Molecular changes in hypoxia-induced central neural circuits and nuclei

FactsHypoxia activates a multi-level central regulatory network involving the carotid body and multiple brainstem nuclei that coordinate autonomic and cardiopulmonary responses.Acute hypoxia induces rapid compensatory responses, while chronic hypoxia causes persistent central remodeling including neuronal injury and pathological hypertension.Understanding molecular changes and neural circuit mechanisms provides a framework for treating hypoxia-related clinical diseases.Open QuestionsThe dynamic interactions between different central nuclei and their coordination mechanisms during hypoxic responses remain incompletely understood.The critical transition point from acute adaptive compensation to chronic pathological injury in hypoxia is not well defined.The clinical translational value of potential therapeutic targets identified from central neural circuits requires systematic evaluation. Hypoxia can be classified into two types based on its temporal characteristics: acute hypoxia and chronic hypoxia, posing a severe threat to the physiological homeostasis of the body. Hypoxia stimulates peripheral chemoreceptors and activates compensatory responses in the autonomic nervous system and cardiopulmonary functions. These responses rely on coordinated regulation by the carotid body and multiple nuclei in the central nervous system. Through specific neural pathways and molecular mechanisms, the body adapts to hypoxia and sustains survival. However, severe hypoxia may lead to irreversible damage or asphyxiation. In this review, we discuss recent research on central neural circuits and molecular changes in nuclei induced by hypoxia. It focuses on key regions associated with hypoxia, including the nucleus of the solitary tract, retrotrapezoid nucleus, rostral ventral lateral medulla, parabrachial nucleus, and hypothalamic paraventricular nucleus. From a neuroscience perspective, it elaborates on the effects of hypoxia on respiratory, cardiovascular, and other bodily functions. This understanding may help guide the treatment of hypoxia-related clinical diseases.