Identification of t(15;17) PML-RARA translocation in acute promyelocytic leukemia prediagnosed children and adult cases by real time qRT-PCR with 5 year follow up results

Volume: 53 Number: 4 December 1, 2014
  • Tezcanlı Kaymaz B
  • Bozok Çetintaş V
  • Tetik Vardarlı A
  • Yılmaz üslüer S
  • Aygüneş D
  • Dalmızrak A
  • Aktan Ç
  • Küçükaslan A Ş
  • Balcı T
  • Kayabaşı Ç
  • Özmen Yelken B
  • Selvi Günel N
  • Biray Avcı Ç
  • Kosova B
  • Eroğlu Z
  • Aksoylar S
  • Çetingül N
  • Balkan C
  • Yılmaz D
  • Aydınok Y
  • Avaklı K
  • Töbü M
  • Tombuloğlu M
  • Şahin F
  • Büyükkeçeci F
  • Saydam G
  • Gündüz C
EN TR

Identification of t(15;17) PML-RARA translocation in acute promyelocytic leukemia prediagnosed children and adult cases by real time qRT-PCR with 5 year follow up results

Abstract

Aim: Acute promyelocytic leukemia (APL) is a well-defined subtype of acute myeloid leukemia (AML) specifically characterized by the t(15;17)(q22;q12) translocation. t(15;17) results in the fusion of the genes, promyelocytic leukemia (PML) on chromosome 15 and retinoic acid receptor alpha (RARA) located on 17th chromosome. Translocation is detected by conventional cytogenetic, fluorescence in situ hybridization analyses (FISH) and often a real time quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) method. In this study, quantification of t(15; 17) translocation via real time qRT-PCR was aimed in blood or bone marrow materials belonging to APL pre-diagnosed cases that appealed our department. Materials and Methods: Seventy nine children (7.28 ± 5.20 years; 45 M, 34 F) and 359 adults (47.71 ± 15.57 years; 193 M, 166 F) were included in the study between the years 2009-2013. Following total RNA isolation from blood or bone marrow materials of the cases, cDNA synthesis was carried out. Then, t(15; 17) translocation was studied by qRT-PCR and quantitated. Results: Two cases from children (3%), and in total 6 tests (5%) were detected positive for t(15;17). The average t(15;17) quantification value was 0.0002 ± 0.0003. Twenty six cases of the adults (7%), in total 30 tests (8%) were determined as t(15;17) positive. Average t(15;17) quantification value of these cases was 0.067 ± 0.144. Conclusion: The superiority of qRT-PCR compared to conventional cytogenetic studies can be found in the fact that all working steps can be monitored simultaneously during the test and the resulting amplicons can be quantitated. The clinical significance of t(15;17) qualitative determination is, confirmation of the diagnosis, all trans-retinoic acid and trioxide arsenic treatment response prediction and treatment efficacy knowledge in addition to minimal residual disease (MRD) monitoring and ability to identify relapse at early ages.

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Primary Language

Turkish

Subjects

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Journal Section

-

Authors

Tezcanlı Kaymaz B

Bozok Çetintaş V

Tetik Vardarlı A

Yılmaz üslüer S

Aygüneş D

Dalmızrak A

Aktan Ç

Küçükaslan A Ş

Balcı T

Kayabaşı Ç

Özmen Yelken B

Selvi Günel N

Biray Avcı Ç

Kosova B

Eroğlu Z

Aksoylar S

Çetingül N

Balkan C

Yılmaz D

Aydınok Y

Avaklı K

Töbü M

Tombuloğlu M

Şahin F

Büyükkeçeci F

Saydam G

Gündüz C

Publication Date

December 1, 2014

Submission Date

December 1, 2014

Acceptance Date

-

Published in Issue

Year 1970 Volume: 53 Number: 4

Vancouver
1.Tezcanlı Kaymaz B, Bozok Çetintaş V, Tetik Vardarlı A, Yılmaz üslüer S, Aygüneş D, Dalmızrak A, Aktan Ç, Küçükaslan A Ş, Balcı T, Kayabaşı Ç, Özmen Yelken B, Selvi Günel N, Biray Avcı Ç, Kosova B, Eroğlu Z, Aksoylar S, Çetingül N, Balkan C, Yılmaz D, Aydınok Y, Avaklı K, Töbü M, Tombuloğlu M, Şahin F, Büyükkeçeci F, Saydam G, Gündüz C. AML hastalarında t(15;17) PML-RARA translokasyonunun real time RT-PCR ile 5 yıllık sonuçlarının değerlendirilmesi. EJM. 2014 Dec. 1;53(4):184-8. doi:10.19161/etd.344085

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