Biomedical subjects

O Ishiko

Publications and source records attributed to O Ishiko.

103 records · Page 6Linked to original sources

PubMedDate not supplied

An intranodal morcellation technique employing loop electrosurgical excision procedure for large prolapsed pedunculated myomas.

For minimally invasive resection of large prolapsed pedunculated submucous myomas, improved techniques need to be established. An intranodal loop electrosurgical excision procedure (LEEP) was specifically developed for the morcellation of myoma tissue during vaginal myomectomy. Vaginal myomectomy was performed on a 28-year old woman with a large myoma occupying the small pelvis. A prolapsed pedunculated leiomyoma of the uterus 13 cm in maximal diameter was resected by intranodal morcellation of the myoma tissue employing LEEP. Intranodal morcellation technique utilizing LEEP is an effective method for the minimally invasive resection of large prolapsed pedunculated myomas.

Adult↗

PubMedDate not supplied

Cyclooxygenase-2 expression in malignant mesenchymal tumors and related uterine lesions.

The aim of this study was to determine whether the expression of cyclooxygenase-2 (COX-2) in uterine sarcoma cells and carcinosarcoma cells is associated with cell type. Nineteen sections of tissues from uterine sarcomas, carcinosarcomas, and an adenosarcoma, and endometrial stromal sarcomas, were immunohistochemically analyzed for the cellular expression of COX-2. Positive immunostaining for COX-2 was observed in 88.9% (8/9) uterine carcinosarcomas, uterine adenosarcomas but was not observed in uterine sarcomas and the endometrial stromal sarcoma (0/10). But positive immunostaining for COX-2 was observed in some sarcomatoid cells in carcinosarcoma tissue. These findings suggest that some of the sarcoma cells in uterine carcinosarcomas resemble epithelial malignant cells in regard to the increase in COX-2 expression, and support the hypothesis that some uterine carcinosarcomas are combination tumors. This may serve as a basis for new chemoprevention and treatment strategies for uterine carcinosarcomas through the inhibition of COX-2 activity.

Adenosarcoma↗

PubMedDate not supplied

Primary peritoneal clear cell carcinoma: excellent results from paclitaxel and carboplatin combination chemotherapy.

While papillary serous adenocarcinomas are histocytologically common in primary peritoneal carcinomas, clear cell carcinomas are rare. We report a new regimen for the treatment of recurrent clear cell carcinomas of the peritoneum. A 45-year-old woman was referred to our hospital and underwent optimal debulking surgery. Thirty-two months after the operation, lymph node swelling and elevation of serum CA19-9 were detected and recurrence was diagnosed. Paclitaxel (175 mg/m(2)) in a 3-hour and carboplatin (300 mg/m(2)) in a 1-hour infusion were repeated at three-week intervals. After completion of four courses, abdominal CT and serum CA19-9 were undertaken and results compared. Lymph node swelling was significantly decreased and the serum CA19-9 level was decreased to within a normal range. Paclitaxel and carboplatin combination chemotherapy may be effective in preventing the recurrence of peritoneal carcinomas.

Adenocarcinoma, Clear Cell↗

PubMedDate not supplied

Transient shrinkage of a uterine leiomyosarcoma treated with GnRH agonist for a presumed uterine leiomyoma: comparison of magnetic resonance imaging finding before and during GnRH agonist treatment.

We present a case of a premenopausal woman treated with GnRH agonist for a presumed uterine leiomyoma. This tumor reduced at first, but subsequent surgical specimens revealed a leiomyosarcoma. Magnetic resonance imaging (MRI), one of the most useful modalities for distinguishing between uterine leiomyoma and leiomyosarcoma, was undertaken twice, before GnRH agonist administration and then after 6 months of GnRH agonist administration. Apparent differences were observed between these MRI findings. Tumor-size reduction with GnRH agonist treatment does not always mean that the possibility of a leiomyosarcoma should be ruled out.

Antineoplastic Agents, Hormonal↗

PubMedDate not supplied

Association between overexpression of cyclooxygenase-2 and suppression of apoptosis in advanced cancer of the uterine cervix after cyclic balloon-occluded arterial infusion.

