Rapid and simple sex determination method from dental pulp by loop-mediated isothermal amplification.

Sex determination from dental pulp DNA was examined by loop-mediated isothermal amplification (LAMP) method. Amelogenin locus was analyzed for sex determination. A set of four specially designed primers was prepared based on database from Gene Bank, and loop primers were designed to shorten the analysis time. Analysis was performed using 32 dental pulp DNA samples removal from permanent teeth stored at room temperature for 1-25 years after extraction. The X allele was detected in approximately 32min with real-time turbidimeter and the Y allele was detected in approximately 34min. Analysis time was reduced to half when using loop primers. Visual detection was also possible as the amplified product showed white turbidity. Sex determination by LAMP method was rapid and simple, and it should prove useful in unknown bodies of mass disasters.