Sparian Biosciences has initiated a Phase I study of SBS-147, an arylepoxamide receptor (AEAr) agonist under development for the treatment of both acute and chronic pain.

The trial is focused on oral administration and targets expanded dosing flexibility over previous compounds.

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SBS-1000, the precursor designed for acute pain, has already completed a Phase I single-ascending dose (SAD) trial as a parenteral compound and remains under development for acute pain use.

The Phase I trial combines single and multiple ascending dose arms and will assess the tolerability, pharmacokinetics, and safety of SBS-147 in healthy volunteers.

The therapy’s development from Phase I to Phase II will be funded by a National Institutes of Health (NIH) / National Institute on Drug Abuse (NIDA) HEAL grant of $15m. This marks the company’s fifth NIH/NIDA award, with total government grants amounting to $75m.

Washington University in St Louis professor Susruta Majumdar was involved in the development of both SBS-147 and SBS-1000.

Sparian Biosciences CEO Dr Jeffrey Reich said: “SBS-147 builds on the success of the first-generation AEAr agonist, SBS-1000. The added dosing flexibility as an oral compound expands potential indications to include acute and chronic pain.

“Effective pain management remains a significant challenge across medicine and surgery, and SBS-147 has the potential to replace opioids for the treatment of acute and chronic pain. In the face of the ongoing opioid crisis, we believe the AEAr agonists like SBS-147 and SBS-1000 could represent fundamental and critically needed innovation.

“We have been eager to get back into the clinic with the next-generation AEAr agonist, one with oral dosing, and we hope that the promising preclinical profile of SBS-147 will translate to human studies.”