Pluto Bioinformatics

GSE114981 (human): Activation of HOTTIP lncRNA perturbs HSC function leading to AML like disease

Bulk RNA sequencing

We found that posterior HOXA-associated HOTTIP lncRNA is aberrantly activated in MLL-rearranged AMLs and required for the posterior HOXA chromatin structure and gene expression. Knock-out of HOTTIP attenuates leukemic progressions of the transplanted humanized AML mice by blocking posterior HOXA-associated AML gene expression programs while the dCas-VP160 mediated reactivation of HOTTIP restores HOXA locus chromatin structure and HOXA9-A13 gene expression in the CBS7/9 boundary depleted AML cells. Finally, transgenic expression of HOTTIP lncRNA in mouse bone marrow hematopoietic cells resulted in perturbation of the balance of HSC self-renewal and differentiation and development of AML like disease by aberrant altering HOXA associated chromatin structure and transcription program. Thus, HOTTIP lncRNA acts as oncogene to reprogram leukemic associated chromatin and gene transcription. SOURCE: Suming Huang (huanglabseq@hotmail.com) - Penn State University