OBJECTIVELY2963016 (LY IGlar) and Lantus (IGlar) are insulin glargine products manufactured by distinct processes but with identical amino acid sequences. Three studies evaluated the pharmacokinetic (PK) and pharmacodynamic (PD) similarity of LY IGlar and the European Union-and US-approved versions of IGlar. RESEARCH DESIGN AND METHODSThese were three single-site, randomized, double-blind, two-treatment, fourperiod, crossover, euglycemic clamp studies. In each study, fasted healthy subjects received 0.5 units/kg s.c. doses of two different insulin glargine products on two occasions each, following a randomized sequence. A ‡7-day washout period separated the doses. Blood samples were collected predose and up to 24 h postdose to assess PK; PD was assessed by a euglycemic clamp lasting up to 24 h. RESULTSA total of 211 subjects participated in the three studies. The PK (area under the curve [AUC]; maximum observed concentration [C max ]) and PD (maximum glucose infusion rate [R max ]; total glucose infusion during the clamp [G tot ]) were similar between LY IGlar and IGlar, with the ratios of geometric means ranging from 0.90 to 0.95 for PK parameters and from 0.91 to 0.99 for PD parameters across studies. In all cases, the 90% CIs for the ratios of geometric means were completely contained in the prespecified acceptance limits of 0.80-1.25. Adverse events were similar between treatments. CONCLUSIONSThese studies demonstrated that the PK and PD properties of LY IGlar and IGlar were similar after single 0.5 units/kg s.c. doses in healthy subjects, contributing to the totality of evidence supporting similarity of these products.

OBJECTIVEWe evaluated the endogenous glucose production (EGP) and glucose disposal rate (GDR) over a range of doses of basal insulin peglispro (BIL) and insulin glargine in healthy subjects. RESEARCH DESIGN AND METHODSThis was a single-center, randomized, open-label, four-period, incomplete-block, crossover study conducted in eight healthy male subjects. Subjects had 8-h euglycemic clamps performed with primed, continuous infusions of BIL (5.1 to 74.1 mU/min) in three dosing periods and insulin glargine (20 or 30 mU/m 2 /min) in a fourth period, targeted to achieve 50-100% suppression of EGP. D-[3-3 H] glucose was infused to assess rates of glucose appearance and disappearance. RESULTSMean BIL and insulin glargine concentrations (targeted to reflect the differences in intrinsic affinities of the two basal insulins) ranged from 824 to 11,400 and 212 to 290 pmol/L, respectively, and increased accordingly with increases in dose. Suppression of EGP and stimulation of GDR were observed with increasing concentrations of both insulins. At insulin concentrations where EGP was significantly suppressed, insulin glargine resulted in increased GDR. In contrast, at comparable suppression of EGP, BIL had minimal effect on GDR at lower doses and had substantially less effect on GDR than insulin glargine at higher doses. CONCLUSIONSThe novel basal insulin analog BIL has relative hepatopreferential action and decreased peripheral action, compared with insulin glargine, in healthy subjects.In vivo, insulin is secreted from pancreatic b-cells and enters the circulation via the portal vein, where on first pass the liver extracts ;40-80% (1-7). As a result, systemic circulating insulin levels are reduced compared with those in the portal vein, and subsequent insulin action in the peripheral target tissues is also reduced compared with the liver. Consequently, the relative ratio of hepatic action to peripheral action ranges between 2:1 and 4:1 (1,2,4,8-10). In contrast, when exogenous insulin is administered peripherally, insulin is distributed equally across the liver and peripheral tissues (11,12) and thus does not mimic normal physiology.

