676
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Ishikawa S, Kario K, Nago N, Kayaba K, Hiraoka J, Matsuo H, Goto T, Miyamoto T, Tsutsumi A, Nakamura Y, Shimada K, Inoue K, Igarashi M. Factor VII and fibrinogen levels examined by age, sex, and other atherosclerotic risk factors in a Japanese population. The Jichi Medical School Cohort Study. Thromb Haemost 1997; 77:890-3. [PMID: 9184398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Factor VII coagulant activity (FVIIc) and fibrinogen (Fbg) levels have been investigated as cardiovascular risk factors. We studied these two factors with stratification for age, sex and blood pressure, and the relation with other atherosclerotic risk factors in a Japanese general population. The subjects were 3,139 Japanese (1,315 males and 1,824 females) aged 30 to 89 in 1992 and 1993. A linear increase with age was observed in the levels of Fbg in both men and women, but no differences were observed between men and women in each age group. A linear increase with age was also seen in the levels of FVIIc in women, but the levels of FVIIc in men were significantly higher for the age group 40-49 years than for any other age group. The levels of FVIIc in women were significantly higher than in men at age > or = 60 years. As concerning the effect of alcohol intake status, Fbg had a tendency to decrease with alcohol intake. Fbg and FVIIc levels were associated with an increase in smoking status in men, but no association was seen in women in either Fbg or FVIIc. FVIIc was positively correlated with age, body mass index, total cholesterol, triglycerides and fasting insulin level. Fbg was positively correlated with age, systolic blood pressure, diastolic blood pressure, total cholesterol, LDL-cholesterol and triglycerides in women, but Fbg had few positive correlations with risk factors in men. A comparison with previous Western studies showed that the Fbg levels of our Japanese population were lower than those of the Caucasians studied, but the present FVIIc levels were nearly the same level or slightly higher than theirs. The association of Fbg and FVIIc and with other cardiovascular risk factors in Japanese was similar to those observed in Caucasians.
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677
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Nordström T, Shrode LD, Rotstein OD, Romanek R, Goto T, Heersche JN, Manolson MF, Brisseau GF, Grinstein S. Chronic extracellular acidosis induces plasmalemmal vacuolar type H+ ATPase activity in osteoclasts. J Biol Chem 1997; 272:6354-60. [PMID: 9045656 DOI: 10.1074/jbc.272.10.6354] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Proton extrusion into an extracellular resorption compartment is an essential component of bone degradation by osteoclasts. Chronic metabolic acidosis is known to induce negative calcium balance and bone loss by stimulating osteoclastic bone resorption, but the underlying mechanism is not known. The present studies were undertaken to evaluate whether chronic acidosis affects proton extrusion mechanisms in osteoclasts cultured on glass coverslips. Acidosis, mimicked experimentally by maintaining the cells at extracellular pH 6.5, rapidly lowered intracellular pH to 6.8. However, after 2 hours, a proportion of cells demonstrated the capacity to restore intracellular pH to near normal levels. To define the mechanism responsible for this recovery, the activity of individual H+ transport pathways was analyzed. We found that chronic acid treatment for up to 6 h did not significantly affect the cellular buffering power or Na+/H+ antiport activity. In contrast, chronic acidosis activated vacuolar H+ pumps in the osteoclasts. Although only approximately 5% of the control cells displayed proton pump activity, about 40% of cells kept at extracellular pH 6. 5 for 4-6 h were able to recover from the acute acid load by means of bafilomycin A1-sensitive proton extrusion. Conversely, the H+-selective conductance recently described in the plasma membrane of osteoclasts was clearly inhibited in the cells exposed to chronic acidosis. Following acid treatment, the activation threshold of the H+ conductance was shifted to more positive potentials, and the current density was significantly reduced. Considered together, these results suggest that induction of plasmalemmal vacuolar type ATPase activity by chronic acidosis, generated either systemically due to metabolic disease or locally at sites of inflammation, is likely to stimulate osteoclastic bone resorption and thus to promote bone loss.
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678
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Igarashi Y, Goto T. Ten-year follow-up study of conical crown-retained dentures. INT J PROSTHODONT 1997; 10:149-55. [PMID: 9206455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
This study reports the results of a long-term evaluation of conical crown-retained dentures. One hundred fifty-two restorations that had been in place for over 10 years were analyzed. Restorations were divided according to the Kennedy classification. Abutment and periodontal health, occlusion, retention, and frequency of relining and repair were among the factors evaluated. Good prognoses of removable partial dentures were shown in Kennedy Classes I, II, and III arches. However, some of the restorations placed on only a few remaining abutments showed rather unfavorable situations with almost all of the factors evaluated.
