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在黑色素瘤-2 (AIM2) 中缺失的删除驱动骨髓脂肪生成,并损害骨微型结构

Zhenwei Gong¹, Manisha Dixit², Zhiming He²

¹Division of Endocrinology and Diabetes, University of Pittsburgh School of Medicine, Children's Hospital of Pittsburgh, Pittsburgh, PA, 15224, USA.

|September 30, 2024

概括

在雌性小鼠中,AIM2基因被删除导致骨髓脂肪增加和骨密度降低. 这表明AIM2缺乏通过促进脂肪生成和炎症对骨健康产生负面影响.

科学领域:

免疫学免疫学免疫学
骨生物学骨生物学骨生物学
代谢健康代谢健康

背景情况:

缺席在黑色素瘤2 (AIM2) 是一个干扰素诱导的基因感知细胞质双链DNA.
AIM2形成了AIM2炎症酶,产生IL-1β和IL-18.
以前的研究将AIM2缺乏与肥胖,胰岛素抵抗和脂肪组织炎症联系在一起.

研究的目的:

为了研究AIM2基因删除对骨髓微环境的影响.
分析AIM2缺乏对成年和老年小鼠骨形态的影响.

主要方法:

微型计算机断层扫描 (微型CT) 用于骨形态和骨密度评估.
骨髓脂肪的组织学检查.
流细胞测量用于原始细胞分析.
骨髓的RNA测序 (RNAseq) 用于基因表达造型.

主要成果:

没有AIM2的雌性小鼠表现出增加的股骨皮层厚度和总横截面积.
皮层和椎骨矿物质密度 (BMD) 在老年女性AIM2-null中显著下降.
观察到骨髓脂肪度增加和原生细胞种群的改变 (更多的脂肪生成,少的骨质生成).
在AIM2-null骨髓中检测到干扰素刺激基因的升调,包括Ifi202b.

结论:

缺少AIM2会对雌性小鼠的骨健康产生负面影响.
这种影响的特点是骨髓质增加和促炎状态.
缺乏AIM2有助于骨矿物质密度下降,可能是通过骨髓微环境的改变.

关键词:

在AIM2中,AIM2是AIM2.骨头骨头骨头骨头骨髓骨髓骨髓骨髓骨髓在炎症中,一些细胞会发炎.干扰素干扰素干扰素

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