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Kanda M, Shimizu D, Sugimoto H, Oya H, Hibino S, Takami H, Hashimoto R, Okamura Y, Yamada S, Fujii T, Nakayama G, Koike M, Nomoto S, Fujiwara M, Kodera Y. B-Cell Translocation Gene 1 Serves As a Novel Prognostic Indicator of Hepatocellular Carcinoma. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu334.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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102
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Miyoshi M, Fujiwara M, Aoyama-Ishikawa M, Nishiokada A, Kai M, Nishiyama Y, Maeshige N, Usami M. PP079-SUN: Oral Administration of Tributyrin Attenuates Lipopolysaccharide-Induced Intestinal Injury in Rat. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50121-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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103
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Shimizu D, Kanda M, Sugimoto H, Oya H, Takami H, Hibino S, Hashimoto R, Okamura Y, Yamada S, Fujii T, Nakayama G, Koike M, Nomoto S, Fujiwara M, Kodera Y. Identification of Intragenic Methylation in the Tusc1 Gene As a Novel Prognostic Marker of Hepatocellular Carcinoma. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu334.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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104
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Nishiokada A, Miyoshi M, Fujiwara M, Aoyama-Ishikawa M, Nishiyama Y, Kai M, Maeshige N, Takahashi M, Hamada Y, Usami Y, Arita M, Usami M. PP010-SUN: Changes of Hepatic Lipid Mediators Associated with Intake of High-Fat Diet for 12 Weeks in Endotoxemic Rats using LC-ESI-MS/MS. Clin Nutr 2014. [DOI: 10.1016/s0261-5614(14)50052-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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105
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Odawara S, Doi H, Tsujimura T, Shikata T, Suzuki H, Kosaka K, Inoue H, Tanooka M, Takada Y, Niwa Y, Fujiwara M, Kamikonya N, Hirota S. Polaprezinc Protects Intestinal Epithelium From Radiation-Induced Damage in Mice. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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106
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Matsui H, Fujiwara M, Hamada S, Shimamoto K, Nomura Y, Nakagami H, Takahashi A, Hirochika H. Plasma membrane localization is essential for Oryza sativa Pto-interacting protein 1a-mediated negative regulation of immune signaling in rice. PLANT PHYSIOLOGY 2014; 166:327-36. [PMID: 24958714 PMCID: PMC4149718 DOI: 10.1104/pp.114.243873] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Oryza sativa Pto-interacting protein 1a (OsPti1a), an ortholog of tomato (Solanum lycopersicum) SlPti1, functions as a negative regulator of innate immunity in rice (Oryza sativa). In ospti1a mutants, the activation of immune responses, including hypersensitive response-like cell death, is caused by loss of the OsPti1a protein; however, it is as yet unclear how OsPti1a suppresses immune responses. Here, we report that OsPti1a localizes to detergent-resistant membrane fractions of the plasma membrane through lipid modification of the protein's amino terminus, which is highly conserved among Pti1 orthologs in several plant species. Importantly, mislocalization of OsPti1a after deletion of its amino terminus reduced its ability to complement the mutant phenotypes, including hypersensitive response-like cell death. Furthermore, complex formation of OsPti1a depends on its amino terminus-mediated membrane localization. Liquid chromatography-tandem mass spectrometry analysis of OsPti1a complex-interacting proteins identified several defense-related proteins. Collectively, these findings indicate that appropriate complex formation by OsPti1a at the plasma membrane is required for the negative regulation of plant immune responses in rice.
