어병세균의 약제내성

Aoki,Takashi 한국어병학회 1993 한국어병학회지 Vol.6 No.1

어병 세균으로부터 분리된 R-plasmid의 특성과 그 DNA 구조는 Aeromonas hydrophila, A. salmonicida, Edwardsiella tarda, Enterococcus seriolicida, Pasteurella piscicida, Vibrio onguillarum등 세균의 종류에 따라 다르다. 그러나 A. hydrophila와 E. tarda로부터 그리고 A. hydrophila와 A. salmonicida로부터 분리된 몇몇 R-plasmid는 같은 내성형을 가지면서 유사한 DNA 구조를 보였다, V. anguillarum에서 분리된 R-plasmid는 1977년 이전, 1980년과 1983년 사이 그리고 1989년과 1991년 사이에 분리된 것이 그 DNA 구조에 차이를 보여 각각 그룹 1, 2, 3으로 구분되어졌다. P. piscicida의 경우에는 연도와 지역에 관계없이 동일한 DNA 구조를 갖는 R-plasmid가 분리되었다. Macrolide계 항생제(MLs), lincomycin(LM), tetracycline(TC) 그리고 MLs, LIM, chloramphenicol(CP) 내성을 나타내는 R-plasmid를 갖는 E. seriolicida가 각 지역의 Yellowtail 어장에 분포되어 있었다. P. piscicida의 R-plasmid에는 type I의 chloramphenicol acetyltransferase(CAT)에 의하여 CP 내성을 나타내는 유전자(cat)가, 그리고 E. tarda, A. salmonicida와 1980년 이후에 분리된 V. anguillarum의 R-plasmid에는 CAT type II에 해당하는 car 유전자가 분포되어 있었다. TC 내성 유전자(tet)의 경우에는 1977년 이전과 1980년 이후에 분리된 V. anguillarum으로부터 class B, G의 tet 유전자가 확인되었으나, E. tarda, P. piscicida, A. hydrophila 그리고 1989년 이후에 분리된 V. anguillarum등 어병세균의 R-plasmid에는 class D의 tet 유전자가 널리 분포하고 있는 것으로 나타났다. The properties and DNA structures of R plasmids differ depending on the species of the fish-pathogens Aeromonas hydrophila, A. salmonicida, Edwardsiella tarda, Enterococcus seriolicida, Pasteurella piscicida and Vibrio anguillarum. However, some R plasmids with the same resistance markers in similar DNA structures were found in A. hydrophila and E. tarda, as well as in A. hydrophila and A. salmonicida. R plasmids from V. anguillarum were classified into three groups according to their DNA structures. The first group was detected before 1977, the second from 1980 to 1983, and the third from 1989 to 1991. R plasmids have been retained within P. piscieida having the same DNA structures and detected at various locations and times. E. seriolicida strains carrying the same R plasmids, which were encoded with resistance to macrolide antibiotics(MLs), lincomycin(LIM), and TC, and to MLs, LIM, and CP. were distributed in yellowtail farms in various districts. The chloramphenicol-resistance(cat) gene of the R plasmids of P. piscicida was classified as CAT type I . The cat of the R plasmids of E, tarda. A. salmonicida was classified as type II. The cat of R plasmids of V. anguillarum was classified into two types. One type detected before 1977, was classified as CAT IV and the other type, detected after 1980, was classified as CAT II. Tetracycline-resistance (tet) V. anguillarum, isolated before 1977 and after 1981, was classified as Tet B and Tet G, respectively. The class D tet gene was widely distributed in R plasmids from fish-pathogens A. hydrophila, E. tarda, P. piscicida, and also V. anguillarum isolated after 1989.

