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memo - Magazine of European Medical Oncology

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02.12.2020 | original report

The emerging role of NOTCH target genes in Egyptian childhood acute lymphoblastic leukemia

verfasst von: Mona Reyad, Sherin Abdel-Aziz, Layla M. Saleh, Samah El-Ghlban, Ibrahim El Tantawy El Sayed, Hasan Abdel-ghaffar

Erschienen in: memo - Magazine of European Medical Oncology | Ausgabe 1/2021

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Summary

Background

Acute lymphoblastic leukemia (ALL), characterized by overproduction and accumulation of immature lymphoid cells in bone marrow and peripheral blood, is the most common malignancy in children. NOTCH signaling is suggested to be a key event in hematological malignancies and appears to be a major oncogenic trigger in leukemia. Several studies on NOTCH target gene (HES‑1, p21 and c‑Myc) expression evaluated the correlation between these genes in AML (acute myeloid leukemia), but this relationship has not yet been clarified in ALL. Therefore, we aimed to study the expression of these genes in our Egyptian patients with ALL to obtain more information.

Patients and methods

RNA was extracted from peripheral blood mononuclear cells (PBMNCs) of 91 pediatric ALL patients (49 B-cell acute lymphoblastic leukemia [B-ALL] and 42 T-cell acute lymphoblastic leukemia [T-ALL]) and 52 healthy controls. The expression levels were determined by quantitative real-time polymerase chain reaction (qRT-PCR).

Results

Median p21 and HES1 expressions were down regulated, while c‑Myc expression was up-regulated in B‑ALL cases (p < 0.001, p = 0.008, p < 0.001, respectively) and in T‑ALL cases (p = 0.049, p = 0.015, p < 0.001, respectively) when compared to the control group. Median HES1 expression was down regulated, in B‑ALL cases compared to T‑ALL cases (p = 0.002), while P21 and c‑Myc did not differ significantly between B‑ALL and T‑ALL cases.

Conclusion

P21 expression showed a significant positive correlation with HES1 expression and c‑Myc showed nonsignificant negative correlations with p21 and HES1, thus, suggesting that HES1 may affect ALL cells through the HES1–p21 pathway. Patients with over expressed c‑Myc had worse survival than patients with low expression which suggested it is a risk predictor.

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Titel: The emerging role of NOTCH target genes in Egyptian childhood acute lymphoblastic leukemia
verfasst von: Mona Reyad
Sherin Abdel-Aziz
Layla M. Saleh
Samah El-Ghlban
Ibrahim El Tantawy El Sayed
Hasan Abdel-ghaffar
Publikationsdatum: 02.12.2020
Verlag: Springer Vienna
Erschienen in: memo - Magazine of European Medical Oncology / Ausgabe 1/2021
Print ISSN: 1865-5041
Elektronische ISSN: 1865-5076
DOI: https://doi.org/10.1007/s12254-020-00665-2

Springer Medizin Österreich

Summary

Background

Patients and methods

Results

Conclusion

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