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Fujiwara M, Yamamoto S, Doi H, Takada Y, Odawara S, Niwa Y, Ishikura R, Kamikonya N, Terada T, Uwa N, Sagawa K, Hirota S. Arterial chemoradiotherapy for carcinomas of the external auditory canal and middle ear. Laryngoscope 2014; 125:685-9. [DOI: 10.1002/lary.24908] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 05/22/2014] [Accepted: 08/04/2014] [Indexed: 11/11/2022]
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Koizumi K, Nakayama T, Oba H, Fujiwara M. [A case report: a patient with paralysis of the lower half of the body being diagnosed with prostate cancer and primary spinal malignant lymphoma]. HINYOKIKA KIYO. ACTA UROLOGICA JAPONICA 2014; 60:315-318. [PMID: 25142956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The patient was an 81-year-old man who visited our hospital for paralysis of the lower half of the body. He was suspected as having a spinal tumor by computed tomography and magetic resonance imaging, and also as having prostate cancer based on a high prostate specific antingen level. A prostate needle biopsy, thoracic spinal fusion and posterior decompression were performed. The patient was diagnosed as having prostate cancer and primary spinal malignant lymphoma. Hormone therapy and chemotherapy were started for the prostate cancer and primary spinal malignant lymphoma, respectively. However, the patient died of a complication from chemotherapy.
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Sako K, Yanagawa Y, Kanai T, Sato T, Seki M, Fujiwara M, Fukao Y, Yamaguchi J. Proteomic Analysis of the 26S Proteasome Reveals Its Direct Interaction with Transit Peptides of Plastid Protein Precursors for Their Degradation. J Proteome Res 2014; 13:3223-30. [DOI: 10.1021/pr401245g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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110
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Fujiwara M, Uemura T, Ebine K, Nishimori Y, Ueda T, Nakano A, Sato MH, Fukao Y. Interactomics of Qa-SNARE in Arabidopsis thaliana. PLANT & CELL PHYSIOLOGY 2014; 55:781-9. [PMID: 24556609 DOI: 10.1093/pcp/pcu038] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Membrane trafficking in plants is involved in cellular development and the adaptation to various environmental changes. SNARE (soluble N-ethylmaleimide-sensitive factor attachment receptor) proteins mediate the fusion between vesicles and organelles to facilitate transport cargo proteins in cells. To characterize further the SNARE protein networks in cells, we carried out interactome analysis of SNARE proteins using 12 transgenic Arabidopsis thaliana plants expressing green fluorescent protein (GFP)-tagged Qa-SNAREs (SYP111, SYP121, SYP122, SYP123, SYP132, SYP21, SYP22, SYP31, SYP32, SYP41, SYP42 and SYP43). Microsomal fractions were prepared from each transgenic root, and subjected to immunoprecipitation (IP) using micromagnetic beads coupled to anti-GFP antibodies. To identify Qa-SNARE-interacting proteins, all immunoprecipitated products were then subjected to mass spectrometric (IP-MS) analysis. The IP-MS data revealed not only known interactions of SNARE proteins, but also unknown interactions. The IP-MS results were next categorized by gene ontology analysis. The data revealed that categories of cellular component organization, the cytoskeleton and endosome were enriched in the SYP2, SYP3 and SYP4 groups. In contrast, transporter activity was classified specifically in the SYP132 group. We also identified a novel interaction between SYP22 and VAMP711, which was validated using co-localization analysis with confocal microscopy and IP. Additional novel SNARE-interacting proteins play roles in vesicle transport and lignin biosynthesis, and were identified as membrane microdomain-related proteins. We propose that Qa-SNARE interactomics is useful for understanding SNARE interactions across the whole cell.
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Muroi C, Fujioka M, Mishima K, Irie K, Fujimura Y, Nakano T, Fandino J, Keller E, Iwasaki K, Fujiwara M. Effect of ADAMTS-13 on cerebrovascular microthrombosis and neuronal injury after experimental subarachnoid hemorrhage. J Thromb Haemost 2014; 12:505-14. [PMID: 24476338 DOI: 10.1111/jth.12511] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2013] [Accepted: 12/17/2013] [Indexed: 11/30/2022]
Abstract
BACKGROUND Microthrombosis and reactive inflammation contribute to neuronal injury after subarachnoid hemorrhage (SAH). ADAMTS-13 cleaves von Willebrand factor multimers, and inhibits thrombus formation and, seemingly, inflammatory reactions. OBJECTIVE To investigate the effect of ADAMTS-13 in experimental SAH. METHODS A total of 100 male C57/BL6 mice were randomly assigned to four groups: sham (n = 15), SAH (n = 27), vehicle (n = 25), and ADAMTS-13 (n = 23; 100 μL per 10 g of body weight of 100 μg of ADAMTS-13 per 1 mL of 0.9% NaCl; 20 min after SAH). Neurologic performance was assessed on days 1 and 2 after SAH. Animals were killed on day 2. The amounts of subarachnoid blood, microthrombi, apoptosis and degenerative neurons were compared. The degree of neuronal inflammation and vasospasm was also compared. In five mice each (SAH and ADAMTS-13 groups), bleeding time was assessed 2 h after SAH. RESULTS Systemic administration of ADAMTS-13 achieved significant amelioration of microthrombosis and improvement in neurologic performance. ADAMTS-13 reduced the amount of apoptotic and degenerative neurons. A tendency for decreased neuronal inflammation was observed. ADAMTS-13 did not show any significant effect on vasospasm. The degree of systemic inflammation was not changed by ADAMTS-13 administration. ADAMTS-13 neither increased the amount of subarachnoid blood nor prolonged the bleeding time. CONCLUSIONS ADAMTS-13 may reduce neuronal injury after SAH by reducing microthrombosis formation and neuronal inflammation, thereby providing a new option for mitigating the severity of neuronal injury after SAH.
