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Heart-brain axis: Pushing the boundaries of cardiovascular molecular imaging
Maria Khalil1, Hui Chong Lau1, James T Thackeray2
1Cardiovascular Imaging Research Center, Massachusetts General Hospital, Boston, MA, USA; Division of Cardiology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA.
Insights
The heart-brain axis links heart and brain health, with shared risks influenced by sex. Molecular imaging offers new insights into this complex relationship, but more research is needed.
Area of Science:
- Cardiovascular Science
- Neuroscience
- Integrative Biology
Background:
- The heart-brain axis describes the bidirectional communication between the cardiovascular and central nervous systems.
- Epidemiological studies show organ damage in one system increases pathology risk in the other.
- Pathways involve autonomic, metabolic, inflammatory, and neurohormonal mechanisms, with sex-specific differences.
Purpose of the Study:
- To explore the complex pathobiology of the heart-brain axis.
- To highlight the role of molecular imaging in understanding heart-brain interactions.
- To identify areas for future research and intervention.
Main Methods:
- Review of epidemiological evidence linking heart and brain pathologies.
- Analysis of known crosstalk mechanisms including autonomic, metabolic, and inflammatory pathways.
- Evaluation of molecular imaging techniques for simultaneous tissue analysis.
Main Results:
- Strong evidence supports a connection between heart and brain insults.
- Sex differences exist in the pathways mediating heart-brain crosstalk.
- Molecular imaging provides novel insights into organ system interplay during stress and disease.
Conclusions:
- The heart-brain axis is a critical area of research with significant clinical implications.
- Understanding sex-specific mechanisms is crucial for targeted therapies.
- Further investigation using advanced imaging is needed to elucidate underlying mechanisms and test interventions.
Abstract:
Despite decades of research, the heart-brain axis continues to challenge investigators seeking to unravel its complex pathobiology. Strong epidemiologic evidence supports a link by which insult or injury to one of the organs increases the risk of pathology in the other. The putative pathways have important differences between sexes and include alterations in autonomic function, metabolism, inflammation, and neurohormonal mechanisms that participate in crosstalk between the heart and brain and contribute to vascular changes, the development of shared risk factors, and oxidative stress. Recently, given its unique ability to characterize biological processes in multiple tissues simultaneously, molecular imaging has yielded important insights into the interplay of these organ systems under conditions of stress and disease. Yet, additional research is needed to probe further into the mechanisms underlying the heart-brain axis and to evaluate the impact of targeted interventions.
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