Basic Research
Copyright ©The Author(s) 2003.
World J Gastroenterol. Mar 15, 2003; 9(3): 578-583
Published online Mar 15, 2003. doi: 10.3748/wjg.v9.i3.578
Table 1 Oligonucleotide primers in multiplex PCR of the hu-man HPRT locus
ExonsPrimers sequence (5’-3’)Fragment size (bp)
1F TGG GAC GTC TGG TCC AAG GAT TCA626
R CCG AAC CCG GGA AAC TGG CCG CCC
2F CCT GAT ATG CTC TCA TTG AAA CA211
R GCT GCT GAT GTT TGA AAT TAA CAC
3F GTT TAA TGA CTA AGA GGT GTT TG311
R GAA AAC CTA GTG TTG CCA CAT AA
4F GTG TGT GTA CAT AAG GAT ATA CA165
R TTC TTC CCT TTC AAG ATA CAT AC
5F GGA AAT ACC GTT TTA TTC ATT GT125
R GTG CAT ACT AAG TTA GAA AGG TC
6F GTG ACT CTG AAT TTA AAG CTA TG150
R CTG TGT CAA AAT GTC ATA CAT AC
7/8F GTC TCT CTG TAT GTT ATA TGT CAC379
R TGC GTG TTT TGA AAA ATG AGT GAG
9F GCT ATT CTT GCC TTT CAT TTC AG136
R CAA ACT CAA CTT GAA CTC TCA TC
Table 2 Cytotoxicity and mutagenicity of γ-rays and ENU in HL-60 cells
TypeDosePE(%)CE(%)MF( × 10-6)
Control (μg/mL)0.093.0186.645.13
ENU (μg/mL)12.575.9285.9117.73a
25.070.6778.6231.18b
50.061.4582.6764.45b
100.045.77b83.9182.61b
200.025.63b67.02106.70b
γ-ray (Gy)0.591.63146.0b12.30
1.069.31186.0b18.30b
2.055.34a108.223.20a
4.039.94b69.073.00b
Table 3 Summary of multiplex PCR analysis of THH-induced HPRT mutants in HL-60 cells
Categories of mutationNumber analyzedNumber showing PCR changes
Percentage deletedNumber showing no change
Complete deletionPartial deletion
Spontaneous1301/13 (7.7%)7.7%12/13 (92.3%)
ENU (μg/mL)
12.581/8 (12.5%)4/8 (50.0%)a62.5%b3/8 (37.5%)a
25.0102/10 (20.0%)5/10 (50.0%)a70.0%b3/10 (30.0%)b
50.0102/10 (20.0%)6/10 (60.0%)b80.0%b2/10 (20.0%)b
100.0124/12 (33.3%)a6/12 (50.0%)a83.3%b2/12 (16.7%)b
200.0197/19(36.8%)a10/19 (52.6%)a89.4%b2/19 (10.6%)b
γ-rays (Gy)
0.571/7 (14.3%)1/7 (14.3%)28.6%5/7 (71.4%)
1.0133/13 (23.1%)5/13 (38.5%)61.5%b5/13 (38.5%)b
2.0103/10 (30.0%)a3/10 (30.0%)60.0%b4/10 (40.0%)b
4.0177/17 (41.2%)b6/17(35.3%)76.5%b4/17 (23.5%)b
Table 4 Schematic diagram of the distribution of deletion within nine exons of the human HPRT gene
Types of exons deletion
Mutation clones
1234567/89NumberPercent (%)
Spontaneous mutants1292.3
—a17.7
ENU-induced mutants1220.3
35.1
23.4
46.8
23.4
11.7
23.4
23.4
23.4
11.7
11.7
35.1
11.7
1627.1
11.7
11.7
23.4
23.4
11.7
r-rays-induced mutants1838.3
12.1
12.1
24.3
24.3
12.1
12.1
36.4
12.1
12.1
24.3
1429.8