title: Derivation and characterization of human embryonic germ cells: serum-free culture and differentiation potential.
abstract: This study examined the effects of a chemically defined culture medium supplement, knock-out serum replacement (KSR), on the growth and differentiation of human embryonic germ cells (hEgc) and found that the efficiency of the initial establishment of hEGC lines in KSR medium was significantly higher than in fetal calf serum (FCS) medium. The percentage of undifferentiated hEGC colonies growing in KSR medium was significantly higher than in FCS-based medium (P < 0.05). The hEGC colonies showed typical mouse embryonic germ cell-like morphology. They showed normal and stable diploid karyotype and expressed alkaline phosphatase (AP), stage-specific embryonic antigens (SSEA) and other specific markers of pluripotent cells. In addition, hEGC could form simple and cystic embryoid bodies (EB) that consisted of various cell types including neural, epithelial and rhythmically beating cardiac cells, even sperm-like and oocyte-like cells. Tumour-like outgrowths were formed in nude mice and found to contain a variety of cell types, including uterine epithelium, adipocytes, squamous tissue and skin structures. In conclusion, an appropriate serum-free culture system has been developed for the establishment of hEGC lines. This may provide an in-vitro model to study differentiation and can be used as a potential source of therapy for infertility and regenerative medicine.
authors.affiliation: College of Veterinary Medicine, Shaanxi Centre of Stem Cells Engineering and Technology, Shaanxi Key Lab for Agriculture Molecular Biotechnology Centre, Northwest A and F University, Yangling, Shaanxi, 712100 China. jlhua2003@126.com
authors.forename: Jinlian
authors.initials: J
authors.lastname: Hua
authors.forename: Haisheng
authors.initials: H
authors.lastname: Yu
authors.forename: Sheng
authors.initials: S
authors.lastname: Liu
authors.forename: Zhongying
authors.initials: Z
authors.lastname: Dou
authors.forename: Yadong
authors.initials: Y
authors.lastname: Sun
authors.forename: Xiaoqi
authors.initials: X
authors.lastname: Jing
authors.forename: Chunrong
authors.initials: C
authors.lastname: Yang
authors.forename: Anmin
authors.initials: A
authors.lastname: Lei
authors.forename: Huayan
authors.initials: H
authors.lastname: Wang
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Gao
mesh_terms: D000818:Animals; D001483:Base Sequence; D002454:Cell Differentiation; D002478:Cells, Cultured; D003470:Culture Media; D016895:Culture Media, Serum-Free; D017931:DNA Primers; D005854:Germ Cells / Q000166:cytology*; D006801:Humans; D007150:Immunohistochemistry; D007621:Karyotyping; D051379:Mice; D008855:Microscopy, Electron, Scanning; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D003470:Culture Media; D016895:Culture Media, Serum-Free; D017931:DNA Primers