Abstract
Volatile anesthetics modulate a variety of physiological and pathophysiological responses including hypoxic responses. Hypoxia-inducible factor 1 (HIF-1) is a transcription factor that mediates cellular and systemic homeostatic responses to reduced O(2) availability in mammals, including erythropoiesis, angiogenesis, and glycolysis. We demonstrate for the first time that the volatile anesthetic halothane blocks HIF-1 activity and downstream target gene expressions induced by hypoxia in the human hepatoma-derived cell line, Hep3B. Halothane reversibly blocks hypoxia-induced HIF-1alpha protein accumulation and transcriptional activity at clinically relevant doses.
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