HepaRG Cell Test Guideline Adopted for CYP Analysis
The OECD formalized a human cell-based method to identify enzyme-inducing chemicals without animal testing.
Updated on Oct. 13, 2026 in Chemistry
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In 2026, researchers validated a human HepaRG cell-based method for assessing the induction of CYP1A2, CYP2B6, and CYP3A4 enzymes. The protocol was subsequently adopted as an official OECD Test Guideline for chemical safety assessments.
Why it matters
Developing reliable non-animal methods is critical for accurately identifying chemicals with CYP activity. This standardized protocol provides a stable framework for regulatory safety evaluations that avoids the use of animal models.
The validation study confirmed high levels of agreement with expected outcomes across 20 tested substances. Researchers measured induction by quantifying enzyme activity and corroborated these findings using gene expression analysis.
The players
OECD
An international organization that sets standards and guidelines for chemical safety testing and regulatory policy.
The details
The protocol utilizes HepaRG cells, which are human liver cells derived from a hepatoma, to monitor the activity of cytochrome P450 (CYP) enzymes. These enzymes are vital for metabolizing xenobiotics, or foreign chemical substances. By measuring specific enzyme activity levels and subsequent gene expression, the method identifies whether a chemical induces these proteins, indicating a potential for metabolic interactions.
Timeline
2026: The study detailing the HepaRG method was published in ALTEX.
The Tech Race
This adoption follows the systematic integration of in vitro assays into the OECD Test Guidelines Programme. It reflects a wider regulatory shift toward high-throughput human cell models as primary benchmarks for toxicological safety.
Regulatory bodies and chemical manufacturers can now utilize this standardized method to streamline safety assessments. The transition from animal-based testing to this validated human cell approach aims to improve the precision of chemical safety data used in pharmaceutical and industrial sectors.
The takeaway
This method establishes a critical path for replacing animal testing in CYP induction studies with human-derived alternatives. Researchers should monitor future OECD regulatory updates to see if this method becomes mandatory for specific chemical safety dossiers.
Further reading
Learn more about the latest innovations in Chemistry regarding non-animal safety assessment protocols.
Source note: This article includes information reported by Altex.
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