Recent advances in cancer chemotherapy have drawn the attention of investigators to the usefulness of chemotherapy for cancer of the uterine cervix in general, and we ourselves have previously reported satisfactory therapeutic results of cisplatin-based cyclic balloon-occluded arterial infusion chemotherapy (BOAI), which enabled treatment by hysterectomy in patients with advanced cervical cancer. Nevertheless, there have been some patients in whom CDDP therapy by BOAI was ineffective, and hysterectomy was impracticable. In the present study we investigated the expression of cyclooxygenase-2 (COX-2) in these cases in an attempt to identify the cause of the lack of efficacy. The subjects of the study were 38 women with advanced cervical cancer classified as FIGO (International Federation of Gynecology and Obstetrics) stage III or higher who were admitted to the Department of Gynecology of Osaka City University Medical School Hospital between July 1993 and April 2000. All of these patients were treated by BOAI, and expression of COX-2, angiogenic factors, and cancer cell apoptosis, before and after BOAI were examined, and survival rates were compared. The 18 patients in whom BOAI was ineffective showed significantly higher expression of COX-2 after BOAI, and cancer cell apoptosis was inhibited. The 5-year survival rate of these patients was 16.8%, as opposed to 54.1% in the 20 patients in whom BOAI was effective. These results suggest that overexpression of COX-2 inhibits cancer cell apoptosis and adversely influences the prognosis.

Adult↗

PubMedDate not supplied

Pharmacokinetics and pharmacodynamics of serum platinum of gynecologic cancer patients treated with nedaplatin.

Nedaplatin (cis-diammine glycolate platinum) is one of the effective platinum agents for gynecologic carcinoma. In order to assess the pharmacokinetics and pharmacodynamics of serum platinum of gynecologic cancer patients treated with nedaplatin, we calculated 10 course AUCs (area under the curve) of the free and total platinum from blood samples of 4 patients. Peak serum platinum concentrations were dependent on infusion times. In the case of a patient with renal dysfunction or ascites, the concentration of serum platinum tended to stay at a high level for a long time. Serum-free platinum ratios were maintained longer than cisplatin. Low dose nedaplatin administration and divided administration were effective, but total AUC was not so great. The relation between AUC ratio (free platinum AUC/total platinum AUC) and dose/m(2) was not clarified.

Adult↗

PubMedDate not supplied

Probucol decreases total body fat loss in VX2-carcinoma-induced cachectic rabbits.

We previously reported the continuous decrease of total body fat in VX2-carcinoma-bearing rabbits after tumor implantation, as well as changes in the serum lipid profile. Probucol, an antioxidant drug, has a cholesterol lowering effect against hyperlipidemic subjects. VX2-carcinoma-bearing rabbits fed with a diet containing 1% probucol did not show any difference in serum lipid compositions as compared with rabbits fed with a control diet. Similarly serum lipolytic activity showed no differences, whether probucol was administered or not, while the decrease in total body fat was significantly less when probucol was administered.

Adipose Tissue↗

PubMedDate not supplied

Expression of angiogenic factors in extrapelvic endometriosis.

The expression of vascular endothelial growth factor (VEGF) and cyclooxygenase-2 (COX-2) were immunohistochemically examined in both pelvic and extrapelvic endometriotic lesions. Different expressions of VEGF and COX-2 were observed in both lesions. VEGF immunoreactivity was distributed mainly in the cytoplasm of the adenocytes in inguinal tumors, but was not seen in ovarian tumors. COX-2 showed the same findings. These results suggest that angiogenesis may be involved in the pathogenesis of extrapelvic endometriosis.

Abdominal Neoplasms↗

PubMedDate not supplied

Balloon-occluded arterial infusion chemotherapy, simple total hysterectomy, and radiotherapy as a useful combination-therapy for advanced cancer of the uterine cervix.

We first performed 3 or 4 courses of balloon-occluded arterial infusion (BOAI) chemotherapy in 19 patients with advanced cancer of uterine cervix classified as stage III-IV according to the International Federation of Gynecology and Obstetrics. In the patients in whom the first BOAI resulted in insufficient drug accumulation in tumor tissue, the ovarian arteries and veins were ligated to improve the therapeutic effect. Ultimately simple total hysterectomy and radiotherapy were performed in 9 patients in whom the uterus was resectable (the combination group), and radiotherapy alone was conducted in the other 10 patients in whom hysterectomy was not practicable (the incomplete group). The survival rates were significantly higher in the combination group (2-year survival 88. 9%; 5-year survival 66.7%) than in the incomplete group (p=0.0013).

Aged↗

PubMedDate not supplied

Retrospective study of the prognostic factors of remission induction for single-agent chemotherapy with cisplatin in advanced epithelial ovarian cancer.

