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Animal Bioresource in Japan

.: Home > Animal Bioresource in Japan > 2013 > Volume 62 Number 3 > Osamu Suzuki, Minako Koura, Yoko Noguchi, Kozue Uchio-Yamada, Junichiro Matsuda

Zygosity Determination in Hairless Mice by PCR Based on Hrhr Gene Analysis

Osamu Suzuki, Minako Koura, Yoko Noguchi, Kozue Uchio-Yamada, Junichiro Matsuda
Laboratory of Animal Models for Human Diseases, National Institute of Biomedical Innovation, 7–6–8 Saito- Asagi, Ibaraki, Osaka 567-0085, Japan
Abstract :

We analyzed the Hr gene of a hairless mouse strain of unknown origin (HR strain, to determine whether the strain shares a mutation with other hairless strains, such as HRS/J and Skh:HR-1, both of which have an Hrhr allele. Using PCR with multiple pairs of primers designed to amplify multiple overlapping regions covering the entire Hr gene, we found an insertion mutation in intron 6 of mutant Hr genes in HR mice. The DNA sequence flanking the mutation indicated that the mutation in HR mice was the same as that of Hrhr in the HRS/J strain. Based on the sequence, we developed a genotyping method using PCR to determine zygosities. Three primers were designed: S776 (GGTCTCGCTGGTCCTTGA), S607 (TCTGGAACCAGAGTGACAGACAGCTA), and R850 (TGGGCCACCATGGCCAGATTTAACACA). The S776 and R850 primers detected the Hrhr allele (275-bp amplicon), and S607 and R850 identified the wild-type Hr allele (244-bp amplicon). Applying PCR using these three primers, we confirmed that it is possible to differentiate among homozygous Hrhr (longer amplicons only), homozygous wild-type Hr(shorter amplicons only), and heterozygous (both amplicons) in HR and Hos:HR-1 mice. Our genomic analysis indicated that the HR, HRS/J, and Hos:HR-1 strains, and possibly Skh:HR-1 (an ancestor of Hos:HR-1) strain share the same Hrhr gene mutation. Our genotyping method will facilitate further research using hairless mice, and especially immature mice, because pups can be genotyped before their phenotype (hair coat loss) appears at about 2 weeks of age.

Keywords :
hairless, genome, genotyping, mice, zygosity

Date Deposited : 06 Apr 2015 12:10

Last Modified : 06 Apr 2015 12:10

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Volume 62, Number 3, - 2013

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