Molecular crosstalk between lncRNA H19, miR-29a, and JAK2/STAT3 signaling in alopecia areata: a preliminary study

Alopecia areata (AA) is a common autoimmune disease which causes non-scarring patches of hair loss and has a 2% lifetime risk. Its chronic, recurrent nature makes treatment difficult. Potential roles of the JAK/STAT pathway, long non-coding RNAs (lncRNAs), & microRNAs (miRNAs) are highlighted by recent discoveries on the pathophysiology of alopecia areata (AA).

This case-control study aimed to assess the role of lncRNA H19, miR-29a, and the JAK2/STAT3 pathway in alopecia areata (AA). We enrolled 29 patients and 30 healthy controls, collected venous blood from all participants, and quantified the expression of the target genes using real-time PCR.

Both miR-29a and lncRNA H19 expression were found to be statistically significantly higher in alopecia areata (AA) patients than in the controls (p < 0.05). However, analysis revealed no significant change in the expression of either JAK2 or STAT3 in patients compared to controls.

This study identifies elevated levels of miR-29a and lncRNA H19 in the blood of alopecia areata patients, suggesting their potential role in disease pathophysiology. In contrast, the absence of significant change in JAK2/STAT3 mRNA points to a mechanism independent of transcriptional upregulation for this pathway. To validate these findings, larger, multi-center studies are needed to confirm these peripheral biomarkers in lesional scalp tissue and define the functional lncRNA H19/miR-29a mechanism.