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Biomedical subjects

O Abe

Publications and source records attributed to O Abe.

At least 163 records · Page 9Linked to original sources
PubMed1988

[Hormone independent murine carcinoma BX-1 spontaneously arising from nude mouse bearing Br-10, a hormone dependent human breast carcinoma strain].

BX-1, an adenocarcinoma spontaneously arising from nude mouse bearing Br-10, a human breast carcinoma strain was characterized. And the purification of a hormone independent murine carcinoma strain, BX-1 was found in August 1986 in three institutes where a hormone dependent transplantable human breast carcinoma cell line Br-10 has been serially passaged. The histological features of BX-1 were different from any other strains which were maintained in these three institutes. Estrogen receptor of BX-1 was negative and no estrogen dependency was observed while Br-10 was the receptor positive and the growth of Br-10 was dependent on estrogen. Although the graft of BX-1 into the thymus intact littermates was rejected, the chromosomal analysis revealed only murine chromosomes for BX-1, while both of human and murine chromosomes were detected in Br-10 tumor. By incubating Br-10 tumor in untreated female nude mice for 2 months and stimulating the growth of the tumor by exogenous estradiol, the purification of Br-10 from BX-1 could be achieved. Whereas the stability of human tumor xenografts in nude mice is confirmed, the spontaneously arising murine tumor from nude mice bearing human tumor xenografts should be considered for the experiments.

Adenocarcinoma↗
PubMed1988

[Transcatheter arterial chemoembolization and selective hepatic arterial infusion using totally implantable reservoir].

Transcatheter arterial chemoembolization (TAE) and hepatic arterial infusion using totally implantable reservoir were performed for the treatment of liver metastasis of colo-rectal cancers, and their therapeutic effects, side effects and complications were evaluated. Eleven cases of H1 (metastasis in one lobe only), 7 cases of H2 (a few scattered metastases in both lobes), 12 cases of H3 (numerous metastases in both lobes) were entered into the study and underwent TAE 45 times. Gel foam, Ivaron and Lipiodol were used as embolic materials in combination with chemotherapeutic agents such as mitomycin C and adriamycin. Serum CEA level was decreased less than 50% of pre-TAE level 20 out of 32 (61%). The tumor size was regressed in 25% of TAE cases which were evaluated on the basis of CT scan. Abdominal symptoms including abdominal pain, nausea and vomiting and fever, leukocytosis, elevated GOT, LDH and bilirubin level were seen after TAE therapy. Median survival of H1, H2 and H3 cases were 21 months, 8 months and 4.5 months, respectively. Another 21 cases (H1, 5 cases: H2, 3 cases: H3, 13 cases) of liver metastasis of colo-rectal cancers were treated with selective hepatic arterial infusion therapy using totally implantable reservoir. Reservoir catheters were implanted into hepatic artery via gastroduodenal artery under direct vision at laparotomy. Mitomycin C, adriamycin and fluorouracil (5-FU) were used as chemotherapeutic agents. No particular side effect such as leukopenia or liver dysfunction was noted. Median survival of H1, H2 and H3 cases treated with arterial infusion were 4 months, 9 months and 9 months, respectively. Median survival of TAE cases and arterial infusion cases was 10 and 6 months, respectively. Thus, the survival rate of cases treated with TAE was better than that of cases treated with arterial infusion.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1987

Stimulation by EGF of the growth of EGF receptor-hyperproducing tumor cells in athymic mice.

EGF receptor-hyperproducing cells of squamous carcinoma origin were inoculated s.c. into the bilatero-abdominal regions of athymic mice and a mini-osmotic pump containing EGF was implanted on teh back. After 2 weeks the tumors formed from 5 different cell lines in the presence of EGF weighed 3 to 6 times more than those formed in the absence of EGF. The cells recovered from these tumors maintained their original characteristics such as the amplified EGF receptor gene, high numbers of EGF receptors and a sensitivity to EGF-mediated inhibition of growth in vitro. These results suggest that EGF plays an important role in promoting growth of squamous-cell carcinoma in vivo.

Animals↗
PubMed1987

High incidence of EGF receptor hyperproduction in esophageal squamous-cell carcinomas.

