Neurogenic Mechanisms of Hypertension Regulation

Hypertension arises not only from vascular or renal dysfunction but also from dysregulation of central neural circuits that control sympathetic outflow and blood‐pressure homeostasis. Key brain centres, notably the rostral ventrolateral medulla and the paraventricular nucleus of the hypothalamus, integrate hormonal cues, afferent baroreceptor signals and local neuromodulators to set basal vasomotor tone. Within these nuclei, activation of the renin–angiotensin system amplifies excitatory neurotransmission while concurrent neuroinflammation and oxidative stress further perturb the balance between inhibitory and excitatory pathways. Glial cells, including astrocytes and microglia, contribute by releasing cytokines and reactive oxygen species that modulate neuronal firing and synaptic plasticity. Mechanical forces transmitted through interstitial‐fluid flow have also emerged as modulators of receptor expression in brainstem astrocytes, revealing a novel link between physical activity and central blood‐pressure control. Together, these mechanisms form a complex network in which local inflammatory and metabolic alterations reinforce sympathetic drive, perpetuating neurogenic hypertension. Understanding these pathways has yielded new therapeutic avenues—ranging from targeted peptide blockade within autonomic nuclei to non‐invasive mechanical interventions—that may complement existing pharmacological agents and offer personalised strategies for blood‐pressure management.

Research from Nature Portfolio

Recent studies have demonstrated that low‐amplitude oscillatory head movements can reduce blood pressure in hypertensive animals and humans by generating interstitial‐fluid shear stresses in the medullary extracellular space. These mechanical forces attenuate expression of the angiotensin II type-1 receptor in brainstem astrocytes, dampening sympathetic outflow. In a complementary line of enquiry, central inhibition of the bioactive peptide salusin β within the paraventricular nucleus has been shown to reverse hypertension in a genetic rat model. Peptide blockade reduced proinflammatory cytokine release, reactive oxygen species generation and shifted renin–angiotensin components towards antihypertensive axes, thereby lowering sympathetic nerve activity and improving cardiac structure and function.

Neurogenic Mechanisms of Hypertension Regulation publication trend

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

Technical terms

Rostral ventrolateral medulla (RVLM): Brainstem nucleus that drives basal sympathetic vasomotor tone.

Paraventricular nucleus (PVN): Hypothalamic centre integrating neuroendocrine and autonomic signals for cardiovascular regulation.

Neuroinflammation: Immune‐like activation within the CNS, often involving microglial proliferation and cytokine release.

Reactive oxygen species (ROS): Highly reactive oxygen‐containing molecules that modulate signalling or cause cellular damage.

Renin–angiotensin system (RAS): Hormonal cascade that regulates blood pressure and fluid balance, centred on angiotensin II actions.

Interstitial‐fluid shear stress: Mechanical force exerted by fluid movement in extracellular spaces that influences cellular receptor expression.

References

1. Interstitial-fluid shear stresses induced by vertically oscillating head motion lower blood pressure in hypertensive rats and humans. Nature Biomedical Engineering (2023).
2. Microglia-derived TNF-α contributes to RVLM neuronal mitochondrial dysfunction via blocking the AMPK–Sirt3 pathway in stress-induced hypertension. Journal of Neuroinflammation (2023).
3. Effect of Short-Term Restraint Stress on the Expression of Genes Associated with the Response to Oxidative Stress in the Hypothalamus of Hypertensive ISIAH and Normotensive WAG Rats. Antioxidants (2024).
4. Role of Inflammatory Processes in the Brain-Body Relationship Underlying Hypertension. Current Hypertension Reports (2023).
5. Neuroinflammation and oxidative stress in rostral ventrolateral medulla contribute to neurogenic hypertension induced by systemic inflammation. Journal of Neuroinflammation (2012).
6. Central blockade of salusin β attenuates hypertension and hypothalamic inflammation in spontaneously hypertensive rats. Scientific Reports (2015).
7. Angiotensin-II-induced reactive oxygen species along the SFO-PVN-RVLM pathway: implications in neurogenic hypertension. Brazilian Journal of Medical and Biological Research (2011).