Adenosine monophosphate degradation and inosinic acid accumulation in the shrimp Penaeus japonicus   总被引：1，自引：0，他引：1  

Seki  Hiroko  Nakazato  Kaori  Hamada-Sato  Naoko 《International Aquatic Research》2017,9(1):37-52

International Aquatic Research - Shrimp muscle contains taste component compounds, such as glutamic acid and inosinic acid (IMP). When both are present, taste intensity increases by fourfold to...  相似文献   

Characterization of Aquimarina hainanensis isolated from diseased mud crab Scylla serrata larvae in a hatchery     

Yuki Midorikawa  Tomohito Shimizu  Tetsuya Sanda  Katsuyuki Hamasaki  Shigeki Dan  Mohammad Tamrin Bin Mohamad Lal  Goshi Kato  Motohiko Sano 《Journal of fish diseases》2020,43(5):541-549

Mass mortality due to necrosis signs occurred in hatchery-reared zoea stage larvae of the mud crab Scylla serrata in Okinawa, Japan, and a causative bacterium was isolated. In this study, we identified and characterized the bacterium by genome analysis, biochemical properties and pathogenicity. The bacterium was a Gram-negative, non-motile, long rod, forming yellow colonies on a marine agar plate. It grew at 20–33°C (not at 37°C) and degraded chitin and gelatin. Phylogenetic analysis of the 16S rRNA gene sequence identified the bacterium as Aquimarina hainanensis. Genome sequence data obtained from Illumina MiSeq generated 29 contigs with 3.56 Mbp in total length and a G + C content of 32.5%. The predicted 16 chitinase genes, as putative virulence factors, had certain homologies with those of genus Aquimarina. Experimental infection with the bacterium conducted on larvae of four crustacean species, brine shrimp Artemia franciscana, freshwater shrimp Caridina multidentata, swimming crab Portunus trituberculatus and mud crab S. serrata, revealed that this bacterium was highly virulent to these species. The present study suggests that the bacterium caused mass mortality in mud crab seed production was A. hainanensis and can be widely pathogenic to crustaceans.  相似文献   

Relationship between zooplankton abundance and the early marine life history of juvenile chum salmon <Emphasis Type="Italic">Oncorhynchus keta</Emphasis> in eastern Hokkaido,Japan     

Toshihiko Saito  Ikutaro Shimizu  Jiro Seki  Kazuya Nagasawa 《Fisheries Science》2009,75(2):303-316

Interannual variations in abundance, timing of outmigration from rivers, growth rate and condition of juvenile chum salmon (Oncorhynchus keta) were studied in the Nemuro Strait (eastern Hokkaido, Japan) during 1999–2002 to establish a possible relationship to zooplankton abundance. The otolith microstructure of juveniles was examined each year in late June to determine their time and size at sea entry (i.e., outmigration), and to estimate the early marine growth rates. Salmon outmigration peaked in mid- or late May, which coincided, in three of the four study years, with the peak release of juveniles into rivers within the study area. Abundance, growth rate and condition of fish were higher in 2001, when—compared to other years—smaller fish experienced higher growth rates, coinciding with greater zooplankton abundance for that year. Our results suggest that high zooplankton abundance positively influenced juvenile chum salmon growth and the condition of the fish during their early marine life despite their small size at sea entry.  相似文献   

α-Melanocyte-stimulating hormone directly increases the plasma calcitonin level and involves calcium metabolism in goldfish     

Ikari  Takahiro  Kobayashi  Yuki  Kitani  Yoichiro  Sekiguchi  Toshio  Endo  Masato  Kambegawa  Akira  Asahina  Kiyoshi  Hattori  Atsuhiko  Tabuchi  Yoshiaki  Amornsakun  Thumronk  Mizusawa  Kanta  Takahashi  Akiyoshi  Suzuki  Nobuo 《International Aquatic Research》2018,10(3):283-292

International Aquatic Research - The effects of α-melanocyte-stimulating hormone (α-MSH) on calcium metabolism were examined with goldfish. The scales on the left side of goldfish bodies...  相似文献   

Correction to: A new and simple method for measuring in situ field-saturated hydraulic conductivity using a falling-head single cylinder     

