Abstract:
PURPOSE:Proprotein convertase subtilisin-kexin type 9 (PCSK9) promotes low density lipoprotein (LDL) receptor degradation, thereby providing a key pathway for LDL metabolism. PCSK9 mRNA expression may be upregulated by insulin in murine models. Here we examined effects of exogenous hyperinsulinemia on plasma PCSK9 levels in humans without and with type 2 diabetes mellitus. METHODS:A 24h moderately hyperinsulinemic glucose clamp (30 mU/kg/h) was performed in 8 healthy men and 8 male type 2 diabetic patients. Plasma PCSK9 was measured using a sandwich enzyme-linked immunosorbent assay. RESULTS:Plasma LDL cholesterol and apolipoprotein B were lowered by insulin in healthy subjects and diabetic patients (P < 0.01 for all), whereas triglycerides were also decreased in healthy subjects (P < 0.01). Plasma PCSK9 levels remained unchanged in healthy subjects (median (interquartile range) change, -23 (-63 to 25) %, P = 0.50) and in diabetic patients (change, 4 (-17 to 44) %, P = 0.20). Individual absolute and relative changes in LDL cholesterol, apolipoprotein B and triglycerides after 24h of insulin were unrelated to changes in PCSK9 (P > 0.15 for all). CONCLUSION:Plasma PCSK9 levels are not increased by exposure to moderate 24h hyperinsulinemia in healthy and type 2 diabetic individuals.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Kappelle PJ,Lambert G,Dullaart RPdoi
10.1016/j.atherosclerosis.2010.10.028subject
Has Abstractpub_date
2011-02-01 00:00:00pages
432-5issue
2eissn
0021-9150issn
1879-1484pii
S0021-9150(10)00882-8journal_volume
214pub_type
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