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An extension plan of Yakushima Biosphere Reserve as a case study of consensus building of islanders
Matsuda, Hiroyuki,Yumoto, Takakazu,Okano, Takahiro,Tetsuka, Kenshi,Fujimaki, Aomi,Shioya, Katsunori The Ecological Society of Korea 2015 Journal of Ecology and Environment Vol.38 No.2
A participatory approach of local stakeholders is important to create a balance between nature protection and the sustainable use of natural resources in a nature reserve and its vicinity area. The zoning and management policy of biosphere reserves (BRs) is a good example of this idea, especially for island reserves. Yakushima was inscribed as a World Natural Heritage (WH) in 1993. Almost all of its residents did not remember that Yakushima was a BR. In addition, Yakushima has some problems in nature reserve management. Overabundance of the deer population is a critical threat to both agriculture and natural vegetation in the world heritage site. There are too many tourists visiting the WH site and Nagata-hama beach. The beach is a Ramsar site and one of the most important spawning grounds of sea turtles in the north Pacific. Now, residents and the municipality have decided to reactivate the Yakushima BR. Although the Ministry of the Environment of Japan has an initiative to manage the WH and the Ramsar site, the BR is managed by the municipality and local stakeholders. Local activities of both nature conservation and the sustainable use of natural resources are encouraged in the BR site. The islanders willingly included all areas of the island into the BR site. Scientists who have participated in the Society of Yakushimaology have played a significant role to build trust between local stakeholders and to seek feasible policies on the nature reserves. The concept of the "Yakushima Environmental Culture Village" is a good model for the extension plan of the Yakushima and Kuchinoerabujima BRs.
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김선욱,Takuya Hasegawa,Hiroyuki Yumoto,Tadashi Ishigaki,Kazuyoshi Uematsu,Kenji Toda,Mineo Sato 한양대학교 세라믹연구소 2014 Journal of Ceramic Processing Research Vol.15 No.3
Rare earth-free white emitting (Sr,Sn)(Zn,Mn)P2O7 phosphors were synthesized in a single phase form by a conventional solidstate reaction method and photoluminescent properties were characterized. These phosphors showed three broad band in emission spectra at 340, 440, and 690 nm, and the ratio of emission intensity between blue-green light and red light changes with Mn2+ content increasing because of energy transfer from Sn2+ to Mn2+. The emission color of the phosphors varied from blue-white to orange-white with the increase in the Mn2+ content and the emission color of the (Sr0.90Sn0.10)(Zn0.97Mn0.03)P2O7 phosphor was very close to white light.
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Kawami Masashi,Ojima Takamichi,Yumoto Ryoko,Takano Mikihisa 한국독성학회 2022 Toxicological Research Vol.38 No.4
Methotrexate (MTX) is widely used to treat various diseases. However, it induces adverse reactions like serious lung injury, including pulmonary fibrosis. Increasing evidence suggests that epithelial-mesenchymal transition (EMT) in injured alveolar epithelium contributes to the development of the pathophysiological state of the lung. We demonstrated that MTX induced EMT in cultured alveolar epithelial cell lines. Integrin-mediated signaling is considered a significant factor in recognizing the EMT process. However, the relationship between MTX-induced EMT and integrin family members is poorly understood. In the present study, we aimed to clarify the role of integrin in MTX-induced EMT in A549 and NCI-H1299 (H1299) cells by focusing on the integrin alpha 2 (ITGA2) subunit, selected based on our microarray analysis. MTX treatment for 72 h significantly increased the mRNA and cell surface expression of ITGA2 in both cell lines. However, this upregulation by MTX was suppressed by co-treatment with SB431542 and folic acid, which are inhibitors of MTX-induced EMT in A549 cells. The mRNA expression levels of EMT-related genes were more affected in the MTX-treated A549 cells with high ITGA2 expression than in those with low ITGA2 expression. Finally, E7820, an ITGA2 inhibitor, suppressed MTX-induced EMTrelated phenotypic changes, such as morphology and mRNA and protein expression of α-smooth muscle actin, a representative EMT marker. These findings suggest that ITGA2 may play a key role in MTX-induced EMT in alveolar epithelial cells.
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An extension plan of Yakushima Biosphere Reserve as a case study of consensus building of islanders
Hiroyuki Matsuda,Takakazu Yumoto,Takahiro Okano,Kenshi Tetsuka,Aomi Fujimaki,Katsunori Shioya 한국생태학회 2015 Journal of Ecology and Environment Vol.38 No.2
A participatory approach of local stakeholders is important to create a balance between nature protection and the sus¬tainable use of natural resources in a nature reserve and its vicinity area. The zoning and management policy of biosphere reserves (BRs) is a good example of this idea, especially for island reserves. Yakushima was inscribed as a World Natural Heritage (WH) in 1993. Almost all of its residents did not remember that Yakushima was a BR. In addition, Yakushima has some problems in nature reserve management. Overabundance of the deer population is a critical threat to both agricul¬ture and natural vegetation in the world heritage site. There are too many tourists visiting the WH site and Nagata-hama beach. The beach is a Ramsar site and one of the most important spawning grounds of sea turtles in the north Pacific. Now, residents and the municipality have decided to reactivate the Yakushima BR. Although the Ministry of the Environ-ment of Japan has an initiative to manage the WH and the Ramsar site, the BR is managed by the municipality and local stakeholders. Local activities of both nature conservation and the sustainable use of natural resources are encouraged in the BR site. The islanders willingly included all areas of the island into the BR site. Scientists who have participated in the Society of Yakushimaology have played a significant role to build trust between local stakeholders and to seek feasible policies on the nature reserves. The concept of the “Yakushima Environmental Culture Village” is a good model for the extension plan of the Yakushima and Kuchinoerabujima BRs.
