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31.
Rei NAKANO Kazuya EDAMURA Tomohiro NAKAYAMA Kenji TESHIMA Kazushi ASANO Takanori NARITA Ken OKABAYASHI Hiroshi SUGIYA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(1):27-35
We investigated the in
vitro differentiation of canine bone marrow stromal cells (BMSCs) into voltage-
and glutamate-responsive neuron-like cells. BMSCs were obtained from the bone marrow of
healthy beagle dogs. Canine BMSCs were incubated with the basal medium for neurons
containing recombinant human basic fibroblast growth factor (bFGF; 100
ng/ml). The viability of the bFGF-treated cells was
assessed by a trypan blue exclusion assay, and the morphology was monitored. Real-time
RT-PCR was performed to evaluate mRNA expression of neuronal, neural stem cell and glial
markers. Western blotting and immunocytochemical analysis for the neuronal markers were
performed to evaluate the protein expression and localization. The Ca2+
mobilization of the cells was evaluated using the Ca2+ indicator Fluo3 to
monitor Ca2+ influx. To investigate the mechanism of bFGF-induced neuronal
differentiation, the fibroblast growth factor receptor inhibitor, the phosphoinositide
3-kinase inhibitor or the Akt inhibitor was tested. The bFGF treatment resulted in the
maintenance of the viability of canine BMSCs for 10 days, in the expression of neuronal
marker mRNAs and proteins and in the manifestation of neuron-like morphology. Furthermore,
in the bFGF-treated BMSCs, a high concentration of KCl and L-glutamate induced an increase
in intracellular Ca2+ levels. Each inhibitor significantly attenuated the
bFGF-induced increase in neuronal marker mRNA expression. These results suggest that bFGF
contributes to the differentiation of canine BMSCs into voltage- and glutamate-responsive
neuron-like cells and may lead to the development of new cell-based treatments for
neuronal diseases. 相似文献
32.
Kazuyuki SUZUKI Toshio SHIMAMORI Ayano SATO Kenji TSUKANO Masakazu TSUCHIYA Jeffrey LAKRITZ 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(8):977-979
The aim of the present study was to compare the ability of the commercially available portable test system (PTSTM) to detect endotoxin activity in bovine serum, with that of the traditional LAL-kinetic turbidimetric (KT) and chromogenic (KC) assays. Prior to testing, serum samples, which were obtained from endotoxin-challenged cattle, were diluted 1:20 in endotoxin-free water and heated to 80°C for 10 min. The performance of the PTSTM was not significantly different from that of the traditional LAL-based assays. The results using PTSTM correlated with those using KT (r2=0.963, P<0.001) or KC assays (r2=0.982, P<0.001). Based on these findings, the PTSTM could be applied as a simplified system to assess endotoxin activity in bovine serum. 相似文献
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34.
Hiroshi ISEKI Michihiro TAKAGI Kenji KAWASHIMA Tomoyuki SHIBAHARA Yoshiko KURODA Hiroshi TSUNEMITSU Makoto YAMAKAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(12):1663-1666
To clarify the pathogenicity of Japanese type 1 porcine reproductive and respiratory
syndrome virus (PRRSV) isolate in experimentally infected pigs, we evaluated clinical
signs and monitored viremia for 21 days post-inoculation (dpi). Lungs were mottled, tanned
and reddish in appearance; had lesions predominantly in the cranial, middle and accessory
lobes; and failed to collapse at 10 dpi. Although microscopic lesions of lungs were
reproduced using the Japanese emerging type 1 PRRSV isolate under experimental conditions,
no significant differences were noted between the challenge and control groups regarding
mean rectal temperature and daily weight gain. These results provide useful insights into
the limited pathogenicity of single infection with the Japanese type 1 PRRSV isolate in
piglets, which differ from findings in reported field cases. 相似文献
35.
Satoshi KAMBAYASHI Masaya IGASE Kosuke KOBAYASHI Ayana KIMURA Takako SHIMOKAWA MIYAMA Kenji BABA Shunsuke NOGUCHI Takuya MIZUNO Masaru OKUDA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1405-1412
Hypoxic conditions in various cancers are believed to relate with their
malignancy, and hypoxia inducible factor-1α (HIF-1α) has been shown to be a major
regulator of the response to low oxygen. In this study, we examined HIF-1α expression in
canine lymphoma using cell lines and clinical samples and found that these cells expressed
HIF-1α. Moreover, the HIF-1α inhibitors, echinomycin, YC-1 and 2-methoxyestradiol,
suppressed the proliferation of canine lymphoma cell lines. In a xenograft model using
NOD/scid mice, echinomycin treatment resulted in a dose-dependent regression of the tumor.
Our results suggest that HIF-1α contributes to the proliferation and/or survival of canine
lymphoma cells. Therefore, HIF-1α inhibitors may be potential agents to treat canine
lymphoma. 相似文献
36.
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38.
Nakamura Y Yoshimoto M Murata Y Shimoishi Y Asai Y Park EY Sato K Nakamura Y 《Journal of agricultural and food chemistry》2007,55(11):4407-4413
In the present study, papaya (Carica papaya) seed and edible pulp were carefully separated and then the contents of benzyl isothiocyanate and the corresponding glucosinolate (benzyl glucosinolate, glucotropaeolin) quantified in each part. The papaya seed with myrosinase inactivation contained >1 mmol of benzyl glucosinolate in 100 g of fresh seed. This content is equivalent to that of Karami daikon (the hottest Japanese white radish) or that of cress. The papaya seed extract also showed a very high activity of myrosinase and, without myrosinase inactivation, produced 460 micromol of benzyl isothiocyanate in 100 g of seed. In contrast, papaya pulp contained an undetectable amount of benzyl glucosinolate and showed no significant myrosinase activity. The n-hexane extract of the papaya seed homogenate was highly effective in inhibiting superoxide generation and apoptosis induction in HL-60 cells, the activities of which are comparable to those of authentic benzyl isothiocyanate. 相似文献
39.
Matsui K Ishii M Sasaki M Rabinowitch HD Ben-Oliel G 《Journal of agricultural and food chemistry》2007,55(10):4080-4086
Carbon 6 (C6)-aldehydes formed by fatty acid 13-hydroperoxide lyase (13HPL) specific to fatty acid 13-hydroperoxides (13-HPO) are important flavor constituents in fresh tomato fruits. C9-aldehydes are usually formed by 9/13HPL showing dual specificity to 9- and 13-HPOs and are scarcely found in tomato fruits. Mature red fruits of one of the introgression lines, IL1-4, generated by hybridization of a cultivated tomato (Solanum lycopersicon) to its wild relative Solanum pennellii, form high amounts of C9-aldehydes upon homogenization. The IL1-4 fruits showed high 9/13HPL activity. One of the genes isolated from IL1-4 showed a high similarity to plant 9/13HPLs. Recombinant proteins expressed in Escherichia coli showed 9/13HPL activity. Cleaved amplified polymorphic sequence analyses indicated that the gene was specific to IL1-4 and S. pennellii. S. lycopersicon had a gene having high similarity to the S. pennellii gene. It was absent in IL1-4. Among the differences of amino acid residues found between the two genes, a Cys to Ser exchange may be responsible for the inactivation of resultant protein product of S. lycopersicon gene because the Cys is an essential amino acid residue for HPL activity. From these observations, it could be assumed that a tomato gene corresponding to S. pennellii 9/13HPL gene had been inactivated through domestication of tomatoes. 相似文献
40.