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Akamatsu A, Wong HL, Fujiwara M, Okuda J, Nishide K, Uno K, Imai K, Umemura K, Kawasaki T, Kawano Y, Shimamoto K. An OsCEBiP/OsCERK1-OsRacGEF1-OsRac1 module is an essential early component of chitin-induced rice immunity. Cell Host Microbe 2014; 13:465-76. [PMID: 23601108 DOI: 10.1016/j.chom.2013.03.007] [Citation(s) in RCA: 151] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 01/17/2013] [Accepted: 03/04/2013] [Indexed: 11/30/2022]
Abstract
OsCEBiP, a chitin-binding protein, and OsCERK1, a receptor-like kinase, are plasma membrane (PM) proteins that form a receptor complex essential for fungal chitin-driven immune responses in rice. The signaling events immediately following chitin perception are unclear. Investigating the spatiotemporal regulation of the rice small GTPase OsRac1, we find that chitin induces rapid activation of OsRac1 at the PM. Searching for OsRac1 interactors, we identified OsRacGEF1 as a guanine nucleotide exchange factor for OsRac1. OsRacGEF1 interacts with OsCERK1 and is activated when its C-terminal S549 is phosphorylated by the cytoplasmic domain of OsCERK1 in response to chitin. Activated OsRacGEF1 is required for chitin-driven immune responses and resistance to rice blast fungus infection. Further, a protein complex including OsCERK1 and OsRacGEF1 is transported from the endoplasmic reticulum to the PM. Collectively, our results suggest that OsCEBiP, OsCERK1, OsRacGEF1, and OsRac1 function as key components of a "defensome" critically engaged early during chitin-induced immunity.
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Kakinoki K, Okano K, Oshima M, Suto H, Kashiwagi H, Yamamoto N, Akamoto S, Fujiwara M, Yachida S, Takama T, Hagiike M, Usuki H, Kamata H, Masaki T, Suzuki Y. A novel triple secured technique for pancreatic reconstruction following pancreaticoduodenectomy for a soft pancreas. HEPATO-GASTROENTEROLOGY 2014; 61:469-474. [PMID: 24901164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND/AIMS Soft pancreases are susceptible to developing pancreatic fistula following pancreaticoduodenectomy. To reduce the incidence of pancreatic fistula after pancreaticoduodenectomy in patients with a soft pancreas, we developed a triple secured technique. In this study, we describe the details of this technique and also report on the postoperative outcomes. METHODOLOGY The triple secured technique employed an ultrasonic dissector for pancreatic transection with skeletonizing and ligating of the small pancreatic branch ducts, duct-invagination or duct-to-mucosa anastomosis for main pancreatic duct management, and, finally, four large stitches between the pancreatic stump parenchyma and the jejunal seromuscular layer to prevent minor pancreatic leakage. A total of 28 consecutive patients with a soft pancreas who underwent pancreaticoduodenectomy using our technique were included in this study. RESULTS Postopetrative complications occurred in 16 patients. Grade B pancreatic fistula developed in 6 patients. However, no grade C pancreatic fistula occurred in this series. Neither any reoperation nor in-hospital mortality was observed in this series. CONCLUSIONS Our triple secured technique after pancreaticoduodenectomy was feasible and safe, with an acceptable rate of grade B pancreatic fistula and no grade C pancreatic fistula for patients with a soft pancreas.
