Methods
Leukocyte isolation from venous blood.
Venous blood
samples from the patients were collected in heparinized
Vacuette tubes. The blood was carefully applied on the
top of Histopaque 1119 solution (Sigma-Aldrich) and
the leukocytes were isolated by centrifugation according
to the procedure laid down by the manufacturer.
DNA isolation and 8-oxodG determination in DNA
isolates.
DNA from the leukocytes was isolated using
themethod asdescribed earlier.Determination of 8-oxodG
by means of high-performance liquid chromatography
(HPLC)/with electrochemical detection (EC) technique
was described previously (20)