VIM and benign prostatic hyperplasia: Primary prostate stromal cells were collected from BPH patients undergoing prostatectomy and patients without BPH undergoing cystectomy. Pyegeum africanum was introduced to both populations of cells and proliferation assays were collected after. Levels of apoptosis, transforming growth factor B1, fibroblast growth factor 2, vimentin, alpha-smooth muscle actin, and smoothelin levels were examined following the treatment with Pyegeum africanum.