Matsuzawa Y

References (5)

Title : Polymorphisms in NRXN3, TFAP2B, MSRA, LYPLAL1, FTO and MC4R and their effect on visceral fat area in the Japanese population - Hotta_2010_J.Hum.Genet_55_738
Author(s) : Hotta K , Nakamura M , Nakamura T , Matsuo T , Nakata Y , Kamohara S , Miyatake N , Kotani K , Komatsu R , Itoh N , Mineo I , Wada J , Yoneda M , Nakajima A , Funahashi T , Miyazaki S , Tokunaga K , Kawamoto M , Masuzaki H , Ueno T , Hamaguchi K , Tanaka K , Yamada K , Hanafusa T , Oikawa S , Yoshimatsu H , Nakao K , Sakata T , Matsuzawa Y , Nakamura Y , Kamatani N
Ref : J Hum Genet , 55 :738 , 2010
Abstract : The predominant risk factor of metabolic syndrome is intra-abdominal fat accumulation, which is determined by waist circumference and waist-hip ratio measurements and visceral fat area (VFA) that is measured by computed tomography (CT). There is evidence that waist circumference and waist-hip ratio in the Caucasian population are associated with variations in several genes, including neurexin 3 (NRXN3), transcription factor AP-2beta (TFAP2B), methionine sulfoxide reductase A (MSRA), lysophospholipase-like-1 (LYPLAL1), fat mass and obesity associated (FTO) and melanocortin 4 receptor (MC4R) genes. To investigate the relationship between VFA and subcutaneous fat area (SFA) and these genes in the recruited Japanese population, we genotyped 8 single-nucleotide polymorphisms (SNPs) in these 6 genes from 1228 subjects. Multiple regression analysis revealed that gender, age, and rs1558902 and rs1421085 genotypes (additive model) in FTO were significantly associated with body mass index (BMI; P=0.0039 and 0.0039, respectively), SFA (P=0.0027 and 0.0023, respectively) and VFA (P=0.045 and 0.040, respectively). However, SNPs in other genes, namely, NRXN3, TFAP2B, MSRA, LYPLAL1 and MC4R were not significantly associated with BMI, SFA or VFA. Our data suggest that some SNPs, which were identified in genome-wide studies in the Caucasians, also confer susceptibility to fat distribution in the Japanese subjects.
ESTHER : Hotta_2010_J.Hum.Genet_55_738
PubMedSearch : Hotta_2010_J.Hum.Genet_55_738
PubMedID: 20703240

Title : Polymorphisms in four genes related to triglyceride and HDL-cholesterol levels in the general Japanese population in 2000 - Arai_2005_J.Atheroscler.Thromb_12_240
Author(s) : Arai H , Yamamoto A , Matsuzawa Y , Saito Y , Yamada N , Oikawa S , Mabuchi H , Teramoto T , Sasaki J , Nakaya N , Itakura H , Ishikawa Y , Ouchi Y , Horibe H , Egashira T , Hattori H , Shirahashi N , Kita T
Ref : J Atheroscler Thromb , 12 :240 , 2005
Abstract : We studied the association of six common polymorphisms of four genes related to lipid metabolism with serum lipid levels. We selected single-nucleotide polymorphisms (SNPs) in the genes for cholesteryl ester transfer protein (CETP), lipoprotein lipase (LPL), hepatic lipase (LIPC), and apolipoprotein CIII (APOC3), and studied 2267 individuals randomly selected from the participants of Serum Lipid Survey 2000. There was a significant association of CETP polymorphism (D442G, Int14 +1 G --> A, and TaqIB), LPL polymorphism (S447X), and LIPC polymorphism (-514 --> CT) with HDL-cholesterol levels. We also found a significant association of LPL polymorphism (S447X) and APOC3 polymorphism (SstI) with triglyceride levels. This is the largest database showing the association of common genetic variants in lipid metabolism with serum lipid levels in the general Japanese population. Further study is necessary to elucidate the role of these gene polymorphisms in cardiovascular events.
ESTHER : Arai_2005_J.Atheroscler.Thromb_12_240
PubMedSearch : Arai_2005_J.Atheroscler.Thromb_12_240
PubMedID: 16205020

Title : Mutations in Japanese subjects with primary hyperlipidemia--results from the Research Committee of the Ministry of Health and Welfare of Japan since 1996 - Maruyama_2004_J.Atheroscler.Thromb_11_131
Author(s) : Maruyama T , Yamashita S , Matsuzawa Y , Bujo H , Takahashi K , Saito Y , Ishibashi S , Ohashi K , Shionoiri F , Gotoda T , Yamada N , Kita T
Ref : J Atheroscler Thromb , 11 :131 , 2004
Abstract : Primary hyperlipidemia is caused by various molecular defects in lipid metabolism. The Research Committee on Primary Hyperlipidemia organized by the Ministry of Health and Welfare of Japan (present: the Ministry of Health, Labour and Welfare) has investigated reported mutations in Japanese patients with primary hyperlipidemia and related disorders (including hypolipidemia), and has created a database based on the questionnaire sent to the members of council board of the Japan Atherosclerosis Society. Mutations in the following genes were investigated: low density lipoprotein receptor, lecithin: cholesteryl acyltransferase, lipoprotein lipase (LPL), hepatic lipase, apolipoproteins A-I, A-II, A-IV, B, C-II, C-III and E, microsomal triglyceride transfer protein, and cholesterol ester transfer protein (CETP). Until 1998, 922 patients with primary hyperlipidemia and related disorders has been registered with the Research Committee, and 190 mutations in 15 genes had been reported, showing a marked variation in Japanese patients with primary hyperlipidemia and related disorders. So-called "common mutations" have been described in Japanese patients with familial hypercholesterolemia, LPL deficiency and CETP deficiency. The genetic defect of familial combined hyperlipidemia (FCHL) is still unknown although FCHL is speculated to be the most prevalent genetic hyperlipidemia, and further investigations should be performed to elucidate the molecular mechanisms of FCHL
ESTHER : Maruyama_2004_J.Atheroscler.Thromb_11_131
PubMedSearch : Maruyama_2004_J.Atheroscler.Thromb_11_131
PubMedID: 15256764

