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1.
S Ogita M Imanaka T Takebayashi Y Nakai H Fukumasu S Matsuo M Matsumoto B Tanaka K Iwanaga 《The Annals of physiological anthropology》1990,9(2):93-98
For the purpose of determining the most reasonable lying posture for pregnant women, we investigated the lying positions of both 247 non-pregnant women and 302 pregnant women during sleep. As for the rate of each position during the entire period of observation, 33.2% of the non-pregnant women were in the supine position, 41.2% in the lateral position, 18.4% in Sims' position and 7.1% in the prone position. In the pregnant group, the rate of supine position, simple lateral position and Sims' position was 34.2%, 52.2% and 12.7%, respectively, but the rate of the prone position was limited to 0.8%. All of the gravidas assuming the prone position were at less than 16 weeks of gestation. Non-pregnant women could sleep in a variety of positions, but pregnant women could assume the prone position during sleep only in the stage when the abdomen is not yet prominent or distended. Pregnant women were restricted significantly, either consciously or unconsciously, with progress in gestation. 相似文献
2.
Ariyuki Kagaya Yosuke Uchitomi Akira Kugaya Minoru Takebayashi Ikuo Nagaoka Mitsutaro Muraoka Norio Yokota Shigeto Yamawaki 《Journal of neurochemistry》1996,66(4):1483-1488
Abstract: We investigated the rapid and slow effects of NaF on intracellular signaling systems such as Ca2+ homeostasis and cyclic GMP (cGMP) generation in rat glioma C6 cells, using the Ca2+ -sensitive dye fura-2 and cGMP enzyme immunoassay. We found that the following: (a) NaF enhanced cGMP generation in a concentration-dependent manner. This enhancement was abolished by pretreatment with 100 µ M BAPTA tetraacetoxymethyl ester or in the presence of W-7 in a concentration-dependent manner. N G -Monomethyl- l -arginine (NMMA), a competitive inhibitor of nitric oxide synthase (NOS), also inhibited the NaF-induced generation of cGMP. These results suggest that NaF-induced cGMP generation occurs via a calcium/calmodulin- and NOS-dependent pathway. (b) The basal intracellular Ca2+ concentration ([Ca2+ ]i ) was transiently greater at 1 and 3 h after pretreatment with NaF. W-7 and W-13 antagonized the increase in [Ca2+ ]i , whereas NMMA had little effect. This suggests that the NaF-induced change in basal [Ca2+ ]i was mediated by a calmodulin-dependent pathway but was independent of a NOS-sensitive pathway. (c) The serotonin (5-HT)-induced intracellular mobilization of Ca2+ was reduced by pretreating the cells with NaF. The reduction in Ca2+ mobilization was antagonized by genistein, a tyrosine kinase inhibitor. W-7, W-5, and H-8 had no effect. Results suggest that NaF differentially regulates the cGMP generation, basal [Ca2+ ]i , and 5-HT2A receptor function in C6 glioma cells. 相似文献
3.
Expression of Six Proteins Causes Reprogramming of Porcine Fibroblasts Into Induced Pluripotent Stem Cells With Both Active X Chromosomes
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Tomokazu Fukuda Tetsuya Tani Seiki Haraguchi Kenichiro Donai Nobuyoshi Nakajima Hirohide Uenishi Takahiro Eitsuka Makoto Miyagawa Sanghoun Song Manabu Onuma Yumi Hoshino Eimei Sato Arata Honda 《Journal of cellular biochemistry》2017,118(3):537-553
In this study, we created porcine‐induced pluripotent stem (iPS) cells with the expression of six reprogramming factors (Oct3/4, Klf4, Sox2, c‐Myc, Lin28, and Nanog). The resulting cells showed growth dependent on LIF (leukemia inhibitory factor) and expression of multiple stem cell markers. Furthermore, the iPS cells caused teratoma formation with three layers of differentiation and had both active X chromosomes (XaXa). Our iPS cells satisfied the both of important characteristics of stem cells: teratoma formation and activation of both X chromosomes. Injection of these iPS cells into morula stage embryos showed that these cells participate in the early stage of porcine embryogenesis. Furthermore, the RNA‐Seq analysis detected that expression levels of endogenous pluripotent related genes, NANOG, SOX2, ZFP42, OCT3/4, ESRRB, and ERAS were much higher in iPS with six factors than that with four reprogramming factors. We can conclude that the expression of six reprogramming factors enables the creation of porcine iPS cells, which is partially close to naive iPS state. J. Cell. Biochem. 118: 537–553, 2017. © 2016 Wiley Periodicals, Inc. 相似文献
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Yuusuke Tamura Kyouhei Hayashi Naoki Omori Yuji Nishiura Kana Watanabe Nobuyuki Tanaka Masahiko Fujioka Naoki Kouyama Akira Yukimasa Yukari Tanaka Takeshi Chiba Hideki Tanioka Hirohide Nambu Hideo Yukioka Hiroki Sato Takayuki Okuno 《Bioorganic & medicinal chemistry letters》2013,23(1):90-95
Optimization of HTS hit 1 for NPY Y5 receptor binding affinity, CYP450 inhibition, solubility and metabolic stability led to the identification of some orally available oxygen-linker derivatives for in vivo study. Among them, derivative 4i inhibited food intake induced by the NPY Y5 selective agonist, and chronic oral administration of 4i in DIO mice caused a dose-dependent reduction of body weight gain. 相似文献
6.