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114
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Kobayashi D, Iwata N, Kanda M, Tanaka C, Yamada S, Nakayama G, Fujii T, Sugimoto H, Koike M, Nomoto S, Fujiwara M, Kodera Y. Treatment Strategy against Gastric Cancer with Peritoneal Metastasis in Its Early Developing Phase. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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115
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Maekawa S, Inada N, Yasuda S, Fukao Y, Fujiwara M, Sato T, Yamaguchi J. The carbon/nitrogen regulator ARABIDOPSIS TOXICOS EN LEVADURA31 controls papilla formation in response to powdery mildew fungi penetration by interacting with SYNTAXIN OF PLANTS121 in Arabidopsis. PLANT PHYSIOLOGY 2014; 164:879-87. [PMID: 24394775 PMCID: PMC3912113 DOI: 10.1104/pp.113.230995] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Accepted: 01/02/2014] [Indexed: 05/19/2023]
Abstract
The carbon/nitrogen (C/N) balance of plants is not only required for growth and development but also plays an important role in basal immunity. However, the mechanisms that link C/N regulation and basal immunity are poorly understood. We previously demonstrated that the Arabidopsis (Arabidopsis thaliana) Arabidopsis Tóxicos en Levadura31 (ATL31) ubiquitin ligase, a regulator of the C/N response, positively regulates the defense response against bacterial pathogens. In this study, we identified the plasma membrane-localized soluble N-ethylmaleimide-sensitive fusion protein attachment protein receptor SYNTAXIN OF PLANTS121 (SYP121) as a novel ATL31 interactor. The syp121-1 loss-of-function mutant showed similar hypersensitivity to C/N stress conditions as the atl31 atl6 double mutant. SYP121 is essential for resistance to penetration by powdery mildew fungus and positively regulates the formation of cell wall appositions (papillae) at fungal entry sites. Microscopic analysis demonstrated that ATL31 was specifically localized around papillae. In addition, ATL31 overexpressors showed accelerated papilla formation, enhancing their resistance to penetration by powdery mildew fungus. Together, these data indicate that ATL31 plays an important role in connecting the C/N response with basal immunity by promoting papilla formation through its association with SYP121.
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Kohama K, Nakao A, Terashima M, Ishikawa M, Shimizu T, Harada D, Nakayama M, Yamashita H, Fujiwara M, Kotani J. Supplementation of Parenteral Nutrition with Fish Oil Attenuates LPS-induced Acute Lung Injury in Rats. J Surg Res 2014. [DOI: 10.1016/j.jss.2013.11.618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Miura H, Tanooka M, Fujiwara M, Takada Y, Doi H, Odawara S, Kosaka K, Kamikonya N, Hirota S. Predicting Delivery Error Using a DICOM-RT Plan for Volumetric Modulated Arc Therapy. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ijmpcero.2014.32013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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118
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Shimada TL, Takano Y, Shimada T, Fujiwara M, Fukao Y, Mori M, Okazaki Y, Saito K, Sasaki R, Aoki K, Hara-Nishimura I. Leaf oil body functions as a subcellular factory for the production of a phytoalexin in Arabidopsis. PLANT PHYSIOLOGY 2014; 164:105-18. [PMID: 24214535 PMCID: PMC3875792 DOI: 10.1104/pp.113.230185] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 10/28/2013] [Indexed: 05/18/2023]
Abstract
Oil bodies are intracellular structures present in the seed and leaf cells of many land plants. Seed oil bodies are known to function as storage compartments for lipids. However, the physiological function of leaf oil bodies is unknown. Here, we show that leaf oil bodies function as subcellular factories for the production of a stable phytoalexin in response to fungal infection and senescence. Proteomic analysis of oil bodies prepared from Arabidopsis (Arabidopsis thaliana) leaves identified caleosin (CLO3) and α-dioxygenase (α-DOX1). Both CLO3 and α-DOX1 were localized on the surface of oil bodies. Infection with the pathogenic fungus Colletotrichum higginsianum promoted the formation of CLO3- and α-DOX1-positive oil bodies in perilesional areas surrounding the site of infection. α-DOX1 catalyzes the reaction from α-linolenic acid (a major fatty acid component of oil bodies) to an unstable compound, 2-hydroperoxy-octadecatrienoic acid (2-HPOT). Intriguingly, a combination of α-DOX1 and CLO3 produced a stable compound, 2-hydroxy-octadecatrienoic acid (2-HOT), from α-linolenic acid. This suggests that the colocalization of α-DOX1 and CLO3 on oil bodies might prevent the degradation of unstable 2-HPOT by efficiently converting 2-HPOT into the stable compound 2-HOT. We found that 2-HOT had antifungal activity against members of the genus Colletotrichum and that infection with C. higginsianum induced 2-HOT production. These results defined 2-HOT as an Arabidopsis phytoalexin. This study provides, to our knowledge, the first evidence that leaf oil bodies produce a phytoalexin under a pathological condition, which suggests a new mechanism of plant defense.
