Project description:Analysis of MDA-MB-231 cells 48 hours after transfection with non-targeting control, micro-RNA mimics or corresponding micro-RNA inhibitor. The hypothesis tested was that micro-RNAs previously identified as expressed in oligometastatic patients' metastases at a higher level than polymetastatic patients' metastases suppress genes regulating adhesion, motility, invasion and growth. Results showed that multiple micro-RNAs can suppress multiple genes involved in these pathways.
Project description:Analysis of MDA-MB-231 cells 48 hours after transfection with non-targeting control, micro-RNA mimics or corresponding micro-RNA inhibitor. The hypothesis tested was that micro-RNAs previously identified as expressed in oligometastatic patients' metastases at a higher level than polymetastatic patients' metastases suppress genes regulating adhesion, motility, invasion and growth. Results showed that multiple micro-RNAs can suppress multiple genes involved in these pathways. Total RNA was obtained from MDA-MB-231 cells after transfection with micro-RNA mimic, micro-RNA inhibitor, or non-targeting control MB231, performed in duplicate
Project description:Sporozoites secrete proteins which can help them adhere to/invade host cells during gliding motility on the surface of host cells. Currently, the composition of secreted proteins of C. parvum during adhesion/invasion of host cells is not fully understood. In this study, TMT labeled quantitative proteomics was used for the first time to compare and analyze the secreted proteins of C. parvum in the gliding motility state (3 hpi) and adhesion/invasion state (6 hpi). Bioinformatics analysis of the quantified differentially secreted proteins from C. parvum and HCT-8 cells showed that a total of 626 and 2339 C. parvum and HCT-8 cells secreted proteins were quantified. Differentially secreted proteins of C. parvum are mainly modified after translation, which are related to protein degradation and kinase activity, and cap-domain proteins are highly expressed during sporozoite gliding motility. However, differentially secreted proteins of HCT-8 cells are mainly concentrated in the pathways related to extracellular matrix and cell adhesion molecules. This study identified some important molecules that may be involved in the interaction between C. parvum and HCT-8 cells, providing basic data for the screening of key functional genes and the study of invasion mechanism of C. parvum.
Project description:The protein tyrosine phosphatase PRL-1 (Gene Symbol: PTP4A1) has been identified as an important oncogene with roles in promoting cell proliferation, survival, migration, invasion, and metastasis. However, little is currently known about the signaling pathways through which it mediates its effects. Studies have shown a relationship between PRL-1 and the expression or activity levels of various molecules involved in integrin-mediated cell signaling. These integrin-responsive players can promote re-arrangements in the actin cytoskeleton that are central to cell motility, invasion, and metastasis. Therefore, to investigate the effects of PRL-1 overexpression in human embryonic kidney 293 (HEK293) cells, we used qRT-PCR to examine the expression levels of 184 genes which either were identified by microarray and proteomic analysis to be differentially expressed in response to PRL-1 or have known associations to integrin-mediated signaling, cytoskeletal remodeling, and/or cell motility. Total RNA was extracted from duplicate cultures of HEK293 cells stably overexpressing PRL-1 (HEK293-PRL-1) and HEK293 cells stably transfected with empty pcDNA4 vector (HEK293-Vector). Samples were analyzed using custom TaqMan Array 96-well Plates to examine the expression of 184 genes with known involvement in or association with signaling pathways related to integrin-mediated cell adhesion, cytoskeletal remodeling, and/or cell motility.
Project description:The goal of this study is to compare miRNAs expressed by HGF treated SWAN-71 cells to miRNAs expressed in untreated control SWAN-71 cells to identify micro RNAs which play a role during HGF-mediated SWAN-71 cell invasion
Project description:The goal of this study is to compare miRNAs expressed by EGF treated SWAN-71 cells to miRNAs expressed in untreated control SWAN-71 cells to identify micro RNAs which play a role during EGF-mediated SWAN-71 cell invasion
Project description:This model builds upon two published models focused on the early steps of metastasis by Cohen et al. and on EMT process by Selvaggio et. al. The initial model of Cohen and colleagues was built with two inputs: the ECMenv, which monitored the status of the extracellular matrix, and DNA_damage, which considered DNA alterations that trigger death signals. Four additional inputs were added to account for the presence of Oxygen, growth factors (as GF), TGFbeta and the contact with other neighboring cells (as Neigh). The phenotypes, or outputs of the model include CellCycleArrest, Apoptosis, EMT, ECM_adh (for cell adhesion), ECM_degrad (for cell degradation), Cell_growth (for the dynamics of the tumor growth) and Cell_freeze (for cell motility ability). New genes and pathways include mechanisms around p63 and SRC. Genes from the Hippo pathway and RhoGTPases, such as YAP1, FAK and RAC1 were also inserted to link external signals (i.e., cell–cell contact, stiffness of the extracellular matrix, and stress signals) and intracellular regulation. The resulting network encompasses 45 nodes, with 6 input nodes, representing the possible interactions of an individual cell with external elements, and 8 output nodes or read-outs describing the possible observed phenotypes.
This model was initially developed as a MaBoSS model for a multi-scale model of tumor invasion, developed with PhysiBoSS. As SBML-qual cannot describe fully a MaBoSS model yet, we also include the MaBoSS BND and CFG files.
Project description:The goal of this study is to compare miRNAs expressed by HGF treated HTR-8/SVneo cells to miRNAs expressed in untreated control HTR-8/SVneo cells to identify micro RNAs which play a role during HGF-mediated HTR-8/SVneo cells invasion
Project description:The goal of this study is to compare miRNAs expressed by IFN-gamma treated SWAN-71 cells to miRNAs expressed in untreated control SWAN-71 cells to identify micro RNAs which play a role during IFN-gamma-mediated SWAN-71 cells invasion