Takebayashi S Yamamoto N Yabe D Fukuda H Kojima K Ito J Honjo T 《Developmental biology》2007,307(1):165-178
Notch signaling inhibits hair cell differentiation, based on studies on mice deficient in Notch signaling-related genes and its downstream genes. However, the precise mechanisms of this inhibition are unknown because it is difficult to control the timing and duration of the suppression of Notch signaling. Here, we developed a novel in vitro culture and analysis method for mouse fetal cochleae and examined the roles of Notch signaling by its reversible inhibition through the use of Notch signaling inhibitors of gamma-secretase and TNF-alpha-converting enzyme. Notch inhibition with Notch signaling inhibitor treatment increases the number of cochlear hair cells, as observed in gene deletion experiments. We elucidated that this increase is regulated by the dichotomy between hair cells and supporting cells from common progenitors. We also propose other roles of Notch signaling in cochlear development. First, Notch signaling arrests the cell cycle of the cochlear epithelium containing putative hair cells and supporting cell progenitors because Notch inhibition with inhibitor treatment increases the number of 5-bromo-2'-deoxyuridine (BrdU)-positive cells that can differentiate into hair cells or supporting cells. Second, Notch signaling is required for the induction of Prox1-positive supporting cells. Third, Notch signaling is required for the maintenance of supporting cells. 相似文献
7.
Suzuki J Ohnishi H Wada A Hirayama T Ohno H Ueda N Yasuda H Iiri T Wada Y Futai M Mashima H 《The Journal of biological chemistry》2003,278(28):25585-25590
The Helicobacter pylori-produced cytotoxin VacA induces intracellular vacuolation. The formed vacuole is assumed to be a hybrid of late endosome and lysosome. To elucidate the molecular mechanism of VacA-induced vacuolation, we examined the participation of syntaxin 7 in the human gastric epithelial cell line AGS. Immunocytochemistry revealed that endogenous syntaxin 7 was localized to vacuoles induced by VacA. Northern and Western blotting demonstrated that VacA intoxication increased syntaxin 7 mRNA and protein expression, respectively, in a time-dependent manner. Transient transfection of dominant-negative mutant syntaxin 7, which lacks a carboxyl-terminal transmembrane domain, inhibited VacA-induced vacuolation. In contrast, transient transfection of wild-type syntaxin 7, dominant-negative mutant syntaxin 1a, or dominant-negative mutant syntaxin 4 did not alter VacA-induced vacuolation. Furthermore, under VacA treatment, neutral red dye uptake, a parameter of VacA-induced vacuolation, was inhibited in cells stably transfected with mutant syntaxin 7 but not in cells stably transfected with wild-type syntaxin 7, mutant syntaxin 1a, or mutant syntaxin 4. Sequential immunocytochemical observation confirmed that expression of mutant syntaxin 7 did not affect VacA attachment to or internalization into AGS cells. We suggest that syntaxin 7 is involved in the intracellular vacuolation induced by VacA. 相似文献
8.
Toyama H Inagaki H Matsushita K Anthony C Adachi O 《Biochimica et biophysica acta》2003,1647(1-2):372-375
The largest of the gene clusters coding for proteins involved in methanol oxidation is the cluster mxaFJGIR(S)ACKLDEHB. Disruption of most of these genes leads to lack of growth on methanol. The previous results showed that the mutant lacking MxaD grows on methanol although at a low rate. This is explained by the low rate of methanol oxidation by whole cells. The specific activity of methanol dehydrogenase (MDH) is higher in the mutant but its electron acceptor (cytochrome c(L)) is unchanged. Using the purified proteins, it was shown that the rate of interaction of MDH and cytochrome c(L) was higher in the wild-type MDH containing some MxaD proteins, which was absent in the mutant MDH. It is suggested that the gene mxaD codes for the 17-kDa periplasmic protein that directly or indirectly stimulates the interaction between MDH and cytochrome c(L); its absence leads to a lower rate of respiration with methanol and therefore a lower growth rate on this substrate. 相似文献
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