The Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice

Objective: The iridoid glycosides were extracted and separated from Osmanthus fragrans seeds, and the potential protective effect of Osmanthus fragrans seed extract on concanavalin A-induced immune liver injury in mice was studied.Methods:Osmanthus fragrans seeds were extracted by 95% ethanol reflux...

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Autores principales: Yuchen Zhang, Feng Xiao, Qiqi Zhou, Tingting Diao, Meng Zhang, Dongyang Liu, Zhuowen Wang, Ting Huang, Yupei Wu, Yuting Bai, Qing Min
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Publicado: Frontiers Media S.A. 2021
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spelling oai:doaj.org-article:af980fd1a3094adc9dbbd7296a7e80f52021-11-08T07:49:52ZThe Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice1663-981210.3389/fphar.2021.760338https://doaj.org/article/af980fd1a3094adc9dbbd7296a7e80f52021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphar.2021.760338/fullhttps://doaj.org/toc/1663-9812Objective: The iridoid glycosides were extracted and separated from Osmanthus fragrans seeds, and the potential protective effect of Osmanthus fragrans seed extract on concanavalin A-induced immune liver injury in mice was studied.Methods:Osmanthus fragrans seeds were extracted by 95% ethanol reflux. Then, the iridoid glycosides were enriched by extraction refined through petroleum ether (60°C–90°C), ethyl acetate, and water-saturated n-butanol in sequence, so as to purify the n-butanol part (Osmanthus fragrans seed’s n-butanol extraction, OFSN) by macroporous resin. Specnuezhenide and Nuezhenoside G13 were used as the reference substances to determine the concentration of iridoid glycosides by HPLC. On this basis, a mouse immune liver injury model was established by tail intravenous concanavalin A (20 mg/kg); the contents of serum ALT, AST, IFN-γ, and TNF-α and the contents of liver tissue MDA and SOD were determined; the pathological changes of the liver by HE staining were observed; and the expression levels of p38MAPK and p-p38mapk in liver tissue were detected by WB.Results: The linearity, precision, repeatability, recovery, and stability of HPLC all met the requirements by validating with the methodology. The contents of Specnuezhenide and Nuezhenoside G13 in the n-butanol extracts were 39.20% and 39.88%, respectively. Actually, their contents can reach up to 82.56% and 87.9% after being purified by macroporous resin. The results of animal experiments show that OFSN could significantly reduce the liver and spleen index, reduce the ALT and AST contents in plasma and the MDA content in liver tissue, and then increase the SOD content. Besides, OFSN could also reduce the plasma IFN-γ and TNF-α levels. The HE staining result indicates that the pathological changes in the liver tissues of mice treated with OFSN are alleviated to different degrees while the WB result suggests that OFSN could significantly inhibit the expression of p-p38mapk.Conclusion:Osmanthus fragrans seeds are rich in iridoid glycosides, which has a good protective effect on mouse immune liver injury caused by concanavalin A. The mechanism may be related to inhibiting the phosphorylation of p38MAPK, inhibiting the release of inflammatory mediators, improving the antioxidant capacity of liver cells, and weakening the occurrence of lipid peroxidation.Yuchen ZhangFeng XiaoQiqi ZhouTingting DiaoMeng ZhangDongyang LiuZhuowen WangTing HuangYupei WuYuting BaiQing MinFrontiers Media S.A.articleOsmanthus fragransiridoid glycosidescontent determinationHPLCliver injuryTherapeutics. PharmacologyRM1-950ENFrontiers in Pharmacology, Vol 12 (2021)
institution DOAJ
collection DOAJ
language EN
topic Osmanthus fragrans
iridoid glycosides
content determination
HPLC
liver injury
Therapeutics. Pharmacology
RM1-950
spellingShingle Osmanthus fragrans
iridoid glycosides
content determination
HPLC
liver injury
Therapeutics. Pharmacology
RM1-950
Yuchen Zhang
Feng Xiao
Qiqi Zhou
Tingting Diao
Meng Zhang
Dongyang Liu
Zhuowen Wang
Ting Huang
Yupei Wu
Yuting Bai
Qing Min
The Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice
description Objective: The iridoid glycosides were extracted and separated from Osmanthus fragrans seeds, and the potential protective effect of Osmanthus fragrans seed extract on concanavalin A-induced immune liver injury in mice was studied.Methods:Osmanthus fragrans seeds were extracted by 95% ethanol reflux. Then, the iridoid glycosides were enriched by extraction refined through petroleum ether (60°C–90°C), ethyl acetate, and water-saturated n-butanol in sequence, so as to purify the n-butanol part (Osmanthus fragrans seed’s n-butanol extraction, OFSN) by macroporous resin. Specnuezhenide and Nuezhenoside G13 were used as the reference substances to determine the concentration of iridoid glycosides by HPLC. On this basis, a mouse immune liver injury model was established by tail intravenous concanavalin A (20 mg/kg); the contents of serum ALT, AST, IFN-γ, and TNF-α and the contents of liver tissue MDA and SOD were determined; the pathological changes of the liver by HE staining were observed; and the expression levels of p38MAPK and p-p38mapk in liver tissue were detected by WB.Results: The linearity, precision, repeatability, recovery, and stability of HPLC all met the requirements by validating with the methodology. The contents of Specnuezhenide and Nuezhenoside G13 in the n-butanol extracts were 39.20% and 39.88%, respectively. Actually, their contents can reach up to 82.56% and 87.9% after being purified by macroporous resin. The results of animal experiments show that OFSN could significantly reduce the liver and spleen index, reduce the ALT and AST contents in plasma and the MDA content in liver tissue, and then increase the SOD content. Besides, OFSN could also reduce the plasma IFN-γ and TNF-α levels. The HE staining result indicates that the pathological changes in the liver tissues of mice treated with OFSN are alleviated to different degrees while the WB result suggests that OFSN could significantly inhibit the expression of p-p38mapk.Conclusion:Osmanthus fragrans seeds are rich in iridoid glycosides, which has a good protective effect on mouse immune liver injury caused by concanavalin A. The mechanism may be related to inhibiting the phosphorylation of p38MAPK, inhibiting the release of inflammatory mediators, improving the antioxidant capacity of liver cells, and weakening the occurrence of lipid peroxidation.
format article
author Yuchen Zhang
Feng Xiao
Qiqi Zhou
Tingting Diao
Meng Zhang
Dongyang Liu
Zhuowen Wang
Ting Huang
Yupei Wu
Yuting Bai
Qing Min
author_facet Yuchen Zhang
Feng Xiao
Qiqi Zhou
Tingting Diao
Meng Zhang
Dongyang Liu
Zhuowen Wang
Ting Huang
Yupei Wu
Yuting Bai
Qing Min
author_sort Yuchen Zhang
title The Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice
title_short The Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice
title_full The Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice
title_fullStr The Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice
title_full_unstemmed The Potential Protective Effect of Iridoid Glycosides Isolated From Osmanthus fragrans Seeds Against the Development of Immune Liver Injury in Mice
title_sort potential protective effect of iridoid glycosides isolated from osmanthus fragrans seeds against the development of immune liver injury in mice
publisher Frontiers Media S.A.
publishDate 2021
url https://doaj.org/article/af980fd1a3094adc9dbbd7296a7e80f5
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