일본 고대 도성 조영의 진제(鎮祭)와 수변(水邊) 제사

靑木敬(Aoki takashi),오택현(역) 한국목간학회 2018 목간과 문자 Vol.0 No.20

본고는 도성 조영에 관련된 地鎭具의 사례를 개관하고, 용기의 유무를 통해 地鎭의 대상 범위가 다를 수 있다는 것에 대해 살펴보았다. 또 수변제사는 여러 신앙이 복합된 제사의 체계를 이루고 있을 사료나 출토된 자료를 통해 확인할 수 있었다. 하지만 제사의 주체자의 경우는 불명확한 부분이 많이 남아 있어, 주체자를 포함한 구체적 검증은 이후 연구를 기대하고자 한다. This paper examines the examples of utensils used in ancestral rites(地鎭具) related to the construction of the capital and discusses whether the utensils have a container or not may imply different scope of the service. It was also confirmed from the historical record and excavated materials that ancestral rites performed at watersides had a ceremonial structure with various religions combined. However, there are unclear points about the presider of the ceremony, which is expected to be delved in and verified by future researchers.

Early Improvement and Marriage Are Determinants of the 12-Month Treatment Outcome of Paroxetine in Outpatients with Panic Disorder

Takashi Watanabe,Mikito Ueda,Shin Ishiguro,Yuki Hayashi,Akiko Aoki,Masataka Shinozaki,Kazuko Kato,Kazufumi Akiyama,Kazutaka Shimoda 대한정신약물학회 2017 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.15 No.4

Objective: In this study, we investigated the determinants of remission and discontinuation of paroxetine pharmacotherapy in outpatients with panic disorder (PD). Methods: Subjects were 79 outpatients diagnosed with PD who took 10-40 mg/day of paroxetine for 12 months. The candidate therapeutic determinants included the serotonin transporter gene-linked polymorphic region and the −1019C/G promoter polymorphism of the serotonin receptor 1A as genetic factors, educational background and marital status as environmental factors, and early improvement (EI) at 2 weeks as a clinical factor were assessed. The Clinical Global Impression scale was used to assess the therapeutic effects of the pharmacotherapy. Results: Cox proportional hazards regression was performed to investigate the significant predictive factors of remission and discontinuation. EI was only a significant predictive factor of remission. EI was a significant predictive factor of remission (hazard ratio [HR], 2.709; 95% confidence interval [CI], 1.177-6.235). Otherwise, EI and marital status were significant predictive factors of the discontinuation. EI (HR, 0.266; 95% CI, 0.115-0.617) and being married (HR, 0.437; 95% CI, 0.204-0.939) were considered to reduce the risk of treatment discontinuation. In married subjects, EI was a significant predictive factor of the discontinuation (HR, 0.160; 95% CI, 0.045-0.565). However, in unmarried subjects, EI was not a significantly predictive factor for the discontinuation. Conclusion: EI achievement appears to be a determinant of PD remission in paroxetine treatment. In married PD patients, EI achievement also appears to reduce a risk of discontinuation of paroxetine treatment

Screening for Lynch syndrome using risk assessment criteria in patients with ovarian cancer

Takashi Takeda,Kosuke Tsuji,Kouji Banno,Megumi Yanokura,Yusuke Kobayashi,Eiichiro Tominaga,Daisuke Aoki 대한부인종양학회 2018 Journal of Gynecologic Oncology Vol.29 No.3

Objective: Lynch syndrome is a cancer predisposition syndrome caused by germline mutation of DNA mismatch repair (MMR) genes. Lynch syndrome only causes about 0.4% of cases of ovarian cancer, which suggests that universal screening may not be cost-efficient. However, the frequency of Lynch syndrome in ovarian cancer is unclear in the Asian population. The goal of the study was to investigate a screening strategy using family history. Methods: The subjects were 129 patients with ovarian cancer. Clinical and family history were collected using a self-administered questionnaire, and Society of Gynecologic Oncology (SGO) criteria 2007 and PREMM5 were used for risk assessment. Microsatellite instability, immunohistochemistry, and methylation of MMR genes were analyzed. Results: Of the 129 cases, 25 (19.4%) met the SGO criteria, and 4 of these 25 had MSI-high and MMR deficiency. Two cases had loss of MSH2 and MSH6, indicating MSH2 mutation, and the other two had loss of MLH1 and PMS2, including one without MLH1 methylation indicating MLH1 mutation. These results show that screening using family history can detect Lynch syndrome in 12.0% (3/25) of ovarian cancer cases. The 3 cases were positive for PREMM5, but negative for Amsterdam II criteria and revised Bethesda guidelines. Genetic testing in one case with MSH2 and MSH6 deficiency confirmed the diagnosis of Lynch syndrome with MSH2 mutation. Conclusion: This is the first study of screening for Lynch syndrome in ovarian cancer using clinical and family history in an Asian population. This approach may be effective for diagnosis in these patients.

