studies of molecules potentially important in lesion development , such as mitogens derived from platelets , macrophages , and endothelium , and of the potential roles of lipids in generating these lesions and in inducing injury to the overlying endothelial cells , have begun to shed light on how these processes may occur and on approaches that may be taken to better understand and possibly prevent them .
C0014257
endothelium
C0225336
endothelial cells