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Project description:The microtubule-stabilising drug paclitaxel has activity in relapsed ovarian cancer. However, resistance frequently develops. Oncolytic adenoviruses are a novel cancer therapy, and replicate selectively within and lyse malignant cells, leading to productive infection of neighbouring cells. We found increased efficacy of adenoviruses of multiple subtypes in paclitaxel-resistant ovarian cancer cells. There was increased expression of a key adenovirus receptor, CAR (coxsackie adenovirus receptor), due to increased transcription that resulted from histone modification. Moreover, CAR transcription increased in intraperitoneal xenografts with acquired paclitaxel resistance and in tumours from patients with paclitaxel-resistant ovarian cancer. Finally, we identified dysregulated cell cycle control as a second mechanism of increased adenovirus efficacy in paclitaxel-resistant ovarian cancer and that inhibition of CDK4/6 using PD-0332991 was able both to reverse paclitaxel resistance and reduce adenovirus efficacy. Thus, paclitaxel resistance increases oncolytic adenovirus efficacy via at least two separate mechanisms. Parental SKOV3 and paclitaxel-resistant SKOV3-TR cells were analysed in duplicate
2015-12-10 | E-GEOD-54772 | biostudies-arrayexpress
Project description:The goals of this study are to compare the transcriptome differences between SKOV3 and rhCCL20-treated SKOV3 cells and identify the defferential expressed genes regulated by rhCCL20 in SKOV3 cells. We treated SKOV3 cells with 5% trehalose (control group) and rhCCL20 protein dissolved in 5% trehalose (experimental group) in vitro. The cells were collected 24 hours after treatment and used for RNA-sequencing.
2020-11-20 | GSE161799 | GEO
Project description:Transcriptomic analysis of tumor tissues isolated from animals bearing F9 teratocarcinoma. 129Sv mice were challenged with F9 tumor cells and, when tumors were palpable, mice were treated with EDA CAR-T s (a mixture of 1×107 CD4+ and 2×106 CD8+ CAR-T cells)or left untreated. 14 days after adoptive transfer, RNA was isolated from tumors for their transcriptomic analysis.
2022-08-10 | GSE204887 | GEO
Project description:To investigate the activation of CAR-macrophages by the antigen CEA, we treated CAR-macrophages with CEA and detected them by RNA-Seq.
2024-10-17 | GSE279348 | GEO
Project description:Molecular mechanisms of anti-cancer activities of BG-P1600-TAT were explored employing genome-wide expression profiling experiments. Human neuroblastoma cell line SK-N-FI and primary cells SKNAS were treated with 30µM of the BG-P1600-TAT for 48 hours, harvested, and total RNA was immediately isolated from three biological replicates of control (vehicle-treated) and BG-P1600-TAT-treated cells. Gene expression profiling experiments identified 14-gene BG-P1600-TAT molecular interference signature captured most biologically important significantly enriched records reflecting the putative molecular mechanisms of anti-cancer activities of the BG-P1600-TAT. In BG-P1600-TAT treated SK-N-FI cells, 753 differentially expressed genes (DEGs) were identified compared to control vehicle-treated cells. Among 753 DEGs, 427 genes were down-regulated and 326 genes were up-regulated. In SKNAS cells, BG-P1600-TAT showed a significant effects on signal transduction pathways activated during cellular responses to IL-1alpha, TNF-alpha, EGF, TGF, PDGF, and AR. Further BG-P1600-TAT also showed a significant effect on multiprotein complexes of potential biological and therapeutic significance, including several complexes engaged during apoptosis (BCL-2 family protein complex; Survivin complex; BAX complex; Caspase complex), angiogenesis (VEGF-A complex; Thrombospondin complex), and cell adhesion (Galectin complex; Integrin alpha/beta complexes).