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Ojima Takamichi,Kawami Masashi,Yumoto Ryoko,Takano Mikihisa 한국독성학회 2021 Toxicological Research Vol.37 No.3
Epithelial-mesenchymal transition (EMT), a biological process through which epithelial cells transdifferentiate into mesenchymal cells, is involved in several pathological events, such as cancer progression and organ fibrosis. So far, we have found that methotrexate (MTX), an anticancer drug, induced EMT in the human A549 alveolar adenocarcinoma cell line. However, the relationship between EMT and the cytotoxicity induced by MTX remains unclear. In this study, we compared the processes of MTX-induced EMT and apoptosis in A549 cells. Q-VD-Oph, a caspase inhibitor, suppressed MTX-induced apoptosis, but not the increase in mRNA expression of α-smooth muscle actin (SMA), a representative EMT marker. In addition, SB431542, an EMT inhibitor, did not inhibit MTX-induced apoptosis. By using isolated clonal cells from wild-type A549 cells, the induction of EMT and apoptosis by MTX in each clone was analyzed, and no significant correlation was observed between the MTX-induced increase in α-SMA mRNA expression and the proportion of cells undergoing apoptosis. Furthermore, the increase in the mRNA expression of α-SMA was well correlated with cyclin-dependent kinase inhibitor 1A, a cell cycle arrest marker, but not with BCL-2 binding component 3 and Fas cell surface death receptor, which are both pro-apoptotic factors, indicating that the MTX-induced EMT may be related to cell cycle arrest, but not to apoptosis. These findings suggested that different mechanisms were involved in the MTX-induced EMT and apoptosis.
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Recent Breakthroughs in Postharvest Physiology Research and Cut Flower Handling in Japan
Kazuo Ichimura,Tetsuya Yamada,Hiroko Shimizu-Yumoto 한국원예학회 2009 Horticulture, Environment, and Biotechnology Vol.50 No.6
Senescence of flower petals has been reported to be controlled by genetically programmed cell death (PCD). Based on nuclear morphology and DNA degradation, which are parameters of PCD, we can categorize petal senescence for six plants into three types. In all plants, except for Prunus yedoensis, marked DNA degradation was observed during petal senescence. In morning glory, petunia and Argyranthemum frutescens, nuclear fragmentation occurred during PCD. In contrast, chromatin fragmentation in the nuclei was observed in carnation and snapdragon flowers. However, nuclear or chromatin fragmentation was not observed in P. yedoensis. In carnation flowers, PCD associated with petal senescence was shown to be highly regulated by ethylene. Wet transport is better than dry transport for maintaining the freshness of cut flowers, but the vase life of cut flowers is not markedly longer for wet transport than dry transport. Treatment with sucrose plus antimicrobial compounds before shipping and during wet transport extended vase life of rose flowers. This treatment was shown to be effective in extending vase life in practice for the transport of cut roses from Hokkaido and Chiba Prefecture to markets in Tokyo. Pulse treatment with silver thiosulfate complex (STS), an inhibitor of ethylene action, in combination with sucrose before shipping are followed by treatment with sucrose plus antimicrobial compounds during wet transport, extended the vase life of cut Eustoma, Delphinium and snapdragon flowers. This treatment was also confirmed to be effective in practice.
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( Masaya Iwamuro ),( Masato Okuda ),( Eiichiro Yumoto ),( Seiyuu Suzuki ),( Atsuko Shirakawa ),( Katsuyoshi Takata ),( Tadashi Yoshino ),( Hiroyuki Okada ),( Kazuhide Yamamoto ) 대한간학회 2013 Gut and Liver Vol.7 No.2
The representative endoscopic features of primary intestinal follicular lymphoma are well known as small whitish polypoid nodules, but a magnified view has only been described in a few case reports. Herein, we report a case with intestinal follicular lymphoma in which magnifying endoscopy with narrow band imaging was helpful for prompt diagnosis. A 57-year-old Japanese woman underwent surveillance esophagogastroduodenoscopy. The endoscopic examination revealed confluent whitish granules in the duodenum, distinct from the nodules or polyps that are typical findings of intestinal follicular lymphoma. Magnifying endoscopy visualized whitish enlarged villi, and narrow band imaging emphasized an elongated and coiled vascular pattern. Based on these features, intestinal follicular lymphoma was highly suspected, and subsequent histological study confirmed the diagnosis. This case demonstrates that magnifying endoscopy with narrow band imaging was useful for the detection and prompt diagnosis of intestinal follicular lymphoma. The pathological features of intestinal follicular lymphoma are also discussed. (Gut Liver 2013;7:258-261)
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