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679
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Aeba R, Katogi T, Nakamichi T, Yasudo M, Goto T, Ito T, Moro K, Omoto T, Fujii H, Kawada S. [Hazard developing during the follow-up after reparative surgery for complete transposition of great arteries]. [ZASSHI] [JOURNAL]. NIHON KYOBU GEKA GAKKAI 1997; 45:329-31. [PMID: 9235322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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680
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Goto T, Sakashita H, Murakami K, Sugiura M, Kondo T, Fukaya C. Novel histamine H3 receptor antagonists: synthesis and evaluation of formamidine and S-methylisothiourea derivatives. Chem Pharm Bull (Tokyo) 1997; 45:305-11. [PMID: 9118445 DOI: 10.1248/cpb.45.305] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In order to obtain a new, potent and selective histamine H3 receptor antagonists, chemical modifications of thioperamide, a well-known H3 receptor antagonist, were conducted. A new series of compounds has been synthesized by modifying the thiourea and cyclohexyl groups of thioperamide, and tested for H3 affinity by receptor binding assay using plasma membrane from rat cerebral cortex. The thiourea group of thioperamide was found to be replaceable with a basic moiety such as formamidine or S-methylisothiourea. Replacement of the cyclohexyl group in thioperamide by a 1-adamantyl or an exo-2-norbornyl group increased the affinity for H3 receptor. Among the compounds synthesized, N-(1-adamantyl)-N',N'-[3-(4(5)-1H-imidazolyl)pentamethylene] formamidine 3f (AQ0145) showed the highest H3 receptor affinity, having a potent antagonistic activity. This compound was at least 1,000-fold more active towards H3 than towards H1 and H2 receptors.
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681
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Yagi S, Goto T, Ohi Y. [Perirenal hematoma]. RYOIKIBETSU SHOKOGUN SHIRIZU 1997:646-50. [PMID: 9278015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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682
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Tachibana T, Honbo Y, Masuyama H, Takase A, Sakurayama T, Goto T, Minowa M. [A tuberculosis outbreak in a high school in Tokyo]. [NIHON KOSHU EISEI ZASSHI] JAPANESE JOURNAL OF PUBLIC HEALTH 1997; 44:61-71. [PMID: 9094855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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683
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Abstract
Xenon is an inert gas with a practical anesthetic potency (1 MAC = 71%). Because it is very expensive, the use of closed circuit anesthesia technique is ideal for the conduction of xenon anesthesia. Here we describe our methods of starting closed circuit anesthesia without excessive waste of xenon gas. We induce anesthesia with intravenous agents, and after endotracheal intubation, denitrogenate the patient for approximately 30 min with a high flow of oxygen. This is done to minimize accumulation of nitrogen in the anesthesia circuit during the subsequent closed-circuit anesthesia with xenon. Anesthesia is maintained with an inhalational anesthetic during this period. Then, we discontinue the inhalation agent and start xenon. For this transition, we feel it is unacceptable to simply administer xenon at a high flow until the desired end-tidal concentration is reached because it is too costly. Instead we set up another machine with its circuit filled in advance (i.e., primed) with at least 60% xenon in oxygen and switch the patient to this machine. To prime the circuit, we push xenon using a large syringe into a circuit, which was prefilled with oxygen. Oxygen inside the circuit is pushed out before it is mixed with xenon, and xenon waste will thus be minimized. In this way, we can achieve close to 1 MAC from the beginning of xenon anesthesia, and thereby minimize the risk of light anesthesia and awareness during transition from denitrogenation to closed-circuit xenon anesthesia.
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684
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Goto T, Yoshitake A, Baba T, Shibata Y, Sakata R, Uozumi H. Cerebral ischemic disorders and cerebral oxygen balance during cardiopulmonary bypass surgery: preoperative evaluation using magnetic resonance imaging and angiography. Anesth Analg 1997; 84:5-11. [PMID: 8988991 DOI: 10.1097/00000539-199701000-00002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We compared the preoperative prevalence of small cerebral infarctions and carotid stenosis to jugular venous oxygen saturation (Sjvo2) during coronary artery bypass grafting (CABG). Sjvo2 served as an indicator of whether cerebral oxygen supply meets demand in patients on cardiopulmonary bypass (CPB). The study population consisted of 121 patients who were either older than 65 yr or had a history of cerebrovascular disease. The patients underwent preoperative cerebral magnetic resonance imaging (MRI) and cervical magnetic resonance angiography (MRA) to detect small cerebral infarctions and carotid artery stenosis. Patients with atherosclerosis of the ascending aorta were identified by intraoperative epiaortic ultrasonography. Liberation of emboli from the aorta in these patients was prevented by modification of the standard operation. From preoperative MRI and MRA, 65 patients (54%) had small cerebral infarctions in the white matter or basal ganglia and nine patients (7%) demonstrated moderate or severe stenosis in the carotid arteries. Thirteen patients (11%) had moderate or severe atheromatous disease of the ascending aorta. The severity of aortic atherosclerosis was significantly correlated with the grade of carotid stenosis (P < 0.05). In patients with small infarctions, Sjvo2 was significantly lower than in patients without infarctions (controls) at initiation of CPB, 30 min after aortic cross-clamping, and during the rewarming period of CPB (P < 0.05). Thus, small cerebral infarctions were not uncommon in elderly patients undergoing CABG. Patients with small cerebral infarctions may be at risk for an imbalance in cerebral oxygen supply and demand during the rewarming period because they are unable to deliver the necessary compensatory blood flow.
