RNA was extracted and quantitative RT-PCR of discriminative cell markers (e.g. APOB, CD163, CD31, VCL) was performed. The functional activity of LSECs, KCs and HSCs was determined by uptake of acetylated low-density lipoprotein (AcLDL) and 1 latex beads or vitamin A storage, respectively. Results: Liver cell preparation resulted in following cell yields per 30-100g liver: 4.2×10^8±8.1×10^7 SEM PHHs, 4.2×10^7±6.7×10^6 SEM KCs, 7.5×10^6±1.6×10^6 SEM LSECs, 1.1×10^7±5.7×10^6 SEM HSCs. Different cell populations showed appropriate cell morphologies, indicating their identity ICG-001 concentration (bright-light microscopy). Immunofluorescence staining of albumin, CD146, CD68 and a-SMA

allowed semi-quantitative descriptions of cell purities, resulting in 90-97%. These findings were confirmed by gene expression profile of discriminative markers. Functional activity of PHHs could be documented by high abundance of albumin. Cultured KCs retained their physiological function; they efficiently phagocytized 1 latex beads in a time dependent manner. In comparison, LSECs rapidly took up AcLDL within 1h, demonstrating their functional activity in vitro. Dependent on their activation status, cultured HSCs stored different amounts of vitamin A, shown by autoflu-orescence of retinyl ester. Conclusions: Primary human hepato-cytes and non-parenchymal liver cells were isolated in high cell yield and purity. Cells showed defined cell morphologies and expression of discriminative cell markers on

RNA and protein level. Furthermore, cells were physiologically check details active in vitro. The presented method is a valuable tool with

high potential to investigate the contribution of liver cells to various liver diseases. Disclosures: The following people have nothing to disclose: Melanie Lutterbeck, Catherine I. Real, Kathrin Skibbe, Joerg Timm, Andreas Paul, Guido Gerken, Joerg F. Schlaak, Ruth Broering [Purpose] Betaine-homocysteine S-methyltransferase (BHMT) and cystathionine γ-lyase (CTH) are enzymes responsible for homocysteine Chlormezanone metabolism in the liver. Homocysteine is remeth-ylated to methionine by BHMT with the aid of betaine, or is converted to cystathionine by cystathionine β-synthase. Cysta-thionine is transsulfurated to cysteine by CTH. Nuclear receptor small heterodimer partner (SHP, NR0B2) is a pleiotropic transcriptional repressor involved in regulating various metabolic pathways in the liver. This study identified SHP as a novel modulator of homocysteine metabolism via crosstalk with FOXA1. [Methods] Gene expression levels were determined by Western blot and qPCR, as well as by next-generation RNA sequencing. Luciferase assays were performed with reporter plasmids driven by mouse Bhmt or Cth promoters. Metabolites in the liver and serum were analyzed by gas chromatogra-phymass spectrometer (GC-MS). [Results] The expression of Bhmt and Cth exhibited circadian oscillation, which was significantly increased in the liver of Shp−/− mice as compared to the wild-type (WT) mice.