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https://www.readbyqxmd.com/read/28183081/management-of-abdominal-drainage-after-hepatic-resection
#1
Yoshihiro Inoue, Yoshiro Imai, Nao Kawaguchi, Fumitoshi Hirokawa, Michihiro Hayashi, Kazuhisa Uchiyama
BACKGROUND: Routine drainage after partial hepatic resection has long been controversial. METHODS: Three hundred and twenty-eight patients who underwent hepatic resections for liver tumors without biliary-enteric and gastrointestinal anastomoses were analyzed using propensity score matching analysis with respect to if and when a prophylactic drain was used and for how long. The criteria for drain placement were established and validated. RESULTS: Our criteria for drain placement were chosen according to postoperative percutaneous abdominal drainage risk factors, organ/space surgical site infections (SSIs), hepatic resection method, intraoperative bile leakage and operative time (≥300 min)...
February 10, 2017: Digestive Surgery
https://www.readbyqxmd.com/read/28178316/md-simulation-of-the-tat-cyclin-t1-cdk9-complex-revealing-the-hidden-catalytic-cavity-within-the-cdk9-molecule-upon-tat-binding
#2
Kaori Asamitsu, Takatsugu Hirokawa, Takashi Okamoto
In this study, we applied molecular dynamics (MD) simulation to analyze the dynamic behavior of the Tat/CycT1/CDK9 tri-molecular complex and revealed the structural changes of P-TEFb upon Tat binding. We found that Tat could deliberately change the local flexibility of CycT1. Although the structural coordinates of the H1 and H2 helices did not substantially change, H1', H2', and H3' exhibited significant changes en masse. Consequently, the CycT1 residues involved in Tat binding, namely Tat-recognition residues (TRRs), lost their flexibility with the addition of Tat to P-TEFb...
2017: PloS One
https://www.readbyqxmd.com/read/28176151/frequent-braf-v600e-and-absence-of-tert-promoter-mutations-characterize-sporadic-pediatric-papillary-thyroid-carcinomas-in-japan
#3
Naoki Oishi, Tetsuo Kondo, Tadao Nakazawa, Kunio Mochizuki, Tomohiro Inoue, Kazunari Kasai, Ippei Tahara, Tomonori Yabuta, Mitsuyoshi Hirokawa, Akira Miyauchi, Ryohei Katoh
Pediatric papillary thyroid carcinoma (PTC) has unique features but requires further genetic investigation. Moreover, there has been increasing concern about the risk for pediatric PTC in Japan after the Fukushima accident. This study aims to evaluate the frequencies of BRAF and TERT promoter mutations and to examine their significance in non-radiation-associated pediatric PTCs in Japan. We enrolled 81 pediatric PTC patients aged ≤20 years. The control group included 91 adult PTCs from patients >20 years old...
February 7, 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/28150740/tert-promoter-mutations-and-ki-67-labeling-index-as-a-prognostic-marker-of-papillary-thyroid-carcinomas-combination-of-two-independent-factors
#4
Michiko Matsuse, Tomonori Yabuta, Vladimir Saenko, Mitsuyoshi Hirokawa, Eijun Nishihara, Keiji Suzuki, Shunichi Yamashita, Akira Miyauchi, Norisato Mitsutake
Although most papillary thyroid carcinomas (PTCs) have a good prognosis, a small but certain fraction shows aggressive behavior. Therefore, a novel and well-performing molecular marker is needed. In the present study, we assessed the impact of the combination of the TERT promoter/BRAF mutations and Ki-67 labeling index (LI) as a prognostic marker in PTC patients. Of 400 PTC samples, 354 were successfully genotyped for both TERT promoter/BRAF and analyzed for Ki-67 LI. Based on the combination of the mutational status and Ki-67 LI, the cases were categorized into three groups: high-, middle-, and low-risk...
February 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28112749/reduced-intensity-conditioning-allogeneic-hematopoietic-cell-transplantation-for-younger-patients-with-acute-myeloid-leukemia-a-registry-based-study
#5
M Yanada, S Kurosawa, T Kobayashi, Y Ozawa, H Kanamori, N Kobayashi, M Sawa, H Nakamae, N Uchida, H Hashimoto, T Fukuda, M Hirokawa, Y Atsuta, S Yano
Clinical efficacy of allogeneic hematopoietic cell transplantation (HCT) using reduced-intensity conditioning (RIC) for younger patients remains unclear. We therefore performed a retrospective registry-based study to evaluate outcomes for patients with AML aged between 16 and 49 years who underwent RIC allogeneic HCT. Patients receiving RIC (N=125) showed significantly worse survival than those receiving myeloablative conditioning (MAC; N=1,554) (47.7% for RIC and 54.2% for MAC at 4 years, P=0.047). However, the difference became marginal after adjustment for patient characteristics (P=0...
