著者

Atsuhito Nakao Yuki Nakamura

出版者

Japanese Society of Allergology

雑誌

Allergology International (ISSN:13238930)

巻号頁・発行日

vol.71, no.4, pp.425-431, 2022 (Released:2022-10-08)

参考文献数

54

被引用文献数

8

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Mast cell activation is crucial to the development of allergic disease. New studies have shown that both IgE-dependent and -independent mast cell activation is temporally regulated by the circadian clock, a time-of-day-keeping system that consists of transcriptional-translational feedback loops of several clock genes. For instance, the core clock gene Clock controls the expression of the high-affinity IgE receptor (FcεRI) and interleukin-33 (IL-33) receptor ST2 on mast cells in a time-dependent manner. As a result, the threshold of IgE-dependent or IL-33-dependent mast cell activation differs between daytime and nighttime. This mechanism may underlie the observation that allergic disease shows a marked day-night change in symptom occurrence and severity. Consistent with this novel concept, environmental and lifestyle factors that disturb the normal rhythmicity of the circadian clock, such as irregular eating habits, can lead to the loss of circadian control of mast cell activation. Consequently, the degree of mast cell activation becomes equally strong at all times of day, which might clinically result in worsening allergic symptoms. Therefore, further understanding of the association between mast cell activation and the circadian clock is important to better manage patients with allergic disease in the real world, characterized by a “24/7 society” filled with environmental and lifestyle factors that disturb the circadian clock rhythmicity.

著者

Rintaro Yokoyama Koichi Haraguchi Kazumi Ogane Seiichiro Imataka Yuki Nakamura Noriaki Hanyu Nobuki Matsuura Kazuyoshi Watanabe Takeo Itou

出版者

The Japanese Society for Neuroendovascular Therapy

雑誌

Journal of Neuroendovascular Therapy (ISSN:18824072)

巻号頁・発行日

pp.cr.2023-0050, (Released:2023-09-30)

参考文献数

19

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Objective: We report a case of near-occlusion of the common carotid bifurcation caused by a giant free-floating thrombus (FFT) successfully treated with mechanical thrombectomy using a large dual-layer stent retriever.Case Presentation: A 51-year-old man presented to our hospital with dysarthria, right hemiparalysis, and paresthesia. MRI revealed an acute infarction of the left cortical watershed zone, and MRA revealed decreased signals in the left common carotid bifurcation. Carotid ultrasonography demonstrated a giant FFT in the left common carotid bifurcation. Angiography revealed a giant thrombus extending from the left common carotid artery (CCA) to the internal carotid artery (ICA) and the external carotid artery. As direct aspiration from both a balloon-guided catheter (BGC) and an aspiration catheter (AC) was ineffective, we deployed a large dual-layer stent retriever from the ICA to the CCA with an AC-connected aspiration pump and retrieved it under manual aspiration through the BGC. The giant thrombus was successfully removed, and complete recanalization was achieved without distal embolisms.Conclusion: Although there is no established treatment for giant thrombi in the carotid artery, mechanical thrombectomy using a large dual-layer stent retriever may be an effective treatment option.

著者

Yuki Nakamura Kayo Hibino Toshio Yanagida Yasushi Sako

出版者

一般社団法人 日本生物物理学会

雑誌

Biophysics and Physicobiology (ISSN:21894779)

巻号頁・発行日

vol.13, pp.1-11, 2016 (Released:2016-01-20)

参考文献数

30

被引用文献数

12

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Son of sevenless (SOS) is a guanine nucleotide exchange factor that regulates cell behavior by activating the small GTPase RAS. Recent in vitro studies have suggested that an interaction between SOS and the GTP-bound active form of RAS generates a positive feedback loop that propagates RAS activation. However, it remains unclear how the multiple domains of SOS contribute to the regulation of the feedback loop in living cells. Here, we observed single molecules of SOS in living cells to analyze the kinetics and dynamics of SOS behavior. The results indicate that the histone fold and Grb2-binding domains of SOS concertedly produce an intermediate state of SOS on the cell surface. The fraction of the intermediated state was reduced in positive feedback mutants, suggesting that the feedback loop functions during the intermediate state. Translocation of RAF, recognizing the active form of RAS, to the cell surface was almost abolished in the positive feedback mutants. Thus, the concerted functions of multiple membrane-associating domains of SOS governed the positive feedback loop, which is crucial for cell fate decision regulated by RAS.

