In vitro studies, primarily in a human microvascular endothelial cell line
“Studies evaluating the pharmacological effects of defibrotide sodium on endothelial cells (ECs) were conducted primarily in the human microvascular endothelial cell line.”
Not reported in the public reviews. Reviewers summarise selectively, so this usually means it wasn't discussed publicly, not that it wasn't studied.
Reviewer's view of the efficacy data
EMA: pharmacological rationale not established; no extrapolation to clinical data based on pharmacological plausibility
“Based on the provided data, the CHMP concluded that the pharmacological rationale for the use of defibrotide has not been established; therefore, no extrapolations to clinical data can be made based on”