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Revealing and harnessing CD39 for the treatment of colorectal cancer and liver metastases by engineered T cells [CRC]

ABSTRACT: Colorectal tumors are often densely infiltrated by immune cells that have a role in surveillance and modulation of tumor progression but are burdened by exhaustion mechanisms fueled by the tumor microenvironment, which must be counteracted to achieve control. Here, we deployed a multidimensional approach to unravel the T cell functional landscape in tumor and peritumoral tissues from primary colorectal cancers and liver metastases. We found that T-cells are mainly localized at the front edge and that tumor-infiltrating T cells co-express multiple inhibitory receptors and highlighted CD39 as the major driver of exhaustion in both primary and metastatic colorectal tumors. By CRISPR/Cas9 genome editing tools, we simultaneously redirected T-cell specificity employing a novel T-cell receptor targeting the HER-2 antigen, and disrupted CD39, thus generating triple-knockout engineered lymphocytes. We showed that the absence of CD39 confers HER2-specific T cells a functional advantage in eliminating HER2+ patient-derived organoids, starring the relevance of the CD39 axis for further exploitation in adoptive T-cell therapy strategies to treat primary and metastatic colorectal cancer.

ORGANISM(S): Homo sapiens

PROVIDER: GSE200130 | GEO | 2023/07/12

REPOSITORIES: GEO

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Revealing and harnessing CD39 for the treatment of colorectal cancer and liver metastases by engineered T cells [NanoString]

Project description:Colorectal tumors are often densely infiltrated by immune cells that have a role in surveillance and modulation of tumor progression but are burdened by exhaustion mechanisms fueled by the tumor microenvironment, which must be counteracted to achieve control. Here, we deployed a multidimensional approach to unravel the T cell functional landscape in tumor and peritumoral tissues from primary colorectal cancers and liver metastases. We found that T-cells are mainly localized at the front edge and that tumor-infiltrating T cells co-express multiple inhibitory receptors and highlighted CD39 as the major driver of exhaustion in both primary and metastatic colorectal tumors. By CRISPR/Cas9 genome editing tools, we simultaneously redirected T-cell specificity employing a novel T-cell receptor targeting the HER-2 antigen, and disrupted CD39, thus generating triple-knockout engineered lymphocytes. We showed that the absence of CD39 confers HER2-specific T cells a functional advantage in eliminating HER2+ patient-derived organoids, starring the relevance of the CD39 axis for further exploitation in adoptive T-cell therapy strategies to treat primary and metastatic colorectal cancer.

2023-07-12 | GSE200131 | GEO

Revealing and harnessing CD39 for the treatment of colorectal cancer and liver metastases by engineered T cells [mCRC]

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CD39+ CD4+ conventional T cells with exhaustion traits and cytotoxic potential infiltrate tumors and expand upon CTLA4 blockade

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2024-01-01 | GSE221881 | GEO

CD39 expression identifies terminally exhausted CD8+ T cells

Project description:Exhausted T cells express multiple co-inhibitory molecules that impair their function and limit immunity to chronic viral infection. Defining novel markers of exhaustion is important both for identifying and potentially reversing T cell exhaustion. Herein, we show that the ectonucleotidse CD39 is a marker of exhausted CD8+ T cells. CD8+ T cells specific for HCV or HIV express high levels of CD39, but those specific for EBV and CMV do not. CD39 expressed by CD8+ T cells in chronic infection is enzymatically active, co-expressed with PD-1, marks cells with a transcriptional signature of T cell exhaustion and correlates with viral load in HIV and HCV. In the mouse model of chronic Lymphocytic Choriomeningitis Virus infection, virus-specific CD8+ T cells contain a population of CD39high CD8+ T cells that is absent in functional memory cells elicited by acute infection. This CD39high CD8+ T cell population is enriched for cells with the phenotypic and functional profile of terminal exhaustion. These findings provide a new marker of T cell exhaustion, and implicate the purinergic pathway in the regulation of T cell exhaustion. CD8+ T cells from subjects with HCV infection were sorted and pelleted and re-suspended in TRIzol (Invitrogen). RNA extraction was performed using the RNAdvance Tissue Isolation kit (Agencourt). Concentrations of total RNA were determined with a Nanodrop spectrophotometer or Ribogreen RNA quantification kits (Molecular Probes/Invitrogen). RNA purity was determined by Bioanalyzer 2100 traces (Agilent Technologies). Total RNA was amplified with the WT-Ovation Pico RNA Amplification system (NuGEN) according to the manufacturer's instructions. After fragmentation and biotinylation, cDNA was hybridized to HG-U133A 2.0 microarrays (Affymetrix).

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CD39 Identifies Tumor-Reactive CD8 T cells in Patients With Lung Cancer [VDJ]

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CD39 Identifies Tumor-Reactive CD8 T cells in Patients With Lung Cancer [FB]

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CD39 expression identifies terminally exhausted CD8+ T cells

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RNA-Seq of FACS-sorted, KIR-CD39-,KIR+CD39- and KIR+CD39+, Uterine NK cells (uNK cells) from human decidual samples

Project description:Uterine NK cells (uNK cells) form a distinct immune cell population in the endometrium and decidua. Here, we FACS-sorted KIR-CD39-,KIR+CD39- and KIR+CD39+ uNK cells from decidual samples.

2021-02-19 | E-MTAB-8709 | biostudies-arrayexpress

A Population of Tumor-Infiltrating CD4+ T-cells Co-expressing CD38 and CD39 is Associated with Checkpoint Inhibitor Resistance

Project description:We previously showed that elevated peripheral blood frequencies of a population of T-cells defined by the marker set CD3+CD4+CD127-GARP-CD38+CD39+ were associated with checkpoint immunotherapy resistance in metastatic melanoma patients. In this study we sought to further understand the role(s) of this population of ectoenzyme expressing T-cells (Teee). Using RNA-sequencing and flow cytometry to evaluate Teee from the peripheral blood of metastatic melanoma patients, we found that Teee were proliferative, apoptotic, had exhaustion associated phenotypes, and had high expression of inhibitory molecules. Co-culture of patient Teee with autologous T-cells in vitro resulted in suppression of proliferation of the target T-cells. Using single-cell RNA-sequencing datasets, we identified distinct clusters of cells with a Teee gene signature present in melanoma, non-small cell lung cancer and bladder cancer patients’ tumors. Teee were not present in healthy bladder tissue. Using multispectral immunofluorescence of melanoma patient FFPE tumor samples, we were able to identify CD4+ T-cells co-expressing CD38 and CD39 in the tumor microenvironment, which preferentially associated with Ki67- CD8+ T-cells. Finally, we found that high baseline intra-tumor frequencies of cells with a Teee gene signature were associated with checkpoint immunotherapy resistance and poor overall survival in metastatic melanoma patients. These results build upon our previous findings, demonstrating that a novel population of CD4+ T-cells co-expressing CD38 and CD39 are found in the periphery and tumor of patients and are associated with checkpoint immunotherapy resistance.

2023-07-17 | GSE224099 | GEO

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