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Ando T, Tsuyuguchi T, Okugawa T, Saito M, Ishihara T, Yamaguchi T, Saisho H. Risk factors for recurrent bile duct stones after endoscopic papillotomy. Gut 2003; 52:116-21. [PMID: 12477771 PMCID: PMC1773534 DOI: 10.1136/gut.52.1.116] [Citation(s) in RCA: 120] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND The long term outcome of endoscopic papillotomy (EPT) is not well known. The aims of this study were to clarify the clinical course of post-EPT patients and to detect predictors for bile duct stone recurrence. METHODS A total of 1042 consecutive patients who underwent EPT for bile duct stones from December 1975 to September 1998 were prospectively followed up. Patients were divided into four groups according to gall bladder (GB) status: "acalculous GB" group, "calculous GB" group, "cholecystectomy" group, and "prior cholecystectomy" group. Reliable follow up information was obtained for 983 (94.3%) of the 1042 patients. The following factors were considered in the evaluation of predisposing risk factors for recurrence of bile duct stones: age, sex, gall bladder status, periampullary diverticulum, number of bile duct stones, diameter of bile duct stones, diameter of bile duct, lithotripsy, precutting, pneumobilia, and early complications. RESULTS Recurrence occurred in 111 patients. The "acalculous GB" group was less prone to recurrence than the "prior cholecystectomy" group and the "calculous GB" group. The relative risks (RR) for the latter two compared with the former group were 2.26 (95% confidence interval (CI) 1.24-4.14; p=0.0078) and 2.16 (95% CI 1.21-3.87; p=0.0093), respectively. Other prognostic factors were lithotripsy (RR 2.37; 95% CI 1.47-3.81; p=0.0004) and pneumobilia (RR 1.57; 95% CI 1.01-2.43; p=0.044). CONCLUSIONS Gall bladder status, lithotripsy, and pneumobilia were significantly related to bile duct stone recurrence after EPT.
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102
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103
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Miyagawa S, Fukumoto T, Tsukaguchi N, Hoshii Y, Ishihara T. Myeloma-associated systemic amyloidosis presenting as digital nodules. Br J Dermatol 2002; 147:602. [PMID: 12207610 DOI: 10.1046/j.1365-2133.2002.04770.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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104
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Chen JCY, Ishihara T. Separable expansion for off-shell two-body t matrix with Coulomb potential. ACTA ACUST UNITED AC 2002. [DOI: 10.1088/0022-3700/2/1/303] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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105
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Inui T, Ishihara T, Morinaga N, Takeuchi G, Matsuda H, Takegami Y. Olefin synthesis from methanol on a modified zeolite catalyst. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/i300009a007] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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106
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107
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Ishihara T. [Becker muscular dystrophy]. RYOIKIBETSU SHOKOGUN SHIRIZU 2002:18-22. [PMID: 11555904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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108
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109
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Aikawa R, Nagai T, Tanaka M, Zou Y, Ishihara T, Takano H, Hasegawa H, Akazawa H, Mizukami M, Nagai R, Komuro I. Reactive oxygen species in mechanical stress-induced cardiac hypertrophy. Biochem Biophys Res Commun 2001; 289:901-7. [PMID: 11735132 DOI: 10.1006/bbrc.2001.6068] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mechanical stress induces various hypertrophic responses including activation of mitogen-activated protein kinases (MAPKs) in cardiac myocytes. Here we examined the role of the small GTP-binding proteins of Rho family and reactive oxygen species (ROS) in stretch-induced activation of p38MAPK in cardiomyocytes. Overexpression of dominant-negative mutants of Rac1 (D.N. Rac1), D.N.RhoA and D.N.Cdc42 suppressed stretch-induced activation of p38MAPK. Overexpression of constitutively active mutants of Rac1 (C.A.Rac1) and C.A.Cdc42 increased the p38MAPK activity in the absence of mechanical stress. Pretreatment with N-acetyl-L-cysteine and N-(2-mercaptopropionyl)-glycine (NAC) suppressed stretch-induced activation of p38MAPK. Mechanical stretch increased intracellular ROS generation, which was abrogated by overexpression of D.N.Rac1 and attenuated by overexpression of D.N.RhoA and D.N.Cdc42. An increase in protein synthesis evoked by mechanical stretch was suppressed by overexpression of D.N.Rac1 and pretreatment with NAC. These results suggest that mechanical stress induces cardiac hypertrophy through the Rac1-ROS-p38MAPK pathway in cardiac myocytes.
