101
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Hasegawa M, Miura T, Kuzuya K, Inoue A, Won Ki S, Horinouchi S, Yoshida T, Kunoh T, Koseki K, Mino K, Sasaki R, Yoshida M, Mizukami T. Identification of SAP155 as the target of GEX1A (Herboxidiene), an antitumor natural product. ACS Chem Biol 2011; 6:229-33. [PMID: 21138297 DOI: 10.1021/cb100248e] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
GEX1A is a microbial product with antitumor activity. HeLa cells cultured with GEX1A accumulated p27(Kip) and its C-terminally truncated form p27*. GEX1A inhibited the pre-mRNA splicing of p27, producing p27* from the unspliced mRNA containing the first intron. p27* lacked the site required for E3 ligase-mediated proteolysis of p27, leading to its accumulation in GEX1A-treated cells. The accumulated p27* was able to bind to and inhibit the cyclin E-Cdk2 complex that causes E3 ligase-mediated degradation of p27, which probably triggers the accumulation of p27. By using a series of photoaffinity-labeling derivatives of GEX1A, we found that GEX1A targeted SAP155 protein, a subunit of SF3b responsible for pre-mRNA splicing. The linker length between the GEX1A pharmacophore and the photoreactive group was critical for detection of the GEX1A-binding protein. GEX1A serves as a novel splicing inhibitor that specifically impairs the SF3b function by binding to SAP155.
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102
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Ogasawara D, Suzuki T, Mino K, Ueda R, Khan MNA, Matsubara T, Koseki K, Hasegawa M, Sasaki R, Nakagawa H, Mizukami T, Miyata N. Synthesis and biological activity of optically active NCL-1, a lysine-specific demethylase 1 selective inhibitor. Bioorg Med Chem 2010; 19:3702-8. [PMID: 21227703 DOI: 10.1016/j.bmc.2010.12.024] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Revised: 12/02/2010] [Accepted: 12/08/2010] [Indexed: 12/16/2022]
Abstract
Optically active (1S,2R)-NCL-1 and (1R,2S)-NCL-1 were synthesized and evaluated for their lysine-specific demethylase 1 inhibitory activity and cell growth inhibitory activity. In enzyme assays, the (1S,2R)-isomer was approximately four times more potent than the (1R,2S)-isomer. In cell growth inhibition assays, the two isomers showed similar activity in HEK293 cells and SH-SY5Y cells, whereas the (1S,2R)-isomer showed approximately four times more potent activity than the (1R,2S)-isomer in HeLa cells.
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103
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Endo N, Sasaki R, Muto S. Pheromonal cross-attraction in true bugs (Heteroptera): attraction of Piezodorus hybneri (Pentatomidae) to its pheromone versus the pheromone of Riptortus pedestris (Alydidae). ENVIRONMENTAL ENTOMOLOGY 2010; 39:1973-1979. [PMID: 22182564 DOI: 10.1603/en10016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We investigated the attractiveness of a synthetic form of the pheromone of the soybean stink bug, Piezodorus hybneri (Gmelin), under field conditions, and compared it with that of (E)-2-hexenyl (E)-2-hexenoate, a pheromone component of a competitor, Riptortus pedestris (Fabricius). Many adult stink bugs were attracted to traps baited with 100 mg of the synthetic pheromone (1: 1: one mixture of β-sesquiphellandrene, (R)-15-hexadecanolide, and methyl (Z)-8-hexadecenoate), but few were attracted to 1 or 10 mg. More than twice as many females as males were attracted to this male-produced pheromone. None of the individual pheromone components (30 mg) attracted conspecifics. In summer (June-July), when field P. hybneri were not in diapause, (E)-2-hexenyl (E)-2-hexenoate was more attractive to P. hybneri than the synthetic pheromone. The sex ratio of the adults attracted to the synthetic pheromone was highly female-biased, yet almost equal numbers of both sexes were attracted to (E)-2-hexenyl (E)-2-hexenoate. Most females attracted to both attractants were mated and had mature ovaries. However, adults attracted to (E)-2-hexenyl (E)-2-hexenoate were likely to have less food in their stomach than those attracted to the synthetic pheromone. In late autumn (October-November), when the bugs were in reproductive diapause, both attractants attracted many sexually immature female and male adults that had well-developed fat body. The synthetic pheromone also attracted a large number of conspecific nymphs. These results suggest that P. hybneri pheromone and R. pedestris pheromone component, respectively, have different functions for P. hybneri. The male-produced pheromone system of P. hybneri seems to be sex-related but to have other roles.
