BCR-ABL1 kinase inhibits uracil DNA glycosylase UNG2 to enhance oxidative DNA damage and stimulate genomic instability.
BCR-ABL1 kinase inhibits uracil DNA glycosylase UNG2 to enhance oxidative DNA damage and stimulate genomic instability.
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DOI:
10.1038/leu.2012.294
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发表时间:
2013-03
期刊:
影响因子:
11.4
通讯作者:
Skorski, T.
中科院分区:
文献类型:
--
作者:
Slupianek, A.;Falinski, R.;Znojek, P.;Stoklosa, T.;Flis, S.;Doneddu, V.;Pytel, D.;Synowiec, E.;Blasiak, J.;Bellacosa, A.;Skorski, T.
Tyrosine kinase inhibitors (TKIs) revolutionized the treatment of CML-CP. Unfortunately, 25% of TKI-naive patients and 50–90% of TKI-responding patients carry CML clones expressing TKI resistant BCR-ABL1 kinase mutants. We reported that CML-CP leukemia stem and progenitor cell populations accumulate high amounts of reactive oxygen species (ROS), which may result in accumulation of uracil derivatives in genomic DNA. Unfaithful and/or inefficient repair of these lesions generates TKI resistant point mutations in BCR-ABL1 kinase. Using an array of specific substrates and inhibitors/blocking antibodies we found that uracil-DNA glycosylase UNG2 were inhibited in BCR-ABL1 –transformed cell lines and CD34+ CML cells. The inhibitory effect was not accompanied by downregulation of nuclear expression and/or chromatin association of UNG2. The effect was BCR-ABL1 kinase-specific because several other fusion tyrosine kinases did not reduce UNG2 activity. Using UNG2-specific inhibitor UGI we found that reduction of UNG2 activity increased the number of uracil derivatives in genomic DNA detected by modified comet assay and facilitated accumulation of ouabain-resistant point mutations in reporter gene Na+/K+ATPase. In conclusion, we postulate that BCR-ABL1 kinase-mediated inhibition of UNG2 contributes to accumulation of point mutations responsible for TKI-resistance causing the disease relapse, and perhaps also other point mutations facilitating malignant progression of CML.
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DOI:
10.1016/s1383-5718(02)00289-9
发表时间:
2003-02-05
影响因子:
1.9
作者:
Blasiak, J;Gloc, E;Pertynski, T
通讯作者:
Pertynski, T
影响因子:
12.8
作者:
Foroni, Letizia;Gerrard, Gareth;Marin, David
通讯作者:
Marin, David
影响因子:
11.2
作者:
Eide CA;Adrian LT;Tyner JW;Mac Partlin M;Anderson DJ;Wise SC;Smith BD;Petillo PA;Flynn DL;Deininger MW;O'Hare T;Druker BJ
通讯作者:
Druker BJ
影响因子:
14.9
作者:
Dizdaroglu, M;Karakaya, A;Krokan, HE
通讯作者:
Krokan, HE
影响因子:
4.8
作者:
Hazra, TK;Kow, YW;Izumi, T
通讯作者:
Izumi, T