Sacrificial Control Systems and Failure Variety in Acute Organ Failure

Acute organ failure can be lethal yet often reversible and relatively stereotyped despite diverse triggers. Cells facing resource limitations should direct failure toward fault-tolerant or repairable components. As importantly, the many components and pathways that can fail in different sequences create an underappreciated cybernetic problem: high failure variety, unpredictability and branching. Simplifying the failure process could promote controllability. Specialized organ function imposes load on cell-intrinsic systems, but this dependency is asymmetric: organ function can be reduced and later restored, whereas loss of ion gradients is often irreversible. Continued high performance may couple specialized work to maintenance processes through shared energy, redox, ion and proton systems. Suppressing organ function earlier than necessary could thus be a control action that avoids resource-limitation coupling, reduces failure variety and preserves controllability. Suppression of organ function could occur through regulatory systems or heightened stress-mediator sensitivity.In a sacrificial system, organ function responding to multiple stressors may convert complex failure to a simple output. An embedded sacrificial control system could arise from mediator-controlled failure sequences. Differential sensitivities of cellular processes to stress-mediators would induce sequencing that can be self-similar failure across cells if it has high ordering-probability, reducing tissue-level complexity. Acute organ dysfunction may therefore be an act of control: a simple response pattern to avoid cybernetic chaos of the failure process.