title: Effects of growth factors and feeder cells on porcine primordial germ cells in vitro.
abstract: As embryonic stem (ES) cells are not available in swine, embryonic germ (EG) cells derived from primordial germ cells (PGCs) are an alternate source of pluripotent embryonic cells for genetic modification through homologous recombination. Although morphological and biochemical characteristics are similar between ES and EG cells, culture conditions are quite different. To optimize the culture condition for the establishment of porcine EG cells, porcine PGCs were cultured in vitro with various combinations of growth factors (leukemia inhibitory factor [LIF], stem cell factor [SCF], and basic fibroblast growth factor [bFGF]) and on different kinds of feeder cells (STO, TM(4), Sl/Sl(4) m220, porcine embryonic fibroblasts, and COS-7 cells). Optimal results were obtained when all three growth factors (LIF, SCF, and bFGF) were present in the media. Also, feeder cells expressing membrane-bound SCF are required for survival and establishment of porcine EG cells. Therefore, a combination of growth factors and proper feeder cells are critical for the establishment of undifferentiated porcine EG cells.
authors.affiliation: Department of Animal Science, Texas A&M University, College Station, TX 077843, USA.
authors.forename: C K
authors.initials: CK
authors.lastname: Lee
authors.forename: J A
authors.initials: JA
authors.lastname: Piedrahita
mesh_terms: D000469:Alkaline Phosphatase / Q000378:metabolism; D000818:Animals; D030801:Animals, Genetically Modified; D019556:COS Cells; D018929:Cell Culture Techniques; D002454:Cell Differentiation; D002462:Cell Membrane / Q000378:metabolism; D002522:Chlorocebus aethiops; D003470:Culture Media / Q000494:pharmacology; D046149:Embryo Culture Techniques; D004622:Embryo, Mammalian / Q000166:cytology*; D016222:Fibroblast Growth Factor 2 / Q000378:metabolism; D005347:Fibroblasts / Q000378:metabolism; D005854:Germ Cells / Q000166:cytology / Q000378:metabolism*; D006133:Growth Substances; D015850:Interleukin-6 / Q000378:metabolism; D053605:Leukemia Inhibitory Factor; D016256:Lewis X Antigen / Q000378:metabolism; D019089:Stem Cell Factor / Q000378:metabolism; D013234:Stem Cells / Q000166:cytology; D013552:Swine
chemical_list: D003470:Culture Media; D006133:Growth Substances; D015850:Interleukin-6; D053605:Leukemia Inhibitory Factor; D016256:Lewis X Antigen; D019089:Stem Cell Factor; D016222:Fibroblast Growth Factor 2; D000469:Alkaline Phosphatase