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Kaori Wakabayashi, Takahiko Umahara, Katsuiku Hirokawa, Haruo Hanyu, Toshiki Uchihara
α-Synuclein shares structural homology with 14-3-3 proteins. Seven 14-3-3 protein isoforms have been identified in mammals. Among them, the 14-3-3 sigma isoform was initially considered absent in the mammalian brain. However, we previously identified immunohistochemical association of 14-3-3 sigma with Pick bodies. Because 14-3-3 isoforms other than sigma isoform have been identified in Lewy bodies, we were prompted to look for this 14-3-3 sigma-like immunoreactivity (IR) in Lewy bodies in the brainstem, cerebral cortex, and Lewy neurites in seven patients with Lewy body disease...
March 16, 2018: Neuroscience Letters
Yoshihiro Inoue, Kensuke Fujii, Keitaro Tashiro, Masatsugu Ishii, Shinsuke Masubuchi, Masashi Yamamoto, Tetsunosuke Shimizu, Mitsuhiro Asakuma, Fumitoshi Hirokawa, Michihiro Hayashi, Yoshihumi Narumi, Kazuhisa Uchiyama
BACKGROUND: Various chemotherapy regimens have been shown to improve outcomes when administered before tumor excision surgery. However, there is no consensus on the utility of multidisciplinary treatment with preoperative chemotherapy for treating colorectal liver metastasis (CLM). MATERIALS AND METHODS: Two hundred-fifty patients who underwent hepatectomy were retrospectively analyzed using propensity score matching. Postoperative outcomes were evaluated with a focus on the effect of pre-hepatectomy chemotherapy on regeneration of the remnant liver in patients with CLM...
March 16, 2018: World Journal of Surgery
Ayana Suzuki, Mitsuyoshi Hirokawa, Aki Ito, Nami Takada, Miyoko Higuchi, Toshitetsu Hayashi, Seiji Kuma, Tsutomu Daa, Akira Miyauchi
The pathogenesis of thyroid lymphoepithelial cysts is controversial, and two hypotheses have been proposed, namely derivation from branchial-derived remnants or from squamous metaplasia of the follicular cells. The aim of this study was to clarify the pathogenesis of thyroid lymphoepithelial cysts. We performed pathological and immunohistochemical examination of 21 thyroid lymphoepithelial cysts, 13 non-neoplastic squamous metaplasia samples without thyroid carcinoma, 13 solid cell nests, and 14 lateral cervical cysts...
March 14, 2018: Endocrine Journal
Yuzo Maeda, Hiroki Takahashi, Nozomu Nakai, Takeshi Yanagita, Nanako Ando, Tomotaka Okubo, Kenta Saito, Kazuyoshi Shiga, Takahisa Hirokawa, Masayasu Hara, Hideyuki Ishiguro, Yoichi Matsuo, Shuji Takiguchi
Apigenin is a natural flavonoid that exhibits anti-proliferative activity and induces apoptosis in various types of cancer, including colon cancer. The aim of the present study was to determine the mechanism underlying the apoptosis-inducing effect of apigenin in colon cancer. Apigenin reduced the proliferation of colon cancer cell lines, stimulated the cleavage of PARP and induced apoptosis in a dose-dependent manner. Apigenin treatment also suppressed the expression of the anti-apoptotic proteins Bcl-xL and Mcl-1...
March 7, 2018: International Journal of Oncology
Masanori Tsukamoto, Jun Hirokawa, Takashi Hitosugi, Takeshi Yokoyama
Tracheal bronchus is an ectopic bronchus almost arising from the right side of the tracheal wall above the carina. The incidence of a tracheal bronchus is reported as 0.1 to 3%. We experienced a patient with tracheal bronchus that was incidentally found at induction of anesthesia. Endotracheal intubation in a patient with tracheal bronchus might cause obstruction of the tracheal bronchus, although in this case, ventilation was not impaired.
2018: Anesthesia Progress
Yosuke Sakamoto, Motoki Goda, Jun Hirokawa
The heterogeneous release of molecular bromine, Br2 , from the reaction between gaseous ozone and aqueous bromide ion in sea water ice and sea salt aerosols is considered to be an initial source of reactive bromine species in the troposphere. Recent studies have demonstrated that the uptake of ozone by aqueous bromide solution is promoted by reactions at the gas-liquid interface. The present work investigated the heterogeneous reaction between gaseous ozone and aqueous bromide solution at atmospheric pressure and room temperature using a wetted wall flow reactor combined with a chemical ionization mass spectrometer...
