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First-in-class humanized antibody against alternatively spliced tissue factor augments anti-metastatic efficacy of chemotherapy in a preclinical model of pancreatic ductal adenocarcinoma

ABSTRACT: First-in-class humanized antibody against alternatively spliced tissue factor augments anti-metastatic efficacy of chemotherapy in a preclinical model of pancreatic ductal adenocarcinoma

PROVIDER: PRJNA1059259 | ENA |

REPOSITORIES: ENA

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First-in-class humanized antibody against alternatively spliced tissue factor augments anti-metastatic efficacy of chemotherapy in a preclinical model of pancreatic ductal adenocarcinoma

Project description:Alternatively spliced tissue factor (asTF) promotes progression of pancreatic ductal adenocarcinoma (PDAC) by activating beta1-integrins on PDAC cell surfaces. hRabMab1, a first-in-class, humanized, inhibitory, anti-asTF antibody we recently developed, can suppress PDAC primary tumor growth as a single agent. Whether hRabMab1 has the potential to suppress metastases in PDAC is unknown. Study results. When administered alone, hRabMab1 achieved only marginal penetration of experimental tumor tissue; however, hRabMab1 was abundant in tumor tissue when co-administered with gem/PTX which resulted in a significant decrease in tumor cell proliferation; leukocyte infiltration; and neovascularization. Gem/PTX alone reduced primary tumor volume, but not metastatic spread; only the combination of hRabMab1 and gem/PTX significantly reduced metastatic spread. RNAseq analysis of primary tumors showed that the addition of hRabMab1 to gem/paclitaxel enhanced the downregulation of tubulin binding and microtubule motor activity. In the liver, hRabMab1 reduced liver metastasis as a single agent. Only the combination of hRabMab1 and gem/PTX eliminated tumor cell-induced leukocytosis. Conclusions. This study demonstrates that hRabMab1 may help suppress metastasis in PDAC.

2024-12-31 | GSE252286 | GEO

A first-in-class, humanized antibody targeting alternatively spliced tissue factor: preclinical evaluation in an orthotopic model of pancreatic ductal adenocarcinoma

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Mutations primarily alter the inclusion of alternatively spliced exons

Project description:Systematic mutagenesis has revealed that synonymous, non-synonymous and intronic mutations frequently alter the inclusion levels of alternatively spliced exons, suggesting that altered splicing might be a common mechanism by which mutations cause disease. However, most exons expressed in any cell are highly-included in mature mRNAs. Here, by performing deep mutagenesis of highly-included exons and by analysing the association between sequence variation and exon inclusion across the genome, we report that mutations only very rarely alter the inclusion of highly-included exons. This is true for both exonic and intronic mutations as well as for perturbations in trans. Therefore, mutations that affect splicing are not evenly distributed across the genome but are focussed in and around alternatively spliced exons with intermediate inclusion levels. These results provide a resource for prioritising synonymous and other variants as disease-causing mutations.

2020-06-29 | GSE151942 | GEO

Gene expression profiling of Capan-1 and Pt45P1 cells treated or not with alternatively spliced tissue factor (asTF)

Project description:The effects of alternatively spliced tissue factor (asTF) were measured by gene expression profiling of Capan-1 and Pt45P1 cells.

2013-04-10 | GSE45928 | GEO

Heterogeneous Expression of Alternatively Spliced lncRNA mediates Vascular Smooth Cell Plasticity

Project description:Heterogeneous Expression of Alternatively Spliced lncRNA mediates Vascular Smooth Cell Plasticity

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First-in-Class Humanized Antibody against Alternatively Spliced Tissue Factor Augments Anti-Metastatic Efficacy of Chemotherapy in a Preclinical Model of Pancreatic Ductal Adenocarcinoma.

Project description:Alternatively spliced tissue factor (asTF) promotes the progression of pancreatic ductal adenocarcinoma (PDAC) by activating β1-integrins on PDAC cell surfaces. hRabMab1, a first-in-class humanized inhibitory anti-asTF antibody we recently developed, can suppress PDAC primary tumor growth as a single agent. Whether hRabMab1 has the potential to suppress metastases in PDAC is unknown. Following in vivo screening of three asTF-proficient human PDAC cell lines, we chose to make use of KRAS G12V-mutant human PDAC cell line PaCa-44, which yields aggressive primary orthotopic tumors with spontaneous spread to PDAC-relevant anatomical sites, along with concomitant severe leukocytosis. The experimental design featured orthotopic tumors formed by luciferase labeled PaCa-44 cells; administration of hRabMab1 alone or in combination with gemcitabine/paclitaxel (gem/PTX); and the assessment of the treatment outcomes on the primary tumor tissue as well as systemic spread. When administered alone, hRabMab1 exhibited poor penetration of tumor tissue; however, hRabMab1 was abundant in tumor tissue when co-administered with gem/PTX, which resulted in a significant decrease in tumor cell proliferation; leukocyte infiltration; and neovascularization. Gem/PTX alone reduced primary tumor volume, but not metastatic spread; only the combination of hRabMab1 and gem/PTX significantly reduced metastatic spread. RNA-seq analysis of primary tumors showed that the addition of hRabMab1 to gem/PTX enhanced the downregulation of tubulin binding and microtubule motor activity. In the liver, hRabMab1 reduced liver metastasis as a single agent. Only the combination of hRabMab1 and gem/PTX eliminated tumor cell-induced leukocytosis. We here demonstrate for the first time that hRabMab1 may help suppress metastasis in PDAC. hRabMab1's ability to improve the efficacy of chemotherapy is significant and warrants further investigation.

| S-EPMC10932375 | biostudies-literature

Gene expression profiling of Capan-1 and Pt45P1 cells treated or not with alternatively spliced tissue factor (asTF)

Project description:The effects of alternatively spliced tissue factor (asTF) were measured by gene expression profiling of Capan-1 and Pt45P1 cells. 4 samples: Capan-1 cells +/- asTF, Pt45P1 cells +/- asTF.

2013-04-10 | E-GEOD-45928 | biostudies-arrayexpress

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