title: The angiotensin II receptor antagonist valsartan enhances lipoprotein lipase mass in preheparin serum in type 2 diabetes with hypertension.
abstract: Recent studies suggest that blockade of angiotensin type 1 (AT1) receptor may have some effect on glucose and lipoprotein metabolism. Serum level of preheparin lipoprotein lipase (LPL) reflects LPL production mainly in adipocytes and is believed to be related to insulin sensitivity. We studied the effect of a selective AT1 antagonist, valsartan, on glucose, lipid metabolism and the preheparin LPL mass in 55 patients with type 2 diabetes and hypertension. Patients were randomized into a group administered valsartan 80 mg/day for 12 weeks or a group not administered valsartan (control). Blood pressure decreased significantly. HbA1c and TG levels decreased and HDL-C level increased, but these changes tended to be significantly different. TC and LDL-C levels were not significant changes. Preheparin LPL mass increased after valsartan administration compared with control (P = 0.0307), and migration ratio of LDL (LDL-Rm), which correlated negatively with LDL particle size, decreased compared with control (P < 0.0001). DeltaLDL-Rm correlated inversely with Delta preheparin LPL mass (r = -0.459). Among subjects treated with valsartan, greater improvement in preheparin LPL mass and blood pressure was observed in the subgroup with preheparin LPL mass <40 ng/ml. The results of this study suggest that valsartan may enhance LPL production in adipocytes, resulting in enlarged LDL particle size.
authors.affiliation: Center of Diabetes, Endocrine and Metabolism, Sakura Hospital, School of Medicine Toho University, 564-1 Shimoshizu, Sakura-City, Chiba 285-8741, Japan.
authors.forename: Atsuhito
authors.initials: A
authors.lastname: Saiki
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ohira
authors.forename: Kei
authors.initials: K
authors.lastname: Endo
authors.forename: Nobukiyo
authors.initials: N
authors.lastname: Koide
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Oyama
authors.forename: Takeyoshi
authors.initials: T
authors.lastname: Murano
authors.forename: Yoh
authors.initials: Y
authors.lastname: Miyashita
authors.forename: Kohji
authors.initials: K
authors.lastname: Shirai
mesh_terms: D000368:Aged; D047228:Angiotensin II Type 1 Receptor Blockers / Q000494:pharmacology* / Q000627:therapeutic use; D000959:Antihypertensive Agents / Q000494:pharmacology*; D003924:Diabetes Mellitus, Type 2 / Q000097:blood* / Q000150:complications* / Q000201:enzymology; D005260:Female; D006801:Humans; D006949:Hyperlipidemias / Q000188:drug therapy; D006973:Hypertension / Q000097:blood / Q000150:complications* / Q000188:drug therapy* / Q000201:enzymology; D008071:Lipoprotein Lipase / Q000097:blood* / Q000378:metabolism; D008074:Lipoproteins / Q000097:blood; D008297:Male; D008875:Middle Aged; D013777:Tetrazoles / Q000494:pharmacology* / Q000627:therapeutic use; D014633:Valine / Q000031:analogs & derivatives* / Q000494:pharmacology / Q000627:therapeutic use; D000068756:Valsartan
chemical_list: D047228:Angiotensin II Type 1 Receptor Blockers; D000959:Antihypertensive Agents; D008074:Lipoproteins; D013777:Tetrazoles; D000068756:Valsartan; D008071:Lipoprotein Lipase; D014633:Valine