Faust Hilary E, Golden Jeffrey A, Rajalingam Raja, Wang Angelia S, Green Gary, Hays Steven R, Kukreja Jasleen, Singer Jonathan P, Wolters Paul J, Greenland John R
Pulmonary, Allergy and Critical Care Division, Perelman School of Medicine, Philadelphia, Pennsylvania, USA.
University of California, San Francisco, California, USA.
Thorax. 2017 Nov;72(11):1052-1054. doi: 10.1136/thoraxjnl-2016-209897. Epub 2017 Apr 26.
Telomere length (TL) decreases with cellular ageing and biological stressors. As advanced donor and recipient ages are risk factors for chronic lung allograft dysfunction (CLAD), we hypothesised that decreased age-adjusted donor TL would predict earlier onset of CLAD. Shorter donor TL was associated with increased risk of CLAD or death (HR 1.26 per 1 kb TL decrease, 95% CI 1.03 to 1.54), particularly for young donors. Recipient TL was associated with cytopenias but not CLAD. Shorter TL was also seen in airway epithelium for subjects progressing to CLAD (p=0.02). Allograft TL may contribute to CLAD pathogenesis and facilitate risk stratification.
端粒长度(TL)会随着细胞衰老和生物应激因素而缩短。由于供体和受体年龄较大是慢性肺移植功能障碍(CLAD)的危险因素,我们推测年龄校正后的供体TL降低会预示CLAD更早发病。供体TL较短与CLAD或死亡风险增加相关(每1 kb TL降低的风险比为1.26,95%置信区间为1.03至1.54),尤其是对于年轻供体。受体TL与血细胞减少有关,但与CLAD无关。在进展为CLAD的受试者的气道上皮中也观察到较短的TL(p=0.02)。同种异体移植的TL可能有助于CLAD的发病机制,并有助于进行风险分层。