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( Kumi Nakaya ),( Yohko Nagura ),( Ryoko Hasegawa ),( Hitomi Ito ),( Shin Fukudo ) 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2016 Journal of Neurogastroenterology and Motility (JNM Vol.22 No.4
Background/Aims Dai-kenchu-to (DKT), a traditional Japanese herbal medicine, is known to increase gastrointestinal motility and improve ileal function. We tested our hypotheses that (1) pretreatment with DKT would block the colorectal distention-induced visceromotor response in rats, and (2) pretreatment with DKT would attenuate colorectal distention-induced adrenocorticotropic hormone (ACTH) release and anxiety-related behavior. Methods Rats were pretreated with vehicle or DKT (300 mg/kg/5 mL, per os). Visceromotor responses were analyzed using electromyography in response to colorectal distention (10, 20, 40, 60, and 80 mmHg for 20 seconds at 3-minutes intervals). Anxiety-related behavior was measured during exposure to an elevated-plus maze after colorectal distention. Plasma ACTH and serum corticosterone levels were measured after exposure to the elevated-plus maze. Results Colorectal distention produced robust contractions of the abdominal musculature, graded according to stimulus intensity, in vehicletreated rats. At 40, 60, and 80 mmHg of colorectal distention, the visceromotor responses of DKT-treated rats was significantly lower than that of vehicle-treated rats. At 80 mmHg, the amplitude was suppressed to approximately one-third in DKT-treated rats, compared with that in vehicle-treated rats. Smooth muscle compliance and the velocity of accommodation to 60 mmHg of stretching did not significantly differ between the vehicle-treated and DKT-treated rats. Similarly, the DKT did not influence colorectal distentioninduced ACTH release, corticosterone levels, or anxiety-related behavior in rats. Conclusions Our results suggest that DKT attenuates the colorectal distention-induced visceromotor responses, without increasing smooth muscle compliance, ACTH release or anxiety-related behavior in rats.
Higashihara Tomoya,Inoue Kyoichi,Nagura Masato,Hirao Akira The Polymer Society of Korea 2006 Macromolecular Research Vol.14 No.3
To successively synthesize star-branched polymers, we developed a new iterative methodology which involves only two sets of the reactions in each iterative process: (a) an addition reaction of DPE or DPE-functionalized polymer to a living anionic polymer, and (b) an in-situ reaction of 1-(4-(4-bromobutyl)phenyl)-1-phenylethylene with the generated 1,1-diphenylalkyl anion to introduce one DPE functionality. With this methodology, 3-, 4-, and 5-arm, regular star-branched polystyrenes, as well as 3-arm ABC, 4-arm ABCD, and a new 5-arm ABCDE, asymmetric star-branched polymers, were successively synthesized. The A, B, C, D, and E arm segments were poly(4-trimethylsilylstyrene), poly(4-methoxystyrene), poly(4-methylstyrene), polystyrene, and poly(4-tert-butyldimethylsilyloxystyrene), respectively. All of the resulting star-branched polymers were well-defined in architecture and precisely controlled in chain length, as confirmed by SEC, $^1H$ NMR, VPO, and SLS analyses. Furthermore, we extended the iterative methodology by the use of a new functionalized DPE derivative, 1-(3-chloromethylphenyl)-1-((3-(1-phonyletheny1)phenyl) ethylene, capable of introducing two DPE functionalities via one DPE anion reaction site in the reaction (b). The number of arm segments of the star-branched polymer synthesized by the methodology could be dramatically increased to 2, 6, and up to 14 by repeating the iterative process.
