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( Masanori Saito ),( Motomu Honjo ),( Hayato Shindo ),( Satoru Takeda ),( Sho Murakami ),( Mitsuhiko Katahira ),( Jun-ichi Takeda ) 한국농업기계학회 2018 한국농업기계학회 학술발표논문집 Vol.23 No.1
A cultivation outline of green soybeans could not set mechanical seeding technics to have difference of mulched soil temperature at any seeding season. Especially, the early cropping type of green soybeans seeding that used mulcting method to get high emergence rate on low temperature season have been high labor load to seed by manual operation. Therefore, the purpose of this study was to develop high efficiency and precision mechanical seeding technique which have ridging and mulching same time. We developed prototype seeding machine combined with up-cut rotary, mulching seeder and the molding implement. After that, we made control device to move diching device for up and down direction. We investigated the seeding accuracy and seeding depth of the prototype seeder, and evaluated the growth and yield, respectively. As a result, it is showed that the seeding accuracy is as same as manual seeding. Although the seeding depth was shallow compared to the conventional manual seeding, it can increase seeding depth than conventional seeding. However, the measured seeding depths were shallower than the set values. This is reason why was influenced of soil compression, posture of the seeding part and covered soil after seeding. The plant length at harvest time might become longer as the seeding depth got deeper. So, we considered that it is possible to do multiple simultaneous work used up-cut ridging and mulching seeder.
Masato Saito,Naoki Hirokawa,Yoko Usami,Masanori Someya,Koh-ichi Sakata 대한초음파의학회 2017 ULTRASONOGRAPHY Vol.36 No.3
Purpose: The aim of this study was to investigate the utility of echo intensity and contrast enhancement in the differential diagnosis between intraductal papillary mucinous neoplasm with an associated invasive carcinoma (IPMN-IC) and pancreatic ductal adenocarcinoma (PDAC) on ultrasonography. Methods: This study included eight and 37 patients who had pathologically confirmed IPMN-IC and PDAC, respectively, and were enrolled for a comparative analysis of the sonographic features of the tumors. In the quantitative echo intensity evaluation, the two groups were compared with respect to the difference between the tumor intensity and the pancreatic intensity (TI-PI) and between the tumor intensity and the vascular intensity (TI-VI). In the quantitative contrast enhancement evaluation, the increase in echo intensity (ΔTI) and increase in echo intensity per unit of time (slope) were compared between the groups. The echo intensity and contrast enhancement were also compared between the two groups in patients with T3-T4 disease. In addition, the correlations of the histological type, tumor size, stromal type, and T factor with echogenicity and contrast enhancement were analyzed. Results: IPMN-IC had significantly greater echo intensity and contrast enhancement than PDAC (TI-PI, P=0.004; TI-VI, P=0.001; ΔTI, P=0.012; slope, P=0.002). In T3-T4 disease, IPMN-IC also showed greater echo intensity and faster enhancement than PDAC. Echo intensity and contrast enhancement were correlated with histological type (TI-PI, P=0.003; TI-VI, P<0.001; ΔTI, P=0.007; slope, P<0.001). Conclusion: IPMN-IC and PDAC can be differentiated by the quantitative evaluation of echo intensity and contrast enhancement.
