title: Effects of serum homocysteine and adiponectin levels on platelet aggregation in untreated patients with essential hypertension.
abstract: The aim of the present study is to determine and correlate adiponectin, homocysteine, nitric oxide, and ADP-induced platelet aggregation levels in untreated patients with essential hypertension and healthy individuals. A total of 36 individuals, 23 untreated patients with essential hypertension and 13 healthy individuals, were included in the scope of this study. Enzyme-linked immunosorbent assay (ELISA) was used to determine the serum adiponectin and TNF-alpha levels. The levels of serum homocysteine were measured by using competitive chemiluminescent enzyme immunoassay. Serum concentrations of hsCRP were measured by the Nephelometer. Plasma nitrite, nitrate, and total nitric oxide (NOx) levels were determined by colorimetric method. Homocysteine and hsCRP levels in patients with essential hypertension were found to be significantly higher than those in the control group (P = 0.02, P = 0.001, respectively). The average platelet aggregation levels in patient group were higher than control group, but there were no statistically significant differences between them (P > 0.05). In addition, in patients with essential hypertension adiponectin and nitrite levels are significantly lower than control group (P < 0.001, P = 0.045, respectively). We have also found significant correlations between nitrite-platelet aggregation amplitude, nitrite-platelet aggregation slope, nitrite-adiponectin, homocysteine-platelet aggregation amplitude, and sistolic blood pressure-platelet aggregation amplitude levels (r = -0.844; P < 0.001, r = -0.680; P = 0.011, r = 0.454; P = 0.05, r = 0.414; P = 0.05, r = 0.442; P = 0.035, respectively). Increased homocysteine and decreased adiponectin serum levels in patients with essential hypertension correlate well with changes in ADP-induced conventional platelet aggregation. This association may potentially contribute to future thrombus formation and higher risks for cardiovascular events in hypertensive patients.
authors.affiliation: Istanbul Medical Faculty, Bone Marrow Transplantation Unit, Department of Pediatric Haematology and Oncology, Istanbul University, Istanbul, Turkey. hakekmekci@yahoo.com
authors.forename: Hakan
authors.initials: H
authors.lastname: Ekmekçi
authors.forename: Ozlem Balci
authors.initials: OB
authors.lastname: Ekmekçi
authors.forename: Serap
authors.initials: S
authors.lastname: Erdine
authors.forename: Hüseyin
authors.initials: H
authors.lastname: Sönmez
authors.forename: Yusup
authors.initials: Y
authors.lastname: Ataev
authors.forename: Zeynep
authors.initials: Z
authors.lastname: Oztürk
authors.forename: Ilknur Işler
authors.initials: II
authors.lastname: Bütün
authors.forename: Ciğdem
authors.initials: C
authors.lastname: Gürel
authors.forename: Mine
authors.initials: M
authors.lastname: Kucur
authors.forename: Nurver
authors.initials: N
authors.lastname: Turfaner
authors.forename: Turgut
authors.initials: T
authors.lastname: Ulutin
authors.forename: Sevim
authors.initials: S
authors.lastname: Purisa
authors.forename: Vural Ali
authors.initials: VA
authors.lastname: Vural
mesh_terms: D052242:Adiponectin / Q000097:blood*; D000328:Adult; D015415:Biomarkers / Q000097:blood; D005260:Female; D006710:Homocysteine / Q000097:blood*; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000175:diagnosis; D008297:Male; D008875:Middle Aged; D010974:Platelet Aggregation / Q000502:physiology*
chemical_list: D052242:Adiponectin; D015415:Biomarkers; D006710:Homocysteine