Abstract:
OBJECTIVES:To evaluate the pharmacokinetics and effects of the first immediate-release (IR) niacin-aspirin prodrug (ST0702) on lipid, prostaglandin and thromboxane levels in non-human primates (NHPs). METHODS:We compared 28 mg/kg crystalline IR niacin, equimolar doses of crystalline IR ST0702 and control on low density lipoprotein cholesterol (LDL-C), apolipoprotein B (ApoB) and triglycerides (Tg) in NHPs (6 per group) over 48 h (daily oral gavage). In addition, we compared IR niacin and ST0702 effects on prostaglandin (PG)D(2), ex vivo thromboxane B(2) (TXB(2)) levels and plasma pharmacokinetics. RESULTS:ST0702 is metabolised in vivo to aspirin, niacin and salicylic acid with T(max) values of 30, 45 and 95 min respectively using a non-compartmental model. ST0702 resulted in 38% and 40% reductions in LDL-C and ApoB levels compared to control over the 48 h period (p = 0.027 and p = 0.012 respectively). Corresponding values were 32% and 25% for niacin (both p = NS vs control). ST0702, but not niacin, decreased Tg levels (p = 0.017 for between group difference). Post prandial glycaemia was attenuated vs baseline in the ST0702 group only. Ex vivo serum TXB(2) generation was suppressed at 15 min and complete suppression of TXB(2) was sustained at 24h (p<0.01 vs niacin). ST0702 suppressed PGD(2) exposure eightfold (p = 0.012) compared to niacin over the first 24h. CONCLUSIONS:This two-dose study in NHPs suggests that ST0702 is more effective than IR niacin on lipid profiles, while suppressing TXB(2) and PGD(2) increases and prevents post-prandial glycaemia. ST0702 shows promise as a new IR therapeutic option for niacin.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Ledwidge MT,Ryan F,Kerins DM,O'Connell D,Cefali G,Harmon S,Jones M,Gilmer JFdoi
10.1016/j.atherosclerosis.2012.01.016subject
Has Abstractpub_date
2012-04-01 00:00:00pages
478-83issue
2eissn
0021-9150issn
1879-1484pii
S0021-9150(12)00049-4journal_volume
221pub_type
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