26
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Sasaki R, Lin C, Ho D, Ando T, Chen Y. Computed tomography evaluation with iohexol oral rinse in obstructive sleep apnoea. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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27
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Sasaki R, Watanabe Y, Matsumine H, Ando T. Experimental miniature swine for facial nerve reconstructive research using dental pulp cells. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Joko Y, Sasaki R, Shintani K. Dynamic encapsulation of corannulene molecules into a single-walled carbon nanotube. Phys Chem Chem Phys 2017; 19:27704-27715. [DOI: 10.1039/c7cp05542k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Corannulene molecules dynamically encapsulated into a single-walled carbon nanotube form an ordered stack or a partially ordered stack where concave–concave corannulene dimers are the structural motif.
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29
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Sasaki R, Shintani K. Hardness of Pillared-Graphene Nanostructures via Indentation Simulation. ACTA ACUST UNITED AC 2016. [DOI: 10.1557/adv.2016.634] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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30
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Arakane F, Tanaka Y, Murakami N, Matsuoka T, Idegami T, Yoshimatsu K, Sasaki R. Relations of Pelvic Endometriosis and Ileal Endometriosis: Report of Two Cases. J Minim Invasive Gynecol 2016. [DOI: 10.1016/j.jmig.2016.08.626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Yoshida K, Miyawaki D, Nishikawa R, Akasaka H, Matsuo Y, Omoteda M, Kyotani K, Satoh H, Osuga S, Shimizu Y, Ebina Y, Takahashi S, Sasaki R. Comparison of Dosimetric Parameters in the Treatment Planning of MRI-Based Intracavitary Image Guided Adaptive Brachytherapy With and Without Optimization Combined With EBRT Using Central Shield. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2016.06.1440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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32
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Sasaki R, Cheung YC, Chan EC, Lin CH, Chen YR. Iohexol oral rinse to differentiate the palatoglossal surfaces in computed tomography of patients with obstructive sleep apnoea. Br J Oral Maxillofac Surg 2016; 55:207-208. [PMID: 27481534 DOI: 10.1016/j.bjoms.2016.07.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/14/2016] [Indexed: 11/20/2022]
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33
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Nakayama M, Munetomo Y, Ogata T, Uehara K, Tsudou S, Nishimura H, Mayahara H, Sasaki R. SU-F-T-293: Experimental Comparisons of Ionization Chambers with Different Volumes for CyberKnife Delivery Quality Assurance. Med Phys 2016. [DOI: 10.1118/1.4956478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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34
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Kakizawa T, Mizukami T, Itoh Y, Hasegawa M, Sasaki R, Suzuki T. Evaluation of phenylcyclopropylamine compounds by enzymatic assay of lysine-specific demethylase 2 in the presence of NPAC peptide. Bioorg Med Chem Lett 2016; 26:1193-5. [PMID: 26794039 DOI: 10.1016/j.bmcl.2016.01.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 01/06/2016] [Accepted: 01/14/2016] [Indexed: 11/20/2022]
Abstract
Lysine-specific demethylase 2 (LSD2) demethylates mono- and dimethylated Lys-4 of histone H3 (H3K4me1 and H3K4me2). NPAC protein is known to interact with LSD2 and promote its H3K4 demethylase activity. In this study, we established a demethylation assay system that utilizes recombinant LSD2 in the presence of a synthetic NPAC peptide. Several phenylcyclopropylamine (PCPA)-based inhibitors were examined for their LSD2 inhibitory activity in the LSD2 enzymatic assay with the NPAC peptide. The assay results showed that the PCPA derivatives, including NCD41, selectively inhibited LSD1 in preference to LSD2.