February 26, 2018: Journal of Physical Chemistry. A
Tetsunosuke Shimizu, Mitsuhiro Asakuma, Atsushi Tomioka, Yoshihiro Inoue, Fumitoshi Hirokawa, Michihiro Hayashi, Kazuhisa Uchiyama
Because pancreatic cancer is a disease with a dismal prognosis due to the high rate of early recurrence even after curative surgery, selecting the most effective treatment in an individual requires preoperative assessment of the tumor characteristics, including the potential for early recurrence. The study cohort included 84 patients undergoing surgical resection of pancreatic cancer. Univariate and multivariate analyses were conducted to identify the risk factors for early recurrence within six months after curative resection...
January 1, 2018: American Surgeon
Mitsuyoshi Hirokawa, Nami Takada, Hideyuki Abe, Ayana Suzuki, Miyoko Higuchi, Akihiro Miya, Toshitetsu Hayashi, Mitsuhiro Fukushima, Akihiko Kawahara, Akira Miyauchi
We report three cases of thyroid sclerosing mucoepidermoid carcinoma with eosinophilia (SMECE), which is an extremely rare variant of mucoepidermoid carcinoma (MEC). The aims of this report were to describe the clinicopathological findings, including results from immunohistochemical and fluorescence in situ hybridization analysis of thyroid SMECE, as well as to discuss the distinction between thyroid SMECE and its salivary counterpart. The cases included a 63-year-old female, a 44-year-old male, and a 66-year-old female, with all patients presenting with Hashimoto's thyroiditis...
February 8, 2018: Endocrine Journal
Shigeharu Ueki, Junko Nishikawa, Mineyo Fukuchi, Yasunori Konno, Masahide Takeda, Yuki Moritoki, Junichi Chihara, Ayumi Omokawa, Tomoo Saga, Makoto Hirokawa
Active metabolites of vitamin A, retinoic acids (RAs), are known to play critical roles in mucosal immune responses and dramatically inhibit human eosinophil apoptosis, but the detailed mechanisms have not been elucidated. We previously screened for ICAM-1 (CD54) upregulation in RA-stimulated human eosinophils by gene microarray analysis. As ICAM-1 induction and activation were observed to have a role in maintenance of eosinophil survival, we tested the hypothesis that RAs prolong eosinophil survival through ICAM-1 outside-in signaling...
January 31, 2018: Immunology Letters
Chika Kawajiri-Manako, Emiko Sakaida, Chikako Ohwada, Toshihiro Miyamoto, Taichi Azuma, Jun Taguchi, Takehiko Mori, Yuichi Hasegawa, Tadakazu Kondo, Toshiaki Yujiri, Makoto Yoshimitsu, Kazunori Imada, Shingo Kurahashi, Kaoru Kahata, Tatsuo Ichinohe, Makoto Hirokawa, Yoshiko Atsuta, Chiaki Nakaseko
POEMS syndrome is a rare plasma cell dyscrasia presenting with polyneuropathy, λ-type M protein, VEGF elevation, and systemic manifestations. The standard treatment has not been established, but autologous stem cell transplantation (ASCT) has exhibited effectiveness in this syndrome. However, the efficacy and long-term outcomes of ASCT have not been systematically studied. To clarify the efficacy and long-term outcomes of ASCT-treated patients in Japan, we performed a multicenter retrospective study assessing the clinical course of patients registered to the Japan Society for Hematopoietic Cell Transplantation TRUMP database...
January 31, 2018: Biology of Blood and Marrow Transplantation
Hidenori Takahashi, Yasuko Suzuki, Kyoko Higuchi, Satoshi Yoshinouchi, Naoki Enomoto, Tsuyoshi Yoshida, Ryo Ohno, Mariko Mutoh, Katsuiku Hirokawa
Gallbladder carcinoma producing alpha-fetoprotein(AFP)is rare.We report a case of AFP producing carcinoma of the gallbladder with huge metastatic hepatic tumor.A 81-year-old female with a hepatitis B virus(HBV)had a fever and right hypochondralgia.Abdominal CT showed an enlarged gallbladder with gallbladder stones, a huge tumor in the right lobe of liver, and swelling paraaortic lymph nodes.Acute cholecystitis was treated by percutaneous transhepatic gallbladder drainage (PTGBD).The hepatic tumor was diagnosed as hepatocellular carcinoma for HBV carrier and the high level of AFP and PIVKA- II ...
