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      저자 : Tianfa Li (검색결과 2 건)
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        Edaravone alleviates lung damage in mice with hypoxic pulmonary hypertension by increasing nitric oxide synthase 3 expression

        Wan Zheng,Tianfa Li,Junping Wei,Yani Yan,Shanshan Yang 대한약리학회 2023 The Korean Journal of Physiology & Pharmacology Vol.27 No.3

        This study is to determine the regulation of nitric oxide synthase 3 (NOS3) by edaravone in mice with hypoxic pulmonary hypertension (HPH). C57BL/6J mice were reared in a hypoxic chamber. HPH mice were treated with edaravone or edaravone + L-NMMA (a NOS inhibitor). Lung tissue was collected for histological assessment, apoptosis analysis, and detection of malondialdehyde, superoxide dismutase, tumor necrosis factor (TNF)-α, interleukin (IL)-6, and NOS3. The levels of serum TNF-α and IL-6 were also measured. Immunohistochemistry was used to visualize the expression of α-smooth muscle actin (SMA) in pulmonary arterioles. Edaravone treatment improved hemodynamics, inhibited right ventricular hypertrophy, increased NOS3 expression, and reduced pathological changes, pulmonary artery wall thickness, apoptotic pulmonary cells, oxidative stress, and the expression of TNF-α, IL-6, and α-SMA in HPH mice. L-NMMA treatment counteracted the lung protective effects of edaravone. In conclusion, edaravone might reduce lung damage in HPH mice by increasing the expression of NOS3.

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        Wogonin attenuates vascular remodeling by inhibiting smooth muscle cell proliferation and migration in hypertensive rat

        Yang Yang,Huang Shan,Wang Jun,Nie Xiao,Huang Ling,Li Tianfa 대한약리학회 2024 The Korean Journal of Physiology & Pharmacology Vol.28 No.1

        Wogonin, extracted from the roots of Scutellaria baicalensis Georgi, has been shown to suppress collagen deposition in spontaneously hypertensive rats (SHRs). This study was performed to investigate the role and mechanism of wogonin underlying vascular remodeling in SHRs. After injection of SHRs with 40 mg/kg of wogonin, blood pressure in rats was measured once a week. Masson's trichrome staining was conducted to observe the changes in aortas and mesenteric arteries. Vascular smooth muscle cells (VSMCs) isolated from rat thoracic aortas were treated with Angiotensin II (Ang II; 100 nM) in the presence or absence of varying concentrations of wogonin. The viability and proliferation of VSMCs were examined using Cell Counting Kit-8 assay and 5-ethynyl-2’-deoxyuridine assay, respectively. The migration of VSMCs was examined using wound healing assay and transwell assay. We found that wogonin administration alleviated hypertension, increased lumen diameter, and reduced the thickness of the arterial media in SHRs. Ang II treatment enhanced the viability of VSMCs, which was inhibited by wogonin in a concentration -dependent manner. Wogonin reversed Ang II-induced increases in the viability, proliferation, and migration of VSMCs. Moreover, wogonin inhibited Ang II-induced activation of mitogen-activated protein kinase (MAPK) signaling in VSMCs. Overall, wogonin repressed the proliferative and migratory capacity of VSMCs by regulating the MAPK signaling pathway, thereby attenuating vascular remodeling in hypertensive rats, indicating that wogonin might be a therapeutic agent for the treatment of vascular diseases.

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