76
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Kusumoto N, Murayama T, Kawai Y, Ashitani T, Ogiyama K, Takahashi K. Taxodal, a novel irregular abietane-type diterpene from the cones of Taxodium distichum. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.06.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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77
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Hiramatsu F, Murayama T, Koseki T, Okada K, Shiono Y. Cadinane-Type Sesquiterpenoids, Strobilols E - K, from the Liquid Culture ofStrobilurus ohshimae. Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890173] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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78
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Hiramatsu F, Murayama T, Koseki T, Shiono Y. A new secolactarane-type sesquiterpene fromStrobilurus tephanocystis. Nat Prod Res 2008; 22:1001-1006. [DOI: 10.1080/14786410701654834] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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79
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Yamamoto K, Kimura H, Murayama T, Kashima T, Kikuchi Y, Akiyama T, Kawano H, Miyata T, Nagawa H. Chronic expanding hematoma in combination with a pseudoaneurysm: a case report. INT ANGIOL 2008; 27:266-268. [PMID: 18506131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
After bleeding from trauma or surgery, most of the hematomas undergo spontaneous reabsorption. But, in some rare cases, hematomas persist for long periods as slowly expanding masses for months or years. These hematomas were termed as chronic expanding hematomas. In this report, we describe a case of chronic expanding hematoma with a pseudoaneurysm that underwent surgical biopsy, which led to an increase in its expansion speed.
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80
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Tamura Y, Sugimoto M, Murayama T, Kita T, Yokode M, Arai H. PHARCOLOGICAL BLOCKADE OF CCR2 INHIBITS THE DEVELOPMENT OF INSULIN RESISTANCE AND HEPATIC STEATOSIS IN DB/DB MICE. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70046-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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81
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Arai H, Sugimoto M, Tamura Y, Murayama T, Kamei K, Kita T, Yokode M. MULBERRY LEAF AMELIORATES INSULIN RESISTANCE BY INHIBITING OXIDATIVE STRESS IN WHITE ADIPOSE TISSUE IN DB/DB MICE. ATHEROSCLEROSIS SUPP 2008. [DOI: 10.1016/s1567-5688(08)70686-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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82
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Takeuchi F, Nakaue N, Kobayashi N, Kuwata S, Murayama T, Kawasugi K, Mori M, Matsuta K. Genetic contribution of the CD14 -159C/T dimorphism in the promoter region in Japanese RA. Clin Exp Rheumatol 2008; 26:337-339. [PMID: 18565258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
OBJECTIVE To study the contribution of the CD14 gene to the pathogenesis of rheumatoid arthritis (RA) in Japanese patients. METHODS CD14 genotyping was carried out at the -159C/T dimorphic site in 97 RA patients and 104 normal subjects by the PCR-RFLP (restriction fragment length polymorphism) METHOD HLA-DRB1 genotyping was performed by the PCR-SSCP (sequence specific conformational polymorphism) method. RESULTS The -159C/T dimorphism is not associated with whole RA or with female RA, and the results were compatible with a previous report from Germany. The -159C/T dimorphism was not associated with rheumatoid factor (RF)-positive RA, although the -159T allele tended to be associated with RF in the German report. The -159C/T dimorphism showed no association even in RA patients with the RA-susceptibility HLA-DRB1*0405. The -159T allele was prevalent in Japanese controls. CONCLUSION The CD14 gene is very unlikely to be genetically involved in the pathogenesis of Japanese RA.