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Miyawaki D, Mukumoto N, Ejima Y, Yoshida K, Ishihara T, Kiyota N, Saito M, Otsuki N, Nibu K, Sasaki R. Radiation-Induced Hypothyroidism in Squamous Cell Carcinoma of the Head and Neck: A Dose-Volume Histogram Analysis. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.1404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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36
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Ishihara T, Yamada K, Harada A, Isogai K, Miyawaki D, Yoshida K, Ejima Y, Sasaki R. Hypofractionated Stereotactic Radiation Therapy Compared With Stereotactic Radiosurgery for Brain Metastases From Lung Cancer: Experience at a Single-Institution. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.723] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Miyawaki D, Mukumoto N, Ejima Y, Yoshida K, Ishihara T, Kiyota N, Saito M, Otsuki N, Nibu K, Sasaki R. 2842 Radiation induced hypothyroidism in squamous cell carcinoma of the head and neck: A dose-volume histogram analysis. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31582-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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38
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Kunoh T, Wang W, Kobayashi H, Matsuzaki D, Togo Y, Tokuyama M, Hosoi M, Koseki K, Wada SI, Nagai N, Nakamura T, Nomura S, Hasegawa M, Sasaki R, Mizukami T. Human Dynactin-Associated Protein Transforms NIH3T3 Cells to Generate Highly Vascularized Tumors with Weak Cell-Cell Interaction. PLoS One 2015; 10:e0135836. [PMID: 26284361 PMCID: PMC4540312 DOI: 10.1371/journal.pone.0135836] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 07/24/2015] [Indexed: 11/19/2022] Open
Abstract
Human dynactin-associated protein (dynAP) is a transmembrane protein that promotes AktSer473 phosphorylation. Here, we report the oncogenic properties of dynAP. In contrast to control NIH3T3 cells expressing LacZ (NIH3T3LacZ), NIH3T3dynAP cells vigorously formed foci in two-dimensional culture, colonies on soft agar, and spheroids in anchorage-deficient three-dimensional culture. NIH3T3dynAP cells injected into nude mice produced tumors with abundant blood vessels and weak cell—cell contacts. Expression of dynAP elevated the level of rictor (an essential subunit of mTORC2) and promoted phosphorylation of FOXO3aSer253. FOXO3a is a transcriptional factor that stimulates expression of pro-apoptotic genes and phosphorylation of FOXO3a abrogates its function, resulting in promoted cell survival. Knockdown of rictor in NIH3T3dynAP cells reduced AktSer473 phosphorylation and formation of foci, colony in soft agar and spheroid, indicating that dynAP-induced activation of the mTORC2/AktSer473 pathway for cell survival contributes to cell transformation. E-cadherin and its mRNA were markedly reduced upon expression of dynAP, giving rise to cells with higher motility, which may be responsible for the weak cell-cell adhesion in tumors. Thus, dynAP could be a new oncoprotein and a target for cancer therapy.
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Hayakawa Y, Matsuno M, Tanaka M, Wada A, Kitamura K, Takei O, Sasaki R, Mizukami T, Hasegawa M. Complementary DNA display selection of high-affinity peptides binding the vacuolating toxin (VacA) of Helicobacter pylori. J Pept Sci 2015; 21:710-6. [PMID: 26152929 DOI: 10.1002/psc.2795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2015] [Revised: 05/24/2015] [Accepted: 05/27/2015] [Indexed: 11/06/2022]
Abstract
Artificial peptides designed for molecular recognition of a bacterial toxin have been developed. Vacuolating cytotoxin A protein (VacA) is a major virulence factor of Helicobacter pylori, a gram-negative microaerophilic bacterium inhabiting the upper gastrointestinal tract, particularly the stomach. This study attempted to identify specific peptide sequences with high affinity for VacA using systematic directed evolution in vitro, a cDNA display method. A surface plasmon resonance-based biosensor and fluorescence correlation spectroscopy to examine binding of peptides with VacA identified a peptide (GRVNQRL) with high affinity. Cyclization of the peptide by attaching cysteine residues to both termini improved its binding affinity to VacA, with a dissociation constant (Kd ) of 58 nm. This study describes a new strategy for the development of artificial functional peptides, which are promising materials in biochemical analyses and medical applications.
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Itoh Y, Sawada H, Suzuki M, Tojo T, Sasaki R, Hasegawa M, Mizukami T, Suzuki T. Identification of Jumonji AT-Rich Interactive Domain 1A Inhibitors and Their Effect on Cancer Cells. ACS Med Chem Lett 2015; 6:665-70. [PMID: 26101571 DOI: 10.1021/acsmedchemlett.5b00083] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Accepted: 04/23/2015] [Indexed: 02/06/2023] Open
Abstract
Jumonji AT-rich interactive domain 1A (JARID1A), one of the jumonji C domain-containing histone demethylase (JHDM) family members, plays key roles in cancer cell proliferation and development of drug tolerance. Therefore, selective JARID1A inhibitors are potential anticancer agents. In this study, we searched for cell-active JARID1A inhibitors by screening hydroxamate compounds in our in-house library and the structural optimization based on docking study of the hit-compound to a homology model of JARID1A. As a result, we identified compound 6j, which selectively inhibits JARID1A over three other JHDM family members. Compound 7j, a prodrug form of compound 6j, induced a selective increase in the level of trimethylation of histone H3 lysine 4, a substrate of JARID1A. Furthermore, compound 7j synergistically enhanced A549 human lung cancer cell growth inhibition induced by vorinostat, a histone deacetylase inhibitor. These findings support the idea that JARID1A inhibitors have potential as anticancer agents.
