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. 2017 May;19(5):599-603.
doi: 10.1038/gim.2016.147. Epub 2016 Oct 6.

Genetic modifiers of CHEK2*1100delC-associated breast cancer risk

Taru A Muranen  1 Dario Greco  2 Carl Blomqvist  3 Kristiina Aittomäki  4 Sofia Khan  1 Frans Hogervorst  5 Senno Verhoef  5 Paul D P Pharoah  6   7 Alison M Dunning  6 Mitul Shah  6 Robert Luben  8 Stig E Bojesen  9   10   11 Børge G Nordestgaard  9   10   11 Minouk Schoemaker  12 Anthony Swerdlow  12   13 Montserrat García-Closas  12   14 Jonine Figueroa  14 Thilo Dörk  15 Natalia V Bogdanova  16 Per Hall  17 Jingmei Li  17 Elza Khusnutdinova  18   19 Marina Bermisheva  15   19 Vessela Kristensen  20   21   22 Anne-Lise Borresen-Dale  20   22 NBCS Investigators  20   21   22   23   24   25   26   27   28   29   30   31   32   33   34 Julian Peto  35 Isabel Dos Santos Silva  35 Fergus J Couch  36 Janet E Olson  37 Peter Hillemans  15 Tjoung-Won Park-Simon  15 Hiltrud Brauch  38   39   40 Ute Hamann  41 Barbara Burwinkel  42   43 Frederik Marme  43   44 Alfons Meindl  45 Rita K Schmutzler  46   47   48 Angela Cox  49 Simon S Cross  50 Elinor J Sawyer  51 Ian Tomlinson  52 Diether Lambrechts  53   54 Matthieu Moisse  53 Annika Lindblom  55 Sara Margolin  56 Antoinette Hollestelle  57 John W M Martens  57 Peter A Fasching  58   59 Matthias W Beckmann  58 Irene L Andrulis  60   61 Julia A Knight  62   63 kConFab/AOCS Investigators  64 Hoda Anton-Culver  65 Argyrios Ziogas  65 Graham G Giles  66   67 Roger L Milne  66   67 Hermann Brenner  38   68   69 Volker Arndt  69 Arto Mannermaa  70   71   72 Veli-Matti Kosma  70   71   72 Jenny Chang-Claude  73 Anja Rudolph  73 Peter Devilee  74   75 Caroline Seynaeve  57 John L Hopper  66 Melissa C Southey  76 Esther M John  77   78   79 Alice S Whittemore  78   79 Manjeet K Bolla  7 Qin Wang  7 Kyriaki Michailidou  7   80 Joe Dennis  7 Douglas F Easton  6   7 Marjanka K Schmidt  5 Heli Nevanlinna  1
Affiliations

Genetic modifiers of CHEK2*1100delC-associated breast cancer risk

Taru A Muranen et al. Genet Med. 2017 May.

Abstract

Purpose: CHEK2*1100delC is a founder variant in European populations that confers a two- to threefold increased risk of breast cancer (BC). Epidemiologic and family studies have suggested that the risk associated with CHEK2*1100delC is modified by other genetic factors in a multiplicative fashion. We have investigated this empirically using data from the Breast Cancer Association Consortium (BCAC).

Methods: Using genotype data from 39,139 (624 1100delC carriers) BC patients and 40,063 (224) healthy controls from 32 BCAC studies, we analyzed the combined risk effects of CHEK2*1100delC and 77 common variants in terms of a polygenic risk score (PRS) and pairwise interaction.

Results: The PRS conferred odds ratios (OR) of 1.59 (95% CI: 1.21-2.09) per standard deviation for BC for CHEK2*1100delC carriers and 1.58 (1.55-1.62) for noncarriers. No evidence of deviation from the multiplicative model was found. The OR for the highest quintile of the PRS was 2.03 (0.86-4.78) for CHEK2*1100delC carriers, placing them in the high risk category according to UK NICE guidelines. The OR for the lowest quintile was 0.52 (0.16-1.74), indicating a lifetime risk close to the population average.

Conclusion: Our results confirm the multiplicative nature of risk effects conferred by CHEK2*1100delC and the common susceptibility variants. Furthermore, the PRS could identify carriers at a high lifetime risk for clinical actions.Genet Med advance online publication 06 October 2016.

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Conflict of interest statement

CONFLICT OF INTEREST: The authors declare no conflict of interest. The funders had no role in conception and design of the study, nor in interpretation of the final results.

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