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Articles by John J. Kastelein
Total Records ( 2 ) for John J. Kastelein
  Harold E. Bays , Rene A. Braeckman , Christie M. Ballantyne , John J. Kastelein , James D. Otvos , William G. Stirtan and Paresh N. Soni


Icosapent ethyl (IPE; formerly AMR101) is a high-purity prescription form of eicosapentaenoic acid ethyl ester. In the MARINE study we evaluated the efficacy and safety of IPE in patients with very high triglycerides (TG; ≥500 mg/dL) and previously demonstrated significant reductions in TG levels with no significant increases in low-density lipoprotein (LDL) cholesterol levels.


In this follow-up, exploratory analysis, we report the effects of IPE on lipoprotein particle concentration and size.


MARINE was a phase 3, multicenter, placebo-controlled, randomized, double-blind, 12-week study. Hypertriglyceridemic patients (N = 229) were randomized to three treatment groups: IPE 4 g/day, IPE 2 g/day, or placebo. Lipoprotein particle concentrations and sizes were measured by nuclear magnetic resonance spectroscopy.


Compared with placebo, IPE 4 g/day significantly reduced median concentrations of large very-low-density lipoprotein (VLDL; −27.9%; P = .0211), total LDL (−16.3%; P = .0006), small LDL (−25.6%; P < .0001), and total high-density lipoprotein (HDL; −7.4%; P = .0063) particles and reduced VLDL particle size (−8.6%; P = .0017). In this patient population with TG ≥500 mg/dL, IPE did not significantly change the overall sizes of LDL or HDL particles.


IPE 4 g/day significantly reduced large VLDL, total LDL, small LDL, and total HDL particle concentrations and VLDL particle size in patients with TG ≥500 mg/dL. Changes in VLDL particle concentration and size reflect the TG-lowering effects of eicosapentaenoic acid. The reduction in LDL particle concentration with IPE is novel among ω-3 therapies and is consistent with the previously reported reduction in apolipoprotein B and lack of LDL-C increase with IPE in patients with very high TG levels.

  D. Meeike Kusters , Barbarba A. Hutten , Brian W. McCrindle , David Cassiman , Gordon A. Francis , Claude Gagne , Daniel Gaudet , Katherine M. Morrison , Gisle Langslet , John J. Kastelein and Albert Wiegman


Statin therapy is recommended for children with familial hypercholesterolemia (FH), but most children do not reach treatment targets.


Here we present the design and results at baseline of the ongoing CHARON study, to evaluate the safety and efficacy of rosuvastatin.


This study comprises an international 2-year open label, titration-to-goal study in 198 children with heterozygous FH aged 6 to 18 years, with rosuvastatin in a maximum dose of 10 mg (<10 years of age) or 20 mg (older children). In addition, 64 unaffected siblings were enrolled as controls. The primary efficacy outcome is the change from baseline in low-density lipoprotein cholesterol, and the secondary outcome is the change in carotid intima-media thickness (c-IMT) in patients with FH compared with their siblings. The primary safety outcomes are growth and sexual maturation; secondary outcomes are the change in other lipoprotein levels and the incidence of adverse events, discontinuation rates, and abnormal laboratory values.


At baseline, mean age of patients with FH was 12.1 ± 3.3 years, 44% were boys, and mean low-density lipoprotein cholesterol levels were 6.1 ± 1.3 mmol/L (235.9 ± 48.7 mg/dL). Mean c-IMT was 0.399 mm (95% CI, 0.392-0.406 mm) in children with FH versus 0.377 (95% CI, 0.366-0.388 mm) in unaffected siblings (P = .001).


At baseline, as expected according to on previous observations, children with FH proved to have a greater c-IMT than their healthy siblings. These differences had already occurred at a very young age, which emphasizes the importance of considering early statin initiation in this high-risk population.

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