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Biomedical subjects

C Hirose

Publications and source records attributed to C Hirose.

10 recordsLinked to original sources
PubMed1992

[Percutaneous absorption of drug from alpha-olefin oligomer gel bases].

The percutaneous absorption of drug from the alpha-olefin oligomer (alpha-OL) gel base prepared by using palmitate of dextrin (Rheopearl KL) as a gelling agent was investigated by using the abdominal skin of rats in vivo. The 20, 30, 40 and 50 alpha-OLs with average molecular weights of 288, 380, 440 and 535, respectively were used in this study. The flurbiprofen (FP) was selected as a model drug. The percutaneous absorption of FP from the alpha-OL gel base was observed to be influenced by the molecular weight of alpha-OL. The percutaneous absorption profiles of FP from 40 and 50 alpha-OLs gel bases were almost the same. On the other hand, the absorption of FP from 30 alpha-OL gel base was significantly higher than those of 40 and 50 alpha-OLs gel bases. Furthermore, the percutaneous absorption of FP from 20 alpha-OL gel base was observed to be the highest in the test gel bases. In order to establish the reason for the differences in the percutaneous absorption of FP from 20, 30, 40 and 50 alpha-OLs gel bases, the apparent partition ratios of FP between water and four different alpha-OLs were determined as a parameter of the affinity of FP for the vehicle. Consequently, it has become apparent that the partition ratio exerts an influence on the percutaneous absorption of FP from the alpha-OL gel bases.

Alkenes↗
PubMed1988

[A study of CDDP in the treatment of patients with gastric and esophageal cancers, with special reference to the evaluation of renal functions before and after CDDP administration].

Although CDDP has been widely used for cancer chemotherapy in recent years, the problem is that it causes a renal dysfunction as a side effect. As briefly reported here, we have currently used this drug for the treatment of stomach esophageal cancers as a part of multidepartmental therapy, and obtained a finding on the therapeutic usefulness, particularly for monitoring the renal function before and after administration. The subjects were 6 patients with stomach and 11 with esophageal cancer given CDDP at the dose of 50 mg 2 courses, in principle, a single course per week. Blood transfusion was carried out in an amount of 1,000 ml before administration, 2,500 ml on the day of treatment and 1,000 ml for 3 days after administration. When the effects of CDDP on urinary BUN, Na, K, Cl, Mg, NAG, beta 2 microglobulin, Ccr and FENa levels were measured for the determination of renal functions before and after administration, NAG and beta 2 microglobulin levels were conceivably found to be useful indices.

Adult↗
PubMedDate not supplied

Measurement of thyroid iodine by CT.

For evaluation of thyroidal iodine kinetics and thyroid nodules, we carried out quantitative in vivo measurement of thyroid iodine concentration by CT. Neuron activation analysis of iodine content was conducted on 48 thyroid fragments without calcification operatively obtained from 18 patients who had undergone CT of the thyroid without contrast enhancement. The CT attenuation values were obtained from the regions of interest in the CT image that corresponded to the analyzed fragment. When iodine concentration in the thyroid tissue was greater than 0.02 mg/g, the CT values correlated linearly with the iodine concentrations in thyroid nodules, thyroids with diffuse thyroid disease, and normal thyroids. The relationship is represented by the following formula: iodine concentration (mg/g) = (CT value-65)/104. The relationship between iodine concentration and CT value in diffuse thyroid disease, thyroid nodules, and normal thyroids was not significantly different.

Humans↗