Leukocyte telomere length associates with nasopharyngeal carcinoma risk and survival in Hong Kong Chinese.

Autor: Ko JM; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Tsang KH; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Dai W; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Choi SSA; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Leong MM; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Ngan RK; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Department of Clinical Oncology, Queen Elizabeth Hospital, Hong Kong (Special Administrative Region), People's Republic of China., Kwong DL; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Cheng A; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Department of Oncology, Princess Margaret Hospital, Hong Kong (Special Administrative Region), People's Republic of China., Lee AW; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Ng WT; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Department of Clinical Oncology, Pamela Youde Nethersole Eastern Hospital, Hong Kong (Special Administrative Region), People's Republic of China., Tung S; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Department of Clinical Oncology, Tuen Mun Hospital, Hong Kong (Special Administrative Region), People's Republic of China., Lee VH; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Lam KO; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Chan CK; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China., Lung ML; Department of Clinical Oncology, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.; Center for Nasopharyngeal Carcinoma Research, University of Hong Kong, Hong Kong (Special Administrative Region), People's Republic of China.
Jazyk: angličtina
Zdroj: International journal of cancer [Int J Cancer] 2018 Nov 01; Vol. 143 (9), pp. 2289-2298. Date of Electronic Publication: 2018 Aug 07.
DOI: 10.1002/ijc.31617
Abstrakt: Telomere shortening occurs as an early event in tumorigenesis. The TERT-CLPTM1L locus associates with nasopharyngeal carcinoma (NPC) risk. It remains unknown if leukocyte telomere length (LTL) associates with NPC risk and survival. The relative LTL (rLTL) was measured by quantitative-PCR in 2,996 individuals comprised of 1,284 NPC cases and 1712 matched controls. The odds ratio (OR) and 95% confidence intervals (CI) were calculated by logistic regression. The hazard ratio (HR) and 95% CI were calculated by Cox regression for survival analysis with rLTL and other clinical parameters in 1,243 NPC with a minimum follow-up period of 25 months. NPC patients had significantly shorter telomere length than controls. Shorter rLTL significantly associated with increased NPC risk, when the individuals were dichotomized into long and short telomeres based on median-split rLTL in the control group (OR = 2.317; 95% CI = 1.989-2.700, p = 4.10 × 10 -27 ). We observed a significant dose-response association (p trend  = 3.26 × 10 -34 ) between rLTL and NPC risk with OR being 3.555 (95% CI = 2.853-4.429) for the individuals in the first quartile (shortest) compared with normal individuals in the fourth quartile (longest). A multivariate Cox regression analysis adjusted by age demonstrated an independent effect of rLTL on NPC survival for late-stage NPC patients, when the individuals were categorized into suboptimal rLTL versus the medium rLTL based on a threshold set from normal (HR = 1.471, 95% CI = 1.056-2.048, p = 0.022). Shorter blood telomeres may be markers for higher susceptibility for NPC risk. Suboptimal rLTL may be a poor prognostic factor for advanced NPC patients, as it associates independently with poor survival.
(© 2018 UICC.)
Databáze: MEDLINE