DBE Chinese Domestic Cat (DBE-CDC)

Overview

DBE-CDC (also listed as DBE5 in some commercial testing panels) is a variant currently offered for genetic testing by at least one laboratory but not yet described in the peer-reviewed scientific literature. As of 2026, no published study, preprint or OMIA entry characterises this variant.

Unlike DBE-CEL, DBE-ALT, DBE-RE and DBE-AGO — each of which has been formally described and peer-reviewed — DBE-CDC has not been independently validated in the scientific literature. Its designation, following the naming convention used for other DBE variants, most likely refers to the breeding line in which it was first identified rather than to a published genomic characterisation.

Location and Molecular Mechanism

Not established in the peer-reviewed literature.

Because no scientific publication describing DBE-CDC is currently available, its genomic location, mutation type and molecular mechanism cannot be stated. It is not known whether it is a coding or non-coding variant, nor how it may affect the PAX3 protein or its expression.

Associated Phenotype and Hearing

No peer-reviewed phenotypic or BAER hearing data have been published for DBE-CDC. Any association with eye colour, white spotting or hearing status therefore cannot currently be assessed against the scientific literature.

How to Interpret a DBE-CDC Result

A laboratory result reporting DBE-CDC (or DBE5) confirms that the laboratory has detected a specific genetic marker in the tested cat. However, because the variant has not been peer-reviewed, a positive result cannot be interpreted in the same evidence-based framework as the four published variants.

The absence of a publication does not prove that the variant does not exist genetically; it means only that its biological effect, phenotype and health implications have not yet been scientifically documented. Until such data are published, DBE-CDC results should be treated with appropriate caution, and no claims regarding health, hearing or breeding safety should be based on them.