Temperature-dependent, neurotrophic factor-elicited, neuronal differentiation in adrenal chromaffin cell line immortalized with temperature-sensitive SV40 T-antigen

被引:8
作者
Murata, T
Hikita, K
Tsuboi, M
Niwa, K
Suzuki, M
Kaneda, N [1 ]
机构
[1] Meijo Univ, Dept Analyt Neurobiol, Fac Pharm, Tempa Ku, Nagoya, Aichi 4688503, Japan
[2] Kumamoto Univ, Div Transgen Technol, Ctr Anim Resources & Dev, Kumamoto, Japan
关键词
adrenal chromaffin cells; immortalization; neuronal differentiation; neurotrophic factor; temperature-sensitive SV40 T-antigen; tsAM5D cells;
D O I
10.1046/j.1471-4159.2003.01765.x
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
We established adrenal medullary cell lines from transgenic mice expressing an oncogene, the temperature-sensitive simian virus 40 large T-antigen, under the control of the tyrosine hydroxylase promoter. A clonal cell line, named tsAM5D, conditionally grew at a permissive temperature of 33degreesC and exhibited the dopaminergic chromaffin cell phenotype as exemplified by the expression pattern of mRNA for catecholamine-synthesizing enzymes and secretory vesicle-associated proteins. tsAM5D cells proliferated at the permissive temperature in response to basic fibroblast growth factor (bFGF) and ciliary neurotrophic factor (CNTF). At a non-permissive temperature of 39degreesC, bFGF and CNTF acted synergistically to differentiate tsAM5D cells into neuron-like cells. In addition, tsAM5D cells caused to differentiate by bFGF plus CNTF at 39degreesC became dependent solely on nerve growth factor for their survival and showed markedly enhanced neurite outgrowth. In the presence of bFGF and CNTF, the morphological change induced by the temperature shift was associated with up-regulated expression of neuronal marker genes including neuron-specific enolase, growth-associated protein-43, microtubule-associated protein 2, neurofilament, and p75 neurotrophin receptor, indicating that the cells underwent neuronal differentiation. Thus, we demonstrated that tsAM5D cells could proliferate at permissive 33degreesC, and also had the capacity to terminally differentiate into neuron-like cells in response to bFGF and CNTF when the oncogene was inactivated by shifting the temperature to non-permissive 39degreesC. These results suggest that tsAM5D cells should be a good tool to allow a detailed study of mechanisms regulating neuronal differentiation.
引用
收藏
页码:1126 / 1138
页数:13
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