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Higashi N, Taniguchi M, Mita H, Osame M, Akiyama K. A comparative study of eicosanoid concentrations in sputum and urine in patients with aspirin-intolerant asthma. Clin Exp Allergy 2002; 32:1484-90. [PMID: 12372129 DOI: 10.1046/j.1365-2745.2002.01507.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Although many studies have assumed that the overproduction of cysteinyl- leukotrienes (cys-LTs) and an imbalance of arachidonic acid metabolism may be plausible causes for the pathogenesis of aspirin-intolerant asthma (AIA), there has been little experimental evidence to substantiate this notion in lower airways of patients with AIA. OBJECTIVES The purpose of this study was to compare the eicosanoid concentrations in sputum and urine from patients with AIA. METHODS The concentrations of sputum cys-LTs, prostaglandin E2 (PGE2), PGF2alpha, PGD2 and thromboxane B2 were measured to assess local concentrations of eicosanoids in patients with AIA and in those with aspirin-tolerant asthma (ATA). The concentrations of two urinary metabolites, leukotriene E4 (LTE4) and 9alpha11betaPGF2, were also measured to corroborate the relationship between the eicosanoid biosynthesis in the whole body and that in lower airways. RESULTS The concentration of PGD2 in sputum was significantly higher in patients with AIA than in those with ATA (median, 5.3 pg/mL vs. 3.1 pg/mL, P < 0.05), but there was no significant difference in the concentration of the corresponding metabolite, 9alpha11betaPGF2, between the two groups. No differences were noted in the concentrations of other prostanoids in sputum between the two groups. The sputum cys-LT concentrations showed no differences between the two groups, in spite of the observation that the concentration of urinary LTE4 was significantly higher in patients with AIA than in those with ATA (median, 195.2 pg/mg-cre vs. 122.1 pg/mg-cre, P < 0.05). There was a significant correlation among the concentration of cys-LTs, the number of eosinophils and the concentration of eosinophil-derived neurotoxin (EDN) in sputum. CONCLUSION The urinary concentration of LTE4 does not necessary reflect cys-LT biosynthesis in lower airways. A significantly higher concentration of PGD2 in sputum from patients with AIA suggests the possible ongoing mast cell activation in lower airways.
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Akiyama K, Nakata K, Hasegawa M, Koga M, Negishi N. [Primary malignant tumor of the aorta]. Zentralbl Chir 2002; 127:791-3. [PMID: 12221562 DOI: 10.1055/s-2002-33960] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A 63-year old man suffering from bilateral leg pain was admitted to our hospital with an occlusion of the infrarenal abdominal aorta. A bifurcated dacron graft was implanted and a histological examination of the thrombotic material was performed. Atypical cells were detected in the thrombus leading to an investigation of the thoracic aorta showing an unclear mass in the aortic arch. The tumor was resected and the aorta replaced with a dacron graft. Histology revealed a primary sarcoma. The patient is doing well 6 months after operation.
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Fujikawa Y, Akiyama K, Nagao T, Sakurai T, Lagally MG, Hashimoto T, Morikawa Y, Terakura K. Origin of the stability of Ge(105) on si: a new structure model and surface strain relaxation. PHYSICAL REVIEW LETTERS 2002; 88:176101. [PMID: 12005768 DOI: 10.1103/physrevlett.88.176101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2002] [Indexed: 05/23/2023]
Abstract
The structure of Ge(105)-(1 x 2) grown on Si(105) is examined by scanning tunneling microscopy (STM) and first-principles calculations. The morphology evolution with an increasing amount of Ge deposited documents the existence of a tensile surface strain in Si(105) and its relaxation with increasing coverage of Ge. A detailed analysis of high-resolution STM images and first-principles calculations produce a new stable model for the Ge(105)-(1 x 2) structure formed on the Si(105) surface that includes the existence of surface strain. It corrects the model developed from early observations of the facets of "hut" clusters grown on Si(001).