January 23, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28097410/intercostal-trocars-enable-easier-laparoscopic-resection-of-liver-tumors-in-segments-7-and-8
#6
Fumitoshi Hirokawa, Michihiro Hayashi, Mitsuhiro Asakuma, Tetsunosuke Shimizu, Yoshihiro Inoue, Kazuhisa Uchiyama
BACKGROUND: Laparoscopic resection of posterosuperior (PS) tumors of the liver is more difficult than that of anterolateral (AL) tumors, owing to the narrow surgical field in the PS location. In this retrospective cohort study, our aim was to determine if port insertion through the intercostal space would lead to improved outcomes for laparoscopic resection of tumors in PS liver segments 7 and 8. METHOD: Between January 2006 and December 2015, 153 patients underwent laparoscopic resection of solitary liver tumors at Osaka Medical College Hospital...
January 17, 2017: World Journal of Surgery
https://www.readbyqxmd.com/read/28090072/reconsideration-of-inferior-vena-cava-parameters-for-estimating-right-atrial-pressure-in-an-east-asian-population%C3%A3-comparative-simultaneous-ultrasound-catheterization-study
#7
Takayuki Kawata, Masao Daimon, Seitetsu L Lee, Koichi Kimura, Naoko Sawada, Shuo-Ju Chiang, Keitaro Mahara, Takeshi Okubo, Tomoko Nakao, Megumi Hirokawa, Boqing Xu, Tomoko S Kato, Masafumi Watanabe, Yutaka Yatomi, Issei Komuro
BACKGROUND: Ultrasound measurements of the inferior vena cava (IVC) diameter (IVCD), together with its respiratory variation, provide a noninvasive estimate of right atrial pressure (RAP). However, there is a paucity of studies that have compared this technique with simultaneous catheterization. We explored the best cut-off values of IVC parameters for elevated RAP in comparison with RAP measured by catheterization.Methods and Results:We prospectively enrolled 120 East Asian patients who were scheduled for catheterization...
January 13, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/28047496/su-g-brb-17-dosimetric-evaluation-of-the-respiratory-interplay-effect-during-vmat-delivery-using-ipagat-polymer-gel-dosimeter
#8
K Ono, S Fujimoto, S Hayashi, K Hioki, M Miyazawa, Y Akagi, Y Hirokawa
PURPOSE: To evaluate the dosimetric impact of the interplay effect between multileaf collimator (MLC) movement and tumor respiratory motion during delivery of volumetric modulate arc therapy (VMAT) by using customized polymer gel dosimeter. METHODS: Polyacrylamide-based gel dosimeter contained magnesium chloride as a sensitizer (iPAGAT) was used in this study. An excellent gas barrier PAN (BAREX) techno bottle (φ8 cm, 650 mL) filled with iPAGAT was set to the QUASAR™ respiratory motion phantom, and was moved with motion amplitudes of 1 and 2 cm with a 4 second period during VMAT delivery by the Novalis Tx linear accelerator (Varian/BrainLAB)...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28041619/simultaneous-determination-of-aliphatic-aromatic-and-heterocyclic-biogenic-amines-without-derivatization-by-capillary-electrophoresis-and-application-in-beer-analysis
#9
Lili He, Zhongqi Xu, Takeshi Hirokawa, Li Shen
Biogenic amines (BAs) play significant roles in indicating human health or food quality. Aiming to simultaneously determine three structures (aliphatic, aromatic and heterocyclic) of underivatized BAs, we explored a simple and rapid capillary electrophoresis (CE) method only coupled with conventional UV detector for the separation of thirteen key BAs. The strategy is to choose a UV absorbing probe as co-ion in the background electrolyte (BGE), and different BAs could be characterized by positive or negative peaks according to the fact that their UV absorptivity coefficients at a certain wavelength are better or worse than that of the UV absorbing probe...
January 27, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28025493/analysis-to-estimate-genetic-variations-in-the-idarubicin-resistant-derivative-molt-3
#10
Tomoyoshi Komiyama, Atsushi Ogura, Takatsugu Hirokawa, Miao Zhijing, Hiroshi Kamiguchi, Satomi Asai, Hayato Miyachi, Hiroyuki Kobayashi
Gene alterations are a well-established mechanism leading to drug resistance in acute leukemia cells. A full understanding of the mechanisms of drug resistance in these cells will facilitate more effective chemotherapy. In this study, we investigated the mechanism(s) of drug resistance in the human acute leukemia cell line MOLT-3 and its idarubicin-resistant derivative MOLT-3/IDR through complete mitochondrial and nuclear DNA analyses. We identified genetic differences between these two cell lines. The ND3 mutation site (p...
