title: A novel stromal cell-dependent hematopoietic cell line established from temperature-sensitive SV40 T-antigen transgenic mice.
abstract: A novel primitive hematopoietic cell line, THS119, was established from lineage marker negative (Lin-)/Sca-1+ cells from bone marrow of temperature-sensitive (ts) SV40 T-antigen transgenic mice after lengthy passaging by coculture with TBR59 bone marrow stromal cells. THS119 cells exhibited immature primitive hematopoietic cells such as forming cobblestones underneath the stromal cell layers. They retained properties of hematopoietic stem cells as shown by expression of c-Kit, Sca-1 and CD34low, but lacked hematopoietic lineage surface markers of differentiated hematopoietic cells (Gr-1, TER119, Mac-1, CD3, B220). RT-PCR analysis showed that THS119 cells exhibited multiple expression of both earlier developmental markers of myeloid, lymphoid and the hematopoietic cell specific transcription factors. THS119 cells showed temperature-dependent growth reflecting ts T-antigen, and their maintenance was TBR59 stromal cell-dependent. The requirement of stromal cells could not be replaced by cytokines, however, an IL-3 or IL-7 dependent cell line was generated after prolonged culture of THS119 cells on the stromal cells in the presence of these cytokines, and these cytokine-dependent cell lines exhibited phenotypes similar to the parental cells in their gene expression. SCF/c-Kit interaction is one factor required for their maintenance, but involvement of other factor(s) in the conditioned medium of TBR59 stromal cells was suggested. A novel immature hematopoietic cell line, THS119, may provide an appropriate experimental system to resolve how hematopoietic cells are kept in a primitive phase within a hematopoietic microenvironment.
authors.affiliation: Department of Cell Biology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan.
authors.forename: N
authors.initials: N
authors.lastname: Yanai
authors.forename: N
authors.initials: N
authors.lastname: Matsui
authors.forename: K I
authors.initials: KI
authors.lastname: Matsuda
authors.forename: T
authors.initials: T
authors.lastname: Furusawa
authors.forename: T
authors.initials: T
authors.lastname: Okubo
authors.forename: T
authors.initials: T
authors.lastname: Nakazawa
authors.forename: K
authors.initials: K
authors.lastname: Ishibashi
authors.forename: K
authors.initials: K
authors.lastname: Nawa
authors.forename: M
authors.initials: M
authors.lastname: Obinata
mesh_terms: D000818:Animals; D018952:Antigens, CD34 / Q000032:analysis / Q000235:genetics; D000950:Antigens, Ly / Q000032:analysis / Q000235:genetics; D000952:Antigens, Polyomavirus Transforming / Q000235:genetics*; D001854:Bone Marrow Cells / Q000166:cytology*; D002454:Cell Differentiation; D002455:Cell Division; D002460:Cell Line; D018920:Coculture Techniques; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D007377:Interleukin-3 / Q000494:pharmacology; D015851:Interleukin-7 / Q000494:pharmacology; D008565:Membrane Proteins / Q000032:analysis / Q000235:genetics; D051379:Mice; D008810:Mice, Inbred C57BL; D008822:Mice, Transgenic; D019009:Proto-Oncogene Proteins c-kit / Q000032:analysis / Q000235:genetics; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017154:Stromal Cells / Q000502:physiology*; D013696:Temperature
chemical_list: D018952:Antigens, CD34; D000950:Antigens, Ly; D000952:Antigens, Polyomavirus Transforming; D007377:Interleukin-3; D015851:Interleukin-7; C074650:Ly6a protein, mouse; D008565:Membrane Proteins; D012333:RNA, Messenger; D019009:Proto-Oncogene Proteins c-kit