血管EC-SOD限制了缺氧时的间歇性巨细胞的积累,促炎性纤维细胞重编程和氨酸结合
Caitlin V Lewis1,2, Thi-Tina N Nguyen1,2, Timothy Porfilio1,2
1Cardiovascular Pulmonary Research Laboratories, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA.
概括
细胞外超氧化物脱酶 (EC-SOD) 通过减少巨细胞积累和炎症来限制肺高血压. 准EC-SOD可能会防止缺氧诱导的血管改造和疾病进展.
科学领域:
- 心血管研究研究心血管研究
- 肺部医学 肺部医学
- 转毒生物学 转毒生物学
背景情况:
- 不调节的氧化还原信号与肺高血压 (PH) 有关.
- 血管细胞外超氧化物失调酶 (EC-SOD) 缺乏会加剧缺血性PH.
- 巨细胞在PH病原发生过程中起着至关重要的作用.
研究的目的:
- 研究血管EC-SOD在调节间歇性巨细胞 (IMs) 的作用及其在慢性缺氧期间与氨酸 (HA) 的相互作用.
- 为了确定EC-SOD是否影响IM积累,表型和细胞外基质 (ECM) 改造以应对低氧.
主要方法:
- 在慢性缺氧PH模型中使用EC-SOD SMC淘汰赛小鼠和SOD模仿治疗.
- 采用流细胞计量来量化IM并评估其表型.
- 在排序的IM上进行RNA测序,以分析基因表达.
- 量化IM表示Lyve1和IM-hyaluronan结合.
主要成果:
- EC-SOD缺乏症加剧了缺氧诱导的IM积累,这被SOD模仿治疗阻止了.
- 通过EC-SOD模拟预处理,降低了PH严重性,右心室缩和血管重塑.
- 来自EC-SOD缺乏的小鼠的IM显示出基线前炎性激活和增强的ECM重塑通路.
- 缺氧增加了EC-SOD缺陷小鼠中的Lyve1+ IMs和Lyve1+/HA+ IMs,并带有周围血管积累.
结论:
- 血管EC-SOD限制了因低氧反应的间歇性巨细胞的积累和促炎性,益菌性信号传递.
- EC-SOD限制了Lyve1+ IMs在周围血管的积累以及它们与色素的结合.
- 针对血管EC-SOD可能是缓解缺氧诱导的肺高血压和血管改造的治疗策略.
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