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Träfflista för sökning "WFRF:(Krokan Hans E.) srt2:(2010-2014)"

Sökning: WFRF:(Krokan Hans E.) > (2010-2014)

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1.
  • Wang, Yufei, et al. (författare)
  • Rare variants of large effect in BRCA2 and CHEK2 affect risk of lung cancer
  • 2014
  • Ingår i: Nature Genetics. - : Springer Science and Business Media LLC. - 1061-4036 .- 1546-1718. ; 46:7, s. 736-741
  • Tidskriftsartikel (refereegranskat)abstract
    • We conducted imputation to the 1000 Genomes Project of four genome-wide association studies of lung cancer in populations of European ancestry (11,348 cases and 15,861 controls) and genotyped an additional 10,246 cases and 38,295 controls for follow-up. We identified large-effect genome-wide associations for squamous lung cancer with the rare variants BRCA2 p.Lys3326X (rs11571833, odds ratio (OR) = 2.47, P = 4.74 x 10(-20)) and CHEK2 p.Ile157Thr (rs17879961, OR = 0.38, P = 1.27 x 10(-13)). We also showed an association between common variation at 3q28 (TP63, rs13314271, OR = 1.13, P = 7.22 x 10(-10)) and lung adenocarcinoma that had been previously reported only in Asians. These findings provide further evidence for inherited genetic susceptibility to lung cancer and its biological basis. Additionally, our analysis demonstrates that imputation can identify rare disease-causing variants with substantive effects on cancer risk from preexisting genome-wide association study data.
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2.
  • Wallenius, Anders, et al. (författare)
  • Expression and recruitment of uracil-DNA glycosylase are regulated by E2A during antibody diversification
  • 2014
  • Ingår i: Molecular Immunology. - : Elsevier BV. - 0161-5890 .- 1872-9142. ; 60:1, s. 23-31
  • Tidskriftsartikel (refereegranskat)abstract
    • B-lymphocytes can modify their immunoglobulin (Ig) genes to generate specific antibodies with a new isotype and enhanced affinity against an antigen. Activation-induced cytidine deaminase (AID), which is positively regulated by the transcription factor E2A, is the key enzyme that initiates these processes by deaminating cytosine to uracil in Ig genes. Nuclear uracil-DNA glycosylase (UNG2) is subsequently required for uracil processing in the generation of high affinity antibodies of different isotypes. Here we show that the transcription factor E2A binds to the UNG2 promoter and represses UNG2 expression. Inhibition of E2A by binding of Ca2+-activated calmodulin alleviates this repression. Furthermore, we demonstrate that UNG2 preferentially accumulates in regions of the Ig heavy chain (IgH) gene containing AID hotspots. Calmodulin inhibition of E2A strongly enhances this UNG2 accumulation, indicating that it is negatively regulated by E2A as well. We show also that over-expression of E2A can suppress class switch recombination. The results suggest that E2A is a key factor in regulating the balance between AID and UNG2, both at expression and Ig targeting levels, to stimulate Ig diversification and suppress normal DNA repair processes. (c) 2014 Elsevier Ltd. All rights reserved.
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