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104
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Takatori K, Saito A, Yasueda H, Akiyama K. The effect of house design and environment on fungal movement in homes of bronchial asthma patients. Mycopathologia 2002; 152:41-9. [PMID: 11694095 DOI: 10.1023/a:1011933627275] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The effect of house building design and environment on the fungal movement in the houses of 41 bronchial asthma (BA) patients has been investigated by examining house dust. The presence and composition of fungi were determined and compared in relation to building structure, house age, size of living room, main flooring material, presence of a living-room rug or air purifier, and frequency of vacuum cleaning. Among these elements, fungal CFU apparently varied only between building structure: wooden-board houses had significantly higher numbers of fungi than reinforced concrete houses (p < 0.01), and wooden mortar or iron-framed prefabricated houses had significantly higher numbers of fungi than reinforced concrete houses (p < 0.05). Classification of the types of fungi present in the house dust of BA patients showed that, regardless of the building designs, there were high levels of osmophilic fungi (group A) and fungi that survive at relatively dry conditions (group B), whereas fungi that survive in very wet conditions (group D) were present at low frequency.
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105
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Yamada T, Murayama T, Mita H, Akiyama K. Bladder hypersensitivity of interstitial cystitis complicated by allergic diseases. Urology 2002; 57:125. [PMID: 11378117 DOI: 10.1016/s0090-4295(01)01091-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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106
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Akiyama K. [Pre-trial treatment of the mentally handicapped: a case of Mr. Iwao Hakamada]. SEISHIN SHINKEIGAKU ZASSHI = PSYCHIATRIA ET NEUROLOGIA JAPONICA 2002; 103:672-5. [PMID: 11797426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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107
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Taniyasu N, Akiyama K, Hirota J, Iba Y. Newly developed left main coronary artery lesion after coronary stenting. THE JOURNAL OF CARDIOVASCULAR SURGERY 2002; 43:55-8. [PMID: 11803329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Percutaneous transluminal coronary stenting is a proven nonoperative method of direct myocardial revascularization. We encountered a case of iatrogenic significant subacute left main coronary artery stenosis in a patient who had undergone prior percutaneous transluminal coronary artery stenting of the left anterior descending (LAD) artery. Coronary artery bypass grafting was performed. To our knowledge, this is the first report of a surgical case of left main coronary artery stenosis worsened by changes secondary to earlier coronary stenting in the mid portion of left descending coronary artery in Japan.
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108
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Saito H, Yamamoto N, Tomita S, Taniguchi M, Hasegawa M, Akiyama K, Kawaguchi H, Takahashi K. Effect of emedastine difumarate on CC chemokine-elicited eosinophil migration. Int Arch Allergy Immunol 2002; 125 Suppl 1:22-8. [PMID: 11408768 DOI: 10.1159/000053848] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Emedastine difumarate (emedastine) is an antiallergic drug found among the derivatives which has a series of benzimidazole frames. It has been reported that emedastine can significantly inhibit the migration of eosinophils elicited by classical chemoattractants, including LTB4 or PAF. However, the effect of emedastine on the selective migration of eosinophils that have been stimulated with CC chemokines has not been examined. Emedastine at concentrations of 10 nM or higher strongly inhibited the eosinophil migration elicited by CC chemokines, including eotaxin, RANTES and MCP-3. Preincubation of the eosinophils with emedastine did not alter the expression of the CCR3 receptor, although a decrease in the concentration of intracellular calcium ions was observed after stimulation with 100 ng/ml of eotaxin. Herbimycin A, genistein, staurosporin and emedastine were all able to inhibit the eotaxin-elicited migration. Tyrosine kinase activity in the cytosol supernatant of eosinophils obtained after stimulation with eotaxin significantly decreased when the eosinophils were preincubated with emedastine. In addition, protein kinase A and protein kinase C activities in eotaxin-stimulated EoL-1 cell supernatants decreased significantly with emedastine pretreatment. These findings suggest that emedastine inhibits CC chemokine-elicited eosinophil migration by decreasing the activities of tyrosine kinase or protein kinases but does not alter CCR3 expression.
