title: Resistance artery creatine kinase mRNA and blood pressure in humans.
abstract: Hypertension remains the main risk factor for cardiovascular death. Environmental and biological factors are known to contribute to the condition, and circulating creatine kinase was reported to be the main predictor of blood pressure in the general population. This was proposed to be because of high resistance artery creatine kinase-BB rapidly regenerating ATP for vascular contractility. Therefore, we assessed whether creatine kinase isoenzyme mRNA levels in human resistance arteries are associated with blood pressure. We isolated resistance-sized arteries from omental fat donated by consecutive women undergoing uterine fibroid surgery. Blood pressure was measured in the sitting position. Vessels of 13 women were included, 6 normotensive and 7 hypertensive, mean age 42.9 years (SE, 1.6) and mean systolic/diastolic blood pressure, 144.8 (8.0)/86.5 (4.3) mm Hg. Arteriolar creatine kinase isoenzyme mRNA was assessed using quantitative real-time polymerase chain reaction. Normalized creatine kinase B mRNA copy numbers, ranging from 5.2 to 24.4 (mean, 15.0; SE, 1.9), showed a near-perfect correlation with diastolic blood pressure (correlation coefficient, 0.9; 95% confidence interval, 0.6-1.0) and were well correlated with systolic blood pressure, with a 90% relative increase in resistance artery creatine kinase B mRNA in hypertensives compared with normotensives, normalized copy numbers were, respectively, 19.3 (SE, 2.0) versus 10.1 (SE, 2.1), P=0.0045. To our knowledge, this is the first direct evidence suggesting that resistance artery creatine kinase mRNA expression levels concur with blood pressure levels, almost doubling with hypertension. These findings add to the evidence that creatine kinase might be involved in the vasculature's pressor responses.
authors.affiliation: Department of Vascular Medicine, Academic Medical Center, University of Amsterdam, Room F4-253, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands. F.A.Karamat@amc.uva.nl.
authors.forename: Fares A
authors.initials: FA
authors.lastname: Karamat
authors.forename: Inge
authors.initials: I
authors.lastname: Oudman
authors.forename: Carrie
authors.initials: C
authors.lastname: Ris-Stalpers
authors.forename: Gijs B
authors.initials: GB
authors.lastname: Afink
authors.forename: Remco
authors.initials: R
authors.lastname: Keijser
authors.forename: Joseph F
authors.initials: JF
authors.lastname: Clark
authors.forename: Gert A
authors.initials: GA
authors.lastname: van Montfrans
authors.forename: Lizzy M
authors.initials: LM
authors.lastname: Brewster
mesh_terms: D000328:Adult; D001158:Arteries / Q000737:chemistry / Q000378:metabolism / Q000503:physiopathology*; D001794:Blood Pressure / Q000502:physiology*; D003402:Creatine Kinase / Q000032:analysis / Q000096:biosynthesis*; D005260:Female; D015870:Gene Expression; D006801:Humans; D006973:Hypertension / Q000378:metabolism / Q000503:physiopathology*; D008875:Middle Aged; D012333:RNA, Messenger; D014655:Vascular Resistance / Q000502:physiology*
chemical_list: D012333:RNA, Messenger; D003402:Creatine Kinase
keywords: creatine kinase; genetics, human; hypertension; microcirculation