Sökning: "Comet assay"

Visar resultat 11 - 15 av 27 avhandlingar innehållade orden Comet assay.

1. 11. Effects of Antioxidants and Pro-oxidants on Oxidative Stress and DNA Damage using the Comet Assay : Studies on Blood Cells from Type 2 Diabetes Subjects and Mouse Lymphoma Cells

   Författare :Rikard Åsgård; Björn Hellman; Leif Busk; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; metabolic syndrome; fruit and vegetable intake; plasma antioxidants; beta-carotene; alpha-tocopherol; inflammation; oxidative DNA damage; lipid peroxidation; mouse lymphoma assay; ROS; nucleotide pool; viability; DNA dye; Toxicology; Toxikologi;

   Sammanfattning : Diet and oral supplements comprise two distinct sources of antioxidants known to prevent oxidative stress. Beneficial effects from antioxidants have been seen for patients at risk for type 2 diabetes.The aim of this thesis was to evaluate the positive effects of antioxidants against oxidative stress and DNA damage in type 2 diabetes subjects. LÄS MER

3. 12. International validation of the comet assay and a human intervention study

   Författare :Clara Ersson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : The comet assay is an established, sensitive method extensively used in biomonitoring studies. The methods’ advantages include; a) only a small cell sample is required, b) possibility to measure damage in practically any cell type, c) ability to measure heterogeneity in response within a cell population, d) relatively fast and economical procedure, and e) various applications of the method, which allow measurement of a range of different DNA lesions as well as DNA repair. LÄS MER

4. 13. Measurement of primary DNA damage in individual cells from humans and mice using the alkaline single cell gel electrophoresis assay

   Författare :Hamid Vaghef; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical biosciences; Farmaceutisk biovetenskap; Biopharmacy; Biofarmaci; arbets- och miljömedicin; Occupational and Environmental Medicine;

   Sammanfattning : Primary DNA damage is considered to be an important step in the development of tumours and itmay also serve as a biomarker of genotoxic stress. Measurement of DNA strand breaks in peripherallymphocytes can yield useful information about the suitability of these cells for biomonitoring purposesand subsequently risk assessment. LÄS MER

5. 14. DNA repair and genome organisation in mammalian cells : studies involving single-cell electrophoresis

   Författare :Stefan Eriksson; Bert van Zeeland; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physical Biology; fysikalisk biologi;

   Sammanfattning : The comet assay (single-cell electrophoresis) is a comparably new method for measurement of DNA strand breakage, primarily in eukaryotic cells. Its main advantage is that it works on the single-cell level, making it possible to detect heterogeneity in DNA damage induction and repair. LÄS MER

7. 15. Induction of apoptosis in relation to chromatin structure and inhibition of replication by DNA damage from ionizing radiation

   Författare :Jesper Torudd; Mats Harms-Ringdahl; Mats Ljungman; Stockholms universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ionizing radiation; DNA-loop; replication fork; Toxicology; Toxikologi;

   Sammanfattning : The theme of this thesis has been chromatin organization ranging from methodological studies to involvement in apoptotic response. The aims have been: (i) to compare the information obtained by the AVTD method and comet assay concerning DNA-loop organization, (ii) to test the hypothesis that DNA-loop relaxation could be the triggering signal for induction of apoptosis in G0-lymphocytes, and (iii) to study the dose response for inhibition of the replication fork movement and pathways for the DNA repair process at the replication fork. LÄS MER