Project description:Rapid regeneration of smooth muscle after vascular injury is essential for maintaining proper artery function. The current view holds that pre-existing smooth muscle proliferate and expand in responding to vascular injury, contributing to virtually all new smooth muscle cells. Whether resident vascular stem cells for smooth muscle exist remains controversial and their putative functional role for artery repair and regeneration is elusive. Here we performed cell fate mapping and single cell RNA sequencing to identify Sca1+ vascular stem cells (VSCs) residing in the adventitial layer of artery wall.
Project description:Paired samples from human femoral artery lesions were obtained during intravascular surgery exploiting Silverhawk device Microarrays were used to identify genes differentially regulated in human femoral artery atherosclerotic and corresponding restenotic plaques
Project description:To determine the differential expression of genes at sites of vascular injury in mice Four male, 5-6 mo old SMA-GFP mice (numbered 57, 60, 61, and 63) were subjected to fine wire femoral artery injury. The left femoral artery of each mouse was injured, and the contralateral artery was used as an uninjured control. The mice recovered from the injury procedure for 14 days, at which time they were sacrificed. The femoral arteries were removed and the adventitial side was extensively cleaned. The arteries were carefully opened longitudinally and immediately imaged for GFP. GFP-negative regions of the arteries, representing sites of vascular injury were microdissected, quick-frozen on dry ice, and stored in liquid nitrogen. Uninjured arteries were isolated and analyzed similarly; the entire uninjured artery was frozen. Total RNA was prepared. A 100-ng portion of each sample was subjected to linear amplification and hybridized to Affymetrix mouse gene 1.0ST.
Project description:We performed wire-induced injuries in 12 week old C57BL/6J mice. Dilation of the femoral artery was performed by inserting a straight spring wire (0.38 mm diameter) for 10 mm towards the iliac artery, as described previously (Sedding D, Daniel JM, Muhl L, Hersemeyer K, Brunsch H, Kemkes-Matthes B, Braun-Dullaeus RC, Tillmanns H, Weimer T, Preissner KT, Kanse SM. The g534e polymorphism of the gene encoding the factor vii-activating protease is associated with cardiovascular risk due to increased neointima formation. The Journal of experimental medicine. 2006;203:2801-2807). Mice were sacrificed and perfused with phosphate buffered saline via the left ventricle. Femoral arteries were excised at 10 and 21 days after injury, snap-frozen and miRNA was isolated by phenol-chloroform extraction following the purelink
Project description:The age groups were used to investigate how gene expression differences between the brachial and the femoral artery effect the heterogeneous atherosclerotic disease initiation and progression.
Project description:The age groups were used to investigate how gene expression differences between the brachial and the femoral artery effect the heterogeneous atherosclerotic disease initiation and progression. Total RNA was isolated from brachial and femoral arteries of four one week, six one year, and five two year old Rapacz HC swine.
Project description:Endothelial cells play a critical role in multiple cardiovascular diseases. CD34+ cells are believed to be endothelial progenitors that have been used to treat cardiovascular disease. However, the exact identity and the role of CD34+ cells in vascular regeneration remains unclear.Here we performed single cell RNA sequencing to identify heterogeneous CD34+ cells serve as a contributor to endothelial regeneration.