NDLI: A truncated SV40 large T antigen lacking the p53 binding domain overcomes p53-induced growth arrest and immortalizes primary mesencephalic cells

Content Provider	Springer Nature Link
Author	Truckenmiller, M. E. Tornatore, Carlo Wright, Renee D. Dillon Carter, O. Meiners, Sally Geller, Herbert M. Freed, William J.
Copyright Year	1998
Abstract	As an alternative to primary fetal tissue, immortalized central nervous system (CNS)-derived cell lines are useful for in vitro CNS model systems and for gene manipulation with potential clinical use in neural transplantation. However, obtaining immortalized cells with a desired phenotype is unpredictable, because the molecular mechanisms of growth and differentiation of CNS cells are poorly understood. The SV40 large T antigen is commonly used to immortalize mammalian cells, but it interferes with multiple cell-cycle components, including p53, p300, and retinoblastoma protein, and usually produces cells with undifferentiated phenotypes. In order to increase the phenotypic repertoire of immortalized CNS cells and to address the molecular mechanisms underlying immortalization and differentiation, we constructed an expression vector containing a truncated SV40 large T gene that encodes only the amino-terminal 155 amino acids (T155), which lacks the p53-binding domain. Constructs were first transfected into a p53-temperature-sensitive cell line, T64-7B. Colonies expressing T155 proliferated at the growth-restrictive temperature. T155 was then transfected into primary cultures from embryonic day-14 rat mesencephalon. Two clonal cell lines were derived, AF-5 and AC-10, which co-expressed T155 and mature neuronal and astrocytic markers. Thus, the amino-terminal portion of SV40 large T is sufficient to: (1) overcome p53-mediated growth arrest despite the absence of a p53-binding region, and (2) immortalize primary CNS cells expressing mature markers while actively dividing. T155 and T155-transfectants may be useful for further studies of cell-cycle mechanisms and phenotyic expression in CNS cells or for further gene manipulation to produce cells with specific properties.
Starting Page	175
Ending Page	189
Page Count	15
File Format	PDF
ISSN	0302766X
Journal	Cell and Tissue Research
Volume Number	291
Issue Number	2
e-ISSN	14320878
Language	English
Publisher	Springer-Verlag
Publisher Date	1998-01-12
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Cell Biology Histology Pathology and Forensic Medicine

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