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The protective effect of C-phycocyanin on paraquat-induced acute lung injury in rats
Authors:Sun Yingxin  Zhang Juan  Yan Yongjian  Chi Mingfeng  Chen Wenwen  Sun Peng  Qin Song
Affiliation:aInstitute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;bDepartment of Postgraduate, Shandong University of Traditional Chinese Medicine, Jinan 250014, China;cShandong Academy of Occupational Health and Occupational Disease, Jinan 250062, China;dThe Athletes Rehabilitation Centre of ShanDong Province, Jinan 250014, China;eDepartment of Pharmaceutical Analysis, Luye Pharmaceutical Limited Company, Yantai 264003, China;fLaboratory of Biological Resources, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, 17 Chunhui Road, Laishan District, Yantai 264003, Shandong Province, China
Abstract:To investigate the potential protective effect of C-phycocyanin (PC) on paraquat (PQ)-induced acute lung injury, rats were divided into control, PQ-treated and PQ + PC-treated groups. Rats in PQ-treated group were orally administered with 50 mg/kg PQ, and rats in PQ + PC-treated group were intraperitoneally injected with 50 mg/kg PC after administration of PQ. At 8, 24, 48 and 72 h after treatments, GSH-Px and SOD activities, MDA levels in plasma and BALF, HYP, NF-κB, IκB-α and TNF-α contents in lung tissues were measured. The pathological changes in lung were observed. After treatment with PC, the levels of MDA and the relative contents of NF-κB and TNF-α were significantly decreased, the activities of GSH-Px and SOD and the relative contents of IκB-α were significantly increased. The degree of rat lung damage was obviously reduced in PQ + PC-treated group. The results suggested that PC treatment significantly attenuated PQ-induced acute lung injury.
Keywords:Abbreviations: PQ, paraquat   PC, C-phycocyanin   GSH-Px, glutathione peroxidase   HYP, hydroxyproline   MDA, maleic dialdehyde   SOD, superoxide dismutase
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