Medical Physiology

Medical Physiology examines how the human body’s components operate individually and in concert to sustain life under varied conditions. Central to this field is the study of homeostatic mechanisms—the dynamic processes by which organ systems regulate critical variables such as oxygenation, pH, blood pressure, fluid balance and metabolic flux. From molecular signals that modulate ion channels, receptor–ligand interactions and intracellular pathways, to organ-level integration across the cardiovascular, respiratory, renal, endocrine, musculoskeletal and immune systems, medical physiology reveals the interplay of structure and function. Advances in imaging, omics technologies, computational modelling and in vivo monitoring have deepened our understanding of reflex arcs, feedback loops and emergent properties. This insight underpins the development of novel diagnostics, targeted therapies and device-based interventions aimed at correcting dysfunction, from ventilatory support and renal replacement to neuromodulation and pharmacological regulation of bone remodelling. By bridging basic science and clinical practice, medical physiology remains vital to addressing global health challenges, informing personalised medicine and optimising patient care.

Research from Nature Portfolio

Recent studies have shown that restoring mitochondrial NADH dehydrogenase activity in complex I-deficient mice rescues acute hypoxic ventilatory responses by reinstating electron transport in carotid body glomus cells, pinpointing a gene-therapy approach to breathing disorders. Investigations under controlled hypercapnia demonstrate that feedforward synaptic signals, rather than CO₂-mediated metabolic by-products, sustain neurovascular coupling and local cerebral blood flow, refining strategies to protect the brain under acidosis. Further structural analyses reveal that glutamate functions as a positive allosteric modulator of acid-sensing ion channel 1a, exacerbating ischaemia-induced neurotoxicity, while selective blockade of its binding site reduces infarct size and enhances functional recovery, suggesting a new target for stroke intervention.

Research from all publishers

Activation of hypoxia-inducible factor 2α in adrenal chromaffin cells is sufficient to induce oxygen chemosensitivity outside the carotid body, identifying a master transcriptional driver of peripheral O₂ sensing and opening avenues for reprogramming non-chemoreceptor tissues. In heart failure models, impaired lymphatic drainage and interstitial hypertension underlie persistent congestion, and augmented lymph flow through device-based modulation at the thoracic duct outlet markedly improves interstitial decongestion independent of diuretic therapy. Additionally, in osteoporotic fracture healing, combined parathyroid hormone and β-receptor blockade synergistically reverses sympathetic inhibition of osteoblasts, enhancing bone formation and suggesting an autonomic-metabolic strategy for improving systemic repair.

Medical Physiology publication trend

The graph below shows the total number of articles in medical physiology across all publications each year (not limited to Nature Index journals).

Technical terms

Homeostasis: The dynamic regulation of physiological variables within narrow limits to maintain stable internal conditions.

Arterial chemoreception: Detection of blood O₂, CO₂ or pH changes by specialised glomus cells that drive ventilatory reflexes.

Neurovascular coupling: The process by which neuronal activity signals adjacent microvessels to increase local blood flow.

Mitochondrial complex I: The first enzyme complex of the electron transport chain that oxidises NADH and initiates proton motive force.

Hypoxia-inducible factor 2α (HIF-2α): A transcription factor that activates gene programmes conferring oxygen sensitivity in peripheral chemoreceptor cells.

Interstitial decongestion: Removal of excess fluid from the interstitial compartment, often via lymphatic drainage, to relieve oedema.

Acid-sensing ion channel 1a (ASIC1a): A proton-gated cation channel that mediates injury in extracellular acidosis and is modulated by glutamate.

β-Receptor blocker: A drug that antagonises sympathetic β-adrenergic receptors, influencing heart rate and bone metabolism.

References

1. β-Receptor blocker enhances the anabolic effect of PTH after osteoporotic fracture. Bone Research (2024).
2. Transgenic NADH dehydrogenase restores oxygen regulation of breathing in mitochondrial complex I-deficient mice. Nature Communications (2023).
3. Neurovascular coupling during hypercapnia in cerebral blood flow regulation. Nature Communications (2024).
4. Glutamate acts on acid-sensing ion channels to worsen ischaemic brain injury. Nature (2024).
5. Hif-2α programmes oxygen chemosensitivity in chromaffin cells. Journal of Clinical Investigation (2024).
6. The interstitial compartment as a therapeutic target in heart failure. Frontiers in Cardiovascular Medicine (2022).
7. Overview of the Internal Physiological System of the Human Body.