Clinical Value of miR-3151 Overexpression in Synergistic Interaction with BAALC Host Gene in Patients with Acute Myeloid Leukemia after Allogeneic Hematopoietic Stem Cell Transplantation

Background. Among a multitude of molecular genetic changes underlying acute myeloid leukemia (AML) disordered epigenetic regulation is of special importance. It includes expression change in miR-3151 gene forming a part of BAALC gene on chromosome 8 in q22.3 locus. At present BAALC gene overexpression is observed in a half of AML patients. A considerable part of them shows a combination of it with an increased transcriptional activity of miR-3151 gene, which is associated with the poorest AML prognosis.

Aim. To assess the prognostic value of miR-3151 overexpression in synergistic interaction with BAALC host gene in AML patients after allogeneic hematopoietic stem cell transplantation (allo-HSCT).

Materials & Methods. The trial included bone marrow samples taken from 10 healthy SCT donors and 29 AML patients after receiving allo-HSCT. Relative miR-3151 expression level and relative BAALC copy number were measured by quantitative real-time polymerase chain reaction.

Results. The analysis yielded a poor correlation between miR-3151 expression level and blast cell count in bone marrow (r = 0.330; p = 0.005) as well as between the expression levels of miR-3151 and BAALC (r = 0.273; p = 0.020). In addition, a great prognostic value of miR-315 overexpression in post-transplantation period was confirmed (p = 0.005). Patients with miR-315 and BAALC co-expression in post-transplantation period have also the poorest prognosis than the control group with regard to both disease-free survival and relapse risks within 2 years after allo-HSCT.

Conclusion. Monitoring expression level of miR-3151 and its host gene BAALC in AML patients after receiving allo-HSCT seems to be important not only in AML prognosis but also in therapy efficacy evaluation.

• Alena Igorevna Shakirova RM Gorbacheva Scientific Research Institute of Pediatric Oncology, Hematology and Transplantation; IP Pavlov First Saint Petersburg State Medical University, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022 ; НИИ детской онкологии, гематологии и трансплантологии им. Р.М. Горбачевой, ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова», ул. Льва Толстого, д. 6/8, Санкт-Петербург, Российская Федерация, 197022
• I.M. Barkhatov RM Gorbacheva Scientific Research Institute of Pediatric Oncology, Hematology and Transplantation; IP Pavlov First Saint Petersburg State Medical University, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022 ; НИИ детской онкологии, гематологии и трансплантологии им. Р.М. Горбачевой, ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова», ул. Льва Толстого, д. 6/8, Санкт-Петербург, Российская Федерация, 197022
• A.I. Churkina RM Gorbacheva Scientific Research Institute of Pediatric Oncology, Hematology and Transplantation; IP Pavlov First Saint Petersburg State Medical University, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022 ; НИИ детской онкологии, гематологии и трансплантологии им. Р.М. Горбачевой, ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова», ул. Льва Толстого, д. 6/8, Санкт-Петербург, Российская Федерация, 197022
• N.N. Mamaev RM Gorbacheva Scientific Research Institute of Pediatric Oncology, Hematology and Transplantation; IP Pavlov First Saint Petersburg State Medical University, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022 ; НИИ детской онкологии, гематологии и трансплантологии им. Р.М. Горбачевой, ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова», ул. Льва Толстого, д. 6/8, Санкт-Петербург, Российская Федерация, 197022
• L.S. Zubarovskaya RM Gorbacheva Scientific Research Institute of Pediatric Oncology, Hematology and Transplantation; IP Pavlov First Saint Petersburg State Medical University, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022 ; НИИ детской онкологии, гематологии и трансплантологии им. Р.М. Горбачевой, ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова», ул. Льва Толстого, д. 6/8, Санкт-Петербург, Российская Федерация, 197022
• B.V. Afanas’ev RM Gorbacheva Scientific Research Institute of Pediatric Oncology, Hematology and Transplantation; IP Pavlov First Saint Petersburg State Medical University, 6/8 L’va Tolstogo str., Saint Petersburg, Russian Federation, 197022 ; НИИ детской онкологии, гематологии и трансплантологии им. Р.М. Горбачевой, ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова», ул. Льва Толстого, д. 6/8, Санкт-Петербург, Российская Федерация, 197022

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