Hyaluronan fragmentation delays matrix maturation

A skin-repair hypothesis asks whether hyaluronan fragments, water-binding material around cells, can blur damage timing and delay matrix strengthening. The test uses human dermal fibroblasts, skin cells that build and remodel this surrounding matrix. It would give the same CD44-to-ERK signal sequence, from a cell-surface receptor to an internal signaling pathway, beside each damage episode or at shifted, shuffled times. Hydration, mechanics, hyaluronan exposure and ERK activity would be matched. Faster mechanical readiness with damage-aligned signals, plus restored distinction between new damage and recovery, would support temporal coding. Equal recovery would weaken it; rapid cell-free benefit from selective hyaluronan cleavage would favor a structural explanation.