著者

Atsuhiko Suenaga Naoki Sawa Katsuyuki Miki Takayoshi Yokoyama Yasuo Ishii Hiroki Mizuno Daisuke Ikuma Yuki Oba Akinari Sekine Masayuki Yamanouchi Eiko Hasegawa Tatsuya Suwabe Kei Kono Keiichi Kinowaki Kenichi Ohashi Kazuho Honda Motoaki Miyazono Yuki Nakamura Yoshifumi Ubara

出版者

The Japanese Society of Internal Medicine

雑誌

Internal Medicine (ISSN:09182918)

巻号頁・発行日

pp.0813-22, (Released:2023-02-01)

参考文献数

16

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We experienced a 36-year-old man with lupus nephritis and antiphospholipid syndrome (APS) who received a donor kidney from his father. Twenty-two months after transplantation, at a time of poor adherence to immunosuppressants and warfarin, the patient developed sudden graft loss due to hemolytic uremic syndrome with rapid deterioration of renal function, thrombocytopenia, and hemolytic anemia. A kidney biopsy showed thrombotic microangiopathy (TMA) related to platelet thrombus formation; however, there was no recurrence of lupus and no findings suggestive of post-transplant rejection, so acute TMA associated with APS was thought to be the cause of the graft loss. This case highlights the importance of instructing patients with lupus nephritis to adhere to treatment with warfarin, a therapeutic drug for APS.

著者

Ryoko Mizushima Yoshio Nakata Keiko Motonaga Akiko Kamei Akira Fujiwara Yuki Nakamura Eri Takai Jun Yasuda Kanae Myoenzono Kazuhiro Shimizu

雑誌

22nd IUNS-International Congress of Nutrition

巻号頁・発行日

2022-11-10

著者

中園 聡 平川 ひろみ 黒木 梨絵 中村 有希 ナカゾノ サトル ヒラカワ ヒロミ クロキ リエ ナカムラ ユキ Satoru Nakazono Hiromi Hirakawa Rie Kuroki Yuki Nakamura

出版者

鹿児島国際大学国際文化学部

雑誌

国際文化学部論集 (ISSN:13459929)

巻号頁・発行日

vol.12, no.4, pp.359-373, 2012-03-20

著者

Yuki Nakamura Kayoko Ishimaru Atsuhito Nakao

出版者

Japanese Society of Allergology

雑誌

Allergology International (ISSN:13238930)

巻号頁・発行日

vol.69, no.2, pp.296-299, 2020 (Released:2020-04-17)

参考文献数

9

被引用文献数

5

著者

Miyuki Shibata Keiichi Itatani Norihiko Oka Takeshi Yoshii Yuki Nakamura Tadashi Kitamura Tetsuya Horai Kagami Miyaji

出版者

一般社団法人 インターナショナル・ハート・ジャーナル刊行会

雑誌

International Heart Journal (ISSN:13492365)

巻号頁・発行日

vol.56, no.5, pp.533-536, 2015 (Released:2015-09-29)

参考文献数

22

被引用文献数

6

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The modified Blalock-Taussig shunt (mBTS) is one of the most important palliative procedures in congenital heart surgery. However, in neonates and small infants, operative mortality and morbidity due to excessive pulmonary blood flow or shunt failure remains high. In this study, a small shunt graft (3.0-mm diameter) was estimated to determine the optimal shunt graft size of BTS as an initial palliation for ultimate biventricular circulation. Eighteen patients weighing an average 3.5 kg who underwent mBTS from July 2004 to January 2013 at our institute were reviewed. We divided the study cohort into two groups: group S (n = 10) included patients with 3.0-mm diameter shunt grafts, and group L (n = 8) included patients with 3.5-mm diameter shunt grafts. There were no hospital deaths or shunt occlusion in either group. One group L patient (12.5%) had cardiogenic shock due to excessive pulmonary blood flow. There were no differences in postoperative arterial oxygen saturation (SaO2) between the groups. There were no differences in body weight at intracardiac repair (ICR) between the groups. During the interstage to ICR, body weight gain was significantly greater in group S than in group L (P = 0.008). The small shunt graft (3.0-mm diameter) in BTS was safe, provided adequate pulmonary blood flow, and led to significant weight gain between mBTS and ICR for ultimate biventricular circulation in neonates and small infants with low body weight.