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2017 ; 12
(9
): e0184233
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Cerebrovascular gene expression in spontaneously hypertensive rats
#MMPMID28880918
Grell AS
; Frederiksen SD
; Edvinsson L
; Ansar S
PLoS One
2017[]; 12
(9
): e0184233
PMID28880918
show ga
Hypertension is a hemodynamic disorder and one of the most important and
well-established risk factors for vascular diseases such as stroke. Blood vessels
exposed to chronic shear stress develop structural changes and remodeling of the
vascular wall through many complex mechanisms. However, the molecular mechanisms
involved are not fully understood. Hypertension-susceptible genes may provide a
novel insight into potential molecular mechanisms of hypertension and secondary
complications associated with hypertension. The aim of this exploratory study was
to identify gene expression differences in the middle cerebral arteries between
12-week-old male spontaneously hypertensive rats and their normotensive
Wistar-Kyoto rats using an Affymetrix whole-transcriptome expression profiling.
Quantitative PCR and western blotting were used to verify genes of interest. 169
genes were differentially expressed in the middle cerebral arteries from
hypertensive compared to normotensive rats. The gene expression of 72 genes was
decreased and the gene expression of 97 genes was increased. The following genes
with a fold difference ?1.40 were verified by quantitative PCR; Postn, Olr1, Fas,
Vldlr, Mmp2, Timp1, Serpine1, Mmp11, Cd34, Ptgs1 and Ptgs2. The gene expression
of Postn, Olr1, Fas, Vldlr, Mmp2, Timp1 and Serpine1 and the protein expression
of LOX1 (also known as OLR1) were significantly increased in the middle cerebral
arteries from spontaneously hypertensive rats compared to Wistar-Kyoto rats. In
conclusion, the identified genes in the middle cerebral arteries from
spontaneously hypertensive rats could be possible mediators of the vascular
changes and secondary complications associated with hypertension. This study
supports the selection of key genes to investigate in the future research of
hypertension-induced end-organ damage.