 2006; 19:19-27. [PMID: 16846097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
We investigated the effect of dietary magnesium (Mg) level on protein utilization in rats. Male Wistar rats were fed a control diet (control group) and a Mg-deficient diet (Mg-deficient group) for 28 days. After 28 days, the diet of half of the Mg-deficient group (recovery group) was changed from the Mg-deficient diet to the control diet for either 7 or 14 days. After 28 days, final body weight, weight gain and food efficiency were significantly decreased due to the Mg-deficient diet. Apparent Mg absorption, Mg retention and serum Mg levels were also significantly decreased due to the Mg-deficient diet. Furthermore, the Mg-deficient group showed a significant increase in urinary nitrogen (N) excretion and significant decreases in N retention and serum albumin level. At day 7 and 14 after changing the Mg-deficient diet to the control diet, apparent Mg absorption, Mg retention and serum Mg levels were significantly increased in the recovery group as compared with those in the Mg-deficient group. However, with regard to final body weight, weight gain and food efficiency, no significant differences were observed between the Mg-deficient group and the recovery group. At day 14 after changing the diet, urinary N excretion was significantly decreased and N retention was significantly increased in the recovery group as compared with the Mg-deficient group. At day 7 and 14 after changing the diet, the serum albumin level was also significantly increased in the recovery group as compared with that in the Mg-deficient group. These results suggest that: 1) the Mg-deficient diet depresses protein utilization; 2) the Mg-deficient diet-induced impairment of protein utilization is reversed by dietary Mg supplementation; and 3) the Mg-deficient diet-induced growth retardation is not completely reversed after 14 days of Mg supplementation.
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Affiliation(s)
- T Nemoto
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo 156-8502, Japan
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Katsumata SI, Matsuzaki H, Tsuboi R, Uehara M, Suzuki K. Moderate magnesium-restricted diet affects bone formation and bone resorption in rats. Magnes Res 2006; 19:12-8. [PMID: 16846096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This study investigated the effects of moderate magnesium (Mg)-restricted diet on bone formation and bone resorption in rats. Weanling Wistar strain rats were randomly divided into three dietary groups of 6 rats each and fed their respective diets; a control diet containing 0.05% Mg (C), a half Mg diet containing 0.025% Mg (1/2Mg), or a one-fifth Mg diet containing 0.01% Mg (1/5Mg), for 21 days. Serum osteocalcin level was significantly reduced with decreasing dietary Mg level. Urinary excretion of C-terminal telopeptide of type 1 collagen was significantly higher in the 1/5Mg group than in the C group. Serum insulin-like growth factor-1 (IGF-1) level was significantly lower in the 1/2Mg and 1/5Mg groups than in the C group. Serum soluble receptor activator of nuclear factor-kappaB ligand (sRANKL) level was significantly higher in the 1/2Mg and 1/5Mg groups than in the C group. These results showed that a moderate Mg-restricted diet induced a decrease in bone formation and an increase in bone resorption. Furthermore, these changes of bone formation and bone resorption might be caused by serum IGF-1 and sRANKL levels, respectively.
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Affiliation(s)
- S I Katsumata
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, Tokyo, Japan
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Okamoto H, Ikegami K, Wakabayashi T, Ishige Y, Togo J, Kishida H, Matsuzaki H. Ultrafast photoinduced melting of a spin-Peierls phase in an organic charge-transfer compound, K-tetracyanoquinodimethane. Phys Rev Lett 2006; 96:037405. [PMID: 16486769 DOI: 10.1103/physrevlett.96.037405] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2005] [Indexed: 05/06/2023]
Abstract
Ultrafast photoinduced phase transition in a spin-Peierls (SP) system of K-tetracyanoquinodimethane (K-TCNQ) was studied by femtosecond (fs) reflection spectroscopy. Photocarriers destabilize the SP phase, resulting in a decrease in molecular dimerization within 400 fs. Such a melting of the SP phase drives three kinds of coherent oscillations. By comparing the oscillations with the Raman bands activated by the dimerization, we show that the oscillation of 20 cm-1 is due to an LO phonon, and it plays an important role for the stabilization of the SP phase.
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Affiliation(s)
- H Okamoto
- Department of Advanced Materials Science, University of Tokyo, Chiba 277-8561, Japan
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Katsumata SI, Matsuzaki H, Uehara M, Suzuki K. Effect of dietary magnesium supplementation on bone loss in rats fed a high phosphorus diet. Magnes Res 2005; 18:91-6. [PMID: 16100846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The purpose of this study was to investigate the effect of dietary magnesium (Mg) supplementation on bone loss in rats fed a high phosphorus (P) diet. Weanling Wistar strain rats were randomly divided into four dietary groups of 6 rats each and fed their respective diets; a diet containing 0.3% P and 0.05% Mg (C), a diet containing 1.5% P and 0.05% Mg (HP), a diet containing 0.3% P and 0.15% Mg (HMg), or a diet containing 1.5% P and 0.15% Mg (HPMg), for 21 days. Compared to the C and HMg groups, serum parathyroid hormone (PTH) concentration was significantly higher in the HP and HPMg groups. Serum osteocalcin concentration and urinary excretion of C-terminal telopeptides of type I collagen (CTx), markers of bone turnover, were significantly higher in the HP and HPMg groups than in the C and HMg groups. Dietary Mg supplementation had no significant effects on serum PTH and osteocalcin concentrations, while urinary excretion of CTx was significantly lower in the HPMg group than in the HP group. These results suggested that dietary Mg supplementation suppressed bone resorption due to high P diet.