BALDUCCI-SILANO, PINA L.,SUZUKI, KOICHI,OHTA, MASANORI,SAITO, JUN,OHMORI, MASAYUKI,MONTANI, VALERIA,NAPOLITANO, GIORGIO,SHONG, MINHO,TANIGUCHI, SHIN-ICHI,PIETRARELLI, MICHELE,LAVARONI, STEFANO,MORI, A 충남대학교 생물공학연구소 1999 생물공학연구지 Vol.7 No.-
The single strand binding protein (SSBP-1) is a positive regulator of TSH receptor gene expression and binds to an element with a GXXXXG motif. The S box of the mouse major histocompatibility classⅡ gene has multiple GXXXXG motifs and can also bind SSBP-1. The S box is one of four highly conserved elements on the 5'-flanking region of classⅡ genes that are necessary for interferon-γ (IFNγ) to overcome the normally suppressed state of the gene and induce aberrant classⅡ expression. In this report we show that SSBP-1, when overexpressed in FRTL-5 thyroid cells, is a positive regulator of human leukocyte antigen (HLA)-DRα classⅡ gene expression, as is IFNγ or the classⅡ trans-activator (CIITA). This is evidenced by increased exogenous promoter activity, increased endogenous RNA levels, and increased endogenous antigen expression after transfecting full-length SSBP-1 complementary DNA together with a HLA-DRα promoter-reporter gene chimera into TSH-treated FRTL-5 thyroid cells whose endogenous SSBP-1 levels are low. IFNγ reverses the ability of TSH to decrease endogenous SSBP-1 RNA levels. Also, whereas SSBP-1 transfection does not cause any increase in IFNγ-induced exogenous promoter activity, transfection of SSBP-1 and CIITA additively increases endogenous classⅡ RNA levels to levels measured in cells treated with IFNγ. Further, competition studies show that SSBP-1 binding is necessary for formation of the double strand protein/DNA complexes that are seen in electrophoretic mobility shift assays when the classⅡ 5'-flanking region is incubated with extracts from IFNγ-treated FRTL-5 cells and that have been previously associated with IFNγ-induced aberrant classⅡ expression. These data suggest that SSBP-1 is involved in the action of IFNγ to overcome the normally suppressed state of the classⅡ gene; it functions together with CIITA, whose expression is independently increased by IFNγ. The effect of SSBP-1 as a positive regulator of classⅡ promoter activity is lost in cells maintained without TSH, in which endogenous SSBP-1 RNA levels are already high in the absence of aberrant classⅡ gene expression. These data suggest that high levels of endogenous SSBP-1 are insufficient to cause aberrant classⅡ expression, but, rather, TSH or IFNγ treatment additionally modulates the cell, albeit differently, such that transfected or endogenous SSBP-1, respectively, can express its positive regulatory activity. The effect of TSH is consistent with reports indicating that TSH enhances the ability of IFNγ to increase classⅡ gene expression despite the fact IFNγ increases endogenous SSBP-1 to only the same levels as in cells untreated with TSH. Finally, the effect of SSBP-1 as a positive regulator is lost when GXXXXG motifs, which exist on both the coding and noncoding strands of the S box, are mutated. Consistent with this, mutation and oligonucleotide competition studies show that GXXXXG motifs are necessary for either strand of the S box to bind protein/DNA complexes containing SSBP-1 in FRTL-5 cell extracts or to bind to recombinant SSBP-1. They also suggest that the SSBP-1-binding sites on either strand of the HLA-DRα S box are functionally distinct. We conclude from these data that the positive regulatory action of SSBP-1 on classⅡ gene expression involves GXXXXG motifs on each strand of the highly conserved S box of the classⅡ 5'-flanking region. As SSBP-1 is modulated by IFNγ and is involved in classⅠ and TSH receptor as well as classⅡ gene expression in FRTL-5 cells, the sum of the data supports the hypotheses that common transcription factors regulate all three genes, and their altered activities may contribute to the development of autoimmunity. (Endocrinology 139: 2300-2313, 1998)
Oral Administration of Phosphorylated Dextran Regulates Immune Response in Ovalbumin-Immunized Mice
Nagasawa, Chiho,Nishimura-Uemura, Junko,Tohno, Masanori,Shimosato, Takeshi,Kawai, Yasushi,Ikegami, Shuji,Oda, Munehiro,Saito, Tadao,Kitazawa, Haruki Asian Australasian Association of Animal Productio 2010 Animal Bioscience Vol.23 No.1
Phosphorylated dextran (P-Dex) is an acidic polysaccharide that functions as an immune adjuvant. P-Dex is known to regulate immune response by maintaining a balance between Th1 and Th2 cells in vitro, and thus may also be important in the control of allergic reactions. In the current study, we report the optimum conditions required for the efficient phosphorylation of dextran without toxicity. We found that when dextran was heated at 160${^{\circ}C}$ for 24 h in phosphate buffer (pH 5.0), the resulting P-Dex demonstrated the highest phosphorus content (6.8%). We also report that P-Dex enhances mitogenic activity in mouse splenocytes and induces expression of CD69 and CD86 on the surface of B cells and dendritic cells (DC) in vitro. Oral administration of P-Dex to ovalubmin (OVA)-immunized mice was found to reduce antigen-induced cell proliferation and suppress the expression of CD86 on Th2-inducing DC via exogenous OVA stimulation. P-Dex was also found to increase IL-10 expression in the splenocytes of treated mice. These findings suggest that oral administration of P-Dex increases immunological tolerance and improves the specificity of immunological response to specific antigens.