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685
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Kawahara K, Goto T, Ohi Y. [Pyonephrosis--pyohydronephrosis]. RYOIKIBETSU SHOKOGUN SHIRIZU 1997:681-3. [PMID: 9278025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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686
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Sugimura K, Goto T, Kasai S, Tsuchida K, Takemoto Y, Yamagami S, Kishimoto T. The activation of serum hepatocyte growth factor in acute renal failure. Nephron Clin Pract 1997; 76:364-5. [PMID: 9226248 DOI: 10.1159/000190212] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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687
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Narushima T, Goto T, Hirai T, Iguchi Y. High-Temperature Oxidation of Silicon Carbide and Silicon Nitride. ACTA ACUST UNITED AC 1997. [DOI: 10.2320/matertrans1989.38.821] [Citation(s) in RCA: 137] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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688
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Goto T, Wright E, Monk M. Paternal X-chromosome inactivation in human trophoblastic cells. Mol Hum Reprod 1997; 3:77-80. [PMID: 9239711 DOI: 10.1093/molehr/3.1.77] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Dosage compensation for X-chromosome-linked genes between male and female mammals occurs by inactivation of one of the two X chromosomes in the female. In somatic cells, either the paternal or the maternal X chromosome is randomly inactivated in a given cell. In contrast, in the extra-embryonic tissues of mice, the paternally-derived X chromosome is preferentially inactivated. The evidence for paternal X-chromosome inactivation in humans is controversial and remains to be clarified. In this study, we have developed a sensitive polymerase chain reaction (PCR) technique to investigate the methylation pattern of the X-linked androgen receptor (AR) gene. The 5' CpG island of this gene is methylated on the inactive X chromosome and hypomethylated on the active X chromosome in somatic cells. The paternal and the maternal alleles of the AR gene may be distinguished by a polymorphism in the number of CAG triplet repeats within the CpG island. As a source of human extra-embryonic tissue, we used chorionic villus (CV) samples from female conceptuses of 10-12 weeks gestation. From a tiny branch of a CV sample, two distinct cell lineages, the trophoblastic and mesodermal lineages, were dissected apart by trypsin digestion and micromanipulation and DNA was extracted separately from these purified tissues. Digestion of the DNA with the methylation-sensitive restriction enzyme, Hpall, followed by PCR amplification revealed that the paternal allele is preferentially methylated in trophoblastic cells, but not in mesodermal cells. These results strongly suggest that the paternal X chromosome is preferentially inactivated in the human extra-embryonic tissues early in development.
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689
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Yoshino A, Watanabe M, Shimizu K, Goto T, Ichinowatari N, Yoshimasu H, Masaki K, Aoyama T, Hara T. Nonconvulsive status epilepticus during antidepressant treatment. Neuropsychobiology 1997; 35:91-4. [PMID: 9097300 DOI: 10.1159/000119397] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We report 3 patients who experienced nonconvulsive status epilepticus following generalized convulsions during antidepressant treatment. All showed prolonged confusion with some psychiatric symptoms, and their electroencephalograms (EEGs) showed either bilateral synchronous multiple spike wave discharges or continuous diffuse sharp and slow waves. When diazepam was administered intravenously to 1 patient, the clinical symptoms and EEG improved markedly.
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690
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Sugimura K, Lee CC, Kim T, Goto T, Kasai S, Harimoto K, Yamagami S, Kishimoto T. Production of hepatocyte growth factor is increased in chronic renal failure. Nephron Clin Pract 1997; 75:7-12. [PMID: 9031263 DOI: 10.1159/000189492] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Hepatocyte growth factor (HGF) facilitates recovery from tissue injuries. We previously reported that serum HGF levels were elevated in chronic renal failure (CRF) patients. In the present study Western blot analysis of CRF patients' sera showed the majority of their serum HGF was a single-chain precursor molecule. In CRF rats developed by 5/6 nephrectomy or high adenine diet, both HGF mRNA expression levels and tissue HGF concentrations were increased in liver and spleen. The results suggest that HGF production increases in CRF, which may be a response to chronic progressive renal injuries in an endocrine manner.
