Holiday Notification: Cayman Chemical will be closed Monday, May 28, 2012, in observance of the Memorial Day holiday.
More…
Please feel free to continue placing orders via our website or via fax at 734-971-3640. You may send an email to customer service at custserv@caymanchem.com , or to technical support at techserv@caymanchem.com which we will respond to the next business day. Cayman will resume regular business hours and shipping schedules on Tuesday, May 29, 2012. Thank you for your patience and understanding.
The cyclic nucleotide second messenger guanosine 3’5’-cyclic monophosphate (cGMP) is an important mediator of signal transduction and hence a wide range of cellular processes. It is generated by soluble- and particulate-type guanylyl cyclase and degraded via members of the phosphodiesterase (PDE) protein family. Icariin, the active component of the Chinese medicinal plant E. brevicornum, is an inhibitor of human recombinant PDE5 with an IC50 value of 5.9 µM.1 It is a prenylated flavonol that has been used to treat erectile dysfunction and has been shown to have anti-cancer and antioxidant activity.2 At a concentration of 1 x 107 mol/L, icariin induces differentiation of cardiomyocytes and upregulates the expression of cardiac genes.3 At 20 µg/ml, icariin increases the proliferation and differentiation of cultured human osteoblasts, which appears to be mediated in part by upregulating bone morphogenetic protein 2 mRNA.4
1
Dell'Agli, M., Galli, G.V., Dal Cero, E., et al. Potent inhibition of human phosphodiesterase-5 by icariin derivatives. J Nat Prod71(9)1513-1517(2008).
2
Chen, Y., Zhao, Y.H., Jia, X.B., et al. Intestinal absorption mechanisms of prenylated flavonoids present in the heat-processed epimedium koreanum Nakai (Yin Yanghuo). Pharm Res25(9)2190-2199(2008).
3
Ding, L., Liang, X., Zhu, D., et al. Icariin promotes expression of PGC-1α, PPARα, and NRF-1 during cardiomyocyte differentiation of murine embryonic stem cells in vitro. Acta Pharmacol Sin28(10)1541-1549(2007).
4
Yin, X., Chen, Z., Liu, Z., et al. Icariine stimulates proliferation and differentiation of human osteoblasts by increasing production of bone morphogenetic protein 2. Chin Med J120(3)204-210(2007).
Yin, X., Chen, Z., Liu, Z., et al. Icariine stimulates proliferation and differentiation of human osteoblasts by increasing production of bone morphogenetic protein 2. Chin Med J120(3)204-210(2007).
Ding, L., Liang, X., Zhu, D., et al. Icariin promotes expression of PGC-1α, PPARα, and NRF-1 during cardiomyocyte differentiation of murine embryonic stem cells in vitro. Acta Pharmacol Sin28(10)1541-1549(2007).
Chen, Y., Zhao, Y.H., Jia, X.B., et al. Intestinal absorption mechanisms of prenylated flavonoids present in the heat-processed epimedium koreanum Nakai (Yin Yanghuo). Pharm Res25(9)2190-2199(2008).
Dell'Agli, M., Galli, G.V., Dal Cero, E., et al. Potent inhibition of human phosphodiesterase-5 by icariin derivatives. J Nat Prod71(9)1513-1517(2008).