Foxf2 represses bone formation via Wnt2b/β-catenin signaling
Tanaka Tomoyuki,Takahashi Akira,Kobayashi Yutaka,Saito Masanori,Xiaolong Sun,Jingquan Chen,Ito Yoshiaki,Kato Tsuyoshi,Ochi Hiroki,Sato Shingo,Yoshii Toshitaka,Okawa Atsushi,Carlsson Peter,Inose Hiroyu 생화학분자생물학회 2022 Experimental and molecular medicine Vol.54 No.-
Differentiation of mesenchymal stem cells (MSCs) into osteoblasts is a critical process for proper skeletal development and acquisition/maintenance of bone mass. However, since this regulatory mechanism has not yet been fully elucidated, the treatment of severe osteoporosis and fractures is a challenge. Here, through a comprehensive analysis of gene expression during the differentiation of MSCs into osteoblasts, we show that the forkhead transcription factor Foxf2 is a crucial regulator of this process. Foxf2 expression transiently increased during MSC osteoblastic differentiation. Overexpression of Foxf2 in MSCs inhibited osteoblastic differentiation, and conversely, knockdown of Foxf2 expression promoted this process. Osteoprogenitor-specific Foxf2 knockout mice developed a high bone mass phenotype due to increased bone formation. RNA-seq analysis and molecular experiments revealed that Foxf2 regulation of bone formation is mediated by Wnt2b. Knockdown of Foxf2 in mouse femurs enhanced bone regeneration in vivo. FOXF2 expression was correlated with hip bone mineral density in postmenopausal women with low bone mass. Finally, inhibition of FOXF2 promoted osteoblastic differentiation of human MSCs. This study uncovers a critical role of Foxf2 in the differentiation of MSCs into osteoblasts and provides insight into the pathogenesis associated with bone-related diseases such as osteoporosis and nonunion after fracture
Gastric Xanthomas and Fundic Gland Polyps as Endoscopic Risk Indicators of Gastric Cancer
Kentaro Yamashita,Ryo Suzuki,Toshiyuki Kubo,Kei Onodera,Tomoya Iida,Mayuko Saito,Yoshiaki Arimura,Takao Endo,Masanori Nojima,Hiroshi Nakase 거트앤리버 소화기연관학회협의회 2019 Gut and Liver Vol.13 No.4
Background/Aims: Fundic gland polyps (FGPs), hyperplastic polyps (HPs), and xanthomas (XTs) are common benign gastric lesions that can be diagnosed by endoscopic appearance alone in most cases. The aim of this study was to evaluate associations between gastric cancer and these benign lesions. Methods: Two expert endoscopists reviewed a series of gastroscopy images. FGPs, HPs, and XTs were diagnosed by endoscopic appearance, whereas all gastric cancers were confirmed pathologically. Results: Of the 1,227 patients reviewed, 114 (9.3%) had a concurrent or past history of gastric cancer. The overall prevalences of FGPs, HPs and XTs were 9.4%, 6.3% and 14.2%, respectively. HPs and XTs coexisted in 1.6% of patients, whereas other combinations were rarer. XTs were observed in 39.3% and 11.5% of patients with and without gastric cancer, respectively (p<0.001). In contrast, no gastric cancer patients had FGPs, whereas 10.4% of patients without cancer had FGPs (p<0.001). The prevalence of HPs was similar between the two groups (8.8% and 6.0% of patients with and without cancer, respectively, p=0.29). Multivariate and Mantel-Haenszel analyses demonstrated that XTs were positively associated and FGPs were negatively associated with gastric cancer. Conclusions: XTs and FGPs might be useful as endoscopic risk indicators for monitoring gastric cancer.