How toxicophore screening can support non-mutagenic impurity assessment as one line of evidence in a broader weight-of-evidence framework.
Toxicophore screening searches for structural features associated with particular toxicity concerns. It can help prioritize questions and identify data gaps, but it should not be treated as a definitive prediction of organ toxicity.
Screening role
Alerts can identify structures that deserve closer review.
Endpoint context
General-toxicity alerts differ from DNA-reactive mutagenicity alerts and often involve more complex, multifactorial biology.
Applicability and uncertainty
Model coverage and the quality of supporting data affect how much weight a prediction deserves.
Integration
Screening should be combined with exposure, analogue information, API data, experimental evidence and expert judgment.
Frequently asked questions
Is a toxicophore a diagnosis of toxicity?
No.
Can absence of an alert prove safety?
No.
Why use toxicophore screening?
It can focus the assessment and reveal potential concerns early.
Should results be interpreted by a toxicologist?
Yes, especially for regulatory conclusions.
