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Takahashi M, Doi M, Okada M, Munakata T, Wagatsuma Y. P2-480 International comparison on the validity and the reliability of the "international aids questionnaire". Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976m.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Semenov AN, Subbotin AV, Hadziioannou G, Ten Brinke G, Manias E, Doi M. Nonlinear dynamics of melted polymer layers. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/masy.19971210116] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Narita M, Qiu D, Hamaguchi M, Doi M, Futamura M, Sakamoto N, Ohya Y. Maternal Diet during Pregnancy and Wheeze and Eczema in Infants; the Japanese Birth Cohort (T-CHILD) Study. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Himeno S, Doi M, Fujishiro H. Interaction of cadmium and manganese in cellular uptake and toxicity. Toxicol Lett 2010. [DOI: 10.1016/j.toxlet.2010.03.965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Doi M, Takeda T, Sakurai Y, Kato J, Hayashi T, Fukuda K, Takase T, Shima M. Altered immunoglobulin A and M levels associated with changes in BAFF and APRIL after administration of intravenous immunoglobulin to treat Kawasaki disease. J Investig Allergol Clin Immunol 2010; 20:413-418. [PMID: 20945608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023] Open
Abstract
BACKGROUND Kawasaki disease (KD) is an acute vasculitis of unknown etiology. Immunoregulatory abnormalities have been thought to contribute to its pathogenesis. Although treatment with intravenous immunoglobulin (IVIG) effectively prevents significant cardiac morbidity, the mechanism by which IVIG produces an effect in KD has yet to be fully elucidated. OBJECTIVE To investigate the effects of IVIG on the immune system of patients with KD. PATIENTS AND METHODS Eleven patients with KD (mean [SD] age, 2.2 [1.5] years) were enrolled in this prospective study and treated with high-dose IVIG therapy (2 g/kg in 1 or 2 infusions) during the acute phase of the disease. We examined immunological changes, with special reference to Ig levels and 2 previously unassessed cytokines: B cell-activating factor belonging to the tumor necrosis factor family (BAFF), and a proliferation-inducing ligand (APRIL). RESULTS Clinical symptoms disappeared quickly in all cases, with no coronary artery abnormalities. IgA and IgM levels responded more rapidly than previously reported and reached a peak between the 3rd and 10th day after the start of IVIG treatment. The mean (SD) BAFF level was high before IVIG treatment (3234 [1904] pg/mL) and decreased significantly (1085 [257] pg/mL) after IVIG treatment, whereas the mean (SD) APRIL level before IVIG treatment (18.0 [10.0] ng/mL) rose significantly (120.6 [41.2] ng/mL). A significant inverse correlation between BAFF and APRIL was observed in patients with KD. CONCLUSIONS These results suggest that IVIG may affect the pathogenesis of KD through alteration of BAFF/APRIL.
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Miyoshi T, Doi M, Hirohata S, Kuaschi S. Abstract: P376 CARDIO-ANKLE VASCULAR INDEX IS INDEPENDENTLY ASSOCIATED WITH CORONARY ATHEROSCLEROSIS AND LEFT VENTRICULAR FUNCTION IN PATIENTS WITH ISCHEMIC HEART DISEASE. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70671-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Kinno M, Ishizawa K, Shimada S, Masaoka H, Doi M, Seyama S, Komori T, Hirose T. Cytology is a useful tool for the diagnosis of rosette-forming glioneuronal tumour of the fourth ventricle: a report of two cases. Cytopathology 2009; 21:194-7. [DOI: 10.1111/j.1365-2303.2008.00619.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Vives i Batlle J, Balonov M, Beaugelin-Seiller K, Beresford NA, Brown J, Cheng JJ, Copplestone D, Doi M, Filistovic V, Golikov V, Horyna J, Hosseini A, Howard BJ, Jones SR, Kamboj S, Kryshev A, Nedveckaite T, Olyslaegers G, Pröhl G, Sazykina T, Ulanovsky A, Vives Lynch S, Yankovich T, Yu C. Inter-comparison of absorbed dose rates for non-human biota. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2007; 46:349-73. [PMID: 17665210 DOI: 10.1007/s00411-007-0124-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Accepted: 07/05/2007] [Indexed: 05/16/2023]
Abstract
A number of approaches have been proposed to estimate the exposure of non-human biota to ionizing radiation. This paper reports an inter-comparison of the unweighted absorbed dose rates for the whole organism (compared as dose conversion coefficients, or DCCs) for both internal and external exposure, estimated by 11 of these approaches for selected organisms from the Reference Animals and Plants geometries as proposed by the International Commission on Radiological Protection. Inter-comparison results indicate that DCCs for internal exposure compare well between the different approaches, whereas variation is greater for external exposure DCCs. Where variation among internal DCCs is greatest, it is generally due to different daughter products being included in the DCC of the parent. In the case of external exposures, particularly to low-energy beta-emitters, variations are most likely to be due to different media densities being assumed. On a radionuclide-by-radionuclide basis, the different approaches tend to compare least favourably for (3)H, (14)C and the alpha-emitters. This is consistent with models with different source/target geometry assumptions showing maximum variability in output for the types of radiation having the lowest range across matter. The intercomparison demonstrated that all participating approaches to biota dose calculation are reasonably comparable, despite a range of different assumptions being made.
