Studies on inhibitors of skin tumor promotion, III. Inhibitory effects of isoflavonoids from Wisteria brachybotrys on Epstein-Barr virus activation.
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Antigens, Viral↗
Biomedical subjects
M Tanabe
Publications and source records attributed to M Tanabe.
Studies on inhibitors of skin tumor promotion, IX. Neolignans from Magnolia officinalis.
Three neolignans, known as magnolol [1], honokiol [2] and the new monoterpenylmagnolol [3], were isolated from the bark of Magnolia officinalis as inhibitors of Epstein-Barr virus early antigen (EBV-EA) activation induced by 12-O-tetradecanoylphorbol-13-acetate (TPA). The structure of 3 was determined from 2D nmr spectral data and difference nOe experiments. The MeOH extract of this plant and magnolol exhibited remarkable inhibitory effects on mouse skin tumor promotion in an in vivo two stage carcinogenesis test. This investigation indicates that these neolignans and the extract might be valuable antitumor promoters.
Animals↗
Induced immunity by expression of interleukin-2 or GM-CSF gene in murine neuroblastoma cells can generate antitumor response to established tumors.
We examined whether antitumor immunity could be generated by the inoculation of cytokine-producing murine neuroblastoma cells (C1300), and whether the immunity might be effective for the established tumors of wild-type (wt) cells. For that purpose, we transduced low immunogenic C1300 cells with interleukin-2 (IL-2), GM-CSF, or IL-4 genes. A loss of tumorigenicity in syngeneic mice was observed using IL-2- and GM-CSF- but not IL-4-producing C1300 cells, although their in vitro growth rates were not affected by the transduction. The syngeneic mice that had rejected IL-2 or GM-CSF producers did not develop tumors of wt cells inoculated subsequently, but formed tumors of irrelevant syngeneic mammary tumor cells. Accordingly, the inoculation of IL-2 or GM-CSF producers into immunocompetent mice generated tumor-specific acquired immunity. The induced immunity using IL-2 or GM-CSF producers was also effective in eradicating established subcutaneous tumors of wt cells and in reducing the number of preexisting metastatic foci in the liver. These data suggest a potential application of IL-2- or GM-CSF-producing syngeneic tumor cells for the treatment of low immunogenic neuroblastomas.
Animals↗
Endometrial carcinoma coexisting with pregnancy, presumed to derive from adenomyosis: a case report.
Endometrial carcinoma coexisting with pregnancy is rarely observed. We report here the case of a 35-year-old woman with an endometrial carcinoma that was diagnosed 6 months after childbirth. Preoperative magnetic resonance imaging (MRI) revealed a cystic mass attached to the uterus, with a papillary projection on the wall of the mass. The patient underwent complete surgical extirpation and five postoperative courses of adjuvant chemotherapy, given that the tumor contents had leaked into the peritoneal cavity when the capsule of the tumor ruptured intraoperatively. Microscopic examination revealed an endometrioid adenocarcinoma in the muscular layer close to the uterine serosa that was presumed to derive from adenomyosis. Further investigation is required to elucidate the pathogenesis of endometrial carcinoma in association with pregnancy and adenomyosis.
Adenocarcinoma↗
Cultured epithelial autografting on meshed skin graft scars: evaluation of skin elasticity.
Many patients with meshed skin graft scars complain of the scars' unsightly appearance and hardness. Since 1989 we have shaved away meshed skin graft scars and then resurfaced the area with autologous cultured epithelium in nine patients. This method improved the disfigurement of meshed skin graft scars, with minimal sacrifice of normal donor skin. Furthermore, autologous cultured epithelium grafted areas had high skin elasticity compared with meshed skin graft scars, as measured with a noninvasive suction device.
Adolescent↗
CT diagnosis of periureteric venous ring.
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Adult↗
Bronchioloalveolar carcinoma with widespread ground-glass shadow on CT in two cases.
Two cases of bronchioloalveolar carcinomas are presented. In both cases, chest CT demonstrated widespread ground-glass shadows. The findings on CT revealed tumor tissue character with tumor cell proliferation along the alveolar wall and air in the alveoli.
Adenocarcinoma, Bronchiolo-Alveolar↗
Effect of 2-phenylaminoadenosine (CV-1808) on ischemic ST-segment elevation in anesthetized dogs.