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691
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Kawahara K, Goto T, Ohi Y. [Renal abscess]. RYOIKIBETSU SHOKOGUN SHIRIZU 1997:666-7. [PMID: 9278020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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692
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Goto T, Kohno T, Hong W, Hironaka T, Hirai K, Nakai M. Detection of Epstein-Barr virus DNA in virus-infected cells by electron microscopic in situ hybridization. JOURNAL OF ELECTRON MICROSCOPY 1997; 46:431-437. [PMID: 9394456 DOI: 10.1093/oxfordjournals.jmicro.a023539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We describe a procedure for in situ hybridization using a biotinylated Epstein-Barr virus (EBV) sequence with detection at the light and electron microscopic levels. In situ hybridization using an immunogold-silver staining detection system was used to identify biotinylated DNA probes in cell smears and in Lowicryl K4M-embedded EBV-infected and -noninfected cell lines. At the light microscopic level, the reaction product of hybridized EBV DNA sequence seemed to be located mainly in the nuclei. The labelling was dependent on the cell strains. However, at the electron microscopic level, the reaction product was evident as spots or clusters distributed not only in the nuclei of EBV-infected cells but also in the cytoplasm and extracellular particles. These findings suggest that immature particles in the cytoplasm contain EBV DNA. This procedure can be applied to the observation and identification of virus infection.
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693
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694
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Kawahara M, Goto T, Ohi Y. [Perinephritis--perinephric abscess, perirenal abscess]. RYOIKIBETSU SHOKOGUN SHIRIZU 1997:643-5. [PMID: 9278014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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695
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Ito K, Kodama R, Goto T, Maeda M, Tsuji A, Arimura A. Highly sensitive nonisotopic immunoassay for PACAP-27 using various detection methods. Ann N Y Acad Sci 1996; 805:743-8. [PMID: 8993471 DOI: 10.1111/j.1749-6632.1996.tb17551.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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696
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Endo T, Goto T, Kitajima Y, Kiya T, Yamamoto H, Kudo R. [Effects of hydrogen peroxide on cellular level of ATP, and relationship between ATP depletion and luteolytic effects in human granulosa luteal cells]. NIHON SANKA FUJINKA GAKKAI ZASSHI 1996; 48:1157-1158. [PMID: 8960689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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697
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Sawae Y, Niho Y, Okamura T, Gondo H, Kozuru M, Uike N, Muta K, Goto T, Suehiro Y, Kumakawa M, Nishimura J, Yufu Y, Ishikura H, Yamashita S, Hisano S, Morioka E, Nakajima H, Shibuya T, Yamasaki K, Harada N, Asayama R, Hayashi S, Akashi K, Suematsu E, Kawasaki C. [Comparison between monotherapy with imipenem/cilastatin sodium (IPM/CS) and combinations of IPM/CS and other drugs for treating bacterial infections in patients with hematopoietic disorders]. THE JAPANESE JOURNAL OF ANTIBIOTICS 1996; 49:1049-61. [PMID: 9032592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
One hundred and nine patients with infections concurrent with hematopoietic disorders were treated with imipenem/cilastatin sodium (IPM/CS) either alone (IPM/CS monotherapy) or in combination with other antimicrobial drugs (IPM/CS combination therapy). The following results were obtained. 1. One hundred and nine patients were allocated at random to two groups: 53 patients to IPM/CS monotherapy and 56 patients to IPM/CS combination therapy. Fourteen patients (6 and 8 in the 2 groups, respectively) were excluded from the clinical evaluation. There were not significant differences between the two groups with respect to the background. 2. The efficacy rates of the 2 treatments against bacterial infections were as follows: in the IPM/CS monotherapy group, 62.5% in 8 patients with sepsis, 75.0% in 23 patients with fever of undetermined origin (FUO), 50.0% in 10 patients with pneumonia, and 68.3% in the 47 patients, and in the IPM/CS combination group, 85.7% in 7 patients with sepsis, 63.6% in 24 patients with FUO, 50.5% in 8 patients with pneumonia, and 67.4% in the 48 patients. The differences between the two groups were not significant. 3. Among the drugs used in combination with IPM/CS, antibiotics other than penicillins, cephalosporins, and aminoglycosides were used in 12 patients and a high efficacy rate of 91.7% was obtained. 4. Bacteriologically, 19 and 17 strains were isolated from the IPM/CS monotherapy and combination therapy groups respectively, and the eradication rates were 100% and 88.9% respectively. 5. Side effects were noted in 2 patients in the IPM/CS monotherapy group and 7 in the combination therapy group, but all of these resolved after discontinuation or completion of the treatment. The efficacies against severe bacterial infections in the presence of hematopoietic disorders were not different between IPM/CS alone and IPM/CS in combination with other antibiotics. Adverse reactions were uncommon with the monotherapy.
