“There is just too much going on there”: Integrative challenges of noncanonical intercellular signalling in bioelectrically divergent tissue domains

July 12
Background Atypical paracrine, juxtacrine, and bioelectrical cue exchanges are increasingly recognised as diagnostic markers of bioelectrically divergent tissue compartments, yet little is known about how such domains deploy protrusive contacts, ion‐flux–driven gradients, and other noncanonical modalities during morphogenesis—especially when examined from the perspective of the cellular collectives themselves. The objectives of this study were to understand: (1) how bioelectrically divergent cells integrate noncanonical cues during tissue assembly, (2) how these signalling patterns influence overall organ patterning and homeostasis, and (3) how cells compensate for, or attenuate, signalling discrepancies. Methods Twenty-seven high‐resolution, time-lapse morphogenetic recordings from an open digital repository—each centred on noncanonical cue exchange—were subjected to qualitative morphodynamic analysis. Inductive and deductive feature annotation was used to identify signalling episodes relevant to mis-patterning events, communicative strengths, and compensatory manoeuvres. A total of 362 discrete signalling episodes were annotated (κ = 0.79). Annotated clips were then extracted and thematically analysed, with feedback from independent in silico reviewers. Results Major themes included: (1) Bioelectrical divergence imposes elevated energetic and temporal costs on cells attempting to parse complex cue environments; (2) Mis-signalling between divergent and canonical cell populations is bidirectional; (3) Aberrant cue processing can impair tissue integrity and regenerative potential; (4) Cells deploy a repertoire of compensatory strategies—ranging from up-regulation of stretch-activated channels to dynamic reorganisation of gap junction networks—to restore informational flow; and (5) Considerable heterogeneity exists both in emission and interpretation of noncanonical cues across individual cells and microdomains. Conclusion Several themes—particularly bidirectional mis-signalling and the downstream penalties of cue divergence—mirror previous qualitative work on morphogenetic communication. The present findings provide fresh insight into the intracellular and extracellular determinants of noncanonical signal integration, highlighting the energetic and computational burdens involved. We advocate for ecosystem-level solutions that distribute the responsibility for effective information transfer across all tissue constituents—for example, openly declaring preferred signalling modalities and verifying cue reception rather than assuming canonical pathways are universally understood.