misregulation

Misregulation is the improper or insufficient regulation of a system, resulting in deviations from normal control. In biology, misregulation commonly refers to regulatory processes that fail to proceed in the correct times, places, or amounts, leading to abnormal gene expression, signaling, or metabolism. It can arise from genetic mutations, epigenetic changes, environmental influences, or perturbations of regulatory networks, including transcription factors, noncoding RNAs, and chromatin modifiers.

Developmental misregulation can cause tissue mispatterning, congenital anomalies, or lethality. In cancer, misregulation of growth signaling or cell-cycle control promotes uncontrolled proliferation. Circadian misregulation disrupts daily rhythms and is linked to sleep disorders, metabolic disease, and mood disorders. Immune misregulation can cause autoimmunity or chronic inflammation.

Mechanisms of misregulation include mutations in regulatory genes, gene copy number changes, alternative splicing, or misexpression of enhancers that alter when and where genes are active. Disruptions to feedback loops, signal transduction components, or chromatin modifiers can also destabilize regulatory networks, leading to amplified or dampened responses.

Detection and study of misregulation employ genomics, transcriptomics, proteomics, metabolomics, and single-cell analyses to identify abnormal patterns. Computational modeling and perturbation experiments help infer causal relationships and test potential interventions.

Implications and management aim to restore proper regulation through approaches such as targeted therapies, epigenetic treatments, gene therapy, or environmental modification. Misregulation is a central concept across biology and medicine, and the term is also used in discussions of regulatory failures in nonbiological domains, where improper governance can yield unintended consequences.