title: Easy and rapid method of zygosity determination in transgenic mice by SYBR Green real-time quantitative PCR with a simple data analysis.
abstract: Establishment and maintenance of transgenic mouse strains require being able to distinguish homozygous from heterozygous animals. To date, the developed real-time quantitative PCR techniques are often complicated, time-consuming and expensive. Here, we propose a very easy and rapid method with a simple data analysis to determine zygosity in transgenic mice. We show that the real-time quantitative PCR using SYBR Green fluorescent dye can be applied to discriminate two-fold differences in copy numbers of the transgene. Our procedure has to fit only three simple requirements: (1) to design primers capable of detecting one Ct difference for two-fold differences in DNA amounts (2) to measure genomic DNA concentrations accurately and (3) to have a reference animal of known zygosity in each run. Then, if the Ct values for the control gene are similar in all samples, we are able to compare directly the Ct values for the transgene in every sample, and so, to deduce the zygosity status of each mouse relative to the reference animal. This method is really simple and reliable, and it may be valuable as a rapid screening tool for zygosity status in transgenic animals.
authors.affiliation: Immuno-endocrinology Unit, INRA U707, F-44307, Nantes, France.
authors.forename: Karine
authors.initials: K
authors.lastname: Haurogné
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Bach
authors.forename: Blandine
authors.initials: B
authors.lastname: Lieubeau
mesh_terms: D000818:Animals; D001483:Base Sequence; D052160:Benzothiazoles; D017931:DNA Primers / Q000235:genetics; D003627:Data Interpretation, Statistical; D003959:Diamines; D005456:Fluorescent Dyes; D018628:Gene Dosage; D019267:Hemagglutinin Glycoproteins, Influenza Virus / Q000235:genetics; D006579:Heterozygote; D006720:Homozygote; D007328:Insulin / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D008822:Mice, Transgenic / Q000235:genetics*; D009930:Organic Chemicals; D016133:Polymerase Chain Reaction / Q000379:methods* / Q000706:statistics & numerical data; D011401:Promoter Regions, Genetic; D011804:Quinolines; D051381:Rats
chemical_list: D052160:Benzothiazoles; D017931:DNA Primers; D003959:Diamines; D005456:Fluorescent Dyes; D019267:Hemagglutinin Glycoproteins, Influenza Virus; D007328:Insulin; D009930:Organic Chemicals; D011804:Quinolines; C098022:SYBR Green I