Attachment and infection to MA104 cells of avian rotaviruses require the presence of sialic acid on the cell surface     

Sugiyama M  Goto K  Uemukai H  Mori Y  Ito N  Minamoto N 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(4):461-463

To determine the characters of receptors on target cells for avian rotaviruses, the receptors on MA104 cells for the pigeon rotavirus PO-13, the turkey rotaviruses Ty-1 and Ty-3, and the chicken rotavirus Ch-1 were analyzed. Pretreatment of MA104 cells with neuraminidase greatly reduced the infection by all of the four avian rotavirus strains. Binding of the cell-attachment protein, purified VP8 expressed in bacteria, of strain PO-13 to MA104 cells was also inhibited by pretreatment of cells with neuraminidase. These findings suggest that avian rotaviruses primarily utilize sialic acid-containing molecules as receptors on MA 104 cells.  相似文献   

Quality Prediction of Rice Flour by Multiple Regression Model with Instrumental Texture Parameters of Single Cooked Milled Rice Grains     

Hiroshi Okadome  Hidechika Toyoshima  Naoto Shimizu  Keitaro Suzuki  Ken'ichi Ohtsubo 《Cereal Chemistry》2005,82(4):414-419

The purpose of this study was to develop highly accurate regression models with texture parameters of cooked milled rice grains for predicting pasting properties in terms of quality index of rice flour. Two methods were adopted as the texture measurement to acquire predictors for the models. In the calibration set, all the multiple regression models by a single‐grain method exhibited a higher R² than those by a three‐grain method. Each of the former models also showed a lower SEP and a higher RPD in the validation set. The prediction performance was best for consistency (RPD = 2.4). The single‐grain method was more advantageous for the pasting prediction. These results suggest that the models based on grain texture could predict rice flour quality.  相似文献   

The effect of successive years of defoliation by the larch sawfly (Pristiphora erichsonii (Hartig)) on the foliage properties of the Japanese larch (Larix kaempferi (Lamb.) Carr.), with particular reference to the CN balance hypothesis     

Panisara Pinkantayong  Mamoru Kubo  Tamami Terada  Masanori Fujii  Shigehiro Kamoda  Ken-ichiro Muramoto  Naoto Kamata 《Journal of Forest Research》2015,20(1):104-113

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Diversities of decay resistance and n-hexane-extractive contents in seven half-sib families from plus trees in todomatsu (Abies sachalinensis)     

Yuya Takashima  Akira Tamura  Naoya Noseda  Jun Tanabe  Kazuko Makino  Futoshi Ishiguri  Naoto Habu  Kazuya Iizuka  Shinso Yokota 《Journal of Wood Science》2015,61(2):192-198

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Discoloration induced by Raffaelea quercivora isolates in Quercus serrata logs and its relation to phylogeny: a comparison among isolates with and without the Japanese oak wilt incidence including outside of Japan     

Dai Kusumoto  Hayato Masuya  Toshihide Hirao  Hideaki Goto  Keiko Hamaguchi  Wen-I Chou  Wiwat Suasa-ard  Sawai Buranapanichpan  Sopon Uraichuen  Oraphan Kern-asa  Sunisa Sanguansub  Aumporn Panmongkol  Thu Pham Quang  Sih Kahono  Heddy Julistiono  Naoto Kamata 《Journal of Forest Research》2014,19(4):404-410

Japanese oak wilt (JOW) has been prevalent in Japan since the late 1980s. Infections of the fungus, Raffaelea quercivora Kubono et Shin. Ito, which is transmitted by an ambrosia beetle [Platypus quercivorus (Murayama)], can cause JOW. Although R. quercivora, P. quercivorus, and oak trees are distributed in other Asia–Pacific countries, the incidence of JOW has not been reported outside Japan. In this study, we collected R. quercivora isolates from 5 Asian countries, including Japan, and compared their ability to induce sapwood discoloration by inoculating Q. serrata logs. The tangential widths of the discoloration in sapwoods inoculated with non-Japanese isolates were equivalent to or greater than those of the 2 Japanese isolates. This indicates that a lack of JOW incidence outside Japan is not because of the lowered ability of R. quercivora to spread discoloration compared with the Japanese isolates. Statistical analyses of the relationship between discoloration and phylogeny based on DNA sequences of actin and chitin synthase showed that the discoloration width was independent of phylogenetic relatedness among the isolates. To discuss why the occurrence of JOW has not been reported outside Japan, further studies (e.g., on host susceptibility and P. quercivorus aggression) throughout Asia are needed.  相似文献   

Characterization of Murine Pituitary-Derived Cell Lines Tpit/F1, Tpit/E and TtT/GF     

Saishu YOSHIDA  Masashi HIGUCHI  Hiroki UEHARU  Naoto NISHIMURA  Mitsuyoshi TSUDA  Hideji YAKO  Mo CHEN  Hideo MITSUISHI  Yoshiya SANO  Takako KATO  Yukio KATO 《The Journal of reproduction and development》2014,60(4):295-303