Association between periodontal bacteria and degenerative aortic stenosis: a pilot study
Kataoka, Akihisa,Katagiri, Sayaka,Kawashima, Hideyuki,Nagura, Fukuko,Nara, Yugo,Hioki, Hirofumi,Nakashima, Makoto,Sasaki, Naoki,Hatasa, Masahiro,Maekawa, Shogo,Ohsugi, Yujin,Shiba, Takahiko,Watanabe, Korean Academy of Periodontology 2021 Journal of Periodontal & Implant Science Vol.51 No.4
Purpose: Although several reports have described the relationship between periodontal disease and cardiovascular disease, information about the association between periodontal disease and the progression of degenerative aortic stenosis (AS) is lacking. Therefore, we performed a retrospective, single-center, pilot study to provide insight into this potential association. Methods: Data from 45 consecutive patients (19 men; median age, 83 years) with mild or moderate degenerative aortic stenosis were analyzed for a mean observation period of 3.3±1.9 years. The total amount of Aggregatibacter actinomycetemcomitans and Porphyromonas gingivalis and titers of serum immunoglobulin G (IgG) against periodontal bacteria and high-sensitivity C-reactive protein (hs-CRP) were evaluated. Aortic valve area (AVA), maximal velocity (Vmax), mean pressure gradient (mean PG), and the Doppler velocity index (DVI) were evaluated. The change in each parameter per year ([Parameter<sub>LATEST</sub>-Parameter<sub>BASELINE</sub>]/Follow-up Years) was calculated from the retrospective follow-up echocardiographic data (baseline vs. the most recently collected data [latest]). Results: No correlation was found between the concentration of periodontopathic bacteria in the saliva and AS status/progression. The anti-P. gingivalis antibody titer in the serum showed a significant positive correlation with AVA and DVI. Additionally, there was a negative correlation between the anti-P. gingivalis IgG antibody titer and mean PG. The hs-CRP concentration showed positive correlations with Vmax and mean PG. Meanwhile, a negative correlation was observed between the anti-P. gingivalis IgG antibody titer and ΔAVA/year and Δmean PG/year. The hs-CRP concentration showed positive correlations with Vmax and mean PG, and it was significantly higher in patients with rapid aortic stenosis progression (ΔAVA/year <-0.1) than in their counterparts. Conclusions: Our results suggest that periodontopathic bacteria such as A. actinomycetemcomitans and P. gingivalis are not directly related to the status/progression of degenerative AS. However, inflammation and a lower immune response may be associated with disease progression.
Jang Woo Choi(崔長雨),Hideaki Nagura(名倉英明),Shoji Enomoto(榎,本昭二) 대한구강악안면외과학회 1990 대한구강악안면외과학회지 Vol.16 No.4
The dentofacial deformities associated with cleft lip and/or palate generally represent various kinds of midfacial underdevelopments, and require surgical intervention appropriate for each natures. The purpose of this study is to reveal the problems on treatment of secondary dentofacial deformities associated with cleft lip and/or palate, and to introduce basic study with experimentally created cleft alveolus and palate monkeys.
최근 5년간의 본 교실에서의 악교정수술증례에 관한 임상통계적 관찰
Jang Woo Choi(崔長雨),Maimi Mitsui(三井妹美),Hideaki Nagura(名倉英明),Shoji Enomoto(榎,本昭二) 대한구강악안면외과학회 1993 대한구강악안면외과학회지 Vol.19 No.3
Dentofacial deformity cases who had undergone orthognathic operation in our department were clinico-statistically observed during the past five years(from 1988 to through 1992). Among the total 1460 cases of inpatients operated in our department duringthe above period, the ratio of dentofacial deformity patients was 16.6% (242 cases) of them. The kind of main causative deformities and the number of cases with each deformity are as follows : macrognathia : 233cases, micrognathia : 3cases, maxillary deficiency : 32 cases, severe skeletal open bite : 2 cases. The classification of operations and number of cases with each operation are as follows : 188 cases of sagittal split ramus osteotomy(SSRO) alone, 29cases of bimaxillary surgery with Le Fort I osteotomy and SSRO, 16cases of intraoral vertical ramus osteotomy(IVRO) combinded with SSRO, 9cases of the others. The number of cases fixed by screw or plate in SSRO cases were 117(62.2%). Reoperations associated with previous orthognathic surgery were performed in 9 cases.