Abstract
The somatic translocation t(8;21)(q22;q22)/RUNX1-RUNX1T1 is one of the most frequent rearrangements found in children with standard-risk acute myeloid leukemia (AML). Despite the favorable prognostic role of this aberration, we recently observed a higher than expected frequency of relapse. Here, we employed an integrated high-throughput approach aimed at identifying new biological features predicting relapse among 34 t(8;21)-rearranged patients. We found that the DNA methylation status of patients who suffered from relapse was peculiarly different from that of children maintaining complete remission. The epigenetic signature, made up of 337 differentially methylated regions, was then integrated with gene and protein expression profiles, leading to a network, where cell-to-cell adhesion and cell-motility pathways were found to be aberrantly activated in relapsed patients. We identified most of these factors as RUNX1-RUNX1T1 targets, with Ras Homolog Family Member (RHOB) overexpression being the core of this network. We documented how RHOB re-organized the actin cytoskeleton through its downstream ROCK–LIMK–COFILIN axis: this increases blast adhesion by stress fiber formation, and reduces mitochondrial apoptotic cell death after chemotherapy treatment. Altogether, our data show an epigenetic heterogeneity within t(8;21)-rearranged AML patients at diagnosis able to influence the program of the chimeric transcript, promoting blast re-emergence and progression to relapse.
| Original language | English |
|---|---|
| Pages (from-to) | 1-11 |
| Number of pages | 11 |
| Journal | Leukemia |
| DOIs | |
| Publication status | Accepted/In press - Feb 2 2018 |
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ASJC Scopus subject areas
- Hematology
- Cancer Research
- Anesthesiology and Pain Medicine
Cite this
Epigenetic heterogeneity affects the risk of relapse in children with t(8;21)RUNX1-RUNX1T1-rearranged AML. / Zampini, Matteo; Tregnago, Claudia; Bisio, Valeria; Simula, Luca; Borella, Giulia; Manara, Elena; Zanon, Carlo; Zonta, Francesca; Serafin, Valentina; Accordi, Benedetta; Campello, Silvia; Buldini, Barbara; Pession, Andrea; Locatelli, Franco; Basso, Giuseppe; Pigazzi, Martina.
In: Leukemia, 02.02.2018, p. 1-11.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Epigenetic heterogeneity affects the risk of relapse in children with t(8;21)RUNX1-RUNX1T1-rearranged AML
AU - Zampini, Matteo
AU - Tregnago, Claudia
AU - Bisio, Valeria
AU - Simula, Luca
AU - Borella, Giulia
AU - Manara, Elena
AU - Zanon, Carlo
AU - Zonta, Francesca
AU - Serafin, Valentina
AU - Accordi, Benedetta
AU - Campello, Silvia
AU - Buldini, Barbara
AU - Pession, Andrea
AU - Locatelli, Franco
AU - Basso, Giuseppe
AU - Pigazzi, Martina
PY - 2018/2/2
Y1 - 2018/2/2
N2 - The somatic translocation t(8;21)(q22;q22)/RUNX1-RUNX1T1 is one of the most frequent rearrangements found in children with standard-risk acute myeloid leukemia (AML). Despite the favorable prognostic role of this aberration, we recently observed a higher than expected frequency of relapse. Here, we employed an integrated high-throughput approach aimed at identifying new biological features predicting relapse among 34 t(8;21)-rearranged patients. We found that the DNA methylation status of patients who suffered from relapse was peculiarly different from that of children maintaining complete remission. The epigenetic signature, made up of 337 differentially methylated regions, was then integrated with gene and protein expression profiles, leading to a network, where cell-to-cell adhesion and cell-motility pathways were found to be aberrantly activated in relapsed patients. We identified most of these factors as RUNX1-RUNX1T1 targets, with Ras Homolog Family Member (RHOB) overexpression being the core of this network. We documented how RHOB re-organized the actin cytoskeleton through its downstream ROCK–LIMK–COFILIN axis: this increases blast adhesion by stress fiber formation, and reduces mitochondrial apoptotic cell death after chemotherapy treatment. Altogether, our data show an epigenetic heterogeneity within t(8;21)-rearranged AML patients at diagnosis able to influence the program of the chimeric transcript, promoting blast re-emergence and progression to relapse.
AB - The somatic translocation t(8;21)(q22;q22)/RUNX1-RUNX1T1 is one of the most frequent rearrangements found in children with standard-risk acute myeloid leukemia (AML). Despite the favorable prognostic role of this aberration, we recently observed a higher than expected frequency of relapse. Here, we employed an integrated high-throughput approach aimed at identifying new biological features predicting relapse among 34 t(8;21)-rearranged patients. We found that the DNA methylation status of patients who suffered from relapse was peculiarly different from that of children maintaining complete remission. The epigenetic signature, made up of 337 differentially methylated regions, was then integrated with gene and protein expression profiles, leading to a network, where cell-to-cell adhesion and cell-motility pathways were found to be aberrantly activated in relapsed patients. We identified most of these factors as RUNX1-RUNX1T1 targets, with Ras Homolog Family Member (RHOB) overexpression being the core of this network. We documented how RHOB re-organized the actin cytoskeleton through its downstream ROCK–LIMK–COFILIN axis: this increases blast adhesion by stress fiber formation, and reduces mitochondrial apoptotic cell death after chemotherapy treatment. Altogether, our data show an epigenetic heterogeneity within t(8;21)-rearranged AML patients at diagnosis able to influence the program of the chimeric transcript, promoting blast re-emergence and progression to relapse.
UR - http://www.scopus.com/inward/record.url?scp=85042371218&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85042371218&partnerID=8YFLogxK
U2 - 10.1038/s41375-017-0003-y
DO - 10.1038/s41375-017-0003-y
M3 - Article
AN - SCOPUS:85042371218
SP - 1
EP - 11
JO - Leukemia
JF - Leukemia
SN - 0887-6924
ER -