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Yamaguchi T, Doi M. Debonding dynamics of pressure-sensitive adhesives: 3D block model. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2006; 21:331-9. [PMID: 17297565 DOI: 10.1140/epje/i2006-10073-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2006] [Accepted: 01/04/2007] [Indexed: 05/13/2023]
Abstract
We develop a 3-dimensional mechanical model which describes cavity expansions in a viscoelastic solid medium during the debonding phase of the probe-tack test. The stress-strain curves are in good agreement with experiments for the typical pressure-sensitive adhesives. We also show that the separation speed dependence can be explained by viscous dissipations due to large strain rates around the cavities.
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Tajiri K, Sugaya M, Nagaya T, Orihara H, Ishibashi Y, Doi M, Inoue A. The Physical Properties of a Side-Chain Type Polysiloxane Liquid-Crystalline Polymer with Electrorheological Effect. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259708041996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gendeh BS, Doi M, Selladurai BM, Khalid BAK, Jegan T, Misiran K. The role of endoscopic endonasal approach to pituitary tumours: HUKM experience. THE MEDICAL JOURNAL OF MALAYSIA 2006; 61:343-8. [PMID: 17240587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Surgery for pituitary tumours at our institution was performed by rhinosurgical route by combined procedure by otolaryngologist and neurosurgeons. A retrospective review of case records of patients who had endonasal endoscopic transphenoidal approach for pituitary tumours from September 1998 to December 2004 was performed. A total of 81 trans-sphenoidal surgeries were performed during this study period. Only 68 case records with adequate information were available for review, 56 patients were included in the study and 12 were excluded. There were 24 males (42%) and 32 females (58%). The ethnic distribution, were 29 Malays, 24 Chinese, 2 Indian and 1 others. The age ranged from 16 years to 76 years, with a mean of 46 years. The majority of our patients presented with visual symptoms (38), headache (28), menstrual cycle disturbance or impotence (14) and acromegalic features (16). Forty patients had macroadenoma (71%) and 16 had microadenomas (29%). Thirty-six patients out of 40 macro-adenomas had suprasellar extensions (90%). Only eleven patients had lumbar drain inserted prior to commencement of the surgery and the majority of these were macroadenomas. The common complications encountered were diabetes insipidus (4), cerebrospinal fluid leak (2), meningitis (3), epistaxis (2), septal perforation (2), intercavernous sinus haemorrhage (3) and anterior pituitary insufficiency (2). Our study reveals that endonasal trans-sphenoidal approach is a safe and effective method of management of pituitary adenomas.
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Yamaguchi T, Morita H, Doi M. Modeling on debonding dynamics of pressure-sensitive adhesives. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2006; 20:7-17. [PMID: 16733634 DOI: 10.1140/epje/i2005-10078-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2005] [Accepted: 03/08/2006] [Indexed: 05/09/2023]
Abstract
We propose a simple mechanical model describing viscoelasticity and cavitation during the debonding process in pressure-sensitive adhesives (PSA). Our calculation qualitatively reproduces typical stress-strain curves in the probe-tack test, such as the steep stress maxima and the following plateau region. It is shown that in the thin-film geometry the stress-strain curve is essentially determined by the cavities created by the large negative pressure. Effects of pre-existent air bubbles due to surface roughness are also discussed.
