NSD2 Overexpression in Multiple Myeloma May Drive Immune Evasion, New Research Suggests
核心洞察
Researchers at the University of Florida have discovered that NSD2 (搜索) overexpression in multiple myeloma (搜索) cells leads to secretion of factors that suppress MHC class II molecules on immune cells, potentially enabling tumor immune evasion.
NSD2 (搜索), a histone methyltransferase frequently overexpressed in patients with t(4;14) translocation, affects cell metabolism and alters metabolite secretion patterns that may inhibit immune system function.
The research team is developing mouse models to validate their in vitro findings, with plans to test selective NSD2 (搜索) inhibitors as potential therapeutic agents to restore immune function and enhance antitumor responses.
Researchers at the University of Florida College of Medicine have uncovered new evidence suggesting that NSD2 (搜索), a histone methyltransferase gene, may play a significant role in immune evasion in multiple myeloma (搜索), potentially explaining the aggressive nature of certain disease subtypes and opening avenues for targeted therapeutic approaches.
The findings, presented at the 2025 AACR Annual Meeting, demonstrate that NSD2 (搜索) overexpression—which occurs in approximately 15% of multiple myeloma (搜索) patients harboring t(4;14) translocations—leads to secretion of factors that suppress MHC class II molecules on immune cells, potentially creating an immunosuppressive tumor microenvironment.
"Our major finding so far is that we noticed that NSD2 (搜索) over-expressing cells result in cells secreting something that can suppress MHC class II molecules on immune cells, and we believe that this will have immunosuppressive effects in an in vivo environment," explained Dr. Amin Sobh, research assistant professor in the Division of Hematology/Oncology at the University of Florida College of Medicine.
Metabolic Changes and Immune Suppression
Through multiomics analysis of isogenic t(4;14) multiple myeloma (搜索) cell lines with varying NSD2 (搜索) expression levels, Dr. Sobh's team discovered that NSD2 overexpression significantly alters cellular metabolism and metabolite secretion patterns. Specifically, cells with elevated NSD2 levels secrete metabolites that inhibit immune function while simultaneously reducing production of metabolites that would normally stimulate immune responses.
Flow cytometry experiments provided further evidence of NSD2 (搜索)'s immunomodulatory effects, showing that both genetic and pharmacological disruption of NSD2 increased MHC-II expression levels. Additionally, cytokine profiling revealed that NSD2 inhibition suppressed production of interleukin-10, a known suppressor of MHC-II expression.
These findings suggest that NSD2 (搜索) may contribute to the aggressiveness of multiple myeloma (搜索) not only through its established role in driving oncogenic transcriptional programs but also by helping tumor cells evade immune surveillance.
Moving Toward In Vivo Validation
Having established compelling in vitro evidence, the research team is now working to develop mouse models to validate their findings in vivo.
"We have done a lot of the in vitro components, but the next step would be working in a mouse model," Dr. Sobh noted. "We're trying to optimize the conditions. We had some challenges overexpressing NSD2 (搜索) in mouse cells, but we're heading toward success with this model."
The team plans to use MOPC315.BM multiple myeloma (搜索) mouse models to further demonstrate NSD2 (搜索)'s effects on immune response. Once validated, these models will allow researchers to examine how NSD2-driven changes in myeloma cells affect immune recognition and clearance in a living system.
Therapeutic Implications
The identification of NSD2 (搜索) as a potential mediator of immune evasion in multiple myeloma (搜索) presents an intriguing therapeutic opportunity. Dr. Sobh and colleagues plan to evaluate the efficacy of NSD2 inhibition in their in vivo models, testing a selective NSD2 inhibitor (搜索) currently in clinical development.
"We want to determine whether pharmacologic targeting of NSD2 (搜索) can restore immune function and enhance antitumor responses," Dr. Sobh explained. These investigations will also assess downstream effects on immune cell activation and cytokine production.
Clinical Context
Multiple myeloma (搜索) remains an incurable blood cancer with significant unmet medical needs, particularly for patients with high-risk genetic features such as the t(4;14) translocation. These patients typically experience more aggressive disease progression and poorer responses to standard therapies.
The t(4;14) translocation, present in approximately 15% of newly diagnosed multiple myeloma (搜索) cases, places the NSD2 (搜索) gene under the control of a strong immunoglobulin enhancer, resulting in its overexpression. This genetic alteration has long been recognized as a poor prognostic factor, but the mechanisms underlying its association with aggressive disease have not been fully elucidated.
By uncovering NSD2 (搜索)'s potential role in immune evasion, this research provides new insights into the biology of high-risk multiple myeloma (搜索) and suggests that targeting NSD2 could potentially address both the intrinsic oncogenic properties of myeloma cells and their interactions with the immune microenvironment.
As research progresses from in vitro studies to in vivo models and potentially clinical trials, NSD2 (搜索) inhibition may emerge as a promising strategy for improving outcomes in patients with this challenging subtype of multiple myeloma (搜索).