PHM1-41 cells are a human microvascular endothelial cell line that is commonly used in research to study angiogenesis, vascular permeability, and inflammation. These cells are often used as an in vitro model for investigating the mechanisms of vascular diseases and developing new therapeutic strategies., These cells are provided as a fraction of a 100 mm dish or at a concentration of 1E6 cells. They are typically cultured in a specialized endothelial cell culture medium supplemented with growth factors and antibiotics.