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110
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Ii M, Hoshiga M, Fukui R, Negoro N, Nakakoji T, Nishiguchi F, Kohbayashi E, Ishihara T, Hanafusa T. Beraprost sodium regulates cell cycle in vascular smooth muscle cells through cAMP signaling by preventing down-regulation of p27(Kip1). Cardiovasc Res 2001; 52:500-8. [PMID: 11738067 DOI: 10.1016/s0008-6363(01)00411-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
OBJECTIVE Beraprost sodium (BPS), a prostacyclin (PGI(2)) analogue, has been reported to exhibit beneficial effects on atherosclerosis in both human and animal models. To clarify the underlying mechanism, we investigated the effects of BPS on neointimal formation after balloon injury in the canine coronary artery. Furthermore, we determined its anti-atherosclerotic effects in cultured smooth muscle cells (SMCs). METHODS Adult beagle dogs (10-12 kg) were fed on a high-cholesterol diet (10 g/day) and underwent balloon-denudation of the coronary artery. The dogs were divided into two groups: a BPS-treated group (20 microg/kg per day) and a control group. Twenty-eight days after injury, the dogs were killed and the coronary arteries were examined morphometrically. Three days after injury, the proliferative activity in the medial layer of the coronary artery was evaluated by 5-bromo-2'-deoxyuridine (BrdU) incorporation, and p27(Kip1), a cyclin-dependent kinase (cdk) inhibitor, expression was examined by immunohistochemistry. We also examined the effects of BPS on SMC proliferation based on BrdU incorporation and cell cycle analysis. In addition, p27(Kip1) regulation was evaluated in primary-cultured SMCs. RESULTS BPS administration decreased the intima/media ratio (I/M) by 88% in the control group. Three days after injury, BPS attenuated the proliferation rate of the cells in the media of the coronary artery by 35%, and maintained p27(Kip1) expression, which declined in the control cells. In the cultured proliferating SMC, BPS prevented the down-regulation of p27(Kip1). The 8-bromo-cyclic adenosine monophosphate (8-br-cAMP), a cAMP analogue, had similar actions as BPS in the regulation of p27(Kip1). The proliferation of cultured SMC was inhibited in a dose-dependent manner, and cell cycle arrest in the G1 phase was induced by BPS. CONCLUSIONS Our data suggest that BPS inhibits neointimal formation after balloon denudation in the coronary artery through its inhibitory effect on SMC proliferation by preventing p27(Kip1) down-regulation.
