title: Application of recombinant human leukemia inhibitory factor (LIF) produced in rice (Oryza sativa L.) for maintenance of mouse embryonic stem cells.
abstract: Embryonic and induced pluripotent stem cells have the ability to differentiate into any somatic cell type, and thus have potential to treat a number of diseases that are currently incurable. Application of these cells for clinical or industrial uses would require an increase in production to yield adequate numbers of viable cells. However, the relatively high costs of cytokines and growth factors required for maintenance of stem cells in the undifferentiated state have the potential to limit translational research. Leukemia inhibitory factor (LIF), a member of the IL-6 cytokine family, is a key regulator in the maintenance of naïve states for both human and mouse stem cells. In this study, we describe a new recombinant human LIF (rhLIF) using a plant-based (rice) expression system. We found that rice-derived rhLIF possessed the same specific activity as commercial Escherichia coli-derived LIF and was capable of supporting mouse embryonic stem cell proliferation in the undifferentiated state as evidenced from pluripotency marker level analysis. Retention of the pluripotent state was found to be indistinguishable between rice-derived rhLIF and other recombinant LIF proteins currently on the market.
authors.affiliation: Department of Cell Biology & Biochemistry, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, TX 79430-6540, USA.
authors.forename: Bradford A
authors.initials: BA
authors.lastname: Youngblood
authors.affiliation: InVitria, 320 East Vine Drive, Suite 223, Fort Collins, CO 80524, USA.
authors.forename: Randall
authors.initials: R
authors.lastname: Alfano
authors.affiliation: InVitria, 320 East Vine Drive, Suite 223, Fort Collins, CO 80524, USA.
authors.forename: Steve C
authors.initials: SC
authors.lastname: Pettit
authors.affiliation: Ventria Bioscience Inc., 320 East Vine Drive, Suite 223, Fort Collins, CO 80524, USA.
authors.forename: Deshui
authors.initials: D
authors.lastname: Zhang
authors.affiliation: Ventria Bioscience Inc., 320 East Vine Drive, Suite 223, Fort Collins, CO 80524, USA.
authors.forename: H Garry
authors.initials: HG
authors.lastname: Dallmann
authors.affiliation: Ventria Bioscience Inc., 320 East Vine Drive, Suite 223, Fort Collins, CO 80524, USA.
authors.forename: Ning
authors.initials: N
authors.lastname: Huang
authors.affiliation: Department of Cell Biology & Biochemistry, Texas Tech University Health Sciences Center, 3601 4th Street, Lubbock, TX 79430-6540, USA. Electronic address: clint.macdonald@ttuhsc.edu.
authors.forename: Clinton C
authors.initials: CC
authors.lastname: Macdonald
mesh_terms: D000818:Animals; D049109:Cell Proliferation; D002478:Cells, Cultured; D004622:Embryo, Mammalian; D053595:Embryonic Stem Cells / Q000276:immunology*; D006801:Humans; D057026:Induced Pluripotent Stem Cells / Q000276:immunology; D053605:Leukemia Inhibitory Factor / Q000378:metabolism*; D051379:Mice; D008810:Mice, Inbred C57BL; D012275:Oryza / Q000235:genetics* / Q000378:metabolism; D030821:Plants, Genetically Modified; D011994:Recombinant Proteins / Q000378:metabolism*; D057170:Translational Research, Biomedical
chemical_list: C507837:LIF protein, human; D053605:Leukemia Inhibitory Factor; D011994:Recombinant Proteins
keywords: LIF; Nanog; Oct4; Recombinant protein expression; SSEA-1