EGF receptor levels were investigated in esophageal squamous-cell carcinoma tissues from 31 patients. Twenty-two (71%) of these cancer tissues exhibited significantly higher 125I-EGF binding activity than normal mucosa in the adjacent non-cancerous tissues. These EGF receptor levels were then compared on the basis of pathological findings including lymph-node metastasis, depth of invasion, differentiation type, vascular invasion, infiltration and location of the lesion. Unlike previous reports on breast and bladder cancers, our study showed no obvious correlation between these pathological characteristics and the EGF receptor levels in esophageal carcinomas. Immunohistochemical staining with the anti-EGF receptor monoclonal antibody detected EGF receptors in squamous cells of the cancer tissues as well as in the basal cells of nearby normal epithelium. Since the basal cells have proliferative potential in the esophagus, the increase in EGF receptor levels in these cells may possibly be associated with the development of human esophageal squamous-cell cancer.

Carcinoma, Squamous Cell↗
PubMed1987

Phase I study of recombinant human tumor necrosis factor.

A phase I clinical and pharmacokinetic study of recombinant human tumor necrosis factor (rH-TNF) was conducted in a single dose schedule in 33 patients with advanced cancer. rH-TNF was given by i.v. infusion over 30 min with a starting dose of 1 x 10(5) units/m2. The dose was escalated up to 16 x 10(5) units/m2 according to the modified Fibonacci scheme. Toxic effects were similar but not identical to those reported with interferons and interleukin-2, and included fever, rigors, nausea and vomiting and anorexia in a non-dose-dependent manner, and hypotension, leukocytosis, thrombocytopenia and transient elevation of transaminases (SGOT and SGPT) in an approximately dose-dependent manner. DIC syndrome was observed in one patient who had received 16 x 10(5) units/m2. The dose-limiting toxicities were hypotension, thrombocytopenia and hepatotoxicity, and the maximum tolerated dose in a single i.v. infusion of rH-TNF appeared to be 12 x 10(5) units/m2 when thrombocytopenia and elevation of SGOT and SGPT were taken as the dose-limiting toxicities. However, if hypotension was included, the maximum safely tolerated dose appeared to be 5 x 10(5) units/m2.

Adult↗
PubMed1987

Cell kinetic analysis of human tumor xenografts using anti-bromodeoxyuridine monoclonal antibody.

The cell kinetics of human tumor xenografts serially transplanted into nude mice was examined using bromodeoxyuridine (BrdU) and anti-BrdU monoclonal antibody. After various doses of BrdU were given intraperitoneally into tumor bearing nude mice, the tumors were resected and stained immunohistochemically, using the anti-BrdU monoclonal antibody. The number of stained cells was demonstrated as the labeling index (LI). The optimal condition for BrdU staining was assumed to be 300 mg of BrdU per kg followed by an incubation period of one hour. Since the LI by BrdU closely correlated with that in autoradiography by 3H-TdR, this method is more useful and safer than the conventional autoradiographic study for investigating clinical cell kinetic analysis, as there is no need to use potentially hazardous radioactive compounds and the period of assay is shorter.

Animals↗
PubMed1987

Two cases of rectal carcinoma associating aorto-iliac occlusive disease.

Two cases of rectal carcinoma associating aorto-iliac occlusive disease are presented. These two cases had complete obstruction of the affected vessels, but many collateral pathways from the aorta to the legs had developed, mainly through the superior rectal artery or parietal vessels. Changes in blood flow to the legs, following the radical operation for rectal carcinoma, were examined by both preoperative angiography and perioperative Doppler flow meter. Vascular reconstruction was carried out in one case prior to resection of the rectum, in order to prevent the ischemic legs from becoming worse, or necrotic. The indications for supportive vascular surgery in the case of rectal carcinoma with aorto-iliac occlusive disease are discussed herein.

Adenocarcinoma↗
PubMed1987

The expression of stage-specific embryonic antigen 1 in the noncancerous colorectal epithelia of familial polyposis coli.

