[Study of genome instability using DNA fingerprinting of the offspring of male mice subjected to chronic low dose gamma irradiation].
By a polymerase chain reaction with an arbitrary primer (AP-PCR), the possibility of transmission of genome instability to somatic cells of the offspring (F1 generation) from male parents of mice exposed to chronic low-level gamma-radiation was studied. Male BALB/c mice 15 days after exposure to 10-50 cGy were mated with unirradiated females. Biopsies were taken from tale tips of two month-old offspring mice and DNA was isolated. The primer in the AP-PCR was a 20-mer oligonucleotide flanking the microsatellite locus Atp1b2 on chromosome 11 of the mouse. A comparative analysis of individual fingerprints of AP-PCR products on DNA-templates from the offspring of irradiated and unirradiated male mice revealed an increased variability of microsatellite-associated sequences in the genome of the offspring of the males exposed to 25 and 50 cGy. The DNA-fingerprints of the offspring of male mice exposed to chronic irradiation with the doses 10 and 25 cGy 15 days before fertilization (at the post-meiotic stage of spermatogenesis) showed an increased frequency of "non-parent bands". The results of the study point to the possibility of transmission to the offspring somatic cells of changes increasing genome instability from male parents exposed to chronic low-level radiation prior to fertilization.
Institute of Theoretical and Experimental Biophysics, Russian Academy of Sciences, Pushchino, 142290, Moscow oblast. bezlepkin@venus.iteb.serpukhov.su
V G
VG
Bezlepkin
G V
GV
Vasil'eva
M G
MG
Lomaeva
N P
NP
Sirota
A I
AI
Gaziev
D000818:Animals; D004249:DNA Damage; D016172:DNA Fingerprinting; D005260:Female; D005720:Gamma Rays; D016678:Genome; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D018895:Microsatellite Repeats; D011247:Pregnancy; D011829:Radiation Dosage; D011833:Radiation Injuries, Experimental / Q000235:genetics*; D019105:Random Amplified Polymorphic DNA Technique