title: Effect of Nicotinic acid/Laropiprant in the lipoprotein(a) concentration with regard to baseline lipoprotein(a) concentration and LPA genotype.
abstract: BACKGROUND
  Lipoprotein(a) [Lp(a)] is a lipoprotein in which apolipoproteinB-100 is linked to apolipoprotein(a) [apo(a)]. Significant variation in Lp(a) concentration is specific to LPA gene, which codes for apo(a). Nicotinic acid (NA) is used for treatment of dyslipidemias, and the lowering effect of NA on Lp(a) has been previously reported.
  
  
  OBJECTIVE
  To evaluate the Lp(a) lowering effect of 1g/20mg and 2g/40mgday of Nicotinic acid/Laropiprant in subjects with different baseline Lp(a) concentrations and depending on the LPA genotype.
  
  
  METHODS
  In an open-label, 10-week study, 1g/20mgday of NA/Laropiprant for 4weeks followed by 6weeks of 2g/40mgday conducted at 3 centers in Spain, 82 subjects were enrolled. Patients were studied at baseline and at the end of both treatment periods and were enrolled in three groups: normal Lp(a) (<50mg/dL), high Lp(a) (50-120mg/dL) and very high Lp(a) (>120mg/dL). The LPA genetic polymorphism was analyzed by a real-time PCR.
  
  
  RESULTS
  There was a significant difference in LPA genotypes among Lp(a) concentration groups and an inverse and significant correlation between baseline Lp(a) concentration and LPA genotype was found (R=-0.372, p<0.001). There were a significant decrease in total cholesterol, triglycerides, LDL cholesterol, apo B and Lp(a), and a significant increase in HDL cholesterol after NA/Laropiprant treatment, without changes in BMI. However, there were no statistical differences in percentage variation of analyzed variables depending on LPA genotype.
  
  
  CONCLUSIONS
  LPA genotype is a major determinant of Lp(a) baseline concentration. However, the lipid lowering effect of NA is not related to LPA genotype.
authors: Lipid Unit and Laboratorio de Investigación Molecular, Hospital Universitario Miguel Servet, IIS Aragón, Universidad de Zaragoza, Zaragoza, Spain.
authors: Ana
authors: A
authors: Cenarro
authors: Lipid Unit, Hospital San Jorge, Huesca, Spain.
authors: José
authors: J
authors: Puzo
authors: Lipid Unit, Hospital Royo Villanova, Zaragoza, Spain.
authors: Juan
authors: J
authors: Ferrando
authors: Lipid Unit and Laboratorio de Investigación Molecular, Hospital Universitario Miguel Servet, IIS Aragón, Universidad de Zaragoza, Zaragoza, Spain.
authors: Rocío
authors: R
authors: Mateo-Gallego
authors: Lipid Unit and Laboratorio de Investigación Molecular, Hospital Universitario Miguel Servet, IIS Aragón, Universidad de Zaragoza, Zaragoza, Spain.
authors: Ana M
authors: AM
authors: Bea
authors: Biochemistry Department, Hospital Universitario Miguel Servet, Zaragoza, Spain.
authors: Pilar
authors: P
authors: Calmarza
authors: Lipid Unit and Laboratorio de Investigación Molecular, Hospital Universitario Miguel Servet, IIS Aragón, Universidad de Zaragoza, Zaragoza, Spain.
authors: Estíbaliz
authors: E
authors: Jarauta
authors: Lipid Unit and Laboratorio de Investigación Molecular, Hospital Universitario Miguel Servet, IIS Aragón, Universidad de Zaragoza, Zaragoza, Spain. Electronic address: civeira@unizar.es.
authors: Fernando
authors: F
authors: Civeira
mesh_terms: D001055:Apolipoproteins B / Q000235:genetics / Q000378:metabolism; D002784:Cholesterol / Q000235:genetics / Q000378:metabolism; D008076:Cholesterol, HDL / Q000235:genetics / Q000378:metabolism; D008078:Cholesterol, LDL / Q000235:genetics / Q000378:metabolism; D050171:Dyslipidemias / Q000235:genetics / Q000378:metabolism; D005260:Female; D005838:Genotype; D006801:Humans; D007211:Indoles / Q000494:pharmacology*; D017270:Lipoprotein(a) / Q000235:genetics* / Q000378:metabolism*; D008246:Lysophospholipids / Q000235:genetics / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D009525:Niacin / Q000494:pharmacology*; D011110:Polymorphism, Genetic / Q000187:drug effects / Q000235:genetics; D014280:Triglycerides / Q000235:genetics / Q000378:metabolism
chemical_list: D001055:Apolipoproteins B; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D007211:Indoles; D017270:Lipoprotein(a); D008246:Lysophospholipids; C518174:MK-0524; D014280:Triglycerides; D009525:Niacin; D002784:Cholesterol; C032881:lysophosphatidic acid
keywords: Clinical trial; Genotype; LPA; Lipoprotein(a); Nicotinic acid