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83
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Koseki T, Mese Y, Fushinobu S, Masaki K, Fujii T, Ito K, Shiono Y, Murayama T, Iefuji H. Biochemical characterization of a glycoside hydrolase family 61 endoglucanase from Aspergillus kawachii. Appl Microbiol Biotechnol 2008; 77:1279-85. [DOI: 10.1007/s00253-007-1274-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2007] [Revised: 10/31/2007] [Accepted: 11/01/2007] [Indexed: 10/22/2022]
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84
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Shiono Y, Tsuchinari M, Shimanuki K, Miyajima T, Murayama T, Koseki T, Laatsch H, Funakoshi T, Takanami K, Suzuki K. Fusaristatins A and B, two new cyclic lipopeptides from an endophytic Fusarium sp. J Antibiot (Tokyo) 2007; 60:309-16. [PMID: 17551209 DOI: 10.1038/ja.2007.39] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Two new cyclic lipopeptides, fusaristatins A (1) and B (2) were isolated from rice cultures of a Fusarium sp. YG-45 in the course of a screening of endophytic fungi. Their structures of 1 and 2 were determined by spectroscopic methods. 2 showed a moderate inhibitory effect on topoisomerases I (IC50: 73 microM) and II (IC50: 98 microM) without cleavable complexes. Furthermore, 1 and 2 showed the growth-inhibitory activity toward lung cancer cells LU 65 with IC50 values of 23 and 7 microM, respectively.
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85
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Shiono Y, Sugawara H, Nazarova M, Murayama T, Takahashi K, Ikeda M. Three lanostane triterpenoids, aeruginosols A, B and C, from the fruiting bodies of Stropharia aeruginosa. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2007; 9:531-5. [PMID: 17885840 DOI: 10.1080/10286020600882254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Phytochemical analysis of the MeOH extract of the fruiting bodies of Stropharia aeruginosa resulted in the isolation of three lanostane triterpenoids, aeruginosols A, B and C. The structures of the new compounds were determined by spectroscopic analysis. The biological activities of aeruginosols A, B and C were examined by bioassay with lettuce seedling.
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86
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Hiramatsu F, Murayama T, Koseki T, Shiono Y. Strobilols A-D: four cadinane-type sesquiterpenes from the edible mushroom Strobilurus ohshimae. PHYTOCHEMISTRY 2007; 68:1267-71. [PMID: 17350658 DOI: 10.1016/j.phytochem.2007.01.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2006] [Revised: 12/14/2006] [Accepted: 01/26/2007] [Indexed: 05/14/2023]
Abstract
Four sesquiterpenoids--strobilols A (1), B (2), C (3), and D (4)--were isolated from the organic extracts of fruiting bodies of the edible mushroom Strobilurus ohshimae. Their structures were determined by spectroscopic methods. Compound 1 exhibited moderate activity against the brine shrimp Artemia salina. This paper is the first report on isolation of cadinane-type sesquiterpenoids from S. ohshimae.
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87
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Hiramatsu F, Miyajima T, Murayama T, Takahashi K, Koseki T, Shiono Y. Isolation and Structure Elucidation of Neofusapyrone from a Marine-derived Fusarium species, and Structural Revision of Fusapyrone and Deoxyfusapyrone. J Antibiot (Tokyo) 2006; 59:704-9. [PMID: 17256469 DOI: 10.1038/ja.2006.94] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Three polyketides containing a pyrone ring, neofusapyrone, fusapyrone, and deoxyfusapyrone, were isolated from the marine-derived fungus Fusarium sp. FH-146. Their structures were determined by extensive ID- and 2D-NMR and MS spectral analyses. Fusapyrone and deoxyfusapyrone were originally reported as a-pyrone derivatives; however, the revised structures indicate that they are gamma-pyrone derivatives. These three compounds exhibited antimicrobial activities.