2021-09-06 | GSE183482 | GEO
Project description:The majority of patients treated with currently approved adoptive T-cell therapies (ACT) and, specifically, chimeric antigen receptor (CAR) T cells will eventually fail treatment. Furthermore, ACT has not been successful against solid cancers and several hematological malignancies, including T-cell lymphomas which have extremely poor prognosis. One of the main barriers to the effective activity of adoptively transferred T cells is their inhibition when they reach the tumor bed. In this study, we discover that CD5 inhibits CAR T activation and that the knockout (KO) of CD5 using CRISPR-Cas9 enhances the anti-tumor effect of CAR and TCR T cells in multiple hematological and solid cancer models. As a consequence, CD5 KO T cells display increased in vivo expansion and persistence. Despite this increased activity, no clear increased toxicity was observed in preclinical models. These findings support the development of CD5 KO adoptive T-cell therapies in early-phase clinical trials for relapsed and refractory cancer.
2024-07-18 | GSE248590 | GEO
Project description:Next Generation Sequencing of Transcriptomes in SKOV3 and rhCCL20-treated SKOV3 cells
| PRJNA679482 | ENA
Project description:A significant challenge for chimeric antigen receptor (CAR) T cell therapy against glioblastoma (GBM) is its immunosuppressive tumor microenvironment (TME), which is densely populated and supported by protumoral glioma-associated microglia and macrophages (GAMs). Targeting CD47, a don't-eat-me signal overexpressed by tumor cells, disrupts the CD47-SIRPalpha axis and induces GAM phagocytic function. However, antibody-mediated CD47 blockade monotherapy is associated with toxicity and low bioavailability in solid tumors. To overcome these limitations, we combined local CAR T cell therapy with paracrine GAM modulation to effectively eliminate GBM. To this end, we engineered a new CAR T cell against epidermal growth factor receptor variant III (EGFRvIII) that constitutively secretes a signal regulatory protein gamma (SIRPgamma)-related protein (SGRP) with high affinity to CD47. Anti-EGFRvIII-SGRP CAR T cells eliminated EGFRvIII+ GBM in a dose-dependent manner in vitro and eradicated orthotopically xenografted EGFRvIII-mosaic GBM by locoregional application in vivo. This resulted in significant tumor-free long-term survival, followed by partial tumor control upon tumor re-challenge. Combining anti-CD47 antibodies with anti-EGFRvIII CAR T cells failed to achieve a similar therapeutic effect, underscoring the importance of sustained paracrine GAM modulation. Multidimensional brain immunofluorescence microscopy and in-depth spectral flow cytometry on GBM-xenografted brains showed that anti-EGFRvIII-SGRP CAR T cells accelerated GBM clearance, increased CD68+ cell trafficking to tumor scar sites and promoted GAM-mediated tumor cell uptake. In a peripheral lymphoma mouse xenograft model, anti-CD19-SGRP CAR T cells had superior efficacy to conventional anti-CD19 CAR T cells. Validation on human GBM explants revealed that anti-EGFRvIII-SGRP CAR T cells had a similar tumor-killing capacity to anti-EGFRvIII CAR monotherapy but showed a slight improvement in the maintenance of tumor-infiltrated CD14+ cells. Thus, local anti-EGFRvIII-SGRP CAR T cell therapy combines the potent antitumor effect of engineered T cells with the modulation of the surrounding innate immune TME. This results in the additive elimination of bystander EGFRvIII- tumor cells in a manner that overcomes the main mechanisms of CAR T cell therapy resistance, including tumor innate immune suppression and antigen escape.
2024-07-19 | MSV000095386 | MassIVE
Project description:The majority of patients treated with currently approved adoptive T-cell therapies (ACT) and, specifically, chimeric antigen receptor (CAR) T cells will eventually fail treatment. Furthermore, ACT has not been successful against solid cancers and several hematological malignancies, including T-cell lymphomas which have extremely poor prognosis. One of the main barriers to the effective activity of adoptively transferred T cells is their inhibition when they reach the tumor bed. In this study, we discover that CD5 inhibits CAR T activation and that the knockout (KO) of CD5 using CRISPR-Cas9 enhances the anti-tumor effect of CAR and TCR T cells in multiple hematological and solid cancer models. As a consequence, CD5 KO T cells display increased in vivo expansion and persistence. Despite this increased activity, no clear increased toxicity was observed in preclinical models. These findings support the development of CD5 KO adoptive T-cell therapies in early-phase clinical trials for relapsed and refractory cancer.
2024-07-18 | GSE237805 | GEO