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2019 ; 11
(6
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Peroxisome Proliferator-Activated Receptor Gamma (PPAR?) Suppresses Inflammation
and Bacterial Clearance during Influenza-Bacterial Super-Infection
#MMPMID31159430
Gopal R
; Mendy A
; Marinelli MA
; Richwalls LJ
; Seger PJ
; Patel S
; McHugh KJ
; Rich HE
; Grousd JA
; Forno E
; Alcorn JF
Viruses
2019[Jun]; 11
(6
): ä PMID31159430
show ga
Influenza virus is among the most common causes of respiratory illness worldwide
and can be complicated by secondary bacterial pneumonia, a frequent cause of
mortality. When influenza virus infects the lung, the innate immune response is
activated, and interferons and inflammatory mediators are released. This
"cytokine storm" is thought to play a role in influenza-induced lung
pathogenesis. Peroxisome proliferator-activated receptor gamma (PPAR?) is a
member of the nuclear hormone receptor super-family. PPAR? has numerous functions
including enhancing lipid and glucose metabolism and cellular differentiation and
suppressing inflammation. Synthetic PPAR??agonists (thiazolidinediones or
glitazones) have been used clinically in the treatment of type II diabetes. Using
data from the National Health and Nutrition Examination Survey (NHANES), diabetic
participants taking rosiglitazone had an increased risk of mortality from
influenza/pneumonia compared to those not taking the drug. We examined the effect
of rosiglitazone treatment during influenza and secondary bacterial (Methicillin
resistant Staphylococcus aureus) pneumonia in mice. We found decreased influenza
viral burden, decreased numbers of neutrophils and macrophages in bronchoalveolar
lavage, and decreased production of cytokines and chemokines in influenza
infected, rosiglitazone-treated mice when compared to controls. However,
rosiglitazone treatment compromised bacterial clearance during
influenza-bacterial super-infection. Both human and mouse data suggest that
rosiglitazone treatment worsens the outcome of influenza-associated pneumonia.