Establishing 3D Organoid Models from Patient-Derived Conditionally Reprogrammed Cells to Bridge Preclinical and Clinical Insights in Pancreatic Cancer
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ABSTRACT: Establishing 3D Organoid Models from Patient-Derived Conditionally Reprogrammed Cells to Bridge Preclinical and Clinical Insights in Pancreatic Cancer
Project description:Pancreatic cancer is a highly aggressive malignancy with limited therapeutic options. To address the limitations of traditional 2D cell culture models, we developed 3D organoid cultures from patient-derived conditionally reprogrammed cell (CRC) lines. These organoids retain the molecular and mutational profiles of the original tumor cells, providing a more accurate model for drug response prediction. Drug sensitivity assays using gemcitabine plus nab-paclitaxel (Abraxane) and FOLFIRINOX revealed that 3D organoids more closely reflect clinical outcomes than 2D cultures, with higher IC50 values consistent with in vivo drug resistance. This platform offers a promising approach for precision medicine in pancreatic cancer.
Project description:Discovery of therapies that are able to correct defective CFTR requires patient derived in vitro pre-clinical cell models to be developed. Two main approaches exist to expand bronchial and nasal cultures, such as conditionally reprogrammed cells (CRC) and feeder free dual SMAD inhibition (SMADi) to overcome senescence, low cell count, and increase passages. To mimic airway epithelium the expanded cells are differentiated at air liquid Interface (ALI). This project focused to compare the global proteome of ALI differentiated CRC and SMADi expanded HNECs both treated and untreated with CFTR corrector VX-809.
Project description:Here we characterize and optimize both systems to increase their utility for preclinical studies. We show that TH-MYCN mice develop tumors in the paraspinal ganglia, but not in the adrenal, with cellular and gene expression patterns similar to human NB. In addition, we present a new ultrasound guided, non-invasive orthotopic xenograft method. This injection technique is rapid, provides accurate targeting of the injected cells and leads to efficient engraftment. We also demonstrate that tumors can be detected, monitored and quantified prior to visualization using ultrasound, MRI and bioluminescence. Finally we develop and test a “standard of care” chemotherapy regimen. This protocol, which is based on current treatments for neuroblastoma, provides a baseline for comparison of new therapeutic agents. A total of 17 samples are provided reprsenting TH-MYCN tumors derived from mice
Project description:Strigolactones are a novel class of plant hormones produced in roots and regulate shoot and root development. We have previously shown that synthetic strigolactone analogues potently inhibit growth of breast cancer cells and breast cancer stem cells. Here we show that strigolactone analogues inhibit the growth and survival of an array of cancer-derived cell lines representing solid and non-solid cancer cells including: prostate, colon, lung, melanoma, osteosarcoma and leukemic cell lines, while normal cells were minimally affected. Furthermore, we tested the response of patient-matched conditionally reprogrammed normal and prostate cancer cells. The tumor cells exhibited significantly higher sensitivity to the two most potent SL analogues with increased apoptosis compared to their normal counterpart cells. Treatment of cancer cells with strigolactone analogues was hallmarked by increased expression and activity of genes involved in stress signaling, cell cycle arrest and apoptosis. All five strigolactone analogues induced G2/M cell cycle arrest, accompanied with a decrease in the expression level of cyclin B1. Apoptosis was marked by increased percentages of cells in the sub-G1 fraction and was confirmed by Annexin V staining. In conditionally reprogramed matched tumor and normal prostate cells, the cleavage of PARP1 confirmed the specific increase in apoptosis of tumor cells. In summary, Strigolactone analogues are promising candidates for anticancer therapy by their ability to specifically induce cell cycle arrest, cellular stress and apoptosis in tumor cells with minimal effects on growth and survival of normal cells.
Project description:Strigolactones are a novel class of plant hormones produced in roots and regulate shoot and root development. We have previously shown that synthetic strigolactone analogues potently inhibit growth of breast cancer cells and breast cancer stem cells. Here we show that strigolactone analogues inhibit the growth and survival of an array of cancer-derived cell lines representing solid and non-solid cancer cells including: prostate, colon, lung, melanoma, osteosarcoma and leukemic cell lines, while normal cells were minimally affected. Furthermore, we tested the response of patient-matched conditionally reprogrammed normal and prostate cancer cells. The tumor cells exhibited significantly higher sensitivity to the two most potent SL analogues with increased apoptosis compared to their normal counterpart cells. Treatment of cancer cells with strigolactone analogues was hallmarked by increased expression and activity of genes involved in stress signaling, cell cycle arrest and apoptosis. All five strigolactone analogues induced G2/M cell cycle arrest, accompanied with a decrease in the expression level of cyclin B1. Apoptosis was marked by increased percentages of cells in the sub-G1 fraction and was confirmed by Annexin V staining. In conditionally reprogramed matched tumor and normal prostate cells, the cleavage of PARP1 confirmed the specific increase in apoptosis of tumor cells. In summary, Strigolactone analogues are promising candidates for anticancer therapy by their ability to specifically induce cell cycle arrest, cellular stress and apoptosis in tumor cells with minimal effects on growth and survival of normal cells. There are duplicate samples for each condition. U2OS cells were treated with 2 different strigolactone analogues: ST362 or MEB55 at the concentration of 5 ppm for either 6 hr or 24 hr.Control samples were those treated with vehicle only .