4Halberstadt C,Emerich DF,Gores P.Use of Sertoli cell transplants to provide local immunoprotection for tissue grafts[J].Expert Opin Biol Ther.2004 Jun;4(6):813-25.
5Richards M,Fong CY,Chan WK,et el.Human feeders support prolonged undiferentiared growth of human inner cell masses and embryonic stem cells[J].Nat Biotechnol.2002,20(9):933-936.
6Lee JB,SongJM,LeeJE,et al.Available human feeder cells for the maintenance of human embryonic stem cells[J].Reproduction.2004 Dec;128(6):727-35.
7Xu C,Rosier E,Jiang J,et al.Basic fibroblast growth factor supports undifferentiated human embryonic stem cell growth without conditioned mediun[J].Stem Cells.2005 Mar;23(3):315-23.
9Ying Y,Zhao GQ,Cooperation of endoderm-derived BMP2 and extraembryonic ectoderm-derived BMP4 in primordial germ cell generation in the mouse[J].Dec Biol,2001 Apr 15;232(2):484-92.
10Pellegrini M,Grimaldi P,Rossi P,et al.Developmental expression of BMP4/ALK3/SMAD5 signaling pathway in the mouse testis:apotential role of BMP4 in spermatogonia differentiation[J].J Cell Sci.2003 Aug;116(pt16):3363-72.