ABSTRACT: Difference of gene expression among DLD1, oxaliplatin resistant clones derived from DLD1, HCT116, and oxaliplatin resistant clones derived from HCT116
Project description:Gene expression between DLD1 and DLD1 derived oxaliplatin resistant clones (DLD/OHP1, DLD/OHP4, and DLD/OHP5) was assessed Gene expression between HCT116 and HCT116 derived oxaliplatin resistant clones (HCT/OHP1, HCT/OHP3, and HCT/OHP5) was assessed
Project description:To explore the mechanisms associated with oxaliplatin resistance, we compared gene expression in xenograft tumors derived from human colorectal cancer tumor cells HCT116 and its oxaliplatin resistant clones (HCT/OHP1 and HCT/OHP5).
Project description:HCT116 parental, HCT116 5-FU resistant and HCT116 oxaliplatin resistant cells have been transiently treated with with their respective drug (5-FU or oxaliplatin) for 0, 6 12 or 24h in 3 independent experiments.
Project description:Oxaliplatin resistance frequently leads to therapeutic failure in colorectal cancer (CRC). Increasing evidence has shown that noncoding RNAs (ncRNAs) play pivotal roles in chemoresistance of CRC. However, the roles and mechanisms of ncRNAs in oxaliplatin resistance are not well understood. In this study, to identify the ncRNAs induced by oxaliplatin, we profile the expression of ncRNAs in oxaliplatin-resistant HCT116 CRC cells (HCT116oxR) and parental HCT116 cells using next-generation sequencing technology.
Project description:Human cancer cell lines (DLD1 wt or ZNF692 KO, and for IP-proteomics HCT116 transfected with GFP, GFP-ZNF692 and deltaNolsZNF692). 788570, HCT116 transfected with GFP;
788571, HCT116 transfected with GFP-ZNF692;
788572, HCT116 transfected with deltaNolsZNF692;
937612, control 40S subunit from DLD1 cells;
937613, control 60S subunit from DLD1 cells;
937614, control 80S monosome fraction from DLD1 cells;
937615, KO ZNF692 40S subunit from DLD1 cells;
937616, KO ZNF692 60S subunit from DLD1 cells;
937617, KO ZNF692 80S monosome fraction from DLD1 cells;
943031, control 40S subunit from DLD1 cells;
943032, control 60S subunit from DLD1 cells;
943033, control 80S monosome fraction from DLD1 cells;
943034, KO ZNF692 40S subunit from DLD1 cells;
943035, KO ZNF692 60S subunit from DLD1 cells;
943036, KO ZNF692 80S monosome fraction from DLD1 cells
Project description:Gene expression profiling of immortalized human mesenchymal stem cells with hTERT/E6/E7 transfected MSCs. hTERT may change gene expression in MSCs. Goal was to determine the gene expressions of immortalized MSCs.
Project description:Kynureninase is a member of a large family of catalytically diverse but structurally homologous pyridoxal 5'-phosphate (PLP) dependent enzymes known as the aspartate aminotransferase superfamily or alpha-family. The Homo sapiens and other eukaryotic constitutive kynureninases preferentially catalyze the hydrolytic cleavage of 3-hydroxy-l-kynurenine to produce 3-hydroxyanthranilate and l-alanine, while l-kynurenine is the substrate of many prokaryotic inducible kynureninases. The human enzyme was cloned with an N-terminal hexahistidine tag, expressed, and purified from a bacterial expression system using Ni metal ion affinity chromatography. Kinetic characterization of the recombinant enzyme reveals classic Michaelis-Menten behavior, with a Km of 28.3 +/- 1.9 microM and a specific activity of 1.75 micromol min-1 mg-1 for 3-hydroxy-dl-kynurenine. Crystals of recombinant kynureninase that diffracted to 2.0 A were obtained, and the atomic structure of the PLP-bound holoenzyme was determined by molecular replacement using the Pseudomonas fluorescens kynureninase structure (PDB entry 1qz9) as the phasing model. A structural superposition with the P. fluorescens kynureninase revealed that these two structures resemble the "open" and "closed" conformations of aspartate aminotransferase. The comparison illustrates the dynamic nature of these proteins' small domains and reveals a role for Arg-434 similar to its role in other AAT alpha-family members. Docking of 3-hydroxy-l-kynurenine into the human kynureninase active site suggests that Asn-333 and His-102 are involved in substrate binding and molecular discrimination between inducible and constitutive kynureninase substrates.
