0000000000309078
AUTHOR
Audrey Joannes
The small heat-shock protein α B-crystallin is essential for the nuclear localization of Smad4: impact on pulmonary fibrosis
Idiopathic pulmonary fibrosis (IPF) is a devastating disease characterized by the proliferation of myofibroblasts and the accumulation of extracellular matrix (ECM) in the lungs. TGF-β1 is the major profibrotic cytokine involved in IPF and is responsible for myofibroblast proliferation and differentiation and ECM synthesis. αB-crystallin is constitutively expressed in the lungs and is inducible by stress, acts as a chaperone and is known to play a role in cell cytoskeleton architecture homeostasis. The role of αB-crystallin in fibrogenesis remains unknown. The principal signalling pathway involved in this process is the Smad-dependent pathway. We demonstrate here that αB-crystallin is stron…
FGF-9 overexpression prevents pleural fibrosis induced by intra-pleural adenovirus injection in mice
Introduction: Lung fibrosis is associated with the reactivation of molecular pathways involved in lung development. Mesothelial cells are involved in the fibrotic lung process but their exact role is debated. Fibroblast Growth Factor-9 (FGF-9) is expressed by epithelial cells and visceral pleura during embryonic lung development. Mice homozygous for a targeted disruption of FGF-9 exhibit lung hypoplasia with reduced mesenchyme and early postnatal death. The aim of this study was to evaluate the role of FGF-9 expression by mesothelial cells in the adult lung. We used adenovirus-mediated (FGF-9) gene transfer in mesothelial cells in vivo. Material and Methods: AdFGF9 or a control adenovirus (…
Identification of periplakin as a major regulator of lung injury and repair in mice
IF 12.784 (2016); International audience; Periplakin is a component of the desmosomes that acts as a cytolinker between intermediate filament scaffolding and the desmosomal plaque. Periplakin is strongly expressed by epithelial cells in the lung and is a target antigen for autoimmunity in idiopathic pulmonary fibrosis. The aim of this study was to determine the role of periplakin during lung injury and remodeling in a mouse model of lung fibrosis induced by bleomycin. We found that periplakin expression was downregulated in the whole lung and in alveolar epithelial cells following bleomycin-induced injury. Deletion of the Ppl gene in mice improved survival and reduced lung fibrosis developm…
Le FGF-9 inhibe la fibrose pleurale viro-induite chez la souris
La fibrose pulmonaire idiopathique (FPI) est une pathologie mortelle, predominante en zone sous-pleurale. Elle serait en partie due a une reactivation des voies impliquees dans le developpement pulmonaire. Le Fibroblast Growth Factor-9 (FGF-9) est reexprime par les cellules mesotheliales lors de la FPI. Nous avons determine l’effet de la surexpression de FGF-9 par les cellules mesotheliales chez la souris. Des souris C56/Bl6 ont recu une injection intrapleurale unique de serum physiologique (groupe Phy) ou un adenovirus recombine exprimant le FGF-9 humain (groupe AdFGF-9) ou un adenovirus controle (groupe Adcont), a la concentration de 1 × 108 pfu/mL. Les souris ont ete sacrifiees a j3, j5,…