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Miura H, Tanooka M, Inoue H, Fujiwara M, Kosaka K, Doi H, Takada Y, Odawara S, Kamikonya N, Hirota S. DICOM-RT Plan Complexity Verification for Volumetric Modulated Arc Therapy. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/ijmpcero.2014.33017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Tamaki T, Betsuyaku S, Fujiwara M, Fukao Y, Fukuda H, Sawa S. SUPPRESSOR OF LLP1 1-mediated C-terminal processing is critical for CLE19 peptide activity. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2013; 76:970-81. [PMID: 24118638 DOI: 10.1111/tpj.12349] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 10/04/2013] [Accepted: 10/08/2013] [Indexed: 05/05/2023]
Abstract
Cell-to-cell communication is essential for the coordinated development of multicellular organisms. Members of the CLAVATA3/EMBRYO-SURROUNDING REGION-RELATED (CLE) family, a group of small secretory peptides, are involved in these processes in plants. Although post-translational modifications are considered to be indispensable for their activity, the detailed mechanisms governing these modifications are not well understood. Here, we report that SUPPRESSOR OF LLP1 1 (SOL1), a putative Zn²⁺ carboxypeptidase previously isolated as a suppressor of the CLE19 over-expression phenotype, functions in C-terminal processing of the CLE19 proprotein to produce the functional CLE19 peptide. Newly isolated sol1 mutants are resistant to CLE19 over-expression, consistent with the previous report (Casamitjana-Martinez, E., Hofhuis, H.F., Xu, J., Liu, C.M., Heidstra, R. and Scheres, B. (2003) Curr. Biol. 13, 1435-1441). As expected, our experiment using synthetic CLE19 peptide revealed that the sol1 mutation does not compromise CLE signal transduction pathways per se. SOL1 possesses enzymatic activity to remove the C-terminal arginine residue of CLE19 proprotein in vitro, and SOL1-dependent cleavage of the C-terminal arginine residue is necessary for CLE19 activity in vivo. Additionally, the endosomal localization of SOL1 suggests that this processing occurs in endosomes in the secretory pathway. Thus, our data indicate the importance of C-terminal processing of CLE proproteins to ensure CLE activities.