The effect of 2-phenylaminoadenosine (CV-1808) against myocardial ischemia was studied in anesthetized dogs. During intravenous infusion of CV-1808 (0.25 and 0.5 microgram/kg/min for 10 min) the ST-segment elevation in the epicardial ECG induced by a 5-min occlusion of a coronary arterial branch was occasionally enhanced in association with cardiac acceleration. In a dose of 0.5 microgram/kg/min, the agent inhibited the ST elevation 30 and 60 min after administration. The same dose did not change myocardial blood flow in the ischemic area despite significant systemic hypotension. In hearts with continuous coronary occlusion, CV-1808 (0.3 and 1.0 microgram/kg, i.v. bolus) increased the retrograde blood flow from the ischemic area immediately after administration, suggesting a collateral vasodilating action. Nifedipine (0.5 and 2.5 microgram/kg/min, i.v. for 10 min) and nitroglycerin (0.5 and 5.0 microgram/kg/min, i.v. for 10 min) had no influence on the ischemic ST-segment elevation, while a significant inhibition was seen with propranolol (0.5 mg/kg, i.v.). A moderate hypotension was induced by CV-1808, nifedipine, and nitroglycerin, while a significant reduction in cardiac function was seen after dosing with propranolol.
Adenosine↗
Inhibition of coronary circulatory failure and thromboxane A2 release during coronary occlusion and reperfusion by 2-phenylaminoadenosine (CV-1808) in anesthetized dogs.
The effects of potent coronary vasodilator, 2- phenylaminoadenosine (CV-1808), on coronary circulatory failure and thromboxane (TX) A2 release were studied during coronary occlusion (for 60 min) and subsequent reperfusion (for 60 min) in anesthetized dogs. During coronary reperfusion, reactive hyperemic response was attenuated, and coronary conductance decreased gradually with time, suggesting coronary circulatory failure. TXA2 release was markedly increased, as demonstrated by contraction of rabbit aortic strips perfused with coronary venous blood draining the ischemic myocardium, and by increased release of radioimmunologically assayable TXB2. CV-1808 (0.25 microgram/kg/min i.v. infusion throughout the experimental period, starting 10 min before coronary occlusion) inhibited coronary circulatory failure and TXA2 release. TXA2 synthetase of horse platelet microsomes was not significantly inhibited (-11.6 +/- 2.1%) by 10(-4) M CV-1808. The compound (10(-5) and 10(-4) M) inhibited collagen-induced TXB2 formation in a dose-dependent manner (-23.0 +/- 9.0 and -74.0 +/- 15.0%, respectively), but not arachidonic acid-induced TXB2 formation by dog platelets, suggesting that CV-1808 inhibited phospholipases. Myocardial infarct size determined 60 min after reperfusion was significantly reduced by CV-1808. Thus, CV-1808 appeared to be effective for salvaging ischemic myocardium. The effect might be related to improvement of coronary circulation and inhibition of release of vasoactive substances, including TXA2, from the ischemic myocardium.
Adenosine↗
Protective effect of a novel thromboxane synthetase inhibitor, CV-4151, on myocardial damage due to coronary occlusion and reperfusion in the hearts of anesthetized dogs.
The protective effect of a novel thromboxane (TX) synthetase inhibitor, (E)-7-phenyl-7-(3-pyridyl)-6-heptenoic acid (CV-4151), on myocardial damage due to an ischemic episode and reperfusion was investigated in anesthetized, open-chested dogs. The left anterior descending coronary artery (LAD) was occluded for 60 min and subsequently reperfused for 60 min. CV-4151 was infused i.v. at a dose of 1 mg/kg over a 10-min period starting 20 min before the LAD occlusion. The agent had no acute hemodynamic effects. Within 30 min after LAD occlusion, 15.6-33.3% of dogs experienced ventricular fibrillation (VF); CV-4151 had no significant effect on the incidence of VF. After reperfusion, the frequency of ventricular extrasystoles (PVCs) was markedly increased, and 33.3% (9 of 27 dogs) died of VF in the control group. CV-4151 suppressed the exaggerated PVCs, and the incidence of VF in the group was 0% (0/18, p less than 0.05). Myocardial infarct size determined 60 min after reperfusion by a p-nitroblue tetrazolium (p-NBT) staining technique was significantly reduced by CV-4151. Increase in TXB2 release into the great coronary vein during reperfusion was completely inhibited by CV-4151, whereas release of 6-keto-PGF1 alpha tended to increase during occlusion and reperfusion. Thus, the ratio of 6-keto-PGF1 alpha to TXB2 levels was significantly increased throughout occlusion and reperfusion periods. These results suggest that inhibition of TXA2 synthesis is beneficial for protection of the myocardium during reperfusion from ischemic damage.
6-Ketoprostaglandin F1 alpha↗
Elevation of serum hyaluronan level in Werner's syndrome.