Noborio  Kosuke  Ito  Yuki  He  Hailong  Li  Min  Kojima  Yuki  Hara  Hirofumi  Mizoguchi  Masaru 《Paddy and Water Environment》2018,16(1):81-87

Paddy and Water Environment - Hydraulic properties of soil play important roles in water and temperature regimes. Measuring hydraulic properties has been studied for decades in the laboratory and...  相似文献   

Leaf‐morphology‐assisted selection for resistance to two‐spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) in carnations (Dianthus caryophyllus L)          下载免费PDF全文

Kousuke Seki 《Pest management science》2016,72(10):1926-1933

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Solute diffusion into cell walls in solution-impregnated wood under conditioning process II: effect of solution concentration on solute diffusion     

Soichi Tanaka  Masako Seki  Tsunehisa Miki  Ichinori Shigematsu  Kozo Kanayama 《Journal of Wood Science》2016,62(2):146-155

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Biological control of potato scab and antibiosis by antagonistic Streptomyces sp. WoRs-501     

Yuki O. Kobayashi  Akira Kobayashi  Masayuki Maeda  Nobutaka Someya  Shigehito Takenaka 《Journal of General Plant Pathology》2015,81(6):439-448

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Protection induced by volatile limonene against anthracnose disease in Arabidopsis thaliana     

Kayoko Fujioka  Haruko Gotoh  Taku Noumi  Ami Yoshida  Yoshiteru Noutoshi  Yoshishige Inagaki  Mikihiro Yamamoto  Yuki Ichinose  Tomonori Shiraishi  Kazuhiro Toyoda 《Journal of General Plant Pathology》2015,81(6):415-419

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MytiLec,a Mussel R-Type Lectin,Interacts with Surface Glycan Gb3 on Burkitt’s Lymphoma Cells to Trigger Apoptosis through Multiple Pathways     

Imtiaj Hasan  Shigeki Sugawara  Yuki Fujii  Yasuhiro Koide  Daiki Terada  Naoya Iimura  Toshiyuki Fujiwara  Keisuke G. Takahashi  Nobuhiko Kojima  Sultana Rajia  Sarkar M. A. Kawsar  Robert A. Kanaly  Hideho Uchiyama  Masahiro Hosono  Yukiko Ogawa  Hideaki Fujita  Jiharu Hamako  Taei Matsui  Yasuhiro Ozeki 《Marine drugs》2015,13(12):7377-7389

MytiLec; a novel lectin isolated from the Mediterranean mussel (Mytilus galloprovincialis); shows strong binding affinity to globotriose (Gb3: Galα1-4Galβ1-4Glc). MytiLec revealed β-trefoil folding as also found in the ricin B-subunit type (R-type) lectin family, although the amino acid sequences were quite different. Classification of R-type lectin family members therefore needs to be based on conformation as well as on primary structure. MytiLec specifically killed Burkitt''s lymphoma Ramos cells, which express Gb3. Fluorescein-labeling assay revealed that MytiLec was incorporated inside the cells. MytiLec treatment of Ramos cells resulted in activation of both classical MAPK/ extracellular signal-regulated kinase and extracellular signal-regulated kinase (MEK-ERK) and stress-activated (p38 kinase and JNK) Mitogen-activated protein kinases (MAPK) pathways. In the cells, MytiLec treatment triggered expression of tumor necrosis factor (TNF)-α (a ligand of death receptor-dependent apoptosis) and activation of mitochondria-controlling caspase-9 (initiator caspase) and caspase-3 (activator caspase). Experiments using the specific MEK inhibitor U0126 showed that MytiLec-induced phosphorylation of the MEK-ERK pathway up-regulated expression of the cyclin-dependent kinase inhibitor p21, leading to cell cycle arrest and TNF-α production. Activation of caspase-3 by MytiLec appeared to be regulated by multiple different pathways. Our findings, taken together, indicate that the novel R-type lectin MytiLec initiates programmed cell death of Burkitt’s lymphoma cells through multiple pathways (MAPK cascade, death receptor signaling; caspase activation) based on interaction of the lectin with Gb3-containing glycosphingolipid-enriched microdomains on the cell surface.  相似文献