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Hamada T, Nagasaki-Takeuchi N, Kato T, Fujiwara M, Sonobe S, Fukao Y, Hashimoto T. Purification and characterization of novel microtubule-associated proteins from Arabidopsis cell suspension cultures. PLANT PHYSIOLOGY 2013; 163:1804-16. [PMID: 24134884 PMCID: PMC3850192 DOI: 10.1104/pp.113.225607] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Plant microtubules (MTs) play essential roles in cell division, anisotropic cell expansion, and overall organ morphology. Microtubule-associated proteins (MAPs) bind to MTs and regulate their dynamics, stability, and organization. Identifying the full set of MAPs in plants would greatly enhance our understanding of how diverse MT arrays are formed and function; however, few proteomics studies have characterized plant MAPs. Using liquid chromatography-tandem mass spectrometry, we identified hundreds of proteins from MAP-enriched preparations derived from cell suspension cultures of Arabidopsis (Arabidopsis thaliana). Previously reported MAPs, MT regulators, kinesins, dynamins, peroxisome-resident enzymes, and proteins implicated in replication, transcription, and translation were highly enriched. Dozens of proteins of unknown function were identified, among which 12 were tagged with green fluorescent protein (GFP) and examined for their ability to colocalize with MTs when transiently expressed in plant cells. Six proteins did indeed colocalize with cortical MTs in planta. We further characterized one of these MAPs, designated as BASIC PROLINE-RICH PROTEIN1 (BPP1), which belongs to a seven-member family in Arabidopsis. BPP1-GFP decorated interphase and mitotic MT arrays in transgenic Arabidopsis plants. A highly basic, conserved region was responsible for the in vivo MT association. Overexpression of BPP1-GFP stabilized MTs, caused right-handed helical growth in rapidly elongating tissues, promoted the formation of transverse MT arrays, and resulted in the outgrowth of epidermal cells in light-grown hypocotyls. Our high-quality proteome database of Arabidopsis MAP-enriched preparations is a useful resource for identifying novel MT regulators and evaluating potential MT associations of proteins known to have other cellular functions.
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Doi H, Ishimaru F, Tanooka M, Inoue H, Odawara S, Takada Y, Niwa Y, Fujiwara M, Kamikonya N, Yamamoto S, Hirota S. Body mass index can affect gastrointestinal and genitourinary toxicity in patients with prostate cancer treated with external beam radiation therapy. Oncol Lett 2013; 7:209-214. [PMID: 24348850 PMCID: PMC3861581 DOI: 10.3892/ol.2013.1658] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 10/25/2013] [Indexed: 12/31/2022] Open
Abstract
The aim of the present study was to determine the impact of obesity on radiation-induced gastrointestinal (GI) and genitourinary (GU) toxicity. The cases of 54 patients with prostate cancer, treated with three-dimensional conformal radiation therapy (RT), were reviewed. For each patient, the body mass index (BMI), distance between the prostate and rectum (D) on a computerised tomography scan and the dosimetric parameters of the rectum and bladder in the planning data of RT, were analyzed. GI and GU toxicity was assessed during and following RT. The results of the patients with a BMI of <25 (lower BMI) were compared with those of the patients with a BMI of ≥25 (higher BMI). The higher BMI group exhibited significantly lower doses of V60 and V65 in the rectum than the lower BMI group. No significant differences were found in D and bladder doses between the two groups. The incidence of acute GI and GU toxicity and late GI and GU toxicity were 41.7, 19.4, 35.3 and 5.7% in the lower BMI group, respectively, and 27.8, 27.8, 5.9 and 35.3% in the higher BMI group, respectively. In addition, a significant difference was found in the incidence of late GU toxicity between the two groups. Among patients who underwent RT for prostate cancer, those with higher BMIs had a tendency to show lower incidences of GI toxicity and higher incidences of GU toxicity than patients with lower BMIs. To conclude, an increased effort must be made to reduce rectal doses in patients with lower BMIs. Conversely, increased care for GU toxicity must be provided for overweight patients.