November 2017: Gan to Kagaku Ryoho. Cancer & Chemotherapy
Rumi Hino, Noriko Motoi, Kazutoshi Toda, Aya Ebina, Keiko Yamada, Miyoko Higuchi, Mitsuyoshi Hirokawa, Yuichi Ishikawa
Hyalinizing trabecular tumor (HTT) is a rare low-grade tumor, and a prominent feature is the basement membranous stroma. We assume that such characteristic stromal findings of HTT are related to calcium deposition, and examined HTT samples by von Kossa special staining. There has been no report describing von Kossa special staining for such stroma. We collected 12 cases of HTT and 30 cases of papillary thyroid carcinoma (PTC) that had matched age, gender, tumor size, and surgical procedure characteristics as a control group...
January 24, 2018: Pathology International
Yoshihiro Inoue, Mitsuhiro Asakuma, Fumitoshi Hirokawa, Michihiro Hayashi, Tetsunosuke Shimizu, Kazuhisa Uchiyama
Introduction: Single-port access laparoscopic lateral segmentectomy (LLS) has been developed as a novel minimally invasive surgery. We have experience with this LLS technique. Aim: To report our technique and patients' postoperative course in a series of single-port access LLS performed in our department. We also examine the cosmetic outcome, safety, and utility of the procedure. Material and methods: Between February 2010 and October 2016, 54 patients who underwent single- or multiple-port laparoscopic or open lateral segmentectomy (LS) were retrospectively analyzed with respect to cosmetic outcome, safety, and utility...
December 2017: Wideochirurgia i Inne Techniki Mało Inwazyjne, Videosurgery and Other Miniinvasive Techniques
Noriko Homma, Ruyun Zhou, Muhammad Imran Naseer, Adeel G Chaudhary, Mohammed H Al-Qahtani, Nobutaka Hirokawa
Kinesin super family protein 2A (KIF2A), an ATP-dependent microtubule (MT) destabilizer, regulates cell migration, axon elongation, and pruning in the developing nervous system. KIF2A mutations have recently been identified in patients with malformed cortical development. However, postnatal KIF2A is continuously expressed in the hippocampus, in which new neurons are generated throughout an individual's life in established neuronal circuits. In this study, we investigated KIF2A function in the postnatal hippocampus by using tamoxifen-inducible Kif2a conditional knockout (Kif2a-cKO) mice...
January 9, 2018: ELife
Yuta Miyaoka, Denan Jin, Keitaro Tashiro, Shinsuke Masubuchi, Maiko Ozeki, Fumitoshi Hirokawa, Michihiro Hayashi, Shinji Takai, Kazuhisa Uchiyama
Nonalcoholic steatohepatitis (NASH), in which there is steatosis and fibrosis in the liver, is linked to metabolic syndrome and progresses to hepatic cirrhosis. In this study, a novel hamster NASH model derived from metabolic syndrome was made using hamsters. Hamsters were fed a normal or a high-fat and high-cholesterol (HFC) diet for 12 weeks. Body weight and the ratio of liver weight to body weight were significantly greater in HFC diet-fed hamsters than in normal diet-fed hamsters. Triglyceride, low-density lipoprotein cholesterol, and glucose levels in blood were significantly increased in HFC diet-fed hamsters, and blood pressure also tended to be high, suggesting that the HFC diet-fed hamsters developed metabolic syndrome...