BACKGROUND: There is a well-established association between Werner's syndrome (WS) and hyperhyaluronic aciduria; however, to date hyaluronan (HA) in the serum has not been statistically linked with WS. Recently, the gene that causes WS has been defined as a DNA helicase on chromosome 8, and 19 different mutations in WS patients have been identified. It is not known whether the mutation type of the Werner helicase gene affects the levels of serum and urine HA in WS patients. OBJECTIVE: To evaluate the association of serum HA with WS, and the relationship of the serum and urine HA levels to the mutation type. METHODS: HA both in the serum and the urine was measured in 40 patients with WS and 114 normal controls. The serum and urine HA were quantified by sandwich binding protein assay and competitive ELISA-like method, respectively. The muation on WS helicase gene was analyzed by mutant-allele-specific amplification and oligomer ligation assay. RESULTS: WS patients showed significantly higher levels of HA in the serum (mean +/- SD: 115.7 +/- 119.8 ng/ml, p < 0.001) and urine (1,040.8 +/- 777.3 ng/mg creatinine, Cre, p < 0.001) than age-matched controls (serum HA: 15.8 +/- 14.2 ng/ml, urine HA: 379.7 +/- 124.2 ng/mg Cre). The serum and urine HA levels of WS patients are almost equal to those of normal controls over 80 years (serum HA: 118.5 +/- 108.4 ng/ml, urine HA: 914.5 +/- 712.1 ng/mg Cre). There was a significant correlation between serum and urine HA levels in WS patients (r = 0.42, p = 0.007). Analysis of the mutation on the helicase gene in 22 WS patients showed that among 44 chromosomes, 3 (6.8%) chromosomes had type 1 mutation, 22 (50.0%) had type 4 mutation, 14 (31.8%) had type 6 mutation, and the rest had other mutations. The serum and urine levels of HA did not show any significant association with the mutation type. CONCLUSION: The hyperhyaluronic aciduria in WS reflects the high level of serum HA. The serum and urine HA levels are useful biochemical markers for WS irrespective of the muation type of the Werner helicase gene.
Adult↗
Mastoid condition and clinical course of cholesteatoma.
This study was carried out to establish which type of cholesteatoma is controllable by conservative treatment from the viewpoint of mastoid ventilation. We examined the area of the air cell system and airspace (aeration) in the mastoid cavity by computed tomography and eustachian tube (ET) function by inflation-deflation test in 20 ears (20 patients) with severe attic retraction for over 12 months (retraction pocket group), 16 ears (16 patients) with cholesteatoma which could be controlled only by conservative treatment for over 12 months (nonsurgical group) and 43 ears (43 patients) which required surgery within a year in spite of similar conservative treatment (surgical group). The size of the mastoid air cell system in the retraction pocket group, nonsurgical group and surgical group was 2.9 +/- 1.3, 1.9 +/- 0.7 and 1.5 +/- 0.9 cm(2) on average, respectively, with no significant difference between both cholesteatoma groups (nonsurgical and surgical group). While aeration was observed in the mastoid in 17 of 20 ears (85.%) in the retraction pocket group and in 12 of 16 ears (75.0%) in the nonsurgical group, aeration was present only in 9 of 43 ears (26.5%) in the surgical group, being significantly less in the surgical group than in the nonsurgical group and the retraction pocket group. In all ears in the retraction pocket and nonsurgical groups, and 19 of 30 ears in the surgical group, ET function was poor, there being no significant difference among the three groups. The present clinical observations suggest that progressiveness of cholesteatoma could be related to the ventilatory conditions in the mastoid rather than ET function, and that conservative treatment may be effective when ears with cholesteatoma have aeration in the mastoid.
Adolescent↗
Laryngeal phonatory reflex. The effect of anesthetization of the internal branch of the superior laryngeal nerve: Acoustic aspects.
Summary--The laryngeal phonatory reflex through the internal branch of the superior laryngeal nerve (SLN) was investigated by means of anesthetization of the nerve, after which acoustic signals were subjected to computer analysis to determine how anesthesia affected basic vocal parameters. Results showed that the anesthetization did not affect the abrupt cycle-to-cycle frequency changes and also did not influence the gross control of the fundamental frequency. But slower fluctuation of the fundamental frequency increased following anesthesia. From these results, it is suggested that the anesthetization of the internal branch of the SLN may derange the fine control mechanism of the larynx without affecting overall or gross performance of the phonatory apparatus.
Humans↗
Clinical significance of asymmetrical vocal cord tension.