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MESH Headings
- Angioplasty, Balloon, Coronary/adverse effects
- Animals
- Cell Cycle/drug effects
- Cell Division/drug effects
- Cells, Cultured
- Coronary Restenosis/drug therapy
- Coronary Restenosis/pathology
- Coronary Vessels
- Cyclic AMP/metabolism
- Dogs
- Epoprostenol/analogs & derivatives
- Epoprostenol/pharmacology
- Epoprostenol/therapeutic use
- Female
- Flow Cytometry
- Models, Animal
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Signal Transduction/drug effects
- Vasodilator Agents/pharmacology
- Vasodilator Agents/therapeutic use
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Ishihara T. [AA amyloidosis]. NIHON RINSHO. JAPANESE JOURNAL OF CLINICAL MEDICINE 2001; 59 Suppl 8:372-7. [PMID: 11808249] [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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112
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Yamaguchi T, Ishihara T, Saisho H, Okuda K. Hepatobiliary and pancreatic: awoman with a back pain and increased urinary amylase. J Gastroenterol Hepatol 2001; 16:1303, 1309. [PMID: 11903751 DOI: 10.1046/j.1440-1746.2001.2625a.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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113
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Kozuka T, Takenaka K, Shinagawa K, Masuda K, Ishihara T, Arimori Y, Fukunaga S, Maeda Y, Ishimaru F, Kiura K, Ikeda K, Niiya K, Harada M. Cytomegalovirus enteritis after autologous peripheral blood stem cell transplantation. Ann Hematol 2001; 80:617-9. [PMID: 11732876 DOI: 10.1007/s002770100362] [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: 11/30/2022]
Abstract
A 61-year-old male with non-Hodgkin's lymphoma (peripheral T-cell lymphoma, unspecified, clinical stage IVb) received autologous peripheral blood stem cell transplantation (PBSCT) during first remission. He was seropositive for cytomegalovirus (CMV) prior to autologous PBSCT. His posttransplant clinical course was complicated by refractory CMV enteritis, which manifested persistent abdominal pain, diarrhea, and bloody stool. Generally, gastrointestinal CMV disease is relatively rare after autologous PBSCT. However, our case indicates that CMV infection must be considered as a differential diagnosis in cases of unexplained hemorrhagic enteritis following autologous PBSCT.
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114
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Izumihara A, Ishihara T, Hoshii Y, Ito H. Cerebral amyloid angiopathy associated with hemorrhage: immunohistochemical study of 41 biopsy cases. Neurol Med Chir (Tokyo) 2001; 41:471-7; discussion 477-8. [PMID: 11760381 DOI: 10.2176/nmc.41.471] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The relationship between cerebral amyloid angiopathy and hemorrhage was investigated by an immunohistochemical study of biopsy cases to characterize the involvement of amyloid beta-protein, apolipoprotein E, and cystatin C in cerebral amyloid angiopathy associated with hemorrhage. The amyloid-laden vessels were examined in biopsy specimens from 41 surgical cases of sporadic cerebral amyloid angiopathy (36 cases with hemorrhage and 5 cases without hemorrhage), using immunohistochemical staining with antibodies against amyloid beta-protein, apolipoprotein E, cystatin C, and alpha-smooth muscle actin. The relationship between the occurrence, recurrence, and enlargement of the hemorrhage, and the semiquantitative estimation of the cerebrovascular amyloid-related protein deposition was analyzed using Fisher's exact test. Severe amyloid beta-protein (p < 0.013) and apolipoprotein E (p < 0.013) immunoreactivity were risk factors for the occurrence of the hemorrhage. Severe cystatin C immunoreactivity was a risk factor for the occurrence (p < 0.002) and enlargement (p < 0.014) of the hemorrhage, and tended to induce recurrent hemorrhage (p < 0.103). In addition, loss of the vascular smooth muscle was observed in the intensely amyloid-laden vascular walls that showed cystatin C-immunoreactivity. The present study indicates that intense amyloid beta-protein deposition with cystatin C deposition weakens the cerebrovascular walls, and that cystatin C deposition is a strong predictor of hemorrhage in cerebral amyloid angiopathy.
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115
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Ishihara T, Higuchi M, Zhang B, Yoshiyama Y, Hong M, Trojanowski JQ, Lee VM. Attenuated neurodegenerative disease phenotype in tau transgenic mouse lacking neurofilaments. J Neurosci 2001; 21:6026-35. [PMID: 11487626 PMCID: PMC6763173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023] Open
Abstract
Previous studies have shown that transgenic (Tg) mice overexpressing human tau protein develop filamentous tau aggregates in the CNS. The most abundant tau aggregates are found in spinal cord and brainstem in which they colocalize with neurofilaments (NFs) as spheroids in axons. To elucidate the role of NF subunit proteins in tau aggregate formation and to test the hypothesis that NFs are pathological chaperones in the formation of intraneuronal tau inclusions, we crossbred previously described tau (T44) Tg mice overexpressing the smallest human tau isoform with knock-out mice devoid of NFL (NFL-/-) or NFH (NFH-/-). Depletion of NF subunit proteins from the T44 mice (i.e., T44;NFL-/- and T44;NFH-/-), in particular NFL, resulted in a dramatic decrease in the total number of tau-positive spheroids in spinal cord and brainstem. Concomitant with the reduction in spheroid number, the bigenic mice showed delayed accumulation of insoluble tau protein in the CNS, increased viability, reduced weight loss, and improved behavioral phenotype when compared with the single T44 Tg mice. These results imply that NFs are pathological chaperones in the development of tau spheroids and suggest a role for NFs in the pathogenesis of neurofibrillary tau lesions in neurodegenerative disorders that contain both NFs and tau proteins.