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Kaminuma O, Fujimura H, Fushimi K, Nakata A, Kikkawa H, Akiyama K, Mori A. Humoral immunity is dispensable for the local recruitment of antigen-specific Th2 cells. Int Arch Allergy Immunol 2002; 125 Suppl 1:17-8. [PMID: 11408766 DOI: 10.1159/000053846] [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: 11/19/2022] Open
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110
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Mori A, Ikeda Y, Taniguchi M, Aoyama C, Maeda Y, Hasegawa M, Kobayashi N, Akiyama K. IL-5 production by peripheral blood Th cells of adult asthma patients in response to Candida albicans allergen. Int Arch Allergy Immunol 2002; 125 Suppl 1:48-50. [PMID: 11408773 DOI: 10.1159/000053853] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Cytokines produced by T cells are involved in chronic asthma. Relevant antigens for nonatopic asthma are still mostly unknown. Peripheral blood mononuclear cells (PBMCs) were obtained from adult asthmatic donors and incubated with Candida albicans extract. Proliferation response and cytokine production were analyzed. IL-2 and IL-5 were detectable in the cultures incubated with C. albicans extract, whereas IL-4 was undetectable. PBMCs obtained from some nonatopic asthma patients produced IL-5 upon stimulation of C. albicans extract. C. albicans allergen may be involved in the airway eosinophilic inflammation through the induction of IL-5 production by Th cells.
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Nagame Y, Asai M, Haba H, Tsukada K, Goto S, Sakama M, Nishinaka I, Toyoshima A, Akiyama K, Ichikawa S. Status and Prospects of Heavy Element Nuclear Chemistry Research at JAERI. ACTA ACUST UNITED AC 2002. [DOI: 10.14494/jnrs2000.3.129] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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112
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Nagame Y, Asai M, Haba H, Goto S, Tsukada K, Nishinaka I, Nishio K, Ichikawa S, Toyoshima A, Akiyama K, Nakahara H, Sakama M, Sch^|^auml;adl M, Kratz JV, G^|^auml;ggeler HW, T^|^uuml;rler A. Production Cross Sections of 261Rf and 262Db in Bombardments of 248Cm with 18O and 19F Ions. ACTA ACUST UNITED AC 2002. [DOI: 10.14494/jnrs2000.3.85] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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113
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Asai M, Sakama M, Tsukada K, Ichikawa S, Haba H, Nishinaka I, Nagame Y, Goto S, Akiyama K, Toyoshima A, Kojima Y, Oura Y, Nakahara H, Shibata M, Kawade K. Decay Studies of Neutron-deficient Am, Cm, and Bk Nuclei Using an On-line Isotope Separator. ACTA ACUST UNITED AC 2002. [DOI: 10.14494/jnrs2000.3.187] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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114
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Haba H, Tsukada K, Asai M, Goto S, Toyoshima A, Nishinaka I, Akiyama K, Hirata M, Ichikawa S, Nagame Y, Shoji Y, Shigekawa M, Koike T, Iwasaki M, Shinohara A, Kaneko T, Maruyama T, Ono S, Kudo H, Oura Y, Sueki K, Nakahara H, Sakama M, Yokoyama A, Kratz JV, Sch^|^auml;del M, Br^|^uuml;chle W. Anion-exchange Behavior of Rf in HCl and HNO3 Solutions. ACTA ACUST UNITED AC 2002. [DOI: 10.14494/jnrs2000.3.143] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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115
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Ogawa K, Kaminuma O, Kikkawa H, Nakata A, Asahina M, Egan RW, Akiyama K, Mori A. Transient contribution of mast cells to pulmonary eosinophilia but not to hyper-responsiveness. Clin Exp Allergy 2002; 32:140-8. [PMID: 12002731 DOI: 10.1046/j.0022-0477.2001.01248.