Biomedical subjects

M Noguchi

Publications and source records attributed to M Noguchi.

At least 523 records · Page 29Linked to original sources

PubMed1990

[A case of urachal abscess].

A 26-year-old male with urachal abscess was demonstrated. Ultrasonography, CT and MRI revealed that there was a mass at the supravesical region, which was connected to the umbilicus. However, a differential diagnosis as to whether the mass was a tumor or an abscess was difficult from these examinations. Thus we performed an open biopsy. A pathological examination revealed no malignant change in the biopsy specimen. On the other hand, the pathological diagnosis of a follicular tumor located at the roof of the urinary bladder was TCC G2, but we considered that, this change was a reactive hyperplasia with dysplasia resulting from chronic inflammation of urachal abscess. Thus, the complete excision of urachal abscess and partial cystectomy were performed. The serial sections of the bladder wall revealed no malignant changes. We reviewed similar cases reported in our country and discussed various factors causing urachal abscess, especially related to the infectious root.

Abscess↗

PubMed1990

Effects of L-2-oxothiazolidine-4-carboxylate, a cysteine pro-drug, on teratogenicity of 5-fluorouracil in mice.

Embryotoxicity and teratogenicity of 5-fluorouracil (5-FU) and modulation of its effect by L-2-oxothiazolidine-4-carboxylate (OTC), a cysteine pro-drug, were evaluated in mice. Pregnant ICR mice were intraperitoneally (i.p.) injected with 25 mg/kg of 5-FU on day 11 of gestation (vaginal plug = day 0). Mice were pretreated i.p. with 950 mg/kg of OTC 4 hours before dosing with 5-FU. Dams were killed on day 17 of gestation. Fetuses were examined for external malformations, especially limb malformations. Pretreatment with OTC decreased the frequency and severity of oligodactyly induced by 5-FU, although the differences were not significant statistically. There was little difference in either liver glutathione levels, or body weight gain during gestation of dams between the 5-FU group and the 5-FU plus OTC group. Fetal mortality and fetal weight of the group treated with 5-FU alone were comparable with those of the group pretreated with OTC. In the present study, teratogenicity of 5-FU seemed to be slightly mitigated with OTC pretreatment.

Animals↗

PubMed1990

[Effects of maternal exercise using bicycle ergometer on maternal heart rate, blood pressure, oxygen consumption and fetal heart rate].

The effects of maternal exercise on pregnant women and fetal well-being are largely unknown. Forty-eight pregnant women between 16 and 39 weeks' gestation were exercised on a bicycle ergometer. We studied the oxygen consumption, blood pressure, maternal and fetal heart rate (FHR) at rest, during and after the exercise. The mean maternal heart rate and blood pressure were increased to 166.1 +/- 12.2/min (mean +/- S.D., n = 48) and 161.1 +/- 20.1/82.7 +/- 15.2 mmHg, respectively, at maximal exercise. The absolute oxygen consumption (1/min) was increased with advancing pregnancy at rest and maximal exercise, but the functional oxygen consumption (ml/kg/min) was not changed during pregnancy. The mean FHR was increased about 4 and 9 bpm in the 2nd and 3rd trimesters, respectively. Abnormal FHR patterns after the exercise were observed in 8 cases (16.7%), mild tachycardia: 6 cases, deceleration: 2 cases. Increasing the maternal heart rate at maximal exercise, increased the frequency of the abnormal FHR pattern. When the maternal heart rate was below 160/min, there was no abnormal FHR pattern. These results suggest that several medical checks should be done not only for the mother but also for her fetus during exercise and the maternal heart rate should not exceed 160/min.

Blood Pressure↗

PubMed1990

[Long-term follow-up results of TUL (transurethral ureterolithotripsy)].