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116
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Noma T, Fujisawa K, Yamashiro Y, Shinohara M, Nakazawa A, Gondo T, Ishihara T, Yoshinobu K. Structure and expression of human mitochondrial adenylate kinase targeted to the mitochondrial matrix. Biochem J 2001; 358:225-32. [PMID: 11485571 PMCID: PMC1222051 DOI: 10.1042/0264-6021:3580225] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The previously isolated cDNA encoding human adenylate kinase (AK) isozyme 3 was recently renamed AK4. Consequently, human AK3 cDNA remains to be identified and we have little information about the functional relationship between human AK3 and AK4. In pursuit of the physiological roles of both the AK3 and AK4 proteins, we first isolated an authentic human AK3 cDNA and compared their expression. Nucleotide sequencing revealed that the cDNA encoded a 227-amino-acid protein, with a deduced molecular mass of 25.6 kDa, that shares greater homology with the AK3 cDNAs isolated from bovine and rat than that from human. We named the isolated cDNA AK3. Northern-blot analysis revealed that AK3 mRNA was present in all tissues examined, and was highly expressed in heart, skeletal muscle and liver, moderately expressed in pancreas and kidney, and weakly expressed in placenta, brain and lung. On the other hand, we found that human AK4 mRNA was highly expressed in kidney, moderately expressed in heart and liver and weakly expressed in brain. Western-blot analysis demonstrated expression profiles of AK3 and AK4 that were similar to their mRNA expression patterns in each tissue. Over expression of AK3, but not AK4, in both Escherichia coli CV2, a temperature-sensitive AK mutant, and a human embryonic kidney-derived cell line, HEK-293, not only produced significant GTP:AMP phosphotransferase (AK3) activity, but also complemented the CV2 cells at 42 degrees C. Subcellular and submitochondrial fractionation analysis demonstrated that both AK3 and AK4 are localized in the mitochondrial matrix.
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117
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Soma M, Tamaoki T, Kawano H, Ito S, Sakamoto M, Okada Y, Ozaki Y, Kanba S, Hamada Y, Ishihara T, Maeda S. Mice lacking serum amyloid P component do not necessarily develop severe autoimmune disease. Biochem Biophys Res Commun 2001; 286:200-5. [PMID: 11485329 DOI: 10.1006/bbrc.2001.5364] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Serum amyloid P component (SAP) is a major acute-phase reactant in mice. Recently, it was reported that SAP-deficient mice spontaneously developed anti-nuclear antibodies and severe glomerulonephritis. Because the SAP-deficient mice we generated display no obvious phenotypic abnormalities, we investigated whether our SAP-deficient mice would also spontaneously develop autoimmune responses. In accordance with the report, our mice produced high titers of anti-nuclear antibody but did not develop severe glomerulonephritis. On the other hand, it was recently reported that SAP bound to gram-negative bacteria via lipopolysaccharide (LPS) prevented LPS-mediated activation of a classical complement pathway. Thus, we asked if SAP-deficient mice would show altered responses to an intraperitoneal injection of LPS from Salmonella typhimirium. SAP-deficiency did afford resistance to lethality induced by high-dose LPS. Our experiments clearly showed that contrary to documented data, SAP-deficient mice do not develop serious autoimmune disease and we suggest that SAP has a critical role in LPS toxicity.
