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ECM950 Adipogenesis Assay

The Adipogenesis Assay provides a convenient format for induction & analysis of adipogenesis in the classic 3T3-L1 model.

Adipogenesis Assay : FDS (Fiches de données de sécurité), certificats d’analyse (CoA) et de qualité (CoQ), dossiers, brochures et autres documents disponibles.
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ECM950
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      Aperçu

      Replacement Information

      Tableau de caractéristiques principal

      Detection Methods
      Chromogenic
      Description
      Catalogue NumberECM950
      Brand Family Chemicon®
      Trade Name
      • Chemicon
      DescriptionAdipogenesis Assay
      OverviewObesity is a significant clinical problem that contributes to life-threatening diseases such as diabetes and atherosclerosis. The process of adipogenesis, the formation of adipose tissue, has become better understood by the study of several cell types that can be induced to undergo differentiation into adipocytes. The first, and best characterized, model of adipogenesis in vitro is the 3T3-L1 cell line, a substrain of Swiss 3T3 mouse cell line (Kehinde and Green, 1974). 3T3-L1 cells propagated under normal conditions have a fibroblastic phenotype. However, when treated with a combination of dexamethasone, isobutylmethylxanthine (IBMX or MIX) and insulin, 3T3-L1 cells adopt a rounded phenotype and within 5 days begin to accumulate lipids intracellularly in the form of lipid droplets (Figure 1; Rubin et al., 1978). Another cell line, 3T3-F442A, is blocked from differentiating at a later stage, and requires only insulin to differentiate.

      The biochemical pathways of adipogenesis have become increasingly well understood with the use of the 3T3-L1 model (reviewed in Gregoire et al., 1998; Rosen et al., 2000). Treatment of cells with dexamethasone activates the transcription factor CCAAT/enhancer-binding protein b (C/EBPb). IBMX inhibits soluble cyclic nucleotide phosphodiesterases and results in increased intracellular cAMP levels (Elks and Manganiello, 1985). At the nuclear level, treatment with IBMX results in activation of the related transcription factor C/EBPd. C/EBPb and d in turn induce transcription of C/EBPa and PPARγ. Within 3 days of exposure to inducers, the cells undergo two rounds of mitosis, termed mitotic clonal expansion, which are required for differentiation (Tang et al., 2003). Insulin or insulin-like growth factor-1 promote adipocyte differentiation by activating PI3-kinase and Akt activity. Modulation of the activity of the forkhead transcription factor Foxo1 appears to be necessary for insulin to promote adipocyte differentiation (Nakae et al., 2003). C/EBPa and PPARγ direct the final phase of adipogenesis by activating expression of adipocyte-specific genes, such as fatty acid synthetase, fatty acid binding protein, leptin and adiponectin.

      Endogenous negative regulators of adipocyte differentiation, such as Pref-1 and Wnt-10b, are highly expressed on undifferentiated 3T3-L1 cells, and are down-regulated upon addition of adipogenesis inducers (Ross et al., 2000; Mei et al., 2002). In addition, cytokines such as tumor necrosis factor alpha (TNFa) and transforming growth factor beta (TGF-b) interfere with adipocyte differentiation (Gregoire et al., 1998).

      The identification of regulators of adipogenesis raises the prospect of preventing or reversing obesity through pharmacological means. PPARγ has received particular attention as a target, as it is essential for the final phase of adipocyte differentiation and is a pharmacological target for the thiazolidinedione class of antidiabetic drugs. The pro-adipogenic effect of the thiazolidinediones has led to interest in identifying compounds that retain antidiabetic activity without promoting adipogenesis. In addition, inhibitors of PPARγ activity have been identified that inhibit adipogenesis, and might serve as the basis for development of effective anti-obesity drugs (Wright et al., 2000; Camp et al., 2001).
      Materials Required but Not Delivered· 3T3-L1 Preadipocyte cell line (can be obtained from ATCC: ATCC# CL-173).

