Protein tyrosine phosphatase 4A3(PTP4A3) promotes enucleation in mouse fetal liver-derived erythroid cells

doi:10.16352/j.issn.1001-6325.2022.07.1026

Abstract

Abstract: Objective To investigate the expression and function of protein tyrosine phosphatase 4A3(PTP4A3) in terminal erythroid differentiation and underlying molecular mechanism. Methods RT-qPCR was used to detect the expression of Ptp4a3 during terminal differentiation. Knockdown of Ptp4a3 expression in mouse fetal liver induced erythroid differentiation system by short hairpin RNA(shRNA) interference, the knockdown efficiency was verified by RT-qPCR after GFP positive cells were sorted by flow cytometry, and the effect of Ptp4a3 knockdown on erythroid differentiation and enucleation was detected by flow cytometry. Transcriptional profiling was performed to explore the potential downstream pathways of Ptp4a3. Results Ptp4a3 was among the top 100 ranked expressing genes during mouse terminal erythroid differentiation, and its expression gradually increased following the differentiation process. In mouse fetal liver-derived erythroid cells, Ptp4a3 was successfully knocked down by shRNA interference. Flow cytometry analysis showed that Ptp4a3 knockdown significantly decreased the proportion of enucleated erythrocytes(P＜0.05). Transcriptome analysis revealed that Ptp4a3 knockdown resulted in upregulation of cell cycle-related genes. Conclusions PTP4A3 is highly expressed in late stage of terminal erythroid differentiation. Knockdown Ptp4a3 significantly reduces enucleation erythroid of cells.

Key words: protein tyrosine phosphatase 4A3, terminal erythroid differentiation, erythroid enucleation, cell cycle

CLC Number:

HU Xin-jun, YU Dong-lin, FAN Hong, HAN Gai-jing, XUE Zheng, LYU Xiang. Protein tyrosine phosphatase 4A3(PTP4A3) promotes enucleation in mouse fetal liver-derived erythroid cells[J]. Basic & Clinical Medicine, 2022, 42(7): 1026-1030.

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