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Updated: Mar 19, 2026
Wild-type Blocking PCR Combined with Direct Sequencing as a Highly Sensitive Method for Detection of Low-Frequency Somatic Mutations
Published on: March 29, 2017
The added values of multiplex reverse transcriptase-PCR followed by mutation screening in the initial evaluation of
1Department of Laboratory Medicine, University of Ulsan, College of Medicine and Asan Medical Center, Seoul, Korea.
Introduction:
This study investigates the benefits of using multiplex reverse transcriptase-PCR (RT-PCR) in addition to standard karyotyping during the initial evaluation of acute leukemia.
Methods:
A total of 1114 consecutive specimens from patients with acute leukemia were tested using a commercial multiplex RT-PCR kit (HemaVision, DNA Diagnostic). NPM1 and CEBPA mutations were selectively tested in acute myeloid leukemia (AML) patients with multiplex RT-PCR negativity.
Results:
In specimens with optimal cytogenetics, the frequency of recurrent translocations was 31.3%, and cryptic translocations were detected in 2.1% of samples. The concordance rate between karyotyping and multiplex RT-PCR was 97.5%. In addition to the established functions, we demonstrated the additional benefits of multiplex RT-PCR, including successful molecular characterization, even in cytogenetically suboptimal specimens (5.7%); detection of submicroscopic aberrations (1.0%); detection of rare but potentially significant translocations or variants (2.5%); selection of AML candidates for mutation analysis (68.3%); and finally exclusion of recurrent translocations in patients with acute lymphoblastic leukemia or mixed phenotype acute leukemia (22.5%).
Conclusion:
We reconfirmed the accuracy and reliability of multiplex RT-PCR for diagnosing acute leukemia and demonstrated additional advantages of this system for the initial evaluation of acute leukemia. Thus, multiplex RT-PCR is worth considering in diagnostic testing of acute leukemias.