The effects of asymmetrical tension on the vibratory pattern of the vocal cords were studied in two kinds of experiments: 1) high speed motion picture photography of artificial voice production in excised canine and human larynges, and 2) computer synthesis of voice and vocal cord vibration via a theoretical model incorporating the physiological parameters required for phonation. In both approaches the asymmetrically tensed vocal cords consistently vibrated in three distinct modes which depend partly on the rest positions of the vocal cords; Type I. For rest positions at or near closure, the two cords vibrate at the same frequency with glottal closure every period, and with tense cord preceding the lax one in phase and with the line of contact moving toward the tenser cord during the closed phase. The voice produced is not hoarse; Type II. For wider rest positions glottal closure occurs irregularly, the vibrations become complex and less periodic, and the voice becomes hoarse; Type III. The glottis never closes and the vibrations become more periodic with reduced amplitude. Supplementary stroboscopic observations suggest a precedure for diagnosing tension asymmetry and the implications for surgical treatment for disorders of vocal pitch are discussed.
Animals↗
Cricothyroid distance and vocal pitch. Experimental surgical study to elevate the vocal pitch.
To establish an experimental basis for surgical approximation of the anterior cricothyroid distance which aims at raising the vocal pitch, the relationship between vocal pitch and the cricothyroid distance was analyzed in voices produced with excised human larynges (four male and two female larynges). Within the framework of the experimental conditions, the following conclusions were drawn: 1) The vocal pitch expressed in semitones was almost linearly related to the cricothyroid distance, with an increase of 0.15 to 0.90 semitones per milimeter of cricothyroid approximation. 2) The rise in vocal pitch reached a plateau when the force applied to shorten the cricothyroid distance reached 30 to 50 gm.
Cricoid Cartilage↗
Parasitological and serological studies on amoebiasis and other intestinal parasitic infections in Recife and its suburban area, northeast Brazil.
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Adolescent↗
Serological studies on schistosomiasis mansoni in the northeast Brazil (I).
Sera from the patients (N = 10) with schistosomiasis mansoni of the hospital of Federal University of Pernambuco, the Schistosoma mansoni egg-positive (N = 51) and -negative (N = 452) inhabitants in Cabo City area, out-patients (N = 37) of the IMIP hospital and Japanese immigrants (N = 127) in Petrolina City area of northeast Brazil as well as Japanese healthy subjects (N = 30) were examined by serological tests including an enzyme-linked immunosorbent assay with antigens prepared from eggs (ELISA-egg) and adult worms (ELISA-adult). The ELISA with egg or adult antigen correctly identified 100% of the uninfected individuals lived in non-endemic area of schistosomiasis. Moreover, when examined cross-reactivity of our ELISA with sera isolated from 78 subjects infected with various intestinal parasitic infections, only one of these sera reacted with the egg and adult antigens. On the examination of 51 sera from the egg-positive subjects, the ELISA-egg revealed the highest sensitivity (98.0%), whereas a large number of false negative reactions of ELISA-adult, Ouchterlony method using adult antigen, circumoval precipitation and immediate intradermal skin test were observed. A low sensitivity of these serologic tests except for ELISA-egg appears to be primarily due to their inability to detect antibody in the sera from egg-positive infantiles. There was no positive correlation between the absorbance values of these two types of ELISA among the sera isolated from ELISA-positive subjects. Rather, by the reactivity of these sera to egg or adult antigen, they could be divided into two subgroups; one reacted more positively with egg antigen and the other with adult antigen. Moreover, it was confirmed that the sera from young subjects (under 20 years old) appear to be highly reactive to the egg antigen than did aged ones. These data suggest that the ELISA with egg antigen, but not with the adult antigen, appears to be useful for the serological survey of schistosomiasis mansoni in the endemic area of northeast Brazil.
Adolescent↗
Parasitological and serological studies on amoebiasis and other intestinal parasitic infections in the rural sector around Recife, northeast Brazil.
Parasitological examinations were carried out during July to December, 1989, on 485 inhabitants of four villages in São Lourenço da Mata, 25 km northwest of Recife, Pernambuco, Brazil. Approximately 99.6% of the inhabitants were infected with at least one species of intestinal parasites. A high prevalence of Schistosoma mansoni (82.1%), hookworm (80.2%) Trichuris trichiura (69.9%), Ascaris lumbricoides (61.9%) and Entamoeba coli (36.7%) infections were demonstrated. Test tube cultivation revealed that the most common species of hookworm in this region was Necator americanus (88.4%), and also that the prevalence of Strongyloides stercoralis was 5.8%. Three hundred and thirty-four sera were serologically examined for amoebiasis by the gel diffusion precipitation test (GDP) and enzyme-linked immunosorbent assay (ELISA). No positive reaction was observed in all sera as examined by GDP, while 24 sera were positive by ELISA.
Adolescent↗