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Asano A, Yamada T, Katsuya Y, Taniguchi T, Sasaki M, Doi M. Conformational restraints induced by modification of configuration of threonine and oxazoline residues in ascidiacyclamide analogues. ACTA ACUST UNITED AC 2006. [DOI: 10.1111/j.1747-0285.2006.00345.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Doi M, Asano A, Yoshida H, Inouguchi M, Iwanaga K, Sasaki M, Katsuya Y, Taniguchi T, Yamamoto D. Structure and property of self-assemble valinyl bolaform amides having different chirality. ACTA ACUST UNITED AC 2005; 66:181-9. [PMID: 16138856 DOI: 10.1111/j.1399-3011.2005.00286.x] [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: 11/29/2022]
Abstract
Bolaform amides were designed from N,N'-bis(carboethoxy-L-valinyl)-diaminoethane (1) by linking t-butyloxycarbonyl-valine through ethylenediamine (EDA) to enable spectroscopic and X-ray diffraction analyses. N,N'-Bis(Boc-L-valinyl)-diaminoethane (2) and N,N'-bis(Boc-D-valinyl)-diaminoethane (3) were composed of L-Val and D-Val, respectively. N-(Boc-L-valinyl)-N'-(Boc-D-valinyl)-diaminoethane (4) was composed of both L-Val and D-Val, and was achiral (meso-peptide). Peptide 5 was a 1:1 mixture of 2 and 3, and was also achiral (racemate). These peptides mediated gelation of corn oil at a concentration of approximately 1%. Within crystals, the peptides formed beta-sheet ribbons, but differences were observed in hydrogen-bonding patterns and side-chain arrangements. These differences were also deduced from temperature dependence of amide protons. Force-field calculations based on the crystal structures indicated that association of beta-sheet ribbons had energy benefits, and it was assumed that molecular aggregation progressed spontaneously. These structural studies indicated the chirality of amino acids affected for the properties of bolaform amides.
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Koizumi H, Mikami M, Doi M, Tadokoro M. Clonality analysis of nodular fasciitis by HUMARA-methylation-specific PCR. Histopathology 2005; 47:320-1. [PMID: 16115235 DOI: 10.1111/j.1365-2559.2005.02090.x] [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: 10/25/2022]
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Doi M, Ikeda K. Postanesthetic respiratory depression in humans: a comparison of sevoflurane, isoflurane and halothane. J Anesth 2005; 1:137-42. [PMID: 15235849 DOI: 10.1007/s0054070010137] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/1987] [Accepted: 05/29/1987] [Indexed: 11/25/2022]
Abstract
The postanesthetic respiratory depression with sevoflurane, isoflurane and halothane was studied in twenty-one patients. They were divided into three groups of seven patients each. One group underwent sevoflurane anesthesia, another group isoflurane and the third group halothane. Following extubation, the decrease in blood concentration of the anesthetic agent was most rapid with sevoflurane and slowest with halothane. Twenty minutes following extubation, resting ventilation and ventilatory response to carbon dioxide returned to the preanesthetic state with sevoflurane and isoflurane anesthesia. With halothane anesthesia, however, the depressive respiratory effects of halothane remained; depressed ventilatory response to carbon dioxide, decreased tidal volume and increased respiratory frequency. Although halothane has been reported to have the least depressive respiratory effect of the three, its elimination was slowest. Thus the respiratory effects of halothane persisted up to and past the twenty minute mark, far longer than with sevoflurane or isoflurane.