Damage propagation in CFRP laminates subjected to low velocity impact and static indentation

Aoki, Yuichiro,Suemasu, Hiroshi,Ishikawa, Takashi The Korean Society for Composite Materials 2007 Advanced composite materials Vol.16 No.1

This paper describes a damage accumulation mechanism in cross-ply CFRP laminates $[0_2/90_2]_{2S}$ subjected to out-of-plane loading. Drop-weight impact and static indentation tests were carried out, and induced damage was observed by ultrasonic C-scan and an optical microscope. Both tests gave essentially the same results for damage modes, sizes, and load-deformation history. First, a crack occurred in the bottom $0^{\circ}$ layer accompanying some delamination along the crack caused by bending stress. Then, transverse cracks occurred in the middle $90^{\circ}$ layer with decreasing contact force between the specimen and the indenter. Measured local strains near the impact point showed that the stress state changed from a bending dominant state to an in-plane tensile dominant state. A cohesive interface element was used to simulate the propagation of multiple delaminations and transverse cracks under static indentation. Two types of analytical models are considered, one with multiple delaminations and the other with both multiple delaminations and transverse cracks. The damage obtained for the model with only multiple delaminations was quite different from that obtained from the experiment. However, the results obtained from the model with both delaminations and transverse cracks well explain the characteristics of the damage obtained in the experiment. The existence of the transverse cracks is essential to form the characteristic impact damage.

Genetic Polymorphism of 1019C/G (rs6295) Promoter of Serotonin 1A Receptor and Catechol-O-Methyltransferase in Panic Disorder

Takashi Watanabe,Shin Ishiguro,Akiko Aoki,Mikito Ueda,Yuki Hayashi,Kazufumi Akiyama,Kazuko Kato,Kazutaka Shimoda1 대한신경정신의학회 2017 PSYCHIATRY INVESTIGATION Vol.14 No.1

Objective-Family and twin studies have suggested genetic liability for panic disorder (PD) and therefore we sought to determine the role of noradrenergic and serotonergic candidate genes for susceptibility for PD in a Japanese population. Methods-In this age-and gender-matched case-control study involving 119 PD patients and 119 healthy controls, we examined the genotype distributions and allele frequencies of the serotonin transporter gene linked polymorphic region (5-HTTLPR), -1019C/G (rs6295) promoter polymorphism of the serotonin receptor 1A (5-HT1A), and catechol-O-methyltransferase (COMT) gene polymorphism (rs4680) and their association with PD. Results-No significant differences were evident in the allele frequencies or genotype distributions of the COMT (rs4680), 5-HTTLPR polymorphisms or the -1019C/G (rs6295) promoter polymorphism of 5-HT1A between PD patients and controls. Although there were no significant associations of these polymorphisms with in subgroups of PD patients differentiated by gender or in subgroup comorbid with agoraphobia (AP), significant difference was observed in genotype distributions of the -1019C/G (rs6295) promoter polymorphism of 5-HT1A between PD patients without AP and controls (p=0.047). Conclusion-In this association study, the 1019C/G (rs6295) promoter polymorphism of the 5-HT1A receptor G/G genotype was associated with PD without AP in a Japanese population.

Repression of nascent strand elongation by deregulated Cdt1 during DNA replication in Xenopus egg extracts.

