keyword
MENU ▼
Read by QxMD icon Read
search

hirokawa

keyword
https://www.readbyqxmd.com/read/28904306/noninvasive-follicular-thyroid-neoplasm-with-papillary-like-nuclear-features-a-single-institutional-experience-in-japan
#1
Mitsuyoshi Hirokawa, Miyoko Higuchi, Ayana Suzuki, Toshitetsu Hayashi, Seiji Kuma, Akira Miyauchi
Noninvasive encapsulated follicular variant of papillary thyroid carcinoma (PTC) was reclassified as noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP). To date, no studies on NIFTP have been reported in Japan. This study aimed to evaluate the clinical, cytological, and pathological findings of 54 cases of NIFTP from a single center in Japan, and compare them with those in the western countries. There were no significant differences in age, sex, or tumor size between patients with NIFTP and those with invasive encapsulated follicular variant -PTC...
September 12, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28903043/mechanism-of-catalytic-microtubule-depolymerization-via-kif2-tubulin-transitional-conformation
#2
Tadayuki Ogawa, Shinya Saijo, Nobutaka Shimizu, Xuguang Jiang, Nobutaka Hirokawa
Microtubules (MTs) are dynamic structures that are fundamental for cell morphogenesis and motility. MT-associated motors work efficiently to perform their functions. Unlike other motile kinesins, KIF2 catalytically depolymerizes MTs from the peeled protofilament end during ATP hydrolysis. However, the detailed mechanism by which KIF2 drives processive MT depolymerization remains unknown. To elucidate the catalytic mechanism, the transitional KIF2-tubulin complex during MT depolymerization was analyzed through multiple methods, including atomic force microscopy, size-exclusion chromatography, multi-angle light scattering, small-angle X-ray scattering, analytical ultracentrifugation, and mass spectrometry...
September 12, 2017: Cell Reports
https://www.readbyqxmd.com/read/28886336/temperature-sensitive-substrate-and-product-binding-underlie-temperature-compensated-phosphorylation-in-the-clock
#3
Yuta Shinohara, Yohei M Koyama, Maki Ukai-Tadenuma, Takatsugu Hirokawa, Masaki Kikuchi, Rikuhiro G Yamada, Hideki Ukai, Hiroshi Fujishima, Takashi Umehara, Kazuki Tainaka, Hiroki R Ueda
Temperature compensation is a striking feature of the circadian clock. Here we investigate biochemical mechanisms underlying temperature-compensated, CKIδ-dependent multi-site phosphorylation in mammals. We identify two mechanisms for temperature-insensitive phosphorylation at higher temperature: lower substrate affinity to CKIδ-ATP complex and higher product affinity to CKIδ-ADP complex. Inhibitor screening of ADP-dependent phosphatase activity of CKIδ identified aurintricarboxylic acid (ATA) as a temperature-sensitive kinase activator...
September 7, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28883261/fine-needle-aspiration-cytology-for-medullary-thyroid-carcinoma-a-single-institutional-experience-in-japan
#4
Ayana Suzuki, Mitsuyoshi Hirokawa, Nami Takada, Miyoko Higuchi, Aki Ito, Naoki Yamao, Toshitetsu Hayashi, Seiji Kuma, Akira Miyauchi
Many cytological studies on medullary thyroid carcinoma (MTC) have been reported; however, such studies in large series of patients with MTC have not been performed. We investigated MTC at a single institution in Japan using fine-needle aspiration cytology (FNAC), and aimed to establish a preoperative diagnostic algorithm for MTC. FNAC was performed in 119 of 149 patients with nodules (79.9%) who ultimately underwent surgical resection. Moreover, hereditary MTC was diagnosed preoperatively in 22 nodules that did not undergo FNAC (39...