The epithelial expression of carbohydrate antigen, stage-specific embryonic antigen 1 (SSEA-1) was examined immunohistochemically in noncancerous specimens from patients with familial polyposis coli, and compared with the colorectal epithelia from patients with sporadic colorectal cancer. In mucosa remote from carcinoma of sporadic cases, SSEA-1 was expressed only faintly in the lower crypts. In mucosa adjacent to carcinoma of sporadic cases, SSEA-1 was expressed not only in the lower crypts but also in the upper crypts. These results corresponded to those observed in the authors' previous study. In the flat mucosa of familial polyposis coli cases, SSEA-1 was detected not only in the lower crypts, but also in both upper crypts and the surface epithelium in contrast with the flat mucosa of sporadic cases. The staining pattern in the upper crypts of the flat mucosa of familial polyposis coli cases was very similar to that of the mucosa adjacent to carcinoma of sporadic cases, but was stronger and more diffuse in the surface epithelium. In microscopic adenomas, SSEA-1 was expressed diffusely. These results demonstrate that the flat mucosa of patients with familial polyposis coli shows preneoplastic changes similar to those in the mucosa adjacent to carcinoma of sporadic cases, and that SSEA-1 is related to adenoma formation in the early stage of carcinogenesis in the colorectum. In addition, the results suggest that immunohistochemical studies of flat mucosa may be useful for the early detection of high-risk individuals in a familial polyposis coli family.

Cell Transformation, Neoplastic↗
PubMed1987

Clinical analysis of multiple organ failure in burned patients.

Severely burned patients often show various degrees of organ failures, and when several vital organs are involved mortality becomes extremely high. A study was undertaken to elucidate the aetiology and clinical significance of multiple organ failure (MOF) in burned patients. One hundred and fifty-eight burned patients were analysed for organ failures in five vital organs or systems, the heart, lung, liver, kidney and blood clotting system. There were 91 organ failures observed in 34 patients, of which 26 had MOF. The most frequently affected organ was the lung, followed by the heart, kidney, liver and the blood clotting system. The mortality rate was 76.9 per cent in MOF and 1.5 per cent in non-MOF patients. Septicaemia was closely associated with the development of MOF. Also, inhalation injury and 'shock' were contributing factors to the morbidity. Five extensively burned patients had an early development of MOF without infectious foci and this type of early MOF was attributed to endotoxaemia possibly originating from the patient's own intestinal flora.

Adolescent↗
PubMed1987

[Clinical study of the NCC-ST-439 EIA kit using serum from patients with various types of cancer and benign disease (1)].

The amounts of antigens in the serum of patients with various types of cancer and benign diseases were measured in order to clinically evaluate the NCC-ST-439 EIA kit. From the results of measurements in 583 healthy persons, cut-off values of 4.5 U/ml for males and females 50 years or older and 7.0 U/ml for females 49 or younger were set. The false-positive rate for healthy persons at this time was 5.0%. The positive rates for malignant tumors at these cut-off values were 58.9% for pancreatic carcinoma, 53.1% for cholangiocarcinoma, 41.9% for mammary carcinoma, 36.6% for rectal and colonic carcinoma, 33.3% for hepatocellular carcinoma and 35.3% for carcinoma as a whole. The false-positive rates for benign diseases were 14.0% for pancreatic disease, 9.7% for liver disease, 8.0% for biliary duct disease and 8.3% for benign diseases as a whole. These rates were low when compared with those for other tumor markers. These results showed that NCC-ST-439 is a tumor marker with a high degree of specificity.

Adolescent↗
PubMed1987

[Clinical study of the NCC-ST-439 EIA kit using serum from patients with various types of cancer and benign disease (2)].

The positive rates for NCC-ST-439 in cases where other tumor markers were negative were 16.8% for CA19-9-negative cancer cases and 23.5% for CEA-negative cancer cases. The positive rates obtained using a combination of these three markers were 86% for pancreatic and cholangiocarcinomas, and at least 65% for hepatocellular, rectal and colonic and mammary carcinomas. The following combinations of tumor markers were the best from the standpoint of diagnostic efficiency: NCC-ST-439 + CA19-9 for pancreatic carcinoma, NCC-ST-439 + AFP for hepatocellular carcinoma, and NCC-ST-439 + CEA for rectal and colonic carcinoma. In cases which were positive preoperatively, 83.3% became negative after curative surgery, which reflected the clinical course very well. These results indicate that NCC-ST-439 improves the diagnostic rate in combination with other tumor markers because of its high specificity, and it was evaluated as useful for the monitoring of therapeutic effects.

