I have a big problem!!!! I want to do diagnostic of Prader-Willi/Angelman Syndrome (uniparenteral disomy). I need to know the methylation status. For this I use BISULFITE KIT (Qiagen). Then I have quantified DNA concentration of my samples. Then I have to do methylation specific PCR assay. I have next reactives for each sample:
Buffer 10x= 3 microL
Taq Gold 5U/microL=0.6microL.
dNTP ´s 2.5Mm=2.4microL
Primers (maternal primer, paternal primer) (100microM each)= 1.5microL
Total volumen= 30microL.
I use program of PCR from a Kubota´s article “METHYLATION-SPECIFIC PCR SIMPLIFIES IMPRINTING ANALISYS”: 95ºC, 10´, 35 cycles: 94ºC 30”, 62ºC 30”, 72ºC 30”, and final extension 72ºC 10´.
Then I have separated PCR products in 3% agarose gel.
In this moment I have got amplificated only in samples treated with maternal primer.
Somebody knows Where is the problem!!???!!!, PLEASE!!!
Thank you in advance!
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methylation specific PCR assay (PWS/A syndrome)
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