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Uozaki H, Fukayama M, Nakagawa K, Ishikawa T, Misawa S, Doi M, Maekawa K. The pathology of multi-organ involvement: two autopsy cases from the Tokai-mura criticality accident. Br J Radiol 2005. [DOI: 10.1259/bjr/70312032] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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Hirano S, Okamoto K, Doi M, Kamura O, Inagaki M, Aono Y. Microstructure of the interface in magnesium alloy to aluminium alloy dissimilar joints produced by friction stir welding. ACTA ACUST UNITED AC 2004. [DOI: 10.1533/wint.2004.3319] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Sakashita T, Doi M, Nakamura Y, Iida T. A case study of radon-222 transport from continental North-East Asia to the Japanese islands in winter by numerical analysis. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2004; 72:245-257. [PMID: 14972408 DOI: 10.1016/s0265-931x(03)00176-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2002] [Revised: 06/18/2003] [Accepted: 06/19/2003] [Indexed: 05/24/2023]
Abstract
A case study of the regional transport ( approximately 3000 km) of radon-222 ((222)Rn) from continental North-East Asia to the Japanese islands was performed by numerical analysis using five separate source areas (South, Middle and North China, Russia and Korea), while a seasonal northwest wind blew over the Japan Sea. The results for three periods (Term I: 16-18, Term II: 22-25 and Term III: 27-28 in December 1990) were compared with concentrations measured at the Kanazawa site (near the coast of the Japan Sea facing the seasonal wind) and the Nagoya site (overland and downwind on the shores of the Pacific Ocean). Most of the (222)Rn at the Kanazawa site was calculated to come from North China and Korea in Term I, Middle China, North China, and Korea in Term II, and Russia and Korea in Term III. The considerable differences in the origins of (222)Rn emanated from the continent were estimated between Terms I, II and III, even though the similar northwest wind was dominant over the Japan Sea. A contour line analysis indicated movement of (222)Rn emanated from Middle China in a northerly direction first and then a southeasterly direction, resulting from low pressure. The results suggest that the low-pressure systems play an important role in the transport of (222)Rn in North-East Asia.
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Nakagawa Y, Robert V, Kawarazaki J, Epping W, Smith MT, Poot GA, Mizuguchi I, Kanbe T, Doi M. Recurrent isolation of an uncommon yeast,Candidapararugosa, from a sarcoma patient. Med Mycol 2004; 42:267-71. [PMID: 15285058 DOI: 10.1080/13693780310001597674] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
A yeast was repeatedly isolated from the saliva of a sarcoma patient. A relatively uncommon species, Candida maris, was identified based on the API 20C profile. The yeast species most frequently obtained from the patient's mother and from clinic staff was Candida albicans. A comparison of the yeast obtained from the patient with the type strain of C. maris strongly suggested that the former was not representative of C. maris. Analysis of partial ribosomal DNA sequences of the patient strain and from the type strain of C. maris showed that the two are phylogenetically not closely related. The patient strain was very close to Candida pararugosa, a relatively uncommon asporogenous yeast. DNA reassociation studies among C. pararugosa and patient isolates showed that they were conspecific. We could not determine the source of the yeast infection. This case will alert hospital staff to be aware of the possibility of unexpected environmental microorganisms as causes of infections, colonizations and persistent environmental contamination events in immunocompromised patients.
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Inoue Y, Hagi A, Miki S, Yoshinaga N, Doi M, Doi K, Miyata K. 2P-0550 Possible mechanisms for the antiobesity effects of a novel compound OT-13540. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90689-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Hattori S, Doi M, Takahashi E, Kurosu T, Nara M, Nakamatsu S, Nishiki Y, Furuta T, Iida M. J APPL ELECTROCHEM 2003; 33:85-91. [DOI: 10.1023/a:1022945714152] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Sakashita T, Doi M, Yasuda H, Takeda H, Fuma S, Nakamura Y, Häder DP. High-energy carbon ion irradiation and the inhibition of negative gravitaxis in Euglena gracilis Z. Int J Radiat Biol 2002; 78:1055-60. [PMID: 12456293 DOI: 10.1080/09553000210166592] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE To study the effects of high-energy carbon ion irradiation on negative gravitaxis in the photosynthetic flagellate Euglena gracilis strain Z in a dose-response-dependent manner. MATERIALS AND METHODS Cells were exposed to 290 MeV amu(-1) carbon ion from the Heavy Ion Medical Accelerator in Chiba (HIMAC) at 12 doses (0, 1, 5, 7.5, 10, 15, 20, 50, 75, 100, 150, 200 Gy for water). r was used to quantify negative gravitaxis observed in a recently developed biomonitoring system. RESULTS Negative gravitaxis of Euglena was significantly affected by irradiation at a dose >7.5 Gy, 28 h after irradiation. Negative gravitaxis recovered after a few days. The rising phase of r during the first 30 s of orientation was independent of irradiation dose. The recovery mechanism itself was damaged by 290 MeV amu(-1) carbon ions at a dose >50 Gy. CONCLUSIONS The results indicate that negative gravitaxis in Euglena may be affected by the radiation experienced during a space experiment especially during the occurrence of solar flares. The analyses of time needed to reorient to the gravitational vector suggest that the steering control of the flagellar apparatus is affected by exposure to the 290 MeV amu(-1) carbon ion irradiation, resulting in an altered beating pattern of a flagellum and/or changes of the cell form during reorientation.
