Peptide News Digest

#Pharmacokinetics

2 stories

Research · View digest

BPC-157 Pipeline Retrospective Ahead of July 23 PCAC Vote: Three Decades of Preclinical Research from the Sikiric Laboratory but No Approved Formulation, No Validated Dosing Regimen, No Completed Phase 2 Clinical Trial; Small Ulcerative Colitis Pilot Data Suggested Mucosal Healing but Full Results Never Published in Peer-Reviewed Form

Twenty days before the July 23 PCAC vote on 503A bulks list eligibility for BPC-157, the FDA staff briefing documents and independent analyst reviews converge on a consistent picture of the substance's pharmaceutical-development state. Three decades of preclinical research led primarily by Predrag Sikiric's laboratory at the University of Zagreb (200+ published rodent studies covering tendon-to-bone healing, gastric mucosal protection, and vascular regeneration) have not yielded an approved formulation, a validated human dosing regimen, or a completed Phase 2 clinical trial in any indication. Pharmacokinetic data from rat and dog studies show plasma half-life under 30 minutes after IM or IV dosing, though the biological effects (angiogenesis, anti-inflammation, tissue regeneration initiation) persist for weeks to months in animal models. A limited Phase 2 pilot evaluated oral BPC-157 in ulcerative colitis patients with preliminary data suggesting mucosal-healing improvement and clinical-symptom-score benefit, but full results have not been published in peer-reviewed form. The historical evidence base is what PCAC weighs against the July staff briefing conclusion of insufficient evidence for 503A bulks list eligibility. Several biotech companies have publicly signaled 2026 plans to develop BPC-157 analogs with improved pharmacokinetic properties for tendon repair and IBD, but no company has yet advanced an analog into IND-stage development.

Research · View digest

Frontiers in Drug Delivery: Niazi at UIC Proposes Negative-Selection Framework for Oral Peptide Therapeutics

Sarfaraz K. Niazi at the University of Illinois Chicago College of Pharmacy published a March 20, 2026 review in Frontiers in Drug Delivery arguing oral peptide delivery success depends fundamentally on molecular pharmacology rather than formulation technology. The thesis: semaglutide's approval represents a rare boundary case enabled by its ~168-hour half-life and time-integrated pharmacodynamics, not a generalizable breakthrough. The author proposes a negative-selection framework identifying which peptides should be excluded from oral development — short elimination half-lives, dose sensitivity, regulatory variability constraints — and routes excluded candidates toward pulmonary, nasal, or long-acting injectable alternatives. The framework matters for the next-generation pipeline beyond Foundayo and Wegovy pill: many programs currently chasing oral delivery may be better served by alternative routes.