著者
Naoko Tachibana Michiaki Kinoshita Fuyuki Kametani Keiko Tanaka Yumi Une Yotaro Komatsu Yukihiro Kobayashi Shu-ichi Ikeda
出版者
東北ジャーナル刊行会
雑誌
The Tohoku Journal of Experimental Medicine (ISSN:00408727)
巻号頁・発行日
vol.235, no.3, pp.223-231, 2015 (Released:2015-03-17)
参考文献数
55
被引用文献数
1 2

Autoimmune synaptic encephalitis is characterized by the presence of autoantibodies against synaptic constituent receptors and manifests as neurological and psychiatric disorders. Anti-N-methyl-D-aspartate receptor (NMDAR) encephalitis is such an autoimmune disorder that predominantly affects young women. It is associated with antibodies against the extracellular region of the NR1 subunit of postsynaptic NMDAR. Each NMDAR functions as a heterotetrameric complex that is composed of four subunits, including NR1 and NR2A, NR2B, or NR2C. Importantly, ovarian teratoma is a typical complication of anti-NMDAR encephalitis in female patients and may contain antigenic neural tissue; however, antigenic sites remain unknown in female patients without ovarian teratoma. The purpose of this study was to investigate the expression of NMDARs in the ovum. We detected NR1 and NR2B immunoreactivity in protein fractions extracted from the bovine ovary and ova by SDS-polyacrylamide gel electrophoresis and immunoblotting analysis. Immunoprecipitates digested with trypsin were analyzed by reverse phase liquid chromatography coupled to tandem mass spectrometry. We obtained the following five peptides: SPFGRFK and KNLQDR, which are consistent with partial sequences of human NR1, and GVEDALVSLK, QPTVAGAPK, and NEVMSSK, which correspond to those of NR2A, NR2B and NR2C, respectively. Immunocytochemical analysis revealed that the bovine ovum was stained with the immunoglobulin G purified from the serum of a patient with anti-NMDAR encephalitis. Taken together, we propose that the normal ovum expresses NMDARs that have strong affinity for the disease-specific IgG. The presence of NMDARs in ova may help explain why young females without ovarian teratomas are also affected by anti-NMDAR encephalitis.
著者
Koichiro Miyajima Keiko Tanaka
出版者
FCCA(Forum: Carbohydrates Coming of Age)
雑誌
Trends in Glycoscience and Glycotechnology (ISSN:09157352)
巻号頁・発行日
vol.4, no.19, pp.457-463, 1992-09-02 (Released:2010-01-05)
参考文献数
9
被引用文献数
2 2

リポソームの凍結融解、および凍結乾燥に及ぼす糖の保護機構に関して、内水相マーカーの漏出、ラマンおよびNMR分光、熱分析 (DSC) を用いて研究した。凍結状態ではリポソームの表面は濃厚な糖水溶液またはガラスで覆われ、氷晶からの機械的破壊やリポソームの融合から保護される。単糖、二糖、そして三糖は、単糖ユニットあたり同じような保護作用を示した。乾燥過程では、レシチンの極性基であるリン酸基に水和した水分子は糖分子によって置換され、リポソームは液晶状態を保たれる。液晶状態の脂質膜は再水和過程で強い安定性を示した。二糖と凍結乾燥されたこのリポソームは、リン酸基と適当な分子の大きさを持つ糖分子との水素結合が重要であることを示している。
著者
Yoshihiro Miyake Keiko Tanaka Tetsuo Nishikawa Mitsuhide Naruse Ryoichi Takayanagi Hironobu Sasano Yoshiyu Takeda Hirotaka Shibata Masakatsu Sone Fumitoshi Satoh Masanobu Yamada Hajime Ueshiba Takuyuki Katabami Yasumasa Iwasaki Hirotoshi Tanaka Yusuke Tanahashi Shigeru Suzuki Tomonobu Hasegawa Noriyuki Katsumata Toshihiro Tajima Toshihiko Yanase
出版者
(社)日本内分泌学会
雑誌
Endocrine Journal (ISSN:09188959)
巻号頁・発行日
pp.EJ13-0353, (Released:2013-09-28)
被引用文献数
7 14

The Research Committee of Disorders of Adrenal Hormones, Japan, undertook a nationwide epidemiological study of primary aldosteronism (PA). The present study was undertaken as a part of this study to reveal the relationship between type of treatment and the prognosis of PA. In the primary survey, 4161 patients with PA during the period January 1, 2003-December 31, 2007 were reported from 3252 departments of internal medicine, pediatrics and urology. In the secondary survey, a questionnaire that requested detailed clinical information on individual patients was sent to those departments reporting patients in the primary survey. In total, data on 1706 patients with PA were available in the present study. Among patients with bilateral or unilateral aldosterone-producing adenoma, after adjustment for age at which prognosis was examined, sex, surgical treatment and medical treatment, surgical treatment was significantly associated with amelioration of hypertension (adjusted odds ratio [OR]: 0.47 [95% confidence interval (CI): 0.29–0.77]) and hypokalemia (adjusted OR: 0.17 [95% CI: 0.11–0.29]). No significant relationship was observed between medical treatment and such prognosis in this group of patients. Among patients with bilateral or unilateral adrenal hyperplasia, surgical, but not medical, treatment was significantly associated with amelioration of hypokalemia (adjusted OR: 0.23 [95% CI: 0.06–0.74]), while there was no relationship between surgical or medical treatment and the prognosis of hypertension. In conclusion, surgery offered a better prognosis of PA than medication with regards to hypertension and hypokalemia, with the limitation that a new anti-aldosterone drug, eplerenone, was not available during the study period.
著者
Kentaro MURAKAMI Yoshihiro MIYAKE Satoshi SASAKI Keiko TANAKA Masashi ARAKAWA
出版者
Center for Academic Publications Japan
雑誌
Journal of Nutritional Science and Vitaminology (ISSN:03014800)
巻号頁・発行日
vol.58, no.4, pp.247-252, 2012 (Released:2012-11-07)
参考文献数
33
被引用文献数
8 17

The possible role of eating rate in promoting obesity has long been of interest. We examined the association between rate of eating and overweight status in Japanese children and adolescents. This Japanese cross-sectional study included 15,974 children (6-11 y; 7,956 boys and 8,018 girls) and 8,202 adolescents (12-15 y; 3,944 boys and 4,258 girls). Rate of eating was self-reported according to five categories. Body mass index (BMI) was calculated from self-reported body weight and height. Overweight was defined according to the International Obesity Task Force age- and sex-specific BMI cutoffs. The overall prevalence of overweight was 13.2%. Rate of eating was positively associated with the risk of overweight, independent of protein, fat, and dietary fiber intakes. Multivariate odds ratios (95% confidence intervals) for overweight in the very slow, relatively slow, medium, relatively fast, and very fast categories were 0.31 (0.20, 0.49), 0.49 (0.40, 0.60), 1 (reference), 2.81 (2.42, 3.26), and 4.49 (3.47, 5.81) in male children; 0.42 (0.31, 0.58), 0.49 (0.41, 0.59), 1 (reference), 2.74 (2.27, 3.31), and 5.69 (3.75, 8.63) in female children; 0.13 (0.03, 0.54), 0.43 (0.28, 0.65), 1 (reference), 2.31 (1.88, 2.84), and 3.84 (2.77, 5.31) in male adolescents; and 0.55 (0.30, 1.01), 0.46 (0.33, 0.65), 1 (reference), 1.30 (0.99, 1.71), and 1.49 (0.84, 2.65) in female adolescents, respectively (all p for trend<0.0001). In conclusion, this large cross-sectional study in Japan showed that a higher rate of eating was independently positively associated with an increasing risk of overweight in children and adolescents.