Tsuyama, Takashi,Watanabe, Saori,Aoki, Ayako,Cho, Yunje,Seki, Masayuki,Enomoto, Takemi,Tada, Shusuke American Society for Cell Biology 2009 Molecular biology of the cell Vol.20 No.3

<P>Excess Cdt1 reportedly induces rereplication of chromatin in cultured cells and Xenopus egg extracts, suggesting that the regulation of Cdt1 activity by cell cycle-dependent proteolysis and expression of the Cdt1 inhibitor geminin is crucial for the inhibition of chromosomal overreplication between S phase and metaphase. We analyzed the consequences of excess Cdt1 for DNA replication and found that increased Cdt1 activity inhibited the elongation of nascent strands in Xenopus egg extracts. In Cdt1-supplemented extracts, overreplication was remarkably induced by the further addition of the Cdt1-binding domain of geminin (Gem79-130), which lacks licensing inhibitor activity. Further analyses indicated that fully active geminin, as well as Gem79-130, restored nascent strand elongation in Cdt1-supplemented extracts even after the Cdt1-induced stalling of replication fork elongation had been established. Our results demonstrate an unforeseen, negative role for Cdt1 in elongation and suggest that its function in the control of replication should be redefined. We propose a novel surveillance mechanism in which Cdt1 blocks nascent chain elongation after detecting illegitimate activation of the licensing system.</P>

Evaluation of CD4+ cells infiltration as a prognostic factor in cervical intraepithelial neoplasia 2

Guanliang Chen,Takashi Iwata,Masaki Sugawara,Hiroshi Nishio,Yuki Katoh,Iwao Kukimoto,Daisuke Aoki 대한부인종양학회 2023 Journal of Gynecologic Oncology Vol.34 No.1

Objective: To identify candidate predictors for the prognosis of cervical intraepithelial neoplasia 2 (CIN2) lesions and evaluate the prognostic value of the local immune response. Methods: One hundred fifteen CIN2 patients were enrolled. The percentage of p16-, minichromosome maintenance complex component 2- or apolipoprotein B mRNA editing enzyme catalytic subunit 3G (APOBEC3G)-positive cells was determined immunohistochemically. Tumor-infiltrating lymphocytes (TILs) in intertumoral lesions were scored using an automated system. CIN3 disease progression and regression rates were estimated by the Kaplan–Meier method. A case-control study was conducted to screen CIN2 prognostic factors in 10 regression and 10 progression patients. Selected factors were examined in a cohort study to determine their prognostic value for CIN2. Results: Among all participants, the cumulative progression and regression rates at 60 months were 0.477 and 0.510, respectively. In the case-control study, p16- and APOBEC3G-positive cells were higher in the progression group (p=0.043, p=0.023). Additionally, CD4+ cell infiltration was enhanced in the regression group (p=0.023). The cohort study revealed a significantly increased progression rate in patients with elevated p16-positive cells (p<0.001), and increased CD4+ TIL infiltration was associated with better regression (p=0.011). Kaplan–Meier analysis according to human papillomavirus (HPV) positivity revealed a greater CIN3 development risk in HPV16-positive patients than in HPV16-negative cases. Finally, multivariate analysis identified HPV16 infection and CD4+ TIL infiltration as independent prognostic factors in CIN2 regression. Conclusion: CD4+ TIL infiltration in intertumoral lesions was related with CIN2 regression. Our findings suggest CD4+ TIL infiltration may be useful for the triage of CIN2 patients.

A Detection Method for Nodular Shadows from Temporal Subtraction Images Using A Machine Learning Technique Incorporated Radiomics Features

Natsuho Baba,Tohru Kamiya,Takashi Terasawa,Takatoshi Aoki,Shoji Kido 제어로봇시스템학회 2023 제어로봇시스템학회 국제학술대회 논문집 Vol.2023 No.10

Electrochemical Fabrication of Superhydrophobic and Superoleophobic Surfaces on Metals

Hiroki Habazaki,Katsutoshi Nakayama,Takashi Fujii,Shu Yang,Etsushi Tsuji,Yoshitaka Aoki 한국표면공학회 2013 한국표면공학회 학술발표회 초록집 Vol.2013 No.11