The pituitary is an important endocrine tissue of the vertebrate that produces and secretes many hormones. Accumulating data suggest that several types of cells compose the pituitary, and there is growing interest in elucidating the origin of these cell types and their roles in pituitary organogenesis. Therein, the histogenous cell line is an extremely valuable experimental tool for investigating the function of derived tissue. In this study, we compared gene expression profiles by microarray analysis and real-time PCR for murine pituitary tumor-derived non-hormone-producing cell lines TtT/GF, Tpit/F1 and Tpit/E. Several genes are characteristically expressed in each cell line: Abcg2, Nestin, Prrx1, Prrx2, CD34, Eng, Cspg4 (Ng2), S100β and nNos in TtT/GF; Cxcl12, Raldh1, Msx1 and Twist1 in Tpit/F1; and Cxadr, Sox9, Cdh1, EpCAM and Krt8 in Tpit/E. Ultimately, we came to the following conclusions: TtT/GF cells show the most differentiated state, and may have some properties of the pituitary vascular endothelial cell and/or pericyte. Tpit/F1 cells show the epithelial and mesenchymal phenotypes with stemness still in a transiting state. Tpit/E cells have a phenotype of epithelial cells and are the most immature cells in the progression of differentiation or in the initial endothelial-mesenchymal transition (EMT). Thus, these three cell lines must be useful model cell lines for investigating pituitary stem/progenitor cells as well as organogenesis.  相似文献   

Diversity and geographical distribution of indigenous soybean-nodulating bradyrhizobia in Japan     

Yuichi SAEKI  Naoto AIMI  Shoko TSUKAMOTO  Takeo YAMAKAWA  Yoshitaka NAGATOMO  Shoichiro AKAO 《Soil Science and Plant Nutrition》2006,52(4):418-426

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Recent advances toward the sustainable management of invasive Xylosandrus ambrosia beetles     

Gugliuzzo  Antonio  Biedermann  Peter H. W.  Carrillo  Daniel  Castrillo  Louela A.  Egonyu  James P.  Gallego  Diego  Haddi  Khalid  Hulcr  Jiri  Jactel  Hervé  Kajimura  Hisashi  Kamata  Naoto  Meurisse  Nicolas  Li  You  Oliver  Jason B.  Ranger  Christopher M.  Rassati  Davide  Stelinski  Lukasz L.  Sutherland  Roanne  Tropea Garzia  Giovanna  Wright  Mark G.  Biondi  Antonio 《Journal of pest science》2021,94(3):615-637

We provide an overview of both traditional and innovative control tools for management of three Xylosandrus ambrosia beetles (Coleoptera: Curculionidae: Scolytinae), invasive species with a history of damage in forests, nurseries, orchards and urban areas. Xylosandrus compactus, X. crassiusculus and X. germanus are native to Asia, and currently established in several countries around the globe. Adult females bore galleries into the plant xylem inoculating mutualistic ambrosia fungi that serve as food source for the developing progeny. Tunneling activity results in chewed wood extrusion from entry holes, sap outflow, foliage wilting followed by canopy dieback, and branch and trunk necrosis. Maintaining plant health by reducing physiological stress is the first recommendation for long-term control. Baited traps, ethanol-treated bolts, trap logs and trap trees of selected species can be used to monitor Xylosandrus species. Conventional pest control methods are mostly ineffective against Xylosandrus beetles because of the pests’ broad host range and rapid spread. Due to challenges with conventional control, more innovative control approaches are being tested, such as the optimization of the push–pull strategy based on specific attractant and repellent combinations, or the use of insecticide-treated netting. Biological control based on the release of entomopathogenic and mycoparasitic fungi, as well as the use of antagonistic bacteria, has yielded promising results. However, these technologies still require validation in real field conditions. Overall, we suggest that management efforts should primarily focus on reducing plant stress and potentially be combined with a multi-faceted approach for controlling Xylosandrus damage.

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Synergetic effects of cell immobilization in polyurethane foam and use of thermotolerant strain on degradation of mixed hydrocarbon substrate by Prototheca zopfii     

Ryohei Ueno  Shun Wada  Naoto Urano 《Fisheries Science》2006,72(5):1027-1033

ABSTRACT:   The synergetic effects of an immobilized cell system in an oleophilic polyurethane foam (PUF) and use of a thermotolerant strain on degradation of hydrocarbons by colorless green microalga Prototheca zopfii are reported. Two strains of P. zopfii , i.e. thermotolerant RND16 and non-thermotolerant ATCC30253, were immobilized in PUF to compare their abilities to biodegrade a mixed hydrocarbon substrate (MHS) containing aliphatic and polycyclic aromatic hydrocarbons (PAHs), as a function of temperature. The thermotolerant strain RND16 degraded MHS at 35°C, while ATCC30253 did not degrade hydrocarbons at temperatures higher than 30°C. Immobilization of P. zopfii in PUF resulted in shortened lag for growth-associated biodegradation of n -alkanes in MHS, the effect of which was most significant in cultures of RND16 at 25°C. Nevertheless, the decrease in the amount of degraded PAHs was caused by PUF immobilization and the level of this decrease was marked in the cultures of RND16, in which rate and extent of n -alkane degradation were higher than for ATCC30253.  相似文献   

Maternal and genetic effects on individual variation during early development in Japanese flounder <Emphasis Type="Italic">Paralichthys olivaceus</Emphasis>     

Yukinori Shimada  Takahito Shikano  Naoto Murakami  Tatsuo Tsuzaki  Tadahisa Seikai 《Fisheries Science》2007,73(2):244-249

ABSTRACT:   To investigate the changes in maternal effects during early development in Japanese flounder Paralichthys olivaceus , four-by-four factorial mating by artificial fertilization was performed to produce 16 families. Larvae and juveniles of each family were reared under common environmental conditions until completion of metamorphosis. The magnitude of maternal effects was estimated as the differences between sire and dam variance. Maternal effects were highest at hatching, and then disappeared at 30 days after hatching. During early development, larval size at hatching was largely affected by egg size, but this effect decreased as larvae grew. Estimated mean heritability during early development was nearly constant (0.14 ± 0.06 for total length and 0.10 ± 0.05 for body depth). Therefore, it is suggested that early development in Japanese flounder is affected by both maternal effect and genetic factors.  相似文献