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Sakashita T, Doi M, Nakamura Y, Fuma S, Ishii N, Takeda H. Gamma-irradiation effect: variation of photosynthetic activity of Euglena. BIOMEDICAL AND ENVIRONMENTAL SCIENCES : BES 2002; 15:261-267. [PMID: 12500667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
OBJECTIVE To study the effects of gamma-ray irradiation on carbon fixation (Specific production rate: SPR), CO2 utilization efficiency (CUE) and electron transfer rate (ETR) in the photosynthetic flagellate Euglena gracilis strain Z in a dose-response dependent manner. METHODS Euglena cells were cultured in an inorganic nutrient medium containing ammonium chloride or proteose peptone. Cells were exposed to gamma-ray at 5 doses (0, 100, 250, 350, 500 Gy for water). Five days after irradiation, three photosynthetic activities were measured. SPR, which is a carbon uptake rate per unit carbon mass, was determined by 13C tracer methodology. CUE was evaluated using a relation of carbon isotope fractionation in Calvin cycle. ETR in photosystem II (PS II) was measured by a chlorophyll fluorescence analysis. RESULTS Even at a dose of 500 Gy, 80% of ETR of the non-irradiated control (0 Gy) was sustained, while SPR and CUE were about half the level in the non-irradiated control at 500 Gy. Furthermore, the dose response of ETR was considerably different from the others. CONCLUSION Our findings suggest that not only PS II but also the Calvin cycle in the photosynthetic system is affected by gamma ray irradiation.
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Ando R, Doi M, Yamauchi K, Chida Y, Ida T, Endo K, Yanagi H, Tomura S. Association of beta-fibrinogen and factor VII polymorphism with plasma fibrinogen and factor VII levels, and no association of PAI-1 polymorphism with plasma PAI-1 levels in hemodialysis patients. Clin Nephrol 2002; 58:25-32. [PMID: 12141403 DOI: 10.5414/cnp58025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
AIMS Recent studies have stressed the roles of genetic factors on the plasma levels of hemostatic markers and on cardiovascular complications. We investigated the association of DNA polymorphisms for beta-fibrinogen, factor VII, and PAI-1 with plasma levels of these factors and with ischemic heart disease (IHD) and cerebral infarction (CI) in patients undergoing hemodialysis (HD). METHODS beta-fibrinogen G/A-455, factor VII R353Q and PAI-1 4G/5G polymorphisms were determined by PCR-RFLP in 149 HD patients and in 100 controls. The plasma levels of fibrinogen, factor VII and PAI-1 were also measured. RESULTS The allele frequencies and the genotype frequencies of these 3 polymorphisms were not different between HD patients and controls. In HD patients, plasma fibrinogen levels were significantly lower in the GG genotype than in the GA genotype, and plasma factor VII activity was significantly higher in the RR genotype than in the RQ genotype. Multiple regression analysis disclosed that CRP and beta-fibrinogen polymorphism were the significant determinants of fibrinogen levels. Plasma PAI-1 levels were not different among the 3 genotypes. The frequency of the A-455 allele was significantly higher in HD patients with CI than in those without CI, and the genotype distribution for beta-fibrinogen differed significantly between the 2 groups. Between the same 2 groups, however, significant differences were found neither in the frequency of the 353Q or 4G allele nor in the genotype distribution for factor VII and PAI-1. No significant differences in the frequency of the G-455, 353Q or 4G alleles, or in the genotype distribution for beta-fibrinogen, factor VII and PAI-1 were observed between patients with IHD and those without IHD. Multiple logistic regression analysis demonstrated that neither polymorphism was associated with CI or IHD. CONCLUSIONS In HD patients, beta-fibrinogen and factor VII polymorphisms affected plasma levels of fibrinogen and factor VII, respectively. Beta-fibrinogen polymorphism was not an independent but a possible risk factor for CI in HD patients. Further study will be needed to confirm the precise role of 5-fibrinogen polymorphisms in the pathogenesis of CI in HD patients.
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