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2016 ; 12
(8
): e1005804
Nephropedia Template TP
gab.com Text
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English Wikipedia
An Epithelial Integrin Regulates the Amplitude of Protective Lung Interferon
Responses against Multiple Respiratory Pathogens
#MMPMID27505057
Meliopoulos VA
; Van de Velde LA
; Van de Velde NC
; Karlsson EA
; Neale G
; Vogel P
; Guy C
; Sharma S
; Duan S
; Surman SL
; Jones BG
; Johnson MD
; Bosio C
; Jolly L
; Jenkins RG
; Hurwitz JL
; Rosch JW
; Sheppard D
; Thomas PG
; Murray PJ
; Schultz-Cherry S
PLoS Pathog
2016[Aug]; 12
(8
): e1005804
PMID27505057
show ga
The healthy lung maintains a steady state of immune readiness to rapidly respond
to injury from invaders. Integrins are important for setting the parameters of
this resting state, particularly the epithelial-restricted ?V?6 integrin, which
is upregulated during injury. Once expressed, ?V?6 moderates acute lung injury
(ALI) through as yet undefined molecular mechanisms. We show that the
upregulation of ?6 during influenza infection is involved in disease
pathogenesis. ?6-deficient mice (?6 KO) have increased survival during influenza
infection likely due to the limited viral spread into the alveolar spaces leading
to reduced ALI. Although the ?6 KO have morphologically normal lungs, they harbor
constitutively activated lung CD11b+ alveolar macrophages (AM) and elevated type
I IFN signaling activity, which we traced to the loss of ?6-activated
transforming growth factor-? (TGF-?). Administration of exogenous TGF-? to ?6 KO
mice leads to reduced numbers of CD11b+ AMs, decreased type I IFN signaling
activity and loss of the protective phenotype during influenza infection.
Protection extended to other respiratory pathogens such as Sendai virus and
bacterial pneumonia. Our studies demonstrate that the loss of one epithelial
protein, ?V?6 integrin, can alter the lung microenvironment during both
homeostasis and respiratory infection leading to reduced lung injury and improved
survival.
|Adoptive Transfer
[MESH]
|Animals
[MESH]
|Antigens, Neoplasm/*immunology
[MESH]
|Disease Models, Animal
[MESH]
|Enzyme-Linked Immunosorbent Assay
[MESH]
|Female
[MESH]
|Flow Cytometry
[MESH]
|Fluorescent Antibody Technique
[MESH]
|Immunoblotting
[MESH]
|Integrins/*immunology
[MESH]
|Interferon Type I/*biosynthesis/*immunology
[MESH]