      · Media for propagation of 3T3-L1 cells - DMEM with 10% calf serum (not fetal calf serum) and antibiotics.

      · Adipogenesis basal media - DMEM with 10% fetal calf serum and antibiotics.

      · 24-well or other size tissue culture plates for induction of adipogenesis.

      · Spectrophotometer or 96-well plate reader capable of detecting 490 nm or 520 nm.
      References
      Product Information
      Components
      • IBMX Solution - (Catalog No. 90355) - One vial containing 250 μl of 0.5 M 3-isobutyl-1-methylxanthine (IBMX) in DMSO.
      • Insulin Solution - (Catalog No. 90356) - One vial containing 250 μl of 10 mg/mL recombinant human insulin.
      • Dexamethasone Solution - (Catalog No. 90357) - One vial containing 100 μl of 10 mM dexamethasone in ethanol.
      • Oil Red O Solution - (Catalog No. 90358) - One bottle containing 60 mL 0.36% Oil Red O solution in 60% isopropanol.
      • Wash Solution - (Catalog No. 90360) - Two bottles containing 250 mL each of wash solution.
      • Dye Extraction Solution - (Catalog No. 90359) - One bottle containing 30 mL of dye extraction solution.
      Detection methodChromogenic
      HS Code3822 19 90
      Quality LevelMQ100
      Applications
      ApplicationThe Adipogenesis Assay provides a convenient format for induction & analysis of adipogenesis in the classic 3T3-L1 model.
      Application NotesThe Chemicon Adipogenesis Assay provides a convenient format for induction and analysis of adipogenesis in the classic 3T3-L1 model. The most commonly used inducers of adipogenesis, dexamethasone, IBMX and insulin, are provided in convenient, ready-to-use formulations. In addition, reagents for staining of differentiated adipocytes are provided to allow the investigator to obtain quantitative information about inducers and inhibitors of adipogenesis. A solution of Oil Red O is used to stain lipid droplets in mature adipocytes. A wash solution is provided to remove free Oil Red O from the cell layer. Also included is Dye Extraction Solution that extracts lipid-bound Oil Red O for measurement in a spectrophotometer (Figure 2).
      Biological Information
      Physicochemical Information
      Dimensions
      Materials Information
      Toxicological Information
      Safety Information according to GHS
      Safety Information
      Product Usage Statements
      Usage Statement
      • Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
      Storage and Shipping Information
      Storage ConditionsNote: Kit components require two different storage temperatures.

      Dexamethasone Solution, IBMX Solution and Insulin Solution should be stored at -20ºC. Oil Red O Solution, Wash Solution, and Dye Extraction Solution should be stored at room temperature. Storage of Oil Red O Solution and Dye Extraction Solution at -20ºC may result in formation of insoluble precipitates and is not recommended. If Oil Red O solution forms a precipitate, remove particulates by passage through a 0.22 or 0.45 micron filter.· Oil Red O stains skin and clothing. IBMX and dexamethasone are irritants and potentially toxic. DMSO is readily absorbed through the skin. Wear a lab coat and gloves when handling these solutions.

      Precautions:
      Isopropanol is flammable. Keep solutions containing isopropanol (Oil Red O Solution, Wash Solution and Dye Extraction Solution) away from open flames.
      Packaging Information
      Material Size1 kit
      Transport Information
      Supplemental Information
      Specifications
      Global Trade Item Number
      Référence GTIN
      ECM950 04053252014673

      Documentation

      Adipogenesis Assay FDS

      Titre

      Fiche de données de sécurité des matériaux (FDS) 

      Références bibliographiques

      Aperçu de la référence bibliographiqueNº PubMed
      Gene expression profile of dental pulp cells during differentiation into an adipocyte lineage.
      Tadashige Nozaki,Kiyoshi Ohura
      Journal of pharmacological sciences  115  2010

      Afficher le résumé       		21350315 21350315