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Table 5 DNA adducts in colon of male and female C57BL/6 mice

From: DNA polymerase κ suppresses inflammation and inflammation-induced mutagenesis and carcinogenic potential in the colon of mice

Experiment

DSS(%)

Days after the last DSS treatment

Male or female

Number of mice

Number of DNA adducts per 108 bases

8-oxo-dG

εdA

8-OH-AdG

HεdC

Experiment 1–1

0%

Male

4

93 ± 14 (4/4)

1.0 ± 0.1 (3/4)

1.0 ± 0.1 (4/4)

2.1 ± 0.6 (4/4)

1cycle, 1.5%

3 days

Male

4

86 ± 23 (4/4)

1.0 ± 0.1 (3/4)

1.1 ± 0.1 (4/4)

1.3 ± 0.1 (3/4)

1cycle, 2%

3 days

Male

4

93 ± 38 (4/4)

1.1 ± 0.4 (4/4)

1.2 ± 0.2 (4/4)

1.7 ± 0.5 (2/4)

1cycle, 2.5%

3 days

Male

4

89 ± 21 (4/4)

1.6 ± 1.1 (3/4)

1.2 ± 0.1 (4/4)

1.3 ± 0.3 (2/4)

0%

Female

4

106 ± 5 (4/4)

0.8 ± 0.2 (2/4)

1.2 ± 0.1 (4/4)

1.9 ± 0.2 (4/4)

1cycle, 1.5%

3 days

Female

4

87 ± 22 (4/4)

0.7 ± 0.3 (4/4)

1.1 ± 0.1 (4/4)

1.4 ± 0.5 (4/4)

1cycle, 2%

3 days

Female

4

99 ± 22 (4/4)

1.1 ± 0.3 (3/4)

1.1 ± 0.1 (4/4)

1.4 ± 0.2 (4/4)

1cycle, 2.5%

3 days

Female

4

81 ± 10 (4/4)

0.9 ± 0.4 (3/4)

1.2 ± 0.1 (4/4)

1.5 ± 0.5 (4/4)

Experiment 1–2

0%

Male

2

126 ± 42 (2/2)

ND

1.3 ± 0.1 (2/2)

2.3 ± 0.5 (2/2)

2cycle, 2%

2 days

Male

4

87 ± 15 (4/4)

0.8 ± 0.0 (2/4)

1.3 ± 0.3 (4/4)

1.4 ± NA (1/4)

0%

Female

2

107 ± 22 (2/2)

ND

1.1 ± 0.2 (2/2)

1.6 ± 0.2 (2/2)

2cycle, 2.5% → 2%

2 days

Female

3

97 ± 28 (3/3)

1.4 ± 0.8 (3/3)

1.2 ± 0.2 (3/3)

2.2 ± 1.4 (3/3)

  1. The data represent as follows: mean ± SD (number of mice in which adduct detected/number of mice tested)
  2. Means and SDs were calculated for samples in which adduct was detected
  3. The approximate detection limits of 8-oxo-dG, εdA, 8-OH-AdG and HεdC in the clean standards are 25 pM, 5 pM, 5 pM, 5 pM, respectively, but in real samples they increase to 30 pM, 6.3 pM, 12 pM, 8.2 pM due to ion suppression. Converting this using the average of the measured DNA amounts analyzed in this study (dG:375 μM), the detection limits of number of adducts per 108 bases are 8-oxo-dG (1.7), εdA (0.37), 8-OH-AdG (0.7)and HεdC(0.48)
  4. Abbreviations: 8-oxo-dG 8-oxo-7,8-dihydro-2'-deoxyguanosine, εdA, 1 N6-etheno-2'-deoxyadenosine, 8-OH-AdG 8-hydroy-1, N2-propanodeoxyguanosine, HεdC heptanone-etheno-2'-deoxycytidine, ND Not detected, NA Not applicable