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND We have recently demonstrated that the transfer of interleukin (IL)-5-producing CD4+ T cell clones into unprimed mice is sufficient for the development ofeosinophilic inflammation in the bronchial mucosa upon antigen inhalation. OBJECTIVE The aim of this study was to elucidate the possible contribution of mast cells in eosinophilic inflammation and bronchial hyper-responsiveness (BHR), and to discriminate between the roles of CD4+ T cells and mast cells. METHODS Mast cell-deficient mice (WBB6F1-W/Wv) and their congenic normal littermates (WBB6F1-+/+) were immunized with ovalbumin and challenged by inhalation with the relevant antigen. RESULTS Airway eosinophilia was induced with equivalent intensity in +/+ and W/Wv mice 6, 24, 96 and 216 h after antigen inhalation. In contrast, 48 h after antigen challenge, eosinophilic infiltration into the bronchial mucosa was significantly less pronounced in W/Wv mice than in +/+ mice. Anti-CD4 monoclonal antibody (mAb), anti-IL-5 mAb, and cyclosporin A were administered next, demonstrating that the airway eosinophilia of W/Wv mice induced 48 h after antigen challenge was almost completely inhibited by each of these three treatments, but that of +/+ mice was significantly less susceptible. Bronchial responsiveness to acetylcholine was increased 48 h after antigen challenge and was not significantly different between +/+ and W/Wv mice. Administration of anti-IL-5 mAb completely inhibited the development of BHR in both +/+ and W/Wv mice. CONCLUSION These results indicate that, in mice, mast cells do have a supplemental role in the development of pulmonary eosinophilia but not BHR. CD4+ T cells totally regulate these responses by producing IL-5.
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Akiyama K, Tanaka R, Sato M, Takeda N. Cognitive dysfunction and histological findings in adult rats one year after whole brain irradiation. Neurol Med Chir (Tokyo) 2001; 41:590-8. [PMID: 11803584 DOI: 10.2176/nmc.41.590] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cognitive dysfunction and histological changes in the brain were investigated following irradiation in 20 Fischer 344 rats aged 6 months treated with whole brain irradiation (WBR) (25 Gy/single dose), and compared with the same number of sham-irradiated rats as controls. Performance of the Morris water maze task and the passive avoidance task were examined one year after WBR. Finally, histological and immunohistochemical examinations using antibodies to myelin basic protein (MBP), glial fibrillary acidic protein (GFAP), and neurofilament (NF) were performed of the rat brains. The irradiated rats continued to gain weight 7 months after WBR whereas the control rats stopped gaining weight. Cognitive functions in both the water maze task and the passive avoidance task were lower in the irradiated rats than in the control rats. Brain damage consisting of demyelination only or with necrosis was found mainly in the body of the corpus callosum and the parietal white matter near the corpus callosum in the irradiated rats. Immunohistochemical examination of the brains without necrosis found MBP-positive fibers were markedly decreased in the affected areas by irradiation; NF-positive fibers were moderately decreased and irregularly dispersed in various shapes in the affected areas; and GFAP-positive fibers were increased, with gliosis in those areas. These findings are similar to those in clinically accelerated brain aging in conditions such as Alzheimer's disease, Binswanger's disease, and multiple sclerosis.
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117
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Akiyama K. [Fungal allergy -clinical aspect-]. NIHON ISHINKIN GAKKAI ZASSHI = JAPANESE JOURNAL OF MEDICAL MYCOLOGY 2001; 42:109-11. [PMID: 11479529 DOI: 10.3314/jjmm.42.109] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Fungus is known to be one of the important causative allergens of allergic diseases such as bronchial asthma, allergic rhinitis and atopic dermatitis. Not only outdoor airborne fungi but also indoor fungi such as Aspergillus restrictus and Eurotium have recently received attention as causative fungal allergens of allergic diseases. In addition to careful history taking, in vivo testing methods such as skin test and conjunctival or bronchial provocation tests are sometimes necessary to diagnose the causative allergen. Problems requiring resolution are: 1. fungal allergens composed of multiple allergenic components, 2. difficulty of environmental monitoring of fungal allergens, 3. special characteristics as microorganisms, and 4. characteristics of normal flora allergy, etc.
