WNT4 and hyperinsulinemic hypoglycemia, familial, 4: To reveal if the NEAT1/miR-129-5p signaling axis mediates BRCA1-deficiency-induced upregulation of WNT4 expression and WNT signaling, Western blot analysis of WNT4 and β-catenin in BRCA1-knockdown cells with or without co-overexpression of miR- 129- 5p was performed.