September 5, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28878401/structural-basis-for-crmp2-induced-axonal-microtubule-formation
#5
Shinsuke Niwa, Fumio Nakamura, Yuri Tomabechi, Mari Aoki, Hideki Shigematsu, Takashi Matsumoto, Atsushi Yamagata, Shuya Fukai, Nobutaka Hirokawa, Yoshio Goshima, Mikako Shirouzu, Ryo Nitta
Microtubule associated protein Collapsin response mediator protein 2 (CRMP2) regulates neuronal polarity in developing neurons through interactions with tubulins or microtubules. However, how CRMP2 promotes axonal formation by affecting microtubule behavior remains unknown. This study aimed to obtain the structural basis for CRMP2-tubulin/microtubule interaction in the course of axonogenesis. The X-ray structural studies indicated that the main interface to the soluble tubulin-dimer is the last helix H19 of CRMP2 that is distinct from the known C-terminal tail-mediated interaction with assembled microtubules...
September 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28855636/a-novel-chiral-stationary-phase-lc-ms-ms-method-to-evaluate-oxidation-mechanisms-of-edible-oils
#6
Junya Ito, Naoki Shimizu, Eri Kobayashi, Yasuhiko Hanzawa, Yurika Otoki, Shunji Kato, Takafumi Hirokawa, Shigefumi Kuwahara, Teruo Miyazawa, Kiyotaka Nakagawa
The elucidation of lipid oxidation mechanisms of food is vital. In certain lipids, characteristic lipid hydroperoxide isomers are formed by different oxidation mechanisms (i.e., photo-oxidation or auto-oxidation). For example, linoleic acid is photo-oxidized to 13-9Z, 11E-hydroperoxyoctadecadienoic acid (HPODE), 12-9Z,13E-HPODE, 10-8E,12Z-HPODE and 9-10E,12Z-HPODE, whereas 13-9Z, 11E-HPODE, 13-9E,11E-HPODE, 9-10E,12Z-HPODE and 9-10E,12E-HPODE are formed by auto-oxidation. Therefore, we considered that oxidation mechanisms could be evaluated by analyzing these characteristic positional and cis/trans lipid hydroperoxide isomers...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821980/serum-calcitonin-reference-values-for-calcium-stimulation-tests-by-electrochemiluminescence-immunoassay-in-japanese-men-with-non-medullary-thyroid-carcinoma
#7
Minoru Kihara, Akira Miyauchi, Takumi Kudo, Mitsuyoshi Hirokawa, Akihiro Miya
PURPOSE: Calcitonin is the most sensitive tumor marker of medullary thyroid carcinoma (MTC) and a calcium stimulation test is used to improve this sensitivity. In Japan, the electrochemiluminescence immunoassay (ECLIA) is currently the only test performed to measure serum calcitonin. There is a gender difference in the reference value of serum calcitonin; however, a reference upper limit for use with ECLIA has been reported only for women, but not for men. METHODS: We conducted the calcium stimulation test using ECLIA in 21 men with non-medullary thyroid carcinoma (non-MTC), before and after total thyroidectomy...
August 18, 2017: Surgery Today
https://www.readbyqxmd.com/read/28810260/cytoplasmic-lipid-accumulation-characteristic-of-the-cribriform-variant-of-papillary-thyroid-carcinoma
#8
Nami Takada, Mitsuyoshi Hirokawa, Aki Ito, Ayana Suzuki, Miyoko Higuchi, Seiji Kuma, Toshitetsu Hayashi, Tsutomu Daa, Akira Miyauchi
OBJECTIVE: The purpose of this study was to clarify the diagnostic significance of cytoplasmic lipid accumulation (CLIA) in the cribriform variant of papillary thyroid carcinoma (CV-PTC). METHODS: We performed a histological, immunohistochemical, and cytological examination of 35 CV-PTC cases at the Kuma Hospital. CLIA was defined as bubble-like multivacuolation in cytoplasm with distinct cell border. We also examined 100 conventional PTC (con-PTC) cases as controls...
