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- W2022164830 abstract "<i>Background:</i> Granulocyte macrophage colony-stimulating factor (GM-CSF) deficiency affects the production and fiber assembly/organization of the vascular collagenous matrix; structural alterations to the elastic system were observed. The present study elaborates the effect of GM-CSF deficiency on the vascular elastin system. <i>Methods and Results:</i> Histological examination of the aorta of GM-CSF-deficient mice revealed structurally altered elastic fibers. The elastic fiber area was significantly enhanced, whereas the remaining medial area was not affected. Aortic size was significantly increased. Reverse transcription polymerase chain reaction demonstrated decreased expression levels of tropoelastin, lysyl oxidase and bone morphogenetic protein 1 (BMP-1). Cell culture studies on vascular smooth muscle cells showed that after clearance of GM-CSF with GM-CSF antibodies, the tropoelastin mRNA expression was markedly reduced. Concomitantly, lysyl oxidase and BMP-1 mRNA levels were decreased. Treatment with GM-CSF stimulated the expression of these mRNAs. <i>Conclusions:</i> Our studies demonstrate that disorganization of elastic lamellae as induced by GM-CSF deficiency is associated with adaptive vascular remodeling. The decreased tropoelastin expression observed is associated with elastic fiber hypertrophy. This paradox effect may be explained by decreased expression levels of lysyl oxidase and BMP-1, both mediating cross-linkage and thus assembly and organization of elastic fibers. From our data, we conclude that GM-CSF is a prerequisite for the maintenance of structural integrity of the vessel wall." @default.
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- W2022164830 date "2007-10-12" @default.
- W2022164830 modified "2023-10-17" @default.
- W2022164830 title "Granulocyte Macrophage Colony-Stimulating Factor Deficiency Affects Vascular Elastin Production and Integrity of Elastic Lamellae" @default.
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- W2022164830 doi "https://doi.org/10.1159/000109819" @default.
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