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Mita H, Endoh S, Kudoh M, Kawagishi Y, Kobayashi M, Taniguchi M, Akiyama K. Possible involvement of mast-cell activation in aspirin provocation of aspirin-induced asthma. Allergy 2001; 56:1061-7. [PMID: 11703219 DOI: 10.1111/j.1398-9995.2001.00913.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Although there is increasing evidence of the importance of cysteinyl leukotrienes (LT) as mediators of aspirin-induced bronchoconstriction in aspirin-sensitive asthma, the cellular origin of the LT is not yet clear. METHODS Urinary concentrations of leukotriene E4 (LTE4), 11-dehydrothromboxane B2, 9alpha,11beta-prostaglandin F2, and Ntau-methylhistamine were measured during the 24 h following cumulative intravenous administration of increasing doses of lysine aspirin to asthmatic patients. In addition, the urinary concentrations of these metabolites were measured on 5 consecutive days in a patient who suffered an asthma attack after percutaneous administration of nonsteroidal anti-inflammatory drugs. RESULTS In aspirin-induced asthma patients (AIA, n=10), the basal concentration of urinary LTE4, but not the other metabolites, was significantly higher than that in aspirin-tolerant asthma patients (ATA, n=10). After intravenous aspirin provocation, the AIA group showed a 13.1-fold (geometric mean) increase in excretion of LTE4 during the first 3 h, and 9alpha,11beta-prostaglandin F2 also increased in the AIA group during the first 0-3 h and the 3-6 h collection period. Ntau-methylhistamine excretion was also increased, but to a lesser degree. Administration of aspirin caused significant suppression of 11-dehydrothromboxane B2 excretion in both the AIA and ATA groups. When the percentage of maximum increase of each metabolite from the baseline concentrations was compared between the AIA group and the ATA group, a significantly higher increase in excretion of LTE4, 9alpha,11beta-prostaglandin F2, and Ntau-methylhistamine was observed in the AIA group than the ATA group. An increased excretion of LTE4 and 9alpha,11beta-prostaglandin F2 has been detected in a patient who suffered an asthma attack after percutaneous administration of nonsteroidal anti-inflammatory drugs. CONCLUSIONS Considering that human lung mast cells are capable of producing LTC4, prostaglandin D2, and histamine, our present results support the concept that mast cells, at least, may participate in the development of aspirin-induced asthma.
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Wada K, Yamada N, Sato T, Suzuki H, Miki M, Lee Y, Akiyama K, Kuroda S. Corticosteroid-induced psychotic and mood disorders: diagnosis defined by DSM-IV and clinical pictures. PSYCHOSOMATICS 2001; 42:461-6. [PMID: 11815680 DOI: 10.1176/appi.psy.42.6.461] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The authors investigated long-term outcome and treatment strategy of corticosteroid-induced psychotic and mood disorders as defined by DSM-IV. Review of medical records of 2,069 referral patients revealed 18 applicable patients. Their clinical characteristics, longitudinal courses, and treatments were studied. The authors identified 15 patients with mood disorder and 3 patients with psychotic disorder. Increasing doses or resumption of corticosteroids had the strongest influence on the psychiatric course. These two corticosteroid-induced psychiatric disorders may have different pathophysiological substrates closely related to patient vulnerability. Effective psychopharmacological treatment options were indicated with consideration being given to the underlying diseases.