We experienced 112 cases of urolithiasis treated with transurethral ureterolithotripsy (TUL) between December, 1985 and September, 1988. We analyzed 35 patients treated with TUL and who had come to our hospital to be examined by cystography, renal ultrasonography, plain X-ray, and urinalysis more than 3 months later. The follow-up term ranged from 3 to 30 months after TUL. The patients were treated using a 12Fr Stortz rigid lithotripter or flexible uretero-fiberscope with electrohydraulic lithotripter. Urinalysis, kidney-ureter-bladder X-ray (KUB), ultra-sonography and cystogram were the main disciplines for follow-up. Urinalysis revealed 4 cases of hematuria, 3 cases of hematopyuria and 2 cases of pyuria. KUB showed no newly formed stones, but 2 cases of ureteral stones had moved from the kidneys. Renal ultrasonography demonstrated no hydronephrosis of operated side, except for 1 case of mild hydronephrosis, who had had severe hydronephrosis preoperatively. We searched for vesicoureteral reflux (VUR) in 34 of the long-term follow-up patients after TUL, but no VUR was seen on their cystograms. No significant late complications of TUL were observed. No harmful effects of ureteral dilation during transureteral operation were found even in long-term follow-up patients.

Adult↗

PubMed1990

[Relation between blood coagulability and prognosis in patients with ovarian cancer].

In 13 patients with ovarian cancer who had been treated with remission induction chemotherapy, we measured the levels of platelet PT, APTT, Hepa T, ATIII, alpha 2PI and FDP, and we also measured such molecular markers as fibrinopeptide A(FPA), fibrinopeptide B beta 1-42(FPB beta 1-42), and fibrinopeptide B beta 15-42 (FPB beta 15-42) before and after chemotherapy. Then the relation between the post chemotherapeutic trends of these substances and the prognosis for patient with ovarian cancer were investigated. 1) After chemotherapy, the levels of fibrinogen were increased, ATIII was decreased significantly in cases in the NC.PD group compared with the PR.CR group (p less than 0.05). The alpha 2PI concentrations were also slightly low, and the levels of FDP were within the normal range in cases in the PR.CR group, but in many cases in the NC.PD group were increased. 2) After chemotherapy, the concentrations of molecular markers (FPA, FPB beta 1-42 and FPB beta 15-42) were increased significantly in cases in the NC.PD group compared with the PR.CR group (p less than 0.05). 3) In cases in the recurrent group, the levels of ATIII and alpha 2PI were decreased significantly compared with the after therapy group, FDP, FPB beta 1-42 and FPB beta 15-42 were increased. Accordingly, the recovery of hemostatic balance with effective chemotherapy is related to the prognosis for patients with ovarian cancer, and the levels of fibrinogen, PT, alpha 2PI, ATIII, FDP, FPA, FPB beta 1-42 and FPB beta 15-42 may be able to be used in the prognosis for patients after chemotherapy.

Adolescent↗

PubMed1990

Clonal growth of atypical adenomatous hyperplasia of the lung: cytofluorometric analysis of nuclear DNA content.

The nuclear DNA content of 13 cases of atypical adenomatous hyperplasia (AAH) associated with adenocarcinoma, eight cases of small-sized well differentiated adenocarcinoma in which the tumors were less than 2.5 cm in size with no tumor recurrence within 5 yr after surgery, and eight cases of reactive type 2 pneumocyte hyperplasia of the lung was determined by cytofluorometry. Of the AAHs, four were solitary and composed entirely of cells of AAH (Group 1), and the remaining nine were in continuity with the focus of adenocarcinoma (Group 2). The average mean nuclear DNA content of the AAHs was significantly greater than that of reactive type 2 pneumocyte hyperplasia (p less than 0.005) and significantly smaller than that of adenocarcinoma associated with AAH (p less than 0.05). However, no significant difference was found in nuclear DNA content between AAH and small-sized well differentiated adenocarcinoma. Aneuploid stem lines were found in seven of the 13 (53.8%) AAHs, ten of the 13 (76.9%) adenocarcinomas associated with AAH, and five of the eight (62.5%) small-sized well differentiated adenocarcinomas but in none of the reactive type 2 pneumocyte hyperplasias. DNA histogram patterns I and II, in which aneuploid cells were less frequently present than in patterns III and IV, were more common in AAH than in adenocarcinoma associated with AAH and small-sized well differentiated adenocarcinoma. All of the reactive type 2 pneumocyte hyperplasia showed pattern I. As to the average mean nuclear DNA content, incidence of aneuploid stem lines, and DNA histogram pattern, there was no significant difference between groups 1 and 2 of the AAHs.(ABSTRACT TRUNCATED AT 250 WORDS)

