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Pharmacokinetic analysis of plasma concentration and urinary excretion of sulphamonomethoxine and its metabolite in Goettingen minipigs 总被引:1,自引:0,他引:1
TAKAMITSU TSUBOI EI-ICHI KOKUE MINORU SHIMODA TOYOAKI HAYAMA 《Journal of veterinary pharmacology and therapeutics》1984,7(3):219-223
The plasma concentration and renal excretion after a bolus intravenous injection of a low (10 mg/kg) or high (100 mg/kg) dose of sulphamonomethoxine (SMM) were studied in five Goettingen minipigs. The time data of plasma concentration after a low dose decreased rapidly and appeared to be linear on semilog graph paper. On the other hand, a decrease in the plasma concentration after a high dose was slow at first, gradually accelerated, then became rapid, showing that SMM disposition after a high dose (100 mg/kg) seemed to be non-linear with capacity-limited elimination. A large amount of the acetyl derivative of SMM (AcSMM), which was determined to be the main excretory product of SMM in urine, was detected in the plasma after SMM injection. As the ratios of the area under plasma concentration-time curve of AcSMM to that of SMM were not significantly different at either dose, the acetylation of SMM may be unsaturable by injection of 100 mg/kg of SMM. Immediately after the injection of a low dose, a rapid hyperbolic increase of the fraction of the cumulative amount of the excretory products in urine was observed. On the other hand, the fraction curve at the high dose rose slowly at first, then rapidly and hyperbolically. These results suggested that the non-linear drug disposition after a high dose (100 mg/kg) of SMM in pigs may be the result of a limited capacity for renal excretion of SMM and excretory products, especially the acetyl derivative. 相似文献
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Takuro NAGAHARA Koichi OHNO Itsuma NAGAO Taisuke NAKAGAWA Yuko GOTO-KOSHINO Masaya TSUBOI James K. CHAMBERS Kazuyuki UCHIDA Hirotaka TOMIYASU Hajime TSUJIMOTO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2022,84(1):20
Intestinal lymphangiectasia (IL) is a common complication in dogs. Since nitric oxide (NO) is known to relax the lymphatic vessel, we evaluated inducible NO synthase (iNOS) expression using immunohistochemistry in 13 dogs with lymphoplasmacytic enteritis (LPE) with or without IL. The duodenal iNOS expressing cells were significantly increased in dogs with IL-negative or IL-positive LPE dogs (P=0.025, P=0.007) compared with control dogs. However, there was no significant difference in iNOS expression between IL-positive and IL-negative tissues. Based on these results, there is no clear evidence for the NO overproduction in the pathogenesis of IL in dogs with LPE. Factors other than NO could, thus, contribute to IL in dogs with LPE. 相似文献
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Takuro NAGAHARA Koichi OHNO Itsuma NAGAO Taisuke NAKAGAWA Yuko GOTO-KOSHINO Masaya TSUBOI James K. CHAMBERS Kazuyuki UCHIDA Hirotaka TOMIYASU Hajime TSUJIMOTO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2022,84(4):566
Intestinal lymphangiectasia (IL) is often observed in dogs with chronic small intestinal diseases. Hypoplasia of the lymphatic vessel due to decreased lymphangiogenesis, which has been suggested in human idiopathic IL, may contribute to the pathogenesis of canine IL. This study aimed to evaluate the diameter and number of lymphatic vessels in full-thickness small intestinal specimens of dogs with IL. Immunohistochemical labeling of lymphatic endothelial cell markers was performed on retrospectively retrieved full-thickness small intestinal specimens. Sixteen dogs with histologically confirmed IL were included, of which 10 had lymphoplasmacytic enteritis (LPE), and six had granulomatous lymphangitis (GL). Nine dogs that died from non-gastrointestinal disorders and with little or no abnormalities in the small intestine were used as controls. Lymphatic vessel diameters in dogs with IL were significantly increased in all layers of the small intestine, including the villus lacteal, lamina propria, submucosa, muscularis, and mesentery, compared with controls (all P<0.01). There was no significant difference in the lymphatic vessel diameters between dogs with LPE and GL (all P>0.05). There was no significant difference in the number of lymphatic vessels between dogs with IL and the controls in all layers of the small intestine (all P>0.05). This study demonstrated that IL was observed in all layers of the small intestine, including the submucosa, muscularis, and mesentery, independent of the underlying disease. Factors other than reduced lymphatic vessels would contribute to the pathogenesis of IL in dogs. 相似文献
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Sarunya NALUMPANG Yukie GOTOH Hiroyuki TSUBOI Kenji GOMI Hiroyuki YAMAMOTO Kazuya AKIMITSU 《Journal of General Plant Pathology》2002,68(2):118-127
A cDNA encoding a polygalacturonase-inhibiting protein gene (SaiPGIPA) was identified from the citrus cultivar Sainumphung (Citrus sp.), one of the most popular cultivars in northern Thailand. SaiPGIPA was expressed in Escherichia coli cells, and the functional properties of citrus PGIP were analyzed. The PGIP fusion protein inhibited by a maximum of about
60% of the endopolygalacturonase activity, and a mixture of the PGIP and fungal endopoly-galacturonase released oligogalacturonides
from polygalacturonic acid. The mixture containing the oligogalactur-onides, endopolygalacturonase and PGIP induced expression
of the PGIP gene and a chalcone synthase gene in citrus leaves. The mixture also induced resistance in cucumber leaves against
Colletotrichum lagenarium.