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Mita H, Hasegawa M, Saito H, Akiyama K. Levels of cysteinyl leukotriene receptor mRNA in human peripheral leucocytes: significantly higher expression of cysteinyl leukotriene receptor 2 mRNA in eosinophils. Clin Exp Allergy 2001; 31:1714-23. [PMID: 11696047 DOI: 10.1046/j.1365-2222.2001.01184.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Cysteinyl leukotrienes (CysLTs) have been implicated as important contributors in the pathophysiology of asthma and their biological effects are mediated by at least two distinct G-protein-coupled receptors. cDNA sequences of cysteinyl leukotriene receptor 1 (CysLTR1) and cysteinyl leukotriene receptor 2 (CysLTR2) have recently been elucidated. OBJECTIVES Our aim is to explore gene expression and the comparative expression of CysLTR1 mRNA and CysLTR2 mRNA in human peripheral blood leucocytes. METHODS Gene expression of CysLTR1 and CysLTR2 mRNAs in human peripheral blood eosinophils, neutrophils, monocytes and T lymphocytes has been measured by competitive reverse transcription-polymerase chain reactions using RNA or DNA competitors. RESULTS (a) When cellular levels of CysLTR1 mRNA were normalized to those of G3PDH mRNA, the relative concentration of CysLTR1 mRNA in eosinophils (43.8 +/- 37.2, n = 29) was significantly higher than that in neutrophils (18.7 +/- 23.3, n = 11), monocytes (0.93 +/- 1.1, n = 10) and T lymphocytes (3.4 +/- 2.4, n = 11). (b) When measured using each DNA competitor, mRNAs for both types of CysLTR coexisted in each type of leucocyte. The ratio of CysLTR1 mRNA to CysLTR2 mRNA was significantly lower in eosinophils (0.65 +/- 0.42, n = 12) than in neutrophils (6.9 +/- 4.9, n = 12), monocytes (1.8 +/- 0.9, n = 10) and T lymphocytes (4.5 +/- 5.7, n = 10). (c) Human umbilical vein endothelial cells expressed CysLTR2 mRNA, but not CysLTR1 mRNA. CONCLUSION These studies reveal that CysLTR1 mRNA and, in particular, CysLTR2 mRNA are abundantly expressed at high levels in eosinophils, raising the possibility that CysLTR2 may have an important physiological role in eosinophils and a CysLTR2 antagonist may be a good target for preventing signal transduction by CysLTs in eosinophils.
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Abe T, Tamiya T, Ono Y, Salker AH, Akiyama K, Ohmoto T. Accumulation of cell cycle regulatory proteins, p21 and p27, induced after hyperthermia in human glioma cells. Int J Hyperthermia 2001; 17:499-507. [PMID: 11719966 DOI: 10.1080/02656730110070219] [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: 10/16/2022] Open
Abstract
It was investigated whether there was a relationship between p53 p21 and p27 induction pathways in the cellular response of glioma cells to hyperthermia. Two glioma cell lines were employed. A-172 cells had the wild-type of p53, and U251 cells had the mutant-type of p53. An adenovirus harbouring wild-type p53 was also used for the overexpression. The protein induction by hyperthermia was monitored by Western blot analysis. In U251 cells, the expression of wild-type p53 and hyperthermia had an additional cytotoxic effect, but did not affect A-172 cells. Significant p21 accumulation by hyperthermia was recognized in A-172 cells, and was also recognized in p53-transduced U251 cells. On the other hand, the accumulation of p27 by hyperthermia was not seen in A-172 or U251 cells, and the exogenous expression of p53 did not affect the accumulation of p27 by hyperthermia in U251 cells. These findings suggest that the p53-p21 pathway is involved in the signal transduction after hyperthermia, rather than the p27 pathway.
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Hirota J, Akiyama K, Taniyasu N, Iba Y. [A case of protruding atherosclerotic plaque with mobile projections in the sino-tubular junction]. KYOBU GEKA. THE JAPANESE JOURNAL OF THORACIC SURGERY 2001; 54:1059-61. [PMID: 11712379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
A 66-year-old woman who received maintenance hemodialysis for the last 14 years was referred to our hospital due to the sudden onset of ischemic stroke and systemic emboli. Transthoracic echocardiography before surgery showed large protruding masses measuring 2 cm which projected into the lumen of the aortic root. The plaque originated on a wide base of the posterior aspect of the ascending aorta at its junction with the sinus of Valsalva. The mobile plaque was surgically removed by endarterectomy from the posterior wall of sino-tubular junction under cardiopulmonary bypass. Pathologic examination of the masses removed at the time of surgery showed that they were atherosclerotic plaque with superimposed thrombi. During operation, transesophageal echocardiography appears to be useful for the rapid detection of a protruding aortic atheroma especially in the initial period of cardiopulmonary bypass until aortic cross clamp.
