Using Mitra sampling to support first-in-human pharmacokinetic evaluations for PF-07059013.

A sensitive and selective method for the determination of PF-07059013 in dried blood collected by Mitra™ tips was developed and qualified from 50 to 50,000 ng/ml. PF-07059013 is isolated from 10 μl of human dried blood by extraction with methanol and analyzed by HPLC-MS/MS. In addition to routine validation elements, impact of hematocrit and Mitra tip's lot-to-lot variation on assay accuracy were evaluated. The qualified method was used in one clinical study with excellent performance. Correlation coefficient between blood concentrations obtained from liquid-incurred blood samples and dried-incurred blood samples is 0.95. NCT04323124 (ClinicalTrials.gov).