Abstract Title:

Tangeretin from Citrus reticulate Inhibits Respiratory Syncytial Virus Replication and Associated Inflammation in Vivo.

Abstract Source:

J Agric Food Chem. 2015 Nov 4 ;63(43):9520-7. Epub 2015 Oct 26. PMID: 26468759

Abstract Author(s):

Jiao-Jiao Xu, Zhong Liu, Wei Tang, Guo-Cai Wang, Hau Yin Chung, Qiu-Ying Liu, Ling Zhuang, Man-Mei Li, Yao-Lan Li

Article Affiliation:

Jiao-Jiao Xu


Human respiratory syncytial virus (RSV) is a common pathogen that causes pneumonia and bronchiolitis in infants and young children. Our previous study showed that tangeretin from Citrus reticulate possessed potent in vitro anti-RSV effects comparable to that of ribavirin. Therefore, in this study, we investigated the in vivo anti-RSV activity of tangeretin in 3-week-old male BALB/c mice. A plaque reduction assay and fluorescence quantitative polymerase chain reaction (FQ-PCR) showed that tangeretin inhibited RSV replication in the lung of mice. Moreover, a luminex assay indicated tangeretin relieved RSV-induced lung inflammation by attenuating interleukin (IL)-1β secretion. Possible anti-inflammatory mechanisms of tangeretin were preliminarily explored using a RSV-infected macrophage model. A FQ-PCR, enzyme-linked immunosorbent assay (ELISA), and luciferase assay revealed that tangeretin inhibited RSV-induced inflammation by suppressing nuclear factor-κB(NF-κB) activation. This study demonstrates that tangeretin inhibited RSV replication and RSV-induced lung inflammation in vivo and may be useful in preventing and treating RSV infections and inflammation.

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