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Okamura H, Kamei T, Mitsuno A, Hongo H, Sakuma N, Ishihara T. Localized malignant mesothelioma of the pleura. Pathol Int 2001; 51:654-60. [PMID: 11564223 DOI: 10.1046/j.1440-1827.2001.01250.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
We describe a case of malignant pleural mesothelioma appearing as a solitary pleural tumor in a 56-year-old Japanese man with no history of exposure to asbestos. A chest radiograph revealed an isolated extrapulmonary mass in the left hemithorax. The patient underwent tumor resection, but the tumor later recurred on the contralateral pleura. The patient developed cerebral metastases and died 16 months after the initial surgery. The resected tumor was sessile with broad-based pleural attachment. Microscopically, the tumor was composed of interlacing fascicles of plump spindle cells intermixed with few polygonal cells. Most of the tumor cells showed positive immunoreactivity for cytokeratins (AE1 and AE3) and vimentin. Many of the tumor cells were positive for epithelial membrane antigen, and a few were positive for desmin. In contrast, the tumor cells were consistently negative for carcinoembryonic antigen, epithelial antigen BerEP4, calretinin, S-100 protein, neuron-specific enolase, muscle actin antigen HHF35, alpha-smooth muscle actin antigen and CD34. Ultrastructurally, the tumor cells had diffusely distributed cytoplasmic intermediate filaments, desmosome-like junctions, and a few microvilli. Some tumor cells contained cytoplasmic tonofilaments. Immunohistochemical and ultrastructural findings supported the mesothelial nature of the tumor, and led us to diagnose this tumor as a sarcomatoid localized malignant mesothelioma.
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119
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Ishihara T, Araki T, Sakuma Y. Two distinct populations of neurons expressing nitric oxide synthase mRNA in the female rat preoptic area: site specific changes induced by sex steroids. J NIPPON MED SCH 2001; 68:328-34. [PMID: 11505280 DOI: 10.1272/jnms.68.328] [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: 11/19/2022]
Abstract
Non-isotopic in situ hybridization histochemistry in the basal forebrain of gonadectomized juvenile female rats visualized neuronal nitric oxide synthase (nNOS) mRNA in two distinct cellular populations, one in the organum vasculosum of the lamina terminals (OVLT) and the other in the rostral preoptic area at the level of the anteroventral periventricular nucleus (rPOA). In the rPOA, digoxigenin-labeled nNOS mRNA positive cells were in close proximity to the cell body of gonadotropin-releasing hormone (GnRH) -immunoreactive neurons. In the OVLT, the labeled cells were in an area rich in GnRH fibers. In the frontal section of the rPOA, the labeled cells were distributed in an inverted V-shaped area over the third ventricle. Combined treatment with estradiol and progesterone caused a significant reduction in the number of nNOS mRNA positive cells in the inverted V-shaped area in the female rat rPOA. The treatment induced a luteinizing hormone surge at the time of sacrifice. In the OVLT, ovarian steroids had no effect on nNOS mRNA expression. The results indicate that nNOS mRNA expression in the rPOA is regulated by ovarian steroids in a site-specific manner.
