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2017 ; 8
(ä): 1542
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
Protective Effect of Panax notoginseng Root Water Extract against Influenza A
Virus Infection by Enhancing Antiviral Interferon-Mediated Immune Responses and
Natural Killer Cell Activity
#MMPMID29181006
Choi JG
; Jin YH
; Lee H
; Oh TW
; Yim NH
; Cho WK
; Ma JY
Front Immunol
2017[]; 8
(ä): 1542
PMID29181006
show ga
Influenza is an acute respiratory illness caused by the influenza A virus, which
causes economic losses and social disruption mainly by increasing hospitalization
and mortality rates among the elderly and people with chronic diseases. Influenza
vaccines are the most effective means of preventing seasonal influenza, but can
be completely ineffective if there is an antigenic mismatch between the seasonal
vaccine virus and the virus circulating in the community. In addition, influenza
viruses resistant to antiviral drugs are emerging worldwide. Thus, there is an
urgent need to develop new vaccines and antiviral drugs against these viruses. In
this study, we conducted in vitro and in vivo analyses of the antiviral effect of
Panax notoginseng root (PNR), which is used as an herbal medicine and nutritional
supplement in Korea and China. We confirmed that PNR significantly prevented
influenza virus infection in a concentration-dependent manner in mouse
macrophages. In addition, PNR pretreatment inhibited viral protein (PB1, PB2, HA,
NA, M1, PA, M2, and NP) and viral mRNA (NS1, HA, PB2, PA, NP, M1, and M2)
expression. PNR pretreatment also increased the secretion of pro-inflammatory
cytokines [tumor necrosis factor alpha and interleukin 6] and interferon
(IFN)-beta and the phosphorylation of type-I IFN-related proteins (TANK-binding
kinase?1, STAT1, and IRF3) in vitro. In mice exposed to the influenza A H1N1
virus, PNR treatment decreased mortality by 90% and prevented weight loss (by
approximately 10%) compared with the findings in untreated animals. In addition,
splenocytes from PNR-administered mice displayed significantly enhanced natural
killer (NK) cell activity against YAC-1 cells. Taking these findings together,
PNR stimulates an antiviral response in murine macrophages and mice that protects
against viral infection, which may be attributable to its ability to stimulate NK
cell activity. Further investigations are needed to reveal the molecular
mechanisms underlying the protective effects of PNR and its components against
influenza virus A infection.