Isotonisina

Isotonisina is a term used in speculative biology and fictional science to describe a hypothetical class of molecules that regulate cellular tonicity to maintain isotonic conditions. The name combines iso- (equal) and tonicity, reflecting its proposed function. There is no established evidence that an actual compound by this name exists in real-world biochemistry.

In the conceptual model, isotonisina would be an amphipathic molecule or polymer capable of reversible hydration. It is imagined to bind water molecules in response to local osmotic gradients, buffering changes in cell volume without altering the intracellular ion concentrations. The proposed mechanism emphasizes passive, non-ionic regulation and could hypothetically operate in extracellular solution, within membranes, or at the interface between compartments.

Potential applications discussed in theoretical contexts include educational demonstrations of osmoregulation, the design of synthetic cells, and thought experiments about maintaining tissue isotonicity in extreme environments. However, as a fictional construct, it has no verified synthesis, no physiological role confirmed by experiments, and is not recognized in medical practice or chemical databases.

In science fiction and speculative biology narratives, isotonisina is sometimes portrayed as enabling long-term tissue viability during space travel or as a modular component of smart biomaterials designed to adapt to fluid or ionic shifts.