Stmm6^MSM/Ms
QTL Variant Detail

Summary

• QTL variant: Stmm6^MSM/Ms
• Name: skin tumor modifier of MSM 6; MSM/Ms
• MGI ID: MGI:5795933
• QTL: Stmm6 Location: unknown Genetic Position: Chr3, Syntenic

Variant origin

• Strain of Specimen: MSM/Ms

Variant description

• Allele Type: QTL

Notes

Mapping and Phenotype information for this QTL, its variants and associated markers

J:193231

To identify genetic determinants of skin cancer susceptibility and carcinoma development, a large backcross population of FVB/NJcl x (FVB/NJcl x MSM/Ms) F1 mice were subjected to DMBA/TPA-induced skin carcinogenesis. MSM/Ms mice are more resistant to chemically induced skin tumor development than the highly susceptible FVB/N strain.

(FVB/NJcl x MSM/Ms) male mice were backcrossed with female FVB/NJcl mice generating 121 F1 Tpr53 homozygous mice, p53+/+. Tpr53 deficient male mice (FVB/NJcl x MSM.Cg-Trp53^tm1Sia/+) were backcrossed to female FVB/NJcl mice generating 107 Tpr53 heterozygous F1 backcross mice, p53+/-. Mice were genotyped using PCR assays.

Tumor development was monitored for a period of 40 weeks; the number of papillomas at 20 weeks as well as the presence of carcinomas at 40 weeks was documented. In addition papillomas were categorized into three groups based on diameter size, ^{2mm, 2-6mm and} 6mm. All mice were genotyped using 107 SNP markers distributed evenly over the genome.

In the FVB/NJcl x (FVB/NJcl x MSM/Ms) F1 backcrossed mice significant linkage mapped to Chromosome 3. QTL Stmm6, a measure of the total number of papillomas between 2 and 6mm, LOD=3.728 was detected at 42.0 cM on Chr 3.

References

• Original: J:193231 Okumura K, et al., Independent genetic control of early and late stages of chemically induced skin tumors in a cross of a Japanese wild-derived inbred mouse strain, MSM/Ms. Carcinogenesis. 2012 Nov;33(11):2260-8
• All: 1 reference(s)