PMID- 26683109 OWN - NLM STAT- MEDLINE DCOM- 20161005 LR - 20220408 IS - 1872-6623 (Electronic) IS - 0304-3959 (Linking) VI - 157 IP - 1 DP - 2016 Jan TI - A randomized, phase 2 study investigating TRV130, a biased ligand of the mu-opioid receptor, for the intravenous treatment of acute pain. PG - 264-272 LID - 10.1097/j.pain.0000000000000363 [doi] AB - Efficacy of conventional opioids can be limited by adverse events (AEs). TRV130 is a structurally novel biased ligand of the mu-opioid receptor that activates G protein signaling with little beta-arrestin recruitment. In this phase 2, randomized, placebo- and active-controlled study, we investigated the efficacy and tolerability of TRV130 in acute pain after bunionectomy. We used an adaptive study design in which 144 patients experiencing moderate-to-severe acute pain after bunionectomy were randomized to receive double-blind TRV130, placebo, or morphine in a pilot phase. After pilot phase analysis, 195 patients were randomized to receive double-dummy TRV130 0.5, 1, 2, or 3 mg every 3 hours (q3h); placebo; or morphine 4 mg q4h intravenously. The primary end point was the time-weighted average change in numeric rating scale pain intensity over the 48-hour treatment period. Secondary end points included stopwatch and categorical assessments of pain relief. Safety and tolerability were also assessed. TRV130 2 and 3 mg q3h, and morphine 4 mg q4h produced statistically greater mean reductions in pain intensity than placebo over 48 hours (P < 0.005). TRV130 at 2 and 3 mg produced significantly greater categorical pain relief than morphine (P < 0.005) after the first dose, with meaningful pain relief occurring in under 5 minutes. TRV130 produced no serious AEs, with tolerability similar to morphine. These results demonstrate that TRV130 rapidly produces profound analgesia in moderate-to-severe acute pain, suggesting that G-protein-biased mu-opioid receptor activation is a promising target for development of novel analgesics. FAU - Viscusi, Eugene R AU - Viscusi ER AD - Thomas Jefferson University, Philadelphia, PA, USA PRA Health Sciences, Salt Lake City, UT, USA Premier Research Group Ltd, Austin, TX, USA Cytel Inc, Chesterbrook, PA, USA Trevena, Inc, King of Prussia, PA, USA. FAU - Webster, Lynn AU - Webster L FAU - Kuss, Michael AU - Kuss M FAU - Daniels, Stephen AU - Daniels S FAU - Bolognese, James A AU - Bolognese JA FAU - Zuckerman, Seth AU - Zuckerman S FAU - Soergel, David G AU - Soergel DG FAU - Subach, Ruth Ann AU - Subach RA FAU - Cook, Emily AU - Cook E FAU - Skobieranda, Franck AU - Skobieranda F LA - eng PT - Clinical Trial, Phase II PT - Journal Article PT - Randomized Controlled Trial PL - United States TA - Pain JT - Pain JID - 7508686 RN - 0 (((3-methoxythiophen-2-yl)methyl)((2-(9-(pyridin-2-yl)-6-oxaspiro(4.5)decan-9-yl)ethyl))amine) RN - 0 (Analgesics, Opioid) RN - 0 (Receptors, Opioid, mu) RN - 0 (Spiro Compounds) RN - 0 (Thiophenes) RN - 76I7G6D29C (Morphine) SB - IM MH - Acute Pain/*drug therapy/etiology MH - Adolescent MH - Adult MH - Aged MH - Analgesics, Opioid/*therapeutic use MH - Double-Blind Method MH - Female MH - Hallux Valgus/surgery MH - Humans MH - Male MH - Middle Aged MH - Morphine/therapeutic use MH - Orthopedic Procedures/adverse effects MH - Receptors, Opioid, mu/*agonists MH - Spiro Compounds/*therapeutic use MH - Thiophenes/*therapeutic use MH - Treatment Outcome MH - Young Adult EDAT- 2015/12/20 06:00 MHDA- 2016/10/07 06:00 CRDT- 2015/12/20 06:00 PHST- 2015/12/20 06:00 [entrez] PHST- 2015/12/20 06:00 [pubmed] PHST- 2016/10/07 06:00 [medline] AID - 00006396-201601000-00027 [pii] AID - 10.1097/j.pain.0000000000000363 [doi] PST - ppublish SO - Pain. 2016 Jan;157(1):264-272. doi: 10.1097/j.pain.0000000000000363.