Project description:The aim of the study was to characterize the transcriptional profile of cholangiocarcinoma cell line HuCCT1 after transfection with a plasmid encodind the long isoform of CASC15 (Gene ID: 401237 ; RNA sequence: NR_015410.1).
Project description:We studied the effect of Ser30 with or without O-GlcNAc modification on K18 protein and its co-immunoprecipitated proteins in cholangiocarcinoma cells.The lysates from HuCCT1 shK18 stable cell line transfected with FLAG-K18-WT or FLAG-K18-S30A were captured with anti-FLAG beads, and then subjected to in-gel trypsin digestion and LC-MS/MS analysis.
Project description:MiR-376c down-regulation accelerates EGF-dependent migration by targeting GRB2 in the HuCCT1 human intrahepatic cholangiocarcinoma cell line
Project description:The aim of the study was to characterize the transcriptional profiles of two cholangiocarcinoma cell lines (HuCCT1 and Huh28) after a treatment with Transforming Growth Factor beta (TGF-beta).
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.
Project description:Cholangiocarcinoma (CHOL) is a malignancy arising from either the intrahepatic or the extrahepatic bile ducts which carries a severe prognosis. HMGA1 is a transcription factor which has a high expression level in many types of cancer. In this study, we find HMGA1 overexpression in CHOL. In order to investigate the regulatory mechanism of HMGA1 in CHOL, we performed RNA-seq in HUCCT1 cells with HMGA1 knock down compared with control in three repeat.