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698
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Fujii M, Mori S, Goto T, Kiya T, Yamamoto H, Ito E, Kudo R. Simultaneous intra- and extra-uterine pregnancy with ovarian hyperstimulation syndrome after induction of ovulation: a case report. J Obstet Gynaecol Res 1996; 22:589-94. [PMID: 9037949 DOI: 10.1111/j.1447-0756.1996.tb01075.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We present a case of polycystic ovary syndrome (PCOS) that developed simultaneous intra- and extra-uterine pregnancy with ovarian hyperstimulation syndrome (OHSS) after induction of ovulation with pure FSH-HCG. At 9 weeks of pregnancy, the bilateral tubal pregnancy caused an imminent spontaneous abortion, and both Fallopian tubes were resected. After the laparotomy, the pregnancy progressed without problems until 31 weeks and 5 days of pregnancy, when signs of spontaneous abortion appeared, and healthy twin female babies were delivered by cesarean section. The incidence of heterotopic pregnancy is increasing in cases in which inducers of ovulation or ART, such as IVF-ET and GIFT, have been employed. One must be well aware that the danger of heterotopic pregnancy following induction of ovulation is imminent, particularly in cases with risk factors of multiple and/or extra-uterine pregnancy, such as PCOS, a history of tubal restoration, and sexually transmitted disease(s).
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699
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Goto T, Murakami O, Sato F, Haraguchi M, Yokoyama K, Sasano H. Oestrogen producing adrenocortical adenoma: clinical, biochemical and immunohistochemical studies. Clin Endocrinol (Oxf) 1996; 45:643-8. [PMID: 8977764 DOI: 10.1046/j.1365-2265.1996.00833.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Oestrogen producing adrenocortical tumours are extremely rare. We report a 65-year-old woman who presented with abnormal vaginal bleeding, with no significant abnormalities in her uterus or ovaries, who was found to have a right adrenal mass by radiological examination. Excessive secretion of oestrogens from the tumour was demonstrated by adrenal venous sampling. Basal levels of corticosteroids were within normal limits. Adrenalectomy was performed and pathological examination revealed an adrenocortical adenoma measuring 5.5 cm in its greatest dimension, in which both clear and compact tumour cells were observed. Oestrogen levels normalized following the removal of the adrenal mass. Tissue concentrations of oestrone and oestradiol in the tumour were 6.9 (69.5 pmol/g wet tissue weight) and 34.6 (93.6 pmol/g wet tissue weight)-fold greater respectively than those of adjacent non-neoplastic adrenal cortex. Aromatase activity in the tumour tissue determined by the 3H-water method was 118.6 pmol/h/mg protein, equivalent to that of a full-term human placenta. Immunohistochemical analysis of aromatase demonstrated immunoreactivity in the tumour cells, especially in compact cells, but not in adjacent non-neoplastic adrenal cells. This is the first reported case of an oestrogen producing adrenocortical adenoma in which aromatase in the tumour cells was documented.
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700
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Goto T, Wicklow DT, Ito Y. Aflatoxin and cyclopiazonic acid production by a sclerotium-producing Aspergillus tamarii strain. Appl Environ Microbiol 1996; 62:4036-8. [PMID: 8899995 PMCID: PMC168224 DOI: 10.1128/aem.62.11.4036-4038.1996] [Citation(s) in RCA: 115] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The production of aflatoxins B1 and B2 by Aspergillus tamarii (subgenus Circumdati section Flavi) is reported for the first time. The fungus was isolated from soil collected from a tea (Camellia sinensis) field in Miyazaki Prefecture, Japan. Three single-spore cultures, NRRL 25517, NRRL 25518, and NRRL 25519, were derived from subcultures of the original isolate 19 (MZ2). Each of these single-spore cultures of A. tamarii produced aflatoxins B1 and B2 and cyclopiazonic acid, as well as black, pear-shaped sclerotia. The demonstration of aflatoxin production by A. tamarii is examined in connection with A. tamarii phylogenetic relationships, chemical ecology, and potential use in food fermentations.
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