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Doi H, Beppu N, Odawara S, Tanooka M, Takada Y, Niwa Y, Fujiwara M, Kimura F, Yanagi H, Yamanaka N, Kamikonya N, Hirota S. Neoadjuvant short-course hyperfractionated accelerated radiotherapy (SC-HART) combined with S-1 for locally advanced rectal cancer. JOURNAL OF RADIATION RESEARCH 2013; 54:1118-24. [PMID: 23658415 PMCID: PMC3823779 DOI: 10.1093/jrr/rrt058] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
The purpose of this study was to examine the safety and feasibility of a novel protocol of neoadjuvant short-course hyperfractionated accelerated radiotherapy (SC-HART) combined with S-1 for locally advanced rectal cancer. A total of 56 patients with lower rectal cancer of cT3N1M0 (Stage III b) was treated with SC-HART followed by radical surgery, and were analyzed in the present study. SC-HART was performed with a dose of 2.5 Gy twice daily, with an interval of at least 6 hours between fractions, up to a total dose of 25 Gy (25 Gy in 10 fractions for 5 days) combined with S-1 for 10 days. Radical surgery was performed within three weeks following the end of the SC-HART. The median age was 64.6 (range, 39-85) years. The median follow-up term was 16.3 (range, 2-53) months. Of the 56 patients, 53 (94.4%) had no apparent adverse events before surgery; 55 (98.2%) completed the full course of neoadjuvant therapy, while one patient stopped chemotherapy because of Grade 3 gastrointestinal toxicity (CTCAE v.3). The sphincter preservation rate was 94.6%. Downstaging was observed in 45 patients (80.4%). Adjuvant chemotherapy was administered to 43 patients (76.8%). The local control rate, disease-free survival rate and disease-specific survival rate were 100%, 91.1% and 100%, respectively. To conclude, SC-HART combined with S-1 for locally advanced rectal cancer was well tolerated and produced good short-term outcomes. SC-HART therefore appeared to have a good feasibility for use in further clinical trials.
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Yoshizawa J, Shirozaki T, Inoue K, Maruyama A, Karasawa F, Nakayama A, Takeuchi N, Ito N, Fujiwara M. [A case of advanced signet ring cell carcinoma of the appendix that responded to S-1 and docetaxel]. NIHON SHOKAKIBYO GAKKAI ZASSHI = THE JAPANESE JOURNAL OF GASTRO-ENTEROLOGY 2013; 110:1934-1942. [PMID: 24189822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A 68-year-old man was admitted to our hospital after testing positive in a fecal occult blood test. He was subsequently diagnosed with advanced signet ring cell carcinoma of the appendix with disseminated peritoneal disease and ascites. Weekly chemotherapy with S-1 was commenced, and after three courses, the tumor shrunk in size and the ascites decreased. Two more courses were administered;however, disease progression was noted because of increasing ascites. The chemotherapy regimen was changed to weekly docetaxel, and after two courses, further tumor shrinkage and a decrease in ascites were noted. The disease course of this patient suggests that S-1 and docetaxel were effective against signet ring cell carcinoma of the appendix. Here we report this case and discuss the relevant literature.
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Tanooka M, Doi H, Miura H, Inoue H, Niwa Y, Takada Y, Fujiwara M, Sakai T, Sakamoto K, Kamikonya N, Hirota S. Three-dimensional radiochromic film dosimetry for volumetric modulated arc therapy using a spiral water phantom. JOURNAL OF RADIATION RESEARCH 2013; 54:1153-1159. [PMID: 23685667 PMCID: PMC3823780 DOI: 10.1093/jrr/rrt059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Revised: 04/11/2013] [Accepted: 04/11/2013] [Indexed: 06/02/2023]
Abstract
We validated 3D radiochromic film dosimetry for volumetric modulated arc therapy (VMAT) using a newly developed spiral water phantom. The phantom consists of a main body and an insert box, each of which has an acrylic wall thickness of 3 mm and is filled with water. The insert box includes a spiral film box used for dose-distribution measurement, and a film holder for positioning a radiochromic film. The film holder has two parallel walls whose facing inner surfaces are equipped with spiral grooves in a mirrored configuration. The film is inserted into the spiral grooves by its side edges and runs along them to be positioned on a spiral plane. Dose calculation was performed by applying clinical VMAT plans to the spiral water phantom using a commercial Monte Carlo-based treatment-planning system, Monaco, whereas dose was measured by delivering the VMAT beams to the phantom. The calculated dose distributions were resampled on the spiral plane, and the dose distributions recorded on the film were scanned. Comparisons between the calculated and measured dose distributions yielded an average gamma-index pass rate of 87.0% (range, 91.2-84.6%) in nine prostate VMAT plans under 3 mm/3% criteria with a dose-calculation grid size of 2 mm. The pass rates were increased beyond 90% (average, 91.1%; range, 90.1-92.0%) when the dose-calculation grid size was decreased to 1 mm. We have confirmed that 3D radiochromic film dosimetry using the spiral water phantom is a simple and cost-effective approach to VMAT dose verification.
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