Obesity-Related Cardiovascular Mechanisms

Obesity constitutes a major global health challenge, strongly linked to cardiovascular morbidity and mortality through multifaceted mechanisms. Excess adiposity triggers haemodynamic changes, including increased blood volume and cardiac output, while promoting arterial stiffness and endothelial dysfunction. Adipose tissue secretes a spectrum of bioactive mediators—adipokines such as leptin and adiponectin—that modulate sympathetic drive, insulin sensitivity and inflammatory pathways. Chronic low-grade inflammation and oxidative stress further impair vascular homeostasis and augment arterial pressure. Central neural circuits, sensing nutrient and adipokine signals, adjust autonomic balance; heightened sympathetic activation and attenuated parasympathetic tone elevate heart rate and vascular resistance. Visceral fat depots, more metabolically active than subcutaneous stores, particularly contribute to renin-angiotensin system activation and renal sodium retention, thus sustaining hypertension. Together, these interwoven pathways underpin the development and progression of obesity-related cardiovascular disease and inform targeted therapeutic strategies ranging from lifestyle intervention to pharmacological modulation of neural, hormonal and inflammatory mediators.

Research from Nature Portfolio

Recent studies have delineated early autonomic dysregulation in diet-induced obesity models. In murine experiments, high-fat feeding rapidly diminishes central parasympathetic output via upregulation of δ-subunit-containing GABAA receptors in vagal motor neurons, yielding resting tachycardia and blunted reflex bradycardia. This work underscores central γ-aminobutyric acid signalling as a mechanistic link between excess caloric intake and cardiac vagal impairment. In parallel, population-based analyses have quantified the joint impact of body mass index and lipid abnormalities, revealing that overweight or obesity synergises with dyslipidaemia to amplify hypertension risk beyond individual contributions. This potentiating interaction highlights the importance of integrated metabolic profiling in cardiovascular risk assessment and paves the way for precision-based prevention strategies.

Obesity-Related Cardiovascular Mechanisms publication trend

The graph below shows the total number of articles in obesity-related cardiovascular mechanisms across all publications each year (not limited to Nature Index journals).

Technical terms

Adipokine: Bioactive cytokine or hormone produced by adipose tissue that influences metabolism and inflammation.

Parasympathetic tone: Baseline activity of the vagus nerve in regulating heart rate and cardiac function.

Sympathetic overdrive: Chronic elevation of sympathetic nervous system activity leading to increased heart rate and vasoconstriction.

Visceral adiposity: Accumulation of fat within the abdominal cavity around internal organs.

GABAA(δ) receptor: Extra-synaptic gamma-aminobutyric acid receptor subtype mediating tonic neuronal inhibition.

Renin-angiotensin system: Hormonal cascade regulating blood pressure and fluid balance through vasoconstriction and sodium retention.

References

1. Prevalence of Hypertension and Obesity: Profile of Mitochondrial Function and Markers of Inflammation and Oxidative Stress. Antioxidants (2023).
2. Alpha1A- and Beta3-Adrenoceptors Interplay in Adipose Multipotent Mesenchymal Stromal Cells: A Novel Mechanism of Obesity-Driven Hypertension. Cells (2023).
3. Early central cardiovagal dysfunction after high fat diet in a murine model. Scientific Reports (2023).
4. The effects of the interaction between BMI and dyslipidemia on hypertension in adults. Scientific Reports (2022).
5. Body Fat Distribution and Systolic Blood Pressure in 10,000 Adults with Whole‐Body Imaging: UK Biobank and Oxford BioBank. Obesity (2019).