Mechanical stress-driven conformational compaction of polydeoxyribonucleotide for enhanced transdermal regenerative therapy

Abstract

Biomacromolecular therapeutics face critical size-dependent transdermal delivery limitations that restrict their clinical effectiveness. To overcome this constraint, a conformation-altering strategy using controlled mechanical stress is reported to achieve substantial structural compaction of polydeoxyribonucleotide (PDRN) without chemical intervention. By applying mild vacuum conditions that force PDRN molecules to pass through a silica particle media, a 1.8-fold size reduction of the radius of gyration was achieved, from 52.92 nm to 29.36 nm. The characterization of these molecules through SAXS and gel electrophoresis confirms the spatial conformational alteration without damage to the molecule structure or biofunctionality. Clinical trials validated the therapeutic superiority of conformationally modified PDRN, supported by enhanced cellular uptake, superior procollagen synthesis, accelerated wound healing kinetics, and upregulated extracellular matrix remodeling while preserving native adenosine A2A receptor-mediated signaling pathways. This conformational control methodology transcends traditional structure–function paradigms, establishing a platform for enhancing biomacromolecule bioavailability in dermatological therapeutics and regenerative medicine, allowing deepened tissue penetration without compromising biological activity.