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Evaluation of Novel Mouse-Specific Germ Cell Gene Expression in Embryonic Stem Cell-Derived Germ Cell-Like Cells In Vitro with Retinoic Acid Treatment

Maryam Gholamitabar Tabari,S. Jorsaraei,M. Ghasemzadeh-Hasankolaei,A. Ahmadi,M. Amirikia

Published 2018 in Cellular Reprogramming

ABSTRACT

Abstract We designed a study to induce differentiation of Oct4-GFP (expression of Green Fluorescent Protein of oct4) embryonic stem cells (ESCs) by embryoid body (EB) culture system into germ cells (GCs) using retinoic acid (RA) and evaluated the expression level of (Fkbp6, Mov10l1, 4930432K21Rik, and Tex13) in differentiated cells. The expression levels of four GC-related genes, Oct4, Mvh, Scp3, and Stra8, was determined by quantitative real-time polymerase chain reaction (q-RT-PCR). Immunostaining and flow cytometry were used as additional tests to confirm q-RT-PCR findings. A significant increase occurred in the expression of meiotic markers and specific genes, Fkbp6 (p = 0.00), Mov10l1 (p = 0.01), and Tex13 (p = 0.00) in ESCs treated with RA (+RA) compared with the controls (−RA). Oct4 expression was decreased in all studied groups. The expression levels of 4930432K21Rik, Mvh, Stra8, and Scp3 in the +RA group was higher than that of the −RA group. Flow cytometry analysis showed that mean number of Mvh-positive cells in the +RA group was greater as compared with ESCs, −RA and EB7 groups (p = 0.00). Downregulation of Oct4 as a pluripotency factor as well as the expression of meiosis markers, this hypothesis is raised that ESCs are differentiated by RA, and have been introduced into the zygote/pachytene of first meiosis as GC-like cells.

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