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The coenzyme A precursor pantethine restrains sarcoma growth through promotion of type 1 immunity

ABSTRACT: The tumor microenvironment is a dynamic network of stromal, cancer and immune cells that interact and compete for resources. Mitochondria play an essential role in the control of metabolic plasticity and contribute to tumor progression and immune cell functionality. We previously identified the Vanin1 pathway as a tumor suppressor of sarcoma development via vitamin B5 and coenzyme A regeneration. Using an aggressive sarcoma cell line that lacks Vnn1 expression, we showed that administration of pantethine, a vitamin B5 precursor, impairs tumor growth in immunocompetent mice. Pantethine boosts anti-tumor type 1 immunity including polarization of myeloid and dendritic cells towards enhanced IFNγ-driven antigen presentation pathways and improved development of hypermetabolic effector CD8+ T cells endowed with potential anti-tumor activity. At later stages of treatment, the effect of pantethine is limited by the development of immune cell exhaustion. Nevertheless, its activity is comparable to that of anti-PD1 treatment in sensitive tumors. In humans, VNN1 expression correlates with improved survival and immune cell infiltration in soft tissue sarcomas but not osteosarcomas. Pantethine could be a potential therapeutic immunoadjuvant for the development of anti-tumor immunity.

ORGANISM(S): Mus musculus

PROVIDER: GSE221164 | GEO | 2023/10/09

REPOSITORIES: GEO

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Expression data from mouse sarcoma tumor cell lines

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Project description:We compared the transcriptional signatures of the colonic mucosa from control mice (WT) versus mice deficient for the epithelial pantetheinase Vnn1 (Vnn1KO) or overexpressing Vnn1 specifically in intestinal epithelial cells (VIVA transgenic mice), during the development of DSS-induced colitis.

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EWS-FLI1-induced osteosarcoma model unveiled a crucial role of impaired osteogenic differentiation on osteosarcoma development [gene expression]

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2016-03-01 | E-GEOD-72704 | biostudies-arrayexpress

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2016-01-15 | E-GEOD-76889 | biostudies-arrayexpress

Vitamin B6 metabolism determines T cell anti-tumor responses

Project description:Vitamin B6 metabolism determines T cell anti-tumor responses

| PRJNA758697 | ENA

Thioredoxin-1 Alters Anti-Tumor T Cell Immuno-Metabolic Phenotype

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2021-12-20 | E-MTAB-7571 | biostudies-arrayexpress

Vitamin B6 metabolism determines T cell anti-tumor responses

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Project description:The tumor microenvironment plays a crucial role in soft tissue sarcoma development and response to therapy. We used single cell RNA sequencing to analyze the malignant, immune, and other stromal cells present within soft tissue sarcomas.

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