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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Respir+Cell+Mol+Biol
2015 ; 53
(6
): 822-33
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Regulation of Retinoic Acid Receptor Beta by Interleukin-15 in the Lung during
Cigarette Smoking and Influenza Virus Infection
#MMPMID25923039
Wang J
; Liu W
; Marion C
; Singh R
; Andrews N
; Lee CG
; Elias JA
; Dela Cruz CS
Am J Respir Cell Mol Biol
2015[Dec]; 53
(6
): 822-33
PMID25923039
show ga
Virus-induced exacerbations often lead to further impairment of lung function in
chronic obstructive pulmonary disease. IL-15 is critical in antiviral immune
responses. Retinoic acid (RA) signaling plays an important role in tissue
maintenance and repair, particularly in the lung. We studied RA signaling and its
relation to IL-15 in the lung during cigarette smoke (CS) exposure and influenza
virus infection. In vivo studies show that RA signaling is diminished by
long-term CS exposure or influenza virus infection alone, which is further
attenuated during infection after CS exposure. RA receptor ? (RAR?) is
specifically decreased in the lung of IL-15 transgenic (overexpression; IL-15Tg)
mice, and a greater reduction in RAR? is found in these mice compared with
wild-type (WT) mice after infection. RAR? is increased in IL-15 knockout
(IL-15KO) mice compared with WT mice after infection, and the additive effect of
CS and virus on RAR? down-regulation is diminished in IL-15KO mice. IL-15
receptor ? (IL-15R?) is increased and RAR? is significantly decreased in lung
interstitial macrophages from IL-15Tg mice compared with WT mice. In vitro
studies show that IL-15 down-regulates RAR? in macrophages via IL-15R? signaling
during influenza virus infection. These studies suggest that RA signaling is
significantly diminished in the lung by CS exposure and influenza virus
infection. IL-15 specifically down-regulates RAR? expression, and RAR? may play a
protective role in lung injury caused by CS exposure and viral infections.
|Animals
[MESH]
|Cell Line
[MESH]
|Down-Regulation
[MESH]
|Gene Expression Regulation
[MESH]
|Humans
[MESH]
|Influenza, Human/immunology/*metabolism
[MESH]
|Interleukin-15/*physiology
[MESH]
|Lung/immunology/*metabolism
[MESH]
|Mice, Inbred C57BL
[MESH]
|Mice, Knockout
[MESH]
|Receptors, Interleukin-15/metabolism
[MESH]
|Retinoid X Receptor beta/genetics/*metabolism
[MESH]
|Retinoid X Receptor gamma/genetics/*metabolism
[MESH]