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2015 ; 16
(1
): 105
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Uridine supplementation exerts anti-inflammatory and anti-fibrotic effects in an
animal model of pulmonary fibrosis
#MMPMID26369416
Cicko S
; Grimm M
; Ayata K
; Beckert J
; Meyer A
; Hossfeld M
; Zissel G
; Idzko M
; Müller T
Respir Res
2015[Sep]; 16
(1
): 105
PMID26369416
show ga
RATIONALE: Pulmonary fibrosis is a progressive disease with only few treatment
options available at the moment. Recently, the nucleoside uridine has been shown
to exert anti-inflammatory effects in different animal models, e.g. in acute lung
injury or bronchial asthma. METHOD: Therefore, we investigated the influence of
uridine supplementation on inflammation and fibrosis in the classical bleomycin
model. Male C57BL/6 mice received an intratracheal injection of bleomycin on day
0 and were treated intraperitoneally with uridine or vehicle. The degree of
inflammation and fibrosis was assessed at different time points. RESULTS: Uridine
administration resulted in attenuated inflammation, as demonstrated by reduced
leukocytes and pro-inflammatory cytokines in the broncho-alveolar lavage (BAL)
fluid. Furthermore, collagen deposition in the lung interstitium was also reduced
by uridine supplementation. Similar results were obtained in a model in which
animals received repeated intraperitoneal bleomycin injections. In addition
uridine inhibited collagen and TGF-ß synthesis by primary lung fibroblasts, the
release of pro-inflammatory cytokines by human lung epithelial cells, as well as
the production of reactive oxygen species by human neutrophils. CONCLUSION: In
summary, we were able to show that uridine has potent anti-inflammatory and
anti-fibrotic properties. As uridine supplementation has been shown to be well
tolerated and safe in humans, this might be a new therapeutic approach for the
treatment of fibrotic lung diseases.
|Animals
[MESH]
|Anti-Inflammatory Agents/*pharmacology
[MESH]
|Bleomycin
[MESH]
|Bronchoalveolar Lavage Fluid/chemistry
[MESH]
|Cell Line, Tumor
[MESH]
|Collagen/metabolism
[MESH]
|Cytokines/metabolism
[MESH]
|Disease Models, Animal
[MESH]
|Epithelial Cells/drug effects/metabolism
[MESH]
|Fibroblasts/drug effects/metabolism
[MESH]
|Humans
[MESH]
|Inflammation Mediators/metabolism
[MESH]
|Leukocytes/drug effects/metabolism
[MESH]
|Lung/*drug effects/metabolism/pathology
[MESH]
|Male
[MESH]
|Mice, Inbred C57BL
[MESH]
|Pneumonia/chemically induced/metabolism/pathology/*prevention & control
[MESH]
|Pulmonary Fibrosis/chemically induced/metabolism/pathology/*prevention & control
[MESH]