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11.
Kagabu S Ohno I Tomizawa M Durkin KA Matsuura R Uchiyama D Nagae N Kumazawa S 《Journal of agricultural and food chemistry》2010,58(22):11832-11836
Bis-imidacloprid (bis-IMI) analogues with suitable alkylene spacers have plant-systemic insecticidal properties. The alkylene-tethered bis-IMI binds in a unique mode to the insect nicotinic acetylcholine receptor (nAChR) wherein the chloropyridine moieties are embraced by two distinct and distant domains. The heptamethylene spacer optimally bridges these two subsites, yet the linker itself binds in a relatively nonspecific manner. This investigation examines the hypothesis that a bis-IMI analogue with a heteroaromatic tether, which undergoes specific interaction(s) with the newly recognized receptor cavity, may enhance the potency relative to those of the alkylene-tethered derivatives. Remarkably, a novel bis-IMI with a furan-2,5-dimethylene fulcrum showed highest receptor potency and insecticidal activity among the analogues with various chemotype spacers. The nAChR structural model, simulating the binding site interactions of the furan-2,5-dimethylene-tethered bis-IMI, reveals that the furan ring is nestled in a hydrophobic pocket, consisting of three aromatic amino acids, and is stabilized via hydrogen bonding. 相似文献
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Nozomi Ytow Humitake Seki Tomomi Mizusaki Shigeaki Kojima Antonio E. Batomalaque 《Water, air, and soil pollution》1994,76(3-4):467-479
Effect of emergent vegetation on the population dynamics of phytoplankton community in Matsumi-ike Bog, a typical bog at the climax stage of limnological succession, was studied. The emergent vegetation grew until August and then withered and collapsed mainly during December and January, supplying the debris of emergent plants into the water column. Population density of the predominant phytoplankton showed sinusoidal fluctuation affected primarily by the water temperature, with various lag phases due to the function of other environmental factors. Shading by the emergent vegetation shifted the initiation of phytoplankton fluctuation earlier. This fluctuation patterns was most obvious among those phytoplankton contain chlorophyll-a and -b, but non -a and-c. The population dynamics were also compared with that of Matsumi-ike Bog at premature stages without (8 yr ago) or with littoral vegetations (3 yr ago). The population density of phytoplankton with chlorophyll-b decreased but those with chlorophyll-c increased, due to the shading effect of the emergent vegetation with the limnological succession of the bog. At the climax of succession, the dynamic state of phytoplankton community has become more stable. 相似文献
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Qiu J Saito N Noguchi M Fukui K Yoshiyama K Matsugano K Terehara N Matsui T 《Journal of agricultural and food chemistry》2011,59(11):6299-6304
Absorption and metabolism of a natural compound, 6-O-caffeoylsophorose (CS) from acylated anthocyanins in a red vinegar fermented with purple sweet potato, were clarified. The absorption of CS and conjugated CS in blood from orally administrated Sprague-Dawley rats at a dose of 400 mg/kg was investigated by electrochemical detection-high performance liquid chromatography. As a result, CS was successfully detected in rat plasma (AUC(0-6h), 108.6 ± 8.1 nmol h/mL) and was found to be an intact absorbable polyphenol. In addition, half of the absorbed CS was detected as its conjugates (AUC(0-6h), 50.7 ± 5.7 nmol h/mL) as well as caffeic and ferulic acids from CS. By a time-of-flight-mass spectrometric analysis of CS-administered plasma sample, glucuronide and methylated conjugates of CS were identified, in addition to glucuronide, methylated, or sulfate conjugates of caffeic and ferulic acids. Consequently, CS was absorbed in intact form into rat blood and partly degraded to caffeic and ferulic acids or metabolized by glucuronidation, methylation, or sulfatation. 相似文献
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Kae Shigihara Nozomi Shimonohara Bryden J. Stanley 《The Canadian veterinary journal. La revue veterinaire canadienne》2021,62(10):1089
A 10-year-old, neutered female, French bulldog was presented with a history of dysuria, hematuria, stranguria, and pollakiuria. Diagnostic tests revealed a large mass at the neck of the bladder without any evidence of metastatic disease. Total cystectomy with bilateral cutaneous ureterostomy creation was elected. Histopathology of the bladder mass revealed extraskeletal osteosarcoma, which was resected completely. Neither recurrence nor metastasis had been detected as of 65 months after surgery. Extraskeletal osteosarcomas are typically malignant and carry a poor prognosis. This is the first report of bladder osteosarcoma in a dog treated by total cystectomy and ureterocutaneostomy with excellent long-term control. 相似文献
16.