Adenocarcinoma↗

PubMed1990

[A multivariate analysis of en bloc extended radical mastectomy versus conventional radical mastectomy in operable breast cancer].

We made clinical trials of en bloc extended radical mastectomy (EXT) of a new type in 118 patients from 1980 through 1985. Conventional radical mastectomies (RDL) were also performed in 105 patients from 1973 through 1985. A multivariate analysis was performed to compare the results of EXT and RDL. As the result, the 5-year survival rates of 91 +/- 2.6% and 83 +/- 3.7% were achieved for the EXT and RDL groups, respectively (Cox P value for comparison of survival curves = 0.16). Adjusted Cox regression analysis revealed a significantly favorable result of EXT (P = 0.03). This difference was most remarkable in patients with one to three metastatic axillary lymph nodes, although it was not statistically significant because of too small number of patients available (P = 0.18). The results are thus not definite, but suggest that EXT may be advantageous over RDL especially in patients with a few metastatic axillary lymph nodes.

Adult↗

PubMed1989

[Thin-slice CT analysis of localized inflammatory pulmonary lesions--pathologic-CT correlation].

In order to evaluate thin-slice CT findings of localized inflammatory pulmonary lesions, 5 granulomatous lesions without preoperative pathological diagnosis were examined. On thin-slice CT, fifth order bronchi and vessels were detected, and inflammatory lesions were observed in margins of pulmonary veins. Of involved bronchi, thick walls were detected in 3 cases, central convergence in 2 cases, mucoid impaction in 3 cases. The characteristics of inflammatory nodules, strand-like shadow and concave margin of lesion contiguous to normal lung, were demonstrated on thin-slice CT. Thin-slice CT can be effective to differentiate localized inflammatory pulmonary lesion.

Aged↗

PubMed1989

Amplification of protooncogenes in surgical specimens of human lung carcinomas.

The possible existence of amplification or rearrangement of protooncogenes was examined in more than 100 surgical specimens of human lung carcinoma. Protooncogenes were amplified in 28% of the carcinomas. About 90% of the amplified genes were of the myc, ras, or erbB family. Of the myc family genes, myc was amplified in 14 of 137 tumors and L-myc in four of 108 tumors, but N-myc was not amplified. A high frequency of amplification of myc was observed in squamous cell carcinomas (seven of 37) and of L-myc in small cell carcinomas (two of six). Of the ras family genes, K-ras-2 was amplified in six of the 137 tumors and N-ras in two of the 137 tumors, but no amplification of H-ras-1 was detected. Seven of the eight cases of amplified ras genes were in advanced pathological stages. Of the erbB family genes, erbB-1 (epidermal growth factor receptor) was amplified in 10 of 114 tumors and erbB-2 (HER-2/neu) in one of 51 tumors. Amplifications of the myc, ras, and erbB family genes might be one of the crucial DNA abnormalities involved in the development of human lung carcinomas.

DNA, Neoplasm↗

PubMed1989

DNA cytofluorometric and nuclear morphometric analyses of lung adenocarcinoma.