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120
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Kageshita T, Hamby CV, Ishihara T, Matsumoto K, Saida T, Ono T. Loss of beta-catenin expression associated with disease progression in malignant melanoma. Br J Dermatol 2001; 145:210-6. [PMID: 11531781 DOI: 10.1046/j.1365-2133.2001.04336.x] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND beta-catenin plays a crucial role in the function of cell adhesion molecules and also participates in growth regulatory signalling pathways that may be involved in malignant transformation. OBJECTIVES To examine beta-catenin expression in lesions of melanocytic origin for associations with clinicopathological markers of disease progression and for its significance as a predictor of disease recurrence and prognosis. METHODS beta-catenin expression was examined by immunoperoxidase staining in 50 melanocytic naevi and 91 primary and 50 metastatic melanomas. RESULTS beta-catenin was expressed in 96% of melanocytic naevi, in 94% and 65%, respectively, of radial and vertical growth phase primary melanomas, and in 38% of metastatic melanomas. Benign and malignant melanocytic lesions had distinct patterns of beta-catenin localization. Most lesions expressing beta-catenin exhibited cytoplasmic staining; however, over 40% of benign lesions also displayed nuclear staining, which was present only in 10% of primary and 15% of metastatic melanomas. Absent or weak expression of beta-catenin in primary melanomas was associated with several markers of disease progression, including tumour thickness and presence of lymph node metastases. A similar but not statistically significant trend was observed for the association of beta-catenin expression with disease recurrence and prognosis. CONCLUSIONS These results suggest that loss or downregulation of beta-catenin expression in melanoma cells plays a significant role in progression of the disease.
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121
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Ariga S, Koga M, Takahashi M, Ishihara T, Matsubara T, Furukawa S. Maturation of macrophages from peripheral blood monocytes in Kawasaki disease: immunocytochemical and immunoelectron microscopic study. Pathol Int 2001; 51:257-63. [PMID: 11350607 DOI: 10.1046/j.1440-1827.2001.01202.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Kawasaki disease (KD) is regarded as a cytokine-associated disorder. Despite intensive investigation into the etiology of KD, this remains unclear, although monocytes and macrophages are thought to play an important role. We examined peripheral blood monocytes using a monoclonal antibody, PM-2K, which recognizes mature macrophages but not monocytes. This study was conducted in 12 patients with KD, three patients with sepsis and 12 control subjects. Approximately 8% of whole peripheral blood monocytes from patients with acute KD were observed to be PM-2K positive. Approximately 15-20% of peripheral blood CD14+ monocytes from these patients were positive for PM-2K antibody (as determined by immunoelectron microscopy). PM-2K-positive monocytes had significantly fewer numbers of intracytoplasmic peroxidase-positive granules than monocytes from control subjects. In contrast, PM-2K-negative monocytes from patients with acute KD had a significantly greater number of peroxidase-positive granules in the cytoplasm than in those from controls. Monocytes from patients with sepsis displayed PM-2K immunocytochemical staining, similar to that in monocytes from patients with KD. These results suggest that during the acute stage of KD, monocytes partly differentiate into macrophages in the peripheral circulation.
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122
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Hayashi YK, Ogawa M, Tagawa K, Noguchi S, Ishihara T, Nonaka I, Arahata K. Selective deficiency of alpha-dystroglycan in Fukuyama-type congenital muscular dystrophy. Neurology 2001; 57:115-21. [PMID: 11445638 DOI: 10.1212/wnl.57.1.115] [Citation(s) in RCA: 173] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Fukuyama-type congenital muscular dystrophy (FCMD) is an autosomal recessive disorder characterized by severe dystrophic muscle wasting from birth or early infancy with structural brain abnormalities. The gene for FCMD is located on chromosome 9q31, and encodes a novel protein named fukutin. The function of fukutin is not known yet, but is suggested to be an enzyme that modifies the cell-surface glycoprotein or glycolipids. OBJECTIVE To elucidate the roles of fukutin gene mutation in skeletal and cardiac muscles and brain. METHODS Immunohistochemical and immunoblot analyses were performed in skeletal and cardiac muscles and brain tissue samples from patients with FCMD and control subjects. RESULTS The authors found a selective deficiency of highly glycosylated alpha-dystroglycan, but not beta-dystroglycan, on the surface membrane of skeletal and cardiac muscle fibers in patients with FCMD. Immunoblot analyses also showed no immunoreactive band for alpha-dystroglycan, but were positive for beta-dystroglycan in FCMD in skeletal and cardiac muscles. CONCLUSION The current findings suggest a critical role for fukutin gene mutation in the loss or modification of glycosylation of the extracellular peripheral membrane protein, alpha-dystroglycan, which may cause a crucial disruption of the transmembranous molecular linkage of muscle fibers in patients with FCMD.
