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Biomedical subjects

S Koike

Publications and source records attributed to S Koike.

At least 217 records · Page 12Linked to original sources
PubMed1986

Inhibitory effects of the porcine follicular fluid on estradiol and progesterone secretion by cultured rat granulosa cells.

The effect of porcine follicular fluid on estradiol and progesterone secretion was examined using a rat granulosa cell culture with FSH and testosterone in the medium. Follicular fluids from small (less than 5 mm) and large (greater than 6 mm) follicles (SFFI, LFF1) were treated with charcoal, and then fractionated by filtration through an Amicon XM-50 and an PM-10 membrane. The addition of 25% SFF1 and LFF1 into the culture system significantly inhibited estradiol and progesterone secretion (P less than 0.005). These inhibitory activities were observed in PM-10 retentates (10,000-50,000 MW) and filtrates (less than 10,000 MW) of SFF1 and LFF1. The addition of XM-50 filtrates (less than 50,000 MW) of SFF1 and LFF1 caused a dose-dependent inhibition of estradiol and progesterone secretion. The dose-response relationship between the filtrates and estradiol secretion was linear with a significant correlation coefficient. The addition of the filtrates exerted no inhibitory effect on the growth of the cells cultured. XM-50 filtrate of LFF1 from a batch with a low ratio of small/large follicles showed a lower inhibitory activity on estradiol secretion than that of LFF1, while the inhibitory activities in both filtrates on progesterone secretion were almost equivalent. These results suggest that the follicular fluid of small porcine follicle contains nonsteroidal regulators capable of inhibiting estradiol and progesterone secretion by cultured rat granulosa cells, and that the estradiol secretion inhibitor activity decreases in the fluid of large follicle while the progesterone secretion inhibitor activity does not decrease in it.

Animals↗
PubMed1986

Difference in prognosis between T- and B-cell lymphomas: clinical study at Shikoku Cancer Center Hospital.

In order to determine whether the surface marker phenotypes of non-Hodgkin's lymphomas affect the prognosis, we have studied the differences in response rate and duration of survival between T- and B-cell lymphomas. Sixty-four patients who underwent first-line therapy, including combination chemotherapy and/or radiotherapy, from February 1979 to August 1985 were evaluated. With the aid of standard immunological methods and monoclonal antibodies related to T-cells and B-cells, 21 T-cell lymphomas and 21 B-cell lymphomas were identified. In the other 22 cases phenotypes were not determined mainly because of the inability to obtain fresh samples. The complete remission rate was 100% for B-cell lymphomas and 52.3% for T-cell lymphomas. The median survival time for patients with lymphomas of Stage III and IV, excluding those with low-grade histology, was nine months for T-cell lymphomas and 17 months for B-cell lymphomas. T-cell lymphomas were found to have significantly poorer prognosis than B-cell lymphomas. One patient with B-cell lymphoma and six patients in an undetermined phenotype group, who were treated with combination chemotherapy, have been alive more than three years without relapse and these patients are considered potentially cured. Our results suggest that the surface marker phenotype study of lymphoma cells as well as histological subtyping is important in prognosis and that more effective therapy is needed to improve the prognosis of T-cell lymphomas.

Antibodies, Monoclonal↗
PubMed1986

[Clinicopathological studies on cases of multiple primary carcinomas of the esophagus associated with carcinoma of the hypopharynx and cervical esophagus].

Four cases of multiple primary carcinoma of the esophagus associated with dysplasia were found among seven patients with squamous cell carcinoma of the hypopharynx and cervical esophagus at the Shikoku Cancer Center Hospital. Two minute carcinomas were observed in these cases. One of them was too small to detect clinically despite the application of esophagoscopy with the Lugol's solution spraying method. All four patients had continued to smoke and consume alcoholic beverages (regularly) (habitually). These findings suggested that total esophagectomy is applicable to patients with hypopharyngoesophageal cancer, particularly those who continue to drink and smoke regularly.

Aged↗
PubMed1986

[Autosomal translocation and associated male infertility].

Four balanced autosomal reciprocal translocations were found through mitotic chromosome analysis among 72 subfertile males, 27 with azoospermia and 45 with sperm counts below 40 X 10(6)/ml. They were 46, XY, t(3; 20; 21) with azoospermia, 46, XY, t(14; 21) with sperm counts below 1 X 10(6)/ml, 46, XY, t(1; 19) lqh+ with azoospermia and 46, XY, t(3; 16) with sperm counts 27 X 10(6)/ml. Histological, cytogenetic and hormonal analysis were performed. Testicular biopsies from the first 3 carriers revealed complete spermatogenic arrest at the spermatocyte stage and meiotic studies of the same biopsies showed severe reduction in numbers of cells in 2nd meiotic division. In spite of severely defective spermatogenesis, serum gonadotropins of the carriers were within normal range, except for LH of the 4th case. Other chromosomal aberrations observed were 5 Klinefelter's syndrome, 2 autosomal minor variants (46, XY, 15p+ and 46, XY, 14s+) and 1 small Y.

Chromosomes, Human, 1-3↗
PubMed1986

[Combined effect of the topical administration of OK-432 with radiation on the C3H mouse fibrosarcoma (NFSa)--TCD50 and the mechanism of action].

Optimal timing of topical administration of OK-432 and TCD50 were studied using weakly immunogenic and radioresistant C3H mouse fibrosarcoma (NFSa). The mechanism of action of this combined therapy was examined histologically and electron microscopically. Topical administration of OK-432 was performed from 2 days before irradiation to 7 days after irradiation and tumor volumes on the 20th day after irradiation were compared with a control group given radiation alone. Significant difference was observed only in the group which was given OK-432 just after irradiation. The TCD50 of the combined therapy of radiation with topical administration of OK-432, 4 KE which was given just after irradiation was 64.5 Gy and that of radiation alone was 83.5 Gy. Combined therapy shifted the TCD50 curve about 20Gy to the left. Histological examination of the tumor on the 6th day after combined therapy showed marked degeneration and necrosis of tumor cells with marked infiltration of lymphocytes. These lymphocytes were electron microscopically seen surrounding not only damaged cells, but also apparently active tumor cells. We postulate the latter cells had a tendency to be degenerative. This phenomenon suggests that lymphocytes recognize as foreign these tumor cells which are apparently active but some what damaged by radiation.

Administration, Topical↗
PubMed1986

[Determination of urinary N-acetyl-beta-D-glucosaminidase (NAG) excretion as a parameter of nephrotoxicity due to cis-platin and the effect of fosfomycin (FOM) on its nephrotoxicity].

CDDP is often dose-limited owing to its nephrotoxicity. Urinary NAG was measured to evaluate the nephrotoxicity of CDDP in 18 patients (DIV: 12 patients, Intra-Peritoneal: 6 patients) with or without Fosfomycin. The gradual increase in urinary NAG activity was noted on repeating the therapy. 24 hour NAG excretion was correlated with that of urinary beta 2-microglobulin. However, urinary NAG was not correlated with Ccr 24 or BUN. Though Ccr 24 and BUN were normal, urinary NAG and beta 2-microglobulin markedly increased during CDDP therapy. Fosfomycin administration significantly decreased urinary NAG, which was increased by CDDP. These results indicate that: The measurement of urinary NAG and beta 2-microglobulin are most useful in estimating the nephrotoxicity of CDDP. Fosfomycin decreases the nephrotoxicity of CDDP.

Acetylglucosaminidase↗