Cayman is a manufacturer, supplier, and vendor of biochemical reagents,
assay kits, forensic chemistry standards, antibodies, and proteins for
scientific research. Analytical testing services and custom synthesis are
Cayman Chemical Company
· 1180 East Ellsworth Road
· Ann Arbor, Michigan 48108
The liver X receptors (LXRα and LXRβ) are nuclear hormone receptors whose native ligands are oxysterols.1 Acetyl podocarpic acid anhydride (APD) is potent, semi-synthetic LXR agonist derived from extracts of the mayapple. APD acting through LXR in concert with the retinoid X receptor (RXR), its heterodimerization partner, induces the expression of the ABCA1 reverse cholesterol transporter.2 This acts to increase the efflux of cholesterol from enterocytes and thus inhibits the overall absorption of cholesterol (ED50 value of 1 nM).3 In transient transactivation assays, APD was found to be approximately 1,000 times more potent and have 8-10-fold greater maximal stimulation of LXR than 22(R)-hydroxy cholesterol.3,4 APD can be used as a positive control for the testing of LXR agonists, which have potential as therapeutic agents for the treatment of atherosclerosis.
1.Repa, J.J., Turley, S.D., Lobaccaro, J.A., et al. Regulation of absorption and ABC1-mediated efflux of cholesterol by RXR heterodimers. Science2891524-1529(2000).
2.Costet, P., Luo, Y., Wang, N., et al. Sterol-dependent transactivation of the ABC1 promoter by the liver X receptor/retinoid X receptor. J Biol Chem27528240-28245(2000).
3.Sparrow, C.P., Baffic, J., Lam, M., et al. A potent synthetic LXR agonist is more effective than cholesterol loading at inducing ABCA1 mRNA and stimulating cholesterol efflux. J Biol Chem277(12)10021-10027(2002).
4.Singh, S.B., Ondeyka, J.G., Liu, W., et al. Discovery and development of dimeric podocarpic acid leads as potent agonists of liver X receptor with HDL cholesterol raising activity in mice and hamsters. Bioorg Med Chem Lett152824-2828(2005).
Cayman Chemical Company regularly evaluates our shipping methods to ensure product stability is maintained and our corporate environmental impact is minimized. Products selected for review are evaluated and shipping methods are certified by our Scientists. While occasionally our method of shipping a product may change, rest assured the shipping conditions on all Cayman Chemical products have been reviewed and validated.
Upon receipt, it is important to check the storage requirements of your products and place them at the appropriate temperature. Products shipped without ice may require frozen storage for long term stability.
Cayman Chemical was formed over thirty years ago by demonstrating the value of naturally growing gorgonian corals as a renewable, economically viable source of prostaglandins. Today we operate our business knowing that we owe our start to the renewable resources our environment had provided. As Cayman Chemical continues to grow we consistently evaluate our business processes to ensure we are operating at the highest environmental standards.