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. 2016 May;53(5):298-309.
doi: 10.1136/jmedgenet-2015-103529. Epub 2016 Feb 26.

No evidence that protein truncating variants in BRIP1 are associated with breast cancer risk: implications for gene panel testing

Douglas F Easton  1 Fabienne Lesueur  2 Brennan Decker  3 Kyriaki Michailidou  4 Jun Li  5 Jamie Allen  6 Craig Luccarini  7 Karen A Pooley  6 Mitul Shah  7 Manjeet K Bolla  6 Qin Wang  6 Joe Dennis  6 Jamil Ahmad  8 Ella R Thompson  9 Francesca Damiola  10 Maroulio Pertesi  8 Catherine Voegele  8 Noura Mebirouk  2 Nivonirina Robinot  8 Geoffroy Durand  8 Nathalie Forey  8 Robert N Luben  11 Shahana Ahmed  7 Kristiina Aittomäki  12 Hoda Anton-Culver  13 Volker Arndt  14 Australian Ovarian Cancer Study GroupCaroline Baynes  7 Matthias W Beckman  15 Javier Benitez  16 David Van Den Berg  17 William J Blot  18 Natalia V Bogdanova  19 Stig E Bojesen  20 Hermann Brenner  21 Jenny Chang-Claude  22 Kee Seng Chia  23 Ji-Yeob Choi  24 Don M Conroy  7 Angela Cox  25 Simon S Cross  26 Kamila Czene  27 Hatef Darabi  27 Peter Devilee  28 Mikael Eriksson  27 Peter A Fasching  29 Jonine Figueroa  30 Henrik Flyger  31 Florentia Fostira  32 Montserrat García-Closas  33 Graham G Giles  34 Gord Glendon  35 Anna González-Neira  36 Pascal Guénel  37 Christopher A Haiman  17 Per Hall  27 Steven N Hart  38 Mikael Hartman  39 Maartje J Hooning  40 Chia-Ni Hsiung  41 Hidemi Ito  42 Anna Jakubowska  43 Paul A James  44 Esther M John  45 Nichola Johnson  46 Michael Jones  47 Maria Kabisch  48 Daehee Kang  49 kConFab InvestigatorsVeli-Matti Kosma  50 Vessela Kristensen  51 Diether Lambrechts  52 Na Li  53 Lifepool InvestigatorsAnnika Lindblom  54 Jirong Long  55 Artitaya Lophatananon  56 Jan Lubinski  43 Arto Mannermaa  50 Siranoush Manoukian  57 Sara Margolin  58 Keitaro Matsuo  59 Alfons Meindl  60 Gillian Mitchell  61 Kenneth Muir  62 NBCS InvestigatorsInes Nevelsteen  63 Ans van den Ouweland  64 Paolo Peterlongo  65 Sze Yee Phuah  66 Katri Pylkäs  67 Simone M Rowley  68 Suleeporn Sangrajrang  69 Rita K Schmutzler  70 Chen-Yang Shen  71 Xiao-Ou Shu  72 Melissa C Southey  73 Harald Surowy  74 Anthony Swerdlow  75 Soo H Teo  66 Rob A E M Tollenaar  76 Ian Tomlinson  77 Diana Torres  78 Thérèse Truong  37 Celine Vachon  38 Senno Verhoef  79 Michelle Wong-Brown  80 Wei Zheng  55 Ying Zheng  81 Heli Nevanlinna  82 Rodney J Scott  83 Irene L Andrulis  84 Anna H Wu  17 John L Hopper  85 Fergus J Couch  86 Robert Winqvist  67 Barbara Burwinkel  74 Elinor J Sawyer  87 Marjanka K Schmidt  79 Anja Rudolph  88 Thilo Dörk  89 Hiltrud Brauch  90 Ute Hamann  48 Susan L Neuhausen  91 Roger L Milne  34 Olivia Fletcher  46 Paul D P Pharoah  1 Ian G Campbell  92 Alison M Dunning  7 Florence Le Calvez-Kelm  8 David E Goldgar  93 Sean V Tavtigian  94 Georgia Chenevix-Trench  5
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No evidence that protein truncating variants in BRIP1 are associated with breast cancer risk: implications for gene panel testing

Douglas F Easton et al. J Med Genet. 2016 May.