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88
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Takeuchi F, Kawasugi K, Mori M, Nakaue N, Kobayashi N, Kuwata S, Murayama T, Matsuta K. The genetic contribution of CTLA-4 dimorphisms in promoter and exon 1 regions in Japanese patients with rheumatoid arthritis. Scand J Rheumatol 2006; 35:154-5. [PMID: 16641053 DOI: 10.1080/03009740500407651] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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89
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Nikawa H, Egusa H, Makihira S, Okamoto T, Kurihara H, Shiba H, Amano H, Murayama T, Yatani H, Hamada T. An in vitro evaluation of the adhesion of Candida species to oral and lung tissue cells. Mycoses 2006; 49:14-7. [PMID: 16367812 DOI: 10.1111/j.1439-0507.2005.01176.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The analysis of the adherence capacity of fungi to surfaces of both oral tissue and different tissues would be of interest in the fungal dissemination as an oral and systemic pathogen. We developed an in vitro adenosine triphosphate (ATP)-based assay technique to extract the cellular and fungal ATP separately, which allowed the quantitative evaluation of the adhesion of the yeast to monolayers of human gingival epithelial cells (GEC), gingival fibroblasts (GF) and pulmonary fibroblasts (PF). Seven oral isolates of Candida species (three of Candida albicans, three of Candida tropicalis and one of Candida glabrata) were used in the study. The adherent level of the Candida species varied depending on both the isolates and the cell origins, although all the Candida isolates had a significantly higher level of adherence to GEC than to GF except the single isolate of C. tropicalis. Whereas the adherent level of the five isolates to GEC was significantly higher than that to PF, the adherent level of the remaining two isolates of C. tropicalis to GEC was significantly lower than that to PF. These results suggest that candidal adherence to host tissue cells should be regulated in an isolate-dependent and cell-origin-dependent manner, and that the phenomena may be involved in the colonisation and/or dissemination of the fungi.
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90
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Murayama T, Sato Y, Wainai T, Enomoto A, Seo N, Yoshino H, Kobayashi E. Effect of continuous infusion of propofol on its concentration in blood with and without the liver in pigs. Transplant Proc 2006; 37:4567-70. [PMID: 16387172 DOI: 10.1016/j.transproceed.2005.11.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2004] [Indexed: 11/30/2022]
Abstract
In living donor liver transplantation, propofol, an intravenous anesthetic drug, has recently been used in both donors and recipients. Propofol is known to have intra- and extrahepatic metabolic pathways, but the effect of its continuous infusion during a long-term anhepatic state is yet to be determined. Recently, we successfully established a simplified pig model of the complete anhepatic state. In this state, we first evaluated hemodynamic parameters relating to the pharmacokinetics of continuously infused propofol (6 mg.kg(-1) x h(-1)). No significant changes in the concentration of hemoglobin or in hemodynamic parameters other than the heart rate were observed during the anhepatic phase when porpofol was continuously infused at the rate that maintains the state. Blood propofol concentrations in the mixed vein, artery, and portal vein were stable during the anhepatic phase. Finally, we confirmed the pharmacokinetics of continuously infused propofol using orthotropic liver transplantation in miniature pigs. The propofol concentration did not change markedly during the transplant procedure. In conclusion, the pharmacokinetics of continuously infused propofol was almost stable with and without the liver in pigs. Extrahepatic metabolism of propofol might help prevent changes in propofol concentrations.
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91
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Akamizu T, Murayama T, Teramukai S, Miura K, Bando I, Irako T, Iwakura H, Ariyasu H, Hosoda H, Tada H, Matsuyama A, Kojima S, Wada T, Wakatsuki Y, Matsubayashi K, Kawakita T, Shimizu A, Fukushima M, Yokode M, Kangawa K. Plasma ghrelin levels in healthy elderly volunteers: the levels of acylated ghrelin in elderly females correlate positively with serum IGF-I levels and bowel movement frequency and negatively with systolic blood pressure. J Endocrinol 2006; 188:333-44. [PMID: 16461559 DOI: 10.1677/joe.1.06442] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Aging is associated with a decrease in growth hormone (GH) secretion, appetite and energy intake. As ghrelin stimulates both GH secretion and appetite, reductions in ghrelin levels may be involved in the reductions in GH secretion and appetite observed in the elderly. However, only preliminary studies have been performed on the role of ghrelin in elderly subjects. In this study, we sought to clarify the physiologic implications of the age-related alterations in ghrelin secretion by determining plasma ghrelin levels and other clinical parameters in healthy elderly subjects. Subjects were > or = 65 years old, corresponding to the SENIEUR protocol, had not had a resection of the upper gastrointestinal tract and had not been treated with hormones. One hundred and five volunteers (49 men and 56 women) were admitted to this study (73.4 +/- 6.3 years old). Plasma levels of acylated ghrelin in elderly female subjects positively correlated with serum IGF-I levels and bowel movement frequency and negatively with systolic blood pressure. In elderly men, desacyl ghrelin levels correlated only weakly with bowel movement frequency. These findings suggest that the plasma levels of the acylated form of ghrelin may influence the age-related alterations in GH/IGF-I regulation, blood pressure and bowel motility. These observational associations warrant further experimental studies to clarify the physiologic significance of these effects.
