RNA seq of HL-60 cells in untreated, ATRA (All- trans retinoic acid) and Vitamin D3 treated conditions
The leukemic cell line HL-60 is widely used to study normal and aberrant myelopoiesis. HL-60 cells can be treated with ATRA (all-trans retinoic acid) and Vit-D3 (1,25-Dihydroxyvitamin D3, calcitriol) to differentiate into granulocytes and monocytes respectively. Induced myeloid differentiation helps us to understand the molecular basis of myeloid differentiation. To understand the genome-wide gene expression changes associated with HL-60 cells upon myeloid differentiation, RNA-sequencing was carried out. We subjected the HL-60 cells with 10 µM ATRA and 50 nM Vit-D3 for 72 hours. Post induction, the uninduced and induced cells were sorted based on CD11b and CD14 markers. The uninduced cells were negative for both the markers while ATRA and Vit D3 inductions were highly positive for CD11b-FITC and CD14-APC-H7 markers respectively. Two biological replicates were used for this experiment. Sorted cells were collected for RNA extraction using RNAeasy Kit from Qiagen and RNA quality was assessed using Bioanalyzer. High quality RNA with RIN values greater than 8, were used to generate library using TrueSeq stranded library preparation kit from Illumina following manufacturer's instructions. Finally, barcoded libraries were pooled, and a final concentration of 10 nM was loaded in HiSeq 2500 Illumina platform and paired-end sequencing for 2*126 cycles were carried out.