SREBP-1 Transcription Factor Assay Kit Reference: 10010854-96 Three known isoforms of SREBP transcription factors have been characterized: SREBP-1a, SREBP-1c, and SREBP-2. SREBP-1c acts primarily to activate genes required for fatty acid synthesis, such as acetyl-CoA carboxylase, fatty acid synthase, and long chain fatty acid elongase. In addition, SREBP-1c may also contribute to the regulation of glucose uptake and synthesis through induction of glucokinase. SREBP-1c has important clinical implications in the treatment of many diseases including obesity, diabetes mellitus, insulin resistance, and non-alcoholic fatty liver disease.
Xanthine Oxidase Fluorometric Assay Kit Reference: 10010895-96 XO catalyzes the hydroxylation of hypoxanthine to xanthine and then further catalyzes the oxidation of xanthine to uric acid. When oxidizing NADH, XO generates superoxide, a powerful ROS. XO is found predominantly in the liver and intestine. However, levels of circulating XO can increase dramatically with disease. Cayman’s XO Assay provides a simple and accurate method for quantifying xanthine oxidase activity. The assay is based on a multistep enzymatic reaction whose end product resorufin, a highly fluorescent compound, can be easily analyzed using an excitation wavelength between 520-550 nm and an emission wavelength between 585-595 nm.
SIRT1 FRET-Based Screening Assay Kit Reference: 10010991-96 Human SIRT1 is the homolog of yeast Sir2 and has been shown to regulate the activity of the p53 tumor suppressor and inhibit apoptosis. Cayman’s SIRT1 FRET-based Screening Assay provides a convenient fluorescence-based method for screening SIRT1 inhibitors or activators. The procedure requires only two easy steps, both performed in the same microplate. In the first step, the substrate, which is coupled to the fluorophore and quencher, is incubated with human recombinant SIRT1 along with its cosubstrate NAD+. Deacetylation sensitizes the substrate such that treatment with the developer in the second step results in the separation of the quencher and fluorophore. The resulting fluorescence is analyzed using an excitation wavelength between 335-345 nm and emission wavelength between 440-465 nm.
Cell-Based Assay Epigallocatechin Gallate (EGCG) Reference: 10011096-1 Cell-Based Assay EGCG has been formulated and tested to work with Cayman’s Assay Kits. Detailed instructions for its use are contained in the respective Cayman Assay Kit booklet.
LDL Uptake Cell-Based Assay Kit Reference: 10011125-1 LDL uptake and its regulation are important therapeutic targets for atherosclerosis and related diseases. Cayman Chemical’s LDL Uptake Cell-Based Assay employs a preparation of human LDL conjugated to Dylight™ 550 as a fluorescent probe for detection of LDL uptake into cultured cells. A LDL receptor-specific antibody and a Dylight™ 488-conjugated secondary antibody are included in the kit for identifying the distribution of LDL receptors. The kit provides a convenient tool for studying LDL uptake and its regulation at the cellular level.
HDAC Fluorometric Activity Assay Kit Reference: 10011563-96 HDACs catalyze the hydrolytic removal of acetyl groups from histone lysine residues resulting in chromatin condensation and transcriptional repression of chromosomal DNA. Thus, HDAC inhibition allows the conformation of DNA to be relaxed and transcriptional activation to ensue. Transcriptional repression of key genes has linked HDAC activity to cell growth and tumor development. Cayman’s HDAC Activity Assay provides a fast, fluorescence-based method for measuring Class I and II HDAC activity that eliminates radioactivity, extraction, or chromatography. The procedure requires only two easy steps, both performed in the same microplate. The fluorescent reaction product is analyzed using a plate reader with excitation wavelengths between 340-360 nm and emission wavelengths between 440-465 nm.
HDAC1 Inhibitor Screening Assay Kit Reference: 10011564-96 Cayman’s HDAC1 Inhibitor Screening Assay provides a fast, fluorescence based method for screening HDAC1 inhibitors. The procedure requires only two easy steps, both performed in the same microplate. The fluorescent reaction product is analyzed using excitation wavelengths between 340-360 nm and emission wavelengths between 440-465 nm. Sufficient purified HDAC1 is provided for 100 tests.
SIRT3 Direct Fluorescent Screening Assay Kit Reference: 10011566-96 The sirtuins represent a distinct class of trichostatin A-insensitive lysyl-deacetylases (class III HDACs) that catalyze a reaction coupling lysine deacetylation to the formation of nicotinamide and O-acetyl-ADP-ribose. Cayman’s Direct Fluorescent Screening Assay Kits provide a convenient fluorescence-based method for screening SIRT inhibitors or activators. The procedure requires only two easy steps, both performed in the same microplate. In the first step, the substrate is incubated with human recombinant SIRT along with its cosubstrate NAD+. Deacetylation sensitizes the substrate such that treatment with the developer in the second step releases a fluorescent product. The fluorophore can be analyzed with an excitation wavelength of 350-360 nm and an emission wavelength of 450-465 nm.
Soluble Epoxide Hydrolase Inhibitor Screening Assay Kit Reference: 10011671-96 Small molecule inhibitors of sEH may hold promise as therapeutics for the treatment of hypertension and vascular inflammation. Cayman’s fluorescence-based sEH Inhibitor Screening Assay provides a convenient method for screening epoxide hydrolase inhibitors. The assay utilizes (3-phenyl-oxiranyl)-acetic acid cyano-(6-methoxy-naphthalen-2-yl)-methyl ester (PHOME) as a substrate. Hydrolysis of PHOME by epoxide hydrolase produces the highly fluorescent 6-methoxy-2-naphthaldehyde which can be analyzed using an excitation wavelength of 330 nm and emission wavelength of 465 nm. Each kit contains buffer, substrate, and sufficient human recombinant sEH for 100 tests.
Glycerol Cell-Based Assay Kit Reference: 10011725-1 Cayman’s Glycerol Cell-Based Assay provides a convenient tool for studying triglycerides/fatty acid cycling and its regulation in adipocytes or hepatocytes. This kit will allow investigators to screen compounds involved in lipid storage and metabolism. Chloroquine is included in the kit as a positive control for screening pharmaceuticals that induce lipid droplet accumulation and free glycerol release from hepatocytes.
Thioredoxin Activity Fluorescent Assay Kit Reference: 11527-96 An assay for detection of Trx activity