从小鼠巨细胞中克隆和表征可诱导的氧化合成酶
1Beatrice and Samuel A. Seaver Laboratory, Department of Medicine, Cornell University Medical College, New York, NY 10021.
Science (New York, N.Y.)
|April 10, 1992
概括
这项研究确定了两种氧化物 (NO) 合成酶异型在小鼠巨细胞中,与大脑酶不同. 巨细胞NO合成酶是由免疫信号诱导的,并且独立于运作.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 氧化 (NO) 是一个关键的信号分子,参与血管扩张,神经传递和细胞毒性.
- 内皮细胞和神经元中的构成性NO合成酶是依赖/calmodulin的.
- 巨细胞NO合成酶表现出不同的激活模式,独立于.
研究的目的:
- 从免疫激活的小鼠巨细胞中克隆和鉴定NO合成酶异型.
- 为了研究巨细胞NO合成酶和小脑NO合成酶之间的差异.
主要方法:
- 使用单个特异性抗体来克隆编码NO合成酶异型的互补DNA.
- 采用液体色谱-质谱测量来确认氨基酸序列.
主要成果:
- 从激活的小鼠巨细胞中成功克隆了两个NO合成酶异型.
- 巨细胞NO合成酶与小脑NO合成酶的显著差异.
- 巨细胞NO合成酶是由免疫刺激转录诱导的.
结论:
- 巨NO合成酶是一种独特的酶,与神经元异型不同,其调节方式不同.
- 巨酶与在细胞因子治疗的瘤细胞和中性粒细胞中发现的NO合成酶有相似之处.
- 这项研究阐明了免疫细胞中NO信号传递的分子基础.
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