Blastomeres aggregation as an efficient alternative for trophoblast culture from porcine parthenogenetic embryos

Zona pellucida free (ZPF) oocytes were cultured after electrical activation to allow blastomeres aggregation and compared to ZP intact (ZPI) oocytes. In feeder‐dependent conditions, the trophoblast attachment and primary outgrowths were significantly higher in ZPF than in ZPI groups. In feeder‐free conditions, trophoblast attachment and typical morphological trophoblast primary outgrowths were observed in ZPF group. The primary colonies derived from the ZPF embryos in both culture conditions were able to establish secondary and tertiary colonies and showed mRNA expression of CDX2, TEAD4 and KRT8 as trophoblast markers, while outgrowths from the ZPI embryos could not grow beyond primary colonies.

We propose blastomeres aggregation for generating parthenogenetic embryos. The resulted blastocysts showed increased total and differential cell counts. Trophoblast outgrowths can be achieved in presence or absence of the feeder cells.

Source: Development, Growth and Differentiation - May 19, 2015 Category: Research Authors: Islam M. Saadeldin, Su Jin Kim, Byeong Chun Lee Tags: Original Article Source Type: research