A phase 1 clinical trial of SP16, a first-in-class anti-inflammatory LRP1 agonist, in healthy volunteers
Open Access
- 6 May 2021
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 16 (5), e0247357
- https://doi.org/10.1371/journal.pone.0247357
Abstract
Endogenous serine protease inhibitors are associated with anti-inflammatory and pro-survival signaling mediated via Low-density lipoprotein receptor-related protein 1 (LRP1) signaling. SP16 is a short polypeptide that mimics the LRP1 binding portion of alpha-1 antitrypsin. A pilot phase I, first-in-man, randomized, double blind, placebo-controlled safety study was conducted to evaluate a subcutaneous injection at three dose levels of SP16 (0.0125, 0.05, and 0.2 mg/kg [up to 12 mg]) or matching placebo in 3:1 ratio in healthy individuals. Safety monitoring included vital signs, laboratory examinations (including hematology, coagulation, platelet function, chemistry, myocardial toxicity) and electrocardiography (to measure effect on PR, QRS, and QTc). Treatment with SP16 was not associated with treatment related serious adverse events. SP16 was associated with mild-moderate pain at the time of injection that was significantly higher than placebo on a 0–10 pain scale (6.0+/-1.4 [0.2 mg/kg] versus 1.5+/-2.1 [placebo], P = 0.0088). No differences in vital signs, laboratory examinations and electrocardiography were found in those treated with SP16 versus placebo. A one-time treatment with SP16 for doses up to 0.2 mg/kg or 12 mg was safe in healthy volunteers.Funding Information
- Virginia Biosciences Health Research Corporation
- Virginia Biosciences Health Research Corporation
This publication has 15 references indexed in Scilit:
- Developing LRP1 Agonists into a Therapeutic Strategy in Acute Myocardial InfarctionInternational Journal of Molecular Sciences, 2019
- Multitarget Strategies to Reduce Myocardial Ischemia/Reperfusion InjuryJournal of Invasive Cardiology, 2019
- Inhibiting the Inflammatory Injury After Myocardial Ischemia Reperfusion With Plasma-Derived Alpha-1 Antitrypsin: A Post Hoc Analysis of the VCU-α1RT StudyJournal of Cardiovascular Pharmacology, 2018
- Low-Density Lipoprotein Receptor–Related Protein-1 Is a Therapeutic Target in Acute Myocardial InfarctionJACC: Basic To Translational Science, 2017
- A Preclinical Translational Study of the Cardioprotective Effects of Plasma-Derived Alpha-1 Anti-trypsin in Acute Myocardial InfarctionJournal of Cardiovascular Pharmacology, 2017
- Recombinant Human Alpha-1 Antitrypsin-Fc Fusion Protein Reduces Mouse Myocardial Inflammatory Injury After Ischemia–Reperfusion Independent of Elastase InhibitionJournal of Cardiovascular Pharmacology, 2016
- Effects of Prolastin C (Plasma-Derived Alpha-1 Antitrypsin) on the Acute Inflammatory Response in Patients With ST-Segment Elevation Myocardial Infarction (from the VCU-Alpha 1-RT Pilot Study)The American Journal of Cardiology, 2014
- The low-density lipoprotein receptor-related protein 1 in inflammationCurrent Opinion in Lipidology, 2013
- Serpin–Enzyme ReceptorsMethods in Enzymology, 2011
- LDL Receptor-Related Protein 1: Unique Tissue-Specific Functions Revealed by Selective Gene Knockout StudiesPhysiological Reviews, 2008