title: Oral administration of patchouli alcohol isolated from Pogostemonis Herba augments protection against influenza viral infection in mice.
abstract: Seasonal influenza A infection results in considerable morbidity and mortality. The limited efficacy of available therapeutic strategies stresses the need for development and study of new molecules against influenza virus (IFV). Patchouli alcohol (PA), the major chemical constituent of Pogostemonis Herba, was previously found to strongly inhibit influenza H1N1 replication in vitro. In the present study, the in vivo anti-IFV effect of PA was investigated. In a mouse model infected with lethal levels of FM1, oral administration of PA (20 mg/kg to 80 mg/kg) for 7 d post IFV infection significantly increased the survival rate and survival time. For IFV infection at nonlethal levels, the quantity of IFV in the lungs 5 d after infection was significantly reduced after PA (20 mg/kg to 80 mg/kg) administration. Anti-IFV IgA, IgM, and IgG titers in serum on day 6 were significantly higher in the PA-treated group than the IFV-control group. Anti-IFV immune response augmentation was further confirmed by the elevated production of CD3+, CD4+, and CD8+ T cell levels in blood. Furthermore, the levels of inflammatory cytokines, including TNF-alpha, IL-10 and IFN-gamma in serum of mice, were regulated. Lung inflammation was reduced significantly after PA administration, and the effect may be mediated, at least in part, by regulating the lung levels of inflammatory cytokines. Thus, oral administration of PA appears to be able to augment protection against IFV infection in mice via enhancement of host immune responses, and attenuation of systemic and pulmonary inflammatory responses.
authors.affiliation: College of Chinese Medicines, Guangzhou University of Chinese Medicine, Guangzhou, PR China.
authors.forename: Yu-Cui
authors.initials: YC
authors.lastname: Li
authors.forename: Shao-Zhong
authors.initials: SZ
authors.lastname: Peng
authors.forename: Hai-Ming
authors.initials: HM
authors.lastname: Chen
authors.forename: Feng-Xue
authors.initials: FX
authors.lastname: Zhang
authors.forename: Pei-Ping
authors.initials: PP
authors.lastname: Xu
authors.forename: Jian-Hui
authors.initials: JH
authors.lastname: Xie
authors.forename: Jing-Jin
authors.initials: JJ
authors.lastname: He
authors.forename: Jian-Nan
authors.initials: JN
authors.lastname: Chen
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Lai
authors.forename: Zi-Ren
authors.initials: ZR
authors.lastname: Su
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood / Q000276:immunology; D016207:Cytokines / Q000097:blood; D004365:Drugs, Chinese Herbal / Q000627:therapeutic use*; D005260:Female; D029521:Alphainfluenzavirus / Q000235:genetics / Q000276:immunology* / Q000472:pathogenicity; D019686:Lamiaceae; D008168:Lung / Q000187:drug effects / Q000276:immunology / Q000473:pathology; D008297:Male; D051379:Mice; D009976:Orthomyxoviridae Infections / Q000276:immunology / Q000473:pathology / Q000517:prevention & control*; D008517:Phytotherapy; D012367:RNA, Viral / Q000032:analysis; D012717:Sesquiterpenes / Q000627:therapeutic use*
chemical_list: D000914:Antibodies, Viral; D016207:Cytokines; D004365:Drugs, Chinese Herbal; D012367:RNA, Viral; D012717:Sesquiterpenes; C052983:patchouli alcohol