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International Journal of Hematology-Oncology and Stem Cell Research، جلد ۱۰، شماره ۳، صفحات ۱۴۷-۱۵۲

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عنوان انگلیسی Evaluation of Minimal Residual Disease in Acute Myeloid Leukemia with NPM1 Marker
چکیده انگلیسی مقاله Background: Minimal residual disease (MRD) tests provide early identification of hematologic relapse and timely management of acute myeloid leukemia (AML) patients. Approximately, 50% of AML patients do not have clonal chromosomal aberrations and categorize as a cytogenetically normal acute myeloid leukemia (CN-AML). About 60% of adult CN-AML has a mutation in exon 12 of NPM1 gene. This mutation is specific for malignant clone and potentially is a good marker of MRD. In this retrospective study, we set up a quantitative test for quantifying NPM1 type A mutation and AML patients carrying this mutation at the time of diagnosis, were followed-up. Materials and Methods : We prepared plasmids containing a cDNA fragment of NPM1 and ABL genes by PCR cloning. The plasmids were used to construct standard curves. Eleven patients were analyzed using established method. Serial PB and/or BM samples (n=71) were taken in 1-3 months intervals (mean 1.5-month intervals) and median follow-up duration after chemotherapy was 11 months (5-28.5 months). Results: In this study, we developed RNA-based RQ-PCR to quantitation of NPM1 mutation A with sensitivities of 10 (-5) . The percent of NPMmut/ABL level showed a range between 132 and 757 with median of 383.5 in samples at diagnosis. The median NPMmut transcript level log reduction was 3 logs. Relapse occurred in 54.5% of patients (n=6), all cases at diagnosis demonstrated the same mutation at relapse. In patients who experienced relapse, log reduction levels of NPM1 mRNA transcript after therapy were 4 (n=2), 3 (n=2) and 1 log (n=2). Totally, NPMmut level showed less than 5 log reduction in all of them, whereas this reduction was 5-6 logs in other patients. Conclusion : Despite the limitations of this study in terms of sample size and duration of follow-up, it showed the accuracy of set up for detection of mutation and this marker has worth for following-up at different stages of disease. Because of high frequency, stability, specificity to abnormal clone and high sensitivity, NPM1 is a suitable marker for monitoring of NPMc+ AML patients.
کلیدواژه‌های انگلیسی مقاله Acute myeloid leukemia, MRD, NPM1 mutation, Q-RT-PCR

نویسندگان مقاله نسرین علیزاد قندفروش | nasrin alizad ghandforoush
msc, department of hematology, school of allied medical sciences, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

بهرام چهاردولی | bahram chahardouli
assistant professor, hematology-oncology and stem cell transplantation research center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

شهربانو رستمی | shahrbano rostami
assistant professor, hematology-oncology and stem cell transplantation research center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

حبیبه قدیمی | habibeh ghadimi
msc student, hematology-oncology and stem cell transplantation research center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

علی قاسمی | ali ghasemi
phd student of hematology, blood transfusion research center, high institute for research and education in transfusion medicine, tehran, iran

سازمان اصلی تایید شده: سازمان انتقال خون ایران (Blood transfusion research center)

کامران علی مقدم | kamran alimoghaddam
professor, hematology-oncology and stem cell transplantation research center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

اردشیر قوام زاده | ardeshir ghavamzadeh
professor, hematology-oncology and stem cell transplantation research center, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

فاطمه نادعلی | fatemeh nadali
associate professor, department of hematology, school of allied medical sciences, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)


نشانی اینترنتی http://ijhoscr.tums.ac.ir/index.php/ijhoscr/article/view/497
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