Words similar to adducts
Example sentences for: adducts
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MGMT gene encodes O(6)-methylguanine-DNA methyltransferase and this enzyme effectively removes DNA adducts formed by alkylating agents [ 33 ] . Epigenetic gene silencing of MGMT confers enhanced sensitivity to alkylating-based chemotherapy, and lack of methylation associates with failure to respond to chemotherapy [ 34 35 ] . On the contrary, all patients that had MGMT promoter methylation were dead within 21 months of initial diagnosis, which predicts a poor prognosis.
However, no specific protein was positively identified [ 63 ] . More recently, the formation of 4-HNE protein adducts was also demonstrated by Western blot analysis from the heart [ 64 ] , the liver [ 65 ] and the kidney [ 66 ] under oxidative stress.
Cellular 4-HNE protein adducts were detected by rabbit anti-4-HNE antibodies (Calbiochem, San Diego, CA, used at 1:250) followed by anti-rabbit secondary antibody labeled with FITC (Dako Corporation, Carpinteria, CA).
However, the nuclear localization of 8-OH-dG [ 32 ] and the increased Ogg1 reported here are consistent with a model in which mitochondrial Ogg1 is up-regulated but nuclear Ogg1 is not, leading to an increase in nuclear but not mitochondrial 8-OH-dG adducts [ 32 ] . Further studies will be required to resolve this issue, but β-cells in type 2 diabetes may well suffer from both nuclear and mitochondrial DNA damage, leading to decreased β-cell function and eventual loss of β-cell mass.
Subsequent experiments with immunofluorescent staining indicated that 1.5 mM H 2 O 2 treatment of ARPE-19 cells for 4 hours led to the formation of 4-HNE protein adducts both in the cytoplasm and nucleus, presumably as a result of lipid-peroxidation (Fig.
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