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肝细胞铁代谢的差异是肝细胞铁亡中的性变态的基础

Hui Tao¹, Hamid Y Dar², Cheng Tian³

¹Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA.

|September 23, 2023

概括

男性肝细胞比女性更容易受到铁亡 (铁媒介细胞死亡) 的影响,这是由于铁处理的差异. 铁亡中的这种性二态化有助于造成肝脏疾病的差异.

科学领域:

肝病学肝病学是一种肝病学.
细胞生物学细胞生物学
生物化学生化学

背景情况:

与女性相比,男性的肝损伤和肝病的发病率和严重程度更高.
铁,一种由铁和脂质过氧化驱动的受调细胞死亡形式,与肝脏疾病的发病有关.
肝脏疾病性变态的潜在机制尚不清楚.

研究的目的:

为了研究肝细胞铁死中的潜在性别差异.
阐明肝细胞铁处理在肝脏疾病中观察到的基于性别的差异中的作用.

主要方法:

对雄性和雌性肝细胞对铁灭诱导剂 (铁,RSL3,iFSP1) 的脆弱性的比较分析.
评估线粒体铁 (Fe2+) 和活性氧物种 (mtROS) 的水平.
对铁相关蛋白质 (TfR1,Mfrn1,FTH1) 和FSP1.1的基因表达分析.
在女性卵巢切除 (OVX) 模型中,研究激素去除对铁灭抵抗的影响.

主要成果:

男性肝细胞表现出明显更高的脆弱性比女性肝细胞的ferroptosis.
男性肝细胞显示线粒体Fe2+和mtROS积累增加.
女性肝细胞表现出较低的TfR1和Mfrn1表达,以及更高的FTH1表达.
卵巢切除增强了肝细胞对铁亡的抵抗力,与TfR1降低,FTH1增加和通过ERK依赖途径提高FSP1表达相关.

结论:

肝细胞铁处理机制在雄性和雌性之间有所不同,这有助于ferroptosis中的性二态.
雌激素禁用通过调节铁代谢和FSP1表达来增强铁灭的抵抗力.
这些发现提供了关于肝脏疾病发病过程中基于性别的差异的见解.

关键词:

抗氧化剂防御的抗氧化剂防御 FSP1SP1 在线播放 FTH1 FTH1 是一个美国的Mfrn1 线粒体的ROS是什么?进行卵巢切除术.

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