著者

Kenju Kobachi Sota Kuno Shinya Sato Kenta Sumiyama Michiyuki Matsuda Kenta Terai

出版者

Japan Society for Cell Biology

雑誌

Cell Structure and Function (ISSN:03867196)

巻号頁・発行日

vol.45, no.2, pp.131-141, 2020 (Released:2020-08-21)

参考文献数

46

被引用文献数

2 13

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Tissue absorbance, light scattering, and autofluorescence are significantly lower in the near-infrared (NIR) range than in the visible range. Because of these advantages, NIR fluorescent proteins (FPs) are in high demand for in vivo imaging. Nevertheless, application of NIR FPs such as iRFP is still limited due to their dimness in mammalian cells. In contrast to GFP and its variants, iRFP requires biliverdin (BV) as a chromophore. The dimness of iRFP is at least partly due to rapid reduction of BV by biliverdin reductase-A (BLVRA). Here, we established biliverdin reductase-a knockout (Blvra–/–) mice to increase the intracellular BV concentration and, thereby, to enhance iRFP fluorescence intensity. As anticipated, iRFP fluorescence intensity was significantly increased in all examined tissues of Blvra–/– mice. Similarly, the genetically encoded calcium indicator NIR-GECO1, which is engineered based on another NIR FP, mIFP, exhibited a marked increase in fluorescence intensity in mouse embryonic fibroblasts derived from Blvra–/– mice. We expanded this approach to an NIR light-sensing optogenetic tool, the BphP1-PpsR2 system, which also requires BV as a chromophore. Again, deletion of the Blvra gene markedly enhanced the light response in HeLa cells. These results indicate that the Blvra–/– mouse is a versatile tool for the in vivo application of NIR FPs and NIR light-sensing optogenetic tools.Key words: in vivo imaging, near-infrared fluorescent protein, biliverdin, biliverdin reductase, optogenetic tool

著者

Kenju Kobachi Sota Kuno Shinya Sato Kenta Sumiyama Michiyuki Matsuda Kenta Terai

出版者

Japan Society for Cell Biology

雑誌

Cell Structure and Function (ISSN:03867196)

巻号頁・発行日

pp.20010, (Released:2020-06-25)

被引用文献数

2 13

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Tissue absorbance, light scattering, and autofluorescence are significantly lower in the near-infrared (NIR) range than in the visible range. Because of these advantages, NIR fluorescent proteins (FPs) are in high demand for in vivo imaging. Nevertheless, application of NIR FPs such as iRFP is still limited due to their dimness in mammalian cells. In contrast to GFP and its variants, iRFP requires biliverdin (BV) as a chromophore. The dimness of iRFP is at least partly due to rapid reduction of BV by biliverdin reductase A (BLVRA). Here, we established biliverdin reductase-a knockout (Blvra-/-) mice to increase the intracellular BV concentration and, thereby, to enhance iRFP fluorescence intensity. As anticipated, iRFP fluorescence intensity was significantly increased in all examined tissues of Blvra-/- mice. Similarly, the genetically encoded calcium indicator NIR-GECO1, which is engineered based on another NIR FP, mIFP, exhibited a marked increase in fluorescence intensity in mouse embryonic fibroblasts derived from Blvra-/- mice. We expanded this approach to an NIR light-sensing optogenetic tool, the BphP1-PpsR2 system, which also requires BV as a chromophore. Again, deletion of the Blvra gene markedly enhanced the light response in HeLa cells. These results indicate that the Blvra-/- mouse is a versatile tool for the in vivo application of NIR FPs and NIR light-sensing optogenetic tools. Key words: in vivo imaging, near-infrared fluorescent protein, biliverdin, biliverdin reductase, optogenetic tool

著者

Shiho Toyama Ayuko Takatani Tomohiro Koga Mizuna Eguchi Momoko Okamoto Sosuke Tsuji Yushiro Endo Toshimasa Shimizu Remi Sumiyoshi Takashi Igawa Shin-ya Kawashiri Naoki Iwamoto Kunihiro Ichinose Mami Tamai Hideki Nakamura Tomoki Origuchi Masako Furuyama Maiko Tabuchi Shinichiro Kobayashi Kengo Kanetaka Mikiko Hashisako Kuniko Abe Daisuke Niino Shinya Sato Yasushi Miyazaki Atsushi Kawakami

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

pp.2782-19, (Released:2019-07-22)

参考文献数

20

被引用文献数

1

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A 71-year-old woman being treated with methotrexate (MTX) and tacrolimus (TAC) for rheumatoid arthritis (RA) was admitted to our hospital and underwent surgery for gastric perforation and peritonitis. An endoscopic examination six days post-surgery showed an extensive ulcer in the stomach, and a biopsy revealed diffused large B-cell lymphoma. We diagnosed her with immunodeficiency-associated lymphoproliferative disorder (LPD) and discontinued the MTX and TAC. She underwent gastrectomy due to stenosis approximately two months after the first operation, but the histopathological findings of lymphoma had disappeared. LPD should be considered as a potential cause of gastric perforation during RA treatment.

