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INTRODUCTION


CRI Center




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2. »ý½Ä¼¼Æ÷ À¯ÀüÀÚ Á¦¾î ¹× ÇüÁúÀüȯ Á¶·ù »ý»ê ¿¬±¸

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Germ cells are the only cell population that can transfer genetic information to future generations, understanding the development and differentiation of the cells has very high academic research value. Because avian primordial germ cells can be cultured in vitro and produce germline chimera efficiently, these are very suitable for physiological characteristic of germ cell development and the production of transgenic animal through programmed genome editing. Therefore, there is an increasingly strong demand for the characterization of primordial germ cells and novel transgenic techniques with high efficiency in avian species.

The aim of this project is to establish a comprehensive understanding of biological mechanisms of avian germ cells using a combined approach involving genome-editing technology and germ cell manipulation. By combining the in vitro culture systems of germline-competent cell lines and genome modulation tools, we are also obtaining a comprehensive understanding of germ cell-signaling networks including factors related to specification, development and (de)differentiation of germ cells. Furthermore, our research team aims to pioneer new fields of study and establish a reliable system for the conservation of avian genetic resources for the contribution of development of academic and industrial sectors.

In order to achieve the research goals above, we configured the key research groups around the two main research areas as follows:

1. Germ cell signaling network and its application

Unlike any other species, avian primordial germ cells can be cultured for a long period without losing their unique characteristics. In vitro culture of chicken PGCs has provided in-depth knowledge on their biology using a high-throughput approach, including analysis of methylation status, non-coding RNA profiling and gene expression patterns. Therefore, we aim to identify the expression profile of various RNAs, including non-coding RNAs and epigenetic elements in germ cells, to develop a comprehensive understanding of mechanisms of germ cell (de)differentiation.

 

2. Establishment of innovative avian systems through germ cell-mediated technologies

In mammalian species, various techniques have been developed to generate germline chimeras and transgenic animals, such as pronuclear injection, nuclear transfer, and stem cell transplantation. However, in avian species, novel strategies are required due to the unique physiological differences of avian species. Primordial germ cells are the only means to overcome germline competency and conserve the genetic resources. Based on the gene-targeting technologies and genetic modulation system, we aim to secure the bird breed lines with high added value in economic, industrial and academic sectors, including modulation of egg white protein composition, transgenic model animals, and restoration of endangered species.

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