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92
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Shiono Y, Sugasawa H, Kurihara N, Nazarova M, Murayama T, Takahashi K, Ikeda M. Three lanostane triterpenoids from the fruiting bodies of Stropharia aeruginosa. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2005; 7:735-40. [PMID: 16176906 DOI: 10.1080/1028602042000325546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Three new lanostane triterpenoids, aeruginosic acid derivatives, were isolated from the fruiting bodies of Stropharia aeruginosa and their structures were determined on the basis of spectral data.
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93
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Suzuki S, Murayama T, Shiono Y. Illudalane sesquiterpenoids, echinolactones A and B, from a mycelial culture of Echinodontium japonicum. PHYTOCHEMISTRY 2005; 66:2329-33. [PMID: 16081114 DOI: 10.1016/j.phytochem.2005.06.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2005] [Revised: 05/02/2005] [Indexed: 05/03/2023]
Abstract
Illudalane sesquiterpenoids, echinolactones A and B, were isolated from the culture broth of the fungus Echinodontium japonicum, and their structures spectroscopically determined.
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94
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Shiono Y, Tamesada Y, Muravayev YD, Murayama T, Ikeda M. N-Phenethylhexadecanamide from the edible mushroom Laetiporus sulphureus. Nat Prod Res 2005; 19:363-6. [PMID: 15938143 DOI: 10.1080/14786410412331280113] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
N-Phenethylhexadecanamide was isolated from the MeOH extract of the fruiting bodies of the mushroom Laetiporus sulphureus together with eburicoic acid. Their structures were elucidated by spectroscopic methods.
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95
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Takeuchi F, Nabeta H, Hong GH, Kawasugi K, Mori M, Matsuta K, Kuwata S, Murayama T, Nakano K. The genetic contribution of the TNFa11 microsatellite allele and the TNFb + 252*2 allele in Japanese RA. Clin Exp Rheumatol 2005; 23:494-8. [PMID: 16095118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
OBJECTIVES The contribution of the microsatellite polymorphisms of TNFa and TNFb, and the TNFB + 252 (TNFB) dimorphism to the pathogenesis of rheumatoid arthritis (RA) was studied among Japanese patients. METHODS The TNFa and TNFb microsatellite polymorphisms, and the TNFB dimorphism were determined in Japanese RA patients and normal subjects using electrophoresis followed by specific PCR amplification. HLA-DRB1*04 typing was carried out by the PCR-SSCP method. RESULTS The allele frequency of TNFa11 showed a significant increase in RA with DRB1*0405 when compared to that in RA without DRB1*0405 (28.5% Vs 12.9%, respectively, p = 0.022). An association analysis indicated that TNFa11 was not primary, but secondary to the increase in HLA-DRB1*0405, because TNFa11 showed a strong positive association with HLA-DRB1*0405 in Japanese controls. The slight increase in the TNFb4 allele observed in RA with DRB1*0405 (50.0%) may be reflective of the increase in TNFa11 and DRB1*0405. In RA with DRB1*0405, the allele frequency of TNFB*2 significantly increased compared to that of normal controls (75.0% Vs 55.3%, respectively, p = 0.007) and compared to that of RA without DRB1*0405 (45.0%, p = 0.001). No significant positive association of TNFB*2 with HLA-DRB1*0405 or TNFa11 in Japanese controls might suggest that the increase in the TNFB*2 allele might not be secondary to the increase in DRB1*0405, and that TNFB*2 might contribute additively to DRB1*0405-positive RA in Japanese. CONCLUSION TNFB*2 may contribute additively to Japanese RA with HLA-DRB1*0405, while TNFa11 and TNFb4 are not independent genetic markers of RA among Japanese.