Lecithin-cholesterol acyltransferase deficiency is frequently associated with hypertriglyceridemia (HTG) in animal models and humans. We investigated the mechanism of HTG in the ldlr؊/؊ ؋ lcat؊/؊ (double knockout (dko)) mice using the ldlr؊/؊ ؋ lcat؉/؉ (knock-out (ko)) littermates as control. Mean fasting triglyceride (TG) levels in the dko mice were elevated 1.75-fold compared with their controls (p < 0.002). Both the very low density lipoprotein and the low density lipoprotein/intermediate density lipoprotein fractions separated by fast protein liquid chromatography were TG-enriched in the dko mice. In vitro lipolysis assay revealed that the dko mouse very low density lipoprotein (d < 1.019 g/ml) fraction separated by ultracentrifugation was a more efficient substrate for lipolysis by exogenous bovine lipoprotein lipase. Post-heparin lipoprotein lipase activity was reduced by 61% in the dko mice. Hepatic TG production rate, determined after intravenous Triton WR1339 injection, was increased 8-fold in the dko mice. Hepatic mRNA levels of sterol regulatory element binding protein-1 (srebp-1) and its target genes acetyl-CoA carboxylase-1 (acc-1), fatty acid synthase (fas), and stearoyl-CoA desaturase-1 (scd-1) were significantly elevated in the dko mice compared with the ko control. The hepatic mRNA levels of LXR␣ (lxr␣) and its target genes including angiopoietin-like protein 3 (angptl-3) in the dko mice were unchanged. Fasting glucose and insulin levels were reduced by 31 and 42%, respectively in the dko mice, in conjunction with a 49% reduction in hepatic pepck-1 mRNA (p ‫؍‬ 0.014). Both the HTG and the improved fasting glucose phenotype seen in the dko mice are at least in part attributable to an up-regulation of the hepatic srebp-1c gene.

Aims LY2963016 (LY IGlar) and Lantus (IGlar) are insulin glargine products manufactured by distinct processes, but with identical amino acid sequences. This study compared the duration of action of LY IGlar and IGlar in subjects with type 1 diabetes mellitus (T1DM).Materials and methodsThis was a randomized, double‐blind, single‐dose, two‐period, crossover study. Twenty subjects underwent 42‐hour euglycaemic clamps after a single subcutaneous 0.3‐U/kg dose of LY IGlar or IGlar. In this study, the duration of action was defined as the time required for blood glucose levels to rise consistently above a predefined cut‐off of 8.3 mmol/L (150 mg/dL) from a state of euglycaemia. Blood samples were collected to measure blood glucose for pharmacodynamic (PD) evaluations.ResultsEnd of action was reached within 42 hours in 26 of 40 clamps (13 LY IGlar and 13 IGlar). The median duration of action for all subjects was 37.1 and 40.0 hours, and the mean duration of action (calculated using only patients who reached end of action) was 23.8 and 25.5 hours for LY IGlar and IGlar, respectively. The duration of action was demonstrated to be similar between the treatments using time‐to‐event analysis (log‐rank test of equality p = .859). Following administration of LY IGlar and IGlar, the PD parameters of maximum glucose infusion rate (R max) and total glucose infusion during the clamp (G tot) were comparable.Conclusion LY IGlar and IGlar had similar duration of action and comparable PD parameters in subjects with T1DM.

LY2963016 (LY IGlar) and Lantus (IGlar) are insulin glargine products with identical amino acid sequences. This was a phase 1 single-site, randomized, subject- and investigator-blinded, 4-treatment, 4-period crossover study to compare the pharmacokinetic (PK) and pharmacodynamic (PD) properties of LY IGlar and IGlar at 2 different doses. Fasted healthy subjects were randomly assigned to receive 2 single doses of LY IGlar and IGlar (0.3 and 0.6 U/kg for each product). Blood samples were collected up to 24 hours postdose to assess PK, and a euglycemic clamp lasting up to 24 hours postdose was conducted to assess PD. Twenty-four healthy subjects aged 23 to 52 years participated in the study. The primary PK parameters (area under the concentration versus time curve from 0 to 24 hours [AUC ] and maximum observed drug concentration [C ]) and PD parameters (total amount of glucose infused during the clamp [G ] and maximum glucose infusion rate [R ]) were not statistically different between LY IGlar and IGlar at either dose. No safety concerns were noted with either drug. The study demonstrated that the PK and PD parameters for LY IGlar and IGlar were comparable following single doses at both 0.3 and 0.6 U/kg.