Local stabilization of HIF-1α via deferoxamine-loaded collagen-chitosan sponge scaffold accelerates healing of type 2 diabetic wounds in rats
By: Khalid Alshaghdali, Suad A. Alghamdi, Abdulkarim S. Binshaya, Tawfiq N. Juraybi, Amani Alghamdi, Adil Abalkhail, Lamaia R. Altarjami, Mohammed Alissa | Published in: Tissue & Cell (Elsevier) | April 2026
Diabetic wounds heal poorly in part because high blood sugar dampens a key “low-oxygen alarm” called HIF-1α — the molecular signal that normally tells injured tissue to grow new blood vessels, recruit repair cells and close over. If you could switch that alarm back on locally, right at the wound bed, you might jump-start healing without any of the systemic side effects of oral or injected drugs.
That is exactly what this group set out to do. They built a collagen-chitosan sponge loaded with deferoxamine (DFO), a decades-old iron-chelating drug (already FDA-approved for iron overload) that “fakes” a low-oxygen state and stabilises HIF-1α. They tested it on full-thickness wounds in type-2 diabetic rats, comparing no treatment, a plain sponge and the drug-loaded sponge. The DFO sponge clearly outperformed both controls: wounds closed faster by day 8, the new tissue was stronger and better-organised, small blood-vessel density rose sharply, pro-healing signals (HIF-1α, SDF-1α, VEGF, TGF-β) went up while inflammatory ones (TNF-α, IL-1β) went down, and oxidative-stress markers improved — a less hostile wound environment overall.
This is a pre-clinical rat study, so it is far too early to ask your wound-care team for a DFO sponge on the next dressing change. What makes it interesting is the “re-use an old drug” angle: deferoxamine has decades of human safety data, chelator-releasing scaffolds are buildable with familiar biomaterials, and the mechanism — forcing a stalled wound to act like it is hypoxic again — tackles several of diabetes’ healing problems at once. Expect to see more work testing this idea in larger animal models and, eventually, in carefully selected patients with non-healing ulcers.
📎 Source: Alshaghdali K, Alghamdi SA, Binshaya AS, et al. Tissue & Cell (2026) — https://doi.org/10.1016/j.tice.2026.103538
Comments