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96
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Komiya K, Sato Y, Wainai T, Murayama T, Yamada M, Hiruta A, Seo N, Yoshino H, Tanaka H, Kobayashi E. Evaluation of Intraoperative Infusion Solution Using a Complete Anhepatic Model in Baby Pigs. Transplant Proc 2005; 37:2341-6. [PMID: 15964412 DOI: 10.1016/j.transproceed.2005.03.104] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2004] [Indexed: 12/16/2022]
Abstract
Compared to cadaveric liver transplantation, living-related liver transplantation (LRLT) has the physiological advantage of avoiding hemodynamic changes due to the nonsystemic clamping of the inferior vena cava (IVC). However, metabolic changes in the level of blood glucose and lactate usually occur during the anhepatic phase in LRLT. For pediatric patients, intraoperative infusions have the potential to maintain immature homeostasis during LRLT. In the present study, a complete anhepatic model of baby pigs with nonsystemic clamping of IVC, which mimics the procedure of pediatric LRLT, was established using a heparin-coated tube as an internal shunt lactate Ringer solution (LR, Lactec), acetate Ringer solution (AR, VeenF), and a solution comprising acetate Ringer with 1% glucose (AR-G, Phisio140) were tested using piglets. Hemodynamic and metabolic (blood gas analysis, electrolytes, blood lactate, and glucose) changes were observed during the anhepatic phase. Although no major difference was observed in hemodynamic parameters, arterial blood gas data, or concentration of electrolytes among the three solution groups, significant progressive hyperlactatemia was observed in the LR group. Also, though severe hypoglycemia was found in the LR and AR groups, the AR-G group maintained blood glucose levels throughout the anhepatic phase. To conclude, using the simplified pig anhepatic model, we evaluated various solutions for pediatric LRLT.
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97
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Shiono Y, Suzuki S, Murayama T, Ikeda M, Abe Y. Protoilludane Sequiterpenoids, Echinocidins C and D Produced by a Decay Causing Fungal Strain Echinodontium tsugicola. ACTA ACUST UNITED AC 2005. [DOI: 10.1515/znb-2005-0416] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
New protoilludane sequiterpenoids, echinocidins C (3) and D (4) have been isolated from liquid culture of Echinodontium tsugicola. Their structures have been established on the basis of spectral analysis. The biological activities of 3 and 4 were examined by bioassay with lettuce seedlings
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98
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Shiono Y, Murayama T, Takahashi K, Okada K, Katohda S, Ikeda M. Three oxygenated cyclohexenone derivatives produced by an endophytic fungus. Biosci Biotechnol Biochem 2005; 69:287-92. [PMID: 15725652 DOI: 10.1271/bbb.69.287] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Three cyclohexenone derivatives, (4S,5S,6S)-5,6-epoxy-4-hydroxy-3-methoxy-5-methyl-cyclohex-2-en-1-one (1), (4R,5R)-4,5-dihydroxy-3-methoxy-5-methyl-cyclohex-2-en-1-one (2), and (4R,5S,6R)-4,5,6-trihydroxy-3-methoxy-5-methyl-cyclohex-2-en-1-one (3), were isolated from unpolished rice fermented with an xylariaceous endophytic fungus (strain YUA-026). The structures of three compounds were established on the basis of spectroscopic analyses and chemical conversion. The minimum inhibitory concentrations of 1 and 3 were 100 microg/ml and 400 microg/ml against Staphylococcus aureus, 100 microg/ml and 200 microg/ml against Pseudomonas aeruginosa, and 200 microg/ml and >400 microg/ml against Candida albicans, respectively. In addition, 1 and 3 exhibited phytotoxic activity against lettuce.
