Please use this identifier to cite or link to this item: https://observatorio.fm.usp.br/handle/OPI/34085
Title: Mendelian Randomization and mediation analysis of leukocyte telomere length and risk of lung and head and neck cancers
Authors: KACHURI, LindaSAARELA, OlliBOJESEN, Stig EgilSMITH, George DaveyLIU, GeoffreyLANDI, Maria TeresaCAPORASO, Neil E.CHRISTIANI, David C.JOHANSSON, MattiasPANICO, SalvatoreOVERVAD, KimTRICHOPOULOU, AntoniaVINEIS, PaoloSCELO, GhislaineZARIDZE, DavidWU, XifengALBANES, DemetriusDIERGAARDE, BrendaLAGIOU, PagonaMACFARLANE, Gary J.ALDRICH, Melinda C.TARDON, AdoninaRENNERT, GadOLSHAN, Andrew F.WEISSLER, Mark C.CHEN, ChuGOODMAN, Gary E.DOHERTY, Jennifer A.NESS, Andrew R.BICKEBOELLER, HeikeWICHMANN, H-ErichRISCH, AngelaFIELD, John K.TEARE, M. DawnKIEMENEY, Lambertus A.HEIJDEN, Erik H. F. M. van derCARROLL, June C.HAUGEN, AageZIENOLDDINY, ShanbehSKAUG, VidarWUNSCH-FILHO, VictorTAJARA, Eloiza H.MOYSES, Raquel AyoubNUNES, Fabio DaumasLAM, StephenELUF-NETO, JoseLACKO, MartinPETERS, Wilbert H. M.MARCHAND, Loic LeDUELL, Eric J.ANDREW, Angeline S.FRANCESCHI, SilviaSCHABATH, Matthew B.MANJER, JonasARNOLD, SusanneLAZARUS, PhilipMUKERIYA, AnushSWIATKOWSKA, BeataJANOUT, VladimirHOLCATOVA, IvanaSTOJSIC, JelenaMATES, DanaLISSOWSKA, JolantaBOCCIA, StefaniaLESSEUR, CorinaZONG, XuchenMCKAY, James D.BRENNAN, PaulAMOS, Christopher I.HUNG, Rayjean J.
Citation: INTERNATIONAL JOURNAL OF EPIDEMIOLOGY, v.48, n.3, p.751-766, 2019
Abstract: Background: Evidence from observational studies of telomere length (TL) has been conflicting regarding its direction of association with cancer risk. We investigated the causal relevance of TL for lung and head and neck cancers using Mendelian Randomization (MR) and mediation analyses. Methods: We developed a novel genetic instrument for TL in chromosome 5p15.33, using variants identified through deep-sequencing, that were genotyped in 2051 cancer-free subjects. Next, we conducted an MR analysis of lung (16 396 cases, 13 013 controls) and head and neck cancer (4415 cases, 5013 controls) using eight genetic instruments for TL. Lastly, the 5p15.33 instrument and distinct 5p15.33 lung cancer risk loci were evaluated using two-sample mediation analysis, to quantify their direct and indirect, telomere-mediated, effects. Results: The multi-allelic 5p15.33 instrument explained 1.49-2.00% of TL variation in our data (p = 2.6 x 10(-9)). The MR analysis estimated that a 1000 base-pair increase in TL increases risk of lung cancer [odds ratio (OR) = 1.41, 95% confidence interval (CI): 1.20-1.65] and lung adenocarcinoma (OR = 1.92, 95% CI: 1.51-2.22), but not squamous lung carcinoma (OR = 1.04, 95% CI: 0.83-1.29) or head and neck cancers (OR = 0.90, 95% CI: 0.70-1.05). Mediation analysis of the 5p15.33 instrument indicated an absence of direct effects on lung cancer risk (OR = 1.00, 95% CI: 0.95-1.04). Analysis of distinct 5p15.33 susceptibility variants estimated that TL mediates up to 40% of the observed associations with lung cancer risk. Conclusions: Our findings support a causal role for long telomeres in lung cancer aetiology, particularly for adenocarcinoma, and demonstrate that telomere maintenance partially mediates the lung cancer susceptibility conferred by 5p15.33 loci.
Appears in Collections:

Artigos e Materiais de Revistas Científicas - FM/MPR
Departamento de Medicina Preventiva - FM/MPR

Artigos e Materiais de Revistas Científicas - HC/ICHC
Instituto Central - HC/ICHC

Artigos e Materiais de Revistas Científicas - LIM/28
LIM/28 - Laboratório de Cirurgia Vascular e da Cabeça e Pescoço

Artigos e Materiais de Revistas Científicas - LIM/38
LIM/38 - Laboratório de Epidemiologia e Imunobiologia


Files in This Item:
File Description SizeFormat 
art_KACHURI_Mendelian_Randomization_and_mediation_analysis_of_leukocyte_telomere_2019.PDF
  Restricted Access
publishedVersion (English)801.96 kBAdobe PDFView/Open Request a copy

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.