August 16, 2017: Pathobiology: Journal of Immunopathology, Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28794344/papillary-thyroid-carcinoma-with-desmoid-type-fibromatosis-a-clinical-pathological-and-immunohistochemical-study-of-14-cases
#9
Nami Takada, Mitsuyoshi Hirokawa, Masahiro Ito, Aki Ito, Ayana Suzuki, Miyoko Higuchi, Seiji Kuma, Toshitetsu Hayashi, Masao Kishikawa, Shuichi Horikawa, Akira Miyauchi
Papillary thyroid carcinoma (PTC) with desmoid-type fibromatosis (DTF) is characterized by genetic alterations of the fibroblasts. However, PTC-DTF is extremely rare, and the reports on such cases have been sporadic. Immunohistochemical staining using the antibody for beta-catenin is useful in diagnosing the variant. This report aims to describe the clinical, pathological, and immunohistochemical findings in 14 cases of PTC-DTF and to clarify the diagnostic significance of the variant. The patients included 9 women and 5 men, with a mean age of 49...
August 10, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28794343/comparative-histopathological-analysis-of-sporadic-pediatric-papillary-thyroid-carcinoma-from-japan-and-ukraine
#10
Tetiana I Bogdanova, Vladimir A Saenko, Mitsuyoshi Hirokawa, Masahiro Ito, Liudmyla Yu Zurnadzhy, Toshitetsu Hayashi, Tatiana I Rogounovitch, Akira Miyauchi, Mykola D Tronko, Shunichi Yamashita
This study set out to compare structural and invasive characteristics of sporadic papillary thyroid carcinoma (PTC) in age-matched groups of children and adolescents of Japan and Ukraine to provide detailed histopathological analysis of tumors from different geographical areas with different iodine intake. A total of 348 (160 Japanese and 188 Ukrainian) PTCs from patients without radiation history were analyzed initially as a combined pediatric group and then subdivided into childhood (aged ≤14 years) and adolescent (aged from 15 to ≤18 years) age series...
August 10, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28771766/impact-of-coxsackievirus-a6-emergence-on-hand-foot-and-mouth-disease-epidemic-in-osaka-city-japan
#11
Daiki Kanbayashi, Atsushi Kaida, Seiji P Yamamoto, Yuki Hirai, Hideyuki Kubo, Ryoko Fujimori, Noritaka Hakui, Hidetetsu Hirokawa, Nobuhiro Iritani
Hand, foot, and mouth disease (HFMD) is an acute febrile illness characterized by fever; sore throat; and vesicular eruptions on the hands, feet, and oral mucosa. Until 2010, HFMD was predominantly associated with enterovirus (EV) A71 and coxsackievirus (CV) A16 in Japan. In 2011, CV-A6 emerged as a primary causative agent, causing the largest HFMD epidemic in Japan since 1981. Since then, CV-A6 has caused large HFMD epidemics every 2 years. The phylogenetic analysis of complete Viral Protein 1 (VP1) sequences revealed that most CV-A6 strains detected from 2011 to 2015 in Osaka City were classified into a different clade compared with CV-A6 strains detected from 1999 until 2009...
August 3, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28771360/relative-reactivity-measurements-of-stabilized-ch2oo-produced-by-ethene-ozonolysis-toward-acetic-acid-and-water-vapor-using-chemical-ionization-mass-spectrometry
#12
Ryoji Yajima, Yosuke Sakamoto, Satoshi Inomata, Jun Hirokawa
We investigated the relative reactivity of stabilized CH2OO, produced by ethene ozonolysis, toward acetic acid and water vapor at a temperature of 298 ± 2 K and atmospheric pressure. Hydroperoxymethyl acetate produced through the reaction between stabilized CH2OO and acetic acid was monitored using a chemical ionization mass spectrometer as a function of the acetic acid concentration at different relative humidities. The rate of the reaction between CH2OO and water vapor depended quadratically on the water vapor concentration, suggesting that CH2OO reacted with water dimers in preference to water monomers...
