Neurotrophic requirements of rat embryonic catecholaminergic neurons from the rostral ventrolateral medulla

被引:3
作者
Copray, JCVM
Bastiaansen, M
Gibbons, H
van Roon, WMC
Comer, AM
Lipski, J
机构
[1] Univ Auckland, Fac Med & Hlth Sci, Dept Physiol, Auckland 1, New Zealand
[2] Univ Groningen, Dept Med Physiol, Groningen, Netherlands
[3] Univ Auckland, Dept Anat, Auckland 1, New Zealand
来源
DEVELOPMENTAL BRAIN RESEARCH | 1999年 / 116卷 / 02期
关键词
catecholamine; neurotrophin; neurotrophic factor; tyrosine hydroxylase; phenylethanolamine N-methyltransferase; immunocytochemistry; reverse transcription polymerase chain reaction;
D O I
10.1016/S0165-3806(99)00085-1
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The factors that regulate the ontogeny and differentiation of C1 adrenergic neurons located in the rostral ventrolateral medulla (RVLM) are completely unknown. In the present study, we have investigated the effects of a number of neurotrophic factors on the survival of E18-19 rat C1 adrenergic neurons in culture. Immunohistochemistry and reverse transcription polymerase chain reaction (RT-PCR) were used to study the expression of tyrosine hydroxylase (TH), an enzyme present in all catecholaminergic neurons, and of phenylethanolamine N-methyltransferase (PNMT), the final enzyme in the synthesis of adrenalin, as markers for the C1 RVLM neurons. Our results show that GDNF, CNTF BDNF, NT-3 and NT-4/5 increase the number of TH-immunoreactive neurons surviving in vitro. The effects of NGF, TGF beta and bFGF were not significant. The E18-19 CI neurons appeared to loose their ability to express PNMT in culture as examined with immunocytochemistry and RT-PCR, and none of the tested neurotrophic factors was able to sustain or induce this expression. Our results indicate that the adrenergic phenotype of C1 neurons, or the survival of these neurons, is determined by environmental factors other than the neurotrophic factors examined in this study. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:217 / 222
页数:6
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