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Biomedical subjects

T Naruse

Publications and source records attributed to T Naruse.

At least 253 records · Page 14Linked to original sources
PubMed1984

Adrenocortical carcinoma responded to treatment with o,p'-DDD--a case report.

A case of a huge inoperable adrenocortical carcinoma which secreted testosterone without characteristic symptoms was treated with o,p'-DDD (2,2-bis(2-chlorophenyl-4 cholorophenyl) 1,1-dichloroethane). With this therapy, the tumor decreased in size which was confirmed by the computed tomography (CT). Eighteen months later, however, lethargy and logopathy appeared and the tumor grew again rapidly with the withdrawal of o,p'-DDD performed for the evaluation of these mental disturbances. The tumor then diminished gradually in size soon after the treatment was resumed and the above unfavorable symptoms were not developed again with the combined administration of a central nervous stimulant. During o,p'-DDD treatment, plasma testosterone and estrogen decreased, and plasma aldosterone also decreased but within the normal range. Plasma cortisol also tended to decrease despite hydrocortisone was administered. Plasma adrenocorticotropic hormone (ACTH) was maintained within the normal range for the first six months but then increased gradually. It decreased and became normal with the additional administration of hydrocortisone. The patient's normal menstruation at the preadministrative stage changed to oligomenorrhea, then amenorrhea after the treatment, but no endocrinological sign except for the menses was observed during the treatment.

Adrenal Cortex Neoplasms↗
PubMed1982

Differences in the pharmacological actions of intrathecally administered neurotensin and morphine.

Neurotensin or morphine can each cause hypothermia and an antinocisponsive effect when administered into the liquor spaces of the rat brain. These actions of neurotensin are not blocked by naloxone whereas those of morphine are. The present experiments were carried out to examine the action of each substance following its injection into the subarachnoid space of the spinal cord. Given intrathecally, neurotensin evoked a dose-related fall in the rectal temperature of the rat without exerting an antinocisponsive action. Morphine on the other hand evoked hyperthermia and a dose-related antinocisponsive action. Since neurotensin exerted an effect on rectal temperature opposite to that of morphine and failed to exert an antinocisponsive effect, the data provide further evidence to suggest that neurotensin and morphine exert their effect via different mechanisms. Furthermore, the results also suggest that neurotensin exerts its antinocisponsive action via a supraspinal site.

Analgesics↗
PubMed1982

Effects of various antiplatelet drugs and defibrinating agent on experimental glomerulonephritis in rats.

Two types of experimental GN induced by immunological procedures. Heymann-type AIC-GN and NTN, were treated with anticoagulant agents. Dipyridamole, aspirin, ticlopidine or batroxobin was administered either to rats with AIC-GN for 14 to 28 days or to NTN rats 2 days prior to injection with NTS and 14 to 21 days thereafter. A significant decrease in the amount of urinary protein was observed only in rats treated with 12.5 to 50.0 mg/kg dipyridamole daily, whereas no significant decrease in proteinuria was observed in either AIC-GN or NTN rats treated with the other agents. Histopathologically, no improvement in the light and electron microscopic findings was noted in AIC-GN rats treated with these agents, even with dipyridamole. On the other hand, in NTN rats, light and electron microscopic study of the kidneys from rats sacrificed 30 to 60 min after NTS injection revealed that platelet aggregation and inflammatory changes in the glomeruli were remarkable reduced in rats pretreated with 56.4 mg/kg aspirin or 50.0 mg/tg triclopidine daily, but no difference in the renal lesions between rats treated with aspirin or triclopidine and control animals were observed 2 weeks after NTS injection. No histological improvement was observed in rats pretreated with dipyridamole. It would be reasonable to conclude from these results that the favorable effect of dipyridamole on proteinuria is not related to its antiplatelet activity and that platelet aggregation is not essential to the development of renal lesions in rat AIC-GN and NTN. (J Lab Clin Med 99:428, 1982.)

Animals↗
PubMed1981

Clinical evaluation of urinary N-acetyl-beta-D-glucosaminidase activity in patients receiving aminoglycoside and cephalosporin drugs.

N-acetyl-beta-D-glucosaminidase (NAG) activity in urine was measured as an indicator for detecting the onset of renal damage in patients receiving aminoglycoside and cephalosporin drugs. The studies reveal that gentamicin appears to be most nephrotoxic of the aminoglycoside antibiotics. Polyuria, not oliguria, is the first clinical symptom observed in patients with marked elevation of urinary NAG activity more than 10 mM/hr/day and moderate proteinuria and disturbance of renal function are followed in some cases. Although immediate recovery from these nephrotoxic effects of aminoglycosides and the elevation of urinary NAG activity occurs on prompt withdrawal of the drugs, two autopsied cases receiving prolonged administration of gentamicin, followed marked NAG elevation, show necrosis and exfoliation of tubular epithelial cells with little glomerular injury. The other aminoglycosides, such as amikacin, tobramycin and dibekacin are less nephrotoxic, and the administration of cephalosporin developed no nephrotoxic symptoms nor marked elevation of urinary NAG activity. The results indicate that measurement of urinary NAG activity is useful for the early diagnosis and monitoring of nephrotoxic reactions due to aminoglycosides.

Acetylglucosaminidase↗