ABSTRACT: Gene expression profile of two colorectal cancer HT29 and DLD-1 cell lines treated with single or fractionated ionizing radiation doses under 3D cell culture conditions.
Project description:Gene expression profile of two reporgrammed cell lines iPSC CRL1831 (induced pluripotent stem cells) and CSC DLD1 (cancer stem-like cells) derived from normal colon CRL1831 and colorectal cancer DLD-1 cells, after transfer to 3D cell culture conditions and cell lines treated with single or fractionated ionizing radiation doses under 3D cell culture conditions. There are no data that cancer metastases arise due to specific mutations of cancer cells. Therefore ongoing investigation of reprogrammed cancer cells grown in three-dimensional (3D) cell culture models might provide researchers with essential data studying tumor oncogenesis and metastases formation. 3D culture models were shown to mimic in vivo cell microenvironment more accurately than the standard two-dimensional cell monolayer (2D) cultures. Also, growing evidence suggests that 2D and 3D cultured cells gene expression pattern variance following irradiation is highly dependent on cancer cell state and their interaction with microenvironment.
Project description:Tumor cell response to irradiation also depends on their microenvironment. Therefore ongoing investigation of three-dimensional (3D) cell culture models provide researchers with essential data studying and remodeling radiotherapeutic implications in cancer treatment. 3D culture models were shown to mimic in vivo cell microenvironment more accurately than the standard two-dimensional cell monolayer (2D) cultures. Growing evidence suggests that 2D and 3D cultured cell gene expression pattern discrepancies following irradiation is highly dependent on cell-ECM interactions. It has been shown that laminin-rich-extracellular matrix (lr-ECM) used in 3D cultures not only alters cancer cell phenotype and response to external stimuli but also affects their differentiation, migration and survivability. Thus, a change in these fundamental cell properties demands us to reconsider data previously collected using 2D in vitro models. RNA was harvested from two colorectal cancer cell lines cultivated under 3D cell culture conditions, 4h after treatment of single (2 Gy or 10 Gy) or fractionated (5x2 Gy) ionizing radiation dose.
Project description:Radiotherapy is one of the most common therapies for cancer. Approximately half of all cancer patients will receive radiotherapy at some point during treatment. Consequences of IR treatment are dose dependent and different sensitivity to IR of various types of cells is well established. To reduce the damage of IR to most sensitive cells of normal (noncancerous) tissue radiotherapy is administered as fractionated dose treatment applying radiation in ~2 Gy fractions every 24 hours, 5 times per week. However, during the therapy intrinsic and acquired tumor radioresistance may result in treatment failures. Comprehensive mechanisms of the resistance to irradiation as well as mechanisms of cellular response to fractionated dose IR remain unclear. Therefore, in the present study we evaluated global gene expression changes in murine Lewis lung carcinoma LLC1 cells following X-ray irradiation of single 2 Gy or 10 Gy and 2 Gy x 5 fractionated doses. Total RNA was harvested from mouse Lewis lung carcinoma cells 4h after treatment of single (2 Gy or 10 Gy) or fractionated (5x2 Gy) ionizing radiation dose.
Project description:Gene expression profile of colorectal cancer HCT116 cells treated with single (2Gy) or fractionated (5 x 2Gy) doses of ionizing radiation.
Project description:Gene expression profile of colorectal cancer HCT116_p53minus cells treated with single (2Gy) or fractionated (5 x 2Gy) doses of ionizing radiation.
Project description:New developments show that patients with prostate cancer can benefit from radiotherapy deliv-ered with a hypo-fractionated regimen. The aim of our study was to investigate the effect of hy-po-fractionated stereotactic body radiation therapy (SBRT) of prostate cancer on out-of-field organs. We used a humanoid phantom to irradiate prostate cells in conditions similar to patient therapy, using SBRT planning. Our results show that radiation doses in the location of the intes-tine and lung resulted in significantly higher radiation doses than the further locations. We observed a high radiotoxic effect in the cells irradiated in the prostate, and a small increase in DNA damage and cell killing in the intestine location. Gene expression analysis revealed significant enrichment of the biological processes related to the radiation response in the prostate. In the lung and thyroid, the enrichment of several gene groups was revealed, however the processes were not clearly related to the response to radiation. Our study provides extensive data on out-of-field safety of prostate SBRT.
Project description:Cell lines iPSC CRL1831 (induced pluripotent stem cells) and CSC DLD1 (cancer stem-like cells) derived from normal colon CRL1831 and colorectal cancer DLD-1 cells in 3D cell culture conditions and subjected to ionizing radiation doses