Abstract

Background: BRCA1 interacting protein C-terminal helicase 1 (BRIP1) is one of the Fanconi Anaemia Complementation (FANC) group family of DNA repair proteins. Biallelic mutations in BRIP1 are responsible for FANC group J, and previous studies have also suggested that rare protein truncating variants in BRIP1 are associated with an increased risk of breast cancer. These studies have led to inclusion of BRIP1 on targeted sequencing panels for breast cancer risk prediction.

Methods: We evaluated a truncating variant, p.Arg798Ter (rs137852986), and 10 missense variants of BRIP1, in 48 144 cases and 43 607 controls of European origin, drawn from 41 studies participating in the Breast Cancer Association Consortium (BCAC). Additionally, we sequenced the coding regions of BRIP1 in 13 213 cases and 5242 controls from the UK, 1313 cases and 1123 controls from three population-based studies as part of the Breast Cancer Family Registry, and 1853 familial cases and 2001 controls from Australia.

Results: The rare truncating allele of rs137852986 was observed in 23 cases and 18 controls in Europeans in BCAC (OR 1.09, 95% CI 0.58 to 2.03, p=0.79). Truncating variants were found in the sequencing studies in 34 cases (0.21%) and 19 controls (0.23%) (combined OR 0.90, 95% CI 0.48 to 1.70, p=0.75).

Conclusions: These results suggest that truncating variants in BRIP1, and in particular p.Arg798Ter, are not associated with a substantial increase in breast cancer risk. Such observations have important implications for the reporting of results from breast cancer screening panels.

Keywords: Cancer: breast.

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Conflict of interest statement

Competing interests

GM reports grants from Cancer Australia during the conduct of the study; personal fees from AstraZeneca outside the submitted work. AS reports grants from Breast Cancer Now (previously Breakthrough Breast Cancer) during the conduct of the study. SVT reports grants from US National Cancer Institute during the conduct of the study and is an inventor on most of the key BRCA1 and BRCA2 patents. The claims in these patents that constrained commercial genetic testing by entities other than Myriad Genetics have been overturned, expired or abandoned. MWB reports grants from ELAN Found during the conduct of the study. DEG has US Patent nos. 5747282; 5710001; 5837942; 6033857 with royalties paid by Myriad Genetics. CV reports grants from NCI during the conduct of the study. PAF reports grants and/or personal fees from Amgen, Novartis, Biomarin, Roche, Pfizer, GSK, TEVA and Genomic Health, outside the submitted work. RNL reports grants from Medical Research Council and Cancer Research UK during the conduct of the study.

Figures

Figure 1
Figure 1
Cluster plot for genotype intensities for rs137852986 on the iCOGS array. Normalised intensities for the variant and wild-type allele for each individual are given by the X and Y coordinates, respectively. Individuals called as p.Arg798Ter carriers are indicated by green dots and non-carriers by blue dots. The red dot indicates a positive control individual known to carry the variant from prior sequencing. BCAC, Breast Cancer Association Consortium; NC, no call.
Figure 2
Figure 2
Sequencing of cDNA from a cycloheximide-treated and untreated lymphoblastoid cell line from a BRIP1 p.Arg798Ter carrier. Forward sequence of (A) cDNA from cycloheximide-treated lymphoblastoid cell line, (B) cDNA from the untreated lymphoblastoid cell line and (C) DNA sequence from the same cell line.

Comment in

  • Risky business: getting a grip on BRIP.
    Sopik V, Foulkes WD. Sopik V, et al. J Med Genet. 2016 May;53(5):296-7. doi: 10.1136/jmedgenet-2015-103648. Epub 2016 Feb 26. J Med Genet. 2016. PMID: 26921361 No abstract available.

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