Division of Gastroenterology and Hepatology, Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.
Department of Surgery, Louisiana State University Health Science Center, New Orleans, LA, USA.
J Investig Med. 2022 Aug;70(6):1438-1441. doi: 10.1136/jim-2021-002213. Epub 2022 Mar 4.
The intact telomere structure is essential for the prevention of the chromosome end-to-end fusions and maintaining genomic integrity. The maintenance of telomere length is critical for cellular homeostasis. The shortening of telomeres has been reported in patients with chronic liver diseases. The telomere length has not been systemically studied in patients with alcohol-associated liver disease (ALD) at different stages, such as alcoholic hepatitis and alcoholic cirrhosis. In this brief report, we observed evidence of telomere shortening without changes in the telomerase activity in the liver of patients with alcoholic hepatitis and alcoholic cirrhosis when compared with controls. The alterations in the genes associated with telomere binding proteins were only observed in patients with alcoholic cirrhosis. Future studies are required to determine the mechanism of how alcohol affects the length of the telomere and if the shortening impacts the disease progression in ALD.
完整的端粒结构对于防止染色体端-端融合和维持基因组完整性至关重要。端粒长度的维持对于细胞内稳态至关重要。已有报道称,慢性肝病患者的端粒长度会缩短。然而,在酒精性肝炎和酒精性肝硬化等不同阶段的酒精性肝病患者中,尚未对端粒长度进行系统研究。在本简要报告中,我们观察到与对照组相比,酒精性肝炎和酒精性肝硬化患者的肝组织中端粒缩短,而端粒酶活性没有变化。只有在酒精性肝硬化患者中才观察到与端粒结合蛋白相关的基因发生改变。需要进一步的研究来确定酒精如何影响端粒长度以及端粒缩短是否会影响酒精性肝病的疾病进展。