A retrospective study to explore the prognostic factor was conducted in 39 patients with advanced epithelial ovarian cancer, FIGO stage III-IV, who underwent single-agent adjuvant chemotherapy with cisplatin following primary debulking surgery. The survival rate following the adjuvant chemotherapy was 50.9% after 3 years and 44. 7% after 5 years, with a median survival time of 40.4 months. The actual dose intensity of the cisplatin ranged from 14.38 to 46.30 mg/m2/week, and the total dose/m2 was 143.79 to 645.83 mg/m2. Under these therapeutic conditions, the actual dose intensity was found to correlate with survival time (p<0.05), but there was no correlation between the total dose/m2 and survival time.

Adult↗

PubMedDate not supplied

Effects of cyclic plasma perfusion on adipocyte apoptosis and lipolytic activity in VX2 carcinoma-bearing rabbits.

BACKGROUND: In an animal model we found that total body fat (TBF) decreased with progression of tumors, but that it rebounded after cyclic plasma perfusion (CPP). In this study, we investigated changes in adipocyte apoptosis and serum lipolytic activity (LA) after CPP. MATERIALS AND METHODS: TBF, LA, and adipocyte apoptotic index (AAI) in VX2 carcinoma-bearing rabbits were measured every ten days after implantation. CPP was performed every 5 days from post-implantation day (PID) 14. RESULTS: TBF decreased as the days passed and reached 43.2 +/- 10.0% on PID 50 in the non-CPP group, while it decreased 22.7 +/- 8.8% in the CPP group. LA on PID 50 was 17.8 +/- 14.0, 33.2 +/- 6.3 mumol glycerol/10(5) adipocytes in the non-CPP group, while LA did not increase in the CPP group. AAI was 28.8 +/- 16.4, 27.8 +/- 17.7, 10.3 +/- 9.9 and 0.4 +/- 1.1 on PID 10, 20, 30, and 40, respectively, in the non-CPP group. No change was noted in AAI after CPP. CONCLUSIONS: CPP removed a humoral factor that possesses TBF-decreasing LA, but it did not suppress adipocyte apoptosis.

Adipocytes↗

PubMedDate not supplied

Induction of estradiol synthesis by probucol in the adenocarcinoma cells of an ovarian clear cell tumor.

BACKGROUND: Clear cell tumor of Müllerian organs have characteristic intracellular structures with numerous small mitochondria, free ribosomes, lamellae of granular endoplasmic reticulum and intracytoplasmic glycogen granules, but synthesize no estrogens under ordinary conditions. MATERIALS AND METHODS: Cells from an ovarian clear cell tumor cultured with 10 micrograms/ml of the antioxidant probucol released more estradiol into the medium than cells cultured without probucol. Immunocytological analysis revealed the predominance of estradiol in the adenocarcinoma cells cultured with probucol. RESULTS: There was no difference in the distribution of low-density lipoprotein receptors in adenocarcinoma cells according to whether they had been cultured with or without probucol. Cytochemical analysis showed that hydroxylation of estrone was accelerated in the adenocarcinoma cells cultured with probucol as compared to the cells cultured without probucol. CONCLUSION: Probucol is thought to have an unknown function in the acceleration of hydroxylation of steroids in some types of cells with estrogen-producing potential.

Adenocarcinoma, Clear Cell↗

PubMedDate not supplied

Expression of skeletal muscle cells apoptosis regulatory proteins in plasma-perfused VX2 carcinoma-bearing rabbits.

BACKGROUND: In tumor-bearing animals we found that the skeletal muscle apoptosis might be involved in muscle wasting. In this study, we investigated changes in the skeletal muscle cell apoptosis regulatory proteins after cyclic plasma-perfusion (CPP). MATERIALS AND METHODS: We studied changes in body weight, lean body mass (LBM), apoptotic index (AI) and expression of Bax and Bcl-2 in skeletal muscle in VX2 carcinoma-bearing rabbits. RESULTS: 20 days after tumor implantation, LBM had decreased by 5.06+/-1.10%, while the AI had increased to 40.5+/-3.20%. By 40 days, LBM had decreased by 11.0+/-0.81% and the AI was only 0.93+/-0.96%. Bax expression was detected in proportion to the AI, but no Bcl-2 expression was detected in either the experimental or control groups. CPP improved LBM, but did not prevent Bax expression. CONCLUSION: Skeletal muscle cell apoptosis related to Bax was concluded to be the cause of muscle wasting in VX2 carcinoma-bearing rabbits. CPP appears to reduce muscle wasting and increase LBM, but it did not suppress Bax expression or skeletal muscle cell apoptosis.

Animals↗