Mohamed Zahidur RAHMAN Yuichi HONDA Sayed Zahirul ISLAM Nozomi MUROGUCHI Sakae ARASE 《Journal of General Plant Pathology》2002,68(1):31-37
Farmers' fields were surveyed for a new disease on broad bean in different parts of Shimane Prefecture. The disease was found
in all surveyed fields. The fungus frequently associated with diseased broad bean leaves having the characteristic leaf spot
symptom was identified as Alternaria tenuissima, based on morphological characteristics. The initial lesion was brown, water soaked, circular to slightly irregular. Then the
lesion enlarged and became concentric. Mature leaves had coalescing necrosis surrounded by yellowing. Older leaves of the
plant were particularly affected. In a later stage of the disease, the leaves became blighted from the margin to the center
and most of the diseased plants defoliated. In severely infected fields, circular to irregularly shaped lesions also appeared
on stems and pods, and plants defoliated completely. All tested isolates were pathogenic to broad bean leaves. Different isolates
of the fungus varied in pathogenicity on different broad bean cultivars. In a comparison of symptoms of the disease and morphological
characteristics of the isolated fungus with other broad bean diseases, this disease represented a new, as yet undescribed
disease of broad bean in Japan. Therefore, we propose the name "leaf spot of broad bean" and "Soramame hanten-by?" in Japanese.
Received 12 April 2001/ Accepted in revised form 18 October 2001 相似文献
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Nozomi TAKAHASHI Eito YAMAGUCHI Yukiko KAWABATA Tomohiro KONO 《The Journal of reproduction and development》2015,61(1):7-12
The distal region of mouse chromosome 12 harbors the Dlk1–Dio3 domain, is essential for normal development and encodes maternally expressed noncoding RNAs (ncRNAs), including Gtl2 as well as paternally expressed proteins.Gtl2 works as a tumor suppressor in several types of human cancer cell lines; however, whether this reflects its function in vivo is unknown. Deleting Gtl2 from the maternal allele (Gtl2(–/+)) results in loss of expression of Gtl2 and decreased expression of downstream ncRNAs, including many miRNAs. To determine the role of ncRNAs in tumorigenesis, we induced teratomas by engrafting E6.5 embryos (wildtype or Gtl2(–/+)) under the kidney capsule of scid mice. Some teratomas derived from the Gtl2(–/+) embryos exhibited hypertrophic growth, suggesting that
ncRNAs, including Gtl2, may act as tumor suppressors in vivo. Microarray analysis of miRNAs expressed by Gtl2(–/+) teratomas revealed decreased expression of 28 miRNAs encoded by the Dlk1–Dio3 domain, low expression of embryonic stem cell-specific miRNAs and dysregulation of miRNAs involved in tumorigenesis. This study suggests that downregulation of ncRNAs in the Dlk1-Dio3 domain leads to enhanced teratoma growth and repression of stem cell markers. 相似文献
18.
Takauji SR Watanabe M Uyama R Nakagawa T Miyajima N Mochizuki M Nishimura R Sugano S Sasaki N 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2007,69(8):831-834
Protein expression and subcellular localization of E-cadherin, alpha-catenin, and beta-catenin in 8 feline mammary tumor cell lines were examined by western blot analysis and fluorescence immunocytochemistry. A low E-cadherin expression was observed in FNN-m cells. Furthermore, compared to other cell lines, two E-cadherin bands existed in FMC-p1 cells and were localized in the perinuclear region; distinct radial lines were observed in the cytoplasm. A low alpha-catenin expression was observed in FON-m cells, but there were no apparent abnormalities in its localization. In contrast, similar levels of beta-catenin expression and cytoplasmic localization were observed in all cell lines. 相似文献
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Chun-Ho PARK Sayaka KUBONIWA Ryo MURAKAMI Nozomi SHIWA Satoshi INOUE Kazunori KIMITSUKI Ma. Ricci R. GOMEZ Mark Joseph M. ESPINO Alpha Grace B. CABIC Sheila Marie C. ESPOSO Daria L. MANALO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(10):1563
The rabies virus is one of the most neurotropic of all viruses infecting mammals. During the terminal phases of infection, the virus spreads to peripheral tissues, including the skin. The external skin of the nose, called the nasal planum, is a sensory organ where numerous nerve bundles and terminal nerves are distributed. Therefore, the nasal planum is expected to serve as a postmortem diagnostic material. However, the distribution of rabies virus antigens in the nasal planum in rabid animals has not yet been studied. In this study, the nasal planum was obtained from 45 rabid dogs. In all rabid dogs, the viral antigen was detected in the peripheral nerve tissues, Merkel cells, and squamous cells. The viral antigen in the epidermis exhibited three patterns: first, a diffuse positive pattern from the basal layer to the squamous layer; second, a reticular positive pattern along the cell membrane in the squamous layer; and third, a basal layer pattern of the epidermis. In the dermis, viral antigens were detected more often in lamellated corpuscles just beneath the rete pegs. These results suggest that the nasal planum could serve as a useful alternative source for postmortem diagnosis in rabies endemic countries. 相似文献