dc.creatorPincheira, Juana
dc.creatorRomero, Pablo
dc.creatorMarcelain Cubillos, Katherine
dc.creatorSalazar, Lorena
dc.creatorde la Torre, Consuelo
dc.date.accessioned2019-03-11T12:53:18Z
dc.date.available2019-03-11T12:53:18Z
dc.date.created2019-03-11T12:53:18Z
dc.date.issued2007
dc.identifierCell Biology International, Volumen 31, Issue 2, 2018, Pages 135-140
dc.identifier10656995
dc.identifier10.1016/j.cellbi.2006.09.018
dc.identifierhttps://repositorio.uchile.cl/handle/2250/164268
dc.description.abstractThe amount of DNA lesions repaired in G2 and also G2 timing are controlled by the DNA damage-dependent checkpoint. Down syndrome (DS) lymphocytes showed twice as much constitutive DNA damage in G2 than control ones, when recording it as chromosomal aberrations in metaphase, after caffeine-induced checkpoint abrogation. During G2, DS lymphocytes repaired 1.5 times more DNA lesions than control ones. However the DS cells displayed a decreased threshold for checkpoint adaptation, as the spontaneous override of the G2 to mitosis transition block induced by the checkpoint took place in the DS cells when they had three times more DNA lesions than controls. Catalase addition to cultures scavenges hydrogen peroxide diffused from cells, resulting in subsequent intracellular depletion (Antunes and Cadenas, 2000). The intracellular H2O2 level seemed to regulate the G2 checkpoint. Thus, in controls, H2O2 depletion (induced by 3.2-50 μg/mL catalase) prevented its functioning: chromosomal damage inc
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile
dc.sourceCell Biology International
dc.subjectCatalase
dc.subjectDown syndrome
dc.subjectG2 checkpoint
dc.subjectLymphocytes
dc.subjectOxidative DNA damage
dc.titleG2 checkpoint-dependent DNA repair and its response to catalase in Down syndrome and control lymphocyte cultures
dc.typeArtículo de revista


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