Linked Life Data

19843683

Source:http://linkedlifedata.com/resource/pubmed/id/19843683

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2009-11-10
pubmed:abstractText
Some experimental evidence suggests that BRCA1 plays a role in repair of oxidative DNA damage. Selenium has anticancer properties that are linked with protection against oxidative stress. To assess whether supplementation of BRCA1 mutation carriers with selenium have a beneficial effect concerning oxidative stress/DNA damage in the present double-blinded placebo control study, we determined 8-oxodG level in cellular DNA and urinary excretion of 8-oxodG and 8-oxoGua in the mutation carriers. We found that 8-oxodG level in leukocytes DNA is significantly higher in BRCA1 mutation carriers. In the distinct subpopulation of BRCA1 mutation carriers without symptoms of cancer who underwent adnexectomy and were supplemented with selenium, the level of 8-oxodG in DNA decreased significantly in comparison with the subgroup without supplementation. Simultaneously in the same group, an increase of urinary 8-oxoGua, the product of base excision repair (hOGG1 glycosylase), was observed. Therefore, it is likely that the selenium supplementation of the patients is responsible for the increase of BER enzymes activities, which in turn may result in reduction of oxidative DNA damage. Importantly, in a double-blinded placebo control prospective study, it was shown that in the same patient groups, reduction in cancer incidents was observed. Altogether, these results suggest that BRCA1 deficiency contributes to 8-oxodG accumulation in cellular DNA, which in turn may be a factor responsible for cancer development in women with mutations, and that the risk to developed breast cancer in BRCA1 mutation carriers may be reduced in selenium-supplemented patients who underwent adnexectomy.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1538-7755
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2923-8
pubmed:meshHeading
pubmed-meshheading:19843683-Adnexal Diseases, pubmed-meshheading:19843683-BRCA1 Protein, pubmed-meshheading:19843683-Breast Neoplasms, pubmed-meshheading:19843683-Case-Control Studies, pubmed-meshheading:19843683-Chromatography, High Pressure Liquid, pubmed-meshheading:19843683-DNA Damage, pubmed-meshheading:19843683-Deoxyguanosine, pubmed-meshheading:19843683-Dietary Supplements, pubmed-meshheading:19843683-Double-Blind Method, pubmed-meshheading:19843683-Female, pubmed-meshheading:19843683-Humans, pubmed-meshheading:19843683-Leukocytes, pubmed-meshheading:19843683-Mutation, pubmed-meshheading:19843683-Ovarian Neoplasms, pubmed-meshheading:19843683-Oxidation-Reduction, pubmed-meshheading:19843683-Oxidative Stress, pubmed-meshheading:19843683-Placebos, pubmed-meshheading:19843683-Prognosis, pubmed-meshheading:19843683-Sodium Selenite, pubmed-meshheading:19843683-Uric Acid, pubmed-meshheading:19843683-Vitamins
pubmed:year
2009
pubmed:articleTitle
Selenium supplementation reduced oxidative DNA damage in adnexectomized BRCA1 mutations carriers.
pubmed:affiliation
Department of Clinical Biochemistry, Nicolaus Copernicus University, Collegium Medicum in Bydgoszcz, Bydgoszcz, Poland.
pubmed:publicationType
Journal Article, Comparative Study, Randomized Controlled Trial, Research Support, Non-U.S. Gov't