August 18, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28762186/laparoscopic-liver-resection-using-the-lateral-approach-from-intercostal-ports-in-segments-vi-vii-and-viii
#13
Yoshihiro Inoue, Yusuke Suzuki, Kensuke Fujii, Nao Kawaguchi, Masatsugu Ishii, Shinsuke Masubuchi, Masashi Yamamoto, Fumitoshi Hirokawa, Michihiro Hayashi, Kazuhisa Uchiyama
BACKGROUND: Laparoscopic liver resection (LLR) has been developed as a minimally invasive surgery. However, challenges such as difficulty securing visibility and limited control of forceps make it difficult to complete LLR in hepatic segments VI, VII, and VIII. To overcome these challenges, we devised a surgical technique using intercostal ports. We termed this approach the lateral approach. This work describes our experience performing LLR using this approach and discusses the safety and effectiveness of this approach...
July 31, 2017: Journal of Gastrointestinal Surgery: Official Journal of the Society for Surgery of the Alimentary Tract
https://www.readbyqxmd.com/read/28754693/funiculosin-variants-and-phosphorylated-derivatives-promote-innate-immune-responses-via-the-toll-like-receptor-4-myeloid-differentiation-factor-2-complex
#14
Naoki Okamoto, Keisuke Mizote, Hiroe Honda, Akinori Saeki, Yasuharu Watanabe, Tomomi Yamaguchi-Miyamoto, Ryutaro Fukui, Natsuko Tanimura, Yuji Motoi, Sachiko Akashi-Takamura, Tatsuhisa Kato, Shigeto Fujishita, Takahito Kimura, Umeharu Ohto, Toshiyuki Shimizu, Takatsugu Hirokawa, Kensuke Miyake, Koichi Fukase, Yukari Fujimoto, Yoshinori Nagai, Kiyoshi Takatsu
The Toll-like receptor 4 (TLR4)/myeloid differentiation factor-2 (MD-2) complex is essential for LPS recognition and induces innate immune responses against gram-negative bacteria. As activation of TLR4/MD-2 is also critical for the induction of adaptive immune responses, TLR4/MD-2 agonists have been developed as vaccine adjuvants, but their efficacy has not yet been ascertained. Here, we demonstrate that a funiculosin (FNC) variant, FNC-RED, and FNC-RED and FNC derivatives are agonists for both murine and human TLR4/MD-2...
July 28, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28754497/ultrasonography-improves-glycemic-control-by-detecting-insulin-derived-localized-amyloidosis
#15
Minoru Kikuchi, Naoki Hirokawa, Seiya Hagiwara, Hidetaka Nakayama, Shinji Taneda, Naoki Manda, Kouichi Sakata
We examined the feasibility of ultrasound diagnosis of insulin-derived localized amyloidosis (IDLA). In addition to ultrasound detectability and findings, the insulin absorption rate, insulin dosage and hemoglobin A1c (HbA1c) levels before and after shifting the insulin injection site were investigated for 22 cases of IDLA. The detectability of IDLA on ultrasound was 100%; 59.1% was palpable lumps and 40.9% was not palpable. The palpable type had lower echo intensity and were harder than the non-palpable type...
July 25, 2017: Ultrasound in Medicine & Biology
https://www.readbyqxmd.com/read/28715213/probing-the-hydrophobic-binding-pocket-of-g-protein-coupled-lysophosphatidylserine-receptor-gpr34-lps1-by-docking-aided-structure-activity-analysis
#16
Misa Sayama, Asuka Inoue, Sho Nakamura, Sejin Jung, Masaya Ikubo, Yuko Otani, Akiharu Uwamizu, Takayuki Kishi, Kumiko Makide, Junken Aoki, Takatsugu Hirokawa, Tomohiko Ohwada
The ligands of certain G-protein-coupled receptors (GPCRs) have been identified as endogenous lipids, such as lysophosphatidylserine (LysoPS). Here, we analyzed the molecular basis of the structure-activity relationship of ligands of GPR34, one of the LysoPS receptor subtypes, focusing on recognition of the long-chain fatty acid moiety by the hydrophobic pocket. By introducing benzene ring(s) into the fatty acid moiety of 2-deoxy-LysoPS, we explored the binding site's preference for the hydrophobic shape. A tribenzene-containing fatty acid surrogate with modifications of the terminal aromatic moiety showed potent agonistic activity toward GPR34...
