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Zeng S, Chen D, Liu G, Wu YX, Gao ZQ, Su Y, Yuan JN, Liu L, Shan JC, Pang QF, Zhu T. Salvinorin A protects against methicillin resistant staphylococcus aureus-induced acute lung injury via Nrf2 pathway. Int Immunopharmacol 2020; 90:107221. [PMID: 33293260 DOI: 10.1016/j.intimp.2020.107221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/13/2020] [Accepted: 11/16/2020] [Indexed: 02/05/2023]
Abstract
Salvinorin A (SA), a neoclerodane diterpene, is isolated from the dried leaves ofSalvia divinorum. SA has traditionally been used treatments for chronic pain diseases. Recent research has demonstrated that SA possesses the anti-inflammatory property. The present study aim to explore the effects and potentialmechanisms ofSA in protection against Methicillin Resistant Staphylococcus aureus (MRSA)-induced acute lung injury (ALI). Here, we firstly found that verylowdosesof SA (50 μg/kg) could markedly decrease the infiltration of pulmonary neutrophils, mRNA expression of pro-inflammatory cytokines (TNF-α, IL-1β and IL-6) and then attenuated ALI cause by MRSA infection in mice. In vitro findings revealed that SA attenuated lipoteichoicacid-induced apoptosis, inflammation and oxidative stress in RAW264.7 cells. Mechanism research revealed that SA increased both mRNA levels and protein levels of nuclear factor erythroid 2-related factor 2 (Nrf2) and up-regulated mRNA expression of its downstream genes (HO-1, Gclm, Trx-1, SOD1 and SOD2). Additionally, Nrf2 knockout mice abolished the inhibitory effect of SA on neutrophil accumulation and oxidative stress in MRSA-induced ALI. In conclusion, SA attenuates MRSA-induced ALI via Nrf2 signaling pathways.
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Affiliation(s)
- Si Zeng
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China; Department of Anesthesiology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610000, China
| | - Dan Chen
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Gang Liu
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Ya-Xian Wu
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Zhi-Qi Gao
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Ying Su
- Library, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Jia-Ning Yuan
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Liu Liu
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China; Department of Anesthesiology, Sichuan Academy of Medical Science and Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610000, China
| | - Jia-Chen Shan
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Qing-Feng Pang
- Wuxi School of Medicine, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Tao Zhu
- Department of Anesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China.
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Affiliation(s)
- JC Shan
- Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan
| | - MH Hsieh
- Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan, Department of Psychiatry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - CC Liu
- Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan
| | - CC Wen
- Department of Psychiatry, College of Medicine, National Taiwan University, Taipei, Taiwan
| | - CM Liu
- Department of Psychiatry, National Taiwan University Hospital, Taipei, Taiwan, Department of Psychiatry, College of Medicine, National Taiwan University, Taipei, Taiwan
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Shan JC. [Determination of hepatocyte adrenergic alpha 1 receptor and study on actions of nourishing yin and replenishing qi drugs in experimental hyperthyroid rats]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1994; 14:96-70. [PMID: 8044019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In this study, hyperthyroid rat models (group 1) were established by daily intramuscular injections of thyroxine for 7 days. Group 2 were hyperthyroid rats receiving at the same time Nourishing Yin and Replenishing Qi drugs (Ophiopogonis japonis, Pseudostellariae heterophylla and Rehmannia glutinosa). Normal rats served as controls. Group 1 and group 2 rats showed manifestations of hyperthyroidism, higher rectal temperature, increased O2 consumption, as well as significantly higher serum TT3 and TT4 levels. Receptor proteins of liver cell membrane were prepared. Receptor binding assay was performed using 3H-prazosin (adrenergic alpha 1 receptor antagonist) as radioligand, maximal binding capacity (Bmax) and dissociation constant (Kd) were calculated from Scatchard curve. It was found Bmax (fmol/mg protein) in model groups were lower than that of the control group, but the differences were not statistically significant. Kd (nM) in group 1 was significantly lower than that of control group (2.32 +/- 1.09 vs 5.42 +/- 2.54, P < 0.05), indicating that receptor affinity was increased in hyperthyroid rats. Kd in group 2 (3.11 +/- 1.48) was intermediate between that in group 1 and controls, suggesting that these Chinese herbal medicine might have an effect in lowering receptor affinity and the peripheral conversion of T4 to T3.
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Affiliation(s)
- J C Shan
- First Affiliated Hospital, Sun Yat-sen University of Med. Sci, Guangzhou
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