Change of profilin-1 during the aging of rats' aorta and the anti-aging effect of grape procyanidins
10.3760/cma.j.issn.0254-9026.2014.08.027
- VernacularTitle:Profilin-1在大鼠主动脉老化过程中的变化及葡萄多酚抗老化作用研究
- Author:
Jun ZHANG
;
Haiqing GAO
;
Jian WANG
;
Yan WANG
;
Shaohua ZHAO
;
Jie QIU
- Publication Type:Journal Article
- Keywords:
Aging;
Oxidative stress;
Profilin-1
- From:Chinese Journal of Geriatrics
2014;33(8):907-910
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the change of profilin-1 during the aging of rats' aorta and the anti-aging effect of grape procyanidins (GPC).Methods Young male Wistar rats (9 weeks) and middle rats (12 months) were randomly divided into GPC treatment and control groups respectively.We quantified arterial aging changes through morphological methods.Thoracic aortas were stained with hematoxylin eosin.Serum levels of 3-nitrotyrosine (3-NT),malondialdehyde (MDA),superoxide dismutase (SOD) and nitric oxide (NO) were tested using enzyme-linked immunosorbent assay (ELISA).Western blotting was performed to measure the protein expression of inducible nitric oxide synthase (iNOS) and profilin-1.Results Compared with the young male Wistar rats group,aging change in the aortic morphology of middle rat group were shown by hematoxylin-eosin staining (HE) staining:media thickness (MT) increased [(98.3±0.5)μm vs.(83.1±1.0)μm,P＜0.05],luminal internal diameter (LD) decreased [(15.5 ±0.2) μm vs.(18.2±0.5,P＜0.05)μm,P＜ 0.05],(MT/LD)％ increased [(6.4±0.1) ％ vs.(4.6±0.1)％,P＜0.05],the protein expressions of profilin-1 and iNOS both increased [profilin-1:(1.58 ± 0.09) vs.(1.29 ± 0.04),iNOS:(1.02±0.12) vs.(0.75±0.02),both P＜0.05],levels of NO and SOD in serum decreased [NO:(6.3±0.2)μmol/L vs.(8.4±0.2) μmol/L,SOD:(172.3±1.6) U/ml vs.(189.1±1.5) U/ml,both P＜0.05],the levels of MDA and 3-NT increased[MDA:(11.3±0.3) μmol/L vs.(9.4 ±0.1) μmol/L,3 NT:(40.2±0.3) nmol/L vs.(35.6±0.5) nmol/L,both P＜0.05)].After treatment with GPC,compared with the control group,MT decreased,LD increased and MT/LD (％)decreased in the middle GPC treatment group.The protein expressions of profilin-1 had no changes before and after treatment with GPC both in young and middle groups.After the GPC treatment in middle group,compared with the middle control group,iNOS expression decreased,serum levels of NO and SOD increased,and the levels of MDA and 3-NT decreased significantly (all P ＜0.05).Conclusions Profilin-1 is related with age-related changes in rat aorta.Profilin-1 participates in vascular aging through iNOS induced oxidative stress.GPC may defer vascular aging by inhibiting vascular oxidative stress.
