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21.
  • Kim, Hyeong Seok, et al. (author)
  • Development, validation, and comparison of a nomogram based on radiologic findings for predicting malignancy in intraductal papillary mucinous neoplasms of the pancreas : An international multicenter study
  • 2021
  • In: Journal of hepato-biliary-pancreatic sciences. - : Wiley-Blackwell. - 1868-6974 .- 1868-6982.
  • Journal article (peer-reviewed)abstract
    • BACKGROUND: Although we previously proposed a nomogram to predict malignancy in intraductal papillary mucinous neoplasms (IPMN) and validated it in an external cohort, its application is challenging without data on tumor markers. Moreover, existing nomograms have not been compared. This study aimed to develop a nomogram based on radiologic findings and to compare its performance with previously proposed American and Korean/Japanese nomograms.METHODS: We recruited 3708 patients who underwent surgical resection at 31 tertiary institutions in eight countries, and patients with main pancreatic duct >10 mm were excluded. To construct the nomogram, 2606 patients were randomly allocated 1:1 into training and internal validation sets, and area under the receiver operating characteristics curve (AUC) was calculated using 10-fold cross validation by exhaustive search. This nomogram was then validated and compared to the American and Korean/Japanese nomograms using 1102 patients.RESULTS: Among the 2606 patients, 90 had main-duct type, 900 had branch-duct type, and 1616 had mixed-type IPMN. Pathologic results revealed 1628 low-grade dysplasia, 476 high-grade dysplasia, and 502 invasive carcinoma. Location, cyst size, duct dilatation, and mural nodule were selected to construct the nomogram. AUC of this nomogram was higher than the American nomogram (0.691 vs 0.664, P = .014) and comparable with the Korean/Japanese nomogram (0.659 vs 0.653, P = .255).CONCLUSIONS: A novel nomogram based on radiologic findings of IPMN is competitive for predicting risk of malignancy. This nomogram would be clinically helpful in circumstances where tumor markers are not available. The nomogram is freely available at http://statgen.snu.ac.kr/software/nomogramIPMN.
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22.
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23.
  • Otani, Hiroki, et al. (author)
  • Morphometric study on the characteristic external features of normal and abnormal human embryos
  • 2008
  • In: Congenit Anom Kyoto. - : Wiley. ; 48:1, s. 18-28
  • Journal article (peer-reviewed)abstract
    • The embryonic period is characterized by organogenesis and accompanying dynamic changes in external features. The measurement of human embryos has been limited to whole body dimensions, such as crown-rump length. More detailed measurements would add quantitative information about these characteristic events and provide a better understanding of normal and abnormal embryonic development. In the present study, we defined axes, landmarks, and measurements for human embryos, and measured 250 externally normal human embryos at Carnegie stages 14-23 (6.5-29.3 mm in crown-rump length, approximately 5-8 weeks of estimated ovulation age) that were fixed in Bouin's solution and preserved in 10% formalin solution. The axes, landmarks, and measurements defined for human embryos are corresponding to those in human and primate fetuses. The whole body, head, face, and extremities were measured using a scale attached to a dissecting microscope. Axial length, head height plus ear-shoulder length plus trunk height, was designated as a new measurement of the whole body, which is comparable with crown-rump length. Approximate standards of these measurements were obtained. The ratios of some measurements to trunk height and between the different parts were also obtained, and several different developmental patterns were recognized. The reproducibility of each measurement was evaluated by measuring 50 specimens three times each at intervals of one or two months. As a pilot study for the application of the proposed measurements, 84 human embryos with external anomalies, including holoprosencephaly, anomalies of extremities, and pharyngeal arch anomalies, were measured using the same method, and a few tendencies characteristic to holoprosencephaly were noticed.
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24.
  • Ravasi, Timothy, et al. (author)
  • An Atlas of Combinatorial Transcriptional Regulation in Mouse and Man
  • 2010
  • In: CELL. - : Elsevier BV. - 0092-8674 .- 1097-4172. ; 140:5, s. 744-752
  • Journal article (peer-reviewed)abstract
    • Combinatorial interactions among transcription factors are critical to directing tissue-specific gene expression. To build a global atlas of these combinations, we have screened for physical interactions among the majority of human and mouse DNA-binding transcription factors (TFs). The complete networks contain 762 human and 877 mouse interactions. Analysis of the networks reveals that highly connected TFs are broadly expressed across tissues, and that roughly half of the measured interactions are conserved between mouse and human. The data highlight the importance of TF combinations for determining cell fate, and they lead to the identification of a SMAD3/FLI1 complex expressed during development of immunity. The availability of large TF combinatorial networks in both human and mouse will provide many opportunities to study gene regulation, tissue differentiation, and mammalian evolution.
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25.
  • Schijven, Dick, et al. (author)
  • Large-scale analysis of structural brain asymmetries in schizophrenia via the ENIGMA consortium
  • 2023
  • In: Proceedings of the National Academy of Sciences of the United States of America. - : Proceedings of the National Academy of Sciences (PNAS). - 0027-8424 .- 1091-6490. ; 120:14
  • Journal article (peer-reviewed)abstract
    • Left-right asymmetry is an important organizing feature of the healthy brain that may be altered in schizophrenia, but most studies have used relatively small samples and heterogeneous approaches, resulting in equivocal findings. We carried out the largest case-control study of structural brain asymmetries in schizophrenia, with MRI data from 5,080 affected individuals and 6,015 controls across 46 datasets, using a single image analysis protocol. Asymmetry indexes were calculated for global and regional cortical thickness, surface area, and subcortical volume measures. Differences of asymmetry were calculated between affected individuals and controls per dataset, and effect sizes were meta-analyzed across datasets. Small average case-control differences were observed for thickness asymmetries of the rostral anterior cingulate and the middle temporal gyrus, both driven by thinner left-hemispheric cortices in schizophrenia. Analyses of these asymmetries with respect to the use of antipsychotic medication and other clinical variables did not show any significant associations. Assessment of age- and sex-specific effects revealed a stronger average leftward asymmetry of pallidum volume between older cases and controls. Case-control differences in a multivariate context were assessed in a subset of the data (N = 2,029), which revealed that 7% of the variance across all structural asymmetries was explained by case-control status. Subtle case-control differences of brain macrostructural asymmetry may reflect differences at the molecular, cytoarchitectonic, or circuit levels that have functional relevance for the disorder. Reduced left middle temporal cortical thickness is consistent with altered left-hemisphere language network organization in schizophrenia.
