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排序方式: 共有651条查询结果,搜索用时 15 毫秒
641.
Hiroyuki Matsuda Iwao Sato Rieko Asaumi Takuya Omotehara Shinichi Kawata Kenta Nagahori Zhong-Lian Li Masahiro Itoh 《European journal of histochemistry : EJH》2021,65(2)
Thickening of the Schneiderian membrane (SM, mucosa of the maxillary sinus) appears in the paranasal sinus. Information on SM thickening is available for patients receiving sinus lift treatments, which is a risk factor for SM excretory dysfunction. However, more information is needed on the structure of the SM and the relationship between the maxilla sinus and palatine with the alveolar bone and the SM for dental implant treatment in the human maxilla. One hundred twenty-six sides of the maxilla from 71 cadavers were subjected to cone-beam computed tomography analysis and macroscopic and immunohistochemical observations in this study. A thickened SM was mainly observed in the middle region of the basal layer of the maxillary sinus (MS). Strong calcitonin gene-related peptide (CGRP)-positive reactions were observed in the alveolar bone, oral mucosa, mucosa of the MS, and trigeminal ganglion (TG) cells in dentulous samples compared with edentulous samples. TG cells play important roles in delivering CGRP through axons to the mucosal gland and in regulating the maxilla-related thickening of the SM. These data could help determine CGRP functions in the mucosal gland and bone formation between dentulous and edentulous samples and indicate that CGRP may pass from the TG to the MS glands.Key words: Mucosa, maxillary sinus, cone-beam computed tomography, immunohistochemistry, calcitonin gene-related peptide, trigeminal ganglion 相似文献
642.
Xieyi Zhang Takahito Nakajima Kenta Mizoi Yoshito Tsushima Takuo Ogihara 《Journal of biophotonics》2022,15(1):e202100266
Near-infrared photoimmunotherapy (NIR-PIT) induces immediate cell death after irradiation with near-infrared (NIR) light. Acute therapeutic effects caused by NIR-PIT before the change of tumor size is essential to be monitored by imaging modalities. We summarized and compared the imaging modalities for evaluating acute therapeutic effects after NIR-PIT, and aimed to provide a better understanding of advantages and disadvantages of each modality for evaluation in clinical applications. Fluorescence imaging and fluorescence lifetime, with high resolution, remains high accumulation of fluorescence dyes in the normal organs. High resolution and noninvasiveness are the major advantages of magnetic resonance imaging, while 18F-fluorodeoxyglucose positron emission tomography provides information about the glucose metabolism. Optical coherence tomography provided more information about the blood vessels. Thus, all of the imaging modalities play an important role in evaluating acute therapeutic effects after NIR-PIT. Clinicians should choose suitable modality according to specific purpose and conditions in clinical application. 相似文献
643.
The present study examined whether intention to conceal knowledge affects P300 amplitude and detection accuracy in the concealed
information test. Eighteen university students were told to choose one card from five and to hide it. In the conceal condition,
participants made an effort to leave their chosen card undetected by suppressing their brain response to it. In the transmit
condition, they attempted to inform the experimenter of the chosen card by enhancing brain response to it. In the no secret
condition, participants showed the chosen card to the experimenter beforehand and lost their motivation to conceal it. The
difference in P300 amplitude between the chosen and unchosen cards was significant only in the conceal and transmit conditions.
The results suggest that a larger P300 amplitude for the chosen card was not due to a deception-specific process but rather
to increased significance of the item caused by additional processing. 相似文献
644.
645.
Keisuke Ota Yasuhiro Oisi Takayuki Suzuki Muneki Ikeda Yoshiki Ito Tsubasa Ito Hiroyuki Uwamori Kenta Kobayashi Midori Kobayashi Maya Odagawa Chie Matsubara Yoshinori Kuroiwa Masaru Horikoshi Junya Matsushita Hiroyuki Hioki Masamichi Ohkura Junichi Nakai Masafumi Oizumi Masanori Murayama 《Neuron》2021,109(11):1810-1824.e9
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648.
Kenta Kawahara Masashi Nagata Ryoji Yoshida Akiyuki Hirosue Takuya Tanaka Yuichiro Matsuoka Hidetaka Arita Hikaru Nakashima Junki Sakata Keisuke Yamana Sho Kawaguchi Shunsuke Gohara Yuka Nagao Masatoshi Hirayama Nozomu Takahashi Mayumi Hirayama Hideki Nakayama 《Biochemistry and Biophysics Reports》2021
We aimed to determine the functional role of the miRNA, which affects drug sensitivity to 5-FU in oral squamous cell carcinoma (OSCC), using two types of 5-FU-resistant and parental OSCC cell lines. MiRNA microarray data showed that miR-30a was significantly upregulated in two resistant cell lines. Therefore, we investigated the effects and molecular mechanism of miR-30a on 5-FU sensitivity. Stable overexpression of miR-30a in parental OSCC cells decreased cell proliferation and attenuated drug sensitivity to 5-FU. Cell cycle analysis indicated that miR-30a overexpression increased the proportion of G1 phase cells and decreased the proportion of S phase cells. MiR-30a knockdown using siRNA reversed the effects of miR-30a overexpression. DNA microarray analysis using miR-30a-overexpressing cell lines and a TargetScan database search showed that cyclin E2 (CCNE2) is a target of miR-30a. A luciferase reporter assay confirmed that a miR-30a mimic interacted with the specific binding site in the 3' UTR of CCNE2. CCNE2 knockdown with siRNA in OSCC cells yielded decreased drug sensitivity to 5-FU, similar to miR-30a overexpressing cells. These findings suggest that miR-30a in OSCC may be a novel biomarker of 5-FU-resistant tumors, as well as a therapeutic target for combating resistance. 相似文献
649.
The β-coil transition of poly(S-carboxymethyl-L -cysteine) (poly[Cys(CH2CO2H)]) and poly(S-carboxyethyl-L -cysteine) (poly[Cys((CH2)2CO2H)]) was followed by CD, potentiometric titration, and viscosity in the absence of added salt. These different properties give consistent results for poly[Cys((CH2)2CO2H)]. The CD spectra of poly[Cys(CH2CO2H)] change considerably with the degree of neutralization α even for a low-molecular-weight sample incapable of forming the β-structure. Because of the superposition of this additional effect, the dependence of CD on α is inconsistent with titration data for the case of poly[Cys(CH2CO2H)], particularly when the nπ transition is used to follow the β-coil transition. The change of CD inherent to the β-coil transition is characterized by an isodichroic point: 215 nm for poly[Cys((CH2)2CO2H)] and 218 nm for poly[Cys(CH2CO2H)]. A criterion supporting the stacking of the pleated sheet is suggested based on the isodichroic point. 相似文献
650.