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Fukushima Y, Kumita S, Toba M, Cho K, Nakajo H, Mizumura S, Akiyama K, Kumazaki T. [Examination concerning dissociation of left ventricular volume calculation value based on difference of analytical algorithm and perfusion tracer in gated myocardial SPECT]. KAKU IGAKU. THE JAPANESE JOURNAL OF NUCLEAR MEDICINE 2001; 38:715-20. [PMID: 11806082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
According to improvement of SPECT system, ECG-gated SPECT with 201TlCl have been applied to the left ventricular volumetry. In this study 24 patients without ischemia demonstrated by stress (99mTc-TF) and rest (201TlCl) dual-isotope ECG-gated myocardial SPECT were enrolled. To evaluate left ventricular volumetry using 201Tl ECG-gated SPECT data, the left ventricular end diastolic volumes (EDV) were compared between Quantitative Gated SPECT (QGS) and Emory Cardiac Toolbox (ECT) as well as between dual-isotopes based on the same ECG-gated data. The EDV values with 99mTc data (EDVTc) using QGS were well correlated with those using ECT (r = 0.96, p < 0.0001). Both QGS and ECT demonstrated well correlation between EDVTc (r = 0.98, p < 0.0001) and the EDV value with 201Tl (EDVTl) (r = 0.93, p < 0.0001). However, QGS processing induced significantly lower EDVTl compared with EDVTc. In contrast, EDVTl were significantly higher than EDVTc in ECT performance. The QGS errors subtracting EDVTl from EDVTc were more evident according to the left ventricular volume increase. On the other hand, ECT error showed no tendency associated with the left ventricular volume. From these results, a careful strategy for selection of tracers and softwares should be necessary to assessment of quantitative values derived from ECG-gated SPECT data because of interaction with softwares, tracers, and subjects.
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Akiyama K, Taniyasu N, Hirota J, Iba Y, Maisawa K. Recurrent aortic valve endocarditis caused by Gemella morbillorum--report of a case and review of the literature. JAPANESE CIRCULATION JOURNAL 2001; 65:997-1000. [PMID: 11716255 DOI: 10.1253/jcj.65.997] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Gemella morbillorum (G. morbillorum) is part of the commensal flora of the oropharynx and intestinal tract, and on rare occasions causes infective endocarditis. A 55-year-old man with massive aortic regurgitation caused by recurrent infective endocarditis with G. morbillorum had a history of prior endocarditis caused by alpha-hemolytic streptococcus and multiple antibiotic allergies 5 years prior, and was successfully treated by aortic valve replacement. Almost all the reported cases of endocarditis caused by G. morbillorum have been bacteriologically cured with antibiotics and this is the first reported case of recurrent endocarditis caused by G. morbillorum in which the initial infection was bacteriologically cured by antibiotics and the secondary infection treated with valve replacement. This organism can be one of the causes of infective endocarditis and prompt surgical repair is mandatory if the infection is refractory or there is progression of congestive heart failure under antibiotic cover.
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Kawagishi Y, Oosaki R, Mita H, Maruyama M, Arai N, Taniguchi H, Kashii T, Yamashita N, Taniguchi M, Akiyama K, Kobayashi M. [Clinical significance of measurement of urinary leukotriene E4 in asthmatic patients without attack]. ARERUGI = [ALLERGY] 2001; 50:1096-101. [PMID: 11761885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
To evaluate clinical significance of measurement of urinary leukotriene E4 (LTE4) in asthmatic patients without attack, we measured urinary LTE4 in 68 asthmatic patients without attack and investigated its correlation with severity of asthma, % FEV1, bronchial hyperresponsiveness and peripheral eosinophil counts. Values of urinary LTE4 were significantly higher in the asthmatic patients (113.6 +/- 9.7 pg/mg.cr) than in healthy control subjects (67.8 +/- 4.7, n = 31), and the level of urinary LTE4 was in proportion to the severity of disease. Urinary LTE4 showed significant negative correlation with % FEV1 in atopic patients (Rs = -0.43, p = 0.025, n = 28), which was not recognized in non-atopic patients. Urinary LTE4 showed no significant correlation with bronchial hyperresponsiveness and peripheral eosinophil counts. Our findings suggested that basal LTE4 in urine reflected chronic airway inflammation of asthma.
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