Single-cell transcriptomic sequencing identifies the genes related to polyfunctionality of persistent CAR-T cells targeting B7-H3 (CD276) in mice bearing human neuroblastoma xenografts
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ABSTRACT: To understand the molecular determinants of B12(VHH)-CAR-T polyfunctionality, we simultaneously measured the protein and RNA expression levels of 95 single CD4+ B12(VHH)-CAR-T cells isolated from IMR5 tumor-bearing mouse and re-stimulated with IMR5 tumor cells in vitro. We identified two CAR-T clusters, low polyfunctionality and high polyfunctionality subsets, in a 2D t-SNE plot. Moreover, our single-cell mRNA expression profiling revealed 32 genes that displayed statistically significant, concordant differences between the two cell subsets.
Project description:To understand the molecular determinants of CAR-T cell polyfunctionality, we simultaneously measured the protein and RNA expression levels of 23 single CD8+ D4-IgG4H-CD28TM CAR T cells targeting GPC1 stimulated with T3M4 pancreatic cancer cells. We identified two CAR-T clusters, low polyfunctionality and high polyfunctionality subsets, in a 2D t-SNE plot. Moreover, our single-cell mRNA expression profiling revealed 23 genes that displayed statistically significant, concordant differences between the two cell subsets.
Project description:Immunotherapy aiming at suppressing tumor development by relying on modifying or strengthening the immune system prevails among cancer treatments and points out a new direction for cancer therapy. B7 homolog 3 protein (B7-H3, also known as CD276), a newly identified immunoregulatory protein member of the B7 family, is an attractive and promising target for cancer immunotherapy because it is overexpressed in tumor tissues while showing limited expression in normal tissues and participating in tumor microenvironment (TME) shaping and development. Thus far, numerous B7-H3-based immunotherapy strategies have demonstrated potent antitumor activity and acceptable safety profiles in preclinical models. Herein, we present the expression and biological function of B7-H3 in distinct cancer and normal cells, as well as B7-H3-mediated signal pathways in cancer cells and B7-H3-based tumor immunotherapy strategies. This review provides a comprehensive overview that encompasses B7-H3's role in TME to its potential as a target in cancer immunotherapy.
Project description:Single-cell transcriptomic sequencing identifies the genes related to polyfunctionality of persistent CAR-T cells targeting B7-H3 (CD276) in mice bearing human neuroblastoma xenografts
Project description:Polyfunctional T cell responses are detrimental in immune disorders; however, it is unclear how effector T cell subsets acquire polyfunctionality in tissues. Here, we demonstrate that the activation of Nrf2 is necessary for the differentiation polyfunctional Th2 cells in vivo. Reactive oxygen species (ROS) levels are significantly elevated in lung-infiltrating immune cells during allergic asthma, and inhibiting either ROS or Nrf2 significantly decreases eosinophilia and polyfunctional Th2 cells in the lung. In vivo studies using multiple cell-type specific Nrf2-deficient mice and mixed bone marrow chimeras revealed that cell-intrinsic Nrf2 drives IL-5 and IL-13 expression in Th2 cells independently of IL-33. Mechanistically, Nrf2 promotes optimal OXPHOS and glycolysis capacity by inducing PPARg expression and glucose uptake to drive polyfunctionality of Th2 cells. Blocking Nrf2 reduces IL-5 and IL-13 production from house dust mite allergen-specific Th2 cells obtained from asthma patients. These findings demonstrate that Nrf2 acts as a spatiotemporal metabolic hub driving the differentiation of polyfunctional Th2 cells, which may have therapeutic implications for controlling allergic lung inflammation.