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Affiliation(s)
- S I Katsumata
- Department of Nutritional Science, Faculty of Applied Bioscience, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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Matsuzaki H, Katsumata SI, Uehara M, Suzuki K, Nakamura K. Effects of high calcium intake on bone metabolism in magnesium-deficient rats. Magnes Res 2005; 18:97-102. [PMID: 16100847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
We examined the effects of high calcium (Ca) intake on bone metabolism in magnesium (Mg)-deficient rats. Male Wistar rats were divided into three groups, with each group having a similar mean body weight, and fed a control diet (control group), a Mg-deficient diet (Mg-deficient group) or a Mg-deficient Ca-supplemented diet (Mg-deficient Ca-supplemented group) for 14 d. Femoral Ca content was significantly lower in the Mg-deficient Ca-supplemented group than in the control group and Mg-deficient group. Femoral Mg content was significantly lower in the Mg-deficient group and Mg-deficient Ca-supplemented group than in the control group. Furthermore, femoral Mg content was significantly lower in the Mg-deficient Ca-supplemented group than in the Mg-deficient group. Serum osteocalcin levels (a biochemical marker of bone formation) were significantly lower in the two Mg-deficient groups than in the control group. As a biochemical marker of bone resorption, urinary deoxypyridinoline excretion was significantly higher in the Mg-deficient Ca-supplemented group than in the control group and Mg-deficient group. The results in the present study suggest that high Ca intake had no preventive effect on alteration of bone metabolism in Mg-deficient rats.
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Affiliation(s)
- H Matsuzaki
- Department of Nutrition, Junior College of Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, Tokyo 156-8502, Japan
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Okochi M, Matsuzaki H, Nomura T, Ishii N, Yohda M. Molecular characterization of the group II chaperonin from the hyperthermophilic archaeum Pyrococcus horikoshii OT3. Extremophiles 2004; 9:127-34. [PMID: 15538645 DOI: 10.1007/s00792-004-0427-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2004] [Accepted: 10/12/2004] [Indexed: 11/24/2022]
Abstract
The group II chaperonin from the hyperthermophilic archaeum Pyrococcus horikoshii OT3 (PhCPN) and its functional cooperation with the cognate prefoldin were investigated. PhCPN existed as a homo-oligomer in a double-ring structure, which protected the citrate synthase of a porcine heart from thermal aggregation at 45 degrees C, and did the same on the isopropylmalate dehydrogenase (IPMDH) of a thermophilic bacterium, Thermus thermophilus HB8, at 90 degrees C. PhCPN also enhanced the refolding of green fluorescent protein (GFP), which had been unfolded by low pH, in an ATP-dependent manner. Unexpectedly, functional cooperation between PhCPN and Pyrococcus prefoldin (PhPFD) in the refolding of GFP was not observed. Instead, cooperation between PhCPN and PhPFD was observed in the refolding of IPMDH unfolded with guanidine hydrochloride. Although PhCPN alone was not effective in the refolding of IPMDH, the refolding efficiency was enhanced by the cooperation of PhCPN with PhPFD.
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Affiliation(s)
- Mina Okochi
- Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
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Asaumi JI, Shibata Y, Yanagi Y, Hisatomi M, Matsuzaki H, Konouchi H, Kishi K. Radiographic examination of mesiodens and their associated complications. Dentomaxillofac Radiol 2004; 33:125-7. [PMID: 15314006 DOI: 10.1259/dmfr/68039278] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [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: 11/05/2022] Open
Abstract
OBJECTIVES To examine mesiodens with regard to their status, their influence on adjacent teeth and their alteration during the follow-up period. METHODS From retrospective reviews of all patients who visited our institution from 1990-2001, we identified 200 patients (256 mesiodentes) who were shown to have mesiodentes on the basis of a periapical radiograph, a panoramic radiograph or an axial radiograph. RESULTS The number of supernumerary teeth was one in 146 cases (73%), two in 52 cases (26%) and three in 2 cases (1%). Of 256 mesiodentes, the direction of the crown of the mesiodens was inverted in 172 (67%), in a normal direction in 69 (27%) and in a horizontal direction with regard to the tooth axis in 15 (6%). Of the 147 mesiodentes for which axial radiography was performed, 131 (89%) were located at a palatal site against the dental arch, 16 (11%) overlapped the dental arch and none were at a labial site. Of our 200 cases, a delay of eruption of the permanent central incisor was seen in 12 (6%), malposition or rotation of the central incisor in 5 (2.5%) and dentigerous cyst formation arising from mesiodens in 22 (11%). Marked movement of the mesiodens was seen in 10 cases during the follow-up period of 5-7 years. Some complication arising from mesiodens was seen in 19.5% of all cases in our research. CONCLUSION Although mesiodentes are not caused by malocclusion, they may cause it. A long period of impaction of mesiodentes may bring about dentigerous cyst formation or movement of the mesiodentes.
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Affiliation(s)
- J I Asaumi
- Department of Oral and Maxillofacial Radiology, Field of Tumor Biology, Graduate School of Medicine and Dentistry, Okayama University, Japan.
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