December 22, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28024406/the-effect-of-conformational-flexibility-on-binding-free-energy-estimation-between-kinases-and-their-inhibitors
#11
Mitsugu Araki, Narutoshi Kamiya, Miwa Sato, Masahiko Nakatsui, Takatsugu Hirokawa, Yasushi Okuno
Accurate prediction of binding affinities of drug candidates to their targets remains challenging because of protein flexibility in solution. Conformational flexibility of the ATP-binding site in the CDK2 and ERK2 kinases was identified using molecular dynamics simulations. The binding free energy (ΔG) of twenty-four ATP-competitive inhibitors toward these kinases was assessed using an alchemical free energy perturbation method, MP-CAFEE. However, large calculation errors of 2-3 kcal/mol were observed using this method, where the free energy simulation starts from a single equilibrated conformation...
December 27, 2016: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28018495/postoperative-venous-thromboembolism-in-patients-undergoing-endovenous-laser-and-radiofrequency-ablation-of-the-saphenous-vein
#12
Nobuhisa Kurihara, Masayuki Hirokawa, Takashi Yamamoto
Objective: Endovenous laser ablation (EVLA) and radiofrequency ablation (RFA) are safe and effective treatments for varicose veins caused by saphenous reflux. Deep venous thrombosis (DVT) and endovenous heat-induced thrombosis (EHIT) are known complications of these procedures. The purpose of this article is to investigate the incidence of postoperative DVT and EHIT in patients undergoing EVLA and RFA. Methods: The patients were assessed by clinical examination and venous duplex ultrasonography before operation and at 24-72 hours, 1 month, and 1 year follow-up after operation...
2016: Annals of Vascular Diseases
https://www.readbyqxmd.com/read/27998670/improvement-of-1-3-propanediol-production-using-an-engineered-cyanobacterium-synechococcus-elongatus-by-optimization-of-the-gene-expression-level-of-a-synthetic-metabolic-pathway-and-production-conditions
#13
Yasutaka Hirokawa, Yuki Maki, Taizo Hanai
The introduction of a synthetic metabolic pathway consisting of multiple genes derived from various organisms enables cyanobacteria to directly produce valuable chemicals from carbon dioxide. We previously constructed a synthetic metabolic pathway composed of genes from Escherichia coli, Saccharomyces cerevisiae, and Klebsiella pneumoniae. This pathway enabled 1,3-propanediol (1,3-PDO) production from cellular DHAP via glycerol in the cyanobacterium, Synechococcus elongatus PCC 7942. The production of 1,3-PDO (3...
January 2017: Metabolic Engineering
https://www.readbyqxmd.com/read/27990564/planarian-cholinesterase-in-vitro-characterization-of-an-evolutionarily-ancient-enzyme-to-study-organophosphorus-pesticide-toxicity-and-reactivation
#14
Danielle Hagstrom, Hideto Hirokawa, Limin Zhang, Zoran Radic, Palmer Taylor, Eva-Maria S Collins
The freshwater planarian Dugesia japonica has recently emerged as an animal model for developmental neurotoxicology and found to be sensitive to organophosphorus (OP) pesticides. While previous activity staining of D. japonica, which possess a discrete cholinergic nervous system, has shown acylthiocholine catalysis, it is unknown whether this is accomplished through an acetylcholinesterase (AChE), butyrylcholinesterase (BChE), or a hybrid esterase and how OP exposure affects esterase activity. Here, we show that the majority of D...
December 18, 2016: Archives of Toxicology
https://www.readbyqxmd.com/read/27956273/high-endothelial-venule-like-vessels-and-lymphocyte-recruitment-in-diffuse-sclerosing-variant-of-papillary-thyroid-carcinoma
#15
Shulin Low, Yasuhiro Sakai, Hitomi Hoshino, Mitsuyoshi Hirokawa, Hiroto Kawashima, Kayoko Higuchi, Yoshiaki Imamura, Motohiro Kobayashi
Diffuse sclerosing variant of papillary thyroid carcinoma (DSPTC) is a rare subtype of papillary thyroid carcinoma with a high incidence of lymph node metastasis. One of its characteristic histological features is the presence of dense lymphocyte infiltrates; however, how these lymphocytes are recruited in this pathological setting remains unclear. Here, we analysed 17 DSPTC cases immunohistologically for cell adhesion molecules expressed on endothelial cells. We found that venules morphologically similar to high endothelial venules (HEVs) in secondary lymphoid organs were induced in lymphoid aggregates in DSPTC, and such HEV-like vessels expressed 6-sulfo sialyl Lewis X (sLeX) glycans as well as intercellular adhesion molecule 1 (ICAM-1)...
