title: Naringin attenuates enhanced cough, airway hyperresponsiveness and airway inflammation in a guinea pig model of chronic bronchitis induced by cigarette smoke.
abstract: Naringin is a flavanone with various bioactivities including expectorant effect, antitussive effect and inhibitory effects on asthma and acute lung injury. In present study we examined the effects of naringin on enhanced cough, airway hyperresponsiveness (AHR) and airway inflammation in chronic cigarette smoke (CS) exposure-induced chronic bronchitis in guinea pigs. To achieve this, guinea pigs were exposed to CS for 8weeks (10cigarettes/day, 6days/week). Oral administration of naringin (9.2, 18.4 and 36.8mg/kg) significantly attenuated the enhanced cough and AHR in smoke-exposed guinea pigs, reduced the concentrations of interleukin-8 (IL-8), leukotriene B4 (LTB4) and tumor necrosis factor-α (TNF-α) in bronchoalveolar lavage fluid (BALF) and decreased the myeloperoxidase (MPO) activity in both BALF and lung tissue, but did not significantly decrease the leukocytes in BALF. Naringin also improved superoxidase dismutase (SOD) activity in lung tissue and increased the content of lipoxin A4 (LXA4) in BALF in this guinea pig model of chronic bronchitis. These results suggested that naringin exhibited antitussive, anti-AHR and anti-inflammation effects on chronic CS exposure-induced chronic bronchitis in guinea pigs, and may possess novel therapeutic potential in the treatment of chronic bronchitis.
authors.affiliation: Key Laboratory of Gene Engineering of the Ministry of Education, Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, PR China.
authors.forename: Yu-Long
authors.initials: YL
authors.lastname: Luo
authors.forename: Chen-Chen
authors.initials: CC
authors.lastname: Zhang
authors.forename: Pei-Bo
authors.initials: PB
authors.lastname: Li
authors.forename: Yi-Chu
authors.initials: YC
authors.lastname: Nie
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.forename: Jian-Gang
authors.initials: JG
authors.lastname: Shen
authors.forename: Wei-Wei
authors.initials: WW
authors.lastname: Su
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology; D000996:Antitussive Agents / Q000494:pharmacology; D016535:Bronchial Hyperreactivity / Q000188:drug therapy / Q000209:etiology / Q000503:physiopathology; D029481:Bronchitis, Chronic / Q000188:drug therapy* / Q000209:etiology / Q000503:physiopathology; D001992:Bronchoalveolar Lavage Fluid / Q000276:immunology; D018925:Chemokines / Q000378:metabolism; D003371:Cough / Q000188:drug therapy / Q000209:etiology / Q000503:physiopathology; D016207:Cytokines / Q000378:metabolism; D004195:Disease Models, Animal; D005260:Female; D044950:Flavanones / Q000494:pharmacology*; D006168:Guinea Pigs; D006801:Humans; D008297:Male; D009195:Peroxidase / Q000378:metabolism; D012906:Smoke / Q000009:adverse effects; D012907:Smoking / Q000009:adverse effects; D013482:Superoxide Dismutase / Q000378:metabolism; D014026:Nicotiana
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000996:Antitussive Agents; D018925:Chemokines; D016207:Cytokines; D044950:Flavanones; D012906:Smoke; D009195:Peroxidase; D013482:Superoxide Dismutase; C005273:naringenin