The nuclear DNA content of tumor cells in imprint smears prepared from 72 surgically resected adenocarcinomas of the lung was determined prospectively by means of cytofluorometry, and its relationship to pathologic stage, degree of histologic differentiation, and nuclear atypia represented by the mean nuclear area (MNA) and standard deviation of the nuclear area (SDNA) was studied. The mean nuclear DNA content (MNDC) of poorly differentiated adenocarcinomas was significantly larger than that of well-differentiated adenocarcinomas both in Stages I + II and III + IV (P less than 0.001, each), and the MNDC of Stages III + IV was significantly larger than that of I + II in poorly differentiated adenocarcinomas (P less than 0.01). There was a tendency for histogram Patterns III and IV, in which more aneuploid cells were present than in I and II, to be more common and for the incidence of the aneuploid stem cell line to be higher in less differentiated and more advanced adenocarcinomas, although the differences were not significant statistically. Furthermore, there were significant positive correlations between MNDC and MNA (P less than 0.01) and between MNDC and SDNA (P less than 0.05). The averages of the MNA according to the histogram pattern increased significantly in the increasing order of Patterns I to IV. These results indicate that the nuclear DNA content increases in less differentiated and more advanced adenocarcinomas, and that the nuclear atypia is reflected in abnormal nuclear DNA content (DNA aneuploidy).

Adenocarcinoma↗

PubMed1989

CD4+ cytolytic T cell clones restricted to HLA class II, DR beta I, and DR beta III chains.

We have investigated the functional polymorphism of HLA class II antigens using CD4+ CTL clones. Seven CD4+ CTL clones were isolated from a healthy donor (HLA A2 A24; B8 B27; DRw17 DRw52a) by repeated stimulation with irradiated autologous EBV-transformed B cell lines (EBV-B). According to the HLA restriction specificity we divided CD4+ CTL clones into three subgroups: (i) DRw17-restricted CD4+ CTL clones; (ii) DRw52a-restricted CD4+ CTL clones; and (iii) the CD4+ CTL clones, of which the restriction specificity could not be assigned to products of a single HLA locus. Interestingly, DRw17-restricted CD4+ CTL clones distinguished between DRw17 and DRw18. Similarly, DRw52a-restricted CD4+ CTL clones distinguished between DRw52a, w52b, and w52c. There are four amino acids which differ between DRw17 and DRw18, whereas five differ between DRw52a and the other two alleles (DRw52b and DRw52c). The recent elucidation of the crystal structure of a human class I MHC molecule has identified the probable peptide binding site to be a cleft on the outer surface of the molecule, between two alpha-helices. On the basis of the theoretical model for HLA class II molecules, amino acid positions 26 and 28 (DRw17 vs DRw18) and amino acid positions 26, 28, and 74 (DRw52a vs the other two alleles) lie within the "cleft." We propose that amino acid positions 26 and 28 are very important sites with regard to the recognition of antigen-MHC complex by the TCR.

Binding, Competitive↗

PubMed1989

Concordant deletions of chromosome 3p and loss of heterozygosity for chromosomes 13 and 17 in small cell lung carcinoma.

Common regions of loss of heterozygosity on chromosomes 3, 13, and 17 were determined by restriction fragment length polymorphism analysis in 34 tumors and nine cell lines from 27 patients with small cell lung carcinoma. The common regions of loss of heterozygosity on chromosomes 3, 13, and 17 reside between D3S2 (3p14-p21) and ERBA beta (3p22-p24.1), between D13S1 (13q12) and D13S2 (13q22), and distal to MYH2 (17p13.1), respectively. Allele loss in each of these regions has been previously shown in several human tumors. Thus, the present findings indicate the pleiotropy of recessive genetic lesions in these genomic areas. Cytogenetic analysis was performed on three small cell lung carcinoma cell lines which had allele loss on all three chromosomes, and although chromosome 3p deletions were observed in two of three cell lines, no obvious structural abnormalities involving chromosomes 13 and 17 were detected. Mitotic recombination or mitotic nondisjunction rather than deletion may thus be the frequent chromosomal mechanism for attaining homozygosity of chromosomes 13 and 17 in small cell lung carcinoma.

Alleles↗

PubMed1989

Correlation between antigenic and functional expression of tissue factor on the surface of cultured human endothelial cells following stimulation by lipopolysaccharide endotoxin.