December 2016: Pathology
https://www.readbyqxmd.com/read/27936243/can-wound-exudate-from-venous-leg-ulcers-measure-wound-pain-status-a-pilot-study
#16
Taichi Goto, Nao Tamai, Gojiro Nakagami, Aya Kitamura, Ayumi Naito, Masayuki Hirokawa, Chisako Shimokawa, Kazuo Takahashi, Junichi Umemoto, Hiromi Sanada
We investigated the associations between the self-evaluated pain status and two pain biomarker candidates, nerve growth factor and S100A8/A9, in exudate from venous leg ulcer to finally develop an objective pain evaluation method. Patients with venous leg ulcer participated in this cross-sectional observational study conducted between April and October 2014 at two medical facilities. During routine wound care, each participant self-evaluated their pain status at each examination using the 10-point numerical rating scale (present pain intensity) and the short-form McGill Pain Questionnaire 2 (continuous pain, intermittent pain, neuropathic pain, affective descriptors, and total score)...
2016: PloS One
https://www.readbyqxmd.com/read/27896410/low-incidence-of-lymph-node-metastasis-after-resection-of-hepatitis-virus-related-intrahepatic-cholangiocarcinoma
#17
Hiroya Iida, Masaki Kaibori, Shogo Tanaka, Shigekazu Takemura, Hiroshi Wada, Fumitoshi Hirokawa, Takuya Nakai, Michihiro Hayashi, Hidetoshi Eguchi, Shoji Kubo
BACKGROUND AND OBJECTIVES: We determined the rates of initial lymph node metastasis following curative resection of mass-forming type-intrahepatic cholangiocarcinoma (ICC) in patients with and without hepatitis virus infection. METHODS: We enrolled 87 patients between January 2000 and December 2013 with ICC without preoperative lymph node metastasis and without lymph node dissection. Patients included 32 who were seropositive for hepatitis B or C virus (virus group) and 55 who had no evidence of hepatitis virus infection (nonvirus group)...
November 28, 2016: World Journal of Surgery
https://www.readbyqxmd.com/read/27871684/the-utility-of-5-aminolevulinic-acid-mediated-photodynamic-diagnosis-in-the-detection-of-intraoperative-bile-leakage
#18
Yoshihiro Inoue, Yoshiro Imai, Kensuke Fujii, Fumitoshi Hirokawa, Michihiro Hayashi, Kazuhisa Uchiyama
PURPOSE: The purpose of this retrospective study was to evaluate the utility of the new intraoperative bile leakage test as a preventive measure of postoperative bile leakage. METHOD: 737 patients were retrospectively analyzed with respect to the management of intra- and post-operative bile leakage. RESULTS: Nine (8.3%) of 109 patients evaluated using conventional white light fluorescent imaging were recognized as having intra-operative bile leakage...
October 8, 2016: American Journal of Surgery
https://www.readbyqxmd.com/read/27862483/cytological-features-of-solid-variants-of-papillary-thyroid-carcinoma-a-fine-needle-aspiration-cytology-study-of-18-cases
#19
M Higuchi, M Hirokawa, A Suzuki, N Takada, N Yamao, S Kuma, A Miyauchi
OBJECTIVE: Solid variants of papillary thyroid carcinoma (SV-PTC) are rare, and there have been few reports describing the cytological findings of such variants. METHODS: The cytological features of cellular specimens aspirated from 18 histologically confirmed SV-PTC cases were evaluated, retrospectively. RESULTS: Solid and small papillary clusters were observed in 14 (77.8%) and 13 (72.2%) cases, respectively. The incidences of large papillary clusters (11...
November 13, 2016: Cytopathology: Official Journal of the British Society for Clinical Cytology
https://www.readbyqxmd.com/read/27824288/genotype-analyses-in-the-japanese-and-belarusian-populations-reveal-independent-effects-of-rs965513-and-rs1867277-but-do-not-support-the-role-of-foxe1-polyalanine-tract-length-in-conferring-risk-for-papillary-thyroid-carcinoma
#20
Alyaksandr V Nikitski, Tatiana I Rogounovitch, Andrey Bychkov, Meiko Takahashi, Koh-Ichiro Yoshiura, Norisato Mitsutake, Takahisa Kawaguchi, Michiko Matsuse, Valentina M Drozd, Yuri Demidchik, Eijun Nishihara, Mitsuyoshi Hirokawa, Akira Miyauchi, Alexander V Rubanovich, Fumihiko Matsuda, Shunichi Yamashita, Vladimir A Saenko
BACKGROUND: Several functional single-nucleotide polymorphisms (SNPs) at the FOXE1 locus on chromosome 9q22.33 have been associated with the risk for papillary thyroid carcinoma (PTC). This study set out to elucidate whether their effects are independent, using genotyping results in populations of Asian and European descent. METHODS: SNPs rs965513 and rs1867277 and a polymorphic region determining the length of the FOXE1 polyalanine (poly-Ala) tract were genotyped in 501 patients with PTC and 748 healthy individuals from Japan, and in 660 patients and 820 population controls from Belarus...
February 2017: Thyroid: Official Journal of the American Thyroid Association
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