Article (Scientific journals)
Differential involvement of the hMRE11/hRAD50/NBS1 complex, BRCA1 and MLH1 in NF-kappa B activation by camptothecin and X-ray
Habraken, Yvette; Jolois, Olivier; Piette, Jacques
2003In Oncogene, 22 (38), p. 6090-6099
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Keywords :
NF-kappa B; double-strand breaks; BRCA1; NBS; ATLD; MMR
Abstract :
[en] Camptothecin (CPT) and X-ray (XR) generate double-strand breaks (DSB) that can be processed by homologous or nonhomologous recombination. We studied the participation of proteins involved in recombination pathways and cell cycle control in the signal transduction between DNA damage and NF-kappaB. Cells harbouring mutated NBS, hMRE11, BRCA1 or MLH1 were analysed. NBS- and hMRE11-deficient cells present a classical kinetic of NF-kappaB induction after camptothecin treatment. When DSB are generated by XR, NBS-deficient cells exhibit a delayed and strongly reduced level of NF-kappaB induction, whereas the hMRE11 mutated cells do not induce NF-kappaB at all. This indicates an important role of the hMRE11/hRAD50/NBS complex in the signal transduction initiated by XR. In HCC1937 cells that express a truncated version of BRCA1, XR induces a very rapid and transient NF-kappaB activation, whereas CPT leads to a delayed activation suggesting that BRCA1 modulates the transduction pathways in different manners after these two stresses. Finally, we found that a proficient MMR pathway is essential to the NF-kappaB activation after both CPT and XR. These results indicate that DSB originating from XR or CPT do not induce NF-kappaB in a unique way. MMR participates in both cascades, whereas the hMRE11/hRAD50/NBS trimer is specifically involved in the response elicited by XR.
Research center :
Giga-Signal Transduction - ULiège
Disciplines :
Oncology
Biochemistry, biophysics & molecular biology
Author, co-author :
Habraken, Yvette ;  Université de Liège - ULiège > Virologie - Immunologie
Jolois, Olivier ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Histologie humaine
Piette, Jacques ;  Université de Liège - ULiège > Département des sciences de la vie > Virologie - Immunologie
Language :
English
Title :
Differential involvement of the hMRE11/hRAD50/NBS1 complex, BRCA1 and MLH1 in NF-kappa B activation by camptothecin and X-ray
Publication date :
04 September 2003
Journal title :
Oncogene
ISSN :
0950-9232
eISSN :
1476-5594
Publisher :
Nature Publishing Group, London, United Kingdom
Volume :
22
Issue :
38
Pages :
6090-6099
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
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