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在老年小鼠中,受损的肠细胞增殖与烧伤后衰老的增加平行
Travis M Walrath1, Mara R Evans1, Kenneth Meza Monge1
1Division of GI, Trauma and Endocrine Surgery, Department of Surgery, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States.
American journal of physiology. Gastrointestinal and liver physiology
|November 27, 2025
概括
老龄化人口面临着更高的烧伤伤害风险. 在老年小鼠中,烧伤损伤增加了结肠衰老和亡,同时减少了增殖和茎状,表明了潜在的非上皮细胞区间破坏.
科学领域:
- 老年学是一门学科.
- 胃肠病学 胃肠病学
- 烧伤伤害研究研究
背景情况:
- 全球人口正在老龄化,65岁及以上的人口显著增加.
- 老年人经历较高的发病率和死亡率后烧伤伤害.
- 与年龄相关的变化,如增加肠道泄漏和肠道细胞死亡,可能会导致老年烧伤患者的不良结果.
研究的目的:
- 为了研究燃烧损伤对结肠细胞生长,衰老和老鼠与年轻小鼠的亡的影响.
- 为了确定是否存在扩散,衰老和亡途径的缺陷,在燃烧后的老年人的结肠中存在.
主要方法:
- 在年轻和老年小鼠中使用了临床相关的伤伤损伤模型.
- 分析了结肠组织,分离的结肠表皮和结肠器官,以检测细胞生长,衰老和亡的标记.
- 检查了衰老标记CDKN2A,增殖标记CDK4,干细胞标记LGR5和抗菌 ANG4和CAMP的表达.
主要成果:
- 老年,受烧伤的小鼠在结肠和上皮中表现出衰老的增加 (CDKN2A) 和减少的增殖 (CDK4).
- 干细胞标志物LGR5在老年,烧伤的小鼠的结肠中减少,这表明表皮隐形干细胞功能受损.
- 在老年,受烧伤的小鼠结肠中观察到增加的亲断裂酶3和9,同时减少了抗菌ANG4的表达.
结论:
- 在老年小鼠中,烧伤损伤会扰乱结肠的增殖和亡,主要是在非上皮细胞区内.
- 在衰老的结肠中减少的干和抗微生物的表达在烧伤后可能有助于增加脆弱性.
- 研究结果突出了与年龄相关的结肠变化,这些变化因烧伤而加剧,这强调了对老年人有针对性的治疗的必要性.
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