🧬 How HMGN1 Gene Hijacks the Heart in Trisomy 21 (Down's Syndrome) ❤️🫀🔁

🚨 New in Nature 🧬: Groundbreaking study reveals how HMGN1, a dosage-sensitive epigenetic regulator on chromosome 21, reprograms atrioventricular cardiomyocytes into a ventricular fate—driving congenital heart defects in Down syndrome 💔🫀.   Using hiPSCs, single-cell RNA sequencing, and a CRISPRa CROP-seq screen, researchers pinpoint HMGN1 as a causal gene. Strikingly, reducing its dosage in a trisomy 21 mouse model reversed ventricular septal defects (VSDs) 🔧🐭.   This is a model for dissecting aneuploidy-associated disease using human cells + in vivo rescue. Epigenetics meets cardiogenesis in real time. Don't miss this paradigm-shifting work!   📖 DOI: 10.1038/s41586-025-09593-9 #DownSyndrome #Cardiology #Epigenetics #CRISPR #scRNAseq #HMGN1 #CongenitalHeartDefects #StemCells #Nature #GeneDosage #PrecisionMedicine