Lymphatic System Biology and Pathophysiology
Summary
The lymphatic system comprises a unidirectional network of capillaries, collecting vessels, lymph nodes and ducts that cooperatively maintain tissue fluid balance, absorb dietary lipids and orchestrate immune surveillance. Lymphatic endothelial cells form specialised junctions to facilitate interstitial fluid uptake, while intrinsic vessel contractility and surrounding tissue movements drive lymph propulsion. Within lymph nodes, stromal cells and specialised conduits organise antigen presentation and lymphocyte activation, ensuring rapid immune responses. Dysregulation of lymphatic function contributes to a wide spectrum of disorders: insufficient drainage underlies lymphedema and chronic inflammation; aberrant lymphangiogenesis promotes tumour metastasis via lymph node seeding; impaired lymphatic clearance exacerbates cardiovascular injury and hampers tissue regeneration; and excessive vessel permeability alters interstitial pressure in autoimmune and inflammatory diseases. Advances in imaging and molecular biology have begun to reveal how lymphatic networks adapt to physiological stresses and how perturbations in key signalling pathways can be exploited for therapeutic benefit.
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Lymphatic System Biology and Pathophysiology publication trend
The graph below shows the total number of articles in lymphatic system biology and pathophysiology across all publications each year (not limited to Nature Index journals).
Technical terms
Lymphangiogenesis: Formation of new lymphatic vessels from pre-existing structures, driven by factors such as VEGF-C and VEGF-D acting on VEGFR-3.
Lymphatic endothelial cell (LEC): Specialized endothelial cell lining lymphatic vessels, characterised by expression of markers such as LYVE-1 and Prox-1.
Fibroblastic reticular cell (FRC): Stromal cell within lymph nodes that forms a reticular network guiding lymphocyte and dendritic cell movement and presenting survival signals.
VEGF-C/VEGFR-3 signalling: Key growth factor pathway regulating lymphatic vessel growth, maintenance and permeability, with roles in development, tissue repair and pathological lymphangiogenesis.
Interstitial fluid pressure (IFP): Hydrostatic pressure within the interstitial space, influenced by lymphatic drainage efficiency and vessel permeability, affecting tissue oedema and immune cell trafficking.
References
- Lymphatic vessels in bone support regeneration after injury. Cell (2023).
- Lymph node metastasis in cancer progression: molecular mechanisms, clinical significance and therapeutic interventions. Signal Transduction and Targeted Therapy (2023).
- The cardiac lymphatic system stimulates resolution of inflammation following myocardial infarction. Journal of Clinical Investigation (2018).
- Inflammation and Lymphatic Function. Frontiers in Immunology (2019).
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