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Background: Tadalafil is a small-molecule inhibitor of phosphodiesterase 5 (PDE5), a predominant PDE in the pulmonary vasculature that hydrolyzes cyclic guanosine monophosphate (cGMP) and is involved in the pathobiology of pulmonary arterial hypertension (PAH). Although it is used for the treatment of erectile dysfunction through oral administration, tadalafil also improves the vasoconstrictive-predominate condition of PAH through elevating cGMP levels in pulmonary vessels resulted from PDE5 inhibition.
Biological Activity: Tadalafil is a PDE-5 inhibitor with IC50 of 1.8 nM. The inhibitory effect of tadalafil is PDE5 specific with the selectivity of 10000 fold greater than that of PDE1, PDE4, PDE7, PDE8, PDE9 and PDE10 and 780 fold greater than PDE6.
CAS Number: 171596-29-5
Description: Tadalafil, also known as IC351 or Cialis, is a potent, reversible and competitive small-molecule inhibitor of PDE5
Purity: ≥98% by HPLC
Solubility: Soluble in DMSO
Storage Stability: Store at or below -20°C. Solid form is stable at least 12 months from date of receipt, when stored as directed. Do not store aqueous solutions for more than one day.
Target: PDE5
Biosafety Level: Not applicable (BSL-1)
References: 1. Sawamura, F., et al. J Pharmacol Sci 111, 235-243 (2009)
2. Porst, H. Int. J. Impotence Res. (2002) 14, Suppl 1, S57-S64.
3. Forgue, S.T., et al. Br J Clin Pharmacol (2005); 61(3): 280-288.
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