Ibrahim E C, Morange M, Dausset J, Carosella E D, Paul P
CEA, Service de Recherches en Hémato-Immunologie, DSV/DRM, Hôpital Saint-Louis, Centre Hayem, Paris, France.
Cell Stress Chaperones. 2000 Jul;5(3):207-18. doi: 10.1379/1466-1268(2000)005<0207:hsaaie>2.0.co;2.
The nonclassical histocompatibility class I gene HLA-G has a tissue-restricted expression. To explore mechanisms involved in HLA-G transcriptional regulation, we have investigated the effect of stress, including heat shock and arsenite treatment, on HLA-G expression in tumor cell lines. We show that stress induces an increase of the level of the different HLA-G alternative transcripts without affecting other MHC class I HLA-A, -B, -E, and -F transcripts. A heat shock element (HSE) that binds to heat shock factor 1 (HSF1) on stress conditions was further identified within the HLA-G promoter. Considering the ability of HLA-G to modulate the function of immunocompetent cells, we hypothesize a new feature of HLA-G as a signal regulating the immune response to stress.
非经典组织相容性I类基因HLA-G具有组织限制性表达。为了探究参与HLA-G转录调控的机制,我们研究了应激(包括热休克和亚砷酸盐处理)对肿瘤细胞系中HLA-G表达的影响。我们发现应激可诱导不同HLA-G可变转录本水平升高,而不影响其他MHC I类基因HLA-A、-B、-E和-F的转录本。在HLA-G启动子内进一步鉴定出一个在应激条件下与热休克因子1(HSF1)结合的热休克元件(HSE)。鉴于HLA-G具有调节免疫活性细胞功能的能力,我们推测HLA-G具有作为调节对应激免疫反应的信号的新特性。