Previous studies indicated that E. coli lipopolysaccharide (LPS) induces human umbilical vein endothelial cells (HUVEC) to express tissue factor activity. Using a radiolabeled anti-tissue factor monoclonal antibody to assess cell-surface tissue factor apoprotein antigen and a two-stage amidolytic assay to assess functional tissue factor activity, we have investigated the temporal relationship between antigenic expression and functional expression of tissue factor on the surface of LPS-stimulated HUVEC. Maximum tissue factor apoprotein antigenic expression on the surface of LPS-stimulated HUVEC was achieved in four hours after LPS treatment, while maximum functional tissue factor activity occurred after 6 hours. Specific binding of radiolabelled human factor VIIa to LPS-stimulated HUVEC paralleled the time course of the expression of tissue factor functional activity. Thus, these data indicate that the presence of of newly-synthesized tissue factor apoprotein antigen on the cell surface is insufficient by itself for maximal factor VIIa binding to occur, and provide presumptive evidence for the posttranslational processing of tissue factor apoprotein on the cell surface prior to its acquisition of ligand binding function.

Antibody Formation↗

PubMed1989

Expression of human 5-lipoxygenase cDNA in Escherichia coli.

A cDNA for human 5-lipoxygenase (5LO) was inserted into the vector pKC (constructed from pKK223-3 by replacing its replication origin with that of pUC18) and expressed in Escherichia coli. The enzyme expressed was purified to homogeneity from the cellular soluble fraction. The purified enzyme showed both 5LO and leukotriene A4 synthase activities, which were stimulated by Ca2+ and ATP. Its molecular mass (78 kDa) and NH2-terminal sequence were identical with those of 5LO purified from human leukocytes. The availability of the expression system will facilitate further studies on its regulation and the reaction mechanism of the enzyme.

Adenosine Triphosphate↗

PubMed1989

Evaluation of the prognosis for small hepatocellular carcinoma based on tumor volume doubling time. A preliminary report.

The relationship of tumor volume doubling time to length of patient survival was investigated for 15 patients with small hepatocellular carcinoma smaller than 4.5 cm in diameter. The mean tumor volume doubling time of these 15 nodules was 102 +/- 77 days (mean +/- SD; range 41 to 305 days) before the initiation of a specific treatment for cancer. These doubling times tended to correlate with mitotic indexes of the tumors and the patients could be divided into two groups according to the therapeutic modalities used. Patients in Group A received systemic chemotherapy without response or nonspecific treatments for cancer. In this group, there was a positive correlation between tumor volume doubling time and survival length (r = 0.8812; P less than 0.025). Patients in Group B either received hepatectomy after transarterial embolization or systemic chemotherapy or received hepatectomy alone. In this group, early death occurred in patients who had shorter tumor volume doubling times. Three surgically treated patients in Group B were evaluated as having survived for a significantly long period as assessed from their tumor volume doubling times. These results indicate that tumor volume doubling time is one of the determining factors of survival length in patients with hepatocellular carcinoma, and, therefore, can be used in the evaluation of therapeutic efficacy.

Aged↗

PubMed1989

[Clinical analysis of 26 cases of multiple primary cancer].

Of 412 head and neck cancers in the Department of oral Surgery, Sapporo Medical College from 1976 to 1987, 26 cases (6.3%) were multiple primary cancers. One of these cases was triple cancer. The ages of these 26 cases ranged from 42 to 81 (average 61 year-old) with 20 males and 6 females (3.3:1). As to the interval between the first and second cancer, five cases (20%) were synchronous and twenty cases (80%) were metachronous in our series. Of the five synchronous, three were found by careful examination at the time of admission to our department. The stomach and head and neck cancers were frequently observed as the first cancer of metachronous cases. Second primary cancers occurred in the head and neck region were 64% and those in other regions were 36%. On the other hand, digestive cancer was predominant in the additional cancer to the index cancer (66.7%). These numbers emphasize that patients with head and neck cancers are in a cancer-prone group that develops digestive cancers. These findings have important implications in follow up policy.