July 27, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28709004/mapping-the-neural-substrates-of-behavior
#17
Alice A Robie, Jonathan Hirokawa, Austin W Edwards, Lowell A Umayam, Allen Lee, Mary L Phillips, Gwyneth M Card, Wyatt Korff, Gerald M Rubin, Julie H Simpson, Michael B Reiser, Kristin Branson
Assigning behavioral functions to neural structures has long been a central goal in neuroscience and is a necessary first step toward a circuit-level understanding of how the brain generates behavior. Here, we map the neural substrates of locomotion and social behaviors for Drosophila melanogaster using automated machine-vision and machine-learning techniques. From videos of 400,000 flies, we quantified the behavioral effects of activating 2,204 genetically targeted populations of neurons. We combined a novel quantification of anatomy with our behavioral analysis to create brain-behavior correlation maps, which are shared as browsable web pages and interactive software...
July 13, 2017: Cell
https://www.readbyqxmd.com/read/28701971/facilitating-social-play-for-children-with-pdds-effects-of-paired-robotic-devices
#18
Soichiro Matsuda, Eleuda Nunez, Masakazu Hirokawa, Junichi Yamamoto, Kenji Suzuki
Interacting with toys and other people is fundamental for developing social communication skills. However, children with autism spectrum disorder (ASD) are characterized by having a significant impairment in social interaction, which often leads to deficits in play skills. For this reason, methods of teaching play skills to young children with ASD have been well documented. Although previous studies have examined a variety of instructional strategies for teaching skills, few studies have evaluated the potential of using robotic devices...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28690277/preoperative-diagnostic-algorithm-of-primary-thyroid-lymphoma-using-ultrasound-aspiration-cytology-and-flow-cytometry
#19
Mitsuyoshi Hirokawa, Takumi Kudo, Hisashi Ota, Ayana Suzuki, Kaoru Kobayashi, Akira Miyauchi
The aims of this report were to clarify the diagnostic significance of ultrasound (US), fine needle aspiration cytology (FNAC), and flow cytometry for primary thyroid lymphoma, and to establish a preoperative diagnostic algorithm of primary thyroid lymphoma. We retrospectively examined US, FNAC, and flow cytometry in 43 patients with benign lymphoproliferative lesions and 32 patients with primary thyroid lymphoma, who underwent US, FNAC, and flow cytometry at Kuma Hospital between May 2012 and December 2015...
July 8, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28680002/chromophobe-renal-cell-carcinoma-like-thyroid-carcinoma-a-novel-clinicopathologic-entity-possibly-associated-with-tuberous-sclerosis-complex
#20
Mitsuyoshi Hirokawa, Akira Miyauchi, Minoru Kihara, Takumi Kudo, Yuko Hashimoto, Shinichi Suzuki, Tsutomu Daa, Huy Gia Vuong, Norisato Mitsutake
We report three cases of chromophobe renal cell carcinoma-like thyroid carcinoma as a novel clinicopathologic entity possibly associated with tuberous sclerosis complex. A 15-year-old female, a 19-year-old male, and a 21-year-old male presented with primary thyroid carcinoma. Two of the patients had associated tuberous sclerosis complex. Macroscopically, the carcinomas showed invasive growth. Histologically, the carcinoma cells showed a trabecular pattern with thin vascular stroma, and were characterized by abundant eosinophilic cytoplasm with perinuclear clearing, a prominent cell border, a wrinkled nuclear membrane, and binucleation, which are all features of chromophobe renal cell carcinoma...
July 6, 2017: Endocrine Journal
keyword
keyword
119146
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"