January 1, 2018: Experimental Animals
Miho Uematsu, Ayako Nakamura, Momoko Ebashi, Katsuiku Hirokawa, Ryosuke Takahashi, Toshiki Uchihara
INTRODUCTION: Alzheimer-type neuropil threads (NTs) and neurofibrillary tangles (NFTs) are comprised of either 4 repeat (4R)-tau, 3 repeat (3R)-tau, or a mixture of both. In the hippocampus, the number of NFTs, and the proportion of 3R tau progressively increases. If this preferential accumulation of 3R tau also occurs in the brainstem, it may be fundamentally related to progression of Alzheimer pathology. METHODS: Midbrain and pontine sections of brainstems from 23 cases (Braak-NFT stages I/II: 8, III/IV: 8, and V/VI: 7) were double immunofluorolabeled for 4R and 3R tau...
January 3, 2018: Acta Neuropathologica Communications
Atsushi Kaida, Nobuhiro Iritani, Daiki Kanbayashi, Seiji P Yamamoto, Yuki Hirai, Noritaka Hakui, Ryoko Fujimori, Hiromi Mori, Hidetetsu Hirokawa, Jun Ogasawara, Hideyuki Kubo
  Measles is a highly contagious infection caused by the measles virus (MV). In this study, long-term surveillance was performed in order to survey MV prevalence. A total of 417 patients diagnosed with or suspected of having measles were tested for MV between January 2007 and December 2016 in Osaka City, Japan. Reverse transcription-polymerase chain reaction (RT-PCR)-based testing of clinical specimens showed that 54 patients (12.9%) were MV-positive. An MV epidemic occurred in 2007, in which all detected MV strains were of genotype D5, an epidemic strain in Japan at that time...
December 26, 2017: Japanese Journal of Infectious Diseases
Marion Lanier, Jason Pickens, Simone V Bigi, Erica L Bradshaw-Pierce, Alison Chambers, Zacharia S Cheruvallath, Derek Cole, Douglas R Dougan, Jacques Ermolieff, Tony Gibson, Petro Halkowycz, Aki Hirokawa, Anthony Ivetac, Christopher McBride, Joanne Miura, Evan Nunez, Mark Sabat, John Tyhonas, Haixia Wang, Xiaolun Wang, Steve Swann
[This corrects the article DOI: 10.1021/acsmedchemlett.6b00481.].
December 14, 2017: ACS Medicinal Chemistry Letters
Seitetz C Lee, Masao Daimon, Marco R Di Tullio, Shunichi Homma, Takahiro Hasegawa, Sy Han Chiou, Tomoko Nakao, Megumi Hirokawa, Yoshiko Mizuno, Yutaka Yatomi, Tsutomu Yamazaki, Issei Komuro
Aims: Left ventricular (LV) diastolic dysfunction may lead to heart failure. A high body mass index (BMI) is associated with worse LV diastolic function. However, knowledge of the longitudinal relation between changes in BMI and LV diastolic function is limited. Methods and results: We retrospectively identified 165 asymptomatic individuals (aged 60 ± 10 years, 55% male) with preserved LV ejection fraction, who underwent repeated health check-ups (median interval: 365 days) at our hospital between 2009 and 2012...
December 11, 2017: European Heart Journal Cardiovascular Imaging
Ryoji Suno, Kanako Terakado Kimura, Takanori Nakane, Keitaro Yamashita, Junmei Wang, Takaaki Fujiwara, Yasuaki Yamanaka, Dohyun Im, Shoichiro Horita, Hirokazu Tsujimoto, Maki S Tawaramoto, Takatsugu Hirokawa, Eriko Nango, Kensuke Tono, Takashi Kameshima, Takaki Hatsui, Yasumasa Joti, Makina Yabashi, Keiko Shimamoto, Masaki Yamamoto, Daniel M Rosenbaum, So Iwata, Tatsuro Shimamura, Takuya Kobayashi
Orexin peptides in the brain regulate physiological functions such as the sleep-wake cycle, and are thus drug targets for the treatment of insomnia. Using serial femtosecond crystallography and multi-crystal data collection with a synchrotron light source, we determined structures of human orexin 2 receptor in complex with the subtype-selective antagonist EMPA (N-ethyl-2-[(6-methoxy-pyridin-3-yl)-(toluene-2-sulfonyl)-amino]-N-pyridin-3-ylmethyl-acetamide) at 2.30-Å and 1.96-Å resolution. In comparison with the non-subtype-selective antagonist suvorexant, EMPA contacted fewer residues through hydrogen bonds at the orthosteric site, explaining the faster dissociation rate...
January 2, 2018: Structure
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