著者

Kei Moriya Keigo Saeki Norihisa Nishimura Shinya Sato Yasuhiko Sawada Hiroaki Takaya Kosuke Kaji Hideto Kawaratani Tadashi Namisaki Takemi Akahane Hitoshi Yoshiji

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

pp.1817-23, (Released:2023-05-17)

参考文献数

50

被引用文献数

2

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Background and Aims Patients with autoimmune hepatitis (AIH) reportedly have an impaired quality of life (QOL), mainly due to depression, even during remission. In addition, hypozincaemia has been demonstrated in patients with chronic liver disease, including AIH, and is known to be related to depression. Corticosteroids are known to cause mental instability. We therefore investigated the longitudinal association between zinc supplementation and changes in the mental status among AIH patients treated with corticosteroids. Patients and Methods This study enrolled 26 patients with serological remission of AIH routinely treated at our facility after excluding 15 patients who either discontinued polaprezinc (150 mg/day) within 24 months or interrupted treatment. Two questionnaires, the Chronic Liver Disease Questionnaire (CLDQ) and SF-36, were adopted to evaluate the QOL before and after zinc supplementation. Results Serum zinc levels were significantly elevated after zinc supplementation (P <0.0001). The CLDQ worry subscale significantly improved after zinc supplementation (P = 0.017), but none of the SF-36 subscales was affected. Multivariate analyses demonstrated that daily prednisolone dosing was inversely related to both the CLDQ worry domain score (P = 0.036) and the SF-36 mental health component (P = 0.031). There was a significant negative correlation between the changes in the daily steroid dose and the CLDQ worry domain scores before and after zinc supplementation (P = 0.006). No serious adverse events occurred during the observation period. Conclusions Zinc supplementation safely and efficiently improved mental impairment, possibly caused by continuous treatment with corticosteroids, in patients with AIH.

著者

Miki Hashimoto Hidehiro Itonaga Yasuhito Nannya Hirokazu Taniguchi Yuichi Fukuda Takafumi Furumoto Machiko Fujioka Sachie Kasai Masataka Taguchi Hiroaki Taniguchi Shinya Sato Yasushi Sawayama Sunao Atogami Keisuke Iwasaki Tomoko Hata Hiroshi Soda Yukiyoshi Moriuchi Koh Nakata Seishi Ogawa Yasushi Miyazaki

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

vol.59, no.8, pp.1081-1086, 2020-04-15 (Released:2020-04-15)

参考文献数

31

被引用文献数

2 4

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Secondary pulmonary alveolar proteinosis (sPAP) is a complication of myelodysplastic syndrome (MDS). A 60-year-old woman was diagnosed with MDS with excess blasts-1. Fifty-four months after the initial diagnosis, treatment with azacitidine was initiated. Seventy-three months after the diagnosis, a bone marrow examination revealed increased myeloblasts, at which time computed tomography showed diffuse ground-glass opacities and interlobular septal thickening in the bilateral lower lung fields. A lung biopsy revealed the presence of PAP; therefore, the clinical diagnosis of MDS/sPAP was confirmed. Careful attention should be paid to the development of sPAP in MDS patients with pulmonary lesions during azacitidine treatment.

著者

Yangwen Dong Shinya Sato Vinod Kumar Kyoji Hoshino

出版者

ISCM Forum

雑誌

Innovation and Supply Chain Management (ISSN:21870969)

巻号頁・発行日

vol.10, no.1, pp.43-52, 2016-03-31 (Released:2016-12-21)

参考文献数

20

被引用文献数

3

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Major studies on cell production have put the emphasis on technical factors (machine order/layout, family part grouping, workŽow sequence, etc.), it is still insufficient to investigate how workers' aptitude affect the productivity of production cells. As the first attempt to examine the workers' aptitude toward the assembly tasks in production cells,we make a comparatively detailed literature review on the major theories and assessment measures developed in the field of industrial and organizational psychology. Then we give the definition of four aptitudes and related hypotheses from the aspects of workers' cognition and interest, finger dexterity, affection, and behavioral intention. We design a self-evaluation sheet to measure the workers' aptitudes, and moreover design a cell production experiment to investigate the relation between the workers' aptitudes and productivity of production cells. Through our experimental study, we verified statistically that the workers' cognition and interest, negative affection correlate significantly to the productivity of production cells. However, there are still some issues to be addressed further in order to measure the workers' aptitudes through the self-evaluation sheet.

著者

Takaaki HOSOYA Jun HATAZAWA Shinya SATO Masafumi KANOTO Akira FUKAO Takamasa KAYAMA

出版者

社団法人 日本脳神経外科学会

雑誌

Neurologia medico-chirurgica (ISSN:04708105)

巻号頁・発行日

vol.53, no.4, pp.207-212, 2013 (Released:2013-04-25)

参考文献数

23

被引用文献数

1 13

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We would like to propose floating dural sac sign, which is observed as a hyperintense band or rim around the spinal dural sac on axial T2-weighted images, as a sensitive sign to identify cerebrospinal fluid (CSF) leakage. One hundred patients with orthostatic headache were prospectively registered in 11 hospitals. These patients were examined by brain magnetic resonance (MR) imaging (n = 89), radioisotope cisternography (n = 89), MR myelography (n = 86), axial T2-weighted imaging of the spine (n = 70), and computed tomography myelography (n = 2). In this study, we separately evaluated the imaging findings of intracranial hypotension and spinal CSF leakage. Among 100 patients, 16 patients were diagnosed as having spinal CSF leaks. Of 70 patients examined with axial T2-weighted imaging, 14 patients were diagnosed with spinal CSF leaks, and floating dural sac sign was observed in 17 patients, 13 patients with spinal CSF leaks and 4 without CSF leaks (sensitivity 92.9%, specificity 92.9%). Of 86 patients examined by MR myelography, extradural fluid was observed in only 3 patients (sensitivity 21.4%, specificity 100%). The floating dural sac sign was a sensitive sign that can be used to identify CSF leakage. Spinal axial T2-weighted imaging might be a good screening method for spinal CSF leakage that can help to avoid the need for lumbar puncture.