Areas of Research

Epigenetic regulation of myeloma

Multiple myeloma is in many ways a disease driven by inappropriate gene expression. It is characterised by the aberrant activation of gene regulatory elements known as enhancers, stimulating the upregulation of key oncogenes. Blocking this behaviour is therefore a promising strategy for myeloma treatment, and many therapeutic strategies directly or indirectly target gene regulatory pathways.

The lab studies the epigenetic regulation of gene expression, focused on the way these processes are dysregulated in multiple myeloma. We have a particular interest in understanding the role of oncogenic enhancer activity in driving myeloma-specific transcriptional profiles, and identifying the factors responsible for this behaviour. A major goal of the lab is to identify potential therapeutic targets that could be developed as novel therapies for multiple myeloma.

We use a variety of high-throughput genomics techniques to study the chromatin landscape, including ChIP-seq, ATAC-seq and RNA-seq. We have optimised TOPmentation, a small cell-number technique that allows us to characterise the chromatin profile of myeloma patient samples. In addition, we use the 3C technology Micro-Capture-C to map the physical association of enhancers and promoters. By combining these techniques with genetic and pharmacological manipulation of myeloma cell lines, we are able to explore mechanistically enhancer function and regulation.

Mechanisms of myeloma drug resistance

Relapse is very common in myeloma after initial treatment. Patients typically enter remission following treatment, but invariably relapse, often with resistance to one or more of these drugs. There is therefore a pressing need to understand the mechanisms that drive this resistance to find ways to counteract it. We are working to identify and understand epigenetic mechanisms that drive drug resistance via changes in gene expression, which therefore may be reversed to resensitise cells to therapy.

Our team

Jinglin Zhou (he/him)

Jinglin Zhou (he/him)
PhD student

Jason Taslim (he/him)

Jason Taslim (he/him)
Research assistant

Sophie Ball (she/her)

Sophie Ball (she/her)
PhD student

Funders

Research Publications

Citation

BibTex format

@article{Sabbattini:2026:10.1182/blood.2026033534,
author = {Sabbattini, PMR and Trasanidis, N and Taslim, J and Whitwell, H and Huang, Y and Caputo, VS and Ng, HL and Chaidos, A and Fordwor-Hepburn, K and Jia, Q and Katsarou, A and Atta, M and Bua, M and Ros-Soto, J and Roberts, I and Feldhahn, N and Crump, N and Karadimitris, A},
doi = {10.1182/blood.2026033534},
journal = {Blood Journal},
title = {CXXC1-dependent IRF4 activity promotes myeloma cell fitness and sustains lenalidomide resistance},
url = {http://dx.doi.org/10.1182/blood.2026033534},
year = {2026}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Regulation of oncogenic transcriptional programs in multiple myeloma requires the interplay of histone modifications, their writers and readers with lineage-affiliated transcription factors. The transcription factors IKZF1/3, IRF4 and MYC form an aberrant, myeloma-specific regulatory loop that drives myelomagenesis and resistance to immunomodulatory drugs (IMiDs) such as lenalidomide. Chromatin-based mechanisms that regulate these processes remain incompletely understood. Here we investigate the role of CXXC1, a core component of the H3K4 methyltransferase complex COMPASS, in the activity of the IKZF1/3-IRF4-MYC regulatory loop. We find that clinically, high CXXC1 expression is associated with high-risk proliferative, adverse prognosis disease. Consistent with this, CXXC1 is a myeloma dependency and it regulates cellular fitness programs including cell cycle, MYC targets and DNA damage response. High CXXC1 expression in primary myeloma cells is associated with higher chromatin accessibility, while acute depletion of degron-tagged CXXC1 further validates its role in regulating myeloma cell fitness programs and high-risk transcriptional signatures. CXXC1 interacts with and extensively co-binds to chromatin with IRF4 and IKZF3. Notably, in both lenalidomide-sensitive and -resistant myeloma cells, CXXC1 depletion results in loss of IRF4 and IKZF3 chromatin binding and in parallel it 'breaks' the IRF4 transcriptional self-regulatory loop. Thus, CXXC1 and COMPASS emerge as novel therapeutic targets in IMiD-sensitive and -resistant myeloma by regulating the activity of IRF4 and essential myeloma cell fitness programs.
AU - Sabbattini,PMR
AU - Trasanidis,N
AU - Taslim,J
AU - Whitwell,H
AU - Huang,Y
AU - Caputo,VS
AU - Ng,HL
AU - Chaidos,A
AU - Fordwor-Hepburn,K
AU - Jia,Q
AU - Katsarou,A
AU - Atta,M
AU - Bua,M
AU - Ros-Soto,J
AU - Roberts,I
AU - Feldhahn,N
AU - Crump,N
AU - Karadimitris,A
DO - 10.1182/blood.2026033534
PY - 2026///
SN - 0006-4971
TI - CXXC1-dependent IRF4 activity promotes myeloma cell fitness and sustains lenalidomide resistance
T2 - Blood Journal
UR - http://dx.doi.org/10.1182/blood.2026033534
UR - https://doi.org/10.1182/blood.2026033534
ER -