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99
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Murayama T, Tepper OM, Asahara T. Reciprocal role of vasculogenic factors and progenitor cells in atherogenesis. Handb Exp Pharmacol 2005:777-83. [PMID: 16596823 DOI: 10.1007/3-540-27661-0_29] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
While neovascularization plays an integral role in atherosclerosis, stimulation of angiogenesis does not appear to promote atherogenesis. This observation is important in view of recent advancements in angiogenic gene and cell therapy aimed at promoting new blood vessel growth in humans with vascular disease. Endothelial progenitor cells (EPCs) may actually prevent rather than provoke intimal thickening and vascular remodeling by promoting re-endothelialization in response to vascular trauma, as occurs with percutaneous transluminal vascular intervention for treating atherosclerotic vessels. Further support for the hypothesis that EPCs continuously repair vascular injury and contribute to the rejuvenation of vessels has been derived from animal studies demonstrating that serial injection of bone marrow-derived EPCs prevent atherogenesis, but that the quantity and quality of these cells deteriorate with aging. This chapter provides a summary of the influence of angiogenesis on atheromatous disease. Furthermore, the increasingly important relationship between atherosclerosis and newly emerging techniques in therapeutic angiogenesis (i.e., gene therapy and cell therapy with EPCs) is discussed.
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100
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Takenokuchi M, Yasuda C, Takeuchi K, Nakamachi Y, Mukai M, Kondo S, Kumagai S, Saigo K, Murayama T, Koizumi T, Tatsumi E. Quantitative nested reverse transcriptase PCR vs. real-time PCR for measuring AML1/ETO (MTG8) transcripts. ACTA ACUST UNITED AC 2004; 26:107-14. [PMID: 15053804 DOI: 10.1111/j.1365-2257.2004.00587.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A quantitative nested reverse transcriptase polymerase chain reaction (QN-RT-PCR) method was developed using a plasmid cDNA containing the AML1/ETO (MTG8) fusion transcript from Kasumi-1 cells, an acute-myelogenous leukemia cell line with the t(8;21) translocation. In this method, the plasmid was detectable at a concentration of 10(-17) m. The fusion transcript in a mixture of 10(7) Rice94 (Burkitt lymphoma cell line) cells containing two Kasumi-1 cells was detectable at 10(-17) m. In a previously published real-time PCR method, the plasmid containing the fusion transcript was detectable at 10(-16) m or higher, and 20 or more Kasumi-1 cells were detectable in 10(7) Rice94 cells. Thus, this QN-RT-PCR method is more sensitive than the real-time PCR. When the same samples were examined by real-time PCR and our QN-RT-PCR method, in one patient in clinical remission after chemotherapy and allogeneic-bone marrow transplantation (BMT), the transcript was detected by QN-RT-PCR 60 days prior to hematological relapse, in contrast to 10 days before hematological relapse by real-time PCR. The transcript level was below 10(-17) m (undetectable) with this QN-RT-PCR in patients in clinical remission after chemotherapy and BMT, while it was 10(-15)-10(-16) m in patients in clinical remission after chemotherapy alone. The quantitative difference of the transcript level in minimal residual disease (MRD) between these two different types of clinical remission was estimated to be at least 10(2)-fold. This QN-RT-PCR method is useful for predicting hematological relapse and for quantitatively estimating MRD in different types of clinical remission.
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MESH Headings
- Cell Line, Tumor
- Chromosomes, Human, Pair 21/genetics
- Chromosomes, Human, Pair 8/genetics
- Core Binding Factor Alpha 2 Subunit
- DNA, Complementary/genetics
- Humans
- Leukemia, Myeloid, Acute/diagnosis
- Leukemia, Myeloid, Acute/genetics
- Leukemia, Myeloid, Acute/metabolism
- Leukemia, Myeloid, Acute/pathology
- Neoplasm, Residual/diagnosis
- Neoplasm, Residual/genetics
- Neoplasm, Residual/pathology
- Oncogene Proteins, Fusion/genetics
- RNA, Messenger/genetics
- RUNX1 Translocation Partner 1 Protein
- Recurrence
- Reverse Transcriptase Polymerase Chain Reaction/methods
- Sensitivity and Specificity
- Transcription Factors/genetics
- Translocation, Genetic/genetics
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