Project description:Investigation of whole genome gene expression level changes in a colorectal cancer cell line SW480 expressing FOXC2, compared to the pBabe control cells. Genes associated with metastasis regulated by FOXC2 in colorectal cancer were analysed. The role of FOXC2 in breast cancer metastasis are further described in Mani SA, Yang J et al. Mesenchyme Forkhead 1 (FOXC2) plays a key role in metastasis and is associated with aggressive basal-like breast cancers. PNAS 2007; 104: 10069-10074 . A six chip study using total RNA recovered from three separate cultures of SW480/pBabe and three separate cultures of SW480/FOXC2. Each chip measures the expression level of 45033 genes from SW480/pBabe or SW480/FOXC2.
Project description:Human mesenchymal stem cell (MSC)-conditioned medium (CM) was previously reported to affect the biology of tumor cells; however, the precise mechanisms remain unclear. Here, we show that MSCs secreted 40- to 100-nm particles, which have the typical characteristics of exosomes, and these MSC-derived exosomes promoted migration of the breast cancer cell line MCF7. To further investigate the effect of MSC-exosomes on MCF7, we analyzed the gene expression profiles of MCF7 treated with or without MSC-exosomes for 24 h. Investigation of whole genome gene expression level changes in breast cancer cell line MCF7 which were treated with or without mesenchymal stem cell-derived exosomes. This study uses total RNA recovered from two samples. One sample is MCF7 treated with PBS for 24 hours and another one is MCF7 treated with mesenchymal stem cell-derived exosomes for 24hours. The ultimate concentration of mesenchymal stem cell-derived exosomes used in this experiment was 400ng/ul.
Project description:Investigation of lncRNA expression profile of gastric cancer A six chip study using total RNA extracted from three gastric cancer tissues and three paracancerous tissues
Project description:Long noncoding RNAs (lncRNAs) are a class of non-coding RNAs longer than 200 nt that function in endogenous gene regulation and tumorigenesis. Hepatocellular carcinoma (HCC) is a heterogeneous disease with different treatment outcome. It is a challenge to develop a prognostic marker to identify HCC patients who are at greatest risk for recurrence or death. In this study, we try to screen lncRNAs whose expression levels are associated with recurrence or death of HCC patients through an extensive lncRNA profiling study on a cohort of 59 HCC patients. For these experiments, we used RNA extracted from 59 HCC tissues and 20 normal livers. Total RNAs from the 20 normal livers were pooled and used as a reference for all microarray experiments. For each microarray experiment, Cy5-labeled probes derived from the DNase-treated total RNA from each HCC sample was hybridized against Cy3-labeled probes derived from common reference on Arraystar Human LncRNA Microarray (Arraystar, Rockville, USA). LncRNAs whose expression was significantly associated with disease-specific survival and time to recurrence were selected based on microarray data. The univariate Cox proportional hazards model was used to assess the association of lncRNAs with survival. We computed a statistical significance level (P value) for two endpointsM-bM-^@M-^Tthe time to cancer-related death and time to recurrence, based on univariate Cox proportional hazards models in BRB-ArrayTools version 4.2.0.
Project description:Hepatoarcinogenesis is a slow and multistep process. We used Hepatitis B virus X antigen (HBx) induced Hepatocellular carcinoma (HCC) as model. We also identify the biomarkers, the pathways and networks underlying HCC formation in this animal model. We analyzed the events from the early, middle, and late stages, in order to predict and prevent the development of cancer. At each specific stage, we analyzed the expression level that differed at least two-fold between HBx transgenic and wild-type mouse liver. Statistical approaches were used to identify genes displaying an increasing or decreasing trend throughout hepatocarcinogenesis. The liver was excised from 6-week-, 8-month-, 12-month-, 14-month-, and 16-month-old HBx transgenic mice (A106 strain) and RNA samples were isolated. In both 14-month- and 16-month-old mice, samples were obtained from both the tumor tissue and the normal.
Project description:Gene expression changes in metastasis associated macrophage (MAM) with control and FLT1 inhibitory antibody (MF1) were compared using FACS sorted cells from mice bearing pulmonary metastasis of breast tumor cells treated with Ctrl and MF1 antibody A six chip study using total RNA recovered from metastasis associated macrophages from three separate mice treated with FLT1 inhibitory antibody (MF1) and three separate mice treated with control antibody. Each chip measures the expression level of 42586 genes.
Project description:Gene expression changes in metastasis associated macrophage (MAM) FACS sorted cells from mice bearing pulmonary metastasis of breast tumor cells were compared with lung and spleen resident macrophages sorted from healthy mice using same sorting protocol. A six chip study using total RNA recovered from metastasis associated macrophages from three individual mice and lungs and spleens all from three individual mice. Each chip measures the expression level of 42586 genes.
Project description:Neuronal restricted progenitors (NRPs) represent a type of transitional intermediate cells that lie between multipotent neural progenitors (NPs) and terminal differentiated neurons during neurogenesis. These NRPs have the ability to self-renew and differentiate into neurons, but not into glial cells, which is considered as an advantage for cellular therapy of human neurodegenerative diseases. However, difficulty in the extraction of highly purified NPRs from normal nervous tissue prevents further studies and applications. In this study, we reported conversion of human fetal dermal fibroblasts into human induced neuronal restricted progenitors (hiNRPs) in seven days by using just three defined factors: Sox2, c-Myc, and either Brn2 or Brn4. The hiNRPs exhibited distinct neuronal characteristics, including cell morphology, multiple neuronal markers expression, self-renewal capacity, and genome-wide transcriptional profile. Moreover, hiNRPs were able to differentiate into various terminal neurons with functional membrane properties, but not glial cells. Direct generation of hiNRPs from somatic cells will provide a new source of cells for cellular replacement therapy of human neurodegenerative diseases. This is a general expression microarray design (NimbleGen platform). It includes 5 samples.
Project description:To find the discover target genes regulated by hnRNP A1 in oral squamous cell carcinoma, NimbleGen 12x135K microarrays were used to find the gene expression changes between hnRNP A1 or non-specific (NS) siRNA treated oral cancer cells. Cal27 cells were treated with hnRNP A1 or non-specific (NS) siRNA twice in a 48-hour interval. After 96 hours, total RNAs were collected for microarray assay. Total RNAs from hnRNP A1 knockdown (3 samples) or NS siRNA treated cells (3 samples) were used for chip experiment (6 chips). Each chip measures the expression levels of human 45,033 genes. NimbleGen One-Color DNA Labeling Kit was used for sample labeling. Hybridization was performed in NimbleGen Hybridization System. After washing, slides were scanned with Axon GenePix 4000B scanner. Data was extracted and normalized using NimbleScan v2.5 Software.
Project description:Investigation of global gene expression levels between B cells, Natural killer cells and Natural killer B cells Gene expression profiling using sorted B cells, Natural killer cells and Natural killer B cells from WT mouse spleen. Total RNA extracted from WT cells were quantified by the NanoDrop ND-1000 and RNA integrity was assessed by standard denaturing agarose gel electrophoresis. The sample preparation and microarray hybridization were performed based on the NimbleGenâs standard protocols.