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Pharmacokinetics and pharmacodynamics of PF-05231023, a novel long-acting FGF21 mimetic, in a first-in-human study #MMPMID25940675
Dong JQ; Rossulek M; Somayaji VR; Baltrukonis D; Liang Y; Hudson K; Hernandez-Illas M; Calle RA
Br J Clin Pharmacol 2015[Nov]; 80 (5): 1051-63 PMID25940675show ga
Aims: The aim of the present study was to evaluate the pharmacokinetics/pharmacodynamics (PK/PD), safety and tolerability of single intravenous (IV) doses of PF-05231023, a long acting fibroblast growth factor 21 (FGF21) analogue being developed for the treatment of type 2 diabetes mellitus (T2DM). Methods: T2DM subjects (glycosylated haemoglobin: 7.0?10.5%; on stable metformin therapy and/or diet and exercise) were randomized to receive a single dose of placebo or PF-05231023 (0.5?200?mg). Safety evaluations were performed up to 14?days after dosing. PK and PD endpoints were measured and a PK/PD model was developed for triglyceride ? an early marker of drug activity. Results: No antidrug antibody or serious adverse events (AEs) were observed. The most frequent AEs were gastrointestinal but were generally mild. Plasma PF-05231023 levels peaked immediately post-IV dosing, with mean terminal half-lives of 6.5?7.7?h and 66.5? 96.6?h for intact C- and N-termini, respectively. Intact C-terminus exposures increased proportionally with increasing dose, whereas N-terminus exposures appeared to trend higher than dose-proportionally. Although no apparent effect on plasma glucose was seen, dose-dependent decreases in triglyceride were observed, with a maximum reduction of 48.5?±?10.0% (mean?±?standard deviation) for the 200?mg dose compared with a reduction of 19.1?±?26.4% for placebo, demonstrating proof of pharmacology. Moreover, a reduction in total cholesterol and low-density lipoprotein cholesterol and an increase in high-density lipoprotein cholesterol were observed in the high-dose groups. Conclusions: Single IV doses of PF-05231023 up to 200?mg were generally safe and well tolerated by subjects with T2DM. The observed early sign of pharmacology supports further clinical testing of PF-05231023 upon repeated administration.