由低氧状态诱导的HIF-1α调节了慢性免疫血栓塞缩症中Treg/Th17轴的两极化
Hao Gu1, Zhifa Wang2, Xingjuan Xie3
1Hematologic Disease Laboratory, Beijing Key Laboratory of Pediatric Hematology Oncology, National Key Discipline of Pediatrics (Capital Medical University), Beijing Pediatric Research Institute, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China 100045; Department of Immunology, Ministry of Education Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, China 100045.
缺氧诱导因子-1α (HIF-1α) 通过破坏Treg/Th17平衡,影响免疫血小板缺血 (ITP),从而导致疾病慢性化. 这项研究揭示了HIF-1α.
科学领域:
- 免疫学 免疫学 免疫学
- 病理生理学 病理生理学
- 分子生物学分子生物学
背景情况:
- 免疫性血小板缺血 (ITP) 是一种自身免疫性疾病,涉及血小板的破坏和减少的生产.
- 缺氧诱导因子-1α (HIF-1α) 涉及免疫调节,可能在ITP病变发生中发挥作用.
- 调节性T细胞 (Treg) 和T助手17 (Th17) 细胞的平衡在免疫恒温中至关重要.
研究的目的:
- 研究HIF-1α在新诊断的ITP (NITP) 和慢性ITP (CITP) 患者的Treg/Th17轴平衡中的作用.
- 探索ITP中HIF-1α水平与Treg/Th17比率之间的相关性.
- 阐明低氧对Treg/Th17轴在NITP和CITP中的体外影响.
主要方法:
- 在NITP和CITP患者中量化Treg/Th17细胞比率,血清水平和基因表达.
- 在Treg/Th17比率和HIF-1α水平 (mRNA和血清) 之间的相关性分析.
- 在NITP和CITP样本中在低氧条件下评估Treg/Th17细胞偏振的体外实验.
主要成果:
- 与对照组相比,在CITP患者中观察到Treg/Th17比率显著下降 (P = 0.001).
- 特雷格/Th17比率与HIF-1α水平有很强的正相关性 (mRNA:r = 0.49,P < 0.0001;血清:r = 0.50,P < 0.0001).
- 在体外研究表明,在NITP和CITP组之间,Treg/Th17轴极化和在低氧条件下Foxp3/IL17表达的显著差异 (分别P=0.042和P=0.0003).
结论:
- 缺氧诱导的HIF-1α在ITP的慢性化中起着至关重要的作用.
- HIF-1α调解Treg/Th17轴的不平衡,有助于ITP的进展.
- 准HIF-1α或调节Treg/Th17轴可能为慢性ITP提供治疗策略.
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