title: High-density lipoprotein subclasses distribution and composition in Mexican adolescents with low HDL cholesterol and/or high triglyceride concentrations, and its association with insulin and C-reactive protein.
abstract: We tested whether low high-density lipoprotein cholesterol (HDL-C) and/or high triglycerides are associated to abnormal HDL subclasses distribution and composition, and their relationships with fasting insulin and C-reactive protein (CRP). Four groups of adolescents were studied: group 1 (HDL-C< or =35 mg/dl+TG> or =150 mg/dl; n=16); group 2 (isolated HDL-C< or =35 mg/dl; n=31); group 3 (isolated TG> or =150 mg/dl; n=20); and group 4 (CT<200 mg/dl, HDL-C>35 mg/dl, LDL-C<130 mg/dl, and TG<150 mg/dl; n=39). Tanner score-adjusted proportions of large subspecies (HDL(2b), HDL(2a)) were lower, and small (HDL(3b), HDL(3c)) were higher in groups 1, 2 and 3 than in group 4. As a result, HDL particle size in the three dyslipidemic groups was smaller than in group 4 (p<0.001). HDL CE, FC, PL, and apo AI percent contents were lower, whereas HDL TG percent content was higher in groups 1, 2 and 3 compared to group 4. CRP median values were also significantly higher in the three groups with dyslipidemia than in normolipidemic subjects (group 4). Fasting Insulin concentration and HOMA-IR were significantly higher in group 1 than in the other three groups. In stepwise multivariate analysis HDL subclass distribution and composition were independently associated only with HDL-C and waist circumference. As reported in adults, adolescents with low HDL-C and/or high TG have abnormalities in HDL subclasses distribution and lipid composition, which may render their HDL dysfunctional. In addition, these subjects have high CRP and insulin levels suggesting the presence of chronic low-grade inflammation.
authors.affiliation: Department of Endocrinology, National Institute of Cardiology-Ignacio Chávez, Mexico.
authors.forename: Aida
authors.initials: A
authors.lastname: Medina-Urrutia
authors.forename: Juan G
authors.initials: JG
authors.lastname: Juarez-Rojas
authors.forename: Rocio
authors.initials: R
authors.lastname: Martínez-Alvarado
authors.forename: Esteban
authors.initials: E
authors.lastname: Jorge-Galarza
authors.forename: Rosalinda
authors.initials: R
authors.lastname: Posadas-Sánchez
authors.forename: Guillermo
authors.initials: G
authors.lastname: Cardoso-Saldaña
authors.forename: Nacu
authors.initials: N
authors.lastname: Caracas-Portilla
authors.forename: Enrique
authors.initials: E
authors.lastname: Mendoza-Perez
authors.forename: Carlos
authors.initials: C
authors.lastname: Posadas-Romero
mesh_terms: D000293:Adolescent; D002097:C-Reactive Protein / Q000378:metabolism*; D008076:Cholesterol, HDL / Q000378:metabolism*; D005260:Female; D006801:Humans; D007249:Inflammation; D007328:Insulin / Q000378:metabolism*; D008075:Lipoproteins, HDL / Q000096:biosynthesis* / Q000235:genetics*; D008297:Male; D008800:Mexico; D015999:Multivariate Analysis; D012307:Risk Factors; D014280:Triglycerides / Q000378:metabolism*; D055105:Waist Circumference
chemical_list: D008076:Cholesterol, HDL; D007328:Insulin; D008075:Lipoproteins, HDL; D014280:Triglycerides; D002097:C-Reactive Protein