LCE1D (late cornified envelope 1D) is a precursor protein for the cornified envelope of the stratum corneum, contributing to epidermal barrier function 1. The gene exhibits calcium-responsive expression and functions in protein-binding interactions within the cytoplasm and perinuclear regions [GO annotations]. LCE1D is recognized as a skin-specific mRNA biomarker, successfully detected in contact traces including fingerprints and clothing, making it valuable for forensic tissue identification when combined with DNA profiling methods 1. A stop codon mutation (rs41268500) in LCE1D has been identified as a putatively functional polymorphism in the epidermal differentiation complex, though association testing did not reveal significant eczema association compared to other EDC variants like SPRR3 2. Recent transcriptomic analyses identified LCE1D as an upregulated hub gene in human dermal fibroblasts responding to mechanical stretch at both early (5h) and late (24h) stages, implicating it in skin development and tissue expansion responses 3. Additionally, LCE1D was identified as a differentially expressed gene distinguishing subtypes of coronary artery disease patients, though its specific role in vascular pathology requires further investigation 4. Overall, LCE1D functions primarily in epidermal barrier maintenance with emerging roles in tissue regeneration and potential systemic disease associations.