Adenocarcinoma↗

PubMed1989

[Effect of remission induction chemotherapy on blood coagulability in patients with gynecological malignancies].

In 12 patients (38 courses) with gynecological malignancies who had been treated with remission induction chemotherapy, we measured the levels of ESR, Platelet, PT, APTT, Hepa T, AT III, alpha 2 PI, FDP and D-dimer, and we also measured such molecular markers as Fibrinopeptide A (FPA), Fibrinopeptide B beta 1-42 (FPB beta 1-42), and Fibrinopeptide B beta 15-42 (FPB beta 15-42) before and after chemotherapy. Then the relation between the post chemotherapeutic trends and prognosis for patient with gynecological malignancies were investigated. 1) Before chemotherapy, the levels of ESR, FDP, D-dimer and FPB beta 1-42 were increased, PT and APTT were shortened significantly in cases on groups IIIrd and IVth stage compared with in cases on groups Ist and IInd stage (p less than 0.05). The levels of FPA were also high, but there was no significant differences. The levels of FPB beta 15-42 were almost same in both groups. However, the each markers indicated the existence of chronic DIC in cases of group IIIrd and IVth stage. 2) One week after chemotherapy, the levels of ESR, fibrinogen, FDP and FPA were decreased, while FPB beta 1-42 and FPB beta 15-42 were increased, suggesting elevated fibrinolytic activity. Two weeks after chemotherapy, there was stronger tendency to coagulation dominant again, but it was only temporary. Three weeks after chemotherapy, the hemostatic balance was regained. 3) In patient with complete remission after effective chemotherapy, their coagulability data were showed within normal range, however, some cases with poor prognosis were not able to obtain the recovery of hemostatic balance, and the levels of molecular markers were significantly elevated. Coagulative activity was more enhanced than fibrinolytic activity in patients with progressive gynecological malignancies, but hemostatic balance was maintained clinically. The hemostatic balance was disrupted by the chemotherapy, but this balance was regained for the IIIrd week. Accordingly, the recovery of hemostatic balance with effective chemotherapy is related to the prognosis for patients with gynecological malignancies, and the levels of molecular markers may be able to expect the prognosis for patients.

Adult↗

PubMed1989

Cadherin cell-adhesion molecules in human epithelial tissues and carcinomas.

Two distinct calcium-sensitive cell-cell adhesion molecules were identified in human epithelial tissues and carcinomas using two monoclonal antibodies raised against vulvar epidermoid carcinoma A-431 and human mammary carcinoma MCF-7 and selected on the basis of their activities to disrupt cell-cell adhesion. In immunoblot analysis, these antibodies, designated NCC-CAD-299 and HECD-1, detected main bands of Mr 118,000 and 124,000, respectively. Purified tryptic fragments of the antigen recognized by NCC-CAD-299 showed cross-reactivity with a rabbit antiserum against mouse P-cadherin, indicating that this molecule was the human homologue of P-cadherin. On the other hand, the antigen recognized by HECD-1 showed essentially the same tissue distribution pattern as E-cadherin in the mouse, suggesting that this molecule is the human homologue of E-cadherin. Availability of these monoclonal antibodies to human P- and E-cadherin allowed us to examine their distributions in human tissues immunohistochemically. Both antigens were detected in epithelial tissues, but they showed distributions that were distinct from each other. The antigen recognized by HECD-1 was expressed in almost all epithelial tissues, while distribution of the other one recognized by NCC-CAD-299 was restricted to the basal or lower layers of stratified epithelia in which both antigens were coexpressed. Moreover, immunohistochemical examination of 44 lung carcinomas showed that both molecules were coexpressed in all of them, and suggested that expression of P-cadherin was closely related to the differentiation of carcinoma cells.

Antibodies, Monoclonal↗