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104
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Oshiro Y, Sasaki R, Kobayashi A, Murata S, Fukunaga K, Kondo T, Oda T, Ohkohchi N. Prognostic relevance of the lymph node ratio in surgical patients with extrahepatic cholangiocarcinoma. Eur J Surg Oncol 2010; 37:60-4. [PMID: 21094016 DOI: 10.1016/j.ejso.2010.10.011] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2010] [Revised: 09/15/2010] [Accepted: 10/26/2010] [Indexed: 02/08/2023] Open
Abstract
AIM Few studies have investigated the influence of the lymph node ratio (LNR), the ratio of the number of lymph nodes harboring metastatic cancer to the total number of lymph nodes removed, on the outcome after surgery for extrahepatic cholangiocarcinoma. This study was conducted to examine the prognostic impact of LNR in patients undergoing resection for extrahepatic cholangiocarcinoma. PATIENTS AND METHODS We retrospectively analyzed a total of 60 consecutive patients who underwent resection for extrahepatic cholangiocarcinoma. We focused on the LNR, which was classified as 0 in 34 patients, between 0 and 0.2 in 13 patients, and greater than 0.2 in 13 patients. RESULTS The overall five-year survival rates for patients with LNRs of 0, 0 to 0.2, and ≥0.2 were 44%, 10%, and 0%, respectively (p = 0.023). LNR was an independent predictive factor for estimated survival by both univariate (p = 0.016) and multivariate (p = 0.022) analyses including LNR, the sites of the primary tumors, and surgical margin as the variables. There were no statistically significant differences between patients who had less than 12 lymph nodes removed and those who had 12 or more lymph nodes removed (p = 0.484). CONCLUSION LNR was a powerful, independent predictor of estimated survival in patients undergoing surgical resection for extrahepatic cholangiocarcinoma. LNR should be considered when stratifying patients for future clinical trials.
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105
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Miyawaki D, Demizu Y, Terashima K, Mima M, Fujii O, Niwa Y, Yoshida K, Nishimura H, Sasaki R, Murakami M. Particle-Beam Radiation Therapy for Skull Base Chordomas: A Retrospective Study. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1427] [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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106
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Kunoh T, Noda T, Koseki K, Sekigawa M, Takagi M, Shin-ya K, Goshima N, Iemura SI, Natsume T, Wada SI, Mukai Y, Ohta S, Sasaki R, Mizukami T. A novel human dynactin-associated protein, dynAP, promotes activation of Akt, and ergosterol-related compounds induce dynAP-dependent apoptosis of human cancer cells. Mol Cancer Ther 2010; 9:2934-42. [PMID: 20978158 DOI: 10.1158/1535-7163.mct-10-0730] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
There are several human genes that may encode proteins whose functions remain unknown. To find clues to their functions, we used the mutant yeast defective in Mad2, a component of the spindle checkpoint complex. Phenotypes that were provoked by the expression of a human C18orf26 protein in the mutant yeast encouraged further characterization of this protein in human cells. This protein was designated dynAP (dynactin-associated protein) because of its interaction with dynactin subunits that comprised a microtubule-based motor protein complex. The dynAP is a transmembrane protein localizing to Golgi apparatus and plasma membrane in a microtubule-dependent manner. This protein was expressed in half of human cancer cell lines but barely in normal human fibroblasts tested. The SV40-transformed fibroblasts expressed dynAP. Importantly, the expression of dynAP activated Akt (also known as protein kinase B) by promoting Ser⁴⁷³ phosphorylation required for the full activation, whereas knockdown of dynAP abolished this activation. The ergosterol-related compounds identified by the yeast cell-based high-throughput screen abrogated activation of Akt and induced apoptosis in a dynAP-dependent manner. We propose a possible advantage of dynAP expression in cancer cells; the survival of cancer cells that express dynAP is supported by dynAP-induced activation of Akt, sustaining high rates of proliferation. The inactivation of dynAP by the selected compounds nullifies this advantage, and thereby, the apoptotic machinery is allowed to operate. Taken together, dynAP can be a new target for cancer therapy, and the selected chemicals are useful for developing a new class of anticancer drugs.
