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51.
MASATOSHI OKAZAKI KOHEI ETO KATSUSHI FURUNO RYOZO OISHI YUTAKA GOMITA 《The Journal of pharmacy and pharmacology》1995,47(6):530-533
The influences of immobilization and footshock stress on pharmacokinetics of theophylline (20 mg kg?1) and caffeine (30 mg kg?1) administered orally were examined in rats. The immobilization stress for 30 min or 1 h immediately after oral administration caused marked immobilization period-related decreases in plasma theophylline concentrations during the absorption phase, but did not affect plasma caffeine concentrations. The ka and Cmax values for theophylline were significantly decreased, and the tmax was significantly increased. On the other hand, when the immobilization stress was loaded for 1 or 3 h before the oral administration, the plasma theophylline or caffeine concentrations were not affected. The footshock stress for 30 min immediately after oral administration did not significantly decrease plasma theophylline concentrations during the absorption phase. These results suggest that the pharmacokinetics of theophylline are influenced by strong stress, possibly due to the inhibition of its absorption from the gastrointestinal tract, but the pharmacokinetics of caffeine are not influenced by stress, probably due to its central action. 相似文献
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AKITOSHI TAKIZAWA TAKESHI MIURA KIYOSHI FUJINAMI SATOSHI KAWAKAMI YUTAKA OSADA YOICHI KAMEDA 《International journal of urology》2005,12(6):596-598
We report a case of primary testicular leiomyosarcoma. A 76-year-old man, who complained of left scrotal swelling for 6 months, underwent radical orchiectomy. Microscopic examination revealed intratesticular leiomyosarcoma. The patient received no adjuvant therapy and at 12 months after surgery, there had been no recurrence. Primary leiomyosarcoma of the testis is extremely rare; this is the 9th case recorded worldwide. 相似文献
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YOSHITAKA HASHIMOTO TERUO MURAKAMI CHINAMI KUMASA YUTAKA HIGASHI NOBORU YATA MIKIHISA TAKANO 《The Journal of pharmacy and pharmacology》1998,50(6):621-626
To estimate the absolute concentration of substrates surrounding a microdialysis probe in-vivo, we developed a simple calibration method using endogenous glucose as an internal recovery marker and determined the skin distribution of tranilast (N-(3,4-dimethoxycinnamoyl)anthranic acid), an anti-allergic agent, in rats. This calibration method was based on the assumption that the concentration of glucose in the extracellular fluid of skin tissues is the same as that in plasma and that the in-vivo recovery ratio of glucose to tranilast by microdialysis is the same as that estimated in-vitro. Based on these assumptions, the dialysate concentrations of tranilast and glucose recovered from cutaneous microdialysis, glucose concentration in plasma, and in-vitro recovery ratio of tranilast to glucose by microdialysis were determined for the estimation of absolute unbound concentration of tranilast in the extracellular fluid of skin tissues. In an in-vitro study employing plasma containing tranilast, the unbound concentration of tranilast in plasma estimated from the dialysate concentration was just comparable with that determined by ultrafiltration methods. Also in an in-vivo study under steady-state plasma concentration of tranilast in rats, the estimated concentration of tranilast in the skin extracellular fluid was the same level as the unbound concentration of tranilast in plasma. Using the present calibration method, the skin distribution of tranilast administered into the intestinal loop or transdermally was continuously monitored in a quantitative manner. 相似文献
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KAZUTOSHI FUJITA KAZUO NISHIMURA YUTAKA YASUNAGA OSAMU MIYAKE SEIICHI HIROTA AKIHIKO OKUYAMA 《International journal of urology》2003,10(9):492-494
A 36-year-old man presented with macroscopic hematuria associated with right flank pain. Examination of the patient revealed a cystic mass in the right kidney. Because the mass had increased in size, enucleation of the mass was performed. Histopathological findings revealed nephroblastoma, therefore, radical nephrectomy was performed. We believe the pathogenesis of the cystic formation to be a process in which a tumor that had developed in the pericalyceal region spontaneously ruptured, exuding urine into the perinephric space, forming a cystic mass. The patient is alive with no evidence of disease 24 months after the operation. 相似文献
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YASUO OHNO TORU KAWANISHI ATSUSHI TAKAHASHI AKIRA TAKANAKA YUTAKA KASUYA YOSHIHITO OMORI 《The Journal of pharmacy and pharmacology》1984,36(11):743-747
Renal microsomal aminopyrine demethylation activities of several species were measured by a sensitive radiometric method using [dimethylamino-14C-]aminopyrine as a substrate and 2,4-dinitrophenylhydrazine as a trapping agent for the formaldehyde formed. The activity was highest in hamsters (0·75 nmol min−1 mg−1 protein) and that in rabbits, rats, mice, and guinea-pigs was 19·7, 7·0, 4·5 and 3·7%, respectively, of the hamster values. These species differences did not correlate with species differences in cytochrome P-450 content or in NADPH cytochrome c reductase activity. Aminopyrine demethylation activities in sliced renal tissues of several species were also compared. This activity was also found highest in hamsters (0·54 nmol min−1 g−1 wet tissue) and the activities in rabbits, rats, and guinea-pigs were 9·2, 1·8 and 2·5%, respectively, of the hamster values. 相似文献
60.
CHISATO NAGATA M.D. SETSUYA FUJITA M.D. HIROTOSHI IWATA M.D. YUTAKA KUROSAWA M.D. KATSUYOSHI KOBAYASHI M.D. MASAYO KOBAYASHI M.D. KAZUO MOTEGI M.D. TOSHITAKA OMURA M.D. MASAHARU YAMAMOTO M.D. TAKAYUKI NOSE M.D. KEN-ICHI NAKAMURA M.D. TSUTOMU HASHIMOTO M.D. YOSIKAZU NAKAMURA M.D. HIROSHI YANAGAWA M.D. 《International journal of dermatology》1995,34(5):333-337
Background. Systemic lupus erythematosus (SLE) is designated by the Japanese government as one of the intractable diseases and all patients, who suffer from these diseases, are registered to get financial aid for treatment. Using newly registered SLE patients, a case-control study was conducted to evaluate potential risk factors. Methods. Two-hundred and eighty-two women SLE patients, newly registered to receive financial aid for treatment, and 292 randomly selected health examination participants at public health centers (controls) were surveyed from April 1988 through March 1990. By means of a self-administered questionnaire, data concerning demographic variables, smoking and drinking habits, past medical and reproductive history, and family history were collected. Results. Based on unconditional logistic regression analysis, the risk of SLE was significantly increased for current smokers (age-adjusted odds ratio (OR) = 2.31, 95% confidence interval (CI) (1.34–3.97). Alcohol and milk intake were inversely associated with risk. Family histories of asthma and collagen diseases, including SLE, were associated with significantly elevated risk of SLE (OR = 2.07, 95% ci 1.14–3.77; OR = 5.20, 95% CI 1.08–24.95, respectively). Regarding reproductive function, women with menarche at age 15 or later had significantly higher risk than those, who started menstruating before age 12 (OR = 3.82, 95% CI 1.66–8.81 for menarche at > 15 years and OR = 2.90, 95% a 1.14–7.39 for menarche at 16y). Conclusions. Our study suggests several risk factors, including smoking, family history, and reproductive history that may increase the risk of SLE. 相似文献