Received 5 September 2001/ Accepted in revised form 20 November 2001 相似文献
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Daiki KATO Mariko OISHI Koichi OHNO Ko NAKASHIMA Atsuhito WADA Tatsushi MORITA Soichi IMAI Masaya TSUBOI James K. CHAMBERS Kazuyuki UCHIDA Hajime TSUJIMOTO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(11):1499-1502
Ollulanus tricuspis is a small nematode parasite of the
stomach, and its infection has been reported worldwide in cats but only one report in dogs
as post-mortem diagnosis. Two dogs, kept in the Tokyo area, were presented for chronic
vomiting. Chronic gastritis was diagnosed histologically, and many nematodes were detected
in endoscopically-biopsied gastric samples and in the mucus of vomitus in both dogs. The
parasites were small (<1 mm), and their morphological characteristics were consistent
with those previously reported for O. tricuspis. The symptoms in one dog
completely disappeared after anthelmintic therapy. To our knowledge, this is the first
report describing ante-mortem diagnosis of spontaneous gastric O.
tricuspis infection in dogs in which infectivity and pathogenicity of the
nematode are suggested. 相似文献
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Kenjiro FUKUSHIMA Reina FUJIWARA Kie YAMAMOTO Hideyuki KANEMOTO Koichi OHNO Masaya TSUBOI Kazuyuki UCHIDA Naoaki MATSUKI Ryohei NISHIMURA Hajime TSUJIMOTO 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(12):1549-1553
Little information is available regarding triple-phase computed tomography (CT) of canine
pancreatic insulinoma. A few case reports with small numbers of cases have indicated that
hyper-attenuation in the arterial phase was a common finding on multi-phasic CT in dogs
with insulinoma. Our purpose was to clarify the characteristic findings of dogs with
insulinoma on triple-phase CT. Nine dogs with insulinoma that underwent triple-phase CT
were included in the present study. Attenuation patterns in the arterial phase indicated
hypo-attenuation in 4 cases and hyper-attenuation in 2 cases. In the remaining 3 cases, 1
case showed hypo-attenuation and 1 case showed hyper-attenuation in the pancreatic phase,
and 1 case presented hyper-attenuation in the later phase. Altogether, 5 cases showed hypo
and 4 cases showed hyper-attenuation in at least one phase. The enhancement pattern was
homogenous in 7 cases and heterogeneous in 2 cases. Tumor margins were well-defined in 5
cases and ill-defined in 4 cases. Capsule formation was present in 5 cases and absent in 4
cases. In conclusion, it is important to note that hypo-attenuation was as common as
hyper-attenuation in dogs with insulinoma in triple-phase CT in at least one phase.
Additionally, mass lesions were most conspicuous not only in the arterial phase but in the
pancreatic and later phases in some cases. Therefore, it is important to perform
triple-phase CT and notice about variable findings for the detection of canine pancreatic
insulinoma. 相似文献
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Namiko IKEDA Daiki KATO Masaya TSUBOI Ryohei YOSHITAKE Shotaro ETO Sho YOSHIMOTO Masahiro SHINADA Satoshi KAMOTO Yuko HASHIMOTO Yousuke TAKAHASHI James CHAMBERS Kazuyuki UCHIDA Ryohei NISHIMURA Takayuki NAKAGAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(12):1885
Cancer immunotherapy is a novel cancer treatment for canine tumors. Indoleamine 2,3-dioxygenase 1 (IDO1) is overexpressed in some human tumors and inhibits antitumor immunity. In this study, we comprehensively evaluated expression pattern of IDO1 and the nature of IDO1-expressing cells in canine normal and tumor tissues. In normal tissue samples, IDO1 expression was detected only in the lymph nodes, spleen, tonsil tissues, and colon tissues. In contrast, IDO1-positive tumor cells were observed in several tumor tissue types. This is the first study to evaluate IDO1 expression in canine normal and tumor tissues, and the results suggest that IDO1 is a promising target for novel cancer immunotherapy in dogs with tumors. 相似文献
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Satoshi KAMOTO Masahiro SHINADA Daiki KATO Masaya TSUBOI Sho YOSHIMOTO Ryohei YOSHITAKE Shotaro ETO Namiko IKEDA Yosuke TAKAHASHI Yuko HASHIMOTO James CHAMBERS Kazuyuki UCHIDA Shinji YAMADA Mika K. KANEKO Ryohei NISHIMURA Yukinari KATO Takayuki NAKAGAWA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2021,83(11):1795
Podoplanin is expressed in various human tumors where it promotes tumor progression, epithelial-mesenchymal transition, and distant metastasis. Podoplanin is also expressed in cancer-associated fibroblasts and induces tumor malignancy. The objective of this study was to evaluate podoplanin expression in various types of feline tumor tissues. Immunohistochemical analysis revealed that podoplanin was expressed in cells of 13/15 (87%) squamous cell carcinomas and 5/19 (26%) fibrosarcomas. Moreover, cancer-associated fibroblasts expressed podoplanin in most tumor types, including 18/21 (86%) mammary adenocarcinoma tissues. Our findings demonstrate that various types of feline tumor tissues expressed podoplanin, indicating the importance of the comparative aspects of podoplanin expression, which may be used as a novel research model for podoplanin biology. 相似文献
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