Information Fidelity describes the degree of accuracy and precision with which a biological signal, such as a hormone’s message or a neurotransmitter’s pulse, is transmitted, received, and interpreted across the cellular and systemic communication networks. High fidelity ensures that the body’s internal instructions are executed correctly, leading to optimal physiological outcomes and robust homeostatic control. Diminished fidelity, often due to receptor downregulation or chronic inflammation, contributes to functional decline.
Origin
A term borrowed from communication theory and adapted for cell biology, ‘information’ refers to the biological signal itself, and ‘fidelity’ refers to the faithfulness of its reproduction or transmission. In endocrinology, it emphasizes the quality of hormonal messaging.
Mechanism
At the molecular level, high fidelity relies on the precise binding of a ligand to its receptor, the integrity of the receptor’s structure, and the efficiency of the subsequent intracellular signal transduction cascade. Hormones maintain fidelity by regulating the number and sensitivity of their receptors, ensuring the target cell accurately “hears” the message. Factors like oxidative stress and toxic accumulation can introduce “noise,” degrading this essential communication fidelity.
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