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26.
  • Xu, Ke-Jun, et al. (author)
  • Anomalous normal-state gap in an electron-doped cuprate
  • 2024
  • In: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 385:6710, s. 796-800
  • Journal article (peer-reviewed)abstract
    • In the underdoped n-type cuprate Nd2-xCexCuO4, long-range antiferromagnetic order reconstructs the Fermi surface, resulting in a putative antiferromagnetic metal with small Fermi pockets. Using angle-resolved photoemission spectroscopy, we observe an anomalous energy gap, an order of magnitude smaller than the antiferromagnetic gap, in a wide portion of the underdoped regime and smoothly connecting to the superconducting gap at optimal doping. After considering all the known ordering tendencies in tandem with the phase diagram, we hypothesize that the normal-state gap in the underdoped n-type cuprates originates from Cooper pairing. The high temperature scale of the normal-state gap raises the prospect of engineering higher transition temperatures in the n-type cuprates comparable to those of the p-type cuprates.
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27.
  • Xu, Ke Jun, et al. (author)
  • Bogoliubov quasiparticle on the gossamer Fermi surface in electron-doped cuprates
  • 2023
  • In: Nature Physics. - : Springer Nature. - 1745-2473 .- 1745-2481. ; 19:12, s. 1834-1840
  • Journal article (peer-reviewed)abstract
    • Electron-doped cuprates consistently exhibit strong antiferromagnetic correlations, leading to the prevalent belief that antiferromagnetic spin fluctuations mediate Cooper pairing in these unconventional superconductors. However, early investigations showed that although antiferromagnetic spin fluctuations create the largest pseudogap at hot spots in momentum space, the superconducting gap is also maximized at these locations. This presented a paradox for spin-fluctuation-mediated pairing: Cooper pairing is strongest at momenta where the normal-state low-energy spectral weight is most suppressed. Here we investigate this paradox and find evidence that a gossamer—meaning very faint—Fermi surface can provide an explanation for these observations. We study Nd2–xCexCuO4 using angle-resolved photoemission spectroscopy and directly observe the Bogoliubov quasiparticles. First, we resolve the previously observed reconstructed main band and the states gapped by the antiferromagnetic pseudogap around the hot spots. Within the antiferromagnetic pseudogap, we also observe gossamer states with distinct dispersion, from which coherence peaks of Bogoliubov quasiparticles emerge below the superconducting critical temperature. Moreover, the direct observation of a Bogoliubov quasiparticle permits an accurate determination of the superconducting gap, yielding a maximum value an order of magnitude smaller than the pseudogap, establishing the distinct nature of these two gaps. We propose that orientation fluctuations in the antiferromagnetic order parameter are responsible for the gossamer states.
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  • Result 21-27 of 27
Type of publication
journal article (26)
research review (1)
Type of content
peer-reviewed (27)
Author/Editor
Janson, Markus (18)
Hashimoto, Jun (18)
Henning, Thomas (18)
Kudo, Tomoyuki (18)
Kuzuhara, Masayuki (18)
Kwon, Jungmi (18)
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Brandt, Timothy D. (18)
Kandori, Ryo (18)
Mcelwain, Michael W. (18)
Morino, Jun-Ichi (18)
Pyo, Tae-Soo (18)
Watanabe, Makoto (18)
Tamura, Motohide (18)
Knapp, Gillian R. (17)
Serabyn, Eugene (17)
Feldt, Markus (17)
Kusakabe, Nobuhiko (17)
Grady, Carol A. (17)
Thalmann, Christian (17)
Abe, Lyu (17)
Brandner, Wolfgang (17)
Goto, Miwa (17)
Guyon, Olivier (17)
Hayano, Yutaka (17)
Hayashi, Masahiko (17)
Ishii, Miki (17)
Iye, Masanori (17)
Matsuo, Taro (17)
Miyama, Shoken (17)
Moro-Martin, Amaya (17)
Nishimura, Tetsuo (17)
Suto, Hiroshi (17)
Suzuki, Ryuji (17)
Takato, Naruhisa (17)
Terada, Hiroshi (17)
Turner, Edwin L. (17)
Yamada, Toru (17)
Takami, Hideki (17)
Usuda, Tomonori (17)
Takami, Michihiro (16)
Hodapp, Klaus W. (16)
Carson, Joseph C. (15)
Hayashi, Saeko S. (15)
Suenaga, Takuya (15)
Mayama, Satoshi (15)
Akiyama, Eiji (14)
Currie, Thayne (13)
Takahashi, Yasuhiro ... (12)
Tomono, Daigo (10)
Fukagawa, Misato (10)
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University
Stockholm University (20)
Karolinska Institutet (5)
University of Gothenburg (2)
Royal Institute of Technology (2)
Linköping University (2)
Umeå University (1)
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Uppsala University (1)
Lund University (1)
Chalmers University of Technology (1)
Swedish University of Agricultural Sciences (1)
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Language
English (27)
Research subject (UKÄ/SCB)
Natural sciences (23)
Medical and Health Sciences (4)

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