Dataset Information

An engineered IL-2 partial agonist promotes CD8+ T cell stemness

ABSTRACT: Adoptive transfer of antigen-specific T cells represents a major advance in cancer immunotherapy, with robust clinical outcomes in some patients . Both the number of transferred T cells and their differentiation state are critical determinants of effective responses. T cells can be expanded with T cell receptor (TCR)-mediated stimulation and interleukin-2, but this can lead to differentiation into effector T cells and lower therapeutic efficacy, whereas maintenance of a more stem-cell-like state before adoptive transfer is beneficial. Here we show that H9T, an engineered interleukin-2 partial agonist, promotes the expansion of T cells without driving terminal differentiation. H9T led to altered STAT5 signalling and mediated distinctive downstream transcriptional, epigenetic and metabolic programs. In addition, H9T sustained the expression of T cell transcription factor 1 (TCF-1) and promoted mitochondrial fitness, thereby facilitating the maintenance of a stem-cell-like state. Moreover, TCR-transgenic and chimeric antigen receptor-modified CD8+ T cells that were expanded with H9T showed robust anti-tumour activity in vivo in models of melanoma and acute lymphoblastic leukaemia. Thus, using engineered cytokine variants with distinctive properties is a promising strategy, with broad translational potential.

ORGANISM(S): Mus musculus Homo sapiens

PROVIDER: GSE138698 | GEO | 2021/07/06

REPOSITORIES: GEO

ACCESS DATA

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Project description:The optimal T cell attributes for the adoptive immunotherapy of cancer and viral diseases are currently unclear. Recent adoptive transfer clinical trials using ex vivo expanded tumor infiltrating lymphocytes has provided evidence that differentiated effector T cells can mediate durable responses in selected cancer patients. The capacity of these transferred cells to persist in the host was found to strongly correlate with their clinical activity. Thus, there is significant interest in identifying intrinsic markers that define antigen specific effector T cells that can develop into long-lived memory cells rather than undergoing apoptosis after infusion in humans. We recently reported the long term persistence of ex vivo expanded tumor specific CD8+ T effector clones in refractory metastatic melanoma patients after adoptive T cell transfer. By utilizing these highly homogeneous clone populations, we sought to define the pre-infusion cellular and molecular attributes associated with their effector to memory transition. Comparative transcriptional profiling found the pre-infusion clone mRNA expression levels of the IL-7 receptor (IL-7Ra) and the proto-oncogene, c-myc, directly correlated with the level of clonal persistence after adoptive transfer in humans. The predictive value of these markers was further established by utilizing IL-7R protein, induced pSTAT5, and c-myc mRNA expression to prospectively identify human tumor specific effector clones that could engraft after controlled adoptive transfer into highly immunodeficient mice. These findings support that IL-7R and c-myc expression are valuable cell intrinsic markers that can predict the fate of effector CD8+ T cells after adoptive transfer. We used microarrays to compare the pre-infusion gene expression profile of melanoma-specific CD8+ T cell clones that would eventually either persist or not after adoptive transfer in humans. We derived ten melanoma-specific CD8+ T cell clones and determined their degree of persistence after adoptive therapy into patients. We performed microarray on the pre-infusion samples of six persisting and four non-persisting clones to obtain a comparative gene signature profile.

Dataset Information

An engineered IL-2 partial agonist promotes CD8+ T cell stemness

Dataset's files

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets