Panel A shows two peri-implant tissue states: coherent and dysregulated. In the coherent tissue state, cells maintain multicellular communication and tissue-derived feedback supported by regulatory mechanisms including DNA methylation, histone modifications, transcription factor availability, chromatin accessibility, nucleosome positioning, and cis-regulatory elements. The dysregulated tissue state depicts cells with self-reinforcing programs uncoupled from tissue-level feedback, leading to regulatory drift and loss of coordinated tissue function. An enlarged nuclear inset illustrates distinct chromatin environments across cell types, depicting regulatory components such as histone modifications, DNA methylation, RNA polymerase, and transcription factors. Various cell types, including neurons, oligodendrocytes, oligodendrocyte precursor cells, microglia, macrophages, and astrocytes, are depicted with distinct symbols. Panel B presents a line graph illustrating cellular response trajectories over time relative to changing tissue demands. Two response trajectories are shown: a green trajectory representing coordinated adaptation and a red trajectory representing loss of coordination and tissue dysfunction. Dashed lines represent changing, context-dependent tissue demands, including repair, functional remodeling, and allostatic optimization.
Conceptual model of how chronic perturbation can rewire cellular memory from adaptive tissue coordination toward regulatory drift. (A) In an adaptive peri-implant tissue state, cell-autonomous survival programs remain coordinated with multicellular communication and tissue-derived feedback. This coordination is regulated through epigenetic changes such as DNA methylation, histone modifications, transcription factor availability, chromatin accessibility, nucleosome positioning, and cis-regulatory elements. Together, these regulatory layers allow cells to respond to chronic perturbation while maintaining lineage fidelity and tissue coherence. In a dysregulated state, however, chronic stress can drive self-reinforcing cellular programs that become uncoupled from tissue-level feedback, leading to regulatory drift, altered communication, and loss of coordinated tissue function. (B) Response trajectories illustrate how cells continuously compensate for changing tissue demands over time. The dashed lines represent context-dependent functional requirements, not simply the amount of inflammation. Adaptive responses may involve repair, functional remodeling, or allostatic optimization depending on the tissue state. The green trajectory represents coordinated adaptation, where cellular responses remain aligned with tissue needs. The red trajectory represents failed compensation, where cellular programs become mismatched to context, leading to loss of coordination, chronic inflammatory signaling, and tissue dysfunction.