Details

Autor(en) / Beteiligte

• Hoffmann, Matthew
• Kumar, Gondi
• Schafer, Peter
• Cedzik, Dorota
• Capone, Lori
• Fong, Kei-Lai
• Gu, Zheming
• Heller, Dennis
• Feng, Hao
• Surapaneni, Sekhar
• Laskin, Oscar
• Wu, Anfan

Titel

Disposition, metabolism and mass balance of [14C]apremilast following oral administration

Ist Teil von

• Xenobiotica, 2011-12, Vol.41 (12), p.1063-1075

Ort / Verlag

England: Informa Healthcare

Erscheinungsjahr

2011

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• Apremilast is a novel, orally available small molecule that specifically inhibits PDE4 and thus modulates multiple pro- and anti-inflammatory mediators, and is currently under clinical development for the treatment of psoriasis and psoriatic arthritis. The pharmacokinetics and disposition of [14C]apremilast was investigated following a single oral dose (20 mg, 100 μCi) to healthy male subjects. Approximately 58% of the radioactive dose was excreted in urine, while faeces contained 39%. Mean Cmax, AUC0-∞ and tmax values for apremilast in plasma were 333 ng/mL, 1970 ng*h/mL and 1.5 h. Apremilast was extensively metabolized via multiple pathways, with unchanged drug representing 45% of the circulating radioactivity and <7% of the excreted radioactivity. The predominant metabolite was O-desmethyl apremilast glucuronide, representing 39% of plasma radioactivity and 34% of excreted radioactivity. The only other radioactive components that represented >4% of the excreted radioactivity were O-demethylated apremilast and its hydrolysis product. Additional minor circulating and excreted compounds were formed via O-demethylation, O-deethylation, N-deacetylation, hydroxylation, glucuronidation and/or hydrolysis. The major metabolites were at least 50-fold less pharmacologically active than apremilast. Metabolic clearance of apremilast was the major route of elimination, while non-enzymatic hydrolysis and excretion of unchanged drug were involved to a lesser extent.