As shown in Figure 2, atherosclerotic plaque formation was accelerated in the whole aorta, aortic arch, and aortic root of diabetic ApoE KO mice. These observations indicate that diabetes accelerates atherosclerotic plaque formation. BMP4 expression find protocol was also much greater in the whole aortas of diabetic Inhibitors,Modulators,Libraries ApoE KO mice compared with control mice, suggesting that diabetes also induces aortic BMP4 expression in dbdb mice. BMP4 induces the activation of the SMAD158 signaling pathway. In this study, diabetic ApoE KO mice showed strong activation of BMP4SMAD158 signaling in aortas compared with control ApoE KO mice due to increased expression of BMP4 in the diabetic aortas. These data suggest that BMP4 may be one of the important regulators to progress plaque formation under lying diabetes diseases.
There is evidence indicating that BMP antagonists and signaling pathway inhibitors block activation of SMAD158 signaling, Inhibitors,Modulators,Libraries and thereby reduce the incidence of subsequent events, including vascular inflammation and atherosclerosis. These findings suggest that BMP signals are novel therapeutic targets for vascular inflammation andor atherosclerosis. To examine the localization of BMP4 expression in the aorta, we performed double fluorescence staining of monocytesmacrophages and BMP4. The BMP4 and monocytemacrophage positive areas were largely colocalized in the atherosclerotic plaque of aortic roots, as shown in Figure 4A. Lesional monocytes and macrophages are the main cell types involved in the progression of atherosclerotic plaques, because the phagocytic activity of macrophages in the plaque contrib utes to the development of atherosclerosis and plaque instability.
BMP4 treatment increased 2. 6 fold the number of cells with oxLDL uptake, when compared with controls. This marked increase Inhibitors,Modulators,Libraries in macrophages showing oxLDL uptake was significantly inhibited by 50% when cells were treated with Noggin. These results suggest that the increase in BMP4 expres sion associated with diabetes will enhance the uptake of oxLDL into macrophages in atherosclerotic lesions. Inhibitors,Modulators,Libraries Therefore, it is very likely that diabetes accelerates the for mation of atherosclerotic plaques and lowers the threshold for destabilization and rupture of atherosclerotic lesions. In conclusion, we have demonstrated that BMP4 is expressed in monocytesmacrophages in atherosclerotic plaques in a mouse model of diabetes and atherosclerosis.
We also found that BMP4 enhances oxLDL uptake into peritoneal macrophages in vitro. The induction of BMP4 in atherosclerotic plaque may promote atherosclerotic plaque formation in diabetes. These findings raise the pos sibility Inhibitors,Modulators,Libraries that inhibition of BMP4 signaling may represent a potential therapeutic target for atherosclerosis and other diseases kinase assay associated with BMPs and diabetes. Introduction Most patients with chronic HBV infection will develop hepatic cirrhosis.