Project description:B7-H3 (CD276), a member of the family of immune modulators, orchestrates antitumor immunity. To date, only small-sized studies have examined the association of B7-H3 expression with survival in pancreatic cancer, yielding inconclusive results. We evaluated tumor B7-H3 expression in 150 consecutive patients with pancreatic ductal adenocarcinoma using immunohistochemistry. B7-H3 expression was positive (≥10% tumor cells) in 99 of 150 (66%) cases of pancreatic cancer. We classified the tumors into four groups depending on B7-H3 expression (negative, low, intermediate, and high) and found that higher B7-H3 expression was independently associated with lower disease-free survival (DFS; for high vs. negative B7-H3 expression: multivariable hazard ratio (HR) = 3.12; 95% confidence interval (CI) = 1.48?6.15; Ptrend = 0.0026). Furthermore, the association of B7-H3 expression with survival differed according to the pathological stage (p-stage) (Pinteraction = 0.048, between p-stages I?II and III?IV). The association of B7-H3 positivity with lower DFS was stronger in tumors with p-stage I?II (multivariable HR = 3.10, 95% CI = 1.75?5.69; P < 0.0001) than in those with p-stage III?IV (multivariable HR = 1.20, 95% CI = 0.67?2.28; P = 0.55). We demonstrated that tumor high B7-H3 expression is independently associated with poor survival in patients with pancreatic cancer and that this association is stronger in tumors with p-stage I?II than in those with p-stage III?IV. B7-H3 expression may be a useful prognostic biomarker for identifying aggressive early-stage pancreatic cancer.
Project description:BackgroundAdrenocortical carcinoma (ACC) is a rare malignant endocrine tumor with a high tumor recurrence rate and poor postoperative survival. Recent studies suggest that CD276- (B7-H3) targeted therapy represents a promising therapeutic option for solid tumors. However, little is known about the expression status of CD276 or its association with progression and prognosis of ACC.MethodsClinical data were retrospectively analyzed from patients who underwent resection of ACC at our institution (n = 48). Archived, formalin-fixed, and paraffin-embedded samples were collected for immunohistochemical analysis, and the correlation between CD276 expression and clinicopathological parameters was evaluated. Kaplan-Meier and univariate/multivariate Cox regression methods were implemented to identify any prognostic effects. Data from The Cancer Genome Atlas (TCGA) ACC cohort (n = 48). Archived, formalin-fixed, and paraffin-embedded samples were collected for immunohistochemical analysis, and the correlation between CD276 expression and clinicopathological parameters was evaluated. Kaplan-Meier and univariate/multivariate Cox regression methods were implemented to identify any prognostic effects. Data from The Cancer Genome Atlas (TCGA) ACC cohort (.ResultsPositive expression of CD276 was detected on the cell membrane and in the cytoplasm of cancer cells or tumor-associated vascular cells in 91.67% (44/48) of ACCs. Vascular expression of CD276 was associated with local aggression (higher T stage, P = 0.029) and advanced ENSAT stage (P = 0.029) and advanced ENSAT stage (P = 0.029) and advanced ENSAT stage (P = 0.029) and advanced ENSAT stage (P = 0.029) and advanced ENSAT stage (P = 0.029) and advanced ENSAT stage (.ConclusionThese findings highlight the immune checkpoint factor CD276 as an independent prognostic factor and a potential therapeutic target in ACC.
Project description:CAR-T cell costimualtory domains can alter CAR-T cell phenotypes. We therefore performed RNA sequencing to understand the effect of TMIGD2 vs CD28.4-1BB comstimulation in B7-H3 CAR-T cells after in vitro coculture.
Project description:The immune checkpoint B7-H3 (CD276) is a member of the B7 family that has been studied in the tumor microenvironment and immunotherapy, but its potential role in metabolism remains largely unknown. Here, we show that B7-H3 is highly expressed in mouse and human adipose tissue at steady state, with the highest levels in adipocyte progenitor cells. B7-H3 is rapidly down-regulated upon the initiation of adipocyte differentiation. Combined RNA sequencing and metabolic studies reveal that B7-H3 stimulates glycolytic and mitochondrial activity of adipocyte progenitors. Loss of B7-H3 in progenitors results in impaired oxidative metabolism program and increased lipid accumulation in derived adipocytes. Consistent with these observations, mice knocked out for B7-H3 develop spontaneous obesity, metabolic dysfunction, and adipose tissue inflammation. Our results reveal an unexpected metabolic role for B7-H3 in adipose tissue and open potential new avenues for the treatment of metabolic diseases by targeting the B7-H3 pathway.