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107
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Hamada S, Suzuki T, Mino K, Koseki K, Oehme F, Flamme I, Ozasa H, Itoh Y, Ogasawara D, Komaarashi H, Kato A, Tsumoto H, Nakagawa H, Hasegawa M, Sasaki R, Mizukami T, Miyata N. Design, synthesis, enzyme-inhibitory activity, and effect on human cancer cells of a novel series of jumonji domain-containing protein 2 histone demethylase inhibitors. J Med Chem 2010; 53:5629-38. [PMID: 20684604 DOI: 10.1021/jm1003655] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Selective inhibitors of Jumonji domain-containing protein (JMJD) histone demethylases are candidate anticancer agents as well as potential tools for elucidating the biological functions of JMJDs. On the basis of the crystal structure of JMJD2A and a homology model of JMJD2C, we designed and prepared a series of hydroxamate analogues bearing a tertiary amine. Enzyme assays using JMJD2C, JMJD2A, and prolyl hydroxylases revealed that hydroxamate analogue 8 is a potent and selective JMJD2 inhibitor, showing 500-fold greater JMJD2C-inhibitory activity and more than 9100-fold greater JMJD2C-selectivity compared with the lead compound N-oxalylglycine 2. Compounds 17 and 18, prodrugs of compound 8, each showed synergistic growth inhibition of cancer cells in combination with an inhibitor of lysine-specific demethylase 1 (LSD1). These findings suggest that combination treatment with JMJD2 inhibitors and LSD1 inhibitors may represent a novel strategy for anticancer chemotherapy.
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108
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Yamada K, Oda T, Hashimoto S, Ohara Y, Kobayashi A, Fukunaga K, Murata S, Sasaki R, Ohkohchi N. Treatment of locally advanced pancreatic cancer with concurrent chemoradiotherapy with gemcitabine: Results from 24 patients treated from 2003-2009. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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109
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Hashimoto S, Oda T, Yamada K, Ohara Y, Kobayashi A, Fukunaga K, Murata S, Sasaki R, Ohkohchi N. Effect of continuous adjuvant chemotherapy and protracted treatment on recurrence and survival in resected pancreatic adenocarcinoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e14676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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110
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Sasaki R, Uka T. The spatial resolution of visual attention in a motion direction discrimination task. J Vis 2010. [DOI: 10.1167/6.6.587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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111
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Sekigawa M, Kunoh T, Wada SI, Mukai Y, Ohshima K, Ohta S, Goshima N, Sasaki R, Mizukami T. Comprehensive screening of human genes with inhibitory effects on yeast growth and validation of a yeast cell-based system for screening chemicals. ACTA ACUST UNITED AC 2010; 15:368-78. [PMID: 20237203 DOI: 10.1177/1087057110363822] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To evaluate yeast as a high-throughput cell-based system for screening chemicals that may lead to drug development, 10,302 full-length human cDNAs (~50% of the total cDNAs) were introduced into yeast. Approximately 5.6% (583 clones) of the cDNAs repressed the growth of yeast. Notably, ~25% of the repressive cDNAs encoded uncharacterized proteins. Small chemicals can be readily surveyed by monitoring their restorative effects on the growth of yeast. The authors focused on protein kinases because protein kinases are involved in various diseases. Among 263 protein kinase cDNAs (~50% of the total) expressed in yeast, 60 cDNAs (~23%), including c-Yes, a member of the Src tyrosine kinase family, inhibited the growth of yeast. Known inhibitors for protein kinases were examined for whether they reversed the c-Yes-induced inhibition of the yeast growth. Among 85 inhibitors tested, 6 compounds (PP2, PP1, SU6656, purvalanol, radicicol, and geldanamycin) reversed the inhibition, indicating a high specificity sufficient for validating this screening system. Human c-Yes was found to interact with Hsc82, one of the yeast chaperones. Radicicol and geldanamycin probably exerted their actions through interactions with Hsc82. These results indicate that when human proteins requiring molecular chaperones for their activities are subjected to the yeast screening system, 2 groups of chemicals may be found. The actions of one group are exerted through direct interactions with the human proteins, whereas those of the other group are mediated through interactions with chaperones.
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112
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Ueda R, Suzuki T, Mino K, Tsumoto H, Nakagawa H, Hasegawa M, Sasaki R, Mizukami T, Miyata N. Identification of cell-active lysine specific demethylase 1-selective inhibitors. J Am Chem Soc 2010; 131:17536-7. [PMID: 19950987 DOI: 10.1021/ja907055q] [Citation(s) in RCA: 157] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Lysine specific demethylase 1 (LSD1) plays a key role in the regulation of gene expression by removing the methyl groups from methylated Lys4 of histone H3 (H3K4). Here we report the identification of the first small-molecule LSD1-selective inhibitors. These inhibitors show in vivo H3K4-methylating activity and antiproliferative activity and should be useful as lead structures for anticancer drugs and as tools for studying the biological roles of LSD1.
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113
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Ueda JY, Kunoh T, Sekigawa M, Wada SI, Mukai Y, Ohta S, Sasaki R, Mizukami T, Takagi M, Shin-ya K. JBIR-14, a highly oxygenated ergostane, from Isaria sp. NBRC 104353. J Antibiot (Tokyo) 2010; 63:139-41. [PMID: 20094069 DOI: 10.1038/ja.2010.3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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114
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Wada T, Hagiwara A, Sasaki R, Sato T, Kobayashi K, Inaka A, Sakamoto T, Hagiwara Y, Inagaki T, Katsuno K, Takegawa R, Kimura A. Can follow-up procalcitonin measurements shorten the periods of antibiotic administrations for septic patients? Crit Care 2010. [PMCID: PMC2934230 DOI: 10.1186/cc8276] [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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115
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Sasaki R, Yamato M, Takagi R, Fukada K, Watanabe Y, Kojima T, Utsumi M, Okano T, Ando T. Temporary inhalation anaesthesia in experimental pigs. Lab Anim 2009; 44:69-70. [PMID: 19889817 DOI: 10.1258/la.2009.009068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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116
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Soejima T, Yoden E, Nishimura Y, Ono S, Yoshida A, Fukuda H, Fukuhara N, Sasaki R, Tsujino K, Norihisa Y. Radiation Therapy in Patients with Implanted Cardiac Pacemakers and Implantable Cardio-defibrillators: A Prospective Survey in Japan. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1141] [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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117
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Mukubou H, Tsujimura T, Sasaki R, Yoshida K, Suzuki Y, Hori Y, Ku Y. Significance of Autophagy Induced by Gemcitabine, Radiotherapy, and the Combination of Them against Pancreatic Adenocarcinoma In Vitro and In Vivo. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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118
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Sasaki R, Kawabe T, Abe E, Uchida N, Yasuda K, Uno T, Fujiwara M, Shioyama Y, Shibamoto Y, Yamada S. Multi-institutional Analysis of Solitary Extramedullary Plasmacytoma of the Head and Neck Treated with Curative Radiotherapy. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.960] [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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119
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Yoshida K, Sasaki R, Nakabayashi M, Nishimura H, Okamoto Y, Kawabe T, Hasegawa S, Otsuki N, Nibu K, Sugimura K. Treatment Outcomes of Squamous Cell Carcinoma of External Auditory Canal and Middle Ear. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.970] [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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120
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Shimizu M, Sasaki R, Miyawaki D, Nishimura H, Demizu Y, Akagi T, Suga D, Murakami M, Sugimura K, Hishikawa Y. Novel Physiological Reaction after Proton Beam Therapy in Patients with Prostate Cancer: Urinary Activation. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.792] [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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121
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Yoshida K, Nakabayashi M, Sasaki R, Nishimura H, Okamoto Y, Kawabe T, Hasegawa S, Otsuki N, Nibu K, Sugimura K. 8563 Treatment outcomes for squamous cell carcinoma of the external auditory canal and middle ear. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)71654-4] [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] Open
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122
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Sasaki R, Okamoto T, Komiya C, Uchiyama H, Ando T, Ogiuchi H. Mandibular gingival arteriovenous malformation in pregnancy. Br J Oral Maxillofac Surg 2008; 46:675-6. [DOI: 10.1016/j.bjoms.2008.03.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2008] [Indexed: 10/22/2022]
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123
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Demizu Y, Murakami M, Miyawaki D, Oda Y, Sasaki R, Hishikawa Y. Particle Therapy for Adenoid Cystic Carcinoma of the Head and Neck: A Retrospective Study. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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124
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Ikushima H, Dong L, Allen P, Cox J, Erasmus J, Mawlawi O, Mcaleer M, Zhuang Y, Sasaki R, Komaki R. Predictive Value of 18F-fluorodeoxyglucose Uptake by Positron Emission Tomography for Non-small Cell Lung Cancer Patients Treated with Radical Radiotherapy Requires Consideration of Primary Tumor Size. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1814] [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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125
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Sasaki R, Watanabe Y, Saito K, Fujii K, Ando T, Takayama Y, Miyashita T, Akizuki T. P.020 NBCCS with mutation of the PTCH gene. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)71809-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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