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FOXM1 is prevalent in lung cancer and targetable via T cell receptor engineering

ABSTRACT: We identified epitopes derived from FOXM1 which were immunogenic on HLA-A*02:01, HLA-A*24:02, and HLA-A*23:01, endogenously-processed and presented, and resulted in T cell activation and cytotoxic T cell responses. Following the generation of TCR-T cells, sensitivity and specificity were confirmed by peptide dose-response and X-scan, respectively. Most importantly, adoptive transfer of TCR engineered T cells led to a significant reduction in tumor growth, as well as significantly prolonged survival in NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ (NSG) tumor-bearing murine model. Our studies confirm the immunogenicity of FOXM1 and feasibility of targeting this antigen using TCR-engineering.

ORGANISM(S): Homo sapiens

PROVIDER: GSE319956 | GEO | 2026/03/11

REPOSITORIES: GEO

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Identification of FOXM1 Epitopes in Lung Cancer

Project description:FOXM1 is highly expressed in various cancer types and considered a key driver of cancer progression. Accordingly, we evaluated the immunogenicity of FOXM1 and investigated the feasibility of targeting this transcription factor using T cell receptor (TCR) engineering. We identified epitopes derived from FOXM1 which were immunogenic on HLA-A*02:01, HLA-A*24:02, and HLA-A*23:01, endogenously-processed and presented, and resulted in T cell activation and cytotoxic T cell responses. Following the generation of TCR-T cells, sensitivity and specificity were confirmed by peptide dose-response and X-scan, respectively. Most importantly, adoptive transfer of TCR engineered T cells led to reduced tumor growth and prolonged survival in NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ (NSG) strain murine models bearing FOXM1 expressing subcutaneous tumors. Our studies confirm the immunogenicity of FOXM1 and feasibility of targeting this tumor-associated antigen using TCR-engineering.

2026-02-18 | PXD073612 | Pride

A single-cell RNA-sequencing time course of liver colonisation by colorectal cancer metastases

Project description:Murine colorectal cancer cells were injected into the portal vein of NOD.Cg-PrkdcSCID Il2rgtm1Wjl/SzJ mice. Liver metastatic cells were harvested at specific time points for single-cell RNA-sequencing (SORT-seq).

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Project description:Human salispheres, a culture of stem/progenitor cells, represent a potential therapy for radiation induced hyposalivation. Radiation-induced hyposalivation dramatically reduces quality of life of patients. We have demonstrated the potential of human salispheres to engraft and differentiate when transplanted into a mouse model of hyposalivation, in the manuscript associated with these data. We also demonstrate the functional recovery of irradiated salivary glands (SGs) following human salisphere transplantation, by the measurement of saliva production. We previously employed Illumina microarrays to determine if transplanted human salisphere cells exert a paracrine stimulatory effect on recipient mouse SGs. Results of this array unveiled a large cohort of immuneresponse genes unregulated following human salisphere transplantation. In order to negate this immune response and unveil any true paracrein stimulatory effects, we performed autologous transplantation of salispheres from NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ (NSG) mice, the same model employed in our first microarray study, in the irradiated SGs of NSG mice. 6 samples were analysed in total. Total RNA from 3 irradiated control SGs (5Gy irradiation) and 3 salivary glands transplanted with 100,000 NSG salispheres.

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Project description:T-cell based therapies have shown remarkable efficacy in multiple myeloma (MM), yet the disease remains largely incurable. Here, we investigated the constant domains of the immunoglobulin heavy chain (IgH) as novel targets for therapeutic T-cell receptors (TCRs), after confirming high and homogeneous IGH expression in >95% of MM patients. MM cells secrete excessive monoclonal immunoglobulins (M-proteins) that drive complications but are inaccessible to CAR T-cell or antibody targeting. Peptides from IgA and IgG constant regions were eluted from HLA-A*02:01, and reactive TCRs were isolated from healthy donors using allo-HLA-A*02:01 presentation to circumvent self-tolerance. T cells engineered with two TCRs specific for IgA or IgG passed a stringent multi-tier safety screen and selectively eliminated MM cells from 20 HLA-A*02:01+ patients secreting the relevant IgH in vitro. In vivo, IgA-TCR T cells eradicated IgA+HLA-A*02:01+ MM cells in xenograft models and reduced circulating IgA in humanized PBMC mice. These findings establish immunoglobulin constant domains as viable TCR targets in MM, potentially making ~40% of patients of European descent eligible for TCR T cell therapy, and extension to additional HLA alleles could further broaden eligibility. The approach may also be applicable to lymphoma and antibody-mediated autoimmune diseases.

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Paracrine stimulation effect of autologous salispheres on mouse salivary gland

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Osteoblasts secrete miRNA-containing extracellular vesicles that enhance expansion of human umbilical cord blood cells

Project description:Osteolineage cells represent one of the critical bone marrow niche components that support maintenance of hematopoietic stem and progenitor cells (HSPCs). Recent studies demonstrate that extracellular vesicles (EVs) regulate stem cell development via horizontal transfer of bioactive cargo, including microRNAs (miRNAs). Here, we characterize the miRNA profile of EVs secreted by human osteoblasts and study their biological effect of on human umbilical cord blood-derived CD34+ HSPCs by sequencing, gene expression and biochemical analyses. Using next-generation sequencing we show that osteoblast-derived EVs contain highly abundant miRNAs specifically enriched in EVs, including critical regulators of hematopoietic proliferation (e.g., miR-29a). EV treatment of CD34+ HSPCs alters the expression of candidate miRNA targets, such as HBP1, BCL2 and PTEN. Furthermore, EVs enhance proliferation of CD34+ cells and their immature subsets in growth factor-driven ex vivo expansion cultures. Importantly, EV-expanded cells retain their differentiation capacity in vitro and show successful engraftment in NOD.Cg-Prkdcscid Il2rgtm1Wjl/SzJ (NSG) mice in vivo. These discoveries reveal a novel osteoblast-derived EV-mediated mechanism for regulation of HSPC proliferation and warrant consideration of EV-miRNAs for the development of expansion strategies to treat hematological disorders.

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