Homologous and heterologous desensitization of proto‐oncogene cfos expression in murine peritoneal macrophages

Homologous and heterologous desensitization of proto‐oncogene cfos expression in murine peritoneal macrophages
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小鼠腹腔巨噬细胞原癌基因cfos表达的同源和异源脱敏

DOI:
10.1002/jcp.1041310107
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发表时间:
1987
影响因子:
5.6
通讯作者:
T. Hamilton
T. Hamilton
中科院分区:
生物学2区
文献类型:
--
作者:
M. Introna;R. Bast;P. Johnston;D. Adams;T. Hamilton

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用脂多糖(LPS)处理鼠腹膜巨噬细胞30分钟导致c-fos原癌基因mRNA水平的瞬时增加(Introna等人,1986年)。在初始处理2小时后,c-fos mRNA不再被检测到,并且其表达不能被LPS或其他信号(包括集落刺激因子-1(CSF-1)和佛波醇肉豆蔻酸酯乙酸酯(PMA))再刺激,这两种信号都能够在未刺激的巨噬细胞中诱导c-fos基因的表达。当在初始30 min孵育后去除LPS时,对第二次暴露于LPS的反应性在3 h后开始重新出现,并在20 h时完全恢复。当CSF-1刺激的巨噬细胞随后暴露于LPS时,观察到c-fos诱导的相同脱敏模式。用LPS预处理后对PMA敏感性的丧失对于c-fos表达是选择性的,因为LPS处理的巨噬细胞在刺激H2 O2分泌的能力方面仍然对PMA有反应。脱敏机制至少部分地定位于转录水平,如通过分析从用LPS预处理和再刺激的巨噬细胞分离的细胞核中的c-fos转录物所证明的。
Treatment of murine peritoneal macrophages for 30 min with lipopolysaccharide (LPS) resulted in a transient increase in c‐fos proto‐oncogene mRNA levels (Introna et al., 1986). After 2 h from the initial treatment, c‐fos mRNA could no longer be detected and its expression could not be restimulated either by LPS or by other signals including colony stimulating factor‐1 (CSF‐1) and phorbol myristate acetate (PMA), both of which are able to induce expression of the c‐fos gene in unstimulated macrophages. When LPS was removed after an initial 30 min incubation, responsiveness to a second exposure to LPS began to reappear after 3 h and was completely restored by 20 h. The same pattern of desensitization of c‐fos induction was observed when CSF‐1 stimulated macrophages were subsequently exposed to LPS. The loss of sensitivity to PMA following pretreatment with LPS was selective for c‐fos expression as LPS treated macrophages remained responsive to PMA with respect to the ability to stimulate secretion of H2O2. The mechanism of desensitization was localized, at least in part, at the level of transcription as demonstrated by analysis of c‐fos transcripts in nuclei isolated from macrophages pretreated and restimulated with LPS.
干扰素-γ 调节小鼠腹膜巨噬细胞中的蛋白激酶 C 活性。
DOI: --
发表时间: 1985
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影响因子: --
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发表时间: 1984
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发表时间: 1986
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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激活的鼠巨噬细胞响应佛波醇肉豆蔻酸酯乙酸酯,增强选择性肿瘤细胞结合。
DOI: --
发表时间: 1986
期刊: Journal of immunology (Baltimore, Md. : 1950)
影响因子: --
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DOI: 10.4049/jimmunol.137.8.2711
发表时间: 1986-10
影响因子: 4.4
作者:
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通讯作者: M. Introna;T. Hamilton;R. Kaufman;D. Adams;R. Bast