New improved approaches for DYS385 detection / 法医学杂志

ABSTRACT

OBJECTIVE@#To establish more sensitive methods for detection of DYS385 in routine forensic casework.@*METHODS@#The primers recommended by Genome Database (GDB) and Schneider were used to amplify DYS385 respectively. Then, a semi-nested PCR of DYS385 was designed by using the two different primers as outer and inner primer. A series of experiments were carried out to achieve good result by adjusting the ratio of outer/inner primer and optimizing the PCR condition.@*RESULTS@#It showed that an overall 112 bp shorter DYS385 fragments and better electrophoretic separation were obtained by using primer2B. By using the semi-nested PCR approach, the shorter specific DYS385 fragments could be amplified and detectable DNA amounted to 50 pg.@*CONCLUSION@#This method is 20 fold more sensitive than the ordinary method.