TY  - JOUR
TI  - Roles of angiotensin II, Olmesartan and PD123319 on
proliferation, oxidative stress and TGF-β1 in HUVEC culture
AB  - Aims: Angiotensin II (Ang II) causes endothelial cell damage. Oxidative stress is involved in the
pathophysiology of cardiovascular diseases via transforming growth factor-beta 1 (TGF-β1).
In most studies increases in Ang II and TGF-β1 levels in several cell types are bidirectional. The
present study investigated the effects of Ang II on oxidative stress, cell proliferation, and TGF-β1
levels in human umbilical vein endothelial cells (HUVECs).
Methods: HUVECs were treated with Ang II (0.1 µM), Ang II type 1 receptor (ATR1) antagonist
Olmesartan (1 µM), and Ang II type 2 receptors (ATR2) antagonist PD123319 (1 µM) for
24 hours. Cell proliferation and viability were evaluated by the tetrazolium salt (MTT)
assay. Total antioxidant capacity (TAC) and total oxidant capacity (TOC) were measured by
spectrophotometer intracellularly and in the culture medium. The TGF-β1 level was measured
by enzyme-linked immunosorbent assay (ELISA).
Results: The addition of 1 µM, 0.1 µM, and 0.01 µM Ang II increased proliferation in HUVECs. Cell
proliferation increased significantly in both Ang II and Ang II+Olmesartan+PD123319 groups.
However, Ang II+Olmesartan tended to decrease cell proliferation. In the control group TAC
and TOC levels remained in the normal range in HUVEC extracts. In other all groups, TOC values
increased compared to control. In HUVECs medium, TAC level was higher in the control, Ang II
and Ang II+Olmesartan groups, but normal and tolerable in other groups whereas, TOC levels
were elevated in control and other all groups. In HUVECs extracts, compared with the control,
TGF-β1 level was significantly lower in the Ang II group, but increased in the Ang II+Olmesartan
group. There was no significant difference in TGF-β1 levels between medium groups.
Conclusions: Ang II shows its proliferative effects through ATR1 activation, whereas stimulation
of ATR2 seems to have a key role in the pathophysiology of oxidative stress.
AU  - akillioglu, kübra
AU  - cicek, zehra
AU  - İLHAN, Ayşe Şebnem
DO  - 10.4274/gulhane.galenos.2021.1461
PY  - 2022
JO  - Gülhane Tıp Dergisi
VL  - 64
IS  - 2
SN  - 1302-0471
SP  - 136
EP  - 143
DB  - TRDizin
UR  - http://search/yayin/detay/534735
ER  -