HOTAIRM1 (HOXA Transcript Antisense RNA, Myeloid-Specific 1) is a well-studied long non-coding RNA (lncRNA) located within the human HOXA gene cluster on chromosome 7. It plays a critical role in cellular maturation, epigenetic regulation, and cancer progression.
The term “del3” (or deletion 3) typically refers to a specific splice variant (isoform) of the HOTAIRM1 transcript or a localized genetic deletion within its sequence. 🧬 Biological Functions of HOTAIRM1
HOTAIRM1 serves as a master epigenetic scaffold and regulatory molecule rather than coding for a protein. Its key physiological responsibilities include:
Myelopoiesis: It was originally discovered as a myeloid-specific lncRNA. It is heavily induced by retinoic acid to drive the maturation of granulocytes and white blood cells.
Chromatin Remodeling: It modulates the spatial architecture and histone modifications of adjacent HOXA genes (like HOXA1 and HOXA4), which dictate early tissue development.
Neuronal Differentiation: It guides the transition of pluripotent stem cells into healthy neurons by altering key pluripotency factors. 🔬 The Dual Role of HOTAIRM1 in Cancer
Depending on the specific tissue type and the specific transcript isoform expressed, HOTAIRM1 can act as either a tumor suppressor or an oncogene.
Leave a Reply