Title : Novel LPL mutation (L303F) found in a patient associated with coronary artery disease and severe systemic atherosclerosis - Saika_2003_Eur.J.Clin.Invest_33_216
Author(s) : Saika Y , Sakai N , Takahashi M , Maruyama T , Kihara S , Ouchi N , Ishigami M , Hiraoka H , Nakamura T , Yamashita S , Matsuzawa Y
Ref : European Journal of Clinical Investigation , 33 :216 , 2003
Abstract : BACKGROUND: Patients with lipoprotein lipase (LPL) deficiency had been generally thought to be spared accelerated atherosclerosis in spite of a marked elevation of plasma triglyceride levels. However, it has been recently reported that some heterozygous and homozygous LPL-deficient patients are associated with premature atherosclerosis. In this paper, we report a 55-year-old type I hyperlipidaemic patient with a novel missense mutation in the LPL gene. PATIENT AND
RESULTS: The patient had suffered from coronary artery disease, abdominal aortic aneurysm, and stenoses of the bilateral renal arteries and superficial femoral arteries. Sequencing of the genomic DNA revealed that the patient was a homozygote for the mutation, a G to C transition at nucleotide position 1069 in the exon 6, resulting in an amino acid substitution of Phe for Leu303 (L303F). Approximately 6% and approximately 40% of normal LPL activity and LPL mass, respectively, were detected in the patient's postheparin plasma. An in vitro expression study demonstrated that COS7 cells transfected with L303F mutant cDNA produced a 40% amount of LPL protein in cell lysates compared with normal cDNA, but no protein was detected in the media. Lipoprotein lipase activity was completely absent in both lysates and media of the cells transfected with the mutant cDNA, suggesting that this mutation in the LPL gene results in the production of a functionally inactive protein. CONCLUSION: This case suggests that the LPL missense mutation (L303F), which impairs lipolysis but preserves the LPL mass, is proatherogenic.
ESTHER : Saika_2003_Eur.J.Clin.Invest_33_216
PubMedSearch : Saika_2003_Eur.J.Clin.Invest_33_216
PubMedID: 12641539
Gene_locus related to this paper: human-LPL

Title : Altered lipid composition and differential changes in activities of membrane-bound enzymes of erythrocytes in hepatic cirrhosis - Kakimoto_1995_Metab.Clin.Exp_44_825
Author(s) : Kakimoto H , Imai Y , Kawata S , Inada M , Ito T , Matsuzawa Y
Ref : Metabolism: Clinical & Experimental , 44 :825 , 1995
Abstract : Lipid composition, fluidity, and Na+,K(+)-adenosine triphosphatase (ATPase), Mg(2+)-ATPase, and acetylcholinesterase (AChE) activities of erythrocyte membranes were examined in comparison to plasma lipid composition and lecithin:cholesterol acyltransferase (LCAT) activities in 39 patients with hepatic cirrhosis due to viral hepatitis (Child-Pugh class A, n = 12; class B, n = 13; and class C, n = 14). Plasma LCAT activities decreased and the plasma free-cholesterol to phospholipid molar ratio (C/PL) increased with progressive severity of hepatic cirrhosis. C/PL and fluorescence polarization (inverse of fluidity) of erythrocyte membranes also increased with disease progression (C/PL: Child-Pugh A, 0.911 +/- 0.010; B, 0.941 +/- 0.011; C, 0.979 +/- 0.028; and normal, 0.798 +/- 0.010; fluorescence polarization: Child-Pugh A, 0.348 +/- 0.002; B, 0.351 +/- 0.002; C, 0.355 +/- 0.002; and normal, 0.340 +/- 0.002). There was a correlation between C/PL and fluorescence polarization of erythrocyte membranes (r = .629, P < .001). Na+,K(+)-ATPase activity of erythrocyte membranes did not differ between cirrhotic patients and normal subjects. On the other hand, Mg(2+)-ATPase activity decreased in Child-Pugh C cirrhosis. AChE activity was decreased in Child-Pugh A cirrhosis, and decreased further in Child-Pugh B and C cirrhosis. AChE and Mg(2+)-ATPase activities correlated inversely with fluorescence polarization (r = -.652, P < .001 and r = -.381, P < .01, respectively).
ESTHER : Kakimoto_1995_Metab.Clin.Exp_44_825
PubMedSearch : Kakimoto_1995_Metab.Clin.Exp_44_825
PubMedID: 7616839