Adolescent↗
PubMed1987

[Phase II study of peplomycin in breast cancer. A cooperative study. Clinical Study Group of Peplomycin for Breast Cancer in Japan].

A phase II study of peplomycin, an analogue of bleomycin, was carried out in 42 patients with advanced or recurrent breast cancer by a cooperative group consisting of 15 institutes throughout Japan, and the following results were obtained. Among the 42 patients, 38 were evaluable, in whom the overall response rate was 7.9% (3/38). For the various histologic types, the response rate was 33.3% (2/6) for papillotubular carcinoma and 9.1% (1/11) for medullary tubular carcinoma. The response rate was 33.3% (2/6) in patients without prior treatment and 3.1% (1/32) in those with prior treatment. Side effects of nausea, anorexia, malaise, alopecia and pyrexia occurred frequently, and a decrease in WBC and an increase in GOT were observed temporally. Pulmonary toxicity was observed in 7 patients.

Adult↗
PubMed1987

[Initial basic and clinical evaluation of a solid-phase immunoradiometric assay for sialyl SSEA-1 antigen: 1. Evaluation of assay conditions and normal values].

We describe a solid-phase immunoradiometric sandwich assay method for a new tumor marker, sialyl SSEA-1 (sialyl LeX-i), using RIA kits (prepared by Otsuka Assay Laboratories). The assay required only duplicate 20-microliter samples, and the concentration of sialyl SSEA-1 antigen in serum was determined with reference to a standard curve ranging from 0 to 224 arbitrary unit/ml. The intra- and inter-assay reproducibilities and analytical recovery of antigen were excellent. The cut-off value (38 unit/ml) was obtained as mean + 2SD, which was calculated from the antigen concentration in sera from 1,105 healthy individuals. Also described are the alterations of normal values by age, sex, and Lewis blood group status.

Antigens, Neoplasm↗
PubMed1987

[Initial basic and clinical evaluation of a solid-phase immunoradiometric assay for sialyl SSEA-1 antigen: 2. Evaluation of clinical significance].

The clinical significance of serum sialyl SSEA-1 antigen was evaluated using the sera of 1261 patients with malignant tumors and 717 patients with non-malignant diseases measured with Otsuka Assay Laboratories' RIA Kits. The results indicate that the antigen was frequently elevated in the sera from the patients with various adenocarcinomas, including lung (45%), pancreas (64%) and ovary (57%). The false positive incidence of antigens in the sera from the patients with non-malignant disorders was as low as 4.9%. No correlation was observed with other tumor markers examined in this study, and the diagnostic efficiency increased significantly by the combined determination of sialyl SSEA-1 antigen level with other markers. The serial determination of the serum sialyl SSEA-1 antigen level has a clinical utility also in monitoring the patients with adenocarcinoma receiving surgical operation and/or chemotherapy as indicated by the results of the longitudinal observation of the patients.

Adenocarcinoma↗
PubMed1987

[An operated case of multiple endocrine neoplasia type IIb and review of the Japanese literature].

Multiple endocrine neoplasia, type IIb (MEN IIb) is a rare syndrome characterized by the occurrence of medullary thyroid carcinoma (MTC), pheochromocytoma and mucosal neuroma. A 35-year-old male patient with MEM IIb having megacolon, marfanoid habitus and no family history of the disease underwent surgery. Because MTC was present in both lobes, total thyroidectomy and modified neck dissection were performed. Pheochromocytoma was found bilaterally and bilateral adrenalectomy with adrenal autotransplantation in the rectus abdominis muscle was carried out. Postoperative course was satisfactory except for transient hypocalcemia and mild ileus. After the slow corticosteroid weaning process, his adrenocortical function was at the lower level within a normal range. In August 1986 (24 postoperative months), he was maintained by the administration of 10mg of hydrocortisone every three days, and calcitonin and CEA levels in sera were normal. We collected 15 cases reported in Japanese literatures. MTC and mucosal neuroma were found in all cases, whereas pheochromocytoma was present in 9 cases. Bilateral and multicentric occurrences were usual, and total thyroidectomy and bilateral adrenalectomy were, warranted. We believe that autotransplantation following bilateral adrenalectomy is a worthy alternative.

Adrenal Gland Neoplasms↗