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Abstract
Atelocollagen sponge had been developed as a new beneficial dermal substitute. However, histologic studies of the vascularity of an atelocollagen sponge substitute dermis in humans are very rare. The purpose of this study was to determine the distribution of blood vessels in an artificial dermis made of atelocollagen affixed to human tissue. The artificial dermis was used in 21 cases and at 23 sites, and biopsies were performed. The samples were stained with anti-human blood type A, B, and H monoclonal antibodies. Angiogenesis in the upper layer of the artificial dermis was recognizable within 14 days after affixing the artificial dermis. We concluded that a skin graft taken 14 days after affixing the artificial dermis would be successful, even though the granulation tissue formation might not be completed and the color would most likely remain white. The lower layer of the angiogenesis spread in a horizontal direction like an expanded network of blood vessels, while the middle and upper layers of angiogenesis spread perpendicularly to form upward growth when two cases were examined in various spots. The data suggested that the sponge construction of artificial dermis not only became a scaffold for the invasion of collagen, but it also facilitated construction of near normal dermis with regard to the construction of blood vessels.
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Abstract
In 30 cases of melanoma, we attempted to detect sentinel lymph nodes using 1-2% patent blue dye and were able to detect them in 27 cases (90%): 19 cases out of 21 cases in the groin area (90%), 5 out of 5 cases in the axilla area (100%), and 3 out of 4 cases in the neck area (75%). The numbers of sentinel lymph nodes were one in 16 cases, two in 7 cases, three in 2 cases, and four in 2 cases. The cases with three and four nodes were all in the groin area. In 22 cases, tumor metastasis was negative in sentinel lymph nodes. Sentinel lymph nodes were detected in 36 out of 174 samples, and tumor metastasis was negative except in these sentinel lymph nodes (false negative 0%). In the groin area, sentinel lymph nodes were located around the femoral and great saphenous vein junction. In the axilla area, sentinel lymph nodes were located in the central, lateral and subscapular lymph nodes. In the head and neck area, sentinel lymph nodes were found in the submandibular and occipital lymph nodes. The positions of sentinel lymph nodes differed a little with tumor location. By accumulating cases, it should become possible to predict the positions of sentinel lymph nodes before operations. Sentinel lymph node biopsy is easy and requires only a small incision.
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125
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Hashimoto K, Hoshii Y, Takahashi M, Mitsuno S, Hanai N, Watanabe Y, Ishihara T. Use of a monoclonal antibody against Lafora bodies for the immunocytochemical study of ground-glass inclusions in hepatocytes due to cyanamide. Histopathology 2001; 39:60-5. [PMID: 11454045 DOI: 10.1046/j.1365-2559.2001.01127.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS Ground-glass inclusions (GGIs) in hepatocytes are known to be associated with cyanamide treatment in patients with alcohol dependency. The purpose of this study was to assess the reactivity of a monoclonal antibody (MAb) raised against polyglucosan and to detect early events in GGI formation. METHODS AND RESULTS Formalin-fixed paraffin-embedded liver tissues from four patients treated with cyanamide were used. Sections were stained with haematoxylin and eosin and periodic acid-Schiff with and without diastase digestion, and were immunohistochemically stained with the MAb. For electron microscopic study, routinely processed liver tissue from one patient was examined with conventional and immunoelectron microscopy with use of the MAb. All specimens from the four cyanamide-treated patients contained GGIs in the cytoplasm of hepatocytes, and these GGIs reacted intensely with the MAb. Fully developed GGIs contained various organelles, whereas early ones consisted primarily of glycogen granules and dilated smooth endoplasmic reticulum. In immunoelectron microscopic preparations, gold particles were located within GGIs, and the immunolabelled organelles appeared to be glycogen granules. CONCLUSIONS This novel MAb is useful for the detection of GGIs caused by cyanamide. Our results support the idea that GGI formation may result from specific abnormalities in glucose metabolism.
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