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Uehara K, Ogata T, Nakayama M, Shinji T, Nishimura H, Masutani T, Ishihara T, Ejima Y, Sasaki R. SU-E-T-145: Beam Characteristics of Flattening Filter Free Beams Including Low Dose Rate Setting. Med Phys 2015. [DOI: 10.1118/1.4924507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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42
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Uchiyama H, Ito T, Sasaki R, Kozuka H. Preparation of metal oxide thin films from organic-additive-free aqueous solutions by low-speed dip-coating. RSC Adv 2015. [DOI: 10.1039/c4ra16810k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Transparent, crack-free SnO2 and TiO2 precursor films were obtained from organic-additive-free aqueous solutions by low-speed dip-coating. The precursor films were crystallized to SnO2 and TiO2 by the heat treatment at 700 °C for 10 min in air.
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Inagaki T, Kimura A, Hagiwara A, Sasaki R, Kobayashi K, Inaka A, Makishi G. Clinical decision rule for cervical magnetic resonance imaging in suspected cervical spinal cord injury without bony injury is useful in predicting severity of cervical stenosis. Crit Care 2015. [PMCID: PMC4470648 DOI: 10.1186/cc14395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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44
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Harada A, Sasaki R, Miyawaki D, Yoshida K, Nishimura H, Ejima Y, Kitajima K, Saito M, Otsuki N, Nibu KI. Treatment outcomes of the patients with early glottic cancer treated with initial radiotherapy and salvaged by conservative surgery. Jpn J Clin Oncol 2014; 45:248-55. [DOI: 10.1093/jjco/hyu203] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Sasaki R, Matsumine H, Watanabe Y, Yamato M, Ando T. Surgical procedure of extracting teeth for obtaining dental pulp for regenerative medicine in swine. Lab Anim 2014; 49:172-6. [PMID: 25448868 DOI: 10.1177/0023677214560002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Dental pulp is a potential source of cells that can be used in cell replacement therapy for various nerve disorders, including stroke, spinal cord injury, and peripheral nerve defect. However, the validation of an animal model closely related to humans is needed in translational research. The miniature pig is a suitable experimental model in maxillofacial surgery, because its anatomical structure and size are similar to those of humans. However, the swine tooth is extremely long. The routine closed extraction procedure for harvesting dental pulp tissue causes root fracture. This report describes the details of a surgical procedure for tooth extraction. Four healthy 7-8-month-old male NIBS miniature pigs were used. Two mandibular deciduous right incisors (Di1 and Di2) were extracted in order to obtain dental pulp tissue. Gingival envelope incision with vertical-releasing incision was performed, and a full-thickness mucoperiosteal flap was made. The buccal alveolar bone was exposed and removed by osteotomy. Di1 and Di2 were extracted. Dental pulp tissue was obtained from these extracted teeth by splitting hard tissue. In this procedure, 9.8 ± 2.5 × 10(5) cells were obtained from the mandibular Di1 and Di2 (n = 4).
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Takeuchi M, Yoshikawa M, Sasaki R, Chiba H. Purification and Characterization of UDP-N-Acetylgalactosamine: κ-Casein PolypeptideN-Acetylgalactosaminyltransferase from Mammary Gland of Lactating Cow. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1985.10866844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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47
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Sasaki R, Sugimoto E, Chiba H. Reversible Dissociation of Crystalline Yeast Phosphoglyceric Acid Mutase in Alkali. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1970.10859578] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Sasaki R, Ohnota H, Yanagawa SI, Chiba H. Dietary Protein-induced Changes of the Erythropoietin Level in Rat Serum. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1985.10867148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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49
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Chiba H, Sugimoto E, Sasaki R, Hirose M. Kinetic Studies on Crystalline Yeast Phosphoglyceric Acid Mutase. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1970.10859644] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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50
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Sasaki R, Ikura K, Katsura S, Chiba H. Regulation of Human Erythrocyte AMP Deaminase by ATP and 2,3-Bisphosphoglycerate. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/00021369.1976.10862294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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