PMID- 35409154 OWN - NLM STAT- MEDLINE DCOM- 20220413 LR - 20220416 IS - 1422-0067 (Electronic) IS - 1422-0067 (Linking) VI - 23 IP - 7 DP - 2022 Mar 30 TI - Overcoming Steroid Resistance in Pediatric Acute Lymphoblastic Leukemia-The State-of-the-Art Knowledge and Future Prospects. LID - 10.3390/ijms23073795 [doi] LID - 3795 AB - Acute lymphoblastic leukemia (ALL) is the most common malignancy among children. Despite the enormous progress in ALL therapy, resulting in achieving a 5-year survival rate of up to 90%, the ambitious goal of reaching a 100% survival rate is still being pursued. A typical ALL treatment includes three phases: remission induction and consolidation and maintenance, preceded by a prednisone prephase. Poor prednisone response (PPR) is defined as the presence of >/=1.0 x 10(9) blasts/L in the peripheral blood on day eight of therapy and results in significantly frequent relapses and worse outcomes. Hence, identifying risk factors of steroid resistance and finding methods of overcoming that resistance may significantly improve patients' outcomes. A mitogen-activated protein kinase/extracellular signal-regulated kinase (MAPK-ERK) pathway seems to be a particularly attractive target, as its activation leads to steroid resistance via a phosphorylating Bcl-2-interacting mediator of cell death (BIM), which is crucial in the steroid-induced cell death. Several mutations causing activation of MAPK-ERK were discovered, notably the interleukin-7 receptor (IL-7R) pathway mutations in T-cell ALL and rat sarcoma virus (Ras) pathway mutations in precursor B-cell ALL. MAPK-ERK pathway inhibitors were demonstrated to enhance the results of dexamethasone therapy in preclinical ALL studies. This report summarizes steroids' mechanism of action, resistance to treatment, and prospects of steroids therapy in pediatric ALL. FAU - Kosmider, Kamil AU - Kosmider K AUID- ORCID: 0000-0003-3844-8831 AD - Student Scientific Society, Laboratory of Genetic Diagnostics, Medical University of Lublin, Gebali 6, 20-093 Lublin, Poland. FAU - Karska, Katarzyna AU - Karska K AD - Department of Pediatric Hematology, Oncology and Transplantology, Medical University of Lublin, Gebali 6, 20-093 Lublin, Poland. FAU - Kozakiewicz, Agata AU - Kozakiewicz A AD - Student Scientific Society, Laboratory of Genetic Diagnostics, Medical University of Lublin, Gebali 6, 20-093 Lublin, Poland. FAU - Lejman, Monika AU - Lejman M AD - Laboratory of Genetic Diagnostics, Medical University of Lublin, Gebali 6, 20-093 Lublin, Poland. FAU - Zawitkowska, Joanna AU - Zawitkowska J AUID- ORCID: 0000-0001-7207-156X AD - Department of Pediatric Hematology, Oncology and Transplantology, Medical University of Lublin, Gebali 6, 20-093 Lublin, Poland. LA - eng PT - Journal Article PT - Review DEP - 20220330 PL - Switzerland TA - Int J Mol Sci JT - International journal of molecular sciences JID - 101092791 RN - 0 (Glucocorticoids) RN - EC 2.7.11.24 (Extracellular Signal-Regulated MAP Kinases) RN - VB0R961HZT (Prednisone) SB - IM MH - Extracellular Signal-Regulated MAP Kinases/metabolism MH - Glucocorticoids/pharmacology/therapeutic use MH - Humans MH - *Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug therapy/genetics/pathology MH - *Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/metabolism MH - Prednisone/therapeutic use PMC - PMC8999045 OTO - NOTNLM OT - BH3 mimetics OT - IL-7 OT - JAK/STAT pathway OT - MAPK/ERK pathway OT - Ras pathway OT - acute lymphoblastic leukemia OT - glucocorticoids OT - poor prednisone response OT - proteasome inhibitors OT - steroids COIS- The authors declare no conflict of interest. EDAT- 2022/04/13 06:00 MHDA- 2022/04/14 06:00 PMCR- 2022/03/30 CRDT- 2022/04/12 01:12 PHST- 2022/01/22 00:00 [received] PHST- 2022/03/20 00:00 [revised] PHST- 2022/03/28 00:00 [accepted] PHST- 2022/04/12 01:12 [entrez] PHST- 2022/04/13 06:00 [pubmed] PHST- 2022/04/14 06:00 [medline] PHST- 2022/03/30 00:00 [pmc-release] AID - ijms23073795 [pii] AID - ijms-23-03795 [pii] AID - 10.3390/ijms23073795 [doi] PST - epublish SO - Int J Mol Sci. 2022 Mar 30;23(7):3795. doi: 10.3390/ijms23073795.