title: Beneficial effects of ethanol extracts of Red Liriope platyphylla on vascular dysfunction in the aorta of spontaneously hypertensive rats.
abstract: Some biological effects of Red Liriope platyphylla (RLP) on various chronic diseases including Alzheimer's disease, diabetes and obesity were suggested after a report of the production from Liriope platyphylla (L. platyphylla, LP) roots using a steaming process. To examine the beneficial effects of ethanol extracts RLP (EEtRLP) on the vascular dysfunction of hypertension, alterations in key factors related to vascular regulation and antioxidant conditions were investigated in spontaneously hypertensive rats (SHR) after EEtRLP treatment for 2 weeks. High levels of 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity were detected in 500 or 1,000 mg/mL EEtRLP. Although no significant improvement of systolic blood pressure or aortic wall thickness were observed in the EEtRLP treated group, the expression level of angiotensin converting enzyme (ACE) and ACE2 increased significantly after EEtRLP treatment. Moreover, the concentration of aldosterone and K ion in serum rapidly recovered in the EEtRLP treated group relative to the vehicle treated group. Furthermore, the endothelial nitric oxide synthase (eNOS) expression and superoxide dismutase (SOD) activity were significantly increased in the EEtRLP treated group relative to the vehicle treated group, while the level of malondialdehyde (MDA) and NOx in the serum of the same group were recovered to the level of Wistar Kyoto (WKY) rats. Overall, the results presented herein provide novel evidence that EEtRLP treatment may improve vascular dysfunction in the aorta of the SHR through up regulation of the antioxidant state and down regulation of aldosterone and K ion concentration. These results also suggest that EEtRLP may be a potential candidate for treatment of various chronic diseases showing vascular dysfunction.
authors: Department of Biomaterials Science, College of Natural Resources & Life Science/Life and Industry Convergence Institute, Pusan National University, Miryang, Korea.
authors: Young-Ju
authors: YJ
authors: Lee
authors: Department of Biomaterials Science, College of Natural Resources & Life Science/Life and Industry Convergence Institute, Pusan National University, Miryang, Korea.
authors: Eun-Kyoung
authors: EK
authors: Koh
authors: Department of Biomaterials Science, College of Natural Resources & Life Science/Life and Industry Convergence Institute, Pusan National University, Miryang, Korea.
authors: Ji-Eun
authors: JE
authors: Kim
authors: Department of Biomaterials Science, College of Natural Resources & Life Science/Life and Industry Convergence Institute, Pusan National University, Miryang, Korea.
authors: Jun
authors: J
authors: Go
authors: Department of Biomaterials Science, College of Natural Resources & Life Science/Life and Industry Convergence Institute, Pusan National University, Miryang, Korea.
authors: Sung-Hwa
authors: SH
authors: Song
authors: Department of Biomaterials Science, College of Natural Resources & Life Science/Life and Industry Convergence Institute, Pusan National University, Miryang, Korea.
authors: Ji-Eun
authors: JE
authors: Seong
authors: Department of Life Science and Environmental Biochemistry, College of Natural Resources & Life Science, Pusan National University, Miryang, Korea.
authors: Hong-Joo
authors: HJ
authors: Son
authors: Department of Experimental Animal Research, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea.
authors: Byeong-Cheol
authors: BC
authors: Kang
authors: Department of Biomaterials Science, College of Natural Resources & Life Science/Life and Industry Convergence Institute, Pusan National University, Miryang, Korea.
authors: Dae-Youn
authors: DY
authors: Hwang
keywords: ACE; DPPH; Red Liriope platyphylla; SOD; aldosterone; eNOS